Commit | Line | Data |
---|---|---|
f931551b | 1 | /* |
7fac3301 MM |
2 | * Copyright (c) 2012 Intel Corporation. All rights reserved. |
3 | * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved. | |
f931551b RC |
4 | * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. |
5 | * | |
6 | * This software is available to you under a choice of one of two | |
7 | * licenses. You may choose to be licensed under the terms of the GNU | |
8 | * General Public License (GPL) Version 2, available from the file | |
9 | * COPYING in the main directory of this source tree, or the | |
10 | * OpenIB.org BSD license below: | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or | |
13 | * without modification, are permitted provided that the following | |
14 | * conditions are met: | |
15 | * | |
16 | * - Redistributions of source code must retain the above | |
17 | * copyright notice, this list of conditions and the following | |
18 | * disclaimer. | |
19 | * | |
20 | * - Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials | |
23 | * provided with the distribution. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
32 | * SOFTWARE. | |
33 | */ | |
34 | ||
35 | #include <linux/delay.h> | |
36 | #include <linux/pci.h> | |
37 | #include <linux/vmalloc.h> | |
38 | ||
39 | #include "qib.h" | |
40 | ||
41 | /* | |
42 | * Functions specific to the serial EEPROM on cards handled by ib_qib. | |
43 | * The actual serail interface code is in qib_twsi.c. This file is a client | |
44 | */ | |
45 | ||
46 | /** | |
47 | * qib_eeprom_read - receives bytes from the eeprom via I2C | |
48 | * @dd: the qlogic_ib device | |
49 | * @eeprom_offset: address to read from | |
50 | * @buffer: where to store result | |
51 | * @len: number of bytes to receive | |
52 | */ | |
53 | int qib_eeprom_read(struct qib_devdata *dd, u8 eeprom_offset, | |
54 | void *buff, int len) | |
55 | { | |
56 | int ret; | |
57 | ||
58 | ret = mutex_lock_interruptible(&dd->eep_lock); | |
59 | if (!ret) { | |
60 | ret = qib_twsi_reset(dd); | |
61 | if (ret) | |
62 | qib_dev_err(dd, "EEPROM Reset for read failed\n"); | |
63 | else | |
64 | ret = qib_twsi_blk_rd(dd, dd->twsi_eeprom_dev, | |
65 | eeprom_offset, buff, len); | |
66 | mutex_unlock(&dd->eep_lock); | |
67 | } | |
68 | ||
69 | return ret; | |
70 | } | |
71 | ||
72 | /* | |
73 | * Actually update the eeprom, first doing write enable if | |
74 | * needed, then restoring write enable state. | |
75 | * Must be called with eep_lock held | |
76 | */ | |
77 | static int eeprom_write_with_enable(struct qib_devdata *dd, u8 offset, | |
78 | const void *buf, int len) | |
79 | { | |
80 | int ret, pwen; | |
81 | ||
82 | pwen = dd->f_eeprom_wen(dd, 1); | |
83 | ret = qib_twsi_reset(dd); | |
84 | if (ret) | |
85 | qib_dev_err(dd, "EEPROM Reset for write failed\n"); | |
86 | else | |
87 | ret = qib_twsi_blk_wr(dd, dd->twsi_eeprom_dev, | |
88 | offset, buf, len); | |
89 | dd->f_eeprom_wen(dd, pwen); | |
90 | return ret; | |
91 | } | |
92 | ||
93 | /** | |
94 | * qib_eeprom_write - writes data to the eeprom via I2C | |
95 | * @dd: the qlogic_ib device | |
96 | * @eeprom_offset: where to place data | |
97 | * @buffer: data to write | |
98 | * @len: number of bytes to write | |
99 | */ | |
100 | int qib_eeprom_write(struct qib_devdata *dd, u8 eeprom_offset, | |
101 | const void *buff, int len) | |
102 | { | |
103 | int ret; | |
104 | ||
105 | ret = mutex_lock_interruptible(&dd->eep_lock); | |
106 | if (!ret) { | |
107 | ret = eeprom_write_with_enable(dd, eeprom_offset, buff, len); | |
108 | mutex_unlock(&dd->eep_lock); | |
109 | } | |
110 | ||
111 | return ret; | |
112 | } | |
113 | ||
114 | static u8 flash_csum(struct qib_flash *ifp, int adjust) | |
115 | { | |
116 | u8 *ip = (u8 *) ifp; | |
117 | u8 csum = 0, len; | |
118 | ||
119 | /* | |
120 | * Limit length checksummed to max length of actual data. | |
121 | * Checksum of erased eeprom will still be bad, but we avoid | |
122 | * reading past the end of the buffer we were passed. | |
123 | */ | |
124 | len = ifp->if_length; | |
125 | if (len > sizeof(struct qib_flash)) | |
126 | len = sizeof(struct qib_flash); | |
127 | while (len--) | |
128 | csum += *ip++; | |
129 | csum -= ifp->if_csum; | |
130 | csum = ~csum; | |
131 | if (adjust) | |
132 | ifp->if_csum = csum; | |
133 | ||
134 | return csum; | |
135 | } | |
136 | ||
137 | /** | |
138 | * qib_get_eeprom_info- get the GUID et al. from the TSWI EEPROM device | |
139 | * @dd: the qlogic_ib device | |
140 | * | |
141 | * We have the capability to use the nguid field, and get | |
142 | * the guid from the first chip's flash, to use for all of them. | |
143 | */ | |
144 | void qib_get_eeprom_info(struct qib_devdata *dd) | |
145 | { | |
146 | void *buf; | |
147 | struct qib_flash *ifp; | |
148 | __be64 guid; | |
149 | int len, eep_stat; | |
150 | u8 csum, *bguid; | |
151 | int t = dd->unit; | |
152 | struct qib_devdata *dd0 = qib_lookup(0); | |
153 | ||
154 | if (t && dd0->nguid > 1 && t <= dd0->nguid) { | |
155 | u8 oguid; | |
da12c1f6 | 156 | |
f931551b RC |
157 | dd->base_guid = dd0->base_guid; |
158 | bguid = (u8 *) &dd->base_guid; | |
159 | ||
160 | oguid = bguid[7]; | |
161 | bguid[7] += t; | |
162 | if (oguid > bguid[7]) { | |
163 | if (bguid[6] == 0xff) { | |
164 | if (bguid[5] == 0xff) { | |
7fac3301 MM |
165 | qib_dev_err(dd, |
166 | "Can't set %s GUID from base, wraps to OUI!\n", | |
167 | qib_get_unit_name(t)); | |
f931551b RC |
168 | dd->base_guid = 0; |
169 | goto bail; | |
170 | } | |
171 | bguid[5]++; | |
172 | } | |
173 | bguid[6]++; | |
174 | } | |
175 | dd->nguid = 1; | |
176 | goto bail; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Read full flash, not just currently used part, since it may have | |
181 | * been written with a newer definition. | |
182 | * */ | |
183 | len = sizeof(struct qib_flash); | |
184 | buf = vmalloc(len); | |
185 | if (!buf) { | |
7fac3301 MM |
186 | qib_dev_err(dd, |
187 | "Couldn't allocate memory to read %u bytes from eeprom for GUID\n", | |
188 | len); | |
f931551b RC |
189 | goto bail; |
190 | } | |
191 | ||
192 | /* | |
193 | * Use "public" eeprom read function, which does locking and | |
194 | * figures out device. This will migrate to chip-specific. | |
195 | */ | |
196 | eep_stat = qib_eeprom_read(dd, 0, buf, len); | |
197 | ||
198 | if (eep_stat) { | |
199 | qib_dev_err(dd, "Failed reading GUID from eeprom\n"); | |
200 | goto done; | |
201 | } | |
202 | ifp = (struct qib_flash *)buf; | |
203 | ||
204 | csum = flash_csum(ifp, 0); | |
205 | if (csum != ifp->if_csum) { | |
7fac3301 MM |
206 | qib_devinfo(dd->pcidev, |
207 | "Bad I2C flash checksum: 0x%x, not 0x%x\n", | |
208 | csum, ifp->if_csum); | |
f931551b RC |
209 | goto done; |
210 | } | |
211 | if (*(__be64 *) ifp->if_guid == cpu_to_be64(0) || | |
212 | *(__be64 *) ifp->if_guid == ~cpu_to_be64(0)) { | |
7fac3301 MM |
213 | qib_dev_err(dd, |
214 | "Invalid GUID %llx from flash; ignoring\n", | |
215 | *(unsigned long long *) ifp->if_guid); | |
f931551b RC |
216 | /* don't allow GUID if all 0 or all 1's */ |
217 | goto done; | |
218 | } | |
219 | ||
220 | /* complain, but allow it */ | |
221 | if (*(u64 *) ifp->if_guid == 0x100007511000000ULL) | |
7fac3301 MM |
222 | qib_devinfo(dd->pcidev, |
223 | "Warning, GUID %llx is default, probably not correct!\n", | |
224 | *(unsigned long long *) ifp->if_guid); | |
f931551b RC |
225 | |
226 | bguid = ifp->if_guid; | |
227 | if (!bguid[0] && !bguid[1] && !bguid[2]) { | |
228 | /* | |
229 | * Original incorrect GUID format in flash; fix in | |
230 | * core copy, by shifting up 2 octets; don't need to | |
231 | * change top octet, since both it and shifted are 0. | |
232 | */ | |
233 | bguid[1] = bguid[3]; | |
234 | bguid[2] = bguid[4]; | |
235 | bguid[3] = 0; | |
236 | bguid[4] = 0; | |
237 | guid = *(__be64 *) ifp->if_guid; | |
238 | } else | |
239 | guid = *(__be64 *) ifp->if_guid; | |
240 | dd->base_guid = guid; | |
241 | dd->nguid = ifp->if_numguid; | |
242 | /* | |
243 | * Things are slightly complicated by the desire to transparently | |
244 | * support both the Pathscale 10-digit serial number and the QLogic | |
245 | * 13-character version. | |
246 | */ | |
247 | if ((ifp->if_fversion > 1) && ifp->if_sprefix[0] && | |
248 | ((u8 *) ifp->if_sprefix)[0] != 0xFF) { | |
249 | char *snp = dd->serial; | |
250 | ||
251 | /* | |
252 | * This board has a Serial-prefix, which is stored | |
253 | * elsewhere for backward-compatibility. | |
254 | */ | |
041af0bb MM |
255 | memcpy(snp, ifp->if_sprefix, sizeof(ifp->if_sprefix)); |
256 | snp[sizeof(ifp->if_sprefix)] = '\0'; | |
f931551b RC |
257 | len = strlen(snp); |
258 | snp += len; | |
041af0bb MM |
259 | len = sizeof(dd->serial) - len; |
260 | if (len > sizeof(ifp->if_serial)) | |
261 | len = sizeof(ifp->if_serial); | |
f931551b | 262 | memcpy(snp, ifp->if_serial, len); |
a46a2802 MM |
263 | } else { |
264 | memcpy(dd->serial, ifp->if_serial, sizeof(ifp->if_serial)); | |
265 | } | |
f931551b | 266 | if (!strstr(ifp->if_comment, "Tested successfully")) |
7fac3301 MM |
267 | qib_dev_err(dd, |
268 | "Board SN %s did not pass functional test: %s\n", | |
269 | dd->serial, ifp->if_comment); | |
f931551b | 270 | |
f931551b RC |
271 | done: |
272 | vfree(buf); | |
273 | ||
274 | bail:; | |
275 | } | |
276 |