/* i915_irq.c -- IRQ support for the I915 -*- linux-c -*- */ /* * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */ #include #include #include "drmP.h" #include "drm.h" #include "i915_drm.h" #include "i915_drv.h" #include "i915_trace.h" #include "intel_drv.h" #define MAX_NOPID ((u32)~0) /** * Interrupts that are always left unmasked. * * Since pipe events are edge-triggered from the PIPESTAT register to IIR, * we leave them always unmasked in IMR and then control enabling them through * PIPESTAT alone. */ #define I915_INTERRUPT_ENABLE_FIX \ (I915_ASLE_INTERRUPT | \ I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | \ I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | \ I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | \ I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | \ I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) /** Interrupts that we mask and unmask at runtime. */ #define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT | I915_BSD_USER_INTERRUPT) #define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\ PIPE_VBLANK_INTERRUPT_STATUS) #define I915_PIPE_VBLANK_ENABLE (PIPE_START_VBLANK_INTERRUPT_ENABLE |\ PIPE_VBLANK_INTERRUPT_ENABLE) #define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \ DRM_I915_VBLANK_PIPE_B) /* For display hotplug interrupt */ static void ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask) { if ((dev_priv->irq_mask & mask) != 0) { dev_priv->irq_mask &= ~mask; I915_WRITE(DEIMR, dev_priv->irq_mask); POSTING_READ(DEIMR); } } static inline void ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask) { if ((dev_priv->irq_mask & mask) != mask) { dev_priv->irq_mask |= mask; I915_WRITE(DEIMR, dev_priv->irq_mask); POSTING_READ(DEIMR); } } void i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) { if ((dev_priv->pipestat[pipe] & mask) != mask) { u32 reg = PIPESTAT(pipe); dev_priv->pipestat[pipe] |= mask; /* Enable the interrupt, clear any pending status */ I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16)); POSTING_READ(reg); } } void i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) { if ((dev_priv->pipestat[pipe] & mask) != 0) { u32 reg = PIPESTAT(pipe); dev_priv->pipestat[pipe] &= ~mask; I915_WRITE(reg, dev_priv->pipestat[pipe]); POSTING_READ(reg); } } /** * intel_enable_asle - enable ASLE interrupt for OpRegion */ void intel_enable_asle(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; unsigned long irqflags; spin_lock_irqsave(&dev_priv->irq_lock, irqflags); if (HAS_PCH_SPLIT(dev)) ironlake_enable_display_irq(dev_priv, DE_GSE); else { i915_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE); if (INTEL_INFO(dev)->gen >= 4) i915_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE); } spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); } /** * i915_pipe_enabled - check if a pipe is enabled * @dev: DRM device * @pipe: pipe to check * * Reading certain registers when the pipe is disabled can hang the chip. * Use this routine to make sure the PLL is running and the pipe is active * before reading such registers if unsure. */ static int i915_pipe_enabled(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE; } /* Called from drm generic code, passed a 'crtc', which * we use as a pipe index */ static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long high_frame; unsigned long low_frame; u32 high1, high2, low; if (!i915_pipe_enabled(dev, pipe)) { DRM_DEBUG_DRIVER("trying to get vblank count for disabled " "pipe %c\n", pipe_name(pipe)); return 0; } high_frame = PIPEFRAME(pipe); low_frame = PIPEFRAMEPIXEL(pipe); /* * High & low register fields aren't synchronized, so make sure * we get a low value that's stable across two reads of the high * register. */ do { high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK; low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK; high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK; } while (high1 != high2); high1 >>= PIPE_FRAME_HIGH_SHIFT; low >>= PIPE_FRAME_LOW_SHIFT; return (high1 << 8) | low; } static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int reg = PIPE_FRMCOUNT_GM45(pipe); if (!i915_pipe_enabled(dev, pipe)) { DRM_DEBUG_DRIVER("trying to get vblank count for disabled " "pipe %c\n", pipe_name(pipe)); return 0; } return I915_READ(reg); } static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe, int *vpos, int *hpos) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u32 vbl = 0, position = 0; int vbl_start, vbl_end, htotal, vtotal; bool in_vbl = true; int ret = 0; if (!i915_pipe_enabled(dev, pipe)) { DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled " "pipe %c\n", pipe_name(pipe)); return 0; } /* Get vtotal. */ vtotal = 1 + ((I915_READ(VTOTAL(pipe)) >> 16) & 0x1fff); if (INTEL_INFO(dev)->gen >= 4) { /* No obvious pixelcount register. Only query vertical * scanout position from Display scan line register. */ position = I915_READ(PIPEDSL(pipe)); /* Decode into vertical scanout position. Don't have * horizontal scanout position. */ *vpos = position & 0x1fff; *hpos = 0; } else { /* Have access to pixelcount since start of frame. * We can split this into vertical and horizontal * scanout position. */ position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT; htotal = 1 + ((I915_READ(HTOTAL(pipe)) >> 16) & 0x1fff); *vpos = position / htotal; *hpos = position - (*vpos * htotal); } /* Query vblank area. */ vbl = I915_READ(VBLANK(pipe)); /* Test position against vblank region. */ vbl_start = vbl & 0x1fff; vbl_end = (vbl >> 16) & 0x1fff; if ((*vpos < vbl_start) || (*vpos > vbl_end)) in_vbl = false; /* Inside "upper part" of vblank area? Apply corrective offset: */ if (in_vbl && (*vpos >= vbl_start)) *vpos = *vpos - vtotal; /* Readouts valid? */ if (vbl > 0) ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE; /* In vblank? */ if (in_vbl) ret |= DRM_SCANOUTPOS_INVBL; return ret; } static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe, int *max_error, struct timeval *vblank_time, unsigned flags) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_crtc *crtc; if (pipe < 0 || pipe >= dev_priv->num_pipe) { DRM_ERROR("Invalid crtc %d\n", pipe); return -EINVAL; } /* Get drm_crtc to timestamp: */ crtc = intel_get_crtc_for_pipe(dev, pipe); if (crtc == NULL) { DRM_ERROR("Invalid crtc %d\n", pipe); return -EINVAL; } if (!crtc->enabled) { DRM_DEBUG_KMS("crtc %d is disabled\n", pipe); return -EBUSY; } /* Helper routine in DRM core does all the work: */ return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error, vblank_time, flags, crtc); } /* * Handle hotplug events outside the interrupt handler proper. */ static void i915_hotplug_work_func(struct work_struct *work) { drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, hotplug_work); struct drm_device *dev = dev_priv->dev; struct drm_mode_config *mode_config = &dev->mode_config; struct intel_encoder *encoder; mutex_lock(&mode_config->mutex); DRM_DEBUG_KMS("running encoder hotplug functions\n"); list_for_each_entry(encoder, &mode_config->encoder_list, base.head) if (encoder->hot_plug) encoder->hot_plug(encoder); mutex_unlock(&mode_config->mutex); /* Just fire off a uevent and let userspace tell us what to do */ drm_helper_hpd_irq_event(dev); } static void i915_handle_rps_change(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; u32 busy_up, busy_down, max_avg, min_avg; u8 new_delay = dev_priv->cur_delay; I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG); busy_up = I915_READ(RCPREVBSYTUPAVG); busy_down = I915_READ(RCPREVBSYTDNAVG); max_avg = I915_READ(RCBMAXAVG); min_avg = I915_READ(RCBMINAVG); /* Handle RCS change request from hw */ if (busy_up > max_avg) { if (dev_priv->cur_delay != dev_priv->max_delay) new_delay = dev_priv->cur_delay - 1; if (new_delay < dev_priv->max_delay) new_delay = dev_priv->max_delay; } else if (busy_down < min_avg) { if (dev_priv->cur_delay != dev_priv->min_delay) new_delay = dev_priv->cur_delay + 1; if (new_delay > dev_priv->min_delay) new_delay = dev_priv->min_delay; } if (ironlake_set_drps(dev, new_delay)) dev_priv->cur_delay = new_delay; return; } static void notify_ring(struct drm_device *dev, struct intel_ring_buffer *ring) { struct drm_i915_private *dev_priv = dev->dev_private; u32 seqno; if (ring->obj == NULL) return; seqno = ring->get_seqno(ring); trace_i915_gem_request_complete(ring, seqno); ring->irq_seqno = seqno; wake_up_all(&ring->irq_queue); dev_priv->hangcheck_count = 0; mod_timer(&dev_priv->hangcheck_timer, jiffies + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD)); } static void gen6_pm_rps_work(struct work_struct *work) { drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, rps_work); u8 new_delay = dev_priv->cur_delay; u32 pm_iir, pm_imr; spin_lock_irq(&dev_priv->rps_lock); pm_iir = dev_priv->pm_iir; dev_priv->pm_iir = 0; pm_imr = I915_READ(GEN6_PMIMR); spin_unlock_irq(&dev_priv->rps_lock); if (!pm_iir) return; mutex_lock(&dev_priv->dev->struct_mutex); if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) { if (dev_priv->cur_delay != dev_priv->max_delay) new_delay = dev_priv->cur_delay + 1; if (new_delay > dev_priv->max_delay) new_delay = dev_priv->max_delay; } else if (pm_iir & (GEN6_PM_RP_DOWN_THRESHOLD | GEN6_PM_RP_DOWN_TIMEOUT)) { gen6_gt_force_wake_get(dev_priv); if (dev_priv->cur_delay != dev_priv->min_delay) new_delay = dev_priv->cur_delay - 1; if (new_delay < dev_priv->min_delay) { new_delay = dev_priv->min_delay; I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, I915_READ(GEN6_RP_INTERRUPT_LIMITS) | ((new_delay << 16) & 0x3f0000)); } else { /* Make sure we continue to get down interrupts * until we hit the minimum frequency */ I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, I915_READ(GEN6_RP_INTERRUPT_LIMITS) & ~0x3f0000); } gen6_gt_force_wake_put(dev_priv); } gen6_set_rps(dev_priv->dev, new_delay); dev_priv->cur_delay = new_delay; /* * rps_lock not held here because clearing is non-destructive. There is * an *extremely* unlikely race with gen6_rps_enable() that is prevented * by holding struct_mutex for the duration of the write. */ I915_WRITE(GEN6_PMIMR, pm_imr & ~pm_iir); mutex_unlock(&dev_priv->dev->struct_mutex); } static void pch_irq_handler(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u32 pch_iir; int pipe; pch_iir = I915_READ(SDEIIR); if (pch_iir & SDE_AUDIO_POWER_MASK) DRM_DEBUG_DRIVER("PCH audio power change on port %d\n", (pch_iir & SDE_AUDIO_POWER_MASK) >> SDE_AUDIO_POWER_SHIFT); if (pch_iir & SDE_GMBUS) DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n"); if (pch_iir & SDE_AUDIO_HDCP_MASK) DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n"); if (pch_iir & SDE_AUDIO_TRANS_MASK) DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n"); if (pch_iir & SDE_POISON) DRM_ERROR("PCH poison interrupt\n"); if (pch_iir & SDE_FDI_MASK) for_each_pipe(pipe) DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n", pipe_name(pipe), I915_READ(FDI_RX_IIR(pipe))); if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE)) DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n"); if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR)) DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n"); if (pch_iir & SDE_TRANSB_FIFO_UNDER) DRM_DEBUG_DRIVER("PCH transcoder B underrun interrupt\n"); if (pch_iir & SDE_TRANSA_FIFO_UNDER) DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n"); } static irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS) { struct drm_device *dev = (struct drm_device *) arg; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int ret = IRQ_NONE; u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir; struct drm_i915_master_private *master_priv; atomic_inc(&dev_priv->irq_received); /* disable master interrupt before clearing iir */ de_ier = I915_READ(DEIER); I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); POSTING_READ(DEIER); de_iir = I915_READ(DEIIR); gt_iir = I915_READ(GTIIR); pch_iir = I915_READ(SDEIIR); pm_iir = I915_READ(GEN6_PMIIR); if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 && pm_iir == 0) goto done; ret = IRQ_HANDLED; if (dev->primary->master) { master_priv = dev->primary->master->driver_priv; if (master_priv->sarea_priv) master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); } if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY)) notify_ring(dev, &dev_priv->ring[RCS]); if (gt_iir & GT_GEN6_BSD_USER_INTERRUPT) notify_ring(dev, &dev_priv->ring[VCS]); if (gt_iir & GT_BLT_USER_INTERRUPT) notify_ring(dev, &dev_priv->ring[BCS]); if (de_iir & DE_GSE_IVB) intel_opregion_gse_intr(dev); if (de_iir & DE_PLANEA_FLIP_DONE_IVB) { intel_prepare_page_flip(dev, 0); intel_finish_page_flip_plane(dev, 0); } if (de_iir & DE_PLANEB_FLIP_DONE_IVB) { intel_prepare_page_flip(dev, 1); intel_finish_page_flip_plane(dev, 1); } if (de_iir & DE_PIPEA_VBLANK_IVB) drm_handle_vblank(dev, 0); if (de_iir & DE_PIPEB_VBLANK_IVB) drm_handle_vblank(dev, 1); /* check event from PCH */ if (de_iir & DE_PCH_EVENT_IVB) { if (pch_iir & SDE_HOTPLUG_MASK_CPT) queue_work(dev_priv->wq, &dev_priv->hotplug_work); pch_irq_handler(dev); } if (pm_iir & GEN6_PM_DEFERRED_EVENTS) { unsigned long flags; spin_lock_irqsave(&dev_priv->rps_lock, flags); WARN(dev_priv->pm_iir & pm_iir, "Missed a PM interrupt\n"); I915_WRITE(GEN6_PMIMR, pm_iir); dev_priv->pm_iir |= pm_iir; spin_unlock_irqrestore(&dev_priv->rps_lock, flags); queue_work(dev_priv->wq, &dev_priv->rps_work); } /* should clear PCH hotplug event before clear CPU irq */ I915_WRITE(SDEIIR, pch_iir); I915_WRITE(GTIIR, gt_iir); I915_WRITE(DEIIR, de_iir); I915_WRITE(GEN6_PMIIR, pm_iir); done: I915_WRITE(DEIER, de_ier); POSTING_READ(DEIER); return ret; } static irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS) { struct drm_device *dev = (struct drm_device *) arg; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int ret = IRQ_NONE; u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir; u32 hotplug_mask; struct drm_i915_master_private *master_priv; u32 bsd_usr_interrupt = GT_BSD_USER_INTERRUPT; atomic_inc(&dev_priv->irq_received); if (IS_GEN6(dev)) bsd_usr_interrupt = GT_GEN6_BSD_USER_INTERRUPT; /* disable master interrupt before clearing iir */ de_ier = I915_READ(DEIER); I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); POSTING_READ(DEIER); de_iir = I915_READ(DEIIR); gt_iir = I915_READ(GTIIR); pch_iir = I915_READ(SDEIIR); pm_iir = I915_READ(GEN6_PMIIR); if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 && (!IS_GEN6(dev) || pm_iir == 0)) goto done; if (HAS_PCH_CPT(dev)) hotplug_mask = SDE_HOTPLUG_MASK_CPT; else hotplug_mask = SDE_HOTPLUG_MASK; ret = IRQ_HANDLED; if (dev->primary->master) { master_priv = dev->primary->master->driver_priv; if (master_priv->sarea_priv) master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); } if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY)) notify_ring(dev, &dev_priv->ring[RCS]); if (gt_iir & bsd_usr_interrupt) notify_ring(dev, &dev_priv->ring[VCS]); if (gt_iir & GT_BLT_USER_INTERRUPT) notify_ring(dev, &dev_priv->ring[BCS]); if (de_iir & DE_GSE) intel_opregion_gse_intr(dev); if (de_iir & DE_PLANEA_FLIP_DONE) { intel_prepare_page_flip(dev, 0); intel_finish_page_flip_plane(dev, 0); } if (de_iir & DE_PLANEB_FLIP_DONE) { intel_prepare_page_flip(dev, 1); intel_finish_page_flip_plane(dev, 1); } if (de_iir & DE_PIPEA_VBLANK) drm_handle_vblank(dev, 0); if (de_iir & DE_PIPEB_VBLANK) drm_handle_vblank(dev, 1); /* check event from PCH */ if (de_iir & DE_PCH_EVENT) { if (pch_iir & hotplug_mask) queue_work(dev_priv->wq, &dev_priv->hotplug_work); pch_irq_handler(dev); } if (de_iir & DE_PCU_EVENT) { I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS)); i915_handle_rps_change(dev); } if (IS_GEN6(dev) && pm_iir & GEN6_PM_DEFERRED_EVENTS) { /* * IIR bits should never already be set because IMR should * prevent an interrupt from being shown in IIR. The warning * displays a case where we've unsafely cleared * dev_priv->pm_iir. Although missing an interrupt of the same * type is not a problem, it displays a problem in the logic. * * The mask bit in IMR is cleared by rps_work. */ unsigned long flags; spin_lock_irqsave(&dev_priv->rps_lock, flags); WARN(dev_priv->pm_iir & pm_iir, "Missed a PM interrupt\n"); I915_WRITE(GEN6_PMIMR, pm_iir); dev_priv->pm_iir |= pm_iir; spin_unlock_irqrestore(&dev_priv->rps_lock, flags); queue_work(dev_priv->wq, &dev_priv->rps_work); } /* should clear PCH hotplug event before clear CPU irq */ I915_WRITE(SDEIIR, pch_iir); I915_WRITE(GTIIR, gt_iir); I915_WRITE(DEIIR, de_iir); I915_WRITE(GEN6_PMIIR, pm_iir); done: I915_WRITE(DEIER, de_ier); POSTING_READ(DEIER); return ret; } /** * i915_error_work_func - do process context error handling work * @work: work struct * * Fire an error uevent so userspace can see that a hang or error * was detected. */ static void i915_error_work_func(struct work_struct *work) { drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, error_work); struct drm_device *dev = dev_priv->dev; char *error_event[] = { "ERROR=1", NULL }; char *reset_event[] = { "RESET=1", NULL }; char *reset_done_event[] = { "ERROR=0", NULL }; kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event); if (atomic_read(&dev_priv->mm.wedged)) { DRM_DEBUG_DRIVER("resetting chip\n"); kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event); if (!i915_reset(dev, GRDOM_RENDER)) { atomic_set(&dev_priv->mm.wedged, 0); kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event); } complete_all(&dev_priv->error_completion); } } #ifdef CONFIG_DEBUG_FS static struct drm_i915_error_object * i915_error_object_create(struct drm_i915_private *dev_priv, struct drm_i915_gem_object *src) { struct drm_i915_error_object *dst; int page, page_count; u32 reloc_offset; if (src == NULL || src->pages == NULL) return NULL; page_count = src->base.size / PAGE_SIZE; dst = kmalloc(sizeof(*dst) + page_count * sizeof (u32 *), GFP_ATOMIC); if (dst == NULL) return NULL; reloc_offset = src->gtt_offset; for (page = 0; page < page_count; page++) { unsigned long flags; void __iomem *s; void *d; d = kmalloc(PAGE_SIZE, GFP_ATOMIC); if (d == NULL) goto unwind; local_irq_save(flags); s = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping, reloc_offset); memcpy_fromio(d, s, PAGE_SIZE); io_mapping_unmap_atomic(s); local_irq_restore(flags); dst->pages[page] = d; reloc_offset += PAGE_SIZE; } dst->page_count = page_count; dst->gtt_offset = src->gtt_offset; return dst; unwind: while (page--) kfree(dst->pages[page]); kfree(dst); return NULL; } static void i915_error_object_free(struct drm_i915_error_object *obj) { int page; if (obj == NULL) return; for (page = 0; page < obj->page_count; page++) kfree(obj->pages[page]); kfree(obj); } static void i915_error_state_free(struct drm_device *dev, struct drm_i915_error_state *error) { int i; for (i = 0; i < ARRAY_SIZE(error->batchbuffer); i++) i915_error_object_free(error->batchbuffer[i]); for (i = 0; i < ARRAY_SIZE(error->ringbuffer); i++) i915_error_object_free(error->ringbuffer[i]); kfree(error->active_bo); kfree(error->overlay); kfree(error); } static u32 capture_bo_list(struct drm_i915_error_buffer *err, int count, struct list_head *head) { struct drm_i915_gem_object *obj; int i = 0; list_for_each_entry(obj, head, mm_list) { err->size = obj->base.size; err->name = obj->base.name; err->seqno = obj->last_rendering_seqno; err->gtt_offset = obj->gtt_offset; err->read_domains = obj->base.read_domains; err->write_domain = obj->base.write_domain; err->fence_reg = obj->fence_reg; err->pinned = 0; if (obj->pin_count > 0) err->pinned = 1; if (obj->user_pin_count > 0) err->pinned = -1; err->tiling = obj->tiling_mode; err->dirty = obj->dirty; err->purgeable = obj->madv != I915_MADV_WILLNEED; err->ring = obj->ring ? obj->ring->id : 0; err->cache_level = obj->cache_level; if (++i == count) break; err++; } return i; } static void i915_gem_record_fences(struct drm_device *dev, struct drm_i915_error_state *error) { struct drm_i915_private *dev_priv = dev->dev_private; int i; /* Fences */ switch (INTEL_INFO(dev)->gen) { case 6: for (i = 0; i < 16; i++) error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8)); break; case 5: case 4: for (i = 0; i < 16; i++) error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8)); break; case 3: if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) for (i = 0; i < 8; i++) error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4)); case 2: for (i = 0; i < 8; i++) error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4)); break; } } static struct drm_i915_error_object * i915_error_first_batchbuffer(struct drm_i915_private *dev_priv, struct intel_ring_buffer *ring) { struct drm_i915_gem_object *obj; u32 seqno; if (!ring->get_seqno) return NULL; seqno = ring->get_seqno(ring); list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) { if (obj->ring != ring) continue; if (i915_seqno_passed(seqno, obj->last_rendering_seqno)) continue; if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0) continue; /* We need to copy these to an anonymous buffer as the simplest * method to avoid being overwritten by userspace. */ return i915_error_object_create(dev_priv, obj); } return NULL; } /** * i915_capture_error_state - capture an error record for later analysis * @dev: drm device * * Should be called when an error is detected (either a hang or an error * interrupt) to capture error state from the time of the error. Fills * out a structure which becomes available in debugfs for user level tools * to pick up. */ static void i915_capture_error_state(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_gem_object *obj; struct drm_i915_error_state *error; unsigned long flags; int i, pipe; spin_lock_irqsave(&dev_priv->error_lock, flags); error = dev_priv->first_error; spin_unlock_irqrestore(&dev_priv->error_lock, flags); if (error) return; /* Account for pipe specific data like PIPE*STAT */ error = kmalloc(sizeof(*error), GFP_ATOMIC); if (!error) { DRM_DEBUG_DRIVER("out of memory, not capturing error state\n"); return; } DRM_INFO("capturing error event; look for more information in /debug/dri/%d/i915_error_state\n", dev->primary->index); error->seqno = dev_priv->ring[RCS].get_seqno(&dev_priv->ring[RCS]); error->eir = I915_READ(EIR); error->pgtbl_er = I915_READ(PGTBL_ER); for_each_pipe(pipe) error->pipestat[pipe] = I915_READ(PIPESTAT(pipe)); error->instpm = I915_READ(INSTPM); error->error = 0; if (INTEL_INFO(dev)->gen >= 6) { error->error = I915_READ(ERROR_GEN6); error->bcs_acthd = I915_READ(BCS_ACTHD); error->bcs_ipehr = I915_READ(BCS_IPEHR); error->bcs_ipeir = I915_READ(BCS_IPEIR); error->bcs_instdone = I915_READ(BCS_INSTDONE); error->bcs_seqno = 0; if (dev_priv->ring[BCS].get_seqno) error->bcs_seqno = dev_priv->ring[BCS].get_seqno(&dev_priv->ring[BCS]); error->vcs_acthd = I915_READ(VCS_ACTHD); error->vcs_ipehr = I915_READ(VCS_IPEHR); error->vcs_ipeir = I915_READ(VCS_IPEIR); error->vcs_instdone = I915_READ(VCS_INSTDONE); error->vcs_seqno = 0; if (dev_priv->ring[VCS].get_seqno) error->vcs_seqno = dev_priv->ring[VCS].get_seqno(&dev_priv->ring[VCS]); } if (INTEL_INFO(dev)->gen >= 4) { error->ipeir = I915_READ(IPEIR_I965); error->ipehr = I915_READ(IPEHR_I965); error->instdone = I915_READ(INSTDONE_I965); error->instps = I915_READ(INSTPS); error->instdone1 = I915_READ(INSTDONE1); error->acthd = I915_READ(ACTHD_I965); error->bbaddr = I915_READ64(BB_ADDR); } else { error->ipeir = I915_READ(IPEIR); error->ipehr = I915_READ(IPEHR); error->instdone = I915_READ(INSTDONE); error->acthd = I915_READ(ACTHD); error->bbaddr = 0; } i915_gem_record_fences(dev, error); /* Record the active batch and ring buffers */ for (i = 0; i < I915_NUM_RINGS; i++) { error->batchbuffer[i] = i915_error_first_batchbuffer(dev_priv, &dev_priv->ring[i]); error->ringbuffer[i] = i915_error_object_create(dev_priv, dev_priv->ring[i].obj); } /* Record buffers on the active and pinned lists. */ error->active_bo = NULL; error->pinned_bo = NULL; i = 0; list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) i++; error->active_bo_count = i; list_for_each_entry(obj, &dev_priv->mm.pinned_list, mm_list) i++; error->pinned_bo_count = i - error->active_bo_count; error->active_bo = NULL; error->pinned_bo = NULL; if (i) { error->active_bo = kmalloc(sizeof(*error->active_bo)*i, GFP_ATOMIC); if (error->active_bo) error->pinned_bo = error->active_bo + error->active_bo_count; } if (error->active_bo) error->active_bo_count = capture_bo_list(error->active_bo, error->active_bo_count, &dev_priv->mm.active_list); if (error->pinned_bo) error->pinned_bo_count = capture_bo_list(error->pinned_bo, error->pinned_bo_count, &dev_priv->mm.pinned_list); do_gettimeofday(&error->time); error->overlay = intel_overlay_capture_error_state(dev); error->display = intel_display_capture_error_state(dev); spin_lock_irqsave(&dev_priv->error_lock, flags); if (dev_priv->first_error == NULL) { dev_priv->first_error = error; error = NULL; } spin_unlock_irqrestore(&dev_priv->error_lock, flags); if (error) i915_error_state_free(dev, error); } void i915_destroy_error_state(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_error_state *error; spin_lock(&dev_priv->error_lock); error = dev_priv->first_error; dev_priv->first_error = NULL; spin_unlock(&dev_priv->error_lock); if (error) i915_error_state_free(dev, error); } #else #define i915_capture_error_state(x) #endif static void i915_report_and_clear_eir(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 eir = I915_READ(EIR); int pipe; if (!eir) return; printk(KERN_ERR "render error detected, EIR: 0x%08x\n", eir); if (IS_G4X(dev)) { if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) { u32 ipeir = I915_READ(IPEIR_I965); printk(KERN_ERR " IPEIR: 0x%08x\n", I915_READ(IPEIR_I965)); printk(KERN_ERR " IPEHR: 0x%08x\n", I915_READ(IPEHR_I965)); printk(KERN_ERR " INSTDONE: 0x%08x\n", I915_READ(INSTDONE_I965)); printk(KERN_ERR " INSTPS: 0x%08x\n", I915_READ(INSTPS)); printk(KERN_ERR " INSTDONE1: 0x%08x\n", I915_READ(INSTDONE1)); printk(KERN_ERR " ACTHD: 0x%08x\n", I915_READ(ACTHD_I965)); I915_WRITE(IPEIR_I965, ipeir); POSTING_READ(IPEIR_I965); } if (eir & GM45_ERROR_PAGE_TABLE) { u32 pgtbl_err = I915_READ(PGTBL_ER); printk(KERN_ERR "page table error\n"); printk(KERN_ERR " PGTBL_ER: 0x%08x\n", pgtbl_err); I915_WRITE(PGTBL_ER, pgtbl_err); POSTING_READ(PGTBL_ER); } } if (!IS_GEN2(dev)) { if (eir & I915_ERROR_PAGE_TABLE) { u32 pgtbl_err = I915_READ(PGTBL_ER); printk(KERN_ERR "page table error\n"); printk(KERN_ERR " PGTBL_ER: 0x%08x\n", pgtbl_err); I915_WRITE(PGTBL_ER, pgtbl_err); POSTING_READ(PGTBL_ER); } } if (eir & I915_ERROR_MEMORY_REFRESH) { printk(KERN_ERR "memory refresh error:\n"); for_each_pipe(pipe) printk(KERN_ERR "pipe %c stat: 0x%08x\n", pipe_name(pipe), I915_READ(PIPESTAT(pipe))); /* pipestat has already been acked */ } if (eir & I915_ERROR_INSTRUCTION) { printk(KERN_ERR "instruction error\n"); printk(KERN_ERR " INSTPM: 0x%08x\n", I915_READ(INSTPM)); if (INTEL_INFO(dev)->gen < 4) { u32 ipeir = I915_READ(IPEIR); printk(KERN_ERR " IPEIR: 0x%08x\n", I915_READ(IPEIR)); printk(KERN_ERR " IPEHR: 0x%08x\n", I915_READ(IPEHR)); printk(KERN_ERR " INSTDONE: 0x%08x\n", I915_READ(INSTDONE)); printk(KERN_ERR " ACTHD: 0x%08x\n", I915_READ(ACTHD)); I915_WRITE(IPEIR, ipeir); POSTING_READ(IPEIR); } else { u32 ipeir = I915_READ(IPEIR_I965); printk(KERN_ERR " IPEIR: 0x%08x\n", I915_READ(IPEIR_I965)); printk(KERN_ERR " IPEHR: 0x%08x\n", I915_READ(IPEHR_I965)); printk(KERN_ERR " INSTDONE: 0x%08x\n", I915_READ(INSTDONE_I965)); printk(KERN_ERR " INSTPS: 0x%08x\n", I915_READ(INSTPS)); printk(KERN_ERR " INSTDONE1: 0x%08x\n", I915_READ(INSTDONE1)); printk(KERN_ERR " ACTHD: 0x%08x\n", I915_READ(ACTHD_I965)); I915_WRITE(IPEIR_I965, ipeir); POSTING_READ(IPEIR_I965); } } I915_WRITE(EIR, eir); POSTING_READ(EIR); eir = I915_READ(EIR); if (eir) { /* * some errors might have become stuck, * mask them. */ DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir); I915_WRITE(EMR, I915_READ(EMR) | eir); I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); } } /** * i915_handle_error - handle an error interrupt * @dev: drm device * * Do some basic checking of regsiter state at error interrupt time and * dump it to the syslog. Also call i915_capture_error_state() to make * sure we get a record and make it available in debugfs. Fire a uevent * so userspace knows something bad happened (should trigger collection * of a ring dump etc.). */ void i915_handle_error(struct drm_device *dev, bool wedged) { struct drm_i915_private *dev_priv = dev->dev_private; i915_capture_error_state(dev); i915_report_and_clear_eir(dev); if (wedged) { INIT_COMPLETION(dev_priv->error_completion); atomic_set(&dev_priv->mm.wedged, 1); /* * Wakeup waiting processes so they don't hang */ wake_up_all(&dev_priv->ring[RCS].irq_queue); if (HAS_BSD(dev)) wake_up_all(&dev_priv->ring[VCS].irq_queue); if (HAS_BLT(dev)) wake_up_all(&dev_priv->ring[BCS].irq_queue); } queue_work(dev_priv->wq, &dev_priv->error_work); } static void i915_pageflip_stall_check(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = dev->dev_private; struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct drm_i915_gem_object *obj; struct intel_unpin_work *work; unsigned long flags; bool stall_detected; /* Ignore early vblank irqs */ if (intel_crtc == NULL) return; spin_lock_irqsave(&dev->event_lock, flags); work = intel_crtc->unpin_work; if (work == NULL || work->pending || !work->enable_stall_check) { /* Either the pending flip IRQ arrived, or we're too early. Don't check */ spin_unlock_irqrestore(&dev->event_lock, flags); return; } /* Potential stall - if we see that the flip has happened, assume a missed interrupt */ obj = work->pending_flip_obj; if (INTEL_INFO(dev)->gen >= 4) { int dspsurf = DSPSURF(intel_crtc->plane); stall_detected = I915_READ(dspsurf) == obj->gtt_offset; } else { int dspaddr = DSPADDR(intel_crtc->plane); stall_detected = I915_READ(dspaddr) == (obj->gtt_offset + crtc->y * crtc->fb->pitch + crtc->x * crtc->fb->bits_per_pixel/8); } spin_unlock_irqrestore(&dev->event_lock, flags); if (stall_detected) { DRM_DEBUG_DRIVER("Pageflip stall detected\n"); intel_prepare_page_flip(dev, intel_crtc->plane); } } static irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) { struct drm_device *dev = (struct drm_device *) arg; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; struct drm_i915_master_private *master_priv; u32 iir, new_iir; u32 pipe_stats[I915_MAX_PIPES]; u32 vblank_status; int vblank = 0; unsigned long irqflags; int irq_received; int ret = IRQ_NONE, pipe; bool blc_event = false; atomic_inc(&dev_priv->irq_received); iir = I915_READ(IIR); if (INTEL_INFO(dev)->gen >= 4) vblank_status = PIPE_START_VBLANK_INTERRUPT_STATUS; else vblank_status = PIPE_VBLANK_INTERRUPT_STATUS; for (;;) { irq_received = iir != 0; /* Can't rely on pipestat interrupt bit in iir as it might * have been cleared after the pipestat interrupt was received. * It doesn't set the bit in iir again, but it still produces * interrupts (for non-MSI). */ spin_lock_irqsave(&dev_priv->irq_lock, irqflags); if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) i915_handle_error(dev, false); for_each_pipe(pipe) { int reg = PIPESTAT(pipe); pipe_stats[pipe] = I915_READ(reg); /* * Clear the PIPE*STAT regs before the IIR */ if (pipe_stats[pipe] & 0x8000ffff) { if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS) DRM_DEBUG_DRIVER("pipe %c underrun\n", pipe_name(pipe)); I915_WRITE(reg, pipe_stats[pipe]); irq_received = 1; } } spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); if (!irq_received) break; ret = IRQ_HANDLED; /* Consume port. Then clear IIR or we'll miss events */ if ((I915_HAS_HOTPLUG(dev)) && (iir & I915_DISPLAY_PORT_INTERRUPT)) { u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n", hotplug_status); if (hotplug_status & dev_priv->hotplug_supported_mask) queue_work(dev_priv->wq, &dev_priv->hotplug_work); I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); I915_READ(PORT_HOTPLUG_STAT); } I915_WRITE(IIR, iir); new_iir = I915_READ(IIR); /* Flush posted writes */ if (dev->primary->master) { master_priv = dev->primary->master->driver_priv; if (master_priv->sarea_priv) master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); } if (iir & I915_USER_INTERRUPT) notify_ring(dev, &dev_priv->ring[RCS]); if (iir & I915_BSD_USER_INTERRUPT) notify_ring(dev, &dev_priv->ring[VCS]); if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) { intel_prepare_page_flip(dev, 0); if (dev_priv->flip_pending_is_done) intel_finish_page_flip_plane(dev, 0); } if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) { intel_prepare_page_flip(dev, 1); if (dev_priv->flip_pending_is_done) intel_finish_page_flip_plane(dev, 1); } for_each_pipe(pipe) { if (pipe_stats[pipe] & vblank_status && drm_handle_vblank(dev, pipe)) { vblank++; if (!dev_priv->flip_pending_is_done) { i915_pageflip_stall_check(dev, pipe); intel_finish_page_flip(dev, pipe); } } if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS) blc_event = true; } if (blc_event || (iir & I915_ASLE_INTERRUPT)) intel_opregion_asle_intr(dev); /* With MSI, interrupts are only generated when iir * transitions from zero to nonzero. If another bit got * set while we were handling the existing iir bits, then * we would never get another interrupt. * * This is fine on non-MSI as well, as if we hit this path * we avoid exiting the interrupt handler only to generate * another one. * * Note that for MSI this could cause a stray interrupt report * if an interrupt landed in the time between writing IIR and * the posting read. This should be rare enough to never * trigger the 99% of 100,000 interrupts test for disabling * stray interrupts. */ iir = new_iir; } return ret; } static int i915_emit_irq(struct drm_device * dev) { drm_i915_private_t *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; i915_kernel_lost_context(dev); DRM_DEBUG_DRIVER("\n"); dev_priv->counter++; if (dev_priv->counter > 0x7FFFFFFFUL) dev_priv->counter = 1; if (master_priv->sarea_priv) master_priv->sarea_priv->last_enqueue = dev_priv->counter; if (BEGIN_LP_RING(4) == 0) { OUT_RING(MI_STORE_DWORD_INDEX); OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); OUT_RING(dev_priv->counter); OUT_RING(MI_USER_INTERRUPT); ADVANCE_LP_RING(); } return dev_priv->counter; } static int i915_wait_irq(struct drm_device * dev, int irq_nr) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; int ret = 0; struct intel_ring_buffer *ring = LP_RING(dev_priv); DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr, READ_BREADCRUMB(dev_priv)); if (READ_BREADCRUMB(dev_priv) >= irq_nr) { if (master_priv->sarea_priv) master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); return 0; } if (master_priv->sarea_priv) master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; if (ring->irq_get(ring)) { DRM_WAIT_ON(ret, ring->irq_queue, 3 * DRM_HZ, READ_BREADCRUMB(dev_priv) >= irq_nr); ring->irq_put(ring); } else if (wait_for(READ_BREADCRUMB(dev_priv) >= irq_nr, 3000)) ret = -EBUSY; if (ret == -EBUSY) { DRM_ERROR("EBUSY -- rec: %d emitted: %d\n", READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); } return ret; } /* Needs the lock as it touches the ring. */ int i915_irq_emit(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_i915_private_t *dev_priv = dev->dev_private; drm_i915_irq_emit_t *emit = data; int result; if (!dev_priv || !LP_RING(dev_priv)->virtual_start) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } RING_LOCK_TEST_WITH_RETURN(dev, file_priv); mutex_lock(&dev->struct_mutex); result = i915_emit_irq(dev); mutex_unlock(&dev->struct_mutex); if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) { DRM_ERROR("copy_to_user\n"); return -EFAULT; } return 0; } /* Doesn't need the hardware lock. */ int i915_irq_wait(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_i915_private_t *dev_priv = dev->dev_private; drm_i915_irq_wait_t *irqwait = data; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } return i915_wait_irq(dev, irqwait->irq_seq); } /* Called from drm generic code, passed 'crtc' which * we use as a pipe index */ static int i915_enable_vblank(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; if (!i915_pipe_enabled(dev, pipe)) return -EINVAL; spin_lock_irqsave(&dev_priv->irq_lock, irqflags); if (INTEL_INFO(dev)->gen >= 4) i915_enable_pipestat(dev_priv, pipe, PIPE_START_VBLANK_INTERRUPT_ENABLE); else i915_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE); /* maintain vblank delivery even in deep C-states */ if (dev_priv->info->gen == 3) I915_WRITE(INSTPM, INSTPM_AGPBUSY_DIS << 16); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); return 0; } static int ironlake_enable_vblank(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; if (!i915_pipe_enabled(dev, pipe)) return -EINVAL; spin_lock_irqsave(&dev_priv->irq_lock, irqflags); ironlake_enable_display_irq(dev_priv, (pipe == 0) ? DE_PIPEA_VBLANK: DE_PIPEB_VBLANK); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); return 0; } static int ivybridge_enable_vblank(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; if (!i915_pipe_enabled(dev, pipe)) return -EINVAL; spin_lock_irqsave(&dev_priv->irq_lock, irqflags); ironlake_enable_display_irq(dev_priv, (pipe == 0) ? DE_PIPEA_VBLANK_IVB : DE_PIPEB_VBLANK_IVB); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); return 0; } /* Called from drm generic code, passed 'crtc' which * we use as a pipe index */ static void i915_disable_vblank(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; spin_lock_irqsave(&dev_priv->irq_lock, irqflags); if (dev_priv->info->gen == 3) I915_WRITE(INSTPM, INSTPM_AGPBUSY_DIS << 16 | INSTPM_AGPBUSY_DIS); i915_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE | PIPE_START_VBLANK_INTERRUPT_ENABLE); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); } static void ironlake_disable_vblank(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; spin_lock_irqsave(&dev_priv->irq_lock, irqflags); ironlake_disable_display_irq(dev_priv, (pipe == 0) ? DE_PIPEA_VBLANK: DE_PIPEB_VBLANK); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); } static void ivybridge_disable_vblank(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; spin_lock_irqsave(&dev_priv->irq_lock, irqflags); ironlake_disable_display_irq(dev_priv, (pipe == 0) ? DE_PIPEA_VBLANK_IVB : DE_PIPEB_VBLANK_IVB); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); } /* Set the vblank monitor pipe */ int i915_vblank_pipe_set(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_i915_private_t *dev_priv = dev->dev_private; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } return 0; } int i915_vblank_pipe_get(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_i915_private_t *dev_priv = dev->dev_private; drm_i915_vblank_pipe_t *pipe = data; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; return 0; } /** * Schedule buffer swap at given vertical blank. */ int i915_vblank_swap(struct drm_device *dev, void *data, struct drm_file *file_priv) { /* The delayed swap mechanism was fundamentally racy, and has been * removed. The model was that the client requested a delayed flip/swap * from the kernel, then waited for vblank before continuing to perform * rendering. The problem was that the kernel might wake the client * up before it dispatched the vblank swap (since the lock has to be * held while touching the ringbuffer), in which case the client would * clear and start the next frame before the swap occurred, and * flicker would occur in addition to likely missing the vblank. * * In the absence of this ioctl, userland falls back to a correct path * of waiting for a vblank, then dispatching the swap on its own. * Context switching to userland and back is plenty fast enough for * meeting the requirements of vblank swapping. */ return -EINVAL; } static u32 ring_last_seqno(struct intel_ring_buffer *ring) { return list_entry(ring->request_list.prev, struct drm_i915_gem_request, list)->seqno; } static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring, bool *err) { if (list_empty(&ring->request_list) || i915_seqno_passed(ring->get_seqno(ring), ring_last_seqno(ring))) { /* Issue a wake-up to catch stuck h/w. */ if (ring->waiting_seqno && waitqueue_active(&ring->irq_queue)) { DRM_ERROR("Hangcheck timer elapsed... %s idle [waiting on %d, at %d], missed IRQ?\n", ring->name, ring->waiting_seqno, ring->get_seqno(ring)); wake_up_all(&ring->irq_queue); *err = true; } return true; } return false; } static bool kick_ring(struct intel_ring_buffer *ring) { struct drm_device *dev = ring->dev; struct drm_i915_private *dev_priv = dev->dev_private; u32 tmp = I915_READ_CTL(ring); if (tmp & RING_WAIT) { DRM_ERROR("Kicking stuck wait on %s\n", ring->name); I915_WRITE_CTL(ring, tmp); return true; } if (IS_GEN6(dev) && (tmp & RING_WAIT_SEMAPHORE)) { DRM_ERROR("Kicking stuck semaphore on %s\n", ring->name); I915_WRITE_CTL(ring, tmp); return true; } return false; } /** * This is called when the chip hasn't reported back with completed * batchbuffers in a long time. The first time this is called we simply record * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses * again, we assume the chip is wedged and try to fix it. */ void i915_hangcheck_elapsed(unsigned long data) { struct drm_device *dev = (struct drm_device *)data; drm_i915_private_t *dev_priv = dev->dev_private; uint32_t acthd, instdone, instdone1; bool err = false; /* If all work is done then ACTHD clearly hasn't advanced. */ if (i915_hangcheck_ring_idle(&dev_priv->ring[RCS], &err) && i915_hangcheck_ring_idle(&dev_priv->ring[VCS], &err) && i915_hangcheck_ring_idle(&dev_priv->ring[BCS], &err)) { dev_priv->hangcheck_count = 0; if (err) goto repeat; return; } if (INTEL_INFO(dev)->gen < 4) { acthd = I915_READ(ACTHD); instdone = I915_READ(INSTDONE); instdone1 = 0; } else { acthd = I915_READ(ACTHD_I965); instdone = I915_READ(INSTDONE_I965); instdone1 = I915_READ(INSTDONE1); } if (dev_priv->last_acthd == acthd && dev_priv->last_instdone == instdone && dev_priv->last_instdone1 == instdone1) { if (dev_priv->hangcheck_count++ > 1) { DRM_ERROR("Hangcheck timer elapsed... GPU hung\n"); if (!IS_GEN2(dev)) { /* Is the chip hanging on a WAIT_FOR_EVENT? * If so we can simply poke the RB_WAIT bit * and break the hang. This should work on * all but the second generation chipsets. */ if (kick_ring(&dev_priv->ring[RCS])) goto repeat; if (HAS_BSD(dev) && kick_ring(&dev_priv->ring[VCS])) goto repeat; if (HAS_BLT(dev) && kick_ring(&dev_priv->ring[BCS])) goto repeat; } i915_handle_error(dev, true); return; } } else { dev_priv->hangcheck_count = 0; dev_priv->last_acthd = acthd; dev_priv->last_instdone = instdone; dev_priv->last_instdone1 = instdone1; } repeat: /* Reset timer case chip hangs without another request being added */ mod_timer(&dev_priv->hangcheck_timer, jiffies + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD)); } /* drm_dma.h hooks */ static void ironlake_irq_preinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; atomic_set(&dev_priv->irq_received, 0); INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func); INIT_WORK(&dev_priv->error_work, i915_error_work_func); if (IS_GEN6(dev) || IS_IVYBRIDGE(dev)) INIT_WORK(&dev_priv->rps_work, gen6_pm_rps_work); I915_WRITE(HWSTAM, 0xeffe); if (IS_GEN6(dev) || IS_GEN7(dev)) { /* Workaround stalls observed on Sandy Bridge GPUs by * making the blitter command streamer generate a * write to the Hardware Status Page for * MI_USER_INTERRUPT. This appears to serialize the * previous seqno write out before the interrupt * happens. */ I915_WRITE(GEN6_BLITTER_HWSTAM, ~GEN6_BLITTER_USER_INTERRUPT); I915_WRITE(GEN6_BSD_HWSTAM, ~GEN6_BSD_USER_INTERRUPT); } /* XXX hotplug from PCH */ I915_WRITE(DEIMR, 0xffffffff); I915_WRITE(DEIER, 0x0); POSTING_READ(DEIER); /* and GT */ I915_WRITE(GTIMR, 0xffffffff); I915_WRITE(GTIER, 0x0); POSTING_READ(GTIER); /* south display irq */ I915_WRITE(SDEIMR, 0xffffffff); I915_WRITE(SDEIER, 0x0); POSTING_READ(SDEIER); } static int ironlake_irq_postinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; /* enable kind of interrupts always enabled */ u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT | DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE; u32 render_irqs; u32 hotplug_mask; DRM_INIT_WAITQUEUE(&dev_priv->ring[RCS].irq_queue); if (HAS_BSD(dev)) DRM_INIT_WAITQUEUE(&dev_priv->ring[VCS].irq_queue); if (HAS_BLT(dev)) DRM_INIT_WAITQUEUE(&dev_priv->ring[BCS].irq_queue); dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; dev_priv->irq_mask = ~display_mask; /* should always can generate irq */ I915_WRITE(DEIIR, I915_READ(DEIIR)); I915_WRITE(DEIMR, dev_priv->irq_mask); I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK); POSTING_READ(DEIER); dev_priv->gt_irq_mask = ~0; I915_WRITE(GTIIR, I915_READ(GTIIR)); I915_WRITE(GTIMR, dev_priv->gt_irq_mask); if (IS_GEN6(dev)) render_irqs = GT_USER_INTERRUPT | GT_GEN6_BSD_USER_INTERRUPT | GT_BLT_USER_INTERRUPT; else render_irqs = GT_USER_INTERRUPT | GT_PIPE_NOTIFY | GT_BSD_USER_INTERRUPT; I915_WRITE(GTIER, render_irqs); POSTING_READ(GTIER); if (HAS_PCH_CPT(dev)) { hotplug_mask = (SDE_CRT_HOTPLUG_CPT | SDE_PORTB_HOTPLUG_CPT | SDE_PORTC_HOTPLUG_CPT | SDE_PORTD_HOTPLUG_CPT); } else { hotplug_mask = (SDE_CRT_HOTPLUG | SDE_PORTB_HOTPLUG | SDE_PORTC_HOTPLUG | SDE_PORTD_HOTPLUG | SDE_AUX_MASK); } dev_priv->pch_irq_mask = ~hotplug_mask; I915_WRITE(SDEIIR, I915_READ(SDEIIR)); I915_WRITE(SDEIMR, dev_priv->pch_irq_mask); I915_WRITE(SDEIER, hotplug_mask); POSTING_READ(SDEIER); if (IS_IRONLAKE_M(dev)) { /* Clear & enable PCU event interrupts */ I915_WRITE(DEIIR, DE_PCU_EVENT); I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT); ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT); } return 0; } static int ivybridge_irq_postinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; /* enable kind of interrupts always enabled */ u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB | DE_PLANEA_FLIP_DONE_IVB | DE_PLANEB_FLIP_DONE_IVB; u32 render_irqs; u32 hotplug_mask; DRM_INIT_WAITQUEUE(&dev_priv->ring[RCS].irq_queue); if (HAS_BSD(dev)) DRM_INIT_WAITQUEUE(&dev_priv->ring[VCS].irq_queue); if (HAS_BLT(dev)) DRM_INIT_WAITQUEUE(&dev_priv->ring[BCS].irq_queue); dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; dev_priv->irq_mask = ~display_mask; /* should always can generate irq */ I915_WRITE(DEIIR, I915_READ(DEIIR)); I915_WRITE(DEIMR, dev_priv->irq_mask); I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK_IVB | DE_PIPEB_VBLANK_IVB); POSTING_READ(DEIER); dev_priv->gt_irq_mask = ~0; I915_WRITE(GTIIR, I915_READ(GTIIR)); I915_WRITE(GTIMR, dev_priv->gt_irq_mask); render_irqs = GT_USER_INTERRUPT | GT_GEN6_BSD_USER_INTERRUPT | GT_BLT_USER_INTERRUPT; I915_WRITE(GTIER, render_irqs); POSTING_READ(GTIER); hotplug_mask = (SDE_CRT_HOTPLUG_CPT | SDE_PORTB_HOTPLUG_CPT | SDE_PORTC_HOTPLUG_CPT | SDE_PORTD_HOTPLUG_CPT); dev_priv->pch_irq_mask = ~hotplug_mask; I915_WRITE(SDEIIR, I915_READ(SDEIIR)); I915_WRITE(SDEIMR, dev_priv->pch_irq_mask); I915_WRITE(SDEIER, hotplug_mask); POSTING_READ(SDEIER); return 0; } static void i915_driver_irq_preinstall(struct drm_device * dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int pipe; atomic_set(&dev_priv->irq_received, 0); INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func); INIT_WORK(&dev_priv->error_work, i915_error_work_func); if (I915_HAS_HOTPLUG(dev)) { I915_WRITE(PORT_HOTPLUG_EN, 0); I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); } I915_WRITE(HWSTAM, 0xeffe); for_each_pipe(pipe) I915_WRITE(PIPESTAT(pipe), 0); I915_WRITE(IMR, 0xffffffff); I915_WRITE(IER, 0x0); POSTING_READ(IER); } /* * Must be called after intel_modeset_init or hotplug interrupts won't be * enabled correctly. */ static int i915_driver_irq_postinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR; u32 error_mask; dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; /* Unmask the interrupts that we always want on. */ dev_priv->irq_mask = ~I915_INTERRUPT_ENABLE_FIX; dev_priv->pipestat[0] = 0; dev_priv->pipestat[1] = 0; if (I915_HAS_HOTPLUG(dev)) { /* Enable in IER... */ enable_mask |= I915_DISPLAY_PORT_INTERRUPT; /* and unmask in IMR */ dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT; } /* * Enable some error detection, note the instruction error mask * bit is reserved, so we leave it masked. */ if (IS_G4X(dev)) { error_mask = ~(GM45_ERROR_PAGE_TABLE | GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV | I915_ERROR_MEMORY_REFRESH); } else { error_mask = ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH); } I915_WRITE(EMR, error_mask); I915_WRITE(IMR, dev_priv->irq_mask); I915_WRITE(IER, enable_mask); POSTING_READ(IER); if (I915_HAS_HOTPLUG(dev)) { u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN); /* Note HDMI and DP share bits */ if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS) hotplug_en |= HDMIB_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS) hotplug_en |= HDMIC_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS) hotplug_en |= HDMID_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS) hotplug_en |= SDVOC_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS) hotplug_en |= SDVOB_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) { hotplug_en |= CRT_HOTPLUG_INT_EN; /* Programming the CRT detection parameters tends to generate a spurious hotplug event about three seconds later. So just do it once. */ if (IS_G4X(dev)) hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64; hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50; } /* Ignore TV since it's buggy */ I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); } intel_opregion_enable_asle(dev); return 0; } static void ironlake_irq_uninstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; if (!dev_priv) return; dev_priv->vblank_pipe = 0; I915_WRITE(HWSTAM, 0xffffffff); I915_WRITE(DEIMR, 0xffffffff); I915_WRITE(DEIER, 0x0); I915_WRITE(DEIIR, I915_READ(DEIIR)); I915_WRITE(GTIMR, 0xffffffff); I915_WRITE(GTIER, 0x0); I915_WRITE(GTIIR, I915_READ(GTIIR)); } static void i915_driver_irq_uninstall(struct drm_device * dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int pipe; if (!dev_priv) return; dev_priv->vblank_pipe = 0; if (I915_HAS_HOTPLUG(dev)) { I915_WRITE(PORT_HOTPLUG_EN, 0); I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); } I915_WRITE(HWSTAM, 0xffffffff); for_each_pipe(pipe) I915_WRITE(PIPESTAT(pipe), 0); I915_WRITE(IMR, 0xffffffff); I915_WRITE(IER, 0x0); for_each_pipe(pipe) I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)) & 0x8000ffff); I915_WRITE(IIR, I915_READ(IIR)); } void intel_irq_init(struct drm_device *dev) { dev->driver->get_vblank_counter = i915_get_vblank_counter; dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */ if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev) || IS_IVYBRIDGE(dev)) { dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */ dev->driver->get_vblank_counter = gm45_get_vblank_counter; } dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp; dev->driver->get_scanout_position = i915_get_crtc_scanoutpos; if (IS_IVYBRIDGE(dev)) { /* Share pre & uninstall handlers with ILK/SNB */ dev->driver->irq_handler = ivybridge_irq_handler; dev->driver->irq_preinstall = ironlake_irq_preinstall; dev->driver->irq_postinstall = ivybridge_irq_postinstall; dev->driver->irq_uninstall = ironlake_irq_uninstall; dev->driver->enable_vblank = ivybridge_enable_vblank; dev->driver->disable_vblank = ivybridge_disable_vblank; } else if (HAS_PCH_SPLIT(dev)) { dev->driver->irq_handler = ironlake_irq_handler; dev->driver->irq_preinstall = ironlake_irq_preinstall; dev->driver->irq_postinstall = ironlake_irq_postinstall; dev->driver->irq_uninstall = ironlake_irq_uninstall; dev->driver->enable_vblank = ironlake_enable_vblank; dev->driver->disable_vblank = ironlake_disable_vblank; } else { dev->driver->irq_preinstall = i915_driver_irq_preinstall; dev->driver->irq_postinstall = i915_driver_irq_postinstall; dev->driver->irq_uninstall = i915_driver_irq_uninstall; dev->driver->irq_handler = i915_driver_irq_handler; dev->driver->enable_vblank = i915_enable_vblank; dev->driver->disable_vblank = i915_disable_vblank; } }