Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/bios/power_budget.c
/*
* Copyright 2016 Karol Herbst
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Karol Herbst
*/
#include <subdev/bios.h>
#include <subdev/bios/bit.h>
#include <subdev/bios/power_budget.h>
static u32
nvbios_power_budget_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt,
u8 *len)
{
struct bit_entry bit_P;
u32 power_budget;
if (bit_entry(bios, 'P', &bit_P) || bit_P.version != 2 ||
bit_P.length < 0x2c)
return 0;
power_budget = nvbios_rd32(bios, bit_P.offset + 0x2c);
if (!power_budget)
return 0;
*ver = nvbios_rd08(bios, power_budget);
switch (*ver) {
case 0x20:
case 0x30:
*hdr = nvbios_rd08(bios, power_budget + 0x1);
*len = nvbios_rd08(bios, power_budget + 0x2);
*cnt = nvbios_rd08(bios, power_budget + 0x3);
return power_budget;
default:
break;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Karol Herbst | 149 | 100.00% | 1 | 100.00% |
| Total | 149 | 100.00% | 1 | 100.00% |
int
nvbios_power_budget_header(struct nvkm_bios *bios,
struct nvbios_power_budget *budget)
{
struct nvkm_subdev *subdev = &bios->subdev;
u8 ver, hdr, cnt, len, cap_entry;
u32 header;
if (!bios || !budget)
return -EINVAL;
header = nvbios_power_budget_table(bios, &ver, &hdr, &cnt, &len);
if (!header || !cnt)
return -ENODEV;
switch (ver) {
case 0x20:
cap_entry = nvbios_rd08(bios, header + 0x9);
break;
case 0x30:
cap_entry = nvbios_rd08(bios, header + 0xa);
break;
default:
cap_entry = 0xff;
}
if (cap_entry >= cnt && cap_entry != 0xff) {
nvkm_warn(subdev,
"invalid cap_entry in power budget table found\n");
budget->cap_entry = 0xff;
return -EINVAL;
}
budget->offset = header;
budget->ver = ver;
budget->hlen = hdr;
budget->elen = len;
budget->ecount = cnt;
budget->cap_entry = cap_entry;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Karol Herbst | 191 | 100.00% | 1 | 100.00% |
| Total | 191 | 100.00% | 1 | 100.00% |
int
nvbios_power_budget_entry(struct nvkm_bios *bios,
struct nvbios_power_budget *budget,
u8 idx, struct nvbios_power_budget_entry *entry)
{
u32 entry_offset;
if (!bios || !budget || !budget->offset || idx >= budget->ecount
|| !entry)
return -EINVAL;
entry_offset = budget->offset + budget->hlen + idx * budget->elen;
if (budget->ver >= 0x20) {
entry->min_w = nvbios_rd32(bios, entry_offset + 0x2);
entry->avg_w = nvbios_rd32(bios, entry_offset + 0x6);
entry->max_w = nvbios_rd32(bios, entry_offset + 0xa);
} else {
entry->min_w = 0;
entry->max_w = nvbios_rd32(bios, entry_offset + 0x2);
entry->avg_w = entry->max_w;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Karol Herbst | 150 | 100.00% | 1 | 100.00% |
| Total | 150 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Karol Herbst | 500 | 100.00% | 1 | 100.00% |
| Total | 500 | 100.00% | 1 | 100.00% |
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