diff options
Diffstat (limited to 'sys/dev/cxgbe/t4_mp_ring.h')
| -rw-r--r-- | sys/dev/cxgbe/t4_mp_ring.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/sys/dev/cxgbe/t4_mp_ring.h b/sys/dev/cxgbe/t4_mp_ring.h new file mode 100644 index 000000000000..c9ee3464b097 --- /dev/null +++ b/sys/dev/cxgbe/t4_mp_ring.h @@ -0,0 +1,68 @@ +/*- + * Copyright (c) 2014 Chelsio Communications, Inc. + * All rights reserved. + * Written by: Navdeep Parhar <np@FreeBSD.org> + * + * 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. + * + * $FreeBSD$ + * + */ + +#ifndef __CXGBE_MP_RING_H +#define __CXGBE_MP_RING_H + +#ifndef _KERNEL +#error "no user-serviceable parts inside" +#endif + +struct mp_ring; +typedef u_int (*ring_drain_t)(struct mp_ring *, u_int, u_int); +typedef u_int (*ring_can_drain_t)(struct mp_ring *); + +struct mp_ring { + volatile uint64_t state __aligned(CACHE_LINE_SIZE); + + int size __aligned(CACHE_LINE_SIZE); + void * cookie; + struct malloc_type * mt; + ring_drain_t drain; + ring_can_drain_t can_drain; /* cheap, may be unreliable */ + counter_u64_t enqueues; + counter_u64_t drops; + counter_u64_t starts; + counter_u64_t stalls; + counter_u64_t restarts; /* recovered after stalling */ + counter_u64_t abdications; + + void * volatile items[] __aligned(CACHE_LINE_SIZE); +}; + +int mp_ring_alloc(struct mp_ring **, int, void *, ring_drain_t, + ring_can_drain_t, struct malloc_type *, int); +void mp_ring_free(struct mp_ring *); +int mp_ring_enqueue(struct mp_ring *, void **, int, int); +void mp_ring_check_drainage(struct mp_ring *, int); +void mp_ring_reset_stats(struct mp_ring *); +int mp_ring_is_idle(struct mp_ring *); + +#endif |