6950c75f40
so that simultaneous access cannot happen. Protect scratch area using the enumeration lock. Also reduce stack usage in usbd_transfer_setup() by moving some big stack members to the scratch area. This saves around 200 bytes of stack. - Fix a whitespace. MFC after: 1 week
119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
/* $FreeBSD$ */
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/*-
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* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _USB_BUS_H_
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#define _USB_BUS_H_
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/*
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* The following structure defines the USB explore message sent to the USB
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* explore process.
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*/
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struct usb_bus_msg {
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struct usb_proc_msg hdr;
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struct usb_bus *bus;
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};
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/*
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* The following structure defines the USB statistics structure.
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*/
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struct usb_bus_stat {
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uint32_t uds_requests[4];
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};
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/*
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* The following structure defines an USB BUS. There is one USB BUS
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* for every Host or Device controller.
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*/
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struct usb_bus {
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struct usb_bus_stat stats_err;
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struct usb_bus_stat stats_ok;
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#if USB_HAVE_ROOT_MOUNT_HOLD
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struct root_hold_token *bus_roothold;
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#endif
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#if USB_HAVE_PER_BUS_PROCESS
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#define USB_BUS_GIANT_PROC(bus) (&(bus)->giant_callback_proc)
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#define USB_BUS_NON_GIANT_PROC(bus) (&(bus)->non_giant_callback_proc)
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#define USB_BUS_EXPLORE_PROC(bus) (&(bus)->explore_proc)
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#define USB_BUS_CONTROL_XFER_PROC(bus) (&(bus)->control_xfer_proc)
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/*
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* There are two callback processes. One for Giant locked
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* callbacks. One for non-Giant locked callbacks. This should
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* avoid congestion and reduce response time in most cases.
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*/
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struct usb_process giant_callback_proc;
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struct usb_process non_giant_callback_proc;
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/* Explore process */
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struct usb_process explore_proc;
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/* Control request process */
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struct usb_process control_xfer_proc;
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#endif
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struct usb_bus_msg explore_msg[2];
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struct usb_bus_msg detach_msg[2];
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struct usb_bus_msg attach_msg[2];
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struct usb_bus_msg suspend_msg[2];
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struct usb_bus_msg resume_msg[2];
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struct usb_bus_msg shutdown_msg[2];
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/*
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* This mutex protects the USB hardware:
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*/
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struct mtx bus_mtx;
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struct usb_xfer_queue intr_q;
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struct usb_callout power_wdog; /* power management */
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device_t parent;
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device_t bdev; /* filled by HC driver */
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#if USB_HAVE_BUSDMA
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struct usb_dma_parent_tag dma_parent_tag[1];
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struct usb_dma_tag dma_tags[USB_BUS_DMA_TAG_MAX];
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#endif
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struct usb_bus_methods *methods; /* filled by HC driver */
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struct usb_device **devices;
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struct ifnet *ifp; /* only for USB Packet Filter */
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usb_power_mask_t hw_power_state; /* see USB_HW_POWER_XXX */
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usb_size_t uframe_usage[USB_HS_MICRO_FRAMES_MAX];
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uint16_t isoc_time_last; /* in milliseconds */
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uint8_t alloc_failed; /* Set if memory allocation failed. */
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uint8_t driver_added_refcount; /* Current driver generation count */
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enum usb_revision usbrev; /* USB revision. See "USB_REV_XXX". */
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uint8_t devices_max; /* maximum number of USB devices */
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uint8_t do_probe; /* set if USB should be re-probed */
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uint8_t no_explore; /* don't explore USB ports */
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};
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#endif /* _USB_BUS_H_ */
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