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Commit | Line | Data |
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f58a9d17 GL |
1 | /* |
2 | * PS3 address space management. | |
3 | * | |
4 | * Copyright (C) 2006 Sony Computer Entertainment Inc. | |
5 | * Copyright 2006 Sony Corp. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; version 2 of the License. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/memory_hotplug.h> | |
d9b2b2a2 | 24 | #include <linux/lmb.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
f58a9d17 | 26 | |
9413c883 | 27 | #include <asm/cell-regs.h> |
e22ba7e3 | 28 | #include <asm/firmware.h> |
d9b2b2a2 | 29 | #include <asm/prom.h> |
f58a9d17 | 30 | #include <asm/udbg.h> |
f58a9d17 GL |
31 | #include <asm/lv1call.h> |
32 | ||
33 | #include "platform.h" | |
34 | ||
35 | #if defined(DEBUG) | |
83bb643d | 36 | #define DBG udbg_printf |
f58a9d17 | 37 | #else |
7424639a | 38 | #define DBG pr_devel |
f58a9d17 GL |
39 | #endif |
40 | ||
41 | enum { | |
f58a9d17 GL |
42 | #if defined(CONFIG_PS3_DYNAMIC_DMA) |
43 | USE_DYNAMIC_DMA = 1, | |
44 | #else | |
45 | USE_DYNAMIC_DMA = 0, | |
46 | #endif | |
47 | }; | |
48 | ||
49 | enum { | |
50 | PAGE_SHIFT_4K = 12U, | |
51 | PAGE_SHIFT_64K = 16U, | |
52 | PAGE_SHIFT_16M = 24U, | |
53 | }; | |
54 | ||
55 | static unsigned long make_page_sizes(unsigned long a, unsigned long b) | |
56 | { | |
57 | return (a << 56) | (b << 48); | |
58 | } | |
59 | ||
60 | enum { | |
61 | ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04, | |
62 | ALLOCATE_MEMORY_ADDR_ZERO = 0X08, | |
63 | }; | |
64 | ||
65 | /* valid htab sizes are {18,19,20} = 256K, 512K, 1M */ | |
66 | ||
67 | enum { | |
68 | HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */ | |
69 | HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */ | |
70 | }; | |
71 | ||
72 | /*============================================================================*/ | |
73 | /* virtual address space routines */ | |
74 | /*============================================================================*/ | |
75 | ||
76 | /** | |
77 | * struct mem_region - memory region structure | |
78 | * @base: base address | |
79 | * @size: size in bytes | |
80 | * @offset: difference between base and rm.size | |
81 | */ | |
82 | ||
83 | struct mem_region { | |
b17b3df1 | 84 | u64 base; |
5418b9c6 | 85 | u64 size; |
f58a9d17 GL |
86 | unsigned long offset; |
87 | }; | |
88 | ||
89 | /** | |
90 | * struct map - address space state variables holder | |
91 | * @total: total memory available as reported by HV | |
92 | * @vas_id - HV virtual address space id | |
93 | * @htab_size: htab size in bytes | |
94 | * | |
95 | * The HV virtual address space (vas) allows for hotplug memory regions. | |
96 | * Memory regions can be created and destroyed in the vas at runtime. | |
97 | * @rm: real mode (bootmem) region | |
98 | * @r1: hotplug memory region(s) | |
99 | * | |
100 | * ps3 addresses | |
101 | * virt_addr: a cpu 'translated' effective address | |
102 | * phys_addr: an address in what Linux thinks is the physical address space | |
103 | * lpar_addr: an address in the HV virtual address space | |
104 | * bus_addr: an io controller 'translated' address on a device bus | |
105 | */ | |
106 | ||
107 | struct map { | |
5418b9c6 | 108 | u64 total; |
b17b3df1 SR |
109 | u64 vas_id; |
110 | u64 htab_size; | |
f58a9d17 GL |
111 | struct mem_region rm; |
112 | struct mem_region r1; | |
113 | }; | |
114 | ||
115 | #define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__) | |
6bb5cf10 GL |
116 | static void __maybe_unused _debug_dump_map(const struct map *m, |
117 | const char *func, int line) | |
f58a9d17 | 118 | { |
5418b9c6 SR |
119 | DBG("%s:%d: map.total = %llxh\n", func, line, m->total); |
120 | DBG("%s:%d: map.rm.size = %llxh\n", func, line, m->rm.size); | |
b17b3df1 SR |
121 | DBG("%s:%d: map.vas_id = %llu\n", func, line, m->vas_id); |
122 | DBG("%s:%d: map.htab_size = %llxh\n", func, line, m->htab_size); | |
123 | DBG("%s:%d: map.r1.base = %llxh\n", func, line, m->r1.base); | |
f58a9d17 | 124 | DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset); |
5418b9c6 | 125 | DBG("%s:%d: map.r1.size = %llxh\n", func, line, m->r1.size); |
f58a9d17 GL |
126 | } |
127 | ||
128 | static struct map map; | |
129 | ||
130 | /** | |
131 | * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address | |
132 | * @phys_addr: linux physical address | |
133 | */ | |
134 | ||
135 | unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr) | |
136 | { | |
137 | BUG_ON(is_kernel_addr(phys_addr)); | |
a628df1e GL |
138 | return (phys_addr < map.rm.size || phys_addr >= map.total) |
139 | ? phys_addr : phys_addr + map.r1.offset; | |
f58a9d17 GL |
140 | } |
141 | ||
142 | EXPORT_SYMBOL(ps3_mm_phys_to_lpar); | |
143 | ||
144 | /** | |
145 | * ps3_mm_vas_create - create the virtual address space | |
146 | */ | |
147 | ||
148 | void __init ps3_mm_vas_create(unsigned long* htab_size) | |
149 | { | |
150 | int result; | |
b17b3df1 SR |
151 | u64 start_address; |
152 | u64 size; | |
153 | u64 access_right; | |
154 | u64 max_page_size; | |
155 | u64 flags; | |
f58a9d17 GL |
156 | |
157 | result = lv1_query_logical_partition_address_region_info(0, | |
158 | &start_address, &size, &access_right, &max_page_size, | |
159 | &flags); | |
160 | ||
161 | if (result) { | |
162 | DBG("%s:%d: lv1_query_logical_partition_address_region_info " | |
163 | "failed: %s\n", __func__, __LINE__, | |
164 | ps3_result(result)); | |
165 | goto fail; | |
166 | } | |
167 | ||
168 | if (max_page_size < PAGE_SHIFT_16M) { | |
b17b3df1 | 169 | DBG("%s:%d: bad max_page_size %llxh\n", __func__, __LINE__, |
f58a9d17 GL |
170 | max_page_size); |
171 | goto fail; | |
172 | } | |
173 | ||
174 | BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX); | |
175 | BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN); | |
176 | ||
177 | result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE, | |
178 | 2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K), | |
179 | &map.vas_id, &map.htab_size); | |
180 | ||
181 | if (result) { | |
182 | DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n", | |
183 | __func__, __LINE__, ps3_result(result)); | |
184 | goto fail; | |
185 | } | |
186 | ||
187 | result = lv1_select_virtual_address_space(map.vas_id); | |
188 | ||
189 | if (result) { | |
190 | DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n", | |
191 | __func__, __LINE__, ps3_result(result)); | |
192 | goto fail; | |
193 | } | |
194 | ||
195 | *htab_size = map.htab_size; | |
196 | ||
197 | debug_dump_map(&map); | |
198 | ||
199 | return; | |
200 | ||
201 | fail: | |
202 | panic("ps3_mm_vas_create failed"); | |
203 | } | |
204 | ||
205 | /** | |
206 | * ps3_mm_vas_destroy - | |
207 | */ | |
208 | ||
209 | void ps3_mm_vas_destroy(void) | |
210 | { | |
6bb5cf10 GL |
211 | int result; |
212 | ||
b17b3df1 | 213 | DBG("%s:%d: map.vas_id = %llu\n", __func__, __LINE__, map.vas_id); |
6bb5cf10 | 214 | |
f58a9d17 | 215 | if (map.vas_id) { |
6bb5cf10 GL |
216 | result = lv1_select_virtual_address_space(0); |
217 | BUG_ON(result); | |
218 | result = lv1_destruct_virtual_address_space(map.vas_id); | |
219 | BUG_ON(result); | |
f58a9d17 GL |
220 | map.vas_id = 0; |
221 | } | |
222 | } | |
223 | ||
224 | /*============================================================================*/ | |
225 | /* memory hotplug routines */ | |
226 | /*============================================================================*/ | |
227 | ||
228 | /** | |
229 | * ps3_mm_region_create - create a memory region in the vas | |
230 | * @r: pointer to a struct mem_region to accept initialized values | |
231 | * @size: requested region size | |
232 | * | |
233 | * This implementation creates the region with the vas large page size. | |
234 | * @size is rounded down to a multiple of the vas large page size. | |
235 | */ | |
236 | ||
32f44a12 | 237 | static int ps3_mm_region_create(struct mem_region *r, unsigned long size) |
f58a9d17 GL |
238 | { |
239 | int result; | |
b17b3df1 | 240 | u64 muid; |
f58a9d17 GL |
241 | |
242 | r->size = _ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M); | |
243 | ||
244 | DBG("%s:%d requested %lxh\n", __func__, __LINE__, size); | |
5418b9c6 SR |
245 | DBG("%s:%d actual %llxh\n", __func__, __LINE__, r->size); |
246 | DBG("%s:%d difference %llxh (%lluMB)\n", __func__, __LINE__, | |
247 | size - r->size, (size - r->size) / 1024 / 1024); | |
f58a9d17 GL |
248 | |
249 | if (r->size == 0) { | |
250 | DBG("%s:%d: size == 0\n", __func__, __LINE__); | |
251 | result = -1; | |
252 | goto zero_region; | |
253 | } | |
254 | ||
255 | result = lv1_allocate_memory(r->size, PAGE_SHIFT_16M, 0, | |
256 | ALLOCATE_MEMORY_TRY_ALT_UNIT, &r->base, &muid); | |
257 | ||
258 | if (result || r->base < map.rm.size) { | |
259 | DBG("%s:%d: lv1_allocate_memory failed: %s\n", | |
260 | __func__, __LINE__, ps3_result(result)); | |
261 | goto zero_region; | |
262 | } | |
263 | ||
264 | r->offset = r->base - map.rm.size; | |
265 | return result; | |
266 | ||
267 | zero_region: | |
268 | r->size = r->base = r->offset = 0; | |
269 | return result; | |
270 | } | |
271 | ||
272 | /** | |
273 | * ps3_mm_region_destroy - destroy a memory region | |
274 | * @r: pointer to struct mem_region | |
275 | */ | |
276 | ||
32f44a12 | 277 | static void ps3_mm_region_destroy(struct mem_region *r) |
f58a9d17 | 278 | { |
6bb5cf10 GL |
279 | int result; |
280 | ||
b17b3df1 | 281 | DBG("%s:%d: r->base = %llxh\n", __func__, __LINE__, r->base); |
f58a9d17 | 282 | if (r->base) { |
6bb5cf10 GL |
283 | result = lv1_release_memory(r->base); |
284 | BUG_ON(result); | |
f58a9d17 GL |
285 | r->size = r->base = r->offset = 0; |
286 | map.total = map.rm.size; | |
287 | } | |
288 | } | |
289 | ||
290 | /** | |
291 | * ps3_mm_add_memory - hot add memory | |
292 | */ | |
293 | ||
294 | static int __init ps3_mm_add_memory(void) | |
295 | { | |
296 | int result; | |
297 | unsigned long start_addr; | |
298 | unsigned long start_pfn; | |
299 | unsigned long nr_pages; | |
300 | ||
e22ba7e3 | 301 | if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) |
ef596c69 | 302 | return -ENODEV; |
e22ba7e3 | 303 | |
f58a9d17 GL |
304 | BUG_ON(!mem_init_done); |
305 | ||
a628df1e | 306 | start_addr = map.rm.size; |
f58a9d17 GL |
307 | start_pfn = start_addr >> PAGE_SHIFT; |
308 | nr_pages = (map.r1.size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
309 | ||
310 | DBG("%s:%d: start_addr %lxh, start_pfn %lxh, nr_pages %lxh\n", | |
311 | __func__, __LINE__, start_addr, start_pfn, nr_pages); | |
312 | ||
313 | result = add_memory(0, start_addr, map.r1.size); | |
314 | ||
315 | if (result) { | |
9146cfc8 | 316 | pr_err("%s:%d: add_memory failed: (%d)\n", |
f58a9d17 GL |
317 | __func__, __LINE__, result); |
318 | return result; | |
319 | } | |
320 | ||
ecc240f9 GL |
321 | lmb_add(start_addr, map.r1.size); |
322 | lmb_analyze(); | |
323 | ||
f58a9d17 GL |
324 | result = online_pages(start_pfn, nr_pages); |
325 | ||
326 | if (result) | |
9146cfc8 | 327 | pr_err("%s:%d: online_pages failed: (%d)\n", |
f58a9d17 GL |
328 | __func__, __LINE__, result); |
329 | ||
330 | return result; | |
331 | } | |
332 | ||
0047656e | 333 | device_initcall(ps3_mm_add_memory); |
f58a9d17 GL |
334 | |
335 | /*============================================================================*/ | |
336 | /* dma routines */ | |
337 | /*============================================================================*/ | |
338 | ||
339 | /** | |
6bb5cf10 | 340 | * dma_sb_lpar_to_bus - Translate an lpar address to ioc mapped bus address. |
f58a9d17 GL |
341 | * @r: pointer to dma region structure |
342 | * @lpar_addr: HV lpar address | |
343 | */ | |
344 | ||
6bb5cf10 | 345 | static unsigned long dma_sb_lpar_to_bus(struct ps3_dma_region *r, |
f58a9d17 GL |
346 | unsigned long lpar_addr) |
347 | { | |
6bb5cf10 GL |
348 | if (lpar_addr >= map.rm.size) |
349 | lpar_addr -= map.r1.offset; | |
350 | BUG_ON(lpar_addr < r->offset); | |
351 | BUG_ON(lpar_addr >= r->offset + r->len); | |
352 | return r->bus_addr + lpar_addr - r->offset; | |
f58a9d17 GL |
353 | } |
354 | ||
355 | #define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__) | |
6bb5cf10 GL |
356 | static void __maybe_unused _dma_dump_region(const struct ps3_dma_region *r, |
357 | const char *func, int line) | |
f58a9d17 | 358 | { |
5c949070 | 359 | DBG("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id, |
6bb5cf10 | 360 | r->dev->dev_id); |
f58a9d17 GL |
361 | DBG("%s:%d: page_size %u\n", func, line, r->page_size); |
362 | DBG("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr); | |
363 | DBG("%s:%d: len %lxh\n", func, line, r->len); | |
6bb5cf10 | 364 | DBG("%s:%d: offset %lxh\n", func, line, r->offset); |
f58a9d17 GL |
365 | } |
366 | ||
6bb5cf10 | 367 | /** |
f58a9d17 GL |
368 | * dma_chunk - A chunk of dma pages mapped by the io controller. |
369 | * @region - The dma region that owns this chunk. | |
370 | * @lpar_addr: Starting lpar address of the area to map. | |
371 | * @bus_addr: Starting ioc bus address of the area to map. | |
372 | * @len: Length in bytes of the area to map. | |
373 | * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the | |
374 | * list of all chuncks owned by the region. | |
375 | * | |
376 | * This implementation uses a very simple dma page manager | |
377 | * based on the dma_chunk structure. This scheme assumes | |
378 | * that all drivers use very well behaved dma ops. | |
379 | */ | |
380 | ||
381 | struct dma_chunk { | |
382 | struct ps3_dma_region *region; | |
383 | unsigned long lpar_addr; | |
384 | unsigned long bus_addr; | |
385 | unsigned long len; | |
386 | struct list_head link; | |
387 | unsigned int usage_count; | |
388 | }; | |
389 | ||
390 | #define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__) | |
391 | static void _dma_dump_chunk (const struct dma_chunk* c, const char* func, | |
392 | int line) | |
393 | { | |
5c949070 | 394 | DBG("%s:%d: r.dev %llu:%llu\n", func, line, |
6bb5cf10 | 395 | c->region->dev->bus_id, c->region->dev->dev_id); |
f58a9d17 GL |
396 | DBG("%s:%d: r.bus_addr %lxh\n", func, line, c->region->bus_addr); |
397 | DBG("%s:%d: r.page_size %u\n", func, line, c->region->page_size); | |
398 | DBG("%s:%d: r.len %lxh\n", func, line, c->region->len); | |
6bb5cf10 | 399 | DBG("%s:%d: r.offset %lxh\n", func, line, c->region->offset); |
f58a9d17 GL |
400 | DBG("%s:%d: c.lpar_addr %lxh\n", func, line, c->lpar_addr); |
401 | DBG("%s:%d: c.bus_addr %lxh\n", func, line, c->bus_addr); | |
402 | DBG("%s:%d: c.len %lxh\n", func, line, c->len); | |
403 | } | |
404 | ||
405 | static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r, | |
406 | unsigned long bus_addr, unsigned long len) | |
407 | { | |
408 | struct dma_chunk *c; | |
409 | unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size); | |
6bb5cf10 GL |
410 | unsigned long aligned_len = _ALIGN_UP(len+bus_addr-aligned_bus, |
411 | 1 << r->page_size); | |
f58a9d17 GL |
412 | |
413 | list_for_each_entry(c, &r->chunk_list.head, link) { | |
414 | /* intersection */ | |
6bb5cf10 GL |
415 | if (aligned_bus >= c->bus_addr && |
416 | aligned_bus + aligned_len <= c->bus_addr + c->len) | |
f58a9d17 | 417 | return c; |
6bb5cf10 | 418 | |
f58a9d17 | 419 | /* below */ |
6bb5cf10 | 420 | if (aligned_bus + aligned_len <= c->bus_addr) |
f58a9d17 | 421 | continue; |
6bb5cf10 | 422 | |
f58a9d17 | 423 | /* above */ |
6bb5cf10 | 424 | if (aligned_bus >= c->bus_addr + c->len) |
f58a9d17 | 425 | continue; |
f58a9d17 GL |
426 | |
427 | /* we don't handle the multi-chunk case for now */ | |
f58a9d17 GL |
428 | dma_dump_chunk(c); |
429 | BUG(); | |
430 | } | |
431 | return NULL; | |
432 | } | |
433 | ||
6bb5cf10 GL |
434 | static struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r, |
435 | unsigned long lpar_addr, unsigned long len) | |
436 | { | |
437 | struct dma_chunk *c; | |
438 | unsigned long aligned_lpar = _ALIGN_DOWN(lpar_addr, 1 << r->page_size); | |
439 | unsigned long aligned_len = _ALIGN_UP(len + lpar_addr - aligned_lpar, | |
440 | 1 << r->page_size); | |
441 | ||
442 | list_for_each_entry(c, &r->chunk_list.head, link) { | |
443 | /* intersection */ | |
444 | if (c->lpar_addr <= aligned_lpar && | |
445 | aligned_lpar < c->lpar_addr + c->len) { | |
446 | if (aligned_lpar + aligned_len <= c->lpar_addr + c->len) | |
447 | return c; | |
448 | else { | |
449 | dma_dump_chunk(c); | |
450 | BUG(); | |
451 | } | |
452 | } | |
453 | /* below */ | |
454 | if (aligned_lpar + aligned_len <= c->lpar_addr) { | |
455 | continue; | |
456 | } | |
457 | /* above */ | |
458 | if (c->lpar_addr + c->len <= aligned_lpar) { | |
459 | continue; | |
460 | } | |
461 | } | |
462 | return NULL; | |
463 | } | |
464 | ||
465 | static int dma_sb_free_chunk(struct dma_chunk *c) | |
f58a9d17 GL |
466 | { |
467 | int result = 0; | |
468 | ||
469 | if (c->bus_addr) { | |
6bb5cf10 GL |
470 | result = lv1_unmap_device_dma_region(c->region->dev->bus_id, |
471 | c->region->dev->dev_id, c->bus_addr, c->len); | |
f58a9d17 GL |
472 | BUG_ON(result); |
473 | } | |
474 | ||
475 | kfree(c); | |
476 | return result; | |
477 | } | |
478 | ||
6bb5cf10 GL |
479 | static int dma_ioc0_free_chunk(struct dma_chunk *c) |
480 | { | |
481 | int result = 0; | |
482 | int iopage; | |
483 | unsigned long offset; | |
484 | struct ps3_dma_region *r = c->region; | |
485 | ||
486 | DBG("%s:start\n", __func__); | |
487 | for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) { | |
488 | offset = (1 << r->page_size) * iopage; | |
489 | /* put INVALID entry */ | |
490 | result = lv1_put_iopte(0, | |
491 | c->bus_addr + offset, | |
492 | c->lpar_addr + offset, | |
493 | r->ioid, | |
494 | 0); | |
495 | DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__, | |
496 | c->bus_addr + offset, | |
497 | c->lpar_addr + offset, | |
498 | r->ioid); | |
499 | ||
500 | if (result) { | |
501 | DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__, | |
502 | __LINE__, ps3_result(result)); | |
503 | } | |
504 | } | |
505 | kfree(c); | |
506 | DBG("%s:end\n", __func__); | |
507 | return result; | |
508 | } | |
509 | ||
f58a9d17 | 510 | /** |
6bb5cf10 | 511 | * dma_sb_map_pages - Maps dma pages into the io controller bus address space. |
f58a9d17 GL |
512 | * @r: Pointer to a struct ps3_dma_region. |
513 | * @phys_addr: Starting physical address of the area to map. | |
514 | * @len: Length in bytes of the area to map. | |
515 | * c_out: A pointer to receive an allocated struct dma_chunk for this area. | |
516 | * | |
517 | * This is the lowest level dma mapping routine, and is the one that will | |
518 | * make the HV call to add the pages into the io controller address space. | |
519 | */ | |
520 | ||
6bb5cf10 GL |
521 | static int dma_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, |
522 | unsigned long len, struct dma_chunk **c_out, u64 iopte_flag) | |
f58a9d17 GL |
523 | { |
524 | int result; | |
525 | struct dma_chunk *c; | |
526 | ||
527 | c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC); | |
528 | ||
529 | if (!c) { | |
530 | result = -ENOMEM; | |
531 | goto fail_alloc; | |
532 | } | |
533 | ||
534 | c->region = r; | |
535 | c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr); | |
6bb5cf10 | 536 | c->bus_addr = dma_sb_lpar_to_bus(r, c->lpar_addr); |
f58a9d17 GL |
537 | c->len = len; |
538 | ||
6bb5cf10 GL |
539 | BUG_ON(iopte_flag != 0xf800000000000000UL); |
540 | result = lv1_map_device_dma_region(c->region->dev->bus_id, | |
541 | c->region->dev->dev_id, c->lpar_addr, | |
542 | c->bus_addr, c->len, iopte_flag); | |
f58a9d17 GL |
543 | if (result) { |
544 | DBG("%s:%d: lv1_map_device_dma_region failed: %s\n", | |
545 | __func__, __LINE__, ps3_result(result)); | |
546 | goto fail_map; | |
547 | } | |
548 | ||
549 | list_add(&c->link, &r->chunk_list.head); | |
550 | ||
551 | *c_out = c; | |
552 | return 0; | |
553 | ||
554 | fail_map: | |
555 | kfree(c); | |
556 | fail_alloc: | |
557 | *c_out = NULL; | |
558 | DBG(" <- %s:%d\n", __func__, __LINE__); | |
559 | return result; | |
560 | } | |
561 | ||
6bb5cf10 GL |
562 | static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, |
563 | unsigned long len, struct dma_chunk **c_out, | |
564 | u64 iopte_flag) | |
565 | { | |
566 | int result; | |
567 | struct dma_chunk *c, *last; | |
568 | int iopage, pages; | |
569 | unsigned long offset; | |
570 | ||
571 | DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__, | |
572 | phys_addr, ps3_mm_phys_to_lpar(phys_addr), len); | |
573 | c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC); | |
574 | ||
575 | if (!c) { | |
576 | result = -ENOMEM; | |
577 | goto fail_alloc; | |
578 | } | |
579 | ||
580 | c->region = r; | |
581 | c->len = len; | |
582 | c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr); | |
583 | /* allocate IO address */ | |
584 | if (list_empty(&r->chunk_list.head)) { | |
585 | /* first one */ | |
586 | c->bus_addr = r->bus_addr; | |
587 | } else { | |
588 | /* derive from last bus addr*/ | |
589 | last = list_entry(r->chunk_list.head.next, | |
590 | struct dma_chunk, link); | |
591 | c->bus_addr = last->bus_addr + last->len; | |
592 | DBG("%s: last bus=%#lx, len=%#lx\n", __func__, | |
593 | last->bus_addr, last->len); | |
594 | } | |
595 | ||
596 | /* FIXME: check whether length exceeds region size */ | |
597 | ||
598 | /* build ioptes for the area */ | |
599 | pages = len >> r->page_size; | |
5c949070 | 600 | DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#llx\n", __func__, |
6bb5cf10 GL |
601 | r->page_size, r->len, pages, iopte_flag); |
602 | for (iopage = 0; iopage < pages; iopage++) { | |
603 | offset = (1 << r->page_size) * iopage; | |
604 | result = lv1_put_iopte(0, | |
605 | c->bus_addr + offset, | |
606 | c->lpar_addr + offset, | |
607 | r->ioid, | |
608 | iopte_flag); | |
609 | if (result) { | |
7e28060a GU |
610 | pr_warning("%s:%d: lv1_put_iopte failed: %s\n", |
611 | __func__, __LINE__, ps3_result(result)); | |
6bb5cf10 GL |
612 | goto fail_map; |
613 | } | |
614 | DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__, | |
615 | iopage, c->bus_addr + offset, c->lpar_addr + offset, | |
616 | r->ioid); | |
617 | } | |
618 | ||
619 | /* be sure that last allocated one is inserted at head */ | |
620 | list_add(&c->link, &r->chunk_list.head); | |
621 | ||
622 | *c_out = c; | |
623 | DBG("%s: end\n", __func__); | |
624 | return 0; | |
625 | ||
626 | fail_map: | |
627 | for (iopage--; 0 <= iopage; iopage--) { | |
628 | lv1_put_iopte(0, | |
629 | c->bus_addr + offset, | |
630 | c->lpar_addr + offset, | |
631 | r->ioid, | |
632 | 0); | |
633 | } | |
634 | kfree(c); | |
635 | fail_alloc: | |
636 | *c_out = NULL; | |
637 | return result; | |
638 | } | |
639 | ||
f58a9d17 | 640 | /** |
6bb5cf10 | 641 | * dma_sb_region_create - Create a device dma region. |
f58a9d17 GL |
642 | * @r: Pointer to a struct ps3_dma_region. |
643 | * | |
644 | * This is the lowest level dma region create routine, and is the one that | |
645 | * will make the HV call to create the region. | |
646 | */ | |
647 | ||
6bb5cf10 | 648 | static int dma_sb_region_create(struct ps3_dma_region *r) |
f58a9d17 GL |
649 | { |
650 | int result; | |
b17b3df1 | 651 | u64 bus_addr; |
f58a9d17 | 652 | |
62d80749 | 653 | DBG(" -> %s:%d:\n", __func__, __LINE__); |
6bb5cf10 GL |
654 | |
655 | BUG_ON(!r); | |
656 | ||
657 | if (!r->dev->bus_id) { | |
5c949070 | 658 | pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__, |
6bb5cf10 GL |
659 | r->dev->bus_id, r->dev->dev_id); |
660 | return 0; | |
661 | } | |
662 | ||
663 | DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__, | |
664 | __LINE__, r->len, r->page_size, r->offset); | |
665 | ||
666 | BUG_ON(!r->len); | |
667 | BUG_ON(!r->page_size); | |
668 | BUG_ON(!r->region_ops); | |
669 | ||
f58a9d17 GL |
670 | INIT_LIST_HEAD(&r->chunk_list.head); |
671 | spin_lock_init(&r->chunk_list.lock); | |
672 | ||
6bb5cf10 GL |
673 | result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id, |
674 | roundup_pow_of_two(r->len), r->page_size, r->region_type, | |
b17b3df1 SR |
675 | &bus_addr); |
676 | r->bus_addr = bus_addr; | |
f58a9d17 GL |
677 | |
678 | if (result) { | |
679 | DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n", | |
680 | __func__, __LINE__, ps3_result(result)); | |
681 | r->len = r->bus_addr = 0; | |
682 | } | |
683 | ||
684 | return result; | |
685 | } | |
686 | ||
6bb5cf10 GL |
687 | static int dma_ioc0_region_create(struct ps3_dma_region *r) |
688 | { | |
689 | int result; | |
b17b3df1 | 690 | u64 bus_addr; |
6bb5cf10 GL |
691 | |
692 | INIT_LIST_HEAD(&r->chunk_list.head); | |
693 | spin_lock_init(&r->chunk_list.lock); | |
694 | ||
695 | result = lv1_allocate_io_segment(0, | |
696 | r->len, | |
697 | r->page_size, | |
b17b3df1 SR |
698 | &bus_addr); |
699 | r->bus_addr = bus_addr; | |
6bb5cf10 GL |
700 | if (result) { |
701 | DBG("%s:%d: lv1_allocate_io_segment failed: %s\n", | |
702 | __func__, __LINE__, ps3_result(result)); | |
703 | r->len = r->bus_addr = 0; | |
704 | } | |
705 | DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__, | |
706 | r->len, r->page_size, r->bus_addr); | |
707 | return result; | |
708 | } | |
709 | ||
f58a9d17 GL |
710 | /** |
711 | * dma_region_free - Free a device dma region. | |
712 | * @r: Pointer to a struct ps3_dma_region. | |
713 | * | |
714 | * This is the lowest level dma region free routine, and is the one that | |
715 | * will make the HV call to free the region. | |
716 | */ | |
717 | ||
6bb5cf10 | 718 | static int dma_sb_region_free(struct ps3_dma_region *r) |
f58a9d17 GL |
719 | { |
720 | int result; | |
721 | struct dma_chunk *c; | |
722 | struct dma_chunk *tmp; | |
723 | ||
6bb5cf10 GL |
724 | BUG_ON(!r); |
725 | ||
726 | if (!r->dev->bus_id) { | |
5c949070 | 727 | pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__, |
6bb5cf10 GL |
728 | r->dev->bus_id, r->dev->dev_id); |
729 | return 0; | |
730 | } | |
731 | ||
f58a9d17 GL |
732 | list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) { |
733 | list_del(&c->link); | |
6bb5cf10 | 734 | dma_sb_free_chunk(c); |
f58a9d17 GL |
735 | } |
736 | ||
6bb5cf10 | 737 | result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id, |
f58a9d17 GL |
738 | r->bus_addr); |
739 | ||
740 | if (result) | |
741 | DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", | |
742 | __func__, __LINE__, ps3_result(result)); | |
743 | ||
6bb5cf10 GL |
744 | r->bus_addr = 0; |
745 | ||
746 | return result; | |
747 | } | |
748 | ||
749 | static int dma_ioc0_region_free(struct ps3_dma_region *r) | |
750 | { | |
751 | int result; | |
752 | struct dma_chunk *c, *n; | |
753 | ||
754 | DBG("%s: start\n", __func__); | |
755 | list_for_each_entry_safe(c, n, &r->chunk_list.head, link) { | |
756 | list_del(&c->link); | |
757 | dma_ioc0_free_chunk(c); | |
758 | } | |
759 | ||
760 | result = lv1_release_io_segment(0, r->bus_addr); | |
761 | ||
762 | if (result) | |
763 | DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", | |
764 | __func__, __LINE__, ps3_result(result)); | |
765 | ||
766 | r->bus_addr = 0; | |
767 | DBG("%s: end\n", __func__); | |
f58a9d17 GL |
768 | |
769 | return result; | |
770 | } | |
771 | ||
772 | /** | |
6bb5cf10 | 773 | * dma_sb_map_area - Map an area of memory into a device dma region. |
f58a9d17 GL |
774 | * @r: Pointer to a struct ps3_dma_region. |
775 | * @virt_addr: Starting virtual address of the area to map. | |
776 | * @len: Length in bytes of the area to map. | |
777 | * @bus_addr: A pointer to return the starting ioc bus address of the area to | |
778 | * map. | |
779 | * | |
780 | * This is the common dma mapping routine. | |
781 | */ | |
782 | ||
6bb5cf10 | 783 | static int dma_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr, |
494fd07a | 784 | unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 | 785 | u64 iopte_flag) |
f58a9d17 GL |
786 | { |
787 | int result; | |
788 | unsigned long flags; | |
789 | struct dma_chunk *c; | |
790 | unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) | |
791 | : virt_addr; | |
6bb5cf10 GL |
792 | unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size); |
793 | unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys, | |
794 | 1 << r->page_size); | |
795 | *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr)); | |
f58a9d17 GL |
796 | |
797 | if (!USE_DYNAMIC_DMA) { | |
798 | unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr); | |
799 | DBG(" -> %s:%d\n", __func__, __LINE__); | |
800 | DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__, | |
801 | virt_addr); | |
802 | DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__, | |
803 | phys_addr); | |
804 | DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__, | |
805 | lpar_addr); | |
806 | DBG("%s:%d len %lxh\n", __func__, __LINE__, len); | |
494fd07a | 807 | DBG("%s:%d bus_addr %llxh (%lxh)\n", __func__, __LINE__, |
f58a9d17 GL |
808 | *bus_addr, len); |
809 | } | |
810 | ||
811 | spin_lock_irqsave(&r->chunk_list.lock, flags); | |
812 | c = dma_find_chunk(r, *bus_addr, len); | |
813 | ||
814 | if (c) { | |
6bb5cf10 GL |
815 | DBG("%s:%d: reusing mapped chunk", __func__, __LINE__); |
816 | dma_dump_chunk(c); | |
f58a9d17 GL |
817 | c->usage_count++; |
818 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
819 | return 0; | |
820 | } | |
821 | ||
6bb5cf10 | 822 | result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag); |
f58a9d17 GL |
823 | |
824 | if (result) { | |
825 | *bus_addr = 0; | |
6bb5cf10 | 826 | DBG("%s:%d: dma_sb_map_pages failed (%d)\n", |
f58a9d17 GL |
827 | __func__, __LINE__, result); |
828 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
829 | return result; | |
830 | } | |
831 | ||
832 | c->usage_count = 1; | |
833 | ||
834 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
835 | return result; | |
836 | } | |
837 | ||
6bb5cf10 | 838 | static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr, |
494fd07a | 839 | unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 GL |
840 | u64 iopte_flag) |
841 | { | |
842 | int result; | |
843 | unsigned long flags; | |
844 | struct dma_chunk *c; | |
845 | unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) | |
846 | : virt_addr; | |
847 | unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size); | |
848 | unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys, | |
849 | 1 << r->page_size); | |
850 | ||
851 | DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__, | |
852 | virt_addr, len); | |
853 | DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__, | |
854 | phys_addr, aligned_phys, aligned_len); | |
855 | ||
856 | spin_lock_irqsave(&r->chunk_list.lock, flags); | |
857 | c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len); | |
858 | ||
859 | if (c) { | |
860 | /* FIXME */ | |
861 | BUG(); | |
862 | *bus_addr = c->bus_addr + phys_addr - aligned_phys; | |
863 | c->usage_count++; | |
864 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
865 | return 0; | |
866 | } | |
867 | ||
868 | result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c, | |
869 | iopte_flag); | |
870 | ||
871 | if (result) { | |
872 | *bus_addr = 0; | |
873 | DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n", | |
874 | __func__, __LINE__, result); | |
875 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
876 | return result; | |
877 | } | |
878 | *bus_addr = c->bus_addr + phys_addr - aligned_phys; | |
494fd07a | 879 | DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#llx\n", __func__, |
6bb5cf10 GL |
880 | virt_addr, phys_addr, aligned_phys, *bus_addr); |
881 | c->usage_count = 1; | |
882 | ||
883 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
884 | return result; | |
885 | } | |
886 | ||
f58a9d17 | 887 | /** |
6bb5cf10 | 888 | * dma_sb_unmap_area - Unmap an area of memory from a device dma region. |
f58a9d17 GL |
889 | * @r: Pointer to a struct ps3_dma_region. |
890 | * @bus_addr: The starting ioc bus address of the area to unmap. | |
891 | * @len: Length in bytes of the area to unmap. | |
892 | * | |
893 | * This is the common dma unmap routine. | |
894 | */ | |
895 | ||
494fd07a | 896 | static int dma_sb_unmap_area(struct ps3_dma_region *r, dma_addr_t bus_addr, |
f58a9d17 GL |
897 | unsigned long len) |
898 | { | |
899 | unsigned long flags; | |
900 | struct dma_chunk *c; | |
901 | ||
902 | spin_lock_irqsave(&r->chunk_list.lock, flags); | |
903 | c = dma_find_chunk(r, bus_addr, len); | |
904 | ||
905 | if (!c) { | |
906 | unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, | |
907 | 1 << r->page_size); | |
6bb5cf10 GL |
908 | unsigned long aligned_len = _ALIGN_UP(len + bus_addr |
909 | - aligned_bus, 1 << r->page_size); | |
494fd07a | 910 | DBG("%s:%d: not found: bus_addr %llxh\n", |
f58a9d17 GL |
911 | __func__, __LINE__, bus_addr); |
912 | DBG("%s:%d: not found: len %lxh\n", | |
913 | __func__, __LINE__, len); | |
914 | DBG("%s:%d: not found: aligned_bus %lxh\n", | |
915 | __func__, __LINE__, aligned_bus); | |
916 | DBG("%s:%d: not found: aligned_len %lxh\n", | |
917 | __func__, __LINE__, aligned_len); | |
918 | BUG(); | |
919 | } | |
920 | ||
921 | c->usage_count--; | |
922 | ||
923 | if (!c->usage_count) { | |
924 | list_del(&c->link); | |
6bb5cf10 | 925 | dma_sb_free_chunk(c); |
f58a9d17 GL |
926 | } |
927 | ||
928 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
929 | return 0; | |
930 | } | |
931 | ||
32f44a12 | 932 | static int dma_ioc0_unmap_area(struct ps3_dma_region *r, |
494fd07a | 933 | dma_addr_t bus_addr, unsigned long len) |
6bb5cf10 GL |
934 | { |
935 | unsigned long flags; | |
936 | struct dma_chunk *c; | |
937 | ||
494fd07a | 938 | DBG("%s: start a=%#llx l=%#lx\n", __func__, bus_addr, len); |
6bb5cf10 GL |
939 | spin_lock_irqsave(&r->chunk_list.lock, flags); |
940 | c = dma_find_chunk(r, bus_addr, len); | |
941 | ||
942 | if (!c) { | |
943 | unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, | |
944 | 1 << r->page_size); | |
945 | unsigned long aligned_len = _ALIGN_UP(len + bus_addr | |
946 | - aligned_bus, | |
947 | 1 << r->page_size); | |
494fd07a | 948 | DBG("%s:%d: not found: bus_addr %llxh\n", |
6bb5cf10 GL |
949 | __func__, __LINE__, bus_addr); |
950 | DBG("%s:%d: not found: len %lxh\n", | |
951 | __func__, __LINE__, len); | |
952 | DBG("%s:%d: not found: aligned_bus %lxh\n", | |
953 | __func__, __LINE__, aligned_bus); | |
954 | DBG("%s:%d: not found: aligned_len %lxh\n", | |
955 | __func__, __LINE__, aligned_len); | |
956 | BUG(); | |
957 | } | |
958 | ||
959 | c->usage_count--; | |
960 | ||
961 | if (!c->usage_count) { | |
962 | list_del(&c->link); | |
963 | dma_ioc0_free_chunk(c); | |
964 | } | |
965 | ||
966 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
967 | DBG("%s: end\n", __func__); | |
968 | return 0; | |
969 | } | |
970 | ||
f58a9d17 | 971 | /** |
6bb5cf10 | 972 | * dma_sb_region_create_linear - Setup a linear dma mapping for a device. |
f58a9d17 GL |
973 | * @r: Pointer to a struct ps3_dma_region. |
974 | * | |
975 | * This routine creates an HV dma region for the device and maps all available | |
976 | * ram into the io controller bus address space. | |
977 | */ | |
978 | ||
6bb5cf10 | 979 | static int dma_sb_region_create_linear(struct ps3_dma_region *r) |
f58a9d17 GL |
980 | { |
981 | int result; | |
494fd07a SR |
982 | unsigned long virt_addr, len; |
983 | dma_addr_t tmp; | |
6bb5cf10 GL |
984 | |
985 | if (r->len > 16*1024*1024) { /* FIXME: need proper fix */ | |
986 | /* force 16M dma pages for linear mapping */ | |
987 | if (r->page_size != PS3_DMA_16M) { | |
988 | pr_info("%s:%d: forcing 16M pages for linear map\n", | |
989 | __func__, __LINE__); | |
990 | r->page_size = PS3_DMA_16M; | |
991 | r->len = _ALIGN_UP(r->len, 1 << r->page_size); | |
992 | } | |
f58a9d17 GL |
993 | } |
994 | ||
6bb5cf10 | 995 | result = dma_sb_region_create(r); |
f58a9d17 GL |
996 | BUG_ON(result); |
997 | ||
6bb5cf10 GL |
998 | if (r->offset < map.rm.size) { |
999 | /* Map (part of) 1st RAM chunk */ | |
1000 | virt_addr = map.rm.base + r->offset; | |
1001 | len = map.rm.size - r->offset; | |
1002 | if (len > r->len) | |
1003 | len = r->len; | |
1004 | result = dma_sb_map_area(r, virt_addr, len, &tmp, | |
5c6fc8db GU |
1005 | CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW | |
1006 | CBE_IOPTE_M); | |
6bb5cf10 GL |
1007 | BUG_ON(result); |
1008 | } | |
f58a9d17 | 1009 | |
6bb5cf10 GL |
1010 | if (r->offset + r->len > map.rm.size) { |
1011 | /* Map (part of) 2nd RAM chunk */ | |
a628df1e | 1012 | virt_addr = map.rm.size; |
6bb5cf10 GL |
1013 | len = r->len; |
1014 | if (r->offset >= map.rm.size) | |
1015 | virt_addr += r->offset - map.rm.size; | |
1016 | else | |
1017 | len -= map.rm.size - r->offset; | |
1018 | result = dma_sb_map_area(r, virt_addr, len, &tmp, | |
5c6fc8db GU |
1019 | CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW | |
1020 | CBE_IOPTE_M); | |
6bb5cf10 GL |
1021 | BUG_ON(result); |
1022 | } | |
f58a9d17 GL |
1023 | |
1024 | return result; | |
1025 | } | |
1026 | ||
1027 | /** | |
6bb5cf10 | 1028 | * dma_sb_region_free_linear - Free a linear dma mapping for a device. |
f58a9d17 GL |
1029 | * @r: Pointer to a struct ps3_dma_region. |
1030 | * | |
1031 | * This routine will unmap all mapped areas and free the HV dma region. | |
1032 | */ | |
1033 | ||
6bb5cf10 | 1034 | static int dma_sb_region_free_linear(struct ps3_dma_region *r) |
f58a9d17 GL |
1035 | { |
1036 | int result; | |
494fd07a SR |
1037 | dma_addr_t bus_addr; |
1038 | unsigned long len, lpar_addr; | |
6bb5cf10 GL |
1039 | |
1040 | if (r->offset < map.rm.size) { | |
1041 | /* Unmap (part of) 1st RAM chunk */ | |
1042 | lpar_addr = map.rm.base + r->offset; | |
1043 | len = map.rm.size - r->offset; | |
1044 | if (len > r->len) | |
1045 | len = r->len; | |
1046 | bus_addr = dma_sb_lpar_to_bus(r, lpar_addr); | |
1047 | result = dma_sb_unmap_area(r, bus_addr, len); | |
1048 | BUG_ON(result); | |
1049 | } | |
f58a9d17 | 1050 | |
6bb5cf10 GL |
1051 | if (r->offset + r->len > map.rm.size) { |
1052 | /* Unmap (part of) 2nd RAM chunk */ | |
1053 | lpar_addr = map.r1.base; | |
1054 | len = r->len; | |
1055 | if (r->offset >= map.rm.size) | |
1056 | lpar_addr += r->offset - map.rm.size; | |
1057 | else | |
1058 | len -= map.rm.size - r->offset; | |
1059 | bus_addr = dma_sb_lpar_to_bus(r, lpar_addr); | |
1060 | result = dma_sb_unmap_area(r, bus_addr, len); | |
1061 | BUG_ON(result); | |
1062 | } | |
f58a9d17 | 1063 | |
6bb5cf10 | 1064 | result = dma_sb_region_free(r); |
f58a9d17 GL |
1065 | BUG_ON(result); |
1066 | ||
1067 | return result; | |
1068 | } | |
1069 | ||
1070 | /** | |
6bb5cf10 | 1071 | * dma_sb_map_area_linear - Map an area of memory into a device dma region. |
f58a9d17 GL |
1072 | * @r: Pointer to a struct ps3_dma_region. |
1073 | * @virt_addr: Starting virtual address of the area to map. | |
1074 | * @len: Length in bytes of the area to map. | |
1075 | * @bus_addr: A pointer to return the starting ioc bus address of the area to | |
1076 | * map. | |
1077 | * | |
6bb5cf10 | 1078 | * This routine just returns the corresponding bus address. Actual mapping |
f58a9d17 GL |
1079 | * occurs in dma_region_create_linear(). |
1080 | */ | |
1081 | ||
6bb5cf10 | 1082 | static int dma_sb_map_area_linear(struct ps3_dma_region *r, |
494fd07a | 1083 | unsigned long virt_addr, unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 | 1084 | u64 iopte_flag) |
f58a9d17 GL |
1085 | { |
1086 | unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) | |
1087 | : virt_addr; | |
6bb5cf10 | 1088 | *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr)); |
f58a9d17 GL |
1089 | return 0; |
1090 | } | |
1091 | ||
1092 | /** | |
1093 | * dma_unmap_area_linear - Unmap an area of memory from a device dma region. | |
1094 | * @r: Pointer to a struct ps3_dma_region. | |
1095 | * @bus_addr: The starting ioc bus address of the area to unmap. | |
1096 | * @len: Length in bytes of the area to unmap. | |
1097 | * | |
6bb5cf10 | 1098 | * This routine does nothing. Unmapping occurs in dma_sb_region_free_linear(). |
f58a9d17 GL |
1099 | */ |
1100 | ||
6bb5cf10 | 1101 | static int dma_sb_unmap_area_linear(struct ps3_dma_region *r, |
494fd07a | 1102 | dma_addr_t bus_addr, unsigned long len) |
f58a9d17 GL |
1103 | { |
1104 | return 0; | |
6bb5cf10 GL |
1105 | }; |
1106 | ||
1107 | static const struct ps3_dma_region_ops ps3_dma_sb_region_ops = { | |
1108 | .create = dma_sb_region_create, | |
1109 | .free = dma_sb_region_free, | |
1110 | .map = dma_sb_map_area, | |
1111 | .unmap = dma_sb_unmap_area | |
1112 | }; | |
1113 | ||
1114 | static const struct ps3_dma_region_ops ps3_dma_sb_region_linear_ops = { | |
1115 | .create = dma_sb_region_create_linear, | |
1116 | .free = dma_sb_region_free_linear, | |
1117 | .map = dma_sb_map_area_linear, | |
1118 | .unmap = dma_sb_unmap_area_linear | |
1119 | }; | |
1120 | ||
1121 | static const struct ps3_dma_region_ops ps3_dma_ioc0_region_ops = { | |
1122 | .create = dma_ioc0_region_create, | |
1123 | .free = dma_ioc0_region_free, | |
1124 | .map = dma_ioc0_map_area, | |
1125 | .unmap = dma_ioc0_unmap_area | |
1126 | }; | |
1127 | ||
1128 | int ps3_dma_region_init(struct ps3_system_bus_device *dev, | |
1129 | struct ps3_dma_region *r, enum ps3_dma_page_size page_size, | |
1130 | enum ps3_dma_region_type region_type, void *addr, unsigned long len) | |
1131 | { | |
1132 | unsigned long lpar_addr; | |
1133 | ||
1134 | lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0; | |
1135 | ||
1136 | r->dev = dev; | |
1137 | r->page_size = page_size; | |
1138 | r->region_type = region_type; | |
1139 | r->offset = lpar_addr; | |
1140 | if (r->offset >= map.rm.size) | |
1141 | r->offset -= map.r1.offset; | |
1142 | r->len = len ? len : _ALIGN_UP(map.total, 1 << r->page_size); | |
1143 | ||
1144 | switch (dev->dev_type) { | |
1145 | case PS3_DEVICE_TYPE_SB: | |
1146 | r->region_ops = (USE_DYNAMIC_DMA) | |
1147 | ? &ps3_dma_sb_region_ops | |
1148 | : &ps3_dma_sb_region_linear_ops; | |
1149 | break; | |
1150 | case PS3_DEVICE_TYPE_IOC0: | |
1151 | r->region_ops = &ps3_dma_ioc0_region_ops; | |
1152 | break; | |
1153 | default: | |
1154 | BUG(); | |
1155 | return -EINVAL; | |
1156 | } | |
1157 | return 0; | |
f58a9d17 | 1158 | } |
6bb5cf10 | 1159 | EXPORT_SYMBOL(ps3_dma_region_init); |
f58a9d17 GL |
1160 | |
1161 | int ps3_dma_region_create(struct ps3_dma_region *r) | |
1162 | { | |
6bb5cf10 GL |
1163 | BUG_ON(!r); |
1164 | BUG_ON(!r->region_ops); | |
1165 | BUG_ON(!r->region_ops->create); | |
1166 | return r->region_ops->create(r); | |
f58a9d17 | 1167 | } |
6bb5cf10 | 1168 | EXPORT_SYMBOL(ps3_dma_region_create); |
f58a9d17 GL |
1169 | |
1170 | int ps3_dma_region_free(struct ps3_dma_region *r) | |
1171 | { | |
6bb5cf10 GL |
1172 | BUG_ON(!r); |
1173 | BUG_ON(!r->region_ops); | |
1174 | BUG_ON(!r->region_ops->free); | |
1175 | return r->region_ops->free(r); | |
f58a9d17 | 1176 | } |
6bb5cf10 | 1177 | EXPORT_SYMBOL(ps3_dma_region_free); |
f58a9d17 GL |
1178 | |
1179 | int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr, | |
494fd07a | 1180 | unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 | 1181 | u64 iopte_flag) |
f58a9d17 | 1182 | { |
6bb5cf10 | 1183 | return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag); |
f58a9d17 GL |
1184 | } |
1185 | ||
494fd07a | 1186 | int ps3_dma_unmap(struct ps3_dma_region *r, dma_addr_t bus_addr, |
f58a9d17 GL |
1187 | unsigned long len) |
1188 | { | |
6bb5cf10 | 1189 | return r->region_ops->unmap(r, bus_addr, len); |
f58a9d17 GL |
1190 | } |
1191 | ||
1192 | /*============================================================================*/ | |
1193 | /* system startup routines */ | |
1194 | /*============================================================================*/ | |
1195 | ||
1196 | /** | |
1197 | * ps3_mm_init - initialize the address space state variables | |
1198 | */ | |
1199 | ||
1200 | void __init ps3_mm_init(void) | |
1201 | { | |
1202 | int result; | |
1203 | ||
1204 | DBG(" -> %s:%d\n", __func__, __LINE__); | |
1205 | ||
1206 | result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size, | |
1207 | &map.total); | |
1208 | ||
1209 | if (result) | |
1210 | panic("ps3_repository_read_mm_info() failed"); | |
1211 | ||
1212 | map.rm.offset = map.rm.base; | |
1213 | map.vas_id = map.htab_size = 0; | |
1214 | ||
1215 | /* this implementation assumes map.rm.base is zero */ | |
1216 | ||
1217 | BUG_ON(map.rm.base); | |
1218 | BUG_ON(!map.rm.size); | |
1219 | ||
f58a9d17 GL |
1220 | |
1221 | /* arrange to do this in ps3_mm_add_memory */ | |
1222 | ps3_mm_region_create(&map.r1, map.total - map.rm.size); | |
1223 | ||
6bb5cf10 GL |
1224 | /* correct map.total for the real total amount of memory we use */ |
1225 | map.total = map.rm.size + map.r1.size; | |
1226 | ||
f58a9d17 GL |
1227 | DBG(" <- %s:%d\n", __func__, __LINE__); |
1228 | } | |
1229 | ||
1230 | /** | |
1231 | * ps3_mm_shutdown - final cleanup of address space | |
1232 | */ | |
1233 | ||
1234 | void ps3_mm_shutdown(void) | |
1235 | { | |
1236 | ps3_mm_region_destroy(&map.r1); | |
f58a9d17 | 1237 | } |