}
}
+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 job_wq_completion(struct work_struct *work)
{
struct hl_cs_job *job = container_of(work, struct hl_cs_job,
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, &cs);
+ 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)
{
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;
};
/**
+ * struct hl_pending_cb - pending command buffer structure
+ * @cb_node: cb node in pending cb list
+ * @cb: command buffer to send in next submission
+ * @cb_size: command buffer size
+ * @hw_queue_id: destination queue id
+ */
+struct hl_pending_cb {
+ struct list_head cb_node;
+ struct hl_cb *cb;
+ u32 cb_size;
+ u32 hw_queue_id;
+};
+
+/**
* struct hl_ctx - user/kernel context.
* @mem_hash: holds mapping from virtual address to virtual memory area
* descriptor (hl_vm_phys_pg_list or hl_userptr).
* @mmu_lock: protects the MMU page tables. Any change to the PGT, modifying the
* MMU hash or walking the PGT requires talking this lock.
* @debugfs_list: node in debugfs list of contexts.
+ * pending_cb_list: list of pending command buffers waiting to be sent upon
+ * next user command submission context.
* @cs_counters: context command submission counters.
* @cb_va_pool: device VA pool for command buffers which are mapped to the
* device's MMU.
* index to cs_pending array.
* @dram_default_hops: array that holds all hops addresses needed for default
* DRAM mapping.
+ * @pending_cb_lock: spinlock to protect pending cb list
* @cs_lock: spinlock to protect cs_sequence.
* @dram_phys_mem: amount of used physical DRAM memory by this context.
* @thread_ctx_switch_token: token to prevent multiple threads of the same
* context from running the context switch phase.
* Only a single thread should run it.
+ * @thread_pending_cb_token: token to prevent multiple threads from processing
+ * the pending CB list. Only a single thread should
+ * process the list since it is protected by a
+ * spinlock and we don't want to halt the entire
+ * command submission sequence.
* @thread_ctx_switch_wait_token: token to prevent the threads that didn't run
* the context switch phase from moving to their
* execution phase before the context switch phase
struct mutex mem_hash_lock;
struct mutex mmu_lock;
struct list_head debugfs_list;
+ struct list_head pending_cb_list;
struct hl_cs_counters_atomic cs_counters;
struct gen_pool *cb_va_pool;
u64 cs_sequence;
u64 *dram_default_hops;
+ spinlock_t pending_cb_lock;
spinlock_t cs_lock;
atomic64_t dram_phys_mem;
atomic_t thread_ctx_switch_token;
+ atomic_t thread_pending_cb_token;
u32 thread_ctx_switch_wait_token;
u32 asid;
u32 handle;
void hl_cb_va_pool_fini(struct hl_ctx *ctx);
void hl_cs_rollback_all(struct hl_device *hdev);
+void hl_pending_cb_list_flush(struct hl_ctx *ctx);
struct hl_cs_job *hl_cs_allocate_job(struct hl_device *hdev,
enum hl_queue_type queue_type, bool is_kernel_allocated_cb);
void hl_sob_reset_error(struct kref *ref);
projects / platform / kernel / linux-starfive.git / commitdiff