diff options
| l---------[-rw-r--r--] | linux-core/i915_irq.c | 971 |
1 files changed, 1 insertions, 970 deletions
diff --git a/linux-core/i915_irq.c b/linux-core/i915_irq.c index 28f9f6af..2058a2e4 100644..120000 --- a/linux-core/i915_irq.c +++ b/linux-core/i915_irq.c @@ -1,970 +1 @@ -/* 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 "drmP.h" -#include "drm.h" -#include "i915_drm.h" -#include "i915_drv.h" - -#define MAX_NOPID ((u32)~0) - -/** - * i915_get_pipe - return the the pipe associated with a given plane - * @dev: DRM device - * @plane: plane to look for - * - * The Intel Mesa & 2D drivers call the vblank routines with a plane number - * rather than a pipe number, since they may not always be equal. This routine - * maps the given @plane back to a pipe number. - */ -static int -i915_get_pipe(struct drm_device *dev, int plane) -{ - drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; - u32 dspcntr; - - dspcntr = plane ? I915_READ(DSPBCNTR) : I915_READ(DSPACNTR); - - return dspcntr & DISPPLANE_SEL_PIPE_MASK ? 1 : 0; -} - -/** - * i915_get_plane - return the the plane associated with a given pipe - * @dev: DRM device - * @pipe: pipe to look for - * - * The Intel Mesa & 2D drivers call the vblank routines with a plane number - * rather than a plane number, since they may not always be equal. This routine - * maps the given @pipe back to a plane number. - */ -static int -i915_get_plane(struct drm_device *dev, int pipe) -{ - if (i915_get_pipe(dev, 0) == pipe) - return 0; - return 1; -} - -/** - * 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; - unsigned long pipeconf = pipe ? PIPEBCONF : PIPEACONF; - - if (I915_READ(pipeconf) & PIPEACONF_ENABLE) - return 1; - - return 0; -} - -/** - * Emit a synchronous flip. - * - * This function must be called with the drawable spinlock held. - */ -static void -i915_dispatch_vsync_flip(struct drm_device *dev, struct drm_drawable_info *drw, - int plane) -{ - drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; - drm_i915_sarea_t *sarea_priv = dev_priv->sarea_priv; - u16 x1, y1, x2, y2; - int pf_planes = 1 << plane; - - DRM_SPINLOCK_ASSERT(&dev->drw_lock); - - /* If the window is visible on the other plane, we have to flip on that - * plane as well. - */ - if (plane == 1) { - x1 = sarea_priv->planeA_x; - y1 = sarea_priv->planeA_y; - x2 = x1 + sarea_priv->planeA_w; - y2 = y1 + sarea_priv->planeA_h; - } else { - x1 = sarea_priv->planeB_x; - y1 = sarea_priv->planeB_y; - x2 = x1 + sarea_priv->planeB_w; - y2 = y1 + sarea_priv->planeB_h; - } - - if (x2 > 0 && y2 > 0) { - int i, num_rects = drw->num_rects; - struct drm_clip_rect *rect = drw->rects; - - for (i = 0; i < num_rects; i++) - if (!(rect[i].x1 >= x2 || rect[i].y1 >= y2 || - rect[i].x2 <= x1 || rect[i].y2 <= y1)) { - pf_planes = 0x3; - - break; - } - } - - i915_dispatch_flip(dev, pf_planes, 1); -} - -/** - * Emit blits for scheduled buffer swaps. - * - * This function will be called with the HW lock held. - */ -static void i915_vblank_tasklet(struct drm_device *dev) -{ - drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; - struct list_head *list, *tmp, hits, *hit; - int nhits, nrects, slice[2], upper[2], lower[2], i, num_pages; - unsigned counter[2]; - struct drm_drawable_info *drw; - drm_i915_sarea_t *sarea_priv = dev_priv->sarea_priv; - u32 cpp = dev_priv->cpp, offsets[3]; - 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; - /* COPY rop (0xcc), map cpp to magic color depth constants */ - u32 ropcpp = (0xcc << 16) | ((cpp - 1) << 24); - RING_LOCALS; - - 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; - - /* No irqsave/restore necessary. This tasklet may be run in an - * interrupt context or normal context, but we don't have to worry - * about getting interrupted by something acquiring the lock, because - * we are the interrupt context thing that acquires the lock. - */ - DRM_SPINLOCK(&dev_priv->swaps_lock); - - /* 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 = i915_get_pipe(dev, vbl_swap->plane); - - if ((counter[pipe] - vbl_swap->sequence) > (1<<23)) - continue; - - list_del(list); - dev_priv->swaps_pending--; - drm_vblank_put(dev, pipe); - - DRM_SPINUNLOCK(&dev_priv->swaps_lock); - DRM_SPINLOCK(&dev->drw_lock); - - drw = drm_get_drawable_info(dev, vbl_swap->drw_id); - - if (!drw) { - DRM_SPINUNLOCK(&dev->drw_lock); - drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER); - DRM_SPINLOCK(&dev_priv->swaps_lock); - continue; - } - - 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); - - if (drw_cmp && - drw_cmp->rects[0].y1 > drw->rects[0].y1) { - list_add_tail(list, hit); - break; - } - } - - DRM_SPINUNLOCK(&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++; - - DRM_SPINLOCK(&dev_priv->swaps_lock); - } - - DRM_SPINUNLOCK(&dev_priv->swaps_lock); - - if (nhits == 0) { - return; - } - - i915_kernel_lost_context(dev); - - upper[0] = upper[1] = 0; - slice[0] = max(sarea_priv->planeA_h / nhits, 1); - slice[1] = max(sarea_priv->planeB_h / nhits, 1); - lower[0] = sarea_priv->planeA_y + slice[0]; - lower[1] = sarea_priv->planeB_y + slice[0]; - - offsets[0] = sarea_priv->front_offset; - offsets[1] = sarea_priv->back_offset; - offsets[2] = sarea_priv->third_offset; - num_pages = sarea_priv->third_handle ? 3 : 2; - - DRM_SPINLOCK(&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]) { - int init_drawrect = 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, plane, front, back; - unsigned short top, bottom; - - drw = drm_get_drawable_info(dev, swap_hit->drw_id); - - if (!drw) - continue; - - plane = swap_hit->plane; - - if (swap_hit->flip) { - i915_dispatch_vsync_flip(dev, drw, plane); - continue; - } - - if (init_drawrect) { - int width = sarea_priv->width; - int height = sarea_priv->height; - if (IS_I965G(dev)) { - BEGIN_LP_RING(4); - - OUT_RING(GFX_OP_DRAWRECT_INFO_I965); - OUT_RING(0); - OUT_RING(((width - 1) & 0xffff) | ((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(((width - 1) & 0xffff) | ((height - 1) << 16)); - OUT_RING(0); - OUT_RING(0); - - ADVANCE_LP_RING(); - } - - sarea_priv->ctxOwner = DRM_KERNEL_CONTEXT; - - init_drawrect = 0; - } - - rect = drw->rects; - top = upper[plane]; - bottom = lower[plane]; - - front = (dev_priv->sarea_priv->pf_current_page >> - (2 * plane)) & 0x3; - back = (front + 1) % num_pages; - - 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(offsets[front]); - OUT_RING((y1 << 16) | rect->x1); - OUT_RING(src_pitch); - OUT_RING(offsets[back]); - - ADVANCE_LP_RING(); - } - } - } - - DRM_SPINUNLOCK(&dev->drw_lock); - - 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); - } -} -#if 0 -static int i915_in_vblank(struct drm_device *dev, int pipe) -{ - drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; - unsigned long pipedsl, vblank, vtotal; - unsigned long vbl_start, vbl_end, cur_line; - - pipedsl = pipe ? PIPEBDSL : PIPEADSL; - vblank = pipe ? VBLANK_B : VBLANK_A; - vtotal = pipe ? VTOTAL_B : VTOTAL_A; - - vbl_start = I915_READ(vblank) & VBLANK_START_MASK; - vbl_end = (I915_READ(vblank) >> VBLANK_END_SHIFT) & VBLANK_END_MASK; - - cur_line = I915_READ(pipedsl); - - if (cur_line >= vbl_start) - return 1; - - return 0; -} -#endif -u32 i915_get_vblank_counter(struct drm_device *dev, int plane) -{ - 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, count; - int pipe; - - pipe = i915_get_pipe(dev, plane); - high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH; - low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL; - - if (!i915_pipe_enabled(dev, pipe)) { - DRM_ERROR("trying to get vblank count for disabled pipe %d\n", pipe); - return 0; - } - - /* - * 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) >> - PIPE_FRAME_HIGH_SHIFT); - low = ((I915_READ(low_frame) & PIPE_FRAME_LOW_MASK) >> - PIPE_FRAME_LOW_SHIFT); - high2 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >> - PIPE_FRAME_HIGH_SHIFT); - } while (high1 != high2); - - count = (high1 << 8) | low; - - /* - * If we're in the middle of the vblank period, the - * above regs won't have been updated yet, so return - * an incremented count to stay accurate - */ -#if 0 - if (i915_in_vblank(dev, pipe)) - count++; -#endif - /* count may be reset by other driver(e.g. 2D driver), - we have no way to know if it is wrapped or resetted - when count is zero. do a rough guess. - */ - if (count == 0 && dev->last_vblank[pipe] < dev->max_vblank_count/2) - dev->last_vblank[pipe] = 0; - - return count; -} - -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; - u32 iir; - u32 pipea_stats, pipeb_stats; - int vblank = 0; - - iir = I915_READ(IIR); -#if 0 - DRM_DEBUG("flag=%08x\n", iir); -#endif - if (iir == 0) { - DRM_DEBUG ("iir 0x%08x im 0x%08x ie 0x%08x pipea 0x%08x pipeb 0x%08x\n", - iir, - I915_READ(IMR), - I915_READ(IER), - I915_READ(PIPEASTAT), - I915_READ(PIPEBSTAT)); - return IRQ_NONE; - } - - /* - * Clear the PIPE(A|B)STAT regs before the IIR otherwise - * we may get extra interrupts. - */ - if (iir & I915_DISPLAY_PIPE_A_EVENT_INTERRUPT) { - pipea_stats = I915_READ(PIPEASTAT); - if (pipea_stats & (PIPE_START_VBLANK_INTERRUPT_STATUS| - PIPE_VBLANK_INTERRUPT_STATUS)) - { - vblank++; - drm_handle_vblank(dev, i915_get_plane(dev, 0)); - } - - I915_WRITE(PIPEASTAT, pipea_stats); - } - if (iir & I915_DISPLAY_PIPE_B_EVENT_INTERRUPT) { - pipeb_stats = I915_READ(PIPEBSTAT); - if (pipeb_stats & (PIPE_START_VBLANK_INTERRUPT_STATUS| - PIPE_VBLANK_INTERRUPT_STATUS)) - { - vblank++; - drm_handle_vblank(dev, i915_get_plane(dev, 1)); - } - I915_WRITE(PIPEBSTAT, pipeb_stats); - } - - if (dev_priv->sarea_priv) - dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); - - I915_WRITE(IIR, iir); - (void) I915_READ(IIR); - - if (iir & I915_USER_INTERRUPT) { - DRM_WAKEUP(&dev_priv->irq_queue); -#ifdef I915_HAVE_FENCE - i915_fence_handler(dev); -#endif - } - - if (vblank) { - if (dev_priv->swaps_pending > 0) - drm_locked_tasklet(dev, i915_vblank_tasklet); - } - - return IRQ_HANDLED; -} - -int i915_emit_irq(struct drm_device *dev) -{ - drm_i915_private_t *dev_priv = dev->dev_private; - RING_LOCALS; - - i915_kernel_lost_context(dev); - - DRM_DEBUG("\n"); - - i915_emit_breadcrumb(dev); - - BEGIN_LP_RING(2); - OUT_RING(0); - OUT_RING(MI_USER_INTERRUPT); - ADVANCE_LP_RING(); - - return dev_priv->counter; -} - -void i915_user_irq_on(drm_i915_private_t *dev_priv) -{ - DRM_SPINLOCK(&dev_priv->user_irq_lock); - if (dev_priv->irq_enabled && (++dev_priv->user_irq_refcount == 1)){ - dev_priv->irq_enable_reg |= I915_USER_INTERRUPT; - I915_WRITE(IER, dev_priv->irq_enable_reg); - } - DRM_SPINUNLOCK(&dev_priv->user_irq_lock); - -} - -void i915_user_irq_off(drm_i915_private_t *dev_priv) -{ - DRM_SPINLOCK(&dev_priv->user_irq_lock); - if (dev_priv->irq_enabled && (--dev_priv->user_irq_refcount == 0)) { - // dev_priv->irq_enable_reg &= ~I915_USER_INTERRUPT; - // I915_WRITE(IER, dev_priv->irq_enable_reg); - } - DRM_SPINUNLOCK(&dev_priv->user_irq_lock); -} - - -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; - int ret = 0; - - DRM_DEBUG("irq_nr=%d breadcrumb=%d\n", irq_nr, - READ_BREADCRUMB(dev_priv)); - - if (READ_BREADCRUMB(dev_priv) >= irq_nr) - return 0; - - i915_user_irq_on(dev_priv); - DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ, - READ_BREADCRUMB(dev_priv) >= irq_nr); - i915_user_irq_off(dev_priv); - - if (ret == -EBUSY) { - DRM_ERROR("EBUSY -- rec: %d emitted: %d\n", - READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); - } - - if (dev_priv->sarea_priv) - dev_priv->sarea_priv->last_dispatch = - READ_BREADCRUMB(dev_priv); - 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; - - LOCK_TEST_WITH_RETURN(dev, file_priv); - - if (!dev_priv) { - DRM_ERROR("called with no initialization\n"); - return -EINVAL; - } - - result = i915_emit_irq(dev); - - 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); -} - -int i915_enable_vblank(struct drm_device *dev, int plane) -{ - drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; - int pipe = i915_get_pipe(dev, plane); - u32 pipestat_reg = 0; - u32 pipestat; - - switch (pipe) { - case 0: - pipestat_reg = PIPEASTAT; - dev_priv->irq_enable_reg |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT; - break; - case 1: - pipestat_reg = PIPEBSTAT; - dev_priv->irq_enable_reg |= I915_DISPLAY_PIPE_B_EVENT_INTERRUPT; - break; - default: - DRM_ERROR("tried to enable vblank on non-existent pipe %d\n", - pipe); - break; - } - - if (pipestat_reg) - { - pipestat = I915_READ (pipestat_reg); - /* - * Older chips didn't have the start vblank interrupt, - * but - */ - if (IS_I965G (dev)) - pipestat |= PIPE_START_VBLANK_INTERRUPT_ENABLE; - else - pipestat |= PIPE_VBLANK_INTERRUPT_ENABLE; - /* - * Clear any pending status - */ - pipestat |= (PIPE_START_VBLANK_INTERRUPT_STATUS | - PIPE_VBLANK_INTERRUPT_STATUS); - I915_WRITE(pipestat_reg, pipestat); - } - I915_WRITE(IER, dev_priv->irq_enable_reg); - - return 0; -} - -void i915_disable_vblank(struct drm_device *dev, int plane) -{ - drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; - int pipe = i915_get_pipe(dev, plane); - u32 pipestat_reg = 0; - u32 pipestat; - - switch (pipe) { - case 0: - pipestat_reg = PIPEASTAT; - dev_priv->irq_enable_reg &= ~I915_DISPLAY_PIPE_A_EVENT_INTERRUPT; - break; - case 1: - pipestat_reg = PIPEBSTAT; - dev_priv->irq_enable_reg &= ~I915_DISPLAY_PIPE_B_EVENT_INTERRUPT; - break; - default: - DRM_ERROR("tried to disable vblank on non-existent pipe %d\n", - pipe); - break; - } - - I915_WRITE(IER, dev_priv->irq_enable_reg); - - if (pipestat_reg) - { - pipestat = I915_READ (pipestat_reg); - pipestat &= ~(PIPE_START_VBLANK_INTERRUPT_ENABLE | - PIPE_VBLANK_INTERRUPT_ENABLE); - /* - * Clear any pending status - */ - pipestat |= (PIPE_START_VBLANK_INTERRUPT_STATUS | - PIPE_VBLANK_INTERRUPT_STATUS); - I915_WRITE(pipestat_reg, pipestat); - } -} - -static void i915_enable_interrupt (struct drm_device *dev) -{ - drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; - - dev_priv->irq_enable_reg |= I915_USER_INTERRUPT; - - I915_WRITE(IER, dev_priv->irq_enable_reg); - 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; - drm_i915_vblank_pipe_t *pipe = data; - - if (!dev_priv) { - DRM_ERROR("called with no initialization\n"); - return -EINVAL; - } - - if (pipe->pipe & ~(DRM_I915_VBLANK_PIPE_A|DRM_I915_VBLANK_PIPE_B)) { - DRM_ERROR("called with invalid pipe 0x%x\n", pipe->pipe); - return -EINVAL; - } - - dev_priv->vblank_pipe = pipe->pipe; - - 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; - u16 flag; - - if (!dev_priv) { - DRM_ERROR("called with no initialization\n"); - return -EINVAL; - } - - flag = I915_READ(IER); - - pipe->pipe = 0; - if (flag & I915_DISPLAY_PIPE_A_EVENT_INTERRUPT) - pipe->pipe |= DRM_I915_VBLANK_PIPE_A; - if (flag & I915_DISPLAY_PIPE_B_EVENT_INTERRUPT) - pipe->pipe |= 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) -{ - drm_i915_private_t *dev_priv = dev->dev_private; - drm_i915_vblank_swap_t *swap = data; - drm_i915_vbl_swap_t *vbl_swap; - unsigned int pipe, seqtype, curseq, plane; - unsigned long irqflags; - struct list_head *list; - int ret; - - if (!dev_priv) { - DRM_ERROR("%s called with no initialization\n", __func__); - return -EINVAL; - } - - if (!dev_priv->sarea_priv || 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_VBLANK_FLIP)) { - DRM_ERROR("Invalid sequence type 0x%x\n", swap->seqtype); - return -EINVAL; - } - - plane = (swap->seqtype & _DRM_VBLANK_SECONDARY) ? 1 : 0; - pipe = i915_get_pipe(dev, plane); - - 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; - } - - DRM_SPINLOCK_IRQSAVE(&dev->drw_lock, irqflags); - - /* It makes no sense to schedule a swap for a drawable that doesn't have - * valid information at this point. E.g. this could mean that the X - * server is too old to push drawable information to the DRM, in which - * case all such swaps would become ineffective. - */ - if (!drm_get_drawable_info(dev, swap->drawable)) { - DRM_SPINUNLOCK_IRQRESTORE(&dev->drw_lock, irqflags); - DRM_DEBUG("Invalid drawable ID %d\n", swap->drawable); - return -EINVAL; - } - - DRM_SPINUNLOCK_IRQRESTORE(&dev->drw_lock, irqflags); - - drm_update_vblank_count(dev, pipe); - 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"); - return -EINVAL; - } - } - - if (swap->seqtype & _DRM_VBLANK_FLIP) { - swap->sequence--; - - if ((curseq - swap->sequence) <= (1<<23)) { - struct drm_drawable_info *drw; - - LOCK_TEST_WITH_RETURN(dev, file_priv); - - DRM_SPINLOCK_IRQSAVE(&dev->drw_lock, irqflags); - - drw = drm_get_drawable_info(dev, swap->drawable); - - if (!drw) { - DRM_SPINUNLOCK_IRQRESTORE(&dev->drw_lock, - irqflags); - DRM_DEBUG("Invalid drawable ID %d\n", - swap->drawable); - return -EINVAL; - } - - i915_dispatch_vsync_flip(dev, drw, plane); - - DRM_SPINUNLOCK_IRQRESTORE(&dev->drw_lock, irqflags); - - return 0; - } - } - - DRM_SPINLOCK_IRQSAVE(&dev_priv->swaps_lock, irqflags); - - list_for_each(list, &dev_priv->vbl_swaps.head) { - vbl_swap = list_entry(list, drm_i915_vbl_swap_t, head); - - if (vbl_swap->drw_id == swap->drawable && - vbl_swap->plane == plane && - vbl_swap->sequence == swap->sequence) { - vbl_swap->flip = (swap->seqtype & _DRM_VBLANK_FLIP); - DRM_SPINUNLOCK_IRQRESTORE(&dev_priv->swaps_lock, irqflags); - DRM_DEBUG("Already scheduled\n"); - return 0; - } - } - - DRM_SPINUNLOCK_IRQRESTORE(&dev_priv->swaps_lock, irqflags); - - if (dev_priv->swaps_pending >= 100) { - DRM_DEBUG("Too many swaps queued\n"); - return -EBUSY; - } - - vbl_swap = drm_calloc(1, sizeof(*vbl_swap), DRM_MEM_DRIVER); - - if (!vbl_swap) { - DRM_ERROR("Failed to allocate memory to queue swap\n"); - return -ENOMEM; - } - - DRM_DEBUG("\n"); - - ret = drm_vblank_get(dev, pipe); - if (ret) { - drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER); - return ret; - } - - vbl_swap->drw_id = swap->drawable; - vbl_swap->plane = plane; - vbl_swap->sequence = swap->sequence; - vbl_swap->flip = (swap->seqtype & _DRM_VBLANK_FLIP); - - if (vbl_swap->flip) - swap->sequence++; - - DRM_SPINLOCK_IRQSAVE(&dev_priv->swaps_lock, irqflags); - - list_add_tail(&vbl_swap->head, &dev_priv->vbl_swaps.head); - dev_priv->swaps_pending++; - - DRM_SPINUNLOCK_IRQRESTORE(&dev_priv->swaps_lock, irqflags); - - return 0; -} - -/* drm_dma.h hooks -*/ -void i915_driver_irq_preinstall(struct drm_device * dev) -{ - drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; - - I915_WRITE16(HWSTAM, 0xeffe); - I915_WRITE16(IMR, 0x0); - I915_WRITE16(IER, 0x0); -} - -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; - - DRM_SPININIT(&dev_priv->swaps_lock, "swap"); - INIT_LIST_HEAD(&dev_priv->vbl_swaps.head); - dev_priv->swaps_pending = 0; - - DRM_SPININIT(&dev_priv->user_irq_lock, "userirq"); - dev_priv->user_irq_refcount = 0; - dev_priv->irq_enable_reg = 0; - - ret = drm_vblank_init(dev, num_pipes); - if (ret) - return ret; - - dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */ - - i915_enable_interrupt(dev); - DRM_INIT_WAITQUEUE(&dev_priv->irq_queue); - - /* - * Initialize the hardware status page IRQ location. - */ - - I915_WRITE(INSTPM, (1 << 5) | (1 << 21)); - return 0; -} - -void i915_driver_irq_uninstall(struct drm_device * dev) -{ - drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; - u32 temp; - - if (!dev_priv) - return; - - dev_priv->irq_enabled = 0; - I915_WRITE(HWSTAM, 0xffffffff); - I915_WRITE(IMR, 0xffffffff); - I915_WRITE(IER, 0x0); - - temp = I915_READ(PIPEASTAT); - I915_WRITE(PIPEASTAT, temp); - temp = I915_READ(PIPEBSTAT); - I915_WRITE(PIPEBSTAT, temp); - temp = I915_READ(IIR); - I915_WRITE(IIR, temp); -} +../shared-core/i915_irq.c
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