| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Dave Airlie | 2399 | 49.67% | 5 | 7.14% |
| Al Viro | 1312 | 27.16% | 25 | 35.71% |
| Linus Torvalds (pre-git) | 607 | 12.57% | 12 | 17.14% |
| Tvrtko A. Ursulin | 124 | 2.57% | 2 | 2.86% |
| Daniel Vetter | 115 | 2.38% | 7 | 10.00% |
| Linus Torvalds | 112 | 2.32% | 1 | 1.43% |
| Eric Anholt | 61 | 1.26% | 3 | 4.29% |
| David S. Miller | 28 | 0.58% | 1 | 1.43% |
| Ben Dooks | 15 | 0.31% | 1 | 1.43% |
| Jeffy Chen | 12 | 0.25% | 1 | 1.43% |
| Thomas Zimmermann | 9 | 0.19% | 1 | 1.43% |
| Ian Romanick | 7 | 0.14% | 1 | 1.43% |
| Kristian H. Kristensen | 6 | 0.12% | 1 | 1.43% |
| Emil Velikov | 5 | 0.10% | 1 | 1.43% |
| Christian Dietrich | 3 | 0.06% | 1 | 1.43% |
| Sam Ravnborg | 3 | 0.06% | 1 | 1.43% |
| Paul Gortmaker | 3 | 0.06% | 1 | 1.43% |
| Julia Lawall | 3 | 0.06% | 1 | 1.43% |
| Joe Perches | 2 | 0.04% | 1 | 1.43% |
| Dan Carpenter | 2 | 0.04% | 1 | 1.43% |
| Ville Syrjälä | 1 | 0.02% | 1 | 1.43% |
| Mark Yacoub | 1 | 0.02% | 1 | 1.43% |
| Total | 4830 | 70 |
/* * \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) 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) 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; struct drm_device *dev = file_priv->minor->dev; 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_dbg_core(dev, "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_dbg_core(dev, "ret = %d\n", ret); return ret; } EXPORT_SYMBOL(drm_compat_ioctl);
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