summaryrefslogtreecommitdiff
path: root/bsd-core/drm_bufs.c
diff options
context:
space:
mode:
Diffstat (limited to 'bsd-core/drm_bufs.c')
-rw-r--r--bsd-core/drm_bufs.c1092
1 files changed, 1092 insertions, 0 deletions
diff --git a/bsd-core/drm_bufs.c b/bsd-core/drm_bufs.c
new file mode 100644
index 00000000..d55b36d8
--- /dev/null
+++ b/bsd-core/drm_bufs.c
@@ -0,0 +1,1092 @@
+/* drm_bufs.h -- Generic buffer template -*- linux-c -*-
+ * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
+ *
+ * Copyright 1999, 2000 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
+ * VA LINUX SYSTEMS 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>
+ * Gareth Hughes <gareth@valinux.com>
+ */
+
+#define __NO_VERSION__
+#include <machine/param.h>
+#include <sys/mman.h>
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_map.h>
+#include <vm/vm_param.h>
+#include "drmP.h"
+
+#ifndef __HAVE_PCI_DMA
+#define __HAVE_PCI_DMA 0
+#endif
+
+#ifndef __HAVE_SG
+#define __HAVE_SG 0
+#endif
+
+#ifndef DRIVER_BUF_PRIV_T
+#define DRIVER_BUF_PRIV_T u32
+#endif
+#ifndef DRIVER_AGP_BUFFERS_MAP
+#if __HAVE_AGP && __HAVE_DMA
+#error "You must define DRIVER_AGP_BUFFERS_MAP()"
+#else
+#define DRIVER_AGP_BUFFERS_MAP( dev ) NULL
+#endif
+#endif
+
+/*
+ * Compute order. Can be made faster.
+ */
+int DRM(order)( unsigned long size )
+{
+ int order;
+ unsigned long tmp;
+
+ for ( order = 0, tmp = size ; tmp >>= 1 ; ++order );
+
+ if ( size & ~(1 << order) )
+ ++order;
+
+ return order;
+}
+
+int DRM(addmap)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_map_t *map;
+ drm_map_list_entry_t *list;
+
+ if (!(dev->flags & (FREAD|FWRITE)))
+ DRM_OS_RETURN(EACCES); /* Require read/write */
+
+ map = (drm_map_t *) DRM(alloc)( sizeof(*map), DRM_MEM_MAPS );
+ if ( !map )
+ DRM_OS_RETURN(ENOMEM);
+
+ *map = *(drm_map_t *)data;
+
+ /* Only allow shared memory to be removable since we only keep enough
+ * book keeping information about shared memory to allow for removal
+ * when processes fork.
+ */
+ if ( (map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM ) {
+ DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
+ DRM_OS_RETURN(EINVAL);
+ }
+ DRM_DEBUG( "offset = 0x%08lx, size = 0x%08lx, type = %d\n",
+ map->offset, map->size, map->type );
+ if ( (map->offset & PAGE_MASK) || (map->size & PAGE_MASK) ) {
+ DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
+ DRM_OS_RETURN(EINVAL);
+ }
+ map->mtrr = -1;
+ map->handle = 0;
+
+ TAILQ_FOREACH(list, dev->maplist, link) {
+ drm_map_t *entry = list->map;
+ if ( (entry->offset >= map->offset
+ && (entry->offset) < (map->offset + map->size) )
+ || ((entry->offset + entry->size) >= map->offset
+ && (entry->offset + entry->size) < (map->offset + map->size) )
+ || ((entry->offset < map->offset)
+ && (entry->offset + entry->size) >= (map->offset + map->size) ) )
+ DRM_DEBUG("map collission: add(0x%lx-0x%lx), current(0x%lx-0x%lx)\n",
+ entry->offset, entry->offset + entry->size - 1,
+ map->offset, map->offset + map->size - 1);
+ }
+
+ switch ( map->type ) {
+ case _DRM_REGISTERS:
+ case _DRM_FRAME_BUFFER:
+#if !defined(__sparc__) && !defined(__alpha__)
+ if ( map->offset + map->size < map->offset
+ ) {
+ DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
+ DRM_OS_RETURN(EINVAL);
+ }
+#endif
+#ifdef __alpha__
+ map->offset += dev->hose->mem_space->start;
+#endif
+#if __REALLY_HAVE_MTRR
+ if ( map->type == _DRM_FRAME_BUFFER ||
+ (map->flags & _DRM_WRITE_COMBINING) ) {
+ map->mtrr = mtrr_add( map->offset, map->size,
+ MTRR_TYPE_WRCOMB, 1 );
+ }
+#endif
+ map->handle = DRM(ioremap)( map->offset, map->size );
+ break;
+
+ case _DRM_SHM:
+ DRM_INFO( "%ld %d %d\n",
+ map->size, DRM(order)( map->size ), PAGE_SHIFT);
+ map->handle = (void *)DRM(alloc_pages)
+ (DRM(order)(map->size) - PAGE_SHIFT, DRM_MEM_SAREA);
+ DRM_DEBUG( "%ld %d %p\n",
+ map->size, DRM(order)( map->size ), map->handle );
+ if ( !map->handle ) {
+ DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
+ DRM_OS_RETURN(ENOMEM);
+ }
+ map->offset = (unsigned long)map->handle;
+ if ( map->flags & _DRM_CONTAINS_LOCK ) {
+ dev->lock.hw_lock = map->handle; /* Pointer to lock */
+ }
+ break;
+#if __REALLY_HAVE_AGP
+ case _DRM_AGP:
+#ifdef __alpha__
+ map->offset += dev->hose->mem_space->start;
+#endif
+ map->offset += dev->agp->base;
+ map->mtrr = dev->agp->agp_mtrr; /* for getmap */
+ break;
+#endif
+ case _DRM_SCATTER_GATHER:
+ if (!dev->sg) {
+ DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
+ DRM_OS_RETURN(EINVAL);
+ }
+ map->offset = map->offset + dev->sg->handle;
+ break;
+
+ default:
+ DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
+ DRM_OS_RETURN(EINVAL);
+ }
+
+ list = DRM(alloc)(sizeof(*list), DRM_MEM_MAPS);
+ if(!list) {
+ DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
+ DRM_OS_RETURN(EINVAL);
+ }
+ memset(list, 0, sizeof(*list));
+ list->map = map;
+
+ DRM_OS_LOCK;
+ TAILQ_INSERT_TAIL(dev->maplist, list, link);
+ DRM_OS_UNLOCK;
+
+ *(drm_map_t *)data = *map;
+
+ if ( map->type != _DRM_SHM ) {
+ ((drm_map_t *)data)->handle = (void *)map->offset;
+ }
+ return 0;
+}
+
+
+/* Remove a map private from list and deallocate resources if the mapping
+ * isn't in use.
+ */
+
+int DRM(rmmap)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_map_list_entry_t *list;
+ drm_map_t *map;
+ drm_map_t request;
+ int found_maps = 0;
+
+ DRM_OS_KRNFROMUSR( request, (drm_map_t *)data, sizeof(request) );
+
+ DRM_OS_LOCK;
+ TAILQ_FOREACH(list, dev->maplist, link) {
+ map = list->map;
+ if(map->handle == request.handle &&
+ map->flags & _DRM_REMOVABLE) break;
+ }
+
+ /* List has wrapped around to the head pointer, or its empty we didn't
+ * find anything.
+ */
+ if(list == NULL) {
+ DRM_OS_UNLOCK;
+ DRM_OS_RETURN(EINVAL);
+ }
+ TAILQ_REMOVE(dev->maplist, list, link);
+ DRM(free)(list, sizeof(*list), DRM_MEM_MAPS);
+
+
+ if(!found_maps) {
+ switch (map->type) {
+ case _DRM_REGISTERS:
+ case _DRM_FRAME_BUFFER:
+#if __REALLY_HAVE_MTRR
+ if (map->mtrr >= 0) {
+ int retcode;
+ retcode = mtrr_del(map->mtrr,
+ map->offset,
+ map->size);
+ DRM_DEBUG("mtrr_del = %d\n", retcode);
+ }
+#endif
+ DRM(ioremapfree)(map->handle, map->size);
+ break;
+ case _DRM_SHM:
+ DRM(free_pages)( (unsigned long)map->handle, DRM(order)(map->size), DRM_MEM_SAREA );
+ break;
+ case _DRM_AGP:
+ case _DRM_SCATTER_GATHER:
+ break;
+ }
+ DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
+ }
+ DRM_OS_UNLOCK;
+ return 0;
+}
+
+#if __HAVE_DMA
+
+
+static void DRM(cleanup_buf_error)(drm_buf_entry_t *entry)
+{
+ int i;
+
+ if (entry->seg_count) {
+ for (i = 0; i < entry->seg_count; i++) {
+ DRM(free_pages)(entry->seglist[i],
+ entry->page_order,
+ DRM_MEM_DMA);
+ }
+ DRM(free)(entry->seglist,
+ entry->seg_count *
+ sizeof(*entry->seglist),
+ DRM_MEM_SEGS);
+
+ entry->seg_count = 0;
+ }
+
+ if(entry->buf_count) {
+ for(i = 0; i < entry->buf_count; i++) {
+ if(entry->buflist[i].dev_private) {
+ DRM(free)(entry->buflist[i].dev_private,
+ entry->buflist[i].dev_priv_size,
+ DRM_MEM_BUFS);
+ }
+ }
+ DRM(free)(entry->buflist,
+ entry->buf_count *
+ sizeof(*entry->buflist),
+ DRM_MEM_BUFS);
+
+#if __HAVE_DMA_FREELIST
+ DRM(freelist_destroy)(&entry->freelist);
+#endif
+
+ entry->buf_count = 0;
+ }
+}
+
+#if __REALLY_HAVE_AGP
+int DRM(addbufs_agp)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_device_dma_t *dma = dev->dma;
+ drm_buf_desc_t request;
+ drm_buf_entry_t *entry;
+ drm_buf_t *buf;
+ unsigned long offset;
+ unsigned long agp_offset;
+ int count;
+ int order;
+ int size;
+ int alignment;
+ int page_order;
+ int total;
+ int byte_count;
+ int i;
+ drm_buf_t **temp_buflist;
+
+ if ( !dma ) DRM_OS_RETURN(EINVAL);
+
+ DRM_OS_KRNFROMUSR( request, (drm_buf_desc_t *)data, sizeof(request) );
+
+ count = request.count;
+ order = DRM(order)( request.size );
+ size = 1 << order;
+
+ alignment = (request.flags & _DRM_PAGE_ALIGN)
+ ? round_page(size) : size;
+ page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
+ total = PAGE_SIZE << page_order;
+
+ byte_count = 0;
+ agp_offset = dev->agp->base + request.agp_start;
+
+ DRM_DEBUG( "count: %d\n", count );
+ DRM_DEBUG( "order: %d\n", order );
+ DRM_DEBUG( "size: %d\n", size );
+ DRM_DEBUG( "agp_offset: 0x%lx\n", agp_offset );
+ DRM_DEBUG( "alignment: %d\n", alignment );
+ DRM_DEBUG( "page_order: %d\n", page_order );
+ DRM_DEBUG( "total: %d\n", total );
+
+ if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER )
+ DRM_OS_RETURN(EINVAL);
+ if ( dev->queue_count )
+ DRM_OS_RETURN(EBUSY); /* Not while in use */
+
+ DRM_OS_SPINLOCK( &dev->count_lock );
+ if ( dev->buf_use ) {
+ DRM_OS_SPINUNLOCK( &dev->count_lock );
+ DRM_OS_RETURN(EBUSY);
+ }
+ atomic_inc( &dev->buf_alloc );
+ DRM_OS_SPINUNLOCK( &dev->count_lock );
+
+ DRM_OS_LOCK;
+ entry = &dma->bufs[order];
+ if ( entry->buf_count ) {
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM); /* May only call once for each order */
+ }
+
+ if (count < 0 || count > 4096) {
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(EINVAL);
+ }
+
+ entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist),
+ DRM_MEM_BUFS );
+ if ( !entry->buflist ) {
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM);
+ }
+ memset( entry->buflist, 0, count * sizeof(*entry->buflist) );
+
+ entry->buf_size = size;
+ entry->page_order = page_order;
+
+ offset = 0;
+
+ while ( entry->buf_count < count ) {
+ buf = &entry->buflist[entry->buf_count];
+ buf->idx = dma->buf_count + entry->buf_count;
+ buf->total = alignment;
+ buf->order = order;
+ buf->used = 0;
+
+ buf->offset = (dma->byte_count + offset);
+ buf->bus_address = agp_offset + offset;
+ buf->address = (void *)(agp_offset + offset);
+ buf->next = NULL;
+ buf->waiting = 0;
+ buf->pending = 0;
+ buf->dma_wait = 0;
+ buf->pid = 0;
+
+ buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
+ buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T),
+ DRM_MEM_BUFS );
+ if(!buf->dev_private) {
+ /* Set count correctly so we free the proper amount. */
+ entry->buf_count = count;
+ DRM(cleanup_buf_error)(entry);
+ }
+ memset( buf->dev_private, 0, buf->dev_priv_size );
+
+#if __HAVE_DMA_HISTOGRAM
+ buf->time_queued = 0;
+ buf->time_dispatched = 0;
+ buf->time_completed = 0;
+ buf->time_freed = 0;
+#endif
+
+ offset += alignment;
+ entry->buf_count++;
+ byte_count += PAGE_SIZE << page_order;
+ }
+
+ DRM_DEBUG( "byte_count: %d\n", byte_count );
+
+ temp_buflist = DRM(realloc)( dma->buflist,
+ dma->buf_count * sizeof(*dma->buflist),
+ (dma->buf_count + entry->buf_count)
+ * sizeof(*dma->buflist),
+ DRM_MEM_BUFS );
+ if(!temp_buflist) {
+ /* Free the entry because it isn't valid */
+ DRM(cleanup_buf_error)(entry);
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM);
+ }
+ dma->buflist = temp_buflist;
+
+ for ( i = 0 ; i < entry->buf_count ; i++ ) {
+ dma->buflist[i + dma->buf_count] = &entry->buflist[i];
+ }
+
+ dma->buf_count += entry->buf_count;
+ dma->byte_count += byte_count;
+
+ DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count );
+ DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count );
+
+#if __HAVE_DMA_FREELIST
+ DRM(freelist_create)( &entry->freelist, entry->buf_count );
+ for ( i = 0 ; i < entry->buf_count ; i++ ) {
+ DRM(freelist_put)( dev, &entry->freelist, &entry->buflist[i] );
+ }
+#endif
+ DRM_OS_UNLOCK;
+
+ request.count = entry->buf_count;
+ request.size = size;
+
+ DRM_OS_KRNTOUSR( (drm_buf_desc_t *)data, request, sizeof(request) );
+
+ dma->flags = _DRM_DMA_USE_AGP;
+
+ atomic_dec( &dev->buf_alloc );
+ return 0;
+}
+#endif /* __REALLY_HAVE_AGP */
+
+#if __HAVE_PCI_DMA
+int DRM(addbufs_pci)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_device_dma_t *dma = dev->dma;
+ drm_buf_desc_t request;
+ int count;
+ int order;
+ int size;
+ int total;
+ int page_order;
+ drm_buf_entry_t *entry;
+ unsigned long page;
+ drm_buf_t *buf;
+ int alignment;
+ unsigned long offset;
+ int i;
+ int byte_count;
+ int page_count;
+ unsigned long *temp_pagelist;
+ drm_buf_t **temp_buflist;
+
+ if ( !dma ) DRM_OS_RETURN(EINVAL);
+
+ DRM_OS_KRNFROMUSR( request, (drm_buf_desc_t *)data, sizeof(request) );
+
+ count = request.count;
+ order = DRM(order)( request.size );
+ size = 1 << order;
+
+ DRM_DEBUG( "count=%d, size=%d (%d), order=%d, queue_count=%d\n",
+ request.count, request.size, size,
+ order, dev->queue_count );
+
+ if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER )
+ DRM_OS_RETURN(EINVAL);
+ if ( dev->queue_count )
+ DRM_OS_RETURN(EBUSY); /* Not while in use */
+
+ alignment = (request.flags & _DRM_PAGE_ALIGN)
+ ? round_page(size) : size;
+ page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
+ total = PAGE_SIZE << page_order;
+
+ DRM_OS_SPINLOCK( &dev->count_lock );
+ if ( dev->buf_use ) {
+ DRM_OS_SPINUNLOCK( &dev->count_lock );
+ DRM_OS_RETURN(EBUSY);
+ }
+ atomic_inc( &dev->buf_alloc );
+ DRM_OS_SPINUNLOCK( &dev->count_lock );
+
+ DRM_OS_LOCK;
+ entry = &dma->bufs[order];
+ if ( entry->buf_count ) {
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM); /* May only call once for each order */
+ }
+
+ if (count < 0 || count > 4096) {
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(EINVAL);
+ }
+
+ entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist),
+ DRM_MEM_BUFS );
+ if ( !entry->buflist ) {
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM);
+ }
+ memset( entry->buflist, 0, count * sizeof(*entry->buflist) );
+
+ entry->seglist = DRM(alloc)( count * sizeof(*entry->seglist),
+ DRM_MEM_SEGS );
+ if ( !entry->seglist ) {
+ DRM(free)( entry->buflist,
+ count * sizeof(*entry->buflist),
+ DRM_MEM_BUFS );
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM);
+ }
+ memset( entry->seglist, 0, count * sizeof(*entry->seglist) );
+
+ temp_pagelist = DRM(realloc)( dma->pagelist,
+ dma->page_count * sizeof(*dma->pagelist),
+ (dma->page_count + (count << page_order))
+ * sizeof(*dma->pagelist),
+ DRM_MEM_PAGES );
+ if(!temp_pagelist) {
+ DRM(free)( entry->buflist,
+ count * sizeof(*entry->buflist),
+ DRM_MEM_BUFS );
+ DRM(free)( entry->seglist,
+ count * sizeof(*entry->seglist),
+ DRM_MEM_SEGS );
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM);
+ }
+
+ dma->pagelist = temp_pagelist;
+ DRM_DEBUG( "pagelist: %d entries\n",
+ dma->page_count + (count << page_order) );
+
+ entry->buf_size = size;
+ entry->page_order = page_order;
+ byte_count = 0;
+ page_count = 0;
+
+ while ( entry->buf_count < count ) {
+ page = DRM(alloc_pages)( page_order, DRM_MEM_DMA );
+ if ( !page ) break;
+ entry->seglist[entry->seg_count++] = page;
+ for ( i = 0 ; i < (1 << page_order) ; i++ ) {
+ DRM_DEBUG( "page %d @ 0x%08lx\n",
+ dma->page_count + page_count,
+ page + PAGE_SIZE * i );
+ dma->pagelist[dma->page_count + page_count++]
+ = page + PAGE_SIZE * i;
+ }
+ for ( offset = 0 ;
+ offset + size <= total && entry->buf_count < count ;
+ offset += alignment, ++entry->buf_count ) {
+ buf = &entry->buflist[entry->buf_count];
+ buf->idx = dma->buf_count + entry->buf_count;
+ buf->total = alignment;
+ buf->order = order;
+ buf->used = 0;
+ buf->offset = (dma->byte_count + byte_count + offset);
+ buf->address = (void *)(page + offset);
+ buf->next = NULL;
+ buf->waiting = 0;
+ buf->pending = 0;
+ buf->dma_wait = 0;
+ buf->pid = 0;
+#if __HAVE_DMA_HISTOGRAM
+ buf->time_queued = 0;
+ buf->time_dispatched = 0;
+ buf->time_completed = 0;
+ buf->time_freed = 0;
+#endif
+ DRM_DEBUG( "buffer %d @ %p\n",
+ entry->buf_count, buf->address );
+ }
+ byte_count += PAGE_SIZE << page_order;
+ }
+
+ temp_buflist = DRM(realloc)( dma->buflist,
+ dma->buf_count * sizeof(*dma->buflist),
+ (dma->buf_count + entry->buf_count)
+ * sizeof(*dma->buflist),
+ DRM_MEM_BUFS );
+ if(!temp_buflist) {
+ /* Free the entry because it isn't valid */
+ DRM(cleanup_buf_error)(entry);
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM);
+ }
+ dma->buflist = temp_buflist;
+
+ for ( i = 0 ; i < entry->buf_count ; i++ ) {
+ dma->buflist[i + dma->buf_count] = &entry->buflist[i];
+ }
+
+ dma->buf_count += entry->buf_count;
+ dma->seg_count += entry->seg_count;
+ dma->page_count += entry->seg_count << page_order;
+ dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
+
+#if __HAVE_DMA_FREELIST
+ DRM(freelist_create)( &entry->freelist, entry->buf_count );
+ for ( i = 0 ; i < entry->buf_count ; i++ ) {
+ DRM(freelist_put)( dev, &entry->freelist, &entry->buflist[i] );
+ }
+#endif
+ DRM_OS_UNLOCK;
+
+ request.count = entry->buf_count;
+ request.size = size;
+
+ DRM_OS_KRNTOUSR( (drm_buf_desc_t *)data, request, sizeof(request) );
+
+ atomic_dec( &dev->buf_alloc );
+ return 0;
+
+}
+#endif /* __HAVE_PCI_DMA */
+
+#if __REALLY_HAVE_SG
+int DRM(addbufs_sg)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_device_dma_t *dma = dev->dma;
+ drm_buf_desc_t request;
+ drm_buf_entry_t *entry;
+ drm_buf_t *buf;
+ unsigned long offset;
+ unsigned long agp_offset;
+ int count;
+ int order;
+ int size;
+ int alignment;
+ int page_order;
+ int total;
+ int byte_count;
+ int i;
+ drm_buf_t **temp_buflist;
+
+ if ( !dma ) DRM_OS_RETURN(EINVAL);
+
+ DRM_OS_KRNFROMUSR( request, (drm_buf_desc_t *)data, sizeof(request) );
+
+ count = request.count;
+ order = DRM(order)( request.size );
+ size = 1 << order;
+
+ alignment = (request.flags & _DRM_PAGE_ALIGN)
+ ? round_page(size) : size;
+ page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
+ total = PAGE_SIZE << page_order;
+
+ byte_count = 0;
+ agp_offset = request.agp_start;
+
+ DRM_DEBUG( "count: %d\n", count );
+ DRM_DEBUG( "order: %d\n", order );
+ DRM_DEBUG( "size: %d\n", size );
+ DRM_DEBUG( "agp_offset: %ld\n", agp_offset );
+ DRM_DEBUG( "alignment: %d\n", alignment );
+ DRM_DEBUG( "page_order: %d\n", page_order );
+ DRM_DEBUG( "total: %d\n", total );
+
+ if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER )
+ DRM_OS_RETURN(EINVAL);
+ if ( dev->queue_count ) DRM_OS_RETURN(EBUSY); /* Not while in use */
+
+ DRM_OS_SPINLOCK( &dev->count_lock );
+ if ( dev->buf_use ) {
+ DRM_OS_SPINUNLOCK( &dev->count_lock );
+ DRM_OS_RETURN(EBUSY);
+ }
+ atomic_inc( &dev->buf_alloc );
+ DRM_OS_SPINUNLOCK( &dev->count_lock );
+
+ DRM_OS_LOCK;
+ entry = &dma->bufs[order];
+ if ( entry->buf_count ) {
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM); /* May only call once for each order */
+ }
+
+ if (count < 0 || count > 4096) {
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(EINVAL);
+ }
+
+ entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist),
+ DRM_MEM_BUFS );
+ if ( !entry->buflist ) {
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM);
+ }
+ memset( entry->buflist, 0, count * sizeof(*entry->buflist) );
+
+ entry->buf_size = size;
+ entry->page_order = page_order;
+
+ offset = 0;
+
+ while ( entry->buf_count < count ) {
+ buf = &entry->buflist[entry->buf_count];
+ buf->idx = dma->buf_count + entry->buf_count;
+ buf->total = alignment;
+ buf->order = order;
+ buf->used = 0;
+
+ buf->offset = (dma->byte_count + offset);
+ buf->bus_address = agp_offset + offset;
+ buf->address = (void *)(agp_offset + offset + dev->sg->handle);
+ buf->next = NULL;
+ buf->waiting = 0;
+ buf->pending = 0;
+ buf->dma_wait = 0;
+ buf->pid = 0;
+
+ buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
+ buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T),
+ DRM_MEM_BUFS );
+ if(!buf->dev_private) {
+ /* Set count correctly so we free the proper amount. */
+ entry->buf_count = count;
+ DRM(cleanup_buf_error)(entry);
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM);
+ }
+
+ memset( buf->dev_private, 0, buf->dev_priv_size );
+
+# if __HAVE_DMA_HISTOGRAM
+ buf->time_queued = 0;
+ buf->time_dispatched = 0;
+ buf->time_completed = 0;
+ buf->time_freed = 0;
+# endif
+ DRM_DEBUG( "buffer %d @ %p\n",
+ entry->buf_count, buf->address );
+
+ offset += alignment;
+ entry->buf_count++;
+ byte_count += PAGE_SIZE << page_order;
+ }
+
+ DRM_DEBUG( "byte_count: %d\n", byte_count );
+
+ temp_buflist = DRM(realloc)( dma->buflist,
+ dma->buf_count * sizeof(*dma->buflist),
+ (dma->buf_count + entry->buf_count)
+ * sizeof(*dma->buflist),
+ DRM_MEM_BUFS );
+ if(!temp_buflist) {
+ /* Free the entry because it isn't valid */
+ DRM(cleanup_buf_error)(entry);
+ DRM_OS_UNLOCK;
+ atomic_dec( &dev->buf_alloc );
+ DRM_OS_RETURN(ENOMEM);
+ }
+ dma->buflist = temp_buflist;
+
+ for ( i = 0 ; i < entry->buf_count ; i++ ) {
+ dma->buflist[i + dma->buf_count] = &entry->buflist[i];
+ }
+
+ dma->buf_count += entry->buf_count;
+ dma->byte_count += byte_count;
+
+ DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count );
+ DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count );
+
+#if __HAVE_DMA_FREELIST
+ DRM(freelist_create)( &entry->freelist, entry->buf_count );
+ for ( i = 0 ; i < entry->buf_count ; i++ ) {
+ DRM(freelist_put)( dev, &entry->freelist, &entry->buflist[i] );
+ }
+#endif
+ DRM_OS_UNLOCK;
+
+ request.count = entry->buf_count;
+ request.size = size;
+
+ DRM_OS_KRNTOUSR( (drm_buf_desc_t *)data, request, sizeof(request) );
+
+ dma->flags = _DRM_DMA_USE_SG;
+
+ atomic_dec( &dev->buf_alloc );
+ return 0;
+}
+#endif /* __REALLY_HAVE_SG */
+
+int DRM(addbufs)( DRM_OS_IOCTL )
+{
+ drm_buf_desc_t request;
+
+ DRM_OS_KRNFROMUSR( request, (drm_buf_desc_t *)data, sizeof(request) );
+
+#if __REALLY_HAVE_AGP
+ if ( request.flags & _DRM_AGP_BUFFER )
+ return DRM(addbufs_agp)( kdev, cmd, data, flags, p );
+ else
+#endif
+#if __REALLY_HAVE_SG
+ if ( request.flags & _DRM_SG_BUFFER )
+ return DRM(addbufs_sg)( kdev, cmd, data, flags, p );
+ else
+#endif
+#if __HAVE_PCI_DMA
+ return DRM(addbufs_pci)( kdev, cmd, data, flags, p );
+#else
+ DRM_OS_RETURN(EINVAL);
+#endif
+}
+
+int DRM(infobufs)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_device_dma_t *dma = dev->dma;
+ drm_buf_info_t request;
+ int i;
+ int count;
+
+ if ( !dma ) DRM_OS_RETURN(EINVAL);
+
+ DRM_OS_SPINLOCK( &dev->count_lock );
+ if ( atomic_read( &dev->buf_alloc ) ) {
+ DRM_OS_SPINUNLOCK( &dev->count_lock );
+ DRM_OS_RETURN(EBUSY);
+ }
+ ++dev->buf_use; /* Can't allocate more after this call */
+ DRM_OS_SPINUNLOCK( &dev->count_lock );
+
+ DRM_OS_KRNFROMUSR( request, (drm_buf_info_t *)data, sizeof(request) );
+
+ for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) {
+ if ( dma->bufs[i].buf_count ) ++count;
+ }
+
+ DRM_DEBUG( "count = %d\n", count );
+
+ if ( request.count >= count ) {
+ for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) {
+ if ( dma->bufs[i].buf_count ) {
+ drm_buf_desc_t *to = &request.list[count];
+ drm_buf_entry_t *from = &dma->bufs[i];
+ drm_freelist_t *list = &dma->bufs[i].freelist;
+ if ( DRM_OS_COPYTOUSR( &to->count,
+ &from->buf_count,
+ sizeof(from->buf_count) ) ||
+ DRM_OS_COPYTOUSR( &to->size,
+ &from->buf_size,
+ sizeof(from->buf_size) ) ||
+ DRM_OS_COPYTOUSR( &to->low_mark,
+ &list->low_mark,
+ sizeof(list->low_mark) ) ||
+ DRM_OS_COPYTOUSR( &to->high_mark,
+ &list->high_mark,
+ sizeof(list->high_mark) ) )
+ DRM_OS_RETURN(EFAULT);
+
+ DRM_DEBUG( "%d %d %d %d %d\n",
+ i,
+ dma->bufs[i].buf_count,
+ dma->bufs[i].buf_size,
+ dma->bufs[i].freelist.low_mark,
+ dma->bufs[i].freelist.high_mark );
+ ++count;
+ }
+ }
+ }
+ request.count = count;
+
+ DRM_OS_KRNTOUSR( (drm_buf_info_t *)data, request, sizeof(request) );
+
+ return 0;
+}
+
+int DRM(markbufs)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_device_dma_t *dma = dev->dma;
+ drm_buf_desc_t request;
+ int order;
+ drm_buf_entry_t *entry;
+
+ if ( !dma ) DRM_OS_RETURN(EINVAL);
+
+ DRM_OS_KRNFROMUSR( request, (drm_buf_desc_t *)data, sizeof(request) );
+
+ DRM_DEBUG( "%d, %d, %d\n",
+ request.size, request.low_mark, request.high_mark );
+ order = DRM(order)( request.size );
+ if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER )
+ DRM_OS_RETURN(EINVAL);
+ entry = &dma->bufs[order];
+
+ if ( request.low_mark < 0 || request.low_mark > entry->buf_count )
+ DRM_OS_RETURN(EINVAL);
+ if ( request.high_mark < 0 || request.high_mark > entry->buf_count )
+ DRM_OS_RETURN(EINVAL);
+
+ entry->freelist.low_mark = request.low_mark;
+ entry->freelist.high_mark = request.high_mark;
+
+ return 0;
+}
+
+int DRM(freebufs)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_device_dma_t *dma = dev->dma;
+ drm_buf_free_t request;
+ int i;
+ int idx;
+ drm_buf_t *buf;
+
+ if ( !dma ) DRM_OS_RETURN(EINVAL);
+
+ DRM_OS_KRNFROMUSR( request, (drm_buf_free_t *)data, sizeof(request) );
+
+ DRM_DEBUG( "%d\n", request.count );
+ for ( i = 0 ; i < request.count ; i++ ) {
+ if ( DRM_OS_COPYFROMUSR( &idx,
+ &request.list[i],
+ sizeof(idx) ) )
+ DRM_OS_RETURN(EFAULT);
+ if ( idx < 0 || idx >= dma->buf_count ) {
+ DRM_ERROR( "Index %d (of %d max)\n",
+ idx, dma->buf_count - 1 );
+ DRM_OS_RETURN(EINVAL);
+ }
+ buf = dma->buflist[idx];
+ if ( buf->pid != DRM_OS_CURRENTPID ) {
+ DRM_ERROR( "Process %d freeing buffer owned by %d\n",
+ DRM_OS_CURRENTPID, buf->pid );
+ DRM_OS_RETURN(EINVAL);
+ }
+ DRM(free_buffer)( dev, buf );
+ }
+
+ return 0;
+}
+
+int DRM(mapbufs)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_device_dma_t *dma = dev->dma;
+ int retcode = 0;
+ const int zero = 0;
+ vm_offset_t virtual, address;
+#if __FreeBSD_version >= 500000
+ struct vmspace *vms = p->td_proc->p_vmspace;
+#else
+ struct vmspace *vms = p->p_vmspace;
+#endif
+ drm_buf_map_t request;
+ int i;
+
+ if ( !dma ) DRM_OS_RETURN(EINVAL);
+
+ DRM_OS_SPINLOCK( &dev->count_lock );
+ if ( atomic_read( &dev->buf_alloc ) ) {
+ DRM_OS_SPINUNLOCK( &dev->count_lock );
+ DRM_OS_RETURN(EBUSY);
+ }
+ dev->buf_use++; /* Can't allocate more after this call */
+ DRM_OS_SPINUNLOCK( &dev->count_lock );
+
+ DRM_OS_KRNFROMUSR( request, (drm_buf_map_t *)data, sizeof(request) );
+
+ if ( request.count >= dma->buf_count ) {
+ if ( (__HAVE_AGP && (dma->flags & _DRM_DMA_USE_AGP)) ||
+ (__HAVE_SG && (dma->flags & _DRM_DMA_USE_SG)) ) {
+ drm_map_t *map = DRIVER_AGP_BUFFERS_MAP( dev );
+
+ if ( !map ) {
+ retcode = EINVAL;
+ goto done;
+ }
+
+ virtual = round_page((vm_offset_t)vms->vm_daddr + MAXDSIZ);
+ retcode = vm_mmap(&vms->vm_map,
+ &virtual,
+ round_page(map->size),
+ PROT_READ|PROT_WRITE, VM_PROT_ALL,
+ MAP_SHARED,
+ SLIST_FIRST(&kdev->si_hlist),
+ (unsigned long)map->offset );
+ } else {
+ virtual = round_page((vm_offset_t)vms->vm_daddr + MAXDSIZ);
+ retcode = vm_mmap(&vms->vm_map,
+ &virtual,
+ round_page(dma->byte_count),
+ PROT_READ|PROT_WRITE, VM_PROT_ALL,
+ MAP_SHARED,
+ SLIST_FIRST(&kdev->si_hlist),
+ 0);
+ }
+ if (retcode)
+ goto done;
+ request.virtual = (void *)virtual;
+
+ for ( i = 0 ; i < dma->buf_count ; i++ ) {
+ if ( DRM_OS_COPYTOUSR( &request.list[i].idx,
+ &dma->buflist[i]->idx,
+ sizeof(request.list[0].idx) ) ) {
+ retcode = EFAULT;
+ goto done;
+ }
+ if ( DRM_OS_COPYTOUSR( &request.list[i].total,
+ &dma->buflist[i]->total,
+ sizeof(request.list[0].total) ) ) {
+ retcode = EFAULT;
+ goto done;
+ }
+ if ( DRM_OS_COPYTOUSR( &request.list[i].used,
+ &zero,
+ sizeof(zero) ) ) {
+ retcode = EFAULT;
+ goto done;
+ }
+ address = virtual + dma->buflist[i]->offset; /* *** */
+ if ( DRM_OS_COPYTOUSR( &request.list[i].address,
+ &address,
+ sizeof(address) ) ) {
+ retcode = EFAULT;
+ goto done;
+ }
+ }
+ }
+ done:
+ request.count = dma->buf_count;
+
+ DRM_DEBUG( "%d buffers, retcode = %d\n", request.count, retcode );
+
+ DRM_OS_KRNTOUSR( (drm_buf_map_t *)data, request, sizeof(request) );
+
+ DRM_OS_RETURN(retcode);
+}
+
+#endif /* __HAVE_DMA */
+