| 1 | /* |
| 2 | * Copyright © 2008-2010 Intel Corporation |
| 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 (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| 21 | * IN THE SOFTWARE. |
| 22 | * |
| 23 | * Authors: |
| 24 | * Eric Anholt <eric@anholt.net> |
| 25 | * Zou Nan hai <nanhai.zou@intel.com> |
| 26 | * Xiang Hai hao<haihao.xiang@intel.com> |
| 27 | * |
| 28 | */ |
| 29 | |
| 30 | #include <drm/drmP.h> |
| 31 | #include "i915_drv.h" |
| 32 | #include <drm/i915_drm.h> |
| 33 | #include "i915_trace.h" |
| 34 | #include "intel_drv.h" |
| 35 | |
| 36 | bool |
| 37 | intel_ring_initialized(struct intel_engine_cs *ring) |
| 38 | { |
| 39 | struct drm_device *dev = ring->dev; |
| 40 | |
| 41 | if (!dev) |
| 42 | return false; |
| 43 | |
| 44 | if (i915.enable_execlists) { |
| 45 | struct intel_context *dctx = ring->default_context; |
| 46 | struct intel_ringbuffer *ringbuf = dctx->engine[ring->id].ringbuf; |
| 47 | |
| 48 | return ringbuf->obj; |
| 49 | } else |
| 50 | return ring->buffer && ring->buffer->obj; |
| 51 | } |
| 52 | |
| 53 | int __intel_ring_space(int head, int tail, int size) |
| 54 | { |
| 55 | int space = head - (tail + I915_RING_FREE_SPACE); |
| 56 | if (space < 0) |
| 57 | space += size; |
| 58 | return space; |
| 59 | } |
| 60 | |
| 61 | int intel_ring_space(struct intel_ringbuffer *ringbuf) |
| 62 | { |
| 63 | return __intel_ring_space(ringbuf->head & HEAD_ADDR, |
| 64 | ringbuf->tail, ringbuf->size); |
| 65 | } |
| 66 | |
| 67 | bool intel_ring_stopped(struct intel_engine_cs *ring) |
| 68 | { |
| 69 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 70 | return dev_priv->gpu_error.stop_rings & intel_ring_flag(ring); |
| 71 | } |
| 72 | |
| 73 | void __intel_ring_advance(struct intel_engine_cs *ring) |
| 74 | { |
| 75 | struct intel_ringbuffer *ringbuf = ring->buffer; |
| 76 | ringbuf->tail &= ringbuf->size - 1; |
| 77 | if (intel_ring_stopped(ring)) |
| 78 | return; |
| 79 | ring->write_tail(ring, ringbuf->tail); |
| 80 | } |
| 81 | |
| 82 | static int |
| 83 | gen2_render_ring_flush(struct intel_engine_cs *ring, |
| 84 | u32 invalidate_domains, |
| 85 | u32 flush_domains) |
| 86 | { |
| 87 | u32 cmd; |
| 88 | int ret; |
| 89 | |
| 90 | cmd = MI_FLUSH; |
| 91 | if (((invalidate_domains|flush_domains) & I915_GEM_DOMAIN_RENDER) == 0) |
| 92 | cmd |= MI_NO_WRITE_FLUSH; |
| 93 | |
| 94 | if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER) |
| 95 | cmd |= MI_READ_FLUSH; |
| 96 | |
| 97 | ret = intel_ring_begin(ring, 2); |
| 98 | if (ret) |
| 99 | return ret; |
| 100 | |
| 101 | intel_ring_emit(ring, cmd); |
| 102 | intel_ring_emit(ring, MI_NOOP); |
| 103 | intel_ring_advance(ring); |
| 104 | |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | static int |
| 109 | gen4_render_ring_flush(struct intel_engine_cs *ring, |
| 110 | u32 invalidate_domains, |
| 111 | u32 flush_domains) |
| 112 | { |
| 113 | struct drm_device *dev = ring->dev; |
| 114 | u32 cmd; |
| 115 | int ret; |
| 116 | |
| 117 | /* |
| 118 | * read/write caches: |
| 119 | * |
| 120 | * I915_GEM_DOMAIN_RENDER is always invalidated, but is |
| 121 | * only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is |
| 122 | * also flushed at 2d versus 3d pipeline switches. |
| 123 | * |
| 124 | * read-only caches: |
| 125 | * |
| 126 | * I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if |
| 127 | * MI_READ_FLUSH is set, and is always flushed on 965. |
| 128 | * |
| 129 | * I915_GEM_DOMAIN_COMMAND may not exist? |
| 130 | * |
| 131 | * I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is |
| 132 | * invalidated when MI_EXE_FLUSH is set. |
| 133 | * |
| 134 | * I915_GEM_DOMAIN_VERTEX, which exists on 965, is |
| 135 | * invalidated with every MI_FLUSH. |
| 136 | * |
| 137 | * TLBs: |
| 138 | * |
| 139 | * On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND |
| 140 | * and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and |
| 141 | * I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER |
| 142 | * are flushed at any MI_FLUSH. |
| 143 | */ |
| 144 | |
| 145 | cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; |
| 146 | if ((invalidate_domains|flush_domains) & I915_GEM_DOMAIN_RENDER) |
| 147 | cmd &= ~MI_NO_WRITE_FLUSH; |
| 148 | if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION) |
| 149 | cmd |= MI_EXE_FLUSH; |
| 150 | |
| 151 | if (invalidate_domains & I915_GEM_DOMAIN_COMMAND && |
| 152 | (IS_G4X(dev) || IS_GEN5(dev))) |
| 153 | cmd |= MI_INVALIDATE_ISP; |
| 154 | |
| 155 | ret = intel_ring_begin(ring, 2); |
| 156 | if (ret) |
| 157 | return ret; |
| 158 | |
| 159 | intel_ring_emit(ring, cmd); |
| 160 | intel_ring_emit(ring, MI_NOOP); |
| 161 | intel_ring_advance(ring); |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * Emits a PIPE_CONTROL with a non-zero post-sync operation, for |
| 168 | * implementing two workarounds on gen6. From section 1.4.7.1 |
| 169 | * "PIPE_CONTROL" of the Sandy Bridge PRM volume 2 part 1: |
| 170 | * |
| 171 | * [DevSNB-C+{W/A}] Before any depth stall flush (including those |
| 172 | * produced by non-pipelined state commands), software needs to first |
| 173 | * send a PIPE_CONTROL with no bits set except Post-Sync Operation != |
| 174 | * 0. |
| 175 | * |
| 176 | * [Dev-SNB{W/A}]: Before a PIPE_CONTROL with Write Cache Flush Enable |
| 177 | * =1, a PIPE_CONTROL with any non-zero post-sync-op is required. |
| 178 | * |
| 179 | * And the workaround for these two requires this workaround first: |
| 180 | * |
| 181 | * [Dev-SNB{W/A}]: Pipe-control with CS-stall bit set must be sent |
| 182 | * BEFORE the pipe-control with a post-sync op and no write-cache |
| 183 | * flushes. |
| 184 | * |
| 185 | * And this last workaround is tricky because of the requirements on |
| 186 | * that bit. From section 1.4.7.2.3 "Stall" of the Sandy Bridge PRM |
| 187 | * volume 2 part 1: |
| 188 | * |
| 189 | * "1 of the following must also be set: |
| 190 | * - Render Target Cache Flush Enable ([12] of DW1) |
| 191 | * - Depth Cache Flush Enable ([0] of DW1) |
| 192 | * - Stall at Pixel Scoreboard ([1] of DW1) |
| 193 | * - Depth Stall ([13] of DW1) |
| 194 | * - Post-Sync Operation ([13] of DW1) |
| 195 | * - Notify Enable ([8] of DW1)" |
| 196 | * |
| 197 | * The cache flushes require the workaround flush that triggered this |
| 198 | * one, so we can't use it. Depth stall would trigger the same. |
| 199 | * Post-sync nonzero is what triggered this second workaround, so we |
| 200 | * can't use that one either. Notify enable is IRQs, which aren't |
| 201 | * really our business. That leaves only stall at scoreboard. |
| 202 | */ |
| 203 | static int |
| 204 | intel_emit_post_sync_nonzero_flush(struct intel_engine_cs *ring) |
| 205 | { |
| 206 | u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES; |
| 207 | int ret; |
| 208 | |
| 209 | |
| 210 | ret = intel_ring_begin(ring, 6); |
| 211 | if (ret) |
| 212 | return ret; |
| 213 | |
| 214 | intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(5)); |
| 215 | intel_ring_emit(ring, PIPE_CONTROL_CS_STALL | |
| 216 | PIPE_CONTROL_STALL_AT_SCOREBOARD); |
| 217 | intel_ring_emit(ring, scratch_addr | PIPE_CONTROL_GLOBAL_GTT); /* address */ |
| 218 | intel_ring_emit(ring, 0); /* low dword */ |
| 219 | intel_ring_emit(ring, 0); /* high dword */ |
| 220 | intel_ring_emit(ring, MI_NOOP); |
| 221 | intel_ring_advance(ring); |
| 222 | |
| 223 | ret = intel_ring_begin(ring, 6); |
| 224 | if (ret) |
| 225 | return ret; |
| 226 | |
| 227 | intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(5)); |
| 228 | intel_ring_emit(ring, PIPE_CONTROL_QW_WRITE); |
| 229 | intel_ring_emit(ring, scratch_addr | PIPE_CONTROL_GLOBAL_GTT); /* address */ |
| 230 | intel_ring_emit(ring, 0); |
| 231 | intel_ring_emit(ring, 0); |
| 232 | intel_ring_emit(ring, MI_NOOP); |
| 233 | intel_ring_advance(ring); |
| 234 | |
| 235 | return 0; |
| 236 | } |
| 237 | |
| 238 | static int |
| 239 | gen6_render_ring_flush(struct intel_engine_cs *ring, |
| 240 | u32 invalidate_domains, u32 flush_domains) |
| 241 | { |
| 242 | u32 flags = 0; |
| 243 | u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES; |
| 244 | int ret; |
| 245 | |
| 246 | /* Force SNB workarounds for PIPE_CONTROL flushes */ |
| 247 | ret = intel_emit_post_sync_nonzero_flush(ring); |
| 248 | if (ret) |
| 249 | return ret; |
| 250 | |
| 251 | /* Just flush everything. Experiments have shown that reducing the |
| 252 | * number of bits based on the write domains has little performance |
| 253 | * impact. |
| 254 | */ |
| 255 | if (flush_domains) { |
| 256 | flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; |
| 257 | flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; |
| 258 | /* |
| 259 | * Ensure that any following seqno writes only happen |
| 260 | * when the render cache is indeed flushed. |
| 261 | */ |
| 262 | flags |= PIPE_CONTROL_CS_STALL; |
| 263 | } |
| 264 | if (invalidate_domains) { |
| 265 | flags |= PIPE_CONTROL_TLB_INVALIDATE; |
| 266 | flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE; |
| 267 | flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE; |
| 268 | flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE; |
| 269 | flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE; |
| 270 | flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE; |
| 271 | /* |
| 272 | * TLB invalidate requires a post-sync write. |
| 273 | */ |
| 274 | flags |= PIPE_CONTROL_QW_WRITE | PIPE_CONTROL_CS_STALL; |
| 275 | } |
| 276 | |
| 277 | ret = intel_ring_begin(ring, 4); |
| 278 | if (ret) |
| 279 | return ret; |
| 280 | |
| 281 | intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4)); |
| 282 | intel_ring_emit(ring, flags); |
| 283 | intel_ring_emit(ring, scratch_addr | PIPE_CONTROL_GLOBAL_GTT); |
| 284 | intel_ring_emit(ring, 0); |
| 285 | intel_ring_advance(ring); |
| 286 | |
| 287 | return 0; |
| 288 | } |
| 289 | |
| 290 | static int |
| 291 | gen7_render_ring_cs_stall_wa(struct intel_engine_cs *ring) |
| 292 | { |
| 293 | int ret; |
| 294 | |
| 295 | ret = intel_ring_begin(ring, 4); |
| 296 | if (ret) |
| 297 | return ret; |
| 298 | |
| 299 | intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4)); |
| 300 | intel_ring_emit(ring, PIPE_CONTROL_CS_STALL | |
| 301 | PIPE_CONTROL_STALL_AT_SCOREBOARD); |
| 302 | intel_ring_emit(ring, 0); |
| 303 | intel_ring_emit(ring, 0); |
| 304 | intel_ring_advance(ring); |
| 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static int gen7_ring_fbc_flush(struct intel_engine_cs *ring, u32 value) |
| 310 | { |
| 311 | int ret; |
| 312 | |
| 313 | if (!ring->fbc_dirty) |
| 314 | return 0; |
| 315 | |
| 316 | ret = intel_ring_begin(ring, 6); |
| 317 | if (ret) |
| 318 | return ret; |
| 319 | /* WaFbcNukeOn3DBlt:ivb/hsw */ |
| 320 | intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1)); |
| 321 | intel_ring_emit(ring, MSG_FBC_REND_STATE); |
| 322 | intel_ring_emit(ring, value); |
| 323 | intel_ring_emit(ring, MI_STORE_REGISTER_MEM(1) | MI_SRM_LRM_GLOBAL_GTT); |
| 324 | intel_ring_emit(ring, MSG_FBC_REND_STATE); |
| 325 | intel_ring_emit(ring, ring->scratch.gtt_offset + 256); |
| 326 | intel_ring_advance(ring); |
| 327 | |
| 328 | ring->fbc_dirty = false; |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | static int |
| 333 | gen7_render_ring_flush(struct intel_engine_cs *ring, |
| 334 | u32 invalidate_domains, u32 flush_domains) |
| 335 | { |
| 336 | u32 flags = 0; |
| 337 | u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES; |
| 338 | int ret; |
| 339 | |
| 340 | /* |
| 341 | * Ensure that any following seqno writes only happen when the render |
| 342 | * cache is indeed flushed. |
| 343 | * |
| 344 | * Workaround: 4th PIPE_CONTROL command (except the ones with only |
| 345 | * read-cache invalidate bits set) must have the CS_STALL bit set. We |
| 346 | * don't try to be clever and just set it unconditionally. |
| 347 | */ |
| 348 | flags |= PIPE_CONTROL_CS_STALL; |
| 349 | |
| 350 | /* Just flush everything. Experiments have shown that reducing the |
| 351 | * number of bits based on the write domains has little performance |
| 352 | * impact. |
| 353 | */ |
| 354 | if (flush_domains) { |
| 355 | flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; |
| 356 | flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; |
| 357 | } |
| 358 | if (invalidate_domains) { |
| 359 | flags |= PIPE_CONTROL_TLB_INVALIDATE; |
| 360 | flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE; |
| 361 | flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE; |
| 362 | flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE; |
| 363 | flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE; |
| 364 | flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE; |
| 365 | /* |
| 366 | * TLB invalidate requires a post-sync write. |
| 367 | */ |
| 368 | flags |= PIPE_CONTROL_QW_WRITE; |
| 369 | flags |= PIPE_CONTROL_GLOBAL_GTT_IVB; |
| 370 | |
| 371 | /* Workaround: we must issue a pipe_control with CS-stall bit |
| 372 | * set before a pipe_control command that has the state cache |
| 373 | * invalidate bit set. */ |
| 374 | gen7_render_ring_cs_stall_wa(ring); |
| 375 | } |
| 376 | |
| 377 | ret = intel_ring_begin(ring, 4); |
| 378 | if (ret) |
| 379 | return ret; |
| 380 | |
| 381 | intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4)); |
| 382 | intel_ring_emit(ring, flags); |
| 383 | intel_ring_emit(ring, scratch_addr); |
| 384 | intel_ring_emit(ring, 0); |
| 385 | intel_ring_advance(ring); |
| 386 | |
| 387 | if (!invalidate_domains && flush_domains) |
| 388 | return gen7_ring_fbc_flush(ring, FBC_REND_NUKE); |
| 389 | |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | static int |
| 394 | gen8_emit_pipe_control(struct intel_engine_cs *ring, |
| 395 | u32 flags, u32 scratch_addr) |
| 396 | { |
| 397 | int ret; |
| 398 | |
| 399 | ret = intel_ring_begin(ring, 6); |
| 400 | if (ret) |
| 401 | return ret; |
| 402 | |
| 403 | intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(6)); |
| 404 | intel_ring_emit(ring, flags); |
| 405 | intel_ring_emit(ring, scratch_addr); |
| 406 | intel_ring_emit(ring, 0); |
| 407 | intel_ring_emit(ring, 0); |
| 408 | intel_ring_emit(ring, 0); |
| 409 | intel_ring_advance(ring); |
| 410 | |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | static int |
| 415 | gen8_render_ring_flush(struct intel_engine_cs *ring, |
| 416 | u32 invalidate_domains, u32 flush_domains) |
| 417 | { |
| 418 | u32 flags = 0; |
| 419 | u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES; |
| 420 | int ret; |
| 421 | |
| 422 | flags |= PIPE_CONTROL_CS_STALL; |
| 423 | |
| 424 | if (flush_domains) { |
| 425 | flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; |
| 426 | flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; |
| 427 | } |
| 428 | if (invalidate_domains) { |
| 429 | flags |= PIPE_CONTROL_TLB_INVALIDATE; |
| 430 | flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE; |
| 431 | flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE; |
| 432 | flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE; |
| 433 | flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE; |
| 434 | flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE; |
| 435 | flags |= PIPE_CONTROL_QW_WRITE; |
| 436 | flags |= PIPE_CONTROL_GLOBAL_GTT_IVB; |
| 437 | |
| 438 | /* WaCsStallBeforeStateCacheInvalidate:bdw,chv */ |
| 439 | ret = gen8_emit_pipe_control(ring, |
| 440 | PIPE_CONTROL_CS_STALL | |
| 441 | PIPE_CONTROL_STALL_AT_SCOREBOARD, |
| 442 | 0); |
| 443 | if (ret) |
| 444 | return ret; |
| 445 | } |
| 446 | |
| 447 | ret = gen8_emit_pipe_control(ring, flags, scratch_addr); |
| 448 | if (ret) |
| 449 | return ret; |
| 450 | |
| 451 | if (!invalidate_domains && flush_domains) |
| 452 | return gen7_ring_fbc_flush(ring, FBC_REND_NUKE); |
| 453 | |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | static void ring_write_tail(struct intel_engine_cs *ring, |
| 458 | u32 value) |
| 459 | { |
| 460 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 461 | I915_WRITE_TAIL(ring, value); |
| 462 | } |
| 463 | |
| 464 | u64 intel_ring_get_active_head(struct intel_engine_cs *ring) |
| 465 | { |
| 466 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 467 | u64 acthd; |
| 468 | |
| 469 | if (INTEL_INFO(ring->dev)->gen >= 8) |
| 470 | acthd = I915_READ64_2x32(RING_ACTHD(ring->mmio_base), |
| 471 | RING_ACTHD_UDW(ring->mmio_base)); |
| 472 | else if (INTEL_INFO(ring->dev)->gen >= 4) |
| 473 | acthd = I915_READ(RING_ACTHD(ring->mmio_base)); |
| 474 | else |
| 475 | acthd = I915_READ(ACTHD); |
| 476 | |
| 477 | return acthd; |
| 478 | } |
| 479 | |
| 480 | static void ring_setup_phys_status_page(struct intel_engine_cs *ring) |
| 481 | { |
| 482 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 483 | u32 addr; |
| 484 | |
| 485 | addr = dev_priv->status_page_dmah->busaddr; |
| 486 | if (INTEL_INFO(ring->dev)->gen >= 4) |
| 487 | addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0; |
| 488 | I915_WRITE(HWS_PGA, addr); |
| 489 | } |
| 490 | |
| 491 | static bool stop_ring(struct intel_engine_cs *ring) |
| 492 | { |
| 493 | struct drm_i915_private *dev_priv = to_i915(ring->dev); |
| 494 | |
| 495 | if (!IS_GEN2(ring->dev)) { |
| 496 | I915_WRITE_MODE(ring, _MASKED_BIT_ENABLE(STOP_RING)); |
| 497 | if (wait_for((I915_READ_MODE(ring) & MODE_IDLE) != 0, 1000)) { |
| 498 | DRM_ERROR("%s : timed out trying to stop ring\n", ring->name); |
| 499 | /* Sometimes we observe that the idle flag is not |
| 500 | * set even though the ring is empty. So double |
| 501 | * check before giving up. |
| 502 | */ |
| 503 | if (I915_READ_HEAD(ring) != I915_READ_TAIL(ring)) |
| 504 | return false; |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | I915_WRITE_CTL(ring, 0); |
| 509 | I915_WRITE_HEAD(ring, 0); |
| 510 | ring->write_tail(ring, 0); |
| 511 | |
| 512 | if (!IS_GEN2(ring->dev)) { |
| 513 | (void)I915_READ_CTL(ring); |
| 514 | I915_WRITE_MODE(ring, _MASKED_BIT_DISABLE(STOP_RING)); |
| 515 | } |
| 516 | |
| 517 | return (I915_READ_HEAD(ring) & HEAD_ADDR) == 0; |
| 518 | } |
| 519 | |
| 520 | static int init_ring_common(struct intel_engine_cs *ring) |
| 521 | { |
| 522 | struct drm_device *dev = ring->dev; |
| 523 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 524 | struct intel_ringbuffer *ringbuf = ring->buffer; |
| 525 | struct drm_i915_gem_object *obj = ringbuf->obj; |
| 526 | int ret = 0; |
| 527 | |
| 528 | gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL); |
| 529 | |
| 530 | if (!stop_ring(ring)) { |
| 531 | /* G45 ring initialization often fails to reset head to zero */ |
| 532 | DRM_DEBUG_KMS("%s head not reset to zero " |
| 533 | "ctl %08x head %08x tail %08x start %08x\n", |
| 534 | ring->name, |
| 535 | I915_READ_CTL(ring), |
| 536 | I915_READ_HEAD(ring), |
| 537 | I915_READ_TAIL(ring), |
| 538 | I915_READ_START(ring)); |
| 539 | |
| 540 | if (!stop_ring(ring)) { |
| 541 | DRM_ERROR("failed to set %s head to zero " |
| 542 | "ctl %08x head %08x tail %08x start %08x\n", |
| 543 | ring->name, |
| 544 | I915_READ_CTL(ring), |
| 545 | I915_READ_HEAD(ring), |
| 546 | I915_READ_TAIL(ring), |
| 547 | I915_READ_START(ring)); |
| 548 | ret = -EIO; |
| 549 | goto out; |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | if (I915_NEED_GFX_HWS(dev)) |
| 554 | intel_ring_setup_status_page(ring); |
| 555 | else |
| 556 | ring_setup_phys_status_page(ring); |
| 557 | |
| 558 | /* Enforce ordering by reading HEAD register back */ |
| 559 | I915_READ_HEAD(ring); |
| 560 | |
| 561 | /* Initialize the ring. This must happen _after_ we've cleared the ring |
| 562 | * registers with the above sequence (the readback of the HEAD registers |
| 563 | * also enforces ordering), otherwise the hw might lose the new ring |
| 564 | * register values. */ |
| 565 | I915_WRITE_START(ring, i915_gem_obj_ggtt_offset(obj)); |
| 566 | |
| 567 | /* WaClearRingBufHeadRegAtInit:ctg,elk */ |
| 568 | if (I915_READ_HEAD(ring)) |
| 569 | DRM_DEBUG("%s initialization failed [head=%08x], fudging\n", |
| 570 | ring->name, I915_READ_HEAD(ring)); |
| 571 | I915_WRITE_HEAD(ring, 0); |
| 572 | (void)I915_READ_HEAD(ring); |
| 573 | |
| 574 | I915_WRITE_CTL(ring, |
| 575 | ((ringbuf->size - PAGE_SIZE) & RING_NR_PAGES) |
| 576 | | RING_VALID); |
| 577 | |
| 578 | /* If the head is still not zero, the ring is dead */ |
| 579 | if (wait_for((I915_READ_CTL(ring) & RING_VALID) != 0 && |
| 580 | I915_READ_START(ring) == i915_gem_obj_ggtt_offset(obj) && |
| 581 | (I915_READ_HEAD(ring) & HEAD_ADDR) == 0, 50)) { |
| 582 | DRM_ERROR("%s initialization failed " |
| 583 | "ctl %08x (valid? %d) head %08x tail %08x start %08x [expected %08lx]\n", |
| 584 | ring->name, |
| 585 | I915_READ_CTL(ring), I915_READ_CTL(ring) & RING_VALID, |
| 586 | I915_READ_HEAD(ring), I915_READ_TAIL(ring), |
| 587 | I915_READ_START(ring), (unsigned long)i915_gem_obj_ggtt_offset(obj)); |
| 588 | ret = -EIO; |
| 589 | goto out; |
| 590 | } |
| 591 | |
| 592 | ringbuf->head = I915_READ_HEAD(ring); |
| 593 | ringbuf->tail = I915_READ_TAIL(ring) & TAIL_ADDR; |
| 594 | ringbuf->space = intel_ring_space(ringbuf); |
| 595 | ringbuf->last_retired_head = -1; |
| 596 | |
| 597 | memset(&ring->hangcheck, 0, sizeof(ring->hangcheck)); |
| 598 | |
| 599 | out: |
| 600 | gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL); |
| 601 | |
| 602 | return ret; |
| 603 | } |
| 604 | |
| 605 | void |
| 606 | intel_fini_pipe_control(struct intel_engine_cs *ring) |
| 607 | { |
| 608 | struct drm_device *dev = ring->dev; |
| 609 | |
| 610 | if (ring->scratch.obj == NULL) |
| 611 | return; |
| 612 | |
| 613 | if (INTEL_INFO(dev)->gen >= 5) { |
| 614 | kunmap(sg_page(ring->scratch.obj->pages->sgl)); |
| 615 | i915_gem_object_ggtt_unpin(ring->scratch.obj); |
| 616 | } |
| 617 | |
| 618 | drm_gem_object_unreference(&ring->scratch.obj->base); |
| 619 | ring->scratch.obj = NULL; |
| 620 | } |
| 621 | |
| 622 | int |
| 623 | intel_init_pipe_control(struct intel_engine_cs *ring) |
| 624 | { |
| 625 | int ret; |
| 626 | |
| 627 | if (ring->scratch.obj) |
| 628 | return 0; |
| 629 | |
| 630 | ring->scratch.obj = i915_gem_alloc_object(ring->dev, 4096); |
| 631 | if (ring->scratch.obj == NULL) { |
| 632 | DRM_ERROR("Failed to allocate seqno page\n"); |
| 633 | ret = -ENOMEM; |
| 634 | goto err; |
| 635 | } |
| 636 | |
| 637 | ret = i915_gem_object_set_cache_level(ring->scratch.obj, I915_CACHE_LLC); |
| 638 | if (ret) |
| 639 | goto err_unref; |
| 640 | |
| 641 | ret = i915_gem_obj_ggtt_pin(ring->scratch.obj, 4096, 0); |
| 642 | if (ret) |
| 643 | goto err_unref; |
| 644 | |
| 645 | ring->scratch.gtt_offset = i915_gem_obj_ggtt_offset(ring->scratch.obj); |
| 646 | ring->scratch.cpu_page = kmap(sg_page(ring->scratch.obj->pages->sgl)); |
| 647 | if (ring->scratch.cpu_page == NULL) { |
| 648 | ret = -ENOMEM; |
| 649 | goto err_unpin; |
| 650 | } |
| 651 | |
| 652 | DRM_DEBUG_DRIVER("%s pipe control offset: 0x%08x\n", |
| 653 | ring->name, ring->scratch.gtt_offset); |
| 654 | return 0; |
| 655 | |
| 656 | err_unpin: |
| 657 | i915_gem_object_ggtt_unpin(ring->scratch.obj); |
| 658 | err_unref: |
| 659 | drm_gem_object_unreference(&ring->scratch.obj->base); |
| 660 | err: |
| 661 | return ret; |
| 662 | } |
| 663 | |
| 664 | static int intel_ring_workarounds_emit(struct intel_engine_cs *ring, |
| 665 | struct intel_context *ctx) |
| 666 | { |
| 667 | int ret, i; |
| 668 | struct drm_device *dev = ring->dev; |
| 669 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 670 | struct i915_workarounds *w = &dev_priv->workarounds; |
| 671 | |
| 672 | if (WARN_ON(w->count == 0)) |
| 673 | return 0; |
| 674 | |
| 675 | ring->gpu_caches_dirty = true; |
| 676 | ret = intel_ring_flush_all_caches(ring); |
| 677 | if (ret) |
| 678 | return ret; |
| 679 | |
| 680 | ret = intel_ring_begin(ring, (w->count * 2 + 2)); |
| 681 | if (ret) |
| 682 | return ret; |
| 683 | |
| 684 | intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(w->count)); |
| 685 | for (i = 0; i < w->count; i++) { |
| 686 | intel_ring_emit(ring, w->reg[i].addr); |
| 687 | intel_ring_emit(ring, w->reg[i].value); |
| 688 | } |
| 689 | intel_ring_emit(ring, MI_NOOP); |
| 690 | |
| 691 | intel_ring_advance(ring); |
| 692 | |
| 693 | ring->gpu_caches_dirty = true; |
| 694 | ret = intel_ring_flush_all_caches(ring); |
| 695 | if (ret) |
| 696 | return ret; |
| 697 | |
| 698 | DRM_DEBUG_DRIVER("Number of Workarounds emitted: %d\n", w->count); |
| 699 | |
| 700 | return 0; |
| 701 | } |
| 702 | |
| 703 | static int wa_add(struct drm_i915_private *dev_priv, |
| 704 | const u32 addr, const u32 val, const u32 mask) |
| 705 | { |
| 706 | const u32 idx = dev_priv->workarounds.count; |
| 707 | |
| 708 | if (WARN_ON(idx >= I915_MAX_WA_REGS)) |
| 709 | return -ENOSPC; |
| 710 | |
| 711 | dev_priv->workarounds.reg[idx].addr = addr; |
| 712 | dev_priv->workarounds.reg[idx].value = val; |
| 713 | dev_priv->workarounds.reg[idx].mask = mask; |
| 714 | |
| 715 | dev_priv->workarounds.count++; |
| 716 | |
| 717 | return 0; |
| 718 | } |
| 719 | |
| 720 | #define WA_REG(addr, val, mask) { \ |
| 721 | const int r = wa_add(dev_priv, (addr), (val), (mask)); \ |
| 722 | if (r) \ |
| 723 | return r; \ |
| 724 | } |
| 725 | |
| 726 | #define WA_SET_BIT_MASKED(addr, mask) \ |
| 727 | WA_REG(addr, _MASKED_BIT_ENABLE(mask), (mask) & 0xffff) |
| 728 | |
| 729 | #define WA_CLR_BIT_MASKED(addr, mask) \ |
| 730 | WA_REG(addr, _MASKED_BIT_DISABLE(mask), (mask) & 0xffff) |
| 731 | |
| 732 | #define WA_SET_BIT(addr, mask) WA_REG(addr, I915_READ(addr) | (mask), mask) |
| 733 | #define WA_CLR_BIT(addr, mask) WA_REG(addr, I915_READ(addr) & ~(mask), mask) |
| 734 | |
| 735 | #define WA_WRITE(addr, val) WA_REG(addr, val, 0xffffffff) |
| 736 | |
| 737 | static int bdw_init_workarounds(struct intel_engine_cs *ring) |
| 738 | { |
| 739 | struct drm_device *dev = ring->dev; |
| 740 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 741 | |
| 742 | /* WaDisablePartialInstShootdown:bdw */ |
| 743 | /* WaDisableThreadStallDopClockGating:bdw (pre-production) */ |
| 744 | WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, |
| 745 | PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE | |
| 746 | STALL_DOP_GATING_DISABLE); |
| 747 | |
| 748 | /* WaDisableDopClockGating:bdw */ |
| 749 | WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, |
| 750 | DOP_CLOCK_GATING_DISABLE); |
| 751 | |
| 752 | WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, |
| 753 | GEN8_SAMPLER_POWER_BYPASS_DIS); |
| 754 | |
| 755 | /* Use Force Non-Coherent whenever executing a 3D context. This is a |
| 756 | * workaround for for a possible hang in the unlikely event a TLB |
| 757 | * invalidation occurs during a PSD flush. |
| 758 | */ |
| 759 | /* WaDisableFenceDestinationToSLM:bdw (GT3 pre-production) */ |
| 760 | WA_SET_BIT_MASKED(HDC_CHICKEN0, |
| 761 | HDC_FORCE_NON_COHERENT | |
| 762 | (IS_BDW_GT3(dev) ? HDC_FENCE_DEST_SLM_DISABLE : 0)); |
| 763 | |
| 764 | /* Wa4x4STCOptimizationDisable:bdw */ |
| 765 | WA_SET_BIT_MASKED(CACHE_MODE_1, |
| 766 | GEN8_4x4_STC_OPTIMIZATION_DISABLE); |
| 767 | |
| 768 | /* |
| 769 | * BSpec recommends 8x4 when MSAA is used, |
| 770 | * however in practice 16x4 seems fastest. |
| 771 | * |
| 772 | * Note that PS/WM thread counts depend on the WIZ hashing |
| 773 | * disable bit, which we don't touch here, but it's good |
| 774 | * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM). |
| 775 | */ |
| 776 | WA_SET_BIT_MASKED(GEN7_GT_MODE, |
| 777 | GEN6_WIZ_HASHING_MASK | GEN6_WIZ_HASHING_16x4); |
| 778 | |
| 779 | return 0; |
| 780 | } |
| 781 | |
| 782 | static int chv_init_workarounds(struct intel_engine_cs *ring) |
| 783 | { |
| 784 | struct drm_device *dev = ring->dev; |
| 785 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 786 | |
| 787 | /* WaDisablePartialInstShootdown:chv */ |
| 788 | /* WaDisableThreadStallDopClockGating:chv */ |
| 789 | WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, |
| 790 | PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE | |
| 791 | STALL_DOP_GATING_DISABLE); |
| 792 | |
| 793 | /* Use Force Non-Coherent whenever executing a 3D context. This is a |
| 794 | * workaround for a possible hang in the unlikely event a TLB |
| 795 | * invalidation occurs during a PSD flush. |
| 796 | */ |
| 797 | /* WaForceEnableNonCoherent:chv */ |
| 798 | /* WaHdcDisableFetchWhenMasked:chv */ |
| 799 | WA_SET_BIT_MASKED(HDC_CHICKEN0, |
| 800 | HDC_FORCE_NON_COHERENT | |
| 801 | HDC_DONOT_FETCH_MEM_WHEN_MASKED); |
| 802 | |
| 803 | return 0; |
| 804 | } |
| 805 | |
| 806 | int init_workarounds_ring(struct intel_engine_cs *ring) |
| 807 | { |
| 808 | struct drm_device *dev = ring->dev; |
| 809 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 810 | |
| 811 | WARN_ON(ring->id != RCS); |
| 812 | |
| 813 | dev_priv->workarounds.count = 0; |
| 814 | |
| 815 | if (IS_BROADWELL(dev)) |
| 816 | return bdw_init_workarounds(ring); |
| 817 | |
| 818 | if (IS_CHERRYVIEW(dev)) |
| 819 | return chv_init_workarounds(ring); |
| 820 | |
| 821 | return 0; |
| 822 | } |
| 823 | |
| 824 | static int init_render_ring(struct intel_engine_cs *ring) |
| 825 | { |
| 826 | struct drm_device *dev = ring->dev; |
| 827 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 828 | int ret = init_ring_common(ring); |
| 829 | if (ret) |
| 830 | return ret; |
| 831 | |
| 832 | /* WaTimedSingleVertexDispatch:cl,bw,ctg,elk,ilk,snb */ |
| 833 | if (INTEL_INFO(dev)->gen >= 4 && INTEL_INFO(dev)->gen < 7) |
| 834 | I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(VS_TIMER_DISPATCH)); |
| 835 | |
| 836 | /* We need to disable the AsyncFlip performance optimisations in order |
| 837 | * to use MI_WAIT_FOR_EVENT within the CS. It should already be |
| 838 | * programmed to '1' on all products. |
| 839 | * |
| 840 | * WaDisableAsyncFlipPerfMode:snb,ivb,hsw,vlv,bdw,chv |
| 841 | */ |
| 842 | if (INTEL_INFO(dev)->gen >= 6 && INTEL_INFO(dev)->gen < 9) |
| 843 | I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(ASYNC_FLIP_PERF_DISABLE)); |
| 844 | |
| 845 | /* Required for the hardware to program scanline values for waiting */ |
| 846 | /* WaEnableFlushTlbInvalidationMode:snb */ |
| 847 | if (INTEL_INFO(dev)->gen == 6) |
| 848 | I915_WRITE(GFX_MODE, |
| 849 | _MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT)); |
| 850 | |
| 851 | /* WaBCSVCSTlbInvalidationMode:ivb,vlv,hsw */ |
| 852 | if (IS_GEN7(dev)) |
| 853 | I915_WRITE(GFX_MODE_GEN7, |
| 854 | _MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT) | |
| 855 | _MASKED_BIT_ENABLE(GFX_REPLAY_MODE)); |
| 856 | |
| 857 | if (INTEL_INFO(dev)->gen >= 5) { |
| 858 | ret = intel_init_pipe_control(ring); |
| 859 | if (ret) |
| 860 | return ret; |
| 861 | } |
| 862 | |
| 863 | if (IS_GEN6(dev)) { |
| 864 | /* From the Sandybridge PRM, volume 1 part 3, page 24: |
| 865 | * "If this bit is set, STCunit will have LRA as replacement |
| 866 | * policy. [...] This bit must be reset. LRA replacement |
| 867 | * policy is not supported." |
| 868 | */ |
| 869 | I915_WRITE(CACHE_MODE_0, |
| 870 | _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB)); |
| 871 | } |
| 872 | |
| 873 | if (INTEL_INFO(dev)->gen >= 6) |
| 874 | I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING)); |
| 875 | |
| 876 | if (HAS_L3_DPF(dev)) |
| 877 | I915_WRITE_IMR(ring, ~GT_PARITY_ERROR(dev)); |
| 878 | |
| 879 | return init_workarounds_ring(ring); |
| 880 | } |
| 881 | |
| 882 | static void render_ring_cleanup(struct intel_engine_cs *ring) |
| 883 | { |
| 884 | struct drm_device *dev = ring->dev; |
| 885 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 886 | |
| 887 | if (dev_priv->semaphore_obj) { |
| 888 | i915_gem_object_ggtt_unpin(dev_priv->semaphore_obj); |
| 889 | drm_gem_object_unreference(&dev_priv->semaphore_obj->base); |
| 890 | dev_priv->semaphore_obj = NULL; |
| 891 | } |
| 892 | |
| 893 | intel_fini_pipe_control(ring); |
| 894 | } |
| 895 | |
| 896 | static int gen8_rcs_signal(struct intel_engine_cs *signaller, |
| 897 | unsigned int num_dwords) |
| 898 | { |
| 899 | #define MBOX_UPDATE_DWORDS 8 |
| 900 | struct drm_device *dev = signaller->dev; |
| 901 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 902 | struct intel_engine_cs *waiter; |
| 903 | int i, ret, num_rings; |
| 904 | |
| 905 | num_rings = hweight32(INTEL_INFO(dev)->ring_mask); |
| 906 | num_dwords += (num_rings-1) * MBOX_UPDATE_DWORDS; |
| 907 | #undef MBOX_UPDATE_DWORDS |
| 908 | |
| 909 | ret = intel_ring_begin(signaller, num_dwords); |
| 910 | if (ret) |
| 911 | return ret; |
| 912 | |
| 913 | for_each_ring(waiter, dev_priv, i) { |
| 914 | u32 seqno; |
| 915 | u64 gtt_offset = signaller->semaphore.signal_ggtt[i]; |
| 916 | if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID) |
| 917 | continue; |
| 918 | |
| 919 | seqno = i915_gem_request_get_seqno( |
| 920 | signaller->outstanding_lazy_request); |
| 921 | intel_ring_emit(signaller, GFX_OP_PIPE_CONTROL(6)); |
| 922 | intel_ring_emit(signaller, PIPE_CONTROL_GLOBAL_GTT_IVB | |
| 923 | PIPE_CONTROL_QW_WRITE | |
| 924 | PIPE_CONTROL_FLUSH_ENABLE); |
| 925 | intel_ring_emit(signaller, lower_32_bits(gtt_offset)); |
| 926 | intel_ring_emit(signaller, upper_32_bits(gtt_offset)); |
| 927 | intel_ring_emit(signaller, seqno); |
| 928 | intel_ring_emit(signaller, 0); |
| 929 | intel_ring_emit(signaller, MI_SEMAPHORE_SIGNAL | |
| 930 | MI_SEMAPHORE_TARGET(waiter->id)); |
| 931 | intel_ring_emit(signaller, 0); |
| 932 | } |
| 933 | |
| 934 | return 0; |
| 935 | } |
| 936 | |
| 937 | static int gen8_xcs_signal(struct intel_engine_cs *signaller, |
| 938 | unsigned int num_dwords) |
| 939 | { |
| 940 | #define MBOX_UPDATE_DWORDS 6 |
| 941 | struct drm_device *dev = signaller->dev; |
| 942 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 943 | struct intel_engine_cs *waiter; |
| 944 | int i, ret, num_rings; |
| 945 | |
| 946 | num_rings = hweight32(INTEL_INFO(dev)->ring_mask); |
| 947 | num_dwords += (num_rings-1) * MBOX_UPDATE_DWORDS; |
| 948 | #undef MBOX_UPDATE_DWORDS |
| 949 | |
| 950 | ret = intel_ring_begin(signaller, num_dwords); |
| 951 | if (ret) |
| 952 | return ret; |
| 953 | |
| 954 | for_each_ring(waiter, dev_priv, i) { |
| 955 | u32 seqno; |
| 956 | u64 gtt_offset = signaller->semaphore.signal_ggtt[i]; |
| 957 | if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID) |
| 958 | continue; |
| 959 | |
| 960 | seqno = i915_gem_request_get_seqno( |
| 961 | signaller->outstanding_lazy_request); |
| 962 | intel_ring_emit(signaller, (MI_FLUSH_DW + 1) | |
| 963 | MI_FLUSH_DW_OP_STOREDW); |
| 964 | intel_ring_emit(signaller, lower_32_bits(gtt_offset) | |
| 965 | MI_FLUSH_DW_USE_GTT); |
| 966 | intel_ring_emit(signaller, upper_32_bits(gtt_offset)); |
| 967 | intel_ring_emit(signaller, seqno); |
| 968 | intel_ring_emit(signaller, MI_SEMAPHORE_SIGNAL | |
| 969 | MI_SEMAPHORE_TARGET(waiter->id)); |
| 970 | intel_ring_emit(signaller, 0); |
| 971 | } |
| 972 | |
| 973 | return 0; |
| 974 | } |
| 975 | |
| 976 | static int gen6_signal(struct intel_engine_cs *signaller, |
| 977 | unsigned int num_dwords) |
| 978 | { |
| 979 | struct drm_device *dev = signaller->dev; |
| 980 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 981 | struct intel_engine_cs *useless; |
| 982 | int i, ret, num_rings; |
| 983 | |
| 984 | #define MBOX_UPDATE_DWORDS 3 |
| 985 | num_rings = hweight32(INTEL_INFO(dev)->ring_mask); |
| 986 | num_dwords += round_up((num_rings-1) * MBOX_UPDATE_DWORDS, 2); |
| 987 | #undef MBOX_UPDATE_DWORDS |
| 988 | |
| 989 | ret = intel_ring_begin(signaller, num_dwords); |
| 990 | if (ret) |
| 991 | return ret; |
| 992 | |
| 993 | for_each_ring(useless, dev_priv, i) { |
| 994 | u32 mbox_reg = signaller->semaphore.mbox.signal[i]; |
| 995 | if (mbox_reg != GEN6_NOSYNC) { |
| 996 | u32 seqno = i915_gem_request_get_seqno( |
| 997 | signaller->outstanding_lazy_request); |
| 998 | intel_ring_emit(signaller, MI_LOAD_REGISTER_IMM(1)); |
| 999 | intel_ring_emit(signaller, mbox_reg); |
| 1000 | intel_ring_emit(signaller, seqno); |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | /* If num_dwords was rounded, make sure the tail pointer is correct */ |
| 1005 | if (num_rings % 2 == 0) |
| 1006 | intel_ring_emit(signaller, MI_NOOP); |
| 1007 | |
| 1008 | return 0; |
| 1009 | } |
| 1010 | |
| 1011 | /** |
| 1012 | * gen6_add_request - Update the semaphore mailbox registers |
| 1013 | * |
| 1014 | * @ring - ring that is adding a request |
| 1015 | * @seqno - return seqno stuck into the ring |
| 1016 | * |
| 1017 | * Update the mailbox registers in the *other* rings with the current seqno. |
| 1018 | * This acts like a signal in the canonical semaphore. |
| 1019 | */ |
| 1020 | static int |
| 1021 | gen6_add_request(struct intel_engine_cs *ring) |
| 1022 | { |
| 1023 | int ret; |
| 1024 | |
| 1025 | if (ring->semaphore.signal) |
| 1026 | ret = ring->semaphore.signal(ring, 4); |
| 1027 | else |
| 1028 | ret = intel_ring_begin(ring, 4); |
| 1029 | |
| 1030 | if (ret) |
| 1031 | return ret; |
| 1032 | |
| 1033 | intel_ring_emit(ring, MI_STORE_DWORD_INDEX); |
| 1034 | intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); |
| 1035 | intel_ring_emit(ring, |
| 1036 | i915_gem_request_get_seqno(ring->outstanding_lazy_request)); |
| 1037 | intel_ring_emit(ring, MI_USER_INTERRUPT); |
| 1038 | __intel_ring_advance(ring); |
| 1039 | |
| 1040 | return 0; |
| 1041 | } |
| 1042 | |
| 1043 | static inline bool i915_gem_has_seqno_wrapped(struct drm_device *dev, |
| 1044 | u32 seqno) |
| 1045 | { |
| 1046 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1047 | return dev_priv->last_seqno < seqno; |
| 1048 | } |
| 1049 | |
| 1050 | /** |
| 1051 | * intel_ring_sync - sync the waiter to the signaller on seqno |
| 1052 | * |
| 1053 | * @waiter - ring that is waiting |
| 1054 | * @signaller - ring which has, or will signal |
| 1055 | * @seqno - seqno which the waiter will block on |
| 1056 | */ |
| 1057 | |
| 1058 | static int |
| 1059 | gen8_ring_sync(struct intel_engine_cs *waiter, |
| 1060 | struct intel_engine_cs *signaller, |
| 1061 | u32 seqno) |
| 1062 | { |
| 1063 | struct drm_i915_private *dev_priv = waiter->dev->dev_private; |
| 1064 | int ret; |
| 1065 | |
| 1066 | ret = intel_ring_begin(waiter, 4); |
| 1067 | if (ret) |
| 1068 | return ret; |
| 1069 | |
| 1070 | intel_ring_emit(waiter, MI_SEMAPHORE_WAIT | |
| 1071 | MI_SEMAPHORE_GLOBAL_GTT | |
| 1072 | MI_SEMAPHORE_POLL | |
| 1073 | MI_SEMAPHORE_SAD_GTE_SDD); |
| 1074 | intel_ring_emit(waiter, seqno); |
| 1075 | intel_ring_emit(waiter, |
| 1076 | lower_32_bits(GEN8_WAIT_OFFSET(waiter, signaller->id))); |
| 1077 | intel_ring_emit(waiter, |
| 1078 | upper_32_bits(GEN8_WAIT_OFFSET(waiter, signaller->id))); |
| 1079 | intel_ring_advance(waiter); |
| 1080 | return 0; |
| 1081 | } |
| 1082 | |
| 1083 | static int |
| 1084 | gen6_ring_sync(struct intel_engine_cs *waiter, |
| 1085 | struct intel_engine_cs *signaller, |
| 1086 | u32 seqno) |
| 1087 | { |
| 1088 | u32 dw1 = MI_SEMAPHORE_MBOX | |
| 1089 | MI_SEMAPHORE_COMPARE | |
| 1090 | MI_SEMAPHORE_REGISTER; |
| 1091 | u32 wait_mbox = signaller->semaphore.mbox.wait[waiter->id]; |
| 1092 | int ret; |
| 1093 | |
| 1094 | /* Throughout all of the GEM code, seqno passed implies our current |
| 1095 | * seqno is >= the last seqno executed. However for hardware the |
| 1096 | * comparison is strictly greater than. |
| 1097 | */ |
| 1098 | seqno -= 1; |
| 1099 | |
| 1100 | WARN_ON(wait_mbox == MI_SEMAPHORE_SYNC_INVALID); |
| 1101 | |
| 1102 | ret = intel_ring_begin(waiter, 4); |
| 1103 | if (ret) |
| 1104 | return ret; |
| 1105 | |
| 1106 | /* If seqno wrap happened, omit the wait with no-ops */ |
| 1107 | if (likely(!i915_gem_has_seqno_wrapped(waiter->dev, seqno))) { |
| 1108 | intel_ring_emit(waiter, dw1 | wait_mbox); |
| 1109 | intel_ring_emit(waiter, seqno); |
| 1110 | intel_ring_emit(waiter, 0); |
| 1111 | intel_ring_emit(waiter, MI_NOOP); |
| 1112 | } else { |
| 1113 | intel_ring_emit(waiter, MI_NOOP); |
| 1114 | intel_ring_emit(waiter, MI_NOOP); |
| 1115 | intel_ring_emit(waiter, MI_NOOP); |
| 1116 | intel_ring_emit(waiter, MI_NOOP); |
| 1117 | } |
| 1118 | intel_ring_advance(waiter); |
| 1119 | |
| 1120 | return 0; |
| 1121 | } |
| 1122 | |
| 1123 | #define PIPE_CONTROL_FLUSH(ring__, addr__) \ |
| 1124 | do { \ |
| 1125 | intel_ring_emit(ring__, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE | \ |
| 1126 | PIPE_CONTROL_DEPTH_STALL); \ |
| 1127 | intel_ring_emit(ring__, (addr__) | PIPE_CONTROL_GLOBAL_GTT); \ |
| 1128 | intel_ring_emit(ring__, 0); \ |
| 1129 | intel_ring_emit(ring__, 0); \ |
| 1130 | } while (0) |
| 1131 | |
| 1132 | static int |
| 1133 | pc_render_add_request(struct intel_engine_cs *ring) |
| 1134 | { |
| 1135 | u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES; |
| 1136 | int ret; |
| 1137 | |
| 1138 | /* For Ironlake, MI_USER_INTERRUPT was deprecated and apparently |
| 1139 | * incoherent with writes to memory, i.e. completely fubar, |
| 1140 | * so we need to use PIPE_NOTIFY instead. |
| 1141 | * |
| 1142 | * However, we also need to workaround the qword write |
| 1143 | * incoherence by flushing the 6 PIPE_NOTIFY buffers out to |
| 1144 | * memory before requesting an interrupt. |
| 1145 | */ |
| 1146 | ret = intel_ring_begin(ring, 32); |
| 1147 | if (ret) |
| 1148 | return ret; |
| 1149 | |
| 1150 | intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE | |
| 1151 | PIPE_CONTROL_WRITE_FLUSH | |
| 1152 | PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE); |
| 1153 | intel_ring_emit(ring, ring->scratch.gtt_offset | PIPE_CONTROL_GLOBAL_GTT); |
| 1154 | intel_ring_emit(ring, |
| 1155 | i915_gem_request_get_seqno(ring->outstanding_lazy_request)); |
| 1156 | intel_ring_emit(ring, 0); |
| 1157 | PIPE_CONTROL_FLUSH(ring, scratch_addr); |
| 1158 | scratch_addr += 2 * CACHELINE_BYTES; /* write to separate cachelines */ |
| 1159 | PIPE_CONTROL_FLUSH(ring, scratch_addr); |
| 1160 | scratch_addr += 2 * CACHELINE_BYTES; |
| 1161 | PIPE_CONTROL_FLUSH(ring, scratch_addr); |
| 1162 | scratch_addr += 2 * CACHELINE_BYTES; |
| 1163 | PIPE_CONTROL_FLUSH(ring, scratch_addr); |
| 1164 | scratch_addr += 2 * CACHELINE_BYTES; |
| 1165 | PIPE_CONTROL_FLUSH(ring, scratch_addr); |
| 1166 | scratch_addr += 2 * CACHELINE_BYTES; |
| 1167 | PIPE_CONTROL_FLUSH(ring, scratch_addr); |
| 1168 | |
| 1169 | intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE | |
| 1170 | PIPE_CONTROL_WRITE_FLUSH | |
| 1171 | PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE | |
| 1172 | PIPE_CONTROL_NOTIFY); |
| 1173 | intel_ring_emit(ring, ring->scratch.gtt_offset | PIPE_CONTROL_GLOBAL_GTT); |
| 1174 | intel_ring_emit(ring, |
| 1175 | i915_gem_request_get_seqno(ring->outstanding_lazy_request)); |
| 1176 | intel_ring_emit(ring, 0); |
| 1177 | __intel_ring_advance(ring); |
| 1178 | |
| 1179 | return 0; |
| 1180 | } |
| 1181 | |
| 1182 | static u32 |
| 1183 | gen6_ring_get_seqno(struct intel_engine_cs *ring, bool lazy_coherency) |
| 1184 | { |
| 1185 | /* Workaround to force correct ordering between irq and seqno writes on |
| 1186 | * ivb (and maybe also on snb) by reading from a CS register (like |
| 1187 | * ACTHD) before reading the status page. */ |
| 1188 | if (!lazy_coherency) { |
| 1189 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 1190 | POSTING_READ(RING_ACTHD(ring->mmio_base)); |
| 1191 | } |
| 1192 | |
| 1193 | return intel_read_status_page(ring, I915_GEM_HWS_INDEX); |
| 1194 | } |
| 1195 | |
| 1196 | static u32 |
| 1197 | ring_get_seqno(struct intel_engine_cs *ring, bool lazy_coherency) |
| 1198 | { |
| 1199 | return intel_read_status_page(ring, I915_GEM_HWS_INDEX); |
| 1200 | } |
| 1201 | |
| 1202 | static void |
| 1203 | ring_set_seqno(struct intel_engine_cs *ring, u32 seqno) |
| 1204 | { |
| 1205 | intel_write_status_page(ring, I915_GEM_HWS_INDEX, seqno); |
| 1206 | } |
| 1207 | |
| 1208 | static u32 |
| 1209 | pc_render_get_seqno(struct intel_engine_cs *ring, bool lazy_coherency) |
| 1210 | { |
| 1211 | return ring->scratch.cpu_page[0]; |
| 1212 | } |
| 1213 | |
| 1214 | static void |
| 1215 | pc_render_set_seqno(struct intel_engine_cs *ring, u32 seqno) |
| 1216 | { |
| 1217 | ring->scratch.cpu_page[0] = seqno; |
| 1218 | } |
| 1219 | |
| 1220 | static bool |
| 1221 | gen5_ring_get_irq(struct intel_engine_cs *ring) |
| 1222 | { |
| 1223 | struct drm_device *dev = ring->dev; |
| 1224 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1225 | unsigned long flags; |
| 1226 | |
| 1227 | if (WARN_ON(!intel_irqs_enabled(dev_priv))) |
| 1228 | return false; |
| 1229 | |
| 1230 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1231 | if (ring->irq_refcount++ == 0) |
| 1232 | gen5_enable_gt_irq(dev_priv, ring->irq_enable_mask); |
| 1233 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1234 | |
| 1235 | return true; |
| 1236 | } |
| 1237 | |
| 1238 | static void |
| 1239 | gen5_ring_put_irq(struct intel_engine_cs *ring) |
| 1240 | { |
| 1241 | struct drm_device *dev = ring->dev; |
| 1242 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1243 | unsigned long flags; |
| 1244 | |
| 1245 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1246 | if (--ring->irq_refcount == 0) |
| 1247 | gen5_disable_gt_irq(dev_priv, ring->irq_enable_mask); |
| 1248 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1249 | } |
| 1250 | |
| 1251 | static bool |
| 1252 | i9xx_ring_get_irq(struct intel_engine_cs *ring) |
| 1253 | { |
| 1254 | struct drm_device *dev = ring->dev; |
| 1255 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1256 | unsigned long flags; |
| 1257 | |
| 1258 | if (!intel_irqs_enabled(dev_priv)) |
| 1259 | return false; |
| 1260 | |
| 1261 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1262 | if (ring->irq_refcount++ == 0) { |
| 1263 | dev_priv->irq_mask &= ~ring->irq_enable_mask; |
| 1264 | I915_WRITE(IMR, dev_priv->irq_mask); |
| 1265 | POSTING_READ(IMR); |
| 1266 | } |
| 1267 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1268 | |
| 1269 | return true; |
| 1270 | } |
| 1271 | |
| 1272 | static void |
| 1273 | i9xx_ring_put_irq(struct intel_engine_cs *ring) |
| 1274 | { |
| 1275 | struct drm_device *dev = ring->dev; |
| 1276 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1277 | unsigned long flags; |
| 1278 | |
| 1279 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1280 | if (--ring->irq_refcount == 0) { |
| 1281 | dev_priv->irq_mask |= ring->irq_enable_mask; |
| 1282 | I915_WRITE(IMR, dev_priv->irq_mask); |
| 1283 | POSTING_READ(IMR); |
| 1284 | } |
| 1285 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1286 | } |
| 1287 | |
| 1288 | static bool |
| 1289 | i8xx_ring_get_irq(struct intel_engine_cs *ring) |
| 1290 | { |
| 1291 | struct drm_device *dev = ring->dev; |
| 1292 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1293 | unsigned long flags; |
| 1294 | |
| 1295 | if (!intel_irqs_enabled(dev_priv)) |
| 1296 | return false; |
| 1297 | |
| 1298 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1299 | if (ring->irq_refcount++ == 0) { |
| 1300 | dev_priv->irq_mask &= ~ring->irq_enable_mask; |
| 1301 | I915_WRITE16(IMR, dev_priv->irq_mask); |
| 1302 | POSTING_READ16(IMR); |
| 1303 | } |
| 1304 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1305 | |
| 1306 | return true; |
| 1307 | } |
| 1308 | |
| 1309 | static void |
| 1310 | i8xx_ring_put_irq(struct intel_engine_cs *ring) |
| 1311 | { |
| 1312 | struct drm_device *dev = ring->dev; |
| 1313 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1314 | unsigned long flags; |
| 1315 | |
| 1316 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1317 | if (--ring->irq_refcount == 0) { |
| 1318 | dev_priv->irq_mask |= ring->irq_enable_mask; |
| 1319 | I915_WRITE16(IMR, dev_priv->irq_mask); |
| 1320 | POSTING_READ16(IMR); |
| 1321 | } |
| 1322 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1323 | } |
| 1324 | |
| 1325 | void intel_ring_setup_status_page(struct intel_engine_cs *ring) |
| 1326 | { |
| 1327 | struct drm_device *dev = ring->dev; |
| 1328 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 1329 | u32 mmio = 0; |
| 1330 | |
| 1331 | /* The ring status page addresses are no longer next to the rest of |
| 1332 | * the ring registers as of gen7. |
| 1333 | */ |
| 1334 | if (IS_GEN7(dev)) { |
| 1335 | switch (ring->id) { |
| 1336 | case RCS: |
| 1337 | mmio = RENDER_HWS_PGA_GEN7; |
| 1338 | break; |
| 1339 | case BCS: |
| 1340 | mmio = BLT_HWS_PGA_GEN7; |
| 1341 | break; |
| 1342 | /* |
| 1343 | * VCS2 actually doesn't exist on Gen7. Only shut up |
| 1344 | * gcc switch check warning |
| 1345 | */ |
| 1346 | case VCS2: |
| 1347 | case VCS: |
| 1348 | mmio = BSD_HWS_PGA_GEN7; |
| 1349 | break; |
| 1350 | case VECS: |
| 1351 | mmio = VEBOX_HWS_PGA_GEN7; |
| 1352 | break; |
| 1353 | } |
| 1354 | } else if (IS_GEN6(ring->dev)) { |
| 1355 | mmio = RING_HWS_PGA_GEN6(ring->mmio_base); |
| 1356 | } else { |
| 1357 | /* XXX: gen8 returns to sanity */ |
| 1358 | mmio = RING_HWS_PGA(ring->mmio_base); |
| 1359 | } |
| 1360 | |
| 1361 | I915_WRITE(mmio, (u32)ring->status_page.gfx_addr); |
| 1362 | POSTING_READ(mmio); |
| 1363 | |
| 1364 | /* |
| 1365 | * Flush the TLB for this page |
| 1366 | * |
| 1367 | * FIXME: These two bits have disappeared on gen8, so a question |
| 1368 | * arises: do we still need this and if so how should we go about |
| 1369 | * invalidating the TLB? |
| 1370 | */ |
| 1371 | if (INTEL_INFO(dev)->gen >= 6 && INTEL_INFO(dev)->gen < 8) { |
| 1372 | u32 reg = RING_INSTPM(ring->mmio_base); |
| 1373 | |
| 1374 | /* ring should be idle before issuing a sync flush*/ |
| 1375 | WARN_ON((I915_READ_MODE(ring) & MODE_IDLE) == 0); |
| 1376 | |
| 1377 | I915_WRITE(reg, |
| 1378 | _MASKED_BIT_ENABLE(INSTPM_TLB_INVALIDATE | |
| 1379 | INSTPM_SYNC_FLUSH)); |
| 1380 | if (wait_for((I915_READ(reg) & INSTPM_SYNC_FLUSH) == 0, |
| 1381 | 1000)) |
| 1382 | DRM_ERROR("%s: wait for SyncFlush to complete for TLB invalidation timed out\n", |
| 1383 | ring->name); |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | static int |
| 1388 | bsd_ring_flush(struct intel_engine_cs *ring, |
| 1389 | u32 invalidate_domains, |
| 1390 | u32 flush_domains) |
| 1391 | { |
| 1392 | int ret; |
| 1393 | |
| 1394 | ret = intel_ring_begin(ring, 2); |
| 1395 | if (ret) |
| 1396 | return ret; |
| 1397 | |
| 1398 | intel_ring_emit(ring, MI_FLUSH); |
| 1399 | intel_ring_emit(ring, MI_NOOP); |
| 1400 | intel_ring_advance(ring); |
| 1401 | return 0; |
| 1402 | } |
| 1403 | |
| 1404 | static int |
| 1405 | i9xx_add_request(struct intel_engine_cs *ring) |
| 1406 | { |
| 1407 | int ret; |
| 1408 | |
| 1409 | ret = intel_ring_begin(ring, 4); |
| 1410 | if (ret) |
| 1411 | return ret; |
| 1412 | |
| 1413 | intel_ring_emit(ring, MI_STORE_DWORD_INDEX); |
| 1414 | intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); |
| 1415 | intel_ring_emit(ring, |
| 1416 | i915_gem_request_get_seqno(ring->outstanding_lazy_request)); |
| 1417 | intel_ring_emit(ring, MI_USER_INTERRUPT); |
| 1418 | __intel_ring_advance(ring); |
| 1419 | |
| 1420 | return 0; |
| 1421 | } |
| 1422 | |
| 1423 | static bool |
| 1424 | gen6_ring_get_irq(struct intel_engine_cs *ring) |
| 1425 | { |
| 1426 | struct drm_device *dev = ring->dev; |
| 1427 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1428 | unsigned long flags; |
| 1429 | |
| 1430 | if (WARN_ON(!intel_irqs_enabled(dev_priv))) |
| 1431 | return false; |
| 1432 | |
| 1433 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1434 | if (ring->irq_refcount++ == 0) { |
| 1435 | if (HAS_L3_DPF(dev) && ring->id == RCS) |
| 1436 | I915_WRITE_IMR(ring, |
| 1437 | ~(ring->irq_enable_mask | |
| 1438 | GT_PARITY_ERROR(dev))); |
| 1439 | else |
| 1440 | I915_WRITE_IMR(ring, ~ring->irq_enable_mask); |
| 1441 | gen5_enable_gt_irq(dev_priv, ring->irq_enable_mask); |
| 1442 | } |
| 1443 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1444 | |
| 1445 | return true; |
| 1446 | } |
| 1447 | |
| 1448 | static void |
| 1449 | gen6_ring_put_irq(struct intel_engine_cs *ring) |
| 1450 | { |
| 1451 | struct drm_device *dev = ring->dev; |
| 1452 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1453 | unsigned long flags; |
| 1454 | |
| 1455 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1456 | if (--ring->irq_refcount == 0) { |
| 1457 | if (HAS_L3_DPF(dev) && ring->id == RCS) |
| 1458 | I915_WRITE_IMR(ring, ~GT_PARITY_ERROR(dev)); |
| 1459 | else |
| 1460 | I915_WRITE_IMR(ring, ~0); |
| 1461 | gen5_disable_gt_irq(dev_priv, ring->irq_enable_mask); |
| 1462 | } |
| 1463 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1464 | } |
| 1465 | |
| 1466 | static bool |
| 1467 | hsw_vebox_get_irq(struct intel_engine_cs *ring) |
| 1468 | { |
| 1469 | struct drm_device *dev = ring->dev; |
| 1470 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1471 | unsigned long flags; |
| 1472 | |
| 1473 | if (WARN_ON(!intel_irqs_enabled(dev_priv))) |
| 1474 | return false; |
| 1475 | |
| 1476 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1477 | if (ring->irq_refcount++ == 0) { |
| 1478 | I915_WRITE_IMR(ring, ~ring->irq_enable_mask); |
| 1479 | gen6_enable_pm_irq(dev_priv, ring->irq_enable_mask); |
| 1480 | } |
| 1481 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1482 | |
| 1483 | return true; |
| 1484 | } |
| 1485 | |
| 1486 | static void |
| 1487 | hsw_vebox_put_irq(struct intel_engine_cs *ring) |
| 1488 | { |
| 1489 | struct drm_device *dev = ring->dev; |
| 1490 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1491 | unsigned long flags; |
| 1492 | |
| 1493 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1494 | if (--ring->irq_refcount == 0) { |
| 1495 | I915_WRITE_IMR(ring, ~0); |
| 1496 | gen6_disable_pm_irq(dev_priv, ring->irq_enable_mask); |
| 1497 | } |
| 1498 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1499 | } |
| 1500 | |
| 1501 | static bool |
| 1502 | gen8_ring_get_irq(struct intel_engine_cs *ring) |
| 1503 | { |
| 1504 | struct drm_device *dev = ring->dev; |
| 1505 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1506 | unsigned long flags; |
| 1507 | |
| 1508 | if (WARN_ON(!intel_irqs_enabled(dev_priv))) |
| 1509 | return false; |
| 1510 | |
| 1511 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1512 | if (ring->irq_refcount++ == 0) { |
| 1513 | if (HAS_L3_DPF(dev) && ring->id == RCS) { |
| 1514 | I915_WRITE_IMR(ring, |
| 1515 | ~(ring->irq_enable_mask | |
| 1516 | GT_RENDER_L3_PARITY_ERROR_INTERRUPT)); |
| 1517 | } else { |
| 1518 | I915_WRITE_IMR(ring, ~ring->irq_enable_mask); |
| 1519 | } |
| 1520 | POSTING_READ(RING_IMR(ring->mmio_base)); |
| 1521 | } |
| 1522 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1523 | |
| 1524 | return true; |
| 1525 | } |
| 1526 | |
| 1527 | static void |
| 1528 | gen8_ring_put_irq(struct intel_engine_cs *ring) |
| 1529 | { |
| 1530 | struct drm_device *dev = ring->dev; |
| 1531 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1532 | unsigned long flags; |
| 1533 | |
| 1534 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1535 | if (--ring->irq_refcount == 0) { |
| 1536 | if (HAS_L3_DPF(dev) && ring->id == RCS) { |
| 1537 | I915_WRITE_IMR(ring, |
| 1538 | ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT); |
| 1539 | } else { |
| 1540 | I915_WRITE_IMR(ring, ~0); |
| 1541 | } |
| 1542 | POSTING_READ(RING_IMR(ring->mmio_base)); |
| 1543 | } |
| 1544 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1545 | } |
| 1546 | |
| 1547 | static int |
| 1548 | i965_dispatch_execbuffer(struct intel_engine_cs *ring, |
| 1549 | u64 offset, u32 length, |
| 1550 | unsigned flags) |
| 1551 | { |
| 1552 | int ret; |
| 1553 | |
| 1554 | ret = intel_ring_begin(ring, 2); |
| 1555 | if (ret) |
| 1556 | return ret; |
| 1557 | |
| 1558 | intel_ring_emit(ring, |
| 1559 | MI_BATCH_BUFFER_START | |
| 1560 | MI_BATCH_GTT | |
| 1561 | (flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE_I965)); |
| 1562 | intel_ring_emit(ring, offset); |
| 1563 | intel_ring_advance(ring); |
| 1564 | |
| 1565 | return 0; |
| 1566 | } |
| 1567 | |
| 1568 | /* Just userspace ABI convention to limit the wa batch bo to a resonable size */ |
| 1569 | #define I830_BATCH_LIMIT (256*1024) |
| 1570 | #define I830_TLB_ENTRIES (2) |
| 1571 | #define I830_WA_SIZE max(I830_TLB_ENTRIES*4096, I830_BATCH_LIMIT) |
| 1572 | static int |
| 1573 | i830_dispatch_execbuffer(struct intel_engine_cs *ring, |
| 1574 | u64 offset, u32 len, |
| 1575 | unsigned flags) |
| 1576 | { |
| 1577 | u32 cs_offset = ring->scratch.gtt_offset; |
| 1578 | int ret; |
| 1579 | |
| 1580 | ret = intel_ring_begin(ring, 6); |
| 1581 | if (ret) |
| 1582 | return ret; |
| 1583 | |
| 1584 | /* Evict the invalid PTE TLBs */ |
| 1585 | intel_ring_emit(ring, COLOR_BLT_CMD | BLT_WRITE_RGBA); |
| 1586 | intel_ring_emit(ring, BLT_DEPTH_32 | BLT_ROP_COLOR_COPY | 4096); |
| 1587 | intel_ring_emit(ring, I830_TLB_ENTRIES << 16 | 4); /* load each page */ |
| 1588 | intel_ring_emit(ring, cs_offset); |
| 1589 | intel_ring_emit(ring, 0xdeadbeef); |
| 1590 | intel_ring_emit(ring, MI_NOOP); |
| 1591 | intel_ring_advance(ring); |
| 1592 | |
| 1593 | if ((flags & I915_DISPATCH_PINNED) == 0) { |
| 1594 | if (len > I830_BATCH_LIMIT) |
| 1595 | return -ENOSPC; |
| 1596 | |
| 1597 | ret = intel_ring_begin(ring, 6 + 2); |
| 1598 | if (ret) |
| 1599 | return ret; |
| 1600 | |
| 1601 | /* Blit the batch (which has now all relocs applied) to the |
| 1602 | * stable batch scratch bo area (so that the CS never |
| 1603 | * stumbles over its tlb invalidation bug) ... |
| 1604 | */ |
| 1605 | intel_ring_emit(ring, SRC_COPY_BLT_CMD | BLT_WRITE_RGBA); |
| 1606 | intel_ring_emit(ring, BLT_DEPTH_32 | BLT_ROP_SRC_COPY | 4096); |
| 1607 | intel_ring_emit(ring, DIV_ROUND_UP(len, 4096) << 16 | 4096); |
| 1608 | intel_ring_emit(ring, cs_offset); |
| 1609 | intel_ring_emit(ring, 4096); |
| 1610 | intel_ring_emit(ring, offset); |
| 1611 | |
| 1612 | intel_ring_emit(ring, MI_FLUSH); |
| 1613 | intel_ring_emit(ring, MI_NOOP); |
| 1614 | intel_ring_advance(ring); |
| 1615 | |
| 1616 | /* ... and execute it. */ |
| 1617 | offset = cs_offset; |
| 1618 | } |
| 1619 | |
| 1620 | ret = intel_ring_begin(ring, 4); |
| 1621 | if (ret) |
| 1622 | return ret; |
| 1623 | |
| 1624 | intel_ring_emit(ring, MI_BATCH_BUFFER); |
| 1625 | intel_ring_emit(ring, offset | (flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE)); |
| 1626 | intel_ring_emit(ring, offset + len - 8); |
| 1627 | intel_ring_emit(ring, MI_NOOP); |
| 1628 | intel_ring_advance(ring); |
| 1629 | |
| 1630 | return 0; |
| 1631 | } |
| 1632 | |
| 1633 | static int |
| 1634 | i915_dispatch_execbuffer(struct intel_engine_cs *ring, |
| 1635 | u64 offset, u32 len, |
| 1636 | unsigned flags) |
| 1637 | { |
| 1638 | int ret; |
| 1639 | |
| 1640 | ret = intel_ring_begin(ring, 2); |
| 1641 | if (ret) |
| 1642 | return ret; |
| 1643 | |
| 1644 | intel_ring_emit(ring, MI_BATCH_BUFFER_START | MI_BATCH_GTT); |
| 1645 | intel_ring_emit(ring, offset | (flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE)); |
| 1646 | intel_ring_advance(ring); |
| 1647 | |
| 1648 | return 0; |
| 1649 | } |
| 1650 | |
| 1651 | static void cleanup_status_page(struct intel_engine_cs *ring) |
| 1652 | { |
| 1653 | struct drm_i915_gem_object *obj; |
| 1654 | |
| 1655 | obj = ring->status_page.obj; |
| 1656 | if (obj == NULL) |
| 1657 | return; |
| 1658 | |
| 1659 | kunmap(sg_page(obj->pages->sgl)); |
| 1660 | i915_gem_object_ggtt_unpin(obj); |
| 1661 | drm_gem_object_unreference(&obj->base); |
| 1662 | ring->status_page.obj = NULL; |
| 1663 | } |
| 1664 | |
| 1665 | static int init_status_page(struct intel_engine_cs *ring) |
| 1666 | { |
| 1667 | struct drm_i915_gem_object *obj; |
| 1668 | |
| 1669 | if ((obj = ring->status_page.obj) == NULL) { |
| 1670 | unsigned flags; |
| 1671 | int ret; |
| 1672 | |
| 1673 | obj = i915_gem_alloc_object(ring->dev, 4096); |
| 1674 | if (obj == NULL) { |
| 1675 | DRM_ERROR("Failed to allocate status page\n"); |
| 1676 | return -ENOMEM; |
| 1677 | } |
| 1678 | |
| 1679 | ret = i915_gem_object_set_cache_level(obj, I915_CACHE_LLC); |
| 1680 | if (ret) |
| 1681 | goto err_unref; |
| 1682 | |
| 1683 | flags = 0; |
| 1684 | if (!HAS_LLC(ring->dev)) |
| 1685 | /* On g33, we cannot place HWS above 256MiB, so |
| 1686 | * restrict its pinning to the low mappable arena. |
| 1687 | * Though this restriction is not documented for |
| 1688 | * gen4, gen5, or byt, they also behave similarly |
| 1689 | * and hang if the HWS is placed at the top of the |
| 1690 | * GTT. To generalise, it appears that all !llc |
| 1691 | * platforms have issues with us placing the HWS |
| 1692 | * above the mappable region (even though we never |
| 1693 | * actualy map it). |
| 1694 | */ |
| 1695 | flags |= PIN_MAPPABLE; |
| 1696 | ret = i915_gem_obj_ggtt_pin(obj, 4096, flags); |
| 1697 | if (ret) { |
| 1698 | err_unref: |
| 1699 | drm_gem_object_unreference(&obj->base); |
| 1700 | return ret; |
| 1701 | } |
| 1702 | |
| 1703 | ring->status_page.obj = obj; |
| 1704 | } |
| 1705 | |
| 1706 | ring->status_page.gfx_addr = i915_gem_obj_ggtt_offset(obj); |
| 1707 | ring->status_page.page_addr = kmap(sg_page(obj->pages->sgl)); |
| 1708 | memset(ring->status_page.page_addr, 0, PAGE_SIZE); |
| 1709 | |
| 1710 | DRM_DEBUG_DRIVER("%s hws offset: 0x%08x\n", |
| 1711 | ring->name, ring->status_page.gfx_addr); |
| 1712 | |
| 1713 | return 0; |
| 1714 | } |
| 1715 | |
| 1716 | static int init_phys_status_page(struct intel_engine_cs *ring) |
| 1717 | { |
| 1718 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 1719 | |
| 1720 | if (!dev_priv->status_page_dmah) { |
| 1721 | dev_priv->status_page_dmah = |
| 1722 | drm_pci_alloc(ring->dev, PAGE_SIZE, PAGE_SIZE); |
| 1723 | if (!dev_priv->status_page_dmah) |
| 1724 | return -ENOMEM; |
| 1725 | } |
| 1726 | |
| 1727 | ring->status_page.page_addr = dev_priv->status_page_dmah->vaddr; |
| 1728 | memset(ring->status_page.page_addr, 0, PAGE_SIZE); |
| 1729 | |
| 1730 | return 0; |
| 1731 | } |
| 1732 | |
| 1733 | void intel_unpin_ringbuffer_obj(struct intel_ringbuffer *ringbuf) |
| 1734 | { |
| 1735 | iounmap(ringbuf->virtual_start); |
| 1736 | ringbuf->virtual_start = NULL; |
| 1737 | i915_gem_object_ggtt_unpin(ringbuf->obj); |
| 1738 | } |
| 1739 | |
| 1740 | int intel_pin_and_map_ringbuffer_obj(struct drm_device *dev, |
| 1741 | struct intel_ringbuffer *ringbuf) |
| 1742 | { |
| 1743 | struct drm_i915_private *dev_priv = to_i915(dev); |
| 1744 | struct drm_i915_gem_object *obj = ringbuf->obj; |
| 1745 | int ret; |
| 1746 | |
| 1747 | ret = i915_gem_obj_ggtt_pin(obj, PAGE_SIZE, PIN_MAPPABLE); |
| 1748 | if (ret) |
| 1749 | return ret; |
| 1750 | |
| 1751 | ret = i915_gem_object_set_to_gtt_domain(obj, true); |
| 1752 | if (ret) { |
| 1753 | i915_gem_object_ggtt_unpin(obj); |
| 1754 | return ret; |
| 1755 | } |
| 1756 | |
| 1757 | ringbuf->virtual_start = ioremap_wc(dev_priv->gtt.mappable_base + |
| 1758 | i915_gem_obj_ggtt_offset(obj), ringbuf->size); |
| 1759 | if (ringbuf->virtual_start == NULL) { |
| 1760 | i915_gem_object_ggtt_unpin(obj); |
| 1761 | return -EINVAL; |
| 1762 | } |
| 1763 | |
| 1764 | return 0; |
| 1765 | } |
| 1766 | |
| 1767 | void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf) |
| 1768 | { |
| 1769 | drm_gem_object_unreference(&ringbuf->obj->base); |
| 1770 | ringbuf->obj = NULL; |
| 1771 | } |
| 1772 | |
| 1773 | int intel_alloc_ringbuffer_obj(struct drm_device *dev, |
| 1774 | struct intel_ringbuffer *ringbuf) |
| 1775 | { |
| 1776 | struct drm_i915_gem_object *obj; |
| 1777 | |
| 1778 | obj = NULL; |
| 1779 | if (!HAS_LLC(dev)) |
| 1780 | obj = i915_gem_object_create_stolen(dev, ringbuf->size); |
| 1781 | if (obj == NULL) |
| 1782 | obj = i915_gem_alloc_object(dev, ringbuf->size); |
| 1783 | if (obj == NULL) |
| 1784 | return -ENOMEM; |
| 1785 | |
| 1786 | /* mark ring buffers as read-only from GPU side by default */ |
| 1787 | obj->gt_ro = 1; |
| 1788 | |
| 1789 | ringbuf->obj = obj; |
| 1790 | |
| 1791 | return 0; |
| 1792 | } |
| 1793 | |
| 1794 | static int intel_init_ring_buffer(struct drm_device *dev, |
| 1795 | struct intel_engine_cs *ring) |
| 1796 | { |
| 1797 | struct intel_ringbuffer *ringbuf = ring->buffer; |
| 1798 | int ret; |
| 1799 | |
| 1800 | if (ringbuf == NULL) { |
| 1801 | ringbuf = kzalloc(sizeof(*ringbuf), GFP_KERNEL); |
| 1802 | if (!ringbuf) |
| 1803 | return -ENOMEM; |
| 1804 | ring->buffer = ringbuf; |
| 1805 | } |
| 1806 | |
| 1807 | ring->dev = dev; |
| 1808 | INIT_LIST_HEAD(&ring->active_list); |
| 1809 | INIT_LIST_HEAD(&ring->request_list); |
| 1810 | INIT_LIST_HEAD(&ring->execlist_queue); |
| 1811 | ringbuf->size = 32 * PAGE_SIZE; |
| 1812 | ringbuf->ring = ring; |
| 1813 | memset(ring->semaphore.sync_seqno, 0, sizeof(ring->semaphore.sync_seqno)); |
| 1814 | |
| 1815 | init_waitqueue_head(&ring->irq_queue); |
| 1816 | |
| 1817 | if (I915_NEED_GFX_HWS(dev)) { |
| 1818 | ret = init_status_page(ring); |
| 1819 | if (ret) |
| 1820 | goto error; |
| 1821 | } else { |
| 1822 | BUG_ON(ring->id != RCS); |
| 1823 | ret = init_phys_status_page(ring); |
| 1824 | if (ret) |
| 1825 | goto error; |
| 1826 | } |
| 1827 | |
| 1828 | if (ringbuf->obj == NULL) { |
| 1829 | ret = intel_alloc_ringbuffer_obj(dev, ringbuf); |
| 1830 | if (ret) { |
| 1831 | DRM_ERROR("Failed to allocate ringbuffer %s: %d\n", |
| 1832 | ring->name, ret); |
| 1833 | goto error; |
| 1834 | } |
| 1835 | |
| 1836 | ret = intel_pin_and_map_ringbuffer_obj(dev, ringbuf); |
| 1837 | if (ret) { |
| 1838 | DRM_ERROR("Failed to pin and map ringbuffer %s: %d\n", |
| 1839 | ring->name, ret); |
| 1840 | intel_destroy_ringbuffer_obj(ringbuf); |
| 1841 | goto error; |
| 1842 | } |
| 1843 | } |
| 1844 | |
| 1845 | /* Workaround an erratum on the i830 which causes a hang if |
| 1846 | * the TAIL pointer points to within the last 2 cachelines |
| 1847 | * of the buffer. |
| 1848 | */ |
| 1849 | ringbuf->effective_size = ringbuf->size; |
| 1850 | if (IS_I830(dev) || IS_845G(dev)) |
| 1851 | ringbuf->effective_size -= 2 * CACHELINE_BYTES; |
| 1852 | |
| 1853 | ret = i915_cmd_parser_init_ring(ring); |
| 1854 | if (ret) |
| 1855 | goto error; |
| 1856 | |
| 1857 | ret = ring->init(ring); |
| 1858 | if (ret) |
| 1859 | goto error; |
| 1860 | |
| 1861 | return 0; |
| 1862 | |
| 1863 | error: |
| 1864 | kfree(ringbuf); |
| 1865 | ring->buffer = NULL; |
| 1866 | return ret; |
| 1867 | } |
| 1868 | |
| 1869 | void intel_cleanup_ring_buffer(struct intel_engine_cs *ring) |
| 1870 | { |
| 1871 | struct drm_i915_private *dev_priv; |
| 1872 | struct intel_ringbuffer *ringbuf; |
| 1873 | |
| 1874 | if (!intel_ring_initialized(ring)) |
| 1875 | return; |
| 1876 | |
| 1877 | dev_priv = to_i915(ring->dev); |
| 1878 | ringbuf = ring->buffer; |
| 1879 | |
| 1880 | intel_stop_ring_buffer(ring); |
| 1881 | WARN_ON(!IS_GEN2(ring->dev) && (I915_READ_MODE(ring) & MODE_IDLE) == 0); |
| 1882 | |
| 1883 | intel_unpin_ringbuffer_obj(ringbuf); |
| 1884 | intel_destroy_ringbuffer_obj(ringbuf); |
| 1885 | i915_gem_request_assign(&ring->outstanding_lazy_request, NULL); |
| 1886 | |
| 1887 | if (ring->cleanup) |
| 1888 | ring->cleanup(ring); |
| 1889 | |
| 1890 | cleanup_status_page(ring); |
| 1891 | |
| 1892 | i915_cmd_parser_fini_ring(ring); |
| 1893 | |
| 1894 | kfree(ringbuf); |
| 1895 | ring->buffer = NULL; |
| 1896 | } |
| 1897 | |
| 1898 | static int intel_ring_wait_request(struct intel_engine_cs *ring, int n) |
| 1899 | { |
| 1900 | struct intel_ringbuffer *ringbuf = ring->buffer; |
| 1901 | struct drm_i915_gem_request *request; |
| 1902 | int ret; |
| 1903 | |
| 1904 | if (ringbuf->last_retired_head != -1) { |
| 1905 | ringbuf->head = ringbuf->last_retired_head; |
| 1906 | ringbuf->last_retired_head = -1; |
| 1907 | |
| 1908 | ringbuf->space = intel_ring_space(ringbuf); |
| 1909 | if (ringbuf->space >= n) |
| 1910 | return 0; |
| 1911 | } |
| 1912 | |
| 1913 | list_for_each_entry(request, &ring->request_list, list) { |
| 1914 | if (__intel_ring_space(request->tail, ringbuf->tail, |
| 1915 | ringbuf->size) >= n) { |
| 1916 | break; |
| 1917 | } |
| 1918 | } |
| 1919 | |
| 1920 | if (&request->list == &ring->request_list) |
| 1921 | return -ENOSPC; |
| 1922 | |
| 1923 | ret = i915_wait_request(request); |
| 1924 | if (ret) |
| 1925 | return ret; |
| 1926 | |
| 1927 | i915_gem_retire_requests_ring(ring); |
| 1928 | ringbuf->head = ringbuf->last_retired_head; |
| 1929 | ringbuf->last_retired_head = -1; |
| 1930 | |
| 1931 | ringbuf->space = intel_ring_space(ringbuf); |
| 1932 | return 0; |
| 1933 | } |
| 1934 | |
| 1935 | static int ring_wait_for_space(struct intel_engine_cs *ring, int n) |
| 1936 | { |
| 1937 | struct drm_device *dev = ring->dev; |
| 1938 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1939 | struct intel_ringbuffer *ringbuf = ring->buffer; |
| 1940 | unsigned long end; |
| 1941 | int ret; |
| 1942 | |
| 1943 | ret = intel_ring_wait_request(ring, n); |
| 1944 | if (ret != -ENOSPC) |
| 1945 | return ret; |
| 1946 | |
| 1947 | /* force the tail write in case we have been skipping them */ |
| 1948 | __intel_ring_advance(ring); |
| 1949 | |
| 1950 | /* With GEM the hangcheck timer should kick us out of the loop, |
| 1951 | * leaving it early runs the risk of corrupting GEM state (due |
| 1952 | * to running on almost untested codepaths). But on resume |
| 1953 | * timers don't work yet, so prevent a complete hang in that |
| 1954 | * case by choosing an insanely large timeout. */ |
| 1955 | end = jiffies + 60 * HZ; |
| 1956 | |
| 1957 | trace_i915_ring_wait_begin(ring); |
| 1958 | do { |
| 1959 | ringbuf->head = I915_READ_HEAD(ring); |
| 1960 | ringbuf->space = intel_ring_space(ringbuf); |
| 1961 | if (ringbuf->space >= n) { |
| 1962 | ret = 0; |
| 1963 | break; |
| 1964 | } |
| 1965 | |
| 1966 | msleep(1); |
| 1967 | |
| 1968 | if (dev_priv->mm.interruptible && signal_pending(current)) { |
| 1969 | ret = -ERESTARTSYS; |
| 1970 | break; |
| 1971 | } |
| 1972 | |
| 1973 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, |
| 1974 | dev_priv->mm.interruptible); |
| 1975 | if (ret) |
| 1976 | break; |
| 1977 | |
| 1978 | if (time_after(jiffies, end)) { |
| 1979 | ret = -EBUSY; |
| 1980 | break; |
| 1981 | } |
| 1982 | } while (1); |
| 1983 | trace_i915_ring_wait_end(ring); |
| 1984 | return ret; |
| 1985 | } |
| 1986 | |
| 1987 | static int intel_wrap_ring_buffer(struct intel_engine_cs *ring) |
| 1988 | { |
| 1989 | uint32_t __iomem *virt; |
| 1990 | struct intel_ringbuffer *ringbuf = ring->buffer; |
| 1991 | int rem = ringbuf->size - ringbuf->tail; |
| 1992 | |
| 1993 | if (ringbuf->space < rem) { |
| 1994 | int ret = ring_wait_for_space(ring, rem); |
| 1995 | if (ret) |
| 1996 | return ret; |
| 1997 | } |
| 1998 | |
| 1999 | virt = ringbuf->virtual_start + ringbuf->tail; |
| 2000 | rem /= 4; |
| 2001 | while (rem--) |
| 2002 | iowrite32(MI_NOOP, virt++); |
| 2003 | |
| 2004 | ringbuf->tail = 0; |
| 2005 | ringbuf->space = intel_ring_space(ringbuf); |
| 2006 | |
| 2007 | return 0; |
| 2008 | } |
| 2009 | |
| 2010 | int intel_ring_idle(struct intel_engine_cs *ring) |
| 2011 | { |
| 2012 | struct drm_i915_gem_request *req; |
| 2013 | int ret; |
| 2014 | |
| 2015 | /* We need to add any requests required to flush the objects and ring */ |
| 2016 | if (ring->outstanding_lazy_request) { |
| 2017 | ret = i915_add_request(ring); |
| 2018 | if (ret) |
| 2019 | return ret; |
| 2020 | } |
| 2021 | |
| 2022 | /* Wait upon the last request to be completed */ |
| 2023 | if (list_empty(&ring->request_list)) |
| 2024 | return 0; |
| 2025 | |
| 2026 | req = list_entry(ring->request_list.prev, |
| 2027 | struct drm_i915_gem_request, |
| 2028 | list); |
| 2029 | |
| 2030 | return i915_wait_request(req); |
| 2031 | } |
| 2032 | |
| 2033 | static int |
| 2034 | intel_ring_alloc_request(struct intel_engine_cs *ring) |
| 2035 | { |
| 2036 | int ret; |
| 2037 | struct drm_i915_gem_request *request; |
| 2038 | |
| 2039 | if (ring->outstanding_lazy_request) |
| 2040 | return 0; |
| 2041 | |
| 2042 | request = kmalloc(sizeof(*request), GFP_KERNEL); |
| 2043 | if (request == NULL) |
| 2044 | return -ENOMEM; |
| 2045 | |
| 2046 | kref_init(&request->ref); |
| 2047 | |
| 2048 | ret = i915_gem_get_seqno(ring->dev, &request->seqno); |
| 2049 | if (ret) { |
| 2050 | kfree(request); |
| 2051 | return ret; |
| 2052 | } |
| 2053 | |
| 2054 | ring->outstanding_lazy_request = request; |
| 2055 | return 0; |
| 2056 | } |
| 2057 | |
| 2058 | static int __intel_ring_prepare(struct intel_engine_cs *ring, |
| 2059 | int bytes) |
| 2060 | { |
| 2061 | struct intel_ringbuffer *ringbuf = ring->buffer; |
| 2062 | int ret; |
| 2063 | |
| 2064 | if (unlikely(ringbuf->tail + bytes > ringbuf->effective_size)) { |
| 2065 | ret = intel_wrap_ring_buffer(ring); |
| 2066 | if (unlikely(ret)) |
| 2067 | return ret; |
| 2068 | } |
| 2069 | |
| 2070 | if (unlikely(ringbuf->space < bytes)) { |
| 2071 | ret = ring_wait_for_space(ring, bytes); |
| 2072 | if (unlikely(ret)) |
| 2073 | return ret; |
| 2074 | } |
| 2075 | |
| 2076 | return 0; |
| 2077 | } |
| 2078 | |
| 2079 | int intel_ring_begin(struct intel_engine_cs *ring, |
| 2080 | int num_dwords) |
| 2081 | { |
| 2082 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 2083 | int ret; |
| 2084 | |
| 2085 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, |
| 2086 | dev_priv->mm.interruptible); |
| 2087 | if (ret) |
| 2088 | return ret; |
| 2089 | |
| 2090 | ret = __intel_ring_prepare(ring, num_dwords * sizeof(uint32_t)); |
| 2091 | if (ret) |
| 2092 | return ret; |
| 2093 | |
| 2094 | /* Preallocate the olr before touching the ring */ |
| 2095 | ret = intel_ring_alloc_request(ring); |
| 2096 | if (ret) |
| 2097 | return ret; |
| 2098 | |
| 2099 | ring->buffer->space -= num_dwords * sizeof(uint32_t); |
| 2100 | return 0; |
| 2101 | } |
| 2102 | |
| 2103 | /* Align the ring tail to a cacheline boundary */ |
| 2104 | int intel_ring_cacheline_align(struct intel_engine_cs *ring) |
| 2105 | { |
| 2106 | int num_dwords = (ring->buffer->tail & (CACHELINE_BYTES - 1)) / sizeof(uint32_t); |
| 2107 | int ret; |
| 2108 | |
| 2109 | if (num_dwords == 0) |
| 2110 | return 0; |
| 2111 | |
| 2112 | num_dwords = CACHELINE_BYTES / sizeof(uint32_t) - num_dwords; |
| 2113 | ret = intel_ring_begin(ring, num_dwords); |
| 2114 | if (ret) |
| 2115 | return ret; |
| 2116 | |
| 2117 | while (num_dwords--) |
| 2118 | intel_ring_emit(ring, MI_NOOP); |
| 2119 | |
| 2120 | intel_ring_advance(ring); |
| 2121 | |
| 2122 | return 0; |
| 2123 | } |
| 2124 | |
| 2125 | void intel_ring_init_seqno(struct intel_engine_cs *ring, u32 seqno) |
| 2126 | { |
| 2127 | struct drm_device *dev = ring->dev; |
| 2128 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2129 | |
| 2130 | BUG_ON(ring->outstanding_lazy_request); |
| 2131 | |
| 2132 | if (INTEL_INFO(dev)->gen == 6 || INTEL_INFO(dev)->gen == 7) { |
| 2133 | I915_WRITE(RING_SYNC_0(ring->mmio_base), 0); |
| 2134 | I915_WRITE(RING_SYNC_1(ring->mmio_base), 0); |
| 2135 | if (HAS_VEBOX(dev)) |
| 2136 | I915_WRITE(RING_SYNC_2(ring->mmio_base), 0); |
| 2137 | } |
| 2138 | |
| 2139 | ring->set_seqno(ring, seqno); |
| 2140 | ring->hangcheck.seqno = seqno; |
| 2141 | } |
| 2142 | |
| 2143 | static void gen6_bsd_ring_write_tail(struct intel_engine_cs *ring, |
| 2144 | u32 value) |
| 2145 | { |
| 2146 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 2147 | |
| 2148 | /* Every tail move must follow the sequence below */ |
| 2149 | |
| 2150 | /* Disable notification that the ring is IDLE. The GT |
| 2151 | * will then assume that it is busy and bring it out of rc6. |
| 2152 | */ |
| 2153 | I915_WRITE(GEN6_BSD_SLEEP_PSMI_CONTROL, |
| 2154 | _MASKED_BIT_ENABLE(GEN6_BSD_SLEEP_MSG_DISABLE)); |
| 2155 | |
| 2156 | /* Clear the context id. Here be magic! */ |
| 2157 | I915_WRITE64(GEN6_BSD_RNCID, 0x0); |
| 2158 | |
| 2159 | /* Wait for the ring not to be idle, i.e. for it to wake up. */ |
| 2160 | if (wait_for((I915_READ(GEN6_BSD_SLEEP_PSMI_CONTROL) & |
| 2161 | GEN6_BSD_SLEEP_INDICATOR) == 0, |
| 2162 | 50)) |
| 2163 | DRM_ERROR("timed out waiting for the BSD ring to wake up\n"); |
| 2164 | |
| 2165 | /* Now that the ring is fully powered up, update the tail */ |
| 2166 | I915_WRITE_TAIL(ring, value); |
| 2167 | POSTING_READ(RING_TAIL(ring->mmio_base)); |
| 2168 | |
| 2169 | /* Let the ring send IDLE messages to the GT again, |
| 2170 | * and so let it sleep to conserve power when idle. |
| 2171 | */ |
| 2172 | I915_WRITE(GEN6_BSD_SLEEP_PSMI_CONTROL, |
| 2173 | _MASKED_BIT_DISABLE(GEN6_BSD_SLEEP_MSG_DISABLE)); |
| 2174 | } |
| 2175 | |
| 2176 | static int gen6_bsd_ring_flush(struct intel_engine_cs *ring, |
| 2177 | u32 invalidate, u32 flush) |
| 2178 | { |
| 2179 | uint32_t cmd; |
| 2180 | int ret; |
| 2181 | |
| 2182 | ret = intel_ring_begin(ring, 4); |
| 2183 | if (ret) |
| 2184 | return ret; |
| 2185 | |
| 2186 | cmd = MI_FLUSH_DW; |
| 2187 | if (INTEL_INFO(ring->dev)->gen >= 8) |
| 2188 | cmd += 1; |
| 2189 | /* |
| 2190 | * Bspec vol 1c.5 - video engine command streamer: |
| 2191 | * "If ENABLED, all TLBs will be invalidated once the flush |
| 2192 | * operation is complete. This bit is only valid when the |
| 2193 | * Post-Sync Operation field is a value of 1h or 3h." |
| 2194 | */ |
| 2195 | if (invalidate & I915_GEM_GPU_DOMAINS) |
| 2196 | cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD | |
| 2197 | MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW; |
| 2198 | intel_ring_emit(ring, cmd); |
| 2199 | intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT); |
| 2200 | if (INTEL_INFO(ring->dev)->gen >= 8) { |
| 2201 | intel_ring_emit(ring, 0); /* upper addr */ |
| 2202 | intel_ring_emit(ring, 0); /* value */ |
| 2203 | } else { |
| 2204 | intel_ring_emit(ring, 0); |
| 2205 | intel_ring_emit(ring, MI_NOOP); |
| 2206 | } |
| 2207 | intel_ring_advance(ring); |
| 2208 | return 0; |
| 2209 | } |
| 2210 | |
| 2211 | static int |
| 2212 | gen8_ring_dispatch_execbuffer(struct intel_engine_cs *ring, |
| 2213 | u64 offset, u32 len, |
| 2214 | unsigned flags) |
| 2215 | { |
| 2216 | bool ppgtt = USES_PPGTT(ring->dev) && !(flags & I915_DISPATCH_SECURE); |
| 2217 | int ret; |
| 2218 | |
| 2219 | ret = intel_ring_begin(ring, 4); |
| 2220 | if (ret) |
| 2221 | return ret; |
| 2222 | |
| 2223 | /* FIXME(BDW): Address space and security selectors. */ |
| 2224 | intel_ring_emit(ring, MI_BATCH_BUFFER_START_GEN8 | (ppgtt<<8)); |
| 2225 | intel_ring_emit(ring, lower_32_bits(offset)); |
| 2226 | intel_ring_emit(ring, upper_32_bits(offset)); |
| 2227 | intel_ring_emit(ring, MI_NOOP); |
| 2228 | intel_ring_advance(ring); |
| 2229 | |
| 2230 | return 0; |
| 2231 | } |
| 2232 | |
| 2233 | static int |
| 2234 | hsw_ring_dispatch_execbuffer(struct intel_engine_cs *ring, |
| 2235 | u64 offset, u32 len, |
| 2236 | unsigned flags) |
| 2237 | { |
| 2238 | int ret; |
| 2239 | |
| 2240 | ret = intel_ring_begin(ring, 2); |
| 2241 | if (ret) |
| 2242 | return ret; |
| 2243 | |
| 2244 | intel_ring_emit(ring, |
| 2245 | MI_BATCH_BUFFER_START | |
| 2246 | (flags & I915_DISPATCH_SECURE ? |
| 2247 | 0 : MI_BATCH_PPGTT_HSW | MI_BATCH_NON_SECURE_HSW)); |
| 2248 | /* bit0-7 is the length on GEN6+ */ |
| 2249 | intel_ring_emit(ring, offset); |
| 2250 | intel_ring_advance(ring); |
| 2251 | |
| 2252 | return 0; |
| 2253 | } |
| 2254 | |
| 2255 | static int |
| 2256 | gen6_ring_dispatch_execbuffer(struct intel_engine_cs *ring, |
| 2257 | u64 offset, u32 len, |
| 2258 | unsigned flags) |
| 2259 | { |
| 2260 | int ret; |
| 2261 | |
| 2262 | ret = intel_ring_begin(ring, 2); |
| 2263 | if (ret) |
| 2264 | return ret; |
| 2265 | |
| 2266 | intel_ring_emit(ring, |
| 2267 | MI_BATCH_BUFFER_START | |
| 2268 | (flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE_I965)); |
| 2269 | /* bit0-7 is the length on GEN6+ */ |
| 2270 | intel_ring_emit(ring, offset); |
| 2271 | intel_ring_advance(ring); |
| 2272 | |
| 2273 | return 0; |
| 2274 | } |
| 2275 | |
| 2276 | /* Blitter support (SandyBridge+) */ |
| 2277 | |
| 2278 | static int gen6_ring_flush(struct intel_engine_cs *ring, |
| 2279 | u32 invalidate, u32 flush) |
| 2280 | { |
| 2281 | struct drm_device *dev = ring->dev; |
| 2282 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2283 | uint32_t cmd; |
| 2284 | int ret; |
| 2285 | |
| 2286 | ret = intel_ring_begin(ring, 4); |
| 2287 | if (ret) |
| 2288 | return ret; |
| 2289 | |
| 2290 | cmd = MI_FLUSH_DW; |
| 2291 | if (INTEL_INFO(ring->dev)->gen >= 8) |
| 2292 | cmd += 1; |
| 2293 | /* |
| 2294 | * Bspec vol 1c.3 - blitter engine command streamer: |
| 2295 | * "If ENABLED, all TLBs will be invalidated once the flush |
| 2296 | * operation is complete. This bit is only valid when the |
| 2297 | * Post-Sync Operation field is a value of 1h or 3h." |
| 2298 | */ |
| 2299 | if (invalidate & I915_GEM_DOMAIN_RENDER) |
| 2300 | cmd |= MI_INVALIDATE_TLB | MI_FLUSH_DW_STORE_INDEX | |
| 2301 | MI_FLUSH_DW_OP_STOREDW; |
| 2302 | intel_ring_emit(ring, cmd); |
| 2303 | intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT); |
| 2304 | if (INTEL_INFO(ring->dev)->gen >= 8) { |
| 2305 | intel_ring_emit(ring, 0); /* upper addr */ |
| 2306 | intel_ring_emit(ring, 0); /* value */ |
| 2307 | } else { |
| 2308 | intel_ring_emit(ring, 0); |
| 2309 | intel_ring_emit(ring, MI_NOOP); |
| 2310 | } |
| 2311 | intel_ring_advance(ring); |
| 2312 | |
| 2313 | if (!invalidate && flush) { |
| 2314 | if (IS_GEN7(dev)) |
| 2315 | return gen7_ring_fbc_flush(ring, FBC_REND_CACHE_CLEAN); |
| 2316 | else if (IS_BROADWELL(dev)) |
| 2317 | dev_priv->fbc.need_sw_cache_clean = true; |
| 2318 | } |
| 2319 | |
| 2320 | return 0; |
| 2321 | } |
| 2322 | |
| 2323 | int intel_init_render_ring_buffer(struct drm_device *dev) |
| 2324 | { |
| 2325 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2326 | struct intel_engine_cs *ring = &dev_priv->ring[RCS]; |
| 2327 | struct drm_i915_gem_object *obj; |
| 2328 | int ret; |
| 2329 | |
| 2330 | ring->name = "render ring"; |
| 2331 | ring->id = RCS; |
| 2332 | ring->mmio_base = RENDER_RING_BASE; |
| 2333 | |
| 2334 | if (INTEL_INFO(dev)->gen >= 8) { |
| 2335 | if (i915_semaphore_is_enabled(dev)) { |
| 2336 | obj = i915_gem_alloc_object(dev, 4096); |
| 2337 | if (obj == NULL) { |
| 2338 | DRM_ERROR("Failed to allocate semaphore bo. Disabling semaphores\n"); |
| 2339 | i915.semaphores = 0; |
| 2340 | } else { |
| 2341 | i915_gem_object_set_cache_level(obj, I915_CACHE_LLC); |
| 2342 | ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_NONBLOCK); |
| 2343 | if (ret != 0) { |
| 2344 | drm_gem_object_unreference(&obj->base); |
| 2345 | DRM_ERROR("Failed to pin semaphore bo. Disabling semaphores\n"); |
| 2346 | i915.semaphores = 0; |
| 2347 | } else |
| 2348 | dev_priv->semaphore_obj = obj; |
| 2349 | } |
| 2350 | } |
| 2351 | |
| 2352 | ring->init_context = intel_ring_workarounds_emit; |
| 2353 | ring->add_request = gen6_add_request; |
| 2354 | ring->flush = gen8_render_ring_flush; |
| 2355 | ring->irq_get = gen8_ring_get_irq; |
| 2356 | ring->irq_put = gen8_ring_put_irq; |
| 2357 | ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT; |
| 2358 | ring->get_seqno = gen6_ring_get_seqno; |
| 2359 | ring->set_seqno = ring_set_seqno; |
| 2360 | if (i915_semaphore_is_enabled(dev)) { |
| 2361 | WARN_ON(!dev_priv->semaphore_obj); |
| 2362 | ring->semaphore.sync_to = gen8_ring_sync; |
| 2363 | ring->semaphore.signal = gen8_rcs_signal; |
| 2364 | GEN8_RING_SEMAPHORE_INIT; |
| 2365 | } |
| 2366 | } else if (INTEL_INFO(dev)->gen >= 6) { |
| 2367 | ring->add_request = gen6_add_request; |
| 2368 | ring->flush = gen7_render_ring_flush; |
| 2369 | if (INTEL_INFO(dev)->gen == 6) |
| 2370 | ring->flush = gen6_render_ring_flush; |
| 2371 | ring->irq_get = gen6_ring_get_irq; |
| 2372 | ring->irq_put = gen6_ring_put_irq; |
| 2373 | ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT; |
| 2374 | ring->get_seqno = gen6_ring_get_seqno; |
| 2375 | ring->set_seqno = ring_set_seqno; |
| 2376 | if (i915_semaphore_is_enabled(dev)) { |
| 2377 | ring->semaphore.sync_to = gen6_ring_sync; |
| 2378 | ring->semaphore.signal = gen6_signal; |
| 2379 | /* |
| 2380 | * The current semaphore is only applied on pre-gen8 |
| 2381 | * platform. And there is no VCS2 ring on the pre-gen8 |
| 2382 | * platform. So the semaphore between RCS and VCS2 is |
| 2383 | * initialized as INVALID. Gen8 will initialize the |
| 2384 | * sema between VCS2 and RCS later. |
| 2385 | */ |
| 2386 | ring->semaphore.mbox.wait[RCS] = MI_SEMAPHORE_SYNC_INVALID; |
| 2387 | ring->semaphore.mbox.wait[VCS] = MI_SEMAPHORE_SYNC_RV; |
| 2388 | ring->semaphore.mbox.wait[BCS] = MI_SEMAPHORE_SYNC_RB; |
| 2389 | ring->semaphore.mbox.wait[VECS] = MI_SEMAPHORE_SYNC_RVE; |
| 2390 | ring->semaphore.mbox.wait[VCS2] = MI_SEMAPHORE_SYNC_INVALID; |
| 2391 | ring->semaphore.mbox.signal[RCS] = GEN6_NOSYNC; |
| 2392 | ring->semaphore.mbox.signal[VCS] = GEN6_VRSYNC; |
| 2393 | ring->semaphore.mbox.signal[BCS] = GEN6_BRSYNC; |
| 2394 | ring->semaphore.mbox.signal[VECS] = GEN6_VERSYNC; |
| 2395 | ring->semaphore.mbox.signal[VCS2] = GEN6_NOSYNC; |
| 2396 | } |
| 2397 | } else if (IS_GEN5(dev)) { |
| 2398 | ring->add_request = pc_render_add_request; |
| 2399 | ring->flush = gen4_render_ring_flush; |
| 2400 | ring->get_seqno = pc_render_get_seqno; |
| 2401 | ring->set_seqno = pc_render_set_seqno; |
| 2402 | ring->irq_get = gen5_ring_get_irq; |
| 2403 | ring->irq_put = gen5_ring_put_irq; |
| 2404 | ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT | |
| 2405 | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT; |
| 2406 | } else { |
| 2407 | ring->add_request = i9xx_add_request; |
| 2408 | if (INTEL_INFO(dev)->gen < 4) |
| 2409 | ring->flush = gen2_render_ring_flush; |
| 2410 | else |
| 2411 | ring->flush = gen4_render_ring_flush; |
| 2412 | ring->get_seqno = ring_get_seqno; |
| 2413 | ring->set_seqno = ring_set_seqno; |
| 2414 | if (IS_GEN2(dev)) { |
| 2415 | ring->irq_get = i8xx_ring_get_irq; |
| 2416 | ring->irq_put = i8xx_ring_put_irq; |
| 2417 | } else { |
| 2418 | ring->irq_get = i9xx_ring_get_irq; |
| 2419 | ring->irq_put = i9xx_ring_put_irq; |
| 2420 | } |
| 2421 | ring->irq_enable_mask = I915_USER_INTERRUPT; |
| 2422 | } |
| 2423 | ring->write_tail = ring_write_tail; |
| 2424 | |
| 2425 | if (IS_HASWELL(dev)) |
| 2426 | ring->dispatch_execbuffer = hsw_ring_dispatch_execbuffer; |
| 2427 | else if (IS_GEN8(dev)) |
| 2428 | ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer; |
| 2429 | else if (INTEL_INFO(dev)->gen >= 6) |
| 2430 | ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer; |
| 2431 | else if (INTEL_INFO(dev)->gen >= 4) |
| 2432 | ring->dispatch_execbuffer = i965_dispatch_execbuffer; |
| 2433 | else if (IS_I830(dev) || IS_845G(dev)) |
| 2434 | ring->dispatch_execbuffer = i830_dispatch_execbuffer; |
| 2435 | else |
| 2436 | ring->dispatch_execbuffer = i915_dispatch_execbuffer; |
| 2437 | ring->init = init_render_ring; |
| 2438 | ring->cleanup = render_ring_cleanup; |
| 2439 | |
| 2440 | /* Workaround batchbuffer to combat CS tlb bug. */ |
| 2441 | if (HAS_BROKEN_CS_TLB(dev)) { |
| 2442 | obj = i915_gem_alloc_object(dev, I830_WA_SIZE); |
| 2443 | if (obj == NULL) { |
| 2444 | DRM_ERROR("Failed to allocate batch bo\n"); |
| 2445 | return -ENOMEM; |
| 2446 | } |
| 2447 | |
| 2448 | ret = i915_gem_obj_ggtt_pin(obj, 0, 0); |
| 2449 | if (ret != 0) { |
| 2450 | drm_gem_object_unreference(&obj->base); |
| 2451 | DRM_ERROR("Failed to ping batch bo\n"); |
| 2452 | return ret; |
| 2453 | } |
| 2454 | |
| 2455 | ring->scratch.obj = obj; |
| 2456 | ring->scratch.gtt_offset = i915_gem_obj_ggtt_offset(obj); |
| 2457 | } |
| 2458 | |
| 2459 | return intel_init_ring_buffer(dev, ring); |
| 2460 | } |
| 2461 | |
| 2462 | int intel_init_bsd_ring_buffer(struct drm_device *dev) |
| 2463 | { |
| 2464 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2465 | struct intel_engine_cs *ring = &dev_priv->ring[VCS]; |
| 2466 | |
| 2467 | ring->name = "bsd ring"; |
| 2468 | ring->id = VCS; |
| 2469 | |
| 2470 | ring->write_tail = ring_write_tail; |
| 2471 | if (INTEL_INFO(dev)->gen >= 6) { |
| 2472 | ring->mmio_base = GEN6_BSD_RING_BASE; |
| 2473 | /* gen6 bsd needs a special wa for tail updates */ |
| 2474 | if (IS_GEN6(dev)) |
| 2475 | ring->write_tail = gen6_bsd_ring_write_tail; |
| 2476 | ring->flush = gen6_bsd_ring_flush; |
| 2477 | ring->add_request = gen6_add_request; |
| 2478 | ring->get_seqno = gen6_ring_get_seqno; |
| 2479 | ring->set_seqno = ring_set_seqno; |
| 2480 | if (INTEL_INFO(dev)->gen >= 8) { |
| 2481 | ring->irq_enable_mask = |
| 2482 | GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT; |
| 2483 | ring->irq_get = gen8_ring_get_irq; |
| 2484 | ring->irq_put = gen8_ring_put_irq; |
| 2485 | ring->dispatch_execbuffer = |
| 2486 | gen8_ring_dispatch_execbuffer; |
| 2487 | if (i915_semaphore_is_enabled(dev)) { |
| 2488 | ring->semaphore.sync_to = gen8_ring_sync; |
| 2489 | ring->semaphore.signal = gen8_xcs_signal; |
| 2490 | GEN8_RING_SEMAPHORE_INIT; |
| 2491 | } |
| 2492 | } else { |
| 2493 | ring->irq_enable_mask = GT_BSD_USER_INTERRUPT; |
| 2494 | ring->irq_get = gen6_ring_get_irq; |
| 2495 | ring->irq_put = gen6_ring_put_irq; |
| 2496 | ring->dispatch_execbuffer = |
| 2497 | gen6_ring_dispatch_execbuffer; |
| 2498 | if (i915_semaphore_is_enabled(dev)) { |
| 2499 | ring->semaphore.sync_to = gen6_ring_sync; |
| 2500 | ring->semaphore.signal = gen6_signal; |
| 2501 | ring->semaphore.mbox.wait[RCS] = MI_SEMAPHORE_SYNC_VR; |
| 2502 | ring->semaphore.mbox.wait[VCS] = MI_SEMAPHORE_SYNC_INVALID; |
| 2503 | ring->semaphore.mbox.wait[BCS] = MI_SEMAPHORE_SYNC_VB; |
| 2504 | ring->semaphore.mbox.wait[VECS] = MI_SEMAPHORE_SYNC_VVE; |
| 2505 | ring->semaphore.mbox.wait[VCS2] = MI_SEMAPHORE_SYNC_INVALID; |
| 2506 | ring->semaphore.mbox.signal[RCS] = GEN6_RVSYNC; |
| 2507 | ring->semaphore.mbox.signal[VCS] = GEN6_NOSYNC; |
| 2508 | ring->semaphore.mbox.signal[BCS] = GEN6_BVSYNC; |
| 2509 | ring->semaphore.mbox.signal[VECS] = GEN6_VEVSYNC; |
| 2510 | ring->semaphore.mbox.signal[VCS2] = GEN6_NOSYNC; |
| 2511 | } |
| 2512 | } |
| 2513 | } else { |
| 2514 | ring->mmio_base = BSD_RING_BASE; |
| 2515 | ring->flush = bsd_ring_flush; |
| 2516 | ring->add_request = i9xx_add_request; |
| 2517 | ring->get_seqno = ring_get_seqno; |
| 2518 | ring->set_seqno = ring_set_seqno; |
| 2519 | if (IS_GEN5(dev)) { |
| 2520 | ring->irq_enable_mask = ILK_BSD_USER_INTERRUPT; |
| 2521 | ring->irq_get = gen5_ring_get_irq; |
| 2522 | ring->irq_put = gen5_ring_put_irq; |
| 2523 | } else { |
| 2524 | ring->irq_enable_mask = I915_BSD_USER_INTERRUPT; |
| 2525 | ring->irq_get = i9xx_ring_get_irq; |
| 2526 | ring->irq_put = i9xx_ring_put_irq; |
| 2527 | } |
| 2528 | ring->dispatch_execbuffer = i965_dispatch_execbuffer; |
| 2529 | } |
| 2530 | ring->init = init_ring_common; |
| 2531 | |
| 2532 | return intel_init_ring_buffer(dev, ring); |
| 2533 | } |
| 2534 | |
| 2535 | /** |
| 2536 | * Initialize the second BSD ring for Broadwell GT3. |
| 2537 | * It is noted that this only exists on Broadwell GT3. |
| 2538 | */ |
| 2539 | int intel_init_bsd2_ring_buffer(struct drm_device *dev) |
| 2540 | { |
| 2541 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2542 | struct intel_engine_cs *ring = &dev_priv->ring[VCS2]; |
| 2543 | |
| 2544 | if ((INTEL_INFO(dev)->gen != 8)) { |
| 2545 | DRM_ERROR("No dual-BSD ring on non-BDW machine\n"); |
| 2546 | return -EINVAL; |
| 2547 | } |
| 2548 | |
| 2549 | ring->name = "bsd2 ring"; |
| 2550 | ring->id = VCS2; |
| 2551 | |
| 2552 | ring->write_tail = ring_write_tail; |
| 2553 | ring->mmio_base = GEN8_BSD2_RING_BASE; |
| 2554 | ring->flush = gen6_bsd_ring_flush; |
| 2555 | ring->add_request = gen6_add_request; |
| 2556 | ring->get_seqno = gen6_ring_get_seqno; |
| 2557 | ring->set_seqno = ring_set_seqno; |
| 2558 | ring->irq_enable_mask = |
| 2559 | GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT; |
| 2560 | ring->irq_get = gen8_ring_get_irq; |
| 2561 | ring->irq_put = gen8_ring_put_irq; |
| 2562 | ring->dispatch_execbuffer = |
| 2563 | gen8_ring_dispatch_execbuffer; |
| 2564 | if (i915_semaphore_is_enabled(dev)) { |
| 2565 | ring->semaphore.sync_to = gen8_ring_sync; |
| 2566 | ring->semaphore.signal = gen8_xcs_signal; |
| 2567 | GEN8_RING_SEMAPHORE_INIT; |
| 2568 | } |
| 2569 | ring->init = init_ring_common; |
| 2570 | |
| 2571 | return intel_init_ring_buffer(dev, ring); |
| 2572 | } |
| 2573 | |
| 2574 | int intel_init_blt_ring_buffer(struct drm_device *dev) |
| 2575 | { |
| 2576 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2577 | struct intel_engine_cs *ring = &dev_priv->ring[BCS]; |
| 2578 | |
| 2579 | ring->name = "blitter ring"; |
| 2580 | ring->id = BCS; |
| 2581 | |
| 2582 | ring->mmio_base = BLT_RING_BASE; |
| 2583 | ring->write_tail = ring_write_tail; |
| 2584 | ring->flush = gen6_ring_flush; |
| 2585 | ring->add_request = gen6_add_request; |
| 2586 | ring->get_seqno = gen6_ring_get_seqno; |
| 2587 | ring->set_seqno = ring_set_seqno; |
| 2588 | if (INTEL_INFO(dev)->gen >= 8) { |
| 2589 | ring->irq_enable_mask = |
| 2590 | GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT; |
| 2591 | ring->irq_get = gen8_ring_get_irq; |
| 2592 | ring->irq_put = gen8_ring_put_irq; |
| 2593 | ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer; |
| 2594 | if (i915_semaphore_is_enabled(dev)) { |
| 2595 | ring->semaphore.sync_to = gen8_ring_sync; |
| 2596 | ring->semaphore.signal = gen8_xcs_signal; |
| 2597 | GEN8_RING_SEMAPHORE_INIT; |
| 2598 | } |
| 2599 | } else { |
| 2600 | ring->irq_enable_mask = GT_BLT_USER_INTERRUPT; |
| 2601 | ring->irq_get = gen6_ring_get_irq; |
| 2602 | ring->irq_put = gen6_ring_put_irq; |
| 2603 | ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer; |
| 2604 | if (i915_semaphore_is_enabled(dev)) { |
| 2605 | ring->semaphore.signal = gen6_signal; |
| 2606 | ring->semaphore.sync_to = gen6_ring_sync; |
| 2607 | /* |
| 2608 | * The current semaphore is only applied on pre-gen8 |
| 2609 | * platform. And there is no VCS2 ring on the pre-gen8 |
| 2610 | * platform. So the semaphore between BCS and VCS2 is |
| 2611 | * initialized as INVALID. Gen8 will initialize the |
| 2612 | * sema between BCS and VCS2 later. |
| 2613 | */ |
| 2614 | ring->semaphore.mbox.wait[RCS] = MI_SEMAPHORE_SYNC_BR; |
| 2615 | ring->semaphore.mbox.wait[VCS] = MI_SEMAPHORE_SYNC_BV; |
| 2616 | ring->semaphore.mbox.wait[BCS] = MI_SEMAPHORE_SYNC_INVALID; |
| 2617 | ring->semaphore.mbox.wait[VECS] = MI_SEMAPHORE_SYNC_BVE; |
| 2618 | ring->semaphore.mbox.wait[VCS2] = MI_SEMAPHORE_SYNC_INVALID; |
| 2619 | ring->semaphore.mbox.signal[RCS] = GEN6_RBSYNC; |
| 2620 | ring->semaphore.mbox.signal[VCS] = GEN6_VBSYNC; |
| 2621 | ring->semaphore.mbox.signal[BCS] = GEN6_NOSYNC; |
| 2622 | ring->semaphore.mbox.signal[VECS] = GEN6_VEBSYNC; |
| 2623 | ring->semaphore.mbox.signal[VCS2] = GEN6_NOSYNC; |
| 2624 | } |
| 2625 | } |
| 2626 | ring->init = init_ring_common; |
| 2627 | |
| 2628 | return intel_init_ring_buffer(dev, ring); |
| 2629 | } |
| 2630 | |
| 2631 | int intel_init_vebox_ring_buffer(struct drm_device *dev) |
| 2632 | { |
| 2633 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2634 | struct intel_engine_cs *ring = &dev_priv->ring[VECS]; |
| 2635 | |
| 2636 | ring->name = "video enhancement ring"; |
| 2637 | ring->id = VECS; |
| 2638 | |
| 2639 | ring->mmio_base = VEBOX_RING_BASE; |
| 2640 | ring->write_tail = ring_write_tail; |
| 2641 | ring->flush = gen6_ring_flush; |
| 2642 | ring->add_request = gen6_add_request; |
| 2643 | ring->get_seqno = gen6_ring_get_seqno; |
| 2644 | ring->set_seqno = ring_set_seqno; |
| 2645 | |
| 2646 | if (INTEL_INFO(dev)->gen >= 8) { |
| 2647 | ring->irq_enable_mask = |
| 2648 | GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT; |
| 2649 | ring->irq_get = gen8_ring_get_irq; |
| 2650 | ring->irq_put = gen8_ring_put_irq; |
| 2651 | ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer; |
| 2652 | if (i915_semaphore_is_enabled(dev)) { |
| 2653 | ring->semaphore.sync_to = gen8_ring_sync; |
| 2654 | ring->semaphore.signal = gen8_xcs_signal; |
| 2655 | GEN8_RING_SEMAPHORE_INIT; |
| 2656 | } |
| 2657 | } else { |
| 2658 | ring->irq_enable_mask = PM_VEBOX_USER_INTERRUPT; |
| 2659 | ring->irq_get = hsw_vebox_get_irq; |
| 2660 | ring->irq_put = hsw_vebox_put_irq; |
| 2661 | ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer; |
| 2662 | if (i915_semaphore_is_enabled(dev)) { |
| 2663 | ring->semaphore.sync_to = gen6_ring_sync; |
| 2664 | ring->semaphore.signal = gen6_signal; |
| 2665 | ring->semaphore.mbox.wait[RCS] = MI_SEMAPHORE_SYNC_VER; |
| 2666 | ring->semaphore.mbox.wait[VCS] = MI_SEMAPHORE_SYNC_VEV; |
| 2667 | ring->semaphore.mbox.wait[BCS] = MI_SEMAPHORE_SYNC_VEB; |
| 2668 | ring->semaphore.mbox.wait[VECS] = MI_SEMAPHORE_SYNC_INVALID; |
| 2669 | ring->semaphore.mbox.wait[VCS2] = MI_SEMAPHORE_SYNC_INVALID; |
| 2670 | ring->semaphore.mbox.signal[RCS] = GEN6_RVESYNC; |
| 2671 | ring->semaphore.mbox.signal[VCS] = GEN6_VVESYNC; |
| 2672 | ring->semaphore.mbox.signal[BCS] = GEN6_BVESYNC; |
| 2673 | ring->semaphore.mbox.signal[VECS] = GEN6_NOSYNC; |
| 2674 | ring->semaphore.mbox.signal[VCS2] = GEN6_NOSYNC; |
| 2675 | } |
| 2676 | } |
| 2677 | ring->init = init_ring_common; |
| 2678 | |
| 2679 | return intel_init_ring_buffer(dev, ring); |
| 2680 | } |
| 2681 | |
| 2682 | int |
| 2683 | intel_ring_flush_all_caches(struct intel_engine_cs *ring) |
| 2684 | { |
| 2685 | int ret; |
| 2686 | |
| 2687 | if (!ring->gpu_caches_dirty) |
| 2688 | return 0; |
| 2689 | |
| 2690 | ret = ring->flush(ring, 0, I915_GEM_GPU_DOMAINS); |
| 2691 | if (ret) |
| 2692 | return ret; |
| 2693 | |
| 2694 | trace_i915_gem_ring_flush(ring, 0, I915_GEM_GPU_DOMAINS); |
| 2695 | |
| 2696 | ring->gpu_caches_dirty = false; |
| 2697 | return 0; |
| 2698 | } |
| 2699 | |
| 2700 | int |
| 2701 | intel_ring_invalidate_all_caches(struct intel_engine_cs *ring) |
| 2702 | { |
| 2703 | uint32_t flush_domains; |
| 2704 | int ret; |
| 2705 | |
| 2706 | flush_domains = 0; |
| 2707 | if (ring->gpu_caches_dirty) |
| 2708 | flush_domains = I915_GEM_GPU_DOMAINS; |
| 2709 | |
| 2710 | ret = ring->flush(ring, I915_GEM_GPU_DOMAINS, flush_domains); |
| 2711 | if (ret) |
| 2712 | return ret; |
| 2713 | |
| 2714 | trace_i915_gem_ring_flush(ring, I915_GEM_GPU_DOMAINS, flush_domains); |
| 2715 | |
| 2716 | ring->gpu_caches_dirty = false; |
| 2717 | return 0; |
| 2718 | } |
| 2719 | |
| 2720 | void |
| 2721 | intel_stop_ring_buffer(struct intel_engine_cs *ring) |
| 2722 | { |
| 2723 | int ret; |
| 2724 | |
| 2725 | if (!intel_ring_initialized(ring)) |
| 2726 | return; |
| 2727 | |
| 2728 | ret = intel_ring_idle(ring); |
| 2729 | if (ret && !i915_reset_in_progress(&to_i915(ring->dev)->gpu_error)) |
| 2730 | DRM_ERROR("failed to quiesce %s whilst cleaning up: %d\n", |
| 2731 | ring->name, ret); |
| 2732 | |
| 2733 | stop_ring(ring); |
| 2734 | } |