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hw/cxl: mailbox-utils: 0x5601 - FMAPI Get Host Region Config

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FM DCD Management command 0x5601 implemented per CXL r3.2 Spec Section 7.6.7.6.2

Reviewed-by: Fan Ni <fan.ni@samsung.com>
Signed-off-by: Anisa Su <anisa.su@samsung.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20250714174509.1984430-5-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Anisa Su
2025-07-15 02:56:40 -04:00
committed by Michael S. Tsirkin
parent 3d1607cc29
commit a8f1cbbbca
1 changed files with 106 additions and 0 deletions
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hw/cxl/cxl-mailbox-utils.c
+106
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@@ -120,6 +120,7 @@ enum {
#define MANAGEMENT_COMMAND 0x0
FMAPI_DCD_MGMT = 0x56,
#define GET_DCD_INFO 0x0
#define GET_HOST_DC_REGION_CONFIG 0x1
};
/* CCI Message Format CXL r3.1 Figure 7-19 */
@@ -3286,6 +3287,109 @@ static CXLRetCode cmd_fm_get_dcd_info(const struct cxl_cmd *cmd,
return CXL_MBOX_SUCCESS;
}
static void build_dsmas_flags(uint8_t *flags, CXLDCRegion *region)
{
*flags = 0;
if (region->nonvolatile) {
*flags |= BIT(CXL_DSMAS_FLAGS_NONVOLATILE);
}
if (region->sharable) {
*flags |= BIT(CXL_DSMAS_FLAGS_SHARABLE);
}
if (region->hw_managed_coherency) {
*flags |= BIT(CXL_DSMAS_FLAGS_HW_MANAGED_COHERENCY);
}
if (region->ic_specific_dc_management) {
*flags |= BIT(CXL_DSMAS_FLAGS_IC_SPECIFIC_DC_MANAGEMENT);
}
if (region->rdonly) {
*flags |= BIT(CXL_DSMAS_FLAGS_RDONLY);
}
}
/*
* CXL r3.2 section 7.6.7.6.2:
* Get Host DC Region Configuration (Opcode 5601h)
*/
static CXLRetCode cmd_fm_get_host_dc_region_config(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 region_cnt;
uint8_t start_rid;
} QEMU_PACKED *in = (void *)payload_in;
struct {
uint16_t host_id;
uint8_t num_regions;
uint8_t regions_returned;
struct {
uint64_t base;
uint64_t decode_len;
uint64_t region_len;
uint64_t block_size;
uint8_t flags;
uint8_t rsvd1[3];
uint8_t sanitize;
uint8_t rsvd2[3];
} QEMU_PACKED records[];
} QEMU_PACKED *out = (void *)payload_out;
struct {
uint32_t num_extents_supported;
uint32_t num_extents_available;
uint32_t num_tags_supported;
uint32_t num_tags_available;
} QEMU_PACKED *extra_out;
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
uint16_t record_count, out_pl_len, i;
if (in->start_rid >= ct3d->dc.num_regions) {
return CXL_MBOX_INVALID_INPUT;
}
record_count = MIN(ct3d->dc.num_regions - in->start_rid, in->region_cnt);
out_pl_len = sizeof(*out) + record_count * sizeof(out->records[0]);
extra_out = (void *)out + out_pl_len;
out_pl_len += sizeof(*extra_out);
assert(out_pl_len <= CXL_MAILBOX_MAX_PAYLOAD_SIZE);
stw_le_p(&out->host_id, 0);
out->num_regions = ct3d->dc.num_regions;
out->regions_returned = record_count;
for (i = 0; i < record_count; i++) {
stq_le_p(&out->records[i].base,
ct3d->dc.regions[in->start_rid + i].base);
stq_le_p(&out->records[i].decode_len,
ct3d->dc.regions[in->start_rid + i].decode_len /
CXL_CAPACITY_MULTIPLIER);
stq_le_p(&out->records[i].region_len,
ct3d->dc.regions[in->start_rid + i].len);
stq_le_p(&out->records[i].block_size,
ct3d->dc.regions[in->start_rid + i].block_size);
build_dsmas_flags(&out->records[i].flags,
&ct3d->dc.regions[in->start_rid + i]);
/* Sanitize is bit 0 of flags. */
out->records[i].sanitize =
ct3d->dc.regions[in->start_rid + i].flags & BIT(0);
}
stl_le_p(&extra_out->num_extents_supported, CXL_NUM_EXTENTS_SUPPORTED);
stl_le_p(&extra_out->num_extents_available, CXL_NUM_EXTENTS_SUPPORTED -
ct3d->dc.total_extent_count);
stl_le_p(&extra_out->num_tags_supported, CXL_NUM_TAGS_SUPPORTED);
stl_le_p(&extra_out->num_tags_available, CXL_NUM_TAGS_SUPPORTED);
*len_out = out_pl_len;
return CXL_MBOX_SUCCESS;
}
static const struct cxl_cmd cxl_cmd_set[256][256] = {
[INFOSTAT][BACKGROUND_OPERATION_ABORT] = { "BACKGROUND_OPERATION_ABORT",
cmd_infostat_bg_op_abort, 0, 0 },
@@ -3402,6 +3506,8 @@ static const struct cxl_cmd cxl_cmd_set_sw[256][256] = {
static const struct cxl_cmd cxl_cmd_set_fm_dcd[256][256] = {
[FMAPI_DCD_MGMT][GET_DCD_INFO] = { "GET_DCD_INFO",
cmd_fm_get_dcd_info, 0, 0 },
[FMAPI_DCD_MGMT][GET_HOST_DC_REGION_CONFIG] = { "GET_HOST_DC_REGION_CONFIG",
cmd_fm_get_host_dc_region_config, 4, 0 },
};
/*