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Thu, 13 Apr 2023 08:27:46 -0500 From: Nipun Gupta To: , , CC: , , , Nipun Gupta Subject: [PATCH v2 4/6] bus/cdx: support plug unplug and dev iterator Date: Thu, 13 Apr 2023 18:57:02 +0530 Message-ID: <20230413132704.17586-5-nipun.gupta@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230413132704.17586-1-nipun.gupta@amd.com> References: <20230124140746.594066-1-nipun.gupta@amd.com> <20230413132704.17586-1-nipun.gupta@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT071:EE_|IA1PR12MB6387:EE_ X-MS-Office365-Filtering-Correlation-Id: 10315c29-4dc4-4531-e19d-08db3c22e0cc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB03.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230028)(4636009)(396003)(376002)(136003)(346002)(39860400002)(451199021)(40470700004)(36840700001)(46966006)(6666004)(478600001)(40460700003)(47076005)(336012)(36756003)(82740400003)(81166007)(356005)(36860700001)(2616005)(86362001)(426003)(2906002)(40480700001)(44832011)(316002)(26005)(5660300002)(1076003)(110136005)(186003)(8676002)(82310400005)(41300700001)(4326008)(8936002)(70586007)(54906003)(70206006)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Apr 2023 13:27:50.0510 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 10315c29-4dc4-4531-e19d-08db3c22e0cc X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT071.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6387 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 This change adds support for plugging and unplugging CDX devices on the CDX bus. Also, CDX dev iterator support has been added for the CDX bus. Signed-off-by: Nipun Gupta --- drivers/bus/cdx/bus_cdx_driver.h | 1 + drivers/bus/cdx/cdx.c | 122 +++++++++++++++++++++++++++++++ 2 files changed, 123 insertions(+) diff --git a/drivers/bus/cdx/bus_cdx_driver.h b/drivers/bus/cdx/bus_cdx_driver.h index fdeaf46664..3d89e7c054 100644 --- a/drivers/bus/cdx/bus_cdx_driver.h +++ b/drivers/bus/cdx/bus_cdx_driver.h @@ -69,6 +69,7 @@ struct rte_cdx_id { struct rte_cdx_device { RTE_TAILQ_ENTRY(rte_cdx_device) next; /**< Next probed CDX device. */ struct rte_device device; /**< Inherit core device */ + struct rte_cdx_driver *driver; /**< CDX driver used in probing */ struct rte_cdx_id id; /**< CDX ID. */ struct rte_mem_resource mem_resource[CDX_MAX_RESOURCE]; /**< CDX Memory Resource */ diff --git a/drivers/bus/cdx/cdx.c b/drivers/bus/cdx/cdx.c index f34736a54a..e69ee503aa 100644 --- a/drivers/bus/cdx/cdx.c +++ b/drivers/bus/cdx/cdx.c @@ -68,6 +68,7 @@ #include #include #include +#include #include #include #include @@ -82,6 +83,15 @@ #define CDX_BUS_NAME cdx #define CDX_DEV_PREFIX "cdx-" +enum cdx_params { + RTE_CDX_PARAM_NAME, +}; + +static const char * const cdx_params_keys[] = { + [RTE_CDX_PARAM_NAME] = "name", + NULL, +}; + /** * @file * CDX probing using Linux sysfs. @@ -400,6 +410,7 @@ cdx_probe_one_driver(struct rte_cdx_driver *dr, } else { dev->device.driver = &dr->driver; } + dev->driver = dr; return ret; @@ -517,6 +528,71 @@ cdx_find_device(const struct rte_device *start, rte_dev_cmp_t cmp, return NULL; } +/* Remove a device from CDX bus */ +static void +cdx_remove_device(struct rte_cdx_device *cdx_dev) +{ + TAILQ_REMOVE(&rte_cdx_bus.device_list, cdx_dev, next); +} + +/* + * If vendor/device ID match, call the remove() function of the + * driver. + */ +static int +cdx_detach_dev(struct rte_cdx_device *dev) +{ + struct rte_cdx_driver *dr; + int ret = 0; + + if (dev == NULL) + return -EINVAL; + + dr = dev->driver; + + CDX_BUS_DEBUG("detach device %s using driver: %s", + dev->device.name, dr->driver.name); + + if (dr->remove) { + ret = dr->remove(dev); + if (ret < 0) + return ret; + } + + /* clear driver structure */ + dev->driver = NULL; + dev->device.driver = NULL; + + rte_cdx_unmap_device(dev); + + rte_intr_instance_free(dev->intr_handle); + dev->intr_handle = NULL; + + return 0; +} + +static int +cdx_plug(struct rte_device *dev) +{ + return cdx_probe_all_drivers(RTE_DEV_TO_CDX_DEV(dev)); +} + +static int +cdx_unplug(struct rte_device *dev) +{ + struct rte_cdx_device *cdx_dev; + int ret; + + cdx_dev = RTE_DEV_TO_CDX_DEV(dev); + ret = cdx_detach_dev(cdx_dev); + if (ret == 0) { + cdx_remove_device(cdx_dev); + rte_devargs_remove(dev->devargs); + free(cdx_dev); + } + return ret; +} + static int cdx_dma_map(struct rte_device *dev, void *addr, uint64_t iova, size_t len) { @@ -554,15 +630,61 @@ cdx_get_iommu_class(void) return RTE_IOVA_VA; } +static int +cdx_dev_match(const struct rte_device *dev, + const void *_kvlist) +{ + const struct rte_kvargs *kvlist = _kvlist; + const char *key = cdx_params_keys[RTE_CDX_PARAM_NAME]; + const char *name; + + /* no kvlist arg, all devices match */ + if (kvlist == NULL) + return 0; + + /* if key is present in kvlist and does not match, filter device */ + name = rte_kvargs_get(kvlist, key); + if (name != NULL && strcmp(name, dev->name)) + return -1; + + return 0; +} + +static void * +cdx_dev_iterate(const void *start, + const char *str, + const struct rte_dev_iterator *it __rte_unused) +{ + rte_bus_find_device_t find_device; + struct rte_kvargs *kvargs = NULL; + struct rte_device *dev; + + if (str != NULL) { + kvargs = rte_kvargs_parse(str, cdx_params_keys); + if (kvargs == NULL) { + CDX_BUS_ERR("cannot parse argument list %s", str); + rte_errno = EINVAL; + return NULL; + } + } + find_device = rte_cdx_bus.bus.find_device; + dev = find_device(start, cdx_dev_match, kvargs); + rte_kvargs_free(kvargs); + return dev; +} + struct rte_cdx_bus rte_cdx_bus = { .bus = { .scan = cdx_scan, .probe = cdx_probe, .find_device = cdx_find_device, + .plug = cdx_plug, + .unplug = cdx_unplug, .parse = cdx_parse, .dma_map = cdx_dma_map, .dma_unmap = cdx_dma_unmap, .get_iommu_class = cdx_get_iommu_class, + .dev_iterate = cdx_dev_iterate, }, .device_list = TAILQ_HEAD_INITIALIZER(rte_cdx_bus.device_list), .driver_list = TAILQ_HEAD_INITIALIZER(rte_cdx_bus.driver_list), -- 2.17.1