habanalabs/gaudi2: support abrupt device reset event

In certain scenarios, firmware might encounter a fatal event for
which a device reset is required. Hence, a proper notification
is needed for driver to be aware and initiate a reset sequence.

In secured environments the reset will be performed by firmware
without an explicit request from the driver.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

diff --git a/drivers/misc/habanalabs/gaudi2/gaudi2.c b/drivers/misc/habanalabs/gaudi2/gaudi2.c
index a187e1e..85041f3 100644 (file)
--- a/drivers/misc/habanalabs/gaudi2/gaudi2.c
+++ b/drivers/misc/habanalabs/gaudi2/gaudi2.c
@@ -9226,6 +9226,7 @@ static void gaudi2_handle_eqe(struct hl_device *hdev, struct hl_eq_entry *eq_ent
                break;
 
        case GAUDI2_EVENT_CPU_FP32_NOT_SUPPORTED:
+       case GAUDI2_EVENT_DEV_RESET_REQ:
                event_mask |= HL_NOTIFIER_EVENT_GENERAL_HW_ERR;
                error_count = GAUDI2_NA_EVENT_CAUSE;
                is_critical = true;

diff --git a/drivers/misc/habanalabs/include/gaudi2/gaudi2_async_events.h b/drivers/misc/habanalabs/include/gaudi2/gaudi2_async_events.h
index 305b576..50852cc 100644 (file)
--- a/drivers/misc/habanalabs/include/gaudi2/gaudi2_async_events.h
+++ b/drivers/misc/habanalabs/include/gaudi2/gaudi2_async_events.h
@@ -958,6 +958,7 @@ enum gaudi2_async_event_id {
        GAUDI2_EVENT_CPU11_STATUS_NIC11_ENG1 = 1318,
        GAUDI2_EVENT_ARC_DCCM_FULL = 1319,
        GAUDI2_EVENT_CPU_FP32_NOT_SUPPORTED = 1320,
+       GAUDI2_EVENT_DEV_RESET_REQ = 1321,
        GAUDI2_EVENT_SIZE,
 };
 

diff --git a/drivers/misc/habanalabs/include/gaudi2/gaudi2_async_ids_map_extended.h b/drivers/misc/habanalabs/include/gaudi2/gaudi2_async_ids_map_extended.h
index d510cb1..82be01b 100644 (file)
--- a/drivers/misc/habanalabs/include/gaudi2/gaudi2_async_ids_map_extended.h
+++ b/drivers/misc/habanalabs/include/gaudi2/gaudi2_async_ids_map_extended.h
@@ -2665,6 +2665,8 @@ static struct gaudi2_async_events_ids_map gaudi2_irq_map_table[] = {
                .msg = 1, .reset = 0, .name = "ARC_DCCM_FULL" },
        { .fc_id = 1320, .cpu_id = 626, .valid = 1,
                .msg = 1, .reset = 1, .name = "FP32_NOT_SUPPORTED" },
+       { .fc_id = 1321, .cpu_id = 627, .valid = 1,
+               .msg = 1, .reset = 1, .name = "DEV_RESET_REQ" },
 };
 
 #endif /* __GAUDI2_ASYNC_IDS_MAP_EVENTS_EXT_H_ */