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1 | /* |
2 | * Copyright 2014 Advanced Micro Devices, Inc. | |
3 | * Copyright 2008 Red Hat Inc. | |
4 | * Copyright 2009 Jerome Glisse. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the "Software"), | |
8 | * to deal in the Software without restriction, including without limitation | |
9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
10 | * and/or sell copies of the Software, and to permit persons to whom the | |
11 | * Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
22 | * OTHER DEALINGS IN THE SOFTWARE. | |
23 | * | |
24 | */ | |
25 | #include <drm/drmP.h> | |
26 | #include "amdgpu.h" | |
27 | ||
28 | /* | |
29 | * GPU scratch registers helpers function. | |
30 | */ | |
31 | /** | |
32 | * amdgpu_gfx_scratch_get - Allocate a scratch register | |
33 | * | |
34 | * @adev: amdgpu_device pointer | |
35 | * @reg: scratch register mmio offset | |
36 | * | |
37 | * Allocate a CP scratch register for use by the driver (all asics). | |
38 | * Returns 0 on success or -EINVAL on failure. | |
39 | */ | |
40 | int amdgpu_gfx_scratch_get(struct amdgpu_device *adev, uint32_t *reg) | |
41 | { | |
42 | int i; | |
43 | ||
44 | for (i = 0; i < adev->gfx.scratch.num_reg; i++) { | |
45 | if (adev->gfx.scratch.free[i]) { | |
46 | adev->gfx.scratch.free[i] = false; | |
47 | *reg = adev->gfx.scratch.reg[i]; | |
48 | return 0; | |
49 | } | |
50 | } | |
51 | return -EINVAL; | |
52 | } | |
53 | ||
54 | /** | |
55 | * amdgpu_gfx_scratch_free - Free a scratch register | |
56 | * | |
57 | * @adev: amdgpu_device pointer | |
58 | * @reg: scratch register mmio offset | |
59 | * | |
60 | * Free a CP scratch register allocated for use by the driver (all asics) | |
61 | */ | |
62 | void amdgpu_gfx_scratch_free(struct amdgpu_device *adev, uint32_t reg) | |
63 | { | |
64 | int i; | |
65 | ||
66 | for (i = 0; i < adev->gfx.scratch.num_reg; i++) { | |
67 | if (adev->gfx.scratch.reg[i] == reg) { | |
68 | adev->gfx.scratch.free[i] = true; | |
69 | return; | |
70 | } | |
71 | } | |
72 | } | |
6f8941a2 NH |
73 | |
74 | /** | |
75 | * amdgpu_gfx_parse_disable_cu - Parse the disable_cu module parameter | |
76 | * | |
77 | * @mask: array in which the per-shader array disable masks will be stored | |
78 | * @max_se: number of SEs | |
79 | * @max_sh: number of SHs | |
80 | * | |
81 | * The bitmask of CUs to be disabled in the shader array determined by se and | |
82 | * sh is stored in mask[se * max_sh + sh]. | |
83 | */ | |
84 | void amdgpu_gfx_parse_disable_cu(unsigned *mask, unsigned max_se, unsigned max_sh) | |
85 | { | |
86 | unsigned se, sh, cu; | |
87 | const char *p; | |
88 | ||
89 | memset(mask, 0, sizeof(*mask) * max_se * max_sh); | |
90 | ||
91 | if (!amdgpu_disable_cu || !*amdgpu_disable_cu) | |
92 | return; | |
93 | ||
94 | p = amdgpu_disable_cu; | |
95 | for (;;) { | |
96 | char *next; | |
97 | int ret = sscanf(p, "%u.%u.%u", &se, &sh, &cu); | |
98 | if (ret < 3) { | |
99 | DRM_ERROR("amdgpu: could not parse disable_cu\n"); | |
100 | return; | |
101 | } | |
102 | ||
103 | if (se < max_se && sh < max_sh && cu < 16) { | |
104 | DRM_INFO("amdgpu: disabling CU %u.%u.%u\n", se, sh, cu); | |
105 | mask[se * max_sh + sh] |= 1u << cu; | |
106 | } else { | |
107 | DRM_ERROR("amdgpu: disable_cu %u.%u.%u is out of range\n", | |
108 | se, sh, cu); | |
109 | } | |
110 | ||
111 | next = strchr(p, ','); | |
112 | if (!next) | |
113 | break; | |
114 | p = next + 1; | |
115 | } | |
116 | } |