[PATCH v2 3/7] dmaengine: ptdma: Move common functions to common code

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

To focus on reusability of ptdma code across modules extract common
functions into reusable modules.

Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
---
 MAINTAINERS                             |  1 +
 drivers/dma/amd/common/amd_dma.c        | 23 +++++++++++++++++++++++
 drivers/dma/amd/common/amd_dma.h        |  3 +++
 drivers/dma/amd/ptdma/Makefile          |  2 +-
 drivers/dma/amd/ptdma/ptdma-dev.c       | 14 +-------------
 drivers/dma/amd/ptdma/ptdma-dmaengine.c |  3 +--
 drivers/dma/amd/ptdma/ptdma.h           |  2 --
 7 files changed, 30 insertions(+), 18 deletions(-)
 create mode 100644 drivers/dma/amd/common/amd_dma.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 0d222d1ca83f..3000ea780db4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -952,6 +952,7 @@ M:	Basavaraj Natikar <Basavaraj.Natikar@amd.com>
 L:	dmaengine@vger.kernel.org
 S:	Maintained
 F:	drivers/dma/amd/ae4dma/
+F:	drivers/dma/amd/common/
 
 AMD AXI W1 DRIVER
 M:	Kris Chaplin <kris.chaplin@amd.com>
diff --git a/drivers/dma/amd/common/amd_dma.c b/drivers/dma/amd/common/amd_dma.c
new file mode 100644
index 000000000000..3552d36fa8b9
--- /dev/null
+++ b/drivers/dma/amd/common/amd_dma.c
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * AMD DMA Driver common
+ *
+ * Copyright (c) 2024, Advanced Micro Devices, Inc.
+ * All Rights Reserved.
+ *
+ * Author: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
+ */
+
+#include "../common/amd_dma.h"
+
+void pt_start_queue(struct pt_cmd_queue *cmd_q)
+{
+	/* Turn on the run bit */
+	iowrite32(cmd_q->qcontrol | CMD_Q_RUN, cmd_q->reg_control);
+}
+
+void pt_stop_queue(struct pt_cmd_queue *cmd_q)
+{
+	/* Turn off the run bit */
+	iowrite32(cmd_q->qcontrol & ~CMD_Q_RUN, cmd_q->reg_control);
+}
diff --git a/drivers/dma/amd/common/amd_dma.h b/drivers/dma/amd/common/amd_dma.h
index f9f396cd4371..44251918f157 100644
--- a/drivers/dma/amd/common/amd_dma.h
+++ b/drivers/dma/amd/common/amd_dma.h
@@ -23,4 +23,7 @@
 #include "../ptdma/ptdma.h"
 #include "../../virt-dma.h"
 
+void pt_start_queue(struct pt_cmd_queue *cmd_q);
+void pt_stop_queue(struct pt_cmd_queue *cmd_q);
+
 #endif
diff --git a/drivers/dma/amd/ptdma/Makefile b/drivers/dma/amd/ptdma/Makefile
index ce5410268a9a..42606d7302e6 100644
--- a/drivers/dma/amd/ptdma/Makefile
+++ b/drivers/dma/amd/ptdma/Makefile
@@ -5,6 +5,6 @@
 
 obj-$(CONFIG_AMD_PTDMA) += ptdma.o
 
-ptdma-objs := ptdma-dev.o ptdma-dmaengine.o ptdma-debugfs.o
+ptdma-objs := ptdma-dev.o ptdma-dmaengine.o ptdma-debugfs.o ../common/amd_dma.o
 
 ptdma-$(CONFIG_PCI) += ptdma-pci.o
diff --git a/drivers/dma/amd/ptdma/ptdma-dev.c b/drivers/dma/amd/ptdma/ptdma-dev.c
index a2bf13ff18b6..506b3dfca549 100644
--- a/drivers/dma/amd/ptdma/ptdma-dev.c
+++ b/drivers/dma/amd/ptdma/ptdma-dev.c
@@ -17,7 +17,7 @@
 #include <linux/module.h>
 #include <linux/pci.h>
 
-#include "ptdma.h"
+#include "../common/amd_dma.h"
 
 /* Human-readable error strings */
 static char *pt_error_codes[] = {
@@ -54,18 +54,6 @@ static void pt_log_error(struct pt_device *d, int e)
 	dev_err(d->dev, "PTDMA error: %s (0x%x)\n", pt_error_codes[e], e);
 }
 
-void pt_start_queue(struct pt_cmd_queue *cmd_q)
-{
-	/* Turn on the run bit */
-	iowrite32(cmd_q->qcontrol | CMD_Q_RUN, cmd_q->reg_control);
-}
-
-void pt_stop_queue(struct pt_cmd_queue *cmd_q)
-{
-	/* Turn off the run bit */
-	iowrite32(cmd_q->qcontrol & ~CMD_Q_RUN, cmd_q->reg_control);
-}
-
 static int pt_core_execute_cmd(struct ptdma_desc *desc, struct pt_cmd_queue *cmd_q)
 {
 	bool soc = FIELD_GET(DWORD0_SOC, desc->dw0);
diff --git a/drivers/dma/amd/ptdma/ptdma-dmaengine.c b/drivers/dma/amd/ptdma/ptdma-dmaengine.c
index a2e7c2cec15e..66ea10499643 100644
--- a/drivers/dma/amd/ptdma/ptdma-dmaengine.c
+++ b/drivers/dma/amd/ptdma/ptdma-dmaengine.c
@@ -9,8 +9,7 @@
  * Author: Gary R Hook <gary.hook@amd.com>
  */
 
-#include "ptdma.h"
-#include "../../dmaengine.h"
+#include "../common/amd_dma.h"
 
 static inline struct pt_dma_chan *to_pt_chan(struct dma_chan *dma_chan)
 {
diff --git a/drivers/dma/amd/ptdma/ptdma.h b/drivers/dma/amd/ptdma/ptdma.h
index 2690a32fc7cb..b4f9ee83b074 100644
--- a/drivers/dma/amd/ptdma/ptdma.h
+++ b/drivers/dma/amd/ptdma/ptdma.h
@@ -322,8 +322,6 @@ int pt_core_perform_passthru(struct pt_cmd_queue *cmd_q,
 			     struct pt_passthru_engine *pt_engine);
 
 void pt_check_status_trans(struct pt_device *pt, struct pt_cmd_queue *cmd_q);
-void pt_start_queue(struct pt_cmd_queue *cmd_q);
-void pt_stop_queue(struct pt_cmd_queue *cmd_q);
 
 static inline void pt_core_disable_queue_interrupts(struct pt_device *pt)
 {
-- 
2.25.1