Commit 87d3ce11 authored by Al Viro's avatar Al Viro

switch compat_drm_mapbufs() to drm_ioctl_kernel()

Another horror like addbufs; this one is even uglier.  With that
done, drm_ioc32.c should be sane.
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 6113252d
......@@ -1443,15 +1443,15 @@ int drm_legacy_freebufs(struct drm_device *dev, void *data,
* offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls
* drm_mmap_dma().
*/
int drm_legacy_mapbufs(struct drm_device *dev, void *data,
int __drm_legacy_mapbufs(struct drm_device *dev, void *data, int *p,
void __user **v,
int (*f)(void *, int, unsigned long,
struct drm_buf *),
struct drm_file *file_priv)
{
struct drm_device_dma *dma = dev->dma;
int retcode = 0;
const int zero = 0;
unsigned long virtual;
unsigned long address;
struct drm_buf_map *request = data;
int i;
if (!drm_core_check_feature(dev, DRIVER_LEGACY))
......@@ -1471,7 +1471,7 @@ int drm_legacy_mapbufs(struct drm_device *dev, void *data,
dev->buf_use++; /* Can't allocate more after this call */
spin_unlock(&dev->buf_lock);
if (request->count >= dma->buf_count) {
if (*p >= dma->buf_count) {
if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP))
|| (drm_core_check_feature(dev, DRIVER_SG)
&& (dma->flags & _DRM_DMA_USE_SG))) {
......@@ -1496,41 +1496,51 @@ int drm_legacy_mapbufs(struct drm_device *dev, void *data,
retcode = (signed long)virtual;
goto done;
}
request->virtual = (void __user *)virtual;
*v = (void __user *)virtual;
for (i = 0; i < dma->buf_count; i++) {
if (copy_to_user(&request->list[i].idx,
&dma->buflist[i]->idx,
sizeof(request->list[0].idx))) {
retcode = -EFAULT;
goto done;
}
if (copy_to_user(&request->list[i].total,
&dma->buflist[i]->total,
sizeof(request->list[0].total))) {
retcode = -EFAULT;
goto done;
}
if (copy_to_user(&request->list[i].used,
&zero, sizeof(zero))) {
retcode = -EFAULT;
goto done;
}
address = virtual + dma->buflist[i]->offset; /* *** */
if (copy_to_user(&request->list[i].address,
&address, sizeof(address))) {
if (f(data, i, virtual, dma->buflist[i]) < 0) {
retcode = -EFAULT;
goto done;
}
}
}
done:
request->count = dma->buf_count;
DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode);
*p = dma->buf_count;
DRM_DEBUG("%d buffers, retcode = %d\n", *p, retcode);
return retcode;
}
static int map_one_buf(void *data, int idx, unsigned long virtual,
struct drm_buf *buf)
{
struct drm_buf_map *request = data;
unsigned long address = virtual + buf->offset; /* *** */
if (copy_to_user(&request->list[idx].idx, &buf->idx,
sizeof(request->list[0].idx)))
return -EFAULT;
if (copy_to_user(&request->list[idx].total, &buf->total,
sizeof(request->list[0].total)))
return -EFAULT;
if (clear_user(&request->list[idx].used, sizeof(int)))
return -EFAULT;
if (copy_to_user(&request->list[idx].address, &address,
sizeof(address)))
return -EFAULT;
return 0;
}
int drm_legacy_mapbufs(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_buf_map *request = data;
return __drm_legacy_mapbufs(dev, data, &request->count,
&request->virtual, map_one_buf,
file_priv);
}
int drm_legacy_dma_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
......
......@@ -415,54 +415,52 @@ typedef struct drm_buf_map32 {
u32 list; /**< Buffer information */
} drm_buf_map32_t;
static int map_one_buf32(void *data, int idx, unsigned long virtual,
struct drm_buf *buf)
{
drm_buf_map32_t *request = data;
drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx;
drm_buf_pub32_t v;
v.idx = buf->idx;
v.total = buf->total;
v.used = 0;
v.address = virtual + buf->offset;
if (copy_to_user(to, &v, sizeof(v)))
return -EFAULT;
return 0;
}
static int drm_legacy_mapbufs32(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_buf_map32_t *request = data;
void __user *v;
int err = __drm_legacy_mapbufs(dev, data, &request->count,
&v, map_one_buf32,
file_priv);
request->virtual = ptr_to_compat(v);
return err;
}
static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_buf_map32_t __user *argp = (void __user *)arg;
drm_buf_map32_t req32;
drm_buf_pub32_t __user *list32;
struct drm_buf_map __user *request;
struct drm_buf_pub __user *list;
int i, err;
int count, actual;
size_t nbytes;
void __user *addr;
int err;
if (copy_from_user(&req32, argp, sizeof(req32)))
return -EFAULT;
count = req32.count;
list32 = (void __user *)(unsigned long)req32.list;
if (count < 0)
if (req32.count < 0)
return -EINVAL;
nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
request = compat_alloc_user_space(nbytes);
if (!request)
return -EFAULT;
list = (struct drm_buf_pub *) (request + 1);
if (__put_user(count, &request->count)
|| __put_user(list, &request->list))
return -EFAULT;
err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request);
err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
if (err)
return err;
if (__get_user(actual, &request->count))
return -EFAULT;
if (count >= actual)
for (i = 0; i < actual; ++i)
if (__copy_in_user(&list32[i], &list[i],
offsetof(struct drm_buf_pub, address))
|| __get_user(addr, &list[i].address)
|| __put_user((unsigned long)addr,
&list32[i].address))
return -EFAULT;
if (__put_user(actual, &argp->count)
|| __get_user(addr, &request->virtual)
|| __put_user((unsigned long)addr, &argp->virtual))
if (put_user(req32.count, &argp->count)
|| put_user(req32.virtual, &argp->virtual))
return -EFAULT;
return 0;
......@@ -910,7 +908,7 @@ static struct {
DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)].fn = compat_drm_mapbufs,
DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
......
......@@ -76,6 +76,10 @@ int drm_legacy_dma_ioctl(struct drm_device *d, void *v, struct drm_file *f);
int __drm_legacy_infobufs(struct drm_device *, void *, int *,
int (*)(void *, int, struct drm_buf_entry *));
int __drm_legacy_mapbufs(struct drm_device *, void *, int *,
void __user **,
int (*)(void *, int, unsigned long, struct drm_buf *),
struct drm_file *);
#ifdef CONFIG_DRM_VM
void drm_legacy_vma_flush(struct drm_device *d);
......
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