Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1 | /* |
| 2 | * VMEbus User access driver |
| 3 | * |
Martyn Welch | 66bd8db | 2010-02-18 15:12:52 +0000 | [diff] [blame] | 4 | * Author: Martyn Welch <martyn.welch@ge.com> |
| 5 | * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc. |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 6 | * |
| 7 | * Based on work by: |
| 8 | * Tom Armistead and Ajit Prem |
| 9 | * Copyright 2004 Motorola Inc. |
| 10 | * |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify it |
| 13 | * under the terms of the GNU General Public License as published by the |
| 14 | * Free Software Foundation; either version 2 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | */ |
| 17 | |
| 18 | #include <linux/cdev.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/device.h> |
| 21 | #include <linux/dma-mapping.h> |
| 22 | #include <linux/errno.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/ioctl.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/mm.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/pagemap.h> |
| 29 | #include <linux/pci.h> |
| 30 | #include <linux/semaphore.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 32 | #include <linux/spinlock.h> |
| 33 | #include <linux/syscalls.h> |
Arnd Bergmann | 8e2394a | 2010-07-11 23:18:52 +0200 | [diff] [blame] | 34 | #include <linux/mutex.h> |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 35 | #include <linux/types.h> |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 36 | |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 37 | #include <linux/io.h> |
| 38 | #include <linux/uaccess.h> |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 39 | |
| 40 | #include "../vme.h" |
| 41 | #include "vme_user.h" |
| 42 | |
Arnd Bergmann | 8e2394a | 2010-07-11 23:18:52 +0200 | [diff] [blame] | 43 | static DEFINE_MUTEX(vme_user_mutex); |
Vincent Bossier | 584721c | 2011-06-03 10:07:39 +0100 | [diff] [blame] | 44 | static const char driver_name[] = "vme_user"; |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 45 | |
| 46 | static int bus[USER_BUS_MAX]; |
Emilio G. Cota | c949231 | 2010-11-12 11:15:21 +0000 | [diff] [blame] | 47 | static unsigned int bus_num; |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 48 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 49 | /* Currently Documentation/devices.txt defines the following for VME: |
| 50 | * |
| 51 | * 221 char VME bus |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 52 | * 0 = /dev/bus/vme/m0 First master image |
| 53 | * 1 = /dev/bus/vme/m1 Second master image |
| 54 | * 2 = /dev/bus/vme/m2 Third master image |
| 55 | * 3 = /dev/bus/vme/m3 Fourth master image |
| 56 | * 4 = /dev/bus/vme/s0 First slave image |
| 57 | * 5 = /dev/bus/vme/s1 Second slave image |
| 58 | * 6 = /dev/bus/vme/s2 Third slave image |
| 59 | * 7 = /dev/bus/vme/s3 Fourth slave image |
| 60 | * 8 = /dev/bus/vme/ctl Control |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 61 | * |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 62 | * It is expected that all VME bus drivers will use the |
| 63 | * same interface. For interface documentation see |
| 64 | * http://www.vmelinux.org/. |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 65 | * |
| 66 | * However the VME driver at http://www.vmelinux.org/ is rather old and doesn't |
| 67 | * even support the tsi148 chipset (which has 8 master and 8 slave windows). |
| 68 | * We'll run with this or now as far as possible, however it probably makes |
| 69 | * sense to get rid of the old mappings and just do everything dynamically. |
| 70 | * |
| 71 | * So for now, we'll restrict the driver to providing 4 masters and 4 slaves as |
| 72 | * defined above and try to support at least some of the interface from |
| 73 | * http://www.vmelinux.org/ as an alternative drive can be written providing a |
| 74 | * saner interface later. |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 75 | * |
| 76 | * The vmelinux.org driver never supported slave images, the devices reserved |
| 77 | * for slaves were repurposed to support all 8 master images on the UniverseII! |
| 78 | * We shall support 4 masters and 4 slaves with this driver. |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 79 | */ |
| 80 | #define VME_MAJOR 221 /* VME Major Device Number */ |
| 81 | #define VME_DEVS 9 /* Number of dev entries */ |
| 82 | |
| 83 | #define MASTER_MINOR 0 |
| 84 | #define MASTER_MAX 3 |
| 85 | #define SLAVE_MINOR 4 |
| 86 | #define SLAVE_MAX 7 |
| 87 | #define CONTROL_MINOR 8 |
| 88 | |
| 89 | #define PCI_BUF_SIZE 0x20000 /* Size of one slave image buffer */ |
| 90 | |
| 91 | /* |
| 92 | * Structure to handle image related parameters. |
| 93 | */ |
Vincent Bossier | 584721c | 2011-06-03 10:07:39 +0100 | [diff] [blame] | 94 | struct image_desc { |
Emilio G. Cota | 0a81a0f | 2010-11-12 11:15:27 +0000 | [diff] [blame] | 95 | void *kern_buf; /* Buffer address in kernel space */ |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 96 | dma_addr_t pci_buf; /* Buffer address in PCI address space */ |
| 97 | unsigned long long size_buf; /* Buffer size */ |
| 98 | struct semaphore sem; /* Semaphore for locking image */ |
| 99 | struct device *device; /* Sysfs device */ |
| 100 | struct vme_resource *resource; /* VME resource */ |
| 101 | int users; /* Number of current users */ |
Vincent Bossier | 584721c | 2011-06-03 10:07:39 +0100 | [diff] [blame] | 102 | }; |
| 103 | static struct image_desc image[VME_DEVS]; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 104 | |
Vincent Bossier | 584721c | 2011-06-03 10:07:39 +0100 | [diff] [blame] | 105 | struct driver_stats { |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 106 | unsigned long reads; |
| 107 | unsigned long writes; |
| 108 | unsigned long ioctls; |
| 109 | unsigned long irqs; |
| 110 | unsigned long berrs; |
| 111 | unsigned long dmaErrors; |
| 112 | unsigned long timeouts; |
| 113 | unsigned long external; |
Vincent Bossier | 584721c | 2011-06-03 10:07:39 +0100 | [diff] [blame] | 114 | }; |
| 115 | static struct driver_stats statistics; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 116 | |
Emilio G. Cota | b9cc293 | 2010-11-12 11:15:14 +0000 | [diff] [blame] | 117 | static struct cdev *vme_user_cdev; /* Character device */ |
| 118 | static struct class *vme_user_sysfs_class; /* Sysfs class */ |
| 119 | static struct device *vme_user_bridge; /* Pointer to bridge device */ |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 120 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 121 | |
| 122 | static const int type[VME_DEVS] = { MASTER_MINOR, MASTER_MINOR, |
| 123 | MASTER_MINOR, MASTER_MINOR, |
| 124 | SLAVE_MINOR, SLAVE_MINOR, |
| 125 | SLAVE_MINOR, SLAVE_MINOR, |
| 126 | CONTROL_MINOR |
| 127 | }; |
| 128 | |
| 129 | |
| 130 | static int vme_user_open(struct inode *, struct file *); |
| 131 | static int vme_user_release(struct inode *, struct file *); |
Emilio G. Cota | 1a85f20 | 2010-11-12 11:15:34 +0000 | [diff] [blame] | 132 | static ssize_t vme_user_read(struct file *, char __user *, size_t, loff_t *); |
| 133 | static ssize_t vme_user_write(struct file *, const char __user *, size_t, |
| 134 | loff_t *); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 135 | static loff_t vme_user_llseek(struct file *, loff_t, int); |
Arnd Bergmann | b1f2ac0 | 2010-04-27 20:15:07 +0200 | [diff] [blame] | 136 | static long vme_user_unlocked_ioctl(struct file *, unsigned int, unsigned long); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 137 | |
Emilio G. Cota | 4740a08 | 2010-12-03 13:44:15 +0000 | [diff] [blame] | 138 | static int __devinit vme_user_probe(struct device *, int, int); |
| 139 | static int __devexit vme_user_remove(struct device *, int, int); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 140 | |
Vincent Bossier | 584721c | 2011-06-03 10:07:39 +0100 | [diff] [blame] | 141 | static const struct file_operations vme_user_fops = { |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 142 | .open = vme_user_open, |
| 143 | .release = vme_user_release, |
| 144 | .read = vme_user_read, |
| 145 | .write = vme_user_write, |
| 146 | .llseek = vme_user_llseek, |
| 147 | .unlocked_ioctl = vme_user_unlocked_ioctl, |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 148 | }; |
| 149 | |
| 150 | |
| 151 | /* |
| 152 | * Reset all the statistic counters |
| 153 | */ |
| 154 | static void reset_counters(void) |
| 155 | { |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 156 | statistics.reads = 0; |
| 157 | statistics.writes = 0; |
| 158 | statistics.ioctls = 0; |
| 159 | statistics.irqs = 0; |
| 160 | statistics.berrs = 0; |
| 161 | statistics.dmaErrors = 0; |
| 162 | statistics.timeouts = 0; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 163 | } |
| 164 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 165 | static int vme_user_open(struct inode *inode, struct file *file) |
| 166 | { |
| 167 | int err; |
| 168 | unsigned int minor = MINOR(inode->i_rdev); |
| 169 | |
| 170 | down(&image[minor].sem); |
Vincent Bossier | 05614fb | 2011-06-09 09:20:31 +0100 | [diff] [blame] | 171 | /* Allow device to be opened if a resource is needed and allocated. */ |
| 172 | if (minor < CONTROL_MINOR && image[minor].resource == NULL) { |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 173 | printk(KERN_ERR "No resources allocated for device\n"); |
| 174 | err = -EINVAL; |
| 175 | goto err_res; |
| 176 | } |
| 177 | |
| 178 | /* Increment user count */ |
| 179 | image[minor].users++; |
| 180 | |
| 181 | up(&image[minor].sem); |
| 182 | |
| 183 | return 0; |
| 184 | |
| 185 | err_res: |
| 186 | up(&image[minor].sem); |
| 187 | |
| 188 | return err; |
| 189 | } |
| 190 | |
| 191 | static int vme_user_release(struct inode *inode, struct file *file) |
| 192 | { |
| 193 | unsigned int minor = MINOR(inode->i_rdev); |
| 194 | |
| 195 | down(&image[minor].sem); |
| 196 | |
| 197 | /* Decrement user count */ |
| 198 | image[minor].users--; |
| 199 | |
| 200 | up(&image[minor].sem); |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * We are going ot alloc a page during init per window for small transfers. |
| 207 | * Small transfers will go VME -> buffer -> user space. Larger (more than a |
| 208 | * page) transfers will lock the user space buffer into memory and then |
| 209 | * transfer the data directly into the user space buffers. |
| 210 | */ |
| 211 | static ssize_t resource_to_user(int minor, char __user *buf, size_t count, |
| 212 | loff_t *ppos) |
| 213 | { |
| 214 | ssize_t retval; |
| 215 | ssize_t copied = 0; |
| 216 | |
| 217 | if (count <= image[minor].size_buf) { |
| 218 | /* We copy to kernel buffer */ |
| 219 | copied = vme_master_read(image[minor].resource, |
| 220 | image[minor].kern_buf, count, *ppos); |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 221 | if (copied < 0) |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 222 | return (int)copied; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 223 | |
| 224 | retval = __copy_to_user(buf, image[minor].kern_buf, |
| 225 | (unsigned long)copied); |
| 226 | if (retval != 0) { |
| 227 | copied = (copied - retval); |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 228 | printk(KERN_INFO "User copy failed\n"); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 229 | return -EINVAL; |
| 230 | } |
| 231 | |
| 232 | } else { |
| 233 | /* XXX Need to write this */ |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 234 | printk(KERN_INFO "Currently don't support large transfers\n"); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 235 | /* Map in pages from userspace */ |
| 236 | |
| 237 | /* Call vme_master_read to do the transfer */ |
| 238 | return -EINVAL; |
| 239 | } |
| 240 | |
| 241 | return copied; |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * We are going ot alloc a page during init per window for small transfers. |
| 246 | * Small transfers will go user space -> buffer -> VME. Larger (more than a |
| 247 | * page) transfers will lock the user space buffer into memory and then |
| 248 | * transfer the data directly from the user space buffers out to VME. |
| 249 | */ |
Emilio G. Cota | 1a85f20 | 2010-11-12 11:15:34 +0000 | [diff] [blame] | 250 | static ssize_t resource_from_user(unsigned int minor, const char __user *buf, |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 251 | size_t count, loff_t *ppos) |
| 252 | { |
| 253 | ssize_t retval; |
| 254 | ssize_t copied = 0; |
| 255 | |
| 256 | if (count <= image[minor].size_buf) { |
| 257 | retval = __copy_from_user(image[minor].kern_buf, buf, |
| 258 | (unsigned long)count); |
| 259 | if (retval != 0) |
| 260 | copied = (copied - retval); |
| 261 | else |
| 262 | copied = count; |
| 263 | |
| 264 | copied = vme_master_write(image[minor].resource, |
| 265 | image[minor].kern_buf, copied, *ppos); |
| 266 | } else { |
| 267 | /* XXX Need to write this */ |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 268 | printk(KERN_INFO "Currently don't support large transfers\n"); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 269 | /* Map in pages from userspace */ |
| 270 | |
| 271 | /* Call vme_master_write to do the transfer */ |
| 272 | return -EINVAL; |
| 273 | } |
| 274 | |
| 275 | return copied; |
| 276 | } |
| 277 | |
| 278 | static ssize_t buffer_to_user(unsigned int minor, char __user *buf, |
| 279 | size_t count, loff_t *ppos) |
| 280 | { |
Emilio G. Cota | 0a81a0f | 2010-11-12 11:15:27 +0000 | [diff] [blame] | 281 | void *image_ptr; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 282 | ssize_t retval; |
| 283 | |
| 284 | image_ptr = image[minor].kern_buf + *ppos; |
| 285 | |
| 286 | retval = __copy_to_user(buf, image_ptr, (unsigned long)count); |
| 287 | if (retval != 0) { |
| 288 | retval = (count - retval); |
| 289 | printk(KERN_WARNING "Partial copy to userspace\n"); |
| 290 | } else |
| 291 | retval = count; |
| 292 | |
| 293 | /* Return number of bytes successfully read */ |
| 294 | return retval; |
| 295 | } |
| 296 | |
Emilio G. Cota | 1a85f20 | 2010-11-12 11:15:34 +0000 | [diff] [blame] | 297 | static ssize_t buffer_from_user(unsigned int minor, const char __user *buf, |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 298 | size_t count, loff_t *ppos) |
| 299 | { |
Emilio G. Cota | 0a81a0f | 2010-11-12 11:15:27 +0000 | [diff] [blame] | 300 | void *image_ptr; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 301 | size_t retval; |
| 302 | |
| 303 | image_ptr = image[minor].kern_buf + *ppos; |
| 304 | |
| 305 | retval = __copy_from_user(image_ptr, buf, (unsigned long)count); |
| 306 | if (retval != 0) { |
| 307 | retval = (count - retval); |
| 308 | printk(KERN_WARNING "Partial copy to userspace\n"); |
| 309 | } else |
| 310 | retval = count; |
| 311 | |
| 312 | /* Return number of bytes successfully read */ |
| 313 | return retval; |
| 314 | } |
| 315 | |
Emilio G. Cota | 1a85f20 | 2010-11-12 11:15:34 +0000 | [diff] [blame] | 316 | static ssize_t vme_user_read(struct file *file, char __user *buf, size_t count, |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 317 | loff_t *ppos) |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 318 | { |
| 319 | unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev); |
| 320 | ssize_t retval; |
| 321 | size_t image_size; |
| 322 | size_t okcount; |
| 323 | |
Vincent Bossier | 05614fb | 2011-06-09 09:20:31 +0100 | [diff] [blame] | 324 | if (minor == CONTROL_MINOR) |
| 325 | return 0; |
| 326 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 327 | down(&image[minor].sem); |
| 328 | |
| 329 | /* XXX Do we *really* want this helper - we can use vme_*_get ? */ |
| 330 | image_size = vme_get_size(image[minor].resource); |
| 331 | |
| 332 | /* Ensure we are starting at a valid location */ |
| 333 | if ((*ppos < 0) || (*ppos > (image_size - 1))) { |
| 334 | up(&image[minor].sem); |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | /* Ensure not reading past end of the image */ |
| 339 | if (*ppos + count > image_size) |
| 340 | okcount = image_size - *ppos; |
| 341 | else |
| 342 | okcount = count; |
| 343 | |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 344 | switch (type[minor]) { |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 345 | case MASTER_MINOR: |
| 346 | retval = resource_to_user(minor, buf, okcount, ppos); |
| 347 | break; |
| 348 | case SLAVE_MINOR: |
| 349 | retval = buffer_to_user(minor, buf, okcount, ppos); |
| 350 | break; |
| 351 | default: |
| 352 | retval = -EINVAL; |
| 353 | } |
| 354 | |
| 355 | up(&image[minor].sem); |
| 356 | |
| 357 | if (retval > 0) |
| 358 | *ppos += retval; |
| 359 | |
| 360 | return retval; |
| 361 | } |
| 362 | |
Emilio G. Cota | 1a85f20 | 2010-11-12 11:15:34 +0000 | [diff] [blame] | 363 | static ssize_t vme_user_write(struct file *file, const char __user *buf, |
| 364 | size_t count, loff_t *ppos) |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 365 | { |
| 366 | unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev); |
| 367 | ssize_t retval; |
| 368 | size_t image_size; |
| 369 | size_t okcount; |
| 370 | |
Vincent Bossier | 05614fb | 2011-06-09 09:20:31 +0100 | [diff] [blame] | 371 | if (minor == CONTROL_MINOR) |
| 372 | return 0; |
| 373 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 374 | down(&image[minor].sem); |
| 375 | |
| 376 | image_size = vme_get_size(image[minor].resource); |
| 377 | |
| 378 | /* Ensure we are starting at a valid location */ |
| 379 | if ((*ppos < 0) || (*ppos > (image_size - 1))) { |
| 380 | up(&image[minor].sem); |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | /* Ensure not reading past end of the image */ |
| 385 | if (*ppos + count > image_size) |
| 386 | okcount = image_size - *ppos; |
| 387 | else |
| 388 | okcount = count; |
| 389 | |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 390 | switch (type[minor]) { |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 391 | case MASTER_MINOR: |
| 392 | retval = resource_from_user(minor, buf, okcount, ppos); |
| 393 | break; |
| 394 | case SLAVE_MINOR: |
| 395 | retval = buffer_from_user(minor, buf, okcount, ppos); |
| 396 | break; |
| 397 | default: |
| 398 | retval = -EINVAL; |
| 399 | } |
| 400 | |
| 401 | up(&image[minor].sem); |
| 402 | |
| 403 | if (retval > 0) |
| 404 | *ppos += retval; |
| 405 | |
| 406 | return retval; |
| 407 | } |
| 408 | |
| 409 | static loff_t vme_user_llseek(struct file *file, loff_t off, int whence) |
| 410 | { |
Arthur Benilov | 877de4b | 2010-02-16 15:40:30 +0100 | [diff] [blame] | 411 | loff_t absolute = -1; |
| 412 | unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev); |
| 413 | size_t image_size; |
| 414 | |
Vincent Bossier | 05614fb | 2011-06-09 09:20:31 +0100 | [diff] [blame] | 415 | if (minor == CONTROL_MINOR) |
| 416 | return -EINVAL; |
| 417 | |
Arthur Benilov | 877de4b | 2010-02-16 15:40:30 +0100 | [diff] [blame] | 418 | down(&image[minor].sem); |
| 419 | image_size = vme_get_size(image[minor].resource); |
| 420 | |
| 421 | switch (whence) { |
| 422 | case SEEK_SET: |
| 423 | absolute = off; |
| 424 | break; |
| 425 | case SEEK_CUR: |
| 426 | absolute = file->f_pos + off; |
| 427 | break; |
| 428 | case SEEK_END: |
| 429 | absolute = image_size + off; |
| 430 | break; |
| 431 | default: |
| 432 | up(&image[minor].sem); |
| 433 | return -EINVAL; |
| 434 | break; |
| 435 | } |
| 436 | |
| 437 | if ((absolute < 0) || (absolute >= image_size)) { |
| 438 | up(&image[minor].sem); |
| 439 | return -EINVAL; |
| 440 | } |
| 441 | |
| 442 | file->f_pos = absolute; |
| 443 | |
| 444 | up(&image[minor].sem); |
| 445 | |
| 446 | return absolute; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 447 | } |
| 448 | |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 449 | /* |
| 450 | * The ioctls provided by the old VME access method (the one at vmelinux.org) |
| 451 | * are most certainly wrong as the effectively push the registers layout |
| 452 | * through to user space. Given that the VME core can handle multiple bridges, |
| 453 | * with different register layouts this is most certainly not the way to go. |
| 454 | * |
| 455 | * We aren't using the structures defined in the Motorola driver either - these |
| 456 | * are also quite low level, however we should use the definitions that have |
| 457 | * already been defined. |
| 458 | */ |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 459 | static int vme_user_ioctl(struct inode *inode, struct file *file, |
| 460 | unsigned int cmd, unsigned long arg) |
| 461 | { |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 462 | struct vme_master master; |
| 463 | struct vme_slave slave; |
Vincent Bossier | dca2218 | 2011-06-09 15:49:30 +0200 | [diff] [blame] | 464 | struct vme_irq_id irq_req; |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 465 | unsigned long copied; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 466 | unsigned int minor = MINOR(inode->i_rdev); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 467 | int retval; |
| 468 | dma_addr_t pci_addr; |
Emilio G. Cota | 1a85f20 | 2010-11-12 11:15:34 +0000 | [diff] [blame] | 469 | void __user *argp = (void __user *)arg; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 470 | |
| 471 | statistics.ioctls++; |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 472 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 473 | switch (type[minor]) { |
| 474 | case CONTROL_MINOR: |
Vincent Bossier | dca2218 | 2011-06-09 15:49:30 +0200 | [diff] [blame] | 475 | switch (cmd) { |
| 476 | case VME_IRQ_GEN: |
| 477 | copied = copy_from_user(&irq_req, (char *)arg, |
| 478 | sizeof(struct vme_irq_id)); |
| 479 | if (copied != 0) { |
| 480 | printk(KERN_WARNING "Partial copy from userspace\n"); |
| 481 | return -EFAULT; |
| 482 | } |
| 483 | |
| 484 | retval = vme_irq_generate(vme_user_bridge, |
| 485 | irq_req.level, |
| 486 | irq_req.statid); |
| 487 | |
| 488 | return retval; |
| 489 | } |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 490 | break; |
| 491 | case MASTER_MINOR: |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 492 | switch (cmd) { |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 493 | case VME_GET_MASTER: |
| 494 | memset(&master, 0, sizeof(struct vme_master)); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 495 | |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 496 | /* XXX We do not want to push aspace, cycle and width |
| 497 | * to userspace as they are |
| 498 | */ |
| 499 | retval = vme_master_get(image[minor].resource, |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 500 | &master.enable, &master.vme_addr, |
| 501 | &master.size, &master.aspace, |
| 502 | &master.cycle, &master.dwidth); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 503 | |
Emilio G. Cota | 1a85f20 | 2010-11-12 11:15:34 +0000 | [diff] [blame] | 504 | copied = copy_to_user(argp, &master, |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 505 | sizeof(struct vme_master)); |
| 506 | if (copied != 0) { |
| 507 | printk(KERN_WARNING "Partial copy to " |
| 508 | "userspace\n"); |
| 509 | return -EFAULT; |
| 510 | } |
| 511 | |
| 512 | return retval; |
| 513 | break; |
| 514 | |
| 515 | case VME_SET_MASTER: |
| 516 | |
Emilio G. Cota | 1a85f20 | 2010-11-12 11:15:34 +0000 | [diff] [blame] | 517 | copied = copy_from_user(&master, argp, sizeof(master)); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 518 | if (copied != 0) { |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 519 | printk(KERN_WARNING "Partial copy from " |
| 520 | "userspace\n"); |
| 521 | return -EFAULT; |
| 522 | } |
| 523 | |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 524 | /* XXX We do not want to push aspace, cycle and width |
| 525 | * to userspace as they are |
| 526 | */ |
| 527 | return vme_master_set(image[minor].resource, |
| 528 | master.enable, master.vme_addr, master.size, |
| 529 | master.aspace, master.cycle, master.dwidth); |
| 530 | |
| 531 | break; |
| 532 | } |
| 533 | break; |
| 534 | case SLAVE_MINOR: |
| 535 | switch (cmd) { |
| 536 | case VME_GET_SLAVE: |
| 537 | memset(&slave, 0, sizeof(struct vme_slave)); |
| 538 | |
| 539 | /* XXX We do not want to push aspace, cycle and width |
| 540 | * to userspace as they are |
| 541 | */ |
| 542 | retval = vme_slave_get(image[minor].resource, |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 543 | &slave.enable, &slave.vme_addr, |
| 544 | &slave.size, &pci_addr, &slave.aspace, |
| 545 | &slave.cycle); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 546 | |
Emilio G. Cota | 1a85f20 | 2010-11-12 11:15:34 +0000 | [diff] [blame] | 547 | copied = copy_to_user(argp, &slave, |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 548 | sizeof(struct vme_slave)); |
| 549 | if (copied != 0) { |
| 550 | printk(KERN_WARNING "Partial copy to " |
| 551 | "userspace\n"); |
| 552 | return -EFAULT; |
| 553 | } |
| 554 | |
| 555 | return retval; |
| 556 | break; |
| 557 | |
| 558 | case VME_SET_SLAVE: |
| 559 | |
Emilio G. Cota | 1a85f20 | 2010-11-12 11:15:34 +0000 | [diff] [blame] | 560 | copied = copy_from_user(&slave, argp, sizeof(slave)); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 561 | if (copied != 0) { |
| 562 | printk(KERN_WARNING "Partial copy from " |
| 563 | "userspace\n"); |
| 564 | return -EFAULT; |
| 565 | } |
| 566 | |
| 567 | /* XXX We do not want to push aspace, cycle and width |
| 568 | * to userspace as they are |
| 569 | */ |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 570 | return vme_slave_set(image[minor].resource, |
| 571 | slave.enable, slave.vme_addr, slave.size, |
| 572 | image[minor].pci_buf, slave.aspace, |
| 573 | slave.cycle); |
| 574 | |
| 575 | break; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 576 | } |
| 577 | break; |
| 578 | } |
| 579 | |
| 580 | return -EINVAL; |
| 581 | } |
| 582 | |
Arnd Bergmann | b1f2ac0 | 2010-04-27 20:15:07 +0200 | [diff] [blame] | 583 | static long |
| 584 | vme_user_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 585 | { |
| 586 | int ret; |
| 587 | |
Arnd Bergmann | 8e2394a | 2010-07-11 23:18:52 +0200 | [diff] [blame] | 588 | mutex_lock(&vme_user_mutex); |
Arnd Bergmann | b1f2ac0 | 2010-04-27 20:15:07 +0200 | [diff] [blame] | 589 | ret = vme_user_ioctl(file->f_path.dentry->d_inode, file, cmd, arg); |
Arnd Bergmann | 8e2394a | 2010-07-11 23:18:52 +0200 | [diff] [blame] | 590 | mutex_unlock(&vme_user_mutex); |
Arnd Bergmann | b1f2ac0 | 2010-04-27 20:15:07 +0200 | [diff] [blame] | 591 | |
| 592 | return ret; |
| 593 | } |
| 594 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 595 | |
| 596 | /* |
| 597 | * Unallocate a previously allocated buffer |
| 598 | */ |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 599 | static void buf_unalloc(int num) |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 600 | { |
| 601 | if (image[num].kern_buf) { |
| 602 | #ifdef VME_DEBUG |
| 603 | printk(KERN_DEBUG "UniverseII:Releasing buffer at %p\n", |
| 604 | image[num].pci_buf); |
| 605 | #endif |
| 606 | |
| 607 | vme_free_consistent(image[num].resource, image[num].size_buf, |
| 608 | image[num].kern_buf, image[num].pci_buf); |
| 609 | |
| 610 | image[num].kern_buf = NULL; |
| 611 | image[num].pci_buf = 0; |
| 612 | image[num].size_buf = 0; |
| 613 | |
| 614 | #ifdef VME_DEBUG |
| 615 | } else { |
| 616 | printk(KERN_DEBUG "UniverseII: Buffer not allocated\n"); |
| 617 | #endif |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | static struct vme_driver vme_user_driver = { |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 622 | .name = driver_name, |
| 623 | .probe = vme_user_probe, |
Emilio G. Cota | 4740a08 | 2010-12-03 13:44:15 +0000 | [diff] [blame] | 624 | .remove = __devexit_p(vme_user_remove), |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 625 | }; |
| 626 | |
| 627 | |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 628 | static int __init vme_user_init(void) |
| 629 | { |
| 630 | int retval = 0; |
| 631 | int i; |
| 632 | struct vme_device_id *ids; |
| 633 | |
| 634 | printk(KERN_INFO "VME User Space Access Driver\n"); |
| 635 | |
| 636 | if (bus_num == 0) { |
| 637 | printk(KERN_ERR "%s: No cards, skipping registration\n", |
| 638 | driver_name); |
Emilio G. Cota | 55db502 | 2010-11-12 11:14:14 +0000 | [diff] [blame] | 639 | retval = -ENODEV; |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 640 | goto err_nocard; |
| 641 | } |
| 642 | |
| 643 | /* Let's start by supporting one bus, we can support more than one |
| 644 | * in future revisions if that ever becomes necessary. |
| 645 | */ |
| 646 | if (bus_num > USER_BUS_MAX) { |
Martyn Welch | 51616e2 | 2009-12-15 08:42:43 +0000 | [diff] [blame] | 647 | printk(KERN_ERR "%s: Driver only able to handle %d buses\n", |
| 648 | driver_name, USER_BUS_MAX); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 649 | bus_num = USER_BUS_MAX; |
| 650 | } |
| 651 | |
| 652 | |
| 653 | /* Dynamically create the bind table based on module parameters */ |
Manohar Vanga | 34a6781 | 2011-08-01 12:20:46 +0200 | [diff] [blame] | 654 | ids = kzalloc(sizeof(struct vme_device_id) * (bus_num + 1), GFP_KERNEL); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 655 | if (ids == NULL) { |
| 656 | printk(KERN_ERR "%s: Unable to allocate ID table\n", |
| 657 | driver_name); |
Emilio G. Cota | 55db502 | 2010-11-12 11:14:14 +0000 | [diff] [blame] | 658 | retval = -ENOMEM; |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 659 | goto err_id; |
| 660 | } |
| 661 | |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 662 | for (i = 0; i < bus_num; i++) { |
| 663 | ids[i].bus = bus[i]; |
| 664 | /* |
| 665 | * We register the driver against the slot occupied by *this* |
| 666 | * card, since it's really a low level way of controlling |
| 667 | * the VME bridge |
| 668 | */ |
| 669 | ids[i].slot = VME_SLOT_CURRENT; |
| 670 | } |
| 671 | |
| 672 | vme_user_driver.bind_table = ids; |
| 673 | |
| 674 | retval = vme_register_driver(&vme_user_driver); |
| 675 | if (retval != 0) |
| 676 | goto err_reg; |
| 677 | |
| 678 | return retval; |
| 679 | |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 680 | err_reg: |
| 681 | kfree(ids); |
| 682 | err_id: |
| 683 | err_nocard: |
| 684 | return retval; |
| 685 | } |
| 686 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 687 | /* |
| 688 | * In this simple access driver, the old behaviour is being preserved as much |
| 689 | * as practical. We will therefore reserve the buffers and request the images |
| 690 | * here so that we don't have to do it later. |
| 691 | */ |
Emilio G. Cota | 4740a08 | 2010-12-03 13:44:15 +0000 | [diff] [blame] | 692 | static int __devinit vme_user_probe(struct device *dev, int cur_bus, |
| 693 | int cur_slot) |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 694 | { |
| 695 | int i, err; |
Martyn Welch | beb9ccc | 2009-10-29 16:34:48 +0000 | [diff] [blame] | 696 | char name[12]; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 697 | |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 698 | /* Save pointer to the bridge device */ |
| 699 | if (vme_user_bridge != NULL) { |
| 700 | printk(KERN_ERR "%s: Driver can only be loaded for 1 device\n", |
| 701 | driver_name); |
| 702 | err = -EINVAL; |
| 703 | goto err_dev; |
| 704 | } |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 705 | vme_user_bridge = dev; |
| 706 | |
| 707 | /* Initialise descriptors */ |
| 708 | for (i = 0; i < VME_DEVS; i++) { |
| 709 | image[i].kern_buf = NULL; |
| 710 | image[i].pci_buf = 0; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 711 | sema_init(&image[i].sem, 1); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 712 | image[i].device = NULL; |
| 713 | image[i].resource = NULL; |
| 714 | image[i].users = 0; |
| 715 | } |
| 716 | |
| 717 | /* Initialise statistics counters */ |
| 718 | reset_counters(); |
| 719 | |
| 720 | /* Assign major and minor numbers for the driver */ |
| 721 | err = register_chrdev_region(MKDEV(VME_MAJOR, 0), VME_DEVS, |
| 722 | driver_name); |
| 723 | if (err) { |
| 724 | printk(KERN_WARNING "%s: Error getting Major Number %d for " |
| 725 | "driver.\n", driver_name, VME_MAJOR); |
| 726 | goto err_region; |
| 727 | } |
| 728 | |
| 729 | /* Register the driver as a char device */ |
| 730 | vme_user_cdev = cdev_alloc(); |
| 731 | vme_user_cdev->ops = &vme_user_fops; |
| 732 | vme_user_cdev->owner = THIS_MODULE; |
| 733 | err = cdev_add(vme_user_cdev, MKDEV(VME_MAJOR, 0), VME_DEVS); |
| 734 | if (err) { |
| 735 | printk(KERN_WARNING "%s: cdev_all failed\n", driver_name); |
| 736 | goto err_char; |
| 737 | } |
| 738 | |
| 739 | /* Request slave resources and allocate buffers (128kB wide) */ |
| 740 | for (i = SLAVE_MINOR; i < (SLAVE_MAX + 1); i++) { |
| 741 | /* XXX Need to properly request attributes */ |
Arthur Benilov | 5188d74 | 2010-02-16 15:40:58 +0100 | [diff] [blame] | 742 | /* For ca91cx42 bridge there are only two slave windows |
| 743 | * supporting A16 addressing, so we request A24 supported |
| 744 | * by all windows. |
| 745 | */ |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 746 | image[i].resource = vme_slave_request(vme_user_bridge, |
Arthur Benilov | 5188d74 | 2010-02-16 15:40:58 +0100 | [diff] [blame] | 747 | VME_A24, VME_SCT); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 748 | if (image[i].resource == NULL) { |
| 749 | printk(KERN_WARNING "Unable to allocate slave " |
| 750 | "resource\n"); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 751 | goto err_slave; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 752 | } |
| 753 | image[i].size_buf = PCI_BUF_SIZE; |
| 754 | image[i].kern_buf = vme_alloc_consistent(image[i].resource, |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 755 | image[i].size_buf, &image[i].pci_buf); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 756 | if (image[i].kern_buf == NULL) { |
| 757 | printk(KERN_WARNING "Unable to allocate memory for " |
| 758 | "buffer\n"); |
| 759 | image[i].pci_buf = 0; |
| 760 | vme_slave_free(image[i].resource); |
| 761 | err = -ENOMEM; |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 762 | goto err_slave; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 763 | } |
| 764 | } |
| 765 | |
| 766 | /* |
| 767 | * Request master resources allocate page sized buffers for small |
| 768 | * reads and writes |
| 769 | */ |
| 770 | for (i = MASTER_MINOR; i < (MASTER_MAX + 1); i++) { |
| 771 | /* XXX Need to properly request attributes */ |
| 772 | image[i].resource = vme_master_request(vme_user_bridge, |
| 773 | VME_A32, VME_SCT, VME_D32); |
| 774 | if (image[i].resource == NULL) { |
| 775 | printk(KERN_WARNING "Unable to allocate master " |
| 776 | "resource\n"); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 777 | goto err_master; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 778 | } |
Arthur Benilov | 33e920d | 2010-02-16 15:41:21 +0100 | [diff] [blame] | 779 | image[i].size_buf = PCI_BUF_SIZE; |
| 780 | image[i].kern_buf = kmalloc(image[i].size_buf, GFP_KERNEL); |
| 781 | if (image[i].kern_buf == NULL) { |
| 782 | printk(KERN_WARNING "Unable to allocate memory for " |
| 783 | "master window buffers\n"); |
| 784 | err = -ENOMEM; |
| 785 | goto err_master_buf; |
| 786 | } |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | /* Create sysfs entries - on udev systems this creates the dev files */ |
| 790 | vme_user_sysfs_class = class_create(THIS_MODULE, driver_name); |
| 791 | if (IS_ERR(vme_user_sysfs_class)) { |
| 792 | printk(KERN_ERR "Error creating vme_user class.\n"); |
| 793 | err = PTR_ERR(vme_user_sysfs_class); |
| 794 | goto err_class; |
| 795 | } |
| 796 | |
| 797 | /* Add sysfs Entries */ |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 798 | for (i = 0; i < VME_DEVS; i++) { |
Vincent Bossier | 584721c | 2011-06-03 10:07:39 +0100 | [diff] [blame] | 799 | int num; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 800 | switch (type[i]) { |
| 801 | case MASTER_MINOR: |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 802 | sprintf(name, "bus/vme/m%%d"); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 803 | break; |
| 804 | case CONTROL_MINOR: |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 805 | sprintf(name, "bus/vme/ctl"); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 806 | break; |
| 807 | case SLAVE_MINOR: |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 808 | sprintf(name, "bus/vme/s%%d"); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 809 | break; |
| 810 | default: |
| 811 | err = -EINVAL; |
| 812 | goto err_sysfs; |
| 813 | break; |
| 814 | } |
| 815 | |
Vincent Bossier | 584721c | 2011-06-03 10:07:39 +0100 | [diff] [blame] | 816 | num = (type[i] == SLAVE_MINOR) ? i - (MASTER_MAX + 1) : i; |
| 817 | image[i].device = device_create(vme_user_sysfs_class, NULL, |
| 818 | MKDEV(VME_MAJOR, i), NULL, name, num); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 819 | if (IS_ERR(image[i].device)) { |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 820 | printk(KERN_INFO "%s: Error creating sysfs device\n", |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 821 | driver_name); |
| 822 | err = PTR_ERR(image[i].device); |
| 823 | goto err_sysfs; |
| 824 | } |
| 825 | } |
| 826 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 827 | return 0; |
| 828 | |
| 829 | /* Ensure counter set correcty to destroy all sysfs devices */ |
| 830 | i = VME_DEVS; |
| 831 | err_sysfs: |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 832 | while (i > 0) { |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 833 | i--; |
| 834 | device_destroy(vme_user_sysfs_class, MKDEV(VME_MAJOR, i)); |
| 835 | } |
| 836 | class_destroy(vme_user_sysfs_class); |
| 837 | |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 838 | /* Ensure counter set correcty to unalloc all master windows */ |
| 839 | i = MASTER_MAX + 1; |
Arthur Benilov | 33e920d | 2010-02-16 15:41:21 +0100 | [diff] [blame] | 840 | err_master_buf: |
| 841 | for (i = MASTER_MINOR; i < (MASTER_MAX + 1); i++) |
| 842 | kfree(image[i].kern_buf); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 843 | err_master: |
| 844 | while (i > MASTER_MINOR) { |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 845 | i--; |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 846 | vme_master_free(image[i].resource); |
| 847 | } |
| 848 | |
| 849 | /* |
| 850 | * Ensure counter set correcty to unalloc all slave windows and buffers |
| 851 | */ |
| 852 | i = SLAVE_MAX + 1; |
| 853 | err_slave: |
| 854 | while (i > SLAVE_MINOR) { |
| 855 | i--; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 856 | buf_unalloc(i); |
Emilio G. Cota | 1daa38d | 2010-12-03 09:05:08 +0000 | [diff] [blame] | 857 | vme_slave_free(image[i].resource); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 858 | } |
| 859 | err_class: |
| 860 | cdev_del(vme_user_cdev); |
| 861 | err_char: |
| 862 | unregister_chrdev_region(MKDEV(VME_MAJOR, 0), VME_DEVS); |
| 863 | err_region: |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 864 | err_dev: |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 865 | return err; |
| 866 | } |
| 867 | |
Emilio G. Cota | 4740a08 | 2010-12-03 13:44:15 +0000 | [diff] [blame] | 868 | static int __devexit vme_user_remove(struct device *dev, int cur_bus, |
| 869 | int cur_slot) |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 870 | { |
| 871 | int i; |
| 872 | |
| 873 | /* Remove sysfs Entries */ |
Nanakos Chrysostomos | 45f9f01 | 2010-05-28 10:54:45 +0000 | [diff] [blame] | 874 | for (i = 0; i < VME_DEVS; i++) |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 875 | device_destroy(vme_user_sysfs_class, MKDEV(VME_MAJOR, i)); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 876 | class_destroy(vme_user_sysfs_class); |
| 877 | |
Emilio G. Cota | b62c99b | 2010-12-03 14:20:51 +0000 | [diff] [blame] | 878 | for (i = MASTER_MINOR; i < (MASTER_MAX + 1); i++) { |
Arthur Benilov | 33e920d | 2010-02-16 15:41:21 +0100 | [diff] [blame] | 879 | kfree(image[i].kern_buf); |
Emilio G. Cota | b62c99b | 2010-12-03 14:20:51 +0000 | [diff] [blame] | 880 | vme_master_free(image[i].resource); |
| 881 | } |
Arthur Benilov | 33e920d | 2010-02-16 15:41:21 +0100 | [diff] [blame] | 882 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 883 | for (i = SLAVE_MINOR; i < (SLAVE_MAX + 1); i++) { |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 884 | vme_slave_set(image[i].resource, 0, 0, 0, 0, VME_A32, 0); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 885 | buf_unalloc(i); |
Emilio G. Cota | 1daa38d | 2010-12-03 09:05:08 +0000 | [diff] [blame] | 886 | vme_slave_free(image[i].resource); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | /* Unregister device driver */ |
| 890 | cdev_del(vme_user_cdev); |
| 891 | |
| 892 | /* Unregiser the major and minor device numbers */ |
| 893 | unregister_chrdev_region(MKDEV(VME_MAJOR, 0), VME_DEVS); |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 894 | |
| 895 | return 0; |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 896 | } |
| 897 | |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 898 | static void __exit vme_user_exit(void) |
| 899 | { |
| 900 | vme_unregister_driver(&vme_user_driver); |
| 901 | |
| 902 | kfree(vme_user_driver.bind_table); |
| 903 | } |
| 904 | |
| 905 | |
| 906 | MODULE_PARM_DESC(bus, "Enumeration of VMEbus to which the driver is connected"); |
| 907 | module_param_array(bus, int, &bus_num, 0); |
| 908 | |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 909 | MODULE_DESCRIPTION("VME User Space Access Driver"); |
Martyn Welch | 66bd8db | 2010-02-18 15:12:52 +0000 | [diff] [blame] | 910 | MODULE_AUTHOR("Martyn Welch <martyn.welch@ge.com"); |
Martyn Welch | f00a86d | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 911 | MODULE_LICENSE("GPL"); |
| 912 | |
Martyn Welch | 238add5 | 2009-08-11 14:37:15 +0100 | [diff] [blame] | 913 | module_init(vme_user_init); |
| 914 | module_exit(vme_user_exit); |