1 files changed, 231 insertions, 0 deletions

diff --git a/drivers/gpu/drm/mga/mga_ioc32.c b/drivers/gpu/drm/mga/mga_ioc32.c
new file mode 100644
index 000000000000..30d00478ddee
--- /dev/null
+++ b/drivers/gpu/drm/mga/mga_ioc32.c
@@ -0,0 +1,231 @@
+/**
+ * \file mga_ioc32.c
+ *
+ * 32-bit ioctl compatibility routines for the MGA DRM.
+ *
+ * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
+ *
+ *
+ * Copyright (C) Paul Mackerras 2005
+ * Copyright (C) Egbert Eich 2003,2004
+ * Copyright (C) Dave Airlie 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 "drmP.h"
+#include "drm.h"
+#include "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->f_path.dentry->d_inode, 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->f_path.dentry->d_inode, 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->f_path.dentry->d_inode, 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,
+};
+
+/**
+ * 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 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];
+
+        lock_kernel();          /* XXX for now */
+        if (fn != NULL)
+                ret = (*fn) (filp, cmd, arg);
+        else
+                ret = drm_ioctl(filp->f_path.dentry->d_inode, filp, cmd, arg);
+        unlock_kernel();
+
+        return ret;
+}