From patchwork Sat Apr 10 14:23:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xueming Li X-Patchwork-Id: 91036 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 0E65BA0546; Sat, 10 Apr 2021 16:24:36 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id A8EF81412CE; Sat, 10 Apr 2021 16:24:30 +0200 (CEST) Received: from mellanox.co.il (mail-il-dmz.mellanox.com [193.47.165.129]) by mails.dpdk.org (Postfix) with ESMTP id 46EE01412CA for ; Sat, 10 Apr 2021 16:24:29 +0200 (CEST) Received: from Internal Mail-Server by MTLPINE1 (envelope-from xuemingl@nvidia.com) with SMTP; 10 Apr 2021 17:24:27 +0300 Received: from nvidia.com (pegasus05.mtr.labs.mlnx [10.210.16.100]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 13AEO6E2018265; Sat, 10 Apr 2021 17:24:27 +0300 From: Xueming Li To: Thomas Monjalon , Gaetan Rivet Cc: dev@dpdk.org, xuemingl@nvidia.com, Asaf Penso Date: Sat, 10 Apr 2021 14:23:56 +0000 Message-Id: <1618064637-16413-5-git-send-email-xuemingl@nvidia.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1618064637-16413-1-git-send-email-xuemingl@nvidia.com> References: <1618064637-16413-1-git-send-email-xuemingl@nvidia.com> In-Reply-To: <1608304614-13908-2-git-send-email-xuemingl@nvidia.com> References: <1608304614-13908-2-git-send-email-xuemingl@nvidia.com> Subject: [dpdk-dev] [PATCH v4 4/5] bus: add device arguments name parsing API X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 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" For device probe and iterator, devargs name was key information, parsed by rte_devargs_parse. In legacy parser, devargs name was extracted after bus name: bus:name,kv_arguments,,, Example: pci:83:00.0,arguments,... vdev:pcap0,... To be compatible with legacy parser, this patch introduces new bus driver API devargs_parse to parse devargs and update devargs name. If devargs_parse not implemented by bus driver, the new syntax parser rte_devargs_layers_parse default will resolve devargs name from bus's "name" argument. Different bus driver might choose different keys from arguments with unified format. The PCI bus implementation fills the devargs name with the "addr" argument, example: -a bus=pci,addr=83:00.0/class=eth/driver=mlx5,... name: 0000:03:00.0 -a bus=vdev,name=pcap0/class=eth/driver=pcap,... name:pcap0 Signed-off-by: Xueming Li Reviewed-by: Gaetan Rivet --- drivers/bus/pci/pci_common.c | 1 + drivers/bus/pci/pci_params.c | 47 ++++++++++++++++++++++ drivers/bus/pci/private.h | 14 +++++++ lib/librte_eal/common/eal_common_devargs.c | 31 ++++++++++++++ lib/librte_eal/include/rte_bus.h | 18 +++++++++ 5 files changed, 111 insertions(+) diff --git a/drivers/bus/pci/pci_common.c b/drivers/bus/pci/pci_common.c index 9b8d769287..61d3f51452 100644 --- a/drivers/bus/pci/pci_common.c +++ b/drivers/bus/pci/pci_common.c @@ -760,6 +760,7 @@ struct rte_pci_bus rte_pci_bus = { .dev_iterate = rte_pci_dev_iterate, .hot_unplug_handler = pci_hot_unplug_handler, .sigbus_handler = pci_sigbus_handler, + .devargs_parse = rte_pci_devargs_parse, }, .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_params.c b/drivers/bus/pci/pci_params.c index 3192e9c967..c0c282e948 100644 --- a/drivers/bus/pci/pci_params.c +++ b/drivers/bus/pci/pci_params.c @@ -8,6 +8,8 @@ #include #include #include +#include +#include #include "private.h" @@ -76,3 +78,48 @@ rte_pci_dev_iterate(const void *start, rte_kvargs_free(kvargs); return dev; } + +int +rte_pci_devargs_parse(struct rte_devargs *da) +{ + struct rte_kvargs *kvargs; + const char *addr_str; + struct rte_pci_addr addr; + int ret; + + if (da == NULL) + return 0; + RTE_ASSERT(da->bus_str != NULL); + + kvargs = rte_kvargs_parse(da->bus_str, NULL); + if (kvargs == NULL) { + RTE_LOG(ERR, EAL, "cannot parse argument list: %s\n", + da->bus_str); + ret = -ENODEV; + goto out; + } + + addr_str = rte_kvargs_get(kvargs, pci_params_keys[RTE_PCI_PARAM_ADDR]); + if (addr_str == NULL) { + RTE_LOG(ERR, EAL, "No PCI address specified using '%s=' in: %s\n", + pci_params_keys[RTE_PCI_PARAM_ADDR], da->bus_str); + ret = -ENODEV; + goto out; + } + + ret = rte_pci_addr_parse(addr_str, &addr); + if (ret != 0) { + RTE_LOG(ERR, EAL, "PCI address invalid: %s\n", da->bus_str); + ret = -EINVAL; + goto out; + } + + rte_pci_device_name(&addr, da->name, sizeof(da->name)); + +out: + if (kvargs != NULL) + rte_kvargs_free(kvargs); + if (ret != 0) + rte_errno = -ret; + return ret; +} diff --git a/drivers/bus/pci/private.h b/drivers/bus/pci/private.h index f566943f5e..8bc5140e97 100644 --- a/drivers/bus/pci/private.h +++ b/drivers/bus/pci/private.h @@ -267,4 +267,18 @@ rte_pci_dev_iterate(const void *start, const char *str, const struct rte_dev_iterator *it); +/* + * Parse device arguments and update name. + * + * @param da + * device arguments to parse. + * + * @return + * 0 on success. + * -EINVAL: kvargs string is invalid and cannot be parsed. + * -ENODEV: no key matching a device ID is found in the kv list. + */ +int +rte_pci_devargs_parse(struct rte_devargs *da); + #endif /* _PCI_PRIVATE_H_ */ diff --git a/lib/librte_eal/common/eal_common_devargs.c b/lib/librte_eal/common/eal_common_devargs.c index e40b91ea66..3a62521e05 100644 --- a/lib/librte_eal/common/eal_common_devargs.c +++ b/lib/librte_eal/common/eal_common_devargs.c @@ -19,6 +19,7 @@ #include #include #include +#include #include "eal_private.h" /** user device double-linked queue type definition */ @@ -40,6 +41,28 @@ devargs_layer_count(const char *s) return i; } +/* Resolve devargs name from bus arguments. */ +static int +devargs_bus_parse_default(struct rte_devargs *devargs, + struct rte_kvargs *bus_args) +{ + const char *name; + + /* Parse devargs name from bus key-value list. */ + name = rte_kvargs_get(bus_args, "name"); + if (name == NULL) { + RTE_LOG(INFO, EAL, "devargs name not found: %s\n", + devargs->data); + return 0; + } + if (rte_strscpy(devargs->name, name, sizeof(devargs->name)) < 0) { + RTE_LOG(ERR, EAL, "devargs name too long: %s\n", + devargs->data); + return -E2BIG; + } + return 0; +} + int rte_devargs_layers_parse(struct rte_devargs *devargs, const char *devstr) @@ -118,6 +141,8 @@ rte_devargs_layers_parse(struct rte_devargs *devargs, if (layers[i].kvlist == NULL) continue; kv = &layers[i].kvlist->pairs[0]; + if (kv->key == NULL) + continue; if (strcmp(kv->key, "bus") == 0) { bus = rte_bus_find_by_name(kv->value); if (bus == NULL) { @@ -160,6 +185,12 @@ rte_devargs_layers_parse(struct rte_devargs *devargs, } } + /* Resolve devarg's name. */ + if (bus && bus->devargs_parse) + ret = bus->devargs_parse(devargs); + else if (layers[0].kvlist != NULL) + ret = devargs_bus_parse_default(devargs, layers[0].kvlist); + get_out: for (i = 0; i < RTE_DIM(layers); i++) { if (layers[i].kvlist) diff --git a/lib/librte_eal/include/rte_bus.h b/lib/librte_eal/include/rte_bus.h index 80b154fb98..0a99f3b5a3 100644 --- a/lib/librte_eal/include/rte_bus.h +++ b/lib/librte_eal/include/rte_bus.h @@ -210,6 +210,23 @@ typedef int (*rte_bus_hot_unplug_handler_t)(struct rte_device *dev); */ typedef int (*rte_bus_sigbus_handler_t)(const void *failure_addr); +/** + * Parse device arguments, setting the device name in the devargs as a result. + * + * On error rte_errno is set. + * + * @param da + * Pointer to the devargs to parse. + * The 'bus_str' field must be set. + * + * @return + * 0 on successful parsing. + * -EINVAL: on parsing error. + * -ENODEV: if no key matching a device argument is specified. + * -E2BIG: device name is too long. + */ +typedef int (*rte_bus_devargs_parse_t)(struct rte_devargs *da); + /** * Bus scan policies */ @@ -267,6 +284,7 @@ struct rte_bus { /**< handle hot-unplug failure on the bus */ rte_bus_sigbus_handler_t sigbus_handler; /**< handle sigbus error on the bus */ + rte_bus_devargs_parse_t devargs_parse; /**< Parse device arguments */ };