aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--hw/char/Makefile.objs2
-rw-r--r--hw/char/sclpconsole-lm.c398
-rw-r--r--include/hw/s390x/event-facility.h80
3 files changed, 479 insertions, 1 deletions
diff --git a/hw/char/Makefile.objs b/hw/char/Makefile.objs
index f8f3dbca3e..cbd6a006f4 100644
--- a/hw/char/Makefile.objs
+++ b/hw/char/Makefile.objs
@@ -22,6 +22,6 @@ common-obj-$(CONFIG_IMX) += imx_serial.o
common-obj-$(CONFIG_LM32) += lm32_juart.o
common-obj-$(CONFIG_LM32) += lm32_uart.o
common-obj-$(CONFIG_MILKYMIST) += milkymist-uart.o
-common-obj-$(CONFIG_SCLPCONSOLE) += sclpconsole.o
+common-obj-$(CONFIG_SCLPCONSOLE) += sclpconsole.o sclpconsole-lm.o
obj-$(CONFIG_VIRTIO) += virtio-serial-bus.o
diff --git a/hw/char/sclpconsole-lm.c b/hw/char/sclpconsole-lm.c
new file mode 100644
index 0000000000..93390675d6
--- /dev/null
+++ b/hw/char/sclpconsole-lm.c
@@ -0,0 +1,398 @@
+/*
+ * SCLP event types
+ * Operations Command - Line Mode input
+ * Message - Line Mode output
+ *
+ * Copyright IBM, Corp. 2013
+ *
+ * Authors:
+ * Heinz Graalfs <graalfs@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 "hw/qdev.h"
+#include "qemu/thread.h"
+#include "qemu/error-report.h"
+#include "sysemu/char.h"
+
+#include "hw/s390x/sclp.h"
+#include "hw/s390x/event-facility.h"
+#include "hw/s390x/ebcdic.h"
+
+#define SIZE_BUFFER 4096
+#define NEWLINE "\n"
+
+typedef struct OprtnsCommand {
+ EventBufferHeader header;
+ MDMSU message_unit;
+ char data[0];
+} QEMU_PACKED OprtnsCommand;
+
+/* max size for line-mode data in 4K SCCB page */
+#define SIZE_CONSOLE_BUFFER (SCCB_DATA_LEN - sizeof(OprtnsCommand))
+
+typedef struct SCLPConsoleLM {
+ SCLPEvent event;
+ CharDriverState *chr;
+ bool echo; /* immediate echo of input if true */
+ uint32_t write_errors; /* errors writing to char layer */
+ uint32_t length; /* length of byte stream in buffer */
+ uint8_t buf[SIZE_CONSOLE_BUFFER];
+ qemu_irq irq_console_read;
+} SCLPConsoleLM;
+
+/*
+* Character layer call-back functions
+ *
+ * Allow 1 character at a time
+ *
+ * Accumulate bytes from character layer in console buffer,
+ * event_pending is set when a newline character is encountered
+ *
+ * The maximum command line length is limited by the maximum
+ * space available in an SCCB
+ */
+
+static int chr_can_read(void *opaque)
+{
+ SCLPConsoleLM *scon = opaque;
+
+ if (scon->event.event_pending) {
+ return 0;
+ } else if (SIZE_CONSOLE_BUFFER - scon->length) {
+ return 1;
+ }
+ return 0;
+}
+
+static void receive_from_chr_layer(SCLPConsoleLM *scon, const uint8_t *buf,
+ int size)
+{
+ assert(size == 1);
+
+ if (*buf == '\r' || *buf == '\n') {
+ scon->event.event_pending = true;
+ return;
+ }
+ scon->buf[scon->length] = *buf;
+ scon->length += 1;
+ if (scon->echo) {
+ qemu_chr_fe_write(scon->chr, buf, size);
+ }
+}
+
+/*
+ * Send data from a char device over to the guest
+ */
+static void chr_read(void *opaque, const uint8_t *buf, int size)
+{
+ SCLPConsoleLM *scon = opaque;
+
+ receive_from_chr_layer(scon, buf, size);
+ if (scon->event.event_pending) {
+ /* trigger SCLP read operation */
+ qemu_irq_raise(scon->irq_console_read);
+ }
+}
+
+/* functions to be called by event facility */
+
+static bool can_handle_event(uint8_t type)
+{
+ return type == SCLP_EVENT_MESSAGE || type == SCLP_EVENT_PMSGCMD;
+}
+
+static unsigned int send_mask(void)
+{
+ return SCLP_EVENT_MASK_OP_CMD | SCLP_EVENT_MASK_PMSGCMD;
+}
+
+static unsigned int receive_mask(void)
+{
+ return SCLP_EVENT_MASK_MSG | SCLP_EVENT_MASK_PMSGCMD;
+}
+
+/*
+ * Triggered by SCLP's read_event_data
+ * - convert ASCII byte stream to EBCDIC and
+ * - copy converted data into provided (SCLP) buffer
+ */
+static int get_console_data(SCLPEvent *event, uint8_t *buf, size_t *size,
+ int avail)
+{
+ int len;
+
+ SCLPConsoleLM *cons = DO_UPCAST(SCLPConsoleLM, event, event);
+
+ len = cons->length;
+ /* data need to fit into provided SCLP buffer */
+ if (len > avail) {
+ return 1;
+ }
+
+ ebcdic_put(buf, (char *)&cons->buf, len);
+ *size = len;
+ cons->length = 0;
+ /* data provided and no more data pending */
+ event->event_pending = false;
+ return 0;
+}
+
+static int read_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr,
+ int *slen)
+{
+ int avail, rc;
+ size_t src_len;
+ uint8_t *to;
+ OprtnsCommand *oc = (OprtnsCommand *) evt_buf_hdr;
+
+ if (!event->event_pending) {
+ /* no data pending */
+ return 0;
+ }
+
+ to = (uint8_t *)&oc->data;
+ avail = *slen - sizeof(OprtnsCommand);
+ rc = get_console_data(event, to, &src_len, avail);
+ if (rc) {
+ /* data didn't fit, try next SCCB */
+ return 1;
+ }
+
+ oc->message_unit.mdmsu.gds_id = GDS_ID_MDSMU;
+ oc->message_unit.mdmsu.length = cpu_to_be16(sizeof(struct MDMSU));
+
+ oc->message_unit.cpmsu.gds_id = GDS_ID_CPMSU;
+ oc->message_unit.cpmsu.length =
+ cpu_to_be16(sizeof(struct MDMSU) - sizeof(GdsVector));
+
+ oc->message_unit.text_command.gds_id = GDS_ID_TEXTCMD;
+ oc->message_unit.text_command.length =
+ cpu_to_be16(sizeof(struct MDMSU) - (2 * sizeof(GdsVector)));
+
+ oc->message_unit.self_def_text_message.key = GDS_KEY_SELFDEFTEXTMSG;
+ oc->message_unit.self_def_text_message.length =
+ cpu_to_be16(sizeof(struct MDMSU) - (3 * sizeof(GdsVector)));
+
+ oc->message_unit.text_message.key = GDS_KEY_TEXTMSG;
+ oc->message_unit.text_message.length =
+ cpu_to_be16(sizeof(GdsSubvector) + src_len);
+
+ oc->header.length = cpu_to_be16(sizeof(OprtnsCommand) + src_len);
+ oc->header.type = SCLP_EVENT_OPRTNS_COMMAND;
+ *slen = avail - src_len;
+
+ return 1;
+}
+
+/*
+ * Triggered by SCLP's write_event_data
+ * - write console data to character layer
+ * returns < 0 if an error occurred
+ */
+static int write_console_data(SCLPEvent *event, const uint8_t *buf, int len)
+{
+ int ret = 0;
+ const uint8_t *buf_offset;
+
+ SCLPConsoleLM *scon = DO_UPCAST(SCLPConsoleLM, event, event);
+
+ if (!scon->chr) {
+ /* If there's no backend, we can just say we consumed all data. */
+ return len;
+ }
+
+ buf_offset = buf;
+ while (len > 0) {
+ ret = qemu_chr_fe_write(scon->chr, buf, len);
+ if (ret == 0) {
+ /* a pty doesn't seem to be connected - no error */
+ len = 0;
+ } else if (ret == -EAGAIN || (ret > 0 && ret < len)) {
+ len -= ret;
+ buf_offset += ret;
+ } else {
+ len = 0;
+ }
+ }
+
+ return ret;
+}
+
+static int process_mdb(SCLPEvent *event, MDBO *mdbo)
+{
+ int rc;
+ int len;
+ uint8_t buffer[SIZE_BUFFER];
+
+ len = be16_to_cpu(mdbo->length);
+ len -= sizeof(mdbo->length) + sizeof(mdbo->type)
+ + sizeof(mdbo->mto.line_type_flags)
+ + sizeof(mdbo->mto.alarm_control)
+ + sizeof(mdbo->mto._reserved);
+
+ assert(len <= SIZE_BUFFER);
+
+ /* convert EBCDIC SCLP contents to ASCII console message */
+ ascii_put(buffer, mdbo->mto.message, len);
+ rc = write_console_data(event, (uint8_t *)NEWLINE, 1);
+ if (rc < 0) {
+ return rc;
+ }
+ return write_console_data(event, buffer, len);
+}
+
+static int write_event_data(SCLPEvent *event, EventBufferHeader *ebh)
+{
+ int len;
+ int written;
+ int errors = 0;
+ MDBO *mdbo;
+ SclpMsg *data = (SclpMsg *) ebh;
+ SCLPConsoleLM *scon = DO_UPCAST(SCLPConsoleLM, event, event);
+
+ len = be16_to_cpu(data->mdb.header.length);
+ if (len < sizeof(data->mdb.header)) {
+ return SCLP_RC_INCONSISTENT_LENGTHS;
+ }
+ len -= sizeof(data->mdb.header);
+
+ /* first check message buffers */
+ mdbo = data->mdb.mdbo;
+ while (len > 0) {
+ if (be16_to_cpu(mdbo->length) > len
+ || be16_to_cpu(mdbo->length) == 0) {
+ return SCLP_RC_INCONSISTENT_LENGTHS;
+ }
+ len -= be16_to_cpu(mdbo->length);
+ mdbo = (void *) mdbo + be16_to_cpu(mdbo->length);
+ }
+
+ /* then execute */
+ len = be16_to_cpu(data->mdb.header.length) - sizeof(data->mdb.header);
+ mdbo = data->mdb.mdbo;
+ while (len > 0) {
+ switch (be16_to_cpu(mdbo->type)) {
+ case MESSAGE_TEXT:
+ /* message text object */
+ written = process_mdb(event, mdbo);
+ if (written < 0) {
+ /* character layer error */
+ errors++;
+ }
+ break;
+ default: /* ignore */
+ break;
+ }
+ len -= be16_to_cpu(mdbo->length);
+ mdbo = (void *) mdbo + be16_to_cpu(mdbo->length);
+ }
+ if (errors) {
+ scon->write_errors += errors;
+ }
+ data->header.flags = SCLP_EVENT_BUFFER_ACCEPTED;
+
+ return SCLP_RC_NORMAL_COMPLETION;
+}
+
+static void trigger_console_data(void *opaque, int n, int level)
+{
+ sclp_service_interrupt(0);
+}
+
+/* functions for live migration */
+
+static const VMStateDescription vmstate_sclplmconsole = {
+ .name = "sclplmconsole",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .minimum_version_id_old = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_BOOL(event.event_pending, SCLPConsoleLM),
+ VMSTATE_UINT32(write_errors, SCLPConsoleLM),
+ VMSTATE_UINT32(length, SCLPConsoleLM),
+ VMSTATE_UINT8_ARRAY(buf, SCLPConsoleLM, SIZE_CONSOLE_BUFFER),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+/* qemu object creation and initialization functions */
+
+/* tell character layer our call-back functions */
+
+static int console_init(SCLPEvent *event)
+{
+ static bool console_available;
+
+ SCLPConsoleLM *scon = DO_UPCAST(SCLPConsoleLM, event, event);
+
+ if (console_available) {
+ error_report("Multiple line-mode operator consoles are not supported");
+ return -1;
+ }
+ console_available = true;
+
+ if (scon->chr) {
+ qemu_chr_add_handlers(scon->chr, chr_can_read, chr_read, NULL, scon);
+ }
+ scon->irq_console_read = *qemu_allocate_irqs(trigger_console_data, NULL, 1);
+
+ return 0;
+}
+
+static int console_exit(SCLPEvent *event)
+{
+ return 0;
+}
+
+static void console_reset(DeviceState *dev)
+{
+ SCLPEvent *event = SCLP_EVENT(dev);
+ SCLPConsoleLM *scon = DO_UPCAST(SCLPConsoleLM, event, event);
+
+ event->event_pending = false;
+ scon->length = 0;
+ scon->write_errors = 0;
+}
+
+static Property console_properties[] = {
+ DEFINE_PROP_CHR("chardev", SCLPConsoleLM, chr),
+ DEFINE_PROP_UINT32("write_errors", SCLPConsoleLM, write_errors, 0),
+ DEFINE_PROP_BOOL("echo", SCLPConsoleLM, echo, true),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void console_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SCLPEventClass *ec = SCLP_EVENT_CLASS(klass);
+
+ dc->props = console_properties;
+ dc->reset = console_reset;
+ dc->vmsd = &vmstate_sclplmconsole;
+ ec->init = console_init;
+ ec->exit = console_exit;
+ ec->get_send_mask = send_mask;
+ ec->get_receive_mask = receive_mask;
+ ec->can_handle_event = can_handle_event;
+ ec->read_event_data = read_event_data;
+ ec->write_event_data = write_event_data;
+}
+
+static const TypeInfo sclp_console_info = {
+ .name = "sclplmconsole",
+ .parent = TYPE_SCLP_EVENT,
+ .instance_size = sizeof(SCLPConsoleLM),
+ .class_init = console_class_init,
+ .class_size = sizeof(SCLPEventClass),
+};
+
+static void register_types(void)
+{
+ type_register_static(&sclp_console_info);
+}
+
+type_init(register_types)
diff --git a/include/hw/s390x/event-facility.h b/include/hw/s390x/event-facility.h
index c0f5d196f5..7ce7079f9f 100644
--- a/include/hw/s390x/event-facility.h
+++ b/include/hw/s390x/event-facility.h
@@ -19,12 +19,18 @@
#include "qemu/thread.h"
/* SCLP event types */
+#define SCLP_EVENT_OPRTNS_COMMAND 0x01
+#define SCLP_EVENT_MESSAGE 0x02
+#define SCLP_EVENT_PMSGCMD 0x09
#define SCLP_EVENT_ASCII_CONSOLE_DATA 0x1a
#define SCLP_EVENT_SIGNAL_QUIESCE 0x1d
/* SCLP event masks */
#define SCLP_EVENT_MASK_SIGNAL_QUIESCE 0x00000008
#define SCLP_EVENT_MASK_MSG_ASCII 0x00000040
+#define SCLP_EVENT_MASK_OP_CMD 0x80000000
+#define SCLP_EVENT_MASK_MSG 0x40000000
+#define SCLP_EVENT_MASK_PMSGCMD 0x00800000
#define SCLP_UNCONDITIONAL_READ 0x00
#define SCLP_SELECTIVE_READ 0x01
@@ -54,6 +60,80 @@ typedef struct EventBufferHeader {
uint16_t _reserved;
} QEMU_PACKED EventBufferHeader;
+typedef struct MdbHeader {
+ uint16_t length;
+ uint16_t type;
+ uint32_t tag;
+ uint32_t revision_code;
+} QEMU_PACKED MdbHeader;
+
+typedef struct MTO {
+ uint16_t line_type_flags;
+ uint8_t alarm_control;
+ uint8_t _reserved[3];
+ char message[];
+} QEMU_PACKED MTO;
+
+typedef struct GO {
+ uint32_t domid;
+ uint8_t hhmmss_time[8];
+ uint8_t th_time[3];
+ uint8_t _reserved_0;
+ uint8_t dddyyyy_date[7];
+ uint8_t _reserved_1;
+ uint16_t general_msg_flags;
+ uint8_t _reserved_2[10];
+ uint8_t originating_system_name[8];
+ uint8_t job_guest_name[8];
+} QEMU_PACKED GO;
+
+#define MESSAGE_TEXT 0x0004
+
+typedef struct MDBO {
+ uint16_t length;
+ uint16_t type;
+ union {
+ GO go;
+ MTO mto;
+ };
+} QEMU_PACKED MDBO;
+
+typedef struct MDB {
+ MdbHeader header;
+ MDBO mdbo[0];
+} QEMU_PACKED MDB;
+
+typedef struct SclpMsg {
+ EventBufferHeader header;
+ MDB mdb;
+} QEMU_PACKED SclpMsg;
+
+#define GDS_ID_MDSMU 0x1310
+#define GDS_ID_CPMSU 0x1212
+#define GDS_ID_TEXTCMD 0x1320
+
+typedef struct GdsVector {
+ uint16_t length;
+ uint16_t gds_id;
+} QEMU_PACKED GdsVector;
+
+#define GDS_KEY_SELFDEFTEXTMSG 0x31
+#define GDS_KEY_TEXTMSG 0x30
+
+typedef struct GdsSubvector {
+ uint8_t length;
+ uint8_t key;
+} QEMU_PACKED GdsSubvector;
+
+/* MDS Message Unit */
+typedef struct MDMSU {
+ GdsVector mdmsu;
+ GdsVector cpmsu;
+ GdsVector text_command;
+ GdsSubvector self_def_text_message;
+ GdsSubvector text_message;
+} QEMU_PACKED MDMSU;
+
typedef struct WriteEventData {
SCCBHeader h;
EventBufferHeader ebh;
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-27 07:12:46 +0000