source: mainline/uspace/lib/console/src/con_srv.c@ a635535

/*
 * Copyright (c) 2021 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libconsole
 * @{
 */
/**
 * @file
 * @brief Console protocol server stub
 */
#include <as.h>
#include <errno.h>
#include <io/cons_event.h>
#include <ipc/console.h>
#include <stdlib.h>
#include <stddef.h>

#include <io/con_srv.h>

static errno_t console_ev_encode(cons_event_t *event, ipc_call_t *icall)
{
        ipc_set_arg1(icall, event->type);

        switch (event->type) {
        case CEV_KEY:
                ipc_set_arg2(icall, event->ev.key.type);
                ipc_set_arg3(icall, event->ev.key.key);
                ipc_set_arg4(icall, event->ev.key.mods);
                ipc_set_arg5(icall, event->ev.key.c);
                break;
        case CEV_POS:
                ipc_set_arg2(icall, (event->ev.pos.pos_id << 16) | (event->ev.pos.type & 0xffff));
                ipc_set_arg3(icall, event->ev.pos.btn_num);
                ipc_set_arg4(icall, event->ev.pos.hpos);
                ipc_set_arg5(icall, event->ev.pos.vpos);
                break;
        default:
                return EIO;
        }

        return EOK;
}

static void con_read_srv(con_srv_t *srv, ipc_call_t *icall)
{
        void *buf;
        size_t size;
        errno_t rc;

        ipc_call_t call;
        if (!async_data_read_receive(&call, &size)) {
                async_answer_0(icall, EINVAL);
                return;
        }

        buf = malloc(size);
        if (buf == NULL) {
                async_answer_0(&call, ENOMEM);
                async_answer_0(icall, ENOMEM);
                return;
        }

        if (srv->srvs->ops->read == NULL) {
                async_answer_0(&call, ENOTSUP);
                async_answer_0(icall, ENOTSUP);
                free(buf);
                return;
        }

        size_t nread;
        rc = srv->srvs->ops->read(srv, buf, size, &nread);
        if (rc != EOK) {
                async_answer_0(&call, rc);
                async_answer_0(icall, rc);
                free(buf);
                return;
        }

        async_data_read_finalize(&call, buf, nread);
        free(buf);

        async_answer_1(icall, EOK, nread);
}

static void con_write_srv(con_srv_t *srv, ipc_call_t *icall)
{
        void *data;
        size_t size;
        errno_t rc;

        rc = async_data_write_accept(&data, false, 0, 0, 0, &size);
        if (rc != EOK) {
                async_answer_0(icall, rc);
                return;
        }

        if (srv->srvs->ops->write == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        size_t nwritten = 0;
        rc = srv->srvs->ops->write(srv, data, size, &nwritten);
        free(data);

        async_answer_1(icall, rc, nwritten);
}

static void con_sync_srv(con_srv_t *srv, ipc_call_t *icall)
{
        if (srv->srvs->ops->sync == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        srv->srvs->ops->sync(srv);
        async_answer_0(icall, EOK);
}

static void con_clear_srv(con_srv_t *srv, ipc_call_t *icall)
{
        if (srv->srvs->ops->clear == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        srv->srvs->ops->clear(srv);
        async_answer_0(icall, EOK);
}

static void con_set_pos_srv(con_srv_t *srv, ipc_call_t *icall)
{
        sysarg_t col;
        sysarg_t row;

        col = ipc_get_arg1(icall);
        row = ipc_get_arg2(icall);

        if (srv->srvs->ops->set_pos == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        srv->srvs->ops->set_pos(srv, col, row);
        async_answer_0(icall, EOK);
}

static void con_get_pos_srv(con_srv_t *srv, ipc_call_t *icall)
{
        errno_t rc;
        sysarg_t col;
        sysarg_t row;

        if (srv->srvs->ops->get_pos == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        rc = srv->srvs->ops->get_pos(srv, &col, &row);
        async_answer_2(icall, rc, col, row);
}

static void con_get_size_srv(con_srv_t *srv, ipc_call_t *icall)
{
        errno_t rc;
        sysarg_t cols;
        sysarg_t rows;

        if (srv->srvs->ops->get_size == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        rc = srv->srvs->ops->get_size(srv, &cols, &rows);
        async_answer_2(icall, rc, cols, rows);
}

static void con_get_color_cap_srv(con_srv_t *srv, ipc_call_t *icall)
{
        errno_t rc;
        console_caps_t ccap;

        if (srv->srvs->ops->get_color_cap == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        rc = srv->srvs->ops->get_color_cap(srv, &ccap);
        async_answer_1(icall, rc, (sysarg_t)ccap);
}

static void con_set_style_srv(con_srv_t *srv, ipc_call_t *icall)
{
        console_style_t style;

        style = ipc_get_arg1(icall);

        if (srv->srvs->ops->set_style == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        srv->srvs->ops->set_style(srv, style);
        async_answer_0(icall, EOK);
}

static void con_set_color_srv(con_srv_t *srv, ipc_call_t *icall)
{
        console_color_t bgcolor;
        console_color_t fgcolor;
        console_color_attr_t flags;

        bgcolor = ipc_get_arg1(icall);
        fgcolor = ipc_get_arg2(icall);
        flags = ipc_get_arg3(icall);

        if (srv->srvs->ops->set_color == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        srv->srvs->ops->set_color(srv, bgcolor, fgcolor, flags);
        async_answer_0(icall, EOK);
}

static void con_set_rgb_color_srv(con_srv_t *srv, ipc_call_t *icall)
{
        pixel_t bgcolor;
        pixel_t fgcolor;

        bgcolor = ipc_get_arg1(icall);
        fgcolor = ipc_get_arg2(icall);

        if (srv->srvs->ops->set_rgb_color == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        srv->srvs->ops->set_rgb_color(srv, bgcolor, fgcolor);
        async_answer_0(icall, EOK);
}

static void con_set_cursor_visibility_srv(con_srv_t *srv, ipc_call_t *icall)
{
        bool show;

        show = ipc_get_arg1(icall);

        if (srv->srvs->ops->set_cursor_visibility == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        srv->srvs->ops->set_cursor_visibility(srv, show);
        async_answer_0(icall, EOK);
}

static void con_set_caption_srv(con_srv_t *srv, ipc_call_t *icall)
{
        char *caption;
        errno_t rc;

        rc = async_data_write_accept((void **) &caption, true, 0,
            CON_CAPTION_MAXLEN, 0, NULL);
        if (rc != EOK) {
                async_answer_0(icall, rc);
                return;
        }

        if (srv->srvs->ops->set_caption == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        srv->srvs->ops->set_caption(srv, caption);
        free(caption);
        async_answer_0(icall, EOK);
}

static void con_get_event_srv(con_srv_t *srv, ipc_call_t *icall)
{
        errno_t rc;
        cons_event_t event;
        ipc_call_t result;

        if (srv->srvs->ops->get_event == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        rc = srv->srvs->ops->get_event(srv, &event);
        if (rc != EOK) {
                async_answer_0(icall, rc);
                return;
        }

        rc = console_ev_encode(&event, &result);
        if (rc != EOK) {
                async_answer_0(icall, rc);
                return;
        }

        async_answer_5(icall, rc, ipc_get_arg1(&result), ipc_get_arg2(&result),
            ipc_get_arg3(&result), ipc_get_arg4(&result), ipc_get_arg5(&result));
}

/** Create shared buffer for efficient rendering */
static void con_map_srv(con_srv_t *srv, ipc_call_t *icall)
{
        errno_t rc;
        charfield_t *buf;
        sysarg_t cols, rows;
        ipc_call_t call;
        size_t size;

        if (srv->srvs->ops->map == NULL || srv->srvs->ops->unmap == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        cols = ipc_get_arg1(icall);
        rows = ipc_get_arg2(icall);

        if (!async_share_in_receive(&call, &size)) {
                async_answer_0(icall, EINVAL);
                return;
        }

        /* Check size */
        if (size != PAGES2SIZE(SIZE2PAGES(cols * rows * sizeof(charfield_t)))) {
                async_answer_0(&call, EINVAL);
                async_answer_0(icall, EINVAL);
                return;
        }

        rc = srv->srvs->ops->map(srv, cols, rows, &buf);
        if (rc != EOK) {
                async_answer_0(&call, rc);
                async_answer_0(icall, rc);
                return;
        }

        rc = async_share_in_finalize(&call, buf, AS_AREA_READ |
            AS_AREA_WRITE | AS_AREA_CACHEABLE);
        if (rc != EOK) {
                srv->srvs->ops->unmap(srv);
                async_answer_0(icall, EIO);
                return;
        }

        async_answer_0(icall, EOK);
}

/** Delete shared buffer */
static void con_unmap_srv(con_srv_t *srv, ipc_call_t *icall)
{
        if (srv->srvs->ops->unmap == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        srv->srvs->ops->unmap(srv);
        async_answer_0(icall, EOK);
}

/** Update console area from shared buffer */
static void con_update_srv(con_srv_t *srv, ipc_call_t *icall)
{
        sysarg_t c0, r0, c1, r1;

        c0 = ipc_get_arg1(icall);
        r0 = ipc_get_arg2(icall);
        c1 = ipc_get_arg3(icall);
        r1 = ipc_get_arg4(icall);

        if (srv->srvs->ops->update == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        srv->srvs->ops->update(srv, c0, r0, c1, r1);
        async_answer_0(icall, EOK);
}

static con_srv_t *con_srv_create(con_srvs_t *srvs)
{
        con_srv_t *srv;

        srv = calloc(1, sizeof(*srv));
        if (srv == NULL)
                return NULL;

        srv->srvs = srvs;
        return srv;
}

void con_srvs_init(con_srvs_t *srvs)
{
        srvs->ops = NULL;
        srvs->sarg = NULL;
        srvs->abort_timeout = 0;
        srvs->aborted = false;
}

errno_t con_conn(ipc_call_t *icall, con_srvs_t *srvs)
{
        con_srv_t *srv;
        errno_t rc;

        /* Accept the connection */
        async_accept_0(icall);

        srv = con_srv_create(srvs);
        if (srv == NULL)
                return ENOMEM;

        srv->client_sess = NULL;

        rc = srvs->ops->open(srvs, srv);
        if (rc != EOK)
                return rc;

        while (true) {
                ipc_call_t call;
                bool received = false;

                while (!received) {
                        /* XXX Need to be able to abort immediately */
                        received = async_get_call_timeout(&call,
                            srvs->abort_timeout);

                        if (srv->srvs->aborted) {
                                if (received)
                                        async_answer_0(&call, EINTR);
                                break;
                        }
                }

                if (!received)
                        break;

                sysarg_t method = ipc_get_imethod(&call);

                if (!method) {
                        /* The other side has hung up */
                        async_answer_0(&call, EOK);
                        break;
                }

                switch (method) {
                case VFS_OUT_READ:
                        con_read_srv(srv, &call);
                        break;
                case VFS_OUT_WRITE:
                        con_write_srv(srv, &call);
                        break;
                case VFS_OUT_SYNC:
                        con_sync_srv(srv, &call);
                        break;
                case CONSOLE_CLEAR:
                        con_clear_srv(srv, &call);
                        break;
                case CONSOLE_SET_POS:
                        con_set_pos_srv(srv, &call);
                        break;
                case CONSOLE_GET_POS:
                        con_get_pos_srv(srv, &call);
                        break;
                case CONSOLE_GET_SIZE:
                        con_get_size_srv(srv, &call);
                        break;
                case CONSOLE_GET_COLOR_CAP:
                        con_get_color_cap_srv(srv, &call);
                        break;
                case CONSOLE_SET_STYLE:
                        con_set_style_srv(srv, &call);
                        break;
                case CONSOLE_SET_COLOR:
                        con_set_color_srv(srv, &call);
                        break;
                case CONSOLE_SET_RGB_COLOR:
                        con_set_rgb_color_srv(srv, &call);
                        break;
                case CONSOLE_SET_CURSOR_VISIBILITY:
                        con_set_cursor_visibility_srv(srv, &call);
                        break;
                case CONSOLE_SET_CAPTION:
                        con_set_caption_srv(srv, &call);
                        break;
                case CONSOLE_GET_EVENT:
                        con_get_event_srv(srv, &call);
                        break;
                case CONSOLE_MAP:
                        con_map_srv(srv, &call);
                        break;
                case CONSOLE_UNMAP:
                        con_unmap_srv(srv, &call);
                        break;
                case CONSOLE_UPDATE:
                        con_update_srv(srv, &call);
                        break;
                default:
                        async_answer_0(&call, ENOTSUP);
                }
        }

        rc = srvs->ops->close(srv);
        free(srv);

        return rc;
}

/** @}
 */