1 /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*- 2 */ 3 /* 4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR 23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 */ 28 29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31 #include <linux/slab.h> 32 #include <linux/sysrq.h> 33 34 #include <drm/drm_drv.h> 35 36 #include "display/intel_display_irq.h" 37 #include "display/intel_display_types.h" 38 #include "display/intel_hotplug.h" 39 #include "display/intel_hotplug_irq.h" 40 #include "display/intel_lpe_audio.h" 41 #include "display/intel_psr_regs.h" 42 43 #include "gt/intel_breadcrumbs.h" 44 #include "gt/intel_gt.h" 45 #include "gt/intel_gt_irq.h" 46 #include "gt/intel_gt_pm_irq.h" 47 #include "gt/intel_gt_regs.h" 48 #include "gt/intel_rps.h" 49 50 #include "i915_driver.h" 51 #include "i915_drv.h" 52 #include "i915_irq.h" 53 #include "i915_reg.h" 54 55 /** 56 * DOC: interrupt handling 57 * 58 * These functions provide the basic support for enabling and disabling the 59 * interrupt handling support. There's a lot more functionality in i915_irq.c 60 * and related files, but that will be described in separate chapters. 61 */ 62 63 /* 64 * Interrupt statistic for PMU. Increments the counter only if the 65 * interrupt originated from the GPU so interrupts from a device which 66 * shares the interrupt line are not accounted. 67 */ 68 static inline void pmu_irq_stats(struct drm_i915_private *i915, 69 irqreturn_t res) 70 { 71 if (unlikely(res != IRQ_HANDLED)) 72 return; 73 74 /* 75 * A clever compiler translates that into INC. A not so clever one 76 * should at least prevent store tearing. 77 */ 78 WRITE_ONCE(i915->pmu.irq_count, i915->pmu.irq_count + 1); 79 } 80 81 void gen3_irq_reset(struct intel_uncore *uncore, i915_reg_t imr, 82 i915_reg_t iir, i915_reg_t ier) 83 { 84 intel_uncore_write(uncore, imr, 0xffffffff); 85 intel_uncore_posting_read(uncore, imr); 86 87 intel_uncore_write(uncore, ier, 0); 88 89 /* IIR can theoretically queue up two events. Be paranoid. */ 90 intel_uncore_write(uncore, iir, 0xffffffff); 91 intel_uncore_posting_read(uncore, iir); 92 intel_uncore_write(uncore, iir, 0xffffffff); 93 intel_uncore_posting_read(uncore, iir); 94 } 95 96 static void gen2_irq_reset(struct intel_uncore *uncore) 97 { 98 intel_uncore_write16(uncore, GEN2_IMR, 0xffff); 99 intel_uncore_posting_read16(uncore, GEN2_IMR); 100 101 intel_uncore_write16(uncore, GEN2_IER, 0); 102 103 /* IIR can theoretically queue up two events. Be paranoid. */ 104 intel_uncore_write16(uncore, GEN2_IIR, 0xffff); 105 intel_uncore_posting_read16(uncore, GEN2_IIR); 106 intel_uncore_write16(uncore, GEN2_IIR, 0xffff); 107 intel_uncore_posting_read16(uncore, GEN2_IIR); 108 } 109 110 /* 111 * We should clear IMR at preinstall/uninstall, and just check at postinstall. 112 */ 113 void gen3_assert_iir_is_zero(struct intel_uncore *uncore, i915_reg_t reg) 114 { 115 u32 val = intel_uncore_read(uncore, reg); 116 117 if (val == 0) 118 return; 119 120 drm_WARN(&uncore->i915->drm, 1, 121 "Interrupt register 0x%x is not zero: 0x%08x\n", 122 i915_mmio_reg_offset(reg), val); 123 intel_uncore_write(uncore, reg, 0xffffffff); 124 intel_uncore_posting_read(uncore, reg); 125 intel_uncore_write(uncore, reg, 0xffffffff); 126 intel_uncore_posting_read(uncore, reg); 127 } 128 129 static void gen2_assert_iir_is_zero(struct intel_uncore *uncore) 130 { 131 u16 val = intel_uncore_read16(uncore, GEN2_IIR); 132 133 if (val == 0) 134 return; 135 136 drm_WARN(&uncore->i915->drm, 1, 137 "Interrupt register 0x%x is not zero: 0x%08x\n", 138 i915_mmio_reg_offset(GEN2_IIR), val); 139 intel_uncore_write16(uncore, GEN2_IIR, 0xffff); 140 intel_uncore_posting_read16(uncore, GEN2_IIR); 141 intel_uncore_write16(uncore, GEN2_IIR, 0xffff); 142 intel_uncore_posting_read16(uncore, GEN2_IIR); 143 } 144 145 void gen3_irq_init(struct intel_uncore *uncore, 146 i915_reg_t imr, u32 imr_val, 147 i915_reg_t ier, u32 ier_val, 148 i915_reg_t iir) 149 { 150 gen3_assert_iir_is_zero(uncore, iir); 151 152 intel_uncore_write(uncore, ier, ier_val); 153 intel_uncore_write(uncore, imr, imr_val); 154 intel_uncore_posting_read(uncore, imr); 155 } 156 157 static void gen2_irq_init(struct intel_uncore *uncore, 158 u32 imr_val, u32 ier_val) 159 { 160 gen2_assert_iir_is_zero(uncore); 161 162 intel_uncore_write16(uncore, GEN2_IER, ier_val); 163 intel_uncore_write16(uncore, GEN2_IMR, imr_val); 164 intel_uncore_posting_read16(uncore, GEN2_IMR); 165 } 166 167 /** 168 * ivb_parity_work - Workqueue called when a parity error interrupt 169 * occurred. 170 * @work: workqueue struct 171 * 172 * Doesn't actually do anything except notify userspace. As a consequence of 173 * this event, userspace should try to remap the bad rows since statistically 174 * it is likely the same row is more likely to go bad again. 175 */ 176 static void ivb_parity_work(struct work_struct *work) 177 { 178 struct drm_i915_private *dev_priv = 179 container_of(work, typeof(*dev_priv), l3_parity.error_work); 180 struct intel_gt *gt = to_gt(dev_priv); 181 u32 error_status, row, bank, subbank; 182 char *parity_event[6]; 183 u32 misccpctl; 184 u8 slice = 0; 185 186 /* We must turn off DOP level clock gating to access the L3 registers. 187 * In order to prevent a get/put style interface, acquire struct mutex 188 * any time we access those registers. 189 */ 190 mutex_lock(&dev_priv->drm.struct_mutex); 191 192 /* If we've screwed up tracking, just let the interrupt fire again */ 193 if (drm_WARN_ON(&dev_priv->drm, !dev_priv->l3_parity.which_slice)) 194 goto out; 195 196 misccpctl = intel_uncore_rmw(&dev_priv->uncore, GEN7_MISCCPCTL, 197 GEN7_DOP_CLOCK_GATE_ENABLE, 0); 198 intel_uncore_posting_read(&dev_priv->uncore, GEN7_MISCCPCTL); 199 200 while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) { 201 i915_reg_t reg; 202 203 slice--; 204 if (drm_WARN_ON_ONCE(&dev_priv->drm, 205 slice >= NUM_L3_SLICES(dev_priv))) 206 break; 207 208 dev_priv->l3_parity.which_slice &= ~(1<<slice); 209 210 reg = GEN7_L3CDERRST1(slice); 211 212 error_status = intel_uncore_read(&dev_priv->uncore, reg); 213 row = GEN7_PARITY_ERROR_ROW(error_status); 214 bank = GEN7_PARITY_ERROR_BANK(error_status); 215 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status); 216 217 intel_uncore_write(&dev_priv->uncore, reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE); 218 intel_uncore_posting_read(&dev_priv->uncore, reg); 219 220 parity_event[0] = I915_L3_PARITY_UEVENT "=1"; 221 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row); 222 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank); 223 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank); 224 parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d", slice); 225 parity_event[5] = NULL; 226 227 kobject_uevent_env(&dev_priv->drm.primary->kdev->kobj, 228 KOBJ_CHANGE, parity_event); 229 230 drm_dbg(&dev_priv->drm, 231 "Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n", 232 slice, row, bank, subbank); 233 234 kfree(parity_event[4]); 235 kfree(parity_event[3]); 236 kfree(parity_event[2]); 237 kfree(parity_event[1]); 238 } 239 240 intel_uncore_write(&dev_priv->uncore, GEN7_MISCCPCTL, misccpctl); 241 242 out: 243 drm_WARN_ON(&dev_priv->drm, dev_priv->l3_parity.which_slice); 244 spin_lock_irq(gt->irq_lock); 245 gen5_gt_enable_irq(gt, GT_PARITY_ERROR(dev_priv)); 246 spin_unlock_irq(gt->irq_lock); 247 248 mutex_unlock(&dev_priv->drm.struct_mutex); 249 } 250 251 static irqreturn_t valleyview_irq_handler(int irq, void *arg) 252 { 253 struct drm_i915_private *dev_priv = arg; 254 irqreturn_t ret = IRQ_NONE; 255 256 if (!intel_irqs_enabled(dev_priv)) 257 return IRQ_NONE; 258 259 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 260 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 261 262 do { 263 u32 iir, gt_iir, pm_iir; 264 u32 pipe_stats[I915_MAX_PIPES] = {}; 265 u32 hotplug_status = 0; 266 u32 ier = 0; 267 268 gt_iir = intel_uncore_read(&dev_priv->uncore, GTIIR); 269 pm_iir = intel_uncore_read(&dev_priv->uncore, GEN6_PMIIR); 270 iir = intel_uncore_read(&dev_priv->uncore, VLV_IIR); 271 272 if (gt_iir == 0 && pm_iir == 0 && iir == 0) 273 break; 274 275 ret = IRQ_HANDLED; 276 277 /* 278 * Theory on interrupt generation, based on empirical evidence: 279 * 280 * x = ((VLV_IIR & VLV_IER) || 281 * (((GT_IIR & GT_IER) || (GEN6_PMIIR & GEN6_PMIER)) && 282 * (VLV_MASTER_IER & MASTER_INTERRUPT_ENABLE))); 283 * 284 * A CPU interrupt will only be raised when 'x' has a 0->1 edge. 285 * Hence we clear MASTER_INTERRUPT_ENABLE and VLV_IER to 286 * guarantee the CPU interrupt will be raised again even if we 287 * don't end up clearing all the VLV_IIR, GT_IIR, GEN6_PMIIR 288 * bits this time around. 289 */ 290 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, 0); 291 ier = intel_uncore_rmw(&dev_priv->uncore, VLV_IER, ~0, 0); 292 293 if (gt_iir) 294 intel_uncore_write(&dev_priv->uncore, GTIIR, gt_iir); 295 if (pm_iir) 296 intel_uncore_write(&dev_priv->uncore, GEN6_PMIIR, pm_iir); 297 298 if (iir & I915_DISPLAY_PORT_INTERRUPT) 299 hotplug_status = i9xx_hpd_irq_ack(dev_priv); 300 301 /* Call regardless, as some status bits might not be 302 * signalled in iir */ 303 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 304 305 if (iir & (I915_LPE_PIPE_A_INTERRUPT | 306 I915_LPE_PIPE_B_INTERRUPT)) 307 intel_lpe_audio_irq_handler(dev_priv); 308 309 /* 310 * VLV_IIR is single buffered, and reflects the level 311 * from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last. 312 */ 313 if (iir) 314 intel_uncore_write(&dev_priv->uncore, VLV_IIR, iir); 315 316 intel_uncore_write(&dev_priv->uncore, VLV_IER, ier); 317 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE); 318 319 if (gt_iir) 320 gen6_gt_irq_handler(to_gt(dev_priv), gt_iir); 321 if (pm_iir) 322 gen6_rps_irq_handler(&to_gt(dev_priv)->rps, pm_iir); 323 324 if (hotplug_status) 325 i9xx_hpd_irq_handler(dev_priv, hotplug_status); 326 327 valleyview_pipestat_irq_handler(dev_priv, pipe_stats); 328 } while (0); 329 330 pmu_irq_stats(dev_priv, ret); 331 332 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 333 334 return ret; 335 } 336 337 static irqreturn_t cherryview_irq_handler(int irq, void *arg) 338 { 339 struct drm_i915_private *dev_priv = arg; 340 irqreturn_t ret = IRQ_NONE; 341 342 if (!intel_irqs_enabled(dev_priv)) 343 return IRQ_NONE; 344 345 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 346 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 347 348 do { 349 u32 master_ctl, iir; 350 u32 pipe_stats[I915_MAX_PIPES] = {}; 351 u32 hotplug_status = 0; 352 u32 ier = 0; 353 354 master_ctl = intel_uncore_read(&dev_priv->uncore, GEN8_MASTER_IRQ) & ~GEN8_MASTER_IRQ_CONTROL; 355 iir = intel_uncore_read(&dev_priv->uncore, VLV_IIR); 356 357 if (master_ctl == 0 && iir == 0) 358 break; 359 360 ret = IRQ_HANDLED; 361 362 /* 363 * Theory on interrupt generation, based on empirical evidence: 364 * 365 * x = ((VLV_IIR & VLV_IER) || 366 * ((GEN8_MASTER_IRQ & ~GEN8_MASTER_IRQ_CONTROL) && 367 * (GEN8_MASTER_IRQ & GEN8_MASTER_IRQ_CONTROL))); 368 * 369 * A CPU interrupt will only be raised when 'x' has a 0->1 edge. 370 * Hence we clear GEN8_MASTER_IRQ_CONTROL and VLV_IER to 371 * guarantee the CPU interrupt will be raised again even if we 372 * don't end up clearing all the VLV_IIR and GEN8_MASTER_IRQ_CONTROL 373 * bits this time around. 374 */ 375 intel_uncore_write(&dev_priv->uncore, GEN8_MASTER_IRQ, 0); 376 ier = intel_uncore_rmw(&dev_priv->uncore, VLV_IER, ~0, 0); 377 378 gen8_gt_irq_handler(to_gt(dev_priv), master_ctl); 379 380 if (iir & I915_DISPLAY_PORT_INTERRUPT) 381 hotplug_status = i9xx_hpd_irq_ack(dev_priv); 382 383 /* Call regardless, as some status bits might not be 384 * signalled in iir */ 385 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 386 387 if (iir & (I915_LPE_PIPE_A_INTERRUPT | 388 I915_LPE_PIPE_B_INTERRUPT | 389 I915_LPE_PIPE_C_INTERRUPT)) 390 intel_lpe_audio_irq_handler(dev_priv); 391 392 /* 393 * VLV_IIR is single buffered, and reflects the level 394 * from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last. 395 */ 396 if (iir) 397 intel_uncore_write(&dev_priv->uncore, VLV_IIR, iir); 398 399 intel_uncore_write(&dev_priv->uncore, VLV_IER, ier); 400 intel_uncore_write(&dev_priv->uncore, GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL); 401 402 if (hotplug_status) 403 i9xx_hpd_irq_handler(dev_priv, hotplug_status); 404 405 valleyview_pipestat_irq_handler(dev_priv, pipe_stats); 406 } while (0); 407 408 pmu_irq_stats(dev_priv, ret); 409 410 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 411 412 return ret; 413 } 414 415 /* 416 * To handle irqs with the minimum potential races with fresh interrupts, we: 417 * 1 - Disable Master Interrupt Control. 418 * 2 - Find the source(s) of the interrupt. 419 * 3 - Clear the Interrupt Identity bits (IIR). 420 * 4 - Process the interrupt(s) that had bits set in the IIRs. 421 * 5 - Re-enable Master Interrupt Control. 422 */ 423 static irqreturn_t ilk_irq_handler(int irq, void *arg) 424 { 425 struct drm_i915_private *i915 = arg; 426 void __iomem * const regs = intel_uncore_regs(&i915->uncore); 427 u32 de_iir, gt_iir, de_ier, sde_ier = 0; 428 irqreturn_t ret = IRQ_NONE; 429 430 if (unlikely(!intel_irqs_enabled(i915))) 431 return IRQ_NONE; 432 433 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 434 disable_rpm_wakeref_asserts(&i915->runtime_pm); 435 436 /* disable master interrupt before clearing iir */ 437 de_ier = raw_reg_read(regs, DEIER); 438 raw_reg_write(regs, DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); 439 440 /* Disable south interrupts. We'll only write to SDEIIR once, so further 441 * interrupts will will be stored on its back queue, and then we'll be 442 * able to process them after we restore SDEIER (as soon as we restore 443 * it, we'll get an interrupt if SDEIIR still has something to process 444 * due to its back queue). */ 445 if (!HAS_PCH_NOP(i915)) { 446 sde_ier = raw_reg_read(regs, SDEIER); 447 raw_reg_write(regs, SDEIER, 0); 448 } 449 450 /* Find, clear, then process each source of interrupt */ 451 452 gt_iir = raw_reg_read(regs, GTIIR); 453 if (gt_iir) { 454 raw_reg_write(regs, GTIIR, gt_iir); 455 if (GRAPHICS_VER(i915) >= 6) 456 gen6_gt_irq_handler(to_gt(i915), gt_iir); 457 else 458 gen5_gt_irq_handler(to_gt(i915), gt_iir); 459 ret = IRQ_HANDLED; 460 } 461 462 de_iir = raw_reg_read(regs, DEIIR); 463 if (de_iir) { 464 raw_reg_write(regs, DEIIR, de_iir); 465 if (DISPLAY_VER(i915) >= 7) 466 ivb_display_irq_handler(i915, de_iir); 467 else 468 ilk_display_irq_handler(i915, de_iir); 469 ret = IRQ_HANDLED; 470 } 471 472 if (GRAPHICS_VER(i915) >= 6) { 473 u32 pm_iir = raw_reg_read(regs, GEN6_PMIIR); 474 if (pm_iir) { 475 raw_reg_write(regs, GEN6_PMIIR, pm_iir); 476 gen6_rps_irq_handler(&to_gt(i915)->rps, pm_iir); 477 ret = IRQ_HANDLED; 478 } 479 } 480 481 raw_reg_write(regs, DEIER, de_ier); 482 if (sde_ier) 483 raw_reg_write(regs, SDEIER, sde_ier); 484 485 pmu_irq_stats(i915, ret); 486 487 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 488 enable_rpm_wakeref_asserts(&i915->runtime_pm); 489 490 return ret; 491 } 492 493 static inline u32 gen8_master_intr_disable(void __iomem * const regs) 494 { 495 raw_reg_write(regs, GEN8_MASTER_IRQ, 0); 496 497 /* 498 * Now with master disabled, get a sample of level indications 499 * for this interrupt. Indications will be cleared on related acks. 500 * New indications can and will light up during processing, 501 * and will generate new interrupt after enabling master. 502 */ 503 return raw_reg_read(regs, GEN8_MASTER_IRQ); 504 } 505 506 static inline void gen8_master_intr_enable(void __iomem * const regs) 507 { 508 raw_reg_write(regs, GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL); 509 } 510 511 static irqreturn_t gen8_irq_handler(int irq, void *arg) 512 { 513 struct drm_i915_private *dev_priv = arg; 514 void __iomem * const regs = intel_uncore_regs(&dev_priv->uncore); 515 u32 master_ctl; 516 517 if (!intel_irqs_enabled(dev_priv)) 518 return IRQ_NONE; 519 520 master_ctl = gen8_master_intr_disable(regs); 521 if (!master_ctl) { 522 gen8_master_intr_enable(regs); 523 return IRQ_NONE; 524 } 525 526 /* Find, queue (onto bottom-halves), then clear each source */ 527 gen8_gt_irq_handler(to_gt(dev_priv), master_ctl); 528 529 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 530 if (master_ctl & ~GEN8_GT_IRQS) { 531 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 532 gen8_de_irq_handler(dev_priv, master_ctl); 533 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 534 } 535 536 gen8_master_intr_enable(regs); 537 538 pmu_irq_stats(dev_priv, IRQ_HANDLED); 539 540 return IRQ_HANDLED; 541 } 542 543 static inline u32 gen11_master_intr_disable(void __iomem * const regs) 544 { 545 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, 0); 546 547 /* 548 * Now with master disabled, get a sample of level indications 549 * for this interrupt. Indications will be cleared on related acks. 550 * New indications can and will light up during processing, 551 * and will generate new interrupt after enabling master. 552 */ 553 return raw_reg_read(regs, GEN11_GFX_MSTR_IRQ); 554 } 555 556 static inline void gen11_master_intr_enable(void __iomem * const regs) 557 { 558 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, GEN11_MASTER_IRQ); 559 } 560 561 static irqreturn_t gen11_irq_handler(int irq, void *arg) 562 { 563 struct drm_i915_private *i915 = arg; 564 void __iomem * const regs = intel_uncore_regs(&i915->uncore); 565 struct intel_gt *gt = to_gt(i915); 566 u32 master_ctl; 567 u32 gu_misc_iir; 568 569 if (!intel_irqs_enabled(i915)) 570 return IRQ_NONE; 571 572 master_ctl = gen11_master_intr_disable(regs); 573 if (!master_ctl) { 574 gen11_master_intr_enable(regs); 575 return IRQ_NONE; 576 } 577 578 /* Find, queue (onto bottom-halves), then clear each source */ 579 gen11_gt_irq_handler(gt, master_ctl); 580 581 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 582 if (master_ctl & GEN11_DISPLAY_IRQ) 583 gen11_display_irq_handler(i915); 584 585 gu_misc_iir = gen11_gu_misc_irq_ack(i915, master_ctl); 586 587 gen11_master_intr_enable(regs); 588 589 gen11_gu_misc_irq_handler(i915, gu_misc_iir); 590 591 pmu_irq_stats(i915, IRQ_HANDLED); 592 593 return IRQ_HANDLED; 594 } 595 596 static inline u32 dg1_master_intr_disable(void __iomem * const regs) 597 { 598 u32 val; 599 600 /* First disable interrupts */ 601 raw_reg_write(regs, DG1_MSTR_TILE_INTR, 0); 602 603 /* Get the indication levels and ack the master unit */ 604 val = raw_reg_read(regs, DG1_MSTR_TILE_INTR); 605 if (unlikely(!val)) 606 return 0; 607 608 raw_reg_write(regs, DG1_MSTR_TILE_INTR, val); 609 610 return val; 611 } 612 613 static inline void dg1_master_intr_enable(void __iomem * const regs) 614 { 615 raw_reg_write(regs, DG1_MSTR_TILE_INTR, DG1_MSTR_IRQ); 616 } 617 618 static irqreturn_t dg1_irq_handler(int irq, void *arg) 619 { 620 struct drm_i915_private * const i915 = arg; 621 struct intel_gt *gt = to_gt(i915); 622 void __iomem * const regs = intel_uncore_regs(gt->uncore); 623 u32 master_tile_ctl, master_ctl; 624 u32 gu_misc_iir; 625 626 if (!intel_irqs_enabled(i915)) 627 return IRQ_NONE; 628 629 master_tile_ctl = dg1_master_intr_disable(regs); 630 if (!master_tile_ctl) { 631 dg1_master_intr_enable(regs); 632 return IRQ_NONE; 633 } 634 635 /* FIXME: we only support tile 0 for now. */ 636 if (master_tile_ctl & DG1_MSTR_TILE(0)) { 637 master_ctl = raw_reg_read(regs, GEN11_GFX_MSTR_IRQ); 638 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, master_ctl); 639 } else { 640 drm_err(&i915->drm, "Tile not supported: 0x%08x\n", 641 master_tile_ctl); 642 dg1_master_intr_enable(regs); 643 return IRQ_NONE; 644 } 645 646 gen11_gt_irq_handler(gt, master_ctl); 647 648 if (master_ctl & GEN11_DISPLAY_IRQ) 649 gen11_display_irq_handler(i915); 650 651 gu_misc_iir = gen11_gu_misc_irq_ack(i915, master_ctl); 652 653 dg1_master_intr_enable(regs); 654 655 gen11_gu_misc_irq_handler(i915, gu_misc_iir); 656 657 pmu_irq_stats(i915, IRQ_HANDLED); 658 659 return IRQ_HANDLED; 660 } 661 662 static void ibx_irq_reset(struct drm_i915_private *dev_priv) 663 { 664 struct intel_uncore *uncore = &dev_priv->uncore; 665 666 if (HAS_PCH_NOP(dev_priv)) 667 return; 668 669 GEN3_IRQ_RESET(uncore, SDE); 670 671 if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv)) 672 intel_uncore_write(&dev_priv->uncore, SERR_INT, 0xffffffff); 673 } 674 675 /* drm_dma.h hooks 676 */ 677 static void ilk_irq_reset(struct drm_i915_private *dev_priv) 678 { 679 struct intel_uncore *uncore = &dev_priv->uncore; 680 681 GEN3_IRQ_RESET(uncore, DE); 682 dev_priv->irq_mask = ~0u; 683 684 if (GRAPHICS_VER(dev_priv) == 7) 685 intel_uncore_write(uncore, GEN7_ERR_INT, 0xffffffff); 686 687 if (IS_HASWELL(dev_priv)) { 688 intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff); 689 intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff); 690 } 691 692 gen5_gt_irq_reset(to_gt(dev_priv)); 693 694 ibx_irq_reset(dev_priv); 695 } 696 697 static void valleyview_irq_reset(struct drm_i915_private *dev_priv) 698 { 699 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, 0); 700 intel_uncore_posting_read(&dev_priv->uncore, VLV_MASTER_IER); 701 702 gen5_gt_irq_reset(to_gt(dev_priv)); 703 704 spin_lock_irq(&dev_priv->irq_lock); 705 if (dev_priv->display.irq.display_irqs_enabled) 706 vlv_display_irq_reset(dev_priv); 707 spin_unlock_irq(&dev_priv->irq_lock); 708 } 709 710 static void gen8_irq_reset(struct drm_i915_private *dev_priv) 711 { 712 struct intel_uncore *uncore = &dev_priv->uncore; 713 714 gen8_master_intr_disable(intel_uncore_regs(uncore)); 715 716 gen8_gt_irq_reset(to_gt(dev_priv)); 717 gen8_display_irq_reset(dev_priv); 718 GEN3_IRQ_RESET(uncore, GEN8_PCU_); 719 720 if (HAS_PCH_SPLIT(dev_priv)) 721 ibx_irq_reset(dev_priv); 722 723 } 724 725 static void gen11_irq_reset(struct drm_i915_private *dev_priv) 726 { 727 struct intel_gt *gt = to_gt(dev_priv); 728 struct intel_uncore *uncore = gt->uncore; 729 730 gen11_master_intr_disable(intel_uncore_regs(&dev_priv->uncore)); 731 732 gen11_gt_irq_reset(gt); 733 gen11_display_irq_reset(dev_priv); 734 735 GEN3_IRQ_RESET(uncore, GEN11_GU_MISC_); 736 GEN3_IRQ_RESET(uncore, GEN8_PCU_); 737 } 738 739 static void dg1_irq_reset(struct drm_i915_private *dev_priv) 740 { 741 struct intel_uncore *uncore = &dev_priv->uncore; 742 struct intel_gt *gt; 743 unsigned int i; 744 745 dg1_master_intr_disable(intel_uncore_regs(&dev_priv->uncore)); 746 747 for_each_gt(gt, dev_priv, i) 748 gen11_gt_irq_reset(gt); 749 750 gen11_display_irq_reset(dev_priv); 751 752 GEN3_IRQ_RESET(uncore, GEN11_GU_MISC_); 753 GEN3_IRQ_RESET(uncore, GEN8_PCU_); 754 755 intel_uncore_write(uncore, GEN11_GFX_MSTR_IRQ, ~0); 756 } 757 758 static void cherryview_irq_reset(struct drm_i915_private *dev_priv) 759 { 760 struct intel_uncore *uncore = &dev_priv->uncore; 761 762 intel_uncore_write(uncore, GEN8_MASTER_IRQ, 0); 763 intel_uncore_posting_read(&dev_priv->uncore, GEN8_MASTER_IRQ); 764 765 gen8_gt_irq_reset(to_gt(dev_priv)); 766 767 GEN3_IRQ_RESET(uncore, GEN8_PCU_); 768 769 spin_lock_irq(&dev_priv->irq_lock); 770 if (dev_priv->display.irq.display_irqs_enabled) 771 vlv_display_irq_reset(dev_priv); 772 spin_unlock_irq(&dev_priv->irq_lock); 773 } 774 775 static void ilk_irq_postinstall(struct drm_i915_private *dev_priv) 776 { 777 gen5_gt_irq_postinstall(to_gt(dev_priv)); 778 779 ilk_de_irq_postinstall(dev_priv); 780 } 781 782 static void valleyview_irq_postinstall(struct drm_i915_private *dev_priv) 783 { 784 gen5_gt_irq_postinstall(to_gt(dev_priv)); 785 786 spin_lock_irq(&dev_priv->irq_lock); 787 if (dev_priv->display.irq.display_irqs_enabled) 788 vlv_display_irq_postinstall(dev_priv); 789 spin_unlock_irq(&dev_priv->irq_lock); 790 791 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE); 792 intel_uncore_posting_read(&dev_priv->uncore, VLV_MASTER_IER); 793 } 794 795 static void gen8_irq_postinstall(struct drm_i915_private *dev_priv) 796 { 797 gen8_gt_irq_postinstall(to_gt(dev_priv)); 798 gen8_de_irq_postinstall(dev_priv); 799 800 gen8_master_intr_enable(intel_uncore_regs(&dev_priv->uncore)); 801 } 802 803 static void gen11_irq_postinstall(struct drm_i915_private *dev_priv) 804 { 805 struct intel_gt *gt = to_gt(dev_priv); 806 struct intel_uncore *uncore = gt->uncore; 807 u32 gu_misc_masked = GEN11_GU_MISC_GSE; 808 809 gen11_gt_irq_postinstall(gt); 810 gen11_de_irq_postinstall(dev_priv); 811 812 GEN3_IRQ_INIT(uncore, GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked); 813 814 gen11_master_intr_enable(intel_uncore_regs(uncore)); 815 intel_uncore_posting_read(&dev_priv->uncore, GEN11_GFX_MSTR_IRQ); 816 } 817 818 static void dg1_irq_postinstall(struct drm_i915_private *dev_priv) 819 { 820 struct intel_uncore *uncore = &dev_priv->uncore; 821 u32 gu_misc_masked = GEN11_GU_MISC_GSE; 822 struct intel_gt *gt; 823 unsigned int i; 824 825 for_each_gt(gt, dev_priv, i) 826 gen11_gt_irq_postinstall(gt); 827 828 GEN3_IRQ_INIT(uncore, GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked); 829 830 dg1_de_irq_postinstall(dev_priv); 831 832 dg1_master_intr_enable(intel_uncore_regs(uncore)); 833 intel_uncore_posting_read(uncore, DG1_MSTR_TILE_INTR); 834 } 835 836 static void cherryview_irq_postinstall(struct drm_i915_private *dev_priv) 837 { 838 gen8_gt_irq_postinstall(to_gt(dev_priv)); 839 840 spin_lock_irq(&dev_priv->irq_lock); 841 if (dev_priv->display.irq.display_irqs_enabled) 842 vlv_display_irq_postinstall(dev_priv); 843 spin_unlock_irq(&dev_priv->irq_lock); 844 845 intel_uncore_write(&dev_priv->uncore, GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL); 846 intel_uncore_posting_read(&dev_priv->uncore, GEN8_MASTER_IRQ); 847 } 848 849 static void i8xx_irq_reset(struct drm_i915_private *dev_priv) 850 { 851 struct intel_uncore *uncore = &dev_priv->uncore; 852 853 i9xx_pipestat_irq_reset(dev_priv); 854 855 gen2_irq_reset(uncore); 856 dev_priv->irq_mask = ~0u; 857 } 858 859 static u32 i9xx_error_mask(struct drm_i915_private *i915) 860 { 861 /* 862 * On gen2/3 FBC generates (seemingly spurious) 863 * display INVALID_GTT/INVALID_GTT_PTE table errors. 864 * 865 * Also gen3 bspec has this to say: 866 * "DISPA_INVALID_GTT_PTE 867 " [DevNapa] : Reserved. This bit does not reflect the page 868 " table error for the display plane A." 869 * 870 * Unfortunately we can't mask off individual PGTBL_ER bits, 871 * so we just have to mask off all page table errors via EMR. 872 */ 873 if (HAS_FBC(i915)) 874 return ~I915_ERROR_MEMORY_REFRESH; 875 else 876 return ~(I915_ERROR_PAGE_TABLE | 877 I915_ERROR_MEMORY_REFRESH); 878 } 879 880 static void i8xx_irq_postinstall(struct drm_i915_private *dev_priv) 881 { 882 struct intel_uncore *uncore = &dev_priv->uncore; 883 u16 enable_mask; 884 885 intel_uncore_write16(uncore, EMR, i9xx_error_mask(dev_priv)); 886 887 /* Unmask the interrupts that we always want on. */ 888 dev_priv->irq_mask = 889 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 890 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 891 I915_MASTER_ERROR_INTERRUPT); 892 893 enable_mask = 894 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 895 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 896 I915_MASTER_ERROR_INTERRUPT | 897 I915_USER_INTERRUPT; 898 899 gen2_irq_init(uncore, dev_priv->irq_mask, enable_mask); 900 901 /* Interrupt setup is already guaranteed to be single-threaded, this is 902 * just to make the assert_spin_locked check happy. */ 903 spin_lock_irq(&dev_priv->irq_lock); 904 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); 905 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); 906 spin_unlock_irq(&dev_priv->irq_lock); 907 } 908 909 static void i8xx_error_irq_ack(struct drm_i915_private *i915, 910 u16 *eir, u16 *eir_stuck) 911 { 912 struct intel_uncore *uncore = &i915->uncore; 913 u16 emr; 914 915 *eir = intel_uncore_read16(uncore, EIR); 916 intel_uncore_write16(uncore, EIR, *eir); 917 918 *eir_stuck = intel_uncore_read16(uncore, EIR); 919 if (*eir_stuck == 0) 920 return; 921 922 /* 923 * Toggle all EMR bits to make sure we get an edge 924 * in the ISR master error bit if we don't clear 925 * all the EIR bits. Otherwise the edge triggered 926 * IIR on i965/g4x wouldn't notice that an interrupt 927 * is still pending. Also some EIR bits can't be 928 * cleared except by handling the underlying error 929 * (or by a GPU reset) so we mask any bit that 930 * remains set. 931 */ 932 emr = intel_uncore_read16(uncore, EMR); 933 intel_uncore_write16(uncore, EMR, 0xffff); 934 intel_uncore_write16(uncore, EMR, emr | *eir_stuck); 935 } 936 937 static void i8xx_error_irq_handler(struct drm_i915_private *dev_priv, 938 u16 eir, u16 eir_stuck) 939 { 940 drm_dbg(&dev_priv->drm, "Master Error: EIR 0x%04x\n", eir); 941 942 if (eir_stuck) 943 drm_dbg(&dev_priv->drm, "EIR stuck: 0x%04x, masked\n", 944 eir_stuck); 945 946 drm_dbg(&dev_priv->drm, "PGTBL_ER: 0x%08x\n", 947 intel_uncore_read(&dev_priv->uncore, PGTBL_ER)); 948 } 949 950 static void i9xx_error_irq_ack(struct drm_i915_private *dev_priv, 951 u32 *eir, u32 *eir_stuck) 952 { 953 u32 emr; 954 955 *eir = intel_uncore_read(&dev_priv->uncore, EIR); 956 intel_uncore_write(&dev_priv->uncore, EIR, *eir); 957 958 *eir_stuck = intel_uncore_read(&dev_priv->uncore, EIR); 959 if (*eir_stuck == 0) 960 return; 961 962 /* 963 * Toggle all EMR bits to make sure we get an edge 964 * in the ISR master error bit if we don't clear 965 * all the EIR bits. Otherwise the edge triggered 966 * IIR on i965/g4x wouldn't notice that an interrupt 967 * is still pending. Also some EIR bits can't be 968 * cleared except by handling the underlying error 969 * (or by a GPU reset) so we mask any bit that 970 * remains set. 971 */ 972 emr = intel_uncore_read(&dev_priv->uncore, EMR); 973 intel_uncore_write(&dev_priv->uncore, EMR, 0xffffffff); 974 intel_uncore_write(&dev_priv->uncore, EMR, emr | *eir_stuck); 975 } 976 977 static void i9xx_error_irq_handler(struct drm_i915_private *dev_priv, 978 u32 eir, u32 eir_stuck) 979 { 980 drm_dbg(&dev_priv->drm, "Master Error, EIR 0x%08x\n", eir); 981 982 if (eir_stuck) 983 drm_dbg(&dev_priv->drm, "EIR stuck: 0x%08x, masked\n", 984 eir_stuck); 985 986 drm_dbg(&dev_priv->drm, "PGTBL_ER: 0x%08x\n", 987 intel_uncore_read(&dev_priv->uncore, PGTBL_ER)); 988 } 989 990 static irqreturn_t i8xx_irq_handler(int irq, void *arg) 991 { 992 struct drm_i915_private *dev_priv = arg; 993 irqreturn_t ret = IRQ_NONE; 994 995 if (!intel_irqs_enabled(dev_priv)) 996 return IRQ_NONE; 997 998 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 999 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1000 1001 do { 1002 u32 pipe_stats[I915_MAX_PIPES] = {}; 1003 u16 eir = 0, eir_stuck = 0; 1004 u16 iir; 1005 1006 iir = intel_uncore_read16(&dev_priv->uncore, GEN2_IIR); 1007 if (iir == 0) 1008 break; 1009 1010 ret = IRQ_HANDLED; 1011 1012 /* Call regardless, as some status bits might not be 1013 * signalled in iir */ 1014 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 1015 1016 if (iir & I915_MASTER_ERROR_INTERRUPT) 1017 i8xx_error_irq_ack(dev_priv, &eir, &eir_stuck); 1018 1019 intel_uncore_write16(&dev_priv->uncore, GEN2_IIR, iir); 1020 1021 if (iir & I915_USER_INTERRUPT) 1022 intel_engine_cs_irq(to_gt(dev_priv)->engine[RCS0], iir); 1023 1024 if (iir & I915_MASTER_ERROR_INTERRUPT) 1025 i8xx_error_irq_handler(dev_priv, eir, eir_stuck); 1026 1027 i8xx_pipestat_irq_handler(dev_priv, iir, pipe_stats); 1028 } while (0); 1029 1030 pmu_irq_stats(dev_priv, ret); 1031 1032 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1033 1034 return ret; 1035 } 1036 1037 static void i915_irq_reset(struct drm_i915_private *dev_priv) 1038 { 1039 struct intel_uncore *uncore = &dev_priv->uncore; 1040 1041 if (I915_HAS_HOTPLUG(dev_priv)) { 1042 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0); 1043 intel_uncore_rmw(&dev_priv->uncore, PORT_HOTPLUG_STAT, 0, 0); 1044 } 1045 1046 i9xx_pipestat_irq_reset(dev_priv); 1047 1048 GEN3_IRQ_RESET(uncore, GEN2_); 1049 dev_priv->irq_mask = ~0u; 1050 } 1051 1052 static void i915_irq_postinstall(struct drm_i915_private *dev_priv) 1053 { 1054 struct intel_uncore *uncore = &dev_priv->uncore; 1055 u32 enable_mask; 1056 1057 intel_uncore_write(uncore, EMR, i9xx_error_mask(dev_priv)); 1058 1059 /* Unmask the interrupts that we always want on. */ 1060 dev_priv->irq_mask = 1061 ~(I915_ASLE_INTERRUPT | 1062 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 1063 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 1064 I915_MASTER_ERROR_INTERRUPT); 1065 1066 enable_mask = 1067 I915_ASLE_INTERRUPT | 1068 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 1069 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 1070 I915_MASTER_ERROR_INTERRUPT | 1071 I915_USER_INTERRUPT; 1072 1073 if (I915_HAS_HOTPLUG(dev_priv)) { 1074 /* Enable in IER... */ 1075 enable_mask |= I915_DISPLAY_PORT_INTERRUPT; 1076 /* and unmask in IMR */ 1077 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT; 1078 } 1079 1080 GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask); 1081 1082 /* Interrupt setup is already guaranteed to be single-threaded, this is 1083 * just to make the assert_spin_locked check happy. */ 1084 spin_lock_irq(&dev_priv->irq_lock); 1085 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); 1086 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); 1087 spin_unlock_irq(&dev_priv->irq_lock); 1088 1089 i915_enable_asle_pipestat(dev_priv); 1090 } 1091 1092 static irqreturn_t i915_irq_handler(int irq, void *arg) 1093 { 1094 struct drm_i915_private *dev_priv = arg; 1095 irqreturn_t ret = IRQ_NONE; 1096 1097 if (!intel_irqs_enabled(dev_priv)) 1098 return IRQ_NONE; 1099 1100 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 1101 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1102 1103 do { 1104 u32 pipe_stats[I915_MAX_PIPES] = {}; 1105 u32 eir = 0, eir_stuck = 0; 1106 u32 hotplug_status = 0; 1107 u32 iir; 1108 1109 iir = intel_uncore_read(&dev_priv->uncore, GEN2_IIR); 1110 if (iir == 0) 1111 break; 1112 1113 ret = IRQ_HANDLED; 1114 1115 if (I915_HAS_HOTPLUG(dev_priv) && 1116 iir & I915_DISPLAY_PORT_INTERRUPT) 1117 hotplug_status = i9xx_hpd_irq_ack(dev_priv); 1118 1119 /* Call regardless, as some status bits might not be 1120 * signalled in iir */ 1121 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 1122 1123 if (iir & I915_MASTER_ERROR_INTERRUPT) 1124 i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck); 1125 1126 intel_uncore_write(&dev_priv->uncore, GEN2_IIR, iir); 1127 1128 if (iir & I915_USER_INTERRUPT) 1129 intel_engine_cs_irq(to_gt(dev_priv)->engine[RCS0], iir); 1130 1131 if (iir & I915_MASTER_ERROR_INTERRUPT) 1132 i9xx_error_irq_handler(dev_priv, eir, eir_stuck); 1133 1134 if (hotplug_status) 1135 i9xx_hpd_irq_handler(dev_priv, hotplug_status); 1136 1137 i915_pipestat_irq_handler(dev_priv, iir, pipe_stats); 1138 } while (0); 1139 1140 pmu_irq_stats(dev_priv, ret); 1141 1142 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1143 1144 return ret; 1145 } 1146 1147 static void i965_irq_reset(struct drm_i915_private *dev_priv) 1148 { 1149 struct intel_uncore *uncore = &dev_priv->uncore; 1150 1151 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0); 1152 intel_uncore_rmw(uncore, PORT_HOTPLUG_STAT, 0, 0); 1153 1154 i9xx_pipestat_irq_reset(dev_priv); 1155 1156 GEN3_IRQ_RESET(uncore, GEN2_); 1157 dev_priv->irq_mask = ~0u; 1158 } 1159 1160 static u32 i965_error_mask(struct drm_i915_private *i915) 1161 { 1162 /* 1163 * Enable some error detection, note the instruction error mask 1164 * bit is reserved, so we leave it masked. 1165 * 1166 * i965 FBC no longer generates spurious GTT errors, 1167 * so we can always enable the page table errors. 1168 */ 1169 if (IS_G4X(i915)) 1170 return ~(GM45_ERROR_PAGE_TABLE | 1171 GM45_ERROR_MEM_PRIV | 1172 GM45_ERROR_CP_PRIV | 1173 I915_ERROR_MEMORY_REFRESH); 1174 else 1175 return ~(I915_ERROR_PAGE_TABLE | 1176 I915_ERROR_MEMORY_REFRESH); 1177 } 1178 1179 static void i965_irq_postinstall(struct drm_i915_private *dev_priv) 1180 { 1181 struct intel_uncore *uncore = &dev_priv->uncore; 1182 u32 enable_mask; 1183 1184 intel_uncore_write(uncore, EMR, i965_error_mask(dev_priv)); 1185 1186 /* Unmask the interrupts that we always want on. */ 1187 dev_priv->irq_mask = 1188 ~(I915_ASLE_INTERRUPT | 1189 I915_DISPLAY_PORT_INTERRUPT | 1190 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 1191 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 1192 I915_MASTER_ERROR_INTERRUPT); 1193 1194 enable_mask = 1195 I915_ASLE_INTERRUPT | 1196 I915_DISPLAY_PORT_INTERRUPT | 1197 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 1198 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 1199 I915_MASTER_ERROR_INTERRUPT | 1200 I915_USER_INTERRUPT; 1201 1202 if (IS_G4X(dev_priv)) 1203 enable_mask |= I915_BSD_USER_INTERRUPT; 1204 1205 GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask); 1206 1207 /* Interrupt setup is already guaranteed to be single-threaded, this is 1208 * just to make the assert_spin_locked check happy. */ 1209 spin_lock_irq(&dev_priv->irq_lock); 1210 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS); 1211 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); 1212 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); 1213 spin_unlock_irq(&dev_priv->irq_lock); 1214 1215 i915_enable_asle_pipestat(dev_priv); 1216 } 1217 1218 static irqreturn_t i965_irq_handler(int irq, void *arg) 1219 { 1220 struct drm_i915_private *dev_priv = arg; 1221 irqreturn_t ret = IRQ_NONE; 1222 1223 if (!intel_irqs_enabled(dev_priv)) 1224 return IRQ_NONE; 1225 1226 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 1227 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1228 1229 do { 1230 u32 pipe_stats[I915_MAX_PIPES] = {}; 1231 u32 eir = 0, eir_stuck = 0; 1232 u32 hotplug_status = 0; 1233 u32 iir; 1234 1235 iir = intel_uncore_read(&dev_priv->uncore, GEN2_IIR); 1236 if (iir == 0) 1237 break; 1238 1239 ret = IRQ_HANDLED; 1240 1241 if (iir & I915_DISPLAY_PORT_INTERRUPT) 1242 hotplug_status = i9xx_hpd_irq_ack(dev_priv); 1243 1244 /* Call regardless, as some status bits might not be 1245 * signalled in iir */ 1246 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 1247 1248 if (iir & I915_MASTER_ERROR_INTERRUPT) 1249 i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck); 1250 1251 intel_uncore_write(&dev_priv->uncore, GEN2_IIR, iir); 1252 1253 if (iir & I915_USER_INTERRUPT) 1254 intel_engine_cs_irq(to_gt(dev_priv)->engine[RCS0], 1255 iir); 1256 1257 if (iir & I915_BSD_USER_INTERRUPT) 1258 intel_engine_cs_irq(to_gt(dev_priv)->engine[VCS0], 1259 iir >> 25); 1260 1261 if (iir & I915_MASTER_ERROR_INTERRUPT) 1262 i9xx_error_irq_handler(dev_priv, eir, eir_stuck); 1263 1264 if (hotplug_status) 1265 i9xx_hpd_irq_handler(dev_priv, hotplug_status); 1266 1267 i965_pipestat_irq_handler(dev_priv, iir, pipe_stats); 1268 } while (0); 1269 1270 pmu_irq_stats(dev_priv, IRQ_HANDLED); 1271 1272 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1273 1274 return ret; 1275 } 1276 1277 /** 1278 * intel_irq_init - initializes irq support 1279 * @dev_priv: i915 device instance 1280 * 1281 * This function initializes all the irq support including work items, timers 1282 * and all the vtables. It does not setup the interrupt itself though. 1283 */ 1284 void intel_irq_init(struct drm_i915_private *dev_priv) 1285 { 1286 int i; 1287 1288 INIT_WORK(&dev_priv->l3_parity.error_work, ivb_parity_work); 1289 for (i = 0; i < MAX_L3_SLICES; ++i) 1290 dev_priv->l3_parity.remap_info[i] = NULL; 1291 1292 /* pre-gen11 the guc irqs bits are in the upper 16 bits of the pm reg */ 1293 if (HAS_GT_UC(dev_priv) && GRAPHICS_VER(dev_priv) < 11) 1294 to_gt(dev_priv)->pm_guc_events = GUC_INTR_GUC2HOST << 16; 1295 } 1296 1297 /** 1298 * intel_irq_fini - deinitializes IRQ support 1299 * @i915: i915 device instance 1300 * 1301 * This function deinitializes all the IRQ support. 1302 */ 1303 void intel_irq_fini(struct drm_i915_private *i915) 1304 { 1305 int i; 1306 1307 for (i = 0; i < MAX_L3_SLICES; ++i) 1308 kfree(i915->l3_parity.remap_info[i]); 1309 } 1310 1311 static irq_handler_t intel_irq_handler(struct drm_i915_private *dev_priv) 1312 { 1313 if (HAS_GMCH(dev_priv)) { 1314 if (IS_CHERRYVIEW(dev_priv)) 1315 return cherryview_irq_handler; 1316 else if (IS_VALLEYVIEW(dev_priv)) 1317 return valleyview_irq_handler; 1318 else if (GRAPHICS_VER(dev_priv) == 4) 1319 return i965_irq_handler; 1320 else if (GRAPHICS_VER(dev_priv) == 3) 1321 return i915_irq_handler; 1322 else 1323 return i8xx_irq_handler; 1324 } else { 1325 if (GRAPHICS_VER_FULL(dev_priv) >= IP_VER(12, 10)) 1326 return dg1_irq_handler; 1327 else if (GRAPHICS_VER(dev_priv) >= 11) 1328 return gen11_irq_handler; 1329 else if (GRAPHICS_VER(dev_priv) >= 8) 1330 return gen8_irq_handler; 1331 else 1332 return ilk_irq_handler; 1333 } 1334 } 1335 1336 static void intel_irq_reset(struct drm_i915_private *dev_priv) 1337 { 1338 if (HAS_GMCH(dev_priv)) { 1339 if (IS_CHERRYVIEW(dev_priv)) 1340 cherryview_irq_reset(dev_priv); 1341 else if (IS_VALLEYVIEW(dev_priv)) 1342 valleyview_irq_reset(dev_priv); 1343 else if (GRAPHICS_VER(dev_priv) == 4) 1344 i965_irq_reset(dev_priv); 1345 else if (GRAPHICS_VER(dev_priv) == 3) 1346 i915_irq_reset(dev_priv); 1347 else 1348 i8xx_irq_reset(dev_priv); 1349 } else { 1350 if (GRAPHICS_VER_FULL(dev_priv) >= IP_VER(12, 10)) 1351 dg1_irq_reset(dev_priv); 1352 else if (GRAPHICS_VER(dev_priv) >= 11) 1353 gen11_irq_reset(dev_priv); 1354 else if (GRAPHICS_VER(dev_priv) >= 8) 1355 gen8_irq_reset(dev_priv); 1356 else 1357 ilk_irq_reset(dev_priv); 1358 } 1359 } 1360 1361 static void intel_irq_postinstall(struct drm_i915_private *dev_priv) 1362 { 1363 if (HAS_GMCH(dev_priv)) { 1364 if (IS_CHERRYVIEW(dev_priv)) 1365 cherryview_irq_postinstall(dev_priv); 1366 else if (IS_VALLEYVIEW(dev_priv)) 1367 valleyview_irq_postinstall(dev_priv); 1368 else if (GRAPHICS_VER(dev_priv) == 4) 1369 i965_irq_postinstall(dev_priv); 1370 else if (GRAPHICS_VER(dev_priv) == 3) 1371 i915_irq_postinstall(dev_priv); 1372 else 1373 i8xx_irq_postinstall(dev_priv); 1374 } else { 1375 if (GRAPHICS_VER_FULL(dev_priv) >= IP_VER(12, 10)) 1376 dg1_irq_postinstall(dev_priv); 1377 else if (GRAPHICS_VER(dev_priv) >= 11) 1378 gen11_irq_postinstall(dev_priv); 1379 else if (GRAPHICS_VER(dev_priv) >= 8) 1380 gen8_irq_postinstall(dev_priv); 1381 else 1382 ilk_irq_postinstall(dev_priv); 1383 } 1384 } 1385 1386 /** 1387 * intel_irq_install - enables the hardware interrupt 1388 * @dev_priv: i915 device instance 1389 * 1390 * This function enables the hardware interrupt handling, but leaves the hotplug 1391 * handling still disabled. It is called after intel_irq_init(). 1392 * 1393 * In the driver load and resume code we need working interrupts in a few places 1394 * but don't want to deal with the hassle of concurrent probe and hotplug 1395 * workers. Hence the split into this two-stage approach. 1396 */ 1397 int intel_irq_install(struct drm_i915_private *dev_priv) 1398 { 1399 int irq = to_pci_dev(dev_priv->drm.dev)->irq; 1400 int ret; 1401 1402 /* 1403 * We enable some interrupt sources in our postinstall hooks, so mark 1404 * interrupts as enabled _before_ actually enabling them to avoid 1405 * special cases in our ordering checks. 1406 */ 1407 dev_priv->runtime_pm.irqs_enabled = true; 1408 1409 dev_priv->irq_enabled = true; 1410 1411 intel_irq_reset(dev_priv); 1412 1413 ret = request_irq(irq, intel_irq_handler(dev_priv), 1414 IRQF_SHARED, DRIVER_NAME, dev_priv); 1415 if (ret < 0) { 1416 dev_priv->irq_enabled = false; 1417 return ret; 1418 } 1419 1420 intel_irq_postinstall(dev_priv); 1421 1422 return ret; 1423 } 1424 1425 /** 1426 * intel_irq_uninstall - finilizes all irq handling 1427 * @dev_priv: i915 device instance 1428 * 1429 * This stops interrupt and hotplug handling and unregisters and frees all 1430 * resources acquired in the init functions. 1431 */ 1432 void intel_irq_uninstall(struct drm_i915_private *dev_priv) 1433 { 1434 int irq = to_pci_dev(dev_priv->drm.dev)->irq; 1435 1436 /* 1437 * FIXME we can get called twice during driver probe 1438 * error handling as well as during driver remove due to 1439 * intel_display_driver_remove() calling us out of sequence. 1440 * Would be nice if it didn't do that... 1441 */ 1442 if (!dev_priv->irq_enabled) 1443 return; 1444 1445 dev_priv->irq_enabled = false; 1446 1447 intel_irq_reset(dev_priv); 1448 1449 free_irq(irq, dev_priv); 1450 1451 intel_hpd_cancel_work(dev_priv); 1452 dev_priv->runtime_pm.irqs_enabled = false; 1453 } 1454 1455 /** 1456 * intel_runtime_pm_disable_interrupts - runtime interrupt disabling 1457 * @dev_priv: i915 device instance 1458 * 1459 * This function is used to disable interrupts at runtime, both in the runtime 1460 * pm and the system suspend/resume code. 1461 */ 1462 void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv) 1463 { 1464 intel_irq_reset(dev_priv); 1465 dev_priv->runtime_pm.irqs_enabled = false; 1466 intel_synchronize_irq(dev_priv); 1467 } 1468 1469 /** 1470 * intel_runtime_pm_enable_interrupts - runtime interrupt enabling 1471 * @dev_priv: i915 device instance 1472 * 1473 * This function is used to enable interrupts at runtime, both in the runtime 1474 * pm and the system suspend/resume code. 1475 */ 1476 void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv) 1477 { 1478 dev_priv->runtime_pm.irqs_enabled = true; 1479 intel_irq_reset(dev_priv); 1480 intel_irq_postinstall(dev_priv); 1481 } 1482 1483 bool intel_irqs_enabled(struct drm_i915_private *dev_priv) 1484 { 1485 return dev_priv->runtime_pm.irqs_enabled; 1486 } 1487 1488 void intel_synchronize_irq(struct drm_i915_private *i915) 1489 { 1490 synchronize_irq(to_pci_dev(i915->drm.dev)->irq); 1491 } 1492 1493 void intel_synchronize_hardirq(struct drm_i915_private *i915) 1494 { 1495 synchronize_hardirq(to_pci_dev(i915->drm.dev)->irq); 1496 } 1497