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| author | Omer Shpigelman <oshpigelman@habana.ai> | 2020-06-03 13:03:35 +0300 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2020-06-24 09:09:10 +0300 |
| commit | cfd4176dc0bbbd3d01d6764cd85e1f1705b35548 (patch) | |
| tree | 36ed999d4660e9f15b3d21c28630a4bc59bb66b5 /drivers/misc/habanalabs/gaudi/gaudi.c | |
| parent | 64536abc62c17ef6c7b0f17b820de9923b80e745 (diff) | |
| download | lwn-cfd4176dc0bbbd3d01d6764cd85e1f1705b35548.tar.gz lwn-cfd4176dc0bbbd3d01d6764cd85e1f1705b35548.zip | |
habanalabs: use PI in MMU cache invalidation
The PS flow for MMU cache invalidation caused timeouts in stress tests.
Use PS + PI flow so no timeouts should happen whatsoever.
Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/misc/habanalabs/gaudi/gaudi.c')
| -rw-r--r-- | drivers/misc/habanalabs/gaudi/gaudi.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c index f34ac8d35a14..211547d4f8a7 100644 --- a/drivers/misc/habanalabs/gaudi/gaudi.c +++ b/drivers/misc/habanalabs/gaudi/gaudi.c @@ -2725,6 +2725,12 @@ static int gaudi_mmu_init(struct hl_device *hdev) WREG32(mmSTLB_HOP_CONFIGURATION, hdev->mmu_huge_page_opt ? 0x30440 : 0x40440); + /* + * The H/W expects the first PI after init to be 1. After wraparound + * we'll write 0. + */ + gaudi->mmu_cache_inv_pi = 1; + gaudi->hw_cap_initialized |= HW_CAP_MMU; return 0; @@ -6017,6 +6023,8 @@ static int gaudi_mmu_invalidate_cache(struct hl_device *hdev, bool is_hard, mutex_lock(&hdev->mmu_cache_lock); /* L0 & L1 invalidation */ + WREG32(mmSTLB_INV_PS, 3); + WREG32(mmSTLB_CACHE_INV, gaudi->mmu_cache_inv_pi++); WREG32(mmSTLB_INV_PS, 2); rc = hl_poll_timeout( |