From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f54.google.com (mail-wm0-f54.google.com [74.125.82.54]) by dpdk.org (Postfix) with ESMTP id 3E50D1B46A for ; Wed, 11 Jul 2018 23:45:52 +0200 (CEST) Received: by mail-wm0-f54.google.com with SMTP id h20-v6so3931320wmb.4 for ; Wed, 11 Jul 2018 14:45:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=6wind-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=pHdH5CMwam+4k9OqYdwo+Y6hZ7ItDWf7ml+tkO03Vgo=; b=rIZUoDme8DEElU6ha/ELmrytteJC5S8lQbRpvGWr9Sn5N4gwp3pjzyd790fi6BDA3a RDfgMXucLWJLNtGq+RVv9gFev3kV8snIoZRWMQkSXBAml1fZbZPoOC4/6dOVYTXY2Q0S as0mErgzP1lQtLEKIVdltRn+g+c0O9XObwMp8YClT8nyyfgRuVjSU9ZHE6mRhqMJQ8iP vY5xW2NBQNNeyA6JdCtu23hzXJGLWyLoFmDoxgJKF7L0jzOu8p0uC54fAH9zN2as1akZ 2sIMuF8JGTWdBYPm0sbJYIK/EKUYalmwQ5WAhh/0FYMQipMf8/7Eih2klxxuY4lfNvfg iCkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=pHdH5CMwam+4k9OqYdwo+Y6hZ7ItDWf7ml+tkO03Vgo=; b=Rhb+2AWyP/y/bWWZFySHe51y7CShasE5N/ccVxr/UVc6ISJ7c3DOww+/i0orrIDrmT o9/B8Wx9xj72XXqLqGg3Wp4Pudbsi1a4XaBixutApSNiOstLnHv7SxXQPX2aAYRSIl0v A4W7F2Pkzk0mRpSrm9i2KT8HJuWAWpK0FLoLMqEClggW7Q4+Xeo90JxOkDEK3qBxLF+N DGEBgSK93tj9tZDVpR89qZohN6DV1ojv+x2jZkZ+Cl4kpzxyHPW7kbJHAIAD+ymCtRmY kzgTPGxst+j2ZuX/ldIvAgciurC1RczKFEV7tBAuq44LrXFElcbeydnQghuxqXa62byr tQKA== X-Gm-Message-State: AOUpUlHtKnDL6L5m6lEmt1zF4ntoPllCJa0SlKDfj9Mt/RgAyIuqS7ro qJRcFYZxDCfegLePSfnDvnw6rXab X-Google-Smtp-Source: AAOMgpfflB3F2fAH7QwVrIcJrspPuHqNbSRXitLkaUrQfDYP4KNVX6RNDfrhE6WQwL4BP6GwB8J/GQ== X-Received: by 2002:a1c:e304:: with SMTP id a4-v6mr147466wmh.0.1531345551490; Wed, 11 Jul 2018 14:45:51 -0700 (PDT) Received: from bidouze.dev.6wind.com. (host.78.145.23.62.rev.coltfrance.com. [62.23.145.78]) by smtp.gmail.com with ESMTPSA id h5-v6sm10550936wrr.19.2018.07.11.14.45.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 11 Jul 2018 14:45:50 -0700 (PDT) From: Gaetan Rivet To: dev@dpdk.org Cc: Gaetan Rivet Date: Wed, 11 Jul 2018 23:45:01 +0200 Message-Id: X-Mailer: git-send-email 2.18.0 In-Reply-To: References: Subject: [dpdk-dev] [PATCH v11 11/25] eal/dev: implement device iteration 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: , X-List-Received-Date: Wed, 11 Jul 2018 21:45:52 -0000 Use the iteration hooks in the abstraction layers to perform the requested filtering on the internal device lists. Signed-off-by: Gaetan Rivet --- lib/librte_eal/common/eal_common_dev.c | 168 ++++++++++++++++++++++++ lib/librte_eal/common/include/rte_dev.h | 26 ++++ lib/librte_eal/rte_eal_version.map | 1 + 3 files changed, 195 insertions(+) diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c index 63e329bd8..b78845f02 100644 --- a/lib/librte_eal/common/eal_common_dev.c +++ b/lib/librte_eal/common/eal_common_dev.c @@ -45,6 +45,28 @@ static struct dev_event_cb_list dev_event_cbs; /* spinlock for device callbacks */ static rte_spinlock_t dev_event_lock = RTE_SPINLOCK_INITIALIZER; +struct dev_next_ctx { + struct rte_dev_iterator *it; + const char *bus_str; + const char *cls_str; +}; + +#define CTX(it, bus_str, cls_str) \ + (&(const struct dev_next_ctx){ \ + .it = it, \ + .bus_str = bus_str, \ + .cls_str = cls_str, \ + }) + +#define ITCTX(ptr) \ + (((struct dev_next_ctx *)(intptr_t)ptr)->it) + +#define BUSCTX(ptr) \ + (((struct dev_next_ctx *)(intptr_t)ptr)->bus_str) + +#define CLSCTX(ptr) \ + (((struct dev_next_ctx *)(intptr_t)ptr)->cls_str) + static int cmp_detached_dev_name(const struct rte_device *dev, const void *_name) { @@ -398,3 +420,149 @@ rte_dev_iterator_init(struct rte_dev_iterator *it, get_out: return -rte_errno; } + +static char * +dev_str_sane_copy(const char *str) +{ + size_t end; + char *copy; + + end = strcspn(str, ",/"); + if (str[end] == ',') { + copy = strdup(&str[end + 1]); + } else { + /* '/' or '\0' */ + copy = strdup(""); + } + if (copy == NULL) { + rte_errno = ENOMEM; + } else { + char *slash; + + slash = strchr(copy, '/'); + if (slash != NULL) + slash[0] = '\0'; + } + return copy; +} + +static int +class_next_dev_cmp(const struct rte_class *cls, + const void *ctx) +{ + struct rte_dev_iterator *it; + const char *cls_str = NULL; + void *dev; + + if (cls->dev_iterate == NULL) + return 1; + it = ITCTX(ctx); + cls_str = CLSCTX(ctx); + dev = it->class_device; + /* it->cls_str != NULL means a class + * was specified in the devstr. + */ + if (it->cls_str != NULL && cls != it->cls) + return 1; + /* If an error occurred previously, + * no need to test further. + */ + if (rte_errno != 0) + return -1; + dev = cls->dev_iterate(dev, cls_str, it); + it->class_device = dev; + return dev == NULL; +} + +static int +bus_next_dev_cmp(const struct rte_bus *bus, + const void *ctx) +{ + struct rte_device *dev = NULL; + struct rte_class *cls = NULL; + struct rte_dev_iterator *it; + const char *bus_str = NULL; + + if (bus->dev_iterate == NULL) + return 1; + it = ITCTX(ctx); + bus_str = BUSCTX(ctx); + dev = it->device; + /* it->bus_str != NULL means a bus + * was specified in the devstr. + */ + if (it->bus_str != NULL && bus != it->bus) + return 1; + /* If an error occurred previously, + * no need to test further. + */ + if (rte_errno != 0) + return -1; + if (it->cls_str == NULL) { + dev = bus->dev_iterate(dev, bus_str, it); + goto end; + } + /* cls_str != NULL */ + if (dev == NULL) { +next_dev_on_bus: + dev = bus->dev_iterate(dev, bus_str, it); + it->device = dev; + } + if (dev == NULL) + return 1; + if (it->cls != NULL) + cls = TAILQ_PREV(it->cls, rte_class_list, next); + cls = rte_class_find(cls, class_next_dev_cmp, ctx); + if (cls != NULL) { + it->cls = cls; + goto end; + } + goto next_dev_on_bus; +end: + it->device = dev; + return dev == NULL; +} +__rte_experimental +struct rte_device * +rte_dev_iterator_next(struct rte_dev_iterator *it) +{ + struct rte_bus *bus = NULL; + int old_errno = rte_errno; + char *bus_str = NULL; + char *cls_str = NULL; + + rte_errno = 0; + if (it->bus_str == NULL && it->cls_str == NULL) { + /* Invalid iterator. */ + rte_errno = EINVAL; + return NULL; + } + if (it->bus != NULL) + bus = TAILQ_PREV(it->bus, rte_bus_list, next); + if (it->bus_str != NULL) { + bus_str = dev_str_sane_copy(it->bus_str); + if (bus_str == NULL) + goto out; + } + if (it->cls_str != NULL) { + cls_str = dev_str_sane_copy(it->cls_str); + if (cls_str == NULL) + goto out; + } + while ((bus = rte_bus_find(bus, bus_next_dev_cmp, + CTX(it, bus_str, cls_str)))) { + if (it->device != NULL) { + it->bus = bus; + goto out; + } + if (it->bus_str != NULL || + rte_errno != 0) + break; + } + if (rte_errno == 0) + rte_errno = old_errno; +out: + free(bus_str); + free(cls_str); + return it->device; +} diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h index fdc812ff8..8638a2bbd 100644 --- a/lib/librte_eal/common/include/rte_dev.h +++ b/lib/librte_eal/common/include/rte_dev.h @@ -355,6 +355,32 @@ __rte_experimental int rte_dev_iterator_init(struct rte_dev_iterator *it, const char *str); +/** + * Iterates on a device iterator. + * + * Generates a new rte_device handle corresponding to the next element + * in the list described in comprehension by the iterator. + * + * The next object is returned, and the iterator is updated. + * + * @param it + * Device iterator handle. + * + * @return + * An rte_device handle if found. + * NULL if an error occurred (rte_errno is set). + * NULL if no device could be found (rte_errno is not set). + */ +__rte_experimental +struct rte_device * +rte_dev_iterator_next(struct rte_dev_iterator *it); + +#define RTE_DEV_FOREACH(dev, devstr, it) \ + for (rte_dev_iterator_init(it, devstr), \ + dev = rte_dev_iterator_next(it); \ + dev != NULL; \ + dev = rte_dev_iterator_next(it)) + #ifdef __cplusplus } #endif diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map index ac04120d6..4cd5ab3df 100644 --- a/lib/librte_eal/rte_eal_version.map +++ b/lib/librte_eal/rte_eal_version.map @@ -252,6 +252,7 @@ EXPERIMENTAL { rte_dev_event_monitor_start; rte_dev_event_monitor_stop; rte_dev_iterator_init; + rte_dev_iterator_next; rte_devargs_add; rte_devargs_dump; rte_devargs_insert; -- 2.18.0