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Rao" To: CC: Brett Creeley , Andrew Lunn , "David S . Miller" , "Eric Dumazet" , Jakub Kicinski , Paolo Abeni , , Eric Joyner , Vamsi Atluri Subject: [PATCH v3 6/6] pds_core: add debugfs support for host backed memory Date: Mon, 8 Jun 2026 22:32:56 +0000 Message-ID: <20260608223256.12357-7-nikhil.rao@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260608223256.12357-1-nikhil.rao@amd.com> References: <20260608223256.12357-1-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 satlexmb09.amd.com (10.181.42.218) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF000397B5:EE_|SA1PR12MB9513:EE_ X-MS-Office365-Filtering-Correlation-Id: 8b71e228-5a75-4c75-59ad-08dec5af009a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|376014|36860700016|11063799006|56012099006|6133799003|18002099003|22082099003; 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)(1800799024)(376014)(36860700016)(11063799006)(56012099006)(6133799003)(18002099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: JZtQXhZ/XG2ZRlYSd63olWFPt1rFUFuXAFUi+Br4J7AEiPa4nTIoxC1BekIkFSwKIvxRGkPYug8ISP5Iz5idaLL2haAROTPQ9t2596PuHEB5xujQaUnjJQkGWfw5vtgE7hCpeX/7hkqmpkWssLH/DW30zx85EsE0BJAukQnp1uVJ8SFNelbIHpRO3K2QvHNjPx7ByWfLMqkFCi9YHBD945reGgi0CznihV+kcgFLZLrDiPjI73jq4ZRr/NcfucfHQgF7q398LwghCImeya8kj+iLfDThQIXdCd2H3Miq+FHiHu3B3YJYPhUlCzDfcS6A7Dx7oDFzV5dCUDMBJN0M5482fy/QS5sAS/FxOr8iKayqX/XebFXIKMvvws1DY/gnPRFWzkQNsrh0fomjKhTuaGEmQuAXh75j4G+v7iItK6GWnzU6dFWSE8ho8fH7vpGD X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jun 2026 22:40:55.2588 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8b71e228-5a75-4c75-59ad-08dec5af009a 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: SN1PEPF000397B5.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB9513 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 249afcd5f5d7..fa73c008d683 100644 --- a/drivers/net/ethernet/amd/pds_core/core.c +++ b/drivers/net/ethernet/amd/pds_core/core.c @@ -487,6 +487,7 @@ 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); @@ -498,6 +499,7 @@ 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 53e5a6f0af9c..b453493c093f 100644 --- a/drivers/net/ethernet/amd/pds_core/core.h +++ b/drivers/net/ethernet/amd/pds_core/core.h @@ -304,6 +304,7 @@ 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