From 7c810f4d0c600d0c47d20016c4355dd5989ccd40 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Mon, 28 Oct 2019 13:37:12 +0100 Subject: [PATCH] gpu: host1x: Allocate gather copy for host1x [ Upstream commit b78e70c04c149299bd210759d7c7af7c86b89ca8 ] Currently when the gather buffers are copied, they are copied to a buffer that is allocated for the host1x client that wants to execute the command streams in the buffers. However, the gather buffers will be read by the host1x device, which causes SMMU faults if the DMA API is backed by an IOMMU. Fix this by allocating the gather buffer copy for the host1x device, which makes sure that it will be mapped into the host1x's IOVA space if the DMA API is backed by an IOMMU. Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin --- drivers/gpu/host1x/job.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c index eaa5c3352c13..22559670faee 100644 --- a/drivers/gpu/host1x/job.c +++ b/drivers/gpu/host1x/job.c @@ -436,7 +436,8 @@ out: return err; } -static inline int copy_gathers(struct host1x_job *job, struct device *dev) +static inline int copy_gathers(struct device *host, struct host1x_job *job, + struct device *dev) { struct host1x_firewall fw; size_t size = 0; @@ -459,12 +460,12 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev) * Try a non-blocking allocation from a higher priority pools first, * as awaiting for the allocation here is a major performance hit. */ - job->gather_copy_mapped = dma_alloc_wc(dev, size, &job->gather_copy, + job->gather_copy_mapped = dma_alloc_wc(host, size, &job->gather_copy, GFP_NOWAIT); /* the higher priority allocation failed, try the generic-blocking */ if (!job->gather_copy_mapped) - job->gather_copy_mapped = dma_alloc_wc(dev, size, + job->gather_copy_mapped = dma_alloc_wc(host, size, &job->gather_copy, GFP_KERNEL); if (!job->gather_copy_mapped) @@ -512,7 +513,7 @@ int host1x_job_pin(struct host1x_job *job, struct device *dev) goto out; if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL)) { - err = copy_gathers(job, dev); + err = copy_gathers(host->dev, job, dev); if (err) goto out; } @@ -573,7 +574,7 @@ void host1x_job_unpin(struct host1x_job *job) job->num_unpins = 0; if (job->gather_copy_size) - dma_free_wc(job->channel->dev, job->gather_copy_size, + dma_free_wc(host->dev, job->gather_copy_size, job->gather_copy_mapped, job->gather_copy); } EXPORT_SYMBOL(host1x_job_unpin);