From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56190E7DEF2 for ; Mon, 2 Feb 2026 15:35:20 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 36FD340E16; Mon, 2 Feb 2026 16:34:59 +0100 (CET) Received: from office2.cesnet.cz (office2.cesnet.cz [78.128.248.237]) by mails.dpdk.org (Postfix) with ESMTP id 95E6440DD1 for ; Mon, 2 Feb 2026 16:34:54 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cesnet.cz; s=office2-2020; t=1770046494; bh=+CaTB4XelbAJv7rtrvBkv+2ShXqBNMfi1V+fl2xRpzo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PM0fbf6p/tZYwDRuoorVYoeHTnbaBp2cxWObKL6eH/vBFrSEGNzJqwlnLSKmGJZqO M3pmUXh2cqisnB8pl/URPfd5kp9x63ZZV4MfniT8FRBe5ZhwYNgOllFAlr3Ph/ttZM iYtoXmqbNgwnCf2qpRhe0WqbTaum0uCeHEciD6lmZzuLlPr1r1c77DfYqafVsgd2bF qhgKQB9euhkP5MdaWgd6SoEl2s+Ibp7soB/9ZCBl7/Dw0H6kgoi5U3gIeyWMz/whea hG6OA+U0lsAjHj+g7JEMx8wTecg7wHfjLLuXSyT8OnBbWV3ZQp6py8nr1EbVBpPkhr vStWpy7bySsMA== Received: from emil.cesnet.cz (gtx107.cesnet.cz [IPv6:2001:718:812:27::107]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by office2.cesnet.cz (Postfix) with ESMTPSA id 799C71180078; Mon, 2 Feb 2026 16:34:54 +0100 (CET) From: spinler@cesnet.cz To: dev@dpdk.org Cc: Martin Spinler Subject: [PATCH v6 4/8] net/nfb: add device argument "port" to limit used ports Date: Mon, 2 Feb 2026 16:34:45 +0100 Message-ID: <20260202153449.3295979-5-spinler@cesnet.cz> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260202153449.3295979-1-spinler@cesnet.cz> References: <20260115151656.393106-1-spinler@cesnet.cz> <20260202153449.3295979-1-spinler@cesnet.cz> 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 From: Martin Spinler NFB devices do not use separate PCI device for each port; one PCI device contains handles for all ports instead. For some application this approach can be limiting. The "port" argument can be used to select only desired ports. It can be used multiple times. When is not used at all, the driver selects all ports. Signed-off-by: Martin Spinler --- drivers/net/nfb/nfb.h | 7 +++++ drivers/net/nfb/nfb_ethdev.c | 55 ++++++++++++++++++++++++++++++++++-- drivers/net/nfb/nfb_vdev.c | 3 +- 3 files changed, 61 insertions(+), 4 deletions(-) diff --git a/drivers/net/nfb/nfb.h b/drivers/net/nfb/nfb.h index a1134d7786..10d74eb49c 100644 --- a/drivers/net/nfb/nfb.h +++ b/drivers/net/nfb/nfb.h @@ -42,6 +42,13 @@ extern int nfb_logtype; #define RTE_NFB_DRIVER_NAME net_nfb +/* Device arguments */ +#define NFB_ARG_PORT "port" + +#define NFB_COMMON_ARGS \ + NFB_ARG_PORT "=" \ + "" + /* * Handles obtained from the libnfb: each process must use own instance. * Stored inside dev->process_private. diff --git a/drivers/net/nfb/nfb_ethdev.c b/drivers/net/nfb/nfb_ethdev.c index 6eb0cd08fd..b3863af2c3 100644 --- a/drivers/net/nfb/nfb_ethdev.c +++ b/drivers/net/nfb/nfb_ethdev.c @@ -4,6 +4,7 @@ * All rights reserved. */ +#include #include #include #include @@ -22,6 +23,11 @@ #include "nfb_rxmode.h" #include "nfb.h" +static const char * const VALID_KEYS[] = { + NFB_ARG_PORT, + NULL +}; + struct nfb_ifc_create_params { struct nfb_probe_params *probe_params; struct nc_ifc_map_info map_info; @@ -713,6 +719,24 @@ nfb_eth_dev_create_for_ifc(struct nfb_ifc_create_params *cp) return ret; } +static int nfb_eth_dev_create_for_ifc_by_port(const char *key __rte_unused, + const char *value, void *opaque) +{ + char *end; + unsigned long port; + struct nfb_ifc_create_params *ifc_params = opaque; + + if (value == NULL || strlen(value) == 0 || !isdigit(*value)) + return -EINVAL; + + port = strtoul(value, &end, 0); + if (*end != '\0' || port >= (unsigned long)ifc_params->map_info.ifc_cnt) + return -EINVAL; + + ifc_params->ifc_info = &ifc_params->map_info.ifc[port]; + return nfb_eth_dev_create_for_ifc(ifc_params); +} + RTE_EXPORT_INTERNAL_SYMBOL(nfb_eth_common_probe) int nfb_eth_common_probe(struct nfb_probe_params *params) @@ -722,6 +746,7 @@ nfb_eth_common_probe(struct nfb_probe_params *params) struct nfb_device *nfb_dev; struct nfb_ifc_create_params ifc_params; + struct rte_kvargs *kvlist = NULL; nfb_dev = nfb_open(params->path); if (nfb_dev == NULL) { @@ -733,16 +758,35 @@ nfb_eth_common_probe(struct nfb_probe_params *params) if (ret) goto err_map_info_create; + if (params->args != NULL && strlen(params->args) > 0) { + kvlist = rte_kvargs_parse(params->args, VALID_KEYS); + if (kvlist == NULL) { + NFB_LOG(ERR, "Failed to parse device arguments %s", params->args); + ret = -EINVAL; + goto err_parse_args; + } + } + ifc_params.probe_params = params; ifc_params.basename_len = strlen(params->name); - for (i = 0; i < ifc_params.map_info.ifc_cnt; i++) { - ifc_params.ifc_info = &ifc_params.map_info.ifc[i]; - ret = nfb_eth_dev_create_for_ifc(&ifc_params); + /* When at least one port argument is specified, create only selected ports */ + if (kvlist && rte_kvargs_count(kvlist, NFB_ARG_PORT)) { + ret = rte_kvargs_process(kvlist, NFB_ARG_PORT, + nfb_eth_dev_create_for_ifc_by_port, (void *)&ifc_params); if (ret) goto err_dev_create; + } else { + for (i = 0; i < ifc_params.map_info.ifc_cnt; i++) { + ifc_params.ifc_info = &ifc_params.map_info.ifc[i]; + ret = nfb_eth_dev_create_for_ifc(&ifc_params); + if (ret) + goto err_dev_create; + } } + rte_kvargs_free(kvlist); + nc_map_info_destroy(&ifc_params.map_info); nfb_close(nfb_dev); @@ -750,6 +794,8 @@ nfb_eth_common_probe(struct nfb_probe_params *params) err_dev_create: nfb_eth_common_remove(params->device); + rte_kvargs_free(kvlist); +err_parse_args: nc_map_info_destroy(&ifc_params.map_info); err_map_info_create: nfb_close(nfb_dev); @@ -858,3 +904,6 @@ RTE_PMD_REGISTER_PCI(RTE_NFB_DRIVER_NAME, nfb_eth_driver); RTE_PMD_REGISTER_PCI_TABLE(RTE_NFB_DRIVER_NAME, nfb_pci_id_table); RTE_PMD_REGISTER_KMOD_DEP(RTE_NFB_DRIVER_NAME, "* nfb"); RTE_LOG_REGISTER_DEFAULT(nfb_logtype, NOTICE); +RTE_PMD_REGISTER_PARAM_STRING(RTE_NFB_DRIVER_NAME, + NFB_COMMON_ARGS + ); diff --git a/drivers/net/nfb/nfb_vdev.c b/drivers/net/nfb/nfb_vdev.c index b79f7ac416..57f10d2068 100644 --- a/drivers/net/nfb/nfb_vdev.c +++ b/drivers/net/nfb/nfb_vdev.c @@ -102,5 +102,6 @@ static struct rte_vdev_driver vdev_nfb_vdev = { RTE_PMD_REGISTER_VDEV(VDEV_NFB_DRIVER, vdev_nfb_vdev); RTE_PMD_REGISTER_ALIAS(VDEV_NFB_DRIVER, eth_vdev_nfb); RTE_PMD_REGISTER_PARAM_STRING(net_vdev_nfb, - VDEV_NFB_ARG_DEV "=" + VDEV_NFB_ARG_DEV "= " + NFB_COMMON_ARGS ); -- 2.52.0