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WIP FPC-III support
[linux/fpc-iii.git] / drivers / soc / ti / knav_qmss_queue.c
blob2e521f1eda96f8d110d7d51270bb446fe601100c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Keystone Queue Manager subsystem driver
4 *
5 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
6 * Authors: Sandeep Nair <sandeep_n@ti.com>
7 * Cyril Chemparathy <cyril@ti.com>
8 * Santosh Shilimkar <santosh.shilimkar@ti.com>
9 */
10
11 #include <linux/debugfs.h>
12 #include <linux/dma-mapping.h>
13 #include <linux/firmware.h>
14 #include <linux/interrupt.h>
15 #include <linux/io.h>
16 #include <linux/module.h>
17 #include <linux/of_address.h>
18 #include <linux/of_device.h>
19 #include <linux/of_irq.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/slab.h>
22 #include <linux/soc/ti/knav_qmss.h>
23
24 #include "knav_qmss.h"
25
26 static struct knav_device *kdev;
27 static DEFINE_MUTEX(knav_dev_lock);
28 #define knav_dev_lock_held() \
29 lockdep_is_held(&knav_dev_lock)
30
31 /* Queue manager register indices in DTS */
32 #define KNAV_QUEUE_PEEK_REG_INDEX 0
33 #define KNAV_QUEUE_STATUS_REG_INDEX 1
34 #define KNAV_QUEUE_CONFIG_REG_INDEX 2
35 #define KNAV_QUEUE_REGION_REG_INDEX 3
36 #define KNAV_QUEUE_PUSH_REG_INDEX 4
37 #define KNAV_QUEUE_POP_REG_INDEX 5
38
39 /* Queue manager register indices in DTS for QMSS in K2G NAVSS.
40 * There are no status and vbusm push registers on this version
41 * of QMSS. Push registers are same as pop, So all indices above 1
42 * are to be re-defined
43 */
44 #define KNAV_L_QUEUE_CONFIG_REG_INDEX 1
45 #define KNAV_L_QUEUE_REGION_REG_INDEX 2
46 #define KNAV_L_QUEUE_PUSH_REG_INDEX 3
47
48 /* PDSP register indices in DTS */
49 #define KNAV_QUEUE_PDSP_IRAM_REG_INDEX 0
50 #define KNAV_QUEUE_PDSP_REGS_REG_INDEX 1
51 #define KNAV_QUEUE_PDSP_INTD_REG_INDEX 2
52 #define KNAV_QUEUE_PDSP_CMD_REG_INDEX 3
53
54 #define knav_queue_idx_to_inst(kdev, idx) \
55 (kdev->instances + (idx << kdev->inst_shift))
56
57 #define for_each_handle_rcu(qh, inst) \
58 list_for_each_entry_rcu(qh, &inst->handles, list, \
59 knav_dev_lock_held())
60
61 #define for_each_instance(idx, inst, kdev) \
62 for (idx = 0, inst = kdev->instances; \
63 idx < (kdev)->num_queues_in_use; \
64 idx++, inst = knav_queue_idx_to_inst(kdev, idx))
65
66 /* All firmware file names end up here. List the firmware file names below.
67 * Newest followed by older ones. Search is done from start of the array
68 * until a firmware file is found.
69 */
70 const char *knav_acc_firmwares[] = {"ks2_qmss_pdsp_acc48.bin"};
71
72 static bool device_ready;
73 bool knav_qmss_device_ready(void)
74 {
75 return device_ready;
76 }
77 EXPORT_SYMBOL_GPL(knav_qmss_device_ready);
78
79 /**
80 * knav_queue_notify: qmss queue notfier call
81 *
82 * @inst: - qmss queue instance like accumulator
83 */
84 void knav_queue_notify(struct knav_queue_inst *inst)
85 {
86 struct knav_queue *qh;
87
88 if (!inst)
89 return;
90
91 rcu_read_lock();
92 for_each_handle_rcu(qh, inst) {
93 if (atomic_read(&qh->notifier_enabled) <= 0)
94 continue;
95 if (WARN_ON(!qh->notifier_fn))
96 continue;
97 this_cpu_inc(qh->stats->notifies);
98 qh->notifier_fn(qh->notifier_fn_arg);
99 }
100 rcu_read_unlock();
101 }
102 EXPORT_SYMBOL_GPL(knav_queue_notify);
103
104 static irqreturn_t knav_queue_int_handler(int irq, void *_instdata)
105 {
106 struct knav_queue_inst *inst = _instdata;
107
108 knav_queue_notify(inst);
109 return IRQ_HANDLED;
110 }
111
112 static int knav_queue_setup_irq(struct knav_range_info *range,
113 struct knav_queue_inst *inst)
114 {
115 unsigned queue = inst->id - range->queue_base;
116 int ret = 0, irq;
117
118 if (range->flags & RANGE_HAS_IRQ) {
119 irq = range->irqs[queue].irq;
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 (range->irqs[queue].cpu_mask) {
126 ret = irq_set_affinity_hint(irq, range->irqs[queue].cpu_mask);
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->stats = alloc_percpu(struct knav_queue_stats);
227 if (!qh->stats) {
228 ret = -ENOMEM;
229 goto err;
230 }
231
232 qh->flags = flags;
233 qh->inst = inst;
234 id = inst->id - inst->qmgr->start_queue;
235 qh->reg_push = &inst->qmgr->reg_push[id];
236 qh->reg_pop = &inst->qmgr->reg_pop[id];
237 qh->reg_peek = &inst->qmgr->reg_peek[id];
238
239 /* first opener? */
240 if (!knav_queue_is_busy(inst)) {
241 struct knav_range_info *range = inst->range;
242
243 inst->name = kstrndup(name, KNAV_NAME_SIZE - 1, GFP_KERNEL);
244 if (range->ops && range->ops->open_queue)
245 ret = range->ops->open_queue(range, inst, flags);
246
247 if (ret)
248 goto err;
249 }
250 list_add_tail_rcu(&qh->list, &inst->handles);
251 return qh;
252
253 err:
254 if (qh->stats)
255 free_percpu(qh->stats);
256 devm_kfree(inst->kdev->dev, qh);
257 return ERR_PTR(ret);
258 }
259
260 static struct knav_queue *
261 knav_queue_open_by_id(const char *name, unsigned id, unsigned flags)
262 {
263 struct knav_queue_inst *inst;
264 struct knav_queue *qh;
265
266 mutex_lock(&knav_dev_lock);
267
268 qh = ERR_PTR(-ENODEV);
269 inst = knav_queue_find_by_id(id);
270 if (!inst)
271 goto unlock_ret;
272
273 qh = ERR_PTR(-EEXIST);
274 if (!(flags & KNAV_QUEUE_SHARED) && knav_queue_is_busy(inst))
275 goto unlock_ret;
276
277 qh = ERR_PTR(-EBUSY);
278 if ((flags & KNAV_QUEUE_SHARED) &&
279 (knav_queue_is_busy(inst) && !knav_queue_is_shared(inst)))
280 goto unlock_ret;
281
282 qh = __knav_queue_open(inst, name, flags);
283
284 unlock_ret:
285 mutex_unlock(&knav_dev_lock);
286
287 return qh;
288 }
289
290 static struct knav_queue *knav_queue_open_by_type(const char *name,
291 unsigned type, unsigned flags)
292 {
293 struct knav_queue_inst *inst;
294 struct knav_queue *qh = ERR_PTR(-EINVAL);
295 int idx;
296
297 mutex_lock(&knav_dev_lock);
298
299 for_each_instance(idx, inst, kdev) {
300 if (knav_queue_is_reserved(inst))
301 continue;
302 if (!knav_queue_match_type(inst, type))
303 continue;
304 if (knav_queue_is_busy(inst))
305 continue;
306 qh = __knav_queue_open(inst, name, flags);
307 goto unlock_ret;
308 }
309
310 unlock_ret:
311 mutex_unlock(&knav_dev_lock);
312 return qh;
313 }
314
315 static void knav_queue_set_notify(struct knav_queue_inst *inst, bool enabled)
316 {
317 struct knav_range_info *range = inst->range;
318
319 if (range->ops && range->ops->set_notify)
320 range->ops->set_notify(range, inst, enabled);
321 }
322
323 static int knav_queue_enable_notifier(struct knav_queue *qh)
324 {
325 struct knav_queue_inst *inst = qh->inst;
326 bool first;
327
328 if (WARN_ON(!qh->notifier_fn))
329 return -EINVAL;
330
331 /* Adjust the per handle notifier count */
332 first = (atomic_inc_return(&qh->notifier_enabled) == 1);
333 if (!first)
334 return 0; /* nothing to do */
335
336 /* Now adjust the per instance notifier count */
337 first = (atomic_inc_return(&inst->num_notifiers) == 1);
338 if (first)
339 knav_queue_set_notify(inst, true);
340
341 return 0;
342 }
343
344 static int knav_queue_disable_notifier(struct knav_queue *qh)
345 {
346 struct knav_queue_inst *inst = qh->inst;
347 bool last;
348
349 last = (atomic_dec_return(&qh->notifier_enabled) == 0);
350 if (!last)
351 return 0; /* nothing to do */
352
353 last = (atomic_dec_return(&inst->num_notifiers) == 0);
354 if (last)
355 knav_queue_set_notify(inst, false);
356
357 return 0;
358 }
359
360 static int knav_queue_set_notifier(struct knav_queue *qh,
361 struct knav_queue_notify_config *cfg)
362 {
363 knav_queue_notify_fn old_fn = qh->notifier_fn;
364
365 if (!cfg)
366 return -EINVAL;
367
368 if (!(qh->inst->range->flags & (RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ)))
369 return -ENOTSUPP;
370
371 if (!cfg->fn && old_fn)
372 knav_queue_disable_notifier(qh);
373
374 qh->notifier_fn = cfg->fn;
375 qh->notifier_fn_arg = cfg->fn_arg;
376
377 if (cfg->fn && !old_fn)
378 knav_queue_enable_notifier(qh);
379
380 return 0;
381 }
382
383 static int knav_gp_set_notify(struct knav_range_info *range,
384 struct knav_queue_inst *inst,
385 bool enabled)
386 {
387 unsigned queue;
388
389 if (range->flags & RANGE_HAS_IRQ) {
390 queue = inst->id - range->queue_base;
391 if (enabled)
392 enable_irq(range->irqs[queue].irq);
393 else
394 disable_irq_nosync(range->irqs[queue].irq);
395 }
396 return 0;
397 }
398
399 static int knav_gp_open_queue(struct knav_range_info *range,
400 struct knav_queue_inst *inst, unsigned flags)
401 {
402 return knav_queue_setup_irq(range, inst);
403 }
404
405 static int knav_gp_close_queue(struct knav_range_info *range,
406 struct knav_queue_inst *inst)
407 {
408 knav_queue_free_irq(inst);
409 return 0;
410 }
411
412 static struct knav_range_ops knav_gp_range_ops = {
413 .set_notify = knav_gp_set_notify,
414 .open_queue = knav_gp_open_queue,
415 .close_queue = knav_gp_close_queue,
416 };
417
418
419 static int knav_queue_get_count(void *qhandle)
420 {
421 struct knav_queue *qh = qhandle;
422 struct knav_queue_inst *inst = qh->inst;
423
424 return readl_relaxed(&qh->reg_peek[0].entry_count) +
425 atomic_read(&inst->desc_count);
426 }
427
428 static void knav_queue_debug_show_instance(struct seq_file *s,
429 struct knav_queue_inst *inst)
430 {
431 struct knav_device *kdev = inst->kdev;
432 struct knav_queue *qh;
433 int cpu = 0;
434 int pushes = 0;
435 int pops = 0;
436 int push_errors = 0;
437 int pop_errors = 0;
438 int notifies = 0;
439
440 if (!knav_queue_is_busy(inst))
441 return;
442
443 seq_printf(s, "\tqueue id %d (%s)\n",
444 kdev->base_id + inst->id, inst->name);
445 for_each_handle_rcu(qh, inst) {
446 for_each_possible_cpu(cpu) {
447 pushes += per_cpu_ptr(qh->stats, cpu)->pushes;
448 pops += per_cpu_ptr(qh->stats, cpu)->pops;
449 push_errors += per_cpu_ptr(qh->stats, cpu)->push_errors;
450 pop_errors += per_cpu_ptr(qh->stats, cpu)->pop_errors;
451 notifies += per_cpu_ptr(qh->stats, cpu)->notifies;
452 }
453
454 seq_printf(s, "\t\thandle %p: pushes %8d, pops %8d, count %8d, notifies %8d, push errors %8d, pop errors %8d\n",
455 qh,
456 pushes,
457 pops,
458 knav_queue_get_count(qh),
459 notifies,
460 push_errors,
461 pop_errors);
462 }
463 }
464
465 static int knav_queue_debug_show(struct seq_file *s, void *v)
466 {
467 struct knav_queue_inst *inst;
468 int idx;
469
470 mutex_lock(&knav_dev_lock);
471 seq_printf(s, "%s: %u-%u\n",
472 dev_name(kdev->dev), kdev->base_id,
473 kdev->base_id + kdev->num_queues - 1);
474 for_each_instance(idx, inst, kdev)
475 knav_queue_debug_show_instance(s, inst);
476 mutex_unlock(&knav_dev_lock);
477
478 return 0;
479 }
480
481 DEFINE_SHOW_ATTRIBUTE(knav_queue_debug);
482
483 static inline int knav_queue_pdsp_wait(u32 * __iomem addr, unsigned timeout,
484 u32 flags)
485 {
486 unsigned long end;
487 u32 val = 0;
488
489 end = jiffies + msecs_to_jiffies(timeout);
490 while (time_after(end, jiffies)) {
491 val = readl_relaxed(addr);
492 if (flags)
493 val &= flags;
494 if (!val)
495 break;
496 cpu_relax();
497 }
498 return val ? -ETIMEDOUT : 0;
499 }
500
501
502 static int knav_queue_flush(struct knav_queue *qh)
503 {
504 struct knav_queue_inst *inst = qh->inst;
505 unsigned id = inst->id - inst->qmgr->start_queue;
506
507 atomic_set(&inst->desc_count, 0);
508 writel_relaxed(0, &inst->qmgr->reg_push[id].ptr_size_thresh);
509 return 0;
510 }
511
512 /**
513 * knav_queue_open() - open a hardware queue
514 * @name: - name to give the queue handle
515 * @id: - desired queue number if any or specifes the type
516 * of queue
517 * @flags: - the following flags are applicable to queues:
518 * KNAV_QUEUE_SHARED - allow the queue to be shared. Queues are
519 * exclusive by default.
520 * Subsequent attempts to open a shared queue should
521 * also have this flag.
522 *
523 * Returns a handle to the open hardware queue if successful. Use IS_ERR()
524 * to check the returned value for error codes.
525 */
526 void *knav_queue_open(const char *name, unsigned id,
527 unsigned flags)
528 {
529 struct knav_queue *qh = ERR_PTR(-EINVAL);
530
531 switch (id) {
532 case KNAV_QUEUE_QPEND:
533 case KNAV_QUEUE_ACC:
534 case KNAV_QUEUE_GP:
535 qh = knav_queue_open_by_type(name, id, flags);
536 break;
537
538 default:
539 qh = knav_queue_open_by_id(name, id, flags);
540 break;
541 }
542 return qh;
543 }
544 EXPORT_SYMBOL_GPL(knav_queue_open);
545
546 /**
547 * knav_queue_close() - close a hardware queue handle
548 * @qhandle: - handle to close
549 */
550 void knav_queue_close(void *qhandle)
551 {
552 struct knav_queue *qh = qhandle;
553 struct knav_queue_inst *inst = qh->inst;
554
555 while (atomic_read(&qh->notifier_enabled) > 0)
556 knav_queue_disable_notifier(qh);
557
558 mutex_lock(&knav_dev_lock);
559 list_del_rcu(&qh->list);
560 mutex_unlock(&knav_dev_lock);
561 synchronize_rcu();
562 if (!knav_queue_is_busy(inst)) {
563 struct knav_range_info *range = inst->range;
564
565 if (range->ops && range->ops->close_queue)
566 range->ops->close_queue(range, inst);
567 }
568 free_percpu(qh->stats);
569 devm_kfree(inst->kdev->dev, qh);
570 }
571 EXPORT_SYMBOL_GPL(knav_queue_close);
572
573 /**
574 * knav_queue_device_control() - Perform control operations on a queue
575 * @qhandle: - queue handle
576 * @cmd: - control commands
577 * @arg: - command argument
578 *
579 * Returns 0 on success, errno otherwise.
580 */
581 int knav_queue_device_control(void *qhandle, enum knav_queue_ctrl_cmd cmd,
582 unsigned long arg)
583 {
584 struct knav_queue *qh = qhandle;
585 struct knav_queue_notify_config *cfg;
586 int ret;
587
588 switch ((int)cmd) {
589 case KNAV_QUEUE_GET_ID:
590 ret = qh->inst->kdev->base_id + qh->inst->id;
591 break;
592
593 case KNAV_QUEUE_FLUSH:
594 ret = knav_queue_flush(qh);
595 break;
596
597 case KNAV_QUEUE_SET_NOTIFIER:
598 cfg = (void *)arg;
599 ret = knav_queue_set_notifier(qh, cfg);
600 break;
601
602 case KNAV_QUEUE_ENABLE_NOTIFY:
603 ret = knav_queue_enable_notifier(qh);
604 break;
605
606 case KNAV_QUEUE_DISABLE_NOTIFY:
607 ret = knav_queue_disable_notifier(qh);
608 break;
609
610 case KNAV_QUEUE_GET_COUNT:
611 ret = knav_queue_get_count(qh);
612 break;
613
614 default:
615 ret = -ENOTSUPP;
616 break;
617 }
618 return ret;
619 }
620 EXPORT_SYMBOL_GPL(knav_queue_device_control);
621
622
623
624 /**
625 * knav_queue_push() - push data (or descriptor) to the tail of a queue
626 * @qhandle: - hardware queue handle
627 * @dma: - DMA data to push
628 * @size: - size of data to push
629 * @flags: - can be used to pass additional information
630 *
631 * Returns 0 on success, errno otherwise.
632 */
633 int knav_queue_push(void *qhandle, dma_addr_t dma,
634 unsigned size, unsigned flags)
635 {
636 struct knav_queue *qh = qhandle;
637 u32 val;
638
639 val = (u32)dma | ((size / 16) - 1);
640 writel_relaxed(val, &qh->reg_push[0].ptr_size_thresh);
641
642 this_cpu_inc(qh->stats->pushes);
643 return 0;
644 }
645 EXPORT_SYMBOL_GPL(knav_queue_push);
646
647 /**
648 * knav_queue_pop() - pop data (or descriptor) from the head of a queue
649 * @qhandle: - hardware queue handle
650 * @size: - (optional) size of the data pop'ed.
651 *
652 * Returns a DMA address on success, 0 on failure.
653 */
654 dma_addr_t knav_queue_pop(void *qhandle, unsigned *size)
655 {
656 struct knav_queue *qh = qhandle;
657 struct knav_queue_inst *inst = qh->inst;
658 dma_addr_t dma;
659 u32 val, idx;
660
661 /* are we accumulated? */
662 if (inst->descs) {
663 if (unlikely(atomic_dec_return(&inst->desc_count) < 0)) {
664 atomic_inc(&inst->desc_count);
665 return 0;
666 }
667 idx = atomic_inc_return(&inst->desc_head);
668 idx &= ACC_DESCS_MASK;
669 val = inst->descs[idx];
670 } else {
671 val = readl_relaxed(&qh->reg_pop[0].ptr_size_thresh);
672 if (unlikely(!val))
673 return 0;
674 }
675
676 dma = val & DESC_PTR_MASK;
677 if (size)
678 *size = ((val & DESC_SIZE_MASK) + 1) * 16;
679
680 this_cpu_inc(qh->stats->pops);
681 return dma;
682 }
683 EXPORT_SYMBOL_GPL(knav_queue_pop);
684
685 /* carve out descriptors and push into queue */
686 static void kdesc_fill_pool(struct knav_pool *pool)
687 {
688 struct knav_region *region;
689 int i;
690
691 region = pool->region;
692 pool->desc_size = region->desc_size;
693 for (i = 0; i < pool->num_desc; i++) {
694 int index = pool->region_offset + i;
695 dma_addr_t dma_addr;
696 unsigned dma_size;
697 dma_addr = region->dma_start + (region->desc_size * index);
698 dma_size = ALIGN(pool->desc_size, SMP_CACHE_BYTES);
699 dma_sync_single_for_device(pool->dev, dma_addr, dma_size,
700 DMA_TO_DEVICE);
701 knav_queue_push(pool->queue, dma_addr, dma_size, 0);
702 }
703 }
704
705 /* pop out descriptors and close the queue */
706 static void kdesc_empty_pool(struct knav_pool *pool)
707 {
708 dma_addr_t dma;
709 unsigned size;
710 void *desc;
711 int i;
712
713 if (!pool->queue)
714 return;
715
716 for (i = 0;; i++) {
717 dma = knav_queue_pop(pool->queue, &size);
718 if (!dma)
719 break;
720 desc = knav_pool_desc_dma_to_virt(pool, dma);
721 if (!desc) {
722 dev_dbg(pool->kdev->dev,
723 "couldn't unmap desc, continuing\n");
724 continue;
725 }
726 }
727 WARN_ON(i != pool->num_desc);
728 knav_queue_close(pool->queue);
729 }
730
731
732 /* Get the DMA address of a descriptor */
733 dma_addr_t knav_pool_desc_virt_to_dma(void *ph, void *virt)
734 {
735 struct knav_pool *pool = ph;
736 return pool->region->dma_start + (virt - pool->region->virt_start);
737 }
738 EXPORT_SYMBOL_GPL(knav_pool_desc_virt_to_dma);
739
740 void *knav_pool_desc_dma_to_virt(void *ph, dma_addr_t dma)
741 {
742 struct knav_pool *pool = ph;
743 return pool->region->virt_start + (dma - pool->region->dma_start);
744 }
745 EXPORT_SYMBOL_GPL(knav_pool_desc_dma_to_virt);
746
747 /**
748 * knav_pool_create() - Create a pool of descriptors
749 * @name: - name to give the pool handle
750 * @num_desc: - numbers of descriptors in the pool
751 * @region_id: - QMSS region id from which the descriptors are to be
752 * allocated.
753 *
754 * Returns a pool handle on success.
755 * Use IS_ERR_OR_NULL() to identify error values on return.
756 */
757 void *knav_pool_create(const char *name,
758 int num_desc, int region_id)
759 {
760 struct knav_region *reg_itr, *region = NULL;
761 struct knav_pool *pool, *pi;
762 struct list_head *node;
763 unsigned last_offset;
764 bool slot_found;
765 int ret;
766
767 if (!kdev)
768 return ERR_PTR(-EPROBE_DEFER);
769
770 if (!kdev->dev)
771 return ERR_PTR(-ENODEV);
772
773 pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL);
774 if (!pool) {
775 dev_err(kdev->dev, "out of memory allocating pool\n");
776 return ERR_PTR(-ENOMEM);
777 }
778
779 for_each_region(kdev, reg_itr) {
780 if (reg_itr->id != region_id)
781 continue;
782 region = reg_itr;
783 break;
784 }
785
786 if (!region) {
787 dev_err(kdev->dev, "region-id(%d) not found\n", region_id);
788 ret = -EINVAL;
789 goto err;
790 }
791
792 pool->queue = knav_queue_open(name, KNAV_QUEUE_GP, 0);
793 if (IS_ERR_OR_NULL(pool->queue)) {
794 dev_err(kdev->dev,
795 "failed to open queue for pool(%s), error %ld\n",
796 name, PTR_ERR(pool->queue));
797 ret = PTR_ERR(pool->queue);
798 goto err;
799 }
800
801 pool->name = kstrndup(name, KNAV_NAME_SIZE - 1, GFP_KERNEL);
802 pool->kdev = kdev;
803 pool->dev = kdev->dev;
804
805 mutex_lock(&knav_dev_lock);
806
807 if (num_desc > (region->num_desc - region->used_desc)) {
808 dev_err(kdev->dev, "out of descs in region(%d) for pool(%s)\n",
809 region_id, name);
810 ret = -ENOMEM;
811 goto err_unlock;
812 }
813
814 /* Region maintains a sorted (by region offset) list of pools
815 * use the first free slot which is large enough to accomodate
816 * the request
817 */
818 last_offset = 0;
819 slot_found = false;
820 node = &region->pools;
821 list_for_each_entry(pi, &region->pools, region_inst) {
822 if ((pi->region_offset - last_offset) >= num_desc) {
823 slot_found = true;
824 break;
825 }
826 last_offset = pi->region_offset + pi->num_desc;
827 }
828 node = &pi->region_inst;
829
830 if (slot_found) {
831 pool->region = region;
832 pool->num_desc = num_desc;
833 pool->region_offset = last_offset;
834 region->used_desc += num_desc;
835 list_add_tail(&pool->list, &kdev->pools);
836 list_add_tail(&pool->region_inst, node);
837 } else {
838 dev_err(kdev->dev, "pool(%s) create failed: fragmented desc pool in region(%d)\n",
839 name, region_id);
840 ret = -ENOMEM;
841 goto err_unlock;
842 }
843
844 mutex_unlock(&knav_dev_lock);
845 kdesc_fill_pool(pool);
846 return pool;
847
848 err_unlock:
849 mutex_unlock(&knav_dev_lock);
850 err:
851 kfree(pool->name);
852 devm_kfree(kdev->dev, pool);
853 return ERR_PTR(ret);
854 }
855 EXPORT_SYMBOL_GPL(knav_pool_create);
856
857 /**
858 * knav_pool_destroy() - Free a pool of descriptors
859 * @ph: - pool handle
860 */
861 void knav_pool_destroy(void *ph)
862 {
863 struct knav_pool *pool = ph;
864
865 if (!pool)
866 return;
867
868 if (!pool->region)
869 return;
870
871 kdesc_empty_pool(pool);
872 mutex_lock(&knav_dev_lock);
873
874 pool->region->used_desc -= pool->num_desc;
875 list_del(&pool->region_inst);
876 list_del(&pool->list);
877
878 mutex_unlock(&knav_dev_lock);
879 kfree(pool->name);
880 devm_kfree(kdev->dev, pool);
881 }
882 EXPORT_SYMBOL_GPL(knav_pool_destroy);
883
884
885 /**
886 * knav_pool_desc_get() - Get a descriptor from the pool
887 * @ph: - pool handle
888 *
889 * Returns descriptor from the pool.
890 */
891 void *knav_pool_desc_get(void *ph)
892 {
893 struct knav_pool *pool = ph;
894 dma_addr_t dma;
895 unsigned size;
896 void *data;
897
898 dma = knav_queue_pop(pool->queue, &size);
899 if (unlikely(!dma))
900 return ERR_PTR(-ENOMEM);
901 data = knav_pool_desc_dma_to_virt(pool, dma);
902 return data;
903 }
904 EXPORT_SYMBOL_GPL(knav_pool_desc_get);
905
906 /**
907 * knav_pool_desc_put() - return a descriptor to the pool
908 * @ph: - pool handle
909 * @desc: - virtual address
910 */
911 void knav_pool_desc_put(void *ph, void *desc)
912 {
913 struct knav_pool *pool = ph;
914 dma_addr_t dma;
915 dma = knav_pool_desc_virt_to_dma(pool, desc);
916 knav_queue_push(pool->queue, dma, pool->region->desc_size, 0);
917 }
918 EXPORT_SYMBOL_GPL(knav_pool_desc_put);
919
920 /**
921 * knav_pool_desc_map() - Map descriptor for DMA transfer
922 * @ph: - pool handle
923 * @desc: - address of descriptor to map
924 * @size: - size of descriptor to map
925 * @dma: - DMA address return pointer
926 * @dma_sz: - adjusted return pointer
927 *
928 * Returns 0 on success, errno otherwise.
929 */
930 int knav_pool_desc_map(void *ph, void *desc, unsigned size,
931 dma_addr_t *dma, unsigned *dma_sz)
932 {
933 struct knav_pool *pool = ph;
934 *dma = knav_pool_desc_virt_to_dma(pool, desc);
935 size = min(size, pool->region->desc_size);
936 size = ALIGN(size, SMP_CACHE_BYTES);
937 *dma_sz = size;
938 dma_sync_single_for_device(pool->dev, *dma, size, DMA_TO_DEVICE);
939
940 /* Ensure the descriptor reaches to the memory */
941 __iowmb();
942
943 return 0;
944 }
945 EXPORT_SYMBOL_GPL(knav_pool_desc_map);
946
947 /**
948 * knav_pool_desc_unmap() - Unmap descriptor after DMA transfer
949 * @ph: - pool handle
950 * @dma: - DMA address of descriptor to unmap
951 * @dma_sz: - size of descriptor to unmap
952 *
953 * Returns descriptor address on success, Use IS_ERR_OR_NULL() to identify
954 * error values on return.
955 */
956 void *knav_pool_desc_unmap(void *ph, dma_addr_t dma, unsigned dma_sz)
957 {
958 struct knav_pool *pool = ph;
959 unsigned desc_sz;
960 void *desc;
961
962 desc_sz = min(dma_sz, pool->region->desc_size);
963 desc = knav_pool_desc_dma_to_virt(pool, dma);
964 dma_sync_single_for_cpu(pool->dev, dma, desc_sz, DMA_FROM_DEVICE);
965 prefetch(desc);
966 return desc;
967 }
968 EXPORT_SYMBOL_GPL(knav_pool_desc_unmap);
969
970 /**
971 * knav_pool_count() - Get the number of descriptors in pool.
972 * @ph: - pool handle
973 * Returns number of elements in the pool.
974 */
975 int knav_pool_count(void *ph)
976 {
977 struct knav_pool *pool = ph;
978 return knav_queue_get_count(pool->queue);
979 }
980 EXPORT_SYMBOL_GPL(knav_pool_count);
981
982 static void knav_queue_setup_region(struct knav_device *kdev,
983 struct knav_region *region)
984 {
985 unsigned hw_num_desc, hw_desc_size, size;
986 struct knav_reg_region __iomem *regs;
987 struct knav_qmgr_info *qmgr;
988 struct knav_pool *pool;
989 int id = region->id;
990 struct page *page;
991
992 /* unused region? */
993 if (!region->num_desc) {
994 dev_warn(kdev->dev, "unused region %s\n", region->name);
995 return;
996 }
997
998 /* get hardware descriptor value */
999 hw_num_desc = ilog2(region->num_desc - 1) + 1;
1000
1001 /* did we force fit ourselves into nothingness? */
1002 if (region->num_desc < 32) {
1003 region->num_desc = 0;
1004 dev_warn(kdev->dev, "too few descriptors in region %s\n",
1005 region->name);
1006 return;
1007 }
1008
1009 size = region->num_desc * region->desc_size;
1010 region->virt_start = alloc_pages_exact(size, GFP_KERNEL | GFP_DMA |
1011 GFP_DMA32);
1012 if (!region->virt_start) {
1013 region->num_desc = 0;
1014 dev_err(kdev->dev, "memory alloc failed for region %s\n",
1015 region->name);
1016 return;
1017 }
1018 region->virt_end = region->virt_start + size;
1019 page = virt_to_page(region->virt_start);
1020
1021 region->dma_start = dma_map_page(kdev->dev, page, 0, size,
1022 DMA_BIDIRECTIONAL);
1023 if (dma_mapping_error(kdev->dev, region->dma_start)) {
1024 dev_err(kdev->dev, "dma map failed for region %s\n",
1025 region->name);
1026 goto fail;
1027 }
1028 region->dma_end = region->dma_start + size;
1029
1030 pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL);
1031 if (!pool) {
1032 dev_err(kdev->dev, "out of memory allocating dummy pool\n");
1033 goto fail;
1034 }
1035 pool->num_desc = 0;
1036 pool->region_offset = region->num_desc;
1037 list_add(&pool->region_inst, &region->pools);
1038
1039 dev_dbg(kdev->dev,
1040 "region %s (%d): size:%d, link:%d@%d, dma:%pad-%pad, virt:%p-%p\n",
1041 region->name, id, region->desc_size, region->num_desc,
1042 region->link_index, &region->dma_start, &region->dma_end,
1043 region->virt_start, region->virt_end);
1044
1045 hw_desc_size = (region->desc_size / 16) - 1;
1046 hw_num_desc -= 5;
1047
1048 for_each_qmgr(kdev, qmgr) {
1049 regs = qmgr->reg_region + id;
1050 writel_relaxed((u32)region->dma_start, &regs->base);
1051 writel_relaxed(region->link_index, &regs->start_index);
1052 writel_relaxed(hw_desc_size << 16 | hw_num_desc,
1053 &regs->size_count);
1054 }
1055 return;
1056
1057 fail:
1058 if (region->dma_start)
1059 dma_unmap_page(kdev->dev, region->dma_start, size,
1060 DMA_BIDIRECTIONAL);
1061 if (region->virt_start)
1062 free_pages_exact(region->virt_start, size);
1063 region->num_desc = 0;
1064 return;
1065 }
1066
1067 static const char *knav_queue_find_name(struct device_node *node)
1068 {
1069 const char *name;
1070
1071 if (of_property_read_string(node, "label", &name) < 0)
1072 name = node->name;
1073 if (!name)
1074 name = "unknown";
1075 return name;
1076 }
1077
1078 static int knav_queue_setup_regions(struct knav_device *kdev,
1079 struct device_node *regions)
1080 {
1081 struct device *dev = kdev->dev;
1082 struct knav_region *region;
1083 struct device_node *child;
1084 u32 temp[2];
1085 int ret;
1086
1087 for_each_child_of_node(regions, child) {
1088 region = devm_kzalloc(dev, sizeof(*region), GFP_KERNEL);
1089 if (!region) {
1090 dev_err(dev, "out of memory allocating region\n");
1091 return -ENOMEM;
1092 }
1093
1094 region->name = knav_queue_find_name(child);
1095 of_property_read_u32(child, "id", &region->id);
1096 ret = of_property_read_u32_array(child, "region-spec", temp, 2);
1097 if (!ret) {
1098 region->num_desc = temp[0];
1099 region->desc_size = temp[1];
1100 } else {
1101 dev_err(dev, "invalid region info %s\n", region->name);
1102 devm_kfree(dev, region);
1103 continue;
1104 }
1105
1106 if (!of_get_property(child, "link-index", NULL)) {
1107 dev_err(dev, "No link info for %s\n", region->name);
1108 devm_kfree(dev, region);
1109 continue;
1110 }
1111 ret = of_property_read_u32(child, "link-index",
1112 &region->link_index);
1113 if (ret) {
1114 dev_err(dev, "link index not found for %s\n",
1115 region->name);
1116 devm_kfree(dev, region);
1117 continue;
1118 }
1119
1120 INIT_LIST_HEAD(&region->pools);
1121 list_add_tail(&region->list, &kdev->regions);
1122 }
1123 if (list_empty(&kdev->regions)) {
1124 dev_err(dev, "no valid region information found\n");
1125 return -ENODEV;
1126 }
1127
1128 /* Next, we run through the regions and set things up */
1129 for_each_region(kdev, region)
1130 knav_queue_setup_region(kdev, region);
1131
1132 return 0;
1133 }
1134
1135 static int knav_get_link_ram(struct knav_device *kdev,
1136 const char *name,
1137 struct knav_link_ram_block *block)
1138 {
1139 struct platform_device *pdev = to_platform_device(kdev->dev);
1140 struct device_node *node = pdev->dev.of_node;
1141 u32 temp[2];
1142
1143 /*
1144 * Note: link ram resources are specified in "entry" sized units. In
1145 * reality, although entries are ~40bits in hardware, we treat them as
1146 * 64-bit entities here.
1147 *
1148 * For example, to specify the internal link ram for Keystone-I class
1149 * devices, we would set the linkram0 resource to 0x80000-0x83fff.
1150 *
1151 * This gets a bit weird when other link rams are used. For example,
1152 * if the range specified is 0x0c000000-0x0c003fff (i.e., 16K entries
1153 * in MSMC SRAM), the actual memory used is 0x0c000000-0x0c020000,
1154 * which accounts for 64-bits per entry, for 16K entries.
1155 */
1156 if (!of_property_read_u32_array(node, name , temp, 2)) {
1157 if (temp[0]) {
1158 /*
1159 * queue_base specified => using internal or onchip
1160 * link ram WARNING - we do not "reserve" this block
1161 */
1162 block->dma = (dma_addr_t)temp[0];
1163 block->virt = NULL;
1164 block->size = temp[1];
1165 } else {
1166 block->size = temp[1];
1167 /* queue_base not specific => allocate requested size */
1168 block->virt = dmam_alloc_coherent(kdev->dev,
1169 8 * block->size, &block->dma,
1170 GFP_KERNEL);
1171 if (!block->virt) {
1172 dev_err(kdev->dev, "failed to alloc linkram\n");
1173 return -ENOMEM;
1174 }
1175 }
1176 } else {
1177 return -ENODEV;
1178 }
1179 return 0;
1180 }
1181
1182 static int knav_queue_setup_link_ram(struct knav_device *kdev)
1183 {
1184 struct knav_link_ram_block *block;
1185 struct knav_qmgr_info *qmgr;
1186
1187 for_each_qmgr(kdev, qmgr) {
1188 block = &kdev->link_rams[0];
1189 dev_dbg(kdev->dev, "linkram0: dma:%pad, virt:%p, size:%x\n",
1190 &block->dma, block->virt, block->size);
1191 writel_relaxed((u32)block->dma, &qmgr->reg_config->link_ram_base0);
1192 if (kdev->version == QMSS_66AK2G)
1193 writel_relaxed(block->size,
1194 &qmgr->reg_config->link_ram_size0);
1195 else
1196 writel_relaxed(block->size - 1,
1197 &qmgr->reg_config->link_ram_size0);
1198 block++;
1199 if (!block->size)
1200 continue;
1201
1202 dev_dbg(kdev->dev, "linkram1: dma:%pad, virt:%p, size:%x\n",
1203 &block->dma, block->virt, block->size);
1204 writel_relaxed(block->dma, &qmgr->reg_config->link_ram_base1);
1205 }
1206
1207 return 0;
1208 }
1209
1210 static int knav_setup_queue_range(struct knav_device *kdev,
1211 struct device_node *node)
1212 {
1213 struct device *dev = kdev->dev;
1214 struct knav_range_info *range;
1215 struct knav_qmgr_info *qmgr;
1216 u32 temp[2], start, end, id, index;
1217 int ret, i;
1218
1219 range = devm_kzalloc(dev, sizeof(*range), GFP_KERNEL);
1220 if (!range) {
1221 dev_err(dev, "out of memory allocating range\n");
1222 return -ENOMEM;
1223 }
1224
1225 range->kdev = kdev;
1226 range->name = knav_queue_find_name(node);
1227 ret = of_property_read_u32_array(node, "qrange", temp, 2);
1228 if (!ret) {
1229 range->queue_base = temp[0] - kdev->base_id;
1230 range->num_queues = temp[1];
1231 } else {
1232 dev_err(dev, "invalid queue range %s\n", range->name);
1233 devm_kfree(dev, range);
1234 return -EINVAL;
1235 }
1236
1237 for (i = 0; i < RANGE_MAX_IRQS; i++) {
1238 struct of_phandle_args oirq;
1239
1240 if (of_irq_parse_one(node, i, &oirq))
1241 break;
1242
1243 range->irqs[i].irq = irq_create_of_mapping(&oirq);
1244 if (range->irqs[i].irq == IRQ_NONE)
1245 break;
1246
1247 range->num_irqs++;
1248
1249 if (IS_ENABLED(CONFIG_SMP) && oirq.args_count == 3) {
1250 unsigned long mask;
1251 int bit;
1252
1253 range->irqs[i].cpu_mask = devm_kzalloc(dev,
1254 cpumask_size(), GFP_KERNEL);
1255 if (!range->irqs[i].cpu_mask)
1256 return -ENOMEM;
1257
1258 mask = (oirq.args[2] & 0x0000ff00) >> 8;
1259 for_each_set_bit(bit, &mask, BITS_PER_LONG)
1260 cpumask_set_cpu(bit, range->irqs[i].cpu_mask);
1261 }
1262 }
1263
1264 range->num_irqs = min(range->num_irqs, range->num_queues);
1265 if (range->num_irqs)
1266 range->flags |= RANGE_HAS_IRQ;
1267
1268 if (of_get_property(node, "qalloc-by-id", NULL))
1269 range->flags |= RANGE_RESERVED;
1270
1271 if (of_get_property(node, "accumulator", NULL)) {
1272 ret = knav_init_acc_range(kdev, node, range);
1273 if (ret < 0) {
1274 devm_kfree(dev, range);
1275 return ret;
1276 }
1277 } else {
1278 range->ops = &knav_gp_range_ops;
1279 }
1280
1281 /* set threshold to 1, and flush out the queues */
1282 for_each_qmgr(kdev, qmgr) {
1283 start = max(qmgr->start_queue, range->queue_base);
1284 end = min(qmgr->start_queue + qmgr->num_queues,
1285 range->queue_base + range->num_queues);
1286 for (id = start; id < end; id++) {
1287 index = id - qmgr->start_queue;
1288 writel_relaxed(THRESH_GTE | 1,
1289 &qmgr->reg_peek[index].ptr_size_thresh);
1290 writel_relaxed(0,
1291 &qmgr->reg_push[index].ptr_size_thresh);
1292 }
1293 }
1294
1295 list_add_tail(&range->list, &kdev->queue_ranges);
1296 dev_dbg(dev, "added range %s: %d-%d, %d irqs%s%s%s\n",
1297 range->name, range->queue_base,
1298 range->queue_base + range->num_queues - 1,
1299 range->num_irqs,
1300 (range->flags & RANGE_HAS_IRQ) ? ", has irq" : "",
1301 (range->flags & RANGE_RESERVED) ? ", reserved" : "",
1302 (range->flags & RANGE_HAS_ACCUMULATOR) ? ", acc" : "");
1303 kdev->num_queues_in_use += range->num_queues;
1304 return 0;
1305 }
1306
1307 static int knav_setup_queue_pools(struct knav_device *kdev,
1308 struct device_node *queue_pools)
1309 {
1310 struct device_node *type, *range;
1311
1312 for_each_child_of_node(queue_pools, type) {
1313 for_each_child_of_node(type, range) {
1314 /* return value ignored, we init the rest... */
1315 knav_setup_queue_range(kdev, range);
1316 }
1317 }
1318
1319 /* ... and barf if they all failed! */
1320 if (list_empty(&kdev->queue_ranges)) {
1321 dev_err(kdev->dev, "no valid queue range found\n");
1322 return -ENODEV;
1323 }
1324 return 0;
1325 }
1326
1327 static void knav_free_queue_range(struct knav_device *kdev,
1328 struct knav_range_info *range)
1329 {
1330 if (range->ops && range->ops->free_range)
1331 range->ops->free_range(range);
1332 list_del(&range->list);
1333 devm_kfree(kdev->dev, range);
1334 }
1335
1336 static void knav_free_queue_ranges(struct knav_device *kdev)
1337 {
1338 struct knav_range_info *range;
1339
1340 for (;;) {
1341 range = first_queue_range(kdev);
1342 if (!range)
1343 break;
1344 knav_free_queue_range(kdev, range);
1345 }
1346 }
1347
1348 static void knav_queue_free_regions(struct knav_device *kdev)
1349 {
1350 struct knav_region *region;
1351 struct knav_pool *pool, *tmp;
1352 unsigned size;
1353
1354 for (;;) {
1355 region = first_region(kdev);
1356 if (!region)
1357 break;
1358 list_for_each_entry_safe(pool, tmp, &region->pools, region_inst)
1359 knav_pool_destroy(pool);
1360
1361 size = region->virt_end - region->virt_start;
1362 if (size)
1363 free_pages_exact(region->virt_start, size);
1364 list_del(&region->list);
1365 devm_kfree(kdev->dev, region);
1366 }
1367 }
1368
1369 static void __iomem *knav_queue_map_reg(struct knav_device *kdev,
1370 struct device_node *node, int index)
1371 {
1372 struct resource res;
1373 void __iomem *regs;
1374 int ret;
1375
1376 ret = of_address_to_resource(node, index, &res);
1377 if (ret) {
1378 dev_err(kdev->dev, "Can't translate of node(%pOFn) address for index(%d)\n",
1379 node, index);
1380 return ERR_PTR(ret);
1381 }
1382
1383 regs = devm_ioremap_resource(kdev->dev, &res);
1384 if (IS_ERR(regs))
1385 dev_err(kdev->dev, "Failed to map register base for index(%d) node(%pOFn)\n",
1386 index, node);
1387 return regs;
1388 }
1389
1390 static int knav_queue_init_qmgrs(struct knav_device *kdev,
1391 struct device_node *qmgrs)
1392 {
1393 struct device *dev = kdev->dev;
1394 struct knav_qmgr_info *qmgr;
1395 struct device_node *child;
1396 u32 temp[2];
1397 int ret;
1398
1399 for_each_child_of_node(qmgrs, child) {
1400 qmgr = devm_kzalloc(dev, sizeof(*qmgr), GFP_KERNEL);
1401 if (!qmgr) {
1402 dev_err(dev, "out of memory allocating qmgr\n");
1403 return -ENOMEM;
1404 }
1405
1406 ret = of_property_read_u32_array(child, "managed-queues",
1407 temp, 2);
1408 if (!ret) {
1409 qmgr->start_queue = temp[0];
1410 qmgr->num_queues = temp[1];
1411 } else {
1412 dev_err(dev, "invalid qmgr queue range\n");
1413 devm_kfree(dev, qmgr);
1414 continue;
1415 }
1416
1417 dev_info(dev, "qmgr start queue %d, number of queues %d\n",
1418 qmgr->start_queue, qmgr->num_queues);
1419
1420 qmgr->reg_peek =
1421 knav_queue_map_reg(kdev, child,
1422 KNAV_QUEUE_PEEK_REG_INDEX);
1423
1424 if (kdev->version == QMSS) {
1425 qmgr->reg_status =
1426 knav_queue_map_reg(kdev, child,
1427 KNAV_QUEUE_STATUS_REG_INDEX);
1428 }
1429
1430 qmgr->reg_config =
1431 knav_queue_map_reg(kdev, child,
1432 (kdev->version == QMSS_66AK2G) ?
1433 KNAV_L_QUEUE_CONFIG_REG_INDEX :
1434 KNAV_QUEUE_CONFIG_REG_INDEX);
1435 qmgr->reg_region =
1436 knav_queue_map_reg(kdev, child,
1437 (kdev->version == QMSS_66AK2G) ?
1438 KNAV_L_QUEUE_REGION_REG_INDEX :
1439 KNAV_QUEUE_REGION_REG_INDEX);
1440
1441 qmgr->reg_push =
1442 knav_queue_map_reg(kdev, child,
1443 (kdev->version == QMSS_66AK2G) ?
1444 KNAV_L_QUEUE_PUSH_REG_INDEX :
1445 KNAV_QUEUE_PUSH_REG_INDEX);
1446
1447 if (kdev->version == QMSS) {
1448 qmgr->reg_pop =
1449 knav_queue_map_reg(kdev, child,
1450 KNAV_QUEUE_POP_REG_INDEX);
1451 }
1452
1453 if (IS_ERR(qmgr->reg_peek) ||
1454 ((kdev->version == QMSS) &&
1455 (IS_ERR(qmgr->reg_status) || IS_ERR(qmgr->reg_pop))) ||
1456 IS_ERR(qmgr->reg_config) || IS_ERR(qmgr->reg_region) ||
1457 IS_ERR(qmgr->reg_push)) {
1458 dev_err(dev, "failed to map qmgr regs\n");
1459 if (kdev->version == QMSS) {
1460 if (!IS_ERR(qmgr->reg_status))
1461 devm_iounmap(dev, qmgr->reg_status);
1462 if (!IS_ERR(qmgr->reg_pop))
1463 devm_iounmap(dev, qmgr->reg_pop);
1464 }
1465 if (!IS_ERR(qmgr->reg_peek))
1466 devm_iounmap(dev, qmgr->reg_peek);
1467 if (!IS_ERR(qmgr->reg_config))
1468 devm_iounmap(dev, qmgr->reg_config);
1469 if (!IS_ERR(qmgr->reg_region))
1470 devm_iounmap(dev, qmgr->reg_region);
1471 if (!IS_ERR(qmgr->reg_push))
1472 devm_iounmap(dev, qmgr->reg_push);
1473 devm_kfree(dev, qmgr);
1474 continue;
1475 }
1476
1477 /* Use same push register for pop as well */
1478 if (kdev->version == QMSS_66AK2G)
1479 qmgr->reg_pop = qmgr->reg_push;
1480
1481 list_add_tail(&qmgr->list, &kdev->qmgrs);
1482 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",
1483 qmgr->start_queue, qmgr->num_queues,
1484 qmgr->reg_peek, qmgr->reg_status,
1485 qmgr->reg_config, qmgr->reg_region,
1486 qmgr->reg_push, qmgr->reg_pop);
1487 }
1488 return 0;
1489 }
1490
1491 static int knav_queue_init_pdsps(struct knav_device *kdev,
1492 struct device_node *pdsps)
1493 {
1494 struct device *dev = kdev->dev;
1495 struct knav_pdsp_info *pdsp;
1496 struct device_node *child;
1497
1498 for_each_child_of_node(pdsps, child) {
1499 pdsp = devm_kzalloc(dev, sizeof(*pdsp), GFP_KERNEL);
1500 if (!pdsp) {
1501 dev_err(dev, "out of memory allocating pdsp\n");
1502 return -ENOMEM;
1503 }
1504 pdsp->name = knav_queue_find_name(child);
1505 pdsp->iram =
1506 knav_queue_map_reg(kdev, child,
1507 KNAV_QUEUE_PDSP_IRAM_REG_INDEX);
1508 pdsp->regs =
1509 knav_queue_map_reg(kdev, child,
1510 KNAV_QUEUE_PDSP_REGS_REG_INDEX);
1511 pdsp->intd =
1512 knav_queue_map_reg(kdev, child,
1513 KNAV_QUEUE_PDSP_INTD_REG_INDEX);
1514 pdsp->command =
1515 knav_queue_map_reg(kdev, child,
1516 KNAV_QUEUE_PDSP_CMD_REG_INDEX);
1517
1518 if (IS_ERR(pdsp->command) || IS_ERR(pdsp->iram) ||
1519 IS_ERR(pdsp->regs) || IS_ERR(pdsp->intd)) {
1520 dev_err(dev, "failed to map pdsp %s regs\n",
1521 pdsp->name);
1522 if (!IS_ERR(pdsp->command))
1523 devm_iounmap(dev, pdsp->command);
1524 if (!IS_ERR(pdsp->iram))
1525 devm_iounmap(dev, pdsp->iram);
1526 if (!IS_ERR(pdsp->regs))
1527 devm_iounmap(dev, pdsp->regs);
1528 if (!IS_ERR(pdsp->intd))
1529 devm_iounmap(dev, pdsp->intd);
1530 devm_kfree(dev, pdsp);
1531 continue;
1532 }
1533 of_property_read_u32(child, "id", &pdsp->id);
1534 list_add_tail(&pdsp->list, &kdev->pdsps);
1535 dev_dbg(dev, "added pdsp %s: command %p, iram %p, regs %p, intd %p\n",
1536 pdsp->name, pdsp->command, pdsp->iram, pdsp->regs,
1537 pdsp->intd);
1538 }
1539 return 0;
1540 }
1541
1542 static int knav_queue_stop_pdsp(struct knav_device *kdev,
1543 struct knav_pdsp_info *pdsp)
1544 {
1545 u32 val, timeout = 1000;
1546 int ret;
1547
1548 val = readl_relaxed(&pdsp->regs->control) & ~PDSP_CTRL_ENABLE;
1549 writel_relaxed(val, &pdsp->regs->control);
1550 ret = knav_queue_pdsp_wait(&pdsp->regs->control, timeout,
1551 PDSP_CTRL_RUNNING);
1552 if (ret < 0) {
1553 dev_err(kdev->dev, "timed out on pdsp %s stop\n", pdsp->name);
1554 return ret;
1555 }
1556 pdsp->loaded = false;
1557 pdsp->started = false;
1558 return 0;
1559 }
1560
1561 static int knav_queue_load_pdsp(struct knav_device *kdev,
1562 struct knav_pdsp_info *pdsp)
1563 {
1564 int i, ret, fwlen;
1565 const struct firmware *fw;
1566 bool found = false;
1567 u32 *fwdata;
1568
1569 for (i = 0; i < ARRAY_SIZE(knav_acc_firmwares); i++) {
1570 if (knav_acc_firmwares[i]) {
1571 ret = request_firmware_direct(&fw,
1572 knav_acc_firmwares[i],
1573 kdev->dev);
1574 if (!ret) {
1575 found = true;
1576 break;
1577 }
1578 }
1579 }
1580
1581 if (!found) {
1582 dev_err(kdev->dev, "failed to get firmware for pdsp\n");
1583 return -ENODEV;
1584 }
1585
1586 dev_info(kdev->dev, "firmware file %s downloaded for PDSP\n",
1587 knav_acc_firmwares[i]);
1588
1589 writel_relaxed(pdsp->id + 1, pdsp->command + 0x18);
1590 /* download the firmware */
1591 fwdata = (u32 *)fw->data;
1592 fwlen = (fw->size + sizeof(u32) - 1) / sizeof(u32);
1593 for (i = 0; i < fwlen; i++)
1594 writel_relaxed(be32_to_cpu(fwdata[i]), pdsp->iram + i);
1595
1596 release_firmware(fw);
1597 return 0;
1598 }
1599
1600 static int knav_queue_start_pdsp(struct knav_device *kdev,
1601 struct knav_pdsp_info *pdsp)
1602 {
1603 u32 val, timeout = 1000;
1604 int ret;
1605
1606 /* write a command for sync */
1607 writel_relaxed(0xffffffff, pdsp->command);
1608 while (readl_relaxed(pdsp->command) != 0xffffffff)
1609 cpu_relax();
1610
1611 /* soft reset the PDSP */
1612 val = readl_relaxed(&pdsp->regs->control);
1613 val &= ~(PDSP_CTRL_PC_MASK | PDSP_CTRL_SOFT_RESET);
1614 writel_relaxed(val, &pdsp->regs->control);
1615
1616 /* enable pdsp */
1617 val = readl_relaxed(&pdsp->regs->control) | PDSP_CTRL_ENABLE;
1618 writel_relaxed(val, &pdsp->regs->control);
1619
1620 /* wait for command register to clear */
1621 ret = knav_queue_pdsp_wait(pdsp->command, timeout, 0);
1622 if (ret < 0) {
1623 dev_err(kdev->dev,
1624 "timed out on pdsp %s command register wait\n",
1625 pdsp->name);
1626 return ret;
1627 }
1628 return 0;
1629 }
1630
1631 static void knav_queue_stop_pdsps(struct knav_device *kdev)
1632 {
1633 struct knav_pdsp_info *pdsp;
1634
1635 /* disable all pdsps */
1636 for_each_pdsp(kdev, pdsp)
1637 knav_queue_stop_pdsp(kdev, pdsp);
1638 }
1639
1640 static int knav_queue_start_pdsps(struct knav_device *kdev)
1641 {
1642 struct knav_pdsp_info *pdsp;
1643 int ret;
1644
1645 knav_queue_stop_pdsps(kdev);
1646 /* now load them all. We return success even if pdsp
1647 * is not loaded as acc channels are optional on having
1648 * firmware availability in the system. We set the loaded
1649 * and stated flag and when initialize the acc range, check
1650 * it and init the range only if pdsp is started.
1651 */
1652 for_each_pdsp(kdev, pdsp) {
1653 ret = knav_queue_load_pdsp(kdev, pdsp);
1654 if (!ret)
1655 pdsp->loaded = true;
1656 }
1657
1658 for_each_pdsp(kdev, pdsp) {
1659 if (pdsp->loaded) {
1660 ret = knav_queue_start_pdsp(kdev, pdsp);
1661 if (!ret)
1662 pdsp->started = true;
1663 }
1664 }
1665 return 0;
1666 }
1667
1668 static inline struct knav_qmgr_info *knav_find_qmgr(unsigned id)
1669 {
1670 struct knav_qmgr_info *qmgr;
1671
1672 for_each_qmgr(kdev, qmgr) {
1673 if ((id >= qmgr->start_queue) &&
1674 (id < qmgr->start_queue + qmgr->num_queues))
1675 return qmgr;
1676 }
1677 return NULL;
1678 }
1679
1680 static int knav_queue_init_queue(struct knav_device *kdev,
1681 struct knav_range_info *range,
1682 struct knav_queue_inst *inst,
1683 unsigned id)
1684 {
1685 char irq_name[KNAV_NAME_SIZE];
1686 inst->qmgr = knav_find_qmgr(id);
1687 if (!inst->qmgr)
1688 return -1;
1689
1690 INIT_LIST_HEAD(&inst->handles);
1691 inst->kdev = kdev;
1692 inst->range = range;
1693 inst->irq_num = -1;
1694 inst->id = id;
1695 scnprintf(irq_name, sizeof(irq_name), "hwqueue-%d", id);
1696 inst->irq_name = kstrndup(irq_name, sizeof(irq_name), GFP_KERNEL);
1697
1698 if (range->ops && range->ops->init_queue)
1699 return range->ops->init_queue(range, inst);
1700 else
1701 return 0;
1702 }
1703
1704 static int knav_queue_init_queues(struct knav_device *kdev)
1705 {
1706 struct knav_range_info *range;
1707 int size, id, base_idx;
1708 int idx = 0, ret = 0;
1709
1710 /* how much do we need for instance data? */
1711 size = sizeof(struct knav_queue_inst);
1712
1713 /* round this up to a power of 2, keep the index to instance
1714 * arithmetic fast.
1715 * */
1716 kdev->inst_shift = order_base_2(size);
1717 size = (1 << kdev->inst_shift) * kdev->num_queues_in_use;
1718 kdev->instances = devm_kzalloc(kdev->dev, size, GFP_KERNEL);
1719 if (!kdev->instances)
1720 return -ENOMEM;
1721
1722 for_each_queue_range(kdev, range) {
1723 if (range->ops && range->ops->init_range)
1724 range->ops->init_range(range);
1725 base_idx = idx;
1726 for (id = range->queue_base;
1727 id < range->queue_base + range->num_queues; id++, idx++) {
1728 ret = knav_queue_init_queue(kdev, range,
1729 knav_queue_idx_to_inst(kdev, idx), id);
1730 if (ret < 0)
1731 return ret;
1732 }
1733 range->queue_base_inst =
1734 knav_queue_idx_to_inst(kdev, base_idx);
1735 }
1736 return 0;
1737 }
1738
1739 /* Match table for of_platform binding */
1740 static const struct of_device_id keystone_qmss_of_match[] = {
1741 {
1742 .compatible = "ti,keystone-navigator-qmss",
1743 },
1744 {
1745 .compatible = "ti,66ak2g-navss-qm",
1746 .data = (void *)QMSS_66AK2G,
1747 },
1748 {},
1749 };
1750 MODULE_DEVICE_TABLE(of, keystone_qmss_of_match);
1751
1752 static int knav_queue_probe(struct platform_device *pdev)
1753 {
1754 struct device_node *node = pdev->dev.of_node;
1755 struct device_node *qmgrs, *queue_pools, *regions, *pdsps;
1756 const struct of_device_id *match;
1757 struct device *dev = &pdev->dev;
1758 u32 temp[2];
1759 int ret;
1760
1761 if (!node) {
1762 dev_err(dev, "device tree info unavailable\n");
1763 return -ENODEV;
1764 }
1765
1766 kdev = devm_kzalloc(dev, sizeof(struct knav_device), GFP_KERNEL);
1767 if (!kdev) {
1768 dev_err(dev, "memory allocation failed\n");
1769 return -ENOMEM;
1770 }
1771
1772 match = of_match_device(of_match_ptr(keystone_qmss_of_match), dev);
1773 if (match && match->data)
1774 kdev->version = QMSS_66AK2G;
1775
1776 platform_set_drvdata(pdev, kdev);
1777 kdev->dev = dev;
1778 INIT_LIST_HEAD(&kdev->queue_ranges);
1779 INIT_LIST_HEAD(&kdev->qmgrs);
1780 INIT_LIST_HEAD(&kdev->pools);
1781 INIT_LIST_HEAD(&kdev->regions);
1782 INIT_LIST_HEAD(&kdev->pdsps);
1783
1784 pm_runtime_enable(&pdev->dev);
1785 ret = pm_runtime_get_sync(&pdev->dev);
1786 if (ret < 0) {
1787 pm_runtime_put_noidle(&pdev->dev);
1788 dev_err(dev, "Failed to enable QMSS\n");
1789 return ret;
1790 }
1791
1792 if (of_property_read_u32_array(node, "queue-range", temp, 2)) {
1793 dev_err(dev, "queue-range not specified\n");
1794 ret = -ENODEV;
1795 goto err;
1796 }
1797 kdev->base_id = temp[0];
1798 kdev->num_queues = temp[1];
1799
1800 /* Initialize queue managers using device tree configuration */
1801 qmgrs = of_get_child_by_name(node, "qmgrs");
1802 if (!qmgrs) {
1803 dev_err(dev, "queue manager info not specified\n");
1804 ret = -ENODEV;
1805 goto err;
1806 }
1807 ret = knav_queue_init_qmgrs(kdev, qmgrs);
1808 of_node_put(qmgrs);
1809 if (ret)
1810 goto err;
1811
1812 /* get pdsp configuration values from device tree */
1813 pdsps = of_get_child_by_name(node, "pdsps");
1814 if (pdsps) {
1815 ret = knav_queue_init_pdsps(kdev, pdsps);
1816 if (ret)
1817 goto err;
1818
1819 ret = knav_queue_start_pdsps(kdev);
1820 if (ret)
1821 goto err;
1822 }
1823 of_node_put(pdsps);
1824
1825 /* get usable queue range values from device tree */
1826 queue_pools = of_get_child_by_name(node, "queue-pools");
1827 if (!queue_pools) {
1828 dev_err(dev, "queue-pools not specified\n");
1829 ret = -ENODEV;
1830 goto err;
1831 }
1832 ret = knav_setup_queue_pools(kdev, queue_pools);
1833 of_node_put(queue_pools);
1834 if (ret)
1835 goto err;
1836
1837 ret = knav_get_link_ram(kdev, "linkram0", &kdev->link_rams[0]);
1838 if (ret) {
1839 dev_err(kdev->dev, "could not setup linking ram\n");
1840 goto err;
1841 }
1842
1843 ret = knav_get_link_ram(kdev, "linkram1", &kdev->link_rams[1]);
1844 if (ret) {
1845 /*
1846 * nothing really, we have one linking ram already, so we just
1847 * live within our means
1848 */
1849 }
1850
1851 ret = knav_queue_setup_link_ram(kdev);
1852 if (ret)
1853 goto err;
1854
1855 regions = of_get_child_by_name(node, "descriptor-regions");
1856 if (!regions) {
1857 dev_err(dev, "descriptor-regions not specified\n");
1858 ret = -ENODEV;
1859 goto err;
1860 }
1861 ret = knav_queue_setup_regions(kdev, regions);
1862 of_node_put(regions);
1863 if (ret)
1864 goto err;
1865
1866 ret = knav_queue_init_queues(kdev);
1867 if (ret < 0) {
1868 dev_err(dev, "hwqueue initialization failed\n");
1869 goto err;
1870 }
1871
1872 debugfs_create_file("qmss", S_IFREG | S_IRUGO, NULL, NULL,
1873 &knav_queue_debug_fops);
1874 device_ready = true;
1875 return 0;
1876
1877 err:
1878 knav_queue_stop_pdsps(kdev);
1879 knav_queue_free_regions(kdev);
1880 knav_free_queue_ranges(kdev);
1881 pm_runtime_put_sync(&pdev->dev);
1882 pm_runtime_disable(&pdev->dev);
1883 return ret;
1884 }
1885
1886 static int knav_queue_remove(struct platform_device *pdev)
1887 {
1888 /* TODO: Free resources */
1889 pm_runtime_put_sync(&pdev->dev);
1890 pm_runtime_disable(&pdev->dev);
1891 return 0;
1892 }
1893
1894 static struct platform_driver keystone_qmss_driver = {
1895 .probe = knav_queue_probe,
1896 .remove = knav_queue_remove,
1897 .driver = {
1898 .name = "keystone-navigator-qmss",
1899 .of_match_table = keystone_qmss_of_match,
1900 },
1901 };
1902 module_platform_driver(keystone_qmss_driver);
1903
1904 MODULE_LICENSE("GPL v2");
1905 MODULE_DESCRIPTION("TI QMSS driver for Keystone SOCs");
1906 MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com>");
1907 MODULE_AUTHOR("Santosh Shilimkar <santosh.shilimkar@ti.com>");
Linux with added FPC-III support