habanalabs/gaudi: notify user process on device unavailable

When a device error occurs, user process would like to get some
indication on the error by reading some device HW info. If the
device is unavailable, user process can't perform any HW device
reading.

Signed-off-by: Tal Cohen <talcohen@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 1156ec7..939d263 100644 (file)
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -8063,7 +8063,10 @@ reset_device:
 
        if (hdev->asic_prop.fw_security_enabled && !reset_direct) {
                flags = HL_DRV_RESET_HARD | HL_DRV_RESET_BYPASS_REQ_TO_FW | fw_fatal_err_flag;
-               event_mask |= HL_NOTIFIER_EVENT_DEVICE_RESET;
+
+               /* notify on device unavailable while the reset triggered by fw */
+               event_mask |= (HL_NOTIFIER_EVENT_DEVICE_RESET |
+                                       HL_NOTIFIER_EVENT_DEVICE_UNAVAILABLE);
        } else if (hdev->hard_reset_on_fw_events) {
                flags = HL_DRV_RESET_HARD | HL_DRV_RESET_DELAY | fw_fatal_err_flag;
                event_mask |= HL_NOTIFIER_EVENT_DEVICE_RESET;

diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h
index 18f86d2..78aecea 100644 (file)
--- a/include/uapi/misc/habanalabs.h
+++ b/include/uapi/misc/habanalabs.h
@@ -1432,15 +1432,17 @@ struct hl_debug_args {
 /*
  * Notifier event values - for the notification mechanism and the HL_INFO_GET_EVENTS command
  *
- * HL_NOTIFIER_EVENT_TPC_ASSERT       - Indicates TPC assert event
- * HL_NOTIFIER_EVENT_UNDEFINED_OPCODE - Indicates undefined operation code
- * HL_NOTIFIER_EVENT_DEVICE_RESET     - Indicates device requires a reset
- * HL_NOTIFIER_EVENT_CS_TIMEOUT       - Indicates CS timeout error
+ * HL_NOTIFIER_EVENT_TPC_ASSERT                - Indicates TPC assert event
+ * HL_NOTIFIER_EVENT_UNDEFINED_OPCODE  - Indicates undefined operation code
+ * HL_NOTIFIER_EVENT_DEVICE_RESET      - Indicates device requires a reset
+ * HL_NOTIFIER_EVENT_CS_TIMEOUT                - Indicates CS timeout error
+ * HL_NOTIFIER_EVENT_DEVICE_UNAVAILABLE        - Indicates device is unavailable
  */
 #define HL_NOTIFIER_EVENT_TPC_ASSERT           (1ULL << 0)
 #define HL_NOTIFIER_EVENT_UNDEFINED_OPCODE     (1ULL << 1)
 #define HL_NOTIFIER_EVENT_DEVICE_RESET         (1ULL << 2)
-#define HL_NOTIFIER_EVENT_CS_TIMEOUT            (1ULL << 3)
+#define HL_NOTIFIER_EVENT_CS_TIMEOUT           (1ULL << 3)
+#define HL_NOTIFIER_EVENT_DEVICE_UNAVAILABLE   (1ULL << 4)
 
 /*
  * Various information operations such as: