drm: add 32/64 support for MGA/R128/i915
This adds compatiblity ioctls for mga/r128 and i915 DRM drivers.
From: Paul Mackerras, David Airlie, Alan Hourihane, Egbert Eich.
Signed-off-by: David Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/mga_ioc32.c b/drivers/char/drm/mga_ioc32.c
new file mode 100644
index 0000000..bc745cf
--- /dev/null
+++ b/drivers/char/drm/mga_ioc32.c
@@ -0,0 +1,167 @@
+/**
+ * \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 <linux/ioctl32.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_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_dentry->d_inode, file,
+ DRM_IOCTL_MGA_GETPARAM, (unsigned long)getparam);
+}
+
+drm_ioctl_compat_t *mga_compat_ioctls[] = {
+ [DRM_MGA_INIT] = compat_mga_init,
+ [DRM_MGA_GETPARAM] = compat_mga_getparam,
+};
+
+/**
+ * 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_dentry->d_inode, filp, cmd, arg);
+ unlock_kernel();
+
+ return ret;
+}