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authorAlex Waterman <alexw@nvidia.com>2018-08-14 14:30:48 -0400
committermobile promotions <svcmobile_promotions@nvidia.com>2018-09-05 23:38:42 -0400
commitb44c7fdb114a63ab98fffc0f246776b56399ff64 (patch)
treec523c2ea516aaed3b68271a77cf88ffa132e329d /drivers/gpu/nvgpu/os/posix/dma.c
parentef851272e5201f343c9b287a9eacfc25d4912276 (diff)
gpu: nvgpu: Move common DMA code to common/mm
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>
Diffstat (limited to 'drivers/gpu/nvgpu/os/posix/dma.c')
-rw-r--r--drivers/gpu/nvgpu/os/posix/dma.c228
1 files changed, 0 insertions, 228 deletions
diff --git a/drivers/gpu/nvgpu/os/posix/dma.c b/drivers/gpu/nvgpu/os/posix/dma.c
deleted file mode 100644
index 95bb1a75..00000000
--- a/drivers/gpu/nvgpu/os/posix/dma.c
+++ /dev/null
@@ -1,228 +0,0 @@
1/*
2 * Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
21 */
22
23#include <stdlib.h>
24
25#include <nvgpu/mm.h>
26#include <nvgpu/vm.h>
27#include <nvgpu/bug.h>
28#include <nvgpu/dma.h>
29#include <nvgpu/gmmu.h>
30#include <nvgpu/nvgpu_mem.h>
31#include <nvgpu/enabled.h>
32
33/*
34 * In userspace vidmem vs sysmem is just a difference in what is placed in the
35 * aperture field.
36 */
37static int __nvgpu_do_dma_alloc(struct gk20a *g, unsigned long flags,
38 size_t size, struct nvgpu_mem *mem,
39 enum nvgpu_aperture ap)
40{
41 void *memory = malloc(mem->aligned_size);
42
43 if (memory == NULL)
44 return -ENOMEM;
45
46 mem->cpu_va = memory;
47 mem->aperture = ap;
48 mem->size = size;
49 mem->aligned_size = PAGE_ALIGN(size);
50 mem->gpu_va = 0ULL;
51 mem->skip_wmb = true;
52 mem->vidmem_alloc = NULL;
53 mem->allocator = NULL;
54
55 return 0;
56}
57
58bool nvgpu_iommuable(struct gk20a *g)
59{
60 return false;
61}
62
63int nvgpu_dma_alloc(struct gk20a *g, size_t size, struct nvgpu_mem *mem)
64{
65 return nvgpu_dma_alloc_flags(g, 0, size, mem);
66}
67
68int nvgpu_dma_alloc_flags(struct gk20a *g, unsigned long flags, size_t size,
69 struct nvgpu_mem *mem)
70{
71 if (!nvgpu_is_enabled(g, NVGPU_MM_UNIFIED_MEMORY)) {
72 /*
73 * First try vidmem. Obviously in userspace there's no such
74 * thing as vidmem per se but we will mark the aperture as
75 * vidmem.
76 */
77 int err = nvgpu_dma_alloc_flags_vid(g, 0, size, mem);
78
79 if (!err)
80 return 0;
81 /*
82 * Fall back to sysmem (which may then also fail) in case
83 * vidmem is exhausted.
84 */
85 }
86
87 return nvgpu_dma_alloc_flags_sys(g, flags, size, mem);
88
89}
90
91int nvgpu_dma_alloc_sys(struct gk20a *g, size_t size, struct nvgpu_mem *mem)
92{
93 return nvgpu_dma_alloc_flags_sys(g, 0, size, mem);
94}
95
96int nvgpu_dma_alloc_flags_sys(struct gk20a *g, unsigned long flags,
97 size_t size, struct nvgpu_mem *mem)
98{
99 return __nvgpu_do_dma_alloc(g, flags, size, mem, APERTURE_SYSMEM);
100}
101
102int nvgpu_dma_alloc_vid(struct gk20a *g, size_t size, struct nvgpu_mem *mem)
103{
104 return nvgpu_dma_alloc_flags_vid(g, 0, size, mem);
105}
106
107int nvgpu_dma_alloc_flags_vid(struct gk20a *g, unsigned long flags,
108 size_t size, struct nvgpu_mem *mem)
109{
110 return __nvgpu_do_dma_alloc(g, flags, size, mem, APERTURE_VIDMEM);
111}
112
113int nvgpu_dma_alloc_vid_at(struct gk20a *g,
114 size_t size, struct nvgpu_mem *mem, u64 at)
115{
116 BUG();
117
118 return 0;
119}
120
121int nvgpu_dma_alloc_flags_vid_at(struct gk20a *g, unsigned long flags,
122 size_t size, struct nvgpu_mem *mem, u64 at)
123{
124 BUG();
125
126 return 0;
127}
128
129void nvgpu_dma_free(struct gk20a *g, struct nvgpu_mem *mem)
130{
131 if (!(mem->mem_flags & NVGPU_MEM_FLAG_SHADOW_COPY))
132 free(mem->cpu_va);
133
134 memset(mem, 0, sizeof(*mem));
135}
136
137int nvgpu_dma_alloc_map(struct vm_gk20a *vm, size_t size,
138 struct nvgpu_mem *mem)
139{
140 return nvgpu_dma_alloc_map_flags(vm, 0, size, mem);
141}
142
143int nvgpu_dma_alloc_map_flags(struct vm_gk20a *vm, unsigned long flags,
144 size_t size, struct nvgpu_mem *mem)
145{
146 if (!nvgpu_is_enabled(gk20a_from_vm(vm), NVGPU_MM_UNIFIED_MEMORY)) {
147 int err = nvgpu_dma_alloc_map_flags_vid(vm,
148 flags | NVGPU_DMA_NO_KERNEL_MAPPING,
149 size, mem);
150
151 if (!err)
152 return 0;
153 /*
154 * Fall back to sysmem (which may then also fail) in case
155 * vidmem is exhausted.
156 */
157 }
158
159 return nvgpu_dma_alloc_map_flags_sys(vm, flags, size, mem);
160}
161
162int nvgpu_dma_alloc_map_sys(struct vm_gk20a *vm, size_t size,
163 struct nvgpu_mem *mem)
164{
165 return nvgpu_dma_alloc_map_flags_sys(vm, 0, size, mem);
166}
167
168int nvgpu_dma_alloc_map_flags_sys(struct vm_gk20a *vm, unsigned long flags,
169 size_t size, struct nvgpu_mem *mem)
170{
171 int err = nvgpu_dma_alloc_flags_sys(vm->mm->g, flags, size, mem);
172
173 if (err)
174 return err;
175
176 mem->gpu_va = nvgpu_gmmu_map(vm, mem, size, 0,
177 gk20a_mem_flag_none, false,
178 mem->aperture);
179 if (!mem->gpu_va) {
180 err = -ENOMEM;
181 goto fail_free;
182 }
183
184 return 0;
185
186fail_free:
187 nvgpu_dma_free(vm->mm->g, mem);
188 return err;
189}
190
191int nvgpu_dma_alloc_map_vid(struct vm_gk20a *vm, size_t size,
192 struct nvgpu_mem *mem)
193{
194 return nvgpu_dma_alloc_map_flags_vid(vm,
195 NVGPU_DMA_NO_KERNEL_MAPPING, size, mem);
196}
197
198int nvgpu_dma_alloc_map_flags_vid(struct vm_gk20a *vm, unsigned long flags,
199 size_t size, struct nvgpu_mem *mem)
200{
201 int err = nvgpu_dma_alloc_flags_vid(vm->mm->g, flags, size, mem);
202
203 if (err)
204 return err;
205
206 mem->gpu_va = nvgpu_gmmu_map(vm, mem, size, 0,
207 gk20a_mem_flag_none, false,
208 mem->aperture);
209 if (!mem->gpu_va) {
210 err = -ENOMEM;
211 goto fail_free;
212 }
213
214 return 0;
215
216fail_free:
217 nvgpu_dma_free(vm->mm->g, mem);
218 return err;
219}
220
221void nvgpu_dma_unmap_free(struct vm_gk20a *vm, struct nvgpu_mem *mem)
222{
223 if (mem->gpu_va)
224 nvgpu_gmmu_unmap(vm, mem, mem->gpu_va);
225 mem->gpu_va = 0;
226
227 nvgpu_dma_free(vm->mm->g, mem);
228}
generated by cgit v1.2.2 (git 2.25.0) at 2024-08-22 22:24:52 -0400