Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
| 6 | #include "linux/sched.h" |
| 7 | #include "linux/slab.h" |
| 8 | #include "linux/list.h" |
| 9 | #include "linux/kd.h" |
| 10 | #include "linux/interrupt.h" |
| 11 | #include "linux/devfs_fs_kernel.h" |
| 12 | #include "asm/uaccess.h" |
| 13 | #include "chan_kern.h" |
| 14 | #include "irq_user.h" |
| 15 | #include "line.h" |
| 16 | #include "kern.h" |
| 17 | #include "user_util.h" |
| 18 | #include "kern_util.h" |
| 19 | #include "os.h" |
| 20 | #include "irq_kern.h" |
| 21 | |
| 22 | #define LINE_BUFSIZE 4096 |
| 23 | |
| 24 | static irqreturn_t line_interrupt(int irq, void *data, struct pt_regs *unused) |
| 25 | { |
| 26 | struct tty_struct *tty = data; |
| 27 | struct line *line = tty->driver_data; |
| 28 | |
| 29 | if (line) |
| 30 | chan_interrupt(&line->chan_list, &line->task, tty, irq); |
| 31 | return IRQ_HANDLED; |
| 32 | } |
| 33 | |
| 34 | static void line_timer_cb(void *arg) |
| 35 | { |
| 36 | struct tty_struct *tty = arg; |
| 37 | struct line *line = tty->driver_data; |
| 38 | |
| 39 | line_interrupt(line->driver->read_irq, arg, NULL); |
| 40 | } |
| 41 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 42 | /* Returns the free space inside the ring buffer of this line. |
| 43 | * |
| 44 | * Should be called while holding line->lock (this does not modify datas). |
| 45 | */ |
| 46 | static int write_room(struct line *line) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | { |
| 48 | int n; |
| 49 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 50 | if (line->buffer == NULL) |
| 51 | return LINE_BUFSIZE - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 53 | /* This is for the case where the buffer is wrapped! */ |
| 54 | n = line->head - line->tail; |
| 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | if (n <= 0) |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 57 | n = LINE_BUFSIZE + n; /* The other case */ |
| 58 | return n - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | } |
| 60 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 61 | int line_write_room(struct tty_struct *tty) |
| 62 | { |
| 63 | struct line *line = tty->driver_data; |
| 64 | unsigned long flags; |
| 65 | int room; |
| 66 | |
| 67 | if (tty->stopped) |
| 68 | return 0; |
| 69 | |
| 70 | spin_lock_irqsave(&line->lock, flags); |
| 71 | room = write_room(line); |
| 72 | spin_unlock_irqrestore(&line->lock, flags); |
| 73 | |
| 74 | /*XXX: Warning to remove */ |
| 75 | if (0 == room) |
| 76 | printk(KERN_DEBUG "%s: %s: no room left in buffer\n", |
| 77 | __FUNCTION__,tty->name); |
| 78 | return room; |
| 79 | } |
| 80 | |
| 81 | int line_chars_in_buffer(struct tty_struct *tty) |
| 82 | { |
| 83 | struct line *line = tty->driver_data; |
| 84 | unsigned long flags; |
| 85 | int ret; |
| 86 | |
| 87 | spin_lock_irqsave(&line->lock, flags); |
| 88 | |
| 89 | /*write_room subtracts 1 for the needed NULL, so we readd it.*/ |
| 90 | ret = LINE_BUFSIZE - (write_room(line) + 1); |
| 91 | spin_unlock_irqrestore(&line->lock, flags); |
| 92 | |
| 93 | return ret; |
| 94 | } |
| 95 | |
| 96 | /* |
| 97 | * This copies the content of buf into the circular buffer associated with |
| 98 | * this line. |
| 99 | * The return value is the number of characters actually copied, i.e. the ones |
| 100 | * for which there was space: this function is not supposed to ever flush out |
| 101 | * the circular buffer. |
| 102 | * |
| 103 | * Must be called while holding line->lock! |
| 104 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | static int buffer_data(struct line *line, const char *buf, int len) |
| 106 | { |
| 107 | int end, room; |
| 108 | |
| 109 | if(line->buffer == NULL){ |
| 110 | line->buffer = kmalloc(LINE_BUFSIZE, GFP_ATOMIC); |
| 111 | if (line->buffer == NULL) { |
| 112 | printk("buffer_data - atomic allocation failed\n"); |
| 113 | return(0); |
| 114 | } |
| 115 | line->head = line->buffer; |
| 116 | line->tail = line->buffer; |
| 117 | } |
| 118 | |
| 119 | room = write_room(line); |
| 120 | len = (len > room) ? room : len; |
| 121 | |
| 122 | end = line->buffer + LINE_BUFSIZE - line->tail; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 123 | |
| 124 | if (len < end){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | memcpy(line->tail, buf, len); |
| 126 | line->tail += len; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 127 | } else { |
| 128 | /* The circular buffer is wrapping */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | memcpy(line->tail, buf, end); |
| 130 | buf += end; |
| 131 | memcpy(line->buffer, buf, len - end); |
| 132 | line->tail = line->buffer + len - end; |
| 133 | } |
| 134 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 135 | return len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } |
| 137 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 138 | /* |
| 139 | * Flushes the ring buffer to the output channels. That is, write_chan is |
| 140 | * called, passing it line->head as buffer, and an appropriate count. |
| 141 | * |
| 142 | * On exit, returns 1 when the buffer is empty, |
| 143 | * 0 when the buffer is not empty on exit, |
| 144 | * and -errno when an error occurred. |
| 145 | * |
| 146 | * Must be called while holding line->lock!*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | static int flush_buffer(struct line *line) |
| 148 | { |
| 149 | int n, count; |
| 150 | |
| 151 | if ((line->buffer == NULL) || (line->head == line->tail)) |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 152 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
| 154 | if (line->tail < line->head) { |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 155 | /* line->buffer + LINE_BUFSIZE is the end of the buffer! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | count = line->buffer + LINE_BUFSIZE - line->head; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | n = write_chan(&line->chan_list, line->head, count, |
| 159 | line->driver->write_irq); |
| 160 | if (n < 0) |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 161 | return n; |
| 162 | if (n == count) { |
| 163 | /* We have flushed from ->head to buffer end, now we |
| 164 | * must flush only from the beginning to ->tail.*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | line->head = line->buffer; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 166 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | line->head += n; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 168 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | } |
| 170 | } |
| 171 | |
| 172 | count = line->tail - line->head; |
| 173 | n = write_chan(&line->chan_list, line->head, count, |
| 174 | line->driver->write_irq); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 175 | |
| 176 | if(n < 0) |
| 177 | return n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | line->head += n; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 180 | return line->head == line->tail; |
| 181 | } |
| 182 | |
| 183 | void line_flush_buffer(struct tty_struct *tty) |
| 184 | { |
| 185 | struct line *line = tty->driver_data; |
| 186 | unsigned long flags; |
| 187 | int err; |
| 188 | |
| 189 | /*XXX: copied from line_write, verify if it is correct!*/ |
| 190 | if(tty->stopped) |
| 191 | return; |
| 192 | //return 0; |
| 193 | |
| 194 | spin_lock_irqsave(&line->lock, flags); |
| 195 | err = flush_buffer(line); |
| 196 | /*if (err == 1) |
| 197 | err = 0;*/ |
| 198 | spin_unlock_irqrestore(&line->lock, flags); |
| 199 | //return err; |
| 200 | } |
| 201 | |
| 202 | /* We map both ->flush_chars and ->put_char (which go in pair) onto ->flush_buffer |
| 203 | * and ->write. Hope it's not that bad.*/ |
| 204 | void line_flush_chars(struct tty_struct *tty) |
| 205 | { |
| 206 | line_flush_buffer(tty); |
| 207 | } |
| 208 | |
| 209 | void line_put_char(struct tty_struct *tty, unsigned char ch) |
| 210 | { |
| 211 | line_write(tty, &ch, sizeof(ch)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | int line_write(struct tty_struct *tty, const unsigned char *buf, int len) |
| 215 | { |
| 216 | struct line *line = tty->driver_data; |
| 217 | unsigned long flags; |
| 218 | int n, err, ret = 0; |
| 219 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 220 | if(tty->stopped) |
| 221 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 223 | spin_lock_irqsave(&line->lock, flags); |
| 224 | if (line->head != line->tail) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | ret = buffer_data(line, buf, len); |
| 226 | err = flush_buffer(line); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 227 | if (err <= 0 && (err != -EAGAIN || !ret)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | ret = err; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 229 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | n = write_chan(&line->chan_list, buf, len, |
| 231 | line->driver->write_irq); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 232 | if (n < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | ret = n; |
| 234 | goto out_up; |
| 235 | } |
| 236 | |
| 237 | len -= n; |
| 238 | ret += n; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 239 | if (len > 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | ret += buffer_data(line, buf + n, len); |
| 241 | } |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 242 | out_up: |
| 243 | spin_unlock_irqrestore(&line->lock, flags); |
| 244 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | void line_set_termios(struct tty_struct *tty, struct termios * old) |
| 248 | { |
| 249 | /* nothing */ |
| 250 | } |
| 251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | static struct { |
| 253 | int cmd; |
| 254 | char *level; |
| 255 | char *name; |
| 256 | } tty_ioctls[] = { |
| 257 | /* don't print these, they flood the log ... */ |
| 258 | { TCGETS, NULL, "TCGETS" }, |
| 259 | { TCSETS, NULL, "TCSETS" }, |
| 260 | { TCSETSW, NULL, "TCSETSW" }, |
| 261 | { TCFLSH, NULL, "TCFLSH" }, |
| 262 | { TCSBRK, NULL, "TCSBRK" }, |
| 263 | |
| 264 | /* general tty stuff */ |
| 265 | { TCSETSF, KERN_DEBUG, "TCSETSF" }, |
| 266 | { TCGETA, KERN_DEBUG, "TCGETA" }, |
| 267 | { TIOCMGET, KERN_DEBUG, "TIOCMGET" }, |
| 268 | { TCSBRKP, KERN_DEBUG, "TCSBRKP" }, |
| 269 | { TIOCMSET, KERN_DEBUG, "TIOCMSET" }, |
| 270 | |
| 271 | /* linux-specific ones */ |
| 272 | { TIOCLINUX, KERN_INFO, "TIOCLINUX" }, |
| 273 | { KDGKBMODE, KERN_INFO, "KDGKBMODE" }, |
| 274 | { KDGKBTYPE, KERN_INFO, "KDGKBTYPE" }, |
| 275 | { KDSIGACCEPT, KERN_INFO, "KDSIGACCEPT" }, |
| 276 | }; |
| 277 | |
| 278 | int line_ioctl(struct tty_struct *tty, struct file * file, |
| 279 | unsigned int cmd, unsigned long arg) |
| 280 | { |
| 281 | int ret; |
| 282 | int i; |
| 283 | |
| 284 | ret = 0; |
| 285 | switch(cmd) { |
| 286 | #ifdef TIOCGETP |
| 287 | case TIOCGETP: |
| 288 | case TIOCSETP: |
| 289 | case TIOCSETN: |
| 290 | #endif |
| 291 | #ifdef TIOCGETC |
| 292 | case TIOCGETC: |
| 293 | case TIOCSETC: |
| 294 | #endif |
| 295 | #ifdef TIOCGLTC |
| 296 | case TIOCGLTC: |
| 297 | case TIOCSLTC: |
| 298 | #endif |
| 299 | case TCGETS: |
| 300 | case TCSETSF: |
| 301 | case TCSETSW: |
| 302 | case TCSETS: |
| 303 | case TCGETA: |
| 304 | case TCSETAF: |
| 305 | case TCSETAW: |
| 306 | case TCSETA: |
| 307 | case TCXONC: |
| 308 | case TCFLSH: |
| 309 | case TIOCOUTQ: |
| 310 | case TIOCINQ: |
| 311 | case TIOCGLCKTRMIOS: |
| 312 | case TIOCSLCKTRMIOS: |
| 313 | case TIOCPKT: |
| 314 | case TIOCGSOFTCAR: |
| 315 | case TIOCSSOFTCAR: |
| 316 | return -ENOIOCTLCMD; |
| 317 | #if 0 |
| 318 | case TCwhatever: |
| 319 | /* do something */ |
| 320 | break; |
| 321 | #endif |
| 322 | default: |
| 323 | for (i = 0; i < ARRAY_SIZE(tty_ioctls); i++) |
| 324 | if (cmd == tty_ioctls[i].cmd) |
| 325 | break; |
| 326 | if (i < ARRAY_SIZE(tty_ioctls)) { |
| 327 | if (NULL != tty_ioctls[i].level) |
| 328 | printk("%s%s: %s: ioctl %s called\n", |
| 329 | tty_ioctls[i].level, __FUNCTION__, |
| 330 | tty->name, tty_ioctls[i].name); |
| 331 | } else { |
| 332 | printk(KERN_ERR "%s: %s: unknown ioctl: 0x%x\n", |
| 333 | __FUNCTION__, tty->name, cmd); |
| 334 | } |
| 335 | ret = -ENOIOCTLCMD; |
| 336 | break; |
| 337 | } |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 338 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | static irqreturn_t line_write_interrupt(int irq, void *data, |
| 342 | struct pt_regs *unused) |
| 343 | { |
| 344 | struct tty_struct *tty = data; |
| 345 | struct line *line = tty->driver_data; |
| 346 | int err; |
| 347 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 348 | /* Interrupts are enabled here because we registered the interrupt with |
| 349 | * SA_INTERRUPT (see line_setup_irq).*/ |
| 350 | |
| 351 | spin_lock_irq(&line->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | err = flush_buffer(line); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 353 | if (err == 0) { |
| 354 | return IRQ_NONE; |
| 355 | } else if(err < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | line->head = line->buffer; |
| 357 | line->tail = line->buffer; |
| 358 | } |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 359 | spin_unlock_irq(&line->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
| 361 | if(tty == NULL) |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 362 | return IRQ_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 364 | if (test_bit(TTY_DO_WRITE_WAKEUP, &tty->flags) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | (tty->ldisc.write_wakeup != NULL)) |
| 366 | (tty->ldisc.write_wakeup)(tty); |
| 367 | |
| 368 | /* BLOCKING mode |
| 369 | * In blocking mode, everything sleeps on tty->write_wait. |
| 370 | * Sleeping in the console driver would break non-blocking |
| 371 | * writes. |
| 372 | */ |
| 373 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 374 | if (waitqueue_active(&tty->write_wait)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | wake_up_interruptible(&tty->write_wait); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 376 | return IRQ_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | int line_setup_irq(int fd, int input, int output, struct tty_struct *tty) |
| 380 | { |
| 381 | struct line *line = tty->driver_data; |
| 382 | struct line_driver *driver = line->driver; |
| 383 | int err = 0, flags = SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM; |
| 384 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 385 | if (input) |
| 386 | err = um_request_irq(driver->read_irq, fd, IRQ_READ, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | line_interrupt, flags, |
| 388 | driver->read_irq_name, tty); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 389 | if (err) |
| 390 | return err; |
| 391 | if (output) |
| 392 | err = um_request_irq(driver->write_irq, fd, IRQ_WRITE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | line_write_interrupt, flags, |
| 394 | driver->write_irq_name, tty); |
| 395 | line->have_irq = 1; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 396 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | void line_disable(struct tty_struct *tty, int current_irq) |
| 400 | { |
| 401 | struct line *line = tty->driver_data; |
| 402 | |
| 403 | if(!line->have_irq) |
| 404 | return; |
| 405 | |
| 406 | if(line->driver->read_irq == current_irq) |
| 407 | free_irq_later(line->driver->read_irq, tty); |
| 408 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | free_irq(line->driver->read_irq, tty); |
| 410 | } |
| 411 | |
| 412 | if(line->driver->write_irq == current_irq) |
| 413 | free_irq_later(line->driver->write_irq, tty); |
| 414 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | free_irq(line->driver->write_irq, tty); |
| 416 | } |
| 417 | |
| 418 | line->have_irq = 0; |
| 419 | } |
| 420 | |
| 421 | int line_open(struct line *lines, struct tty_struct *tty, |
| 422 | struct chan_opts *opts) |
| 423 | { |
| 424 | struct line *line; |
| 425 | int err = 0; |
| 426 | |
| 427 | line = &lines[tty->index]; |
| 428 | tty->driver_data = line; |
| 429 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 430 | /* The IRQ which takes this lock is not yet enabled and won't be run |
| 431 | * before the end, so we don't need to use spin_lock_irq.*/ |
| 432 | spin_lock(&line->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | if (tty->count == 1) { |
| 434 | if (!line->valid) { |
| 435 | err = -ENODEV; |
| 436 | goto out; |
| 437 | } |
| 438 | if (list_empty(&line->chan_list)) { |
| 439 | err = parse_chan_pair(line->init_str, &line->chan_list, |
| 440 | line->init_pri, tty->index, opts); |
| 441 | if(err) goto out; |
| 442 | err = open_chan(&line->chan_list); |
| 443 | if(err) goto out; |
| 444 | } |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 445 | /* Here the interrupt is registered.*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | enable_chan(&line->chan_list, tty); |
| 447 | INIT_WORK(&line->task, line_timer_cb, tty); |
| 448 | } |
| 449 | |
| 450 | if(!line->sigio){ |
| 451 | chan_enable_winch(&line->chan_list, tty); |
| 452 | line->sigio = 1; |
| 453 | } |
| 454 | chan_window_size(&line->chan_list, &tty->winsize.ws_row, |
| 455 | &tty->winsize.ws_col); |
| 456 | line->count++; |
| 457 | |
| 458 | out: |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 459 | spin_unlock(&line->lock); |
| 460 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | } |
| 462 | |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 463 | static void unregister_winch(struct tty_struct *tty); |
| 464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | void line_close(struct tty_struct *tty, struct file * filp) |
| 466 | { |
| 467 | struct line *line = tty->driver_data; |
| 468 | |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 469 | /* XXX: I assume this should be called in process context, not with |
| 470 | * interrupts disabled! |
| 471 | */ |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 472 | spin_lock_irq(&line->lock); |
| 473 | |
| 474 | /* We ignore the error anyway! */ |
| 475 | flush_buffer(line); |
| 476 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | line->count--; |
| 478 | if (tty->count == 1) { |
| 479 | line_disable(tty, -1); |
| 480 | tty->driver_data = NULL; |
| 481 | } |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 482 | |
| 483 | if((line->count == 0) && line->sigio){ |
| 484 | unregister_winch(tty); |
| 485 | line->sigio = 0; |
| 486 | } |
| 487 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 488 | spin_unlock_irq(&line->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | void close_lines(struct line *lines, int nlines) |
| 492 | { |
| 493 | int i; |
| 494 | |
| 495 | for(i = 0; i < nlines; i++) |
| 496 | close_chan(&lines[i].chan_list); |
| 497 | } |
| 498 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 499 | /* Common setup code for both startup command line and mconsole initialization. |
| 500 | * @lines contains the the array (of size @num) to modify; |
| 501 | * @init is the setup string; |
| 502 | * @all_allowed is a boolean saying if we can setup the whole @lines |
| 503 | * at once. For instance, it will be usually true for startup init. (where we |
| 504 | * can use con=xterm) and false for mconsole.*/ |
| 505 | |
| 506 | int line_setup(struct line *lines, unsigned int num, char *init, int all_allowed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | { |
| 508 | int i, n; |
| 509 | char *end; |
| 510 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 511 | if(*init == '=') { |
| 512 | /* We said con=/ssl= instead of con#=, so we are configuring all |
| 513 | * consoles at once.*/ |
| 514 | n = -1; |
| 515 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | n = simple_strtoul(init, &end, 0); |
| 517 | if(*end != '='){ |
| 518 | printk(KERN_ERR "line_setup failed to parse \"%s\"\n", |
| 519 | init); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 520 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | } |
| 522 | init = end; |
| 523 | } |
| 524 | init++; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 525 | |
| 526 | if (n >= (signed int) num) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | printk("line_setup - %d out of range ((0 ... %d) allowed)\n", |
| 528 | n, num - 1); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 529 | return 0; |
| 530 | } else if (n >= 0){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | if (lines[n].count > 0) { |
| 532 | printk("line_setup - device %d is open\n", n); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 533 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | } |
| 535 | if (lines[n].init_pri <= INIT_ONE){ |
| 536 | lines[n].init_pri = INIT_ONE; |
| 537 | if (!strcmp(init, "none")) |
| 538 | lines[n].valid = 0; |
| 539 | else { |
| 540 | lines[n].init_str = init; |
| 541 | lines[n].valid = 1; |
| 542 | } |
| 543 | } |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 544 | } else if(!all_allowed){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | printk("line_setup - can't configure all devices from " |
| 546 | "mconsole\n"); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 547 | return 0; |
| 548 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | for(i = 0; i < num; i++){ |
| 550 | if(lines[i].init_pri <= INIT_ALL){ |
| 551 | lines[i].init_pri = INIT_ALL; |
| 552 | if(!strcmp(init, "none")) lines[i].valid = 0; |
| 553 | else { |
| 554 | lines[i].init_str = init; |
| 555 | lines[i].valid = 1; |
| 556 | } |
| 557 | } |
| 558 | } |
| 559 | } |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 560 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 563 | int line_config(struct line *lines, unsigned int num, char *str) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | { |
| 565 | char *new = uml_strdup(str); |
| 566 | |
| 567 | if(new == NULL){ |
| 568 | printk("line_config - uml_strdup failed\n"); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 569 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | } |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 571 | return !line_setup(lines, num, new, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
| 573 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 574 | int line_get_config(char *name, struct line *lines, unsigned int num, char *str, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | int size, char **error_out) |
| 576 | { |
| 577 | struct line *line; |
| 578 | char *end; |
| 579 | int dev, n = 0; |
| 580 | |
| 581 | dev = simple_strtoul(name, &end, 0); |
| 582 | if((*end != '\0') || (end == name)){ |
| 583 | *error_out = "line_get_config failed to parse device number"; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 584 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | if((dev < 0) || (dev >= num)){ |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 588 | *error_out = "device number out of range"; |
| 589 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | line = &lines[dev]; |
| 593 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 594 | spin_lock(&line->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | if(!line->valid) |
| 596 | CONFIG_CHUNK(str, size, n, "none", 1); |
| 597 | else if(line->count == 0) |
| 598 | CONFIG_CHUNK(str, size, n, line->init_str, 1); |
| 599 | else n = chan_config_string(&line->chan_list, str, size, error_out); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 600 | spin_unlock(&line->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 602 | return n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | } |
| 604 | |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 605 | int line_id(char **str, int *start_out, int *end_out) |
| 606 | { |
| 607 | char *end; |
| 608 | int n; |
| 609 | |
| 610 | n = simple_strtoul(*str, &end, 0); |
| 611 | if((*end != '\0') || (end == *str)) |
| 612 | return -1; |
| 613 | |
| 614 | *str = end; |
| 615 | *start_out = n; |
| 616 | *end_out = n; |
| 617 | return n; |
| 618 | } |
| 619 | |
| 620 | int line_remove(struct line *lines, unsigned int num, int n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | { |
| 622 | char config[sizeof("conxxxx=none\0")]; |
| 623 | |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 624 | sprintf(config, "%d=none", n); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 625 | return !line_setup(lines, num, config, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | struct tty_driver *line_register_devfs(struct lines *set, |
| 629 | struct line_driver *line_driver, |
| 630 | struct tty_operations *ops, struct line *lines, |
| 631 | int nlines) |
| 632 | { |
| 633 | int i; |
| 634 | struct tty_driver *driver = alloc_tty_driver(nlines); |
| 635 | |
| 636 | if (!driver) |
| 637 | return NULL; |
| 638 | |
| 639 | driver->driver_name = line_driver->name; |
| 640 | driver->name = line_driver->device_name; |
| 641 | driver->devfs_name = line_driver->devfs_name; |
| 642 | driver->major = line_driver->major; |
| 643 | driver->minor_start = line_driver->minor_start; |
| 644 | driver->type = line_driver->type; |
| 645 | driver->subtype = line_driver->subtype; |
| 646 | driver->flags = TTY_DRIVER_REAL_RAW; |
| 647 | driver->init_termios = tty_std_termios; |
| 648 | tty_set_operations(driver, ops); |
| 649 | |
| 650 | if (tty_register_driver(driver)) { |
| 651 | printk("%s: can't register %s driver\n", |
| 652 | __FUNCTION__,line_driver->name); |
| 653 | put_tty_driver(driver); |
| 654 | return NULL; |
| 655 | } |
| 656 | |
| 657 | for(i = 0; i < nlines; i++){ |
| 658 | if(!lines[i].valid) |
| 659 | tty_unregister_device(driver, i); |
| 660 | } |
| 661 | |
| 662 | mconsole_register_dev(&line_driver->mc); |
| 663 | return driver; |
| 664 | } |
| 665 | |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 666 | static spinlock_t winch_handler_lock; |
| 667 | LIST_HEAD(winch_handlers); |
| 668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | void lines_init(struct line *lines, int nlines) |
| 670 | { |
| 671 | struct line *line; |
| 672 | int i; |
| 673 | |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 674 | spin_lock_init(&winch_handler_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | for(i = 0; i < nlines; i++){ |
| 676 | line = &lines[i]; |
| 677 | INIT_LIST_HEAD(&line->chan_list); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 678 | spin_lock_init(&line->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | if(line->init_str != NULL){ |
| 680 | line->init_str = uml_strdup(line->init_str); |
| 681 | if(line->init_str == NULL) |
| 682 | printk("lines_init - uml_strdup returned " |
| 683 | "NULL\n"); |
| 684 | } |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | struct winch { |
| 689 | struct list_head list; |
| 690 | int fd; |
| 691 | int tty_fd; |
| 692 | int pid; |
| 693 | struct tty_struct *tty; |
| 694 | }; |
| 695 | |
| 696 | irqreturn_t winch_interrupt(int irq, void *data, struct pt_regs *unused) |
| 697 | { |
| 698 | struct winch *winch = data; |
| 699 | struct tty_struct *tty; |
| 700 | struct line *line; |
| 701 | int err; |
| 702 | char c; |
| 703 | |
| 704 | if(winch->fd != -1){ |
| 705 | err = generic_read(winch->fd, &c, NULL); |
| 706 | if(err < 0){ |
| 707 | if(err != -EAGAIN){ |
| 708 | printk("winch_interrupt : read failed, " |
| 709 | "errno = %d\n", -err); |
| 710 | printk("fd %d is losing SIGWINCH support\n", |
| 711 | winch->tty_fd); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 712 | return IRQ_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | } |
| 714 | goto out; |
| 715 | } |
| 716 | } |
| 717 | tty = winch->tty; |
| 718 | if (tty != NULL) { |
| 719 | line = tty->driver_data; |
| 720 | chan_window_size(&line->chan_list, |
| 721 | &tty->winsize.ws_row, |
| 722 | &tty->winsize.ws_col); |
| 723 | kill_pg(tty->pgrp, SIGWINCH, 1); |
| 724 | } |
| 725 | out: |
| 726 | if(winch->fd != -1) |
| 727 | reactivate_fd(winch->fd, WINCH_IRQ); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 728 | return IRQ_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | } |
| 730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty) |
| 732 | { |
| 733 | struct winch *winch; |
| 734 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | winch = kmalloc(sizeof(*winch), GFP_KERNEL); |
| 736 | if (winch == NULL) { |
| 737 | printk("register_winch_irq - kmalloc failed\n"); |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 738 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | } |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 740 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | *winch = ((struct winch) { .list = LIST_HEAD_INIT(winch->list), |
| 742 | .fd = fd, |
| 743 | .tty_fd = tty_fd, |
| 744 | .pid = pid, |
| 745 | .tty = tty }); |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 746 | |
| 747 | spin_lock(&winch_handler_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | list_add(&winch->list, &winch_handlers); |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 749 | spin_unlock(&winch_handler_lock); |
| 750 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 751 | if(um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM, |
| 753 | "winch", winch) < 0) |
| 754 | printk("register_winch_irq - failed to register IRQ\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | } |
| 756 | |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 757 | static void unregister_winch(struct tty_struct *tty) |
| 758 | { |
| 759 | struct list_head *ele; |
| 760 | struct winch *winch, *found = NULL; |
| 761 | |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 762 | spin_lock(&winch_handler_lock); |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 763 | list_for_each(ele, &winch_handlers){ |
| 764 | winch = list_entry(ele, struct winch, list); |
| 765 | if(winch->tty == tty){ |
| 766 | found = winch; |
| 767 | break; |
| 768 | } |
| 769 | } |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 770 | if(found == NULL) |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 771 | goto err; |
| 772 | |
| 773 | list_del(&winch->list); |
| 774 | spin_unlock(&winch_handler_lock); |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 775 | |
| 776 | if(winch->pid != -1) |
| 777 | os_kill_process(winch->pid, 1); |
| 778 | |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 779 | free_irq(WINCH_IRQ, winch); |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 780 | kfree(winch); |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 781 | |
| 782 | return; |
| 783 | err: |
| 784 | spin_unlock(&winch_handler_lock); |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 785 | } |
| 786 | |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 787 | /* XXX: No lock as it's an exitcall... is this valid? Depending on cleanup |
| 788 | * order... are we sure that nothing else is done on the list? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | static void winch_cleanup(void) |
| 790 | { |
| 791 | struct list_head *ele; |
| 792 | struct winch *winch; |
| 793 | |
| 794 | list_for_each(ele, &winch_handlers){ |
| 795 | winch = list_entry(ele, struct winch, list); |
| 796 | if(winch->fd != -1){ |
Paolo 'Blaisorblade' Giarrusso | 605a69a | 2005-07-07 17:56:52 -0700 | [diff] [blame] | 797 | /* Why is this different from the above free_irq(), |
| 798 | * which deactivates SIGIO? This searches the FD |
| 799 | * somewhere else and removes it from the list... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | deactivate_fd(winch->fd, WINCH_IRQ); |
| 801 | os_close_file(winch->fd); |
| 802 | } |
| 803 | if(winch->pid != -1) |
| 804 | os_kill_process(winch->pid, 1); |
| 805 | } |
| 806 | } |
| 807 | __uml_exitcall(winch_cleanup); |
| 808 | |
| 809 | char *add_xterm_umid(char *base) |
| 810 | { |
| 811 | char *umid, *title; |
| 812 | int len; |
| 813 | |
| 814 | umid = get_umid(1); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 815 | if(umid == NULL) |
| 816 | return base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
| 818 | len = strlen(base) + strlen(" ()") + strlen(umid) + 1; |
| 819 | title = kmalloc(len, GFP_KERNEL); |
| 820 | if(title == NULL){ |
| 821 | printk("Failed to allocate buffer for xterm title\n"); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 822 | return base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | snprintf(title, len, "%s (%s)", base, umid); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 826 | return title; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } |