1 /*- 2 * Written by: David Jeffery 3 * Copyright (c) 2002 Adaptec Inc. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: src/sys/dev/ips/ips_ioctl.c,v 1.5 2004/05/30 04:01:29 scottl Exp $ 28 * $DragonFly: src/sys/dev/raid/ips/ips_ioctl.c,v 1.8 2006/09/05 03:48:11 dillon Exp $ 29 */ 30 31 #include <dev/raid/ips/ips.h> 32 #include <dev/raid/ips/ips_ioctl.h> 33 #include <sys/thread2.h> 34 35 static void 36 ips_ioctl_finish(ips_command_t *command) 37 { 38 ips_ioctl_t *ioctl_cmd = command->arg; 39 40 if (ioctl_cmd->readwrite & IPS_IOCTL_READ) { 41 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 42 BUS_DMASYNC_POSTREAD); 43 } else if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) { 44 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 45 BUS_DMASYNC_POSTWRITE); 46 } 47 bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 48 BUS_DMASYNC_POSTWRITE); 49 bus_dmamap_unload(ioctl_cmd->dmatag, ioctl_cmd->dmamap); 50 ioctl_cmd->status.value = command->status.value; 51 ips_insert_free_cmd(command->sc, command); 52 } 53 54 static void 55 ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments, 56 int segnum, int error) 57 { 58 ips_command_t *command; 59 ips_ioctl_t *ioctl_cmd; 60 ips_generic_cmd *command_buffer; 61 62 command = cmdptr; 63 ioctl_cmd = command->arg; 64 command_buffer = command->command_buffer; 65 if (error) { 66 ioctl_cmd->status.value = IPS_ERROR_STATUS; 67 ips_insert_free_cmd(command->sc, command); 68 return; 69 } 70 command_buffer->id = command->id; 71 command_buffer->buffaddr = segments[0].ds_addr; 72 if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) { 73 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 74 BUS_DMASYNC_PREWRITE); 75 } else if (ioctl_cmd->readwrite & IPS_IOCTL_READ) { 76 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 77 BUS_DMASYNC_PREREAD); 78 } 79 bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 80 BUS_DMASYNC_PREWRITE); 81 command->sc->ips_issue_cmd(command); 82 } 83 84 static int 85 ips_ioctl_start(ips_command_t *command) 86 { 87 ips_ioctl_t *ioctl_cmd = command->arg; 88 89 memcpy(command->command_buffer, ioctl_cmd->command_buffer, 90 sizeof(ips_generic_cmd)); 91 command->callback = ips_ioctl_finish; 92 bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 93 ioctl_cmd->data_buffer, ioctl_cmd->datasize, ips_ioctl_callback, 94 command, 0); 95 return 0; 96 } 97 98 static int 99 ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd, 100 ips_user_request *user_request) 101 { 102 ips_command_t *command; 103 int error = EINVAL; 104 105 if (bus_dma_tag_create( 106 /* parent */ sc->adapter_dmatag, 107 /* alignment */ 1, 108 /* boundary */ 0, 109 /* lowaddr */ BUS_SPACE_MAXADDR_32BIT, 110 /* highaddr */ BUS_SPACE_MAXADDR, 111 /* filter */ NULL, 112 /* filterarg */ NULL, 113 /* maxsize */ ioctl_cmd->datasize, 114 /* numsegs */ 1, 115 /* maxsegsize*/ ioctl_cmd->datasize, 116 /* flags */ 0, 117 &ioctl_cmd->dmatag) != 0) { 118 return ENOMEM; 119 } 120 if (bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer, 121 0, &ioctl_cmd->dmamap)) { 122 error = ENOMEM; 123 goto exit; 124 } 125 if (copyin(user_request->data_buffer, ioctl_cmd->data_buffer, 126 ioctl_cmd->datasize)) 127 goto exit; 128 ioctl_cmd->status.value = 0xffffffff; 129 lockmgr(&sc->queue_lock, LK_EXCLUSIVE|LK_RETRY); 130 if ((error = ips_get_free_cmd(sc, &command, 0)) > 0) { 131 error = ENOMEM; 132 lockmgr(&sc->queue_lock, LK_RELEASE); 133 goto exit; 134 } 135 command->arg = ioctl_cmd; 136 ips_ioctl_start(command); 137 while (ioctl_cmd->status.value == 0xffffffff) 138 tsleep(ioctl_cmd, 0, "ips", hz / 10); 139 if (COMMAND_ERROR(&ioctl_cmd->status)) 140 error = EIO; 141 else 142 error = 0; 143 lockmgr(&sc->queue_lock, LK_RELEASE); 144 145 if (copyout(ioctl_cmd->data_buffer, user_request->data_buffer, 146 ioctl_cmd->datasize)) 147 error = EINVAL; 148 exit: 149 bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer, 150 ioctl_cmd->dmamap); 151 bus_dma_tag_destroy(ioctl_cmd->dmatag); 152 return error; 153 } 154 155 int 156 ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr, 157 int32_t flags) 158 { 159 ips_ioctl_t *ioctl_cmd; 160 ips_user_request *user_request; 161 int error = EINVAL; 162 163 switch (ioctl_request) { 164 case IPS_USER_CMD: 165 user_request = (ips_user_request *)addr; 166 ioctl_cmd = kmalloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK); 167 ioctl_cmd->command_buffer = kmalloc(sizeof(ips_generic_cmd), 168 M_IPSBUF, M_WAITOK); 169 if (copyin(user_request->command_buffer, 170 ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))) { 171 kfree(ioctl_cmd->command_buffer, M_IPSBUF); 172 kfree(ioctl_cmd, M_IPSBUF); 173 break; 174 } 175 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE; 176 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE; 177 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request); 178 kfree(ioctl_cmd->command_buffer, M_IPSBUF); 179 kfree(ioctl_cmd, M_IPSBUF); 180 break; 181 } 182 return error; 183 } 184