@@ -1084,6 +1084,41 @@ int cxl_set_feature(struct cxl_memdev_state *mds,
}
EXPORT_SYMBOL_NS_GPL(cxl_set_feature, CXL);
+int cxl_do_maintenance(struct cxl_memdev_state *mds,
+ u8 class, u8 subclass,
+ void *data_in, size_t data_in_size)
+{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
+ struct cxl_memdev_maintenance_pi {
+ struct cxl_mbox_do_maintenance_hdr hdr;
+ u8 data[];
+ } __packed;
+ struct cxl_mbox_cmd mbox_cmd;
+ size_t hdr_size;
+
+ struct cxl_memdev_maintenance_pi *pi __free(kfree) =
+ kmalloc(cxl_mbox->payload_size, GFP_KERNEL);
+ pi->hdr.op_class = class;
+ pi->hdr.op_subclass = subclass;
+ hdr_size = sizeof(pi->hdr);
+ /*
+ * Check minimum mbox payload size is available for
+ * the maintenance data transfer.
+ */
+ if (hdr_size + data_in_size > cxl_mbox->payload_size)
+ return -ENOMEM;
+
+ memcpy(pi->data, data_in, data_in_size);
+ mbox_cmd = (struct cxl_mbox_cmd) {
+ .opcode = CXL_MBOX_OP_DO_MAINTENANCE,
+ .size_in = hdr_size + data_in_size,
+ .payload_in = pi,
+ };
+
+ return cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
+}
+EXPORT_SYMBOL_NS_GPL(cxl_do_maintenance, CXL);
+
/**
* cxl_enumerate_cmds() - Enumerate commands for a device.
* @mds: The driver data for the operation
@@ -533,6 +533,7 @@ enum cxl_opcode {
CXL_MBOX_OP_GET_SUPPORTED_FEATURES = 0x0500,
CXL_MBOX_OP_GET_FEATURE = 0x0501,
CXL_MBOX_OP_SET_FEATURE = 0x0502,
+ CXL_MBOX_OP_DO_MAINTENANCE = 0x0600,
CXL_MBOX_OP_IDENTIFY = 0x4000,
CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100,
CXL_MBOX_OP_SET_PARTITION_INFO = 0x4101,
@@ -909,6 +910,19 @@ struct cxl_mbox_set_feat_hdr {
u8 rsvd[9];
} __packed;
+/*
+ * Perform Maintenance CXL 3.1 Spec 8.2.9.7.1
+ */
+
+/*
+ * Perform Maintenance input payload
+ * CXL rev 3.1 section 8.2.9.7.1 Table 8-102
+ */
+struct cxl_mbox_do_maintenance_hdr {
+ u8 op_class;
+ u8 op_subclass;
+} __packed;
+
int cxl_internal_send_cmd(struct cxl_mailbox *cxl_mbox,
struct cxl_mbox_cmd *cmd);
int cxl_dev_state_identify(struct cxl_memdev_state *mds);
@@ -986,4 +1000,7 @@ int cxl_set_feature(struct cxl_memdev_state *mds,
const uuid_t feat_uuid, u8 feat_version,
void *feat_data, size_t feat_data_size,
u8 feat_flag);
+int cxl_do_maintenance(struct cxl_memdev_state *mds,
+ u8 class, u8 subclass,
+ void *data_in, size_t data_in_size);
#endif /* __CXL_MEM_H__ */