From: Shiju Jose <shiju.jose@xxxxxxxxxx>
Add support for SET_FEATURE mailbox command.
CXL spec 3.0 section 8.2.9.6 describes optional device specific features.
CXL devices supports features with changeable attributes.
The settings of a feature can be optionally modified using Set Feature
command.
Signed-off-by: Shiju Jose <shiju.jose@xxxxxxxxxx>
---
drivers/cxl/core/mbox.c | 14 ++++++++++++++
drivers/cxl/cxlmem.h | 27 +++++++++++++++++++++++++++
2 files changed, 41 insertions(+)
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index a50c874edebc..7f379cbb71a0 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -1348,6 +1348,20 @@ int cxl_get_feature(struct cxl_memdev_state *mds,
}
EXPORT_SYMBOL_NS_GPL(cxl_get_feature, CXL);
+int cxl_set_feature(struct cxl_memdev_state *mds, void *feat_in, size_t size)
+{
+ struct cxl_mbox_cmd mbox_cmd;
+
+ mbox_cmd = (struct cxl_mbox_cmd) {
+ .opcode = CXL_MBOX_OP_SET_FEATURE,
+ .size_in = size,
+ .payload_in = feat_in,
+ };
+
+ return cxl_internal_send_cmd(mds, &mbox_cmd);
+}
+EXPORT_SYMBOL_NS_GPL(cxl_set_feature, CXL);
+
int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
struct cxl_region *cxlr)
{
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 92c1f2a44713..46131dcd0900 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -508,6 +508,7 @@ enum cxl_opcode {
CXL_MBOX_OP_GET_LOG = 0x0401,
CXL_MBOX_OP_GET_SUPPORTED_FEATURES = 0x0500,
CXL_MBOX_OP_GET_FEATURE = 0x0501,
+ CXL_MBOX_OP_SET_FEATURE = 0x0502,
CXL_MBOX_OP_IDENTIFY = 0x4000,
CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100,
CXL_MBOX_OP_SET_PARTITION_INFO = 0x4101,
@@ -817,6 +818,31 @@ struct cxl_mbox_get_feat_in {
u8 selection;
} __packed;
+/* Set Feature CXL 3.0 Spec 8.2.9.6.3 */
+/*
+ * Set Feature input payload
+ * CXL rev 3.0 section 8.2.9.6.3; Table 8-81
+ */
+/* Set Feature : Payload in flags */
+#define CXL_SET_FEAT_FLAG_DATA_TRANSFER_MASK GENMASK(2, 0)
+enum cxl_set_feat_flag_data_transfer {
+ CXL_SET_FEAT_FLAG_FULL_DATA_TRANSFER = 0x0,
+ CXL_SET_FEAT_FLAG_INITIATE_DATA_TRANSFER = 0x1,
+ CXL_SET_FEAT_FLAG_CONTINUE_DATA_TRANSFER = 0x2,
+ CXL_SET_FEAT_FLAG_FINISH_DATA_TRANSFER = 0x3,
+ CXL_SET_FEAT_FLAG_ABORT_DATA_TRANSFER = 0x4,
+ CXL_SET_FEAT_FLAG_DATA_TRANSFER_MAX
+};
+#define CXL_SET_FEAT_FLAG_MOD_VALUE_SAVED_ACROSS_RESET BIT(3)
+
+struct cxl_mbox_set_feat_in {
+ uuid_t uuid;
+ __le32 flags;
+ __le16 offset;
+ u8 version;
+ u8 rsvd[9];
+} __packed;
+
/* Get Poison List CXL 3.0 Spec 8.2.9.8.4.1 */
struct cxl_mbox_poison_in {
__le64 offset;
@@ -949,6 +975,7 @@ int cxl_get_supported_features(struct cxl_memdev_state *mds,
void *feats_out);
int cxl_get_feature(struct cxl_memdev_state *mds,
struct cxl_mbox_get_feat_in *pi, void *feat_out);
+int cxl_set_feature(struct cxl_memdev_state *mds, void *feat_in, size_t size);
int cxl_poison_state_init(struct cxl_memdev_state *mds);
int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
struct cxl_region *cxlr);
--
2.34.1
