xdma_bio.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*-
    2  * Copyright (c) 2017-2019 Ruslan Bukin <br@bsdpad.com>
    3  * All rights reserved.
    4  *
    5  * This software was developed by SRI International and the University of
    6  * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
    7  * ("CTSRD"), as part of the DARPA CRASH research programme.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   33 
   34 #include "opt_platform.h"
   35 #include <sys/param.h>
   36 #include <sys/conf.h>
   37 #include <sys/bus.h>
   38 #include <sys/kernel.h>
   39 #include <sys/lock.h>
   40 #include <sys/malloc.h>
   41 #include <sys/mutex.h>
   42 
   43 #include <machine/bus.h>
   44 
   45 #include <dev/xdma/xdma.h>
   46 
   47 int
   48 xdma_dequeue_bio(xdma_channel_t *xchan, struct bio **bp,
   49     xdma_transfer_status_t *status)
   50 {
   51         struct xdma_request *xr_tmp;
   52         struct xdma_request *xr;
   53 
   54         QUEUE_OUT_LOCK(xchan);
   55         TAILQ_FOREACH_SAFE(xr, &xchan->queue_out, xr_next, xr_tmp) {
   56                 TAILQ_REMOVE(&xchan->queue_out, xr, xr_next);
   57                 break;
   58         }
   59         QUEUE_OUT_UNLOCK(xchan);
   60 
   61         if (xr == NULL)
   62                 return (-1);
   63 
   64         *bp = xr->bp;
   65 
   66         status->error = xr->status.error;
   67         status->transferred = xr->status.transferred;
   68 
   69         xchan_bank_put(xchan, xr);
   70 
   71         return (0);
   72 }
   73 
   74 int
   75 xdma_enqueue_bio(xdma_channel_t *xchan, struct bio **bp,
   76     bus_addr_t addr, uint8_t src_width, uint8_t dst_width,
   77     enum xdma_direction dir)
   78 {
   79         struct xdma_request *xr;
   80 
   81         xr = xchan_bank_get(xchan);
   82         if (xr == NULL)
   83                 return (-1); /* No space is available yet. */
   84 
   85         xr->direction = dir;
   86         xr->bp = *bp;
   87         xr->req_type = XR_TYPE_BIO;
   88         xr->src_width = src_width;
   89         xr->dst_width = dst_width;
   90         if (dir == XDMA_MEM_TO_DEV) {
   91                 xr->dst_addr = addr;
   92                 xr->src_addr = 0;
   93         } else {
   94                 xr->dst_addr = 0;
   95                 xr->src_addr = addr;
   96         }
   97 
   98         QUEUE_IN_LOCK(xchan);
   99         TAILQ_INSERT_TAIL(&xchan->queue_in, xr, xr_next);
  100         QUEUE_IN_UNLOCK(xchan);
  101 
  102         return (0);
  103 }

Cache object: 3bf9eb25da822a9b68bcf1aeb95d33c4

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/dev/xdma/xdma_bio.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/xdma/xdma_bio.c