gpu: host1x: Skip IOMMU initialization if firewall is enabled
PATCH 1/1 gpu: host1x: Skip IOMMU initialization if firewall is enabled
Host1x's CDMA can't access the command buffers if IOMMU and Host1x firewall are enabled in the kernels config because firewall doesn't map the copied buffer into IOVA space. Fix this by skipping IOMMU initialization if firewall is enabled as firewall merges sparse cmdbufs into a single contiguous buffer and hence IOMMU isn't needed in this case.
--- drivers/gpu/host1x/dev.c | 3 +++ 1 file changed, 3 insertions(+)
drivers/gpu/host1x/dev.c +3 -0
@@ -218,6 +218,9 @@ static int host1x_probe(struct platform_device *pdev)return err; } +if (IS_ENABLED (CONFIG_TEGRA_HOST1X_FIREWALL )) + goto skip_iommu; + host->group =iommu_group_get (&pdev->dev);if (host->group) {struct iommu_domain_geometry *geometry;
Signature · 1 line
2.17.0
Quoted 7 lines · On Saturday, 19 May 2018 04:07:10 MSK Dmitry Osipenko wrote:
Host1x's CDMA can't access the command buffers if IOMMU and Host1x firewall are enabled in the kernels config because firewall doesn't map the copied buffer into IOVA space. Fix this by skipping IOMMU initialization if firewall is enabled as firewall merges sparse cmdbufs into a single contiguous buffer and hence IOMMU isn't needed in this case.
Signed-off-by Dmitry Osipenko <[email protected]>
Thierry, please consider applying this patch.
Thierry Reding
AppliedQuoted 10 lines · Dmitry Osipenko
Host1x's CDMA can't access the command buffers if IOMMU and Host1x firewall are enabled in the kernels config because firewall doesn't map the copied buffer into IOVA space. Fix this by skipping IOMMU initialization if firewall is enabled as firewall merges sparse cmdbufs into a single contiguous buffer and hence IOMMU isn't needed in this case.
Signed-off-by Dmitry Osipenko <[email protected]>--- drivers/gpu/host1x/dev.c | 3 +++ 1 file changed, 3 insertions(+)
Applied to drm/tegra/fixes, thanks.
Thierry
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