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-rw-r--r--include/linux/dmaengine.h76
1 files changed, 76 insertions, 0 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index ad4197572..e2f5eb419 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -65,6 +65,7 @@ enum dma_transaction_type {
DMA_PQ,
DMA_XOR_VAL,
DMA_PQ_VAL,
+ DMA_MEMSET,
DMA_INTERRUPT,
DMA_SG,
DMA_PRIVATE,
@@ -122,10 +123,18 @@ enum dma_transfer_direction {
* chunk and before first src/dst address for next chunk.
* Ignored for dst(assumed 0), if dst_inc is true and dst_sgl is false.
* Ignored for src(assumed 0), if src_inc is true and src_sgl is false.
+ * @dst_icg: Number of bytes to jump after last dst address of this
+ * chunk and before the first dst address for next chunk.
+ * Ignored if dst_inc is true and dst_sgl is false.
+ * @src_icg: Number of bytes to jump after last src address of this
+ * chunk and before the first src address for next chunk.
+ * Ignored if src_inc is true and src_sgl is false.
*/
struct data_chunk {
size_t size;
size_t icg;
+ size_t dst_icg;
+ size_t src_icg;
};
/**
@@ -222,6 +231,16 @@ struct dma_chan_percpu {
};
/**
+ * struct dma_router - DMA router structure
+ * @dev: pointer to the DMA router device
+ * @route_free: function to be called when the route can be disconnected
+ */
+struct dma_router {
+ struct device *dev;
+ void (*route_free)(struct device *dev, void *route_data);
+};
+
+/**
* struct dma_chan - devices supply DMA channels, clients use them
* @device: ptr to the dma device who supplies this channel, always !%NULL
* @cookie: last cookie value returned to client
@@ -232,6 +251,8 @@ struct dma_chan_percpu {
* @local: per-cpu pointer to a struct dma_chan_percpu
* @client_count: how many clients are using this channel
* @table_count: number of appearances in the mem-to-mem allocation table
+ * @router: pointer to the DMA router structure
+ * @route_data: channel specific data for the router
* @private: private data for certain client-channel associations
*/
struct dma_chan {
@@ -247,6 +268,11 @@ struct dma_chan {
struct dma_chan_percpu __percpu *local;
int client_count;
int table_count;
+
+ /* DMA router */
+ struct dma_router *router;
+ void *route_data;
+
void *private;
};
@@ -570,6 +596,7 @@ struct dma_tx_state {
* @copy_align: alignment shift for memcpy operations
* @xor_align: alignment shift for xor operations
* @pq_align: alignment shift for pq operations
+ * @fill_align: alignment shift for memset operations
* @dev_id: unique device ID
* @dev: struct device reference for dma mapping api
* @src_addr_widths: bit mask of src addr widths the device supports
@@ -588,6 +615,7 @@ struct dma_tx_state {
* @device_prep_dma_xor_val: prepares a xor validation operation
* @device_prep_dma_pq: prepares a pq operation
* @device_prep_dma_pq_val: prepares a pqzero_sum operation
+ * @device_prep_dma_memset: prepares a memset operation
* @device_prep_dma_interrupt: prepares an end of chain interrupt operation
* @device_prep_slave_sg: prepares a slave dma operation
* @device_prep_dma_cyclic: prepare a cyclic dma operation suitable for audio.
@@ -620,6 +648,7 @@ struct dma_device {
u8 copy_align;
u8 xor_align;
u8 pq_align;
+ u8 fill_align;
#define DMA_HAS_PQ_CONTINUE (1 << 15)
int dev_id;
@@ -650,6 +679,9 @@ struct dma_device {
struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf, size_t len,
enum sum_check_flags *pqres, unsigned long flags);
+ struct dma_async_tx_descriptor *(*device_prep_dma_memset)(
+ struct dma_chan *chan, dma_addr_t dest, int value, size_t len,
+ unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_interrupt)(
struct dma_chan *chan, unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_sg)(
@@ -745,6 +777,17 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_interleaved_dma(
return chan->device->device_prep_interleaved_dma(chan, xt, flags);
}
+static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_memset(
+ struct dma_chan *chan, dma_addr_t dest, int value, size_t len,
+ unsigned long flags)
+{
+ if (!chan || !chan->device)
+ return NULL;
+
+ return chan->device->device_prep_dma_memset(chan, dest, value,
+ len, flags);
+}
+
static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_sg(
struct dma_chan *chan,
struct scatterlist *dst_sg, unsigned int dst_nents,
@@ -820,6 +863,12 @@ static inline bool is_dma_pq_aligned(struct dma_device *dev, size_t off1,
return dmaengine_check_align(dev->pq_align, off1, off2, len);
}
+static inline bool is_dma_fill_aligned(struct dma_device *dev, size_t off1,
+ size_t off2, size_t len)
+{
+ return dmaengine_check_align(dev->fill_align, off1, off2, len);
+}
+
static inline void
dma_set_maxpq(struct dma_device *dma, int maxpq, int has_pq_continue)
{
@@ -874,6 +923,33 @@ static inline int dma_maxpq(struct dma_device *dma, enum dma_ctrl_flags flags)
BUG();
}
+static inline size_t dmaengine_get_icg(bool inc, bool sgl, size_t icg,
+ size_t dir_icg)
+{
+ if (inc) {
+ if (dir_icg)
+ return dir_icg;
+ else if (sgl)
+ return icg;
+ }
+
+ return 0;
+}
+
+static inline size_t dmaengine_get_dst_icg(struct dma_interleaved_template *xt,
+ struct data_chunk *chunk)
+{
+ return dmaengine_get_icg(xt->dst_inc, xt->dst_sgl,
+ chunk->icg, chunk->dst_icg);
+}
+
+static inline size_t dmaengine_get_src_icg(struct dma_interleaved_template *xt,
+ struct data_chunk *chunk)
+{
+ return dmaengine_get_icg(xt->src_inc, xt->src_sgl,
+ chunk->icg, chunk->src_icg);
+}
+
/* --- public DMA engine API --- */
#ifdef CONFIG_DMA_ENGINE