| 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 | #ifdef __NetBSD__ |
| 32 | #include <sys/cdefs.h> |
| 33 | #endif |
| 34 | |
| 35 | #include <linux/printk.h> |
| 36 | #include <linux/sysrq.h> |
| 37 | #include <linux/slab.h> |
| 38 | #ifdef CONFIG_DEBUG_FS |
| 39 | #include <linux/circ_buf.h> |
| 40 | #endif |
| 41 | #include <drm/drmP.h> |
| 42 | #include <drm/i915_drm.h> |
| 43 | #include "i915_drv.h" |
| 44 | #include "i915_trace.h" |
| 45 | #include "intel_drv.h" |
| 46 | |
| 47 | static const u32 hpd_ibx[] = { |
| 48 | [HPD_CRT] = SDE_CRT_HOTPLUG, |
| 49 | [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG, |
| 50 | [HPD_PORT_B] = SDE_PORTB_HOTPLUG, |
| 51 | [HPD_PORT_C] = SDE_PORTC_HOTPLUG, |
| 52 | [HPD_PORT_D] = SDE_PORTD_HOTPLUG |
| 53 | }; |
| 54 | |
| 55 | static const u32 hpd_cpt[] = { |
| 56 | [HPD_CRT] = SDE_CRT_HOTPLUG_CPT, |
| 57 | [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT, |
| 58 | [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT, |
| 59 | [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT, |
| 60 | [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT |
| 61 | }; |
| 62 | |
| 63 | static const u32 hpd_mask_i915[] = { |
| 64 | [HPD_CRT] = CRT_HOTPLUG_INT_EN, |
| 65 | [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN, |
| 66 | [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN, |
| 67 | [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN, |
| 68 | [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN, |
| 69 | [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN |
| 70 | }; |
| 71 | |
| 72 | static const u32 hpd_status_g4x[] = { |
| 73 | [HPD_CRT] = CRT_HOTPLUG_INT_STATUS, |
| 74 | [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X, |
| 75 | [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X, |
| 76 | [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS, |
| 77 | [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS, |
| 78 | [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS |
| 79 | }; |
| 80 | |
| 81 | static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */ |
| 82 | [HPD_CRT] = CRT_HOTPLUG_INT_STATUS, |
| 83 | [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915, |
| 84 | [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915, |
| 85 | [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS, |
| 86 | [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS, |
| 87 | [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS |
| 88 | }; |
| 89 | |
| 90 | /* For display hotplug interrupt */ |
| 91 | static void |
| 92 | ironlake_enable_display_irq(struct drm_i915_private *dev_priv, u32 mask) |
| 93 | { |
| 94 | assert_spin_locked(&dev_priv->irq_lock); |
| 95 | |
| 96 | if (dev_priv->pm.irqs_disabled) { |
| 97 | WARN(1, "IRQs disabled\n" ); |
| 98 | dev_priv->pm.regsave.deimr &= ~mask; |
| 99 | return; |
| 100 | } |
| 101 | |
| 102 | if ((dev_priv->irq_mask & mask) != 0) { |
| 103 | dev_priv->irq_mask &= ~mask; |
| 104 | I915_WRITE(DEIMR, dev_priv->irq_mask); |
| 105 | POSTING_READ(DEIMR); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | static void |
| 110 | ironlake_disable_display_irq(struct drm_i915_private *dev_priv, u32 mask) |
| 111 | { |
| 112 | assert_spin_locked(&dev_priv->irq_lock); |
| 113 | |
| 114 | if (dev_priv->pm.irqs_disabled) { |
| 115 | WARN(1, "IRQs disabled\n" ); |
| 116 | dev_priv->pm.regsave.deimr |= mask; |
| 117 | return; |
| 118 | } |
| 119 | |
| 120 | if ((dev_priv->irq_mask & mask) != mask) { |
| 121 | dev_priv->irq_mask |= mask; |
| 122 | I915_WRITE(DEIMR, dev_priv->irq_mask); |
| 123 | POSTING_READ(DEIMR); |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * ilk_update_gt_irq - update GTIMR |
| 129 | * @dev_priv: driver private |
| 130 | * @interrupt_mask: mask of interrupt bits to update |
| 131 | * @enabled_irq_mask: mask of interrupt bits to enable |
| 132 | */ |
| 133 | static void ilk_update_gt_irq(struct drm_i915_private *dev_priv, |
| 134 | uint32_t interrupt_mask, |
| 135 | uint32_t enabled_irq_mask) |
| 136 | { |
| 137 | assert_spin_locked(&dev_priv->irq_lock); |
| 138 | |
| 139 | if (dev_priv->pm.irqs_disabled) { |
| 140 | WARN(1, "IRQs disabled\n" ); |
| 141 | dev_priv->pm.regsave.gtimr &= ~interrupt_mask; |
| 142 | dev_priv->pm.regsave.gtimr |= (~enabled_irq_mask & |
| 143 | interrupt_mask); |
| 144 | return; |
| 145 | } |
| 146 | |
| 147 | dev_priv->gt_irq_mask &= ~interrupt_mask; |
| 148 | dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask); |
| 149 | I915_WRITE(GTIMR, dev_priv->gt_irq_mask); |
| 150 | POSTING_READ(GTIMR); |
| 151 | } |
| 152 | |
| 153 | void ilk_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask) |
| 154 | { |
| 155 | ilk_update_gt_irq(dev_priv, mask, mask); |
| 156 | } |
| 157 | |
| 158 | void ilk_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask) |
| 159 | { |
| 160 | ilk_update_gt_irq(dev_priv, mask, 0); |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * snb_update_pm_irq - update GEN6_PMIMR |
| 165 | * @dev_priv: driver private |
| 166 | * @interrupt_mask: mask of interrupt bits to update |
| 167 | * @enabled_irq_mask: mask of interrupt bits to enable |
| 168 | */ |
| 169 | static void snb_update_pm_irq(struct drm_i915_private *dev_priv, |
| 170 | uint32_t interrupt_mask, |
| 171 | uint32_t enabled_irq_mask) |
| 172 | { |
| 173 | uint32_t new_val; |
| 174 | |
| 175 | assert_spin_locked(&dev_priv->irq_lock); |
| 176 | |
| 177 | if (dev_priv->pm.irqs_disabled) { |
| 178 | WARN(1, "IRQs disabled\n" ); |
| 179 | dev_priv->pm.regsave.gen6_pmimr &= ~interrupt_mask; |
| 180 | dev_priv->pm.regsave.gen6_pmimr |= (~enabled_irq_mask & |
| 181 | interrupt_mask); |
| 182 | return; |
| 183 | } |
| 184 | |
| 185 | new_val = dev_priv->pm_irq_mask; |
| 186 | new_val &= ~interrupt_mask; |
| 187 | new_val |= (~enabled_irq_mask & interrupt_mask); |
| 188 | |
| 189 | if (new_val != dev_priv->pm_irq_mask) { |
| 190 | dev_priv->pm_irq_mask = new_val; |
| 191 | I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask); |
| 192 | POSTING_READ(GEN6_PMIMR); |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | void snb_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask) |
| 197 | { |
| 198 | snb_update_pm_irq(dev_priv, mask, mask); |
| 199 | } |
| 200 | |
| 201 | void snb_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask) |
| 202 | { |
| 203 | snb_update_pm_irq(dev_priv, mask, 0); |
| 204 | } |
| 205 | |
| 206 | static bool ivb_can_enable_err_int(struct drm_device *dev) |
| 207 | { |
| 208 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 209 | struct intel_crtc *crtc; |
| 210 | enum i915_pipe pipe; |
| 211 | |
| 212 | assert_spin_locked(&dev_priv->irq_lock); |
| 213 | |
| 214 | for_each_pipe(pipe) { |
| 215 | crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]); |
| 216 | |
| 217 | if (crtc->cpu_fifo_underrun_disabled) |
| 218 | return false; |
| 219 | } |
| 220 | |
| 221 | return true; |
| 222 | } |
| 223 | |
| 224 | static bool cpt_can_enable_serr_int(struct drm_device *dev) |
| 225 | { |
| 226 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 227 | enum i915_pipe pipe; |
| 228 | struct intel_crtc *crtc; |
| 229 | |
| 230 | assert_spin_locked(&dev_priv->irq_lock); |
| 231 | |
| 232 | for_each_pipe(pipe) { |
| 233 | crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]); |
| 234 | |
| 235 | if (crtc->pch_fifo_underrun_disabled) |
| 236 | return false; |
| 237 | } |
| 238 | |
| 239 | return true; |
| 240 | } |
| 241 | |
| 242 | static void i9xx_clear_fifo_underrun(struct drm_device *dev, enum i915_pipe pipe) |
| 243 | { |
| 244 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 245 | u32 reg = PIPESTAT(pipe); |
| 246 | u32 pipestat = I915_READ(reg) & 0x7fff0000; |
| 247 | |
| 248 | assert_spin_locked(&dev_priv->irq_lock); |
| 249 | |
| 250 | I915_WRITE(reg, pipestat | PIPE_FIFO_UNDERRUN_STATUS); |
| 251 | POSTING_READ(reg); |
| 252 | } |
| 253 | |
| 254 | static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev, |
| 255 | enum i915_pipe pipe, bool enable) |
| 256 | { |
| 257 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 258 | uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN : |
| 259 | DE_PIPEB_FIFO_UNDERRUN; |
| 260 | |
| 261 | if (enable) |
| 262 | ironlake_enable_display_irq(dev_priv, bit); |
| 263 | else |
| 264 | ironlake_disable_display_irq(dev_priv, bit); |
| 265 | } |
| 266 | |
| 267 | static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev, |
| 268 | enum i915_pipe pipe, bool enable) |
| 269 | { |
| 270 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 271 | if (enable) { |
| 272 | I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN(pipe)); |
| 273 | |
| 274 | if (!ivb_can_enable_err_int(dev)) |
| 275 | return; |
| 276 | |
| 277 | ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB); |
| 278 | } else { |
| 279 | bool was_enabled = !(I915_READ(DEIMR) & DE_ERR_INT_IVB); |
| 280 | |
| 281 | /* Change the state _after_ we've read out the current one. */ |
| 282 | ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB); |
| 283 | |
| 284 | if (!was_enabled && |
| 285 | (I915_READ(GEN7_ERR_INT) & ERR_INT_FIFO_UNDERRUN(pipe))) { |
| 286 | DRM_DEBUG_KMS("uncleared fifo underrun on pipe %c\n" , |
| 287 | pipe_name(pipe)); |
| 288 | } |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | static void broadwell_set_fifo_underrun_reporting(struct drm_device *dev, |
| 293 | enum i915_pipe pipe, bool enable) |
| 294 | { |
| 295 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 296 | |
| 297 | assert_spin_locked(&dev_priv->irq_lock); |
| 298 | |
| 299 | if (enable) |
| 300 | dev_priv->de_irq_mask[pipe] &= ~GEN8_PIPE_FIFO_UNDERRUN; |
| 301 | else |
| 302 | dev_priv->de_irq_mask[pipe] |= GEN8_PIPE_FIFO_UNDERRUN; |
| 303 | I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]); |
| 304 | POSTING_READ(GEN8_DE_PIPE_IMR(pipe)); |
| 305 | } |
| 306 | |
| 307 | /** |
| 308 | * ibx_display_interrupt_update - update SDEIMR |
| 309 | * @dev_priv: driver private |
| 310 | * @interrupt_mask: mask of interrupt bits to update |
| 311 | * @enabled_irq_mask: mask of interrupt bits to enable |
| 312 | */ |
| 313 | static void ibx_display_interrupt_update(struct drm_i915_private *dev_priv, |
| 314 | uint32_t interrupt_mask, |
| 315 | uint32_t enabled_irq_mask) |
| 316 | { |
| 317 | uint32_t sdeimr = I915_READ(SDEIMR); |
| 318 | sdeimr &= ~interrupt_mask; |
| 319 | sdeimr |= (~enabled_irq_mask & interrupt_mask); |
| 320 | |
| 321 | assert_spin_locked(&dev_priv->irq_lock); |
| 322 | |
| 323 | if (dev_priv->pm.irqs_disabled && |
| 324 | (interrupt_mask & SDE_HOTPLUG_MASK_CPT)) { |
| 325 | WARN(1, "IRQs disabled\n" ); |
| 326 | dev_priv->pm.regsave.sdeimr &= ~interrupt_mask; |
| 327 | dev_priv->pm.regsave.sdeimr |= (~enabled_irq_mask & |
| 328 | interrupt_mask); |
| 329 | return; |
| 330 | } |
| 331 | |
| 332 | I915_WRITE(SDEIMR, sdeimr); |
| 333 | POSTING_READ(SDEIMR); |
| 334 | } |
| 335 | #define ibx_enable_display_interrupt(dev_priv, bits) \ |
| 336 | ibx_display_interrupt_update((dev_priv), (bits), (bits)) |
| 337 | #define ibx_disable_display_interrupt(dev_priv, bits) \ |
| 338 | ibx_display_interrupt_update((dev_priv), (bits), 0) |
| 339 | |
| 340 | static void ibx_set_fifo_underrun_reporting(struct drm_device *dev, |
| 341 | enum transcoder pch_transcoder, |
| 342 | bool enable) |
| 343 | { |
| 344 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 345 | uint32_t bit = (pch_transcoder == TRANSCODER_A) ? |
| 346 | SDE_TRANSA_FIFO_UNDER : SDE_TRANSB_FIFO_UNDER; |
| 347 | |
| 348 | if (enable) |
| 349 | ibx_enable_display_interrupt(dev_priv, bit); |
| 350 | else |
| 351 | ibx_disable_display_interrupt(dev_priv, bit); |
| 352 | } |
| 353 | |
| 354 | static void cpt_set_fifo_underrun_reporting(struct drm_device *dev, |
| 355 | enum transcoder pch_transcoder, |
| 356 | bool enable) |
| 357 | { |
| 358 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 359 | |
| 360 | if (enable) { |
| 361 | I915_WRITE(SERR_INT, |
| 362 | SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder)); |
| 363 | |
| 364 | if (!cpt_can_enable_serr_int(dev)) |
| 365 | return; |
| 366 | |
| 367 | ibx_enable_display_interrupt(dev_priv, SDE_ERROR_CPT); |
| 368 | } else { |
| 369 | uint32_t tmp = I915_READ(SERR_INT); |
| 370 | bool was_enabled = !(I915_READ(SDEIMR) & SDE_ERROR_CPT); |
| 371 | |
| 372 | /* Change the state _after_ we've read out the current one. */ |
| 373 | ibx_disable_display_interrupt(dev_priv, SDE_ERROR_CPT); |
| 374 | |
| 375 | if (!was_enabled && |
| 376 | (tmp & SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder))) { |
| 377 | DRM_DEBUG_KMS("uncleared pch fifo underrun on pch transcoder %c\n" , |
| 378 | transcoder_name(pch_transcoder)); |
| 379 | } |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | /** |
| 384 | * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages |
| 385 | * @dev: drm device |
| 386 | * @pipe: pipe |
| 387 | * @enable: true if we want to report FIFO underrun errors, false otherwise |
| 388 | * |
| 389 | * This function makes us disable or enable CPU fifo underruns for a specific |
| 390 | * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun |
| 391 | * reporting for one pipe may also disable all the other CPU error interruts for |
| 392 | * the other pipes, due to the fact that there's just one interrupt mask/enable |
| 393 | * bit for all the pipes. |
| 394 | * |
| 395 | * Returns the previous state of underrun reporting. |
| 396 | */ |
| 397 | bool __intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev, |
| 398 | enum i915_pipe pipe, bool enable) |
| 399 | { |
| 400 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 401 | struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; |
| 402 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| 403 | bool ret; |
| 404 | |
| 405 | assert_spin_locked(&dev_priv->irq_lock); |
| 406 | |
| 407 | ret = !intel_crtc->cpu_fifo_underrun_disabled; |
| 408 | |
| 409 | if (enable == ret) |
| 410 | goto done; |
| 411 | |
| 412 | intel_crtc->cpu_fifo_underrun_disabled = !enable; |
| 413 | |
| 414 | if (enable && (INTEL_INFO(dev)->gen < 5 || IS_VALLEYVIEW(dev))) |
| 415 | i9xx_clear_fifo_underrun(dev, pipe); |
| 416 | else if (IS_GEN5(dev) || IS_GEN6(dev)) |
| 417 | ironlake_set_fifo_underrun_reporting(dev, pipe, enable); |
| 418 | else if (IS_GEN7(dev)) |
| 419 | ivybridge_set_fifo_underrun_reporting(dev, pipe, enable); |
| 420 | else if (IS_GEN8(dev)) |
| 421 | broadwell_set_fifo_underrun_reporting(dev, pipe, enable); |
| 422 | |
| 423 | done: |
| 424 | return ret; |
| 425 | } |
| 426 | |
| 427 | bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev, |
| 428 | enum i915_pipe pipe, bool enable) |
| 429 | { |
| 430 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 431 | unsigned long flags; |
| 432 | bool ret; |
| 433 | |
| 434 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 435 | ret = __intel_set_cpu_fifo_underrun_reporting(dev, pipe, enable); |
| 436 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 437 | |
| 438 | return ret; |
| 439 | } |
| 440 | |
| 441 | static bool __cpu_fifo_underrun_reporting_enabled(struct drm_device *dev, |
| 442 | enum i915_pipe pipe) |
| 443 | { |
| 444 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 445 | struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; |
| 446 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| 447 | |
| 448 | return !intel_crtc->cpu_fifo_underrun_disabled; |
| 449 | } |
| 450 | |
| 451 | /** |
| 452 | * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages |
| 453 | * @dev: drm device |
| 454 | * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older) |
| 455 | * @enable: true if we want to report FIFO underrun errors, false otherwise |
| 456 | * |
| 457 | * This function makes us disable or enable PCH fifo underruns for a specific |
| 458 | * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO |
| 459 | * underrun reporting for one transcoder may also disable all the other PCH |
| 460 | * error interruts for the other transcoders, due to the fact that there's just |
| 461 | * one interrupt mask/enable bit for all the transcoders. |
| 462 | * |
| 463 | * Returns the previous state of underrun reporting. |
| 464 | */ |
| 465 | bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev, |
| 466 | enum transcoder pch_transcoder, |
| 467 | bool enable) |
| 468 | { |
| 469 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 470 | struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder]; |
| 471 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| 472 | unsigned long flags; |
| 473 | bool ret; |
| 474 | |
| 475 | /* |
| 476 | * NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT |
| 477 | * has only one pch transcoder A that all pipes can use. To avoid racy |
| 478 | * pch transcoder -> pipe lookups from interrupt code simply store the |
| 479 | * underrun statistics in crtc A. Since we never expose this anywhere |
| 480 | * nor use it outside of the fifo underrun code here using the "wrong" |
| 481 | * crtc on LPT won't cause issues. |
| 482 | */ |
| 483 | |
| 484 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 485 | |
| 486 | ret = !intel_crtc->pch_fifo_underrun_disabled; |
| 487 | |
| 488 | if (enable == ret) |
| 489 | goto done; |
| 490 | |
| 491 | intel_crtc->pch_fifo_underrun_disabled = !enable; |
| 492 | |
| 493 | if (HAS_PCH_IBX(dev)) |
| 494 | ibx_set_fifo_underrun_reporting(dev, pch_transcoder, enable); |
| 495 | else |
| 496 | cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable); |
| 497 | |
| 498 | done: |
| 499 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 500 | return ret; |
| 501 | } |
| 502 | |
| 503 | |
| 504 | static void |
| 505 | __i915_enable_pipestat(struct drm_i915_private *dev_priv, enum i915_pipe pipe, |
| 506 | u32 enable_mask, u32 status_mask) |
| 507 | { |
| 508 | u32 reg = PIPESTAT(pipe); |
| 509 | u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK; |
| 510 | |
| 511 | assert_spin_locked(&dev_priv->irq_lock); |
| 512 | |
| 513 | if (WARN_ON_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK || |
| 514 | status_mask & ~PIPESTAT_INT_STATUS_MASK)) |
| 515 | return; |
| 516 | |
| 517 | if ((pipestat & enable_mask) == enable_mask) |
| 518 | return; |
| 519 | |
| 520 | dev_priv->pipestat_irq_mask[pipe] |= status_mask; |
| 521 | |
| 522 | /* Enable the interrupt, clear any pending status */ |
| 523 | pipestat |= enable_mask | status_mask; |
| 524 | I915_WRITE(reg, pipestat); |
| 525 | POSTING_READ(reg); |
| 526 | } |
| 527 | |
| 528 | static void |
| 529 | __i915_disable_pipestat(struct drm_i915_private *dev_priv, enum i915_pipe pipe, |
| 530 | u32 enable_mask, u32 status_mask) |
| 531 | { |
| 532 | u32 reg = PIPESTAT(pipe); |
| 533 | u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK; |
| 534 | |
| 535 | assert_spin_locked(&dev_priv->irq_lock); |
| 536 | |
| 537 | if (WARN_ON_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK || |
| 538 | status_mask & ~PIPESTAT_INT_STATUS_MASK)) |
| 539 | return; |
| 540 | |
| 541 | if ((pipestat & enable_mask) == 0) |
| 542 | return; |
| 543 | |
| 544 | dev_priv->pipestat_irq_mask[pipe] &= ~status_mask; |
| 545 | |
| 546 | pipestat &= ~enable_mask; |
| 547 | I915_WRITE(reg, pipestat); |
| 548 | POSTING_READ(reg); |
| 549 | } |
| 550 | |
| 551 | static u32 vlv_get_pipestat_enable_mask(struct drm_device *dev, u32 status_mask) |
| 552 | { |
| 553 | u32 enable_mask = status_mask << 16; |
| 554 | |
| 555 | /* |
| 556 | * On pipe A we don't support the PSR interrupt yet, on pipe B the |
| 557 | * same bit MBZ. |
| 558 | */ |
| 559 | if (WARN_ON_ONCE(status_mask & PIPE_A_PSR_STATUS_VLV)) |
| 560 | return 0; |
| 561 | |
| 562 | enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS | |
| 563 | SPRITE0_FLIP_DONE_INT_EN_VLV | |
| 564 | SPRITE1_FLIP_DONE_INT_EN_VLV); |
| 565 | if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV) |
| 566 | enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV; |
| 567 | if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV) |
| 568 | enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV; |
| 569 | |
| 570 | return enable_mask; |
| 571 | } |
| 572 | |
| 573 | void |
| 574 | i915_enable_pipestat(struct drm_i915_private *dev_priv, enum i915_pipe pipe, |
| 575 | u32 status_mask) |
| 576 | { |
| 577 | u32 enable_mask; |
| 578 | |
| 579 | if (IS_VALLEYVIEW(dev_priv->dev)) |
| 580 | enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev, |
| 581 | status_mask); |
| 582 | else |
| 583 | enable_mask = status_mask << 16; |
| 584 | __i915_enable_pipestat(dev_priv, pipe, enable_mask, status_mask); |
| 585 | } |
| 586 | |
| 587 | void |
| 588 | i915_disable_pipestat(struct drm_i915_private *dev_priv, enum i915_pipe pipe, |
| 589 | u32 status_mask) |
| 590 | { |
| 591 | u32 enable_mask; |
| 592 | |
| 593 | if (IS_VALLEYVIEW(dev_priv->dev)) |
| 594 | enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev, |
| 595 | status_mask); |
| 596 | else |
| 597 | enable_mask = status_mask << 16; |
| 598 | __i915_disable_pipestat(dev_priv, pipe, enable_mask, status_mask); |
| 599 | } |
| 600 | |
| 601 | /** |
| 602 | * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion |
| 603 | */ |
| 604 | static void i915_enable_asle_pipestat(struct drm_device *dev) |
| 605 | { |
| 606 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 607 | unsigned long irqflags; |
| 608 | |
| 609 | if (!dev_priv->opregion.asle || !IS_MOBILE(dev)) |
| 610 | return; |
| 611 | |
| 612 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 613 | |
| 614 | i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_STATUS); |
| 615 | if (INTEL_INFO(dev)->gen >= 4) |
| 616 | i915_enable_pipestat(dev_priv, PIPE_A, |
| 617 | PIPE_LEGACY_BLC_EVENT_STATUS); |
| 618 | |
| 619 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 620 | } |
| 621 | |
| 622 | /** |
| 623 | * i915_pipe_enabled - check if a pipe is enabled |
| 624 | * @dev: DRM device |
| 625 | * @pipe: pipe to check |
| 626 | * |
| 627 | * Reading certain registers when the pipe is disabled can hang the chip. |
| 628 | * Use this routine to make sure the PLL is running and the pipe is active |
| 629 | * before reading such registers if unsure. |
| 630 | */ |
| 631 | static int |
| 632 | i915_pipe_enabled(struct drm_device *dev, int pipe) |
| 633 | { |
| 634 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 635 | |
| 636 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 637 | /* Locking is horribly broken here, but whatever. */ |
| 638 | struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; |
| 639 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| 640 | |
| 641 | return intel_crtc->active; |
| 642 | } else { |
| 643 | return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE; |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | static u32 i8xx_get_vblank_counter(struct drm_device *dev, int pipe) |
| 648 | { |
| 649 | /* Gen2 doesn't have a hardware frame counter */ |
| 650 | return 0; |
| 651 | } |
| 652 | |
| 653 | /* Called from drm generic code, passed a 'crtc', which |
| 654 | * we use as a pipe index |
| 655 | */ |
| 656 | static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe) |
| 657 | { |
| 658 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 659 | unsigned long high_frame; |
| 660 | unsigned long low_frame; |
| 661 | u32 high1, high2, low, pixel, vbl_start; |
| 662 | |
| 663 | if (!i915_pipe_enabled(dev, pipe)) { |
| 664 | DRM_DEBUG_DRIVER("trying to get vblank count for disabled " |
| 665 | "pipe %c\n" , pipe_name(pipe)); |
| 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 670 | struct intel_crtc *intel_crtc = |
| 671 | to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]); |
| 672 | const struct drm_display_mode *mode = |
| 673 | &intel_crtc->config.adjusted_mode; |
| 674 | |
| 675 | vbl_start = mode->crtc_vblank_start * mode->crtc_htotal; |
| 676 | } else { |
| 677 | enum transcoder cpu_transcoder = (enum transcoder) pipe; |
| 678 | u32 htotal; |
| 679 | |
| 680 | htotal = ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff) + 1; |
| 681 | vbl_start = (I915_READ(VBLANK(cpu_transcoder)) & 0x1fff) + 1; |
| 682 | |
| 683 | vbl_start *= htotal; |
| 684 | } |
| 685 | |
| 686 | high_frame = PIPEFRAME(pipe); |
| 687 | low_frame = PIPEFRAMEPIXEL(pipe); |
| 688 | |
| 689 | /* |
| 690 | * High & low register fields aren't synchronized, so make sure |
| 691 | * we get a low value that's stable across two reads of the high |
| 692 | * register. |
| 693 | */ |
| 694 | do { |
| 695 | high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK; |
| 696 | low = I915_READ(low_frame); |
| 697 | high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK; |
| 698 | } while (high1 != high2); |
| 699 | |
| 700 | high1 >>= PIPE_FRAME_HIGH_SHIFT; |
| 701 | pixel = low & PIPE_PIXEL_MASK; |
| 702 | low >>= PIPE_FRAME_LOW_SHIFT; |
| 703 | |
| 704 | /* |
| 705 | * The frame counter increments at beginning of active. |
| 706 | * Cook up a vblank counter by also checking the pixel |
| 707 | * counter against vblank start. |
| 708 | */ |
| 709 | return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff; |
| 710 | } |
| 711 | |
| 712 | static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe) |
| 713 | { |
| 714 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 715 | int reg = PIPE_FRMCOUNT_GM45(pipe); |
| 716 | |
| 717 | if (!i915_pipe_enabled(dev, pipe)) { |
| 718 | DRM_DEBUG_DRIVER("trying to get vblank count for disabled " |
| 719 | "pipe %c\n" , pipe_name(pipe)); |
| 720 | return 0; |
| 721 | } |
| 722 | |
| 723 | return I915_READ(reg); |
| 724 | } |
| 725 | |
| 726 | /* raw reads, only for fast reads of display block, no need for forcewake etc. */ |
| 727 | #ifdef __NetBSD__ |
| 728 | #define __raw_i915_read32(dev_priv, reg) bus_space_read_4((dev_priv)->regs_bst, (dev_priv)->regs_bsh, (reg)) |
| 729 | #else |
| 730 | #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__)) |
| 731 | #endif |
| 732 | |
| 733 | static bool ilk_pipe_in_vblank_locked(struct drm_device *dev, enum i915_pipe pipe) |
| 734 | { |
| 735 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 736 | uint32_t status; |
| 737 | int reg; |
| 738 | |
| 739 | if (INTEL_INFO(dev)->gen >= 8) { |
| 740 | status = GEN8_PIPE_VBLANK; |
| 741 | reg = GEN8_DE_PIPE_ISR(pipe); |
| 742 | } else if (INTEL_INFO(dev)->gen >= 7) { |
| 743 | status = DE_PIPE_VBLANK_IVB(pipe); |
| 744 | reg = DEISR; |
| 745 | } else { |
| 746 | status = DE_PIPE_VBLANK(pipe); |
| 747 | reg = DEISR; |
| 748 | } |
| 749 | |
| 750 | return __raw_i915_read32(dev_priv, reg) & status; |
| 751 | } |
| 752 | |
| 753 | static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe, |
| 754 | unsigned int flags, int *vpos, int *hpos, |
| 755 | ktime_t *stime, ktime_t *etime) |
| 756 | { |
| 757 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 758 | struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; |
| 759 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| 760 | const struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode; |
| 761 | int position; |
| 762 | int vbl_start, vbl_end, htotal, vtotal; |
| 763 | bool in_vbl = true; |
| 764 | int ret = 0; |
| 765 | unsigned long irqflags; |
| 766 | |
| 767 | if (!intel_crtc->active) { |
| 768 | DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled " |
| 769 | "pipe %c\n" , pipe_name(pipe)); |
| 770 | return 0; |
| 771 | } |
| 772 | |
| 773 | htotal = mode->crtc_htotal; |
| 774 | vtotal = mode->crtc_vtotal; |
| 775 | vbl_start = mode->crtc_vblank_start; |
| 776 | vbl_end = mode->crtc_vblank_end; |
| 777 | |
| 778 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) { |
| 779 | vbl_start = DIV_ROUND_UP(vbl_start, 2); |
| 780 | vbl_end /= 2; |
| 781 | vtotal /= 2; |
| 782 | } |
| 783 | |
| 784 | ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE; |
| 785 | |
| 786 | /* |
| 787 | * Lock uncore.lock, as we will do multiple timing critical raw |
| 788 | * register reads, potentially with preemption disabled, so the |
| 789 | * following code must not block on uncore.lock. |
| 790 | */ |
| 791 | spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); |
| 792 | |
| 793 | /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */ |
| 794 | |
| 795 | /* Get optional system timestamp before query. */ |
| 796 | if (stime) |
| 797 | *stime = ktime_get(); |
| 798 | |
| 799 | if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { |
| 800 | /* No obvious pixelcount register. Only query vertical |
| 801 | * scanout position from Display scan line register. |
| 802 | */ |
| 803 | if (IS_GEN2(dev)) |
| 804 | position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN2; |
| 805 | else |
| 806 | position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN3; |
| 807 | |
| 808 | if (HAS_DDI(dev)) { |
| 809 | /* |
| 810 | * On HSW HDMI outputs there seems to be a 2 line |
| 811 | * difference, whereas eDP has the normal 1 line |
| 812 | * difference that earlier platforms have. External |
| 813 | * DP is unknown. For now just check for the 2 line |
| 814 | * difference case on all output types on HSW+. |
| 815 | * |
| 816 | * This might misinterpret the scanline counter being |
| 817 | * one line too far along on eDP, but that's less |
| 818 | * dangerous than the alternative since that would lead |
| 819 | * the vblank timestamp code astray when it sees a |
| 820 | * scanline count before vblank_start during a vblank |
| 821 | * interrupt. |
| 822 | */ |
| 823 | in_vbl = ilk_pipe_in_vblank_locked(dev, pipe); |
| 824 | if ((in_vbl && (position == vbl_start - 2 || |
| 825 | position == vbl_start - 1)) || |
| 826 | (!in_vbl && (position == vbl_end - 2 || |
| 827 | position == vbl_end - 1))) |
| 828 | position = (position + 2) % vtotal; |
| 829 | } else if (HAS_PCH_SPLIT(dev)) { |
| 830 | /* |
| 831 | * The scanline counter increments at the leading edge |
| 832 | * of hsync, ie. it completely misses the active portion |
| 833 | * of the line. Fix up the counter at both edges of vblank |
| 834 | * to get a more accurate picture whether we're in vblank |
| 835 | * or not. |
| 836 | */ |
| 837 | in_vbl = ilk_pipe_in_vblank_locked(dev, pipe); |
| 838 | if ((in_vbl && position == vbl_start - 1) || |
| 839 | (!in_vbl && position == vbl_end - 1)) |
| 840 | position = (position + 1) % vtotal; |
| 841 | } else { |
| 842 | /* |
| 843 | * ISR vblank status bits don't work the way we'd want |
| 844 | * them to work on non-PCH platforms (for |
| 845 | * ilk_pipe_in_vblank_locked()), and there doesn't |
| 846 | * appear any other way to determine if we're currently |
| 847 | * in vblank. |
| 848 | * |
| 849 | * Instead let's assume that we're already in vblank if |
| 850 | * we got called from the vblank interrupt and the |
| 851 | * scanline counter value indicates that we're on the |
| 852 | * line just prior to vblank start. This should result |
| 853 | * in the correct answer, unless the vblank interrupt |
| 854 | * delivery really got delayed for almost exactly one |
| 855 | * full frame/field. |
| 856 | */ |
| 857 | if (flags & DRM_CALLED_FROM_VBLIRQ && |
| 858 | position == vbl_start - 1) { |
| 859 | position = (position + 1) % vtotal; |
| 860 | |
| 861 | /* Signal this correction as "applied". */ |
| 862 | ret |= 0x8; |
| 863 | } |
| 864 | } |
| 865 | } else { |
| 866 | /* Have access to pixelcount since start of frame. |
| 867 | * We can split this into vertical and horizontal |
| 868 | * scanout position. |
| 869 | */ |
| 870 | position = (__raw_i915_read32(dev_priv, PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT; |
| 871 | |
| 872 | /* convert to pixel counts */ |
| 873 | vbl_start *= htotal; |
| 874 | vbl_end *= htotal; |
| 875 | vtotal *= htotal; |
| 876 | } |
| 877 | |
| 878 | /* Get optional system timestamp after query. */ |
| 879 | if (etime) |
| 880 | *etime = ktime_get(); |
| 881 | |
| 882 | /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */ |
| 883 | |
| 884 | spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); |
| 885 | |
| 886 | in_vbl = position >= vbl_start && position < vbl_end; |
| 887 | |
| 888 | /* |
| 889 | * While in vblank, position will be negative |
| 890 | * counting up towards 0 at vbl_end. And outside |
| 891 | * vblank, position will be positive counting |
| 892 | * up since vbl_end. |
| 893 | */ |
| 894 | if (position >= vbl_start) |
| 895 | position -= vbl_end; |
| 896 | else |
| 897 | position += vtotal - vbl_end; |
| 898 | |
| 899 | if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { |
| 900 | *vpos = position; |
| 901 | *hpos = 0; |
| 902 | } else { |
| 903 | *vpos = position / htotal; |
| 904 | *hpos = position - (*vpos * htotal); |
| 905 | } |
| 906 | |
| 907 | /* In vblank? */ |
| 908 | if (in_vbl) |
| 909 | ret |= DRM_SCANOUTPOS_INVBL; |
| 910 | |
| 911 | return ret; |
| 912 | } |
| 913 | |
| 914 | static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe, |
| 915 | int *max_error, |
| 916 | struct timeval *vblank_time, |
| 917 | unsigned flags) |
| 918 | { |
| 919 | struct drm_crtc *crtc; |
| 920 | |
| 921 | if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) { |
| 922 | DRM_ERROR("Invalid crtc %d\n" , pipe); |
| 923 | return -EINVAL; |
| 924 | } |
| 925 | |
| 926 | /* Get drm_crtc to timestamp: */ |
| 927 | crtc = intel_get_crtc_for_pipe(dev, pipe); |
| 928 | if (crtc == NULL) { |
| 929 | DRM_ERROR("Invalid crtc %d\n" , pipe); |
| 930 | return -EINVAL; |
| 931 | } |
| 932 | |
| 933 | if (!crtc->enabled) { |
| 934 | DRM_DEBUG_KMS("crtc %d is disabled\n" , pipe); |
| 935 | return -EBUSY; |
| 936 | } |
| 937 | |
| 938 | /* Helper routine in DRM core does all the work: */ |
| 939 | return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error, |
| 940 | vblank_time, flags, |
| 941 | crtc, |
| 942 | &to_intel_crtc(crtc)->config.adjusted_mode); |
| 943 | } |
| 944 | |
| 945 | static bool intel_hpd_irq_event(struct drm_device *dev, |
| 946 | struct drm_connector *connector) |
| 947 | { |
| 948 | enum drm_connector_status old_status; |
| 949 | |
| 950 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
| 951 | old_status = connector->status; |
| 952 | |
| 953 | connector->status = connector->funcs->detect(connector, false); |
| 954 | if (old_status == connector->status) |
| 955 | return false; |
| 956 | |
| 957 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n" , |
| 958 | connector->base.id, |
| 959 | drm_get_connector_name(connector), |
| 960 | drm_get_connector_status_name(old_status), |
| 961 | drm_get_connector_status_name(connector->status)); |
| 962 | |
| 963 | return true; |
| 964 | } |
| 965 | |
| 966 | /* |
| 967 | * Handle hotplug events outside the interrupt handler proper. |
| 968 | */ |
| 969 | #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000) |
| 970 | |
| 971 | static void i915_hotplug_work_func(struct work_struct *work) |
| 972 | { |
| 973 | struct drm_i915_private *dev_priv = |
| 974 | container_of(work, struct drm_i915_private, hotplug_work); |
| 975 | struct drm_device *dev = dev_priv->dev; |
| 976 | struct drm_mode_config *mode_config = &dev->mode_config; |
| 977 | struct intel_connector *intel_connector; |
| 978 | struct intel_encoder *intel_encoder; |
| 979 | struct drm_connector *connector; |
| 980 | unsigned long irqflags; |
| 981 | bool hpd_disabled = false; |
| 982 | bool changed = false; |
| 983 | u32 hpd_event_bits; |
| 984 | |
| 985 | /* HPD irq before everything is fully set up. */ |
| 986 | if (!dev_priv->enable_hotplug_processing) |
| 987 | return; |
| 988 | |
| 989 | mutex_lock(&mode_config->mutex); |
| 990 | DRM_DEBUG_KMS("running encoder hotplug functions\n" ); |
| 991 | |
| 992 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 993 | |
| 994 | hpd_event_bits = dev_priv->hpd_event_bits; |
| 995 | dev_priv->hpd_event_bits = 0; |
| 996 | list_for_each_entry(connector, &mode_config->connector_list, head) { |
| 997 | intel_connector = to_intel_connector(connector); |
| 998 | intel_encoder = intel_connector->encoder; |
| 999 | if (intel_encoder->hpd_pin > HPD_NONE && |
| 1000 | dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED && |
| 1001 | connector->polled == DRM_CONNECTOR_POLL_HPD) { |
| 1002 | DRM_INFO("HPD interrupt storm detected on connector %s: " |
| 1003 | "switching from hotplug detection to polling\n" , |
| 1004 | drm_get_connector_name(connector)); |
| 1005 | dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED; |
| 1006 | connector->polled = DRM_CONNECTOR_POLL_CONNECT |
| 1007 | | DRM_CONNECTOR_POLL_DISCONNECT; |
| 1008 | hpd_disabled = true; |
| 1009 | } |
| 1010 | if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) { |
| 1011 | DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n" , |
| 1012 | drm_get_connector_name(connector), intel_encoder->hpd_pin); |
| 1013 | } |
| 1014 | } |
| 1015 | /* if there were no outputs to poll, poll was disabled, |
| 1016 | * therefore make sure it's enabled when disabling HPD on |
| 1017 | * some connectors */ |
| 1018 | if (hpd_disabled) { |
| 1019 | drm_kms_helper_poll_enable(dev); |
| 1020 | mod_timer(&dev_priv->hotplug_reenable_timer, |
| 1021 | jiffies + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY)); |
| 1022 | } |
| 1023 | |
| 1024 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 1025 | |
| 1026 | list_for_each_entry(connector, &mode_config->connector_list, head) { |
| 1027 | intel_connector = to_intel_connector(connector); |
| 1028 | intel_encoder = intel_connector->encoder; |
| 1029 | if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) { |
| 1030 | if (intel_encoder->hot_plug) |
| 1031 | intel_encoder->hot_plug(intel_encoder); |
| 1032 | if (intel_hpd_irq_event(dev, connector)) |
| 1033 | changed = true; |
| 1034 | } |
| 1035 | } |
| 1036 | mutex_unlock(&mode_config->mutex); |
| 1037 | |
| 1038 | if (changed) |
| 1039 | drm_kms_helper_hotplug_event(dev); |
| 1040 | } |
| 1041 | |
| 1042 | static void intel_hpd_irq_uninstall(struct drm_i915_private *dev_priv) |
| 1043 | { |
| 1044 | del_timer_sync(&dev_priv->hotplug_reenable_timer); |
| 1045 | } |
| 1046 | |
| 1047 | static void ironlake_rps_change_irq_handler(struct drm_device *dev) |
| 1048 | { |
| 1049 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1050 | u32 busy_up, busy_down, max_avg, min_avg; |
| 1051 | u8 new_delay; |
| 1052 | |
| 1053 | spin_lock(&mchdev_lock); |
| 1054 | |
| 1055 | I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS)); |
| 1056 | |
| 1057 | new_delay = dev_priv->ips.cur_delay; |
| 1058 | |
| 1059 | I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG); |
| 1060 | busy_up = I915_READ(RCPREVBSYTUPAVG); |
| 1061 | busy_down = I915_READ(RCPREVBSYTDNAVG); |
| 1062 | max_avg = I915_READ(RCBMAXAVG); |
| 1063 | min_avg = I915_READ(RCBMINAVG); |
| 1064 | |
| 1065 | /* Handle RCS change request from hw */ |
| 1066 | if (busy_up > max_avg) { |
| 1067 | if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay) |
| 1068 | new_delay = dev_priv->ips.cur_delay - 1; |
| 1069 | if (new_delay < dev_priv->ips.max_delay) |
| 1070 | new_delay = dev_priv->ips.max_delay; |
| 1071 | } else if (busy_down < min_avg) { |
| 1072 | if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay) |
| 1073 | new_delay = dev_priv->ips.cur_delay + 1; |
| 1074 | if (new_delay > dev_priv->ips.min_delay) |
| 1075 | new_delay = dev_priv->ips.min_delay; |
| 1076 | } |
| 1077 | |
| 1078 | if (ironlake_set_drps(dev, new_delay)) |
| 1079 | dev_priv->ips.cur_delay = new_delay; |
| 1080 | |
| 1081 | spin_unlock(&mchdev_lock); |
| 1082 | |
| 1083 | return; |
| 1084 | } |
| 1085 | |
| 1086 | static void notify_ring(struct drm_device *dev, |
| 1087 | struct intel_ring_buffer *ring) |
| 1088 | { |
| 1089 | #ifdef __NetBSD__ |
| 1090 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1091 | #endif |
| 1092 | |
| 1093 | if (ring->obj == NULL) |
| 1094 | return; |
| 1095 | |
| 1096 | trace_i915_gem_request_complete(ring); |
| 1097 | |
| 1098 | #ifdef __NetBSD__ |
| 1099 | { |
| 1100 | unsigned long flags; |
| 1101 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1102 | /* |
| 1103 | * XXX Set a flag under the lock or push the lock out to callers. |
| 1104 | */ |
| 1105 | DRM_SPIN_WAKEUP_ALL(&ring->irq_queue, &dev_priv->irq_lock); |
| 1106 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1107 | } |
| 1108 | #else |
| 1109 | wake_up_all(&ring->irq_queue); |
| 1110 | #endif |
| 1111 | i915_queue_hangcheck(dev); |
| 1112 | } |
| 1113 | |
| 1114 | static void gen6_pm_rps_work(struct work_struct *work) |
| 1115 | { |
| 1116 | struct drm_i915_private *dev_priv = |
| 1117 | container_of(work, struct drm_i915_private, rps.work); |
| 1118 | u32 pm_iir; |
| 1119 | int new_delay, adj; |
| 1120 | |
| 1121 | spin_lock_irq(&dev_priv->irq_lock); |
| 1122 | pm_iir = dev_priv->rps.pm_iir; |
| 1123 | dev_priv->rps.pm_iir = 0; |
| 1124 | /* Make sure not to corrupt PMIMR state used by ringbuffer code */ |
| 1125 | snb_enable_pm_irq(dev_priv, dev_priv->pm_rps_events); |
| 1126 | spin_unlock_irq(&dev_priv->irq_lock); |
| 1127 | |
| 1128 | /* Make sure we didn't queue anything we're not going to process. */ |
| 1129 | WARN_ON(pm_iir & ~dev_priv->pm_rps_events); |
| 1130 | |
| 1131 | if ((pm_iir & dev_priv->pm_rps_events) == 0) |
| 1132 | return; |
| 1133 | |
| 1134 | mutex_lock(&dev_priv->rps.hw_lock); |
| 1135 | |
| 1136 | adj = dev_priv->rps.last_adj; |
| 1137 | if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) { |
| 1138 | if (adj > 0) |
| 1139 | adj *= 2; |
| 1140 | else |
| 1141 | adj = 1; |
| 1142 | new_delay = dev_priv->rps.cur_freq + adj; |
| 1143 | |
| 1144 | /* |
| 1145 | * For better performance, jump directly |
| 1146 | * to RPe if we're below it. |
| 1147 | */ |
| 1148 | if (new_delay < dev_priv->rps.efficient_freq) |
| 1149 | new_delay = dev_priv->rps.efficient_freq; |
| 1150 | } else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) { |
| 1151 | if (dev_priv->rps.cur_freq > dev_priv->rps.efficient_freq) |
| 1152 | new_delay = dev_priv->rps.efficient_freq; |
| 1153 | else |
| 1154 | new_delay = dev_priv->rps.min_freq_softlimit; |
| 1155 | adj = 0; |
| 1156 | } else if (pm_iir & GEN6_PM_RP_DOWN_THRESHOLD) { |
| 1157 | if (adj < 0) |
| 1158 | adj *= 2; |
| 1159 | else |
| 1160 | adj = -1; |
| 1161 | new_delay = dev_priv->rps.cur_freq + adj; |
| 1162 | } else { /* unknown event */ |
| 1163 | new_delay = dev_priv->rps.cur_freq; |
| 1164 | } |
| 1165 | |
| 1166 | /* sysfs frequency interfaces may have snuck in while servicing the |
| 1167 | * interrupt |
| 1168 | */ |
| 1169 | new_delay = clamp_t(int, new_delay, |
| 1170 | dev_priv->rps.min_freq_softlimit, |
| 1171 | dev_priv->rps.max_freq_softlimit); |
| 1172 | |
| 1173 | dev_priv->rps.last_adj = new_delay - dev_priv->rps.cur_freq; |
| 1174 | |
| 1175 | if (IS_VALLEYVIEW(dev_priv->dev)) |
| 1176 | valleyview_set_rps(dev_priv->dev, new_delay); |
| 1177 | else |
| 1178 | gen6_set_rps(dev_priv->dev, new_delay); |
| 1179 | |
| 1180 | mutex_unlock(&dev_priv->rps.hw_lock); |
| 1181 | } |
| 1182 | |
| 1183 | |
| 1184 | /** |
| 1185 | * ivybridge_parity_work - Workqueue called when a parity error interrupt |
| 1186 | * occurred. |
| 1187 | * @work: workqueue struct |
| 1188 | * |
| 1189 | * Doesn't actually do anything except notify userspace. As a consequence of |
| 1190 | * this event, userspace should try to remap the bad rows since statistically |
| 1191 | * it is likely the same row is more likely to go bad again. |
| 1192 | */ |
| 1193 | static void ivybridge_parity_work(struct work_struct *work) |
| 1194 | { |
| 1195 | struct drm_i915_private *dev_priv = |
| 1196 | container_of(work, struct drm_i915_private, l3_parity.error_work); |
| 1197 | u32 error_status, row, bank, subbank; |
| 1198 | #ifndef __NetBSD__ /* XXX kobject uevent...? */ |
| 1199 | char *parity_event[6]; |
| 1200 | #endif |
| 1201 | uint32_t misccpctl; |
| 1202 | unsigned long flags; |
| 1203 | uint8_t slice = 0; |
| 1204 | |
| 1205 | /* We must turn off DOP level clock gating to access the L3 registers. |
| 1206 | * In order to prevent a get/put style interface, acquire struct mutex |
| 1207 | * any time we access those registers. |
| 1208 | */ |
| 1209 | mutex_lock(&dev_priv->dev->struct_mutex); |
| 1210 | |
| 1211 | /* If we've screwed up tracking, just let the interrupt fire again */ |
| 1212 | if (WARN_ON(!dev_priv->l3_parity.which_slice)) |
| 1213 | goto out; |
| 1214 | |
| 1215 | misccpctl = I915_READ(GEN7_MISCCPCTL); |
| 1216 | I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE); |
| 1217 | POSTING_READ(GEN7_MISCCPCTL); |
| 1218 | |
| 1219 | while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) { |
| 1220 | u32 reg; |
| 1221 | |
| 1222 | slice--; |
| 1223 | if (WARN_ON_ONCE(slice >= NUM_L3_SLICES(dev_priv->dev))) |
| 1224 | break; |
| 1225 | |
| 1226 | dev_priv->l3_parity.which_slice &= ~(1<<slice); |
| 1227 | |
| 1228 | reg = GEN7_L3CDERRST1 + (slice * 0x200); |
| 1229 | |
| 1230 | error_status = I915_READ(reg); |
| 1231 | row = GEN7_PARITY_ERROR_ROW(error_status); |
| 1232 | bank = GEN7_PARITY_ERROR_BANK(error_status); |
| 1233 | subbank = GEN7_PARITY_ERROR_SUBBANK(error_status); |
| 1234 | |
| 1235 | I915_WRITE(reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE); |
| 1236 | POSTING_READ(reg); |
| 1237 | |
| 1238 | #ifndef __NetBSD__ /* XXX kobject uevent...? */ |
| 1239 | parity_event[0] = I915_L3_PARITY_UEVENT "=1" ; |
| 1240 | parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d" , row); |
| 1241 | parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d" , bank); |
| 1242 | parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d" , subbank); |
| 1243 | parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d" , slice); |
| 1244 | parity_event[5] = NULL; |
| 1245 | |
| 1246 | kobject_uevent_env(&dev_priv->dev->primary->kdev->kobj, |
| 1247 | KOBJ_CHANGE, parity_event); |
| 1248 | #endif |
| 1249 | |
| 1250 | DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n" , |
| 1251 | slice, row, bank, subbank); |
| 1252 | |
| 1253 | #ifndef __NetBSD__ /* XXX kobject uevent...? */ |
| 1254 | kfree(parity_event[4]); |
| 1255 | kfree(parity_event[3]); |
| 1256 | kfree(parity_event[2]); |
| 1257 | kfree(parity_event[1]); |
| 1258 | #endif |
| 1259 | } |
| 1260 | |
| 1261 | I915_WRITE(GEN7_MISCCPCTL, misccpctl); |
| 1262 | |
| 1263 | out: |
| 1264 | WARN_ON(dev_priv->l3_parity.which_slice); |
| 1265 | spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| 1266 | ilk_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv->dev)); |
| 1267 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| 1268 | |
| 1269 | mutex_unlock(&dev_priv->dev->struct_mutex); |
| 1270 | } |
| 1271 | |
| 1272 | static void ivybridge_parity_error_irq_handler(struct drm_device *dev, u32 iir) |
| 1273 | { |
| 1274 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1275 | |
| 1276 | if (!HAS_L3_DPF(dev)) |
| 1277 | return; |
| 1278 | |
| 1279 | spin_lock(&dev_priv->irq_lock); |
| 1280 | ilk_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev)); |
| 1281 | spin_unlock(&dev_priv->irq_lock); |
| 1282 | |
| 1283 | iir &= GT_PARITY_ERROR(dev); |
| 1284 | if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1) |
| 1285 | dev_priv->l3_parity.which_slice |= 1 << 1; |
| 1286 | |
| 1287 | if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT) |
| 1288 | dev_priv->l3_parity.which_slice |= 1 << 0; |
| 1289 | |
| 1290 | queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work); |
| 1291 | } |
| 1292 | |
| 1293 | static void ilk_gt_irq_handler(struct drm_device *dev, |
| 1294 | struct drm_i915_private *dev_priv, |
| 1295 | u32 gt_iir) |
| 1296 | { |
| 1297 | if (gt_iir & |
| 1298 | (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT)) |
| 1299 | notify_ring(dev, &dev_priv->ring[RCS]); |
| 1300 | if (gt_iir & ILK_BSD_USER_INTERRUPT) |
| 1301 | notify_ring(dev, &dev_priv->ring[VCS]); |
| 1302 | } |
| 1303 | |
| 1304 | static void snb_gt_irq_handler(struct drm_device *dev, |
| 1305 | struct drm_i915_private *dev_priv, |
| 1306 | u32 gt_iir) |
| 1307 | { |
| 1308 | |
| 1309 | if (gt_iir & |
| 1310 | (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT)) |
| 1311 | notify_ring(dev, &dev_priv->ring[RCS]); |
| 1312 | if (gt_iir & GT_BSD_USER_INTERRUPT) |
| 1313 | notify_ring(dev, &dev_priv->ring[VCS]); |
| 1314 | if (gt_iir & GT_BLT_USER_INTERRUPT) |
| 1315 | notify_ring(dev, &dev_priv->ring[BCS]); |
| 1316 | |
| 1317 | if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT | |
| 1318 | GT_BSD_CS_ERROR_INTERRUPT | |
| 1319 | GT_RENDER_CS_MASTER_ERROR_INTERRUPT)) { |
| 1320 | spin_lock(&dev_priv->irq_lock); |
| 1321 | i915_handle_error(dev, false, "GT error interrupt 0x%08x" , |
| 1322 | gt_iir); |
| 1323 | spin_unlock(&dev_priv->irq_lock); |
| 1324 | } |
| 1325 | |
| 1326 | if (gt_iir & GT_PARITY_ERROR(dev)) |
| 1327 | ivybridge_parity_error_irq_handler(dev, gt_iir); |
| 1328 | } |
| 1329 | |
| 1330 | static irqreturn_t gen8_gt_irq_handler(struct drm_device *dev, |
| 1331 | struct drm_i915_private *dev_priv, |
| 1332 | u32 master_ctl) |
| 1333 | { |
| 1334 | u32 rcs, bcs, vcs; |
| 1335 | uint32_t tmp = 0; |
| 1336 | irqreturn_t ret = IRQ_NONE; |
| 1337 | |
| 1338 | if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) { |
| 1339 | tmp = I915_READ(GEN8_GT_IIR(0)); |
| 1340 | if (tmp) { |
| 1341 | ret = IRQ_HANDLED; |
| 1342 | rcs = tmp >> GEN8_RCS_IRQ_SHIFT; |
| 1343 | bcs = tmp >> GEN8_BCS_IRQ_SHIFT; |
| 1344 | if (rcs & GT_RENDER_USER_INTERRUPT) |
| 1345 | notify_ring(dev, &dev_priv->ring[RCS]); |
| 1346 | if (bcs & GT_RENDER_USER_INTERRUPT) |
| 1347 | notify_ring(dev, &dev_priv->ring[BCS]); |
| 1348 | I915_WRITE(GEN8_GT_IIR(0), tmp); |
| 1349 | } else |
| 1350 | DRM_ERROR("The master control interrupt lied (GT0)!\n" ); |
| 1351 | } |
| 1352 | |
| 1353 | if (master_ctl & GEN8_GT_VCS1_IRQ) { |
| 1354 | tmp = I915_READ(GEN8_GT_IIR(1)); |
| 1355 | if (tmp) { |
| 1356 | ret = IRQ_HANDLED; |
| 1357 | vcs = tmp >> GEN8_VCS1_IRQ_SHIFT; |
| 1358 | if (vcs & GT_RENDER_USER_INTERRUPT) |
| 1359 | notify_ring(dev, &dev_priv->ring[VCS]); |
| 1360 | I915_WRITE(GEN8_GT_IIR(1), tmp); |
| 1361 | } else |
| 1362 | DRM_ERROR("The master control interrupt lied (GT1)!\n" ); |
| 1363 | } |
| 1364 | |
| 1365 | if (master_ctl & GEN8_GT_VECS_IRQ) { |
| 1366 | tmp = I915_READ(GEN8_GT_IIR(3)); |
| 1367 | if (tmp) { |
| 1368 | ret = IRQ_HANDLED; |
| 1369 | vcs = tmp >> GEN8_VECS_IRQ_SHIFT; |
| 1370 | if (vcs & GT_RENDER_USER_INTERRUPT) |
| 1371 | notify_ring(dev, &dev_priv->ring[VECS]); |
| 1372 | I915_WRITE(GEN8_GT_IIR(3), tmp); |
| 1373 | } else |
| 1374 | DRM_ERROR("The master control interrupt lied (GT3)!\n" ); |
| 1375 | } |
| 1376 | |
| 1377 | return ret; |
| 1378 | } |
| 1379 | |
| 1380 | #define HPD_STORM_DETECT_PERIOD 1000 |
| 1381 | #define HPD_STORM_THRESHOLD 5 |
| 1382 | |
| 1383 | static inline void intel_hpd_irq_handler(struct drm_device *dev, |
| 1384 | u32 hotplug_trigger, |
| 1385 | const u32 *hpd) |
| 1386 | { |
| 1387 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1388 | int i; |
| 1389 | bool storm_detected = false; |
| 1390 | |
| 1391 | if (!hotplug_trigger) |
| 1392 | return; |
| 1393 | |
| 1394 | DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n" , |
| 1395 | hotplug_trigger); |
| 1396 | |
| 1397 | spin_lock(&dev_priv->irq_lock); |
| 1398 | for (i = 1; i < HPD_NUM_PINS; i++) { |
| 1399 | |
| 1400 | if (hpd[i] & hotplug_trigger && |
| 1401 | dev_priv->hpd_stats[i].hpd_mark == HPD_DISABLED) { |
| 1402 | /* |
| 1403 | * On GMCH platforms the interrupt mask bits only |
| 1404 | * prevent irq generation, not the setting of the |
| 1405 | * hotplug bits itself. So only WARN about unexpected |
| 1406 | * interrupts on saner platforms. |
| 1407 | */ |
| 1408 | WARN_ONCE(INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev), |
| 1409 | "Received HPD interrupt (0x%08x) on pin %d (0x%08x) although disabled\n" , |
| 1410 | hotplug_trigger, i, hpd[i]); |
| 1411 | |
| 1412 | continue; |
| 1413 | } |
| 1414 | |
| 1415 | if (!(hpd[i] & hotplug_trigger) || |
| 1416 | dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED) |
| 1417 | continue; |
| 1418 | |
| 1419 | dev_priv->hpd_event_bits |= (1 << i); |
| 1420 | if (!time_in_range(jiffies, dev_priv->hpd_stats[i].hpd_last_jiffies, |
| 1421 | dev_priv->hpd_stats[i].hpd_last_jiffies |
| 1422 | + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) { |
| 1423 | dev_priv->hpd_stats[i].hpd_last_jiffies = jiffies; |
| 1424 | dev_priv->hpd_stats[i].hpd_cnt = 0; |
| 1425 | DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: 0\n" , i); |
| 1426 | } else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) { |
| 1427 | dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED; |
| 1428 | dev_priv->hpd_event_bits &= ~(1 << i); |
| 1429 | DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n" , i); |
| 1430 | storm_detected = true; |
| 1431 | } else { |
| 1432 | dev_priv->hpd_stats[i].hpd_cnt++; |
| 1433 | DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n" , i, |
| 1434 | dev_priv->hpd_stats[i].hpd_cnt); |
| 1435 | } |
| 1436 | } |
| 1437 | |
| 1438 | if (storm_detected) |
| 1439 | dev_priv->display.hpd_irq_setup(dev); |
| 1440 | spin_unlock(&dev_priv->irq_lock); |
| 1441 | |
| 1442 | /* |
| 1443 | * Our hotplug handler can grab modeset locks (by calling down into the |
| 1444 | * fb helpers). Hence it must not be run on our own dev-priv->wq work |
| 1445 | * queue for otherwise the flush_work in the pageflip code will |
| 1446 | * deadlock. |
| 1447 | */ |
| 1448 | schedule_work(&dev_priv->hotplug_work); |
| 1449 | } |
| 1450 | |
| 1451 | static void gmbus_irq_handler(struct drm_device *dev) |
| 1452 | { |
| 1453 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1454 | |
| 1455 | #ifdef __NetBSD__ |
| 1456 | spin_lock(&dev_priv->gmbus_wait_lock); |
| 1457 | /* XXX Set a flag here... */ |
| 1458 | DRM_SPIN_WAKEUP_ALL(&dev_priv->gmbus_wait_queue, |
| 1459 | &dev_priv->gmbus_wait_lock); |
| 1460 | spin_unlock(&dev_priv->gmbus_wait_lock); |
| 1461 | #else |
| 1462 | wake_up_all(&dev_priv->gmbus_wait_queue); |
| 1463 | #endif |
| 1464 | } |
| 1465 | |
| 1466 | static void dp_aux_irq_handler(struct drm_device *dev) |
| 1467 | { |
| 1468 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1469 | |
| 1470 | #ifdef __NetBSD__ |
| 1471 | spin_lock(&dev_priv->gmbus_wait_lock); |
| 1472 | /* XXX Set a flag here... */ |
| 1473 | DRM_SPIN_WAKEUP_ALL(&dev_priv->gmbus_wait_queue, |
| 1474 | &dev_priv->gmbus_wait_lock); |
| 1475 | spin_unlock(&dev_priv->gmbus_wait_lock); |
| 1476 | #else |
| 1477 | wake_up_all(&dev_priv->gmbus_wait_queue); |
| 1478 | #endif |
| 1479 | } |
| 1480 | |
| 1481 | #if defined(CONFIG_DEBUG_FS) |
| 1482 | static void display_pipe_crc_irq_handler(struct drm_device *dev, enum i915_pipe pipe, |
| 1483 | uint32_t crc0, uint32_t crc1, |
| 1484 | uint32_t crc2, uint32_t crc3, |
| 1485 | uint32_t crc4) |
| 1486 | { |
| 1487 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1488 | struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe]; |
| 1489 | struct intel_pipe_crc_entry *entry; |
| 1490 | int head, tail; |
| 1491 | |
| 1492 | spin_lock(&pipe_crc->lock); |
| 1493 | |
| 1494 | if (!pipe_crc->entries) { |
| 1495 | spin_unlock(&pipe_crc->lock); |
| 1496 | DRM_ERROR("spurious interrupt\n" ); |
| 1497 | return; |
| 1498 | } |
| 1499 | |
| 1500 | head = pipe_crc->head; |
| 1501 | tail = pipe_crc->tail; |
| 1502 | |
| 1503 | if (CIRC_SPACE(head, tail, INTEL_PIPE_CRC_ENTRIES_NR) < 1) { |
| 1504 | spin_unlock(&pipe_crc->lock); |
| 1505 | DRM_ERROR("CRC buffer overflowing\n" ); |
| 1506 | return; |
| 1507 | } |
| 1508 | |
| 1509 | entry = &pipe_crc->entries[head]; |
| 1510 | |
| 1511 | entry->frame = dev->driver->get_vblank_counter(dev, pipe); |
| 1512 | entry->crc[0] = crc0; |
| 1513 | entry->crc[1] = crc1; |
| 1514 | entry->crc[2] = crc2; |
| 1515 | entry->crc[3] = crc3; |
| 1516 | entry->crc[4] = crc4; |
| 1517 | |
| 1518 | head = (head + 1) & (INTEL_PIPE_CRC_ENTRIES_NR - 1); |
| 1519 | pipe_crc->head = head; |
| 1520 | |
| 1521 | spin_unlock(&pipe_crc->lock); |
| 1522 | |
| 1523 | wake_up_interruptible(&pipe_crc->wq); |
| 1524 | } |
| 1525 | #else |
| 1526 | static inline void |
| 1527 | display_pipe_crc_irq_handler(struct drm_device *dev, enum i915_pipe pipe, |
| 1528 | uint32_t crc0, uint32_t crc1, |
| 1529 | uint32_t crc2, uint32_t crc3, |
| 1530 | uint32_t crc4) {} |
| 1531 | #endif |
| 1532 | |
| 1533 | |
| 1534 | static void hsw_pipe_crc_irq_handler(struct drm_device *dev, enum i915_pipe pipe) |
| 1535 | { |
| 1536 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1537 | |
| 1538 | display_pipe_crc_irq_handler(dev, pipe, |
| 1539 | I915_READ(PIPE_CRC_RES_1_IVB(pipe)), |
| 1540 | 0, 0, 0, 0); |
| 1541 | } |
| 1542 | |
| 1543 | static void ivb_pipe_crc_irq_handler(struct drm_device *dev, enum i915_pipe pipe) |
| 1544 | { |
| 1545 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1546 | |
| 1547 | display_pipe_crc_irq_handler(dev, pipe, |
| 1548 | I915_READ(PIPE_CRC_RES_1_IVB(pipe)), |
| 1549 | I915_READ(PIPE_CRC_RES_2_IVB(pipe)), |
| 1550 | I915_READ(PIPE_CRC_RES_3_IVB(pipe)), |
| 1551 | I915_READ(PIPE_CRC_RES_4_IVB(pipe)), |
| 1552 | I915_READ(PIPE_CRC_RES_5_IVB(pipe))); |
| 1553 | } |
| 1554 | |
| 1555 | static void i9xx_pipe_crc_irq_handler(struct drm_device *dev, enum i915_pipe pipe) |
| 1556 | { |
| 1557 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1558 | uint32_t res1, res2; |
| 1559 | |
| 1560 | if (INTEL_INFO(dev)->gen >= 3) |
| 1561 | res1 = I915_READ(PIPE_CRC_RES_RES1_I915(pipe)); |
| 1562 | else |
| 1563 | res1 = 0; |
| 1564 | |
| 1565 | if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev)) |
| 1566 | res2 = I915_READ(PIPE_CRC_RES_RES2_G4X(pipe)); |
| 1567 | else |
| 1568 | res2 = 0; |
| 1569 | |
| 1570 | display_pipe_crc_irq_handler(dev, pipe, |
| 1571 | I915_READ(PIPE_CRC_RES_RED(pipe)), |
| 1572 | I915_READ(PIPE_CRC_RES_GREEN(pipe)), |
| 1573 | I915_READ(PIPE_CRC_RES_BLUE(pipe)), |
| 1574 | res1, res2); |
| 1575 | } |
| 1576 | |
| 1577 | /* The RPS events need forcewake, so we add them to a work queue and mask their |
| 1578 | * IMR bits until the work is done. Other interrupts can be processed without |
| 1579 | * the work queue. */ |
| 1580 | static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir) |
| 1581 | { |
| 1582 | if (pm_iir & dev_priv->pm_rps_events) { |
| 1583 | spin_lock(&dev_priv->irq_lock); |
| 1584 | dev_priv->rps.pm_iir |= pm_iir & dev_priv->pm_rps_events; |
| 1585 | snb_disable_pm_irq(dev_priv, pm_iir & dev_priv->pm_rps_events); |
| 1586 | spin_unlock(&dev_priv->irq_lock); |
| 1587 | |
| 1588 | queue_work(dev_priv->wq, &dev_priv->rps.work); |
| 1589 | } |
| 1590 | |
| 1591 | if (HAS_VEBOX(dev_priv->dev)) { |
| 1592 | if (pm_iir & PM_VEBOX_USER_INTERRUPT) |
| 1593 | notify_ring(dev_priv->dev, &dev_priv->ring[VECS]); |
| 1594 | |
| 1595 | if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) { |
| 1596 | spin_lock(&dev_priv->irq_lock); |
| 1597 | i915_handle_error(dev_priv->dev, false, |
| 1598 | "VEBOX CS error interrupt 0x%08x" , |
| 1599 | pm_iir); |
| 1600 | spin_unlock(&dev_priv->irq_lock); |
| 1601 | } |
| 1602 | } |
| 1603 | } |
| 1604 | |
| 1605 | static void valleyview_pipestat_irq_handler(struct drm_device *dev, u32 iir) |
| 1606 | { |
| 1607 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1608 | u32 pipe_stats[I915_MAX_PIPES] = { }; |
| 1609 | int pipe; |
| 1610 | |
| 1611 | spin_lock(&dev_priv->irq_lock); |
| 1612 | for_each_pipe(pipe) { |
| 1613 | int reg; |
| 1614 | u32 mask, iir_bit = 0; |
| 1615 | |
| 1616 | /* |
| 1617 | * PIPESTAT bits get signalled even when the interrupt is |
| 1618 | * disabled with the mask bits, and some of the status bits do |
| 1619 | * not generate interrupts at all (like the underrun bit). Hence |
| 1620 | * we need to be careful that we only handle what we want to |
| 1621 | * handle. |
| 1622 | */ |
| 1623 | mask = 0; |
| 1624 | if (__cpu_fifo_underrun_reporting_enabled(dev, pipe)) |
| 1625 | mask |= PIPE_FIFO_UNDERRUN_STATUS; |
| 1626 | |
| 1627 | switch (pipe) { |
| 1628 | case PIPE_A: |
| 1629 | iir_bit = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT; |
| 1630 | break; |
| 1631 | case PIPE_B: |
| 1632 | iir_bit = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT; |
| 1633 | break; |
| 1634 | } |
| 1635 | if (iir & iir_bit) |
| 1636 | mask |= dev_priv->pipestat_irq_mask[pipe]; |
| 1637 | |
| 1638 | if (!mask) |
| 1639 | continue; |
| 1640 | |
| 1641 | reg = PIPESTAT(pipe); |
| 1642 | mask |= PIPESTAT_INT_ENABLE_MASK; |
| 1643 | pipe_stats[pipe] = I915_READ(reg) & mask; |
| 1644 | |
| 1645 | /* |
| 1646 | * Clear the PIPE*STAT regs before the IIR |
| 1647 | */ |
| 1648 | if (pipe_stats[pipe] & (PIPE_FIFO_UNDERRUN_STATUS | |
| 1649 | PIPESTAT_INT_STATUS_MASK)) |
| 1650 | I915_WRITE(reg, pipe_stats[pipe]); |
| 1651 | } |
| 1652 | spin_unlock(&dev_priv->irq_lock); |
| 1653 | |
| 1654 | for_each_pipe(pipe) { |
| 1655 | if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS) |
| 1656 | drm_handle_vblank(dev, pipe); |
| 1657 | |
| 1658 | if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV) { |
| 1659 | intel_prepare_page_flip(dev, pipe); |
| 1660 | intel_finish_page_flip(dev, pipe); |
| 1661 | } |
| 1662 | |
| 1663 | if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) |
| 1664 | i9xx_pipe_crc_irq_handler(dev, pipe); |
| 1665 | |
| 1666 | if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS && |
| 1667 | intel_set_cpu_fifo_underrun_reporting(dev, pipe, false)) |
| 1668 | DRM_ERROR("pipe %c underrun\n" , pipe_name(pipe)); |
| 1669 | } |
| 1670 | |
| 1671 | if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS) |
| 1672 | gmbus_irq_handler(dev); |
| 1673 | } |
| 1674 | |
| 1675 | static irqreturn_t valleyview_irq_handler(DRM_IRQ_ARGS) |
| 1676 | { |
| 1677 | struct drm_device *dev = (struct drm_device *) arg; |
| 1678 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1679 | u32 iir, gt_iir, pm_iir; |
| 1680 | irqreturn_t ret = IRQ_NONE; |
| 1681 | |
| 1682 | while (true) { |
| 1683 | iir = I915_READ(VLV_IIR); |
| 1684 | gt_iir = I915_READ(GTIIR); |
| 1685 | pm_iir = I915_READ(GEN6_PMIIR); |
| 1686 | |
| 1687 | if (gt_iir == 0 && pm_iir == 0 && iir == 0) |
| 1688 | goto out; |
| 1689 | |
| 1690 | ret = IRQ_HANDLED; |
| 1691 | |
| 1692 | snb_gt_irq_handler(dev, dev_priv, gt_iir); |
| 1693 | |
| 1694 | valleyview_pipestat_irq_handler(dev, iir); |
| 1695 | |
| 1696 | /* Consume port. Then clear IIR or we'll miss events */ |
| 1697 | if (iir & I915_DISPLAY_PORT_INTERRUPT) { |
| 1698 | u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); |
| 1699 | u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915; |
| 1700 | |
| 1701 | intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915); |
| 1702 | |
| 1703 | if (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X) |
| 1704 | dp_aux_irq_handler(dev); |
| 1705 | |
| 1706 | I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); |
| 1707 | I915_READ(PORT_HOTPLUG_STAT); |
| 1708 | } |
| 1709 | |
| 1710 | |
| 1711 | if (pm_iir) |
| 1712 | gen6_rps_irq_handler(dev_priv, pm_iir); |
| 1713 | |
| 1714 | I915_WRITE(GTIIR, gt_iir); |
| 1715 | I915_WRITE(GEN6_PMIIR, pm_iir); |
| 1716 | I915_WRITE(VLV_IIR, iir); |
| 1717 | } |
| 1718 | |
| 1719 | out: |
| 1720 | return ret; |
| 1721 | } |
| 1722 | |
| 1723 | static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir) |
| 1724 | { |
| 1725 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1726 | int pipe; |
| 1727 | u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK; |
| 1728 | |
| 1729 | intel_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx); |
| 1730 | |
| 1731 | if (pch_iir & SDE_AUDIO_POWER_MASK) { |
| 1732 | int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >> |
| 1733 | SDE_AUDIO_POWER_SHIFT); |
| 1734 | DRM_DEBUG_DRIVER("PCH audio power change on port %d\n" , |
| 1735 | port_name(port)); |
| 1736 | } |
| 1737 | |
| 1738 | if (pch_iir & SDE_AUX_MASK) |
| 1739 | dp_aux_irq_handler(dev); |
| 1740 | |
| 1741 | if (pch_iir & SDE_GMBUS) |
| 1742 | gmbus_irq_handler(dev); |
| 1743 | |
| 1744 | if (pch_iir & SDE_AUDIO_HDCP_MASK) |
| 1745 | DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n" ); |
| 1746 | |
| 1747 | if (pch_iir & SDE_AUDIO_TRANS_MASK) |
| 1748 | DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n" ); |
| 1749 | |
| 1750 | if (pch_iir & SDE_POISON) |
| 1751 | DRM_ERROR("PCH poison interrupt\n" ); |
| 1752 | |
| 1753 | if (pch_iir & SDE_FDI_MASK) |
| 1754 | for_each_pipe(pipe) |
| 1755 | DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n" , |
| 1756 | pipe_name(pipe), |
| 1757 | I915_READ(FDI_RX_IIR(pipe))); |
| 1758 | |
| 1759 | if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE)) |
| 1760 | DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n" ); |
| 1761 | |
| 1762 | if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR)) |
| 1763 | DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n" ); |
| 1764 | |
| 1765 | if (pch_iir & SDE_TRANSA_FIFO_UNDER) |
| 1766 | if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A, |
| 1767 | false)) |
| 1768 | DRM_ERROR("PCH transcoder A FIFO underrun\n" ); |
| 1769 | |
| 1770 | if (pch_iir & SDE_TRANSB_FIFO_UNDER) |
| 1771 | if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B, |
| 1772 | false)) |
| 1773 | DRM_ERROR("PCH transcoder B FIFO underrun\n" ); |
| 1774 | } |
| 1775 | |
| 1776 | static void ivb_err_int_handler(struct drm_device *dev) |
| 1777 | { |
| 1778 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1779 | u32 err_int = I915_READ(GEN7_ERR_INT); |
| 1780 | enum i915_pipe pipe; |
| 1781 | |
| 1782 | if (err_int & ERR_INT_POISON) |
| 1783 | DRM_ERROR("Poison interrupt\n" ); |
| 1784 | |
| 1785 | for_each_pipe(pipe) { |
| 1786 | if (err_int & ERR_INT_FIFO_UNDERRUN(pipe)) { |
| 1787 | if (intel_set_cpu_fifo_underrun_reporting(dev, pipe, |
| 1788 | false)) |
| 1789 | DRM_ERROR("Pipe %c FIFO underrun\n" , |
| 1790 | pipe_name(pipe)); |
| 1791 | } |
| 1792 | |
| 1793 | if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) { |
| 1794 | if (IS_IVYBRIDGE(dev)) |
| 1795 | ivb_pipe_crc_irq_handler(dev, pipe); |
| 1796 | else |
| 1797 | hsw_pipe_crc_irq_handler(dev, pipe); |
| 1798 | } |
| 1799 | } |
| 1800 | |
| 1801 | I915_WRITE(GEN7_ERR_INT, err_int); |
| 1802 | } |
| 1803 | |
| 1804 | static void cpt_serr_int_handler(struct drm_device *dev) |
| 1805 | { |
| 1806 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1807 | u32 serr_int = I915_READ(SERR_INT); |
| 1808 | |
| 1809 | if (serr_int & SERR_INT_POISON) |
| 1810 | DRM_ERROR("PCH poison interrupt\n" ); |
| 1811 | |
| 1812 | if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN) |
| 1813 | if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A, |
| 1814 | false)) |
| 1815 | DRM_ERROR("PCH transcoder A FIFO underrun\n" ); |
| 1816 | |
| 1817 | if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN) |
| 1818 | if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B, |
| 1819 | false)) |
| 1820 | DRM_ERROR("PCH transcoder B FIFO underrun\n" ); |
| 1821 | |
| 1822 | if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN) |
| 1823 | if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C, |
| 1824 | false)) |
| 1825 | DRM_ERROR("PCH transcoder C FIFO underrun\n" ); |
| 1826 | |
| 1827 | I915_WRITE(SERR_INT, serr_int); |
| 1828 | } |
| 1829 | |
| 1830 | static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir) |
| 1831 | { |
| 1832 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1833 | int pipe; |
| 1834 | u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT; |
| 1835 | |
| 1836 | intel_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt); |
| 1837 | |
| 1838 | if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) { |
| 1839 | int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >> |
| 1840 | SDE_AUDIO_POWER_SHIFT_CPT); |
| 1841 | DRM_DEBUG_DRIVER("PCH audio power change on port %c\n" , |
| 1842 | port_name(port)); |
| 1843 | } |
| 1844 | |
| 1845 | if (pch_iir & SDE_AUX_MASK_CPT) |
| 1846 | dp_aux_irq_handler(dev); |
| 1847 | |
| 1848 | if (pch_iir & SDE_GMBUS_CPT) |
| 1849 | gmbus_irq_handler(dev); |
| 1850 | |
| 1851 | if (pch_iir & SDE_AUDIO_CP_REQ_CPT) |
| 1852 | DRM_DEBUG_DRIVER("Audio CP request interrupt\n" ); |
| 1853 | |
| 1854 | if (pch_iir & SDE_AUDIO_CP_CHG_CPT) |
| 1855 | DRM_DEBUG_DRIVER("Audio CP change interrupt\n" ); |
| 1856 | |
| 1857 | if (pch_iir & SDE_FDI_MASK_CPT) |
| 1858 | for_each_pipe(pipe) |
| 1859 | DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n" , |
| 1860 | pipe_name(pipe), |
| 1861 | I915_READ(FDI_RX_IIR(pipe))); |
| 1862 | |
| 1863 | if (pch_iir & SDE_ERROR_CPT) |
| 1864 | cpt_serr_int_handler(dev); |
| 1865 | } |
| 1866 | |
| 1867 | static void ilk_display_irq_handler(struct drm_device *dev, u32 de_iir) |
| 1868 | { |
| 1869 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1870 | enum i915_pipe pipe; |
| 1871 | |
| 1872 | if (de_iir & DE_AUX_CHANNEL_A) |
| 1873 | dp_aux_irq_handler(dev); |
| 1874 | |
| 1875 | if (de_iir & DE_GSE) |
| 1876 | intel_opregion_asle_intr(dev); |
| 1877 | |
| 1878 | if (de_iir & DE_POISON) |
| 1879 | DRM_ERROR("Poison interrupt\n" ); |
| 1880 | |
| 1881 | for_each_pipe(pipe) { |
| 1882 | if (de_iir & DE_PIPE_VBLANK(pipe)) |
| 1883 | drm_handle_vblank(dev, pipe); |
| 1884 | |
| 1885 | if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe)) |
| 1886 | if (intel_set_cpu_fifo_underrun_reporting(dev, pipe, false)) |
| 1887 | DRM_ERROR("Pipe %c FIFO underrun\n" , |
| 1888 | pipe_name(pipe)); |
| 1889 | |
| 1890 | if (de_iir & DE_PIPE_CRC_DONE(pipe)) |
| 1891 | i9xx_pipe_crc_irq_handler(dev, pipe); |
| 1892 | |
| 1893 | /* plane/pipes map 1:1 on ilk+ */ |
| 1894 | if (de_iir & DE_PLANE_FLIP_DONE(pipe)) { |
| 1895 | intel_prepare_page_flip(dev, pipe); |
| 1896 | intel_finish_page_flip_plane(dev, pipe); |
| 1897 | } |
| 1898 | } |
| 1899 | |
| 1900 | /* check event from PCH */ |
| 1901 | if (de_iir & DE_PCH_EVENT) { |
| 1902 | u32 pch_iir = I915_READ(SDEIIR); |
| 1903 | |
| 1904 | if (HAS_PCH_CPT(dev)) |
| 1905 | cpt_irq_handler(dev, pch_iir); |
| 1906 | else |
| 1907 | ibx_irq_handler(dev, pch_iir); |
| 1908 | |
| 1909 | /* should clear PCH hotplug event before clear CPU irq */ |
| 1910 | I915_WRITE(SDEIIR, pch_iir); |
| 1911 | } |
| 1912 | |
| 1913 | if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT) |
| 1914 | ironlake_rps_change_irq_handler(dev); |
| 1915 | } |
| 1916 | |
| 1917 | static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir) |
| 1918 | { |
| 1919 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1920 | enum i915_pipe pipe; |
| 1921 | |
| 1922 | if (de_iir & DE_ERR_INT_IVB) |
| 1923 | ivb_err_int_handler(dev); |
| 1924 | |
| 1925 | if (de_iir & DE_AUX_CHANNEL_A_IVB) |
| 1926 | dp_aux_irq_handler(dev); |
| 1927 | |
| 1928 | if (de_iir & DE_GSE_IVB) |
| 1929 | intel_opregion_asle_intr(dev); |
| 1930 | |
| 1931 | for_each_pipe(pipe) { |
| 1932 | if (de_iir & (DE_PIPE_VBLANK_IVB(pipe))) |
| 1933 | drm_handle_vblank(dev, pipe); |
| 1934 | |
| 1935 | /* plane/pipes map 1:1 on ilk+ */ |
| 1936 | if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe)) { |
| 1937 | intel_prepare_page_flip(dev, pipe); |
| 1938 | intel_finish_page_flip_plane(dev, pipe); |
| 1939 | } |
| 1940 | } |
| 1941 | |
| 1942 | /* check event from PCH */ |
| 1943 | if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) { |
| 1944 | u32 pch_iir = I915_READ(SDEIIR); |
| 1945 | |
| 1946 | cpt_irq_handler(dev, pch_iir); |
| 1947 | |
| 1948 | /* clear PCH hotplug event before clear CPU irq */ |
| 1949 | I915_WRITE(SDEIIR, pch_iir); |
| 1950 | } |
| 1951 | } |
| 1952 | |
| 1953 | static irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS) |
| 1954 | { |
| 1955 | struct drm_device *dev = (struct drm_device *) arg; |
| 1956 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 1957 | u32 de_iir, gt_iir, de_ier, sde_ier = 0; |
| 1958 | irqreturn_t ret = IRQ_NONE; |
| 1959 | |
| 1960 | /* We get interrupts on unclaimed registers, so check for this before we |
| 1961 | * do any I915_{READ,WRITE}. */ |
| 1962 | intel_uncore_check_errors(dev); |
| 1963 | |
| 1964 | /* disable master interrupt before clearing iir */ |
| 1965 | de_ier = I915_READ(DEIER); |
| 1966 | I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); |
| 1967 | POSTING_READ(DEIER); |
| 1968 | |
| 1969 | /* Disable south interrupts. We'll only write to SDEIIR once, so further |
| 1970 | * interrupts will will be stored on its back queue, and then we'll be |
| 1971 | * able to process them after we restore SDEIER (as soon as we restore |
| 1972 | * it, we'll get an interrupt if SDEIIR still has something to process |
| 1973 | * due to its back queue). */ |
| 1974 | if (!HAS_PCH_NOP(dev)) { |
| 1975 | sde_ier = I915_READ(SDEIER); |
| 1976 | I915_WRITE(SDEIER, 0); |
| 1977 | POSTING_READ(SDEIER); |
| 1978 | } |
| 1979 | |
| 1980 | gt_iir = I915_READ(GTIIR); |
| 1981 | if (gt_iir) { |
| 1982 | if (INTEL_INFO(dev)->gen >= 6) |
| 1983 | snb_gt_irq_handler(dev, dev_priv, gt_iir); |
| 1984 | else |
| 1985 | ilk_gt_irq_handler(dev, dev_priv, gt_iir); |
| 1986 | I915_WRITE(GTIIR, gt_iir); |
| 1987 | ret = IRQ_HANDLED; |
| 1988 | } |
| 1989 | |
| 1990 | de_iir = I915_READ(DEIIR); |
| 1991 | if (de_iir) { |
| 1992 | if (INTEL_INFO(dev)->gen >= 7) |
| 1993 | ivb_display_irq_handler(dev, de_iir); |
| 1994 | else |
| 1995 | ilk_display_irq_handler(dev, de_iir); |
| 1996 | I915_WRITE(DEIIR, de_iir); |
| 1997 | ret = IRQ_HANDLED; |
| 1998 | } |
| 1999 | |
| 2000 | if (INTEL_INFO(dev)->gen >= 6) { |
| 2001 | u32 pm_iir = I915_READ(GEN6_PMIIR); |
| 2002 | if (pm_iir) { |
| 2003 | gen6_rps_irq_handler(dev_priv, pm_iir); |
| 2004 | I915_WRITE(GEN6_PMIIR, pm_iir); |
| 2005 | ret = IRQ_HANDLED; |
| 2006 | } |
| 2007 | } |
| 2008 | |
| 2009 | I915_WRITE(DEIER, de_ier); |
| 2010 | POSTING_READ(DEIER); |
| 2011 | if (!HAS_PCH_NOP(dev)) { |
| 2012 | I915_WRITE(SDEIER, sde_ier); |
| 2013 | POSTING_READ(SDEIER); |
| 2014 | } |
| 2015 | |
| 2016 | return ret; |
| 2017 | } |
| 2018 | |
| 2019 | static irqreturn_t gen8_irq_handler(DRM_IRQ_ARGS) |
| 2020 | { |
| 2021 | struct drm_device *dev = arg; |
| 2022 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2023 | u32 master_ctl; |
| 2024 | irqreturn_t ret = IRQ_NONE; |
| 2025 | uint32_t tmp = 0; |
| 2026 | enum i915_pipe pipe; |
| 2027 | |
| 2028 | master_ctl = I915_READ(GEN8_MASTER_IRQ); |
| 2029 | master_ctl &= ~GEN8_MASTER_IRQ_CONTROL; |
| 2030 | if (!master_ctl) |
| 2031 | return IRQ_NONE; |
| 2032 | |
| 2033 | I915_WRITE(GEN8_MASTER_IRQ, 0); |
| 2034 | POSTING_READ(GEN8_MASTER_IRQ); |
| 2035 | |
| 2036 | ret = gen8_gt_irq_handler(dev, dev_priv, master_ctl); |
| 2037 | |
| 2038 | if (master_ctl & GEN8_DE_MISC_IRQ) { |
| 2039 | tmp = I915_READ(GEN8_DE_MISC_IIR); |
| 2040 | if (tmp & GEN8_DE_MISC_GSE) |
| 2041 | intel_opregion_asle_intr(dev); |
| 2042 | else if (tmp) |
| 2043 | DRM_ERROR("Unexpected DE Misc interrupt\n" ); |
| 2044 | else |
| 2045 | DRM_ERROR("The master control interrupt lied (DE MISC)!\n" ); |
| 2046 | |
| 2047 | if (tmp) { |
| 2048 | I915_WRITE(GEN8_DE_MISC_IIR, tmp); |
| 2049 | ret = IRQ_HANDLED; |
| 2050 | } |
| 2051 | } |
| 2052 | |
| 2053 | if (master_ctl & GEN8_DE_PORT_IRQ) { |
| 2054 | tmp = I915_READ(GEN8_DE_PORT_IIR); |
| 2055 | if (tmp & GEN8_AUX_CHANNEL_A) |
| 2056 | dp_aux_irq_handler(dev); |
| 2057 | else if (tmp) |
| 2058 | DRM_ERROR("Unexpected DE Port interrupt\n" ); |
| 2059 | else |
| 2060 | DRM_ERROR("The master control interrupt lied (DE PORT)!\n" ); |
| 2061 | |
| 2062 | if (tmp) { |
| 2063 | I915_WRITE(GEN8_DE_PORT_IIR, tmp); |
| 2064 | ret = IRQ_HANDLED; |
| 2065 | } |
| 2066 | } |
| 2067 | |
| 2068 | for_each_pipe(pipe) { |
| 2069 | uint32_t pipe_iir; |
| 2070 | |
| 2071 | if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe))) |
| 2072 | continue; |
| 2073 | |
| 2074 | pipe_iir = I915_READ(GEN8_DE_PIPE_IIR(pipe)); |
| 2075 | if (pipe_iir & GEN8_PIPE_VBLANK) |
| 2076 | drm_handle_vblank(dev, pipe); |
| 2077 | |
| 2078 | if (pipe_iir & GEN8_PIPE_FLIP_DONE) { |
| 2079 | intel_prepare_page_flip(dev, pipe); |
| 2080 | intel_finish_page_flip_plane(dev, pipe); |
| 2081 | } |
| 2082 | |
| 2083 | if (pipe_iir & GEN8_PIPE_CDCLK_CRC_DONE) |
| 2084 | hsw_pipe_crc_irq_handler(dev, pipe); |
| 2085 | |
| 2086 | if (pipe_iir & GEN8_PIPE_FIFO_UNDERRUN) { |
| 2087 | if (intel_set_cpu_fifo_underrun_reporting(dev, pipe, |
| 2088 | false)) |
| 2089 | DRM_ERROR("Pipe %c FIFO underrun\n" , |
| 2090 | pipe_name(pipe)); |
| 2091 | } |
| 2092 | |
| 2093 | if (pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS) { |
| 2094 | DRM_ERROR("Fault errors on pipe %c\n: 0x%08x" , |
| 2095 | pipe_name(pipe), |
| 2096 | pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS); |
| 2097 | } |
| 2098 | |
| 2099 | if (pipe_iir) { |
| 2100 | ret = IRQ_HANDLED; |
| 2101 | I915_WRITE(GEN8_DE_PIPE_IIR(pipe), pipe_iir); |
| 2102 | } else |
| 2103 | DRM_ERROR("The master control interrupt lied (DE PIPE)!\n" ); |
| 2104 | } |
| 2105 | |
| 2106 | if (!HAS_PCH_NOP(dev) && master_ctl & GEN8_DE_PCH_IRQ) { |
| 2107 | /* |
| 2108 | * FIXME(BDW): Assume for now that the new interrupt handling |
| 2109 | * scheme also closed the SDE interrupt handling race we've seen |
| 2110 | * on older pch-split platforms. But this needs testing. |
| 2111 | */ |
| 2112 | u32 pch_iir = I915_READ(SDEIIR); |
| 2113 | |
| 2114 | cpt_irq_handler(dev, pch_iir); |
| 2115 | |
| 2116 | if (pch_iir) { |
| 2117 | I915_WRITE(SDEIIR, pch_iir); |
| 2118 | ret = IRQ_HANDLED; |
| 2119 | } |
| 2120 | } |
| 2121 | |
| 2122 | I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL); |
| 2123 | POSTING_READ(GEN8_MASTER_IRQ); |
| 2124 | |
| 2125 | return ret; |
| 2126 | } |
| 2127 | |
| 2128 | static void i915_error_wake_up(struct drm_i915_private *dev_priv, |
| 2129 | bool reset_completed) |
| 2130 | { |
| 2131 | struct intel_ring_buffer *ring; |
| 2132 | int i; |
| 2133 | |
| 2134 | /* |
| 2135 | * Notify all waiters for GPU completion events that reset state has |
| 2136 | * been changed, and that they need to restart their wait after |
| 2137 | * checking for potential errors (and bail out to drop locks if there is |
| 2138 | * a gpu reset pending so that i915_error_work_func can acquire them). |
| 2139 | */ |
| 2140 | |
| 2141 | assert_spin_locked(&dev_priv->irq_lock); |
| 2142 | #ifdef __NetBSD__ |
| 2143 | for_each_ring(ring, dev_priv, i) |
| 2144 | DRM_SPIN_WAKEUP_ALL(&ring->irq_queue, &dev_priv->irq_lock); |
| 2145 | |
| 2146 | spin_lock(&dev_priv->pending_flip_lock); |
| 2147 | DRM_SPIN_WAKEUP_ALL(&dev_priv->pending_flip_queue, |
| 2148 | &dev_priv->pending_flip_lock); |
| 2149 | spin_unlock(&dev_priv->pending_flip_lock); |
| 2150 | |
| 2151 | if (reset_completed) { |
| 2152 | spin_lock(&dev_priv->gpu_error.reset_lock); |
| 2153 | DRM_SPIN_WAKEUP_ALL(&dev_priv->gpu_error.reset_queue, |
| 2154 | &dev_priv->gpu_error.reset_lock); |
| 2155 | spin_unlock(&dev_priv->gpu_error.reset_lock); |
| 2156 | } |
| 2157 | #else |
| 2158 | /* Wake up __wait_seqno, potentially holding dev->struct_mutex. */ |
| 2159 | for_each_ring(ring, dev_priv, i) |
| 2160 | wake_up_all(&ring->irq_queue); |
| 2161 | |
| 2162 | /* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */ |
| 2163 | wake_up_all(&dev_priv->pending_flip_queue); |
| 2164 | |
| 2165 | /* |
| 2166 | * Signal tasks blocked in i915_gem_wait_for_error that the pending |
| 2167 | * reset state is cleared. |
| 2168 | */ |
| 2169 | if (reset_completed) |
| 2170 | wake_up_all(&dev_priv->gpu_error.reset_queue); |
| 2171 | #endif |
| 2172 | } |
| 2173 | |
| 2174 | /** |
| 2175 | * i915_error_work_func - do process context error handling work |
| 2176 | * @work: work struct |
| 2177 | * |
| 2178 | * Fire an error uevent so userspace can see that a hang or error |
| 2179 | * was detected. |
| 2180 | */ |
| 2181 | static void i915_error_work_func(struct work_struct *work) |
| 2182 | { |
| 2183 | struct i915_gpu_error *error = container_of(work, struct i915_gpu_error, |
| 2184 | work); |
| 2185 | struct drm_i915_private *dev_priv = |
| 2186 | container_of(error, struct drm_i915_private, gpu_error); |
| 2187 | struct drm_device *dev = dev_priv->dev; |
| 2188 | #ifndef __NetBSD__ |
| 2189 | char *error_event[] = { I915_ERROR_UEVENT "=1" , NULL }; |
| 2190 | char *reset_event[] = { I915_RESET_UEVENT "=1" , NULL }; |
| 2191 | char *reset_done_event[] = { I915_ERROR_UEVENT "=0" , NULL }; |
| 2192 | #endif |
| 2193 | int ret; |
| 2194 | |
| 2195 | #ifndef __NetBSD__ |
| 2196 | kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, error_event); |
| 2197 | #endif |
| 2198 | |
| 2199 | /* |
| 2200 | * Note that there's only one work item which does gpu resets, so we |
| 2201 | * need not worry about concurrent gpu resets potentially incrementing |
| 2202 | * error->reset_counter twice. We only need to take care of another |
| 2203 | * racing irq/hangcheck declaring the gpu dead for a second time. A |
| 2204 | * quick check for that is good enough: schedule_work ensures the |
| 2205 | * correct ordering between hang detection and this work item, and since |
| 2206 | * the reset in-progress bit is only ever set by code outside of this |
| 2207 | * work we don't need to worry about any other races. |
| 2208 | */ |
| 2209 | if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) { |
| 2210 | DRM_DEBUG_DRIVER("resetting chip\n" ); |
| 2211 | #ifndef __NetBSD__ |
| 2212 | kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, |
| 2213 | reset_event); |
| 2214 | #endif |
| 2215 | |
| 2216 | /* |
| 2217 | * All state reset _must_ be completed before we update the |
| 2218 | * reset counter, for otherwise waiters might miss the reset |
| 2219 | * pending state and not properly drop locks, resulting in |
| 2220 | * deadlocks with the reset work. |
| 2221 | */ |
| 2222 | ret = i915_reset(dev); |
| 2223 | |
| 2224 | intel_display_handle_reset(dev); |
| 2225 | |
| 2226 | if (ret == 0) { |
| 2227 | /* |
| 2228 | * After all the gem state is reset, increment the reset |
| 2229 | * counter and wake up everyone waiting for the reset to |
| 2230 | * complete. |
| 2231 | * |
| 2232 | * Since unlock operations are a one-sided barrier only, |
| 2233 | * we need to insert a barrier here to order any seqno |
| 2234 | * updates before |
| 2235 | * the counter increment. |
| 2236 | */ |
| 2237 | smp_mb__before_atomic_inc(); |
| 2238 | atomic_inc(&dev_priv->gpu_error.reset_counter); |
| 2239 | |
| 2240 | #ifndef __NetBSD__ |
| 2241 | kobject_uevent_env(&dev->primary->kdev->kobj, |
| 2242 | KOBJ_CHANGE, reset_done_event); |
| 2243 | #endif |
| 2244 | } else { |
| 2245 | atomic_set_mask(I915_WEDGED, &error->reset_counter); |
| 2246 | } |
| 2247 | |
| 2248 | /* |
| 2249 | * Note: The wake_up also serves as a memory barrier so that |
| 2250 | * waiters see the update value of the reset counter atomic_t. |
| 2251 | */ |
| 2252 | spin_lock(&dev_priv->irq_lock); |
| 2253 | i915_error_wake_up(dev_priv, true); |
| 2254 | spin_unlock(&dev_priv->irq_lock); |
| 2255 | } |
| 2256 | } |
| 2257 | |
| 2258 | static void i915_report_and_clear_eir(struct drm_device *dev) |
| 2259 | { |
| 2260 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2261 | uint32_t instdone[I915_NUM_INSTDONE_REG]; |
| 2262 | u32 eir = I915_READ(EIR); |
| 2263 | int pipe, i; |
| 2264 | |
| 2265 | if (!eir) |
| 2266 | return; |
| 2267 | |
| 2268 | pr_err("render error detected, EIR: 0x%08x\n" , eir); |
| 2269 | |
| 2270 | i915_get_extra_instdone(dev, instdone); |
| 2271 | |
| 2272 | if (IS_G4X(dev)) { |
| 2273 | if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) { |
| 2274 | u32 ipeir = I915_READ(IPEIR_I965); |
| 2275 | |
| 2276 | pr_err(" IPEIR: 0x%08x\n" , I915_READ(IPEIR_I965)); |
| 2277 | pr_err(" IPEHR: 0x%08x\n" , I915_READ(IPEHR_I965)); |
| 2278 | for (i = 0; i < ARRAY_SIZE(instdone); i++) |
| 2279 | pr_err(" INSTDONE_%d: 0x%08x\n" , i, instdone[i]); |
| 2280 | pr_err(" INSTPS: 0x%08x\n" , I915_READ(INSTPS)); |
| 2281 | pr_err(" ACTHD: 0x%08x\n" , I915_READ(ACTHD_I965)); |
| 2282 | I915_WRITE(IPEIR_I965, ipeir); |
| 2283 | POSTING_READ(IPEIR_I965); |
| 2284 | } |
| 2285 | if (eir & GM45_ERROR_PAGE_TABLE) { |
| 2286 | u32 pgtbl_err = I915_READ(PGTBL_ER); |
| 2287 | pr_err("page table error\n" ); |
| 2288 | pr_err(" PGTBL_ER: 0x%08x\n" , pgtbl_err); |
| 2289 | I915_WRITE(PGTBL_ER, pgtbl_err); |
| 2290 | POSTING_READ(PGTBL_ER); |
| 2291 | } |
| 2292 | } |
| 2293 | |
| 2294 | if (!IS_GEN2(dev)) { |
| 2295 | if (eir & I915_ERROR_PAGE_TABLE) { |
| 2296 | u32 pgtbl_err = I915_READ(PGTBL_ER); |
| 2297 | pr_err("page table error\n" ); |
| 2298 | pr_err(" PGTBL_ER: 0x%08x\n" , pgtbl_err); |
| 2299 | I915_WRITE(PGTBL_ER, pgtbl_err); |
| 2300 | POSTING_READ(PGTBL_ER); |
| 2301 | } |
| 2302 | } |
| 2303 | |
| 2304 | if (eir & I915_ERROR_MEMORY_REFRESH) { |
| 2305 | pr_err("memory refresh error:\n" ); |
| 2306 | for_each_pipe(pipe) |
| 2307 | pr_err("pipe %c stat: 0x%08x\n" , |
| 2308 | pipe_name(pipe), I915_READ(PIPESTAT(pipe))); |
| 2309 | /* pipestat has already been acked */ |
| 2310 | } |
| 2311 | if (eir & I915_ERROR_INSTRUCTION) { |
| 2312 | pr_err("instruction error\n" ); |
| 2313 | pr_err(" INSTPM: 0x%08x\n" , I915_READ(INSTPM)); |
| 2314 | for (i = 0; i < ARRAY_SIZE(instdone); i++) |
| 2315 | pr_err(" INSTDONE_%d: 0x%08x\n" , i, instdone[i]); |
| 2316 | if (INTEL_INFO(dev)->gen < 4) { |
| 2317 | u32 ipeir = I915_READ(IPEIR); |
| 2318 | |
| 2319 | pr_err(" IPEIR: 0x%08x\n" , I915_READ(IPEIR)); |
| 2320 | pr_err(" IPEHR: 0x%08x\n" , I915_READ(IPEHR)); |
| 2321 | pr_err(" ACTHD: 0x%08x\n" , I915_READ(ACTHD)); |
| 2322 | I915_WRITE(IPEIR, ipeir); |
| 2323 | POSTING_READ(IPEIR); |
| 2324 | } else { |
| 2325 | u32 ipeir = I915_READ(IPEIR_I965); |
| 2326 | |
| 2327 | pr_err(" IPEIR: 0x%08x\n" , I915_READ(IPEIR_I965)); |
| 2328 | pr_err(" IPEHR: 0x%08x\n" , I915_READ(IPEHR_I965)); |
| 2329 | pr_err(" INSTPS: 0x%08x\n" , I915_READ(INSTPS)); |
| 2330 | pr_err(" ACTHD: 0x%08x\n" , I915_READ(ACTHD_I965)); |
| 2331 | I915_WRITE(IPEIR_I965, ipeir); |
| 2332 | POSTING_READ(IPEIR_I965); |
| 2333 | } |
| 2334 | } |
| 2335 | |
| 2336 | I915_WRITE(EIR, eir); |
| 2337 | POSTING_READ(EIR); |
| 2338 | eir = I915_READ(EIR); |
| 2339 | if (eir) { |
| 2340 | /* |
| 2341 | * some errors might have become stuck, |
| 2342 | * mask them. |
| 2343 | */ |
| 2344 | DRM_ERROR("EIR stuck: 0x%08x, masking\n" , eir); |
| 2345 | I915_WRITE(EMR, I915_READ(EMR) | eir); |
| 2346 | I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); |
| 2347 | } |
| 2348 | } |
| 2349 | |
| 2350 | /** |
| 2351 | * i915_handle_error - handle an error interrupt |
| 2352 | * @dev: drm device |
| 2353 | * |
| 2354 | * Do some basic checking of regsiter state at error interrupt time and |
| 2355 | * dump it to the syslog. Also call i915_capture_error_state() to make |
| 2356 | * sure we get a record and make it available in debugfs. Fire a uevent |
| 2357 | * so userspace knows something bad happened (should trigger collection |
| 2358 | * of a ring dump etc.). |
| 2359 | */ |
| 2360 | void i915_handle_error(struct drm_device *dev, bool wedged, |
| 2361 | const char *fmt, ...) |
| 2362 | { |
| 2363 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2364 | va_list args; |
| 2365 | char error_msg[80]; |
| 2366 | |
| 2367 | assert_spin_locked(&dev_priv->irq_lock); |
| 2368 | |
| 2369 | va_start(args, fmt); |
| 2370 | vscnprintf(error_msg, sizeof(error_msg), fmt, args); |
| 2371 | va_end(args); |
| 2372 | |
| 2373 | i915_capture_error_state(dev, wedged, error_msg); |
| 2374 | i915_report_and_clear_eir(dev); |
| 2375 | |
| 2376 | if (wedged) { |
| 2377 | atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG, |
| 2378 | &dev_priv->gpu_error.reset_counter); |
| 2379 | |
| 2380 | /* |
| 2381 | * Wakeup waiting processes so that the reset work function |
| 2382 | * i915_error_work_func doesn't deadlock trying to grab various |
| 2383 | * locks. By bumping the reset counter first, the woken |
| 2384 | * processes will see a reset in progress and back off, |
| 2385 | * releasing their locks and then wait for the reset completion. |
| 2386 | * We must do this for _all_ gpu waiters that might hold locks |
| 2387 | * that the reset work needs to acquire. |
| 2388 | * |
| 2389 | * Note: The wake_up serves as the required memory barrier to |
| 2390 | * ensure that the waiters see the updated value of the reset |
| 2391 | * counter atomic_t. |
| 2392 | */ |
| 2393 | i915_error_wake_up(dev_priv, false); |
| 2394 | } |
| 2395 | |
| 2396 | /* |
| 2397 | * Our reset work can grab modeset locks (since it needs to reset the |
| 2398 | * state of outstanding pagelips). Hence it must not be run on our own |
| 2399 | * dev-priv->wq work queue for otherwise the flush_work in the pageflip |
| 2400 | * code will deadlock. |
| 2401 | */ |
| 2402 | schedule_work(&dev_priv->gpu_error.work); |
| 2403 | } |
| 2404 | |
| 2405 | static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe) |
| 2406 | { |
| 2407 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2408 | struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; |
| 2409 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| 2410 | struct drm_i915_gem_object *obj; |
| 2411 | struct intel_unpin_work *work; |
| 2412 | unsigned long flags; |
| 2413 | bool stall_detected; |
| 2414 | |
| 2415 | /* Ignore early vblank irqs */ |
| 2416 | if (intel_crtc == NULL) |
| 2417 | return; |
| 2418 | |
| 2419 | spin_lock_irqsave(&dev->event_lock, flags); |
| 2420 | work = intel_crtc->unpin_work; |
| 2421 | |
| 2422 | if (work == NULL || |
| 2423 | atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE || |
| 2424 | !work->enable_stall_check) { |
| 2425 | /* Either the pending flip IRQ arrived, or we're too early. Don't check */ |
| 2426 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 2427 | return; |
| 2428 | } |
| 2429 | |
| 2430 | /* Potential stall - if we see that the flip has happened, assume a missed interrupt */ |
| 2431 | obj = work->pending_flip_obj; |
| 2432 | if (INTEL_INFO(dev)->gen >= 4) { |
| 2433 | int dspsurf = DSPSURF(intel_crtc->plane); |
| 2434 | stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) == |
| 2435 | i915_gem_obj_ggtt_offset(obj); |
| 2436 | } else { |
| 2437 | int dspaddr = DSPADDR(intel_crtc->plane); |
| 2438 | stall_detected = I915_READ(dspaddr) == (i915_gem_obj_ggtt_offset(obj) + |
| 2439 | crtc->y * crtc->primary->fb->pitches[0] + |
| 2440 | crtc->x * crtc->primary->fb->bits_per_pixel/8); |
| 2441 | } |
| 2442 | |
| 2443 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 2444 | |
| 2445 | if (stall_detected) { |
| 2446 | DRM_DEBUG_DRIVER("Pageflip stall detected\n" ); |
| 2447 | intel_prepare_page_flip(dev, intel_crtc->plane); |
| 2448 | } |
| 2449 | } |
| 2450 | |
| 2451 | /* Called from drm generic code, passed 'crtc' which |
| 2452 | * we use as a pipe index |
| 2453 | */ |
| 2454 | static int i915_enable_vblank(struct drm_device *dev, int pipe) |
| 2455 | { |
| 2456 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2457 | unsigned long irqflags; |
| 2458 | |
| 2459 | if (!i915_pipe_enabled(dev, pipe)) |
| 2460 | return -EINVAL; |
| 2461 | |
| 2462 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 2463 | if (INTEL_INFO(dev)->gen >= 4) |
| 2464 | i915_enable_pipestat(dev_priv, pipe, |
| 2465 | PIPE_START_VBLANK_INTERRUPT_STATUS); |
| 2466 | else |
| 2467 | i915_enable_pipestat(dev_priv, pipe, |
| 2468 | PIPE_VBLANK_INTERRUPT_STATUS); |
| 2469 | |
| 2470 | /* maintain vblank delivery even in deep C-states */ |
| 2471 | if (INTEL_INFO(dev)->gen == 3) |
| 2472 | I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS)); |
| 2473 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 2474 | |
| 2475 | return 0; |
| 2476 | } |
| 2477 | |
| 2478 | static int ironlake_enable_vblank(struct drm_device *dev, int pipe) |
| 2479 | { |
| 2480 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2481 | unsigned long irqflags; |
| 2482 | uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) : |
| 2483 | DE_PIPE_VBLANK(pipe); |
| 2484 | |
| 2485 | if (!i915_pipe_enabled(dev, pipe)) |
| 2486 | return -EINVAL; |
| 2487 | |
| 2488 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 2489 | ironlake_enable_display_irq(dev_priv, bit); |
| 2490 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 2491 | |
| 2492 | return 0; |
| 2493 | } |
| 2494 | |
| 2495 | static int valleyview_enable_vblank(struct drm_device *dev, int pipe) |
| 2496 | { |
| 2497 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2498 | unsigned long irqflags; |
| 2499 | |
| 2500 | if (!i915_pipe_enabled(dev, pipe)) |
| 2501 | return -EINVAL; |
| 2502 | |
| 2503 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 2504 | i915_enable_pipestat(dev_priv, pipe, |
| 2505 | PIPE_START_VBLANK_INTERRUPT_STATUS); |
| 2506 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 2507 | |
| 2508 | return 0; |
| 2509 | } |
| 2510 | |
| 2511 | static int gen8_enable_vblank(struct drm_device *dev, int pipe) |
| 2512 | { |
| 2513 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2514 | unsigned long irqflags; |
| 2515 | |
| 2516 | if (!i915_pipe_enabled(dev, pipe)) |
| 2517 | return -EINVAL; |
| 2518 | |
| 2519 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 2520 | dev_priv->de_irq_mask[pipe] &= ~GEN8_PIPE_VBLANK; |
| 2521 | I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]); |
| 2522 | POSTING_READ(GEN8_DE_PIPE_IMR(pipe)); |
| 2523 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 2524 | return 0; |
| 2525 | } |
| 2526 | |
| 2527 | /* Called from drm generic code, passed 'crtc' which |
| 2528 | * we use as a pipe index |
| 2529 | */ |
| 2530 | static void i915_disable_vblank(struct drm_device *dev, int pipe) |
| 2531 | { |
| 2532 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2533 | unsigned long irqflags; |
| 2534 | |
| 2535 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 2536 | if (INTEL_INFO(dev)->gen == 3) |
| 2537 | I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS)); |
| 2538 | |
| 2539 | i915_disable_pipestat(dev_priv, pipe, |
| 2540 | PIPE_VBLANK_INTERRUPT_STATUS | |
| 2541 | PIPE_START_VBLANK_INTERRUPT_STATUS); |
| 2542 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 2543 | } |
| 2544 | |
| 2545 | static void ironlake_disable_vblank(struct drm_device *dev, int pipe) |
| 2546 | { |
| 2547 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2548 | unsigned long irqflags; |
| 2549 | uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) : |
| 2550 | DE_PIPE_VBLANK(pipe); |
| 2551 | |
| 2552 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 2553 | ironlake_disable_display_irq(dev_priv, bit); |
| 2554 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 2555 | } |
| 2556 | |
| 2557 | static void valleyview_disable_vblank(struct drm_device *dev, int pipe) |
| 2558 | { |
| 2559 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2560 | unsigned long irqflags; |
| 2561 | |
| 2562 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 2563 | i915_disable_pipestat(dev_priv, pipe, |
| 2564 | PIPE_START_VBLANK_INTERRUPT_STATUS); |
| 2565 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 2566 | } |
| 2567 | |
| 2568 | static void gen8_disable_vblank(struct drm_device *dev, int pipe) |
| 2569 | { |
| 2570 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2571 | unsigned long irqflags; |
| 2572 | |
| 2573 | if (!i915_pipe_enabled(dev, pipe)) |
| 2574 | return; |
| 2575 | |
| 2576 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 2577 | dev_priv->de_irq_mask[pipe] |= GEN8_PIPE_VBLANK; |
| 2578 | I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]); |
| 2579 | POSTING_READ(GEN8_DE_PIPE_IMR(pipe)); |
| 2580 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 2581 | } |
| 2582 | |
| 2583 | static u32 |
| 2584 | ring_last_seqno(struct intel_ring_buffer *ring) |
| 2585 | { |
| 2586 | return list_entry(ring->request_list.prev, |
| 2587 | struct drm_i915_gem_request, list)->seqno; |
| 2588 | } |
| 2589 | |
| 2590 | static bool |
| 2591 | ring_idle(struct intel_ring_buffer *ring, u32 seqno) |
| 2592 | { |
| 2593 | return (list_empty(&ring->request_list) || |
| 2594 | i915_seqno_passed(seqno, ring_last_seqno(ring))); |
| 2595 | } |
| 2596 | |
| 2597 | static struct intel_ring_buffer * |
| 2598 | semaphore_waits_for(struct intel_ring_buffer *ring, u32 *seqno) |
| 2599 | { |
| 2600 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 2601 | u32 cmd, ipehr, head; |
| 2602 | int i; |
| 2603 | |
| 2604 | ipehr = I915_READ(RING_IPEHR(ring->mmio_base)); |
| 2605 | if ((ipehr & ~(0x3 << 16)) != |
| 2606 | (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE | MI_SEMAPHORE_REGISTER)) |
| 2607 | return NULL; |
| 2608 | |
| 2609 | /* |
| 2610 | * HEAD is likely pointing to the dword after the actual command, |
| 2611 | * so scan backwards until we find the MBOX. But limit it to just 3 |
| 2612 | * dwords. Note that we don't care about ACTHD here since that might |
| 2613 | * point at at batch, and semaphores are always emitted into the |
| 2614 | * ringbuffer itself. |
| 2615 | */ |
| 2616 | head = I915_READ_HEAD(ring) & HEAD_ADDR; |
| 2617 | |
| 2618 | for (i = 4; i; --i) { |
| 2619 | /* |
| 2620 | * Be paranoid and presume the hw has gone off into the wild - |
| 2621 | * our ring is smaller than what the hardware (and hence |
| 2622 | * HEAD_ADDR) allows. Also handles wrap-around. |
| 2623 | */ |
| 2624 | head &= ring->size - 1; |
| 2625 | |
| 2626 | /* This here seems to blow up */ |
| 2627 | #ifdef __NetBSD__ |
| 2628 | cmd = bus_space_read_4(ring->bst, ring->bsh, head); |
| 2629 | #else |
| 2630 | cmd = ioread32(ring->virtual_start + head); |
| 2631 | #endif |
| 2632 | if (cmd == ipehr) |
| 2633 | break; |
| 2634 | |
| 2635 | head -= 4; |
| 2636 | } |
| 2637 | |
| 2638 | if (!i) |
| 2639 | return NULL; |
| 2640 | |
| 2641 | #ifdef __NetBSD__ |
| 2642 | *seqno = bus_space_read_4(ring->bst, ring->bsh, head + 4) + 1; |
| 2643 | #else |
| 2644 | *seqno = ioread32(ring->virtual_start + head + 4) + 1; |
| 2645 | #endif |
| 2646 | return &dev_priv->ring[(ring->id + (((ipehr >> 17) & 1) + 1)) % 3]; |
| 2647 | } |
| 2648 | |
| 2649 | static int semaphore_passed(struct intel_ring_buffer *ring) |
| 2650 | { |
| 2651 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| 2652 | struct intel_ring_buffer *signaller; |
| 2653 | u32 seqno, ctl; |
| 2654 | |
| 2655 | ring->hangcheck.deadlock = true; |
| 2656 | |
| 2657 | signaller = semaphore_waits_for(ring, &seqno); |
| 2658 | if (signaller == NULL || signaller->hangcheck.deadlock) |
| 2659 | return -1; |
| 2660 | |
| 2661 | /* cursory check for an unkickable deadlock */ |
| 2662 | ctl = I915_READ_CTL(signaller); |
| 2663 | if (ctl & RING_WAIT_SEMAPHORE && semaphore_passed(signaller) < 0) |
| 2664 | return -1; |
| 2665 | |
| 2666 | return i915_seqno_passed(signaller->get_seqno(signaller, false), seqno); |
| 2667 | } |
| 2668 | |
| 2669 | static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv) |
| 2670 | { |
| 2671 | struct intel_ring_buffer *ring; |
| 2672 | int i; |
| 2673 | |
| 2674 | for_each_ring(ring, dev_priv, i) |
| 2675 | ring->hangcheck.deadlock = false; |
| 2676 | } |
| 2677 | |
| 2678 | static enum intel_ring_hangcheck_action |
| 2679 | ring_stuck(struct intel_ring_buffer *ring, u64 acthd) |
| 2680 | { |
| 2681 | struct drm_device *dev = ring->dev; |
| 2682 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2683 | u32 tmp; |
| 2684 | |
| 2685 | if (ring->hangcheck.acthd != acthd) |
| 2686 | return HANGCHECK_ACTIVE; |
| 2687 | |
| 2688 | if (IS_GEN2(dev)) |
| 2689 | return HANGCHECK_HUNG; |
| 2690 | |
| 2691 | /* Is the chip hanging on a WAIT_FOR_EVENT? |
| 2692 | * If so we can simply poke the RB_WAIT bit |
| 2693 | * and break the hang. This should work on |
| 2694 | * all but the second generation chipsets. |
| 2695 | */ |
| 2696 | tmp = I915_READ_CTL(ring); |
| 2697 | if (tmp & RING_WAIT) { |
| 2698 | i915_handle_error(dev, false, |
| 2699 | "Kicking stuck wait on %s" , |
| 2700 | ring->name); |
| 2701 | I915_WRITE_CTL(ring, tmp); |
| 2702 | return HANGCHECK_KICK; |
| 2703 | } |
| 2704 | |
| 2705 | if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) { |
| 2706 | switch (semaphore_passed(ring)) { |
| 2707 | default: |
| 2708 | return HANGCHECK_HUNG; |
| 2709 | case 1: |
| 2710 | i915_handle_error(dev, false, |
| 2711 | "Kicking stuck semaphore on %s" , |
| 2712 | ring->name); |
| 2713 | I915_WRITE_CTL(ring, tmp); |
| 2714 | return HANGCHECK_KICK; |
| 2715 | case 0: |
| 2716 | return HANGCHECK_WAIT; |
| 2717 | } |
| 2718 | } |
| 2719 | |
| 2720 | return HANGCHECK_HUNG; |
| 2721 | } |
| 2722 | |
| 2723 | /** |
| 2724 | * This is called when the chip hasn't reported back with completed |
| 2725 | * batchbuffers in a long time. We keep track per ring seqno progress and |
| 2726 | * if there are no progress, hangcheck score for that ring is increased. |
| 2727 | * Further, acthd is inspected to see if the ring is stuck. On stuck case |
| 2728 | * we kick the ring. If we see no progress on three subsequent calls |
| 2729 | * we assume chip is wedged and try to fix it by resetting the chip. |
| 2730 | */ |
| 2731 | static void i915_hangcheck_elapsed(unsigned long data) |
| 2732 | { |
| 2733 | struct drm_device *dev = (struct drm_device *)data; |
| 2734 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2735 | struct intel_ring_buffer *ring; |
| 2736 | int i; |
| 2737 | int busy_count = 0, rings_hung = 0; |
| 2738 | bool stuck[I915_NUM_RINGS] = { 0 }; |
| 2739 | #define BUSY 1 |
| 2740 | #define KICK 5 |
| 2741 | #define HUNG 20 |
| 2742 | |
| 2743 | if (!i915.enable_hangcheck) |
| 2744 | return; |
| 2745 | |
| 2746 | spin_lock(&dev_priv->irq_lock); |
| 2747 | |
| 2748 | for_each_ring(ring, dev_priv, i) { |
| 2749 | u64 acthd; |
| 2750 | u32 seqno; |
| 2751 | bool busy = true; |
| 2752 | |
| 2753 | semaphore_clear_deadlocks(dev_priv); |
| 2754 | |
| 2755 | seqno = ring->get_seqno(ring, false); |
| 2756 | acthd = intel_ring_get_active_head(ring); |
| 2757 | |
| 2758 | if (ring->hangcheck.seqno == seqno) { |
| 2759 | if (ring_idle(ring, seqno)) { |
| 2760 | ring->hangcheck.action = HANGCHECK_IDLE; |
| 2761 | #ifdef __NetBSD__ |
| 2762 | if (DRM_SPIN_WAITERS_P(&ring->irq_queue, |
| 2763 | &dev_priv->irq_lock)) { |
| 2764 | if (!test_and_set_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings)) { |
| 2765 | if (!(dev_priv->gpu_error.test_irq_rings & intel_ring_flag(ring))) |
| 2766 | DRM_ERROR("Hangcheck timer elapsed... %s idle\n" , |
| 2767 | ring->name); |
| 2768 | else |
| 2769 | DRM_INFO("Fake missed irq on %s\n" , |
| 2770 | ring->name); |
| 2771 | DRM_SPIN_WAKEUP_ALL(&ring->irq_queue, &dev_priv->irq_lock); |
| 2772 | } |
| 2773 | ring->hangcheck.score += BUSY; |
| 2774 | } else { |
| 2775 | busy = false; |
| 2776 | } |
| 2777 | #else |
| 2778 | if (waitqueue_active(&ring->irq_queue)) { |
| 2779 | /* Issue a wake-up to catch stuck h/w. */ |
| 2780 | if (!test_and_set_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings)) { |
| 2781 | if (!(dev_priv->gpu_error.test_irq_rings & intel_ring_flag(ring))) |
| 2782 | DRM_ERROR("Hangcheck timer elapsed... %s idle\n" , |
| 2783 | ring->name); |
| 2784 | else |
| 2785 | DRM_INFO("Fake missed irq on %s\n" , |
| 2786 | ring->name); |
| 2787 | wake_up_all(&ring->irq_queue); |
| 2788 | } |
| 2789 | /* Safeguard against driver failure */ |
| 2790 | ring->hangcheck.score += BUSY; |
| 2791 | } else |
| 2792 | busy = false; |
| 2793 | #endif |
| 2794 | } else { |
| 2795 | /* We always increment the hangcheck score |
| 2796 | * if the ring is busy and still processing |
| 2797 | * the same request, so that no single request |
| 2798 | * can run indefinitely (such as a chain of |
| 2799 | * batches). The only time we do not increment |
| 2800 | * the hangcheck score on this ring, if this |
| 2801 | * ring is in a legitimate wait for another |
| 2802 | * ring. In that case the waiting ring is a |
| 2803 | * victim and we want to be sure we catch the |
| 2804 | * right culprit. Then every time we do kick |
| 2805 | * the ring, add a small increment to the |
| 2806 | * score so that we can catch a batch that is |
| 2807 | * being repeatedly kicked and so responsible |
| 2808 | * for stalling the machine. |
| 2809 | */ |
| 2810 | ring->hangcheck.action = ring_stuck(ring, |
| 2811 | acthd); |
| 2812 | |
| 2813 | switch (ring->hangcheck.action) { |
| 2814 | case HANGCHECK_IDLE: |
| 2815 | case HANGCHECK_WAIT: |
| 2816 | break; |
| 2817 | case HANGCHECK_ACTIVE: |
| 2818 | ring->hangcheck.score += BUSY; |
| 2819 | break; |
| 2820 | case HANGCHECK_KICK: |
| 2821 | ring->hangcheck.score += KICK; |
| 2822 | break; |
| 2823 | case HANGCHECK_HUNG: |
| 2824 | ring->hangcheck.score += HUNG; |
| 2825 | stuck[i] = true; |
| 2826 | break; |
| 2827 | } |
| 2828 | } |
| 2829 | } else { |
| 2830 | ring->hangcheck.action = HANGCHECK_ACTIVE; |
| 2831 | |
| 2832 | /* Gradually reduce the count so that we catch DoS |
| 2833 | * attempts across multiple batches. |
| 2834 | */ |
| 2835 | if (ring->hangcheck.score > 0) |
| 2836 | ring->hangcheck.score--; |
| 2837 | } |
| 2838 | |
| 2839 | ring->hangcheck.seqno = seqno; |
| 2840 | ring->hangcheck.acthd = acthd; |
| 2841 | busy_count += busy; |
| 2842 | } |
| 2843 | |
| 2844 | for_each_ring(ring, dev_priv, i) { |
| 2845 | if (ring->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG) { |
| 2846 | DRM_INFO("%s on %s\n" , |
| 2847 | stuck[i] ? "stuck" : "no progress" , |
| 2848 | ring->name); |
| 2849 | rings_hung++; |
| 2850 | } |
| 2851 | } |
| 2852 | |
| 2853 | if (rings_hung) { |
| 2854 | i915_handle_error(dev, true, "Ring hung" ); |
| 2855 | spin_unlock(&dev_priv->irq_lock); |
| 2856 | return; |
| 2857 | } |
| 2858 | |
| 2859 | spin_unlock(&dev_priv->irq_lock); |
| 2860 | |
| 2861 | if (busy_count) |
| 2862 | /* Reset timer case chip hangs without another request |
| 2863 | * being added */ |
| 2864 | i915_queue_hangcheck(dev); |
| 2865 | } |
| 2866 | |
| 2867 | void i915_queue_hangcheck(struct drm_device *dev) |
| 2868 | { |
| 2869 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2870 | if (!i915.enable_hangcheck) |
| 2871 | return; |
| 2872 | |
| 2873 | mod_timer(&dev_priv->gpu_error.hangcheck_timer, |
| 2874 | round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES)); |
| 2875 | } |
| 2876 | |
| 2877 | static void ibx_irq_preinstall(struct drm_device *dev) |
| 2878 | { |
| 2879 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2880 | |
| 2881 | if (HAS_PCH_NOP(dev)) |
| 2882 | return; |
| 2883 | |
| 2884 | /* south display irq */ |
| 2885 | I915_WRITE(SDEIMR, 0xffffffff); |
| 2886 | /* |
| 2887 | * SDEIER is also touched by the interrupt handler to work around missed |
| 2888 | * PCH interrupts. Hence we can't update it after the interrupt handler |
| 2889 | * is enabled - instead we unconditionally enable all PCH interrupt |
| 2890 | * sources here, but then only unmask them as needed with SDEIMR. |
| 2891 | */ |
| 2892 | I915_WRITE(SDEIER, 0xffffffff); |
| 2893 | POSTING_READ(SDEIER); |
| 2894 | } |
| 2895 | |
| 2896 | static void gen5_gt_irq_preinstall(struct drm_device *dev) |
| 2897 | { |
| 2898 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2899 | |
| 2900 | /* and GT */ |
| 2901 | I915_WRITE(GTIMR, 0xffffffff); |
| 2902 | I915_WRITE(GTIER, 0x0); |
| 2903 | POSTING_READ(GTIER); |
| 2904 | |
| 2905 | if (INTEL_INFO(dev)->gen >= 6) { |
| 2906 | /* and PM */ |
| 2907 | I915_WRITE(GEN6_PMIMR, 0xffffffff); |
| 2908 | I915_WRITE(GEN6_PMIER, 0x0); |
| 2909 | POSTING_READ(GEN6_PMIER); |
| 2910 | } |
| 2911 | } |
| 2912 | |
| 2913 | /* drm_dma.h hooks |
| 2914 | */ |
| 2915 | static void ironlake_irq_preinstall(struct drm_device *dev) |
| 2916 | { |
| 2917 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2918 | |
| 2919 | I915_WRITE(HWSTAM, 0xeffe); |
| 2920 | |
| 2921 | I915_WRITE(DEIMR, 0xffffffff); |
| 2922 | I915_WRITE(DEIER, 0x0); |
| 2923 | POSTING_READ(DEIER); |
| 2924 | |
| 2925 | gen5_gt_irq_preinstall(dev); |
| 2926 | |
| 2927 | ibx_irq_preinstall(dev); |
| 2928 | } |
| 2929 | |
| 2930 | static void valleyview_irq_preinstall(struct drm_device *dev) |
| 2931 | { |
| 2932 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2933 | int pipe; |
| 2934 | |
| 2935 | /* VLV magic */ |
| 2936 | I915_WRITE(VLV_IMR, 0); |
| 2937 | I915_WRITE(RING_IMR(RENDER_RING_BASE), 0); |
| 2938 | I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0); |
| 2939 | I915_WRITE(RING_IMR(BLT_RING_BASE), 0); |
| 2940 | |
| 2941 | /* and GT */ |
| 2942 | I915_WRITE(GTIIR, I915_READ(GTIIR)); |
| 2943 | I915_WRITE(GTIIR, I915_READ(GTIIR)); |
| 2944 | |
| 2945 | gen5_gt_irq_preinstall(dev); |
| 2946 | |
| 2947 | I915_WRITE(DPINVGTT, 0xff); |
| 2948 | |
| 2949 | I915_WRITE(PORT_HOTPLUG_EN, 0); |
| 2950 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| 2951 | for_each_pipe(pipe) |
| 2952 | I915_WRITE(PIPESTAT(pipe), 0xffff); |
| 2953 | I915_WRITE(VLV_IIR, 0xffffffff); |
| 2954 | I915_WRITE(VLV_IMR, 0xffffffff); |
| 2955 | I915_WRITE(VLV_IER, 0x0); |
| 2956 | POSTING_READ(VLV_IER); |
| 2957 | } |
| 2958 | |
| 2959 | static void gen8_irq_preinstall(struct drm_device *dev) |
| 2960 | { |
| 2961 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 2962 | int pipe; |
| 2963 | |
| 2964 | I915_WRITE(GEN8_MASTER_IRQ, 0); |
| 2965 | POSTING_READ(GEN8_MASTER_IRQ); |
| 2966 | |
| 2967 | /* IIR can theoretically queue up two events. Be paranoid */ |
| 2968 | #define GEN8_IRQ_INIT_NDX(type, which) do { \ |
| 2969 | I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \ |
| 2970 | POSTING_READ(GEN8_##type##_IMR(which)); \ |
| 2971 | I915_WRITE(GEN8_##type##_IER(which), 0); \ |
| 2972 | I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \ |
| 2973 | POSTING_READ(GEN8_##type##_IIR(which)); \ |
| 2974 | I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \ |
| 2975 | } while (0) |
| 2976 | |
| 2977 | #define GEN8_IRQ_INIT(type) do { \ |
| 2978 | I915_WRITE(GEN8_##type##_IMR, 0xffffffff); \ |
| 2979 | POSTING_READ(GEN8_##type##_IMR); \ |
| 2980 | I915_WRITE(GEN8_##type##_IER, 0); \ |
| 2981 | I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \ |
| 2982 | POSTING_READ(GEN8_##type##_IIR); \ |
| 2983 | I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \ |
| 2984 | } while (0) |
| 2985 | |
| 2986 | GEN8_IRQ_INIT_NDX(GT, 0); |
| 2987 | GEN8_IRQ_INIT_NDX(GT, 1); |
| 2988 | GEN8_IRQ_INIT_NDX(GT, 2); |
| 2989 | GEN8_IRQ_INIT_NDX(GT, 3); |
| 2990 | |
| 2991 | for_each_pipe(pipe) { |
| 2992 | GEN8_IRQ_INIT_NDX(DE_PIPE, pipe); |
| 2993 | } |
| 2994 | |
| 2995 | GEN8_IRQ_INIT(DE_PORT); |
| 2996 | GEN8_IRQ_INIT(DE_MISC); |
| 2997 | GEN8_IRQ_INIT(PCU); |
| 2998 | #undef GEN8_IRQ_INIT |
| 2999 | #undef GEN8_IRQ_INIT_NDX |
| 3000 | |
| 3001 | POSTING_READ(GEN8_PCU_IIR); |
| 3002 | |
| 3003 | ibx_irq_preinstall(dev); |
| 3004 | } |
| 3005 | |
| 3006 | static void ibx_hpd_irq_setup(struct drm_device *dev) |
| 3007 | { |
| 3008 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3009 | struct drm_mode_config *mode_config = &dev->mode_config; |
| 3010 | struct intel_encoder *intel_encoder; |
| 3011 | u32 hotplug_irqs, hotplug, enabled_irqs = 0; |
| 3012 | |
| 3013 | if (HAS_PCH_IBX(dev)) { |
| 3014 | hotplug_irqs = SDE_HOTPLUG_MASK; |
| 3015 | list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head) |
| 3016 | if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED) |
| 3017 | enabled_irqs |= hpd_ibx[intel_encoder->hpd_pin]; |
| 3018 | } else { |
| 3019 | hotplug_irqs = SDE_HOTPLUG_MASK_CPT; |
| 3020 | list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head) |
| 3021 | if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED) |
| 3022 | enabled_irqs |= hpd_cpt[intel_encoder->hpd_pin]; |
| 3023 | } |
| 3024 | |
| 3025 | ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs); |
| 3026 | |
| 3027 | /* |
| 3028 | * Enable digital hotplug on the PCH, and configure the DP short pulse |
| 3029 | * duration to 2ms (which is the minimum in the Display Port spec) |
| 3030 | * |
| 3031 | * This register is the same on all known PCH chips. |
| 3032 | */ |
| 3033 | hotplug = I915_READ(PCH_PORT_HOTPLUG); |
| 3034 | hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK); |
| 3035 | hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms; |
| 3036 | hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms; |
| 3037 | hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms; |
| 3038 | I915_WRITE(PCH_PORT_HOTPLUG, hotplug); |
| 3039 | } |
| 3040 | |
| 3041 | static void ibx_irq_postinstall(struct drm_device *dev) |
| 3042 | { |
| 3043 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3044 | u32 mask; |
| 3045 | |
| 3046 | if (HAS_PCH_NOP(dev)) |
| 3047 | return; |
| 3048 | |
| 3049 | if (HAS_PCH_IBX(dev)) { |
| 3050 | mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON; |
| 3051 | } else { |
| 3052 | mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT; |
| 3053 | |
| 3054 | I915_WRITE(SERR_INT, I915_READ(SERR_INT)); |
| 3055 | } |
| 3056 | |
| 3057 | I915_WRITE(SDEIIR, I915_READ(SDEIIR)); |
| 3058 | I915_WRITE(SDEIMR, ~mask); |
| 3059 | } |
| 3060 | |
| 3061 | static void gen5_gt_irq_postinstall(struct drm_device *dev) |
| 3062 | { |
| 3063 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3064 | u32 pm_irqs, gt_irqs; |
| 3065 | |
| 3066 | pm_irqs = gt_irqs = 0; |
| 3067 | |
| 3068 | dev_priv->gt_irq_mask = ~0; |
| 3069 | if (HAS_L3_DPF(dev)) { |
| 3070 | /* L3 parity interrupt is always unmasked. */ |
| 3071 | dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev); |
| 3072 | gt_irqs |= GT_PARITY_ERROR(dev); |
| 3073 | } |
| 3074 | |
| 3075 | gt_irqs |= GT_RENDER_USER_INTERRUPT; |
| 3076 | if (IS_GEN5(dev)) { |
| 3077 | gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT | |
| 3078 | ILK_BSD_USER_INTERRUPT; |
| 3079 | } else { |
| 3080 | gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT; |
| 3081 | } |
| 3082 | |
| 3083 | I915_WRITE(GTIIR, I915_READ(GTIIR)); |
| 3084 | I915_WRITE(GTIMR, dev_priv->gt_irq_mask); |
| 3085 | I915_WRITE(GTIER, gt_irqs); |
| 3086 | POSTING_READ(GTIER); |
| 3087 | |
| 3088 | if (INTEL_INFO(dev)->gen >= 6) { |
| 3089 | pm_irqs |= dev_priv->pm_rps_events; |
| 3090 | |
| 3091 | if (HAS_VEBOX(dev)) |
| 3092 | pm_irqs |= PM_VEBOX_USER_INTERRUPT; |
| 3093 | |
| 3094 | dev_priv->pm_irq_mask = 0xffffffff; |
| 3095 | I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR)); |
| 3096 | I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask); |
| 3097 | I915_WRITE(GEN6_PMIER, pm_irqs); |
| 3098 | POSTING_READ(GEN6_PMIER); |
| 3099 | } |
| 3100 | } |
| 3101 | |
| 3102 | static int ironlake_irq_postinstall(struct drm_device *dev) |
| 3103 | { |
| 3104 | unsigned long irqflags; |
| 3105 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3106 | u32 display_mask, ; |
| 3107 | |
| 3108 | if (INTEL_INFO(dev)->gen >= 7) { |
| 3109 | display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | |
| 3110 | DE_PCH_EVENT_IVB | DE_PLANEC_FLIP_DONE_IVB | |
| 3111 | DE_PLANEB_FLIP_DONE_IVB | |
| 3112 | DE_PLANEA_FLIP_DONE_IVB | DE_AUX_CHANNEL_A_IVB); |
| 3113 | extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB | |
| 3114 | DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB); |
| 3115 | |
| 3116 | I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT)); |
| 3117 | } else { |
| 3118 | display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT | |
| 3119 | DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE | |
| 3120 | DE_AUX_CHANNEL_A | |
| 3121 | DE_PIPEB_CRC_DONE | DE_PIPEA_CRC_DONE | |
| 3122 | DE_POISON); |
| 3123 | extra_mask = DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT | |
| 3124 | DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN; |
| 3125 | } |
| 3126 | |
| 3127 | dev_priv->irq_mask = ~display_mask; |
| 3128 | |
| 3129 | /* should always can generate irq */ |
| 3130 | I915_WRITE(DEIIR, I915_READ(DEIIR)); |
| 3131 | I915_WRITE(DEIMR, dev_priv->irq_mask); |
| 3132 | I915_WRITE(DEIER, display_mask | extra_mask); |
| 3133 | POSTING_READ(DEIER); |
| 3134 | |
| 3135 | gen5_gt_irq_postinstall(dev); |
| 3136 | |
| 3137 | ibx_irq_postinstall(dev); |
| 3138 | |
| 3139 | if (IS_IRONLAKE_M(dev)) { |
| 3140 | /* Enable PCU event interrupts |
| 3141 | * |
| 3142 | * spinlocking not required here for correctness since interrupt |
| 3143 | * setup is guaranteed to run in single-threaded context. But we |
| 3144 | * need it to make the assert_spin_locked happy. */ |
| 3145 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 3146 | ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT); |
| 3147 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 3148 | } |
| 3149 | |
| 3150 | return 0; |
| 3151 | } |
| 3152 | |
| 3153 | static void valleyview_display_irqs_install(struct drm_i915_private *dev_priv) |
| 3154 | { |
| 3155 | u32 pipestat_mask; |
| 3156 | u32 iir_mask; |
| 3157 | |
| 3158 | pipestat_mask = PIPESTAT_INT_STATUS_MASK | |
| 3159 | PIPE_FIFO_UNDERRUN_STATUS; |
| 3160 | |
| 3161 | I915_WRITE(PIPESTAT(PIPE_A), pipestat_mask); |
| 3162 | I915_WRITE(PIPESTAT(PIPE_B), pipestat_mask); |
| 3163 | POSTING_READ(PIPESTAT(PIPE_A)); |
| 3164 | |
| 3165 | pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV | |
| 3166 | PIPE_CRC_DONE_INTERRUPT_STATUS; |
| 3167 | |
| 3168 | i915_enable_pipestat(dev_priv, PIPE_A, pipestat_mask | |
| 3169 | PIPE_GMBUS_INTERRUPT_STATUS); |
| 3170 | i915_enable_pipestat(dev_priv, PIPE_B, pipestat_mask); |
| 3171 | |
| 3172 | iir_mask = I915_DISPLAY_PORT_INTERRUPT | |
| 3173 | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| 3174 | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT; |
| 3175 | dev_priv->irq_mask &= ~iir_mask; |
| 3176 | |
| 3177 | I915_WRITE(VLV_IIR, iir_mask); |
| 3178 | I915_WRITE(VLV_IIR, iir_mask); |
| 3179 | I915_WRITE(VLV_IMR, dev_priv->irq_mask); |
| 3180 | I915_WRITE(VLV_IER, ~dev_priv->irq_mask); |
| 3181 | POSTING_READ(VLV_IER); |
| 3182 | } |
| 3183 | |
| 3184 | static void valleyview_display_irqs_uninstall(struct drm_i915_private *dev_priv) |
| 3185 | { |
| 3186 | u32 pipestat_mask; |
| 3187 | u32 iir_mask; |
| 3188 | |
| 3189 | iir_mask = I915_DISPLAY_PORT_INTERRUPT | |
| 3190 | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| 3191 | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT; |
| 3192 | |
| 3193 | dev_priv->irq_mask |= iir_mask; |
| 3194 | I915_WRITE(VLV_IER, ~dev_priv->irq_mask); |
| 3195 | I915_WRITE(VLV_IMR, dev_priv->irq_mask); |
| 3196 | I915_WRITE(VLV_IIR, iir_mask); |
| 3197 | I915_WRITE(VLV_IIR, iir_mask); |
| 3198 | POSTING_READ(VLV_IIR); |
| 3199 | |
| 3200 | pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV | |
| 3201 | PIPE_CRC_DONE_INTERRUPT_STATUS; |
| 3202 | |
| 3203 | i915_disable_pipestat(dev_priv, PIPE_A, pipestat_mask | |
| 3204 | PIPE_GMBUS_INTERRUPT_STATUS); |
| 3205 | i915_disable_pipestat(dev_priv, PIPE_B, pipestat_mask); |
| 3206 | |
| 3207 | pipestat_mask = PIPESTAT_INT_STATUS_MASK | |
| 3208 | PIPE_FIFO_UNDERRUN_STATUS; |
| 3209 | I915_WRITE(PIPESTAT(PIPE_A), pipestat_mask); |
| 3210 | I915_WRITE(PIPESTAT(PIPE_B), pipestat_mask); |
| 3211 | POSTING_READ(PIPESTAT(PIPE_A)); |
| 3212 | } |
| 3213 | |
| 3214 | void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv) |
| 3215 | { |
| 3216 | assert_spin_locked(&dev_priv->irq_lock); |
| 3217 | |
| 3218 | if (dev_priv->display_irqs_enabled) |
| 3219 | return; |
| 3220 | |
| 3221 | dev_priv->display_irqs_enabled = true; |
| 3222 | |
| 3223 | if (dev_priv->dev->irq_enabled) |
| 3224 | valleyview_display_irqs_install(dev_priv); |
| 3225 | } |
| 3226 | |
| 3227 | void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv) |
| 3228 | { |
| 3229 | assert_spin_locked(&dev_priv->irq_lock); |
| 3230 | |
| 3231 | if (!dev_priv->display_irqs_enabled) |
| 3232 | return; |
| 3233 | |
| 3234 | dev_priv->display_irqs_enabled = false; |
| 3235 | |
| 3236 | if (dev_priv->dev->irq_enabled) |
| 3237 | valleyview_display_irqs_uninstall(dev_priv); |
| 3238 | } |
| 3239 | |
| 3240 | static int valleyview_irq_postinstall(struct drm_device *dev) |
| 3241 | { |
| 3242 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3243 | unsigned long irqflags; |
| 3244 | |
| 3245 | dev_priv->irq_mask = ~0; |
| 3246 | |
| 3247 | I915_WRITE(PORT_HOTPLUG_EN, 0); |
| 3248 | POSTING_READ(PORT_HOTPLUG_EN); |
| 3249 | |
| 3250 | I915_WRITE(VLV_IMR, dev_priv->irq_mask); |
| 3251 | I915_WRITE(VLV_IER, ~dev_priv->irq_mask); |
| 3252 | I915_WRITE(VLV_IIR, 0xffffffff); |
| 3253 | POSTING_READ(VLV_IER); |
| 3254 | |
| 3255 | /* Interrupt setup is already guaranteed to be single-threaded, this is |
| 3256 | * just to make the assert_spin_locked check happy. */ |
| 3257 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 3258 | if (dev_priv->display_irqs_enabled) |
| 3259 | valleyview_display_irqs_install(dev_priv); |
| 3260 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 3261 | |
| 3262 | I915_WRITE(VLV_IIR, 0xffffffff); |
| 3263 | I915_WRITE(VLV_IIR, 0xffffffff); |
| 3264 | |
| 3265 | gen5_gt_irq_postinstall(dev); |
| 3266 | |
| 3267 | /* ack & enable invalid PTE error interrupts */ |
| 3268 | #if 0 /* FIXME: add support to irq handler for checking these bits */ |
| 3269 | I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK); |
| 3270 | I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK); |
| 3271 | #endif |
| 3272 | |
| 3273 | I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE); |
| 3274 | |
| 3275 | return 0; |
| 3276 | } |
| 3277 | |
| 3278 | static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv) |
| 3279 | { |
| 3280 | int i; |
| 3281 | |
| 3282 | /* These are interrupts we'll toggle with the ring mask register */ |
| 3283 | uint32_t gt_interrupts[] = { |
| 3284 | GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT | |
| 3285 | GT_RENDER_L3_PARITY_ERROR_INTERRUPT | |
| 3286 | GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT, |
| 3287 | GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT | |
| 3288 | GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT, |
| 3289 | 0, |
| 3290 | GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT |
| 3291 | }; |
| 3292 | |
| 3293 | for (i = 0; i < ARRAY_SIZE(gt_interrupts); i++) { |
| 3294 | u32 tmp = I915_READ(GEN8_GT_IIR(i)); |
| 3295 | if (tmp) |
| 3296 | DRM_ERROR("Interrupt (%d) should have been masked in pre-install 0x%08x\n" , |
| 3297 | i, tmp); |
| 3298 | I915_WRITE(GEN8_GT_IMR(i), ~gt_interrupts[i]); |
| 3299 | I915_WRITE(GEN8_GT_IER(i), gt_interrupts[i]); |
| 3300 | } |
| 3301 | POSTING_READ(GEN8_GT_IER(0)); |
| 3302 | } |
| 3303 | |
| 3304 | static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv) |
| 3305 | { |
| 3306 | struct drm_device *dev = dev_priv->dev; |
| 3307 | uint32_t de_pipe_masked = GEN8_PIPE_FLIP_DONE | |
| 3308 | GEN8_PIPE_CDCLK_CRC_DONE | |
| 3309 | GEN8_DE_PIPE_IRQ_FAULT_ERRORS; |
| 3310 | uint32_t de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK | |
| 3311 | GEN8_PIPE_FIFO_UNDERRUN; |
| 3312 | int pipe; |
| 3313 | dev_priv->de_irq_mask[PIPE_A] = ~de_pipe_masked; |
| 3314 | dev_priv->de_irq_mask[PIPE_B] = ~de_pipe_masked; |
| 3315 | dev_priv->de_irq_mask[PIPE_C] = ~de_pipe_masked; |
| 3316 | |
| 3317 | for_each_pipe(pipe) { |
| 3318 | u32 tmp = I915_READ(GEN8_DE_PIPE_IIR(pipe)); |
| 3319 | if (tmp) |
| 3320 | DRM_ERROR("Interrupt (%d) should have been masked in pre-install 0x%08x\n" , |
| 3321 | pipe, tmp); |
| 3322 | I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]); |
| 3323 | I915_WRITE(GEN8_DE_PIPE_IER(pipe), de_pipe_enables); |
| 3324 | } |
| 3325 | POSTING_READ(GEN8_DE_PIPE_ISR(0)); |
| 3326 | |
| 3327 | I915_WRITE(GEN8_DE_PORT_IMR, ~GEN8_AUX_CHANNEL_A); |
| 3328 | I915_WRITE(GEN8_DE_PORT_IER, GEN8_AUX_CHANNEL_A); |
| 3329 | POSTING_READ(GEN8_DE_PORT_IER); |
| 3330 | } |
| 3331 | |
| 3332 | static int gen8_irq_postinstall(struct drm_device *dev) |
| 3333 | { |
| 3334 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3335 | |
| 3336 | gen8_gt_irq_postinstall(dev_priv); |
| 3337 | gen8_de_irq_postinstall(dev_priv); |
| 3338 | |
| 3339 | ibx_irq_postinstall(dev); |
| 3340 | |
| 3341 | I915_WRITE(GEN8_MASTER_IRQ, DE_MASTER_IRQ_CONTROL); |
| 3342 | POSTING_READ(GEN8_MASTER_IRQ); |
| 3343 | |
| 3344 | return 0; |
| 3345 | } |
| 3346 | |
| 3347 | static void gen8_irq_uninstall(struct drm_device *dev) |
| 3348 | { |
| 3349 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3350 | int pipe; |
| 3351 | |
| 3352 | if (!dev_priv) |
| 3353 | return; |
| 3354 | |
| 3355 | I915_WRITE(GEN8_MASTER_IRQ, 0); |
| 3356 | |
| 3357 | #define GEN8_IRQ_FINI_NDX(type, which) do { \ |
| 3358 | I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \ |
| 3359 | I915_WRITE(GEN8_##type##_IER(which), 0); \ |
| 3360 | I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \ |
| 3361 | } while (0) |
| 3362 | |
| 3363 | #define GEN8_IRQ_FINI(type) do { \ |
| 3364 | I915_WRITE(GEN8_##type##_IMR, 0xffffffff); \ |
| 3365 | I915_WRITE(GEN8_##type##_IER, 0); \ |
| 3366 | I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \ |
| 3367 | } while (0) |
| 3368 | |
| 3369 | GEN8_IRQ_FINI_NDX(GT, 0); |
| 3370 | GEN8_IRQ_FINI_NDX(GT, 1); |
| 3371 | GEN8_IRQ_FINI_NDX(GT, 2); |
| 3372 | GEN8_IRQ_FINI_NDX(GT, 3); |
| 3373 | |
| 3374 | for_each_pipe(pipe) { |
| 3375 | GEN8_IRQ_FINI_NDX(DE_PIPE, pipe); |
| 3376 | } |
| 3377 | |
| 3378 | GEN8_IRQ_FINI(DE_PORT); |
| 3379 | GEN8_IRQ_FINI(DE_MISC); |
| 3380 | GEN8_IRQ_FINI(PCU); |
| 3381 | #undef GEN8_IRQ_FINI |
| 3382 | #undef GEN8_IRQ_FINI_NDX |
| 3383 | |
| 3384 | POSTING_READ(GEN8_PCU_IIR); |
| 3385 | } |
| 3386 | |
| 3387 | static void valleyview_irq_uninstall(struct drm_device *dev) |
| 3388 | { |
| 3389 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3390 | unsigned long irqflags; |
| 3391 | int pipe; |
| 3392 | |
| 3393 | if (!dev_priv) |
| 3394 | return; |
| 3395 | |
| 3396 | intel_hpd_irq_uninstall(dev_priv); |
| 3397 | |
| 3398 | for_each_pipe(pipe) |
| 3399 | I915_WRITE(PIPESTAT(pipe), 0xffff); |
| 3400 | |
| 3401 | I915_WRITE(HWSTAM, 0xffffffff); |
| 3402 | I915_WRITE(PORT_HOTPLUG_EN, 0); |
| 3403 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| 3404 | |
| 3405 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 3406 | if (dev_priv->display_irqs_enabled) |
| 3407 | valleyview_display_irqs_uninstall(dev_priv); |
| 3408 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 3409 | |
| 3410 | dev_priv->irq_mask = 0; |
| 3411 | |
| 3412 | I915_WRITE(VLV_IIR, 0xffffffff); |
| 3413 | I915_WRITE(VLV_IMR, 0xffffffff); |
| 3414 | I915_WRITE(VLV_IER, 0x0); |
| 3415 | POSTING_READ(VLV_IER); |
| 3416 | } |
| 3417 | |
| 3418 | static void ironlake_irq_uninstall(struct drm_device *dev) |
| 3419 | { |
| 3420 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3421 | |
| 3422 | if (!dev_priv) |
| 3423 | return; |
| 3424 | |
| 3425 | intel_hpd_irq_uninstall(dev_priv); |
| 3426 | |
| 3427 | I915_WRITE(HWSTAM, 0xffffffff); |
| 3428 | |
| 3429 | I915_WRITE(DEIMR, 0xffffffff); |
| 3430 | I915_WRITE(DEIER, 0x0); |
| 3431 | I915_WRITE(DEIIR, I915_READ(DEIIR)); |
| 3432 | if (IS_GEN7(dev)) |
| 3433 | I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT)); |
| 3434 | |
| 3435 | I915_WRITE(GTIMR, 0xffffffff); |
| 3436 | I915_WRITE(GTIER, 0x0); |
| 3437 | I915_WRITE(GTIIR, I915_READ(GTIIR)); |
| 3438 | |
| 3439 | if (HAS_PCH_NOP(dev)) |
| 3440 | return; |
| 3441 | |
| 3442 | I915_WRITE(SDEIMR, 0xffffffff); |
| 3443 | I915_WRITE(SDEIER, 0x0); |
| 3444 | I915_WRITE(SDEIIR, I915_READ(SDEIIR)); |
| 3445 | if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev)) |
| 3446 | I915_WRITE(SERR_INT, I915_READ(SERR_INT)); |
| 3447 | } |
| 3448 | |
| 3449 | static void i8xx_irq_preinstall(struct drm_device * dev) |
| 3450 | { |
| 3451 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3452 | int pipe; |
| 3453 | |
| 3454 | for_each_pipe(pipe) |
| 3455 | I915_WRITE(PIPESTAT(pipe), 0); |
| 3456 | I915_WRITE16(IMR, 0xffff); |
| 3457 | I915_WRITE16(IER, 0x0); |
| 3458 | POSTING_READ16(IER); |
| 3459 | } |
| 3460 | |
| 3461 | static int i8xx_irq_postinstall(struct drm_device *dev) |
| 3462 | { |
| 3463 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3464 | unsigned long irqflags; |
| 3465 | |
| 3466 | I915_WRITE16(EMR, |
| 3467 | ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH)); |
| 3468 | |
| 3469 | /* Unmask the interrupts that we always want on. */ |
| 3470 | dev_priv->irq_mask = |
| 3471 | ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| 3472 | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| 3473 | I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| 3474 | I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | |
| 3475 | I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); |
| 3476 | I915_WRITE16(IMR, dev_priv->irq_mask); |
| 3477 | |
| 3478 | I915_WRITE16(IER, |
| 3479 | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| 3480 | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| 3481 | I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT | |
| 3482 | I915_USER_INTERRUPT); |
| 3483 | POSTING_READ16(IER); |
| 3484 | |
| 3485 | /* Interrupt setup is already guaranteed to be single-threaded, this is |
| 3486 | * just to make the assert_spin_locked check happy. */ |
| 3487 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 3488 | i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); |
| 3489 | i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); |
| 3490 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 3491 | |
| 3492 | return 0; |
| 3493 | } |
| 3494 | |
| 3495 | /* |
| 3496 | * Returns true when a page flip has completed. |
| 3497 | */ |
| 3498 | static bool i8xx_handle_vblank(struct drm_device *dev, |
| 3499 | int plane, int pipe, u32 iir) |
| 3500 | { |
| 3501 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3502 | u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane); |
| 3503 | |
| 3504 | if (!drm_handle_vblank(dev, pipe)) |
| 3505 | return false; |
| 3506 | |
| 3507 | if ((iir & flip_pending) == 0) |
| 3508 | return false; |
| 3509 | |
| 3510 | intel_prepare_page_flip(dev, plane); |
| 3511 | |
| 3512 | /* We detect FlipDone by looking for the change in PendingFlip from '1' |
| 3513 | * to '0' on the following vblank, i.e. IIR has the Pendingflip |
| 3514 | * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence |
| 3515 | * the flip is completed (no longer pending). Since this doesn't raise |
| 3516 | * an interrupt per se, we watch for the change at vblank. |
| 3517 | */ |
| 3518 | if (I915_READ16(ISR) & flip_pending) |
| 3519 | return false; |
| 3520 | |
| 3521 | intel_finish_page_flip(dev, pipe); |
| 3522 | |
| 3523 | return true; |
| 3524 | } |
| 3525 | |
| 3526 | static irqreturn_t i8xx_irq_handler(DRM_IRQ_ARGS) |
| 3527 | { |
| 3528 | struct drm_device *dev = (struct drm_device *) arg; |
| 3529 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3530 | u16 iir, new_iir; |
| 3531 | u32 pipe_stats[2]; |
| 3532 | unsigned long irqflags; |
| 3533 | int pipe; |
| 3534 | u16 flip_mask = |
| 3535 | I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| 3536 | I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT; |
| 3537 | |
| 3538 | iir = I915_READ16(IIR); |
| 3539 | if (iir == 0) |
| 3540 | return IRQ_NONE; |
| 3541 | |
| 3542 | while (iir & ~flip_mask) { |
| 3543 | /* Can't rely on pipestat interrupt bit in iir as it might |
| 3544 | * have been cleared after the pipestat interrupt was received. |
| 3545 | * It doesn't set the bit in iir again, but it still produces |
| 3546 | * interrupts (for non-MSI). |
| 3547 | */ |
| 3548 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 3549 | if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) |
| 3550 | i915_handle_error(dev, false, |
| 3551 | "Command parser error, iir 0x%08x" , |
| 3552 | iir); |
| 3553 | |
| 3554 | for_each_pipe(pipe) { |
| 3555 | int reg = PIPESTAT(pipe); |
| 3556 | pipe_stats[pipe] = I915_READ(reg); |
| 3557 | |
| 3558 | /* |
| 3559 | * Clear the PIPE*STAT regs before the IIR |
| 3560 | */ |
| 3561 | if (pipe_stats[pipe] & 0x8000ffff) |
| 3562 | I915_WRITE(reg, pipe_stats[pipe]); |
| 3563 | } |
| 3564 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 3565 | |
| 3566 | I915_WRITE16(IIR, iir & ~flip_mask); |
| 3567 | new_iir = I915_READ16(IIR); /* Flush posted writes */ |
| 3568 | |
| 3569 | i915_update_dri1_breadcrumb(dev); |
| 3570 | |
| 3571 | if (iir & I915_USER_INTERRUPT) |
| 3572 | notify_ring(dev, &dev_priv->ring[RCS]); |
| 3573 | |
| 3574 | for_each_pipe(pipe) { |
| 3575 | int plane = pipe; |
| 3576 | if (HAS_FBC(dev)) |
| 3577 | plane = !plane; |
| 3578 | |
| 3579 | if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS && |
| 3580 | i8xx_handle_vblank(dev, plane, pipe, iir)) |
| 3581 | flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane); |
| 3582 | |
| 3583 | if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) |
| 3584 | i9xx_pipe_crc_irq_handler(dev, pipe); |
| 3585 | |
| 3586 | if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS && |
| 3587 | intel_set_cpu_fifo_underrun_reporting(dev, pipe, false)) |
| 3588 | DRM_ERROR("pipe %c underrun\n" , pipe_name(pipe)); |
| 3589 | } |
| 3590 | |
| 3591 | iir = new_iir; |
| 3592 | } |
| 3593 | |
| 3594 | return IRQ_HANDLED; |
| 3595 | } |
| 3596 | |
| 3597 | static void i8xx_irq_uninstall(struct drm_device * dev) |
| 3598 | { |
| 3599 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3600 | int pipe; |
| 3601 | |
| 3602 | for_each_pipe(pipe) { |
| 3603 | /* Clear enable bits; then clear status bits */ |
| 3604 | I915_WRITE(PIPESTAT(pipe), 0); |
| 3605 | I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe))); |
| 3606 | } |
| 3607 | I915_WRITE16(IMR, 0xffff); |
| 3608 | I915_WRITE16(IER, 0x0); |
| 3609 | I915_WRITE16(IIR, I915_READ16(IIR)); |
| 3610 | } |
| 3611 | |
| 3612 | static void i915_irq_preinstall(struct drm_device * dev) |
| 3613 | { |
| 3614 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3615 | int pipe; |
| 3616 | |
| 3617 | if (I915_HAS_HOTPLUG(dev)) { |
| 3618 | I915_WRITE(PORT_HOTPLUG_EN, 0); |
| 3619 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| 3620 | } |
| 3621 | |
| 3622 | I915_WRITE16(HWSTAM, 0xeffe); |
| 3623 | for_each_pipe(pipe) |
| 3624 | I915_WRITE(PIPESTAT(pipe), 0); |
| 3625 | I915_WRITE(IMR, 0xffffffff); |
| 3626 | I915_WRITE(IER, 0x0); |
| 3627 | POSTING_READ(IER); |
| 3628 | } |
| 3629 | |
| 3630 | static int i915_irq_postinstall(struct drm_device *dev) |
| 3631 | { |
| 3632 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3633 | u32 enable_mask; |
| 3634 | unsigned long irqflags; |
| 3635 | |
| 3636 | I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH)); |
| 3637 | |
| 3638 | /* Unmask the interrupts that we always want on. */ |
| 3639 | dev_priv->irq_mask = |
| 3640 | ~(I915_ASLE_INTERRUPT | |
| 3641 | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| 3642 | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| 3643 | I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| 3644 | I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | |
| 3645 | I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); |
| 3646 | |
| 3647 | enable_mask = |
| 3648 | I915_ASLE_INTERRUPT | |
| 3649 | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| 3650 | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| 3651 | I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT | |
| 3652 | I915_USER_INTERRUPT; |
| 3653 | |
| 3654 | if (I915_HAS_HOTPLUG(dev)) { |
| 3655 | I915_WRITE(PORT_HOTPLUG_EN, 0); |
| 3656 | POSTING_READ(PORT_HOTPLUG_EN); |
| 3657 | |
| 3658 | /* Enable in IER... */ |
| 3659 | enable_mask |= I915_DISPLAY_PORT_INTERRUPT; |
| 3660 | /* and unmask in IMR */ |
| 3661 | dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT; |
| 3662 | } |
| 3663 | |
| 3664 | I915_WRITE(IMR, dev_priv->irq_mask); |
| 3665 | I915_WRITE(IER, enable_mask); |
| 3666 | POSTING_READ(IER); |
| 3667 | |
| 3668 | i915_enable_asle_pipestat(dev); |
| 3669 | |
| 3670 | /* Interrupt setup is already guaranteed to be single-threaded, this is |
| 3671 | * just to make the assert_spin_locked check happy. */ |
| 3672 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 3673 | i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); |
| 3674 | i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); |
| 3675 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 3676 | |
| 3677 | return 0; |
| 3678 | } |
| 3679 | |
| 3680 | /* |
| 3681 | * Returns true when a page flip has completed. |
| 3682 | */ |
| 3683 | static bool i915_handle_vblank(struct drm_device *dev, |
| 3684 | int plane, int pipe, u32 iir) |
| 3685 | { |
| 3686 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3687 | u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane); |
| 3688 | |
| 3689 | if (!drm_handle_vblank(dev, pipe)) |
| 3690 | return false; |
| 3691 | |
| 3692 | if ((iir & flip_pending) == 0) |
| 3693 | return false; |
| 3694 | |
| 3695 | intel_prepare_page_flip(dev, plane); |
| 3696 | |
| 3697 | /* We detect FlipDone by looking for the change in PendingFlip from '1' |
| 3698 | * to '0' on the following vblank, i.e. IIR has the Pendingflip |
| 3699 | * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence |
| 3700 | * the flip is completed (no longer pending). Since this doesn't raise |
| 3701 | * an interrupt per se, we watch for the change at vblank. |
| 3702 | */ |
| 3703 | if (I915_READ(ISR) & flip_pending) |
| 3704 | return false; |
| 3705 | |
| 3706 | intel_finish_page_flip(dev, pipe); |
| 3707 | |
| 3708 | return true; |
| 3709 | } |
| 3710 | |
| 3711 | static irqreturn_t i915_irq_handler(DRM_IRQ_ARGS) |
| 3712 | { |
| 3713 | struct drm_device *dev = (struct drm_device *) arg; |
| 3714 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3715 | u32 iir, new_iir, pipe_stats[I915_MAX_PIPES]; |
| 3716 | unsigned long irqflags; |
| 3717 | u32 flip_mask = |
| 3718 | I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| 3719 | I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT; |
| 3720 | int pipe, ret = IRQ_NONE; |
| 3721 | |
| 3722 | iir = I915_READ(IIR); |
| 3723 | do { |
| 3724 | bool irq_received = (iir & ~flip_mask) != 0; |
| 3725 | bool blc_event = false; |
| 3726 | |
| 3727 | /* Can't rely on pipestat interrupt bit in iir as it might |
| 3728 | * have been cleared after the pipestat interrupt was received. |
| 3729 | * It doesn't set the bit in iir again, but it still produces |
| 3730 | * interrupts (for non-MSI). |
| 3731 | */ |
| 3732 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 3733 | if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) |
| 3734 | i915_handle_error(dev, false, |
| 3735 | "Command parser error, iir 0x%08x" , |
| 3736 | iir); |
| 3737 | |
| 3738 | for_each_pipe(pipe) { |
| 3739 | int reg = PIPESTAT(pipe); |
| 3740 | pipe_stats[pipe] = I915_READ(reg); |
| 3741 | |
| 3742 | /* Clear the PIPE*STAT regs before the IIR */ |
| 3743 | if (pipe_stats[pipe] & 0x8000ffff) { |
| 3744 | I915_WRITE(reg, pipe_stats[pipe]); |
| 3745 | irq_received = true; |
| 3746 | } |
| 3747 | } |
| 3748 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 3749 | |
| 3750 | if (!irq_received) |
| 3751 | break; |
| 3752 | |
| 3753 | /* Consume port. Then clear IIR or we'll miss events */ |
| 3754 | if ((I915_HAS_HOTPLUG(dev)) && |
| 3755 | (iir & I915_DISPLAY_PORT_INTERRUPT)) { |
| 3756 | u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); |
| 3757 | u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915; |
| 3758 | |
| 3759 | intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915); |
| 3760 | |
| 3761 | I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); |
| 3762 | POSTING_READ(PORT_HOTPLUG_STAT); |
| 3763 | } |
| 3764 | |
| 3765 | I915_WRITE(IIR, iir & ~flip_mask); |
| 3766 | new_iir = I915_READ(IIR); /* Flush posted writes */ |
| 3767 | |
| 3768 | if (iir & I915_USER_INTERRUPT) |
| 3769 | notify_ring(dev, &dev_priv->ring[RCS]); |
| 3770 | |
| 3771 | for_each_pipe(pipe) { |
| 3772 | int plane = pipe; |
| 3773 | if (HAS_FBC(dev)) |
| 3774 | plane = !plane; |
| 3775 | |
| 3776 | if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS && |
| 3777 | i915_handle_vblank(dev, plane, pipe, iir)) |
| 3778 | flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane); |
| 3779 | |
| 3780 | if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS) |
| 3781 | blc_event = true; |
| 3782 | |
| 3783 | if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) |
| 3784 | i9xx_pipe_crc_irq_handler(dev, pipe); |
| 3785 | |
| 3786 | if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS && |
| 3787 | intel_set_cpu_fifo_underrun_reporting(dev, pipe, false)) |
| 3788 | DRM_ERROR("pipe %c underrun\n" , pipe_name(pipe)); |
| 3789 | } |
| 3790 | |
| 3791 | if (blc_event || (iir & I915_ASLE_INTERRUPT)) |
| 3792 | intel_opregion_asle_intr(dev); |
| 3793 | |
| 3794 | /* With MSI, interrupts are only generated when iir |
| 3795 | * transitions from zero to nonzero. If another bit got |
| 3796 | * set while we were handling the existing iir bits, then |
| 3797 | * we would never get another interrupt. |
| 3798 | * |
| 3799 | * This is fine on non-MSI as well, as if we hit this path |
| 3800 | * we avoid exiting the interrupt handler only to generate |
| 3801 | * another one. |
| 3802 | * |
| 3803 | * Note that for MSI this could cause a stray interrupt report |
| 3804 | * if an interrupt landed in the time between writing IIR and |
| 3805 | * the posting read. This should be rare enough to never |
| 3806 | * trigger the 99% of 100,000 interrupts test for disabling |
| 3807 | * stray interrupts. |
| 3808 | */ |
| 3809 | ret = IRQ_HANDLED; |
| 3810 | iir = new_iir; |
| 3811 | } while (iir & ~flip_mask); |
| 3812 | |
| 3813 | i915_update_dri1_breadcrumb(dev); |
| 3814 | |
| 3815 | return ret; |
| 3816 | } |
| 3817 | |
| 3818 | static void i915_irq_uninstall(struct drm_device * dev) |
| 3819 | { |
| 3820 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3821 | int pipe; |
| 3822 | |
| 3823 | intel_hpd_irq_uninstall(dev_priv); |
| 3824 | |
| 3825 | if (I915_HAS_HOTPLUG(dev)) { |
| 3826 | I915_WRITE(PORT_HOTPLUG_EN, 0); |
| 3827 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| 3828 | } |
| 3829 | |
| 3830 | I915_WRITE16(HWSTAM, 0xffff); |
| 3831 | for_each_pipe(pipe) { |
| 3832 | /* Clear enable bits; then clear status bits */ |
| 3833 | I915_WRITE(PIPESTAT(pipe), 0); |
| 3834 | I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe))); |
| 3835 | } |
| 3836 | I915_WRITE(IMR, 0xffffffff); |
| 3837 | I915_WRITE(IER, 0x0); |
| 3838 | |
| 3839 | I915_WRITE(IIR, I915_READ(IIR)); |
| 3840 | } |
| 3841 | |
| 3842 | static void i965_irq_preinstall(struct drm_device * dev) |
| 3843 | { |
| 3844 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3845 | int pipe; |
| 3846 | |
| 3847 | I915_WRITE(PORT_HOTPLUG_EN, 0); |
| 3848 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| 3849 | |
| 3850 | I915_WRITE(HWSTAM, 0xeffe); |
| 3851 | for_each_pipe(pipe) |
| 3852 | I915_WRITE(PIPESTAT(pipe), 0); |
| 3853 | I915_WRITE(IMR, 0xffffffff); |
| 3854 | I915_WRITE(IER, 0x0); |
| 3855 | POSTING_READ(IER); |
| 3856 | } |
| 3857 | |
| 3858 | static int i965_irq_postinstall(struct drm_device *dev) |
| 3859 | { |
| 3860 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3861 | u32 enable_mask; |
| 3862 | u32 error_mask; |
| 3863 | unsigned long irqflags; |
| 3864 | |
| 3865 | /* Unmask the interrupts that we always want on. */ |
| 3866 | dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT | |
| 3867 | I915_DISPLAY_PORT_INTERRUPT | |
| 3868 | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| 3869 | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| 3870 | I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| 3871 | I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | |
| 3872 | I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); |
| 3873 | |
| 3874 | enable_mask = ~dev_priv->irq_mask; |
| 3875 | enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| 3876 | I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT); |
| 3877 | enable_mask |= I915_USER_INTERRUPT; |
| 3878 | |
| 3879 | if (IS_G4X(dev)) |
| 3880 | enable_mask |= I915_BSD_USER_INTERRUPT; |
| 3881 | |
| 3882 | /* Interrupt setup is already guaranteed to be single-threaded, this is |
| 3883 | * just to make the assert_spin_locked check happy. */ |
| 3884 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 3885 | i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS); |
| 3886 | i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); |
| 3887 | i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); |
| 3888 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 3889 | |
| 3890 | /* |
| 3891 | * Enable some error detection, note the instruction error mask |
| 3892 | * bit is reserved, so we leave it masked. |
| 3893 | */ |
| 3894 | if (IS_G4X(dev)) { |
| 3895 | error_mask = ~(GM45_ERROR_PAGE_TABLE | |
| 3896 | GM45_ERROR_MEM_PRIV | |
| 3897 | GM45_ERROR_CP_PRIV | |
| 3898 | I915_ERROR_MEMORY_REFRESH); |
| 3899 | } else { |
| 3900 | error_mask = ~(I915_ERROR_PAGE_TABLE | |
| 3901 | I915_ERROR_MEMORY_REFRESH); |
| 3902 | } |
| 3903 | I915_WRITE(EMR, error_mask); |
| 3904 | |
| 3905 | I915_WRITE(IMR, dev_priv->irq_mask); |
| 3906 | I915_WRITE(IER, enable_mask); |
| 3907 | POSTING_READ(IER); |
| 3908 | |
| 3909 | I915_WRITE(PORT_HOTPLUG_EN, 0); |
| 3910 | POSTING_READ(PORT_HOTPLUG_EN); |
| 3911 | |
| 3912 | i915_enable_asle_pipestat(dev); |
| 3913 | |
| 3914 | return 0; |
| 3915 | } |
| 3916 | |
| 3917 | static void i915_hpd_irq_setup(struct drm_device *dev) |
| 3918 | { |
| 3919 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3920 | struct drm_mode_config *mode_config = &dev->mode_config; |
| 3921 | struct intel_encoder *intel_encoder; |
| 3922 | u32 hotplug_en; |
| 3923 | |
| 3924 | assert_spin_locked(&dev_priv->irq_lock); |
| 3925 | |
| 3926 | if (I915_HAS_HOTPLUG(dev)) { |
| 3927 | hotplug_en = I915_READ(PORT_HOTPLUG_EN); |
| 3928 | hotplug_en &= ~HOTPLUG_INT_EN_MASK; |
| 3929 | /* Note HDMI and DP share hotplug bits */ |
| 3930 | /* enable bits are the same for all generations */ |
| 3931 | list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head) |
| 3932 | if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED) |
| 3933 | hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin]; |
| 3934 | /* Programming the CRT detection parameters tends |
| 3935 | to generate a spurious hotplug event about three |
| 3936 | seconds later. So just do it once. |
| 3937 | */ |
| 3938 | if (IS_G4X(dev)) |
| 3939 | hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64; |
| 3940 | hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK; |
| 3941 | hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50; |
| 3942 | |
| 3943 | /* Ignore TV since it's buggy */ |
| 3944 | I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); |
| 3945 | } |
| 3946 | } |
| 3947 | |
| 3948 | static irqreturn_t i965_irq_handler(DRM_IRQ_ARGS) |
| 3949 | { |
| 3950 | struct drm_device *dev = (struct drm_device *) arg; |
| 3951 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 3952 | u32 iir, new_iir; |
| 3953 | u32 pipe_stats[I915_MAX_PIPES]; |
| 3954 | unsigned long irqflags; |
| 3955 | int ret = IRQ_NONE, pipe; |
| 3956 | u32 flip_mask = |
| 3957 | I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| 3958 | I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT; |
| 3959 | |
| 3960 | iir = I915_READ(IIR); |
| 3961 | |
| 3962 | for (;;) { |
| 3963 | bool irq_received = (iir & ~flip_mask) != 0; |
| 3964 | bool blc_event = false; |
| 3965 | |
| 3966 | /* Can't rely on pipestat interrupt bit in iir as it might |
| 3967 | * have been cleared after the pipestat interrupt was received. |
| 3968 | * It doesn't set the bit in iir again, but it still produces |
| 3969 | * interrupts (for non-MSI). |
| 3970 | */ |
| 3971 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 3972 | if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) |
| 3973 | i915_handle_error(dev, false, |
| 3974 | "Command parser error, iir 0x%08x" , |
| 3975 | iir); |
| 3976 | |
| 3977 | for_each_pipe(pipe) { |
| 3978 | int reg = PIPESTAT(pipe); |
| 3979 | pipe_stats[pipe] = I915_READ(reg); |
| 3980 | |
| 3981 | /* |
| 3982 | * Clear the PIPE*STAT regs before the IIR |
| 3983 | */ |
| 3984 | if (pipe_stats[pipe] & 0x8000ffff) { |
| 3985 | I915_WRITE(reg, pipe_stats[pipe]); |
| 3986 | irq_received = true; |
| 3987 | } |
| 3988 | } |
| 3989 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 3990 | |
| 3991 | if (!irq_received) |
| 3992 | break; |
| 3993 | |
| 3994 | ret = IRQ_HANDLED; |
| 3995 | |
| 3996 | /* Consume port. Then clear IIR or we'll miss events */ |
| 3997 | if (iir & I915_DISPLAY_PORT_INTERRUPT) { |
| 3998 | u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); |
| 3999 | u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ? |
| 4000 | HOTPLUG_INT_STATUS_G4X : |
| 4001 | HOTPLUG_INT_STATUS_I915); |
| 4002 | |
| 4003 | intel_hpd_irq_handler(dev, hotplug_trigger, |
| 4004 | IS_G4X(dev) ? hpd_status_g4x : hpd_status_i915); |
| 4005 | |
| 4006 | if (IS_G4X(dev) && |
| 4007 | (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)) |
| 4008 | dp_aux_irq_handler(dev); |
| 4009 | |
| 4010 | I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); |
| 4011 | I915_READ(PORT_HOTPLUG_STAT); |
| 4012 | } |
| 4013 | |
| 4014 | I915_WRITE(IIR, iir & ~flip_mask); |
| 4015 | new_iir = I915_READ(IIR); /* Flush posted writes */ |
| 4016 | |
| 4017 | if (iir & I915_USER_INTERRUPT) |
| 4018 | notify_ring(dev, &dev_priv->ring[RCS]); |
| 4019 | if (iir & I915_BSD_USER_INTERRUPT) |
| 4020 | notify_ring(dev, &dev_priv->ring[VCS]); |
| 4021 | |
| 4022 | for_each_pipe(pipe) { |
| 4023 | if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS && |
| 4024 | i915_handle_vblank(dev, pipe, pipe, iir)) |
| 4025 | flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe); |
| 4026 | |
| 4027 | if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS) |
| 4028 | blc_event = true; |
| 4029 | |
| 4030 | if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) |
| 4031 | i9xx_pipe_crc_irq_handler(dev, pipe); |
| 4032 | |
| 4033 | if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS && |
| 4034 | intel_set_cpu_fifo_underrun_reporting(dev, pipe, false)) |
| 4035 | DRM_ERROR("pipe %c underrun\n" , pipe_name(pipe)); |
| 4036 | } |
| 4037 | |
| 4038 | if (blc_event || (iir & I915_ASLE_INTERRUPT)) |
| 4039 | intel_opregion_asle_intr(dev); |
| 4040 | |
| 4041 | if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS) |
| 4042 | gmbus_irq_handler(dev); |
| 4043 | |
| 4044 | /* With MSI, interrupts are only generated when iir |
| 4045 | * transitions from zero to nonzero. If another bit got |
| 4046 | * set while we were handling the existing iir bits, then |
| 4047 | * we would never get another interrupt. |
| 4048 | * |
| 4049 | * This is fine on non-MSI as well, as if we hit this path |
| 4050 | * we avoid exiting the interrupt handler only to generate |
| 4051 | * another one. |
| 4052 | * |
| 4053 | * Note that for MSI this could cause a stray interrupt report |
| 4054 | * if an interrupt landed in the time between writing IIR and |
| 4055 | * the posting read. This should be rare enough to never |
| 4056 | * trigger the 99% of 100,000 interrupts test for disabling |
| 4057 | * stray interrupts. |
| 4058 | */ |
| 4059 | iir = new_iir; |
| 4060 | } |
| 4061 | |
| 4062 | i915_update_dri1_breadcrumb(dev); |
| 4063 | |
| 4064 | return ret; |
| 4065 | } |
| 4066 | |
| 4067 | static void i965_irq_uninstall(struct drm_device * dev) |
| 4068 | { |
| 4069 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 4070 | int pipe; |
| 4071 | |
| 4072 | if (!dev_priv) |
| 4073 | return; |
| 4074 | |
| 4075 | intel_hpd_irq_uninstall(dev_priv); |
| 4076 | |
| 4077 | I915_WRITE(PORT_HOTPLUG_EN, 0); |
| 4078 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| 4079 | |
| 4080 | I915_WRITE(HWSTAM, 0xffffffff); |
| 4081 | for_each_pipe(pipe) |
| 4082 | I915_WRITE(PIPESTAT(pipe), 0); |
| 4083 | I915_WRITE(IMR, 0xffffffff); |
| 4084 | I915_WRITE(IER, 0x0); |
| 4085 | |
| 4086 | for_each_pipe(pipe) |
| 4087 | I915_WRITE(PIPESTAT(pipe), |
| 4088 | I915_READ(PIPESTAT(pipe)) & 0x8000ffff); |
| 4089 | I915_WRITE(IIR, I915_READ(IIR)); |
| 4090 | } |
| 4091 | |
| 4092 | static void intel_hpd_irq_reenable(unsigned long data) |
| 4093 | { |
| 4094 | struct drm_i915_private *dev_priv = (struct drm_i915_private *)data; |
| 4095 | struct drm_device *dev = dev_priv->dev; |
| 4096 | struct drm_mode_config *mode_config = &dev->mode_config; |
| 4097 | unsigned long irqflags; |
| 4098 | int i; |
| 4099 | |
| 4100 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 4101 | for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) { |
| 4102 | struct drm_connector *connector; |
| 4103 | |
| 4104 | if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED) |
| 4105 | continue; |
| 4106 | |
| 4107 | dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED; |
| 4108 | |
| 4109 | list_for_each_entry(connector, &mode_config->connector_list, head) { |
| 4110 | struct intel_connector *intel_connector = to_intel_connector(connector); |
| 4111 | |
| 4112 | if (intel_connector->encoder->hpd_pin == i) { |
| 4113 | if (connector->polled != intel_connector->polled) |
| 4114 | DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n" , |
| 4115 | drm_get_connector_name(connector)); |
| 4116 | connector->polled = intel_connector->polled; |
| 4117 | if (!connector->polled) |
| 4118 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
| 4119 | } |
| 4120 | } |
| 4121 | } |
| 4122 | if (dev_priv->display.hpd_irq_setup) |
| 4123 | dev_priv->display.hpd_irq_setup(dev); |
| 4124 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 4125 | } |
| 4126 | |
| 4127 | void intel_irq_init(struct drm_device *dev) |
| 4128 | { |
| 4129 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 4130 | |
| 4131 | INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func); |
| 4132 | INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func); |
| 4133 | INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work); |
| 4134 | INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work); |
| 4135 | |
| 4136 | /* Let's track the enabled rps events */ |
| 4137 | dev_priv->pm_rps_events = GEN6_PM_RPS_EVENTS; |
| 4138 | |
| 4139 | setup_timer(&dev_priv->gpu_error.hangcheck_timer, |
| 4140 | i915_hangcheck_elapsed, |
| 4141 | (unsigned long) dev); |
| 4142 | setup_timer(&dev_priv->hotplug_reenable_timer, intel_hpd_irq_reenable, |
| 4143 | (unsigned long) dev_priv); |
| 4144 | |
| 4145 | pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE); |
| 4146 | |
| 4147 | if (IS_GEN2(dev)) { |
| 4148 | dev->max_vblank_count = 0; |
| 4149 | dev->driver->get_vblank_counter = i8xx_get_vblank_counter; |
| 4150 | } else if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { |
| 4151 | dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */ |
| 4152 | dev->driver->get_vblank_counter = gm45_get_vblank_counter; |
| 4153 | } else { |
| 4154 | dev->driver->get_vblank_counter = i915_get_vblank_counter; |
| 4155 | dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */ |
| 4156 | } |
| 4157 | |
| 4158 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 4159 | dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp; |
| 4160 | dev->driver->get_scanout_position = i915_get_crtc_scanoutpos; |
| 4161 | } |
| 4162 | |
| 4163 | if (IS_VALLEYVIEW(dev)) { |
| 4164 | dev->driver->irq_handler = valleyview_irq_handler; |
| 4165 | dev->driver->irq_preinstall = valleyview_irq_preinstall; |
| 4166 | dev->driver->irq_postinstall = valleyview_irq_postinstall; |
| 4167 | dev->driver->irq_uninstall = valleyview_irq_uninstall; |
| 4168 | dev->driver->enable_vblank = valleyview_enable_vblank; |
| 4169 | dev->driver->disable_vblank = valleyview_disable_vblank; |
| 4170 | dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup; |
| 4171 | } else if (IS_GEN8(dev)) { |
| 4172 | dev->driver->irq_handler = gen8_irq_handler; |
| 4173 | dev->driver->irq_preinstall = gen8_irq_preinstall; |
| 4174 | dev->driver->irq_postinstall = gen8_irq_postinstall; |
| 4175 | dev->driver->irq_uninstall = gen8_irq_uninstall; |
| 4176 | dev->driver->enable_vblank = gen8_enable_vblank; |
| 4177 | dev->driver->disable_vblank = gen8_disable_vblank; |
| 4178 | dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup; |
| 4179 | } else if (HAS_PCH_SPLIT(dev)) { |
| 4180 | dev->driver->irq_handler = ironlake_irq_handler; |
| 4181 | dev->driver->irq_preinstall = ironlake_irq_preinstall; |
| 4182 | dev->driver->irq_postinstall = ironlake_irq_postinstall; |
| 4183 | dev->driver->irq_uninstall = ironlake_irq_uninstall; |
| 4184 | dev->driver->enable_vblank = ironlake_enable_vblank; |
| 4185 | dev->driver->disable_vblank = ironlake_disable_vblank; |
| 4186 | dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup; |
| 4187 | } else { |
| 4188 | if (INTEL_INFO(dev)->gen == 2) { |
| 4189 | dev->driver->irq_preinstall = i8xx_irq_preinstall; |
| 4190 | dev->driver->irq_postinstall = i8xx_irq_postinstall; |
| 4191 | dev->driver->irq_handler = i8xx_irq_handler; |
| 4192 | dev->driver->irq_uninstall = i8xx_irq_uninstall; |
| 4193 | } else if (INTEL_INFO(dev)->gen == 3) { |
| 4194 | dev->driver->irq_preinstall = i915_irq_preinstall; |
| 4195 | dev->driver->irq_postinstall = i915_irq_postinstall; |
| 4196 | dev->driver->irq_uninstall = i915_irq_uninstall; |
| 4197 | dev->driver->irq_handler = i915_irq_handler; |
| 4198 | dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup; |
| 4199 | } else { |
| 4200 | dev->driver->irq_preinstall = i965_irq_preinstall; |
| 4201 | dev->driver->irq_postinstall = i965_irq_postinstall; |
| 4202 | dev->driver->irq_uninstall = i965_irq_uninstall; |
| 4203 | dev->driver->irq_handler = i965_irq_handler; |
| 4204 | dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup; |
| 4205 | } |
| 4206 | dev->driver->enable_vblank = i915_enable_vblank; |
| 4207 | dev->driver->disable_vblank = i915_disable_vblank; |
| 4208 | } |
| 4209 | } |
| 4210 | |
| 4211 | void intel_hpd_init(struct drm_device *dev) |
| 4212 | { |
| 4213 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 4214 | struct drm_mode_config *mode_config = &dev->mode_config; |
| 4215 | struct drm_connector *connector; |
| 4216 | unsigned long irqflags; |
| 4217 | int i; |
| 4218 | |
| 4219 | for (i = 1; i < HPD_NUM_PINS; i++) { |
| 4220 | dev_priv->hpd_stats[i].hpd_cnt = 0; |
| 4221 | dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED; |
| 4222 | } |
| 4223 | list_for_each_entry(connector, &mode_config->connector_list, head) { |
| 4224 | struct intel_connector *intel_connector = to_intel_connector(connector); |
| 4225 | connector->polled = intel_connector->polled; |
| 4226 | if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE) |
| 4227 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
| 4228 | } |
| 4229 | |
| 4230 | /* Interrupt setup is already guaranteed to be single-threaded, this is |
| 4231 | * just to make the assert_spin_locked checks happy. */ |
| 4232 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 4233 | if (dev_priv->display.hpd_irq_setup) |
| 4234 | dev_priv->display.hpd_irq_setup(dev); |
| 4235 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 4236 | } |
| 4237 | |
| 4238 | /* Disable interrupts so we can allow runtime PM. */ |
| 4239 | void hsw_runtime_pm_disable_interrupts(struct drm_device *dev) |
| 4240 | { |
| 4241 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 4242 | unsigned long irqflags; |
| 4243 | |
| 4244 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 4245 | |
| 4246 | dev_priv->pm.regsave.deimr = I915_READ(DEIMR); |
| 4247 | dev_priv->pm.regsave.sdeimr = I915_READ(SDEIMR); |
| 4248 | dev_priv->pm.regsave.gtimr = I915_READ(GTIMR); |
| 4249 | dev_priv->pm.regsave.gtier = I915_READ(GTIER); |
| 4250 | dev_priv->pm.regsave.gen6_pmimr = I915_READ(GEN6_PMIMR); |
| 4251 | |
| 4252 | ironlake_disable_display_irq(dev_priv, 0xffffffff); |
| 4253 | ibx_disable_display_interrupt(dev_priv, 0xffffffff); |
| 4254 | ilk_disable_gt_irq(dev_priv, 0xffffffff); |
| 4255 | snb_disable_pm_irq(dev_priv, 0xffffffff); |
| 4256 | |
| 4257 | dev_priv->pm.irqs_disabled = true; |
| 4258 | |
| 4259 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 4260 | } |
| 4261 | |
| 4262 | /* Restore interrupts so we can recover from runtime PM. */ |
| 4263 | void hsw_runtime_pm_restore_interrupts(struct drm_device *dev) |
| 4264 | { |
| 4265 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 4266 | unsigned long irqflags; |
| 4267 | uint32_t val; |
| 4268 | |
| 4269 | spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| 4270 | |
| 4271 | val = I915_READ(DEIMR); |
| 4272 | WARN(val != 0xffffffff, "DEIMR is 0x%08x\n" , val); |
| 4273 | |
| 4274 | val = I915_READ(SDEIMR); |
| 4275 | WARN(val != 0xffffffff, "SDEIMR is 0x%08x\n" , val); |
| 4276 | |
| 4277 | val = I915_READ(GTIMR); |
| 4278 | WARN(val != 0xffffffff, "GTIMR is 0x%08x\n" , val); |
| 4279 | |
| 4280 | val = I915_READ(GEN6_PMIMR); |
| 4281 | WARN(val != 0xffffffff, "GEN6_PMIMR is 0x%08x\n" , val); |
| 4282 | |
| 4283 | dev_priv->pm.irqs_disabled = false; |
| 4284 | |
| 4285 | ironlake_enable_display_irq(dev_priv, ~dev_priv->pm.regsave.deimr); |
| 4286 | ibx_enable_display_interrupt(dev_priv, ~dev_priv->pm.regsave.sdeimr); |
| 4287 | ilk_enable_gt_irq(dev_priv, ~dev_priv->pm.regsave.gtimr); |
| 4288 | snb_enable_pm_irq(dev_priv, ~dev_priv->pm.regsave.gen6_pmimr); |
| 4289 | I915_WRITE(GTIER, dev_priv->pm.regsave.gtier); |
| 4290 | |
| 4291 | spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| 4292 | } |
| 4293 | |