v4.19.13 snapshot.
diff --git a/drivers/gpu/drm/drm_ioc32.c b/drivers/gpu/drm/drm_ioc32.c
new file mode 100644
index 0000000..67b1fca
--- /dev/null
+++ b/drivers/gpu/drm/drm_ioc32.c
@@ -0,0 +1,982 @@
+/*
+ * \file drm_ioc32.c
+ *
+ * 32-bit ioctl compatibility routines for the 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/ratelimit.h>
+#include <linux/export.h>
+
+#include <drm/drmP.h>
+#include "drm_legacy.h"
+#include "drm_internal.h"
+#include "drm_crtc_internal.h"
+
+#define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
+#define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
+#define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t)
+#define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t)
+#define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t)
+
+#define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t)
+#define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t)
+#define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t)
+#define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t)
+#define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t)
+#define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t)
+#define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t)
+
+#define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
+
+#define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
+#define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
+
+#define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
+#define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
+
+#define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t)
+#define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t)
+#define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t)
+#define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t)
+#define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t)
+#define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t)
+
+#define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
+#define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
+
+#define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
+
+#define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
+
+#define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
+
+typedef struct drm_version_32 {
+ int version_major; /* Major version */
+ int version_minor; /* Minor version */
+ int version_patchlevel; /* Patch level */
+ u32 name_len; /* Length of name buffer */
+ u32 name; /* Name of driver */
+ u32 date_len; /* Length of date buffer */
+ u32 date; /* User-space buffer to hold date */
+ u32 desc_len; /* Length of desc buffer */
+ u32 desc; /* User-space buffer to hold desc */
+} drm_version32_t;
+
+static int compat_drm_version(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_version32_t v32;
+ struct drm_version v;
+ int err;
+
+ if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
+ return -EFAULT;
+
+ v = (struct drm_version) {
+ .name_len = v32.name_len,
+ .name = compat_ptr(v32.name),
+ .date_len = v32.date_len,
+ .date = compat_ptr(v32.date),
+ .desc_len = v32.desc_len,
+ .desc = compat_ptr(v32.desc),
+ };
+ err = drm_ioctl_kernel(file, drm_version, &v,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW);
+ if (err)
+ return err;
+
+ v32.version_major = v.version_major;
+ v32.version_minor = v.version_minor;
+ v32.version_patchlevel = v.version_patchlevel;
+ v32.name_len = v.name_len;
+ v32.date_len = v.date_len;
+ v32.desc_len = v.desc_len;
+ if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
+ return -EFAULT;
+ return 0;
+}
+
+typedef struct drm_unique32 {
+ u32 unique_len; /* Length of unique */
+ u32 unique; /* Unique name for driver instantiation */
+} drm_unique32_t;
+
+static int compat_drm_getunique(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_unique32_t uq32;
+ struct drm_unique uq;
+ int err;
+
+ if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
+ return -EFAULT;
+ uq = (struct drm_unique){
+ .unique_len = uq32.unique_len,
+ .unique = compat_ptr(uq32.unique),
+ };
+
+ err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED);
+ if (err)
+ return err;
+
+ uq32.unique_len = uq.unique_len;
+ if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
+ return -EFAULT;
+ return 0;
+}
+
+static int compat_drm_setunique(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ /* it's dead */
+ return -EINVAL;
+}
+
+typedef struct drm_map32 {
+ u32 offset; /* Requested physical address (0 for SAREA) */
+ u32 size; /* Requested physical size (bytes) */
+ enum drm_map_type type; /* Type of memory to map */
+ enum drm_map_flags flags; /* Flags */
+ u32 handle; /* User-space: "Handle" to pass to mmap() */
+ int mtrr; /* MTRR slot used */
+} drm_map32_t;
+
+static int compat_drm_getmap(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_map32_t __user *argp = (void __user *)arg;
+ drm_map32_t m32;
+ struct drm_map map;
+ int err;
+
+ if (copy_from_user(&m32, argp, sizeof(m32)))
+ return -EFAULT;
+
+ map.offset = m32.offset;
+ err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
+ if (err)
+ return err;
+
+ m32.offset = map.offset;
+ m32.size = map.size;
+ m32.type = map.type;
+ m32.flags = map.flags;
+ m32.handle = ptr_to_compat(map.handle);
+ m32.mtrr = map.mtrr;
+ if (copy_to_user(argp, &m32, sizeof(m32)))
+ return -EFAULT;
+ return 0;
+
+}
+
+static int compat_drm_addmap(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_map32_t __user *argp = (void __user *)arg;
+ drm_map32_t m32;
+ struct drm_map map;
+ int err;
+
+ if (copy_from_user(&m32, argp, sizeof(m32)))
+ return -EFAULT;
+
+ map.offset = m32.offset;
+ map.size = m32.size;
+ map.type = m32.type;
+ map.flags = m32.flags;
+
+ err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+ if (err)
+ return err;
+
+ m32.offset = map.offset;
+ m32.mtrr = map.mtrr;
+ m32.handle = ptr_to_compat(map.handle);
+ if (map.handle != compat_ptr(m32.handle))
+ pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
+ map.handle, m32.type, m32.offset);
+
+ if (copy_to_user(argp, &m32, sizeof(m32)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int compat_drm_rmmap(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_map32_t __user *argp = (void __user *)arg;
+ struct drm_map map;
+ u32 handle;
+
+ if (get_user(handle, &argp->handle))
+ return -EFAULT;
+ map.handle = compat_ptr(handle);
+ return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
+}
+
+typedef struct drm_client32 {
+ int idx; /* Which client desired? */
+ int auth; /* Is client authenticated? */
+ u32 pid; /* Process ID */
+ u32 uid; /* User ID */
+ u32 magic; /* Magic */
+ u32 iocs; /* Ioctl count */
+} drm_client32_t;
+
+static int compat_drm_getclient(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_client32_t c32;
+ drm_client32_t __user *argp = (void __user *)arg;
+ struct drm_client client;
+ int err;
+
+ if (copy_from_user(&c32, argp, sizeof(c32)))
+ return -EFAULT;
+
+ client.idx = c32.idx;
+
+ err = drm_ioctl_kernel(file, drm_getclient, &client, DRM_UNLOCKED);
+ if (err)
+ return err;
+
+ c32.idx = client.idx;
+ c32.auth = client.auth;
+ c32.pid = client.pid;
+ c32.uid = client.uid;
+ c32.magic = client.magic;
+ c32.iocs = client.iocs;
+
+ if (copy_to_user(argp, &c32, sizeof(c32)))
+ return -EFAULT;
+ return 0;
+}
+
+typedef struct drm_stats32 {
+ u32 count;
+ struct {
+ u32 value;
+ enum drm_stat_type type;
+ } data[15];
+} drm_stats32_t;
+
+static int compat_drm_getstats(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_stats32_t __user *argp = (void __user *)arg;
+ int err;
+
+ err = drm_ioctl_kernel(file, drm_noop, NULL, DRM_UNLOCKED);
+ if (err)
+ return err;
+
+ if (clear_user(argp, sizeof(drm_stats32_t)))
+ return -EFAULT;
+ return 0;
+}
+
+typedef struct drm_buf_desc32 {
+ int count; /* Number of buffers of this size */
+ int size; /* Size in bytes */
+ int low_mark; /* Low water mark */
+ int high_mark; /* High water mark */
+ int flags;
+ u32 agp_start; /* Start address in the AGP aperture */
+} drm_buf_desc32_t;
+
+static int compat_drm_addbufs(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_buf_desc32_t __user *argp = (void __user *)arg;
+ drm_buf_desc32_t desc32;
+ struct drm_buf_desc desc;
+ int err;
+
+ if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
+ return -EFAULT;
+
+ desc = (struct drm_buf_desc){
+ desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
+ desc32.flags, desc32.agp_start
+ };
+
+ err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+ if (err)
+ return err;
+
+ desc32 = (drm_buf_desc32_t){
+ desc.count, desc.size, desc.low_mark, desc.high_mark,
+ desc.flags, desc.agp_start
+ };
+ if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int compat_drm_markbufs(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_buf_desc32_t b32;
+ drm_buf_desc32_t __user *argp = (void __user *)arg;
+ struct drm_buf_desc buf;
+
+ if (copy_from_user(&b32, argp, sizeof(b32)))
+ return -EFAULT;
+
+ buf.size = b32.size;
+ buf.low_mark = b32.low_mark;
+ buf.high_mark = b32.high_mark;
+
+ return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+}
+
+typedef struct drm_buf_info32 {
+ int count; /**< Entries in list */
+ u32 list;
+} drm_buf_info32_t;
+
+static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
+{
+ drm_buf_info32_t *request = data;
+ drm_buf_desc32_t __user *to = compat_ptr(request->list);
+ drm_buf_desc32_t v = {.count = from->buf_count,
+ .size = from->buf_size,
+ .low_mark = from->low_mark,
+ .high_mark = from->high_mark};
+ return copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags));
+}
+
+static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ drm_buf_info32_t *request = data;
+ return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
+}
+
+static int compat_drm_infobufs(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_buf_info32_t req32;
+ drm_buf_info32_t __user *argp = (void __user *)arg;
+ int err;
+
+ if (copy_from_user(&req32, argp, sizeof(req32)))
+ return -EFAULT;
+
+ if (req32.count < 0)
+ req32.count = 0;
+
+ err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
+ if (err)
+ return err;
+
+ if (put_user(req32.count, &argp->count))
+ return -EFAULT;
+
+ return 0;
+}
+
+typedef struct drm_buf_pub32 {
+ int idx; /**< Index into the master buffer list */
+ int total; /**< Buffer size */
+ int used; /**< Amount of buffer in use (for DMA) */
+ u32 address; /**< Address of buffer */
+} drm_buf_pub32_t;
+
+typedef struct drm_buf_map32 {
+ int count; /**< Length of the buffer list */
+ u32 virtual; /**< Mmap'd area in user-virtual */
+ u32 list; /**< Buffer information */
+} drm_buf_map32_t;
+
+static int map_one_buf32(void *data, int idx, unsigned long virtual,
+ struct drm_buf *buf)
+{
+ drm_buf_map32_t *request = data;
+ drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx;
+ drm_buf_pub32_t v;
+
+ v.idx = buf->idx;
+ v.total = buf->total;
+ v.used = 0;
+ v.address = virtual + buf->offset;
+ if (copy_to_user(to, &v, sizeof(v)))
+ return -EFAULT;
+ return 0;
+}
+
+static int drm_legacy_mapbufs32(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ drm_buf_map32_t *request = data;
+ void __user *v;
+ int err = __drm_legacy_mapbufs(dev, data, &request->count,
+ &v, map_one_buf32,
+ file_priv);
+ request->virtual = ptr_to_compat(v);
+ return err;
+}
+
+static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_buf_map32_t __user *argp = (void __user *)arg;
+ drm_buf_map32_t req32;
+ int err;
+
+ if (copy_from_user(&req32, argp, sizeof(req32)))
+ return -EFAULT;
+ if (req32.count < 0)
+ return -EINVAL;
+
+ err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
+ if (err)
+ return err;
+
+ if (put_user(req32.count, &argp->count)
+ || put_user(req32.virtual, &argp->virtual))
+ return -EFAULT;
+
+ return 0;
+}
+
+typedef struct drm_buf_free32 {
+ int count;
+ u32 list;
+} drm_buf_free32_t;
+
+static int compat_drm_freebufs(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_buf_free32_t req32;
+ struct drm_buf_free request;
+ drm_buf_free32_t __user *argp = (void __user *)arg;
+
+ if (copy_from_user(&req32, argp, sizeof(req32)))
+ return -EFAULT;
+
+ request.count = req32.count;
+ request.list = compat_ptr(req32.list);
+ return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
+}
+
+typedef struct drm_ctx_priv_map32 {
+ unsigned int ctx_id; /**< Context requesting private mapping */
+ u32 handle; /**< Handle of map */
+} drm_ctx_priv_map32_t;
+
+static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_ctx_priv_map32_t req32;
+ struct drm_ctx_priv_map request;
+ drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
+
+ if (copy_from_user(&req32, argp, sizeof(req32)))
+ return -EFAULT;
+
+ request.ctx_id = req32.ctx_id;
+ request.handle = compat_ptr(req32.handle);
+ return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+}
+
+static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct drm_ctx_priv_map req;
+ drm_ctx_priv_map32_t req32;
+ drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
+ int err;
+
+ if (copy_from_user(&req32, argp, sizeof(req32)))
+ return -EFAULT;
+
+ req.ctx_id = req32.ctx_id;
+ err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
+ if (err)
+ return err;
+
+ req32.handle = ptr_to_compat(req.handle);
+ if (copy_to_user(argp, &req32, sizeof(req32)))
+ return -EFAULT;
+
+ return 0;
+}
+
+typedef struct drm_ctx_res32 {
+ int count;
+ u32 contexts;
+} drm_ctx_res32_t;
+
+static int compat_drm_resctx(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_ctx_res32_t __user *argp = (void __user *)arg;
+ drm_ctx_res32_t res32;
+ struct drm_ctx_res res;
+ int err;
+
+ if (copy_from_user(&res32, argp, sizeof(res32)))
+ return -EFAULT;
+
+ res.count = res32.count;
+ res.contexts = compat_ptr(res32.contexts);
+ err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
+ if (err)
+ return err;
+
+ res32.count = res.count;
+ if (copy_to_user(argp, &res32, sizeof(res32)))
+ return -EFAULT;
+
+ return 0;
+}
+
+typedef struct drm_dma32 {
+ int context; /**< Context handle */
+ int send_count; /**< Number of buffers to send */
+ u32 send_indices; /**< List of handles to buffers */
+ u32 send_sizes; /**< Lengths of data to send */
+ enum drm_dma_flags flags; /**< Flags */
+ int request_count; /**< Number of buffers requested */
+ int request_size; /**< Desired size for buffers */
+ u32 request_indices; /**< Buffer information */
+ u32 request_sizes;
+ int granted_count; /**< Number of buffers granted */
+} drm_dma32_t;
+
+static int compat_drm_dma(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_dma32_t d32;
+ drm_dma32_t __user *argp = (void __user *)arg;
+ struct drm_dma d;
+ int err;
+
+ if (copy_from_user(&d32, argp, sizeof(d32)))
+ return -EFAULT;
+
+ d.context = d32.context;
+ d.send_count = d32.send_count;
+ d.send_indices = compat_ptr(d32.send_indices);
+ d.send_sizes = compat_ptr(d32.send_sizes);
+ d.flags = d32.flags;
+ d.request_count = d32.request_count;
+ d.request_indices = compat_ptr(d32.request_indices);
+ d.request_sizes = compat_ptr(d32.request_sizes);
+ err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
+ if (err)
+ return err;
+
+ if (put_user(d.request_size, &argp->request_size)
+ || put_user(d.granted_count, &argp->granted_count))
+ return -EFAULT;
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_AGP)
+typedef struct drm_agp_mode32 {
+ u32 mode; /**< AGP mode */
+} drm_agp_mode32_t;
+
+static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_agp_mode32_t __user *argp = (void __user *)arg;
+ struct drm_agp_mode mode;
+
+ if (get_user(mode.mode, &argp->mode))
+ return -EFAULT;
+
+ return drm_ioctl_kernel(file, drm_agp_enable_ioctl, &mode,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+}
+
+typedef struct drm_agp_info32 {
+ int agp_version_major;
+ int agp_version_minor;
+ u32 mode;
+ u32 aperture_base; /* physical address */
+ u32 aperture_size; /* bytes */
+ u32 memory_allowed; /* bytes */
+ u32 memory_used;
+
+ /* PCI information */
+ unsigned short id_vendor;
+ unsigned short id_device;
+} drm_agp_info32_t;
+
+static int compat_drm_agp_info(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_agp_info32_t __user *argp = (void __user *)arg;
+ drm_agp_info32_t i32;
+ struct drm_agp_info info;
+ int err;
+
+ err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH);
+ if (err)
+ return err;
+
+ i32.agp_version_major = info.agp_version_major;
+ i32.agp_version_minor = info.agp_version_minor;
+ i32.mode = info.mode;
+ i32.aperture_base = info.aperture_base;
+ i32.aperture_size = info.aperture_size;
+ i32.memory_allowed = info.memory_allowed;
+ i32.memory_used = info.memory_used;
+ i32.id_vendor = info.id_vendor;
+ i32.id_device = info.id_device;
+ if (copy_to_user(argp, &i32, sizeof(i32)))
+ return -EFAULT;
+
+ return 0;
+}
+
+typedef struct drm_agp_buffer32 {
+ u32 size; /**< In bytes -- will round to page boundary */
+ u32 handle; /**< Used for binding / unbinding */
+ u32 type; /**< Type of memory to allocate */
+ u32 physical; /**< Physical used by i810 */
+} drm_agp_buffer32_t;
+
+static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_agp_buffer32_t __user *argp = (void __user *)arg;
+ drm_agp_buffer32_t req32;
+ struct drm_agp_buffer request;
+ int err;
+
+ if (copy_from_user(&req32, argp, sizeof(req32)))
+ return -EFAULT;
+
+ request.size = req32.size;
+ request.type = req32.type;
+ err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+ if (err)
+ return err;
+
+ req32.handle = request.handle;
+ req32.physical = request.physical;
+ if (copy_to_user(argp, &req32, sizeof(req32))) {
+ drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int compat_drm_agp_free(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_agp_buffer32_t __user *argp = (void __user *)arg;
+ struct drm_agp_buffer request;
+
+ if (get_user(request.handle, &argp->handle))
+ return -EFAULT;
+
+ return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+}
+
+typedef struct drm_agp_binding32 {
+ u32 handle; /**< From drm_agp_buffer */
+ u32 offset; /**< In bytes -- will round to page boundary */
+} drm_agp_binding32_t;
+
+static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_agp_binding32_t __user *argp = (void __user *)arg;
+ drm_agp_binding32_t req32;
+ struct drm_agp_binding request;
+
+ if (copy_from_user(&req32, argp, sizeof(req32)))
+ return -EFAULT;
+
+ request.handle = req32.handle;
+ request.offset = req32.offset;
+ return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+}
+
+static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_agp_binding32_t __user *argp = (void __user *)arg;
+ struct drm_agp_binding request;
+
+ if (get_user(request.handle, &argp->handle))
+ return -EFAULT;
+
+ return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+}
+#endif /* CONFIG_AGP */
+
+typedef struct drm_scatter_gather32 {
+ u32 size; /**< In bytes -- will round to page boundary */
+ u32 handle; /**< Used for mapping / unmapping */
+} drm_scatter_gather32_t;
+
+static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_scatter_gather32_t __user *argp = (void __user *)arg;
+ struct drm_scatter_gather request;
+ int err;
+
+ if (get_user(request.size, &argp->size))
+ return -EFAULT;
+
+ err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+ if (err)
+ return err;
+
+ /* XXX not sure about the handle conversion here... */
+ if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int compat_drm_sg_free(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_scatter_gather32_t __user *argp = (void __user *)arg;
+ struct drm_scatter_gather request;
+ unsigned long x;
+
+ if (get_user(x, &argp->handle))
+ return -EFAULT;
+ request.handle = x << PAGE_SHIFT;
+ return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+}
+
+#if defined(CONFIG_X86)
+typedef struct drm_update_draw32 {
+ drm_drawable_t handle;
+ unsigned int type;
+ unsigned int num;
+ /* 64-bit version has a 32-bit pad here */
+ u64 data; /**< Pointer */
+} __attribute__((packed)) drm_update_draw32_t;
+
+static int compat_drm_update_draw(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_update_draw32_t update32;
+ if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
+ return -EFAULT;
+
+ return drm_ioctl_kernel(file, drm_noop, NULL,
+ DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
+}
+#endif
+
+struct drm_wait_vblank_request32 {
+ enum drm_vblank_seq_type type;
+ unsigned int sequence;
+ u32 signal;
+};
+
+struct drm_wait_vblank_reply32 {
+ enum drm_vblank_seq_type type;
+ unsigned int sequence;
+ s32 tval_sec;
+ s32 tval_usec;
+};
+
+typedef union drm_wait_vblank32 {
+ struct drm_wait_vblank_request32 request;
+ struct drm_wait_vblank_reply32 reply;
+} drm_wait_vblank32_t;
+
+static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_wait_vblank32_t __user *argp = (void __user *)arg;
+ drm_wait_vblank32_t req32;
+ union drm_wait_vblank req;
+ int err;
+
+ if (copy_from_user(&req32, argp, sizeof(req32)))
+ return -EFAULT;
+
+ req.request.type = req32.request.type;
+ req.request.sequence = req32.request.sequence;
+ req.request.signal = req32.request.signal;
+ err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED);
+ if (err)
+ return err;
+
+ req32.reply.type = req.reply.type;
+ req32.reply.sequence = req.reply.sequence;
+ req32.reply.tval_sec = req.reply.tval_sec;
+ req32.reply.tval_usec = req.reply.tval_usec;
+ if (copy_to_user(argp, &req32, sizeof(req32)))
+ return -EFAULT;
+
+ return 0;
+}
+
+#if defined(CONFIG_X86)
+typedef struct drm_mode_fb_cmd232 {
+ u32 fb_id;
+ u32 width;
+ u32 height;
+ u32 pixel_format;
+ u32 flags;
+ u32 handles[4];
+ u32 pitches[4];
+ u32 offsets[4];
+ u64 modifier[4];
+} __attribute__((packed)) drm_mode_fb_cmd232_t;
+
+static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
+ struct drm_mode_fb_cmd2 req64;
+ int err;
+
+ if (copy_from_user(&req64, argp,
+ offsetof(drm_mode_fb_cmd232_t, modifier)))
+ return -EFAULT;
+
+ if (copy_from_user(&req64.modifier, &argp->modifier,
+ sizeof(req64.modifier)))
+ return -EFAULT;
+
+ err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64,
+ DRM_UNLOCKED);
+ if (err)
+ return err;
+
+ if (put_user(req64.fb_id, &argp->fb_id))
+ return -EFAULT;
+
+ return 0;
+}
+#endif
+
+static struct {
+ drm_ioctl_compat_t *fn;
+ char *name;
+} drm_compat_ioctls[] = {
+#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
+ DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
+ DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
+ DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
+ DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
+ DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
+ DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
+ DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
+ DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
+ DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
+ DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
+ DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
+ DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
+ DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
+ DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
+ DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
+ DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
+ DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
+#if IS_ENABLED(CONFIG_AGP)
+ DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
+ DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
+ DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
+ DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
+ DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
+ DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
+#endif
+ DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
+ DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
+#if defined(CONFIG_X86) || defined(CONFIG_IA64)
+ DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
+#endif
+ DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
+#if defined(CONFIG_X86) || defined(CONFIG_IA64)
+ DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
+#endif
+};
+
+/**
+ * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
+ * @filp: file this ioctl is called on
+ * @cmd: ioctl cmd number
+ * @arg: user argument
+ *
+ * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
+ * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
+ * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
+ * botched IOCTL itself, it must handle those by wrapping this function.
+ *
+ * Returns:
+ * Zero on success, negative error code on failure.
+ */
+long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ unsigned int nr = DRM_IOCTL_NR(cmd);
+ struct drm_file *file_priv = filp->private_data;
+ drm_ioctl_compat_t *fn;
+ int ret;
+
+ /* Assume that ioctls without an explicit compat routine will just
+ * work. This may not always be a good assumption, but it's better
+ * than always failing.
+ */
+ if (nr >= ARRAY_SIZE(drm_compat_ioctls))
+ return drm_ioctl(filp, cmd, arg);
+
+ fn = drm_compat_ioctls[nr].fn;
+ if (!fn)
+ return drm_ioctl(filp, cmd, arg);
+
+ DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
+ task_pid_nr(current),
+ (long)old_encode_dev(file_priv->minor->kdev->devt),
+ file_priv->authenticated,
+ drm_compat_ioctls[nr].name);
+ ret = (*fn)(filp, cmd, arg);
+ if (ret)
+ DRM_DEBUG("ret = %d\n", ret);
+ return ret;
+}
+EXPORT_SYMBOL(drm_compat_ioctl);