From 0b60aad8a5f1e6d38bf2d254fa5209492157e344 Mon Sep 17 00:00:00 2001 From: Gareth Hughes Date: Mon, 12 Mar 2001 18:18:06 +0000 Subject: Try that again... --- linux/mga_dma.c | 40 +++++++++++++++++++--------------------- 1 file changed, 19 insertions(+), 21 deletions(-) (limited to 'linux/mga_dma.c') diff --git a/linux/mga_dma.c b/linux/mga_dma.c index 952617c6..c76e54eb 100644 --- a/linux/mga_dma.c +++ b/linux/mga_dma.c @@ -178,7 +178,7 @@ void mga_do_dma_flush( drm_mga_private_t *dev_priv ) primary->last_flush = primary->tail; - head = *primary->head; + head = MGA_READ( MGA_PRIMADDRESS ); if ( head <= tail ) { primary->space = primary->size - primary->tail; @@ -218,7 +218,7 @@ void mga_do_dma_wrap_start( drm_mga_private_t *dev_priv ) primary->last_flush = 0; primary->last_wrap++; - head = *primary->head; + head = MGA_READ( MGA_PRIMADDRESS ); if ( head == dev_priv->primary->offset ) { primary->space = primary->size; @@ -240,7 +240,6 @@ void mga_do_dma_wrap_start( drm_mga_private_t *dev_priv ) void mga_do_dma_wrap_end( drm_mga_private_t *dev_priv ) { - drm_mga_primary_buffer_t *primary = &dev_priv->prim; drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv; u32 head = dev_priv->primary->offset; DRM_DEBUG( "%s:\n", __FUNCTION__ ); @@ -248,8 +247,6 @@ void mga_do_dma_wrap_end( drm_mga_private_t *dev_priv ) sarea_priv->last_wrap++; DRM_DEBUG( " wrap = %d\n", sarea_priv->last_wrap ); - *primary->head = head; - mga_flush_write_combine(); MGA_WRITE( MGA_PRIMADDRESS, head | MGA_DMA_GENERAL ); @@ -272,7 +269,7 @@ static void mga_freelist_print( drm_device_t *dev ) DRM_INFO( "\n" ); DRM_INFO( "current dispatch: last=0x%x done=0x%x\n", dev_priv->sarea_priv->last_dispatch, - (unsigned int)(*dev_priv->prim.head - + (unsigned int)(MGA_READ( MGA_PRIMADDRESS ) - dev_priv->primary->offset) ); DRM_INFO( "current freelist:\n" ); @@ -375,7 +372,7 @@ static drm_buf_t *mga_freelist_get( drm_device_t *dev ) u32 head, wrap; DRM_DEBUG( "%s:\n", __FUNCTION__ ); - head = *dev_priv->prim.head; + head = MGA_READ( MGA_PRIMADDRESS ); wrap = dev_priv->sarea_priv->last_wrap; DRM_DEBUG( " tail=0x%06lx %d\n", @@ -403,7 +400,7 @@ int mga_freelist_put( drm_device_t *dev, drm_buf_t *buf ) { drm_mga_private_t *dev_priv = dev->dev_private; drm_mga_buf_priv_t *buf_priv = buf->dev_private; - drm_mga_freelist_t *head, *next, *prev; + drm_mga_freelist_t *head, *entry, *prev; DRM_DEBUG( "%s: age=0x%06lx wrap=%d\n", __FUNCTION__, @@ -411,22 +408,23 @@ int mga_freelist_put( drm_device_t *dev, drm_buf_t *buf ) dev_priv->primary->offset, buf_priv->list_entry->age.wrap ); - /* Put buffer on the head + 1, as the head is a sentinal. - */ - - next = buf_priv->list_entry; + entry = buf_priv->list_entry; head = dev_priv->head; - prev = head->next; if ( buf_priv->list_entry->age.head == MGA_BUFFER_USED ) { - SET_AGE( &next->age, MGA_BUFFER_FREE, 0 ); + SET_AGE( &entry->age, MGA_BUFFER_FREE, 0 ); + prev = dev_priv->tail; + prev->next = entry; + entry->prev = prev; + entry->next = NULL; + } else { + prev = head->next; + head->next = entry; + prev->prev = entry; + entry->prev = head; + entry->next = prev; } - head->next = next; - prev->prev = next; - next->prev = head; - next->next = prev; - return 0; } @@ -520,7 +518,6 @@ static int mga_do_init_dma( drm_device_t *dev, drm_mga_init_t *init ) + dev_priv->primary->size); dev_priv->prim.size = dev_priv->primary->size; - dev_priv->prim.head = &dev_priv->prim.status[0]; dev_priv->prim.tail = 0; dev_priv->prim.space = dev_priv->prim.size; @@ -616,10 +613,11 @@ int mga_dma_flush( struct inode *inode, struct file *filp, WRAP_TEST_WITH_RETURN( dev_priv ); +#if 0 if ( lock.flags & (_DRM_LOCK_FLUSH | _DRM_LOCK_FLUSH_ALL) ) { mga_do_dma_flush( dev_priv ); } - +#endif if ( lock.flags & _DRM_LOCK_QUIESCENT ) { return mga_do_wait_for_idle( dev_priv ); } else { -- cgit v1.2.3