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| author | Oded Gabbay <oded.gabbay@gmail.com> | 2020-09-14 08:26:54 +0200 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2020-09-22 17:49:54 +0200 |
| commit | d1f3633599a9178572f3b25f9f23cd9dc423a9fa (patch) | |
| tree | e6220afb9f0a8a61f1946eb0dbf619f38f6b23e2 /drivers/misc | |
| parent | habanalabs/gaudi: remove axi drain support (diff) | |
| download | linux-d1f3633599a9178572f3b25f9f23cd9dc423a9fa.tar.xz linux-d1f3633599a9178572f3b25f9f23cd9dc423a9fa.zip | |
habanalabs/gaudi: fix DMA completions max outstanding to 15
This is a workaround for H/W bug H3-2116, where if there are more than 16
outstanding completions in the DMA transpose engine, there can be a
deadlock in the engine.
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/habanalabs/gaudi/gaudi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c index 2c10e3f92c86..86650be5898f 100644 --- a/drivers/misc/habanalabs/gaudi/gaudi.c +++ b/drivers/misc/habanalabs/gaudi/gaudi.c @@ -1918,6 +1918,9 @@ static void gaudi_init_dma_core(struct hl_device *hdev, int dma_id) WREG32(mmDMA0_CORE_RD_MAX_OUTSTAND + dma_offset, 0); WREG32(mmDMA0_CORE_RD_MAX_SIZE + dma_offset, 0); + /* WA for H/W bug H3-2116 */ + WREG32(mmDMA0_CORE_LBW_MAX_OUTSTAND + dma_offset, 15); + /* STOP_ON bit implies no completion to operation in case of RAZWI */ if (hdev->stop_on_err) dma_err_cfg |= 1 << DMA0_CORE_ERR_CFG_STOP_ON_ERR_SHIFT; |