gpu: nvgpu: add PRAMIN support for mem accessors

To support vidmem, implement a way to access buffers via the PRAMIN
window instead of just kernel-mapped sysmem buffers for iGPU as of now.
Depending on the buffer aperture, choose between the two access types in
the buffer memory accessor functions.

vmap()/vunmap() pairs are no-ops for buffers that can't be cpu-mapped.

Two uses of DMA_ATTR_READ_ONLY are removed in the ucode loading path to
support writing to them too via the indirection in addition to cpu.

JIRA DNVGPU-23

Change-Id: I282dba6741c6b8224bc12e69c1fb3936bde7e6ed
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1141314
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c b/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c
index 8bf382fd..08ef7738 100644
--- a/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c
@@ -2443,8 +2443,7 @@ static int gk20a_prepare_ucode(struct gk20a *g)
         pmu->ucode_image = (u32 *)((u8 *)pmu->desc +
                         pmu->desc->descriptor_size);
 
-        err = gk20a_gmmu_alloc_map_attr(vm, DMA_ATTR_READ_ONLY,
-                               GK20A_PMU_UCODE_SIZE_MAX, &pmu->ucode);
+        err = gk20a_gmmu_alloc_map(vm, GK20A_PMU_UCODE_SIZE_MAX, &pmu->ucode);
         if (err)
                 goto err_release_fw;