diff options
Diffstat (limited to 'drivers/gpu/nvgpu/common/ltc.c')
-rw-r--r-- | drivers/gpu/nvgpu/common/ltc.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/gpu/nvgpu/common/ltc.c b/drivers/gpu/nvgpu/common/ltc.c new file mode 100644 index 00000000..006e2ed2 --- /dev/null +++ b/drivers/gpu/nvgpu/common/ltc.c | |||
@@ -0,0 +1,64 @@ | |||
1 | /* | ||
2 | * Copyright (c) 2017, 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 <nvgpu/ltc.h> | ||
24 | #include <nvgpu/dma.h> | ||
25 | |||
26 | #include "gk20a/gk20a.h" | ||
27 | #include "gk20a/gr_gk20a.h" | ||
28 | |||
29 | int nvgpu_init_ltc_support(struct gk20a *g) | ||
30 | { | ||
31 | nvgpu_spinlock_init(&g->ltc_enabled_lock); | ||
32 | |||
33 | g->mm.ltc_enabled_current = true; | ||
34 | g->mm.ltc_enabled_target = true; | ||
35 | |||
36 | if (g->ops.ltc.init_fs_state) | ||
37 | g->ops.ltc.init_fs_state(g); | ||
38 | |||
39 | return 0; | ||
40 | } | ||
41 | |||
42 | void nvgpu_ltc_sync_enabled(struct gk20a *g) | ||
43 | { | ||
44 | nvgpu_spinlock_acquire(&g->ltc_enabled_lock); | ||
45 | if (g->mm.ltc_enabled_current != g->mm.ltc_enabled_target) { | ||
46 | g->ops.ltc.set_enabled(g, g->mm.ltc_enabled_target); | ||
47 | g->mm.ltc_enabled_current = g->mm.ltc_enabled_target; | ||
48 | } | ||
49 | nvgpu_spinlock_release(&g->ltc_enabled_lock); | ||
50 | } | ||
51 | |||
52 | int nvgpu_ltc_alloc_cbc(struct gk20a *g, size_t compbit_backing_size) | ||
53 | { | ||
54 | struct gr_gk20a *gr = &g->gr; | ||
55 | unsigned long flags = 0; | ||
56 | |||
57 | if (!nvgpu_iommuable(g)) | ||
58 | flags = NVGPU_DMA_FORCE_CONTIGUOUS; | ||
59 | |||
60 | return nvgpu_dma_alloc_flags_sys(g, | ||
61 | flags, | ||
62 | compbit_backing_size, | ||
63 | &gr->compbit_store.mem); | ||
64 | } | ||