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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 | ||
71 | /** | |
72 | * knav_queue_notify: qmss queue notfier call | |
73 | * | |
74 | * @inst: qmss queue instance like accumulator | |
75 | */ | |
76 | void knav_queue_notify(struct knav_queue_inst *inst) | |
77 | { | |
78 | struct knav_queue *qh; | |
79 | ||
80 | if (!inst) | |
81 | return; | |
82 | ||
83 | rcu_read_lock(); | |
84 | for_each_handle_rcu(qh, inst) { | |
85 | if (atomic_read(&qh->notifier_enabled) <= 0) | |
86 | continue; | |
87 | if (WARN_ON(!qh->notifier_fn)) | |
88 | continue; | |
89 | atomic_inc(&qh->stats.notifies); | |
90 | qh->notifier_fn(qh->notifier_fn_arg); | |
91 | } | |
92 | rcu_read_unlock(); | |
93 | } | |
94 | EXPORT_SYMBOL_GPL(knav_queue_notify); | |
95 | ||
96 | static irqreturn_t knav_queue_int_handler(int irq, void *_instdata) | |
97 | { | |
98 | struct knav_queue_inst *inst = _instdata; | |
99 | ||
100 | knav_queue_notify(inst); | |
101 | return IRQ_HANDLED; | |
102 | } | |
103 | ||
104 | static int knav_queue_setup_irq(struct knav_range_info *range, | |
105 | struct knav_queue_inst *inst) | |
106 | { | |
107 | unsigned queue = inst->id - range->queue_base; | |
108 | unsigned long cpu_map; | |
109 | int ret = 0, irq; | |
110 | ||
111 | if (range->flags & RANGE_HAS_IRQ) { | |
112 | irq = range->irqs[queue].irq; | |
113 | cpu_map = range->irqs[queue].cpu_map; | |
114 | ret = request_irq(irq, knav_queue_int_handler, 0, | |
115 | inst->irq_name, inst); | |
116 | if (ret) | |
117 | return ret; | |
118 | disable_irq(irq); | |
119 | if (cpu_map) { | |
120 | ret = irq_set_affinity_hint(irq, to_cpumask(&cpu_map)); | |
121 | if (ret) { | |
122 | dev_warn(range->kdev->dev, | |
123 | "Failed to set IRQ affinity\n"); | |
124 | return ret; | |
125 | } | |
126 | } | |
127 | } | |
128 | return ret; | |
129 | } | |
130 | ||
131 | static void knav_queue_free_irq(struct knav_queue_inst *inst) | |
132 | { | |
133 | struct knav_range_info *range = inst->range; | |
134 | unsigned queue = inst->id - inst->range->queue_base; | |
135 | int irq; | |
136 | ||
137 | if (range->flags & RANGE_HAS_IRQ) { | |
138 | irq = range->irqs[queue].irq; | |
139 | irq_set_affinity_hint(irq, NULL); | |
140 | free_irq(irq, inst); | |
141 | } | |
142 | } | |
143 | ||
144 | static inline bool knav_queue_is_busy(struct knav_queue_inst *inst) | |
145 | { | |
146 | return !list_empty(&inst->handles); | |
147 | } | |
148 | ||
149 | static inline bool knav_queue_is_reserved(struct knav_queue_inst *inst) | |
150 | { | |
151 | return inst->range->flags & RANGE_RESERVED; | |
152 | } | |
153 | ||
154 | static inline bool knav_queue_is_shared(struct knav_queue_inst *inst) | |
155 | { | |
156 | struct knav_queue *tmp; | |
157 | ||
158 | rcu_read_lock(); | |
159 | for_each_handle_rcu(tmp, inst) { | |
160 | if (tmp->flags & KNAV_QUEUE_SHARED) { | |
161 | rcu_read_unlock(); | |
162 | return true; | |
163 | } | |
164 | } | |
165 | rcu_read_unlock(); | |
166 | return false; | |
167 | } | |
168 | ||
169 | static inline bool knav_queue_match_type(struct knav_queue_inst *inst, | |
170 | unsigned type) | |
171 | { | |
172 | if ((type == KNAV_QUEUE_QPEND) && | |
173 | (inst->range->flags & RANGE_HAS_IRQ)) { | |
174 | return true; | |
175 | } else if ((type == KNAV_QUEUE_ACC) && | |
176 | (inst->range->flags & RANGE_HAS_ACCUMULATOR)) { | |
177 | return true; | |
178 | } else if ((type == KNAV_QUEUE_GP) && | |
179 | !(inst->range->flags & | |
180 | (RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ))) { | |
181 | return true; | |
182 | } | |
183 | return false; | |
184 | } | |
185 | ||
186 | static inline struct knav_queue_inst * | |
187 | knav_queue_match_id_to_inst(struct knav_device *kdev, unsigned id) | |
188 | { | |
189 | struct knav_queue_inst *inst; | |
190 | int idx; | |
191 | ||
192 | for_each_instance(idx, inst, kdev) { | |
193 | if (inst->id == id) | |
194 | return inst; | |
195 | } | |
196 | return NULL; | |
197 | } | |
198 | ||
199 | static inline struct knav_queue_inst *knav_queue_find_by_id(int id) | |
200 | { | |
201 | if (kdev->base_id <= id && | |
202 | kdev->base_id + kdev->num_queues > id) { | |
203 | id -= kdev->base_id; | |
204 | return knav_queue_match_id_to_inst(kdev, id); | |
205 | } | |
206 | return NULL; | |
207 | } | |
208 | ||
209 | static struct knav_queue *__knav_queue_open(struct knav_queue_inst *inst, | |
210 | const char *name, unsigned flags) | |
211 | { | |
212 | struct knav_queue *qh; | |
213 | unsigned id; | |
214 | int ret = 0; | |
215 | ||
216 | qh = devm_kzalloc(inst->kdev->dev, sizeof(*qh), GFP_KERNEL); | |
217 | if (!qh) | |
218 | return ERR_PTR(-ENOMEM); | |
219 | ||
220 | qh->flags = flags; | |
221 | qh->inst = inst; | |
222 | id = inst->id - inst->qmgr->start_queue; | |
223 | qh->reg_push = &inst->qmgr->reg_push[id]; | |
224 | qh->reg_pop = &inst->qmgr->reg_pop[id]; | |
225 | qh->reg_peek = &inst->qmgr->reg_peek[id]; | |
226 | ||
227 | /* first opener? */ | |
228 | if (!knav_queue_is_busy(inst)) { | |
229 | struct knav_range_info *range = inst->range; | |
230 | ||
231 | inst->name = kstrndup(name, KNAV_NAME_SIZE, GFP_KERNEL); | |
232 | if (range->ops && range->ops->open_queue) | |
233 | ret = range->ops->open_queue(range, inst, flags); | |
234 | ||
235 | if (ret) { | |
236 | devm_kfree(inst->kdev->dev, qh); | |
237 | return ERR_PTR(ret); | |
238 | } | |
239 | } | |
240 | list_add_tail_rcu(&qh->list, &inst->handles); | |
241 | return qh; | |
242 | } | |
243 | ||
244 | static struct knav_queue * | |
245 | knav_queue_open_by_id(const char *name, unsigned id, unsigned flags) | |
246 | { | |
247 | struct knav_queue_inst *inst; | |
248 | struct knav_queue *qh; | |
249 | ||
250 | mutex_lock(&knav_dev_lock); | |
251 | ||
252 | qh = ERR_PTR(-ENODEV); | |
253 | inst = knav_queue_find_by_id(id); | |
254 | if (!inst) | |
255 | goto unlock_ret; | |
256 | ||
257 | qh = ERR_PTR(-EEXIST); | |
258 | if (!(flags & KNAV_QUEUE_SHARED) && knav_queue_is_busy(inst)) | |
259 | goto unlock_ret; | |
260 | ||
261 | qh = ERR_PTR(-EBUSY); | |
262 | if ((flags & KNAV_QUEUE_SHARED) && | |
263 | (knav_queue_is_busy(inst) && !knav_queue_is_shared(inst))) | |
264 | goto unlock_ret; | |
265 | ||
266 | qh = __knav_queue_open(inst, name, flags); | |
267 | ||
268 | unlock_ret: | |
269 | mutex_unlock(&knav_dev_lock); | |
270 | ||
271 | return qh; | |
272 | } | |
273 | ||
274 | static struct knav_queue *knav_queue_open_by_type(const char *name, | |
275 | unsigned type, unsigned flags) | |
276 | { | |
277 | struct knav_queue_inst *inst; | |
278 | struct knav_queue *qh = ERR_PTR(-EINVAL); | |
279 | int idx; | |
280 | ||
281 | mutex_lock(&knav_dev_lock); | |
282 | ||
283 | for_each_instance(idx, inst, kdev) { | |
284 | if (knav_queue_is_reserved(inst)) | |
285 | continue; | |
286 | if (!knav_queue_match_type(inst, type)) | |
287 | continue; | |
288 | if (knav_queue_is_busy(inst)) | |
289 | continue; | |
290 | qh = __knav_queue_open(inst, name, flags); | |
291 | goto unlock_ret; | |
292 | } | |
293 | ||
294 | unlock_ret: | |
295 | mutex_unlock(&knav_dev_lock); | |
296 | return qh; | |
297 | } | |
298 | ||
299 | static void knav_queue_set_notify(struct knav_queue_inst *inst, bool enabled) | |
300 | { | |
301 | struct knav_range_info *range = inst->range; | |
302 | ||
303 | if (range->ops && range->ops->set_notify) | |
304 | range->ops->set_notify(range, inst, enabled); | |
305 | } | |
306 | ||
307 | static int knav_queue_enable_notifier(struct knav_queue *qh) | |
308 | { | |
309 | struct knav_queue_inst *inst = qh->inst; | |
310 | bool first; | |
311 | ||
312 | if (WARN_ON(!qh->notifier_fn)) | |
313 | return -EINVAL; | |
314 | ||
315 | /* Adjust the per handle notifier count */ | |
316 | first = (atomic_inc_return(&qh->notifier_enabled) == 1); | |
317 | if (!first) | |
318 | return 0; /* nothing to do */ | |
319 | ||
320 | /* Now adjust the per instance notifier count */ | |
321 | first = (atomic_inc_return(&inst->num_notifiers) == 1); | |
322 | if (first) | |
323 | knav_queue_set_notify(inst, true); | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | static int knav_queue_disable_notifier(struct knav_queue *qh) | |
329 | { | |
330 | struct knav_queue_inst *inst = qh->inst; | |
331 | bool last; | |
332 | ||
333 | last = (atomic_dec_return(&qh->notifier_enabled) == 0); | |
334 | if (!last) | |
335 | return 0; /* nothing to do */ | |
336 | ||
337 | last = (atomic_dec_return(&inst->num_notifiers) == 0); | |
338 | if (last) | |
339 | knav_queue_set_notify(inst, false); | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
344 | static int knav_queue_set_notifier(struct knav_queue *qh, | |
345 | struct knav_queue_notify_config *cfg) | |
346 | { | |
347 | knav_queue_notify_fn old_fn = qh->notifier_fn; | |
348 | ||
349 | if (!cfg) | |
350 | return -EINVAL; | |
351 | ||
352 | if (!(qh->inst->range->flags & (RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ))) | |
353 | return -ENOTSUPP; | |
354 | ||
355 | if (!cfg->fn && old_fn) | |
356 | knav_queue_disable_notifier(qh); | |
357 | ||
358 | qh->notifier_fn = cfg->fn; | |
359 | qh->notifier_fn_arg = cfg->fn_arg; | |
360 | ||
361 | if (cfg->fn && !old_fn) | |
362 | knav_queue_enable_notifier(qh); | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
367 | static int knav_gp_set_notify(struct knav_range_info *range, | |
368 | struct knav_queue_inst *inst, | |
369 | bool enabled) | |
370 | { | |
371 | unsigned queue; | |
372 | ||
373 | if (range->flags & RANGE_HAS_IRQ) { | |
374 | queue = inst->id - range->queue_base; | |
375 | if (enabled) | |
376 | enable_irq(range->irqs[queue].irq); | |
377 | else | |
378 | disable_irq_nosync(range->irqs[queue].irq); | |
379 | } | |
380 | return 0; | |
381 | } | |
382 | ||
383 | static int knav_gp_open_queue(struct knav_range_info *range, | |
384 | struct knav_queue_inst *inst, unsigned flags) | |
385 | { | |
386 | return knav_queue_setup_irq(range, inst); | |
387 | } | |
388 | ||
389 | static int knav_gp_close_queue(struct knav_range_info *range, | |
390 | struct knav_queue_inst *inst) | |
391 | { | |
392 | knav_queue_free_irq(inst); | |
393 | return 0; | |
394 | } | |
395 | ||
396 | struct knav_range_ops knav_gp_range_ops = { | |
397 | .set_notify = knav_gp_set_notify, | |
398 | .open_queue = knav_gp_open_queue, | |
399 | .close_queue = knav_gp_close_queue, | |
400 | }; | |
401 | ||
402 | ||
403 | static int knav_queue_get_count(void *qhandle) | |
404 | { | |
405 | struct knav_queue *qh = qhandle; | |
406 | struct knav_queue_inst *inst = qh->inst; | |
407 | ||
408 | return readl_relaxed(&qh->reg_peek[0].entry_count) + | |
409 | atomic_read(&inst->desc_count); | |
410 | } | |
411 | ||
412 | static void knav_queue_debug_show_instance(struct seq_file *s, | |
413 | struct knav_queue_inst *inst) | |
414 | { | |
415 | struct knav_device *kdev = inst->kdev; | |
416 | struct knav_queue *qh; | |
417 | ||
418 | if (!knav_queue_is_busy(inst)) | |
419 | return; | |
420 | ||
421 | seq_printf(s, "\tqueue id %d (%s)\n", | |
422 | kdev->base_id + inst->id, inst->name); | |
423 | for_each_handle_rcu(qh, inst) { | |
424 | seq_printf(s, "\t\thandle %p: ", qh); | |
425 | seq_printf(s, "pushes %8d, ", | |
426 | atomic_read(&qh->stats.pushes)); | |
427 | seq_printf(s, "pops %8d, ", | |
428 | atomic_read(&qh->stats.pops)); | |
429 | seq_printf(s, "count %8d, ", | |
430 | knav_queue_get_count(qh)); | |
431 | seq_printf(s, "notifies %8d, ", | |
432 | atomic_read(&qh->stats.notifies)); | |
433 | seq_printf(s, "push errors %8d, ", | |
434 | atomic_read(&qh->stats.push_errors)); | |
435 | seq_printf(s, "pop errors %8d\n", | |
436 | atomic_read(&qh->stats.pop_errors)); | |
437 | } | |
438 | } | |
439 | ||
440 | static int knav_queue_debug_show(struct seq_file *s, void *v) | |
441 | { | |
442 | struct knav_queue_inst *inst; | |
443 | int idx; | |
444 | ||
445 | mutex_lock(&knav_dev_lock); | |
446 | seq_printf(s, "%s: %u-%u\n", | |
447 | dev_name(kdev->dev), kdev->base_id, | |
448 | kdev->base_id + kdev->num_queues - 1); | |
449 | for_each_instance(idx, inst, kdev) | |
450 | knav_queue_debug_show_instance(s, inst); | |
451 | mutex_unlock(&knav_dev_lock); | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
456 | static int knav_queue_debug_open(struct inode *inode, struct file *file) | |
457 | { | |
458 | return single_open(file, knav_queue_debug_show, NULL); | |
459 | } | |
460 | ||
461 | static const struct file_operations knav_queue_debug_ops = { | |
462 | .open = knav_queue_debug_open, | |
463 | .read = seq_read, | |
464 | .llseek = seq_lseek, | |
465 | .release = single_release, | |
466 | }; | |
467 | ||
468 | static inline int knav_queue_pdsp_wait(u32 * __iomem addr, unsigned timeout, | |
469 | u32 flags) | |
470 | { | |
471 | unsigned long end; | |
472 | u32 val = 0; | |
473 | ||
474 | end = jiffies + msecs_to_jiffies(timeout); | |
475 | while (time_after(end, jiffies)) { | |
476 | val = readl_relaxed(addr); | |
477 | if (flags) | |
478 | val &= flags; | |
479 | if (!val) | |
480 | break; | |
481 | cpu_relax(); | |
482 | } | |
483 | return val ? -ETIMEDOUT : 0; | |
484 | } | |
485 | ||
486 | ||
487 | static int knav_queue_flush(struct knav_queue *qh) | |
488 | { | |
489 | struct knav_queue_inst *inst = qh->inst; | |
490 | unsigned id = inst->id - inst->qmgr->start_queue; | |
491 | ||
492 | atomic_set(&inst->desc_count, 0); | |
493 | writel_relaxed(0, &inst->qmgr->reg_push[id].ptr_size_thresh); | |
494 | return 0; | |
495 | } | |
496 | ||
497 | /** | |
498 | * knav_queue_open() - open a hardware queue | |
499 | * @name - name to give the queue handle | |
500 | * @id - desired queue number if any or specifes the type | |
501 | * of queue | |
502 | * @flags - the following flags are applicable to queues: | |
503 | * KNAV_QUEUE_SHARED - allow the queue to be shared. Queues are | |
504 | * exclusive by default. | |
505 | * Subsequent attempts to open a shared queue should | |
506 | * also have this flag. | |
507 | * | |
508 | * Returns a handle to the open hardware queue if successful. Use IS_ERR() | |
509 | * to check the returned value for error codes. | |
510 | */ | |
511 | void *knav_queue_open(const char *name, unsigned id, | |
512 | unsigned flags) | |
513 | { | |
514 | struct knav_queue *qh = ERR_PTR(-EINVAL); | |
515 | ||
516 | switch (id) { | |
517 | case KNAV_QUEUE_QPEND: | |
518 | case KNAV_QUEUE_ACC: | |
519 | case KNAV_QUEUE_GP: | |
520 | qh = knav_queue_open_by_type(name, id, flags); | |
521 | break; | |
522 | ||
523 | default: | |
524 | qh = knav_queue_open_by_id(name, id, flags); | |
525 | break; | |
526 | } | |
527 | return qh; | |
528 | } | |
529 | EXPORT_SYMBOL_GPL(knav_queue_open); | |
530 | ||
531 | /** | |
532 | * knav_queue_close() - close a hardware queue handle | |
533 | * @qh - handle to close | |
534 | */ | |
535 | void knav_queue_close(void *qhandle) | |
536 | { | |
537 | struct knav_queue *qh = qhandle; | |
538 | struct knav_queue_inst *inst = qh->inst; | |
539 | ||
540 | while (atomic_read(&qh->notifier_enabled) > 0) | |
541 | knav_queue_disable_notifier(qh); | |
542 | ||
543 | mutex_lock(&knav_dev_lock); | |
544 | list_del_rcu(&qh->list); | |
545 | mutex_unlock(&knav_dev_lock); | |
546 | synchronize_rcu(); | |
547 | if (!knav_queue_is_busy(inst)) { | |
548 | struct knav_range_info *range = inst->range; | |
549 | ||
550 | if (range->ops && range->ops->close_queue) | |
551 | range->ops->close_queue(range, inst); | |
552 | } | |
553 | devm_kfree(inst->kdev->dev, qh); | |
554 | } | |
555 | EXPORT_SYMBOL_GPL(knav_queue_close); | |
556 | ||
557 | /** | |
558 | * knav_queue_device_control() - Perform control operations on a queue | |
559 | * @qh - queue handle | |
560 | * @cmd - control commands | |
561 | * @arg - command argument | |
562 | * | |
563 | * Returns 0 on success, errno otherwise. | |
564 | */ | |
565 | int knav_queue_device_control(void *qhandle, enum knav_queue_ctrl_cmd cmd, | |
566 | unsigned long arg) | |
567 | { | |
568 | struct knav_queue *qh = qhandle; | |
569 | struct knav_queue_notify_config *cfg; | |
570 | int ret; | |
571 | ||
572 | switch ((int)cmd) { | |
573 | case KNAV_QUEUE_GET_ID: | |
574 | ret = qh->inst->kdev->base_id + qh->inst->id; | |
575 | break; | |
576 | ||
577 | case KNAV_QUEUE_FLUSH: | |
578 | ret = knav_queue_flush(qh); | |
579 | break; | |
580 | ||
581 | case KNAV_QUEUE_SET_NOTIFIER: | |
582 | cfg = (void *)arg; | |
583 | ret = knav_queue_set_notifier(qh, cfg); | |
584 | break; | |
585 | ||
586 | case KNAV_QUEUE_ENABLE_NOTIFY: | |
587 | ret = knav_queue_enable_notifier(qh); | |
588 | break; | |
589 | ||
590 | case KNAV_QUEUE_DISABLE_NOTIFY: | |
591 | ret = knav_queue_disable_notifier(qh); | |
592 | break; | |
593 | ||
594 | case KNAV_QUEUE_GET_COUNT: | |
595 | ret = knav_queue_get_count(qh); | |
596 | break; | |
597 | ||
598 | default: | |
599 | ret = -ENOTSUPP; | |
600 | break; | |
601 | } | |
602 | return ret; | |
603 | } | |
604 | EXPORT_SYMBOL_GPL(knav_queue_device_control); | |
605 | ||
606 | ||
607 | ||
608 | /** | |
609 | * knav_queue_push() - push data (or descriptor) to the tail of a queue | |
610 | * @qh - hardware queue handle | |
611 | * @data - data to push | |
612 | * @size - size of data to push | |
613 | * @flags - can be used to pass additional information | |
614 | * | |
615 | * Returns 0 on success, errno otherwise. | |
616 | */ | |
617 | int knav_queue_push(void *qhandle, dma_addr_t dma, | |
618 | unsigned size, unsigned flags) | |
619 | { | |
620 | struct knav_queue *qh = qhandle; | |
621 | u32 val; | |
622 | ||
623 | val = (u32)dma | ((size / 16) - 1); | |
624 | writel_relaxed(val, &qh->reg_push[0].ptr_size_thresh); | |
625 | ||
626 | atomic_inc(&qh->stats.pushes); | |
627 | return 0; | |
628 | } | |
629 | ||
630 | /** | |
631 | * knav_queue_pop() - pop data (or descriptor) from the head of a queue | |
632 | * @qh - hardware queue handle | |
633 | * @size - (optional) size of the data pop'ed. | |
634 | * | |
635 | * Returns a DMA address on success, 0 on failure. | |
636 | */ | |
637 | dma_addr_t knav_queue_pop(void *qhandle, unsigned *size) | |
638 | { | |
639 | struct knav_queue *qh = qhandle; | |
640 | struct knav_queue_inst *inst = qh->inst; | |
641 | dma_addr_t dma; | |
642 | u32 val, idx; | |
643 | ||
644 | /* are we accumulated? */ | |
645 | if (inst->descs) { | |
646 | if (unlikely(atomic_dec_return(&inst->desc_count) < 0)) { | |
647 | atomic_inc(&inst->desc_count); | |
648 | return 0; | |
649 | } | |
650 | idx = atomic_inc_return(&inst->desc_head); | |
651 | idx &= ACC_DESCS_MASK; | |
652 | val = inst->descs[idx]; | |
653 | } else { | |
654 | val = readl_relaxed(&qh->reg_pop[0].ptr_size_thresh); | |
655 | if (unlikely(!val)) | |
656 | return 0; | |
657 | } | |
658 | ||
659 | dma = val & DESC_PTR_MASK; | |
660 | if (size) | |
661 | *size = ((val & DESC_SIZE_MASK) + 1) * 16; | |
662 | ||
663 | atomic_inc(&qh->stats.pops); | |
664 | return dma; | |
665 | } | |
666 | ||
667 | /* carve out descriptors and push into queue */ | |
668 | static void kdesc_fill_pool(struct knav_pool *pool) | |
669 | { | |
670 | struct knav_region *region; | |
671 | int i; | |
672 | ||
673 | region = pool->region; | |
674 | pool->desc_size = region->desc_size; | |
675 | for (i = 0; i < pool->num_desc; i++) { | |
676 | int index = pool->region_offset + i; | |
677 | dma_addr_t dma_addr; | |
678 | unsigned dma_size; | |
679 | dma_addr = region->dma_start + (region->desc_size * index); | |
680 | dma_size = ALIGN(pool->desc_size, SMP_CACHE_BYTES); | |
681 | dma_sync_single_for_device(pool->dev, dma_addr, dma_size, | |
682 | DMA_TO_DEVICE); | |
683 | knav_queue_push(pool->queue, dma_addr, dma_size, 0); | |
684 | } | |
685 | } | |
686 | ||
687 | /* pop out descriptors and close the queue */ | |
688 | static void kdesc_empty_pool(struct knav_pool *pool) | |
689 | { | |
690 | dma_addr_t dma; | |
691 | unsigned size; | |
692 | void *desc; | |
693 | int i; | |
694 | ||
695 | if (!pool->queue) | |
696 | return; | |
697 | ||
698 | for (i = 0;; i++) { | |
699 | dma = knav_queue_pop(pool->queue, &size); | |
700 | if (!dma) | |
701 | break; | |
702 | desc = knav_pool_desc_dma_to_virt(pool, dma); | |
703 | if (!desc) { | |
704 | dev_dbg(pool->kdev->dev, | |
705 | "couldn't unmap desc, continuing\n"); | |
706 | continue; | |
707 | } | |
708 | } | |
709 | WARN_ON(i != pool->num_desc); | |
710 | knav_queue_close(pool->queue); | |
711 | } | |
712 | ||
713 | ||
714 | /* Get the DMA address of a descriptor */ | |
715 | dma_addr_t knav_pool_desc_virt_to_dma(void *ph, void *virt) | |
716 | { | |
717 | struct knav_pool *pool = ph; | |
718 | return pool->region->dma_start + (virt - pool->region->virt_start); | |
719 | } | |
720 | ||
721 | void *knav_pool_desc_dma_to_virt(void *ph, dma_addr_t dma) | |
722 | { | |
723 | struct knav_pool *pool = ph; | |
724 | return pool->region->virt_start + (dma - pool->region->dma_start); | |
725 | } | |
726 | ||
727 | /** | |
728 | * knav_pool_create() - Create a pool of descriptors | |
729 | * @name - name to give the pool handle | |
730 | * @num_desc - numbers of descriptors in the pool | |
731 | * @region_id - QMSS region id from which the descriptors are to be | |
732 | * allocated. | |
733 | * | |
734 | * Returns a pool handle on success. | |
735 | * Use IS_ERR_OR_NULL() to identify error values on return. | |
736 | */ | |
737 | void *knav_pool_create(const char *name, | |
738 | int num_desc, int region_id) | |
739 | { | |
740 | struct knav_region *reg_itr, *region = NULL; | |
741 | struct knav_pool *pool, *pi; | |
742 | struct list_head *node; | |
743 | unsigned last_offset; | |
744 | bool slot_found; | |
745 | int ret; | |
746 | ||
747 | if (!kdev->dev) | |
748 | return ERR_PTR(-ENODEV); | |
749 | ||
750 | pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL); | |
751 | if (!pool) { | |
752 | dev_err(kdev->dev, "out of memory allocating pool\n"); | |
753 | return ERR_PTR(-ENOMEM); | |
754 | } | |
755 | ||
756 | for_each_region(kdev, reg_itr) { | |
757 | if (reg_itr->id != region_id) | |
758 | continue; | |
759 | region = reg_itr; | |
760 | break; | |
761 | } | |
762 | ||
763 | if (!region) { | |
764 | dev_err(kdev->dev, "region-id(%d) not found\n", region_id); | |
765 | ret = -EINVAL; | |
766 | goto err; | |
767 | } | |
768 | ||
769 | pool->queue = knav_queue_open(name, KNAV_QUEUE_GP, 0); | |
770 | if (IS_ERR_OR_NULL(pool->queue)) { | |
771 | dev_err(kdev->dev, | |
772 | "failed to open queue for pool(%s), error %ld\n", | |
773 | name, PTR_ERR(pool->queue)); | |
774 | ret = PTR_ERR(pool->queue); | |
775 | goto err; | |
776 | } | |
777 | ||
778 | pool->name = kstrndup(name, KNAV_NAME_SIZE, GFP_KERNEL); | |
779 | pool->kdev = kdev; | |
780 | pool->dev = kdev->dev; | |
781 | ||
782 | mutex_lock(&knav_dev_lock); | |
783 | ||
784 | if (num_desc > (region->num_desc - region->used_desc)) { | |
785 | dev_err(kdev->dev, "out of descs in region(%d) for pool(%s)\n", | |
786 | region_id, name); | |
787 | ret = -ENOMEM; | |
788 | goto err; | |
789 | } | |
790 | ||
791 | /* Region maintains a sorted (by region offset) list of pools | |
792 | * use the first free slot which is large enough to accomodate | |
793 | * the request | |
794 | */ | |
795 | last_offset = 0; | |
796 | slot_found = false; | |
797 | node = ®ion->pools; | |
798 | list_for_each_entry(pi, ®ion->pools, region_inst) { | |
799 | if ((pi->region_offset - last_offset) >= num_desc) { | |
800 | slot_found = true; | |
801 | break; | |
802 | } | |
803 | last_offset = pi->region_offset + pi->num_desc; | |
804 | } | |
805 | node = &pi->region_inst; | |
806 | ||
807 | if (slot_found) { | |
808 | pool->region = region; | |
809 | pool->num_desc = num_desc; | |
810 | pool->region_offset = last_offset; | |
811 | region->used_desc += num_desc; | |
812 | list_add_tail(&pool->list, &kdev->pools); | |
813 | list_add_tail(&pool->region_inst, node); | |
814 | } else { | |
815 | dev_err(kdev->dev, "pool(%s) create failed: fragmented desc pool in region(%d)\n", | |
816 | name, region_id); | |
817 | ret = -ENOMEM; | |
818 | goto err; | |
819 | } | |
820 | ||
821 | mutex_unlock(&knav_dev_lock); | |
822 | kdesc_fill_pool(pool); | |
823 | return pool; | |
824 | ||
825 | err: | |
826 | mutex_unlock(&knav_dev_lock); | |
827 | kfree(pool->name); | |
828 | devm_kfree(kdev->dev, pool); | |
829 | return ERR_PTR(ret); | |
830 | } | |
831 | EXPORT_SYMBOL_GPL(knav_pool_create); | |
832 | ||
833 | /** | |
834 | * knav_pool_destroy() - Free a pool of descriptors | |
835 | * @pool - pool handle | |
836 | */ | |
837 | void knav_pool_destroy(void *ph) | |
838 | { | |
839 | struct knav_pool *pool = ph; | |
840 | ||
841 | if (!pool) | |
842 | return; | |
843 | ||
844 | if (!pool->region) | |
845 | return; | |
846 | ||
847 | kdesc_empty_pool(pool); | |
848 | mutex_lock(&knav_dev_lock); | |
849 | ||
850 | pool->region->used_desc -= pool->num_desc; | |
851 | list_del(&pool->region_inst); | |
852 | list_del(&pool->list); | |
853 | ||
854 | mutex_unlock(&knav_dev_lock); | |
855 | kfree(pool->name); | |
856 | devm_kfree(kdev->dev, pool); | |
857 | } | |
858 | EXPORT_SYMBOL_GPL(knav_pool_destroy); | |
859 | ||
860 | ||
861 | /** | |
862 | * knav_pool_desc_get() - Get a descriptor from the pool | |
863 | * @pool - pool handle | |
864 | * | |
865 | * Returns descriptor from the pool. | |
866 | */ | |
867 | void *knav_pool_desc_get(void *ph) | |
868 | { | |
869 | struct knav_pool *pool = ph; | |
870 | dma_addr_t dma; | |
871 | unsigned size; | |
872 | void *data; | |
873 | ||
874 | dma = knav_queue_pop(pool->queue, &size); | |
875 | if (unlikely(!dma)) | |
876 | return ERR_PTR(-ENOMEM); | |
877 | data = knav_pool_desc_dma_to_virt(pool, dma); | |
878 | return data; | |
879 | } | |
880 | ||
881 | /** | |
882 | * knav_pool_desc_put() - return a descriptor to the pool | |
883 | * @pool - pool handle | |
884 | */ | |
885 | void knav_pool_desc_put(void *ph, void *desc) | |
886 | { | |
887 | struct knav_pool *pool = ph; | |
888 | dma_addr_t dma; | |
889 | dma = knav_pool_desc_virt_to_dma(pool, desc); | |
890 | knav_queue_push(pool->queue, dma, pool->region->desc_size, 0); | |
891 | } | |
892 | ||
893 | /** | |
894 | * knav_pool_desc_map() - Map descriptor for DMA transfer | |
895 | * @pool - pool handle | |
896 | * @desc - address of descriptor to map | |
897 | * @size - size of descriptor to map | |
898 | * @dma - DMA address return pointer | |
899 | * @dma_sz - adjusted return pointer | |
900 | * | |
901 | * Returns 0 on success, errno otherwise. | |
902 | */ | |
903 | int knav_pool_desc_map(void *ph, void *desc, unsigned size, | |
904 | dma_addr_t *dma, unsigned *dma_sz) | |
905 | { | |
906 | struct knav_pool *pool = ph; | |
907 | *dma = knav_pool_desc_virt_to_dma(pool, desc); | |
908 | size = min(size, pool->region->desc_size); | |
909 | size = ALIGN(size, SMP_CACHE_BYTES); | |
910 | *dma_sz = size; | |
911 | dma_sync_single_for_device(pool->dev, *dma, size, DMA_TO_DEVICE); | |
912 | ||
913 | /* Ensure the descriptor reaches to the memory */ | |
914 | __iowmb(); | |
915 | ||
916 | return 0; | |
917 | } | |
918 | ||
919 | /** | |
920 | * knav_pool_desc_unmap() - Unmap descriptor after DMA transfer | |
921 | * @pool - pool handle | |
922 | * @dma - DMA address of descriptor to unmap | |
923 | * @dma_sz - size of descriptor to unmap | |
924 | * | |
925 | * Returns descriptor address on success, Use IS_ERR_OR_NULL() to identify | |
926 | * error values on return. | |
927 | */ | |
928 | void *knav_pool_desc_unmap(void *ph, dma_addr_t dma, unsigned dma_sz) | |
929 | { | |
930 | struct knav_pool *pool = ph; | |
931 | unsigned desc_sz; | |
932 | void *desc; | |
933 | ||
934 | desc_sz = min(dma_sz, pool->region->desc_size); | |
935 | desc = knav_pool_desc_dma_to_virt(pool, dma); | |
936 | dma_sync_single_for_cpu(pool->dev, dma, desc_sz, DMA_FROM_DEVICE); | |
937 | prefetch(desc); | |
938 | return desc; | |
939 | } | |
940 | ||
941 | /** | |
942 | * knav_pool_count() - Get the number of descriptors in pool. | |
943 | * @pool - pool handle | |
944 | * Returns number of elements in the pool. | |
945 | */ | |
946 | int knav_pool_count(void *ph) | |
947 | { | |
948 | struct knav_pool *pool = ph; | |
949 | return knav_queue_get_count(pool->queue); | |
950 | } | |
951 | ||
952 | static void knav_queue_setup_region(struct knav_device *kdev, | |
953 | struct knav_region *region) | |
954 | { | |
955 | unsigned hw_num_desc, hw_desc_size, size; | |
956 | struct knav_reg_region __iomem *regs; | |
957 | struct knav_qmgr_info *qmgr; | |
958 | struct knav_pool *pool; | |
959 | int id = region->id; | |
960 | struct page *page; | |
961 | ||
962 | /* unused region? */ | |
963 | if (!region->num_desc) { | |
964 | dev_warn(kdev->dev, "unused region %s\n", region->name); | |
965 | return; | |
966 | } | |
967 | ||
968 | /* get hardware descriptor value */ | |
969 | hw_num_desc = ilog2(region->num_desc - 1) + 1; | |
970 | ||
971 | /* did we force fit ourselves into nothingness? */ | |
972 | if (region->num_desc < 32) { | |
973 | region->num_desc = 0; | |
974 | dev_warn(kdev->dev, "too few descriptors in region %s\n", | |
975 | region->name); | |
976 | return; | |
977 | } | |
978 | ||
979 | size = region->num_desc * region->desc_size; | |
980 | region->virt_start = alloc_pages_exact(size, GFP_KERNEL | GFP_DMA | | |
981 | GFP_DMA32); | |
982 | if (!region->virt_start) { | |
983 | region->num_desc = 0; | |
984 | dev_err(kdev->dev, "memory alloc failed for region %s\n", | |
985 | region->name); | |
986 | return; | |
987 | } | |
988 | region->virt_end = region->virt_start + size; | |
989 | page = virt_to_page(region->virt_start); | |
990 | ||
991 | region->dma_start = dma_map_page(kdev->dev, page, 0, size, | |
992 | DMA_BIDIRECTIONAL); | |
993 | if (dma_mapping_error(kdev->dev, region->dma_start)) { | |
994 | dev_err(kdev->dev, "dma map failed for region %s\n", | |
995 | region->name); | |
996 | goto fail; | |
997 | } | |
998 | region->dma_end = region->dma_start + size; | |
999 | ||
1000 | pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL); | |
1001 | if (!pool) { | |
1002 | dev_err(kdev->dev, "out of memory allocating dummy pool\n"); | |
1003 | goto fail; | |
1004 | } | |
1005 | pool->num_desc = 0; | |
1006 | pool->region_offset = region->num_desc; | |
1007 | list_add(&pool->region_inst, ®ion->pools); | |
1008 | ||
1009 | dev_dbg(kdev->dev, | |
1010 | "region %s (%d): size:%d, link:%d@%d, phys:%08x-%08x, virt:%p-%p\n", | |
1011 | region->name, id, region->desc_size, region->num_desc, | |
1012 | region->link_index, region->dma_start, region->dma_end, | |
1013 | region->virt_start, region->virt_end); | |
1014 | ||
1015 | hw_desc_size = (region->desc_size / 16) - 1; | |
1016 | hw_num_desc -= 5; | |
1017 | ||
1018 | for_each_qmgr(kdev, qmgr) { | |
1019 | regs = qmgr->reg_region + id; | |
1020 | writel_relaxed(region->dma_start, ®s->base); | |
1021 | writel_relaxed(region->link_index, ®s->start_index); | |
1022 | writel_relaxed(hw_desc_size << 16 | hw_num_desc, | |
1023 | ®s->size_count); | |
1024 | } | |
1025 | return; | |
1026 | ||
1027 | fail: | |
1028 | if (region->dma_start) | |
1029 | dma_unmap_page(kdev->dev, region->dma_start, size, | |
1030 | DMA_BIDIRECTIONAL); | |
1031 | if (region->virt_start) | |
1032 | free_pages_exact(region->virt_start, size); | |
1033 | region->num_desc = 0; | |
1034 | return; | |
1035 | } | |
1036 | ||
1037 | static const char *knav_queue_find_name(struct device_node *node) | |
1038 | { | |
1039 | const char *name; | |
1040 | ||
1041 | if (of_property_read_string(node, "label", &name) < 0) | |
1042 | name = node->name; | |
1043 | if (!name) | |
1044 | name = "unknown"; | |
1045 | return name; | |
1046 | } | |
1047 | ||
1048 | static int knav_queue_setup_regions(struct knav_device *kdev, | |
1049 | struct device_node *regions) | |
1050 | { | |
1051 | struct device *dev = kdev->dev; | |
1052 | struct knav_region *region; | |
1053 | struct device_node *child; | |
1054 | u32 temp[2]; | |
1055 | int ret; | |
1056 | ||
1057 | for_each_child_of_node(regions, child) { | |
1058 | region = devm_kzalloc(dev, sizeof(*region), GFP_KERNEL); | |
1059 | if (!region) { | |
1060 | dev_err(dev, "out of memory allocating region\n"); | |
1061 | return -ENOMEM; | |
1062 | } | |
1063 | ||
1064 | region->name = knav_queue_find_name(child); | |
1065 | of_property_read_u32(child, "id", ®ion->id); | |
1066 | ret = of_property_read_u32_array(child, "region-spec", temp, 2); | |
1067 | if (!ret) { | |
1068 | region->num_desc = temp[0]; | |
1069 | region->desc_size = temp[1]; | |
1070 | } else { | |
1071 | dev_err(dev, "invalid region info %s\n", region->name); | |
1072 | devm_kfree(dev, region); | |
1073 | continue; | |
1074 | } | |
1075 | ||
1076 | if (!of_get_property(child, "link-index", NULL)) { | |
1077 | dev_err(dev, "No link info for %s\n", region->name); | |
1078 | devm_kfree(dev, region); | |
1079 | continue; | |
1080 | } | |
1081 | ret = of_property_read_u32(child, "link-index", | |
1082 | ®ion->link_index); | |
1083 | if (ret) { | |
1084 | dev_err(dev, "link index not found for %s\n", | |
1085 | region->name); | |
1086 | devm_kfree(dev, region); | |
1087 | continue; | |
1088 | } | |
1089 | ||
1090 | INIT_LIST_HEAD(®ion->pools); | |
1091 | list_add_tail(®ion->list, &kdev->regions); | |
1092 | } | |
1093 | if (list_empty(&kdev->regions)) { | |
1094 | dev_err(dev, "no valid region information found\n"); | |
1095 | return -ENODEV; | |
1096 | } | |
1097 | ||
1098 | /* Next, we run through the regions and set things up */ | |
1099 | for_each_region(kdev, region) | |
1100 | knav_queue_setup_region(kdev, region); | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | static int knav_get_link_ram(struct knav_device *kdev, | |
1106 | const char *name, | |
1107 | struct knav_link_ram_block *block) | |
1108 | { | |
1109 | struct platform_device *pdev = to_platform_device(kdev->dev); | |
1110 | struct device_node *node = pdev->dev.of_node; | |
1111 | u32 temp[2]; | |
1112 | ||
1113 | /* | |
1114 | * Note: link ram resources are specified in "entry" sized units. In | |
1115 | * reality, although entries are ~40bits in hardware, we treat them as | |
1116 | * 64-bit entities here. | |
1117 | * | |
1118 | * For example, to specify the internal link ram for Keystone-I class | |
1119 | * devices, we would set the linkram0 resource to 0x80000-0x83fff. | |
1120 | * | |
1121 | * This gets a bit weird when other link rams are used. For example, | |
1122 | * if the range specified is 0x0c000000-0x0c003fff (i.e., 16K entries | |
1123 | * in MSMC SRAM), the actual memory used is 0x0c000000-0x0c020000, | |
1124 | * which accounts for 64-bits per entry, for 16K entries. | |
1125 | */ | |
1126 | if (!of_property_read_u32_array(node, name , temp, 2)) { | |
1127 | if (temp[0]) { | |
1128 | /* | |
1129 | * queue_base specified => using internal or onchip | |
1130 | * link ram WARNING - we do not "reserve" this block | |
1131 | */ | |
1132 | block->phys = (dma_addr_t)temp[0]; | |
1133 | block->virt = NULL; | |
1134 | block->size = temp[1]; | |
1135 | } else { | |
1136 | block->size = temp[1]; | |
1137 | /* queue_base not specific => allocate requested size */ | |
1138 | block->virt = dmam_alloc_coherent(kdev->dev, | |
1139 | 8 * block->size, &block->phys, | |
1140 | GFP_KERNEL); | |
1141 | if (!block->virt) { | |
1142 | dev_err(kdev->dev, "failed to alloc linkram\n"); | |
1143 | return -ENOMEM; | |
1144 | } | |
1145 | } | |
1146 | } else { | |
1147 | return -ENODEV; | |
1148 | } | |
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | static int knav_queue_setup_link_ram(struct knav_device *kdev) | |
1153 | { | |
1154 | struct knav_link_ram_block *block; | |
1155 | struct knav_qmgr_info *qmgr; | |
1156 | ||
1157 | for_each_qmgr(kdev, qmgr) { | |
1158 | block = &kdev->link_rams[0]; | |
1159 | dev_dbg(kdev->dev, "linkram0: phys:%x, virt:%p, size:%x\n", | |
1160 | block->phys, block->virt, block->size); | |
1161 | writel_relaxed(block->phys, &qmgr->reg_config->link_ram_base0); | |
1162 | writel_relaxed(block->size, &qmgr->reg_config->link_ram_size0); | |
1163 | ||
1164 | block++; | |
1165 | if (!block->size) | |
1166 | return 0; | |
1167 | ||
1168 | dev_dbg(kdev->dev, "linkram1: phys:%x, virt:%p, size:%x\n", | |
1169 | block->phys, block->virt, block->size); | |
1170 | writel_relaxed(block->phys, &qmgr->reg_config->link_ram_base1); | |
1171 | } | |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | static int knav_setup_queue_range(struct knav_device *kdev, | |
1177 | struct device_node *node) | |
1178 | { | |
1179 | struct device *dev = kdev->dev; | |
1180 | struct knav_range_info *range; | |
1181 | struct knav_qmgr_info *qmgr; | |
1182 | u32 temp[2], start, end, id, index; | |
1183 | int ret, i; | |
1184 | ||
1185 | range = devm_kzalloc(dev, sizeof(*range), GFP_KERNEL); | |
1186 | if (!range) { | |
1187 | dev_err(dev, "out of memory allocating range\n"); | |
1188 | return -ENOMEM; | |
1189 | } | |
1190 | ||
1191 | range->kdev = kdev; | |
1192 | range->name = knav_queue_find_name(node); | |
1193 | ret = of_property_read_u32_array(node, "qrange", temp, 2); | |
1194 | if (!ret) { | |
1195 | range->queue_base = temp[0] - kdev->base_id; | |
1196 | range->num_queues = temp[1]; | |
1197 | } else { | |
1198 | dev_err(dev, "invalid queue range %s\n", range->name); | |
1199 | devm_kfree(dev, range); | |
1200 | return -EINVAL; | |
1201 | } | |
1202 | ||
1203 | for (i = 0; i < RANGE_MAX_IRQS; i++) { | |
1204 | struct of_phandle_args oirq; | |
1205 | ||
1206 | if (of_irq_parse_one(node, i, &oirq)) | |
1207 | break; | |
1208 | ||
1209 | range->irqs[i].irq = irq_create_of_mapping(&oirq); | |
1210 | if (range->irqs[i].irq == IRQ_NONE) | |
1211 | break; | |
1212 | ||
1213 | range->num_irqs++; | |
1214 | ||
1215 | if (oirq.args_count == 3) | |
1216 | range->irqs[i].cpu_map = | |
1217 | (oirq.args[2] & 0x0000ff00) >> 8; | |
1218 | } | |
1219 | ||
1220 | range->num_irqs = min(range->num_irqs, range->num_queues); | |
1221 | if (range->num_irqs) | |
1222 | range->flags |= RANGE_HAS_IRQ; | |
1223 | ||
1224 | if (of_get_property(node, "qalloc-by-id", NULL)) | |
1225 | range->flags |= RANGE_RESERVED; | |
1226 | ||
1227 | if (of_get_property(node, "accumulator", NULL)) { | |
1228 | ret = knav_init_acc_range(kdev, node, range); | |
1229 | if (ret < 0) { | |
1230 | devm_kfree(dev, range); | |
1231 | return ret; | |
1232 | } | |
1233 | } else { | |
1234 | range->ops = &knav_gp_range_ops; | |
1235 | } | |
1236 | ||
1237 | /* set threshold to 1, and flush out the queues */ | |
1238 | for_each_qmgr(kdev, qmgr) { | |
1239 | start = max(qmgr->start_queue, range->queue_base); | |
1240 | end = min(qmgr->start_queue + qmgr->num_queues, | |
1241 | range->queue_base + range->num_queues); | |
1242 | for (id = start; id < end; id++) { | |
1243 | index = id - qmgr->start_queue; | |
1244 | writel_relaxed(THRESH_GTE | 1, | |
1245 | &qmgr->reg_peek[index].ptr_size_thresh); | |
1246 | writel_relaxed(0, | |
1247 | &qmgr->reg_push[index].ptr_size_thresh); | |
1248 | } | |
1249 | } | |
1250 | ||
1251 | list_add_tail(&range->list, &kdev->queue_ranges); | |
1252 | dev_dbg(dev, "added range %s: %d-%d, %d irqs%s%s%s\n", | |
1253 | range->name, range->queue_base, | |
1254 | range->queue_base + range->num_queues - 1, | |
1255 | range->num_irqs, | |
1256 | (range->flags & RANGE_HAS_IRQ) ? ", has irq" : "", | |
1257 | (range->flags & RANGE_RESERVED) ? ", reserved" : "", | |
1258 | (range->flags & RANGE_HAS_ACCUMULATOR) ? ", acc" : ""); | |
1259 | kdev->num_queues_in_use += range->num_queues; | |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | static int knav_setup_queue_pools(struct knav_device *kdev, | |
1264 | struct device_node *queue_pools) | |
1265 | { | |
1266 | struct device_node *type, *range; | |
1267 | int ret; | |
1268 | ||
1269 | for_each_child_of_node(queue_pools, type) { | |
1270 | for_each_child_of_node(type, range) { | |
1271 | ret = knav_setup_queue_range(kdev, range); | |
1272 | /* return value ignored, we init the rest... */ | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | /* ... and barf if they all failed! */ | |
1277 | if (list_empty(&kdev->queue_ranges)) { | |
1278 | dev_err(kdev->dev, "no valid queue range found\n"); | |
1279 | return -ENODEV; | |
1280 | } | |
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | static void knav_free_queue_range(struct knav_device *kdev, | |
1285 | struct knav_range_info *range) | |
1286 | { | |
1287 | if (range->ops && range->ops->free_range) | |
1288 | range->ops->free_range(range); | |
1289 | list_del(&range->list); | |
1290 | devm_kfree(kdev->dev, range); | |
1291 | } | |
1292 | ||
1293 | static void knav_free_queue_ranges(struct knav_device *kdev) | |
1294 | { | |
1295 | struct knav_range_info *range; | |
1296 | ||
1297 | for (;;) { | |
1298 | range = first_queue_range(kdev); | |
1299 | if (!range) | |
1300 | break; | |
1301 | knav_free_queue_range(kdev, range); | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | static void knav_queue_free_regions(struct knav_device *kdev) | |
1306 | { | |
1307 | struct knav_region *region; | |
1308 | struct knav_pool *pool; | |
1309 | unsigned size; | |
1310 | ||
1311 | for (;;) { | |
1312 | region = first_region(kdev); | |
1313 | if (!region) | |
1314 | break; | |
1315 | list_for_each_entry(pool, ®ion->pools, region_inst) | |
1316 | knav_pool_destroy(pool); | |
1317 | ||
1318 | size = region->virt_end - region->virt_start; | |
1319 | if (size) | |
1320 | free_pages_exact(region->virt_start, size); | |
1321 | list_del(®ion->list); | |
1322 | devm_kfree(kdev->dev, region); | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | static void __iomem *knav_queue_map_reg(struct knav_device *kdev, | |
1327 | struct device_node *node, int index) | |
1328 | { | |
1329 | struct resource res; | |
1330 | void __iomem *regs; | |
1331 | int ret; | |
1332 | ||
1333 | ret = of_address_to_resource(node, index, &res); | |
1334 | if (ret) { | |
1335 | dev_err(kdev->dev, "Can't translate of node(%s) address for index(%d)\n", | |
1336 | node->name, index); | |
1337 | return ERR_PTR(ret); | |
1338 | } | |
1339 | ||
1340 | regs = devm_ioremap_resource(kdev->dev, &res); | |
1341 | if (IS_ERR(regs)) | |
1342 | dev_err(kdev->dev, "Failed to map register base for index(%d) node(%s)\n", | |
1343 | index, node->name); | |
1344 | return regs; | |
1345 | } | |
1346 | ||
1347 | static int knav_queue_init_qmgrs(struct knav_device *kdev, | |
1348 | struct device_node *qmgrs) | |
1349 | { | |
1350 | struct device *dev = kdev->dev; | |
1351 | struct knav_qmgr_info *qmgr; | |
1352 | struct device_node *child; | |
1353 | u32 temp[2]; | |
1354 | int ret; | |
1355 | ||
1356 | for_each_child_of_node(qmgrs, child) { | |
1357 | qmgr = devm_kzalloc(dev, sizeof(*qmgr), GFP_KERNEL); | |
1358 | if (!qmgr) { | |
1359 | dev_err(dev, "out of memory allocating qmgr\n"); | |
1360 | return -ENOMEM; | |
1361 | } | |
1362 | ||
1363 | ret = of_property_read_u32_array(child, "managed-queues", | |
1364 | temp, 2); | |
1365 | if (!ret) { | |
1366 | qmgr->start_queue = temp[0]; | |
1367 | qmgr->num_queues = temp[1]; | |
1368 | } else { | |
1369 | dev_err(dev, "invalid qmgr queue range\n"); | |
1370 | devm_kfree(dev, qmgr); | |
1371 | continue; | |
1372 | } | |
1373 | ||
1374 | dev_info(dev, "qmgr start queue %d, number of queues %d\n", | |
1375 | qmgr->start_queue, qmgr->num_queues); | |
1376 | ||
1377 | qmgr->reg_peek = | |
1378 | knav_queue_map_reg(kdev, child, | |
1379 | KNAV_QUEUE_PEEK_REG_INDEX); | |
1380 | qmgr->reg_status = | |
1381 | knav_queue_map_reg(kdev, child, | |
1382 | KNAV_QUEUE_STATUS_REG_INDEX); | |
1383 | qmgr->reg_config = | |
1384 | knav_queue_map_reg(kdev, child, | |
1385 | KNAV_QUEUE_CONFIG_REG_INDEX); | |
1386 | qmgr->reg_region = | |
1387 | knav_queue_map_reg(kdev, child, | |
1388 | KNAV_QUEUE_REGION_REG_INDEX); | |
1389 | qmgr->reg_push = | |
1390 | knav_queue_map_reg(kdev, child, | |
1391 | KNAV_QUEUE_PUSH_REG_INDEX); | |
1392 | qmgr->reg_pop = | |
1393 | knav_queue_map_reg(kdev, child, | |
1394 | KNAV_QUEUE_POP_REG_INDEX); | |
1395 | ||
1396 | if (IS_ERR(qmgr->reg_peek) || IS_ERR(qmgr->reg_status) || | |
1397 | IS_ERR(qmgr->reg_config) || IS_ERR(qmgr->reg_region) || | |
1398 | IS_ERR(qmgr->reg_push) || IS_ERR(qmgr->reg_pop)) { | |
1399 | dev_err(dev, "failed to map qmgr regs\n"); | |
1400 | if (!IS_ERR(qmgr->reg_peek)) | |
1401 | devm_iounmap(dev, qmgr->reg_peek); | |
1402 | if (!IS_ERR(qmgr->reg_status)) | |
1403 | devm_iounmap(dev, qmgr->reg_status); | |
1404 | if (!IS_ERR(qmgr->reg_config)) | |
1405 | devm_iounmap(dev, qmgr->reg_config); | |
1406 | if (!IS_ERR(qmgr->reg_region)) | |
1407 | devm_iounmap(dev, qmgr->reg_region); | |
1408 | if (!IS_ERR(qmgr->reg_push)) | |
1409 | devm_iounmap(dev, qmgr->reg_push); | |
1410 | if (!IS_ERR(qmgr->reg_pop)) | |
1411 | devm_iounmap(dev, qmgr->reg_pop); | |
1412 | devm_kfree(dev, qmgr); | |
1413 | continue; | |
1414 | } | |
1415 | ||
1416 | list_add_tail(&qmgr->list, &kdev->qmgrs); | |
1417 | 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", | |
1418 | qmgr->start_queue, qmgr->num_queues, | |
1419 | qmgr->reg_peek, qmgr->reg_status, | |
1420 | qmgr->reg_config, qmgr->reg_region, | |
1421 | qmgr->reg_push, qmgr->reg_pop); | |
1422 | } | |
1423 | return 0; | |
1424 | } | |
1425 | ||
1426 | static int knav_queue_init_pdsps(struct knav_device *kdev, | |
1427 | struct device_node *pdsps) | |
1428 | { | |
1429 | struct device *dev = kdev->dev; | |
1430 | struct knav_pdsp_info *pdsp; | |
1431 | struct device_node *child; | |
1432 | int ret; | |
1433 | ||
1434 | for_each_child_of_node(pdsps, child) { | |
1435 | pdsp = devm_kzalloc(dev, sizeof(*pdsp), GFP_KERNEL); | |
1436 | if (!pdsp) { | |
1437 | dev_err(dev, "out of memory allocating pdsp\n"); | |
1438 | return -ENOMEM; | |
1439 | } | |
1440 | pdsp->name = knav_queue_find_name(child); | |
1441 | ret = of_property_read_string(child, "firmware", | |
1442 | &pdsp->firmware); | |
1443 | if (ret < 0 || !pdsp->firmware) { | |
1444 | dev_err(dev, "unknown firmware for pdsp %s\n", | |
1445 | pdsp->name); | |
1446 | devm_kfree(dev, pdsp); | |
1447 | continue; | |
1448 | } | |
1449 | dev_dbg(dev, "pdsp name %s fw name :%s\n", pdsp->name, | |
1450 | pdsp->firmware); | |
1451 | ||
1452 | pdsp->iram = | |
1453 | knav_queue_map_reg(kdev, child, | |
1454 | KNAV_QUEUE_PDSP_IRAM_REG_INDEX); | |
1455 | pdsp->regs = | |
1456 | knav_queue_map_reg(kdev, child, | |
1457 | KNAV_QUEUE_PDSP_REGS_REG_INDEX); | |
1458 | pdsp->intd = | |
1459 | knav_queue_map_reg(kdev, child, | |
1460 | KNAV_QUEUE_PDSP_INTD_REG_INDEX); | |
1461 | pdsp->command = | |
1462 | knav_queue_map_reg(kdev, child, | |
1463 | KNAV_QUEUE_PDSP_CMD_REG_INDEX); | |
1464 | ||
1465 | if (IS_ERR(pdsp->command) || IS_ERR(pdsp->iram) || | |
1466 | IS_ERR(pdsp->regs) || IS_ERR(pdsp->intd)) { | |
1467 | dev_err(dev, "failed to map pdsp %s regs\n", | |
1468 | pdsp->name); | |
1469 | if (!IS_ERR(pdsp->command)) | |
1470 | devm_iounmap(dev, pdsp->command); | |
1471 | if (!IS_ERR(pdsp->iram)) | |
1472 | devm_iounmap(dev, pdsp->iram); | |
1473 | if (!IS_ERR(pdsp->regs)) | |
1474 | devm_iounmap(dev, pdsp->regs); | |
1475 | if (!IS_ERR(pdsp->intd)) | |
1476 | devm_iounmap(dev, pdsp->intd); | |
1477 | devm_kfree(dev, pdsp); | |
1478 | continue; | |
1479 | } | |
1480 | of_property_read_u32(child, "id", &pdsp->id); | |
1481 | list_add_tail(&pdsp->list, &kdev->pdsps); | |
1482 | dev_dbg(dev, "added pdsp %s: command %p, iram %p, regs %p, intd %p, firmware %s\n", | |
1483 | pdsp->name, pdsp->command, pdsp->iram, pdsp->regs, | |
1484 | pdsp->intd, pdsp->firmware); | |
1485 | } | |
1486 | return 0; | |
1487 | } | |
1488 | ||
1489 | static int knav_queue_stop_pdsp(struct knav_device *kdev, | |
1490 | struct knav_pdsp_info *pdsp) | |
1491 | { | |
1492 | u32 val, timeout = 1000; | |
1493 | int ret; | |
1494 | ||
1495 | val = readl_relaxed(&pdsp->regs->control) & ~PDSP_CTRL_ENABLE; | |
1496 | writel_relaxed(val, &pdsp->regs->control); | |
1497 | ret = knav_queue_pdsp_wait(&pdsp->regs->control, timeout, | |
1498 | PDSP_CTRL_RUNNING); | |
1499 | if (ret < 0) { | |
1500 | dev_err(kdev->dev, "timed out on pdsp %s stop\n", pdsp->name); | |
1501 | return ret; | |
1502 | } | |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | static int knav_queue_load_pdsp(struct knav_device *kdev, | |
1507 | struct knav_pdsp_info *pdsp) | |
1508 | { | |
1509 | int i, ret, fwlen; | |
1510 | const struct firmware *fw; | |
1511 | u32 *fwdata; | |
1512 | ||
1513 | ret = request_firmware(&fw, pdsp->firmware, kdev->dev); | |
1514 | if (ret) { | |
1515 | dev_err(kdev->dev, "failed to get firmware %s for pdsp %s\n", | |
1516 | pdsp->firmware, pdsp->name); | |
1517 | return ret; | |
1518 | } | |
1519 | writel_relaxed(pdsp->id + 1, pdsp->command + 0x18); | |
1520 | /* download the firmware */ | |
1521 | fwdata = (u32 *)fw->data; | |
1522 | fwlen = (fw->size + sizeof(u32) - 1) / sizeof(u32); | |
1523 | for (i = 0; i < fwlen; i++) | |
1524 | writel_relaxed(be32_to_cpu(fwdata[i]), pdsp->iram + i); | |
1525 | ||
1526 | release_firmware(fw); | |
1527 | return 0; | |
1528 | } | |
1529 | ||
1530 | static int knav_queue_start_pdsp(struct knav_device *kdev, | |
1531 | struct knav_pdsp_info *pdsp) | |
1532 | { | |
1533 | u32 val, timeout = 1000; | |
1534 | int ret; | |
1535 | ||
1536 | /* write a command for sync */ | |
1537 | writel_relaxed(0xffffffff, pdsp->command); | |
1538 | while (readl_relaxed(pdsp->command) != 0xffffffff) | |
1539 | cpu_relax(); | |
1540 | ||
1541 | /* soft reset the PDSP */ | |
1542 | val = readl_relaxed(&pdsp->regs->control); | |
1543 | val &= ~(PDSP_CTRL_PC_MASK | PDSP_CTRL_SOFT_RESET); | |
1544 | writel_relaxed(val, &pdsp->regs->control); | |
1545 | ||
1546 | /* enable pdsp */ | |
1547 | val = readl_relaxed(&pdsp->regs->control) | PDSP_CTRL_ENABLE; | |
1548 | writel_relaxed(val, &pdsp->regs->control); | |
1549 | ||
1550 | /* wait for command register to clear */ | |
1551 | ret = knav_queue_pdsp_wait(pdsp->command, timeout, 0); | |
1552 | if (ret < 0) { | |
1553 | dev_err(kdev->dev, | |
1554 | "timed out on pdsp %s command register wait\n", | |
1555 | pdsp->name); | |
1556 | return ret; | |
1557 | } | |
1558 | return 0; | |
1559 | } | |
1560 | ||
1561 | static void knav_queue_stop_pdsps(struct knav_device *kdev) | |
1562 | { | |
1563 | struct knav_pdsp_info *pdsp; | |
1564 | ||
1565 | /* disable all pdsps */ | |
1566 | for_each_pdsp(kdev, pdsp) | |
1567 | knav_queue_stop_pdsp(kdev, pdsp); | |
1568 | } | |
1569 | ||
1570 | static int knav_queue_start_pdsps(struct knav_device *kdev) | |
1571 | { | |
1572 | struct knav_pdsp_info *pdsp; | |
1573 | int ret; | |
1574 | ||
1575 | knav_queue_stop_pdsps(kdev); | |
1576 | /* now load them all */ | |
1577 | for_each_pdsp(kdev, pdsp) { | |
1578 | ret = knav_queue_load_pdsp(kdev, pdsp); | |
1579 | if (ret < 0) | |
1580 | return ret; | |
1581 | } | |
1582 | ||
1583 | for_each_pdsp(kdev, pdsp) { | |
1584 | ret = knav_queue_start_pdsp(kdev, pdsp); | |
1585 | WARN_ON(ret); | |
1586 | } | |
1587 | return 0; | |
1588 | } | |
1589 | ||
1590 | static inline struct knav_qmgr_info *knav_find_qmgr(unsigned id) | |
1591 | { | |
1592 | struct knav_qmgr_info *qmgr; | |
1593 | ||
1594 | for_each_qmgr(kdev, qmgr) { | |
1595 | if ((id >= qmgr->start_queue) && | |
1596 | (id < qmgr->start_queue + qmgr->num_queues)) | |
1597 | return qmgr; | |
1598 | } | |
1599 | return NULL; | |
1600 | } | |
1601 | ||
1602 | static int knav_queue_init_queue(struct knav_device *kdev, | |
1603 | struct knav_range_info *range, | |
1604 | struct knav_queue_inst *inst, | |
1605 | unsigned id) | |
1606 | { | |
1607 | char irq_name[KNAV_NAME_SIZE]; | |
1608 | inst->qmgr = knav_find_qmgr(id); | |
1609 | if (!inst->qmgr) | |
1610 | return -1; | |
1611 | ||
1612 | INIT_LIST_HEAD(&inst->handles); | |
1613 | inst->kdev = kdev; | |
1614 | inst->range = range; | |
1615 | inst->irq_num = -1; | |
1616 | inst->id = id; | |
1617 | scnprintf(irq_name, sizeof(irq_name), "hwqueue-%d", id); | |
1618 | inst->irq_name = kstrndup(irq_name, sizeof(irq_name), GFP_KERNEL); | |
1619 | ||
1620 | if (range->ops && range->ops->init_queue) | |
1621 | return range->ops->init_queue(range, inst); | |
1622 | else | |
1623 | return 0; | |
1624 | } | |
1625 | ||
1626 | static int knav_queue_init_queues(struct knav_device *kdev) | |
1627 | { | |
1628 | struct knav_range_info *range; | |
1629 | int size, id, base_idx; | |
1630 | int idx = 0, ret = 0; | |
1631 | ||
1632 | /* how much do we need for instance data? */ | |
1633 | size = sizeof(struct knav_queue_inst); | |
1634 | ||
1635 | /* round this up to a power of 2, keep the index to instance | |
1636 | * arithmetic fast. | |
1637 | * */ | |
1638 | kdev->inst_shift = order_base_2(size); | |
1639 | size = (1 << kdev->inst_shift) * kdev->num_queues_in_use; | |
1640 | kdev->instances = devm_kzalloc(kdev->dev, size, GFP_KERNEL); | |
1641 | if (!kdev->instances) | |
1642 | return -1; | |
1643 | ||
1644 | for_each_queue_range(kdev, range) { | |
1645 | if (range->ops && range->ops->init_range) | |
1646 | range->ops->init_range(range); | |
1647 | base_idx = idx; | |
1648 | for (id = range->queue_base; | |
1649 | id < range->queue_base + range->num_queues; id++, idx++) { | |
1650 | ret = knav_queue_init_queue(kdev, range, | |
1651 | knav_queue_idx_to_inst(kdev, idx), id); | |
1652 | if (ret < 0) | |
1653 | return ret; | |
1654 | } | |
1655 | range->queue_base_inst = | |
1656 | knav_queue_idx_to_inst(kdev, base_idx); | |
1657 | } | |
1658 | return 0; | |
1659 | } | |
1660 | ||
1661 | static int knav_queue_probe(struct platform_device *pdev) | |
1662 | { | |
1663 | struct device_node *node = pdev->dev.of_node; | |
1664 | struct device_node *qmgrs, *queue_pools, *regions, *pdsps; | |
1665 | struct device *dev = &pdev->dev; | |
1666 | u32 temp[2]; | |
1667 | int ret; | |
1668 | ||
1669 | if (!node) { | |
1670 | dev_err(dev, "device tree info unavailable\n"); | |
1671 | return -ENODEV; | |
1672 | } | |
1673 | ||
1674 | kdev = devm_kzalloc(dev, sizeof(struct knav_device), GFP_KERNEL); | |
1675 | if (!kdev) { | |
1676 | dev_err(dev, "memory allocation failed\n"); | |
1677 | return -ENOMEM; | |
1678 | } | |
1679 | ||
1680 | platform_set_drvdata(pdev, kdev); | |
1681 | kdev->dev = dev; | |
1682 | INIT_LIST_HEAD(&kdev->queue_ranges); | |
1683 | INIT_LIST_HEAD(&kdev->qmgrs); | |
1684 | INIT_LIST_HEAD(&kdev->pools); | |
1685 | INIT_LIST_HEAD(&kdev->regions); | |
1686 | INIT_LIST_HEAD(&kdev->pdsps); | |
1687 | ||
1688 | pm_runtime_enable(&pdev->dev); | |
1689 | ret = pm_runtime_get_sync(&pdev->dev); | |
1690 | if (ret < 0) { | |
1691 | dev_err(dev, "Failed to enable QMSS\n"); | |
1692 | return ret; | |
1693 | } | |
1694 | ||
1695 | if (of_property_read_u32_array(node, "queue-range", temp, 2)) { | |
1696 | dev_err(dev, "queue-range not specified\n"); | |
1697 | ret = -ENODEV; | |
1698 | goto err; | |
1699 | } | |
1700 | kdev->base_id = temp[0]; | |
1701 | kdev->num_queues = temp[1]; | |
1702 | ||
1703 | /* Initialize queue managers using device tree configuration */ | |
1704 | qmgrs = of_get_child_by_name(node, "qmgrs"); | |
1705 | if (!qmgrs) { | |
1706 | dev_err(dev, "queue manager info not specified\n"); | |
1707 | ret = -ENODEV; | |
1708 | goto err; | |
1709 | } | |
1710 | ret = knav_queue_init_qmgrs(kdev, qmgrs); | |
1711 | of_node_put(qmgrs); | |
1712 | if (ret) | |
1713 | goto err; | |
1714 | ||
1715 | /* get pdsp configuration values from device tree */ | |
1716 | pdsps = of_get_child_by_name(node, "pdsps"); | |
1717 | if (pdsps) { | |
1718 | ret = knav_queue_init_pdsps(kdev, pdsps); | |
1719 | if (ret) | |
1720 | goto err; | |
1721 | ||
1722 | ret = knav_queue_start_pdsps(kdev); | |
1723 | if (ret) | |
1724 | goto err; | |
1725 | } | |
1726 | of_node_put(pdsps); | |
1727 | ||
1728 | /* get usable queue range values from device tree */ | |
1729 | queue_pools = of_get_child_by_name(node, "queue-pools"); | |
1730 | if (!queue_pools) { | |
1731 | dev_err(dev, "queue-pools not specified\n"); | |
1732 | ret = -ENODEV; | |
1733 | goto err; | |
1734 | } | |
1735 | ret = knav_setup_queue_pools(kdev, queue_pools); | |
1736 | of_node_put(queue_pools); | |
1737 | if (ret) | |
1738 | goto err; | |
1739 | ||
1740 | ret = knav_get_link_ram(kdev, "linkram0", &kdev->link_rams[0]); | |
1741 | if (ret) { | |
1742 | dev_err(kdev->dev, "could not setup linking ram\n"); | |
1743 | goto err; | |
1744 | } | |
1745 | ||
1746 | ret = knav_get_link_ram(kdev, "linkram1", &kdev->link_rams[1]); | |
1747 | if (ret) { | |
1748 | /* | |
1749 | * nothing really, we have one linking ram already, so we just | |
1750 | * live within our means | |
1751 | */ | |
1752 | } | |
1753 | ||
1754 | ret = knav_queue_setup_link_ram(kdev); | |
1755 | if (ret) | |
1756 | goto err; | |
1757 | ||
1758 | regions = of_get_child_by_name(node, "descriptor-regions"); | |
1759 | if (!regions) { | |
1760 | dev_err(dev, "descriptor-regions not specified\n"); | |
1761 | goto err; | |
1762 | } | |
1763 | ret = knav_queue_setup_regions(kdev, regions); | |
1764 | of_node_put(regions); | |
1765 | if (ret) | |
1766 | goto err; | |
1767 | ||
1768 | ret = knav_queue_init_queues(kdev); | |
1769 | if (ret < 0) { | |
1770 | dev_err(dev, "hwqueue initialization failed\n"); | |
1771 | goto err; | |
1772 | } | |
1773 | ||
1774 | debugfs_create_file("qmss", S_IFREG | S_IRUGO, NULL, NULL, | |
1775 | &knav_queue_debug_ops); | |
1776 | return 0; | |
1777 | ||
1778 | err: | |
1779 | knav_queue_stop_pdsps(kdev); | |
1780 | knav_queue_free_regions(kdev); | |
1781 | knav_free_queue_ranges(kdev); | |
1782 | pm_runtime_put_sync(&pdev->dev); | |
1783 | pm_runtime_disable(&pdev->dev); | |
1784 | return ret; | |
1785 | } | |
1786 | ||
1787 | static int knav_queue_remove(struct platform_device *pdev) | |
1788 | { | |
1789 | /* TODO: Free resources */ | |
1790 | pm_runtime_put_sync(&pdev->dev); | |
1791 | pm_runtime_disable(&pdev->dev); | |
1792 | return 0; | |
1793 | } | |
1794 | ||
1795 | /* Match table for of_platform binding */ | |
1796 | static struct of_device_id keystone_qmss_of_match[] = { | |
1797 | { .compatible = "ti,keystone-navigator-qmss", }, | |
1798 | {}, | |
1799 | }; | |
1800 | MODULE_DEVICE_TABLE(of, keystone_qmss_of_match); | |
1801 | ||
1802 | static struct platform_driver keystone_qmss_driver = { | |
1803 | .probe = knav_queue_probe, | |
1804 | .remove = knav_queue_remove, | |
1805 | .driver = { | |
1806 | .name = "keystone-navigator-qmss", | |
1807 | .owner = THIS_MODULE, | |
1808 | .of_match_table = keystone_qmss_of_match, | |
1809 | }, | |
1810 | }; | |
1811 | module_platform_driver(keystone_qmss_driver); | |
1812 | ||
1813 | MODULE_LICENSE("GPL v2"); | |
1814 | MODULE_DESCRIPTION("TI QMSS driver for Keystone SOCs"); | |
1815 | MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com>"); | |
1816 | MODULE_AUTHOR("Santosh Shilimkar <santosh.shilimkar@ti.com>"); |