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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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6
drivers/gpu/nvgpu/os/linux/nvgpu_mem.c
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@@ -158,8 +158,8 @@ int nvgpu_mem_create_from_mem(struct gk20a *g,
u64 start_page, size_t nr_pages)
{
int ret;
u64 start = start_page * PAGE_SIZE;
u64 size = nr_pages * PAGE_SIZE;
u64 start = start_page * NVGPU_CPU_PAGE_SIZE;
u64 size = nr_pages * NVGPU_CPU_PAGE_SIZE;
dma_addr_t new_iova;
if (src->aperture != APERTURE_SYSMEM)
@@ -178,7 +178,7 @@ int nvgpu_mem_create_from_mem(struct gk20a *g,
/* Re-use the CPU mapping only if the mapping was made by the DMA API */
if (!(src->priv.flags & NVGPU_DMA_NO_KERNEL_MAPPING))
dest->cpu_va = src->cpu_va + (PAGE_SIZE * start_page);
dest->cpu_va = src->cpu_va + (NVGPU_CPU_PAGE_SIZE * start_page);
dest->priv.pages = src->priv.pages + start_page;
dest->priv.flags = src->priv.flags;