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/*- * Copyright (c) 2003 * Fraunhofer Institute for Open Communication Systems (FhG Fokus). * 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. * * Author: Hartmut Brandt <harti@freebsd.org> */ /* * This implements pools of DMA-able buffers that conserve DMA address space * by putting several buffers into one page and that allow to map between * 32-bit handles for the buffer and buffer addresses (to use 32-bit network * interfaces on 64bit machines). This assists network interfaces that may need * huge numbers of mbufs. * * $FreeBSD: release/9.1.0/sys/sys/mbpool.h 139825 2005-01-07 02:29:27Z imp $ */ #ifndef _SYS_MBPOOL_H_ #define _SYS_MBPOOL_H_ #ifdef _KERNEL #include <sys/queue.h> /* opaque */ struct mbpool; /* size of reserved area at end of each chunk */ #define MBPOOL_TRAILER_SIZE 4 /* maximum value of max_pages */ #define MBPOOL_MAX_MAXPAGES ((1 << 14) - 1) /* maximum number of chunks per page */ #define MBPOOL_MAX_CHUNKS (1 << 9) /* initialize a pool */ int mbp_create(struct mbpool **, const char *, bus_dma_tag_t, u_int, size_t, size_t); /* destroy a pool */ void mbp_destroy(struct mbpool *); /* allocate a chunk and set used and on card */ void *mbp_alloc(struct mbpool *, bus_addr_t *, uint32_t *); /* free a chunk */ void mbp_free(struct mbpool *, void *); /* free a chunk that is an external mbuf */ void mbp_ext_free(void *, void *); /* free all buffers that are marked to be on the card */ void mbp_card_free(struct mbpool *); /* count used buffers and buffers on card */ void mbp_count(struct mbpool *, u_int *, u_int *, u_int *); /* get the buffer from a handle and clear card bit */ void *mbp_get(struct mbpool *, uint32_t); /* get the buffer from a handle and don't clear card bit */ void *mbp_get_keep(struct mbpool *, uint32_t); /* sync the chunk */ void mbp_sync(struct mbpool *, uint32_t, bus_addr_t, bus_size_t, u_int); #endif /* _KERNEL */ #endif /* _SYS_MBPOOL_H_ */