kernel/drivers/gpu/drm/nouveau/nvkm/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 #include "priv.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
  33 static int
  34 nvkm_control_mthd_pstate_info(struct nvkm_object *object, void *data, u32 size)
  35 {
  36         union {
  37                 struct nvif_control_pstate_info_v0 v0;
  38         } *args = data;
  39         struct nvkm_clk *clk = nvkm_clk(object);
  40         int ret;
  41
  42         nv_ioctl(object, "control pstate info size %d\n", size);
  43         if (nvif_unpack(args->v0, 0, 0, false)) {
  44                 nv_ioctl(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
  66 static int
  67 nvkm_control_mthd_pstate_attr(struct nvkm_object *object, void *data, u32 size)
  68 {
  69         union {
  70                 struct nvif_control_pstate_attr_v0 v0;
  71         } *args = data;
  72         struct nvkm_clk *clk = nvkm_clk(object);
  73         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         nv_ioctl(object, "control pstate attr size %d\n", size);
  81         if (nvif_unpack(args->v0, 0, 0, false)) {
  82                 nv_ioctl(object, "control pstate attr vers %d state %d "
  83                                  "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(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
 139 static int
 140 nvkm_control_mthd_pstate_user(struct nvkm_object *object, void *data, u32 size)
 141 {
 142         union {
 143                 struct nvif_control_pstate_user_v0 v0;
 144         } *args = data;
 145         struct nvkm_clk *clk = nvkm_clk(object);
 146         int ret;
 147
 148         nv_ioctl(object, "control pstate user size %d\n", size);
 149         if (nvif_unpack(args->v0, 0, 0, false)) {
 150                 nv_ioctl(object, "control pstate user vers %d ustate %d "
 151                                  "pwrsrc %d\n", args->v0.version,
 152                          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
 168 static int
 169 nvkm_control_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 170 {
 171         switch (mthd) {
 172         case NVIF_CONTROL_PSTATE_INFO:
 173                 return nvkm_control_mthd_pstate_info(object, data, size);
 174         case NVIF_CONTROL_PSTATE_ATTR:
 175                 return nvkm_control_mthd_pstate_attr(object, data, size);
 176         case NVIF_CONTROL_PSTATE_USER:
 177                 return nvkm_control_mthd_pstate_user(object, data, size);
 178         default:
 179                 break;
 180         }
 181         return -EINVAL;
 182 }
 183
 184 static struct nvkm_ofuncs
 185 nvkm_control_ofuncs = {
 186         .ctor = _nvkm_object_ctor,
 187         .dtor = nvkm_object_destroy,
 188         .init = nvkm_object_init,
 189         .fini = nvkm_object_fini,
 190         .mthd = nvkm_control_mthd,
 191 };
 192
 193 struct nvkm_oclass
 194 nvkm_control_oclass[] = {
 195         { .handle = NVIF_IOCTL_NEW_V0_CONTROL,
 196           .ofuncs = &nvkm_control_ofuncs
 197         },
 198         {}
 199 };