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-rw-r--r--linux/mga_dma.c815
1 files changed, 0 insertions, 815 deletions
diff --git a/linux/mga_dma.c b/linux/mga_dma.c
deleted file mode 100644
index 525975a8..00000000
--- a/linux/mga_dma.c
+++ /dev/null
@@ -1,815 +0,0 @@
-/* mga_dma.c -- DMA support for mga g200/g400 -*- linux-c -*-
- * Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
- *
- * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
- * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
- * 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
- * PRECISION INSIGHT 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.
- *
- * Authors:
- * Rickard E. (Rik) Faith <faith@valinux.com>
- * Jeff Hartmann <jhartmann@valinux.com>
- * Keith Whitwell <keithw@valinux.com>
- *
- * Rewritten by:
- * Gareth Hughes <gareth@valinux.com>
- */
-
-#define __NO_VERSION__
-#include "mga.h"
-#include "drmP.h"
-#include "drm.h"
-#include "mga_drm.h"
-#include "mga_drv.h"
-
-#include <linux/interrupt.h> /* For task queue support */
-#include <linux/delay.h>
-
-#define MGA_DEFAULT_USEC_TIMEOUT 10000
-#define MGA_FREELIST_DEBUG 0
-
-
-/* ================================================================
- * Engine control
- */
-
-int mga_do_wait_for_idle( drm_mga_private_t *dev_priv )
-{
- u32 status = 0;
- int i;
- DRM_DEBUG( "%s\n", __FUNCTION__ );
-
- for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) {
- status = MGA_READ( MGA_STATUS ) & MGA_ENGINE_IDLE_MASK;
- if ( status == MGA_ENDPRDMASTS ) {
- MGA_WRITE8( MGA_CRTC_INDEX, 0 );
- return 0;
- }
- udelay( 1 );
- }
-
-#if MGA_DMA_DEBUG
- DRM_ERROR( "failed!\n" );
- DRM_INFO( " status=0x%08x\n", status );
-#endif
- return -EBUSY;
-}
-
-int mga_do_dma_idle( drm_mga_private_t *dev_priv )
-{
- u32 status = 0;
- int i;
- DRM_DEBUG( "%s\n", __FUNCTION__ );
-
- for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) {
- status = MGA_READ( MGA_STATUS ) & MGA_DMA_IDLE_MASK;
- if ( status == MGA_ENDPRDMASTS ) return 0;
- udelay( 1 );
- }
-
-#if MGA_DMA_DEBUG
- DRM_ERROR( "failed! status=0x%08x\n", status );
-#endif
- return -EBUSY;
-}
-
-int mga_do_dma_reset( drm_mga_private_t *dev_priv )
-{
- drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
- drm_mga_primary_buffer_t *primary = &dev_priv->prim;
-
- DRM_DEBUG( "%s\n", __FUNCTION__ );
-
- /* The primary DMA stream should look like new right about now.
- */
- primary->tail = 0;
- primary->space = primary->size;
- primary->last_flush = 0;
-
- sarea_priv->last_wrap = 0;
-
- /* FIXME: Reset counters, buffer ages etc...
- */
-
- /* FIXME: What else do we need to reinitialize? WARP stuff?
- */
-
- return 0;
-}
-
-int mga_do_engine_reset( drm_mga_private_t *dev_priv )
-{
- DRM_DEBUG( "%s\n", __FUNCTION__ );
-
- /* Okay, so we've completely screwed up and locked the engine.
- * How about we clean up after ourselves?
- */
- MGA_WRITE( MGA_RST, MGA_SOFTRESET );
- udelay( 15 ); /* Wait at least 10 usecs */
- MGA_WRITE( MGA_RST, 0 );
-
- /* Initialize the registers that get clobbered by the soft
- * reset. Many of the core register values survive a reset,
- * but the drawing registers are basically all gone.
- *
- * 3D clients should probably die after calling this. The X
- * server should reset the engine state to known values.
- */
-#if 0
- MGA_WRITE( MGA_PRIMPTR,
- virt_to_bus((void *)dev_priv->prim.status_page) |
- MGA_PRIMPTREN0 |
- MGA_PRIMPTREN1 );
-#endif
-
- MGA_WRITE( MGA_ICLEAR, MGA_SOFTRAPICLR );
- MGA_WRITE( MGA_IEN, MGA_SOFTRAPIEN );
-
- /* The primary DMA stream should look like new right about now.
- */
- mga_do_dma_reset( dev_priv );
-
- /* This bad boy will never fail.
- */
- return 0;
-}
-
-
-/* ================================================================
- * Primary DMA stream
- */
-
-void mga_do_dma_flush( drm_mga_private_t *dev_priv )
-{
- drm_mga_primary_buffer_t *primary = &dev_priv->prim;
- u32 head, tail;
- DMA_LOCALS;
- DRM_DEBUG( "%s:\n", __FUNCTION__ );
-
- if ( primary->tail == primary->last_flush ) {
- DRM_DEBUG( " bailing out...\n" );
- return;
- }
-
- tail = primary->tail + dev_priv->primary->offset;
-
- /* We need to pad the stream between flushes, as the card
- * actually (partially?) reads the first of these commands.
- * See page 4-16 in the G400 manual, middle of the page or so.
- */
- BEGIN_DMA( 1 );
-
- DMA_BLOCK( MGA_DMAPAD, 0x00000000,
- MGA_DMAPAD, 0x00000000,
- MGA_DMAPAD, 0x00000000,
- MGA_DMAPAD, 0x00000000 );
-
- ADVANCE_DMA();
-
- primary->last_flush = primary->tail;
-
- head = MGA_READ( MGA_PRIMADDRESS );
-
- if ( head <= tail ) {
- primary->space = primary->size - primary->tail;
- } else {
- primary->space = head - tail;
- }
-
- DRM_DEBUG( " head = 0x%06lx\n", head - dev_priv->primary->offset );
- DRM_DEBUG( " tail = 0x%06lx\n", tail - dev_priv->primary->offset );
- DRM_DEBUG( " space = 0x%06x\n", primary->space );
-
- mga_flush_write_combine();
- MGA_WRITE( MGA_PRIMEND, tail | MGA_PAGPXFER );
-
- DRM_DEBUG( "%s: done.\n", __FUNCTION__ );
-}
-
-void mga_do_dma_wrap_start( drm_mga_private_t *dev_priv )
-{
- drm_mga_primary_buffer_t *primary = &dev_priv->prim;
- u32 head, tail;
- DMA_LOCALS;
- DRM_DEBUG( "%s:\n", __FUNCTION__ );
-
- BEGIN_DMA_WRAP();
-
- DMA_BLOCK( MGA_DMAPAD, 0x00000000,
- MGA_DMAPAD, 0x00000000,
- MGA_DMAPAD, 0x00000000,
- MGA_DMAPAD, 0x00000000 );
-
- ADVANCE_DMA();
-
- tail = primary->tail + dev_priv->primary->offset;
-
- primary->tail = 0;
- primary->last_flush = 0;
- primary->last_wrap++;
-
- head = MGA_READ( MGA_PRIMADDRESS );
-
- if ( head == dev_priv->primary->offset ) {
- primary->space = primary->size;
- } else {
- primary->space = head - dev_priv->primary->offset;
- }
-
- DRM_DEBUG( " head = 0x%06lx\n",
- head - dev_priv->primary->offset );
- DRM_DEBUG( " tail = 0x%06x\n", primary->tail );
- DRM_DEBUG( " wrap = %d\n", primary->last_wrap );
- DRM_DEBUG( " space = 0x%06x\n", primary->space );
-
- mga_flush_write_combine();
- MGA_WRITE( MGA_PRIMEND, tail | MGA_PAGPXFER );
-
- set_bit( 0, &primary->wrapped );
- DRM_DEBUG( "%s: done.\n", __FUNCTION__ );
-}
-
-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__ );
-
- sarea_priv->last_wrap++;
- DRM_DEBUG( " wrap = %d\n", sarea_priv->last_wrap );
-
- mga_flush_write_combine();
- MGA_WRITE( MGA_PRIMADDRESS, head | MGA_DMA_GENERAL );
-
- clear_bit( 0, &primary->wrapped );
- DRM_DEBUG( "%s: done.\n", __FUNCTION__ );
-}
-
-
-/* ================================================================
- * Freelist management
- */
-
-#define MGA_BUFFER_USED ~0
-#define MGA_BUFFER_FREE 0
-
-#if MGA_FREELIST_DEBUG
-static void mga_freelist_print( drm_device_t *dev )
-{
- drm_mga_private_t *dev_priv = dev->dev_private;
- drm_mga_freelist_t *entry;
-
- DRM_INFO( "\n" );
- DRM_INFO( "current dispatch: last=0x%x done=0x%x\n",
- dev_priv->sarea_priv->last_dispatch,
- (unsigned int)(MGA_READ( MGA_PRIMADDRESS ) -
- dev_priv->primary->offset) );
- DRM_INFO( "current freelist:\n" );
-
- for ( entry = dev_priv->head->next ; entry ; entry = entry->next ) {
- DRM_INFO( " %p idx=%2d age=0x%x 0x%06lx\n",
- entry, entry->buf->idx, entry->age.head,
- entry->age.head - dev_priv->primary->offset );
- }
- DRM_INFO( "\n" );
-}
-#endif
-
-static int mga_freelist_init( drm_device_t *dev, drm_mga_private_t *dev_priv )
-{
- drm_device_dma_t *dma = dev->dma;
- drm_buf_t *buf;
- drm_mga_buf_priv_t *buf_priv;
- drm_mga_freelist_t *entry;
- int i;
- DRM_DEBUG( "%s: count=%d\n",
- __FUNCTION__, dma->buf_count );
-
- dev_priv->head = DRM(alloc)( sizeof(drm_mga_freelist_t),
- DRM_MEM_DRIVER );
- if ( dev_priv->head == NULL )
- return -ENOMEM;
-
- memset( dev_priv->head, 0, sizeof(drm_mga_freelist_t) );
- SET_AGE( &dev_priv->head->age, MGA_BUFFER_USED, 0 );
-
- for ( i = 0 ; i < dma->buf_count ; i++ ) {
- buf = dma->buflist[i];
- buf_priv = buf->dev_private;
-
- entry = DRM(alloc)( sizeof(drm_mga_freelist_t),
- DRM_MEM_DRIVER );
- if ( entry == NULL )
- return -ENOMEM;
-
- memset( entry, 0, sizeof(drm_mga_freelist_t) );
-
- entry->next = dev_priv->head->next;
- entry->prev = dev_priv->head;
- SET_AGE( &entry->age, MGA_BUFFER_FREE, 0 );
- entry->buf = buf;
-
- if ( dev_priv->head->next != NULL )
- dev_priv->head->next->prev = entry;
- if ( entry->next == NULL )
- dev_priv->tail = entry;
-
- buf_priv->list_entry = entry;
- buf_priv->discard = 0;
- buf_priv->dispatched = 0;
-
- dev_priv->head->next = entry;
- }
-
- return 0;
-}
-
-static void mga_freelist_cleanup( drm_device_t *dev )
-{
- drm_mga_private_t *dev_priv = dev->dev_private;
- drm_mga_freelist_t *entry;
- drm_mga_freelist_t *next;
- DRM_DEBUG( "%s\n", __FUNCTION__ );
-
- entry = dev_priv->head;
- while ( entry ) {
- next = entry->next;
- DRM(free)( entry, sizeof(drm_mga_freelist_t), DRM_MEM_DRIVER );
- entry = next;
- }
-
- dev_priv->head = dev_priv->tail = NULL;
-}
-
-#if 0
-/* FIXME: Still needed?
- */
-static void mga_freelist_reset( drm_device_t *dev )
-{
- drm_device_dma_t *dma = dev->dma;
- drm_buf_t *buf;
- drm_mga_buf_priv_t *buf_priv;
- int i;
-
- for ( i = 0 ; i < dma->buf_count ; i++ ) {
- buf = dma->buflist[i];
- buf_priv = buf->dev_private;
- SET_AGE( &buf_priv->list_entry->age,
- MGA_BUFFER_FREE, 0 );
- }
-}
-#endif
-
-static drm_buf_t *mga_freelist_get( drm_device_t *dev )
-{
- drm_mga_private_t *dev_priv = dev->dev_private;
- drm_mga_freelist_t *next;
- drm_mga_freelist_t *prev;
- drm_mga_freelist_t *tail = dev_priv->tail;
- u32 head, wrap;
- DRM_DEBUG( "%s:\n", __FUNCTION__ );
-
- head = MGA_READ( MGA_PRIMADDRESS );
- wrap = dev_priv->sarea_priv->last_wrap;
-
- DRM_DEBUG( " tail=0x%06lx %d\n",
- tail->age.head ?
- tail->age.head - dev_priv->primary->offset : 0,
- tail->age.wrap );
- DRM_DEBUG( " head=0x%06lx %d\n",
- head - dev_priv->primary->offset, wrap );
-
- if ( TEST_AGE( &tail->age, head, wrap ) ) {
- prev = dev_priv->tail->prev;
- next = dev_priv->tail;
- prev->next = NULL;
- next->prev = next->next = NULL;
- dev_priv->tail = prev;
- SET_AGE( &next->age, MGA_BUFFER_USED, 0 );
- return next->buf;
- }
-
- DRM_DEBUG( "returning NULL!\n" );
- return NULL;
-}
-
-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, *entry, *prev;
-
- DRM_DEBUG( "%s: age=0x%06lx wrap=%d\n",
- __FUNCTION__,
- buf_priv->list_entry->age.head -
- dev_priv->primary->offset,
- buf_priv->list_entry->age.wrap );
-
- entry = buf_priv->list_entry;
- head = dev_priv->head;
-
- if ( buf_priv->list_entry->age.head == MGA_BUFFER_USED ) {
- 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;
- }
-
- return 0;
-}
-
-
-/* ================================================================
- * DMA initialization, cleanup
- */
-
-static int mga_do_init_dma( drm_device_t *dev, drm_mga_init_t *init )
-{
- drm_mga_private_t *dev_priv;
- struct list_head *list;
- int ret;
- DRM_DEBUG( "%s\n", __FUNCTION__ );
-
- dev_priv = DRM(alloc)( sizeof(drm_mga_private_t), DRM_MEM_DRIVER );
- if ( !dev_priv )
- return -ENOMEM;
-
- memset( dev_priv, 0, sizeof(drm_mga_private_t) );
-
- dev_priv->chipset = init->chipset;
-
- dev_priv->usec_timeout = MGA_DEFAULT_USEC_TIMEOUT;
-
- if ( init->sgram ) {
- dev_priv->clear_cmd = MGA_DWGCTL_CLEAR | MGA_ATYPE_BLK;
- } else {
- dev_priv->clear_cmd = MGA_DWGCTL_CLEAR | MGA_ATYPE_RSTR;
- }
- dev_priv->maccess = init->maccess;
-
- dev_priv->fb_cpp = init->fb_cpp;
- 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_cpp = init->depth_cpp;
- dev_priv->depth_offset = init->depth_offset;
- dev_priv->depth_pitch = init->depth_pitch;
-
- /* FIXME: Need to support AGP textures...
- */
- dev_priv->texture_offset = init->texture_offset[0];
- dev_priv->texture_size = init->texture_size[0];
-
- list_for_each( list, &dev->maplist->head ) {
- drm_map_list_t *entry = (drm_map_list_t *)list;
- if ( entry->map &&
- entry->map->type == _DRM_SHM &&
- (entry->map->flags & _DRM_CONTAINS_LOCK) ) {
- dev_priv->sarea = entry->map;
- break;
- }
- }
- if(!dev_priv->sarea) {
- DRM_ERROR( "failed to find sarea!\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return -EINVAL;
- }
-
- DRM_FIND_MAP( dev_priv->fb, init->fb_offset );
- if(!dev_priv->fb) {
- DRM_ERROR( "failed to find framebuffer!\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return -EINVAL;
- }
- DRM_FIND_MAP( dev_priv->mmio, init->mmio_offset );
- if(!dev_priv->mmio) {
- DRM_ERROR( "failed to find mmio region!\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return -EINVAL;
- }
- DRM_FIND_MAP( dev_priv->status, init->status_offset );
- if(!dev_priv->status) {
- DRM_ERROR( "failed to find status page!\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return -EINVAL;
- }
-
- DRM_FIND_MAP( dev_priv->warp, init->warp_offset );
- if(!dev_priv->warp) {
- DRM_ERROR( "failed to find warp microcode region!\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return -EINVAL;
- }
- DRM_FIND_MAP( dev_priv->primary, init->primary_offset );
- if(!dev_priv->primary) {
- DRM_ERROR( "failed to find primary dma region!\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return -EINVAL;
- }
- DRM_FIND_MAP( dev_priv->buffers, init->buffers_offset );
- if(!dev_priv->buffers) {
- DRM_ERROR( "failed to find dma buffer region!\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return -EINVAL;
- }
-
- dev_priv->sarea_priv =
- (drm_mga_sarea_t *)((u8 *)dev_priv->sarea->handle +
- init->sarea_priv_offset);
-
- DRM_IOREMAP( dev_priv->warp );
- DRM_IOREMAP( dev_priv->primary );
- DRM_IOREMAP( dev_priv->buffers );
-
- if(!dev_priv->warp->handle ||
- !dev_priv->primary->handle ||
- !dev_priv->buffers->handle ) {
- DRM_ERROR( "failed to ioremap agp regions!\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return -ENOMEM;
- }
-
- ret = mga_warp_install_microcode( dev_priv );
- if ( ret < 0 ) {
- DRM_ERROR( "failed to install WARP ucode!\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return ret;
- }
-
- ret = mga_warp_init( dev_priv );
- if ( ret < 0 ) {
- DRM_ERROR( "failed to init WARP engine!\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return ret;
- }
-
- dev_priv->prim.status = (u32 *)dev_priv->status->handle;
-
- mga_do_wait_for_idle( dev_priv );
-
- /* Init the primary DMA registers.
- */
- MGA_WRITE( MGA_PRIMADDRESS,
- dev_priv->primary->offset | MGA_DMA_GENERAL );
-#if 0
- MGA_WRITE( MGA_PRIMPTR,
- virt_to_bus((void *)dev_priv->prim.status) |
- MGA_PRIMPTREN0 | /* Soft trap, SECEND, SETUPEND */
- MGA_PRIMPTREN1 ); /* DWGSYNC */
-#endif
-
- dev_priv->prim.start = (u8 *)dev_priv->primary->handle;
- dev_priv->prim.end = ((u8 *)dev_priv->primary->handle
- + dev_priv->primary->size);
- dev_priv->prim.size = dev_priv->primary->size;
-
- dev_priv->prim.tail = 0;
- dev_priv->prim.space = dev_priv->prim.size;
- dev_priv->prim.wrapped = 0;
-
- dev_priv->prim.last_flush = 0;
- dev_priv->prim.last_wrap = 0;
-
- dev_priv->prim.high_mark = 256 * DMA_BLOCK_SIZE;
-
- spin_lock_init( &dev_priv->prim.list_lock );
-
- dev_priv->prim.status[0] = dev_priv->primary->offset;
- dev_priv->prim.status[1] = 0;
-
- dev_priv->sarea_priv->last_wrap = 0;
- dev_priv->sarea_priv->last_frame.head = 0;
- dev_priv->sarea_priv->last_frame.wrap = 0;
-
- if ( mga_freelist_init( dev, dev_priv ) < 0 ) {
- DRM_ERROR( "could not initialize freelist\n" );
- /* Assign dev_private so we can do cleanup. */
- dev->dev_private = (void *)dev_priv;
- mga_do_cleanup_dma( dev );
- return -ENOMEM;
- }
-
- /* Make dev_private visable to others. */
- dev->dev_private = (void *)dev_priv;
- return 0;
-}
-
-int mga_do_cleanup_dma( drm_device_t *dev )
-{
- DRM_DEBUG( "%s\n", __FUNCTION__ );
-
- if ( dev->dev_private ) {
- drm_mga_private_t *dev_priv = dev->dev_private;
-
- DRM_IOREMAPFREE( dev_priv->warp );
- DRM_IOREMAPFREE( dev_priv->primary );
- DRM_IOREMAPFREE( dev_priv->buffers );
-
- if ( dev_priv->head != NULL ) {
- mga_freelist_cleanup( dev );
- }
-
- DRM(free)( dev->dev_private, sizeof(drm_mga_private_t),
- DRM_MEM_DRIVER );
- dev->dev_private = NULL;
- }
-
- return 0;
-}
-
-int mga_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_mga_init_t init;
-
- if ( copy_from_user( &init, (drm_mga_init_t *)arg, sizeof(init) ) )
- return -EFAULT;
-
- switch ( init.func ) {
- case MGA_INIT_DMA:
- return mga_do_init_dma( dev, &init );
- case MGA_CLEANUP_DMA:
- return mga_do_cleanup_dma( dev );
- }
-
- return -EINVAL;
-}
-
-
-/* ================================================================
- * Primary DMA stream management
- */
-
-int mga_dma_flush( 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_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private;
- drm_lock_t lock;
-
- LOCK_TEST_WITH_RETURN( dev );
-
- if ( copy_from_user( &lock, (drm_lock_t *)arg, sizeof(lock) ) )
- return -EFAULT;
-
- DRM_DEBUG( "%s: %s%s%s\n",
- __FUNCTION__,
- (lock.flags & _DRM_LOCK_FLUSH) ? "flush, " : "",
- (lock.flags & _DRM_LOCK_FLUSH_ALL) ? "flush all, " : "",
- (lock.flags & _DRM_LOCK_QUIESCENT) ? "idle, " : "" );
-
- WRAP_WAIT_WITH_RETURN( dev_priv );
-
- if ( lock.flags & (_DRM_LOCK_FLUSH | _DRM_LOCK_FLUSH_ALL) ) {
- mga_do_dma_flush( dev_priv );
- }
-
- if ( lock.flags & _DRM_LOCK_QUIESCENT ) {
-#if MGA_DMA_DEBUG
- int ret = mga_do_wait_for_idle( dev_priv );
- if ( ret < 0 )
- DRM_INFO( __FUNCTION__": -EBUSY\n" );
- return ret;
-#else
- return mga_do_wait_for_idle( dev_priv );
-#endif
- } else {
- return 0;
- }
-}
-
-int mga_dma_reset( 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_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private;
-
- LOCK_TEST_WITH_RETURN( dev );
-
- return mga_do_dma_reset( dev_priv );
-}
-
-
-/* ================================================================
- * DMA buffer management
- */
-
-static int mga_dma_get_buffers( drm_device_t *dev, drm_dma_t *d )
-{
- drm_buf_t *buf;
- int i;
-
- for ( i = d->granted_count ; i < d->request_count ; i++ ) {
- buf = mga_freelist_get( dev );
- if ( !buf ) return -EAGAIN;
-
- buf->pid = current->pid;
-
- if ( copy_to_user( &d->request_indices[i],
- &buf->idx, sizeof(buf->idx) ) )
- return -EFAULT;
- if ( copy_to_user( &d->request_sizes[i],
- &buf->total, sizeof(buf->total) ) )
- return -EFAULT;
-
- d->granted_count++;
- }
- return 0;
-}
-
-int mga_dma_buffers( 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_device_dma_t *dma = dev->dma;
- drm_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private;
- drm_dma_t d;
- int ret = 0;
-
- LOCK_TEST_WITH_RETURN( dev );
-
- if ( copy_from_user( &d, (drm_dma_t *)arg, sizeof(d) ) )
- return -EFAULT;
-
- /* Please don't send us buffers.
- */
- if ( d.send_count != 0 ) {
- DRM_ERROR( "Process %d trying to send %d buffers via drmDMA\n",
- current->pid, d.send_count );
- return -EINVAL;
- }
-
- /* We'll send you buffers.
- */
- if ( d.request_count < 0 || d.request_count > dma->buf_count ) {
- DRM_ERROR( "Process %d trying to get %d buffers (of %d max)\n",
- current->pid, d.request_count, dma->buf_count );
- return -EINVAL;
- }
-
- WRAP_TEST_WITH_RETURN( dev_priv );
-
- d.granted_count = 0;
-
- if ( d.request_count ) {
- ret = mga_dma_get_buffers( dev, &d );
- }
-
- if ( copy_to_user( (drm_dma_t *)arg, &d, sizeof(d) ) )
- return -EFAULT;
-
- return ret;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 20:25:02 +0000