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gpu: nvgpu: Simplify nvgpu_dma_free_sys()

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The original free routine has three options:
    if (NVGPU_DMA_NO_KERNEL_MAPPING)
        dma_free_attrs(d, mem->aligned_size, mem->priv.pages,
    else if (other flags)
        dma_free_attrs(d, mem->aligned_size, mem->cpu_va,
    else /* No flags */
        dma_free_coherent(d, mem->aligned_size, mem->cpu_va,

The last dma_free_coherent() can be unwrapped to dma_free_attrs
with its dma_attrs=0, while the former two are identical except
cpu_addr. So this patch merges these three into one single call
but differentiate the cpu_addr and dma_attrs parameters.

Note that the dma_free_attrs returns 0 when flags is not set.

Bug 200444660

Change-Id: I92ec0390138c79c5109973e476ea0ea719d4e2b9
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2029679
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:
Nicolin Chen
2019-02-27 17:04:47 -08:00
committed by mobile promotions
parent 5128237bc8
commit ac3c3e2b69
1 changed files with 8 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/gpu/nvgpu/os/linux/linux-dma.c
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@@ -337,23 +337,16 @@ void nvgpu_dma_free_sys(struct gk20a *g, struct nvgpu_mem *mem)
if (!(mem->mem_flags & NVGPU_MEM_FLAG_SHADOW_COPY) &&
!(mem->mem_flags & __NVGPU_MEM_FLAG_NO_DMA) &&
(mem->cpu_va || mem->priv.pages)) {
if (mem->priv.flags) {
void *cpu_addr = mem->cpu_va;
/* NO_KERNEL_MAPPING uses pages pointer instead of cpu_va */
if (mem->priv.flags & NVGPU_DMA_NO_KERNEL_MAPPING)
cpu_addr = mem->priv.pages;
nvgpu_dma_flags_to_attrs(&dma_attrs, mem->priv.flags);
dma_free_attrs(d, mem->aligned_size, cpu_addr,
sg_dma_address(mem->priv.sgt->sgl), dma_attrs);
if (mem->priv.flags & NVGPU_DMA_NO_KERNEL_MAPPING) {
dma_free_attrs(d, mem->aligned_size, mem->priv.pages,
sg_dma_address(mem->priv.sgt->sgl),
dma_attrs);
} else {
dma_free_attrs(d, mem->aligned_size, mem->cpu_va,
sg_dma_address(mem->priv.sgt->sgl),
dma_attrs);
}
} else {
dma_free_coherent(d, mem->aligned_size, mem->cpu_va,
sg_dma_address(mem->priv.sgt->sgl));
}
mem->cpu_va = NULL;
mem->priv.pages = NULL;
}