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
ips_ioctl_finish(ips_command_t * command)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
ips_ioctl_callback(void * cmdptr,bus_dma_segment_t * segments,int segnum,int error)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
ips_ioctl_start(ips_command_t * command)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
ips_ioctl_cmd(ips_softc_t * sc,ips_ioctl_t * ioctl_cmd,ips_user_request * user_request)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 /* maxsize */ ioctl_cmd->datasize,
110 /* numsegs */ 1,
111 /* maxsegsize*/ ioctl_cmd->datasize,
112 /* flags */ 0,
113 &ioctl_cmd->dmatag) != 0) {
114 return ENOMEM;
115 }
116 if (bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer,
117 0, &ioctl_cmd->dmamap)) {
118 error = ENOMEM;
119 goto exit;
120 }
121 if (copyin(user_request->data_buffer, ioctl_cmd->data_buffer,
122 ioctl_cmd->datasize))
123 goto exit;
124 ioctl_cmd->status.value = 0xffffffff;
125 lockmgr(&sc->queue_lock, LK_EXCLUSIVE|LK_RETRY);
126 if ((error = ips_get_free_cmd(sc, &command, 0)) > 0) {
127 error = ENOMEM;
128 lockmgr(&sc->queue_lock, LK_RELEASE);
129 goto exit;
130 }
131 command->arg = ioctl_cmd;
132 ips_ioctl_start(command);
133 while (ioctl_cmd->status.value == 0xffffffff)
134 tsleep(ioctl_cmd, 0, "ips", hz / 10);
135 if (COMMAND_ERROR(&ioctl_cmd->status))
136 error = EIO;
137 else
138 error = 0;
139 lockmgr(&sc->queue_lock, LK_RELEASE);
140
141 if (copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
142 ioctl_cmd->datasize))
143 error = EINVAL;
144 exit:
145 bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
146 ioctl_cmd->dmamap);
147 bus_dma_tag_destroy(ioctl_cmd->dmatag);
148 return error;
149 }
150
151 int
ips_ioctl_request(ips_softc_t * sc,u_long ioctl_request,caddr_t addr,int32_t flags)152 ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr,
153 int32_t flags)
154 {
155 ips_ioctl_t *ioctl_cmd;
156 ips_user_request *user_request;
157 int error = EINVAL;
158
159 switch (ioctl_request) {
160 case IPS_USER_CMD:
161 user_request = (ips_user_request *)addr;
162 ioctl_cmd = kmalloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK);
163 ioctl_cmd->command_buffer = kmalloc(sizeof(ips_generic_cmd),
164 M_IPSBUF, M_WAITOK);
165 if (copyin(user_request->command_buffer,
166 ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))) {
167 kfree(ioctl_cmd->command_buffer, M_IPSBUF);
168 kfree(ioctl_cmd, M_IPSBUF);
169 break;
170 }
171 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
172 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
173 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
174 kfree(ioctl_cmd->command_buffer, M_IPSBUF);
175 kfree(ioctl_cmd, M_IPSBUF);
176 break;
177 }
178 return error;
179 }
180