[PATCH 10/12] drm: merge drm_drv.c into drm_ioctl.c
David Herrmann
dh.herrmann at gmail.com
Wed Jul 23 08:26:45 PDT 2014
All that is left in drm_drv.c is ioctl management. Merge it into
drm_ioctl.c so we have all ioctl management in one file (and the name is
much more fitting).
Maybe we should now rename drm_stub.c to drm_drv.c again?
Signed-off-by: David Herrmann <dh.herrmann at gmail.com>
---
drivers/gpu/drm/drm_drv.c | 412 --------------------------------------------
drivers/gpu/drm/drm_ioctl.c | 369 ++++++++++++++++++++++++++++++++++++++-
2 files changed, 361 insertions(+), 420 deletions(-)
delete mode 100644 drivers/gpu/drm/drm_drv.c
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
deleted file mode 100644
index 190df83..0000000
--- a/drivers/gpu/drm/drm_drv.c
+++ /dev/null
@@ -1,412 +0,0 @@
-/**
- * \file drm_drv.c
- * Generic driver template
- *
- * \author Rickard E. (Rik) Faith <faith at valinux.com>
- * \author Gareth Hughes <gareth at valinux.com>
- *
- * To use this template, you must at least define the following (samples
- * given for the MGA driver):
- *
- * \code
- * #define DRIVER_AUTHOR "VA Linux Systems, Inc."
- *
- * #define DRIVER_NAME "mga"
- * #define DRIVER_DESC "Matrox G200/G400"
- * #define DRIVER_DATE "20001127"
- *
- * #define drm_x mga_##x
- * \endcode
- */
-
-/*
- * Created: Thu Nov 23 03:10:50 2000 by gareth at valinux.com
- *
- * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
- * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
- * 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
- * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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/debugfs.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-#include <drm/drmP.h>
-#include <drm/drm_core.h>
-
-
-static int drm_version(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-
-#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
- [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
-
-/** Ioctl table */
-static const struct drm_ioctl_desc drm_ioctls[] = {
- DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
- DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
- DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
- DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
-
- DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
-
- DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
-
- DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
-
- DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
-
- DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
- DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
-
- DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
-
- DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
- DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
-
- DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
-
- DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
- DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
- DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
- DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
-
- DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
-
-#if __OS_HAS_AGP
- DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
- DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
-#endif
-
- DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
- DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
-
- DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
-
- DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
-
- DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
-
- DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
-
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
-
- DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
-
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
-};
-
-#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
-
-/**
- * Copy and IOCTL return string to user space
- */
-static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
-{
- int len;
-
- /* don't overflow userbuf */
- len = strlen(value);
- if (len > *buf_len)
- len = *buf_len;
-
- /* let userspace know exact length of driver value (which could be
- * larger than the userspace-supplied buffer) */
- *buf_len = strlen(value);
-
- /* finally, try filling in the userbuf */
- if (len && buf)
- if (copy_to_user(buf, value, len))
- return -EFAULT;
- return 0;
-}
-
-/**
- * Get version information
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument, pointing to a drm_version structure.
- * \return zero on success or negative number on failure.
- *
- * Fills in the version information in \p arg.
- */
-static int drm_version(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_version *version = data;
- int err;
-
- version->version_major = dev->driver->major;
- version->version_minor = dev->driver->minor;
- version->version_patchlevel = dev->driver->patchlevel;
- err = drm_copy_field(version->name, &version->name_len,
- dev->driver->name);
- if (!err)
- err = drm_copy_field(version->date, &version->date_len,
- dev->driver->date);
- if (!err)
- err = drm_copy_field(version->desc, &version->desc_len,
- dev->driver->desc);
-
- return err;
-}
-
-/**
- * drm_ioctl_permit - Check ioctl permissions against caller
- *
- * @flags: ioctl permission flags.
- * @file_priv: Pointer to struct drm_file identifying the caller.
- *
- * Checks whether the caller is allowed to run an ioctl with the
- * indicated permissions. If so, returns zero. Otherwise returns an
- * error code suitable for ioctl return.
- */
-static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
-{
- /* ROOT_ONLY is only for CAP_SYS_ADMIN */
- if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
- return -EACCES;
-
- /* AUTH is only for authenticated or render client */
- if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
- !file_priv->authenticated))
- return -EACCES;
-
- /* MASTER is only for master or control clients */
- if (unlikely((flags & DRM_MASTER) && !drm_is_master(file_priv) &&
- !drm_is_control_client(file_priv)))
- return -EACCES;
-
- /* Control clients must be explicitly allowed */
- if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
- drm_is_control_client(file_priv)))
- return -EACCES;
-
- /* Render clients must be explicitly allowed */
- if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
- drm_is_render_client(file_priv)))
- return -EACCES;
-
- return 0;
-}
-
-/**
- * Called whenever a process performs an ioctl on /dev/drm.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg user argument.
- * \return zero on success or negative number on failure.
- *
- * Looks up the ioctl function in the ::ioctls table, checking for root
- * previleges if so required, and dispatches to the respective function.
- */
-long drm_ioctl(struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- struct drm_file *file_priv = filp->private_data;
- struct drm_device *dev;
- const struct drm_ioctl_desc *ioctl = NULL;
- drm_ioctl_t *func;
- unsigned int nr = DRM_IOCTL_NR(cmd);
- int retcode = -EINVAL;
- char stack_kdata[128];
- char *kdata = NULL;
- unsigned int usize, asize;
-
- dev = file_priv->minor->dev;
-
- if (drm_device_is_unplugged(dev))
- return -ENODEV;
-
- if ((nr >= DRM_CORE_IOCTL_COUNT) &&
- ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
- goto err_i1;
- if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
- (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
- u32 drv_size;
- ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
- drv_size = _IOC_SIZE(ioctl->cmd_drv);
- usize = asize = _IOC_SIZE(cmd);
- if (drv_size > asize)
- asize = drv_size;
- cmd = ioctl->cmd_drv;
- }
- else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
- u32 drv_size;
-
- ioctl = &drm_ioctls[nr];
-
- drv_size = _IOC_SIZE(ioctl->cmd);
- usize = asize = _IOC_SIZE(cmd);
- if (drv_size > asize)
- asize = drv_size;
-
- cmd = ioctl->cmd;
- } else
- goto err_i1;
-
- 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, ioctl->name);
-
- /* Do not trust userspace, use our own definition */
- func = ioctl->func;
-
- if (unlikely(!func)) {
- DRM_DEBUG("no function\n");
- retcode = -EINVAL;
- goto err_i1;
- }
-
- retcode = drm_ioctl_permit(ioctl->flags, file_priv);
- if (unlikely(retcode))
- goto err_i1;
-
- if (cmd & (IOC_IN | IOC_OUT)) {
- if (asize <= sizeof(stack_kdata)) {
- kdata = stack_kdata;
- } else {
- kdata = kmalloc(asize, GFP_KERNEL);
- if (!kdata) {
- retcode = -ENOMEM;
- goto err_i1;
- }
- }
- if (asize > usize)
- memset(kdata + usize, 0, asize - usize);
- }
-
- if (cmd & IOC_IN) {
- if (copy_from_user(kdata, (void __user *)arg,
- usize) != 0) {
- retcode = -EFAULT;
- goto err_i1;
- }
- } else if (cmd & IOC_OUT) {
- memset(kdata, 0, usize);
- }
-
- if (ioctl->flags & DRM_UNLOCKED)
- retcode = func(dev, kdata, file_priv);
- else {
- mutex_lock(&drm_global_mutex);
- retcode = func(dev, kdata, file_priv);
- mutex_unlock(&drm_global_mutex);
- }
-
- if (cmd & IOC_OUT) {
- if (copy_to_user((void __user *)arg, kdata,
- usize) != 0)
- retcode = -EFAULT;
- }
-
- err_i1:
- if (!ioctl)
- DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
- task_pid_nr(current),
- (long)old_encode_dev(file_priv->minor->kdev->devt),
- file_priv->authenticated, cmd, nr);
-
- if (kdata != stack_kdata)
- kfree(kdata);
- if (retcode)
- DRM_DEBUG("ret = %d\n", retcode);
- return retcode;
-}
-EXPORT_SYMBOL(drm_ioctl);
-
-/**
- * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
- *
- * @nr: Ioctl number.
- * @flags: Where to return the ioctl permission flags
- */
-bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
-{
- if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
- (nr < DRM_COMMAND_BASE)) {
- *flags = drm_ioctls[nr].flags;
- return true;
- }
-
- return false;
-}
-EXPORT_SYMBOL(drm_ioctl_flags);
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index ad66f96..22ca14d 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -1,11 +1,3 @@
-/**
- * \file drm_ioctl.c
- * IOCTL processing for DRM
- *
- * \author Rickard E. (Rik) Faith <faith at valinux.com>
- * \author Gareth Hughes <gareth at valinux.com>
- */
-
/*
* Created: Fri Jan 8 09:01:26 1999 by faith at valinux.com
*
@@ -13,6 +5,9 @@
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* All Rights Reserved.
*
+ * Author Rickard E. (Rik) Faith <faith at valinux.com>
+ * Author Gareth Hughes <gareth at valinux.com>
+ *
* 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
@@ -42,6 +37,124 @@
#include <asm/mtrr.h>
#endif
+static int drm_version(struct drm_device *dev, void *data,
+ struct drm_file *file_priv);
+
+#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
+ [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
+
+/** Ioctl table */
+static const struct drm_ioctl_desc drm_ioctls[] = {
+ DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
+ DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
+ DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
+ DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
+ DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
+ DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
+ DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
+ DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
+ DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+
+#if __OS_HAS_AGP
+ DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
+ DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+#endif
+
+ DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+ DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
+
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+};
+
+#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
+
/**
* Get the bus id.
*
@@ -415,3 +528,243 @@ int drm_noop(struct drm_device *dev, void *data,
return 0;
}
EXPORT_SYMBOL(drm_noop);
+
+/**
+ * Copy and IOCTL return string to user space
+ */
+static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
+{
+ int len;
+
+ /* don't overflow userbuf */
+ len = strlen(value);
+ if (len > *buf_len)
+ len = *buf_len;
+
+ /* let userspace know exact length of driver value (which could be
+ * larger than the userspace-supplied buffer) */
+ *buf_len = strlen(value);
+
+ /* finally, try filling in the userbuf */
+ if (len && buf)
+ if (copy_to_user(buf, value, len))
+ return -EFAULT;
+ return 0;
+}
+
+/**
+ * Get version information
+ *
+ * \param inode device inode.
+ * \param filp file pointer.
+ * \param cmd command.
+ * \param arg user argument, pointing to a drm_version structure.
+ * \return zero on success or negative number on failure.
+ *
+ * Fills in the version information in \p arg.
+ */
+static int drm_version(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_version *version = data;
+ int err;
+
+ version->version_major = dev->driver->major;
+ version->version_minor = dev->driver->minor;
+ version->version_patchlevel = dev->driver->patchlevel;
+ err = drm_copy_field(version->name, &version->name_len,
+ dev->driver->name);
+ if (!err)
+ err = drm_copy_field(version->date, &version->date_len,
+ dev->driver->date);
+ if (!err)
+ err = drm_copy_field(version->desc, &version->desc_len,
+ dev->driver->desc);
+
+ return err;
+}
+
+/**
+ * drm_ioctl_permit - Check ioctl permissions against caller
+ *
+ * @flags: ioctl permission flags.
+ * @file_priv: Pointer to struct drm_file identifying the caller.
+ *
+ * Checks whether the caller is allowed to run an ioctl with the
+ * indicated permissions. If so, returns zero. Otherwise returns an
+ * error code suitable for ioctl return.
+ */
+static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
+{
+ /* ROOT_ONLY is only for CAP_SYS_ADMIN */
+ if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
+ return -EACCES;
+
+ /* AUTH is only for authenticated or render client */
+ if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
+ !file_priv->authenticated))
+ return -EACCES;
+
+ /* MASTER is only for master or control clients */
+ if (unlikely((flags & DRM_MASTER) && !drm_is_master(file_priv) &&
+ !drm_is_control_client(file_priv)))
+ return -EACCES;
+
+ /* Control clients must be explicitly allowed */
+ if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
+ drm_is_control_client(file_priv)))
+ return -EACCES;
+
+ /* Render clients must be explicitly allowed */
+ if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
+ drm_is_render_client(file_priv)))
+ return -EACCES;
+
+ return 0;
+}
+
+/**
+ * Called whenever a process performs an ioctl on /dev/drm.
+ *
+ * \param inode device inode.
+ * \param file_priv DRM file private.
+ * \param cmd command.
+ * \param arg user argument.
+ * \return zero on success or negative number on failure.
+ *
+ * Looks up the ioctl function in the ::ioctls table, checking for root
+ * previleges if so required, and dispatches to the respective function.
+ */
+long drm_ioctl(struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ struct drm_file *file_priv = filp->private_data;
+ struct drm_device *dev;
+ const struct drm_ioctl_desc *ioctl = NULL;
+ drm_ioctl_t *func;
+ unsigned int nr = DRM_IOCTL_NR(cmd);
+ int retcode = -EINVAL;
+ char stack_kdata[128];
+ char *kdata = NULL;
+ unsigned int usize, asize;
+
+ dev = file_priv->minor->dev;
+
+ if (drm_device_is_unplugged(dev))
+ return -ENODEV;
+
+ if ((nr >= DRM_CORE_IOCTL_COUNT) &&
+ ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
+ goto err_i1;
+ if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
+ (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
+ u32 drv_size;
+ ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
+ drv_size = _IOC_SIZE(ioctl->cmd_drv);
+ usize = asize = _IOC_SIZE(cmd);
+ if (drv_size > asize)
+ asize = drv_size;
+ cmd = ioctl->cmd_drv;
+ }
+ else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
+ u32 drv_size;
+
+ ioctl = &drm_ioctls[nr];
+
+ drv_size = _IOC_SIZE(ioctl->cmd);
+ usize = asize = _IOC_SIZE(cmd);
+ if (drv_size > asize)
+ asize = drv_size;
+
+ cmd = ioctl->cmd;
+ } else
+ goto err_i1;
+
+ 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, ioctl->name);
+
+ /* Do not trust userspace, use our own definition */
+ func = ioctl->func;
+
+ if (unlikely(!func)) {
+ DRM_DEBUG("no function\n");
+ retcode = -EINVAL;
+ goto err_i1;
+ }
+
+ retcode = drm_ioctl_permit(ioctl->flags, file_priv);
+ if (unlikely(retcode))
+ goto err_i1;
+
+ if (cmd & (IOC_IN | IOC_OUT)) {
+ if (asize <= sizeof(stack_kdata)) {
+ kdata = stack_kdata;
+ } else {
+ kdata = kmalloc(asize, GFP_KERNEL);
+ if (!kdata) {
+ retcode = -ENOMEM;
+ goto err_i1;
+ }
+ }
+ if (asize > usize)
+ memset(kdata + usize, 0, asize - usize);
+ }
+
+ if (cmd & IOC_IN) {
+ if (copy_from_user(kdata, (void __user *)arg,
+ usize) != 0) {
+ retcode = -EFAULT;
+ goto err_i1;
+ }
+ } else if (cmd & IOC_OUT) {
+ memset(kdata, 0, usize);
+ }
+
+ if (ioctl->flags & DRM_UNLOCKED)
+ retcode = func(dev, kdata, file_priv);
+ else {
+ mutex_lock(&drm_global_mutex);
+ retcode = func(dev, kdata, file_priv);
+ mutex_unlock(&drm_global_mutex);
+ }
+
+ if (cmd & IOC_OUT) {
+ if (copy_to_user((void __user *)arg, kdata,
+ usize) != 0)
+ retcode = -EFAULT;
+ }
+
+ err_i1:
+ if (!ioctl)
+ DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
+ task_pid_nr(current),
+ (long)old_encode_dev(file_priv->minor->kdev->devt),
+ file_priv->authenticated, cmd, nr);
+
+ if (kdata != stack_kdata)
+ kfree(kdata);
+ if (retcode)
+ DRM_DEBUG("ret = %d\n", retcode);
+ return retcode;
+}
+EXPORT_SYMBOL(drm_ioctl);
+
+/**
+ * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
+ *
+ * @nr: Ioctl number.
+ * @flags: Where to return the ioctl permission flags
+ */
+bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
+{
+ if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
+ (nr < DRM_COMMAND_BASE)) {
+ *flags = drm_ioctls[nr].flags;
+ return true;
+ }
+
+ return false;
+}
+EXPORT_SYMBOL(drm_ioctl_flags);
--
2.0.2
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