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!
diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
new file mode 100644
index 0000000..60afcdc
--- /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 <schwidefsky@de.ibm.com>
+ * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ */
+
+#include <linux/config.h>
+#include <linux/bootmem.h>
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/types.h>
+
+#include <asm/ccwdev.h>
+#include <asm/cio.h>
+#include <asm/cpcmd.h>
+#include <asm/ebcdic.h>
+#include <asm/idals.h>
+
+#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);