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-rw-r--r--linux-core/drm_bufs.c131
1 files changed, 49 insertions, 82 deletions
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c
index 5f1336ff..66de1f88 100644
--- a/linux-core/drm_bufs.c
+++ b/linux-core/drm_bufs.c
@@ -433,25 +433,19 @@ static void drm_cleanup_buf_error(drm_device_t * dev, drm_buf_entry_t * entry)
#if __OS_HAS_AGP
/**
- * Add AGP buffers for DMA transfers (ioctl).
+ * Add AGP buffers for DMA transfers
*
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg pointer to a drm_buf_desc_t request.
+ * \param dev drm_device_t to which the buffers are to be added.
+ * \param request pointer to a drm_buf_desc_t describing the request.
* \return zero on success or a negative number on failure.
*
* After some sanity checks creates a drm_buf structure for each buffer and
* reallocates the buffer list of the same size order to accommodate the new
* buffers.
*/
-int drm_addbufs_agp(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
drm_device_dma_t *dma = dev->dma;
- drm_buf_desc_t request;
drm_buf_entry_t *entry;
drm_buf_t *buf;
unsigned long offset;
@@ -465,25 +459,22 @@ int drm_addbufs_agp(struct inode *inode, struct file *filp,
int byte_count;
int i;
drm_buf_t **temp_buflist;
- drm_buf_desc_t __user *argp = (void __user *)arg;
+
if (!dma)
return -EINVAL;
- if (copy_from_user(&request, argp, sizeof(request)))
- return -EFAULT;
-
- 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)
? PAGE_ALIGN(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);
@@ -596,11 +587,8 @@ int drm_addbufs_agp(struct inode *inode, struct file *filp,
up(&dev->struct_sem);
- request.count = entry->buf_count;
- request.size = size;
-
- if (copy_to_user(argp, &request, sizeof(request)))
- return -EFAULT;
+ request->count = entry->buf_count;
+ request->size = size;
dma->flags = _DRM_DMA_USE_AGP;
@@ -609,13 +597,9 @@ int drm_addbufs_agp(struct inode *inode, struct file *filp,
}
#endif /* __OS_HAS_AGP */
-int drm_addbufs_pci(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
drm_device_dma_t *dma = dev->dma;
- drm_buf_desc_t request;
int count;
int order;
int size;
@@ -631,7 +615,6 @@ int drm_addbufs_pci(struct inode *inode, struct file *filp,
int page_count;
unsigned long *temp_pagelist;
drm_buf_t **temp_buflist;
- drm_buf_desc_t __user *argp = (void __user *)arg;
if (!drm_core_check_feature(dev, DRIVER_PCI_DMA))
return -EINVAL;
@@ -639,22 +622,19 @@ int drm_addbufs_pci(struct inode *inode, struct file *filp,
if (!dma)
return -EINVAL;
- if (copy_from_user(&request, argp, sizeof(request)))
- return -EFAULT;
-
- 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, order, dev->queue_count);
+ request->count, request->size, size, order, dev->queue_count);
if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
return -EINVAL;
if (dev->queue_count)
return -EBUSY; /* Not while in use */
- alignment = (request.flags & _DRM_PAGE_ALIGN)
+ alignment = (request->flags & _DRM_PAGE_ALIGN)
? PAGE_ALIGN(size) : size;
page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
total = PAGE_SIZE << page_order;
@@ -826,25 +806,17 @@ int drm_addbufs_pci(struct inode *inode, struct file *filp,
up(&dev->struct_sem);
- request.count = entry->buf_count;
- request.size = size;
-
- if (copy_to_user(argp, &request, sizeof(request)))
- return -EFAULT;
+ request->count = entry->buf_count;
+ request->size = size;
atomic_dec(&dev->buf_alloc);
return 0;
}
-int drm_addbufs_sg(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
drm_device_dma_t *dma = dev->dma;
- drm_buf_desc_t __user *argp = (void __user *)arg;
- drm_buf_desc_t request;
drm_buf_entry_t *entry;
drm_buf_t *buf;
unsigned long offset;
@@ -865,20 +837,17 @@ int drm_addbufs_sg(struct inode *inode, struct file *filp,
if (!dma)
return -EINVAL;
- if (copy_from_user(&request, argp, sizeof(request)))
- return -EFAULT;
-
- 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)
? PAGE_ALIGN(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);
@@ -993,11 +962,8 @@ int drm_addbufs_sg(struct inode *inode, struct file *filp,
up(&dev->struct_sem);
- request.count = entry->buf_count;
- request.size = size;
-
- if (copy_to_user(argp, &request, sizeof(request)))
- return -EFAULT;
+ request->count = entry->buf_count;
+ request->size = size;
dma->flags = _DRM_DMA_USE_SG;
@@ -1006,13 +972,9 @@ int drm_addbufs_sg(struct inode *inode, struct file *filp,
}
-int drm_addbufs_fb(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
drm_device_dma_t *dma = dev->dma;
- drm_buf_desc_t request;
drm_buf_entry_t *entry;
drm_buf_t *buf;
unsigned long offset;
@@ -1026,7 +988,6 @@ int drm_addbufs_fb(struct inode *inode, struct file *filp,
int byte_count;
int i;
drm_buf_t **temp_buflist;
- drm_buf_desc_t __user *argp = (void __user *)arg;
if (!drm_core_check_feature(dev, DRIVER_FB_DMA))
return -EINVAL;
@@ -1034,20 +995,17 @@ int drm_addbufs_fb(struct inode *inode, struct file *filp,
if (!dma)
return -EINVAL;
- if (copy_from_user(&request, argp, sizeof(request)))
- return -EFAULT;
-
- 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)
? PAGE_ALIGN(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);
@@ -1160,11 +1118,8 @@ int drm_addbufs_fb(struct inode *inode, struct file *filp,
up(&dev->struct_sem);
- request.count = entry->buf_count;
- request.size = size;
-
- if (copy_to_user(argp, &request, sizeof(request)))
- return -EFAULT;
+ request->count = entry->buf_count;
+ request->size = size;
dma->flags = _DRM_DMA_USE_FB;
@@ -1193,6 +1148,8 @@ int drm_addbufs(struct inode *inode, struct file *filp,
drm_buf_desc_t request;
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
+ int ret;
+
if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
return -EINVAL;
@@ -1202,16 +1159,26 @@ int drm_addbufs(struct inode *inode, struct file *filp,
return -EFAULT;
#if __OS_HAS_AGP
- if (request.flags & _DRM_AGP_BUFFER)
- return drm_addbufs_agp(inode, filp, cmd, arg);
+ if (request.flags & _DRM_AGP_BUFFER) {
+ ret = drm_addbufs_agp(dev, & request);
+ }
else
#endif
if (request.flags & _DRM_SG_BUFFER)
- return drm_addbufs_sg(inode, filp, cmd, arg);
+ ret = drm_addbufs_sg(dev, & request);
else if (request.flags & _DRM_FB_BUFFER)
- return drm_addbufs_fb(inode, filp, cmd, arg);
+ ret = drm_addbufs_fb(dev, & request);
else
- return drm_addbufs_pci(inode, filp, cmd, arg);
+ ret = drm_addbufs_pci(dev, & request);
+
+ if (ret == 0) {
+ if (copy_to_user( (void __user *) arg, &request,
+ sizeof(request))) {
+ ret = -EFAULT;
+ }
+ }
+
+ return ret;
}
/**
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 02:11:53 +0000