[PATCH 2/3] accel/habanalabs: add event queue extra validation

[Oded Gabbay]

From: Ofir Bitton <obitton at habana.ai>

In order to increase reliability of the event queue interface,
we apply to Gaudi2 the same mechanism we have in Gaudi1.
The extra validation is basically checking that the received
event index matches the expected index.

Signed-off-by: Ofir Bitton <obitton at habana.ai>
Reviewed-by: Oded Gabbay <ogabbay at kernel.org>
Signed-off-by: Oded Gabbay <ogabbay at kernel.org>
---
 drivers/accel/habanalabs/common/irq.c    | 2 +-
 drivers/accel/habanalabs/gaudi2/gaudi2.c | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/accel/habanalabs/common/irq.c b/drivers/accel/habanalabs/common/irq.c
index c67895b1cdeb..b1010d206c2e 100644
--- a/drivers/accel/habanalabs/common/irq.c
+++ b/drivers/accel/habanalabs/common/irq.c
@@ -430,7 +430,7 @@ irqreturn_t hl_irq_handler_eq(int irq, void *arg)
 		cur_eqe_index = FIELD_GET(EQ_CTL_INDEX_MASK, cur_eqe);
 		if ((hdev->event_queue.check_eqe_index) &&
 				(((eq->prev_eqe_index + 1) & EQ_CTL_INDEX_MASK) != cur_eqe_index)) {
-			dev_dbg(hdev->dev,
+			dev_err(hdev->dev,
 				"EQE %#x in queue is ready but index does not match %d!=%d",
 				cur_eqe,
 				((eq->prev_eqe_index + 1) & EQ_CTL_INDEX_MASK),
diff --git a/drivers/accel/habanalabs/gaudi2/gaudi2.c b/drivers/accel/habanalabs/gaudi2/gaudi2.c
index 0d41adf4792c..20c4583f12b0 100644
--- a/drivers/accel/habanalabs/gaudi2/gaudi2.c
+++ b/drivers/accel/habanalabs/gaudi2/gaudi2.c
@@ -3619,6 +3619,12 @@ static int gaudi2_sw_init(struct hl_device *hdev)
 
 	prop->supports_compute_reset = true;
 
+	/* Event queue sanity check added in FW version 1.11 */
+	if (hl_is_fw_sw_ver_below(hdev, 1, 11))
+		hdev->event_queue.check_eqe_index = false;
+	else
+		hdev->event_queue.check_eqe_index = true;
+
 	hdev->asic_funcs->set_pci_memory_regions(hdev);
 
 	rc = gaudi2_special_blocks_iterator_config(hdev);
-- 
2.40.1