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(host.78.145.23.62.rev.coltfrance.com. [62.23.145.78]) by smtp.gmail.com with ESMTPSA id p5-v6sm2680880wre.83.2018.06.26.09.57.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 Jun 2018 09:57:01 -0700 (PDT) From: Gaetan Rivet To: dev@dpdk.org Cc: Gaetan Rivet Date: Tue, 26 Jun 2018 18:56:14 +0200 Message-Id: X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: Subject: [dpdk-dev] [PATCH v8 11/21] eal/dev: implement device iteration initialization 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" Parse a device description. Split this description in their relevant part for each layers. No dynamic allocation is performed. Signed-off-by: Gaetan Rivet --- lib/Makefile | 1 + lib/librte_eal/bsdapp/eal/Makefile | 1 + lib/librte_eal/common/eal_common_dev.c | 55 +++++++++++++++++++++++++++++++++ lib/librte_eal/common/include/rte_dev.h | 24 ++++++++++++++ lib/librte_eal/linuxapp/eal/Makefile | 1 + lib/librte_eal/rte_eal_version.map | 1 + 6 files changed, 83 insertions(+) diff --git a/lib/Makefile b/lib/Makefile index 8a65525cd..afa604e20 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -7,6 +7,7 @@ DIRS-y += librte_compat DIRS-$(CONFIG_RTE_LIBRTE_KVARGS) += librte_kvargs DEPDIRS-librte_kvargs := librte_compat DIRS-$(CONFIG_RTE_LIBRTE_EAL) += librte_eal +DEPDIRS-librte_eal := librte_kvargs DIRS-$(CONFIG_RTE_LIBRTE_PCI) += librte_pci DEPDIRS-librte_pci := librte_eal DIRS-$(CONFIG_RTE_LIBRTE_RING) += librte_ring diff --git a/lib/librte_eal/bsdapp/eal/Makefile b/lib/librte_eal/bsdapp/eal/Makefile index b0a1c880a..67b10ae0d 100644 --- a/lib/librte_eal/bsdapp/eal/Makefile +++ b/lib/librte_eal/bsdapp/eal/Makefile @@ -18,6 +18,7 @@ CFLAGS += $(WERROR_FLAGS) -O3 LDLIBS += -lexecinfo LDLIBS += -lpthread LDLIBS += -lgcc_s +LDLIBS += -lrte_kvargs EXPORT_MAP := ../../rte_eal_version.map diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c index ce4b51469..5b7956d17 100644 --- a/lib/librte_eal/common/eal_common_dev.c +++ b/lib/librte_eal/common/eal_common_dev.c @@ -10,9 +10,12 @@ #include #include +#include #include #include #include +#include +#include #include #include #include @@ -343,3 +346,55 @@ dev_callback_process(char *device_name, enum rte_dev_event_type event) } rte_spinlock_unlock(&dev_event_lock); } + +__rte_experimental +int +rte_dev_iterator_init(struct rte_dev_iterator *it, + const char *devstr) +{ + struct rte_devargs da; + struct rte_class *cls = NULL; + struct rte_bus *bus = NULL; + + /* Having both busstr and clsstr NULL is illegal, + * marking this iterator as invalid unless + * everything goes well. + */ + it->busstr = NULL; + it->clsstr = NULL; + + da.data = devstr; + if (rte_devargs_layers_parse(&da, devstr)) + goto get_out; + + bus = da.bus; + cls = da.cls; + /* The string should have at least + * one layer specified. + */ + if (bus == NULL && cls == NULL) { + RTE_LOG(ERR, EAL, + "Either bus or class must be specified.\n"); + rte_errno = EINVAL; + goto get_out; + } + if (bus != NULL && bus->dev_iterate == NULL) { + RTE_LOG(ERR, EAL, "Bus %s not supported\n", bus->name); + rte_errno = ENOTSUP; + goto get_out; + } + if (cls != NULL && cls->dev_iterate == NULL) { + RTE_LOG(ERR, EAL, "Class %s not supported\n", cls->name); + rte_errno = ENOTSUP; + goto get_out; + } + it->busstr = da.busstr; + it->clsstr = da.clsstr; + it->devstr = devstr; + it->bus = bus; + it->cls = cls; + it->device = NULL; + it->class_device = NULL; +get_out: + return -rte_errno; +} diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h index 120df729f..7b7bd83bc 100644 --- a/lib/librte_eal/common/include/rte_dev.h +++ b/lib/librte_eal/common/include/rte_dev.h @@ -332,6 +332,30 @@ typedef void *(*rte_dev_iterate_t)(const void *start, const char *devstr, const struct rte_dev_iterator *it); +/** + * Initializes a device iterator. + * + * This iterator allows accessing a list of devices matching a criteria. + * The device matching is made among all buses and classes currently registered, + * filtered by the device description given as parameter. + * + * This function will not allocate any memory. It is safe to stop the + * iteration at any moment and let the iterator go out of context. + * + * @param it + * Device iterator handle. + * + * @param str + * Device description string. + * + * @return + * 0 on successful initialization. + * <0 on error. + */ +__rte_experimental +int +rte_dev_iterator_init(struct rte_dev_iterator *it, const char *str); + #ifdef __cplusplus } #endif diff --git a/lib/librte_eal/linuxapp/eal/Makefile b/lib/librte_eal/linuxapp/eal/Makefile index babc8617a..885c48110 100644 --- a/lib/librte_eal/linuxapp/eal/Makefile +++ b/lib/librte_eal/linuxapp/eal/Makefile @@ -27,6 +27,7 @@ LDLIBS += -lrt ifeq ($(CONFIG_RTE_EAL_NUMA_AWARE_HUGEPAGES),y) LDLIBS += -lnuma endif +LDLIBS += -lrte_kvargs # specific to linuxapp exec-env SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) := eal.c diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map index 19d36b4c7..ac04120d6 100644 --- a/lib/librte_eal/rte_eal_version.map +++ b/lib/librte_eal/rte_eal_version.map @@ -251,6 +251,7 @@ EXPERIMENTAL { rte_dev_event_callback_unregister; rte_dev_event_monitor_start; rte_dev_event_monitor_stop; + rte_dev_iterator_init; rte_devargs_add; rte_devargs_dump; rte_devargs_insert;