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Tue, 25 Oct 2022 13:11:52 -0500 From: Raju Rangoju To: , CC: , , , Raju Rangoju , "Basavaraj Natikar" Subject: [PATCH] i2c: amd-mp2: use msix/msi if the hardware supports Date: Tue, 25 Oct 2022 23:41:24 +0530 Message-ID: <20221025181124.421628-1-Raju.Rangoju@amd.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT045:EE_|SA1PR12MB6701:EE_ X-MS-Office365-Filtering-Correlation-Id: c8d151ce-30af-4bb2-f552-08dab6b46669 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: uoL+kdFGDxeO2G+sXYeZwK+8rA4leOG5eRs5ySvHnGv1CoKigSM3meUugksdhqJYdb8k/IBGxQprTpn/sYl/c1uh2d4DZSlNl43i52uWAEQWm1j9putAkIHg2yODCEmQXOKWsP7FJNCCga/g0l1DSI+t/FxuWrXLv2VUBqdBrQuRFiKiuoCdWbElDEvdxHd4e2t5YZ6GtQ8xRxDudDR0uHQWLJj4TUyD2J4BKUO+vQ96l5kGX4zvDkXeKFAKG1yrES95jyUPeBIbipcJM02gJ0k1C7qyLunf6zlvNUQ4/HMhAmVfKFCIjtCuTtLShagol9rQXUd3zRmVmYcZ4L50gV+nc0TSfjWrj7+bZwSv4r+eureqJ8zIG5fp6hhjaCb8N60SXIH01VVDVy615AUO2O1XD5bN2RgwuTg/CLWNpwOPj3UxQi6GHC6tA8PbdpFgjz9jdguidG8F46Pkh/SjSZFPvSoYm07DbGIoscHyC/euAH0RaXMb8N3WS8fbzs/YPgacbfhI4lfBW0W8W1XKqG7+mzK/wBC32W5qFFdABsv6RgRE7jgOHj2AC/ftBGzzR5ItTwAW89r9aqCqFUkdNhSihL5FlihHX98jjTDqfzMag50zXR2RKedVlJQdxnqEa9uKPkTpOGoCVSXEa6jrbimLmnCCDpD3RhxK0iDKFwNl8TszTpwv+y+7v4E50SxD1MhY2y3YdgsR/rewAg7JDpdnDMZXbJR1T7PX19J6ALApZezmTU2sTOej5sjmlQLhoXxuhEQK8+3pAWeAtSTgkKiharm5c5WfjPxeM0VTmHbT2CDOIAZc19h61hWdPVnCuMf6CDUoPMe/b+SoyZttYg== X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230022)(4636009)(396003)(346002)(136003)(39860400002)(376002)(451199015)(40470700004)(46966006)(36840700001)(36756003)(41300700001)(36860700001)(86362001)(40460700003)(82740400003)(2906002)(81166007)(2616005)(336012)(186003)(16526019)(1076003)(356005)(83380400001)(426003)(47076005)(8676002)(70586007)(6636002)(6666004)(70206006)(54906003)(40480700001)(26005)(4326008)(7696005)(8936002)(82310400005)(110136005)(5660300002)(316002)(478600001)(2101003)(36900700001);DIR:OUT;SFP:1101; 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Else, fallback to legacy interrupts. Fixes: 529766e0a011 ("i2c: Add drivers for the AMD PCIe MP2 I2C controller") Co-developed-by: Basavaraj Natikar Signed-off-by: Basavaraj Natikar Signed-off-by: Raju Rangoju Acked-by: Shyam Sundar S K --- drivers/i2c/busses/i2c-amd-mp2-pci.c | 30 +++++++++++++++++++--------- drivers/i2c/busses/i2c-amd-mp2.h | 1 + 2 files changed, 22 insertions(+), 9 deletions(-) diff --git a/drivers/i2c/busses/i2c-amd-mp2-pci.c b/drivers/i2c/busses/i2c-amd-mp2-pci.c index f57077a7448d..143165300949 100644 --- a/drivers/i2c/busses/i2c-amd-mp2-pci.c +++ b/drivers/i2c/busses/i2c-amd-mp2-pci.c @@ -288,7 +288,7 @@ static void amd_mp2_clear_reg(struct amd_mp2_dev *privdata) static int amd_mp2_pci_init(struct amd_mp2_dev *privdata, struct pci_dev *pci_dev) { - int rc; + int irq_flag = 0, rc; pci_set_drvdata(pci_dev, privdata); @@ -311,17 +311,29 @@ static int amd_mp2_pci_init(struct amd_mp2_dev *privdata, if (rc) goto err_dma_mask; - /* Set up intx irq */ + /* request and enable interrupt */ writel(0, privdata->mmio + AMD_P2C_MSG_INTEN); - pci_intx(pci_dev, 1); - rc = devm_request_irq(&pci_dev->dev, pci_dev->irq, amd_mp2_irq_isr, - IRQF_SHARED, dev_name(&pci_dev->dev), privdata); - if (rc) - pci_err(pci_dev, "Failure requesting irq %i: %d\n", - pci_dev->irq, rc); + rc = pci_alloc_irq_vectors(pci_dev, 1, 1, PCI_IRQ_ALL_TYPES); + if (rc < 0) { + dev_err(&pci_dev->dev, "Failed to allocate single IRQ err=%d\n", rc); + goto err_dma_mask; + } + + privdata->dev_irq = pci_irq_vector(pci_dev, 0); + if (!pci_dev->msix_enabled && !pci_dev->msi_enabled) + irq_flag = IRQF_SHARED; + + rc = devm_request_irq(&pci_dev->dev, privdata->dev_irq, + amd_mp2_irq_isr, irq_flag, dev_name(&pci_dev->dev), privdata); + if (rc) { + pci_err(pci_dev, "Failure requesting irq %i: %d\n", privdata->dev_irq, rc); + goto free_irq_vectors; + } return rc; +free_irq_vectors: + free_irq(privdata->dev_irq, privdata); err_dma_mask: pci_clear_master(pci_dev); err_pci_enable: @@ -364,7 +376,7 @@ static void amd_mp2_pci_remove(struct pci_dev *pci_dev) pm_runtime_forbid(&pci_dev->dev); pm_runtime_get_noresume(&pci_dev->dev); - pci_intx(pci_dev, 0); + free_irq(privdata->dev_irq, privdata); pci_clear_master(pci_dev); amd_mp2_clear_reg(privdata); diff --git a/drivers/i2c/busses/i2c-amd-mp2.h b/drivers/i2c/busses/i2c-amd-mp2.h index ddecd0c88656..018a42de8b1e 100644 --- a/drivers/i2c/busses/i2c-amd-mp2.h +++ b/drivers/i2c/busses/i2c-amd-mp2.h @@ -183,6 +183,7 @@ struct amd_mp2_dev { struct mutex c2p_lock; u8 c2p_lock_busid; unsigned int probed; + int dev_irq; }; /* PCIe communication driver */