329 lines
8.1 KiB
C
329 lines
8.1 KiB
C
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/*
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* Copyright 2013 Red Hat Inc.
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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: Ben Skeggs
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*/
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#include "priv.h"
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#include <subdev/bios.h>
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#include <subdev/bios/vmap.h>
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#include <subdev/bios/volt.h>
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#include <subdev/therm.h>
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int
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nvkm_volt_get(struct nvkm_volt *volt)
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{
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int ret, i;
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if (volt->func->volt_get)
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return volt->func->volt_get(volt);
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ret = volt->func->vid_get(volt);
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if (ret >= 0) {
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for (i = 0; i < volt->vid_nr; i++) {
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if (volt->vid[i].vid == ret)
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return volt->vid[i].uv;
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}
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ret = -EINVAL;
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}
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return ret;
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}
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static int
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nvkm_volt_set(struct nvkm_volt *volt, u32 uv)
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{
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struct nvkm_subdev *subdev = &volt->subdev;
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int i, ret = -EINVAL, best_err = volt->max_uv, best = -1;
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if (volt->func->volt_set)
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return volt->func->volt_set(volt, uv);
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for (i = 0; i < volt->vid_nr; i++) {
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int err = volt->vid[i].uv - uv;
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if (err < 0 || err > best_err)
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continue;
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best_err = err;
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best = i;
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if (best_err == 0)
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break;
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}
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if (best == -1) {
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nvkm_error(subdev, "couldn't set %iuv\n", uv);
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return ret;
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}
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ret = volt->func->vid_set(volt, volt->vid[best].vid);
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nvkm_debug(subdev, "set req %duv to %duv: %d\n", uv,
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volt->vid[best].uv, ret);
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return ret;
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}
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int
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nvkm_volt_map_min(struct nvkm_volt *volt, u8 id)
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{
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struct nvkm_bios *bios = volt->subdev.device->bios;
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struct nvbios_vmap_entry info;
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u8 ver, len;
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u32 vmap;
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vmap = nvbios_vmap_entry_parse(bios, id, &ver, &len, &info);
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if (vmap) {
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if (info.link != 0xff) {
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int ret = nvkm_volt_map_min(volt, info.link);
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if (ret < 0)
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return ret;
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info.min += ret;
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}
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return info.min;
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}
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return id ? id * 10000 : -ENODEV;
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}
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int
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nvkm_volt_map(struct nvkm_volt *volt, u8 id, u8 temp)
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{
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struct nvkm_bios *bios = volt->subdev.device->bios;
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struct nvbios_vmap_entry info;
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u8 ver, len;
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u32 vmap;
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vmap = nvbios_vmap_entry_parse(bios, id, &ver, &len, &info);
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if (vmap) {
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s64 result;
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if (volt->speedo < 0)
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return volt->speedo;
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if (ver == 0x10 || (ver == 0x20 && info.mode == 0)) {
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result = div64_s64((s64)info.arg[0], 10);
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result += div64_s64((s64)info.arg[1] * volt->speedo, 10);
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result += div64_s64((s64)info.arg[2] * volt->speedo * volt->speedo, 100000);
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} else if (ver == 0x20) {
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switch (info.mode) {
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/* 0x0 handled above! */
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case 0x1:
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result = ((s64)info.arg[0] * 15625) >> 18;
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result += ((s64)info.arg[1] * volt->speedo * 15625) >> 18;
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result += ((s64)info.arg[2] * temp * 15625) >> 10;
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result += ((s64)info.arg[3] * volt->speedo * temp * 15625) >> 18;
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result += ((s64)info.arg[4] * volt->speedo * volt->speedo * 15625) >> 30;
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result += ((s64)info.arg[5] * temp * temp * 15625) >> 18;
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break;
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case 0x3:
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result = (info.min + info.max) / 2;
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break;
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case 0x2:
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default:
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result = info.min;
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break;
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}
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} else {
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return -ENODEV;
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}
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result = min(max(result, (s64)info.min), (s64)info.max);
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if (info.link != 0xff) {
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int ret = nvkm_volt_map(volt, info.link, temp);
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if (ret < 0)
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return ret;
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result += ret;
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}
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return result;
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}
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return id ? id * 10000 : -ENODEV;
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}
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int
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nvkm_volt_set_id(struct nvkm_volt *volt, u8 id, u8 min_id, u8 temp,
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int condition)
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{
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int ret;
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if (volt->func->set_id)
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return volt->func->set_id(volt, id, condition);
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ret = nvkm_volt_map(volt, id, temp);
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if (ret >= 0) {
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int prev = nvkm_volt_get(volt);
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if (!condition || prev < 0 ||
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(condition < 0 && ret < prev) ||
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(condition > 0 && ret > prev)) {
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int min = nvkm_volt_map(volt, min_id, temp);
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if (min >= 0)
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ret = max(min, ret);
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ret = nvkm_volt_set(volt, ret);
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} else {
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ret = 0;
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}
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}
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return ret;
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}
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static void
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nvkm_volt_parse_bios(struct nvkm_bios *bios, struct nvkm_volt *volt)
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{
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struct nvkm_subdev *subdev = &bios->subdev;
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struct nvbios_volt_entry ivid;
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struct nvbios_volt info;
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u8 ver, hdr, cnt, len;
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u32 data;
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int i;
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data = nvbios_volt_parse(bios, &ver, &hdr, &cnt, &len, &info);
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if (data && info.vidmask && info.base && info.step && info.ranged) {
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nvkm_debug(subdev, "found ranged based VIDs\n");
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volt->min_uv = info.min;
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volt->max_uv = info.max;
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for (i = 0; i < info.vidmask + 1; i++) {
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if (info.base >= info.min &&
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info.base <= info.max) {
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volt->vid[volt->vid_nr].uv = info.base;
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volt->vid[volt->vid_nr].vid = i;
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volt->vid_nr++;
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}
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info.base += info.step;
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}
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volt->vid_mask = info.vidmask;
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} else if (data && info.vidmask && !info.ranged) {
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nvkm_debug(subdev, "found entry based VIDs\n");
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volt->min_uv = 0xffffffff;
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volt->max_uv = 0;
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for (i = 0; i < cnt; i++) {
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data = nvbios_volt_entry_parse(bios, i, &ver, &hdr,
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&ivid);
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if (data) {
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volt->vid[volt->vid_nr].uv = ivid.voltage;
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volt->vid[volt->vid_nr].vid = ivid.vid;
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volt->vid_nr++;
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volt->min_uv = min(volt->min_uv, ivid.voltage);
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volt->max_uv = max(volt->max_uv, ivid.voltage);
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}
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}
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volt->vid_mask = info.vidmask;
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} else if (data && info.type == NVBIOS_VOLT_PWM) {
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volt->min_uv = info.base;
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volt->max_uv = info.base + info.pwm_range;
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}
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}
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static int
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nvkm_volt_speedo_read(struct nvkm_volt *volt)
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{
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if (volt->func->speedo_read)
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return volt->func->speedo_read(volt);
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return -EINVAL;
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}
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static int
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nvkm_volt_init(struct nvkm_subdev *subdev)
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{
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struct nvkm_volt *volt = nvkm_volt(subdev);
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int ret = nvkm_volt_get(volt);
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if (ret < 0) {
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if (ret != -ENODEV)
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nvkm_debug(subdev, "current voltage unknown\n");
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return 0;
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}
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nvkm_debug(subdev, "current voltage: %duv\n", ret);
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return 0;
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}
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static int
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nvkm_volt_oneinit(struct nvkm_subdev *subdev)
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{
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struct nvkm_volt *volt = nvkm_volt(subdev);
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volt->speedo = nvkm_volt_speedo_read(volt);
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if (volt->speedo > 0)
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nvkm_debug(&volt->subdev, "speedo %x\n", volt->speedo);
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if (volt->func->oneinit)
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return volt->func->oneinit(volt);
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return 0;
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}
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static void *
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nvkm_volt_dtor(struct nvkm_subdev *subdev)
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{
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return nvkm_volt(subdev);
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}
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static const struct nvkm_subdev_func
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nvkm_volt = {
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.dtor = nvkm_volt_dtor,
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.init = nvkm_volt_init,
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.oneinit = nvkm_volt_oneinit,
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};
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void
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nvkm_volt_ctor(const struct nvkm_volt_func *func, struct nvkm_device *device,
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enum nvkm_subdev_type type, int inst, struct nvkm_volt *volt)
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{
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struct nvkm_bios *bios = device->bios;
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int i;
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nvkm_subdev_ctor(&nvkm_volt, device, type, inst, &volt->subdev);
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volt->func = func;
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/* Assuming the non-bios device should build the voltage table later */
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if (bios) {
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u8 ver, hdr, cnt, len;
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struct nvbios_vmap vmap;
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nvkm_volt_parse_bios(bios, volt);
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nvkm_debug(&volt->subdev, "min: %iuv max: %iuv\n",
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volt->min_uv, volt->max_uv);
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if (nvbios_vmap_parse(bios, &ver, &hdr, &cnt, &len, &vmap)) {
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volt->max0_id = vmap.max0;
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volt->max1_id = vmap.max1;
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volt->max2_id = vmap.max2;
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} else {
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volt->max0_id = 0xff;
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volt->max1_id = 0xff;
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volt->max2_id = 0xff;
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}
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}
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if (volt->vid_nr) {
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for (i = 0; i < volt->vid_nr; i++) {
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nvkm_debug(&volt->subdev, "VID %02x: %duv\n",
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volt->vid[i].vid, volt->vid[i].uv);
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}
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}
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}
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int
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nvkm_volt_new_(const struct nvkm_volt_func *func, struct nvkm_device *device,
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enum nvkm_subdev_type type, int inst, struct nvkm_volt **pvolt)
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{
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if (!(*pvolt = kzalloc(sizeof(**pvolt), GFP_KERNEL)))
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return -ENOMEM;
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nvkm_volt_ctor(func, device, type, inst, *pvolt);
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return 0;
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}
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