X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fbus%2Fpci%2Frte_bus_pci.h;h=fdda0465157ab0407cc3619875bd96c54496d928;hb=a65a34a85ebf5ee6dda53d680393b0342ff7fdb9;hp=2ed2f5053b1d8196715611b17ae2b67d8481d440;hpb=44c976236e68b83d8122a6f5d3ae5f5aff0c72e5;p=dpdk.git

diff --git a/drivers/bus/pci/rte_bus_pci.h b/drivers/bus/pci/rte_bus_pci.h
index 2ed2f5053b..fdda046515 100644
--- a/drivers/bus/pci/rte_bus_pci.h
+++ b/drivers/bus/pci/rte_bus_pci.h
@@ -51,6 +51,15 @@ TAILQ_HEAD(rte_pci_driver_list, rte_pci_driver);
 
 struct rte_devargs;
 
+enum rte_pci_kernel_driver {
+	RTE_PCI_KDRV_UNKNOWN = 0,
+	RTE_PCI_KDRV_IGB_UIO,
+	RTE_PCI_KDRV_VFIO,
+	RTE_PCI_KDRV_UIO_GENERIC,
+	RTE_PCI_KDRV_NIC_UIO,
+	RTE_PCI_KDRV_NONE,
+};
+
 /**
  * A structure describing a PCI device.
  */
@@ -62,9 +71,9 @@ struct rte_pci_device {
 	struct rte_mem_resource mem_resource[PCI_MAX_RESOURCE];
 					    /**< PCI Memory Resource */
 	struct rte_intr_handle intr_handle; /**< Interrupt handle */
-	struct rte_pci_driver *driver;      /**< Associated driver */
+	struct rte_pci_driver *driver;      /**< PCI driver used in probing */
 	uint16_t max_vfs;                   /**< sriov enable if not zero */
-	enum rte_kernel_driver kdrv;        /**< Kernel driver passthrough */
+	enum rte_pci_kernel_driver kdrv;    /**< Kernel driver passthrough */
 	char name[PCI_PRI_STR_SIZE+1];      /**< PCI location (ASCII) */
 	struct rte_intr_handle vfio_req_intr_handle;
 				/**< Handler of VFIO request interrupt */
@@ -113,6 +122,44 @@ typedef int (pci_probe_t)(struct rte_pci_driver *, struct rte_pci_device *);
  */
 typedef int (pci_remove_t)(struct rte_pci_device *);
 
+/**
+ * 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 PCI 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 (pci_dma_map_t)(struct rte_pci_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 PCI 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 (pci_dma_unmap_t)(struct rte_pci_device *dev, void *addr,
+			      uint64_t iova, size_t len);
+
 /**
  * A structure describing a PCI driver.
  */
@@ -122,8 +169,10 @@ struct rte_pci_driver {
 	struct rte_pci_bus *bus;           /**< PCI bus reference. */
 	pci_probe_t *probe;                /**< Device Probe function. */
 	pci_remove_t *remove;              /**< Device Remove function. */
+	pci_dma_map_t *dma_map;		   /**< device dma map function. */
+	pci_dma_unmap_t *dma_unmap;	   /**< device dma unmap function. */
 	const struct rte_pci_id *id_table; /**< ID table, NULL terminated. */
-	uint32_t drv_flags;                /**< Flags contolling handling of device. */
+	uint32_t drv_flags;                /**< Flags RTE_PCI_DRV_*. */
 };
 
 /**
@@ -139,14 +188,16 @@ struct rte_pci_bus {
 #define RTE_PCI_DRV_NEED_MAPPING 0x0001
 /** Device needs PCI BAR mapping with enabled write combining (wc) */
 #define RTE_PCI_DRV_WC_ACTIVATE 0x0002
+/** Device already probed can be probed again to check for new ports. */
+#define RTE_PCI_DRV_PROBE_AGAIN 0x0004
 /** Device driver supports link state interrupt */
 #define RTE_PCI_DRV_INTR_LSC	0x0008
 /** Device driver supports device removal interrupt */
 #define RTE_PCI_DRV_INTR_RMV 0x0010
 /** Device driver needs to keep mapped resources if unsupported dev detected */
 #define RTE_PCI_DRV_KEEP_MAPPED_RES 0x0020
-/** Device driver supports IOVA as VA */
-#define RTE_PCI_DRV_IOVA_AS_VA 0X0040
+/** Device driver needs IOVA as VA and cannot work with IOVA as PA */
+#define RTE_PCI_DRV_NEED_IOVA_AS_VA 0x0040
 
 /**
  * Map the PCI device resources in user space virtual memory address
@@ -182,6 +233,25 @@ void rte_pci_unmap_device(struct rte_pci_device *dev);
  */
 void rte_pci_dump(FILE *f);
 
+/**
+ * Find device's extended PCI capability.
+ *
+ *  @param dev
+ *    A pointer to rte_pci_device structure.
+ *
+ *  @param cap
+ *    Extended capability to be found, which can be any from
+ *    RTE_PCI_EXT_CAP_ID_*, defined in librte_pci.
+ *
+ *  @return
+ *  > 0: The offset of the next matching extended capability structure
+ *       within the device's PCI configuration space.
+ *  < 0: An error in PCI config space read.
+ *  = 0: Device does not support it.
+ */
+__rte_experimental
+off_t rte_pci_find_ext_capability(struct rte_pci_device *dev, uint32_t cap);
+
 /**
  * Register a PCI driver.
  *
@@ -221,6 +291,8 @@ void rte_pci_unregister(struct rte_pci_driver *driver);
  *   The length of the data buffer.
  * @param offset
  *   The offset into PCI config space
+ * @return
+ *  Number of bytes read on success, negative on error.
  */
 int rte_pci_read_config(const struct rte_pci_device *device,
 		void *buf, size_t len, off_t offset);