gpu: nvgpu: abstract away dma alloc attrs

Don't use enum dma_attr in the gk20a_gmmu_alloc_attr* functions, but
define nvgpu-internal flags for no kernel mapping, force contiguous, and
read only modes. Store the flags in the allocated struct mem_desc and
only use gk20a_gmmu_free, remove gk20a_gmmu_free_attr. This helps in OS
abstraction. Rename the notion of attr to flags.

Add implicit NVGPU_DMA_NO_KERNEL_MAPPING to all vidmem buffers
allocated via gk20a_gmmu_alloc_vid for consistency.

Fix a bug in gk20a_gmmu_alloc_map_attr that dropped the attr
parameter accidentally.

Bug 1853519

Change-Id: I1ff67dff9fc425457ae445ce4976a780eb4dcc9f
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1321101
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/ltc_common.c b/drivers/gpu/nvgpu/gk20a/ltc_common.c
index 13819872..7c4db84e 100644
--- a/drivers/gpu/nvgpu/gk20a/ltc_common.c
+++ b/drivers/gpu/nvgpu/gk20a/ltc_common.c
@@ -68,7 +68,7 @@ static int gk20a_ltc_alloc_phys_cbc(struct gk20a *g,
 {
         struct gr_gk20a *gr = &g->gr;
 
-        return gk20a_gmmu_alloc_attr_sys(g, DMA_ATTR_FORCE_CONTIGUOUS,
+        return gk20a_gmmu_alloc_flags_sys(g, NVGPU_DMA_FORCE_CONTIGUOUS,
                                     compbit_backing_size,
                                     &gr->compbit_store.mem);
 }
@@ -78,7 +78,7 @@ static int gk20a_ltc_alloc_virt_cbc(struct gk20a *g,
 {
         struct gr_gk20a *gr = &g->gr;
 
-        return gk20a_gmmu_alloc_attr_sys(g, DMA_ATTR_NO_KERNEL_MAPPING,
+        return gk20a_gmmu_alloc_flags_sys(g, NVGPU_DMA_NO_KERNEL_MAPPING,
                                     compbit_backing_size,
                                     &gr->compbit_store.mem);
 }