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Sun, 4 Feb 2024 00:13:30 -0600 From: Emily Deng To: , , , , , CC: Emily Deng Subject: [PATCH] PCI: Add vf reset notification for pf Date: Sun, 4 Feb 2024 14:12:57 +0800 Message-ID: <20240204061257.1408243-1-Emily.Deng@amd.com> X-Mailer: git-send-email 2.36.1 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00001508:EE_|SA1PR12MB7199:EE_ X-MS-Office365-Filtering-Correlation-Id: 893b5e49-c479-42d9-a45e-08dc25486a4e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(4636009)(136003)(396003)(39860400002)(376002)(346002)(230922051799003)(82310400011)(1800799012)(186009)(64100799003)(451199024)(46966006)(40470700004)(36840700001)(40460700003)(40480700001)(2906002)(15650500001)(478600001)(5660300002)(8936002)(83380400001)(110136005)(47076005)(70586007)(36756003)(7696005)(316002)(4326008)(8676002)(6666004)(70206006)(426003)(336012)(41300700001)(1076003)(356005)(86362001)(82740400003)(2616005)(26005)(36860700001)(81166007)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Feb 2024 06:13:33.0398 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 893b5e49-c479-42d9-a45e-08dc25486a4e X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00001508.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB7199 When a vf has been reset, the pf wants to get notification to remove the vf out of schedule. Solution: Add the callback function in pci_driver sriov_vf_reset_notification. When vf reset happens, then call this callback function. Signed-off-by: Emily Deng --- drivers/pci/pci.c | 8 ++++++++ include/linux/pci.h | 1 + 2 files changed, 9 insertions(+) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 60230da957e0..aca937b05531 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4780,6 +4780,14 @@ EXPORT_SYMBOL_GPL(pcie_flr); */ int pcie_reset_flr(struct pci_dev *dev, bool probe) { + struct pci_dev *pf_dev; + + if (dev->is_virtfn) { + pf_dev = dev->physfn; + if (pf_dev->driver->sriov_vf_reset_notification) + pf_dev->driver->sriov_vf_reset_notification(pf_dev, dev); + } + if (dev->dev_flags & PCI_DEV_FLAGS_NO_FLR_RESET) return -ENOTTY; diff --git a/include/linux/pci.h b/include/linux/pci.h index c69a2cc1f412..4fa31d9b0aa7 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -926,6 +926,7 @@ struct pci_driver { int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */ int (*sriov_set_msix_vec_count)(struct pci_dev *vf, int msix_vec_count); /* On PF */ u32 (*sriov_get_vf_total_msix)(struct pci_dev *pf); + void (*sriov_vf_reset_notification)(struct pci_dev *pf, struct pci_dev *vf); const struct pci_error_handlers *err_handler; const struct attribute_group **groups; const struct attribute_group **dev_groups;