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From: Vinayak Holikatti <vinayak.kh@samsung.com>
To: qemu-devel@nongnu.org
Cc: krish.reddy@samsung.com, vishak.g@samsung.com, a.manzanares@samsung.com,
alok.rathore@samsung.com, s5.kumari@samsung.com, Vinayak Holikatti
<vinayak.kh@samsung.com>
Subject: [PATCH 1/2] hw/cxl/cxl-mailbox-utils: Add support for Media
operations discovery commands (8.2.9.9.5.3)
Date: Thu, 23 Jan 2025 10:39:02 +0530
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CXL spec 3.1 section 8.2.9.9.5.3 describes media operations commands.
CXL devices supports media operations discovery command.
Signed-off-by: Vinayak Holikatti <vinayak.kh@samsung.com>
---
hw/cxl/cxl-mailbox-utils.c | 130 ++++++++++++++++++++++++++++++++++++-
1 file changed, 128 insertions(+), 2 deletions(-)
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index 9c7ea5bc35..2315d07fb1 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -87,8 +87,9 @@ enum {
#define GET_LSA 0x2
#define SET_LSA 0x3
SANITIZE =3D 0x44,
- #define OVERWRITE 0x0
- #define SECURE_ERASE 0x1
+ #define OVERWRITE 0x0
+ #define SECURE_ERASE 0x1
+ #define MEDIA_OPERATIONS 0x2
PERSISTENT_MEM =3D 0x45,
#define GET_SECURITY_STATE 0x0
MEDIA_AND_POISON =3D 0x43,
@@ -1721,6 +1722,127 @@ static CXLRetCode cmd_sanitize_overwrite(const stru=
ct cxl_cmd *cmd,
return CXL_MBOX_BG_STARTED;
}
=20
+enum {
+ MEDIA_OP_GENERAL =3D 0x0,
+ MEDIA_OP_SANITIZE =3D 0x1,
+ MEDIA_OP_CLASS_MAX,
+} MEDIA_OPERATION_CLASS;
+
+enum {
+ MEDIA_OP_SUB_DISCOVERY =3D 0x0,
+ MEDIA_OP_SUB_SANITIZE =3D 0x0,
+ MEDIA_OP_SUB_ZERO =3D 0x1,
+ MEDIA_OP_SUB_CLASS_MAX
+} MEDIA_OPERATION_SUB_CLASS;
+
+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[0];
+};
+
+#define MAX_SUPPORTED_OPS 3
+struct media_op_supported_list_entry media_op_matrix[MAX_SUPPORTED_OPS] =
=3D {
+ {0, 0},
+ {1, 0},
+ {1, 1} };
+
+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;
+ union {
+ struct {
+ uint64_t starting_dpa;
+ uint64_t length;
+ } dpa_range_list[0];
+ struct {
+ uint16_t start_index;
+ uint16_t num_supported_ops;
+ } discovery_osa;
+ };
+ } QEMU_PACKED *media_op_in_pl =3D (void *)payload_in;
+
+ uint8_t media_op_cl =3D media_op_in_pl->media_operation_class;
+ uint8_t media_op_subclass =3D media_op_in_pl->media_operation_subclass;
+ uint32_t dpa_range_count =3D media_op_in_pl->dpa_range_count;
+
+ if (len_in < sizeof(*media_op_in_pl)) {
+ return CXL_MBOX_INVALID_PAYLOAD_LENGTH;
+ }
+
+ switch (media_op_cl) {
+ case MEDIA_OP_GENERAL:
+ switch (media_op_subclass) {
+ case MEDIA_OP_SUB_DISCOVERY:
+ int count =3D 0;
+ struct media_op_discovery_out_pl *media_out_pl =3D
+ (void *)payload_out;
+ int num_ops =3D media_op_in_pl->discovery_osa.num_supported_op=
s;
+ int start_index =3D media_op_in_pl->discovery_osa.start_index;
+
+ /* As per spec CXL 3.1 8.2.9.9.5.3 dpa_range_count */
+ /* should be zero for discovery sub class command */
+ if (dpa_range_count) {
+ return CXL_MBOX_INVALID_INPUT;
+ }
+
+ if ((start_index >=3D MEDIA_OP_CLASS_MAX) ||
+ (num_ops > MAX_SUPPORTED_OPS)) {
+ return CXL_MBOX_INVALID_INPUT;
+ }
+
+ media_out_pl->dpa_range_granularity =3D CXL_CAPACITY_MULTIPLIE=
R;
+ media_out_pl->total_supported_operations =3D MAX_SUPPORTED_OPS;
+ if (num_ops > 0) {
+ for (int i =3D start_index; i < MAX_SUPPORTED_OPS; i++) {
+ media_out_pl->entry[count].media_op_class =3D
+ media_op_matrix[i].media_op_class;
+ media_out_pl->entry[count].media_op_subclass =3D
+ media_op_matrix[i].media_op_subclass;
+ count++;
+ if (count =3D=3D num_ops) {
+ goto disc_out;
+ }
+ }
+ }
+disc_out:
+ media_out_pl->num_of_supported_operations =3D count;
+ *len_out =3D sizeof(struct media_op_discovery_out_pl) +
+ (sizeof(struct media_op_supported_list_entry) * count);
+ break;
+ default:
+ return CXL_MBOX_UNSUPPORTED;
+ }
+ break;
+ case MEDIA_OP_SANITIZE:
+ switch (media_op_subclass) {
+
+ default:
+ return CXL_MBOX_UNSUPPORTED;
+ }
+ break;
+ default:
+ return CXL_MBOX_UNSUPPORTED;
+ }
+
+ return CXL_MBOX_SUCCESS;
+}
+
static CXLRetCode cmd_get_security_state(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
@@ -2864,6 +2986,10 @@ static const struct cxl_cmd cxl_cmd_set[256][256] =
=3D {
CXL_MBOX_SECURITY_STATE_CHANGE |
CXL_MBOX_BACKGROUND_OPERATION |
CXL_MBOX_BACKGROUND_OPERATION_ABORT)},
+ [SANITIZE][MEDIA_OPERATIONS] =3D { "MEDIA_OPERATIONS", cmd_media_opera=
tions,
+ ~0,
+ (CXL_MBOX_IMMEDIATE_DATA_CHANGE |
+ CXL_MBOX_BACKGROUND_OPERATION)},
[PERSISTENT_MEM][GET_SECURITY_STATE] =3D { "GET_SECURITY_STATE",
cmd_get_security_state, 0, 0 },
[MEDIA_AND_POISON][GET_POISON_LIST] =3D { "MEDIA_AND_POISON_GET_POISON=
_LIST",
--=20
2.34.1