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 #include <nvif/ioctl.h> 28 29 /*XXX*/ 30 #include <core/client.h> 31 32 #include "nouveau_drm.h" 33 #include "nouveau_dma.h" 34 #include "nouveau_bo.h" 35 #include "nouveau_chan.h" 36 #include "nouveau_fence.h" 37 #include "nouveau_abi16.h" 38 39 MODULE_PARM_DESC(vram_pushbuf, "Create DMA push buffers in VRAM"); 40 int nouveau_vram_pushbuf; 41 module_param_named(vram_pushbuf, nouveau_vram_pushbuf, int, 0400); 42 43 int 44 nouveau_channel_idle(struct nouveau_channel *chan) 45 { 46 if (likely(chan && chan->fence)) { 47 struct nouveau_cli *cli = (void *)chan->user.client; 48 struct nouveau_fence *fence = NULL; 49 int ret; 50 51 ret = nouveau_fence_new(chan, false, &fence); 52 if (!ret) { 53 ret = nouveau_fence_wait(fence, false, false); 54 nouveau_fence_unref(&fence); 55 } 56 57 if (ret) { 58 NV_PRINTK(err, cli, "failed to idle channel %d [%s]\n", 59 chan->chid, nvxx_client(&cli->base)->name); 60 return ret; 61 } 62 } 63 return 0; 64 } 65 66 void 67 nouveau_channel_del(struct nouveau_channel **pchan) 68 { 69 struct nouveau_channel *chan = *pchan; 70 if (chan) { 71 if (chan->fence) 72 nouveau_fence(chan->drm)->context_del(chan); 73 nvif_object_fini(&chan->nvsw); 74 nvif_object_fini(&chan->gart); 75 nvif_object_fini(&chan->vram); 76 nvif_object_fini(&chan->user); 77 nvif_object_fini(&chan->push.ctxdma); 78 nouveau_bo_vma_del(chan->push.buffer, &chan->push.vma); 79 nouveau_bo_unmap(chan->push.buffer); 80 if (chan->push.buffer && chan->push.buffer->pin_refcnt) 81 nouveau_bo_unpin(chan->push.buffer); 82 nouveau_bo_ref(NULL, &chan->push.buffer); 83 kfree(chan); 84 } 85 *pchan = NULL; 86 } 87 88 static int 89 nouveau_channel_prep(struct nouveau_drm *drm, struct nvif_device *device, 90 u32 size, struct nouveau_channel **pchan) 91 { 92 struct nouveau_cli *cli = (void *)device->object.client; 93 struct nvkm_mmu *mmu = nvxx_mmu(device); 94 struct nv_dma_v0 args = {}; 95 struct nouveau_channel *chan; 96 u32 target; 97 int ret; 98 99 chan = *pchan = kzalloc(sizeof(*chan), GFP_KERNEL); 100 if (!chan) 101 return -ENOMEM; 102 103 chan->device = device; 104 chan->drm = drm; 105 106 /* allocate memory for dma push buffer */ 107 target = TTM_PL_FLAG_TT | TTM_PL_FLAG_UNCACHED; 108 if (nouveau_vram_pushbuf) 109 target = TTM_PL_FLAG_VRAM; 110 111 ret = nouveau_bo_new(drm->dev, size, 0, target, 0, 0, NULL, NULL, 112 &chan->push.buffer); 113 if (ret == 0) { 114 ret = nouveau_bo_pin(chan->push.buffer, target, false); 115 if (ret == 0) 116 ret = nouveau_bo_map(chan->push.buffer); 117 } 118 119 if (ret) { 120 nouveau_channel_del(pchan); 121 return ret; 122 } 123 124 /* create dma object covering the *entire* memory space that the 125 * pushbuf lives in, this is because the GEM code requires that 126 * we be able to call out to other (indirect) push buffers 127 */ 128 chan->push.vma.offset = chan->push.buffer->bo.offset; 129 130 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) { 131 ret = nouveau_bo_vma_add(chan->push.buffer, cli->vm, 132 &chan->push.vma); 133 if (ret) { 134 nouveau_channel_del(pchan); 135 return ret; 136 } 137 138 args.target = NV_DMA_V0_TARGET_VM; 139 args.access = NV_DMA_V0_ACCESS_VM; 140 args.start = 0; 141 args.limit = cli->vm->mmu->limit - 1; 142 } else 143 if (chan->push.buffer->bo.mem.mem_type == TTM_PL_VRAM) { 144 if (device->info.family == NV_DEVICE_INFO_V0_TNT) { 145 /* nv04 vram pushbuf hack, retarget to its location in 146 * the framebuffer bar rather than direct vram access.. 147 * nfi why this exists, it came from the -nv ddx. 148 */ 149 args.target = NV_DMA_V0_TARGET_PCI; 150 args.access = NV_DMA_V0_ACCESS_RDWR; 151 args.start = nvxx_device(device)->func-> 152 resource_addr(nvxx_device(device), 1); 153 args.limit = args.start + device->info.ram_user - 1; 154 } else { 155 args.target = NV_DMA_V0_TARGET_VRAM; 156 args.access = NV_DMA_V0_ACCESS_RDWR; 157 args.start = 0; 158 args.limit = device->info.ram_user - 1; 159 } 160 } else { 161 if (chan->drm->agp.bridge) { 162 args.target = NV_DMA_V0_TARGET_AGP; 163 args.access = NV_DMA_V0_ACCESS_RDWR; 164 args.start = chan->drm->agp.base; 165 args.limit = chan->drm->agp.base + 166 chan->drm->agp.size - 1; 167 } else { 168 args.target = NV_DMA_V0_TARGET_VM; 169 args.access = NV_DMA_V0_ACCESS_RDWR; 170 args.start = 0; 171 args.limit = mmu->limit - 1; 172 } 173 } 174 175 ret = nvif_object_init(&device->object, 0, NV_DMA_FROM_MEMORY, 176 &args, sizeof(args), &chan->push.ctxdma); 177 if (ret) { 178 nouveau_channel_del(pchan); 179 return ret; 180 } 181 182 return 0; 183 } 184 185 static int 186 nouveau_channel_ind(struct nouveau_drm *drm, struct nvif_device *device, 187 u32 engine, struct nouveau_channel **pchan) 188 { 189 static const u16 oclasses[] = { MAXWELL_CHANNEL_GPFIFO_A, 190 KEPLER_CHANNEL_GPFIFO_A, 191 FERMI_CHANNEL_GPFIFO, 192 G82_CHANNEL_GPFIFO, 193 NV50_CHANNEL_GPFIFO, 194 0 }; 195 const u16 *oclass = oclasses; 196 union { 197 struct nv50_channel_gpfifo_v0 nv50; 198 struct fermi_channel_gpfifo_v0 fermi; 199 struct kepler_channel_gpfifo_a_v0 kepler; 200 } args; 201 struct nouveau_channel *chan; 202 u32 size; 203 int ret; 204 205 /* allocate dma push buffer */ 206 ret = nouveau_channel_prep(drm, device, 0x12000, &chan); 207 *pchan = chan; 208 if (ret) 209 return ret; 210 211 /* create channel object */ 212 do { 213 if (oclass[0] >= KEPLER_CHANNEL_GPFIFO_A) { 214 args.kepler.version = 0; 215 args.kepler.engine = engine; 216 args.kepler.ilength = 0x02000; 217 args.kepler.ioffset = 0x10000 + chan->push.vma.offset; 218 args.kepler.vm = 0; 219 size = sizeof(args.kepler); 220 } else 221 if (oclass[0] >= FERMI_CHANNEL_GPFIFO) { 222 args.fermi.version = 0; 223 args.fermi.ilength = 0x02000; 224 args.fermi.ioffset = 0x10000 + chan->push.vma.offset; 225 args.fermi.vm = 0; 226 size = sizeof(args.fermi); 227 } else { 228 args.nv50.version = 0; 229 args.nv50.ilength = 0x02000; 230 args.nv50.ioffset = 0x10000 + chan->push.vma.offset; 231 args.nv50.pushbuf = nvif_handle(&chan->push.ctxdma); 232 args.nv50.vm = 0; 233 size = sizeof(args.nv50); 234 } 235 236 ret = nvif_object_init(&device->object, 0, *oclass++, 237 &args, size, &chan->user); 238 if (ret == 0) { 239 if (chan->user.oclass >= KEPLER_CHANNEL_GPFIFO_A) 240 chan->chid = args.kepler.chid; 241 else 242 if (chan->user.oclass >= FERMI_CHANNEL_GPFIFO) 243 chan->chid = args.fermi.chid; 244 else 245 chan->chid = args.nv50.chid; 246 return ret; 247 } 248 } while (*oclass); 249 250 nouveau_channel_del(pchan); 251 return ret; 252 } 253 254 static int 255 nouveau_channel_dma(struct nouveau_drm *drm, struct nvif_device *device, 256 struct nouveau_channel **pchan) 257 { 258 static const u16 oclasses[] = { NV40_CHANNEL_DMA, 259 NV17_CHANNEL_DMA, 260 NV10_CHANNEL_DMA, 261 NV03_CHANNEL_DMA, 262 0 }; 263 const u16 *oclass = oclasses; 264 struct nv03_channel_dma_v0 args; 265 struct nouveau_channel *chan; 266 int ret; 267 268 /* allocate dma push buffer */ 269 ret = nouveau_channel_prep(drm, device, 0x10000, &chan); 270 *pchan = chan; 271 if (ret) 272 return ret; 273 274 /* create channel object */ 275 args.version = 0; 276 args.pushbuf = nvif_handle(&chan->push.ctxdma); 277 args.offset = chan->push.vma.offset; 278 279 do { 280 ret = nvif_object_init(&device->object, 0, *oclass++, 281 &args, sizeof(args), &chan->user); 282 if (ret == 0) { 283 chan->chid = args.chid; 284 return ret; 285 } 286 } while (ret && *oclass); 287 288 nouveau_channel_del(pchan); 289 return ret; 290 } 291 292 static int 293 nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart) 294 { 295 struct nvif_device *device = chan->device; 296 struct nouveau_cli *cli = (void *)chan->user.client; 297 struct nvkm_mmu *mmu = nvxx_mmu(device); 298 struct nv_dma_v0 args = {}; 299 int ret, i; 300 301 nvif_object_map(&chan->user); 302 303 /* allocate dma objects to cover all allowed vram, and gart */ 304 if (device->info.family < NV_DEVICE_INFO_V0_FERMI) { 305 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) { 306 args.target = NV_DMA_V0_TARGET_VM; 307 args.access = NV_DMA_V0_ACCESS_VM; 308 args.start = 0; 309 args.limit = cli->vm->mmu->limit - 1; 310 } else { 311 args.target = NV_DMA_V0_TARGET_VRAM; 312 args.access = NV_DMA_V0_ACCESS_RDWR; 313 args.start = 0; 314 args.limit = device->info.ram_user - 1; 315 } 316 317 ret = nvif_object_init(&chan->user, vram, NV_DMA_IN_MEMORY, 318 &args, sizeof(args), &chan->vram); 319 if (ret) 320 return ret; 321 322 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) { 323 args.target = NV_DMA_V0_TARGET_VM; 324 args.access = NV_DMA_V0_ACCESS_VM; 325 args.start = 0; 326 args.limit = cli->vm->mmu->limit - 1; 327 } else 328 if (chan->drm->agp.bridge) { 329 args.target = NV_DMA_V0_TARGET_AGP; 330 args.access = NV_DMA_V0_ACCESS_RDWR; 331 args.start = chan->drm->agp.base; 332 args.limit = chan->drm->agp.base + 333 chan->drm->agp.size - 1; 334 } else { 335 args.target = NV_DMA_V0_TARGET_VM; 336 args.access = NV_DMA_V0_ACCESS_RDWR; 337 args.start = 0; 338 args.limit = mmu->limit - 1; 339 } 340 341 ret = nvif_object_init(&chan->user, gart, NV_DMA_IN_MEMORY, 342 &args, sizeof(args), &chan->gart); 343 if (ret) 344 return ret; 345 } 346 347 /* initialise dma tracking parameters */ 348 switch (chan->user.oclass & 0x00ff) { 349 case 0x006b: 350 case 0x006e: 351 chan->user_put = 0x40; 352 chan->user_get = 0x44; 353 chan->dma.max = (0x10000 / 4) - 2; 354 break; 355 default: 356 chan->user_put = 0x40; 357 chan->user_get = 0x44; 358 chan->user_get_hi = 0x60; 359 chan->dma.ib_base = 0x10000 / 4; 360 chan->dma.ib_max = (0x02000 / 8) - 1; 361 chan->dma.ib_put = 0; 362 chan->dma.ib_free = chan->dma.ib_max - chan->dma.ib_put; 363 chan->dma.max = chan->dma.ib_base; 364 break; 365 } 366 367 chan->dma.put = 0; 368 chan->dma.cur = chan->dma.put; 369 chan->dma.free = chan->dma.max - chan->dma.cur; 370 371 ret = RING_SPACE(chan, NOUVEAU_DMA_SKIPS); 372 if (ret) 373 return ret; 374 375 for (i = 0; i < NOUVEAU_DMA_SKIPS; i++) 376 OUT_RING(chan, 0x00000000); 377 378 /* allocate software object class (used for fences on <= nv05) */ 379 if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) { 380 ret = nvif_object_init(&chan->user, 0x006e, 381 NVIF_IOCTL_NEW_V0_SW_NV04, 382 NULL, 0, &chan->nvsw); 383 if (ret) 384 return ret; 385 386 ret = RING_SPACE(chan, 2); 387 if (ret) 388 return ret; 389 390 BEGIN_NV04(chan, NvSubSw, 0x0000, 1); 391 OUT_RING (chan, chan->nvsw.handle); 392 FIRE_RING (chan); 393 } 394 395 /* initialise synchronisation */ 396 return nouveau_fence(chan->drm)->context_new(chan); 397 } 398 399 int 400 nouveau_channel_new(struct nouveau_drm *drm, struct nvif_device *device, 401 u32 arg0, u32 arg1, struct nouveau_channel **pchan) 402 { 403 struct nouveau_cli *cli = (void *)device->object.client; 404 bool super; 405 int ret; 406 407 /* hack until fencenv50 is fixed, and agp access relaxed */ 408 super = cli->base.super; 409 cli->base.super = true; 410 411 ret = nouveau_channel_ind(drm, device, arg0, pchan); 412 if (ret) { 413 NV_PRINTK(dbg, cli, "ib channel create, %d\n", ret); 414 ret = nouveau_channel_dma(drm, device, pchan); 415 if (ret) { 416 NV_PRINTK(dbg, cli, "dma channel create, %d\n", ret); 417 goto done; 418 } 419 } 420 421 ret = nouveau_channel_init(*pchan, arg0, arg1); 422 if (ret) { 423 NV_PRINTK(err, cli, "channel failed to initialise, %d\n", ret); 424 nouveau_channel_del(pchan); 425 } 426 427 done: 428 cli->base.super = super; 429 return ret; 430 } 431