habanalabs: improve MMU cache invalidation code (42d0b0b9) · Commits · 戴 / test

A new sequence is introduced to invalidate the MMU cache in order to avoid timeouts. Signed-off-by:

drivers/misc/habanalabs/gaudi/gaudi.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -5982,16 +5982,18 @@ static void gaudi_mmu_invalidate_cache(struct hl_device *hdev, bool is_hard,
		timeout_usec = MMU_CONFIG_TIMEOUT_USEC;

		/* L0 & L1 invalidation */
		WREG32(mmSTLB_INV_ALL_START, 1);
		WREG32(mmSTLB_INV_PS, 2);

		rc = hl_poll_timeout(
		hdev,
		mmSTLB_INV_ALL_START,
		mmSTLB_INV_PS,
		status,
		!status,
		1000,
		timeout_usec);

		WREG32(mmSTLB_INV_SET, 0);

		if (rc)
		dev_notice_ratelimited(hdev->dev,
		"Timeout when waiting for MMU cache invalidation\n");