1 /*- 2 * Copyright (c) 2018-2019 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 #include "opt_platform.h" 33 #include <sys/param.h> 34 #include <sys/conf.h> 35 #include <sys/bus.h> 36 #include <sys/kernel.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/mutex.h> 40 41 #include <machine/bus.h> 42 43 #include <dev/xdma/xdma.h> 44 45 int 46 xdma_dequeue(xdma_channel_t *xchan, void **user, 47 xdma_transfer_status_t *status) 48 { 49 struct xdma_request *xr_tmp; 50 struct xdma_request *xr; 51 52 QUEUE_OUT_LOCK(xchan); 53 TAILQ_FOREACH_SAFE(xr, &xchan->queue_out, xr_next, xr_tmp) { 54 TAILQ_REMOVE(&xchan->queue_out, xr, xr_next); 55 break; 56 } 57 QUEUE_OUT_UNLOCK(xchan); 58 59 if (xr == NULL) 60 return (-1); 61 62 *user = xr->user; 63 status->error = xr->status.error; 64 status->transferred = xr->status.transferred; 65 66 xchan_bank_put(xchan, xr); 67 68 return (0); 69 } 70 71 int 72 xdma_enqueue(xdma_channel_t *xchan, uintptr_t src, uintptr_t dst, 73 uint8_t src_width, uint8_t dst_width, bus_size_t len, 74 enum xdma_direction dir, void *user) 75 { 76 struct xdma_request *xr; 77 78 KASSERT(xchan->xdma != NULL, ("xdma is NULL")); 79 80 xr = xchan_bank_get(xchan); 81 if (xr == NULL) 82 return (-1); /* No space is available. */ 83 84 xr->user = user; 85 xr->direction = dir; 86 xr->m = NULL; 87 xr->bp = NULL; 88 xr->block_num = 1; 89 xr->block_len = len; 90 xr->req_type = XR_TYPE_VIRT; 91 xr->src_addr = src; 92 xr->dst_addr = dst; 93 xr->src_width = src_width; 94 xr->dst_width = dst_width; 95 96 QUEUE_IN_LOCK(xchan); 97 TAILQ_INSERT_TAIL(&xchan->queue_in, xr, xr_next); 98 QUEUE_IN_UNLOCK(xchan); 99 100 return (0); 101 } 102 103 int 104 xdma_queue_submit(xdma_channel_t *xchan) 105 { 106 int ret; 107 108 KASSERT(xchan->xdma != NULL, ("xdma is NULL")); 109 110 ret = 0; 111 112 XCHAN_LOCK(xchan); 113 114 if (xchan->flags & XCHAN_TYPE_SG) 115 ret = xdma_queue_submit_sg(xchan); 116 117 XCHAN_UNLOCK(xchan); 118 119 return (ret); 120 } 121