diff options
author | James Morris <jmorris@namei.org> | 2008-11-14 11:29:12 +1100 |
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committer | James Morris <jmorris@namei.org> | 2008-11-14 11:29:12 +1100 |
commit | 2b828925652340277a889cbc11b2d0637f7cdaf7 (patch) | |
tree | 32fcb3d3e466fc419fad2d3717956a5b5ad3d35a /drivers/gpu/drm/i915/i915_irq.c | |
parent | 3a3b7ce9336952ea7b9564d976d068a238976c9d (diff) | |
parent | 58e20d8d344b0ee083febb18c2b021d2427e56ca (diff) | |
download | op-kernel-dev-2b828925652340277a889cbc11b2d0637f7cdaf7.zip op-kernel-dev-2b828925652340277a889cbc11b2d0637f7cdaf7.tar.gz |
Merge branch 'master' into next
Conflicts:
security/keys/internal.h
security/keys/process_keys.c
security/keys/request_key.c
Fixed conflicts above by using the non 'tsk' versions.
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 383 |
1 files changed, 16 insertions, 367 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 26f4893..82752d6 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -80,211 +80,6 @@ i915_pipe_enabled(struct drm_device *dev, int pipe) return 0; } -/** - * Emit blits for scheduled buffer swaps. - * - * This function will be called with the HW lock held. - * Because this function must grab the ring mutex (dev->struct_mutex), - * it can no longer run at soft irq time. We'll fix this when we do - * the DRI2 swap buffer work. - */ -static void i915_vblank_tasklet(struct drm_device *dev) -{ - drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; - unsigned long irqflags; - struct list_head *list, *tmp, hits, *hit; - int nhits, nrects, slice[2], upper[2], lower[2], i; - unsigned counter[2]; - struct drm_drawable_info *drw; - drm_i915_sarea_t *sarea_priv = dev_priv->sarea_priv; - u32 cpp = dev_priv->cpp; - u32 cmd = (cpp == 4) ? (XY_SRC_COPY_BLT_CMD | - XY_SRC_COPY_BLT_WRITE_ALPHA | - XY_SRC_COPY_BLT_WRITE_RGB) - : XY_SRC_COPY_BLT_CMD; - u32 src_pitch = sarea_priv->pitch * cpp; - u32 dst_pitch = sarea_priv->pitch * cpp; - u32 ropcpp = (0xcc << 16) | ((cpp - 1) << 24); - RING_LOCALS; - - mutex_lock(&dev->struct_mutex); - - if (IS_I965G(dev) && sarea_priv->front_tiled) { - cmd |= XY_SRC_COPY_BLT_DST_TILED; - dst_pitch >>= 2; - } - if (IS_I965G(dev) && sarea_priv->back_tiled) { - cmd |= XY_SRC_COPY_BLT_SRC_TILED; - src_pitch >>= 2; - } - - counter[0] = drm_vblank_count(dev, 0); - counter[1] = drm_vblank_count(dev, 1); - - DRM_DEBUG("\n"); - - INIT_LIST_HEAD(&hits); - - nhits = nrects = 0; - - spin_lock_irqsave(&dev_priv->swaps_lock, irqflags); - - /* Find buffer swaps scheduled for this vertical blank */ - list_for_each_safe(list, tmp, &dev_priv->vbl_swaps.head) { - drm_i915_vbl_swap_t *vbl_swap = - list_entry(list, drm_i915_vbl_swap_t, head); - int pipe = vbl_swap->pipe; - - if ((counter[pipe] - vbl_swap->sequence) > (1<<23)) - continue; - - list_del(list); - dev_priv->swaps_pending--; - drm_vblank_put(dev, pipe); - - spin_unlock(&dev_priv->swaps_lock); - spin_lock(&dev->drw_lock); - - drw = drm_get_drawable_info(dev, vbl_swap->drw_id); - - list_for_each(hit, &hits) { - drm_i915_vbl_swap_t *swap_cmp = - list_entry(hit, drm_i915_vbl_swap_t, head); - struct drm_drawable_info *drw_cmp = - drm_get_drawable_info(dev, swap_cmp->drw_id); - - /* Make sure both drawables are still - * around and have some rectangles before - * we look inside to order them for the - * blts below. - */ - if (drw_cmp && drw_cmp->num_rects > 0 && - drw && drw->num_rects > 0 && - drw_cmp->rects[0].y1 > drw->rects[0].y1) { - list_add_tail(list, hit); - break; - } - } - - spin_unlock(&dev->drw_lock); - - /* List of hits was empty, or we reached the end of it */ - if (hit == &hits) - list_add_tail(list, hits.prev); - - nhits++; - - spin_lock(&dev_priv->swaps_lock); - } - - if (nhits == 0) { - spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags); - mutex_unlock(&dev->struct_mutex); - return; - } - - spin_unlock(&dev_priv->swaps_lock); - - i915_kernel_lost_context(dev); - - if (IS_I965G(dev)) { - BEGIN_LP_RING(4); - - OUT_RING(GFX_OP_DRAWRECT_INFO_I965); - OUT_RING(0); - OUT_RING(((sarea_priv->width - 1) & 0xffff) | ((sarea_priv->height - 1) << 16)); - OUT_RING(0); - ADVANCE_LP_RING(); - } else { - BEGIN_LP_RING(6); - - OUT_RING(GFX_OP_DRAWRECT_INFO); - OUT_RING(0); - OUT_RING(0); - OUT_RING(sarea_priv->width | sarea_priv->height << 16); - OUT_RING(sarea_priv->width | sarea_priv->height << 16); - OUT_RING(0); - - ADVANCE_LP_RING(); - } - - sarea_priv->ctxOwner = DRM_KERNEL_CONTEXT; - - upper[0] = upper[1] = 0; - slice[0] = max(sarea_priv->pipeA_h / nhits, 1); - slice[1] = max(sarea_priv->pipeB_h / nhits, 1); - lower[0] = sarea_priv->pipeA_y + slice[0]; - lower[1] = sarea_priv->pipeB_y + slice[0]; - - spin_lock(&dev->drw_lock); - - /* Emit blits for buffer swaps, partitioning both outputs into as many - * slices as there are buffer swaps scheduled in order to avoid tearing - * (based on the assumption that a single buffer swap would always - * complete before scanout starts). - */ - for (i = 0; i++ < nhits; - upper[0] = lower[0], lower[0] += slice[0], - upper[1] = lower[1], lower[1] += slice[1]) { - if (i == nhits) - lower[0] = lower[1] = sarea_priv->height; - - list_for_each(hit, &hits) { - drm_i915_vbl_swap_t *swap_hit = - list_entry(hit, drm_i915_vbl_swap_t, head); - struct drm_clip_rect *rect; - int num_rects, pipe; - unsigned short top, bottom; - - drw = drm_get_drawable_info(dev, swap_hit->drw_id); - - /* The drawable may have been destroyed since - * the vblank swap was queued - */ - if (!drw) - continue; - - rect = drw->rects; - pipe = swap_hit->pipe; - top = upper[pipe]; - bottom = lower[pipe]; - - for (num_rects = drw->num_rects; num_rects--; rect++) { - int y1 = max(rect->y1, top); - int y2 = min(rect->y2, bottom); - - if (y1 >= y2) - continue; - - BEGIN_LP_RING(8); - - OUT_RING(cmd); - OUT_RING(ropcpp | dst_pitch); - OUT_RING((y1 << 16) | rect->x1); - OUT_RING((y2 << 16) | rect->x2); - OUT_RING(sarea_priv->front_offset); - OUT_RING((y1 << 16) | rect->x1); - OUT_RING(src_pitch); - OUT_RING(sarea_priv->back_offset); - - ADVANCE_LP_RING(); - } - } - } - - spin_unlock_irqrestore(&dev->drw_lock, irqflags); - mutex_unlock(&dev->struct_mutex); - - list_for_each_safe(hit, tmp, &hits) { - drm_i915_vbl_swap_t *swap_hit = - list_entry(hit, drm_i915_vbl_swap_t, head); - - list_del(hit); - - drm_free(swap_hit, sizeof(*swap_hit), DRM_MEM_DRIVER); - } -} - /* Called from drm generic code, passed a 'crtc', which * we use as a pipe index */ @@ -322,40 +117,6 @@ u32 i915_get_vblank_counter(struct drm_device *dev, int pipe) return count; } -void -i915_vblank_work_handler(struct work_struct *work) -{ - drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, - vblank_work); - struct drm_device *dev = dev_priv->dev; - unsigned long irqflags; - - if (dev->lock.hw_lock == NULL) { - i915_vblank_tasklet(dev); - return; - } - - spin_lock_irqsave(&dev->tasklet_lock, irqflags); - dev->locked_tasklet_func = i915_vblank_tasklet; - spin_unlock_irqrestore(&dev->tasklet_lock, irqflags); - - /* Try to get the lock now, if this fails, the lock - * holder will execute the tasklet during unlock - */ - if (!drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) - return; - - dev->lock.lock_time = jiffies; - atomic_inc(&dev->counts[_DRM_STAT_LOCKS]); - - spin_lock_irqsave(&dev->tasklet_lock, irqflags); - dev->locked_tasklet_func = NULL; - spin_unlock_irqrestore(&dev->tasklet_lock, irqflags); - - i915_vblank_tasklet(dev); - drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT); -} - irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) { struct drm_device *dev = (struct drm_device *) arg; @@ -433,9 +194,6 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) if (iir & I915_ASLE_INTERRUPT) opregion_asle_intr(dev); - if (vblank && dev_priv->swaps_pending > 0) - schedule_work(&dev_priv->vblank_work); - return IRQ_HANDLED; } @@ -454,12 +212,10 @@ static int i915_emit_irq(struct drm_device * dev) if (dev_priv->sarea_priv) dev_priv->sarea_priv->last_enqueue = dev_priv->counter; - BEGIN_LP_RING(6); + BEGIN_LP_RING(4); OUT_RING(MI_STORE_DWORD_INDEX); - OUT_RING(5 << MI_STORE_DWORD_INDEX_SHIFT); + OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); OUT_RING(dev_priv->counter); - OUT_RING(0); - OUT_RING(0); OUT_RING(MI_USER_INTERRUPT); ADVANCE_LP_RING(); @@ -696,123 +452,21 @@ int i915_vblank_pipe_get(struct drm_device *dev, void *data, int i915_vblank_swap(struct drm_device *dev, void *data, struct drm_file *file_priv) { - drm_i915_private_t *dev_priv = dev->dev_private; - drm_i915_vblank_swap_t *swap = data; - drm_i915_vbl_swap_t *vbl_swap, *vbl_old; - unsigned int pipe, seqtype, curseq; - unsigned long irqflags; - struct list_head *list; - int ret; - - if (!dev_priv || !dev_priv->sarea_priv) { - DRM_ERROR("%s called with no initialization\n", __func__); - return -EINVAL; - } - - if (dev_priv->sarea_priv->rotation) { - DRM_DEBUG("Rotation not supported\n"); - return -EINVAL; - } - - if (swap->seqtype & ~(_DRM_VBLANK_RELATIVE | _DRM_VBLANK_ABSOLUTE | - _DRM_VBLANK_SECONDARY | _DRM_VBLANK_NEXTONMISS)) { - DRM_ERROR("Invalid sequence type 0x%x\n", swap->seqtype); - return -EINVAL; - } - - pipe = (swap->seqtype & _DRM_VBLANK_SECONDARY) ? 1 : 0; - - seqtype = swap->seqtype & (_DRM_VBLANK_RELATIVE | _DRM_VBLANK_ABSOLUTE); - - if (!(dev_priv->vblank_pipe & (1 << pipe))) { - DRM_ERROR("Invalid pipe %d\n", pipe); - return -EINVAL; - } - - spin_lock_irqsave(&dev->drw_lock, irqflags); - - if (!drm_get_drawable_info(dev, swap->drawable)) { - spin_unlock_irqrestore(&dev->drw_lock, irqflags); - DRM_DEBUG("Invalid drawable ID %d\n", swap->drawable); - return -EINVAL; - } - - spin_unlock_irqrestore(&dev->drw_lock, irqflags); - - /* - * We take the ref here and put it when the swap actually completes - * in the tasklet. + /* 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. */ - ret = drm_vblank_get(dev, pipe); - if (ret) - return ret; - curseq = drm_vblank_count(dev, pipe); - - if (seqtype == _DRM_VBLANK_RELATIVE) - swap->sequence += curseq; - - if ((curseq - swap->sequence) <= (1<<23)) { - if (swap->seqtype & _DRM_VBLANK_NEXTONMISS) { - swap->sequence = curseq + 1; - } else { - DRM_DEBUG("Missed target sequence\n"); - drm_vblank_put(dev, pipe); - return -EINVAL; - } - } - - vbl_swap = drm_calloc(1, sizeof(*vbl_swap), DRM_MEM_DRIVER); - - if (!vbl_swap) { - DRM_ERROR("Failed to allocate memory to queue swap\n"); - drm_vblank_put(dev, pipe); - return -ENOMEM; - } - - vbl_swap->drw_id = swap->drawable; - vbl_swap->pipe = pipe; - vbl_swap->sequence = swap->sequence; - - spin_lock_irqsave(&dev_priv->swaps_lock, irqflags); - - list_for_each(list, &dev_priv->vbl_swaps.head) { - vbl_old = list_entry(list, drm_i915_vbl_swap_t, head); - - if (vbl_old->drw_id == swap->drawable && - vbl_old->pipe == pipe && - vbl_old->sequence == swap->sequence) { - spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags); - drm_vblank_put(dev, pipe); - drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER); - DRM_DEBUG("Already scheduled\n"); - return 0; - } - } - - if (dev_priv->swaps_pending >= 10) { - DRM_DEBUG("Too many swaps queued\n"); - DRM_DEBUG(" pipe 0: %d pipe 1: %d\n", - drm_vblank_count(dev, 0), - drm_vblank_count(dev, 1)); - - list_for_each(list, &dev_priv->vbl_swaps.head) { - vbl_old = list_entry(list, drm_i915_vbl_swap_t, head); - DRM_DEBUG("\tdrw %x pipe %d seq %x\n", - vbl_old->drw_id, vbl_old->pipe, - vbl_old->sequence); - } - spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags); - drm_vblank_put(dev, pipe); - drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER); - return -EBUSY; - } - - list_add_tail(&vbl_swap->head, &dev_priv->vbl_swaps.head); - dev_priv->swaps_pending++; - - spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags); - - return 0; + return -EINVAL; } /* drm_dma.h hooks @@ -831,11 +485,6 @@ int i915_driver_irq_postinstall(struct drm_device *dev) drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int ret, num_pipes = 2; - spin_lock_init(&dev_priv->swaps_lock); - INIT_LIST_HEAD(&dev_priv->vbl_swaps.head); - INIT_WORK(&dev_priv->vblank_work, i915_vblank_work_handler); - dev_priv->swaps_pending = 0; - /* Set initial unmasked IRQs to just the selected vblank pipes. */ dev_priv->irq_mask_reg = ~0; |