From patchwork Fri Jun 29 10:24:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 41939 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 569111B4F7; Fri, 29 Jun 2018 12:26:57 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 6743C1B4EF for ; Fri, 29 Jun 2018 12:26:55 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2018 03:26:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,285,1526367600"; d="scan'208";a="241324416" Received: from jeffguo-z170x-ud5.sh.intel.com (HELO localhost.localdomain) ([10.67.104.10]) by fmsmga005.fm.intel.com with ESMTP; 29 Jun 2018 03:26:51 -0700 From: Jeff Guo To: stephen@networkplumber.org, bruce.richardson@intel.com, ferruh.yigit@intel.com, konstantin.ananyev@intel.com, gaetan.rivet@6wind.com, jingjing.wu@intel.com, thomas@monjalon.net, motih@mellanox.com, matan@mellanox.com, harry.van.haaren@intel.com, qi.z.zhang@intel.com, shaopeng.he@intel.com, bernard.iremonger@intel.com Cc: jblunck@infradead.org, shreyansh.jain@nxp.com, dev@dpdk.org, jia.guo@intel.com, helin.zhang@intel.com Date: Fri, 29 Jun 2018 18:24:23 +0800 Message-Id: <1530267871-7161-2-git-send-email-jia.guo@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530267871-7161-1-git-send-email-jia.guo@intel.com> References: <1530267871-7161-1-git-send-email-jia.guo@intel.com> Subject: [dpdk-dev] [PATCH V4 1/9] bus: introduce hotplug failure handler X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" When a hardware device is removed physically or the software disables it, the hotplug occur. App need to call ether dev API to detach the device, to unplug the device at the bus level and make access to the device invalid. But the removal of the device from the software lists is not going to be instantaneous, at this time if the data path still read/write the device, it will cause MMIO error and result of the app crash out. So a hotplug failure handle mechanism need to be used to guaranty app will not crash out when hot unplug device. To handle device hot plug failure is a bus-specific behavior, this patch introduces a bus ops so that each kind of bus can implement its own logic. Signed-off-by: Jeff Guo --- v4->v3: split patches to be small and clear. --- lib/librte_eal/common/include/rte_bus.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h index eb9eded..3642aeb 100644 --- a/lib/librte_eal/common/include/rte_bus.h +++ b/lib/librte_eal/common/include/rte_bus.h @@ -168,6 +168,19 @@ typedef int (*rte_bus_unplug_t)(struct rte_device *dev); typedef int (*rte_bus_parse_t)(const char *name, void *addr); /** + * Implementation a specific hot plug handler, which is responsible + * for handle the failure when hot remove the device, guaranty the system + * would not crash in the case. + * @param dev + * Pointer of the device structure. + * + * @return + * 0 on success. + * !0 on error. + */ +typedef int (*rte_bus_hotplug_handler_t)(struct rte_device *dev); + +/** * Bus scan policies */ enum rte_bus_scan_mode { @@ -211,6 +224,8 @@ struct rte_bus { rte_bus_parse_t parse; /**< Parse a device name */ struct rte_bus_conf conf; /**< Bus configuration */ rte_bus_get_iommu_class_t get_iommu_class; /**< Get iommu class */ + rte_bus_hotplug_handler_t hotplug_handler; + /**< handle hot plug on bus */ }; /** From patchwork Fri Jun 29 10:24:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 41940 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 967DE1B505; Fri, 29 Jun 2018 12:27:01 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 40DB22D13 for ; Fri, 29 Jun 2018 12:26:58 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2018 03:26:57 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,285,1526367600"; d="scan'208";a="241324419" Received: from jeffguo-z170x-ud5.sh.intel.com (HELO localhost.localdomain) ([10.67.104.10]) by fmsmga005.fm.intel.com with ESMTP; 29 Jun 2018 03:26:55 -0700 From: Jeff Guo To: stephen@networkplumber.org, bruce.richardson@intel.com, ferruh.yigit@intel.com, konstantin.ananyev@intel.com, gaetan.rivet@6wind.com, jingjing.wu@intel.com, thomas@monjalon.net, motih@mellanox.com, matan@mellanox.com, harry.van.haaren@intel.com, qi.z.zhang@intel.com, shaopeng.he@intel.com, bernard.iremonger@intel.com Cc: jblunck@infradead.org, shreyansh.jain@nxp.com, dev@dpdk.org, jia.guo@intel.com, helin.zhang@intel.com Date: Fri, 29 Jun 2018 18:24:24 +0800 Message-Id: <1530267871-7161-3-git-send-email-jia.guo@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530267871-7161-1-git-send-email-jia.guo@intel.com> References: <1530267871-7161-1-git-send-email-jia.guo@intel.com> Subject: [dpdk-dev] [PATCH V4 2/9] bus/pci: implement hotplug handler operation X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch implements the ops of hotplug handler for PCI bus, it is functional to remap a new dummy memory which overlap to the failure memory to avoid MMIO read/write error. Signed-off-by: Jeff Guo --- v4->v3: split patches to be small and clear. --- drivers/bus/pci/pci_common.c | 28 ++++++++++++++++++++++++++++ drivers/bus/pci/pci_common_uio.c | 33 +++++++++++++++++++++++++++++++++ drivers/bus/pci/private.h | 12 ++++++++++++ 3 files changed, 73 insertions(+) diff --git a/drivers/bus/pci/pci_common.c b/drivers/bus/pci/pci_common.c index d8151b0..095cd4e 100644 --- a/drivers/bus/pci/pci_common.c +++ b/drivers/bus/pci/pci_common.c @@ -401,6 +401,33 @@ pci_find_device(const struct rte_device *start, rte_dev_cmp_t cmp, } static int +pci_hotplug_handler(struct rte_device *dev) +{ + struct rte_pci_device *pdev = NULL; + int ret = 0; + + pdev = RTE_DEV_TO_PCI(dev); + if (!pdev) + return -1; + + switch (pdev->kdrv) { + case RTE_KDRV_IGB_UIO: + case RTE_KDRV_UIO_GENERIC: + case RTE_KDRV_NIC_UIO: + /* mmio resources is invalid, remap it to be safe. */ + ret = pci_uio_remap_resource(pdev); + break; + default: + RTE_LOG(DEBUG, EAL, + "Not managed by a supported kernel driver, skipped\n"); + ret = -1; + break; + } + + return ret; +} + +static int pci_plug(struct rte_device *dev) { return pci_probe_all_drivers(RTE_DEV_TO_PCI(dev)); @@ -430,6 +457,7 @@ struct rte_pci_bus rte_pci_bus = { .unplug = pci_unplug, .parse = pci_parse, .get_iommu_class = rte_pci_get_iommu_class, + .hotplug_handler = pci_hotplug_handler, }, .device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list), .driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list), diff --git a/drivers/bus/pci/pci_common_uio.c b/drivers/bus/pci/pci_common_uio.c index 54bc20b..7ea73db 100644 --- a/drivers/bus/pci/pci_common_uio.c +++ b/drivers/bus/pci/pci_common_uio.c @@ -146,6 +146,39 @@ pci_uio_unmap(struct mapped_pci_resource *uio_res) } } +/* remap the PCI resource of a PCI device in anonymous virtual memory */ +int +pci_uio_remap_resource(struct rte_pci_device *dev) +{ + int i; + void *map_address; + + if (dev == NULL) + return -1; + + /* Remap all BARs */ + for (i = 0; i != PCI_MAX_RESOURCE; i++) { + /* skip empty BAR */ + if (dev->mem_resource[i].phys_addr == 0) + continue; + map_address = mmap(dev->mem_resource[i].addr, + (size_t)dev->mem_resource[i].len, + PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0); + if (map_address == MAP_FAILED) { + RTE_LOG(ERR, EAL, + "Cannot remap resource for device %s\n", + dev->name); + return -1; + } + RTE_LOG(INFO, EAL, + "Successful remap resource for device %s\n", + dev->name); + } + + return 0; +} + static struct mapped_pci_resource * pci_uio_find_resource(struct rte_pci_device *dev) { diff --git a/drivers/bus/pci/private.h b/drivers/bus/pci/private.h index 8ddd03e..6b312e5 100644 --- a/drivers/bus/pci/private.h +++ b/drivers/bus/pci/private.h @@ -123,6 +123,18 @@ void pci_uio_free_resource(struct rte_pci_device *dev, struct mapped_pci_resource *uio_res); /** + * Remap the PCI resource of a PCI device in anonymous virtual memory. + * + * @param dev + * Point to the struct rte pci device. + * @return + * - On success, zero. + * - On failure, a negative value. + */ +int +pci_uio_remap_resource(struct rte_pci_device *dev); + +/** * Map device memory to uio resource * * This function is private to EAL. From patchwork Fri Jun 29 10:24:25 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 41941 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id E69FE1B503; Fri, 29 Jun 2018 12:27:03 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 1B6751B503 for ; Fri, 29 Jun 2018 12:27:00 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2018 03:27:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,285,1526367600"; d="scan'208";a="241324424" Received: from jeffguo-z170x-ud5.sh.intel.com (HELO localhost.localdomain) ([10.67.104.10]) by fmsmga005.fm.intel.com with ESMTP; 29 Jun 2018 03:26:57 -0700 From: Jeff Guo To: stephen@networkplumber.org, bruce.richardson@intel.com, ferruh.yigit@intel.com, konstantin.ananyev@intel.com, gaetan.rivet@6wind.com, jingjing.wu@intel.com, thomas@monjalon.net, motih@mellanox.com, matan@mellanox.com, harry.van.haaren@intel.com, qi.z.zhang@intel.com, shaopeng.he@intel.com, bernard.iremonger@intel.com Cc: jblunck@infradead.org, shreyansh.jain@nxp.com, dev@dpdk.org, jia.guo@intel.com, helin.zhang@intel.com Date: Fri, 29 Jun 2018 18:24:25 +0800 Message-Id: <1530267871-7161-4-git-send-email-jia.guo@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530267871-7161-1-git-send-email-jia.guo@intel.com> References: <1530267871-7161-1-git-send-email-jia.guo@intel.com> Subject: [dpdk-dev] [PATCH V4 3/9] bus: introduce sigbus handler X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" When device be hotplug, if data path still read/write device, the sigbus error will occur, this error need to be handled. So a handler need to be here to capture the signal and handle it correspondingly. To handle sigbus error is a bus-specific behavior, this patch introduces a bus ops so that each kind of bus can implement its own logic. Signed-off-by: Jeff Guo --- v4->v3: split patches to be small and clear. --- lib/librte_eal/common/include/rte_bus.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h index 3642aeb..231bd3d 100644 --- a/lib/librte_eal/common/include/rte_bus.h +++ b/lib/librte_eal/common/include/rte_bus.h @@ -181,6 +181,20 @@ typedef int (*rte_bus_parse_t)(const char *name, void *addr); typedef int (*rte_bus_hotplug_handler_t)(struct rte_device *dev); /** + * Implementation a specific sigbus handler, which is responsible + * for handle the sigbus error which is original memory error, or specific + * memory error that caused of hot unplug. + * @param failure_addr + * Pointer of the fault address of the sigbus error. + * + * @return + * 0 for success handle the sigbus. + * 1 for no handle the sigbus. + * -1 for failed to handle the sigbus + */ +typedef int (*rte_bus_sigbus_handler_t)(const void *failure_addr); + +/** * Bus scan policies */ enum rte_bus_scan_mode { @@ -226,6 +240,8 @@ struct rte_bus { rte_bus_get_iommu_class_t get_iommu_class; /**< Get iommu class */ rte_bus_hotplug_handler_t hotplug_handler; /**< handle hot plug on bus */ + rte_bus_sigbus_handler_t sigbus_handler; /**< handle sigbus error */ + }; /** From patchwork Fri Jun 29 10:24:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 41942 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 255E91B522; Fri, 29 Jun 2018 12:27:07 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id F17FE1B518 for ; Fri, 29 Jun 2018 12:27:03 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2018 03:27:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,285,1526367600"; d="scan'208";a="241324438" Received: from jeffguo-z170x-ud5.sh.intel.com (HELO localhost.localdomain) ([10.67.104.10]) by fmsmga005.fm.intel.com with ESMTP; 29 Jun 2018 03:27:00 -0700 From: Jeff Guo To: stephen@networkplumber.org, bruce.richardson@intel.com, ferruh.yigit@intel.com, konstantin.ananyev@intel.com, gaetan.rivet@6wind.com, jingjing.wu@intel.com, thomas@monjalon.net, motih@mellanox.com, matan@mellanox.com, harry.van.haaren@intel.com, qi.z.zhang@intel.com, shaopeng.he@intel.com, bernard.iremonger@intel.com Cc: jblunck@infradead.org, shreyansh.jain@nxp.com, dev@dpdk.org, jia.guo@intel.com, helin.zhang@intel.com Date: Fri, 29 Jun 2018 18:24:26 +0800 Message-Id: <1530267871-7161-5-git-send-email-jia.guo@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530267871-7161-1-git-send-email-jia.guo@intel.com> References: <1530267871-7161-1-git-send-email-jia.guo@intel.com> Subject: [dpdk-dev] [PATCH V4 4/9] bus/pci: implement sigbus handler operation X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch implements the ops of sigbus handler for PCI bus, it is functional to find the corresponding pci device which is be hot removal. and then handle the hot plug failure for this device. Signed-off-by: Jeff Guo --- v4->v3: split patches to be small and clear. --- drivers/bus/pci/pci_common.c | 50 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/drivers/bus/pci/pci_common.c b/drivers/bus/pci/pci_common.c index 095cd4e..0f5b4af 100644 --- a/drivers/bus/pci/pci_common.c +++ b/drivers/bus/pci/pci_common.c @@ -400,6 +400,32 @@ pci_find_device(const struct rte_device *start, rte_dev_cmp_t cmp, return NULL; } +/* check the failure address belongs to which device. */ +static struct rte_pci_device * +pci_find_device_by_addr(const void *failure_addr) +{ + struct rte_pci_device *pdev = NULL; + int i; + + FOREACH_DEVICE_ON_PCIBUS(pdev) { + for (i = 0; i != RTE_DIM(pdev->mem_resource); i++) { + if ((uint64_t)(uintptr_t)failure_addr >= + (uint64_t)(uintptr_t)pdev->mem_resource[i].addr && + (uint64_t)(uintptr_t)failure_addr < + (uint64_t)(uintptr_t)pdev->mem_resource[i].addr + + pdev->mem_resource[i].len) { + RTE_LOG(INFO, EAL, "Failure address " + "%16.16"PRIx64" belongs to " + "device %s!\n", + (uint64_t)(uintptr_t)failure_addr, + pdev->device.name); + return pdev; + } + } + } + return NULL; +} + static int pci_hotplug_handler(struct rte_device *dev) { @@ -428,6 +454,29 @@ pci_hotplug_handler(struct rte_device *dev) } static int +pci_sigbus_handler(const void *failure_addr) +{ + struct rte_pci_device *pdev = NULL; + int ret = 0; + + pdev = pci_find_device_by_addr(failure_addr); + if (!pdev) { + /* It is a generic sigbus error. */ + ret = 1; + } else { + /* The sigbus error is caused of hot removal. */ + ret = pci_hotplug_handler(&pdev->device); + if (ret) { + RTE_LOG(ERR, EAL, "Failed to handle hot plug for " + "device %s", pdev->name); + ret = -1; + rte_errno = -1; + } + } + return ret; +} + +static int pci_plug(struct rte_device *dev) { return pci_probe_all_drivers(RTE_DEV_TO_PCI(dev)); @@ -458,6 +507,7 @@ struct rte_pci_bus rte_pci_bus = { .parse = pci_parse, .get_iommu_class = rte_pci_get_iommu_class, .hotplug_handler = pci_hotplug_handler, + .sigbus_handler = pci_sigbus_handler, }, .device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list), .driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list), From patchwork Fri Jun 29 10:24:27 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 41943 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 1FFEF1B52A; Fri, 29 Jun 2018 12:27:11 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id EEC151B51F for ; Fri, 29 Jun 2018 12:27:06 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2018 03:27:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,285,1526367600"; d="scan'208";a="241324447" Received: from jeffguo-z170x-ud5.sh.intel.com (HELO localhost.localdomain) ([10.67.104.10]) by fmsmga005.fm.intel.com with ESMTP; 29 Jun 2018 03:27:03 -0700 From: Jeff Guo To: stephen@networkplumber.org, bruce.richardson@intel.com, ferruh.yigit@intel.com, konstantin.ananyev@intel.com, gaetan.rivet@6wind.com, jingjing.wu@intel.com, thomas@monjalon.net, motih@mellanox.com, matan@mellanox.com, harry.van.haaren@intel.com, qi.z.zhang@intel.com, shaopeng.he@intel.com, bernard.iremonger@intel.com Cc: jblunck@infradead.org, shreyansh.jain@nxp.com, dev@dpdk.org, jia.guo@intel.com, helin.zhang@intel.com Date: Fri, 29 Jun 2018 18:24:27 +0800 Message-Id: <1530267871-7161-6-git-send-email-jia.guo@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530267871-7161-1-git-send-email-jia.guo@intel.com> References: <1530267871-7161-1-git-send-email-jia.guo@intel.com> Subject: [dpdk-dev] [PATCH V4 5/9] bus: add helper to handle sigbus X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch aim to add a helper to iterate all buses to find the corresponding bus to handle the sigbus error. Signed-off-by: Jeff Guo --- v4->v3: split patches to be small and clear. --- lib/librte_eal/common/eal_common_bus.c | 34 +++++++++++++++++++++++++++++++++- lib/librte_eal/common/eal_private.h | 11 +++++++++++ 2 files changed, 44 insertions(+), 1 deletion(-) diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c index 0943851..34c4f2d 100644 --- a/lib/librte_eal/common/eal_common_bus.c +++ b/lib/librte_eal/common/eal_common_bus.c @@ -37,6 +37,7 @@ #include #include #include +#include #include "eal_private.h" @@ -220,7 +221,6 @@ rte_bus_find_by_device_name(const char *str) return rte_bus_find(NULL, bus_can_parse, name); } - /* * Get iommu class of devices on the bus. */ @@ -242,3 +242,35 @@ rte_bus_get_iommu_class(void) } return mode; } + +static int +bus_handle_sigbus(const struct rte_bus *bus, + const void *failure_addr) +{ + return !(bus->sigbus_handler && bus->sigbus_handler(failure_addr) <= 0); +} + +int +rte_bus_sigbus_handler(const void *failure_addr) +{ + struct rte_bus *bus; + int old_errno = rte_errno; + int ret = 0; + + rte_errno = 0; + + bus = rte_bus_find(NULL, bus_handle_sigbus, failure_addr); + if (bus == NULL) { + RTE_LOG(ERR, EAL, "No bus can handle the sigbus error!"); + ret = -1; + } else if (rte_errno != 0) { + RTE_LOG(ERR, EAL, "Failed to handle the sigbus error!"); + ret = -1; + } + + /* if sigbus not be handled, return back old errno. */ + if (ret) + rte_errno = old_errno; + + return ret; +} diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h index bdadc4d..9517f2b 100644 --- a/lib/librte_eal/common/eal_private.h +++ b/lib/librte_eal/common/eal_private.h @@ -258,4 +258,15 @@ int rte_mp_channel_init(void); */ void dev_callback_process(char *device_name, enum rte_dev_event_type event); + +/** + * Iterate all buses to find the corresponding bus, to handle the sigbus error. + * @param failure_addr + * Pointer of the fault address of the sigbus error. + * + * @return + * 0 on success. + * -1 on error + */ +int rte_bus_sigbus_handler(const void *failure_addr); #endif /* _EAL_PRIVATE_H_ */ From patchwork Fri Jun 29 10:24:28 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 41944 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 14E5B1B544; Fri, 29 Jun 2018 12:27:13 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 037421B52A for ; Fri, 29 Jun 2018 12:27:09 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2018 03:27:09 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,285,1526367600"; d="scan'208";a="241324451" Received: from jeffguo-z170x-ud5.sh.intel.com (HELO localhost.localdomain) ([10.67.104.10]) by fmsmga005.fm.intel.com with ESMTP; 29 Jun 2018 03:27:06 -0700 From: Jeff Guo To: stephen@networkplumber.org, bruce.richardson@intel.com, ferruh.yigit@intel.com, konstantin.ananyev@intel.com, gaetan.rivet@6wind.com, jingjing.wu@intel.com, thomas@monjalon.net, motih@mellanox.com, matan@mellanox.com, harry.van.haaren@intel.com, qi.z.zhang@intel.com, shaopeng.he@intel.com, bernard.iremonger@intel.com Cc: jblunck@infradead.org, shreyansh.jain@nxp.com, dev@dpdk.org, jia.guo@intel.com, helin.zhang@intel.com Date: Fri, 29 Jun 2018 18:24:28 +0800 Message-Id: <1530267871-7161-7-git-send-email-jia.guo@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530267871-7161-1-git-send-email-jia.guo@intel.com> References: <1530267871-7161-1-git-send-email-jia.guo@intel.com> Subject: [dpdk-dev] [PATCH V4 6/9] eal: add failure handle mechanism for hot plug X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch introduces a failure handler mechanism to handle device hot plug removal event. First register sigbus handler, once sigbus error be captured, will check the failure address and accordingly remap the invalid memory for the corresponding device. Bese on this mechanism, it could guaranty the application not to be crash when hot unplug devices. Signed-off-by: Jeff Guo --- v4->v3: split patches to be small and clear. --- lib/librte_eal/linuxapp/eal/eal_dev.c | 88 ++++++++++++++++++++++++++++++++++- 1 file changed, 87 insertions(+), 1 deletion(-) diff --git a/lib/librte_eal/linuxapp/eal/eal_dev.c b/lib/librte_eal/linuxapp/eal/eal_dev.c index 1cf6aeb..c9dddab 100644 --- a/lib/librte_eal/linuxapp/eal/eal_dev.c +++ b/lib/librte_eal/linuxapp/eal/eal_dev.c @@ -4,6 +4,8 @@ #include #include +#include +#include #include #include @@ -14,15 +16,24 @@ #include #include #include +#include +#include +#include +#include #include "eal_private.h" static struct rte_intr_handle intr_handle = {.fd = -1 }; static bool monitor_started; +extern struct rte_bus_list rte_bus_list; + #define EAL_UEV_MSG_LEN 4096 #define EAL_UEV_MSG_ELEM_LEN 128 +/* spinlock for device failure process */ +static rte_spinlock_t dev_failure_lock = RTE_SPINLOCK_INITIALIZER; + static void dev_uev_handler(__rte_unused void *param); /* identify the system layer which reports this event. */ @@ -33,6 +44,34 @@ enum eal_dev_event_subsystem { EAL_DEV_EVENT_SUBSYSTEM_MAX }; +static void sigbus_handler(int signum __rte_unused, siginfo_t *info, + void *ctx __rte_unused) +{ + int ret; + + RTE_LOG(DEBUG, EAL, "Thread[%d] catch SIGBUS, fault address:%p\n", + (int)pthread_self(), info->si_addr); + + rte_spinlock_lock(&dev_failure_lock); + ret = rte_bus_sigbus_handler(info->si_addr); + rte_spinlock_unlock(&dev_failure_lock); + if (!ret) + RTE_LOG(INFO, EAL, + "Success to handle SIGBUS error for hotplug!\n"); + else + rte_exit(EXIT_FAILURE, + "A generic SIGBUS error, (rte_errno: %s)!", + strerror(rte_errno)); +} + +static int cmp_dev_name(const struct rte_device *dev, + const void *_name) +{ + const char *name = _name; + + return strcmp(dev->name, name); +} + static int dev_uev_socket_fd_create(void) { @@ -147,6 +186,9 @@ dev_uev_handler(__rte_unused void *param) struct rte_dev_event uevent; int ret; char buf[EAL_UEV_MSG_LEN]; + struct rte_bus *bus; + struct rte_device *dev; + const char *busname; memset(&uevent, 0, sizeof(struct rte_dev_event)); memset(buf, 0, EAL_UEV_MSG_LEN); @@ -171,13 +213,48 @@ dev_uev_handler(__rte_unused void *param) RTE_LOG(DEBUG, EAL, "receive uevent(name:%s, type:%d, subsystem:%d)\n", uevent.devname, uevent.type, uevent.subsystem); - if (uevent.devname) + switch (uevent.subsystem) { + case EAL_DEV_EVENT_SUBSYSTEM_PCI: + case EAL_DEV_EVENT_SUBSYSTEM_UIO: + busname = "pci"; + break; + default: + break; + } + + if (uevent.devname) { + if (uevent.type == RTE_DEV_EVENT_REMOVE) { + bus = rte_bus_find_by_name(busname); + if (bus == NULL) { + RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", + busname); + return; + } + dev = bus->find_device(NULL, cmp_dev_name, + uevent.devname); + if (dev == NULL) { + RTE_LOG(ERR, EAL, "Cannot find device (%s) on " + "bus (%s)\n", uevent.devname, busname); + return; + } + rte_spinlock_lock(&dev_failure_lock); + ret = bus->hotplug_handler(dev); + rte_spinlock_unlock(&dev_failure_lock); + if (ret) { + RTE_LOG(ERR, EAL, "Can not handle hotplug for " + "device (%s)\n", dev->name); + return; + } + } dev_callback_process(uevent.devname, uevent.type); + } } int __rte_experimental rte_dev_event_monitor_start(void) { + sigset_t mask; + struct sigaction action; int ret; if (monitor_started) @@ -197,6 +274,14 @@ rte_dev_event_monitor_start(void) return -1; } + /* register sigbus handler */ + sigemptyset(&mask); + sigaddset(&mask, SIGBUS); + action.sa_flags = SA_SIGINFO; + action.sa_mask = mask; + action.sa_sigaction = sigbus_handler; + sigaction(SIGBUS, &action, NULL); + monitor_started = true; return 0; @@ -220,5 +305,6 @@ rte_dev_event_monitor_stop(void) close(intr_handle.fd); intr_handle.fd = -1; monitor_started = false; + return 0; } From patchwork Fri Jun 29 10:24:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 41945 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 7267E1B554; Fri, 29 Jun 2018 12:27:15 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id C21D31B539 for ; Fri, 29 Jun 2018 12:27:12 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2018 03:27:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,285,1526367600"; d="scan'208";a="241324456" Received: from jeffguo-z170x-ud5.sh.intel.com (HELO localhost.localdomain) ([10.67.104.10]) by fmsmga005.fm.intel.com with ESMTP; 29 Jun 2018 03:27:09 -0700 From: Jeff Guo To: stephen@networkplumber.org, bruce.richardson@intel.com, ferruh.yigit@intel.com, konstantin.ananyev@intel.com, gaetan.rivet@6wind.com, jingjing.wu@intel.com, thomas@monjalon.net, motih@mellanox.com, matan@mellanox.com, harry.van.haaren@intel.com, qi.z.zhang@intel.com, shaopeng.he@intel.com, bernard.iremonger@intel.com Cc: jblunck@infradead.org, shreyansh.jain@nxp.com, dev@dpdk.org, jia.guo@intel.com, helin.zhang@intel.com Date: Fri, 29 Jun 2018 18:24:29 +0800 Message-Id: <1530267871-7161-8-git-send-email-jia.guo@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530267871-7161-1-git-send-email-jia.guo@intel.com> References: <1530267871-7161-1-git-send-email-jia.guo@intel.com> Subject: [dpdk-dev] [PATCH V4 7/9] igb_uio: fix uio release issue when hot unplug X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" When hot unplug device, the kernel will release the device resource in the kernel side, such as the fd sys file will disappear, and the irq will be released. At this time, if igb uio driver still try to release this resource, it will cause kernel crash. On the other hand, something like interrupt disabling do not automatically process in kernel side. If not handler it, this redundancy and dirty thing will affect the interrupt resource be used by other device. So the igb_uio driver have to check the hot plug status, and the corresponding process should be taken in igb uio driver. This patch propose to add structure of rte_udev_state into rte_uio_pci_dev of igb_uio kernel driver, which will record the state of uio device, such as probed/opened/released/removed/unplug. When detect the unexpected removal which cause of hot unplug behavior, it will corresponding disable interrupt resource, while for the part of releasement which kernel have already handle, just skip it to avoid double free or null pointer kernel crash issue. Signed-off-by: Jeff Guo --- v4->v3: no change --- kernel/linux/igb_uio/igb_uio.c | 50 +++++++++++++++++++++++++++++++++++++----- 1 file changed, 45 insertions(+), 5 deletions(-) diff --git a/kernel/linux/igb_uio/igb_uio.c b/kernel/linux/igb_uio/igb_uio.c index b3233f1..d301302 100644 --- a/kernel/linux/igb_uio/igb_uio.c +++ b/kernel/linux/igb_uio/igb_uio.c @@ -19,6 +19,15 @@ #include "compat.h" +/* uio pci device state */ +enum rte_udev_state { + RTE_UDEV_PROBED, + RTE_UDEV_OPENNED, + RTE_UDEV_RELEASED, + RTE_UDEV_REMOVED, + RTE_UDEV_UNPLUG +}; + /** * A structure describing the private information for a uio device. */ @@ -28,6 +37,7 @@ struct rte_uio_pci_dev { enum rte_intr_mode mode; struct mutex lock; int refcnt; + enum rte_udev_state state; }; static char *intr_mode; @@ -194,12 +204,20 @@ igbuio_pci_irqhandler(int irq, void *dev_id) { struct rte_uio_pci_dev *udev = (struct rte_uio_pci_dev *)dev_id; struct uio_info *info = &udev->info; + struct pci_dev *pdev = udev->pdev; /* Legacy mode need to mask in hardware */ if (udev->mode == RTE_INTR_MODE_LEGACY && !pci_check_and_mask_intx(udev->pdev)) return IRQ_NONE; + /* check the uevent of the kobj */ + if ((&pdev->dev.kobj)->state_remove_uevent_sent == 1) { + dev_notice(&pdev->dev, "device:%s, sent remove uevent!\n", + (&pdev->dev.kobj)->name); + udev->state = RTE_UDEV_UNPLUG; + } + uio_event_notify(info); /* Message signal mode, no share IRQ and automasked */ @@ -308,7 +326,6 @@ igbuio_pci_disable_interrupts(struct rte_uio_pci_dev *udev) #endif } - /** * This gets called while opening uio device file. */ @@ -330,24 +347,33 @@ igbuio_pci_open(struct uio_info *info, struct inode *inode) /* enable interrupts */ err = igbuio_pci_enable_interrupts(udev); - mutex_unlock(&udev->lock); if (err) { dev_err(&dev->dev, "Enable interrupt fails\n"); + pci_clear_master(dev); return err; } + udev->state = RTE_UDEV_OPENNED; + mutex_unlock(&udev->lock); return 0; } +/** + * This gets called while closing uio device file. + */ static int igbuio_pci_release(struct uio_info *info, struct inode *inode) { + struct rte_uio_pci_dev *udev = info->priv; struct pci_dev *dev = udev->pdev; + if (udev->state == RTE_UDEV_REMOVED) + return 0; + mutex_lock(&udev->lock); if (--udev->refcnt > 0) { mutex_unlock(&udev->lock); - return 0; + return -1; } /* disable interrupts */ @@ -355,7 +381,7 @@ igbuio_pci_release(struct uio_info *info, struct inode *inode) /* stop the device from further DMA */ pci_clear_master(dev); - + udev->state = RTE_UDEV_RELEASED; mutex_unlock(&udev->lock); return 0; } @@ -557,6 +583,7 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) (unsigned long long)map_dma_addr, map_addr); } + udev->state = RTE_UDEV_PROBED; return 0; fail_remove_group: @@ -573,11 +600,24 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) static void igbuio_pci_remove(struct pci_dev *dev) { + struct rte_uio_pci_dev *udev = pci_get_drvdata(dev); + int ret; + + /* handler hot unplug */ + if (udev->state == RTE_UDEV_OPENNED || + udev->state == RTE_UDEV_UNPLUG) { + dev_notice(&dev->dev, "Unexpected removal!\n"); + ret = igbuio_pci_release(&udev->info, NULL); + if (ret) + return; + udev->state = RTE_UDEV_REMOVED; + return; + } mutex_destroy(&udev->lock); - sysfs_remove_group(&dev->dev.kobj, &dev_attr_grp); uio_unregister_device(&udev->info); + sysfs_remove_group(&dev->dev.kobj, &dev_attr_grp); igbuio_pci_release_iomem(&udev->info); pci_disable_device(dev); pci_set_drvdata(dev, NULL); From patchwork Fri Jun 29 10:24:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 41946 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 405281B55E; Fri, 29 Jun 2018 12:27:17 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 8716B1B546 for ; Fri, 29 Jun 2018 12:27:15 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2018 03:27:15 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,285,1526367600"; d="scan'208";a="241324461" Received: from jeffguo-z170x-ud5.sh.intel.com (HELO localhost.localdomain) ([10.67.104.10]) by fmsmga005.fm.intel.com with ESMTP; 29 Jun 2018 03:27:12 -0700 From: Jeff Guo To: stephen@networkplumber.org, bruce.richardson@intel.com, ferruh.yigit@intel.com, konstantin.ananyev@intel.com, gaetan.rivet@6wind.com, jingjing.wu@intel.com, thomas@monjalon.net, motih@mellanox.com, matan@mellanox.com, harry.van.haaren@intel.com, qi.z.zhang@intel.com, shaopeng.he@intel.com, bernard.iremonger@intel.com Cc: jblunck@infradead.org, shreyansh.jain@nxp.com, dev@dpdk.org, jia.guo@intel.com, helin.zhang@intel.com Date: Fri, 29 Jun 2018 18:24:30 +0800 Message-Id: <1530267871-7161-9-git-send-email-jia.guo@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530267871-7161-1-git-send-email-jia.guo@intel.com> References: <1530267871-7161-1-git-send-email-jia.guo@intel.com> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH V4 8/9] app/testpmd: show example to handle hot unplug X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Use testpmd for example, to show how an application smoothly handle failure when device being hot unplug. If app have enabled the device event monitor and register the hot plug event’s callback before running, once app detect the removal event, the callback would be called. It will first stop the packet forwarding, then stop the port, close the port, and finally detach the port to remove the device out from the device lists. Signed-off-by: Jeff Guo --- v4->v3: remove some unused code --- app/test-pmd/testpmd.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c index 24c1998..42ed196 100644 --- a/app/test-pmd/testpmd.c +++ b/app/test-pmd/testpmd.c @@ -2196,6 +2196,9 @@ static void eth_dev_event_callback(char *device_name, enum rte_dev_event_type type, __rte_unused void *arg) { + uint16_t port_id; + int ret; + if (type >= RTE_DEV_EVENT_MAX) { fprintf(stderr, "%s called upon invalid event %d\n", __func__, type); @@ -2206,9 +2209,12 @@ eth_dev_event_callback(char *device_name, enum rte_dev_event_type type, case RTE_DEV_EVENT_REMOVE: RTE_LOG(ERR, EAL, "The device: %s has been removed!\n", device_name); - /* TODO: After finish failure handle, begin to stop - * packet forward, stop port, close port, detach port. - */ + ret = rte_eth_dev_get_port_by_name(device_name, &port_id); + if (ret) { + printf("can not get port by device %s!\n", device_name); + return; + } + rmv_event_callback((void *)(intptr_t)port_id); break; case RTE_DEV_EVENT_ADD: RTE_LOG(ERR, EAL, "The device: %s has been added!\n", @@ -2736,7 +2742,6 @@ main(int argc, char** argv) return -1; } eth_dev_event_callback_register(); - } if (start_port(RTE_PORT_ALL) != 0) From patchwork Fri Jun 29 10:24:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 41947 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 1A5F41B566; Fri, 29 Jun 2018 12:27:20 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 6A66A1B562 for ; Fri, 29 Jun 2018 12:27:18 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2018 03:27:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,285,1526367600"; d="scan'208";a="241324473" Received: from jeffguo-z170x-ud5.sh.intel.com (HELO localhost.localdomain) ([10.67.104.10]) by fmsmga005.fm.intel.com with ESMTP; 29 Jun 2018 03:27:15 -0700 From: Jeff Guo To: stephen@networkplumber.org, bruce.richardson@intel.com, ferruh.yigit@intel.com, konstantin.ananyev@intel.com, gaetan.rivet@6wind.com, jingjing.wu@intel.com, thomas@monjalon.net, motih@mellanox.com, matan@mellanox.com, harry.van.haaren@intel.com, qi.z.zhang@intel.com, shaopeng.he@intel.com, bernard.iremonger@intel.com Cc: jblunck@infradead.org, shreyansh.jain@nxp.com, dev@dpdk.org, jia.guo@intel.com, helin.zhang@intel.com Date: Fri, 29 Jun 2018 18:24:31 +0800 Message-Id: <1530267871-7161-10-git-send-email-jia.guo@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530267871-7161-1-git-send-email-jia.guo@intel.com> References: <1530267871-7161-1-git-send-email-jia.guo@intel.com> Subject: [dpdk-dev] [PATCH V4 9/9] app/testpmd: enable device hotplug monitoring X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" As we know, there 2 different hotplug mechanisms in dpdk, the one is ethdev event + kernel driver hotplug solution, while the other one is eal device event + pci uio driver hotplug solution, each of them have different configure and callback process in testpmd. In oder to avoid the race between them, this patch aim to use a new parameter "--hotplug-mode" to replace the previous "--hot-plug" command parameter, to identify these different mode. There are 3 modes on hotplug mode: disable, eal, or ethdev(default). If user want to use eal device event monitor mode, could use below command when start testpmd. If not set this parameter, ethdev hotplug mode is default to be used. E.g. ./build/app/testpmd -c 0x3 --n 4 -- -i --hotplug-mode=eal Signed-off-by: Jeff Guo --- v4->v3: change to use new parameter "--hotplug-mode" in testpmd to identify the eal hotplug and ethdev hotplug --- app/test-pmd/parameters.c | 20 ++++++++++++++++---- app/test-pmd/testpmd.c | 18 +++++++++++------- app/test-pmd/testpmd.h | 8 +++++++- doc/guides/testpmd_app_ug/run_app.rst | 10 ++++++++-- 4 files changed, 42 insertions(+), 14 deletions(-) diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c index 7580762..601e13e 100644 --- a/app/test-pmd/parameters.c +++ b/app/test-pmd/parameters.c @@ -186,7 +186,8 @@ usage(char* progname) printf(" --flow-isolate-all: " "requests flow API isolated mode on all ports at initialization time.\n"); printf(" --tx-offloads=0xXXXXXXXX: hexadecimal bitmask of TX queue offloads\n"); - printf(" --hot-plug: enable hot plug for device.\n"); + printf(" --hotplug-mode=N: set hotplug mode for device " + "(N: disable (default) or eal or ethdev.\n"); printf(" --vxlan-gpe-port=N: UPD port of tunnel VXLAN-GPE\n"); printf(" --mlockall: lock all memory\n"); printf(" --no-mlockall: do not lock all memory\n"); @@ -621,7 +622,7 @@ launch_args_parse(int argc, char** argv) { "print-event", 1, 0, 0 }, { "mask-event", 1, 0, 0 }, { "tx-offloads", 1, 0, 0 }, - { "hot-plug", 0, 0, 0 }, + { "hotplug-mode", 1, 0, 0 }, { "vxlan-gpe-port", 1, 0, 0 }, { "mlockall", 0, 0, 0 }, { "no-mlockall", 0, 0, 0 }, @@ -1139,8 +1140,19 @@ launch_args_parse(int argc, char** argv) rte_exit(EXIT_FAILURE, "invalid mask-event argument\n"); } - if (!strcmp(lgopts[opt_idx].name, "hot-plug")) - hot_plug = 1; + if (!strcmp(lgopts[opt_idx].name, "hotplug-mode")) { + if (!strcmp(optarg, "disable")) + hotplug_mode = HOTPLUG_MODE_DISABLE; + else if (!strcmp(optarg, "eal")) + hotplug_mode = HOTPLUG_MODE_EAL; + else if (!strcmp(optarg, "ethdev")) + hotplug_mode = HOTPLUG_MODE_ETHDEV; + else + rte_exit(EXIT_FAILURE, + "hotplug-mode %s invalid - must be: " + "disable, eal, ethdev.\n", + optarg); + } if (!strcmp(lgopts[opt_idx].name, "mlockall")) do_mlockall = 1; if (!strcmp(lgopts[opt_idx].name, "no-mlockall")) diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c index 42ed196..9269400 100644 --- a/app/test-pmd/testpmd.c +++ b/app/test-pmd/testpmd.c @@ -286,7 +286,7 @@ uint8_t lsc_interrupt = 1; /* enabled by default */ */ uint8_t rmv_interrupt = 1; /* enabled by default */ -uint8_t hot_plug = 0; /**< hotplug disabled by default. */ +uint8_t hotplug_mode = HOTPLUG_MODE_ETHDEV; /**< hotplug disabled by default. */ /* * Display or mask ether events @@ -2043,7 +2043,7 @@ pmd_test_exit(void) } } - if (hot_plug) { + if (hotplug_mode == HOTPLUG_MODE_EAL) { ret = rte_dev_event_monitor_stop(); if (ret) RTE_LOG(ERR, EAL, @@ -2181,9 +2181,13 @@ eth_event_callback(portid_t port_id, enum rte_eth_event_type type, void *param, switch (type) { case RTE_ETH_EVENT_INTR_RMV: - if (rte_eal_alarm_set(100000, - rmv_event_callback, (void *)(intptr_t)port_id)) - fprintf(stderr, "Could not set up deferred device removal\n"); + if (hotplug_mode == HOTPLUG_MODE_ETHDEV) { + if (rte_eal_alarm_set(100000, + rmv_event_callback, + (void *)(intptr_t)port_id)) + fprintf(stderr, "Could not set up deferred " + "device removal\n"); + } break; default: break; @@ -2734,8 +2738,8 @@ main(int argc, char** argv) init_config(); - if (hot_plug) { - /* enable hot plug monitoring */ + if (hotplug_mode == HOTPLUG_MODE_EAL) { + /* enable hotplug event monitoring */ ret = rte_dev_event_monitor_start(); if (ret) { rte_errno = EINVAL; diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h index f51cd9d..e29ee2a 100644 --- a/app/test-pmd/testpmd.h +++ b/app/test-pmd/testpmd.h @@ -69,6 +69,12 @@ enum { PORT_TOPOLOGY_LOOP, }; +enum { + HOTPLUG_MODE_DISABLE, + HOTPLUG_MODE_EAL, + HOTPLUG_MODE_ETHDEV, +}; + #ifdef RTE_TEST_PMD_RECORD_BURST_STATS /** * The data structure associated with RX and TX packet burst statistics @@ -335,7 +341,7 @@ extern uint8_t lsc_interrupt; /**< disabled by "--no-lsc-interrupt" parameter */ extern uint8_t rmv_interrupt; /**< disabled by "--no-rmv-interrupt" parameter */ extern uint32_t event_print_mask; /**< set by "--print-event xxxx" and "--mask-event xxxx parameters */ -extern uint8_t hot_plug; /**< enable by "--hot-plug" parameter */ +extern uint8_t hotplug_mode; /**< set by "--hotplug-mode" parameter */ extern int do_mlockall; /**< set by "--mlockall" or "--no-mlockall" parameter */ #ifdef RTE_LIBRTE_IXGBE_BYPASS diff --git a/doc/guides/testpmd_app_ug/run_app.rst b/doc/guides/testpmd_app_ug/run_app.rst index f301c2b..09e2716 100644 --- a/doc/guides/testpmd_app_ug/run_app.rst +++ b/doc/guides/testpmd_app_ug/run_app.rst @@ -482,9 +482,15 @@ The commandline options are: Set the hexadecimal bitmask of TX queue offloads. The default value is 0. -* ``--hot-plug`` +* ``--hotplug-mode`` - Enable device event monitor machenism for hotplug. + Set the hotplug handle mode, that is ``disable`` or ``eal`` or ``ethdev`` (the default). + + In ``disable`` mode, it will not handle the hotplug for device. + + In ``eal`` mode, it will start device event monitor and register eth_dev_event_callback for hotplug process. + + In ``ethdev`` mode, it will process RTE_ETH_EVENT_INTR_RMV event which is detected from ethdev. * ``--vxlan-gpe-port=N``