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Wed, 5 Feb 2025 09:20:18 -0600 From: To: , , , , , , , , CC: Alejandro Lucero Subject: [PATCH v10 15/26] sfc: obtain root decoder with enough HPA free space Date: Wed, 5 Feb 2025 15:19:39 +0000 Message-ID: <20250205151950.25268-16-alucerop@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20250205151950.25268-1-alucerop@amd.com> References: <20250205151950.25268-1-alucerop@amd.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Received-SPF: None (SATLEXMB05.amd.com: alucerop@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF000397B1:EE_|MN0PR12MB6245:EE_ X-MS-Office365-Filtering-Correlation-Id: e5ee7ed4-d71b-4d5c-e2e1-08dd45f89a4f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|36860700013|82310400026|1800799024; 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:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(376014)(36860700013)(82310400026)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Feb 2025 15:20:19.8829 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e5ee7ed4-d71b-4d5c-e2e1-08dd45f89a4f 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: SN1PEPF000397B1.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB6245 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. Make sfc cxl build dependent on CXL region. Signed-off-by: Alejandro Lucero Reviewed-by: Martin Habets Acked-by: Edward Cree Reviewed-by: Jonathan Cameron --- drivers/net/ethernet/sfc/Kconfig | 1 + drivers/net/ethernet/sfc/efx_cxl.c | 23 ++++++++++++++++++++++- 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig index 0ce4a9cd5590..f2bc7f5fbccf 100644 --- a/drivers/net/ethernet/sfc/Kconfig +++ b/drivers/net/ethernet/sfc/Kconfig @@ -69,6 +69,7 @@ config SFC_CXL bool "Solarflare SFC9100-family CXL support" depends on SFC && CXL_BUS && !(SFC=y && CXL_BUS=m) depends on CXL_BUS >= CXL_BUS + depends on CXL_REGION default SFC source "drivers/net/ethernet/sfc/falcon/Kconfig" diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c index 774e1cb4b1cb..a9ff84143e5d 100644 --- a/drivers/net/ethernet/sfc/efx_cxl.c +++ b/drivers/net/ethernet/sfc/efx_cxl.c @@ -25,6 +25,7 @@ int efx_cxl_init(struct efx_probe_data *probe_data) struct pci_dev *pci_dev = efx->pci_dev; DECLARE_BITMAP(expected, CXL_MAX_CAPS); DECLARE_BITMAP(found, CXL_MAX_CAPS); + resource_size_t max_size; struct mds_info sfc_mds_info; struct efx_cxl *cxl; @@ -102,6 +103,24 @@ int efx_cxl_init(struct efx_probe_data *probe_data) goto err_regs; } + cxl->cxlrd = cxl_get_hpa_freespace(cxl->cxlmd, 1, + 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_regs; + } + + 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; + cxl_put_root_decoder(cxl->cxlrd); + goto err_regs; + } + probe_data->cxl = cxl; return 0; @@ -114,8 +133,10 @@ int efx_cxl_init(struct efx_probe_data *probe_data) void efx_cxl_exit(struct efx_probe_data *probe_data) { - if (probe_data->cxl) + if (probe_data->cxl) { + cxl_put_root_decoder(probe_data->cxl->cxlrd); kfree(probe_data->cxl); + } } MODULE_IMPORT_NS("CXL");