1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright 2016-2019 HabanaLabs, Ltd.
8 #include "habanalabs.h"
10 #include <linux/slab.h>
13 * hl_queue_add_ptr - add to pi or ci and checks if it wraps around
15 * @ptr: the current pi/ci value
16 * @val: the amount to add
18 * Add val to ptr. It can go until twice the queue length.
20 inline u32 hl_hw_queue_add_ptr(u32 ptr, u16 val)
23 ptr &= ((HL_QUEUE_LENGTH << 1) - 1);
26 static inline int queue_ci_get(atomic_t *ci, u32 queue_len)
28 return atomic_read(ci) & ((queue_len << 1) - 1);
31 static inline int queue_free_slots(struct hl_hw_queue *q, u32 queue_len)
33 int delta = (q->pi - queue_ci_get(&q->ci, queue_len));
36 return (queue_len - delta);
38 return (abs(delta) - queue_len);
41 void hl_hw_queue_update_ci(struct hl_cs *cs)
43 struct hl_device *hdev = cs->ctx->hdev;
44 struct hl_hw_queue *q;
50 q = &hdev->kernel_queues[0];
52 /* There are no internal queues if H/W queues are being used */
53 if (!hdev->asic_prop.max_queues || q->queue_type == QUEUE_TYPE_HW)
56 /* We must increment CI for every queue that will never get a
57 * completion, there are 2 scenarios this can happen:
58 * 1. All queues of a non completion CS will never get a completion.
59 * 2. Internal queues never gets completion.
61 for (i = 0 ; i < hdev->asic_prop.max_queues ; i++, q++) {
62 if (!cs_needs_completion(cs) || q->queue_type == QUEUE_TYPE_INT)
63 atomic_add(cs->jobs_in_queue_cnt[i], &q->ci);
68 * hl_hw_queue_submit_bd() - Submit a buffer descriptor to an external or a
70 * @hdev: pointer to habanalabs device structure
71 * @q: pointer to habanalabs queue structure
72 * @ctl: BD's control word
76 * This function assumes there is enough space on the queue to submit a new
77 * BD to it. It initializes the next BD and calls the device specific
78 * function to set the pi (and doorbell)
80 * This function must be called when the scheduler mutex is taken
83 void hl_hw_queue_submit_bd(struct hl_device *hdev, struct hl_hw_queue *q,
84 u32 ctl, u32 len, u64 ptr)
88 bd = q->kernel_address;
89 bd += hl_pi_2_offset(q->pi);
90 bd->ctl = cpu_to_le32(ctl);
91 bd->len = cpu_to_le32(len);
92 bd->ptr = cpu_to_le64(ptr);
94 q->pi = hl_queue_inc_ptr(q->pi);
95 hdev->asic_funcs->ring_doorbell(hdev, q->hw_queue_id, q->pi);
99 * ext_queue_sanity_checks - perform some sanity checks on external queue
101 * @hdev : pointer to hl_device structure
102 * @q : pointer to hl_hw_queue structure
103 * @num_of_entries : how many entries to check for space
104 * @reserve_cq_entry : whether to reserve an entry in the cq
106 * H/W queues spinlock should be taken before calling this function
108 * Perform the following:
109 * - Make sure we have enough space in the h/w queue
110 * - Make sure we have enough space in the completion queue
111 * - Reserve space in the completion queue (needs to be reversed if there
112 * is a failure down the road before the actual submission of work). Only
113 * do this action if reserve_cq_entry is true
116 static int ext_queue_sanity_checks(struct hl_device *hdev,
117 struct hl_hw_queue *q, int num_of_entries,
118 bool reserve_cq_entry)
120 atomic_t *free_slots =
121 &hdev->completion_queue[q->cq_id].free_slots_cnt;
124 /* Check we have enough space in the queue */
125 free_slots_cnt = queue_free_slots(q, HL_QUEUE_LENGTH);
127 if (free_slots_cnt < num_of_entries) {
128 dev_dbg(hdev->dev, "Queue %d doesn't have room for %d CBs\n",
129 q->hw_queue_id, num_of_entries);
133 if (reserve_cq_entry) {
135 * Check we have enough space in the completion queue
136 * Add -1 to counter (decrement) unless counter was already 0
137 * In that case, CQ is full so we can't submit a new CB because
138 * we won't get ack on its completion
139 * atomic_add_unless will return 0 if counter was already 0
141 if (atomic_add_negative(num_of_entries * -1, free_slots)) {
142 dev_dbg(hdev->dev, "No space for %d on CQ %d\n",
143 num_of_entries, q->hw_queue_id);
144 atomic_add(num_of_entries, free_slots);
153 * int_queue_sanity_checks - perform some sanity checks on internal queue
155 * @hdev : pointer to hl_device structure
156 * @q : pointer to hl_hw_queue structure
157 * @num_of_entries : how many entries to check for space
159 * H/W queues spinlock should be taken before calling this function
161 * Perform the following:
162 * - Make sure we have enough space in the h/w queue
165 static int int_queue_sanity_checks(struct hl_device *hdev,
166 struct hl_hw_queue *q,
171 if (num_of_entries > q->int_queue_len) {
173 "Cannot populate queue %u with %u jobs\n",
174 q->hw_queue_id, num_of_entries);
178 /* Check we have enough space in the queue */
179 free_slots_cnt = queue_free_slots(q, q->int_queue_len);
181 if (free_slots_cnt < num_of_entries) {
182 dev_dbg(hdev->dev, "Queue %d doesn't have room for %d CBs\n",
183 q->hw_queue_id, num_of_entries);
191 * hw_queue_sanity_checks() - Make sure we have enough space in the h/w queue
192 * @hdev: Pointer to hl_device structure.
193 * @q: Pointer to hl_hw_queue structure.
194 * @num_of_entries: How many entries to check for space.
196 * Notice: We do not reserve queue entries so this function mustn't be called
197 * more than once per CS for the same queue
200 static int hw_queue_sanity_checks(struct hl_device *hdev, struct hl_hw_queue *q,
205 /* Check we have enough space in the queue */
206 free_slots_cnt = queue_free_slots(q, HL_QUEUE_LENGTH);
208 if (free_slots_cnt < num_of_entries) {
209 dev_dbg(hdev->dev, "Queue %d doesn't have room for %d CBs\n",
210 q->hw_queue_id, num_of_entries);
218 * hl_hw_queue_send_cb_no_cmpl - send a single CB (not a JOB) without completion
220 * @hdev: pointer to hl_device structure
221 * @hw_queue_id: Queue's type
222 * @cb_size: size of CB
223 * @cb_ptr: pointer to CB location
225 * This function sends a single CB, that must NOT generate a completion entry.
226 * Sending CPU messages can be done instead via 'hl_hw_queue_submit_bd()'
228 int hl_hw_queue_send_cb_no_cmpl(struct hl_device *hdev, u32 hw_queue_id,
229 u32 cb_size, u64 cb_ptr)
231 struct hl_hw_queue *q = &hdev->kernel_queues[hw_queue_id];
234 hdev->asic_funcs->hw_queues_lock(hdev);
236 if (hdev->disabled) {
242 * hl_hw_queue_send_cb_no_cmpl() is called for queues of a H/W queue
243 * type only on init phase, when the queues are empty and being tested,
244 * so there is no need for sanity checks.
246 if (q->queue_type != QUEUE_TYPE_HW) {
247 rc = ext_queue_sanity_checks(hdev, q, 1, false);
252 hl_hw_queue_submit_bd(hdev, q, 0, cb_size, cb_ptr);
255 hdev->asic_funcs->hw_queues_unlock(hdev);
261 * ext_queue_schedule_job - submit a JOB to an external queue
263 * @job: pointer to the job that needs to be submitted to the queue
265 * This function must be called when the scheduler mutex is taken
268 static void ext_queue_schedule_job(struct hl_cs_job *job)
270 struct hl_device *hdev = job->cs->ctx->hdev;
271 struct hl_hw_queue *q = &hdev->kernel_queues[job->hw_queue_id];
272 struct hl_cq_entry cq_pkt;
281 * Update the JOB ID inside the BD CTL so the device would know what
282 * to write in the completion queue
284 ctl = ((q->pi << BD_CTL_SHADOW_INDEX_SHIFT) & BD_CTL_SHADOW_INDEX_MASK);
286 cb = job->patched_cb;
287 len = job->job_cb_size;
288 ptr = cb->bus_address;
290 /* Skip completion flow in case this is a non completion CS */
291 if (!cs_needs_completion(job->cs))
294 cq_pkt.data = cpu_to_le32(
295 ((q->pi << CQ_ENTRY_SHADOW_INDEX_SHIFT)
296 & CQ_ENTRY_SHADOW_INDEX_MASK) |
297 FIELD_PREP(CQ_ENTRY_SHADOW_INDEX_VALID_MASK, 1) |
298 FIELD_PREP(CQ_ENTRY_READY_MASK, 1));
301 * No need to protect pi_offset because scheduling to the
302 * H/W queues is done under the scheduler mutex
304 * No need to check if CQ is full because it was already
305 * checked in ext_queue_sanity_checks
307 cq = &hdev->completion_queue[q->cq_id];
308 cq_addr = cq->bus_address + cq->pi * sizeof(struct hl_cq_entry);
310 hdev->asic_funcs->add_end_of_cb_packets(hdev, cb->kernel_address, len,
312 le32_to_cpu(cq_pkt.data),
314 job->contains_dma_pkt);
316 q->shadow_queue[hl_pi_2_offset(q->pi)] = job;
318 cq->pi = hl_cq_inc_ptr(cq->pi);
321 hl_hw_queue_submit_bd(hdev, q, ctl, len, ptr);
325 * int_queue_schedule_job - submit a JOB to an internal queue
327 * @job: pointer to the job that needs to be submitted to the queue
329 * This function must be called when the scheduler mutex is taken
332 static void int_queue_schedule_job(struct hl_cs_job *job)
334 struct hl_device *hdev = job->cs->ctx->hdev;
335 struct hl_hw_queue *q = &hdev->kernel_queues[job->hw_queue_id];
340 bd.len = cpu_to_le32(job->job_cb_size);
342 if (job->is_kernel_allocated_cb)
343 /* bus_address is actually a mmu mapped address
344 * allocated from an internal pool
346 bd.ptr = cpu_to_le64(job->user_cb->bus_address);
348 bd.ptr = cpu_to_le64((u64) (uintptr_t) job->user_cb);
350 pi = q->kernel_address + (q->pi & (q->int_queue_len - 1)) * sizeof(bd);
353 q->pi &= ((q->int_queue_len << 1) - 1);
355 hdev->asic_funcs->pqe_write(hdev, pi, &bd);
357 hdev->asic_funcs->ring_doorbell(hdev, q->hw_queue_id, q->pi);
361 * hw_queue_schedule_job - submit a JOB to a H/W queue
363 * @job: pointer to the job that needs to be submitted to the queue
365 * This function must be called when the scheduler mutex is taken
368 static void hw_queue_schedule_job(struct hl_cs_job *job)
370 struct hl_device *hdev = job->cs->ctx->hdev;
371 struct hl_hw_queue *q = &hdev->kernel_queues[job->hw_queue_id];
373 u32 offset, ctl, len;
376 * Upon PQE completion, COMP_DATA is used as the write data to the
377 * completion queue (QMAN HBW message), and COMP_OFFSET is used as the
378 * write address offset in the SM block (QMAN LBW message).
379 * The write address offset is calculated as "COMP_OFFSET << 2".
381 offset = job->cs->sequence & (hdev->asic_prop.max_pending_cs - 1);
382 ctl = ((offset << BD_CTL_COMP_OFFSET_SHIFT) & BD_CTL_COMP_OFFSET_MASK) |
383 ((q->pi << BD_CTL_COMP_DATA_SHIFT) & BD_CTL_COMP_DATA_MASK);
385 len = job->job_cb_size;
388 * A patched CB is created only if a user CB was allocated by driver and
389 * MMU is disabled. If MMU is enabled, the user CB should be used
390 * instead. If the user CB wasn't allocated by driver, assume that it
394 ptr = job->patched_cb->bus_address;
395 else if (job->is_kernel_allocated_cb)
396 ptr = job->user_cb->bus_address;
398 ptr = (u64) (uintptr_t) job->user_cb;
400 hl_hw_queue_submit_bd(hdev, q, ctl, len, ptr);
403 static int init_signal_cs(struct hl_device *hdev,
404 struct hl_cs_job *job, struct hl_cs_compl *cs_cmpl)
406 struct hl_sync_stream_properties *prop;
407 struct hl_hw_sob *hw_sob;
411 q_idx = job->hw_queue_id;
412 prop = &hdev->kernel_queues[q_idx].sync_stream_prop;
413 hw_sob = &prop->hw_sob[prop->curr_sob_offset];
415 cs_cmpl->hw_sob = hw_sob;
416 cs_cmpl->sob_val = prop->next_sob_val;
419 "generate signal CB, sob_id: %d, sob val: %u, q_idx: %d, seq: %llu\n",
420 cs_cmpl->hw_sob->sob_id, cs_cmpl->sob_val, q_idx,
423 /* we set an EB since we must make sure all oeprations are done
424 * when sending the signal
426 hdev->asic_funcs->gen_signal_cb(hdev, job->patched_cb,
427 cs_cmpl->hw_sob->sob_id, 0, true);
429 rc = hl_cs_signal_sob_wraparound_handler(hdev, q_idx, &hw_sob, 1,
435 void hl_hw_queue_encaps_sig_set_sob_info(struct hl_device *hdev,
436 struct hl_cs *cs, struct hl_cs_job *job,
437 struct hl_cs_compl *cs_cmpl)
439 struct hl_cs_encaps_sig_handle *handle = cs->encaps_sig_hdl;
441 cs_cmpl->hw_sob = handle->hw_sob;
443 /* Note that encaps_sig_wait_offset was validated earlier in the flow
444 * for offset value which exceeds the max reserved signal count.
445 * always decrement 1 of the offset since when the user
446 * set offset 1 for example he mean to wait only for the first
447 * signal only, which will be pre_sob_val, and if he set offset 2
448 * then the value required is (pre_sob_val + 1) and so on...
450 cs_cmpl->sob_val = handle->pre_sob_val +
451 (job->encaps_sig_wait_offset - 1);
454 static int init_wait_cs(struct hl_device *hdev, struct hl_cs *cs,
455 struct hl_cs_job *job, struct hl_cs_compl *cs_cmpl)
457 struct hl_gen_wait_properties wait_prop;
458 struct hl_sync_stream_properties *prop;
459 struct hl_cs_compl *signal_cs_cmpl;
462 q_idx = job->hw_queue_id;
463 prop = &hdev->kernel_queues[q_idx].sync_stream_prop;
465 signal_cs_cmpl = container_of(cs->signal_fence,
469 if (cs->encaps_signals) {
470 /* use the encaps signal handle stored earlier in the flow
471 * and set the SOB information from the encaps
474 hl_hw_queue_encaps_sig_set_sob_info(hdev, cs, job, cs_cmpl);
476 dev_dbg(hdev->dev, "Wait for encaps signals handle, qidx(%u), CS sequence(%llu), sob val: 0x%x, offset: %u\n",
477 cs->encaps_sig_hdl->q_idx,
478 cs->encaps_sig_hdl->cs_seq,
480 job->encaps_sig_wait_offset);
482 /* Copy the SOB id and value of the signal CS */
483 cs_cmpl->hw_sob = signal_cs_cmpl->hw_sob;
484 cs_cmpl->sob_val = signal_cs_cmpl->sob_val;
487 /* check again if the signal cs already completed.
488 * if yes then don't send any wait cs since the hw_sob
489 * could be in reset already. if signal is not completed
490 * then get refcount to hw_sob to prevent resetting the sob
491 * while wait cs is not submitted.
492 * note that this check is protected by two locks,
493 * hw queue lock and completion object lock,
494 * and the same completion object lock also protects
495 * the hw_sob reset handler function.
496 * The hw_queue lock prevent out of sync of hw_sob
497 * refcount value, changed by signal/wait flows.
499 spin_lock(&signal_cs_cmpl->lock);
501 if (completion_done(&cs->signal_fence->completion)) {
502 spin_unlock(&signal_cs_cmpl->lock);
506 kref_get(&cs_cmpl->hw_sob->kref);
508 spin_unlock(&signal_cs_cmpl->lock);
511 "generate wait CB, sob_id: %d, sob_val: 0x%x, mon_id: %d, q_idx: %d, seq: %llu\n",
512 cs_cmpl->hw_sob->sob_id, cs_cmpl->sob_val,
513 prop->base_mon_id, q_idx, cs->sequence);
515 wait_prop.data = (void *) job->patched_cb;
516 wait_prop.sob_base = cs_cmpl->hw_sob->sob_id;
517 wait_prop.sob_mask = 0x1;
518 wait_prop.sob_val = cs_cmpl->sob_val;
519 wait_prop.mon_id = prop->base_mon_id;
520 wait_prop.q_idx = q_idx;
523 hdev->asic_funcs->gen_wait_cb(hdev, &wait_prop);
526 hl_fence_put(cs->signal_fence);
527 cs->signal_fence = NULL;
533 * init_signal_wait_cs - initialize a signal/wait CS
534 * @cs: pointer to the signal/wait CS
536 * H/W queues spinlock should be taken before calling this function
538 static int init_signal_wait_cs(struct hl_cs *cs)
540 struct hl_ctx *ctx = cs->ctx;
541 struct hl_device *hdev = ctx->hdev;
542 struct hl_cs_job *job;
543 struct hl_cs_compl *cs_cmpl =
544 container_of(cs->fence, struct hl_cs_compl, base_fence);
547 /* There is only one job in a signal/wait CS */
548 job = list_first_entry(&cs->job_list, struct hl_cs_job,
551 if (cs->type & CS_TYPE_SIGNAL)
552 rc = init_signal_cs(hdev, job, cs_cmpl);
553 else if (cs->type & CS_TYPE_WAIT)
554 rc = init_wait_cs(hdev, cs, job, cs_cmpl);
559 static int encaps_sig_first_staged_cs_handler
560 (struct hl_device *hdev, struct hl_cs *cs)
562 struct hl_cs_compl *cs_cmpl =
563 container_of(cs->fence,
564 struct hl_cs_compl, base_fence);
565 struct hl_cs_encaps_sig_handle *encaps_sig_hdl;
566 struct hl_encaps_signals_mgr *mgr;
569 mgr = &hdev->compute_ctx->sig_mgr;
571 spin_lock(&mgr->lock);
572 encaps_sig_hdl = idr_find(&mgr->handles, cs->encaps_sig_hdl_id);
573 if (encaps_sig_hdl) {
575 * Set handler CS sequence,
576 * the CS which contains the encapsulated signals.
578 encaps_sig_hdl->cs_seq = cs->sequence;
579 /* store the handle and set encaps signal indication,
580 * to be used later in cs_do_release to put the last
581 * reference to encaps signals handlers.
583 cs_cmpl->encaps_signals = true;
584 cs_cmpl->encaps_sig_hdl = encaps_sig_hdl;
586 /* set hw_sob pointer in completion object
587 * since it's used in cs_do_release flow to put
590 cs_cmpl->hw_sob = encaps_sig_hdl->hw_sob;
591 cs_cmpl->sob_val = encaps_sig_hdl->pre_sob_val +
592 encaps_sig_hdl->count;
594 dev_dbg(hdev->dev, "CS seq (%llu) added to encaps signal handler id (%u), count(%u), qidx(%u), sob(%u), val(%u)\n",
595 cs->sequence, encaps_sig_hdl->id,
596 encaps_sig_hdl->count,
597 encaps_sig_hdl->q_idx,
598 cs_cmpl->hw_sob->sob_id,
602 dev_err(hdev->dev, "encaps handle id(%u) wasn't found!\n",
603 cs->encaps_sig_hdl_id);
607 spin_unlock(&mgr->lock);
613 * hl_hw_queue_schedule_cs - schedule a command submission
614 * @cs: pointer to the CS
616 int hl_hw_queue_schedule_cs(struct hl_cs *cs)
618 enum hl_device_status status;
619 struct hl_cs_counters_atomic *cntr;
620 struct hl_ctx *ctx = cs->ctx;
621 struct hl_device *hdev = ctx->hdev;
622 struct hl_cs_job *job, *tmp;
623 struct hl_hw_queue *q;
624 int rc = 0, i, cq_cnt;
628 cntr = &hdev->aggregated_cs_counters;
630 hdev->asic_funcs->hw_queues_lock(hdev);
632 if (!hl_device_operational(hdev, &status)) {
633 atomic64_inc(&cntr->device_in_reset_drop_cnt);
634 atomic64_inc(&ctx->cs_counters.device_in_reset_drop_cnt);
636 "device is %s, CS rejected!\n", hdev->status[status]);
641 max_queues = hdev->asic_prop.max_queues;
643 q = &hdev->kernel_queues[0];
644 for (i = 0, cq_cnt = 0 ; i < max_queues ; i++, q++) {
645 if (cs->jobs_in_queue_cnt[i]) {
646 switch (q->queue_type) {
648 rc = ext_queue_sanity_checks(hdev, q,
649 cs->jobs_in_queue_cnt[i],
650 cs_needs_completion(cs) ?
654 rc = int_queue_sanity_checks(hdev, q,
655 cs->jobs_in_queue_cnt[i]);
658 rc = hw_queue_sanity_checks(hdev, q,
659 cs->jobs_in_queue_cnt[i]);
662 dev_err(hdev->dev, "Queue type %d is invalid\n",
670 &ctx->cs_counters.queue_full_drop_cnt);
671 atomic64_inc(&cntr->queue_full_drop_cnt);
675 if (q->queue_type == QUEUE_TYPE_EXT)
680 if ((cs->type == CS_TYPE_SIGNAL) || (cs->type == CS_TYPE_WAIT)) {
681 rc = init_signal_wait_cs(cs);
684 } else if (cs->type == CS_TYPE_COLLECTIVE_WAIT) {
685 rc = hdev->asic_funcs->collective_wait_init_cs(cs);
691 if (cs->encaps_signals && cs->staged_first) {
692 rc = encaps_sig_first_staged_cs_handler(hdev, cs);
697 spin_lock(&hdev->cs_mirror_lock);
699 /* Verify staged CS exists and add to the staged list */
700 if (cs->staged_cs && !cs->staged_first) {
701 struct hl_cs *staged_cs;
703 staged_cs = hl_staged_cs_find_first(hdev, cs->staged_sequence);
706 "Cannot find staged submission sequence %llu",
707 cs->staged_sequence);
709 goto unlock_cs_mirror;
712 if (is_staged_cs_last_exists(hdev, staged_cs)) {
714 "Staged submission sequence %llu already submitted",
715 cs->staged_sequence);
717 goto unlock_cs_mirror;
720 list_add_tail(&cs->staged_cs_node, &staged_cs->staged_cs_node);
722 /* update stream map of the first CS */
723 if (hdev->supports_wait_for_multi_cs)
724 staged_cs->fence->stream_master_qid_map |=
725 cs->fence->stream_master_qid_map;
728 list_add_tail(&cs->mirror_node, &hdev->cs_mirror_list);
730 /* Queue TDR if the CS is the first entry and if timeout is wanted */
731 first_entry = list_first_entry(&hdev->cs_mirror_list,
732 struct hl_cs, mirror_node) == cs;
733 if ((hdev->timeout_jiffies != MAX_SCHEDULE_TIMEOUT) &&
734 first_entry && cs_needs_timeout(cs)) {
735 cs->tdr_active = true;
736 schedule_delayed_work(&cs->work_tdr, cs->timeout_jiffies);
740 spin_unlock(&hdev->cs_mirror_lock);
742 list_for_each_entry_safe(job, tmp, &cs->job_list, cs_node)
743 switch (job->queue_type) {
745 ext_queue_schedule_job(job);
748 int_queue_schedule_job(job);
751 hw_queue_schedule_job(job);
757 cs->submitted = true;
762 spin_unlock(&hdev->cs_mirror_lock);
764 q = &hdev->kernel_queues[0];
765 for (i = 0 ; (i < max_queues) && (cq_cnt > 0) ; i++, q++) {
766 if ((q->queue_type == QUEUE_TYPE_EXT) &&
767 (cs->jobs_in_queue_cnt[i])) {
768 atomic_t *free_slots =
769 &hdev->completion_queue[i].free_slots_cnt;
770 atomic_add(cs->jobs_in_queue_cnt[i], free_slots);
776 hdev->asic_funcs->hw_queues_unlock(hdev);
782 * hl_hw_queue_inc_ci_kernel - increment ci for kernel's queue
784 * @hdev: pointer to hl_device structure
785 * @hw_queue_id: which queue to increment its ci
787 void hl_hw_queue_inc_ci_kernel(struct hl_device *hdev, u32 hw_queue_id)
789 struct hl_hw_queue *q = &hdev->kernel_queues[hw_queue_id];
794 static int ext_and_cpu_queue_init(struct hl_device *hdev, struct hl_hw_queue *q,
801 p = hdev->asic_funcs->cpu_accessible_dma_pool_alloc(hdev,
802 HL_QUEUE_SIZE_IN_BYTES,
805 p = hdev->asic_funcs->asic_dma_alloc_coherent(hdev,
806 HL_QUEUE_SIZE_IN_BYTES,
808 GFP_KERNEL | __GFP_ZERO);
812 q->kernel_address = p;
814 q->shadow_queue = kmalloc_array(HL_QUEUE_LENGTH,
815 sizeof(*q->shadow_queue),
817 if (!q->shadow_queue) {
819 "Failed to allocate shadow queue for H/W queue %d\n",
825 /* Make sure read/write pointers are initialized to start of queue */
826 atomic_set(&q->ci, 0);
833 hdev->asic_funcs->cpu_accessible_dma_pool_free(hdev,
834 HL_QUEUE_SIZE_IN_BYTES,
837 hdev->asic_funcs->asic_dma_free_coherent(hdev,
838 HL_QUEUE_SIZE_IN_BYTES,
845 static int int_queue_init(struct hl_device *hdev, struct hl_hw_queue *q)
849 p = hdev->asic_funcs->get_int_queue_base(hdev, q->hw_queue_id,
850 &q->bus_address, &q->int_queue_len);
853 "Failed to get base address for internal queue %d\n",
858 q->kernel_address = p;
860 atomic_set(&q->ci, 0);
865 static int cpu_queue_init(struct hl_device *hdev, struct hl_hw_queue *q)
867 return ext_and_cpu_queue_init(hdev, q, true);
870 static int ext_queue_init(struct hl_device *hdev, struct hl_hw_queue *q)
872 return ext_and_cpu_queue_init(hdev, q, false);
875 static int hw_queue_init(struct hl_device *hdev, struct hl_hw_queue *q)
879 p = hdev->asic_funcs->asic_dma_alloc_coherent(hdev,
880 HL_QUEUE_SIZE_IN_BYTES,
882 GFP_KERNEL | __GFP_ZERO);
886 q->kernel_address = p;
888 /* Make sure read/write pointers are initialized to start of queue */
889 atomic_set(&q->ci, 0);
895 static void sync_stream_queue_init(struct hl_device *hdev, u32 q_idx)
897 struct hl_sync_stream_properties *sync_stream_prop;
898 struct asic_fixed_properties *prop = &hdev->asic_prop;
899 struct hl_hw_sob *hw_sob;
900 int sob, reserved_mon_idx, queue_idx;
902 sync_stream_prop = &hdev->kernel_queues[q_idx].sync_stream_prop;
904 /* We use 'collective_mon_idx' as a running index in order to reserve
905 * monitors for collective master/slave queues.
906 * collective master queue gets 2 reserved monitors
907 * collective slave queue gets 1 reserved monitor
909 if (hdev->kernel_queues[q_idx].collective_mode ==
910 HL_COLLECTIVE_MASTER) {
911 reserved_mon_idx = hdev->collective_mon_idx;
913 /* reserve the first monitor for collective master queue */
914 sync_stream_prop->collective_mstr_mon_id[0] =
915 prop->collective_first_mon + reserved_mon_idx;
917 /* reserve the second monitor for collective master queue */
918 sync_stream_prop->collective_mstr_mon_id[1] =
919 prop->collective_first_mon + reserved_mon_idx + 1;
921 hdev->collective_mon_idx += HL_COLLECTIVE_RSVD_MSTR_MONS;
922 } else if (hdev->kernel_queues[q_idx].collective_mode ==
923 HL_COLLECTIVE_SLAVE) {
924 reserved_mon_idx = hdev->collective_mon_idx++;
926 /* reserve a monitor for collective slave queue */
927 sync_stream_prop->collective_slave_mon_id =
928 prop->collective_first_mon + reserved_mon_idx;
931 if (!hdev->kernel_queues[q_idx].supports_sync_stream)
934 queue_idx = hdev->sync_stream_queue_idx++;
936 sync_stream_prop->base_sob_id = prop->sync_stream_first_sob +
937 (queue_idx * HL_RSVD_SOBS);
938 sync_stream_prop->base_mon_id = prop->sync_stream_first_mon +
939 (queue_idx * HL_RSVD_MONS);
940 sync_stream_prop->next_sob_val = 1;
941 sync_stream_prop->curr_sob_offset = 0;
943 for (sob = 0 ; sob < HL_RSVD_SOBS ; sob++) {
944 hw_sob = &sync_stream_prop->hw_sob[sob];
946 hw_sob->sob_id = sync_stream_prop->base_sob_id + sob;
948 hdev->asic_funcs->get_sob_addr(hdev, hw_sob->sob_id);
949 hw_sob->q_idx = q_idx;
950 kref_init(&hw_sob->kref);
954 static void sync_stream_queue_reset(struct hl_device *hdev, u32 q_idx)
956 struct hl_sync_stream_properties *prop =
957 &hdev->kernel_queues[q_idx].sync_stream_prop;
960 * In case we got here due to a stuck CS, the refcnt might be bigger
961 * than 1 and therefore we reset it.
963 kref_init(&prop->hw_sob[prop->curr_sob_offset].kref);
964 prop->curr_sob_offset = 0;
965 prop->next_sob_val = 1;
969 * queue_init - main initialization function for H/W queue object
971 * @hdev: pointer to hl_device device structure
972 * @q: pointer to hl_hw_queue queue structure
973 * @hw_queue_id: The id of the H/W queue
975 * Allocate dma-able memory for the queue and initialize fields
976 * Returns 0 on success
978 static int queue_init(struct hl_device *hdev, struct hl_hw_queue *q,
983 q->hw_queue_id = hw_queue_id;
985 switch (q->queue_type) {
987 rc = ext_queue_init(hdev, q);
990 rc = int_queue_init(hdev, q);
993 rc = cpu_queue_init(hdev, q);
996 rc = hw_queue_init(hdev, q);
1002 dev_crit(hdev->dev, "wrong queue type %d during init\n",
1008 sync_stream_queue_init(hdev, q->hw_queue_id);
1019 * hw_queue_fini - destroy queue
1021 * @hdev: pointer to hl_device device structure
1022 * @q: pointer to hl_hw_queue queue structure
1024 * Free the queue memory
1026 static void queue_fini(struct hl_device *hdev, struct hl_hw_queue *q)
1032 * If we arrived here, there are no jobs waiting on this queue
1033 * so we can safely remove it.
1034 * This is because this function can only called when:
1035 * 1. Either a context is deleted, which only can occur if all its
1036 * jobs were finished
1037 * 2. A context wasn't able to be created due to failure or timeout,
1038 * which means there are no jobs on the queue yet
1040 * The only exception are the queues of the kernel context, but
1041 * if they are being destroyed, it means that the entire module is
1042 * being removed. If the module is removed, it means there is no open
1043 * user context. It also means that if a job was submitted by
1044 * the kernel driver (e.g. context creation), the job itself was
1045 * released by the kernel driver when a timeout occurred on its
1046 * Completion. Thus, we don't need to release it again.
1049 if (q->queue_type == QUEUE_TYPE_INT)
1052 kfree(q->shadow_queue);
1054 if (q->queue_type == QUEUE_TYPE_CPU)
1055 hdev->asic_funcs->cpu_accessible_dma_pool_free(hdev,
1056 HL_QUEUE_SIZE_IN_BYTES,
1059 hdev->asic_funcs->asic_dma_free_coherent(hdev,
1060 HL_QUEUE_SIZE_IN_BYTES,
1065 int hl_hw_queues_create(struct hl_device *hdev)
1067 struct asic_fixed_properties *asic = &hdev->asic_prop;
1068 struct hl_hw_queue *q;
1069 int i, rc, q_ready_cnt;
1071 hdev->kernel_queues = kcalloc(asic->max_queues,
1072 sizeof(*hdev->kernel_queues), GFP_KERNEL);
1074 if (!hdev->kernel_queues) {
1075 dev_err(hdev->dev, "Not enough memory for H/W queues\n");
1079 /* Initialize the H/W queues */
1080 for (i = 0, q_ready_cnt = 0, q = hdev->kernel_queues;
1081 i < asic->max_queues ; i++, q_ready_cnt++, q++) {
1083 q->queue_type = asic->hw_queues_props[i].type;
1084 q->supports_sync_stream =
1085 asic->hw_queues_props[i].supports_sync_stream;
1086 q->collective_mode = asic->hw_queues_props[i].collective_mode;
1087 rc = queue_init(hdev, q, i);
1090 "failed to initialize queue %d\n", i);
1091 goto release_queues;
1098 for (i = 0, q = hdev->kernel_queues ; i < q_ready_cnt ; i++, q++)
1099 queue_fini(hdev, q);
1101 kfree(hdev->kernel_queues);
1106 void hl_hw_queues_destroy(struct hl_device *hdev)
1108 struct hl_hw_queue *q;
1109 u32 max_queues = hdev->asic_prop.max_queues;
1112 for (i = 0, q = hdev->kernel_queues ; i < max_queues ; i++, q++)
1113 queue_fini(hdev, q);
1115 kfree(hdev->kernel_queues);
1118 void hl_hw_queue_reset(struct hl_device *hdev, bool hard_reset)
1120 struct hl_hw_queue *q;
1121 u32 max_queues = hdev->asic_prop.max_queues;
1124 for (i = 0, q = hdev->kernel_queues ; i < max_queues ; i++, q++) {
1126 ((!hard_reset) && (q->queue_type == QUEUE_TYPE_CPU)))
1129 atomic_set(&q->ci, 0);
1131 if (q->supports_sync_stream)
1132 sync_stream_queue_reset(hdev, q->hw_queue_id);