1 /* $NetBSD: nouveau_nvkm_subdev_bios_therm.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Nouveau Community
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 * Authors: Martin Peres
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_therm.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
28
29 #include <subdev/bios.h>
30 #include <subdev/bios/bit.h>
31 #include <subdev/bios/therm.h>
32
33 static u32
therm_table(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * len,u8 * cnt)34 therm_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt)
35 {
36 struct bit_entry bit_P;
37 u32 therm = 0;
38
39 if (!bit_entry(bios, 'P', &bit_P)) {
40 if (bit_P.version == 1)
41 therm = nvbios_rd32(bios, bit_P.offset + 12);
42 else if (bit_P.version == 2)
43 therm = nvbios_rd32(bios, bit_P.offset + 16);
44 else
45 nvkm_error(&bios->subdev,
46 "unknown offset for thermal in BIT P %d\n",
47 bit_P.version);
48 }
49
50 /* exit now if we haven't found the thermal table */
51 if (!therm)
52 return 0;
53
54 *ver = nvbios_rd08(bios, therm + 0);
55 *hdr = nvbios_rd08(bios, therm + 1);
56 *len = nvbios_rd08(bios, therm + 2);
57 *cnt = nvbios_rd08(bios, therm + 3);
58 return therm + nvbios_rd08(bios, therm + 1);
59 }
60
61 static u32
nvbios_therm_entry(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len)62 nvbios_therm_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
63 {
64 u8 hdr, cnt;
65 u32 therm = therm_table(bios, ver, &hdr, len, &cnt);
66 if (therm && idx < cnt)
67 return therm + idx * *len;
68 return 0;
69 }
70
71 int
nvbios_therm_sensor_parse(struct nvkm_bios * bios,enum nvbios_therm_domain domain,struct nvbios_therm_sensor * sensor)72 nvbios_therm_sensor_parse(struct nvkm_bios *bios,
73 enum nvbios_therm_domain domain,
74 struct nvbios_therm_sensor *sensor)
75 {
76 s8 thrs_section, sensor_section, offset;
77 u8 ver, len, i;
78 u32 entry;
79
80 /* we only support the core domain for now */
81 if (domain != NVBIOS_THERM_DOMAIN_CORE)
82 return -EINVAL;
83
84 /* Read the entries from the table */
85 thrs_section = 0;
86 sensor_section = -1;
87 i = 0;
88 while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
89 s16 value = nvbios_rd16(bios, entry + 1);
90
91 switch (nvbios_rd08(bios, entry + 0)) {
92 case 0x0:
93 thrs_section = value;
94 if (value > 0)
95 return 0; /* we do not try to support ambient */
96 break;
97 case 0x01:
98 sensor_section++;
99 if (sensor_section == 0) {
100 offset = ((s8) nvbios_rd08(bios, entry + 2)) / 2;
101 sensor->offset_constant = offset;
102 }
103 break;
104
105 case 0x04:
106 if (thrs_section == 0) {
107 sensor->thrs_critical.temp = (value & 0xff0) >> 4;
108 sensor->thrs_critical.hysteresis = value & 0xf;
109 }
110 break;
111
112 case 0x07:
113 if (thrs_section == 0) {
114 sensor->thrs_down_clock.temp = (value & 0xff0) >> 4;
115 sensor->thrs_down_clock.hysteresis = value & 0xf;
116 }
117 break;
118
119 case 0x08:
120 if (thrs_section == 0) {
121 sensor->thrs_fan_boost.temp = (value & 0xff0) >> 4;
122 sensor->thrs_fan_boost.hysteresis = value & 0xf;
123 }
124 break;
125
126 case 0x10:
127 if (sensor_section == 0)
128 sensor->offset_num = value;
129 break;
130
131 case 0x11:
132 if (sensor_section == 0)
133 sensor->offset_den = value;
134 break;
135
136 case 0x12:
137 if (sensor_section == 0)
138 sensor->slope_mult = value;
139 break;
140
141 case 0x13:
142 if (sensor_section == 0)
143 sensor->slope_div = value;
144 break;
145 case 0x32:
146 if (thrs_section == 0) {
147 sensor->thrs_shutdown.temp = (value & 0xff0) >> 4;
148 sensor->thrs_shutdown.hysteresis = value & 0xf;
149 }
150 break;
151 }
152 }
153
154 return 0;
155 }
156
157 int
nvbios_therm_fan_parse(struct nvkm_bios * bios,struct nvbios_therm_fan * fan)158 nvbios_therm_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan)
159 {
160 struct nvbios_therm_trip_point *cur_trip = NULL;
161 u8 ver, len, i;
162 u32 entry;
163
164 uint8_t duty_lut[] = { 0, 0, 25, 0, 40, 0, 50, 0,
165 75, 0, 85, 0, 100, 0, 100, 0 };
166
167 i = 0;
168 fan->nr_fan_trip = 0;
169 fan->fan_mode = NVBIOS_THERM_FAN_OTHER;
170 while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
171 s16 value = nvbios_rd16(bios, entry + 1);
172
173 switch (nvbios_rd08(bios, entry + 0)) {
174 case 0x22:
175 fan->min_duty = value & 0xff;
176 fan->max_duty = (value & 0xff00) >> 8;
177 break;
178 case 0x24:
179 fan->nr_fan_trip++;
180 if (fan->fan_mode > NVBIOS_THERM_FAN_TRIP)
181 fan->fan_mode = NVBIOS_THERM_FAN_TRIP;
182 cur_trip = &fan->trip[fan->nr_fan_trip - 1];
183 cur_trip->hysteresis = value & 0xf;
184 cur_trip->temp = (value & 0xff0) >> 4;
185 cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12];
186 break;
187 case 0x25:
188 cur_trip = &fan->trip[fan->nr_fan_trip - 1];
189 cur_trip->fan_duty = value;
190 break;
191 case 0x26:
192 if (!fan->pwm_freq)
193 fan->pwm_freq = value;
194 break;
195 case 0x3b:
196 fan->bump_period = value;
197 break;
198 case 0x3c:
199 fan->slow_down_period = value;
200 break;
201 case 0x46:
202 if (fan->fan_mode > NVBIOS_THERM_FAN_LINEAR)
203 fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
204 fan->linear_min_temp = nvbios_rd08(bios, entry + 1);
205 fan->linear_max_temp = nvbios_rd08(bios, entry + 2);
206 break;
207 }
208 }
209
210 /* starting from fermi, fan management is always linear */
211 if (bios->subdev.device->card_type >= NV_C0 &&
212 fan->fan_mode == NVBIOS_THERM_FAN_OTHER) {
213 fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
214 }
215
216 return 0;
217 }
218