test: avoid hang if queues are full and Tx fails

[dpdk.git] / drivers / bus / vdev / rte_bus_vdev.h

diff --git a/drivers/bus/vdev/rte_bus_vdev.h b/drivers/bus/vdev/rte_bus_vdev.h
index 78a032c..5af6be0 100644 (file)
--- a/drivers/bus/vdev/rte_bus_vdev.h
+++ b/drivers/bus/vdev/rte_bus_vdev.h
@@ -15,12 +15,11 @@
 extern "C" {
 #endif
 
-#include <sys/queue.h>
 #include <rte_dev.h>
 #include <rte_devargs.h>
 
 struct rte_vdev_device {
-       TAILQ_ENTRY(rte_vdev_device) next;      /**< Next attached vdev */
+       RTE_TAILQ_ENTRY(rte_vdev_device) next;      /**< Next attached vdev */
        struct rte_device device;               /**< Inherit core device */
 };
 
@@ -34,6 +33,8 @@ struct rte_vdev_device {
 #define RTE_DEV_TO_VDEV_CONST(ptr) \
        container_of(ptr, const struct rte_vdev_device, device)
 
+#define RTE_ETH_DEV_TO_VDEV(eth_dev)   RTE_DEV_TO_VDEV((eth_dev)->device)
+
 static inline const char *
 rte_vdev_device_name(const struct rte_vdev_device *dev)
 {
@@ -51,7 +52,7 @@ rte_vdev_device_args(const struct rte_vdev_device *dev)
 }
 
 /** Double linked list of virtual device drivers. */
-TAILQ_HEAD(vdev_driver_list, rte_vdev_driver);
+RTE_TAILQ_HEAD(vdev_driver_list, rte_vdev_driver);
 
 /**
  * Probe function called for each virtual device driver once.
@@ -63,16 +64,60 @@ typedef int (rte_vdev_probe_t)(struct rte_vdev_device *dev);
  */
 typedef int (rte_vdev_remove_t)(struct rte_vdev_device *dev);
 
+/**
+ * Driver-specific DMA mapping. After a successful call the device
+ * will be able to read/write from/to this segment.
+ *
+ * @param dev
+ *   Pointer to the Virtual device.
+ * @param addr
+ *   Starting virtual address of memory to be mapped.
+ * @param iova
+ *   Starting IOVA address of memory to be mapped.
+ * @param len
+ *   Length of memory segment being mapped.
+ * @return
+ *   - 0 On success.
+ *   - Negative value and rte_errno is set otherwise.
+ */
+typedef int (rte_vdev_dma_map_t)(struct rte_vdev_device *dev, void *addr,
+                           uint64_t iova, size_t len);
+
+/**
+ * Driver-specific DMA un-mapping. After a successful call the device
+ * will not be able to read/write from/to this segment.
+ *
+ * @param dev
+ *   Pointer to the Virtual device.
+ * @param addr
+ *   Starting virtual address of memory to be unmapped.
+ * @param iova
+ *   Starting IOVA address of memory to be unmapped.
+ * @param len
+ *   Length of memory segment being unmapped.
+ * @return
+ *   - 0 On success.
+ *   - Negative value and rte_errno is set otherwise.
+ */
+typedef int (rte_vdev_dma_unmap_t)(struct rte_vdev_device *dev, void *addr,
+                             uint64_t iova, size_t len);
+
 /**
  * A virtual device driver abstraction.
  */
 struct rte_vdev_driver {
-       TAILQ_ENTRY(rte_vdev_driver) next; /**< Next in list. */
-       struct rte_driver driver;      /**< Inherited general driver. */
-       rte_vdev_probe_t *probe;       /**< Virtual device probe function. */
-       rte_vdev_remove_t *remove;     /**< Virtual device remove function. */
+       RTE_TAILQ_ENTRY(rte_vdev_driver) next; /**< Next in list. */
+       struct rte_driver driver;        /**< Inherited general driver. */
+       rte_vdev_probe_t *probe;         /**< Virtual device probe function. */
+       rte_vdev_remove_t *remove;       /**< Virtual device remove function. */
+       rte_vdev_dma_map_t *dma_map;     /**< Virtual device DMA map function. */
+       rte_vdev_dma_unmap_t *dma_unmap; /**< Virtual device DMA unmap function. */
+       uint32_t drv_flags;              /**< Flags RTE_VDEV_DRV_*. */
 };
 
+/** Device driver needs IOVA as VA and cannot work with IOVA as PA */
+#define RTE_VDEV_DRV_NEED_IOVA_AS_VA 0x0001
+
 /**
  * Register a virtual device driver.
  *
@@ -152,7 +197,7 @@ rte_vdev_remove_custom_scan(rte_vdev_scan_callback callback, void *user_arg);
 int rte_vdev_init(const char *name, const char *args);
 
 /**
- * Uninitalize a driver specified by name.
+ * Uninitialize a driver specified by name.
  *
  * @param name
  *   The pointer to a driver name to be uninitialized.