| /* 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 <linux/sysrq.h> |
| #include <linux/slab.h> |
| #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) |
| |
| void |
| ironlake_enable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask) |
| { |
| if ((dev_priv->gt_irq_mask & mask) != 0) { |
| dev_priv->gt_irq_mask &= ~mask; |
| I915_WRITE(GTIMR, dev_priv->gt_irq_mask); |
| POSTING_READ(GTIMR); |
| } |
| } |
| |
| void |
| ironlake_disable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask) |
| { |
| if ((dev_priv->gt_irq_mask & mask) != mask) { |
| dev_priv->gt_irq_mask |= mask; |
| I915_WRITE(GTIMR, dev_priv->gt_irq_mask); |
| POSTING_READ(GTIMR); |
| } |
| } |
| |
| /* 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_irq(drm_i915_private_t *dev_priv, u32 mask) |
| { |
| if ((dev_priv->irq_mask & mask) != 0) { |
| dev_priv->irq_mask &= ~mask; |
| I915_WRITE(IMR, dev_priv->irq_mask); |
| POSTING_READ(IMR); |
| } |
| } |
| |
| void |
| i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask) |
| { |
| if ((dev_priv->irq_mask & mask) != mask) { |
| dev_priv->irq_mask |= mask; |
| I915_WRITE(IMR, dev_priv->irq_mask); |
| POSTING_READ(IMR); |
| } |
| } |
| |
| static inline u32 |
| i915_pipestat(int pipe) |
| { |
| if (pipe == 0) |
| return PIPEASTAT; |
| if (pipe == 1) |
| return PIPEBSTAT; |
| BUG(); |
| } |
| |
| void |
| i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) |
| { |
| if ((dev_priv->pipestat[pipe] & mask) != mask) { |
| u32 reg = i915_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 = i915_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 |
| */ |
| 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 %d\n", pipe); |
| return 0; |
| } |
| |
| high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH; |
| low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL; |
| |
| /* |
| * 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; |
| } |
| |
| 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 ? PIPEB_FRMCOUNT_GM45 : PIPEA_FRMCOUNT_GM45; |
| |
| if (!i915_pipe_enabled(dev, pipe)) { |
| DRM_DEBUG_DRIVER("trying to get vblank count for disabled " |
| "pipe %d\n", pipe); |
| return 0; |
| } |
| |
| return I915_READ(reg); |
| } |
| |
| /* |
| * 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; |
| |
| list_for_each_entry(encoder, &mode_config->encoder_list, base.head) |
| if (encoder->hot_plug) |
| encoder->hot_plug(encoder); |
| |
| /* 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 = ring->get_seqno(ring); |
| ring->irq_seqno = seqno; |
| trace_i915_gem_request_complete(dev, 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 irqreturn_t ironlake_irq_handler(struct drm_device *dev) |
| { |
| 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; |
| u32 hotplug_mask; |
| struct drm_i915_master_private *master_priv; |
| u32 bsd_usr_interrupt = GT_BSD_USER_INTERRUPT; |
| |
| 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); |
| |
| if (de_iir == 0 && gt_iir == 0 && pch_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) |
| 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) && (pch_iir & hotplug_mask)) |
| queue_work(dev_priv->wq, &dev_priv->hotplug_work); |
| |
| if (de_iir & DE_PCU_EVENT) { |
| I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS)); |
| i915_handle_rps_change(dev); |
| } |
| |
| /* should clear PCH hotplug event before clear CPU irq */ |
| I915_WRITE(SDEIIR, pch_iir); |
| I915_WRITE(GTIIR, gt_iir); |
| I915_WRITE(DEIIR, de_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_device *dev, |
| struct drm_i915_gem_object *src) |
| { |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| 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) |
| { |
| i915_error_object_free(error->batchbuffer[0]); |
| i915_error_object_free(error->batchbuffer[1]); |
| i915_error_object_free(error->ringbuffer); |
| kfree(error->active_bo); |
| kfree(error->overlay); |
| kfree(error); |
| } |
| |
| static u32 |
| i915_get_bbaddr(struct drm_device *dev, u32 *ring) |
| { |
| u32 cmd; |
| |
| if (IS_I830(dev) || IS_845G(dev)) |
| cmd = MI_BATCH_BUFFER; |
| else if (INTEL_INFO(dev)->gen >= 4) |
| cmd = (MI_BATCH_BUFFER_START | (2 << 6) | |
| MI_BATCH_NON_SECURE_I965); |
| else |
| cmd = (MI_BATCH_BUFFER_START | (2 << 6)); |
| |
| return ring[0] == cmd ? ring[1] : 0; |
| } |
| |
| static u32 |
| i915_ringbuffer_last_batch(struct drm_device *dev, |
| struct intel_ring_buffer *ring) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| u32 head, bbaddr; |
| u32 *val; |
| |
| /* Locate the current position in the ringbuffer and walk back |
| * to find the most recently dispatched batch buffer. |
| */ |
| head = I915_READ_HEAD(ring) & HEAD_ADDR; |
| |
| val = (u32 *)(ring->virtual_start + head); |
| while (--val >= (u32 *)ring->virtual_start) { |
| bbaddr = i915_get_bbaddr(dev, val); |
| if (bbaddr) |
| return bbaddr; |
| } |
| |
| val = (u32 *)(ring->virtual_start + ring->size); |
| while (--val >= (u32 *)ring->virtual_start) { |
| bbaddr = i915_get_bbaddr(dev, val); |
| if (bbaddr) |
| return bbaddr; |
| } |
| |
| return 0; |
| } |
| |
| 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; |
| |
| 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; |
| |
| } |
| } |
| |
| /** |
| * 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; |
| struct drm_i915_gem_object *batchbuffer[2]; |
| unsigned long flags; |
| u32 bbaddr; |
| int count; |
| |
| spin_lock_irqsave(&dev_priv->error_lock, flags); |
| error = dev_priv->first_error; |
| spin_unlock_irqrestore(&dev_priv->error_lock, flags); |
| if (error) |
| return; |
| |
| error = kmalloc(sizeof(*error), GFP_ATOMIC); |
| if (!error) { |
| DRM_DEBUG_DRIVER("out of memory, not capturing error state\n"); |
| return; |
| } |
| |
| DRM_DEBUG_DRIVER("generating error event\n"); |
| |
| error->seqno = dev_priv->ring[RCS].get_seqno(&dev_priv->ring[RCS]); |
| error->eir = I915_READ(EIR); |
| error->pgtbl_er = I915_READ(PGTBL_ER); |
| error->pipeastat = I915_READ(PIPEASTAT); |
| error->pipebstat = I915_READ(PIPEBSTAT); |
| 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); |
| |
| bbaddr = i915_ringbuffer_last_batch(dev, &dev_priv->ring[RCS]); |
| |
| /* Grab the current batchbuffer, most likely to have crashed. */ |
| batchbuffer[0] = NULL; |
| batchbuffer[1] = NULL; |
| count = 0; |
| list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) { |
| if (batchbuffer[0] == NULL && |
| bbaddr >= obj->gtt_offset && |
| bbaddr < obj->gtt_offset + obj->base.size) |
| batchbuffer[0] = obj; |
| |
| if (batchbuffer[1] == NULL && |
| error->acthd >= obj->gtt_offset && |
| error->acthd < obj->gtt_offset + obj->base.size) |
| batchbuffer[1] = obj; |
| |
| count++; |
| } |
| /* Scan the other lists for completeness for those bizarre errors. */ |
| if (batchbuffer[0] == NULL || batchbuffer[1] == NULL) { |
| list_for_each_entry(obj, &dev_priv->mm.flushing_list, mm_list) { |
| if (batchbuffer[0] == NULL && |
| bbaddr >= obj->gtt_offset && |
| bbaddr < obj->gtt_offset + obj->base.size) |
| batchbuffer[0] = obj; |
| |
| if (batchbuffer[1] == NULL && |
| error->acthd >= obj->gtt_offset && |
| error->acthd < obj->gtt_offset + obj->base.size) |
| batchbuffer[1] = obj; |
| |
| if (batchbuffer[0] && batchbuffer[1]) |
| break; |
| } |
| } |
| if (batchbuffer[0] == NULL || batchbuffer[1] == NULL) { |
| list_for_each_entry(obj, &dev_priv->mm.inactive_list, mm_list) { |
| if (batchbuffer[0] == NULL && |
| bbaddr >= obj->gtt_offset && |
| bbaddr < obj->gtt_offset + obj->base.size) |
| batchbuffer[0] = obj; |
| |
| if (batchbuffer[1] == NULL && |
| error->acthd >= obj->gtt_offset && |
| error->acthd < obj->gtt_offset + obj->base.size) |
| batchbuffer[1] = obj; |
| |
| if (batchbuffer[0] && batchbuffer[1]) |
| break; |
| } |
| } |
| |
| /* We need to copy these to an anonymous buffer as the simplest |
| * method to avoid being overwritten by userspace. |
| */ |
| error->batchbuffer[0] = i915_error_object_create(dev, batchbuffer[0]); |
| if (batchbuffer[1] != batchbuffer[0]) |
| error->batchbuffer[1] = i915_error_object_create(dev, batchbuffer[1]); |
| else |
| error->batchbuffer[1] = NULL; |
| |
| /* Record the ringbuffer */ |
| error->ringbuffer = i915_error_object_create(dev, |
| dev_priv->ring[RCS].obj); |
| |
| /* Record buffers on the active and pinned lists. */ |
| error->active_bo = NULL; |
| error->pinned_bo = NULL; |
| |
| error->active_bo_count = count; |
| list_for_each_entry(obj, &dev_priv->mm.pinned_list, mm_list) |
| count++; |
| error->pinned_bo_count = count - error->active_bo_count; |
| |
| if (count) { |
| error->active_bo = kmalloc(sizeof(*error->active_bo)*count, |
| 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); |
| |
| 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) { |
| u32 pipea_stats = I915_READ(PIPEASTAT); |
| u32 pipeb_stats = I915_READ(PIPEBSTAT); |
| |
| printk(KERN_ERR "memory refresh error\n"); |
| printk(KERN_ERR "PIPEASTAT: 0x%08x\n", |
| pipea_stats); |
| printk(KERN_ERR "PIPEBSTAT: 0x%08x\n", |
| pipeb_stats); |
| /* 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 = intel_crtc->plane == 0 ? DSPASURF : DSPBSURF; |
| stall_detected = I915_READ(dspsurf) == obj->gtt_offset; |
| } else { |
| int dspaddr = intel_crtc->plane == 0 ? DSPAADDR : DSPBADDR; |
| 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); |
| } |
| } |
| |
| 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 pipea_stats, pipeb_stats; |
| u32 vblank_status; |
| int vblank = 0; |
| unsigned long irqflags; |
| int irq_received; |
| int ret = IRQ_NONE; |
| |
| atomic_inc(&dev_priv->irq_received); |
| |
| if (HAS_PCH_SPLIT(dev)) |
| return ironlake_irq_handler(dev); |
| |
| 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); |
| pipea_stats = I915_READ(PIPEASTAT); |
| pipeb_stats = I915_READ(PIPEBSTAT); |
| |
| if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) |
| i915_handle_error(dev, false); |
| |
| /* |
| * Clear the PIPE(A|B)STAT regs before the IIR |
| */ |
| if (pipea_stats & 0x8000ffff) { |
| if (pipea_stats & PIPE_FIFO_UNDERRUN_STATUS) |
| DRM_DEBUG_DRIVER("pipe a underrun\n"); |
| I915_WRITE(PIPEASTAT, pipea_stats); |
| irq_received = 1; |
| } |
| |
| if (pipeb_stats & 0x8000ffff) { |
| if (pipeb_stats & PIPE_FIFO_UNDERRUN_STATUS) |
| DRM_DEBUG_DRIVER("pipe b underrun\n"); |
| I915_WRITE(PIPEBSTAT, pipeb_stats); |
| 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); |
| } |
| |
| if (pipea_stats & vblank_status) { |
| vblank++; |
| drm_handle_vblank(dev, 0); |
| if (!dev_priv->flip_pending_is_done) { |
| i915_pageflip_stall_check(dev, 0); |
| intel_finish_page_flip(dev, 0); |
| } |
| } |
| |
| if (pipeb_stats & vblank_status) { |
| vblank++; |
| drm_handle_vblank(dev, 1); |
| if (!dev_priv->flip_pending_is_done) { |
| i915_pageflip_stall_check(dev, 1); |
| intel_finish_page_flip(dev, 1); |
| } |
| } |
| |
| if ((pipea_stats & PIPE_LEGACY_BLC_EVENT_STATUS) || |
| (pipeb_stats & PIPE_LEGACY_BLC_EVENT_STATUS) || |
| (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; |
| } |
| |
| void i915_trace_irq_get(struct drm_device *dev, u32 seqno) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| struct intel_ring_buffer *ring = LP_RING(dev_priv); |
| |
| if (dev_priv->trace_irq_seqno == 0) |
| ring->irq_get(ring); |
| |
| dev_priv->trace_irq_seqno = seqno; |
| } |
| |
| 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; |
| |
| ring->irq_get(ring); |
| DRM_WAIT_ON(ret, ring->irq_queue, 3 * DRM_HZ, |
| READ_BREADCRUMB(dev_priv) >= irq_nr); |
| ring->irq_put(ring); |
| |
| 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 |
| */ |
| 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 (HAS_PCH_SPLIT(dev)) |
| ironlake_enable_display_irq(dev_priv, (pipe == 0) ? |
| DE_PIPEA_VBLANK: DE_PIPEB_VBLANK); |
| else 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); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| return 0; |
| } |
| |
| /* Called from drm generic code, passed 'crtc' which |
| * we use as a pipe index |
| */ |
| 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 (HAS_PCH_SPLIT(dev)) |
| ironlake_disable_display_irq(dev_priv, (pipe == 0) ? |
| DE_PIPEA_VBLANK: DE_PIPEB_VBLANK); |
| else |
| i915_disable_pipestat(dev_priv, pipe, |
| PIPE_VBLANK_INTERRUPT_ENABLE | |
| PIPE_START_VBLANK_INTERRUPT_ENABLE); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| } |
| |
| void i915_enable_interrupt (struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| if (!HAS_PCH_SPLIT(dev)) |
| intel_opregion_enable_asle(dev); |
| dev_priv->irq_enabled = 1; |
| } |
| |
| |
| /* 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; |
| |
| 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 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)) { |
| I915_WRITE(GEN6_RENDER_IMR, ~GEN6_RENDER_USER_INTERRUPT); |
| I915_WRITE(GEN6_BSD_IMR, ~GEN6_BSD_USER_INTERRUPT); |
| I915_WRITE(GEN6_BLITTER_IMR, ~GEN6_BLITTER_USER_INTERRUPT); |
| } |
| |
| 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_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; |
| } |
| |
| 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; |
| } |
| |
| void i915_driver_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 (HAS_PCH_SPLIT(dev)) { |
| ironlake_irq_preinstall(dev); |
| return; |
| } |
| |
| 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); |
| I915_WRITE(PIPEASTAT, 0); |
| I915_WRITE(PIPEBSTAT, 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. |
| */ |
| 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; |
| |
| 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; |
| |
| if (HAS_PCH_SPLIT(dev)) |
| return ironlake_irq_postinstall(dev); |
| |
| /* 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; |
| 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)); |
| } |
| |
| void i915_driver_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; |
| |
| if (HAS_PCH_SPLIT(dev)) { |
| ironlake_irq_uninstall(dev); |
| return; |
| } |
| |
| 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); |
| I915_WRITE(PIPEASTAT, 0); |
| I915_WRITE(PIPEBSTAT, 0); |
| I915_WRITE(IMR, 0xffffffff); |
| I915_WRITE(IER, 0x0); |
| |
| I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); |
| I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); |
| I915_WRITE(IIR, I915_READ(IIR)); |
| } |