source: mainline/uspace/lib/drv/generic/remote_usbdiag.c@ a35b458

/*
 * Copyright (c) 2017 Petr Manek
 * 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 libdrv
 * @{
 */
/** @file
 * USB diagnostic device remote interface.
 */

#include <async.h>
#include <assert.h>
#include <macros.h>
#include <errno.h>
#include <devman.h>

#include "usbdiag_iface.h"

typedef enum {
        IPC_M_USBDIAG_TEST_IN,
        IPC_M_USBDIAG_TEST_OUT,
} usb_iface_funcs_t;

async_sess_t *usbdiag_connect(devman_handle_t handle)
{
        return devman_device_connect(handle, IPC_FLAG_BLOCKING);
}

void usbdiag_disconnect(async_sess_t *sess)
{
        if (sess)
                async_hangup(sess);
}

errno_t usbdiag_test_in(async_exch_t *exch,
    const usbdiag_test_params_t *params, usbdiag_test_results_t *results)
{
        if (!exch)
                return EBADMEM;

        ipc_call_t answer;
        aid_t req = async_send_1(exch, DEV_IFACE_ID(USBDIAG_DEV_IFACE),
            IPC_M_USBDIAG_TEST_IN, &answer);

        errno_t rc = async_data_write_start(exch, params,
            sizeof(usbdiag_test_params_t));
        if (rc != EOK) {
                async_exchange_end(exch);
                async_forget(req);
                return rc;
        }

        rc = async_data_read_start(exch, results,
            sizeof(usbdiag_test_results_t));
        if (rc != EOK) {
                async_exchange_end(exch);
                async_forget(req);
                return rc;
        }

        async_exchange_end(exch);

        errno_t retval;
        async_wait_for(req, &retval);

        return (errno_t) retval;
}

errno_t usbdiag_test_out(async_exch_t *exch,
    const usbdiag_test_params_t *params, usbdiag_test_results_t *results)
{
        if (!exch)
                return EBADMEM;

        ipc_call_t answer;
        aid_t req = async_send_1(exch, DEV_IFACE_ID(USBDIAG_DEV_IFACE),
            IPC_M_USBDIAG_TEST_OUT, &answer);

        errno_t rc = async_data_write_start(exch, params,
            sizeof(usbdiag_test_params_t));
        if (rc != EOK) {
                async_exchange_end(exch);
                async_forget(req);
                return rc;
        }

        rc = async_data_read_start(exch, results,
            sizeof(usbdiag_test_results_t));
        if (rc != EOK) {
                async_exchange_end(exch);
                async_forget(req);
                return rc;
        }

        async_exchange_end(exch);

        errno_t retval;
        async_wait_for(req, &retval);

        return (errno_t) retval;
}

static void remote_usbdiag_test_in(ddf_fun_t *, void *,
    ipc_callid_t, ipc_call_t *);
static void remote_usbdiag_test_out(ddf_fun_t *, void *,
    ipc_callid_t, ipc_call_t *);

/** Remote USB diagnostic interface operations. */
static const remote_iface_func_ptr_t remote_usbdiag_iface_ops [] = {
        [IPC_M_USBDIAG_TEST_IN] = remote_usbdiag_test_in,
        [IPC_M_USBDIAG_TEST_OUT] = remote_usbdiag_test_out
};

/** Remote USB diagnostic interface structure. */
const remote_iface_t remote_usbdiag_iface = {
        .method_count = ARRAY_SIZE(remote_usbdiag_iface_ops),
        .methods = remote_usbdiag_iface_ops,
};

void remote_usbdiag_test_in(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        const usbdiag_iface_t *diag_iface = (usbdiag_iface_t *) iface;

        size_t size;
        ipc_callid_t data_callid;
        if (!async_data_write_receive(&data_callid, &size)) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }

        if (size != sizeof(usbdiag_test_params_t)) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }

        usbdiag_test_params_t params;
        if (async_data_write_finalize(data_callid, &params, size) != EOK) {
                async_answer_0(callid, EINVAL);
                return;
        }

        usbdiag_test_results_t results;
        const errno_t ret = !diag_iface->test_in ? ENOTSUP
            : diag_iface->test_in(fun, &params, &results);

        if (ret != EOK) {
                async_answer_0(callid, ret);
                return;
        }

        if (!async_data_read_receive(&data_callid, &size)) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }

        if (size != sizeof(usbdiag_test_results_t)) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }

        if (async_data_read_finalize(data_callid, &results, size) != EOK) {
                async_answer_0(callid, EINVAL);
                return;
        }

        async_answer_0(callid, ret);
}

void remote_usbdiag_test_out(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        const usbdiag_iface_t *diag_iface = (usbdiag_iface_t *) iface;

        size_t size;
        ipc_callid_t data_callid;
        if (!async_data_write_receive(&data_callid, &size)) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }

        if (size != sizeof(usbdiag_test_params_t)) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }

        usbdiag_test_params_t params;
        if (async_data_write_finalize(data_callid, &params, size) != EOK) {
                async_answer_0(callid, EINVAL);
                return;
        }

        usbdiag_test_results_t results;
        const errno_t ret = !diag_iface->test_out ? ENOTSUP
            : diag_iface->test_out(fun, &params, &results);

        if (ret != EOK) {
                async_answer_0(callid, ret);
                return;
        }

        if (!async_data_read_receive(&data_callid, &size)) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }

        if (size != sizeof(usbdiag_test_results_t)) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }

        if (async_data_read_finalize(data_callid, &results, size) != EOK) {
                async_answer_0(callid, EINVAL);
                return;
        }

        async_answer_0(callid, ret);
}

/**
 * @}
 */