+++ /dev/null
-/* 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);
-}
projects / platform / upstream / libdrm.git / commitdiff