/* $OpenBSD: i915_irq.c,v 1.26 2015/06/24 08:32:39 kettenis Exp $ */ /* 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. * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include "i915_drv.h" #include "i915_trace.h" #include "intel_drv.h" /* 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; /* FIXME: opregion/asle for VLV */ if (IS_VALLEYVIEW(dev)) return; 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; enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv, pipe); return I915_READ(PIPECONF(cpu_transcoder)) & 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; enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv, pipe); 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(cpu_transcoder)) >> 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(cpu_transcoder)) >> 16) & 0x1fff); *vpos = position / htotal; *hpos = position - (*vpos * htotal); } /* Query vblank area. */ vbl = I915_READ(VBLANK(cpu_transcoder)); /* 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_crtc *crtc; if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) { 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); } /* defined intel_pm.c */ extern spinlock_t mchdev_lock; static void ironlake_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; unsigned long flags; spin_lock_irqsave(&mchdev_lock, flags); I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS)); new_delay = dev_priv->ips.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->ips.cur_delay != dev_priv->ips.max_delay) new_delay = dev_priv->ips.cur_delay - 1; if (new_delay < dev_priv->ips.max_delay) new_delay = dev_priv->ips.max_delay; } else if (busy_down < min_avg) { if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay) new_delay = dev_priv->ips.cur_delay + 1; if (new_delay > dev_priv->ips.min_delay) new_delay = dev_priv->ips.min_delay; } if (ironlake_set_drps(dev, new_delay)) dev_priv->ips.cur_delay = new_delay; spin_unlock_irqrestore(&mchdev_lock, flags); return; } static void notify_ring(struct drm_device *dev, struct intel_ring_buffer *ring) { struct drm_i915_private *dev_priv = dev->dev_private; if (ring->obj == NULL) return; trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false)); wake_up_all(ring); if (i915_enable_hangcheck) { dev_priv->hangcheck_count = 0; timeout_add_msec(&dev_priv->hangcheck_timer, 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); u32 pm_iir, pm_imr; u8 new_delay; spin_lock_irq(&dev_priv->rps.lock); pm_iir = dev_priv->rps.pm_iir; dev_priv->rps.pm_iir = 0; pm_imr = I915_READ(GEN6_PMIMR); I915_WRITE(GEN6_PMIMR, 0); spin_unlock_irq(&dev_priv->rps.lock); if ((pm_iir & GEN6_PM_DEFERRED_EVENTS) == 0) return; mutex_lock(&dev_priv->rps.hw_lock); if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) new_delay = dev_priv->rps.cur_delay + 1; else new_delay = dev_priv->rps.cur_delay - 1; /* sysfs frequency interfaces may have snuck in while servicing the * interrupt */ if (!(new_delay > dev_priv->rps.max_delay || new_delay < dev_priv->rps.min_delay)) { gen6_set_rps(dev_priv->dev, new_delay); } mutex_unlock(&dev_priv->rps.hw_lock); } /** * ivybridge_parity_work - Workqueue called when a parity error interrupt * occurred. * @work: workqueue struct * * Doesn't actually do anything except notify userspace. As a consequence of * this event, userspace should try to remap the bad rows since statistically * it is likely the same row is more likely to go bad again. */ static void ivybridge_parity_work(struct work_struct *work) { drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, l3_parity.error_work); u32 error_status, row, bank, subbank; // char *parity_event[5]; uint32_t misccpctl; unsigned long flags; /* We must turn off DOP level clock gating to access the L3 registers. * In order to prevent a get/put style interface, acquire struct mutex * any time we access those registers. */ mutex_lock(&dev_priv->dev->struct_mutex); misccpctl = I915_READ(GEN7_MISCCPCTL); I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE); POSTING_READ(GEN7_MISCCPCTL); error_status = I915_READ(GEN7_L3CDERRST1); row = GEN7_PARITY_ERROR_ROW(error_status); bank = GEN7_PARITY_ERROR_BANK(error_status); subbank = GEN7_PARITY_ERROR_SUBBANK(error_status); I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE); POSTING_READ(GEN7_L3CDERRST1); I915_WRITE(GEN7_MISCCPCTL, misccpctl); spin_lock_irqsave(&dev_priv->irq_lock, flags); dev_priv->gt_irq_mask &= ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT; I915_WRITE(GTIMR, dev_priv->gt_irq_mask); spin_unlock_irqrestore(&dev_priv->irq_lock, flags); mutex_unlock(&dev_priv->dev->struct_mutex); #if 0 parity_event[0] = "L3_PARITY_ERROR=1"; parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row); parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank); parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank); parity_event[4] = NULL; kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj, KOBJ_CHANGE, parity_event); #endif DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n", row, bank, subbank); #if 0 kfree(parity_event[3]); kfree(parity_event[2]); kfree(parity_event[1]); #endif } static void ivybridge_handle_parity_error(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long flags; if (!HAS_L3_GPU_CACHE(dev)) return; spin_lock_irqsave(&dev_priv->irq_lock, flags); dev_priv->gt_irq_mask |= GT_GEN7_L3_PARITY_ERROR_INTERRUPT; I915_WRITE(GTIMR, dev_priv->gt_irq_mask); spin_unlock_irqrestore(&dev_priv->irq_lock, flags); queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work); } static void snb_gt_irq_handler(struct drm_device *dev, struct drm_i915_private *dev_priv, u32 gt_iir) { if (gt_iir & (GEN6_RENDER_USER_INTERRUPT | GEN6_RENDER_PIPE_CONTROL_NOTIFY_INTERRUPT)) notify_ring(dev, &dev_priv->ring[RCS]); if (gt_iir & GEN6_BSD_USER_INTERRUPT) notify_ring(dev, &dev_priv->ring[VCS]); if (gt_iir & GEN6_BLITTER_USER_INTERRUPT) notify_ring(dev, &dev_priv->ring[BCS]); if (gt_iir & (GT_GEN6_BLT_CS_ERROR_INTERRUPT | GT_GEN6_BSD_CS_ERROR_INTERRUPT | GT_RENDER_CS_ERROR_INTERRUPT)) { DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir); i915_handle_error(dev, false); } if (gt_iir & GT_GEN7_L3_PARITY_ERROR_INTERRUPT) ivybridge_handle_parity_error(dev); } static void gen6_queue_rps_work(struct drm_i915_private *dev_priv, u32 pm_iir) { unsigned long flags; /* * 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->rps.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 dev_priv->rps.work. */ spin_lock_irqsave(&dev_priv->rps.lock, flags); dev_priv->rps.pm_iir |= pm_iir; I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir); POSTING_READ(GEN6_PMIMR); spin_unlock_irqrestore(&dev_priv->rps.lock, flags); queue_work(dev_priv->wq, &dev_priv->rps.work); } static irqreturn_t valleyview_irq_handler(void *arg) { drm_i915_private_t *dev_priv = arg; struct drm_device *dev = dev_priv->dev; u32 iir, gt_iir, pm_iir; irqreturn_t ret = IRQ_NONE; unsigned long irqflags; int pipe; u32 pipe_stats[I915_MAX_PIPES]; bool blc_event; // atomic_inc(&dev_priv->irq_received); while (true) { iir = I915_READ(VLV_IIR); gt_iir = I915_READ(GTIIR); pm_iir = I915_READ(GEN6_PMIIR); if (gt_iir == 0 && pm_iir == 0 && iir == 0) goto out; ret = IRQ_HANDLED; snb_gt_irq_handler(dev, dev_priv, gt_iir); spin_lock_irqsave(&dev_priv->irq_lock, irqflags); 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]); } } spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); for_each_pipe(pipe) { if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS) drm_handle_vblank(dev, pipe); if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) { intel_prepare_page_flip(dev, pipe); intel_finish_page_flip(dev, pipe); } } /* Consume port. Then clear IIR or we'll miss events */ if (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); } if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS) blc_event = true; if (pm_iir & GEN6_PM_DEFERRED_EVENTS) gen6_queue_rps_work(dev_priv, pm_iir); I915_WRITE(GTIIR, gt_iir); I915_WRITE(GEN6_PMIIR, pm_iir); I915_WRITE(VLV_IIR, iir); } out: return ret; } static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int pipe; if (pch_iir & SDE_HOTPLUG_MASK) queue_work(dev_priv->wq, &dev_priv->hotplug_work); 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 void cpt_irq_handler(struct drm_device *dev, u32 pch_iir) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int pipe; if (pch_iir & SDE_HOTPLUG_MASK_CPT) queue_work(dev_priv->wq, &dev_priv->hotplug_work); if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) DRM_DEBUG_DRIVER("PCH audio power change on port %d\n", (pch_iir & SDE_AUDIO_POWER_MASK_CPT) >> SDE_AUDIO_POWER_SHIFT_CPT); if (pch_iir & SDE_AUX_MASK_CPT) DRM_DEBUG_DRIVER("AUX channel interrupt\n"); if (pch_iir & SDE_GMBUS_CPT) DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n"); if (pch_iir & SDE_AUDIO_CP_REQ_CPT) DRM_DEBUG_DRIVER("Audio CP request interrupt\n"); if (pch_iir & SDE_AUDIO_CP_CHG_CPT) DRM_DEBUG_DRIVER("Audio CP change interrupt\n"); if (pch_iir & SDE_FDI_MASK_CPT) for_each_pipe(pipe) DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n", pipe_name(pipe), I915_READ(FDI_RX_IIR(pipe))); } static irqreturn_t ivybridge_irq_handler(void *arg) { drm_i915_private_t *dev_priv = arg; struct drm_device *dev = dev_priv->dev; u32 de_iir, gt_iir, de_ier, pm_iir; irqreturn_t ret = IRQ_NONE; int i; // 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); gt_iir = I915_READ(GTIIR); if (gt_iir) { snb_gt_irq_handler(dev, dev_priv, gt_iir); I915_WRITE(GTIIR, gt_iir); ret = IRQ_HANDLED; } de_iir = I915_READ(DEIIR); if (de_iir) { if (de_iir & DE_GSE_IVB) intel_opregion_gse_intr(dev); for (i = 0; i < 3; i++) { if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i))) drm_handle_vblank(dev, i); if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) { intel_prepare_page_flip(dev, i); intel_finish_page_flip_plane(dev, i); } } /* check event from PCH */ if (de_iir & DE_PCH_EVENT_IVB) { u32 pch_iir = I915_READ(SDEIIR); cpt_irq_handler(dev, pch_iir); /* clear PCH hotplug event before clear CPU irq */ I915_WRITE(SDEIIR, pch_iir); } I915_WRITE(DEIIR, de_iir); ret = IRQ_HANDLED; } pm_iir = I915_READ(GEN6_PMIIR); if (pm_iir) { if (pm_iir & GEN6_PM_DEFERRED_EVENTS) gen6_queue_rps_work(dev_priv, pm_iir); I915_WRITE(GEN6_PMIIR, pm_iir); ret = IRQ_HANDLED; } I915_WRITE(DEIER, de_ier); POSTING_READ(DEIER); return ret; } static void ilk_gt_irq_handler(struct drm_device *dev, struct drm_i915_private *dev_priv, u32 gt_iir) { if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY)) notify_ring(dev, &dev_priv->ring[RCS]); if (gt_iir & GT_BSD_USER_INTERRUPT) notify_ring(dev, &dev_priv->ring[VCS]); } static irqreturn_t ironlake_irq_handler(void *arg) { drm_i915_private_t *dev_priv = arg; struct drm_device *dev = dev_priv->dev; int ret = IRQ_NONE; u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir; // 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 && (!IS_GEN6(dev) || pm_iir == 0)) goto done; ret = IRQ_HANDLED; if (IS_GEN5(dev)) ilk_gt_irq_handler(dev, dev_priv, gt_iir); else snb_gt_irq_handler(dev, dev_priv, gt_iir); if (de_iir & DE_GSE) intel_opregion_gse_intr(dev); if (de_iir & DE_PIPEA_VBLANK) drm_handle_vblank(dev, 0); if (de_iir & DE_PIPEB_VBLANK) drm_handle_vblank(dev, 1); 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); } /* check event from PCH */ if (de_iir & DE_PCH_EVENT) { if (HAS_PCH_CPT(dev)) cpt_irq_handler(dev, pch_iir); else ibx_irq_handler(dev, pch_iir); } if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT) ironlake_handle_rps_change(dev); if (IS_GEN6(dev) && pm_iir & GEN6_PM_DEFERRED_EVENTS) gen6_queue_rps_work(dev_priv, pm_iir); /* 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; #if 0 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); #endif 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)) { atomic_set(&dev_priv->mm.wedged, 0); // kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event); } mtx_enter(&dev_priv->error_completion_lock); dev_priv->error_completion++; wakeup(&dev_priv->error_completion); mtx_leave(&dev_priv->error_completion_lock); } } /* NB: please notice the memset */ static void i915_get_extra_instdone(struct drm_device *dev, uint32_t *instdone) { struct drm_i915_private *dev_priv = dev->dev_private; memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG); switch(INTEL_INFO(dev)->gen) { case 2: case 3: instdone[0] = I915_READ(INSTDONE); break; case 4: case 5: case 6: instdone[0] = I915_READ(INSTDONE_I965); instdone[1] = I915_READ(INSTDONE1); break; default: WARN_ONCE(1, "Unsupported platform\n"); case 7: instdone[0] = I915_READ(GEN7_INSTDONE_1); instdone[1] = I915_READ(GEN7_SC_INSTDONE); instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE); instdone[3] = I915_READ(GEN7_ROW_INSTDONE); break; } } #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 i, count; u32 reloc_offset; if (src == NULL || src->pages == NULL) return NULL; count = src->base.size / PAGE_SIZE; dst = kmalloc(sizeof(*dst) + count * sizeof(u32 *), GFP_ATOMIC); if (dst == NULL) return NULL; reloc_offset = src->gtt_offset; for (i = 0; i < count; i++) { unsigned long flags; void *d; d = kmalloc(PAGE_SIZE, GFP_ATOMIC); if (d == NULL) goto unwind; local_irq_save(flags); if (reloc_offset < dev_priv->mm.gtt_mappable_end && src->has_global_gtt_mapping) { void __iomem *s; /* Simply ignore tiling or any overlapping fence. * It's part of the error state, and this hopefully * captures what the GPU read. */ s = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping, reloc_offset); memcpy_fromio(d, s, PAGE_SIZE); io_mapping_unmap_atomic(s); } else { struct page *page; void *s; page = i915_gem_object_get_page(src, i); drm_clflush_pages(&page, 1); s = kmap_atomic(page); memcpy(d, s, PAGE_SIZE); kunmap_atomic(s); drm_clflush_pages(&page, 1); } local_irq_restore(flags); dst->pages[i] = d; reloc_offset += PAGE_SIZE; } dst->page_count = count; dst->gtt_offset = src->gtt_offset; return dst; unwind: while (i--) kfree(dst->pages[i]); 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); } void i915_error_state_free(struct kref *error_ref) { struct drm_i915_error_state *error = container_of(error_ref, typeof(*error), ref); int i; for (i = 0; i < ARRAY_SIZE(error->ring); i++) { i915_error_object_free(error->ring[i].batchbuffer); i915_error_object_free(error->ring[i].ringbuffer); kfree(error->ring[i].requests); } kfree(error->active_bo); kfree(error->overlay); kfree(error); } static void capture_bo(struct drm_i915_error_buffer *err, struct drm_i915_gem_object *obj) { err->size = obj->base.size; err->name = obj->base.name; err->rseqno = obj->last_read_seqno; err->wseqno = obj->last_write_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 : -1; err->cache_level = obj->cache_level; } static u32 capture_active_bo(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) { capture_bo(err++, obj); if (++i == count) break; } return i; } static u32 capture_pinned_bo(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, gtt_list) { if (obj->pin_count == 0) continue; capture_bo(err++, obj); if (++i == count) break; } 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 7: 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; if (HAS_BROKEN_CS_TLB(dev_priv->dev)) { u32 acthd = I915_READ(ACTHD); if (WARN_ON(ring->id != RCS)) return NULL; obj = ring->private; if (acthd >= obj->gtt_offset && acthd < obj->gtt_offset + obj->base.size) return i915_error_object_create(dev_priv, obj); } seqno = ring->get_seqno(ring, false); list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) { if (obj->ring != ring) continue; if (i915_seqno_passed(seqno, obj->last_read_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; } static void i915_record_ring_state(struct drm_device *dev, struct drm_i915_error_state *error, struct intel_ring_buffer *ring) { struct drm_i915_private *dev_priv = dev->dev_private; if (INTEL_INFO(dev)->gen >= 6) { error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50); error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring)); error->semaphore_mboxes[ring->id][0] = I915_READ(RING_SYNC_0(ring->mmio_base)); error->semaphore_mboxes[ring->id][1] = I915_READ(RING_SYNC_1(ring->mmio_base)); error->semaphore_seqno[ring->id][0] = ring->sync_seqno[0]; error->semaphore_seqno[ring->id][1] = ring->sync_seqno[1]; } if (INTEL_INFO(dev)->gen >= 4) { error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base)); error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base)); error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base)); error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base)); error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base)); if (ring->id == RCS) error->bbaddr = I915_READ64(BB_ADDR); } else { error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX); error->ipeir[ring->id] = I915_READ(IPEIR); error->ipehr[ring->id] = I915_READ(IPEHR); error->instdone[ring->id] = I915_READ(INSTDONE); } error->waiting[ring->id] = waitqueue_active(&ring->irq_queue); error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base)); error->seqno[ring->id] = ring->get_seqno(ring, false); error->acthd[ring->id] = intel_ring_get_active_head(ring); error->head[ring->id] = I915_READ_HEAD(ring); error->tail[ring->id] = I915_READ_TAIL(ring); error->ctl[ring->id] = I915_READ_CTL(ring); error->cpu_ring_head[ring->id] = ring->head; error->cpu_ring_tail[ring->id] = ring->tail; } static void i915_gem_record_rings(struct drm_device *dev, struct drm_i915_error_state *error) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_ring_buffer *ring; struct drm_i915_gem_request *request; int i, count; for_each_ring(ring, dev_priv, i) { i915_record_ring_state(dev, error, ring); error->ring[i].batchbuffer = i915_error_first_batchbuffer(dev_priv, ring); error->ring[i].ringbuffer = i915_error_object_create(dev_priv, ring->obj); count = 0; list_for_each_entry(request, &ring->request_list, list) count++; error->ring[i].num_requests = count; error->ring[i].requests = kmalloc(count*sizeof(struct drm_i915_error_request), GFP_ATOMIC); if (error->ring[i].requests == NULL) { error->ring[i].num_requests = 0; continue; } count = 0; list_for_each_entry(request, &ring->request_list, list) { struct drm_i915_error_request *erq; erq = &error->ring[i].requests[count++]; erq->seqno = request->seqno; erq->jiffies = request->emitted_jiffies; erq->tail = request->tail; } } } /** * 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 = kzalloc(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); kref_init(&error->ref); error->eir = I915_READ(EIR); error->pgtbl_er = I915_READ(PGTBL_ER); error->ccid = I915_READ(CCID); if (HAS_PCH_SPLIT(dev)) error->ier = I915_READ(DEIER) | I915_READ(GTIER); else if (IS_VALLEYVIEW(dev)) error->ier = I915_READ(GTIER) | I915_READ(VLV_IER); else if (IS_GEN2(dev)) error->ier = I915_READ16(IER); else error->ier = I915_READ(IER); if (INTEL_INFO(dev)->gen >= 6) error->derrmr = I915_READ(DERRMR); if (IS_VALLEYVIEW(dev)) error->forcewake = I915_READ(FORCEWAKE_VLV); else if (INTEL_INFO(dev)->gen >= 7) error->forcewake = I915_READ(FORCEWAKE_MT); else if (INTEL_INFO(dev)->gen == 6) error->forcewake = I915_READ(FORCEWAKE); for_each_pipe(pipe) error->pipestat[pipe] = I915_READ(PIPESTAT(pipe)); if (INTEL_INFO(dev)->gen >= 6) { error->error = I915_READ(ERROR_GEN6); error->done_reg = I915_READ(DONE_REG); } if (INTEL_INFO(dev)->gen == 7) error->err_int = I915_READ(GEN7_ERR_INT); i915_get_extra_instdone(dev, error->extra_instdone); i915_gem_record_fences(dev, error); i915_gem_record_rings(dev, error); /* 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.bound_list, gtt_list) if (obj->pin_count) 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_active_bo(error->active_bo, error->active_bo_count, &dev_priv->mm.active_list); if (error->pinned_bo) error->pinned_bo_count = capture_pinned_bo(error->pinned_bo, error->pinned_bo_count, &dev_priv->mm.bound_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(&error->ref); } void i915_destroy_error_state(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_error_state *error; unsigned long flags; spin_lock_irqsave(&dev_priv->error_lock, flags); error = dev_priv->first_error; dev_priv->first_error = NULL; spin_unlock_irqrestore(&dev_priv->error_lock, flags); if (error) kref_put(&error->ref, i915_error_state_free); } #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; uint32_t instdone[I915_NUM_INSTDONE_REG]; u32 eir = I915_READ(EIR); int pipe, i; if (!eir) return; pr_err("render error detected, EIR: 0x%08x\n", eir); i915_get_extra_instdone(dev, instdone); if (IS_G4X(dev)) { if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) { u32 ipeir = I915_READ(IPEIR_I965); pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965)); pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965)); for (i = 0; i < ARRAY_SIZE(instdone); i++) pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]); pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS)); pr_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); pr_err("page table error\n"); pr_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); pr_err("page table error\n"); pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err); I915_WRITE(PGTBL_ER, pgtbl_err); POSTING_READ(PGTBL_ER); } } if (eir & I915_ERROR_MEMORY_REFRESH) { pr_err("memory refresh error:\n"); for_each_pipe(pipe) pr_err("pipe %c stat: 0x%08x\n", pipe_name(pipe), I915_READ(PIPESTAT(pipe))); /* pipestat has already been acked */ } if (eir & I915_ERROR_INSTRUCTION) { pr_err("instruction error\n"); pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM)); for (i = 0; i < ARRAY_SIZE(instdone); i++) pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]); if (INTEL_INFO(dev)->gen < 4) { u32 ipeir = I915_READ(IPEIR); pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR)); pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR)); pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD)); I915_WRITE(IPEIR, ipeir); POSTING_READ(IPEIR); } else { u32 ipeir = I915_READ(IPEIR_I965); pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965)); pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965)); pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS)); pr_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; struct intel_ring_buffer *ring; int i; 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 */ for_each_ring(ring, dev_priv, i) wake_up_all(ring); } 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 || atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE || !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_HI_DISPBASE(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->pitches[0] + 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); } } /* 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, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS)); 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, DE_PIPEA_VBLANK_IVB << (5 * pipe)); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); return 0; } static int valleyview_enable_vblank(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; u32 imr; if (!i915_pipe_enabled(dev, pipe)) return -EINVAL; spin_lock_irqsave(&dev_priv->irq_lock, irqflags); imr = I915_READ(VLV_IMR); if (pipe == 0) imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT; else imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; I915_WRITE(VLV_IMR, imr); i915_enable_pipestat(dev_priv, pipe, PIPE_START_VBLANK_INTERRUPT_ENABLE); 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, _MASKED_BIT_ENABLE(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, DE_PIPEA_VBLANK_IVB << (pipe * 5)); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); } static void valleyview_disable_vblank(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; u32 imr; spin_lock_irqsave(&dev_priv->irq_lock, irqflags); i915_disable_pipestat(dev_priv, pipe, PIPE_START_VBLANK_INTERRUPT_ENABLE); imr = I915_READ(VLV_IMR); if (pipe == 0) imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT; else imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; I915_WRITE(VLV_IMR, imr); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); } 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, false), ring_last_seqno(ring))) { /* Issue a wake-up to catch stuck h/w. */ #ifdef notyet if (wakeup(ring) > 0) { DRM_ERROR("Hangcheck timer elapsed... %s idle\n", ring->name); *err = true; } #else wake_up_all(ring); #endif 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; } return false; } static bool i915_hangcheck_hung(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; if (dev_priv->hangcheck_count++ > 1) { bool hung = true; DRM_ERROR("Hangcheck timer elapsed... GPU hung\n"); i915_handle_error(dev, true); if (!IS_GEN2(dev)) { struct intel_ring_buffer *ring; int i; /* 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. */ for_each_ring(ring, dev_priv, i) hung &= !kick_ring(ring); } return hung; } 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(void *arg) { drm_i915_private_t *dev_priv = arg; struct drm_device *dev = dev_priv->dev; uint32_t acthd[I915_NUM_RINGS], instdone[I915_NUM_INSTDONE_REG]; struct intel_ring_buffer *ring; bool err = false, idle; int i; if (!i915_enable_hangcheck) return; memset(acthd, 0, sizeof(acthd)); idle = true; for_each_ring(ring, dev_priv, i) { idle &= i915_hangcheck_ring_idle(ring, &err); acthd[i] = intel_ring_get_active_head(ring); } /* If all work is done then ACTHD clearly hasn't advanced. */ if (idle) { if (err) { if (i915_hangcheck_hung(dev)) return; goto repeat; } dev_priv->hangcheck_count = 0; return; } i915_get_extra_instdone(dev, instdone); if (memcmp(dev_priv->last_acthd, acthd, sizeof(acthd)) == 0 && memcmp(dev_priv->prev_instdone, instdone, sizeof(instdone)) == 0) { if (i915_hangcheck_hung(dev)) return; } else { dev_priv->hangcheck_count = 0; memcpy(dev_priv->last_acthd, acthd, sizeof(acthd)); memcpy(dev_priv->prev_instdone, instdone, sizeof(instdone)); } repeat: /* Reset timer case chip hangs without another request being added */ timeout_add_msec(&dev_priv->hangcheck_timer, 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); I915_WRITE(HWSTAM, 0xeffe); /* 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 void valleyview_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); /* VLV magic */ I915_WRITE(VLV_IMR, 0); I915_WRITE(RING_IMR(RENDER_RING_BASE), 0); I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0); I915_WRITE(RING_IMR(BLT_RING_BASE), 0); /* and GT */ I915_WRITE(GTIIR, I915_READ(GTIIR)); I915_WRITE(GTIIR, I915_READ(GTIIR)); I915_WRITE(GTIMR, 0xffffffff); I915_WRITE(GTIER, 0x0); POSTING_READ(GTIER); I915_WRITE(DPINVGTT, 0xff); I915_WRITE(PORT_HOTPLUG_EN, 0); I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); for_each_pipe(pipe) I915_WRITE(PIPESTAT(pipe), 0xffff); I915_WRITE(VLV_IIR, 0xffffffff); I915_WRITE(VLV_IMR, 0xffffffff); I915_WRITE(VLV_IER, 0x0); POSTING_READ(VLV_IER); } /* * Enable digital hotplug on the PCH, and configure the DP short pulse * duration to 2ms (which is the minimum in the Display Port spec) * * This register is the same on all known PCH chips. */ static void ironlake_enable_pch_hotplug(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u32 hotplug; hotplug = I915_READ(PCH_PORT_HOTPLUG); hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK); hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms; hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms; hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms; I915_WRITE(PCH_PORT_HOTPLUG, hotplug); } 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; 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 | GEN6_BSD_USER_INTERRUPT | GEN6_BLITTER_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); ironlake_enable_pch_hotplug(dev); 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_PLANEC_FLIP_DONE_IVB | DE_PLANEB_FLIP_DONE_IVB | DE_PLANEA_FLIP_DONE_IVB; u32 render_irqs; u32 hotplug_mask; 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_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB | DE_PIPEA_VBLANK_IVB); POSTING_READ(DEIER); dev_priv->gt_irq_mask = ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT; I915_WRITE(GTIIR, I915_READ(GTIIR)); I915_WRITE(GTIMR, dev_priv->gt_irq_mask); render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT | GEN6_BLITTER_USER_INTERRUPT | GT_GEN7_L3_PARITY_ERROR_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); ironlake_enable_pch_hotplug(dev); return 0; } static int valleyview_irq_postinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u32 enable_mask; u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN); u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV; u32 render_irqs; u16 msid; enable_mask = I915_DISPLAY_PORT_INTERRUPT; enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; /* *Leave vblank interrupts masked initially. enable/disable will * toggle them based on usage. */ dev_priv->irq_mask = (~enable_mask) | I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT | I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; dev_priv->pipestat[0] = 0; dev_priv->pipestat[1] = 0; /* Hack for broken MSIs on VLV */ pci_conf_write(dev_priv->pc, dev_priv->tag, 0x94, 0xfee00000); msid = pci_conf_read(dev_priv->pc, dev_priv->tag, 0x98); msid &= 0xff; /* mask out delivery bits */ msid |= (1<<14); pci_conf_write(dev_priv->pc, dev_priv->tag, 0x98, msid); I915_WRITE(VLV_IMR, dev_priv->irq_mask); I915_WRITE(VLV_IER, enable_mask); I915_WRITE(VLV_IIR, 0xffffffff); I915_WRITE(PIPESTAT(0), 0xffff); I915_WRITE(PIPESTAT(1), 0xffff); POSTING_READ(VLV_IER); i915_enable_pipestat(dev_priv, 0, pipestat_enable); i915_enable_pipestat(dev_priv, 1, pipestat_enable); I915_WRITE(VLV_IIR, 0xffffffff); I915_WRITE(VLV_IIR, 0xffffffff); I915_WRITE(GTIIR, I915_READ(GTIIR)); I915_WRITE(GTIMR, dev_priv->gt_irq_mask); render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT | GEN6_BLITTER_USER_INTERRUPT; I915_WRITE(GTIER, render_irqs); POSTING_READ(GTIER); /* ack & enable invalid PTE error interrupts */ #if 0 /* FIXME: add support to irq handler for checking these bits */ I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK); I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK); #endif I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE); /* 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_I915) hotplug_en |= SDVOC_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I915) hotplug_en |= SDVOB_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) { hotplug_en |= CRT_HOTPLUG_INT_EN; hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50; } I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); return 0; } static void valleyview_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; for_each_pipe(pipe) I915_WRITE(PIPESTAT(pipe), 0xffff); I915_WRITE(HWSTAM, 0xffffffff); I915_WRITE(PORT_HOTPLUG_EN, 0); I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); for_each_pipe(pipe) I915_WRITE(PIPESTAT(pipe), 0xffff); I915_WRITE(VLV_IIR, 0xffffffff); I915_WRITE(VLV_IMR, 0xffffffff); I915_WRITE(VLV_IER, 0x0); POSTING_READ(VLV_IER); } 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; 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)); I915_WRITE(SDEIMR, 0xffffffff); I915_WRITE(SDEIER, 0x0); I915_WRITE(SDEIIR, I915_READ(SDEIIR)); } static void i8xx_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); for_each_pipe(pipe) I915_WRITE(PIPESTAT(pipe), 0); I915_WRITE16(IMR, 0xffff); I915_WRITE16(IER, 0x0); POSTING_READ16(IER); } static int i8xx_irq_postinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; dev_priv->pipestat[0] = 0; dev_priv->pipestat[1] = 0; I915_WRITE16(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH)); /* Unmask the interrupts that we always want on. */ dev_priv->irq_mask = ~(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); I915_WRITE16(IMR, dev_priv->irq_mask); I915_WRITE16(IER, I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT | I915_USER_INTERRUPT); POSTING_READ16(IER); return 0; } static irqreturn_t i8xx_irq_handler(void *arg) { drm_i915_private_t *dev_priv = arg; struct drm_device *dev = dev_priv->dev; u16 iir, new_iir; u32 pipe_stats[2]; unsigned long irqflags; int irq_received; int pipe; u16 flip_mask = I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT; // atomic_inc(&dev_priv->irq_received); iir = I915_READ16(IIR); if (iir == 0) return IRQ_NONE; while (iir & ~flip_mask) { /* 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); I915_WRITE16(IIR, iir & ~flip_mask); new_iir = I915_READ16(IIR); /* Flush posted writes */ // i915_update_dri1_breadcrumb(dev); if (iir & I915_USER_INTERRUPT) notify_ring(dev, &dev_priv->ring[RCS]); if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS && drm_handle_vblank(dev, 0)) { if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) { intel_prepare_page_flip(dev, 0); intel_finish_page_flip(dev, 0); flip_mask &= ~I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT; } } if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS && drm_handle_vblank(dev, 1)) { if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) { intel_prepare_page_flip(dev, 1); intel_finish_page_flip(dev, 1); flip_mask &= ~I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT; } } iir = new_iir; } return IRQ_HANDLED; } static void i8xx_irq_uninstall(struct drm_device * dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int pipe; for_each_pipe(pipe) { /* Clear enable bits; then clear status bits */ I915_WRITE(PIPESTAT(pipe), 0); I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe))); } I915_WRITE16(IMR, 0xffff); I915_WRITE16(IER, 0x0); I915_WRITE16(IIR, I915_READ16(IIR)); } static void i915_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); if (I915_HAS_HOTPLUG(dev)) { I915_WRITE(PORT_HOTPLUG_EN, 0); I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); } I915_WRITE16(HWSTAM, 0xeffe); for_each_pipe(pipe) I915_WRITE(PIPESTAT(pipe), 0); I915_WRITE(IMR, 0xffffffff); I915_WRITE(IER, 0x0); POSTING_READ(IER); } static int i915_irq_postinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u32 enable_mask; dev_priv->pipestat[0] = 0; dev_priv->pipestat[1] = 0; I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH)); /* Unmask the interrupts that we always want on. */ dev_priv->irq_mask = ~(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); enable_mask = I915_ASLE_INTERRUPT | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT | I915_USER_INTERRUPT; 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; } 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); 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_I915) hotplug_en |= SDVOC_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I915) hotplug_en |= SDVOB_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) { hotplug_en |= CRT_HOTPLUG_INT_EN; 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 irqreturn_t i915_irq_handler(void *arg) { drm_i915_private_t *dev_priv = arg; struct drm_device *dev = dev_priv->dev; u32 iir, new_iir, pipe_stats[I915_MAX_PIPES]; unsigned long irqflags; u32 flip_mask = I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT; u32 flip[2] = { I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT, I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT }; int pipe, ret = IRQ_NONE; // atomic_inc(&dev_priv->irq_received); iir = I915_READ(IIR); do { bool irq_received = (iir & ~flip_mask) != 0; bool blc_event = false; /* 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 = true; } } spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); if (!irq_received) break; /* 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); POSTING_READ(PORT_HOTPLUG_STAT); } I915_WRITE(IIR, iir & ~flip_mask); new_iir = I915_READ(IIR); /* Flush posted writes */ if (iir & I915_USER_INTERRUPT) notify_ring(dev, &dev_priv->ring[RCS]); for_each_pipe(pipe) { int plane = pipe; if (IS_MOBILE(dev)) plane = !plane; if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS && drm_handle_vblank(dev, pipe)) { if (iir & flip[plane]) { intel_prepare_page_flip(dev, plane); intel_finish_page_flip(dev, pipe); flip_mask &= ~flip[plane]; } } 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. */ ret = IRQ_HANDLED; iir = new_iir; } while (iir & ~flip_mask); // i915_update_dri1_breadcrumb(dev); return ret; } static void i915_irq_uninstall(struct drm_device * dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int pipe; if (I915_HAS_HOTPLUG(dev)) { I915_WRITE(PORT_HOTPLUG_EN, 0); I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); } I915_WRITE16(HWSTAM, 0xffff); for_each_pipe(pipe) { /* Clear enable bits; then clear status bits */ I915_WRITE(PIPESTAT(pipe), 0); I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe))); } I915_WRITE(IMR, 0xffffffff); I915_WRITE(IER, 0x0); I915_WRITE(IIR, I915_READ(IIR)); } static void i965_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); 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); } static int i965_irq_postinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u32 hotplug_en; u32 enable_mask; u32 error_mask; /* Unmask the interrupts that we always want on. */ dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT | I915_DISPLAY_PORT_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); enable_mask = ~dev_priv->irq_mask; enable_mask |= I915_USER_INTERRUPT; if (IS_G4X(dev)) enable_mask |= I915_BSD_USER_INTERRUPT; dev_priv->pipestat[0] = 0; dev_priv->pipestat[1] = 0; /* * 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); /* Note HDMI and DP share hotplug bits */ hotplug_en = 0; 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 (IS_G4X(dev)) { if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_G4X) hotplug_en |= SDVOC_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_G4X) hotplug_en |= SDVOB_HOTPLUG_INT_EN; } else { if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I965) hotplug_en |= SDVOC_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I965) 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 irqreturn_t i965_irq_handler(void *arg) { drm_i915_private_t *dev_priv = arg; struct drm_device *dev = dev_priv->dev; u32 iir, new_iir; u32 pipe_stats[I915_MAX_PIPES]; unsigned long irqflags; int irq_received; int ret = IRQ_NONE, pipe; // atomic_inc(&dev_priv->irq_received); iir = I915_READ(IIR); for (;;) { bool blc_event = false; 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 (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 (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 (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) intel_prepare_page_flip(dev, 1); for_each_pipe(pipe) { if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS && drm_handle_vblank(dev, pipe)) { 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; } // i915_update_dri1_breadcrumb(dev); return ret; } static void i965_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; 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) { struct drm_i915_private *dev_priv = dev->dev_private; INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func); INIT_WORK(&dev_priv->error_work, i915_error_work_func); INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work); INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work); dev->driver->get_vblank_counter = i915_get_vblank_counter; dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */ if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */ dev->driver->get_vblank_counter = gm45_get_vblank_counter; } if (drm_core_check_feature(dev, DRIVER_MODESET)) dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp; else dev->driver->get_vblank_timestamp = NULL; dev->driver->get_scanout_position = i915_get_crtc_scanoutpos; if (IS_VALLEYVIEW(dev)) { dev->driver->irq_handler = valleyview_irq_handler; dev->driver->irq_preinstall = valleyview_irq_preinstall; dev->driver->irq_postinstall = valleyview_irq_postinstall; dev->driver->irq_uninstall = valleyview_irq_uninstall; dev->driver->enable_vblank = valleyview_enable_vblank; dev->driver->disable_vblank = valleyview_disable_vblank; } else 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 (IS_HASWELL(dev)) { /* Share interrupts handling with IVB */ 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 { if (INTEL_INFO(dev)->gen == 2) { dev->driver->irq_preinstall = i8xx_irq_preinstall; dev->driver->irq_postinstall = i8xx_irq_postinstall; dev->driver->irq_handler = i8xx_irq_handler; dev->driver->irq_uninstall = i8xx_irq_uninstall; } else if (INTEL_INFO(dev)->gen == 3) { dev->driver->irq_preinstall = i915_irq_preinstall; dev->driver->irq_postinstall = i915_irq_postinstall; dev->driver->irq_uninstall = i915_irq_uninstall; dev->driver->irq_handler = i915_irq_handler; } else { dev->driver->irq_preinstall = i965_irq_preinstall; dev->driver->irq_postinstall = i965_irq_postinstall; dev->driver->irq_uninstall = i965_irq_uninstall; dev->driver->irq_handler = i965_irq_handler; } dev->driver->enable_vblank = i915_enable_vblank; dev->driver->disable_vblank = i915_disable_vblank; } }