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6bc11b1414
freebsd-dev/lib/libbluetooth/bluetooth.h
Alan Somers 8907f744ff Improve performance and functionality of the bitstring(3) api 
Two new functions are provided, bit_ffs_at() and bit_ffc_at(), which allow
for efficient searching of set or cleared bits starting from any bit offset
within the bit string.

Performance is improved by operating on longs instead of bytes and using
ffsl() for searches within a long. ffsl() is a compiler builtin in both
clang and gcc for most architectures, converting what was a brute force
while loop search into a couple of instructions.

All of the bitstring(3) API continues to be contained in the header file.
Some of the functions are large enough that perhaps they should be uninlined
and moved to a library, but that is beyond the scope of this commit.

sys/sys/bitstring.h:
        Convert the majority of the existing bit string implementation from
        macros to inline functions.

        Properly protect the implementation from inadvertant macro expansion
        when included in a user's program by prefixing all private
        macros/functions and local variables with '_'.

        Add bit_ffs_at() and bit_ffc_at(). Implement bit_ffs() and
        bit_ffc() in terms of their "at" counterparts.

        Provide a kernel implementation of bit_alloc(), making the full API
        usable in the kernel.

        Improve code documenation.

share/man/man3/bitstring.3:
        Add pre-exisiting API bit_ffc() to the synopsis.

        Document new APIs.

        Document the initialization state of the bit strings
        allocated/declared by bit_alloc() and bit_decl().

        Correct documentation for bitstr_size(). The original code comments
        indicate the size is in bytes, not "elements of bitstr_t". The new
        implementation follows this lead. Only hastd assumed "elements"
        rather than bytes and it has been corrected.

etc/mtree/BSD.tests.dist:
tests/sys/Makefile:
tests/sys/sys/Makefile:
tests/sys/sys/bitstring.c:
        Add tests for all existing and new functionality.

include/bitstring.h
	Include all headers needed by sys/bitstring.h

lib/libbluetooth/bluetooth.h:
usr.sbin/bluetooth/hccontrol/le.c:
        Include bitstring.h instead of sys/bitstring.h.

sbin/hastd/activemap.c:
        Correct usage of bitstr_size().

sys/dev/xen/blkback/blkback.c
        Use new bit_alloc.

sys/kern/subr_unit.c:
        Remove hard-coded assumption that sizeof(bitstr_t) is 1.  Get rid of
        unrb.busy, which caches the number of bits set in unrb.map.  When
        INVARIANTS are disabled, nothing needs to know that information.
        callapse_unr can be adapted to use bit_ffs and bit_ffc instead.
        Eliminating unrb.busy saves memory, simplifies the code, and
        provides a slight speedup when INVARIANTS are disabled.

sys/net/flowtable.c:
        Use the new kernel implementation of bit-alloc, instead of hacking
        the old libc-dependent macro.

sys/sys/param.h
        Update __FreeBSD_version to indicate availability of new API

Submitted by:   gibbs, asomers
Reviewed by:    gibbs, ngie
MFC after:      4 weeks
Sponsored by:   Spectra Logic Corp
Differential Revision:  https://reviews.freebsd.org/D6004
2016-05-04 22:34:11 +00:00

219 lines
6.2 KiB
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/*
* bluetooth.h
*/
/*-
* Copyright (c) 2001-2009 Maksim Yevmenkin <m_evmenkin@yahoo.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: bluetooth.h,v 1.5 2003/09/14 23:28:42 max Exp $
* $FreeBSD$
*/
#ifndef _BLUETOOTH_H_
#define _BLUETOOTH_H_
#include <sys/types.h>
#include <sys/endian.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <sys/un.h>
#include <errno.h>
#include <netdb.h>
#include <bitstring.h>
#include <netgraph/ng_message.h>
#include <netgraph/bluetooth/include/ng_hci.h>
#include <netgraph/bluetooth/include/ng_l2cap.h>
#include <netgraph/bluetooth/include/ng_btsocket.h>
#include <time.h>
__BEGIN_DECLS
/*
* Linux BlueZ compatibility
*/
#define bacmp(ba1, ba2) memcmp((ba1), (ba2), sizeof(bdaddr_t))
#define bacpy(dst, src) memcpy((dst), (src), sizeof(bdaddr_t))
#define ba2str(ba, str) bt_ntoa((ba), (str))
#define str2ba(str, ba) (bt_aton((str), (ba)) == 1? 0 : -1)
#define htobs(d) htole16(d)
#define htobl(d) htole32(d)
#define btohs(d) le16toh(d)
#define btohl(d) le32toh(d)
/*
* Interface to the outside world
*/
struct hostent * bt_gethostbyname (char const *name);
struct hostent * bt_gethostbyaddr (char const *addr, int len, int type);
struct hostent * bt_gethostent (void);
void bt_sethostent (int stayopen);
void bt_endhostent (void);
struct protoent * bt_getprotobyname (char const *name);
struct protoent * bt_getprotobynumber (int proto);
struct protoent * bt_getprotoent (void);
void bt_setprotoent (int stayopen);
void bt_endprotoent (void);
char const * bt_ntoa (bdaddr_t const *ba, char *str);
int bt_aton (char const *str, bdaddr_t *ba);
/* bt_devXXXX() functions (inspired by NetBSD) */
int bt_devaddr (char const *devname, bdaddr_t *addr);
int bt_devname (char *devname, bdaddr_t const *addr);
/*
* Bluetooth HCI functions
*/
#define HCI_DEVMAX 32 /* arbitrary */
#define HCI_DEVNAME_SIZE NG_NODESIZ
#define HCI_DEVFEATURES_SIZE NG_HCI_FEATURES_SIZE
struct bt_devinfo
{
char devname[HCI_DEVNAME_SIZE];
uint32_t state; /* device/implementation specific */
bdaddr_t bdaddr;
uint16_t _reserved0;
uint8_t features[HCI_DEVFEATURES_SIZE];
/* buffer info */
uint16_t _reserved1;
uint16_t cmd_free;
uint16_t sco_size;
uint16_t sco_pkts;
uint16_t sco_free;
uint16_t acl_size;
uint16_t acl_pkts;
uint16_t acl_free;
/* stats */
uint32_t cmd_sent;
uint32_t evnt_recv;
uint32_t acl_recv;
uint32_t acl_sent;
uint32_t sco_recv;
uint32_t sco_sent;
uint32_t bytes_recv;
uint32_t bytes_sent;
/* misc/specific */
uint16_t link_policy_info;
uint16_t packet_type_info;
uint16_t role_switch_info;
uint16_t debug;
uint8_t _padding[20]; /* leave space for future additions */
};
struct bt_devreq
{
uint16_t opcode;
uint8_t event;
void *cparam;
size_t clen;
void *rparam;
size_t rlen;
};
struct bt_devfilter {
bitstr_t bit_decl(packet_mask, 8);
bitstr_t bit_decl(event_mask, 256);
};
struct bt_devinquiry {
bdaddr_t bdaddr;
uint8_t pscan_rep_mode;
uint8_t pscan_period_mode;
uint8_t dev_class[3];
uint16_t clock_offset;
int8_t rssi;
uint8_t data[240];
};
typedef int (bt_devenum_cb_t)(int, struct bt_devinfo const *, void *);
int bt_devopen (char const *devname);
int bt_devclose(int s);
int bt_devsend (int s, uint16_t opcode, void *param, size_t plen);
ssize_t bt_devrecv (int s, void *buf, size_t size, time_t to);
int bt_devreq (int s, struct bt_devreq *r, time_t to);
int bt_devfilter(int s, struct bt_devfilter const *newp,
struct bt_devfilter *oldp);
void bt_devfilter_pkt_set(struct bt_devfilter *filter, uint8_t type);
void bt_devfilter_pkt_clr(struct bt_devfilter *filter, uint8_t type);
int bt_devfilter_pkt_tst(struct bt_devfilter const *filter, uint8_t type);
void bt_devfilter_evt_set(struct bt_devfilter *filter, uint8_t event);
void bt_devfilter_evt_clr(struct bt_devfilter *filter, uint8_t event);
int bt_devfilter_evt_tst(struct bt_devfilter const *filter, uint8_t event);
int bt_devinquiry(char const *devname, time_t length, int num_rsp,
struct bt_devinquiry **ii);
int bt_devinfo (struct bt_devinfo *di);
int bt_devenum (bt_devenum_cb_t cb, void *arg);
/*
* bdaddr utility functions (from NetBSD)
*/
static __inline int
bdaddr_same(const bdaddr_t *a, const bdaddr_t *b)
{
return (a->b[0] == b->b[0] && a->b[1] == b->b[1] &&
a->b[2] == b->b[2] && a->b[3] == b->b[3] &&
a->b[4] == b->b[4] && a->b[5] == b->b[5]);
}
static __inline int
bdaddr_any(const bdaddr_t *a)
{
return (a->b[0] == 0 && a->b[1] == 0 && a->b[2] == 0 &&
a->b[3] == 0 && a->b[4] == 0 && a->b[5] == 0);
}
static __inline void
bdaddr_copy(bdaddr_t *d, const bdaddr_t *s)
{
d->b[0] = s->b[0];
d->b[1] = s->b[1];
d->b[2] = s->b[2];
d->b[3] = s->b[3];
d->b[4] = s->b[4];
d->b[5] = s->b[5];
}
__END_DECLS
#endif /* ndef _BLUETOOTH_H_ */
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