diff options
Diffstat (limited to 'drivers/misc/habanalabs/common/command_submission.c')
| -rw-r--r-- | drivers/misc/habanalabs/common/command_submission.c | 2182 |
1 files changed, 0 insertions, 2182 deletions
diff --git a/drivers/misc/habanalabs/common/command_submission.c b/drivers/misc/habanalabs/common/command_submission.c deleted file mode 100644 index 80c60fb41bbc..000000000000 --- a/drivers/misc/habanalabs/common/command_submission.c +++ /dev/null @@ -1,2182 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 - -/* - * Copyright 2016-2019 HabanaLabs, Ltd. - * All Rights Reserved. - */ - -#include <uapi/misc/habanalabs.h> -#include "habanalabs.h" - -#include <linux/uaccess.h> -#include <linux/slab.h> - -#define HL_CS_FLAGS_TYPE_MASK (HL_CS_FLAGS_SIGNAL | HL_CS_FLAGS_WAIT | \ - HL_CS_FLAGS_COLLECTIVE_WAIT) - -/** - * enum hl_cs_wait_status - cs wait status - * @CS_WAIT_STATUS_BUSY: cs was not completed yet - * @CS_WAIT_STATUS_COMPLETED: cs completed - * @CS_WAIT_STATUS_GONE: cs completed but fence is already gone - */ -enum hl_cs_wait_status { - CS_WAIT_STATUS_BUSY, - CS_WAIT_STATUS_COMPLETED, - CS_WAIT_STATUS_GONE -}; - -static void job_wq_completion(struct work_struct *work); -static int _hl_cs_wait_ioctl(struct hl_device *hdev, struct hl_ctx *ctx, - u64 timeout_us, u64 seq, - enum hl_cs_wait_status *status, s64 *timestamp); -static void cs_do_release(struct kref *ref); - -static void hl_sob_reset(struct kref *ref) -{ - struct hl_hw_sob *hw_sob = container_of(ref, struct hl_hw_sob, - kref); - struct hl_device *hdev = hw_sob->hdev; - - hdev->asic_funcs->reset_sob(hdev, hw_sob); -} - -void hl_sob_reset_error(struct kref *ref) -{ - struct hl_hw_sob *hw_sob = container_of(ref, struct hl_hw_sob, - kref); - struct hl_device *hdev = hw_sob->hdev; - - dev_crit(hdev->dev, - "SOB release shouldn't be called here, q_idx: %d, sob_id: %d\n", - hw_sob->q_idx, hw_sob->sob_id); -} - -/** - * hl_gen_sob_mask() - Generates a sob mask to be used in a monitor arm packet - * @sob_base: sob base id - * @sob_mask: sob user mask, each bit represents a sob offset from sob base - * @mask: generated mask - * - * Return: 0 if given parameters are valid - */ -int hl_gen_sob_mask(u16 sob_base, u8 sob_mask, u8 *mask) -{ - int i; - - if (sob_mask == 0) - return -EINVAL; - - if (sob_mask == 0x1) { - *mask = ~(1 << (sob_base & 0x7)); - } else { - /* find msb in order to verify sob range is valid */ - for (i = BITS_PER_BYTE - 1 ; i >= 0 ; i--) - if (BIT(i) & sob_mask) - break; - - if (i > (HL_MAX_SOBS_PER_MONITOR - (sob_base & 0x7) - 1)) - return -EINVAL; - - *mask = ~sob_mask; - } - - return 0; -} - -static void sob_reset_work(struct work_struct *work) -{ - struct hl_cs_compl *hl_cs_cmpl = - container_of(work, struct hl_cs_compl, sob_reset_work); - struct hl_device *hdev = hl_cs_cmpl->hdev; - - /* - * A signal CS can get completion while the corresponding wait - * for signal CS is on its way to the PQ. The wait for signal CS - * will get stuck if the signal CS incremented the SOB to its - * max value and there are no pending (submitted) waits on this - * SOB. - * We do the following to void this situation: - * 1. The wait for signal CS must get a ref for the signal CS as - * soon as possible in cs_ioctl_signal_wait() and put it - * before being submitted to the PQ but after it incremented - * the SOB refcnt in init_signal_wait_cs(). - * 2. Signal/Wait for signal CS will decrement the SOB refcnt - * here. - * These two measures guarantee that the wait for signal CS will - * reset the SOB upon completion rather than the signal CS and - * hence the above scenario is avoided. - */ - kref_put(&hl_cs_cmpl->hw_sob->kref, hl_sob_reset); - - if (hl_cs_cmpl->type == CS_TYPE_COLLECTIVE_WAIT) - hdev->asic_funcs->reset_sob_group(hdev, - hl_cs_cmpl->sob_group); - - kfree(hl_cs_cmpl); -} - -static void hl_fence_release(struct kref *kref) -{ - struct hl_fence *fence = - container_of(kref, struct hl_fence, refcount); - struct hl_cs_compl *hl_cs_cmpl = - container_of(fence, struct hl_cs_compl, base_fence); - struct hl_device *hdev = hl_cs_cmpl->hdev; - - /* EBUSY means the CS was never submitted and hence we don't have - * an attached hw_sob object that we should handle here - */ - if (fence->error == -EBUSY) - goto free; - - if ((hl_cs_cmpl->type == CS_TYPE_SIGNAL) || - (hl_cs_cmpl->type == CS_TYPE_WAIT) || - (hl_cs_cmpl->type == CS_TYPE_COLLECTIVE_WAIT)) { - - dev_dbg(hdev->dev, - "CS 0x%llx type %d finished, sob_id: %d, sob_val: 0x%x\n", - hl_cs_cmpl->cs_seq, - hl_cs_cmpl->type, - hl_cs_cmpl->hw_sob->sob_id, - hl_cs_cmpl->sob_val); - - queue_work(hdev->sob_reset_wq, &hl_cs_cmpl->sob_reset_work); - - return; - } - -free: - kfree(hl_cs_cmpl); -} - -void hl_fence_put(struct hl_fence *fence) -{ - if (fence) - kref_put(&fence->refcount, hl_fence_release); -} - -void hl_fence_get(struct hl_fence *fence) -{ - if (fence) - kref_get(&fence->refcount); -} - -static void hl_fence_init(struct hl_fence *fence, u64 sequence) -{ - kref_init(&fence->refcount); - fence->cs_sequence = sequence; - fence->error = 0; - fence->timestamp = ktime_set(0, 0); - init_completion(&fence->completion); -} - -void cs_get(struct hl_cs *cs) -{ - kref_get(&cs->refcount); -} - -static int cs_get_unless_zero(struct hl_cs *cs) -{ - return kref_get_unless_zero(&cs->refcount); -} - -static void cs_put(struct hl_cs *cs) -{ - kref_put(&cs->refcount, cs_do_release); -} - -static void cs_job_do_release(struct kref *ref) -{ - struct hl_cs_job *job = container_of(ref, struct hl_cs_job, refcount); - - kfree(job); -} - -static void cs_job_put(struct hl_cs_job *job) -{ - kref_put(&job->refcount, cs_job_do_release); -} - -bool cs_needs_completion(struct hl_cs *cs) -{ - /* In case this is a staged CS, only the last CS in sequence should - * get a completion, any non staged CS will always get a completion - */ - if (cs->staged_cs && !cs->staged_last) - return false; - - return true; -} - -bool cs_needs_timeout(struct hl_cs *cs) -{ - /* In case this is a staged CS, only the first CS in sequence should - * get a timeout, any non staged CS will always get a timeout - */ - if (cs->staged_cs && !cs->staged_first) - return false; - - return true; -} - -static bool is_cb_patched(struct hl_device *hdev, struct hl_cs_job *job) -{ - /* - * Patched CB is created for external queues jobs, and for H/W queues - * jobs if the user CB was allocated by driver and MMU is disabled. - */ - return (job->queue_type == QUEUE_TYPE_EXT || - (job->queue_type == QUEUE_TYPE_HW && - job->is_kernel_allocated_cb && - !hdev->mmu_enable)); -} - -/* - * cs_parser - parse the user command submission - * - * @hpriv : pointer to the private data of the fd - * @job : pointer to the job that holds the command submission info - * - * The function parses the command submission of the user. It calls the - * ASIC specific parser, which returns a list of memory blocks to send - * to the device as different command buffers - * - */ -static int cs_parser(struct hl_fpriv *hpriv, struct hl_cs_job *job) -{ - struct hl_device *hdev = hpriv->hdev; - struct hl_cs_parser parser; - int rc; - - parser.ctx_id = job->cs->ctx->asid; - parser.cs_sequence = job->cs->sequence; - parser.job_id = job->id; - - parser.hw_queue_id = job->hw_queue_id; - parser.job_userptr_list = &job->userptr_list; - parser.patched_cb = NULL; - parser.user_cb = job->user_cb; - parser.user_cb_size = job->user_cb_size; - parser.queue_type = job->queue_type; - parser.is_kernel_allocated_cb = job->is_kernel_allocated_cb; - job->patched_cb = NULL; - parser.completion = cs_needs_completion(job->cs); - - rc = hdev->asic_funcs->cs_parser(hdev, &parser); - - if (is_cb_patched(hdev, job)) { - if (!rc) { - job->patched_cb = parser.patched_cb; - job->job_cb_size = parser.patched_cb_size; - job->contains_dma_pkt = parser.contains_dma_pkt; - atomic_inc(&job->patched_cb->cs_cnt); - } - - /* - * Whether the parsing worked or not, we don't need the - * original CB anymore because it was already parsed and - * won't be accessed again for this CS - */ - atomic_dec(&job->user_cb->cs_cnt); - hl_cb_put(job->user_cb); - job->user_cb = NULL; - } else if (!rc) { - job->job_cb_size = job->user_cb_size; - } - - return rc; -} - -static void complete_job(struct hl_device *hdev, struct hl_cs_job *job) -{ - struct hl_cs *cs = job->cs; - - if (is_cb_patched(hdev, job)) { - hl_userptr_delete_list(hdev, &job->userptr_list); - - /* - * We might arrive here from rollback and patched CB wasn't - * created, so we need to check it's not NULL - */ - if (job->patched_cb) { - atomic_dec(&job->patched_cb->cs_cnt); - hl_cb_put(job->patched_cb); - } - } - - /* For H/W queue jobs, if a user CB was allocated by driver and MMU is - * enabled, the user CB isn't released in cs_parser() and thus should be - * released here. - * This is also true for INT queues jobs which were allocated by driver - */ - if (job->is_kernel_allocated_cb && - ((job->queue_type == QUEUE_TYPE_HW && hdev->mmu_enable) || - job->queue_type == QUEUE_TYPE_INT)) { - atomic_dec(&job->user_cb->cs_cnt); - hl_cb_put(job->user_cb); - } - - /* - * This is the only place where there can be multiple threads - * modifying the list at the same time - */ - spin_lock(&cs->job_lock); - list_del(&job->cs_node); - spin_unlock(&cs->job_lock); - - hl_debugfs_remove_job(hdev, job); - - /* We decrement reference only for a CS that gets completion - * because the reference was incremented only for this kind of CS - * right before it was scheduled. - * - * In staged submission, only the last CS marked as 'staged_last' - * gets completion, hence its release function will be called from here. - * As for all the rest CS's in the staged submission which do not get - * completion, their CS reference will be decremented by the - * 'staged_last' CS during the CS release flow. - * All relevant PQ CI counters will be incremented during the CS release - * flow by calling 'hl_hw_queue_update_ci'. - */ - if (cs_needs_completion(cs) && - (job->queue_type == QUEUE_TYPE_EXT || - job->queue_type == QUEUE_TYPE_HW)) - cs_put(cs); - - cs_job_put(job); -} - -/* - * hl_staged_cs_find_first - locate the first CS in this staged submission - * - * @hdev: pointer to device structure - * @cs_seq: staged submission sequence number - * - * @note: This function must be called under 'hdev->cs_mirror_lock' - * - * Find and return a CS pointer with the given sequence - */ -struct hl_cs *hl_staged_cs_find_first(struct hl_device *hdev, u64 cs_seq) -{ - struct hl_cs *cs; - - list_for_each_entry_reverse(cs, &hdev->cs_mirror_list, mirror_node) - if (cs->staged_cs && cs->staged_first && - cs->sequence == cs_seq) - return cs; - - return NULL; -} - -/* - * is_staged_cs_last_exists - returns true if the last CS in sequence exists - * - * @hdev: pointer to device structure - * @cs: staged submission member - * - */ -bool is_staged_cs_last_exists(struct hl_device *hdev, struct hl_cs *cs) -{ - struct hl_cs *last_entry; - - last_entry = list_last_entry(&cs->staged_cs_node, struct hl_cs, - staged_cs_node); - - if (last_entry->staged_last) - return true; - - return false; -} - -/* - * staged_cs_get - get CS reference if this CS is a part of a staged CS - * - * @hdev: pointer to device structure - * @cs: current CS - * @cs_seq: staged submission sequence number - * - * Increment CS reference for every CS in this staged submission except for - * the CS which get completion. - */ -static void staged_cs_get(struct hl_device *hdev, struct hl_cs *cs) -{ - /* Only the last CS in this staged submission will get a completion. - * We must increment the reference for all other CS's in this - * staged submission. - * Once we get a completion we will release the whole staged submission. - */ - if (!cs->staged_last) - cs_get(cs); -} - -/* - * staged_cs_put - put a CS in case it is part of staged submission - * - * @hdev: pointer to device structure - * @cs: CS to put - * - * This function decrements a CS reference (for a non completion CS) - */ -static void staged_cs_put(struct hl_device *hdev, struct hl_cs *cs) -{ - /* We release all CS's in a staged submission except the last - * CS which we have never incremented its reference. - */ - if (!cs_needs_completion(cs)) - cs_put(cs); -} - -static void cs_handle_tdr(struct hl_device *hdev, struct hl_cs *cs) -{ - bool next_entry_found = false; - struct hl_cs *next; - - if (!cs_needs_timeout(cs)) - return; - - spin_lock(&hdev->cs_mirror_lock); - - /* We need to handle tdr only once for the complete staged submission. - * Hence, we choose the CS that reaches this function first which is - * the CS marked as 'staged_last'. - */ - if (cs->staged_cs && cs->staged_last) - cs = hl_staged_cs_find_first(hdev, cs->staged_sequence); - - spin_unlock(&hdev->cs_mirror_lock); - - /* Don't cancel TDR in case this CS was timedout because we might be - * running from the TDR context - */ - if (cs && (cs->timedout || - hdev->timeout_jiffies == MAX_SCHEDULE_TIMEOUT)) - return; - - if (cs && cs->tdr_active) - cancel_delayed_work_sync(&cs->work_tdr); - - spin_lock(&hdev->cs_mirror_lock); - - /* queue TDR for next CS */ - list_for_each_entry(next, &hdev->cs_mirror_list, mirror_node) - if (cs_needs_timeout(next)) { - next_entry_found = true; - break; - } - - if (next_entry_found && !next->tdr_active) { - next->tdr_active = true; - schedule_delayed_work(&next->work_tdr, next->timeout_jiffies); - } - - spin_unlock(&hdev->cs_mirror_lock); -} - -static void cs_do_release(struct kref *ref) -{ - struct hl_cs *cs = container_of(ref, struct hl_cs, refcount); - struct hl_device *hdev = cs->ctx->hdev; - struct hl_cs_job *job, *tmp; - - cs->completed = true; - - /* - * Although if we reached here it means that all external jobs have - * finished, because each one of them took refcnt to CS, we still - * need to go over the internal jobs and complete them. Otherwise, we - * will have leaked memory and what's worse, the CS object (and - * potentially the CTX object) could be released, while the JOB - * still holds a pointer to them (but no reference). - */ - list_for_each_entry_safe(job, tmp, &cs->job_list, cs_node) - complete_job(hdev, job); - - if (!cs->submitted) { - /* In case the wait for signal CS was submitted, the put occurs - * in init_signal_wait_cs() or collective_wait_init_cs() - * right before hanging on the PQ. - */ - if (cs->type == CS_TYPE_WAIT || - cs->type == CS_TYPE_COLLECTIVE_WAIT) - hl_fence_put(cs->signal_fence); - - goto out; - } - - /* Need to update CI for all queue jobs that does not get completion */ - hl_hw_queue_update_ci(cs); - - /* remove CS from CS mirror list */ - spin_lock(&hdev->cs_mirror_lock); - list_del_init(&cs->mirror_node); - spin_unlock(&hdev->cs_mirror_lock); - - cs_handle_tdr(hdev, cs); - - if (cs->staged_cs) { - /* the completion CS decrements reference for the entire - * staged submission - */ - if (cs->staged_last) { - struct hl_cs *staged_cs, *tmp; - - list_for_each_entry_safe(staged_cs, tmp, - &cs->staged_cs_node, staged_cs_node) - staged_cs_put(hdev, staged_cs); - } - - /* A staged CS will be a member in the list only after it - * was submitted. We used 'cs_mirror_lock' when inserting - * it to list so we will use it again when removing it - */ - if (cs->submitted) { - spin_lock(&hdev->cs_mirror_lock); - list_del(&cs->staged_cs_node); - spin_unlock(&hdev->cs_mirror_lock); - } - } - -out: - /* Must be called before hl_ctx_put because inside we use ctx to get - * the device - */ - hl_debugfs_remove_cs(cs); - - hl_ctx_put(cs->ctx); - - /* We need to mark an error for not submitted because in that case - * the hl fence release flow is different. Mainly, we don't need - * to handle hw_sob for signal/wait - */ - if (cs->timedout) - cs->fence->error = -ETIMEDOUT; - else if (cs->aborted) - cs->fence->error = -EIO; - else if (!cs->submitted) - cs->fence->error = -EBUSY; - - if (unlikely(cs->skip_reset_on_timeout)) { - dev_err(hdev->dev, - "Command submission %llu completed after %llu (s)\n", - cs->sequence, - div_u64(jiffies - cs->submission_time_jiffies, HZ)); - } - - if (cs->timestamp) - cs->fence->timestamp = ktime_get(); - complete_all(&cs->fence->completion); - hl_fence_put(cs->fence); - - kfree(cs->jobs_in_queue_cnt); - kfree(cs); -} - -static void cs_timedout(struct work_struct *work) -{ - struct hl_device *hdev; - int rc; - struct hl_cs *cs = container_of(work, struct hl_cs, - work_tdr.work); - bool skip_reset_on_timeout = cs->skip_reset_on_timeout; - - rc = cs_get_unless_zero(cs); - if (!rc) - return; - - if ((!cs->submitted) || (cs->completed)) { - cs_put(cs); - return; - } - - /* Mark the CS is timed out so we won't try to cancel its TDR */ - if (likely(!skip_reset_on_timeout)) - cs->timedout = true; - - hdev = cs->ctx->hdev; - - switch (cs->type) { - case CS_TYPE_SIGNAL: - dev_err(hdev->dev, - "Signal command submission %llu has not finished in time!\n", - cs->sequence); - break; - - case CS_TYPE_WAIT: - dev_err(hdev->dev, - "Wait command submission %llu has not finished in time!\n", - cs->sequence); - break; - - case CS_TYPE_COLLECTIVE_WAIT: - dev_err(hdev->dev, - "Collective Wait command submission %llu has not finished in time!\n", - cs->sequence); - break; - - default: - dev_err(hdev->dev, - "Command submission %llu has not finished in time!\n", - cs->sequence); - break; - } - - cs_put(cs); - - if (likely(!skip_reset_on_timeout)) { - if (hdev->reset_on_lockup) - hl_device_reset(hdev, HL_RESET_TDR); - else - hdev->needs_reset = true; - } -} - -static int allocate_cs(struct hl_device *hdev, struct hl_ctx *ctx, - enum hl_cs_type cs_type, u64 user_sequence, - struct hl_cs **cs_new, u32 flags, u32 timeout) -{ - struct hl_cs_counters_atomic *cntr; - struct hl_fence *other = NULL; - struct hl_cs_compl *cs_cmpl; - struct hl_cs *cs; - int rc; - - cntr = &hdev->aggregated_cs_counters; - - cs = kzalloc(sizeof(*cs), GFP_ATOMIC); - if (!cs) - cs = kzalloc(sizeof(*cs), GFP_KERNEL); - - if (!cs) { - atomic64_inc(&ctx->cs_counters.out_of_mem_drop_cnt); - atomic64_inc(&cntr->out_of_mem_drop_cnt); - return -ENOMEM; - } - - /* increment refcnt for context */ - hl_ctx_get(hdev, ctx); - - cs->ctx = ctx; - cs->submitted = false; - cs->completed = false; - cs->type = cs_type; - cs->timestamp = !!(flags & HL_CS_FLAGS_TIMESTAMP); - cs->timeout_jiffies = timeout; - cs->skip_reset_on_timeout = - hdev->skip_reset_on_timeout || - !!(flags & HL_CS_FLAGS_SKIP_RESET_ON_TIMEOUT); - cs->submission_time_jiffies = jiffies; - INIT_LIST_HEAD(&cs->job_list); - INIT_DELAYED_WORK(&cs->work_tdr, cs_timedout); - kref_init(&cs->refcount); - spin_lock_init(&cs->job_lock); - - cs_cmpl = kmalloc(sizeof(*cs_cmpl), GFP_ATOMIC); - if (!cs_cmpl) - cs_cmpl = kmalloc(sizeof(*cs_cmpl), GFP_KERNEL); - - if (!cs_cmpl) { - atomic64_inc(&ctx->cs_counters.out_of_mem_drop_cnt); - atomic64_inc(&cntr->out_of_mem_drop_cnt); - rc = -ENOMEM; - goto free_cs; - } - - cs->jobs_in_queue_cnt = kcalloc(hdev->asic_prop.max_queues, - sizeof(*cs->jobs_in_queue_cnt), GFP_ATOMIC); - if (!cs->jobs_in_queue_cnt) - cs->jobs_in_queue_cnt = kcalloc(hdev->asic_prop.max_queues, - sizeof(*cs->jobs_in_queue_cnt), GFP_KERNEL); - - if (!cs->jobs_in_queue_cnt) { - atomic64_inc(&ctx->cs_counters.out_of_mem_drop_cnt); - atomic64_inc(&cntr->out_of_mem_drop_cnt); - rc = -ENOMEM; - goto free_cs_cmpl; - } - - cs_cmpl->hdev = hdev; - cs_cmpl->type = cs->type; - spin_lock_init(&cs_cmpl->lock); - INIT_WORK(&cs_cmpl->sob_reset_work, sob_reset_work); - cs->fence = &cs_cmpl->base_fence; - - spin_lock(&ctx->cs_lock); - - cs_cmpl->cs_seq = ctx->cs_sequence; - other = ctx->cs_pending[cs_cmpl->cs_seq & - (hdev->asic_prop.max_pending_cs - 1)]; - - if (other && !completion_done(&other->completion)) { - /* If the following statement is true, it means we have reached - * a point in which only part of the staged submission was - * submitted and we don't have enough room in the 'cs_pending' - * array for the rest of the submission. - * This causes a deadlock because this CS will never be - * completed as it depends on future CS's for completion. - */ - if (other->cs_sequence == user_sequence) - dev_crit_ratelimited(hdev->dev, - "Staged CS %llu deadlock due to lack of resources", - user_sequence); - - dev_dbg_ratelimited(hdev->dev, - "Rejecting CS because of too many in-flights CS\n"); - atomic64_inc(&ctx->cs_counters.max_cs_in_flight_drop_cnt); - atomic64_inc(&cntr->max_cs_in_flight_drop_cnt); - rc = -EAGAIN; - goto free_fence; - } - - /* init hl_fence */ - hl_fence_init(&cs_cmpl->base_fence, cs_cmpl->cs_seq); - - cs->sequence = cs_cmpl->cs_seq; - - ctx->cs_pending[cs_cmpl->cs_seq & - (hdev->asic_prop.max_pending_cs - 1)] = - &cs_cmpl->base_fence; - ctx->cs_sequence++; - - hl_fence_get(&cs_cmpl->base_fence); - - hl_fence_put(other); - - spin_unlock(&ctx->cs_lock); - - *cs_new = cs; - - return 0; - -free_fence: - spin_unlock(&ctx->cs_lock); - kfree(cs->jobs_in_queue_cnt); -free_cs_cmpl: - kfree(cs_cmpl); -free_cs: - kfree(cs); - hl_ctx_put(ctx); - return rc; -} - -static void cs_rollback(struct hl_device *hdev, struct hl_cs *cs) -{ - struct hl_cs_job *job, *tmp; - - staged_cs_put(hdev, cs); - - list_for_each_entry_safe(job, tmp, &cs->job_list, cs_node) - complete_job(hdev, job); -} - -void hl_cs_rollback_all(struct hl_device *hdev) -{ - int i; - struct hl_cs *cs, *tmp; - - flush_workqueue(hdev->sob_reset_wq); - - /* flush all completions before iterating over the CS mirror list in - * order to avoid a race with the release functions - */ - for (i = 0 ; i < hdev->asic_prop.completion_queues_count ; i++) - flush_workqueue(hdev->cq_wq[i]); - - /* Make sure we don't have leftovers in the CS mirror list */ - list_for_each_entry_safe(cs, tmp, &hdev->cs_mirror_list, mirror_node) { - cs_get(cs); - cs->aborted = true; - dev_warn_ratelimited(hdev->dev, "Killing CS %d.%llu\n", - cs->ctx->asid, cs->sequence); - cs_rollback(hdev, cs); - cs_put(cs); - } -} - -void hl_pending_cb_list_flush(struct hl_ctx *ctx) -{ - struct hl_pending_cb *pending_cb, *tmp; - - list_for_each_entry_safe(pending_cb, tmp, - &ctx->pending_cb_list, cb_node) { - list_del(&pending_cb->cb_node); - hl_cb_put(pending_cb->cb); - kfree(pending_cb); - } -} - -static void -wake_pending_user_interrupt_threads(struct hl_user_interrupt *interrupt) -{ - struct hl_user_pending_interrupt *pend; - - spin_lock(&interrupt->wait_list_lock); - list_for_each_entry(pend, &interrupt->wait_list_head, wait_list_node) { - pend->fence.error = -EIO; - complete_all(&pend->fence.completion); - } - spin_unlock(&interrupt->wait_list_lock); -} - -void hl_release_pending_user_interrupts(struct hl_device *hdev) -{ - struct asic_fixed_properties *prop = &hdev->asic_prop; - struct hl_user_interrupt *interrupt; - int i; - - if (!prop->user_interrupt_count) - return; - - /* We iterate through the user interrupt requests and waking up all - * user threads waiting for interrupt completion. We iterate the - * list under a lock, this is why all user threads, once awake, - * will wait on the same lock and will release the waiting object upon - * unlock. - */ - - for (i = 0 ; i < prop->user_interrupt_count ; i++) { - interrupt = &hdev->user_interrupt[i]; - wake_pending_user_interrupt_threads(interrupt); - } - - interrupt = &hdev->common_user_interrupt; - wake_pending_user_interrupt_threads(interrupt); -} - -static void job_wq_completion(struct work_struct *work) -{ - struct hl_cs_job *job = container_of(work, struct hl_cs_job, - finish_work); - struct hl_cs *cs = job->cs; - struct hl_device *hdev = cs->ctx->hdev; - - /* job is no longer needed */ - complete_job(hdev, job); -} - -static int validate_queue_index(struct hl_device *hdev, - struct hl_cs_chunk *chunk, - enum hl_queue_type *queue_type, - bool *is_kernel_allocated_cb) -{ - struct asic_fixed_properties *asic = &hdev->asic_prop; - struct hw_queue_properties *hw_queue_prop; - - /* This must be checked here to prevent out-of-bounds access to - * hw_queues_props array - */ - if (chunk->queue_index >= asic->max_queues) { - dev_err(hdev->dev, "Queue index %d is invalid\n", - chunk->queue_index); - return -EINVAL; - } - - hw_queue_prop = &asic->hw_queues_props[chunk->queue_index]; - - if (hw_queue_prop->type == QUEUE_TYPE_NA) { - dev_err(hdev->dev, "Queue index %d is invalid\n", - chunk->queue_index); - return -EINVAL; - } - - if (hw_queue_prop->driver_only) { - dev_err(hdev->dev, - "Queue index %d is restricted for the kernel driver\n", - chunk->queue_index); - return -EINVAL; - } - - /* When hw queue type isn't QUEUE_TYPE_HW, - * USER_ALLOC_CB flag shall be referred as "don't care". - */ - if (hw_queue_prop->type == QUEUE_TYPE_HW) { - if (chunk->cs_chunk_flags & HL_CS_CHUNK_FLAGS_USER_ALLOC_CB) { - if (!(hw_queue_prop->cb_alloc_flags & CB_ALLOC_USER)) { - dev_err(hdev->dev, - "Queue index %d doesn't support user CB\n", - chunk->queue_index); - return -EINVAL; - } - - *is_kernel_allocated_cb = false; - } else { - if (!(hw_queue_prop->cb_alloc_flags & - CB_ALLOC_KERNEL)) { - dev_err(hdev->dev, - "Queue index %d doesn't support kernel CB\n", - chunk->queue_index); - return -EINVAL; - } - - *is_kernel_allocated_cb = true; - } - } else { - *is_kernel_allocated_cb = !!(hw_queue_prop->cb_alloc_flags - & CB_ALLOC_KERNEL); - } - - *queue_type = hw_queue_prop->type; - return 0; -} - -static struct hl_cb *get_cb_from_cs_chunk(struct hl_device *hdev, - struct hl_cb_mgr *cb_mgr, - struct hl_cs_chunk *chunk) -{ - struct hl_cb *cb; - u32 cb_handle; - - cb_handle = (u32) (chunk->cb_handle >> PAGE_SHIFT); - - cb = hl_cb_get(hdev, cb_mgr, cb_handle); - if (!cb) { - dev_err(hdev->dev, "CB handle 0x%x invalid\n", cb_handle); - return NULL; - } - - if ((chunk->cb_size < 8) || (chunk->cb_size > cb->size)) { - dev_err(hdev->dev, "CB size %u invalid\n", chunk->cb_size); - goto release_cb; - } - - atomic_inc(&cb->cs_cnt); - - return cb; - -release_cb: - hl_cb_put(cb); - return NULL; -} - -struct hl_cs_job *hl_cs_allocate_job(struct hl_device *hdev, - enum hl_queue_type queue_type, bool is_kernel_allocated_cb) -{ - struct hl_cs_job *job; - - job = kzalloc(sizeof(*job), GFP_ATOMIC); - if (!job) - job = kzalloc(sizeof(*job), GFP_KERNEL); - - if (!job) - return NULL; - - kref_init(&job->refcount); - job->queue_type = queue_type; - job->is_kernel_allocated_cb = is_kernel_allocated_cb; - - if (is_cb_patched(hdev, job)) - INIT_LIST_HEAD(&job->userptr_list); - - if (job->queue_type == QUEUE_TYPE_EXT) - INIT_WORK(&job->finish_work, job_wq_completion); - - return job; -} - -static enum hl_cs_type hl_cs_get_cs_type(u32 cs_type_flags) -{ - if (cs_type_flags & HL_CS_FLAGS_SIGNAL) - return CS_TYPE_SIGNAL; - else if (cs_type_flags & HL_CS_FLAGS_WAIT) - return CS_TYPE_WAIT; - else if (cs_type_flags & HL_CS_FLAGS_COLLECTIVE_WAIT) - return CS_TYPE_COLLECTIVE_WAIT; - else - return CS_TYPE_DEFAULT; -} - -static int hl_cs_sanity_checks(struct hl_fpriv *hpriv, union hl_cs_args *args) -{ - struct hl_device *hdev = hpriv->hdev; - struct hl_ctx *ctx = hpriv->ctx; - u32 cs_type_flags, num_chunks; - enum hl_device_status status; - enum hl_cs_type cs_type; - - if (!hl_device_operational(hdev, &status)) { - dev_warn_ratelimited(hdev->dev, - "Device is %s. Can't submit new CS\n", - hdev->status[status]); - return -EBUSY; - } - - if ((args->in.cs_flags & HL_CS_FLAGS_STAGED_SUBMISSION) && - !hdev->supports_staged_submission) { - dev_err(hdev->dev, "staged submission not supported"); - return -EPERM; - } - - cs_type_flags = args->in.cs_flags & HL_CS_FLAGS_TYPE_MASK; - - if (unlikely(cs_type_flags && !is_power_of_2(cs_type_flags))) { - dev_err(hdev->dev, - "CS type flags are mutually exclusive, context %d\n", - ctx->asid); - return -EINVAL; - } - - cs_type = hl_cs_get_cs_type(cs_type_flags); - num_chunks = args->in.num_chunks_execute; - - if (unlikely((cs_type != CS_TYPE_DEFAULT) && - !hdev->supports_sync_stream)) { - dev_err(hdev->dev, "Sync stream CS is not supported\n"); - return -EINVAL; - } - - if (cs_type == CS_TYPE_DEFAULT) { - if (!num_chunks) { - dev_err(hdev->dev, - "Got execute CS with 0 chunks, context %d\n", - ctx->asid); - return -EINVAL; - } - } else if (num_chunks != 1) { - dev_err(hdev->dev, - "Sync stream CS mandates one chunk only, context %d\n", - ctx->asid); - return -EINVAL; - } - - return 0; -} - -static int hl_cs_copy_chunk_array(struct hl_device *hdev, - struct hl_cs_chunk **cs_chunk_array, - void __user *chunks, u32 num_chunks, - struct hl_ctx *ctx) -{ - u32 size_to_copy; - - if (num_chunks > HL_MAX_JOBS_PER_CS) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&hdev->aggregated_cs_counters.validation_drop_cnt); - dev_err(hdev->dev, - "Number of chunks can NOT be larger than %d\n", - HL_MAX_JOBS_PER_CS); - return -EINVAL; - } - - *cs_chunk_array = kmalloc_array(num_chunks, sizeof(**cs_chunk_array), - GFP_ATOMIC); - if (!*cs_chunk_array) - *cs_chunk_array = kmalloc_array(num_chunks, - sizeof(**cs_chunk_array), GFP_KERNEL); - if (!*cs_chunk_array) { - atomic64_inc(&ctx->cs_counters.out_of_mem_drop_cnt); - atomic64_inc(&hdev->aggregated_cs_counters.out_of_mem_drop_cnt); - return -ENOMEM; - } - - size_to_copy = num_chunks * sizeof(struct hl_cs_chunk); - if (copy_from_user(*cs_chunk_array, chunks, size_to_copy)) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&hdev->aggregated_cs_counters.validation_drop_cnt); - dev_err(hdev->dev, "Failed to copy cs chunk array from user\n"); - kfree(*cs_chunk_array); - return -EFAULT; - } - - return 0; -} - -static int cs_staged_submission(struct hl_device *hdev, struct hl_cs *cs, - u64 sequence, u32 flags) -{ - if (!(flags & HL_CS_FLAGS_STAGED_SUBMISSION)) - return 0; - - cs->staged_last = !!(flags & HL_CS_FLAGS_STAGED_SUBMISSION_LAST); - cs->staged_first = !!(flags & HL_CS_FLAGS_STAGED_SUBMISSION_FIRST); - - if (cs->staged_first) { - /* Staged CS sequence is the first CS sequence */ - INIT_LIST_HEAD(&cs->staged_cs_node); - cs->staged_sequence = cs->sequence; - } else { - /* User sequence will be validated in 'hl_hw_queue_schedule_cs' - * under the cs_mirror_lock - */ - cs->staged_sequence = sequence; - } - - /* Increment CS reference if needed */ - staged_cs_get(hdev, cs); - - cs->staged_cs = true; - - return 0; -} - -static int cs_ioctl_default(struct hl_fpriv *hpriv, void __user *chunks, - u32 num_chunks, u64 *cs_seq, u32 flags, - u32 timeout) -{ - bool staged_mid, int_queues_only = true; - struct hl_device *hdev = hpriv->hdev; - struct hl_cs_chunk *cs_chunk_array; - struct hl_cs_counters_atomic *cntr; - struct hl_ctx *ctx = hpriv->ctx; - struct hl_cs_job *job; - struct hl_cs *cs; - struct hl_cb *cb; - u64 user_sequence; - int rc, i; - - cntr = &hdev->aggregated_cs_counters; - user_sequence = *cs_seq; - *cs_seq = ULLONG_MAX; - - rc = hl_cs_copy_chunk_array(hdev, &cs_chunk_array, chunks, num_chunks, - hpriv->ctx); - if (rc) - goto out; - - if ((flags & HL_CS_FLAGS_STAGED_SUBMISSION) && - !(flags & HL_CS_FLAGS_STAGED_SUBMISSION_FIRST)) - staged_mid = true; - else - staged_mid = false; - - rc = allocate_cs(hdev, hpriv->ctx, CS_TYPE_DEFAULT, - staged_mid ? user_sequence : ULLONG_MAX, &cs, flags, - timeout); - if (rc) - goto free_cs_chunk_array; - - *cs_seq = cs->sequence; - - hl_debugfs_add_cs(cs); - - rc = cs_staged_submission(hdev, cs, user_sequence, flags); - if (rc) - goto free_cs_object; - - /* Validate ALL the CS chunks before submitting the CS */ - for (i = 0 ; i < num_chunks ; i++) { - struct hl_cs_chunk *chunk = &cs_chunk_array[i]; - enum hl_queue_type queue_type; - bool is_kernel_allocated_cb; - - rc = validate_queue_index(hdev, chunk, &queue_type, - &is_kernel_allocated_cb); - if (rc) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&cntr->validation_drop_cnt); - goto free_cs_object; - } - - if (is_kernel_allocated_cb) { - cb = get_cb_from_cs_chunk(hdev, &hpriv->cb_mgr, chunk); - if (!cb) { - atomic64_inc( - &ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&cntr->validation_drop_cnt); - rc = -EINVAL; - goto free_cs_object; - } - } else { - cb = (struct hl_cb *) (uintptr_t) chunk->cb_handle; - } - - if (queue_type == QUEUE_TYPE_EXT || queue_type == QUEUE_TYPE_HW) - int_queues_only = false; - - job = hl_cs_allocate_job(hdev, queue_type, - is_kernel_allocated_cb); - if (!job) { - atomic64_inc(&ctx->cs_counters.out_of_mem_drop_cnt); - atomic64_inc(&cntr->out_of_mem_drop_cnt); - dev_err(hdev->dev, "Failed to allocate a new job\n"); - rc = -ENOMEM; - if (is_kernel_allocated_cb) - goto release_cb; - - goto free_cs_object; - } - - job->id = i + 1; - job->cs = cs; - job->user_cb = cb; - job->user_cb_size = chunk->cb_size; - job->hw_queue_id = chunk->queue_index; - - cs->jobs_in_queue_cnt[job->hw_queue_id]++; - - list_add_tail(&job->cs_node, &cs->job_list); - - /* - * Increment CS reference. When CS reference is 0, CS is - * done and can be signaled to user and free all its resources - * Only increment for JOB on external or H/W queues, because - * only for those JOBs we get completion - */ - if (cs_needs_completion(cs) && - (job->queue_type == QUEUE_TYPE_EXT || - job->queue_type == QUEUE_TYPE_HW)) - cs_get(cs); - - hl_debugfs_add_job(hdev, job); - - rc = cs_parser(hpriv, job); - if (rc) { - atomic64_inc(&ctx->cs_counters.parsing_drop_cnt); - atomic64_inc(&cntr->parsing_drop_cnt); - dev_err(hdev->dev, - "Failed to parse JOB %d.%llu.%d, err %d, rejecting the CS\n", - cs->ctx->asid, cs->sequence, job->id, rc); - goto free_cs_object; - } - } - - /* We allow a CS with any queue type combination as long as it does - * not get a completion - */ - if (int_queues_only && cs_needs_completion(cs)) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&cntr->validation_drop_cnt); - dev_err(hdev->dev, - "Reject CS %d.%llu since it contains only internal queues jobs and needs completion\n", - cs->ctx->asid, cs->sequence); - rc = -EINVAL; - goto free_cs_object; - } - - rc = hl_hw_queue_schedule_cs(cs); - if (rc) { - if (rc != -EAGAIN) - dev_err(hdev->dev, - "Failed to submit CS %d.%llu to H/W queues, error %d\n", - cs->ctx->asid, cs->sequence, rc); - goto free_cs_object; - } - - rc = HL_CS_STATUS_SUCCESS; - goto put_cs; - -release_cb: - atomic_dec(&cb->cs_cnt); - hl_cb_put(cb); -free_cs_object: - cs_rollback(hdev, cs); - *cs_seq = ULLONG_MAX; - /* The path below is both for good and erroneous exits */ -put_cs: - /* We finished with the CS in this function, so put the ref */ - cs_put(cs); -free_cs_chunk_array: - kfree(cs_chunk_array); -out: - return rc; -} - -static int pending_cb_create_job(struct hl_device *hdev, struct hl_ctx *ctx, - struct hl_cs *cs, struct hl_cb *cb, u32 size, u32 hw_queue_id) -{ - struct hw_queue_properties *hw_queue_prop; - struct hl_cs_counters_atomic *cntr; - struct hl_cs_job *job; - - hw_queue_prop = &hdev->asic_prop.hw_queues_props[hw_queue_id]; - cntr = &hdev->aggregated_cs_counters; - - job = hl_cs_allocate_job(hdev, hw_queue_prop->type, true); - if (!job) { - atomic64_inc(&ctx->cs_counters.out_of_mem_drop_cnt); - atomic64_inc(&cntr->out_of_mem_drop_cnt); - dev_err(hdev->dev, "Failed to allocate a new job\n"); - return -ENOMEM; - } - - job->id = 0; - job->cs = cs; - job->user_cb = cb; - atomic_inc(&job->user_cb->cs_cnt); - job->user_cb_size = size; - job->hw_queue_id = hw_queue_id; - job->patched_cb = job->user_cb; - job->job_cb_size = job->user_cb_size; - - /* increment refcount as for external queues we get completion */ - cs_get(cs); - - cs->jobs_in_queue_cnt[job->hw_queue_id]++; - - list_add_tail(&job->cs_node, &cs->job_list); - - hl_debugfs_add_job(hdev, job); - - return 0; -} - -static int hl_submit_pending_cb(struct hl_fpriv *hpriv) -{ - struct hl_device *hdev = hpriv->hdev; - struct hl_ctx *ctx = hpriv->ctx; - struct hl_pending_cb *pending_cb, *tmp; - struct list_head local_cb_list; - struct hl_cs *cs; - struct hl_cb *cb; - u32 hw_queue_id; - u32 cb_size; - int process_list, rc = 0; - - if (list_empty(&ctx->pending_cb_list)) - return 0; - - process_list = atomic_cmpxchg(&ctx->thread_pending_cb_token, 1, 0); - - /* Only a single thread is allowed to process the list */ - if (!process_list) - return 0; - - if (list_empty(&ctx->pending_cb_list)) - goto free_pending_cb_token; - - /* move all list elements to a local list */ - INIT_LIST_HEAD(&local_cb_list); - spin_lock(&ctx->pending_cb_lock); - list_for_each_entry_safe(pending_cb, tmp, &ctx->pending_cb_list, - cb_node) - list_move_tail(&pending_cb->cb_node, &local_cb_list); - spin_unlock(&ctx->pending_cb_lock); - - rc = allocate_cs(hdev, ctx, CS_TYPE_DEFAULT, ULLONG_MAX, &cs, 0, - hdev->timeout_jiffies); - if (rc) - goto add_list_elements; - - hl_debugfs_add_cs(cs); - - /* Iterate through pending cb list, create jobs and add to CS */ - list_for_each_entry(pending_cb, &local_cb_list, cb_node) { - cb = pending_cb->cb; - cb_size = pending_cb->cb_size; - hw_queue_id = pending_cb->hw_queue_id; - - rc = pending_cb_create_job(hdev, ctx, cs, cb, cb_size, - hw_queue_id); - if (rc) - goto free_cs_object; - } - - rc = hl_hw_queue_schedule_cs(cs); - if (rc) { - if (rc != -EAGAIN) - dev_err(hdev->dev, - "Failed to submit CS %d.%llu (%d)\n", - ctx->asid, cs->sequence, rc); - goto free_cs_object; - } - - /* pending cb was scheduled successfully */ - list_for_each_entry_safe(pending_cb, tmp, &local_cb_list, cb_node) { - list_del(&pending_cb->cb_node); - kfree(pending_cb); - } - - cs_put(cs); - - goto free_pending_cb_token; - -free_cs_object: - cs_rollback(hdev, cs); - cs_put(cs); -add_list_elements: - spin_lock(&ctx->pending_cb_lock); - list_for_each_entry_safe_reverse(pending_cb, tmp, &local_cb_list, - cb_node) - list_move(&pending_cb->cb_node, &ctx->pending_cb_list); - spin_unlock(&ctx->pending_cb_lock); -free_pending_cb_token: - atomic_set(&ctx->thread_pending_cb_token, 1); - - return rc; -} - -static int hl_cs_ctx_switch(struct hl_fpriv *hpriv, union hl_cs_args *args, - u64 *cs_seq) -{ - struct hl_device *hdev = hpriv->hdev; - struct hl_ctx *ctx = hpriv->ctx; - bool need_soft_reset = false; - int rc = 0, do_ctx_switch; - void __user *chunks; - u32 num_chunks, tmp; - int ret; - - do_ctx_switch = atomic_cmpxchg(&ctx->thread_ctx_switch_token, 1, 0); - - if (do_ctx_switch || (args->in.cs_flags & HL_CS_FLAGS_FORCE_RESTORE)) { - mutex_lock(&hpriv->restore_phase_mutex); - - if (do_ctx_switch) { - rc = hdev->asic_funcs->context_switch(hdev, ctx->asid); - if (rc) { - dev_err_ratelimited(hdev->dev, - "Failed to switch to context %d, rejecting CS! %d\n", - ctx->asid, rc); - /* - * If we timedout, or if the device is not IDLE - * while we want to do context-switch (-EBUSY), - * we need to soft-reset because QMAN is - * probably stuck. However, we can't call to - * reset here directly because of deadlock, so - * need to do it at the very end of this - * function - */ - if ((rc == -ETIMEDOUT) || (rc == -EBUSY)) - need_soft_reset = true; - mutex_unlock(&hpriv->restore_phase_mutex); - goto out; - } - } - - hdev->asic_funcs->restore_phase_topology(hdev); - - chunks = (void __user *) (uintptr_t) args->in.chunks_restore; - num_chunks = args->in.num_chunks_restore; - - if (!num_chunks) { - dev_dbg(hdev->dev, - "Need to run restore phase but restore CS is empty\n"); - rc = 0; - } else { - rc = cs_ioctl_default(hpriv, chunks, num_chunks, - cs_seq, 0, hdev->timeout_jiffies); - } - - mutex_unlock(&hpriv->restore_phase_mutex); - - if (rc) { - dev_err(hdev->dev, - "Failed to submit restore CS for context %d (%d)\n", - ctx->asid, rc); - goto out; - } - - /* Need to wait for restore completion before execution phase */ - if (num_chunks) { - enum hl_cs_wait_status status; -wait_again: - ret = _hl_cs_wait_ioctl(hdev, ctx, - jiffies_to_usecs(hdev->timeout_jiffies), - *cs_seq, &status, NULL); - if (ret) { - if (ret == -ERESTARTSYS) { - usleep_range(100, 200); - goto wait_again; - } - - dev_err(hdev->dev, - "Restore CS for context %d failed to complete %d\n", - ctx->asid, ret); - rc = -ENOEXEC; - goto out; - } - } - - ctx->thread_ctx_switch_wait_token = 1; - - } else if (!ctx->thread_ctx_switch_wait_token) { - rc = hl_poll_timeout_memory(hdev, - &ctx->thread_ctx_switch_wait_token, tmp, (tmp == 1), - 100, jiffies_to_usecs(hdev->timeout_jiffies), false); - - if (rc == -ETIMEDOUT) { - dev_err(hdev->dev, - "context switch phase timeout (%d)\n", tmp); - goto out; - } - } - -out: - if ((rc == -ETIMEDOUT || rc == -EBUSY) && (need_soft_reset)) - hl_device_reset(hdev, 0); - - return rc; -} - -/* - * hl_cs_signal_sob_wraparound_handler: handle SOB value wrapaound case. - * if the SOB value reaches the max value move to the other SOB reserved - * to the queue. - * Note that this function must be called while hw_queues_lock is taken. - */ -int hl_cs_signal_sob_wraparound_handler(struct hl_device *hdev, u32 q_idx, - struct hl_hw_sob **hw_sob, u32 count) -{ - struct hl_sync_stream_properties *prop; - struct hl_hw_sob *sob = *hw_sob, *other_sob; - u8 other_sob_offset; - - prop = &hdev->kernel_queues[q_idx].sync_stream_prop; - - kref_get(&sob->kref); - - /* check for wraparound */ - if (prop->next_sob_val + count >= HL_MAX_SOB_VAL) { - /* - * Decrement as we reached the max value. - * The release function won't be called here as we've - * just incremented the refcount right before calling this - * function. - */ - kref_put(&sob->kref, hl_sob_reset_error); - - /* - * check the other sob value, if it still in use then fail - * otherwise make the switch - */ - other_sob_offset = (prop->curr_sob_offset + 1) % HL_RSVD_SOBS; - other_sob = &prop->hw_sob[other_sob_offset]; - - if (kref_read(&other_sob->kref) != 1) { - dev_err(hdev->dev, "error: Cannot switch SOBs q_idx: %d\n", - q_idx); - return -EINVAL; - } - - prop->next_sob_val = 1; - - /* only two SOBs are currently in use */ - prop->curr_sob_offset = other_sob_offset; - *hw_sob = other_sob; - - dev_dbg(hdev->dev, "switched to SOB %d, q_idx: %d\n", - prop->curr_sob_offset, q_idx); - } else { - prop->next_sob_val += count; - } - - return 0; -} - -static int cs_ioctl_extract_signal_seq(struct hl_device *hdev, - struct hl_cs_chunk *chunk, u64 *signal_seq, struct hl_ctx *ctx) -{ - u64 *signal_seq_arr = NULL; - u32 size_to_copy, signal_seq_arr_len; - int rc = 0; - - signal_seq_arr_len = chunk->num_signal_seq_arr; - - /* currently only one signal seq is supported */ - if (signal_seq_arr_len != 1) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&hdev->aggregated_cs_counters.validation_drop_cnt); - dev_err(hdev->dev, - "Wait for signal CS supports only one signal CS seq\n"); - return -EINVAL; - } - - signal_seq_arr = kmalloc_array(signal_seq_arr_len, - sizeof(*signal_seq_arr), - GFP_ATOMIC); - if (!signal_seq_arr) - signal_seq_arr = kmalloc_array(signal_seq_arr_len, - sizeof(*signal_seq_arr), - GFP_KERNEL); - if (!signal_seq_arr) { - atomic64_inc(&ctx->cs_counters.out_of_mem_drop_cnt); - atomic64_inc(&hdev->aggregated_cs_counters.out_of_mem_drop_cnt); - return -ENOMEM; - } - - size_to_copy = chunk->num_signal_seq_arr * sizeof(*signal_seq_arr); - if (copy_from_user(signal_seq_arr, - u64_to_user_ptr(chunk->signal_seq_arr), - size_to_copy)) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&hdev->aggregated_cs_counters.validation_drop_cnt); - dev_err(hdev->dev, - "Failed to copy signal seq array from user\n"); - rc = -EFAULT; - goto out; - } - - /* currently it is guaranteed to have only one signal seq */ - *signal_seq = signal_seq_arr[0]; - -out: - kfree(signal_seq_arr); - - return rc; -} - -static int cs_ioctl_signal_wait_create_jobs(struct hl_device *hdev, - struct hl_ctx *ctx, struct hl_cs *cs, enum hl_queue_type q_type, - u32 q_idx) -{ - struct hl_cs_counters_atomic *cntr; - struct hl_cs_job *job; - struct hl_cb *cb; - u32 cb_size; - - cntr = &hdev->aggregated_cs_counters; - - job = hl_cs_allocate_job(hdev, q_type, true); - if (!job) { - atomic64_inc(&ctx->cs_counters.out_of_mem_drop_cnt); - atomic64_inc(&cntr->out_of_mem_drop_cnt); - dev_err(hdev->dev, "Failed to allocate a new job\n"); - return -ENOMEM; - } - - if (cs->type == CS_TYPE_WAIT) - cb_size = hdev->asic_funcs->get_wait_cb_size(hdev); - else - cb_size = hdev->asic_funcs->get_signal_cb_size(hdev); - - cb = hl_cb_kernel_create(hdev, cb_size, - q_type == QUEUE_TYPE_HW && hdev->mmu_enable); - if (!cb) { - atomic64_inc(&ctx->cs_counters.out_of_mem_drop_cnt); - atomic64_inc(&cntr->out_of_mem_drop_cnt); - kfree(job); - return -EFAULT; - } - - job->id = 0; - job->cs = cs; - job->user_cb = cb; - atomic_inc(&job->user_cb->cs_cnt); - job->user_cb_size = cb_size; - job->hw_queue_id = q_idx; - - /* - * No need in parsing, user CB is the patched CB. - * We call hl_cb_destroy() out of two reasons - we don't need the CB in - * the CB idr anymore and to decrement its refcount as it was - * incremented inside hl_cb_kernel_create(). - */ - job->patched_cb = job->user_cb; - job->job_cb_size = job->user_cb_size; - hl_cb_destroy(hdev, &hdev->kernel_cb_mgr, cb->id << PAGE_SHIFT); - - /* increment refcount as for external queues we get completion */ - cs_get(cs); - - cs->jobs_in_queue_cnt[job->hw_queue_id]++; - - list_add_tail(&job->cs_node, &cs->job_list); - - hl_debugfs_add_job(hdev, job); - - return 0; -} - -static int cs_ioctl_signal_wait(struct hl_fpriv *hpriv, enum hl_cs_type cs_type, - void __user *chunks, u32 num_chunks, - u64 *cs_seq, u32 flags, u32 timeout) -{ - struct hl_cs_chunk *cs_chunk_array, *chunk; - struct hw_queue_properties *hw_queue_prop; - struct hl_device *hdev = hpriv->hdev; - struct hl_cs_compl *sig_waitcs_cmpl; - u32 q_idx, collective_engine_id = 0; - struct hl_cs_counters_atomic *cntr; - struct hl_fence *sig_fence = NULL; - struct hl_ctx *ctx = hpriv->ctx; - enum hl_queue_type q_type; - struct hl_cs *cs; - u64 signal_seq; - int rc; - - cntr = &hdev->aggregated_cs_counters; - *cs_seq = ULLONG_MAX; - - rc = hl_cs_copy_chunk_array(hdev, &cs_chunk_array, chunks, num_chunks, - ctx); - if (rc) - goto out; - - /* currently it is guaranteed to have only one chunk */ - chunk = &cs_chunk_array[0]; - - if (chunk->queue_index >= hdev->asic_prop.max_queues) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&cntr->validation_drop_cnt); - dev_err(hdev->dev, "Queue index %d is invalid\n", - chunk->queue_index); - rc = -EINVAL; - goto free_cs_chunk_array; - } - - q_idx = chunk->queue_index; - hw_queue_prop = &hdev->asic_prop.hw_queues_props[q_idx]; - q_type = hw_queue_prop->type; - - if (!hw_queue_prop->supports_sync_stream) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&cntr->validation_drop_cnt); - dev_err(hdev->dev, - "Queue index %d does not support sync stream operations\n", - q_idx); - rc = -EINVAL; - goto free_cs_chunk_array; - } - - if (cs_type == CS_TYPE_COLLECTIVE_WAIT) { - if (!(hw_queue_prop->collective_mode == HL_COLLECTIVE_MASTER)) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&cntr->validation_drop_cnt); - dev_err(hdev->dev, - "Queue index %d is invalid\n", q_idx); - rc = -EINVAL; - goto free_cs_chunk_array; - } - - collective_engine_id = chunk->collective_engine_id; - } - - if (cs_type == CS_TYPE_WAIT || cs_type == CS_TYPE_COLLECTIVE_WAIT) { - rc = cs_ioctl_extract_signal_seq(hdev, chunk, &signal_seq, ctx); - if (rc) - goto free_cs_chunk_array; - - sig_fence = hl_ctx_get_fence(ctx, signal_seq); - if (IS_ERR(sig_fence)) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&cntr->validation_drop_cnt); - dev_err(hdev->dev, - "Failed to get signal CS with seq 0x%llx\n", - signal_seq); - rc = PTR_ERR(sig_fence); - goto free_cs_chunk_array; - } - - if (!sig_fence) { - /* signal CS already finished */ - rc = 0; - goto free_cs_chunk_array; - } - - sig_waitcs_cmpl = - container_of(sig_fence, struct hl_cs_compl, base_fence); - - if (sig_waitcs_cmpl->type != CS_TYPE_SIGNAL) { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&cntr->validation_drop_cnt); - dev_err(hdev->dev, - "CS seq 0x%llx is not of a signal CS\n", - signal_seq); - hl_fence_put(sig_fence); - rc = -EINVAL; - goto free_cs_chunk_array; - } - - if (completion_done(&sig_fence->completion)) { - /* signal CS already finished */ - hl_fence_put(sig_fence); - rc = 0; - goto free_cs_chunk_array; - } - } - - rc = allocate_cs(hdev, ctx, cs_type, ULLONG_MAX, &cs, flags, timeout); - if (rc) { - if (cs_type == CS_TYPE_WAIT || - cs_type == CS_TYPE_COLLECTIVE_WAIT) - hl_fence_put(sig_fence); - goto free_cs_chunk_array; - } - - /* - * Save the signal CS fence for later initialization right before - * hanging the wait CS on the queue. - */ - if (cs_type == CS_TYPE_WAIT || cs_type == CS_TYPE_COLLECTIVE_WAIT) - cs->signal_fence = sig_fence; - - hl_debugfs_add_cs(cs); - - *cs_seq = cs->sequence; - - if (cs_type == CS_TYPE_WAIT || cs_type == CS_TYPE_SIGNAL) - rc = cs_ioctl_signal_wait_create_jobs(hdev, ctx, cs, q_type, - q_idx); - else if (cs_type == CS_TYPE_COLLECTIVE_WAIT) - rc = hdev->asic_funcs->collective_wait_create_jobs(hdev, ctx, - cs, q_idx, collective_engine_id); - else { - atomic64_inc(&ctx->cs_counters.validation_drop_cnt); - atomic64_inc(&cntr->validation_drop_cnt); - rc = -EINVAL; - } - - if (rc) - goto free_cs_object; - - rc = hl_hw_queue_schedule_cs(cs); - if (rc) { - if (rc != -EAGAIN) - dev_err(hdev->dev, - "Failed to submit CS %d.%llu to H/W queues, error %d\n", - ctx->asid, cs->sequence, rc); - goto free_cs_object; - } - - rc = HL_CS_STATUS_SUCCESS; - goto put_cs; - -free_cs_object: - cs_rollback(hdev, cs); - *cs_seq = ULLONG_MAX; - /* The path below is both for good and erroneous exits */ -put_cs: - /* We finished with the CS in this function, so put the ref */ - cs_put(cs); -free_cs_chunk_array: - kfree(cs_chunk_array); -out: - return rc; -} - -int hl_cs_ioctl(struct hl_fpriv *hpriv, void *data) -{ - union hl_cs_args *args = data; - enum hl_cs_type cs_type; - u64 cs_seq = ULONG_MAX; - void __user *chunks; - u32 num_chunks, flags, timeout; - int rc; - - rc = hl_cs_sanity_checks(hpriv, args); - if (rc) - goto out; - - rc = hl_cs_ctx_switch(hpriv, args, &cs_seq); - if (rc) - goto out; - - rc = hl_submit_pending_cb(hpriv); - if (rc) - goto out; - - cs_type = hl_cs_get_cs_type(args->in.cs_flags & - ~HL_CS_FLAGS_FORCE_RESTORE); - chunks = (void __user *) (uintptr_t) args->in.chunks_execute; - num_chunks = args->in.num_chunks_execute; - flags = args->in.cs_flags; - - /* In case this is a staged CS, user should supply the CS sequence */ - if ((flags & HL_CS_FLAGS_STAGED_SUBMISSION) && - !(flags & HL_CS_FLAGS_STAGED_SUBMISSION_FIRST)) - cs_seq = args->in.seq; - - timeout = flags & HL_CS_FLAGS_CUSTOM_TIMEOUT - ? msecs_to_jiffies(args->in.timeout * 1000) - : hpriv->hdev->timeout_jiffies; - - switch (cs_type) { - case CS_TYPE_SIGNAL: - case CS_TYPE_WAIT: - case CS_TYPE_COLLECTIVE_WAIT: - rc = cs_ioctl_signal_wait(hpriv, cs_type, chunks, num_chunks, - &cs_seq, args->in.cs_flags, timeout); - break; - default: - rc = cs_ioctl_default(hpriv, chunks, num_chunks, &cs_seq, - args->in.cs_flags, timeout); - break; - } - -out: - if (rc != -EAGAIN) { - memset(args, 0, sizeof(*args)); - args->out.status = rc; - args->out.seq = cs_seq; - } - - return rc; -} - -static int _hl_cs_wait_ioctl(struct hl_device *hdev, struct hl_ctx *ctx, - u64 timeout_us, u64 seq, - enum hl_cs_wait_status *status, s64 *timestamp) -{ - struct hl_fence *fence; - unsigned long timeout; - int rc = 0; - long completion_rc; - - if (timestamp) - *timestamp = 0; - - if (timeout_us == MAX_SCHEDULE_TIMEOUT) - timeout = timeout_us; - else - timeout = usecs_to_jiffies(timeout_us); - - hl_ctx_get(hdev, ctx); - - fence = hl_ctx_get_fence(ctx, seq); - if (IS_ERR(fence)) { - rc = PTR_ERR(fence); - if (rc == -EINVAL) - dev_notice_ratelimited(hdev->dev, - "Can't wait on CS %llu because current CS is at seq %llu\n", - seq, ctx->cs_sequence); - } else if (fence) { - if (!timeout_us) - completion_rc = completion_done(&fence->completion); - else - completion_rc = - wait_for_completion_interruptible_timeout( - &fence->completion, timeout); - - if (completion_rc > 0) { - *status = CS_WAIT_STATUS_COMPLETED; - if (timestamp) - *timestamp = ktime_to_ns(fence->timestamp); - } else { - *status = CS_WAIT_STATUS_BUSY; - } - - if (fence->error == -ETIMEDOUT) - rc = -ETIMEDOUT; - else if (fence->error == -EIO) - rc = -EIO; - - hl_fence_put(fence); - } else { - dev_dbg(hdev->dev, - "Can't wait on seq %llu because current CS is at seq %llu (Fence is gone)\n", - seq, ctx->cs_sequence); - *status = CS_WAIT_STATUS_GONE; - } - - hl_ctx_put(ctx); - - return rc; -} - -static int hl_cs_wait_ioctl(struct hl_fpriv *hpriv, void *data) -{ - struct hl_device *hdev = hpriv->hdev; - union hl_wait_cs_args *args = data; - enum hl_cs_wait_status status; - u64 seq = args->in.seq; - s64 timestamp; - int rc; - - rc = _hl_cs_wait_ioctl(hdev, hpriv->ctx, args->in.timeout_us, seq, - &status, ×tamp); - - memset(args, 0, sizeof(*args)); - - if (rc) { - if (rc == -ERESTARTSYS) { - dev_err_ratelimited(hdev->dev, - "user process got signal while waiting for CS handle %llu\n", - seq); - args->out.status = HL_WAIT_CS_STATUS_INTERRUPTED; - rc = -EINTR; - } else if (rc == -ETIMEDOUT) { - dev_err_ratelimited(hdev->dev, - "CS %llu has timed-out while user process is waiting for it\n", - seq); - args->out.status = HL_WAIT_CS_STATUS_TIMEDOUT; - } else if (rc == -EIO) { - dev_err_ratelimited(hdev->dev, - "CS %llu has been aborted while user process is waiting for it\n", - seq); - args->out.status = HL_WAIT_CS_STATUS_ABORTED; - } - return rc; - } - - if (timestamp) { - args->out.flags |= HL_WAIT_CS_STATUS_FLAG_TIMESTAMP_VLD; - args->out.timestamp_nsec = timestamp; - } - - switch (status) { - case CS_WAIT_STATUS_GONE: - args->out.flags |= HL_WAIT_CS_STATUS_FLAG_GONE; - fallthrough; - case CS_WAIT_STATUS_COMPLETED: - args->out.status = HL_WAIT_CS_STATUS_COMPLETED; - break; - case CS_WAIT_STATUS_BUSY: - default: - args->out.status = HL_WAIT_CS_STATUS_BUSY; - break; - } - - return 0; -} - -static int _hl_interrupt_wait_ioctl(struct hl_device *hdev, struct hl_ctx *ctx, - u32 timeout_us, u64 user_address, - u32 target_value, u16 interrupt_offset, - enum hl_cs_wait_status *status) -{ - struct hl_user_pending_interrupt *pend; - struct hl_user_interrupt *interrupt; - unsigned long timeout; - long completion_rc; - u32 completion_value; - int rc = 0; - - if (timeout_us == U32_MAX) - timeout = timeout_us; - else - timeout = usecs_to_jiffies(timeout_us); - - hl_ctx_get(hdev, ctx); - - pend = kmalloc(sizeof(*pend), GFP_KERNEL); - if (!pend) { - hl_ctx_put(ctx); - return -ENOMEM; - } - - hl_fence_init(&pend->fence, ULONG_MAX); - - if (interrupt_offset == HL_COMMON_USER_INTERRUPT_ID) - interrupt = &hdev->common_user_interrupt; - else - interrupt = &hdev->user_interrupt[interrupt_offset]; - - spin_lock(&interrupt->wait_list_lock); - if (!hl_device_operational(hdev, NULL)) { - rc = -EPERM; - goto unlock_and_free_fence; - } - - if (copy_from_user(&completion_value, u64_to_user_ptr(user_address), 4)) { - dev_err(hdev->dev, - "Failed to copy completion value from user\n"); - rc = -EFAULT; - goto unlock_and_free_fence; - } - - if (completion_value >= target_value) - *status = CS_WAIT_STATUS_COMPLETED; - else - *status = CS_WAIT_STATUS_BUSY; - - if (!timeout_us || (*status == CS_WAIT_STATUS_COMPLETED)) - goto unlock_and_free_fence; - - /* Add pending user interrupt to relevant list for the interrupt - * handler to monitor - */ - list_add_tail(&pend->wait_list_node, &interrupt->wait_list_head); - spin_unlock(&interrupt->wait_list_lock); - -wait_again: - /* Wait for interrupt handler to signal completion */ - completion_rc = - wait_for_completion_interruptible_timeout( - &pend->fence.completion, timeout); - - /* If timeout did not expire we need to perform the comparison. - * If comparison fails, keep waiting until timeout expires - */ - if (completion_rc > 0) { - if (copy_from_user(&completion_value, - u64_to_user_ptr(user_address), 4)) { - dev_err(hdev->dev, - "Failed to copy completion value from user\n"); - rc = -EFAULT; - goto remove_pending_user_interrupt; - } - - if (completion_value >= target_value) { - *status = CS_WAIT_STATUS_COMPLETED; - } else { - timeout = completion_rc; - goto wait_again; - } - } else { - *status = CS_WAIT_STATUS_BUSY; - } - -remove_pending_user_interrupt: - spin_lock(&interrupt->wait_list_lock); - list_del(&pend->wait_list_node); - -unlock_and_free_fence: - spin_unlock(&interrupt->wait_list_lock); - kfree(pend); - hl_ctx_put(ctx); - - return rc; -} - -static int hl_interrupt_wait_ioctl(struct hl_fpriv *hpriv, void *data) -{ - u16 interrupt_id, interrupt_offset, first_interrupt, last_interrupt; - struct hl_device *hdev = hpriv->hdev; - struct asic_fixed_properties *prop; - union hl_wait_cs_args *args = data; - enum hl_cs_wait_status status; - int rc; - - prop = &hdev->asic_prop; - - if (!prop->user_interrupt_count) { - dev_err(hdev->dev, "no user interrupts allowed"); - return -EPERM; - } - - interrupt_id = - FIELD_GET(HL_WAIT_CS_FLAGS_INTERRUPT_MASK, args->in.flags); - - first_interrupt = prop->first_available_user_msix_interrupt; - last_interrupt = prop->first_available_user_msix_interrupt + - prop->user_interrupt_count - 1; - - if ((interrupt_id < first_interrupt || interrupt_id > last_interrupt) && - interrupt_id != HL_COMMON_USER_INTERRUPT_ID) { - dev_err(hdev->dev, "invalid user interrupt %u", interrupt_id); - return -EINVAL; - } - - if (interrupt_id == HL_COMMON_USER_INTERRUPT_ID) - interrupt_offset = HL_COMMON_USER_INTERRUPT_ID; - else - interrupt_offset = interrupt_id - first_interrupt; - - rc = _hl_interrupt_wait_ioctl(hdev, hpriv->ctx, - args->in.interrupt_timeout_us, args->in.addr, - args->in.target, interrupt_offset, &status); - - memset(args, 0, sizeof(*args)); - - if (rc) { - dev_err_ratelimited(hdev->dev, - "interrupt_wait_ioctl failed (%d)\n", rc); - - return rc; - } - - switch (status) { - case CS_WAIT_STATUS_COMPLETED: - args->out.status = HL_WAIT_CS_STATUS_COMPLETED; - break; - case CS_WAIT_STATUS_BUSY: - default: - args->out.status = HL_WAIT_CS_STATUS_BUSY; - break; - } - - return 0; -} - -int hl_wait_ioctl(struct hl_fpriv *hpriv, void *data) -{ - union hl_wait_cs_args *args = data; - u32 flags = args->in.flags; - int rc; - - if (flags & HL_WAIT_CS_FLAGS_INTERRUPT) - rc = hl_interrupt_wait_ioctl(hpriv, data); - else - rc = hl_cs_wait_ioctl(hpriv, data); - - return rc; -} |