From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 4D4BBA0561; Mon, 20 Apr 2020 08:56:14 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 1A5FD1D37E; Mon, 20 Apr 2020 08:56:14 +0200 (CEST) Received: from mx0b-0016f401.pphosted.com (mx0a-0016f401.pphosted.com [67.231.148.174]) by dpdk.org (Postfix) with ESMTP id 7A77B1C43D for ; Mon, 20 Apr 2020 08:56:12 +0200 (CEST) Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 03K6tAlg031405; Sun, 19 Apr 2020 23:56:11 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=pfpt0818; bh=m9HLL4g2/a81INTFJhFCVEYKKK9p4G3MycynkYYaUZo=; b=JCnvbXZWldGd1L1xIRTxdTKdvSkEQQHVybXbSswDY1HVNs6UdjwhJ26wkF0lctyVImGq WnWQRAlKIpK1FAWwk0ht+fBpgbpUzjvuhTQcr5Z4e/vfAZ8EB3ZcYDLTbQjJ630IW+tB tShehll1Amh05ubffvQ7ZAw8LaW7M+8zdZGwwe++iTe58L6TZ8LRySqNK2w0WZn6/KCw ANhPBAsl3eK1wDF94GwvsVeL2YgpWN1PzIFKiqioNO0MKlXF5VnzpOZWQQacJZOReZma L3d41Z93x6viIPugtVoHhqQbsA767fsJ1pHztDF0t41cMmXrRsCasPN4w0gXQ133D2dF Yw== Received: from sc-exch04.marvell.com ([199.233.58.184]) by mx0a-0016f401.pphosted.com with ESMTP id 30fxwp6355-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Sun, 19 Apr 2020 23:56:11 -0700 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by SC-EXCH04.marvell.com (10.93.176.84) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 19 Apr 2020 23:56:10 -0700 Received: from DC5-EXCH02.marvell.com (10.69.176.39) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 19 Apr 2020 23:56:09 -0700 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Sun, 19 Apr 2020 23:56:09 -0700 Received: from localhost.localdomain (unknown [10.28.34.200]) by maili.marvell.com (Postfix) with ESMTP id 6AAB53F703F; Sun, 19 Apr 2020 23:56:07 -0700 (PDT) From: Sunil Kumar Kori To: , , CC: , Sunil Kumar Kori Date: Mon, 20 Apr 2020 12:25:54 +0530 Message-ID: <20200420065554.20138-1-skori@marvell.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200407092856.554-1-skori@marvell.com> References: <20200407092856.554-1-skori@marvell.com> MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.676 definitions=2020-04-20_02:2020-04-17, 2020-04-20 signatures=0 Subject: [dpdk-dev] [PATCH v3 1/1] bus/pci: optimise scanning with whitelist/blacklist 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" rte_bus_scan API scans all the available PCI devices irrespective of white or black listing parameters then further devices are probed based on white or black listing parameters. So unnecessary CPU cycles are wasted during rte_pci_scan. For Octeontx2 platform with core frequency 2.4 Ghz, rte_bus_scan consumes around 26ms to scan around 90 PCI devices but all may not be used by the application. So for the application which uses 2 NICs, rte_bus_scan consumes few microseconds and rest time is saved with this patch. Patch restricts devices to be scanned as per below mentioned conditions: - All devices will be scanned if no parameters are passed. - Only white listed devices will be scanned if white list is available. - All devices, except black listed, will be scanned if black list is available. Signed-off-by: Sunil Kumar Kori --- v3: - remove __rte_experimental from private function. - remove entry from map file too. v2: - Added function to validate ignorance of device based on PCI address. - Marked device validation function as experimental. drivers/bus/pci/bsd/pci.c | 13 ++++++++++++- drivers/bus/pci/linux/pci.c | 3 +++ drivers/bus/pci/pci_common.c | 34 ++++++++++++++++++++++++++++++++++ drivers/bus/pci/private.h | 11 +++++++++++ 4 files changed, 60 insertions(+), 1 deletion(-) diff --git a/drivers/bus/pci/bsd/pci.c b/drivers/bus/pci/bsd/pci.c index ebbfeb13a..c8d954751 100644 --- a/drivers/bus/pci/bsd/pci.c +++ b/drivers/bus/pci/bsd/pci.c @@ -338,6 +338,7 @@ rte_pci_scan(void) .match_buf_len = sizeof(matches), .matches = &matches[0], }; + struct rte_pci_addr pci_addr; /* for debug purposes, PCI can be disabled */ if (!rte_eal_has_pci()) @@ -357,9 +358,19 @@ rte_pci_scan(void) goto error; } - for (i = 0; i < conf_io.num_matches; i++) + for (i = 0; i < conf_io.num_matches; i++) { + pci_addr.domain = matches[i].pc_sel.pc_domain; + pci_addr.bus = matches[i].pc_sel.pc_bus; + pci_addr.devid = matches[i].pc_sel.pc_dev; + pci_addr.function = matches[i].pc_sel.pc_func; + + /* Check that device should be ignored or not */ + if (pci_addr_ignore_device(&pci_addr)) + continue; + if (pci_scan_one(fd, &matches[i]) < 0) goto error; + } dev_count += conf_io.num_matches; } while(conf_io.status == PCI_GETCONF_MORE_DEVS); diff --git a/drivers/bus/pci/linux/pci.c b/drivers/bus/pci/linux/pci.c index 71b0a3053..92bdad826 100644 --- a/drivers/bus/pci/linux/pci.c +++ b/drivers/bus/pci/linux/pci.c @@ -487,6 +487,9 @@ rte_pci_scan(void) if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &addr) != 0) continue; + if (pci_addr_ignore_device(&addr)) + continue; + snprintf(dirname, sizeof(dirname), "%s/%s", rte_pci_get_sysfs_path(), e->d_name); diff --git a/drivers/bus/pci/pci_common.c b/drivers/bus/pci/pci_common.c index 3f5542076..a350a1993 100644 --- a/drivers/bus/pci/pci_common.c +++ b/drivers/bus/pci/pci_common.c @@ -589,6 +589,40 @@ pci_dma_unmap(struct rte_device *dev, void *addr, uint64_t iova, size_t len) return -1; } +static struct rte_devargs * +pci_addr_devargs_lookup(const struct rte_pci_addr *pci_addr) +{ + struct rte_devargs *devargs; + struct rte_pci_addr addr; + + RTE_EAL_DEVARGS_FOREACH("pci", devargs) { + devargs->bus->parse(devargs->name, &addr); + if (!rte_pci_addr_cmp(pci_addr, &addr)) + return devargs; + } + return NULL; +} + +bool +pci_addr_ignore_device(const struct rte_pci_addr *pci_addr) +{ + struct rte_devargs *devargs = pci_addr_devargs_lookup(pci_addr); + + switch (rte_pci_bus.bus.conf.scan_mode) { + case RTE_BUS_SCAN_WHITELIST: + if (devargs && devargs->policy == RTE_DEV_WHITELISTED) + return false; + break; + case RTE_BUS_SCAN_UNDEFINED: + case RTE_BUS_SCAN_BLACKLIST: + if (devargs == NULL || + devargs->policy != RTE_DEV_BLACKLISTED) + return false; + break; + } + return true; +} + static bool pci_ignore_device(const struct rte_pci_device *dev) { diff --git a/drivers/bus/pci/private.h b/drivers/bus/pci/private.h index a205d4d9f..75af786f7 100644 --- a/drivers/bus/pci/private.h +++ b/drivers/bus/pci/private.h @@ -42,6 +42,17 @@ int rte_pci_scan(void); void pci_name_set(struct rte_pci_device *dev); +/** + * Validate whether a device with given pci address should be ignored or not. + * + * @param pci_addr + * PCI address of device to be validated + * @return + * 1: if device is to be ignored, + * 0: if device is to be scanned, + */ +bool pci_addr_ignore_device(const struct rte_pci_addr *pci_addr); + /** * Add a PCI device to the PCI Bus (append to PCI Device list). This function * also updates the bus references of the PCI Device (and the generic device -- 2.17.1