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 A2A842FF164; Wed, 8 Jul 2026 21:00:28 +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=1783544429; cv=none; b=S6XNoTx7QlSTDzOn0FeGroZuD7xIKLxnZL2GjwTwSeM7bF/qMWWet61WbkzsjsANF+IK4z5t2g/EHgrardJkaKvNCwlBf0p2INQxdk8DHfAOT4AT9WijRLz0gbQdS4y+SN7O5MKwOD/0gGjB2D6ajphL9+oOHlrFENiEh+XVEK0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783544429; c=relaxed/simple; bh=CGmhYeHo9ruvnlF2f/eZBt95w03O2Ro9NBdOGYXrf5c=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=NNJ7GTOh0JWmKNgpglNuejXOprdPIx5oj//JrQ3HjOAVKwSFL8LkD3IyGf3kftqOX8+yCaWsCvdOf5+fQ0eTJHD1HTl4ibkVkgH7PD33UK74Ti1cQQeg+TAEgQ+lchxJ3u8r0jeKfUA3YUj7RG+LH0gfj+pbwgSMnxrDLKPts68= 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=SSLrwj/F; 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="SSLrwj/F" Received: by linux.microsoft.com (Postfix, from userid 1006) id 5E46820B716B; Wed, 8 Jul 2026 14:00:23 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 5E46820B716B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1783544423; bh=bdzu0Oi5yl8bAykCWi1Ow9jtLjVoEU97W+c58vtKvew=; h=From:To:Cc:Subject:Date:From; b=SSLrwj/Fzva25T3RpqLW0D+fHQS9I5Ur4PE6XYJbjOm4pJJka6feHB6AFoHBB9RVj uDsW9+gD4QnA7zDtAASQdlbXIsqUM+MHgYkdkeMhjRueE118et/Qj09sO1gH29wKKU WFW4hrLLYHkF3hiZwtBuxPBxYXUS8IQgDkIAGfls= 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 v3] net: mana: Add handler for sriov configure Date: Wed, 8 Jul 2026 13:59:18 -0700 Message-ID: <20260708205924.2408673-1-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 --- 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 | 26 +++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c index aef3b77229c1..80a9118a90bc 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); @@ -2517,6 +2519,8 @@ static void mana_gd_shutdown(struct pci_dev *pdev) dev_info(&pdev->dev, "Shutdown was called\n"); + pci_disable_sriov(pdev); + mana_rdma_remove(&gc->mana_ib); mana_remove(&gc->mana, true); @@ -2525,6 +2529,27 @@ 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 +2565,7 @@ 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