New upstream version 16.11.7

[deb_dpdk.git] / lib / librte_eal / common / include / rte_dev.h

diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h
index f1b5507..2ad6da8 100644 (file)
--- a/lib/librte_eal/common/include/rte_dev.h
+++ b/lib/librte_eal/common/include/rte_dev.h
@@ -49,6 +49,7 @@ extern "C" {
 #include <stdio.h>
 #include <sys/queue.h>
 
+#include <rte_config.h>
 #include <rte_log.h>
 
 __attribute__((format(printf, 2, 0)))
@@ -59,17 +60,33 @@ rte_pmd_debug_trace(const char *func_name, const char *fmt, ...)
 
        va_start(ap, fmt);
 
-       char buffer[vsnprintf(NULL, 0, fmt, ap) + 1];
+       {
+               char buffer[vsnprintf(NULL, 0, fmt, ap) + 1];
 
-       va_end(ap);
+               va_end(ap);
 
-       va_start(ap, fmt);
-       vsnprintf(buffer, sizeof(buffer), fmt, ap);
-       va_end(ap);
+               va_start(ap, fmt);
+               vsnprintf(buffer, sizeof(buffer), fmt, ap);
+               va_end(ap);
 
-       rte_log(RTE_LOG_ERR, RTE_LOGTYPE_PMD, "%s: %s", func_name, buffer);
+               rte_log(RTE_LOG_ERR, RTE_LOGTYPE_PMD, "%s: %s",
+                       func_name, buffer);
+       }
 }
 
+/*
+ * Enable RTE_PMD_DEBUG_TRACE() when at least one component relying on the
+ * RTE_*_RET() macros defined below is compiled in debug mode.
+ */
+#if defined(RTE_LIBRTE_ETHDEV_DEBUG) || \
+       defined(RTE_LIBRTE_CRYPTODEV_DEBUG) || \
+       defined(RTE_LIBRTE_EVENTDEV_DEBUG)
+#define RTE_PMD_DEBUG_TRACE(...) \
+       rte_pmd_debug_trace(__func__, __VA_ARGS__)
+#else
+#define RTE_PMD_DEBUG_TRACE(...) (void)0
+#endif
+
 /* Macros for checking for restricting functions to primary instance only */
 #define RTE_PROC_PRIMARY_OR_ERR_RET(retval) do { \
        if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
@@ -100,37 +117,56 @@ rte_pmd_debug_trace(const char *func_name, const char *fmt, ...)
        } \
 } while (0)
 
+/**
+ * A generic memory resource representation.
+ */
+struct rte_mem_resource {
+       uint64_t phys_addr; /**< Physical address, 0 if not resource. */
+       uint64_t len;       /**< Length of the resource. */
+       void *addr;         /**< Virtual address, NULL when not mapped. */
+};
 
 /** Double linked list of device drivers. */
 TAILQ_HEAD(rte_driver_list, rte_driver);
+/** Double linked list of devices. */
+TAILQ_HEAD(rte_device_list, rte_device);
+
+/* Forward declaration */
+struct rte_driver;
 
 /**
- * Initialization function called for each device driver once.
+ * A structure describing a generic device.
  */
-typedef int (rte_dev_init_t)(const char *name, const char *args);
+struct rte_device {
+       TAILQ_ENTRY(rte_device) next; /**< Next device */
+       struct rte_driver *driver;    /**< Associated driver */
+       int numa_node;                /**< NUMA node connection */
+       struct rte_devargs *devargs;  /**< Device user arguments */
+};
 
 /**
- * Uninitilization function called for each device driver once.
+ * Insert a device detected by a bus scanning.
+ *
+ * @param dev
+ *   A pointer to a rte_device structure describing the detected device.
  */
-typedef int (rte_dev_uninit_t)(const char *name);
+void rte_eal_device_insert(struct rte_device *dev);
 
 /**
- * Driver type enumeration
+ * Remove a device (e.g. when being unplugged).
+ *
+ * @param dev
+ *   A pointer to a rte_device structure describing the device to be removed.
  */
-enum pmd_type {
-       PMD_VDEV = 0,
-       PMD_PDEV = 1,
-};
+void rte_eal_device_remove(struct rte_device *dev);
 
 /**
  * A structure describing a device driver.
  */
 struct rte_driver {
        TAILQ_ENTRY(rte_driver) next;  /**< Next in list. */
-       enum pmd_type type;                /**< PMD Driver type */
        const char *name;                   /**< Driver name. */
-       rte_dev_init_t *init;              /**< Device init. function. */
-       rte_dev_uninit_t *uninit;          /**< Device uninit. function. */
+       const char *alias;              /**< Driver alias. */
 };
 
 /**
@@ -178,12 +214,47 @@ int rte_eal_vdev_init(const char *name, const char *args);
  */
 int rte_eal_vdev_uninit(const char *name);
 
-#define PMD_REGISTER_DRIVER(d)\
-void devinitfn_ ##d(void);\
-void __attribute__((constructor, used)) devinitfn_ ##d(void)\
-{\
-       rte_eal_driver_register(&d);\
-}
+/**
+ * Attach a device to a registered driver.
+ *
+ * @param name
+ *   The device name, that refers to a pci device (or some private
+ *   way of designating a vdev device). Based on this device name, eal
+ *   will identify a driver capable of handling it and pass it to the
+ *   driver probing function.
+ * @param devargs
+ *   Device arguments to be passed to the driver.
+ * @return
+ *   0 on success, negative on error.
+ */
+int rte_eal_dev_attach(const char *name, const char *devargs);
+
+/**
+ * Detach a device from its driver.
+ *
+ * @param name
+ *   Same description as for rte_eal_dev_attach().
+ *   Here, eal will call the driver detaching function.
+ * @return
+ *   0 on success, negative on error.
+ */
+int rte_eal_dev_detach(const char *name);
+
+#define RTE_PMD_EXPORT_NAME_ARRAY(n, idx) n##idx[]
+
+#define RTE_PMD_EXPORT_NAME(name, idx) \
+static const char RTE_PMD_EXPORT_NAME_ARRAY(this_pmd_name, idx) \
+__attribute__((used)) = RTE_STR(name)
+
+#define DRV_EXP_TAG(name, tag) __##name##_##tag
+
+#define RTE_PMD_REGISTER_PCI_TABLE(name, table) \
+static const char DRV_EXP_TAG(name, pci_tbl_export)[] __attribute__((used)) = \
+RTE_STR(table)
+
+#define RTE_PMD_REGISTER_PARAM_STRING(name, str) \
+static const char DRV_EXP_TAG(name, param_string_export)[] \
+__attribute__((used)) = str
 
 #ifdef __cplusplus
 }