From patchwork Tue Jan 26 08:57:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 12047827 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0C42BC433DB for ; Tue, 26 Jan 2021 18:58:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD6A02228A for ; Tue, 26 Jan 2021 18:58:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389674AbhAZRHV (ORCPT ); Tue, 26 Jan 2021 12:07:21 -0500 Received: from mail.kernel.org ([198.145.29.99]:53768 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390607AbhAZI7G (ORCPT ); Tue, 26 Jan 2021 03:59:06 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 34AD2230FF; Tue, 26 Jan 2021 08:57:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1611651465; bh=LECEB+cDh+iV4QGXRsrdF1G4GB6HAY18qykra5sbqcs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J0IRpmnMoaZlj5elyaR7XUTLCo+W4UIbEYEtSbGsaJYZ0GhEg6ojkoaWPWfIBFQFo P9DhkbgZCe5B8noFdhz9Lw3vR13VpnERj0/BPn7uCxQf0T9Iz4mnthZjfqZHvvzrA+ SkcHOI/8QCJ+DtnZyS4vaTUsHeZq3Bg01h92LvirSVZQn7juxUnJLqIoKHd3r308L1 4mNfr54ebc25osj4weDnDg2yXmta3NCznX5pSbzwr/uRQM9t4bwWpo+BpMNS8u6Skn SlDMESnjBRg5Lt20dvRLX2rD7toPnqpxEphjQZ3do0r08EjRRNOe8CvTPTPhBaK3u2 mK5Q9SyqzxkyQ== From: Leon Romanovsky To: Bjorn Helgaas , Saeed Mahameed Cc: Leon Romanovsky , Jason Gunthorpe , Alexander Duyck , Jakub Kicinski , linux-pci@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, Don Dutile , Alex Williamson , "David S . Miller" Subject: [PATCH mlx5-next v5 4/4] net/mlx5: Allow to the users to configure number of MSI-X vectors Date: Tue, 26 Jan 2021 10:57:30 +0200 Message-Id: <20210126085730.1165673-5-leon@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210126085730.1165673-1-leon@kernel.org> References: <20210126085730.1165673-1-leon@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Leon Romanovsky Implement ability to configure MSI-X for the SR-IOV VFs. Signed-off-by: Leon Romanovsky --- .../net/ethernet/mellanox/mlx5/core/main.c | 12 +++++ .../ethernet/mellanox/mlx5/core/mlx5_core.h | 1 + .../net/ethernet/mellanox/mlx5/core/sriov.c | 46 +++++++++++++++++++ 3 files changed, 59 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c index 79cfcc844156..228765c38cf8 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c @@ -1395,6 +1395,14 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *id) goto err_load_one; } + err = pci_enable_vfs_overlay(pdev); + if (err) { + mlx5_core_err(dev, + "pci_enable_vfs_overlay failed with error code %d\n", + err); + goto err_vfs_overlay; + } + err = mlx5_crdump_enable(dev); if (err) dev_err(&pdev->dev, "mlx5_crdump_enable failed with error code %d\n", err); @@ -1403,6 +1411,8 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *id) devlink_reload_enable(devlink); return 0; +err_vfs_overlay: + mlx5_unload_one(dev, true); err_load_one: mlx5_pci_close(dev); pci_init_err: @@ -1422,6 +1432,7 @@ static void remove_one(struct pci_dev *pdev) devlink_reload_disable(devlink); mlx5_crdump_disable(dev); + pci_disable_vfs_overlay(pdev); mlx5_drain_health_wq(dev); mlx5_unload_one(dev, true); mlx5_pci_close(dev); @@ -1650,6 +1661,7 @@ static struct pci_driver mlx5_core_driver = { .shutdown = shutdown, .err_handler = &mlx5_err_handler, .sriov_configure = mlx5_core_sriov_configure, + .sriov_set_msix_vec_count = mlx5_core_sriov_set_msix_vec_count, }; static void mlx5_core_verify_params(void) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h index 5babb4434a87..8a2523d2d43a 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h @@ -138,6 +138,7 @@ void mlx5_sriov_cleanup(struct mlx5_core_dev *dev); int mlx5_sriov_attach(struct mlx5_core_dev *dev); void mlx5_sriov_detach(struct mlx5_core_dev *dev); int mlx5_core_sriov_configure(struct pci_dev *dev, int num_vfs); +int mlx5_core_sriov_set_msix_vec_count(struct pci_dev *vf, int msix_vec_count); int mlx5_core_enable_hca(struct mlx5_core_dev *dev, u16 func_id); int mlx5_core_disable_hca(struct mlx5_core_dev *dev, u16 func_id); int mlx5_create_scheduling_element_cmd(struct mlx5_core_dev *dev, u8 hierarchy, diff --git a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c index f0ec86a1c8a6..252aa44ffbe3 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c @@ -144,6 +144,7 @@ mlx5_device_disable_sriov(struct mlx5_core_dev *dev, int num_vfs, bool clear_vf) static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs) { struct mlx5_core_dev *dev = pci_get_drvdata(pdev); + u32 num_vf_msix; int err; err = mlx5_device_enable_sriov(dev, num_vfs); @@ -152,11 +153,20 @@ static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs) return err; } + num_vf_msix = MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix); + pci_sriov_set_vf_total_msix(pdev, num_vf_msix); err = pci_enable_sriov(pdev, num_vfs); if (err) { mlx5_core_warn(dev, "pci_enable_sriov failed : %d\n", err); mlx5_device_disable_sriov(dev, num_vfs, true); } + err = pci_enable_vfs_overlay(pdev); + if (err) { + mlx5_core_warn(dev, "pci_enable_vfs_overlay failed : %d\n", + err); + pci_disable_sriov(pdev); + mlx5_device_disable_sriov(dev, num_vfs, true); + } return err; } @@ -165,6 +175,7 @@ static void mlx5_sriov_disable(struct pci_dev *pdev) struct mlx5_core_dev *dev = pci_get_drvdata(pdev); int num_vfs = pci_num_vf(dev->pdev); + pci_disable_vfs_overlay(pdev); pci_disable_sriov(pdev); mlx5_device_disable_sriov(dev, num_vfs, true); } @@ -187,6 +198,41 @@ int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs) return err ? err : num_vfs; } +int mlx5_core_sriov_set_msix_vec_count(struct pci_dev *vf, int msix_vec_count) +{ + struct pci_dev *pf = pci_physfn(vf); + struct mlx5_core_sriov *sriov; + struct mlx5_core_dev *dev; + int num_vf_msix, id; + + dev = pci_get_drvdata(pf); + num_vf_msix = MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix); + if (!num_vf_msix) + return -EOPNOTSUPP; + + if (!msix_vec_count) + msix_vec_count = + mlx5_get_default_msix_vec_count(dev, pci_num_vf(pf)); + + sriov = &dev->priv.sriov; + + /* Reversed translation of PCI VF function number to the internal + * function_id, which exists in the name of virtfn symlink. + */ + for (id = 0; id < pci_num_vf(pf); id++) { + if (!sriov->vfs_ctx[id].enabled) + continue; + + if (vf->devfn == pci_iov_virtfn_devfn(pf, id)) + break; + } + + if (id == pci_num_vf(pf) || !sriov->vfs_ctx[id].enabled) + return -EINVAL; + + return mlx5_set_msix_vec_count(dev, id + 1, msix_vec_count); +} + int mlx5_sriov_attach(struct mlx5_core_dev *dev) { if (!mlx5_core_is_pf(dev) || !pci_num_vf(dev->pdev))