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-rw-r--r--bsd-core/drmP.h7
-rw-r--r--bsd-core/drm_bufs.c170
-rw-r--r--bsd-core/drm_drv.c2
3 files changed, 60 insertions, 119 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 );
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 18:29:41 +0000