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Mon, 7 Aug 2023 06:07:43 -0500 Received: from SATLEXMB03.amd.com (10.181.40.144) by SATLEXMB06.amd.com (10.181.40.147) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Mon, 7 Aug 2023 06:07:42 -0500 Received: from xhdthippesw40.xilinx.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server id 15.1.2507.27 via Frontend Transport; Mon, 7 Aug 2023 06:07:39 -0500 From: Thippeswamy Havalige To: , , , , , CC: , , , , "Thippeswamy Havalige" Subject: [PATCH v1 1/2] PCI: xilinx-nwl: Update ECAM default value and remove unnecessary code. Date: Mon, 7 Aug 2023 16:37:32 +0530 Message-ID: <20230807110733.77364-2-thippeswamy.havalige@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230807110733.77364-1-thippeswamy.havalige@amd.com> References: <20230807110733.77364-1-thippeswamy.havalige@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000989E8:EE_|DM6PR12MB4354:EE_ X-MS-Office365-Filtering-Correlation-Id: 7211efe2-6a18-4f65-a1da-08db97368748 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: uVfah3SyLDelixuK5j9c3O0k/zBWsU7CY/sR8Iy5nb0+Vb/ocy9gddBO92lUSXjOwrUaA4qs6lvpr+0qJA4FmnTne/JltnOATE7fqPIcnvm8/xc2MCeHmEF14/JKQq55YBRjtq1thWP0MAp+jWv5OT4xeVvb+BYIzDZvRU+aNLX9pth18juJyspARAX8AByuMkceymPGMwT35wru82RISPx1b6rFIFr7gZvHbEskMfB4IWlQ264ODXxB7Zu8DsBzWY7ok5l417BKbpBCA3PSEnuecNfE+6PUYrQqb0+aT0K1rMXAAnwKCmgfrkNyT0wPdZbUl82hS8fFHduedd+UuMwqIkqsLxTZKUhEC3fMtOVerUGRyfH49HIrH84dUnNwpmJVWS3BWaTlD6zX6SyxTS61sp8nXAptEEmR8+hZ8fezieJd/gnqh5td10Txc/0s4SFXWjimX95jJ1GZOOxsJHjyrPptUu5vkHPC57xSyD+HyX7qN572H3wHMx9BFeDwa36hDMretAVmLtQHDHtKX7QmVa8Qab51s0SgdVMsC99/V+vUULQvyOvCNYIMEAoxmQvCcWsbDWYU7nA1LBVLv1ro7Ekr73AylPF1YqhgZR/cEu6XtbzKmvmwUgNzDOpABaArHHTZo2QGBC0jeQlM8HfyJ2bvxxChixDqizFvJ2yo+b1qGA+rCM9PeSzm1FfLIPmRup5bGo4Osv7iDDd23XmDx+R5oQ30Y/ZfqYlgSo8ewzKUHOFSNEzaM47e4yZqbYWlw1J0Vj5swY3+/DIcdg== 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:(13230028)(4636009)(396003)(346002)(136003)(376002)(39860400002)(451199021)(82310400008)(186006)(1800799003)(40470700004)(46966006)(36840700001)(40480700001)(336012)(40460700003)(2616005)(36756003)(966005)(4326008)(316002)(86362001)(478600001)(81166007)(110136005)(54906003)(356005)(70586007)(70206006)(6666004)(82740400003)(41300700001)(1076003)(26005)(426003)(15650500001)(8676002)(8936002)(47076005)(36860700001)(2906002)(83380400001)(5660300002)(44832011)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Aug 2023 11:07:45.5206 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7211efe2-6a18-4f65-a1da-08db97368748 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MWH0EPF000989E8.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4354 X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773571324761973337 X-GMAIL-MSGID: 1773571324761973337 Our controller is expecting ECAM size to be programmed by software. By programming "NWL_ECAM_VALUE_DEFAULT 12" controller can access up to 16MB ECAM region which is used to detect 16 buses, so by updating "NWL_ECAM_VALUE_DEFAULT " to 16 so that controller can access up to 256MB ECAM region to detect 256 buses. E_ECAM_CONTROL register from bit 16 to 20 uses this value as input to calculate ECAM Size. The primary,secondary and sub-ordinate bus number registers are updated by Linux PCI core, so removing code which is updating primary,secondary and sub-ordinate bus numbers of type 1 header 18th offset of ECAM. Signed-off-by: Thippeswamy Havalige Signed-off-by: Bharat Kumar Gogada --- | Reported-by: kernel test robot | Closes: | https://lore.kernel.org/oe-kbuild-all/202308040330.eMTjX3tF-lkp@intel. | com/ --- drivers/pci/controller/pcie-xilinx-nwl.c | 18 +++--------------- 1 file changed, 3 insertions(+), 15 deletions(-) diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c index 176686b..b515019 100644 --- a/drivers/pci/controller/pcie-xilinx-nwl.c +++ b/drivers/pci/controller/pcie-xilinx-nwl.c @@ -126,7 +126,7 @@ #define E_ECAM_CR_ENABLE BIT(0) #define E_ECAM_SIZE_LOC GENMASK(20, 16) #define E_ECAM_SIZE_SHIFT 16 -#define NWL_ECAM_VALUE_DEFAULT 12 +#define NWL_ECAM_VALUE_DEFAULT 16 #define CFG_DMA_REG_BAR GENMASK(2, 0) #define CFG_PCIE_CACHE GENMASK(7, 0) @@ -165,8 +165,6 @@ struct nwl_pcie { u32 ecam_size; int irq_intx; int irq_misc; - u32 ecam_value; - u8 last_busno; struct nwl_msi msi; struct irq_domain *legacy_irq_domain; struct clk *clk; @@ -625,7 +623,7 @@ static int nwl_pcie_bridge_init(struct nwl_pcie *pcie) { struct device *dev = pcie->dev; struct platform_device *pdev = to_platform_device(dev); - u32 breg_val, ecam_val, first_busno = 0; + u32 breg_val, ecam_val; int err; breg_val = nwl_bridge_readl(pcie, E_BREG_CAPABILITIES) & BREG_PRESENT; @@ -675,7 +673,7 @@ static int nwl_pcie_bridge_init(struct nwl_pcie *pcie) E_ECAM_CR_ENABLE, E_ECAM_CONTROL); nwl_bridge_writel(pcie, nwl_bridge_readl(pcie, E_ECAM_CONTROL) | - (pcie->ecam_value << E_ECAM_SIZE_SHIFT), + (NWL_ECAM_VALUE_DEFAULT << E_ECAM_SIZE_SHIFT), E_ECAM_CONTROL); nwl_bridge_writel(pcie, lower_32_bits(pcie->phys_ecam_base), @@ -683,15 +681,6 @@ static int nwl_pcie_bridge_init(struct nwl_pcie *pcie) nwl_bridge_writel(pcie, upper_32_bits(pcie->phys_ecam_base), E_ECAM_BASE_HI); - /* Get bus range */ - ecam_val = nwl_bridge_readl(pcie, E_ECAM_CONTROL); - pcie->last_busno = (ecam_val & E_ECAM_SIZE_LOC) >> E_ECAM_SIZE_SHIFT; - /* Write primary, secondary and subordinate bus numbers */ - ecam_val = first_busno; - ecam_val |= (first_busno + 1) << 8; - ecam_val |= (pcie->last_busno << E_ECAM_SIZE_SHIFT); - writel(ecam_val, (pcie->ecam_base + PCI_PRIMARY_BUS)); - if (nwl_pcie_link_up(pcie)) dev_info(dev, "Link is UP\n"); else @@ -792,7 +781,6 @@ static int nwl_pcie_probe(struct platform_device *pdev) pcie = pci_host_bridge_priv(bridge); pcie->dev = dev; - pcie->ecam_value = NWL_ECAM_VALUE_DEFAULT; err = nwl_pcie_parse_dt(pcie, pdev); if (err) {