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Tue, 27 Oct 2026 04:24:04 -0500 From: Abhijit Gangurde To: , CC: , , , , , "Abhijit Gangurde" Subject: [for-next 1/3] RDMA/ionic: size the MR PTE reservation to max_sg Date: Tue, 27 Oct 2026 14:53:51 +0530 Message-ID: <20261027092353.1961552-1-abhijit.gangurde@amd.com> X-Mailer: git-send-email 2.43.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH3PEPF00059619:EE_|SJ2PR12MB8805:EE_ X-MS-Office365-Filtering-Correlation-Id: ae979c87-d712-45ab-d8c2-08df340c0cf9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|23010399003|1800799024|376014|82310400026|261009223027099003|261022105027099003|261021123027099003|261021121427099003|261021135927099003|10067099003|56012099006|18002099003|11063799006|261026140227099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 4UHGrKwh9ksqcZFyp4lb8WKoxs9ivnjUU1QqUXoHAoGs/N/ptyZuQeJIO1EH8DoQtoYPAD/Wzshy/TuftvHkjZ9jF2PE4IAadBv29T1AKuFh/ptYJxnUKeXq7J4y68nabAVQgbQcCumxOVfPuqA9L1ZcXWPETDk7lJFr/WYf/VF999gMuA7qYuNB0zQadw7aGMremDJUPtraWH9Q7UjU1ubMOs1/JxFEPO7ltA9cL4t8+OFfbR296CrPQ1l8VDe+flAXD66OYu4VMG6kclcjJaflAWgVMSQOSIIb8Lyy2y6MNnYfEVdcplxjimE8yJVWifxHQwde6411sRRkCGyozq9Ushq1wElyr/160mpIQaJvozEiumf3TtoppWySmBPRwEMEck632do83vhLwpRfu9FvSm7Pooylrwl+FhwW+Z9nielSAGJ4mqb4ySGDw9fq X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Oct 2026 09:24:07.1211 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ae979c87-d712-45ab-d8c2-08df340c0cf9 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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: PH3PEPF00059619.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8805 From: Amit Kumar CREATE_MR with map_count zero makes firmware reserve its default number of PTEs. A fast-registration memory region (MR) whose max_sg is larger than that default fails at REG_MR. Pass max_sg as map_count. The virtual address (VA) and length stay zero because no buffer is mapped yet. Fixes: e8521822c733 ("RDMA/ionic: Register device ops for control path") Signed-off-by: Amit Kumar Signed-off-by: Abhijit Gangurde --- .../infiniband/hw/ionic/ionic_controlpath.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/infiniband/hw/ionic/ionic_controlpath.c b/drivers/infiniband/hw/ionic/ionic_controlpath.c index 18ad967812f5..00f9086f3bab 100644 --- a/drivers/infiniband/hw/ionic/ionic_controlpath.c +++ b/drivers/infiniband/hw/ionic/ionic_controlpath.c @@ -1121,21 +1121,25 @@ struct ib_mr *ionic_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type type, mr->flags = IONIC_MRF_PHYS_MR; - rc = ionic_pgtbl_init(dev, &mr->buf, mr->umem, 0, max_sg, PAGE_SIZE); + mr->buf.tbl_pages = max_sg; + rc = ionic_create_mr_cmd(dev, pd, mr, 0, 0); + if (rc) + goto err_cmd; + + rc = ionic_pgtbl_init(dev, &mr->buf, NULL, 0, max_sg, 0); if (rc) goto err_pgtbl; + /* NIC reservation was already posted. tbl_pages means "mapped". */ mr->buf.tbl_pages = 0; - rc = ionic_create_mr_cmd(dev, pd, mr, 0, 0); - if (rc) - goto err_cmd; - return &mr->ibmr; -err_cmd: - ionic_pgtbl_unbuf(dev, &mr->buf); err_pgtbl: + /* Keep the id if the NIC still holds the MR. */ + if (ionic_destroy_mr_cmd(dev, mr->mrid)) + goto err_mrid; +err_cmd: ionic_put_mrid(dev, mr->mrid); err_mrid: kfree(mr); -- 2.43.0