From: Alejandro Lucero <redacted>

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

Signed-off-by: Alejandro Lucero <redacted>
Reviewed-by: Martin Habets <redacted>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/net/ethernet/sfc/efx_cxl.c | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c
index d29594e71027..4461b7a4dc2c 100644
--- a/drivers/net/ethernet/sfc/efx_cxl.c
+++ b/drivers/net/ethernet/sfc/efx_cxl.c

@@ -99,16 +99,23 @@ int efx_cxl_init(struct efx_probe_data *probe_data)
 
 	if (IS_ERR(cxl->cxlrd)) {
 		pci_err(pci_dev, "cxl_get_hpa_freespace failed\n");
-		cxl_release_endpoint(cxl->cxlmd, cxl->endpoint);
-		return PTR_ERR(cxl->cxlrd);
+		rc = PTR_ERR(cxl->cxlrd);
+		goto err_release;

 	}
 
 	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);
-		cxl_put_root_decoder(cxl->cxlrd);
-		cxl_release_endpoint(cxl->cxlmd, cxl->endpoint);
-		return -ENOSPC;
+		rc = -ENOSPC;
+		goto err_decoder;
+	}
+
+	cxl->cxled = cxl_request_dpa(cxl->cxlmd, CXL_PARTMODE_RAM,
+				     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_decoder;
 	}
 
 	probe_data->cxl = cxl;

@@ -116,12 +123,21 @@ int efx_cxl_init(struct efx_probe_data *probe_data)
 	cxl_release_endpoint(cxl->cxlmd, cxl->endpoint);
 
 	return 0;
+
+err_decoder:
+	cxl_put_root_decoder(cxl->cxlrd);
+err_release:
+	cxl_release_endpoint(cxl->cxlmd, cxl->endpoint);
+
+	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");