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-rw-r--r--hw/char/Makefile.objs1
-rw-r--r--hw/char/terminal3270.c293
-rw-r--r--hw/s390x/3270-ccw.c174
-rw-r--r--hw/s390x/Makefile.objs1
-rw-r--r--hw/s390x/css.c24
5 files changed, 493 insertions, 0 deletions
diff --git a/hw/char/Makefile.objs b/hw/char/Makefile.objs
index 725fdc46f4..55fcb68fd2 100644
--- a/hw/char/Makefile.objs
+++ b/hw/char/Makefile.objs
@@ -29,3 +29,4 @@ common-obj-$(CONFIG_MILKYMIST) += milkymist-uart.o
common-obj-$(CONFIG_SCLPCONSOLE) += sclpconsole.o sclpconsole-lm.o
obj-$(CONFIG_VIRTIO) += virtio-serial-bus.o
+obj-$(CONFIG_TERMINAL3270) += terminal3270.o
diff --git a/hw/char/terminal3270.c b/hw/char/terminal3270.c
new file mode 100644
index 0000000000..b2dda01baa
--- /dev/null
+++ b/hw/char/terminal3270.c
@@ -0,0 +1,293 @@
+/*
+ * Terminal 3270 implementation
+ *
+ * Copyright 2017 IBM Corp.
+ *
+ * Authors: Yang Chen <bjcyang@linux.vnet.ibm.com>
+ * Jing Liu <liujbjl@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "sysemu/char.h"
+#include "hw/s390x/3270-ccw.h"
+
+/* Enough spaces for different window sizes. */
+#define INPUT_BUFFER_SIZE 1000
+/*
+ * 1 for header, 1024*2 for datastream, 2 for tail
+ * Reserve enough spaces for telnet IAC escape.
+ */
+#define OUTPUT_BUFFER_SIZE 2051
+
+typedef struct Terminal3270 {
+ EmulatedCcw3270Device cdev;
+ CharBackend chr;
+ uint8_t inv[INPUT_BUFFER_SIZE];
+ uint8_t outv[OUTPUT_BUFFER_SIZE];
+ int in_len;
+ int out_len;
+ bool handshake_done;
+ guint timer_tag;
+} Terminal3270;
+
+#define TYPE_TERMINAL_3270 "x-terminal3270"
+#define TERMINAL_3270(obj) \
+ OBJECT_CHECK(Terminal3270, (obj), TYPE_TERMINAL_3270)
+
+static int terminal_can_read(void *opaque)
+{
+ Terminal3270 *t = opaque;
+
+ return INPUT_BUFFER_SIZE - t->in_len;
+}
+
+/*
+ * Protocol handshake done,
+ * signal guest by an unsolicited DE irq.
+ */
+static void TN3270_handshake_done(Terminal3270 *t)
+{
+ CcwDevice *ccw_dev = CCW_DEVICE(t);
+ SubchDev *sch = ccw_dev->sch;
+
+ t->handshake_done = true;
+ sch->curr_status.scsw.dstat = SCSW_DSTAT_DEVICE_END;
+ css_conditional_io_interrupt(sch);
+}
+
+/*
+ * Called when the interval is timeout to detect
+ * if the client is still alive by Timing Mark.
+ */
+static gboolean send_timing_mark_cb(gpointer opaque)
+{
+ Terminal3270 *t = opaque;
+ const uint8_t timing[] = {0xff, 0xfd, 0x06};
+
+ qemu_chr_fe_write_all(&t->chr, timing, sizeof(timing));
+ return true;
+}
+
+/*
+ * Receive inbound data from socket.
+ * For data given to guest, drop the data boundary IAC, IAC_EOR.
+ * TODO:
+ * Using "Reset" key on x3270 may result multiple commands in one packet.
+ * This usually happens when the user meets a poor traffic of the network.
+ * As of now, for such case, we simply terminate the connection,
+ * and we should come back here later with a better solution.
+ */
+static void terminal_read(void *opaque, const uint8_t *buf, int size)
+{
+ Terminal3270 *t = opaque;
+ CcwDevice *ccw_dev = CCW_DEVICE(t);
+ SubchDev *sch = ccw_dev->sch;
+ int end;
+
+ assert(size <= (INPUT_BUFFER_SIZE - t->in_len));
+
+ if (t->timer_tag) {
+ g_source_remove(t->timer_tag);
+ t->timer_tag = 0;
+ }
+ t->timer_tag = g_timeout_add_seconds(600, send_timing_mark_cb, t);
+
+ memcpy(&t->inv[t->in_len], buf, size);
+ t->in_len += size;
+ if (t->in_len < 2) {
+ return;
+ }
+
+ if (!t->handshake_done) {
+ /*
+ * Receiving Terminal Type is the last step of handshake.
+ * The data format: IAC SB Terminal-Type IS <terminal type> IAC SE
+ * The code for Terminal-Type is 0x18, for IS is 0.
+ * Simply check the data format and mark handshake_done.
+ */
+ if (t->in_len > 6 && t->inv[2] == 0x18 && t->inv[3] == 0x0 &&
+ t->inv[t->in_len - 2] == IAC && t->inv[t->in_len - 1] == IAC_SE) {
+ TN3270_handshake_done(t);
+ t->in_len = 0;
+ }
+ return;
+ }
+
+ for (end = 0; end < t->in_len - 1; end++) {
+ if (t->inv[end] == IAC && t->inv[end + 1] == IAC_EOR) {
+ break;
+ }
+ }
+ if (end == t->in_len - 2) {
+ /* Data is valid for consuming. */
+ t->in_len -= 2;
+ sch->curr_status.scsw.dstat = SCSW_DSTAT_ATTENTION;
+ css_conditional_io_interrupt(sch);
+ } else if (end < t->in_len - 2) {
+ /* "Reset" key is used. */
+ qemu_chr_fe_disconnect(&t->chr);
+ } else {
+ /* Gathering data. */
+ return;
+ }
+}
+
+static void chr_event(void *opaque, int event)
+{
+ Terminal3270 *t = opaque;
+ CcwDevice *ccw_dev = CCW_DEVICE(t);
+ SubchDev *sch = ccw_dev->sch;
+
+ /* Ensure the initial status correct, always reset them. */
+ t->in_len = 0;
+ t->out_len = 0;
+ t->handshake_done = false;
+ if (t->timer_tag) {
+ g_source_remove(t->timer_tag);
+ t->timer_tag = 0;
+ }
+
+ switch (event) {
+ case CHR_EVENT_OPENED:
+ /*
+ * 3270 does handshake firstly by the negotiate options in
+ * char-socket.c. Once qemu receives the terminal-type of the
+ * client, mark handshake done and trigger everything rolling again.
+ */
+ t->timer_tag = g_timeout_add_seconds(600, send_timing_mark_cb, t);
+ break;
+ case CHR_EVENT_CLOSED:
+ sch->curr_status.scsw.dstat = SCSW_DSTAT_DEVICE_END;
+ css_conditional_io_interrupt(sch);
+ break;
+ }
+}
+
+static void terminal_init(EmulatedCcw3270Device *dev, Error **errp)
+{
+ Terminal3270 *t = TERMINAL_3270(dev);
+ static bool terminal_available;
+
+ if (terminal_available) {
+ error_setg(errp, "Multiple 3270 terminals are not supported.");
+ return;
+ }
+ terminal_available = true;
+ qemu_chr_fe_set_handlers(&t->chr, terminal_can_read,
+ terminal_read, chr_event, t, NULL, true);
+}
+
+static int read_payload_3270(EmulatedCcw3270Device *dev, uint32_t cda,
+ uint16_t count)
+{
+ Terminal3270 *t = TERMINAL_3270(dev);
+ int len;
+
+ len = MIN(count, t->in_len);
+ cpu_physical_memory_write(cda, t->inv, len);
+ t->in_len -= len;
+
+ return len;
+}
+
+/* TN3270 uses binary transmission, which needs escape IAC to IAC IAC */
+static int insert_IAC_escape_char(uint8_t *outv, int out_len)
+{
+ int IAC_num = 0, new_out_len, i, j;
+
+ for (i = 0; i < out_len; i++) {
+ if (outv[i] == IAC) {
+ IAC_num++;
+ }
+ }
+ if (IAC_num == 0) {
+ return out_len;
+ }
+ new_out_len = out_len + IAC_num;
+ for (i = out_len - 1, j = new_out_len - 1; j > i && i >= 0; i--, j--) {
+ outv[j] = outv[i];
+ if (outv[i] == IAC) {
+ outv[--j] = IAC;
+ }
+ }
+ return new_out_len;
+}
+
+/*
+ * Write 3270 outbound to socket.
+ * Return the count of 3270 data field if succeeded, zero if failed.
+ */
+static int write_payload_3270(EmulatedCcw3270Device *dev, uint8_t cmd,
+ uint32_t cda, uint16_t count)
+{
+ Terminal3270 *t = TERMINAL_3270(dev);
+ int retval = 0;
+
+ assert(count <= (OUTPUT_BUFFER_SIZE - 3) / 2);
+
+ if (!t->handshake_done) {
+ if (!(t->outv[0] == IAC && t->outv[1] != IAC)) {
+ /*
+ * Before having finished 3270 negotiation,
+ * sending outbound data except protocol options is prohibited.
+ */
+ return 0;
+ }
+ }
+ if (!qemu_chr_fe_get_driver(&t->chr)) {
+ /* We just say we consumed all data if there's no backend. */
+ return count;
+ }
+ t->outv[0] = cmd;
+ cpu_physical_memory_read(cda, &t->outv[1], count);
+ t->out_len = count + 1;
+
+ t->out_len = insert_IAC_escape_char(t->outv, t->out_len);
+ t->outv[t->out_len++] = IAC;
+ t->outv[t->out_len++] = IAC_EOR;
+
+ retval = qemu_chr_fe_write_all(&t->chr, t->outv, t->out_len);
+ return (retval <= 0) ? 0 : (retval - 3);
+}
+
+static Property terminal_properties[] = {
+ DEFINE_PROP_CHR("chardev", Terminal3270, chr),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static const VMStateDescription terminal3270_vmstate = {
+ .name = TYPE_TERMINAL_3270,
+ .unmigratable = 1,
+};
+
+static void terminal_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ EmulatedCcw3270Class *ck = EMULATED_CCW_3270_CLASS(klass);
+
+ dc->props = terminal_properties;
+ dc->vmsd = &terminal3270_vmstate;
+ ck->init = terminal_init;
+ ck->read_payload_3270 = read_payload_3270;
+ ck->write_payload_3270 = write_payload_3270;
+}
+
+static const TypeInfo ccw_terminal_info = {
+ .name = TYPE_TERMINAL_3270,
+ .parent = TYPE_EMULATED_CCW_3270,
+ .instance_size = sizeof(Terminal3270),
+ .class_init = terminal_class_init,
+ .class_size = sizeof(EmulatedCcw3270Class),
+};
+
+static void register_types(void)
+{
+ type_register_static(&ccw_terminal_info);
+}
+
+type_init(register_types)
diff --git a/hw/s390x/3270-ccw.c b/hw/s390x/3270-ccw.c
new file mode 100644
index 0000000000..a7a5b412e4
--- /dev/null
+++ b/hw/s390x/3270-ccw.c
@@ -0,0 +1,174 @@
+/*
+ * Emulated ccw-attached 3270 implementation
+ *
+ * Copyright 2017 IBM Corp.
+ * Author(s): Yang Chen <bjcyang@linux.vnet.ibm.com>
+ * Jing Liu <liujbjl@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/module.h"
+#include "cpu.h"
+#include "hw/s390x/css.h"
+#include "hw/s390x/css-bridge.h"
+#include "hw/s390x/3270-ccw.h"
+
+/* Handle READ ccw commands from guest */
+static int handle_payload_3270_read(EmulatedCcw3270Device *dev, CCW1 *ccw)
+{
+ EmulatedCcw3270Class *ck = EMULATED_CCW_3270_GET_CLASS(dev);
+ CcwDevice *ccw_dev = CCW_DEVICE(dev);
+ int len;
+
+ if (!ccw->cda) {
+ return -EFAULT;
+ }
+
+ len = ck->read_payload_3270(dev, ccw->cda, ccw->count);
+ ccw_dev->sch->curr_status.scsw.count = ccw->count - len;
+
+ return 0;
+}
+
+/* Handle WRITE ccw commands to write data to client */
+static int handle_payload_3270_write(EmulatedCcw3270Device *dev, CCW1 *ccw)
+{
+ EmulatedCcw3270Class *ck = EMULATED_CCW_3270_GET_CLASS(dev);
+ CcwDevice *ccw_dev = CCW_DEVICE(dev);
+ int len;
+
+ if (!ccw->cda) {
+ return -EFAULT;
+ }
+
+ len = ck->write_payload_3270(dev, ccw->cmd_code, ccw->cda, ccw->count);
+
+ if (len <= 0) {
+ return -EIO;
+ }
+
+ ccw_dev->sch->curr_status.scsw.count = ccw->count - len;
+ return 0;
+}
+
+static int emulated_ccw_3270_cb(SubchDev *sch, CCW1 ccw)
+{
+ int rc = 0;
+ EmulatedCcw3270Device *dev = sch->driver_data;
+
+ switch (ccw.cmd_code) {
+ case TC_WRITESF:
+ case TC_WRITE:
+ case TC_EWRITE:
+ case TC_EWRITEA:
+ rc = handle_payload_3270_write(dev, &ccw);
+ break;
+ case TC_RDBUF:
+ case TC_READMOD:
+ rc = handle_payload_3270_read(dev, &ccw);
+ break;
+ default:
+ rc = -ENOSYS;
+ break;
+ }
+
+ if (rc == -EIO) {
+ /* I/O error, specific devices generate specific conditions */
+ SCSW *s = &sch->curr_status.scsw;
+
+ sch->curr_status.scsw.dstat = SCSW_DSTAT_UNIT_CHECK;
+ sch->sense_data[0] = 0x40; /* intervention-req */
+ s->ctrl &= ~SCSW_ACTL_START_PEND;
+ s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
+ s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
+ SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
+ }
+
+ return rc;
+}
+
+static void emulated_ccw_3270_realize(DeviceState *ds, Error **errp)
+{
+ uint16_t chpid;
+ EmulatedCcw3270Device *dev = EMULATED_CCW_3270(ds);
+ EmulatedCcw3270Class *ck = EMULATED_CCW_3270_GET_CLASS(dev);
+ CcwDevice *cdev = CCW_DEVICE(ds);
+ CCWDeviceClass *cdk = CCW_DEVICE_GET_CLASS(cdev);
+ SubchDev *sch = css_create_virtual_sch(cdev->devno, errp);
+ Error *err = NULL;
+
+ if (!sch) {
+ return;
+ }
+
+ if (!ck->init) {
+ goto out_err;
+ }
+
+ sch->driver_data = dev;
+ cdev->sch = sch;
+ chpid = css_find_free_chpid(sch->cssid);
+
+ if (chpid > MAX_CHPID) {
+ error_setg(&err, "No available chpid to use.");
+ goto out_err;
+ }
+
+ sch->id.reserved = 0xff;
+ sch->id.cu_type = EMULATED_CCW_3270_CU_TYPE;
+ css_sch_build_virtual_schib(sch, (uint8_t)chpid,
+ EMULATED_CCW_3270_CHPID_TYPE);
+ sch->ccw_cb = emulated_ccw_3270_cb;
+
+ ck->init(dev, &err);
+ if (err) {
+ goto out_err;
+ }
+
+ cdk->realize(cdev, &err);
+ if (err) {
+ goto out_err;
+ }
+
+ return;
+
+out_err:
+ error_propagate(errp, err);
+ css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
+ cdev->sch = NULL;
+ g_free(sch);
+}
+
+static Property emulated_ccw_3270_properties[] = {
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void emulated_ccw_3270_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->props = emulated_ccw_3270_properties;
+ dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
+ dc->realize = emulated_ccw_3270_realize;
+ dc->hotpluggable = false;
+}
+
+static const TypeInfo emulated_ccw_3270_info = {
+ .name = TYPE_EMULATED_CCW_3270,
+ .parent = TYPE_CCW_DEVICE,
+ .instance_size = sizeof(EmulatedCcw3270Device),
+ .class_init = emulated_ccw_3270_class_init,
+ .class_size = sizeof(EmulatedCcw3270Class),
+ .abstract = true,
+};
+
+static void emulated_ccw_register(void)
+{
+ type_register_static(&emulated_ccw_3270_info);
+}
+
+type_init(emulated_ccw_register)
diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs
index 41ac4ec325..36bd4b1645 100644
--- a/hw/s390x/Makefile.objs
+++ b/hw/s390x/Makefile.objs
@@ -7,6 +7,7 @@ obj-y += sclpcpu.o
obj-y += ipl.o
obj-y += css.o
obj-y += s390-virtio-ccw.o
+obj-y += 3270-ccw.o
obj-y += virtio-ccw.o
obj-y += css-bridge.o
obj-y += ccw-device.o
diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index c03bb20bc9..15c4f4b249 100644
--- a/hw/s390x/css.c
+++ b/hw/s390x/css.c
@@ -576,6 +576,9 @@ static void sch_handle_start_func(SubchDev *sch, ORB *orb)
s->dstat = SCSW_DSTAT_CHANNEL_END | SCSW_DSTAT_DEVICE_END;
s->cpa = sch->channel_prog + 8;
break;
+ case -EIO:
+ /* I/O errors, status depends on specific devices */
+ break;
case -ENOSYS:
/* unsupported command, generate unit check (command reject) */
s->ctrl &= ~SCSW_ACTL_START_PEND;
@@ -1302,6 +1305,27 @@ bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid)
(MAX_SCHID + 1) / sizeof(unsigned long));
}
+unsigned int css_find_free_chpid(uint8_t cssid)
+{
+ CssImage *css = channel_subsys.css[cssid];
+ unsigned int chpid;
+
+ if (!css) {
+ return MAX_CHPID + 1;
+ }
+
+ for (chpid = 0; chpid <= MAX_CHPID; chpid++) {
+ /* skip reserved chpid */
+ if (chpid == VIRTIO_CCW_CHPID) {
+ continue;
+ }
+ if (!css->chpids[chpid].in_use) {
+ return chpid;
+ }
+ }
+ return MAX_CHPID + 1;
+}
+
static int css_add_virtual_chpid(uint8_t cssid, uint8_t chpid, uint8_t type)
{
CssImage *css;
generated by cgit v1.2.3 (git 2.26.2) at 2025-01-03 10:27:48 +0000