comedi_fops.c revision 3c17ba0743d75f9888d905ddf9f8551c7dd36493
1ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 2ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi/comedi_fops.c 3ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi kernel module 4ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 5ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI - Linux Control and Measurement Device Interface 6ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org> 7ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 8ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef This program is free software; you can redistribute it and/or modify 9ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef it under the terms of the GNU General Public License as published by 10ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef the Free Software Foundation; either version 2 of the License, or 11ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef (at your option) any later version. 12ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 13ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef This program is distributed in the hope that it will be useful, 14ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef but WITHOUT ANY WARRANTY; without even the implied warranty of 15ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef GNU General Public License for more details. 17ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 18ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef You should have received a copy of the GNU General Public License 19ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef along with this program; if not, write to the Free Software 20ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 22ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 23ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 24ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#undef DEBUG 25ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 26ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#define __NO_VERSION__ 27ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include "comedi_fops.h" 28ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include "comedi_compat32.h" 29ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 30ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/module.h> 31ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/errno.h> 32ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/kernel.h> 33ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/sched.h> 34ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/fcntl.h> 35ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/delay.h> 36ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/ioport.h> 37ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/mm.h> 38ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/slab.h> 39ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/kmod.h> 40ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/poll.h> 41ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/init.h> 42ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/device.h> 43ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/vmalloc.h> 44ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/fs.h> 45ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include "comedidev.h" 46ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#include <linux/cdev.h> 47883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess#include <linux/stat.h> 48ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 49476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman#include <linux/io.h> 50476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman#include <linux/uaccess.h> 51ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 52242e7ad91a067243d7ab63b6a25ed2e085733446Greg Kroah-Hartman#include "internal.h" 53ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 54ed9eccbe8970f6eedc1b978c157caf1251a896d4David SchleefMODULE_AUTHOR("http://www.comedi.org"); 55ed9eccbe8970f6eedc1b978c157caf1251a896d4David SchleefMODULE_DESCRIPTION("Comedi core module"); 56ed9eccbe8970f6eedc1b978c157caf1251a896d4David SchleefMODULE_LICENSE("GPL"); 57ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 58ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#ifdef CONFIG_COMEDI_DEBUG 59ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefint comedi_debug; 6018736438ae4ab3d96602b92446e07cc03c024b02Greg Kroah-HartmanEXPORT_SYMBOL(comedi_debug); 61ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefmodule_param(comedi_debug, int, 0644); 62ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#endif 63ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 646a9d7a21d710e544df20266b83b7829d9f7a1020Ian Abbottint comedi_autoconfig = 1; 656a9d7a21d710e544df20266b83b7829d9f7a1020Ian Abbottmodule_param(comedi_autoconfig, bool, 0444); 666a9d7a21d710e544df20266b83b7829d9f7a1020Ian Abbott 6792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int comedi_num_legacy_minors; 681dd33ab8a9397793d65b9fc090174ff7cdfaff95Bernd Porrmodule_param(comedi_num_legacy_minors, int, 0444); 691dd33ab8a9397793d65b9fc090174ff7cdfaff95Bernd Porr 70ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic DEFINE_SPINLOCK(comedi_file_info_table_lock); 71476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmanstatic struct comedi_device_file_info 720a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral*comedi_file_info_table[COMEDI_NUM_MINORS]; 73476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman 740a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_devconfig_ioctl(struct comedi_device *dev, 7592d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_devconfig __user *arg); 7692d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_bufconfig_ioctl(struct comedi_device *dev, 7792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_bufconfig __user *arg); 780a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_devinfo_ioctl(struct comedi_device *dev, 7992d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_devinfo __user *arg, 8092d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct file *file); 810a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_subdinfo_ioctl(struct comedi_device *dev, 8292d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_subdinfo __user *arg, void *file); 830a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_chaninfo_ioctl(struct comedi_device *dev, 8492d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_chaninfo __user *arg); 8592d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_bufinfo_ioctl(struct comedi_device *dev, 8653fa827e295d8b09a2446b3126577244644d256dIan Abbott struct comedi_bufinfo __user *arg, void *file); 8792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_cmd_ioctl(struct comedi_device *dev, 8892d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_cmd __user *arg, void *file); 890a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_lock_ioctl(struct comedi_device *dev, unsigned int arg, 900a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral void *file); 910a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_unlock_ioctl(struct comedi_device *dev, unsigned int arg, 920a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral void *file); 930a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_cancel_ioctl(struct comedi_device *dev, unsigned int arg, 940a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral void *file); 9592d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_cmdtest_ioctl(struct comedi_device *dev, 9692d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_cmd __user *arg, void *file); 9792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_insnlist_ioctl(struct comedi_device *dev, 9892d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_insnlist __user *arg, void *file); 9992d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_insn_ioctl(struct comedi_device *dev, 10092d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_insn __user *arg, void *file); 1010a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_poll_ioctl(struct comedi_device *dev, unsigned int subd, 1020a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral void *file); 10371b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton 1040a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralextern void do_become_nonbusy(struct comedi_device *dev, 1050a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral struct comedi_subdevice *s); 10634c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pembertonstatic int do_cancel(struct comedi_device *dev, struct comedi_subdevice *s); 107ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 108ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic int comedi_fasync(int fd, struct file *file, int on); 109ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 11071b5f4f11971dea972832ad63a994c7e5b45db6bBill Pembertonstatic int is_device_busy(struct comedi_device *dev); 111883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic int resize_async_buffer(struct comedi_device *dev, 112883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *s, 113883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_async *async, unsigned new_size); 114883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 115883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess/* declarations for sysfs attribute files */ 116883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic struct device_attribute dev_attr_max_read_buffer_kb; 117883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic struct device_attribute dev_attr_read_buffer_kb; 118883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic struct device_attribute dev_attr_max_write_buffer_kb; 119883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic struct device_attribute dev_attr_write_buffer_kb; 120ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 121ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic long comedi_unlocked_ioctl(struct file *file, unsigned int cmd, 122476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman unsigned long arg) 123ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 124ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef const unsigned minor = iminor(file->f_dentry->d_inode); 125476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman struct comedi_device_file_info *dev_file_info = 126476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_device_file_info(minor); 12771b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton struct comedi_device *dev; 128ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int rc; 129ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 13053b670a75bef4bf6484bbf6ca6a896c365676fd4Frank Mori Hess if (dev_file_info == NULL || dev_file_info->device == NULL) 13153b670a75bef4bf6484bbf6ca6a896c365676fd4Frank Mori Hess return -ENODEV; 13253b670a75bef4bf6484bbf6ca6a896c365676fd4Frank Mori Hess dev = dev_file_info->device; 13353b670a75bef4bf6484bbf6ca6a896c365676fd4Frank Mori Hess 134ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_lock(&dev->mutex); 135ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 136ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* Device config is special, because it must work on 137ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * an unconfigured device. */ 138ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (cmd == COMEDI_DEVCONFIG) { 13992d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_devconfig_ioctl(dev, 14092d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman (struct comedi_devconfig __user *)arg); 141ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 142ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 143ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 144ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!dev->attached) { 145ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("no driver configured on /dev/comedi%i\n", dev->minor); 146ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef rc = -ENODEV; 147ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 148ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 149ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 150ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef switch (cmd) { 151ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_BUFCONFIG: 15292d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_bufconfig_ioctl(dev, 15392d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman (struct comedi_bufconfig __user *)arg); 154ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 155ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_DEVINFO: 15692d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_devinfo_ioctl(dev, (struct comedi_devinfo __user *)arg, 15792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman file); 158ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 159ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_SUBDINFO: 16092d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_subdinfo_ioctl(dev, 16192d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman (struct comedi_subdinfo __user *)arg, 16292d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman file); 163ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 164ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_CHANINFO: 16592d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_chaninfo_ioctl(dev, (void __user *)arg); 166ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 167ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_RANGEINFO: 16892d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_rangeinfo_ioctl(dev, (void __user *)arg); 169ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 170ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_BUFINFO: 17192d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_bufinfo_ioctl(dev, 17253fa827e295d8b09a2446b3126577244644d256dIan Abbott (struct comedi_bufinfo __user *)arg, 17353fa827e295d8b09a2446b3126577244644d256dIan Abbott file); 174ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 175ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_LOCK: 176ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef rc = do_lock_ioctl(dev, arg, file); 177ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 178ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_UNLOCK: 179ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef rc = do_unlock_ioctl(dev, arg, file); 180ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 181ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_CANCEL: 182ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef rc = do_cancel_ioctl(dev, arg, file); 183ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 184ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_CMD: 18592d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_cmd_ioctl(dev, (struct comedi_cmd __user *)arg, file); 186ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 187ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_CMDTEST: 18892d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_cmdtest_ioctl(dev, (struct comedi_cmd __user *)arg, 18992d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman file); 190ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 191ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_INSNLIST: 19292d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_insnlist_ioctl(dev, 19392d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman (struct comedi_insnlist __user *)arg, 19492d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman file); 195ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 196ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_INSN: 19792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman rc = do_insn_ioctl(dev, (struct comedi_insn __user *)arg, 19892d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman file); 199ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 200ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case COMEDI_POLL: 201ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef rc = do_poll_ioctl(dev, arg, file); 202ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 203ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef default: 204ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef rc = -ENOTTY; 205ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 206ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 207ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 208476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmandone: 209ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 210ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return rc; 211ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 212ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 213ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 214ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_DEVCONFIG 215ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef device config ioctl 216ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 217ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 218ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef pointer to devconfig structure 219ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 220ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 221ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef devconfig structure at arg 222ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 223ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 224ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef none 225ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 2260a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_devconfig_ioctl(struct comedi_device *dev, 22792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_devconfig __user *arg) 228ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 2290707bb04be89b18ee83b5a997e36cc585f0b988dBill Pemberton struct comedi_devconfig it; 230ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int ret; 231ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned char *aux_data = NULL; 232ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int aux_len; 233ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 234ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!capable(CAP_SYS_ADMIN)) 235ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EPERM; 236ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 237ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (arg == NULL) { 238ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (is_device_busy(dev)) 239ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EBUSY; 240476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (dev->attached) { 241ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef struct module *driver_module = dev->driver->module; 242ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_device_detach(dev); 243ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef module_put(driver_module); 244ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 245ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 246ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 247ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2480707bb04be89b18ee83b5a997e36cc585f0b988dBill Pemberton if (copy_from_user(&it, arg, sizeof(struct comedi_devconfig))) 249ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 250ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 251ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef it.board_name[COMEDI_NAMELEN - 1] = 0; 252ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 253ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (comedi_aux_data(it.options, 0) && 254476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman it.options[COMEDI_DEVCONF_AUX_DATA_LENGTH]) { 255ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int bit_shift; 256ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef aux_len = it.options[COMEDI_DEVCONF_AUX_DATA_LENGTH]; 257ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (aux_len < 0) 258ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 259ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 260ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef aux_data = vmalloc(aux_len); 261ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!aux_data) 262ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -ENOMEM; 263ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 264ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (copy_from_user(aux_data, 265476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_aux_data(it.options, 0), aux_len)) { 266ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef vfree(aux_data); 267ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 268ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 269ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef it.options[COMEDI_DEVCONF_AUX_DATA_LO] = 270476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman (unsigned long)aux_data; 271ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (sizeof(void *) > sizeof(int)) { 272ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bit_shift = sizeof(int) * 8; 273ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef it.options[COMEDI_DEVCONF_AUX_DATA_HI] = 274476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman ((unsigned long)aux_data) >> bit_shift; 275ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } else 276ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef it.options[COMEDI_DEVCONF_AUX_DATA_HI] = 0; 277ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 278ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 279ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = comedi_device_attach(dev, &it); 280476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (ret == 0) { 281476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (!try_module_get(dev->driver->module)) { 282ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_device_detach(dev); 283ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -ENOSYS; 284ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 285ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 286ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 287ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (aux_data) 288ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef vfree(aux_data); 289ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 290ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return ret; 291ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 292ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 293ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 294ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_BUFCONFIG 295ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef buffer configuration ioctl 296ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 297ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 298ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef pointer to bufconfig structure 299ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 300ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 301ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bufconfig at arg 302ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 303ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 304ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef modified bufconfig at arg 305ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 306ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 30792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_bufconfig_ioctl(struct comedi_device *dev, 30892d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_bufconfig __user *arg) 309ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 310be6aba4a423629126f318d351b2d0eb00abb9dd5Bill Pemberton struct comedi_bufconfig bc; 311d163679ceec20c50f9aee880fa76c0c1185244a8Bill Pemberton struct comedi_async *async; 31234c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 313883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess int retval = 0; 314ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 315be6aba4a423629126f318d351b2d0eb00abb9dd5Bill Pemberton if (copy_from_user(&bc, arg, sizeof(struct comedi_bufconfig))) 316ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 317ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 318ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (bc.subdevice >= dev->n_subdevices || bc.subdevice < 0) 319ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 320ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 321ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + bc.subdevice; 322ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async = s->async; 323ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 324ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!async) { 325ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("subdevice does not have async capability\n"); 326ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bc.size = 0; 327ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bc.maximum_size = 0; 328ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto copyback; 329ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 330ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 331ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (bc.maximum_size) { 332ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!capable(CAP_SYS_ADMIN)) 333ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EPERM; 334ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 335ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async->max_bufsize = bc.maximum_size; 336ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 337ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 338ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (bc.size) { 339883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = resize_async_buffer(dev, s, async, bc.size); 340883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval < 0) 341883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 342ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 343ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 344ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bc.size = async->prealloc_bufsz; 345ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bc.maximum_size = async->max_bufsize; 346ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 347476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmancopyback: 348be6aba4a423629126f318d351b2d0eb00abb9dd5Bill Pemberton if (copy_to_user(arg, &bc, sizeof(struct comedi_bufconfig))) 349ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 350ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 351ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 352ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 353ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 354ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 355ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_DEVINFO 356ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef device info ioctl 357ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 358ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 359ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef pointer to devinfo structure 360ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 361ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 362ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef none 363ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 364ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 365ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef devinfo structure 366ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 367ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 3680a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_devinfo_ioctl(struct comedi_device *dev, 36992d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_devinfo __user *arg, 37092d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct file *file) 371ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 372063db04b8901c5cf84c552a5053748d183d34e61Bill Pemberton struct comedi_devinfo devinfo; 373ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef const unsigned minor = iminor(file->f_dentry->d_inode); 374476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman struct comedi_device_file_info *dev_file_info = 375476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_device_file_info(minor); 37634c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *read_subdev = 377476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_read_subdevice(dev_file_info); 37834c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *write_subdev = 379476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_write_subdevice(dev_file_info); 380ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 381ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef memset(&devinfo, 0, sizeof(devinfo)); 382ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 383ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* fill devinfo structure */ 384ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef devinfo.version_code = COMEDI_VERSION_CODE; 385ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef devinfo.n_subdevs = dev->n_subdevices; 386ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef memcpy(devinfo.driver_name, dev->driver->driver_name, COMEDI_NAMELEN); 387ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef memcpy(devinfo.board_name, dev->board_name, COMEDI_NAMELEN); 388ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 389476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (read_subdev) 390ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef devinfo.read_subdevice = read_subdev - dev->subdevices; 391476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman else 392ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef devinfo.read_subdevice = -1; 393476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman 394476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (write_subdev) 395ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef devinfo.write_subdevice = write_subdev - dev->subdevices; 396476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman else 397ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef devinfo.write_subdevice = -1; 398ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 399063db04b8901c5cf84c552a5053748d183d34e61Bill Pemberton if (copy_to_user(arg, &devinfo, sizeof(struct comedi_devinfo))) 400ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 401ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 402ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 403ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 404ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 405ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 406ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_SUBDINFO 407ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef subdevice info ioctl 408ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 409ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 410ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef pointer to array of subdevice info structures 411ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 412ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 413ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef none 414ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 415ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 416ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef array of subdevice info structures at arg 417ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 418ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 4190a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_subdinfo_ioctl(struct comedi_device *dev, 42092d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_subdinfo __user *arg, void *file) 421ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 422ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int ret, i; 423bd52efbbcc9f5d70c736b9b73c82aee149da1fe5Bill Pemberton struct comedi_subdinfo *tmp, *us; 42434c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 425ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 4260a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral tmp = 4270a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral kcalloc(dev->n_subdevices, sizeof(struct comedi_subdinfo), 4280a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral GFP_KERNEL); 429ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!tmp) 430ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -ENOMEM; 431ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 432ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* fill subdinfo structs */ 433ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef for (i = 0; i < dev->n_subdevices; i++) { 434ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + i; 435ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us = tmp + i; 436ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 437ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->type = s->type; 438ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->n_chan = s->n_chan; 439ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->subd_flags = s->subdev_flags; 440ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (comedi_get_subdevice_runflags(s) & SRF_RUNNING) 441ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->subd_flags |= SDF_RUNNING; 442ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#define TIMER_nanosec 5 /* backwards compatibility */ 443ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->timer_type = TIMER_nanosec; 444ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->len_chanlist = s->len_chanlist; 445ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->maxdata = s->maxdata; 446ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->range_table) { 447ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->range_type = 448476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman (i << 24) | (0 << 16) | (s->range_table->length); 449ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } else { 450ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->range_type = 0; /* XXX */ 451ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 452ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->flags = s->flags; 453ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 454ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy) 455ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->subd_flags |= SDF_BUSY; 456ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy == file) 457ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->subd_flags |= SDF_BUSY_OWNER; 458ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->lock) 459ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->subd_flags |= SDF_LOCKED; 460ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->lock == file) 461ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->subd_flags |= SDF_LOCK_OWNER; 462ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->maxdata && s->maxdata_list) 463ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->subd_flags |= SDF_MAXDATA; 464ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->flaglist) 465ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->subd_flags |= SDF_FLAGS; 466ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->range_table_list) 467ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->subd_flags |= SDF_RANGETYPE; 468ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->do_cmd) 469ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->subd_flags |= SDF_CMD; 470ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 471ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->insn_bits != &insn_inval) 472ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->insn_bits_support = COMEDI_SUPPORTED; 473ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef else 474ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->insn_bits_support = COMEDI_UNSUPPORTED; 475ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 476ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef us->settling_time_0 = s->settling_time_0; 477ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 478ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 479ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = copy_to_user(arg, tmp, 480bd52efbbcc9f5d70c736b9b73c82aee149da1fe5Bill Pemberton dev->n_subdevices * sizeof(struct comedi_subdinfo)); 481ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 482ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef kfree(tmp); 483ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 484ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return ret ? -EFAULT : 0; 485ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 486ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 487ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 488ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_CHANINFO 489ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef subdevice info ioctl 490ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 491ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 492ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef pointer to chaninfo structure 493ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 494ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 495ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef chaninfo structure at arg 496ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 497ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 498ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arrays at elements of chaninfo structure 499ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 500ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 5010a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_chaninfo_ioctl(struct comedi_device *dev, 50292d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_chaninfo __user *arg) 503ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 50434c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 505a18b416dc11ff9596ebf2012b1d15f485b951b28Bill Pemberton struct comedi_chaninfo it; 506ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 507a18b416dc11ff9596ebf2012b1d15f485b951b28Bill Pemberton if (copy_from_user(&it, arg, sizeof(struct comedi_chaninfo))) 508ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 509ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 510ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (it.subdev >= dev->n_subdevices) 511ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 512ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + it.subdev; 513ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 514ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (it.maxdata_list) { 515ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->maxdata || !s->maxdata_list) 516ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 517ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (copy_to_user(it.maxdata_list, s->maxdata_list, 518790c55415aa31f4c732729f94d2c3a54f7d3bfc2Bill Pemberton s->n_chan * sizeof(unsigned int))) 519ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 520ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 521ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 522ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (it.flaglist) { 523ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->flaglist) 524ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 525ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (copy_to_user(it.flaglist, s->flaglist, 526476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman s->n_chan * sizeof(unsigned int))) 527ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 528ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 529ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 530ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (it.rangelist) { 531ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int i; 532ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 533ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->range_table_list) 534ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 535ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef for (i = 0; i < s->n_chan; i++) { 536ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int x; 537ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 538ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef x = (dev->minor << 28) | (it.subdev << 24) | (i << 16) | 539476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman (s->range_table_list[i]->length); 540ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef put_user(x, it.rangelist + i); 541ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 542476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman#if 0 543476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (copy_to_user(it.rangelist, s->range_type_list, 5440a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral s->n_chan * sizeof(unsigned int))) 545476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman return -EFAULT; 546476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman#endif 547ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 548ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 549ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 550ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 551ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 552ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* 553ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_BUFINFO 554ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef buffer information ioctl 555ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 556ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 557ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef pointer to bufinfo structure 558ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 559ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 560ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bufinfo at arg 561ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 562ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 563ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef modified bufinfo at arg 564ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 565ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef */ 56692d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_bufinfo_ioctl(struct comedi_device *dev, 56753fa827e295d8b09a2446b3126577244644d256dIan Abbott struct comedi_bufinfo __user *arg, void *file) 568ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 5699aa5339ac1eba5268df69bbcdf1abb9fae5afecaBill Pemberton struct comedi_bufinfo bi; 57034c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 571d163679ceec20c50f9aee880fa76c0c1185244a8Bill Pemberton struct comedi_async *async; 572ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 5739aa5339ac1eba5268df69bbcdf1abb9fae5afecaBill Pemberton if (copy_from_user(&bi, arg, sizeof(struct comedi_bufinfo))) 574ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 575ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 576ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (bi.subdevice >= dev->n_subdevices || bi.subdevice < 0) 577ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 578ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 579ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + bi.subdevice; 58053fa827e295d8b09a2446b3126577244644d256dIan Abbott 58153fa827e295d8b09a2446b3126577244644d256dIan Abbott if (s->lock && s->lock != file) 58253fa827e295d8b09a2446b3126577244644d256dIan Abbott return -EACCES; 58353fa827e295d8b09a2446b3126577244644d256dIan Abbott 584ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async = s->async; 585ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 586ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!async) { 587ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("subdevice does not have async capability\n"); 588ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bi.buf_write_ptr = 0; 589ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bi.buf_read_ptr = 0; 590ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bi.buf_write_count = 0; 591ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bi.buf_read_count = 0; 5924772c018e35b6a21e8a8bde54568b59998540a16Ian Abbott bi.bytes_read = 0; 5934772c018e35b6a21e8a8bde54568b59998540a16Ian Abbott bi.bytes_written = 0; 594ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto copyback; 595ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 59653fa827e295d8b09a2446b3126577244644d256dIan Abbott if (!s->busy) { 59753fa827e295d8b09a2446b3126577244644d256dIan Abbott bi.bytes_read = 0; 59853fa827e295d8b09a2446b3126577244644d256dIan Abbott bi.bytes_written = 0; 59953fa827e295d8b09a2446b3126577244644d256dIan Abbott goto copyback_position; 60053fa827e295d8b09a2446b3126577244644d256dIan Abbott } 60153fa827e295d8b09a2446b3126577244644d256dIan Abbott if (s->busy != file) 60253fa827e295d8b09a2446b3126577244644d256dIan Abbott return -EACCES; 603ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 604ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (bi.bytes_read && (s->subdev_flags & SDF_CMD_READ)) { 605ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bi.bytes_read = comedi_buf_read_alloc(async, bi.bytes_read); 606ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_buf_read_free(async, bi.bytes_read); 607ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 608ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!(comedi_get_subdevice_runflags(s) & (SRF_ERROR | 609476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman SRF_RUNNING)) 610476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman && async->buf_write_count == async->buf_read_count) { 611ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef do_become_nonbusy(dev, s); 612ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 613ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 614ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 615ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (bi.bytes_written && (s->subdev_flags & SDF_CMD_WRITE)) { 616ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bi.bytes_written = 617476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_buf_write_alloc(async, bi.bytes_written); 618ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_buf_write_free(async, bi.bytes_written); 619ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 620ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 62153fa827e295d8b09a2446b3126577244644d256dIan Abbottcopyback_position: 622ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bi.buf_write_count = async->buf_write_count; 623ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bi.buf_write_ptr = async->buf_write_ptr; 624ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bi.buf_read_count = async->buf_read_count; 625ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef bi.buf_read_ptr = async->buf_read_ptr; 626ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 627476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmancopyback: 6289aa5339ac1eba5268df69bbcdf1abb9fae5afecaBill Pemberton if (copy_to_user(arg, &bi, sizeof(struct comedi_bufinfo))) 629ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 630ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 631ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 632ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 633ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 6340a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int parse_insn(struct comedi_device *dev, struct comedi_insn *insn, 6350a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral unsigned int *data, void *file); 636ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 63720617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * COMEDI_INSNLIST 63820617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * synchronous instructions 639ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * 64020617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * arg: 64120617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * pointer to sync cmd structure 642ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * 64320617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * reads: 64420617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * sync cmd struct at arg 64520617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * instruction list 64620617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * data (for writes) 647ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * 64820617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * writes: 64920617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * data (for reads) 650ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef */ 651ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* arbitrary limits */ 652ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#define MAX_SAMPLES 256 65392d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_insnlist_ioctl(struct comedi_device *dev, 65492d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_insnlist __user *arg, void *file) 655ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 656da613f4fabb43b8bc551bb874792e1f22a698696Bill Pemberton struct comedi_insnlist insnlist; 65790035c0886b256d75bced13b3b3cea5234aff136Bill Pemberton struct comedi_insn *insns = NULL; 658790c55415aa31f4c732729f94d2c3a54f7d3bfc2Bill Pemberton unsigned int *data = NULL; 659ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int i = 0; 660ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int ret = 0; 661ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 662da613f4fabb43b8bc551bb874792e1f22a698696Bill Pemberton if (copy_from_user(&insnlist, arg, sizeof(struct comedi_insnlist))) 663ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 664ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 665790c55415aa31f4c732729f94d2c3a54f7d3bfc2Bill Pemberton data = kmalloc(sizeof(unsigned int) * MAX_SAMPLES, GFP_KERNEL); 666ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!data) { 667ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("kmalloc failed\n"); 668ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -ENOMEM; 669ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 670ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 671ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 6720a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral insns = 6730a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral kmalloc(sizeof(struct comedi_insn) * insnlist.n_insns, GFP_KERNEL); 674ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!insns) { 675ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("kmalloc failed\n"); 676ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -ENOMEM; 677ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 678ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 679ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 680ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (copy_from_user(insns, insnlist.insns, 68190035c0886b256d75bced13b3b3cea5234aff136Bill Pemberton sizeof(struct comedi_insn) * insnlist.n_insns)) { 682ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("copy_from_user failed\n"); 683ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EFAULT; 684ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 685ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 686ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 687ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef for (i = 0; i < insnlist.n_insns; i++) { 688ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insns[i].n > MAX_SAMPLES) { 689ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("number of samples too large\n"); 690ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 691ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 692ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 693ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insns[i].insn & INSN_MASK_WRITE) { 694ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (copy_from_user(data, insns[i].data, 695790c55415aa31f4c732729f94d2c3a54f7d3bfc2Bill Pemberton insns[i].n * sizeof(unsigned int))) { 696ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("copy_from_user failed\n"); 697ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EFAULT; 698ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 699ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 700ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 701ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = parse_insn(dev, insns + i, data, file); 702ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (ret < 0) 703ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 704ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insns[i].insn & INSN_MASK_READ) { 705ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (copy_to_user(insns[i].data, data, 706790c55415aa31f4c732729f94d2c3a54f7d3bfc2Bill Pemberton insns[i].n * sizeof(unsigned int))) { 707ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("copy_to_user failed\n"); 708ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EFAULT; 709ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 710ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 711ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 712ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (need_resched()) 713ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef schedule(); 714ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 715ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 716476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmanerror: 717476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman kfree(insns); 718476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman kfree(data); 719ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 720ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (ret < 0) 721ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return ret; 722ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return i; 723ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 724ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 7250a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int check_insn_config_length(struct comedi_insn *insn, 7260a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral unsigned int *data) 727ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 728476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (insn->n < 1) 729476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman return -EINVAL; 730ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 731ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef switch (data[0]) { 732ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_DIO_OUTPUT: 733ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_DIO_INPUT: 734ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_DISARM: 735ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_RESET: 736ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->n == 1) 737ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 738ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 739ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_ARM: 740ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_DIO_QUERY: 741ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_BLOCK_SIZE: 742ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_FILTER: 743ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_SERIAL_CLOCK: 744ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_BIDIRECTIONAL_DATA: 745ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_ALT_SOURCE: 746ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_SET_COUNTER_MODE: 747ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_8254_READ_STATUS: 748ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_SET_ROUTING: 749ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_GET_ROUTING: 750ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_GET_PWM_STATUS: 751ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_PWM_SET_PERIOD: 752ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_PWM_GET_PERIOD: 753ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->n == 2) 754ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 755ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 756ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_SET_GATE_SRC: 757ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_GET_GATE_SRC: 758ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_SET_CLOCK_SRC: 759ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_GET_CLOCK_SRC: 760ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_SET_OTHER_SRC: 761ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_GET_COUNTER_STATUS: 762ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_PWM_SET_H_BRIDGE: 763ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_PWM_GET_H_BRIDGE: 764ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_GET_HARDWARE_BUFFER_SIZE: 765ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->n == 3) 766ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 767ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 768ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_PWM_OUTPUT: 769ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG_ANALOG_TRIG: 770ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->n == 5) 771ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 772ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 7730a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral /* by default we allow the insn since we don't have checks for 7740a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral * all possible cases yet */ 775ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef default: 7763fffdf2045d0dbca3833f8f54ae41ce5f2c0b8faMark Rankilor printk(KERN_WARNING 7773fffdf2045d0dbca3833f8f54ae41ce5f2c0b8faMark Rankilor "comedi: no check for data length of config insn id " 7780a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral "%i is implemented.\n" 7790a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral " Add a check to %s in %s.\n" 7800a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral " Assuming n=%i is correct.\n", data[0], __func__, 7810a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral __FILE__, insn->n); 782ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 783ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 784ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 785ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 786ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 787ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 7880a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int parse_insn(struct comedi_device *dev, struct comedi_insn *insn, 7890a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral unsigned int *data, void *file) 790ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 79134c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 792ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int ret = 0; 793ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int i; 794ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 795ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->insn & INSN_MASK_SPECIAL) { 796ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* a non-subdevice instruction */ 797ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 798ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef switch (insn->insn) { 799ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_GTOD: 800ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef { 801ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef struct timeval tv; 802ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 803ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->n != 2) { 804ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 805ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 806ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 807ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 808ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef do_gettimeofday(&tv); 809ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef data[0] = tv.tv_sec; 810ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef data[1] = tv.tv_usec; 811ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = 2; 812ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 813ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 814ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 815ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_WAIT: 816ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->n != 1 || data[0] >= 100000) { 817ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 818ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 819ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 820ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef udelay(data[0] / 1000); 821ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = 1; 822ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 823ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_INTTRIG: 824ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->n != 1) { 825ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 826ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 827ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 828ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->subdev >= dev->n_subdevices) { 829ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("%d not usable subdevice\n", 830ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef insn->subdev); 831ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 832ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 833ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 834ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + insn->subdev; 835ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->async) { 836ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("no async\n"); 837ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 838ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 839ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 840ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->async->inttrig) { 841ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("no inttrig\n"); 842ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EAGAIN; 843ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 844ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 845ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = s->async->inttrig(dev, s, insn->data[0]); 846ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (ret >= 0) 847ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = 1; 848ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 849ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef default: 850ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("invalid insn\n"); 851ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 852ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 853ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 854ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } else { 855ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* a subdevice instruction */ 856790c55415aa31f4c732729f94d2c3a54f7d3bfc2Bill Pemberton unsigned int maxdata; 857ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 858ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->subdev >= dev->n_subdevices) { 859ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("subdevice %d out of range\n", insn->subdev); 860ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 861ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto out; 862ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 863ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + insn->subdev; 864ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 865ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->type == COMEDI_SUBD_UNUSED) { 866ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("%d not usable subdevice\n", insn->subdev); 867ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EIO; 868ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto out; 869ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 870ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 871ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* are we locked? (ioctl lock) */ 872ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->lock && s->lock != file) { 873ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("device locked\n"); 874ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EACCES; 875ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto out; 876ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 877ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 8780fd0ca75fd9eb0e9cde49c28ad227c2d8d049366Greg Kroah-Hartman ret = comedi_check_chanlist(s, 1, &insn->chanspec); 879476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (ret < 0) { 880ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 881ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("bad chanspec\n"); 882ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto out; 883ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 884ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 885ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy) { 886ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EBUSY; 887ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto out; 888ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 889ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* This looks arbitrary. It is. */ 890ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->busy = &parse_insn; 891ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef switch (insn->insn) { 892ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_READ: 893ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = s->insn_read(dev, s, insn, data); 894ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 895ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_WRITE: 896ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef maxdata = s->maxdata_list 897476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman ? s->maxdata_list[CR_CHAN(insn->chanspec)] 898476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman : s->maxdata; 899ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef for (i = 0; i < insn->n; ++i) { 900ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (data[i] > maxdata) { 901ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 902ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("bad data value(s)\n"); 903ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 904ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 905ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 906ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (ret == 0) 907ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = s->insn_write(dev, s, insn, data); 908ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 909ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_BITS: 910ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn->n != 2) { 911ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 912ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 913ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 914ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = s->insn_bits(dev, s, insn, data); 915ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 916ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef case INSN_CONFIG: 917ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = check_insn_config_length(insn, data); 918ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (ret) 919ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 920ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = s->insn_config(dev, s, insn, data); 921ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 922ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef default: 923ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 924ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 925ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 926ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 927ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->busy = NULL; 928ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 929ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 930476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmanout: 931ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return ret; 932ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 933ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 934ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 93520617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * COMEDI_INSN 93620617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * synchronous instructions 937ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * 93820617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * arg: 93920617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * pointer to insn 940ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * 94120617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * reads: 94220617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * struct comedi_insn struct at arg 94320617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * data (for writes) 944ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * 94520617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * writes: 94620617f22b006e12b81602d80d85f8f3f7efdef45Pieter De Praetere * data (for reads) 947ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef */ 94892d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_insn_ioctl(struct comedi_device *dev, 94992d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_insn __user *arg, void *file) 950ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 95190035c0886b256d75bced13b3b3cea5234aff136Bill Pemberton struct comedi_insn insn; 952790c55415aa31f4c732729f94d2c3a54f7d3bfc2Bill Pemberton unsigned int *data = NULL; 953ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int ret = 0; 954ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 955790c55415aa31f4c732729f94d2c3a54f7d3bfc2Bill Pemberton data = kmalloc(sizeof(unsigned int) * MAX_SAMPLES, GFP_KERNEL); 956ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!data) { 957ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -ENOMEM; 958ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 959ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 960ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 96190035c0886b256d75bced13b3b3cea5234aff136Bill Pemberton if (copy_from_user(&insn, arg, sizeof(struct comedi_insn))) { 962ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EFAULT; 963ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 964ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 965ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 966ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* This is where the behavior of insn and insnlist deviate. */ 967ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn.n > MAX_SAMPLES) 968ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef insn.n = MAX_SAMPLES; 969ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn.insn & INSN_MASK_WRITE) { 97021fe2eea6381845956322e63e441f351774de7f9Mark if (copy_from_user(data, 97121fe2eea6381845956322e63e441f351774de7f9Mark insn.data, 97221fe2eea6381845956322e63e441f351774de7f9Mark insn.n * sizeof(unsigned int))) { 973ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EFAULT; 974ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 975ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 976ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 977ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = parse_insn(dev, &insn, data, file); 978ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (ret < 0) 979ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 980ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (insn.insn & INSN_MASK_READ) { 98121fe2eea6381845956322e63e441f351774de7f9Mark if (copy_to_user(insn.data, 98221fe2eea6381845956322e63e441f351774de7f9Mark data, 98321fe2eea6381845956322e63e441f351774de7f9Mark insn.n * sizeof(unsigned int))) { 984ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EFAULT; 985ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto error; 986ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 987ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 988ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = insn.n; 989ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 990476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmanerror: 991476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman kfree(data); 992ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 993ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return ret; 994ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 995ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 996181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartmanstatic void comedi_set_subdevice_runflags(struct comedi_subdevice *s, 997181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartman unsigned mask, unsigned bits) 998181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartman{ 999181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartman unsigned long flags; 1000181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartman 1001181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartman spin_lock_irqsave(&s->spin_lock, flags); 1002181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartman s->runflags &= ~mask; 1003181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartman s->runflags |= (bits & mask); 1004181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartman spin_unlock_irqrestore(&s->spin_lock, flags); 1005181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartman} 1006181bd67bf5780b941f2cba6247ed1c0cdfce468aGreg Kroah-Hartman 100792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_cmd_ioctl(struct comedi_device *dev, 100892d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_cmd __user *cmd, void *file) 1009ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1010ea6d0d4cab4f4f2d6a88f3bce4707fe92696fd3fBill Pemberton struct comedi_cmd user_cmd; 101134c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 1012d163679ceec20c50f9aee880fa76c0c1185244a8Bill Pemberton struct comedi_async *async; 1013ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int ret = 0; 101492d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman unsigned int __user *chanlist_saver = NULL; 1015ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 101692d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman if (copy_from_user(&user_cmd, cmd, sizeof(struct comedi_cmd))) { 1017ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("bad cmd address\n"); 1018ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 1019ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1020476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman /* save user's chanlist pointer so it can be restored later */ 1021ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef chanlist_saver = user_cmd.chanlist; 1022ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1023ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (user_cmd.subdev >= dev->n_subdevices) { 1024ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("%d no such subdevice\n", user_cmd.subdev); 1025ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -ENODEV; 1026ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1027ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1028ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + user_cmd.subdev; 1029ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async = s->async; 1030ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1031ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->type == COMEDI_SUBD_UNUSED) { 1032ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("%d not valid subdevice\n", user_cmd.subdev); 1033ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EIO; 1034ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1035ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1036ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->do_cmd || !s->do_cmdtest || !s->async) { 1037ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("subdevice %i does not support commands\n", 1038ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef user_cmd.subdev); 1039ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EIO; 1040ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1041ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1042ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* are we locked? (ioctl lock) */ 1043ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->lock && s->lock != file) { 1044ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("subdevice locked\n"); 1045ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EACCES; 1046ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1047ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1048ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* are we busy? */ 1049ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy) { 1050ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("subdevice busy\n"); 1051ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EBUSY; 1052ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1053ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->busy = file; 1054ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1055ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* make sure channel/gain list isn't too long */ 1056ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (user_cmd.chanlist_len > s->len_chanlist) { 1057ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("channel/gain list too long %u > %d\n", 1058ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef user_cmd.chanlist_len, s->len_chanlist); 1059ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 1060ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1061ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1062ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1063ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* make sure channel/gain list isn't too short */ 1064ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (user_cmd.chanlist_len < 1) { 1065ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("channel/gain list too short %u < 1\n", 1066ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef user_cmd.chanlist_len); 1067ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 1068ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1069ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1070ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1071476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman kfree(async->cmd.chanlist); 1072ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async->cmd = user_cmd; 1073ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async->cmd.data = NULL; 1074ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* load channel/gain list */ 1075ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async->cmd.chanlist = 1076476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman kmalloc(async->cmd.chanlist_len * sizeof(int), GFP_KERNEL); 1077ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!async->cmd.chanlist) { 1078ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("allocation failed\n"); 1079ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -ENOMEM; 1080ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1081ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1082ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1083ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (copy_from_user(async->cmd.chanlist, user_cmd.chanlist, 1084476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman async->cmd.chanlist_len * sizeof(int))) { 1085ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("fault reading chanlist\n"); 1086ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EFAULT; 1087ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1088ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1089ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1090ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* make sure each element in channel/gain list is valid */ 109121fe2eea6381845956322e63e441f351774de7f9Mark ret = comedi_check_chanlist(s, 109221fe2eea6381845956322e63e441f351774de7f9Mark async->cmd.chanlist_len, 109321fe2eea6381845956322e63e441f351774de7f9Mark async->cmd.chanlist); 1094476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (ret < 0) { 1095ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("bad chanlist\n"); 1096ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1097ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1098ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1099ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = s->do_cmdtest(dev, s, &async->cmd); 1100ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1101ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (async->cmd.flags & TRIG_BOGUS || ret) { 1102ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("test returned %d\n", ret); 1103ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef user_cmd = async->cmd; 1104476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman /* restore chanlist pointer before copying back */ 1105ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef user_cmd.chanlist = chanlist_saver; 1106ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef user_cmd.data = NULL; 110792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman if (copy_to_user(cmd, &user_cmd, sizeof(struct comedi_cmd))) { 1108ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("fault writing cmd\n"); 1109ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EFAULT; 1110ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1111ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1112ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EAGAIN; 1113ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1114ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1115ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1116ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!async->prealloc_bufsz) { 1117ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -ENOMEM; 1118ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("no buffer (?)\n"); 1119ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1120ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1121ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1122ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_reset_async_buf(async); 1123ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1124ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async->cb_mask = 1125476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman COMEDI_CB_EOA | COMEDI_CB_BLOCK | COMEDI_CB_ERROR | 1126476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman COMEDI_CB_OVERFLOW; 1127476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (async->cmd.flags & TRIG_WAKE_EOS) 1128ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async->cb_mask |= COMEDI_CB_EOS; 1129ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1130ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_set_subdevice_runflags(s, ~0, SRF_USER | SRF_RUNNING); 1131ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1132ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = s->do_cmd(dev, s); 1133ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (ret == 0) 1134ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 1135ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1136476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmancleanup: 1137ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef do_become_nonbusy(dev, s); 1138ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1139ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return ret; 1140ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1141ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1142ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 1143ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_CMDTEST 1144ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef command testing ioctl 1145ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1146ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 1147ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef pointer to cmd structure 1148ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1149ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 1150ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef cmd structure at arg 1151ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef channel/range list 1152ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1153ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 1154ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef modified cmd structure at arg 1155ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1156ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 115792d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic int do_cmdtest_ioctl(struct comedi_device *dev, 115892d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman struct comedi_cmd __user *arg, void *file) 1159ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1160ea6d0d4cab4f4f2d6a88f3bce4707fe92696fd3fBill Pemberton struct comedi_cmd user_cmd; 116134c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 1162ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int ret = 0; 1163ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned int *chanlist = NULL; 116492d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman unsigned int __user *chanlist_saver = NULL; 1165ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1166ea6d0d4cab4f4f2d6a88f3bce4707fe92696fd3fBill Pemberton if (copy_from_user(&user_cmd, arg, sizeof(struct comedi_cmd))) { 1167ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("bad cmd address\n"); 1168ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EFAULT; 1169ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1170476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman /* save user's chanlist pointer so it can be restored later */ 1171ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef chanlist_saver = user_cmd.chanlist; 1172ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1173ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (user_cmd.subdev >= dev->n_subdevices) { 1174ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("%d no such subdevice\n", user_cmd.subdev); 1175ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -ENODEV; 1176ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1177ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1178ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + user_cmd.subdev; 1179ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->type == COMEDI_SUBD_UNUSED) { 1180ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("%d not valid subdevice\n", user_cmd.subdev); 1181ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EIO; 1182ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1183ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1184ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->do_cmd || !s->do_cmdtest) { 1185ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("subdevice %i does not support commands\n", 1186ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef user_cmd.subdev); 1187ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EIO; 1188ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1189ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1190ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* make sure channel/gain list isn't too long */ 1191ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (user_cmd.chanlist_len > s->len_chanlist) { 1192ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("channel/gain list too long %d > %d\n", 1193ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef user_cmd.chanlist_len, s->len_chanlist); 1194ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EINVAL; 1195ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1196ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1197ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1198ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* load channel/gain list */ 1199ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (user_cmd.chanlist) { 1200ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef chanlist = 1201476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman kmalloc(user_cmd.chanlist_len * sizeof(int), GFP_KERNEL); 1202ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!chanlist) { 1203ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("allocation failed\n"); 1204ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -ENOMEM; 1205ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1206ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1207ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1208ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (copy_from_user(chanlist, user_cmd.chanlist, 1209476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman user_cmd.chanlist_len * sizeof(int))) { 1210ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("fault reading chanlist\n"); 1211ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EFAULT; 1212ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1213ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1214ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1215ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* make sure each element in channel/gain list is valid */ 12160fd0ca75fd9eb0e9cde49c28ad227c2d8d049366Greg Kroah-Hartman ret = comedi_check_chanlist(s, user_cmd.chanlist_len, chanlist); 1217476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (ret < 0) { 1218ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("bad chanlist\n"); 1219ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1220ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1221ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1222ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef user_cmd.chanlist = chanlist; 1223ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1224ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1225ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = s->do_cmdtest(dev, s, &user_cmd); 1226ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1227476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman /* restore chanlist pointer before copying back */ 1228ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef user_cmd.chanlist = chanlist_saver; 1229ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1230ea6d0d4cab4f4f2d6a88f3bce4707fe92696fd3fBill Pemberton if (copy_to_user(arg, &user_cmd, sizeof(struct comedi_cmd))) { 1231ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("bad cmd address\n"); 1232ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EFAULT; 1233ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto cleanup; 1234ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1235476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmancleanup: 1236476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman kfree(chanlist); 1237ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1238ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return ret; 1239ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1240ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1241ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 1242ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_LOCK 1243ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef lock subdevice 1244ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1245ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 1246ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef subdevice number 1247ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1248ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 1249ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef none 1250ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1251ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 1252ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef none 1253ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1254ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 1255ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 12560a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_lock_ioctl(struct comedi_device *dev, unsigned int arg, 12570a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral void *file) 1258ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1259ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int ret = 0; 1260ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned long flags; 126134c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 1262ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1263ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (arg >= dev->n_subdevices) 1264ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 1265ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + arg; 1266ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 12675f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_lock_irqsave(&s->spin_lock, flags); 1268476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (s->busy || s->lock) 1269ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = -EBUSY; 1270476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman else 1271ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->lock = file; 12725f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_unlock_irqrestore(&s->spin_lock, flags); 1273ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1274ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (ret < 0) 1275ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return ret; 1276ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1277ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#if 0 1278ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->lock_f) 1279ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = s->lock_f(dev, s); 1280ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#endif 1281ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1282ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return ret; 1283ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1284ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1285ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 1286ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_UNLOCK 1287ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unlock subdevice 1288ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1289ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 1290ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef subdevice number 1291ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1292ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 1293ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef none 1294ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1295ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 1296ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef none 1297ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1298ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef This function isn't protected by the semaphore, since 1299ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef we already own the lock. 1300ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 13010a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_unlock_ioctl(struct comedi_device *dev, unsigned int arg, 13020a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral void *file) 1303ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 130434c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 1305ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1306ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (arg >= dev->n_subdevices) 1307ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 1308ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + arg; 1309ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1310ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy) 1311ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EBUSY; 1312ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1313ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->lock && s->lock != file) 1314ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EACCES; 1315ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1316ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->lock == file) { 1317ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#if 0 1318ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->unlock) 1319ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->unlock(dev, s); 1320ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#endif 1321ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1322ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->lock = NULL; 1323ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1324ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1325ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 1326ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1327ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1328ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 1329ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_CANCEL 1330ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef cancel acquisition ioctl 1331ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1332ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 1333ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef subdevice number 1334ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1335ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 1336ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef nothing 1337ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1338ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 1339ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef nothing 1340ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1341ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 13420a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_cancel_ioctl(struct comedi_device *dev, unsigned int arg, 13430a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral void *file) 1344ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 134534c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 1346ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1347ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (arg >= dev->n_subdevices) 1348ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 1349ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + arg; 1350ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->async == NULL) 1351ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 1352ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1353ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->lock && s->lock != file) 1354ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EACCES; 1355ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1356ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->busy) 1357ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 1358ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1359ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy != file) 1360ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EBUSY; 1361ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1362ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return do_cancel(dev, s); 1363ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1364ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1365ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 1366ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef COMEDI_POLL ioctl 1367ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef instructs driver to synchronize buffers 1368ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1369ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef arg: 1370ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef subdevice number 1371ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1372ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef reads: 1373ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef nothing 1374ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1375ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef writes: 1376ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef nothing 1377ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1378ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef*/ 13790a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic int do_poll_ioctl(struct comedi_device *dev, unsigned int arg, 13800a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral void *file) 1381ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 138234c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 1383ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1384ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (arg >= dev->n_subdevices) 1385ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 1386ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + arg; 1387ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1388ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->lock && s->lock != file) 1389ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EACCES; 1390ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1391ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->busy) 1392ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 1393ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1394ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy != file) 1395ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EBUSY; 1396ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1397ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->poll) 1398ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return s->poll(dev, s); 1399ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1400ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EINVAL; 1401ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1402ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 140334c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pembertonstatic int do_cancel(struct comedi_device *dev, struct comedi_subdevice *s) 1404ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1405ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int ret = 0; 1406ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1407ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if ((comedi_get_subdevice_runflags(s) & SRF_RUNNING) && s->cancel) 1408ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef ret = s->cancel(dev, s); 1409ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1410ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef do_become_nonbusy(dev, s); 1411ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1412ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return ret; 1413ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1414ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 141592d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic void comedi_unmap(struct vm_area_struct *area) 1416ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1417d163679ceec20c50f9aee880fa76c0c1185244a8Bill Pemberton struct comedi_async *async; 141871b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton struct comedi_device *dev; 1419ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1420ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async = area->vm_private_data; 1421ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef dev = async->subdevice->device; 1422ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1423ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_lock(&dev->mutex); 1424ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async->mmap_count--; 1425ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 1426ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1427ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1428ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic struct vm_operations_struct comedi_vm_ops = { 14290a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .close = comedi_unmap, 1430ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef}; 1431ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1432ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic int comedi_mmap(struct file *file, struct vm_area_struct *vma) 1433ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1434ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef const unsigned minor = iminor(file->f_dentry->d_inode); 1435476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman struct comedi_device_file_info *dev_file_info = 1436476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_device_file_info(minor); 143771b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton struct comedi_device *dev = dev_file_info->device; 1438d163679ceec20c50f9aee880fa76c0c1185244a8Bill Pemberton struct comedi_async *async = NULL; 1439ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned long start = vma->vm_start; 1440ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned long size; 1441ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int n_pages; 1442ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int i; 1443ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int retval; 144434c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 1445ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1446ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_lock(&dev->mutex); 1447ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!dev->attached) { 1448ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("no driver configured on comedi%i\n", dev->minor); 1449ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -ENODEV; 1450ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1451ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1452476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (vma->vm_flags & VM_WRITE) 1453ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = comedi_get_write_subdevice(dev_file_info); 1454476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman else 1455ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = comedi_get_read_subdevice(dev_file_info); 1456476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman 1457ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s == NULL) { 1458ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EINVAL; 1459ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1460ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1461ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async = s->async; 1462ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (async == NULL) { 1463ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EINVAL; 1464ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1465ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1466ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1467ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (vma->vm_pgoff != 0) { 1468ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("comedi: mmap() offset must be 0.\n"); 1469ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EINVAL; 1470ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1471ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1472ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1473ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef size = vma->vm_end - vma->vm_start; 1474ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (size > async->prealloc_bufsz) { 1475ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EFAULT; 1476ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1477ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1478ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (size & (~PAGE_MASK)) { 1479ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EFAULT; 1480ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1481ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1482ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1483ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef n_pages = size >> PAGE_SHIFT; 1484ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef for (i = 0; i < n_pages; ++i) { 1485ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (remap_pfn_range(vma, start, 14860a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral page_to_pfn(virt_to_page 14870a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral (async->buf_page_list 14880a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral [i].virt_addr)), PAGE_SIZE, 14890a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral PAGE_SHARED)) { 1490ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EAGAIN; 1491ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1492ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1493ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef start += PAGE_SIZE; 1494ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1495ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1496ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef vma->vm_ops = &comedi_vm_ops; 1497ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef vma->vm_private_data = async; 1498ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1499ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async->mmap_count++; 1500ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1501ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = 0; 1502476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmandone: 1503ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 1504ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return retval; 1505ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1506ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 15070a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukralstatic unsigned int comedi_poll(struct file *file, poll_table * wait) 1508ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1509ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned int mask = 0; 1510ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef const unsigned minor = iminor(file->f_dentry->d_inode); 1511476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman struct comedi_device_file_info *dev_file_info = 1512476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_device_file_info(minor); 151371b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton struct comedi_device *dev = dev_file_info->device; 151434c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *read_subdev; 151534c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *write_subdev; 1516ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1517ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_lock(&dev->mutex); 1518ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!dev->attached) { 1519ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("no driver configured on comedi%i\n", dev->minor); 1520ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 1521ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 1522ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1523ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1524ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mask = 0; 1525ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef read_subdev = comedi_get_read_subdevice(dev_file_info); 1526ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (read_subdev) { 1527ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef poll_wait(file, &read_subdev->async->wait_head, wait); 1528ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!read_subdev->busy 1529476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman || comedi_buf_read_n_available(read_subdev->async) > 0 1530476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman || !(comedi_get_subdevice_runflags(read_subdev) & 1531476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman SRF_RUNNING)) { 1532ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mask |= POLLIN | POLLRDNORM; 1533ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1534ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1535ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef write_subdev = comedi_get_write_subdevice(dev_file_info); 1536ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (write_subdev) { 1537ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef poll_wait(file, &write_subdev->async->wait_head, wait); 1538476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_buf_write_alloc(write_subdev->async, 1539476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman write_subdev->async->prealloc_bufsz); 1540ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!write_subdev->busy 1541476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman || !(comedi_get_subdevice_runflags(write_subdev) & 1542476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman SRF_RUNNING) 1543476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman || comedi_buf_write_n_allocated(write_subdev->async) >= 1544476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman bytes_per_sample(write_subdev->async->subdevice)) { 1545ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mask |= POLLOUT | POLLWRNORM; 1546ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1547ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1548ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1549ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 1550ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return mask; 1551ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1552ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 155392d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic ssize_t comedi_write(struct file *file, const char __user *buf, 155492d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartman size_t nbytes, loff_t *offset) 1555ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 155634c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 1557d163679ceec20c50f9aee880fa76c0c1185244a8Bill Pemberton struct comedi_async *async; 1558ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int n, m, count = 0, retval = 0; 1559ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DECLARE_WAITQUEUE(wait, current); 1560ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef const unsigned minor = iminor(file->f_dentry->d_inode); 1561476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman struct comedi_device_file_info *dev_file_info = 1562476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_device_file_info(minor); 156371b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton struct comedi_device *dev = dev_file_info->device; 1564ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1565ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!dev->attached) { 1566ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("no driver configured on comedi%i\n", dev->minor); 1567ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -ENODEV; 1568ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1569ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1570ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1571ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = comedi_get_write_subdevice(dev_file_info); 1572ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s == NULL) { 1573ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EIO; 1574ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1575ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1576ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async = s->async; 1577ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1578ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!nbytes) { 1579ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = 0; 1580ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1581ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1582ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->busy) { 1583ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = 0; 1584ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1585ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1586ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy != file) { 1587ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EACCES; 1588ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1589ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1590ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef add_wait_queue(&async->wait_head, &wait); 1591ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef while (nbytes > 0 && !retval) { 1592ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef set_current_state(TASK_INTERRUPTIBLE); 1593ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1594d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott if (!(comedi_get_subdevice_runflags(s) & SRF_RUNNING)) { 1595d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott if (count == 0) { 1596d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott if (comedi_get_subdevice_runflags(s) & 1597d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott SRF_ERROR) { 1598d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott retval = -EPIPE; 1599d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott } else { 1600d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott retval = 0; 1601d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott } 1602d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott do_become_nonbusy(dev, s); 1603d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott } 1604d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott break; 1605d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott } 1606d261154057c27f6c1d256b6198b0ad08733f1758Ian Abbott 1607ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef n = nbytes; 1608ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1609ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef m = n; 1610476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (async->buf_write_ptr + m > async->prealloc_bufsz) 1611ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef m = async->prealloc_bufsz - async->buf_write_ptr; 1612ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_buf_write_alloc(async, async->prealloc_bufsz); 1613476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (m > comedi_buf_write_n_allocated(async)) 1614ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef m = comedi_buf_write_n_allocated(async); 1615ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (m < n) 1616ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef n = m; 1617ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1618ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (n == 0) { 1619ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (file->f_flags & O_NONBLOCK) { 1620ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EAGAIN; 1621ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 1622ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1623ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (signal_pending(current)) { 1624ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -ERESTARTSYS; 1625ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 1626ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1627ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef schedule(); 1628476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (!s->busy) 1629ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 1630ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy != file) { 1631ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EACCES; 1632ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 1633ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1634ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef continue; 1635ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1636ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1637ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef m = copy_from_user(async->prealloc_buf + async->buf_write_ptr, 1638476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman buf, n); 1639ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (m) { 1640ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef n -= m; 1641ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EFAULT; 1642ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1643ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_buf_write_free(async, n); 1644ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1645ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef count += n; 1646ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef nbytes -= n; 1647ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1648ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef buf += n; 1649ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; /* makes device work like a pipe */ 1650ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1651ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef set_current_state(TASK_RUNNING); 1652ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef remove_wait_queue(&async->wait_head, &wait); 1653ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1654ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefdone: 1655476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman return count ? count : retval; 1656ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1657ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 165892d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic ssize_t comedi_read(struct file *file, char __user *buf, size_t nbytes, 16596705b68d0be284e2f9949f3657ea65d426d0f988Andrea Gelmini loff_t *offset) 1660ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 166134c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 1662d163679ceec20c50f9aee880fa76c0c1185244a8Bill Pemberton struct comedi_async *async; 1663ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int n, m, count = 0, retval = 0; 1664ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DECLARE_WAITQUEUE(wait, current); 1665ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef const unsigned minor = iminor(file->f_dentry->d_inode); 1666476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman struct comedi_device_file_info *dev_file_info = 1667476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_device_file_info(minor); 166871b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton struct comedi_device *dev = dev_file_info->device; 1669ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1670ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!dev->attached) { 1671ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("no driver configured on comedi%i\n", dev->minor); 1672ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -ENODEV; 1673ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1674ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1675ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1676ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = comedi_get_read_subdevice(dev_file_info); 1677ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s == NULL) { 1678ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EIO; 1679ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1680ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1681ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async = s->async; 1682ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!nbytes) { 1683ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = 0; 1684ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1685ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1686ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->busy) { 1687ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = 0; 1688ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1689ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1690ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy != file) { 1691ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EACCES; 1692ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto done; 1693ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1694ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1695ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef add_wait_queue(&async->wait_head, &wait); 1696ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef while (nbytes > 0 && !retval) { 1697ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef set_current_state(TASK_INTERRUPTIBLE); 1698ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1699ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef n = nbytes; 1700ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1701ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef m = comedi_buf_read_n_available(async); 1702476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman /* printk("%d available\n",m); */ 1703476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (async->buf_read_ptr + m > async->prealloc_bufsz) 1704ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef m = async->prealloc_bufsz - async->buf_read_ptr; 1705476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman /* printk("%d contiguous\n",m); */ 1706ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (m < n) 1707ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef n = m; 1708ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1709ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (n == 0) { 1710ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!(comedi_get_subdevice_runflags(s) & SRF_RUNNING)) { 1711ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef do_become_nonbusy(dev, s); 1712ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (comedi_get_subdevice_runflags(s) & 1713476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman SRF_ERROR) { 1714ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EPIPE; 1715ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } else { 1716ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = 0; 1717ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1718ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 1719ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1720ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (file->f_flags & O_NONBLOCK) { 1721ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EAGAIN; 1722ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 1723ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1724ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (signal_pending(current)) { 1725ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -ERESTARTSYS; 1726ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 1727ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1728ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef schedule(); 1729ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!s->busy) { 1730ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = 0; 1731ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 1732ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1733ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy != file) { 1734ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EACCES; 1735ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 1736ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1737ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef continue; 1738ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1739ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef m = copy_to_user(buf, async->prealloc_buf + 1740476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman async->buf_read_ptr, n); 1741ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (m) { 1742ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef n -= m; 1743ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = -EFAULT; 1744ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1745ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1746ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_buf_read_alloc(async, n); 1747ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_buf_read_free(async, n); 1748ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1749ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef count += n; 1750ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef nbytes -= n; 1751ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1752ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef buf += n; 1753ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; /* makes device work like a pipe */ 1754ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1755ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!(comedi_get_subdevice_runflags(s) & (SRF_ERROR | SRF_RUNNING)) && 1756476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman async->buf_read_count - async->buf_write_count == 0) { 1757ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef do_become_nonbusy(dev, s); 1758ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1759ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef set_current_state(TASK_RUNNING); 1760ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef remove_wait_queue(&async->wait_head, &wait); 1761ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1762ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefdone: 1763476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman return count ? count : retval; 1764ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1765ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1766ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef/* 1767ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef This function restores a subdevice to an idle state. 1768ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef */ 176934c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pembertonvoid do_become_nonbusy(struct comedi_device *dev, struct comedi_subdevice *s) 1770ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1771d163679ceec20c50f9aee880fa76c0c1185244a8Bill Pemberton struct comedi_async *async = s->async; 1772ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1773ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_set_subdevice_runflags(s, SRF_RUNNING, 0); 1774ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (async) { 1775ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_reset_async_buf(async); 1776ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async->inttrig = NULL; 1777ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } else { 1778476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman printk(KERN_ERR 1779476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman "BUG: (?) do_become_nonbusy called with async=0\n"); 1780ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1781ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1782ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->busy = NULL; 1783ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1784ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1785ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic int comedi_open(struct inode *inode, struct file *file) 1786ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1787ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef const unsigned minor = iminor(inode); 1788476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman struct comedi_device_file_info *dev_file_info = 1789476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_device_file_info(minor); 17900a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral struct comedi_device *dev = 17910a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral dev_file_info ? dev_file_info->device : NULL; 1792979200719d35934367bbf97d9b7d22d5b5281ddaIan Abbott 1793ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (dev == NULL) { 1794ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("invalid minor number\n"); 1795ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -ENODEV; 1796ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1797ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1798ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* This is slightly hacky, but we want module autoloading 1799ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * to work for root. 1800ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * case: user opens device, attached -> ok 1801ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * case: user opens device, unattached, in_request_module=0 -> autoload 1802ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * case: user opens device, unattached, in_request_module=1 -> fail 1803ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * case: root opens device, attached -> ok 1804ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * case: root opens device, unattached, in_request_module=1 -> ok 1805ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * (typically called from modprobe) 1806ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * case: root opens device, unattached, in_request_module=0 -> autoload 1807ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * 1808ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * The last could be changed to "-> ok", which would deny root 1809ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * autoloading. 1810ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef */ 1811ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_lock(&dev->mutex); 1812ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (dev->attached) 1813ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto ok; 1814a8f80e8ff94ecba629542d9b4b5f5a8ee3eb565cEric Paris if (!capable(CAP_NET_ADMIN) && dev->in_request_module) { 1815ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef DPRINTK("in request module\n"); 1816ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 1817ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -ENODEV; 1818ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1819a8f80e8ff94ecba629542d9b4b5f5a8ee3eb565cEric Paris if (capable(CAP_NET_ADMIN) && dev->in_request_module) 1820ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef goto ok; 1821ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1822ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef dev->in_request_module = 1; 1823ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1824ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#ifdef CONFIG_KMOD 1825ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 182656d92c60e6dc708541711e9de4993e7d527d08e8Ian Abbott request_module("char-major-%i-%i", COMEDI_MAJOR, dev->minor); 1827ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_lock(&dev->mutex); 1828ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef#endif 1829ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1830ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef dev->in_request_module = 0; 1831ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1832a8f80e8ff94ecba629542d9b4b5f5a8ee3eb565cEric Paris if (!dev->attached && !capable(CAP_NET_ADMIN)) { 1833a8f80e8ff94ecba629542d9b4b5f5a8ee3eb565cEric Paris DPRINTK("not attached and not CAP_NET_ADMIN\n"); 1834ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 1835ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -ENODEV; 1836ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1837ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefok: 1838ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef __module_get(THIS_MODULE); 1839ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1840ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (dev->attached) { 1841ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!try_module_get(dev->driver->module)) { 1842ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef module_put(THIS_MODULE); 1843ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 1844ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -ENOSYS; 1845ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1846ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1847ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 18483c17ba0743d75f9888d905ddf9f8551c7dd36493Ian Abbott if (dev->attached && dev->use_count == 0 && dev->open) { 18493c17ba0743d75f9888d905ddf9f8551c7dd36493Ian Abbott int rc = dev->open(dev); 18503c17ba0743d75f9888d905ddf9f8551c7dd36493Ian Abbott if (rc < 0) { 18513c17ba0743d75f9888d905ddf9f8551c7dd36493Ian Abbott module_put(dev->driver->module); 18523c17ba0743d75f9888d905ddf9f8551c7dd36493Ian Abbott module_put(THIS_MODULE); 18533c17ba0743d75f9888d905ddf9f8551c7dd36493Ian Abbott mutex_unlock(&dev->mutex); 18543c17ba0743d75f9888d905ddf9f8551c7dd36493Ian Abbott return rc; 18553c17ba0743d75f9888d905ddf9f8551c7dd36493Ian Abbott } 18563c17ba0743d75f9888d905ddf9f8551c7dd36493Ian Abbott } 1857ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1858ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef dev->use_count++; 1859ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1860ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 1861ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1862ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 1863ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1864ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1865ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic int comedi_close(struct inode *inode, struct file *file) 1866ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1867ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef const unsigned minor = iminor(inode); 1868476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman struct comedi_device_file_info *dev_file_info = 1869476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_device_file_info(minor); 187071b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton struct comedi_device *dev = dev_file_info->device; 187134c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s = NULL; 1872ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int i; 1873ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1874ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_lock(&dev->mutex); 1875ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1876ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (dev->subdevices) { 1877ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef for (i = 0; i < dev->n_subdevices; i++) { 1878ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + i; 1879ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1880476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (s->busy == file) 1881ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef do_cancel(dev, s); 1882476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (s->lock == file) 1883ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->lock = NULL; 1884ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1885ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1886476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (dev->attached && dev->use_count == 1 && dev->close) 1887ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef dev->close(dev); 1888ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1889ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef module_put(THIS_MODULE); 1890476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (dev->attached) 1891ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef module_put(dev->driver->module); 1892ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1893ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef dev->use_count--; 1894ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1895ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 1896ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1897476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (file->f_flags & FASYNC) 1898ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_fasync(-1, file, 0); 1899ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1900ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 1901ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1902ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1903ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic int comedi_fasync(int fd, struct file *file, int on) 1904ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1905ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef const unsigned minor = iminor(file->f_dentry->d_inode); 1906476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman struct comedi_device_file_info *dev_file_info = 1907476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman comedi_get_device_file_info(minor); 1908476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman 190971b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton struct comedi_device *dev = dev_file_info->device; 1910ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1911ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return fasync_helper(fd, file, on, &dev->async_queue); 1912ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1913ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1914ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefconst struct file_operations comedi_fops = { 19150a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .owner = THIS_MODULE, 19160a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .unlocked_ioctl = comedi_unlocked_ioctl, 19170a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .compat_ioctl = comedi_compat_ioctl, 19180a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .open = comedi_open, 19190a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .release = comedi_close, 19200a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .read = comedi_read, 19210a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .write = comedi_write, 19220a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .mmap = comedi_mmap, 19230a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .poll = comedi_poll, 19240a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .fasync = comedi_fasync, 1925ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef}; 1926ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1927476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartmanstruct class *comedi_class; 1928ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic struct cdev comedi_cdev; 1929ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1930ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic void comedi_cleanup_legacy_minors(void) 1931ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1932ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned i; 1933476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman 19341dd33ab8a9397793d65b9fc090174ff7cdfaff95Bernd Porr for (i = 0; i < comedi_num_legacy_minors; i++) 1935ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_free_board_minor(i); 1936ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 1937ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1938ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic int __init comedi_init(void) 1939ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 1940ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int i; 1941ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int retval; 1942ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1943476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman printk(KERN_INFO "comedi: version " COMEDI_RELEASE 1944476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman " - http://www.comedi.org\n"); 1945ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1946a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess if (comedi_num_legacy_minors < 0 || 1947a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess comedi_num_legacy_minors > COMEDI_NUM_BOARD_MINORS) { 1948a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess printk(KERN_ERR "comedi: error: invalid value for module " 1949a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess "parameter \"comedi_num_legacy_minors\". Valid values " 1950a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess "are 0 through %i.\n", COMEDI_NUM_BOARD_MINORS); 1951a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess return -EINVAL; 1952a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess } 1953a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess 1954a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess /* 1955a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess * comedi is unusable if both comedi_autoconfig and 1956a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess * comedi_num_legacy_minors are zero, so we might as well adjust the 1957a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess * defaults in that case 1958a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess */ 1959a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess if (comedi_autoconfig == 0 && comedi_num_legacy_minors == 0) 1960a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess comedi_num_legacy_minors = 16; 1961a3cb729ef4a192f04179f780122df78ef1ffe779Frank Mori Hess 1962476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman memset(comedi_file_info_table, 0, 1963476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman sizeof(struct comedi_device_file_info *) * COMEDI_NUM_MINORS); 1964ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1965ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef retval = register_chrdev_region(MKDEV(COMEDI_MAJOR, 0), 1966476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman COMEDI_NUM_MINORS, "comedi"); 1967ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (retval) 1968ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EIO; 1969ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef cdev_init(&comedi_cdev, &comedi_fops); 1970ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_cdev.owner = THIS_MODULE; 1971ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef kobject_set_name(&comedi_cdev.kobj, "comedi"); 1972ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (cdev_add(&comedi_cdev, MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS)) { 1973ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), 1974476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman COMEDI_NUM_MINORS); 1975ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EIO; 1976ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1977ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_class = class_create(THIS_MODULE, "comedi"); 1978ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (IS_ERR(comedi_class)) { 19793fffdf2045d0dbca3833f8f54ae41ce5f2c0b8faMark Rankilor printk(KERN_ERR "comedi: failed to create class"); 1980ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef cdev_del(&comedi_cdev); 1981ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), 1982476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman COMEDI_NUM_MINORS); 1983ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return PTR_ERR(comedi_class); 1984ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 1985ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1986ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* XXX requires /proc interface */ 1987ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_proc_init(); 1988ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 1989476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman /* create devices files for legacy/manual use */ 19901dd33ab8a9397793d65b9fc090174ff7cdfaff95Bernd Porr for (i = 0; i < comedi_num_legacy_minors; i++) { 1991ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int minor; 1992ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef minor = comedi_alloc_board_minor(NULL); 1993476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (minor < 0) { 1994ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_cleanup_legacy_minors(); 1995ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef cdev_del(&comedi_cdev); 1996ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), 1997476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman COMEDI_NUM_MINORS); 1998ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return minor; 1999ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2000ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2001ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2002ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 2003ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 2004ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2005ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstatic void __exit comedi_cleanup(void) 2006ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 2007ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int i; 2008ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2009ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_cleanup_legacy_minors(); 2010476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman for (i = 0; i < COMEDI_NUM_MINORS; ++i) 2011ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef BUG_ON(comedi_file_info_table[i]); 2012476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman 2013ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef class_destroy(comedi_class); 2014ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef cdev_del(&comedi_cdev); 2015ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS); 2016ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2017ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_proc_cleanup(); 2018ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 2019ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2020ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefmodule_init(comedi_init); 2021ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefmodule_exit(comedi_cleanup); 2022ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 202371b5f4f11971dea972832ad63a994c7e5b45db6bBill Pembertonvoid comedi_error(const struct comedi_device *dev, const char *s) 2024ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 20253fffdf2045d0dbca3833f8f54ae41ce5f2c0b8faMark Rankilor printk(KERN_ERR "comedi%d: %s: %s\n", dev->minor, 20263fffdf2045d0dbca3833f8f54ae41ce5f2c0b8faMark Rankilor dev->driver->driver_name, s); 2027ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 202818736438ae4ab3d96602b92446e07cc03c024b02Greg Kroah-HartmanEXPORT_SYMBOL(comedi_error); 2029ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 203034c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pembertonvoid comedi_event(struct comedi_device *dev, struct comedi_subdevice *s) 2031ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 2032d163679ceec20c50f9aee880fa76c0c1185244a8Bill Pemberton struct comedi_async *async = s->async; 2033ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned runflags = 0; 2034ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned runflags_mask = 0; 2035ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2036476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman /* DPRINTK("comedi_event 0x%x\n",mask); */ 2037ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2038ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if ((comedi_get_subdevice_runflags(s) & SRF_RUNNING) == 0) 2039ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return; 2040ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 20410a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral if (s-> 20420a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral async->events & (COMEDI_CB_EOA | COMEDI_CB_ERROR | 20430a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral COMEDI_CB_OVERFLOW)) { 2044ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef runflags_mask |= SRF_RUNNING; 2045ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2046ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /* remember if an error event has occured, so an error 2047ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef * can be returned the next time the user does a read() */ 2048ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->async->events & (COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW)) { 2049ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef runflags_mask |= SRF_ERROR; 2050ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef runflags |= SRF_ERROR; 2051ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2052ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (runflags_mask) { 2053ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef /*sets SRF_ERROR and SRF_RUNNING together atomically */ 2054ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_set_subdevice_runflags(s, runflags_mask, runflags); 2055ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2056ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2057ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (async->cb_mask & s->async->events) { 2058ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (comedi_get_subdevice_runflags(s) & SRF_USER) { 2059fcea115462c690ba09f9df7471d60dda0d86a4eaGreg Kroah-Hartman wake_up_interruptible(&async->wait_head); 20606705b68d0be284e2f9949f3657ea65d426d0f988Andrea Gelmini if (s->subdev_flags & SDF_CMD_READ) 20610a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral kill_fasync(&dev->async_queue, SIGIO, POLL_IN); 20626705b68d0be284e2f9949f3657ea65d426d0f988Andrea Gelmini if (s->subdev_flags & SDF_CMD_WRITE) 20630a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral kill_fasync(&dev->async_queue, SIGIO, POLL_OUT); 2064ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } else { 2065ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (async->cb_func) 2066ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef async->cb_func(s->async->events, async->cb_arg); 2067ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2068ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2069ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->async->events = 0; 2070ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 207118736438ae4ab3d96602b92446e07cc03c024b02Greg Kroah-HartmanEXPORT_SYMBOL(comedi_event); 2072ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 207334c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pembertonunsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s) 2074ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 2075ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned long flags; 2076ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned runflags; 2077ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 20785f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_lock_irqsave(&s->spin_lock, flags); 2079ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef runflags = s->runflags; 20805f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_unlock_irqrestore(&s->spin_lock, flags); 2081ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return runflags; 2082ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 208318736438ae4ab3d96602b92446e07cc03c024b02Greg Kroah-HartmanEXPORT_SYMBOL(comedi_get_subdevice_runflags); 2084ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 208571b5f4f11971dea972832ad63a994c7e5b45db6bBill Pembertonstatic int is_device_busy(struct comedi_device *dev) 2086ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 208734c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pemberton struct comedi_subdevice *s; 2088ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef int i; 2089ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2090ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (!dev->attached) 2091ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 2092ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2093ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef for (i = 0; i < dev->n_subdevices; i++) { 2094ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s = dev->subdevices + i; 2095ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->busy) 2096ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 1; 2097ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef if (s->async && s->async->mmap_count) 2098ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 1; 2099ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2100ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2101ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return 0; 2102ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 2103ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 210492d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic void comedi_device_init(struct comedi_device *dev) 2105ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 210671b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton memset(dev, 0, sizeof(struct comedi_device)); 2107ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef spin_lock_init(&dev->spinlock); 2108ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_init(&dev->mutex); 2109ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef dev->minor = -1; 2110ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 2111ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 211292d0127c9d249c078b0939050f25041ed37be7cdGreg Kroah-Hartmanstatic void comedi_device_cleanup(struct comedi_device *dev) 2113ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 2114476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (dev == NULL) 2115476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman return; 2116ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_lock(&dev->mutex); 2117ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_device_detach(dev); 2118ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_unlock(&dev->mutex); 2119ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef mutex_destroy(&dev->mutex); 2120ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 2121ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2122ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefint comedi_alloc_board_minor(struct device *hardware_device) 2123ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 2124ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned long flags; 2125ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef struct comedi_device_file_info *info; 21260bfbbe8f09617247c87d3b626cbf007c423afff1Bill Pemberton struct device *csdev; 2127ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned i; 2128883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess int retval; 2129ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2130ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef info = kzalloc(sizeof(struct comedi_device_file_info), GFP_KERNEL); 2131476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (info == NULL) 2132476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman return -ENOMEM; 213371b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton info->device = kzalloc(sizeof(struct comedi_device), GFP_KERNEL); 2134476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (info->device == NULL) { 2135ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef kfree(info); 2136ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -ENOMEM; 2137ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2138ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_device_init(info->device); 21395f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_lock_irqsave(&comedi_file_info_table_lock, flags); 2140476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman for (i = 0; i < COMEDI_NUM_BOARD_MINORS; ++i) { 2141476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (comedi_file_info_table[i] == NULL) { 2142ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_file_info_table[i] = info; 2143ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 2144ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2145ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 21465f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_unlock_irqrestore(&comedi_file_info_table_lock, flags); 2147476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (i == COMEDI_NUM_BOARD_MINORS) { 2148ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_device_cleanup(info->device); 2149ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef kfree(info->device); 2150ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef kfree(info); 21510a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral printk(KERN_ERR 215221fe2eea6381845956322e63e441f351774de7f9Mark "comedi: error: " 215321fe2eea6381845956322e63e441f351774de7f9Mark "ran out of minor numbers for board device files.\n"); 2154ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EBUSY; 2155ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2156ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef info->device->minor = i; 2157ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef csdev = COMEDI_DEVICE_CREATE(comedi_class, NULL, 2158476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman MKDEV(COMEDI_MAJOR, i), NULL, 2159476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman hardware_device, "comedi%i", i); 2160476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (!IS_ERR(csdev)) 2161ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef info->device->class_dev = csdev; 2162883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess dev_set_drvdata(csdev, info); 2163883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = device_create_file(csdev, &dev_attr_max_read_buffer_kb); 2164883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval) { 21650a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral printk(KERN_ERR 216621fe2eea6381845956322e63e441f351774de7f9Mark "comedi: " 216721fe2eea6381845956322e63e441f351774de7f9Mark "failed to create sysfs attribute file \"%s\".\n", 21680a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral dev_attr_max_read_buffer_kb.attr.name); 2169883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess comedi_free_board_minor(i); 2170883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2171883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2172883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = device_create_file(csdev, &dev_attr_read_buffer_kb); 2173883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval) { 21740a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral printk(KERN_ERR 217521fe2eea6381845956322e63e441f351774de7f9Mark "comedi: " 217621fe2eea6381845956322e63e441f351774de7f9Mark "failed to create sysfs attribute file \"%s\".\n", 21770a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral dev_attr_read_buffer_kb.attr.name); 2178883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess comedi_free_board_minor(i); 2179883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2180883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2181883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = device_create_file(csdev, &dev_attr_max_write_buffer_kb); 2182883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval) { 21830a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral printk(KERN_ERR 218421fe2eea6381845956322e63e441f351774de7f9Mark "comedi: " 218521fe2eea6381845956322e63e441f351774de7f9Mark "failed to create sysfs attribute file \"%s\".\n", 21860a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral dev_attr_max_write_buffer_kb.attr.name); 2187883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess comedi_free_board_minor(i); 2188883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2189883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2190883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = device_create_file(csdev, &dev_attr_write_buffer_kb); 2191883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval) { 21920a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral printk(KERN_ERR 219321fe2eea6381845956322e63e441f351774de7f9Mark "comedi: " 219421fe2eea6381845956322e63e441f351774de7f9Mark "failed to create sysfs attribute file \"%s\".\n", 21950a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral dev_attr_write_buffer_kb.attr.name); 2196883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess comedi_free_board_minor(i); 2197883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2198883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2199ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return i; 2200ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 2201ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2202ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefvoid comedi_free_board_minor(unsigned minor) 2203ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 2204ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned long flags; 2205ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef struct comedi_device_file_info *info; 2206ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2207ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef BUG_ON(minor >= COMEDI_NUM_BOARD_MINORS); 22085f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_lock_irqsave(&comedi_file_info_table_lock, flags); 2209ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef info = comedi_file_info_table[minor]; 2210ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_file_info_table[minor] = NULL; 22115f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_unlock_irqrestore(&comedi_file_info_table_lock, flags); 2212ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2213476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (info) { 221471b5f4f11971dea972832ad63a994c7e5b45db6bBill Pemberton struct comedi_device *dev = info->device; 2215476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (dev) { 2216476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (dev->class_dev) { 2217476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman device_destroy(comedi_class, 2218476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman MKDEV(COMEDI_MAJOR, dev->minor)); 2219ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2220ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_device_cleanup(dev); 2221ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef kfree(dev); 2222ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2223ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef kfree(info); 2224ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2225ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 2226ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2227883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessint comedi_alloc_subdevice_minor(struct comedi_device *dev, 2228883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *s) 2229ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 2230ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned long flags; 2231ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef struct comedi_device_file_info *info; 22320bfbbe8f09617247c87d3b626cbf007c423afff1Bill Pemberton struct device *csdev; 2233ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned i; 2234883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess int retval; 2235ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2236ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef info = kmalloc(sizeof(struct comedi_device_file_info), GFP_KERNEL); 2237476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (info == NULL) 2238476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman return -ENOMEM; 2239ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef info->device = dev; 2240ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef info->read_subdevice = s; 2241ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef info->write_subdevice = s; 22425f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_lock_irqsave(&comedi_file_info_table_lock, flags); 22434c41f3ae3bf0bcc53f259b657c2fbc3961ff2b8aFrank Mori Hess for (i = COMEDI_FIRST_SUBDEVICE_MINOR; i < COMEDI_NUM_MINORS; ++i) { 2244476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (comedi_file_info_table[i] == NULL) { 2245ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_file_info_table[i] = info; 2246ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef break; 2247ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2248ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 22495f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_unlock_irqrestore(&comedi_file_info_table_lock, flags); 2250476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (i == COMEDI_NUM_MINORS) { 2251ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef kfree(info); 22520a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral printk(KERN_ERR 225321fe2eea6381845956322e63e441f351774de7f9Mark "comedi: error: " 225421fe2eea6381845956322e63e441f351774de7f9Mark "ran out of minor numbers for board device files.\n"); 2255ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return -EBUSY; 2256ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2257ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->minor = i; 2258ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef csdev = COMEDI_DEVICE_CREATE(comedi_class, dev->class_dev, 2259476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman MKDEV(COMEDI_MAJOR, i), NULL, NULL, 2260476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman "comedi%i_subd%i", dev->minor, 2261476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman (int)(s - dev->subdevices)); 2262476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (!IS_ERR(csdev)) 2263ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->class_dev = csdev; 2264883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess dev_set_drvdata(csdev, info); 2265883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = device_create_file(csdev, &dev_attr_max_read_buffer_kb); 2266883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval) { 22670a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral printk(KERN_ERR 226821fe2eea6381845956322e63e441f351774de7f9Mark "comedi: " 226921fe2eea6381845956322e63e441f351774de7f9Mark "failed to create sysfs attribute file \"%s\".\n", 22700a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral dev_attr_max_read_buffer_kb.attr.name); 2271883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess comedi_free_subdevice_minor(s); 2272883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2273883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2274883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = device_create_file(csdev, &dev_attr_read_buffer_kb); 2275883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval) { 22760a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral printk(KERN_ERR 227721fe2eea6381845956322e63e441f351774de7f9Mark "comedi: " 227821fe2eea6381845956322e63e441f351774de7f9Mark "failed to create sysfs attribute file \"%s\".\n", 22790a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral dev_attr_read_buffer_kb.attr.name); 2280883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess comedi_free_subdevice_minor(s); 2281883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2282883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2283883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = device_create_file(csdev, &dev_attr_max_write_buffer_kb); 2284883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval) { 22850a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral printk(KERN_ERR 228621fe2eea6381845956322e63e441f351774de7f9Mark "comedi: " 228721fe2eea6381845956322e63e441f351774de7f9Mark "failed to create sysfs attribute file \"%s\".\n", 22880a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral dev_attr_max_write_buffer_kb.attr.name); 2289883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess comedi_free_subdevice_minor(s); 2290883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2291883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2292883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = device_create_file(csdev, &dev_attr_write_buffer_kb); 2293883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval) { 22940a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral printk(KERN_ERR 229521fe2eea6381845956322e63e441f351774de7f9Mark "comedi: " 229621fe2eea6381845956322e63e441f351774de7f9Mark "failed to create sysfs attribute file \"%s\".\n", 22970a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral dev_attr_write_buffer_kb.attr.name); 2298883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess comedi_free_subdevice_minor(s); 2299883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2300883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2301ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return i; 2302ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 2303ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 230434c43922e62708d45e9660eee4b4f1fb7b4bf2c7Bill Pembertonvoid comedi_free_subdevice_minor(struct comedi_subdevice *s) 2305ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 2306ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned long flags; 2307ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef struct comedi_device_file_info *info; 2308ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2309476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (s == NULL) 2310476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman return; 2311476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (s->minor < 0) 2312476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman return; 2313ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2314ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef BUG_ON(s->minor >= COMEDI_NUM_MINORS); 2315ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef BUG_ON(s->minor < COMEDI_FIRST_SUBDEVICE_MINOR); 2316ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 23175f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_lock_irqsave(&comedi_file_info_table_lock, flags); 2318ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef info = comedi_file_info_table[s->minor]; 2319ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef comedi_file_info_table[s->minor] = NULL; 23205f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_unlock_irqrestore(&comedi_file_info_table_lock, flags); 2321ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2322476b847733636ce5765093f5d1a369cc470e78e6Greg Kroah-Hartman if (s->class_dev) { 2323ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef device_destroy(comedi_class, MKDEV(COMEDI_MAJOR, s->minor)); 2324ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef s->class_dev = NULL; 2325ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef } 2326ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef kfree(info); 2327ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 2328ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2329ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleefstruct comedi_device_file_info *comedi_get_device_file_info(unsigned minor) 2330ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef{ 2331ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef unsigned long flags; 2332ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef struct comedi_device_file_info *info; 2333ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef 2334ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef BUG_ON(minor >= COMEDI_NUM_MINORS); 23355f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_lock_irqsave(&comedi_file_info_table_lock, flags); 2336ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef info = comedi_file_info_table[minor]; 23375f74ea14c07fee91d3bdbaad88bff6264c6200e6Greg Kroah-Hartman spin_unlock_irqrestore(&comedi_file_info_table_lock, flags); 2338ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef return info; 2339ed9eccbe8970f6eedc1b978c157caf1251a896d4David Schleef} 234018736438ae4ab3d96602b92446e07cc03c024b02Greg Kroah-HartmanEXPORT_SYMBOL_GPL(comedi_get_device_file_info); 2341883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2342883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic int resize_async_buffer(struct comedi_device *dev, 2343883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *s, 2344883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_async *async, unsigned new_size) 2345883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess{ 2346883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess int retval; 2347883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2348883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (new_size > async->max_bufsize) 2349883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EPERM; 2350883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2351883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (s->busy) { 2352883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess DPRINTK("subdevice is busy, cannot resize buffer\n"); 2353883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EBUSY; 2354883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2355883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (async->mmap_count) { 2356883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess DPRINTK("subdevice is mmapped, cannot resize buffer\n"); 2357883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EBUSY; 2358883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2359883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2360883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (!async->prealloc_buf) 2361883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 2362883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2363883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess /* make sure buffer is an integral number of pages 23640a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral * (we round up) */ 2365883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess new_size = (new_size + PAGE_SIZE - 1) & PAGE_MASK; 2366883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2367883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = comedi_buf_alloc(dev, s, new_size); 2368883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval < 0) 2369883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2370883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2371883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (s->buf_change) { 2372883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = s->buf_change(dev, s, new_size); 2373883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval < 0) 2374883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2375883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2376883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2377883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess DPRINTK("comedi%i subd %d buffer resized to %i bytes\n", 2378b8b5cd9f87e08f72c78d9197bf199821fda4ba36Ian Abbott dev->minor, (int)(s - dev->subdevices), async->prealloc_bufsz); 2379883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return 0; 2380883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess} 2381883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2382883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess/* sysfs attribute files */ 2383883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2384883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic const unsigned bytes_per_kibi = 1024; 2385883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2386883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic ssize_t show_max_read_buffer_kb(struct device *dev, 2387883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct device_attribute *attr, char *buf) 2388883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess{ 2389883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess ssize_t retval; 2390883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_device_file_info *info = dev_get_drvdata(dev); 2391883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess unsigned max_buffer_size_kb = 0; 2392883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *const read_subdevice = 23930a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral comedi_get_read_subdevice(info); 2394883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2395883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_lock(&info->device->mutex); 2396883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (read_subdevice && 2397883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess (read_subdevice->subdev_flags & SDF_CMD_READ) && 2398883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess read_subdevice->async) { 2399883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess max_buffer_size_kb = read_subdevice->async->max_bufsize / 24000a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral bytes_per_kibi; 2401883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 24020a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral retval = snprintf(buf, PAGE_SIZE, "%i\n", max_buffer_size_kb); 2403883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2404883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2405883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2406883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess} 2407883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2408883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic ssize_t store_max_read_buffer_kb(struct device *dev, 2409883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct device_attribute *attr, 2410883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess const char *buf, size_t count) 2411883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess{ 2412883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_device_file_info *info = dev_get_drvdata(dev); 2413883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess unsigned long new_max_size_kb; 2414883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess uint64_t new_max_size; 2415883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *const read_subdevice = 24160a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral comedi_get_read_subdevice(info); 2417883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2418883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (strict_strtoul(buf, 10, &new_max_size_kb)) 2419883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 24200a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral if (new_max_size_kb != (uint32_t) new_max_size_kb) 2421883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 24220a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral new_max_size = ((uint64_t) new_max_size_kb) * bytes_per_kibi; 24230a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral if (new_max_size != (uint32_t) new_max_size) 2424883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 2425883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2426883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_lock(&info->device->mutex); 2427883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (read_subdevice == NULL || 2428883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess (read_subdevice->subdev_flags & SDF_CMD_READ) == 0 || 2429883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess read_subdevice->async == NULL) { 2430883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2431883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 2432883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2433883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess read_subdevice->async->max_bufsize = new_max_size; 2434883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2435883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2436883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return count; 2437883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess} 2438883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2439883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic struct device_attribute dev_attr_max_read_buffer_kb = { 2440883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .attr = { 24410a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .name = "max_read_buffer_kb", 24420a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .mode = S_IRUGO | S_IWUSR}, 2443883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .show = &show_max_read_buffer_kb, 2444883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .store = &store_max_read_buffer_kb 2445883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess}; 2446883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2447883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic ssize_t show_read_buffer_kb(struct device *dev, 2448883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct device_attribute *attr, char *buf) 2449883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess{ 2450883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess ssize_t retval; 2451883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_device_file_info *info = dev_get_drvdata(dev); 2452883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess unsigned buffer_size_kb = 0; 2453883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *const read_subdevice = 24540a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral comedi_get_read_subdevice(info); 2455883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2456883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_lock(&info->device->mutex); 2457883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (read_subdevice && 24580a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral (read_subdevice->subdev_flags & SDF_CMD_READ) && 24590a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral read_subdevice->async) { 2460883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess buffer_size_kb = read_subdevice->async->prealloc_bufsz / 24610a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral bytes_per_kibi; 2462883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 24630a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral retval = snprintf(buf, PAGE_SIZE, "%i\n", buffer_size_kb); 2464883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2465883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2466883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2467883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess} 2468883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2469883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic ssize_t store_read_buffer_kb(struct device *dev, 2470883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct device_attribute *attr, 2471883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess const char *buf, size_t count) 2472883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess{ 2473883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_device_file_info *info = dev_get_drvdata(dev); 2474883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess unsigned long new_size_kb; 2475883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess uint64_t new_size; 2476883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess int retval; 2477883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *const read_subdevice = 24780a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral comedi_get_read_subdevice(info); 2479883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2480883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (strict_strtoul(buf, 10, &new_size_kb)) 2481883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 24820a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral if (new_size_kb != (uint32_t) new_size_kb) 2483883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 24840a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral new_size = ((uint64_t) new_size_kb) * bytes_per_kibi; 24850a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral if (new_size != (uint32_t) new_size) 2486883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 2487883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2488883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_lock(&info->device->mutex); 2489883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (read_subdevice == NULL || 2490883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess (read_subdevice->subdev_flags & SDF_CMD_READ) == 0 || 2491883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess read_subdevice->async == NULL) { 2492883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2493883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 2494883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2495883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = resize_async_buffer(info->device, read_subdevice, 2496883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess read_subdevice->async, new_size); 2497883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2498883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2499883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval < 0) 2500883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2501883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return count; 2502883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess} 2503883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2504883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic struct device_attribute dev_attr_read_buffer_kb = { 2505883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .attr = { 25060a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .name = "read_buffer_kb", 25070a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .mode = S_IRUGO | S_IWUSR | S_IWGRP}, 2508883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .show = &show_read_buffer_kb, 2509883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .store = &store_read_buffer_kb 2510883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess}; 2511883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2512883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic ssize_t show_max_write_buffer_kb(struct device *dev, 2513883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct device_attribute *attr, 2514883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess char *buf) 2515883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess{ 2516883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess ssize_t retval; 2517883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_device_file_info *info = dev_get_drvdata(dev); 2518883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess unsigned max_buffer_size_kb = 0; 2519883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *const write_subdevice = 25200a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral comedi_get_write_subdevice(info); 2521883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2522883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_lock(&info->device->mutex); 2523883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (write_subdevice && 2524883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess (write_subdevice->subdev_flags & SDF_CMD_WRITE) && 2525883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess write_subdevice->async) { 2526883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess max_buffer_size_kb = write_subdevice->async->max_bufsize / 25270a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral bytes_per_kibi; 2528883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 25290a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral retval = snprintf(buf, PAGE_SIZE, "%i\n", max_buffer_size_kb); 2530883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2531883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2532883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2533883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess} 2534883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2535883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic ssize_t store_max_write_buffer_kb(struct device *dev, 2536883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct device_attribute *attr, 2537883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess const char *buf, size_t count) 2538883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess{ 2539883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_device_file_info *info = dev_get_drvdata(dev); 2540883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess unsigned long new_max_size_kb; 2541883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess uint64_t new_max_size; 2542883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *const write_subdevice = 25430a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral comedi_get_write_subdevice(info); 2544883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2545883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (strict_strtoul(buf, 10, &new_max_size_kb)) 2546883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 25470a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral if (new_max_size_kb != (uint32_t) new_max_size_kb) 2548883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 25490a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral new_max_size = ((uint64_t) new_max_size_kb) * bytes_per_kibi; 25500a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral if (new_max_size != (uint32_t) new_max_size) 2551883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 2552883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2553883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_lock(&info->device->mutex); 2554883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (write_subdevice == NULL || 2555883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess (write_subdevice->subdev_flags & SDF_CMD_WRITE) == 0 || 2556883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess write_subdevice->async == NULL) { 2557883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2558883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 2559883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2560883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess write_subdevice->async->max_bufsize = new_max_size; 2561883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2562883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2563883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return count; 2564883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess} 2565883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2566883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic struct device_attribute dev_attr_max_write_buffer_kb = { 2567883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .attr = { 25680a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .name = "max_write_buffer_kb", 25690a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .mode = S_IRUGO | S_IWUSR}, 2570883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .show = &show_max_write_buffer_kb, 2571883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .store = &store_max_write_buffer_kb 2572883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess}; 2573883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2574883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic ssize_t show_write_buffer_kb(struct device *dev, 2575883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct device_attribute *attr, char *buf) 2576883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess{ 2577883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess ssize_t retval; 2578883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_device_file_info *info = dev_get_drvdata(dev); 2579883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess unsigned buffer_size_kb = 0; 2580883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *const write_subdevice = 25810a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral comedi_get_write_subdevice(info); 2582883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2583883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_lock(&info->device->mutex); 2584883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (write_subdevice && 2585883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess (write_subdevice->subdev_flags & SDF_CMD_WRITE) && 2586883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess write_subdevice->async) { 2587883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess buffer_size_kb = write_subdevice->async->prealloc_bufsz / 25880a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral bytes_per_kibi; 2589883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 25900a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral retval = snprintf(buf, PAGE_SIZE, "%i\n", buffer_size_kb); 2591883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2592883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2593883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2594883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess} 2595883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2596883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic ssize_t store_write_buffer_kb(struct device *dev, 2597883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct device_attribute *attr, 2598883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess const char *buf, size_t count) 2599883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess{ 2600883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_device_file_info *info = dev_get_drvdata(dev); 2601883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess unsigned long new_size_kb; 2602883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess uint64_t new_size; 2603883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess int retval; 2604883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess struct comedi_subdevice *const write_subdevice = 26050a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral comedi_get_write_subdevice(info); 2606883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2607883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (strict_strtoul(buf, 10, &new_size_kb)) 2608883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 26090a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral if (new_size_kb != (uint32_t) new_size_kb) 2610883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 26110a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral new_size = ((uint64_t) new_size_kb) * bytes_per_kibi; 26120a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral if (new_size != (uint32_t) new_size) 2613883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 2614883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2615883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_lock(&info->device->mutex); 2616883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (write_subdevice == NULL || 2617883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess (write_subdevice->subdev_flags & SDF_CMD_WRITE) == 0 || 2618883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess write_subdevice->async == NULL) { 2619883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2620883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return -EINVAL; 2621883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess } 2622883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess retval = resize_async_buffer(info->device, write_subdevice, 26230a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral write_subdevice->async, new_size); 2624883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess mutex_unlock(&info->device->mutex); 2625883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2626883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess if (retval < 0) 2627883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return retval; 2628883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess return count; 2629883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess} 2630883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess 2631883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hessstatic struct device_attribute dev_attr_write_buffer_kb = { 2632883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .attr = { 26330a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .name = "write_buffer_kb", 26340a85b6f0ab0d2edb0d41b32697111ce0e4f43496Mithlesh Thukral .mode = S_IRUGO | S_IWUSR | S_IWGRP}, 2635883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .show = &show_write_buffer_kb, 2636883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess .store = &store_write_buffer_kb 2637883db3d9bb4d50f05cbb8b5197f6aef10c1231a9Frank Mori Hess}; 2638