mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-24 02:22:34 +03:00
b44c7fdb11
This migrates the common DMA code (os agnostic) to the common directory. This new unit will be the common DMA allocator that lets users allocate SYSMEM, VIDMEM, or either. Other units will be responsible for actually handling the mechanics of allocating VIDMEM or SYSMEM. Also update the names of the DMA related files so that tmake doesn't complain about duplicate C file names. To do this call the common DMA file dma.c and prepend the OS to the other DMA files. So now we have: common/mm/dma.c os/posix/posix-dma.c os/linux/linux-dma.c JIRA NVGPU-990 Change-Id: I22d2d41803ad89be7d9c28f87864ce4fedf10836 Signed-off-by: Alex Waterman <alexw@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1799807 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <nvgpu/mm.h>
|
|
#include <nvgpu/vm.h>
|
|
#include <nvgpu/bug.h>
|
|
#include <nvgpu/dma.h>
|
|
#include <nvgpu/gmmu.h>
|
|
#include <nvgpu/nvgpu_mem.h>
|
|
#include <nvgpu/enabled.h>
|
|
|
|
/*
|
|
* In userspace vidmem vs sysmem is just a difference in what is placed in the
|
|
* aperture field.
|
|
*/
|
|
static int __nvgpu_do_dma_alloc(struct gk20a *g, unsigned long flags,
|
|
size_t size, struct nvgpu_mem *mem,
|
|
enum nvgpu_aperture ap)
|
|
{
|
|
void *memory = malloc(mem->aligned_size);
|
|
|
|
if (memory == NULL)
|
|
return -ENOMEM;
|
|
|
|
mem->cpu_va = memory;
|
|
mem->aperture = ap;
|
|
mem->size = size;
|
|
mem->aligned_size = PAGE_ALIGN(size);
|
|
mem->gpu_va = 0ULL;
|
|
mem->skip_wmb = true;
|
|
mem->vidmem_alloc = NULL;
|
|
mem->allocator = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool nvgpu_iommuable(struct gk20a *g)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
int nvgpu_dma_alloc_flags_sys(struct gk20a *g, unsigned long flags,
|
|
size_t size, struct nvgpu_mem *mem)
|
|
{
|
|
return __nvgpu_do_dma_alloc(g, flags, size, mem, APERTURE_SYSMEM);
|
|
}
|
|
|
|
int nvgpu_dma_alloc_flags_vid_at(struct gk20a *g, unsigned long flags,
|
|
size_t size, struct nvgpu_mem *mem, u64 at)
|
|
{
|
|
BUG();
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nvgpu_dma_free_sys(struct gk20a *g, struct nvgpu_mem *mem)
|
|
{
|
|
if (!(mem->mem_flags & NVGPU_MEM_FLAG_SHADOW_COPY))
|
|
free(mem->cpu_va);
|
|
|
|
memset(mem, 0, sizeof(*mem));
|
|
}
|
|
|
|
void nvgpu_dma_free_vid(struct gk20a *g, struct nvgpu_mem *mem)
|
|
{
|
|
BUG();
|
|
}
|