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ba395927 | 1 | /* |
ea8ea460 | 2 | * Copyright © 2006-2014 Intel Corporation. |
ba395927 KA |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
ea8ea460 DW |
13 | * Authors: David Woodhouse <dwmw2@infradead.org>, |
14 | * Ashok Raj <ashok.raj@intel.com>, | |
15 | * Shaohua Li <shaohua.li@intel.com>, | |
16 | * Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>, | |
17 | * Fenghua Yu <fenghua.yu@intel.com> | |
9f10e5bf | 18 | * Joerg Roedel <jroedel@suse.de> |
ba395927 KA |
19 | */ |
20 | ||
9f10e5bf JR |
21 | #define pr_fmt(fmt) "DMAR: " fmt |
22 | ||
ba395927 KA |
23 | #include <linux/init.h> |
24 | #include <linux/bitmap.h> | |
5e0d2a6f | 25 | #include <linux/debugfs.h> |
54485c30 | 26 | #include <linux/export.h> |
ba395927 KA |
27 | #include <linux/slab.h> |
28 | #include <linux/irq.h> | |
29 | #include <linux/interrupt.h> | |
ba395927 KA |
30 | #include <linux/spinlock.h> |
31 | #include <linux/pci.h> | |
32 | #include <linux/dmar.h> | |
33 | #include <linux/dma-mapping.h> | |
34 | #include <linux/mempool.h> | |
75f05569 | 35 | #include <linux/memory.h> |
aa473240 | 36 | #include <linux/cpu.h> |
5e0d2a6f | 37 | #include <linux/timer.h> |
dfddb969 | 38 | #include <linux/io.h> |
38717946 | 39 | #include <linux/iova.h> |
5d450806 | 40 | #include <linux/iommu.h> |
38717946 | 41 | #include <linux/intel-iommu.h> |
134fac3f | 42 | #include <linux/syscore_ops.h> |
69575d38 | 43 | #include <linux/tboot.h> |
adb2fe02 | 44 | #include <linux/dmi.h> |
5cdede24 | 45 | #include <linux/pci-ats.h> |
0ee332c1 | 46 | #include <linux/memblock.h> |
36746436 | 47 | #include <linux/dma-contiguous.h> |
091d42e4 | 48 | #include <linux/crash_dump.h> |
8a8f422d | 49 | #include <asm/irq_remapping.h> |
ba395927 | 50 | #include <asm/cacheflush.h> |
46a7fa27 | 51 | #include <asm/iommu.h> |
ba395927 | 52 | |
078e1ee2 JR |
53 | #include "irq_remapping.h" |
54 | ||
5b6985ce FY |
55 | #define ROOT_SIZE VTD_PAGE_SIZE |
56 | #define CONTEXT_SIZE VTD_PAGE_SIZE | |
57 | ||
ba395927 | 58 | #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY) |
18436afd | 59 | #define IS_USB_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_SERIAL_USB) |
ba395927 | 60 | #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA) |
e0fc7e0b | 61 | #define IS_AZALIA(pdev) ((pdev)->vendor == 0x8086 && (pdev)->device == 0x3a3e) |
ba395927 KA |
62 | |
63 | #define IOAPIC_RANGE_START (0xfee00000) | |
64 | #define IOAPIC_RANGE_END (0xfeefffff) | |
65 | #define IOVA_START_ADDR (0x1000) | |
66 | ||
67 | #define DEFAULT_DOMAIN_ADDRESS_WIDTH 48 | |
68 | ||
4ed0d3e6 | 69 | #define MAX_AGAW_WIDTH 64 |
5c645b35 | 70 | #define MAX_AGAW_PFN_WIDTH (MAX_AGAW_WIDTH - VTD_PAGE_SHIFT) |
4ed0d3e6 | 71 | |
2ebe3151 DW |
72 | #define __DOMAIN_MAX_PFN(gaw) ((((uint64_t)1) << (gaw-VTD_PAGE_SHIFT)) - 1) |
73 | #define __DOMAIN_MAX_ADDR(gaw) ((((uint64_t)1) << gaw) - 1) | |
74 | ||
75 | /* We limit DOMAIN_MAX_PFN to fit in an unsigned long, and DOMAIN_MAX_ADDR | |
76 | to match. That way, we can use 'unsigned long' for PFNs with impunity. */ | |
77 | #define DOMAIN_MAX_PFN(gaw) ((unsigned long) min_t(uint64_t, \ | |
78 | __DOMAIN_MAX_PFN(gaw), (unsigned long)-1)) | |
79 | #define DOMAIN_MAX_ADDR(gaw) (((uint64_t)__DOMAIN_MAX_PFN(gaw)) << VTD_PAGE_SHIFT) | |
ba395927 | 80 | |
1b722500 RM |
81 | /* IO virtual address start page frame number */ |
82 | #define IOVA_START_PFN (1) | |
83 | ||
f27be03b | 84 | #define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT) |
284901a9 | 85 | #define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32)) |
6a35528a | 86 | #define DMA_64BIT_PFN IOVA_PFN(DMA_BIT_MASK(64)) |
5e0d2a6f | 87 | |
df08cdc7 AM |
88 | /* page table handling */ |
89 | #define LEVEL_STRIDE (9) | |
90 | #define LEVEL_MASK (((u64)1 << LEVEL_STRIDE) - 1) | |
91 | ||
6d1c56a9 OBC |
92 | /* |
93 | * This bitmap is used to advertise the page sizes our hardware support | |
94 | * to the IOMMU core, which will then use this information to split | |
95 | * physically contiguous memory regions it is mapping into page sizes | |
96 | * that we support. | |
97 | * | |
98 | * Traditionally the IOMMU core just handed us the mappings directly, | |
99 | * after making sure the size is an order of a 4KiB page and that the | |
100 | * mapping has natural alignment. | |
101 | * | |
102 | * To retain this behavior, we currently advertise that we support | |
103 | * all page sizes that are an order of 4KiB. | |
104 | * | |
105 | * If at some point we'd like to utilize the IOMMU core's new behavior, | |
106 | * we could change this to advertise the real page sizes we support. | |
107 | */ | |
108 | #define INTEL_IOMMU_PGSIZES (~0xFFFUL) | |
109 | ||
df08cdc7 AM |
110 | static inline int agaw_to_level(int agaw) |
111 | { | |
112 | return agaw + 2; | |
113 | } | |
114 | ||
115 | static inline int agaw_to_width(int agaw) | |
116 | { | |
5c645b35 | 117 | return min_t(int, 30 + agaw * LEVEL_STRIDE, MAX_AGAW_WIDTH); |
df08cdc7 AM |
118 | } |
119 | ||
120 | static inline int width_to_agaw(int width) | |
121 | { | |
5c645b35 | 122 | return DIV_ROUND_UP(width - 30, LEVEL_STRIDE); |
df08cdc7 AM |
123 | } |
124 | ||
125 | static inline unsigned int level_to_offset_bits(int level) | |
126 | { | |
127 | return (level - 1) * LEVEL_STRIDE; | |
128 | } | |
129 | ||
130 | static inline int pfn_level_offset(unsigned long pfn, int level) | |
131 | { | |
132 | return (pfn >> level_to_offset_bits(level)) & LEVEL_MASK; | |
133 | } | |
134 | ||
135 | static inline unsigned long level_mask(int level) | |
136 | { | |
137 | return -1UL << level_to_offset_bits(level); | |
138 | } | |
139 | ||
140 | static inline unsigned long level_size(int level) | |
141 | { | |
142 | return 1UL << level_to_offset_bits(level); | |
143 | } | |
144 | ||
145 | static inline unsigned long align_to_level(unsigned long pfn, int level) | |
146 | { | |
147 | return (pfn + level_size(level) - 1) & level_mask(level); | |
148 | } | |
fd18de50 | 149 | |
6dd9a7c7 YS |
150 | static inline unsigned long lvl_to_nr_pages(unsigned int lvl) |
151 | { | |
5c645b35 | 152 | return 1 << min_t(int, (lvl - 1) * LEVEL_STRIDE, MAX_AGAW_PFN_WIDTH); |
6dd9a7c7 YS |
153 | } |
154 | ||
dd4e8319 DW |
155 | /* VT-d pages must always be _smaller_ than MM pages. Otherwise things |
156 | are never going to work. */ | |
157 | static inline unsigned long dma_to_mm_pfn(unsigned long dma_pfn) | |
158 | { | |
159 | return dma_pfn >> (PAGE_SHIFT - VTD_PAGE_SHIFT); | |
160 | } | |
161 | ||
162 | static inline unsigned long mm_to_dma_pfn(unsigned long mm_pfn) | |
163 | { | |
164 | return mm_pfn << (PAGE_SHIFT - VTD_PAGE_SHIFT); | |
165 | } | |
166 | static inline unsigned long page_to_dma_pfn(struct page *pg) | |
167 | { | |
168 | return mm_to_dma_pfn(page_to_pfn(pg)); | |
169 | } | |
170 | static inline unsigned long virt_to_dma_pfn(void *p) | |
171 | { | |
172 | return page_to_dma_pfn(virt_to_page(p)); | |
173 | } | |
174 | ||
d9630fe9 WH |
175 | /* global iommu list, set NULL for ignored DMAR units */ |
176 | static struct intel_iommu **g_iommus; | |
177 | ||
e0fc7e0b | 178 | static void __init check_tylersburg_isoch(void); |
9af88143 DW |
179 | static int rwbf_quirk; |
180 | ||
b779260b JC |
181 | /* |
182 | * set to 1 to panic kernel if can't successfully enable VT-d | |
183 | * (used when kernel is launched w/ TXT) | |
184 | */ | |
185 | static int force_on = 0; | |
186 | ||
46b08e1a MM |
187 | /* |
188 | * 0: Present | |
189 | * 1-11: Reserved | |
190 | * 12-63: Context Ptr (12 - (haw-1)) | |
191 | * 64-127: Reserved | |
192 | */ | |
193 | struct root_entry { | |
03ecc32c DW |
194 | u64 lo; |
195 | u64 hi; | |
46b08e1a MM |
196 | }; |
197 | #define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry)) | |
46b08e1a | 198 | |
091d42e4 JR |
199 | /* |
200 | * Take a root_entry and return the Lower Context Table Pointer (LCTP) | |
201 | * if marked present. | |
202 | */ | |
203 | static phys_addr_t root_entry_lctp(struct root_entry *re) | |
204 | { | |
205 | if (!(re->lo & 1)) | |
206 | return 0; | |
207 | ||
208 | return re->lo & VTD_PAGE_MASK; | |
209 | } | |
210 | ||
211 | /* | |
212 | * Take a root_entry and return the Upper Context Table Pointer (UCTP) | |
213 | * if marked present. | |
214 | */ | |
215 | static phys_addr_t root_entry_uctp(struct root_entry *re) | |
216 | { | |
217 | if (!(re->hi & 1)) | |
218 | return 0; | |
46b08e1a | 219 | |
091d42e4 JR |
220 | return re->hi & VTD_PAGE_MASK; |
221 | } | |
7a8fc25e MM |
222 | /* |
223 | * low 64 bits: | |
224 | * 0: present | |
225 | * 1: fault processing disable | |
226 | * 2-3: translation type | |
227 | * 12-63: address space root | |
228 | * high 64 bits: | |
229 | * 0-2: address width | |
230 | * 3-6: aval | |
231 | * 8-23: domain id | |
232 | */ | |
233 | struct context_entry { | |
234 | u64 lo; | |
235 | u64 hi; | |
236 | }; | |
c07e7d21 | 237 | |
cf484d0e JR |
238 | static inline void context_clear_pasid_enable(struct context_entry *context) |
239 | { | |
240 | context->lo &= ~(1ULL << 11); | |
241 | } | |
242 | ||
243 | static inline bool context_pasid_enabled(struct context_entry *context) | |
244 | { | |
245 | return !!(context->lo & (1ULL << 11)); | |
246 | } | |
247 | ||
248 | static inline void context_set_copied(struct context_entry *context) | |
249 | { | |
250 | context->hi |= (1ull << 3); | |
251 | } | |
252 | ||
253 | static inline bool context_copied(struct context_entry *context) | |
254 | { | |
255 | return !!(context->hi & (1ULL << 3)); | |
256 | } | |
257 | ||
258 | static inline bool __context_present(struct context_entry *context) | |
c07e7d21 MM |
259 | { |
260 | return (context->lo & 1); | |
261 | } | |
cf484d0e JR |
262 | |
263 | static inline bool context_present(struct context_entry *context) | |
264 | { | |
265 | return context_pasid_enabled(context) ? | |
266 | __context_present(context) : | |
267 | __context_present(context) && !context_copied(context); | |
268 | } | |
269 | ||
c07e7d21 MM |
270 | static inline void context_set_present(struct context_entry *context) |
271 | { | |
272 | context->lo |= 1; | |
273 | } | |
274 | ||
275 | static inline void context_set_fault_enable(struct context_entry *context) | |
276 | { | |
277 | context->lo &= (((u64)-1) << 2) | 1; | |
278 | } | |
279 | ||
c07e7d21 MM |
280 | static inline void context_set_translation_type(struct context_entry *context, |
281 | unsigned long value) | |
282 | { | |
283 | context->lo &= (((u64)-1) << 4) | 3; | |
284 | context->lo |= (value & 3) << 2; | |
285 | } | |
286 | ||
287 | static inline void context_set_address_root(struct context_entry *context, | |
288 | unsigned long value) | |
289 | { | |
1a2262f9 | 290 | context->lo &= ~VTD_PAGE_MASK; |
c07e7d21 MM |
291 | context->lo |= value & VTD_PAGE_MASK; |
292 | } | |
293 | ||
294 | static inline void context_set_address_width(struct context_entry *context, | |
295 | unsigned long value) | |
296 | { | |
297 | context->hi |= value & 7; | |
298 | } | |
299 | ||
300 | static inline void context_set_domain_id(struct context_entry *context, | |
301 | unsigned long value) | |
302 | { | |
303 | context->hi |= (value & ((1 << 16) - 1)) << 8; | |
304 | } | |
305 | ||
dbcd861f JR |
306 | static inline int context_domain_id(struct context_entry *c) |
307 | { | |
308 | return((c->hi >> 8) & 0xffff); | |
309 | } | |
310 | ||
c07e7d21 MM |
311 | static inline void context_clear_entry(struct context_entry *context) |
312 | { | |
313 | context->lo = 0; | |
314 | context->hi = 0; | |
315 | } | |
7a8fc25e | 316 | |
622ba12a MM |
317 | /* |
318 | * 0: readable | |
319 | * 1: writable | |
320 | * 2-6: reserved | |
321 | * 7: super page | |
9cf06697 SY |
322 | * 8-10: available |
323 | * 11: snoop behavior | |
622ba12a MM |
324 | * 12-63: Host physcial address |
325 | */ | |
326 | struct dma_pte { | |
327 | u64 val; | |
328 | }; | |
622ba12a | 329 | |
19c239ce MM |
330 | static inline void dma_clear_pte(struct dma_pte *pte) |
331 | { | |
332 | pte->val = 0; | |
333 | } | |
334 | ||
19c239ce MM |
335 | static inline u64 dma_pte_addr(struct dma_pte *pte) |
336 | { | |
c85994e4 DW |
337 | #ifdef CONFIG_64BIT |
338 | return pte->val & VTD_PAGE_MASK; | |
339 | #else | |
340 | /* Must have a full atomic 64-bit read */ | |
1a8bd481 | 341 | return __cmpxchg64(&pte->val, 0ULL, 0ULL) & VTD_PAGE_MASK; |
c85994e4 | 342 | #endif |
19c239ce MM |
343 | } |
344 | ||
19c239ce MM |
345 | static inline bool dma_pte_present(struct dma_pte *pte) |
346 | { | |
347 | return (pte->val & 3) != 0; | |
348 | } | |
622ba12a | 349 | |
4399c8bf AK |
350 | static inline bool dma_pte_superpage(struct dma_pte *pte) |
351 | { | |
c3c75eb7 | 352 | return (pte->val & DMA_PTE_LARGE_PAGE); |
4399c8bf AK |
353 | } |
354 | ||
75e6bf96 DW |
355 | static inline int first_pte_in_page(struct dma_pte *pte) |
356 | { | |
357 | return !((unsigned long)pte & ~VTD_PAGE_MASK); | |
358 | } | |
359 | ||
2c2e2c38 FY |
360 | /* |
361 | * This domain is a statically identity mapping domain. | |
362 | * 1. This domain creats a static 1:1 mapping to all usable memory. | |
363 | * 2. It maps to each iommu if successful. | |
364 | * 3. Each iommu mapps to this domain if successful. | |
365 | */ | |
19943b0e DW |
366 | static struct dmar_domain *si_domain; |
367 | static int hw_pass_through = 1; | |
2c2e2c38 | 368 | |
28ccce0d JR |
369 | /* |
370 | * Domain represents a virtual machine, more than one devices | |
1ce28feb WH |
371 | * across iommus may be owned in one domain, e.g. kvm guest. |
372 | */ | |
ab8dfe25 | 373 | #define DOMAIN_FLAG_VIRTUAL_MACHINE (1 << 0) |
1ce28feb | 374 | |
2c2e2c38 | 375 | /* si_domain contains mulitple devices */ |
ab8dfe25 | 376 | #define DOMAIN_FLAG_STATIC_IDENTITY (1 << 1) |
2c2e2c38 | 377 | |
29a27719 JR |
378 | #define for_each_domain_iommu(idx, domain) \ |
379 | for (idx = 0; idx < g_num_of_iommus; idx++) \ | |
380 | if (domain->iommu_refcnt[idx]) | |
381 | ||
99126f7c | 382 | struct dmar_domain { |
4c923d47 | 383 | int nid; /* node id */ |
29a27719 JR |
384 | |
385 | unsigned iommu_refcnt[DMAR_UNITS_SUPPORTED]; | |
386 | /* Refcount of devices per iommu */ | |
387 | ||
99126f7c | 388 | |
c0e8a6c8 JR |
389 | u16 iommu_did[DMAR_UNITS_SUPPORTED]; |
390 | /* Domain ids per IOMMU. Use u16 since | |
391 | * domain ids are 16 bit wide according | |
392 | * to VT-d spec, section 9.3 */ | |
99126f7c | 393 | |
0824c592 | 394 | bool has_iotlb_device; |
00a77deb | 395 | struct list_head devices; /* all devices' list */ |
99126f7c MM |
396 | struct iova_domain iovad; /* iova's that belong to this domain */ |
397 | ||
398 | struct dma_pte *pgd; /* virtual address */ | |
99126f7c MM |
399 | int gaw; /* max guest address width */ |
400 | ||
401 | /* adjusted guest address width, 0 is level 2 30-bit */ | |
402 | int agaw; | |
403 | ||
3b5410e7 | 404 | int flags; /* flags to find out type of domain */ |
8e604097 WH |
405 | |
406 | int iommu_coherency;/* indicate coherency of iommu access */ | |
58c610bd | 407 | int iommu_snooping; /* indicate snooping control feature*/ |
c7151a8d | 408 | int iommu_count; /* reference count of iommu */ |
6dd9a7c7 YS |
409 | int iommu_superpage;/* Level of superpages supported: |
410 | 0 == 4KiB (no superpages), 1 == 2MiB, | |
411 | 2 == 1GiB, 3 == 512GiB, 4 == 1TiB */ | |
fe40f1e0 | 412 | u64 max_addr; /* maximum mapped address */ |
00a77deb JR |
413 | |
414 | struct iommu_domain domain; /* generic domain data structure for | |
415 | iommu core */ | |
99126f7c MM |
416 | }; |
417 | ||
a647dacb MM |
418 | /* PCI domain-device relationship */ |
419 | struct device_domain_info { | |
420 | struct list_head link; /* link to domain siblings */ | |
421 | struct list_head global; /* link to global list */ | |
276dbf99 | 422 | u8 bus; /* PCI bus number */ |
a647dacb | 423 | u8 devfn; /* PCI devfn number */ |
eada1b22 | 424 | u16 pfsid; /* SRIOV physical function source ID */ |
b16d0cb9 DW |
425 | u8 pasid_supported:3; |
426 | u8 pasid_enabled:1; | |
427 | u8 pri_supported:1; | |
428 | u8 pri_enabled:1; | |
429 | u8 ats_supported:1; | |
430 | u8 ats_enabled:1; | |
431 | u8 ats_qdep; | |
0bcb3e28 | 432 | struct device *dev; /* it's NULL for PCIe-to-PCI bridge */ |
93a23a72 | 433 | struct intel_iommu *iommu; /* IOMMU used by this device */ |
a647dacb MM |
434 | struct dmar_domain *domain; /* pointer to domain */ |
435 | }; | |
436 | ||
b94e4117 JL |
437 | struct dmar_rmrr_unit { |
438 | struct list_head list; /* list of rmrr units */ | |
439 | struct acpi_dmar_header *hdr; /* ACPI header */ | |
440 | u64 base_address; /* reserved base address*/ | |
441 | u64 end_address; /* reserved end address */ | |
832bd858 | 442 | struct dmar_dev_scope *devices; /* target devices */ |
b94e4117 JL |
443 | int devices_cnt; /* target device count */ |
444 | }; | |
445 | ||
446 | struct dmar_atsr_unit { | |
447 | struct list_head list; /* list of ATSR units */ | |
448 | struct acpi_dmar_header *hdr; /* ACPI header */ | |
832bd858 | 449 | struct dmar_dev_scope *devices; /* target devices */ |
b94e4117 JL |
450 | int devices_cnt; /* target device count */ |
451 | u8 include_all:1; /* include all ports */ | |
452 | }; | |
453 | ||
454 | static LIST_HEAD(dmar_atsr_units); | |
455 | static LIST_HEAD(dmar_rmrr_units); | |
456 | ||
457 | #define for_each_rmrr_units(rmrr) \ | |
458 | list_for_each_entry(rmrr, &dmar_rmrr_units, list) | |
459 | ||
5e0d2a6f | 460 | static void flush_unmaps_timeout(unsigned long data); |
461 | ||
314f1dc1 | 462 | struct deferred_flush_entry { |
2aac6304 | 463 | unsigned long iova_pfn; |
769530e4 | 464 | unsigned long nrpages; |
314f1dc1 OP |
465 | struct dmar_domain *domain; |
466 | struct page *freelist; | |
467 | }; | |
5e0d2a6f | 468 | |
80b20dd8 | 469 | #define HIGH_WATER_MARK 250 |
314f1dc1 | 470 | struct deferred_flush_table { |
80b20dd8 | 471 | int next; |
314f1dc1 | 472 | struct deferred_flush_entry entries[HIGH_WATER_MARK]; |
80b20dd8 | 473 | }; |
474 | ||
aa473240 OP |
475 | struct deferred_flush_data { |
476 | spinlock_t lock; | |
477 | int timer_on; | |
478 | struct timer_list timer; | |
479 | long size; | |
480 | struct deferred_flush_table *tables; | |
80b20dd8 | 481 | }; |
482 | ||
aa473240 | 483 | DEFINE_PER_CPU(struct deferred_flush_data, deferred_flush); |
80b20dd8 | 484 | |
5e0d2a6f | 485 | /* bitmap for indexing intel_iommus */ |
5e0d2a6f | 486 | static int g_num_of_iommus; |
487 | ||
92d03cc8 | 488 | static void domain_exit(struct dmar_domain *domain); |
ba395927 | 489 | static void domain_remove_dev_info(struct dmar_domain *domain); |
e6de0f8d JR |
490 | static void dmar_remove_one_dev_info(struct dmar_domain *domain, |
491 | struct device *dev); | |
127c7615 | 492 | static void __dmar_remove_one_dev_info(struct device_domain_info *info); |
2452d9db JR |
493 | static void domain_context_clear(struct intel_iommu *iommu, |
494 | struct device *dev); | |
2a46ddf7 JL |
495 | static int domain_detach_iommu(struct dmar_domain *domain, |
496 | struct intel_iommu *iommu); | |
ba395927 | 497 | |
d3f13810 | 498 | #ifdef CONFIG_INTEL_IOMMU_DEFAULT_ON |
0cd5c3c8 KM |
499 | int dmar_disabled = 0; |
500 | #else | |
501 | int dmar_disabled = 1; | |
d3f13810 | 502 | #endif /*CONFIG_INTEL_IOMMU_DEFAULT_ON*/ |
0cd5c3c8 | 503 | |
8bc1f85c ED |
504 | int intel_iommu_enabled = 0; |
505 | EXPORT_SYMBOL_GPL(intel_iommu_enabled); | |
506 | ||
2d9e667e | 507 | static int dmar_map_gfx = 1; |
7d3b03ce | 508 | static int dmar_forcedac; |
5e0d2a6f | 509 | static int intel_iommu_strict; |
6dd9a7c7 | 510 | static int intel_iommu_superpage = 1; |
c83b2f20 | 511 | static int intel_iommu_ecs = 1; |
ae853ddb DW |
512 | static int intel_iommu_pasid28; |
513 | static int iommu_identity_mapping; | |
c83b2f20 | 514 | |
ae853ddb DW |
515 | #define IDENTMAP_ALL 1 |
516 | #define IDENTMAP_GFX 2 | |
517 | #define IDENTMAP_AZALIA 4 | |
c83b2f20 | 518 | |
d42fde70 DW |
519 | /* Broadwell and Skylake have broken ECS support — normal so-called "second |
520 | * level" translation of DMA requests-without-PASID doesn't actually happen | |
521 | * unless you also set the NESTE bit in an extended context-entry. Which of | |
522 | * course means that SVM doesn't work because it's trying to do nested | |
523 | * translation of the physical addresses it finds in the process page tables, | |
524 | * through the IOVA->phys mapping found in the "second level" page tables. | |
525 | * | |
526 | * The VT-d specification was retroactively changed to change the definition | |
527 | * of the capability bits and pretend that Broadwell/Skylake never happened... | |
528 | * but unfortunately the wrong bit was changed. It's ECS which is broken, but | |
529 | * for some reason it was the PASID capability bit which was redefined (from | |
530 | * bit 28 on BDW/SKL to bit 40 in future). | |
531 | * | |
532 | * So our test for ECS needs to eschew those implementations which set the old | |
533 | * PASID capabiity bit 28, since those are the ones on which ECS is broken. | |
534 | * Unless we are working around the 'pasid28' limitations, that is, by putting | |
535 | * the device into passthrough mode for normal DMA and thus masking the bug. | |
536 | */ | |
c83b2f20 | 537 | #define ecs_enabled(iommu) (intel_iommu_ecs && ecap_ecs(iommu->ecap) && \ |
d42fde70 DW |
538 | (intel_iommu_pasid28 || !ecap_broken_pasid(iommu->ecap))) |
539 | /* PASID support is thus enabled if ECS is enabled and *either* of the old | |
540 | * or new capability bits are set. */ | |
541 | #define pasid_enabled(iommu) (ecs_enabled(iommu) && \ | |
542 | (ecap_pasid(iommu->ecap) || ecap_broken_pasid(iommu->ecap))) | |
ba395927 | 543 | |
c0771df8 DW |
544 | int intel_iommu_gfx_mapped; |
545 | EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped); | |
546 | ||
ba395927 KA |
547 | #define DUMMY_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-1)) |
548 | static DEFINE_SPINLOCK(device_domain_lock); | |
549 | static LIST_HEAD(device_domain_list); | |
550 | ||
b22f6434 | 551 | static const struct iommu_ops intel_iommu_ops; |
a8bcbb0d | 552 | |
4158c2ec JR |
553 | static bool translation_pre_enabled(struct intel_iommu *iommu) |
554 | { | |
555 | return (iommu->flags & VTD_FLAG_TRANS_PRE_ENABLED); | |
556 | } | |
557 | ||
091d42e4 JR |
558 | static void clear_translation_pre_enabled(struct intel_iommu *iommu) |
559 | { | |
560 | iommu->flags &= ~VTD_FLAG_TRANS_PRE_ENABLED; | |
561 | } | |
562 | ||
4158c2ec JR |
563 | static void init_translation_status(struct intel_iommu *iommu) |
564 | { | |
565 | u32 gsts; | |
566 | ||
567 | gsts = readl(iommu->reg + DMAR_GSTS_REG); | |
568 | if (gsts & DMA_GSTS_TES) | |
569 | iommu->flags |= VTD_FLAG_TRANS_PRE_ENABLED; | |
570 | } | |
571 | ||
00a77deb JR |
572 | /* Convert generic 'struct iommu_domain to private struct dmar_domain */ |
573 | static struct dmar_domain *to_dmar_domain(struct iommu_domain *dom) | |
574 | { | |
575 | return container_of(dom, struct dmar_domain, domain); | |
576 | } | |
577 | ||
ba395927 KA |
578 | static int __init intel_iommu_setup(char *str) |
579 | { | |
580 | if (!str) | |
581 | return -EINVAL; | |
582 | while (*str) { | |
0cd5c3c8 KM |
583 | if (!strncmp(str, "on", 2)) { |
584 | dmar_disabled = 0; | |
9f10e5bf | 585 | pr_info("IOMMU enabled\n"); |
0cd5c3c8 | 586 | } else if (!strncmp(str, "off", 3)) { |
ba395927 | 587 | dmar_disabled = 1; |
9f10e5bf | 588 | pr_info("IOMMU disabled\n"); |
ba395927 KA |
589 | } else if (!strncmp(str, "igfx_off", 8)) { |
590 | dmar_map_gfx = 0; | |
9f10e5bf | 591 | pr_info("Disable GFX device mapping\n"); |
7d3b03ce | 592 | } else if (!strncmp(str, "forcedac", 8)) { |
9f10e5bf | 593 | pr_info("Forcing DAC for PCI devices\n"); |
7d3b03ce | 594 | dmar_forcedac = 1; |
5e0d2a6f | 595 | } else if (!strncmp(str, "strict", 6)) { |
9f10e5bf | 596 | pr_info("Disable batched IOTLB flush\n"); |
5e0d2a6f | 597 | intel_iommu_strict = 1; |
6dd9a7c7 | 598 | } else if (!strncmp(str, "sp_off", 6)) { |
9f10e5bf | 599 | pr_info("Disable supported super page\n"); |
6dd9a7c7 | 600 | intel_iommu_superpage = 0; |
c83b2f20 DW |
601 | } else if (!strncmp(str, "ecs_off", 7)) { |
602 | printk(KERN_INFO | |
603 | "Intel-IOMMU: disable extended context table support\n"); | |
604 | intel_iommu_ecs = 0; | |
ae853ddb DW |
605 | } else if (!strncmp(str, "pasid28", 7)) { |
606 | printk(KERN_INFO | |
607 | "Intel-IOMMU: enable pre-production PASID support\n"); | |
608 | intel_iommu_pasid28 = 1; | |
609 | iommu_identity_mapping |= IDENTMAP_GFX; | |
ba395927 KA |
610 | } |
611 | ||
612 | str += strcspn(str, ","); | |
613 | while (*str == ',') | |
614 | str++; | |
615 | } | |
616 | return 0; | |
617 | } | |
618 | __setup("intel_iommu=", intel_iommu_setup); | |
619 | ||
620 | static struct kmem_cache *iommu_domain_cache; | |
621 | static struct kmem_cache *iommu_devinfo_cache; | |
ba395927 | 622 | |
9452d5bf JR |
623 | static struct dmar_domain* get_iommu_domain(struct intel_iommu *iommu, u16 did) |
624 | { | |
8bf47816 JR |
625 | struct dmar_domain **domains; |
626 | int idx = did >> 8; | |
627 | ||
628 | domains = iommu->domains[idx]; | |
629 | if (!domains) | |
630 | return NULL; | |
631 | ||
632 | return domains[did & 0xff]; | |
9452d5bf JR |
633 | } |
634 | ||
635 | static void set_iommu_domain(struct intel_iommu *iommu, u16 did, | |
636 | struct dmar_domain *domain) | |
637 | { | |
8bf47816 JR |
638 | struct dmar_domain **domains; |
639 | int idx = did >> 8; | |
640 | ||
641 | if (!iommu->domains[idx]) { | |
642 | size_t size = 256 * sizeof(struct dmar_domain *); | |
643 | iommu->domains[idx] = kzalloc(size, GFP_ATOMIC); | |
644 | } | |
645 | ||
646 | domains = iommu->domains[idx]; | |
647 | if (WARN_ON(!domains)) | |
648 | return; | |
649 | else | |
650 | domains[did & 0xff] = domain; | |
9452d5bf JR |
651 | } |
652 | ||
4c923d47 | 653 | static inline void *alloc_pgtable_page(int node) |
eb3fa7cb | 654 | { |
4c923d47 SS |
655 | struct page *page; |
656 | void *vaddr = NULL; | |
eb3fa7cb | 657 | |
4c923d47 SS |
658 | page = alloc_pages_node(node, GFP_ATOMIC | __GFP_ZERO, 0); |
659 | if (page) | |
660 | vaddr = page_address(page); | |
eb3fa7cb | 661 | return vaddr; |
ba395927 KA |
662 | } |
663 | ||
664 | static inline void free_pgtable_page(void *vaddr) | |
665 | { | |
666 | free_page((unsigned long)vaddr); | |
667 | } | |
668 | ||
669 | static inline void *alloc_domain_mem(void) | |
670 | { | |
354bb65e | 671 | return kmem_cache_alloc(iommu_domain_cache, GFP_ATOMIC); |
ba395927 KA |
672 | } |
673 | ||
38717946 | 674 | static void free_domain_mem(void *vaddr) |
ba395927 KA |
675 | { |
676 | kmem_cache_free(iommu_domain_cache, vaddr); | |
677 | } | |
678 | ||
679 | static inline void * alloc_devinfo_mem(void) | |
680 | { | |
354bb65e | 681 | return kmem_cache_alloc(iommu_devinfo_cache, GFP_ATOMIC); |
ba395927 KA |
682 | } |
683 | ||
684 | static inline void free_devinfo_mem(void *vaddr) | |
685 | { | |
686 | kmem_cache_free(iommu_devinfo_cache, vaddr); | |
687 | } | |
688 | ||
ab8dfe25 JL |
689 | static inline int domain_type_is_vm(struct dmar_domain *domain) |
690 | { | |
691 | return domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE; | |
692 | } | |
693 | ||
28ccce0d JR |
694 | static inline int domain_type_is_si(struct dmar_domain *domain) |
695 | { | |
696 | return domain->flags & DOMAIN_FLAG_STATIC_IDENTITY; | |
697 | } | |
698 | ||
ab8dfe25 JL |
699 | static inline int domain_type_is_vm_or_si(struct dmar_domain *domain) |
700 | { | |
701 | return domain->flags & (DOMAIN_FLAG_VIRTUAL_MACHINE | | |
702 | DOMAIN_FLAG_STATIC_IDENTITY); | |
703 | } | |
1b573683 | 704 | |
162d1b10 JL |
705 | static inline int domain_pfn_supported(struct dmar_domain *domain, |
706 | unsigned long pfn) | |
707 | { | |
708 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; | |
709 | ||
710 | return !(addr_width < BITS_PER_LONG && pfn >> addr_width); | |
711 | } | |
712 | ||
4ed0d3e6 | 713 | static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw) |
1b573683 WH |
714 | { |
715 | unsigned long sagaw; | |
716 | int agaw = -1; | |
717 | ||
718 | sagaw = cap_sagaw(iommu->cap); | |
4ed0d3e6 | 719 | for (agaw = width_to_agaw(max_gaw); |
1b573683 WH |
720 | agaw >= 0; agaw--) { |
721 | if (test_bit(agaw, &sagaw)) | |
722 | break; | |
723 | } | |
724 | ||
725 | return agaw; | |
726 | } | |
727 | ||
4ed0d3e6 FY |
728 | /* |
729 | * Calculate max SAGAW for each iommu. | |
730 | */ | |
731 | int iommu_calculate_max_sagaw(struct intel_iommu *iommu) | |
732 | { | |
733 | return __iommu_calculate_agaw(iommu, MAX_AGAW_WIDTH); | |
734 | } | |
735 | ||
736 | /* | |
737 | * calculate agaw for each iommu. | |
738 | * "SAGAW" may be different across iommus, use a default agaw, and | |
739 | * get a supported less agaw for iommus that don't support the default agaw. | |
740 | */ | |
741 | int iommu_calculate_agaw(struct intel_iommu *iommu) | |
742 | { | |
743 | return __iommu_calculate_agaw(iommu, DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
744 | } | |
745 | ||
2c2e2c38 | 746 | /* This functionin only returns single iommu in a domain */ |
8c11e798 WH |
747 | static struct intel_iommu *domain_get_iommu(struct dmar_domain *domain) |
748 | { | |
749 | int iommu_id; | |
750 | ||
2c2e2c38 | 751 | /* si_domain and vm domain should not get here. */ |
ab8dfe25 | 752 | BUG_ON(domain_type_is_vm_or_si(domain)); |
29a27719 JR |
753 | for_each_domain_iommu(iommu_id, domain) |
754 | break; | |
755 | ||
8c11e798 WH |
756 | if (iommu_id < 0 || iommu_id >= g_num_of_iommus) |
757 | return NULL; | |
758 | ||
759 | return g_iommus[iommu_id]; | |
760 | } | |
761 | ||
8e604097 WH |
762 | static void domain_update_iommu_coherency(struct dmar_domain *domain) |
763 | { | |
d0501960 DW |
764 | struct dmar_drhd_unit *drhd; |
765 | struct intel_iommu *iommu; | |
2f119c78 QL |
766 | bool found = false; |
767 | int i; | |
2e12bc29 | 768 | |
d0501960 | 769 | domain->iommu_coherency = 1; |
8e604097 | 770 | |
29a27719 | 771 | for_each_domain_iommu(i, domain) { |
2f119c78 | 772 | found = true; |
8e604097 WH |
773 | if (!ecap_coherent(g_iommus[i]->ecap)) { |
774 | domain->iommu_coherency = 0; | |
775 | break; | |
776 | } | |
8e604097 | 777 | } |
d0501960 DW |
778 | if (found) |
779 | return; | |
780 | ||
781 | /* No hardware attached; use lowest common denominator */ | |
782 | rcu_read_lock(); | |
783 | for_each_active_iommu(iommu, drhd) { | |
784 | if (!ecap_coherent(iommu->ecap)) { | |
785 | domain->iommu_coherency = 0; | |
786 | break; | |
787 | } | |
788 | } | |
789 | rcu_read_unlock(); | |
8e604097 WH |
790 | } |
791 | ||
161f6934 | 792 | static int domain_update_iommu_snooping(struct intel_iommu *skip) |
58c610bd | 793 | { |
161f6934 JL |
794 | struct dmar_drhd_unit *drhd; |
795 | struct intel_iommu *iommu; | |
796 | int ret = 1; | |
58c610bd | 797 | |
161f6934 JL |
798 | rcu_read_lock(); |
799 | for_each_active_iommu(iommu, drhd) { | |
800 | if (iommu != skip) { | |
801 | if (!ecap_sc_support(iommu->ecap)) { | |
802 | ret = 0; | |
803 | break; | |
804 | } | |
58c610bd | 805 | } |
58c610bd | 806 | } |
161f6934 JL |
807 | rcu_read_unlock(); |
808 | ||
809 | return ret; | |
58c610bd SY |
810 | } |
811 | ||
161f6934 | 812 | static int domain_update_iommu_superpage(struct intel_iommu *skip) |
6dd9a7c7 | 813 | { |
8140a95d | 814 | struct dmar_drhd_unit *drhd; |
161f6934 | 815 | struct intel_iommu *iommu; |
8140a95d | 816 | int mask = 0xf; |
6dd9a7c7 YS |
817 | |
818 | if (!intel_iommu_superpage) { | |
161f6934 | 819 | return 0; |
6dd9a7c7 YS |
820 | } |
821 | ||
8140a95d | 822 | /* set iommu_superpage to the smallest common denominator */ |
0e242612 | 823 | rcu_read_lock(); |
8140a95d | 824 | for_each_active_iommu(iommu, drhd) { |
161f6934 JL |
825 | if (iommu != skip) { |
826 | mask &= cap_super_page_val(iommu->cap); | |
827 | if (!mask) | |
828 | break; | |
6dd9a7c7 YS |
829 | } |
830 | } | |
0e242612 JL |
831 | rcu_read_unlock(); |
832 | ||
161f6934 | 833 | return fls(mask); |
6dd9a7c7 YS |
834 | } |
835 | ||
58c610bd SY |
836 | /* Some capabilities may be different across iommus */ |
837 | static void domain_update_iommu_cap(struct dmar_domain *domain) | |
838 | { | |
839 | domain_update_iommu_coherency(domain); | |
161f6934 JL |
840 | domain->iommu_snooping = domain_update_iommu_snooping(NULL); |
841 | domain->iommu_superpage = domain_update_iommu_superpage(NULL); | |
58c610bd SY |
842 | } |
843 | ||
03ecc32c DW |
844 | static inline struct context_entry *iommu_context_addr(struct intel_iommu *iommu, |
845 | u8 bus, u8 devfn, int alloc) | |
846 | { | |
847 | struct root_entry *root = &iommu->root_entry[bus]; | |
848 | struct context_entry *context; | |
849 | u64 *entry; | |
850 | ||
4df4eab1 | 851 | entry = &root->lo; |
c83b2f20 | 852 | if (ecs_enabled(iommu)) { |
03ecc32c DW |
853 | if (devfn >= 0x80) { |
854 | devfn -= 0x80; | |
855 | entry = &root->hi; | |
856 | } | |
857 | devfn *= 2; | |
858 | } | |
03ecc32c DW |
859 | if (*entry & 1) |
860 | context = phys_to_virt(*entry & VTD_PAGE_MASK); | |
861 | else { | |
862 | unsigned long phy_addr; | |
863 | if (!alloc) | |
864 | return NULL; | |
865 | ||
866 | context = alloc_pgtable_page(iommu->node); | |
867 | if (!context) | |
868 | return NULL; | |
869 | ||
870 | __iommu_flush_cache(iommu, (void *)context, CONTEXT_SIZE); | |
871 | phy_addr = virt_to_phys((void *)context); | |
872 | *entry = phy_addr | 1; | |
873 | __iommu_flush_cache(iommu, entry, sizeof(*entry)); | |
874 | } | |
875 | return &context[devfn]; | |
876 | } | |
877 | ||
4ed6a540 DW |
878 | static int iommu_dummy(struct device *dev) |
879 | { | |
880 | return dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO; | |
881 | } | |
882 | ||
156baca8 | 883 | static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn) |
c7151a8d WH |
884 | { |
885 | struct dmar_drhd_unit *drhd = NULL; | |
b683b230 | 886 | struct intel_iommu *iommu; |
156baca8 DW |
887 | struct device *tmp; |
888 | struct pci_dev *ptmp, *pdev = NULL; | |
aa4d066a | 889 | u16 segment = 0; |
c7151a8d WH |
890 | int i; |
891 | ||
4ed6a540 DW |
892 | if (iommu_dummy(dev)) |
893 | return NULL; | |
894 | ||
156baca8 | 895 | if (dev_is_pci(dev)) { |
1c387188 AR |
896 | struct pci_dev *pf_pdev; |
897 | ||
156baca8 | 898 | pdev = to_pci_dev(dev); |
1c387188 AR |
899 | /* VFs aren't listed in scope tables; we need to look up |
900 | * the PF instead to find the IOMMU. */ | |
901 | pf_pdev = pci_physfn(pdev); | |
902 | dev = &pf_pdev->dev; | |
156baca8 | 903 | segment = pci_domain_nr(pdev->bus); |
ca5b74d2 | 904 | } else if (has_acpi_companion(dev)) |
156baca8 DW |
905 | dev = &ACPI_COMPANION(dev)->dev; |
906 | ||
0e242612 | 907 | rcu_read_lock(); |
b683b230 | 908 | for_each_active_iommu(iommu, drhd) { |
156baca8 | 909 | if (pdev && segment != drhd->segment) |
276dbf99 | 910 | continue; |
c7151a8d | 911 | |
b683b230 | 912 | for_each_active_dev_scope(drhd->devices, |
156baca8 DW |
913 | drhd->devices_cnt, i, tmp) { |
914 | if (tmp == dev) { | |
1c387188 AR |
915 | /* For a VF use its original BDF# not that of the PF |
916 | * which we used for the IOMMU lookup. Strictly speaking | |
917 | * we could do this for all PCI devices; we only need to | |
918 | * get the BDF# from the scope table for ACPI matches. */ | |
352c0214 | 919 | if (pdev && pdev->is_virtfn) |
1c387188 AR |
920 | goto got_pdev; |
921 | ||
156baca8 DW |
922 | *bus = drhd->devices[i].bus; |
923 | *devfn = drhd->devices[i].devfn; | |
b683b230 | 924 | goto out; |
156baca8 DW |
925 | } |
926 | ||
927 | if (!pdev || !dev_is_pci(tmp)) | |
928 | continue; | |
929 | ||
930 | ptmp = to_pci_dev(tmp); | |
931 | if (ptmp->subordinate && | |
932 | ptmp->subordinate->number <= pdev->bus->number && | |
933 | ptmp->subordinate->busn_res.end >= pdev->bus->number) | |
934 | goto got_pdev; | |
924b6231 | 935 | } |
c7151a8d | 936 | |
156baca8 DW |
937 | if (pdev && drhd->include_all) { |
938 | got_pdev: | |
939 | *bus = pdev->bus->number; | |
940 | *devfn = pdev->devfn; | |
b683b230 | 941 | goto out; |
156baca8 | 942 | } |
c7151a8d | 943 | } |
b683b230 | 944 | iommu = NULL; |
156baca8 | 945 | out: |
0e242612 | 946 | rcu_read_unlock(); |
c7151a8d | 947 | |
b683b230 | 948 | return iommu; |
c7151a8d WH |
949 | } |
950 | ||
5331fe6f WH |
951 | static void domain_flush_cache(struct dmar_domain *domain, |
952 | void *addr, int size) | |
953 | { | |
954 | if (!domain->iommu_coherency) | |
955 | clflush_cache_range(addr, size); | |
956 | } | |
957 | ||
ba395927 KA |
958 | static int device_context_mapped(struct intel_iommu *iommu, u8 bus, u8 devfn) |
959 | { | |
ba395927 | 960 | struct context_entry *context; |
03ecc32c | 961 | int ret = 0; |
ba395927 KA |
962 | unsigned long flags; |
963 | ||
964 | spin_lock_irqsave(&iommu->lock, flags); | |
03ecc32c DW |
965 | context = iommu_context_addr(iommu, bus, devfn, 0); |
966 | if (context) | |
967 | ret = context_present(context); | |
ba395927 KA |
968 | spin_unlock_irqrestore(&iommu->lock, flags); |
969 | return ret; | |
970 | } | |
971 | ||
972 | static void clear_context_table(struct intel_iommu *iommu, u8 bus, u8 devfn) | |
973 | { | |
ba395927 KA |
974 | struct context_entry *context; |
975 | unsigned long flags; | |
976 | ||
977 | spin_lock_irqsave(&iommu->lock, flags); | |
03ecc32c | 978 | context = iommu_context_addr(iommu, bus, devfn, 0); |
ba395927 | 979 | if (context) { |
03ecc32c DW |
980 | context_clear_entry(context); |
981 | __iommu_flush_cache(iommu, context, sizeof(*context)); | |
ba395927 KA |
982 | } |
983 | spin_unlock_irqrestore(&iommu->lock, flags); | |
984 | } | |
985 | ||
986 | static void free_context_table(struct intel_iommu *iommu) | |
987 | { | |
ba395927 KA |
988 | int i; |
989 | unsigned long flags; | |
990 | struct context_entry *context; | |
991 | ||
992 | spin_lock_irqsave(&iommu->lock, flags); | |
993 | if (!iommu->root_entry) { | |
994 | goto out; | |
995 | } | |
996 | for (i = 0; i < ROOT_ENTRY_NR; i++) { | |
03ecc32c | 997 | context = iommu_context_addr(iommu, i, 0, 0); |
ba395927 KA |
998 | if (context) |
999 | free_pgtable_page(context); | |
03ecc32c | 1000 | |
c83b2f20 | 1001 | if (!ecs_enabled(iommu)) |
03ecc32c DW |
1002 | continue; |
1003 | ||
1004 | context = iommu_context_addr(iommu, i, 0x80, 0); | |
1005 | if (context) | |
1006 | free_pgtable_page(context); | |
1007 | ||
ba395927 KA |
1008 | } |
1009 | free_pgtable_page(iommu->root_entry); | |
1010 | iommu->root_entry = NULL; | |
1011 | out: | |
1012 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1013 | } | |
1014 | ||
b026fd28 | 1015 | static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, |
5cf0a76f | 1016 | unsigned long pfn, int *target_level) |
ba395927 | 1017 | { |
ba395927 KA |
1018 | struct dma_pte *parent, *pte = NULL; |
1019 | int level = agaw_to_level(domain->agaw); | |
4399c8bf | 1020 | int offset; |
ba395927 KA |
1021 | |
1022 | BUG_ON(!domain->pgd); | |
f9423606 | 1023 | |
162d1b10 | 1024 | if (!domain_pfn_supported(domain, pfn)) |
f9423606 JS |
1025 | /* Address beyond IOMMU's addressing capabilities. */ |
1026 | return NULL; | |
1027 | ||
ba395927 KA |
1028 | parent = domain->pgd; |
1029 | ||
5cf0a76f | 1030 | while (1) { |
ba395927 KA |
1031 | void *tmp_page; |
1032 | ||
b026fd28 | 1033 | offset = pfn_level_offset(pfn, level); |
ba395927 | 1034 | pte = &parent[offset]; |
5cf0a76f | 1035 | if (!*target_level && (dma_pte_superpage(pte) || !dma_pte_present(pte))) |
6dd9a7c7 | 1036 | break; |
5cf0a76f | 1037 | if (level == *target_level) |
ba395927 KA |
1038 | break; |
1039 | ||
19c239ce | 1040 | if (!dma_pte_present(pte)) { |
c85994e4 DW |
1041 | uint64_t pteval; |
1042 | ||
4c923d47 | 1043 | tmp_page = alloc_pgtable_page(domain->nid); |
ba395927 | 1044 | |
206a73c1 | 1045 | if (!tmp_page) |
ba395927 | 1046 | return NULL; |
206a73c1 | 1047 | |
c85994e4 | 1048 | domain_flush_cache(domain, tmp_page, VTD_PAGE_SIZE); |
64de5af0 | 1049 | pteval = ((uint64_t)virt_to_dma_pfn(tmp_page) << VTD_PAGE_SHIFT) | DMA_PTE_READ | DMA_PTE_WRITE; |
effad4b5 | 1050 | if (cmpxchg64(&pte->val, 0ULL, pteval)) |
c85994e4 DW |
1051 | /* Someone else set it while we were thinking; use theirs. */ |
1052 | free_pgtable_page(tmp_page); | |
effad4b5 | 1053 | else |
c85994e4 | 1054 | domain_flush_cache(domain, pte, sizeof(*pte)); |
ba395927 | 1055 | } |
5cf0a76f DW |
1056 | if (level == 1) |
1057 | break; | |
1058 | ||
19c239ce | 1059 | parent = phys_to_virt(dma_pte_addr(pte)); |
ba395927 KA |
1060 | level--; |
1061 | } | |
1062 | ||
5cf0a76f DW |
1063 | if (!*target_level) |
1064 | *target_level = level; | |
1065 | ||
ba395927 KA |
1066 | return pte; |
1067 | } | |
1068 | ||
6dd9a7c7 | 1069 | |
ba395927 | 1070 | /* return address's pte at specific level */ |
90dcfb5e DW |
1071 | static struct dma_pte *dma_pfn_level_pte(struct dmar_domain *domain, |
1072 | unsigned long pfn, | |
6dd9a7c7 | 1073 | int level, int *large_page) |
ba395927 KA |
1074 | { |
1075 | struct dma_pte *parent, *pte = NULL; | |
1076 | int total = agaw_to_level(domain->agaw); | |
1077 | int offset; | |
1078 | ||
1079 | parent = domain->pgd; | |
1080 | while (level <= total) { | |
90dcfb5e | 1081 | offset = pfn_level_offset(pfn, total); |
ba395927 KA |
1082 | pte = &parent[offset]; |
1083 | if (level == total) | |
1084 | return pte; | |
1085 | ||
6dd9a7c7 YS |
1086 | if (!dma_pte_present(pte)) { |
1087 | *large_page = total; | |
ba395927 | 1088 | break; |
6dd9a7c7 YS |
1089 | } |
1090 | ||
e16922af | 1091 | if (dma_pte_superpage(pte)) { |
6dd9a7c7 YS |
1092 | *large_page = total; |
1093 | return pte; | |
1094 | } | |
1095 | ||
19c239ce | 1096 | parent = phys_to_virt(dma_pte_addr(pte)); |
ba395927 KA |
1097 | total--; |
1098 | } | |
1099 | return NULL; | |
1100 | } | |
1101 | ||
ba395927 | 1102 | /* clear last level pte, a tlb flush should be followed */ |
5cf0a76f | 1103 | static void dma_pte_clear_range(struct dmar_domain *domain, |
595badf5 DW |
1104 | unsigned long start_pfn, |
1105 | unsigned long last_pfn) | |
ba395927 | 1106 | { |
6dd9a7c7 | 1107 | unsigned int large_page = 1; |
310a5ab9 | 1108 | struct dma_pte *first_pte, *pte; |
66eae846 | 1109 | |
162d1b10 JL |
1110 | BUG_ON(!domain_pfn_supported(domain, start_pfn)); |
1111 | BUG_ON(!domain_pfn_supported(domain, last_pfn)); | |
59c36286 | 1112 | BUG_ON(start_pfn > last_pfn); |
ba395927 | 1113 | |
04b18e65 | 1114 | /* we don't need lock here; nobody else touches the iova range */ |
59c36286 | 1115 | do { |
6dd9a7c7 YS |
1116 | large_page = 1; |
1117 | first_pte = pte = dma_pfn_level_pte(domain, start_pfn, 1, &large_page); | |
310a5ab9 | 1118 | if (!pte) { |
6dd9a7c7 | 1119 | start_pfn = align_to_level(start_pfn + 1, large_page + 1); |
310a5ab9 DW |
1120 | continue; |
1121 | } | |
6dd9a7c7 | 1122 | do { |
310a5ab9 | 1123 | dma_clear_pte(pte); |
6dd9a7c7 | 1124 | start_pfn += lvl_to_nr_pages(large_page); |
310a5ab9 | 1125 | pte++; |
75e6bf96 DW |
1126 | } while (start_pfn <= last_pfn && !first_pte_in_page(pte)); |
1127 | ||
310a5ab9 DW |
1128 | domain_flush_cache(domain, first_pte, |
1129 | (void *)pte - (void *)first_pte); | |
59c36286 DW |
1130 | |
1131 | } while (start_pfn && start_pfn <= last_pfn); | |
ba395927 KA |
1132 | } |
1133 | ||
3269ee0b AW |
1134 | static void dma_pte_free_level(struct dmar_domain *domain, int level, |
1135 | struct dma_pte *pte, unsigned long pfn, | |
1136 | unsigned long start_pfn, unsigned long last_pfn) | |
1137 | { | |
1138 | pfn = max(start_pfn, pfn); | |
1139 | pte = &pte[pfn_level_offset(pfn, level)]; | |
1140 | ||
1141 | do { | |
1142 | unsigned long level_pfn; | |
1143 | struct dma_pte *level_pte; | |
1144 | ||
1145 | if (!dma_pte_present(pte) || dma_pte_superpage(pte)) | |
1146 | goto next; | |
1147 | ||
c19bfc67 | 1148 | level_pfn = pfn & level_mask(level); |
3269ee0b AW |
1149 | level_pte = phys_to_virt(dma_pte_addr(pte)); |
1150 | ||
1151 | if (level > 2) | |
1152 | dma_pte_free_level(domain, level - 1, level_pte, | |
1153 | level_pfn, start_pfn, last_pfn); | |
1154 | ||
1155 | /* If range covers entire pagetable, free it */ | |
1156 | if (!(start_pfn > level_pfn || | |
08336fd2 | 1157 | last_pfn < level_pfn + level_size(level) - 1)) { |
3269ee0b AW |
1158 | dma_clear_pte(pte); |
1159 | domain_flush_cache(domain, pte, sizeof(*pte)); | |
1160 | free_pgtable_page(level_pte); | |
1161 | } | |
1162 | next: | |
1163 | pfn += level_size(level); | |
1164 | } while (!first_pte_in_page(++pte) && pfn <= last_pfn); | |
1165 | } | |
1166 | ||
3d1a2442 | 1167 | /* clear last level (leaf) ptes and free page table pages. */ |
ba395927 | 1168 | static void dma_pte_free_pagetable(struct dmar_domain *domain, |
d794dc9b DW |
1169 | unsigned long start_pfn, |
1170 | unsigned long last_pfn) | |
ba395927 | 1171 | { |
162d1b10 JL |
1172 | BUG_ON(!domain_pfn_supported(domain, start_pfn)); |
1173 | BUG_ON(!domain_pfn_supported(domain, last_pfn)); | |
59c36286 | 1174 | BUG_ON(start_pfn > last_pfn); |
ba395927 | 1175 | |
d41a4adb JL |
1176 | dma_pte_clear_range(domain, start_pfn, last_pfn); |
1177 | ||
f3a0a52f | 1178 | /* We don't need lock here; nobody else touches the iova range */ |
3269ee0b AW |
1179 | dma_pte_free_level(domain, agaw_to_level(domain->agaw), |
1180 | domain->pgd, 0, start_pfn, last_pfn); | |
6660c63a | 1181 | |
ba395927 | 1182 | /* free pgd */ |
d794dc9b | 1183 | if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) { |
ba395927 KA |
1184 | free_pgtable_page(domain->pgd); |
1185 | domain->pgd = NULL; | |
1186 | } | |
1187 | } | |
1188 | ||
ea8ea460 DW |
1189 | /* When a page at a given level is being unlinked from its parent, we don't |
1190 | need to *modify* it at all. All we need to do is make a list of all the | |
1191 | pages which can be freed just as soon as we've flushed the IOTLB and we | |
1192 | know the hardware page-walk will no longer touch them. | |
1193 | The 'pte' argument is the *parent* PTE, pointing to the page that is to | |
1194 | be freed. */ | |
1195 | static struct page *dma_pte_list_pagetables(struct dmar_domain *domain, | |
1196 | int level, struct dma_pte *pte, | |
1197 | struct page *freelist) | |
1198 | { | |
1199 | struct page *pg; | |
1200 | ||
1201 | pg = pfn_to_page(dma_pte_addr(pte) >> PAGE_SHIFT); | |
1202 | pg->freelist = freelist; | |
1203 | freelist = pg; | |
1204 | ||
1205 | if (level == 1) | |
1206 | return freelist; | |
1207 | ||
adeb2590 JL |
1208 | pte = page_address(pg); |
1209 | do { | |
ea8ea460 DW |
1210 | if (dma_pte_present(pte) && !dma_pte_superpage(pte)) |
1211 | freelist = dma_pte_list_pagetables(domain, level - 1, | |
1212 | pte, freelist); | |
adeb2590 JL |
1213 | pte++; |
1214 | } while (!first_pte_in_page(pte)); | |
ea8ea460 DW |
1215 | |
1216 | return freelist; | |
1217 | } | |
1218 | ||
1219 | static struct page *dma_pte_clear_level(struct dmar_domain *domain, int level, | |
1220 | struct dma_pte *pte, unsigned long pfn, | |
1221 | unsigned long start_pfn, | |
1222 | unsigned long last_pfn, | |
1223 | struct page *freelist) | |
1224 | { | |
1225 | struct dma_pte *first_pte = NULL, *last_pte = NULL; | |
1226 | ||
1227 | pfn = max(start_pfn, pfn); | |
1228 | pte = &pte[pfn_level_offset(pfn, level)]; | |
1229 | ||
1230 | do { | |
1231 | unsigned long level_pfn; | |
1232 | ||
1233 | if (!dma_pte_present(pte)) | |
1234 | goto next; | |
1235 | ||
1236 | level_pfn = pfn & level_mask(level); | |
1237 | ||
1238 | /* If range covers entire pagetable, free it */ | |
1239 | if (start_pfn <= level_pfn && | |
1240 | last_pfn >= level_pfn + level_size(level) - 1) { | |
1241 | /* These suborbinate page tables are going away entirely. Don't | |
1242 | bother to clear them; we're just going to *free* them. */ | |
1243 | if (level > 1 && !dma_pte_superpage(pte)) | |
1244 | freelist = dma_pte_list_pagetables(domain, level - 1, pte, freelist); | |
1245 | ||
1246 | dma_clear_pte(pte); | |
1247 | if (!first_pte) | |
1248 | first_pte = pte; | |
1249 | last_pte = pte; | |
1250 | } else if (level > 1) { | |
1251 | /* Recurse down into a level that isn't *entirely* obsolete */ | |
1252 | freelist = dma_pte_clear_level(domain, level - 1, | |
1253 | phys_to_virt(dma_pte_addr(pte)), | |
1254 | level_pfn, start_pfn, last_pfn, | |
1255 | freelist); | |
1256 | } | |
1257 | next: | |
1258 | pfn += level_size(level); | |
1259 | } while (!first_pte_in_page(++pte) && pfn <= last_pfn); | |
1260 | ||
1261 | if (first_pte) | |
1262 | domain_flush_cache(domain, first_pte, | |
1263 | (void *)++last_pte - (void *)first_pte); | |
1264 | ||
1265 | return freelist; | |
1266 | } | |
1267 | ||
1268 | /* We can't just free the pages because the IOMMU may still be walking | |
1269 | the page tables, and may have cached the intermediate levels. The | |
1270 | pages can only be freed after the IOTLB flush has been done. */ | |
b690420a JR |
1271 | static struct page *domain_unmap(struct dmar_domain *domain, |
1272 | unsigned long start_pfn, | |
1273 | unsigned long last_pfn) | |
ea8ea460 | 1274 | { |
ea8ea460 DW |
1275 | struct page *freelist = NULL; |
1276 | ||
162d1b10 JL |
1277 | BUG_ON(!domain_pfn_supported(domain, start_pfn)); |
1278 | BUG_ON(!domain_pfn_supported(domain, last_pfn)); | |
ea8ea460 DW |
1279 | BUG_ON(start_pfn > last_pfn); |
1280 | ||
1281 | /* we don't need lock here; nobody else touches the iova range */ | |
1282 | freelist = dma_pte_clear_level(domain, agaw_to_level(domain->agaw), | |
1283 | domain->pgd, 0, start_pfn, last_pfn, NULL); | |
1284 | ||
1285 | /* free pgd */ | |
1286 | if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) { | |
1287 | struct page *pgd_page = virt_to_page(domain->pgd); | |
1288 | pgd_page->freelist = freelist; | |
1289 | freelist = pgd_page; | |
1290 | ||
1291 | domain->pgd = NULL; | |
1292 | } | |
1293 | ||
1294 | return freelist; | |
1295 | } | |
1296 | ||
b690420a | 1297 | static void dma_free_pagelist(struct page *freelist) |
ea8ea460 DW |
1298 | { |
1299 | struct page *pg; | |
1300 | ||
1301 | while ((pg = freelist)) { | |
1302 | freelist = pg->freelist; | |
1303 | free_pgtable_page(page_address(pg)); | |
1304 | } | |
1305 | } | |
1306 | ||
ba395927 KA |
1307 | /* iommu handling */ |
1308 | static int iommu_alloc_root_entry(struct intel_iommu *iommu) | |
1309 | { | |
1310 | struct root_entry *root; | |
1311 | unsigned long flags; | |
1312 | ||
4c923d47 | 1313 | root = (struct root_entry *)alloc_pgtable_page(iommu->node); |
ffebeb46 | 1314 | if (!root) { |
9f10e5bf | 1315 | pr_err("Allocating root entry for %s failed\n", |
ffebeb46 | 1316 | iommu->name); |
ba395927 | 1317 | return -ENOMEM; |
ffebeb46 | 1318 | } |
ba395927 | 1319 | |
5b6985ce | 1320 | __iommu_flush_cache(iommu, root, ROOT_SIZE); |
ba395927 KA |
1321 | |
1322 | spin_lock_irqsave(&iommu->lock, flags); | |
1323 | iommu->root_entry = root; | |
1324 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1325 | ||
1326 | return 0; | |
1327 | } | |
1328 | ||
ba395927 KA |
1329 | static void iommu_set_root_entry(struct intel_iommu *iommu) |
1330 | { | |
03ecc32c | 1331 | u64 addr; |
c416daa9 | 1332 | u32 sts; |
ba395927 KA |
1333 | unsigned long flag; |
1334 | ||
03ecc32c | 1335 | addr = virt_to_phys(iommu->root_entry); |
c83b2f20 | 1336 | if (ecs_enabled(iommu)) |
03ecc32c | 1337 | addr |= DMA_RTADDR_RTT; |
ba395927 | 1338 | |
1f5b3c3f | 1339 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
03ecc32c | 1340 | dmar_writeq(iommu->reg + DMAR_RTADDR_REG, addr); |
ba395927 | 1341 | |
c416daa9 | 1342 | writel(iommu->gcmd | DMA_GCMD_SRTP, iommu->reg + DMAR_GCMD_REG); |
ba395927 KA |
1343 | |
1344 | /* Make sure hardware complete it */ | |
1345 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1346 | readl, (sts & DMA_GSTS_RTPS), sts); |
ba395927 | 1347 | |
1f5b3c3f | 1348 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1349 | } |
1350 | ||
1351 | static void iommu_flush_write_buffer(struct intel_iommu *iommu) | |
1352 | { | |
1353 | u32 val; | |
1354 | unsigned long flag; | |
1355 | ||
9af88143 | 1356 | if (!rwbf_quirk && !cap_rwbf(iommu->cap)) |
ba395927 | 1357 | return; |
ba395927 | 1358 | |
1f5b3c3f | 1359 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
462b60f6 | 1360 | writel(iommu->gcmd | DMA_GCMD_WBF, iommu->reg + DMAR_GCMD_REG); |
ba395927 KA |
1361 | |
1362 | /* Make sure hardware complete it */ | |
1363 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1364 | readl, (!(val & DMA_GSTS_WBFS)), val); |
ba395927 | 1365 | |
1f5b3c3f | 1366 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1367 | } |
1368 | ||
1369 | /* return value determine if we need a write buffer flush */ | |
4c25a2c1 DW |
1370 | static void __iommu_flush_context(struct intel_iommu *iommu, |
1371 | u16 did, u16 source_id, u8 function_mask, | |
1372 | u64 type) | |
ba395927 KA |
1373 | { |
1374 | u64 val = 0; | |
1375 | unsigned long flag; | |
1376 | ||
ba395927 KA |
1377 | switch (type) { |
1378 | case DMA_CCMD_GLOBAL_INVL: | |
1379 | val = DMA_CCMD_GLOBAL_INVL; | |
1380 | break; | |
1381 | case DMA_CCMD_DOMAIN_INVL: | |
1382 | val = DMA_CCMD_DOMAIN_INVL|DMA_CCMD_DID(did); | |
1383 | break; | |
1384 | case DMA_CCMD_DEVICE_INVL: | |
1385 | val = DMA_CCMD_DEVICE_INVL|DMA_CCMD_DID(did) | |
1386 | | DMA_CCMD_SID(source_id) | DMA_CCMD_FM(function_mask); | |
1387 | break; | |
1388 | default: | |
1389 | BUG(); | |
1390 | } | |
1391 | val |= DMA_CCMD_ICC; | |
1392 | ||
1f5b3c3f | 1393 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
1394 | dmar_writeq(iommu->reg + DMAR_CCMD_REG, val); |
1395 | ||
1396 | /* Make sure hardware complete it */ | |
1397 | IOMMU_WAIT_OP(iommu, DMAR_CCMD_REG, | |
1398 | dmar_readq, (!(val & DMA_CCMD_ICC)), val); | |
1399 | ||
1f5b3c3f | 1400 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1401 | } |
1402 | ||
ba395927 | 1403 | /* return value determine if we need a write buffer flush */ |
1f0ef2aa DW |
1404 | static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, |
1405 | u64 addr, unsigned int size_order, u64 type) | |
ba395927 KA |
1406 | { |
1407 | int tlb_offset = ecap_iotlb_offset(iommu->ecap); | |
1408 | u64 val = 0, val_iva = 0; | |
1409 | unsigned long flag; | |
1410 | ||
ba395927 KA |
1411 | switch (type) { |
1412 | case DMA_TLB_GLOBAL_FLUSH: | |
1413 | /* global flush doesn't need set IVA_REG */ | |
1414 | val = DMA_TLB_GLOBAL_FLUSH|DMA_TLB_IVT; | |
1415 | break; | |
1416 | case DMA_TLB_DSI_FLUSH: | |
1417 | val = DMA_TLB_DSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); | |
1418 | break; | |
1419 | case DMA_TLB_PSI_FLUSH: | |
1420 | val = DMA_TLB_PSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); | |
ea8ea460 | 1421 | /* IH bit is passed in as part of address */ |
ba395927 KA |
1422 | val_iva = size_order | addr; |
1423 | break; | |
1424 | default: | |
1425 | BUG(); | |
1426 | } | |
1427 | /* Note: set drain read/write */ | |
1428 | #if 0 | |
1429 | /* | |
1430 | * This is probably to be super secure.. Looks like we can | |
1431 | * ignore it without any impact. | |
1432 | */ | |
1433 | if (cap_read_drain(iommu->cap)) | |
1434 | val |= DMA_TLB_READ_DRAIN; | |
1435 | #endif | |
1436 | if (cap_write_drain(iommu->cap)) | |
1437 | val |= DMA_TLB_WRITE_DRAIN; | |
1438 | ||
1f5b3c3f | 1439 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
1440 | /* Note: Only uses first TLB reg currently */ |
1441 | if (val_iva) | |
1442 | dmar_writeq(iommu->reg + tlb_offset, val_iva); | |
1443 | dmar_writeq(iommu->reg + tlb_offset + 8, val); | |
1444 | ||
1445 | /* Make sure hardware complete it */ | |
1446 | IOMMU_WAIT_OP(iommu, tlb_offset + 8, | |
1447 | dmar_readq, (!(val & DMA_TLB_IVT)), val); | |
1448 | ||
1f5b3c3f | 1449 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1450 | |
1451 | /* check IOTLB invalidation granularity */ | |
1452 | if (DMA_TLB_IAIG(val) == 0) | |
9f10e5bf | 1453 | pr_err("Flush IOTLB failed\n"); |
ba395927 | 1454 | if (DMA_TLB_IAIG(val) != DMA_TLB_IIRG(type)) |
9f10e5bf | 1455 | pr_debug("TLB flush request %Lx, actual %Lx\n", |
5b6985ce FY |
1456 | (unsigned long long)DMA_TLB_IIRG(type), |
1457 | (unsigned long long)DMA_TLB_IAIG(val)); | |
ba395927 KA |
1458 | } |
1459 | ||
64ae892b DW |
1460 | static struct device_domain_info * |
1461 | iommu_support_dev_iotlb (struct dmar_domain *domain, struct intel_iommu *iommu, | |
1462 | u8 bus, u8 devfn) | |
93a23a72 | 1463 | { |
93a23a72 | 1464 | struct device_domain_info *info; |
93a23a72 | 1465 | |
55d94043 JR |
1466 | assert_spin_locked(&device_domain_lock); |
1467 | ||
93a23a72 YZ |
1468 | if (!iommu->qi) |
1469 | return NULL; | |
1470 | ||
93a23a72 | 1471 | list_for_each_entry(info, &domain->devices, link) |
c3b497c6 JL |
1472 | if (info->iommu == iommu && info->bus == bus && |
1473 | info->devfn == devfn) { | |
b16d0cb9 DW |
1474 | if (info->ats_supported && info->dev) |
1475 | return info; | |
93a23a72 YZ |
1476 | break; |
1477 | } | |
93a23a72 | 1478 | |
b16d0cb9 | 1479 | return NULL; |
93a23a72 YZ |
1480 | } |
1481 | ||
0824c592 OP |
1482 | static void domain_update_iotlb(struct dmar_domain *domain) |
1483 | { | |
1484 | struct device_domain_info *info; | |
1485 | bool has_iotlb_device = false; | |
1486 | ||
1487 | assert_spin_locked(&device_domain_lock); | |
1488 | ||
1489 | list_for_each_entry(info, &domain->devices, link) { | |
1490 | struct pci_dev *pdev; | |
1491 | ||
1492 | if (!info->dev || !dev_is_pci(info->dev)) | |
1493 | continue; | |
1494 | ||
1495 | pdev = to_pci_dev(info->dev); | |
1496 | if (pdev->ats_enabled) { | |
1497 | has_iotlb_device = true; | |
1498 | break; | |
1499 | } | |
1500 | } | |
1501 | ||
1502 | domain->has_iotlb_device = has_iotlb_device; | |
1503 | } | |
1504 | ||
93a23a72 | 1505 | static void iommu_enable_dev_iotlb(struct device_domain_info *info) |
ba395927 | 1506 | { |
fb0cc3aa BH |
1507 | struct pci_dev *pdev; |
1508 | ||
0824c592 OP |
1509 | assert_spin_locked(&device_domain_lock); |
1510 | ||
0bcb3e28 | 1511 | if (!info || !dev_is_pci(info->dev)) |
93a23a72 YZ |
1512 | return; |
1513 | ||
fb0cc3aa | 1514 | pdev = to_pci_dev(info->dev); |
b68377cb JP |
1515 | /* For IOMMU that supports device IOTLB throttling (DIT), we assign |
1516 | * PFSID to the invalidation desc of a VF such that IOMMU HW can gauge | |
1517 | * queue depth at PF level. If DIT is not set, PFSID will be treated as | |
1518 | * reserved, which should be set to 0. | |
1519 | */ | |
1520 | if (!ecap_dit(info->iommu->ecap)) | |
1521 | info->pfsid = 0; | |
1522 | else { | |
1523 | struct pci_dev *pf_pdev; | |
1524 | ||
1525 | /* pdev will be returned if device is not a vf */ | |
1526 | pf_pdev = pci_physfn(pdev); | |
1527 | info->pfsid = PCI_DEVID(pf_pdev->bus->number, pf_pdev->devfn); | |
1528 | } | |
fb0cc3aa | 1529 | |
b16d0cb9 DW |
1530 | #ifdef CONFIG_INTEL_IOMMU_SVM |
1531 | /* The PCIe spec, in its wisdom, declares that the behaviour of | |
1532 | the device if you enable PASID support after ATS support is | |
1533 | undefined. So always enable PASID support on devices which | |
1534 | have it, even if we can't yet know if we're ever going to | |
1535 | use it. */ | |
1536 | if (info->pasid_supported && !pci_enable_pasid(pdev, info->pasid_supported & ~1)) | |
1537 | info->pasid_enabled = 1; | |
1538 | ||
1539 | if (info->pri_supported && !pci_reset_pri(pdev) && !pci_enable_pri(pdev, 32)) | |
1540 | info->pri_enabled = 1; | |
1541 | #endif | |
1542 | if (info->ats_supported && !pci_enable_ats(pdev, VTD_PAGE_SHIFT)) { | |
1543 | info->ats_enabled = 1; | |
0824c592 | 1544 | domain_update_iotlb(info->domain); |
b16d0cb9 DW |
1545 | info->ats_qdep = pci_ats_queue_depth(pdev); |
1546 | } | |
93a23a72 YZ |
1547 | } |
1548 | ||
1549 | static void iommu_disable_dev_iotlb(struct device_domain_info *info) | |
1550 | { | |
b16d0cb9 DW |
1551 | struct pci_dev *pdev; |
1552 | ||
0824c592 OP |
1553 | assert_spin_locked(&device_domain_lock); |
1554 | ||
da972fb1 | 1555 | if (!dev_is_pci(info->dev)) |
93a23a72 YZ |
1556 | return; |
1557 | ||
b16d0cb9 DW |
1558 | pdev = to_pci_dev(info->dev); |
1559 | ||
1560 | if (info->ats_enabled) { | |
1561 | pci_disable_ats(pdev); | |
1562 | info->ats_enabled = 0; | |
0824c592 | 1563 | domain_update_iotlb(info->domain); |
b16d0cb9 DW |
1564 | } |
1565 | #ifdef CONFIG_INTEL_IOMMU_SVM | |
1566 | if (info->pri_enabled) { | |
1567 | pci_disable_pri(pdev); | |
1568 | info->pri_enabled = 0; | |
1569 | } | |
1570 | if (info->pasid_enabled) { | |
1571 | pci_disable_pasid(pdev); | |
1572 | info->pasid_enabled = 0; | |
1573 | } | |
1574 | #endif | |
93a23a72 YZ |
1575 | } |
1576 | ||
1577 | static void iommu_flush_dev_iotlb(struct dmar_domain *domain, | |
1578 | u64 addr, unsigned mask) | |
1579 | { | |
1580 | u16 sid, qdep; | |
1581 | unsigned long flags; | |
1582 | struct device_domain_info *info; | |
1583 | ||
0824c592 OP |
1584 | if (!domain->has_iotlb_device) |
1585 | return; | |
1586 | ||
93a23a72 YZ |
1587 | spin_lock_irqsave(&device_domain_lock, flags); |
1588 | list_for_each_entry(info, &domain->devices, link) { | |
b16d0cb9 | 1589 | if (!info->ats_enabled) |
93a23a72 YZ |
1590 | continue; |
1591 | ||
1592 | sid = info->bus << 8 | info->devfn; | |
b16d0cb9 | 1593 | qdep = info->ats_qdep; |
b68377cb JP |
1594 | qi_flush_dev_iotlb(info->iommu, sid, info->pfsid, |
1595 | qdep, addr, mask); | |
93a23a72 YZ |
1596 | } |
1597 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1598 | } | |
1599 | ||
a1ddcbe9 JR |
1600 | static void iommu_flush_iotlb_psi(struct intel_iommu *iommu, |
1601 | struct dmar_domain *domain, | |
1602 | unsigned long pfn, unsigned int pages, | |
1603 | int ih, int map) | |
ba395927 | 1604 | { |
9dd2fe89 | 1605 | unsigned int mask = ilog2(__roundup_pow_of_two(pages)); |
03d6a246 | 1606 | uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT; |
a1ddcbe9 | 1607 | u16 did = domain->iommu_did[iommu->seq_id]; |
ba395927 | 1608 | |
ba395927 KA |
1609 | BUG_ON(pages == 0); |
1610 | ||
ea8ea460 DW |
1611 | if (ih) |
1612 | ih = 1 << 6; | |
ba395927 | 1613 | /* |
9dd2fe89 YZ |
1614 | * Fallback to domain selective flush if no PSI support or the size is |
1615 | * too big. | |
ba395927 KA |
1616 | * PSI requires page size to be 2 ^ x, and the base address is naturally |
1617 | * aligned to the size | |
1618 | */ | |
9dd2fe89 YZ |
1619 | if (!cap_pgsel_inv(iommu->cap) || mask > cap_max_amask_val(iommu->cap)) |
1620 | iommu->flush.flush_iotlb(iommu, did, 0, 0, | |
1f0ef2aa | 1621 | DMA_TLB_DSI_FLUSH); |
9dd2fe89 | 1622 | else |
ea8ea460 | 1623 | iommu->flush.flush_iotlb(iommu, did, addr | ih, mask, |
9dd2fe89 | 1624 | DMA_TLB_PSI_FLUSH); |
bf92df30 YZ |
1625 | |
1626 | /* | |
82653633 NA |
1627 | * In caching mode, changes of pages from non-present to present require |
1628 | * flush. However, device IOTLB doesn't need to be flushed in this case. | |
bf92df30 | 1629 | */ |
82653633 | 1630 | if (!cap_caching_mode(iommu->cap) || !map) |
b5c2e607 | 1631 | iommu_flush_dev_iotlb(domain, addr, mask); |
ba395927 KA |
1632 | } |
1633 | ||
f8bab735 | 1634 | static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu) |
1635 | { | |
1636 | u32 pmen; | |
1637 | unsigned long flags; | |
1638 | ||
41f08cc5 LB |
1639 | if (!cap_plmr(iommu->cap) && !cap_phmr(iommu->cap)) |
1640 | return; | |
1641 | ||
1f5b3c3f | 1642 | raw_spin_lock_irqsave(&iommu->register_lock, flags); |
f8bab735 | 1643 | pmen = readl(iommu->reg + DMAR_PMEN_REG); |
1644 | pmen &= ~DMA_PMEN_EPM; | |
1645 | writel(pmen, iommu->reg + DMAR_PMEN_REG); | |
1646 | ||
1647 | /* wait for the protected region status bit to clear */ | |
1648 | IOMMU_WAIT_OP(iommu, DMAR_PMEN_REG, | |
1649 | readl, !(pmen & DMA_PMEN_PRS), pmen); | |
1650 | ||
1f5b3c3f | 1651 | raw_spin_unlock_irqrestore(&iommu->register_lock, flags); |
f8bab735 | 1652 | } |
1653 | ||
2a41ccee | 1654 | static void iommu_enable_translation(struct intel_iommu *iommu) |
ba395927 KA |
1655 | { |
1656 | u32 sts; | |
1657 | unsigned long flags; | |
1658 | ||
1f5b3c3f | 1659 | raw_spin_lock_irqsave(&iommu->register_lock, flags); |
c416daa9 DW |
1660 | iommu->gcmd |= DMA_GCMD_TE; |
1661 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); | |
ba395927 KA |
1662 | |
1663 | /* Make sure hardware complete it */ | |
1664 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1665 | readl, (sts & DMA_GSTS_TES), sts); |
ba395927 | 1666 | |
1f5b3c3f | 1667 | raw_spin_unlock_irqrestore(&iommu->register_lock, flags); |
ba395927 KA |
1668 | } |
1669 | ||
2a41ccee | 1670 | static void iommu_disable_translation(struct intel_iommu *iommu) |
ba395927 KA |
1671 | { |
1672 | u32 sts; | |
1673 | unsigned long flag; | |
1674 | ||
1f5b3c3f | 1675 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
1676 | iommu->gcmd &= ~DMA_GCMD_TE; |
1677 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); | |
1678 | ||
1679 | /* Make sure hardware complete it */ | |
1680 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1681 | readl, (!(sts & DMA_GSTS_TES)), sts); |
ba395927 | 1682 | |
1f5b3c3f | 1683 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1684 | } |
1685 | ||
3460a6d9 | 1686 | |
ba395927 KA |
1687 | static int iommu_init_domains(struct intel_iommu *iommu) |
1688 | { | |
8bf47816 JR |
1689 | u32 ndomains, nlongs; |
1690 | size_t size; | |
ba395927 KA |
1691 | |
1692 | ndomains = cap_ndoms(iommu->cap); | |
8bf47816 | 1693 | pr_debug("%s: Number of Domains supported <%d>\n", |
9f10e5bf | 1694 | iommu->name, ndomains); |
ba395927 KA |
1695 | nlongs = BITS_TO_LONGS(ndomains); |
1696 | ||
94a91b50 DD |
1697 | spin_lock_init(&iommu->lock); |
1698 | ||
ba395927 KA |
1699 | iommu->domain_ids = kcalloc(nlongs, sizeof(unsigned long), GFP_KERNEL); |
1700 | if (!iommu->domain_ids) { | |
9f10e5bf JR |
1701 | pr_err("%s: Allocating domain id array failed\n", |
1702 | iommu->name); | |
ba395927 KA |
1703 | return -ENOMEM; |
1704 | } | |
8bf47816 | 1705 | |
86f004c7 | 1706 | size = (ALIGN(ndomains, 256) >> 8) * sizeof(struct dmar_domain **); |
8bf47816 JR |
1707 | iommu->domains = kzalloc(size, GFP_KERNEL); |
1708 | ||
1709 | if (iommu->domains) { | |
1710 | size = 256 * sizeof(struct dmar_domain *); | |
1711 | iommu->domains[0] = kzalloc(size, GFP_KERNEL); | |
1712 | } | |
1713 | ||
1714 | if (!iommu->domains || !iommu->domains[0]) { | |
9f10e5bf JR |
1715 | pr_err("%s: Allocating domain array failed\n", |
1716 | iommu->name); | |
852bdb04 | 1717 | kfree(iommu->domain_ids); |
8bf47816 | 1718 | kfree(iommu->domains); |
852bdb04 | 1719 | iommu->domain_ids = NULL; |
8bf47816 | 1720 | iommu->domains = NULL; |
ba395927 KA |
1721 | return -ENOMEM; |
1722 | } | |
1723 | ||
8bf47816 JR |
1724 | |
1725 | ||
ba395927 | 1726 | /* |
c0e8a6c8 JR |
1727 | * If Caching mode is set, then invalid translations are tagged |
1728 | * with domain-id 0, hence we need to pre-allocate it. We also | |
1729 | * use domain-id 0 as a marker for non-allocated domain-id, so | |
1730 | * make sure it is not used for a real domain. | |
ba395927 | 1731 | */ |
c0e8a6c8 JR |
1732 | set_bit(0, iommu->domain_ids); |
1733 | ||
ba395927 KA |
1734 | return 0; |
1735 | } | |
ba395927 | 1736 | |
ffebeb46 | 1737 | static void disable_dmar_iommu(struct intel_iommu *iommu) |
ba395927 | 1738 | { |
29a27719 | 1739 | struct device_domain_info *info, *tmp; |
55d94043 | 1740 | unsigned long flags; |
ba395927 | 1741 | |
29a27719 JR |
1742 | if (!iommu->domains || !iommu->domain_ids) |
1743 | return; | |
a4eaa86c | 1744 | |
bea64033 | 1745 | again: |
55d94043 | 1746 | spin_lock_irqsave(&device_domain_lock, flags); |
29a27719 JR |
1747 | list_for_each_entry_safe(info, tmp, &device_domain_list, global) { |
1748 | struct dmar_domain *domain; | |
1749 | ||
1750 | if (info->iommu != iommu) | |
1751 | continue; | |
1752 | ||
1753 | if (!info->dev || !info->domain) | |
1754 | continue; | |
1755 | ||
1756 | domain = info->domain; | |
1757 | ||
bea64033 | 1758 | __dmar_remove_one_dev_info(info); |
29a27719 | 1759 | |
bea64033 JR |
1760 | if (!domain_type_is_vm_or_si(domain)) { |
1761 | /* | |
1762 | * The domain_exit() function can't be called under | |
1763 | * device_domain_lock, as it takes this lock itself. | |
1764 | * So release the lock here and re-run the loop | |
1765 | * afterwards. | |
1766 | */ | |
1767 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
29a27719 | 1768 | domain_exit(domain); |
bea64033 JR |
1769 | goto again; |
1770 | } | |
ba395927 | 1771 | } |
55d94043 | 1772 | spin_unlock_irqrestore(&device_domain_lock, flags); |
ba395927 KA |
1773 | |
1774 | if (iommu->gcmd & DMA_GCMD_TE) | |
1775 | iommu_disable_translation(iommu); | |
ffebeb46 | 1776 | } |
ba395927 | 1777 | |
ffebeb46 JL |
1778 | static void free_dmar_iommu(struct intel_iommu *iommu) |
1779 | { | |
1780 | if ((iommu->domains) && (iommu->domain_ids)) { | |
86f004c7 | 1781 | int elems = ALIGN(cap_ndoms(iommu->cap), 256) >> 8; |
8bf47816 JR |
1782 | int i; |
1783 | ||
1784 | for (i = 0; i < elems; i++) | |
1785 | kfree(iommu->domains[i]); | |
ffebeb46 JL |
1786 | kfree(iommu->domains); |
1787 | kfree(iommu->domain_ids); | |
1788 | iommu->domains = NULL; | |
1789 | iommu->domain_ids = NULL; | |
1790 | } | |
ba395927 | 1791 | |
d9630fe9 WH |
1792 | g_iommus[iommu->seq_id] = NULL; |
1793 | ||
ba395927 KA |
1794 | /* free context mapping */ |
1795 | free_context_table(iommu); | |
8a94ade4 DW |
1796 | |
1797 | #ifdef CONFIG_INTEL_IOMMU_SVM | |
a222a7f0 DW |
1798 | if (pasid_enabled(iommu)) { |
1799 | if (ecap_prs(iommu->ecap)) | |
1800 | intel_svm_finish_prq(iommu); | |
8a94ade4 | 1801 | intel_svm_free_pasid_tables(iommu); |
a222a7f0 | 1802 | } |
8a94ade4 | 1803 | #endif |
ba395927 KA |
1804 | } |
1805 | ||
ab8dfe25 | 1806 | static struct dmar_domain *alloc_domain(int flags) |
ba395927 | 1807 | { |
ba395927 | 1808 | struct dmar_domain *domain; |
ba395927 KA |
1809 | |
1810 | domain = alloc_domain_mem(); | |
1811 | if (!domain) | |
1812 | return NULL; | |
1813 | ||
ab8dfe25 | 1814 | memset(domain, 0, sizeof(*domain)); |
4c923d47 | 1815 | domain->nid = -1; |
ab8dfe25 | 1816 | domain->flags = flags; |
0824c592 | 1817 | domain->has_iotlb_device = false; |
92d03cc8 | 1818 | INIT_LIST_HEAD(&domain->devices); |
2c2e2c38 FY |
1819 | |
1820 | return domain; | |
1821 | } | |
1822 | ||
d160aca5 JR |
1823 | /* Must be called with iommu->lock */ |
1824 | static int domain_attach_iommu(struct dmar_domain *domain, | |
fb170fb4 JL |
1825 | struct intel_iommu *iommu) |
1826 | { | |
44bde614 | 1827 | unsigned long ndomains; |
55d94043 | 1828 | int num; |
44bde614 | 1829 | |
55d94043 | 1830 | assert_spin_locked(&device_domain_lock); |
d160aca5 | 1831 | assert_spin_locked(&iommu->lock); |
ba395927 | 1832 | |
29a27719 JR |
1833 | domain->iommu_refcnt[iommu->seq_id] += 1; |
1834 | domain->iommu_count += 1; | |
1835 | if (domain->iommu_refcnt[iommu->seq_id] == 1) { | |
fb170fb4 | 1836 | ndomains = cap_ndoms(iommu->cap); |
d160aca5 JR |
1837 | num = find_first_zero_bit(iommu->domain_ids, ndomains); |
1838 | ||
1839 | if (num >= ndomains) { | |
1840 | pr_err("%s: No free domain ids\n", iommu->name); | |
1841 | domain->iommu_refcnt[iommu->seq_id] -= 1; | |
1842 | domain->iommu_count -= 1; | |
55d94043 | 1843 | return -ENOSPC; |
2c2e2c38 | 1844 | } |
ba395927 | 1845 | |
d160aca5 JR |
1846 | set_bit(num, iommu->domain_ids); |
1847 | set_iommu_domain(iommu, num, domain); | |
1848 | ||
1849 | domain->iommu_did[iommu->seq_id] = num; | |
1850 | domain->nid = iommu->node; | |
fb170fb4 | 1851 | |
fb170fb4 JL |
1852 | domain_update_iommu_cap(domain); |
1853 | } | |
d160aca5 | 1854 | |
55d94043 | 1855 | return 0; |
fb170fb4 JL |
1856 | } |
1857 | ||
1858 | static int domain_detach_iommu(struct dmar_domain *domain, | |
1859 | struct intel_iommu *iommu) | |
1860 | { | |
d160aca5 | 1861 | int num, count = INT_MAX; |
d160aca5 | 1862 | |
55d94043 | 1863 | assert_spin_locked(&device_domain_lock); |
d160aca5 | 1864 | assert_spin_locked(&iommu->lock); |
fb170fb4 | 1865 | |
29a27719 JR |
1866 | domain->iommu_refcnt[iommu->seq_id] -= 1; |
1867 | count = --domain->iommu_count; | |
1868 | if (domain->iommu_refcnt[iommu->seq_id] == 0) { | |
d160aca5 JR |
1869 | num = domain->iommu_did[iommu->seq_id]; |
1870 | clear_bit(num, iommu->domain_ids); | |
1871 | set_iommu_domain(iommu, num, NULL); | |
fb170fb4 | 1872 | |
fb170fb4 | 1873 | domain_update_iommu_cap(domain); |
c0e8a6c8 | 1874 | domain->iommu_did[iommu->seq_id] = 0; |
fb170fb4 | 1875 | } |
fb170fb4 JL |
1876 | |
1877 | return count; | |
1878 | } | |
1879 | ||
ba395927 | 1880 | static struct iova_domain reserved_iova_list; |
8a443df4 | 1881 | static struct lock_class_key reserved_rbtree_key; |
ba395927 | 1882 | |
51a63e67 | 1883 | static int dmar_init_reserved_ranges(void) |
ba395927 KA |
1884 | { |
1885 | struct pci_dev *pdev = NULL; | |
1886 | struct iova *iova; | |
1887 | int i; | |
ba395927 | 1888 | |
0fb5fe87 RM |
1889 | init_iova_domain(&reserved_iova_list, VTD_PAGE_SIZE, IOVA_START_PFN, |
1890 | DMA_32BIT_PFN); | |
ba395927 | 1891 | |
8a443df4 MG |
1892 | lockdep_set_class(&reserved_iova_list.iova_rbtree_lock, |
1893 | &reserved_rbtree_key); | |
1894 | ||
ba395927 KA |
1895 | /* IOAPIC ranges shouldn't be accessed by DMA */ |
1896 | iova = reserve_iova(&reserved_iova_list, IOVA_PFN(IOAPIC_RANGE_START), | |
1897 | IOVA_PFN(IOAPIC_RANGE_END)); | |
51a63e67 | 1898 | if (!iova) { |
9f10e5bf | 1899 | pr_err("Reserve IOAPIC range failed\n"); |
51a63e67 JC |
1900 | return -ENODEV; |
1901 | } | |
ba395927 KA |
1902 | |
1903 | /* Reserve all PCI MMIO to avoid peer-to-peer access */ | |
1904 | for_each_pci_dev(pdev) { | |
1905 | struct resource *r; | |
1906 | ||
1907 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
1908 | r = &pdev->resource[i]; | |
1909 | if (!r->flags || !(r->flags & IORESOURCE_MEM)) | |
1910 | continue; | |
1a4a4551 DW |
1911 | iova = reserve_iova(&reserved_iova_list, |
1912 | IOVA_PFN(r->start), | |
1913 | IOVA_PFN(r->end)); | |
51a63e67 | 1914 | if (!iova) { |
9f10e5bf | 1915 | pr_err("Reserve iova failed\n"); |
51a63e67 JC |
1916 | return -ENODEV; |
1917 | } | |
ba395927 KA |
1918 | } |
1919 | } | |
51a63e67 | 1920 | return 0; |
ba395927 KA |
1921 | } |
1922 | ||
1923 | static void domain_reserve_special_ranges(struct dmar_domain *domain) | |
1924 | { | |
1925 | copy_reserved_iova(&reserved_iova_list, &domain->iovad); | |
1926 | } | |
1927 | ||
1928 | static inline int guestwidth_to_adjustwidth(int gaw) | |
1929 | { | |
1930 | int agaw; | |
1931 | int r = (gaw - 12) % 9; | |
1932 | ||
1933 | if (r == 0) | |
1934 | agaw = gaw; | |
1935 | else | |
1936 | agaw = gaw + 9 - r; | |
1937 | if (agaw > 64) | |
1938 | agaw = 64; | |
1939 | return agaw; | |
1940 | } | |
1941 | ||
dc534b25 JR |
1942 | static int domain_init(struct dmar_domain *domain, struct intel_iommu *iommu, |
1943 | int guest_width) | |
ba395927 | 1944 | { |
ba395927 KA |
1945 | int adjust_width, agaw; |
1946 | unsigned long sagaw; | |
1947 | ||
0fb5fe87 RM |
1948 | init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN, |
1949 | DMA_32BIT_PFN); | |
ba395927 KA |
1950 | domain_reserve_special_ranges(domain); |
1951 | ||
1952 | /* calculate AGAW */ | |
ba395927 KA |
1953 | if (guest_width > cap_mgaw(iommu->cap)) |
1954 | guest_width = cap_mgaw(iommu->cap); | |
1955 | domain->gaw = guest_width; | |
1956 | adjust_width = guestwidth_to_adjustwidth(guest_width); | |
1957 | agaw = width_to_agaw(adjust_width); | |
1958 | sagaw = cap_sagaw(iommu->cap); | |
1959 | if (!test_bit(agaw, &sagaw)) { | |
1960 | /* hardware doesn't support it, choose a bigger one */ | |
9f10e5bf | 1961 | pr_debug("Hardware doesn't support agaw %d\n", agaw); |
ba395927 KA |
1962 | agaw = find_next_bit(&sagaw, 5, agaw); |
1963 | if (agaw >= 5) | |
1964 | return -ENODEV; | |
1965 | } | |
1966 | domain->agaw = agaw; | |
ba395927 | 1967 | |
8e604097 WH |
1968 | if (ecap_coherent(iommu->ecap)) |
1969 | domain->iommu_coherency = 1; | |
1970 | else | |
1971 | domain->iommu_coherency = 0; | |
1972 | ||
58c610bd SY |
1973 | if (ecap_sc_support(iommu->ecap)) |
1974 | domain->iommu_snooping = 1; | |
1975 | else | |
1976 | domain->iommu_snooping = 0; | |
1977 | ||
214e39aa DW |
1978 | if (intel_iommu_superpage) |
1979 | domain->iommu_superpage = fls(cap_super_page_val(iommu->cap)); | |
1980 | else | |
1981 | domain->iommu_superpage = 0; | |
1982 | ||
4c923d47 | 1983 | domain->nid = iommu->node; |
c7151a8d | 1984 | |
ba395927 | 1985 | /* always allocate the top pgd */ |
4c923d47 | 1986 | domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid); |
ba395927 KA |
1987 | if (!domain->pgd) |
1988 | return -ENOMEM; | |
5b6985ce | 1989 | __iommu_flush_cache(iommu, domain->pgd, PAGE_SIZE); |
ba395927 KA |
1990 | return 0; |
1991 | } | |
1992 | ||
1993 | static void domain_exit(struct dmar_domain *domain) | |
1994 | { | |
ea8ea460 | 1995 | struct page *freelist = NULL; |
ba395927 KA |
1996 | |
1997 | /* Domain 0 is reserved, so dont process it */ | |
1998 | if (!domain) | |
1999 | return; | |
2000 | ||
7b668357 | 2001 | /* Flush any lazy unmaps that may reference this domain */ |
aa473240 OP |
2002 | if (!intel_iommu_strict) { |
2003 | int cpu; | |
2004 | ||
2005 | for_each_possible_cpu(cpu) | |
2006 | flush_unmaps_timeout(cpu); | |
2007 | } | |
7b668357 | 2008 | |
d160aca5 JR |
2009 | /* Remove associated devices and clear attached or cached domains */ |
2010 | rcu_read_lock(); | |
ba395927 | 2011 | domain_remove_dev_info(domain); |
d160aca5 | 2012 | rcu_read_unlock(); |
92d03cc8 | 2013 | |
ba395927 KA |
2014 | /* destroy iovas */ |
2015 | put_iova_domain(&domain->iovad); | |
ba395927 | 2016 | |
ea8ea460 | 2017 | freelist = domain_unmap(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
ba395927 | 2018 | |
ea8ea460 DW |
2019 | dma_free_pagelist(freelist); |
2020 | ||
ba395927 KA |
2021 | free_domain_mem(domain); |
2022 | } | |
2023 | ||
64ae892b DW |
2024 | static int domain_context_mapping_one(struct dmar_domain *domain, |
2025 | struct intel_iommu *iommu, | |
28ccce0d | 2026 | u8 bus, u8 devfn) |
ba395927 | 2027 | { |
c6c2cebd | 2028 | u16 did = domain->iommu_did[iommu->seq_id]; |
28ccce0d JR |
2029 | int translation = CONTEXT_TT_MULTI_LEVEL; |
2030 | struct device_domain_info *info = NULL; | |
ba395927 | 2031 | struct context_entry *context; |
ba395927 | 2032 | unsigned long flags; |
ea6606b0 | 2033 | struct dma_pte *pgd; |
55d94043 | 2034 | int ret, agaw; |
28ccce0d | 2035 | |
c6c2cebd JR |
2036 | WARN_ON(did == 0); |
2037 | ||
28ccce0d JR |
2038 | if (hw_pass_through && domain_type_is_si(domain)) |
2039 | translation = CONTEXT_TT_PASS_THROUGH; | |
ba395927 KA |
2040 | |
2041 | pr_debug("Set context mapping for %02x:%02x.%d\n", | |
2042 | bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); | |
4ed0d3e6 | 2043 | |
ba395927 | 2044 | BUG_ON(!domain->pgd); |
5331fe6f | 2045 | |
55d94043 JR |
2046 | spin_lock_irqsave(&device_domain_lock, flags); |
2047 | spin_lock(&iommu->lock); | |
2048 | ||
2049 | ret = -ENOMEM; | |
03ecc32c | 2050 | context = iommu_context_addr(iommu, bus, devfn, 1); |
ba395927 | 2051 | if (!context) |
55d94043 | 2052 | goto out_unlock; |
ba395927 | 2053 | |
55d94043 JR |
2054 | ret = 0; |
2055 | if (context_present(context)) | |
2056 | goto out_unlock; | |
cf484d0e | 2057 | |
afd7e2b4 XP |
2058 | /* |
2059 | * For kdump cases, old valid entries may be cached due to the | |
2060 | * in-flight DMA and copied pgtable, but there is no unmapping | |
2061 | * behaviour for them, thus we need an explicit cache flush for | |
2062 | * the newly-mapped device. For kdump, at this point, the device | |
2063 | * is supposed to finish reset at its driver probe stage, so no | |
2064 | * in-flight DMA will exist, and we don't need to worry anymore | |
2065 | * hereafter. | |
2066 | */ | |
2067 | if (context_copied(context)) { | |
2068 | u16 did_old = context_domain_id(context); | |
2069 | ||
21f2950f | 2070 | if (did_old >= 0 && did_old < cap_ndoms(iommu->cap)) { |
afd7e2b4 XP |
2071 | iommu->flush.flush_context(iommu, did_old, |
2072 | (((u16)bus) << 8) | devfn, | |
2073 | DMA_CCMD_MASK_NOBIT, | |
2074 | DMA_CCMD_DEVICE_INVL); | |
21f2950f KA |
2075 | iommu->flush.flush_iotlb(iommu, did_old, 0, 0, |
2076 | DMA_TLB_DSI_FLUSH); | |
2077 | } | |
afd7e2b4 XP |
2078 | } |
2079 | ||
ea6606b0 WH |
2080 | pgd = domain->pgd; |
2081 | ||
de24e553 | 2082 | context_clear_entry(context); |
c6c2cebd | 2083 | context_set_domain_id(context, did); |
ea6606b0 | 2084 | |
de24e553 JR |
2085 | /* |
2086 | * Skip top levels of page tables for iommu which has less agaw | |
2087 | * than default. Unnecessary for PT mode. | |
2088 | */ | |
93a23a72 | 2089 | if (translation != CONTEXT_TT_PASS_THROUGH) { |
da4b7ae4 | 2090 | for (agaw = domain->agaw; agaw > iommu->agaw; agaw--) { |
55d94043 | 2091 | ret = -ENOMEM; |
de24e553 | 2092 | pgd = phys_to_virt(dma_pte_addr(pgd)); |
55d94043 JR |
2093 | if (!dma_pte_present(pgd)) |
2094 | goto out_unlock; | |
ea6606b0 | 2095 | } |
4ed0d3e6 | 2096 | |
64ae892b | 2097 | info = iommu_support_dev_iotlb(domain, iommu, bus, devfn); |
b16d0cb9 DW |
2098 | if (info && info->ats_supported) |
2099 | translation = CONTEXT_TT_DEV_IOTLB; | |
2100 | else | |
2101 | translation = CONTEXT_TT_MULTI_LEVEL; | |
de24e553 | 2102 | |
93a23a72 | 2103 | context_set_address_root(context, virt_to_phys(pgd)); |
da4b7ae4 | 2104 | context_set_address_width(context, agaw); |
de24e553 JR |
2105 | } else { |
2106 | /* | |
2107 | * In pass through mode, AW must be programmed to | |
2108 | * indicate the largest AGAW value supported by | |
2109 | * hardware. And ASR is ignored by hardware. | |
2110 | */ | |
2111 | context_set_address_width(context, iommu->msagaw); | |
93a23a72 | 2112 | } |
4ed0d3e6 FY |
2113 | |
2114 | context_set_translation_type(context, translation); | |
c07e7d21 MM |
2115 | context_set_fault_enable(context); |
2116 | context_set_present(context); | |
5331fe6f | 2117 | domain_flush_cache(domain, context, sizeof(*context)); |
ba395927 | 2118 | |
4c25a2c1 DW |
2119 | /* |
2120 | * It's a non-present to present mapping. If hardware doesn't cache | |
2121 | * non-present entry we only need to flush the write-buffer. If the | |
2122 | * _does_ cache non-present entries, then it does so in the special | |
2123 | * domain #0, which we have to flush: | |
2124 | */ | |
2125 | if (cap_caching_mode(iommu->cap)) { | |
2126 | iommu->flush.flush_context(iommu, 0, | |
2127 | (((u16)bus) << 8) | devfn, | |
2128 | DMA_CCMD_MASK_NOBIT, | |
2129 | DMA_CCMD_DEVICE_INVL); | |
c6c2cebd | 2130 | iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH); |
4c25a2c1 | 2131 | } else { |
ba395927 | 2132 | iommu_flush_write_buffer(iommu); |
4c25a2c1 | 2133 | } |
93a23a72 | 2134 | iommu_enable_dev_iotlb(info); |
c7151a8d | 2135 | |
55d94043 JR |
2136 | ret = 0; |
2137 | ||
2138 | out_unlock: | |
2139 | spin_unlock(&iommu->lock); | |
2140 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
fb170fb4 | 2141 | |
5c365d18 | 2142 | return ret; |
ba395927 KA |
2143 | } |
2144 | ||
579305f7 AW |
2145 | struct domain_context_mapping_data { |
2146 | struct dmar_domain *domain; | |
2147 | struct intel_iommu *iommu; | |
579305f7 AW |
2148 | }; |
2149 | ||
2150 | static int domain_context_mapping_cb(struct pci_dev *pdev, | |
2151 | u16 alias, void *opaque) | |
2152 | { | |
2153 | struct domain_context_mapping_data *data = opaque; | |
2154 | ||
2155 | return domain_context_mapping_one(data->domain, data->iommu, | |
28ccce0d | 2156 | PCI_BUS_NUM(alias), alias & 0xff); |
579305f7 AW |
2157 | } |
2158 | ||
ba395927 | 2159 | static int |
28ccce0d | 2160 | domain_context_mapping(struct dmar_domain *domain, struct device *dev) |
ba395927 | 2161 | { |
64ae892b | 2162 | struct intel_iommu *iommu; |
156baca8 | 2163 | u8 bus, devfn; |
579305f7 | 2164 | struct domain_context_mapping_data data; |
64ae892b | 2165 | |
e1f167f3 | 2166 | iommu = device_to_iommu(dev, &bus, &devfn); |
64ae892b DW |
2167 | if (!iommu) |
2168 | return -ENODEV; | |
ba395927 | 2169 | |
579305f7 | 2170 | if (!dev_is_pci(dev)) |
28ccce0d | 2171 | return domain_context_mapping_one(domain, iommu, bus, devfn); |
579305f7 AW |
2172 | |
2173 | data.domain = domain; | |
2174 | data.iommu = iommu; | |
579305f7 AW |
2175 | |
2176 | return pci_for_each_dma_alias(to_pci_dev(dev), | |
2177 | &domain_context_mapping_cb, &data); | |
2178 | } | |
2179 | ||
2180 | static int domain_context_mapped_cb(struct pci_dev *pdev, | |
2181 | u16 alias, void *opaque) | |
2182 | { | |
2183 | struct intel_iommu *iommu = opaque; | |
2184 | ||
2185 | return !device_context_mapped(iommu, PCI_BUS_NUM(alias), alias & 0xff); | |
ba395927 KA |
2186 | } |
2187 | ||
e1f167f3 | 2188 | static int domain_context_mapped(struct device *dev) |
ba395927 | 2189 | { |
5331fe6f | 2190 | struct intel_iommu *iommu; |
156baca8 | 2191 | u8 bus, devfn; |
5331fe6f | 2192 | |
e1f167f3 | 2193 | iommu = device_to_iommu(dev, &bus, &devfn); |
5331fe6f WH |
2194 | if (!iommu) |
2195 | return -ENODEV; | |
ba395927 | 2196 | |
579305f7 AW |
2197 | if (!dev_is_pci(dev)) |
2198 | return device_context_mapped(iommu, bus, devfn); | |
e1f167f3 | 2199 | |
579305f7 AW |
2200 | return !pci_for_each_dma_alias(to_pci_dev(dev), |
2201 | domain_context_mapped_cb, iommu); | |
ba395927 KA |
2202 | } |
2203 | ||
f532959b FY |
2204 | /* Returns a number of VTD pages, but aligned to MM page size */ |
2205 | static inline unsigned long aligned_nrpages(unsigned long host_addr, | |
2206 | size_t size) | |
2207 | { | |
2208 | host_addr &= ~PAGE_MASK; | |
2209 | return PAGE_ALIGN(host_addr + size) >> VTD_PAGE_SHIFT; | |
2210 | } | |
2211 | ||
6dd9a7c7 YS |
2212 | /* Return largest possible superpage level for a given mapping */ |
2213 | static inline int hardware_largepage_caps(struct dmar_domain *domain, | |
2214 | unsigned long iov_pfn, | |
2215 | unsigned long phy_pfn, | |
2216 | unsigned long pages) | |
2217 | { | |
2218 | int support, level = 1; | |
2219 | unsigned long pfnmerge; | |
2220 | ||
2221 | support = domain->iommu_superpage; | |
2222 | ||
2223 | /* To use a large page, the virtual *and* physical addresses | |
2224 | must be aligned to 2MiB/1GiB/etc. Lower bits set in either | |
2225 | of them will mean we have to use smaller pages. So just | |
2226 | merge them and check both at once. */ | |
2227 | pfnmerge = iov_pfn | phy_pfn; | |
2228 | ||
2229 | while (support && !(pfnmerge & ~VTD_STRIDE_MASK)) { | |
2230 | pages >>= VTD_STRIDE_SHIFT; | |
2231 | if (!pages) | |
2232 | break; | |
2233 | pfnmerge >>= VTD_STRIDE_SHIFT; | |
2234 | level++; | |
2235 | support--; | |
2236 | } | |
2237 | return level; | |
2238 | } | |
2239 | ||
9051aa02 DW |
2240 | static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
2241 | struct scatterlist *sg, unsigned long phys_pfn, | |
2242 | unsigned long nr_pages, int prot) | |
e1605495 DW |
2243 | { |
2244 | struct dma_pte *first_pte = NULL, *pte = NULL; | |
9051aa02 | 2245 | phys_addr_t uninitialized_var(pteval); |
cc4f14aa | 2246 | unsigned long sg_res = 0; |
6dd9a7c7 YS |
2247 | unsigned int largepage_lvl = 0; |
2248 | unsigned long lvl_pages = 0; | |
e1605495 | 2249 | |
162d1b10 | 2250 | BUG_ON(!domain_pfn_supported(domain, iov_pfn + nr_pages - 1)); |
e1605495 DW |
2251 | |
2252 | if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0) | |
2253 | return -EINVAL; | |
2254 | ||
2255 | prot &= DMA_PTE_READ | DMA_PTE_WRITE | DMA_PTE_SNP; | |
2256 | ||
cc4f14aa JL |
2257 | if (!sg) { |
2258 | sg_res = nr_pages; | |
9051aa02 DW |
2259 | pteval = ((phys_addr_t)phys_pfn << VTD_PAGE_SHIFT) | prot; |
2260 | } | |
2261 | ||
6dd9a7c7 | 2262 | while (nr_pages > 0) { |
c85994e4 DW |
2263 | uint64_t tmp; |
2264 | ||
e1605495 | 2265 | if (!sg_res) { |
e17f2b51 RM |
2266 | unsigned int pgoff = sg->offset & ~PAGE_MASK; |
2267 | ||
f532959b | 2268 | sg_res = aligned_nrpages(sg->offset, sg->length); |
e17f2b51 | 2269 | sg->dma_address = ((dma_addr_t)iov_pfn << VTD_PAGE_SHIFT) + pgoff; |
e1605495 | 2270 | sg->dma_length = sg->length; |
e17f2b51 | 2271 | pteval = (sg_phys(sg) - pgoff) | prot; |
6dd9a7c7 | 2272 | phys_pfn = pteval >> VTD_PAGE_SHIFT; |
e1605495 | 2273 | } |
6dd9a7c7 | 2274 | |
e1605495 | 2275 | if (!pte) { |
6dd9a7c7 YS |
2276 | largepage_lvl = hardware_largepage_caps(domain, iov_pfn, phys_pfn, sg_res); |
2277 | ||
5cf0a76f | 2278 | first_pte = pte = pfn_to_dma_pte(domain, iov_pfn, &largepage_lvl); |
e1605495 DW |
2279 | if (!pte) |
2280 | return -ENOMEM; | |
6dd9a7c7 | 2281 | /* It is large page*/ |
6491d4d0 | 2282 | if (largepage_lvl > 1) { |
ba2374fd CZ |
2283 | unsigned long nr_superpages, end_pfn; |
2284 | ||
6dd9a7c7 | 2285 | pteval |= DMA_PTE_LARGE_PAGE; |
d41a4adb | 2286 | lvl_pages = lvl_to_nr_pages(largepage_lvl); |
ba2374fd CZ |
2287 | |
2288 | nr_superpages = sg_res / lvl_pages; | |
2289 | end_pfn = iov_pfn + nr_superpages * lvl_pages - 1; | |
2290 | ||
d41a4adb JL |
2291 | /* |
2292 | * Ensure that old small page tables are | |
ba2374fd | 2293 | * removed to make room for superpage(s). |
d41a4adb | 2294 | */ |
ba2374fd | 2295 | dma_pte_free_pagetable(domain, iov_pfn, end_pfn); |
6491d4d0 | 2296 | } else { |
6dd9a7c7 | 2297 | pteval &= ~(uint64_t)DMA_PTE_LARGE_PAGE; |
6491d4d0 | 2298 | } |
6dd9a7c7 | 2299 | |
e1605495 DW |
2300 | } |
2301 | /* We don't need lock here, nobody else | |
2302 | * touches the iova range | |
2303 | */ | |
7766a3fb | 2304 | tmp = cmpxchg64_local(&pte->val, 0ULL, pteval); |
c85994e4 | 2305 | if (tmp) { |
1bf20f0d | 2306 | static int dumps = 5; |
9f10e5bf JR |
2307 | pr_crit("ERROR: DMA PTE for vPFN 0x%lx already set (to %llx not %llx)\n", |
2308 | iov_pfn, tmp, (unsigned long long)pteval); | |
1bf20f0d DW |
2309 | if (dumps) { |
2310 | dumps--; | |
2311 | debug_dma_dump_mappings(NULL); | |
2312 | } | |
2313 | WARN_ON(1); | |
2314 | } | |
6dd9a7c7 YS |
2315 | |
2316 | lvl_pages = lvl_to_nr_pages(largepage_lvl); | |
2317 | ||
2318 | BUG_ON(nr_pages < lvl_pages); | |
2319 | BUG_ON(sg_res < lvl_pages); | |
2320 | ||
2321 | nr_pages -= lvl_pages; | |
2322 | iov_pfn += lvl_pages; | |
2323 | phys_pfn += lvl_pages; | |
2324 | pteval += lvl_pages * VTD_PAGE_SIZE; | |
2325 | sg_res -= lvl_pages; | |
2326 | ||
2327 | /* If the next PTE would be the first in a new page, then we | |
2328 | need to flush the cache on the entries we've just written. | |
2329 | And then we'll need to recalculate 'pte', so clear it and | |
2330 | let it get set again in the if (!pte) block above. | |
2331 | ||
2332 | If we're done (!nr_pages) we need to flush the cache too. | |
2333 | ||
2334 | Also if we've been setting superpages, we may need to | |
2335 | recalculate 'pte' and switch back to smaller pages for the | |
2336 | end of the mapping, if the trailing size is not enough to | |
2337 | use another superpage (i.e. sg_res < lvl_pages). */ | |
e1605495 | 2338 | pte++; |
6dd9a7c7 YS |
2339 | if (!nr_pages || first_pte_in_page(pte) || |
2340 | (largepage_lvl > 1 && sg_res < lvl_pages)) { | |
e1605495 DW |
2341 | domain_flush_cache(domain, first_pte, |
2342 | (void *)pte - (void *)first_pte); | |
2343 | pte = NULL; | |
2344 | } | |
6dd9a7c7 YS |
2345 | |
2346 | if (!sg_res && nr_pages) | |
e1605495 DW |
2347 | sg = sg_next(sg); |
2348 | } | |
2349 | return 0; | |
2350 | } | |
2351 | ||
9051aa02 DW |
2352 | static inline int domain_sg_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
2353 | struct scatterlist *sg, unsigned long nr_pages, | |
2354 | int prot) | |
ba395927 | 2355 | { |
9051aa02 DW |
2356 | return __domain_mapping(domain, iov_pfn, sg, 0, nr_pages, prot); |
2357 | } | |
6f6a00e4 | 2358 | |
9051aa02 DW |
2359 | static inline int domain_pfn_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
2360 | unsigned long phys_pfn, unsigned long nr_pages, | |
2361 | int prot) | |
2362 | { | |
2363 | return __domain_mapping(domain, iov_pfn, NULL, phys_pfn, nr_pages, prot); | |
ba395927 KA |
2364 | } |
2365 | ||
2452d9db | 2366 | static void domain_context_clear_one(struct intel_iommu *iommu, u8 bus, u8 devfn) |
ba395927 | 2367 | { |
c7151a8d WH |
2368 | if (!iommu) |
2369 | return; | |
8c11e798 WH |
2370 | |
2371 | clear_context_table(iommu, bus, devfn); | |
2372 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
4c25a2c1 | 2373 | DMA_CCMD_GLOBAL_INVL); |
1f0ef2aa | 2374 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); |
ba395927 KA |
2375 | } |
2376 | ||
109b9b04 DW |
2377 | static inline void unlink_domain_info(struct device_domain_info *info) |
2378 | { | |
2379 | assert_spin_locked(&device_domain_lock); | |
2380 | list_del(&info->link); | |
2381 | list_del(&info->global); | |
2382 | if (info->dev) | |
0bcb3e28 | 2383 | info->dev->archdata.iommu = NULL; |
109b9b04 DW |
2384 | } |
2385 | ||
ba395927 KA |
2386 | static void domain_remove_dev_info(struct dmar_domain *domain) |
2387 | { | |
3a74ca01 | 2388 | struct device_domain_info *info, *tmp; |
fb170fb4 | 2389 | unsigned long flags; |
ba395927 KA |
2390 | |
2391 | spin_lock_irqsave(&device_domain_lock, flags); | |
76f45fe3 | 2392 | list_for_each_entry_safe(info, tmp, &domain->devices, link) |
127c7615 | 2393 | __dmar_remove_one_dev_info(info); |
ba395927 KA |
2394 | spin_unlock_irqrestore(&device_domain_lock, flags); |
2395 | } | |
2396 | ||
2397 | /* | |
2398 | * find_domain | |
1525a29a | 2399 | * Note: we use struct device->archdata.iommu stores the info |
ba395927 | 2400 | */ |
1525a29a | 2401 | static struct dmar_domain *find_domain(struct device *dev) |
ba395927 KA |
2402 | { |
2403 | struct device_domain_info *info; | |
2404 | ||
2405 | /* No lock here, assumes no domain exit in normal case */ | |
1525a29a | 2406 | info = dev->archdata.iommu; |
ba395927 KA |
2407 | if (info) |
2408 | return info->domain; | |
2409 | return NULL; | |
2410 | } | |
2411 | ||
5a8f40e8 | 2412 | static inline struct device_domain_info * |
745f2586 JL |
2413 | dmar_search_domain_by_dev_info(int segment, int bus, int devfn) |
2414 | { | |
2415 | struct device_domain_info *info; | |
2416 | ||
2417 | list_for_each_entry(info, &device_domain_list, global) | |
41e80dca | 2418 | if (info->iommu->segment == segment && info->bus == bus && |
745f2586 | 2419 | info->devfn == devfn) |
5a8f40e8 | 2420 | return info; |
745f2586 JL |
2421 | |
2422 | return NULL; | |
2423 | } | |
2424 | ||
5db31569 JR |
2425 | static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu, |
2426 | int bus, int devfn, | |
2427 | struct device *dev, | |
2428 | struct dmar_domain *domain) | |
745f2586 | 2429 | { |
5a8f40e8 | 2430 | struct dmar_domain *found = NULL; |
745f2586 JL |
2431 | struct device_domain_info *info; |
2432 | unsigned long flags; | |
d160aca5 | 2433 | int ret; |
745f2586 JL |
2434 | |
2435 | info = alloc_devinfo_mem(); | |
2436 | if (!info) | |
b718cd3d | 2437 | return NULL; |
745f2586 | 2438 | |
745f2586 JL |
2439 | info->bus = bus; |
2440 | info->devfn = devfn; | |
b16d0cb9 DW |
2441 | info->ats_supported = info->pasid_supported = info->pri_supported = 0; |
2442 | info->ats_enabled = info->pasid_enabled = info->pri_enabled = 0; | |
2443 | info->ats_qdep = 0; | |
745f2586 JL |
2444 | info->dev = dev; |
2445 | info->domain = domain; | |
5a8f40e8 | 2446 | info->iommu = iommu; |
745f2586 | 2447 | |
b16d0cb9 DW |
2448 | if (dev && dev_is_pci(dev)) { |
2449 | struct pci_dev *pdev = to_pci_dev(info->dev); | |
2450 | ||
2451 | if (ecap_dev_iotlb_support(iommu->ecap) && | |
2452 | pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ATS) && | |
2453 | dmar_find_matched_atsr_unit(pdev)) | |
2454 | info->ats_supported = 1; | |
2455 | ||
2456 | if (ecs_enabled(iommu)) { | |
2457 | if (pasid_enabled(iommu)) { | |
2458 | int features = pci_pasid_features(pdev); | |
2459 | if (features >= 0) | |
2460 | info->pasid_supported = features | 1; | |
2461 | } | |
2462 | ||
2463 | if (info->ats_supported && ecap_prs(iommu->ecap) && | |
2464 | pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI)) | |
2465 | info->pri_supported = 1; | |
2466 | } | |
2467 | } | |
2468 | ||
745f2586 JL |
2469 | spin_lock_irqsave(&device_domain_lock, flags); |
2470 | if (dev) | |
0bcb3e28 | 2471 | found = find_domain(dev); |
f303e507 JR |
2472 | |
2473 | if (!found) { | |
5a8f40e8 | 2474 | struct device_domain_info *info2; |
41e80dca | 2475 | info2 = dmar_search_domain_by_dev_info(iommu->segment, bus, devfn); |
f303e507 JR |
2476 | if (info2) { |
2477 | found = info2->domain; | |
2478 | info2->dev = dev; | |
2479 | } | |
5a8f40e8 | 2480 | } |
f303e507 | 2481 | |
745f2586 JL |
2482 | if (found) { |
2483 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
2484 | free_devinfo_mem(info); | |
b718cd3d DW |
2485 | /* Caller must free the original domain */ |
2486 | return found; | |
745f2586 JL |
2487 | } |
2488 | ||
d160aca5 JR |
2489 | spin_lock(&iommu->lock); |
2490 | ret = domain_attach_iommu(domain, iommu); | |
2491 | spin_unlock(&iommu->lock); | |
2492 | ||
2493 | if (ret) { | |
c6c2cebd | 2494 | spin_unlock_irqrestore(&device_domain_lock, flags); |
499f3aa4 | 2495 | free_devinfo_mem(info); |
c6c2cebd JR |
2496 | return NULL; |
2497 | } | |
c6c2cebd | 2498 | |
b718cd3d DW |
2499 | list_add(&info->link, &domain->devices); |
2500 | list_add(&info->global, &device_domain_list); | |
2501 | if (dev) | |
2502 | dev->archdata.iommu = info; | |
2503 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
2504 | ||
cc4e2575 JR |
2505 | if (dev && domain_context_mapping(domain, dev)) { |
2506 | pr_err("Domain context map for %s failed\n", dev_name(dev)); | |
e6de0f8d | 2507 | dmar_remove_one_dev_info(domain, dev); |
cc4e2575 JR |
2508 | return NULL; |
2509 | } | |
2510 | ||
b718cd3d | 2511 | return domain; |
745f2586 JL |
2512 | } |
2513 | ||
579305f7 AW |
2514 | static int get_last_alias(struct pci_dev *pdev, u16 alias, void *opaque) |
2515 | { | |
2516 | *(u16 *)opaque = alias; | |
2517 | return 0; | |
2518 | } | |
2519 | ||
76208356 | 2520 | static struct dmar_domain *find_or_alloc_domain(struct device *dev, int gaw) |
ba395927 | 2521 | { |
cc4e2575 | 2522 | struct device_domain_info *info = NULL; |
76208356 | 2523 | struct dmar_domain *domain = NULL; |
579305f7 | 2524 | struct intel_iommu *iommu; |
08a7f456 | 2525 | u16 req_id, dma_alias; |
ba395927 | 2526 | unsigned long flags; |
aa4d066a | 2527 | u8 bus, devfn; |
ba395927 | 2528 | |
579305f7 AW |
2529 | iommu = device_to_iommu(dev, &bus, &devfn); |
2530 | if (!iommu) | |
2531 | return NULL; | |
2532 | ||
08a7f456 JR |
2533 | req_id = ((u16)bus << 8) | devfn; |
2534 | ||
146922ec DW |
2535 | if (dev_is_pci(dev)) { |
2536 | struct pci_dev *pdev = to_pci_dev(dev); | |
276dbf99 | 2537 | |
579305f7 AW |
2538 | pci_for_each_dma_alias(pdev, get_last_alias, &dma_alias); |
2539 | ||
2540 | spin_lock_irqsave(&device_domain_lock, flags); | |
2541 | info = dmar_search_domain_by_dev_info(pci_domain_nr(pdev->bus), | |
2542 | PCI_BUS_NUM(dma_alias), | |
2543 | dma_alias & 0xff); | |
2544 | if (info) { | |
2545 | iommu = info->iommu; | |
2546 | domain = info->domain; | |
5a8f40e8 | 2547 | } |
579305f7 | 2548 | spin_unlock_irqrestore(&device_domain_lock, flags); |
ba395927 | 2549 | |
76208356 | 2550 | /* DMA alias already has a domain, use it */ |
579305f7 | 2551 | if (info) |
76208356 | 2552 | goto out; |
579305f7 | 2553 | } |
ba395927 | 2554 | |
146922ec | 2555 | /* Allocate and initialize new domain for the device */ |
ab8dfe25 | 2556 | domain = alloc_domain(0); |
745f2586 | 2557 | if (!domain) |
579305f7 | 2558 | return NULL; |
dc534b25 | 2559 | if (domain_init(domain, iommu, gaw)) { |
579305f7 AW |
2560 | domain_exit(domain); |
2561 | return NULL; | |
2c2e2c38 | 2562 | } |
ba395927 | 2563 | |
76208356 | 2564 | out: |
579305f7 | 2565 | |
76208356 JR |
2566 | return domain; |
2567 | } | |
579305f7 | 2568 | |
76208356 JR |
2569 | static struct dmar_domain *set_domain_for_dev(struct device *dev, |
2570 | struct dmar_domain *domain) | |
2571 | { | |
2572 | struct intel_iommu *iommu; | |
2573 | struct dmar_domain *tmp; | |
2574 | u16 req_id, dma_alias; | |
2575 | u8 bus, devfn; | |
2576 | ||
2577 | iommu = device_to_iommu(dev, &bus, &devfn); | |
2578 | if (!iommu) | |
2579 | return NULL; | |
2580 | ||
2581 | req_id = ((u16)bus << 8) | devfn; | |
2582 | ||
2583 | if (dev_is_pci(dev)) { | |
2584 | struct pci_dev *pdev = to_pci_dev(dev); | |
2585 | ||
2586 | pci_for_each_dma_alias(pdev, get_last_alias, &dma_alias); | |
2587 | ||
2588 | /* register PCI DMA alias device */ | |
2589 | if (req_id != dma_alias) { | |
2590 | tmp = dmar_insert_one_dev_info(iommu, PCI_BUS_NUM(dma_alias), | |
2591 | dma_alias & 0xff, NULL, domain); | |
2592 | ||
2593 | if (!tmp || tmp != domain) | |
2594 | return tmp; | |
2595 | } | |
ba395927 KA |
2596 | } |
2597 | ||
5db31569 | 2598 | tmp = dmar_insert_one_dev_info(iommu, bus, devfn, dev, domain); |
76208356 JR |
2599 | if (!tmp || tmp != domain) |
2600 | return tmp; | |
2601 | ||
2602 | return domain; | |
2603 | } | |
579305f7 | 2604 | |
76208356 JR |
2605 | static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw) |
2606 | { | |
2607 | struct dmar_domain *domain, *tmp; | |
2608 | ||
2609 | domain = find_domain(dev); | |
2610 | if (domain) | |
2611 | goto out; | |
2612 | ||
2613 | domain = find_or_alloc_domain(dev, gaw); | |
2614 | if (!domain) | |
2615 | goto out; | |
2616 | ||
2617 | tmp = set_domain_for_dev(dev, domain); | |
2618 | if (!tmp || domain != tmp) { | |
579305f7 AW |
2619 | domain_exit(domain); |
2620 | domain = tmp; | |
2621 | } | |
b718cd3d | 2622 | |
76208356 JR |
2623 | out: |
2624 | ||
b718cd3d | 2625 | return domain; |
ba395927 KA |
2626 | } |
2627 | ||
b213203e DW |
2628 | static int iommu_domain_identity_map(struct dmar_domain *domain, |
2629 | unsigned long long start, | |
2630 | unsigned long long end) | |
ba395927 | 2631 | { |
c5395d5c DW |
2632 | unsigned long first_vpfn = start >> VTD_PAGE_SHIFT; |
2633 | unsigned long last_vpfn = end >> VTD_PAGE_SHIFT; | |
2634 | ||
2635 | if (!reserve_iova(&domain->iovad, dma_to_mm_pfn(first_vpfn), | |
2636 | dma_to_mm_pfn(last_vpfn))) { | |
9f10e5bf | 2637 | pr_err("Reserving iova failed\n"); |
b213203e | 2638 | return -ENOMEM; |
ba395927 KA |
2639 | } |
2640 | ||
af1089ce | 2641 | pr_debug("Mapping reserved region %llx-%llx\n", start, end); |
ba395927 KA |
2642 | /* |
2643 | * RMRR range might have overlap with physical memory range, | |
2644 | * clear it first | |
2645 | */ | |
c5395d5c | 2646 | dma_pte_clear_range(domain, first_vpfn, last_vpfn); |
ba395927 | 2647 | |
c5395d5c DW |
2648 | return domain_pfn_mapping(domain, first_vpfn, first_vpfn, |
2649 | last_vpfn - first_vpfn + 1, | |
61df7443 | 2650 | DMA_PTE_READ|DMA_PTE_WRITE); |
b213203e DW |
2651 | } |
2652 | ||
d66ce54b JR |
2653 | static int domain_prepare_identity_map(struct device *dev, |
2654 | struct dmar_domain *domain, | |
2655 | unsigned long long start, | |
2656 | unsigned long long end) | |
b213203e | 2657 | { |
19943b0e DW |
2658 | /* For _hardware_ passthrough, don't bother. But for software |
2659 | passthrough, we do it anyway -- it may indicate a memory | |
2660 | range which is reserved in E820, so which didn't get set | |
2661 | up to start with in si_domain */ | |
2662 | if (domain == si_domain && hw_pass_through) { | |
9f10e5bf JR |
2663 | pr_warn("Ignoring identity map for HW passthrough device %s [0x%Lx - 0x%Lx]\n", |
2664 | dev_name(dev), start, end); | |
19943b0e DW |
2665 | return 0; |
2666 | } | |
2667 | ||
9f10e5bf JR |
2668 | pr_info("Setting identity map for device %s [0x%Lx - 0x%Lx]\n", |
2669 | dev_name(dev), start, end); | |
2670 | ||
5595b528 DW |
2671 | if (end < start) { |
2672 | WARN(1, "Your BIOS is broken; RMRR ends before it starts!\n" | |
2673 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
2674 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
2675 | dmi_get_system_info(DMI_BIOS_VERSION), | |
2676 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
d66ce54b | 2677 | return -EIO; |
5595b528 DW |
2678 | } |
2679 | ||
2ff729f5 DW |
2680 | if (end >> agaw_to_width(domain->agaw)) { |
2681 | WARN(1, "Your BIOS is broken; RMRR exceeds permitted address width (%d bits)\n" | |
2682 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
2683 | agaw_to_width(domain->agaw), | |
2684 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
2685 | dmi_get_system_info(DMI_BIOS_VERSION), | |
2686 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
d66ce54b | 2687 | return -EIO; |
2ff729f5 | 2688 | } |
19943b0e | 2689 | |
d66ce54b JR |
2690 | return iommu_domain_identity_map(domain, start, end); |
2691 | } | |
ba395927 | 2692 | |
d66ce54b JR |
2693 | static int iommu_prepare_identity_map(struct device *dev, |
2694 | unsigned long long start, | |
2695 | unsigned long long end) | |
2696 | { | |
2697 | struct dmar_domain *domain; | |
2698 | int ret; | |
2699 | ||
2700 | domain = get_domain_for_dev(dev, DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
2701 | if (!domain) | |
2702 | return -ENOMEM; | |
2703 | ||
2704 | ret = domain_prepare_identity_map(dev, domain, start, end); | |
2705 | if (ret) | |
2706 | domain_exit(domain); | |
b213203e | 2707 | |
ba395927 | 2708 | return ret; |
ba395927 KA |
2709 | } |
2710 | ||
2711 | static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr, | |
0b9d9753 | 2712 | struct device *dev) |
ba395927 | 2713 | { |
0b9d9753 | 2714 | if (dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO) |
ba395927 | 2715 | return 0; |
0b9d9753 DW |
2716 | return iommu_prepare_identity_map(dev, rmrr->base_address, |
2717 | rmrr->end_address); | |
ba395927 KA |
2718 | } |
2719 | ||
d3f13810 | 2720 | #ifdef CONFIG_INTEL_IOMMU_FLOPPY_WA |
49a0429e KA |
2721 | static inline void iommu_prepare_isa(void) |
2722 | { | |
2723 | struct pci_dev *pdev; | |
2724 | int ret; | |
2725 | ||
2726 | pdev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL); | |
2727 | if (!pdev) | |
2728 | return; | |
2729 | ||
9f10e5bf | 2730 | pr_info("Prepare 0-16MiB unity mapping for LPC\n"); |
0b9d9753 | 2731 | ret = iommu_prepare_identity_map(&pdev->dev, 0, 16*1024*1024 - 1); |
49a0429e KA |
2732 | |
2733 | if (ret) | |
9f10e5bf | 2734 | pr_err("Failed to create 0-16MiB identity map - floppy might not work\n"); |
49a0429e | 2735 | |
9b27e82d | 2736 | pci_dev_put(pdev); |
49a0429e KA |
2737 | } |
2738 | #else | |
2739 | static inline void iommu_prepare_isa(void) | |
2740 | { | |
2741 | return; | |
2742 | } | |
d3f13810 | 2743 | #endif /* !CONFIG_INTEL_IOMMU_FLPY_WA */ |
49a0429e | 2744 | |
2c2e2c38 | 2745 | static int md_domain_init(struct dmar_domain *domain, int guest_width); |
c7ab48d2 | 2746 | |
071e1374 | 2747 | static int __init si_domain_init(int hw) |
2c2e2c38 | 2748 | { |
c7ab48d2 | 2749 | int nid, ret = 0; |
2c2e2c38 | 2750 | |
ab8dfe25 | 2751 | si_domain = alloc_domain(DOMAIN_FLAG_STATIC_IDENTITY); |
2c2e2c38 FY |
2752 | if (!si_domain) |
2753 | return -EFAULT; | |
2754 | ||
2c2e2c38 FY |
2755 | if (md_domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { |
2756 | domain_exit(si_domain); | |
2757 | return -EFAULT; | |
2758 | } | |
2759 | ||
0dc79715 | 2760 | pr_debug("Identity mapping domain allocated\n"); |
2c2e2c38 | 2761 | |
19943b0e DW |
2762 | if (hw) |
2763 | return 0; | |
2764 | ||
c7ab48d2 | 2765 | for_each_online_node(nid) { |
5dfe8660 TH |
2766 | unsigned long start_pfn, end_pfn; |
2767 | int i; | |
2768 | ||
2769 | for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) { | |
2770 | ret = iommu_domain_identity_map(si_domain, | |
2771 | PFN_PHYS(start_pfn), PFN_PHYS(end_pfn)); | |
2772 | if (ret) | |
2773 | return ret; | |
2774 | } | |
c7ab48d2 DW |
2775 | } |
2776 | ||
2c2e2c38 FY |
2777 | return 0; |
2778 | } | |
2779 | ||
9b226624 | 2780 | static int identity_mapping(struct device *dev) |
2c2e2c38 FY |
2781 | { |
2782 | struct device_domain_info *info; | |
2783 | ||
2784 | if (likely(!iommu_identity_mapping)) | |
2785 | return 0; | |
2786 | ||
9b226624 | 2787 | info = dev->archdata.iommu; |
cb452a40 MT |
2788 | if (info && info != DUMMY_DEVICE_DOMAIN_INFO) |
2789 | return (info->domain == si_domain); | |
2c2e2c38 | 2790 | |
2c2e2c38 FY |
2791 | return 0; |
2792 | } | |
2793 | ||
28ccce0d | 2794 | static int domain_add_dev_info(struct dmar_domain *domain, struct device *dev) |
2c2e2c38 | 2795 | { |
0ac72664 | 2796 | struct dmar_domain *ndomain; |
5a8f40e8 | 2797 | struct intel_iommu *iommu; |
156baca8 | 2798 | u8 bus, devfn; |
2c2e2c38 | 2799 | |
5913c9bf | 2800 | iommu = device_to_iommu(dev, &bus, &devfn); |
5a8f40e8 DW |
2801 | if (!iommu) |
2802 | return -ENODEV; | |
2803 | ||
5db31569 | 2804 | ndomain = dmar_insert_one_dev_info(iommu, bus, devfn, dev, domain); |
0ac72664 DW |
2805 | if (ndomain != domain) |
2806 | return -EBUSY; | |
2c2e2c38 FY |
2807 | |
2808 | return 0; | |
2809 | } | |
2810 | ||
0b9d9753 | 2811 | static bool device_has_rmrr(struct device *dev) |
ea2447f7 TM |
2812 | { |
2813 | struct dmar_rmrr_unit *rmrr; | |
832bd858 | 2814 | struct device *tmp; |
ea2447f7 TM |
2815 | int i; |
2816 | ||
0e242612 | 2817 | rcu_read_lock(); |
ea2447f7 | 2818 | for_each_rmrr_units(rmrr) { |
b683b230 JL |
2819 | /* |
2820 | * Return TRUE if this RMRR contains the device that | |
2821 | * is passed in. | |
2822 | */ | |
2823 | for_each_active_dev_scope(rmrr->devices, | |
2824 | rmrr->devices_cnt, i, tmp) | |
0b9d9753 | 2825 | if (tmp == dev) { |
0e242612 | 2826 | rcu_read_unlock(); |
ea2447f7 | 2827 | return true; |
b683b230 | 2828 | } |
ea2447f7 | 2829 | } |
0e242612 | 2830 | rcu_read_unlock(); |
ea2447f7 TM |
2831 | return false; |
2832 | } | |
2833 | ||
c875d2c1 AW |
2834 | /* |
2835 | * There are a couple cases where we need to restrict the functionality of | |
2836 | * devices associated with RMRRs. The first is when evaluating a device for | |
2837 | * identity mapping because problems exist when devices are moved in and out | |
2838 | * of domains and their respective RMRR information is lost. This means that | |
2839 | * a device with associated RMRRs will never be in a "passthrough" domain. | |
2840 | * The second is use of the device through the IOMMU API. This interface | |
2841 | * expects to have full control of the IOVA space for the device. We cannot | |
2842 | * satisfy both the requirement that RMRR access is maintained and have an | |
2843 | * unencumbered IOVA space. We also have no ability to quiesce the device's | |
2844 | * use of the RMRR space or even inform the IOMMU API user of the restriction. | |
2845 | * We therefore prevent devices associated with an RMRR from participating in | |
2846 | * the IOMMU API, which eliminates them from device assignment. | |
2847 | * | |
2848 | * In both cases we assume that PCI USB devices with RMRRs have them largely | |
2849 | * for historical reasons and that the RMRR space is not actively used post | |
2850 | * boot. This exclusion may change if vendors begin to abuse it. | |
18436afd DW |
2851 | * |
2852 | * The same exception is made for graphics devices, with the requirement that | |
2853 | * any use of the RMRR regions will be torn down before assigning the device | |
2854 | * to a guest. | |
c875d2c1 AW |
2855 | */ |
2856 | static bool device_is_rmrr_locked(struct device *dev) | |
2857 | { | |
2858 | if (!device_has_rmrr(dev)) | |
2859 | return false; | |
2860 | ||
2861 | if (dev_is_pci(dev)) { | |
2862 | struct pci_dev *pdev = to_pci_dev(dev); | |
2863 | ||
18436afd | 2864 | if (IS_USB_DEVICE(pdev) || IS_GFX_DEVICE(pdev)) |
c875d2c1 AW |
2865 | return false; |
2866 | } | |
2867 | ||
2868 | return true; | |
2869 | } | |
2870 | ||
3bdb2591 | 2871 | static int iommu_should_identity_map(struct device *dev, int startup) |
6941af28 | 2872 | { |
ea2447f7 | 2873 | |
3bdb2591 DW |
2874 | if (dev_is_pci(dev)) { |
2875 | struct pci_dev *pdev = to_pci_dev(dev); | |
ea2447f7 | 2876 | |
c875d2c1 | 2877 | if (device_is_rmrr_locked(dev)) |
3bdb2591 | 2878 | return 0; |
e0fc7e0b | 2879 | |
3bdb2591 DW |
2880 | if ((iommu_identity_mapping & IDENTMAP_AZALIA) && IS_AZALIA(pdev)) |
2881 | return 1; | |
e0fc7e0b | 2882 | |
3bdb2591 DW |
2883 | if ((iommu_identity_mapping & IDENTMAP_GFX) && IS_GFX_DEVICE(pdev)) |
2884 | return 1; | |
6941af28 | 2885 | |
3bdb2591 | 2886 | if (!(iommu_identity_mapping & IDENTMAP_ALL)) |
3dfc813d | 2887 | return 0; |
3bdb2591 DW |
2888 | |
2889 | /* | |
2890 | * We want to start off with all devices in the 1:1 domain, and | |
2891 | * take them out later if we find they can't access all of memory. | |
2892 | * | |
2893 | * However, we can't do this for PCI devices behind bridges, | |
2894 | * because all PCI devices behind the same bridge will end up | |
2895 | * with the same source-id on their transactions. | |
2896 | * | |
2897 | * Practically speaking, we can't change things around for these | |
2898 | * devices at run-time, because we can't be sure there'll be no | |
2899 | * DMA transactions in flight for any of their siblings. | |
2900 | * | |
2901 | * So PCI devices (unless they're on the root bus) as well as | |
2902 | * their parent PCI-PCI or PCIe-PCI bridges must be left _out_ of | |
2903 | * the 1:1 domain, just in _case_ one of their siblings turns out | |
2904 | * not to be able to map all of memory. | |
2905 | */ | |
2906 | if (!pci_is_pcie(pdev)) { | |
2907 | if (!pci_is_root_bus(pdev->bus)) | |
2908 | return 0; | |
2909 | if (pdev->class >> 8 == PCI_CLASS_BRIDGE_PCI) | |
2910 | return 0; | |
2911 | } else if (pci_pcie_type(pdev) == PCI_EXP_TYPE_PCI_BRIDGE) | |
3dfc813d | 2912 | return 0; |
3bdb2591 DW |
2913 | } else { |
2914 | if (device_has_rmrr(dev)) | |
2915 | return 0; | |
2916 | } | |
3dfc813d | 2917 | |
3bdb2591 | 2918 | /* |
3dfc813d | 2919 | * At boot time, we don't yet know if devices will be 64-bit capable. |
3bdb2591 | 2920 | * Assume that they will — if they turn out not to be, then we can |
3dfc813d DW |
2921 | * take them out of the 1:1 domain later. |
2922 | */ | |
8fcc5372 CW |
2923 | if (!startup) { |
2924 | /* | |
2925 | * If the device's dma_mask is less than the system's memory | |
2926 | * size then this is not a candidate for identity mapping. | |
2927 | */ | |
3bdb2591 | 2928 | u64 dma_mask = *dev->dma_mask; |
8fcc5372 | 2929 | |
3bdb2591 DW |
2930 | if (dev->coherent_dma_mask && |
2931 | dev->coherent_dma_mask < dma_mask) | |
2932 | dma_mask = dev->coherent_dma_mask; | |
8fcc5372 | 2933 | |
3bdb2591 | 2934 | return dma_mask >= dma_get_required_mask(dev); |
8fcc5372 | 2935 | } |
6941af28 DW |
2936 | |
2937 | return 1; | |
2938 | } | |
2939 | ||
cf04eee8 DW |
2940 | static int __init dev_prepare_static_identity_mapping(struct device *dev, int hw) |
2941 | { | |
2942 | int ret; | |
2943 | ||
2944 | if (!iommu_should_identity_map(dev, 1)) | |
2945 | return 0; | |
2946 | ||
28ccce0d | 2947 | ret = domain_add_dev_info(si_domain, dev); |
cf04eee8 | 2948 | if (!ret) |
9f10e5bf JR |
2949 | pr_info("%s identity mapping for device %s\n", |
2950 | hw ? "Hardware" : "Software", dev_name(dev)); | |
cf04eee8 DW |
2951 | else if (ret == -ENODEV) |
2952 | /* device not associated with an iommu */ | |
2953 | ret = 0; | |
2954 | ||
2955 | return ret; | |
2956 | } | |
2957 | ||
2958 | ||
071e1374 | 2959 | static int __init iommu_prepare_static_identity_mapping(int hw) |
2c2e2c38 | 2960 | { |
2c2e2c38 | 2961 | struct pci_dev *pdev = NULL; |
cf04eee8 DW |
2962 | struct dmar_drhd_unit *drhd; |
2963 | struct intel_iommu *iommu; | |
2964 | struct device *dev; | |
2965 | int i; | |
2966 | int ret = 0; | |
2c2e2c38 | 2967 | |
2c2e2c38 | 2968 | for_each_pci_dev(pdev) { |
cf04eee8 DW |
2969 | ret = dev_prepare_static_identity_mapping(&pdev->dev, hw); |
2970 | if (ret) | |
2971 | return ret; | |
2972 | } | |
2973 | ||
2974 | for_each_active_iommu(iommu, drhd) | |
2975 | for_each_active_dev_scope(drhd->devices, drhd->devices_cnt, i, dev) { | |
2976 | struct acpi_device_physical_node *pn; | |
2977 | struct acpi_device *adev; | |
2978 | ||
2979 | if (dev->bus != &acpi_bus_type) | |
2980 | continue; | |
86080ccc | 2981 | |
cf04eee8 DW |
2982 | adev= to_acpi_device(dev); |
2983 | mutex_lock(&adev->physical_node_lock); | |
2984 | list_for_each_entry(pn, &adev->physical_node_list, node) { | |
2985 | ret = dev_prepare_static_identity_mapping(pn->dev, hw); | |
2986 | if (ret) | |
2987 | break; | |
eae460b6 | 2988 | } |
cf04eee8 DW |
2989 | mutex_unlock(&adev->physical_node_lock); |
2990 | if (ret) | |
2991 | return ret; | |
62edf5dc | 2992 | } |
2c2e2c38 FY |
2993 | |
2994 | return 0; | |
2995 | } | |
2996 | ||
ffebeb46 JL |
2997 | static void intel_iommu_init_qi(struct intel_iommu *iommu) |
2998 | { | |
2999 | /* | |
3000 | * Start from the sane iommu hardware state. | |
3001 | * If the queued invalidation is already initialized by us | |
3002 | * (for example, while enabling interrupt-remapping) then | |
3003 | * we got the things already rolling from a sane state. | |
3004 | */ | |
3005 | if (!iommu->qi) { | |
3006 | /* | |
3007 | * Clear any previous faults. | |
3008 | */ | |
3009 | dmar_fault(-1, iommu); | |
3010 | /* | |
3011 | * Disable queued invalidation if supported and already enabled | |
3012 | * before OS handover. | |
3013 | */ | |
3014 | dmar_disable_qi(iommu); | |
3015 | } | |
3016 | ||
3017 | if (dmar_enable_qi(iommu)) { | |
3018 | /* | |
3019 | * Queued Invalidate not enabled, use Register Based Invalidate | |
3020 | */ | |
3021 | iommu->flush.flush_context = __iommu_flush_context; | |
3022 | iommu->flush.flush_iotlb = __iommu_flush_iotlb; | |
9f10e5bf | 3023 | pr_info("%s: Using Register based invalidation\n", |
ffebeb46 JL |
3024 | iommu->name); |
3025 | } else { | |
3026 | iommu->flush.flush_context = qi_flush_context; | |
3027 | iommu->flush.flush_iotlb = qi_flush_iotlb; | |
9f10e5bf | 3028 | pr_info("%s: Using Queued invalidation\n", iommu->name); |
ffebeb46 JL |
3029 | } |
3030 | } | |
3031 | ||
091d42e4 | 3032 | static int copy_context_table(struct intel_iommu *iommu, |
dfddb969 | 3033 | struct root_entry *old_re, |
091d42e4 JR |
3034 | struct context_entry **tbl, |
3035 | int bus, bool ext) | |
3036 | { | |
dbcd861f | 3037 | int tbl_idx, pos = 0, idx, devfn, ret = 0, did; |
543c8dcf | 3038 | struct context_entry *new_ce = NULL, ce; |
dfddb969 | 3039 | struct context_entry *old_ce = NULL; |
543c8dcf | 3040 | struct root_entry re; |
091d42e4 JR |
3041 | phys_addr_t old_ce_phys; |
3042 | ||
3043 | tbl_idx = ext ? bus * 2 : bus; | |
dfddb969 | 3044 | memcpy(&re, old_re, sizeof(re)); |
091d42e4 JR |
3045 | |
3046 | for (devfn = 0; devfn < 256; devfn++) { | |
3047 | /* First calculate the correct index */ | |
3048 | idx = (ext ? devfn * 2 : devfn) % 256; | |
3049 | ||
3050 | if (idx == 0) { | |
3051 | /* First save what we may have and clean up */ | |
3052 | if (new_ce) { | |
3053 | tbl[tbl_idx] = new_ce; | |
3054 | __iommu_flush_cache(iommu, new_ce, | |
3055 | VTD_PAGE_SIZE); | |
3056 | pos = 1; | |
3057 | } | |
3058 | ||
3059 | if (old_ce) | |
782d0b84 | 3060 | memunmap(old_ce); |
091d42e4 JR |
3061 | |
3062 | ret = 0; | |
3063 | if (devfn < 0x80) | |
543c8dcf | 3064 | old_ce_phys = root_entry_lctp(&re); |
091d42e4 | 3065 | else |
543c8dcf | 3066 | old_ce_phys = root_entry_uctp(&re); |
091d42e4 JR |
3067 | |
3068 | if (!old_ce_phys) { | |
3069 | if (ext && devfn == 0) { | |
3070 | /* No LCTP, try UCTP */ | |
3071 | devfn = 0x7f; | |
3072 | continue; | |
3073 | } else { | |
3074 | goto out; | |
3075 | } | |
3076 | } | |
3077 | ||
3078 | ret = -ENOMEM; | |
dfddb969 DW |
3079 | old_ce = memremap(old_ce_phys, PAGE_SIZE, |
3080 | MEMREMAP_WB); | |
091d42e4 JR |
3081 | if (!old_ce) |
3082 | goto out; | |
3083 | ||
3084 | new_ce = alloc_pgtable_page(iommu->node); | |
3085 | if (!new_ce) | |
3086 | goto out_unmap; | |
3087 | ||
3088 | ret = 0; | |
3089 | } | |
3090 | ||
3091 | /* Now copy the context entry */ | |
dfddb969 | 3092 | memcpy(&ce, old_ce + idx, sizeof(ce)); |
091d42e4 | 3093 | |
cf484d0e | 3094 | if (!__context_present(&ce)) |
091d42e4 JR |
3095 | continue; |
3096 | ||
dbcd861f JR |
3097 | did = context_domain_id(&ce); |
3098 | if (did >= 0 && did < cap_ndoms(iommu->cap)) | |
3099 | set_bit(did, iommu->domain_ids); | |
3100 | ||
cf484d0e JR |
3101 | /* |
3102 | * We need a marker for copied context entries. This | |
3103 | * marker needs to work for the old format as well as | |
3104 | * for extended context entries. | |
3105 | * | |
3106 | * Bit 67 of the context entry is used. In the old | |
3107 | * format this bit is available to software, in the | |
3108 | * extended format it is the PGE bit, but PGE is ignored | |
3109 | * by HW if PASIDs are disabled (and thus still | |
3110 | * available). | |
3111 | * | |
3112 | * So disable PASIDs first and then mark the entry | |
3113 | * copied. This means that we don't copy PASID | |
3114 | * translations from the old kernel, but this is fine as | |
3115 | * faults there are not fatal. | |
3116 | */ | |
3117 | context_clear_pasid_enable(&ce); | |
3118 | context_set_copied(&ce); | |
3119 | ||
091d42e4 JR |
3120 | new_ce[idx] = ce; |
3121 | } | |
3122 | ||
3123 | tbl[tbl_idx + pos] = new_ce; | |
3124 | ||
3125 | __iommu_flush_cache(iommu, new_ce, VTD_PAGE_SIZE); | |
3126 | ||
3127 | out_unmap: | |
dfddb969 | 3128 | memunmap(old_ce); |
091d42e4 JR |
3129 | |
3130 | out: | |
3131 | return ret; | |
3132 | } | |
3133 | ||
3134 | static int copy_translation_tables(struct intel_iommu *iommu) | |
3135 | { | |
3136 | struct context_entry **ctxt_tbls; | |
dfddb969 | 3137 | struct root_entry *old_rt; |
091d42e4 JR |
3138 | phys_addr_t old_rt_phys; |
3139 | int ctxt_table_entries; | |
3140 | unsigned long flags; | |
3141 | u64 rtaddr_reg; | |
3142 | int bus, ret; | |
c3361f2f | 3143 | bool new_ext, ext; |
091d42e4 JR |
3144 | |
3145 | rtaddr_reg = dmar_readq(iommu->reg + DMAR_RTADDR_REG); | |
3146 | ext = !!(rtaddr_reg & DMA_RTADDR_RTT); | |
c3361f2f JR |
3147 | new_ext = !!ecap_ecs(iommu->ecap); |
3148 | ||
3149 | /* | |
3150 | * The RTT bit can only be changed when translation is disabled, | |
3151 | * but disabling translation means to open a window for data | |
3152 | * corruption. So bail out and don't copy anything if we would | |
3153 | * have to change the bit. | |
3154 | */ | |
3155 | if (new_ext != ext) | |
3156 | return -EINVAL; | |
091d42e4 JR |
3157 | |
3158 | old_rt_phys = rtaddr_reg & VTD_PAGE_MASK; | |
3159 | if (!old_rt_phys) | |
3160 | return -EINVAL; | |
3161 | ||
dfddb969 | 3162 | old_rt = memremap(old_rt_phys, PAGE_SIZE, MEMREMAP_WB); |
091d42e4 JR |
3163 | if (!old_rt) |
3164 | return -ENOMEM; | |
3165 | ||
3166 | /* This is too big for the stack - allocate it from slab */ | |
3167 | ctxt_table_entries = ext ? 512 : 256; | |
3168 | ret = -ENOMEM; | |
3169 | ctxt_tbls = kzalloc(ctxt_table_entries * sizeof(void *), GFP_KERNEL); | |
3170 | if (!ctxt_tbls) | |
3171 | goto out_unmap; | |
3172 | ||
3173 | for (bus = 0; bus < 256; bus++) { | |
3174 | ret = copy_context_table(iommu, &old_rt[bus], | |
3175 | ctxt_tbls, bus, ext); | |
3176 | if (ret) { | |
3177 | pr_err("%s: Failed to copy context table for bus %d\n", | |
3178 | iommu->name, bus); | |
3179 | continue; | |
3180 | } | |
3181 | } | |
3182 | ||
3183 | spin_lock_irqsave(&iommu->lock, flags); | |
3184 | ||
3185 | /* Context tables are copied, now write them to the root_entry table */ | |
3186 | for (bus = 0; bus < 256; bus++) { | |
3187 | int idx = ext ? bus * 2 : bus; | |
3188 | u64 val; | |
3189 | ||
3190 | if (ctxt_tbls[idx]) { | |
3191 | val = virt_to_phys(ctxt_tbls[idx]) | 1; | |
3192 | iommu->root_entry[bus].lo = val; | |
3193 | } | |
3194 | ||
3195 | if (!ext || !ctxt_tbls[idx + 1]) | |
3196 | continue; | |
3197 | ||
3198 | val = virt_to_phys(ctxt_tbls[idx + 1]) | 1; | |
3199 | iommu->root_entry[bus].hi = val; | |
3200 | } | |
3201 | ||
3202 | spin_unlock_irqrestore(&iommu->lock, flags); | |
3203 | ||
3204 | kfree(ctxt_tbls); | |
3205 | ||
3206 | __iommu_flush_cache(iommu, iommu->root_entry, PAGE_SIZE); | |
3207 | ||
3208 | ret = 0; | |
3209 | ||
3210 | out_unmap: | |
dfddb969 | 3211 | memunmap(old_rt); |
091d42e4 JR |
3212 | |
3213 | return ret; | |
3214 | } | |
3215 | ||
b779260b | 3216 | static int __init init_dmars(void) |
ba395927 KA |
3217 | { |
3218 | struct dmar_drhd_unit *drhd; | |
3219 | struct dmar_rmrr_unit *rmrr; | |
a87f4918 | 3220 | bool copied_tables = false; |
832bd858 | 3221 | struct device *dev; |
ba395927 | 3222 | struct intel_iommu *iommu; |
aa473240 | 3223 | int i, ret, cpu; |
2c2e2c38 | 3224 | |
ba395927 KA |
3225 | /* |
3226 | * for each drhd | |
3227 | * allocate root | |
3228 | * initialize and program root entry to not present | |
3229 | * endfor | |
3230 | */ | |
3231 | for_each_drhd_unit(drhd) { | |
5e0d2a6f | 3232 | /* |
3233 | * lock not needed as this is only incremented in the single | |
3234 | * threaded kernel __init code path all other access are read | |
3235 | * only | |
3236 | */ | |
78d8e704 | 3237 | if (g_num_of_iommus < DMAR_UNITS_SUPPORTED) { |
1b198bb0 MT |
3238 | g_num_of_iommus++; |
3239 | continue; | |
3240 | } | |
9f10e5bf | 3241 | pr_err_once("Exceeded %d IOMMUs\n", DMAR_UNITS_SUPPORTED); |
5e0d2a6f | 3242 | } |
3243 | ||
ffebeb46 JL |
3244 | /* Preallocate enough resources for IOMMU hot-addition */ |
3245 | if (g_num_of_iommus < DMAR_UNITS_SUPPORTED) | |
3246 | g_num_of_iommus = DMAR_UNITS_SUPPORTED; | |
3247 | ||
d9630fe9 WH |
3248 | g_iommus = kcalloc(g_num_of_iommus, sizeof(struct intel_iommu *), |
3249 | GFP_KERNEL); | |
3250 | if (!g_iommus) { | |
9f10e5bf | 3251 | pr_err("Allocating global iommu array failed\n"); |
d9630fe9 WH |
3252 | ret = -ENOMEM; |
3253 | goto error; | |
3254 | } | |
3255 | ||
aa473240 OP |
3256 | for_each_possible_cpu(cpu) { |
3257 | struct deferred_flush_data *dfd = per_cpu_ptr(&deferred_flush, | |
3258 | cpu); | |
3259 | ||
3260 | dfd->tables = kzalloc(g_num_of_iommus * | |
3261 | sizeof(struct deferred_flush_table), | |
3262 | GFP_KERNEL); | |
3263 | if (!dfd->tables) { | |
3264 | ret = -ENOMEM; | |
3265 | goto free_g_iommus; | |
3266 | } | |
3267 | ||
3268 | spin_lock_init(&dfd->lock); | |
3269 | setup_timer(&dfd->timer, flush_unmaps_timeout, cpu); | |
5e0d2a6f | 3270 | } |
3271 | ||
7c919779 | 3272 | for_each_active_iommu(iommu, drhd) { |
d9630fe9 | 3273 | g_iommus[iommu->seq_id] = iommu; |
ba395927 | 3274 | |
b63d80d1 JR |
3275 | intel_iommu_init_qi(iommu); |
3276 | ||
e61d98d8 SS |
3277 | ret = iommu_init_domains(iommu); |
3278 | if (ret) | |
989d51fc | 3279 | goto free_iommu; |
e61d98d8 | 3280 | |
4158c2ec JR |
3281 | init_translation_status(iommu); |
3282 | ||
091d42e4 JR |
3283 | if (translation_pre_enabled(iommu) && !is_kdump_kernel()) { |
3284 | iommu_disable_translation(iommu); | |
3285 | clear_translation_pre_enabled(iommu); | |
3286 | pr_warn("Translation was enabled for %s but we are not in kdump mode\n", | |
3287 | iommu->name); | |
3288 | } | |
4158c2ec | 3289 | |
ba395927 KA |
3290 | /* |
3291 | * TBD: | |
3292 | * we could share the same root & context tables | |
25985edc | 3293 | * among all IOMMU's. Need to Split it later. |
ba395927 KA |
3294 | */ |
3295 | ret = iommu_alloc_root_entry(iommu); | |
ffebeb46 | 3296 | if (ret) |
989d51fc | 3297 | goto free_iommu; |
5f0a7f76 | 3298 | |
091d42e4 JR |
3299 | if (translation_pre_enabled(iommu)) { |
3300 | pr_info("Translation already enabled - trying to copy translation structures\n"); | |
3301 | ||
3302 | ret = copy_translation_tables(iommu); | |
3303 | if (ret) { | |
3304 | /* | |
3305 | * We found the IOMMU with translation | |
3306 | * enabled - but failed to copy over the | |
3307 | * old root-entry table. Try to proceed | |
3308 | * by disabling translation now and | |
3309 | * allocating a clean root-entry table. | |
3310 | * This might cause DMAR faults, but | |
3311 | * probably the dump will still succeed. | |
3312 | */ | |
3313 | pr_err("Failed to copy translation tables from previous kernel for %s\n", | |
3314 | iommu->name); | |
3315 | iommu_disable_translation(iommu); | |
3316 | clear_translation_pre_enabled(iommu); | |
3317 | } else { | |
3318 | pr_info("Copied translation tables from previous kernel for %s\n", | |
3319 | iommu->name); | |
a87f4918 | 3320 | copied_tables = true; |
091d42e4 JR |
3321 | } |
3322 | } | |
3323 | ||
4ed0d3e6 | 3324 | if (!ecap_pass_through(iommu->ecap)) |
19943b0e | 3325 | hw_pass_through = 0; |
8a94ade4 DW |
3326 | #ifdef CONFIG_INTEL_IOMMU_SVM |
3327 | if (pasid_enabled(iommu)) | |
3328 | intel_svm_alloc_pasid_tables(iommu); | |
3329 | #endif | |
ba395927 KA |
3330 | } |
3331 | ||
a4c34ff1 JR |
3332 | /* |
3333 | * Now that qi is enabled on all iommus, set the root entry and flush | |
3334 | * caches. This is required on some Intel X58 chipsets, otherwise the | |
3335 | * flush_context function will loop forever and the boot hangs. | |
3336 | */ | |
3337 | for_each_active_iommu(iommu, drhd) { | |
3338 | iommu_flush_write_buffer(iommu); | |
3339 | iommu_set_root_entry(iommu); | |
3340 | iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); | |
3341 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); | |
3342 | } | |
3343 | ||
19943b0e | 3344 | if (iommu_pass_through) |
e0fc7e0b DW |
3345 | iommu_identity_mapping |= IDENTMAP_ALL; |
3346 | ||
d3f13810 | 3347 | #ifdef CONFIG_INTEL_IOMMU_BROKEN_GFX_WA |
e0fc7e0b | 3348 | iommu_identity_mapping |= IDENTMAP_GFX; |
19943b0e | 3349 | #endif |
e0fc7e0b | 3350 | |
24427cd7 AR |
3351 | check_tylersburg_isoch(); |
3352 | ||
86080ccc JR |
3353 | if (iommu_identity_mapping) { |
3354 | ret = si_domain_init(hw_pass_through); | |
3355 | if (ret) | |
3356 | goto free_iommu; | |
3357 | } | |
3358 | ||
e0fc7e0b | 3359 | |
a87f4918 JR |
3360 | /* |
3361 | * If we copied translations from a previous kernel in the kdump | |
3362 | * case, we can not assign the devices to domains now, as that | |
3363 | * would eliminate the old mappings. So skip this part and defer | |
3364 | * the assignment to device driver initialization time. | |
3365 | */ | |
3366 | if (copied_tables) | |
3367 | goto domains_done; | |
3368 | ||
ba395927 | 3369 | /* |
19943b0e DW |
3370 | * If pass through is not set or not enabled, setup context entries for |
3371 | * identity mappings for rmrr, gfx, and isa and may fall back to static | |
3372 | * identity mapping if iommu_identity_mapping is set. | |
ba395927 | 3373 | */ |
19943b0e DW |
3374 | if (iommu_identity_mapping) { |
3375 | ret = iommu_prepare_static_identity_mapping(hw_pass_through); | |
4ed0d3e6 | 3376 | if (ret) { |
9f10e5bf | 3377 | pr_crit("Failed to setup IOMMU pass-through\n"); |
989d51fc | 3378 | goto free_iommu; |
ba395927 KA |
3379 | } |
3380 | } | |
ba395927 | 3381 | /* |
19943b0e DW |
3382 | * For each rmrr |
3383 | * for each dev attached to rmrr | |
3384 | * do | |
3385 | * locate drhd for dev, alloc domain for dev | |
3386 | * allocate free domain | |
3387 | * allocate page table entries for rmrr | |
3388 | * if context not allocated for bus | |
3389 | * allocate and init context | |
3390 | * set present in root table for this bus | |
3391 | * init context with domain, translation etc | |
3392 | * endfor | |
3393 | * endfor | |
ba395927 | 3394 | */ |
9f10e5bf | 3395 | pr_info("Setting RMRR:\n"); |
19943b0e | 3396 | for_each_rmrr_units(rmrr) { |
b683b230 JL |
3397 | /* some BIOS lists non-exist devices in DMAR table. */ |
3398 | for_each_active_dev_scope(rmrr->devices, rmrr->devices_cnt, | |
832bd858 | 3399 | i, dev) { |
0b9d9753 | 3400 | ret = iommu_prepare_rmrr_dev(rmrr, dev); |
19943b0e | 3401 | if (ret) |
9f10e5bf | 3402 | pr_err("Mapping reserved region failed\n"); |
ba395927 | 3403 | } |
4ed0d3e6 | 3404 | } |
49a0429e | 3405 | |
19943b0e DW |
3406 | iommu_prepare_isa(); |
3407 | ||
a87f4918 JR |
3408 | domains_done: |
3409 | ||
ba395927 KA |
3410 | /* |
3411 | * for each drhd | |
3412 | * enable fault log | |
3413 | * global invalidate context cache | |
3414 | * global invalidate iotlb | |
3415 | * enable translation | |
3416 | */ | |
7c919779 | 3417 | for_each_iommu(iommu, drhd) { |
51a63e67 JC |
3418 | if (drhd->ignored) { |
3419 | /* | |
3420 | * we always have to disable PMRs or DMA may fail on | |
3421 | * this device | |
3422 | */ | |
3423 | if (force_on) | |
7c919779 | 3424 | iommu_disable_protect_mem_regions(iommu); |
ba395927 | 3425 | continue; |
51a63e67 | 3426 | } |
ba395927 KA |
3427 | |
3428 | iommu_flush_write_buffer(iommu); | |
3429 | ||
a222a7f0 DW |
3430 | #ifdef CONFIG_INTEL_IOMMU_SVM |
3431 | if (pasid_enabled(iommu) && ecap_prs(iommu->ecap)) { | |
3432 | ret = intel_svm_enable_prq(iommu); | |
3433 | if (ret) | |
3434 | goto free_iommu; | |
3435 | } | |
3436 | #endif | |
3460a6d9 KA |
3437 | ret = dmar_set_interrupt(iommu); |
3438 | if (ret) | |
989d51fc | 3439 | goto free_iommu; |
3460a6d9 | 3440 | |
8939ddf6 JR |
3441 | if (!translation_pre_enabled(iommu)) |
3442 | iommu_enable_translation(iommu); | |
3443 | ||
b94996c9 | 3444 | iommu_disable_protect_mem_regions(iommu); |
ba395927 KA |
3445 | } |
3446 | ||
3447 | return 0; | |
989d51fc JL |
3448 | |
3449 | free_iommu: | |
ffebeb46 JL |
3450 | for_each_active_iommu(iommu, drhd) { |
3451 | disable_dmar_iommu(iommu); | |
a868e6b7 | 3452 | free_dmar_iommu(iommu); |
ffebeb46 | 3453 | } |
989d51fc | 3454 | free_g_iommus: |
aa473240 OP |
3455 | for_each_possible_cpu(cpu) |
3456 | kfree(per_cpu_ptr(&deferred_flush, cpu)->tables); | |
d9630fe9 | 3457 | kfree(g_iommus); |
989d51fc | 3458 | error: |
ba395927 KA |
3459 | return ret; |
3460 | } | |
3461 | ||
5a5e02a6 | 3462 | /* This takes a number of _MM_ pages, not VTD pages */ |
2aac6304 | 3463 | static unsigned long intel_alloc_iova(struct device *dev, |
875764de DW |
3464 | struct dmar_domain *domain, |
3465 | unsigned long nrpages, uint64_t dma_mask) | |
ba395927 | 3466 | { |
22e2f9fa | 3467 | unsigned long iova_pfn = 0; |
ba395927 | 3468 | |
875764de DW |
3469 | /* Restrict dma_mask to the width that the iommu can handle */ |
3470 | dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask); | |
8f6429c7 RM |
3471 | /* Ensure we reserve the whole size-aligned region */ |
3472 | nrpages = __roundup_pow_of_two(nrpages); | |
875764de DW |
3473 | |
3474 | if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) { | |
ba395927 KA |
3475 | /* |
3476 | * First try to allocate an io virtual address in | |
284901a9 | 3477 | * DMA_BIT_MASK(32) and if that fails then try allocating |
3609801e | 3478 | * from higher range |
ba395927 | 3479 | */ |
22e2f9fa OP |
3480 | iova_pfn = alloc_iova_fast(&domain->iovad, nrpages, |
3481 | IOVA_PFN(DMA_BIT_MASK(32))); | |
3482 | if (iova_pfn) | |
3483 | return iova_pfn; | |
875764de | 3484 | } |
22e2f9fa OP |
3485 | iova_pfn = alloc_iova_fast(&domain->iovad, nrpages, IOVA_PFN(dma_mask)); |
3486 | if (unlikely(!iova_pfn)) { | |
9f10e5bf | 3487 | pr_err("Allocating %ld-page iova for %s failed", |
207e3592 | 3488 | nrpages, dev_name(dev)); |
2aac6304 | 3489 | return 0; |
f76aec76 KA |
3490 | } |
3491 | ||
22e2f9fa | 3492 | return iova_pfn; |
f76aec76 KA |
3493 | } |
3494 | ||
d4b709f4 | 3495 | static struct dmar_domain *__get_valid_domain_for_dev(struct device *dev) |
f76aec76 | 3496 | { |
1c5ebba9 | 3497 | struct dmar_domain *domain, *tmp; |
b1ce5b79 | 3498 | struct dmar_rmrr_unit *rmrr; |
b1ce5b79 JR |
3499 | struct device *i_dev; |
3500 | int i, ret; | |
f76aec76 | 3501 | |
1c5ebba9 JR |
3502 | domain = find_domain(dev); |
3503 | if (domain) | |
3504 | goto out; | |
3505 | ||
3506 | domain = find_or_alloc_domain(dev, DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
3507 | if (!domain) | |
3508 | goto out; | |
ba395927 | 3509 | |
b1ce5b79 JR |
3510 | /* We have a new domain - setup possible RMRRs for the device */ |
3511 | rcu_read_lock(); | |
3512 | for_each_rmrr_units(rmrr) { | |
3513 | for_each_active_dev_scope(rmrr->devices, rmrr->devices_cnt, | |
3514 | i, i_dev) { | |
3515 | if (i_dev != dev) | |
3516 | continue; | |
3517 | ||
3518 | ret = domain_prepare_identity_map(dev, domain, | |
3519 | rmrr->base_address, | |
3520 | rmrr->end_address); | |
3521 | if (ret) | |
3522 | dev_err(dev, "Mapping reserved region failed\n"); | |
3523 | } | |
3524 | } | |
3525 | rcu_read_unlock(); | |
3526 | ||
1c5ebba9 JR |
3527 | tmp = set_domain_for_dev(dev, domain); |
3528 | if (!tmp || domain != tmp) { | |
3529 | domain_exit(domain); | |
3530 | domain = tmp; | |
3531 | } | |
3532 | ||
3533 | out: | |
3534 | ||
3535 | if (!domain) | |
3536 | pr_err("Allocating domain for %s failed\n", dev_name(dev)); | |
3537 | ||
3538 | ||
f76aec76 KA |
3539 | return domain; |
3540 | } | |
3541 | ||
d4b709f4 | 3542 | static inline struct dmar_domain *get_valid_domain_for_dev(struct device *dev) |
147202aa DW |
3543 | { |
3544 | struct device_domain_info *info; | |
3545 | ||
3546 | /* No lock here, assumes no domain exit in normal case */ | |
d4b709f4 | 3547 | info = dev->archdata.iommu; |
147202aa DW |
3548 | if (likely(info)) |
3549 | return info->domain; | |
3550 | ||
3551 | return __get_valid_domain_for_dev(dev); | |
3552 | } | |
3553 | ||
ecb509ec | 3554 | /* Check if the dev needs to go through non-identity map and unmap process.*/ |
73676832 | 3555 | static int iommu_no_mapping(struct device *dev) |
2c2e2c38 FY |
3556 | { |
3557 | int found; | |
3558 | ||
3d89194a | 3559 | if (iommu_dummy(dev)) |
1e4c64c4 DW |
3560 | return 1; |
3561 | ||
2c2e2c38 | 3562 | if (!iommu_identity_mapping) |
1e4c64c4 | 3563 | return 0; |
2c2e2c38 | 3564 | |
9b226624 | 3565 | found = identity_mapping(dev); |
2c2e2c38 | 3566 | if (found) { |
ecb509ec | 3567 | if (iommu_should_identity_map(dev, 0)) |
2c2e2c38 FY |
3568 | return 1; |
3569 | else { | |
3570 | /* | |
3571 | * 32 bit DMA is removed from si_domain and fall back | |
3572 | * to non-identity mapping. | |
3573 | */ | |
e6de0f8d | 3574 | dmar_remove_one_dev_info(si_domain, dev); |
9f10e5bf JR |
3575 | pr_info("32bit %s uses non-identity mapping\n", |
3576 | dev_name(dev)); | |
2c2e2c38 FY |
3577 | return 0; |
3578 | } | |
3579 | } else { | |
3580 | /* | |
3581 | * In case of a detached 64 bit DMA device from vm, the device | |
3582 | * is put into si_domain for identity mapping. | |
3583 | */ | |
ecb509ec | 3584 | if (iommu_should_identity_map(dev, 0)) { |
2c2e2c38 | 3585 | int ret; |
28ccce0d | 3586 | ret = domain_add_dev_info(si_domain, dev); |
2c2e2c38 | 3587 | if (!ret) { |
9f10e5bf JR |
3588 | pr_info("64bit %s uses identity mapping\n", |
3589 | dev_name(dev)); | |
2c2e2c38 FY |
3590 | return 1; |
3591 | } | |
3592 | } | |
3593 | } | |
3594 | ||
1e4c64c4 | 3595 | return 0; |
2c2e2c38 FY |
3596 | } |
3597 | ||
5040a918 | 3598 | static dma_addr_t __intel_map_single(struct device *dev, phys_addr_t paddr, |
bb9e6d65 | 3599 | size_t size, int dir, u64 dma_mask) |
f76aec76 | 3600 | { |
f76aec76 | 3601 | struct dmar_domain *domain; |
5b6985ce | 3602 | phys_addr_t start_paddr; |
2aac6304 | 3603 | unsigned long iova_pfn; |
f76aec76 | 3604 | int prot = 0; |
6865f0d1 | 3605 | int ret; |
8c11e798 | 3606 | struct intel_iommu *iommu; |
33041ec0 | 3607 | unsigned long paddr_pfn = paddr >> PAGE_SHIFT; |
f76aec76 KA |
3608 | |
3609 | BUG_ON(dir == DMA_NONE); | |
2c2e2c38 | 3610 | |
5040a918 | 3611 | if (iommu_no_mapping(dev)) |
6865f0d1 | 3612 | return paddr; |
f76aec76 | 3613 | |
5040a918 | 3614 | domain = get_valid_domain_for_dev(dev); |
f76aec76 KA |
3615 | if (!domain) |
3616 | return 0; | |
3617 | ||
8c11e798 | 3618 | iommu = domain_get_iommu(domain); |
88cb6a74 | 3619 | size = aligned_nrpages(paddr, size); |
f76aec76 | 3620 | |
2aac6304 OP |
3621 | iova_pfn = intel_alloc_iova(dev, domain, dma_to_mm_pfn(size), dma_mask); |
3622 | if (!iova_pfn) | |
f76aec76 KA |
3623 | goto error; |
3624 | ||
ba395927 KA |
3625 | /* |
3626 | * Check if DMAR supports zero-length reads on write only | |
3627 | * mappings.. | |
3628 | */ | |
3629 | if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL || \ | |
8c11e798 | 3630 | !cap_zlr(iommu->cap)) |
ba395927 KA |
3631 | prot |= DMA_PTE_READ; |
3632 | if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) | |
3633 | prot |= DMA_PTE_WRITE; | |
3634 | /* | |
6865f0d1 | 3635 | * paddr - (paddr + size) might be partial page, we should map the whole |
ba395927 | 3636 | * page. Note: if two part of one page are separately mapped, we |
6865f0d1 | 3637 | * might have two guest_addr mapping to the same host paddr, but this |
ba395927 KA |
3638 | * is not a big problem |
3639 | */ | |
2aac6304 | 3640 | ret = domain_pfn_mapping(domain, mm_to_dma_pfn(iova_pfn), |
33041ec0 | 3641 | mm_to_dma_pfn(paddr_pfn), size, prot); |
ba395927 KA |
3642 | if (ret) |
3643 | goto error; | |
3644 | ||
1f0ef2aa DW |
3645 | /* it's a non-present to present mapping. Only flush if caching mode */ |
3646 | if (cap_caching_mode(iommu->cap)) | |
a1ddcbe9 | 3647 | iommu_flush_iotlb_psi(iommu, domain, |
2aac6304 | 3648 | mm_to_dma_pfn(iova_pfn), |
a1ddcbe9 | 3649 | size, 0, 1); |
1f0ef2aa | 3650 | else |
8c11e798 | 3651 | iommu_flush_write_buffer(iommu); |
f76aec76 | 3652 | |
2aac6304 | 3653 | start_paddr = (phys_addr_t)iova_pfn << PAGE_SHIFT; |
03d6a246 DW |
3654 | start_paddr += paddr & ~PAGE_MASK; |
3655 | return start_paddr; | |
ba395927 | 3656 | |
ba395927 | 3657 | error: |
2aac6304 | 3658 | if (iova_pfn) |
22e2f9fa | 3659 | free_iova_fast(&domain->iovad, iova_pfn, dma_to_mm_pfn(size)); |
9f10e5bf | 3660 | pr_err("Device %s request: %zx@%llx dir %d --- failed\n", |
5040a918 | 3661 | dev_name(dev), size, (unsigned long long)paddr, dir); |
ba395927 KA |
3662 | return 0; |
3663 | } | |
3664 | ||
ffbbef5c FT |
3665 | static dma_addr_t intel_map_page(struct device *dev, struct page *page, |
3666 | unsigned long offset, size_t size, | |
3667 | enum dma_data_direction dir, | |
00085f1e | 3668 | unsigned long attrs) |
bb9e6d65 | 3669 | { |
ffbbef5c | 3670 | return __intel_map_single(dev, page_to_phys(page) + offset, size, |
46333e37 | 3671 | dir, *dev->dma_mask); |
bb9e6d65 FT |
3672 | } |
3673 | ||
aa473240 | 3674 | static void flush_unmaps(struct deferred_flush_data *flush_data) |
5e0d2a6f | 3675 | { |
80b20dd8 | 3676 | int i, j; |
5e0d2a6f | 3677 | |
aa473240 | 3678 | flush_data->timer_on = 0; |
5e0d2a6f | 3679 | |
3680 | /* just flush them all */ | |
3681 | for (i = 0; i < g_num_of_iommus; i++) { | |
a2bb8459 | 3682 | struct intel_iommu *iommu = g_iommus[i]; |
aa473240 OP |
3683 | struct deferred_flush_table *flush_table = |
3684 | &flush_data->tables[i]; | |
a2bb8459 WH |
3685 | if (!iommu) |
3686 | continue; | |
c42d9f32 | 3687 | |
aa473240 | 3688 | if (!flush_table->next) |
9dd2fe89 YZ |
3689 | continue; |
3690 | ||
78d5f0f5 NA |
3691 | /* In caching mode, global flushes turn emulation expensive */ |
3692 | if (!cap_caching_mode(iommu->cap)) | |
3693 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, | |
93a23a72 | 3694 | DMA_TLB_GLOBAL_FLUSH); |
aa473240 | 3695 | for (j = 0; j < flush_table->next; j++) { |
93a23a72 | 3696 | unsigned long mask; |
314f1dc1 | 3697 | struct deferred_flush_entry *entry = |
aa473240 | 3698 | &flush_table->entries[j]; |
2aac6304 | 3699 | unsigned long iova_pfn = entry->iova_pfn; |
769530e4 | 3700 | unsigned long nrpages = entry->nrpages; |
314f1dc1 OP |
3701 | struct dmar_domain *domain = entry->domain; |
3702 | struct page *freelist = entry->freelist; | |
78d5f0f5 NA |
3703 | |
3704 | /* On real hardware multiple invalidations are expensive */ | |
3705 | if (cap_caching_mode(iommu->cap)) | |
a1ddcbe9 | 3706 | iommu_flush_iotlb_psi(iommu, domain, |
2aac6304 | 3707 | mm_to_dma_pfn(iova_pfn), |
769530e4 | 3708 | nrpages, !freelist, 0); |
78d5f0f5 | 3709 | else { |
769530e4 | 3710 | mask = ilog2(nrpages); |
314f1dc1 | 3711 | iommu_flush_dev_iotlb(domain, |
2aac6304 | 3712 | (uint64_t)iova_pfn << PAGE_SHIFT, mask); |
78d5f0f5 | 3713 | } |
22e2f9fa | 3714 | free_iova_fast(&domain->iovad, iova_pfn, nrpages); |
314f1dc1 OP |
3715 | if (freelist) |
3716 | dma_free_pagelist(freelist); | |
80b20dd8 | 3717 | } |
aa473240 | 3718 | flush_table->next = 0; |
5e0d2a6f | 3719 | } |
3720 | ||
aa473240 | 3721 | flush_data->size = 0; |
5e0d2a6f | 3722 | } |
3723 | ||
aa473240 | 3724 | static void flush_unmaps_timeout(unsigned long cpuid) |
5e0d2a6f | 3725 | { |
aa473240 | 3726 | struct deferred_flush_data *flush_data = per_cpu_ptr(&deferred_flush, cpuid); |
80b20dd8 | 3727 | unsigned long flags; |
3728 | ||
aa473240 OP |
3729 | spin_lock_irqsave(&flush_data->lock, flags); |
3730 | flush_unmaps(flush_data); | |
3731 | spin_unlock_irqrestore(&flush_data->lock, flags); | |
5e0d2a6f | 3732 | } |
3733 | ||
2aac6304 | 3734 | static void add_unmap(struct dmar_domain *dom, unsigned long iova_pfn, |
769530e4 | 3735 | unsigned long nrpages, struct page *freelist) |
5e0d2a6f | 3736 | { |
3737 | unsigned long flags; | |
314f1dc1 | 3738 | int entry_id, iommu_id; |
8c11e798 | 3739 | struct intel_iommu *iommu; |
314f1dc1 | 3740 | struct deferred_flush_entry *entry; |
aa473240 OP |
3741 | struct deferred_flush_data *flush_data; |
3742 | unsigned int cpuid; | |
5e0d2a6f | 3743 | |
aa473240 OP |
3744 | cpuid = get_cpu(); |
3745 | flush_data = per_cpu_ptr(&deferred_flush, cpuid); | |
3746 | ||
3747 | /* Flush all CPUs' entries to avoid deferring too much. If | |
3748 | * this becomes a bottleneck, can just flush us, and rely on | |
3749 | * flush timer for the rest. | |
3750 | */ | |
3751 | if (flush_data->size == HIGH_WATER_MARK) { | |
3752 | int cpu; | |
3753 | ||
3754 | for_each_online_cpu(cpu) | |
3755 | flush_unmaps_timeout(cpu); | |
3756 | } | |
3757 | ||
3758 | spin_lock_irqsave(&flush_data->lock, flags); | |
80b20dd8 | 3759 | |
8c11e798 WH |
3760 | iommu = domain_get_iommu(dom); |
3761 | iommu_id = iommu->seq_id; | |
c42d9f32 | 3762 | |
aa473240 OP |
3763 | entry_id = flush_data->tables[iommu_id].next; |
3764 | ++(flush_data->tables[iommu_id].next); | |
5e0d2a6f | 3765 | |
aa473240 | 3766 | entry = &flush_data->tables[iommu_id].entries[entry_id]; |
314f1dc1 | 3767 | entry->domain = dom; |
2aac6304 | 3768 | entry->iova_pfn = iova_pfn; |
769530e4 | 3769 | entry->nrpages = nrpages; |
314f1dc1 | 3770 | entry->freelist = freelist; |
5e0d2a6f | 3771 | |
aa473240 OP |
3772 | if (!flush_data->timer_on) { |
3773 | mod_timer(&flush_data->timer, jiffies + msecs_to_jiffies(10)); | |
3774 | flush_data->timer_on = 1; | |
5e0d2a6f | 3775 | } |
aa473240 OP |
3776 | flush_data->size++; |
3777 | spin_unlock_irqrestore(&flush_data->lock, flags); | |
3778 | ||
3779 | put_cpu(); | |
5e0d2a6f | 3780 | } |
3781 | ||
769530e4 | 3782 | static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size) |
ba395927 | 3783 | { |
f76aec76 | 3784 | struct dmar_domain *domain; |
d794dc9b | 3785 | unsigned long start_pfn, last_pfn; |
769530e4 | 3786 | unsigned long nrpages; |
2aac6304 | 3787 | unsigned long iova_pfn; |
8c11e798 | 3788 | struct intel_iommu *iommu; |
ea8ea460 | 3789 | struct page *freelist; |
ba395927 | 3790 | |
73676832 | 3791 | if (iommu_no_mapping(dev)) |
f76aec76 | 3792 | return; |
2c2e2c38 | 3793 | |
1525a29a | 3794 | domain = find_domain(dev); |
ba395927 KA |
3795 | BUG_ON(!domain); |
3796 | ||
8c11e798 WH |
3797 | iommu = domain_get_iommu(domain); |
3798 | ||
2aac6304 | 3799 | iova_pfn = IOVA_PFN(dev_addr); |
ba395927 | 3800 | |
769530e4 | 3801 | nrpages = aligned_nrpages(dev_addr, size); |
2aac6304 | 3802 | start_pfn = mm_to_dma_pfn(iova_pfn); |
769530e4 | 3803 | last_pfn = start_pfn + nrpages - 1; |
ba395927 | 3804 | |
d794dc9b | 3805 | pr_debug("Device %s unmapping: pfn %lx-%lx\n", |
207e3592 | 3806 | dev_name(dev), start_pfn, last_pfn); |
ba395927 | 3807 | |
ea8ea460 | 3808 | freelist = domain_unmap(domain, start_pfn, last_pfn); |
d794dc9b | 3809 | |
5e0d2a6f | 3810 | if (intel_iommu_strict) { |
a1ddcbe9 | 3811 | iommu_flush_iotlb_psi(iommu, domain, start_pfn, |
769530e4 | 3812 | nrpages, !freelist, 0); |
5e0d2a6f | 3813 | /* free iova */ |
22e2f9fa | 3814 | free_iova_fast(&domain->iovad, iova_pfn, dma_to_mm_pfn(nrpages)); |
ea8ea460 | 3815 | dma_free_pagelist(freelist); |
5e0d2a6f | 3816 | } else { |
2aac6304 | 3817 | add_unmap(domain, iova_pfn, nrpages, freelist); |
5e0d2a6f | 3818 | /* |
3819 | * queue up the release of the unmap to save the 1/6th of the | |
3820 | * cpu used up by the iotlb flush operation... | |
3821 | */ | |
5e0d2a6f | 3822 | } |
ba395927 KA |
3823 | } |
3824 | ||
d41a4adb JL |
3825 | static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr, |
3826 | size_t size, enum dma_data_direction dir, | |
00085f1e | 3827 | unsigned long attrs) |
d41a4adb | 3828 | { |
769530e4 | 3829 | intel_unmap(dev, dev_addr, size); |
d41a4adb JL |
3830 | } |
3831 | ||
5040a918 | 3832 | static void *intel_alloc_coherent(struct device *dev, size_t size, |
baa676fc | 3833 | dma_addr_t *dma_handle, gfp_t flags, |
00085f1e | 3834 | unsigned long attrs) |
ba395927 | 3835 | { |
36746436 | 3836 | struct page *page = NULL; |
ba395927 KA |
3837 | int order; |
3838 | ||
5b6985ce | 3839 | size = PAGE_ALIGN(size); |
ba395927 | 3840 | order = get_order(size); |
e8bb910d | 3841 | |
5040a918 | 3842 | if (!iommu_no_mapping(dev)) |
e8bb910d | 3843 | flags &= ~(GFP_DMA | GFP_DMA32); |
5040a918 DW |
3844 | else if (dev->coherent_dma_mask < dma_get_required_mask(dev)) { |
3845 | if (dev->coherent_dma_mask < DMA_BIT_MASK(32)) | |
e8bb910d AW |
3846 | flags |= GFP_DMA; |
3847 | else | |
3848 | flags |= GFP_DMA32; | |
3849 | } | |
ba395927 | 3850 | |
d0164adc | 3851 | if (gfpflags_allow_blocking(flags)) { |
36746436 AM |
3852 | unsigned int count = size >> PAGE_SHIFT; |
3853 | ||
3854 | page = dma_alloc_from_contiguous(dev, count, order); | |
3855 | if (page && iommu_no_mapping(dev) && | |
3856 | page_to_phys(page) + size > dev->coherent_dma_mask) { | |
3857 | dma_release_from_contiguous(dev, page, count); | |
3858 | page = NULL; | |
3859 | } | |
3860 | } | |
3861 | ||
3862 | if (!page) | |
3863 | page = alloc_pages(flags, order); | |
3864 | if (!page) | |
ba395927 | 3865 | return NULL; |
36746436 | 3866 | memset(page_address(page), 0, size); |
ba395927 | 3867 | |
36746436 | 3868 | *dma_handle = __intel_map_single(dev, page_to_phys(page), size, |
bb9e6d65 | 3869 | DMA_BIDIRECTIONAL, |
5040a918 | 3870 | dev->coherent_dma_mask); |
ba395927 | 3871 | if (*dma_handle) |
36746436 AM |
3872 | return page_address(page); |
3873 | if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) | |
3874 | __free_pages(page, order); | |
3875 | ||
ba395927 KA |
3876 | return NULL; |
3877 | } | |
3878 | ||
5040a918 | 3879 | static void intel_free_coherent(struct device *dev, size_t size, void *vaddr, |
00085f1e | 3880 | dma_addr_t dma_handle, unsigned long attrs) |
ba395927 KA |
3881 | { |
3882 | int order; | |
36746436 | 3883 | struct page *page = virt_to_page(vaddr); |
ba395927 | 3884 | |
5b6985ce | 3885 | size = PAGE_ALIGN(size); |
ba395927 KA |
3886 | order = get_order(size); |
3887 | ||
769530e4 | 3888 | intel_unmap(dev, dma_handle, size); |
36746436 AM |
3889 | if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) |
3890 | __free_pages(page, order); | |
ba395927 KA |
3891 | } |
3892 | ||
5040a918 | 3893 | static void intel_unmap_sg(struct device *dev, struct scatterlist *sglist, |
d7ab5c46 | 3894 | int nelems, enum dma_data_direction dir, |
00085f1e | 3895 | unsigned long attrs) |
ba395927 | 3896 | { |
769530e4 OP |
3897 | dma_addr_t startaddr = sg_dma_address(sglist) & PAGE_MASK; |
3898 | unsigned long nrpages = 0; | |
3899 | struct scatterlist *sg; | |
3900 | int i; | |
3901 | ||
3902 | for_each_sg(sglist, sg, nelems, i) { | |
3903 | nrpages += aligned_nrpages(sg_dma_address(sg), sg_dma_len(sg)); | |
3904 | } | |
3905 | ||
3906 | intel_unmap(dev, startaddr, nrpages << VTD_PAGE_SHIFT); | |
ba395927 KA |
3907 | } |
3908 | ||
ba395927 | 3909 | static int intel_nontranslate_map_sg(struct device *hddev, |
c03ab37c | 3910 | struct scatterlist *sglist, int nelems, int dir) |
ba395927 KA |
3911 | { |
3912 | int i; | |
c03ab37c | 3913 | struct scatterlist *sg; |
ba395927 | 3914 | |
c03ab37c | 3915 | for_each_sg(sglist, sg, nelems, i) { |
12d4d40e | 3916 | BUG_ON(!sg_page(sg)); |
e17f2b51 | 3917 | sg->dma_address = sg_phys(sg); |
c03ab37c | 3918 | sg->dma_length = sg->length; |
ba395927 KA |
3919 | } |
3920 | return nelems; | |
3921 | } | |
3922 | ||
5040a918 | 3923 | static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nelems, |
00085f1e | 3924 | enum dma_data_direction dir, unsigned long attrs) |
ba395927 | 3925 | { |
ba395927 | 3926 | int i; |
ba395927 | 3927 | struct dmar_domain *domain; |
f76aec76 KA |
3928 | size_t size = 0; |
3929 | int prot = 0; | |
2aac6304 | 3930 | unsigned long iova_pfn; |
f76aec76 | 3931 | int ret; |
c03ab37c | 3932 | struct scatterlist *sg; |
b536d24d | 3933 | unsigned long start_vpfn; |
8c11e798 | 3934 | struct intel_iommu *iommu; |
ba395927 KA |
3935 | |
3936 | BUG_ON(dir == DMA_NONE); | |
5040a918 DW |
3937 | if (iommu_no_mapping(dev)) |
3938 | return intel_nontranslate_map_sg(dev, sglist, nelems, dir); | |
ba395927 | 3939 | |
5040a918 | 3940 | domain = get_valid_domain_for_dev(dev); |
f76aec76 KA |
3941 | if (!domain) |
3942 | return 0; | |
3943 | ||
8c11e798 WH |
3944 | iommu = domain_get_iommu(domain); |
3945 | ||
b536d24d | 3946 | for_each_sg(sglist, sg, nelems, i) |
88cb6a74 | 3947 | size += aligned_nrpages(sg->offset, sg->length); |
f76aec76 | 3948 | |
2aac6304 | 3949 | iova_pfn = intel_alloc_iova(dev, domain, dma_to_mm_pfn(size), |
5040a918 | 3950 | *dev->dma_mask); |
2aac6304 | 3951 | if (!iova_pfn) { |
c03ab37c | 3952 | sglist->dma_length = 0; |
f76aec76 KA |
3953 | return 0; |
3954 | } | |
3955 | ||
3956 | /* | |
3957 | * Check if DMAR supports zero-length reads on write only | |
3958 | * mappings.. | |
3959 | */ | |
3960 | if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL || \ | |
8c11e798 | 3961 | !cap_zlr(iommu->cap)) |
f76aec76 KA |
3962 | prot |= DMA_PTE_READ; |
3963 | if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) | |
3964 | prot |= DMA_PTE_WRITE; | |
3965 | ||
2aac6304 | 3966 | start_vpfn = mm_to_dma_pfn(iova_pfn); |
e1605495 | 3967 | |
f532959b | 3968 | ret = domain_sg_mapping(domain, start_vpfn, sglist, size, prot); |
e1605495 | 3969 | if (unlikely(ret)) { |
e1605495 DW |
3970 | dma_pte_free_pagetable(domain, start_vpfn, |
3971 | start_vpfn + size - 1); | |
22e2f9fa | 3972 | free_iova_fast(&domain->iovad, iova_pfn, dma_to_mm_pfn(size)); |
e1605495 | 3973 | return 0; |
ba395927 KA |
3974 | } |
3975 | ||
1f0ef2aa DW |
3976 | /* it's a non-present to present mapping. Only flush if caching mode */ |
3977 | if (cap_caching_mode(iommu->cap)) | |
a1ddcbe9 | 3978 | iommu_flush_iotlb_psi(iommu, domain, start_vpfn, size, 0, 1); |
1f0ef2aa | 3979 | else |
8c11e798 | 3980 | iommu_flush_write_buffer(iommu); |
1f0ef2aa | 3981 | |
ba395927 KA |
3982 | return nelems; |
3983 | } | |
3984 | ||
dfb805e8 FT |
3985 | static int intel_mapping_error(struct device *dev, dma_addr_t dma_addr) |
3986 | { | |
3987 | return !dma_addr; | |
3988 | } | |
3989 | ||
160c1d8e | 3990 | struct dma_map_ops intel_dma_ops = { |
baa676fc AP |
3991 | .alloc = intel_alloc_coherent, |
3992 | .free = intel_free_coherent, | |
ba395927 KA |
3993 | .map_sg = intel_map_sg, |
3994 | .unmap_sg = intel_unmap_sg, | |
ffbbef5c FT |
3995 | .map_page = intel_map_page, |
3996 | .unmap_page = intel_unmap_page, | |
dfb805e8 | 3997 | .mapping_error = intel_mapping_error, |
ba395927 KA |
3998 | }; |
3999 | ||
4000 | static inline int iommu_domain_cache_init(void) | |
4001 | { | |
4002 | int ret = 0; | |
4003 | ||
4004 | iommu_domain_cache = kmem_cache_create("iommu_domain", | |
4005 | sizeof(struct dmar_domain), | |
4006 | 0, | |
4007 | SLAB_HWCACHE_ALIGN, | |
4008 | ||
4009 | NULL); | |
4010 | if (!iommu_domain_cache) { | |
9f10e5bf | 4011 | pr_err("Couldn't create iommu_domain cache\n"); |
ba395927 KA |
4012 | ret = -ENOMEM; |
4013 | } | |
4014 | ||
4015 | return ret; | |
4016 | } | |
4017 | ||
4018 | static inline int iommu_devinfo_cache_init(void) | |
4019 | { | |
4020 | int ret = 0; | |
4021 | ||
4022 | iommu_devinfo_cache = kmem_cache_create("iommu_devinfo", | |
4023 | sizeof(struct device_domain_info), | |
4024 | 0, | |
4025 | SLAB_HWCACHE_ALIGN, | |
ba395927 KA |
4026 | NULL); |
4027 | if (!iommu_devinfo_cache) { | |
9f10e5bf | 4028 | pr_err("Couldn't create devinfo cache\n"); |
ba395927 KA |
4029 | ret = -ENOMEM; |
4030 | } | |
4031 | ||
4032 | return ret; | |
4033 | } | |
4034 | ||
ba395927 KA |
4035 | static int __init iommu_init_mempool(void) |
4036 | { | |
4037 | int ret; | |
ae1ff3d6 | 4038 | ret = iova_cache_get(); |
ba395927 KA |
4039 | if (ret) |
4040 | return ret; | |
4041 | ||
4042 | ret = iommu_domain_cache_init(); | |
4043 | if (ret) | |
4044 | goto domain_error; | |
4045 | ||
4046 | ret = iommu_devinfo_cache_init(); | |
4047 | if (!ret) | |
4048 | return ret; | |
4049 | ||
4050 | kmem_cache_destroy(iommu_domain_cache); | |
4051 | domain_error: | |
ae1ff3d6 | 4052 | iova_cache_put(); |
ba395927 KA |
4053 | |
4054 | return -ENOMEM; | |
4055 | } | |
4056 | ||
4057 | static void __init iommu_exit_mempool(void) | |
4058 | { | |
4059 | kmem_cache_destroy(iommu_devinfo_cache); | |
4060 | kmem_cache_destroy(iommu_domain_cache); | |
ae1ff3d6 | 4061 | iova_cache_put(); |
ba395927 KA |
4062 | } |
4063 | ||
556ab45f DW |
4064 | static void quirk_ioat_snb_local_iommu(struct pci_dev *pdev) |
4065 | { | |
4066 | struct dmar_drhd_unit *drhd; | |
4067 | u32 vtbar; | |
4068 | int rc; | |
4069 | ||
4070 | /* We know that this device on this chipset has its own IOMMU. | |
4071 | * If we find it under a different IOMMU, then the BIOS is lying | |
4072 | * to us. Hope that the IOMMU for this device is actually | |
4073 | * disabled, and it needs no translation... | |
4074 | */ | |
4075 | rc = pci_bus_read_config_dword(pdev->bus, PCI_DEVFN(0, 0), 0xb0, &vtbar); | |
4076 | if (rc) { | |
4077 | /* "can't" happen */ | |
4078 | dev_info(&pdev->dev, "failed to run vt-d quirk\n"); | |
4079 | return; | |
4080 | } | |
4081 | vtbar &= 0xffff0000; | |
4082 | ||
4083 | /* we know that the this iommu should be at offset 0xa000 from vtbar */ | |
4084 | drhd = dmar_find_matched_drhd_unit(pdev); | |
4085 | if (WARN_TAINT_ONCE(!drhd || drhd->reg_base_addr - vtbar != 0xa000, | |
4086 | TAINT_FIRMWARE_WORKAROUND, | |
4087 | "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n")) | |
4088 | pdev->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; | |
4089 | } | |
4090 | DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu); | |
4091 | ||
ba395927 KA |
4092 | static void __init init_no_remapping_devices(void) |
4093 | { | |
4094 | struct dmar_drhd_unit *drhd; | |
832bd858 | 4095 | struct device *dev; |
b683b230 | 4096 | int i; |
ba395927 KA |
4097 | |
4098 | for_each_drhd_unit(drhd) { | |
4099 | if (!drhd->include_all) { | |
b683b230 JL |
4100 | for_each_active_dev_scope(drhd->devices, |
4101 | drhd->devices_cnt, i, dev) | |
4102 | break; | |
832bd858 | 4103 | /* ignore DMAR unit if no devices exist */ |
ba395927 KA |
4104 | if (i == drhd->devices_cnt) |
4105 | drhd->ignored = 1; | |
4106 | } | |
4107 | } | |
4108 | ||
7c919779 | 4109 | for_each_active_drhd_unit(drhd) { |
7c919779 | 4110 | if (drhd->include_all) |
ba395927 KA |
4111 | continue; |
4112 | ||
b683b230 JL |
4113 | for_each_active_dev_scope(drhd->devices, |
4114 | drhd->devices_cnt, i, dev) | |
832bd858 | 4115 | if (!dev_is_pci(dev) || !IS_GFX_DEVICE(to_pci_dev(dev))) |
ba395927 | 4116 | break; |
ba395927 KA |
4117 | if (i < drhd->devices_cnt) |
4118 | continue; | |
4119 | ||
c0771df8 DW |
4120 | /* This IOMMU has *only* gfx devices. Either bypass it or |
4121 | set the gfx_mapped flag, as appropriate */ | |
4122 | if (dmar_map_gfx) { | |
4123 | intel_iommu_gfx_mapped = 1; | |
4124 | } else { | |
4125 | drhd->ignored = 1; | |
b683b230 JL |
4126 | for_each_active_dev_scope(drhd->devices, |
4127 | drhd->devices_cnt, i, dev) | |
832bd858 | 4128 | dev->archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; |
ba395927 KA |
4129 | } |
4130 | } | |
4131 | } | |
4132 | ||
f59c7b69 FY |
4133 | #ifdef CONFIG_SUSPEND |
4134 | static int init_iommu_hw(void) | |
4135 | { | |
4136 | struct dmar_drhd_unit *drhd; | |
4137 | struct intel_iommu *iommu = NULL; | |
4138 | ||
4139 | for_each_active_iommu(iommu, drhd) | |
4140 | if (iommu->qi) | |
4141 | dmar_reenable_qi(iommu); | |
4142 | ||
b779260b JC |
4143 | for_each_iommu(iommu, drhd) { |
4144 | if (drhd->ignored) { | |
4145 | /* | |
4146 | * we always have to disable PMRs or DMA may fail on | |
4147 | * this device | |
4148 | */ | |
4149 | if (force_on) | |
4150 | iommu_disable_protect_mem_regions(iommu); | |
4151 | continue; | |
4152 | } | |
4153 | ||
f59c7b69 FY |
4154 | iommu_flush_write_buffer(iommu); |
4155 | ||
4156 | iommu_set_root_entry(iommu); | |
4157 | ||
4158 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
1f0ef2aa | 4159 | DMA_CCMD_GLOBAL_INVL); |
2a41ccee JL |
4160 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); |
4161 | iommu_enable_translation(iommu); | |
b94996c9 | 4162 | iommu_disable_protect_mem_regions(iommu); |
f59c7b69 FY |
4163 | } |
4164 | ||
4165 | return 0; | |
4166 | } | |
4167 | ||
4168 | static void iommu_flush_all(void) | |
4169 | { | |
4170 | struct dmar_drhd_unit *drhd; | |
4171 | struct intel_iommu *iommu; | |
4172 | ||
4173 | for_each_active_iommu(iommu, drhd) { | |
4174 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
1f0ef2aa | 4175 | DMA_CCMD_GLOBAL_INVL); |
f59c7b69 | 4176 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, |
1f0ef2aa | 4177 | DMA_TLB_GLOBAL_FLUSH); |
f59c7b69 FY |
4178 | } |
4179 | } | |
4180 | ||
134fac3f | 4181 | static int iommu_suspend(void) |
f59c7b69 FY |
4182 | { |
4183 | struct dmar_drhd_unit *drhd; | |
4184 | struct intel_iommu *iommu = NULL; | |
4185 | unsigned long flag; | |
4186 | ||
4187 | for_each_active_iommu(iommu, drhd) { | |
4188 | iommu->iommu_state = kzalloc(sizeof(u32) * MAX_SR_DMAR_REGS, | |
4189 | GFP_ATOMIC); | |
4190 | if (!iommu->iommu_state) | |
4191 | goto nomem; | |
4192 | } | |
4193 | ||
4194 | iommu_flush_all(); | |
4195 | ||
4196 | for_each_active_iommu(iommu, drhd) { | |
4197 | iommu_disable_translation(iommu); | |
4198 | ||
1f5b3c3f | 4199 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
f59c7b69 FY |
4200 | |
4201 | iommu->iommu_state[SR_DMAR_FECTL_REG] = | |
4202 | readl(iommu->reg + DMAR_FECTL_REG); | |
4203 | iommu->iommu_state[SR_DMAR_FEDATA_REG] = | |
4204 | readl(iommu->reg + DMAR_FEDATA_REG); | |
4205 | iommu->iommu_state[SR_DMAR_FEADDR_REG] = | |
4206 | readl(iommu->reg + DMAR_FEADDR_REG); | |
4207 | iommu->iommu_state[SR_DMAR_FEUADDR_REG] = | |
4208 | readl(iommu->reg + DMAR_FEUADDR_REG); | |
4209 | ||
1f5b3c3f | 4210 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
f59c7b69 FY |
4211 | } |
4212 | return 0; | |
4213 | ||
4214 | nomem: | |
4215 | for_each_active_iommu(iommu, drhd) | |
4216 | kfree(iommu->iommu_state); | |
4217 | ||
4218 | return -ENOMEM; | |
4219 | } | |
4220 | ||
134fac3f | 4221 | static void iommu_resume(void) |
f59c7b69 FY |
4222 | { |
4223 | struct dmar_drhd_unit *drhd; | |
4224 | struct intel_iommu *iommu = NULL; | |
4225 | unsigned long flag; | |
4226 | ||
4227 | if (init_iommu_hw()) { | |
b779260b JC |
4228 | if (force_on) |
4229 | panic("tboot: IOMMU setup failed, DMAR can not resume!\n"); | |
4230 | else | |
4231 | WARN(1, "IOMMU setup failed, DMAR can not resume!\n"); | |
134fac3f | 4232 | return; |
f59c7b69 FY |
4233 | } |
4234 | ||
4235 | for_each_active_iommu(iommu, drhd) { | |
4236 | ||
1f5b3c3f | 4237 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
f59c7b69 FY |
4238 | |
4239 | writel(iommu->iommu_state[SR_DMAR_FECTL_REG], | |
4240 | iommu->reg + DMAR_FECTL_REG); | |
4241 | writel(iommu->iommu_state[SR_DMAR_FEDATA_REG], | |
4242 | iommu->reg + DMAR_FEDATA_REG); | |
4243 | writel(iommu->iommu_state[SR_DMAR_FEADDR_REG], | |
4244 | iommu->reg + DMAR_FEADDR_REG); | |
4245 | writel(iommu->iommu_state[SR_DMAR_FEUADDR_REG], | |
4246 | iommu->reg + DMAR_FEUADDR_REG); | |
4247 | ||
1f5b3c3f | 4248 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
f59c7b69 FY |
4249 | } |
4250 | ||
4251 | for_each_active_iommu(iommu, drhd) | |
4252 | kfree(iommu->iommu_state); | |
f59c7b69 FY |
4253 | } |
4254 | ||
134fac3f | 4255 | static struct syscore_ops iommu_syscore_ops = { |
f59c7b69 FY |
4256 | .resume = iommu_resume, |
4257 | .suspend = iommu_suspend, | |
4258 | }; | |
4259 | ||
134fac3f | 4260 | static void __init init_iommu_pm_ops(void) |
f59c7b69 | 4261 | { |
134fac3f | 4262 | register_syscore_ops(&iommu_syscore_ops); |
f59c7b69 FY |
4263 | } |
4264 | ||
4265 | #else | |
99592ba4 | 4266 | static inline void init_iommu_pm_ops(void) {} |
f59c7b69 FY |
4267 | #endif /* CONFIG_PM */ |
4268 | ||
318fe7df | 4269 | |
c2a0b538 | 4270 | int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg) |
318fe7df SS |
4271 | { |
4272 | struct acpi_dmar_reserved_memory *rmrr; | |
4273 | struct dmar_rmrr_unit *rmrru; | |
4274 | ||
4275 | rmrru = kzalloc(sizeof(*rmrru), GFP_KERNEL); | |
4276 | if (!rmrru) | |
4277 | return -ENOMEM; | |
4278 | ||
4279 | rmrru->hdr = header; | |
4280 | rmrr = (struct acpi_dmar_reserved_memory *)header; | |
4281 | rmrru->base_address = rmrr->base_address; | |
4282 | rmrru->end_address = rmrr->end_address; | |
2e455289 JL |
4283 | rmrru->devices = dmar_alloc_dev_scope((void *)(rmrr + 1), |
4284 | ((void *)rmrr) + rmrr->header.length, | |
4285 | &rmrru->devices_cnt); | |
4286 | if (rmrru->devices_cnt && rmrru->devices == NULL) { | |
4287 | kfree(rmrru); | |
4288 | return -ENOMEM; | |
4289 | } | |
318fe7df | 4290 | |
2e455289 | 4291 | list_add(&rmrru->list, &dmar_rmrr_units); |
318fe7df | 4292 | |
2e455289 | 4293 | return 0; |
318fe7df SS |
4294 | } |
4295 | ||
6b197249 JL |
4296 | static struct dmar_atsr_unit *dmar_find_atsr(struct acpi_dmar_atsr *atsr) |
4297 | { | |
4298 | struct dmar_atsr_unit *atsru; | |
4299 | struct acpi_dmar_atsr *tmp; | |
4300 | ||
4301 | list_for_each_entry_rcu(atsru, &dmar_atsr_units, list) { | |
4302 | tmp = (struct acpi_dmar_atsr *)atsru->hdr; | |
4303 | if (atsr->segment != tmp->segment) | |
4304 | continue; | |
4305 | if (atsr->header.length != tmp->header.length) | |
4306 | continue; | |
4307 | if (memcmp(atsr, tmp, atsr->header.length) == 0) | |
4308 | return atsru; | |
4309 | } | |
4310 | ||
4311 | return NULL; | |
4312 | } | |
4313 | ||
4314 | int dmar_parse_one_atsr(struct acpi_dmar_header *hdr, void *arg) | |
318fe7df SS |
4315 | { |
4316 | struct acpi_dmar_atsr *atsr; | |
4317 | struct dmar_atsr_unit *atsru; | |
4318 | ||
6b197249 JL |
4319 | if (system_state != SYSTEM_BOOTING && !intel_iommu_enabled) |
4320 | return 0; | |
4321 | ||
318fe7df | 4322 | atsr = container_of(hdr, struct acpi_dmar_atsr, header); |
6b197249 JL |
4323 | atsru = dmar_find_atsr(atsr); |
4324 | if (atsru) | |
4325 | return 0; | |
4326 | ||
4327 | atsru = kzalloc(sizeof(*atsru) + hdr->length, GFP_KERNEL); | |
318fe7df SS |
4328 | if (!atsru) |
4329 | return -ENOMEM; | |
4330 | ||
6b197249 JL |
4331 | /* |
4332 | * If memory is allocated from slab by ACPI _DSM method, we need to | |
4333 | * copy the memory content because the memory buffer will be freed | |
4334 | * on return. | |
4335 | */ | |
4336 | atsru->hdr = (void *)(atsru + 1); | |
4337 | memcpy(atsru->hdr, hdr, hdr->length); | |
318fe7df | 4338 | atsru->include_all = atsr->flags & 0x1; |
2e455289 JL |
4339 | if (!atsru->include_all) { |
4340 | atsru->devices = dmar_alloc_dev_scope((void *)(atsr + 1), | |
4341 | (void *)atsr + atsr->header.length, | |
4342 | &atsru->devices_cnt); | |
4343 | if (atsru->devices_cnt && atsru->devices == NULL) { | |
4344 | kfree(atsru); | |
4345 | return -ENOMEM; | |
4346 | } | |
4347 | } | |
318fe7df | 4348 | |
0e242612 | 4349 | list_add_rcu(&atsru->list, &dmar_atsr_units); |
318fe7df SS |
4350 | |
4351 | return 0; | |
4352 | } | |
4353 | ||
9bdc531e JL |
4354 | static void intel_iommu_free_atsr(struct dmar_atsr_unit *atsru) |
4355 | { | |
4356 | dmar_free_dev_scope(&atsru->devices, &atsru->devices_cnt); | |
4357 | kfree(atsru); | |
4358 | } | |
4359 | ||
6b197249 JL |
4360 | int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg) |
4361 | { | |
4362 | struct acpi_dmar_atsr *atsr; | |
4363 | struct dmar_atsr_unit *atsru; | |
4364 | ||
4365 | atsr = container_of(hdr, struct acpi_dmar_atsr, header); | |
4366 | atsru = dmar_find_atsr(atsr); | |
4367 | if (atsru) { | |
4368 | list_del_rcu(&atsru->list); | |
4369 | synchronize_rcu(); | |
4370 | intel_iommu_free_atsr(atsru); | |
4371 | } | |
4372 | ||
4373 | return 0; | |
4374 | } | |
4375 | ||
4376 | int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg) | |
4377 | { | |
4378 | int i; | |
4379 | struct device *dev; | |
4380 | struct acpi_dmar_atsr *atsr; | |
4381 | struct dmar_atsr_unit *atsru; | |
4382 | ||
4383 | atsr = container_of(hdr, struct acpi_dmar_atsr, header); | |
4384 | atsru = dmar_find_atsr(atsr); | |
4385 | if (!atsru) | |
4386 | return 0; | |
4387 | ||
194dc870 | 4388 | if (!atsru->include_all && atsru->devices && atsru->devices_cnt) { |
6b197249 JL |
4389 | for_each_active_dev_scope(atsru->devices, atsru->devices_cnt, |
4390 | i, dev) | |
4391 | return -EBUSY; | |
194dc870 | 4392 | } |
6b197249 JL |
4393 | |
4394 | return 0; | |
4395 | } | |
4396 | ||
ffebeb46 JL |
4397 | static int intel_iommu_add(struct dmar_drhd_unit *dmaru) |
4398 | { | |
4399 | int sp, ret = 0; | |
4400 | struct intel_iommu *iommu = dmaru->iommu; | |
4401 | ||
4402 | if (g_iommus[iommu->seq_id]) | |
4403 | return 0; | |
4404 | ||
4405 | if (hw_pass_through && !ecap_pass_through(iommu->ecap)) { | |
9f10e5bf | 4406 | pr_warn("%s: Doesn't support hardware pass through.\n", |
ffebeb46 JL |
4407 | iommu->name); |
4408 | return -ENXIO; | |
4409 | } | |
4410 | if (!ecap_sc_support(iommu->ecap) && | |
4411 | domain_update_iommu_snooping(iommu)) { | |
9f10e5bf | 4412 | pr_warn("%s: Doesn't support snooping.\n", |
ffebeb46 JL |
4413 | iommu->name); |
4414 | return -ENXIO; | |
4415 | } | |
4416 | sp = domain_update_iommu_superpage(iommu) - 1; | |
4417 | if (sp >= 0 && !(cap_super_page_val(iommu->cap) & (1 << sp))) { | |
9f10e5bf | 4418 | pr_warn("%s: Doesn't support large page.\n", |
ffebeb46 JL |
4419 | iommu->name); |
4420 | return -ENXIO; | |
4421 | } | |
4422 | ||
4423 | /* | |
4424 | * Disable translation if already enabled prior to OS handover. | |
4425 | */ | |
4426 | if (iommu->gcmd & DMA_GCMD_TE) | |
4427 | iommu_disable_translation(iommu); | |
4428 | ||
4429 | g_iommus[iommu->seq_id] = iommu; | |
4430 | ret = iommu_init_domains(iommu); | |
4431 | if (ret == 0) | |
4432 | ret = iommu_alloc_root_entry(iommu); | |
4433 | if (ret) | |
4434 | goto out; | |
4435 | ||
8a94ade4 DW |
4436 | #ifdef CONFIG_INTEL_IOMMU_SVM |
4437 | if (pasid_enabled(iommu)) | |
4438 | intel_svm_alloc_pasid_tables(iommu); | |
4439 | #endif | |
4440 | ||
ffebeb46 JL |
4441 | if (dmaru->ignored) { |
4442 | /* | |
4443 | * we always have to disable PMRs or DMA may fail on this device | |
4444 | */ | |
4445 | if (force_on) | |
4446 | iommu_disable_protect_mem_regions(iommu); | |
4447 | return 0; | |
4448 | } | |
4449 | ||
4450 | intel_iommu_init_qi(iommu); | |
4451 | iommu_flush_write_buffer(iommu); | |
a222a7f0 DW |
4452 | |
4453 | #ifdef CONFIG_INTEL_IOMMU_SVM | |
4454 | if (pasid_enabled(iommu) && ecap_prs(iommu->ecap)) { | |
4455 | ret = intel_svm_enable_prq(iommu); | |
4456 | if (ret) | |
4457 | goto disable_iommu; | |
4458 | } | |
4459 | #endif | |
ffebeb46 JL |
4460 | ret = dmar_set_interrupt(iommu); |
4461 | if (ret) | |
4462 | goto disable_iommu; | |
4463 | ||
4464 | iommu_set_root_entry(iommu); | |
4465 | iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); | |
4466 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); | |
4467 | iommu_enable_translation(iommu); | |
4468 | ||
ffebeb46 JL |
4469 | iommu_disable_protect_mem_regions(iommu); |
4470 | return 0; | |
4471 | ||
4472 | disable_iommu: | |
4473 | disable_dmar_iommu(iommu); | |
4474 | out: | |
4475 | free_dmar_iommu(iommu); | |
4476 | return ret; | |
4477 | } | |
4478 | ||
6b197249 JL |
4479 | int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert) |
4480 | { | |
ffebeb46 JL |
4481 | int ret = 0; |
4482 | struct intel_iommu *iommu = dmaru->iommu; | |
4483 | ||
4484 | if (!intel_iommu_enabled) | |
4485 | return 0; | |
4486 | if (iommu == NULL) | |
4487 | return -EINVAL; | |
4488 | ||
4489 | if (insert) { | |
4490 | ret = intel_iommu_add(dmaru); | |
4491 | } else { | |
4492 | disable_dmar_iommu(iommu); | |
4493 | free_dmar_iommu(iommu); | |
4494 | } | |
4495 | ||
4496 | return ret; | |
6b197249 JL |
4497 | } |
4498 | ||
9bdc531e JL |
4499 | static void intel_iommu_free_dmars(void) |
4500 | { | |
4501 | struct dmar_rmrr_unit *rmrru, *rmrr_n; | |
4502 | struct dmar_atsr_unit *atsru, *atsr_n; | |
4503 | ||
4504 | list_for_each_entry_safe(rmrru, rmrr_n, &dmar_rmrr_units, list) { | |
4505 | list_del(&rmrru->list); | |
4506 | dmar_free_dev_scope(&rmrru->devices, &rmrru->devices_cnt); | |
4507 | kfree(rmrru); | |
318fe7df SS |
4508 | } |
4509 | ||
9bdc531e JL |
4510 | list_for_each_entry_safe(atsru, atsr_n, &dmar_atsr_units, list) { |
4511 | list_del(&atsru->list); | |
4512 | intel_iommu_free_atsr(atsru); | |
4513 | } | |
318fe7df SS |
4514 | } |
4515 | ||
4516 | int dmar_find_matched_atsr_unit(struct pci_dev *dev) | |
4517 | { | |
b683b230 | 4518 | int i, ret = 1; |
318fe7df | 4519 | struct pci_bus *bus; |
832bd858 DW |
4520 | struct pci_dev *bridge = NULL; |
4521 | struct device *tmp; | |
318fe7df SS |
4522 | struct acpi_dmar_atsr *atsr; |
4523 | struct dmar_atsr_unit *atsru; | |
4524 | ||
4525 | dev = pci_physfn(dev); | |
318fe7df | 4526 | for (bus = dev->bus; bus; bus = bus->parent) { |
b5f82ddf | 4527 | bridge = bus->self; |
d14053b3 DW |
4528 | /* If it's an integrated device, allow ATS */ |
4529 | if (!bridge) | |
4530 | return 1; | |
4531 | /* Connected via non-PCIe: no ATS */ | |
4532 | if (!pci_is_pcie(bridge) || | |
62f87c0e | 4533 | pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) |
318fe7df | 4534 | return 0; |
d14053b3 | 4535 | /* If we found the root port, look it up in the ATSR */ |
b5f82ddf | 4536 | if (pci_pcie_type(bridge) == PCI_EXP_TYPE_ROOT_PORT) |
318fe7df | 4537 | break; |
318fe7df SS |
4538 | } |
4539 | ||
0e242612 | 4540 | rcu_read_lock(); |
b5f82ddf JL |
4541 | list_for_each_entry_rcu(atsru, &dmar_atsr_units, list) { |
4542 | atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); | |
4543 | if (atsr->segment != pci_domain_nr(dev->bus)) | |
4544 | continue; | |
4545 | ||
b683b230 | 4546 | for_each_dev_scope(atsru->devices, atsru->devices_cnt, i, tmp) |
832bd858 | 4547 | if (tmp == &bridge->dev) |
b683b230 | 4548 | goto out; |
b5f82ddf JL |
4549 | |
4550 | if (atsru->include_all) | |
b683b230 | 4551 | goto out; |
b5f82ddf | 4552 | } |
b683b230 JL |
4553 | ret = 0; |
4554 | out: | |
0e242612 | 4555 | rcu_read_unlock(); |
318fe7df | 4556 | |
b683b230 | 4557 | return ret; |
318fe7df SS |
4558 | } |
4559 | ||
59ce0515 JL |
4560 | int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) |
4561 | { | |
4562 | int ret = 0; | |
4563 | struct dmar_rmrr_unit *rmrru; | |
4564 | struct dmar_atsr_unit *atsru; | |
4565 | struct acpi_dmar_atsr *atsr; | |
4566 | struct acpi_dmar_reserved_memory *rmrr; | |
4567 | ||
4568 | if (!intel_iommu_enabled && system_state != SYSTEM_BOOTING) | |
4569 | return 0; | |
4570 | ||
4571 | list_for_each_entry(rmrru, &dmar_rmrr_units, list) { | |
4572 | rmrr = container_of(rmrru->hdr, | |
4573 | struct acpi_dmar_reserved_memory, header); | |
4574 | if (info->event == BUS_NOTIFY_ADD_DEVICE) { | |
4575 | ret = dmar_insert_dev_scope(info, (void *)(rmrr + 1), | |
4576 | ((void *)rmrr) + rmrr->header.length, | |
4577 | rmrr->segment, rmrru->devices, | |
4578 | rmrru->devices_cnt); | |
27e24950 | 4579 | if(ret < 0) |
59ce0515 | 4580 | return ret; |
e6a8c9b3 | 4581 | } else if (info->event == BUS_NOTIFY_REMOVED_DEVICE) { |
27e24950 JL |
4582 | dmar_remove_dev_scope(info, rmrr->segment, |
4583 | rmrru->devices, rmrru->devices_cnt); | |
59ce0515 JL |
4584 | } |
4585 | } | |
4586 | ||
4587 | list_for_each_entry(atsru, &dmar_atsr_units, list) { | |
4588 | if (atsru->include_all) | |
4589 | continue; | |
4590 | ||
4591 | atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); | |
4592 | if (info->event == BUS_NOTIFY_ADD_DEVICE) { | |
4593 | ret = dmar_insert_dev_scope(info, (void *)(atsr + 1), | |
4594 | (void *)atsr + atsr->header.length, | |
4595 | atsr->segment, atsru->devices, | |
4596 | atsru->devices_cnt); | |
4597 | if (ret > 0) | |
4598 | break; | |
4599 | else if(ret < 0) | |
4600 | return ret; | |
e6a8c9b3 | 4601 | } else if (info->event == BUS_NOTIFY_REMOVED_DEVICE) { |
59ce0515 JL |
4602 | if (dmar_remove_dev_scope(info, atsr->segment, |
4603 | atsru->devices, atsru->devices_cnt)) | |
4604 | break; | |
4605 | } | |
4606 | } | |
4607 | ||
4608 | return 0; | |
4609 | } | |
4610 | ||
99dcaded FY |
4611 | /* |
4612 | * Here we only respond to action of unbound device from driver. | |
4613 | * | |
4614 | * Added device is not attached to its DMAR domain here yet. That will happen | |
4615 | * when mapping the device to iova. | |
4616 | */ | |
4617 | static int device_notifier(struct notifier_block *nb, | |
4618 | unsigned long action, void *data) | |
4619 | { | |
4620 | struct device *dev = data; | |
99dcaded FY |
4621 | struct dmar_domain *domain; |
4622 | ||
3d89194a | 4623 | if (iommu_dummy(dev)) |
44cd613c DW |
4624 | return 0; |
4625 | ||
1196c2fb | 4626 | if (action != BUS_NOTIFY_REMOVED_DEVICE) |
7e7dfab7 JL |
4627 | return 0; |
4628 | ||
1525a29a | 4629 | domain = find_domain(dev); |
99dcaded FY |
4630 | if (!domain) |
4631 | return 0; | |
4632 | ||
e6de0f8d | 4633 | dmar_remove_one_dev_info(domain, dev); |
ab8dfe25 | 4634 | if (!domain_type_is_vm_or_si(domain) && list_empty(&domain->devices)) |
7e7dfab7 | 4635 | domain_exit(domain); |
a97590e5 | 4636 | |
99dcaded FY |
4637 | return 0; |
4638 | } | |
4639 | ||
4640 | static struct notifier_block device_nb = { | |
4641 | .notifier_call = device_notifier, | |
4642 | }; | |
4643 | ||
75f05569 JL |
4644 | static int intel_iommu_memory_notifier(struct notifier_block *nb, |
4645 | unsigned long val, void *v) | |
4646 | { | |
4647 | struct memory_notify *mhp = v; | |
4648 | unsigned long long start, end; | |
4649 | unsigned long start_vpfn, last_vpfn; | |
4650 | ||
4651 | switch (val) { | |
4652 | case MEM_GOING_ONLINE: | |
4653 | start = mhp->start_pfn << PAGE_SHIFT; | |
4654 | end = ((mhp->start_pfn + mhp->nr_pages) << PAGE_SHIFT) - 1; | |
4655 | if (iommu_domain_identity_map(si_domain, start, end)) { | |
9f10e5bf | 4656 | pr_warn("Failed to build identity map for [%llx-%llx]\n", |
75f05569 JL |
4657 | start, end); |
4658 | return NOTIFY_BAD; | |
4659 | } | |
4660 | break; | |
4661 | ||
4662 | case MEM_OFFLINE: | |
4663 | case MEM_CANCEL_ONLINE: | |
4664 | start_vpfn = mm_to_dma_pfn(mhp->start_pfn); | |
4665 | last_vpfn = mm_to_dma_pfn(mhp->start_pfn + mhp->nr_pages - 1); | |
4666 | while (start_vpfn <= last_vpfn) { | |
4667 | struct iova *iova; | |
4668 | struct dmar_drhd_unit *drhd; | |
4669 | struct intel_iommu *iommu; | |
ea8ea460 | 4670 | struct page *freelist; |
75f05569 JL |
4671 | |
4672 | iova = find_iova(&si_domain->iovad, start_vpfn); | |
4673 | if (iova == NULL) { | |
9f10e5bf | 4674 | pr_debug("Failed get IOVA for PFN %lx\n", |
75f05569 JL |
4675 | start_vpfn); |
4676 | break; | |
4677 | } | |
4678 | ||
4679 | iova = split_and_remove_iova(&si_domain->iovad, iova, | |
4680 | start_vpfn, last_vpfn); | |
4681 | if (iova == NULL) { | |
9f10e5bf | 4682 | pr_warn("Failed to split IOVA PFN [%lx-%lx]\n", |
75f05569 JL |
4683 | start_vpfn, last_vpfn); |
4684 | return NOTIFY_BAD; | |
4685 | } | |
4686 | ||
ea8ea460 DW |
4687 | freelist = domain_unmap(si_domain, iova->pfn_lo, |
4688 | iova->pfn_hi); | |
4689 | ||
75f05569 JL |
4690 | rcu_read_lock(); |
4691 | for_each_active_iommu(iommu, drhd) | |
a1ddcbe9 | 4692 | iommu_flush_iotlb_psi(iommu, si_domain, |
a156ef99 | 4693 | iova->pfn_lo, iova_size(iova), |
ea8ea460 | 4694 | !freelist, 0); |
75f05569 | 4695 | rcu_read_unlock(); |
ea8ea460 | 4696 | dma_free_pagelist(freelist); |
75f05569 JL |
4697 | |
4698 | start_vpfn = iova->pfn_hi + 1; | |
4699 | free_iova_mem(iova); | |
4700 | } | |
4701 | break; | |
4702 | } | |
4703 | ||
4704 | return NOTIFY_OK; | |
4705 | } | |
4706 | ||
4707 | static struct notifier_block intel_iommu_memory_nb = { | |
4708 | .notifier_call = intel_iommu_memory_notifier, | |
4709 | .priority = 0 | |
4710 | }; | |
4711 | ||
22e2f9fa OP |
4712 | static void free_all_cpu_cached_iovas(unsigned int cpu) |
4713 | { | |
4714 | int i; | |
4715 | ||
4716 | for (i = 0; i < g_num_of_iommus; i++) { | |
4717 | struct intel_iommu *iommu = g_iommus[i]; | |
4718 | struct dmar_domain *domain; | |
0caa7616 | 4719 | int did; |
22e2f9fa OP |
4720 | |
4721 | if (!iommu) | |
4722 | continue; | |
4723 | ||
3bd4f911 | 4724 | for (did = 0; did < cap_ndoms(iommu->cap); did++) { |
0caa7616 | 4725 | domain = get_iommu_domain(iommu, (u16)did); |
22e2f9fa OP |
4726 | |
4727 | if (!domain) | |
4728 | continue; | |
4729 | free_cpu_cached_iovas(cpu, &domain->iovad); | |
4730 | } | |
4731 | } | |
4732 | } | |
4733 | ||
aa473240 OP |
4734 | static int intel_iommu_cpu_notifier(struct notifier_block *nfb, |
4735 | unsigned long action, void *v) | |
4736 | { | |
4737 | unsigned int cpu = (unsigned long)v; | |
4738 | ||
4739 | switch (action) { | |
4740 | case CPU_DEAD: | |
4741 | case CPU_DEAD_FROZEN: | |
22e2f9fa | 4742 | free_all_cpu_cached_iovas(cpu); |
aa473240 OP |
4743 | flush_unmaps_timeout(cpu); |
4744 | break; | |
4745 | } | |
4746 | return NOTIFY_OK; | |
4747 | } | |
4748 | ||
4749 | static struct notifier_block intel_iommu_cpu_nb = { | |
4750 | .notifier_call = intel_iommu_cpu_notifier, | |
4751 | }; | |
a5459cfe AW |
4752 | |
4753 | static ssize_t intel_iommu_show_version(struct device *dev, | |
4754 | struct device_attribute *attr, | |
4755 | char *buf) | |
4756 | { | |
4757 | struct intel_iommu *iommu = dev_get_drvdata(dev); | |
4758 | u32 ver = readl(iommu->reg + DMAR_VER_REG); | |
4759 | return sprintf(buf, "%d:%d\n", | |
4760 | DMAR_VER_MAJOR(ver), DMAR_VER_MINOR(ver)); | |
4761 | } | |
4762 | static DEVICE_ATTR(version, S_IRUGO, intel_iommu_show_version, NULL); | |
4763 | ||
4764 | static ssize_t intel_iommu_show_address(struct device *dev, | |
4765 | struct device_attribute *attr, | |
4766 | char *buf) | |
4767 | { | |
4768 | struct intel_iommu *iommu = dev_get_drvdata(dev); | |
4769 | return sprintf(buf, "%llx\n", iommu->reg_phys); | |
4770 | } | |
4771 | static DEVICE_ATTR(address, S_IRUGO, intel_iommu_show_address, NULL); | |
4772 | ||
4773 | static ssize_t intel_iommu_show_cap(struct device *dev, | |
4774 | struct device_attribute *attr, | |
4775 | char *buf) | |
4776 | { | |
4777 | struct intel_iommu *iommu = dev_get_drvdata(dev); | |
4778 | return sprintf(buf, "%llx\n", iommu->cap); | |
4779 | } | |
4780 | static DEVICE_ATTR(cap, S_IRUGO, intel_iommu_show_cap, NULL); | |
4781 | ||
4782 | static ssize_t intel_iommu_show_ecap(struct device *dev, | |
4783 | struct device_attribute *attr, | |
4784 | char *buf) | |
4785 | { | |
4786 | struct intel_iommu *iommu = dev_get_drvdata(dev); | |
4787 | return sprintf(buf, "%llx\n", iommu->ecap); | |
4788 | } | |
4789 | static DEVICE_ATTR(ecap, S_IRUGO, intel_iommu_show_ecap, NULL); | |
4790 | ||
2238c082 AW |
4791 | static ssize_t intel_iommu_show_ndoms(struct device *dev, |
4792 | struct device_attribute *attr, | |
4793 | char *buf) | |
4794 | { | |
4795 | struct intel_iommu *iommu = dev_get_drvdata(dev); | |
4796 | return sprintf(buf, "%ld\n", cap_ndoms(iommu->cap)); | |
4797 | } | |
4798 | static DEVICE_ATTR(domains_supported, S_IRUGO, intel_iommu_show_ndoms, NULL); | |
4799 | ||
4800 | static ssize_t intel_iommu_show_ndoms_used(struct device *dev, | |
4801 | struct device_attribute *attr, | |
4802 | char *buf) | |
4803 | { | |
4804 | struct intel_iommu *iommu = dev_get_drvdata(dev); | |
4805 | return sprintf(buf, "%d\n", bitmap_weight(iommu->domain_ids, | |
4806 | cap_ndoms(iommu->cap))); | |
4807 | } | |
4808 | static DEVICE_ATTR(domains_used, S_IRUGO, intel_iommu_show_ndoms_used, NULL); | |
4809 | ||
a5459cfe AW |
4810 | static struct attribute *intel_iommu_attrs[] = { |
4811 | &dev_attr_version.attr, | |
4812 | &dev_attr_address.attr, | |
4813 | &dev_attr_cap.attr, | |
4814 | &dev_attr_ecap.attr, | |
2238c082 AW |
4815 | &dev_attr_domains_supported.attr, |
4816 | &dev_attr_domains_used.attr, | |
a5459cfe AW |
4817 | NULL, |
4818 | }; | |
4819 | ||
4820 | static struct attribute_group intel_iommu_group = { | |
4821 | .name = "intel-iommu", | |
4822 | .attrs = intel_iommu_attrs, | |
4823 | }; | |
4824 | ||
4825 | const struct attribute_group *intel_iommu_groups[] = { | |
4826 | &intel_iommu_group, | |
4827 | NULL, | |
4828 | }; | |
4829 | ||
ba395927 KA |
4830 | int __init intel_iommu_init(void) |
4831 | { | |
9bdc531e | 4832 | int ret = -ENODEV; |
3a93c841 | 4833 | struct dmar_drhd_unit *drhd; |
7c919779 | 4834 | struct intel_iommu *iommu; |
ba395927 | 4835 | |
a59b50e9 JC |
4836 | /* VT-d is required for a TXT/tboot launch, so enforce that */ |
4837 | force_on = tboot_force_iommu(); | |
4838 | ||
3a5670e8 JL |
4839 | if (iommu_init_mempool()) { |
4840 | if (force_on) | |
4841 | panic("tboot: Failed to initialize iommu memory\n"); | |
4842 | return -ENOMEM; | |
4843 | } | |
4844 | ||
4845 | down_write(&dmar_global_lock); | |
a59b50e9 JC |
4846 | if (dmar_table_init()) { |
4847 | if (force_on) | |
4848 | panic("tboot: Failed to initialize DMAR table\n"); | |
9bdc531e | 4849 | goto out_free_dmar; |
a59b50e9 | 4850 | } |
ba395927 | 4851 | |
c2c7286a | 4852 | if (dmar_dev_scope_init() < 0) { |
a59b50e9 JC |
4853 | if (force_on) |
4854 | panic("tboot: Failed to initialize DMAR device scope\n"); | |
9bdc531e | 4855 | goto out_free_dmar; |
a59b50e9 | 4856 | } |
1886e8a9 | 4857 | |
75f1cdf1 | 4858 | if (no_iommu || dmar_disabled) |
9bdc531e | 4859 | goto out_free_dmar; |
2ae21010 | 4860 | |
318fe7df | 4861 | if (list_empty(&dmar_rmrr_units)) |
9f10e5bf | 4862 | pr_info("No RMRR found\n"); |
318fe7df SS |
4863 | |
4864 | if (list_empty(&dmar_atsr_units)) | |
9f10e5bf | 4865 | pr_info("No ATSR found\n"); |
318fe7df | 4866 | |
51a63e67 JC |
4867 | if (dmar_init_reserved_ranges()) { |
4868 | if (force_on) | |
4869 | panic("tboot: Failed to reserve iommu ranges\n"); | |
3a5670e8 | 4870 | goto out_free_reserved_range; |
51a63e67 | 4871 | } |
ba395927 KA |
4872 | |
4873 | init_no_remapping_devices(); | |
4874 | ||
b779260b | 4875 | ret = init_dmars(); |
ba395927 | 4876 | if (ret) { |
a59b50e9 JC |
4877 | if (force_on) |
4878 | panic("tboot: Failed to initialize DMARs\n"); | |
9f10e5bf | 4879 | pr_err("Initialization failed\n"); |
9bdc531e | 4880 | goto out_free_reserved_range; |
ba395927 | 4881 | } |
3a5670e8 | 4882 | up_write(&dmar_global_lock); |
9f10e5bf | 4883 | pr_info("Intel(R) Virtualization Technology for Directed I/O\n"); |
ba395927 | 4884 | |
75f1cdf1 FT |
4885 | #ifdef CONFIG_SWIOTLB |
4886 | swiotlb = 0; | |
4887 | #endif | |
19943b0e | 4888 | dma_ops = &intel_dma_ops; |
4ed0d3e6 | 4889 | |
134fac3f | 4890 | init_iommu_pm_ops(); |
a8bcbb0d | 4891 | |
a5459cfe AW |
4892 | for_each_active_iommu(iommu, drhd) |
4893 | iommu->iommu_dev = iommu_device_create(NULL, iommu, | |
4894 | intel_iommu_groups, | |
2439d4aa | 4895 | "%s", iommu->name); |
a5459cfe | 4896 | |
4236d97d | 4897 | bus_set_iommu(&pci_bus_type, &intel_iommu_ops); |
99dcaded | 4898 | bus_register_notifier(&pci_bus_type, &device_nb); |
75f05569 JL |
4899 | if (si_domain && !hw_pass_through) |
4900 | register_memory_notifier(&intel_iommu_memory_nb); | |
aa473240 | 4901 | register_hotcpu_notifier(&intel_iommu_cpu_nb); |
99dcaded | 4902 | |
8bc1f85c ED |
4903 | intel_iommu_enabled = 1; |
4904 | ||
ba395927 | 4905 | return 0; |
9bdc531e JL |
4906 | |
4907 | out_free_reserved_range: | |
4908 | put_iova_domain(&reserved_iova_list); | |
9bdc531e JL |
4909 | out_free_dmar: |
4910 | intel_iommu_free_dmars(); | |
3a5670e8 JL |
4911 | up_write(&dmar_global_lock); |
4912 | iommu_exit_mempool(); | |
9bdc531e | 4913 | return ret; |
ba395927 | 4914 | } |
e820482c | 4915 | |
2452d9db | 4916 | static int domain_context_clear_one_cb(struct pci_dev *pdev, u16 alias, void *opaque) |
579305f7 AW |
4917 | { |
4918 | struct intel_iommu *iommu = opaque; | |
4919 | ||
2452d9db | 4920 | domain_context_clear_one(iommu, PCI_BUS_NUM(alias), alias & 0xff); |
579305f7 AW |
4921 | return 0; |
4922 | } | |
4923 | ||
4924 | /* | |
4925 | * NB - intel-iommu lacks any sort of reference counting for the users of | |
4926 | * dependent devices. If multiple endpoints have intersecting dependent | |
4927 | * devices, unbinding the driver from any one of them will possibly leave | |
4928 | * the others unable to operate. | |
4929 | */ | |
2452d9db | 4930 | static void domain_context_clear(struct intel_iommu *iommu, struct device *dev) |
3199aa6b | 4931 | { |
0bcb3e28 | 4932 | if (!iommu || !dev || !dev_is_pci(dev)) |
3199aa6b HW |
4933 | return; |
4934 | ||
2452d9db | 4935 | pci_for_each_dma_alias(to_pci_dev(dev), &domain_context_clear_one_cb, iommu); |
3199aa6b HW |
4936 | } |
4937 | ||
127c7615 | 4938 | static void __dmar_remove_one_dev_info(struct device_domain_info *info) |
c7151a8d | 4939 | { |
c7151a8d WH |
4940 | struct intel_iommu *iommu; |
4941 | unsigned long flags; | |
c7151a8d | 4942 | |
55d94043 JR |
4943 | assert_spin_locked(&device_domain_lock); |
4944 | ||
127c7615 | 4945 | if (WARN_ON(!info)) |
c7151a8d WH |
4946 | return; |
4947 | ||
127c7615 | 4948 | iommu = info->iommu; |
c7151a8d | 4949 | |
127c7615 JR |
4950 | if (info->dev) { |
4951 | iommu_disable_dev_iotlb(info); | |
4952 | domain_context_clear(iommu, info->dev); | |
4953 | } | |
c7151a8d | 4954 | |
b608ac3b | 4955 | unlink_domain_info(info); |
c7151a8d | 4956 | |
d160aca5 | 4957 | spin_lock_irqsave(&iommu->lock, flags); |
127c7615 | 4958 | domain_detach_iommu(info->domain, iommu); |
d160aca5 | 4959 | spin_unlock_irqrestore(&iommu->lock, flags); |
c7151a8d | 4960 | |
127c7615 | 4961 | free_devinfo_mem(info); |
c7151a8d | 4962 | } |
c7151a8d | 4963 | |
55d94043 JR |
4964 | static void dmar_remove_one_dev_info(struct dmar_domain *domain, |
4965 | struct device *dev) | |
4966 | { | |
127c7615 | 4967 | struct device_domain_info *info; |
55d94043 | 4968 | unsigned long flags; |
3e7abe25 | 4969 | |
55d94043 | 4970 | spin_lock_irqsave(&device_domain_lock, flags); |
127c7615 JR |
4971 | info = dev->archdata.iommu; |
4972 | __dmar_remove_one_dev_info(info); | |
55d94043 | 4973 | spin_unlock_irqrestore(&device_domain_lock, flags); |
c7151a8d WH |
4974 | } |
4975 | ||
2c2e2c38 | 4976 | static int md_domain_init(struct dmar_domain *domain, int guest_width) |
5e98c4b1 WH |
4977 | { |
4978 | int adjust_width; | |
4979 | ||
0fb5fe87 RM |
4980 | init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN, |
4981 | DMA_32BIT_PFN); | |
5e98c4b1 WH |
4982 | domain_reserve_special_ranges(domain); |
4983 | ||
4984 | /* calculate AGAW */ | |
4985 | domain->gaw = guest_width; | |
4986 | adjust_width = guestwidth_to_adjustwidth(guest_width); | |
4987 | domain->agaw = width_to_agaw(adjust_width); | |
4988 | ||
5e98c4b1 | 4989 | domain->iommu_coherency = 0; |
c5b15255 | 4990 | domain->iommu_snooping = 0; |
6dd9a7c7 | 4991 | domain->iommu_superpage = 0; |
fe40f1e0 | 4992 | domain->max_addr = 0; |
5e98c4b1 WH |
4993 | |
4994 | /* always allocate the top pgd */ | |
4c923d47 | 4995 | domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid); |
5e98c4b1 WH |
4996 | if (!domain->pgd) |
4997 | return -ENOMEM; | |
4998 | domain_flush_cache(domain, domain->pgd, PAGE_SIZE); | |
4999 | return 0; | |
5000 | } | |
5001 | ||
00a77deb | 5002 | static struct iommu_domain *intel_iommu_domain_alloc(unsigned type) |
38717946 | 5003 | { |
5d450806 | 5004 | struct dmar_domain *dmar_domain; |
00a77deb JR |
5005 | struct iommu_domain *domain; |
5006 | ||
5007 | if (type != IOMMU_DOMAIN_UNMANAGED) | |
5008 | return NULL; | |
38717946 | 5009 | |
ab8dfe25 | 5010 | dmar_domain = alloc_domain(DOMAIN_FLAG_VIRTUAL_MACHINE); |
5d450806 | 5011 | if (!dmar_domain) { |
9f10e5bf | 5012 | pr_err("Can't allocate dmar_domain\n"); |
00a77deb | 5013 | return NULL; |
38717946 | 5014 | } |
2c2e2c38 | 5015 | if (md_domain_init(dmar_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { |
9f10e5bf | 5016 | pr_err("Domain initialization failed\n"); |
92d03cc8 | 5017 | domain_exit(dmar_domain); |
00a77deb | 5018 | return NULL; |
38717946 | 5019 | } |
8140a95d | 5020 | domain_update_iommu_cap(dmar_domain); |
faa3d6f5 | 5021 | |
00a77deb | 5022 | domain = &dmar_domain->domain; |
8a0e715b JR |
5023 | domain->geometry.aperture_start = 0; |
5024 | domain->geometry.aperture_end = __DOMAIN_MAX_ADDR(dmar_domain->gaw); | |
5025 | domain->geometry.force_aperture = true; | |
5026 | ||
00a77deb | 5027 | return domain; |
38717946 | 5028 | } |
38717946 | 5029 | |
00a77deb | 5030 | static void intel_iommu_domain_free(struct iommu_domain *domain) |
38717946 | 5031 | { |
00a77deb | 5032 | domain_exit(to_dmar_domain(domain)); |
38717946 | 5033 | } |
38717946 | 5034 | |
4c5478c9 JR |
5035 | static int intel_iommu_attach_device(struct iommu_domain *domain, |
5036 | struct device *dev) | |
38717946 | 5037 | { |
00a77deb | 5038 | struct dmar_domain *dmar_domain = to_dmar_domain(domain); |
fe40f1e0 WH |
5039 | struct intel_iommu *iommu; |
5040 | int addr_width; | |
156baca8 | 5041 | u8 bus, devfn; |
faa3d6f5 | 5042 | |
c875d2c1 AW |
5043 | if (device_is_rmrr_locked(dev)) { |
5044 | dev_warn(dev, "Device is ineligible for IOMMU domain attach due to platform RMRR requirement. Contact your platform vendor.\n"); | |
5045 | return -EPERM; | |
5046 | } | |
5047 | ||
7207d8f9 DW |
5048 | /* normally dev is not mapped */ |
5049 | if (unlikely(domain_context_mapped(dev))) { | |
faa3d6f5 WH |
5050 | struct dmar_domain *old_domain; |
5051 | ||
1525a29a | 5052 | old_domain = find_domain(dev); |
faa3d6f5 | 5053 | if (old_domain) { |
d160aca5 | 5054 | rcu_read_lock(); |
de7e8886 | 5055 | dmar_remove_one_dev_info(old_domain, dev); |
d160aca5 | 5056 | rcu_read_unlock(); |
62c22167 JR |
5057 | |
5058 | if (!domain_type_is_vm_or_si(old_domain) && | |
5059 | list_empty(&old_domain->devices)) | |
5060 | domain_exit(old_domain); | |
faa3d6f5 WH |
5061 | } |
5062 | } | |
5063 | ||
156baca8 | 5064 | iommu = device_to_iommu(dev, &bus, &devfn); |
fe40f1e0 WH |
5065 | if (!iommu) |
5066 | return -ENODEV; | |
5067 | ||
5068 | /* check if this iommu agaw is sufficient for max mapped address */ | |
5069 | addr_width = agaw_to_width(iommu->agaw); | |
a99c47a2 TL |
5070 | if (addr_width > cap_mgaw(iommu->cap)) |
5071 | addr_width = cap_mgaw(iommu->cap); | |
5072 | ||
5073 | if (dmar_domain->max_addr > (1LL << addr_width)) { | |
9f10e5bf | 5074 | pr_err("%s: iommu width (%d) is not " |
fe40f1e0 | 5075 | "sufficient for the mapped address (%llx)\n", |
a99c47a2 | 5076 | __func__, addr_width, dmar_domain->max_addr); |
fe40f1e0 WH |
5077 | return -EFAULT; |
5078 | } | |
a99c47a2 TL |
5079 | dmar_domain->gaw = addr_width; |
5080 | ||
5081 | /* | |
5082 | * Knock out extra levels of page tables if necessary | |
5083 | */ | |
5084 | while (iommu->agaw < dmar_domain->agaw) { | |
5085 | struct dma_pte *pte; | |
5086 | ||
5087 | pte = dmar_domain->pgd; | |
5088 | if (dma_pte_present(pte)) { | |
25cbff16 SY |
5089 | dmar_domain->pgd = (struct dma_pte *) |
5090 | phys_to_virt(dma_pte_addr(pte)); | |
7a661013 | 5091 | free_pgtable_page(pte); |
a99c47a2 TL |
5092 | } |
5093 | dmar_domain->agaw--; | |
5094 | } | |
fe40f1e0 | 5095 | |
28ccce0d | 5096 | return domain_add_dev_info(dmar_domain, dev); |
38717946 | 5097 | } |
38717946 | 5098 | |
4c5478c9 JR |
5099 | static void intel_iommu_detach_device(struct iommu_domain *domain, |
5100 | struct device *dev) | |
38717946 | 5101 | { |
e6de0f8d | 5102 | dmar_remove_one_dev_info(to_dmar_domain(domain), dev); |
faa3d6f5 | 5103 | } |
c7151a8d | 5104 | |
b146a1c9 JR |
5105 | static int intel_iommu_map(struct iommu_domain *domain, |
5106 | unsigned long iova, phys_addr_t hpa, | |
5009065d | 5107 | size_t size, int iommu_prot) |
faa3d6f5 | 5108 | { |
00a77deb | 5109 | struct dmar_domain *dmar_domain = to_dmar_domain(domain); |
fe40f1e0 | 5110 | u64 max_addr; |
dde57a21 | 5111 | int prot = 0; |
faa3d6f5 | 5112 | int ret; |
fe40f1e0 | 5113 | |
dde57a21 JR |
5114 | if (iommu_prot & IOMMU_READ) |
5115 | prot |= DMA_PTE_READ; | |
5116 | if (iommu_prot & IOMMU_WRITE) | |
5117 | prot |= DMA_PTE_WRITE; | |
9cf06697 SY |
5118 | if ((iommu_prot & IOMMU_CACHE) && dmar_domain->iommu_snooping) |
5119 | prot |= DMA_PTE_SNP; | |
dde57a21 | 5120 | |
163cc52c | 5121 | max_addr = iova + size; |
dde57a21 | 5122 | if (dmar_domain->max_addr < max_addr) { |
fe40f1e0 WH |
5123 | u64 end; |
5124 | ||
5125 | /* check if minimum agaw is sufficient for mapped address */ | |
8954da1f | 5126 | end = __DOMAIN_MAX_ADDR(dmar_domain->gaw) + 1; |
fe40f1e0 | 5127 | if (end < max_addr) { |
9f10e5bf | 5128 | pr_err("%s: iommu width (%d) is not " |
fe40f1e0 | 5129 | "sufficient for the mapped address (%llx)\n", |
8954da1f | 5130 | __func__, dmar_domain->gaw, max_addr); |
fe40f1e0 WH |
5131 | return -EFAULT; |
5132 | } | |
dde57a21 | 5133 | dmar_domain->max_addr = max_addr; |
fe40f1e0 | 5134 | } |
ad051221 DW |
5135 | /* Round up size to next multiple of PAGE_SIZE, if it and |
5136 | the low bits of hpa would take us onto the next page */ | |
88cb6a74 | 5137 | size = aligned_nrpages(hpa, size); |
ad051221 DW |
5138 | ret = domain_pfn_mapping(dmar_domain, iova >> VTD_PAGE_SHIFT, |
5139 | hpa >> VTD_PAGE_SHIFT, size, prot); | |
faa3d6f5 | 5140 | return ret; |
38717946 | 5141 | } |
38717946 | 5142 | |
5009065d | 5143 | static size_t intel_iommu_unmap(struct iommu_domain *domain, |
ea8ea460 | 5144 | unsigned long iova, size_t size) |
38717946 | 5145 | { |
00a77deb | 5146 | struct dmar_domain *dmar_domain = to_dmar_domain(domain); |
ea8ea460 DW |
5147 | struct page *freelist = NULL; |
5148 | struct intel_iommu *iommu; | |
5149 | unsigned long start_pfn, last_pfn; | |
5150 | unsigned int npages; | |
42e8c186 | 5151 | int iommu_id, level = 0; |
5cf0a76f DW |
5152 | |
5153 | /* Cope with horrid API which requires us to unmap more than the | |
5154 | size argument if it happens to be a large-page mapping. */ | |
dc02e46e | 5155 | BUG_ON(!pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT, &level)); |
5cf0a76f DW |
5156 | |
5157 | if (size < VTD_PAGE_SIZE << level_to_offset_bits(level)) | |
5158 | size = VTD_PAGE_SIZE << level_to_offset_bits(level); | |
4b99d352 | 5159 | |
ea8ea460 DW |
5160 | start_pfn = iova >> VTD_PAGE_SHIFT; |
5161 | last_pfn = (iova + size - 1) >> VTD_PAGE_SHIFT; | |
5162 | ||
5163 | freelist = domain_unmap(dmar_domain, start_pfn, last_pfn); | |
5164 | ||
5165 | npages = last_pfn - start_pfn + 1; | |
5166 | ||
29a27719 | 5167 | for_each_domain_iommu(iommu_id, dmar_domain) { |
a1ddcbe9 | 5168 | iommu = g_iommus[iommu_id]; |
ea8ea460 | 5169 | |
42e8c186 JR |
5170 | iommu_flush_iotlb_psi(g_iommus[iommu_id], dmar_domain, |
5171 | start_pfn, npages, !freelist, 0); | |
ea8ea460 DW |
5172 | } |
5173 | ||
5174 | dma_free_pagelist(freelist); | |
fe40f1e0 | 5175 | |
163cc52c DW |
5176 | if (dmar_domain->max_addr == iova + size) |
5177 | dmar_domain->max_addr = iova; | |
b146a1c9 | 5178 | |
5cf0a76f | 5179 | return size; |
38717946 | 5180 | } |
38717946 | 5181 | |
d14d6577 | 5182 | static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, |
bb5547ac | 5183 | dma_addr_t iova) |
38717946 | 5184 | { |
00a77deb | 5185 | struct dmar_domain *dmar_domain = to_dmar_domain(domain); |
38717946 | 5186 | struct dma_pte *pte; |
5cf0a76f | 5187 | int level = 0; |
faa3d6f5 | 5188 | u64 phys = 0; |
38717946 | 5189 | |
5cf0a76f | 5190 | pte = pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT, &level); |
38717946 | 5191 | if (pte) |
faa3d6f5 | 5192 | phys = dma_pte_addr(pte); |
38717946 | 5193 | |
faa3d6f5 | 5194 | return phys; |
38717946 | 5195 | } |
a8bcbb0d | 5196 | |
5d587b8d | 5197 | static bool intel_iommu_capable(enum iommu_cap cap) |
dbb9fd86 | 5198 | { |
dbb9fd86 | 5199 | if (cap == IOMMU_CAP_CACHE_COHERENCY) |
5d587b8d | 5200 | return domain_update_iommu_snooping(NULL) == 1; |
323f99cb | 5201 | if (cap == IOMMU_CAP_INTR_REMAP) |
5d587b8d | 5202 | return irq_remapping_enabled == 1; |
dbb9fd86 | 5203 | |
5d587b8d | 5204 | return false; |
dbb9fd86 SY |
5205 | } |
5206 | ||
abdfdde2 AW |
5207 | static int intel_iommu_add_device(struct device *dev) |
5208 | { | |
a5459cfe | 5209 | struct intel_iommu *iommu; |
abdfdde2 | 5210 | struct iommu_group *group; |
156baca8 | 5211 | u8 bus, devfn; |
70ae6f0d | 5212 | |
a5459cfe AW |
5213 | iommu = device_to_iommu(dev, &bus, &devfn); |
5214 | if (!iommu) | |
70ae6f0d AW |
5215 | return -ENODEV; |
5216 | ||
a5459cfe | 5217 | iommu_device_link(iommu->iommu_dev, dev); |
a4ff1fc2 | 5218 | |
e17f9ff4 | 5219 | group = iommu_group_get_for_dev(dev); |
783f157b | 5220 | |
e17f9ff4 AW |
5221 | if (IS_ERR(group)) |
5222 | return PTR_ERR(group); | |
bcb71abe | 5223 | |
abdfdde2 | 5224 | iommu_group_put(group); |
e17f9ff4 | 5225 | return 0; |
abdfdde2 | 5226 | } |
70ae6f0d | 5227 | |
abdfdde2 AW |
5228 | static void intel_iommu_remove_device(struct device *dev) |
5229 | { | |
a5459cfe AW |
5230 | struct intel_iommu *iommu; |
5231 | u8 bus, devfn; | |
5232 | ||
5233 | iommu = device_to_iommu(dev, &bus, &devfn); | |
5234 | if (!iommu) | |
5235 | return; | |
5236 | ||
abdfdde2 | 5237 | iommu_group_remove_device(dev); |
a5459cfe AW |
5238 | |
5239 | iommu_device_unlink(iommu->iommu_dev, dev); | |
70ae6f0d AW |
5240 | } |
5241 | ||
2f26e0a9 | 5242 | #ifdef CONFIG_INTEL_IOMMU_SVM |
ef41459a JP |
5243 | #define MAX_NR_PASID_BITS (20) |
5244 | static inline unsigned long intel_iommu_get_pts(struct intel_iommu *iommu) | |
5245 | { | |
5246 | /* | |
5247 | * Convert ecap_pss to extend context entry pts encoding, also | |
5248 | * respect the soft pasid_max value set by the iommu. | |
5249 | * - number of PASID bits = ecap_pss + 1 | |
5250 | * - number of PASID table entries = 2^(pts + 5) | |
5251 | * Therefore, pts = ecap_pss - 4 | |
5252 | * e.g. KBL ecap_pss = 0x13, PASID has 20 bits, pts = 15 | |
5253 | */ | |
5254 | if (ecap_pss(iommu->ecap) < 5) | |
5255 | return 0; | |
5256 | ||
5257 | /* pasid_max is encoded as actual number of entries not the bits */ | |
5258 | return find_first_bit((unsigned long *)&iommu->pasid_max, | |
5259 | MAX_NR_PASID_BITS) - 5; | |
5260 | } | |
5261 | ||
2f26e0a9 DW |
5262 | int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev) |
5263 | { | |
5264 | struct device_domain_info *info; | |
5265 | struct context_entry *context; | |
5266 | struct dmar_domain *domain; | |
5267 | unsigned long flags; | |
5268 | u64 ctx_lo; | |
5269 | int ret; | |
5270 | ||
5271 | domain = get_valid_domain_for_dev(sdev->dev); | |
5272 | if (!domain) | |
5273 | return -EINVAL; | |
5274 | ||
5275 | spin_lock_irqsave(&device_domain_lock, flags); | |
5276 | spin_lock(&iommu->lock); | |
5277 | ||
5278 | ret = -EINVAL; | |
5279 | info = sdev->dev->archdata.iommu; | |
5280 | if (!info || !info->pasid_supported) | |
5281 | goto out; | |
5282 | ||
5283 | context = iommu_context_addr(iommu, info->bus, info->devfn, 0); | |
5284 | if (WARN_ON(!context)) | |
5285 | goto out; | |
5286 | ||
5287 | ctx_lo = context[0].lo; | |
5288 | ||
5289 | sdev->did = domain->iommu_did[iommu->seq_id]; | |
5290 | sdev->sid = PCI_DEVID(info->bus, info->devfn); | |
5291 | ||
5292 | if (!(ctx_lo & CONTEXT_PASIDE)) { | |
5293 | context[1].hi = (u64)virt_to_phys(iommu->pasid_state_table); | |
ef41459a JP |
5294 | context[1].lo = (u64)virt_to_phys(iommu->pasid_table) | |
5295 | intel_iommu_get_pts(iommu); | |
5296 | ||
2f26e0a9 DW |
5297 | wmb(); |
5298 | /* CONTEXT_TT_MULTI_LEVEL and CONTEXT_TT_DEV_IOTLB are both | |
5299 | * extended to permit requests-with-PASID if the PASIDE bit | |
5300 | * is set. which makes sense. For CONTEXT_TT_PASS_THROUGH, | |
5301 | * however, the PASIDE bit is ignored and requests-with-PASID | |
5302 | * are unconditionally blocked. Which makes less sense. | |
5303 | * So convert from CONTEXT_TT_PASS_THROUGH to one of the new | |
5304 | * "guest mode" translation types depending on whether ATS | |
5305 | * is available or not. Annoyingly, we can't use the new | |
5306 | * modes *unless* PASIDE is set. */ | |
5307 | if ((ctx_lo & CONTEXT_TT_MASK) == (CONTEXT_TT_PASS_THROUGH << 2)) { | |
5308 | ctx_lo &= ~CONTEXT_TT_MASK; | |
5309 | if (info->ats_supported) | |
5310 | ctx_lo |= CONTEXT_TT_PT_PASID_DEV_IOTLB << 2; | |
5311 | else | |
5312 | ctx_lo |= CONTEXT_TT_PT_PASID << 2; | |
5313 | } | |
5314 | ctx_lo |= CONTEXT_PASIDE; | |
907fea34 DW |
5315 | if (iommu->pasid_state_table) |
5316 | ctx_lo |= CONTEXT_DINVE; | |
a222a7f0 DW |
5317 | if (info->pri_supported) |
5318 | ctx_lo |= CONTEXT_PRS; | |
2f26e0a9 DW |
5319 | context[0].lo = ctx_lo; |
5320 | wmb(); | |
5321 | iommu->flush.flush_context(iommu, sdev->did, sdev->sid, | |
5322 | DMA_CCMD_MASK_NOBIT, | |
5323 | DMA_CCMD_DEVICE_INVL); | |
5324 | } | |
5325 | ||
5326 | /* Enable PASID support in the device, if it wasn't already */ | |
5327 | if (!info->pasid_enabled) | |
5328 | iommu_enable_dev_iotlb(info); | |
5329 | ||
5330 | if (info->ats_enabled) { | |
5331 | sdev->dev_iotlb = 1; | |
5332 | sdev->qdep = info->ats_qdep; | |
5333 | if (sdev->qdep >= QI_DEV_EIOTLB_MAX_INVS) | |
5334 | sdev->qdep = 0; | |
5335 | } | |
5336 | ret = 0; | |
5337 | ||
5338 | out: | |
5339 | spin_unlock(&iommu->lock); | |
5340 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
5341 | ||
5342 | return ret; | |
5343 | } | |
5344 | ||
5345 | struct intel_iommu *intel_svm_device_to_iommu(struct device *dev) | |
5346 | { | |
5347 | struct intel_iommu *iommu; | |
5348 | u8 bus, devfn; | |
5349 | ||
5350 | if (iommu_dummy(dev)) { | |
5351 | dev_warn(dev, | |
5352 | "No IOMMU translation for device; cannot enable SVM\n"); | |
5353 | return NULL; | |
5354 | } | |
5355 | ||
5356 | iommu = device_to_iommu(dev, &bus, &devfn); | |
5357 | if ((!iommu)) { | |
b9997e38 | 5358 | dev_err(dev, "No IOMMU for device; cannot enable SVM\n"); |
2f26e0a9 DW |
5359 | return NULL; |
5360 | } | |
5361 | ||
5362 | if (!iommu->pasid_table) { | |
b9997e38 | 5363 | dev_err(dev, "PASID not enabled on IOMMU; cannot enable SVM\n"); |
2f26e0a9 DW |
5364 | return NULL; |
5365 | } | |
5366 | ||
5367 | return iommu; | |
5368 | } | |
5369 | #endif /* CONFIG_INTEL_IOMMU_SVM */ | |
5370 | ||
b22f6434 | 5371 | static const struct iommu_ops intel_iommu_ops = { |
5d587b8d | 5372 | .capable = intel_iommu_capable, |
00a77deb JR |
5373 | .domain_alloc = intel_iommu_domain_alloc, |
5374 | .domain_free = intel_iommu_domain_free, | |
a8bcbb0d JR |
5375 | .attach_dev = intel_iommu_attach_device, |
5376 | .detach_dev = intel_iommu_detach_device, | |
b146a1c9 JR |
5377 | .map = intel_iommu_map, |
5378 | .unmap = intel_iommu_unmap, | |
315786eb | 5379 | .map_sg = default_iommu_map_sg, |
a8bcbb0d | 5380 | .iova_to_phys = intel_iommu_iova_to_phys, |
abdfdde2 AW |
5381 | .add_device = intel_iommu_add_device, |
5382 | .remove_device = intel_iommu_remove_device, | |
a960fadb | 5383 | .device_group = pci_device_group, |
6d1c56a9 | 5384 | .pgsize_bitmap = INTEL_IOMMU_PGSIZES, |
a8bcbb0d | 5385 | }; |
9af88143 | 5386 | |
9452618e DV |
5387 | static void quirk_iommu_g4x_gfx(struct pci_dev *dev) |
5388 | { | |
5389 | /* G4x/GM45 integrated gfx dmar support is totally busted. */ | |
9f10e5bf | 5390 | pr_info("Disabling IOMMU for graphics on this chipset\n"); |
9452618e DV |
5391 | dmar_map_gfx = 0; |
5392 | } | |
5393 | ||
5394 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_g4x_gfx); | |
5395 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e00, quirk_iommu_g4x_gfx); | |
5396 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e10, quirk_iommu_g4x_gfx); | |
5397 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e20, quirk_iommu_g4x_gfx); | |
5398 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e30, quirk_iommu_g4x_gfx); | |
5399 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e40, quirk_iommu_g4x_gfx); | |
5400 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e90, quirk_iommu_g4x_gfx); | |
5401 | ||
d34d6517 | 5402 | static void quirk_iommu_rwbf(struct pci_dev *dev) |
9af88143 DW |
5403 | { |
5404 | /* | |
5405 | * Mobile 4 Series Chipset neglects to set RWBF capability, | |
210561ff | 5406 | * but needs it. Same seems to hold for the desktop versions. |
9af88143 | 5407 | */ |
9f10e5bf | 5408 | pr_info("Forcing write-buffer flush capability\n"); |
9af88143 DW |
5409 | rwbf_quirk = 1; |
5410 | } | |
5411 | ||
5412 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf); | |
210561ff DV |
5413 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e00, quirk_iommu_rwbf); |
5414 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e10, quirk_iommu_rwbf); | |
5415 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e20, quirk_iommu_rwbf); | |
5416 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e30, quirk_iommu_rwbf); | |
5417 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e40, quirk_iommu_rwbf); | |
5418 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e90, quirk_iommu_rwbf); | |
e0fc7e0b | 5419 | |
eecfd57f AJ |
5420 | #define GGC 0x52 |
5421 | #define GGC_MEMORY_SIZE_MASK (0xf << 8) | |
5422 | #define GGC_MEMORY_SIZE_NONE (0x0 << 8) | |
5423 | #define GGC_MEMORY_SIZE_1M (0x1 << 8) | |
5424 | #define GGC_MEMORY_SIZE_2M (0x3 << 8) | |
5425 | #define GGC_MEMORY_VT_ENABLED (0x8 << 8) | |
5426 | #define GGC_MEMORY_SIZE_2M_VT (0x9 << 8) | |
5427 | #define GGC_MEMORY_SIZE_3M_VT (0xa << 8) | |
5428 | #define GGC_MEMORY_SIZE_4M_VT (0xb << 8) | |
5429 | ||
d34d6517 | 5430 | static void quirk_calpella_no_shadow_gtt(struct pci_dev *dev) |
9eecabcb DW |
5431 | { |
5432 | unsigned short ggc; | |
5433 | ||
eecfd57f | 5434 | if (pci_read_config_word(dev, GGC, &ggc)) |
9eecabcb DW |
5435 | return; |
5436 | ||
eecfd57f | 5437 | if (!(ggc & GGC_MEMORY_VT_ENABLED)) { |
9f10e5bf | 5438 | pr_info("BIOS has allocated no shadow GTT; disabling IOMMU for graphics\n"); |
9eecabcb | 5439 | dmar_map_gfx = 0; |
6fbcfb3e DW |
5440 | } else if (dmar_map_gfx) { |
5441 | /* we have to ensure the gfx device is idle before we flush */ | |
9f10e5bf | 5442 | pr_info("Disabling batched IOTLB flush on Ironlake\n"); |
6fbcfb3e DW |
5443 | intel_iommu_strict = 1; |
5444 | } | |
9eecabcb DW |
5445 | } |
5446 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0040, quirk_calpella_no_shadow_gtt); | |
5447 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0044, quirk_calpella_no_shadow_gtt); | |
5448 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0062, quirk_calpella_no_shadow_gtt); | |
5449 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x006a, quirk_calpella_no_shadow_gtt); | |
5450 | ||
e0fc7e0b DW |
5451 | /* On Tylersburg chipsets, some BIOSes have been known to enable the |
5452 | ISOCH DMAR unit for the Azalia sound device, but not give it any | |
5453 | TLB entries, which causes it to deadlock. Check for that. We do | |
5454 | this in a function called from init_dmars(), instead of in a PCI | |
5455 | quirk, because we don't want to print the obnoxious "BIOS broken" | |
5456 | message if VT-d is actually disabled. | |
5457 | */ | |
5458 | static void __init check_tylersburg_isoch(void) | |
5459 | { | |
5460 | struct pci_dev *pdev; | |
5461 | uint32_t vtisochctrl; | |
5462 | ||
5463 | /* If there's no Azalia in the system anyway, forget it. */ | |
5464 | pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x3a3e, NULL); | |
5465 | if (!pdev) | |
5466 | return; | |
5467 | pci_dev_put(pdev); | |
5468 | ||
5469 | /* System Management Registers. Might be hidden, in which case | |
5470 | we can't do the sanity check. But that's OK, because the | |
5471 | known-broken BIOSes _don't_ actually hide it, so far. */ | |
5472 | pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x342e, NULL); | |
5473 | if (!pdev) | |
5474 | return; | |
5475 | ||
5476 | if (pci_read_config_dword(pdev, 0x188, &vtisochctrl)) { | |
5477 | pci_dev_put(pdev); | |
5478 | return; | |
5479 | } | |
5480 | ||
5481 | pci_dev_put(pdev); | |
5482 | ||
5483 | /* If Azalia DMA is routed to the non-isoch DMAR unit, fine. */ | |
5484 | if (vtisochctrl & 1) | |
5485 | return; | |
5486 | ||
5487 | /* Drop all bits other than the number of TLB entries */ | |
5488 | vtisochctrl &= 0x1c; | |
5489 | ||
5490 | /* If we have the recommended number of TLB entries (16), fine. */ | |
5491 | if (vtisochctrl == 0x10) | |
5492 | return; | |
5493 | ||
5494 | /* Zero TLB entries? You get to ride the short bus to school. */ | |
5495 | if (!vtisochctrl) { | |
5496 | WARN(1, "Your BIOS is broken; DMA routed to ISOCH DMAR unit but no TLB space.\n" | |
5497 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
5498 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
5499 | dmi_get_system_info(DMI_BIOS_VERSION), | |
5500 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
5501 | iommu_identity_mapping |= IDENTMAP_AZALIA; | |
5502 | return; | |
5503 | } | |
9f10e5bf JR |
5504 | |
5505 | pr_warn("Recommended TLB entries for ISOCH unit is 16; your BIOS set %d\n", | |
e0fc7e0b DW |
5506 | vtisochctrl); |
5507 | } |