From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/s390/char/fs3270.c | 373 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 373 insertions(+) create mode 100644 drivers/s390/char/fs3270.c (limited to 'drivers/s390/char/fs3270.c') diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c new file mode 100644 index 000000000000..60afcdcf91c2 --- /dev/null +++ b/drivers/s390/char/fs3270.c @@ -0,0 +1,373 @@ +/* + * drivers/s390/char/fs3270.c + * IBM/3270 Driver - fullscreen driver. + * + * Author(s): + * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) + * Rewritten for 2.5/2.6 by Martin Schwidefsky + * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include "raw3270.h" +#include "ctrlchar.h" + +struct raw3270_fn fs3270_fn; + +struct fs3270 { + struct raw3270_view view; + pid_t fs_pid; /* Pid of controlling program. */ + int read_command; /* ccw command to use for reads. */ + int write_command; /* ccw command to use for writes. */ + int attention; /* Got attention. */ + struct raw3270_request *clear; /* single clear request. */ + wait_queue_head_t attn_wait; /* Attention wait queue. */ +}; + +static void +fs3270_wake_up(struct raw3270_request *rq, void *data) +{ + wake_up((wait_queue_head_t *) data); +} + +static int +fs3270_do_io(struct raw3270_view *view, struct raw3270_request *rq) +{ + wait_queue_head_t wq; + int rc; + + init_waitqueue_head(&wq); + rq->callback = fs3270_wake_up; + rq->callback_data = &wq; + rc = raw3270_start(view, rq); + if (rc) + return rc; + /* Started sucessfully. Now wait for completion. */ + wait_event(wq, raw3270_request_final(rq)); + return rq->rc; +} + +static void +fs3270_reset_callback(struct raw3270_request *rq, void *data) +{ + raw3270_request_reset(rq); +} + +/* + * Switch to the fullscreen view. + */ +static int +fs3270_activate(struct raw3270_view *view) +{ + struct fs3270 *fp; + + fp = (struct fs3270 *) view; + raw3270_request_set_cmd(fp->clear, TC_EWRITEA); + fp->clear->callback = fs3270_reset_callback; + return raw3270_start(view, fp->clear); +} + +/* + * Shutdown fullscreen view. + */ +static void +fs3270_deactivate(struct raw3270_view *view) +{ + // FIXME: is this a good idea? The user program using fullscreen 3270 + // will die just because a console message appeared. On the other + // hand the fullscreen device is unoperational now. + struct fs3270 *fp; + + fp = (struct fs3270 *) view; + if (fp->fs_pid != 0) + kill_proc(fp->fs_pid, SIGHUP, 1); + fp->fs_pid = 0; +} + +static int +fs3270_irq(struct fs3270 *fp, struct raw3270_request *rq, struct irb *irb) +{ + /* Handle ATTN. Set indication and wake waiters for attention. */ + if (irb->scsw.dstat & DEV_STAT_ATTENTION) { + fp->attention = 1; + wake_up(&fp->attn_wait); + } + + if (rq) { + if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) + rq->rc = -EIO; + else + /* Normal end. Copy residual count. */ + rq->rescnt = irb->scsw.count; + } + return RAW3270_IO_DONE; +} + +/* + * Process reads from fullscreen 3270. + */ +static ssize_t +fs3270_read(struct file *filp, char *data, size_t count, loff_t *off) +{ + struct fs3270 *fp; + struct raw3270_request *rq; + struct idal_buffer *ib; + int rc; + + if (count == 0 || count > 65535) + return -EINVAL; + fp = filp->private_data; + if (!fp) + return -ENODEV; + ib = idal_buffer_alloc(count, 0); + if (!ib) + return -ENOMEM; + rq = raw3270_request_alloc(0); + if (!IS_ERR(rq)) { + if (fp->read_command == 0 && fp->write_command != 0) + fp->read_command = 6; + raw3270_request_set_cmd(rq, fp->read_command ? : 2); + raw3270_request_set_idal(rq, ib); + wait_event(fp->attn_wait, fp->attention); + rc = fs3270_do_io(&fp->view, rq); + if (rc == 0 && idal_buffer_to_user(ib, data, count)) + rc = -EFAULT; + raw3270_request_free(rq); + } else + rc = PTR_ERR(rq); + idal_buffer_free(ib); + return rc; +} + +/* + * Process writes to fullscreen 3270. + */ +static ssize_t +fs3270_write(struct file *filp, const char *data, size_t count, loff_t *off) +{ + struct fs3270 *fp; + struct raw3270_request *rq; + struct idal_buffer *ib; + int write_command; + int rc; + + fp = filp->private_data; + if (!fp) + return -ENODEV; + ib = idal_buffer_alloc(count, 0); + if (!ib) + return -ENOMEM; + rq = raw3270_request_alloc(0); + if (!IS_ERR(rq)) { + if (idal_buffer_from_user(ib, data, count) == 0) { + write_command = fp->write_command ? : 1; + if (write_command == 5) + write_command = 13; + raw3270_request_set_cmd(rq, write_command); + raw3270_request_set_idal(rq, ib); + rc = fs3270_do_io(&fp->view, rq); + } else + rc = -EFAULT; + raw3270_request_free(rq); + } else + rc = PTR_ERR(rq); + idal_buffer_free(ib); + return rc; +} + +/* + * process ioctl commands for the tube driver + */ +static int +fs3270_ioctl(struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg) +{ + struct fs3270 *fp; + struct raw3270_iocb iocb; + int rc; + + fp = filp->private_data; + if (!fp) + return -ENODEV; + rc = 0; + switch (cmd) { + case TUBICMD: + fp->read_command = arg; + break; + case TUBOCMD: + fp->write_command = arg; + break; + case TUBGETI: + rc = put_user(fp->read_command, (char *) arg); + break; + case TUBGETO: + rc = put_user(fp->write_command,(char *) arg); + break; + case TUBGETMOD: + iocb.model = fp->view.model; + iocb.line_cnt = fp->view.rows; + iocb.col_cnt = fp->view.cols; + iocb.pf_cnt = 24; + iocb.re_cnt = 20; + iocb.map = 0; + if (copy_to_user((char *) arg, &iocb, + sizeof(struct raw3270_iocb))) + rc = -EFAULT; + break; + } + return rc; +} + +/* + * Allocate tty3270 structure. + */ +static struct fs3270 * +fs3270_alloc_view(void) +{ + struct fs3270 *fp; + + fp = (struct fs3270 *) kmalloc(sizeof(struct fs3270),GFP_KERNEL); + if (!fp) + return ERR_PTR(-ENOMEM); + memset(fp, 0, sizeof(struct fs3270)); + fp->clear = raw3270_request_alloc(0); + if (!IS_ERR(fp->clear)) { + kfree(fp); + return ERR_PTR(-ENOMEM); + } + return fp; +} + +/* + * Free tty3270 structure. + */ +static void +fs3270_free_view(struct raw3270_view *view) +{ + raw3270_request_free(((struct fs3270 *) view)->clear); + kfree(view); +} + +/* + * Unlink fs3270 data structure from filp. + */ +static void +fs3270_release(struct raw3270_view *view) +{ +} + +/* View to a 3270 device. Can be console, tty or fullscreen. */ +struct raw3270_fn fs3270_fn = { + .activate = fs3270_activate, + .deactivate = fs3270_deactivate, + .intv = (void *) fs3270_irq, + .release = fs3270_release, + .free = fs3270_free_view +}; + +/* + * This routine is called whenever a 3270 fullscreen device is opened. + */ +static int +fs3270_open(struct inode *inode, struct file *filp) +{ + struct fs3270 *fp; + int minor, rc; + + if (imajor(filp->f_dentry->d_inode) != IBM_FS3270_MAJOR) + return -ENODEV; + minor = iminor(filp->f_dentry->d_inode); + /* Check if some other program is already using fullscreen mode. */ + fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor); + if (!IS_ERR(fp)) { + raw3270_put_view(&fp->view); + return -EBUSY; + } + /* Allocate fullscreen view structure. */ + fp = fs3270_alloc_view(); + if (IS_ERR(fp)) + return PTR_ERR(fp); + + init_waitqueue_head(&fp->attn_wait); + fp->fs_pid = current->pid; + rc = raw3270_add_view(&fp->view, &fs3270_fn, minor); + if (rc) { + fs3270_free_view(&fp->view); + return rc; + } + + rc = raw3270_activate_view(&fp->view); + if (rc) { + raw3270_del_view(&fp->view); + return rc; + } + filp->private_data = fp; + return 0; +} + +/* + * This routine is called when the 3270 tty is closed. We wait + * for the remaining request to be completed. Then we clean up. + */ +static int +fs3270_close(struct inode *inode, struct file *filp) +{ + struct fs3270 *fp; + + fp = filp->private_data; + filp->private_data = 0; + if (fp) + raw3270_del_view(&fp->view); + return 0; +} + +static struct file_operations fs3270_fops = { + .owner = THIS_MODULE, /* owner */ + .read = fs3270_read, /* read */ + .write = fs3270_write, /* write */ + .ioctl = fs3270_ioctl, /* ioctl */ + .open = fs3270_open, /* open */ + .release = fs3270_close, /* release */ +}; + +/* + * 3270 fullscreen driver initialization. + */ +static int __init +fs3270_init(void) +{ + int rc; + + rc = register_chrdev(IBM_FS3270_MAJOR, "fs3270", &fs3270_fops); + if (rc) { + printk(KERN_ERR "fs3270 can't get major number %d: errno %d\n", + IBM_FS3270_MAJOR, rc); + return rc; + } + return 0; +} + +static void __exit +fs3270_exit(void) +{ + unregister_chrdev(IBM_FS3270_MAJOR, "fs3270"); +} + +MODULE_LICENSE("GPL"); +MODULE_ALIAS_CHARDEV_MAJOR(IBM_FS3270_MAJOR); + +module_init(fs3270_init); +module_exit(fs3270_exit); -- cgit v1.2.2