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habanalabs/gaudi: don't enable clock gating on DMA5

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Graph Compiler uses DMA5 in a non-standard way and it requires the
driver to disable clock gating on that DMA.

Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Oded Gabbay 2021-02-06 19:34:59 +02:00
parent 6df50d2743
commit da5dfbb97a
1 changed files with 6 additions and 0 deletions
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6
drivers/misc/habanalabs/gaudi/gaudi.c
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@ -3460,6 +3460,12 @@ static void gaudi_set_clock_gating(struct hl_device *hdev)
enable = !!(hdev->clock_gating_mask &
(BIT_ULL(gaudi_dma_assignment[i])));
/* GC sends work to DMA engine through Upper CP in DMA5 so
* we need to not enable clock gating in that DMA
*/
if (i == GAUDI_HBM_DMA_4)
enable = 0;
qman_offset = gaudi_dma_assignment[i] * DMA_QMAN_OFFSET;
WREG32(mmDMA0_QM_CGM_CFG1 + qman_offset,
enable ? QMAN_CGM1_PWR_GATE_EN : 0);