| /* 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 USER_INT_FLAG (1<<1) |
| #define VSYNC_PIPEB_FLAG (1<<5) |
| #define VSYNC_PIPEA_FLAG (1<<7) |
| |
| #define MAX_NOPID ((u32)~0) |
| |
| /** |
| * Emit blits for scheduled buffer swaps. |
| * |
| * This function will be called with the HW lock held. |
| */ |
| static void i915_vblank_tasklet(drm_device_t *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| unsigned long irqflags; |
| struct list_head *list, *tmp; |
| |
| DRM_DEBUG("\n"); |
| |
| spin_lock_irqsave(&dev_priv->swaps_lock, irqflags); |
| |
| 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); |
| atomic_t *counter = vbl_swap->pipe ? &dev->vbl_received2 : |
| &dev->vbl_received; |
| |
| if ((atomic_read(counter) - vbl_swap->sequence) <= (1<<23)) { |
| drm_drawable_info_t *drw; |
| |
| spin_unlock(&dev_priv->swaps_lock); |
| |
| spin_lock(&dev->drw_lock); |
| |
| drw = drm_get_drawable_info(dev, vbl_swap->drw_id); |
| |
| if (drw) { |
| int i, num_rects = drw->num_rects; |
| drm_clip_rect_t *rect = drw->rects; |
| 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 pitchropcpp = (sarea_priv->pitch * cpp) | |
| (0xcc << 16) | (cpp << 23) | |
| (1 << 24); |
| RING_LOCALS; |
| |
| i915_kernel_lost_context(dev); |
| |
| 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; |
| |
| for (i = 0; i < num_rects; i++, rect++) { |
| BEGIN_LP_RING(8); |
| |
| OUT_RING(cmd); |
| OUT_RING(pitchropcpp); |
| OUT_RING((rect->y1 << 16) | rect->x1); |
| OUT_RING((rect->y2 << 16) | rect->x2); |
| OUT_RING(sarea_priv->front_offset); |
| OUT_RING((rect->y1 << 16) | rect->x1); |
| OUT_RING(pitchropcpp & 0xffff); |
| OUT_RING(sarea_priv->back_offset); |
| |
| ADVANCE_LP_RING(); |
| } |
| } |
| |
| spin_unlock(&dev->drw_lock); |
| |
| spin_lock(&dev_priv->swaps_lock); |
| |
| list_del(list); |
| |
| drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER); |
| |
| dev_priv->swaps_pending--; |
| } |
| } |
| |
| spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags); |
| } |
| |
| irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) |
| { |
| drm_device_t *dev = (drm_device_t *) arg; |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u16 temp; |
| |
| temp = I915_READ16(I915REG_INT_IDENTITY_R); |
| |
| temp &= (USER_INT_FLAG | VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG); |
| |
| DRM_DEBUG("%s flag=%08x\n", __FUNCTION__, temp); |
| |
| if (temp == 0) |
| return IRQ_NONE; |
| |
| I915_WRITE16(I915REG_INT_IDENTITY_R, temp); |
| |
| dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); |
| |
| if (temp & USER_INT_FLAG) |
| DRM_WAKEUP(&dev_priv->irq_queue); |
| |
| if (temp & (VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG)) { |
| int vblank_pipe = dev_priv->vblank_pipe; |
| |
| if ((vblank_pipe & |
| (DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B)) |
| == (DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B)) { |
| if (temp & VSYNC_PIPEA_FLAG) |
| atomic_inc(&dev->vbl_received); |
| if (temp & VSYNC_PIPEB_FLAG) |
| atomic_inc(&dev->vbl_received2); |
| } else if (((temp & VSYNC_PIPEA_FLAG) && |
| (vblank_pipe & DRM_I915_VBLANK_PIPE_A)) || |
| ((temp & VSYNC_PIPEB_FLAG) && |
| (vblank_pipe & DRM_I915_VBLANK_PIPE_B))) |
| atomic_inc(&dev->vbl_received); |
| |
| DRM_WAKEUP(&dev->vbl_queue); |
| drm_vbl_send_signals(dev); |
| |
| if (dev_priv->swaps_pending > 0) |
| drm_locked_tasklet(dev, i915_vblank_tasklet); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int i915_emit_irq(drm_device_t * dev) |
| { |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| RING_LOCALS; |
| |
| i915_kernel_lost_context(dev); |
| |
| DRM_DEBUG("%s\n", __FUNCTION__); |
| |
| dev_priv->sarea_priv->last_enqueue = ++dev_priv->counter; |
| |
| if (dev_priv->counter > 0x7FFFFFFFUL) |
| dev_priv->sarea_priv->last_enqueue = dev_priv->counter = 1; |
| |
| BEGIN_LP_RING(6); |
| OUT_RING(CMD_STORE_DWORD_IDX); |
| OUT_RING(20); |
| OUT_RING(dev_priv->counter); |
| OUT_RING(0); |
| OUT_RING(0); |
| OUT_RING(GFX_OP_USER_INTERRUPT); |
| ADVANCE_LP_RING(); |
| |
| return dev_priv->counter; |
| } |
| |
| static int i915_wait_irq(drm_device_t * dev, int irq_nr) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int ret = 0; |
| |
| DRM_DEBUG("%s irq_nr=%d breadcrumb=%d\n", __FUNCTION__, irq_nr, |
| READ_BREADCRUMB(dev_priv)); |
| |
| if (READ_BREADCRUMB(dev_priv) >= irq_nr) |
| return 0; |
| |
| dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; |
| |
| DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ, |
| READ_BREADCRUMB(dev_priv) >= irq_nr); |
| |
| if (ret == DRM_ERR(EBUSY)) { |
| DRM_ERROR("%s: EBUSY -- rec: %d emitted: %d\n", |
| __FUNCTION__, |
| READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); |
| } |
| |
| dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); |
| return ret; |
| } |
| |
| static int i915_driver_vblank_do_wait(drm_device_t *dev, unsigned int *sequence, |
| atomic_t *counter) |
| { |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| unsigned int cur_vblank; |
| int ret = 0; |
| |
| if (!dev_priv) { |
| DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| return DRM_ERR(EINVAL); |
| } |
| |
| DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, |
| (((cur_vblank = atomic_read(counter)) |
| - *sequence) <= (1<<23))); |
| |
| *sequence = cur_vblank; |
| |
| return ret; |
| } |
| |
| |
| int i915_driver_vblank_wait(drm_device_t *dev, unsigned int *sequence) |
| { |
| return i915_driver_vblank_do_wait(dev, sequence, &dev->vbl_received); |
| } |
| |
| int i915_driver_vblank_wait2(drm_device_t *dev, unsigned int *sequence) |
| { |
| return i915_driver_vblank_do_wait(dev, sequence, &dev->vbl_received2); |
| } |
| |
| /* Needs the lock as it touches the ring. |
| */ |
| int i915_irq_emit(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| drm_i915_irq_emit_t emit; |
| int result; |
| |
| LOCK_TEST_WITH_RETURN(dev, filp); |
| |
| if (!dev_priv) { |
| DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| return DRM_ERR(EINVAL); |
| } |
| |
| DRM_COPY_FROM_USER_IOCTL(emit, (drm_i915_irq_emit_t __user *) data, |
| sizeof(emit)); |
| |
| result = i915_emit_irq(dev); |
| |
| if (DRM_COPY_TO_USER(emit.irq_seq, &result, sizeof(int))) { |
| DRM_ERROR("copy_to_user\n"); |
| return DRM_ERR(EFAULT); |
| } |
| |
| return 0; |
| } |
| |
| /* Doesn't need the hardware lock. |
| */ |
| int i915_irq_wait(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| drm_i915_irq_wait_t irqwait; |
| |
| if (!dev_priv) { |
| DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| return DRM_ERR(EINVAL); |
| } |
| |
| DRM_COPY_FROM_USER_IOCTL(irqwait, (drm_i915_irq_wait_t __user *) data, |
| sizeof(irqwait)); |
| |
| return i915_wait_irq(dev, irqwait.irq_seq); |
| } |
| |
| static void i915_enable_interrupt (drm_device_t *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u16 flag; |
| |
| flag = 0; |
| if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_A) |
| flag |= VSYNC_PIPEA_FLAG; |
| if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_B) |
| flag |= VSYNC_PIPEB_FLAG; |
| |
| I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG | flag); |
| } |
| |
| /* Set the vblank monitor pipe |
| */ |
| int i915_vblank_pipe_set(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| drm_i915_vblank_pipe_t pipe; |
| |
| if (!dev_priv) { |
| DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| return DRM_ERR(EINVAL); |
| } |
| |
| DRM_COPY_FROM_USER_IOCTL(pipe, (drm_i915_vblank_pipe_t __user *) data, |
| sizeof(pipe)); |
| |
| if (pipe.pipe & ~(DRM_I915_VBLANK_PIPE_A|DRM_I915_VBLANK_PIPE_B)) { |
| DRM_ERROR("%s called with invalid pipe 0x%x\n", |
| __FUNCTION__, pipe.pipe); |
| return DRM_ERR(EINVAL); |
| } |
| |
| dev_priv->vblank_pipe = pipe.pipe; |
| |
| i915_enable_interrupt (dev); |
| |
| return 0; |
| } |
| |
| int i915_vblank_pipe_get(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| drm_i915_vblank_pipe_t pipe; |
| u16 flag; |
| |
| if (!dev_priv) { |
| DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| return DRM_ERR(EINVAL); |
| } |
| |
| flag = I915_READ(I915REG_INT_ENABLE_R); |
| pipe.pipe = 0; |
| if (flag & VSYNC_PIPEA_FLAG) |
| pipe.pipe |= DRM_I915_VBLANK_PIPE_A; |
| if (flag & VSYNC_PIPEB_FLAG) |
| pipe.pipe |= DRM_I915_VBLANK_PIPE_B; |
| DRM_COPY_TO_USER_IOCTL((drm_i915_vblank_pipe_t __user *) data, pipe, |
| sizeof(pipe)); |
| return 0; |
| } |
| |
| /** |
| * Schedule buffer swap at given vertical blank. |
| */ |
| int i915_vblank_swap(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| drm_i915_vblank_swap_t swap; |
| drm_i915_vbl_swap_t *vbl_swap; |
| unsigned int pipe, seqtype, curseq; |
| unsigned long irqflags; |
| struct list_head *list; |
| |
| if (!dev_priv) { |
| DRM_ERROR("%s called with no initialization\n", __func__); |
| return DRM_ERR(EINVAL); |
| } |
| |
| if (dev_priv->sarea_priv->rotation) { |
| DRM_DEBUG("Rotation not supported\n"); |
| return DRM_ERR(EINVAL); |
| } |
| |
| DRM_COPY_FROM_USER_IOCTL(swap, (drm_i915_vblank_swap_t __user *) data, |
| sizeof(swap)); |
| |
| 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 DRM_ERR(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 DRM_ERR(EINVAL); |
| } |
| |
| spin_lock_irqsave(&dev->drw_lock, irqflags); |
| |
| if (!drm_get_drawable_info(dev, swap.drawable)) { |
| spin_unlock_irqrestore(&dev->drw_lock, irqflags); |
| DRM_ERROR("Invalid drawable ID %d\n", swap.drawable); |
| return DRM_ERR(EINVAL); |
| } |
| |
| spin_unlock_irqrestore(&dev->drw_lock, irqflags); |
| |
| curseq = atomic_read(pipe ? &dev->vbl_received2 : &dev->vbl_received); |
| |
| 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 DRM_ERR(EINVAL); |
| } |
| } |
| |
| spin_lock_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->pipe == pipe && |
| vbl_swap->sequence == swap.sequence) { |
| spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags); |
| DRM_DEBUG("Already scheduled\n"); |
| return 0; |
| } |
| } |
| |
| spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags); |
| |
| if (dev_priv->swaps_pending >= 100) { |
| DRM_DEBUG("Too many swaps queued\n"); |
| return DRM_ERR(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 DRM_ERR(ENOMEM); |
| } |
| |
| DRM_DEBUG("\n"); |
| |
| vbl_swap->drw_id = swap.drawable; |
| vbl_swap->pipe = pipe; |
| vbl_swap->sequence = swap.sequence; |
| |
| spin_lock_irqsave(&dev_priv->swaps_lock, irqflags); |
| |
| list_add_tail((struct list_head *)vbl_swap, &dev_priv->vbl_swaps.head); |
| dev_priv->swaps_pending++; |
| |
| spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags); |
| |
| DRM_COPY_TO_USER_IOCTL((drm_i915_vblank_swap_t __user *) data, swap, |
| sizeof(swap)); |
| |
| return 0; |
| } |
| |
| /* drm_dma.h hooks |
| */ |
| void i915_driver_irq_preinstall(drm_device_t * dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| |
| I915_WRITE16(I915REG_HWSTAM, 0xfffe); |
| I915_WRITE16(I915REG_INT_MASK_R, 0x0); |
| I915_WRITE16(I915REG_INT_ENABLE_R, 0x0); |
| } |
| |
| void i915_driver_irq_postinstall(drm_device_t * dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| |
| dev_priv->swaps_lock = SPIN_LOCK_UNLOCKED; |
| INIT_LIST_HEAD(&dev_priv->vbl_swaps.head); |
| dev_priv->swaps_pending = 0; |
| |
| if (!dev_priv->vblank_pipe) |
| dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A; |
| i915_enable_interrupt(dev); |
| DRM_INIT_WAITQUEUE(&dev_priv->irq_queue); |
| } |
| |
| void i915_driver_irq_uninstall(drm_device_t * dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u16 temp; |
| |
| if (!dev_priv) |
| return; |
| |
| I915_WRITE16(I915REG_HWSTAM, 0xffff); |
| I915_WRITE16(I915REG_INT_MASK_R, 0xffff); |
| I915_WRITE16(I915REG_INT_ENABLE_R, 0x0); |
| |
| temp = I915_READ16(I915REG_INT_IDENTITY_R); |
| I915_WRITE16(I915REG_INT_IDENTITY_R, temp); |
| } |