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 */
19 #include <linux/debugfs.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/firmware.h>
22 #include <linux/interrupt.h>
23 #include <linux/io.h>
24 #include <linux/module.h>
25 #include <linux/of_address.h>
26 #include <linux/of_device.h>
27 #include <linux/of_irq.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/slab.h>
30 #include <linux/soc/ti/knav_qmss.h>
32 #include "knav_qmss.h"
34 static struct knav_device *kdev;
35 static DEFINE_MUTEX(knav_dev_lock);
37 /* Queue manager register indices in DTS */
38 #define KNAV_QUEUE_PEEK_REG_INDEX 0
39 #define KNAV_QUEUE_STATUS_REG_INDEX 1
40 #define KNAV_QUEUE_CONFIG_REG_INDEX 2
41 #define KNAV_QUEUE_REGION_REG_INDEX 3
42 #define KNAV_QUEUE_PUSH_REG_INDEX 4
43 #define KNAV_QUEUE_POP_REG_INDEX 5
45 /* Queue manager register indices in DTS for QMSS in K2G NAVSS.
46 * There are no status and vbusm push registers on this version
47 * of QMSS. Push registers are same as pop, So all indices above 1
48 * are to be re-defined
49 */
50 #define KNAV_L_QUEUE_CONFIG_REG_INDEX 1
51 #define KNAV_L_QUEUE_REGION_REG_INDEX 2
52 #define KNAV_L_QUEUE_PUSH_REG_INDEX 3
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
60 #define knav_queue_idx_to_inst(kdev, idx) \
61 (kdev->instances + (idx << kdev->inst_shift))
63 #define for_each_handle_rcu(qh, inst) \
64 list_for_each_entry_rcu(qh, &inst->handles, list)
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))
71 /* All firmware file names end up here. List the firmware file names below.
72 * Newest followed by older ones. Search is done from start of the array
73 * until a firmware file is found.
74 */
75 const char *knav_acc_firmwares[] = {"ks2_qmss_pdsp_acc48.bin"};
77 static bool device_ready;
78 bool knav_qmss_device_ready(void)
79 {
80 return device_ready;
81 }
82 EXPORT_SYMBOL_GPL(knav_qmss_device_ready);
84 /**
85 * knav_queue_notify: qmss queue notfier call
86 *
87 * @inst: qmss queue instance like accumulator
88 */
89 void knav_queue_notify(struct knav_queue_inst *inst)
90 {
91 struct knav_queue *qh;
93 if (!inst)
94 return;
96 rcu_read_lock();
97 for_each_handle_rcu(qh, inst) {
98 if (atomic_read(&qh->notifier_enabled) <= 0)
99 continue;
100 if (WARN_ON(!qh->notifier_fn))
101 continue;
102 this_cpu_inc(qh->stats->notifies);
103 qh->notifier_fn(qh->notifier_fn_arg);
104 }
105 rcu_read_unlock();
106 }
107 EXPORT_SYMBOL_GPL(knav_queue_notify);
109 static irqreturn_t knav_queue_int_handler(int irq, void *_instdata)
110 {
111 struct knav_queue_inst *inst = _instdata;
113 knav_queue_notify(inst);
114 return IRQ_HANDLED;
115 }
117 static int knav_queue_setup_irq(struct knav_range_info *range,
118 struct knav_queue_inst *inst)
119 {
120 unsigned queue = inst->id - range->queue_base;
121 unsigned long cpu_map;
122 int ret = 0, irq;
124 if (range->flags & RANGE_HAS_IRQ) {
125 irq = range->irqs[queue].irq;
126 cpu_map = range->irqs[queue].cpu_map;
127 ret = request_irq(irq, knav_queue_int_handler, 0,
128 inst->irq_name, inst);
129 if (ret)
130 return ret;
131 disable_irq(irq);
132 if (cpu_map) {
133 ret = irq_set_affinity_hint(irq, to_cpumask(&cpu_map));
134 if (ret) {
135 dev_warn(range->kdev->dev,
136 "Failed to set IRQ affinity\n");
137 return ret;
138 }
139 }
140 }
141 return ret;
142 }
144 static void knav_queue_free_irq(struct knav_queue_inst *inst)
145 {
146 struct knav_range_info *range = inst->range;
147 unsigned queue = inst->id - inst->range->queue_base;
148 int irq;
150 if (range->flags & RANGE_HAS_IRQ) {
151 irq = range->irqs[queue].irq;
152 irq_set_affinity_hint(irq, NULL);
153 free_irq(irq, inst);
154 }
155 }
157 static inline bool knav_queue_is_busy(struct knav_queue_inst *inst)
158 {
159 return !list_empty(&inst->handles);
160 }
162 static inline bool knav_queue_is_reserved(struct knav_queue_inst *inst)
163 {
164 return inst->range->flags & RANGE_RESERVED;
165 }
167 static inline bool knav_queue_is_shared(struct knav_queue_inst *inst)
168 {
169 struct knav_queue *tmp;
171 rcu_read_lock();
172 for_each_handle_rcu(tmp, inst) {
173 if (tmp->flags & KNAV_QUEUE_SHARED) {
174 rcu_read_unlock();
175 return true;
176 }
177 }
178 rcu_read_unlock();
179 return false;
180 }
182 static inline bool knav_queue_match_type(struct knav_queue_inst *inst,
183 unsigned type)
184 {
185 if ((type == KNAV_QUEUE_QPEND) &&
186 (inst->range->flags & RANGE_HAS_IRQ)) {
187 return true;
188 } else if ((type == KNAV_QUEUE_ACC) &&
189 (inst->range->flags & RANGE_HAS_ACCUMULATOR)) {
190 return true;
191 } else if ((type == KNAV_QUEUE_GP) &&
192 !(inst->range->flags &
193 (RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ))) {
194 return true;
195 }
196 return false;
197 }
199 static inline struct knav_queue_inst *
200 knav_queue_match_id_to_inst(struct knav_device *kdev, unsigned id)
201 {
202 struct knav_queue_inst *inst;
203 int idx;
205 for_each_instance(idx, inst, kdev) {
206 if (inst->id == id)
207 return inst;
208 }
209 return NULL;
210 }
212 static inline struct knav_queue_inst *knav_queue_find_by_id(int id)
213 {
214 if (kdev->base_id <= id &&
215 kdev->base_id + kdev->num_queues > id) {
216 id -= kdev->base_id;
217 return knav_queue_match_id_to_inst(kdev, id);
218 }
219 return NULL;
220 }
222 static struct knav_queue *__knav_queue_open(struct knav_queue_inst *inst,
223 const char *name, unsigned flags)
224 {
225 struct knav_queue *qh;
226 unsigned id;
227 int ret = 0;
229 qh = devm_kzalloc(inst->kdev->dev, sizeof(*qh), GFP_KERNEL);
230 if (!qh)
231 return ERR_PTR(-ENOMEM);
233 qh->stats = alloc_percpu(struct knav_queue_stats);
234 if (!qh->stats) {
235 ret = -ENOMEM;
236 goto err;
237 }
239 qh->flags = flags;
240 qh->inst = inst;
241 id = inst->id - inst->qmgr->start_queue;
242 qh->reg_push = &inst->qmgr->reg_push[id];
243 qh->reg_pop = &inst->qmgr->reg_pop[id];
244 qh->reg_peek = &inst->qmgr->reg_peek[id];
246 /* first opener? */
247 if (!knav_queue_is_busy(inst)) {
248 struct knav_range_info *range = inst->range;
250 inst->name = kstrndup(name, KNAV_NAME_SIZE - 1, GFP_KERNEL);
251 if (range->ops && range->ops->open_queue)
252 ret = range->ops->open_queue(range, inst, flags);
254 if (ret)
255 goto err;
256 }
257 list_add_tail_rcu(&qh->list, &inst->handles);
258 return qh;
260 err:
261 if (qh->stats)
262 free_percpu(qh->stats);
263 devm_kfree(inst->kdev->dev, qh);
264 return ERR_PTR(ret);
265 }
267 static struct knav_queue *
268 knav_queue_open_by_id(const char *name, unsigned id, unsigned flags)
269 {
270 struct knav_queue_inst *inst;
271 struct knav_queue *qh;
273 mutex_lock(&knav_dev_lock);
275 qh = ERR_PTR(-ENODEV);
276 inst = knav_queue_find_by_id(id);
277 if (!inst)
278 goto unlock_ret;
280 qh = ERR_PTR(-EEXIST);
281 if (!(flags & KNAV_QUEUE_SHARED) && knav_queue_is_busy(inst))
282 goto unlock_ret;
284 qh = ERR_PTR(-EBUSY);
285 if ((flags & KNAV_QUEUE_SHARED) &&
286 (knav_queue_is_busy(inst) && !knav_queue_is_shared(inst)))
287 goto unlock_ret;
289 qh = __knav_queue_open(inst, name, flags);
291 unlock_ret:
292 mutex_unlock(&knav_dev_lock);
294 return qh;
295 }
297 static struct knav_queue *knav_queue_open_by_type(const char *name,
298 unsigned type, unsigned flags)
299 {
300 struct knav_queue_inst *inst;
301 struct knav_queue *qh = ERR_PTR(-EINVAL);
302 int idx;
304 mutex_lock(&knav_dev_lock);
306 for_each_instance(idx, inst, kdev) {
307 if (knav_queue_is_reserved(inst))
308 continue;
309 if (!knav_queue_match_type(inst, type))
310 continue;
311 if (knav_queue_is_busy(inst))
312 continue;
313 qh = __knav_queue_open(inst, name, flags);
314 goto unlock_ret;
315 }
317 unlock_ret:
318 mutex_unlock(&knav_dev_lock);
319 return qh;
320 }
322 static void knav_queue_set_notify(struct knav_queue_inst *inst, bool enabled)
323 {
324 struct knav_range_info *range = inst->range;
326 if (range->ops && range->ops->set_notify)
327 range->ops->set_notify(range, inst, enabled);
328 }
330 static int knav_queue_enable_notifier(struct knav_queue *qh)
331 {
332 struct knav_queue_inst *inst = qh->inst;
333 bool first;
335 if (WARN_ON(!qh->notifier_fn))
336 return -EINVAL;
338 /* Adjust the per handle notifier count */
339 first = (atomic_inc_return(&qh->notifier_enabled) == 1);
340 if (!first)
341 return 0; /* nothing to do */
343 /* Now adjust the per instance notifier count */
344 first = (atomic_inc_return(&inst->num_notifiers) == 1);
345 if (first)
346 knav_queue_set_notify(inst, true);
348 return 0;
349 }
351 static int knav_queue_disable_notifier(struct knav_queue *qh)
352 {
353 struct knav_queue_inst *inst = qh->inst;
354 bool last;
356 last = (atomic_dec_return(&qh->notifier_enabled) == 0);
357 if (!last)
358 return 0; /* nothing to do */
360 last = (atomic_dec_return(&inst->num_notifiers) == 0);
361 if (last)
362 knav_queue_set_notify(inst, false);
364 return 0;
365 }
367 static int knav_queue_set_notifier(struct knav_queue *qh,
368 struct knav_queue_notify_config *cfg)
369 {
370 knav_queue_notify_fn old_fn = qh->notifier_fn;
372 if (!cfg)
373 return -EINVAL;
375 if (!(qh->inst->range->flags & (RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ)))
376 return -ENOTSUPP;
378 if (!cfg->fn && old_fn)
379 knav_queue_disable_notifier(qh);
381 qh->notifier_fn = cfg->fn;
382 qh->notifier_fn_arg = cfg->fn_arg;
384 if (cfg->fn && !old_fn)
385 knav_queue_enable_notifier(qh);
387 return 0;
388 }
390 static int knav_gp_set_notify(struct knav_range_info *range,
391 struct knav_queue_inst *inst,
392 bool enabled)
393 {
394 unsigned queue;
396 if (range->flags & RANGE_HAS_IRQ) {
397 queue = inst->id - range->queue_base;
398 if (enabled)
399 enable_irq(range->irqs[queue].irq);
400 else
401 disable_irq_nosync(range->irqs[queue].irq);
402 }
403 return 0;
404 }
406 static int knav_gp_open_queue(struct knav_range_info *range,
407 struct knav_queue_inst *inst, unsigned flags)
408 {
409 return knav_queue_setup_irq(range, inst);
410 }
412 static int knav_gp_close_queue(struct knav_range_info *range,
413 struct knav_queue_inst *inst)
414 {
415 knav_queue_free_irq(inst);
416 return 0;
417 }
419 struct knav_range_ops knav_gp_range_ops = {
420 .set_notify = knav_gp_set_notify,
421 .open_queue = knav_gp_open_queue,
422 .close_queue = knav_gp_close_queue,
423 };
426 static int knav_queue_get_count(void *qhandle)
427 {
428 struct knav_queue *qh = qhandle;
429 struct knav_queue_inst *inst = qh->inst;
431 return readl_relaxed(&qh->reg_peek[0].entry_count) +
432 atomic_read(&inst->desc_count);
433 }
435 static void knav_queue_debug_show_instance(struct seq_file *s,
436 struct knav_queue_inst *inst)
437 {
438 struct knav_device *kdev = inst->kdev;
439 struct knav_queue *qh;
440 int cpu = 0;
441 int pushes = 0;
442 int pops = 0;
443 int push_errors = 0;
444 int pop_errors = 0;
445 int notifies = 0;
447 if (!knav_queue_is_busy(inst))
448 return;
450 seq_printf(s, "\tqueue id %d (%s)\n",
451 kdev->base_id + inst->id, inst->name);
452 for_each_handle_rcu(qh, inst) {
453 for_each_possible_cpu(cpu) {
454 pushes += per_cpu_ptr(qh->stats, cpu)->pushes;
455 pops += per_cpu_ptr(qh->stats, cpu)->pops;
456 push_errors += per_cpu_ptr(qh->stats, cpu)->push_errors;
457 pop_errors += per_cpu_ptr(qh->stats, cpu)->pop_errors;
458 notifies += per_cpu_ptr(qh->stats, cpu)->notifies;
459 }
461 seq_printf(s, "\t\thandle %p: pushes %8d, pops %8d, count %8d, notifies %8d, push errors %8d, pop errors %8d\n",
462 qh,
463 pushes,
464 pops,
465 knav_queue_get_count(qh),
466 notifies,
467 push_errors,
468 pop_errors);
469 }
470 }
472 static int knav_queue_debug_show(struct seq_file *s, void *v)
473 {
474 struct knav_queue_inst *inst;
475 int idx;
477 mutex_lock(&knav_dev_lock);
478 seq_printf(s, "%s: %u-%u\n",
479 dev_name(kdev->dev), kdev->base_id,
480 kdev->base_id + kdev->num_queues - 1);
481 for_each_instance(idx, inst, kdev)
482 knav_queue_debug_show_instance(s, inst);
483 mutex_unlock(&knav_dev_lock);
485 return 0;
486 }
488 static int knav_queue_debug_open(struct inode *inode, struct file *file)
489 {
490 return single_open(file, knav_queue_debug_show, NULL);
491 }
493 static const struct file_operations knav_queue_debug_ops = {
494 .open = knav_queue_debug_open,
495 .read = seq_read,
496 .llseek = seq_lseek,
497 .release = single_release,
498 };
500 static inline int knav_queue_pdsp_wait(u32 * __iomem addr, unsigned timeout,
501 u32 flags)
502 {
503 unsigned long end;
504 u32 val = 0;
506 end = jiffies + msecs_to_jiffies(timeout);
507 while (time_after(end, jiffies)) {
508 val = readl_relaxed(addr);
509 if (flags)
510 val &= flags;
511 if (!val)
512 break;
513 cpu_relax();
514 }
515 return val ? -ETIMEDOUT : 0;
516 }
519 static int knav_queue_flush(struct knav_queue *qh)
520 {
521 struct knav_queue_inst *inst = qh->inst;
522 unsigned id = inst->id - inst->qmgr->start_queue;
524 atomic_set(&inst->desc_count, 0);
525 writel_relaxed(0, &inst->qmgr->reg_push[id].ptr_size_thresh);
526 return 0;
527 }
529 /**
530 * knav_queue_open() - open a hardware queue
531 * @name - name to give the queue handle
532 * @id - desired queue number if any or specifes the type
533 * of queue
534 * @flags - the following flags are applicable to queues:
535 * KNAV_QUEUE_SHARED - allow the queue to be shared. Queues are
536 * exclusive by default.
537 * Subsequent attempts to open a shared queue should
538 * also have this flag.
539 *
540 * Returns a handle to the open hardware queue if successful. Use IS_ERR()
541 * to check the returned value for error codes.
542 */
543 void *knav_queue_open(const char *name, unsigned id,
544 unsigned flags)
545 {
546 struct knav_queue *qh = ERR_PTR(-EINVAL);
548 switch (id) {
549 case KNAV_QUEUE_QPEND:
550 case KNAV_QUEUE_ACC:
551 case KNAV_QUEUE_GP:
552 qh = knav_queue_open_by_type(name, id, flags);
553 break;
555 default:
556 qh = knav_queue_open_by_id(name, id, flags);
557 break;
558 }
559 return qh;
560 }
561 EXPORT_SYMBOL_GPL(knav_queue_open);
563 /**
564 * knav_queue_close() - close a hardware queue handle
565 * @qh - handle to close
566 */
567 void knav_queue_close(void *qhandle)
568 {
569 struct knav_queue *qh = qhandle;
570 struct knav_queue_inst *inst = qh->inst;
572 while (atomic_read(&qh->notifier_enabled) > 0)
573 knav_queue_disable_notifier(qh);
575 mutex_lock(&knav_dev_lock);
576 list_del_rcu(&qh->list);
577 mutex_unlock(&knav_dev_lock);
578 synchronize_rcu();
579 if (!knav_queue_is_busy(inst)) {
580 struct knav_range_info *range = inst->range;
582 if (range->ops && range->ops->close_queue)
583 range->ops->close_queue(range, inst);
584 }
585 free_percpu(qh->stats);
586 devm_kfree(inst->kdev->dev, qh);
587 }
588 EXPORT_SYMBOL_GPL(knav_queue_close);
590 /**
591 * knav_queue_device_control() - Perform control operations on a queue
592 * @qh - queue handle
593 * @cmd - control commands
594 * @arg - command argument
595 *
596 * Returns 0 on success, errno otherwise.
597 */
598 int knav_queue_device_control(void *qhandle, enum knav_queue_ctrl_cmd cmd,
599 unsigned long arg)
600 {
601 struct knav_queue *qh = qhandle;
602 struct knav_queue_notify_config *cfg;
603 int ret;
605 switch ((int)cmd) {
606 case KNAV_QUEUE_GET_ID:
607 ret = qh->inst->kdev->base_id + qh->inst->id;
608 break;
610 case KNAV_QUEUE_FLUSH:
611 ret = knav_queue_flush(qh);
612 break;
614 case KNAV_QUEUE_SET_NOTIFIER:
615 cfg = (void *)arg;
616 ret = knav_queue_set_notifier(qh, cfg);
617 break;
619 case KNAV_QUEUE_ENABLE_NOTIFY:
620 ret = knav_queue_enable_notifier(qh);
621 break;
623 case KNAV_QUEUE_DISABLE_NOTIFY:
624 ret = knav_queue_disable_notifier(qh);
625 break;
627 case KNAV_QUEUE_GET_COUNT:
628 ret = knav_queue_get_count(qh);
629 break;
631 default:
632 ret = -ENOTSUPP;
633 break;
634 }
635 return ret;
636 }
637 EXPORT_SYMBOL_GPL(knav_queue_device_control);
641 /**
642 * knav_queue_push() - push data (or descriptor) to the tail of a queue
643 * @qh - hardware queue handle
644 * @data - data to push
645 * @size - size of data to push
646 * @flags - can be used to pass additional information
647 *
648 * Returns 0 on success, errno otherwise.
649 */
650 int knav_queue_push(void *qhandle, dma_addr_t dma,
651 unsigned size, unsigned flags)
652 {
653 struct knav_queue *qh = qhandle;
654 u32 val;
656 val = (u32)dma | ((size / 16) - 1);
657 writel_relaxed(val, &qh->reg_push[0].ptr_size_thresh);
659 this_cpu_inc(qh->stats->pushes);
660 return 0;
661 }
662 EXPORT_SYMBOL_GPL(knav_queue_push);
664 /**
665 * knav_queue_pop() - pop data (or descriptor) from the head of a queue
666 * @qh - hardware queue handle
667 * @size - (optional) size of the data pop'ed.
668 *
669 * Returns a DMA address on success, 0 on failure.
670 */
671 dma_addr_t knav_queue_pop(void *qhandle, unsigned *size)
672 {
673 struct knav_queue *qh = qhandle;
674 struct knav_queue_inst *inst = qh->inst;
675 dma_addr_t dma;
676 u32 val, idx;
678 /* are we accumulated? */
679 if (inst->descs) {
680 if (unlikely(atomic_dec_return(&inst->desc_count) < 0)) {
681 atomic_inc(&inst->desc_count);
682 return 0;
683 }
684 idx = atomic_inc_return(&inst->desc_head);
685 idx &= ACC_DESCS_MASK;
686 val = inst->descs[idx];
687 } else {
688 val = readl_relaxed(&qh->reg_pop[0].ptr_size_thresh);
689 if (unlikely(!val))
690 return 0;
691 }
693 dma = val & DESC_PTR_MASK;
694 if (size)
695 *size = ((val & DESC_SIZE_MASK) + 1) * 16;
697 this_cpu_inc(qh->stats->pops);
698 return dma;
699 }
700 EXPORT_SYMBOL_GPL(knav_queue_pop);
702 /* carve out descriptors and push into queue */
703 static void kdesc_fill_pool(struct knav_pool *pool)
704 {
705 struct knav_region *region;
706 int i;
708 region = pool->region;
709 pool->desc_size = region->desc_size;
710 for (i = 0; i < pool->num_desc; i++) {
711 int index = pool->region_offset + i;
712 dma_addr_t dma_addr;
713 unsigned dma_size;
714 dma_addr = region->dma_start + (region->desc_size * index);
715 dma_size = ALIGN(pool->desc_size, SMP_CACHE_BYTES);
716 dma_sync_single_for_device(pool->dev, dma_addr, dma_size,
717 DMA_TO_DEVICE);
718 knav_queue_push(pool->queue, dma_addr, dma_size, 0);
719 }
720 }
722 /* pop out descriptors and close the queue */
723 static void kdesc_empty_pool(struct knav_pool *pool)
724 {
725 dma_addr_t dma;
726 unsigned size;
727 void *desc;
728 int i;
730 if (!pool->queue)
731 return;
733 for (i = 0;; i++) {
734 dma = knav_queue_pop(pool->queue, &size);
735 if (!dma)
736 break;
737 desc = knav_pool_desc_dma_to_virt(pool, dma);
738 if (!desc) {
739 dev_dbg(pool->kdev->dev,
740 "couldn't unmap desc, continuing\n");
741 continue;
742 }
743 }
744 WARN_ON(i != pool->num_desc);
745 knav_queue_close(pool->queue);
746 }
749 /* Get the DMA address of a descriptor */
750 dma_addr_t knav_pool_desc_virt_to_dma(void *ph, void *virt)
751 {
752 struct knav_pool *pool = ph;
753 return pool->region->dma_start + (virt - pool->region->virt_start);
754 }
755 EXPORT_SYMBOL_GPL(knav_pool_desc_virt_to_dma);
757 void *knav_pool_desc_dma_to_virt(void *ph, dma_addr_t dma)
758 {
759 struct knav_pool *pool = ph;
760 return pool->region->virt_start + (dma - pool->region->dma_start);
761 }
762 EXPORT_SYMBOL_GPL(knav_pool_desc_dma_to_virt);
764 /**
765 * knav_pool_create() - Create a pool of descriptors
766 * @name - name to give the pool handle
767 * @num_desc - numbers of descriptors in the pool
768 * @region_id - QMSS region id from which the descriptors are to be
769 * allocated.
770 *
771 * Returns a pool handle on success.
772 * Use IS_ERR_OR_NULL() to identify error values on return.
773 */
774 void *knav_pool_create(const char *name,
775 int num_desc, int region_id)
776 {
777 struct knav_region *reg_itr, *region = NULL;
778 struct knav_pool *pool, *pi;
779 struct list_head *node;
780 unsigned last_offset;
781 bool slot_found;
782 int ret;
784 if (!kdev)
785 return ERR_PTR(-EPROBE_DEFER);
787 if (!kdev->dev)
788 return ERR_PTR(-ENODEV);
790 pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL);
791 if (!pool) {
792 dev_err(kdev->dev, "out of memory allocating pool\n");
793 return ERR_PTR(-ENOMEM);
794 }
796 for_each_region(kdev, reg_itr) {
797 if (reg_itr->id != region_id)
798 continue;
799 region = reg_itr;
800 break;
801 }
803 if (!region) {
804 dev_err(kdev->dev, "region-id(%d) not found\n", region_id);
805 ret = -EINVAL;
806 goto err;
807 }
809 pool->queue = knav_queue_open(name, KNAV_QUEUE_GP, 0);
810 if (IS_ERR_OR_NULL(pool->queue)) {
811 dev_err(kdev->dev,
812 "failed to open queue for pool(%s), error %ld\n",
813 name, PTR_ERR(pool->queue));
814 ret = PTR_ERR(pool->queue);
815 goto err;
816 }
818 pool->name = kstrndup(name, KNAV_NAME_SIZE - 1, GFP_KERNEL);
819 pool->kdev = kdev;
820 pool->dev = kdev->dev;
822 mutex_lock(&knav_dev_lock);
824 if (num_desc > (region->num_desc - region->used_desc)) {
825 dev_err(kdev->dev, "out of descs in region(%d) for pool(%s)\n",
826 region_id, name);
827 ret = -ENOMEM;
828 goto err_unlock;
829 }
831 /* Region maintains a sorted (by region offset) list of pools
832 * use the first free slot which is large enough to accomodate
833 * the request
834 */
835 last_offset = 0;
836 slot_found = false;
837 node = ®ion->pools;
838 list_for_each_entry(pi, ®ion->pools, region_inst) {
839 if ((pi->region_offset - last_offset) >= num_desc) {
840 slot_found = true;
841 break;
842 }
843 last_offset = pi->region_offset + pi->num_desc;
844 }
845 node = &pi->region_inst;
847 if (slot_found) {
848 pool->region = region;
849 pool->num_desc = num_desc;
850 pool->region_offset = last_offset;
851 region->used_desc += num_desc;
852 list_add_tail(&pool->list, &kdev->pools);
853 list_add_tail(&pool->region_inst, node);
854 } else {
855 dev_err(kdev->dev, "pool(%s) create failed: fragmented desc pool in region(%d)\n",
856 name, region_id);
857 ret = -ENOMEM;
858 goto err_unlock;
859 }
861 mutex_unlock(&knav_dev_lock);
862 kdesc_fill_pool(pool);
863 return pool;
865 err_unlock:
866 mutex_unlock(&knav_dev_lock);
867 err:
868 kfree(pool->name);
869 devm_kfree(kdev->dev, pool);
870 return ERR_PTR(ret);
871 }
872 EXPORT_SYMBOL_GPL(knav_pool_create);
874 /**
875 * knav_pool_destroy() - Free a pool of descriptors
876 * @pool - pool handle
877 */
878 void knav_pool_destroy(void *ph)
879 {
880 struct knav_pool *pool = ph;
882 if (!pool)
883 return;
885 if (!pool->region)
886 return;
888 kdesc_empty_pool(pool);
889 mutex_lock(&knav_dev_lock);
891 pool->region->used_desc -= pool->num_desc;
892 list_del(&pool->region_inst);
893 list_del(&pool->list);
895 mutex_unlock(&knav_dev_lock);
896 kfree(pool->name);
897 devm_kfree(kdev->dev, pool);
898 }
899 EXPORT_SYMBOL_GPL(knav_pool_destroy);
902 /**
903 * knav_pool_desc_get() - Get a descriptor from the pool
904 * @pool - pool handle
905 *
906 * Returns descriptor from the pool.
907 */
908 void *knav_pool_desc_get(void *ph)
909 {
910 struct knav_pool *pool = ph;
911 dma_addr_t dma;
912 unsigned size;
913 void *data;
915 dma = knav_queue_pop(pool->queue, &size);
916 if (unlikely(!dma))
917 return ERR_PTR(-ENOMEM);
918 data = knav_pool_desc_dma_to_virt(pool, dma);
919 return data;
920 }
921 EXPORT_SYMBOL_GPL(knav_pool_desc_get);
923 /**
924 * knav_pool_desc_put() - return a descriptor to the pool
925 * @pool - pool handle
926 */
927 void knav_pool_desc_put(void *ph, void *desc)
928 {
929 struct knav_pool *pool = ph;
930 dma_addr_t dma;
931 dma = knav_pool_desc_virt_to_dma(pool, desc);
932 knav_queue_push(pool->queue, dma, pool->region->desc_size, 0);
933 }
934 EXPORT_SYMBOL_GPL(knav_pool_desc_put);
936 /**
937 * knav_pool_desc_map() - Map descriptor for DMA transfer
938 * @pool - pool handle
939 * @desc - address of descriptor to map
940 * @size - size of descriptor to map
941 * @dma - DMA address return pointer
942 * @dma_sz - adjusted return pointer
943 *
944 * Returns 0 on success, errno otherwise.
945 */
946 int knav_pool_desc_map(void *ph, void *desc, unsigned size,
947 dma_addr_t *dma, unsigned *dma_sz)
948 {
949 struct knav_pool *pool = ph;
950 *dma = knav_pool_desc_virt_to_dma(pool, desc);
951 size = min(size, pool->region->desc_size);
952 size = ALIGN(size, SMP_CACHE_BYTES);
953 *dma_sz = size;
954 dma_sync_single_for_device(pool->dev, *dma, size, DMA_TO_DEVICE);
956 /* Ensure the descriptor reaches to the memory */
957 __iowmb();
959 return 0;
960 }
961 EXPORT_SYMBOL_GPL(knav_pool_desc_map);
963 /**
964 * knav_pool_desc_unmap() - Unmap descriptor after DMA transfer
965 * @pool - pool handle
966 * @dma - DMA address of descriptor to unmap
967 * @dma_sz - size of descriptor to unmap
968 *
969 * Returns descriptor address on success, Use IS_ERR_OR_NULL() to identify
970 * error values on return.
971 */
972 void *knav_pool_desc_unmap(void *ph, dma_addr_t dma, unsigned dma_sz)
973 {
974 struct knav_pool *pool = ph;
975 unsigned desc_sz;
976 void *desc;
978 desc_sz = min(dma_sz, pool->region->desc_size);
979 desc = knav_pool_desc_dma_to_virt(pool, dma);
980 dma_sync_single_for_cpu(pool->dev, dma, desc_sz, DMA_FROM_DEVICE);
981 prefetch(desc);
982 return desc;
983 }
984 EXPORT_SYMBOL_GPL(knav_pool_desc_unmap);
986 /**
987 * knav_pool_count() - Get the number of descriptors in pool.
988 * @pool - pool handle
989 * Returns number of elements in the pool.
990 */
991 int knav_pool_count(void *ph)
992 {
993 struct knav_pool *pool = ph;
994 return knav_queue_get_count(pool->queue);
995 }
996 EXPORT_SYMBOL_GPL(knav_pool_count);
998 static void knav_queue_setup_region(struct knav_device *kdev,
999 struct knav_region *region)
1000 {
1001 unsigned hw_num_desc, hw_desc_size, size;
1002 struct knav_reg_region __iomem *regs;
1003 struct knav_qmgr_info *qmgr;
1004 struct knav_pool *pool;
1005 int id = region->id;
1006 struct page *page;
1008 /* unused region? */
1009 if (!region->num_desc) {
1010 dev_warn(kdev->dev, "unused region %s\n", region->name);
1011 return;
1012 }
1014 /* get hardware descriptor value */
1015 hw_num_desc = ilog2(region->num_desc - 1) + 1;
1017 /* did we force fit ourselves into nothingness? */
1018 if (region->num_desc < 32) {
1019 region->num_desc = 0;
1020 dev_warn(kdev->dev, "too few descriptors in region %s\n",
1021 region->name);
1022 return;
1023 }
1025 size = region->num_desc * region->desc_size;
1026 region->virt_start = alloc_pages_exact(size, GFP_KERNEL | GFP_DMA |
1027 GFP_DMA32);
1028 if (!region->virt_start) {
1029 region->num_desc = 0;
1030 dev_err(kdev->dev, "memory alloc failed for region %s\n",
1031 region->name);
1032 return;
1033 }
1034 region->virt_end = region->virt_start + size;
1035 page = virt_to_page(region->virt_start);
1037 region->dma_start = dma_map_page(kdev->dev, page, 0, size,
1038 DMA_BIDIRECTIONAL);
1039 if (dma_mapping_error(kdev->dev, region->dma_start)) {
1040 dev_err(kdev->dev, "dma map failed for region %s\n",
1041 region->name);
1042 goto fail;
1043 }
1044 region->dma_end = region->dma_start + size;
1046 pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL);
1047 if (!pool) {
1048 dev_err(kdev->dev, "out of memory allocating dummy pool\n");
1049 goto fail;
1050 }
1051 pool->num_desc = 0;
1052 pool->region_offset = region->num_desc;
1053 list_add(&pool->region_inst, ®ion->pools);
1055 dev_dbg(kdev->dev,
1056 "region %s (%d): size:%d, link:%d@%d, dma:%pad-%pad, virt:%p-%p\n",
1057 region->name, id, region->desc_size, region->num_desc,
1058 region->link_index, ®ion->dma_start, ®ion->dma_end,
1059 region->virt_start, region->virt_end);
1061 hw_desc_size = (region->desc_size / 16) - 1;
1062 hw_num_desc -= 5;
1064 for_each_qmgr(kdev, qmgr) {
1065 regs = qmgr->reg_region + id;
1066 writel_relaxed((u32)region->dma_start, ®s->base);
1067 writel_relaxed(region->link_index, ®s->start_index);
1068 writel_relaxed(hw_desc_size << 16 | hw_num_desc,
1069 ®s->size_count);
1070 }
1071 return;
1073 fail:
1074 if (region->dma_start)
1075 dma_unmap_page(kdev->dev, region->dma_start, size,
1076 DMA_BIDIRECTIONAL);
1077 if (region->virt_start)
1078 free_pages_exact(region->virt_start, size);
1079 region->num_desc = 0;
1080 return;
1081 }
1083 static const char *knav_queue_find_name(struct device_node *node)
1084 {
1085 const char *name;
1087 if (of_property_read_string(node, "label", &name) < 0)
1088 name = node->name;
1089 if (!name)
1090 name = "unknown";
1091 return name;
1092 }
1094 static int knav_queue_setup_regions(struct knav_device *kdev,
1095 struct device_node *regions)
1096 {
1097 struct device *dev = kdev->dev;
1098 struct knav_region *region;
1099 struct device_node *child;
1100 u32 temp[2];
1101 int ret;
1103 for_each_child_of_node(regions, child) {
1104 region = devm_kzalloc(dev, sizeof(*region), GFP_KERNEL);
1105 if (!region) {
1106 dev_err(dev, "out of memory allocating region\n");
1107 return -ENOMEM;
1108 }
1110 region->name = knav_queue_find_name(child);
1111 of_property_read_u32(child, "id", ®ion->id);
1112 ret = of_property_read_u32_array(child, "region-spec", temp, 2);
1113 if (!ret) {
1114 region->num_desc = temp[0];
1115 region->desc_size = temp[1];
1116 } else {
1117 dev_err(dev, "invalid region info %s\n", region->name);
1118 devm_kfree(dev, region);
1119 continue;
1120 }
1122 if (!of_get_property(child, "link-index", NULL)) {
1123 dev_err(dev, "No link info for %s\n", region->name);
1124 devm_kfree(dev, region);
1125 continue;
1126 }
1127 ret = of_property_read_u32(child, "link-index",
1128 ®ion->link_index);
1129 if (ret) {
1130 dev_err(dev, "link index not found for %s\n",
1131 region->name);
1132 devm_kfree(dev, region);
1133 continue;
1134 }
1136 INIT_LIST_HEAD(®ion->pools);
1137 list_add_tail(®ion->list, &kdev->regions);
1138 }
1139 if (list_empty(&kdev->regions)) {
1140 dev_err(dev, "no valid region information found\n");
1141 return -ENODEV;
1142 }
1144 /* Next, we run through the regions and set things up */
1145 for_each_region(kdev, region)
1146 knav_queue_setup_region(kdev, region);
1148 return 0;
1149 }
1151 static int knav_get_link_ram(struct knav_device *kdev,
1152 const char *name,
1153 struct knav_link_ram_block *block)
1154 {
1155 struct platform_device *pdev = to_platform_device(kdev->dev);
1156 struct device_node *node = pdev->dev.of_node;
1157 u32 temp[2];
1159 /*
1160 * Note: link ram resources are specified in "entry" sized units. In
1161 * reality, although entries are ~40bits in hardware, we treat them as
1162 * 64-bit entities here.
1163 *
1164 * For example, to specify the internal link ram for Keystone-I class
1165 * devices, we would set the linkram0 resource to 0x80000-0x83fff.
1166 *
1167 * This gets a bit weird when other link rams are used. For example,
1168 * if the range specified is 0x0c000000-0x0c003fff (i.e., 16K entries
1169 * in MSMC SRAM), the actual memory used is 0x0c000000-0x0c020000,
1170 * which accounts for 64-bits per entry, for 16K entries.
1171 */
1172 if (!of_property_read_u32_array(node, name , temp, 2)) {
1173 if (temp[0]) {
1174 /*
1175 * queue_base specified => using internal or onchip
1176 * link ram WARNING - we do not "reserve" this block
1177 */
1178 block->dma = (dma_addr_t)temp[0];
1179 block->virt = NULL;
1180 block->size = temp[1];
1181 } else {
1182 block->size = temp[1];
1183 /* queue_base not specific => allocate requested size */
1184 block->virt = dmam_alloc_coherent(kdev->dev,
1185 8 * block->size, &block->dma,
1186 GFP_KERNEL);
1187 if (!block->virt) {
1188 dev_err(kdev->dev, "failed to alloc linkram\n");
1189 return -ENOMEM;
1190 }
1191 }
1192 } else {
1193 return -ENODEV;
1194 }
1195 return 0;
1196 }
1198 static int knav_queue_setup_link_ram(struct knav_device *kdev)
1199 {
1200 struct knav_link_ram_block *block;
1201 struct knav_qmgr_info *qmgr;
1203 for_each_qmgr(kdev, qmgr) {
1204 block = &kdev->link_rams[0];
1205 dev_dbg(kdev->dev, "linkram0: dma:%pad, virt:%p, size:%x\n",
1206 &block->dma, block->virt, block->size);
1207 writel_relaxed((u32)block->dma, &qmgr->reg_config->link_ram_base0);
1208 if (kdev->version == QMSS_66AK2G)
1209 writel_relaxed(block->size,
1210 &qmgr->reg_config->link_ram_size0);
1211 else
1212 writel_relaxed(block->size - 1,
1213 &qmgr->reg_config->link_ram_size0);
1214 block++;
1215 if (!block->size)
1216 continue;
1218 dev_dbg(kdev->dev, "linkram1: dma:%pad, virt:%p, size:%x\n",
1219 &block->dma, block->virt, block->size);
1220 writel_relaxed(block->dma, &qmgr->reg_config->link_ram_base1);
1221 }
1223 return 0;
1224 }
1226 static int knav_setup_queue_range(struct knav_device *kdev,
1227 struct device_node *node)
1228 {
1229 struct device *dev = kdev->dev;
1230 struct knav_range_info *range;
1231 struct knav_qmgr_info *qmgr;
1232 u32 temp[2], start, end, id, index;
1233 int ret, i;
1235 range = devm_kzalloc(dev, sizeof(*range), GFP_KERNEL);
1236 if (!range) {
1237 dev_err(dev, "out of memory allocating range\n");
1238 return -ENOMEM;
1239 }
1241 range->kdev = kdev;
1242 range->name = knav_queue_find_name(node);
1243 ret = of_property_read_u32_array(node, "qrange", temp, 2);
1244 if (!ret) {
1245 range->queue_base = temp[0] - kdev->base_id;
1246 range->num_queues = temp[1];
1247 } else {
1248 dev_err(dev, "invalid queue range %s\n", range->name);
1249 devm_kfree(dev, range);
1250 return -EINVAL;
1251 }
1253 for (i = 0; i < RANGE_MAX_IRQS; i++) {
1254 struct of_phandle_args oirq;
1256 if (of_irq_parse_one(node, i, &oirq))
1257 break;
1259 range->irqs[i].irq = irq_create_of_mapping(&oirq);
1260 if (range->irqs[i].irq == IRQ_NONE)
1261 break;
1263 range->num_irqs++;
1265 if (IS_ENABLED(CONFIG_SMP) && oirq.args_count == 3)
1266 range->irqs[i].cpu_map =
1267 (oirq.args[2] & 0x0000ff00) >> 8;
1268 }
1270 range->num_irqs = min(range->num_irqs, range->num_queues);
1271 if (range->num_irqs)
1272 range->flags |= RANGE_HAS_IRQ;
1274 if (of_get_property(node, "qalloc-by-id", NULL))
1275 range->flags |= RANGE_RESERVED;
1277 if (of_get_property(node, "accumulator", NULL)) {
1278 ret = knav_init_acc_range(kdev, node, range);
1279 if (ret < 0) {
1280 devm_kfree(dev, range);
1281 return ret;
1282 }
1283 } else {
1284 range->ops = &knav_gp_range_ops;
1285 }
1287 /* set threshold to 1, and flush out the queues */
1288 for_each_qmgr(kdev, qmgr) {
1289 start = max(qmgr->start_queue, range->queue_base);
1290 end = min(qmgr->start_queue + qmgr->num_queues,
1291 range->queue_base + range->num_queues);
1292 for (id = start; id < end; id++) {
1293 index = id - qmgr->start_queue;
1294 writel_relaxed(THRESH_GTE | 1,
1295 &qmgr->reg_peek[index].ptr_size_thresh);
1296 writel_relaxed(0,
1297 &qmgr->reg_push[index].ptr_size_thresh);
1298 }
1299 }
1301 list_add_tail(&range->list, &kdev->queue_ranges);
1302 dev_dbg(dev, "added range %s: %d-%d, %d irqs%s%s%s\n",
1303 range->name, range->queue_base,
1304 range->queue_base + range->num_queues - 1,
1305 range->num_irqs,
1306 (range->flags & RANGE_HAS_IRQ) ? ", has irq" : "",
1307 (range->flags & RANGE_RESERVED) ? ", reserved" : "",
1308 (range->flags & RANGE_HAS_ACCUMULATOR) ? ", acc" : "");
1309 kdev->num_queues_in_use += range->num_queues;
1310 return 0;
1311 }
1313 static int knav_setup_queue_pools(struct knav_device *kdev,
1314 struct device_node *queue_pools)
1315 {
1316 struct device_node *type, *range;
1317 int ret;
1319 for_each_child_of_node(queue_pools, type) {
1320 for_each_child_of_node(type, range) {
1321 ret = knav_setup_queue_range(kdev, range);
1322 /* return value ignored, we init the rest... */
1323 }
1324 }
1326 /* ... and barf if they all failed! */
1327 if (list_empty(&kdev->queue_ranges)) {
1328 dev_err(kdev->dev, "no valid queue range found\n");
1329 return -ENODEV;
1330 }
1331 return 0;
1332 }
1334 static void knav_free_queue_range(struct knav_device *kdev,
1335 struct knav_range_info *range)
1336 {
1337 if (range->ops && range->ops->free_range)
1338 range->ops->free_range(range);
1339 list_del(&range->list);
1340 devm_kfree(kdev->dev, range);
1341 }
1343 static void knav_free_queue_ranges(struct knav_device *kdev)
1344 {
1345 struct knav_range_info *range;
1347 for (;;) {
1348 range = first_queue_range(kdev);
1349 if (!range)
1350 break;
1351 knav_free_queue_range(kdev, range);
1352 }
1353 }
1355 static void knav_queue_free_regions(struct knav_device *kdev)
1356 {
1357 struct knav_region *region;
1358 struct knav_pool *pool, *tmp;
1359 unsigned size;
1361 for (;;) {
1362 region = first_region(kdev);
1363 if (!region)
1364 break;
1365 list_for_each_entry_safe(pool, tmp, ®ion->pools, region_inst)
1366 knav_pool_destroy(pool);
1368 size = region->virt_end - region->virt_start;
1369 if (size)
1370 free_pages_exact(region->virt_start, size);
1371 list_del(®ion->list);
1372 devm_kfree(kdev->dev, region);
1373 }
1374 }
1376 static void __iomem *knav_queue_map_reg(struct knav_device *kdev,
1377 struct device_node *node, int index)
1378 {
1379 struct resource res;
1380 void __iomem *regs;
1381 int ret;
1383 ret = of_address_to_resource(node, index, &res);
1384 if (ret) {
1385 dev_err(kdev->dev, "Can't translate of node(%s) address for index(%d)\n",
1386 node->name, index);
1387 return ERR_PTR(ret);
1388 }
1390 regs = devm_ioremap_resource(kdev->dev, &res);
1391 if (IS_ERR(regs))
1392 dev_err(kdev->dev, "Failed to map register base for index(%d) node(%s)\n",
1393 index, node->name);
1394 return regs;
1395 }
1397 static int knav_queue_init_qmgrs(struct knav_device *kdev,
1398 struct device_node *qmgrs)
1399 {
1400 struct device *dev = kdev->dev;
1401 struct knav_qmgr_info *qmgr;
1402 struct device_node *child;
1403 u32 temp[2];
1404 int ret;
1406 for_each_child_of_node(qmgrs, child) {
1407 qmgr = devm_kzalloc(dev, sizeof(*qmgr), GFP_KERNEL);
1408 if (!qmgr) {
1409 dev_err(dev, "out of memory allocating qmgr\n");
1410 return -ENOMEM;
1411 }
1413 ret = of_property_read_u32_array(child, "managed-queues",
1414 temp, 2);
1415 if (!ret) {
1416 qmgr->start_queue = temp[0];
1417 qmgr->num_queues = temp[1];
1418 } else {
1419 dev_err(dev, "invalid qmgr queue range\n");
1420 devm_kfree(dev, qmgr);
1421 continue;
1422 }
1424 dev_info(dev, "qmgr start queue %d, number of queues %d\n",
1425 qmgr->start_queue, qmgr->num_queues);
1427 qmgr->reg_peek =
1428 knav_queue_map_reg(kdev, child,
1429 KNAV_QUEUE_PEEK_REG_INDEX);
1431 if (kdev->version == QMSS) {
1432 qmgr->reg_status =
1433 knav_queue_map_reg(kdev, child,
1434 KNAV_QUEUE_STATUS_REG_INDEX);
1435 }
1437 qmgr->reg_config =
1438 knav_queue_map_reg(kdev, child,
1439 (kdev->version == QMSS_66AK2G) ?
1440 KNAV_L_QUEUE_CONFIG_REG_INDEX :
1441 KNAV_QUEUE_CONFIG_REG_INDEX);
1442 qmgr->reg_region =
1443 knav_queue_map_reg(kdev, child,
1444 (kdev->version == QMSS_66AK2G) ?
1445 KNAV_L_QUEUE_REGION_REG_INDEX :
1446 KNAV_QUEUE_REGION_REG_INDEX);
1448 qmgr->reg_push =
1449 knav_queue_map_reg(kdev, child,
1450 (kdev->version == QMSS_66AK2G) ?
1451 KNAV_L_QUEUE_PUSH_REG_INDEX :
1452 KNAV_QUEUE_PUSH_REG_INDEX);
1454 if (kdev->version == QMSS) {
1455 qmgr->reg_pop =
1456 knav_queue_map_reg(kdev, child,
1457 KNAV_QUEUE_POP_REG_INDEX);
1458 }
1460 if (IS_ERR(qmgr->reg_peek) ||
1461 ((kdev->version == QMSS) &&
1462 (IS_ERR(qmgr->reg_status) || IS_ERR(qmgr->reg_pop))) ||
1463 IS_ERR(qmgr->reg_config) || IS_ERR(qmgr->reg_region) ||
1464 IS_ERR(qmgr->reg_push)) {
1465 dev_err(dev, "failed to map qmgr regs\n");
1466 if (kdev->version == QMSS) {
1467 if (!IS_ERR(qmgr->reg_status))
1468 devm_iounmap(dev, qmgr->reg_status);
1469 if (!IS_ERR(qmgr->reg_pop))
1470 devm_iounmap(dev, qmgr->reg_pop);
1471 }
1472 if (!IS_ERR(qmgr->reg_peek))
1473 devm_iounmap(dev, qmgr->reg_peek);
1474 if (!IS_ERR(qmgr->reg_config))
1475 devm_iounmap(dev, qmgr->reg_config);
1476 if (!IS_ERR(qmgr->reg_region))
1477 devm_iounmap(dev, qmgr->reg_region);
1478 if (!IS_ERR(qmgr->reg_push))
1479 devm_iounmap(dev, qmgr->reg_push);
1480 devm_kfree(dev, qmgr);
1481 continue;
1482 }
1484 /* Use same push register for pop as well */
1485 if (kdev->version == QMSS_66AK2G)
1486 qmgr->reg_pop = qmgr->reg_push;
1488 list_add_tail(&qmgr->list, &kdev->qmgrs);
1489 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",
1490 qmgr->start_queue, qmgr->num_queues,
1491 qmgr->reg_peek, qmgr->reg_status,
1492 qmgr->reg_config, qmgr->reg_region,
1493 qmgr->reg_push, qmgr->reg_pop);
1494 }
1495 return 0;
1496 }
1498 static int knav_queue_init_pdsps(struct knav_device *kdev,
1499 struct device_node *pdsps)
1500 {
1501 struct device *dev = kdev->dev;
1502 struct knav_pdsp_info *pdsp;
1503 struct device_node *child;
1505 for_each_child_of_node(pdsps, child) {
1506 pdsp = devm_kzalloc(dev, sizeof(*pdsp), GFP_KERNEL);
1507 if (!pdsp) {
1508 dev_err(dev, "out of memory allocating pdsp\n");
1509 return -ENOMEM;
1510 }
1511 pdsp->name = knav_queue_find_name(child);
1512 pdsp->iram =
1513 knav_queue_map_reg(kdev, child,
1514 KNAV_QUEUE_PDSP_IRAM_REG_INDEX);
1515 pdsp->regs =
1516 knav_queue_map_reg(kdev, child,
1517 KNAV_QUEUE_PDSP_REGS_REG_INDEX);
1518 pdsp->intd =
1519 knav_queue_map_reg(kdev, child,
1520 KNAV_QUEUE_PDSP_INTD_REG_INDEX);
1521 pdsp->command =
1522 knav_queue_map_reg(kdev, child,
1523 KNAV_QUEUE_PDSP_CMD_REG_INDEX);
1525 if (IS_ERR(pdsp->command) || IS_ERR(pdsp->iram) ||
1526 IS_ERR(pdsp->regs) || IS_ERR(pdsp->intd)) {
1527 dev_err(dev, "failed to map pdsp %s regs\n",
1528 pdsp->name);
1529 if (!IS_ERR(pdsp->command))
1530 devm_iounmap(dev, pdsp->command);
1531 if (!IS_ERR(pdsp->iram))
1532 devm_iounmap(dev, pdsp->iram);
1533 if (!IS_ERR(pdsp->regs))
1534 devm_iounmap(dev, pdsp->regs);
1535 if (!IS_ERR(pdsp->intd))
1536 devm_iounmap(dev, pdsp->intd);
1537 devm_kfree(dev, pdsp);
1538 continue;
1539 }
1540 of_property_read_u32(child, "id", &pdsp->id);
1541 list_add_tail(&pdsp->list, &kdev->pdsps);
1542 dev_dbg(dev, "added pdsp %s: command %p, iram %p, regs %p, intd %p\n",
1543 pdsp->name, pdsp->command, pdsp->iram, pdsp->regs,
1544 pdsp->intd);
1545 }
1546 return 0;
1547 }
1549 static int knav_queue_stop_pdsp(struct knav_device *kdev,
1550 struct knav_pdsp_info *pdsp)
1551 {
1552 u32 val, timeout = 1000;
1553 int ret;
1555 val = readl_relaxed(&pdsp->regs->control) & ~PDSP_CTRL_ENABLE;
1556 writel_relaxed(val, &pdsp->regs->control);
1557 ret = knav_queue_pdsp_wait(&pdsp->regs->control, timeout,
1558 PDSP_CTRL_RUNNING);
1559 if (ret < 0) {
1560 dev_err(kdev->dev, "timed out on pdsp %s stop\n", pdsp->name);
1561 return ret;
1562 }
1563 pdsp->loaded = false;
1564 pdsp->started = false;
1565 return 0;
1566 }
1568 static int knav_queue_load_pdsp(struct knav_device *kdev,
1569 struct knav_pdsp_info *pdsp)
1570 {
1571 int i, ret, fwlen;
1572 const struct firmware *fw;
1573 bool found = false;
1574 u32 *fwdata;
1576 for (i = 0; i < ARRAY_SIZE(knav_acc_firmwares); i++) {
1577 if (knav_acc_firmwares[i]) {
1578 ret = request_firmware_direct(&fw,
1579 knav_acc_firmwares[i],
1580 kdev->dev);
1581 if (!ret) {
1582 found = true;
1583 break;
1584 }
1585 }
1586 }
1588 if (!found) {
1589 dev_err(kdev->dev, "failed to get firmware for pdsp\n");
1590 return -ENODEV;
1591 }
1593 dev_info(kdev->dev, "firmware file %s downloaded for PDSP\n",
1594 knav_acc_firmwares[i]);
1596 writel_relaxed(pdsp->id + 1, pdsp->command + 0x18);
1597 /* download the firmware */
1598 fwdata = (u32 *)fw->data;
1599 fwlen = (fw->size + sizeof(u32) - 1) / sizeof(u32);
1600 for (i = 0; i < fwlen; i++)
1601 writel_relaxed(be32_to_cpu(fwdata[i]), pdsp->iram + i);
1603 release_firmware(fw);
1604 return 0;
1605 }
1607 static int knav_queue_start_pdsp(struct knav_device *kdev,
1608 struct knav_pdsp_info *pdsp)
1609 {
1610 u32 val, timeout = 1000;
1611 int ret;
1613 /* write a command for sync */
1614 writel_relaxed(0xffffffff, pdsp->command);
1615 while (readl_relaxed(pdsp->command) != 0xffffffff)
1616 cpu_relax();
1618 /* soft reset the PDSP */
1619 val = readl_relaxed(&pdsp->regs->control);
1620 val &= ~(PDSP_CTRL_PC_MASK | PDSP_CTRL_SOFT_RESET);
1621 writel_relaxed(val, &pdsp->regs->control);
1623 /* enable pdsp */
1624 val = readl_relaxed(&pdsp->regs->control) | PDSP_CTRL_ENABLE;
1625 writel_relaxed(val, &pdsp->regs->control);
1627 /* wait for command register to clear */
1628 ret = knav_queue_pdsp_wait(pdsp->command, timeout, 0);
1629 if (ret < 0) {
1630 dev_err(kdev->dev,
1631 "timed out on pdsp %s command register wait\n",
1632 pdsp->name);
1633 return ret;
1634 }
1635 return 0;
1636 }
1638 static void knav_queue_stop_pdsps(struct knav_device *kdev)
1639 {
1640 struct knav_pdsp_info *pdsp;
1642 /* disable all pdsps */
1643 for_each_pdsp(kdev, pdsp)
1644 knav_queue_stop_pdsp(kdev, pdsp);
1645 }
1647 static int knav_queue_start_pdsps(struct knav_device *kdev)
1648 {
1649 struct knav_pdsp_info *pdsp;
1650 int ret;
1652 knav_queue_stop_pdsps(kdev);
1653 /* now load them all. We return success even if pdsp
1654 * is not loaded as acc channels are optional on having
1655 * firmware availability in the system. We set the loaded
1656 * and stated flag and when initialize the acc range, check
1657 * it and init the range only if pdsp is started.
1658 */
1659 for_each_pdsp(kdev, pdsp) {
1660 ret = knav_queue_load_pdsp(kdev, pdsp);
1661 if (!ret)
1662 pdsp->loaded = true;
1663 }
1665 for_each_pdsp(kdev, pdsp) {
1666 if (pdsp->loaded) {
1667 ret = knav_queue_start_pdsp(kdev, pdsp);
1668 if (!ret)
1669 pdsp->started = true;
1670 }
1671 }
1672 return 0;
1673 }
1675 static inline struct knav_qmgr_info *knav_find_qmgr(unsigned id)
1676 {
1677 struct knav_qmgr_info *qmgr;
1679 for_each_qmgr(kdev, qmgr) {
1680 if ((id >= qmgr->start_queue) &&
1681 (id < qmgr->start_queue + qmgr->num_queues))
1682 return qmgr;
1683 }
1684 return NULL;
1685 }
1687 static int knav_queue_init_queue(struct knav_device *kdev,
1688 struct knav_range_info *range,
1689 struct knav_queue_inst *inst,
1690 unsigned id)
1691 {
1692 char irq_name[KNAV_NAME_SIZE];
1693 inst->qmgr = knav_find_qmgr(id);
1694 if (!inst->qmgr)
1695 return -1;
1697 INIT_LIST_HEAD(&inst->handles);
1698 inst->kdev = kdev;
1699 inst->range = range;
1700 inst->irq_num = -1;
1701 inst->id = id;
1702 scnprintf(irq_name, sizeof(irq_name), "hwqueue-%d", id);
1703 inst->irq_name = kstrndup(irq_name, sizeof(irq_name), GFP_KERNEL);
1705 if (range->ops && range->ops->init_queue)
1706 return range->ops->init_queue(range, inst);
1707 else
1708 return 0;
1709 }
1711 static int knav_queue_init_queues(struct knav_device *kdev)
1712 {
1713 struct knav_range_info *range;
1714 int size, id, base_idx;
1715 int idx = 0, ret = 0;
1717 /* how much do we need for instance data? */
1718 size = sizeof(struct knav_queue_inst);
1720 /* round this up to a power of 2, keep the index to instance
1721 * arithmetic fast.
1722 * */
1723 kdev->inst_shift = order_base_2(size);
1724 size = (1 << kdev->inst_shift) * kdev->num_queues_in_use;
1725 kdev->instances = devm_kzalloc(kdev->dev, size, GFP_KERNEL);
1726 if (!kdev->instances)
1727 return -ENOMEM;
1729 for_each_queue_range(kdev, range) {
1730 if (range->ops && range->ops->init_range)
1731 range->ops->init_range(range);
1732 base_idx = idx;
1733 for (id = range->queue_base;
1734 id < range->queue_base + range->num_queues; id++, idx++) {
1735 ret = knav_queue_init_queue(kdev, range,
1736 knav_queue_idx_to_inst(kdev, idx), id);
1737 if (ret < 0)
1738 return ret;
1739 }
1740 range->queue_base_inst =
1741 knav_queue_idx_to_inst(kdev, base_idx);
1742 }
1743 return 0;
1744 }
1746 /* Match table for of_platform binding */
1747 static const struct of_device_id keystone_qmss_of_match[] = {
1748 {
1749 .compatible = "ti,keystone-navigator-qmss",
1750 },
1751 {
1752 .compatible = "ti,66ak2g-navss-qm",
1753 .data = (void *)QMSS_66AK2G,
1754 },
1755 {},
1756 };
1757 MODULE_DEVICE_TABLE(of, keystone_qmss_of_match);
1759 static int knav_queue_probe(struct platform_device *pdev)
1760 {
1761 struct device_node *node = pdev->dev.of_node;
1762 struct device_node *qmgrs, *queue_pools, *regions, *pdsps;
1763 const struct of_device_id *match;
1764 struct device *dev = &pdev->dev;
1765 u32 temp[2];
1766 int ret;
1768 if (!node) {
1769 dev_err(dev, "device tree info unavailable\n");
1770 return -ENODEV;
1771 }
1773 kdev = devm_kzalloc(dev, sizeof(struct knav_device), GFP_KERNEL);
1774 if (!kdev) {
1775 dev_err(dev, "memory allocation failed\n");
1776 return -ENOMEM;
1777 }
1779 match = of_match_device(of_match_ptr(keystone_qmss_of_match), dev);
1780 if (match && match->data)
1781 kdev->version = QMSS_66AK2G;
1783 platform_set_drvdata(pdev, kdev);
1784 kdev->dev = dev;
1785 INIT_LIST_HEAD(&kdev->queue_ranges);
1786 INIT_LIST_HEAD(&kdev->qmgrs);
1787 INIT_LIST_HEAD(&kdev->pools);
1788 INIT_LIST_HEAD(&kdev->regions);
1789 INIT_LIST_HEAD(&kdev->pdsps);
1791 pm_runtime_enable(&pdev->dev);
1792 ret = pm_runtime_get_sync(&pdev->dev);
1793 if (ret < 0) {
1794 dev_err(dev, "Failed to enable QMSS\n");
1795 return ret;
1796 }
1798 if (of_property_read_u32_array(node, "queue-range", temp, 2)) {
1799 dev_err(dev, "queue-range not specified\n");
1800 ret = -ENODEV;
1801 goto err;
1802 }
1803 kdev->base_id = temp[0];
1804 kdev->num_queues = temp[1];
1806 /* Initialize queue managers using device tree configuration */
1807 qmgrs = of_get_child_by_name(node, "qmgrs");
1808 if (!qmgrs) {
1809 dev_err(dev, "queue manager info not specified\n");
1810 ret = -ENODEV;
1811 goto err;
1812 }
1813 ret = knav_queue_init_qmgrs(kdev, qmgrs);
1814 of_node_put(qmgrs);
1815 if (ret)
1816 goto err;
1818 /* get pdsp configuration values from device tree */
1819 pdsps = of_get_child_by_name(node, "pdsps");
1820 if (pdsps) {
1821 ret = knav_queue_init_pdsps(kdev, pdsps);
1822 if (ret)
1823 goto err;
1825 ret = knav_queue_start_pdsps(kdev);
1826 if (ret)
1827 goto err;
1828 }
1829 of_node_put(pdsps);
1831 /* get usable queue range values from device tree */
1832 queue_pools = of_get_child_by_name(node, "queue-pools");
1833 if (!queue_pools) {
1834 dev_err(dev, "queue-pools not specified\n");
1835 ret = -ENODEV;
1836 goto err;
1837 }
1838 ret = knav_setup_queue_pools(kdev, queue_pools);
1839 of_node_put(queue_pools);
1840 if (ret)
1841 goto err;
1843 ret = knav_get_link_ram(kdev, "linkram0", &kdev->link_rams[0]);
1844 if (ret) {
1845 dev_err(kdev->dev, "could not setup linking ram\n");
1846 goto err;
1847 }
1849 ret = knav_get_link_ram(kdev, "linkram1", &kdev->link_rams[1]);
1850 if (ret) {
1851 /*
1852 * nothing really, we have one linking ram already, so we just
1853 * live within our means
1854 */
1855 }
1857 ret = knav_queue_setup_link_ram(kdev);
1858 if (ret)
1859 goto err;
1861 regions = of_get_child_by_name(node, "descriptor-regions");
1862 if (!regions) {
1863 dev_err(dev, "descriptor-regions not specified\n");
1864 goto err;
1865 }
1866 ret = knav_queue_setup_regions(kdev, regions);
1867 of_node_put(regions);
1868 if (ret)
1869 goto err;
1871 ret = knav_queue_init_queues(kdev);
1872 if (ret < 0) {
1873 dev_err(dev, "hwqueue initialization failed\n");
1874 goto err;
1875 }
1877 debugfs_create_file("qmss", S_IFREG | S_IRUGO, NULL, NULL,
1878 &knav_queue_debug_ops);
1879 device_ready = true;
1880 return 0;
1882 err:
1883 knav_queue_stop_pdsps(kdev);
1884 knav_queue_free_regions(kdev);
1885 knav_free_queue_ranges(kdev);
1886 pm_runtime_put_sync(&pdev->dev);
1887 pm_runtime_disable(&pdev->dev);
1888 return ret;
1889 }
1891 static int knav_queue_remove(struct platform_device *pdev)
1892 {
1893 /* TODO: Free resources */
1894 pm_runtime_put_sync(&pdev->dev);
1895 pm_runtime_disable(&pdev->dev);
1896 return 0;
1897 }
1899 static struct platform_driver keystone_qmss_driver = {
1900 .probe = knav_queue_probe,
1901 .remove = knav_queue_remove,
1902 .driver = {
1903 .name = "keystone-navigator-qmss",
1904 .of_match_table = keystone_qmss_of_match,
1905 },
1906 };
1907 module_platform_driver(keystone_qmss_driver);
1909 MODULE_LICENSE("GPL v2");
1910 MODULE_DESCRIPTION("TI QMSS driver for Keystone SOCs");
1911 MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com>");
1912 MODULE_AUTHOR("Santosh Shilimkar <santosh.shilimkar@ti.com>");