X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Fdmadev%2Frte_dmadev.h;h=f5d23017b161a994a54750b0a8ca7e71a843265d;hb=28dde5da503ed09f10cdfb295e390b114df7330a;hp=e35aca7d1c7c9d2d2cf436cfca85e4342f4c8b83;hpb=5e0f85912754bf0d50c940165c40cac68e7c762f;p=dpdk.git

diff --git a/lib/dmadev/rte_dmadev.h b/lib/dmadev/rte_dmadev.h
index e35aca7d1c..f5d23017b1 100644
--- a/lib/dmadev/rte_dmadev.h
+++ b/lib/dmadev/rte_dmadev.h
@@ -220,6 +220,24 @@ bool rte_dma_is_valid(int16_t dev_id);
 __rte_experimental
 uint16_t rte_dma_count_avail(void);
 
+/**
+ * Iterates over valid dmadev instances.
+ *
+ * @param start_dev_id
+ *   The id of the next possible dmadev.
+ * @return
+ *   Next valid dmadev, UINT16_MAX if there is none.
+ */
+__rte_experimental
+int16_t rte_dma_next_dev(int16_t start_dev_id);
+
+/** Utility macro to iterate over all available dmadevs */
+#define RTE_DMA_FOREACH_DEV(p) \
+	for (p = rte_dma_next_dev(0); \
+	     p != -1; \
+	     p = rte_dma_next_dev(p + 1))
+
+
 /**@{@name DMA capability
  * @see struct rte_dma_info::dev_capa
  */
@@ -244,6 +262,14 @@ uint16_t rte_dma_count_avail(void);
  * @see struct rte_dma_conf::silent_mode
  */
 #define RTE_DMA_CAPA_SILENT             RTE_BIT64(5)
+/** Supports error handling
+ *
+ * With this bit set, invalid input addresses will be reported as operation failures
+ * to the user but other operations can continue.
+ * 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)
 /** Support copy operation.
  * This capability start with index of 32, so that it could leave gap between
  * normal capability and ops capability.
@@ -1076,6 +1102,35 @@ rte_dma_completed_status(int16_t dev_id, uint16_t vchan,
 					last_idx, status);
 }
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Check remaining capacity in descriptor ring for the current burst.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ * @param vchan
+ *   The identifier of virtual DMA channel.
+ *
+ * @return
+ *   - Remaining space in the descriptor ring for the current burst.
+ *   - 0 on error
+ */
+__rte_experimental
+static inline uint16_t
+rte_dma_burst_capacity(int16_t dev_id, uint16_t vchan)
+{
+	struct rte_dma_fp_object *obj = &rte_dma_fp_objs[dev_id];
+
+#ifdef RTE_DMADEV_DEBUG
+	if (!rte_dma_is_valid(dev_id))
+		return 0;
+	RTE_FUNC_PTR_OR_ERR_RET(*obbj->burst_capacity, 0);
+#endif
+	return (*obj->burst_capacity)(obj->dev_private, vchan);
+}
+
 #ifdef __cplusplus
 }
 #endif