Merge branch 'work.drm' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull DRM compat ioctl handling updates from Al Viro:
 "This kills the double-copies in there and tons of field-by-field
  copyin/copyout.

  Several dead ioctls put to rest, while we are at it - the native
  counterparts had been gone for a decade, so we can bloody well fail
  early on the compat side. No point rearranging the 32bit structure
  into 64bit one (and back) only to be told "piss off, I don't know that
  ioctl" by the native code..."

* 'work.drm' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (29 commits)
  Fix trivial misannotations
  mga: switch compat ioctls to drm_ioctl_kernel()
  radeon: take out dead compat ioctls
  drm compat: ia64 is not biarch
  drm_compat_ioctl(): tidy up a bit
  switch compat_drm_mapbufs() to drm_ioctl_kernel()
  switch compat_drm_rmmap() to drm_ioctl_kernel()
  switch compat_drm_mode_addfb2() to drm_ioctl_kernel()
  switch compat_drm_wait_vblank() to drm_ioctl_kernel()
  switch compat_drm_update_draw()
  compat_drm: switch sg ioctls
  compat_drm: switch AGP compat ioctls to drm_ioctl_kernel()
  switch compat_drm_dma() to drm_ioctl_kernel()
  switch compat_drm_resctx() to drm_ioctl_kernel()
  switch compat_drm_getsareactx() to drm_ioctl_kernel()
  switch compat_drm_setsareactx() to drm_ioctl_kernel()
  switch compat_drm_freebufs() to drm_ioctl_kernel()
  switch compat_drm_markbufs() to drm_ioctl_kernel()
  switch compat_drm_addmap() to drm_ioctl_kernel()
  switch compat_drm_getstats() to drm_ioctl_kernel()
  ...

drivers/gpu/drm/drm_bufs.c

@@ -1258,11 +1258,11 @@ int drm_legacy_addbufs(struct drm_device *dev, void *data,
  * lock, preventing of allocating more buffers after this call. Information
  * about each requested buffer is then copied into user space.
  */
-int drm_legacy_infobufs(struct drm_device *dev, void *data,
-			struct drm_file *file_priv)
+int __drm_legacy_infobufs(struct drm_device *dev,
+			void *data, int *p,
+			int (*f)(void *, int, struct drm_buf_entry *))
 {
 	struct drm_device_dma *dma = dev->dma;
-	struct drm_buf_info *request = data;
 	int i;
 	int count;
 
@@ -1290,26 +1290,12 @@ int drm_legacy_infobufs(struct drm_device *dev, void *data,
 
 	DRM_DEBUG("count = %d\n", count);
 
-	if (request->count >= count) {
+	if (*p >= count) {
 		for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
-			if (dma->bufs[i].buf_count) {
-				struct drm_buf_desc __user *to =
-				    &request->list[count];
-				struct drm_buf_entry *from = &dma->bufs[i];
-				if (copy_to_user(&to->count,
-						 &from->buf_count,
-						 sizeof(from->buf_count)) ||
-				    copy_to_user(&to->size,
-						 &from->buf_size,
-						 sizeof(from->buf_size)) ||
-				    copy_to_user(&to->low_mark,
-						 &from->low_mark,
-						 sizeof(from->low_mark)) ||
-				    copy_to_user(&to->high_mark,
-						 &from->high_mark,
-						 sizeof(from->high_mark)))
+			struct drm_buf_entry *from = &dma->bufs[i];
+			if (from->buf_count) {
+				if (f(data, count, from) < 0)
 					return -EFAULT;
-
 				DRM_DEBUG("%d %d %d %d %d\n",
 					  i,
 					  dma->bufs[i].buf_count,
@@ -1320,11 +1306,29 @@ int drm_legacy_infobufs(struct drm_device *dev, void *data,
 			}
 		}
 	}
-	request->count = count;
+	*p = count;
 
 	return 0;
 }
 
+static int copy_one_buf(void *data, int count, struct drm_buf_entry *from)
+{
+	struct drm_buf_info *request = data;
+	struct drm_buf_desc __user *to = &request->list[count];
+	struct drm_buf_desc v = {.count = from->buf_count,
+				 .size = from->buf_size,
+				 .low_mark = from->low_mark,
+				 .high_mark = from->high_mark};
+	return copy_to_user(to, &v, offsetof(struct drm_buf_desc, flags));
+}
+
+int drm_legacy_infobufs(struct drm_device *dev, void *data,
+			struct drm_file *file_priv)
+{
+	struct drm_buf_info *request = data;
+	return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf);
+}
+
 /**
  * Specifies a low and high water mark for buffer allocation
  *
@@ -1439,15 +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,
-		       struct drm_file *file_priv)
+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))
@@ -1467,7 +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))) {
@@ -1492,41 +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)
 {

drivers/gpu/drm/drm_internal.h

@@ -143,3 +143,6 @@ static inline int drm_debugfs_crtc_crc_add(struct drm_crtc *crtc)
 	return 0;
 }
 #endif
+drm_ioctl_t drm_version;
+drm_ioctl_t drm_getunique;
+drm_ioctl_t drm_getclient;

drivers/gpu/drm/drm_ioc32.c

@@ -32,6 +32,9 @@
 #include <linux/export.h>
 
 #include <drm/drmP.h>
+#include "drm_legacy.h"
+#include "drm_internal.h"
+#include "drm_crtc_internal.h"
 
 #define DRM_IOCTL_VERSION32		DRM_IOWR(0x00, drm_version32_t)
 #define DRM_IOCTL_GET_UNIQUE32		DRM_IOWR(0x01, drm_unique32_t)
@@ -87,39 +90,28 @@ static int compat_drm_version(struct file *file, unsigned int cmd,
 			      unsigned long arg)
 {
 	drm_version32_t v32;
-	struct drm_version __user *version;
+	struct drm_version v;
 	int err;
 
 	if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
 		return -EFAULT;
 
-	version = compat_alloc_user_space(sizeof(*version));
-	if (!version)
-		return -EFAULT;
-	if (__put_user(v32.name_len, &version->name_len)
-	    || __put_user((void __user *)(unsigned long)v32.name,
-			  &version->name)
-	    || __put_user(v32.date_len, &version->date_len)
-	    || __put_user((void __user *)(unsigned long)v32.date,
-			  &version->date)
-	    || __put_user(v32.desc_len, &version->desc_len)
-	    || __put_user((void __user *)(unsigned long)v32.desc,
-			  &version->desc))
-		return -EFAULT;
-
-	err = drm_ioctl(file,
-			DRM_IOCTL_VERSION, (unsigned long)version);
+	v = (struct drm_version) {
+		.name_len = v32.name_len,
+		.name = compat_ptr(v32.name),
+		.date_len = v32.date_len,
+		.date = compat_ptr(v32.date),
+		.desc_len = v32.desc_len,
+		.desc = compat_ptr(v32.desc),
+	};
+	err = drm_ioctl_kernel(file, drm_version, &v,
+			DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW);
 	if (err)
 		return err;
 
-	if (__get_user(v32.version_major, &version->version_major)
-	    || __get_user(v32.version_minor, &version->version_minor)
-	    || __get_user(v32.version_patchlevel, &version->version_patchlevel)
-	    || __get_user(v32.name_len, &version->name_len)
-	    || __get_user(v32.date_len, &version->date_len)
-	    || __get_user(v32.desc_len, &version->desc_len))
-		return -EFAULT;
-
+	v32.version_major = v.version_major;
+	v32.version_minor = v.version_minor;
+	v32.version_patchlevel = v.version_patchlevel;
 	if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
 		return -EFAULT;
 	return 0;
@@ -134,26 +126,21 @@ static int compat_drm_getunique(struct file *file, unsigned int cmd,
 				unsigned long arg)
 {
 	drm_unique32_t uq32;
-	struct drm_unique __user *u;
+	struct drm_unique uq;
 	int err;
 
 	if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 		return -EFAULT;
+	uq = (struct drm_unique){
+		.unique_len = uq32.unique_len,
+		.unique = compat_ptr(uq32.unique),
+	};
 
-	u = compat_alloc_user_space(sizeof(*u));
-	if (!u)
-		return -EFAULT;
-	if (__put_user(uq32.unique_len, &u->unique_len)
-	    || __put_user((void __user *)(unsigned long)uq32.unique,
-			  &u->unique))
-		return -EFAULT;
-
-	err = drm_ioctl(file, DRM_IOCTL_GET_UNIQUE, (unsigned long)u);
+	err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED);
 	if (err)
 		return err;
 
-	if (__get_user(uq32.unique_len, &u->unique_len))
-		return -EFAULT;
+	uq32.unique_len = uq.unique_len;
 	if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
 		return -EFAULT;
 	return 0;
@@ -162,21 +149,8 @@ static int compat_drm_getunique(struct file *file, unsigned int cmd,
 static int compat_drm_setunique(struct file *file, unsigned int cmd,
 				unsigned long arg)
 {
-	drm_unique32_t uq32;
-	struct drm_unique __user *u;
-
-	if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
-		return -EFAULT;
-
-	u = compat_alloc_user_space(sizeof(*u));
-	if (!u)
-		return -EFAULT;
-	if (__put_user(uq32.unique_len, &u->unique_len)
-	    || __put_user((void __user *)(unsigned long)uq32.unique,
-			  &u->unique))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_SET_UNIQUE, (unsigned long)u);
+	/* it's dead */
+	return -EINVAL;
 }
 
 typedef struct drm_map32 {
@@ -193,32 +167,23 @@ static int compat_drm_getmap(struct file *file, unsigned int cmd,
 {
 	drm_map32_t __user *argp = (void __user *)arg;
 	drm_map32_t m32;
-	struct drm_map __user *map;
-	int idx, err;
-	void *handle;
-
-	if (get_user(idx, &argp->offset))
-		return -EFAULT;
+	struct drm_map map;
+	int err;
 
-	map = compat_alloc_user_space(sizeof(*map));
-	if (!map)
-		return -EFAULT;
-	if (__put_user(idx, &map->offset))
+	if (copy_from_user(&m32, argp, sizeof(m32)))
 		return -EFAULT;
 
-	err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map);
+	map.offset = m32.offset;
+	err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
 	if (err)
 		return err;
 
-	if (__get_user(m32.offset, &map->offset)
-	    || __get_user(m32.size, &map->size)
-	    || __get_user(m32.type, &map->type)
-	    || __get_user(m32.flags, &map->flags)
-	    || __get_user(handle, &map->handle)
-	    || __get_user(m32.mtrr, &map->mtrr))
-		return -EFAULT;
-
-	m32.handle = (unsigned long)handle;
+	m32.offset = map.offset;
+	m32.size = map.size;
+	m32.type = map.type;
+	m32.flags = map.flags;
+	m32.handle = ptr_to_compat(map.handle);
+	m32.mtrr = map.mtrr;
 	if (copy_to_user(argp, &m32, sizeof(m32)))
 		return -EFAULT;
 	return 0;
@@ -230,35 +195,28 @@ static int compat_drm_addmap(struct file *file, unsigned int cmd,
 {
 	drm_map32_t __user *argp = (void __user *)arg;
 	drm_map32_t m32;
-	struct drm_map __user *map;
+	struct drm_map map;
 	int err;
-	void *handle;
 
 	if (copy_from_user(&m32, argp, sizeof(m32)))
 		return -EFAULT;
 
-	map = compat_alloc_user_space(sizeof(*map));
-	if (!map)
-		return -EFAULT;
-	if (__put_user(m32.offset, &map->offset)
-	    || __put_user(m32.size, &map->size)
-	    || __put_user(m32.type, &map->type)
-	    || __put_user(m32.flags, &map->flags))
-		return -EFAULT;
+	map.offset = m32.offset;
+	map.size = m32.size;
+	map.type = m32.type;
+	map.flags = m32.flags;
 
-	err = drm_ioctl(file, DRM_IOCTL_ADD_MAP, (unsigned long)map);
+	err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 	if (err)
 		return err;
 
-	if (__get_user(m32.offset, &map->offset)
-	    || __get_user(m32.mtrr, &map->mtrr)
-	    || __get_user(handle, &map->handle))
-		return -EFAULT;
-
-	m32.handle = (unsigned long)handle;
-	if (m32.handle != (unsigned long)handle)
+	m32.offset = map.offset;
+	m32.mtrr = map.mtrr;
+	m32.handle = ptr_to_compat(map.handle);
+	if (map.handle != compat_ptr(m32.handle))
 		pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
-				   handle, m32.type, m32.offset);
+				   map.handle, m32.type, m32.offset);
 
 	if (copy_to_user(argp, &m32, sizeof(m32)))
 		return -EFAULT;
@@ -270,19 +228,13 @@ static int compat_drm_rmmap(struct file *file, unsigned int cmd,
 			    unsigned long arg)
 {
 	drm_map32_t __user *argp = (void __user *)arg;
-	struct drm_map __user *map;
+	struct drm_map map;
 	u32 handle;
 
 	if (get_user(handle, &argp->handle))
 		return -EFAULT;
-
-	map = compat_alloc_user_space(sizeof(*map));
-	if (!map)
-		return -EFAULT;
-	if (__put_user((void *)(unsigned long)handle, &map->handle))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map);
+	map.handle = compat_ptr(handle);
+	return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
 }
 
 typedef struct drm_client32 {
@@ -299,29 +251,24 @@ static int compat_drm_getclient(struct file *file, unsigned int cmd,
 {
 	drm_client32_t c32;
 	drm_client32_t __user *argp = (void __user *)arg;
-	struct drm_client __user *client;
-	int idx, err;
+	struct drm_client client;
+	int err;
 
-	if (get_user(idx, &argp->idx))
+	if (copy_from_user(&c32, argp, sizeof(c32)))
 		return -EFAULT;
 
-	client = compat_alloc_user_space(sizeof(*client));
-	if (!client)
-		return -EFAULT;
-	if (__put_user(idx, &client->idx))
-		return -EFAULT;
+	client.idx = c32.idx;
 
-	err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client);
+	err = drm_ioctl_kernel(file, drm_getclient, &client, DRM_UNLOCKED);
 	if (err)
 		return err;
 
-	if (__get_user(c32.idx, &client->idx)
-	    || __get_user(c32.auth, &client->auth)
-	    || __get_user(c32.pid, &client->pid)
-	    || __get_user(c32.uid, &client->uid)
-	    || __get_user(c32.magic, &client->magic)
-	    || __get_user(c32.iocs, &client->iocs))
-		return -EFAULT;
+	c32.idx = client.idx;
+	c32.auth = client.auth;
+	c32.pid = client.pid;
+	c32.uid = client.uid;
+	c32.magic = client.magic;
+	c32.iocs = client.iocs;
 
 	if (copy_to_user(argp, &c32, sizeof(c32)))
 		return -EFAULT;
@@ -339,28 +286,14 @@ typedef struct drm_stats32 {
 static int compat_drm_getstats(struct file *file, unsigned int cmd,
 			       unsigned long arg)
 {
-	drm_stats32_t s32;
 	drm_stats32_t __user *argp = (void __user *)arg;
-	struct drm_stats __user *stats;
-	int i, err;
-
-	memset(&s32, 0, sizeof(drm_stats32_t));
-	stats = compat_alloc_user_space(sizeof(*stats));
-	if (!stats)
-		return -EFAULT;
+	int err;
 
-	err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats);
+	err = drm_ioctl_kernel(file, drm_noop, NULL, DRM_UNLOCKED);
 	if (err)
 		return err;
 
-	if (__get_user(s32.count, &stats->count))
-		return -EFAULT;
-	for (i = 0; i < 15; ++i)
-		if (__get_user(s32.data[i].value, &stats->data[i].value)
-		    || __get_user(s32.data[i].type, &stats->data[i].type))
-			return -EFAULT;
-
-	if (copy_to_user(argp, &s32, sizeof(s32)))
+	if (clear_user(argp, sizeof(drm_stats32_t)))
 		return -EFAULT;
 	return 0;
 }
@@ -378,26 +311,28 @@ static int compat_drm_addbufs(struct file *file, unsigned int cmd,
 			      unsigned long arg)
 {
 	drm_buf_desc32_t __user *argp = (void __user *)arg;
-	struct drm_buf_desc __user *buf;
+	drm_buf_desc32_t desc32;
+	struct drm_buf_desc desc;
 	int err;
-	unsigned long agp_start;
 
-	buf = compat_alloc_user_space(sizeof(*buf));
-	if (!buf || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
+	if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
 		return -EFAULT;
 
-	if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
-	    || __get_user(agp_start, &argp->agp_start)
-	    || __put_user(agp_start, &buf->agp_start))
-		return -EFAULT;
+	desc = (struct drm_buf_desc){
+		desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
+		desc32.flags, desc32.agp_start
+	};
 
-	err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
+	err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
+				   DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 	if (err)
 		return err;
 
-	if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
-	    || __get_user(agp_start, &buf->agp_start)
-	    || __put_user(agp_start, &argp->agp_start))
+	desc32 = (drm_buf_desc32_t){
+		desc.count, desc.size, desc.low_mark, desc.high_mark,
+		desc.flags, desc.agp_start
+	};
+	if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
 		return -EFAULT;
 
 	return 0;
@@ -408,21 +343,17 @@ static int compat_drm_markbufs(struct file *file, unsigned int cmd,
 {
 	drm_buf_desc32_t b32;
 	drm_buf_desc32_t __user *argp = (void __user *)arg;
-	struct drm_buf_desc __user *buf;
+	struct drm_buf_desc buf;
 
 	if (copy_from_user(&b32, argp, sizeof(b32)))
 		return -EFAULT;
 
-	buf = compat_alloc_user_space(sizeof(*buf));
-	if (!buf)
-		return -EFAULT;
-
-	if (__put_user(b32.size, &buf->size)
-	    || __put_user(b32.low_mark, &buf->low_mark)
-	    || __put_user(b32.high_mark, &buf->high_mark))
-		return -EFAULT;
+	buf.size = b32.size;
+	buf.low_mark = b32.low_mark;
+	buf.high_mark = b32.high_mark;
 
-	return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
+	return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 }
 
 typedef struct drm_buf_info32 {
@@ -430,52 +361,42 @@ typedef struct drm_buf_info32 {
 	u32 list;
 } drm_buf_info32_t;
 
+static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
+{
+	drm_buf_info32_t *request = data;
+	drm_buf_desc32_t __user *to = compat_ptr(request->list);
+	drm_buf_desc32_t v = {.count = from->buf_count,
+			      .size = from->buf_size,
+			      .low_mark = from->low_mark,
+			      .high_mark = from->high_mark};
+	return copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags));
+}
+
+static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
+			struct drm_file *file_priv)
+{
+	drm_buf_info32_t *request = data;
+	return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
+}
+
 static int compat_drm_infobufs(struct file *file, unsigned int cmd,
 			       unsigned long arg)
 {
 	drm_buf_info32_t req32;
 	drm_buf_info32_t __user *argp = (void __user *)arg;
-	drm_buf_desc32_t __user *to;
-	struct drm_buf_info __user *request;
-	struct drm_buf_desc __user *list;
-	size_t nbytes;
-	int i, err;
-	int count, actual;
+	int err;
 
 	if (copy_from_user(&req32, argp, sizeof(req32)))
 		return -EFAULT;
 
-	count = req32.count;
-	to = (drm_buf_desc32_t __user *) (unsigned long)req32.list;
-	if (count < 0)
-		count = 0;
-	if (count > 0
-	    && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
-		return -EFAULT;
-
-	nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
-	request = compat_alloc_user_space(nbytes);
-	if (!request)
-		return -EFAULT;
-	list = (struct drm_buf_desc *) (request + 1);
-
-	if (__put_user(count, &request->count)
-	    || __put_user(list, &request->list))
-		return -EFAULT;
+	if (req32.count < 0)
+		req32.count = 0;
 
-	err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request);
+	err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &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(&to[i], &list[i],
-					   offsetof(struct drm_buf_desc, flags)))
-				return -EFAULT;
-
-	if (__put_user(actual, &argp->count))
+	if (put_user(req32.count, &argp->count))
 		return -EFAULT;
 
 	return 0;
@@ -494,54 +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;
@@ -556,21 +475,15 @@ static int compat_drm_freebufs(struct file *file, unsigned int cmd,
 			       unsigned long arg)
 {
 	drm_buf_free32_t req32;
-	struct drm_buf_free __user *request;
+	struct drm_buf_free request;
 	drm_buf_free32_t __user *argp = (void __user *)arg;
 
 	if (copy_from_user(&req32, argp, sizeof(req32)))
 		return -EFAULT;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request)
-		return -EFAULT;
-	if (__put_user(req32.count, &request->count)
-	    || __put_user((int __user *)(unsigned long)req32.list,
-			  &request->list))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_FREE_BUFS, (unsigned long)request);
+	request.count = req32.count;
+	request.list = compat_ptr(req32.list);
+	return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
 }
 
 typedef struct drm_ctx_priv_map32 {
@@ -582,48 +495,36 @@ static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
 				  unsigned long arg)
 {
 	drm_ctx_priv_map32_t req32;
-	struct drm_ctx_priv_map __user *request;
+	struct drm_ctx_priv_map request;
 	drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 
 	if (copy_from_user(&req32, argp, sizeof(req32)))
 		return -EFAULT;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request)
-		return -EFAULT;
-	if (__put_user(req32.ctx_id, &request->ctx_id)
-	    || __put_user((void *)(unsigned long)req32.handle,
-			  &request->handle))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request);
+	request.ctx_id = req32.ctx_id;
+	request.handle = compat_ptr(req32.handle);
+	return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 }
 
 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
 				  unsigned long arg)
 {
-	struct drm_ctx_priv_map __user *request;
+	struct drm_ctx_priv_map req;
+	drm_ctx_priv_map32_t req32;
 	drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 	int err;
-	unsigned int ctx_id;
-	void *handle;
-
-	if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp))
-	    || __get_user(ctx_id, &argp->ctx_id))
-		return -EFAULT;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request)
-		return -EFAULT;
-	if (__put_user(ctx_id, &request->ctx_id))
+	if (copy_from_user(&req32, argp, sizeof(req32)))
 		return -EFAULT;
 
-	err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
+	req.ctx_id = req32.ctx_id;
+	err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
 	if (err)
 		return err;
 
-	if (__get_user(handle, &request->handle)
-	    || __put_user((unsigned long)handle, &argp->handle))
+	req32.handle = ptr_to_compat(req.handle);
+	if (copy_to_user(argp, &req32, sizeof(req32)))
 		return -EFAULT;
 
 	return 0;
@@ -639,26 +540,20 @@ static int compat_drm_resctx(struct file *file, unsigned int cmd,
 {
 	drm_ctx_res32_t __user *argp = (void __user *)arg;
 	drm_ctx_res32_t res32;
-	struct drm_ctx_res __user *res;
+	struct drm_ctx_res res;
 	int err;
 
 	if (copy_from_user(&res32, argp, sizeof(res32)))
 		return -EFAULT;
 
-	res = compat_alloc_user_space(sizeof(*res));
-	if (!res)
-		return -EFAULT;
-	if (__put_user(res32.count, &res->count)
-	    || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
-			  &res->contexts))
-		return -EFAULT;
-
-	err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res);
+	res.count = res32.count;
+	res.contexts = compat_ptr(res32.contexts);
+	err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
 	if (err)
 		return err;
 
-	if (__get_user(res32.count, &res->count)
-	    || __put_user(res32.count, &argp->count))
+	res32.count = res.count;
+	if (copy_to_user(argp, &res32, sizeof(res32)))
 		return -EFAULT;
 
 	return 0;
@@ -682,38 +577,26 @@ static int compat_drm_dma(struct file *file, unsigned int cmd,
 {
 	drm_dma32_t d32;
 	drm_dma32_t __user *argp = (void __user *)arg;
-	struct drm_dma __user *d;
+	struct drm_dma d;
 	int err;
 
 	if (copy_from_user(&d32, argp, sizeof(d32)))
 		return -EFAULT;
 
-	d = compat_alloc_user_space(sizeof(*d));
-	if (!d)
-		return -EFAULT;
-
-	if (__put_user(d32.context, &d->context)
-	    || __put_user(d32.send_count, &d->send_count)
-	    || __put_user((int __user *)(unsigned long)d32.send_indices,
-			  &d->send_indices)
-	    || __put_user((int __user *)(unsigned long)d32.send_sizes,
-			  &d->send_sizes)
-	    || __put_user(d32.flags, &d->flags)
-	    || __put_user(d32.request_count, &d->request_count)
-	    || __put_user((int __user *)(unsigned long)d32.request_indices,
-			  &d->request_indices)
-	    || __put_user((int __user *)(unsigned long)d32.request_sizes,
-			  &d->request_sizes))
-		return -EFAULT;
-
-	err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d);
+	d.context = d32.context;
+	d.send_count = d32.send_count;
+	d.send_indices = compat_ptr(d32.send_indices);
+	d.send_sizes = compat_ptr(d32.send_sizes);
+	d.flags = d32.flags;
+	d.request_count = d32.request_count;
+	d.request_indices = compat_ptr(d32.request_indices);
+	d.request_sizes = compat_ptr(d32.request_sizes);
+	err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
 	if (err)
 		return err;
 
-	if (__get_user(d32.request_size, &d->request_size)
-	    || __get_user(d32.granted_count, &d->granted_count)
-	    || __put_user(d32.request_size, &argp->request_size)
-	    || __put_user(d32.granted_count, &argp->granted_count))
+	if (put_user(d.request_size, &argp->request_size)
+	    || put_user(d.granted_count, &argp->granted_count))
 		return -EFAULT;
 
 	return 0;
@@ -728,17 +611,13 @@ static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
 				 unsigned long arg)
 {
 	drm_agp_mode32_t __user *argp = (void __user *)arg;
-	drm_agp_mode32_t m32;
-	struct drm_agp_mode __user *mode;
-
-	if (get_user(m32.mode, &argp->mode))
-		return -EFAULT;
+	struct drm_agp_mode mode;
 
-	mode = compat_alloc_user_space(sizeof(*mode));
-	if (put_user(m32.mode, &mode->mode))
+	if (get_user(mode.mode, &argp->mode))
 		return -EFAULT;
 
-	return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
+	return drm_ioctl_kernel(file,  drm_agp_enable_ioctl, &mode,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 }
 
 typedef struct drm_agp_info32 {
@@ -760,28 +639,22 @@ static int compat_drm_agp_info(struct file *file, unsigned int cmd,
 {
 	drm_agp_info32_t __user *argp = (void __user *)arg;
 	drm_agp_info32_t i32;
-	struct drm_agp_info __user *info;
+	struct drm_agp_info info;
 	int err;
 
-	info = compat_alloc_user_space(sizeof(*info));
-	if (!info)
-		return -EFAULT;
-
-	err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
+	err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH);
 	if (err)
 		return err;
 
-	if (__get_user(i32.agp_version_major, &info->agp_version_major)
-	    || __get_user(i32.agp_version_minor, &info->agp_version_minor)
-	    || __get_user(i32.mode, &info->mode)
-	    || __get_user(i32.aperture_base, &info->aperture_base)
-	    || __get_user(i32.aperture_size, &info->aperture_size)
-	    || __get_user(i32.memory_allowed, &info->memory_allowed)
-	    || __get_user(i32.memory_used, &info->memory_used)
-	    || __get_user(i32.id_vendor, &info->id_vendor)
-	    || __get_user(i32.id_device, &info->id_device))
-		return -EFAULT;
-
+	i32.agp_version_major = info.agp_version_major;
+	i32.agp_version_minor = info.agp_version_minor;
+	i32.mode = info.mode;
+	i32.aperture_base = info.aperture_base;
+	i32.aperture_size = info.aperture_size;
+	i32.memory_allowed = info.memory_allowed;
+	i32.memory_used = info.memory_used;
+	i32.id_vendor = info.id_vendor;
+	i32.id_device = info.id_device;
 	if (copy_to_user(argp, &i32, sizeof(i32)))
 		return -EFAULT;
 
@@ -800,26 +673,24 @@ static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
 {
 	drm_agp_buffer32_t __user *argp = (void __user *)arg;
 	drm_agp_buffer32_t req32;
-	struct drm_agp_buffer __user *request;
+	struct drm_agp_buffer request;
 	int err;
 
 	if (copy_from_user(&req32, argp, sizeof(req32)))
 		return -EFAULT;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request
-	    || __put_user(req32.size, &request->size)
-	    || __put_user(req32.type, &request->type))
-		return -EFAULT;
-
-	err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
+	request.size = req32.size;
+	request.type = req32.type;
+	err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 	if (err)
 		return err;
 
-	if (__get_user(req32.handle, &request->handle)
-	    || __get_user(req32.physical, &request->physical)
-	    || copy_to_user(argp, &req32, sizeof(req32))) {
-		drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
+	req32.handle = request.handle;
+	req32.physical = request.physical;
+	if (copy_to_user(argp, &req32, sizeof(req32))) {
+		drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 		return -EFAULT;
 	}
 
@@ -830,16 +701,13 @@ static int compat_drm_agp_free(struct file *file, unsigned int cmd,
 			       unsigned long arg)
 {
 	drm_agp_buffer32_t __user *argp = (void __user *)arg;
-	struct drm_agp_buffer __user *request;
-	u32 handle;
+	struct drm_agp_buffer request;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request
-	    || get_user(handle, &argp->handle)
-	    || __put_user(handle, &request->handle))
+	if (get_user(request.handle, &argp->handle))
 		return -EFAULT;
 
-	return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
+	return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 }
 
 typedef struct drm_agp_binding32 {
@@ -852,34 +720,28 @@ static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
 {
 	drm_agp_binding32_t __user *argp = (void __user *)arg;
 	drm_agp_binding32_t req32;
-	struct drm_agp_binding __user *request;
+	struct drm_agp_binding request;
 
 	if (copy_from_user(&req32, argp, sizeof(req32)))
 		return -EFAULT;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request
-	    || __put_user(req32.handle, &request->handle)
-	    || __put_user(req32.offset, &request->offset))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request);
+	request.handle = req32.handle;
+	request.offset = req32.offset;
+	return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 }
 
 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
 				 unsigned long arg)
 {
 	drm_agp_binding32_t __user *argp = (void __user *)arg;
-	struct drm_agp_binding __user *request;
-	u32 handle;
+	struct drm_agp_binding request;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request
-	    || get_user(handle, &argp->handle)
-	    || __put_user(handle, &request->handle))
+	if (get_user(request.handle, &argp->handle))
 		return -EFAULT;
 
-	return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
+	return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 }
 #endif /* CONFIG_AGP */
 
@@ -892,23 +754,19 @@ static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
 			       unsigned long arg)
 {
 	drm_scatter_gather32_t __user *argp = (void __user *)arg;
-	struct drm_scatter_gather __user *request;
+	struct drm_scatter_gather request;
 	int err;
-	unsigned long x;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
-	    || __get_user(x, &argp->size)
-	    || __put_user(x, &request->size))
+	if (get_user(request.size, &argp->size))
 		return -EFAULT;
 
-	err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request);
+	err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 	if (err)
 		return err;
 
 	/* XXX not sure about the handle conversion here... */
-	if (__get_user(x, &request->handle)
-	    || __put_user(x >> PAGE_SHIFT, &argp->handle))
+	if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
 		return -EFAULT;
 
 	return 0;
@@ -918,19 +776,17 @@ static int compat_drm_sg_free(struct file *file, unsigned int cmd,
 			      unsigned long arg)
 {
 	drm_scatter_gather32_t __user *argp = (void __user *)arg;
-	struct drm_scatter_gather __user *request;
+	struct drm_scatter_gather request;
 	unsigned long x;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
-	    || __get_user(x, &argp->handle)
-	    || __put_user(x << PAGE_SHIFT, &request->handle))
+	if (get_user(x, &argp->handle))
 		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request);
+	request.handle = x << PAGE_SHIFT;
+	return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 }
 
-#if defined(CONFIG_X86) || defined(CONFIG_IA64)
+#if defined(CONFIG_X86)
 typedef struct drm_update_draw32 {
 	drm_drawable_t handle;
 	unsigned int type;
@@ -943,22 +799,11 @@ static int compat_drm_update_draw(struct file *file, unsigned int cmd,
 				  unsigned long arg)
 {
 	drm_update_draw32_t update32;
-	struct drm_update_draw __user *request;
-	int err;
-
 	if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
 		return -EFAULT;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request ||
-	    __put_user(update32.handle, &request->handle) ||
-	    __put_user(update32.type, &request->type) ||
-	    __put_user(update32.num, &request->num) ||
-	    __put_user(update32.data, &request->data))
-		return -EFAULT;
-
-	err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
-	return err;
+	return drm_ioctl_kernel(file, drm_noop, NULL,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 }
 #endif
 
@@ -985,36 +830,30 @@ static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
 {
 	drm_wait_vblank32_t __user *argp = (void __user *)arg;
 	drm_wait_vblank32_t req32;
-	union drm_wait_vblank __user *request;
+	union drm_wait_vblank req;
 	int err;
 
 	if (copy_from_user(&req32, argp, sizeof(req32)))
 		return -EFAULT;
 
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!request
-	    || __put_user(req32.request.type, &request->request.type)
-	    || __put_user(req32.request.sequence, &request->request.sequence)
-	    || __put_user(req32.request.signal, &request->request.signal))
-		return -EFAULT;
-
-	err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
+	req.request.type = req32.request.type;
+	req.request.sequence = req32.request.sequence;
+	req.request.signal = req32.request.signal;
+	err = drm_ioctl_kernel(file, drm_wait_vblank, &req, DRM_UNLOCKED);
 	if (err)
 		return err;
 
-	if (__get_user(req32.reply.type, &request->reply.type)
-	    || __get_user(req32.reply.sequence, &request->reply.sequence)
-	    || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
-	    || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
-		return -EFAULT;
-
+	req32.reply.type = req.reply.type;
+	req32.reply.sequence = req.reply.sequence;
+	req32.reply.tval_sec = req.reply.tval_sec;
+	req32.reply.tval_usec = req.reply.tval_usec;
 	if (copy_to_user(argp, &req32, sizeof(req32)))
 		return -EFAULT;
 
 	return 0;
 }
 
-#if defined(CONFIG_X86) || defined(CONFIG_IA64)
+#if defined(CONFIG_X86)
 typedef struct drm_mode_fb_cmd232 {
 	u32 fb_id;
 	u32 width;
@@ -1031,82 +870,67 @@ static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
 				  unsigned long arg)
 {
 	struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
-	struct drm_mode_fb_cmd232 req32;
-	struct drm_mode_fb_cmd2 __user *req64;
-	int i;
+	struct drm_mode_fb_cmd2 req64;
 	int err;
 
-	if (copy_from_user(&req32, argp, sizeof(req32)))
+	if (copy_from_user(&req64, argp,
+			   offsetof(drm_mode_fb_cmd232_t, modifier)))
 		return -EFAULT;
 
-	req64 = compat_alloc_user_space(sizeof(*req64));
-
-	if (!access_ok(VERIFY_WRITE, req64, sizeof(*req64))
-	    || __put_user(req32.width, &req64->width)
-	    || __put_user(req32.height, &req64->height)
-	    || __put_user(req32.pixel_format, &req64->pixel_format)
-	    || __put_user(req32.flags, &req64->flags))
+	if (copy_from_user(&req64.modifier, &argp->modifier,
+			   sizeof(req64.modifier)))
 		return -EFAULT;
 
-	for (i = 0; i < 4; i++) {
-		if (__put_user(req32.handles[i], &req64->handles[i]))
-			return -EFAULT;
-		if (__put_user(req32.pitches[i], &req64->pitches[i]))
-			return -EFAULT;
-		if (__put_user(req32.offsets[i], &req64->offsets[i]))
-			return -EFAULT;
-		if (__put_user(req32.modifier[i], &req64->modifier[i]))
-			return -EFAULT;
-	}
-
-	err = drm_ioctl(file, DRM_IOCTL_MODE_ADDFB2, (unsigned long)req64);
+	err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64,
+				DRM_CONTROL_ALLOW|DRM_UNLOCKED);
 	if (err)
 		return err;
 
-	if (__get_user(req32.fb_id, &req64->fb_id))
-		return -EFAULT;
-
-	if (copy_to_user(argp, &req32, sizeof(req32)))
+	if (put_user(req64.fb_id, &argp->fb_id))
 		return -EFAULT;
 
 	return 0;
 }
 #endif
 
-static drm_ioctl_compat_t *drm_compat_ioctls[] = {
-	[DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
-	[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
-	[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
-	[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
-	[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
-	[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
-	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
-	[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
-	[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
-	[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
-	[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
-	[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
-	[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
-	[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
-	[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
-	[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
-	[DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
+static struct {
+	drm_ioctl_compat_t *fn;
+	char *name;
+} drm_compat_ioctls[] = {
+#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
+	DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
+	DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
+	DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
+	DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
+	DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
+	DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
+	DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
+	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_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),
+	DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
+	DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
+	DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
 #if IS_ENABLED(CONFIG_AGP)
-	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
-	[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
-	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
-	[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
-	[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
-	[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
+	DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
+	DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
+	DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
+	DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
+	DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
+	DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
 #endif
-	[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
-	[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
+	DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
+	DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
-	[DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
+	DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
 #endif
-	[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
+	DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
-	[DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)] = compat_drm_mode_addfb2,
+	DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
 #endif
 };
 
@@ -1127,6 +951,7 @@ static drm_ioctl_compat_t *drm_compat_ioctls[] = {
 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	unsigned int nr = DRM_IOCTL_NR(cmd);
+	struct drm_file *file_priv = filp->private_data;
 	drm_ioctl_compat_t *fn;
 	int ret;
 
@@ -1137,13 +962,18 @@ long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	if (nr >= ARRAY_SIZE(drm_compat_ioctls))
 		return drm_ioctl(filp, cmd, arg);
 
-	fn = drm_compat_ioctls[nr];
-
-	if (fn != NULL)
-		ret = (*fn) (filp, cmd, arg);
-	else
-		ret = drm_ioctl(filp, cmd, arg);
+	fn = drm_compat_ioctls[nr].fn;
+	if (!fn)
+		return drm_ioctl(filp, cmd, arg);
 
+	DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
+		  task_pid_nr(current),
+		  (long)old_encode_dev(file_priv->minor->kdev->devt),
+		  file_priv->authenticated,
+		  drm_compat_ioctls[nr].name);
+	ret = (*fn)(filp, cmd, arg);
+	if (ret)
+		DRM_DEBUG("ret = %d\n", ret);
 	return ret;
 }
 EXPORT_SYMBOL(drm_compat_ioctl);

drivers/gpu/drm/drm_ioctl.c

@@ -107,7 +107,7 @@
  *
  * Copies the bus id from drm_device::unique into user space.
  */
-static int drm_getunique(struct drm_device *dev, void *data,
+int drm_getunique(struct drm_device *dev, void *data,
 		  struct drm_file *file_priv)
 {
 	struct drm_unique *u = data;
@@ -172,7 +172,7 @@ static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
  * Searches for the client with the specified index and copies its information
  * into userspace
  */
-static int drm_getclient(struct drm_device *dev, void *data,
+int drm_getclient(struct drm_device *dev, void *data,
 		  struct drm_file *file_priv)
 {
 	struct drm_client *client = data;
@@ -461,7 +461,7 @@ static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
  *
  * Fills in the version information in \p arg.
  */
-static int drm_version(struct drm_device *dev, void *data,
+int drm_version(struct drm_device *dev, void *data,
 		       struct drm_file *file_priv)
 {
 	struct drm_version *version = data;
@@ -694,6 +694,33 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
  * structure.
  */
 
+long drm_ioctl_kernel(struct file *file, drm_ioctl_t *func, void *kdata,
+		      u32 flags)
+{
+	struct drm_file *file_priv = file->private_data;
+	struct drm_device *dev = file_priv->minor->dev;
+	int retcode;
+
+	if (drm_device_is_unplugged(dev))
+		return -ENODEV;
+
+	retcode = drm_ioctl_permit(flags, file_priv);
+	if (unlikely(retcode))
+		return retcode;
+
+	/* Enforce sane locking for modern driver ioctls. */
+	if (!drm_core_check_feature(dev, DRIVER_LEGACY) ||
+	    (flags & DRM_UNLOCKED))
+		retcode = func(dev, kdata, file_priv);
+	else {
+		mutex_lock(&drm_global_mutex);
+		retcode = func(dev, kdata, file_priv);
+		mutex_unlock(&drm_global_mutex);
+	}
+	return retcode;
+}
+EXPORT_SYMBOL(drm_ioctl_kernel);
+
 /**
  * drm_ioctl - ioctl callback implementation for DRM drivers
  * @filp: file this ioctl is called on
@@ -762,10 +789,6 @@ long drm_ioctl(struct file *filp,
 		goto err_i1;
 	}
 
-	retcode = drm_ioctl_permit(ioctl->flags, file_priv);
-	if (unlikely(retcode))
-		goto err_i1;
-
 	if (ksize <= sizeof(stack_kdata)) {
 		kdata = stack_kdata;
 	} else {
@@ -784,16 +807,7 @@ long drm_ioctl(struct file *filp,
 	if (ksize > in_size)
 		memset(kdata + in_size, 0, ksize - in_size);
 
-	/* Enforce sane locking for modern driver ioctls. */
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY) ||
-	    (ioctl->flags & DRM_UNLOCKED))
-		retcode = func(dev, kdata, file_priv);
-	else {
-		mutex_lock(&drm_global_mutex);
-		retcode = func(dev, kdata, file_priv);
-		mutex_unlock(&drm_global_mutex);
-	}
-
+	retcode = drm_ioctl_kernel(filp, func, kdata, ioctl->flags);
 	if (copy_to_user((void __user *)arg, kdata, out_size) != 0)
 		retcode = -EFAULT;
 

drivers/gpu/drm/drm_legacy.h

@@ -74,6 +74,13 @@ int drm_legacy_freebufs(struct drm_device *d, void *v, struct drm_file *f);
 int drm_legacy_mapbufs(struct drm_device *d, void *v, struct drm_file *f);
 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);
 #else

drivers/gpu/drm/mga/mga_drv.h

@@ -159,6 +159,8 @@ extern int mga_dma_bootstrap(struct drm_device *dev, void *data,
 			     struct drm_file *file_priv);
 extern int mga_dma_init(struct drm_device *dev, void *data,
 			struct drm_file *file_priv);
+extern int mga_getparam(struct drm_device *dev, void *data,
+			struct drm_file *file_priv);
 extern int mga_dma_flush(struct drm_device *dev, void *data,
 			 struct drm_file *file_priv);
 extern int mga_dma_reset(struct drm_device *dev, void *data,

drivers/gpu/drm/mga/mga_ioc32.c

@@ -61,46 +61,25 @@ static int compat_mga_init(struct file *file, unsigned int cmd,
 			   unsigned long arg)
 {
 	drm_mga_init32_t init32;
-	drm_mga_init_t __user *init;
-	int err = 0, i;
+	drm_mga_init_t init;
 
 	if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
 		return -EFAULT;
 
-	init = compat_alloc_user_space(sizeof(*init));
-	if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
-	    || __put_user(init32.func, &init->func)
-	    || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
-	    || __put_user(init32.chipset, &init->chipset)
-	    || __put_user(init32.sgram, &init->sgram)
-	    || __put_user(init32.maccess, &init->maccess)
-	    || __put_user(init32.fb_cpp, &init->fb_cpp)
-	    || __put_user(init32.front_offset, &init->front_offset)
-	    || __put_user(init32.front_pitch, &init->front_pitch)
-	    || __put_user(init32.back_offset, &init->back_offset)
-	    || __put_user(init32.back_pitch, &init->back_pitch)
-	    || __put_user(init32.depth_cpp, &init->depth_cpp)
-	    || __put_user(init32.depth_offset, &init->depth_offset)
-	    || __put_user(init32.depth_pitch, &init->depth_pitch)
-	    || __put_user(init32.fb_offset, &init->fb_offset)
-	    || __put_user(init32.mmio_offset, &init->mmio_offset)
-	    || __put_user(init32.status_offset, &init->status_offset)
-	    || __put_user(init32.warp_offset, &init->warp_offset)
-	    || __put_user(init32.primary_offset, &init->primary_offset)
-	    || __put_user(init32.buffers_offset, &init->buffers_offset))
-		return -EFAULT;
-
-	for (i = 0; i < MGA_NR_TEX_HEAPS; i++) {
-		err |=
-		    __put_user(init32.texture_offset[i],
-			       &init->texture_offset[i]);
-		err |=
-		    __put_user(init32.texture_size[i], &init->texture_size[i]);
-	}
-	if (err)
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_MGA_INIT, (unsigned long)init);
+	init.func = init32.func;
+	init.sarea_priv_offset = init32.sarea_priv_offset;
+	memcpy(&init.chipset, &init32.chipset,
+		offsetof(drm_mga_init_t, fb_offset) -
+		offsetof(drm_mga_init_t, chipset));
+	init.fb_offset = init32.fb_offset;
+	init.mmio_offset = init32.mmio_offset;
+	init.status_offset = init32.status_offset;
+	init.warp_offset = init32.warp_offset;
+	init.primary_offset = init32.primary_offset;
+	init.buffers_offset = init32.buffers_offset;
+
+	return drm_ioctl_kernel(file, mga_dma_init, &init,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 }
 
 typedef struct drm_mga_getparam32 {
@@ -112,19 +91,14 @@ static int compat_mga_getparam(struct file *file, unsigned int cmd,
 			       unsigned long arg)
 {
 	drm_mga_getparam32_t getparam32;
-	drm_mga_getparam_t __user *getparam;
+	drm_mga_getparam_t getparam;
 
 	if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
 		return -EFAULT;
 
-	getparam = compat_alloc_user_space(sizeof(*getparam));
-	if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
-	    || __put_user(getparam32.param, &getparam->param)
-	    || __put_user((void __user *)(unsigned long)getparam32.value,
-			  &getparam->value))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_MGA_GETPARAM, (unsigned long)getparam);
+	getparam.param = getparam32.param;
+	getparam.value = compat_ptr(getparam32.value);
+	return drm_ioctl_kernel(file, mga_getparam, &getparam, DRM_AUTH);
 }
 
 typedef struct drm_mga_drm_bootstrap32 {
@@ -141,48 +115,33 @@ static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
 				    unsigned long arg)
 {
 	drm_mga_dma_bootstrap32_t dma_bootstrap32;
-	drm_mga_dma_bootstrap_t __user *dma_bootstrap;
+	drm_mga_dma_bootstrap_t dma_bootstrap;
 	int err;
 
 	if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
 			   sizeof(dma_bootstrap32)))
 		return -EFAULT;
 
-	dma_bootstrap = compat_alloc_user_space(sizeof(*dma_bootstrap));
-	if (!access_ok(VERIFY_WRITE, dma_bootstrap, sizeof(*dma_bootstrap))
-	    || __put_user(dma_bootstrap32.texture_handle,
-			  &dma_bootstrap->texture_handle)
-	    || __put_user(dma_bootstrap32.texture_size,
-			  &dma_bootstrap->texture_size)
-	    || __put_user(dma_bootstrap32.primary_size,
-			  &dma_bootstrap->primary_size)
-	    || __put_user(dma_bootstrap32.secondary_bin_count,
-			  &dma_bootstrap->secondary_bin_count)
-	    || __put_user(dma_bootstrap32.secondary_bin_size,
-			  &dma_bootstrap->secondary_bin_size)
-	    || __put_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
-	    || __put_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
-		return -EFAULT;
+	dma_bootstrap.texture_handle = dma_bootstrap32.texture_handle;
+	dma_bootstrap.texture_size = dma_bootstrap32.texture_size;
+	dma_bootstrap.primary_size = dma_bootstrap32.primary_size;
+	dma_bootstrap.secondary_bin_count = dma_bootstrap32.secondary_bin_count;
+	dma_bootstrap.secondary_bin_size = dma_bootstrap32.secondary_bin_size;
+	dma_bootstrap.agp_mode = dma_bootstrap32.agp_mode;
+	dma_bootstrap.agp_size = dma_bootstrap32.agp_size;
 
-	err = drm_ioctl(file, DRM_IOCTL_MGA_DMA_BOOTSTRAP,
-			(unsigned long)dma_bootstrap);
+	err = drm_ioctl_kernel(file, mga_dma_bootstrap, &dma_bootstrap,
+				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 	if (err)
 		return err;
 
-	if (__get_user(dma_bootstrap32.texture_handle,
-		       &dma_bootstrap->texture_handle)
-	    || __get_user(dma_bootstrap32.texture_size,
-			  &dma_bootstrap->texture_size)
-	    || __get_user(dma_bootstrap32.primary_size,
-			  &dma_bootstrap->primary_size)
-	    || __get_user(dma_bootstrap32.secondary_bin_count,
-			  &dma_bootstrap->secondary_bin_count)
-	    || __get_user(dma_bootstrap32.secondary_bin_size,
-			  &dma_bootstrap->secondary_bin_size)
-	    || __get_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
-	    || __get_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
-		return -EFAULT;
-
+	dma_bootstrap32.texture_handle = dma_bootstrap.texture_handle;
+	dma_bootstrap32.texture_size = dma_bootstrap.texture_size;
+	dma_bootstrap32.primary_size = dma_bootstrap.primary_size;
+	dma_bootstrap32.secondary_bin_count = dma_bootstrap.secondary_bin_count;
+	dma_bootstrap32.secondary_bin_size = dma_bootstrap.secondary_bin_size;
+	dma_bootstrap32.agp_mode = dma_bootstrap.agp_mode;
+	dma_bootstrap32.agp_size = dma_bootstrap.agp_size;
 	if (copy_to_user((void __user *)arg, &dma_bootstrap32,
 			 sizeof(dma_bootstrap32)))
 		return -EFAULT;
@@ -190,10 +149,14 @@ static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
 	return 0;
 }
 
-drm_ioctl_compat_t *mga_compat_ioctls[] = {
-	[DRM_MGA_INIT] = compat_mga_init,
-	[DRM_MGA_GETPARAM] = compat_mga_getparam,
-	[DRM_MGA_DMA_BOOTSTRAP] = compat_mga_dma_bootstrap,
+static struct {
+	drm_ioctl_compat_t *fn;
+	char *name;
+} mga_compat_ioctls[] = {
+#define DRM_IOCTL32_DEF(n, f)[DRM_##n] = {.fn = f, .name = #n}
+	DRM_IOCTL32_DEF(MGA_INIT, compat_mga_init),
+	DRM_IOCTL32_DEF(MGA_GETPARAM, compat_mga_getparam),
+	DRM_IOCTL32_DEF(MGA_DMA_BOOTSTRAP, compat_mga_dma_bootstrap),
 };
 
 /**
@@ -208,19 +171,27 @@ drm_ioctl_compat_t *mga_compat_ioctls[] = {
 long mga_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	unsigned int nr = DRM_IOCTL_NR(cmd);
+	struct drm_file *file_priv = filp->private_data;
 	drm_ioctl_compat_t *fn = NULL;
 	int ret;
 
 	if (nr < DRM_COMMAND_BASE)
 		return drm_compat_ioctl(filp, cmd, arg);
 
-	if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))
-		fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE];
-
-	if (fn != NULL)
-		ret = (*fn) (filp, cmd, arg);
-	else
-		ret = drm_ioctl(filp, cmd, arg);
-
+	if (nr >= DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))
+		return drm_ioctl(filp, cmd, arg);
+
+	fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE].fn;
+	if (!fn)
+		return drm_ioctl(filp, cmd, arg);
+
+	DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
+		  task_pid_nr(current),
+		  (long)old_encode_dev(file_priv->minor->kdev->devt),
+		  file_priv->authenticated,
+		  mga_compat_ioctls[nr - DRM_COMMAND_BASE].name);
+	ret = (*fn) (filp, cmd, arg);
+	if (ret)
+		DRM_DEBUG("ret = %d\n", ret);
 	return ret;
 }

drivers/gpu/drm/mga/mga_state.c

@@ -1005,7 +1005,7 @@ static int mga_dma_blit(struct drm_device *dev, void *data, struct drm_file *fil
 	return 0;
 }
 
-static int mga_getparam(struct drm_device *dev, void *data, struct drm_file *file_priv)
+int mga_getparam(struct drm_device *dev, void *data, struct drm_file *file_priv)
 {
 	drm_mga_private_t *dev_priv = dev->dev_private;
 	drm_mga_getparam_t *param = data;

drivers/gpu/drm/radeon/Makefile

@@ -105,7 +105,6 @@ radeon-y += \
 	vce_v2_0.o \
 	radeon_kfd.o
 
-radeon-$(CONFIG_COMPAT) += radeon_ioc32.o
 radeon-$(CONFIG_VGA_SWITCHEROO) += radeon_atpx_handler.o
 radeon-$(CONFIG_ACPI) += radeon_acpi.o
 

drivers/gpu/drm/radeon/radeon_drv.c

@@ -38,6 +38,7 @@
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <linux/vga_switcheroo.h>
+#include <linux/compat.h>
 #include <drm/drm_gem.h>
 #include <drm/drm_fb_helper.h>
 
@@ -154,8 +155,6 @@ void radeon_gem_prime_unpin(struct drm_gem_object *obj);
 struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *);
 void *radeon_gem_prime_vmap(struct drm_gem_object *obj);
 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
-extern long radeon_kms_compat_ioctl(struct file *filp, unsigned int cmd,
-				    unsigned long arg);
 
 /* atpx handler */
 #if defined(CONFIG_VGA_SWITCHEROO)
@@ -505,6 +504,21 @@ long radeon_drm_ioctl(struct file *filp,
 	return ret;
 }
 
+#ifdef CONFIG_COMPAT
+static long radeon_kms_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	unsigned int nr = DRM_IOCTL_NR(cmd);
+	int ret;
+
+	if (nr < DRM_COMMAND_BASE)
+		return drm_compat_ioctl(filp, cmd, arg);
+
+	ret = radeon_drm_ioctl(filp, cmd, arg);
+
+	return ret;
+}
+#endif
+
 static const struct dev_pm_ops radeon_pm_ops = {
 	.suspend = radeon_pmops_suspend,
 	.resume = radeon_pmops_resume,

drivers/gpu/drm/radeon/radeon_ioc32.c

-/**
- * \file radeon_ioc32.c
- *
- * 32-bit ioctl compatibility routines for the Radeon DRM.
- *
- * \author Paul Mackerras <paulus@samba.org>
- *
- * Copyright (C) Paul Mackerras 2005
- * 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
- * THE AUTHOR 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.
- */
-#include <linux/compat.h>
-
-#include <drm/drmP.h>
-#include <drm/radeon_drm.h>
-#include "radeon_drv.h"
-
-typedef struct drm_radeon_init32 {
-	int func;
-	u32 sarea_priv_offset;
-	int is_pci;
-	int cp_mode;
-	int gart_size;
-	int ring_size;
-	int usec_timeout;
-
-	unsigned int fb_bpp;
-	unsigned int front_offset, front_pitch;
-	unsigned int back_offset, back_pitch;
-	unsigned int depth_bpp;
-	unsigned int depth_offset, depth_pitch;
-
-	u32 fb_offset;
-	u32 mmio_offset;
-	u32 ring_offset;
-	u32 ring_rptr_offset;
-	u32 buffers_offset;
-	u32 gart_textures_offset;
-} drm_radeon_init32_t;
-
-static int compat_radeon_cp_init(struct file *file, unsigned int cmd,
-				 unsigned long arg)
-{
-	drm_radeon_init32_t init32;
-	drm_radeon_init_t __user *init;
-
-	if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
-		return -EFAULT;
-
-	init = compat_alloc_user_space(sizeof(*init));
-	if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
-	    || __put_user(init32.func, &init->func)
-	    || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
-	    || __put_user(init32.is_pci, &init->is_pci)
-	    || __put_user(init32.cp_mode, &init->cp_mode)
-	    || __put_user(init32.gart_size, &init->gart_size)
-	    || __put_user(init32.ring_size, &init->ring_size)
-	    || __put_user(init32.usec_timeout, &init->usec_timeout)
-	    || __put_user(init32.fb_bpp, &init->fb_bpp)
-	    || __put_user(init32.front_offset, &init->front_offset)
-	    || __put_user(init32.front_pitch, &init->front_pitch)
-	    || __put_user(init32.back_offset, &init->back_offset)
-	    || __put_user(init32.back_pitch, &init->back_pitch)
-	    || __put_user(init32.depth_bpp, &init->depth_bpp)
-	    || __put_user(init32.depth_offset, &init->depth_offset)
-	    || __put_user(init32.depth_pitch, &init->depth_pitch)
-	    || __put_user(init32.fb_offset, &init->fb_offset)
-	    || __put_user(init32.mmio_offset, &init->mmio_offset)
-	    || __put_user(init32.ring_offset, &init->ring_offset)
-	    || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
-	    || __put_user(init32.buffers_offset, &init->buffers_offset)
-	    || __put_user(init32.gart_textures_offset,
-			  &init->gart_textures_offset))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RADEON_CP_INIT, (unsigned long)init);
-}
-
-typedef struct drm_radeon_clear32 {
-	unsigned int flags;
-	unsigned int clear_color;
-	unsigned int clear_depth;
-	unsigned int color_mask;
-	unsigned int depth_mask;	/* misnamed field:  should be stencil */
-	u32 depth_boxes;
-} drm_radeon_clear32_t;
-
-static int compat_radeon_cp_clear(struct file *file, unsigned int cmd,
-				  unsigned long arg)
-{
-	drm_radeon_clear32_t clr32;
-	drm_radeon_clear_t __user *clr;
-
-	if (copy_from_user(&clr32, (void __user *)arg, sizeof(clr32)))
-		return -EFAULT;
-
-	clr = compat_alloc_user_space(sizeof(*clr));
-	if (!access_ok(VERIFY_WRITE, clr, sizeof(*clr))
-	    || __put_user(clr32.flags, &clr->flags)
-	    || __put_user(clr32.clear_color, &clr->clear_color)
-	    || __put_user(clr32.clear_depth, &clr->clear_depth)
-	    || __put_user(clr32.color_mask, &clr->color_mask)
-	    || __put_user(clr32.depth_mask, &clr->depth_mask)
-	    || __put_user((void __user *)(unsigned long)clr32.depth_boxes,
-			  &clr->depth_boxes))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RADEON_CLEAR, (unsigned long)clr);
-}
-
-typedef struct drm_radeon_stipple32 {
-	u32 mask;
-} drm_radeon_stipple32_t;
-
-static int compat_radeon_cp_stipple(struct file *file, unsigned int cmd,
-				    unsigned long arg)
-{
-	drm_radeon_stipple32_t __user *argp = (void __user *)arg;
-	drm_radeon_stipple_t __user *request;
-	u32 mask;
-
-	if (get_user(mask, &argp->mask))
-		return -EFAULT;
-
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
-	    || __put_user((unsigned int __user *)(unsigned long)mask,
-			  &request->mask))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RADEON_STIPPLE, (unsigned long)request);
-}
-
-typedef struct drm_radeon_tex_image32 {
-	unsigned int x, y;	/* Blit coordinates */
-	unsigned int width, height;
-	u32 data;
-} drm_radeon_tex_image32_t;
-
-typedef struct drm_radeon_texture32 {
-	unsigned int offset;
-	int pitch;
-	int format;
-	int width;		/* Texture image coordinates */
-	int height;
-	u32 image;
-} drm_radeon_texture32_t;
-
-static int compat_radeon_cp_texture(struct file *file, unsigned int cmd,
-				    unsigned long arg)
-{
-	drm_radeon_texture32_t req32;
-	drm_radeon_texture_t __user *request;
-	drm_radeon_tex_image32_t img32;
-	drm_radeon_tex_image_t __user *image;
-
-	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
-		return -EFAULT;
-	if (req32.image == 0)
-		return -EINVAL;
-	if (copy_from_user(&img32, (void __user *)(unsigned long)req32.image,
-			   sizeof(img32)))
-		return -EFAULT;
-
-	request = compat_alloc_user_space(sizeof(*request) + sizeof(*image));
-	if (!access_ok(VERIFY_WRITE, request,
-		       sizeof(*request) + sizeof(*image)))
-		return -EFAULT;
-	image = (drm_radeon_tex_image_t __user *) (request + 1);
-
-	if (__put_user(req32.offset, &request->offset)
-	    || __put_user(req32.pitch, &request->pitch)
-	    || __put_user(req32.format, &request->format)
-	    || __put_user(req32.width, &request->width)
-	    || __put_user(req32.height, &request->height)
-	    || __put_user(image, &request->image)
-	    || __put_user(img32.x, &image->x)
-	    || __put_user(img32.y, &image->y)
-	    || __put_user(img32.width, &image->width)
-	    || __put_user(img32.height, &image->height)
-	    || __put_user((const void __user *)(unsigned long)img32.data,
-			  &image->data))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RADEON_TEXTURE, (unsigned long)request);
-}
-
-typedef struct drm_radeon_vertex2_32 {
-	int idx;		/* Index of vertex buffer */
-	int discard;		/* Client finished with buffer? */
-	int nr_states;
-	u32 state;
-	int nr_prims;
-	u32 prim;
-} drm_radeon_vertex2_32_t;
-
-static int compat_radeon_cp_vertex2(struct file *file, unsigned int cmd,
-				    unsigned long arg)
-{
-	drm_radeon_vertex2_32_t req32;
-	drm_radeon_vertex2_t __user *request;
-
-	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
-		return -EFAULT;
-
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
-	    || __put_user(req32.idx, &request->idx)
-	    || __put_user(req32.discard, &request->discard)
-	    || __put_user(req32.nr_states, &request->nr_states)
-	    || __put_user((void __user *)(unsigned long)req32.state,
-			  &request->state)
-	    || __put_user(req32.nr_prims, &request->nr_prims)
-	    || __put_user((void __user *)(unsigned long)req32.prim,
-			  &request->prim))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RADEON_VERTEX2, (unsigned long)request);
-}
-
-typedef struct drm_radeon_cmd_buffer32 {
-	int bufsz;
-	u32 buf;
-	int nbox;
-	u32 boxes;
-} drm_radeon_cmd_buffer32_t;
-
-static int compat_radeon_cp_cmdbuf(struct file *file, unsigned int cmd,
-				   unsigned long arg)
-{
-	drm_radeon_cmd_buffer32_t req32;
-	drm_radeon_cmd_buffer_t __user *request;
-
-	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
-		return -EFAULT;
-
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
-	    || __put_user(req32.bufsz, &request->bufsz)
-	    || __put_user((void __user *)(unsigned long)req32.buf,
-			  &request->buf)
-	    || __put_user(req32.nbox, &request->nbox)
-	    || __put_user((void __user *)(unsigned long)req32.boxes,
-			  &request->boxes))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RADEON_CMDBUF, (unsigned long)request);
-}
-
-typedef struct drm_radeon_getparam32 {
-	int param;
-	u32 value;
-} drm_radeon_getparam32_t;
-
-static int compat_radeon_cp_getparam(struct file *file, unsigned int cmd,
-				     unsigned long arg)
-{
-	drm_radeon_getparam32_t req32;
-	drm_radeon_getparam_t __user *request;
-
-	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
-		return -EFAULT;
-
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
-	    || __put_user(req32.param, &request->param)
-	    || __put_user((void __user *)(unsigned long)req32.value,
-			  &request->value))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RADEON_GETPARAM, (unsigned long)request);
-}
-
-typedef struct drm_radeon_mem_alloc32 {
-	int region;
-	int alignment;
-	int size;
-	u32 region_offset;	/* offset from start of fb or GART */
-} drm_radeon_mem_alloc32_t;
-
-static int compat_radeon_mem_alloc(struct file *file, unsigned int cmd,
-				   unsigned long arg)
-{
-	drm_radeon_mem_alloc32_t req32;
-	drm_radeon_mem_alloc_t __user *request;
-
-	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
-		return -EFAULT;
-
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
-	    || __put_user(req32.region, &request->region)
-	    || __put_user(req32.alignment, &request->alignment)
-	    || __put_user(req32.size, &request->size)
-	    || __put_user((int __user *)(unsigned long)req32.region_offset,
-			  &request->region_offset))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RADEON_ALLOC, (unsigned long)request);
-}
-
-typedef struct drm_radeon_irq_emit32 {
-	u32 irq_seq;
-} drm_radeon_irq_emit32_t;
-
-static int compat_radeon_irq_emit(struct file *file, unsigned int cmd,
-				  unsigned long arg)
-{
-	drm_radeon_irq_emit32_t req32;
-	drm_radeon_irq_emit_t __user *request;
-
-	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
-		return -EFAULT;
-
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
-	    || __put_user((int __user *)(unsigned long)req32.irq_seq,
-			  &request->irq_seq))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RADEON_IRQ_EMIT, (unsigned long)request);
-}
-
-/* The two 64-bit arches where alignof(u64)==4 in 32-bit code */
-#if defined (CONFIG_X86_64) || defined(CONFIG_IA64)
-typedef struct drm_radeon_setparam32 {
-	int param;
-	u64 value;
-} __attribute__((packed)) drm_radeon_setparam32_t;
-
-static int compat_radeon_cp_setparam(struct file *file, unsigned int cmd,
-				     unsigned long arg)
-{
-	drm_radeon_setparam32_t req32;
-	drm_radeon_setparam_t __user *request;
-
-	if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
-		return -EFAULT;
-
-	request = compat_alloc_user_space(sizeof(*request));
-	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
-	    || __put_user(req32.param, &request->param)
-	    || __put_user((void __user *)(unsigned long)req32.value,
-			  &request->value))
-		return -EFAULT;
-
-	return drm_ioctl(file, DRM_IOCTL_RADEON_SETPARAM, (unsigned long) request);
-}
-#else
-#define compat_radeon_cp_setparam NULL
-#endif /* X86_64 || IA64 */
-
-static drm_ioctl_compat_t *radeon_compat_ioctls[] = {
-	[DRM_RADEON_CP_INIT] = compat_radeon_cp_init,
-	[DRM_RADEON_CLEAR] = compat_radeon_cp_clear,
-	[DRM_RADEON_STIPPLE] = compat_radeon_cp_stipple,
-	[DRM_RADEON_TEXTURE] = compat_radeon_cp_texture,
-	[DRM_RADEON_VERTEX2] = compat_radeon_cp_vertex2,
-	[DRM_RADEON_CMDBUF] = compat_radeon_cp_cmdbuf,
-	[DRM_RADEON_GETPARAM] = compat_radeon_cp_getparam,
-	[DRM_RADEON_SETPARAM] = compat_radeon_cp_setparam,
-	[DRM_RADEON_ALLOC] = compat_radeon_mem_alloc,
-	[DRM_RADEON_IRQ_EMIT] = compat_radeon_irq_emit,
-};
-
-/**
- * Called whenever a 32-bit process running under a 64-bit kernel
- * performs an ioctl on /dev/dri/card<n>.
- *
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument.
- * \return zero on success or negative number on failure.
- */
-long radeon_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
-	unsigned int nr = DRM_IOCTL_NR(cmd);
-	drm_ioctl_compat_t *fn = NULL;
-	int ret;
-
-	if (nr < DRM_COMMAND_BASE)
-		return drm_compat_ioctl(filp, cmd, arg);
-
-	if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(radeon_compat_ioctls))
-		fn = radeon_compat_ioctls[nr - DRM_COMMAND_BASE];
-
-	if (fn != NULL)
-		ret = (*fn) (filp, cmd, arg);
-	else
-		ret = drm_ioctl(filp, cmd, arg);
-
-	return ret;
-}
-
-long radeon_kms_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
-	unsigned int nr = DRM_IOCTL_NR(cmd);
-	int ret;
-
-	if (nr < DRM_COMMAND_BASE)
-		return drm_compat_ioctl(filp, cmd, arg);
-
-	ret = radeon_drm_ioctl(filp, cmd, arg);
-
-	return ret;
-}

include/drm/drm_ioctl.h

@@ -172,6 +172,7 @@ struct drm_ioctl_desc {
 
 int drm_ioctl_permit(u32 flags, struct drm_file *file_priv);
 long drm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
+long drm_ioctl_kernel(struct file *, drm_ioctl_t, void *, u32);
 #ifdef CONFIG_COMPAT
 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
 #else