drivers/gpu/drm/nouveau/core/engine/device/ctrl.c

   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
  25 #include <core/client.h>
  26 #include <core/object.h>
  27 #include <nvif/unpack.h>
  28 #include <nvif/class.h>
  29 #include <nvif/ioctl.h>
  30
  31 #include <subdev/clock.h>
  32
  33 #include "priv.h"
  34
  35 static int
  36 nouveau_control_mthd_pstate_info(struct nouveau_object *object,
  37                                  void *data, u32 size)
  38 {
  39         union {
  40                 struct nvif_control_pstate_info_v0 v0;
  41         } *args = data;
  42         struct nouveau_clock *clk = nouveau_clock(object);
  43         int ret;
  44
  45         nv_ioctl(object, "control pstate info size %d\n", size);
  46         if (nvif_unpack(args->v0, 0, 0, false)) {
  47                 nv_ioctl(object, "control pstate info vers %d\n",
  48                          args->v0.version);
  49         } else
  50                 return ret;
  51
  52         if (clk) {
  53                 args->v0.count = clk->state_nr;
  54                 args->v0.ustate_ac = clk->ustate_ac;
  55                 args->v0.ustate_dc = clk->ustate_dc;
  56                 args->v0.pwrsrc = clk->pwrsrc;
  57                 args->v0.pstate = clk->pstate;
  58         } else {
  59                 args->v0.count = 0;
  60                 args->v0.ustate_ac = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
  61                 args->v0.ustate_dc = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
  62                 args->v0.pwrsrc = -ENOSYS;
  63                 args->v0.pstate = NVIF_CONTROL_PSTATE_INFO_V0_PSTATE_UNKNOWN;
  64         }
  65
  66         return 0;
  67 }
  68
  69 static int
  70 nouveau_control_mthd_pstate_attr(struct nouveau_object *object,
  71                                  void *data, u32 size)
  72 {
  73         union {
  74                 struct nvif_control_pstate_attr_v0 v0;
  75         } *args = data;
  76         struct nouveau_clock *clk = nouveau_clock(object);
  77         struct nouveau_clocks *domain;
  78         struct nouveau_pstate *pstate;
  79         struct nouveau_cstate *cstate;
  80         int i = 0, j = -1;
  81         u32 lo, hi;
  82         int ret;
  83
  84         nv_ioctl(object, "control pstate attr size %d\n", size);
  85         if (nvif_unpack(args->v0, 0, 0, false)) {
  86                 nv_ioctl(object, "control pstate attr vers %d state %d "
  87                                  "index %d\n",
  88                          args->v0.version, args->v0.state, args->v0.index);
  89                 if (!clk)
  90                         return -ENODEV;
  91                 if (args->v0.state < NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT)
  92                         return -EINVAL;
  93                 if (args->v0.state >= clk->state_nr)
  94                         return -EINVAL;
  95         } else
  96                 return ret;
  97         domain = clk->domains;
  98
  99         while (domain->name != nv_clk_src_max) {
 100                 if (domain->mname && ++j == args->v0.index)
 101                         break;
 102                 domain++;
 103         }
 104
 105         if (domain->name == nv_clk_src_max)
 106                 return -EINVAL;
 107
 108         if (args->v0.state != NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT) {
 109                 list_for_each_entry(pstate, &clk->states, head) {
 110                         if (i++ == args->v0.state)
 111                                 break;
 112                 }
 113
 114                 lo = pstate->base.domain[domain->name];
 115                 hi = lo;
 116                 list_for_each_entry(cstate, &pstate->list, head) {
 117                         lo = min(lo, cstate->domain[domain->name]);
 118                         hi = max(hi, cstate->domain[domain->name]);
 119                 }
 120
 121                 args->v0.state = pstate->pstate;
 122         } else {
 123                 lo = max(clk->read(clk, domain->name), 0);
 124                 hi = lo;
 125         }
 126
 127         snprintf(args->v0.name, sizeof(args->v0.name), "%s", domain->mname);
 128         snprintf(args->v0.unit, sizeof(args->v0.unit), "MHz");
 129         args->v0.min = lo / domain->mdiv;
 130         args->v0.max = hi / domain->mdiv;
 131
 132         args->v0.index = 0;
 133         while ((++domain)->name != nv_clk_src_max) {
 134                 if (domain->mname) {
 135                         args->v0.index = ++j;
 136                         break;
 137                 }
 138         }
 139
 140         return 0;
 141 }
 142
 143 static int
 144 nouveau_control_mthd_pstate_user(struct nouveau_object *object,
 145                                  void *data, u32 size)
 146 {
 147         union {
 148                 struct nvif_control_pstate_user_v0 v0;
 149         } *args = data;
 150         struct nouveau_clock *clk = nouveau_clock(object);
 151         int ret;
 152
 153         nv_ioctl(object, "control pstate user size %d\n", size);
 154         if (nvif_unpack(args->v0, 0, 0, false)) {
 155                 nv_ioctl(object, "control pstate user vers %d ustate %d "
 156                                  "pwrsrc %d\n", args->v0.version,
 157                          args->v0.ustate, args->v0.pwrsrc);
 158                 if (!clk)
 159                         return -ENODEV;
 160         } else
 161                 return ret;
 162
 163         if (args->v0.pwrsrc >= 0) {
 164                 ret |= nouveau_clock_ustate(clk, args->v0.ustate, args->v0.pwrsrc);
 165         } else {
 166                 ret |= nouveau_clock_ustate(clk, args->v0.ustate, 0);
 167                 ret |= nouveau_clock_ustate(clk, args->v0.ustate, 1);
 168         }
 169
 170         return ret;
 171 }
 172
 173 static int
 174 nouveau_control_mthd(struct nouveau_object *object, u32 mthd,
 175                      void *data, u32 size)
 176 {
 177         switch (mthd) {
 178         case NVIF_CONTROL_PSTATE_INFO:
 179                 return nouveau_control_mthd_pstate_info(object, data, size);
 180         case NVIF_CONTROL_PSTATE_ATTR:
 181                 return nouveau_control_mthd_pstate_attr(object, data, size);
 182         case NVIF_CONTROL_PSTATE_USER:
 183                 return nouveau_control_mthd_pstate_user(object, data, size);
 184         default:
 185                 break;
 186         }
 187         return -EINVAL;
 188 }
 189
 190 static struct nouveau_ofuncs
 191 nouveau_control_ofuncs = {
 192         .ctor = _nouveau_object_ctor,
 193         .dtor = nouveau_object_destroy,
 194         .init = nouveau_object_init,
 195         .fini = nouveau_object_fini,
 196         .mthd = nouveau_control_mthd,
 197 };
 198
 199 struct nouveau_oclass
 200 nouveau_control_oclass[] = {
 201         { .handle = NVIF_IOCTL_NEW_V0_CONTROL,
 202           .ofuncs = &nouveau_control_ofuncs
 203         },
 204         {}
 205 };