This changeset adds support in DMA library to free source DMA buffer by
hardware. On a supported hardware, application can pass on the mempool
information as part of vchan config when the DMA transfer direction is
configured as RTE_DMA_DIR_MEM_TO_DEV.
Signed-off-by: Amit Prakash Shukla <amitpraka...@marvell.com>
---
lib/dmadev/rte_dmadev.h | 45 +++++++++++++++++++++++++++++------------
1 file changed, 32 insertions(+), 13 deletions(-)
diff --git a/lib/dmadev/rte_dmadev.h b/lib/dmadev/rte_dmadev.h
index e61d71959e..98539e5830 100644
--- a/lib/dmadev/rte_dmadev.h
+++ b/lib/dmadev/rte_dmadev.h
@@ -241,26 +241,26 @@ int16_t rte_dma_next_dev(int16_t start_dev_id);
* @see struct rte_dma_info::dev_capa
*/
/** Support memory-to-memory transfer */
-#define RTE_DMA_CAPA_MEM_TO_MEM RTE_BIT64(0)
+#define RTE_DMA_CAPA_MEM_TO_MEM RTE_BIT64(0)
/** Support memory-to-device transfer. */
-#define RTE_DMA_CAPA_MEM_TO_DEV RTE_BIT64(1)
+#define RTE_DMA_CAPA_MEM_TO_DEV RTE_BIT64(1)
/** Support device-to-memory transfer. */
-#define RTE_DMA_CAPA_DEV_TO_MEM RTE_BIT64(2)
+#define RTE_DMA_CAPA_DEV_TO_MEM RTE_BIT64(2)
/** Support device-to-device transfer. */
-#define RTE_DMA_CAPA_DEV_TO_DEV RTE_BIT64(3)
+#define RTE_DMA_CAPA_DEV_TO_DEV RTE_BIT64(3)
/** Support SVA which could use VA as DMA address.
* If device support SVA then application could pass any VA address like memory
* from rte_malloc(), rte_memzone(), malloc, stack memory.
* If device don't support SVA, then application should pass IOVA address which
* from rte_malloc(), rte_memzone().
*/
-#define RTE_DMA_CAPA_SVA RTE_BIT64(4)
+#define RTE_DMA_CAPA_SVA RTE_BIT64(4)
/** Support work in silent mode.
* In this mode, application don't required to invoke rte_dma_completed*()
* API.
* @see struct rte_dma_conf::silent_mode
*/
-#define RTE_DMA_CAPA_SILENT RTE_BIT64(5)
+#define RTE_DMA_CAPA_SILENT RTE_BIT64(5)
/** Supports error handling
*
* With this bit set, invalid input addresses will be reported as operation
failures
@@ -268,16 +268,18 @@ int16_t rte_dma_next_dev(int16_t start_dev_id);
* Without this bit set, invalid data is not handled by either HW or driver,
so user
* must ensure that all memory addresses are valid and accessible by HW.
*/
-#define RTE_DMA_CAPA_HANDLES_ERRORS RTE_BIT64(6)
+#define RTE_DMA_CAPA_HANDLES_ERRORS RTE_BIT64(6)
/** Support copy operation.
* This capability start with index of 32, so that it could leave gap between
* normal capability and ops capability.
*/
-#define RTE_DMA_CAPA_OPS_COPY RTE_BIT64(32)
+#define RTE_DMA_CAPA_OPS_COPY RTE_BIT64(32)
/** Support scatter-gather list copy operation. */
-#define RTE_DMA_CAPA_OPS_COPY_SG RTE_BIT64(33)
+#define RTE_DMA_CAPA_OPS_COPY_SG RTE_BIT64(33)
/** Support fill operation. */
-#define RTE_DMA_CAPA_OPS_FILL RTE_BIT64(34)
+#define RTE_DMA_CAPA_OPS_FILL RTE_BIT64(34)
+/** Support for source buffer free for mem to dev transfer. */
+#define RTE_DMA_CAPA_MEM_TO_DEV_SOURCE_BUFFER_FREE RTE_BIT64(35)
/**@}*/
/**
@@ -582,6 +584,16 @@ struct rte_dma_vchan_conf {
* @see struct rte_dma_port_param
*/
struct rte_dma_port_param dst_port;
+ /** mempool from which source buffer is allocated. mempool info is used
+ * for freeing source buffer by hardware when configured direction is
+ * RTE_DMA_DIR_MEM_TO_DEV. To free the source buffer by hardware,
+ * RTE_DMA_OP_FLAG_FREE_SBUF must be set while calling rte_dma_copy and
+ * rte_dma_copy_sg().
+ *
+ * @see RTE_DMA_OP_FLAG_FREE_SBUF
+ */
+ struct rte_mempool *mem_to_dev_src_buf_pool;
+
};
/**
@@ -808,17 +820,24 @@ struct rte_dma_sge {
* If the specify DMA HW works in-order (it means it has default fence between
* operations), this flag could be NOP.
*/
-#define RTE_DMA_OP_FLAG_FENCE RTE_BIT64(0)
+#define RTE_DMA_OP_FLAG_FENCE RTE_BIT64(0)
/** Submit flag.
* It means the operation with this flag must issue doorbell to hardware after
* enqueued jobs.
*/
-#define RTE_DMA_OP_FLAG_SUBMIT RTE_BIT64(1)
+#define RTE_DMA_OP_FLAG_SUBMIT RTE_BIT64(1)
/** Write data to low level cache hint.
* Used for performance optimization, this is just a hint, and there is no
* capability bit for this, driver should not return error if this flag was
set.
*/
-#define RTE_DMA_OP_FLAG_LLC RTE_BIT64(2)
+#define RTE_DMA_OP_FLAG_LLC RTE_BIT64(2)
+/** Mem to dev source buffer free flag.
+ * Used for freeing source DMA buffer by hardware when the transfer direction
is
+ * configured as RTE_DMA_DIR_MEM_TO_DEV.
+ *
+ * @see struct rte_dma_vchan_conf::mem_to_dev_src_buf_pool
+ */
+#define RTE_DMA_OP_FLAG_FREE_SBUF RTE_BIT64(3)
/**@}*/
/**
--
2.25.1
