From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shreyansh Jain Subject: [PATCH v7 13/17] pci: add a helper to update a device Date: Mon, 1 Aug 2016 16:15:28 +0530 Message-ID: <1470048332-27318-14-git-send-email-shreyansh.jain@nxp.com> References: <1466510566-9240-1-git-send-email-shreyansh.jain@nxp.com> <1470048332-27318-1-git-send-email-shreyansh.jain@nxp.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , David Marchand To: Return-path: Received: from NAM01-BY2-obe.outbound.protection.outlook.com (mail-by2nam01on0059.outbound.protection.outlook.com [104.47.34.59]) by dpdk.org (Postfix) with ESMTP id BC71C5921 for ; Mon, 1 Aug 2016 12:45:22 +0200 (CEST) In-Reply-To: <1470048332-27318-1-git-send-email-shreyansh.jain@nxp.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This helper updates a pci device object with latest information it can find. It will be used mainly for hotplug code. Signed-off-by: David Marchand Signed-off-by: Shreyansh Jain --- lib/librte_eal/bsdapp/eal/eal_pci.c | 49 +++++++++++++++++++++++++++++++++++ lib/librte_eal/common/eal_private.h | 13 ++++++++++ lib/librte_eal/linuxapp/eal/eal_pci.c | 13 ++++++++++ 3 files changed, 75 insertions(+) diff --git a/lib/librte_eal/bsdapp/eal/eal_pci.c b/lib/librte_eal/bsdapp/eal/eal_pci.c index a73cbb0..1d91c78 100644 --- a/lib/librte_eal/bsdapp/eal/eal_pci.c +++ b/lib/librte_eal/bsdapp/eal/eal_pci.c @@ -406,6 +406,55 @@ error: return -1; } +int +pci_update_device(const struct rte_pci_addr *addr) +{ + int fd; + struct pci_conf matches[2]; + struct pci_match_conf match = { + .pc_sel = { + .pc_domain = addr->domain, + .pc_bus = addr->bus, + .pc_dev = addr->devid, + .pc_func = addr->function, + }, + }; + struct pci_conf_io conf_io = { + .pat_buf_len = 0, + .num_patterns = 1, + .patterns = &match, + .match_buf_len = sizeof(matches), + .matches = &matches[0], + }; + + fd = open("/dev/pci", O_RDONLY); + if (fd < 0) { + RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__); + goto error; + } + + if (ioctl(fd, PCIOCGETCONF, &conf_io) < 0) { + RTE_LOG(ERR, EAL, "%s(): error with ioctl on /dev/pci: %s\n", + __func__, strerror(errno)); + goto error; + } + + if (conf_io.num_matches != 1) + goto error; + + if (pci_scan_one(fd, &matches[0]) < 0) + goto error; + + close(fd); + + return 0; + +error: + if (fd >= 0) + close(fd); + return -1; +} + /* Read PCI config space. */ int rte_eal_pci_read_config(const struct rte_pci_device *dev, void *buf, size_t len, off_t offset) diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h index 06a68f6..b8ff9c5 100644 --- a/lib/librte_eal/common/eal_private.h +++ b/lib/librte_eal/common/eal_private.h @@ -152,6 +152,19 @@ struct rte_pci_driver; struct rte_pci_device; /** + * Update a pci device object by asking the kernel for the latest information. + * + * This function is private to EAL. + * + * @param addr + * The PCI Bus-Device-Function address to look for + * @return + * - 0 on success. + * - negative on error. + */ +int pci_update_device(const struct rte_pci_addr *addr); + +/** * Unbind kernel driver for this device * * This function is private to EAL. diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c index f0215ee..62da4d4 100644 --- a/lib/librte_eal/linuxapp/eal/eal_pci.c +++ b/lib/librte_eal/linuxapp/eal/eal_pci.c @@ -417,6 +417,19 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus, return 0; } +int +pci_update_device(const struct rte_pci_addr *addr) +{ + char filename[PATH_MAX]; + + snprintf(filename, sizeof(filename), "%s/" PCI_PRI_FMT, + pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid, + addr->function); + + return pci_scan_one(filename, addr->domain, addr->bus, addr->devid, + addr->function); +} + /* * split up a pci address into its constituent parts. */ -- 2.7.4