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authorJohn Crispin <john@openwrt.org>2016-04-26 11:44:36 +0000
committerJohn Crispin <john@openwrt.org>2016-04-26 11:44:36 +0000
commitee53a240ac902dc83209008a2671e7fdcf55957a (patch)
tree46784099f9e7783611272498ec69702911a65a4c /target/linux/mvebu/patches-3.10/0046-bus-mvebu-mbus-Add-new-API-for-the-PCIe-memory-and-I.patch
parentbe1985471e009ac069a61c8e6680067058a6cb82 (diff)
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ar71xx: Add support for the OMYlink OMY-G1reboot
https://wiki.openwrt.org/toh/omylink/omy-g1 http://www.omylink.com/ Signed-off-by: L. D. Pinney <ldpinney@gmail.com> SVN-Revision: 49258
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0046-bus-mvebu-mbus-Add-new-API-for-the-PCIe-memory-and-I.patch')
0 files changed, 0 insertions, 0 deletions
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/******************************************************************************
 *
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, version 2 of the
 * License.
 */

#include "xc_private.h"

#include <xen/memory.h>
#include <xen/sys/evtchn.h>
#include <unistd.h>
#include <fcntl.h>

int xc_interface_open(void)
{
    int flags, saved_errno;
    int fd = open("/dev/xen/privcmd", O_RDWR);

    if ( fd == -1 )
    {
        PERROR("Could not obtain handle on privileged command interface");
        return -1;
    }

    /* Although we return the file handle as the 'xc handle' the API
       does not specify / guarentee that this integer is in fact
       a file handle. Thus we must take responsiblity to ensure
       it doesn't propagate (ie leak) outside the process */
    if ( (flags = fcntl(fd, F_GETFD)) < 0 )
    {
        PERROR("Could not get file handle flags");
        goto error;
    }
    flags |= FD_CLOEXEC;
    if ( fcntl(fd, F_SETFD, flags) < 0 )
    {
        PERROR("Could not set file handle flags");
        goto error;
    }

    return fd;

 error:
    saved_errno = errno;
    close(fd);
    errno = saved_errno;
    return -1;
}

int xc_interface_close(int xc_handle)
{
    return close(xc_handle);
}

void *xc_map_foreign_batch(int xc_handle, uint32_t dom, int prot,
                           xen_pfn_t *arr, int num)
{
    privcmd_mmapbatch_t ioctlx;
    void *addr;
    addr = mmap(NULL, num*PAGE_SIZE, prot, MAP_SHARED, xc_handle, 0);
    if ( addr == MAP_FAILED )
        return NULL;

    ioctlx.num=num;
    ioctlx.dom=dom;
    ioctlx.addr=(unsigned long)addr;
    ioctlx.arr=arr;
    if ( ioctl(xc_handle, IOCTL_PRIVCMD_MMAPBATCH, &ioctlx) < 0 )
    {
        int saved_errno = errno;
        perror("XXXXXXXX");
        (void)munmap(addr, num*PAGE_SIZE);
        errno = saved_errno;
        return NULL;
    }
    return addr;

}

void *xc_map_foreign_range(int xc_handle, uint32_t dom,
                           int size, int prot,
                           unsigned long mfn)
{
    privcmd_mmap_t ioctlx;
    privcmd_mmap_entry_t entry;
    void *addr;
    addr = mmap(NULL, size, prot, MAP_SHARED, xc_handle, 0);
    if ( addr == MAP_FAILED )
        return NULL;

    ioctlx.num=1;
    ioctlx.dom=dom;
    ioctlx.entry=&entry;
    entry.va=(unsigned long) addr;
    entry.mfn=mfn;
    entry.npages=(size+PAGE_SIZE-1)>>PAGE_SHIFT;
    if ( ioctl(xc_handle, IOCTL_PRIVCMD_MMAP, &ioctlx) < 0 )
    {
        int saved_errno = errno;
        (void)munmap(addr, size);
        errno = saved_errno;
        return NULL;
    }
    return addr;
}

void *xc_map_foreign_ranges(int xc_handle, uint32_t dom,
                            size_t size, int prot, size_t chunksize,
                            privcmd_mmap_entry_t entries[], int nentries)
{
    privcmd_mmap_t ioctlx;
    int i, rc;
    void *addr;

    addr = mmap(NULL, size, prot, MAP_SHARED, xc_handle, 0);
    if (addr == MAP_FAILED)
        goto mmap_failed;

    for (i = 0; i < nentries; i++) {
        entries[i].va = (uintptr_t)addr + (i * chunksize);
        entries[i].npages = chunksize >> PAGE_SHIFT;
    }

    ioctlx.num   = nentries;
    ioctlx.dom   = dom;
    ioctlx.entry = entries;

    rc = ioctl(xc_handle, IOCTL_PRIVCMD_MMAP, &ioctlx);
    if (rc)
        goto ioctl_failed;

    return addr;

ioctl_failed:
    rc = munmap(addr, size);
    if (rc == -1)
        ERROR("%s: error in error path\n", __FUNCTION__);

mmap_failed:
    return NULL;
}


static int do_privcmd(int xc_handle, unsigned int cmd, unsigned long data)
{
    return ioctl(xc_handle, cmd, data);
}

int do_xen_hypercall(int xc_handle, privcmd_hypercall_t *hypercall)
{
    return do_privcmd(xc_handle,
                      IOCTL_PRIVCMD_HYPERCALL,
                      (unsigned long)hypercall);
}

int xc_evtchn_open(void)
{
    int fd;

    if ( (fd = open("/dev/xen/evtchn", O_RDWR)) == -1 )