+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * IBM/3270 Driver - console view.
- *
- * Author(s):
- * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
- * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
- * Copyright IBM Corp. 2003, 2009
- */
-
-#include <linux/module.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/list.h>
-#include <linux/panic_notifier.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/reboot.h>
-
-#include <asm/ccwdev.h>
-#include <asm/cio.h>
-#include <asm/cpcmd.h>
-#include <asm/ebcdic.h>
-
-#include "raw3270.h"
-#include "tty3270.h"
-#include "ctrlchar.h"
-
-#define CON3270_OUTPUT_BUFFER_SIZE 1024
-#define CON3270_STRING_PAGES 4
-
-static struct raw3270_fn con3270_fn;
-
-static bool auto_update = true;
-module_param(auto_update, bool, 0);
-
-/*
- * Main 3270 console view data structure.
- */
-struct con3270 {
- struct raw3270_view view;
- struct list_head freemem; /* list of free memory for strings. */
-
- /* Output stuff. */
- struct list_head lines; /* list of lines. */
- struct list_head update; /* list of lines to update. */
- int line_nr; /* line number for next update. */
- int nr_lines; /* # lines in list. */
- int nr_up; /* # lines up in history. */
- unsigned long update_flags; /* Update indication bits. */
- struct string *cline; /* current output line. */
- struct string *status; /* last line of display. */
- struct raw3270_request *write; /* single write request. */
- struct timer_list timer;
-
- /* Input stuff. */
- struct string *input; /* input string for read request. */
- struct raw3270_request *read; /* single read request. */
- struct raw3270_request *kreset; /* single keyboard reset request. */
- struct tasklet_struct readlet; /* tasklet to issue read request. */
-};
-
-static struct con3270 *condev;
-
-/* con3270->update_flags. See con3270_update for details. */
-#define CON_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */
-#define CON_UPDATE_LIST 2 /* Update lines in tty3270->update. */
-#define CON_UPDATE_STATUS 4 /* Update status line. */
-#define CON_UPDATE_ALL 8 /* Recreate screen. */
-
-static void con3270_update(struct timer_list *);
-
-/*
- * Setup timeout for a device. On timeout trigger an update.
- */
-static void con3270_set_timer(struct con3270 *cp, int expires)
-{
- if (expires == 0)
- del_timer(&cp->timer);
- else
- mod_timer(&cp->timer, jiffies + expires);
-}
-
-/*
- * The status line is the last line of the screen. It shows the string
- * "console view" in the lower left corner and "Running"/"More..."/"Holding"
- * in the lower right corner of the screen.
- */
-static void
-con3270_update_status(struct con3270 *cp)
-{
- char *str;
-
- str = (cp->nr_up != 0) ? "History" : "Running";
- memcpy(cp->status->string + 24, str, 7);
- codepage_convert(cp->view.ascebc, cp->status->string + 24, 7);
- cp->update_flags |= CON_UPDATE_STATUS;
-}
-
-static void
-con3270_create_status(struct con3270 *cp)
-{
- static const unsigned char blueprint[] =
- { TO_SBA, 0, 0, TO_SF,TF_LOG,TO_SA,TAT_COLOR, TAC_GREEN,
- 'c','o','n','s','o','l','e',' ','v','i','e','w',
- TO_RA,0,0,0,'R','u','n','n','i','n','g',TO_SF,TF_LOG };
-
- cp->status = alloc_string(&cp->freemem, sizeof(blueprint));
- /* Copy blueprint to status line */
- memcpy(cp->status->string, blueprint, sizeof(blueprint));
- /* Set TO_RA addresses. */
- raw3270_buffer_address(cp->view.dev, cp->status->string + 1,
- cp->view.cols * (cp->view.rows - 1));
- raw3270_buffer_address(cp->view.dev, cp->status->string + 21,
- cp->view.cols * cp->view.rows - 8);
- /* Convert strings to ebcdic. */
- codepage_convert(cp->view.ascebc, cp->status->string + 8, 12);
- codepage_convert(cp->view.ascebc, cp->status->string + 24, 7);
-}
-
-/*
- * Set output offsets to 3270 datastream fragment of a console string.
- */
-static void
-con3270_update_string(struct con3270 *cp, struct string *s, int nr)
-{
- if (s->len < 4) {
- /* This indicates a bug, but printing a warning would
- * cause a deadlock. */
- return;
- }
- if (s->string[s->len - 4] != TO_RA)
- return;
- raw3270_buffer_address(cp->view.dev, s->string + s->len - 3,
- cp->view.cols * (nr + 1));
-}
-
-/*
- * Rebuild update list to print all lines.
- */
-static void
-con3270_rebuild_update(struct con3270 *cp)
-{
- struct string *s, *n;
- int nr;
-
- /*
- * Throw away update list and create a new one,
- * containing all lines that will fit on the screen.
- */
- list_for_each_entry_safe(s, n, &cp->update, update)
- list_del_init(&s->update);
- nr = cp->view.rows - 2 + cp->nr_up;
- list_for_each_entry_reverse(s, &cp->lines, list) {
- if (nr < cp->view.rows - 1)
- list_add(&s->update, &cp->update);
- if (--nr < 0)
- break;
- }
- cp->line_nr = 0;
- cp->update_flags |= CON_UPDATE_LIST;
-}
-
-/*
- * Alloc string for size bytes. Free strings from history if necessary.
- */
-static struct string *
-con3270_alloc_string(struct con3270 *cp, size_t size)
-{
- struct string *s, *n;
-
- s = alloc_string(&cp->freemem, size);
- if (s)
- return s;
- list_for_each_entry_safe(s, n, &cp->lines, list) {
- list_del(&s->list);
- if (!list_empty(&s->update))
- list_del(&s->update);
- cp->nr_lines--;
- if (free_string(&cp->freemem, s) >= size)
- break;
- }
- s = alloc_string(&cp->freemem, size);
- BUG_ON(!s);
- if (cp->nr_up != 0 && cp->nr_up + cp->view.rows > cp->nr_lines) {
- cp->nr_up = cp->nr_lines - cp->view.rows + 1;
- con3270_rebuild_update(cp);
- con3270_update_status(cp);
- }
- return s;
-}
-
-/*
- * Write completion callback.
- */
-static void
-con3270_write_callback(struct raw3270_request *rq, void *data)
-{
- raw3270_request_reset(rq);
- xchg(&((struct con3270 *) rq->view)->write, rq);
-}
-
-/*
- * Update console display.
- */
-static void
-con3270_update(struct timer_list *t)
-{
- struct con3270 *cp = from_timer(cp, t, timer);
- struct raw3270_request *wrq;
- char wcc, prolog[6];
- unsigned long flags;
- unsigned long updated;
- struct string *s, *n;
- int rc;
-
- if (!auto_update && !raw3270_view_active(&cp->view))
- return;
- if (cp->view.dev)
- raw3270_activate_view(&cp->view);
-
- wrq = xchg(&cp->write, 0);
- if (!wrq) {
- con3270_set_timer(cp, 1);
- return;
- }
-
- spin_lock_irqsave(&cp->view.lock, flags);
- updated = 0;
- if (cp->update_flags & CON_UPDATE_ALL) {
- con3270_rebuild_update(cp);
- con3270_update_status(cp);
- cp->update_flags = CON_UPDATE_ERASE | CON_UPDATE_LIST |
- CON_UPDATE_STATUS;
- }
- if (cp->update_flags & CON_UPDATE_ERASE) {
- /* Use erase write alternate to initialize display. */
- raw3270_request_set_cmd(wrq, TC_EWRITEA);
- updated |= CON_UPDATE_ERASE;
- } else
- raw3270_request_set_cmd(wrq, TC_WRITE);
-
- wcc = TW_NONE;
- raw3270_request_add_data(wrq, &wcc, 1);
-
- /*
- * Update status line.
- */
- if (cp->update_flags & CON_UPDATE_STATUS)
- if (raw3270_request_add_data(wrq, cp->status->string,
- cp->status->len) == 0)
- updated |= CON_UPDATE_STATUS;
-
- if (cp->update_flags & CON_UPDATE_LIST) {
- prolog[0] = TO_SBA;
- prolog[3] = TO_SA;
- prolog[4] = TAT_COLOR;
- prolog[5] = TAC_TURQ;
- raw3270_buffer_address(cp->view.dev, prolog + 1,
- cp->view.cols * cp->line_nr);
- raw3270_request_add_data(wrq, prolog, 6);
- /* Write strings in the update list to the screen. */
- list_for_each_entry_safe(s, n, &cp->update, update) {
- if (s != cp->cline)
- con3270_update_string(cp, s, cp->line_nr);
- if (raw3270_request_add_data(wrq, s->string,
- s->len) != 0)
- break;
- list_del_init(&s->update);
- if (s != cp->cline)
- cp->line_nr++;
- }
- if (list_empty(&cp->update))
- updated |= CON_UPDATE_LIST;
- }
- wrq->callback = con3270_write_callback;
- rc = raw3270_start(&cp->view, wrq);
- if (rc == 0) {
- cp->update_flags &= ~updated;
- if (cp->update_flags)
- con3270_set_timer(cp, 1);
- } else {
- raw3270_request_reset(wrq);
- xchg(&cp->write, wrq);
- }
- spin_unlock_irqrestore(&cp->view.lock, flags);
-}
-
-/*
- * Read tasklet.
- */
-static void
-con3270_read_tasklet(unsigned long data)
-{
- static char kreset_data = TW_KR;
- struct raw3270_request *rrq;
- struct con3270 *cp;
- unsigned long flags;
- int nr_up, deactivate;
-
- rrq = (struct raw3270_request *)data;
- cp = (struct con3270 *) rrq->view;
- spin_lock_irqsave(&cp->view.lock, flags);
- nr_up = cp->nr_up;
- deactivate = 0;
- /* Check aid byte. */
- switch (cp->input->string[0]) {
- case 0x7d: /* enter: jump to bottom. */
- nr_up = 0;
- break;
- case 0xf3: /* PF3: deactivate the console view. */
- deactivate = 1;
- break;
- case 0x6d: /* clear: start from scratch. */
- cp->update_flags = CON_UPDATE_ALL;
- con3270_set_timer(cp, 1);
- break;
- case 0xf7: /* PF7: do a page up in the console log. */
- nr_up += cp->view.rows - 2;
- if (nr_up + cp->view.rows - 1 > cp->nr_lines) {
- nr_up = cp->nr_lines - cp->view.rows + 1;
- if (nr_up < 0)
- nr_up = 0;
- }
- break;
- case 0xf8: /* PF8: do a page down in the console log. */
- nr_up -= cp->view.rows - 2;
- if (nr_up < 0)
- nr_up = 0;
- break;
- }
- if (nr_up != cp->nr_up) {
- cp->nr_up = nr_up;
- con3270_rebuild_update(cp);
- con3270_update_status(cp);
- con3270_set_timer(cp, 1);
- }
- spin_unlock_irqrestore(&cp->view.lock, flags);
-
- /* Start keyboard reset command. */
- raw3270_request_reset(cp->kreset);
- raw3270_request_set_cmd(cp->kreset, TC_WRITE);
- raw3270_request_add_data(cp->kreset, &kreset_data, 1);
- raw3270_start(&cp->view, cp->kreset);
-
- if (deactivate)
- raw3270_deactivate_view(&cp->view);
-
- raw3270_request_reset(rrq);
- xchg(&cp->read, rrq);
- raw3270_put_view(&cp->view);
-}
-
-/*
- * Read request completion callback.
- */
-static void
-con3270_read_callback(struct raw3270_request *rq, void *data)
-{
- raw3270_get_view(rq->view);
- /* Schedule tasklet to pass input to tty. */
- tasklet_schedule(&((struct con3270 *) rq->view)->readlet);
-}
-
-/*
- * Issue a read request. Called only from interrupt function.
- */
-static void
-con3270_issue_read(struct con3270 *cp)
-{
- struct raw3270_request *rrq;
- int rc;
-
- rrq = xchg(&cp->read, 0);
- if (!rrq)
- /* Read already scheduled. */
- return;
- rrq->callback = con3270_read_callback;
- rrq->callback_data = cp;
- raw3270_request_set_cmd(rrq, TC_READMOD);
- raw3270_request_set_data(rrq, cp->input->string, cp->input->len);
- /* Issue the read modified request. */
- rc = raw3270_start_irq(&cp->view, rrq);
- if (rc)
- raw3270_request_reset(rrq);
-}
-
-/*
- * Switch to the console view.
- */
-static int
-con3270_activate(struct raw3270_view *view)
-{
- struct con3270 *cp;
-
- cp = (struct con3270 *) view;
- cp->update_flags = CON_UPDATE_ALL;
- con3270_set_timer(cp, 1);
- return 0;
-}
-
-static void
-con3270_deactivate(struct raw3270_view *view)
-{
- struct con3270 *cp;
-
- cp = (struct con3270 *) view;
- del_timer(&cp->timer);
-}
-
-static void
-con3270_irq(struct con3270 *cp, struct raw3270_request *rq, struct irb *irb)
-{
- /* Handle ATTN. Schedule tasklet to read aid. */
- if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION)
- con3270_issue_read(cp);
-
- if (rq) {
- if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
- rq->rc = -EIO;
- else
- /* Normal end. Copy residual count. */
- rq->rescnt = irb->scsw.cmd.count;
- } else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
- /* Interrupt without an outstanding request -> update all */
- cp->update_flags = CON_UPDATE_ALL;
- con3270_set_timer(cp, 1);
- }
-}
-
-/* Console view to a 3270 device. */
-static struct raw3270_fn con3270_fn = {
- .activate = con3270_activate,
- .deactivate = con3270_deactivate,
- .intv = (void *) con3270_irq
-};
-
-static inline void
-con3270_cline_add(struct con3270 *cp)
-{
- if (!list_empty(&cp->cline->list))
- /* Already added. */
- return;
- list_add_tail(&cp->cline->list, &cp->lines);
- cp->nr_lines++;
- con3270_rebuild_update(cp);
-}
-
-static inline void
-con3270_cline_insert(struct con3270 *cp, unsigned char c)
-{
- cp->cline->string[cp->cline->len++] =
- cp->view.ascebc[(c < ' ') ? ' ' : c];
- if (list_empty(&cp->cline->update)) {
- list_add_tail(&cp->cline->update, &cp->update);
- cp->update_flags |= CON_UPDATE_LIST;
- }
-}
-
-static inline void
-con3270_cline_end(struct con3270 *cp)
-{
- struct string *s;
- unsigned int size;
-
- /* Copy cline. */
- size = (cp->cline->len < cp->view.cols - 5) ?
- cp->cline->len + 4 : cp->view.cols;
- s = con3270_alloc_string(cp, size);
- memcpy(s->string, cp->cline->string, cp->cline->len);
- if (cp->cline->len < cp->view.cols - 5) {
- s->string[s->len - 4] = TO_RA;
- s->string[s->len - 1] = 0;
- } else {
- while (--size >= cp->cline->len)
- s->string[size] = cp->view.ascebc[' '];
- }
- /* Replace cline with allocated line s and reset cline. */
- list_add(&s->list, &cp->cline->list);
- list_del_init(&cp->cline->list);
- if (!list_empty(&cp->cline->update)) {
- list_add(&s->update, &cp->cline->update);
- list_del_init(&cp->cline->update);
- }
- cp->cline->len = 0;
-}
-
-/*
- * Write a string to the 3270 console
- */
-static void
-con3270_write(struct console *co, const char *str, unsigned int count)
-{
- struct con3270 *cp;
- unsigned long flags;
- unsigned char c;
-
- cp = condev;
- spin_lock_irqsave(&cp->view.lock, flags);
- while (count-- > 0) {
- c = *str++;
- if (cp->cline->len == 0)
- con3270_cline_add(cp);
- if (c != '\n')
- con3270_cline_insert(cp, c);
- if (c == '\n' || cp->cline->len >= cp->view.cols)
- con3270_cline_end(cp);
- }
- /* Setup timer to output current console buffer after 1/10 second */
- cp->nr_up = 0;
- if (cp->view.dev && !timer_pending(&cp->timer))
- con3270_set_timer(cp, HZ/10);
- spin_unlock_irqrestore(&cp->view.lock,flags);
-}
-
-static struct tty_driver *
-con3270_device(struct console *c, int *index)
-{
- *index = c->index;
- return tty3270_driver;
-}
-
-/*
- * Wait for end of write request.
- */
-static void
-con3270_wait_write(struct con3270 *cp)
-{
- while (!cp->write) {
- raw3270_wait_cons_dev(cp->view.dev);
- barrier();
- }
-}
-
-/*
- * The below function is called as a panic/reboot notifier before the
- * system enters a disabled, endless loop.
- *
- * Notice we must use the spin_trylock() alternative, to prevent lockups
- * in atomic context (panic routine runs with secondary CPUs, local IRQs
- * and preemption disabled).
- */
-static int con3270_notify(struct notifier_block *self,
- unsigned long event, void *data)
-{
- struct con3270 *cp;
- unsigned long flags;
-
- cp = condev;
- if (!cp->view.dev)
- return NOTIFY_DONE;
- if (!raw3270_view_lock_unavailable(&cp->view))
- raw3270_activate_view(&cp->view);
- if (!spin_trylock_irqsave(&cp->view.lock, flags))
- return NOTIFY_DONE;
- con3270_wait_write(cp);
- cp->nr_up = 0;
- con3270_rebuild_update(cp);
- con3270_update_status(cp);
- while (cp->update_flags != 0) {
- spin_unlock_irqrestore(&cp->view.lock, flags);
- con3270_update(&cp->timer);
- spin_lock_irqsave(&cp->view.lock, flags);
- con3270_wait_write(cp);
- }
- spin_unlock_irqrestore(&cp->view.lock, flags);
-
- return NOTIFY_DONE;
-}
-
-static struct notifier_block on_panic_nb = {
- .notifier_call = con3270_notify,
- .priority = INT_MIN + 1, /* run the callback late */
-};
-
-static struct notifier_block on_reboot_nb = {
- .notifier_call = con3270_notify,
- .priority = INT_MIN + 1, /* run the callback late */
-};
-
-/*
- * The console structure for the 3270 console
- */
-static struct console con3270 = {
- .name = "tty3270",
- .write = con3270_write,
- .device = con3270_device,
- .flags = CON_PRINTBUFFER,
-};
-
-/*
- * 3270 console initialization code called from console_init().
- */
-static int __init
-con3270_init(void)
-{
- struct raw3270 *rp;
- void *cbuf;
- int i;
-
- /* Check if 3270 is to be the console */
- if (!CONSOLE_IS_3270)
- return -ENODEV;
-
- /* Set the console mode for VM */
- if (MACHINE_IS_VM) {
- cpcmd("TERM CONMODE 3270", NULL, 0, NULL);
- cpcmd("TERM AUTOCR OFF", NULL, 0, NULL);
- }
-
- rp = raw3270_setup_console();
- if (IS_ERR(rp))
- return PTR_ERR(rp);
-
- condev = kzalloc(sizeof(struct con3270), GFP_KERNEL | GFP_DMA);
- if (!condev)
- return -ENOMEM;
- condev->view.dev = rp;
-
- condev->read = raw3270_request_alloc(0);
- condev->read->callback = con3270_read_callback;
- condev->read->callback_data = condev;
- condev->write = raw3270_request_alloc(CON3270_OUTPUT_BUFFER_SIZE);
- condev->kreset = raw3270_request_alloc(1);
-
- INIT_LIST_HEAD(&condev->lines);
- INIT_LIST_HEAD(&condev->update);
- timer_setup(&condev->timer, con3270_update, 0);
- tasklet_init(&condev->readlet, con3270_read_tasklet,
- (unsigned long) condev->read);
-
- raw3270_add_view(&condev->view, &con3270_fn, 1, RAW3270_VIEW_LOCK_IRQ);
-
- INIT_LIST_HEAD(&condev->freemem);
- for (i = 0; i < CON3270_STRING_PAGES; i++) {
- cbuf = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
- add_string_memory(&condev->freemem, cbuf, PAGE_SIZE);
- }
- condev->cline = alloc_string(&condev->freemem, condev->view.cols);
- condev->cline->len = 0;
- con3270_create_status(condev);
- condev->input = alloc_string(&condev->freemem, 80);
- atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
- register_reboot_notifier(&on_reboot_nb);
- register_console(&con3270);
- return 0;
-}
-
-console_initcall(con3270_init);
#include <linux/console.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
-
+#include <linux/panic_notifier.h>
+#include <linux/reboot.h>
#include <linux/slab.h>
#include <linux/memblock.h>
#include <linux/compat.h>
#include <asm/ccwdev.h>
#include <asm/cio.h>
#include <asm/ebcdic.h>
+#include <asm/cpcmd.h>
#include <linux/uaccess.h>
#include "raw3270.h"
-#include "tty3270.h"
#include "keyboard.h"
#define TTY3270_CHAR_BUF_SIZE 256
#define TTY3270_OUTPUT_BUFFER_SIZE 1024
#define TTY3270_STRING_PAGES 5
-struct tty_driver *tty3270_driver;
+static struct tty_driver *tty3270_driver;
static int tty3270_max_index;
-
+static struct tty3270 *condev;
static struct raw3270_fn tty3270_fn;
struct tty3270_cell {
return;
}
- spin_lock(&tp->view.lock);
+ spin_lock_irq(&tp->view.lock);
updated = 0;
if (tp->update_flags & TTY_UPDATE_ALL) {
tty3270_rebuild_update(tp);
raw3270_request_reset(wrq);
xchg(&tp->write, wrq);
}
- spin_unlock(&tp->view.lock);
+ spin_unlock_irq(&tp->view.lock);
}
/*
struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
struct string *s;
- spin_lock_bh(&tp->view.lock);
+ spin_lock_irq(&tp->view.lock);
if (tp->inattr == TF_INPUT) {
if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines)
tp->rcl_walk = tp->rcl_walk->prev;
tty3270_update_prompt(tp, NULL, 0);
tty3270_set_timer(tp, 1);
}
- spin_unlock_bh(&tp->view.lock);
+ spin_unlock_irq(&tp->view.lock);
}
/*
struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
int nr_up;
- spin_lock_bh(&tp->view.lock);
+ spin_lock_irq(&tp->view.lock);
nr_up = tp->nr_up - tp->view.rows + 2;
if (nr_up < 0)
nr_up = 0;
tty3270_update_status(tp);
tty3270_set_timer(tp, 1);
}
- spin_unlock_bh(&tp->view.lock);
+ spin_unlock_irq(&tp->view.lock);
}
/*
struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
int nr_up;
- spin_lock_bh(&tp->view.lock);
+ spin_lock_irq(&tp->view.lock);
nr_up = tp->nr_up + tp->view.rows - 2;
if (nr_up + tp->view.rows - 2 > tp->nr_lines)
nr_up = tp->nr_lines - tp->view.rows + 2;
tty3270_update_status(tp);
tty3270_set_timer(tp, 1);
}
- spin_unlock_bh(&tp->view.lock);
+ spin_unlock_irq(&tp->view.lock);
}
/*
char *input;
int len;
- spin_lock_bh(&tp->view.lock);
+ spin_lock_irq(&tp->view.lock);
/*
* Two AID keys are special: For 0x7d (enter) the input line
* has to be emitted to the tty and for 0x6d the screen
tp->update_flags = TTY_UPDATE_ALL;
tty3270_set_timer(tp, 1);
}
- spin_unlock_bh(&tp->view.lock);
+ spin_unlock_irq(&tp->view.lock);
/* Start keyboard reset command. */
raw3270_request_reset(tp->kreset);
if (IS_ERR(screen))
return;
/* Switch to new output size */
- spin_lock_bh(&tp->view.lock);
+ spin_lock_irq(&tp->view.lock);
tty3270_blank_screen(tp);
oscreen = tp->screen;
orows = tp->view.rows;
while (tp->nr_lines < tp->view.rows - 2)
tty3270_blank_line(tp);
tp->update_flags = TTY_UPDATE_ALL;
- spin_unlock_bh(&tp->view.lock);
+ spin_unlock_irq(&tp->view.lock);
tty3270_free_screen(oscreen, orows);
tty3270_set_timer(tp, 1);
/* Informat tty layer about new size */
rc = raw3270_add_view(&tp->view, &tty3270_fn,
index + RAW3270_FIRSTMINOR,
- RAW3270_VIEW_LOCK_BH);
+ RAW3270_VIEW_LOCK_IRQ);
if (rc) {
tty3270_free_view(tp);
return rc;
{
int i_msg, i;
- spin_lock_bh(&tp->view.lock);
+ spin_lock_irq(&tp->view.lock);
for (i_msg = 0; !tty->flow.stopped && i_msg < count; i_msg++) {
if (tp->esc_state != 0) {
/* Continue escape sequence. */
if (!timer_pending(&tp->timer))
tty3270_set_timer(tp, HZ/10);
- spin_unlock_bh(&tp->view.lock);
+ spin_unlock_irq(&tp->view.lock);
}
/*
tp = tty->driver_data;
if (!tp)
return;
- spin_lock_bh(&tp->view.lock);
+ spin_lock_irq(&tp->view.lock);
if (L_ICANON(tty)) {
new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN;
if (new != tp->inattr) {
tty3270_set_timer(tp, 1);
}
}
- spin_unlock_bh(&tp->view.lock);
+ spin_unlock_irq(&tp->view.lock);
}
/*
tp = tty->driver_data;
if (!tp)
return;
- spin_lock_bh(&tp->view.lock);
+ spin_lock_irq(&tp->view.lock);
tp->cx = tp->saved_cx = 0;
tp->cy = tp->saved_cy = 0;
tp->highlight = tp->saved_highlight = TAX_RESET;
while (tp->nr_lines < tp->view.rows - 2)
tty3270_blank_line(tp);
tp->update_flags = TTY_UPDATE_ALL;
- spin_unlock_bh(&tp->view.lock);
+ spin_unlock_irq(&tp->view.lock);
tty3270_set_timer(tp, 1);
}
tty3270_del_views();
}
+#if IS_ENABLED(CONFIG_TN3270_CONSOLE)
+static void
+con3270_write(struct console *co, const char *str, unsigned int count)
+{
+ struct tty3270 *tp = co->data;
+ unsigned long flags;
+ char c;
+
+ spin_lock_irqsave(&tp->view.lock, flags);
+ while (count--) {
+ c = *str++;
+ if (c == 0x0a) {
+ tty3270_cr(tp);
+ tty3270_lf(tp);
+ } else {
+ if (tp->cx >= tp->view.cols) {
+ tty3270_cr(tp);
+ tty3270_lf(tp);
+ }
+ tty3270_put_character(tp, c);
+ tp->cx++;
+ }
+ }
+ spin_unlock_irqrestore(&tp->view.lock, flags);
+}
+
+static struct tty_driver *
+con3270_device(struct console *c, int *index)
+{
+ *index = c->index;
+ return tty3270_driver;
+}
+
+static void
+con3270_wait_write(struct tty3270 *tp)
+{
+ while (!tp->write) {
+ raw3270_wait_cons_dev(tp->view.dev);
+ barrier();
+ }
+}
+
+/*
+ * The below function is called as a panic/reboot notifier before the
+ * system enters a disabled, endless loop.
+ *
+ * Notice we must use the spin_trylock() alternative, to prevent lockups
+ * in atomic context (panic routine runs with secondary CPUs, local IRQs
+ * and preemption disabled).
+ */
+static int con3270_notify(struct notifier_block *self,
+ unsigned long event, void *data)
+{
+ struct tty3270 *tp;
+ unsigned long flags;
+
+ tp = condev;
+ if (!tp->view.dev)
+ return NOTIFY_DONE;
+ if (!raw3270_view_lock_unavailable(&tp->view))
+ raw3270_activate_view(&tp->view);
+ if (!spin_trylock_irqsave(&tp->view.lock, flags))
+ return NOTIFY_DONE;
+ con3270_wait_write(tp);
+ tp->nr_up = 0;
+ while (tp->update_flags != 0) {
+ spin_unlock_irqrestore(&tp->view.lock, flags);
+ tty3270_update(&tp->timer);
+ spin_lock_irqsave(&tp->view.lock, flags);
+ con3270_wait_write(tp);
+ }
+ spin_unlock_irqrestore(&tp->view.lock, flags);
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block on_panic_nb = {
+ .notifier_call = con3270_notify,
+ .priority = INT_MIN + 1, /* run the callback late */
+};
+
+static struct notifier_block on_reboot_nb = {
+ .notifier_call = con3270_notify,
+ .priority = INT_MIN + 1, /* run the callback late */
+};
+
+static struct console con3270 = {
+ .name = "tty3270",
+ .write = con3270_write,
+ .device = con3270_device,
+ .flags = CON_PRINTBUFFER,
+};
+
+static int __init
+con3270_init(void)
+{
+ struct raw3270_view *view;
+ struct raw3270 *rp;
+ struct tty3270 *tp;
+ int rc;
+
+ /* Check if 3270 is to be the console */
+ if (!CONSOLE_IS_3270)
+ return -ENODEV;
+
+ /* Set the console mode for VM */
+ if (MACHINE_IS_VM) {
+ cpcmd("TERM CONMODE 3270", NULL, 0, NULL);
+ cpcmd("TERM AUTOCR OFF", NULL, 0, NULL);
+ }
+
+ rp = raw3270_setup_console();
+ if (IS_ERR(rp))
+ return PTR_ERR(rp);
+
+ /* Check if the tty3270 is already there. */
+ view = raw3270_find_view(&tty3270_fn, RAW3270_FIRSTMINOR);
+ if (IS_ERR(view)) {
+ rc = tty3270_create_view(0, &tp);
+ if (rc)
+ return rc;
+ } else {
+ tp = container_of(view, struct tty3270, view);
+ tp->inattr = TF_INPUT;
+ }
+ con3270.data = tp;
+ condev = tp;
+ atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
+ register_reboot_notifier(&on_reboot_nb);
+ register_console(&con3270);
+ return 0;
+}
+console_initcall(con3270_init);
+#endif
+
MODULE_LICENSE("GPL");
MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR);
projects / linux.git / commitdiff