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Fri, 30 May 2025 06:34:34 -0700 From: Sumit Gupta To: , , , , , , , CC: <--to=tbergstrom@nvidia.com>, , Subject: [Patch 5/8] soc: tegra: cbb: support hw lookup to get timed out target address Date: Fri, 30 May 2025 19:03:33 +0530 Message-ID: <20250530133336.1419971-6-sumitg@nvidia.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250530133336.1419971-1-sumitg@nvidia.com> References: <20250530133336.1419971-1-sumitg@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF000044FC:EE_|PH8PR12MB6747:EE_ X-MS-Office365-Filtering-Correlation-Id: 3a271f7a-0773-44a1-ab5f-08dd9f7ec1b8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|376014|36860700013; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 May 2025 13:34:51.9900 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3a271f7a-0773-44a1-ab5f-08dd9f7ec1b8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000044FC.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6747 Content-Type: text/plain; charset="utf-8" Add support for hardware based lookup to get address of timed out target node. This features is added in upcoming SoCs and avoids need of creating per fabric target_map tables in driver. Signed-off-by: Sumit Gupta --- drivers/soc/tegra/cbb/tegra234-cbb.c | 41 ++++++++++++++++++++++++---- 1 file changed, 36 insertions(+), 5 deletions(-) diff --git a/drivers/soc/tegra/cbb/tegra234-cbb.c b/drivers/soc/tegra/cbb/t= egra234-cbb.c index 10f57f17fee8..aab0cd85dea5 100644 --- a/drivers/soc/tegra/cbb/tegra234-cbb.c +++ b/drivers/soc/tegra/cbb/tegra234-cbb.c @@ -30,13 +30,17 @@ #define FABRIC_EN_CFG_ADDR_LOW_0 0x80 #define FABRIC_EN_CFG_ADDR_HI_0 0x84 =20 +#define FABRIC_EN_CFG_TARGET_NODE_ADDR_INDEX_0_0 0x100 +#define FABRIC_EN_CFG_TARGET_NODE_ADDR_LOW_0 0x140 +#define FABRIC_EN_CFG_TARGET_NODE_ADDR_HI_0 0x144 + #define FABRIC_MN_INITIATOR_ERR_EN_0 0x200 #define FABRIC_MN_INITIATOR_ERR_FORCE_0 0x204 -#define FABRIC_MN_INITIATOR_ERR_STATUS_0 0x208 -#define FABRIC_MN_INITIATOR_ERR_OVERFLOW_STATUS_0 0x20c +#define FABRIC_MN_INITIATOR_ERR_STATUS_0 0x208 +#define FABRIC_MN_INITIATOR_ERR_OVERFLOW_STATUS_0 0x20c =20 #define FABRIC_MN_INITIATOR_LOG_ERR_STATUS_0 0x300 -#define FABRIC_MN_INITIATOR_LOG_ADDR_LOW_0 0x304 +#define FABRIC_MN_INITIATOR_LOG_ADDR_LOW_0 0x304 #define FABRIC_MN_INITIATOR_LOG_ADDR_HIGH_0 0x308 #define FABRIC_MN_INITIATOR_LOG_ATTRIBUTES0_0 0x30c #define FABRIC_MN_INITIATOR_LOG_ATTRIBUTES1_0 0x310 @@ -320,6 +324,23 @@ static void tegra234_sw_lookup_target_timeout(struct s= eq_file *file, struct tegr } } =20 +static void tegra234_hw_lookup_target_timeout(struct seq_file *file, struc= t tegra234_cbb *cbb, + u8 target_id, u8 fab_id) +{ + unsigned int notifier =3D cbb->fabric->notifier_offset; + u32 hi, lo; + u64 addr; + + writel(target_id, cbb->regs + notifier + FABRIC_EN_CFG_TARGET_NODE_ADDR_I= NDEX_0_0); + + hi =3D readl(cbb->regs + notifier + FABRIC_EN_CFG_TARGET_NODE_ADDR_HI_0); + lo =3D readl(cbb->regs + notifier + FABRIC_EN_CFG_TARGET_NODE_ADDR_LOW_0); + + addr =3D (u64)hi << 32 | lo; + + tegra_cbb_print_err(file, "\t Target Node Addr : %#llx\n", addr); +} + static void tegra234_cbb_print_error(struct seq_file *file, struct tegra23= 4_cbb *cbb, u32 status, u32 overflow) { @@ -445,8 +466,18 @@ static void print_errlog_err(struct seq_file *file, st= ruct tegra234_cbb *cbb) if (!cbb->fabric->fab_list[fab_id].is_lookup) return; =20 - if (!strcmp(cbb->fabric->errors[cbb->type].code, "TIMEOUT_ERR")) - tegra234_sw_lookup_target_timeout(file, cbb, target_id, fab_id); + /* + * If is_lookup field is set in fabric_lookup table of soc data, it + * means that address lookup of target is supported for Timeout errors. + * If is_lookup is set and the target_map is not populated making + * max_targets as zero, then it means HW lookup is to be performed. + */ + if (!strcmp(cbb->fabric->errors[cbb->type].code, "TIMEOUT_ERR")) { + if (cbb->fabric->fab_list[fab_id].max_targets) + tegra234_sw_lookup_target_timeout(file, cbb, target_id, fab_id); + else + tegra234_hw_lookup_target_timeout(file, cbb, target_id, fab_id); + } =20 return; } --=20 2.25.1