diff options
-rw-r--r-- | bsd-core/drmP.h | 7 | ||||
-rw-r--r-- | bsd-core/drm_bufs.c | 170 | ||||
-rw-r--r-- | bsd-core/drm_drv.c | 2 | ||||
-rw-r--r-- | bsd/drmP.h | 7 | ||||
-rw-r--r-- | bsd/drm_bufs.h | 170 | ||||
-rw-r--r-- | bsd/drm_drv.h | 2 |
6 files changed, 120 insertions, 238 deletions
diff --git a/bsd-core/drmP.h b/bsd-core/drmP.h index 236dab6d..0957c0f1 100644 --- a/bsd-core/drmP.h +++ b/bsd-core/drmP.h @@ -348,12 +348,12 @@ struct drm_device { int flags; /* Flags to open(2) */ /* Locks */ - DRM_SPINTYPE count_lock; /* For inuse, open_count, buf_use */ + DRM_SPINTYPE count_lock; /* For open_count, buf_use, buf_alloc */ struct lock dev_lock; /* For others */ /* Usage Counters */ int open_count; /* Outstanding files open */ int buf_use; /* Buffers in use -- cannot alloc */ - atomic_t buf_alloc; /* Buffer allocation in progress */ + int buf_alloc; /* Buffer allocation in progress */ /* Performance counters */ unsigned long counters; @@ -597,9 +597,6 @@ extern int DRM(finish)(DRM_IOCTL_ARGS); extern int DRM(addmap)(DRM_IOCTL_ARGS); extern int DRM(rmmap)(DRM_IOCTL_ARGS); #if __HAVE_DMA -extern int DRM(addbufs_agp)(DRM_IOCTL_ARGS); -extern int DRM(addbufs_pci)(DRM_IOCTL_ARGS); -extern int DRM(addbufs_sg)(DRM_IOCTL_ARGS); extern int DRM(addbufs)(DRM_IOCTL_ARGS); extern int DRM(infobufs)(DRM_IOCTL_ARGS); extern int DRM(markbufs)(DRM_IOCTL_ARGS); diff --git a/bsd-core/drm_bufs.c b/bsd-core/drm_bufs.c index c54b68ce..05e5eec9 100644 --- a/bsd-core/drm_bufs.c +++ b/bsd-core/drm_bufs.c @@ -319,11 +319,9 @@ static void DRM(cleanup_buf_error)(drm_buf_entry_t *entry) } #if __REALLY_HAVE_AGP -int DRM(addbufs_agp)( DRM_IOCTL_ARGS ) +static int DRM(addbufs_agp)(drm_device_t *dev, drm_buf_desc_t *request) { - DRM_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; @@ -338,21 +336,17 @@ int DRM(addbufs_agp)( DRM_IOCTL_ARGS ) int i; drm_buf_t **temp_buflist; - if ( !dma ) return DRM_ERR(EINVAL); - - DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); - - count = request.count; - order = DRM(order)( request.size ); + count = request->count; + order = DRM(order)(request->size); size = 1 << order; - alignment = (request.flags & _DRM_PAGE_ALIGN) + 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; + agp_offset = dev->agp->base + request->agp_start; DRM_DEBUG( "count: %d\n", count ); DRM_DEBUG( "order: %d\n", order ); @@ -364,36 +358,18 @@ int DRM(addbufs_agp)( DRM_IOCTL_ARGS ) if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return DRM_ERR(EINVAL); - if ( dev->queue_count ) - return DRM_ERR(EBUSY); /* Not while in use */ - - DRM_SPINLOCK( &dev->count_lock ); - if ( dev->buf_use ) { - DRM_SPINUNLOCK( &dev->count_lock ); - return DRM_ERR(EBUSY); - } - atomic_inc( &dev->buf_alloc ); - DRM_SPINUNLOCK( &dev->count_lock ); DRM_LOCK; entry = &dma->bufs[order]; if ( entry->buf_count ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); /* May only call once for each order */ } - if (count < 0 || count > 4096) { - DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); - return DRM_ERR(EINVAL); - } - entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist), DRM_MEM_BUFS ); if ( !entry->buflist ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); @@ -445,7 +421,6 @@ int DRM(addbufs_agp)( DRM_IOCTL_ARGS ) /* Free the entry because it isn't valid */ DRM(cleanup_buf_error)(entry); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } dma->buflist = temp_buflist; @@ -468,24 +443,19 @@ int DRM(addbufs_agp)( DRM_IOCTL_ARGS ) #endif DRM_UNLOCK; - request.count = entry->buf_count; - request.size = size; - - DRM_COPY_TO_USER_IOCTL( (drm_buf_desc_t *)data, request, sizeof(request) ); + request->count = entry->buf_count; + request->size = size; 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_IOCTL_ARGS ) +static int DRM(addbufs_pci)(drm_device_t *dev, drm_buf_desc_t *request) { - DRM_DEVICE; drm_device_dma_t *dma = dev->dma; - drm_buf_desc_t request; int count; int order; int size; @@ -502,55 +472,33 @@ int DRM(addbufs_pci)( DRM_IOCTL_ARGS ) unsigned long *temp_pagelist; drm_buf_t **temp_buflist; - if ( !dma ) return DRM_ERR(EINVAL); - - DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); - - count = request.count; - order = DRM(order)( request.size ); + 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, + request->count, request->size, size, order, dev->queue_count ); if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return DRM_ERR(EINVAL); - if ( dev->queue_count ) - return DRM_ERR(EBUSY); /* Not while in use */ - alignment = (request.flags & _DRM_PAGE_ALIGN) + 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_SPINLOCK( &dev->count_lock ); - if ( dev->buf_use ) { - DRM_SPINUNLOCK( &dev->count_lock ); - return DRM_ERR(EBUSY); - } - atomic_inc( &dev->buf_alloc ); - DRM_SPINUNLOCK( &dev->count_lock ); - DRM_LOCK; entry = &dma->bufs[order]; if ( entry->buf_count ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); /* May only call once for each order */ } - if (count < 0 || count > 4096) { - DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); - return DRM_ERR(EINVAL); - } - entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist), DRM_MEM_BUFS ); if ( !entry->buflist ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); @@ -562,7 +510,6 @@ int DRM(addbufs_pci)( DRM_IOCTL_ARGS ) count * sizeof(*entry->buflist), DRM_MEM_BUFS ); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } memset( entry->seglist, 0, count * sizeof(*entry->seglist) ); @@ -580,7 +527,6 @@ int DRM(addbufs_pci)( DRM_IOCTL_ARGS ) count * sizeof(*entry->seglist), DRM_MEM_SEGS ); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } @@ -634,7 +580,6 @@ int DRM(addbufs_pci)( DRM_IOCTL_ARGS ) /* Free the entry because it isn't valid */ DRM(cleanup_buf_error)(entry); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } dma->buflist = temp_buflist; @@ -656,23 +601,18 @@ int DRM(addbufs_pci)( DRM_IOCTL_ARGS ) #endif DRM_UNLOCK; - request.count = entry->buf_count; - request.size = size; - - DRM_COPY_TO_USER_IOCTL( (drm_buf_desc_t *)data, request, sizeof(request) ); + request->count = entry->buf_count; + request->size = size; - atomic_dec( &dev->buf_alloc ); return 0; } #endif /* __HAVE_PCI_DMA */ #if __REALLY_HAVE_SG -int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) +static int DRM(addbufs_sg)(drm_device_t *dev, drm_buf_desc_t *request) { - DRM_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; @@ -687,21 +627,17 @@ int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) int i; drm_buf_t **temp_buflist; - if ( !dma ) return DRM_ERR(EINVAL); - - DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); - - count = request.count; - order = DRM(order)( request.size ); + count = request->count; + order = DRM(order)(request->size); size = 1 << order; - alignment = (request.flags & _DRM_PAGE_ALIGN) + 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; + agp_offset = request->agp_start; DRM_DEBUG( "count: %d\n", count ); DRM_DEBUG( "order: %d\n", order ); @@ -713,35 +649,18 @@ int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return DRM_ERR(EINVAL); - if ( dev->queue_count ) return DRM_ERR(EBUSY); /* Not while in use */ - - DRM_SPINLOCK( &dev->count_lock ); - if ( dev->buf_use ) { - DRM_SPINUNLOCK( &dev->count_lock ); - return DRM_ERR(EBUSY); - } - atomic_inc( &dev->buf_alloc ); - DRM_SPINUNLOCK( &dev->count_lock ); DRM_LOCK; entry = &dma->bufs[order]; if ( entry->buf_count ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); /* May only call once for each order */ } - if (count < 0 || count > 4096) { - DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); - return DRM_ERR(EINVAL); - } - entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist), DRM_MEM_BUFS ); if ( !entry->buflist ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); @@ -775,7 +694,6 @@ int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) entry->buf_count = count; DRM(cleanup_buf_error)(entry); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } @@ -800,7 +718,6 @@ int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) /* Free the entry because it isn't valid */ DRM(cleanup_buf_error)(entry); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } dma->buflist = temp_buflist; @@ -823,39 +740,66 @@ int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) #endif DRM_UNLOCK; - request.count = entry->buf_count; - request.size = size; - - DRM_COPY_TO_USER_IOCTL( (drm_buf_desc_t *)data, request, sizeof(request) ); + request->count = entry->buf_count; + request->size = size; dma->flags = _DRM_DMA_USE_SG; - atomic_dec( &dev->buf_alloc ); return 0; } #endif /* __REALLY_HAVE_SG */ int DRM(addbufs)( DRM_IOCTL_ARGS ) { + DRM_DEVICE; drm_buf_desc_t request; + int err; DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); + if (dev->dma == NULL) + return DRM_ERR(EINVAL); + + if (request.count < 0 || request.count > 4096) + return DRM_ERR(EINVAL); + + if (dev->queue_count) + return DRM_ERR(EBUSY); /* Not while in use */ + + DRM_SPINLOCK(&dev->count_lock); + if (dev->buf_use) { + DRM_SPINUNLOCK(&dev->count_lock); + return DRM_ERR(EBUSY); + } + /* dev->buf_alloc acts as a lock to prevent infobufs/mapbufs from + * trying to read from the dma->bufs while buffers are being allocated */ + dev->buf_alloc++; + DRM_SPINUNLOCK(&dev->count_lock); + + #if __REALLY_HAVE_AGP if ( request.flags & _DRM_AGP_BUFFER ) - return DRM(addbufs_agp)( kdev, cmd, data, flags, p, filp ); + err = DRM(addbufs_agp)(dev, &request); else #endif #if __REALLY_HAVE_SG if ( request.flags & _DRM_SG_BUFFER ) - return DRM(addbufs_sg)( kdev, cmd, data, flags, p, filp ); + err = DRM(addbufs_sg)(dev, &request); else #endif #if __HAVE_PCI_DMA - return DRM(addbufs_pci)( kdev, cmd, data, flags, p, filp ); + err = DRM(addbufs_pci)(dev, &request); #else - return DRM_ERR(EINVAL); + err = DRM_ERR(EINVAL); #endif + + DRM_COPY_TO_USER_IOCTL((drm_buf_desc_t *)data, request, sizeof(request)); + + DRM_SPINLOCK(&dev->count_lock); + dev->buf_alloc--; + DRM_SPINUNLOCK(&dev->count_lock); + + return err; } int DRM(infobufs)( DRM_IOCTL_ARGS ) @@ -869,7 +813,7 @@ int DRM(infobufs)( DRM_IOCTL_ARGS ) if ( !dma ) return DRM_ERR(EINVAL); DRM_SPINLOCK( &dev->count_lock ); - if ( atomic_read( &dev->buf_alloc ) ) { + if (dev->buf_alloc != 0) { DRM_SPINUNLOCK( &dev->count_lock ); return DRM_ERR(EBUSY); } @@ -1012,7 +956,7 @@ int DRM(mapbufs)( DRM_IOCTL_ARGS ) if ( !dma ) return DRM_ERR(EINVAL); DRM_SPINLOCK( &dev->count_lock ); - if ( atomic_read( &dev->buf_alloc ) ) { + if (dev->buf_alloc != 0) { DRM_SPINUNLOCK( &dev->count_lock ); return DRM_ERR(EBUSY); } diff --git a/bsd-core/drm_drv.c b/bsd-core/drm_drv.c index 779f4ef4..1006e247 100644 --- a/bsd-core/drm_drv.c +++ b/bsd-core/drm_drv.c @@ -425,7 +425,7 @@ static int DRM(setup)( drm_device_t *dev ) DRIVER_PRESETUP(); dev->buf_use = 0; - atomic_set( &dev->buf_alloc, 0 ); + dev->buf_alloc = 0; #if __HAVE_DMA i = DRM(dma_setup)( dev ); @@ -348,12 +348,12 @@ struct drm_device { int flags; /* Flags to open(2) */ /* Locks */ - DRM_SPINTYPE count_lock; /* For inuse, open_count, buf_use */ + DRM_SPINTYPE count_lock; /* For open_count, buf_use, buf_alloc */ struct lock dev_lock; /* For others */ /* Usage Counters */ int open_count; /* Outstanding files open */ int buf_use; /* Buffers in use -- cannot alloc */ - atomic_t buf_alloc; /* Buffer allocation in progress */ + int buf_alloc; /* Buffer allocation in progress */ /* Performance counters */ unsigned long counters; @@ -597,9 +597,6 @@ extern int DRM(finish)(DRM_IOCTL_ARGS); extern int DRM(addmap)(DRM_IOCTL_ARGS); extern int DRM(rmmap)(DRM_IOCTL_ARGS); #if __HAVE_DMA -extern int DRM(addbufs_agp)(DRM_IOCTL_ARGS); -extern int DRM(addbufs_pci)(DRM_IOCTL_ARGS); -extern int DRM(addbufs_sg)(DRM_IOCTL_ARGS); extern int DRM(addbufs)(DRM_IOCTL_ARGS); extern int DRM(infobufs)(DRM_IOCTL_ARGS); extern int DRM(markbufs)(DRM_IOCTL_ARGS); diff --git a/bsd/drm_bufs.h b/bsd/drm_bufs.h index c54b68ce..05e5eec9 100644 --- a/bsd/drm_bufs.h +++ b/bsd/drm_bufs.h @@ -319,11 +319,9 @@ static void DRM(cleanup_buf_error)(drm_buf_entry_t *entry) } #if __REALLY_HAVE_AGP -int DRM(addbufs_agp)( DRM_IOCTL_ARGS ) +static int DRM(addbufs_agp)(drm_device_t *dev, drm_buf_desc_t *request) { - DRM_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; @@ -338,21 +336,17 @@ int DRM(addbufs_agp)( DRM_IOCTL_ARGS ) int i; drm_buf_t **temp_buflist; - if ( !dma ) return DRM_ERR(EINVAL); - - DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); - - count = request.count; - order = DRM(order)( request.size ); + count = request->count; + order = DRM(order)(request->size); size = 1 << order; - alignment = (request.flags & _DRM_PAGE_ALIGN) + 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; + agp_offset = dev->agp->base + request->agp_start; DRM_DEBUG( "count: %d\n", count ); DRM_DEBUG( "order: %d\n", order ); @@ -364,36 +358,18 @@ int DRM(addbufs_agp)( DRM_IOCTL_ARGS ) if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return DRM_ERR(EINVAL); - if ( dev->queue_count ) - return DRM_ERR(EBUSY); /* Not while in use */ - - DRM_SPINLOCK( &dev->count_lock ); - if ( dev->buf_use ) { - DRM_SPINUNLOCK( &dev->count_lock ); - return DRM_ERR(EBUSY); - } - atomic_inc( &dev->buf_alloc ); - DRM_SPINUNLOCK( &dev->count_lock ); DRM_LOCK; entry = &dma->bufs[order]; if ( entry->buf_count ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); /* May only call once for each order */ } - if (count < 0 || count > 4096) { - DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); - return DRM_ERR(EINVAL); - } - entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist), DRM_MEM_BUFS ); if ( !entry->buflist ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); @@ -445,7 +421,6 @@ int DRM(addbufs_agp)( DRM_IOCTL_ARGS ) /* Free the entry because it isn't valid */ DRM(cleanup_buf_error)(entry); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } dma->buflist = temp_buflist; @@ -468,24 +443,19 @@ int DRM(addbufs_agp)( DRM_IOCTL_ARGS ) #endif DRM_UNLOCK; - request.count = entry->buf_count; - request.size = size; - - DRM_COPY_TO_USER_IOCTL( (drm_buf_desc_t *)data, request, sizeof(request) ); + request->count = entry->buf_count; + request->size = size; 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_IOCTL_ARGS ) +static int DRM(addbufs_pci)(drm_device_t *dev, drm_buf_desc_t *request) { - DRM_DEVICE; drm_device_dma_t *dma = dev->dma; - drm_buf_desc_t request; int count; int order; int size; @@ -502,55 +472,33 @@ int DRM(addbufs_pci)( DRM_IOCTL_ARGS ) unsigned long *temp_pagelist; drm_buf_t **temp_buflist; - if ( !dma ) return DRM_ERR(EINVAL); - - DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); - - count = request.count; - order = DRM(order)( request.size ); + 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, + request->count, request->size, size, order, dev->queue_count ); if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return DRM_ERR(EINVAL); - if ( dev->queue_count ) - return DRM_ERR(EBUSY); /* Not while in use */ - alignment = (request.flags & _DRM_PAGE_ALIGN) + 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_SPINLOCK( &dev->count_lock ); - if ( dev->buf_use ) { - DRM_SPINUNLOCK( &dev->count_lock ); - return DRM_ERR(EBUSY); - } - atomic_inc( &dev->buf_alloc ); - DRM_SPINUNLOCK( &dev->count_lock ); - DRM_LOCK; entry = &dma->bufs[order]; if ( entry->buf_count ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); /* May only call once for each order */ } - if (count < 0 || count > 4096) { - DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); - return DRM_ERR(EINVAL); - } - entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist), DRM_MEM_BUFS ); if ( !entry->buflist ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); @@ -562,7 +510,6 @@ int DRM(addbufs_pci)( DRM_IOCTL_ARGS ) count * sizeof(*entry->buflist), DRM_MEM_BUFS ); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } memset( entry->seglist, 0, count * sizeof(*entry->seglist) ); @@ -580,7 +527,6 @@ int DRM(addbufs_pci)( DRM_IOCTL_ARGS ) count * sizeof(*entry->seglist), DRM_MEM_SEGS ); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } @@ -634,7 +580,6 @@ int DRM(addbufs_pci)( DRM_IOCTL_ARGS ) /* Free the entry because it isn't valid */ DRM(cleanup_buf_error)(entry); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } dma->buflist = temp_buflist; @@ -656,23 +601,18 @@ int DRM(addbufs_pci)( DRM_IOCTL_ARGS ) #endif DRM_UNLOCK; - request.count = entry->buf_count; - request.size = size; - - DRM_COPY_TO_USER_IOCTL( (drm_buf_desc_t *)data, request, sizeof(request) ); + request->count = entry->buf_count; + request->size = size; - atomic_dec( &dev->buf_alloc ); return 0; } #endif /* __HAVE_PCI_DMA */ #if __REALLY_HAVE_SG -int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) +static int DRM(addbufs_sg)(drm_device_t *dev, drm_buf_desc_t *request) { - DRM_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; @@ -687,21 +627,17 @@ int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) int i; drm_buf_t **temp_buflist; - if ( !dma ) return DRM_ERR(EINVAL); - - DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); - - count = request.count; - order = DRM(order)( request.size ); + count = request->count; + order = DRM(order)(request->size); size = 1 << order; - alignment = (request.flags & _DRM_PAGE_ALIGN) + 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; + agp_offset = request->agp_start; DRM_DEBUG( "count: %d\n", count ); DRM_DEBUG( "order: %d\n", order ); @@ -713,35 +649,18 @@ int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return DRM_ERR(EINVAL); - if ( dev->queue_count ) return DRM_ERR(EBUSY); /* Not while in use */ - - DRM_SPINLOCK( &dev->count_lock ); - if ( dev->buf_use ) { - DRM_SPINUNLOCK( &dev->count_lock ); - return DRM_ERR(EBUSY); - } - atomic_inc( &dev->buf_alloc ); - DRM_SPINUNLOCK( &dev->count_lock ); DRM_LOCK; entry = &dma->bufs[order]; if ( entry->buf_count ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); /* May only call once for each order */ } - if (count < 0 || count > 4096) { - DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); - return DRM_ERR(EINVAL); - } - entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist), DRM_MEM_BUFS ); if ( !entry->buflist ) { DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); @@ -775,7 +694,6 @@ int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) entry->buf_count = count; DRM(cleanup_buf_error)(entry); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } @@ -800,7 +718,6 @@ int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) /* Free the entry because it isn't valid */ DRM(cleanup_buf_error)(entry); DRM_UNLOCK; - atomic_dec( &dev->buf_alloc ); return DRM_ERR(ENOMEM); } dma->buflist = temp_buflist; @@ -823,39 +740,66 @@ int DRM(addbufs_sg)( DRM_IOCTL_ARGS ) #endif DRM_UNLOCK; - request.count = entry->buf_count; - request.size = size; - - DRM_COPY_TO_USER_IOCTL( (drm_buf_desc_t *)data, request, sizeof(request) ); + request->count = entry->buf_count; + request->size = size; dma->flags = _DRM_DMA_USE_SG; - atomic_dec( &dev->buf_alloc ); return 0; } #endif /* __REALLY_HAVE_SG */ int DRM(addbufs)( DRM_IOCTL_ARGS ) { + DRM_DEVICE; drm_buf_desc_t request; + int err; DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); + if (dev->dma == NULL) + return DRM_ERR(EINVAL); + + if (request.count < 0 || request.count > 4096) + return DRM_ERR(EINVAL); + + if (dev->queue_count) + return DRM_ERR(EBUSY); /* Not while in use */ + + DRM_SPINLOCK(&dev->count_lock); + if (dev->buf_use) { + DRM_SPINUNLOCK(&dev->count_lock); + return DRM_ERR(EBUSY); + } + /* dev->buf_alloc acts as a lock to prevent infobufs/mapbufs from + * trying to read from the dma->bufs while buffers are being allocated */ + dev->buf_alloc++; + DRM_SPINUNLOCK(&dev->count_lock); + + #if __REALLY_HAVE_AGP if ( request.flags & _DRM_AGP_BUFFER ) - return DRM(addbufs_agp)( kdev, cmd, data, flags, p, filp ); + err = DRM(addbufs_agp)(dev, &request); else #endif #if __REALLY_HAVE_SG if ( request.flags & _DRM_SG_BUFFER ) - return DRM(addbufs_sg)( kdev, cmd, data, flags, p, filp ); + err = DRM(addbufs_sg)(dev, &request); else #endif #if __HAVE_PCI_DMA - return DRM(addbufs_pci)( kdev, cmd, data, flags, p, filp ); + err = DRM(addbufs_pci)(dev, &request); #else - return DRM_ERR(EINVAL); + err = DRM_ERR(EINVAL); #endif + + DRM_COPY_TO_USER_IOCTL((drm_buf_desc_t *)data, request, sizeof(request)); + + DRM_SPINLOCK(&dev->count_lock); + dev->buf_alloc--; + DRM_SPINUNLOCK(&dev->count_lock); + + return err; } int DRM(infobufs)( DRM_IOCTL_ARGS ) @@ -869,7 +813,7 @@ int DRM(infobufs)( DRM_IOCTL_ARGS ) if ( !dma ) return DRM_ERR(EINVAL); DRM_SPINLOCK( &dev->count_lock ); - if ( atomic_read( &dev->buf_alloc ) ) { + if (dev->buf_alloc != 0) { DRM_SPINUNLOCK( &dev->count_lock ); return DRM_ERR(EBUSY); } @@ -1012,7 +956,7 @@ int DRM(mapbufs)( DRM_IOCTL_ARGS ) if ( !dma ) return DRM_ERR(EINVAL); DRM_SPINLOCK( &dev->count_lock ); - if ( atomic_read( &dev->buf_alloc ) ) { + if (dev->buf_alloc != 0) { DRM_SPINUNLOCK( &dev->count_lock ); return DRM_ERR(EBUSY); } diff --git a/bsd/drm_drv.h b/bsd/drm_drv.h index 779f4ef4..1006e247 100644 --- a/bsd/drm_drv.h +++ b/bsd/drm_drv.h @@ -425,7 +425,7 @@ static int DRM(setup)( drm_device_t *dev ) DRIVER_PRESETUP(); dev->buf_use = 0; - atomic_set( &dev->buf_alloc, 0 ); + dev->buf_alloc = 0; #if __HAVE_DMA i = DRM(dma_setup)( dev ); |