@@ -116,6 +116,7 @@ struct cxl_mbox_cmd {
* @active_persistent_bytes: sum of hard + soft persistent
* @next_volatile_bytes: volatile capacity change pending device reset
* @next_persistent_bytes: persistent capacity change pending device reset
+ * @component_reg_phys: register base of component registers
* @mbox_send: @dev specific transport for transmitting mailbox commands
*
* See section 8.2.9.5.2 Capacity Configuration and Label Storage for
@@ -145,6 +146,8 @@ struct cxl_dev_state {
u64 next_volatile_bytes;
u64 next_persistent_bytes;
+ resource_size_t component_reg_phys;
+
int (*mbox_send)(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd);
};
@@ -416,6 +416,17 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (rc)
return rc;
+ /*
+ * If the component registers can't be found, the cxl_pci driver may
+ * still be useful for management functions so don't return an error.
+ */
+ cxlds->component_reg_phys = CXL_RESOURCE_NONE;
+ rc = cxl_setup_regs(pdev, CXL_REGLOC_RBI_COMPONENT, &map);
+ if (rc)
+ dev_warn(&pdev->dev, "No component registers (%d)\n", rc);
+
+ cxlds->component_reg_phys = cxl_regmap_to_base(pdev, &map);
+
rc = cxl_pci_setup_mailbox(cxlds);
if (rc)
return rc;