ata: libata: tracepoints for bus-master DMA

Add tracepoints for bus-master DMA and taskfile related functions.
That allows us to drop the relevant DPRINTK() calls.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

1 files changed, 21 insertions, 23 deletions

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 4cc7c0606e06..76bd87691978 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -18,7 +18,7 @@
 #include <linux/module.h>
 #include <linux/libata.h>
 #include <linux/highmem.h>
-
+#include <trace/events/libata.h>
 #include "libata.h"
 
 static struct workqueue_struct *ata_sff_wq;
@@ -409,12 +409,6 @@ void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
 		iowrite8(tf->hob_lbal, ioaddr->lbal_addr);
 		iowrite8(tf->hob_lbam, ioaddr->lbam_addr);
 		iowrite8(tf->hob_lbah, ioaddr->lbah_addr);
-		VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
-			tf->hob_feature,
-			tf->hob_nsect,
-			tf->hob_lbal,
-			tf->hob_lbam,
-			tf->hob_lbah);
 	}
 
 	if (is_addr) {
@@ -423,18 +417,10 @@ void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
 		iowrite8(tf->lbal, ioaddr->lbal_addr);
 		iowrite8(tf->lbam, ioaddr->lbam_addr);
 		iowrite8(tf->lbah, ioaddr->lbah_addr);
-		VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
-			tf->feature,
-			tf->nsect,
-			tf->lbal,
-			tf->lbam,
-			tf->lbah);
 	}
 
-	if (tf->flags & ATA_TFLAG_DEVICE) {
+	if (tf->flags & ATA_TFLAG_DEVICE)
 		iowrite8(tf->device, ioaddr->device_addr);
-		VPRINTK("device 0x%X\n", tf->device);
-	}
 
 	ata_wait_idle(ap);
 }
@@ -494,8 +480,6 @@ EXPORT_SYMBOL_GPL(ata_sff_tf_read);
  */
 void ata_sff_exec_command(struct ata_port *ap, const struct ata_taskfile *tf)
 {
-	DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
-
 	iowrite8(tf->command, ap->ioaddr.command_addr);
 	ata_sff_pause(ap);
 }
@@ -505,6 +489,7 @@ EXPORT_SYMBOL_GPL(ata_sff_exec_command);
  *	ata_tf_to_host - issue ATA taskfile to host controller
  *	@ap: port to which command is being issued
  *	@tf: ATA taskfile register set
+ *	@tag: tag of the associated command
  *
  *	Issues ATA taskfile register set to ATA host controller,
  *	with proper synchronization with interrupt handler and
@@ -514,9 +499,12 @@ EXPORT_SYMBOL_GPL(ata_sff_exec_command);
  *	spin_lock_irqsave(host lock)
  */
 static inline void ata_tf_to_host(struct ata_port *ap,
-				  const struct ata_taskfile *tf)
+				  const struct ata_taskfile *tf,
+				  unsigned int tag)
 {
+	trace_ata_tf_load(ap, tf);
 	ap->ops->sff_tf_load(ap, tf);
+	trace_ata_exec_command(ap, tf, tag);
 	ap->ops->sff_exec_command(ap, tf);
 }
 
@@ -768,6 +756,7 @@ static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
 	case ATAPI_PROT_DMA:
 		ap->hsm_task_state = HSM_ST_LAST;
 		/* initiate bmdma */
+		trace_ata_bmdma_start(ap, &qc->tf, qc->tag);
 		ap->ops->bmdma_start(qc);
 		break;
 #endif /* CONFIG_ATA_BMDMA */
@@ -1376,7 +1365,7 @@ unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc)
 		if (qc->tf.flags & ATA_TFLAG_POLLING)
 			ata_qc_set_polling(qc);
 
-		ata_tf_to_host(ap, &qc->tf);
+		ata_tf_to_host(ap, &qc->tf, qc->tag);
 		ap->hsm_task_state = HSM_ST_LAST;
 
 		if (qc->tf.flags & ATA_TFLAG_POLLING)
@@ -1388,7 +1377,7 @@ unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc)
 		if (qc->tf.flags & ATA_TFLAG_POLLING)
 			ata_qc_set_polling(qc);
 
-		ata_tf_to_host(ap, &qc->tf);
+		ata_tf_to_host(ap, &qc->tf, qc->tag);
 
 		if (qc->tf.flags & ATA_TFLAG_WRITE) {
 			/* PIO data out protocol */
@@ -1418,7 +1407,7 @@ unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc)
 		if (qc->tf.flags & ATA_TFLAG_POLLING)
 			ata_qc_set_polling(qc);
 
-		ata_tf_to_host(ap, &qc->tf);
+		ata_tf_to_host(ap, &qc->tf, qc->tag);
 
 		ap->hsm_task_state = HSM_ST_FIRST;
 
@@ -2745,8 +2734,11 @@ unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc)
 	case ATA_PROT_DMA:
 		WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING);
 
+		trace_ata_tf_load(ap, &qc->tf);
 		ap->ops->sff_tf_load(ap, &qc->tf);  /* load tf registers */
+		trace_ata_bmdma_setup(ap, &qc->tf, qc->tag);
 		ap->ops->bmdma_setup(qc);	    /* set up bmdma */
+		trace_ata_bmdma_start(ap, &qc->tf, qc->tag);
 		ap->ops->bmdma_start(qc);	    /* initiate bmdma */
 		ap->hsm_task_state = HSM_ST_LAST;
 		break;
@@ -2754,7 +2746,9 @@ unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc)
 	case ATAPI_PROT_DMA:
 		WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING);
 
+		trace_ata_tf_load(ap, &qc->tf);
 		ap->ops->sff_tf_load(ap, &qc->tf);  /* load tf registers */
+		trace_ata_bmdma_setup(ap, &qc->tf, qc->tag);
 		ap->ops->bmdma_setup(qc);	    /* set up bmdma */
 		ap->hsm_task_state = HSM_ST_FIRST;
 
@@ -2795,13 +2789,14 @@ unsigned int ata_bmdma_port_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
 	if (ap->hsm_task_state == HSM_ST_LAST && ata_is_dma(qc->tf.protocol)) {
 		/* check status of DMA engine */
 		host_stat = ap->ops->bmdma_status(ap);
-		VPRINTK("ata%u: host_stat 0x%X\n", ap->print_id, host_stat);
+		trace_ata_bmdma_status(ap, host_stat);
 
 		/* if it's not our irq... */
 		if (!(host_stat & ATA_DMA_INTR))
 			return ata_sff_idle_irq(ap);
 
 		/* before we do anything else, clear DMA-Start bit */
+		trace_ata_bmdma_stop(ap, &qc->tf, qc->tag);
 		ap->ops->bmdma_stop(qc);
 		bmdma_stopped = true;
 
@@ -2870,6 +2865,7 @@ void ata_bmdma_error_handler(struct ata_port *ap)
 		u8 host_stat;
 
 		host_stat = ap->ops->bmdma_status(ap);
+		trace_ata_bmdma_status(ap, host_stat);
 
 		/* BMDMA controllers indicate host bus error by
 		 * setting DMA_ERR bit and timing out.  As it wasn't
@@ -2881,6 +2877,7 @@ void ata_bmdma_error_handler(struct ata_port *ap)
 			thaw = true;
 		}
 
+		trace_ata_bmdma_stop(ap, &qc->tf, qc->tag);
 		ap->ops->bmdma_stop(qc);
 
 		/* if we're gonna thaw, make sure IRQ is clear */
@@ -2914,6 +2911,7 @@ void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc)
 
 	if (ata_is_dma(qc->tf.protocol)) {
 		spin_lock_irqsave(ap->lock, flags);
+		trace_ata_bmdma_stop(ap, &qc->tf, qc->tag);
 		ap->ops->bmdma_stop(qc);
 		spin_unlock_irqrestore(ap->lock, flags);
 	}