On Thu, Jun 26, 2025 at 10:23:33PM +0000, [email protected] wrote:
> From: Anisa Su <[email protected]>
>
> FM DCD Management command 0x5605 implemented per CXL r3.2 Spec Section
> 7.6.7.6.6
>
> Signed-off-by: Anisa Su <[email protected]>
> ---
Minor comments inline ...
> hw/cxl/cxl-mailbox-utils.c | 79 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 79 insertions(+)
>
> diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
> index 787eeaa7b9..87f9535d46 100644
> --- a/hw/cxl/cxl-mailbox-utils.c
> +++ b/hw/cxl/cxl-mailbox-utils.c
> @@ -123,6 +123,7 @@ 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 */
> @@ -3638,6 +3639,77 @@ 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) */
/* CXL r3.2 Section 7.6.7.6.6: Initiate Dynamic Capacity Release (Opcode 5605h)
*/
Fan
> +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 },
> @@ -3772,6 +3844,13 @@ 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) },
> };
>
> /*
> --
> 2.47.2
>
--
Fan Ni (From gmail)
