244 lines
6.4 KiB
C
244 lines
6.4 KiB
C
/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu/main-loop.h"
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#include "qemu/module.h"
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#include "qapi/error.h"
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#include "chardev/char-win.h"
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static void win_chr_read(Chardev *chr, DWORD len)
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{
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WinChardev *s = WIN_CHARDEV(chr);
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int max_size = qemu_chr_be_can_write(chr);
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int ret, err;
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uint8_t buf[CHR_READ_BUF_LEN];
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DWORD size;
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if (len > max_size) {
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len = max_size;
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}
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if (len == 0) {
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return;
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}
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ZeroMemory(&s->orecv, sizeof(s->orecv));
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s->orecv.hEvent = s->hrecv;
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ret = ReadFile(s->file, buf, len, &size, &s->orecv);
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if (!ret) {
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err = GetLastError();
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if (err == ERROR_IO_PENDING) {
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ret = GetOverlappedResult(s->file, &s->orecv, &size, TRUE);
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}
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}
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if (size > 0) {
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qemu_chr_be_write(chr, buf, size);
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}
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}
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static int win_chr_serial_poll(void *opaque)
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{
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Chardev *chr = CHARDEV(opaque);
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WinChardev *s = WIN_CHARDEV(opaque);
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COMSTAT status;
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DWORD comerr;
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ClearCommError(s->file, &comerr, &status);
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if (status.cbInQue > 0) {
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win_chr_read(chr, status.cbInQue);
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return 1;
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}
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return 0;
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}
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int win_chr_serial_init(Chardev *chr, const char *filename, Error **errp)
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{
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WinChardev *s = WIN_CHARDEV(chr);
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COMMCONFIG comcfg;
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COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
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COMSTAT comstat;
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DWORD size;
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DWORD err;
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s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
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if (!s->hsend) {
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error_setg(errp, "Failed CreateEvent");
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goto fail;
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}
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s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
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if (!s->hrecv) {
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error_setg(errp, "Failed CreateEvent");
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goto fail;
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}
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s->file = CreateFile(filename, GENERIC_READ | GENERIC_WRITE, 0, NULL,
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OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
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if (s->file == INVALID_HANDLE_VALUE) {
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error_setg_win32(errp, GetLastError(), "Failed CreateFile");
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s->file = NULL;
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goto fail;
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}
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if (!SetupComm(s->file, NRECVBUF, NSENDBUF)) {
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error_setg(errp, "Failed SetupComm");
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goto fail;
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}
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ZeroMemory(&comcfg, sizeof(COMMCONFIG));
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size = sizeof(COMMCONFIG);
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GetDefaultCommConfig(filename, &comcfg, &size);
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comcfg.dcb.DCBlength = sizeof(DCB);
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CommConfigDialog(filename, NULL, &comcfg);
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if (!SetCommState(s->file, &comcfg.dcb)) {
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error_setg(errp, "Failed SetCommState");
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goto fail;
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}
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if (!SetCommMask(s->file, EV_ERR)) {
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error_setg(errp, "Failed SetCommMask");
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goto fail;
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}
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cto.ReadIntervalTimeout = MAXDWORD;
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if (!SetCommTimeouts(s->file, &cto)) {
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error_setg(errp, "Failed SetCommTimeouts");
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goto fail;
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}
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if (!ClearCommError(s->file, &err, &comstat)) {
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error_setg(errp, "Failed ClearCommError");
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goto fail;
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}
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qemu_add_polling_cb(win_chr_serial_poll, chr);
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return 0;
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fail:
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return -1;
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}
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int win_chr_pipe_poll(void *opaque)
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{
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Chardev *chr = CHARDEV(opaque);
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WinChardev *s = WIN_CHARDEV(opaque);
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DWORD size;
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PeekNamedPipe(s->file, NULL, 0, NULL, &size, NULL);
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if (size > 0) {
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win_chr_read(chr, size);
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return 1;
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}
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return 0;
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}
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/* Called with chr_write_lock held. */
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static int win_chr_write(Chardev *chr, const uint8_t *buf, int len1)
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{
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WinChardev *s = WIN_CHARDEV(chr);
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DWORD len, ret, size, err;
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len = len1;
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ZeroMemory(&s->osend, sizeof(s->osend));
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s->osend.hEvent = s->hsend;
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while (len > 0) {
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if (s->hsend) {
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ret = WriteFile(s->file, buf, len, &size, &s->osend);
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} else {
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ret = WriteFile(s->file, buf, len, &size, NULL);
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}
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if (!ret) {
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err = GetLastError();
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if (err == ERROR_IO_PENDING) {
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ret = GetOverlappedResult(s->file, &s->osend, &size, TRUE);
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if (ret) {
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buf += size;
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len -= size;
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} else {
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break;
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}
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} else {
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break;
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}
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} else {
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buf += size;
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len -= size;
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}
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}
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return len1 - len;
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}
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static void char_win_finalize(Object *obj)
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{
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Chardev *chr = CHARDEV(obj);
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WinChardev *s = WIN_CHARDEV(chr);
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if (s->hsend) {
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CloseHandle(s->hsend);
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}
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if (s->hrecv) {
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CloseHandle(s->hrecv);
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}
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if (!s->keep_open && s->file) {
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CloseHandle(s->file);
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}
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if (s->fpipe) {
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qemu_del_polling_cb(win_chr_pipe_poll, chr);
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} else {
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qemu_del_polling_cb(win_chr_serial_poll, chr);
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}
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qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
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}
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void win_chr_set_file(Chardev *chr, HANDLE file, bool keep_open)
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{
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WinChardev *s = WIN_CHARDEV(chr);
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s->keep_open = keep_open;
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s->file = file;
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}
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static void char_win_class_init(ObjectClass *oc, void *data)
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{
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ChardevClass *cc = CHARDEV_CLASS(oc);
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cc->chr_write = win_chr_write;
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}
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static const TypeInfo char_win_type_info = {
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.name = TYPE_CHARDEV_WIN,
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.parent = TYPE_CHARDEV,
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.instance_size = sizeof(WinChardev),
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.instance_finalize = char_win_finalize,
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.class_init = char_win_class_init,
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.abstract = true,
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};
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static void register_types(void)
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{
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type_register_static(&char_win_type_info);
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}
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type_init(register_types);
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