V4L/DVB (11615): cx18: Rename the work queue to "in_work_queue"

Rename the work queue to "in_work_queue" to indicate it is handling
incoming mailbox commands.  This is preparation for adding a work queue
for handling deferrable outgoing mailbox commands.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx18/cx18-driver.c

@@ -562,16 +562,18 @@ static int __devinit cx18_init_struct1(struct cx18 *cx)
 	mutex_init(&cx->epu2apu_mb_lock);
 	mutex_init(&cx->epu2cpu_mb_lock);
 
-	cx->work_queue = create_singlethread_workqueue(cx->v4l2_dev.name);
-	if (cx->work_queue == NULL) {
-		CX18_ERR("Unable to create work hander thread\n");
+	snprintf(cx->in_workq_name, sizeof(cx->in_workq_name), "%s-in",
+		 cx->v4l2_dev.name);
+	cx->in_work_queue = create_singlethread_workqueue(cx->in_workq_name);
+	if (cx->in_work_queue == NULL) {
+		CX18_ERR("Unable to create incoming mailbox handler thread\n");
 		return -ENOMEM;
 	}
 
-	for (i = 0; i < CX18_MAX_EPU_WORK_ORDERS; i++) {
-		cx->epu_work_order[i].cx = cx;
-		cx->epu_work_order[i].str = cx->epu_debug_str;
-		INIT_WORK(&cx->epu_work_order[i].work, cx18_epu_work_handler);
+	for (i = 0; i < CX18_MAX_IN_WORK_ORDERS; i++) {
+		cx->in_work_order[i].cx = cx;
+		cx->in_work_order[i].str = cx->epu_debug_str;
+		INIT_WORK(&cx->in_work_order[i].work, cx18_in_work_handler);
 	}
 
 	/* start counting open_id at 1 */
@@ -944,7 +946,7 @@ free_map:
 free_mem:
 	release_mem_region(cx->base_addr, CX18_MEM_SIZE);
 free_workqueue:
-	destroy_workqueue(cx->work_queue);
+	destroy_workqueue(cx->in_work_queue);
 err:
 	if (retval == 0)
 		retval = -ENODEV;
@@ -1053,11 +1055,11 @@ int cx18_init_on_first_open(struct cx18 *cx)
 	return 0;
 }
 
-static void cx18_cancel_epu_work_orders(struct cx18 *cx)
+static void cx18_cancel_in_work_orders(struct cx18 *cx)
 {
 	int i;
-	for (i = 0; i < CX18_MAX_EPU_WORK_ORDERS; i++)
-		cancel_work_sync(&cx->epu_work_order[i].work);
+	for (i = 0; i < CX18_MAX_IN_WORK_ORDERS; i++)
+		cancel_work_sync(&cx->in_work_order[i].work);
 }
 
 static void cx18_remove(struct pci_dev *pci_dev)
@@ -1079,9 +1081,9 @@ static void cx18_remove(struct pci_dev *pci_dev)
 
 	cx18_halt_firmware(cx);
 
-	cx18_cancel_epu_work_orders(cx);
+	cx18_cancel_in_work_orders(cx);
 
-	destroy_workqueue(cx->work_queue);
+	destroy_workqueue(cx->in_work_queue);
 
 	cx18_streams_cleanup(cx, 1);
 

drivers/media/video/cx18/cx18-driver.h

@@ -305,7 +305,7 @@ struct cx18_scb; /* forward reference */
 
 
 #define CX18_MAX_MDL_ACKS 2
-#define CX18_MAX_EPU_WORK_ORDERS (CX18_MAX_FW_MDLS_PER_STREAM + 7)
+#define CX18_MAX_IN_WORK_ORDERS (CX18_MAX_FW_MDLS_PER_STREAM + 7)
 /* CPU_DE_RELEASE_MDL can burst CX18_MAX_FW_MDLS_PER_STREAM orders in a group */
 
 #define CX18_F_EWO_MB_STALE_UPON_RECEIPT 0x1
@@ -313,7 +313,7 @@ struct cx18_scb; /* forward reference */
 #define CX18_F_EWO_MB_STALE \
 	     (CX18_F_EWO_MB_STALE_UPON_RECEIPT | CX18_F_EWO_MB_STALE_WHILE_PROC)
 
-struct cx18_epu_work_order {
+struct cx18_in_work_order {
 	struct work_struct work;
 	atomic_t pending;
 	struct cx18 *cx;
@@ -568,8 +568,9 @@ struct cx18 {
 	u32 sw2_irq_mask;
 	u32 hw2_irq_mask;
 
-	struct workqueue_struct *work_queue;
-	struct cx18_epu_work_order epu_work_order[CX18_MAX_EPU_WORK_ORDERS];
+	struct workqueue_struct *in_work_queue;
+	char in_workq_name[11]; /* "cx18-NN-in" */
+	struct cx18_in_work_order in_work_order[CX18_MAX_IN_WORK_ORDERS];
 	char epu_debug_str[256]; /* CX18_EPU_DEBUG is rare: use shared space */
 
 	/* i2c */

drivers/media/video/cx18/cx18-mailbox.c

@@ -131,7 +131,7 @@ static void dump_mb(struct cx18 *cx, struct cx18_mailbox *mb, char *name)
  * Functions that run in a work_queue work handling context
  */
 
-static void epu_dma_done(struct cx18 *cx, struct cx18_epu_work_order *order)
+static void epu_dma_done(struct cx18 *cx, struct cx18_in_work_order *order)
 {
 	u32 handle, mdl_ack_count, id;
 	struct cx18_mailbox *mb;
@@ -213,7 +213,7 @@ static void epu_dma_done(struct cx18 *cx, struct cx18_epu_work_order *order)
 		wake_up(&s->waitq);
 }
 
-static void epu_debug(struct cx18 *cx, struct cx18_epu_work_order *order)
+static void epu_debug(struct cx18 *cx, struct cx18_in_work_order *order)
 {
 	char *p;
 	char *str = order->str;
@@ -224,7 +224,7 @@ static void epu_debug(struct cx18 *cx, struct cx18_epu_work_order *order)
 		CX18_INFO("FW version: %s\n", p - 1);
 }
 
-static void epu_cmd(struct cx18 *cx, struct cx18_epu_work_order *order)
+static void epu_cmd(struct cx18 *cx, struct cx18_in_work_order *order)
 {
 	switch (order->rpu) {
 	case CPU:
@@ -253,18 +253,18 @@ static void epu_cmd(struct cx18 *cx, struct cx18_epu_work_order *order)
 }
 
 static
-void free_epu_work_order(struct cx18 *cx, struct cx18_epu_work_order *order)
+void free_in_work_order(struct cx18 *cx, struct cx18_in_work_order *order)
 {
 	atomic_set(&order->pending, 0);
 }
 
-void cx18_epu_work_handler(struct work_struct *work)
+void cx18_in_work_handler(struct work_struct *work)
 {
-	struct cx18_epu_work_order *order =
-			container_of(work, struct cx18_epu_work_order, work);
+	struct cx18_in_work_order *order =
+			container_of(work, struct cx18_in_work_order, work);
 	struct cx18 *cx = order->cx;
 	epu_cmd(cx, order);
-	free_epu_work_order(cx, order);
+	free_in_work_order(cx, order);
 }
 
 
@@ -272,7 +272,7 @@ void cx18_epu_work_handler(struct work_struct *work)
  * Functions that run in an interrupt handling context
  */
 
-static void mb_ack_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
+static void mb_ack_irq(struct cx18 *cx, struct cx18_in_work_order *order)
 {
 	struct cx18_mailbox __iomem *ack_mb;
 	u32 ack_irq, req;
@@ -308,7 +308,7 @@ static void mb_ack_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
 	return;
 }
 
-static int epu_dma_done_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
+static int epu_dma_done_irq(struct cx18 *cx, struct cx18_in_work_order *order)
 {
 	u32 handle, mdl_ack_offset, mdl_ack_count;
 	struct cx18_mailbox *mb;
@@ -334,7 +334,7 @@ static int epu_dma_done_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
 }
 
 static
-int epu_debug_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
+int epu_debug_irq(struct cx18 *cx, struct cx18_in_work_order *order)
 {
 	u32 str_offset;
 	char *str = order->str;
@@ -355,7 +355,7 @@ int epu_debug_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
 }
 
 static inline
-int epu_cmd_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
+int epu_cmd_irq(struct cx18 *cx, struct cx18_in_work_order *order)
 {
 	int ret = -1;
 
@@ -387,12 +387,12 @@ int epu_cmd_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
 }
 
 static inline
-struct cx18_epu_work_order *alloc_epu_work_order_irq(struct cx18 *cx)
+struct cx18_in_work_order *alloc_in_work_order_irq(struct cx18 *cx)
 {
 	int i;
-	struct cx18_epu_work_order *order = NULL;
+	struct cx18_in_work_order *order = NULL;
 
-	for (i = 0; i < CX18_MAX_EPU_WORK_ORDERS; i++) {
+	for (i = 0; i < CX18_MAX_IN_WORK_ORDERS; i++) {
 		/*
 		 * We only need "pending" atomic to inspect its contents,
 		 * and need not do a check and set because:
@@ -401,8 +401,8 @@ struct cx18_epu_work_order *alloc_epu_work_order_irq(struct cx18 *cx)
 		 * 2. "pending" is only set here, and we're serialized because
 		 * we're called in an IRQ handler context.
 		 */
-		if (atomic_read(&cx->epu_work_order[i].pending) == 0) {
-			order = &cx->epu_work_order[i];
+		if (atomic_read(&cx->in_work_order[i].pending) == 0) {
+			order = &cx->in_work_order[i];
 			atomic_set(&order->pending, 1);
 			break;
 		}
@@ -414,7 +414,7 @@ void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu)
 {
 	struct cx18_mailbox __iomem *mb;
 	struct cx18_mailbox *order_mb;
-	struct cx18_epu_work_order *order;
+	struct cx18_in_work_order *order;
 	int submit;
 
 	switch (rpu) {
@@ -428,7 +428,7 @@ void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu)
 		return;
 	}
 
-	order = alloc_epu_work_order_irq(cx);
+	order = alloc_in_work_order_irq(cx);
 	if (order == NULL) {
 		CX18_WARN("Unable to find blank work order form to schedule "
 			  "incoming mailbox command processing\n");
@@ -461,7 +461,7 @@ void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu)
 	 */
 	submit = epu_cmd_irq(cx, order);
 	if (submit > 0) {
-		queue_work(cx->work_queue, &order->work);
+		queue_work(cx->in_work_queue, &order->work);
 	}
 }
 

drivers/media/video/cx18/cx18-mailbox.h

@@ -95,6 +95,6 @@ int cx18_api_func(void *priv, u32 cmd, int in, int out,
 
 void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu);
 
-void cx18_epu_work_handler(struct work_struct *work);
+void cx18_in_work_handler(struct work_struct *work);
 
 #endif