dmaengine: Move AMD PTDMA driver to amd directory

PTDMA driver is the AMD DMA driver, and newer AMD platforms support newer
DMA engines. Hence, move the current drivers to the AMD directory. This
would also mean that future driver submissions to the AMD DMA driver will
also land in the AMD-specific directory.

Reviewed-by: Raju Rangoju <[email protected]>
Signed-off-by: Basavaraj Natikar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: basuamd

MAINTAINERS

@@ -1164,8 +1164,8 @@ F:	tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
 AMD PTDMA DRIVER
 M:	Basavaraj Natikar <[email protected]>
 L:	[email protected]
-S:	Maintained
-F:	drivers/dma/ptdma/
+S:	Supported
+F:	drivers/dma/amd/ptdma/
 
 AMD QDMA DRIVER
 M:	Nishad Saraf <[email protected]>

drivers/dma/Kconfig

@@ -740,8 +740,6 @@ source "drivers/dma/bestcomm/Kconfig"
 
 source "drivers/dma/mediatek/Kconfig"
 
-source "drivers/dma/ptdma/Kconfig"
-
 source "drivers/dma/qcom/Kconfig"
 
 source "drivers/dma/dw/Kconfig"

drivers/dma/Makefile

@@ -16,7 +16,6 @@ obj-$(CONFIG_DMATEST) += dmatest.o
 obj-$(CONFIG_ALTERA_MSGDMA) += altera-msgdma.o
 obj-$(CONFIG_AMBA_PL08X) += amba-pl08x.o
 obj-$(CONFIG_AMCC_PPC440SPE_ADMA) += ppc4xx/
-obj-$(CONFIG_AMD_PTDMA) += ptdma/
 obj-$(CONFIG_APPLE_ADMAC) += apple-admac.o
 obj-$(CONFIG_AT_HDMAC) += at_hdmac.o
 obj-$(CONFIG_AT_XDMAC) += at_xdmac.o

drivers/dma/amd/Kconfig

@@ -1,4 +1,17 @@
 # SPDX-License-Identifier: GPL-2.0-only
+#
+config AMD_PTDMA
+	tristate  "AMD PassThru DMA Engine"
+	depends on X86_64 && PCI
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	help
+	  Enable support for the AMD PTDMA controller. This controller
+	  provides DMA capabilities to perform high bandwidth memory to
+	  memory and IO copy operations. It performs DMA transfer through
+	  queue-based descriptor management. This DMA controller is intended
+	  to be used with AMD Non-Transparent Bridge devices and not for
+	  general purpose peripheral DMA.
 
 config AMD_QDMA
 	tristate "AMD Queue-based DMA"

drivers/dma/amd/Makefile

@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
 
+obj-$(CONFIG_AMD_PTDMA) += ptdma/
 obj-$(CONFIG_AMD_QDMA) += qdma/

drivers/dma/ptdma/Makefile renamed to drivers/dma/amd/ptdma/Makefile

@@ -10,8 +10,7 @@
  */
 
 #include "ptdma.h"
-#include "../dmaengine.h"
-#include "../virt-dma.h"
+#include "../../dmaengine.h"
 
 static inline struct pt_dma_chan *to_pt_chan(struct dma_chan *dma_chan)
 {

drivers/dma/ptdma/ptdma-debugfs.c renamed to drivers/dma/amd/ptdma/ptdma-debugfs.c

@@ -22,7 +22,7 @@
 #include <linux/wait.h>
 #include <linux/dmapool.h>
 
-#include "../virt-dma.h"
+#include "../../virt-dma.h"
 
 #define MAX_PT_NAME_LEN			16
 #define MAX_DMAPOOL_NAME_LEN		32