[RFC PATCH v3 27/31] hw/cxl/device: Add some trivial commands

[Ben Widawsky <ben.widawsky@intel.com>]

GET_FW_INFO and GET_PARTITION_INFO, for this emulation, is equivalent to
info already returned in the IDENTIFY command. To have a more robust
implementation, add those.

Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
---
 hw/cxl/cxl-mailbox-utils.c | 65 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index f92dfad882..dc8e0eb08e 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -43,6 +43,8 @@ enum {
         #define CLEAR_RECORDS   0x1
         #define GET_INTERRUPT_POLICY   0x2
         #define SET_INTERRUPT_POLICY   0x3
+    FIRMWARE_UPDATE = 0x02,
+        #define GET_INFO      0x0
     TIMESTAMP   = 0x03,
         #define GET           0x0
         #define SET           0x1
@@ -51,6 +53,8 @@ enum {
         #define GET_LOG       0x1
     IDENTIFY    = 0x40,
         #define MEMORY_DEVICE 0x0
+    CCLS        = 0x41,
+        #define GET_PARTITION_INFO     0x0
 };
 
 /* 8.2.8.4.5.1 Command Return Codes */
@@ -125,11 +129,13 @@ define_mailbox_handler_zeroed(EVENTS_GET_RECORDS, 0x20);
 define_mailbox_handler_nop(EVENTS_CLEAR_RECORDS);
 define_mailbox_handler_zeroed(EVENTS_GET_INTERRUPT_POLICY, 4);
 define_mailbox_handler_nop(EVENTS_SET_INTERRUPT_POLICY);
+declare_mailbox_handler(FIRMWARE_UPDATE_GET_INFO);
 declare_mailbox_handler(TIMESTAMP_GET);
 declare_mailbox_handler(TIMESTAMP_SET);
 declare_mailbox_handler(LOGS_GET_SUPPORTED);
 declare_mailbox_handler(LOGS_GET_LOG);
 declare_mailbox_handler(IDENTIFY_MEMORY_DEVICE);
+declare_mailbox_handler(CCLS_GET_PARTITION_INFO);
 
 #define IMMEDIATE_CONFIG_CHANGE (1 << 1)
 #define IMMEDIATE_POLICY_CHANGE (1 << 3)
@@ -143,15 +149,50 @@ static struct cxl_cmd cxl_cmd_set[256][256] = {
     CXL_CMD(EVENTS, CLEAR_RECORDS, ~0, IMMEDIATE_LOG_CHANGE),
     CXL_CMD(EVENTS, GET_INTERRUPT_POLICY, 0, 0),
     CXL_CMD(EVENTS, SET_INTERRUPT_POLICY, 4, IMMEDIATE_CONFIG_CHANGE),
+    CXL_CMD(FIRMWARE_UPDATE, GET_INFO, 0, 0),
     CXL_CMD(TIMESTAMP, GET, 0, 0),
     CXL_CMD(TIMESTAMP, SET, 8, IMMEDIATE_POLICY_CHANGE),
     CXL_CMD(LOGS, GET_SUPPORTED, 0, 0),
     CXL_CMD(LOGS, GET_LOG, 0x18, 0),
     CXL_CMD(IDENTIFY, MEMORY_DEVICE, 0, 0),
+    CXL_CMD(CCLS, GET_PARTITION_INFO, 0, 0),
 };
 
 #undef CXL_CMD
 
+/*
+ * 8.2.9.2.1
+ */
+define_mailbox_handler(FIRMWARE_UPDATE_GET_INFO)
+{
+    struct {
+        uint8_t slots_supported;
+        uint8_t slot_info;
+        uint8_t caps;
+        uint8_t rsvd[0xd];
+        char fw_rev1[0x10];
+        char fw_rev2[0x10];
+        char fw_rev3[0x10];
+        char fw_rev4[0x10];
+    } __attribute__((packed)) *fw_info;
+    _Static_assert(sizeof(*fw_info) == 0x50, "Bad firmware info size");
+
+    if (memory_region_size(cxl_dstate->pmem) < (256 << 20)) {
+        return CXL_MBOX_INTERNAL_ERROR;
+    }
+
+    fw_info = (void *)cmd->payload;
+    memset(fw_info, 0, sizeof(*fw_info));
+
+    fw_info->slots_supported = 2;
+    fw_info->slot_info = BIT(0) | BIT(3);
+    fw_info->caps = 0;
+    snprintf(fw_info->fw_rev1, 0x10, "BWFW VERSION %02d", 0);
+
+    *len = sizeof(*fw_info);
+    return CXL_MBOX_SUCCESS;
+}
+
 /*
  * 8.2.9.3.1
  */
@@ -296,6 +337,30 @@ define_mailbox_handler(IDENTIFY_MEMORY_DEVICE)
     return CXL_MBOX_SUCCESS;
 }
 
+define_mailbox_handler(CCLS_GET_PARTITION_INFO)
+{
+    struct {
+        uint64_t active_vmem;
+        uint64_t active_pmem;
+        uint64_t next_vmem;
+        uint64_t next_pmem;
+    } __attribute__((packed)) *part_info = (void *)cmd->payload;
+    _Static_assert(sizeof(*part_info) == 0x20, "Bad get partition info size");
+
+    if (memory_region_size(cxl_dstate->pmem) < (256 << 20)) {
+        return CXL_MBOX_INTERNAL_ERROR;
+    }
+
+    /* PMEM only */
+    part_info->active_vmem = 0;
+    part_info->next_vmem = 0;
+    part_info->active_pmem = memory_region_size(cxl_dstate->pmem);
+    part_info->next_pmem = part_info->active_pmem;
+
+    *len = sizeof(*part_info);
+    return CXL_MBOX_SUCCESS;
+}
+
 void cxl_process_mailbox(CXLDeviceState *cxl_dstate)
 {
     uint16_t ret = CXL_MBOX_SUCCESS;
-- 
2.30.0