[PATCH v2 10/10] cxl-mailbox-utils: 0x5605 - FMAPI Initiate DC Release

[anisa . su887]

From: Anisa Su <anisa...@samsung.com>

FM DCD Managment command 0x5605 implemented per CXL r3.2 Spec Section 7.6.7.6.6

Signed-off-by: Anisa Su <anisa...@samsung.com>
---
 hw/cxl/cxl-mailbox-utils.c   | 56 ++++++++++++++++++++++++++++++++++++
 include/hw/cxl/cxl_opcodes.h |  1 +
 2 files changed, 57 insertions(+)

diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index 9b176dea08..28266b16f7 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -3638,6 +3638,10 @@ static CXLRetCode 
cxl_mbox_dc_prescriptive_sanity_check(CXLType3Dev *dcd,
                                                ext.start_dpa, ext.len)) {
                 return CXL_MBOX_INVALID_EXTENT_LIST;
             }
+        } else if (type == DC_EVENT_RELEASE_CAPACITY) {
+            if (!ct3_test_region_block_backed(dcd, ext.start_dpa, ext.len)) {
+                return CXL_MBOX_INVALID_PA;
+            }
         }
     }
 
@@ -3777,6 +3781,51 @@ static CXLRetCode cmd_fm_initiate_dc_add(const struct 
cxl_cmd *cmd,
     return CXL_MBOX_SUCCESS;
 }
 
+#define CXL_EXTENT_REMOVAL_POLICY_MASK 0x7
+/* 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 rc;
+
+    switch (in->flags & CXL_EXTENT_REMOVAL_POLICY_MASK) {
+    case CXL_EXTENT_REMOVAL_POLICY_PRESCRIPTIVE:
+        rc = cxl_mbox_dc_prescriptive_sanity_check(ct3d,
+                                                   in->host_id,
+                                                   in->ext_count,
+                                                   in->extents,
+                                                   DC_EVENT_RELEASE_CAPACITY);
+        if (rc) {
+            return rc;
+        }
+        cxl_mbox_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 selection policy not supported.\n");
+        return CXL_MBOX_INVALID_INPUT;
+    }
+
+    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 },
@@ -3919,6 +3968,13 @@ 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) },
 };
 
 /*
diff --git a/include/hw/cxl/cxl_opcodes.h b/include/hw/cxl/cxl_opcodes.h
index 72ea0a7d44..7ac6cb9f34 100644
--- a/include/hw/cxl/cxl_opcodes.h
+++ b/include/hw/cxl/cxl_opcodes.h
@@ -67,5 +67,6 @@ enum {
         #define SET_DC_REGION_CONFIG 0x2
         #define GET_DC_REGION_EXTENT_LIST 0x3
         #define INITIATE_DC_ADD           0x4
+        #define INITIATE_DC_RELEASE       0x5
     GLOBAL_MEMORY_ACCESS_EP_MGMT = 0X59
 };
-- 
2.47.2