From: Vinayak Holikatti <vinayak.kh@samsung.com>
CXL spec 3.2 section 8.2.10.9.5.3 describes media operations commands.
CXL devices supports media operations discovery command.
Signed-off-by: Vinayak Holikatti <vinayak.kh@samsung.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20250305092501.191929-4-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
hw/cxl/cxl-mailbox-utils.c | 125 +++++++++++++++++++++++++++++++++++++
1 file changed, 125 insertions(+)
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index bd25df033a..79b35d1405 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -89,6 +89,7 @@ enum {
SANITIZE = 0x44,
#define OVERWRITE 0x0
#define SECURE_ERASE 0x1
+ #define MEDIA_OPERATIONS 0x2
PERSISTENT_MEM = 0x45,
#define GET_SECURITY_STATE 0x0
MEDIA_AND_POISON = 0x43,
@@ -1705,6 +1706,126 @@ static CXLRetCode cmd_sanitize_overwrite(const struct cxl_cmd *cmd,
return CXL_MBOX_BG_STARTED;
}
+enum {
+ MEDIA_OP_CLASS_GENERAL = 0x0,
+ #define MEDIA_OP_GEN_SUBC_DISCOVERY 0x0
+ MEDIA_OP_CLASS_SANITIZE = 0x1,
+ #define MEDIA_OP_SAN_SUBC_SANITIZE 0x0
+ #define MEDIA_OP_SAN_SUBC_ZERO 0x1
+};
+
+struct media_op_supported_list_entry {
+ uint8_t media_op_class;
+ uint8_t media_op_subclass;
+};
+
+struct media_op_discovery_out_pl {
+ uint64_t dpa_range_granularity;
+ uint16_t total_supported_operations;
+ uint16_t num_of_supported_operations;
+ struct media_op_supported_list_entry entry[];
+} QEMU_PACKED;
+
+static const struct media_op_supported_list_entry media_op_matrix[] = {
+ { MEDIA_OP_CLASS_GENERAL, MEDIA_OP_GEN_SUBC_DISCOVERY },
+ { MEDIA_OP_CLASS_SANITIZE, MEDIA_OP_SAN_SUBC_SANITIZE },
+ { MEDIA_OP_CLASS_SANITIZE, MEDIA_OP_SAN_SUBC_ZERO },
+};
+
+static CXLRetCode media_operations_discovery(uint8_t *payload_in,
+ size_t len_in,
+ uint8_t *payload_out,
+ size_t *len_out)
+{
+ struct {
+ uint8_t media_operation_class;
+ uint8_t media_operation_subclass;
+ uint8_t rsvd[2];
+ uint32_t dpa_range_count;
+ struct {
+ uint16_t start_index;
+ uint16_t num_ops;
+ } discovery_osa;
+ } QEMU_PACKED *media_op_in_disc_pl = (void *)payload_in;
+ struct media_op_discovery_out_pl *media_out_pl =
+ (struct media_op_discovery_out_pl *)payload_out;
+ int num_ops, start_index, i;
+ int count = 0;
+
+ if (len_in < sizeof(*media_op_in_disc_pl)) {
+ return CXL_MBOX_INVALID_PAYLOAD_LENGTH;
+ }
+
+ num_ops = media_op_in_disc_pl->discovery_osa.num_ops;
+ start_index = media_op_in_disc_pl->discovery_osa.start_index;
+
+ /*
+ * As per spec CXL r3.2 8.2.10.9.5.3 dpa_range_count should be zero and
+ * start index should not exceed the total number of entries for discovery
+ * sub class command.
+ */
+ if (media_op_in_disc_pl->dpa_range_count ||
+ start_index > ARRAY_SIZE(media_op_matrix)) {
+ return CXL_MBOX_INVALID_INPUT;
+ }
+
+ media_out_pl->dpa_range_granularity = CXL_CACHE_LINE_SIZE;
+ media_out_pl->total_supported_operations =
+ ARRAY_SIZE(media_op_matrix);
+ if (num_ops > 0) {
+ for (i = start_index; i < start_index + num_ops; i++) {
+ media_out_pl->entry[count].media_op_class =
+ media_op_matrix[i].media_op_class;
+ media_out_pl->entry[count].media_op_subclass =
+ media_op_matrix[i].media_op_subclass;
+ count++;
+ if (count == num_ops) {
+ break;
+ }
+ }
+ }
+
+ media_out_pl->num_of_supported_operations = count;
+ *len_out = sizeof(*media_out_pl) + count * sizeof(*media_out_pl->entry);
+ return CXL_MBOX_SUCCESS;
+}
+
+static CXLRetCode cmd_media_operations(const struct cxl_cmd *cmd,
+ uint8_t *payload_in,
+ size_t len_in,
+ uint8_t *payload_out,
+ size_t *len_out,
+ CXLCCI *cci)
+{
+ struct {
+ uint8_t media_operation_class;
+ uint8_t media_operation_subclass;
+ uint8_t rsvd[2];
+ uint32_t dpa_range_count;
+ } QEMU_PACKED *media_op_in_common_pl = (void *)payload_in;
+ uint8_t media_op_cl = 0;
+ uint8_t media_op_subclass = 0;
+
+ if (len_in < sizeof(*media_op_in_common_pl)) {
+ return CXL_MBOX_INVALID_PAYLOAD_LENGTH;
+ }
+
+ media_op_cl = media_op_in_common_pl->media_operation_class;
+ media_op_subclass = media_op_in_common_pl->media_operation_subclass;
+
+ switch (media_op_cl) {
+ case MEDIA_OP_CLASS_GENERAL:
+ if (media_op_subclass != MEDIA_OP_GEN_SUBC_DISCOVERY) {
+ return CXL_MBOX_UNSUPPORTED;
+ }
+
+ return media_operations_discovery(payload_in, len_in, payload_out,
+ len_out);
+ default:
+ return CXL_MBOX_UNSUPPORTED;
+ }
+}
+
static CXLRetCode cmd_get_security_state(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
@@ -2850,6 +2971,10 @@ static const struct cxl_cmd cxl_cmd_set[256][256] = {
CXL_MBOX_SECURITY_STATE_CHANGE |
CXL_MBOX_BACKGROUND_OPERATION |
CXL_MBOX_BACKGROUND_OPERATION_ABORT)},
+ [SANITIZE][MEDIA_OPERATIONS] = { "MEDIA_OPERATIONS", cmd_media_operations,
+ ~0,
+ (CXL_MBOX_IMMEDIATE_DATA_CHANGE |
+ CXL_MBOX_BACKGROUND_OPERATION)},
[PERSISTENT_MEM][GET_SECURITY_STATE] = { "GET_SECURITY_STATE",
cmd_get_security_state, 0, 0 },
[MEDIA_AND_POISON][GET_POISON_LIST] = { "MEDIA_AND_POISON_GET_POISON_LIST",
--
MST