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Rao" To: CC: , , , , , , , , Vamsi Atluri Subject: [PATCH net-next v6 6/6] pds_core: add debugfs support for host backed memory Date: Mon, 29 Jun 2026 23:02:00 +0000 Message-ID: <20260629230200.82092-7-nikhil.rao@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260629230200.82092-1-nikhil.rao@amd.com> References: <20260629230200.82092-1-nikhil.rao@amd.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: satlexmb07.amd.com (10.181.42.216) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BY1PEPF0001AE1C:EE_|CH3PR12MB8933:EE_ X-MS-Office365-Filtering-Correlation-Id: b3b0f529-5004-42be-0014-08ded63280c4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|36860700016|1800799024|23010399003|6133799003|22082099003|11063799006|56012099006|18002099003; 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:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(82310400026)(376014)(36860700016)(1800799024)(23010399003)(6133799003)(22082099003)(11063799006)(56012099006)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: Rhi9Cqt5JVUEeu+ZpobsmoyWt6L+wcDG8supJsos84nY45BiDZ9pMZl3kZQkJbDAIcurqrGiyyRGMO3WVdyv6lmUw76amnNR91KaptFFP9GnyhP19jE192I500k60Jow6lbIpZRi6BHcBKheUKUDqAhm99/KST+ejC3TAHXh+lt57dpnGK5Q/c+94h1bWkbiUQ8Tu8kszFw0XPVQJwlLWrLr0SAB3ITMhMkNDzjqd28xMAmpyt6O2IVjVuQUUV7mH2daqNK+nf0vZ0bu9jrIcw5j+Ed5zMxcLupYPg9x9kgl1IfNpge4x39vk9qQOYRooFkXcsxQG/DwMRyAorft1eaP5TK0DxkYflJndAeRdy6djYTUylL4cGCpuyR/7Y0d8fy5OFSBQbggigFOXIEPquPQeIe06j9McUbWDJyeu3hM/BJt7UkWcP7U1dwY6Ius X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Jun 2026 23:02:32.9413 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b3b0f529-5004-42be-0014-08ded63280c4 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=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BY1PEPF0001AE1C.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8933 From: Vamsi Atluri Add debugfs file to display host memory allocations including tag, size, order, and physical address for each memory request. Signed-off-by: Vamsi Atluri --- drivers/net/ethernet/amd/pds_core/core.c | 2 + drivers/net/ethernet/amd/pds_core/core.h | 1 + drivers/net/ethernet/amd/pds_core/debugfs.c | 45 +++++++++++++++++++++ 3 files changed, 48 insertions(+) diff --git a/drivers/net/ethernet/amd/pds_core/core.c b/drivers/net/ethernet/amd/pds_core/core.c index be8d802ca921..dbeda801648c 100644 --- a/drivers/net/ethernet/amd/pds_core/core.c +++ b/drivers/net/ethernet/amd/pds_core/core.c @@ -491,6 +491,7 @@ void pdsc_teardown(struct pdsc *pdsc, bool removing) pdsc->viftype_status = NULL; } + pdsc_debugfs_del_host_mem(pdsc); pdsc_host_mem_free(pdsc); pdsc_dev_uninit(pdsc); @@ -502,6 +503,7 @@ int pdsc_start(struct pdsc *pdsc) pds_core_intr_mask(&pdsc->intr_ctrl[pdsc->adminqcq.intx], PDS_CORE_INTR_MASK_CLEAR); pdsc_host_mem_add(pdsc); + pdsc_debugfs_add_host_mem(pdsc); return 0; } diff --git a/drivers/net/ethernet/amd/pds_core/core.h b/drivers/net/ethernet/amd/pds_core/core.h index 085f2e988aa0..791756a50870 100644 --- a/drivers/net/ethernet/amd/pds_core/core.h +++ b/drivers/net/ethernet/amd/pds_core/core.h @@ -306,6 +306,7 @@ void pdsc_debugfs_add_irqs(struct pdsc *pdsc); void pdsc_debugfs_add_qcq(struct pdsc *pdsc, struct pdsc_qcq *qcq); void pdsc_debugfs_del_qcq(struct pdsc_qcq *qcq); void pdsc_debugfs_add_host_mem(struct pdsc *pdsc); +void pdsc_debugfs_del_host_mem(struct pdsc *pdsc); int pdsc_err_to_errno(enum pds_core_status_code code); bool pdsc_is_fw_running(struct pdsc *pdsc); diff --git a/drivers/net/ethernet/amd/pds_core/debugfs.c b/drivers/net/ethernet/amd/pds_core/debugfs.c index 810a0cd9bcac..ef0a1b7d159b 100644 --- a/drivers/net/ethernet/amd/pds_core/debugfs.c +++ b/drivers/net/ethernet/amd/pds_core/debugfs.c @@ -178,3 +178,48 @@ void pdsc_debugfs_del_qcq(struct pdsc_qcq *qcq) debugfs_remove_recursive(qcq->dentry); qcq->dentry = NULL; } + +static int host_mem_show(struct seq_file *seq, void *v) +{ + struct pdsc *pdsc = seq->private; + struct pdsc_host_mem *hm; + int i; + + if (!pdsc->host_mem_reqs || pdsc->num_host_mem_reqs == 0) { + seq_puts(seq, "No host memory allocated\n"); + return 0; + } + + seq_printf(seq, "Host memory requests: %u\n\n", + pdsc->num_host_mem_reqs); + seq_puts(seq, "Tag Size Order PA\n"); + seq_puts(seq, "--- ---- ----- --\n"); + + for (i = 0; i < pdsc->num_host_mem_reqs; i++) { + hm = &pdsc->host_mem_reqs[i]; + + if (!hm->pg) + continue; + + seq_printf(seq, "%-6u %-12u %-6u %pad\n", + hm->tag, hm->size, hm->order, &hm->pa); + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(host_mem); + +void pdsc_debugfs_add_host_mem(struct pdsc *pdsc) +{ + if (!(pdsc->dev_ident.capabilities & + cpu_to_le64(PDS_CORE_DEV_CAP_HOST_MEM))) + return; + + debugfs_create_file("host_mem", 0400, pdsc->dentry, + pdsc, &host_mem_fops); +} + +void pdsc_debugfs_del_host_mem(struct pdsc *pdsc) +{ + debugfs_lookup_and_remove("host_mem", pdsc->dentry); +} -- 2.43.0