[PATCH v9 18/27] sfc: get endpoint decoder

alejandro.lucero-palau
2024-12-30T21:45:29Z

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>
---
drivers/net/ethernet/sfc/efx_cxl.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c
index 9413552d559d..f8f48915d21a 100644
--- a/drivers/net/ethernet/sfc/efx_cxl.c
+++ b/drivers/net/ethernet/sfc/efx_cxl.c
@@ -121,6 +121,14 @@ int efx_cxl_init(struct efx_probe_data *probe_data)
goto err_memdev;
}

+ cxl->cxled = cxl_request_dpa(cxl->cxlmd, true, EFX_CTPIO_BUFFER_SIZE,
+ EFX_CTPIO_BUFFER_SIZE);
+ if (IS_ERR(cxl->cxled)) {
+ pci_err(pci_dev, "CXL accel request DPA failed");
+ rc = PTR_ERR(cxl->cxled);
+ goto err_memdev;
+ }
+
probe_data->cxl = cxl;

return 0;
@@ -137,6 +145,7 @@ int efx_cxl_init(struct efx_probe_data *probe_data)
void efx_cxl_exit(struct efx_probe_data *probe_data)
{
if (probe_data->cxl) {
+ cxl_dpa_free(probe_data->cxl->cxled);
cxl_release_resource(probe_data->cxl->cxlds, CXL_RES_RAM);
kfree(probe_data->cxl->cxlds);
kfree(probe_data->cxl);
--
2.17.1