habanalabs: naming refactor of user interrupt flow

Current naming convention can be misleading. Hence renaming some
variables and defines in order to be more explicit.
Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

drivers/misc/habanalabs/common/command_submission.c

@@ -1080,7 +1080,7 @@ void hl_release_pending_user_interrupts(struct hl_device *hdev)
 		wake_pending_user_interrupt_threads(interrupt);
 	}
 
-	interrupt = &hdev->common_user_interrupt;
+	interrupt = &hdev->common_user_cq_interrupt;
 	wake_pending_user_interrupt_threads(interrupt);
 }
 
@@ -3373,8 +3373,8 @@ static int hl_interrupt_wait_ioctl(struct hl_fpriv *hpriv, void *data)
 		int_idx = interrupt_id - first_interrupt + prop->user_dec_intr_count;
 		interrupt = &hdev->user_interrupt[int_idx];
 
-	} else if (interrupt_id == HL_COMMON_USER_INTERRUPT_ID) {
-		interrupt = &hdev->common_user_interrupt;
+	} else if (interrupt_id == HL_COMMON_USER_CQ_INTERRUPT_ID) {
+		interrupt = &hdev->common_user_cq_interrupt;
 	} else {
 		dev_err(hdev->dev, "invalid user interrupt %u", interrupt_id);
 		return -EINVAL;

drivers/misc/habanalabs/common/habanalabs.h

@@ -76,7 +76,7 @@ struct hl_fpriv;
 
 #define HL_INVALID_QUEUE		UINT_MAX
 
-#define HL_COMMON_USER_INTERRUPT_ID	0xFFF
+#define HL_COMMON_USER_CQ_INTERRUPT_ID	0xFFF
 
 #define HL_STATE_DUMP_HIST_LEN		5
 
@@ -2952,8 +2952,8 @@ struct hl_reset_info {
  * @user_interrupt: array of hl_user_interrupt. upon the corresponding user
  *                  interrupt, driver will monitor the list of fences
  *                  registered to this interrupt.
- * @common_user_interrupt: common user interrupt for all user interrupts.
- *                         upon any user interrupt, driver will monitor the
+ * @common_user_cq_interrupt: common user CQ interrupt for all user CQ interrupts.
+ *                         upon any user CQ interrupt, driver will monitor the
  *                         list of fences registered to this common structure.
  * @shadow_cs_queue: pointer to a shadow queue that holds pointers to
  *                   outstanding command submissions.
@@ -3118,7 +3118,7 @@ struct hl_device {
 	enum hl_asic_type		asic_type;
 	struct hl_cq			*completion_queue;
 	struct hl_user_interrupt	*user_interrupt;
-	struct hl_user_interrupt	common_user_interrupt;
+	struct hl_user_interrupt	common_user_cq_interrupt;
 	struct hl_cs			**shadow_cs_queue;
 	struct workqueue_struct		**cq_wq;
 	struct workqueue_struct		*eq_wq;

drivers/misc/habanalabs/common/irq.c

@@ -269,7 +269,7 @@ static int handle_registration_node(struct hl_device *hdev, struct hl_user_pendi
 	return 0;
 }
 
-static void handle_user_cq(struct hl_device *hdev, struct hl_user_interrupt *user_cq)
+static void handle_user_interrupt(struct hl_device *hdev, struct hl_user_interrupt *intr)
 {
 	struct hl_user_pending_interrupt *pend, *temp_pend;
 	struct list_head *ts_reg_free_list_head = NULL;
@@ -291,8 +291,8 @@ static void handle_user_cq(struct hl_device *hdev, struct hl_user_interrupt *use
 	if (!job)
 		return;
 
-	spin_lock(&user_cq->wait_list_lock);
-	list_for_each_entry_safe(pend, temp_pend, &user_cq->wait_list_head, wait_list_node) {
+	spin_lock(&intr->wait_list_lock);
+	list_for_each_entry_safe(pend, temp_pend, &intr->wait_list_head, wait_list_node) {
 		if ((pend->cq_kernel_addr && *(pend->cq_kernel_addr) >= pend->cq_target_value) ||
 				!pend->cq_kernel_addr) {
 			if (pend->ts_reg_info.buf) {
@@ -309,7 +309,7 @@ static void handle_user_cq(struct hl_device *hdev, struct hl_user_interrupt *use
 			}
 		}
 	}
-	spin_unlock(&user_cq->wait_list_lock);
+	spin_unlock(&intr->wait_list_lock);
 
 	if (ts_reg_free_list_head) {
 		INIT_WORK(&job->free_obj, hl_ts_free_objects);
@@ -339,10 +339,10 @@ irqreturn_t hl_irq_handler_user_interrupt(int irq, void *arg)
 	 */
 	if (!user_int->is_decoder)
 		/* Handle user cq interrupts registered on all interrupts */
-		handle_user_cq(hdev, &hdev->common_user_interrupt);
+		handle_user_interrupt(hdev, &hdev->common_user_cq_interrupt);
 
 	/* Handle user cq or decoder interrupts registered on this specific irq */
-	handle_user_cq(hdev, user_int);
+	handle_user_interrupt(hdev, user_int);
 
 	return IRQ_HANDLED;
 }

drivers/misc/habanalabs/gaudi2/gaudi2.c

@@ -2891,9 +2891,9 @@ static void gaudi2_user_interrupt_setup(struct hl_device *hdev)
 	struct asic_fixed_properties *prop = &hdev->asic_prop;
 	int i, j, k;
 
-	/* Initialize common user interrupt */
-	HL_USR_INTR_STRUCT_INIT(hdev->common_user_interrupt, hdev, HL_COMMON_USER_INTERRUPT_ID,
-				false);
+	/* Initialize common user CQ interrupt */
+	HL_USR_INTR_STRUCT_INIT(hdev->common_user_cq_interrupt, hdev,
+				HL_COMMON_USER_CQ_INTERRUPT_ID, false);
 
 	/* User interrupts structure holds both decoder and user interrupts from various engines.
 	 * We first initialize the decoder interrupts and then we add the user interrupts.

include/uapi/misc/habanalabs.h

@@ -1442,6 +1442,7 @@ union hl_cs_args {
 
 #define HL_WAIT_CS_FLAGS_INTERRUPT		0x2
 #define HL_WAIT_CS_FLAGS_INTERRUPT_MASK		0xFFF00000
+#define HL_WAIT_CS_FLAGS_ANY_CQ_INTERRUPT	0xFFF00000
 #define HL_WAIT_CS_FLAGS_MULTI_CS		0x4
 #define HL_WAIT_CS_FLAGS_INTERRUPT_KERNEL_CQ	0x10
 #define HL_WAIT_CS_FLAGS_REGISTER_INTERRUPT	0x20
@@ -1491,8 +1492,10 @@ struct hl_wait_cs_in {
 
 	/* HL_WAIT_CS_FLAGS_*
 	 * If HL_WAIT_CS_FLAGS_INTERRUPT is set, this field should include
-	 * interrupt id according to HL_WAIT_CS_FLAGS_INTERRUPT_MASK, in order
-	 * not to specify an interrupt id ,set mask to all 1s.
+	 * interrupt id according to HL_WAIT_CS_FLAGS_INTERRUPT_MASK
+	 *
+	 * in order to wait for any CQ interrupt, set interrupt value to
+	 * HL_WAIT_CS_FLAGS_ANY_CQ_INTERRUPT.
 	 */
 	__u32 flags;