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author | Jennifer Averett <jennifer.averett@oarcorp.com> | 2012-05-09 12:28:53 -0500 |
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committer | Jennifer Averett <jennifer.averett@oarcorp.com> | 2012-05-09 12:28:53 -0500 |
commit | 2dbdc7c926aa0ce8abb8dc1de929dbf4d277a2db (patch) | |
tree | 4bc898175b621e7ecf0333fa18f0d7c8eb020819 /freebsd/kern/subr_bufring.c | |
parent | Added documentation on rtems specific files. (diff) | |
download | rtems-libbsd-2dbdc7c926aa0ce8abb8dc1de929dbf4d277a2db.tar.bz2 |
Added EtherExpress, tulip, and Broadcom Nics.
BCM570x, E1000, and Legacy Nics are commented out until pieces are
added to get them to link.
Diffstat (limited to 'freebsd/kern/subr_bufring.c')
-rw-r--r-- | freebsd/kern/subr_bufring.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/freebsd/kern/subr_bufring.c b/freebsd/kern/subr_bufring.c new file mode 100644 index 00000000..8ec8b9d7 --- /dev/null +++ b/freebsd/kern/subr_bufring.c @@ -0,0 +1,67 @@ +#include <freebsd/machine/rtems-bsd-config.h> + +/*- + * Copyright (c) 2007, 2008 Kip Macy <kmacy@freebsd.org> + * 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. + */ + +#include <freebsd/sys/cdefs.h> +__FBSDID("$FreeBSD$"); + + +#include <freebsd/sys/param.h> +#include <freebsd/sys/systm.h> +#include <freebsd/sys/kernel.h> +#include <freebsd/sys/malloc.h> +#include <freebsd/sys/ktr.h> +#include <freebsd/sys/buf_ring.h> + + +struct buf_ring * +buf_ring_alloc(int count, struct malloc_type *type, int flags, struct mtx *lock) +{ + struct buf_ring *br; + + KASSERT(powerof2(count), ("buf ring must be size power of 2")); + + br = malloc(sizeof(struct buf_ring) + count*sizeof(caddr_t), + type, flags|M_ZERO); + if (br == NULL) + return (NULL); +#ifdef DEBUG_BUFRING + br->br_lock = lock; +#endif + br->br_prod_size = br->br_cons_size = count; + br->br_prod_mask = br->br_cons_mask = count-1; + br->br_prod_head = br->br_cons_head = 0; + br->br_prod_tail = br->br_cons_tail = 0; + + return (br); +} + +void +buf_ring_free(struct buf_ring *br, struct malloc_type *type) +{ + free(br, type); +} |