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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Bjorn Helgaas , Rob Herring , Claudiu Manoil , Michael Walle , linux-kernel@vger.kernel.org, Jianmin Lv , Liu Peibao , Binbin Zhou , Huacai Chen Subject: [PATCH v2 pci/net 2/3] net: enetc: reimplement RFS/RSS memory clearing as PCI quirk Date: Thu, 3 Aug 2023 16:58:57 +0300 Message-Id: <20230803135858.2724342-3-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230803135858.2724342-1-vladimir.oltean@nxp.com> References: <20230803135858.2724342-1-vladimir.oltean@nxp.com> X-ClientProxiedBy: AM0PR06CA0108.eurprd06.prod.outlook.com (2603:10a6:208:fa::49) To AM0PR04MB6452.eurprd04.prod.outlook.com (2603:10a6:208:16d::21) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM0PR04MB6452:EE_|PAXPR04MB8799:EE_ X-MS-Office365-Filtering-Correlation-Id: 6ecb545f-f92b-4b4d-91e3-08db9429d0b6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6ecb545f-f92b-4b4d-91e3-08db9429d0b6 X-MS-Exchange-CrossTenant-AuthSource: AM0PR04MB6452.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Aug 2023 13:59:12.1121 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: PVLLMqnaM1+oZE6tCEAR8/H5k+gH+j1TkHOtuKgTAAPhJwWttzLU8+usS/JuaMBvlK16Hq49E3wL7hHqhhF0TQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAXPR04MB8799 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org The workaround implemented in commit 3222b5b613db ("net: enetc: initialize RFS/RSS memories for unused ports too") is no longer effective after commit 6fffbc7ae137 ("PCI: Honor firmware's device disabled status"). Thus, it has introduced a regression and we see AER errors being reported again: $ ip link set sw2p0 up && dhclient -i sw2p0 && ip addr show sw2p0 fsl_enetc 0000:00:00.2 eno2: configuring for fixed/internal link mode fsl_enetc 0000:00:00.2 eno2: Link is Up - 2.5Gbps/Full - flow control rx/tx mscc_felix 0000:00:00.5 swp2: configuring for fixed/sgmii link mode mscc_felix 0000:00:00.5 swp2: Link is Up - 1Gbps/Full - flow control off sja1105 spi2.2 sw2p0: configuring for phy/rgmii-id link mode sja1105 spi2.2 sw2p0: Link is Up - 1Gbps/Full - flow control off pcieport 0000:00:1f.0: AER: Multiple Corrected error received: 0000:00:00.0 pcieport 0000:00:1f.0: AER: can't find device of ID0000 Rob's suggestion is to reimplement the enetc driver workaround as a PCI fixup, and to modify the PCI core to run the fixups for all PCI functions. This change handles the first part. We refactor the common code in enetc_psi_create() and enetc_psi_destroy(), and use the PCI fixup only for those functions for which enetc_pf_probe() won't get called. This avoids some work being done twice for the PFs which are enabled. Fixes: 6fffbc7ae137 ("PCI: Honor firmware's device disabled status") Link: https://lore.kernel.org/netdev/CAL_JsqLsVYiPLx2kcHkDQ4t=hQVCR7NHziDwi9cCFUFhx48Qow@mail.gmail.com/ Suggested-by: Rob Herring Signed-off-by: Vladimir Oltean --- .../net/ethernet/freescale/enetc/enetc_pf.c | 103 +++++++++++++----- 1 file changed, 73 insertions(+), 30 deletions(-) diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c index 1416262d4296..d52ac0b6add6 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c @@ -1208,50 +1208,81 @@ static int enetc_pf_register_with_ierb(struct pci_dev *pdev) return enetc_ierb_register_pf(ierb_pdev, pdev); } -static int enetc_pf_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) +static struct enetc_si *enetc_psi_create(struct pci_dev *pdev) { - struct device_node *node = pdev->dev.of_node; - struct enetc_ndev_priv *priv; - struct net_device *ndev; struct enetc_si *si; - struct enetc_pf *pf; int err; - err = enetc_pf_register_with_ierb(pdev); - if (err == -EPROBE_DEFER) - return err; - if (err) - dev_warn(&pdev->dev, - "Could not register with IERB driver: %pe, please update the device tree\n", - ERR_PTR(err)); - - err = enetc_pci_probe(pdev, KBUILD_MODNAME, sizeof(*pf)); - if (err) - return dev_err_probe(&pdev->dev, err, "PCI probing failed\n"); + err = enetc_pci_probe(pdev, KBUILD_MODNAME, sizeof(struct enetc_pf)); + if (err) { + dev_err_probe(&pdev->dev, err, "PCI probing failed\n"); + goto out; + } si = pci_get_drvdata(pdev); if (!si->hw.port || !si->hw.global) { err = -ENODEV; dev_err(&pdev->dev, "could not map PF space, probing a VF?\n"); - goto err_map_pf_space; + goto out_pci_remove; } err = enetc_setup_cbdr(&pdev->dev, &si->hw, ENETC_CBDR_DEFAULT_SIZE, &si->cbd_ring); if (err) - goto err_setup_cbdr; + goto out_pci_remove; err = enetc_init_port_rfs_memory(si); if (err) { dev_err(&pdev->dev, "Failed to initialize RFS memory\n"); - goto err_init_port_rfs; + goto out_teardown_cbdr; } err = enetc_init_port_rss_memory(si); if (err) { dev_err(&pdev->dev, "Failed to initialize RSS memory\n"); - goto err_init_port_rss; + goto out_teardown_cbdr; + } + + return si; + +out_teardown_cbdr: + enetc_teardown_cbdr(&si->cbd_ring); +out_pci_remove: + enetc_pci_remove(pdev); +out: + return ERR_PTR(err); +} + +static void enetc_psi_destroy(struct pci_dev *pdev) +{ + struct enetc_si *si = pci_get_drvdata(pdev); + + enetc_teardown_cbdr(&si->cbd_ring); + enetc_pci_remove(pdev); +} + +static int enetc_pf_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct device_node *node = pdev->dev.of_node; + struct enetc_ndev_priv *priv; + struct net_device *ndev; + struct enetc_si *si; + struct enetc_pf *pf; + int err; + + err = enetc_pf_register_with_ierb(pdev); + if (err == -EPROBE_DEFER) + return err; + if (err) + dev_warn(&pdev->dev, + "Could not register with IERB driver: %pe, please update the device tree\n", + ERR_PTR(err)); + + si = enetc_psi_create(pdev); + if (IS_ERR(si)) { + err = PTR_ERR(si); + goto err_psi_create; } if (node && !of_device_is_available(node)) { @@ -1339,15 +1370,10 @@ static int enetc_pf_probe(struct pci_dev *pdev, si->ndev = NULL; free_netdev(ndev); err_alloc_netdev: -err_init_port_rss: -err_init_port_rfs: err_device_disabled: err_setup_mac_addresses: - enetc_teardown_cbdr(&si->cbd_ring); -err_setup_cbdr: -err_map_pf_space: - enetc_pci_remove(pdev); - + enetc_psi_destroy(pdev); +err_psi_create: return err; } @@ -1370,12 +1396,29 @@ static void enetc_pf_remove(struct pci_dev *pdev) enetc_free_msix(priv); enetc_free_si_resources(priv); - enetc_teardown_cbdr(&si->cbd_ring); free_netdev(si->ndev); - enetc_pci_remove(pdev); + enetc_psi_destroy(pdev); +} + +static void enetc_fixup_clear_rss_rfs(struct pci_dev *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct enetc_si *si; + + /* Only apply quirk for disabled functions. For the ones + * that are enabled, enetc_pf_probe() will apply it. + */ + if (node && of_device_is_available(node)) + return; + + si = enetc_psi_create(pdev); + if (si) + enetc_psi_destroy(pdev); } +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_PF, + enetc_fixup_clear_rss_rfs); static const struct pci_device_id enetc_pf_id_table[] = { { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_PF) },