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gpu: nvgpu: posix: improve SGT handling in posix-dma

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This patch fixes posix-dma to properly set operations during creation
and during free it ensures that it is not freeing a NULL pointer.

JIRA NVGPU-2225

Change-Id: I0838d2faa9a05ab98d3ebd0d6af676ad1088c73d
Signed-off-by: Nicolas Benech <nbenech@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2145434
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Nicolas Benech
2019-06-28 15:36:00 -04:00
committed by mobile promotions
parent cfd1aa3a76
commit 2f324d5fb2
1 changed files with 19 additions and 2 deletions
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17
drivers/gpu/nvgpu/os/posix/posix-dma.c
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@@ -115,6 +115,18 @@ static size_t mock_fb_get_vidmem_size(struct gk20a *g)
return SZ_4G;
}
static const struct nvgpu_sgt_ops nvgpu_sgt_posix_ops = {
.sgl_next = nvgpu_mem_sgl_next,
.sgl_phys = nvgpu_mem_sgl_phys,
.sgl_ipa = nvgpu_mem_sgl_phys,
.sgl_ipa_to_pa = nvgpu_mem_sgl_ipa_to_pa,
.sgl_dma = nvgpu_mem_sgl_dma,
.sgl_length = nvgpu_mem_sgl_length,
.sgl_gpu_addr = nvgpu_mem_sgl_gpu_addr,
.sgt_iommuable = nvgpu_mem_sgt_iommuable,
.sgt_free = nvgpu_mem_sgt_free,
};
/* In userspace, vidmem requires only a few fields populated */
int nvgpu_dma_alloc_flags_vid_at(struct gk20a *g, unsigned long flags,
size_t size, struct nvgpu_mem *mem, u64 at)
@@ -183,6 +195,8 @@ int nvgpu_dma_alloc_flags_vid_at(struct gk20a *g, unsigned long flags,
goto fail_sgtfree;
}
mem->priv.sgt->ops = &nvgpu_sgt_posix_ops;
/* Allocate memory for sgl */
mem->priv.sgt->sgl = (struct nvgpu_sgl *)
nvgpu_kzalloc(g, sizeof(struct nvgpu_mem_sgl));
@@ -219,9 +233,12 @@ void nvgpu_dma_free_vid(struct gk20a *g, struct nvgpu_mem *mem)
nvgpu_memset(g, mem, 0, 0, mem->aligned_size);
if (mem->priv.sgt != NULL) {
nvgpu_free(mem->allocator, (u64)nvgpu_vidmem_get_page_alloc(
(struct nvgpu_mem_sgl *)mem->priv.sgt->sgl));
nvgpu_kfree(g, mem->priv.sgt);
mem->priv.sgt = NULL;
}
mem->size = 0;
mem->aligned_size = 0;