Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/s390/char/fs3270.c |
| 3 | * IBM/3270 Driver - fullscreen driver. |
| 4 | * |
| 5 | * Author(s): |
| 6 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) |
| 7 | * Rewritten for 2.5/2.6 by Martin Schwidefsky <schwidefsky@de.ibm.com> |
| 8 | * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| 9 | */ |
| 10 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/bootmem.h> |
| 12 | #include <linux/console.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/list.h> |
| 16 | #include <linux/types.h> |
Jonathan Corbet | 764a4a8 | 2008-05-15 10:01:17 -0600 | [diff] [blame] | 17 | #include <linux/smp_lock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| 19 | #include <asm/ccwdev.h> |
| 20 | #include <asm/cio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <asm/ebcdic.h> |
| 22 | #include <asm/idals.h> |
| 23 | |
| 24 | #include "raw3270.h" |
| 25 | #include "ctrlchar.h" |
| 26 | |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 27 | static struct raw3270_fn fs3270_fn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | struct fs3270 { |
| 30 | struct raw3270_view view; |
Cedric Le Goater | 782237a | 2006-10-02 02:17:28 -0700 | [diff] [blame] | 31 | struct pid *fs_pid; /* Pid of controlling program. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | int read_command; /* ccw command to use for reads. */ |
| 33 | int write_command; /* ccw command to use for writes. */ |
| 34 | int attention; /* Got attention. */ |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 35 | int active; /* Fullscreen view is active. */ |
| 36 | struct raw3270_request *init; /* single init request. */ |
| 37 | wait_queue_head_t wait; /* Init & attention wait queue. */ |
| 38 | struct idal_buffer *rdbuf; /* full-screen-deactivate buffer */ |
| 39 | size_t rdbuf_size; /* size of data returned by RDBUF */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | }; |
| 41 | |
| 42 | static void |
| 43 | fs3270_wake_up(struct raw3270_request *rq, void *data) |
| 44 | { |
| 45 | wake_up((wait_queue_head_t *) data); |
| 46 | } |
| 47 | |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 48 | static inline int |
| 49 | fs3270_working(struct fs3270 *fp) |
| 50 | { |
| 51 | /* |
| 52 | * The fullscreen view is in working order if the view |
| 53 | * has been activated AND the initial request is finished. |
| 54 | */ |
| 55 | return fp->active && raw3270_request_final(fp->init); |
| 56 | } |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | static int |
| 59 | fs3270_do_io(struct raw3270_view *view, struct raw3270_request *rq) |
| 60 | { |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 61 | struct fs3270 *fp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | int rc; |
| 63 | |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 64 | fp = (struct fs3270 *) view; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | rq->callback = fs3270_wake_up; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 66 | rq->callback_data = &fp->wait; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 68 | do { |
| 69 | if (!fs3270_working(fp)) { |
| 70 | /* Fullscreen view isn't ready yet. */ |
| 71 | rc = wait_event_interruptible(fp->wait, |
| 72 | fs3270_working(fp)); |
| 73 | if (rc != 0) |
| 74 | break; |
| 75 | } |
| 76 | rc = raw3270_start(view, rq); |
| 77 | if (rc == 0) { |
| 78 | /* Started sucessfully. Now wait for completion. */ |
| 79 | wait_event(fp->wait, raw3270_request_final(rq)); |
| 80 | } |
| 81 | } while (rc == -EACCES); |
| 82 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | /* |
| 86 | * Switch to the fullscreen view. |
| 87 | */ |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 88 | static void |
| 89 | fs3270_reset_callback(struct raw3270_request *rq, void *data) |
| 90 | { |
| 91 | struct fs3270 *fp; |
| 92 | |
| 93 | fp = (struct fs3270 *) rq->view; |
| 94 | raw3270_request_reset(rq); |
| 95 | wake_up(&fp->wait); |
| 96 | } |
| 97 | |
| 98 | static void |
| 99 | fs3270_restore_callback(struct raw3270_request *rq, void *data) |
| 100 | { |
| 101 | struct fs3270 *fp; |
| 102 | |
| 103 | fp = (struct fs3270 *) rq->view; |
| 104 | if (rq->rc != 0 || rq->rescnt != 0) { |
| 105 | if (fp->fs_pid) |
Cedric Le Goater | 782237a | 2006-10-02 02:17:28 -0700 | [diff] [blame] | 106 | kill_pid(fp->fs_pid, SIGHUP, 1); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 107 | } |
| 108 | fp->rdbuf_size = 0; |
| 109 | raw3270_request_reset(rq); |
| 110 | wake_up(&fp->wait); |
| 111 | } |
| 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | static int |
| 114 | fs3270_activate(struct raw3270_view *view) |
| 115 | { |
| 116 | struct fs3270 *fp; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 117 | char *cp; |
| 118 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | fp = (struct fs3270 *) view; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 121 | |
| 122 | /* If an old init command is still running just return. */ |
| 123 | if (!raw3270_request_final(fp->init)) |
| 124 | return 0; |
| 125 | |
| 126 | if (fp->rdbuf_size == 0) { |
| 127 | /* No saved buffer. Just clear the screen. */ |
| 128 | raw3270_request_set_cmd(fp->init, TC_EWRITEA); |
| 129 | fp->init->callback = fs3270_reset_callback; |
| 130 | } else { |
| 131 | /* Restore fullscreen buffer saved by fs3270_deactivate. */ |
| 132 | raw3270_request_set_cmd(fp->init, TC_EWRITEA); |
| 133 | raw3270_request_set_idal(fp->init, fp->rdbuf); |
| 134 | fp->init->ccw.count = fp->rdbuf_size; |
| 135 | cp = fp->rdbuf->data[0]; |
| 136 | cp[0] = TW_KR; |
| 137 | cp[1] = TO_SBA; |
| 138 | cp[2] = cp[6]; |
| 139 | cp[3] = cp[7]; |
| 140 | cp[4] = TO_IC; |
| 141 | cp[5] = TO_SBA; |
| 142 | cp[6] = 0x40; |
| 143 | cp[7] = 0x40; |
| 144 | fp->init->rescnt = 0; |
| 145 | fp->init->callback = fs3270_restore_callback; |
| 146 | } |
| 147 | rc = fp->init->rc = raw3270_start_locked(view, fp->init); |
| 148 | if (rc) |
| 149 | fp->init->callback(fp->init, NULL); |
| 150 | else |
| 151 | fp->active = 1; |
| 152 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | /* |
| 156 | * Shutdown fullscreen view. |
| 157 | */ |
| 158 | static void |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 159 | fs3270_save_callback(struct raw3270_request *rq, void *data) |
| 160 | { |
| 161 | struct fs3270 *fp; |
| 162 | |
| 163 | fp = (struct fs3270 *) rq->view; |
| 164 | |
| 165 | /* Correct idal buffer element 0 address. */ |
| 166 | fp->rdbuf->data[0] -= 5; |
| 167 | fp->rdbuf->size += 5; |
| 168 | |
| 169 | /* |
| 170 | * If the rdbuf command failed or the idal buffer is |
| 171 | * to small for the amount of data returned by the |
| 172 | * rdbuf command, then we have no choice but to send |
| 173 | * a SIGHUP to the application. |
| 174 | */ |
| 175 | if (rq->rc != 0 || rq->rescnt == 0) { |
| 176 | if (fp->fs_pid) |
Cedric Le Goater | 782237a | 2006-10-02 02:17:28 -0700 | [diff] [blame] | 177 | kill_pid(fp->fs_pid, SIGHUP, 1); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 178 | fp->rdbuf_size = 0; |
| 179 | } else |
| 180 | fp->rdbuf_size = fp->rdbuf->size - rq->rescnt; |
| 181 | raw3270_request_reset(rq); |
| 182 | wake_up(&fp->wait); |
| 183 | } |
| 184 | |
| 185 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | fs3270_deactivate(struct raw3270_view *view) |
| 187 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | struct fs3270 *fp; |
| 189 | |
| 190 | fp = (struct fs3270 *) view; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 191 | fp->active = 0; |
| 192 | |
| 193 | /* If an old init command is still running just return. */ |
| 194 | if (!raw3270_request_final(fp->init)) |
| 195 | return; |
| 196 | |
| 197 | /* Prepare read-buffer request. */ |
| 198 | raw3270_request_set_cmd(fp->init, TC_RDBUF); |
| 199 | /* |
| 200 | * Hackish: skip first 5 bytes of the idal buffer to make |
| 201 | * room for the TW_KR/TO_SBA/<address>/<address>/TO_IC sequence |
| 202 | * in the activation command. |
| 203 | */ |
| 204 | fp->rdbuf->data[0] += 5; |
| 205 | fp->rdbuf->size -= 5; |
| 206 | raw3270_request_set_idal(fp->init, fp->rdbuf); |
| 207 | fp->init->rescnt = 0; |
| 208 | fp->init->callback = fs3270_save_callback; |
| 209 | |
| 210 | /* Start I/O to read in the 3270 buffer. */ |
| 211 | fp->init->rc = raw3270_start_locked(view, fp->init); |
| 212 | if (fp->init->rc) |
| 213 | fp->init->callback(fp->init, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | static int |
| 217 | fs3270_irq(struct fs3270 *fp, struct raw3270_request *rq, struct irb *irb) |
| 218 | { |
| 219 | /* Handle ATTN. Set indication and wake waiters for attention. */ |
Peter Oberparleiter | 23d805b | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 220 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | fp->attention = 1; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 222 | wake_up(&fp->wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | if (rq) { |
Peter Oberparleiter | 23d805b | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 226 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | rq->rc = -EIO; |
| 228 | else |
| 229 | /* Normal end. Copy residual count. */ |
Peter Oberparleiter | 23d805b | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 230 | rq->rescnt = irb->scsw.cmd.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | } |
| 232 | return RAW3270_IO_DONE; |
| 233 | } |
| 234 | |
| 235 | /* |
| 236 | * Process reads from fullscreen 3270. |
| 237 | */ |
| 238 | static ssize_t |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 239 | fs3270_read(struct file *filp, char __user *data, size_t count, loff_t *off) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
| 241 | struct fs3270 *fp; |
| 242 | struct raw3270_request *rq; |
| 243 | struct idal_buffer *ib; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 244 | ssize_t rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | if (count == 0 || count > 65535) |
| 247 | return -EINVAL; |
| 248 | fp = filp->private_data; |
| 249 | if (!fp) |
| 250 | return -ENODEV; |
| 251 | ib = idal_buffer_alloc(count, 0); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 252 | if (IS_ERR(ib)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | return -ENOMEM; |
| 254 | rq = raw3270_request_alloc(0); |
| 255 | if (!IS_ERR(rq)) { |
| 256 | if (fp->read_command == 0 && fp->write_command != 0) |
| 257 | fp->read_command = 6; |
| 258 | raw3270_request_set_cmd(rq, fp->read_command ? : 2); |
| 259 | raw3270_request_set_idal(rq, ib); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 260 | rc = wait_event_interruptible(fp->wait, fp->attention); |
| 261 | fp->attention = 0; |
| 262 | if (rc == 0) { |
| 263 | rc = fs3270_do_io(&fp->view, rq); |
| 264 | if (rc == 0) { |
| 265 | count -= rq->rescnt; |
| 266 | if (idal_buffer_to_user(ib, data, count) != 0) |
| 267 | rc = -EFAULT; |
| 268 | else |
| 269 | rc = count; |
| 270 | |
| 271 | } |
| 272 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | raw3270_request_free(rq); |
| 274 | } else |
| 275 | rc = PTR_ERR(rq); |
| 276 | idal_buffer_free(ib); |
| 277 | return rc; |
| 278 | } |
| 279 | |
| 280 | /* |
| 281 | * Process writes to fullscreen 3270. |
| 282 | */ |
| 283 | static ssize_t |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 284 | fs3270_write(struct file *filp, const char __user *data, size_t count, loff_t *off) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | { |
| 286 | struct fs3270 *fp; |
| 287 | struct raw3270_request *rq; |
| 288 | struct idal_buffer *ib; |
| 289 | int write_command; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 290 | ssize_t rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
| 292 | fp = filp->private_data; |
| 293 | if (!fp) |
| 294 | return -ENODEV; |
| 295 | ib = idal_buffer_alloc(count, 0); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 296 | if (IS_ERR(ib)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | return -ENOMEM; |
| 298 | rq = raw3270_request_alloc(0); |
| 299 | if (!IS_ERR(rq)) { |
| 300 | if (idal_buffer_from_user(ib, data, count) == 0) { |
| 301 | write_command = fp->write_command ? : 1; |
| 302 | if (write_command == 5) |
| 303 | write_command = 13; |
| 304 | raw3270_request_set_cmd(rq, write_command); |
| 305 | raw3270_request_set_idal(rq, ib); |
| 306 | rc = fs3270_do_io(&fp->view, rq); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 307 | if (rc == 0) |
| 308 | rc = count - rq->rescnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | } else |
| 310 | rc = -EFAULT; |
| 311 | raw3270_request_free(rq); |
| 312 | } else |
| 313 | rc = PTR_ERR(rq); |
| 314 | idal_buffer_free(ib); |
| 315 | return rc; |
| 316 | } |
| 317 | |
| 318 | /* |
| 319 | * process ioctl commands for the tube driver |
| 320 | */ |
Christoph Hellwig | 0f75e00 | 2006-01-09 20:52:04 -0800 | [diff] [blame] | 321 | static long |
| 322 | fs3270_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | { |
| 324 | struct fs3270 *fp; |
| 325 | struct raw3270_iocb iocb; |
| 326 | int rc; |
| 327 | |
| 328 | fp = filp->private_data; |
| 329 | if (!fp) |
| 330 | return -ENODEV; |
| 331 | rc = 0; |
Christoph Hellwig | 0f75e00 | 2006-01-09 20:52:04 -0800 | [diff] [blame] | 332 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | switch (cmd) { |
| 334 | case TUBICMD: |
| 335 | fp->read_command = arg; |
| 336 | break; |
| 337 | case TUBOCMD: |
| 338 | fp->write_command = arg; |
| 339 | break; |
| 340 | case TUBGETI: |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 341 | rc = put_user(fp->read_command, (char __user *) arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | break; |
| 343 | case TUBGETO: |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 344 | rc = put_user(fp->write_command,(char __user *) arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | break; |
| 346 | case TUBGETMOD: |
| 347 | iocb.model = fp->view.model; |
| 348 | iocb.line_cnt = fp->view.rows; |
| 349 | iocb.col_cnt = fp->view.cols; |
| 350 | iocb.pf_cnt = 24; |
| 351 | iocb.re_cnt = 20; |
| 352 | iocb.map = 0; |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 353 | if (copy_to_user((char __user *) arg, &iocb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | sizeof(struct raw3270_iocb))) |
| 355 | rc = -EFAULT; |
| 356 | break; |
| 357 | } |
Christoph Hellwig | 0f75e00 | 2006-01-09 20:52:04 -0800 | [diff] [blame] | 358 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | return rc; |
| 360 | } |
| 361 | |
| 362 | /* |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 363 | * Allocate fs3270 structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | */ |
| 365 | static struct fs3270 * |
| 366 | fs3270_alloc_view(void) |
| 367 | { |
| 368 | struct fs3270 *fp; |
| 369 | |
Eric Sesterhenn | 88abaab | 2006-03-24 03:15:31 -0800 | [diff] [blame] | 370 | fp = kzalloc(sizeof(struct fs3270),GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | if (!fp) |
| 372 | return ERR_PTR(-ENOMEM); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 373 | fp->init = raw3270_request_alloc(0); |
| 374 | if (IS_ERR(fp->init)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | kfree(fp); |
| 376 | return ERR_PTR(-ENOMEM); |
| 377 | } |
| 378 | return fp; |
| 379 | } |
| 380 | |
| 381 | /* |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 382 | * Free fs3270 structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | */ |
| 384 | static void |
| 385 | fs3270_free_view(struct raw3270_view *view) |
| 386 | { |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 387 | struct fs3270 *fp; |
| 388 | |
| 389 | fp = (struct fs3270 *) view; |
| 390 | if (fp->rdbuf) |
| 391 | idal_buffer_free(fp->rdbuf); |
| 392 | raw3270_request_free(((struct fs3270 *) view)->init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | kfree(view); |
| 394 | } |
| 395 | |
| 396 | /* |
| 397 | * Unlink fs3270 data structure from filp. |
| 398 | */ |
| 399 | static void |
| 400 | fs3270_release(struct raw3270_view *view) |
| 401 | { |
| 402 | } |
| 403 | |
| 404 | /* View to a 3270 device. Can be console, tty or fullscreen. */ |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 405 | static struct raw3270_fn fs3270_fn = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | .activate = fs3270_activate, |
| 407 | .deactivate = fs3270_deactivate, |
| 408 | .intv = (void *) fs3270_irq, |
| 409 | .release = fs3270_release, |
| 410 | .free = fs3270_free_view |
| 411 | }; |
| 412 | |
| 413 | /* |
| 414 | * This routine is called whenever a 3270 fullscreen device is opened. |
| 415 | */ |
| 416 | static int |
| 417 | fs3270_open(struct inode *inode, struct file *filp) |
| 418 | { |
| 419 | struct fs3270 *fp; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 420 | struct idal_buffer *ib; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | int minor, rc; |
| 422 | |
Josef Sipek | 49522c9 | 2006-12-08 02:37:34 -0800 | [diff] [blame] | 423 | if (imajor(filp->f_path.dentry->d_inode) != IBM_FS3270_MAJOR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | return -ENODEV; |
Jonathan Corbet | 764a4a8 | 2008-05-15 10:01:17 -0600 | [diff] [blame] | 425 | lock_kernel(); |
Josef Sipek | 49522c9 | 2006-12-08 02:37:34 -0800 | [diff] [blame] | 426 | minor = iminor(filp->f_path.dentry->d_inode); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 427 | /* Check for minor 0 multiplexer. */ |
| 428 | if (minor == 0) { |
Peter Zijlstra | 24ec839 | 2006-12-08 02:36:04 -0800 | [diff] [blame] | 429 | struct tty_struct *tty; |
| 430 | mutex_lock(&tty_mutex); |
| 431 | tty = get_current_tty(); |
| 432 | if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) { |
Alan Cox | 452a00d | 2008-10-13 10:39:13 +0100 | [diff] [blame^] | 433 | tty_kref_put(tty); |
Jonathan Corbet | 764a4a8 | 2008-05-15 10:01:17 -0600 | [diff] [blame] | 434 | rc = -ENODEV; |
| 435 | goto out; |
Peter Zijlstra | 24ec839 | 2006-12-08 02:36:04 -0800 | [diff] [blame] | 436 | } |
| 437 | minor = tty->index + RAW3270_FIRSTMINOR; |
Alan Cox | 452a00d | 2008-10-13 10:39:13 +0100 | [diff] [blame^] | 438 | tty_kref_put(tty); |
Peter Zijlstra | 24ec839 | 2006-12-08 02:36:04 -0800 | [diff] [blame] | 439 | mutex_unlock(&tty_mutex); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 440 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | /* Check if some other program is already using fullscreen mode. */ |
| 442 | fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor); |
| 443 | if (!IS_ERR(fp)) { |
| 444 | raw3270_put_view(&fp->view); |
Jonathan Corbet | 764a4a8 | 2008-05-15 10:01:17 -0600 | [diff] [blame] | 445 | rc = -EBUSY; |
| 446 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | } |
| 448 | /* Allocate fullscreen view structure. */ |
| 449 | fp = fs3270_alloc_view(); |
Jonathan Corbet | 764a4a8 | 2008-05-15 10:01:17 -0600 | [diff] [blame] | 450 | if (IS_ERR(fp)) { |
| 451 | rc = PTR_ERR(fp); |
| 452 | goto out; |
| 453 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 455 | init_waitqueue_head(&fp->wait); |
Cedric Le Goater | 782237a | 2006-10-02 02:17:28 -0700 | [diff] [blame] | 456 | fp->fs_pid = get_pid(task_pid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | rc = raw3270_add_view(&fp->view, &fs3270_fn, minor); |
| 458 | if (rc) { |
| 459 | fs3270_free_view(&fp->view); |
Jonathan Corbet | 764a4a8 | 2008-05-15 10:01:17 -0600 | [diff] [blame] | 460 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | } |
| 462 | |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 463 | /* Allocate idal-buffer. */ |
| 464 | ib = idal_buffer_alloc(2*fp->view.rows*fp->view.cols + 5, 0); |
| 465 | if (IS_ERR(ib)) { |
| 466 | raw3270_put_view(&fp->view); |
| 467 | raw3270_del_view(&fp->view); |
Jonathan Corbet | 764a4a8 | 2008-05-15 10:01:17 -0600 | [diff] [blame] | 468 | rc = PTR_ERR(fp); |
| 469 | goto out; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 470 | } |
| 471 | fp->rdbuf = ib; |
| 472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | rc = raw3270_activate_view(&fp->view); |
| 474 | if (rc) { |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 475 | raw3270_put_view(&fp->view); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | raw3270_del_view(&fp->view); |
Jonathan Corbet | 764a4a8 | 2008-05-15 10:01:17 -0600 | [diff] [blame] | 477 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | } |
| 479 | filp->private_data = fp; |
Jonathan Corbet | 764a4a8 | 2008-05-15 10:01:17 -0600 | [diff] [blame] | 480 | out: |
| 481 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | /* |
| 486 | * This routine is called when the 3270 tty is closed. We wait |
| 487 | * for the remaining request to be completed. Then we clean up. |
| 488 | */ |
| 489 | static int |
| 490 | fs3270_close(struct inode *inode, struct file *filp) |
| 491 | { |
| 492 | struct fs3270 *fp; |
| 493 | |
| 494 | fp = filp->private_data; |
Heiko Carstens | d2c993d | 2006-07-12 16:41:55 +0200 | [diff] [blame] | 495 | filp->private_data = NULL; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 496 | if (fp) { |
Cedric Le Goater | 782237a | 2006-10-02 02:17:28 -0700 | [diff] [blame] | 497 | put_pid(fp->fs_pid); |
| 498 | fp->fs_pid = NULL; |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 499 | raw3270_reset(&fp->view); |
| 500 | raw3270_put_view(&fp->view); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | raw3270_del_view(&fp->view); |
Richard Hitt | ed3cb6f | 2005-10-30 15:00:10 -0800 | [diff] [blame] | 502 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | return 0; |
| 504 | } |
| 505 | |
Arjan van de Ven | d54b1fd | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 506 | static const struct file_operations fs3270_fops = { |
Christoph Hellwig | 0f75e00 | 2006-01-09 20:52:04 -0800 | [diff] [blame] | 507 | .owner = THIS_MODULE, /* owner */ |
| 508 | .read = fs3270_read, /* read */ |
| 509 | .write = fs3270_write, /* write */ |
| 510 | .unlocked_ioctl = fs3270_ioctl, /* ioctl */ |
| 511 | .compat_ioctl = fs3270_ioctl, /* ioctl */ |
| 512 | .open = fs3270_open, /* open */ |
| 513 | .release = fs3270_close, /* release */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | }; |
| 515 | |
| 516 | /* |
| 517 | * 3270 fullscreen driver initialization. |
| 518 | */ |
| 519 | static int __init |
| 520 | fs3270_init(void) |
| 521 | { |
| 522 | int rc; |
| 523 | |
| 524 | rc = register_chrdev(IBM_FS3270_MAJOR, "fs3270", &fs3270_fops); |
Martin Schwidefsky | a26182e | 2008-07-14 09:59:25 +0200 | [diff] [blame] | 525 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | static void __exit |
| 531 | fs3270_exit(void) |
| 532 | { |
| 533 | unregister_chrdev(IBM_FS3270_MAJOR, "fs3270"); |
| 534 | } |
| 535 | |
| 536 | MODULE_LICENSE("GPL"); |
| 537 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_FS3270_MAJOR); |
| 538 | |
| 539 | module_init(fs3270_init); |
| 540 | module_exit(fs3270_exit); |