i915_irq.c 104 KB

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  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. #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  29. #include <linux/sysrq.h>
  30. #include <linux/slab.h>
  31. #include <drm/drmP.h>
  32. #include <drm/i915_drm.h>
  33. #include "i915_drv.h"
  34. #include "i915_trace.h"
  35. #include "intel_drv.h"
  36. static const u32 hpd_ibx[] = {
  37. [HPD_CRT] = SDE_CRT_HOTPLUG,
  38. [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
  39. [HPD_PORT_B] = SDE_PORTB_HOTPLUG,
  40. [HPD_PORT_C] = SDE_PORTC_HOTPLUG,
  41. [HPD_PORT_D] = SDE_PORTD_HOTPLUG
  42. };
  43. static const u32 hpd_cpt[] = {
  44. [HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
  45. [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
  46. [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
  47. [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
  48. [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
  49. };
  50. static const u32 hpd_mask_i915[] = {
  51. [HPD_CRT] = CRT_HOTPLUG_INT_EN,
  52. [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
  53. [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
  54. [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
  55. [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
  56. [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
  57. };
  58. static const u32 hpd_status_gen4[] = {
  59. [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
  60. [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
  61. [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
  62. [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
  63. [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
  64. [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
  65. };
  66. static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
  67. [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
  68. [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
  69. [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
  70. [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
  71. [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
  72. [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
  73. };
  74. /* For display hotplug interrupt */
  75. static void
  76. ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
  77. {
  78. assert_spin_locked(&dev_priv->irq_lock);
  79. if ((dev_priv->irq_mask & mask) != 0) {
  80. dev_priv->irq_mask &= ~mask;
  81. I915_WRITE(DEIMR, dev_priv->irq_mask);
  82. POSTING_READ(DEIMR);
  83. }
  84. }
  85. static void
  86. ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
  87. {
  88. assert_spin_locked(&dev_priv->irq_lock);
  89. if ((dev_priv->irq_mask & mask) != mask) {
  90. dev_priv->irq_mask |= mask;
  91. I915_WRITE(DEIMR, dev_priv->irq_mask);
  92. POSTING_READ(DEIMR);
  93. }
  94. }
  95. static bool ivb_can_enable_err_int(struct drm_device *dev)
  96. {
  97. struct drm_i915_private *dev_priv = dev->dev_private;
  98. struct intel_crtc *crtc;
  99. enum pipe pipe;
  100. assert_spin_locked(&dev_priv->irq_lock);
  101. for_each_pipe(pipe) {
  102. crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
  103. if (crtc->cpu_fifo_underrun_disabled)
  104. return false;
  105. }
  106. return true;
  107. }
  108. static bool cpt_can_enable_serr_int(struct drm_device *dev)
  109. {
  110. struct drm_i915_private *dev_priv = dev->dev_private;
  111. enum pipe pipe;
  112. struct intel_crtc *crtc;
  113. for_each_pipe(pipe) {
  114. crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
  115. if (crtc->pch_fifo_underrun_disabled)
  116. return false;
  117. }
  118. return true;
  119. }
  120. static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev,
  121. enum pipe pipe, bool enable)
  122. {
  123. struct drm_i915_private *dev_priv = dev->dev_private;
  124. uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN :
  125. DE_PIPEB_FIFO_UNDERRUN;
  126. if (enable)
  127. ironlake_enable_display_irq(dev_priv, bit);
  128. else
  129. ironlake_disable_display_irq(dev_priv, bit);
  130. }
  131. static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
  132. bool enable)
  133. {
  134. struct drm_i915_private *dev_priv = dev->dev_private;
  135. if (enable) {
  136. if (!ivb_can_enable_err_int(dev))
  137. return;
  138. I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN_A |
  139. ERR_INT_FIFO_UNDERRUN_B |
  140. ERR_INT_FIFO_UNDERRUN_C);
  141. ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
  142. } else {
  143. ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
  144. }
  145. }
  146. static void ibx_set_fifo_underrun_reporting(struct intel_crtc *crtc,
  147. bool enable)
  148. {
  149. struct drm_device *dev = crtc->base.dev;
  150. struct drm_i915_private *dev_priv = dev->dev_private;
  151. uint32_t bit = (crtc->pipe == PIPE_A) ? SDE_TRANSA_FIFO_UNDER :
  152. SDE_TRANSB_FIFO_UNDER;
  153. if (enable)
  154. I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~bit);
  155. else
  156. I915_WRITE(SDEIMR, I915_READ(SDEIMR) | bit);
  157. POSTING_READ(SDEIMR);
  158. }
  159. static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
  160. enum transcoder pch_transcoder,
  161. bool enable)
  162. {
  163. struct drm_i915_private *dev_priv = dev->dev_private;
  164. if (enable) {
  165. if (!cpt_can_enable_serr_int(dev))
  166. return;
  167. I915_WRITE(SERR_INT, SERR_INT_TRANS_A_FIFO_UNDERRUN |
  168. SERR_INT_TRANS_B_FIFO_UNDERRUN |
  169. SERR_INT_TRANS_C_FIFO_UNDERRUN);
  170. I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~SDE_ERROR_CPT);
  171. } else {
  172. I915_WRITE(SDEIMR, I915_READ(SDEIMR) | SDE_ERROR_CPT);
  173. }
  174. POSTING_READ(SDEIMR);
  175. }
  176. /**
  177. * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
  178. * @dev: drm device
  179. * @pipe: pipe
  180. * @enable: true if we want to report FIFO underrun errors, false otherwise
  181. *
  182. * This function makes us disable or enable CPU fifo underruns for a specific
  183. * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
  184. * reporting for one pipe may also disable all the other CPU error interruts for
  185. * the other pipes, due to the fact that there's just one interrupt mask/enable
  186. * bit for all the pipes.
  187. *
  188. * Returns the previous state of underrun reporting.
  189. */
  190. bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
  191. enum pipe pipe, bool enable)
  192. {
  193. struct drm_i915_private *dev_priv = dev->dev_private;
  194. struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
  195. struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  196. unsigned long flags;
  197. bool ret;
  198. spin_lock_irqsave(&dev_priv->irq_lock, flags);
  199. ret = !intel_crtc->cpu_fifo_underrun_disabled;
  200. if (enable == ret)
  201. goto done;
  202. intel_crtc->cpu_fifo_underrun_disabled = !enable;
  203. if (IS_GEN5(dev) || IS_GEN6(dev))
  204. ironlake_set_fifo_underrun_reporting(dev, pipe, enable);
  205. else if (IS_GEN7(dev))
  206. ivybridge_set_fifo_underrun_reporting(dev, enable);
  207. done:
  208. spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
  209. return ret;
  210. }
  211. /**
  212. * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
  213. * @dev: drm device
  214. * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
  215. * @enable: true if we want to report FIFO underrun errors, false otherwise
  216. *
  217. * This function makes us disable or enable PCH fifo underruns for a specific
  218. * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
  219. * underrun reporting for one transcoder may also disable all the other PCH
  220. * error interruts for the other transcoders, due to the fact that there's just
  221. * one interrupt mask/enable bit for all the transcoders.
  222. *
  223. * Returns the previous state of underrun reporting.
  224. */
  225. bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
  226. enum transcoder pch_transcoder,
  227. bool enable)
  228. {
  229. struct drm_i915_private *dev_priv = dev->dev_private;
  230. enum pipe p;
  231. struct drm_crtc *crtc;
  232. struct intel_crtc *intel_crtc;
  233. unsigned long flags;
  234. bool ret;
  235. if (HAS_PCH_LPT(dev)) {
  236. crtc = NULL;
  237. for_each_pipe(p) {
  238. struct drm_crtc *c = dev_priv->pipe_to_crtc_mapping[p];
  239. if (intel_pipe_has_type(c, INTEL_OUTPUT_ANALOG)) {
  240. crtc = c;
  241. break;
  242. }
  243. }
  244. if (!crtc) {
  245. DRM_ERROR("PCH FIFO underrun, but no CRTC using the PCH found\n");
  246. return false;
  247. }
  248. } else {
  249. crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder];
  250. }
  251. intel_crtc = to_intel_crtc(crtc);
  252. spin_lock_irqsave(&dev_priv->irq_lock, flags);
  253. ret = !intel_crtc->pch_fifo_underrun_disabled;
  254. if (enable == ret)
  255. goto done;
  256. intel_crtc->pch_fifo_underrun_disabled = !enable;
  257. if (HAS_PCH_IBX(dev))
  258. ibx_set_fifo_underrun_reporting(intel_crtc, enable);
  259. else
  260. cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
  261. done:
  262. spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
  263. return ret;
  264. }
  265. void
  266. i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
  267. {
  268. u32 reg = PIPESTAT(pipe);
  269. u32 pipestat = I915_READ(reg) & 0x7fff0000;
  270. assert_spin_locked(&dev_priv->irq_lock);
  271. if ((pipestat & mask) == mask)
  272. return;
  273. /* Enable the interrupt, clear any pending status */
  274. pipestat |= mask | (mask >> 16);
  275. I915_WRITE(reg, pipestat);
  276. POSTING_READ(reg);
  277. }
  278. void
  279. i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
  280. {
  281. u32 reg = PIPESTAT(pipe);
  282. u32 pipestat = I915_READ(reg) & 0x7fff0000;
  283. assert_spin_locked(&dev_priv->irq_lock);
  284. if ((pipestat & mask) == 0)
  285. return;
  286. pipestat &= ~mask;
  287. I915_WRITE(reg, pipestat);
  288. POSTING_READ(reg);
  289. }
  290. /**
  291. * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
  292. */
  293. static void i915_enable_asle_pipestat(struct drm_device *dev)
  294. {
  295. drm_i915_private_t *dev_priv = dev->dev_private;
  296. unsigned long irqflags;
  297. if (!dev_priv->opregion.asle || !IS_MOBILE(dev))
  298. return;
  299. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  300. i915_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);
  301. if (INTEL_INFO(dev)->gen >= 4)
  302. i915_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
  303. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  304. }
  305. /**
  306. * i915_pipe_enabled - check if a pipe is enabled
  307. * @dev: DRM device
  308. * @pipe: pipe to check
  309. *
  310. * Reading certain registers when the pipe is disabled can hang the chip.
  311. * Use this routine to make sure the PLL is running and the pipe is active
  312. * before reading such registers if unsure.
  313. */
  314. static int
  315. i915_pipe_enabled(struct drm_device *dev, int pipe)
  316. {
  317. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  318. if (drm_core_check_feature(dev, DRIVER_MODESET)) {
  319. /* Locking is horribly broken here, but whatever. */
  320. struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
  321. struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  322. return intel_crtc->active;
  323. } else {
  324. return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
  325. }
  326. }
  327. /* Called from drm generic code, passed a 'crtc', which
  328. * we use as a pipe index
  329. */
  330. static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
  331. {
  332. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  333. unsigned long high_frame;
  334. unsigned long low_frame;
  335. u32 high1, high2, low;
  336. if (!i915_pipe_enabled(dev, pipe)) {
  337. DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
  338. "pipe %c\n", pipe_name(pipe));
  339. return 0;
  340. }
  341. high_frame = PIPEFRAME(pipe);
  342. low_frame = PIPEFRAMEPIXEL(pipe);
  343. /*
  344. * High & low register fields aren't synchronized, so make sure
  345. * we get a low value that's stable across two reads of the high
  346. * register.
  347. */
  348. do {
  349. high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
  350. low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
  351. high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
  352. } while (high1 != high2);
  353. high1 >>= PIPE_FRAME_HIGH_SHIFT;
  354. low >>= PIPE_FRAME_LOW_SHIFT;
  355. return (high1 << 8) | low;
  356. }
  357. static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
  358. {
  359. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  360. int reg = PIPE_FRMCOUNT_GM45(pipe);
  361. if (!i915_pipe_enabled(dev, pipe)) {
  362. DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
  363. "pipe %c\n", pipe_name(pipe));
  364. return 0;
  365. }
  366. return I915_READ(reg);
  367. }
  368. static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
  369. int *vpos, int *hpos)
  370. {
  371. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  372. u32 vbl = 0, position = 0;
  373. int vbl_start, vbl_end, htotal, vtotal;
  374. bool in_vbl = true;
  375. int ret = 0;
  376. enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
  377. pipe);
  378. if (!i915_pipe_enabled(dev, pipe)) {
  379. DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
  380. "pipe %c\n", pipe_name(pipe));
  381. return 0;
  382. }
  383. /* Get vtotal. */
  384. vtotal = 1 + ((I915_READ(VTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
  385. if (INTEL_INFO(dev)->gen >= 4) {
  386. /* No obvious pixelcount register. Only query vertical
  387. * scanout position from Display scan line register.
  388. */
  389. position = I915_READ(PIPEDSL(pipe));
  390. /* Decode into vertical scanout position. Don't have
  391. * horizontal scanout position.
  392. */
  393. *vpos = position & 0x1fff;
  394. *hpos = 0;
  395. } else {
  396. /* Have access to pixelcount since start of frame.
  397. * We can split this into vertical and horizontal
  398. * scanout position.
  399. */
  400. position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
  401. htotal = 1 + ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
  402. *vpos = position / htotal;
  403. *hpos = position - (*vpos * htotal);
  404. }
  405. /* Query vblank area. */
  406. vbl = I915_READ(VBLANK(cpu_transcoder));
  407. /* Test position against vblank region. */
  408. vbl_start = vbl & 0x1fff;
  409. vbl_end = (vbl >> 16) & 0x1fff;
  410. if ((*vpos < vbl_start) || (*vpos > vbl_end))
  411. in_vbl = false;
  412. /* Inside "upper part" of vblank area? Apply corrective offset: */
  413. if (in_vbl && (*vpos >= vbl_start))
  414. *vpos = *vpos - vtotal;
  415. /* Readouts valid? */
  416. if (vbl > 0)
  417. ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
  418. /* In vblank? */
  419. if (in_vbl)
  420. ret |= DRM_SCANOUTPOS_INVBL;
  421. return ret;
  422. }
  423. static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
  424. int *max_error,
  425. struct timeval *vblank_time,
  426. unsigned flags)
  427. {
  428. struct drm_crtc *crtc;
  429. if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) {
  430. DRM_ERROR("Invalid crtc %d\n", pipe);
  431. return -EINVAL;
  432. }
  433. /* Get drm_crtc to timestamp: */
  434. crtc = intel_get_crtc_for_pipe(dev, pipe);
  435. if (crtc == NULL) {
  436. DRM_ERROR("Invalid crtc %d\n", pipe);
  437. return -EINVAL;
  438. }
  439. if (!crtc->enabled) {
  440. DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
  441. return -EBUSY;
  442. }
  443. /* Helper routine in DRM core does all the work: */
  444. return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
  445. vblank_time, flags,
  446. crtc);
  447. }
  448. static int intel_hpd_irq_event(struct drm_device *dev, struct drm_connector *connector)
  449. {
  450. enum drm_connector_status old_status;
  451. WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
  452. old_status = connector->status;
  453. connector->status = connector->funcs->detect(connector, false);
  454. DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
  455. connector->base.id,
  456. drm_get_connector_name(connector),
  457. old_status, connector->status);
  458. return (old_status != connector->status);
  459. }
  460. /*
  461. * Handle hotplug events outside the interrupt handler proper.
  462. */
  463. #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
  464. static void i915_hotplug_work_func(struct work_struct *work)
  465. {
  466. drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
  467. hotplug_work);
  468. struct drm_device *dev = dev_priv->dev;
  469. struct drm_mode_config *mode_config = &dev->mode_config;
  470. struct intel_connector *intel_connector;
  471. struct intel_encoder *intel_encoder;
  472. struct drm_connector *connector;
  473. unsigned long irqflags;
  474. bool hpd_disabled = false;
  475. bool changed = false;
  476. u32 hpd_event_bits;
  477. /* HPD irq before everything is fully set up. */
  478. if (!dev_priv->enable_hotplug_processing)
  479. return;
  480. mutex_lock(&mode_config->mutex);
  481. DRM_DEBUG_KMS("running encoder hotplug functions\n");
  482. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  483. hpd_event_bits = dev_priv->hpd_event_bits;
  484. dev_priv->hpd_event_bits = 0;
  485. list_for_each_entry(connector, &mode_config->connector_list, head) {
  486. intel_connector = to_intel_connector(connector);
  487. intel_encoder = intel_connector->encoder;
  488. if (intel_encoder->hpd_pin > HPD_NONE &&
  489. dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
  490. connector->polled == DRM_CONNECTOR_POLL_HPD) {
  491. DRM_INFO("HPD interrupt storm detected on connector %s: "
  492. "switching from hotplug detection to polling\n",
  493. drm_get_connector_name(connector));
  494. dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
  495. connector->polled = DRM_CONNECTOR_POLL_CONNECT
  496. | DRM_CONNECTOR_POLL_DISCONNECT;
  497. hpd_disabled = true;
  498. }
  499. if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
  500. DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
  501. drm_get_connector_name(connector), intel_encoder->hpd_pin);
  502. }
  503. }
  504. /* if there were no outputs to poll, poll was disabled,
  505. * therefore make sure it's enabled when disabling HPD on
  506. * some connectors */
  507. if (hpd_disabled) {
  508. drm_kms_helper_poll_enable(dev);
  509. mod_timer(&dev_priv->hotplug_reenable_timer,
  510. jiffies + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
  511. }
  512. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  513. list_for_each_entry(connector, &mode_config->connector_list, head) {
  514. intel_connector = to_intel_connector(connector);
  515. intel_encoder = intel_connector->encoder;
  516. if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
  517. if (intel_encoder->hot_plug)
  518. intel_encoder->hot_plug(intel_encoder);
  519. if (intel_hpd_irq_event(dev, connector))
  520. changed = true;
  521. }
  522. }
  523. mutex_unlock(&mode_config->mutex);
  524. if (changed)
  525. drm_kms_helper_hotplug_event(dev);
  526. }
  527. static void ironlake_handle_rps_change(struct drm_device *dev)
  528. {
  529. drm_i915_private_t *dev_priv = dev->dev_private;
  530. u32 busy_up, busy_down, max_avg, min_avg;
  531. u8 new_delay;
  532. unsigned long flags;
  533. spin_lock_irqsave(&mchdev_lock, flags);
  534. I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
  535. new_delay = dev_priv->ips.cur_delay;
  536. I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
  537. busy_up = I915_READ(RCPREVBSYTUPAVG);
  538. busy_down = I915_READ(RCPREVBSYTDNAVG);
  539. max_avg = I915_READ(RCBMAXAVG);
  540. min_avg = I915_READ(RCBMINAVG);
  541. /* Handle RCS change request from hw */
  542. if (busy_up > max_avg) {
  543. if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
  544. new_delay = dev_priv->ips.cur_delay - 1;
  545. if (new_delay < dev_priv->ips.max_delay)
  546. new_delay = dev_priv->ips.max_delay;
  547. } else if (busy_down < min_avg) {
  548. if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
  549. new_delay = dev_priv->ips.cur_delay + 1;
  550. if (new_delay > dev_priv->ips.min_delay)
  551. new_delay = dev_priv->ips.min_delay;
  552. }
  553. if (ironlake_set_drps(dev, new_delay))
  554. dev_priv->ips.cur_delay = new_delay;
  555. spin_unlock_irqrestore(&mchdev_lock, flags);
  556. return;
  557. }
  558. static void notify_ring(struct drm_device *dev,
  559. struct intel_ring_buffer *ring)
  560. {
  561. struct drm_i915_private *dev_priv = dev->dev_private;
  562. if (ring->obj == NULL)
  563. return;
  564. trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false));
  565. wake_up_all(&ring->irq_queue);
  566. if (i915_enable_hangcheck) {
  567. mod_timer(&dev_priv->gpu_error.hangcheck_timer,
  568. round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
  569. }
  570. }
  571. static void gen6_pm_rps_work(struct work_struct *work)
  572. {
  573. drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
  574. rps.work);
  575. u32 pm_iir, pm_imr;
  576. u8 new_delay;
  577. spin_lock_irq(&dev_priv->rps.lock);
  578. pm_iir = dev_priv->rps.pm_iir;
  579. dev_priv->rps.pm_iir = 0;
  580. pm_imr = I915_READ(GEN6_PMIMR);
  581. /* Make sure not to corrupt PMIMR state used by ringbuffer code */
  582. I915_WRITE(GEN6_PMIMR, pm_imr & ~GEN6_PM_RPS_EVENTS);
  583. spin_unlock_irq(&dev_priv->rps.lock);
  584. if ((pm_iir & GEN6_PM_RPS_EVENTS) == 0)
  585. return;
  586. mutex_lock(&dev_priv->rps.hw_lock);
  587. if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
  588. new_delay = dev_priv->rps.cur_delay + 1;
  589. /*
  590. * For better performance, jump directly
  591. * to RPe if we're below it.
  592. */
  593. if (IS_VALLEYVIEW(dev_priv->dev) &&
  594. dev_priv->rps.cur_delay < dev_priv->rps.rpe_delay)
  595. new_delay = dev_priv->rps.rpe_delay;
  596. } else
  597. new_delay = dev_priv->rps.cur_delay - 1;
  598. /* sysfs frequency interfaces may have snuck in while servicing the
  599. * interrupt
  600. */
  601. if (new_delay >= dev_priv->rps.min_delay &&
  602. new_delay <= dev_priv->rps.max_delay) {
  603. if (IS_VALLEYVIEW(dev_priv->dev))
  604. valleyview_set_rps(dev_priv->dev, new_delay);
  605. else
  606. gen6_set_rps(dev_priv->dev, new_delay);
  607. }
  608. if (IS_VALLEYVIEW(dev_priv->dev)) {
  609. /*
  610. * On VLV, when we enter RC6 we may not be at the minimum
  611. * voltage level, so arm a timer to check. It should only
  612. * fire when there's activity or once after we've entered
  613. * RC6, and then won't be re-armed until the next RPS interrupt.
  614. */
  615. mod_delayed_work(dev_priv->wq, &dev_priv->rps.vlv_work,
  616. msecs_to_jiffies(100));
  617. }
  618. mutex_unlock(&dev_priv->rps.hw_lock);
  619. }
  620. /**
  621. * ivybridge_parity_work - Workqueue called when a parity error interrupt
  622. * occurred.
  623. * @work: workqueue struct
  624. *
  625. * Doesn't actually do anything except notify userspace. As a consequence of
  626. * this event, userspace should try to remap the bad rows since statistically
  627. * it is likely the same row is more likely to go bad again.
  628. */
  629. static void ivybridge_parity_work(struct work_struct *work)
  630. {
  631. drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
  632. l3_parity.error_work);
  633. u32 error_status, row, bank, subbank;
  634. char *parity_event[5];
  635. uint32_t misccpctl;
  636. unsigned long flags;
  637. /* We must turn off DOP level clock gating to access the L3 registers.
  638. * In order to prevent a get/put style interface, acquire struct mutex
  639. * any time we access those registers.
  640. */
  641. mutex_lock(&dev_priv->dev->struct_mutex);
  642. misccpctl = I915_READ(GEN7_MISCCPCTL);
  643. I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
  644. POSTING_READ(GEN7_MISCCPCTL);
  645. error_status = I915_READ(GEN7_L3CDERRST1);
  646. row = GEN7_PARITY_ERROR_ROW(error_status);
  647. bank = GEN7_PARITY_ERROR_BANK(error_status);
  648. subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
  649. I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID |
  650. GEN7_L3CDERRST1_ENABLE);
  651. POSTING_READ(GEN7_L3CDERRST1);
  652. I915_WRITE(GEN7_MISCCPCTL, misccpctl);
  653. spin_lock_irqsave(&dev_priv->irq_lock, flags);
  654. dev_priv->gt_irq_mask &= ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
  655. I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
  656. spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
  657. mutex_unlock(&dev_priv->dev->struct_mutex);
  658. parity_event[0] = "L3_PARITY_ERROR=1";
  659. parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
  660. parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
  661. parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
  662. parity_event[4] = NULL;
  663. kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj,
  664. KOBJ_CHANGE, parity_event);
  665. DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
  666. row, bank, subbank);
  667. kfree(parity_event[3]);
  668. kfree(parity_event[2]);
  669. kfree(parity_event[1]);
  670. }
  671. static void ivybridge_handle_parity_error(struct drm_device *dev)
  672. {
  673. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  674. unsigned long flags;
  675. if (!HAS_L3_GPU_CACHE(dev))
  676. return;
  677. spin_lock_irqsave(&dev_priv->irq_lock, flags);
  678. dev_priv->gt_irq_mask |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
  679. I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
  680. spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
  681. queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
  682. }
  683. static void snb_gt_irq_handler(struct drm_device *dev,
  684. struct drm_i915_private *dev_priv,
  685. u32 gt_iir)
  686. {
  687. if (gt_iir &
  688. (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
  689. notify_ring(dev, &dev_priv->ring[RCS]);
  690. if (gt_iir & GT_BSD_USER_INTERRUPT)
  691. notify_ring(dev, &dev_priv->ring[VCS]);
  692. if (gt_iir & GT_BLT_USER_INTERRUPT)
  693. notify_ring(dev, &dev_priv->ring[BCS]);
  694. if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
  695. GT_BSD_CS_ERROR_INTERRUPT |
  696. GT_RENDER_CS_MASTER_ERROR_INTERRUPT)) {
  697. DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
  698. i915_handle_error(dev, false);
  699. }
  700. if (gt_iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
  701. ivybridge_handle_parity_error(dev);
  702. }
  703. /* Legacy way of handling PM interrupts */
  704. static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
  705. u32 pm_iir)
  706. {
  707. unsigned long flags;
  708. /*
  709. * IIR bits should never already be set because IMR should
  710. * prevent an interrupt from being shown in IIR. The warning
  711. * displays a case where we've unsafely cleared
  712. * dev_priv->rps.pm_iir. Although missing an interrupt of the same
  713. * type is not a problem, it displays a problem in the logic.
  714. *
  715. * The mask bit in IMR is cleared by dev_priv->rps.work.
  716. */
  717. spin_lock_irqsave(&dev_priv->rps.lock, flags);
  718. dev_priv->rps.pm_iir |= pm_iir;
  719. I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
  720. POSTING_READ(GEN6_PMIMR);
  721. spin_unlock_irqrestore(&dev_priv->rps.lock, flags);
  722. queue_work(dev_priv->wq, &dev_priv->rps.work);
  723. }
  724. #define HPD_STORM_DETECT_PERIOD 1000
  725. #define HPD_STORM_THRESHOLD 5
  726. static inline void intel_hpd_irq_handler(struct drm_device *dev,
  727. u32 hotplug_trigger,
  728. const u32 *hpd)
  729. {
  730. drm_i915_private_t *dev_priv = dev->dev_private;
  731. int i;
  732. bool storm_detected = false;
  733. if (!hotplug_trigger)
  734. return;
  735. spin_lock(&dev_priv->irq_lock);
  736. for (i = 1; i < HPD_NUM_PINS; i++) {
  737. if (!(hpd[i] & hotplug_trigger) ||
  738. dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
  739. continue;
  740. dev_priv->hpd_event_bits |= (1 << i);
  741. if (!time_in_range(jiffies, dev_priv->hpd_stats[i].hpd_last_jiffies,
  742. dev_priv->hpd_stats[i].hpd_last_jiffies
  743. + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
  744. dev_priv->hpd_stats[i].hpd_last_jiffies = jiffies;
  745. dev_priv->hpd_stats[i].hpd_cnt = 0;
  746. } else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) {
  747. dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
  748. dev_priv->hpd_event_bits &= ~(1 << i);
  749. DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
  750. storm_detected = true;
  751. } else {
  752. dev_priv->hpd_stats[i].hpd_cnt++;
  753. }
  754. }
  755. if (storm_detected)
  756. dev_priv->display.hpd_irq_setup(dev);
  757. spin_unlock(&dev_priv->irq_lock);
  758. queue_work(dev_priv->wq,
  759. &dev_priv->hotplug_work);
  760. }
  761. static void gmbus_irq_handler(struct drm_device *dev)
  762. {
  763. struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
  764. wake_up_all(&dev_priv->gmbus_wait_queue);
  765. }
  766. static void dp_aux_irq_handler(struct drm_device *dev)
  767. {
  768. struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
  769. wake_up_all(&dev_priv->gmbus_wait_queue);
  770. }
  771. /* Unlike gen6_queue_rps_work() from which this function is originally derived,
  772. * we must be able to deal with other PM interrupts. This is complicated because
  773. * of the way in which we use the masks to defer the RPS work (which for
  774. * posterity is necessary because of forcewake).
  775. */
  776. static void hsw_pm_irq_handler(struct drm_i915_private *dev_priv,
  777. u32 pm_iir)
  778. {
  779. unsigned long flags;
  780. spin_lock_irqsave(&dev_priv->rps.lock, flags);
  781. dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS;
  782. if (dev_priv->rps.pm_iir) {
  783. I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
  784. /* never want to mask useful interrupts. (also posting read) */
  785. WARN_ON(I915_READ_NOTRACE(GEN6_PMIMR) & ~GEN6_PM_RPS_EVENTS);
  786. /* TODO: if queue_work is slow, move it out of the spinlock */
  787. queue_work(dev_priv->wq, &dev_priv->rps.work);
  788. }
  789. spin_unlock_irqrestore(&dev_priv->rps.lock, flags);
  790. if (pm_iir & ~GEN6_PM_RPS_EVENTS) {
  791. if (pm_iir & PM_VEBOX_USER_INTERRUPT)
  792. notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
  793. if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) {
  794. DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir);
  795. i915_handle_error(dev_priv->dev, false);
  796. }
  797. }
  798. }
  799. static irqreturn_t valleyview_irq_handler(int irq, void *arg)
  800. {
  801. struct drm_device *dev = (struct drm_device *) arg;
  802. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  803. u32 iir, gt_iir, pm_iir;
  804. irqreturn_t ret = IRQ_NONE;
  805. unsigned long irqflags;
  806. int pipe;
  807. u32 pipe_stats[I915_MAX_PIPES];
  808. atomic_inc(&dev_priv->irq_received);
  809. while (true) {
  810. iir = I915_READ(VLV_IIR);
  811. gt_iir = I915_READ(GTIIR);
  812. pm_iir = I915_READ(GEN6_PMIIR);
  813. if (gt_iir == 0 && pm_iir == 0 && iir == 0)
  814. goto out;
  815. ret = IRQ_HANDLED;
  816. snb_gt_irq_handler(dev, dev_priv, gt_iir);
  817. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  818. for_each_pipe(pipe) {
  819. int reg = PIPESTAT(pipe);
  820. pipe_stats[pipe] = I915_READ(reg);
  821. /*
  822. * Clear the PIPE*STAT regs before the IIR
  823. */
  824. if (pipe_stats[pipe] & 0x8000ffff) {
  825. if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
  826. DRM_DEBUG_DRIVER("pipe %c underrun\n",
  827. pipe_name(pipe));
  828. I915_WRITE(reg, pipe_stats[pipe]);
  829. }
  830. }
  831. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  832. for_each_pipe(pipe) {
  833. if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
  834. drm_handle_vblank(dev, pipe);
  835. if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
  836. intel_prepare_page_flip(dev, pipe);
  837. intel_finish_page_flip(dev, pipe);
  838. }
  839. }
  840. /* Consume port. Then clear IIR or we'll miss events */
  841. if (iir & I915_DISPLAY_PORT_INTERRUPT) {
  842. u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
  843. u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
  844. DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
  845. hotplug_status);
  846. intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
  847. I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
  848. I915_READ(PORT_HOTPLUG_STAT);
  849. }
  850. if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
  851. gmbus_irq_handler(dev);
  852. if (pm_iir & GEN6_PM_RPS_EVENTS)
  853. gen6_queue_rps_work(dev_priv, pm_iir);
  854. I915_WRITE(GTIIR, gt_iir);
  855. I915_WRITE(GEN6_PMIIR, pm_iir);
  856. I915_WRITE(VLV_IIR, iir);
  857. }
  858. out:
  859. return ret;
  860. }
  861. static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
  862. {
  863. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  864. int pipe;
  865. u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
  866. intel_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx);
  867. if (pch_iir & SDE_AUDIO_POWER_MASK) {
  868. int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
  869. SDE_AUDIO_POWER_SHIFT);
  870. DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
  871. port_name(port));
  872. }
  873. if (pch_iir & SDE_AUX_MASK)
  874. dp_aux_irq_handler(dev);
  875. if (pch_iir & SDE_GMBUS)
  876. gmbus_irq_handler(dev);
  877. if (pch_iir & SDE_AUDIO_HDCP_MASK)
  878. DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
  879. if (pch_iir & SDE_AUDIO_TRANS_MASK)
  880. DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
  881. if (pch_iir & SDE_POISON)
  882. DRM_ERROR("PCH poison interrupt\n");
  883. if (pch_iir & SDE_FDI_MASK)
  884. for_each_pipe(pipe)
  885. DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
  886. pipe_name(pipe),
  887. I915_READ(FDI_RX_IIR(pipe)));
  888. if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
  889. DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
  890. if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
  891. DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
  892. if (pch_iir & SDE_TRANSA_FIFO_UNDER)
  893. if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
  894. false))
  895. DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
  896. if (pch_iir & SDE_TRANSB_FIFO_UNDER)
  897. if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
  898. false))
  899. DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
  900. }
  901. static void ivb_err_int_handler(struct drm_device *dev)
  902. {
  903. struct drm_i915_private *dev_priv = dev->dev_private;
  904. u32 err_int = I915_READ(GEN7_ERR_INT);
  905. if (err_int & ERR_INT_POISON)
  906. DRM_ERROR("Poison interrupt\n");
  907. if (err_int & ERR_INT_FIFO_UNDERRUN_A)
  908. if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
  909. DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
  910. if (err_int & ERR_INT_FIFO_UNDERRUN_B)
  911. if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
  912. DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
  913. if (err_int & ERR_INT_FIFO_UNDERRUN_C)
  914. if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_C, false))
  915. DRM_DEBUG_DRIVER("Pipe C FIFO underrun\n");
  916. I915_WRITE(GEN7_ERR_INT, err_int);
  917. }
  918. static void cpt_serr_int_handler(struct drm_device *dev)
  919. {
  920. struct drm_i915_private *dev_priv = dev->dev_private;
  921. u32 serr_int = I915_READ(SERR_INT);
  922. if (serr_int & SERR_INT_POISON)
  923. DRM_ERROR("PCH poison interrupt\n");
  924. if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
  925. if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
  926. false))
  927. DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
  928. if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
  929. if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
  930. false))
  931. DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
  932. if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
  933. if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C,
  934. false))
  935. DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n");
  936. I915_WRITE(SERR_INT, serr_int);
  937. }
  938. static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
  939. {
  940. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  941. int pipe;
  942. u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
  943. intel_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt);
  944. if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
  945. int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
  946. SDE_AUDIO_POWER_SHIFT_CPT);
  947. DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
  948. port_name(port));
  949. }
  950. if (pch_iir & SDE_AUX_MASK_CPT)
  951. dp_aux_irq_handler(dev);
  952. if (pch_iir & SDE_GMBUS_CPT)
  953. gmbus_irq_handler(dev);
  954. if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
  955. DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
  956. if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
  957. DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
  958. if (pch_iir & SDE_FDI_MASK_CPT)
  959. for_each_pipe(pipe)
  960. DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
  961. pipe_name(pipe),
  962. I915_READ(FDI_RX_IIR(pipe)));
  963. if (pch_iir & SDE_ERROR_CPT)
  964. cpt_serr_int_handler(dev);
  965. }
  966. static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
  967. {
  968. struct drm_device *dev = (struct drm_device *) arg;
  969. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  970. u32 de_iir, gt_iir, de_ier, pm_iir, sde_ier = 0;
  971. irqreturn_t ret = IRQ_NONE;
  972. int i;
  973. atomic_inc(&dev_priv->irq_received);
  974. /* We get interrupts on unclaimed registers, so check for this before we
  975. * do any I915_{READ,WRITE}. */
  976. if (IS_HASWELL(dev) &&
  977. (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
  978. DRM_ERROR("Unclaimed register before interrupt\n");
  979. I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
  980. }
  981. /* disable master interrupt before clearing iir */
  982. de_ier = I915_READ(DEIER);
  983. I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
  984. /* Disable south interrupts. We'll only write to SDEIIR once, so further
  985. * interrupts will will be stored on its back queue, and then we'll be
  986. * able to process them after we restore SDEIER (as soon as we restore
  987. * it, we'll get an interrupt if SDEIIR still has something to process
  988. * due to its back queue). */
  989. if (!HAS_PCH_NOP(dev)) {
  990. sde_ier = I915_READ(SDEIER);
  991. I915_WRITE(SDEIER, 0);
  992. POSTING_READ(SDEIER);
  993. }
  994. /* On Haswell, also mask ERR_INT because we don't want to risk
  995. * generating "unclaimed register" interrupts from inside the interrupt
  996. * handler. */
  997. if (IS_HASWELL(dev)) {
  998. spin_lock(&dev_priv->irq_lock);
  999. ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
  1000. spin_unlock(&dev_priv->irq_lock);
  1001. }
  1002. gt_iir = I915_READ(GTIIR);
  1003. if (gt_iir) {
  1004. snb_gt_irq_handler(dev, dev_priv, gt_iir);
  1005. I915_WRITE(GTIIR, gt_iir);
  1006. ret = IRQ_HANDLED;
  1007. }
  1008. de_iir = I915_READ(DEIIR);
  1009. if (de_iir) {
  1010. if (de_iir & DE_ERR_INT_IVB)
  1011. ivb_err_int_handler(dev);
  1012. if (de_iir & DE_AUX_CHANNEL_A_IVB)
  1013. dp_aux_irq_handler(dev);
  1014. if (de_iir & DE_GSE_IVB)
  1015. intel_opregion_asle_intr(dev);
  1016. for (i = 0; i < 3; i++) {
  1017. if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
  1018. drm_handle_vblank(dev, i);
  1019. if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
  1020. intel_prepare_page_flip(dev, i);
  1021. intel_finish_page_flip_plane(dev, i);
  1022. }
  1023. }
  1024. /* check event from PCH */
  1025. if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
  1026. u32 pch_iir = I915_READ(SDEIIR);
  1027. cpt_irq_handler(dev, pch_iir);
  1028. /* clear PCH hotplug event before clear CPU irq */
  1029. I915_WRITE(SDEIIR, pch_iir);
  1030. }
  1031. I915_WRITE(DEIIR, de_iir);
  1032. ret = IRQ_HANDLED;
  1033. }
  1034. pm_iir = I915_READ(GEN6_PMIIR);
  1035. if (pm_iir) {
  1036. if (IS_HASWELL(dev))
  1037. hsw_pm_irq_handler(dev_priv, pm_iir);
  1038. else if (pm_iir & GEN6_PM_RPS_EVENTS)
  1039. gen6_queue_rps_work(dev_priv, pm_iir);
  1040. I915_WRITE(GEN6_PMIIR, pm_iir);
  1041. ret = IRQ_HANDLED;
  1042. }
  1043. if (IS_HASWELL(dev)) {
  1044. spin_lock(&dev_priv->irq_lock);
  1045. if (ivb_can_enable_err_int(dev))
  1046. ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
  1047. spin_unlock(&dev_priv->irq_lock);
  1048. }
  1049. I915_WRITE(DEIER, de_ier);
  1050. POSTING_READ(DEIER);
  1051. if (!HAS_PCH_NOP(dev)) {
  1052. I915_WRITE(SDEIER, sde_ier);
  1053. POSTING_READ(SDEIER);
  1054. }
  1055. return ret;
  1056. }
  1057. static void ilk_gt_irq_handler(struct drm_device *dev,
  1058. struct drm_i915_private *dev_priv,
  1059. u32 gt_iir)
  1060. {
  1061. if (gt_iir &
  1062. (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
  1063. notify_ring(dev, &dev_priv->ring[RCS]);
  1064. if (gt_iir & ILK_BSD_USER_INTERRUPT)
  1065. notify_ring(dev, &dev_priv->ring[VCS]);
  1066. }
  1067. static irqreturn_t ironlake_irq_handler(int irq, void *arg)
  1068. {
  1069. struct drm_device *dev = (struct drm_device *) arg;
  1070. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  1071. int ret = IRQ_NONE;
  1072. u32 de_iir, gt_iir, de_ier, pm_iir, sde_ier;
  1073. atomic_inc(&dev_priv->irq_received);
  1074. /* disable master interrupt before clearing iir */
  1075. de_ier = I915_READ(DEIER);
  1076. I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
  1077. POSTING_READ(DEIER);
  1078. /* Disable south interrupts. We'll only write to SDEIIR once, so further
  1079. * interrupts will will be stored on its back queue, and then we'll be
  1080. * able to process them after we restore SDEIER (as soon as we restore
  1081. * it, we'll get an interrupt if SDEIIR still has something to process
  1082. * due to its back queue). */
  1083. sde_ier = I915_READ(SDEIER);
  1084. I915_WRITE(SDEIER, 0);
  1085. POSTING_READ(SDEIER);
  1086. de_iir = I915_READ(DEIIR);
  1087. gt_iir = I915_READ(GTIIR);
  1088. pm_iir = I915_READ(GEN6_PMIIR);
  1089. if (de_iir == 0 && gt_iir == 0 && (!IS_GEN6(dev) || pm_iir == 0))
  1090. goto done;
  1091. ret = IRQ_HANDLED;
  1092. if (IS_GEN5(dev))
  1093. ilk_gt_irq_handler(dev, dev_priv, gt_iir);
  1094. else
  1095. snb_gt_irq_handler(dev, dev_priv, gt_iir);
  1096. if (de_iir & DE_AUX_CHANNEL_A)
  1097. dp_aux_irq_handler(dev);
  1098. if (de_iir & DE_GSE)
  1099. intel_opregion_asle_intr(dev);
  1100. if (de_iir & DE_PIPEA_VBLANK)
  1101. drm_handle_vblank(dev, 0);
  1102. if (de_iir & DE_PIPEB_VBLANK)
  1103. drm_handle_vblank(dev, 1);
  1104. if (de_iir & DE_POISON)
  1105. DRM_ERROR("Poison interrupt\n");
  1106. if (de_iir & DE_PIPEA_FIFO_UNDERRUN)
  1107. if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
  1108. DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
  1109. if (de_iir & DE_PIPEB_FIFO_UNDERRUN)
  1110. if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
  1111. DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
  1112. if (de_iir & DE_PLANEA_FLIP_DONE) {
  1113. intel_prepare_page_flip(dev, 0);
  1114. intel_finish_page_flip_plane(dev, 0);
  1115. }
  1116. if (de_iir & DE_PLANEB_FLIP_DONE) {
  1117. intel_prepare_page_flip(dev, 1);
  1118. intel_finish_page_flip_plane(dev, 1);
  1119. }
  1120. /* check event from PCH */
  1121. if (de_iir & DE_PCH_EVENT) {
  1122. u32 pch_iir = I915_READ(SDEIIR);
  1123. if (HAS_PCH_CPT(dev))
  1124. cpt_irq_handler(dev, pch_iir);
  1125. else
  1126. ibx_irq_handler(dev, pch_iir);
  1127. /* should clear PCH hotplug event before clear CPU irq */
  1128. I915_WRITE(SDEIIR, pch_iir);
  1129. }
  1130. if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
  1131. ironlake_handle_rps_change(dev);
  1132. if (IS_GEN6(dev) && pm_iir & GEN6_PM_RPS_EVENTS)
  1133. gen6_queue_rps_work(dev_priv, pm_iir);
  1134. I915_WRITE(GTIIR, gt_iir);
  1135. I915_WRITE(DEIIR, de_iir);
  1136. I915_WRITE(GEN6_PMIIR, pm_iir);
  1137. done:
  1138. I915_WRITE(DEIER, de_ier);
  1139. POSTING_READ(DEIER);
  1140. I915_WRITE(SDEIER, sde_ier);
  1141. POSTING_READ(SDEIER);
  1142. return ret;
  1143. }
  1144. /**
  1145. * i915_error_work_func - do process context error handling work
  1146. * @work: work struct
  1147. *
  1148. * Fire an error uevent so userspace can see that a hang or error
  1149. * was detected.
  1150. */
  1151. static void i915_error_work_func(struct work_struct *work)
  1152. {
  1153. struct i915_gpu_error *error = container_of(work, struct i915_gpu_error,
  1154. work);
  1155. drm_i915_private_t *dev_priv = container_of(error, drm_i915_private_t,
  1156. gpu_error);
  1157. struct drm_device *dev = dev_priv->dev;
  1158. struct intel_ring_buffer *ring;
  1159. char *error_event[] = { "ERROR=1", NULL };
  1160. char *reset_event[] = { "RESET=1", NULL };
  1161. char *reset_done_event[] = { "ERROR=0", NULL };
  1162. int i, ret;
  1163. kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
  1164. /*
  1165. * Note that there's only one work item which does gpu resets, so we
  1166. * need not worry about concurrent gpu resets potentially incrementing
  1167. * error->reset_counter twice. We only need to take care of another
  1168. * racing irq/hangcheck declaring the gpu dead for a second time. A
  1169. * quick check for that is good enough: schedule_work ensures the
  1170. * correct ordering between hang detection and this work item, and since
  1171. * the reset in-progress bit is only ever set by code outside of this
  1172. * work we don't need to worry about any other races.
  1173. */
  1174. if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
  1175. DRM_DEBUG_DRIVER("resetting chip\n");
  1176. kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE,
  1177. reset_event);
  1178. ret = i915_reset(dev);
  1179. if (ret == 0) {
  1180. /*
  1181. * After all the gem state is reset, increment the reset
  1182. * counter and wake up everyone waiting for the reset to
  1183. * complete.
  1184. *
  1185. * Since unlock operations are a one-sided barrier only,
  1186. * we need to insert a barrier here to order any seqno
  1187. * updates before
  1188. * the counter increment.
  1189. */
  1190. smp_mb__before_atomic_inc();
  1191. atomic_inc(&dev_priv->gpu_error.reset_counter);
  1192. kobject_uevent_env(&dev->primary->kdev.kobj,
  1193. KOBJ_CHANGE, reset_done_event);
  1194. } else {
  1195. atomic_set(&error->reset_counter, I915_WEDGED);
  1196. }
  1197. for_each_ring(ring, dev_priv, i)
  1198. wake_up_all(&ring->irq_queue);
  1199. intel_display_handle_reset(dev);
  1200. wake_up_all(&dev_priv->gpu_error.reset_queue);
  1201. }
  1202. }
  1203. /* NB: please notice the memset */
  1204. static void i915_get_extra_instdone(struct drm_device *dev,
  1205. uint32_t *instdone)
  1206. {
  1207. struct drm_i915_private *dev_priv = dev->dev_private;
  1208. memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
  1209. switch(INTEL_INFO(dev)->gen) {
  1210. case 2:
  1211. case 3:
  1212. instdone[0] = I915_READ(INSTDONE);
  1213. break;
  1214. case 4:
  1215. case 5:
  1216. case 6:
  1217. instdone[0] = I915_READ(INSTDONE_I965);
  1218. instdone[1] = I915_READ(INSTDONE1);
  1219. break;
  1220. default:
  1221. WARN_ONCE(1, "Unsupported platform\n");
  1222. case 7:
  1223. instdone[0] = I915_READ(GEN7_INSTDONE_1);
  1224. instdone[1] = I915_READ(GEN7_SC_INSTDONE);
  1225. instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
  1226. instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
  1227. break;
  1228. }
  1229. }
  1230. #ifdef CONFIG_DEBUG_FS
  1231. static struct drm_i915_error_object *
  1232. i915_error_object_create_sized(struct drm_i915_private *dev_priv,
  1233. struct drm_i915_gem_object *src,
  1234. const int num_pages)
  1235. {
  1236. struct drm_i915_error_object *dst;
  1237. int i;
  1238. u32 reloc_offset;
  1239. if (src == NULL || src->pages == NULL)
  1240. return NULL;
  1241. dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
  1242. if (dst == NULL)
  1243. return NULL;
  1244. reloc_offset = dst->gtt_offset = i915_gem_obj_ggtt_offset(src);
  1245. for (i = 0; i < num_pages; i++) {
  1246. unsigned long flags;
  1247. void *d;
  1248. d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
  1249. if (d == NULL)
  1250. goto unwind;
  1251. local_irq_save(flags);
  1252. if (reloc_offset < dev_priv->gtt.mappable_end &&
  1253. src->has_global_gtt_mapping) {
  1254. void __iomem *s;
  1255. /* Simply ignore tiling or any overlapping fence.
  1256. * It's part of the error state, and this hopefully
  1257. * captures what the GPU read.
  1258. */
  1259. s = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
  1260. reloc_offset);
  1261. memcpy_fromio(d, s, PAGE_SIZE);
  1262. io_mapping_unmap_atomic(s);
  1263. } else if (src->stolen) {
  1264. unsigned long offset;
  1265. offset = dev_priv->mm.stolen_base;
  1266. offset += src->stolen->start;
  1267. offset += i << PAGE_SHIFT;
  1268. memcpy_fromio(d, (void __iomem *) offset, PAGE_SIZE);
  1269. } else {
  1270. struct page *page;
  1271. void *s;
  1272. page = i915_gem_object_get_page(src, i);
  1273. drm_clflush_pages(&page, 1);
  1274. s = kmap_atomic(page);
  1275. memcpy(d, s, PAGE_SIZE);
  1276. kunmap_atomic(s);
  1277. drm_clflush_pages(&page, 1);
  1278. }
  1279. local_irq_restore(flags);
  1280. dst->pages[i] = d;
  1281. reloc_offset += PAGE_SIZE;
  1282. }
  1283. dst->page_count = num_pages;
  1284. return dst;
  1285. unwind:
  1286. while (i--)
  1287. kfree(dst->pages[i]);
  1288. kfree(dst);
  1289. return NULL;
  1290. }
  1291. #define i915_error_object_create(dev_priv, src) \
  1292. i915_error_object_create_sized((dev_priv), (src), \
  1293. (src)->base.size>>PAGE_SHIFT)
  1294. static void
  1295. i915_error_object_free(struct drm_i915_error_object *obj)
  1296. {
  1297. int page;
  1298. if (obj == NULL)
  1299. return;
  1300. for (page = 0; page < obj->page_count; page++)
  1301. kfree(obj->pages[page]);
  1302. kfree(obj);
  1303. }
  1304. void
  1305. i915_error_state_free(struct kref *error_ref)
  1306. {
  1307. struct drm_i915_error_state *error = container_of(error_ref,
  1308. typeof(*error), ref);
  1309. int i;
  1310. for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
  1311. i915_error_object_free(error->ring[i].batchbuffer);
  1312. i915_error_object_free(error->ring[i].ringbuffer);
  1313. i915_error_object_free(error->ring[i].ctx);
  1314. kfree(error->ring[i].requests);
  1315. }
  1316. kfree(error->active_bo);
  1317. kfree(error->overlay);
  1318. kfree(error->display);
  1319. kfree(error);
  1320. }
  1321. static void capture_bo(struct drm_i915_error_buffer *err,
  1322. struct drm_i915_gem_object *obj)
  1323. {
  1324. err->size = obj->base.size;
  1325. err->name = obj->base.name;
  1326. err->rseqno = obj->last_read_seqno;
  1327. err->wseqno = obj->last_write_seqno;
  1328. err->gtt_offset = i915_gem_obj_ggtt_offset(obj);
  1329. err->read_domains = obj->base.read_domains;
  1330. err->write_domain = obj->base.write_domain;
  1331. err->fence_reg = obj->fence_reg;
  1332. err->pinned = 0;
  1333. if (obj->pin_count > 0)
  1334. err->pinned = 1;
  1335. if (obj->user_pin_count > 0)
  1336. err->pinned = -1;
  1337. err->tiling = obj->tiling_mode;
  1338. err->dirty = obj->dirty;
  1339. err->purgeable = obj->madv != I915_MADV_WILLNEED;
  1340. err->ring = obj->ring ? obj->ring->id : -1;
  1341. err->cache_level = obj->cache_level;
  1342. }
  1343. static u32 capture_active_bo(struct drm_i915_error_buffer *err,
  1344. int count, struct list_head *head)
  1345. {
  1346. struct drm_i915_gem_object *obj;
  1347. int i = 0;
  1348. list_for_each_entry(obj, head, mm_list) {
  1349. capture_bo(err++, obj);
  1350. if (++i == count)
  1351. break;
  1352. }
  1353. return i;
  1354. }
  1355. static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
  1356. int count, struct list_head *head)
  1357. {
  1358. struct drm_i915_gem_object *obj;
  1359. int i = 0;
  1360. list_for_each_entry(obj, head, global_list) {
  1361. if (obj->pin_count == 0)
  1362. continue;
  1363. capture_bo(err++, obj);
  1364. if (++i == count)
  1365. break;
  1366. }
  1367. return i;
  1368. }
  1369. static void i915_gem_record_fences(struct drm_device *dev,
  1370. struct drm_i915_error_state *error)
  1371. {
  1372. struct drm_i915_private *dev_priv = dev->dev_private;
  1373. int i;
  1374. /* Fences */
  1375. switch (INTEL_INFO(dev)->gen) {
  1376. case 7:
  1377. case 6:
  1378. for (i = 0; i < dev_priv->num_fence_regs; i++)
  1379. error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
  1380. break;
  1381. case 5:
  1382. case 4:
  1383. for (i = 0; i < 16; i++)
  1384. error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
  1385. break;
  1386. case 3:
  1387. if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
  1388. for (i = 0; i < 8; i++)
  1389. error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
  1390. case 2:
  1391. for (i = 0; i < 8; i++)
  1392. error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
  1393. break;
  1394. default:
  1395. BUG();
  1396. }
  1397. }
  1398. static struct drm_i915_error_object *
  1399. i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
  1400. struct intel_ring_buffer *ring)
  1401. {
  1402. struct drm_i915_gem_object *obj;
  1403. u32 seqno;
  1404. if (!ring->get_seqno)
  1405. return NULL;
  1406. if (HAS_BROKEN_CS_TLB(dev_priv->dev)) {
  1407. u32 acthd = I915_READ(ACTHD);
  1408. if (WARN_ON(ring->id != RCS))
  1409. return NULL;
  1410. obj = ring->private;
  1411. if (acthd >= i915_gem_obj_ggtt_offset(obj) &&
  1412. acthd < i915_gem_obj_ggtt_offset(obj) + obj->base.size)
  1413. return i915_error_object_create(dev_priv, obj);
  1414. }
  1415. seqno = ring->get_seqno(ring, false);
  1416. list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
  1417. if (obj->ring != ring)
  1418. continue;
  1419. if (i915_seqno_passed(seqno, obj->last_read_seqno))
  1420. continue;
  1421. if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
  1422. continue;
  1423. /* We need to copy these to an anonymous buffer as the simplest
  1424. * method to avoid being overwritten by userspace.
  1425. */
  1426. return i915_error_object_create(dev_priv, obj);
  1427. }
  1428. return NULL;
  1429. }
  1430. static void i915_record_ring_state(struct drm_device *dev,
  1431. struct drm_i915_error_state *error,
  1432. struct intel_ring_buffer *ring)
  1433. {
  1434. struct drm_i915_private *dev_priv = dev->dev_private;
  1435. if (INTEL_INFO(dev)->gen >= 6) {
  1436. error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50);
  1437. error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
  1438. error->semaphore_mboxes[ring->id][0]
  1439. = I915_READ(RING_SYNC_0(ring->mmio_base));
  1440. error->semaphore_mboxes[ring->id][1]
  1441. = I915_READ(RING_SYNC_1(ring->mmio_base));
  1442. error->semaphore_seqno[ring->id][0] = ring->sync_seqno[0];
  1443. error->semaphore_seqno[ring->id][1] = ring->sync_seqno[1];
  1444. }
  1445. if (INTEL_INFO(dev)->gen >= 4) {
  1446. error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
  1447. error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
  1448. error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
  1449. error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
  1450. error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
  1451. if (ring->id == RCS)
  1452. error->bbaddr = I915_READ64(BB_ADDR);
  1453. } else {
  1454. error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
  1455. error->ipeir[ring->id] = I915_READ(IPEIR);
  1456. error->ipehr[ring->id] = I915_READ(IPEHR);
  1457. error->instdone[ring->id] = I915_READ(INSTDONE);
  1458. }
  1459. error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
  1460. error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
  1461. error->seqno[ring->id] = ring->get_seqno(ring, false);
  1462. error->acthd[ring->id] = intel_ring_get_active_head(ring);
  1463. error->head[ring->id] = I915_READ_HEAD(ring);
  1464. error->tail[ring->id] = I915_READ_TAIL(ring);
  1465. error->ctl[ring->id] = I915_READ_CTL(ring);
  1466. error->cpu_ring_head[ring->id] = ring->head;
  1467. error->cpu_ring_tail[ring->id] = ring->tail;
  1468. }
  1469. static void i915_gem_record_active_context(struct intel_ring_buffer *ring,
  1470. struct drm_i915_error_state *error,
  1471. struct drm_i915_error_ring *ering)
  1472. {
  1473. struct drm_i915_private *dev_priv = ring->dev->dev_private;
  1474. struct drm_i915_gem_object *obj;
  1475. /* Currently render ring is the only HW context user */
  1476. if (ring->id != RCS || !error->ccid)
  1477. return;
  1478. list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
  1479. if ((error->ccid & PAGE_MASK) == i915_gem_obj_ggtt_offset(obj)) {
  1480. ering->ctx = i915_error_object_create_sized(dev_priv,
  1481. obj, 1);
  1482. break;
  1483. }
  1484. }
  1485. }
  1486. static void i915_gem_record_rings(struct drm_device *dev,
  1487. struct drm_i915_error_state *error)
  1488. {
  1489. struct drm_i915_private *dev_priv = dev->dev_private;
  1490. struct intel_ring_buffer *ring;
  1491. struct drm_i915_gem_request *request;
  1492. int i, count;
  1493. for_each_ring(ring, dev_priv, i) {
  1494. i915_record_ring_state(dev, error, ring);
  1495. error->ring[i].batchbuffer =
  1496. i915_error_first_batchbuffer(dev_priv, ring);
  1497. error->ring[i].ringbuffer =
  1498. i915_error_object_create(dev_priv, ring->obj);
  1499. i915_gem_record_active_context(ring, error, &error->ring[i]);
  1500. count = 0;
  1501. list_for_each_entry(request, &ring->request_list, list)
  1502. count++;
  1503. error->ring[i].num_requests = count;
  1504. error->ring[i].requests =
  1505. kmalloc(count*sizeof(struct drm_i915_error_request),
  1506. GFP_ATOMIC);
  1507. if (error->ring[i].requests == NULL) {
  1508. error->ring[i].num_requests = 0;
  1509. continue;
  1510. }
  1511. count = 0;
  1512. list_for_each_entry(request, &ring->request_list, list) {
  1513. struct drm_i915_error_request *erq;
  1514. erq = &error->ring[i].requests[count++];
  1515. erq->seqno = request->seqno;
  1516. erq->jiffies = request->emitted_jiffies;
  1517. erq->tail = request->tail;
  1518. }
  1519. }
  1520. }
  1521. static void i915_gem_capture_buffers(struct drm_i915_private *dev_priv,
  1522. struct drm_i915_error_state *error)
  1523. {
  1524. struct drm_i915_gem_object *obj;
  1525. int i;
  1526. i = 0;
  1527. list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
  1528. i++;
  1529. error->active_bo_count = i;
  1530. list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
  1531. if (obj->pin_count)
  1532. i++;
  1533. error->pinned_bo_count = i - error->active_bo_count;
  1534. if (i) {
  1535. error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
  1536. GFP_ATOMIC);
  1537. if (error->active_bo)
  1538. error->pinned_bo =
  1539. error->active_bo + error->active_bo_count;
  1540. }
  1541. if (error->active_bo)
  1542. error->active_bo_count =
  1543. capture_active_bo(error->active_bo,
  1544. error->active_bo_count,
  1545. &dev_priv->mm.active_list);
  1546. if (error->pinned_bo)
  1547. error->pinned_bo_count =
  1548. capture_pinned_bo(error->pinned_bo,
  1549. error->pinned_bo_count,
  1550. &dev_priv->mm.bound_list);
  1551. }
  1552. /**
  1553. * i915_capture_error_state - capture an error record for later analysis
  1554. * @dev: drm device
  1555. *
  1556. * Should be called when an error is detected (either a hang or an error
  1557. * interrupt) to capture error state from the time of the error. Fills
  1558. * out a structure which becomes available in debugfs for user level tools
  1559. * to pick up.
  1560. */
  1561. static void i915_capture_error_state(struct drm_device *dev)
  1562. {
  1563. struct drm_i915_private *dev_priv = dev->dev_private;
  1564. struct drm_i915_error_state *error;
  1565. unsigned long flags;
  1566. int pipe;
  1567. spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
  1568. error = dev_priv->gpu_error.first_error;
  1569. spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
  1570. if (error)
  1571. return;
  1572. /* Account for pipe specific data like PIPE*STAT */
  1573. error = kzalloc(sizeof(*error), GFP_ATOMIC);
  1574. if (!error) {
  1575. DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
  1576. return;
  1577. }
  1578. DRM_INFO("capturing error event; look for more information in "
  1579. "/sys/class/drm/card%d/error\n", dev->primary->index);
  1580. kref_init(&error->ref);
  1581. error->eir = I915_READ(EIR);
  1582. error->pgtbl_er = I915_READ(PGTBL_ER);
  1583. if (HAS_HW_CONTEXTS(dev))
  1584. error->ccid = I915_READ(CCID);
  1585. if (HAS_PCH_SPLIT(dev))
  1586. error->ier = I915_READ(DEIER) | I915_READ(GTIER);
  1587. else if (IS_VALLEYVIEW(dev))
  1588. error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
  1589. else if (IS_GEN2(dev))
  1590. error->ier = I915_READ16(IER);
  1591. else
  1592. error->ier = I915_READ(IER);
  1593. if (INTEL_INFO(dev)->gen >= 6)
  1594. error->derrmr = I915_READ(DERRMR);
  1595. if (IS_VALLEYVIEW(dev))
  1596. error->forcewake = I915_READ(FORCEWAKE_VLV);
  1597. else if (INTEL_INFO(dev)->gen >= 7)
  1598. error->forcewake = I915_READ(FORCEWAKE_MT);
  1599. else if (INTEL_INFO(dev)->gen == 6)
  1600. error->forcewake = I915_READ(FORCEWAKE);
  1601. if (!HAS_PCH_SPLIT(dev))
  1602. for_each_pipe(pipe)
  1603. error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
  1604. if (INTEL_INFO(dev)->gen >= 6) {
  1605. error->error = I915_READ(ERROR_GEN6);
  1606. error->done_reg = I915_READ(DONE_REG);
  1607. }
  1608. if (INTEL_INFO(dev)->gen == 7)
  1609. error->err_int = I915_READ(GEN7_ERR_INT);
  1610. i915_get_extra_instdone(dev, error->extra_instdone);
  1611. i915_gem_capture_buffers(dev_priv, error);
  1612. i915_gem_record_fences(dev, error);
  1613. i915_gem_record_rings(dev, error);
  1614. do_gettimeofday(&error->time);
  1615. error->overlay = intel_overlay_capture_error_state(dev);
  1616. error->display = intel_display_capture_error_state(dev);
  1617. spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
  1618. if (dev_priv->gpu_error.first_error == NULL) {
  1619. dev_priv->gpu_error.first_error = error;
  1620. error = NULL;
  1621. }
  1622. spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
  1623. if (error)
  1624. i915_error_state_free(&error->ref);
  1625. }
  1626. void i915_destroy_error_state(struct drm_device *dev)
  1627. {
  1628. struct drm_i915_private *dev_priv = dev->dev_private;
  1629. struct drm_i915_error_state *error;
  1630. unsigned long flags;
  1631. spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
  1632. error = dev_priv->gpu_error.first_error;
  1633. dev_priv->gpu_error.first_error = NULL;
  1634. spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
  1635. if (error)
  1636. kref_put(&error->ref, i915_error_state_free);
  1637. }
  1638. #else
  1639. #define i915_capture_error_state(x)
  1640. #endif
  1641. static void i915_report_and_clear_eir(struct drm_device *dev)
  1642. {
  1643. struct drm_i915_private *dev_priv = dev->dev_private;
  1644. uint32_t instdone[I915_NUM_INSTDONE_REG];
  1645. u32 eir = I915_READ(EIR);
  1646. int pipe, i;
  1647. if (!eir)
  1648. return;
  1649. pr_err("render error detected, EIR: 0x%08x\n", eir);
  1650. i915_get_extra_instdone(dev, instdone);
  1651. if (IS_G4X(dev)) {
  1652. if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
  1653. u32 ipeir = I915_READ(IPEIR_I965);
  1654. pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
  1655. pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
  1656. for (i = 0; i < ARRAY_SIZE(instdone); i++)
  1657. pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
  1658. pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
  1659. pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
  1660. I915_WRITE(IPEIR_I965, ipeir);
  1661. POSTING_READ(IPEIR_I965);
  1662. }
  1663. if (eir & GM45_ERROR_PAGE_TABLE) {
  1664. u32 pgtbl_err = I915_READ(PGTBL_ER);
  1665. pr_err("page table error\n");
  1666. pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
  1667. I915_WRITE(PGTBL_ER, pgtbl_err);
  1668. POSTING_READ(PGTBL_ER);
  1669. }
  1670. }
  1671. if (!IS_GEN2(dev)) {
  1672. if (eir & I915_ERROR_PAGE_TABLE) {
  1673. u32 pgtbl_err = I915_READ(PGTBL_ER);
  1674. pr_err("page table error\n");
  1675. pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
  1676. I915_WRITE(PGTBL_ER, pgtbl_err);
  1677. POSTING_READ(PGTBL_ER);
  1678. }
  1679. }
  1680. if (eir & I915_ERROR_MEMORY_REFRESH) {
  1681. pr_err("memory refresh error:\n");
  1682. for_each_pipe(pipe)
  1683. pr_err("pipe %c stat: 0x%08x\n",
  1684. pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
  1685. /* pipestat has already been acked */
  1686. }
  1687. if (eir & I915_ERROR_INSTRUCTION) {
  1688. pr_err("instruction error\n");
  1689. pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
  1690. for (i = 0; i < ARRAY_SIZE(instdone); i++)
  1691. pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
  1692. if (INTEL_INFO(dev)->gen < 4) {
  1693. u32 ipeir = I915_READ(IPEIR);
  1694. pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
  1695. pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
  1696. pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
  1697. I915_WRITE(IPEIR, ipeir);
  1698. POSTING_READ(IPEIR);
  1699. } else {
  1700. u32 ipeir = I915_READ(IPEIR_I965);
  1701. pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
  1702. pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
  1703. pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
  1704. pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
  1705. I915_WRITE(IPEIR_I965, ipeir);
  1706. POSTING_READ(IPEIR_I965);
  1707. }
  1708. }
  1709. I915_WRITE(EIR, eir);
  1710. POSTING_READ(EIR);
  1711. eir = I915_READ(EIR);
  1712. if (eir) {
  1713. /*
  1714. * some errors might have become stuck,
  1715. * mask them.
  1716. */
  1717. DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
  1718. I915_WRITE(EMR, I915_READ(EMR) | eir);
  1719. I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
  1720. }
  1721. }
  1722. /**
  1723. * i915_handle_error - handle an error interrupt
  1724. * @dev: drm device
  1725. *
  1726. * Do some basic checking of regsiter state at error interrupt time and
  1727. * dump it to the syslog. Also call i915_capture_error_state() to make
  1728. * sure we get a record and make it available in debugfs. Fire a uevent
  1729. * so userspace knows something bad happened (should trigger collection
  1730. * of a ring dump etc.).
  1731. */
  1732. void i915_handle_error(struct drm_device *dev, bool wedged)
  1733. {
  1734. struct drm_i915_private *dev_priv = dev->dev_private;
  1735. struct intel_ring_buffer *ring;
  1736. int i;
  1737. i915_capture_error_state(dev);
  1738. i915_report_and_clear_eir(dev);
  1739. if (wedged) {
  1740. atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG,
  1741. &dev_priv->gpu_error.reset_counter);
  1742. /*
  1743. * Wakeup waiting processes so that the reset work item
  1744. * doesn't deadlock trying to grab various locks.
  1745. */
  1746. for_each_ring(ring, dev_priv, i)
  1747. wake_up_all(&ring->irq_queue);
  1748. }
  1749. queue_work(dev_priv->wq, &dev_priv->gpu_error.work);
  1750. }
  1751. static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe)
  1752. {
  1753. drm_i915_private_t *dev_priv = dev->dev_private;
  1754. struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
  1755. struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  1756. struct drm_i915_gem_object *obj;
  1757. struct intel_unpin_work *work;
  1758. unsigned long flags;
  1759. bool stall_detected;
  1760. /* Ignore early vblank irqs */
  1761. if (intel_crtc == NULL)
  1762. return;
  1763. spin_lock_irqsave(&dev->event_lock, flags);
  1764. work = intel_crtc->unpin_work;
  1765. if (work == NULL ||
  1766. atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE ||
  1767. !work->enable_stall_check) {
  1768. /* Either the pending flip IRQ arrived, or we're too early. Don't check */
  1769. spin_unlock_irqrestore(&dev->event_lock, flags);
  1770. return;
  1771. }
  1772. /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
  1773. obj = work->pending_flip_obj;
  1774. if (INTEL_INFO(dev)->gen >= 4) {
  1775. int dspsurf = DSPSURF(intel_crtc->plane);
  1776. stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
  1777. i915_gem_obj_ggtt_offset(obj);
  1778. } else {
  1779. int dspaddr = DSPADDR(intel_crtc->plane);
  1780. stall_detected = I915_READ(dspaddr) == (i915_gem_obj_ggtt_offset(obj) +
  1781. crtc->y * crtc->fb->pitches[0] +
  1782. crtc->x * crtc->fb->bits_per_pixel/8);
  1783. }
  1784. spin_unlock_irqrestore(&dev->event_lock, flags);
  1785. if (stall_detected) {
  1786. DRM_DEBUG_DRIVER("Pageflip stall detected\n");
  1787. intel_prepare_page_flip(dev, intel_crtc->plane);
  1788. }
  1789. }
  1790. /* Called from drm generic code, passed 'crtc' which
  1791. * we use as a pipe index
  1792. */
  1793. static int i915_enable_vblank(struct drm_device *dev, int pipe)
  1794. {
  1795. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  1796. unsigned long irqflags;
  1797. if (!i915_pipe_enabled(dev, pipe))
  1798. return -EINVAL;
  1799. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  1800. if (INTEL_INFO(dev)->gen >= 4)
  1801. i915_enable_pipestat(dev_priv, pipe,
  1802. PIPE_START_VBLANK_INTERRUPT_ENABLE);
  1803. else
  1804. i915_enable_pipestat(dev_priv, pipe,
  1805. PIPE_VBLANK_INTERRUPT_ENABLE);
  1806. /* maintain vblank delivery even in deep C-states */
  1807. if (dev_priv->info->gen == 3)
  1808. I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
  1809. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  1810. return 0;
  1811. }
  1812. static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
  1813. {
  1814. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  1815. unsigned long irqflags;
  1816. if (!i915_pipe_enabled(dev, pipe))
  1817. return -EINVAL;
  1818. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  1819. ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
  1820. DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
  1821. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  1822. return 0;
  1823. }
  1824. static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
  1825. {
  1826. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  1827. unsigned long irqflags;
  1828. if (!i915_pipe_enabled(dev, pipe))
  1829. return -EINVAL;
  1830. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  1831. ironlake_enable_display_irq(dev_priv,
  1832. DE_PIPEA_VBLANK_IVB << (5 * pipe));
  1833. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  1834. return 0;
  1835. }
  1836. static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
  1837. {
  1838. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  1839. unsigned long irqflags;
  1840. u32 imr;
  1841. if (!i915_pipe_enabled(dev, pipe))
  1842. return -EINVAL;
  1843. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  1844. imr = I915_READ(VLV_IMR);
  1845. if (pipe == 0)
  1846. imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
  1847. else
  1848. imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
  1849. I915_WRITE(VLV_IMR, imr);
  1850. i915_enable_pipestat(dev_priv, pipe,
  1851. PIPE_START_VBLANK_INTERRUPT_ENABLE);
  1852. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  1853. return 0;
  1854. }
  1855. /* Called from drm generic code, passed 'crtc' which
  1856. * we use as a pipe index
  1857. */
  1858. static void i915_disable_vblank(struct drm_device *dev, int pipe)
  1859. {
  1860. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  1861. unsigned long irqflags;
  1862. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  1863. if (dev_priv->info->gen == 3)
  1864. I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
  1865. i915_disable_pipestat(dev_priv, pipe,
  1866. PIPE_VBLANK_INTERRUPT_ENABLE |
  1867. PIPE_START_VBLANK_INTERRUPT_ENABLE);
  1868. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  1869. }
  1870. static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
  1871. {
  1872. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  1873. unsigned long irqflags;
  1874. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  1875. ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
  1876. DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
  1877. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  1878. }
  1879. static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
  1880. {
  1881. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  1882. unsigned long irqflags;
  1883. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  1884. ironlake_disable_display_irq(dev_priv,
  1885. DE_PIPEA_VBLANK_IVB << (pipe * 5));
  1886. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  1887. }
  1888. static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
  1889. {
  1890. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  1891. unsigned long irqflags;
  1892. u32 imr;
  1893. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  1894. i915_disable_pipestat(dev_priv, pipe,
  1895. PIPE_START_VBLANK_INTERRUPT_ENABLE);
  1896. imr = I915_READ(VLV_IMR);
  1897. if (pipe == 0)
  1898. imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
  1899. else
  1900. imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
  1901. I915_WRITE(VLV_IMR, imr);
  1902. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  1903. }
  1904. static u32
  1905. ring_last_seqno(struct intel_ring_buffer *ring)
  1906. {
  1907. return list_entry(ring->request_list.prev,
  1908. struct drm_i915_gem_request, list)->seqno;
  1909. }
  1910. static bool
  1911. ring_idle(struct intel_ring_buffer *ring, u32 seqno)
  1912. {
  1913. return (list_empty(&ring->request_list) ||
  1914. i915_seqno_passed(seqno, ring_last_seqno(ring)));
  1915. }
  1916. static struct intel_ring_buffer *
  1917. semaphore_waits_for(struct intel_ring_buffer *ring, u32 *seqno)
  1918. {
  1919. struct drm_i915_private *dev_priv = ring->dev->dev_private;
  1920. u32 cmd, ipehr, acthd, acthd_min;
  1921. ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
  1922. if ((ipehr & ~(0x3 << 16)) !=
  1923. (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE | MI_SEMAPHORE_REGISTER))
  1924. return NULL;
  1925. /* ACTHD is likely pointing to the dword after the actual command,
  1926. * so scan backwards until we find the MBOX.
  1927. */
  1928. acthd = intel_ring_get_active_head(ring) & HEAD_ADDR;
  1929. acthd_min = max((int)acthd - 3 * 4, 0);
  1930. do {
  1931. cmd = ioread32(ring->virtual_start + acthd);
  1932. if (cmd == ipehr)
  1933. break;
  1934. acthd -= 4;
  1935. if (acthd < acthd_min)
  1936. return NULL;
  1937. } while (1);
  1938. *seqno = ioread32(ring->virtual_start+acthd+4)+1;
  1939. return &dev_priv->ring[(ring->id + (((ipehr >> 17) & 1) + 1)) % 3];
  1940. }
  1941. static int semaphore_passed(struct intel_ring_buffer *ring)
  1942. {
  1943. struct drm_i915_private *dev_priv = ring->dev->dev_private;
  1944. struct intel_ring_buffer *signaller;
  1945. u32 seqno, ctl;
  1946. ring->hangcheck.deadlock = true;
  1947. signaller = semaphore_waits_for(ring, &seqno);
  1948. if (signaller == NULL || signaller->hangcheck.deadlock)
  1949. return -1;
  1950. /* cursory check for an unkickable deadlock */
  1951. ctl = I915_READ_CTL(signaller);
  1952. if (ctl & RING_WAIT_SEMAPHORE && semaphore_passed(signaller) < 0)
  1953. return -1;
  1954. return i915_seqno_passed(signaller->get_seqno(signaller, false), seqno);
  1955. }
  1956. static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
  1957. {
  1958. struct intel_ring_buffer *ring;
  1959. int i;
  1960. for_each_ring(ring, dev_priv, i)
  1961. ring->hangcheck.deadlock = false;
  1962. }
  1963. static enum intel_ring_hangcheck_action
  1964. ring_stuck(struct intel_ring_buffer *ring, u32 acthd)
  1965. {
  1966. struct drm_device *dev = ring->dev;
  1967. struct drm_i915_private *dev_priv = dev->dev_private;
  1968. u32 tmp;
  1969. if (ring->hangcheck.acthd != acthd)
  1970. return active;
  1971. if (IS_GEN2(dev))
  1972. return hung;
  1973. /* Is the chip hanging on a WAIT_FOR_EVENT?
  1974. * If so we can simply poke the RB_WAIT bit
  1975. * and break the hang. This should work on
  1976. * all but the second generation chipsets.
  1977. */
  1978. tmp = I915_READ_CTL(ring);
  1979. if (tmp & RING_WAIT) {
  1980. DRM_ERROR("Kicking stuck wait on %s\n",
  1981. ring->name);
  1982. I915_WRITE_CTL(ring, tmp);
  1983. return kick;
  1984. }
  1985. if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) {
  1986. switch (semaphore_passed(ring)) {
  1987. default:
  1988. return hung;
  1989. case 1:
  1990. DRM_ERROR("Kicking stuck semaphore on %s\n",
  1991. ring->name);
  1992. I915_WRITE_CTL(ring, tmp);
  1993. return kick;
  1994. case 0:
  1995. return wait;
  1996. }
  1997. }
  1998. return hung;
  1999. }
  2000. /**
  2001. * This is called when the chip hasn't reported back with completed
  2002. * batchbuffers in a long time. We keep track per ring seqno progress and
  2003. * if there are no progress, hangcheck score for that ring is increased.
  2004. * Further, acthd is inspected to see if the ring is stuck. On stuck case
  2005. * we kick the ring. If we see no progress on three subsequent calls
  2006. * we assume chip is wedged and try to fix it by resetting the chip.
  2007. */
  2008. void i915_hangcheck_elapsed(unsigned long data)
  2009. {
  2010. struct drm_device *dev = (struct drm_device *)data;
  2011. drm_i915_private_t *dev_priv = dev->dev_private;
  2012. struct intel_ring_buffer *ring;
  2013. int i;
  2014. int busy_count = 0, rings_hung = 0;
  2015. bool stuck[I915_NUM_RINGS] = { 0 };
  2016. #define BUSY 1
  2017. #define KICK 5
  2018. #define HUNG 20
  2019. #define FIRE 30
  2020. if (!i915_enable_hangcheck)
  2021. return;
  2022. for_each_ring(ring, dev_priv, i) {
  2023. u32 seqno, acthd;
  2024. bool busy = true;
  2025. semaphore_clear_deadlocks(dev_priv);
  2026. seqno = ring->get_seqno(ring, false);
  2027. acthd = intel_ring_get_active_head(ring);
  2028. if (ring->hangcheck.seqno == seqno) {
  2029. if (ring_idle(ring, seqno)) {
  2030. if (waitqueue_active(&ring->irq_queue)) {
  2031. /* Issue a wake-up to catch stuck h/w. */
  2032. DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
  2033. ring->name);
  2034. wake_up_all(&ring->irq_queue);
  2035. ring->hangcheck.score += HUNG;
  2036. } else
  2037. busy = false;
  2038. } else {
  2039. int score;
  2040. /* We always increment the hangcheck score
  2041. * if the ring is busy and still processing
  2042. * the same request, so that no single request
  2043. * can run indefinitely (such as a chain of
  2044. * batches). The only time we do not increment
  2045. * the hangcheck score on this ring, if this
  2046. * ring is in a legitimate wait for another
  2047. * ring. In that case the waiting ring is a
  2048. * victim and we want to be sure we catch the
  2049. * right culprit. Then every time we do kick
  2050. * the ring, add a small increment to the
  2051. * score so that we can catch a batch that is
  2052. * being repeatedly kicked and so responsible
  2053. * for stalling the machine.
  2054. */
  2055. ring->hangcheck.action = ring_stuck(ring,
  2056. acthd);
  2057. switch (ring->hangcheck.action) {
  2058. case wait:
  2059. score = 0;
  2060. break;
  2061. case active:
  2062. score = BUSY;
  2063. break;
  2064. case kick:
  2065. score = KICK;
  2066. break;
  2067. case hung:
  2068. score = HUNG;
  2069. stuck[i] = true;
  2070. break;
  2071. }
  2072. ring->hangcheck.score += score;
  2073. }
  2074. } else {
  2075. /* Gradually reduce the count so that we catch DoS
  2076. * attempts across multiple batches.
  2077. */
  2078. if (ring->hangcheck.score > 0)
  2079. ring->hangcheck.score--;
  2080. }
  2081. ring->hangcheck.seqno = seqno;
  2082. ring->hangcheck.acthd = acthd;
  2083. busy_count += busy;
  2084. }
  2085. for_each_ring(ring, dev_priv, i) {
  2086. if (ring->hangcheck.score > FIRE) {
  2087. DRM_ERROR("%s on %s\n",
  2088. stuck[i] ? "stuck" : "no progress",
  2089. ring->name);
  2090. rings_hung++;
  2091. }
  2092. }
  2093. if (rings_hung)
  2094. return i915_handle_error(dev, true);
  2095. if (busy_count)
  2096. /* Reset timer case chip hangs without another request
  2097. * being added */
  2098. mod_timer(&dev_priv->gpu_error.hangcheck_timer,
  2099. round_jiffies_up(jiffies +
  2100. DRM_I915_HANGCHECK_JIFFIES));
  2101. }
  2102. static void ibx_irq_preinstall(struct drm_device *dev)
  2103. {
  2104. struct drm_i915_private *dev_priv = dev->dev_private;
  2105. if (HAS_PCH_NOP(dev))
  2106. return;
  2107. /* south display irq */
  2108. I915_WRITE(SDEIMR, 0xffffffff);
  2109. /*
  2110. * SDEIER is also touched by the interrupt handler to work around missed
  2111. * PCH interrupts. Hence we can't update it after the interrupt handler
  2112. * is enabled - instead we unconditionally enable all PCH interrupt
  2113. * sources here, but then only unmask them as needed with SDEIMR.
  2114. */
  2115. I915_WRITE(SDEIER, 0xffffffff);
  2116. POSTING_READ(SDEIER);
  2117. }
  2118. /* drm_dma.h hooks
  2119. */
  2120. static void ironlake_irq_preinstall(struct drm_device *dev)
  2121. {
  2122. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2123. atomic_set(&dev_priv->irq_received, 0);
  2124. I915_WRITE(HWSTAM, 0xeffe);
  2125. /* XXX hotplug from PCH */
  2126. I915_WRITE(DEIMR, 0xffffffff);
  2127. I915_WRITE(DEIER, 0x0);
  2128. POSTING_READ(DEIER);
  2129. /* and GT */
  2130. I915_WRITE(GTIMR, 0xffffffff);
  2131. I915_WRITE(GTIER, 0x0);
  2132. POSTING_READ(GTIER);
  2133. ibx_irq_preinstall(dev);
  2134. }
  2135. static void ivybridge_irq_preinstall(struct drm_device *dev)
  2136. {
  2137. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2138. atomic_set(&dev_priv->irq_received, 0);
  2139. I915_WRITE(HWSTAM, 0xeffe);
  2140. /* XXX hotplug from PCH */
  2141. I915_WRITE(DEIMR, 0xffffffff);
  2142. I915_WRITE(DEIER, 0x0);
  2143. POSTING_READ(DEIER);
  2144. /* and GT */
  2145. I915_WRITE(GTIMR, 0xffffffff);
  2146. I915_WRITE(GTIER, 0x0);
  2147. POSTING_READ(GTIER);
  2148. /* Power management */
  2149. I915_WRITE(GEN6_PMIMR, 0xffffffff);
  2150. I915_WRITE(GEN6_PMIER, 0x0);
  2151. POSTING_READ(GEN6_PMIER);
  2152. ibx_irq_preinstall(dev);
  2153. }
  2154. static void valleyview_irq_preinstall(struct drm_device *dev)
  2155. {
  2156. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2157. int pipe;
  2158. atomic_set(&dev_priv->irq_received, 0);
  2159. /* VLV magic */
  2160. I915_WRITE(VLV_IMR, 0);
  2161. I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
  2162. I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
  2163. I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
  2164. /* and GT */
  2165. I915_WRITE(GTIIR, I915_READ(GTIIR));
  2166. I915_WRITE(GTIIR, I915_READ(GTIIR));
  2167. I915_WRITE(GTIMR, 0xffffffff);
  2168. I915_WRITE(GTIER, 0x0);
  2169. POSTING_READ(GTIER);
  2170. I915_WRITE(DPINVGTT, 0xff);
  2171. I915_WRITE(PORT_HOTPLUG_EN, 0);
  2172. I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
  2173. for_each_pipe(pipe)
  2174. I915_WRITE(PIPESTAT(pipe), 0xffff);
  2175. I915_WRITE(VLV_IIR, 0xffffffff);
  2176. I915_WRITE(VLV_IMR, 0xffffffff);
  2177. I915_WRITE(VLV_IER, 0x0);
  2178. POSTING_READ(VLV_IER);
  2179. }
  2180. static void ibx_hpd_irq_setup(struct drm_device *dev)
  2181. {
  2182. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2183. struct drm_mode_config *mode_config = &dev->mode_config;
  2184. struct intel_encoder *intel_encoder;
  2185. u32 mask = ~I915_READ(SDEIMR);
  2186. u32 hotplug;
  2187. if (HAS_PCH_IBX(dev)) {
  2188. mask &= ~SDE_HOTPLUG_MASK;
  2189. list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
  2190. if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
  2191. mask |= hpd_ibx[intel_encoder->hpd_pin];
  2192. } else {
  2193. mask &= ~SDE_HOTPLUG_MASK_CPT;
  2194. list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
  2195. if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
  2196. mask |= hpd_cpt[intel_encoder->hpd_pin];
  2197. }
  2198. I915_WRITE(SDEIMR, ~mask);
  2199. /*
  2200. * Enable digital hotplug on the PCH, and configure the DP short pulse
  2201. * duration to 2ms (which is the minimum in the Display Port spec)
  2202. *
  2203. * This register is the same on all known PCH chips.
  2204. */
  2205. hotplug = I915_READ(PCH_PORT_HOTPLUG);
  2206. hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
  2207. hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
  2208. hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
  2209. hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
  2210. I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
  2211. }
  2212. static void ibx_irq_postinstall(struct drm_device *dev)
  2213. {
  2214. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2215. u32 mask;
  2216. if (HAS_PCH_NOP(dev))
  2217. return;
  2218. if (HAS_PCH_IBX(dev)) {
  2219. mask = SDE_GMBUS | SDE_AUX_MASK | SDE_TRANSB_FIFO_UNDER |
  2220. SDE_TRANSA_FIFO_UNDER | SDE_POISON;
  2221. } else {
  2222. mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT | SDE_ERROR_CPT;
  2223. I915_WRITE(SERR_INT, I915_READ(SERR_INT));
  2224. }
  2225. I915_WRITE(SDEIIR, I915_READ(SDEIIR));
  2226. I915_WRITE(SDEIMR, ~mask);
  2227. }
  2228. static int ironlake_irq_postinstall(struct drm_device *dev)
  2229. {
  2230. unsigned long irqflags;
  2231. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2232. /* enable kind of interrupts always enabled */
  2233. u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
  2234. DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
  2235. DE_AUX_CHANNEL_A | DE_PIPEB_FIFO_UNDERRUN |
  2236. DE_PIPEA_FIFO_UNDERRUN | DE_POISON;
  2237. u32 gt_irqs;
  2238. dev_priv->irq_mask = ~display_mask;
  2239. /* should always can generate irq */
  2240. I915_WRITE(DEIIR, I915_READ(DEIIR));
  2241. I915_WRITE(DEIMR, dev_priv->irq_mask);
  2242. I915_WRITE(DEIER, display_mask |
  2243. DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT);
  2244. POSTING_READ(DEIER);
  2245. dev_priv->gt_irq_mask = ~0;
  2246. I915_WRITE(GTIIR, I915_READ(GTIIR));
  2247. I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
  2248. gt_irqs = GT_RENDER_USER_INTERRUPT;
  2249. if (IS_GEN6(dev))
  2250. gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
  2251. else
  2252. gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT |
  2253. ILK_BSD_USER_INTERRUPT;
  2254. I915_WRITE(GTIER, gt_irqs);
  2255. POSTING_READ(GTIER);
  2256. ibx_irq_postinstall(dev);
  2257. if (IS_IRONLAKE_M(dev)) {
  2258. /* Enable PCU event interrupts
  2259. *
  2260. * spinlocking not required here for correctness since interrupt
  2261. * setup is guaranteed to run in single-threaded context. But we
  2262. * need it to make the assert_spin_locked happy. */
  2263. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  2264. ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
  2265. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  2266. }
  2267. return 0;
  2268. }
  2269. static int ivybridge_irq_postinstall(struct drm_device *dev)
  2270. {
  2271. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2272. /* enable kind of interrupts always enabled */
  2273. u32 display_mask =
  2274. DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB |
  2275. DE_PLANEC_FLIP_DONE_IVB |
  2276. DE_PLANEB_FLIP_DONE_IVB |
  2277. DE_PLANEA_FLIP_DONE_IVB |
  2278. DE_AUX_CHANNEL_A_IVB |
  2279. DE_ERR_INT_IVB;
  2280. u32 pm_irqs = GEN6_PM_RPS_EVENTS;
  2281. u32 gt_irqs;
  2282. dev_priv->irq_mask = ~display_mask;
  2283. /* should always can generate irq */
  2284. I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
  2285. I915_WRITE(DEIIR, I915_READ(DEIIR));
  2286. I915_WRITE(DEIMR, dev_priv->irq_mask);
  2287. I915_WRITE(DEIER,
  2288. display_mask |
  2289. DE_PIPEC_VBLANK_IVB |
  2290. DE_PIPEB_VBLANK_IVB |
  2291. DE_PIPEA_VBLANK_IVB);
  2292. POSTING_READ(DEIER);
  2293. dev_priv->gt_irq_mask = ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
  2294. I915_WRITE(GTIIR, I915_READ(GTIIR));
  2295. I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
  2296. gt_irqs = GT_RENDER_USER_INTERRUPT | GT_BSD_USER_INTERRUPT |
  2297. GT_BLT_USER_INTERRUPT | GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
  2298. I915_WRITE(GTIER, gt_irqs);
  2299. POSTING_READ(GTIER);
  2300. I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
  2301. if (HAS_VEBOX(dev))
  2302. pm_irqs |= PM_VEBOX_USER_INTERRUPT |
  2303. PM_VEBOX_CS_ERROR_INTERRUPT;
  2304. /* Our enable/disable rps functions may touch these registers so
  2305. * make sure to set a known state for only the non-RPS bits.
  2306. * The RMW is extra paranoia since this should be called after being set
  2307. * to a known state in preinstall.
  2308. * */
  2309. I915_WRITE(GEN6_PMIMR,
  2310. (I915_READ(GEN6_PMIMR) | ~GEN6_PM_RPS_EVENTS) & ~pm_irqs);
  2311. I915_WRITE(GEN6_PMIER,
  2312. (I915_READ(GEN6_PMIER) & GEN6_PM_RPS_EVENTS) | pm_irqs);
  2313. POSTING_READ(GEN6_PMIER);
  2314. ibx_irq_postinstall(dev);
  2315. return 0;
  2316. }
  2317. static int valleyview_irq_postinstall(struct drm_device *dev)
  2318. {
  2319. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2320. u32 gt_irqs;
  2321. u32 enable_mask;
  2322. u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
  2323. unsigned long irqflags;
  2324. enable_mask = I915_DISPLAY_PORT_INTERRUPT;
  2325. enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
  2326. I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
  2327. I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
  2328. I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
  2329. /*
  2330. *Leave vblank interrupts masked initially. enable/disable will
  2331. * toggle them based on usage.
  2332. */
  2333. dev_priv->irq_mask = (~enable_mask) |
  2334. I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
  2335. I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
  2336. I915_WRITE(PORT_HOTPLUG_EN, 0);
  2337. POSTING_READ(PORT_HOTPLUG_EN);
  2338. I915_WRITE(VLV_IMR, dev_priv->irq_mask);
  2339. I915_WRITE(VLV_IER, enable_mask);
  2340. I915_WRITE(VLV_IIR, 0xffffffff);
  2341. I915_WRITE(PIPESTAT(0), 0xffff);
  2342. I915_WRITE(PIPESTAT(1), 0xffff);
  2343. POSTING_READ(VLV_IER);
  2344. /* Interrupt setup is already guaranteed to be single-threaded, this is
  2345. * just to make the assert_spin_locked check happy. */
  2346. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  2347. i915_enable_pipestat(dev_priv, 0, pipestat_enable);
  2348. i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
  2349. i915_enable_pipestat(dev_priv, 1, pipestat_enable);
  2350. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  2351. I915_WRITE(VLV_IIR, 0xffffffff);
  2352. I915_WRITE(VLV_IIR, 0xffffffff);
  2353. I915_WRITE(GTIIR, I915_READ(GTIIR));
  2354. I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
  2355. gt_irqs = GT_RENDER_USER_INTERRUPT | GT_BSD_USER_INTERRUPT |
  2356. GT_BLT_USER_INTERRUPT;
  2357. I915_WRITE(GTIER, gt_irqs);
  2358. POSTING_READ(GTIER);
  2359. /* ack & enable invalid PTE error interrupts */
  2360. #if 0 /* FIXME: add support to irq handler for checking these bits */
  2361. I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
  2362. I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
  2363. #endif
  2364. I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
  2365. return 0;
  2366. }
  2367. static void valleyview_irq_uninstall(struct drm_device *dev)
  2368. {
  2369. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2370. int pipe;
  2371. if (!dev_priv)
  2372. return;
  2373. del_timer_sync(&dev_priv->hotplug_reenable_timer);
  2374. for_each_pipe(pipe)
  2375. I915_WRITE(PIPESTAT(pipe), 0xffff);
  2376. I915_WRITE(HWSTAM, 0xffffffff);
  2377. I915_WRITE(PORT_HOTPLUG_EN, 0);
  2378. I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
  2379. for_each_pipe(pipe)
  2380. I915_WRITE(PIPESTAT(pipe), 0xffff);
  2381. I915_WRITE(VLV_IIR, 0xffffffff);
  2382. I915_WRITE(VLV_IMR, 0xffffffff);
  2383. I915_WRITE(VLV_IER, 0x0);
  2384. POSTING_READ(VLV_IER);
  2385. }
  2386. static void ironlake_irq_uninstall(struct drm_device *dev)
  2387. {
  2388. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2389. if (!dev_priv)
  2390. return;
  2391. del_timer_sync(&dev_priv->hotplug_reenable_timer);
  2392. I915_WRITE(HWSTAM, 0xffffffff);
  2393. I915_WRITE(DEIMR, 0xffffffff);
  2394. I915_WRITE(DEIER, 0x0);
  2395. I915_WRITE(DEIIR, I915_READ(DEIIR));
  2396. if (IS_GEN7(dev))
  2397. I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
  2398. I915_WRITE(GTIMR, 0xffffffff);
  2399. I915_WRITE(GTIER, 0x0);
  2400. I915_WRITE(GTIIR, I915_READ(GTIIR));
  2401. if (HAS_PCH_NOP(dev))
  2402. return;
  2403. I915_WRITE(SDEIMR, 0xffffffff);
  2404. I915_WRITE(SDEIER, 0x0);
  2405. I915_WRITE(SDEIIR, I915_READ(SDEIIR));
  2406. if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
  2407. I915_WRITE(SERR_INT, I915_READ(SERR_INT));
  2408. }
  2409. static void i8xx_irq_preinstall(struct drm_device * dev)
  2410. {
  2411. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2412. int pipe;
  2413. atomic_set(&dev_priv->irq_received, 0);
  2414. for_each_pipe(pipe)
  2415. I915_WRITE(PIPESTAT(pipe), 0);
  2416. I915_WRITE16(IMR, 0xffff);
  2417. I915_WRITE16(IER, 0x0);
  2418. POSTING_READ16(IER);
  2419. }
  2420. static int i8xx_irq_postinstall(struct drm_device *dev)
  2421. {
  2422. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2423. I915_WRITE16(EMR,
  2424. ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
  2425. /* Unmask the interrupts that we always want on. */
  2426. dev_priv->irq_mask =
  2427. ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
  2428. I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
  2429. I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
  2430. I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
  2431. I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
  2432. I915_WRITE16(IMR, dev_priv->irq_mask);
  2433. I915_WRITE16(IER,
  2434. I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
  2435. I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
  2436. I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
  2437. I915_USER_INTERRUPT);
  2438. POSTING_READ16(IER);
  2439. return 0;
  2440. }
  2441. /*
  2442. * Returns true when a page flip has completed.
  2443. */
  2444. static bool i8xx_handle_vblank(struct drm_device *dev,
  2445. int pipe, u16 iir)
  2446. {
  2447. drm_i915_private_t *dev_priv = dev->dev_private;
  2448. u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(pipe);
  2449. if (!drm_handle_vblank(dev, pipe))
  2450. return false;
  2451. if ((iir & flip_pending) == 0)
  2452. return false;
  2453. intel_prepare_page_flip(dev, pipe);
  2454. /* We detect FlipDone by looking for the change in PendingFlip from '1'
  2455. * to '0' on the following vblank, i.e. IIR has the Pendingflip
  2456. * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
  2457. * the flip is completed (no longer pending). Since this doesn't raise
  2458. * an interrupt per se, we watch for the change at vblank.
  2459. */
  2460. if (I915_READ16(ISR) & flip_pending)
  2461. return false;
  2462. intel_finish_page_flip(dev, pipe);
  2463. return true;
  2464. }
  2465. static irqreturn_t i8xx_irq_handler(int irq, void *arg)
  2466. {
  2467. struct drm_device *dev = (struct drm_device *) arg;
  2468. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2469. u16 iir, new_iir;
  2470. u32 pipe_stats[2];
  2471. unsigned long irqflags;
  2472. int irq_received;
  2473. int pipe;
  2474. u16 flip_mask =
  2475. I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
  2476. I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
  2477. atomic_inc(&dev_priv->irq_received);
  2478. iir = I915_READ16(IIR);
  2479. if (iir == 0)
  2480. return IRQ_NONE;
  2481. while (iir & ~flip_mask) {
  2482. /* Can't rely on pipestat interrupt bit in iir as it might
  2483. * have been cleared after the pipestat interrupt was received.
  2484. * It doesn't set the bit in iir again, but it still produces
  2485. * interrupts (for non-MSI).
  2486. */
  2487. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  2488. if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
  2489. i915_handle_error(dev, false);
  2490. for_each_pipe(pipe) {
  2491. int reg = PIPESTAT(pipe);
  2492. pipe_stats[pipe] = I915_READ(reg);
  2493. /*
  2494. * Clear the PIPE*STAT regs before the IIR
  2495. */
  2496. if (pipe_stats[pipe] & 0x8000ffff) {
  2497. if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
  2498. DRM_DEBUG_DRIVER("pipe %c underrun\n",
  2499. pipe_name(pipe));
  2500. I915_WRITE(reg, pipe_stats[pipe]);
  2501. irq_received = 1;
  2502. }
  2503. }
  2504. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  2505. I915_WRITE16(IIR, iir & ~flip_mask);
  2506. new_iir = I915_READ16(IIR); /* Flush posted writes */
  2507. i915_update_dri1_breadcrumb(dev);
  2508. if (iir & I915_USER_INTERRUPT)
  2509. notify_ring(dev, &dev_priv->ring[RCS]);
  2510. if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
  2511. i8xx_handle_vblank(dev, 0, iir))
  2512. flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(0);
  2513. if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
  2514. i8xx_handle_vblank(dev, 1, iir))
  2515. flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(1);
  2516. iir = new_iir;
  2517. }
  2518. return IRQ_HANDLED;
  2519. }
  2520. static void i8xx_irq_uninstall(struct drm_device * dev)
  2521. {
  2522. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2523. int pipe;
  2524. for_each_pipe(pipe) {
  2525. /* Clear enable bits; then clear status bits */
  2526. I915_WRITE(PIPESTAT(pipe), 0);
  2527. I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
  2528. }
  2529. I915_WRITE16(IMR, 0xffff);
  2530. I915_WRITE16(IER, 0x0);
  2531. I915_WRITE16(IIR, I915_READ16(IIR));
  2532. }
  2533. static void i915_irq_preinstall(struct drm_device * dev)
  2534. {
  2535. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2536. int pipe;
  2537. atomic_set(&dev_priv->irq_received, 0);
  2538. if (I915_HAS_HOTPLUG(dev)) {
  2539. I915_WRITE(PORT_HOTPLUG_EN, 0);
  2540. I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
  2541. }
  2542. I915_WRITE16(HWSTAM, 0xeffe);
  2543. for_each_pipe(pipe)
  2544. I915_WRITE(PIPESTAT(pipe), 0);
  2545. I915_WRITE(IMR, 0xffffffff);
  2546. I915_WRITE(IER, 0x0);
  2547. POSTING_READ(IER);
  2548. }
  2549. static int i915_irq_postinstall(struct drm_device *dev)
  2550. {
  2551. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2552. u32 enable_mask;
  2553. I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
  2554. /* Unmask the interrupts that we always want on. */
  2555. dev_priv->irq_mask =
  2556. ~(I915_ASLE_INTERRUPT |
  2557. I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
  2558. I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
  2559. I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
  2560. I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
  2561. I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
  2562. enable_mask =
  2563. I915_ASLE_INTERRUPT |
  2564. I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
  2565. I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
  2566. I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
  2567. I915_USER_INTERRUPT;
  2568. if (I915_HAS_HOTPLUG(dev)) {
  2569. I915_WRITE(PORT_HOTPLUG_EN, 0);
  2570. POSTING_READ(PORT_HOTPLUG_EN);
  2571. /* Enable in IER... */
  2572. enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
  2573. /* and unmask in IMR */
  2574. dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
  2575. }
  2576. I915_WRITE(IMR, dev_priv->irq_mask);
  2577. I915_WRITE(IER, enable_mask);
  2578. POSTING_READ(IER);
  2579. i915_enable_asle_pipestat(dev);
  2580. return 0;
  2581. }
  2582. /*
  2583. * Returns true when a page flip has completed.
  2584. */
  2585. static bool i915_handle_vblank(struct drm_device *dev,
  2586. int plane, int pipe, u32 iir)
  2587. {
  2588. drm_i915_private_t *dev_priv = dev->dev_private;
  2589. u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
  2590. if (!drm_handle_vblank(dev, pipe))
  2591. return false;
  2592. if ((iir & flip_pending) == 0)
  2593. return false;
  2594. intel_prepare_page_flip(dev, plane);
  2595. /* We detect FlipDone by looking for the change in PendingFlip from '1'
  2596. * to '0' on the following vblank, i.e. IIR has the Pendingflip
  2597. * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
  2598. * the flip is completed (no longer pending). Since this doesn't raise
  2599. * an interrupt per se, we watch for the change at vblank.
  2600. */
  2601. if (I915_READ(ISR) & flip_pending)
  2602. return false;
  2603. intel_finish_page_flip(dev, pipe);
  2604. return true;
  2605. }
  2606. static irqreturn_t i915_irq_handler(int irq, void *arg)
  2607. {
  2608. struct drm_device *dev = (struct drm_device *) arg;
  2609. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2610. u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
  2611. unsigned long irqflags;
  2612. u32 flip_mask =
  2613. I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
  2614. I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
  2615. int pipe, ret = IRQ_NONE;
  2616. atomic_inc(&dev_priv->irq_received);
  2617. iir = I915_READ(IIR);
  2618. do {
  2619. bool irq_received = (iir & ~flip_mask) != 0;
  2620. bool blc_event = false;
  2621. /* Can't rely on pipestat interrupt bit in iir as it might
  2622. * have been cleared after the pipestat interrupt was received.
  2623. * It doesn't set the bit in iir again, but it still produces
  2624. * interrupts (for non-MSI).
  2625. */
  2626. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  2627. if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
  2628. i915_handle_error(dev, false);
  2629. for_each_pipe(pipe) {
  2630. int reg = PIPESTAT(pipe);
  2631. pipe_stats[pipe] = I915_READ(reg);
  2632. /* Clear the PIPE*STAT regs before the IIR */
  2633. if (pipe_stats[pipe] & 0x8000ffff) {
  2634. if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
  2635. DRM_DEBUG_DRIVER("pipe %c underrun\n",
  2636. pipe_name(pipe));
  2637. I915_WRITE(reg, pipe_stats[pipe]);
  2638. irq_received = true;
  2639. }
  2640. }
  2641. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  2642. if (!irq_received)
  2643. break;
  2644. /* Consume port. Then clear IIR or we'll miss events */
  2645. if ((I915_HAS_HOTPLUG(dev)) &&
  2646. (iir & I915_DISPLAY_PORT_INTERRUPT)) {
  2647. u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
  2648. u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
  2649. DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
  2650. hotplug_status);
  2651. intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
  2652. I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
  2653. POSTING_READ(PORT_HOTPLUG_STAT);
  2654. }
  2655. I915_WRITE(IIR, iir & ~flip_mask);
  2656. new_iir = I915_READ(IIR); /* Flush posted writes */
  2657. if (iir & I915_USER_INTERRUPT)
  2658. notify_ring(dev, &dev_priv->ring[RCS]);
  2659. for_each_pipe(pipe) {
  2660. int plane = pipe;
  2661. if (IS_MOBILE(dev))
  2662. plane = !plane;
  2663. if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
  2664. i915_handle_vblank(dev, plane, pipe, iir))
  2665. flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
  2666. if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
  2667. blc_event = true;
  2668. }
  2669. if (blc_event || (iir & I915_ASLE_INTERRUPT))
  2670. intel_opregion_asle_intr(dev);
  2671. /* With MSI, interrupts are only generated when iir
  2672. * transitions from zero to nonzero. If another bit got
  2673. * set while we were handling the existing iir bits, then
  2674. * we would never get another interrupt.
  2675. *
  2676. * This is fine on non-MSI as well, as if we hit this path
  2677. * we avoid exiting the interrupt handler only to generate
  2678. * another one.
  2679. *
  2680. * Note that for MSI this could cause a stray interrupt report
  2681. * if an interrupt landed in the time between writing IIR and
  2682. * the posting read. This should be rare enough to never
  2683. * trigger the 99% of 100,000 interrupts test for disabling
  2684. * stray interrupts.
  2685. */
  2686. ret = IRQ_HANDLED;
  2687. iir = new_iir;
  2688. } while (iir & ~flip_mask);
  2689. i915_update_dri1_breadcrumb(dev);
  2690. return ret;
  2691. }
  2692. static void i915_irq_uninstall(struct drm_device * dev)
  2693. {
  2694. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2695. int pipe;
  2696. del_timer_sync(&dev_priv->hotplug_reenable_timer);
  2697. if (I915_HAS_HOTPLUG(dev)) {
  2698. I915_WRITE(PORT_HOTPLUG_EN, 0);
  2699. I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
  2700. }
  2701. I915_WRITE16(HWSTAM, 0xffff);
  2702. for_each_pipe(pipe) {
  2703. /* Clear enable bits; then clear status bits */
  2704. I915_WRITE(PIPESTAT(pipe), 0);
  2705. I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
  2706. }
  2707. I915_WRITE(IMR, 0xffffffff);
  2708. I915_WRITE(IER, 0x0);
  2709. I915_WRITE(IIR, I915_READ(IIR));
  2710. }
  2711. static void i965_irq_preinstall(struct drm_device * dev)
  2712. {
  2713. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2714. int pipe;
  2715. atomic_set(&dev_priv->irq_received, 0);
  2716. I915_WRITE(PORT_HOTPLUG_EN, 0);
  2717. I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
  2718. I915_WRITE(HWSTAM, 0xeffe);
  2719. for_each_pipe(pipe)
  2720. I915_WRITE(PIPESTAT(pipe), 0);
  2721. I915_WRITE(IMR, 0xffffffff);
  2722. I915_WRITE(IER, 0x0);
  2723. POSTING_READ(IER);
  2724. }
  2725. static int i965_irq_postinstall(struct drm_device *dev)
  2726. {
  2727. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2728. u32 enable_mask;
  2729. u32 error_mask;
  2730. unsigned long irqflags;
  2731. /* Unmask the interrupts that we always want on. */
  2732. dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
  2733. I915_DISPLAY_PORT_INTERRUPT |
  2734. I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
  2735. I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
  2736. I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
  2737. I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
  2738. I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
  2739. enable_mask = ~dev_priv->irq_mask;
  2740. enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
  2741. I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
  2742. enable_mask |= I915_USER_INTERRUPT;
  2743. if (IS_G4X(dev))
  2744. enable_mask |= I915_BSD_USER_INTERRUPT;
  2745. /* Interrupt setup is already guaranteed to be single-threaded, this is
  2746. * just to make the assert_spin_locked check happy. */
  2747. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  2748. i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
  2749. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  2750. /*
  2751. * Enable some error detection, note the instruction error mask
  2752. * bit is reserved, so we leave it masked.
  2753. */
  2754. if (IS_G4X(dev)) {
  2755. error_mask = ~(GM45_ERROR_PAGE_TABLE |
  2756. GM45_ERROR_MEM_PRIV |
  2757. GM45_ERROR_CP_PRIV |
  2758. I915_ERROR_MEMORY_REFRESH);
  2759. } else {
  2760. error_mask = ~(I915_ERROR_PAGE_TABLE |
  2761. I915_ERROR_MEMORY_REFRESH);
  2762. }
  2763. I915_WRITE(EMR, error_mask);
  2764. I915_WRITE(IMR, dev_priv->irq_mask);
  2765. I915_WRITE(IER, enable_mask);
  2766. POSTING_READ(IER);
  2767. I915_WRITE(PORT_HOTPLUG_EN, 0);
  2768. POSTING_READ(PORT_HOTPLUG_EN);
  2769. i915_enable_asle_pipestat(dev);
  2770. return 0;
  2771. }
  2772. static void i915_hpd_irq_setup(struct drm_device *dev)
  2773. {
  2774. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2775. struct drm_mode_config *mode_config = &dev->mode_config;
  2776. struct intel_encoder *intel_encoder;
  2777. u32 hotplug_en;
  2778. assert_spin_locked(&dev_priv->irq_lock);
  2779. if (I915_HAS_HOTPLUG(dev)) {
  2780. hotplug_en = I915_READ(PORT_HOTPLUG_EN);
  2781. hotplug_en &= ~HOTPLUG_INT_EN_MASK;
  2782. /* Note HDMI and DP share hotplug bits */
  2783. /* enable bits are the same for all generations */
  2784. list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
  2785. if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
  2786. hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
  2787. /* Programming the CRT detection parameters tends
  2788. to generate a spurious hotplug event about three
  2789. seconds later. So just do it once.
  2790. */
  2791. if (IS_G4X(dev))
  2792. hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
  2793. hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
  2794. hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
  2795. /* Ignore TV since it's buggy */
  2796. I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
  2797. }
  2798. }
  2799. static irqreturn_t i965_irq_handler(int irq, void *arg)
  2800. {
  2801. struct drm_device *dev = (struct drm_device *) arg;
  2802. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2803. u32 iir, new_iir;
  2804. u32 pipe_stats[I915_MAX_PIPES];
  2805. unsigned long irqflags;
  2806. int irq_received;
  2807. int ret = IRQ_NONE, pipe;
  2808. u32 flip_mask =
  2809. I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
  2810. I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
  2811. atomic_inc(&dev_priv->irq_received);
  2812. iir = I915_READ(IIR);
  2813. for (;;) {
  2814. bool blc_event = false;
  2815. irq_received = (iir & ~flip_mask) != 0;
  2816. /* Can't rely on pipestat interrupt bit in iir as it might
  2817. * have been cleared after the pipestat interrupt was received.
  2818. * It doesn't set the bit in iir again, but it still produces
  2819. * interrupts (for non-MSI).
  2820. */
  2821. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  2822. if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
  2823. i915_handle_error(dev, false);
  2824. for_each_pipe(pipe) {
  2825. int reg = PIPESTAT(pipe);
  2826. pipe_stats[pipe] = I915_READ(reg);
  2827. /*
  2828. * Clear the PIPE*STAT regs before the IIR
  2829. */
  2830. if (pipe_stats[pipe] & 0x8000ffff) {
  2831. if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
  2832. DRM_DEBUG_DRIVER("pipe %c underrun\n",
  2833. pipe_name(pipe));
  2834. I915_WRITE(reg, pipe_stats[pipe]);
  2835. irq_received = 1;
  2836. }
  2837. }
  2838. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  2839. if (!irq_received)
  2840. break;
  2841. ret = IRQ_HANDLED;
  2842. /* Consume port. Then clear IIR or we'll miss events */
  2843. if (iir & I915_DISPLAY_PORT_INTERRUPT) {
  2844. u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
  2845. u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ?
  2846. HOTPLUG_INT_STATUS_G4X :
  2847. HOTPLUG_INT_STATUS_I915);
  2848. DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
  2849. hotplug_status);
  2850. intel_hpd_irq_handler(dev, hotplug_trigger,
  2851. IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i915);
  2852. I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
  2853. I915_READ(PORT_HOTPLUG_STAT);
  2854. }
  2855. I915_WRITE(IIR, iir & ~flip_mask);
  2856. new_iir = I915_READ(IIR); /* Flush posted writes */
  2857. if (iir & I915_USER_INTERRUPT)
  2858. notify_ring(dev, &dev_priv->ring[RCS]);
  2859. if (iir & I915_BSD_USER_INTERRUPT)
  2860. notify_ring(dev, &dev_priv->ring[VCS]);
  2861. for_each_pipe(pipe) {
  2862. if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
  2863. i915_handle_vblank(dev, pipe, pipe, iir))
  2864. flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
  2865. if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
  2866. blc_event = true;
  2867. }
  2868. if (blc_event || (iir & I915_ASLE_INTERRUPT))
  2869. intel_opregion_asle_intr(dev);
  2870. if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
  2871. gmbus_irq_handler(dev);
  2872. /* With MSI, interrupts are only generated when iir
  2873. * transitions from zero to nonzero. If another bit got
  2874. * set while we were handling the existing iir bits, then
  2875. * we would never get another interrupt.
  2876. *
  2877. * This is fine on non-MSI as well, as if we hit this path
  2878. * we avoid exiting the interrupt handler only to generate
  2879. * another one.
  2880. *
  2881. * Note that for MSI this could cause a stray interrupt report
  2882. * if an interrupt landed in the time between writing IIR and
  2883. * the posting read. This should be rare enough to never
  2884. * trigger the 99% of 100,000 interrupts test for disabling
  2885. * stray interrupts.
  2886. */
  2887. iir = new_iir;
  2888. }
  2889. i915_update_dri1_breadcrumb(dev);
  2890. return ret;
  2891. }
  2892. static void i965_irq_uninstall(struct drm_device * dev)
  2893. {
  2894. drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
  2895. int pipe;
  2896. if (!dev_priv)
  2897. return;
  2898. del_timer_sync(&dev_priv->hotplug_reenable_timer);
  2899. I915_WRITE(PORT_HOTPLUG_EN, 0);
  2900. I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
  2901. I915_WRITE(HWSTAM, 0xffffffff);
  2902. for_each_pipe(pipe)
  2903. I915_WRITE(PIPESTAT(pipe), 0);
  2904. I915_WRITE(IMR, 0xffffffff);
  2905. I915_WRITE(IER, 0x0);
  2906. for_each_pipe(pipe)
  2907. I915_WRITE(PIPESTAT(pipe),
  2908. I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
  2909. I915_WRITE(IIR, I915_READ(IIR));
  2910. }
  2911. static void i915_reenable_hotplug_timer_func(unsigned long data)
  2912. {
  2913. drm_i915_private_t *dev_priv = (drm_i915_private_t *)data;
  2914. struct drm_device *dev = dev_priv->dev;
  2915. struct drm_mode_config *mode_config = &dev->mode_config;
  2916. unsigned long irqflags;
  2917. int i;
  2918. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  2919. for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
  2920. struct drm_connector *connector;
  2921. if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED)
  2922. continue;
  2923. dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
  2924. list_for_each_entry(connector, &mode_config->connector_list, head) {
  2925. struct intel_connector *intel_connector = to_intel_connector(connector);
  2926. if (intel_connector->encoder->hpd_pin == i) {
  2927. if (connector->polled != intel_connector->polled)
  2928. DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
  2929. drm_get_connector_name(connector));
  2930. connector->polled = intel_connector->polled;
  2931. if (!connector->polled)
  2932. connector->polled = DRM_CONNECTOR_POLL_HPD;
  2933. }
  2934. }
  2935. }
  2936. if (dev_priv->display.hpd_irq_setup)
  2937. dev_priv->display.hpd_irq_setup(dev);
  2938. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  2939. }
  2940. void intel_irq_init(struct drm_device *dev)
  2941. {
  2942. struct drm_i915_private *dev_priv = dev->dev_private;
  2943. INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
  2944. INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func);
  2945. INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
  2946. INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
  2947. setup_timer(&dev_priv->gpu_error.hangcheck_timer,
  2948. i915_hangcheck_elapsed,
  2949. (unsigned long) dev);
  2950. setup_timer(&dev_priv->hotplug_reenable_timer, i915_reenable_hotplug_timer_func,
  2951. (unsigned long) dev_priv);
  2952. pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
  2953. dev->driver->get_vblank_counter = i915_get_vblank_counter;
  2954. dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
  2955. if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
  2956. dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
  2957. dev->driver->get_vblank_counter = gm45_get_vblank_counter;
  2958. }
  2959. if (drm_core_check_feature(dev, DRIVER_MODESET))
  2960. dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
  2961. else
  2962. dev->driver->get_vblank_timestamp = NULL;
  2963. dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
  2964. if (IS_VALLEYVIEW(dev)) {
  2965. dev->driver->irq_handler = valleyview_irq_handler;
  2966. dev->driver->irq_preinstall = valleyview_irq_preinstall;
  2967. dev->driver->irq_postinstall = valleyview_irq_postinstall;
  2968. dev->driver->irq_uninstall = valleyview_irq_uninstall;
  2969. dev->driver->enable_vblank = valleyview_enable_vblank;
  2970. dev->driver->disable_vblank = valleyview_disable_vblank;
  2971. dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
  2972. } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
  2973. /* Share uninstall handlers with ILK/SNB */
  2974. dev->driver->irq_handler = ivybridge_irq_handler;
  2975. dev->driver->irq_preinstall = ivybridge_irq_preinstall;
  2976. dev->driver->irq_postinstall = ivybridge_irq_postinstall;
  2977. dev->driver->irq_uninstall = ironlake_irq_uninstall;
  2978. dev->driver->enable_vblank = ivybridge_enable_vblank;
  2979. dev->driver->disable_vblank = ivybridge_disable_vblank;
  2980. dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
  2981. } else if (HAS_PCH_SPLIT(dev)) {
  2982. dev->driver->irq_handler = ironlake_irq_handler;
  2983. dev->driver->irq_preinstall = ironlake_irq_preinstall;
  2984. dev->driver->irq_postinstall = ironlake_irq_postinstall;
  2985. dev->driver->irq_uninstall = ironlake_irq_uninstall;
  2986. dev->driver->enable_vblank = ironlake_enable_vblank;
  2987. dev->driver->disable_vblank = ironlake_disable_vblank;
  2988. dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
  2989. } else {
  2990. if (INTEL_INFO(dev)->gen == 2) {
  2991. dev->driver->irq_preinstall = i8xx_irq_preinstall;
  2992. dev->driver->irq_postinstall = i8xx_irq_postinstall;
  2993. dev->driver->irq_handler = i8xx_irq_handler;
  2994. dev->driver->irq_uninstall = i8xx_irq_uninstall;
  2995. } else if (INTEL_INFO(dev)->gen == 3) {
  2996. dev->driver->irq_preinstall = i915_irq_preinstall;
  2997. dev->driver->irq_postinstall = i915_irq_postinstall;
  2998. dev->driver->irq_uninstall = i915_irq_uninstall;
  2999. dev->driver->irq_handler = i915_irq_handler;
  3000. dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
  3001. } else {
  3002. dev->driver->irq_preinstall = i965_irq_preinstall;
  3003. dev->driver->irq_postinstall = i965_irq_postinstall;
  3004. dev->driver->irq_uninstall = i965_irq_uninstall;
  3005. dev->driver->irq_handler = i965_irq_handler;
  3006. dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
  3007. }
  3008. dev->driver->enable_vblank = i915_enable_vblank;
  3009. dev->driver->disable_vblank = i915_disable_vblank;
  3010. }
  3011. }
  3012. void intel_hpd_init(struct drm_device *dev)
  3013. {
  3014. struct drm_i915_private *dev_priv = dev->dev_private;
  3015. struct drm_mode_config *mode_config = &dev->mode_config;
  3016. struct drm_connector *connector;
  3017. unsigned long irqflags;
  3018. int i;
  3019. for (i = 1; i < HPD_NUM_PINS; i++) {
  3020. dev_priv->hpd_stats[i].hpd_cnt = 0;
  3021. dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
  3022. }
  3023. list_for_each_entry(connector, &mode_config->connector_list, head) {
  3024. struct intel_connector *intel_connector = to_intel_connector(connector);
  3025. connector->polled = intel_connector->polled;
  3026. if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE)
  3027. connector->polled = DRM_CONNECTOR_POLL_HPD;
  3028. }
  3029. /* Interrupt setup is already guaranteed to be single-threaded, this is
  3030. * just to make the assert_spin_locked checks happy. */
  3031. spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  3032. if (dev_priv->display.hpd_irq_setup)
  3033. dev_priv->display.hpd_irq_setup(dev);
  3034. spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
  3035. }