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/if0001.h> 31 #include <nvif/ioctl.h> 32 #include <nvif/unpack.h> 33 34 static int 35 nvkm_control_mthd_pstate_info(struct nvkm_control *ctrl, void *data, u32 size) 36 { 37 union { 38 struct nvif_control_pstate_info_v0 v0; 39 } *args = data; 40 struct nvkm_clk *clk = ctrl->device->clk; 41 int ret = -ENOSYS; 42 43 nvif_ioctl(&ctrl->object, "control pstate info size %d\n", size); 44 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) { 45 nvif_ioctl(&ctrl->object, "control pstate info vers %d\n", 46 args->v0.version); 47 } else 48 return ret; 49 50 if (clk) { 51 args->v0.count = clk->state_nr; 52 args->v0.ustate_ac = clk->ustate_ac; 53 args->v0.ustate_dc = clk->ustate_dc; 54 args->v0.pwrsrc = clk->pwrsrc; 55 args->v0.pstate = clk->pstate; 56 } else { 57 args->v0.count = 0; 58 args->v0.ustate_ac = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE; 59 args->v0.ustate_dc = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE; 60 args->v0.pwrsrc = -ENODEV; 61 args->v0.pstate = NVIF_CONTROL_PSTATE_INFO_V0_PSTATE_UNKNOWN; 62 } 63 64 return 0; 65 } 66 67 static int 68 nvkm_control_mthd_pstate_attr(struct nvkm_control *ctrl, void *data, u32 size) 69 { 70 union { 71 struct nvif_control_pstate_attr_v0 v0; 72 } *args = data; 73 struct nvkm_clk *clk = ctrl->device->clk; 74 const struct nvkm_domain *domain; 75 struct nvkm_pstate *pstate; 76 struct nvkm_cstate *cstate; 77 bool found = false; 78 int i = 0, j = -1; 79 u32 lo, hi; 80 int ret = -ENOSYS; 81 82 nvif_ioctl(&ctrl->object, "control pstate attr size %d\n", size); 83 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) { 84 nvif_ioctl(&ctrl->object, 85 "control pstate attr vers %d state %d index %d\n", 86 args->v0.version, args->v0.state, args->v0.index); 87 if (!clk) 88 return -ENODEV; 89 if (args->v0.state < NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT) 90 return -EINVAL; 91 if (args->v0.state >= clk->state_nr) 92 return -EINVAL; 93 } else 94 return ret; 95 domain = clk->domains; 96 97 while (domain->name != nv_clk_src_max) { 98 if (domain->mname && ++j == args->v0.index) 99 break; 100 domain++; 101 } 102 103 if (domain->name == nv_clk_src_max) 104 return -EINVAL; 105 106 if (args->v0.state != NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT) { 107 list_for_each_entry(pstate, &clk->states, head) { 108 if (i++ == args->v0.state) { 109 found = true; 110 break; 111 } 112 } 113 114 if (!found) 115 return -EINVAL; 116 117 lo = pstate->base.domain[domain->name]; 118 hi = lo; 119 list_for_each_entry(cstate, &pstate->list, head) { 120 lo = min(lo, cstate->domain[domain->name]); 121 hi = max(hi, cstate->domain[domain->name]); 122 } 123 124 args->v0.state = pstate->pstate; 125 } else { 126 lo = max(nvkm_clk_read(clk, domain->name), 0); 127 hi = lo; 128 } 129 130 snprintf(args->v0.name, sizeof(args->v0.name), "%s", domain->mname); 131 snprintf(args->v0.unit, sizeof(args->v0.unit), "MHz"); 132 args->v0.min = lo / domain->mdiv; 133 args->v0.max = hi / domain->mdiv; 134 135 args->v0.index = 0; 136 while ((++domain)->name != nv_clk_src_max) { 137 if (domain->mname) { 138 args->v0.index = ++j; 139 break; 140 } 141 } 142 143 return 0; 144 } 145 146 static int 147 nvkm_control_mthd_pstate_user(struct nvkm_control *ctrl, void *data, u32 size) 148 { 149 union { 150 struct nvif_control_pstate_user_v0 v0; 151 } *args = data; 152 struct nvkm_clk *clk = ctrl->device->clk; 153 int ret = -ENOSYS; 154 155 nvif_ioctl(&ctrl->object, "control pstate user size %d\n", size); 156 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) { 157 nvif_ioctl(&ctrl->object, 158 "control pstate user vers %d ustate %d pwrsrc %d\n", 159 args->v0.version, args->v0.ustate, args->v0.pwrsrc); 160 if (!clk) 161 return -ENODEV; 162 } else 163 return ret; 164 165 if (args->v0.pwrsrc >= 0) { 166 ret |= nvkm_clk_ustate(clk, args->v0.ustate, args->v0.pwrsrc); 167 } else { 168 ret |= nvkm_clk_ustate(clk, args->v0.ustate, 0); 169 ret |= nvkm_clk_ustate(clk, args->v0.ustate, 1); 170 } 171 172 return ret; 173 } 174 175 static int 176 nvkm_control_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size) 177 { 178 struct nvkm_control *ctrl = nvkm_control(object); 179 switch (mthd) { 180 case NVIF_CONTROL_PSTATE_INFO: 181 return nvkm_control_mthd_pstate_info(ctrl, data, size); 182 case NVIF_CONTROL_PSTATE_ATTR: 183 return nvkm_control_mthd_pstate_attr(ctrl, data, size); 184 case NVIF_CONTROL_PSTATE_USER: 185 return nvkm_control_mthd_pstate_user(ctrl, data, size); 186 default: 187 break; 188 } 189 return -EINVAL; 190 } 191 192 static const struct nvkm_object_func 193 nvkm_control = { 194 .mthd = nvkm_control_mthd, 195 }; 196 197 static int 198 nvkm_control_new(struct nvkm_device *device, const struct nvkm_oclass *oclass, 199 void *data, u32 size, struct nvkm_object **pobject) 200 { 201 struct nvkm_control *ctrl; 202 203 if (!(ctrl = kzalloc_obj(*ctrl))) 204 return -ENOMEM; 205 *pobject = &ctrl->object; 206 ctrl->device = device; 207 208 nvkm_object_ctor(&nvkm_control, oclass, &ctrl->object); 209 return 0; 210 } 211 212 const struct nvkm_device_oclass 213 nvkm_control_oclass = { 214 .base.oclass = NVIF_CLASS_CONTROL, 215 .base.minver = -1, 216 .base.maxver = -1, 217 .ctor = nvkm_control_new, 218 }; 219