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>
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@ -240,6 +240,7 @@ CLOCK
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devm_of_clk_add_hw_provider()
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devm_of_clk_add_hw_provider()
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DMA
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DMA
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dmaenginem_async_device_register()
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dmam_alloc_coherent()
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dmam_alloc_coherent()
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dmam_alloc_attrs()
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dmam_alloc_attrs()
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dmam_declare_coherent_memory()
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dmam_declare_coherent_memory()
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@ -1141,6 +1141,41 @@ void dma_async_device_unregister(struct dma_device *device)
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}
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}
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EXPORT_SYMBOL(dma_async_device_unregister);
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EXPORT_SYMBOL(dma_async_device_unregister);
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static void dmam_device_release(struct device *dev, void *res)
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{
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struct dma_device *device;
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device = *(struct dma_device **)res;
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dma_async_device_unregister(device);
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}
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/**
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* dmaenginem_async_device_register - registers DMA devices found
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* @device: &dma_device
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*
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* The operation is managed and will be undone on driver detach.
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*/
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int dmaenginem_async_device_register(struct dma_device *device)
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{
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void *p;
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int ret;
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p = devres_alloc(dmam_device_release, sizeof(void *), GFP_KERNEL);
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if (!p)
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return -ENOMEM;
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ret = dma_async_device_register(device);
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if (!ret) {
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*(struct dma_device **)p = device;
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devres_add(device->dev, p);
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} else {
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devres_free(p);
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}
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return ret;
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}
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EXPORT_SYMBOL(dmaenginem_async_device_register);
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struct dmaengine_unmap_pool {
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struct dmaengine_unmap_pool {
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struct kmem_cache *cache;
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struct kmem_cache *cache;
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const char *name;
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const char *name;
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@ -1406,6 +1406,7 @@ static inline int dmaengine_desc_free(struct dma_async_tx_descriptor *desc)
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/* --- DMA device --- */
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/* --- DMA device --- */
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int dma_async_device_register(struct dma_device *device);
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int dma_async_device_register(struct dma_device *device);
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int dmaenginem_async_device_register(struct dma_device *device);
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void dma_async_device_unregister(struct dma_device *device);
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void dma_async_device_unregister(struct dma_device *device);
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void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
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void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
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struct dma_chan *dma_get_slave_channel(struct dma_chan *chan);
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struct dma_chan *dma_get_slave_channel(struct dma_chan *chan);
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