mga_ioc32.c

Go to the documentation of this file.

#include <linux/compat.h>

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

typedef struct drm32_mga_init {
    int func;
    u32 sarea_priv_offset;
    int chipset;
    int sgram;
    unsigned int maccess;
    unsigned int fb_cpp;
    unsigned int front_offset, front_pitch;
    unsigned int back_offset, back_pitch;
    unsigned int depth_cpp;
    unsigned int depth_offset, depth_pitch;
    unsigned int texture_offset[MGA_NR_TEX_HEAPS];
    unsigned int texture_size[MGA_NR_TEX_HEAPS];
    u32 fb_offset;
    u32 mmio_offset;
    u32 status_offset;
    u32 warp_offset;
    u32 primary_offset;
    u32 buffers_offset;
} drm_mga_init32_t;

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;

    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);
}

typedef struct drm_mga_getparam32 {
    int param;
    u32 value;
} drm_mga_getparam32_t;

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;

    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);
}

typedef struct drm_mga_drm_bootstrap32 {
    u32 texture_handle;
    u32 texture_size;
    u32 primary_size;
    u32 secondary_bin_count;
    u32 secondary_bin_size;
    u32 agp_mode;
    u8 agp_size;
} drm_mga_dma_bootstrap32_t;

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;
    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;

    err = drm_ioctl(file, DRM_IOCTL_MGA_DMA_BOOTSTRAP,
            (unsigned long)dma_bootstrap);
    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;

    if (copy_to_user((void __user *)arg, &dma_bootstrap32,
             sizeof(dma_bootstrap32)))
        return -EFAULT;

    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,
};

long mga_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(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);

    return ret;
}