linux/drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c
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   1/*
   2 * Copyright 2013 Red Hat Inc.
   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: Ben Skeggs <bskeggs@redhat.com>
  23 */
  24#include "ctrl.h"
  25
  26#include <core/client.h>
  27#include <subdev/clk.h>
  28
  29#include <nvif/class.h>
  30#include <nvif/ioctl.h>
  31#include <nvif/unpack.h>
  32
  33static int
  34nvkm_control_mthd_pstate_info(struct nvkm_control *ctrl, void *data, u32 size)
  35{
  36        union {
  37                struct nvif_control_pstate_info_v0 v0;
  38        } *args = data;
  39        struct nvkm_clk *clk = ctrl->device->clk;
  40        int ret;
  41
  42        nvif_ioctl(&ctrl->object, "control pstate info size %d\n", size);
  43        if (nvif_unpack(args->v0, 0, 0, false)) {
  44                nvif_ioctl(&ctrl->object, "control pstate info vers %d\n",
  45                           args->v0.version);
  46        } else
  47                return ret;
  48
  49        if (clk) {
  50                args->v0.count = clk->state_nr;
  51                args->v0.ustate_ac = clk->ustate_ac;
  52                args->v0.ustate_dc = clk->ustate_dc;
  53                args->v0.pwrsrc = clk->pwrsrc;
  54                args->v0.pstate = clk->pstate;
  55        } else {
  56                args->v0.count = 0;
  57                args->v0.ustate_ac = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
  58                args->v0.ustate_dc = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
  59                args->v0.pwrsrc = -ENOSYS;
  60                args->v0.pstate = NVIF_CONTROL_PSTATE_INFO_V0_PSTATE_UNKNOWN;
  61        }
  62
  63        return 0;
  64}
  65
  66static int
  67nvkm_control_mthd_pstate_attr(struct nvkm_control *ctrl, void *data, u32 size)
  68{
  69        union {
  70                struct nvif_control_pstate_attr_v0 v0;
  71        } *args = data;
  72        struct nvkm_clk *clk = ctrl->device->clk;
  73        const struct nvkm_domain *domain;
  74        struct nvkm_pstate *pstate;
  75        struct nvkm_cstate *cstate;
  76        int i = 0, j = -1;
  77        u32 lo, hi;
  78        int ret;
  79
  80        nvif_ioctl(&ctrl->object, "control pstate attr size %d\n", size);
  81        if (nvif_unpack(args->v0, 0, 0, false)) {
  82                nvif_ioctl(&ctrl->object,
  83                           "control pstate attr vers %d state %d index %d\n",
  84                           args->v0.version, args->v0.state, args->v0.index);
  85                if (!clk)
  86                        return -ENODEV;
  87                if (args->v0.state < NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT)
  88                        return -EINVAL;
  89                if (args->v0.state >= clk->state_nr)
  90                        return -EINVAL;
  91        } else
  92                return ret;
  93        domain = clk->domains;
  94
  95        while (domain->name != nv_clk_src_max) {
  96                if (domain->mname && ++j == args->v0.index)
  97                        break;
  98                domain++;
  99        }
 100
 101        if (domain->name == nv_clk_src_max)
 102                return -EINVAL;
 103
 104        if (args->v0.state != NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT) {
 105                list_for_each_entry(pstate, &clk->states, head) {
 106                        if (i++ == args->v0.state)
 107                                break;
 108                }
 109
 110                lo = pstate->base.domain[domain->name];
 111                hi = lo;
 112                list_for_each_entry(cstate, &pstate->list, head) {
 113                        lo = min(lo, cstate->domain[domain->name]);
 114                        hi = max(hi, cstate->domain[domain->name]);
 115                }
 116
 117                args->v0.state = pstate->pstate;
 118        } else {
 119                lo = max(nvkm_clk_read(clk, domain->name), 0);
 120                hi = lo;
 121        }
 122
 123        snprintf(args->v0.name, sizeof(args->v0.name), "%s", domain->mname);
 124        snprintf(args->v0.unit, sizeof(args->v0.unit), "MHz");
 125        args->v0.min = lo / domain->mdiv;
 126        args->v0.max = hi / domain->mdiv;
 127
 128        args->v0.index = 0;
 129        while ((++domain)->name != nv_clk_src_max) {
 130                if (domain->mname) {
 131                        args->v0.index = ++j;
 132                        break;
 133                }
 134        }
 135
 136        return 0;
 137}
 138
 139static int
 140nvkm_control_mthd_pstate_user(struct nvkm_control *ctrl, void *data, u32 size)
 141{
 142        union {
 143                struct nvif_control_pstate_user_v0 v0;
 144        } *args = data;
 145        struct nvkm_clk *clk = ctrl->device->clk;
 146        int ret;
 147
 148        nvif_ioctl(&ctrl->object, "control pstate user size %d\n", size);
 149        if (nvif_unpack(args->v0, 0, 0, false)) {
 150                nvif_ioctl(&ctrl->object,
 151                           "control pstate user vers %d ustate %d pwrsrc %d\n",
 152                           args->v0.version, args->v0.ustate, args->v0.pwrsrc);
 153                if (!clk)
 154                        return -ENODEV;
 155        } else
 156                return ret;
 157
 158        if (args->v0.pwrsrc >= 0) {
 159                ret |= nvkm_clk_ustate(clk, args->v0.ustate, args->v0.pwrsrc);
 160        } else {
 161                ret |= nvkm_clk_ustate(clk, args->v0.ustate, 0);
 162                ret |= nvkm_clk_ustate(clk, args->v0.ustate, 1);
 163        }
 164
 165        return ret;
 166}
 167
 168static int
 169nvkm_control_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 170{
 171        struct nvkm_control *ctrl = nvkm_control(object);
 172        switch (mthd) {
 173        case NVIF_CONTROL_PSTATE_INFO:
 174                return nvkm_control_mthd_pstate_info(ctrl, data, size);
 175        case NVIF_CONTROL_PSTATE_ATTR:
 176                return nvkm_control_mthd_pstate_attr(ctrl, data, size);
 177        case NVIF_CONTROL_PSTATE_USER:
 178                return nvkm_control_mthd_pstate_user(ctrl, data, size);
 179        default:
 180                break;
 181        }
 182        return -EINVAL;
 183}
 184
 185static const struct nvkm_object_func
 186nvkm_control = {
 187        .mthd = nvkm_control_mthd,
 188};
 189
 190static int
 191nvkm_control_new(struct nvkm_device *device, const struct nvkm_oclass *oclass,
 192                 void *data, u32 size, struct nvkm_object **pobject)
 193{
 194        struct nvkm_control *ctrl;
 195
 196        if (!(ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL)))
 197                return -ENOMEM;
 198        *pobject = &ctrl->object;
 199        ctrl->device = device;
 200
 201        nvkm_object_ctor(&nvkm_control, oclass, &ctrl->object);
 202        return 0;
 203}
 204
 205const struct nvkm_device_oclass
 206nvkm_control_oclass = {
 207        .base.oclass = NVIF_IOCTL_NEW_V0_CONTROL,
 208        .base.minver = -1,
 209        .base.maxver = -1,
 210        .ctor = nvkm_control_new,
 211};
 212