From: Anisa Su <anisa...@samsung.com>
FM DCD Management command 0x5605 implemented per CXL r3.2 Spec Section 7.6.7.6.6
Reviewed-by: Fan Ni <fan...@samsung.com>
Signed-off-by: Anisa Su <anisa...@samsung.com>
Signed-off-by: Jonathan Cameron <jonathan.came...@huawei.com>
Message-Id: <20250714174509.1984430-12-jonathan.came...@huawei.com>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
hw/cxl/cxl-mailbox-utils.c | 88 ++++++++++++++++++++++++++++++++++++++
1 file changed, 88 insertions(+)
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index 5d08525529..68c7cc9891 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -124,6 +124,7 @@ enum {
#define SET_DC_REGION_CONFIG 0x2
#define GET_DC_REGION_EXTENT_LIST 0x3
#define INITIATE_DC_ADD 0x4
+ #define INITIATE_DC_RELEASE 0x5
};
/* CCI Message Format CXL r3.1 Figure 7-19 */
@@ -3645,6 +3646,86 @@ static CXLRetCode cmd_fm_initiate_dc_add(const struct
cxl_cmd *cmd,
}
}
+#define CXL_EXTENT_REMOVAL_POLICY_MASK 0x0F
+#define CXL_FORCED_REMOVAL_MASK (1 << 4)
+/*
+ * CXL r3.2 Section 7.6.7.6.6:
+ * Initiate Dynamic Capacity Release (Opcode 5605h)
+ */
+static CXLRetCode cmd_fm_initiate_dc_release(const struct cxl_cmd *cmd,
+ uint8_t *payload_in,
+ size_t len_in,
+ uint8_t *payload_out,
+ size_t *len_out,
+ CXLCCI *cci)
+{
+ struct {
+ uint16_t host_id;
+ uint8_t flags;
+ uint8_t reg_num;
+ uint64_t length;
+ uint8_t tag[0x10];
+ uint32_t ext_count;
+ CXLDCExtentRaw extents[];
+ } QEMU_PACKED *in = (void *)payload_in;
+ CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
+ int i, rc;
+
+ switch (in->flags & CXL_EXTENT_REMOVAL_POLICY_MASK) {
+ case CXL_EXTENT_REMOVAL_POLICY_PRESCRIPTIVE: {
+ CXLDCExtentList updated_list;
+ uint32_t updated_list_size;
+ g_autofree CXLUpdateDCExtentListInPl *list =
+ g_malloc0(sizeof(*list) +
+ in->ext_count * sizeof(*list->updated_entries));
+
+ convert_raw_extents(in->extents, list, in->ext_count);
+ rc = cxl_detect_malformed_extent_list(ct3d, list);
+ if (rc) {
+ return rc;
+ }
+
+ /*
+ * Fail with Invalid PA if an extent is pending and Forced Removal
+ * flag not set.
+ */
+ if (!(in->flags & CXL_FORCED_REMOVAL_MASK)) {
+ for (i = 0; i < in->ext_count; i++) {
+ CXLDCExtentRaw ext = in->extents[i];
+ /*
+ * Check requested extents don't overlap with pending
+ * extents.
+ */
+ if (cxl_extent_groups_overlaps_dpa_range(
+ &ct3d->dc.extents_pending,
+ ext.start_dpa,
+ ext.len)) {
+ return CXL_MBOX_INVALID_PA;
+ }
+ }
+ }
+
+ rc = cxl_dc_extent_release_dry_run(ct3d,
+ list,
+ &updated_list,
+ &updated_list_size);
+ if (rc) {
+ return rc;
+ }
+ cxl_create_dc_event_records_for_extents(ct3d,
+ DC_EVENT_RELEASE_CAPACITY,
+ in->extents,
+ in->ext_count);
+ return CXL_MBOX_SUCCESS;
+ }
+ default: {
+ qemu_log_mask(LOG_UNIMP,
+ "CXL extent removal policy not supported.\n");
+ return CXL_MBOX_INVALID_INPUT;
+ }
+ }
+}
+
static const struct cxl_cmd cxl_cmd_set[256][256] = {
[INFOSTAT][BACKGROUND_OPERATION_ABORT] = { "BACKGROUND_OPERATION_ABORT",
cmd_infostat_bg_op_abort, 0, 0 },
@@ -3779,6 +3860,13 @@ static const struct cxl_cmd cxl_cmd_set_fm_dcd[256][256]
= {
CXL_MBOX_CONFIG_CHANGE_CXL_RESET |
CXL_MBOX_IMMEDIATE_CONFIG_CHANGE |
CXL_MBOX_IMMEDIATE_DATA_CHANGE) },
+ [FMAPI_DCD_MGMT][INITIATE_DC_RELEASE] = { "INIT_DC_RELEASE",
+ cmd_fm_initiate_dc_release, ~0,
+ (CXL_MBOX_CONFIG_CHANGE_COLD_RESET |
+ CXL_MBOX_CONFIG_CHANGE_CONV_RESET |
+ CXL_MBOX_CONFIG_CHANGE_CXL_RESET |
+ CXL_MBOX_IMMEDIATE_CONFIG_CHANGE |
+ CXL_MBOX_IMMEDIATE_DATA_CHANGE) },
};
/*
--
MST
