1 files changed, 395 insertions, 0 deletions

diff --git a/drivers/char/drm/radeon_ioc32.c b/drivers/char/drm/radeon_ioc32.c
new file mode 100644
index 000000000000..bfe612215fb3
--- /dev/null
+++ b/drivers/char/drm/radeon_ioc32.c
@@ -0,0 +1,395 @@
+/**
+ * \file radeon_ioc32.c
+ *
+ * 32-bit ioctl compatibility routines for the Radeon DRM.
+ *
+ * \author Paul Mackerras <paulus@samba.org>
+ *
+ * Copyright (C) Paul Mackerras 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 "radeon_drm.h"
+#include "radeon_drv.h"
+
+typedef struct drm_radeon_init32 {
+        int func;
+        u32 sarea_priv_offset;
+        int is_pci;
+        int cp_mode;
+        int gart_size;
+        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;
+
+        u32 fb_offset;
+        u32 mmio_offset;
+        u32 ring_offset;
+        u32 ring_rptr_offset;
+        u32 buffers_offset;
+        u32 gart_textures_offset;
+} drm_radeon_init32_t;
+
+static int compat_radeon_cp_init(struct file *file, unsigned int cmd,
+                                 unsigned long arg)
+{
+        drm_radeon_init32_t init32;
+        drm_radeon_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.cp_mode, &init->cp_mode)
+            || __put_user(init32.gart_size, &init->gart_size)
+            || __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.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.gart_textures_offset,
+                          &init->gart_textures_offset))
+                return -EFAULT;
+
+        return drm_ioctl(file->f_dentry->d_inode, file,
+                         DRM_IOCTL_RADEON_CP_INIT, (unsigned long) init);
+}
+
+typedef struct drm_radeon_clear32 {
+        unsigned int flags;
+        unsigned int clear_color;
+        unsigned int clear_depth;
+        unsigned int color_mask;
+        unsigned int depth_mask;   /* misnamed field:  should be stencil */
+        u32          depth_boxes;
+} drm_radeon_clear32_t;
+
+static int compat_radeon_cp_clear(struct file *file, unsigned int cmd,
+                                  unsigned long arg)
+{
+        drm_radeon_clear32_t clr32;
+        drm_radeon_clear_t __user *clr;
+
+        if (copy_from_user(&clr32, (void __user *)arg, sizeof(clr32)))
+                return -EFAULT;
+
+        clr = compat_alloc_user_space(sizeof(*clr));
+        if (!access_ok(VERIFY_WRITE, clr, sizeof(*clr))
+            || __put_user(clr32.flags, &clr->flags)
+            || __put_user(clr32.clear_color, &clr->clear_color)
+            || __put_user(clr32.clear_depth, &clr->clear_depth)
+            || __put_user(clr32.color_mask, &clr->color_mask)
+            || __put_user(clr32.depth_mask, &clr->depth_mask)
+            || __put_user((void __user *)(unsigned long)clr32.depth_boxes,
+                          &clr->depth_boxes))
+                return -EFAULT;
+
+        return drm_ioctl(file->f_dentry->d_inode, file,
+                         DRM_IOCTL_RADEON_CLEAR, (unsigned long) clr);
+}
+
+typedef struct drm_radeon_stipple32 {
+        u32 mask;
+} drm_radeon_stipple32_t;
+
+static int compat_radeon_cp_stipple(struct file *file, unsigned int cmd,
+                                    unsigned long arg)
+{
+        drm_radeon_stipple32_t __user *argp = (void __user *) arg;
+        drm_radeon_stipple_t __user *request;
+        u32 mask;
+
+        if (get_user(mask, &argp->mask))
+                return -EFAULT;
+
+        request = compat_alloc_user_space(sizeof(*request));
+        if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
+            || __put_user((unsigned int __user *)(unsigned long) mask,
+                          &request->mask))
+                return -EFAULT;
+
+        return drm_ioctl(file->f_dentry->d_inode, file,
+                         DRM_IOCTL_RADEON_STIPPLE, (unsigned long) request);
+}
+
+typedef struct drm_radeon_tex_image32 {
+        unsigned int x, y;              /* Blit coordinates */
+        unsigned int width, height;
+        u32 data;
+} drm_radeon_tex_image32_t;
+
+typedef struct drm_radeon_texture32 {
+        unsigned int offset;
+        int pitch;
+        int format;
+        int width;                      /* Texture image coordinates */
+        int height;
+        u32 image;
+} drm_radeon_texture32_t;
+
+static int compat_radeon_cp_texture(struct file *file, unsigned int cmd,
+                                    unsigned long arg)
+{
+        drm_radeon_texture32_t req32;
+        drm_radeon_texture_t __user *request;
+        drm_radeon_tex_image32_t img32;
+        drm_radeon_tex_image_t __user *image;
+
+        if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
+                return -EFAULT;
+        if (req32.image == 0)
+                return -EINVAL;
+        if (copy_from_user(&img32, (void __user *)(unsigned long)req32.image,
+                           sizeof(img32)))
+                return -EFAULT;
+
+        request = compat_alloc_user_space(sizeof(*request) + sizeof(*image));
+        if (!access_ok(VERIFY_WRITE, request,
+                       sizeof(*request) + sizeof(*image)))
+                return -EFAULT;
+        image = (drm_radeon_tex_image_t __user *) (request + 1);
+
+        if (__put_user(req32.offset, &request->offset)
+            || __put_user(req32.pitch, &request->pitch)
+            || __put_user(req32.format, &request->format)
+            || __put_user(req32.width, &request->width)
+            || __put_user(req32.height, &request->height)
+            || __put_user(image, &request->image)
+            || __put_user(img32.x, &image->x)
+            || __put_user(img32.y, &image->y)
+            || __put_user(img32.width, &image->width)
+            || __put_user(img32.height, &image->height)
+            || __put_user((const void __user *)(unsigned long)img32.data,
+                          &image->data))
+                return -EFAULT;
+
+        return drm_ioctl(file->f_dentry->d_inode, file,
+                         DRM_IOCTL_RADEON_TEXTURE, (unsigned long) request);
+}
+
+typedef struct drm_radeon_vertex2_32 {
+        int idx;                        /* Index of vertex buffer */
+        int discard;                    /* Client finished with buffer? */
+        int nr_states;
+        u32 state;
+        int nr_prims;
+        u32 prim;
+} drm_radeon_vertex2_32_t;
+
+static int compat_radeon_cp_vertex2(struct file *file, unsigned int cmd,
+                                    unsigned long arg)
+{
+        drm_radeon_vertex2_32_t req32;
+        drm_radeon_vertex2_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.idx, &request->idx)
+            || __put_user(req32.discard, &request->discard)
+            || __put_user(req32.nr_states, &request->nr_states)
+            || __put_user((void __user *)(unsigned long)req32.state,
+                          &request->state)
+            || __put_user(req32.nr_prims, &request->nr_prims)
+            || __put_user((void __user *)(unsigned long)req32.prim,
+                          &request->prim))
+                return -EFAULT;
+
+        return drm_ioctl(file->f_dentry->d_inode, file,
+                         DRM_IOCTL_RADEON_VERTEX2, (unsigned long) request);
+}
+
+typedef struct drm_radeon_cmd_buffer32 {
+        int bufsz;
+        u32 buf;
+        int nbox;
+        u32 boxes;
+} drm_radeon_cmd_buffer32_t;
+
+static int compat_radeon_cp_cmdbuf(struct file *file, unsigned int cmd,
+                                   unsigned long arg)
+{
+        drm_radeon_cmd_buffer32_t req32;
+        drm_radeon_cmd_buffer_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.bufsz, &request->bufsz)
+            || __put_user((void __user *)(unsigned long)req32.buf,
+                          &request->buf)
+            || __put_user(req32.nbox, &request->nbox)
+            || __put_user((void __user *)(unsigned long)req32.boxes,
+                          &request->boxes))
+                return -EFAULT;
+
+        return drm_ioctl(file->f_dentry->d_inode, file,
+                         DRM_IOCTL_RADEON_CMDBUF, (unsigned long) request);
+}
+
+typedef struct drm_radeon_getparam32 {
+        int param;
+        u32 value;
+} drm_radeon_getparam32_t;
+
+static int compat_radeon_cp_getparam(struct file *file, unsigned int cmd,
+                                     unsigned long arg)
+{
+        drm_radeon_getparam32_t req32;
+        drm_radeon_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_RADEON_GETPARAM, (unsigned long) request);
+}
+
+typedef struct drm_radeon_mem_alloc32 {
+        int region;
+        int alignment;
+        int size;
+        u32 region_offset;      /* offset from start of fb or GART */
+} drm_radeon_mem_alloc32_t;
+
+static int compat_radeon_mem_alloc(struct file *file, unsigned int cmd,
+                                   unsigned long arg)
+{
+        drm_radeon_mem_alloc32_t req32;
+        drm_radeon_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((int __user *)(unsigned long)req32.region_offset,
+                          &request->region_offset))
+                return -EFAULT;
+
+        return drm_ioctl(file->f_dentry->d_inode, file,
+                         DRM_IOCTL_RADEON_ALLOC, (unsigned long) request);
+}
+
+typedef struct drm_radeon_irq_emit32 {
+        u32 irq_seq;
+} drm_radeon_irq_emit32_t;
+
+static int compat_radeon_irq_emit(struct file *file, unsigned int cmd,
+                                  unsigned long arg)
+{
+        drm_radeon_irq_emit32_t req32;
+        drm_radeon_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_RADEON_IRQ_EMIT, (unsigned long) request);
+}
+
+drm_ioctl_compat_t *radeon_compat_ioctls[] = {
+        [DRM_RADEON_CP_INIT] = compat_radeon_cp_init,
+        [DRM_RADEON_CLEAR] = compat_radeon_cp_clear,
+        [DRM_RADEON_STIPPLE] = compat_radeon_cp_stipple,
+        [DRM_RADEON_TEXTURE] = compat_radeon_cp_texture,
+        [DRM_RADEON_VERTEX2] = compat_radeon_cp_vertex2,
+        [DRM_RADEON_CMDBUF] = compat_radeon_cp_cmdbuf,
+        [DRM_RADEON_GETPARAM] = compat_radeon_cp_getparam,
+        [DRM_RADEON_ALLOC] = compat_radeon_mem_alloc,
+        [DRM_RADEON_IRQ_EMIT] = compat_radeon_irq_emit,
+};
+
+/**
+ * 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 radeon_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(radeon_compat_ioctls))
+                fn = radeon_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;
+}