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203e2de3 | 1 | // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) |
780b6263 RP |
2 | /* |
3 | * Copyright 2014-2016 Freescale Semiconductor Inc. | |
9d988097 | 4 | * Copyright 2016-2019 NXP |
780b6263 | 5 | * |
780b6263 RP |
6 | */ |
7 | #include <linux/types.h> | |
6bd067c4 | 8 | #include <linux/fsl/mc.h> |
c89105c9 | 9 | #include <soc/fsl/dpaa2-io.h> |
780b6263 RP |
10 | #include <linux/init.h> |
11 | #include <linux/module.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/dma-mapping.h> | |
15 | #include <linux/slab.h> | |
16 | ||
17 | #include "dpio.h" | |
18 | #include "qbman-portal.h" | |
19 | ||
20 | struct dpaa2_io { | |
780b6263 RP |
21 | struct dpaa2_io_desc dpio_desc; |
22 | struct qbman_swp_desc swp_desc; | |
23 | struct qbman_swp *swp; | |
24 | struct list_head node; | |
25 | /* protect against multiple management commands */ | |
26 | spinlock_t lock_mgmt_cmd; | |
27 | /* protect notifications list */ | |
28 | spinlock_t lock_notifications; | |
29 | struct list_head notifications; | |
cf9ff75d | 30 | struct device *dev; |
780b6263 RP |
31 | }; |
32 | ||
33 | struct dpaa2_io_store { | |
34 | unsigned int max; | |
35 | dma_addr_t paddr; | |
36 | struct dpaa2_dq *vaddr; | |
37 | void *alloced_addr; /* unaligned value from kmalloc() */ | |
38 | unsigned int idx; /* position of the next-to-be-returned entry */ | |
39 | struct qbman_swp *swp; /* portal used to issue VDQCR */ | |
40 | struct device *dev; /* device used for DMA mapping */ | |
41 | }; | |
42 | ||
43 | /* keep a per cpu array of DPIOs for fast access */ | |
44 | static struct dpaa2_io *dpio_by_cpu[NR_CPUS]; | |
45 | static struct list_head dpio_list = LIST_HEAD_INIT(dpio_list); | |
46 | static DEFINE_SPINLOCK(dpio_list_lock); | |
47 | ||
48 | static inline struct dpaa2_io *service_select_by_cpu(struct dpaa2_io *d, | |
49 | int cpu) | |
50 | { | |
51 | if (d) | |
52 | return d; | |
53 | ||
8dabf52f | 54 | if (cpu != DPAA2_IO_ANY_CPU && cpu >= num_possible_cpus()) |
780b6263 RP |
55 | return NULL; |
56 | ||
57 | /* | |
58 | * If cpu == -1, choose the current cpu, with no guarantees about | |
59 | * potentially being migrated away. | |
60 | */ | |
61 | if (unlikely(cpu < 0)) | |
62 | cpu = smp_processor_id(); | |
63 | ||
64 | /* If a specific cpu was requested, pick it up immediately */ | |
65 | return dpio_by_cpu[cpu]; | |
66 | } | |
67 | ||
68 | static inline struct dpaa2_io *service_select(struct dpaa2_io *d) | |
69 | { | |
70 | if (d) | |
71 | return d; | |
72 | ||
73 | spin_lock(&dpio_list_lock); | |
74 | d = list_entry(dpio_list.next, struct dpaa2_io, node); | |
75 | list_del(&d->node); | |
76 | list_add_tail(&d->node, &dpio_list); | |
77 | spin_unlock(&dpio_list_lock); | |
78 | ||
79 | return d; | |
80 | } | |
81 | ||
1f495383 IR |
82 | /** |
83 | * dpaa2_io_service_select() - return a dpaa2_io service affined to this cpu | |
84 | * @cpu: the cpu id | |
85 | * | |
86 | * Return the affine dpaa2_io service, or NULL if there is no service affined | |
87 | * to the specified cpu. If DPAA2_IO_ANY_CPU is used, return the next available | |
88 | * service. | |
89 | */ | |
90 | struct dpaa2_io *dpaa2_io_service_select(int cpu) | |
91 | { | |
92 | if (cpu == DPAA2_IO_ANY_CPU) | |
93 | return service_select(NULL); | |
94 | ||
95 | return service_select_by_cpu(NULL, cpu); | |
96 | } | |
97 | EXPORT_SYMBOL_GPL(dpaa2_io_service_select); | |
98 | ||
780b6263 RP |
99 | /** |
100 | * dpaa2_io_create() - create a dpaa2_io object. | |
101 | * @desc: the dpaa2_io descriptor | |
cf9ff75d | 102 | * @dev: the actual DPIO device |
780b6263 RP |
103 | * |
104 | * Activates a "struct dpaa2_io" corresponding to the given config of an actual | |
105 | * DPIO object. | |
106 | * | |
107 | * Return a valid dpaa2_io object for success, or NULL for failure. | |
108 | */ | |
cf9ff75d IC |
109 | struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc, |
110 | struct device *dev) | |
780b6263 RP |
111 | { |
112 | struct dpaa2_io *obj = kmalloc(sizeof(*obj), GFP_KERNEL); | |
113 | ||
114 | if (!obj) | |
115 | return NULL; | |
116 | ||
117 | /* check if CPU is out of range (-1 means any cpu) */ | |
8dabf52f | 118 | if (desc->cpu != DPAA2_IO_ANY_CPU && desc->cpu >= num_possible_cpus()) { |
780b6263 RP |
119 | kfree(obj); |
120 | return NULL; | |
121 | } | |
122 | ||
780b6263 RP |
123 | obj->dpio_desc = *desc; |
124 | obj->swp_desc.cena_bar = obj->dpio_desc.regs_cena; | |
125 | obj->swp_desc.cinh_bar = obj->dpio_desc.regs_cinh; | |
126 | obj->swp_desc.qman_version = obj->dpio_desc.qman_version; | |
127 | obj->swp = qbman_swp_init(&obj->swp_desc); | |
128 | ||
129 | if (!obj->swp) { | |
130 | kfree(obj); | |
131 | return NULL; | |
132 | } | |
133 | ||
134 | INIT_LIST_HEAD(&obj->node); | |
135 | spin_lock_init(&obj->lock_mgmt_cmd); | |
136 | spin_lock_init(&obj->lock_notifications); | |
137 | INIT_LIST_HEAD(&obj->notifications); | |
138 | ||
139 | /* For now only enable DQRR interrupts */ | |
140 | qbman_swp_interrupt_set_trigger(obj->swp, | |
141 | QBMAN_SWP_INTERRUPT_DQRI); | |
142 | qbman_swp_interrupt_clear_status(obj->swp, 0xffffffff); | |
143 | if (obj->dpio_desc.receives_notifications) | |
144 | qbman_swp_push_set(obj->swp, 0, 1); | |
145 | ||
146 | spin_lock(&dpio_list_lock); | |
147 | list_add_tail(&obj->node, &dpio_list); | |
148 | if (desc->cpu >= 0 && !dpio_by_cpu[desc->cpu]) | |
149 | dpio_by_cpu[desc->cpu] = obj; | |
150 | spin_unlock(&dpio_list_lock); | |
151 | ||
cf9ff75d IC |
152 | obj->dev = dev; |
153 | ||
780b6263 RP |
154 | return obj; |
155 | } | |
780b6263 RP |
156 | |
157 | /** | |
158 | * dpaa2_io_down() - release the dpaa2_io object. | |
159 | * @d: the dpaa2_io object to be released. | |
160 | * | |
161 | * The "struct dpaa2_io" type can represent an individual DPIO object (as | |
162 | * described by "struct dpaa2_io_desc") or an instance of a "DPIO service", | |
163 | * which can be used to group/encapsulate multiple DPIO objects. In all cases, | |
164 | * each handle obtained should be released using this function. | |
165 | */ | |
166 | void dpaa2_io_down(struct dpaa2_io *d) | |
167 | { | |
e181a569 IC |
168 | spin_lock(&dpio_list_lock); |
169 | dpio_by_cpu[d->dpio_desc.cpu] = NULL; | |
170 | list_del(&d->node); | |
171 | spin_unlock(&dpio_list_lock); | |
172 | ||
780b6263 RP |
173 | kfree(d); |
174 | } | |
780b6263 RP |
175 | |
176 | #define DPAA_POLL_MAX 32 | |
177 | ||
178 | /** | |
179 | * dpaa2_io_irq() - ISR for DPIO interrupts | |
180 | * | |
181 | * @obj: the given DPIO object. | |
182 | * | |
183 | * Return IRQ_HANDLED for success or IRQ_NONE if there | |
184 | * were no pending interrupts. | |
185 | */ | |
186 | irqreturn_t dpaa2_io_irq(struct dpaa2_io *obj) | |
187 | { | |
188 | const struct dpaa2_dq *dq; | |
189 | int max = 0; | |
190 | struct qbman_swp *swp; | |
191 | u32 status; | |
192 | ||
193 | swp = obj->swp; | |
194 | status = qbman_swp_interrupt_read_status(swp); | |
195 | if (!status) | |
196 | return IRQ_NONE; | |
197 | ||
198 | dq = qbman_swp_dqrr_next(swp); | |
199 | while (dq) { | |
200 | if (qbman_result_is_SCN(dq)) { | |
201 | struct dpaa2_io_notification_ctx *ctx; | |
202 | u64 q64; | |
203 | ||
204 | q64 = qbman_result_SCN_ctx(dq); | |
a4c4f360 | 205 | ctx = (void *)(uintptr_t)q64; |
780b6263 RP |
206 | ctx->cb(ctx); |
207 | } else { | |
208 | pr_crit("fsl-mc-dpio: Unrecognised/ignored DQRR entry\n"); | |
209 | } | |
210 | qbman_swp_dqrr_consume(swp, dq); | |
211 | ++max; | |
212 | if (max > DPAA_POLL_MAX) | |
213 | goto done; | |
214 | dq = qbman_swp_dqrr_next(swp); | |
215 | } | |
216 | done: | |
217 | qbman_swp_interrupt_clear_status(swp, status); | |
218 | qbman_swp_interrupt_set_inhibit(swp, 0); | |
219 | return IRQ_HANDLED; | |
220 | } | |
780b6263 | 221 | |
991e8732 IC |
222 | /** |
223 | * dpaa2_io_get_cpu() - get the cpu associated with a given DPIO object | |
224 | * | |
225 | * @d: the given DPIO object. | |
226 | * | |
227 | * Return the cpu associated with the DPIO object | |
228 | */ | |
229 | int dpaa2_io_get_cpu(struct dpaa2_io *d) | |
230 | { | |
231 | return d->dpio_desc.cpu; | |
232 | } | |
233 | EXPORT_SYMBOL(dpaa2_io_get_cpu); | |
234 | ||
780b6263 RP |
235 | /** |
236 | * dpaa2_io_service_register() - Prepare for servicing of FQDAN or CDAN | |
237 | * notifications on the given DPIO service. | |
238 | * @d: the given DPIO service. | |
239 | * @ctx: the notification context. | |
47441f7f | 240 | * @dev: the device that requests the register |
780b6263 RP |
241 | * |
242 | * The caller should make the MC command to attach a DPAA2 object to | |
243 | * a DPIO after this function completes successfully. In that way: | |
244 | * (a) The DPIO service is "ready" to handle a notification arrival | |
245 | * (which might happen before the "attach" command to MC has | |
246 | * returned control of execution back to the caller) | |
247 | * (b) The DPIO service can provide back to the caller the 'dpio_id' and | |
248 | * 'qman64' parameters that it should pass along in the MC command | |
249 | * in order for the object to be configured to produce the right | |
250 | * notification fields to the DPIO service. | |
251 | * | |
252 | * Return 0 for success, or -ENODEV for failure. | |
253 | */ | |
254 | int dpaa2_io_service_register(struct dpaa2_io *d, | |
47441f7f IC |
255 | struct dpaa2_io_notification_ctx *ctx, |
256 | struct device *dev) | |
780b6263 | 257 | { |
47441f7f | 258 | struct device_link *link; |
780b6263 RP |
259 | unsigned long irqflags; |
260 | ||
261 | d = service_select_by_cpu(d, ctx->desired_cpu); | |
262 | if (!d) | |
263 | return -ENODEV; | |
264 | ||
47441f7f IC |
265 | link = device_link_add(dev, d->dev, DL_FLAG_AUTOREMOVE_CONSUMER); |
266 | if (!link) | |
267 | return -EINVAL; | |
268 | ||
780b6263 | 269 | ctx->dpio_id = d->dpio_desc.dpio_id; |
a4c4f360 | 270 | ctx->qman64 = (u64)(uintptr_t)ctx; |
780b6263 RP |
271 | ctx->dpio_private = d; |
272 | spin_lock_irqsave(&d->lock_notifications, irqflags); | |
273 | list_add(&ctx->node, &d->notifications); | |
274 | spin_unlock_irqrestore(&d->lock_notifications, irqflags); | |
275 | ||
276 | /* Enable the generation of CDAN notifications */ | |
277 | if (ctx->is_cdan) | |
30c9dbf3 IR |
278 | return qbman_swp_CDAN_set_context_enable(d->swp, |
279 | (u16)ctx->id, | |
280 | ctx->qman64); | |
780b6263 RP |
281 | return 0; |
282 | } | |
53639c64 | 283 | EXPORT_SYMBOL_GPL(dpaa2_io_service_register); |
780b6263 RP |
284 | |
285 | /** | |
286 | * dpaa2_io_service_deregister - The opposite of 'register'. | |
287 | * @service: the given DPIO service. | |
288 | * @ctx: the notification context. | |
47441f7f | 289 | * @dev: the device that requests to be deregistered |
780b6263 RP |
290 | * |
291 | * This function should be called only after sending the MC command to | |
292 | * to detach the notification-producing device from the DPIO. | |
293 | */ | |
294 | void dpaa2_io_service_deregister(struct dpaa2_io *service, | |
47441f7f IC |
295 | struct dpaa2_io_notification_ctx *ctx, |
296 | struct device *dev) | |
780b6263 RP |
297 | { |
298 | struct dpaa2_io *d = ctx->dpio_private; | |
299 | unsigned long irqflags; | |
300 | ||
301 | if (ctx->is_cdan) | |
302 | qbman_swp_CDAN_disable(d->swp, (u16)ctx->id); | |
303 | ||
304 | spin_lock_irqsave(&d->lock_notifications, irqflags); | |
305 | list_del(&ctx->node); | |
306 | spin_unlock_irqrestore(&d->lock_notifications, irqflags); | |
47441f7f | 307 | |
780b6263 | 308 | } |
53639c64 | 309 | EXPORT_SYMBOL_GPL(dpaa2_io_service_deregister); |
780b6263 RP |
310 | |
311 | /** | |
312 | * dpaa2_io_service_rearm() - Rearm the notification for the given DPIO service. | |
313 | * @d: the given DPIO service. | |
314 | * @ctx: the notification context. | |
315 | * | |
316 | * Once a FQDAN/CDAN has been produced, the corresponding FQ/channel is | |
317 | * considered "disarmed". Ie. the user can issue pull dequeue operations on that | |
318 | * traffic source for as long as it likes. Eventually it may wish to "rearm" | |
319 | * that source to allow it to produce another FQDAN/CDAN, that's what this | |
320 | * function achieves. | |
321 | * | |
322 | * Return 0 for success. | |
323 | */ | |
324 | int dpaa2_io_service_rearm(struct dpaa2_io *d, | |
325 | struct dpaa2_io_notification_ctx *ctx) | |
326 | { | |
327 | unsigned long irqflags; | |
328 | int err; | |
329 | ||
330 | d = service_select_by_cpu(d, ctx->desired_cpu); | |
331 | if (!unlikely(d)) | |
332 | return -ENODEV; | |
333 | ||
334 | spin_lock_irqsave(&d->lock_mgmt_cmd, irqflags); | |
335 | if (ctx->is_cdan) | |
336 | err = qbman_swp_CDAN_enable(d->swp, (u16)ctx->id); | |
337 | else | |
338 | err = qbman_swp_fq_schedule(d->swp, ctx->id); | |
339 | spin_unlock_irqrestore(&d->lock_mgmt_cmd, irqflags); | |
340 | ||
341 | return err; | |
342 | } | |
53639c64 | 343 | EXPORT_SYMBOL_GPL(dpaa2_io_service_rearm); |
780b6263 | 344 | |
48c43de0 HG |
345 | /** |
346 | * dpaa2_io_service_pull_fq() - pull dequeue functions from a fq. | |
347 | * @d: the given DPIO service. | |
348 | * @fqid: the given frame queue id. | |
349 | * @s: the dpaa2_io_store object for the result. | |
350 | * | |
351 | * Return 0 for success, or error code for failure. | |
352 | */ | |
353 | int dpaa2_io_service_pull_fq(struct dpaa2_io *d, u32 fqid, | |
354 | struct dpaa2_io_store *s) | |
355 | { | |
356 | struct qbman_pull_desc pd; | |
357 | int err; | |
358 | ||
359 | qbman_pull_desc_clear(&pd); | |
360 | qbman_pull_desc_set_storage(&pd, s->vaddr, s->paddr, 1); | |
361 | qbman_pull_desc_set_numframes(&pd, (u8)s->max); | |
362 | qbman_pull_desc_set_fq(&pd, fqid); | |
363 | ||
364 | d = service_select(d); | |
365 | if (!d) | |
366 | return -ENODEV; | |
367 | s->swp = d->swp; | |
368 | err = qbman_swp_pull(d->swp, &pd); | |
369 | if (err) | |
370 | s->swp = NULL; | |
371 | ||
372 | return err; | |
373 | } | |
374 | EXPORT_SYMBOL(dpaa2_io_service_pull_fq); | |
375 | ||
780b6263 RP |
376 | /** |
377 | * dpaa2_io_service_pull_channel() - pull dequeue functions from a channel. | |
378 | * @d: the given DPIO service. | |
379 | * @channelid: the given channel id. | |
380 | * @s: the dpaa2_io_store object for the result. | |
381 | * | |
382 | * Return 0 for success, or error code for failure. | |
383 | */ | |
384 | int dpaa2_io_service_pull_channel(struct dpaa2_io *d, u32 channelid, | |
385 | struct dpaa2_io_store *s) | |
386 | { | |
387 | struct qbman_pull_desc pd; | |
388 | int err; | |
389 | ||
390 | qbman_pull_desc_clear(&pd); | |
391 | qbman_pull_desc_set_storage(&pd, s->vaddr, s->paddr, 1); | |
392 | qbman_pull_desc_set_numframes(&pd, (u8)s->max); | |
393 | qbman_pull_desc_set_channel(&pd, channelid, qbman_pull_type_prio); | |
394 | ||
395 | d = service_select(d); | |
396 | if (!d) | |
397 | return -ENODEV; | |
398 | ||
399 | s->swp = d->swp; | |
400 | err = qbman_swp_pull(d->swp, &pd); | |
401 | if (err) | |
402 | s->swp = NULL; | |
403 | ||
404 | return err; | |
405 | } | |
53639c64 | 406 | EXPORT_SYMBOL_GPL(dpaa2_io_service_pull_channel); |
780b6263 | 407 | |
48c43de0 HG |
408 | /** |
409 | * dpaa2_io_service_enqueue_fq() - Enqueue a frame to a frame queue. | |
410 | * @d: the given DPIO service. | |
411 | * @fqid: the given frame queue id. | |
412 | * @fd: the frame descriptor which is enqueued. | |
413 | * | |
414 | * Return 0 for successful enqueue, -EBUSY if the enqueue ring is not ready, | |
415 | * or -ENODEV if there is no dpio service. | |
416 | */ | |
417 | int dpaa2_io_service_enqueue_fq(struct dpaa2_io *d, | |
418 | u32 fqid, | |
419 | const struct dpaa2_fd *fd) | |
420 | { | |
421 | struct qbman_eq_desc ed; | |
422 | ||
423 | d = service_select(d); | |
424 | if (!d) | |
425 | return -ENODEV; | |
426 | ||
427 | qbman_eq_desc_clear(&ed); | |
428 | qbman_eq_desc_set_no_orp(&ed, 0); | |
429 | qbman_eq_desc_set_fq(&ed, fqid); | |
430 | ||
431 | return qbman_swp_enqueue(d->swp, &ed, fd); | |
432 | } | |
433 | EXPORT_SYMBOL(dpaa2_io_service_enqueue_fq); | |
434 | ||
9d988097 YQ |
435 | /** |
436 | * dpaa2_io_service_enqueue_multiple_fq() - Enqueue multiple frames | |
437 | * to a frame queue using one fqid. | |
438 | * @d: the given DPIO service. | |
439 | * @fqid: the given frame queue id. | |
440 | * @fd: the frame descriptor which is enqueued. | |
441 | * @nb: number of frames to be enqueud | |
442 | * | |
443 | * Return 0 for successful enqueue, -EBUSY if the enqueue ring is not ready, | |
444 | * or -ENODEV if there is no dpio service. | |
445 | */ | |
446 | int dpaa2_io_service_enqueue_multiple_fq(struct dpaa2_io *d, | |
447 | u32 fqid, | |
448 | const struct dpaa2_fd *fd, | |
449 | int nb) | |
450 | { | |
451 | struct qbman_eq_desc ed; | |
452 | ||
453 | d = service_select(d); | |
454 | if (!d) | |
455 | return -ENODEV; | |
456 | ||
457 | qbman_eq_desc_clear(&ed); | |
458 | qbman_eq_desc_set_no_orp(&ed, 0); | |
459 | qbman_eq_desc_set_fq(&ed, fqid); | |
460 | ||
461 | return qbman_swp_enqueue_multiple(d->swp, &ed, fd, 0, nb); | |
462 | } | |
463 | EXPORT_SYMBOL(dpaa2_io_service_enqueue_multiple_fq); | |
464 | ||
465 | /** | |
466 | * dpaa2_io_service_enqueue_multiple_desc_fq() - Enqueue multiple frames | |
467 | * to different frame queue using a list of fqids. | |
468 | * @d: the given DPIO service. | |
469 | * @fqid: the given list of frame queue ids. | |
470 | * @fd: the frame descriptor which is enqueued. | |
471 | * @nb: number of frames to be enqueud | |
472 | * | |
473 | * Return 0 for successful enqueue, -EBUSY if the enqueue ring is not ready, | |
474 | * or -ENODEV if there is no dpio service. | |
475 | */ | |
476 | int dpaa2_io_service_enqueue_multiple_desc_fq(struct dpaa2_io *d, | |
477 | u32 *fqid, | |
478 | const struct dpaa2_fd *fd, | |
479 | int nb) | |
480 | { | |
5c4a5999 AB |
481 | struct qbman_eq_desc *ed; |
482 | int i, ret; | |
483 | ||
484 | ed = kcalloc(sizeof(struct qbman_eq_desc), 32, GFP_KERNEL); | |
485 | if (!ed) | |
486 | return -ENOMEM; | |
9d988097 YQ |
487 | |
488 | d = service_select(d); | |
5c4a5999 AB |
489 | if (!d) { |
490 | ret = -ENODEV; | |
491 | goto out; | |
492 | } | |
9d988097 YQ |
493 | |
494 | for (i = 0; i < nb; i++) { | |
495 | qbman_eq_desc_clear(&ed[i]); | |
496 | qbman_eq_desc_set_no_orp(&ed[i], 0); | |
497 | qbman_eq_desc_set_fq(&ed[i], fqid[i]); | |
498 | } | |
499 | ||
5c4a5999 AB |
500 | ret = qbman_swp_enqueue_multiple_desc(d->swp, &ed[0], fd, nb); |
501 | out: | |
502 | kfree(ed); | |
503 | return ret; | |
9d988097 YQ |
504 | } |
505 | EXPORT_SYMBOL(dpaa2_io_service_enqueue_multiple_desc_fq); | |
506 | ||
780b6263 RP |
507 | /** |
508 | * dpaa2_io_service_enqueue_qd() - Enqueue a frame to a QD. | |
509 | * @d: the given DPIO service. | |
510 | * @qdid: the given queuing destination id. | |
511 | * @prio: the given queuing priority. | |
512 | * @qdbin: the given queuing destination bin. | |
513 | * @fd: the frame descriptor which is enqueued. | |
514 | * | |
515 | * Return 0 for successful enqueue, or -EBUSY if the enqueue ring is not ready, | |
516 | * or -ENODEV if there is no dpio service. | |
517 | */ | |
518 | int dpaa2_io_service_enqueue_qd(struct dpaa2_io *d, | |
519 | u32 qdid, u8 prio, u16 qdbin, | |
520 | const struct dpaa2_fd *fd) | |
521 | { | |
522 | struct qbman_eq_desc ed; | |
523 | ||
524 | d = service_select(d); | |
525 | if (!d) | |
526 | return -ENODEV; | |
527 | ||
528 | qbman_eq_desc_clear(&ed); | |
529 | qbman_eq_desc_set_no_orp(&ed, 0); | |
530 | qbman_eq_desc_set_qd(&ed, qdid, qdbin, prio); | |
531 | ||
532 | return qbman_swp_enqueue(d->swp, &ed, fd); | |
533 | } | |
53639c64 | 534 | EXPORT_SYMBOL_GPL(dpaa2_io_service_enqueue_qd); |
780b6263 RP |
535 | |
536 | /** | |
537 | * dpaa2_io_service_release() - Release buffers to a buffer pool. | |
538 | * @d: the given DPIO object. | |
539 | * @bpid: the buffer pool id. | |
540 | * @buffers: the buffers to be released. | |
541 | * @num_buffers: the number of the buffers to be released. | |
542 | * | |
543 | * Return 0 for success, and negative error code for failure. | |
544 | */ | |
545 | int dpaa2_io_service_release(struct dpaa2_io *d, | |
8a533a7d | 546 | u16 bpid, |
780b6263 RP |
547 | const u64 *buffers, |
548 | unsigned int num_buffers) | |
549 | { | |
550 | struct qbman_release_desc rd; | |
551 | ||
552 | d = service_select(d); | |
553 | if (!d) | |
554 | return -ENODEV; | |
555 | ||
556 | qbman_release_desc_clear(&rd); | |
557 | qbman_release_desc_set_bpid(&rd, bpid); | |
558 | ||
559 | return qbman_swp_release(d->swp, &rd, buffers, num_buffers); | |
560 | } | |
53639c64 | 561 | EXPORT_SYMBOL_GPL(dpaa2_io_service_release); |
780b6263 RP |
562 | |
563 | /** | |
564 | * dpaa2_io_service_acquire() - Acquire buffers from a buffer pool. | |
565 | * @d: the given DPIO object. | |
566 | * @bpid: the buffer pool id. | |
567 | * @buffers: the buffer addresses for acquired buffers. | |
568 | * @num_buffers: the expected number of the buffers to acquire. | |
569 | * | |
570 | * Return a negative error code if the command failed, otherwise it returns | |
571 | * the number of buffers acquired, which may be less than the number requested. | |
572 | * Eg. if the buffer pool is empty, this will return zero. | |
573 | */ | |
574 | int dpaa2_io_service_acquire(struct dpaa2_io *d, | |
8a533a7d | 575 | u16 bpid, |
780b6263 RP |
576 | u64 *buffers, |
577 | unsigned int num_buffers) | |
578 | { | |
579 | unsigned long irqflags; | |
580 | int err; | |
581 | ||
582 | d = service_select(d); | |
583 | if (!d) | |
584 | return -ENODEV; | |
585 | ||
586 | spin_lock_irqsave(&d->lock_mgmt_cmd, irqflags); | |
587 | err = qbman_swp_acquire(d->swp, bpid, buffers, num_buffers); | |
588 | spin_unlock_irqrestore(&d->lock_mgmt_cmd, irqflags); | |
589 | ||
590 | return err; | |
591 | } | |
53639c64 | 592 | EXPORT_SYMBOL_GPL(dpaa2_io_service_acquire); |
780b6263 RP |
593 | |
594 | /* | |
595 | * 'Stores' are reusable memory blocks for holding dequeue results, and to | |
596 | * assist with parsing those results. | |
597 | */ | |
598 | ||
599 | /** | |
600 | * dpaa2_io_store_create() - Create the dma memory storage for dequeue result. | |
9d988097 | 601 | * @max_frames: the maximum number of dequeued result for frames, must be <= 32. |
780b6263 RP |
602 | * @dev: the device to allow mapping/unmapping the DMAable region. |
603 | * | |
604 | * The size of the storage is "max_frames*sizeof(struct dpaa2_dq)". | |
605 | * The 'dpaa2_io_store' returned is a DPIO service managed object. | |
606 | * | |
1802d96e | 607 | * Return pointer to dpaa2_io_store struct for successfully created storage |
780b6263 RP |
608 | * memory, or NULL on error. |
609 | */ | |
610 | struct dpaa2_io_store *dpaa2_io_store_create(unsigned int max_frames, | |
611 | struct device *dev) | |
612 | { | |
613 | struct dpaa2_io_store *ret; | |
614 | size_t size; | |
615 | ||
9d988097 | 616 | if (!max_frames || (max_frames > 32)) |
780b6263 RP |
617 | return NULL; |
618 | ||
619 | ret = kmalloc(sizeof(*ret), GFP_KERNEL); | |
620 | if (!ret) | |
621 | return NULL; | |
622 | ||
623 | ret->max = max_frames; | |
624 | size = max_frames * sizeof(struct dpaa2_dq) + 64; | |
625 | ret->alloced_addr = kzalloc(size, GFP_KERNEL); | |
626 | if (!ret->alloced_addr) { | |
627 | kfree(ret); | |
628 | return NULL; | |
629 | } | |
630 | ||
631 | ret->vaddr = PTR_ALIGN(ret->alloced_addr, 64); | |
632 | ret->paddr = dma_map_single(dev, ret->vaddr, | |
633 | sizeof(struct dpaa2_dq) * max_frames, | |
634 | DMA_FROM_DEVICE); | |
635 | if (dma_mapping_error(dev, ret->paddr)) { | |
636 | kfree(ret->alloced_addr); | |
637 | kfree(ret); | |
638 | return NULL; | |
639 | } | |
640 | ||
641 | ret->idx = 0; | |
642 | ret->dev = dev; | |
643 | ||
644 | return ret; | |
645 | } | |
53639c64 | 646 | EXPORT_SYMBOL_GPL(dpaa2_io_store_create); |
780b6263 RP |
647 | |
648 | /** | |
649 | * dpaa2_io_store_destroy() - Frees the dma memory storage for dequeue | |
650 | * result. | |
651 | * @s: the storage memory to be destroyed. | |
652 | */ | |
653 | void dpaa2_io_store_destroy(struct dpaa2_io_store *s) | |
654 | { | |
655 | dma_unmap_single(s->dev, s->paddr, sizeof(struct dpaa2_dq) * s->max, | |
656 | DMA_FROM_DEVICE); | |
657 | kfree(s->alloced_addr); | |
658 | kfree(s); | |
659 | } | |
53639c64 | 660 | EXPORT_SYMBOL_GPL(dpaa2_io_store_destroy); |
780b6263 RP |
661 | |
662 | /** | |
663 | * dpaa2_io_store_next() - Determine when the next dequeue result is available. | |
664 | * @s: the dpaa2_io_store object. | |
665 | * @is_last: indicate whether this is the last frame in the pull command. | |
666 | * | |
667 | * When an object driver performs dequeues to a dpaa2_io_store, this function | |
668 | * can be used to determine when the next frame result is available. Once | |
669 | * this function returns non-NULL, a subsequent call to it will try to find | |
670 | * the next dequeue result. | |
671 | * | |
672 | * Note that if a pull-dequeue has a NULL result because the target FQ/channel | |
673 | * was empty, then this function will also return NULL (rather than expecting | |
674 | * the caller to always check for this. As such, "is_last" can be used to | |
675 | * differentiate between "end-of-empty-dequeue" and "still-waiting". | |
676 | * | |
677 | * Return dequeue result for a valid dequeue result, or NULL for empty dequeue. | |
678 | */ | |
679 | struct dpaa2_dq *dpaa2_io_store_next(struct dpaa2_io_store *s, int *is_last) | |
680 | { | |
681 | int match; | |
682 | struct dpaa2_dq *ret = &s->vaddr[s->idx]; | |
683 | ||
684 | match = qbman_result_has_new_result(s->swp, ret); | |
685 | if (!match) { | |
686 | *is_last = 0; | |
687 | return NULL; | |
688 | } | |
689 | ||
690 | s->idx++; | |
691 | ||
692 | if (dpaa2_dq_is_pull_complete(ret)) { | |
693 | *is_last = 1; | |
694 | s->idx = 0; | |
695 | /* | |
696 | * If we get an empty dequeue result to terminate a zero-results | |
697 | * vdqcr, return NULL to the caller rather than expecting him to | |
698 | * check non-NULL results every time. | |
699 | */ | |
700 | if (!(dpaa2_dq_flags(ret) & DPAA2_DQ_STAT_VALIDFRAME)) | |
701 | ret = NULL; | |
702 | } else { | |
f1e250bf | 703 | prefetch(&s->vaddr[s->idx]); |
780b6263 RP |
704 | *is_last = 0; |
705 | } | |
706 | ||
707 | return ret; | |
708 | } | |
53639c64 | 709 | EXPORT_SYMBOL_GPL(dpaa2_io_store_next); |
e80081c3 RP |
710 | |
711 | /** | |
712 | * dpaa2_io_query_fq_count() - Get the frame and byte count for a given fq. | |
713 | * @d: the given DPIO object. | |
714 | * @fqid: the id of frame queue to be queried. | |
715 | * @fcnt: the queried frame count. | |
716 | * @bcnt: the queried byte count. | |
717 | * | |
718 | * Knowing the FQ count at run-time can be useful in debugging situations. | |
719 | * The instantaneous frame- and byte-count are hereby returned. | |
720 | * | |
721 | * Return 0 for a successful query, and negative error code if query fails. | |
722 | */ | |
723 | int dpaa2_io_query_fq_count(struct dpaa2_io *d, u32 fqid, | |
724 | u32 *fcnt, u32 *bcnt) | |
725 | { | |
726 | struct qbman_fq_query_np_rslt state; | |
727 | struct qbman_swp *swp; | |
728 | unsigned long irqflags; | |
729 | int ret; | |
730 | ||
731 | d = service_select(d); | |
732 | if (!d) | |
733 | return -ENODEV; | |
734 | ||
735 | swp = d->swp; | |
736 | spin_lock_irqsave(&d->lock_mgmt_cmd, irqflags); | |
737 | ret = qbman_fq_query_state(swp, fqid, &state); | |
738 | spin_unlock_irqrestore(&d->lock_mgmt_cmd, irqflags); | |
739 | if (ret) | |
740 | return ret; | |
741 | *fcnt = qbman_fq_state_frame_count(&state); | |
742 | *bcnt = qbman_fq_state_byte_count(&state); | |
743 | ||
744 | return 0; | |
745 | } | |
746 | EXPORT_SYMBOL_GPL(dpaa2_io_query_fq_count); | |
747 | ||
748 | /** | |
749 | * dpaa2_io_query_bp_count() - Query the number of buffers currently in a | |
750 | * buffer pool. | |
751 | * @d: the given DPIO object. | |
752 | * @bpid: the index of buffer pool to be queried. | |
753 | * @num: the queried number of buffers in the buffer pool. | |
754 | * | |
755 | * Return 0 for a successful query, and negative error code if query fails. | |
756 | */ | |
757 | int dpaa2_io_query_bp_count(struct dpaa2_io *d, u16 bpid, u32 *num) | |
758 | { | |
759 | struct qbman_bp_query_rslt state; | |
760 | struct qbman_swp *swp; | |
761 | unsigned long irqflags; | |
762 | int ret; | |
763 | ||
764 | d = service_select(d); | |
765 | if (!d) | |
766 | return -ENODEV; | |
767 | ||
768 | swp = d->swp; | |
769 | spin_lock_irqsave(&d->lock_mgmt_cmd, irqflags); | |
770 | ret = qbman_bp_query(swp, bpid, &state); | |
771 | spin_unlock_irqrestore(&d->lock_mgmt_cmd, irqflags); | |
772 | if (ret) | |
773 | return ret; | |
774 | *num = qbman_bp_info_num_free_bufs(&state); | |
775 | return 0; | |
776 | } | |
777 | EXPORT_SYMBOL_GPL(dpaa2_io_query_bp_count); |