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Diffstat (limited to 'drivers/gpu/nvgpu/common')
-rw-r--r--drivers/gpu/nvgpu/common/linux/nvgpu_mem.c19
1 files changed, 6 insertions, 13 deletions
diff --git a/drivers/gpu/nvgpu/common/linux/nvgpu_mem.c b/drivers/gpu/nvgpu/common/linux/nvgpu_mem.c
index 2bf26602..1dbbd1a0 100644
--- a/drivers/gpu/nvgpu/common/linux/nvgpu_mem.c
+++ b/drivers/gpu/nvgpu/common/linux/nvgpu_mem.c
@@ -60,14 +60,6 @@ int nvgpu_mem_begin(struct gk20a *g, struct nvgpu_mem *mem)
60{ 60{
61 void *cpu_va; 61 void *cpu_va;
62 62
63 if (WARN_ON(mem->cpu_accessible)) {
64 nvgpu_warn(g, "nested");
65 return -EBUSY;
66 }
67
68 /* flag that the intent is to allow CPU access to the memory. */
69 mem->cpu_accessible = true;
70
71 if (mem->aperture != APERTURE_SYSMEM || g->mm.force_pramin) 63 if (mem->aperture != APERTURE_SYSMEM || g->mm.force_pramin)
72 return 0; 64 return 0;
73 65
@@ -79,14 +71,17 @@ int nvgpu_mem_begin(struct gk20a *g, struct nvgpu_mem *mem)
79 if (!(mem->priv.flags & NVGPU_DMA_NO_KERNEL_MAPPING)) 71 if (!(mem->priv.flags & NVGPU_DMA_NO_KERNEL_MAPPING))
80 return 0; 72 return 0;
81 73
74 if (WARN_ON(mem->cpu_va)) {
75 nvgpu_warn(g, "nested");
76 return -EBUSY;
77 }
78
82 cpu_va = vmap(mem->priv.pages, 79 cpu_va = vmap(mem->priv.pages,
83 PAGE_ALIGN(mem->size) >> PAGE_SHIFT, 80 PAGE_ALIGN(mem->size) >> PAGE_SHIFT,
84 0, pgprot_writecombine(PAGE_KERNEL)); 81 0, pgprot_writecombine(PAGE_KERNEL));
85 82
86 if (WARN_ON(!cpu_va)) { 83 if (WARN_ON(!cpu_va))
87 mem->cpu_accessible = false;
88 return -ENOMEM; 84 return -ENOMEM;
89 }
90 85
91 mem->cpu_va = cpu_va; 86 mem->cpu_va = cpu_va;
92 return 0; 87 return 0;
@@ -94,8 +89,6 @@ int nvgpu_mem_begin(struct gk20a *g, struct nvgpu_mem *mem)
94 89
95void nvgpu_mem_end(struct gk20a *g, struct nvgpu_mem *mem) 90void nvgpu_mem_end(struct gk20a *g, struct nvgpu_mem *mem)
96{ 91{
97 mem->cpu_accessible = false;
98
99 if (mem->aperture != APERTURE_SYSMEM || g->mm.force_pramin) 92 if (mem->aperture != APERTURE_SYSMEM || g->mm.force_pramin)
100 return; 93 return;
101 94