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gpu: nvgpu: sim: make ring buffer independent of PAGE_SIZE

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The simulator ring buffer DMA interface supports buffers of the following sizes:
4, 8, 12 and 16K. At present, it is configured to 4K and it  happens to match
with the kernel PAGE_SIZE, which is used to wrap back the GET/PUT pointers once
4K is reached. However, this is not always true; for instance, take 64K pages.
Hence, replace PAGE_SIZE with SIM_BFR_SIZE.

Introduce macro NVGPU_CPU_PAGE_SIZE which aliases to PAGE_SIZE and replace
latter with former.

Bug 200658101
Jira NVGPU-6018

Change-Id: I83cc62b87291734015c51f3e5a98173549e065de
Signed-off-by: Antony Clince Alex <aalex@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2420728
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Antony Clince Alex
2020-09-28 16:44:40 +05:30
committed by Alex Waterman
parent 09857ecd91
commit c36752fe3d
37 changed files with 120 additions and 103 deletions
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4
drivers/gpu/nvgpu/os/linux/fecs_trace_linux.c
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@@ -200,7 +200,7 @@ int nvgpu_gr_fecs_trace_ring_alloc(struct gk20a *g,
{
struct nvgpu_ctxsw_ring_header *hdr;
*size = round_up(*size, PAGE_SIZE);
*size = round_up(*size, NVGPU_CPU_PAGE_SIZE);
hdr = vmalloc_user(*size);
if (!hdr)
return -ENOMEM;
@@ -531,7 +531,7 @@ int gk20a_ctxsw_dev_mmap(struct file *filp, struct vm_area_struct *vma)
unsigned long vsize = vma->vm_end - vma->vm_start;
size = min(mmapsize, vsize);
size = round_up(size, PAGE_SIZE);
size = round_up(size, NVGPU_CPU_PAGE_SIZE);
ret = remap_pfn_range(vma, vma->vm_start,
(unsigned long) mmapaddr,