From patchwork Wed Sep 26 21:47:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Monjalon X-Patchwork-Id: 45463 X-Patchwork-Delegate: thomas@monjalon.net 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 056CB1B495; Wed, 26 Sep 2018 23:48:27 +0200 (CEST) Received: from out1-smtp.messagingengine.com (out1-smtp.messagingengine.com [66.111.4.25]) by dpdk.org (Postfix) with ESMTP id 5E0731B476 for ; Wed, 26 Sep 2018 23:48:16 +0200 (CEST) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id B3BC522012; Wed, 26 Sep 2018 17:48:15 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Wed, 26 Sep 2018 17:48:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monjalon.net; h= cc:content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to:x-me-sender:x-me-sender :x-sasl-enc; s=mesmtp; bh=98beZJkfU9s9fKJaJqKU66PYXrBmnCd+EQEthx pdOvY=; b=cbOTYn8oLcCGj5TMaGdYhJPl//OPGup5EQLk//Ag+5ZGYTNj3EkWar u5Ce8v1s0vSzYSggduuu+JyeT5fT0NhYqCRbZSVKyrrmZgu0ADkE6kmCAUcJ8RXJ Iw0cNG3DmCtVuXMpfgIQJDUNysk6sGqfYD5dfVf80mjedgPZoBHMA= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-sender:x-me-sender:x-sasl-enc; s=fm3; bh=98beZJkfU9s9fKJaJ qKU66PYXrBmnCd+EQEthxpdOvY=; b=mADttBm0gh7g+pZXO0t26pjweetn8xZ/2 M0YSFKvSWKZY32PAy6Wn59JGGLZkJOL/Q18obuDAH4cT2Infj90YhK1qJ1cUtBnb j+SfAXOYcsMfPJiLlhxKcvoLvLe8l636ZP2uGkOTv7/hW2px3VjhATbrYBMnjP0V baQDjbGxkFzt0mWlScdbE514aHlj6H2AWpIKMVhWERZfMsoxvQxSIgcxxWddLZLo IfDS6JTBpbvRhe8NIPXV4rGjPowPUBEduTmmBMXHz92TgreLX7vs2J7hDTnKinlu J7xC3F/736vYLHEajbsdi1Ix19afsNKAs8uarSHHFdOOVM3Cdw4jw== X-ME-Proxy: X-ME-Sender: Received: from xps.monjalon.net (184.203.134.77.rev.sfr.net [77.134.203.184]) by mail.messagingengine.com (Postfix) with ESMTPA id 93B6A102DE; Wed, 26 Sep 2018 17:48:14 -0400 (EDT) From: Thomas Monjalon To: dev@dpdk.org Cc: gaetan.rivet@6wind.com, ophirmu@mellanox.com, qi.z.zhang@intel.com, ferruh.yigit@intel.com, ktraynor@redhat.com Date: Wed, 26 Sep 2018 23:47:59 +0200 Message-Id: <20180926214759.1856-5-thomas@monjalon.net> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20180926214759.1856-1-thomas@monjalon.net> References: <20180907222727.20521-1-thomas@monjalon.net> <20180926214759.1856-1-thomas@monjalon.net> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v2 4/4] eal: simplify parameters of hotplug functions 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" All information about a device to probe can be grouped in a common string, which is what we usually call devargs. An application should not have to parse this string before calling the EAL probe function. And the syntax could evolve to be more complex and support matching multiple devices in one string. That's why the bus name and device name should be removed from rte_eal_hotplug_add(). Instead of changing this function, a simpler one is added and used in the old one, which may be deprecated later. When removing a device, we already know its rte_device handle which can be directly passed as parameter of rte_eal_hotplug_remove(). If the rte_device is not known, it can be retrieved with the devargs, by iterating in the device list (future RTE_DEV_FOREACH()). Similarly to the probing case, a new function is added and used in the old one, which may be deprecated later. The new function is used in failsafe, because the replacement is easy. Signed-off-by: Thomas Monjalon --- drivers/net/failsafe/failsafe_eal.c | 3 +- drivers/net/failsafe/failsafe_ether.c | 3 +- lib/librte_eal/common/eal_common_dev.c | 76 ++++++++++++++++--------- lib/librte_eal/common/include/rte_dev.h | 30 +++++++++- lib/librte_eal/rte_eal_version.map | 2 + 5 files changed, 80 insertions(+), 34 deletions(-) diff --git a/drivers/net/failsafe/failsafe_eal.c b/drivers/net/failsafe/failsafe_eal.c index ce1633f13..8a888b1ff 100644 --- a/drivers/net/failsafe/failsafe_eal.c +++ b/drivers/net/failsafe/failsafe_eal.c @@ -144,8 +144,7 @@ fs_bus_uninit(struct rte_eth_dev *dev) int ret = 0; FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_PROBED) { - sdev_ret = rte_eal_hotplug_remove(sdev->bus->name, - sdev->dev->name); + sdev_ret = rte_dev_remove(sdev->dev); if (sdev_ret) { ERROR("Failed to remove requested device %s (err: %d)", sdev->dev->name, sdev_ret); diff --git a/drivers/net/failsafe/failsafe_ether.c b/drivers/net/failsafe/failsafe_ether.c index 5b5cb3b49..cd7b97e1f 100644 --- a/drivers/net/failsafe/failsafe_ether.c +++ b/drivers/net/failsafe/failsafe_ether.c @@ -265,8 +265,7 @@ fs_dev_remove(struct sub_device *sdev) sdev->state = DEV_PROBED; /* fallthrough */ case DEV_PROBED: - ret = rte_eal_hotplug_remove(sdev->bus->name, - sdev->dev->name); + ret = rte_dev_remove(sdev->dev); if (ret) { ERROR("Bus detach failed for sub_device %u", SUB_ID(sdev)); diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c index 43fdab395..85eb1569f 100644 --- a/lib/librte_eal/common/eal_common_dev.c +++ b/lib/librte_eal/common/eal_common_dev.c @@ -129,46 +129,57 @@ int rte_eal_dev_detach(struct rte_device *dev) int rte_eal_hotplug_add(const char *busname, const char *devname, - const char *devargs) + const char *drvargs) +{ + char *devargs = NULL; + int size, length = -1; + + do { /* 2 iterations: first is to know string length */ + size = length + 1; + length = snprintf(devargs, size, "%s:%s,%s", busname, devname, drvargs); + if (length >= size) + devargs = malloc(length + 1); + if (devargs == NULL) + return -ENOMEM; + } while (size == 0); + + return rte_dev_probe(devargs); +} + +int __rte_experimental +rte_dev_probe(const char *devargs) { - struct rte_bus *bus; struct rte_device *dev; struct rte_devargs *da; int ret; - bus = rte_bus_find_by_name(busname); - if (bus == NULL) { - RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname); - return -ENOENT; - } - - if (bus->plug == NULL) { - RTE_LOG(ERR, EAL, "Function plug not supported by bus (%s)\n", - bus->name); - return -ENOTSUP; - } - da = calloc(1, sizeof(*da)); if (da == NULL) return -ENOMEM; - ret = rte_devargs_parsef(da, "%s:%s,%s", - busname, devname, devargs); + ret = rte_devargs_parse(da, devargs); if (ret) goto err_devarg; + if (da->bus->plug == NULL) { + RTE_LOG(ERR, EAL, "Function plug not supported by bus (%s)\n", + da->bus->name); + ret = -ENOTSUP; + goto err_devarg; + } + ret = rte_devargs_insert(da); if (ret) goto err_devarg; - ret = bus->scan(); + ret = da->bus->scan(); if (ret) goto err_devarg; - dev = bus->find_device(NULL, cmp_dev_name, devname); + dev = da->bus->find_device(NULL, cmp_dev_name, da->name); if (dev == NULL) { RTE_LOG(ERR, EAL, "Cannot find device (%s)\n", - devname); + da->name); ret = -ENODEV; goto err_devarg; } @@ -178,7 +189,7 @@ rte_eal_hotplug_add(const char *busname, const char *devname, return -EEXIST; } - ret = bus->plug(dev); + ret = da->bus->plug(dev); if (ret) { RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n", dev->name); @@ -197,9 +208,8 @@ rte_eal_hotplug_add(const char *busname, const char *devname, int rte_eal_hotplug_remove(const char *busname, const char *devname) { - struct rte_bus *bus; struct rte_device *dev; - int ret; + struct rte_bus *bus; bus = rte_bus_find_by_name(busname); if (bus == NULL) { @@ -207,23 +217,33 @@ rte_eal_hotplug_remove(const char *busname, const char *devname) return -ENOENT; } - if (bus->unplug == NULL) { - RTE_LOG(ERR, EAL, "Function unplug not supported by bus (%s)\n", - bus->name); - return -ENOTSUP; - } - dev = bus->find_device(NULL, cmp_dev_name, devname); if (dev == NULL) { RTE_LOG(ERR, EAL, "Cannot find plugged device (%s)\n", devname); return -EINVAL; } + return rte_dev_remove(dev); +} + +int __rte_experimental +rte_dev_remove(struct rte_device *dev) +{ + struct rte_bus *bus; + int ret; + if (dev->driver == NULL) { RTE_LOG(ERR, EAL, "Device is already unplugged\n"); return -ENOENT; } + bus = dev->devargs->bus; + if (bus->unplug == NULL) { + RTE_LOG(ERR, EAL, "Function unplug not supported by bus (%s)\n", + bus->name); + return -ENOTSUP; + } + ret = bus->unplug(dev); if (ret) RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n", diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h index 4f5282459..7a30362c0 100644 --- a/lib/librte_eal/common/include/rte_dev.h +++ b/lib/librte_eal/common/include/rte_dev.h @@ -196,13 +196,26 @@ int rte_eal_dev_detach(struct rte_device *dev); * @param devname * The device name. Based on this device name, eal will identify a driver * capable of handling it and pass it to the driver probing function. - * @param devargs + * @param drvargs * Device arguments to be passed to the driver. * @return * 0 on success, negative on error. */ int rte_eal_hotplug_add(const char *busname, const char *devname, - const char *devargs); + const char *drvargs); + +/** + * @warning + * @b EXPERIMENTAL: this API may change without prior notice + * + * Add matching devices. + * + * @param devargs + * Device arguments including bus, class and driver properties. + * @return + * 0 on success, negative on error. + */ +int __rte_experimental rte_dev_probe(const char *devargs); /** * Hotplug remove a given device from a specific bus. @@ -216,6 +229,19 @@ int rte_eal_hotplug_add(const char *busname, const char *devname, */ int rte_eal_hotplug_remove(const char *busname, const char *devname); +/** + * @warning + * @b EXPERIMENTAL: this API may change without prior notice + * + * Remove one device. + * + * @param dev + * Data structure of the device to remove. + * @return + * 0 on success, negative on error. + */ +int __rte_experimental rte_dev_remove(struct rte_device *dev); + /** * Device comparison function. * diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map index 6bff37f4b..2ea7a870a 100644 --- a/lib/librte_eal/rte_eal_version.map +++ b/lib/librte_eal/rte_eal_version.map @@ -281,6 +281,8 @@ EXPERIMENTAL { rte_dev_event_monitor_stop; rte_dev_iterator_init; rte_dev_iterator_next; + rte_dev_probe; + rte_dev_remove; rte_devargs_add; rte_devargs_dump; rte_devargs_insert;