[PATCH 6/7] dmaengine: ptdma: Extend ptdma-debugfs to support multi-queue

[Basavaraj Natikar <Basavaraj.Natikar@amd.com>]

To support multi-channel functionality with AE4DMA engine, extend the
ptdma-debugfs with reusable components.

Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
---
 drivers/dma/amd/ptdma/ptdma-debugfs.c | 76 +++++++++++++++++++--------
 1 file changed, 55 insertions(+), 21 deletions(-)

diff --git a/drivers/dma/amd/ptdma/ptdma-debugfs.c b/drivers/dma/amd/ptdma/ptdma-debugfs.c
index c8307d3044a3..9aa7a49ae5be 100644
--- a/drivers/dma/amd/ptdma/ptdma-debugfs.c
+++ b/drivers/dma/amd/ptdma/ptdma-debugfs.c
@@ -12,7 +12,7 @@
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 
-#include "ptdma.h"
+#include "../common/amd_dma.h"
 
 /* DebugFS helpers */
 #define	RI_VERSION_NUM	0x0000003F
@@ -23,11 +23,19 @@
 static int pt_debugfs_info_show(struct seq_file *s, void *p)
 {
 	struct pt_device *pt = s->private;
+	struct ae4_device *ae4;
 	unsigned int regval;
 
 	seq_printf(s, "Device name: %s\n", dev_name(pt->dev));
-	seq_printf(s, "   # Queues: %d\n", 1);
-	seq_printf(s, "     # Cmds: %d\n", pt->cmd_count);
+
+	if (pt->ver == AE4_DMA_VERSION) {
+		ae4 = container_of(pt, struct ae4_device, pt);
+		seq_printf(s, "   # Queues: %d\n", ae4->cmd_q_count);
+		seq_printf(s, "     # Cmds per queue: %d\n", CMD_Q_LEN);
+	} else {
+		seq_printf(s, "   # Queues: %d\n", 1);
+		seq_printf(s, "     # Cmds: %d\n", pt->cmd_count);
+	}
 
 	regval = ioread32(pt->io_regs + CMD_PT_VERSION);
 
@@ -55,6 +63,7 @@ static int pt_debugfs_stats_show(struct seq_file *s, void *p)
 static int pt_debugfs_queue_show(struct seq_file *s, void *p)
 {
 	struct pt_cmd_queue *cmd_q = s->private;
+	struct pt_device *pt;
 	unsigned int regval;
 
 	if (!cmd_q)
@@ -62,18 +71,24 @@ static int pt_debugfs_queue_show(struct seq_file *s, void *p)
 
 	seq_printf(s, "               Pass-Thru: %ld\n", cmd_q->total_pt_ops);
 
-	regval = ioread32(cmd_q->reg_control + 0x000C);
-
-	seq_puts(s, "      Enabled Interrupts:");
-	if (regval & INT_EMPTY_QUEUE)
-		seq_puts(s, " EMPTY");
-	if (regval & INT_QUEUE_STOPPED)
-		seq_puts(s, " STOPPED");
-	if (regval & INT_ERROR)
-		seq_puts(s, " ERROR");
-	if (regval & INT_COMPLETION)
-		seq_puts(s, " COMPLETION");
-	seq_puts(s, "\n");
+	pt = cmd_q->pt;
+	if (pt->ver == AE4_DMA_VERSION) {
+		regval = readl(cmd_q->reg_control + 0x4);
+		seq_printf(s, "     Enabled Interrupts:: status 0x%x\n", regval);
+	} else {
+		regval = ioread32(cmd_q->reg_control + 0x000C);
+
+		seq_puts(s, "      Enabled Interrupts:");
+		if (regval & INT_EMPTY_QUEUE)
+			seq_puts(s, " EMPTY");
+		if (regval & INT_QUEUE_STOPPED)
+			seq_puts(s, " STOPPED");
+		if (regval & INT_ERROR)
+			seq_puts(s, " ERROR");
+		if (regval & INT_COMPLETION)
+			seq_puts(s, " COMPLETION");
+		seq_puts(s, "\n");
+	}
 
 	return 0;
 }
@@ -84,8 +99,12 @@ DEFINE_SHOW_ATTRIBUTE(pt_debugfs_stats);
 
 void ptdma_debugfs_setup(struct pt_device *pt)
 {
-	struct pt_cmd_queue *cmd_q;
 	struct dentry *debugfs_q_instance;
+	struct ae4_cmd_queue *ae4cmd_q;
+	struct pt_cmd_queue *cmd_q;
+	struct ae4_device *ae4;
+	char name[30];
+	int i;
 
 	if (!debugfs_initialized())
 		return;
@@ -96,11 +115,26 @@ void ptdma_debugfs_setup(struct pt_device *pt)
 	debugfs_create_file("stats", 0400, pt->dma_dev.dbg_dev_root, pt,
 			    &pt_debugfs_stats_fops);
 
-	cmd_q = &pt->cmd_q;
 
-	debugfs_q_instance =
-		debugfs_create_dir("q", pt->dma_dev.dbg_dev_root);
+	if (pt->ver == AE4_DMA_VERSION) {
+		ae4 = container_of(pt, struct ae4_device, pt);
+		for (i = 0; i < ae4->cmd_q_count; i++) {
+			ae4cmd_q = &ae4->ae4cmd_q[i];
+			cmd_q = &ae4cmd_q->cmd_q;
+
+			snprintf(name, 29, "q%d", ae4cmd_q->id);
+
+			debugfs_q_instance =
+				debugfs_create_dir(name, pt->dma_dev.dbg_dev_root);
 
-	debugfs_create_file("stats", 0400, debugfs_q_instance, cmd_q,
-			    &pt_debugfs_queue_fops);
+			debugfs_create_file("stats", 0400, debugfs_q_instance, cmd_q,
+					    &pt_debugfs_queue_fops);
+		}
+	} else {
+		debugfs_q_instance =
+			debugfs_create_dir("q", pt->dma_dev.dbg_dev_root);
+		cmd_q = &pt->cmd_q;
+		debugfs_create_file("stats", 0400, debugfs_q_instance, cmd_q,
+				    &pt_debugfs_queue_fops);
+	}
 }
-- 
2.25.1