ips_ioctl.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Written by: David Jeffery
5 * Copyright (c) 2002 Adaptec Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: stable/11/sys/dev/ips/ips_ioctl.c 330897 2018-03-14 03:19:51Z eadler $");
32
33#include <dev/ips/ipsreg.h>
34#include <dev/ips/ips.h>
35#include <dev/ips/ips_ioctl.h>
36
37static void ips_ioctl_finish(ips_command_t *command)
38{
39	ips_ioctl_t *ioctl_cmd = command->arg;
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
54static void ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,int segnum, int error)
55{
56	ips_command_t *command = cmdptr;
57	ips_ioctl_t *ioctl_cmd = command->arg;
58	ips_generic_cmd *command_buffer = command->command_buffer;
59	if(error){
60		ips_set_error(command, error);
61		return;
62	}
63	command_buffer->id = command->id;
64	command_buffer->buffaddr = segments[0].ds_addr;
65	if(ioctl_cmd->readwrite & IPS_IOCTL_WRITE){
66		bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
67				BUS_DMASYNC_PREWRITE);
68	} else if(ioctl_cmd->readwrite & IPS_IOCTL_READ){
69		bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
70				BUS_DMASYNC_PREREAD);
71	}
72	bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap,
73			BUS_DMASYNC_PREWRITE);
74	command->sc->ips_issue_cmd(command);
75}
76static int ips_ioctl_start(ips_command_t *command)
77{
78	ips_ioctl_t *ioctl_cmd = command->arg;
79	memcpy(command->command_buffer, ioctl_cmd->command_buffer,
80		sizeof(ips_generic_cmd));
81	command->callback = ips_ioctl_finish;
82	bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
83			ioctl_cmd->data_buffer,ioctl_cmd->datasize,
84			ips_ioctl_callback, command, 0);
85	return 0;
86}
87
88static int ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd, ips_user_request *user_request)
89{
90	ips_command_t *command;
91	int error = EINVAL;
92
93	if (bus_dma_tag_create(	/* parent    */	sc->adapter_dmatag,
94			/* alignment */	1,
95			/* boundary  */	0,
96			/* lowaddr   */	BUS_SPACE_MAXADDR_32BIT,
97			/* highaddr  */	BUS_SPACE_MAXADDR,
98			/* filter    */	NULL,
99			/* filterarg */	NULL,
100			/* maxsize   */	ioctl_cmd->datasize,
101			/* numsegs   */	1,
102			/* maxsegsize*/	ioctl_cmd->datasize,
103			/* flags     */	0,
104			/* lockfunc  */ NULL,
105			/* lockarg   */ NULL,
106			&ioctl_cmd->dmatag) != 0) {
107		return ENOMEM;
108        }
109	if(bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer,
110	   0, &ioctl_cmd->dmamap)){
111		error = ENOMEM;
112		goto exit;
113	}
114	if(copyin(user_request->data_buffer,ioctl_cmd->data_buffer,
115	    ioctl_cmd->datasize))
116		goto exit;
117	ioctl_cmd->status.value = 0xffffffff;
118	mtx_lock(&sc->queue_mtx);
119	if((error = ips_get_free_cmd(sc, &command, 0)) > 0){
120		error = ENOMEM;
121		mtx_unlock(&sc->queue_mtx);
122		goto exit;
123	}
124	command->arg = ioctl_cmd;
125	ips_ioctl_start(command);
126	while( ioctl_cmd->status.value == 0xffffffff)
127		msleep(ioctl_cmd, &sc->queue_mtx, 0, "ips", hz/10);
128	if(COMMAND_ERROR(ioctl_cmd))
129		error = EIO;
130	else
131		error = 0;
132	mtx_unlock(&sc->queue_mtx);
133	if(copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
134	    ioctl_cmd->datasize))
135		error = EINVAL;
136	mtx_lock(&sc->queue_mtx);
137	ips_insert_free_cmd(sc, command);
138	mtx_unlock(&sc->queue_mtx);
139
140exit:	bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
141			ioctl_cmd->dmamap);
142	bus_dma_tag_destroy(ioctl_cmd->dmatag);
143	return error;
144}
145
146
147int ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr, int32_t flags){
148	int error = EINVAL;
149	ips_ioctl_t *ioctl_cmd;
150	ips_user_request *user_request;
151	switch(ioctl_request){
152	case IPS_USER_CMD:
153		user_request = (ips_user_request *)addr;
154		ioctl_cmd = malloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK);
155		ioctl_cmd->command_buffer = malloc(sizeof(ips_generic_cmd),
156						M_IPSBUF, M_WAITOK);
157		if(copyin(user_request->command_buffer,
158		    ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))){
159			free(ioctl_cmd->command_buffer, M_IPSBUF);
160			free(ioctl_cmd, M_IPSBUF);
161			break;
162		}
163		ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
164		ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
165		error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
166		free(ioctl_cmd->command_buffer, M_IPSBUF);
167		free(ioctl_cmd, M_IPSBUF);
168		break;
169	}
170
171	return error;
172}
173