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 */ 68static 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 81void 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 96static 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 */ 113void 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 129static 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 145void 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 157static 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 */ 176static 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 242out: 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 251static 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 337static 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 */ 423static 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 493static 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 506static 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 511static 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 543static 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 556static 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 561static 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 596static 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 613static 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 618static 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 662static 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*/ 677static 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 697static 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_irqs_enabled) 706 vlv_display_irq_reset(dev_priv); 707 spin_unlock_irq(&dev_priv->irq_lock); 708} 709 710static 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 725static 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 739static 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 756static void cherryview_irq_reset(struct drm_i915_private *dev_priv) 757{ 758 struct intel_uncore *uncore = &dev_priv->uncore; 759 760 intel_uncore_write(uncore, GEN8_MASTER_IRQ, 0); 761 intel_uncore_posting_read(&dev_priv->uncore, GEN8_MASTER_IRQ); 762 763 gen8_gt_irq_reset(to_gt(dev_priv)); 764 765 GEN3_IRQ_RESET(uncore, GEN8_PCU_); 766 767 spin_lock_irq(&dev_priv->irq_lock); 768 if (dev_priv->display_irqs_enabled) 769 vlv_display_irq_reset(dev_priv); 770 spin_unlock_irq(&dev_priv->irq_lock); 771} 772 773static void ilk_irq_postinstall(struct drm_i915_private *dev_priv) 774{ 775 gen5_gt_irq_postinstall(to_gt(dev_priv)); 776 777 ilk_de_irq_postinstall(dev_priv); 778} 779 780static void valleyview_irq_postinstall(struct drm_i915_private *dev_priv) 781{ 782 gen5_gt_irq_postinstall(to_gt(dev_priv)); 783 784 spin_lock_irq(&dev_priv->irq_lock); 785 if (dev_priv->display_irqs_enabled) 786 vlv_display_irq_postinstall(dev_priv); 787 spin_unlock_irq(&dev_priv->irq_lock); 788 789 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE); 790 intel_uncore_posting_read(&dev_priv->uncore, VLV_MASTER_IER); 791} 792 793static void gen8_irq_postinstall(struct drm_i915_private *dev_priv) 794{ 795 gen8_gt_irq_postinstall(to_gt(dev_priv)); 796 gen8_de_irq_postinstall(dev_priv); 797 798 gen8_master_intr_enable(intel_uncore_regs(&dev_priv->uncore)); 799} 800 801static void gen11_irq_postinstall(struct drm_i915_private *dev_priv) 802{ 803 struct intel_gt *gt = to_gt(dev_priv); 804 struct intel_uncore *uncore = gt->uncore; 805 u32 gu_misc_masked = GEN11_GU_MISC_GSE; 806 807 gen11_gt_irq_postinstall(gt); 808 gen11_de_irq_postinstall(dev_priv); 809 810 GEN3_IRQ_INIT(uncore, GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked); 811 812 gen11_master_intr_enable(intel_uncore_regs(uncore)); 813 intel_uncore_posting_read(&dev_priv->uncore, GEN11_GFX_MSTR_IRQ); 814} 815 816static void dg1_irq_postinstall(struct drm_i915_private *dev_priv) 817{ 818 struct intel_uncore *uncore = &dev_priv->uncore; 819 u32 gu_misc_masked = GEN11_GU_MISC_GSE; 820 struct intel_gt *gt; 821 unsigned int i; 822 823 for_each_gt(gt, dev_priv, i) 824 gen11_gt_irq_postinstall(gt); 825 826 GEN3_IRQ_INIT(uncore, GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked); 827 828 dg1_de_irq_postinstall(dev_priv); 829 830 dg1_master_intr_enable(intel_uncore_regs(uncore)); 831 intel_uncore_posting_read(uncore, DG1_MSTR_TILE_INTR); 832} 833 834static void cherryview_irq_postinstall(struct drm_i915_private *dev_priv) 835{ 836 gen8_gt_irq_postinstall(to_gt(dev_priv)); 837 838 spin_lock_irq(&dev_priv->irq_lock); 839 if (dev_priv->display_irqs_enabled) 840 vlv_display_irq_postinstall(dev_priv); 841 spin_unlock_irq(&dev_priv->irq_lock); 842 843 intel_uncore_write(&dev_priv->uncore, GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL); 844 intel_uncore_posting_read(&dev_priv->uncore, GEN8_MASTER_IRQ); 845} 846 847static void i8xx_irq_reset(struct drm_i915_private *dev_priv) 848{ 849 struct intel_uncore *uncore = &dev_priv->uncore; 850 851 i9xx_pipestat_irq_reset(dev_priv); 852 853 gen2_irq_reset(uncore); 854 dev_priv->irq_mask = ~0u; 855} 856 857static u32 i9xx_error_mask(struct drm_i915_private *i915) 858{ 859 /* 860 * On gen2/3 FBC generates (seemingly spurious) 861 * display INVALID_GTT/INVALID_GTT_PTE table errors. 862 * 863 * Also gen3 bspec has this to say: 864 * "DISPA_INVALID_GTT_PTE 865 " [DevNapa] : Reserved. This bit does not reflect the page 866 " table error for the display plane A." 867 * 868 * Unfortunately we can't mask off individual PGTBL_ER bits, 869 * so we just have to mask off all page table errors via EMR. 870 */ 871 if (HAS_FBC(i915)) 872 return ~I915_ERROR_MEMORY_REFRESH; 873 else 874 return ~(I915_ERROR_PAGE_TABLE | 875 I915_ERROR_MEMORY_REFRESH); 876} 877 878static void i8xx_irq_postinstall(struct drm_i915_private *dev_priv) 879{ 880 struct intel_uncore *uncore = &dev_priv->uncore; 881 u16 enable_mask; 882 883 intel_uncore_write16(uncore, EMR, i9xx_error_mask(dev_priv)); 884 885 /* Unmask the interrupts that we always want on. */ 886 dev_priv->irq_mask = 887 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 888 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 889 I915_MASTER_ERROR_INTERRUPT); 890 891 enable_mask = 892 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 893 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 894 I915_MASTER_ERROR_INTERRUPT | 895 I915_USER_INTERRUPT; 896 897 gen2_irq_init(uncore, dev_priv->irq_mask, enable_mask); 898 899 /* Interrupt setup is already guaranteed to be single-threaded, this is 900 * just to make the assert_spin_locked check happy. */ 901 spin_lock_irq(&dev_priv->irq_lock); 902 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); 903 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); 904 spin_unlock_irq(&dev_priv->irq_lock); 905} 906 907static void i8xx_error_irq_ack(struct drm_i915_private *i915, 908 u16 *eir, u16 *eir_stuck) 909{ 910 struct intel_uncore *uncore = &i915->uncore; 911 u16 emr; 912 913 *eir = intel_uncore_read16(uncore, EIR); 914 intel_uncore_write16(uncore, EIR, *eir); 915 916 *eir_stuck = intel_uncore_read16(uncore, EIR); 917 if (*eir_stuck == 0) 918 return; 919 920 /* 921 * Toggle all EMR bits to make sure we get an edge 922 * in the ISR master error bit if we don't clear 923 * all the EIR bits. Otherwise the edge triggered 924 * IIR on i965/g4x wouldn't notice that an interrupt 925 * is still pending. Also some EIR bits can't be 926 * cleared except by handling the underlying error 927 * (or by a GPU reset) so we mask any bit that 928 * remains set. 929 */ 930 emr = intel_uncore_read16(uncore, EMR); 931 intel_uncore_write16(uncore, EMR, 0xffff); 932 intel_uncore_write16(uncore, EMR, emr | *eir_stuck); 933} 934 935static void i8xx_error_irq_handler(struct drm_i915_private *dev_priv, 936 u16 eir, u16 eir_stuck) 937{ 938 drm_dbg(&dev_priv->drm, "Master Error: EIR 0x%04x\n", eir); 939 940 if (eir_stuck) 941 drm_dbg(&dev_priv->drm, "EIR stuck: 0x%04x, masked\n", 942 eir_stuck); 943 944 drm_dbg(&dev_priv->drm, "PGTBL_ER: 0x%08x\n", 945 intel_uncore_read(&dev_priv->uncore, PGTBL_ER)); 946} 947 948static void i9xx_error_irq_ack(struct drm_i915_private *dev_priv, 949 u32 *eir, u32 *eir_stuck) 950{ 951 u32 emr; 952 953 *eir = intel_uncore_read(&dev_priv->uncore, EIR); 954 intel_uncore_write(&dev_priv->uncore, EIR, *eir); 955 956 *eir_stuck = intel_uncore_read(&dev_priv->uncore, EIR); 957 if (*eir_stuck == 0) 958 return; 959 960 /* 961 * Toggle all EMR bits to make sure we get an edge 962 * in the ISR master error bit if we don't clear 963 * all the EIR bits. Otherwise the edge triggered 964 * IIR on i965/g4x wouldn't notice that an interrupt 965 * is still pending. Also some EIR bits can't be 966 * cleared except by handling the underlying error 967 * (or by a GPU reset) so we mask any bit that 968 * remains set. 969 */ 970 emr = intel_uncore_read(&dev_priv->uncore, EMR); 971 intel_uncore_write(&dev_priv->uncore, EMR, 0xffffffff); 972 intel_uncore_write(&dev_priv->uncore, EMR, emr | *eir_stuck); 973} 974 975static void i9xx_error_irq_handler(struct drm_i915_private *dev_priv, 976 u32 eir, u32 eir_stuck) 977{ 978 drm_dbg(&dev_priv->drm, "Master Error, EIR 0x%08x\n", eir); 979 980 if (eir_stuck) 981 drm_dbg(&dev_priv->drm, "EIR stuck: 0x%08x, masked\n", 982 eir_stuck); 983 984 drm_dbg(&dev_priv->drm, "PGTBL_ER: 0x%08x\n", 985 intel_uncore_read(&dev_priv->uncore, PGTBL_ER)); 986} 987 988static irqreturn_t i8xx_irq_handler(int irq, void *arg) 989{ 990 struct drm_i915_private *dev_priv = arg; 991 irqreturn_t ret = IRQ_NONE; 992 993 if (!intel_irqs_enabled(dev_priv)) 994 return IRQ_NONE; 995 996 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 997 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 998 999 do { 1000 u32 pipe_stats[I915_MAX_PIPES] = {}; 1001 u16 eir = 0, eir_stuck = 0; 1002 u16 iir; 1003 1004 iir = intel_uncore_read16(&dev_priv->uncore, GEN2_IIR); 1005 if (iir == 0) 1006 break; 1007 1008 ret = IRQ_HANDLED; 1009 1010 /* Call regardless, as some status bits might not be 1011 * signalled in iir */ 1012 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 1013 1014 if (iir & I915_MASTER_ERROR_INTERRUPT) 1015 i8xx_error_irq_ack(dev_priv, &eir, &eir_stuck); 1016 1017 intel_uncore_write16(&dev_priv->uncore, GEN2_IIR, iir); 1018 1019 if (iir & I915_USER_INTERRUPT) 1020 intel_engine_cs_irq(to_gt(dev_priv)->engine[RCS0], iir); 1021 1022 if (iir & I915_MASTER_ERROR_INTERRUPT) 1023 i8xx_error_irq_handler(dev_priv, eir, eir_stuck); 1024 1025 i8xx_pipestat_irq_handler(dev_priv, iir, pipe_stats); 1026 } while (0); 1027 1028 pmu_irq_stats(dev_priv, ret); 1029 1030 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1031 1032 return ret; 1033} 1034 1035static void i915_irq_reset(struct drm_i915_private *dev_priv) 1036{ 1037 struct intel_uncore *uncore = &dev_priv->uncore; 1038 1039 if (I915_HAS_HOTPLUG(dev_priv)) { 1040 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0); 1041 intel_uncore_rmw(&dev_priv->uncore, PORT_HOTPLUG_STAT, 0, 0); 1042 } 1043 1044 i9xx_pipestat_irq_reset(dev_priv); 1045 1046 GEN3_IRQ_RESET(uncore, GEN2_); 1047 dev_priv->irq_mask = ~0u; 1048} 1049 1050static void i915_irq_postinstall(struct drm_i915_private *dev_priv) 1051{ 1052 struct intel_uncore *uncore = &dev_priv->uncore; 1053 u32 enable_mask; 1054 1055 intel_uncore_write(uncore, EMR, i9xx_error_mask(dev_priv)); 1056 1057 /* Unmask the interrupts that we always want on. */ 1058 dev_priv->irq_mask = 1059 ~(I915_ASLE_INTERRUPT | 1060 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 1061 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 1062 I915_MASTER_ERROR_INTERRUPT); 1063 1064 enable_mask = 1065 I915_ASLE_INTERRUPT | 1066 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 1067 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 1068 I915_MASTER_ERROR_INTERRUPT | 1069 I915_USER_INTERRUPT; 1070 1071 if (I915_HAS_HOTPLUG(dev_priv)) { 1072 /* Enable in IER... */ 1073 enable_mask |= I915_DISPLAY_PORT_INTERRUPT; 1074 /* and unmask in IMR */ 1075 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT; 1076 } 1077 1078 GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask); 1079 1080 /* Interrupt setup is already guaranteed to be single-threaded, this is 1081 * just to make the assert_spin_locked check happy. */ 1082 spin_lock_irq(&dev_priv->irq_lock); 1083 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); 1084 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); 1085 spin_unlock_irq(&dev_priv->irq_lock); 1086 1087 i915_enable_asle_pipestat(dev_priv); 1088} 1089 1090static irqreturn_t i915_irq_handler(int irq, void *arg) 1091{ 1092 struct drm_i915_private *dev_priv = arg; 1093 irqreturn_t ret = IRQ_NONE; 1094 1095 if (!intel_irqs_enabled(dev_priv)) 1096 return IRQ_NONE; 1097 1098 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 1099 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1100 1101 do { 1102 u32 pipe_stats[I915_MAX_PIPES] = {}; 1103 u32 eir = 0, eir_stuck = 0; 1104 u32 hotplug_status = 0; 1105 u32 iir; 1106 1107 iir = intel_uncore_read(&dev_priv->uncore, GEN2_IIR); 1108 if (iir == 0) 1109 break; 1110 1111 ret = IRQ_HANDLED; 1112 1113 if (I915_HAS_HOTPLUG(dev_priv) && 1114 iir & I915_DISPLAY_PORT_INTERRUPT) 1115 hotplug_status = i9xx_hpd_irq_ack(dev_priv); 1116 1117 /* Call regardless, as some status bits might not be 1118 * signalled in iir */ 1119 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 1120 1121 if (iir & I915_MASTER_ERROR_INTERRUPT) 1122 i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck); 1123 1124 intel_uncore_write(&dev_priv->uncore, GEN2_IIR, iir); 1125 1126 if (iir & I915_USER_INTERRUPT) 1127 intel_engine_cs_irq(to_gt(dev_priv)->engine[RCS0], iir); 1128 1129 if (iir & I915_MASTER_ERROR_INTERRUPT) 1130 i9xx_error_irq_handler(dev_priv, eir, eir_stuck); 1131 1132 if (hotplug_status) 1133 i9xx_hpd_irq_handler(dev_priv, hotplug_status); 1134 1135 i915_pipestat_irq_handler(dev_priv, iir, pipe_stats); 1136 } while (0); 1137 1138 pmu_irq_stats(dev_priv, ret); 1139 1140 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1141 1142 return ret; 1143} 1144 1145static void i965_irq_reset(struct drm_i915_private *dev_priv) 1146{ 1147 struct intel_uncore *uncore = &dev_priv->uncore; 1148 1149 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0); 1150 intel_uncore_rmw(uncore, PORT_HOTPLUG_STAT, 0, 0); 1151 1152 i9xx_pipestat_irq_reset(dev_priv); 1153 1154 GEN3_IRQ_RESET(uncore, GEN2_); 1155 dev_priv->irq_mask = ~0u; 1156} 1157 1158static u32 i965_error_mask(struct drm_i915_private *i915) 1159{ 1160 /* 1161 * Enable some error detection, note the instruction error mask 1162 * bit is reserved, so we leave it masked. 1163 * 1164 * i965 FBC no longer generates spurious GTT errors, 1165 * so we can always enable the page table errors. 1166 */ 1167 if (IS_G4X(i915)) 1168 return ~(GM45_ERROR_PAGE_TABLE | 1169 GM45_ERROR_MEM_PRIV | 1170 GM45_ERROR_CP_PRIV | 1171 I915_ERROR_MEMORY_REFRESH); 1172 else 1173 return ~(I915_ERROR_PAGE_TABLE | 1174 I915_ERROR_MEMORY_REFRESH); 1175} 1176 1177static void i965_irq_postinstall(struct drm_i915_private *dev_priv) 1178{ 1179 struct intel_uncore *uncore = &dev_priv->uncore; 1180 u32 enable_mask; 1181 1182 intel_uncore_write(uncore, EMR, i965_error_mask(dev_priv)); 1183 1184 /* Unmask the interrupts that we always want on. */ 1185 dev_priv->irq_mask = 1186 ~(I915_ASLE_INTERRUPT | 1187 I915_DISPLAY_PORT_INTERRUPT | 1188 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 1189 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 1190 I915_MASTER_ERROR_INTERRUPT); 1191 1192 enable_mask = 1193 I915_ASLE_INTERRUPT | 1194 I915_DISPLAY_PORT_INTERRUPT | 1195 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 1196 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 1197 I915_MASTER_ERROR_INTERRUPT | 1198 I915_USER_INTERRUPT; 1199 1200 if (IS_G4X(dev_priv)) 1201 enable_mask |= I915_BSD_USER_INTERRUPT; 1202 1203 GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask); 1204 1205 /* Interrupt setup is already guaranteed to be single-threaded, this is 1206 * just to make the assert_spin_locked check happy. */ 1207 spin_lock_irq(&dev_priv->irq_lock); 1208 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS); 1209 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); 1210 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); 1211 spin_unlock_irq(&dev_priv->irq_lock); 1212 1213 i915_enable_asle_pipestat(dev_priv); 1214} 1215 1216static irqreturn_t i965_irq_handler(int irq, void *arg) 1217{ 1218 struct drm_i915_private *dev_priv = arg; 1219 irqreturn_t ret = IRQ_NONE; 1220 1221 if (!intel_irqs_enabled(dev_priv)) 1222 return IRQ_NONE; 1223 1224 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 1225 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1226 1227 do { 1228 u32 pipe_stats[I915_MAX_PIPES] = {}; 1229 u32 eir = 0, eir_stuck = 0; 1230 u32 hotplug_status = 0; 1231 u32 iir; 1232 1233 iir = intel_uncore_read(&dev_priv->uncore, GEN2_IIR); 1234 if (iir == 0) 1235 break; 1236 1237 ret = IRQ_HANDLED; 1238 1239 if (iir & I915_DISPLAY_PORT_INTERRUPT) 1240 hotplug_status = i9xx_hpd_irq_ack(dev_priv); 1241 1242 /* Call regardless, as some status bits might not be 1243 * signalled in iir */ 1244 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 1245 1246 if (iir & I915_MASTER_ERROR_INTERRUPT) 1247 i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck); 1248 1249 intel_uncore_write(&dev_priv->uncore, GEN2_IIR, iir); 1250 1251 if (iir & I915_USER_INTERRUPT) 1252 intel_engine_cs_irq(to_gt(dev_priv)->engine[RCS0], 1253 iir); 1254 1255 if (iir & I915_BSD_USER_INTERRUPT) 1256 intel_engine_cs_irq(to_gt(dev_priv)->engine[VCS0], 1257 iir >> 25); 1258 1259 if (iir & I915_MASTER_ERROR_INTERRUPT) 1260 i9xx_error_irq_handler(dev_priv, eir, eir_stuck); 1261 1262 if (hotplug_status) 1263 i9xx_hpd_irq_handler(dev_priv, hotplug_status); 1264 1265 i965_pipestat_irq_handler(dev_priv, iir, pipe_stats); 1266 } while (0); 1267 1268 pmu_irq_stats(dev_priv, IRQ_HANDLED); 1269 1270 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1271 1272 return ret; 1273} 1274 1275/** 1276 * intel_irq_init - initializes irq support 1277 * @dev_priv: i915 device instance 1278 * 1279 * This function initializes all the irq support including work items, timers 1280 * and all the vtables. It does not setup the interrupt itself though. 1281 */ 1282void intel_irq_init(struct drm_i915_private *dev_priv) 1283{ 1284 int i; 1285 1286 INIT_WORK(&dev_priv->l3_parity.error_work, ivb_parity_work); 1287 for (i = 0; i < MAX_L3_SLICES; ++i) 1288 dev_priv->l3_parity.remap_info[i] = NULL; 1289 1290 /* pre-gen11 the guc irqs bits are in the upper 16 bits of the pm reg */ 1291 if (HAS_GT_UC(dev_priv) && GRAPHICS_VER(dev_priv) < 11) 1292 to_gt(dev_priv)->pm_guc_events = GUC_INTR_GUC2HOST << 16; 1293} 1294 1295/** 1296 * intel_irq_fini - deinitializes IRQ support 1297 * @i915: i915 device instance 1298 * 1299 * This function deinitializes all the IRQ support. 1300 */ 1301void intel_irq_fini(struct drm_i915_private *i915) 1302{ 1303 int i; 1304 1305 for (i = 0; i < MAX_L3_SLICES; ++i) 1306 kfree(i915->l3_parity.remap_info[i]); 1307} 1308 1309static irq_handler_t intel_irq_handler(struct drm_i915_private *dev_priv) 1310{ 1311 if (HAS_GMCH(dev_priv)) { 1312 if (IS_CHERRYVIEW(dev_priv)) 1313 return cherryview_irq_handler; 1314 else if (IS_VALLEYVIEW(dev_priv)) 1315 return valleyview_irq_handler; 1316 else if (GRAPHICS_VER(dev_priv) == 4) 1317 return i965_irq_handler; 1318 else if (GRAPHICS_VER(dev_priv) == 3) 1319 return i915_irq_handler; 1320 else 1321 return i8xx_irq_handler; 1322 } else { 1323 if (GRAPHICS_VER_FULL(dev_priv) >= IP_VER(12, 10)) 1324 return dg1_irq_handler; 1325 else if (GRAPHICS_VER(dev_priv) >= 11) 1326 return gen11_irq_handler; 1327 else if (GRAPHICS_VER(dev_priv) >= 8) 1328 return gen8_irq_handler; 1329 else 1330 return ilk_irq_handler; 1331 } 1332} 1333 1334static void intel_irq_reset(struct drm_i915_private *dev_priv) 1335{ 1336 if (HAS_GMCH(dev_priv)) { 1337 if (IS_CHERRYVIEW(dev_priv)) 1338 cherryview_irq_reset(dev_priv); 1339 else if (IS_VALLEYVIEW(dev_priv)) 1340 valleyview_irq_reset(dev_priv); 1341 else if (GRAPHICS_VER(dev_priv) == 4) 1342 i965_irq_reset(dev_priv); 1343 else if (GRAPHICS_VER(dev_priv) == 3) 1344 i915_irq_reset(dev_priv); 1345 else 1346 i8xx_irq_reset(dev_priv); 1347 } else { 1348 if (GRAPHICS_VER_FULL(dev_priv) >= IP_VER(12, 10)) 1349 dg1_irq_reset(dev_priv); 1350 else if (GRAPHICS_VER(dev_priv) >= 11) 1351 gen11_irq_reset(dev_priv); 1352 else if (GRAPHICS_VER(dev_priv) >= 8) 1353 gen8_irq_reset(dev_priv); 1354 else 1355 ilk_irq_reset(dev_priv); 1356 } 1357} 1358 1359static void intel_irq_postinstall(struct drm_i915_private *dev_priv) 1360{ 1361 if (HAS_GMCH(dev_priv)) { 1362 if (IS_CHERRYVIEW(dev_priv)) 1363 cherryview_irq_postinstall(dev_priv); 1364 else if (IS_VALLEYVIEW(dev_priv)) 1365 valleyview_irq_postinstall(dev_priv); 1366 else if (GRAPHICS_VER(dev_priv) == 4) 1367 i965_irq_postinstall(dev_priv); 1368 else if (GRAPHICS_VER(dev_priv) == 3) 1369 i915_irq_postinstall(dev_priv); 1370 else 1371 i8xx_irq_postinstall(dev_priv); 1372 } else { 1373 if (GRAPHICS_VER_FULL(dev_priv) >= IP_VER(12, 10)) 1374 dg1_irq_postinstall(dev_priv); 1375 else if (GRAPHICS_VER(dev_priv) >= 11) 1376 gen11_irq_postinstall(dev_priv); 1377 else if (GRAPHICS_VER(dev_priv) >= 8) 1378 gen8_irq_postinstall(dev_priv); 1379 else 1380 ilk_irq_postinstall(dev_priv); 1381 } 1382} 1383 1384/** 1385 * intel_irq_install - enables the hardware interrupt 1386 * @dev_priv: i915 device instance 1387 * 1388 * This function enables the hardware interrupt handling, but leaves the hotplug 1389 * handling still disabled. It is called after intel_irq_init(). 1390 * 1391 * In the driver load and resume code we need working interrupts in a few places 1392 * but don't want to deal with the hassle of concurrent probe and hotplug 1393 * workers. Hence the split into this two-stage approach. 1394 */ 1395int intel_irq_install(struct drm_i915_private *dev_priv) 1396{ 1397 int irq = dev_priv->drm.pdev->irq; 1398 int ret; 1399 1400 /* 1401 * We enable some interrupt sources in our postinstall hooks, so mark 1402 * interrupts as enabled _before_ actually enabling them to avoid 1403 * special cases in our ordering checks. 1404 */ 1405 dev_priv->runtime_pm.irqs_enabled = true; 1406 1407 dev_priv->irq_enabled = true; 1408 1409 intel_irq_reset(dev_priv); 1410 1411 ret = request_irq(irq, intel_irq_handler(dev_priv), 1412 IRQF_SHARED, DRIVER_NAME, dev_priv); 1413 if (ret < 0) { 1414 dev_priv->irq_enabled = false; 1415 return ret; 1416 } 1417#ifdef __OpenBSD__ 1418 dev_priv->irq_handler = intel_irq_handler(dev_priv); 1419#endif 1420 1421 intel_irq_postinstall(dev_priv); 1422 1423 return ret; 1424} 1425 1426/** 1427 * intel_irq_uninstall - finilizes all irq handling 1428 * @dev_priv: i915 device instance 1429 * 1430 * This stops interrupt and hotplug handling and unregisters and frees all 1431 * resources acquired in the init functions. 1432 */ 1433void intel_irq_uninstall(struct drm_i915_private *dev_priv) 1434{ 1435 int irq = dev_priv->drm.pdev->irq; 1436 1437 /* 1438 * FIXME we can get called twice during driver probe 1439 * error handling as well as during driver remove due to 1440 * intel_display_driver_remove() calling us out of sequence. 1441 * Would be nice if it didn't do that... 1442 */ 1443 if (!dev_priv->irq_enabled) 1444 return; 1445 1446 dev_priv->irq_enabled = false; 1447 1448 intel_irq_reset(dev_priv); 1449 1450 free_irq(irq, dev_priv); 1451#ifdef __OpenBSD__ 1452 dev_priv->irq_handler = NULL; 1453#endif 1454 1455 intel_hpd_cancel_work(dev_priv); 1456 dev_priv->runtime_pm.irqs_enabled = false; 1457} 1458 1459/** 1460 * intel_runtime_pm_disable_interrupts - runtime interrupt disabling 1461 * @dev_priv: i915 device instance 1462 * 1463 * This function is used to disable interrupts at runtime, both in the runtime 1464 * pm and the system suspend/resume code. 1465 */ 1466void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv) 1467{ 1468 intel_irq_reset(dev_priv); 1469 dev_priv->runtime_pm.irqs_enabled = false; 1470 intel_synchronize_irq(dev_priv); 1471} 1472 1473/** 1474 * intel_runtime_pm_enable_interrupts - runtime interrupt enabling 1475 * @dev_priv: i915 device instance 1476 * 1477 * This function is used to enable interrupts at runtime, both in the runtime 1478 * pm and the system suspend/resume code. 1479 */ 1480void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv) 1481{ 1482 dev_priv->runtime_pm.irqs_enabled = true; 1483 intel_irq_reset(dev_priv); 1484 intel_irq_postinstall(dev_priv); 1485} 1486 1487bool intel_irqs_enabled(struct drm_i915_private *dev_priv) 1488{ 1489 return dev_priv->runtime_pm.irqs_enabled; 1490} 1491 1492void intel_synchronize_irq(struct drm_i915_private *i915) 1493{ 1494#ifdef __linux__ 1495 synchronize_irq(to_pci_dev(i915->drm.dev)->irq); 1496#else 1497 intr_barrier(i915->irqh); 1498#endif 1499} 1500 1501void intel_synchronize_hardirq(struct drm_i915_private *i915) 1502{ 1503#ifdef __linux__ 1504 synchronize_hardirq(to_pci_dev(i915->drm.dev)->irq); 1505#else 1506 intr_barrier(i915->irqh); 1507#endif 1508} 1509