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 33 static int 34 nvkm_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 66 static int 67 nvkm_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 } 138 139 static int 140 nvkm_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 } 167 168 static int 169 nvkm_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 } 184 185 static const struct nvkm_object_func 186 nvkm_control = { 187 .mthd = nvkm_control_mthd, 188 }; 189 190 static int 191 nvkm_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 } 204 205 const struct nvkm_device_oclass 206 nvkm_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