From: Anisa Su <anisa...@samsung.com>
FM DCD Management command 0x5601 implemented per CXL r3.2 Spec Section 7.6.7.6.2
Signed-off-by: Anisa Su <anisa...@samsung.com>
---
hw/cxl/cxl-mailbox-utils.c | 102 +++++++++++++++++++++++++++++++++++
include/hw/cxl/cxl_opcodes.h | 1 +
2 files changed, 103 insertions(+)
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index d3c69233b8..6afc45833d 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -3326,6 +3326,106 @@ 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 dsmas_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].dsmas_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 },
@@ -3450,6 +3550,8 @@ 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 },
};
/*
diff --git a/include/hw/cxl/cxl_opcodes.h b/include/hw/cxl/cxl_opcodes.h
index c4c233665e..68ad68291c 100644
--- a/include/hw/cxl/cxl_opcodes.h
+++ b/include/hw/cxl/cxl_opcodes.h
@@ -63,5 +63,6 @@ enum {
#define GET_MHD_INFO 0x0
FMAPI_DCD_MGMT = 0x56,
#define GET_DCD_INFO 0x0
+ #define GET_HOST_DC_REGION_CONFIG 0x1
GLOBAL_MEMORY_ACCESS_EP_MGMT = 0X59
};
--
2.47.2
