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41f93af9 SN |
1 | /* |
2 | * Keystone Queue Manager subsystem driver | |
3 | * | |
4 | * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com | |
5 | * Authors: Sandeep Nair <sandeep_n@ti.com> | |
6 | * Cyril Chemparathy <cyril@ti.com> | |
7 | * Santosh Shilimkar <santosh.shilimkar@ti.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * version 2 as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/device.h> | |
22 | #include <linux/clk.h> | |
23 | #include <linux/io.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/bitops.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/spinlock.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/dma-mapping.h> | |
30 | #include <linux/of.h> | |
31 | #include <linux/of_irq.h> | |
32 | #include <linux/of_device.h> | |
33 | #include <linux/of_address.h> | |
34 | #include <linux/pm_runtime.h> | |
35 | #include <linux/firmware.h> | |
36 | #include <linux/debugfs.h> | |
37 | #include <linux/seq_file.h> | |
38 | #include <linux/string.h> | |
39 | #include <linux/soc/ti/knav_qmss.h> | |
40 | ||
41 | #include "knav_qmss.h" | |
42 | ||
43 | static struct knav_device *kdev; | |
44 | static DEFINE_MUTEX(knav_dev_lock); | |
45 | ||
46 | /* Queue manager register indices in DTS */ | |
47 | #define KNAV_QUEUE_PEEK_REG_INDEX 0 | |
48 | #define KNAV_QUEUE_STATUS_REG_INDEX 1 | |
49 | #define KNAV_QUEUE_CONFIG_REG_INDEX 2 | |
50 | #define KNAV_QUEUE_REGION_REG_INDEX 3 | |
51 | #define KNAV_QUEUE_PUSH_REG_INDEX 4 | |
52 | #define KNAV_QUEUE_POP_REG_INDEX 5 | |
53 | ||
54 | /* PDSP register indices in DTS */ | |
55 | #define KNAV_QUEUE_PDSP_IRAM_REG_INDEX 0 | |
56 | #define KNAV_QUEUE_PDSP_REGS_REG_INDEX 1 | |
57 | #define KNAV_QUEUE_PDSP_INTD_REG_INDEX 2 | |
58 | #define KNAV_QUEUE_PDSP_CMD_REG_INDEX 3 | |
59 | ||
60 | #define knav_queue_idx_to_inst(kdev, idx) \ | |
61 | (kdev->instances + (idx << kdev->inst_shift)) | |
62 | ||
63 | #define for_each_handle_rcu(qh, inst) \ | |
64 | list_for_each_entry_rcu(qh, &inst->handles, list) | |
65 | ||
66 | #define for_each_instance(idx, inst, kdev) \ | |
67 | for (idx = 0, inst = kdev->instances; \ | |
68 | idx < (kdev)->num_queues_in_use; \ | |
69 | idx++, inst = knav_queue_idx_to_inst(kdev, idx)) | |
70 | ||
96ee19be MK |
71 | /* All firmware file names end up here. List the firmware file names below. |
72 | * Newest followed by older ones. Search is done from start of the array | |
73 | * until a firmware file is found. | |
74 | */ | |
75 | const char *knav_acc_firmwares[] = {"ks2_qmss_pdsp_acc48.bin"}; | |
76 | ||
41f93af9 SN |
77 | /** |
78 | * knav_queue_notify: qmss queue notfier call | |
79 | * | |
80 | * @inst: qmss queue instance like accumulator | |
81 | */ | |
82 | void knav_queue_notify(struct knav_queue_inst *inst) | |
83 | { | |
84 | struct knav_queue *qh; | |
85 | ||
86 | if (!inst) | |
87 | return; | |
88 | ||
89 | rcu_read_lock(); | |
90 | for_each_handle_rcu(qh, inst) { | |
91 | if (atomic_read(&qh->notifier_enabled) <= 0) | |
92 | continue; | |
93 | if (WARN_ON(!qh->notifier_fn)) | |
94 | continue; | |
95 | atomic_inc(&qh->stats.notifies); | |
96 | qh->notifier_fn(qh->notifier_fn_arg); | |
97 | } | |
98 | rcu_read_unlock(); | |
99 | } | |
100 | EXPORT_SYMBOL_GPL(knav_queue_notify); | |
101 | ||
102 | static irqreturn_t knav_queue_int_handler(int irq, void *_instdata) | |
103 | { | |
104 | struct knav_queue_inst *inst = _instdata; | |
105 | ||
106 | knav_queue_notify(inst); | |
107 | return IRQ_HANDLED; | |
108 | } | |
109 | ||
110 | static int knav_queue_setup_irq(struct knav_range_info *range, | |
111 | struct knav_queue_inst *inst) | |
112 | { | |
113 | unsigned queue = inst->id - range->queue_base; | |
114 | unsigned long cpu_map; | |
115 | int ret = 0, irq; | |
116 | ||
117 | if (range->flags & RANGE_HAS_IRQ) { | |
118 | irq = range->irqs[queue].irq; | |
119 | cpu_map = range->irqs[queue].cpu_map; | |
120 | ret = request_irq(irq, knav_queue_int_handler, 0, | |
121 | inst->irq_name, inst); | |
122 | if (ret) | |
123 | return ret; | |
124 | disable_irq(irq); | |
125 | if (cpu_map) { | |
126 | ret = irq_set_affinity_hint(irq, to_cpumask(&cpu_map)); | |
127 | if (ret) { | |
128 | dev_warn(range->kdev->dev, | |
129 | "Failed to set IRQ affinity\n"); | |
130 | return ret; | |
131 | } | |
132 | } | |
133 | } | |
134 | return ret; | |
135 | } | |
136 | ||
137 | static void knav_queue_free_irq(struct knav_queue_inst *inst) | |
138 | { | |
139 | struct knav_range_info *range = inst->range; | |
140 | unsigned queue = inst->id - inst->range->queue_base; | |
141 | int irq; | |
142 | ||
143 | if (range->flags & RANGE_HAS_IRQ) { | |
144 | irq = range->irqs[queue].irq; | |
145 | irq_set_affinity_hint(irq, NULL); | |
146 | free_irq(irq, inst); | |
147 | } | |
148 | } | |
149 | ||
150 | static inline bool knav_queue_is_busy(struct knav_queue_inst *inst) | |
151 | { | |
152 | return !list_empty(&inst->handles); | |
153 | } | |
154 | ||
155 | static inline bool knav_queue_is_reserved(struct knav_queue_inst *inst) | |
156 | { | |
157 | return inst->range->flags & RANGE_RESERVED; | |
158 | } | |
159 | ||
160 | static inline bool knav_queue_is_shared(struct knav_queue_inst *inst) | |
161 | { | |
162 | struct knav_queue *tmp; | |
163 | ||
164 | rcu_read_lock(); | |
165 | for_each_handle_rcu(tmp, inst) { | |
166 | if (tmp->flags & KNAV_QUEUE_SHARED) { | |
167 | rcu_read_unlock(); | |
168 | return true; | |
169 | } | |
170 | } | |
171 | rcu_read_unlock(); | |
172 | return false; | |
173 | } | |
174 | ||
175 | static inline bool knav_queue_match_type(struct knav_queue_inst *inst, | |
176 | unsigned type) | |
177 | { | |
178 | if ((type == KNAV_QUEUE_QPEND) && | |
179 | (inst->range->flags & RANGE_HAS_IRQ)) { | |
180 | return true; | |
181 | } else if ((type == KNAV_QUEUE_ACC) && | |
182 | (inst->range->flags & RANGE_HAS_ACCUMULATOR)) { | |
183 | return true; | |
184 | } else if ((type == KNAV_QUEUE_GP) && | |
185 | !(inst->range->flags & | |
186 | (RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ))) { | |
187 | return true; | |
188 | } | |
189 | return false; | |
190 | } | |
191 | ||
192 | static inline struct knav_queue_inst * | |
193 | knav_queue_match_id_to_inst(struct knav_device *kdev, unsigned id) | |
194 | { | |
195 | struct knav_queue_inst *inst; | |
196 | int idx; | |
197 | ||
198 | for_each_instance(idx, inst, kdev) { | |
199 | if (inst->id == id) | |
200 | return inst; | |
201 | } | |
202 | return NULL; | |
203 | } | |
204 | ||
205 | static inline struct knav_queue_inst *knav_queue_find_by_id(int id) | |
206 | { | |
207 | if (kdev->base_id <= id && | |
208 | kdev->base_id + kdev->num_queues > id) { | |
209 | id -= kdev->base_id; | |
210 | return knav_queue_match_id_to_inst(kdev, id); | |
211 | } | |
212 | return NULL; | |
213 | } | |
214 | ||
215 | static struct knav_queue *__knav_queue_open(struct knav_queue_inst *inst, | |
216 | const char *name, unsigned flags) | |
217 | { | |
218 | struct knav_queue *qh; | |
219 | unsigned id; | |
220 | int ret = 0; | |
221 | ||
222 | qh = devm_kzalloc(inst->kdev->dev, sizeof(*qh), GFP_KERNEL); | |
223 | if (!qh) | |
224 | return ERR_PTR(-ENOMEM); | |
225 | ||
226 | qh->flags = flags; | |
227 | qh->inst = inst; | |
228 | id = inst->id - inst->qmgr->start_queue; | |
229 | qh->reg_push = &inst->qmgr->reg_push[id]; | |
230 | qh->reg_pop = &inst->qmgr->reg_pop[id]; | |
231 | qh->reg_peek = &inst->qmgr->reg_peek[id]; | |
232 | ||
233 | /* first opener? */ | |
234 | if (!knav_queue_is_busy(inst)) { | |
235 | struct knav_range_info *range = inst->range; | |
236 | ||
237 | inst->name = kstrndup(name, KNAV_NAME_SIZE, GFP_KERNEL); | |
238 | if (range->ops && range->ops->open_queue) | |
239 | ret = range->ops->open_queue(range, inst, flags); | |
240 | ||
241 | if (ret) { | |
242 | devm_kfree(inst->kdev->dev, qh); | |
243 | return ERR_PTR(ret); | |
244 | } | |
245 | } | |
246 | list_add_tail_rcu(&qh->list, &inst->handles); | |
247 | return qh; | |
248 | } | |
249 | ||
250 | static struct knav_queue * | |
251 | knav_queue_open_by_id(const char *name, unsigned id, unsigned flags) | |
252 | { | |
253 | struct knav_queue_inst *inst; | |
254 | struct knav_queue *qh; | |
255 | ||
256 | mutex_lock(&knav_dev_lock); | |
257 | ||
258 | qh = ERR_PTR(-ENODEV); | |
259 | inst = knav_queue_find_by_id(id); | |
260 | if (!inst) | |
261 | goto unlock_ret; | |
262 | ||
263 | qh = ERR_PTR(-EEXIST); | |
264 | if (!(flags & KNAV_QUEUE_SHARED) && knav_queue_is_busy(inst)) | |
265 | goto unlock_ret; | |
266 | ||
267 | qh = ERR_PTR(-EBUSY); | |
268 | if ((flags & KNAV_QUEUE_SHARED) && | |
269 | (knav_queue_is_busy(inst) && !knav_queue_is_shared(inst))) | |
270 | goto unlock_ret; | |
271 | ||
272 | qh = __knav_queue_open(inst, name, flags); | |
273 | ||
274 | unlock_ret: | |
275 | mutex_unlock(&knav_dev_lock); | |
276 | ||
277 | return qh; | |
278 | } | |
279 | ||
280 | static struct knav_queue *knav_queue_open_by_type(const char *name, | |
281 | unsigned type, unsigned flags) | |
282 | { | |
283 | struct knav_queue_inst *inst; | |
284 | struct knav_queue *qh = ERR_PTR(-EINVAL); | |
285 | int idx; | |
286 | ||
287 | mutex_lock(&knav_dev_lock); | |
288 | ||
289 | for_each_instance(idx, inst, kdev) { | |
290 | if (knav_queue_is_reserved(inst)) | |
291 | continue; | |
292 | if (!knav_queue_match_type(inst, type)) | |
293 | continue; | |
294 | if (knav_queue_is_busy(inst)) | |
295 | continue; | |
296 | qh = __knav_queue_open(inst, name, flags); | |
297 | goto unlock_ret; | |
298 | } | |
299 | ||
300 | unlock_ret: | |
301 | mutex_unlock(&knav_dev_lock); | |
302 | return qh; | |
303 | } | |
304 | ||
305 | static void knav_queue_set_notify(struct knav_queue_inst *inst, bool enabled) | |
306 | { | |
307 | struct knav_range_info *range = inst->range; | |
308 | ||
309 | if (range->ops && range->ops->set_notify) | |
310 | range->ops->set_notify(range, inst, enabled); | |
311 | } | |
312 | ||
313 | static int knav_queue_enable_notifier(struct knav_queue *qh) | |
314 | { | |
315 | struct knav_queue_inst *inst = qh->inst; | |
316 | bool first; | |
317 | ||
318 | if (WARN_ON(!qh->notifier_fn)) | |
319 | return -EINVAL; | |
320 | ||
321 | /* Adjust the per handle notifier count */ | |
322 | first = (atomic_inc_return(&qh->notifier_enabled) == 1); | |
323 | if (!first) | |
324 | return 0; /* nothing to do */ | |
325 | ||
326 | /* Now adjust the per instance notifier count */ | |
327 | first = (atomic_inc_return(&inst->num_notifiers) == 1); | |
328 | if (first) | |
329 | knav_queue_set_notify(inst, true); | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | static int knav_queue_disable_notifier(struct knav_queue *qh) | |
335 | { | |
336 | struct knav_queue_inst *inst = qh->inst; | |
337 | bool last; | |
338 | ||
339 | last = (atomic_dec_return(&qh->notifier_enabled) == 0); | |
340 | if (!last) | |
341 | return 0; /* nothing to do */ | |
342 | ||
343 | last = (atomic_dec_return(&inst->num_notifiers) == 0); | |
344 | if (last) | |
345 | knav_queue_set_notify(inst, false); | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | static int knav_queue_set_notifier(struct knav_queue *qh, | |
351 | struct knav_queue_notify_config *cfg) | |
352 | { | |
353 | knav_queue_notify_fn old_fn = qh->notifier_fn; | |
354 | ||
355 | if (!cfg) | |
356 | return -EINVAL; | |
357 | ||
358 | if (!(qh->inst->range->flags & (RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ))) | |
359 | return -ENOTSUPP; | |
360 | ||
361 | if (!cfg->fn && old_fn) | |
362 | knav_queue_disable_notifier(qh); | |
363 | ||
364 | qh->notifier_fn = cfg->fn; | |
365 | qh->notifier_fn_arg = cfg->fn_arg; | |
366 | ||
367 | if (cfg->fn && !old_fn) | |
368 | knav_queue_enable_notifier(qh); | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | static int knav_gp_set_notify(struct knav_range_info *range, | |
374 | struct knav_queue_inst *inst, | |
375 | bool enabled) | |
376 | { | |
377 | unsigned queue; | |
378 | ||
379 | if (range->flags & RANGE_HAS_IRQ) { | |
380 | queue = inst->id - range->queue_base; | |
381 | if (enabled) | |
382 | enable_irq(range->irqs[queue].irq); | |
383 | else | |
384 | disable_irq_nosync(range->irqs[queue].irq); | |
385 | } | |
386 | return 0; | |
387 | } | |
388 | ||
389 | static int knav_gp_open_queue(struct knav_range_info *range, | |
390 | struct knav_queue_inst *inst, unsigned flags) | |
391 | { | |
392 | return knav_queue_setup_irq(range, inst); | |
393 | } | |
394 | ||
395 | static int knav_gp_close_queue(struct knav_range_info *range, | |
396 | struct knav_queue_inst *inst) | |
397 | { | |
398 | knav_queue_free_irq(inst); | |
399 | return 0; | |
400 | } | |
401 | ||
402 | struct knav_range_ops knav_gp_range_ops = { | |
403 | .set_notify = knav_gp_set_notify, | |
404 | .open_queue = knav_gp_open_queue, | |
405 | .close_queue = knav_gp_close_queue, | |
406 | }; | |
407 | ||
408 | ||
409 | static int knav_queue_get_count(void *qhandle) | |
410 | { | |
411 | struct knav_queue *qh = qhandle; | |
412 | struct knav_queue_inst *inst = qh->inst; | |
413 | ||
414 | return readl_relaxed(&qh->reg_peek[0].entry_count) + | |
415 | atomic_read(&inst->desc_count); | |
416 | } | |
417 | ||
418 | static void knav_queue_debug_show_instance(struct seq_file *s, | |
419 | struct knav_queue_inst *inst) | |
420 | { | |
421 | struct knav_device *kdev = inst->kdev; | |
422 | struct knav_queue *qh; | |
423 | ||
424 | if (!knav_queue_is_busy(inst)) | |
425 | return; | |
426 | ||
427 | seq_printf(s, "\tqueue id %d (%s)\n", | |
428 | kdev->base_id + inst->id, inst->name); | |
429 | for_each_handle_rcu(qh, inst) { | |
430 | seq_printf(s, "\t\thandle %p: ", qh); | |
431 | seq_printf(s, "pushes %8d, ", | |
432 | atomic_read(&qh->stats.pushes)); | |
433 | seq_printf(s, "pops %8d, ", | |
434 | atomic_read(&qh->stats.pops)); | |
435 | seq_printf(s, "count %8d, ", | |
436 | knav_queue_get_count(qh)); | |
437 | seq_printf(s, "notifies %8d, ", | |
438 | atomic_read(&qh->stats.notifies)); | |
439 | seq_printf(s, "push errors %8d, ", | |
440 | atomic_read(&qh->stats.push_errors)); | |
441 | seq_printf(s, "pop errors %8d\n", | |
442 | atomic_read(&qh->stats.pop_errors)); | |
443 | } | |
444 | } | |
445 | ||
446 | static int knav_queue_debug_show(struct seq_file *s, void *v) | |
447 | { | |
448 | struct knav_queue_inst *inst; | |
449 | int idx; | |
450 | ||
451 | mutex_lock(&knav_dev_lock); | |
452 | seq_printf(s, "%s: %u-%u\n", | |
453 | dev_name(kdev->dev), kdev->base_id, | |
454 | kdev->base_id + kdev->num_queues - 1); | |
455 | for_each_instance(idx, inst, kdev) | |
456 | knav_queue_debug_show_instance(s, inst); | |
457 | mutex_unlock(&knav_dev_lock); | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | static int knav_queue_debug_open(struct inode *inode, struct file *file) | |
463 | { | |
464 | return single_open(file, knav_queue_debug_show, NULL); | |
465 | } | |
466 | ||
467 | static const struct file_operations knav_queue_debug_ops = { | |
468 | .open = knav_queue_debug_open, | |
469 | .read = seq_read, | |
470 | .llseek = seq_lseek, | |
471 | .release = single_release, | |
472 | }; | |
473 | ||
474 | static inline int knav_queue_pdsp_wait(u32 * __iomem addr, unsigned timeout, | |
475 | u32 flags) | |
476 | { | |
477 | unsigned long end; | |
478 | u32 val = 0; | |
479 | ||
480 | end = jiffies + msecs_to_jiffies(timeout); | |
481 | while (time_after(end, jiffies)) { | |
482 | val = readl_relaxed(addr); | |
483 | if (flags) | |
484 | val &= flags; | |
485 | if (!val) | |
486 | break; | |
487 | cpu_relax(); | |
488 | } | |
489 | return val ? -ETIMEDOUT : 0; | |
490 | } | |
491 | ||
492 | ||
493 | static int knav_queue_flush(struct knav_queue *qh) | |
494 | { | |
495 | struct knav_queue_inst *inst = qh->inst; | |
496 | unsigned id = inst->id - inst->qmgr->start_queue; | |
497 | ||
498 | atomic_set(&inst->desc_count, 0); | |
499 | writel_relaxed(0, &inst->qmgr->reg_push[id].ptr_size_thresh); | |
500 | return 0; | |
501 | } | |
502 | ||
503 | /** | |
504 | * knav_queue_open() - open a hardware queue | |
505 | * @name - name to give the queue handle | |
506 | * @id - desired queue number if any or specifes the type | |
507 | * of queue | |
508 | * @flags - the following flags are applicable to queues: | |
509 | * KNAV_QUEUE_SHARED - allow the queue to be shared. Queues are | |
510 | * exclusive by default. | |
511 | * Subsequent attempts to open a shared queue should | |
512 | * also have this flag. | |
513 | * | |
514 | * Returns a handle to the open hardware queue if successful. Use IS_ERR() | |
515 | * to check the returned value for error codes. | |
516 | */ | |
517 | void *knav_queue_open(const char *name, unsigned id, | |
518 | unsigned flags) | |
519 | { | |
520 | struct knav_queue *qh = ERR_PTR(-EINVAL); | |
521 | ||
522 | switch (id) { | |
523 | case KNAV_QUEUE_QPEND: | |
524 | case KNAV_QUEUE_ACC: | |
525 | case KNAV_QUEUE_GP: | |
526 | qh = knav_queue_open_by_type(name, id, flags); | |
527 | break; | |
528 | ||
529 | default: | |
530 | qh = knav_queue_open_by_id(name, id, flags); | |
531 | break; | |
532 | } | |
533 | return qh; | |
534 | } | |
535 | EXPORT_SYMBOL_GPL(knav_queue_open); | |
536 | ||
537 | /** | |
538 | * knav_queue_close() - close a hardware queue handle | |
539 | * @qh - handle to close | |
540 | */ | |
541 | void knav_queue_close(void *qhandle) | |
542 | { | |
543 | struct knav_queue *qh = qhandle; | |
544 | struct knav_queue_inst *inst = qh->inst; | |
545 | ||
546 | while (atomic_read(&qh->notifier_enabled) > 0) | |
547 | knav_queue_disable_notifier(qh); | |
548 | ||
549 | mutex_lock(&knav_dev_lock); | |
550 | list_del_rcu(&qh->list); | |
551 | mutex_unlock(&knav_dev_lock); | |
552 | synchronize_rcu(); | |
553 | if (!knav_queue_is_busy(inst)) { | |
554 | struct knav_range_info *range = inst->range; | |
555 | ||
556 | if (range->ops && range->ops->close_queue) | |
557 | range->ops->close_queue(range, inst); | |
558 | } | |
559 | devm_kfree(inst->kdev->dev, qh); | |
560 | } | |
561 | EXPORT_SYMBOL_GPL(knav_queue_close); | |
562 | ||
563 | /** | |
564 | * knav_queue_device_control() - Perform control operations on a queue | |
565 | * @qh - queue handle | |
566 | * @cmd - control commands | |
567 | * @arg - command argument | |
568 | * | |
569 | * Returns 0 on success, errno otherwise. | |
570 | */ | |
571 | int knav_queue_device_control(void *qhandle, enum knav_queue_ctrl_cmd cmd, | |
572 | unsigned long arg) | |
573 | { | |
574 | struct knav_queue *qh = qhandle; | |
575 | struct knav_queue_notify_config *cfg; | |
576 | int ret; | |
577 | ||
578 | switch ((int)cmd) { | |
579 | case KNAV_QUEUE_GET_ID: | |
580 | ret = qh->inst->kdev->base_id + qh->inst->id; | |
581 | break; | |
582 | ||
583 | case KNAV_QUEUE_FLUSH: | |
584 | ret = knav_queue_flush(qh); | |
585 | break; | |
586 | ||
587 | case KNAV_QUEUE_SET_NOTIFIER: | |
588 | cfg = (void *)arg; | |
589 | ret = knav_queue_set_notifier(qh, cfg); | |
590 | break; | |
591 | ||
592 | case KNAV_QUEUE_ENABLE_NOTIFY: | |
593 | ret = knav_queue_enable_notifier(qh); | |
594 | break; | |
595 | ||
596 | case KNAV_QUEUE_DISABLE_NOTIFY: | |
597 | ret = knav_queue_disable_notifier(qh); | |
598 | break; | |
599 | ||
600 | case KNAV_QUEUE_GET_COUNT: | |
601 | ret = knav_queue_get_count(qh); | |
602 | break; | |
603 | ||
604 | default: | |
605 | ret = -ENOTSUPP; | |
606 | break; | |
607 | } | |
608 | return ret; | |
609 | } | |
610 | EXPORT_SYMBOL_GPL(knav_queue_device_control); | |
611 | ||
612 | ||
613 | ||
614 | /** | |
615 | * knav_queue_push() - push data (or descriptor) to the tail of a queue | |
616 | * @qh - hardware queue handle | |
617 | * @data - data to push | |
618 | * @size - size of data to push | |
619 | * @flags - can be used to pass additional information | |
620 | * | |
621 | * Returns 0 on success, errno otherwise. | |
622 | */ | |
623 | int knav_queue_push(void *qhandle, dma_addr_t dma, | |
624 | unsigned size, unsigned flags) | |
625 | { | |
626 | struct knav_queue *qh = qhandle; | |
627 | u32 val; | |
628 | ||
629 | val = (u32)dma | ((size / 16) - 1); | |
630 | writel_relaxed(val, &qh->reg_push[0].ptr_size_thresh); | |
631 | ||
632 | atomic_inc(&qh->stats.pushes); | |
633 | return 0; | |
634 | } | |
97f39af4 | 635 | EXPORT_SYMBOL_GPL(knav_queue_push); |
41f93af9 SN |
636 | |
637 | /** | |
638 | * knav_queue_pop() - pop data (or descriptor) from the head of a queue | |
639 | * @qh - hardware queue handle | |
640 | * @size - (optional) size of the data pop'ed. | |
641 | * | |
642 | * Returns a DMA address on success, 0 on failure. | |
643 | */ | |
644 | dma_addr_t knav_queue_pop(void *qhandle, unsigned *size) | |
645 | { | |
646 | struct knav_queue *qh = qhandle; | |
647 | struct knav_queue_inst *inst = qh->inst; | |
648 | dma_addr_t dma; | |
649 | u32 val, idx; | |
650 | ||
651 | /* are we accumulated? */ | |
652 | if (inst->descs) { | |
653 | if (unlikely(atomic_dec_return(&inst->desc_count) < 0)) { | |
654 | atomic_inc(&inst->desc_count); | |
655 | return 0; | |
656 | } | |
657 | idx = atomic_inc_return(&inst->desc_head); | |
658 | idx &= ACC_DESCS_MASK; | |
659 | val = inst->descs[idx]; | |
660 | } else { | |
661 | val = readl_relaxed(&qh->reg_pop[0].ptr_size_thresh); | |
662 | if (unlikely(!val)) | |
663 | return 0; | |
664 | } | |
665 | ||
666 | dma = val & DESC_PTR_MASK; | |
667 | if (size) | |
668 | *size = ((val & DESC_SIZE_MASK) + 1) * 16; | |
669 | ||
670 | atomic_inc(&qh->stats.pops); | |
671 | return dma; | |
672 | } | |
97f39af4 | 673 | EXPORT_SYMBOL_GPL(knav_queue_pop); |
41f93af9 SN |
674 | |
675 | /* carve out descriptors and push into queue */ | |
676 | static void kdesc_fill_pool(struct knav_pool *pool) | |
677 | { | |
678 | struct knav_region *region; | |
679 | int i; | |
680 | ||
681 | region = pool->region; | |
682 | pool->desc_size = region->desc_size; | |
683 | for (i = 0; i < pool->num_desc; i++) { | |
684 | int index = pool->region_offset + i; | |
685 | dma_addr_t dma_addr; | |
686 | unsigned dma_size; | |
687 | dma_addr = region->dma_start + (region->desc_size * index); | |
688 | dma_size = ALIGN(pool->desc_size, SMP_CACHE_BYTES); | |
689 | dma_sync_single_for_device(pool->dev, dma_addr, dma_size, | |
690 | DMA_TO_DEVICE); | |
691 | knav_queue_push(pool->queue, dma_addr, dma_size, 0); | |
692 | } | |
693 | } | |
694 | ||
695 | /* pop out descriptors and close the queue */ | |
696 | static void kdesc_empty_pool(struct knav_pool *pool) | |
697 | { | |
698 | dma_addr_t dma; | |
699 | unsigned size; | |
700 | void *desc; | |
701 | int i; | |
702 | ||
703 | if (!pool->queue) | |
704 | return; | |
705 | ||
706 | for (i = 0;; i++) { | |
707 | dma = knav_queue_pop(pool->queue, &size); | |
708 | if (!dma) | |
709 | break; | |
710 | desc = knav_pool_desc_dma_to_virt(pool, dma); | |
711 | if (!desc) { | |
712 | dev_dbg(pool->kdev->dev, | |
713 | "couldn't unmap desc, continuing\n"); | |
714 | continue; | |
715 | } | |
716 | } | |
717 | WARN_ON(i != pool->num_desc); | |
718 | knav_queue_close(pool->queue); | |
719 | } | |
720 | ||
721 | ||
722 | /* Get the DMA address of a descriptor */ | |
723 | dma_addr_t knav_pool_desc_virt_to_dma(void *ph, void *virt) | |
724 | { | |
725 | struct knav_pool *pool = ph; | |
726 | return pool->region->dma_start + (virt - pool->region->virt_start); | |
727 | } | |
97f39af4 | 728 | EXPORT_SYMBOL_GPL(knav_pool_desc_virt_to_dma); |
41f93af9 SN |
729 | |
730 | void *knav_pool_desc_dma_to_virt(void *ph, dma_addr_t dma) | |
731 | { | |
732 | struct knav_pool *pool = ph; | |
733 | return pool->region->virt_start + (dma - pool->region->dma_start); | |
734 | } | |
97f39af4 | 735 | EXPORT_SYMBOL_GPL(knav_pool_desc_dma_to_virt); |
41f93af9 SN |
736 | |
737 | /** | |
738 | * knav_pool_create() - Create a pool of descriptors | |
739 | * @name - name to give the pool handle | |
740 | * @num_desc - numbers of descriptors in the pool | |
741 | * @region_id - QMSS region id from which the descriptors are to be | |
742 | * allocated. | |
743 | * | |
744 | * Returns a pool handle on success. | |
745 | * Use IS_ERR_OR_NULL() to identify error values on return. | |
746 | */ | |
747 | void *knav_pool_create(const char *name, | |
748 | int num_desc, int region_id) | |
749 | { | |
750 | struct knav_region *reg_itr, *region = NULL; | |
751 | struct knav_pool *pool, *pi; | |
752 | struct list_head *node; | |
753 | unsigned last_offset; | |
754 | bool slot_found; | |
755 | int ret; | |
756 | ||
757 | if (!kdev->dev) | |
758 | return ERR_PTR(-ENODEV); | |
759 | ||
760 | pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL); | |
761 | if (!pool) { | |
762 | dev_err(kdev->dev, "out of memory allocating pool\n"); | |
763 | return ERR_PTR(-ENOMEM); | |
764 | } | |
765 | ||
766 | for_each_region(kdev, reg_itr) { | |
767 | if (reg_itr->id != region_id) | |
768 | continue; | |
769 | region = reg_itr; | |
770 | break; | |
771 | } | |
772 | ||
773 | if (!region) { | |
774 | dev_err(kdev->dev, "region-id(%d) not found\n", region_id); | |
775 | ret = -EINVAL; | |
776 | goto err; | |
777 | } | |
778 | ||
779 | pool->queue = knav_queue_open(name, KNAV_QUEUE_GP, 0); | |
780 | if (IS_ERR_OR_NULL(pool->queue)) { | |
781 | dev_err(kdev->dev, | |
782 | "failed to open queue for pool(%s), error %ld\n", | |
783 | name, PTR_ERR(pool->queue)); | |
784 | ret = PTR_ERR(pool->queue); | |
785 | goto err; | |
786 | } | |
787 | ||
788 | pool->name = kstrndup(name, KNAV_NAME_SIZE, GFP_KERNEL); | |
789 | pool->kdev = kdev; | |
790 | pool->dev = kdev->dev; | |
791 | ||
792 | mutex_lock(&knav_dev_lock); | |
793 | ||
794 | if (num_desc > (region->num_desc - region->used_desc)) { | |
795 | dev_err(kdev->dev, "out of descs in region(%d) for pool(%s)\n", | |
796 | region_id, name); | |
797 | ret = -ENOMEM; | |
ea6d4c07 | 798 | goto err_unlock; |
41f93af9 SN |
799 | } |
800 | ||
801 | /* Region maintains a sorted (by region offset) list of pools | |
802 | * use the first free slot which is large enough to accomodate | |
803 | * the request | |
804 | */ | |
805 | last_offset = 0; | |
806 | slot_found = false; | |
807 | node = ®ion->pools; | |
808 | list_for_each_entry(pi, ®ion->pools, region_inst) { | |
809 | if ((pi->region_offset - last_offset) >= num_desc) { | |
810 | slot_found = true; | |
811 | break; | |
812 | } | |
813 | last_offset = pi->region_offset + pi->num_desc; | |
814 | } | |
815 | node = &pi->region_inst; | |
816 | ||
817 | if (slot_found) { | |
818 | pool->region = region; | |
819 | pool->num_desc = num_desc; | |
820 | pool->region_offset = last_offset; | |
821 | region->used_desc += num_desc; | |
822 | list_add_tail(&pool->list, &kdev->pools); | |
823 | list_add_tail(&pool->region_inst, node); | |
824 | } else { | |
825 | dev_err(kdev->dev, "pool(%s) create failed: fragmented desc pool in region(%d)\n", | |
826 | name, region_id); | |
827 | ret = -ENOMEM; | |
ea6d4c07 | 828 | goto err_unlock; |
41f93af9 SN |
829 | } |
830 | ||
831 | mutex_unlock(&knav_dev_lock); | |
832 | kdesc_fill_pool(pool); | |
833 | return pool; | |
834 | ||
ea6d4c07 | 835 | err_unlock: |
41f93af9 | 836 | mutex_unlock(&knav_dev_lock); |
ea6d4c07 | 837 | err: |
41f93af9 SN |
838 | kfree(pool->name); |
839 | devm_kfree(kdev->dev, pool); | |
840 | return ERR_PTR(ret); | |
841 | } | |
842 | EXPORT_SYMBOL_GPL(knav_pool_create); | |
843 | ||
844 | /** | |
845 | * knav_pool_destroy() - Free a pool of descriptors | |
846 | * @pool - pool handle | |
847 | */ | |
848 | void knav_pool_destroy(void *ph) | |
849 | { | |
850 | struct knav_pool *pool = ph; | |
851 | ||
852 | if (!pool) | |
853 | return; | |
854 | ||
855 | if (!pool->region) | |
856 | return; | |
857 | ||
858 | kdesc_empty_pool(pool); | |
859 | mutex_lock(&knav_dev_lock); | |
860 | ||
861 | pool->region->used_desc -= pool->num_desc; | |
862 | list_del(&pool->region_inst); | |
863 | list_del(&pool->list); | |
864 | ||
865 | mutex_unlock(&knav_dev_lock); | |
866 | kfree(pool->name); | |
867 | devm_kfree(kdev->dev, pool); | |
868 | } | |
869 | EXPORT_SYMBOL_GPL(knav_pool_destroy); | |
870 | ||
871 | ||
872 | /** | |
873 | * knav_pool_desc_get() - Get a descriptor from the pool | |
874 | * @pool - pool handle | |
875 | * | |
876 | * Returns descriptor from the pool. | |
877 | */ | |
878 | void *knav_pool_desc_get(void *ph) | |
879 | { | |
880 | struct knav_pool *pool = ph; | |
881 | dma_addr_t dma; | |
882 | unsigned size; | |
883 | void *data; | |
884 | ||
885 | dma = knav_queue_pop(pool->queue, &size); | |
886 | if (unlikely(!dma)) | |
887 | return ERR_PTR(-ENOMEM); | |
888 | data = knav_pool_desc_dma_to_virt(pool, dma); | |
889 | return data; | |
890 | } | |
97f39af4 | 891 | EXPORT_SYMBOL_GPL(knav_pool_desc_get); |
41f93af9 SN |
892 | |
893 | /** | |
894 | * knav_pool_desc_put() - return a descriptor to the pool | |
895 | * @pool - pool handle | |
896 | */ | |
897 | void knav_pool_desc_put(void *ph, void *desc) | |
898 | { | |
899 | struct knav_pool *pool = ph; | |
900 | dma_addr_t dma; | |
901 | dma = knav_pool_desc_virt_to_dma(pool, desc); | |
902 | knav_queue_push(pool->queue, dma, pool->region->desc_size, 0); | |
903 | } | |
97f39af4 | 904 | EXPORT_SYMBOL_GPL(knav_pool_desc_put); |
41f93af9 SN |
905 | |
906 | /** | |
907 | * knav_pool_desc_map() - Map descriptor for DMA transfer | |
908 | * @pool - pool handle | |
909 | * @desc - address of descriptor to map | |
910 | * @size - size of descriptor to map | |
911 | * @dma - DMA address return pointer | |
912 | * @dma_sz - adjusted return pointer | |
913 | * | |
914 | * Returns 0 on success, errno otherwise. | |
915 | */ | |
916 | int knav_pool_desc_map(void *ph, void *desc, unsigned size, | |
917 | dma_addr_t *dma, unsigned *dma_sz) | |
918 | { | |
919 | struct knav_pool *pool = ph; | |
920 | *dma = knav_pool_desc_virt_to_dma(pool, desc); | |
921 | size = min(size, pool->region->desc_size); | |
922 | size = ALIGN(size, SMP_CACHE_BYTES); | |
923 | *dma_sz = size; | |
924 | dma_sync_single_for_device(pool->dev, *dma, size, DMA_TO_DEVICE); | |
925 | ||
926 | /* Ensure the descriptor reaches to the memory */ | |
927 | __iowmb(); | |
928 | ||
929 | return 0; | |
930 | } | |
97f39af4 | 931 | EXPORT_SYMBOL_GPL(knav_pool_desc_map); |
41f93af9 SN |
932 | |
933 | /** | |
934 | * knav_pool_desc_unmap() - Unmap descriptor after DMA transfer | |
935 | * @pool - pool handle | |
936 | * @dma - DMA address of descriptor to unmap | |
937 | * @dma_sz - size of descriptor to unmap | |
938 | * | |
939 | * Returns descriptor address on success, Use IS_ERR_OR_NULL() to identify | |
940 | * error values on return. | |
941 | */ | |
942 | void *knav_pool_desc_unmap(void *ph, dma_addr_t dma, unsigned dma_sz) | |
943 | { | |
944 | struct knav_pool *pool = ph; | |
945 | unsigned desc_sz; | |
946 | void *desc; | |
947 | ||
948 | desc_sz = min(dma_sz, pool->region->desc_size); | |
949 | desc = knav_pool_desc_dma_to_virt(pool, dma); | |
950 | dma_sync_single_for_cpu(pool->dev, dma, desc_sz, DMA_FROM_DEVICE); | |
951 | prefetch(desc); | |
952 | return desc; | |
953 | } | |
97f39af4 | 954 | EXPORT_SYMBOL_GPL(knav_pool_desc_unmap); |
41f93af9 SN |
955 | |
956 | /** | |
957 | * knav_pool_count() - Get the number of descriptors in pool. | |
958 | * @pool - pool handle | |
959 | * Returns number of elements in the pool. | |
960 | */ | |
961 | int knav_pool_count(void *ph) | |
962 | { | |
963 | struct knav_pool *pool = ph; | |
964 | return knav_queue_get_count(pool->queue); | |
965 | } | |
97f39af4 | 966 | EXPORT_SYMBOL_GPL(knav_pool_count); |
41f93af9 SN |
967 | |
968 | static void knav_queue_setup_region(struct knav_device *kdev, | |
969 | struct knav_region *region) | |
970 | { | |
971 | unsigned hw_num_desc, hw_desc_size, size; | |
972 | struct knav_reg_region __iomem *regs; | |
973 | struct knav_qmgr_info *qmgr; | |
974 | struct knav_pool *pool; | |
975 | int id = region->id; | |
976 | struct page *page; | |
977 | ||
978 | /* unused region? */ | |
979 | if (!region->num_desc) { | |
980 | dev_warn(kdev->dev, "unused region %s\n", region->name); | |
981 | return; | |
982 | } | |
983 | ||
984 | /* get hardware descriptor value */ | |
985 | hw_num_desc = ilog2(region->num_desc - 1) + 1; | |
986 | ||
987 | /* did we force fit ourselves into nothingness? */ | |
988 | if (region->num_desc < 32) { | |
989 | region->num_desc = 0; | |
990 | dev_warn(kdev->dev, "too few descriptors in region %s\n", | |
991 | region->name); | |
992 | return; | |
993 | } | |
994 | ||
995 | size = region->num_desc * region->desc_size; | |
996 | region->virt_start = alloc_pages_exact(size, GFP_KERNEL | GFP_DMA | | |
997 | GFP_DMA32); | |
998 | if (!region->virt_start) { | |
999 | region->num_desc = 0; | |
1000 | dev_err(kdev->dev, "memory alloc failed for region %s\n", | |
1001 | region->name); | |
1002 | return; | |
1003 | } | |
1004 | region->virt_end = region->virt_start + size; | |
1005 | page = virt_to_page(region->virt_start); | |
1006 | ||
1007 | region->dma_start = dma_map_page(kdev->dev, page, 0, size, | |
1008 | DMA_BIDIRECTIONAL); | |
1009 | if (dma_mapping_error(kdev->dev, region->dma_start)) { | |
1010 | dev_err(kdev->dev, "dma map failed for region %s\n", | |
1011 | region->name); | |
1012 | goto fail; | |
1013 | } | |
1014 | region->dma_end = region->dma_start + size; | |
1015 | ||
1016 | pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL); | |
1017 | if (!pool) { | |
1018 | dev_err(kdev->dev, "out of memory allocating dummy pool\n"); | |
1019 | goto fail; | |
1020 | } | |
1021 | pool->num_desc = 0; | |
1022 | pool->region_offset = region->num_desc; | |
1023 | list_add(&pool->region_inst, ®ion->pools); | |
1024 | ||
1025 | dev_dbg(kdev->dev, | |
cc0336ec | 1026 | "region %s (%d): size:%d, link:%d@%d, dma:%pad-%pad, virt:%p-%p\n", |
41f93af9 | 1027 | region->name, id, region->desc_size, region->num_desc, |
cc0336ec | 1028 | region->link_index, ®ion->dma_start, ®ion->dma_end, |
41f93af9 SN |
1029 | region->virt_start, region->virt_end); |
1030 | ||
1031 | hw_desc_size = (region->desc_size / 16) - 1; | |
1032 | hw_num_desc -= 5; | |
1033 | ||
1034 | for_each_qmgr(kdev, qmgr) { | |
1035 | regs = qmgr->reg_region + id; | |
cc0336ec | 1036 | writel_relaxed((u32)region->dma_start, ®s->base); |
41f93af9 SN |
1037 | writel_relaxed(region->link_index, ®s->start_index); |
1038 | writel_relaxed(hw_desc_size << 16 | hw_num_desc, | |
1039 | ®s->size_count); | |
1040 | } | |
1041 | return; | |
1042 | ||
1043 | fail: | |
1044 | if (region->dma_start) | |
1045 | dma_unmap_page(kdev->dev, region->dma_start, size, | |
1046 | DMA_BIDIRECTIONAL); | |
1047 | if (region->virt_start) | |
1048 | free_pages_exact(region->virt_start, size); | |
1049 | region->num_desc = 0; | |
1050 | return; | |
1051 | } | |
1052 | ||
1053 | static const char *knav_queue_find_name(struct device_node *node) | |
1054 | { | |
1055 | const char *name; | |
1056 | ||
1057 | if (of_property_read_string(node, "label", &name) < 0) | |
1058 | name = node->name; | |
1059 | if (!name) | |
1060 | name = "unknown"; | |
1061 | return name; | |
1062 | } | |
1063 | ||
1064 | static int knav_queue_setup_regions(struct knav_device *kdev, | |
1065 | struct device_node *regions) | |
1066 | { | |
1067 | struct device *dev = kdev->dev; | |
1068 | struct knav_region *region; | |
1069 | struct device_node *child; | |
1070 | u32 temp[2]; | |
1071 | int ret; | |
1072 | ||
1073 | for_each_child_of_node(regions, child) { | |
1074 | region = devm_kzalloc(dev, sizeof(*region), GFP_KERNEL); | |
1075 | if (!region) { | |
1076 | dev_err(dev, "out of memory allocating region\n"); | |
1077 | return -ENOMEM; | |
1078 | } | |
1079 | ||
1080 | region->name = knav_queue_find_name(child); | |
1081 | of_property_read_u32(child, "id", ®ion->id); | |
1082 | ret = of_property_read_u32_array(child, "region-spec", temp, 2); | |
1083 | if (!ret) { | |
1084 | region->num_desc = temp[0]; | |
1085 | region->desc_size = temp[1]; | |
1086 | } else { | |
1087 | dev_err(dev, "invalid region info %s\n", region->name); | |
1088 | devm_kfree(dev, region); | |
1089 | continue; | |
1090 | } | |
1091 | ||
1092 | if (!of_get_property(child, "link-index", NULL)) { | |
1093 | dev_err(dev, "No link info for %s\n", region->name); | |
1094 | devm_kfree(dev, region); | |
1095 | continue; | |
1096 | } | |
1097 | ret = of_property_read_u32(child, "link-index", | |
1098 | ®ion->link_index); | |
1099 | if (ret) { | |
1100 | dev_err(dev, "link index not found for %s\n", | |
1101 | region->name); | |
1102 | devm_kfree(dev, region); | |
1103 | continue; | |
1104 | } | |
1105 | ||
1106 | INIT_LIST_HEAD(®ion->pools); | |
1107 | list_add_tail(®ion->list, &kdev->regions); | |
1108 | } | |
1109 | if (list_empty(&kdev->regions)) { | |
1110 | dev_err(dev, "no valid region information found\n"); | |
1111 | return -ENODEV; | |
1112 | } | |
1113 | ||
1114 | /* Next, we run through the regions and set things up */ | |
1115 | for_each_region(kdev, region) | |
1116 | knav_queue_setup_region(kdev, region); | |
1117 | ||
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | static int knav_get_link_ram(struct knav_device *kdev, | |
1122 | const char *name, | |
1123 | struct knav_link_ram_block *block) | |
1124 | { | |
1125 | struct platform_device *pdev = to_platform_device(kdev->dev); | |
1126 | struct device_node *node = pdev->dev.of_node; | |
1127 | u32 temp[2]; | |
1128 | ||
1129 | /* | |
1130 | * Note: link ram resources are specified in "entry" sized units. In | |
1131 | * reality, although entries are ~40bits in hardware, we treat them as | |
1132 | * 64-bit entities here. | |
1133 | * | |
1134 | * For example, to specify the internal link ram for Keystone-I class | |
1135 | * devices, we would set the linkram0 resource to 0x80000-0x83fff. | |
1136 | * | |
1137 | * This gets a bit weird when other link rams are used. For example, | |
1138 | * if the range specified is 0x0c000000-0x0c003fff (i.e., 16K entries | |
1139 | * in MSMC SRAM), the actual memory used is 0x0c000000-0x0c020000, | |
1140 | * which accounts for 64-bits per entry, for 16K entries. | |
1141 | */ | |
1142 | if (!of_property_read_u32_array(node, name , temp, 2)) { | |
1143 | if (temp[0]) { | |
1144 | /* | |
1145 | * queue_base specified => using internal or onchip | |
1146 | * link ram WARNING - we do not "reserve" this block | |
1147 | */ | |
cc0336ec | 1148 | block->dma = (dma_addr_t)temp[0]; |
41f93af9 SN |
1149 | block->virt = NULL; |
1150 | block->size = temp[1]; | |
1151 | } else { | |
1152 | block->size = temp[1]; | |
1153 | /* queue_base not specific => allocate requested size */ | |
1154 | block->virt = dmam_alloc_coherent(kdev->dev, | |
cc0336ec | 1155 | 8 * block->size, &block->dma, |
41f93af9 SN |
1156 | GFP_KERNEL); |
1157 | if (!block->virt) { | |
1158 | dev_err(kdev->dev, "failed to alloc linkram\n"); | |
1159 | return -ENOMEM; | |
1160 | } | |
1161 | } | |
1162 | } else { | |
1163 | return -ENODEV; | |
1164 | } | |
1165 | return 0; | |
1166 | } | |
1167 | ||
1168 | static int knav_queue_setup_link_ram(struct knav_device *kdev) | |
1169 | { | |
1170 | struct knav_link_ram_block *block; | |
1171 | struct knav_qmgr_info *qmgr; | |
1172 | ||
1173 | for_each_qmgr(kdev, qmgr) { | |
1174 | block = &kdev->link_rams[0]; | |
cc0336ec AB |
1175 | dev_dbg(kdev->dev, "linkram0: dma:%pad, virt:%p, size:%x\n", |
1176 | &block->dma, block->virt, block->size); | |
1177 | writel_relaxed((u32)block->dma, &qmgr->reg_config->link_ram_base0); | |
41f93af9 SN |
1178 | writel_relaxed(block->size, &qmgr->reg_config->link_ram_size0); |
1179 | ||
1180 | block++; | |
1181 | if (!block->size) | |
f7f2bccd | 1182 | continue; |
41f93af9 | 1183 | |
cc0336ec AB |
1184 | dev_dbg(kdev->dev, "linkram1: dma:%pad, virt:%p, size:%x\n", |
1185 | &block->dma, block->virt, block->size); | |
1186 | writel_relaxed(block->dma, &qmgr->reg_config->link_ram_base1); | |
41f93af9 SN |
1187 | } |
1188 | ||
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | static int knav_setup_queue_range(struct knav_device *kdev, | |
1193 | struct device_node *node) | |
1194 | { | |
1195 | struct device *dev = kdev->dev; | |
1196 | struct knav_range_info *range; | |
1197 | struct knav_qmgr_info *qmgr; | |
1198 | u32 temp[2], start, end, id, index; | |
1199 | int ret, i; | |
1200 | ||
1201 | range = devm_kzalloc(dev, sizeof(*range), GFP_KERNEL); | |
1202 | if (!range) { | |
1203 | dev_err(dev, "out of memory allocating range\n"); | |
1204 | return -ENOMEM; | |
1205 | } | |
1206 | ||
1207 | range->kdev = kdev; | |
1208 | range->name = knav_queue_find_name(node); | |
1209 | ret = of_property_read_u32_array(node, "qrange", temp, 2); | |
1210 | if (!ret) { | |
1211 | range->queue_base = temp[0] - kdev->base_id; | |
1212 | range->num_queues = temp[1]; | |
1213 | } else { | |
1214 | dev_err(dev, "invalid queue range %s\n", range->name); | |
1215 | devm_kfree(dev, range); | |
1216 | return -EINVAL; | |
1217 | } | |
1218 | ||
1219 | for (i = 0; i < RANGE_MAX_IRQS; i++) { | |
1220 | struct of_phandle_args oirq; | |
1221 | ||
1222 | if (of_irq_parse_one(node, i, &oirq)) | |
1223 | break; | |
1224 | ||
1225 | range->irqs[i].irq = irq_create_of_mapping(&oirq); | |
1226 | if (range->irqs[i].irq == IRQ_NONE) | |
1227 | break; | |
1228 | ||
1229 | range->num_irqs++; | |
1230 | ||
1231 | if (oirq.args_count == 3) | |
1232 | range->irqs[i].cpu_map = | |
1233 | (oirq.args[2] & 0x0000ff00) >> 8; | |
1234 | } | |
1235 | ||
1236 | range->num_irqs = min(range->num_irqs, range->num_queues); | |
1237 | if (range->num_irqs) | |
1238 | range->flags |= RANGE_HAS_IRQ; | |
1239 | ||
1240 | if (of_get_property(node, "qalloc-by-id", NULL)) | |
1241 | range->flags |= RANGE_RESERVED; | |
1242 | ||
1243 | if (of_get_property(node, "accumulator", NULL)) { | |
1244 | ret = knav_init_acc_range(kdev, node, range); | |
1245 | if (ret < 0) { | |
1246 | devm_kfree(dev, range); | |
1247 | return ret; | |
1248 | } | |
1249 | } else { | |
1250 | range->ops = &knav_gp_range_ops; | |
1251 | } | |
1252 | ||
1253 | /* set threshold to 1, and flush out the queues */ | |
1254 | for_each_qmgr(kdev, qmgr) { | |
1255 | start = max(qmgr->start_queue, range->queue_base); | |
1256 | end = min(qmgr->start_queue + qmgr->num_queues, | |
1257 | range->queue_base + range->num_queues); | |
1258 | for (id = start; id < end; id++) { | |
1259 | index = id - qmgr->start_queue; | |
1260 | writel_relaxed(THRESH_GTE | 1, | |
1261 | &qmgr->reg_peek[index].ptr_size_thresh); | |
1262 | writel_relaxed(0, | |
1263 | &qmgr->reg_push[index].ptr_size_thresh); | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | list_add_tail(&range->list, &kdev->queue_ranges); | |
1268 | dev_dbg(dev, "added range %s: %d-%d, %d irqs%s%s%s\n", | |
1269 | range->name, range->queue_base, | |
1270 | range->queue_base + range->num_queues - 1, | |
1271 | range->num_irqs, | |
1272 | (range->flags & RANGE_HAS_IRQ) ? ", has irq" : "", | |
1273 | (range->flags & RANGE_RESERVED) ? ", reserved" : "", | |
1274 | (range->flags & RANGE_HAS_ACCUMULATOR) ? ", acc" : ""); | |
1275 | kdev->num_queues_in_use += range->num_queues; | |
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | static int knav_setup_queue_pools(struct knav_device *kdev, | |
1280 | struct device_node *queue_pools) | |
1281 | { | |
1282 | struct device_node *type, *range; | |
1283 | int ret; | |
1284 | ||
1285 | for_each_child_of_node(queue_pools, type) { | |
1286 | for_each_child_of_node(type, range) { | |
1287 | ret = knav_setup_queue_range(kdev, range); | |
1288 | /* return value ignored, we init the rest... */ | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | /* ... and barf if they all failed! */ | |
1293 | if (list_empty(&kdev->queue_ranges)) { | |
1294 | dev_err(kdev->dev, "no valid queue range found\n"); | |
1295 | return -ENODEV; | |
1296 | } | |
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | static void knav_free_queue_range(struct knav_device *kdev, | |
1301 | struct knav_range_info *range) | |
1302 | { | |
1303 | if (range->ops && range->ops->free_range) | |
1304 | range->ops->free_range(range); | |
1305 | list_del(&range->list); | |
1306 | devm_kfree(kdev->dev, range); | |
1307 | } | |
1308 | ||
1309 | static void knav_free_queue_ranges(struct knav_device *kdev) | |
1310 | { | |
1311 | struct knav_range_info *range; | |
1312 | ||
1313 | for (;;) { | |
1314 | range = first_queue_range(kdev); | |
1315 | if (!range) | |
1316 | break; | |
1317 | knav_free_queue_range(kdev, range); | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | static void knav_queue_free_regions(struct knav_device *kdev) | |
1322 | { | |
1323 | struct knav_region *region; | |
148bb043 | 1324 | struct knav_pool *pool, *tmp; |
41f93af9 SN |
1325 | unsigned size; |
1326 | ||
1327 | for (;;) { | |
1328 | region = first_region(kdev); | |
1329 | if (!region) | |
1330 | break; | |
148bb043 | 1331 | list_for_each_entry_safe(pool, tmp, ®ion->pools, region_inst) |
41f93af9 SN |
1332 | knav_pool_destroy(pool); |
1333 | ||
1334 | size = region->virt_end - region->virt_start; | |
1335 | if (size) | |
1336 | free_pages_exact(region->virt_start, size); | |
1337 | list_del(®ion->list); | |
1338 | devm_kfree(kdev->dev, region); | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | static void __iomem *knav_queue_map_reg(struct knav_device *kdev, | |
1343 | struct device_node *node, int index) | |
1344 | { | |
1345 | struct resource res; | |
1346 | void __iomem *regs; | |
1347 | int ret; | |
1348 | ||
1349 | ret = of_address_to_resource(node, index, &res); | |
1350 | if (ret) { | |
1351 | dev_err(kdev->dev, "Can't translate of node(%s) address for index(%d)\n", | |
1352 | node->name, index); | |
1353 | return ERR_PTR(ret); | |
1354 | } | |
1355 | ||
1356 | regs = devm_ioremap_resource(kdev->dev, &res); | |
1357 | if (IS_ERR(regs)) | |
1358 | dev_err(kdev->dev, "Failed to map register base for index(%d) node(%s)\n", | |
1359 | index, node->name); | |
1360 | return regs; | |
1361 | } | |
1362 | ||
1363 | static int knav_queue_init_qmgrs(struct knav_device *kdev, | |
1364 | struct device_node *qmgrs) | |
1365 | { | |
1366 | struct device *dev = kdev->dev; | |
1367 | struct knav_qmgr_info *qmgr; | |
1368 | struct device_node *child; | |
1369 | u32 temp[2]; | |
1370 | int ret; | |
1371 | ||
1372 | for_each_child_of_node(qmgrs, child) { | |
1373 | qmgr = devm_kzalloc(dev, sizeof(*qmgr), GFP_KERNEL); | |
1374 | if (!qmgr) { | |
1375 | dev_err(dev, "out of memory allocating qmgr\n"); | |
1376 | return -ENOMEM; | |
1377 | } | |
1378 | ||
1379 | ret = of_property_read_u32_array(child, "managed-queues", | |
1380 | temp, 2); | |
1381 | if (!ret) { | |
1382 | qmgr->start_queue = temp[0]; | |
1383 | qmgr->num_queues = temp[1]; | |
1384 | } else { | |
1385 | dev_err(dev, "invalid qmgr queue range\n"); | |
1386 | devm_kfree(dev, qmgr); | |
1387 | continue; | |
1388 | } | |
1389 | ||
1390 | dev_info(dev, "qmgr start queue %d, number of queues %d\n", | |
1391 | qmgr->start_queue, qmgr->num_queues); | |
1392 | ||
1393 | qmgr->reg_peek = | |
1394 | knav_queue_map_reg(kdev, child, | |
1395 | KNAV_QUEUE_PEEK_REG_INDEX); | |
1396 | qmgr->reg_status = | |
1397 | knav_queue_map_reg(kdev, child, | |
1398 | KNAV_QUEUE_STATUS_REG_INDEX); | |
1399 | qmgr->reg_config = | |
1400 | knav_queue_map_reg(kdev, child, | |
1401 | KNAV_QUEUE_CONFIG_REG_INDEX); | |
1402 | qmgr->reg_region = | |
1403 | knav_queue_map_reg(kdev, child, | |
1404 | KNAV_QUEUE_REGION_REG_INDEX); | |
1405 | qmgr->reg_push = | |
1406 | knav_queue_map_reg(kdev, child, | |
1407 | KNAV_QUEUE_PUSH_REG_INDEX); | |
1408 | qmgr->reg_pop = | |
1409 | knav_queue_map_reg(kdev, child, | |
1410 | KNAV_QUEUE_POP_REG_INDEX); | |
1411 | ||
1412 | if (IS_ERR(qmgr->reg_peek) || IS_ERR(qmgr->reg_status) || | |
1413 | IS_ERR(qmgr->reg_config) || IS_ERR(qmgr->reg_region) || | |
1414 | IS_ERR(qmgr->reg_push) || IS_ERR(qmgr->reg_pop)) { | |
1415 | dev_err(dev, "failed to map qmgr regs\n"); | |
1416 | if (!IS_ERR(qmgr->reg_peek)) | |
1417 | devm_iounmap(dev, qmgr->reg_peek); | |
1418 | if (!IS_ERR(qmgr->reg_status)) | |
1419 | devm_iounmap(dev, qmgr->reg_status); | |
1420 | if (!IS_ERR(qmgr->reg_config)) | |
1421 | devm_iounmap(dev, qmgr->reg_config); | |
1422 | if (!IS_ERR(qmgr->reg_region)) | |
1423 | devm_iounmap(dev, qmgr->reg_region); | |
1424 | if (!IS_ERR(qmgr->reg_push)) | |
1425 | devm_iounmap(dev, qmgr->reg_push); | |
1426 | if (!IS_ERR(qmgr->reg_pop)) | |
1427 | devm_iounmap(dev, qmgr->reg_pop); | |
1428 | devm_kfree(dev, qmgr); | |
1429 | continue; | |
1430 | } | |
1431 | ||
1432 | list_add_tail(&qmgr->list, &kdev->qmgrs); | |
1433 | dev_info(dev, "added qmgr start queue %d, num of queues %d, reg_peek %p, reg_status %p, reg_config %p, reg_region %p, reg_push %p, reg_pop %p\n", | |
1434 | qmgr->start_queue, qmgr->num_queues, | |
1435 | qmgr->reg_peek, qmgr->reg_status, | |
1436 | qmgr->reg_config, qmgr->reg_region, | |
1437 | qmgr->reg_push, qmgr->reg_pop); | |
1438 | } | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | static int knav_queue_init_pdsps(struct knav_device *kdev, | |
1443 | struct device_node *pdsps) | |
1444 | { | |
1445 | struct device *dev = kdev->dev; | |
1446 | struct knav_pdsp_info *pdsp; | |
1447 | struct device_node *child; | |
41f93af9 SN |
1448 | |
1449 | for_each_child_of_node(pdsps, child) { | |
1450 | pdsp = devm_kzalloc(dev, sizeof(*pdsp), GFP_KERNEL); | |
1451 | if (!pdsp) { | |
1452 | dev_err(dev, "out of memory allocating pdsp\n"); | |
1453 | return -ENOMEM; | |
1454 | } | |
1455 | pdsp->name = knav_queue_find_name(child); | |
41f93af9 SN |
1456 | pdsp->iram = |
1457 | knav_queue_map_reg(kdev, child, | |
1458 | KNAV_QUEUE_PDSP_IRAM_REG_INDEX); | |
1459 | pdsp->regs = | |
1460 | knav_queue_map_reg(kdev, child, | |
1461 | KNAV_QUEUE_PDSP_REGS_REG_INDEX); | |
1462 | pdsp->intd = | |
1463 | knav_queue_map_reg(kdev, child, | |
1464 | KNAV_QUEUE_PDSP_INTD_REG_INDEX); | |
1465 | pdsp->command = | |
1466 | knav_queue_map_reg(kdev, child, | |
1467 | KNAV_QUEUE_PDSP_CMD_REG_INDEX); | |
1468 | ||
1469 | if (IS_ERR(pdsp->command) || IS_ERR(pdsp->iram) || | |
1470 | IS_ERR(pdsp->regs) || IS_ERR(pdsp->intd)) { | |
1471 | dev_err(dev, "failed to map pdsp %s regs\n", | |
1472 | pdsp->name); | |
1473 | if (!IS_ERR(pdsp->command)) | |
1474 | devm_iounmap(dev, pdsp->command); | |
1475 | if (!IS_ERR(pdsp->iram)) | |
1476 | devm_iounmap(dev, pdsp->iram); | |
1477 | if (!IS_ERR(pdsp->regs)) | |
1478 | devm_iounmap(dev, pdsp->regs); | |
1479 | if (!IS_ERR(pdsp->intd)) | |
1480 | devm_iounmap(dev, pdsp->intd); | |
1481 | devm_kfree(dev, pdsp); | |
1482 | continue; | |
1483 | } | |
1484 | of_property_read_u32(child, "id", &pdsp->id); | |
1485 | list_add_tail(&pdsp->list, &kdev->pdsps); | |
96ee19be | 1486 | dev_dbg(dev, "added pdsp %s: command %p, iram %p, regs %p, intd %p\n", |
41f93af9 | 1487 | pdsp->name, pdsp->command, pdsp->iram, pdsp->regs, |
96ee19be | 1488 | pdsp->intd); |
41f93af9 SN |
1489 | } |
1490 | return 0; | |
1491 | } | |
1492 | ||
1493 | static int knav_queue_stop_pdsp(struct knav_device *kdev, | |
1494 | struct knav_pdsp_info *pdsp) | |
1495 | { | |
1496 | u32 val, timeout = 1000; | |
1497 | int ret; | |
1498 | ||
1499 | val = readl_relaxed(&pdsp->regs->control) & ~PDSP_CTRL_ENABLE; | |
1500 | writel_relaxed(val, &pdsp->regs->control); | |
1501 | ret = knav_queue_pdsp_wait(&pdsp->regs->control, timeout, | |
1502 | PDSP_CTRL_RUNNING); | |
1503 | if (ret < 0) { | |
1504 | dev_err(kdev->dev, "timed out on pdsp %s stop\n", pdsp->name); | |
1505 | return ret; | |
1506 | } | |
04501690 MK |
1507 | pdsp->loaded = false; |
1508 | pdsp->started = false; | |
41f93af9 SN |
1509 | return 0; |
1510 | } | |
1511 | ||
1512 | static int knav_queue_load_pdsp(struct knav_device *kdev, | |
1513 | struct knav_pdsp_info *pdsp) | |
1514 | { | |
1515 | int i, ret, fwlen; | |
1516 | const struct firmware *fw; | |
96ee19be | 1517 | bool found = false; |
41f93af9 SN |
1518 | u32 *fwdata; |
1519 | ||
96ee19be MK |
1520 | for (i = 0; i < ARRAY_SIZE(knav_acc_firmwares); i++) { |
1521 | if (knav_acc_firmwares[i]) { | |
6af1a073 MK |
1522 | ret = request_firmware_direct(&fw, |
1523 | knav_acc_firmwares[i], | |
1524 | kdev->dev); | |
96ee19be MK |
1525 | if (!ret) { |
1526 | found = true; | |
1527 | break; | |
1528 | } | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | if (!found) { | |
1533 | dev_err(kdev->dev, "failed to get firmware for pdsp\n"); | |
1534 | return -ENODEV; | |
41f93af9 | 1535 | } |
96ee19be MK |
1536 | |
1537 | dev_info(kdev->dev, "firmware file %s downloaded for PDSP\n", | |
1538 | knav_acc_firmwares[i]); | |
1539 | ||
41f93af9 SN |
1540 | writel_relaxed(pdsp->id + 1, pdsp->command + 0x18); |
1541 | /* download the firmware */ | |
1542 | fwdata = (u32 *)fw->data; | |
1543 | fwlen = (fw->size + sizeof(u32) - 1) / sizeof(u32); | |
1544 | for (i = 0; i < fwlen; i++) | |
1545 | writel_relaxed(be32_to_cpu(fwdata[i]), pdsp->iram + i); | |
1546 | ||
1547 | release_firmware(fw); | |
1548 | return 0; | |
1549 | } | |
1550 | ||
1551 | static int knav_queue_start_pdsp(struct knav_device *kdev, | |
1552 | struct knav_pdsp_info *pdsp) | |
1553 | { | |
1554 | u32 val, timeout = 1000; | |
1555 | int ret; | |
1556 | ||
1557 | /* write a command for sync */ | |
1558 | writel_relaxed(0xffffffff, pdsp->command); | |
1559 | while (readl_relaxed(pdsp->command) != 0xffffffff) | |
1560 | cpu_relax(); | |
1561 | ||
1562 | /* soft reset the PDSP */ | |
1563 | val = readl_relaxed(&pdsp->regs->control); | |
1564 | val &= ~(PDSP_CTRL_PC_MASK | PDSP_CTRL_SOFT_RESET); | |
1565 | writel_relaxed(val, &pdsp->regs->control); | |
1566 | ||
1567 | /* enable pdsp */ | |
1568 | val = readl_relaxed(&pdsp->regs->control) | PDSP_CTRL_ENABLE; | |
1569 | writel_relaxed(val, &pdsp->regs->control); | |
1570 | ||
1571 | /* wait for command register to clear */ | |
1572 | ret = knav_queue_pdsp_wait(pdsp->command, timeout, 0); | |
1573 | if (ret < 0) { | |
1574 | dev_err(kdev->dev, | |
1575 | "timed out on pdsp %s command register wait\n", | |
1576 | pdsp->name); | |
1577 | return ret; | |
1578 | } | |
1579 | return 0; | |
1580 | } | |
1581 | ||
1582 | static void knav_queue_stop_pdsps(struct knav_device *kdev) | |
1583 | { | |
1584 | struct knav_pdsp_info *pdsp; | |
1585 | ||
1586 | /* disable all pdsps */ | |
1587 | for_each_pdsp(kdev, pdsp) | |
1588 | knav_queue_stop_pdsp(kdev, pdsp); | |
1589 | } | |
1590 | ||
1591 | static int knav_queue_start_pdsps(struct knav_device *kdev) | |
1592 | { | |
1593 | struct knav_pdsp_info *pdsp; | |
1594 | int ret; | |
1595 | ||
1596 | knav_queue_stop_pdsps(kdev); | |
04501690 MK |
1597 | /* now load them all. We return success even if pdsp |
1598 | * is not loaded as acc channels are optional on having | |
1599 | * firmware availability in the system. We set the loaded | |
1600 | * and stated flag and when initialize the acc range, check | |
1601 | * it and init the range only if pdsp is started. | |
1602 | */ | |
41f93af9 SN |
1603 | for_each_pdsp(kdev, pdsp) { |
1604 | ret = knav_queue_load_pdsp(kdev, pdsp); | |
04501690 MK |
1605 | if (!ret) |
1606 | pdsp->loaded = true; | |
41f93af9 SN |
1607 | } |
1608 | ||
1609 | for_each_pdsp(kdev, pdsp) { | |
04501690 MK |
1610 | if (pdsp->loaded) { |
1611 | ret = knav_queue_start_pdsp(kdev, pdsp); | |
1612 | if (!ret) | |
1613 | pdsp->started = true; | |
1614 | } | |
41f93af9 SN |
1615 | } |
1616 | return 0; | |
1617 | } | |
1618 | ||
1619 | static inline struct knav_qmgr_info *knav_find_qmgr(unsigned id) | |
1620 | { | |
1621 | struct knav_qmgr_info *qmgr; | |
1622 | ||
1623 | for_each_qmgr(kdev, qmgr) { | |
1624 | if ((id >= qmgr->start_queue) && | |
1625 | (id < qmgr->start_queue + qmgr->num_queues)) | |
1626 | return qmgr; | |
1627 | } | |
1628 | return NULL; | |
1629 | } | |
1630 | ||
1631 | static int knav_queue_init_queue(struct knav_device *kdev, | |
1632 | struct knav_range_info *range, | |
1633 | struct knav_queue_inst *inst, | |
1634 | unsigned id) | |
1635 | { | |
1636 | char irq_name[KNAV_NAME_SIZE]; | |
1637 | inst->qmgr = knav_find_qmgr(id); | |
1638 | if (!inst->qmgr) | |
1639 | return -1; | |
1640 | ||
1641 | INIT_LIST_HEAD(&inst->handles); | |
1642 | inst->kdev = kdev; | |
1643 | inst->range = range; | |
1644 | inst->irq_num = -1; | |
1645 | inst->id = id; | |
1646 | scnprintf(irq_name, sizeof(irq_name), "hwqueue-%d", id); | |
1647 | inst->irq_name = kstrndup(irq_name, sizeof(irq_name), GFP_KERNEL); | |
1648 | ||
1649 | if (range->ops && range->ops->init_queue) | |
1650 | return range->ops->init_queue(range, inst); | |
1651 | else | |
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | static int knav_queue_init_queues(struct knav_device *kdev) | |
1656 | { | |
1657 | struct knav_range_info *range; | |
1658 | int size, id, base_idx; | |
1659 | int idx = 0, ret = 0; | |
1660 | ||
1661 | /* how much do we need for instance data? */ | |
1662 | size = sizeof(struct knav_queue_inst); | |
1663 | ||
1664 | /* round this up to a power of 2, keep the index to instance | |
1665 | * arithmetic fast. | |
1666 | * */ | |
1667 | kdev->inst_shift = order_base_2(size); | |
1668 | size = (1 << kdev->inst_shift) * kdev->num_queues_in_use; | |
1669 | kdev->instances = devm_kzalloc(kdev->dev, size, GFP_KERNEL); | |
1670 | if (!kdev->instances) | |
39179cb5 | 1671 | return -ENOMEM; |
41f93af9 SN |
1672 | |
1673 | for_each_queue_range(kdev, range) { | |
1674 | if (range->ops && range->ops->init_range) | |
1675 | range->ops->init_range(range); | |
1676 | base_idx = idx; | |
1677 | for (id = range->queue_base; | |
1678 | id < range->queue_base + range->num_queues; id++, idx++) { | |
1679 | ret = knav_queue_init_queue(kdev, range, | |
1680 | knav_queue_idx_to_inst(kdev, idx), id); | |
1681 | if (ret < 0) | |
1682 | return ret; | |
1683 | } | |
1684 | range->queue_base_inst = | |
1685 | knav_queue_idx_to_inst(kdev, base_idx); | |
1686 | } | |
1687 | return 0; | |
1688 | } | |
1689 | ||
1690 | static int knav_queue_probe(struct platform_device *pdev) | |
1691 | { | |
1692 | struct device_node *node = pdev->dev.of_node; | |
1693 | struct device_node *qmgrs, *queue_pools, *regions, *pdsps; | |
1694 | struct device *dev = &pdev->dev; | |
1695 | u32 temp[2]; | |
1696 | int ret; | |
1697 | ||
1698 | if (!node) { | |
1699 | dev_err(dev, "device tree info unavailable\n"); | |
1700 | return -ENODEV; | |
1701 | } | |
1702 | ||
1703 | kdev = devm_kzalloc(dev, sizeof(struct knav_device), GFP_KERNEL); | |
1704 | if (!kdev) { | |
1705 | dev_err(dev, "memory allocation failed\n"); | |
1706 | return -ENOMEM; | |
1707 | } | |
1708 | ||
1709 | platform_set_drvdata(pdev, kdev); | |
1710 | kdev->dev = dev; | |
1711 | INIT_LIST_HEAD(&kdev->queue_ranges); | |
1712 | INIT_LIST_HEAD(&kdev->qmgrs); | |
1713 | INIT_LIST_HEAD(&kdev->pools); | |
1714 | INIT_LIST_HEAD(&kdev->regions); | |
1715 | INIT_LIST_HEAD(&kdev->pdsps); | |
1716 | ||
1717 | pm_runtime_enable(&pdev->dev); | |
1718 | ret = pm_runtime_get_sync(&pdev->dev); | |
1719 | if (ret < 0) { | |
1720 | dev_err(dev, "Failed to enable QMSS\n"); | |
1721 | return ret; | |
1722 | } | |
1723 | ||
1724 | if (of_property_read_u32_array(node, "queue-range", temp, 2)) { | |
1725 | dev_err(dev, "queue-range not specified\n"); | |
1726 | ret = -ENODEV; | |
1727 | goto err; | |
1728 | } | |
1729 | kdev->base_id = temp[0]; | |
1730 | kdev->num_queues = temp[1]; | |
1731 | ||
1732 | /* Initialize queue managers using device tree configuration */ | |
1733 | qmgrs = of_get_child_by_name(node, "qmgrs"); | |
1734 | if (!qmgrs) { | |
1735 | dev_err(dev, "queue manager info not specified\n"); | |
1736 | ret = -ENODEV; | |
1737 | goto err; | |
1738 | } | |
1739 | ret = knav_queue_init_qmgrs(kdev, qmgrs); | |
1740 | of_node_put(qmgrs); | |
1741 | if (ret) | |
1742 | goto err; | |
1743 | ||
1744 | /* get pdsp configuration values from device tree */ | |
1745 | pdsps = of_get_child_by_name(node, "pdsps"); | |
1746 | if (pdsps) { | |
1747 | ret = knav_queue_init_pdsps(kdev, pdsps); | |
1748 | if (ret) | |
1749 | goto err; | |
1750 | ||
1751 | ret = knav_queue_start_pdsps(kdev); | |
1752 | if (ret) | |
1753 | goto err; | |
1754 | } | |
1755 | of_node_put(pdsps); | |
1756 | ||
1757 | /* get usable queue range values from device tree */ | |
1758 | queue_pools = of_get_child_by_name(node, "queue-pools"); | |
1759 | if (!queue_pools) { | |
1760 | dev_err(dev, "queue-pools not specified\n"); | |
1761 | ret = -ENODEV; | |
1762 | goto err; | |
1763 | } | |
1764 | ret = knav_setup_queue_pools(kdev, queue_pools); | |
1765 | of_node_put(queue_pools); | |
1766 | if (ret) | |
1767 | goto err; | |
1768 | ||
1769 | ret = knav_get_link_ram(kdev, "linkram0", &kdev->link_rams[0]); | |
1770 | if (ret) { | |
1771 | dev_err(kdev->dev, "could not setup linking ram\n"); | |
1772 | goto err; | |
1773 | } | |
1774 | ||
1775 | ret = knav_get_link_ram(kdev, "linkram1", &kdev->link_rams[1]); | |
1776 | if (ret) { | |
1777 | /* | |
1778 | * nothing really, we have one linking ram already, so we just | |
1779 | * live within our means | |
1780 | */ | |
1781 | } | |
1782 | ||
1783 | ret = knav_queue_setup_link_ram(kdev); | |
1784 | if (ret) | |
1785 | goto err; | |
1786 | ||
1787 | regions = of_get_child_by_name(node, "descriptor-regions"); | |
1788 | if (!regions) { | |
1789 | dev_err(dev, "descriptor-regions not specified\n"); | |
1790 | goto err; | |
1791 | } | |
1792 | ret = knav_queue_setup_regions(kdev, regions); | |
1793 | of_node_put(regions); | |
1794 | if (ret) | |
1795 | goto err; | |
1796 | ||
1797 | ret = knav_queue_init_queues(kdev); | |
1798 | if (ret < 0) { | |
1799 | dev_err(dev, "hwqueue initialization failed\n"); | |
1800 | goto err; | |
1801 | } | |
1802 | ||
1803 | debugfs_create_file("qmss", S_IFREG | S_IRUGO, NULL, NULL, | |
1804 | &knav_queue_debug_ops); | |
1805 | return 0; | |
1806 | ||
1807 | err: | |
1808 | knav_queue_stop_pdsps(kdev); | |
1809 | knav_queue_free_regions(kdev); | |
1810 | knav_free_queue_ranges(kdev); | |
1811 | pm_runtime_put_sync(&pdev->dev); | |
1812 | pm_runtime_disable(&pdev->dev); | |
1813 | return ret; | |
1814 | } | |
1815 | ||
1816 | static int knav_queue_remove(struct platform_device *pdev) | |
1817 | { | |
1818 | /* TODO: Free resources */ | |
1819 | pm_runtime_put_sync(&pdev->dev); | |
1820 | pm_runtime_disable(&pdev->dev); | |
1821 | return 0; | |
1822 | } | |
1823 | ||
1824 | /* Match table for of_platform binding */ | |
1825 | static struct of_device_id keystone_qmss_of_match[] = { | |
1826 | { .compatible = "ti,keystone-navigator-qmss", }, | |
1827 | {}, | |
1828 | }; | |
1829 | MODULE_DEVICE_TABLE(of, keystone_qmss_of_match); | |
1830 | ||
1831 | static struct platform_driver keystone_qmss_driver = { | |
1832 | .probe = knav_queue_probe, | |
1833 | .remove = knav_queue_remove, | |
1834 | .driver = { | |
1835 | .name = "keystone-navigator-qmss", | |
41f93af9 SN |
1836 | .of_match_table = keystone_qmss_of_match, |
1837 | }, | |
1838 | }; | |
1839 | module_platform_driver(keystone_qmss_driver); | |
1840 | ||
1841 | MODULE_LICENSE("GPL v2"); | |
1842 | MODULE_DESCRIPTION("TI QMSS driver for Keystone SOCs"); | |
1843 | MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com>"); | |
1844 | MODULE_AUTHOR("Santosh Shilimkar <santosh.shilimkar@ti.com>"); |