drm/vmwgfx: Add command buffer support v3
Add command buffer support.
Currently we don't implement preemption or fancy error handling.
Tested with a couple of mesa-demos, compiz/unity and viewperf maya-03.
v2:
- Synchronize with pending work at command buffer manager takedown.
- Add an interface to flush the current command buffer for latency-critical
command batches and apply it to framebuffer dirtying.
v3:
- Minor fixes of definitions and typos to address reviews.
- Removed new or moved branch predictor hints.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c b/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c
index 9fe9827..87964bb 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c
@@ -56,6 +56,9 @@
if (masked_status & SVGA_IRQFLAG_FIFO_PROGRESS)
wake_up_all(&dev_priv->fifo_queue);
+ if (masked_status & (SVGA_IRQFLAG_COMMAND_BUFFER |
+ SVGA_IRQFLAG_ERROR))
+ vmw_cmdbuf_tasklet_schedule(dev_priv->cman);
return IRQ_HANDLED;
}
@@ -131,8 +134,16 @@
* Block command submission while waiting for idle.
*/
- if (fifo_idle)
+ if (fifo_idle) {
down_read(&fifo_state->rwsem);
+ if (dev_priv->cman) {
+ ret = vmw_cmdbuf_idle(dev_priv->cman, interruptible,
+ 10*HZ);
+ if (ret)
+ goto out_err;
+ }
+ }
+
signal_seq = atomic_read(&dev_priv->marker_seq);
ret = 0;
@@ -171,6 +182,7 @@
iowrite32(signal_seq, fifo_mem + SVGA_FIFO_FENCE);
}
wake_up_all(&dev_priv->fence_queue);
+out_err:
if (fifo_idle)
up_read(&fifo_state->rwsem);
@@ -315,3 +327,30 @@
status = inl(dev_priv->io_start + VMWGFX_IRQSTATUS_PORT);
outl(status, dev_priv->io_start + VMWGFX_IRQSTATUS_PORT);
}
+
+void vmw_generic_waiter_add(struct vmw_private *dev_priv,
+ u32 flag, int *waiter_count)
+{
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&dev_priv->irq_lock, irq_flags);
+ if ((*waiter_count)++ == 0) {
+ outl(flag, dev_priv->io_start + VMWGFX_IRQSTATUS_PORT);
+ dev_priv->irq_mask |= flag;
+ vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask);
+ }
+ spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags);
+}
+
+void vmw_generic_waiter_remove(struct vmw_private *dev_priv,
+ u32 flag, int *waiter_count)
+{
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&dev_priv->irq_lock, irq_flags);
+ if (--(*waiter_count) == 0) {
+ dev_priv->irq_mask &= ~flag;
+ vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask);
+ }
+ spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags);
+}