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 } 104