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/object.h>
  26 #include <core/class.h>
  27
  28 #include <subdev/clock.h>
  29
  30 #include "priv.h"
  31
  32 static int
  33 nouveau_control_mthd_pstate_info(struct nouveau_object *object, u32 mthd,
  34                                 void *data, u32 size)
  35 {
  36         struct nouveau_clock *clk = nouveau_clock(object);
  37         struct nv_control_pstate_info *args = data;
  38
  39         if (size < sizeof(*args))
  40                 return -EINVAL;
  41
  42         if (clk) {
  43                 args->count  = clk->state_nr;
  44                 args->ustate = clk->ustate;
  45                 args->pstate = clk->pstate;
  46         } else {
  47                 args->count  = 0;
  48                 args->ustate = NV_CONTROL_PSTATE_INFO_USTATE_DISABLE;
  49                 args->pstate = NV_CONTROL_PSTATE_INFO_PSTATE_UNKNOWN;
  50         }
  51
  52         return 0;
  53 }
  54
  55 static int
  56 nouveau_control_mthd_pstate_attr(struct nouveau_object *object, u32 mthd,
  57                                 void *data, u32 size)
  58 {
  59         struct nouveau_clock *clk = nouveau_clock(object);
  60         struct nv_control_pstate_attr *args = data;
  61         struct nouveau_clocks *domain;
  62         struct nouveau_pstate *pstate;
  63         struct nouveau_cstate *cstate;
  64         int i = 0, j = -1;
  65         u32 lo, hi;
  66
  67         if ((size < sizeof(*args)) || !clk ||
  68             (args->state >= 0 && args->state >= clk->state_nr))
  69                 return -EINVAL;
  70         domain = clk->domains;
  71
  72         while (domain->name != nv_clk_src_max) {
  73                 if (domain->mname && ++j == args->index)
  74                         break;
  75                 domain++;
  76         }
  77
  78         if (domain->name == nv_clk_src_max)
  79                 return -EINVAL;
  80
  81         if (args->state != NV_CONTROL_PSTATE_ATTR_STATE_CURRENT) {
  82                 list_for_each_entry(pstate, &clk->states, head) {
  83                         if (i++ == args->state)
  84                                 break;
  85                 }
  86
  87                 lo = pstate->base.domain[domain->name];
  88                 hi = lo;
  89                 list_for_each_entry(cstate, &pstate->list, head) {
  90                         lo = min(lo, cstate->domain[domain->name]);
  91                         hi = max(hi, cstate->domain[domain->name]);
  92                 }
  93
  94                 args->state = pstate->pstate;
  95         } else {
  96                 lo = max(clk->read(clk, domain->name), 0);
  97                 hi = lo;
  98         }
  99
 100         snprintf(args->name, sizeof(args->name), "%s", domain->mname);
 101         snprintf(args->unit, sizeof(args->unit), "MHz");
 102         args->min = lo / domain->mdiv;
 103         args->max = hi / domain->mdiv;
 104
 105         args->index = 0;
 106         while ((++domain)->name != nv_clk_src_max) {
 107                 if (domain->mname) {
 108                         args->index = ++j;
 109                         break;
 110                 }
 111         }
 112
 113         return 0;
 114 }
 115
 116 static int
 117 nouveau_control_mthd_pstate_user(struct nouveau_object *object, u32 mthd,
 118                                 void *data, u32 size)
 119 {
 120         struct nouveau_clock *clk = nouveau_clock(object);
 121         struct nv_control_pstate_user *args = data;
 122
 123         if (size < sizeof(*args) || !clk)
 124                 return -EINVAL;
 125
 126         return nouveau_clock_ustate(clk, args->state);
 127 }
 128
 129 struct nouveau_oclass
 130 nouveau_control_oclass[] = {
 131         { .handle = NV_CONTROL_CLASS,
 132           .ofuncs = &nouveau_object_ofuncs,
 133           .omthds = (struct nouveau_omthds[]) {
 134                   { NV_CONTROL_PSTATE_INFO,
 135                     NV_CONTROL_PSTATE_INFO, nouveau_control_mthd_pstate_info },
 136                   { NV_CONTROL_PSTATE_ATTR,
 137                     NV_CONTROL_PSTATE_ATTR, nouveau_control_mthd_pstate_attr },
 138                   { NV_CONTROL_PSTATE_USER,
 139                     NV_CONTROL_PSTATE_USER, nouveau_control_mthd_pstate_user },
 140                   {},
 141           },
 142         },
 143         {}
 144 };