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Mon, 16 Dec 2024 10:11:14 -0600 From: To: , , , , , , , , , CC: Alejandro Lucero Subject: [PATCH v8 16/27] sfc: obtain root decoder with enough HPA free space Date: Mon, 16 Dec 2024 16:10:31 +0000 Message-ID: <20241216161042.42108-17-alejandro.lucero-palau@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20241216161042.42108-1-alejandro.lucero-palau@amd.com> References: <20241216161042.42108-1-alejandro.lucero-palau@amd.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Received-SPF: None (SATLEXMB03.amd.com: alejandro.lucero-palau@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH1PEPF0000AD7B:EE_|MW4PR12MB7358:EE_ X-MS-Office365-Filtering-Correlation-Id: d120ea23-4ace-4eeb-5c9b-08dd1dec44ae X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|36860700013|82310400026|921020; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Dec 2024 16:11:15.7462 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d120ea23-4ace-4eeb-5c9b-08dd1dec44ae 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH1PEPF0000AD7B.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB7358 X-Patchwork-Delegate: kuba@kernel.org From: Alejandro Lucero Asking for available HPA space is the previous step to try to obtain an HPA range suitable to accel driver purposes. Add this call to efx cxl initialization. Signed-off-by: Alejandro Lucero Reviewed-by: Martin Habets Acked-by: Edward Cree Reviewed-by: Jonathan Cameron --- drivers/net/ethernet/sfc/efx_cxl.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c index 70b47b7f4d5a..253c82c61f43 100644 --- a/drivers/net/ethernet/sfc/efx_cxl.c +++ b/drivers/net/ethernet/sfc/efx_cxl.c @@ -23,6 +23,7 @@ int efx_cxl_init(struct efx_probe_data *probe_data) struct efx_nic *efx = &probe_data->efx; DECLARE_BITMAP(expected, CXL_MAX_CAPS); DECLARE_BITMAP(found, CXL_MAX_CAPS); + resource_size_t max_size; struct pci_dev *pci_dev; struct efx_cxl *cxl; struct resource res; @@ -103,6 +104,23 @@ int efx_cxl_init(struct efx_probe_data *probe_data) goto err_memdev; } + cxl->cxlrd = cxl_get_hpa_freespace(cxl->cxlmd, + CXL_DECODER_F_RAM | CXL_DECODER_F_TYPE2, + &max_size); + + if (IS_ERR(cxl->cxlrd)) { + pci_err(pci_dev, "cxl_get_hpa_freespace failed\n"); + rc = PTR_ERR(cxl->cxlrd); + goto err_memdev; + } + + if (max_size < EFX_CTPIO_BUFFER_SIZE) { + pci_err(pci_dev, "%s: not enough free HPA space %pap < %u\n", + __func__, &max_size, EFX_CTPIO_BUFFER_SIZE); + rc = -ENOSPC; + goto err_memdev; + } + probe_data->cxl = cxl; return 0;