From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 4DCDBA0548; Thu, 2 Dec 2021 13:50:47 +0100 (CET) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id C964340692; Thu, 2 Dec 2021 13:50:46 +0100 (CET) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by mails.dpdk.org (Postfix) with ESMTP id 2C6514067B for ; Thu, 2 Dec 2021 13:50:44 +0100 (CET) X-IronPort-AV: E=McAfee;i="6200,9189,10185"; a="223932225" X-IronPort-AV: E=Sophos;i="5.87,282,1631602800"; d="scan'208";a="223932225" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Dec 2021 04:50:44 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,282,1631602800"; d="scan'208";a="512641866" Received: from silpixa00400884.ir.intel.com ([10.243.22.82]) by fmsmga007.fm.intel.com with ESMTP; 02 Dec 2021 04:50:42 -0800 From: Radu Nicolau To: Bruce Richardson , Kevin Laatz Cc: dev@dpdk.org, Radu Nicolau Subject: [PATCH v2] dma/idxd: add allow/block list support Date: Thu, 2 Dec 2021 12:50:40 +0000 Message-Id: <20211202125040.3665-1-radu.nicolau@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211130095439.784229-1-radu.nicolau@intel.com> References: <20211130095439.784229-1-radu.nicolau@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 Add support for allow or block list for devices bound to the kernel driver. When used the allow or block list applies as an additional condition to the name prefix. Signed-off-by: Radu Nicolau Reviewed-by: Bruce Richardson Acked-by: Bruce Richardson --- v2: corrected doc doc/guides/dmadevs/idxd.rst | 8 ++++++++ drivers/dma/idxd/idxd_bus.c | 30 ++++++++++++++++++++++++++---- 2 files changed, 34 insertions(+), 4 deletions(-) diff --git a/doc/guides/dmadevs/idxd.rst b/doc/guides/dmadevs/idxd.rst index d4a210b854..a4681b2c5a 100644 --- a/doc/guides/dmadevs/idxd.rst +++ b/doc/guides/dmadevs/idxd.rst @@ -117,6 +117,14 @@ the value used as the DPDK ``--file-prefix`` parameter may be used as a workqueu name prefix, instead of ``dpdk_``, allowing each DPDK application instance to only use a subset of configured queues. +Additionally, the -a (allowlist) or -b (blocklist) commandline parameters are +also available to further restrict the device list that will be used. If the -a option is used, +then any device that passes the ``dpdk_`` or ``--file-prefix`` prefix condition must also be present in the allow list. +Similarly, when the block list is used, any device that passes the prefix condition must not be in the block list. +For example, to only use ``wq0.3``, assuming the name prefix condition is met:: + + $ dpdk-test -a wq0.3 + Once probed successfully, irrespective of kernel driver, the device will appear as a ``dmadev``, that is a "DMA device type" inside DPDK, and can be accessed using APIs from the ``rte_dmadev`` library. diff --git a/drivers/dma/idxd/idxd_bus.c b/drivers/dma/idxd/idxd_bus.c index 08639e9dce..13cb967f6d 100644 --- a/drivers/dma/idxd/idxd_bus.c +++ b/drivers/dma/idxd/idxd_bus.c @@ -9,6 +9,7 @@ #include #include +#include #include #include #include @@ -244,8 +245,18 @@ idxd_probe_dsa(struct rte_dsa_device *dev) return 0; } +static int search_devargs(const char *name) +{ + struct rte_devargs *devargs; + RTE_EAL_DEVARGS_FOREACH(dsa_bus.bus.name, devargs) { + if (strcmp(devargs->name, name) == 0) + return 1; + } + return 0; +} + static int -is_for_this_process_use(const char *name) +is_for_this_process_use(struct rte_dsa_device *dev, const char *name) { char *runtime_dir = strdup(rte_eal_get_runtime_dir()); char *prefix = basename(runtime_dir); @@ -257,6 +268,13 @@ is_for_this_process_use(const char *name) if (strncmp(name, prefix, prefixlen) == 0 && name[prefixlen] == '_') retval = 1; + if (retval && dsa_bus.bus.conf.scan_mode != RTE_BUS_SCAN_UNDEFINED) { + if (dsa_bus.bus.conf.scan_mode == RTE_BUS_SCAN_ALLOWLIST) + retval = search_devargs(dev->device.name); + else + retval = !search_devargs(dev->device.name); + } + free(runtime_dir); return retval; } @@ -273,7 +291,8 @@ dsa_probe(void) read_wq_string(dev, "name", name, sizeof(name)) < 0) continue; - if (strncmp(type, "user", 4) == 0 && is_for_this_process_use(name)) { + if (strncmp(type, "user", 4) == 0 && + is_for_this_process_use(dev, name)) { dev->device.driver = &dsa_bus.driver; idxd_probe_dsa(dev); continue; @@ -370,8 +389,11 @@ dsa_addr_parse(const char *name, void *addr) return -1; } - wq->device_id = device_id; - wq->wq_id = wq_id; + if (wq != NULL) { + wq->device_id = device_id; + wq->wq_id = wq_id; + } + return 0; } -- 2.25.1