r128_ioc32.c

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#include <linux/compat.h>

#include <drm/drmP.h>
#include <drm/r128_drm.h>

typedef struct drm_r128_init32 {
    int func;
    unsigned int sarea_priv_offset;
    int is_pci;
    int cce_mode;
    int cce_secure;
    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;
    unsigned int span_offset;

    unsigned int fb_offset;
    unsigned int mmio_offset;
    unsigned int ring_offset;
    unsigned int ring_rptr_offset;
    unsigned int buffers_offset;
    unsigned int agp_textures_offset;
} drm_r128_init32_t;

static int compat_r128_init(struct file *file, unsigned int cmd,
                unsigned long arg)
{
    drm_r128_init32_t init32;
    drm_r128_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.cce_mode, &init->cce_mode)
        || __put_user(init32.cce_secure, &init->cce_secure)
        || __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.span_offset, &init->span_offset)
        || __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.agp_textures_offset,
              &init->agp_textures_offset))
        return -EFAULT;

    return drm_ioctl(file, DRM_IOCTL_R128_INIT, (unsigned long)init);
}

typedef struct drm_r128_depth32 {
    int func;
    int n;
    u32 x;
    u32 y;
    u32 buffer;
    u32 mask;
} drm_r128_depth32_t;

static int compat_r128_depth(struct file *file, unsigned int cmd,
                 unsigned long arg)
{
    drm_r128_depth32_t depth32;
    drm_r128_depth_t __user *depth;

    if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
        return -EFAULT;

    depth = compat_alloc_user_space(sizeof(*depth));
    if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth))
        || __put_user(depth32.func, &depth->func)
        || __put_user(depth32.n, &depth->n)
        || __put_user((int __user *)(unsigned long)depth32.x, &depth->x)
        || __put_user((int __user *)(unsigned long)depth32.y, &depth->y)
        || __put_user((unsigned int __user *)(unsigned long)depth32.buffer,
              &depth->buffer)
        || __put_user((unsigned char __user *)(unsigned long)depth32.mask,
              &depth->mask))
        return -EFAULT;

    return drm_ioctl(file, DRM_IOCTL_R128_DEPTH, (unsigned long)depth);

}

typedef struct drm_r128_stipple32 {
    u32 mask;
} drm_r128_stipple32_t;

static int compat_r128_stipple(struct file *file, unsigned int cmd,
                   unsigned long arg)
{
    drm_r128_stipple32_t stipple32;
    drm_r128_stipple_t __user *stipple;

    if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
        return -EFAULT;

    stipple = compat_alloc_user_space(sizeof(*stipple));
    if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple))
        || __put_user((unsigned int __user *)(unsigned long)stipple32.mask,
              &stipple->mask))
        return -EFAULT;

    return drm_ioctl(file, DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple);
}

typedef struct drm_r128_getparam32 {
    int param;
    u32 value;
} drm_r128_getparam32_t;

static int compat_r128_getparam(struct file *file, unsigned int cmd,
                unsigned long arg)
{
    drm_r128_getparam32_t getparam32;
    drm_r128_getparam_t __user *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_R128_GETPARAM, (unsigned long)getparam);
}

drm_ioctl_compat_t *r128_compat_ioctls[] = {
    [DRM_R128_INIT] = compat_r128_init,
    [DRM_R128_DEPTH] = compat_r128_depth,
    [DRM_R128_STIPPLE] = compat_r128_stipple,
    [DRM_R128_GETPARAM] = compat_r128_getparam,
};

long r128_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 + DRM_ARRAY_SIZE(r128_compat_ioctls))
        fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];

    if (fn != NULL)
        ret = (*fn) (filp, cmd, arg);
    else
        ret = drm_ioctl(filp, cmd, arg);

    return ret;
}