1 | /* $NetBSD: scsi_base.c,v 1.91 2016/11/20 15:37:19 mlelstv Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Charles M. Hannum. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #include <sys/cdefs.h> |
33 | __KERNEL_RCSID(0, "$NetBSD: scsi_base.c,v 1.91 2016/11/20 15:37:19 mlelstv Exp $" ); |
34 | |
35 | #include <sys/param.h> |
36 | #include <sys/systm.h> |
37 | #include <sys/kernel.h> |
38 | #include <sys/buf.h> |
39 | #include <sys/uio.h> |
40 | #include <sys/malloc.h> |
41 | #include <sys/errno.h> |
42 | #include <sys/device.h> |
43 | #include <sys/proc.h> |
44 | |
45 | #include <dev/scsipi/scsipi_all.h> |
46 | #include <dev/scsipi/scsi_all.h> |
47 | #include <dev/scsipi/scsi_disk.h> |
48 | #include <dev/scsipi/scsiconf.h> |
49 | #include <dev/scsipi/scsipi_base.h> |
50 | |
51 | static void scsi_print_xfer_mode(struct scsipi_periph *); |
52 | /* |
53 | * Do a scsi operation, asking a device to run as SCSI-II if it can. |
54 | */ |
55 | int |
56 | scsi_change_def(struct scsipi_periph *periph, int flags) |
57 | { |
58 | struct scsi_changedef cmd; |
59 | |
60 | memset(&cmd, 0, sizeof(cmd)); |
61 | cmd.opcode = SCSI_CHANGE_DEFINITION; |
62 | cmd.how = SC_SCSI_2; |
63 | |
64 | return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0, |
65 | SCSIPIRETRIES, 100000, NULL, flags)); |
66 | } |
67 | |
68 | /* |
69 | * ask the scsi driver to perform a command for us. |
70 | * tell it where to read/write the data, and how |
71 | * long the data is supposed to be. If we have a buf |
72 | * to associate with the transfer, we need that too. |
73 | */ |
74 | void |
75 | scsi_scsipi_cmd(struct scsipi_xfer *xs) |
76 | { |
77 | struct scsipi_periph *periph = xs->xs_periph; |
78 | |
79 | SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n" )); |
80 | |
81 | /* |
82 | * Set the LUN in the CDB if we have an older device. We also |
83 | * set it for more modern SCSI-2 devices "just in case". |
84 | */ |
85 | if (periph->periph_version <= 2) |
86 | xs->cmd->bytes[0] |= |
87 | ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) & |
88 | SCSI_CMD_LUN_MASK); |
89 | } |
90 | |
91 | /* |
92 | * Utility routines often used in SCSI stuff |
93 | */ |
94 | |
95 | /* |
96 | * Print out the periph's address info. |
97 | */ |
98 | void |
99 | scsi_print_addr(struct scsipi_periph *periph) |
100 | { |
101 | struct scsipi_channel *chan = periph->periph_channel; |
102 | struct scsipi_adapter *adapt = chan->chan_adapter; |
103 | |
104 | printf("%s(%s:%d:%d:%d): " , periph->periph_dev != NULL ? |
105 | device_xname(periph->periph_dev) : "probe" , |
106 | device_xname(adapt->adapt_dev), |
107 | chan->chan_channel, periph->periph_target, |
108 | periph->periph_lun); |
109 | } |
110 | |
111 | /* |
112 | * Kill off all pending xfers for a periph. |
113 | * |
114 | * Must be called with channel lock held |
115 | */ |
116 | void |
117 | scsi_kill_pending(struct scsipi_periph *periph) |
118 | { |
119 | } |
120 | |
121 | /* |
122 | * scsi_print_xfer_mode: |
123 | * |
124 | * Print a parallel SCSI periph's capabilities. |
125 | */ |
126 | static void |
127 | scsi_print_xfer_mode(struct scsipi_periph *periph) |
128 | { |
129 | int period, freq, speed, mbs; |
130 | |
131 | aprint_normal_dev(periph->periph_dev, "" ); |
132 | if (periph->periph_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_DT)) { |
133 | period = scsipi_sync_factor_to_period(periph->periph_period); |
134 | aprint_normal("sync (%d.%02dns offset %d)" , |
135 | period / 100, period % 100, periph->periph_offset); |
136 | } else |
137 | aprint_normal("async" ); |
138 | |
139 | if (periph->periph_mode & PERIPH_CAP_WIDE32) |
140 | aprint_normal(", 32-bit" ); |
141 | else if (periph->periph_mode & (PERIPH_CAP_WIDE16 | PERIPH_CAP_DT)) |
142 | aprint_normal(", 16-bit" ); |
143 | else |
144 | aprint_normal(", 8-bit" ); |
145 | |
146 | if (periph->periph_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_DT)) { |
147 | freq = scsipi_sync_factor_to_freq(periph->periph_period); |
148 | speed = freq; |
149 | if (periph->periph_mode & PERIPH_CAP_WIDE32) |
150 | speed *= 4; |
151 | else if (periph->periph_mode & |
152 | (PERIPH_CAP_WIDE16 | PERIPH_CAP_DT)) |
153 | speed *= 2; |
154 | mbs = speed / 1000; |
155 | if (mbs > 0) { |
156 | aprint_normal(" (%d.%03dMB/s)" , mbs, |
157 | speed % 1000); |
158 | } else |
159 | aprint_normal(" (%dKB/s)" , speed % 1000); |
160 | } |
161 | |
162 | aprint_normal(" transfers" ); |
163 | |
164 | if (periph->periph_mode & PERIPH_CAP_TQING) |
165 | aprint_normal(", tagged queueing" ); |
166 | |
167 | aprint_normal("\n" ); |
168 | } |
169 | |
170 | /* |
171 | * scsi_async_event_xfer_mode: |
172 | * |
173 | * Update the xfer mode for all parallel SCSI periphs sharing the |
174 | * specified I_T Nexus. |
175 | */ |
176 | void |
177 | scsi_async_event_xfer_mode(struct scsipi_channel *chan, void *arg) |
178 | { |
179 | struct scsipi_xfer_mode *xm = arg; |
180 | struct scsipi_periph *periph; |
181 | int lun, announce, mode, period, offset; |
182 | |
183 | for (lun = 0; lun < chan->chan_nluns; lun++) { |
184 | periph = scsipi_lookup_periph_locked(chan, xm->xm_target, lun); |
185 | if (periph == NULL) |
186 | continue; |
187 | announce = 0; |
188 | |
189 | /* |
190 | * Clamp the xfer mode down to this periph's capabilities. |
191 | */ |
192 | mode = xm->xm_mode & periph->periph_cap; |
193 | if (mode & PERIPH_CAP_SYNC) { |
194 | period = xm->xm_period; |
195 | offset = xm->xm_offset; |
196 | } else { |
197 | period = 0; |
198 | offset = 0; |
199 | } |
200 | |
201 | /* |
202 | * If we do not have a valid xfer mode yet, or the parameters |
203 | * are different, announce them. |
204 | */ |
205 | if ((periph->periph_flags & PERIPH_MODE_VALID) == 0 || |
206 | periph->periph_mode != mode || |
207 | periph->periph_period != period || |
208 | periph->periph_offset != offset) |
209 | announce = 1; |
210 | |
211 | periph->periph_mode = mode; |
212 | periph->periph_period = period; |
213 | periph->periph_offset = offset; |
214 | periph->periph_flags |= PERIPH_MODE_VALID; |
215 | |
216 | if (announce) |
217 | scsi_print_xfer_mode(periph); |
218 | } |
219 | } |
220 | |
221 | /* |
222 | * scsipi_async_event_xfer_mode: |
223 | * |
224 | * Update the xfer mode for all SAS/FC periphs sharing the |
225 | * specified I_T Nexus. |
226 | */ |
227 | void |
228 | scsi_fc_sas_async_event_xfer_mode(struct scsipi_channel *chan, void *arg) |
229 | { |
230 | struct scsipi_xfer_mode *xm = arg; |
231 | struct scsipi_periph *periph; |
232 | int lun, announce, mode; |
233 | |
234 | for (lun = 0; lun < chan->chan_nluns; lun++) { |
235 | periph = scsipi_lookup_periph_locked(chan, xm->xm_target, lun); |
236 | if (periph == NULL) |
237 | continue; |
238 | announce = 0; |
239 | |
240 | /* |
241 | * Clamp the xfer mode down to this periph's capabilities. |
242 | */ |
243 | mode = xm->xm_mode & periph->periph_cap; |
244 | /* |
245 | * If we do not have a valid xfer mode yet, or the parameters |
246 | * are different, announce them. |
247 | */ |
248 | if ((periph->periph_flags & PERIPH_MODE_VALID) == 0 || |
249 | periph->periph_mode != mode) |
250 | announce = 1; |
251 | |
252 | periph->periph_mode = mode; |
253 | periph->periph_flags |= PERIPH_MODE_VALID; |
254 | |
255 | if (announce && |
256 | (periph->periph_mode & PERIPH_CAP_TQING) != 0) { |
257 | aprint_normal_dev(periph->periph_dev, |
258 | "tagged queueing\n" ); |
259 | } |
260 | } |
261 | } |
262 | |