04e1532fc5
More graciously handle processing messages and watch events inline prior to threads being up and running. MFC after: 1 month
158 lines
4.7 KiB
C
158 lines
4.7 KiB
C
/*
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* Private include for xenbus communications.
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*
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* Copyright (C) 2005 Rusty Russell, IBM Corporation
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*
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* This file may be distributed separately from the Linux kernel, or
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* incorporated into other software packages, subject to the following license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this source file (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* $FreeBSD$
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*/
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#ifndef _XENBUS_COMMS_H
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#define _XENBUS_COMMS_H
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int xs_init(void);
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int xb_init_comms(void);
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/* Low level routines. */
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int xb_write(const void *data, unsigned len);
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int xb_read(void *data, unsigned len);
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int xs_input_avail(void);
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extern int xb_waitq;
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extern int xenbus_running;
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#define __wait_event_interruptible(wchan, condition, ret) \
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do { \
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for (;;) { \
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if (xenbus_running == 0) { \
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break; \
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} \
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if (condition) \
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break; \
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if ((ret = !tsleep(wchan, PWAIT | PCATCH, "waitev", hz/10))) \
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break; \
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} \
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} while (0)
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#define wait_event_interruptible(wchan, condition) \
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({ \
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int __ret = 0; \
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if (!(condition)) \
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__wait_event_interruptible(wchan, condition, __ret); \
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__ret; \
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})
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#define DECLARE_MUTEX(lock) struct sema lock
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#define semaphore sema
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#define rw_semaphore sema
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#define down sema_wait
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#define up sema_post
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#define down_read sema_wait
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#define up_read sema_post
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#define down_write sema_wait
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#define up_write sema_post
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/**
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* container_of - cast a member of a structure out to the containing structure
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*
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* @ptr: the pointer to the member.
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* @type: the type of the container struct this is embedded in.
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* @member: the name of the member within the struct.
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*
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*/
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#define container_of(ptr, type, member) ({ \
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__typeof__( ((type *)0)->member ) *__mptr = (ptr); \
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(type *)( (char *)__mptr - offsetof(type,member) );})
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/*
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* XXX
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*
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*/
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#define GFP_KERNEL 1
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#define EXPORT_SYMBOL(x)
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#define kmalloc(size, unused) malloc(size, M_DEVBUF, M_WAITOK)
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#define kfree(ptr) free((void *)(uintptr_t)ptr, M_DEVBUF)
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#define BUG_ON PANIC_IF
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#define semaphore sema
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#define rw_semaphore sema
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#define DEFINE_SPINLOCK(lock) struct mtx lock
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#define DECLARE_MUTEX(lock) struct sema lock
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#define u32 uint32_t
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#define list_del(head, ent) TAILQ_REMOVE(head, ent, list)
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#define simple_strtoul strtoul
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#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
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#define list_empty TAILQ_EMPTY
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#define wake_up wakeup
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#define BUS_ID_SIZE 128
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struct xen_bus_type
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{
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char *root;
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unsigned int levels;
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int (*get_bus_id)(char bus_id[BUS_ID_SIZE], const char *nodename);
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int (*probe)(const char *type, const char *dir);
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struct xendev_list_head *bus;
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int error;
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#if 0
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struct bus_type bus;
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struct device dev;
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#endif
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};
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extern void xenbus_backend_probe_and_watch(void);
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int xenbus_probe_node(struct xen_bus_type *bus, const char *type,
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const char *nodename);
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int xenbus_probe_devices(struct xen_bus_type *bus);
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int xenbus_register_driver_common(struct xenbus_driver *drv,
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struct xen_bus_type *bus);
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void dev_changed(const char *node, struct xen_bus_type *bus);
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int
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read_otherend_details(struct xenbus_device *xendev, char *id_node,
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char *path_node);
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char *kasprintf(const char *fmt, ...);
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#endif /* _XENBUS_COMMS_H */
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/*
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* Local variables:
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* c-file-style: "linux"
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* indent-tabs-mode: t
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* c-indent-level: 8
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* c-basic-offset: 8
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* tab-width: 8
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* End:
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*/
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