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/* mach64_dma.c -- DMA support for mach64 (Rage Pro) driver -*- linux-c -*-
* Created: Sun Dec 03 19:20:26 2000 by gareth@valinux.com
*
* Copyright 2000 Gareth Hughes
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* GARETH HUGHES 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.
*
* Authors:
* Gareth Hughes <gareth@valinux.com>
*/
#define __NO_VERSION__
#include "drmP.h"
#include "mach64_drv.h"
#include <linux/interrupt.h> /* For task queue support */
#include <linux/delay.h>
#define DO_REMAP(_m) (_m)->handle = drm_ioremap( (_m)->offset, (_m)->size )
#define DO_REMAPFREE(_m) \
do { \
if ( (_m)->handle && (_m)->size ) \
drm_ioremapfree( (_m)->handle, (_m)->size ); \
} while (0)
#define DO_FIND_MAP(_m, _o) \
do { \
int _i; \
for ( _i = 0 ; _i < dev->map_count ; _i++ ) { \
if ( dev->maplist[_i]->offset == _o ) { \
_m = dev->maplist[_i]; \
break; \
} \
} \
} while (0)
/* ================================================================
* Engine control
*/
int mach64_do_wait_for_fifo( drm_mach64_private_t *dev_priv, int entries )
{
int i;
for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) {
int slots = (MACH64_READ( MACH64_FIFO_STAT ) &
MACH64_FIFO_SLOT_MASK);
if ( slots <= (0x8000 >> entries) ) return 0;
udelay( 1 );
}
DRM_ERROR( "%s failed!\n", __FUNCTION__ );
return -EBUSY;
}
static int mach64_do_wait_for_idle( drm_mach64_private_t *dev_priv )
{
int i, ret;
ret = mach64_do_wait_for_fifo( dev_priv, 16 );
if ( ret ) return ret;
for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) {
if ( !(MACH64_READ( MACH64_GUI_STAT ) & MACH64_GUI_ACTIVE) ) {
return 0;
}
udelay( 1 );
}
DRM_ERROR( "%s failed!\n", __FUNCTION__ );
return -EBUSY;
}
static int mach64_do_dma_init( drm_device_t *dev, drm_mach64_init_t *init )
{
drm_mach64_private_t *dev_priv;
u32 tmp;
DRM_DEBUG( "%s\n", __FUNCTION__ );
dev_priv = drm_alloc( sizeof(drm_mach64_private_t), DRM_MEM_DRIVER );
if ( dev_priv == NULL )
return -ENOMEM;
dev->dev_private = (void *) dev_priv;
memset( dev_priv, 0, sizeof(drm_mach64_private_t) );
dev_priv->fb_bpp = init->fb_bpp;
dev_priv->front_offset = init->front_offset;
dev_priv->front_pitch = init->front_pitch;
dev_priv->back_offset = init->back_offset;
dev_priv->back_pitch = init->back_pitch;
dev_priv->depth_bpp = init->depth_bpp;
dev_priv->depth_offset = init->depth_offset;
dev_priv->depth_pitch = init->depth_pitch;
dev_priv->front_offset_pitch = (((dev_priv->front_pitch/8) << 22) |
(dev_priv->front_offset >> 3));
dev_priv->back_offset_pitch = (((dev_priv->back_pitch/8) << 22) |
(dev_priv->back_offset >> 3));
dev_priv->depth_offset_pitch = (((dev_priv->depth_pitch/8) << 22) |
(dev_priv->depth_offset >> 3));
dev_priv->usec_timeout = 1000000;
dev_priv->sarea = dev->maplist[0];
dev_priv->sarea_priv = (drm_mach64_sarea_t *)
((u8 *)dev_priv->sarea->handle +
init->sarea_priv_offset);
DO_FIND_MAP( dev_priv->fb, init->fb_offset );
DO_FIND_MAP( dev_priv->mmio, init->mmio_offset );
/* FIXME: Do the scratch register test for now, can remove
* later on.
*/
tmp = MACH64_READ( MACH64_SCRATCH_REG0 );
MACH64_WRITE( MACH64_SCRATCH_REG0, 0x55555555 );
if ( MACH64_READ( MACH64_SCRATCH_REG0 ) == 0x55555555 ) {
MACH64_WRITE( MACH64_SCRATCH_REG0, 0xaaaaaaaa );
if ( MACH64_READ( MACH64_SCRATCH_REG0 ) != 0xaaaaaaaa ) {
DRM_ERROR( "2nd scratch reg failed!\n" );
}
} else {
DRM_ERROR( "1st scratch reg failed!\n" );
}
MACH64_WRITE( MACH64_SCRATCH_REG0, tmp );
return 0;
}
static int mach64_do_dma_cleanup( drm_device_t *dev )
{
DRM_DEBUG( "%s\n", __FUNCTION__ );
if ( dev->dev_private ) {
drm_mach64_private_t *dev_priv = dev->dev_private;
drm_free( dev_priv, sizeof(drm_mach64_private_t),
DRM_MEM_DRIVER );
dev->dev_private = NULL;
}
return 0;
}
int mach64_dma_init( struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg )
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_mach64_init_t init;
if ( copy_from_user( &init, (drm_mach64_init_t *)arg, sizeof(init) ) )
return -EFAULT;
switch ( init.func ) {
case MACH64_INIT_DMA:
return mach64_do_dma_init( dev, &init );
case MACH64_CLEANUP_DMA:
return mach64_do_dma_cleanup( dev );
}
return -EINVAL;
}
int mach64_dma_idle( struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg )
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_mach64_private_t *dev_priv = dev->dev_private;
DRM_DEBUG( "%s\n", __FUNCTION__ );
if ( !_DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ) ||
dev->lock.pid != current->pid ) {
DRM_ERROR( "%s called without lock held\n", __FUNCTION__ );
return -EINVAL;
}
return mach64_do_wait_for_idle( dev_priv );
}
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