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xen_shm.h revision 1.3.4.2 
      1  1.3.4.2    yamt /*      $NetBSD: xen_shm.h,v 1.3.4.2 2006/12/30 20:47:25 yamt Exp $      */
      2      1.2  bouyer 
      3      1.2  bouyer /*
      4      1.2  bouyer  * Copyright (c) 2005 Manuel Bouyer.
      5      1.2  bouyer  *
      6      1.2  bouyer  * Redistribution and use in source and binary forms, with or without
      7      1.2  bouyer  * modification, are permitted provided that the following conditions
      8      1.2  bouyer  * are met:
      9      1.2  bouyer  * 1. Redistributions of source code must retain the above copyright
     10      1.2  bouyer  *    notice, this list of conditions and the following disclaimer.
     11      1.2  bouyer  * 2. Redistributions in binary form must reproduce the above copyright
     12      1.2  bouyer  *    notice, this list of conditions and the following disclaimer in the
     13      1.2  bouyer  *    documentation and/or other materials provided with the distribution.
     14      1.2  bouyer  * 3. All advertising materials mentioning features or use of this software
     15      1.2  bouyer  *    must display the following acknowledgement:
     16      1.2  bouyer  *      This product includes software developed by Manuel Bouyer.
     17      1.2  bouyer  * 4. The name of the author may not be used to endorse or promote products
     18      1.2  bouyer  *    derived from this software without specific prior written permission.
     19      1.2  bouyer  *
     20      1.2  bouyer  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21      1.2  bouyer  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22      1.2  bouyer  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23      1.2  bouyer  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24      1.2  bouyer  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25      1.2  bouyer  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26      1.2  bouyer  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27      1.2  bouyer  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28      1.2  bouyer  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29      1.2  bouyer  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30      1.2  bouyer  *
     31      1.2  bouyer  */
     32      1.2  bouyer 
     33  1.3.4.1    yamt #include "opt_xen.h"
     34  1.3.4.1    yamt #include <machine/param.h>
     35  1.3.4.1    yamt 
     36  1.3.4.1    yamt #define XENSHM_MAX_PAGES_PER_REQUEST (MAXPHYS >> PAGE_SHIFT)
     37  1.3.4.1    yamt 
     38      1.2  bouyer /*
     39      1.2  bouyer  * Helper routines for the backend drivers. This implement the necessary
     40      1.3    yamt  * functions to map a bunch of pages from foreign domains in our kernel VM
     41      1.2  bouyer  * space, do I/O to it, and unmap it.
     42      1.2  bouyer  */
     43      1.2  bouyer 
     44  1.3.4.1    yamt #ifdef XEN3
     45  1.3.4.2    yamt int  xen_shm_map(int, int, grant_ref_t *, vaddr_t *, grant_handle_t *, int);
     46  1.3.4.2    yamt void xen_shm_unmap(vaddr_t, int, grant_handle_t *);
     47  1.3.4.1    yamt #else
     48      1.2  bouyer int  xen_shm_map(paddr_t *, int, int, vaddr_t *, int);
     49      1.2  bouyer void xen_shm_unmap(vaddr_t, paddr_t *, int, int);
     50  1.3.4.1    yamt #endif
     51      1.2  bouyer int xen_shm_callback(int (*)(void *), void *);
     52      1.2  bouyer 
     53      1.2  bouyer /* flags for xen_shm_map() */
     54      1.2  bouyer #define XSHM_CALLBACK 0x01	/* called from a callback */
     55  1.3.4.1    yamt #define XSHM_RO 0x02		/* map the guest's memory read-only */
     56