1 /*
2 * Copyright 2012 Nouveau Community
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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Martin Peres
23 */
24 #include <subdev/bios.h>
25 #include <subdev/bios/bit.h>
26 #include <subdev/bios/therm.h>
27
28 static u32
therm_table(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * len,u8 * cnt)29 therm_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt)
30 {
31 struct bit_entry bit_P;
32 u32 therm = 0;
33
34 if (!bit_entry(bios, 'P', &bit_P)) {
35 if (bit_P.version == 1)
36 therm = nvbios_rd32(bios, bit_P.offset + 12);
37 else if (bit_P.version == 2)
38 therm = nvbios_rd32(bios, bit_P.offset + 16);
39 else
40 nvkm_error(&bios->subdev,
41 "unknown offset for thermal in BIT P %d\n",
42 bit_P.version);
43 }
44
45 /* exit now if we haven't found the thermal table */
46 if (!therm)
47 return 0;
48
49 *ver = nvbios_rd08(bios, therm + 0);
50 *hdr = nvbios_rd08(bios, therm + 1);
51 *len = nvbios_rd08(bios, therm + 2);
52 *cnt = nvbios_rd08(bios, therm + 3);
53 return therm + nvbios_rd08(bios, therm + 1);
54 }
55
56 static u32
nvbios_therm_entry(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len)57 nvbios_therm_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
58 {
59 u8 hdr, cnt;
60 u32 therm = therm_table(bios, ver, &hdr, len, &cnt);
61 if (therm && idx < cnt)
62 return therm + idx * *len;
63 return 0;
64 }
65
66 int
nvbios_therm_sensor_parse(struct nvkm_bios * bios,enum nvbios_therm_domain domain,struct nvbios_therm_sensor * sensor)67 nvbios_therm_sensor_parse(struct nvkm_bios *bios,
68 enum nvbios_therm_domain domain,
69 struct nvbios_therm_sensor *sensor)
70 {
71 s8 thrs_section, sensor_section, offset;
72 u8 ver, len, i;
73 u32 entry;
74
75 /* we only support the core domain for now */
76 if (domain != NVBIOS_THERM_DOMAIN_CORE)
77 return -EINVAL;
78
79 /* Read the entries from the table */
80 thrs_section = 0;
81 sensor_section = -1;
82 i = 0;
83 while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
84 s16 value = nvbios_rd16(bios, entry + 1);
85
86 switch (nvbios_rd08(bios, entry + 0)) {
87 case 0x0:
88 thrs_section = value;
89 if (value > 0)
90 return 0; /* we do not try to support ambient */
91 break;
92 case 0x01:
93 sensor_section++;
94 if (sensor_section == 0) {
95 offset = ((s8) nvbios_rd08(bios, entry + 2)) / 2;
96 sensor->offset_constant = offset;
97 }
98 break;
99
100 case 0x04:
101 if (thrs_section == 0) {
102 sensor->thrs_critical.temp = (value & 0xff0) >> 4;
103 sensor->thrs_critical.hysteresis = value & 0xf;
104 }
105 break;
106
107 case 0x07:
108 if (thrs_section == 0) {
109 sensor->thrs_down_clock.temp = (value & 0xff0) >> 4;
110 sensor->thrs_down_clock.hysteresis = value & 0xf;
111 }
112 break;
113
114 case 0x08:
115 if (thrs_section == 0) {
116 sensor->thrs_fan_boost.temp = (value & 0xff0) >> 4;
117 sensor->thrs_fan_boost.hysteresis = value & 0xf;
118 }
119 break;
120
121 case 0x10:
122 if (sensor_section == 0)
123 sensor->offset_num = value;
124 break;
125
126 case 0x11:
127 if (sensor_section == 0)
128 sensor->offset_den = value;
129 break;
130
131 case 0x12:
132 if (sensor_section == 0)
133 sensor->slope_mult = value;
134 break;
135
136 case 0x13:
137 if (sensor_section == 0)
138 sensor->slope_div = value;
139 break;
140 case 0x32:
141 if (thrs_section == 0) {
142 sensor->thrs_shutdown.temp = (value & 0xff0) >> 4;
143 sensor->thrs_shutdown.hysteresis = value & 0xf;
144 }
145 break;
146 }
147 }
148
149 return 0;
150 }
151
152 int
nvbios_therm_fan_parse(struct nvkm_bios * bios,struct nvbios_therm_fan * fan)153 nvbios_therm_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan)
154 {
155 struct nvbios_therm_trip_point *cur_trip = NULL;
156 u8 ver, len, i;
157 u32 entry;
158
159 uint8_t duty_lut[] = { 0, 0, 25, 0, 40, 0, 50, 0,
160 75, 0, 85, 0, 100, 0, 100, 0 };
161
162 i = 0;
163 fan->nr_fan_trip = 0;
164 fan->fan_mode = NVBIOS_THERM_FAN_OTHER;
165 while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
166 s16 value = nvbios_rd16(bios, entry + 1);
167
168 switch (nvbios_rd08(bios, entry + 0)) {
169 case 0x22:
170 fan->min_duty = value & 0xff;
171 fan->max_duty = (value & 0xff00) >> 8;
172 break;
173 case 0x24:
174 fan->nr_fan_trip++;
175 if (fan->fan_mode > NVBIOS_THERM_FAN_TRIP)
176 fan->fan_mode = NVBIOS_THERM_FAN_TRIP;
177 cur_trip = &fan->trip[fan->nr_fan_trip - 1];
178 cur_trip->hysteresis = value & 0xf;
179 cur_trip->temp = (value & 0xff0) >> 4;
180 cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12];
181 break;
182 case 0x25:
183 cur_trip = &fan->trip[fan->nr_fan_trip - 1];
184 cur_trip->fan_duty = value;
185 break;
186 case 0x26:
187 if (!fan->pwm_freq)
188 fan->pwm_freq = value;
189 break;
190 case 0x3b:
191 fan->bump_period = value;
192 break;
193 case 0x3c:
194 fan->slow_down_period = value;
195 break;
196 case 0x46:
197 if (fan->fan_mode > NVBIOS_THERM_FAN_LINEAR)
198 fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
199 fan->linear_min_temp = nvbios_rd08(bios, entry + 1);
200 fan->linear_max_temp = nvbios_rd08(bios, entry + 2);
201 break;
202 }
203 }
204
205 /* starting from fermi, fan management is always linear */
206 if (bios->subdev.device->card_type >= NV_C0 &&
207 fan->fan_mode == NVBIOS_THERM_FAN_OTHER) {
208 fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
209 }
210
211 return 0;
212 }
213