Map relevant memory backend when host accepted an extent.
Signed-off-by: Alireza Sanaee <[email protected]>
---
hw/cxl/cxl-mailbox-utils.c | 74 ++++++++++++++++++++++++++++++++++++--
1 file changed, 71 insertions(+), 3 deletions(-)
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index ae723c03ec..b785553225 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -2979,6 +2979,30 @@ static CXLRetCode
cxl_detect_malformed_extent_list(CXLType3Dev *ct3d,
return CXL_MBOX_SUCCESS;
}
+static bool cxl_extent_find_extent_detail(CXLDCExtentGroupList *list,
+ uint64_t start_dpa,
+ uint64_t len,
+ uint8_t *tag,
+ HostMemoryBackend **hmb,
+ struct CXLFixedWindow **fw,
+ int *rid)
+{
+ CXLDCExtent *ent, *ent_next;
+ CXLDCExtentGroup *group = QTAILQ_FIRST(list);
+
+ QTAILQ_FOREACH_SAFE(ent, &group->list, node, ent_next) {
+ if (ent->start_dpa == start_dpa && ent->len == len) {
+ *fw = ent->fw;
+ *hmb = ent->hm;
+ memcpy(tag, ent->tag, 0x10);
+ *rid = ent->rid;
+ return true;
+ }
+ }
+
+ return false;
+}
+
static CXLRetCode cxl_dcd_add_dyn_cap_rsp_dry_run(CXLType3Dev *ct3d,
const CXLUpdateDCExtentListInPl *in)
{
@@ -3029,8 +3053,12 @@ static CXLRetCode cmd_dcd_add_dyn_cap_rsp(const struct
cxl_cmd *cmd,
CXLUpdateDCExtentListInPl *in = (void *)payload_in;
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
CXLDCExtentList *extent_list = &ct3d->dc.extents;
+ struct CXLFixedWindow *fw;
+ HostMemoryBackend *hmb_dc;
+ uint8_t tag[0x10];
uint32_t i, num;
uint64_t dpa, len;
+ int rid;
CXLRetCode ret;
if (len_in < sizeof(*in)) {
@@ -3065,12 +3093,52 @@ static CXLRetCode cmd_dcd_add_dyn_cap_rsp(const struct
cxl_cmd *cmd,
}
for (i = 0; i < in->num_entries_updated; i++) {
+ bool found;
+ MemoryRegion *mr;
+
dpa = in->updated_entries[i].start_dpa;
len = in->updated_entries[i].len;
- cxl_insert_extent_to_extent_list(extent_list, NULL,
- NULL, dpa, len,
- NULL, 0, 0);
+ if (ct3d->dc.total_capacity_cmd) {
+ found = cxl_extent_find_extent_detail(
+ &ct3d->dc.extents_pending, dpa, len, tag, &hmb_dc, &fw, &rid);
+
+ /*
+ * This only occurs when host accepts an extent where device does
+ * not know anything about it.
+ */
+ if (!found) {
+ qemu_log("Could not find the extent detail for DPA 0x%" PRIx64
+ " LEN 0x%" PRIx64 "\n",
+ dpa, len);
+ return CXL_MBOX_INVALID_PA;
+ }
+
+ /* The host memory backend should not be already mapped */
+ if (host_memory_backend_is_mapped(hmb_dc)) {
+ qemu_log("The host memory backend for DPA 0x%" PRIx64
+ " LEN 0x%" PRIx64 " is already mapped\n",
+ dpa, len);
+ return CXL_MBOX_INVALID_PA;
+ }
+
+ mr = host_memory_backend_get_memory(hmb_dc);
+ if (!mr) {
+ qemu_log("Could not get memory region from host memory "
+ "backend\n");
+ return CXL_MBOX_INVALID_PA;
+ }
+
+ memory_region_set_nonvolatile(mr, false);
+ memory_region_set_enabled(mr, true);
+ host_memory_backend_set_mapped(hmb_dc, true);
+ cxl_insert_extent_to_extent_list(extent_list, hmb_dc, fw, dpa, len,
+ NULL, 0, rid);
+ } else {
+ cxl_insert_extent_to_extent_list(extent_list, NULL, NULL, dpa, len,
+ NULL, 0, -1);
+ }
+
ct3d->dc.total_extent_count += 1;
ct3d->dc.nr_extents_accepted += 1;
ct3_set_region_block_backed(ct3d, dpa, len);
--
2.43.0
