From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 00E25388374; Fri, 10 Jul 2026 19:27:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783711674; cv=none; b=FgTZl09KPTLLM96q4aTd3MsqTlO4a0fN2HK1i3suOOFm5QPCOTHZ6iXPbqRpWFYNvggK4L2D/BMFR9pBoDhhD669nihJp3EdQODFJ9LRcW+3Kf0Qg7QlBnxQtAFrQIr+cHywdEm5oT5+ZoxV/vlPTDwcdT7cvKVdlmRmrr/RC/o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783711674; c=relaxed/simple; bh=UWj/0xJ3E/s9fNNFWLVQr/YscRyFgXX/OvTPMf1Fvbw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=HuzPd9fVFbr0ZBVxDFjQdTSJRquuOFcCCdy5xETLwAVVvRnggPpcRhAuismm14LKvouqYWXZKYBHgRPNCzrtY2LKtAx4k6D7umOQaiUXQmtwQCn9Gh42rwwMUizNeW9t8tk5WAWjlp+NQk0vY2luiXmxLS1iAUMOZ1L3H6oVIWg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=VBl1erQH; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="VBl1erQH" Received: by linux.microsoft.com (Postfix, from userid 1006) id 74B1720B7169; Fri, 10 Jul 2026 12:27:45 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 74B1720B7169 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1783711665; bh=CIGcZUacPy7ZKSLfX1pZyU4Ol+FGeuAdAMX6DIN/vCs=; h=From:To:Cc:Subject:Date:From; b=VBl1erQHAaEaduadQeljAY3y0Qs58udnTl6bE2Rf79pvfmWf7HNX0zjcsbvJBn84U NjvcI6UA0MLnuEeAHbrRWQjfpH9u4eCW2tJrrQ7vsC/vLXc8+w62YAmpcQJUJnE5s9 l6jBSjr/aOTQxJkY75WJrCzbgu8+tY/UrBhz5Sgw= From: Haiyang Zhang To: linux-hyperv@vger.kernel.org, netdev@vger.kernel.org, "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Erni Sri Satya Vennela , Dipayaan Roy , Aditya Garg , Shradha Gupta , linux-kernel@vger.kernel.org Cc: paulros@microsoft.com Subject: [PATCH net-next v4] net: mana: Add handler for sriov configure Date: Fri, 10 Jul 2026 12:27:29 -0700 Message-ID: <20260710192735.2921300-1-haiyangz@linux.microsoft.com> X-Mailer: git-send-email 2.43.7 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Haiyang Zhang Add callback function for the pci_driver / sriov_configure. It asks the NIC to provide certain number of VFs, or disable VFs if the request is zero. Signed-off-by: Haiyang Zhang --- v4: Removed unnecessary pci_disable_sriov() from mana_gd_shutdown() as suggested by AI review. v3: Updated sriov disabling paths suggested by Paolo Abeni v2: No longer change VF autoprobe as discussed with Leon Romanovsky and Bjorn Helgaas. --- .../net/ethernet/microsoft/mana/gdma_main.c | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c index aef3b77229c1..a38d4bb74621 100644 --- a/drivers/net/ethernet/microsoft/mana/gdma_main.c +++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c @@ -2456,6 +2456,8 @@ static void mana_gd_remove(struct pci_dev *pdev) { struct gdma_context *gc = pci_get_drvdata(pdev); + pci_disable_sriov(pdev); + mana_rdma_remove(&gc->mana_ib); mana_remove(&gc->mana, false); @@ -2525,6 +2527,27 @@ static void mana_gd_shutdown(struct pci_dev *pdev) pci_disable_device(pdev); } +static int mana_sriov_configure(struct pci_dev *pdev, int numvfs) +{ + int err = 0; + + dev_info(&pdev->dev, "Requested num VFs: %d\n", numvfs); + + if (numvfs > 0) { + err = pci_enable_sriov(pdev, numvfs); + } else { + if (pci_vfs_assigned(pdev)) { + dev_warn(&pdev->dev, + "Cannot disable SR-IOV while VFs are assigned\n"); + return -EPERM; + } + + pci_disable_sriov(pdev); + } + + return err ? err : numvfs; +} + static const struct pci_device_id mana_id_table[] = { { PCI_DEVICE(PCI_VENDOR_ID_MICROSOFT, MANA_PF_DEVICE_ID) }, { PCI_DEVICE(PCI_VENDOR_ID_MICROSOFT, MANA_PF2_DEVICE_ID) }, @@ -2540,6 +2563,7 @@ static struct pci_driver mana_driver = { .suspend = mana_gd_suspend, .resume = mana_gd_resume, .shutdown = mana_gd_shutdown, + .sriov_configure = mana_sriov_configure, }; static int __init mana_driver_init(void) -- 2.34.1