dma: coh901318: merge header files

[firefly-linux-kernel-4.4.55.git] / drivers / dma / coh901318.h

diff --git a/drivers/dma/coh901318.h b/drivers/dma/coh901318.h
index 275a36e1afc39d7a08d23924bacdc66ec55b8514..95ce1e2123ec8dc2904ad038f0d7f863acdbe080 100644 (file)
--- a/drivers/dma/coh901318.h
+++ b/drivers/dma/coh901318.h
@@ -11,6 +11,18 @@
 #define MAX_DMA_PACKET_SIZE_SHIFT 11
 #define MAX_DMA_PACKET_SIZE (1 << MAX_DMA_PACKET_SIZE_SHIFT)
 
+struct device;
+
+struct coh901318_pool {
+       spinlock_t lock;
+       struct dma_pool *dmapool;
+       struct device *dev;
+
+#ifdef CONFIG_DEBUG_FS
+       int debugfs_pool_counter;
+#endif
+};
+
 /**
  * struct coh901318_lli - linked list item for DMAC
  * @control: control settings for DMAC
@@ -30,4 +42,100 @@ struct coh901318_lli {
        dma_addr_t phy_this;
 };
 
+/**
+ * coh901318_pool_create() - Creates an dma pool for lli:s
+ * @pool: pool handle
+ * @dev: dma device
+ * @lli_nbr: number of lli:s in the pool
+ * @algin: address alignemtn of lli:s
+ * returns 0 on success otherwise none zero
+ */
+int coh901318_pool_create(struct coh901318_pool *pool,
+                         struct device *dev,
+                         size_t lli_nbr, size_t align);
+
+/**
+ * coh901318_pool_destroy() - Destroys the dma pool
+ * @pool: pool handle
+ * returns 0 on success otherwise none zero
+ */
+int coh901318_pool_destroy(struct coh901318_pool *pool);
+
+/**
+ * coh901318_lli_alloc() - Allocates a linked list
+ *
+ * @pool: pool handle
+ * @len: length to list
+ * return: none NULL if success otherwise NULL
+ */
+struct coh901318_lli *
+coh901318_lli_alloc(struct coh901318_pool *pool,
+                   unsigned int len);
+
+/**
+ * coh901318_lli_free() - Returns the linked list items to the pool
+ * @pool: pool handle
+ * @lli: reference to lli pointer to be freed
+ */
+void coh901318_lli_free(struct coh901318_pool *pool,
+                       struct coh901318_lli **lli);
+
+/**
+ * coh901318_lli_fill_memcpy() - Prepares the lli:s for dma memcpy
+ * @pool: pool handle
+ * @lli: allocated lli
+ * @src: src address
+ * @size: transfer size
+ * @dst: destination address
+ * @ctrl_chained: ctrl for chained lli
+ * @ctrl_last: ctrl for the last lli
+ * returns number of CPU interrupts for the lli, negative on error.
+ */
+int
+coh901318_lli_fill_memcpy(struct coh901318_pool *pool,
+                         struct coh901318_lli *lli,
+                         dma_addr_t src, unsigned int size,
+                         dma_addr_t dst, u32 ctrl_chained, u32 ctrl_last);
+
+/**
+ * coh901318_lli_fill_single() - Prepares the lli:s for dma single transfer
+ * @pool: pool handle
+ * @lli: allocated lli
+ * @buf: transfer buffer
+ * @size: transfer size
+ * @dev_addr: address of periphal
+ * @ctrl_chained: ctrl for chained lli
+ * @ctrl_last: ctrl for the last lli
+ * @dir: direction of transfer (to or from device)
+ * returns number of CPU interrupts for the lli, negative on error.
+ */
+int
+coh901318_lli_fill_single(struct coh901318_pool *pool,
+                         struct coh901318_lli *lli,
+                         dma_addr_t buf, unsigned int size,
+                         dma_addr_t dev_addr, u32 ctrl_chained, u32 ctrl_last,
+                         enum dma_transfer_direction dir);
+
+/**
+ * coh901318_lli_fill_single() - Prepares the lli:s for dma scatter list transfer
+ * @pool: pool handle
+ * @lli: allocated lli
+ * @sg: scatter gather list
+ * @nents: number of entries in sg
+ * @dev_addr: address of periphal
+ * @ctrl_chained: ctrl for chained lli
+ * @ctrl: ctrl of middle lli
+ * @ctrl_last: ctrl for the last lli
+ * @dir: direction of transfer (to or from device)
+ * @ctrl_irq_mask: ctrl mask for CPU interrupt
+ * returns number of CPU interrupts for the lli, negative on error.
+ */
+int
+coh901318_lli_fill_sg(struct coh901318_pool *pool,
+                     struct coh901318_lli *lli,
+                     struct scatterlist *sg, unsigned int nents,
+                     dma_addr_t dev_addr, u32 ctrl_chained,
+                     u32 ctrl, u32 ctrl_last,
+                     enum dma_transfer_direction dir, u32 ctrl_irq_mask);
+
 #endif /* COH901318_H */