71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* xHCI host controller sideband support
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*
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* Copyright (c) 2023, Intel Corporation.
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*
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* Author: Mathias Nyman <mathias.nyman@linux.intel.com>
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*/
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#ifndef __LINUX_XHCI_SIDEBAND_H
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#define __LINUX_XHCI_SIDEBAND_H
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#include <linux/scatterlist.h>
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#include <linux/usb.h>
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#define EP_CTX_PER_DEV 31 /* FIMXME defined twice, from xhci.h */
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struct xhci_sideband;
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/**
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* struct xhci_sideband - representation of a sideband accessed usb device.
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* @xhci: The xhci host controller the usb device is connected to
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* @vdev: the usb device accessed via sideband
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* @eps: array of endpoints controlled via sideband
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* @ir: event handling and buffer for sideband accessed device
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*
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* FIXME usb device accessed via sideband Keeping track of sideband accessed usb devices.
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*/
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struct xhci_sideband {
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struct xhci_hcd *xhci;
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struct xhci_virt_device *vdev;
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struct xhci_virt_ep *eps[EP_CTX_PER_DEV];
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struct xhci_interrupter *ir;
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struct mutex mutex;
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};
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struct xhci_sideband *
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xhci_sideband_register(struct usb_device *udev);
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void
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xhci_sideband_unregister(struct xhci_sideband *sb);
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int
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xhci_sideband_add_endpoint(struct xhci_sideband *sb,
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struct usb_host_endpoint *host_ep);
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int
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xhci_sideband_remove_endpoint(struct xhci_sideband *sb,
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struct usb_host_endpoint *host_ep);
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int
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xhci_sideband_stop_endpoint(struct xhci_sideband *sb,
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struct usb_host_endpoint *host_ep);
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struct sg_table *
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xhci_sideband_get_endpoint_buffer(struct xhci_sideband *sb,
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struct usb_host_endpoint *host_ep);
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struct sg_table *
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xhci_sideband_get_event_buffer(struct xhci_sideband *sb);
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int xhci_sideband_enable_interrupt(struct xhci_sideband *sb, u32 imod_interval);
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int
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xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg,
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int intr_num, bool ip_autoclear);
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void
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xhci_sideband_remove_interrupter(struct xhci_sideband *sb);
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int
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xhci_sideband_interrupter_id(struct xhci_sideband *sb);
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#endif /* __LINUX_XHCI_SIDEBAND_H */
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