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/tegra/linux/platform_gk20a_tegra.c b/drivers/gpu/nvgpu/tegra/linux/platform_gk20a_tegra.c
index 1b40702a..d612fcd2 100644
--- a/drivers/gpu/nvgpu/tegra/linux/platform_gk20a_tegra.c
+++ b/drivers/gpu/nvgpu/tegra/linux/platform_gk20a_tegra.c
@@ -95,9 +95,10 @@ static inline void __maybe_unused pmc_write(u32 val, unsigned long reg)
 static void gk20a_tegra_secure_page_destroy(struct device *dev,
                                        struct secure_page_buffer *secure_buffer)
 {
+        DEFINE_DMA_ATTRS(attrs);
         dma_free_attrs(&tegra_vpr_dev, secure_buffer->size,
                         (void *)(uintptr_t)secure_buffer->iova,
-                        secure_buffer->iova, &secure_buffer->attrs);
+                        secure_buffer->iova, &attrs);
 }
 
 int gk20a_tegra_secure_page_alloc(struct device *dev)
@@ -118,7 +119,6 @@ int gk20a_tegra_secure_page_alloc(struct device *dev)
 
         secure_buffer->size = size;
         secure_buffer->iova = iova;
-        secure_buffer->attrs = attrs;
         secure_buffer->destroy = gk20a_tegra_secure_page_destroy;
 
         return 0;