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