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[219.106.231.132]) by mx.google.com with ESMTPSA id g7sm13769979pdm.4.2015.02.19.22.40.12 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 19 Feb 2015 22:40:14 -0800 (PST) From: Tetsuya Mukawa To: dev@dpdk.org Date: Fri, 20 Feb 2015 15:39:41 +0900 Message-Id: <1424414390-18509-8-git-send-email-mukawa@igel.co.jp> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1424414390-18509-1-git-send-email-mukawa@igel.co.jp> References: <1424060073-23484-2-git-send-email-mukawa@igel.co.jp> <1424414390-18509-1-git-send-email-mukawa@igel.co.jp> Subject: [dpdk-dev] [PATCH v10 07/14] eal, ethdev: Add a function and function pointers to close ether device X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Feb 2015 06:40:16 -0000 The patch adds function pointer to rte_pci_driver and eth_driver structure. These function pointers are used when ports are detached. Also, the patch adds rte_eth_dev_uninit(). So far, it's not called by anywhere, but it will be called when port hotplug function is implemented. v10: - Add size parameter to rte_eth_dev_create_unique_device_name(). (Thanks to Iremonger, Bernard) v9: - Change parameter of pci_devuninit_t and rte_eth_dev_uninit. - Remove code that initiaize callback of ethdev from rte_eth_dev_uninit(). - Add a function to create a unique device name. (Thanks to Thomas Monjalon) v6: - Fix rte_eth_dev_uninit() to handle a return value of uninit function of PMD. v4: - Add parameter checking. - Change function names. Signed-off-by: Tetsuya Mukawa --- lib/librte_eal/common/include/rte_pci.h | 6 ++++ lib/librte_ether/rte_ethdev.c | 64 +++++++++++++++++++++++++++++++-- lib/librte_ether/rte_ethdev.h | 24 +++++++++++++ 3 files changed, 92 insertions(+), 2 deletions(-) diff --git a/lib/librte_eal/common/include/rte_pci.h b/lib/librte_eal/common/include/rte_pci.h index c609ef3..376f66a 100644 --- a/lib/librte_eal/common/include/rte_pci.h +++ b/lib/librte_eal/common/include/rte_pci.h @@ -189,12 +189,18 @@ struct rte_pci_driver; typedef int (pci_devinit_t)(struct rte_pci_driver *, struct rte_pci_device *); /** + * Uninitialisation function for the driver called during hotplugging. + */ +typedef int (pci_devuninit_t)(struct rte_pci_device *); + +/** * A structure describing a PCI driver. */ struct rte_pci_driver { TAILQ_ENTRY(rte_pci_driver) next; /**< Next in list. */ const char *name; /**< Driver name. */ pci_devinit_t *devinit; /**< Device init. function. */ + pci_devuninit_t *devuninit; /**< Device uninit function. */ struct rte_pci_id *id_table; /**< ID table, NULL terminated. */ uint32_t drv_flags; /**< Flags contolling handling of device. */ }; diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c index 72eed1b..bdb5a7b 100644 --- a/lib/librte_ether/rte_ethdev.c +++ b/lib/librte_ether/rte_ethdev.c @@ -266,6 +266,24 @@ rte_eth_dev_release_port(struct rte_eth_dev *eth_dev) return 0; } +static inline int +rte_eth_dev_create_unique_device_name(char *name, size_t size, + struct rte_pci_device *pci_dev) +{ + int ret; + + if ((name == NULL) || (pci_dev == NULL)) + return -EINVAL; + + ret = snprintf(name, size, "%d:%d.%d", + pci_dev->addr.bus, pci_dev->addr.devid, + pci_dev->addr.function); + if (ret < 0) + return ret; + + return 0; +} + static int rte_eth_dev_init(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev) @@ -279,8 +297,8 @@ rte_eth_dev_init(struct rte_pci_driver *pci_drv, eth_drv = (struct eth_driver *)pci_drv; /* Create unique Ethernet device name using PCI address */ - snprintf(ethdev_name, RTE_ETH_NAME_MAX_LEN, "%d:%d.%d", - pci_dev->addr.bus, pci_dev->addr.devid, pci_dev->addr.function); + rte_eth_dev_create_unique_device_name(ethdev_name, + sizeof(ethdev_name), pci_dev); eth_dev = rte_eth_dev_allocate(ethdev_name); if (eth_dev == NULL) @@ -321,6 +339,47 @@ rte_eth_dev_init(struct rte_pci_driver *pci_drv, return diag; } +static int +rte_eth_dev_uninit(struct rte_pci_device *pci_dev) +{ + const struct eth_driver *eth_drv; + struct rte_eth_dev *eth_dev; + char ethdev_name[RTE_ETH_NAME_MAX_LEN]; + int ret; + + if (pci_dev == NULL) + return -EINVAL; + + /* Create unique Ethernet device name using PCI address */ + rte_eth_dev_create_unique_device_name(ethdev_name, + sizeof(ethdev_name), pci_dev); + + eth_dev = rte_eth_dev_allocated(ethdev_name); + if (eth_dev == NULL) + return -ENODEV; + + eth_drv = (const struct eth_driver *)pci_dev->driver; + + /* Invoke PMD device uninit function */ + if (*eth_drv->eth_dev_uninit) { + ret = (*eth_drv->eth_dev_uninit)(eth_drv, eth_dev); + if (ret) + return ret; + } + + /* free ether device */ + rte_eth_dev_release_port(eth_dev); + + if (rte_eal_process_type() == RTE_PROC_PRIMARY) + rte_free(eth_dev->data->dev_private); + + eth_dev->pci_dev = NULL; + eth_dev->driver = NULL; + eth_dev->data = NULL; + + return 0; +} + /** * Register an Ethernet [Poll Mode] driver. * @@ -339,6 +398,7 @@ void rte_eth_driver_register(struct eth_driver *eth_drv) { eth_drv->pci_drv.devinit = rte_eth_dev_init; + eth_drv->pci_drv.devuninit = rte_eth_dev_uninit; rte_eal_pci_register(ð_drv->pci_drv); } diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h index cd210eb..fa3ecab 100644 --- a/lib/librte_ether/rte_ethdev.h +++ b/lib/librte_ether/rte_ethdev.h @@ -1677,6 +1677,27 @@ typedef int (*eth_dev_init_t)(struct eth_driver *eth_drv, /** * @internal + * Finalization function of an Ethernet driver invoked for each matching + * Ethernet PCI device detected during the PCI closing phase. + * + * @param eth_drv + * The pointer to the [matching] Ethernet driver structure supplied by + * the PMD when it registered itself. + * @param eth_dev + * The *eth_dev* pointer is the address of the *rte_eth_dev* structure + * associated with the matching device and which have been [automatically] + * allocated in the *rte_eth_devices* array. + * @return + * - 0: Success, the device is properly finalized by the driver. + * In particular, the driver MUST free the *dev_ops* pointer + * of the *eth_dev* structure. + * - <0: Error code of the device initialization failure. + */ +typedef int (*eth_dev_uninit_t)(const struct eth_driver *eth_drv, + struct rte_eth_dev *eth_dev); + +/** + * @internal * The structure associated with a PMD Ethernet driver. * * Each Ethernet driver acts as a PCI driver and is represented by a generic @@ -1686,11 +1707,14 @@ typedef int (*eth_dev_init_t)(struct eth_driver *eth_drv, * * - The *eth_dev_init* function invoked for each matching PCI device. * + * - The *eth_dev_uninit* function invoked for each matching PCI device. + * * - The size of the private data to allocate for each matching device. */ struct eth_driver { struct rte_pci_driver pci_drv; /**< The PMD is also a PCI driver. */ eth_dev_init_t eth_dev_init; /**< Device init function. */ + eth_dev_uninit_t eth_dev_uninit; /**< Device uninit function. */ unsigned int dev_private_size; /**< Size of device private data. */ }; -- 1.9.1