hw/cxl/mbox: replace sanitize_running() with cxl_dev_media_disabled()

The spec states that reads/writes should have no effect and a part of
commands should be ignored when the media is disabled, not when the
sanitize command is running.

Introduce cxl_dev_media_disabled() to check if the media is disabled and
replace sanitize_running() with it.

Make sure that the media has been correctly disabled during sanitation
by adding an assert to __toggle_media(). Now, enabling when already
enabled or vice versa results in an assert() failure.

Suggested-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Link: https://lore.kernel.org/r/20231222090051.3265307-4-42.hyeyoo@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Message-Id: <20240705120643.959422-3-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 17 insertions, 12 deletions

diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index 8ae9c6a699..522d9aa589 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -2108,6 +2108,7 @@ int cxl_process_cci_message(CXLCCI *cci, uint8_t set, uint8_t cmd,
     int ret;
     const struct cxl_cmd *cxl_cmd;
     opcode_handler h;
+    CXLDeviceState *cxl_dstate;
 
     *len_out = 0;
     cxl_cmd = &cci->cxl_cmd_set[set][cmd];
@@ -2128,18 +2129,22 @@ int cxl_process_cci_message(CXLCCI *cci, uint8_t set, uint8_t cmd,
         return CXL_MBOX_BUSY;
     }
 
-    /* forbid any selected commands while overwriting */
-    if (sanitize_running(cci)) {
-        if (h == cmd_events_get_records ||
-            h == cmd_ccls_get_partition_info ||
-            h == cmd_ccls_set_lsa ||
-            h == cmd_ccls_get_lsa ||
-            h == cmd_logs_get_log ||
-            h == cmd_media_get_poison_list ||
-            h == cmd_media_inject_poison ||
-            h == cmd_media_clear_poison ||
-            h == cmd_sanitize_overwrite) {
-            return CXL_MBOX_MEDIA_DISABLED;
+    /* forbid any selected commands while the media is disabled */
+    if (object_dynamic_cast(OBJECT(cci->d), TYPE_CXL_TYPE3)) {
+        cxl_dstate = &CXL_TYPE3(cci->d)->cxl_dstate;
+
+        if (cxl_dev_media_disabled(cxl_dstate)) {
+            if (h == cmd_events_get_records ||
+                h == cmd_ccls_get_partition_info ||
+                h == cmd_ccls_set_lsa ||
+                h == cmd_ccls_get_lsa ||
+                h == cmd_logs_get_log ||
+                h == cmd_media_get_poison_list ||
+                h == cmd_media_inject_poison ||
+                h == cmd_media_clear_poison ||
+                h == cmd_sanitize_overwrite) {
+                return CXL_MBOX_MEDIA_DISABLED;
+            }
         }
     }