[PATCH 1/3] hw/cxl/cxl-mailbox-utils.c: Added support for Get Log Capabilities (Opcode 0402h)

[Arpit Kumar <arpit1.kumar@samsung.com>]

Signed-off-by: Arpit Kumar <arpit1.kumar@samsung.com>
Reviewed-by: Alok Rathore <alok.rathore@samsung.com>
Reviewed-by: Krishna Kanth Reddy <krish.reddy@samsung.com>
---
 hw/cxl/cxl-mailbox-utils.c   | 55 ++++++++++++++++++++++++++++++++++++
 include/hw/cxl/cxl_device.h  | 31 ++++++++++++++++++++
 include/hw/cxl/cxl_mailbox.h |  5 ++++
 3 files changed, 91 insertions(+)

diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index 9c7ea5bc35..3d66a425a9 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -76,6 +76,7 @@ enum {
     LOGS        = 0x04,
         #define GET_SUPPORTED 0x0
         #define GET_LOG       0x1
+        #define GET_LOG_CAPABILITIES   0x2
     FEATURES    = 0x05,
         #define GET_SUPPORTED 0x0
         #define GET_FEATURE   0x1
@@ -1075,6 +1076,45 @@ static CXLRetCode cmd_logs_get_log(const struct cxl_cmd *cmd,
     return CXL_MBOX_SUCCESS;
 }
 
+static int32_t valid_log_check(QemuUUID *uuid, CXLCCI *cci)
+{
+    int32_t id = -1;
+    for (int i = CEL; i < MAX_LOG_TYPE; i++) {
+        if (qemu_uuid_is_equal(uuid,
+            &cci->supported_log_cap[i].uuid)) {
+            id = i;
+            break;
+        }
+    }
+    return id;
+}
+
+/* CXL r3.1 Section 8.2.9.5.3: Get Log Capabilities (Opcode 0402h) */
+static CXLRetCode cmd_logs_get_log_capabilities(const struct cxl_cmd *cmd,
+                                                uint8_t *payload_in,
+                                                size_t len_in,
+                                                uint8_t *payload_out,
+                                                size_t *len_out,
+                                                CXLCCI *cci)
+{
+    int32_t cap_id;
+    struct {
+        QemuUUID uuid;
+    } QEMU_PACKED QEMU_ALIGNED(8) * get_log_capabilities_in = (void *)payload_in;
+
+    CXLParamFlags *get_log_capabilities_out = (void *)payload_out;
+
+    cap_id = valid_log_check(&get_log_capabilities_in->uuid, cci);
+    if (cap_id == -1) {
+        return CXL_MBOX_INVALID_LOG;
+    }
+
+    memcpy(get_log_capabilities_out, &cci->supported_log_cap[cap_id].param_flags.pflags,
+           sizeof(CXLParamFlags));
+    *len_out = sizeof(*get_log_capabilities_out);
+    return CXL_MBOX_SUCCESS;
+}
+
 /* CXL r3.1 section 8.2.9.6: Features */
 /*
  * Get Supported Features output payload
@@ -2840,6 +2880,8 @@ static const struct cxl_cmd cxl_cmd_set[256][256] = {
     [LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported,
                               0, 0 },
     [LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 },
+    [LOGS][GET_LOG_CAPABILITIES] = { "LOGS_GET_LOG_CAPABILITIES",
+                                     cmd_logs_get_log_capabilities, 0x10, 0 },
     [FEATURES][GET_SUPPORTED] = { "FEATURES_GET_SUPPORTED",
                                   cmd_features_get_supported, 0x8, 0 },
     [FEATURES][GET_FEATURE] = { "FEATURES_GET_FEATURE",
@@ -3084,10 +3126,23 @@ static void cxl_rebuild_cel(CXLCCI *cci)
     }
 }
 
+static const struct CXLLogCapabilities cxl_get_log_cap[MAX_LOG_TYPE] = {
+    [CEL] = {.param_flags.pflags = CXL_LOG_CAP_CLEAR | CXL_LOG_CAP_POPULATE,
+             .uuid = cel_uuid},
+};
+
+static void cxl_init_get_log(CXLCCI *cci)
+{
+    for (int set = CEL; set < MAX_LOG_TYPE; set++) {
+        cci->supported_log_cap[set] = cxl_get_log_cap[set];
+    }
+}
+
 void cxl_init_cci(CXLCCI *cci, size_t payload_max)
 {
     cci->payload_max = payload_max;
     cxl_rebuild_cel(cci);
+    cxl_init_get_log(cci);
 
     cci->bg.complete_pct = 0;
     cci->bg.starttime = 0;
diff --git a/include/hw/cxl/cxl_device.h b/include/hw/cxl/cxl_device.h
index a64739be25..e7cb99a1d2 100644
--- a/include/hw/cxl/cxl_device.h
+++ b/include/hw/cxl/cxl_device.h
@@ -164,6 +164,18 @@ typedef enum {
     CXL_MBOX_MAX = 0x20
 } CXLRetCode;
 
+/* types of logs */
+enum Logs {
+    CEL,
+    VDL,
+    CSDL,
+    ECSL,
+    MTCL,
+    MTRSL,
+    MTRLL,
+    MAX_LOG_TYPE
+};
+
 typedef struct CXLCCI CXLCCI;
 typedef struct cxl_device_state CXLDeviceState;
 struct cxl_cmd;
@@ -194,6 +206,22 @@ typedef struct CXLEventLog {
     QSIMPLEQ_HEAD(, CXLEvent) events;
 } CXLEventLog;
 
+typedef struct CXLParamFlags {
+    union {
+        uint32_t clear_log_supported:1;
+        uint32_t populate_log_supported:1;
+        uint32_t auto_populate_supported:1;
+        uint32_t persistent_across_cold_reset:1;
+        uint32_t reserved:28;
+        uint32_t pflags;
+    };
+} CXLParamFlags;
+
+typedef struct CXLLogCapabilities {
+    CXLParamFlags param_flags;
+    QemuUUID uuid;
+} CXLLogCapabilities;
+
 typedef struct CXLCCI {
     struct cxl_cmd cxl_cmd_set[256][256];
     struct cel_log {
@@ -202,6 +230,9 @@ typedef struct CXLCCI {
     } cel_log[1 << 16];
     size_t cel_size;
 
+    /* get log capabilities */
+    CXLLogCapabilities supported_log_cap[MAX_LOG_TYPE];
+
     /* background command handling (times in ms) */
     struct {
         uint16_t opcode;
diff --git a/include/hw/cxl/cxl_mailbox.h b/include/hw/cxl/cxl_mailbox.h
index 9008402d1c..f3502c3f68 100644
--- a/include/hw/cxl/cxl_mailbox.h
+++ b/include/hw/cxl/cxl_mailbox.h
@@ -16,4 +16,9 @@
 #define CXL_MBOX_BACKGROUND_OPERATION (1 << 6)
 #define CXL_MBOX_BACKGROUND_OPERATION_ABORT (1 << 7)
 
+#define CXL_LOG_CAP_CLEAR 1
+#define CXL_LOG_CAP_POPULATE (1 << 1)
+#define CXL_LOG_CAP_AUTO_POPULATE (1 << 2)
+#define CXL_LOG_CAP_PERSISTENT_COLD_RESET (1 << 3)
+
 #endif
-- 
2.34.1