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authorLinus Walleij <linus.walleij@linaro.org>2013-01-04 17:12:13 +0400
committerLinus Walleij <linus.walleij@linaro.org>2013-01-07 20:36:37 +0400
commitd70a8ed3121e67da8e8bb713d592d9498916c58e (patch)
tree4527da2094e41f2d3cfb5a7a948f4669b0301fca /drivers/dma/coh901318.h
parent03b5357c3005e097f314136bade3683a0525b68f (diff)
downloadlinux-d70a8ed3121e67da8e8bb713d592d9498916c58e.tar.xz
dma: coh901318: merge header files
We do not need two header files for the two parts of the driver to talk to each other so merge them into one. Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/dma/coh901318.h')
-rw-r--r--drivers/dma/coh901318.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/dma/coh901318.h b/drivers/dma/coh901318.h
index 275a36e1afc3..95ce1e2123ec 100644
--- 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 */