1 /* 2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved. 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 FROM, 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 * SOFTWARE. 22 * 23 * Authors: 24 * Eddie Dong <eddie.dong@intel.com> 25 * Kevin Tian <kevin.tian@intel.com> 26 * 27 * Contributors: 28 * Zhi Wang <zhi.a.wang@intel.com> 29 * Changbin Du <changbin.du@intel.com> 30 * Zhenyu Wang <zhenyuw@linux.intel.com> 31 * Tina Zhang <tina.zhang@intel.com> 32 * Bing Niu <bing.niu@intel.com> 33 * 34 */ 35 36 #include "i915_drv.h" 37 #include "gvt.h" 38 #include "trace.h" 39 40 /** 41 * Defined in Intel Open Source PRM. 42 * Ref: https://01.org/linuxgraphics/documentation/hardware-specification-prms 43 */ 44 #define TRVATTL3PTRDW(i) _MMIO(0x4de0 + (i)*4) 45 #define TRNULLDETCT _MMIO(0x4de8) 46 #define TRINVTILEDETCT _MMIO(0x4dec) 47 #define TRVADR _MMIO(0x4df0) 48 #define TRTTE _MMIO(0x4df4) 49 #define RING_EXCC(base) _MMIO((base) + 0x28) 50 #define RING_GFX_MODE(base) _MMIO((base) + 0x29c) 51 #define VF_GUARDBAND _MMIO(0x83a4) 52 53 /* Raw offset is appened to each line for convenience. */ 54 static struct engine_mmio gen8_engine_mmio_list[] __cacheline_aligned = { 55 {RCS, GFX_MODE_GEN7, 0xffff, false}, /* 0x229c */ 56 {RCS, GEN9_CTX_PREEMPT_REG, 0x0, false}, /* 0x2248 */ 57 {RCS, HWSTAM, 0x0, false}, /* 0x2098 */ 58 {RCS, INSTPM, 0xffff, true}, /* 0x20c0 */ 59 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 0), 0, false}, /* 0x24d0 */ 60 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 1), 0, false}, /* 0x24d4 */ 61 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 2), 0, false}, /* 0x24d8 */ 62 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 3), 0, false}, /* 0x24dc */ 63 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 4), 0, false}, /* 0x24e0 */ 64 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 5), 0, false}, /* 0x24e4 */ 65 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 6), 0, false}, /* 0x24e8 */ 66 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 7), 0, false}, /* 0x24ec */ 67 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 8), 0, false}, /* 0x24f0 */ 68 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 9), 0, false}, /* 0x24f4 */ 69 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 10), 0, false}, /* 0x24f8 */ 70 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 11), 0, false}, /* 0x24fc */ 71 {RCS, CACHE_MODE_1, 0xffff, true}, /* 0x7004 */ 72 {RCS, GEN7_GT_MODE, 0xffff, true}, /* 0x7008 */ 73 {RCS, CACHE_MODE_0_GEN7, 0xffff, true}, /* 0x7000 */ 74 {RCS, GEN7_COMMON_SLICE_CHICKEN1, 0xffff, true}, /* 0x7010 */ 75 {RCS, HDC_CHICKEN0, 0xffff, true}, /* 0x7300 */ 76 {RCS, VF_GUARDBAND, 0xffff, true}, /* 0x83a4 */ 77 78 {BCS, RING_GFX_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2229c */ 79 {BCS, RING_MI_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2209c */ 80 {BCS, RING_INSTPM(BLT_RING_BASE), 0xffff, false}, /* 0x220c0 */ 81 {BCS, RING_HWSTAM(BLT_RING_BASE), 0x0, false}, /* 0x22098 */ 82 {BCS, RING_EXCC(BLT_RING_BASE), 0x0, false}, /* 0x22028 */ 83 {RCS, INVALID_MMIO_REG, 0, false } /* Terminated */ 84 }; 85 86 static struct engine_mmio gen9_engine_mmio_list[] __cacheline_aligned = { 87 {RCS, GFX_MODE_GEN7, 0xffff, false}, /* 0x229c */ 88 {RCS, GEN9_CTX_PREEMPT_REG, 0x0, false}, /* 0x2248 */ 89 {RCS, HWSTAM, 0x0, false}, /* 0x2098 */ 90 {RCS, INSTPM, 0xffff, true}, /* 0x20c0 */ 91 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 0), 0, false}, /* 0x24d0 */ 92 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 1), 0, false}, /* 0x24d4 */ 93 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 2), 0, false}, /* 0x24d8 */ 94 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 3), 0, false}, /* 0x24dc */ 95 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 4), 0, false}, /* 0x24e0 */ 96 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 5), 0, false}, /* 0x24e4 */ 97 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 6), 0, false}, /* 0x24e8 */ 98 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 7), 0, false}, /* 0x24ec */ 99 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 8), 0, false}, /* 0x24f0 */ 100 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 9), 0, false}, /* 0x24f4 */ 101 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 10), 0, false}, /* 0x24f8 */ 102 {RCS, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 11), 0, false}, /* 0x24fc */ 103 {RCS, CACHE_MODE_1, 0xffff, true}, /* 0x7004 */ 104 {RCS, GEN7_GT_MODE, 0xffff, true}, /* 0x7008 */ 105 {RCS, CACHE_MODE_0_GEN7, 0xffff, true}, /* 0x7000 */ 106 {RCS, GEN7_COMMON_SLICE_CHICKEN1, 0xffff, true}, /* 0x7010 */ 107 {RCS, HDC_CHICKEN0, 0xffff, true}, /* 0x7300 */ 108 {RCS, VF_GUARDBAND, 0xffff, true}, /* 0x83a4 */ 109 110 {RCS, GEN8_PRIVATE_PAT_LO, 0, false}, /* 0x40e0 */ 111 {RCS, GEN8_PRIVATE_PAT_HI, 0, false}, /* 0x40e4 */ 112 {RCS, GEN8_CS_CHICKEN1, 0xffff, true}, /* 0x2580 */ 113 {RCS, COMMON_SLICE_CHICKEN2, 0xffff, true}, /* 0x7014 */ 114 {RCS, GEN9_CS_DEBUG_MODE1, 0xffff, false}, /* 0x20ec */ 115 {RCS, GEN8_L3SQCREG4, 0, false}, /* 0xb118 */ 116 {RCS, GEN7_HALF_SLICE_CHICKEN1, 0xffff, true}, /* 0xe100 */ 117 {RCS, HALF_SLICE_CHICKEN2, 0xffff, true}, /* 0xe180 */ 118 {RCS, HALF_SLICE_CHICKEN3, 0xffff, true}, /* 0xe184 */ 119 {RCS, GEN9_HALF_SLICE_CHICKEN5, 0xffff, true}, /* 0xe188 */ 120 {RCS, GEN9_HALF_SLICE_CHICKEN7, 0xffff, true}, /* 0xe194 */ 121 {RCS, TRVATTL3PTRDW(0), 0, false}, /* 0x4de0 */ 122 {RCS, TRVATTL3PTRDW(1), 0, false}, /* 0x4de4 */ 123 {RCS, TRNULLDETCT, 0, false}, /* 0x4de8 */ 124 {RCS, TRINVTILEDETCT, 0, false}, /* 0x4dec */ 125 {RCS, TRVADR, 0, false}, /* 0x4df0 */ 126 {RCS, TRTTE, 0, false}, /* 0x4df4 */ 127 128 {BCS, RING_GFX_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2229c */ 129 {BCS, RING_MI_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2209c */ 130 {BCS, RING_INSTPM(BLT_RING_BASE), 0xffff, false}, /* 0x220c0 */ 131 {BCS, RING_HWSTAM(BLT_RING_BASE), 0x0, false}, /* 0x22098 */ 132 {BCS, RING_EXCC(BLT_RING_BASE), 0x0, false}, /* 0x22028 */ 133 134 {VCS2, RING_EXCC(GEN8_BSD2_RING_BASE), 0xffff, false}, /* 0x1c028 */ 135 136 {VECS, RING_EXCC(VEBOX_RING_BASE), 0xffff, false}, /* 0x1a028 */ 137 138 {RCS, GEN8_HDC_CHICKEN1, 0xffff, true}, /* 0x7304 */ 139 {RCS, GEN9_CTX_PREEMPT_REG, 0x0, false}, /* 0x2248 */ 140 {RCS, GEN7_UCGCTL4, 0x0, false}, /* 0x940c */ 141 {RCS, GAMT_CHKN_BIT_REG, 0x0, false}, /* 0x4ab8 */ 142 143 {RCS, GEN9_GAMT_ECO_REG_RW_IA, 0x0, false}, /* 0x4ab0 */ 144 {RCS, GEN9_CSFE_CHICKEN1_RCS, 0x0, false}, /* 0x20d4 */ 145 146 {RCS, GEN8_GARBCNTL, 0x0, false}, /* 0xb004 */ 147 {RCS, GEN7_FF_THREAD_MODE, 0x0, false}, /* 0x20a0 */ 148 {RCS, FF_SLICE_CS_CHICKEN2, 0xffff, false}, /* 0x20e4 */ 149 {RCS, INVALID_MMIO_REG, 0, false } /* Terminated */ 150 }; 151 152 static struct { 153 bool initialized; 154 u32 control_table[I915_NUM_ENGINES][64]; 155 u32 l3cc_table[32]; 156 } gen9_render_mocs; 157 158 static void load_render_mocs(struct drm_i915_private *dev_priv) 159 { 160 i915_reg_t offset; 161 u32 regs[] = { 162 [RCS] = 0xc800, 163 [VCS] = 0xc900, 164 [VCS2] = 0xca00, 165 [BCS] = 0xcc00, 166 [VECS] = 0xcb00, 167 }; 168 int ring_id, i; 169 170 for (ring_id = 0; ring_id < ARRAY_SIZE(regs); ring_id++) { 171 offset.reg = regs[ring_id]; 172 for (i = 0; i < 64; i++) { 173 gen9_render_mocs.control_table[ring_id][i] = 174 I915_READ_FW(offset); 175 offset.reg += 4; 176 } 177 } 178 179 offset.reg = 0xb020; 180 for (i = 0; i < 32; i++) { 181 gen9_render_mocs.l3cc_table[i] = 182 I915_READ_FW(offset); 183 offset.reg += 4; 184 } 185 gen9_render_mocs.initialized = true; 186 } 187 188 static void handle_tlb_pending_event(struct intel_vgpu *vgpu, int ring_id) 189 { 190 struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; 191 struct intel_vgpu_submission *s = &vgpu->submission; 192 enum forcewake_domains fw; 193 i915_reg_t reg; 194 u32 regs[] = { 195 [RCS] = 0x4260, 196 [VCS] = 0x4264, 197 [VCS2] = 0x4268, 198 [BCS] = 0x426c, 199 [VECS] = 0x4270, 200 }; 201 202 if (WARN_ON(ring_id >= ARRAY_SIZE(regs))) 203 return; 204 205 if (!test_and_clear_bit(ring_id, (void *)s->tlb_handle_pending)) 206 return; 207 208 reg = _MMIO(regs[ring_id]); 209 210 /* WaForceWakeRenderDuringMmioTLBInvalidate:skl 211 * we need to put a forcewake when invalidating RCS TLB caches, 212 * otherwise device can go to RC6 state and interrupt invalidation 213 * process 214 */ 215 fw = intel_uncore_forcewake_for_reg(dev_priv, reg, 216 FW_REG_READ | FW_REG_WRITE); 217 if (ring_id == RCS && (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))) 218 fw |= FORCEWAKE_RENDER; 219 220 intel_uncore_forcewake_get(dev_priv, fw); 221 222 I915_WRITE_FW(reg, 0x1); 223 224 if (wait_for_atomic((I915_READ_FW(reg) == 0), 50)) 225 gvt_vgpu_err("timeout in invalidate ring (%d) tlb\n", ring_id); 226 else 227 vgpu_vreg_t(vgpu, reg) = 0; 228 229 intel_uncore_forcewake_put(dev_priv, fw); 230 231 gvt_dbg_core("invalidate TLB for ring %d\n", ring_id); 232 } 233 234 static void switch_mocs(struct intel_vgpu *pre, struct intel_vgpu *next, 235 int ring_id) 236 { 237 struct drm_i915_private *dev_priv; 238 i915_reg_t offset, l3_offset; 239 u32 old_v, new_v; 240 241 u32 regs[] = { 242 [RCS] = 0xc800, 243 [VCS] = 0xc900, 244 [VCS2] = 0xca00, 245 [BCS] = 0xcc00, 246 [VECS] = 0xcb00, 247 }; 248 int i; 249 250 dev_priv = pre ? pre->gvt->dev_priv : next->gvt->dev_priv; 251 if (WARN_ON(ring_id >= ARRAY_SIZE(regs))) 252 return; 253 254 if (!pre && !gen9_render_mocs.initialized) 255 load_render_mocs(dev_priv); 256 257 offset.reg = regs[ring_id]; 258 for (i = 0; i < 64; i++) { 259 if (pre) 260 old_v = vgpu_vreg_t(pre, offset); 261 else 262 old_v = gen9_render_mocs.control_table[ring_id][i]; 263 if (next) 264 new_v = vgpu_vreg_t(next, offset); 265 else 266 new_v = gen9_render_mocs.control_table[ring_id][i]; 267 268 if (old_v != new_v) 269 I915_WRITE_FW(offset, new_v); 270 271 offset.reg += 4; 272 } 273 274 if (ring_id == RCS) { 275 l3_offset.reg = 0xb020; 276 for (i = 0; i < 32; i++) { 277 if (pre) 278 old_v = vgpu_vreg_t(pre, l3_offset); 279 else 280 old_v = gen9_render_mocs.l3cc_table[i]; 281 if (next) 282 new_v = vgpu_vreg_t(next, l3_offset); 283 else 284 new_v = gen9_render_mocs.l3cc_table[i]; 285 286 if (old_v != new_v) 287 I915_WRITE_FW(l3_offset, new_v); 288 289 l3_offset.reg += 4; 290 } 291 } 292 } 293 294 #define CTX_CONTEXT_CONTROL_VAL 0x03 295 296 /* Switch ring mmio values (context). */ 297 static void switch_mmio(struct intel_vgpu *pre, 298 struct intel_vgpu *next, 299 int ring_id) 300 { 301 struct drm_i915_private *dev_priv; 302 struct intel_vgpu_submission *s; 303 u32 *reg_state, ctx_ctrl; 304 u32 inhibit_mask = 305 _MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT); 306 struct engine_mmio *mmio; 307 u32 old_v, new_v; 308 309 dev_priv = pre ? pre->gvt->dev_priv : next->gvt->dev_priv; 310 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) 311 switch_mocs(pre, next, ring_id); 312 313 for (mmio = dev_priv->gvt->engine_mmio_list; 314 i915_mmio_reg_valid(mmio->reg); mmio++) { 315 if (mmio->ring_id != ring_id) 316 continue; 317 // save 318 if (pre) { 319 vgpu_vreg_t(pre, mmio->reg) = I915_READ_FW(mmio->reg); 320 if (mmio->mask) 321 vgpu_vreg_t(pre, mmio->reg) &= 322 ~(mmio->mask << 16); 323 old_v = vgpu_vreg_t(pre, mmio->reg); 324 } else 325 old_v = mmio->value = I915_READ_FW(mmio->reg); 326 327 // restore 328 if (next) { 329 s = &next->submission; 330 reg_state = 331 s->shadow_ctx->engine[ring_id].lrc_reg_state; 332 ctx_ctrl = reg_state[CTX_CONTEXT_CONTROL_VAL]; 333 /* 334 * if it is an inhibit context, load in_context mmio 335 * into HW by mmio write. If it is not, skip this mmio 336 * write. 337 */ 338 if (mmio->in_context && 339 (ctx_ctrl & inhibit_mask) != inhibit_mask) 340 continue; 341 342 if (mmio->mask) 343 new_v = vgpu_vreg_t(next, mmio->reg) | 344 (mmio->mask << 16); 345 else 346 new_v = vgpu_vreg_t(next, mmio->reg); 347 } else { 348 if (mmio->in_context) 349 continue; 350 if (mmio->mask) 351 new_v = mmio->value | (mmio->mask << 16); 352 else 353 new_v = mmio->value; 354 } 355 356 I915_WRITE_FW(mmio->reg, new_v); 357 358 trace_render_mmio(pre ? pre->id : 0, 359 next ? next->id : 0, 360 "switch", 361 i915_mmio_reg_offset(mmio->reg), 362 old_v, new_v); 363 } 364 365 if (next) 366 handle_tlb_pending_event(next, ring_id); 367 } 368 369 /** 370 * intel_gvt_switch_render_mmio - switch mmio context of specific engine 371 * @pre: the last vGPU that own the engine 372 * @next: the vGPU to switch to 373 * @ring_id: specify the engine 374 * 375 * If pre is null indicates that host own the engine. If next is null 376 * indicates that we are switching to host workload. 377 */ 378 void intel_gvt_switch_mmio(struct intel_vgpu *pre, 379 struct intel_vgpu *next, int ring_id) 380 { 381 struct drm_i915_private *dev_priv; 382 383 if (WARN_ON(!pre && !next)) 384 return; 385 386 gvt_dbg_render("switch ring %d from %s to %s\n", ring_id, 387 pre ? "vGPU" : "host", next ? "vGPU" : "HOST"); 388 389 dev_priv = pre ? pre->gvt->dev_priv : next->gvt->dev_priv; 390 391 /** 392 * We are using raw mmio access wrapper to improve the 393 * performace for batch mmio read/write, so we need 394 * handle forcewake mannually. 395 */ 396 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); 397 switch_mmio(pre, next, ring_id); 398 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); 399 } 400 401 /** 402 * intel_gvt_init_engine_mmio_context - Initiate the engine mmio list 403 * @gvt: GVT device 404 * 405 */ 406 void intel_gvt_init_engine_mmio_context(struct intel_gvt *gvt) 407 { 408 if (IS_SKYLAKE(gvt->dev_priv) || IS_KABYLAKE(gvt->dev_priv)) 409 gvt->engine_mmio_list = gen9_engine_mmio_list; 410 else 411 gvt->engine_mmio_list = gen8_engine_mmio_list; 412 } 413