diff options
Diffstat (limited to 'drivers/gpu/drm/drm_ioc32.c')
| -rw-r--r-- | drivers/gpu/drm/drm_ioc32.c | 999 |
1 files changed, 999 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_ioc32.c b/drivers/gpu/drm/drm_ioc32.c new file mode 100644 index 000000000..5d82891c3 --- /dev/null +++ b/drivers/gpu/drm/drm_ioc32.c @@ -0,0 +1,999 @@ +/* + * \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/drm_file.h> +#include <drm/drm_print.h> + +#include "drm_crtc_internal.h" +#include "drm_internal.h" +#include "drm_legacy.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; + + memset(&v, 0, sizeof(v)); + + 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_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; + + memset(&uq, 0, sizeof(uq)); + + uq = (struct drm_unique){ + .unique_len = uq32.unique_len, + .unique = compat_ptr(uq32.unique), + }; + + err = drm_ioctl_kernel(file, drm_getunique, &uq, 0); + 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; +} + +#if IS_ENABLED(CONFIG_DRM_LEGACY) +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, 0); + 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((void __user *)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((void __user *)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); +} +#endif + +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; + + memset(&client, 0, sizeof(client)); + + client.idx = c32.idx; + + err = drm_ioctl_kernel(file, drm_getclient, &client, 0); + 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; + + /* getstats is defunct, just clear */ + if (clear_user(argp, sizeof(drm_stats32_t))) + return -EFAULT; + return 0; +} + +#if IS_ENABLED(CONFIG_DRM_LEGACY) +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}; + + if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags))) + return -EFAULT; + return 0; +} + +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((void __user *)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; +} +#endif + +#if IS_ENABLED(CONFIG_DRM_LEGACY) +#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_legacy_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_legacy_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_legacy_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_legacy_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_legacy_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_legacy_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_legacy_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); +} +#endif +#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) +{ + /* update_draw is defunct */ + return 0; +} +#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; + + memset(&req, 0, sizeof(req)); + + 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); + + 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 err; +} + +#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; + + memset(&req64, 0, sizeof(req64)); + + 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, 0); + 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), +#if IS_ENABLED(CONFIG_DRM_LEGACY) + DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap), +#endif + 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), +#if IS_ENABLED(CONFIG_DRM_LEGACY) + 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 +#endif +#if IS_ENABLED(CONFIG_DRM_LEGACY) + DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc), + DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free), +#endif +#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("comm=\"%s\", pid=%d, dev=0x%lx, auth=%d, %s\n", + current->comm, 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); |