From: Jerin Jacob Date: Tue, 6 Dec 2016 02:24:15 +0000 (+0530) Subject: eventdev: implement PMD registration functions X-Git-Tag: spdx-start~3874 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=322d0345c2bc;p=dpdk.git eventdev: implement PMD registration functions This patch adds infrastructure for registering the vdev or the PCI based event device. Signed-off-by: Jerin Jacob Acked-by: Bruce Richardson --- diff --git a/lib/librte_eventdev/rte_eventdev.c b/lib/librte_eventdev/rte_eventdev.c index b13eb00ce2..c8f3e944df 100644 --- a/lib/librte_eventdev/rte_eventdev.c +++ b/lib/librte_eventdev/rte_eventdev.c @@ -126,6 +126,8 @@ rte_event_dev_info_get(uint8_t dev_id, struct rte_event_dev_info *dev_info) dev_info->dequeue_timeout_ns = dev->data->dev_conf.dequeue_timeout_ns; dev_info->pci_dev = dev->pci_dev; + if (dev->driver) + dev_info->driver_name = dev->driver->pci_drv.driver.name; return 0; } @@ -984,3 +986,237 @@ rte_event_dev_close(uint8_t dev_id) return (*dev->dev_ops->dev_close)(dev); } + +static inline int +rte_eventdev_data_alloc(uint8_t dev_id, struct rte_eventdev_data **data, + int socket_id) +{ + char mz_name[RTE_EVENTDEV_NAME_MAX_LEN]; + const struct rte_memzone *mz; + int n; + + /* Generate memzone name */ + n = snprintf(mz_name, sizeof(mz_name), "rte_eventdev_data_%u", dev_id); + if (n >= (int)sizeof(mz_name)) + return -EINVAL; + + if (rte_eal_process_type() == RTE_PROC_PRIMARY) { + mz = rte_memzone_reserve(mz_name, + sizeof(struct rte_eventdev_data), + socket_id, 0); + } else + mz = rte_memzone_lookup(mz_name); + + if (mz == NULL) + return -ENOMEM; + + *data = mz->addr; + if (rte_eal_process_type() == RTE_PROC_PRIMARY) + memset(*data, 0, sizeof(struct rte_eventdev_data)); + + return 0; +} + +static inline uint8_t +rte_eventdev_find_free_device_index(void) +{ + uint8_t dev_id; + + for (dev_id = 0; dev_id < RTE_EVENT_MAX_DEVS; dev_id++) { + if (rte_eventdevs[dev_id].attached == + RTE_EVENTDEV_DETACHED) + return dev_id; + } + return RTE_EVENT_MAX_DEVS; +} + +struct rte_eventdev * +rte_event_pmd_allocate(const char *name, int socket_id) +{ + struct rte_eventdev *eventdev; + uint8_t dev_id; + + if (rte_event_pmd_get_named_dev(name) != NULL) { + RTE_EDEV_LOG_ERR("Event device with name %s already " + "allocated!", name); + return NULL; + } + + dev_id = rte_eventdev_find_free_device_index(); + if (dev_id == RTE_EVENT_MAX_DEVS) { + RTE_EDEV_LOG_ERR("Reached maximum number of event devices"); + return NULL; + } + + eventdev = &rte_eventdevs[dev_id]; + + if (eventdev->data == NULL) { + struct rte_eventdev_data *eventdev_data = NULL; + + int retval = rte_eventdev_data_alloc(dev_id, &eventdev_data, + socket_id); + + if (retval < 0 || eventdev_data == NULL) + return NULL; + + eventdev->data = eventdev_data; + + snprintf(eventdev->data->name, RTE_EVENTDEV_NAME_MAX_LEN, + "%s", name); + + eventdev->data->dev_id = dev_id; + eventdev->data->socket_id = socket_id; + eventdev->data->dev_started = 0; + + eventdev->attached = RTE_EVENTDEV_ATTACHED; + + eventdev_globals.nb_devs++; + } + + return eventdev; +} + +int +rte_event_pmd_release(struct rte_eventdev *eventdev) +{ + int ret; + + if (eventdev == NULL) + return -EINVAL; + + ret = rte_event_dev_close(eventdev->data->dev_id); + if (ret < 0) + return ret; + + eventdev->attached = RTE_EVENTDEV_DETACHED; + eventdev_globals.nb_devs--; + eventdev->data = NULL; + + return 0; +} + +struct rte_eventdev * +rte_event_pmd_vdev_init(const char *name, size_t dev_private_size, + int socket_id) +{ + struct rte_eventdev *eventdev; + + /* Allocate device structure */ + eventdev = rte_event_pmd_allocate(name, socket_id); + if (eventdev == NULL) + return NULL; + + /* Allocate private device structure */ + if (rte_eal_process_type() == RTE_PROC_PRIMARY) { + eventdev->data->dev_private = + rte_zmalloc_socket("eventdev device private", + dev_private_size, + RTE_CACHE_LINE_SIZE, + socket_id); + + if (eventdev->data->dev_private == NULL) + rte_panic("Cannot allocate memzone for private device" + " data"); + } + + return eventdev; +} + +int +rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv, + struct rte_pci_device *pci_dev) +{ + struct rte_eventdev_driver *eventdrv; + struct rte_eventdev *eventdev; + + char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN]; + + int retval; + + eventdrv = (struct rte_eventdev_driver *)pci_drv; + if (eventdrv == NULL) + return -ENODEV; + + rte_eal_pci_device_name(&pci_dev->addr, eventdev_name, + sizeof(eventdev_name)); + + eventdev = rte_event_pmd_allocate(eventdev_name, + pci_dev->device.numa_node); + if (eventdev == NULL) + return -ENOMEM; + + if (rte_eal_process_type() == RTE_PROC_PRIMARY) { + eventdev->data->dev_private = + rte_zmalloc_socket( + "eventdev private structure", + eventdrv->dev_private_size, + RTE_CACHE_LINE_SIZE, + rte_socket_id()); + + if (eventdev->data->dev_private == NULL) + rte_panic("Cannot allocate memzone for private " + "device data"); + } + + eventdev->pci_dev = pci_dev; + eventdev->driver = eventdrv; + + /* Invoke PMD device initialization function */ + retval = (*eventdrv->eventdev_init)(eventdev); + if (retval == 0) + return 0; + + RTE_EDEV_LOG_ERR("driver %s: (vendor_id=0x%x device_id=0x%x)" + " failed", pci_drv->driver.name, + (unsigned int) pci_dev->id.vendor_id, + (unsigned int) pci_dev->id.device_id); + + if (rte_eal_process_type() == RTE_PROC_PRIMARY) + rte_free(eventdev->data->dev_private); + + eventdev->attached = RTE_EVENTDEV_DETACHED; + eventdev_globals.nb_devs--; + + return -ENXIO; +} + +int +rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev) +{ + const struct rte_eventdev_driver *eventdrv; + struct rte_eventdev *eventdev; + char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN]; + int ret; + + if (pci_dev == NULL) + return -EINVAL; + + rte_eal_pci_device_name(&pci_dev->addr, eventdev_name, + sizeof(eventdev_name)); + + eventdev = rte_event_pmd_get_named_dev(eventdev_name); + if (eventdev == NULL) + return -ENODEV; + + eventdrv = (const struct rte_eventdev_driver *)pci_dev->driver; + if (eventdrv == NULL) + return -ENODEV; + + /* Invoke PMD device un-init function */ + if (*eventdrv->eventdev_uninit) { + ret = (*eventdrv->eventdev_uninit)(eventdev); + if (ret) + return ret; + } + + /* Free event device */ + rte_event_pmd_release(eventdev); + + if (rte_eal_process_type() == RTE_PROC_PRIMARY) + rte_free(eventdev->data->dev_private); + + eventdev->pci_dev = NULL; + eventdev->driver = NULL; + + return 0; +} diff --git a/lib/librte_eventdev/rte_eventdev_pmd.h b/lib/librte_eventdev/rte_eventdev_pmd.h index e60eca9763..c84c9a22a4 100644 --- a/lib/librte_eventdev/rte_eventdev_pmd.h +++ b/lib/librte_eventdev/rte_eventdev_pmd.h @@ -92,6 +92,60 @@ extern "C" { #define RTE_EVENTDEV_DETACHED (0) #define RTE_EVENTDEV_ATTACHED (1) +/** + * Initialisation function of a event driver invoked for each matching + * event PCI device detected during the PCI probing phase. + * + * @param dev + * The dev pointer is the address of the *rte_eventdev* structure associated + * with the matching device and which has been [automatically] allocated in + * the *rte_event_devices* array. + * + * @return + * - 0: Success, the device is properly initialised by the driver. + * In particular, the driver MUST have set up the *dev_ops* pointer + * of the *dev* structure. + * - <0: Error code of the device initialisation failure. + */ +typedef int (*eventdev_init_t)(struct rte_eventdev *dev); + +/** + * Finalisation function of a driver invoked for each matching + * PCI device detected during the PCI closing phase. + * + * @param dev + * The dev pointer is the address of the *rte_eventdev* structure associated + * with the matching device and which has been [automatically] allocated in + * the *rte_event_devices* array. + * + * @return + * - 0: Success, the device is properly finalised by the driver. + * In particular, the driver MUST free the *dev_ops* pointer + * of the *dev* structure. + * - <0: Error code of the device initialisation failure. + */ +typedef int (*eventdev_uninit_t)(struct rte_eventdev *dev); + +/** + * The structure associated with a PMD driver. + * + * Each driver acts as a PCI driver and is represented by a generic + * *event_driver* structure that holds: + * + * - An *rte_pci_driver* structure (which must be the first field). + * + * - The *eventdev_init* function invoked for each matching PCI device. + * + * - The size of the private data to allocate for each matching device. + */ +struct rte_eventdev_driver { + struct rte_pci_driver pci_drv; /**< The PMD is also a PCI driver. */ + unsigned int dev_private_size; /**< Size of device private data. */ + + eventdev_init_t eventdev_init; /**< Device init function. */ + eventdev_uninit_t eventdev_uninit; /**< Device uninit function. */ +}; + /** Global structure used for maintaining state of allocated event devices */ struct rte_eventdev_global { uint8_t nb_devs; /**< Number of devices found */ @@ -396,6 +450,63 @@ struct rte_eventdev_ops { /* Dump internal information */ }; +/** + * Allocates a new eventdev slot for an event device and returns the pointer + * to that slot for the driver to use. + * + * @param name + * Unique identifier name for each device + * @param socket_id + * Socket to allocate resources on. + * @return + * - Slot in the rte_dev_devices array for a new device; + */ +struct rte_eventdev * +rte_event_pmd_allocate(const char *name, int socket_id); + +/** + * Release the specified eventdev device. + * + * @param eventdev + * The *eventdev* pointer is the address of the *rte_eventdev* structure. + * @return + * - 0 on success, negative on error + */ +int +rte_event_pmd_release(struct rte_eventdev *eventdev); + +/** + * Creates a new virtual event device and returns the pointer to that device. + * + * @param name + * PMD type name + * @param dev_private_size + * Size of event PMDs private data + * @param socket_id + * Socket to allocate resources on. + * + * @return + * - Eventdev pointer if device is successfully created. + * - NULL if device cannot be created. + */ +struct rte_eventdev * +rte_event_pmd_vdev_init(const char *name, size_t dev_private_size, + int socket_id); + + +/** + * Wrapper for use by pci drivers as a .probe function to attach to a event + * interface. + */ +int rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv, + struct rte_pci_device *pci_dev); + +/** + * Wrapper for use by pci drivers as a .remove function to detach a event + * interface. + */ +int rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev); + #ifdef __cplusplus } #endif diff --git a/lib/librte_eventdev/rte_eventdev_version.map b/lib/librte_eventdev/rte_eventdev_version.map index 45072db31f..f4a39c4433 100644 --- a/lib/librte_eventdev/rte_eventdev_version.map +++ b/lib/librte_eventdev/rte_eventdev_version.map @@ -29,5 +29,11 @@ DPDK_17.05 { rte_event_dequeue_timeout_ticks; + rte_event_pmd_allocate; + rte_event_pmd_release; + rte_event_pmd_vdev_init; + rte_event_pmd_pci_probe; + rte_event_pmd_pci_remove; + local: *; };