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dmaengine: move driver-private helpers out of include/linux/dmaengine.h

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Move the following functions and declarations from the public header
include/linux/dmaengine.h into the driver-private header
drivers/dma/dmaengine.h, since they are only used by DMA engine drivers
and not by DMA engine consumers:

  - dma_async_device_register()
  - dmaenginem_async_device_register()
  - dma_async_device_unregister()
  - dma_async_device_channel_register()
  - dma_async_device_channel_unregister()
  - is_slave_direction()
  - dmaengine_get_direction_text()

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20261001143955.2195063-1-Frank.Li@oss.nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Frank Li 2026-10-01 10:39:53 -04:00 committed by Vinod Koul
parent 562b6ed45d
commit 511afae96d
3 changed files with 33 additions and 31 deletions
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32
drivers/dma/dmaengine.h
View File

@ -182,6 +182,38 @@ dmaengine_desc_callback_valid(struct dmaengine_desc_callback *cb)
struct dma_chan *dma_get_slave_channel(struct dma_chan *chan);
struct dma_chan *dma_get_any_slave_channel(struct dma_device *device);
static inline char *
dmaengine_get_direction_text(enum dma_transfer_direction dir)
{
switch (dir) {
case DMA_DEV_TO_MEM:
return "DEV_TO_MEM";
case DMA_MEM_TO_DEV:
return "MEM_TO_DEV";
case DMA_MEM_TO_MEM:
return "MEM_TO_MEM";
case DMA_DEV_TO_DEV:
return "DEV_TO_DEV";
default:
return "invalid";
}
}
static inline bool is_slave_direction(enum dma_transfer_direction direction)
{
return (direction == DMA_MEM_TO_DEV) || (direction == DMA_DEV_TO_MEM) ||
(direction == DMA_DEV_TO_DEV);
}
int dma_async_device_register(struct dma_device *device);
int dmaenginem_async_device_register(struct dma_device *device);
void dma_async_device_unregister(struct dma_device *device);
int dma_async_device_channel_register(struct dma_device *device,
struct dma_chan *chan,
const char *name);
void dma_async_device_channel_unregister(struct dma_device *device,
struct dma_chan *chan);
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>

1
drivers/dma/dw/dw.c
View File

@ -9,6 +9,7 @@
#include <linux/slab.h>
#include <linux/types.h>
#include "../dmaengine.h"
#include "internal.h"
static void dw_dma_initialize_chan(struct dw_dma_chan *dwc)

31
include/linux/dmaengine.h
View File

@ -1009,12 +1009,6 @@ static inline int dmaengine_slave_config(struct dma_chan *chan,
return -ENOSYS;
}
static inline bool is_slave_direction(enum dma_transfer_direction direction)
{
return (direction == DMA_MEM_TO_DEV) || (direction == DMA_DEV_TO_MEM) ||
(direction == DMA_DEV_TO_DEV);
}
static inline struct dma_async_tx_descriptor *
dmaengine_prep_config_single(struct dma_chan *chan, dma_addr_t buf, size_t len,
enum dma_transfer_direction dir,
@ -2087,14 +2081,6 @@ dmaengine_desc_set_callback(struct dma_async_tx_descriptor *tx,
/* --- DMA device --- */
int dma_async_device_register(struct dma_device *device);
int dmaenginem_async_device_register(struct dma_device *device);
void dma_async_device_unregister(struct dma_device *device);
int dma_async_device_channel_register(struct dma_device *device,
struct dma_chan *chan,
const char *name);
void dma_async_device_channel_unregister(struct dma_device *device,
struct dma_chan *chan);
void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
#define dma_request_channel(mask, x, y) \
__dma_request_channel(&(mask), x, y, NULL)
@ -2125,23 +2111,6 @@ static inline struct dma_chan
return dma_request_channel(mask, fn, fn_param);
}
static inline char *
dmaengine_get_direction_text(enum dma_transfer_direction dir)
{
switch (dir) {
case DMA_DEV_TO_MEM:
return "DEV_TO_MEM";
case DMA_MEM_TO_DEV:
return "MEM_TO_DEV";
case DMA_MEM_TO_MEM:
return "MEM_TO_MEM";
case DMA_DEV_TO_DEV:
return "DEV_TO_DEV";
default:
return "invalid";
}
}
static inline struct device *dmaengine_chan_dev(struct dma_chan *chan)
{
return &chan->chan_dev->device;