1 files changed, 51 insertions, 20 deletions

diff --git a/drivers/misc/habanalabs/common/command_submission.c b/drivers/misc/habanalabs/common/command_submission.c
index 7b0516cf808b..91b57544f7c6 100644
--- a/drivers/misc/habanalabs/common/command_submission.c
+++ b/drivers/misc/habanalabs/common/command_submission.c
@@ -405,7 +405,7 @@ static void staged_cs_put(struct hl_device *hdev, struct hl_cs *cs)
 static void cs_handle_tdr(struct hl_device *hdev, struct hl_cs *cs)
 {
 	bool next_entry_found = false;
-	struct hl_cs *next;
+	struct hl_cs *next, *first_cs;
 
 	if (!cs_needs_timeout(cs))
 		return;
@@ -415,9 +415,16 @@ static void cs_handle_tdr(struct hl_device *hdev, struct hl_cs *cs)
 	/* 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'.
+	 * In case single staged cs was submitted which has both first and last
+	 * indications, then "cs_find_first" below will return NULL, since we
+	 * removed the cs node from the list before getting here,
+	 * in such cases just continue with the cs to cancel it's TDR work.
 	 */
-	if (cs->staged_cs && cs->staged_last)
-		cs = hl_staged_cs_find_first(hdev, cs->staged_sequence);
+	if (cs->staged_cs && cs->staged_last) {
+		first_cs = hl_staged_cs_find_first(hdev, cs->staged_sequence);
+		if (first_cs)
+			cs = first_cs;
+	}
 
 	spin_unlock(&hdev->cs_mirror_lock);
 
@@ -1288,6 +1295,12 @@ static int cs_ioctl_default(struct hl_fpriv *hpriv, void __user *chunks,
 	if (rc)
 		goto free_cs_object;
 
+	/* If this is a staged submission we must return the staged sequence
+	 * rather than the internal CS sequence
+	 */
+	if (cs->staged_cs)
+		*cs_seq = cs->staged_sequence;
+
 	/* 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];
@@ -1988,6 +2001,15 @@ static int cs_ioctl_signal_wait(struct hl_fpriv *hpriv, enum hl_cs_type cs_type,
 			goto free_cs_chunk_array;
 		}
 
+		if (!hdev->nic_ports_mask) {
+			atomic64_inc(&ctx->cs_counters.validation_drop_cnt);
+			atomic64_inc(&cntr->validation_drop_cnt);
+			dev_err(hdev->dev,
+				"Collective operations not supported when NIC ports are disabled");
+			rc = -EINVAL;
+			goto free_cs_chunk_array;
+		}
+
 		collective_engine_id = chunk->collective_engine_id;
 	}
 
@@ -2026,9 +2048,10 @@ static int cs_ioctl_signal_wait(struct hl_fpriv *hpriv, enum hl_cs_type cs_type,
 			spin_unlock(&ctx->sig_mgr.lock);
 
 			if (!handle_found) {
-				dev_err(hdev->dev, "Cannot find encapsulated signals handle for seq 0x%llx\n",
+				/* treat as signal CS already finished */
+				dev_dbg(hdev->dev, "Cannot find encapsulated signals handle for seq 0x%llx\n",
 						signal_seq);
-				rc = -EINVAL;
+				rc = 0;
 				goto free_cs_chunk_array;
 			}
 
@@ -2613,7 +2636,8 @@ static int hl_multi_cs_wait_ioctl(struct hl_fpriv *hpriv, void *data)
 		 * completed after the poll function.
 		 */
 		if (!mcs_data.completion_bitmap) {
-			dev_err(hdev->dev, "Multi-CS got completion on wait but no CS completed\n");
+			dev_warn_ratelimited(hdev->dev,
+				"Multi-CS got completion on wait but no CS completed\n");
 			rc = -EFAULT;
 		}
 	}
@@ -2740,10 +2764,20 @@ static int _hl_interrupt_wait_ioctl(struct hl_device *hdev, struct hl_ctx *ctx,
 	else
 		interrupt = &hdev->user_interrupt[interrupt_offset];
 
+	/* Add pending user interrupt to relevant list for the interrupt
+	 * handler to monitor
+	 */
+	spin_lock_irqsave(&interrupt->wait_list_lock, flags);
+	list_add_tail(&pend->wait_list_node, &interrupt->wait_list_head);
+	spin_unlock_irqrestore(&interrupt->wait_list_lock, flags);
+
+	/* We check for completion value as interrupt could have been received
+	 * before we added the node to the wait list
+	 */
 	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 free_fence;
+		goto remove_pending_user_interrupt;
 	}
 
 	if (completion_value >= target_value)
@@ -2752,14 +2786,7 @@ static int _hl_interrupt_wait_ioctl(struct hl_device *hdev, struct hl_ctx *ctx,
 		*status = CS_WAIT_STATUS_BUSY;
 
 	if (!timeout_us || (*status == CS_WAIT_STATUS_COMPLETED))
-		goto free_fence;
-
-	/* Add pending user interrupt to relevant list for the interrupt
-	 * handler to monitor
-	 */
-	spin_lock_irqsave(&interrupt->wait_list_lock, flags);
-	list_add_tail(&pend->wait_list_node, &interrupt->wait_list_head);
-	spin_unlock_irqrestore(&interrupt->wait_list_lock, flags);
+		goto remove_pending_user_interrupt;
 
 wait_again:
 	/* Wait for interrupt handler to signal completion */
@@ -2770,6 +2797,15 @@ wait_again:
 	 * If comparison fails, keep waiting until timeout expires
 	 */
 	if (completion_rc > 0) {
+		spin_lock_irqsave(&interrupt->wait_list_lock, flags);
+		/* reinit_completion must be called before we check for user
+		 * completion value, otherwise, if interrupt is received after
+		 * the comparison and before the next wait_for_completion,
+		 * we will reach timeout and fail
+		 */
+		reinit_completion(&pend->fence.completion);
+		spin_unlock_irqrestore(&interrupt->wait_list_lock, flags);
+
 		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;
@@ -2780,11 +2816,7 @@ wait_again:
 		if (completion_value >= target_value) {
 			*status = CS_WAIT_STATUS_COMPLETED;
 		} else {
-			spin_lock_irqsave(&interrupt->wait_list_lock, flags);
-			reinit_completion(&pend->fence.completion);
 			timeout = completion_rc;
-
-			spin_unlock_irqrestore(&interrupt->wait_list_lock, flags);
 			goto wait_again;
 		}
 	} else if (completion_rc == -ERESTARTSYS) {
@@ -2802,7 +2834,6 @@ remove_pending_user_interrupt:
 	list_del(&pend->wait_list_node);
 	spin_unlock_irqrestore(&interrupt->wait_list_lock, flags);
 
-free_fence:
 	kfree(pend);
 	hl_ctx_put(ctx);