diff mbox series

[v12,14/23] sfc: get endpoint decoder

Message ID 20250331144555.1947819-15-alejandro.lucero-palau@amd.com
State New
Headers show
Series cxl: add type2 device basic support | expand

Commit Message

Lucero Palau, Alejandro March 31, 2025, 2:45 p.m. UTC 
From: Alejandro Lucero <alucerop@amd.com>

Use cxl api for getting DPA (Device Physical Address) to use through an
endpoint decoder.

Signed-off-by: Alejandro Lucero <alucerop@amd.com>
Reviewed-by: Martin Habets <habetsm.xilinx@gmail.com>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/net/ethernet/sfc/efx_cxl.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c
index 4395435af576..20eb1dfa8c65 100644
--- a/drivers/net/ethernet/sfc/efx_cxl.c
+++ b/drivers/net/ethernet/sfc/efx_cxl.c
@@ -104,19 +104,31 @@  int efx_cxl_init(struct efx_probe_data *probe_data)
 		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);
-		return rc;
+		goto sfc_put_decoder;
+	}
+
+	cxl->cxled = cxl_request_dpa(cxl->cxlmd, true, EFX_CTPIO_BUFFER_SIZE);
+	if (IS_ERR(cxl->cxled)) {
+		pci_err(pci_dev, "CXL accel request DPA failed");
+		rc = PTR_ERR(cxl->cxled);
+		goto sfc_put_decoder;
 	}
 
 	probe_data->cxl = cxl;
 
 	return 0;
+
+sfc_put_decoder:
+	cxl_put_root_decoder(cxl->cxlrd);
+	return rc;
 }
 
 void efx_cxl_exit(struct efx_probe_data *probe_data)
 {
-	if (probe_data->cxl)
+	if (probe_data->cxl) {
+		cxl_dpa_free(probe_data->cxl->cxled);
 		cxl_put_root_decoder(probe_data->cxl->cxlrd);
+	}
 }
 
 MODULE_IMPORT_NS("CXL");