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coresight: tmc: Configure DMA mask appropriately

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[ Upstream commit a3959c50b0 ]

Before making any DMA API calls, the ETR driver should really be setting
its masks to ensure that DMA is possible. Especially since it can
address more than the 32-bit default mask set by the AMBA bus code.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Robin Murphy
2017-06-05 14:15:09 -06:00
committed by Greg Kroah-Hartman
parent 41830b8672
commit 9606743ca7
1 changed files with 7 additions and 0 deletions
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7
drivers/hwtracing/coresight/coresight-tmc.c
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@@ -362,6 +362,13 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
desc.type = CORESIGHT_DEV_TYPE_SINK;
desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER;
desc.ops = &tmc_etr_cs_ops;
/*
* ETR configuration uses a 40-bit AXI master in place of
* the embedded SRAM of ETB/ETF.
*/
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
if (ret)
goto out;
} else {
desc.type = CORESIGHT_DEV_TYPE_LINKSINK;
desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_FIFO;