drm_ioc32.c

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#include <linux/compat.h>
#include <linux/ratelimit.h>
#include <linux/export.h>

#include <drm/drmP.h>
#include <drm/drm_core.h>

#define DRM_IOCTL_VERSION32     DRM_IOWR(0x00, drm_version32_t)
#define DRM_IOCTL_GET_UNIQUE32      DRM_IOWR(0x01, drm_unique32_t)
#define DRM_IOCTL_GET_MAP32     DRM_IOWR(0x04, drm_map32_t)
#define DRM_IOCTL_GET_CLIENT32      DRM_IOWR(0x05, drm_client32_t)
#define DRM_IOCTL_GET_STATS32       DRM_IOR( 0x06, drm_stats32_t)

#define DRM_IOCTL_SET_UNIQUE32      DRM_IOW( 0x10, drm_unique32_t)
#define DRM_IOCTL_ADD_MAP32     DRM_IOWR(0x15, drm_map32_t)
#define DRM_IOCTL_ADD_BUFS32        DRM_IOWR(0x16, drm_buf_desc32_t)
#define DRM_IOCTL_MARK_BUFS32       DRM_IOW( 0x17, drm_buf_desc32_t)
#define DRM_IOCTL_INFO_BUFS32       DRM_IOWR(0x18, drm_buf_info32_t)
#define DRM_IOCTL_MAP_BUFS32        DRM_IOWR(0x19, drm_buf_map32_t)
#define DRM_IOCTL_FREE_BUFS32       DRM_IOW( 0x1a, drm_buf_free32_t)

#define DRM_IOCTL_RM_MAP32      DRM_IOW( 0x1b, drm_map32_t)

#define DRM_IOCTL_SET_SAREA_CTX32   DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
#define DRM_IOCTL_GET_SAREA_CTX32   DRM_IOWR(0x1d, drm_ctx_priv_map32_t)

#define DRM_IOCTL_RES_CTX32     DRM_IOWR(0x26, drm_ctx_res32_t)
#define DRM_IOCTL_DMA32         DRM_IOWR(0x29, drm_dma32_t)

#define DRM_IOCTL_AGP_ENABLE32      DRM_IOW( 0x32, drm_agp_mode32_t)
#define DRM_IOCTL_AGP_INFO32        DRM_IOR( 0x33, drm_agp_info32_t)
#define DRM_IOCTL_AGP_ALLOC32       DRM_IOWR(0x34, drm_agp_buffer32_t)
#define DRM_IOCTL_AGP_FREE32        DRM_IOW( 0x35, drm_agp_buffer32_t)
#define DRM_IOCTL_AGP_BIND32        DRM_IOW( 0x36, drm_agp_binding32_t)
#define DRM_IOCTL_AGP_UNBIND32      DRM_IOW( 0x37, drm_agp_binding32_t)

#define DRM_IOCTL_SG_ALLOC32        DRM_IOW( 0x38, drm_scatter_gather32_t)
#define DRM_IOCTL_SG_FREE32     DRM_IOW( 0x39, drm_scatter_gather32_t)

#define DRM_IOCTL_UPDATE_DRAW32     DRM_IOW( 0x3f, drm_update_draw32_t)

#define DRM_IOCTL_WAIT_VBLANK32     DRM_IOWR(0x3a, drm_wait_vblank32_t)

typedef struct drm_version_32 {
    int version_major;    
    int version_minor;    
    int version_patchlevel;    
    u32 name_len;         
    u32 name;         
    u32 date_len;         
    u32 date;         
    u32 desc_len;         
    u32 desc;         
} drm_version32_t;

static int compat_drm_version(struct file *file, unsigned int cmd,
                  unsigned long arg)
{
    drm_version32_t v32;
    struct drm_version __user *version;
    int err;

    if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
        return -EFAULT;

    version = compat_alloc_user_space(sizeof(*version));
    if (!access_ok(VERIFY_WRITE, version, sizeof(*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);
    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;

    if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
        return -EFAULT;
    return 0;
}

typedef struct drm_unique32 {
    u32 unique_len; 
    u32 unique; 
} drm_unique32_t;

static int compat_drm_getunique(struct file *file, unsigned int cmd,
                unsigned long arg)
{
    drm_unique32_t uq32;
    struct drm_unique __user *u;
    int err;

    if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
        return -EFAULT;

    u = compat_alloc_user_space(sizeof(*u));
    if (!access_ok(VERIFY_WRITE, u, sizeof(*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);
    if (err)
        return err;

    if (__get_user(uq32.unique_len, &u->unique_len))
        return -EFAULT;
    if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
        return -EFAULT;
    return 0;
}

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 (!access_ok(VERIFY_WRITE, u, sizeof(*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);
}

typedef struct drm_map32 {
    u32 offset;     
    u32 size;       
    enum drm_map_type type; 
    enum drm_map_flags flags;   
    u32 handle;     
    int mtrr;       
} drm_map32_t;

static int compat_drm_getmap(struct file *file, unsigned int cmd,
                 unsigned long arg)
{
    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;

    map = compat_alloc_user_space(sizeof(*map));
    if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
        return -EFAULT;
    if (__put_user(idx, &map->offset))
        return -EFAULT;

    err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map);
    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;
    if (copy_to_user(argp, &m32, sizeof(m32)))
        return -EFAULT;
    return 0;

}

static int compat_drm_addmap(struct file *file, unsigned int cmd,
                 unsigned long arg)
{
    drm_map32_t __user *argp = (void __user *)arg;
    drm_map32_t m32;
    struct drm_map __user *map;
    int err;
    void *handle;

    if (copy_from_user(&m32, argp, sizeof(m32)))
        return -EFAULT;

    map = compat_alloc_user_space(sizeof(*map));
    if (!access_ok(VERIFY_WRITE, map, sizeof(*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;

    err = drm_ioctl(file, DRM_IOCTL_ADD_MAP, (unsigned long)map);
    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)
        printk_ratelimited(KERN_ERR "compat_drm_addmap truncated handle"
                   " %p for type %d offset %x\n",
                   handle, m32.type, m32.offset);

    if (copy_to_user(argp, &m32, sizeof(m32)))
        return -EFAULT;

    return 0;
}

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;
    u32 handle;

    if (get_user(handle, &argp->handle))
        return -EFAULT;

    map = compat_alloc_user_space(sizeof(*map));
    if (!access_ok(VERIFY_WRITE, map, sizeof(*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);
}

typedef struct drm_client32 {
    int idx;    
    int auth;   
    u32 pid;    
    u32 uid;    
    u32 magic;  
    u32 iocs;   
} drm_client32_t;

static int compat_drm_getclient(struct file *file, unsigned int cmd,
                unsigned long arg)
{
    drm_client32_t c32;
    drm_client32_t __user *argp = (void __user *)arg;
    struct drm_client __user *client;
    int idx, err;

    if (get_user(idx, &argp->idx))
        return -EFAULT;

    client = compat_alloc_user_space(sizeof(*client));
    if (!access_ok(VERIFY_WRITE, client, sizeof(*client)))
        return -EFAULT;
    if (__put_user(idx, &client->idx))
        return -EFAULT;

    err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client);
    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;

    if (copy_to_user(argp, &c32, sizeof(c32)))
        return -EFAULT;
    return 0;
}

typedef struct drm_stats32 {
    u32 count;
    struct {
        u32 value;
        enum drm_stat_type type;
    } data[15];
} drm_stats32_t;

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;

    stats = compat_alloc_user_space(sizeof(*stats));
    if (!access_ok(VERIFY_WRITE, stats, sizeof(*stats)))
        return -EFAULT;

    err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats);
    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)))
        return -EFAULT;
    return 0;
}

typedef struct drm_buf_desc32 {
    int count;       
    int size;        
    int low_mark;        
    int high_mark;       
    int flags;
    u32 agp_start;       
} drm_buf_desc32_t;

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;
    int err;
    unsigned long agp_start;

    buf = compat_alloc_user_space(sizeof(*buf));
    if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf))
        || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
        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;

    err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
    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))
        return -EFAULT;

    return 0;
}

static int compat_drm_markbufs(struct file *file, unsigned int cmd,
                   unsigned long arg)
{
    drm_buf_desc32_t b32;
    drm_buf_desc32_t __user *argp = (void __user *)arg;
    struct drm_buf_desc __user *buf;

    if (copy_from_user(&b32, argp, sizeof(b32)))
        return -EFAULT;

    buf = compat_alloc_user_space(sizeof(*buf));
    if (!access_ok(VERIFY_WRITE, buf, sizeof(*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;

    return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
}

typedef struct drm_buf_info32 {
    int count;      
    u32 list;
} drm_buf_info32_t;

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;

    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 (!access_ok(VERIFY_WRITE, request, nbytes))
        return -EFAULT;
    list = (struct drm_buf_desc *) (request + 1);

    if (__put_user(count, &request->count)
        || __put_user(list, &request->list))
        return -EFAULT;

    err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request);
    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))
        return -EFAULT;

    return 0;
}

typedef struct drm_buf_pub32 {
    int idx;        
    int total;      
    int used;       
    u32 address;        
} drm_buf_pub32_t;

typedef struct drm_buf_map32 {
    int count;      
    u32 virtual;        
    u32 list;       
} drm_buf_map32_t;

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;

    if (copy_from_user(&req32, argp, sizeof(req32)))
        return -EFAULT;
    count = req32.count;
    list32 = (void __user *)(unsigned long)req32.list;

    if (count < 0)
        return -EINVAL;
    nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
    request = compat_alloc_user_space(nbytes);
    if (!access_ok(VERIFY_WRITE, request, nbytes))
        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);
    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))
        return -EFAULT;

    return 0;
}

typedef struct drm_buf_free32 {
    int count;
    u32 list;
} drm_buf_free32_t;

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;
    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 (!access_ok(VERIFY_WRITE, request, sizeof(*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);
}

typedef struct drm_ctx_priv_map32 {
    unsigned int ctx_id;     
    u32 handle;     
} drm_ctx_priv_map32_t;

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;
    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 (!access_ok(VERIFY_WRITE, request, sizeof(*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);
}

static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
                  unsigned long arg)
{
    struct drm_ctx_priv_map __user *request;
    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 (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
        return -EFAULT;
    if (__put_user(ctx_id, &request->ctx_id))
        return -EFAULT;

    err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
    if (err)
        return err;

    if (__get_user(handle, &request->handle)
        || __put_user((unsigned long)handle, &argp->handle))
        return -EFAULT;

    return 0;
}

typedef struct drm_ctx_res32 {
    int count;
    u32 contexts;
} drm_ctx_res32_t;

static int compat_drm_resctx(struct file *file, unsigned int cmd,
                 unsigned long arg)
{
    drm_ctx_res32_t __user *argp = (void __user *)arg;
    drm_ctx_res32_t res32;
    struct drm_ctx_res __user *res;
    int err;

    if (copy_from_user(&res32, argp, sizeof(res32)))
        return -EFAULT;

    res = compat_alloc_user_space(sizeof(*res));
    if (!access_ok(VERIFY_WRITE, res, sizeof(*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);
    if (err)
        return err;

    if (__get_user(res32.count, &res->count)
        || __put_user(res32.count, &argp->count))
        return -EFAULT;

    return 0;
}

typedef struct drm_dma32 {
    int context;          
    int send_count;       
    u32 send_indices;     
    u32 send_sizes;       
    enum drm_dma_flags flags;         
    int request_count;    
    int request_size;     
    u32 request_indices;      
    u32 request_sizes;
    int granted_count;    
} drm_dma32_t;

static int compat_drm_dma(struct file *file, unsigned int cmd,
              unsigned long arg)
{
    drm_dma32_t d32;
    drm_dma32_t __user *argp = (void __user *)arg;
    struct drm_dma __user *d;
    int err;

    if (copy_from_user(&d32, argp, sizeof(d32)))
        return -EFAULT;

    d = compat_alloc_user_space(sizeof(*d));
    if (!access_ok(VERIFY_WRITE, d, sizeof(*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);
    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))
        return -EFAULT;

    return 0;
}

#if __OS_HAS_AGP
typedef struct drm_agp_mode32 {
    u32 mode;   
} drm_agp_mode32_t;

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;

    mode = compat_alloc_user_space(sizeof(*mode));
    if (put_user(m32.mode, &mode->mode))
        return -EFAULT;

    return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
}

typedef struct drm_agp_info32 {
    int agp_version_major;
    int agp_version_minor;
    u32 mode;
    u32 aperture_base;  /* physical address */
    u32 aperture_size;  /* bytes */
    u32 memory_allowed; /* bytes */
    u32 memory_used;

    /* PCI information */
    unsigned short id_vendor;
    unsigned short id_device;
} drm_agp_info32_t;

static int compat_drm_agp_info(struct file *file, unsigned int cmd,
                   unsigned long arg)
{
    drm_agp_info32_t __user *argp = (void __user *)arg;
    drm_agp_info32_t i32;
    struct drm_agp_info __user *info;
    int err;

    info = compat_alloc_user_space(sizeof(*info));
    if (!access_ok(VERIFY_WRITE, info, sizeof(*info)))
        return -EFAULT;

    err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
    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;

    if (copy_to_user(argp, &i32, sizeof(i32)))
        return -EFAULT;

    return 0;
}

typedef struct drm_agp_buffer32 {
    u32 size;   
    u32 handle; 
    u32 type;   
    u32 physical;   
} drm_agp_buffer32_t;

static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
                unsigned long arg)
{
    drm_agp_buffer32_t __user *argp = (void __user *)arg;
    drm_agp_buffer32_t req32;
    struct drm_agp_buffer __user *request;
    int err;

    if (copy_from_user(&req32, argp, sizeof(req32)))
        return -EFAULT;

    request = compat_alloc_user_space(sizeof(*request));
    if (!access_ok(VERIFY_WRITE, request, sizeof(*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);
    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);
        return -EFAULT;
    }

    return 0;
}

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;

    request = compat_alloc_user_space(sizeof(*request));
    if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
        || get_user(handle, &argp->handle)
        || __put_user(handle, &request->handle))
        return -EFAULT;

    return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
}

typedef struct drm_agp_binding32 {
    u32 handle; 
    u32 offset; 
} drm_agp_binding32_t;

static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
                   unsigned long arg)
{
    drm_agp_binding32_t __user *argp = (void __user *)arg;
    drm_agp_binding32_t req32;
    struct drm_agp_binding __user *request;

    if (copy_from_user(&req32, argp, sizeof(req32)))
        return -EFAULT;

    request = compat_alloc_user_space(sizeof(*request));
    if (!access_ok(VERIFY_WRITE, request, sizeof(*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);
}

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;

    request = compat_alloc_user_space(sizeof(*request));
    if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
        || get_user(handle, &argp->handle)
        || __put_user(handle, &request->handle))
        return -EFAULT;

    return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
}
#endif              /* __OS_HAS_AGP */

typedef struct drm_scatter_gather32 {
    u32 size;   
    u32 handle; 
} drm_scatter_gather32_t;

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;
    int err;
    unsigned long x;

    request = compat_alloc_user_space(sizeof(*request));
    if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
        || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
        || __get_user(x, &argp->size)
        || __put_user(x, &request->size))
        return -EFAULT;

    err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request);
    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))
        return -EFAULT;

    return 0;
}

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;
    unsigned long x;

    request = compat_alloc_user_space(sizeof(*request));
    if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
        || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
        || __get_user(x, &argp->handle)
        || __put_user(x << PAGE_SHIFT, &request->handle))
        return -EFAULT;

    return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request);
}

#if defined(CONFIG_X86) || defined(CONFIG_IA64)
typedef struct drm_update_draw32 {
    drm_drawable_t handle;
    unsigned int type;
    unsigned int num;
    /* 64-bit version has a 32-bit pad here */
    u64 data;   
} __attribute__((packed)) drm_update_draw32_t;

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 (!access_ok(VERIFY_WRITE, request, sizeof(*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;
}
#endif

struct drm_wait_vblank_request32 {
    enum drm_vblank_seq_type type;
    unsigned int sequence;
    u32 signal;
};

struct drm_wait_vblank_reply32 {
    enum drm_vblank_seq_type type;
    unsigned int sequence;
    s32 tval_sec;
    s32 tval_usec;
};

typedef union drm_wait_vblank32 {
    struct drm_wait_vblank_request32 request;
    struct drm_wait_vblank_reply32 reply;
} drm_wait_vblank32_t;

static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
                  unsigned long arg)
{
    drm_wait_vblank32_t __user *argp = (void __user *)arg;
    drm_wait_vblank32_t req32;
    union drm_wait_vblank __user *request;
    int err;

    if (copy_from_user(&req32, argp, sizeof(req32)))
        return -EFAULT;

    request = compat_alloc_user_space(sizeof(*request));
    if (!access_ok(VERIFY_WRITE, request, sizeof(*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);
    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;

    if (copy_to_user(argp, &req32, sizeof(req32)))
        return -EFAULT;

    return 0;
}

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,
#if __OS_HAS_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,
#endif
    [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
    [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
#if defined(CONFIG_X86) || defined(CONFIG_IA64)
    [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
#endif
    [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
};

long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
    unsigned int nr = DRM_IOCTL_NR(cmd);
    drm_ioctl_compat_t *fn;
    int ret;

    /* Assume that ioctls without an explicit compat routine will just
     * work.  This may not always be a good assumption, but it's better
     * than always failing.
     */
    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);

    return ret;
}

EXPORT_SYMBOL(drm_compat_ioctl);