1 /* 2 * Copyright 2012 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 23 */ 24 25 #include <nvif/os.h> 26 #include <nvif/class.h> 27 28 /*XXX*/ 29 #include <core/client.h> 30 31 #include "nouveau_drm.h" 32 #include "nouveau_dma.h" 33 #include "nouveau_bo.h" 34 #include "nouveau_chan.h" 35 #include "nouveau_fence.h" 36 #include "nouveau_abi16.h" 37 38 MODULE_PARM_DESC(vram_pushbuf, "Create DMA push buffers in VRAM"); 39 int nouveau_vram_pushbuf; 40 module_param_named(vram_pushbuf, nouveau_vram_pushbuf, int, 0400); 41 42 int 43 nouveau_channel_idle(struct nouveau_channel *chan) 44 { 45 struct nouveau_cli *cli = (void *)nvif_client(chan->object); 46 struct nouveau_fence *fence = NULL; 47 int ret; 48 49 ret = nouveau_fence_new(chan, false, &fence); 50 if (!ret) { 51 ret = nouveau_fence_wait(fence, false, false); 52 nouveau_fence_unref(&fence); 53 } 54 55 if (ret) 56 NV_PRINTK(error, cli, "failed to idle channel 0x%08x [%s]\n", 57 chan->object->handle, nvkm_client(&cli->base)->name); 58 return ret; 59 } 60 61 void 62 nouveau_channel_del(struct nouveau_channel **pchan) 63 { 64 struct nouveau_channel *chan = *pchan; 65 if (chan) { 66 if (chan->fence) { 67 nouveau_channel_idle(chan); 68 nouveau_fence(chan->drm)->context_del(chan); 69 } 70 nvif_object_fini(&chan->nvsw); 71 nvif_object_fini(&chan->gart); 72 nvif_object_fini(&chan->vram); 73 nvif_object_ref(NULL, &chan->object); 74 nvif_object_fini(&chan->push.ctxdma); 75 nouveau_bo_vma_del(chan->push.buffer, &chan->push.vma); 76 nouveau_bo_unmap(chan->push.buffer); 77 if (chan->push.buffer && chan->push.buffer->pin_refcnt) 78 nouveau_bo_unpin(chan->push.buffer); 79 nouveau_bo_ref(NULL, &chan->push.buffer); 80 nvif_device_ref(NULL, &chan->device); 81 kfree(chan); 82 } 83 *pchan = NULL; 84 } 85 86 static int 87 nouveau_channel_prep(struct nouveau_drm *drm, struct nvif_device *device, 88 u32 handle, u32 size, struct nouveau_channel **pchan) 89 { 90 struct nouveau_cli *cli = (void *)nvif_client(&device->base); 91 struct nouveau_vmmgr *vmm = nvkm_vmmgr(device); 92 struct nv_dma_v0 args = {}; 93 struct nouveau_channel *chan; 94 u32 target; 95 int ret; 96 97 chan = *pchan = kzalloc(sizeof(*chan), GFP_KERNEL); 98 if (!chan) 99 return -ENOMEM; 100 101 nvif_device_ref(device, &chan->device); 102 chan->drm = drm; 103 104 /* allocate memory for dma push buffer */ 105 target = TTM_PL_FLAG_TT; 106 if (nouveau_vram_pushbuf) 107 target = TTM_PL_FLAG_VRAM; 108 109 ret = nouveau_bo_new(drm->dev, size, 0, target, 0, 0, NULL, NULL, 110 &chan->push.buffer); 111 if (ret == 0) { 112 ret = nouveau_bo_pin(chan->push.buffer, target); 113 if (ret == 0) 114 ret = nouveau_bo_map(chan->push.buffer); 115 } 116 117 if (ret) { 118 nouveau_channel_del(pchan); 119 return ret; 120 } 121 122 /* create dma object covering the *entire* memory space that the 123 * pushbuf lives in, this is because the GEM code requires that 124 * we be able to call out to other (indirect) push buffers 125 */ 126 chan->push.vma.offset = chan->push.buffer->bo.offset; 127 128 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) { 129 ret = nouveau_bo_vma_add(chan->push.buffer, cli->vm, 130 &chan->push.vma); 131 if (ret) { 132 nouveau_channel_del(pchan); 133 return ret; 134 } 135 136 args.target = NV_DMA_V0_TARGET_VM; 137 args.access = NV_DMA_V0_ACCESS_VM; 138 args.start = 0; 139 args.limit = cli->vm->vmm->limit - 1; 140 } else 141 if (chan->push.buffer->bo.mem.mem_type == TTM_PL_VRAM) { 142 if (device->info.family == NV_DEVICE_INFO_V0_TNT) { 143 /* nv04 vram pushbuf hack, retarget to its location in 144 * the framebuffer bar rather than direct vram access.. 145 * nfi why this exists, it came from the -nv ddx. 146 */ 147 args.target = NV_DMA_V0_TARGET_PCI; 148 args.access = NV_DMA_V0_ACCESS_RDWR; 149 args.start = nv_device_resource_start(nvkm_device(device), 1); 150 args.limit = args.start + device->info.ram_user - 1; 151 } else { 152 args.target = NV_DMA_V0_TARGET_VRAM; 153 args.access = NV_DMA_V0_ACCESS_RDWR; 154 args.start = 0; 155 args.limit = device->info.ram_user - 1; 156 } 157 } else { 158 if (chan->drm->agp.stat == ENABLED) { 159 args.target = NV_DMA_V0_TARGET_AGP; 160 args.access = NV_DMA_V0_ACCESS_RDWR; 161 args.start = chan->drm->agp.base; 162 args.limit = chan->drm->agp.base + 163 chan->drm->agp.size - 1; 164 } else { 165 args.target = NV_DMA_V0_TARGET_VM; 166 args.access = NV_DMA_V0_ACCESS_RDWR; 167 args.start = 0; 168 args.limit = vmm->limit - 1; 169 } 170 } 171 172 ret = nvif_object_init(nvif_object(device), NULL, NVDRM_PUSH | 173 (handle & 0xffff), NV_DMA_FROM_MEMORY, 174 &args, sizeof(args), &chan->push.ctxdma); 175 if (ret) { 176 nouveau_channel_del(pchan); 177 return ret; 178 } 179 180 return 0; 181 } 182 183 static int 184 nouveau_channel_ind(struct nouveau_drm *drm, struct nvif_device *device, 185 u32 handle, u32 engine, struct nouveau_channel **pchan) 186 { 187 static const u16 oclasses[] = { KEPLER_CHANNEL_GPFIFO_A, 188 FERMI_CHANNEL_GPFIFO, 189 G82_CHANNEL_GPFIFO, 190 NV50_CHANNEL_GPFIFO, 191 0 }; 192 const u16 *oclass = oclasses; 193 union { 194 struct nv50_channel_gpfifo_v0 nv50; 195 struct kepler_channel_gpfifo_a_v0 kepler; 196 } args, *retn; 197 struct nouveau_channel *chan; 198 u32 size; 199 int ret; 200 201 /* allocate dma push buffer */ 202 ret = nouveau_channel_prep(drm, device, handle, 0x12000, &chan); 203 *pchan = chan; 204 if (ret) 205 return ret; 206 207 /* create channel object */ 208 do { 209 if (oclass[0] >= KEPLER_CHANNEL_GPFIFO_A) { 210 args.kepler.version = 0; 211 args.kepler.engine = engine; 212 args.kepler.pushbuf = chan->push.ctxdma.handle; 213 args.kepler.ilength = 0x02000; 214 args.kepler.ioffset = 0x10000 + chan->push.vma.offset; 215 size = sizeof(args.kepler); 216 } else { 217 args.nv50.version = 0; 218 args.nv50.pushbuf = chan->push.ctxdma.handle; 219 args.nv50.ilength = 0x02000; 220 args.nv50.ioffset = 0x10000 + chan->push.vma.offset; 221 size = sizeof(args.nv50); 222 } 223 224 ret = nvif_object_new(nvif_object(device), handle, *oclass++, 225 &args, size, &chan->object); 226 if (ret == 0) { 227 retn = chan->object->data; 228 if (chan->object->oclass >= KEPLER_CHANNEL_GPFIFO_A) 229 chan->chid = retn->kepler.chid; 230 else 231 chan->chid = retn->nv50.chid; 232 return ret; 233 } 234 } while (*oclass); 235 236 nouveau_channel_del(pchan); 237 return ret; 238 } 239 240 static int 241 nouveau_channel_dma(struct nouveau_drm *drm, struct nvif_device *device, 242 u32 handle, struct nouveau_channel **pchan) 243 { 244 static const u16 oclasses[] = { NV40_CHANNEL_DMA, 245 NV17_CHANNEL_DMA, 246 NV10_CHANNEL_DMA, 247 NV03_CHANNEL_DMA, 248 0 }; 249 const u16 *oclass = oclasses; 250 struct nv03_channel_dma_v0 args, *retn; 251 struct nouveau_channel *chan; 252 int ret; 253 254 /* allocate dma push buffer */ 255 ret = nouveau_channel_prep(drm, device, handle, 0x10000, &chan); 256 *pchan = chan; 257 if (ret) 258 return ret; 259 260 /* create channel object */ 261 args.version = 0; 262 args.pushbuf = chan->push.ctxdma.handle; 263 args.offset = chan->push.vma.offset; 264 265 do { 266 ret = nvif_object_new(nvif_object(device), handle, *oclass++, 267 &args, sizeof(args), &chan->object); 268 if (ret == 0) { 269 retn = chan->object->data; 270 chan->chid = retn->chid; 271 return ret; 272 } 273 } while (ret && *oclass); 274 275 nouveau_channel_del(pchan); 276 return ret; 277 } 278 279 static int 280 nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart) 281 { 282 struct nvif_device *device = chan->device; 283 struct nouveau_cli *cli = (void *)nvif_client(&device->base); 284 struct nouveau_vmmgr *vmm = nvkm_vmmgr(device); 285 struct nouveau_software_chan *swch; 286 struct nv_dma_v0 args = {}; 287 int ret, i; 288 bool save; 289 290 nvif_object_map(chan->object); 291 292 /* allocate dma objects to cover all allowed vram, and gart */ 293 if (device->info.family < NV_DEVICE_INFO_V0_FERMI) { 294 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) { 295 args.target = NV_DMA_V0_TARGET_VM; 296 args.access = NV_DMA_V0_ACCESS_VM; 297 args.start = 0; 298 args.limit = cli->vm->vmm->limit - 1; 299 } else { 300 args.target = NV_DMA_V0_TARGET_VRAM; 301 args.access = NV_DMA_V0_ACCESS_RDWR; 302 args.start = 0; 303 args.limit = device->info.ram_user - 1; 304 } 305 306 ret = nvif_object_init(chan->object, NULL, vram, 307 NV_DMA_IN_MEMORY, &args, 308 sizeof(args), &chan->vram); 309 if (ret) 310 return ret; 311 312 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) { 313 args.target = NV_DMA_V0_TARGET_VM; 314 args.access = NV_DMA_V0_ACCESS_VM; 315 args.start = 0; 316 args.limit = cli->vm->vmm->limit - 1; 317 } else 318 if (chan->drm->agp.stat == ENABLED) { 319 args.target = NV_DMA_V0_TARGET_AGP; 320 args.access = NV_DMA_V0_ACCESS_RDWR; 321 args.start = chan->drm->agp.base; 322 args.limit = chan->drm->agp.base + 323 chan->drm->agp.size - 1; 324 } else { 325 args.target = NV_DMA_V0_TARGET_VM; 326 args.access = NV_DMA_V0_ACCESS_RDWR; 327 args.start = 0; 328 args.limit = vmm->limit - 1; 329 } 330 331 ret = nvif_object_init(chan->object, NULL, gart, 332 NV_DMA_IN_MEMORY, &args, 333 sizeof(args), &chan->gart); 334 if (ret) 335 return ret; 336 } 337 338 /* initialise dma tracking parameters */ 339 switch (chan->object->oclass & 0x00ff) { 340 case 0x006b: 341 case 0x006e: 342 chan->user_put = 0x40; 343 chan->user_get = 0x44; 344 chan->dma.max = (0x10000 / 4) - 2; 345 break; 346 default: 347 chan->user_put = 0x40; 348 chan->user_get = 0x44; 349 chan->user_get_hi = 0x60; 350 chan->dma.ib_base = 0x10000 / 4; 351 chan->dma.ib_max = (0x02000 / 8) - 1; 352 chan->dma.ib_put = 0; 353 chan->dma.ib_free = chan->dma.ib_max - chan->dma.ib_put; 354 chan->dma.max = chan->dma.ib_base; 355 break; 356 } 357 358 chan->dma.put = 0; 359 chan->dma.cur = chan->dma.put; 360 chan->dma.free = chan->dma.max - chan->dma.cur; 361 362 ret = RING_SPACE(chan, NOUVEAU_DMA_SKIPS); 363 if (ret) 364 return ret; 365 366 for (i = 0; i < NOUVEAU_DMA_SKIPS; i++) 367 OUT_RING(chan, 0x00000000); 368 369 /* allocate software object class (used for fences on <= nv05) */ 370 if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) { 371 ret = nvif_object_init(chan->object, NULL, 0x006e, 0x006e, 372 NULL, 0, &chan->nvsw); 373 if (ret) 374 return ret; 375 376 swch = (void *)nvkm_object(&chan->nvsw)->parent; 377 swch->flip = nouveau_flip_complete; 378 swch->flip_data = chan; 379 380 ret = RING_SPACE(chan, 2); 381 if (ret) 382 return ret; 383 384 BEGIN_NV04(chan, NvSubSw, 0x0000, 1); 385 OUT_RING (chan, chan->nvsw.handle); 386 FIRE_RING (chan); 387 } 388 389 /* initialise synchronisation */ 390 save = cli->base.super; 391 cli->base.super = true; /* hack until fencenv50 fixed */ 392 ret = nouveau_fence(chan->drm)->context_new(chan); 393 cli->base.super = save; 394 return ret; 395 } 396 397 int 398 nouveau_channel_new(struct nouveau_drm *drm, struct nvif_device *device, 399 u32 handle, u32 arg0, u32 arg1, 400 struct nouveau_channel **pchan) 401 { 402 struct nouveau_cli *cli = (void *)nvif_client(&device->base); 403 int ret; 404 405 ret = nouveau_channel_ind(drm, device, handle, arg0, pchan); 406 if (ret) { 407 NV_PRINTK(debug, cli, "ib channel create, %d\n", ret); 408 ret = nouveau_channel_dma(drm, device, handle, pchan); 409 if (ret) { 410 NV_PRINTK(debug, cli, "dma channel create, %d\n", ret); 411 return ret; 412 } 413 } 414 415 ret = nouveau_channel_init(*pchan, arg0, arg1); 416 if (ret) { 417 NV_PRINTK(error, cli, "channel failed to initialise, %d\n", ret); 418 nouveau_channel_del(pchan); 419 return ret; 420 } 421 422 return 0; 423 } 424