ips_ioctl.c revision 331722 
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: stable/11/sys/dev/ips/ips_ioctl.c 331722 2018-03-29 02:50:57Z eadler $");
30
31#include <dev/ips/ipsreg.h>
32#include <dev/ips/ips.h>
33#include <dev/ips/ips_ioctl.h>
34
35static void ips_ioctl_finish(ips_command_t *command)
36{
37	ips_ioctl_t *ioctl_cmd = command->arg;
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
52static void ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,int segnum, int error)
53{
54	ips_command_t *command = cmdptr;
55	ips_ioctl_t *ioctl_cmd = command->arg;
56	ips_generic_cmd *command_buffer = command->command_buffer;
57	if(error){
58		ips_set_error(command, error);
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))
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;
134	mtx_lock(&sc->queue_mtx);
135	ips_insert_free_cmd(sc, command);
136	mtx_unlock(&sc->queue_mtx);
137
138exit:	bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
139			ioctl_cmd->dmamap);
140	bus_dma_tag_destroy(ioctl_cmd->dmatag);
141	return error;
142}
143
144
145int ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr, int32_t flags){
146	int error = EINVAL;
147	ips_ioctl_t *ioctl_cmd;
148	ips_user_request *user_request;
149	switch(ioctl_request){
150	case IPS_USER_CMD:
151		user_request = (ips_user_request *)addr;
152		ioctl_cmd = malloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK);
153		ioctl_cmd->command_buffer = malloc(sizeof(ips_generic_cmd),
154						M_IPSBUF, M_WAITOK);
155		if(copyin(user_request->command_buffer,
156		    ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))){
157			free(ioctl_cmd->command_buffer, M_IPSBUF);
158			free(ioctl_cmd, M_IPSBUF);
159			break;
160		}
161		ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
162		ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
163		error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
164		free(ioctl_cmd->command_buffer, M_IPSBUF);
165		free(ioctl_cmd, M_IPSBUF);
166		break;
167	}
168
169	return error;
170}
171