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/************************************************************************** |
* |
* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA |
* 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 |
* THE COPYRIGHT HOLDERS, AUTHORS 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. |
* |
**************************************************************************/ |
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#include <drm/drmP.h> |
#include "vmwgfx_drv.h" |
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#define TASK_INTERRUPTIBLE 1 |
#define TASK_UNINTERRUPTIBLE 2 |
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#define VMW_FENCE_WRAP (1 << 24) |
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irqreturn_t vmw_irq_handler(DRM_IRQ_ARGS) |
{ |
struct drm_device *dev = (struct drm_device *)arg; |
struct vmw_private *dev_priv = vmw_priv(dev); |
uint32_t status, masked_status; |
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spin_lock(&dev_priv->irq_lock); |
status = inl(dev_priv->io_start + VMWGFX_IRQSTATUS_PORT); |
masked_status = status & dev_priv->irq_mask; |
spin_unlock(&dev_priv->irq_lock); |
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if (likely(status)) |
outl(status, dev_priv->io_start + VMWGFX_IRQSTATUS_PORT); |
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if (!masked_status) |
return IRQ_NONE; |
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if (masked_status & (SVGA_IRQFLAG_ANY_FENCE | |
SVGA_IRQFLAG_FENCE_GOAL)) { |
vmw_fences_update(dev_priv->fman); |
wake_up_all(&dev_priv->fence_queue); |
} |
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if (masked_status & SVGA_IRQFLAG_FIFO_PROGRESS) |
wake_up_all(&dev_priv->fifo_queue); |
|
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return IRQ_HANDLED; |
} |
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static bool vmw_fifo_idle(struct vmw_private *dev_priv, uint32_t seqno) |
{ |
uint32_t busy; |
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mutex_lock(&dev_priv->hw_mutex); |
busy = vmw_read(dev_priv, SVGA_REG_BUSY); |
mutex_unlock(&dev_priv->hw_mutex); |
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return (busy == 0); |
} |
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void vmw_update_seqno(struct vmw_private *dev_priv, |
struct vmw_fifo_state *fifo_state) |
{ |
__le32 __iomem *fifo_mem = dev_priv->mmio_virt; |
uint32_t seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE); |
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if (dev_priv->last_read_seqno != seqno) { |
dev_priv->last_read_seqno = seqno; |
vmw_marker_pull(&fifo_state->marker_queue, seqno); |
vmw_fences_update(dev_priv->fman); |
} |
} |
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bool vmw_seqno_passed(struct vmw_private *dev_priv, |
uint32_t seqno) |
{ |
struct vmw_fifo_state *fifo_state; |
bool ret; |
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if (likely(dev_priv->last_read_seqno - seqno < VMW_FENCE_WRAP)) |
return true; |
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fifo_state = &dev_priv->fifo; |
vmw_update_seqno(dev_priv, fifo_state); |
if (likely(dev_priv->last_read_seqno - seqno < VMW_FENCE_WRAP)) |
return true; |
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if (!(fifo_state->capabilities & SVGA_FIFO_CAP_FENCE) && |
vmw_fifo_idle(dev_priv, seqno)) |
return true; |
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/** |
* Then check if the seqno is higher than what we've actually |
* emitted. Then the fence is stale and signaled. |
*/ |
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ret = ((atomic_read(&dev_priv->marker_seq) - seqno) |
> VMW_FENCE_WRAP); |
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return ret; |
} |
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int vmw_fallback_wait(struct vmw_private *dev_priv, |
bool lazy, |
bool fifo_idle, |
uint32_t seqno, |
bool interruptible, |
unsigned long timeout) |
{ |
struct vmw_fifo_state *fifo_state = &dev_priv->fifo; |
|
uint32_t count = 0; |
uint32_t signal_seq; |
int ret; |
unsigned long end_jiffies = GetTimerTicks() + timeout; |
bool (*wait_condition)(struct vmw_private *, uint32_t); |
DEFINE_WAIT(__wait); |
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wait_condition = (fifo_idle) ? &vmw_fifo_idle : |
&vmw_seqno_passed; |
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/** |
* Block command submission while waiting for idle. |
*/ |
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// if (fifo_idle) |
// down_read(&fifo_state->rwsem); |
signal_seq = atomic_read(&dev_priv->marker_seq); |
ret = 0; |
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for (;;) { |
// prepare_to_wait(&dev_priv->fence_queue, &__wait, |
// (interruptible) ? |
// TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); |
if (wait_condition(dev_priv, seqno)) |
break; |
if (time_after_eq(GetTimerTicks(), end_jiffies)) { |
DRM_ERROR("SVGA device lockup.\n"); |
break; |
} |
if (lazy) |
delay(1); |
else if ((++count & 0x0F) == 0) { |
/** |
* FIXME: Use schedule_hr_timeout here for |
* newer kernels and lower CPU utilization. |
*/ |
|
delay(1); |
} |
} |
// finish_wait(&dev_priv->fence_queue, &__wait); |
if (ret == 0 && fifo_idle) { |
__le32 __iomem *fifo_mem = dev_priv->mmio_virt; |
iowrite32(signal_seq, fifo_mem + SVGA_FIFO_FENCE); |
} |
wake_up_all(&dev_priv->fence_queue); |
// if (fifo_idle) |
// up_read(&fifo_state->rwsem); |
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return ret; |
} |
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void vmw_seqno_waiter_add(struct vmw_private *dev_priv) |
{ |
mutex_lock(&dev_priv->hw_mutex); |
if (dev_priv->fence_queue_waiters++ == 0) { |
unsigned long irq_flags; |
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spin_lock_irqsave(&dev_priv->irq_lock, irq_flags); |
outl(SVGA_IRQFLAG_ANY_FENCE, |
dev_priv->io_start + VMWGFX_IRQSTATUS_PORT); |
dev_priv->irq_mask |= SVGA_IRQFLAG_ANY_FENCE; |
vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask); |
spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags); |
} |
mutex_unlock(&dev_priv->hw_mutex); |
} |
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void vmw_seqno_waiter_remove(struct vmw_private *dev_priv) |
{ |
mutex_lock(&dev_priv->hw_mutex); |
if (--dev_priv->fence_queue_waiters == 0) { |
unsigned long irq_flags; |
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spin_lock_irqsave(&dev_priv->irq_lock, irq_flags); |
dev_priv->irq_mask &= ~SVGA_IRQFLAG_ANY_FENCE; |
vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask); |
spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags); |
} |
mutex_unlock(&dev_priv->hw_mutex); |
} |
|
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void vmw_goal_waiter_add(struct vmw_private *dev_priv) |
{ |
mutex_lock(&dev_priv->hw_mutex); |
if (dev_priv->goal_queue_waiters++ == 0) { |
unsigned long irq_flags; |
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spin_lock_irqsave(&dev_priv->irq_lock, irq_flags); |
outl(SVGA_IRQFLAG_FENCE_GOAL, |
dev_priv->io_start + VMWGFX_IRQSTATUS_PORT); |
dev_priv->irq_mask |= SVGA_IRQFLAG_FENCE_GOAL; |
vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask); |
spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags); |
} |
mutex_unlock(&dev_priv->hw_mutex); |
} |
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void vmw_goal_waiter_remove(struct vmw_private *dev_priv) |
{ |
mutex_lock(&dev_priv->hw_mutex); |
if (--dev_priv->goal_queue_waiters == 0) { |
unsigned long irq_flags; |
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spin_lock_irqsave(&dev_priv->irq_lock, irq_flags); |
dev_priv->irq_mask &= ~SVGA_IRQFLAG_FENCE_GOAL; |
vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask); |
spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags); |
} |
mutex_unlock(&dev_priv->hw_mutex); |
} |
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int vmw_wait_seqno(struct vmw_private *dev_priv, |
bool lazy, uint32_t seqno, |
bool interruptible, unsigned long timeout) |
{ |
long ret; |
struct vmw_fifo_state *fifo = &dev_priv->fifo; |
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if (likely(dev_priv->last_read_seqno - seqno < VMW_FENCE_WRAP)) |
return 0; |
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if (likely(vmw_seqno_passed(dev_priv, seqno))) |
return 0; |
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vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); |
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if (!(fifo->capabilities & SVGA_FIFO_CAP_FENCE)) |
return vmw_fallback_wait(dev_priv, lazy, true, seqno, |
interruptible, timeout); |
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if (!(dev_priv->capabilities & SVGA_CAP_IRQMASK)) |
return vmw_fallback_wait(dev_priv, lazy, false, seqno, |
interruptible, timeout); |
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vmw_seqno_waiter_add(dev_priv); |
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if (interruptible) |
ret = wait_event_interruptible_timeout |
(dev_priv->fence_queue, |
vmw_seqno_passed(dev_priv, seqno), |
timeout); |
else |
ret = wait_event_timeout |
(dev_priv->fence_queue, |
vmw_seqno_passed(dev_priv, seqno), |
timeout); |
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vmw_seqno_waiter_remove(dev_priv); |
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if (unlikely(ret == 0)) |
ret = -EBUSY; |
else if (likely(ret > 0)) |
ret = 0; |
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return ret; |
} |
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void vmw_irq_preinstall(struct drm_device *dev) |
{ |
struct vmw_private *dev_priv = vmw_priv(dev); |
uint32_t status; |
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if (!(dev_priv->capabilities & SVGA_CAP_IRQMASK)) |
return; |
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spin_lock_init(&dev_priv->irq_lock); |
status = inl(dev_priv->io_start + VMWGFX_IRQSTATUS_PORT); |
outl(status, dev_priv->io_start + VMWGFX_IRQSTATUS_PORT); |
} |
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int vmw_irq_postinstall(struct drm_device *dev) |
{ |
return 0; |
} |
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void vmw_irq_uninstall(struct drm_device *dev) |
{ |
struct vmw_private *dev_priv = vmw_priv(dev); |
uint32_t status; |
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if (!(dev_priv->capabilities & SVGA_CAP_IRQMASK)) |
return; |
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mutex_lock(&dev_priv->hw_mutex); |
vmw_write(dev_priv, SVGA_REG_IRQMASK, 0); |
mutex_unlock(&dev_priv->hw_mutex); |
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status = inl(dev_priv->io_start + VMWGFX_IRQSTATUS_PORT); |
outl(status, dev_priv->io_start + VMWGFX_IRQSTATUS_PORT); |
} |
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int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key) |
{ |
list_del_init(&wait->task_list); |
return 1; |
} |
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