1 /* 2 * Copyright 2014 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 <nvif/object.h> 26 #include <nvif/client.h> 27 #include <nvif/driver.h> 28 #include <nvif/ioctl.h> 29 30 int 31 nvif_object_ioctl(struct nvif_object *object, void *data, u32 size, void **hack) 32 { 33 struct nvif_client *client = object->client; 34 union { 35 struct nvif_ioctl_v0 v0; 36 } *args = data; 37 38 if (size >= sizeof(*args) && args->v0.version == 0) { 39 if (object != &client->object) 40 args->v0.object = nvif_handle(object); 41 else 42 args->v0.object = 0; 43 args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY; 44 } else 45 return -ENOSYS; 46 47 return client->driver->ioctl(client->object.priv, data, size, hack); 48 } 49 50 void 51 nvif_object_sclass_put(struct nvif_sclass **psclass) 52 { 53 kfree(*psclass); 54 *psclass = NULL; 55 } 56 57 int 58 nvif_object_sclass_get(struct nvif_object *object, struct nvif_sclass **psclass) 59 { 60 struct { 61 struct nvif_ioctl_v0 ioctl; 62 struct nvif_ioctl_sclass_v0 sclass; 63 } *args = NULL; 64 int ret, cnt = 0, i; 65 u32 size; 66 67 while (1) { 68 size = sizeof(*args) + cnt * sizeof(args->sclass.oclass[0]); 69 if (!(args = kmalloc(size, GFP_KERNEL))) 70 return -ENOMEM; 71 args->ioctl.version = 0; 72 args->ioctl.type = NVIF_IOCTL_V0_SCLASS; 73 args->sclass.version = 0; 74 args->sclass.count = cnt; 75 76 ret = nvif_object_ioctl(object, args, size, NULL); 77 if (ret == 0 && args->sclass.count <= cnt) 78 break; 79 cnt = args->sclass.count; 80 kfree(args); 81 if (ret != 0) 82 return ret; 83 } 84 85 *psclass = kcalloc(args->sclass.count, sizeof(**psclass), GFP_KERNEL); 86 if (*psclass) { 87 for (i = 0; i < args->sclass.count; i++) { 88 (*psclass)[i].oclass = args->sclass.oclass[i].oclass; 89 (*psclass)[i].minver = args->sclass.oclass[i].minver; 90 (*psclass)[i].maxver = args->sclass.oclass[i].maxver; 91 } 92 ret = args->sclass.count; 93 } else { 94 ret = -ENOMEM; 95 } 96 97 kfree(args); 98 return ret; 99 } 100 101 u32 102 nvif_object_rd(struct nvif_object *object, int size, u64 addr) 103 { 104 struct { 105 struct nvif_ioctl_v0 ioctl; 106 struct nvif_ioctl_rd_v0 rd; 107 } args = { 108 .ioctl.type = NVIF_IOCTL_V0_RD, 109 .rd.size = size, 110 .rd.addr = addr, 111 }; 112 int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL); 113 if (ret) { 114 /*XXX: warn? */ 115 return 0; 116 } 117 return args.rd.data; 118 } 119 120 void 121 nvif_object_wr(struct nvif_object *object, int size, u64 addr, u32 data) 122 { 123 struct { 124 struct nvif_ioctl_v0 ioctl; 125 struct nvif_ioctl_wr_v0 wr; 126 } args = { 127 .ioctl.type = NVIF_IOCTL_V0_WR, 128 .wr.size = size, 129 .wr.addr = addr, 130 .wr.data = data, 131 }; 132 int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL); 133 if (ret) { 134 /*XXX: warn? */ 135 } 136 } 137 138 int 139 nvif_object_mthd(struct nvif_object *object, u32 mthd, void *data, u32 size) 140 { 141 struct { 142 struct nvif_ioctl_v0 ioctl; 143 struct nvif_ioctl_mthd_v0 mthd; 144 } *args; 145 u8 stack[128]; 146 int ret; 147 148 if (sizeof(*args) + size > sizeof(stack)) { 149 if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) 150 return -ENOMEM; 151 } else { 152 args = (void *)stack; 153 } 154 args->ioctl.version = 0; 155 args->ioctl.type = NVIF_IOCTL_V0_MTHD; 156 args->mthd.version = 0; 157 args->mthd.method = mthd; 158 159 memcpy(args->mthd.data, data, size); 160 ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL); 161 memcpy(data, args->mthd.data, size); 162 if (args != (void *)stack) 163 kfree(args); 164 return ret; 165 } 166 167 void 168 nvif_object_unmap_handle(struct nvif_object *object) 169 { 170 struct { 171 struct nvif_ioctl_v0 ioctl; 172 struct nvif_ioctl_unmap unmap; 173 } args = { 174 .ioctl.type = NVIF_IOCTL_V0_UNMAP, 175 }; 176 177 nvif_object_ioctl(object, &args, sizeof(args), NULL); 178 } 179 180 int 181 nvif_object_map_handle(struct nvif_object *object, void *argv, u32 argc, 182 u64 *handle, u64 *length) 183 { 184 struct { 185 struct nvif_ioctl_v0 ioctl; 186 struct nvif_ioctl_map_v0 map; 187 } *args; 188 u32 argn = sizeof(*args) + argc; 189 int ret, maptype; 190 191 if (!(args = kzalloc(argn, GFP_KERNEL))) 192 return -ENOMEM; 193 args->ioctl.type = NVIF_IOCTL_V0_MAP; 194 memcpy(args->map.data, argv, argc); 195 196 ret = nvif_object_ioctl(object, args, argn, NULL); 197 *handle = args->map.handle; 198 *length = args->map.length; 199 maptype = args->map.type; 200 kfree(args); 201 return ret ? ret : (maptype == NVIF_IOCTL_MAP_V0_IO); 202 } 203 204 void 205 nvif_object_unmap(struct nvif_object *object) 206 { 207 struct nvif_client *client = object->client; 208 if (object->map.ptr) { 209 if (object->map.size) { 210 client->driver->unmap(client, object->map.ptr, 211 object->map.size); 212 object->map.size = 0; 213 } 214 object->map.ptr = NULL; 215 nvif_object_unmap_handle(object); 216 } 217 } 218 219 int 220 nvif_object_map(struct nvif_object *object, void *argv, u32 argc) 221 { 222 struct nvif_client *client = object->client; 223 u64 handle, length; 224 int ret = nvif_object_map_handle(object, argv, argc, &handle, &length); 225 if (ret >= 0) { 226 if (ret) { 227 object->map.ptr = client->driver->map(client, 228 handle, 229 length); 230 if (ret = -ENOMEM, object->map.ptr) { 231 object->map.size = length; 232 return 0; 233 } 234 } else { 235 object->map.ptr = (void *)(unsigned long)handle; 236 return 0; 237 } 238 nvif_object_unmap_handle(object); 239 } 240 return ret; 241 } 242 243 void 244 nvif_object_dtor(struct nvif_object *object) 245 { 246 struct { 247 struct nvif_ioctl_v0 ioctl; 248 struct nvif_ioctl_del del; 249 } args = { 250 .ioctl.type = NVIF_IOCTL_V0_DEL, 251 }; 252 253 if (!nvif_object_constructed(object)) 254 return; 255 256 nvif_object_unmap(object); 257 nvif_object_ioctl(object, &args, sizeof(args), NULL); 258 object->client = NULL; 259 } 260 261 int 262 nvif_object_ctor(struct nvif_object *parent, const char *name, u32 handle, 263 s32 oclass, void *data, u32 size, struct nvif_object *object) 264 { 265 struct { 266 struct nvif_ioctl_v0 ioctl; 267 struct nvif_ioctl_new_v0 new; 268 } *args; 269 int ret = 0; 270 271 object->client = NULL; 272 object->name = name ? name : "nvifObject"; 273 object->handle = handle; 274 object->oclass = oclass; 275 object->map.ptr = NULL; 276 object->map.size = 0; 277 278 if (parent) { 279 if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) { 280 nvif_object_dtor(object); 281 return -ENOMEM; 282 } 283 284 object->parent = parent->parent; 285 286 args->ioctl.version = 0; 287 args->ioctl.type = NVIF_IOCTL_V0_NEW; 288 args->new.version = 0; 289 args->new.route = parent->client->route; 290 args->new.token = nvif_handle(object); 291 args->new.object = nvif_handle(object); 292 args->new.handle = handle; 293 args->new.oclass = oclass; 294 295 memcpy(args->new.data, data, size); 296 ret = nvif_object_ioctl(parent, args, sizeof(*args) + size, 297 &object->priv); 298 memcpy(data, args->new.data, size); 299 kfree(args); 300 if (ret == 0) 301 object->client = parent->client; 302 } 303 304 if (ret) 305 nvif_object_dtor(object); 306 return ret; 307 } 308