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https://github.com/xen-project/xen.git
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Oleksandr Andrushchenko
ee8105cabc
Add support for Linux grant device driver extension which allows converting existing dma-buf's into an array of grant references and vise versa. This is only implemented for Linux as other OSes have no Linux dma-buf support. Bump gnttab library minor version to 3. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Acked-by: Wei Liu <wei.liu2@citrix.com>
73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
#ifndef XENGNTTAB_PRIVATE_H
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#define XENGNTTAB_PRIVATE_H
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#include <xentoollog.h>
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#include <xentoolcore_internal.h>
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#include <xengnttab.h>
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/* Set of macros/defines used by both Linux and FreeBSD */
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#define ROUNDUP(_x,_w) (((unsigned long)(_x)+(1UL<<(_w))-1) & ~((1UL<<(_w))-1))
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#define GTERROR(_l, _f...) xtl_log(_l, XTL_ERROR, errno, "gnttab", _f)
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#define GSERROR(_l, _f...) xtl_log(_l, XTL_ERROR, errno, "gntshr", _f)
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struct xengntdev_handle {
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xentoollog_logger *logger, *logger_tofree;
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int fd;
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Xentoolcore__Active_Handle tc_ah;
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};
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int osdep_gnttab_open(xengnttab_handle *xgt);
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int osdep_gnttab_close(xengnttab_handle *xgt);
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int osdep_gnttab_set_max_grants(xengnttab_handle *xgt, uint32_t count);
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#define XENGNTTAB_GRANT_MAP_SINGLE_DOMAIN 0x1
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void *osdep_gnttab_grant_map(xengnttab_handle *xgt,
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uint32_t count, int flags, int prot,
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uint32_t *domids, uint32_t *refs,
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uint32_t notify_offset,
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evtchn_port_t notify_port);
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int osdep_gnttab_unmap(xengnttab_handle *xgt,
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void *start_address,
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uint32_t count);
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int osdep_gnttab_grant_copy(xengnttab_handle *xgt,
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uint32_t count,
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xengnttab_grant_copy_segment_t *segs);
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int osdep_gnttab_dmabuf_exp_from_refs(xengnttab_handle *xgt, uint32_t domid,
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uint32_t flags, uint32_t count,
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const uint32_t *refs, uint32_t *fd);
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int osdep_gnttab_dmabuf_exp_wait_released(xengnttab_handle *xgt,
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uint32_t fd, uint32_t wait_to_ms);
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int osdep_gnttab_dmabuf_imp_to_refs(xengnttab_handle *xgt, uint32_t domid,
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uint32_t fd, uint32_t count,
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uint32_t *refs);
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int osdep_gnttab_dmabuf_imp_release(xengnttab_handle *xgt, uint32_t fd);
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int osdep_gntshr_open(xengntshr_handle *xgs);
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int osdep_gntshr_close(xengntshr_handle *xgs);
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void *osdep_gntshr_share_pages(xengntshr_handle *xgs,
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uint32_t domid, int count,
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uint32_t *refs, int writable,
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uint32_t notify_offset,
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evtchn_port_t notify_port);
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int osdep_gntshr_unshare(xengntshr_handle *xgs,
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void *start_address, uint32_t count);
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#endif
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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