diff options
Diffstat (limited to 'drivers/gpu/nvgpu/gp106/xve_gp106.h')
-rw-r--r-- | drivers/gpu/nvgpu/gp106/xve_gp106.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/drivers/gpu/nvgpu/gp106/xve_gp106.h b/drivers/gpu/nvgpu/gp106/xve_gp106.h new file mode 100644 index 00000000..65c75bf0 --- /dev/null +++ b/drivers/gpu/nvgpu/gp106/xve_gp106.h | |||
@@ -0,0 +1,99 @@ | |||
1 | /* | ||
2 | * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. | ||
3 | * | ||
4 | * This program is free software; you can redistribute it and/or modify it | ||
5 | * under the terms and conditions of the GNU General Public License, | ||
6 | * version 2, as published by the Free Software Foundation. | ||
7 | * | ||
8 | * This program is distributed in the hope it will be useful, but WITHOUT | ||
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | ||
11 | * more details. | ||
12 | * | ||
13 | * You should have received a copy of the GNU General Public License | ||
14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
15 | */ | ||
16 | |||
17 | #ifndef __XVE_GP106_H__ | ||
18 | #define __XVE_GP106_H__ | ||
19 | |||
20 | #include "gk20a/gk20a.h" | ||
21 | |||
22 | int gp106_init_xve_ops(struct gpu_ops *gops); | ||
23 | |||
24 | /* | ||
25 | * Best guess for a reasonable timeout. | ||
26 | */ | ||
27 | #define GPU_XVE_TIMEOUT_MS 500 | ||
28 | |||
29 | /* | ||
30 | * For the available speeds bitmap. | ||
31 | */ | ||
32 | #define GPU_XVE_SPEED_2P5 (1 << 0) | ||
33 | #define GPU_XVE_SPEED_5P0 (1 << 1) | ||
34 | #define GPU_XVE_SPEED_8P0 (1 << 2) | ||
35 | #define GPU_XVE_NR_SPEEDS 3 | ||
36 | |||
37 | #define GPU_XVE_SPEED_MASK (GPU_XVE_SPEED_2P5 | \ | ||
38 | GPU_XVE_SPEED_5P0 | \ | ||
39 | GPU_XVE_SPEED_8P0) | ||
40 | |||
41 | /* | ||
42 | * The HW uses a 2 bit field where speed is defined by a number: | ||
43 | * | ||
44 | * NV_XVE_LINK_CONTROL_STATUS_LINK_SPEED_2P5 = 1 | ||
45 | * NV_XVE_LINK_CONTROL_STATUS_LINK_SPEED_5P0 = 2 | ||
46 | * NV_XVE_LINK_CONTROL_STATUS_LINK_SPEED_8P0 = 3 | ||
47 | * | ||
48 | * This isn't ideal for a bitmap with available speeds. So the external | ||
49 | * APIs think about speeds as a bit in a bitmap and this function converts | ||
50 | * from those bits to the actual HW speed setting. | ||
51 | * | ||
52 | * @speed_bit must have only 1 bit set and must be one of the 3 available | ||
53 | * HW speeds. Not all chips support all speeds so use available_speeds() to | ||
54 | * determine what a given chip supports. | ||
55 | */ | ||
56 | static inline u32 xve_speed_to_hw_speed_setting(u32 speed_bit) | ||
57 | { | ||
58 | if (!speed_bit || | ||
59 | !is_power_of_2(speed_bit) || | ||
60 | !(speed_bit & GPU_XVE_SPEED_MASK)) | ||
61 | return -EINVAL; | ||
62 | |||
63 | return ilog2(speed_bit) + 1; | ||
64 | } | ||
65 | |||
66 | static inline const char *xve_speed_to_str(u32 speed) | ||
67 | { | ||
68 | if (!speed || !is_power_of_2(speed) || | ||
69 | !(speed & GPU_XVE_SPEED_MASK)) | ||
70 | return "Unknown ???"; | ||
71 | |||
72 | return speed & GPU_XVE_SPEED_2P5 ? "Gen1" : | ||
73 | speed & GPU_XVE_SPEED_5P0 ? "Gen2" : | ||
74 | speed & GPU_XVE_SPEED_8P0 ? "Gen3" : | ||
75 | "Unknown ???"; | ||
76 | } | ||
77 | |||
78 | /* | ||
79 | * Debugging for the speed change. | ||
80 | */ | ||
81 | enum xv_speed_change_steps { | ||
82 | PRE_CHANGE = 0, | ||
83 | DISABLE_ASPM, | ||
84 | DL_SAFE_MODE, | ||
85 | CHECK_LINK, | ||
86 | LINK_SETTINGS, | ||
87 | EXEC_CHANGE, | ||
88 | EXEC_VERIF, | ||
89 | CLEANUP | ||
90 | }; | ||
91 | |||
92 | #define xv_dbg(fmt, args...) \ | ||
93 | gk20a_dbg(gpu_dbg_xv, fmt, ##args) | ||
94 | |||
95 | #define xv_sc_dbg(step, fmt, args...) \ | ||
96 | xv_dbg("[%d] %15s | " fmt, step, __stringify(step), ##args) | ||
97 | |||
98 | |||
99 | #endif | ||