[media] saa7164: irqhandler cleanup and helper function added

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 80 insertions, 176 deletions

diff --git a/drivers/media/video/saa7164/saa7164-core.c b/drivers/media/video/saa7164/saa7164-core.c
index 09f7a64f538b..eb9c3459bb10 100644
--- a/drivers/media/video/saa7164/saa7164-core.c
+++ b/drivers/media/video/saa7164/saa7164-core.c
@@ -239,54 +239,15 @@ static void saa7164_histogram_print(struct saa7164_port *port,
 	printk(KERN_ERR "Total: %d\n", entries);
 }
 
-static void saa7164_work_enchandler(struct work_struct *w)
+static void saa7164_work_enchandler_helper(struct saa7164_port *port, int bufnr)
 {
-	struct saa7164_port *port =
-		container_of(w, struct saa7164_port, workenc);
 	struct saa7164_dev *dev = port->dev;
-	struct saa7164_buffer *buf;
-	struct saa7164_user_buffer *ubuf;
+	struct saa7164_buffer *buf = 0;
+	struct saa7164_user_buffer *ubuf = 0;
 	struct list_head *c, *n;
-	int wp, rp, i = 0;
-	u32 crc, ok = 0;
-	u8 *p;
-
-	port->last_svc_msecs_diff = port->last_svc_msecs;
-	port->last_svc_msecs = jiffies_to_msecs(jiffies);
-	port->last_svc_wp = saa7164_readl(port->bufcounter);
-	port->last_svc_rp = port->last_irq_rp;
-	wp = port->last_svc_wp;
-	rp = port->last_svc_rp;
-
-
-	port->last_svc_msecs_diff = port->last_svc_msecs -
-		port->last_svc_msecs_diff;
-
-	saa7164_histogram_update(&port->svc_interval,
-		port->last_svc_msecs_diff);
-
-	port->last_irq_svc_msecs_diff = port->last_svc_msecs -
-		port->last_irq_msecs;
-
-	saa7164_histogram_update(&port->irq_svc_interval,
-		port->last_irq_svc_msecs_diff);
-
-	dprintk(DBGLVL_IRQ,
-		"%s() %Ldms elapsed irq->deferred %Ldms wp: %d rp: %d\n",
-		__func__,
-		port->last_svc_msecs_diff,
-		port->last_irq_svc_msecs_diff,
-		port->last_svc_wp,
-		port->last_svc_rp
-		);
-
-	if ((rp < 0) || (rp > 7)) {
-		printk(KERN_ERR "%s() illegal rp count %d\n", __func__, rp);
-		return;
-	}
+	int i = 0;
 
 	mutex_lock(&port->dmaqueue_lock);
-
 	list_for_each_safe(c, n, &port->dmaqueue.list) {
 
 		buf = list_entry(c, struct saa7164_buffer, list);
@@ -296,33 +257,10 @@ static void saa7164_work_enchandler(struct work_struct *w)
 			break;
 		}
 
-		p = (u8 *)buf->cpu;
-		if (	(*(p + buf->actual_size + 0) != 0xff) ||
-			(*(p + buf->actual_size + 1) != 0xff) ||
-			(*(p + buf->actual_size + 2) != 0xff) ||
-			(*(p + buf->actual_size + 3) != 0xff) ||
-			(*(p + buf->actual_size + 0x10) != 0xff) ||
-			(*(p + buf->actual_size + 0x11) != 0xff) ||
-			(*(p + buf->actual_size + 0x12) != 0xff) ||
-			(*(p + buf->actual_size + 0x13) != 0xff) )
-		{
-			printk(KERN_ERR "%s() buf %p failed guard check\n", __func__, buf);
-			saa7164_dumphex16(dev, p + buf->actual_size - 32, 64);
-		}
-
-		if (buf->idx == wp) {
-			/* Ignore this, it's being updated currently by the dma engine */
-		} else
-		if (buf->idx == rp) {
-
-			crc = crc32(0, buf->cpu, buf->actual_size);
-//			if (crc != port->shadow_crc[rp])
-//				printk(KERN_ERR "%s crc didn't match shadow was 0x%x now 0x%x\n",
-//					__func__, port->shadow_crc[rp], crc);
+		if (buf->idx == bufnr) {
 
 			/* Found the buffer, deal with it */
-			dprintk(DBGLVL_IRQ, "%s() wp: %d processing: %d crc32: 0x%x\n",
-				__func__, wp, rp, buf->crc);
+			dprintk(DBGLVL_IRQ, "%s() rp: %d\n", __func__, bufnr);
 
 			/* Validate the incoming buffer content */
 			if (port->encoder_params.stream_type == V4L2_MPEG_STREAM_TYPE_MPEG2_TS)
@@ -339,17 +277,12 @@ static void saa7164_work_enchandler(struct work_struct *w)
 
 				if (buf->actual_size <= ubuf->actual_size) {
 
-					memcpy_fromio(ubuf->data, port->shadow_buf[rp],
+					memcpy_fromio(ubuf->data, buf->cpu,
 						ubuf->actual_size);
 
 					/* Throw a new checksum on the read buffer */
 					ubuf->crc = crc32(0, ubuf->data, ubuf->actual_size);
 
-					if ((crc == port->shadow_crc[rp]) && (crc == ubuf->crc))
-						ok = 1;
-					else
-						ok = 0;
-
 					/* Requeue the buffer on the free list */
 					ubuf->pos = 0;
 
@@ -369,26 +302,81 @@ static void saa7164_work_enchandler(struct work_struct *w)
 			/* Ensure offset into buffer remains 0, fill buffer
 			 * with known bad data. We check for this data at a later point
 			 * in time. */
-			saa7164_buffer_zero_offsets(port, rp);
+			saa7164_buffer_zero_offsets(port, bufnr);
 			memset_io(buf->cpu, 0xff, buf->pci_size);
-			buf->crc = crc32(0, buf->cpu, buf->actual_size);
 
 			break;
-		} else {
-			/* Validate all other checksums, on previous buffers - they should never change */
-			crc = crc32(0, buf->cpu, buf->actual_size);
-			if (crc != buf->crc) {
-				printk(KERN_ERR "buf[%d].crc became invalid, was 0x%x became 0x%x rp: %d wp: %d\n",
-					buf->idx, buf->crc, crc, rp, wp);
-				//saa7164_dumphex16FF(dev, (u8 *)buf->cpu, buf->actual_size);
-				saa7164_dumphex16FF(dev, (u8 *)buf->cpu, 256);
-				buf->crc = crc;
-			}
+		}
+	}
+	mutex_unlock(&port->dmaqueue_lock);
+}
+
+static void saa7164_work_enchandler(struct work_struct *w)
+{
+	struct saa7164_port *port =
+		container_of(w, struct saa7164_port, workenc);
+	struct saa7164_dev *dev = port->dev;
+
+	u32 wp, mcb, rp, cnt = 0;
 
+	port->last_svc_msecs_diff = port->last_svc_msecs;
+	port->last_svc_msecs = jiffies_to_msecs(jiffies);
+
+	port->last_svc_msecs_diff = port->last_svc_msecs -
+		port->last_svc_msecs_diff;
+
+	saa7164_histogram_update(&port->svc_interval,
+		port->last_svc_msecs_diff);
+
+	port->last_irq_svc_msecs_diff = port->last_svc_msecs -
+		port->last_irq_msecs;
+
+	saa7164_histogram_update(&port->irq_svc_interval,
+		port->last_irq_svc_msecs_diff);
+
+	dprintk(DBGLVL_IRQ,
+		"%s() %Ldms elapsed irq->deferred %Ldms wp: %d rp: %d\n",
+		__func__,
+		port->last_svc_msecs_diff,
+		port->last_irq_svc_msecs_diff,
+		port->last_svc_wp,
+		port->last_svc_rp
+		);
+
+	/* Current write position */
+	wp = saa7164_readl(port->bufcounter);
+	if (wp > (port->hwcfg.buffercount - 1)) {
+		printk(KERN_ERR "%s() illegal buf count %d\n", __func__, wp);
+		return;
+	}
+
+	/* Most current complete buffer */
+	if (wp == 0)
+		mcb = 7;
+	else
+		mcb = wp - 1;
+
+	while (1) {
+		rp = (port->last_svc_rp + 1) % 8;
+
+		if ((rp < 0) || (rp > 7)) {
+			printk(KERN_ERR "%s() illegal rp count %d\n", __func__, rp);
+			break;
 		}
 
+		/* Process a buffer */
+		if (port->nr == SAA7164_PORT_ENC1)
+			printk(KERN_ERR "Port enc1 processing buffer %d\n", rp);
+		saa7164_work_enchandler_helper(port, rp);
+		port->last_svc_rp = rp;
+		cnt++;
+
+		if (rp == mcb)
+			break;
 	}
-	mutex_unlock(&port->dmaqueue_lock);
+
+	if (port->nr == SAA7164_PORT_ENC1)
+		printk(KERN_ERR "Enc1 processed %d buffers for port %p\n", cnt, port);
 
 	if (print_histogram == port->nr) {
 		saa7164_histogram_print(port, &port->irq_interval);
@@ -399,6 +387,7 @@ static void saa7164_work_enchandler(struct work_struct *w)
 		print_histogram = 64 + port->nr;
 	}
 }
+
 static void saa7164_work_cmdhandler(struct work_struct *w)
 {
 	struct saa7164_dev *dev = container_of(w, struct saa7164_dev, workcmd);
@@ -420,49 +409,12 @@ static void saa7164_buffer_deliver(struct saa7164_buffer *buf)
 static irqreturn_t saa7164_irq_encoder(struct saa7164_port *port)
 {
 	struct saa7164_dev *dev = port->dev;
-	struct saa7164_buffer *buf;
-	struct list_head *c, *n;
-	int wp, rp, i = 0;
-	u8 *p;
-	u32 *up, j;
-
-	/* Find the current write point from the hardware */
-	wp = saa7164_readl(port->bufcounter);
-	if (wp > (port->hwcfg.buffercount - 1)) {
-		printk(KERN_ERR "%s() illegal buf count %d\n", __func__, wp);
-		return 0;
-	}
-
-	printk(KERN_ERR "port %p wp = %d\n", port, wp);
-
-	/* Find the previous buffer to the current write point */
-	if (wp == 0)
-		rp = 7;
-	else
-		rp = wp - 1;
-
-	if ((rp < 0) || (rp > 7)) {
-		printk(KERN_ERR "%s() illegal rp count %d\n", __func__, rp);
-		return 0;
-	}
-
-	if (rp == port->last_irq_rp) {
-		printk(KERN_ERR "%s() Duplicate rp = %d port %p\n",
-			__func__, rp, port);
-	}
-
-	if (rp != ((port->last_irq_rp + 1) % 8)) {
-		printk(KERN_ERR "%s() Multiple bufs on interrupt, port %p\n",
-			__func__, port);
-	}
 
 	/* Store old time */
 	port->last_irq_msecs_diff = port->last_irq_msecs;
 
 	/* Collect new stats */
 	port->last_irq_msecs = jiffies_to_msecs(jiffies);
-	port->last_irq_wp = wp;
-	port->last_irq_rp = rp;
 
 	/* Calculate stats */
 	port->last_irq_msecs_diff = port->last_irq_msecs -
@@ -471,58 +423,10 @@ static irqreturn_t saa7164_irq_encoder(struct saa7164_port *port)
 	saa7164_histogram_update(&port->irq_interval,
 		port->last_irq_msecs_diff);
 
-	dprintk(DBGLVL_IRQ, "%s() %Ldms elapsed wp: %d rp: %d\n",
-		__func__,
-		port->last_irq_msecs_diff,
-		port->last_irq_wp,
-		port->last_irq_rp
-		);
-	/* Find the used buffer, shadow copy it before we've
-	 * acked the interrupt.
-	 */
-//	mutex_lock(&port->dmaqueue_lock);
-	list_for_each_safe(c, n, &port->dmaqueue.list) {
-
-		buf = list_entry(c, struct saa7164_buffer, list);
-		if (i++ > port->hwcfg.buffercount) {
-			printk(KERN_ERR "%s() illegal i count %d\n",
-				__func__, i);
-			break;
-		}
-
-		p = (u8 *)buf->cpu;
-		if (	(*(p + buf->actual_size + 0) != 0xff) ||
-			(*(p + buf->actual_size + 1) != 0xff) ||
-			(*(p + buf->actual_size + 2) != 0xff) ||
-			(*(p + buf->actual_size + 3) != 0xff) ||
-			(*(p + buf->actual_size + 0x10) != 0xff) ||
-			(*(p + buf->actual_size + 0x11) != 0xff) ||
-			(*(p + buf->actual_size + 0x12) != 0xff) ||
-			(*(p + buf->actual_size + 0x13) != 0xff) )
-		{
-			printk(KERN_ERR "buf %p failed guard check\n", buf);
-			saa7164_dumphex16(dev, p + buf->actual_size - 32, 64);
-		}
-
-		if (buf->idx == rp) {
-			up = (u32 *)port->shadow_buf[rp];
-			for (j = 0 ; j < (buf->actual_size / sizeof(u32)); j++) {
-				*(up + j) = (rp << 28) | port->counter++;
-			}
-			port->shadow_crc[rp] = crc32(0, port->shadow_buf[rp], buf->actual_size);
-
-			buf->crc = crc32(0, buf->cpu, buf->actual_size);
-
-//			if (port->shadow_crc[rp] != buf->crc)
-//				printk(KERN_ERR "%s() crc check failed 0x%x vs 0x%x\n",
-//					__func__, port->shadow_crc[rp], buf->crc);
-			break;
-		}
+	dprintk(DBGLVL_IRQ, "%s() %Ldms elapsed\n", __func__,
+		port->last_irq_msecs_diff);
 
-	}
-//	mutex_unlock(&port->dmaqueue_lock);
 	schedule_work(&port->workenc);
-
 	return 0;
 }
 
diff --git a/drivers/media/video/saa7164/saa7164.h b/drivers/media/video/saa7164/saa7164.h
index 58141dfed246..9c76e65b9785 100644
--- a/drivers/media/video/saa7164/saa7164.h
+++ b/drivers/media/video/saa7164/saa7164.h
@@ -330,8 +330,8 @@ struct saa7164_port {
 
 	u64 last_irq_msecs, last_svc_msecs;
 	u64 last_irq_msecs_diff, last_svc_msecs_diff;
-	u32 last_irq_wp, last_svc_wp;
-	u32 last_irq_rp, last_svc_rp;
+	u32 last_svc_wp;
+	u32 last_svc_rp;
 	u64 last_irq_svc_msecs_diff;
 	u64 last_read_msecs, last_read_msecs_diff;
 	u64 last_poll_msecs, last_poll_msecs_diff;