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 */ 29 30 #include <dev/raid/ips/ips.h> 31 #include <dev/raid/ips/ips_ioctl.h> 32 33 static void 34 ips_ioctl_finish(ips_command_t *command) 35 { 36 ips_ioctl_t *ioctl_cmd = command->arg; 37 38 if (ioctl_cmd->readwrite & IPS_IOCTL_READ) { 39 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 40 BUS_DMASYNC_POSTREAD); 41 } else if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) { 42 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 43 BUS_DMASYNC_POSTWRITE); 44 } 45 bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 46 BUS_DMASYNC_POSTWRITE); 47 bus_dmamap_unload(ioctl_cmd->dmatag, ioctl_cmd->dmamap); 48 ioctl_cmd->status.value = command->status.value; 49 ips_insert_free_cmd(command->sc, command); 50 } 51 52 static void 53 ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments, 54 int segnum, int error) 55 { 56 ips_command_t *command; 57 ips_ioctl_t *ioctl_cmd; 58 ips_generic_cmd *command_buffer; 59 60 command = cmdptr; 61 ioctl_cmd = command->arg; 62 command_buffer = command->command_buffer; 63 if (error) { 64 ioctl_cmd->status.value = IPS_ERROR_STATUS; 65 ips_insert_free_cmd(command->sc, command); 66 return; 67 } 68 command_buffer->id = command->id; 69 command_buffer->buffaddr = segments[0].ds_addr; 70 if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) { 71 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 72 BUS_DMASYNC_PREWRITE); 73 } else if (ioctl_cmd->readwrite & IPS_IOCTL_READ) { 74 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 75 BUS_DMASYNC_PREREAD); 76 } 77 bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 78 BUS_DMASYNC_PREWRITE); 79 command->sc->ips_issue_cmd(command); 80 } 81 82 static int 83 ips_ioctl_start(ips_command_t *command) 84 { 85 ips_ioctl_t *ioctl_cmd = command->arg; 86 87 memcpy(command->command_buffer, ioctl_cmd->command_buffer, 88 sizeof(ips_generic_cmd)); 89 command->callback = ips_ioctl_finish; 90 bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 91 ioctl_cmd->data_buffer, ioctl_cmd->datasize, ips_ioctl_callback, 92 command, 0); 93 return 0; 94 } 95 96 static int 97 ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd, 98 ips_user_request *user_request) 99 { 100 ips_command_t *command; 101 int error = EINVAL; 102 103 if (bus_dma_tag_create( 104 /* parent */ sc->adapter_dmatag, 105 /* alignment */ 1, 106 /* boundary */ 0, 107 /* lowaddr */ BUS_SPACE_MAXADDR_32BIT, 108 /* highaddr */ BUS_SPACE_MAXADDR, 109 /* filter */ NULL, 110 /* filterarg */ NULL, 111 /* maxsize */ ioctl_cmd->datasize, 112 /* numsegs */ 1, 113 /* maxsegsize*/ ioctl_cmd->datasize, 114 /* flags */ 0, 115 &ioctl_cmd->dmatag) != 0) { 116 return ENOMEM; 117 } 118 if (bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer, 119 0, &ioctl_cmd->dmamap)) { 120 error = ENOMEM; 121 goto exit; 122 } 123 if (copyin(user_request->data_buffer, ioctl_cmd->data_buffer, 124 ioctl_cmd->datasize)) 125 goto exit; 126 ioctl_cmd->status.value = 0xffffffff; 127 lockmgr(&sc->queue_lock, LK_EXCLUSIVE|LK_RETRY); 128 if ((error = ips_get_free_cmd(sc, &command, 0)) > 0) { 129 error = ENOMEM; 130 lockmgr(&sc->queue_lock, LK_RELEASE); 131 goto exit; 132 } 133 command->arg = ioctl_cmd; 134 ips_ioctl_start(command); 135 while (ioctl_cmd->status.value == 0xffffffff) 136 tsleep(ioctl_cmd, 0, "ips", hz / 10); 137 if (COMMAND_ERROR(&ioctl_cmd->status)) 138 error = EIO; 139 else 140 error = 0; 141 lockmgr(&sc->queue_lock, LK_RELEASE); 142 143 if (copyout(ioctl_cmd->data_buffer, user_request->data_buffer, 144 ioctl_cmd->datasize)) 145 error = EINVAL; 146 exit: 147 bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer, 148 ioctl_cmd->dmamap); 149 bus_dma_tag_destroy(ioctl_cmd->dmatag); 150 return error; 151 } 152 153 int 154 ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr, 155 int32_t flags) 156 { 157 ips_ioctl_t *ioctl_cmd; 158 ips_user_request *user_request; 159 int error = EINVAL; 160 161 switch (ioctl_request) { 162 case IPS_USER_CMD: 163 user_request = (ips_user_request *)addr; 164 ioctl_cmd = kmalloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK); 165 ioctl_cmd->command_buffer = kmalloc(sizeof(ips_generic_cmd), 166 M_IPSBUF, M_WAITOK); 167 if (copyin(user_request->command_buffer, 168 ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))) { 169 kfree(ioctl_cmd->command_buffer, M_IPSBUF); 170 kfree(ioctl_cmd, M_IPSBUF); 171 break; 172 } 173 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE; 174 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE; 175 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request); 176 kfree(ioctl_cmd->command_buffer, M_IPSBUF); 177 kfree(ioctl_cmd, M_IPSBUF); 178 break; 179 } 180 return error; 181 } 182