ips_ioctl.c revision 140923
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 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: head/sys/dev/ips/ips_ioctl.c 140923 2005-01-28 05:02:13Z scottl $"); 30 31#include <dev/ips/ips.h> 32#include <dev/ips/ips_ioctl.h> 33 34static void ips_ioctl_finish(ips_command_t *command) 35{ 36 ips_ioctl_t *ioctl_cmd = command->arg; 37 if(ioctl_cmd->readwrite & IPS_IOCTL_READ){ 38 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 39 BUS_DMASYNC_POSTREAD); 40 } else if(ioctl_cmd->readwrite & IPS_IOCTL_WRITE){ 41 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 42 BUS_DMASYNC_POSTWRITE); 43 } 44 bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 45 BUS_DMASYNC_POSTWRITE); 46 bus_dmamap_unload(ioctl_cmd->dmatag, ioctl_cmd->dmamap); 47 ioctl_cmd->status.value = command->status.value; 48 ips_insert_free_cmd(command->sc, command); 49} 50 51static void ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,int segnum, int error) 52{ 53 ips_command_t *command = cmdptr; 54 ips_ioctl_t *ioctl_cmd = command->arg; 55 ips_generic_cmd *command_buffer = command->command_buffer; 56 if(error){ 57 ioctl_cmd->status.value = IPS_ERROR_STATUS; 58 ips_insert_free_cmd(command->sc, command); 59 return; 60 } 61 command_buffer->id = command->id; 62 command_buffer->buffaddr = segments[0].ds_addr; 63 if(ioctl_cmd->readwrite & IPS_IOCTL_WRITE){ 64 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 65 BUS_DMASYNC_PREWRITE); 66 } else if(ioctl_cmd->readwrite & IPS_IOCTL_READ){ 67 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 68 BUS_DMASYNC_PREREAD); 69 } 70 bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 71 BUS_DMASYNC_PREWRITE); 72 command->sc->ips_issue_cmd(command); 73} 74static int ips_ioctl_start(ips_command_t *command) 75{ 76 ips_ioctl_t *ioctl_cmd = command->arg; 77 memcpy(command->command_buffer, ioctl_cmd->command_buffer, 78 sizeof(ips_generic_cmd)); 79 command->callback = ips_ioctl_finish; 80 bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 81 ioctl_cmd->data_buffer,ioctl_cmd->datasize, 82 ips_ioctl_callback, command, 0); 83 return 0; 84} 85 86static int ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd, ips_user_request *user_request) 87{ 88 ips_command_t *command; 89 int error = EINVAL; 90 91 if (bus_dma_tag_create( /* parent */ sc->adapter_dmatag, 92 /* alignment */ 1, 93 /* boundary */ 0, 94 /* lowaddr */ BUS_SPACE_MAXADDR_32BIT, 95 /* highaddr */ BUS_SPACE_MAXADDR, 96 /* filter */ NULL, 97 /* filterarg */ NULL, 98 /* maxsize */ ioctl_cmd->datasize, 99 /* numsegs */ 1, 100 /* maxsegsize*/ ioctl_cmd->datasize, 101 /* flags */ 0, 102 /* lockfunc */ NULL, 103 /* lockarg */ NULL, 104 &ioctl_cmd->dmatag) != 0) { 105 return ENOMEM; 106 } 107 if(bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer, 108 0, &ioctl_cmd->dmamap)){ 109 error = ENOMEM; 110 goto exit; 111 } 112 if(copyin(user_request->data_buffer,ioctl_cmd->data_buffer, 113 ioctl_cmd->datasize)) 114 goto exit; 115 ioctl_cmd->status.value = 0xffffffff; 116 mtx_lock(&sc->queue_mtx); 117 if((error = ips_get_free_cmd(sc, &command, 0)) > 0){ 118 error = ENOMEM; 119 mtx_unlock(&sc->queue_mtx); 120 goto exit; 121 } 122 command->arg = ioctl_cmd; 123 ips_ioctl_start(command); 124 while( ioctl_cmd->status.value == 0xffffffff) 125 msleep(ioctl_cmd, &sc->queue_mtx, 0, "ips", hz/10); 126 if(COMMAND_ERROR(&ioctl_cmd->status)) 127 error = EIO; 128 else 129 error = 0; 130 mtx_unlock(&sc->queue_mtx); 131 if(copyout(ioctl_cmd->data_buffer, user_request->data_buffer, 132 ioctl_cmd->datasize)) 133 error = EINVAL; 134exit: bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer, 135 ioctl_cmd->dmamap); 136 bus_dma_tag_destroy(ioctl_cmd->dmatag); 137 return error; 138} 139 140 141int ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr, int32_t flags){ 142 int error = EINVAL; 143 ips_ioctl_t *ioctl_cmd; 144 ips_user_request *user_request; 145 switch(ioctl_request){ 146 case IPS_USER_CMD: 147 user_request = (ips_user_request *)addr; 148 ioctl_cmd = malloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK); 149 ioctl_cmd->command_buffer = malloc(sizeof(ips_generic_cmd), 150 M_IPSBUF, M_WAITOK); 151 if(copyin(user_request->command_buffer, 152 ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))){ 153 free(ioctl_cmd->command_buffer, M_IPSBUF); 154 free(ioctl_cmd, M_IPSBUF); 155 break; 156 } 157 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE; 158 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE; 159 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request); 160 free(ioctl_cmd->command_buffer, M_IPSBUF); 161 free(ioctl_cmd, M_IPSBUF); 162 break; 163 } 164 165 return error; 166} 167