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/i915_ioc32.c b/drivers/char/drm/i915_ioc32.c
new file mode 100644
index 0000000..fe009e1
--- /dev/null
+++ b/drivers/char/drm/i915_ioc32.c
@@ -0,0 +1,221 @@
+/**
+ * \file i915_ioc32.c
+ *
+ * 32-bit ioctl compatibility routines for the i915 DRM.
+ *
+ * \author Alan Hourihane <alanh@fairlite.demon.co.uk>
+ *
+ *
+ * Copyright (C) Paul Mackerras 2005
+ * Copyright (C) Alan Hourihane 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 "i915_drm.h"
+
+typedef struct _drm_i915_batchbuffer32 {
+ int start; /* agp offset */
+ int used; /* nr bytes in use */
+ int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */
+ int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */
+ int num_cliprects; /* mulitpass with multiple cliprects? */
+ u32 cliprects; /* pointer to userspace cliprects */
+} drm_i915_batchbuffer32_t;
+
+static int compat_i915_batchbuffer(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_i915_batchbuffer32_t batchbuffer32;
+ drm_i915_batchbuffer_t __user *batchbuffer;
+
+ if (copy_from_user(&batchbuffer32, (void __user *)arg, sizeof(batchbuffer32)))
+ return -EFAULT;
+
+ batchbuffer = compat_alloc_user_space(sizeof(*batchbuffer));
+ if (!access_ok(VERIFY_WRITE, batchbuffer, sizeof(*batchbuffer))
+ || __put_user(batchbuffer32.start, &batchbuffer->start)
+ || __put_user(batchbuffer32.used, &batchbuffer->used)
+ || __put_user(batchbuffer32.DR1, &batchbuffer->DR1)
+ || __put_user(batchbuffer32.DR4, &batchbuffer->DR4)
+ || __put_user(batchbuffer32.num_cliprects, &batchbuffer->num_cliprects)
+ || __put_user((int __user *)(unsigned long)batchbuffer32.cliprects,
+ &batchbuffer->cliprects))
+ return -EFAULT;
+
+ return drm_ioctl(file->f_dentry->d_inode, file,
+ DRM_IOCTL_I915_BATCHBUFFER, (unsigned long) batchbuffer);
+}
+
+typedef struct _drm_i915_cmdbuffer32 {
+ u32 buf; /* pointer to userspace command buffer */
+ int sz; /* nr bytes in buf */
+ int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */
+ int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */
+ int num_cliprects; /* mulitpass with multiple cliprects? */
+ u32 cliprects; /* pointer to userspace cliprects */
+} drm_i915_cmdbuffer32_t;
+
+static int compat_i915_cmdbuffer(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_i915_cmdbuffer32_t cmdbuffer32;
+ drm_i915_cmdbuffer_t __user *cmdbuffer;
+
+ if (copy_from_user(&cmdbuffer32, (void __user *)arg, sizeof(cmdbuffer32)))
+ return -EFAULT;
+
+ cmdbuffer = compat_alloc_user_space(sizeof(*cmdbuffer));
+ if (!access_ok(VERIFY_WRITE, cmdbuffer, sizeof(*cmdbuffer))
+ || __put_user((int __user *)(unsigned long)cmdbuffer32.buf,
+ &cmdbuffer->buf)
+ || __put_user(cmdbuffer32.sz, &cmdbuffer->sz)
+ || __put_user(cmdbuffer32.DR1, &cmdbuffer->DR1)
+ || __put_user(cmdbuffer32.DR4, &cmdbuffer->DR4)
+ || __put_user(cmdbuffer32.num_cliprects, &cmdbuffer->num_cliprects)
+ || __put_user((int __user *)(unsigned long)cmdbuffer32.cliprects,
+ &cmdbuffer->cliprects))
+ return -EFAULT;
+
+ return drm_ioctl(file->f_dentry->d_inode, file,
+ DRM_IOCTL_I915_CMDBUFFER, (unsigned long) cmdbuffer);
+}
+
+typedef struct drm_i915_irq_emit32 {
+ u32 irq_seq;
+} drm_i915_irq_emit32_t;
+
+static int compat_i915_irq_emit(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_i915_irq_emit32_t req32;
+ drm_i915_irq_emit_t __user *request;
+
+ if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
+ return -EFAULT;
+
+ request = compat_alloc_user_space(sizeof(*request));
+ if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
+ || __put_user((int __user *)(unsigned long)req32.irq_seq,
+ &request->irq_seq))
+ return -EFAULT;
+
+ return drm_ioctl(file->f_dentry->d_inode, file,
+ DRM_IOCTL_I915_IRQ_EMIT, (unsigned long) request);
+}
+typedef struct drm_i915_getparam32 {
+ int param;
+ u32 value;
+} drm_i915_getparam32_t;
+
+static int compat_i915_getparam(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_i915_getparam32_t req32;
+ drm_i915_getparam_t __user *request;
+
+ if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
+ return -EFAULT;
+
+ request = compat_alloc_user_space(sizeof(*request));
+ if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
+ || __put_user(req32.param, &request->param)
+ || __put_user((void __user *)(unsigned long)req32.value,
+ &request->value))
+ return -EFAULT;
+
+ return drm_ioctl(file->f_dentry->d_inode, file,
+ DRM_IOCTL_I915_GETPARAM, (unsigned long) request);
+}
+
+typedef struct drm_i915_mem_alloc32 {
+ int region;
+ int alignment;
+ int size;
+ u32 region_offset; /* offset from start of fb or agp */
+} drm_i915_mem_alloc32_t;
+
+static int compat_i915_alloc(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_i915_mem_alloc32_t req32;
+ drm_i915_mem_alloc_t __user *request;
+
+ if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
+ return -EFAULT;
+
+ request = compat_alloc_user_space(sizeof(*request));
+ if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
+ || __put_user(req32.region, &request->region)
+ || __put_user(req32.alignment, &request->alignment)
+ || __put_user(req32.size, &request->size)
+ || __put_user((void __user *)(unsigned long)req32.region_offset,
+ &request->region_offset))
+ return -EFAULT;
+
+ return drm_ioctl(file->f_dentry->d_inode, file,
+ DRM_IOCTL_I915_ALLOC, (unsigned long) request);
+}
+
+
+drm_ioctl_compat_t *i915_compat_ioctls[] = {
+ [DRM_I915_BATCHBUFFER] = compat_i915_batchbuffer,
+ [DRM_I915_CMDBUFFER] = compat_i915_cmdbuffer,
+ [DRM_I915_GETPARAM] = compat_i915_getparam,
+ [DRM_I915_IRQ_EMIT] = compat_i915_irq_emit,
+ [DRM_I915_ALLOC] = compat_i915_alloc
+};
+
+/**
+ * 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 i915_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(i915_compat_ioctls))
+ fn = i915_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;
+}