mirror of https://gitee.com/openkylin/linux.git
dmaengine: add a new helper dmaenginem_async_device_register
This patch adds the dmaenginem_async_device_register for DMA code. Use the Devres to call the release for the DMA engine driver. Signed-off-by: Huang Shijie <sjhuang@iluvatar.ai> Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
parent
ec8ca8e3b4
commit
f39b948dbe
|
@ -240,6 +240,7 @@ CLOCK
|
|||
devm_of_clk_add_hw_provider()
|
||||
|
||||
DMA
|
||||
dmaenginem_async_device_register()
|
||||
dmam_alloc_coherent()
|
||||
dmam_alloc_attrs()
|
||||
dmam_declare_coherent_memory()
|
||||
|
|
|
@ -1141,6 +1141,41 @@ void dma_async_device_unregister(struct dma_device *device)
|
|||
}
|
||||
EXPORT_SYMBOL(dma_async_device_unregister);
|
||||
|
||||
static void dmam_device_release(struct device *dev, void *res)
|
||||
{
|
||||
struct dma_device *device;
|
||||
|
||||
device = *(struct dma_device **)res;
|
||||
dma_async_device_unregister(device);
|
||||
}
|
||||
|
||||
/**
|
||||
* dmaenginem_async_device_register - registers DMA devices found
|
||||
* @device: &dma_device
|
||||
*
|
||||
* The operation is managed and will be undone on driver detach.
|
||||
*/
|
||||
int dmaenginem_async_device_register(struct dma_device *device)
|
||||
{
|
||||
void *p;
|
||||
int ret;
|
||||
|
||||
p = devres_alloc(dmam_device_release, sizeof(void *), GFP_KERNEL);
|
||||
if (!p)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = dma_async_device_register(device);
|
||||
if (!ret) {
|
||||
*(struct dma_device **)p = device;
|
||||
devres_add(device->dev, p);
|
||||
} else {
|
||||
devres_free(p);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(dmaenginem_async_device_register);
|
||||
|
||||
struct dmaengine_unmap_pool {
|
||||
struct kmem_cache *cache;
|
||||
const char *name;
|
||||
|
|
|
@ -1406,6 +1406,7 @@ static inline int dmaengine_desc_free(struct dma_async_tx_descriptor *desc)
|
|||
/* --- 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);
|
||||
void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
|
||||
struct dma_chan *dma_get_slave_channel(struct dma_chan *chan);
|
||||
|
|
Loading…
Reference in New Issue