HelenOS sources

root/uspace/drv/bus/usb/xhci/streams.h

INCLUDED FROM

/*
 * Copyright (c) 2017 Michal Staruch
 * 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 drvusbxhci
 * @{
 */
/** @file
 * @brief Structures and functions for Superspeed bulk streams.
 */

#ifndef XHCI_STREAMS_H
#define XHCI_STREAMS_H

#include "endpoint.h"
#include "hw_struct/context.h"
#include "trb_ring.h"

typedef struct xhci_endpoint xhci_endpoint_t;
typedef struct xhci_stream_data xhci_stream_data_t;

typedef struct xhci_stream_data {
        /** The TRB ring for the context, if valid */
        xhci_trb_ring_t ring;

        /**
         * Pointer to the array of secondary stream context data for primary
         * data.
         */
        xhci_stream_data_t *secondary_data;

        /** The size of secondary stream context data array */
        uint32_t secondary_size;

        /** Secondary stream context array - allocated for xHC hardware.
         * Required for later dealocation of secondary structure.
         */
        xhci_stream_ctx_t *secondary_stream_ctx_array;
        dma_buffer_t secondary_stream_ctx_dma;
} xhci_stream_data_t;

extern xhci_stream_data_t *xhci_get_stream_ctx_data(xhci_endpoint_t *, uint32_t);
extern void xhci_stream_free_ds(xhci_endpoint_t *);

extern errno_t xhci_endpoint_remove_streams(xhci_hc_t *, xhci_device_t *,
    xhci_endpoint_t *);
extern errno_t xhci_endpoint_request_primary_streams(xhci_hc_t *,
    xhci_device_t *, xhci_endpoint_t *, unsigned);
extern errno_t xhci_endpoint_request_secondary_streams(xhci_hc_t *,
    xhci_device_t *, xhci_endpoint_t *, unsigned *, unsigned);

#endif