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block: Fix a NULL pointer dereference in generic_make_request()
[linux/fpc-iii.git] / block / sed-opal.c
blob1196408972937cf306139faa2ed188fb187e777d
1 /*
2 * Copyright © 2016 Intel Corporation
3 *
4 * Authors:
5 * Scott Bauer <scott.bauer@intel.com>
6 * Rafael Antognolli <rafael.antognolli@intel.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions of the GNU General Public License,
10 * version 2, as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 */
17
18 #define pr_fmt(fmt) KBUILD_MODNAME ":OPAL: " fmt
19
20 #include <linux/delay.h>
21 #include <linux/device.h>
22 #include <linux/kernel.h>
23 #include <linux/list.h>
24 #include <linux/genhd.h>
25 #include <linux/slab.h>
26 #include <linux/uaccess.h>
27 #include <uapi/linux/sed-opal.h>
28 #include <linux/sed-opal.h>
29 #include <linux/string.h>
30 #include <linux/kdev_t.h>
31
32 #include "opal_proto.h"
33
34 #define IO_BUFFER_LENGTH 2048
35 #define MAX_TOKS 64
36
37 struct opal_step {
38 int (*fn)(struct opal_dev *dev, void *data);
39 void *data;
40 };
41 typedef int (cont_fn)(struct opal_dev *dev);
42
43 enum opal_atom_width {
44 OPAL_WIDTH_TINY,
45 OPAL_WIDTH_SHORT,
46 OPAL_WIDTH_MEDIUM,
47 OPAL_WIDTH_LONG,
48 OPAL_WIDTH_TOKEN
49 };
50
51 /*
52 * On the parsed response, we don't store again the toks that are already
53 * stored in the response buffer. Instead, for each token, we just store a
54 * pointer to the position in the buffer where the token starts, and the size
55 * of the token in bytes.
56 */
57 struct opal_resp_tok {
58 const u8 *pos;
59 size_t len;
60 enum opal_response_token type;
61 enum opal_atom_width width;
62 union {
63 u64 u;
64 s64 s;
65 } stored;
66 };
67
68 /*
69 * From the response header it's not possible to know how many tokens there are
70 * on the payload. So we hardcode that the maximum will be MAX_TOKS, and later
71 * if we start dealing with messages that have more than that, we can increase
72 * this number. This is done to avoid having to make two passes through the
73 * response, the first one counting how many tokens we have and the second one
74 * actually storing the positions.
75 */
76 struct parsed_resp {
77 int num;
78 struct opal_resp_tok toks[MAX_TOKS];
79 };
80
81 struct opal_dev {
82 bool supported;
83 bool mbr_enabled;
84
85 void *data;
86 sec_send_recv *send_recv;
87
88 const struct opal_step *steps;
89 struct mutex dev_lock;
90 u16 comid;
91 u32 hsn;
92 u32 tsn;
93 u64 align;
94 u64 lowest_lba;
95
96 size_t pos;
97 u8 cmd[IO_BUFFER_LENGTH];
98 u8 resp[IO_BUFFER_LENGTH];
99
100 struct parsed_resp parsed;
101 size_t prev_d_len;
102 void *prev_data;
103
104 struct list_head unlk_lst;
105 };
106
107
108 static const u8 opaluid[][OPAL_UID_LENGTH] = {
109 /* users */
110 [OPAL_SMUID_UID] =
111 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff },
112 [OPAL_THISSP_UID] =
113 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 },
114 [OPAL_ADMINSP_UID] =
115 { 0x00, 0x00, 0x02, 0x05, 0x00, 0x00, 0x00, 0x01 },
116 [OPAL_LOCKINGSP_UID] =
117 { 0x00, 0x00, 0x02, 0x05, 0x00, 0x00, 0x00, 0x02 },
118 [OPAL_ENTERPRISE_LOCKINGSP_UID] =
119 { 0x00, 0x00, 0x02, 0x05, 0x00, 0x01, 0x00, 0x01 },
120 [OPAL_ANYBODY_UID] =
121 { 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x01 },
122 [OPAL_SID_UID] =
123 { 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x06 },
124 [OPAL_ADMIN1_UID] =
125 { 0x00, 0x00, 0x00, 0x09, 0x00, 0x01, 0x00, 0x01 },
126 [OPAL_USER1_UID] =
127 { 0x00, 0x00, 0x00, 0x09, 0x00, 0x03, 0x00, 0x01 },
128 [OPAL_USER2_UID] =
129 { 0x00, 0x00, 0x00, 0x09, 0x00, 0x03, 0x00, 0x02 },
130 [OPAL_PSID_UID] =
131 { 0x00, 0x00, 0x00, 0x09, 0x00, 0x01, 0xff, 0x01 },
132 [OPAL_ENTERPRISE_BANDMASTER0_UID] =
133 { 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x80, 0x01 },
134 [OPAL_ENTERPRISE_ERASEMASTER_UID] =
135 { 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x84, 0x01 },
136
137 /* tables */
138
139 [OPAL_LOCKINGRANGE_GLOBAL] =
140 { 0x00, 0x00, 0x08, 0x02, 0x00, 0x00, 0x00, 0x01 },
141 [OPAL_LOCKINGRANGE_ACE_RDLOCKED] =
142 { 0x00, 0x00, 0x00, 0x08, 0x00, 0x03, 0xE0, 0x01 },
143 [OPAL_LOCKINGRANGE_ACE_WRLOCKED] =
144 { 0x00, 0x00, 0x00, 0x08, 0x00, 0x03, 0xE8, 0x01 },
145 [OPAL_MBRCONTROL] =
146 { 0x00, 0x00, 0x08, 0x03, 0x00, 0x00, 0x00, 0x01 },
147 [OPAL_MBR] =
148 { 0x00, 0x00, 0x08, 0x04, 0x00, 0x00, 0x00, 0x00 },
149 [OPAL_AUTHORITY_TABLE] =
150 { 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x00},
151 [OPAL_C_PIN_TABLE] =
152 { 0x00, 0x00, 0x00, 0x0B, 0x00, 0x00, 0x00, 0x00},
153 [OPAL_LOCKING_INFO_TABLE] =
154 { 0x00, 0x00, 0x08, 0x01, 0x00, 0x00, 0x00, 0x01 },
155 [OPAL_ENTERPRISE_LOCKING_INFO_TABLE] =
156 { 0x00, 0x00, 0x08, 0x01, 0x00, 0x00, 0x00, 0x00 },
157
158 /* C_PIN_TABLE object ID's */
159
160 [OPAL_C_PIN_MSID] =
161 { 0x00, 0x00, 0x00, 0x0B, 0x00, 0x00, 0x84, 0x02},
162 [OPAL_C_PIN_SID] =
163 { 0x00, 0x00, 0x00, 0x0B, 0x00, 0x00, 0x00, 0x01},
164 [OPAL_C_PIN_ADMIN1] =
165 { 0x00, 0x00, 0x00, 0x0B, 0x00, 0x01, 0x00, 0x01},
166
167 /* half UID's (only first 4 bytes used) */
168
169 [OPAL_HALF_UID_AUTHORITY_OBJ_REF] =
170 { 0x00, 0x00, 0x0C, 0x05, 0xff, 0xff, 0xff, 0xff },
171 [OPAL_HALF_UID_BOOLEAN_ACE] =
172 { 0x00, 0x00, 0x04, 0x0E, 0xff, 0xff, 0xff, 0xff },
173
174 /* special value for omitted optional parameter */
175 [OPAL_UID_HEXFF] =
176 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
177 };
178
179 /*
180 * TCG Storage SSC Methods.
181 * Derived from: TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
182 * Section: 6.3 Assigned UIDs
183 */
184 static const u8 opalmethod[][OPAL_UID_LENGTH] = {
185 [OPAL_PROPERTIES] =
186 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x01 },
187 [OPAL_STARTSESSION] =
188 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x02 },
189 [OPAL_REVERT] =
190 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x02, 0x02 },
191 [OPAL_ACTIVATE] =
192 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x02, 0x03 },
193 [OPAL_EGET] =
194 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x06 },
195 [OPAL_ESET] =
196 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x07 },
197 [OPAL_NEXT] =
198 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x08 },
199 [OPAL_EAUTHENTICATE] =
200 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x0c },
201 [OPAL_GETACL] =
202 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x0d },
203 [OPAL_GENKEY] =
204 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x10 },
205 [OPAL_REVERTSP] =
206 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x11 },
207 [OPAL_GET] =
208 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x16 },
209 [OPAL_SET] =
210 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x17 },
211 [OPAL_AUTHENTICATE] =
212 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x1c },
213 [OPAL_RANDOM] =
214 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x01 },
215 [OPAL_ERASE] =
216 { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x08, 0x03 },
217 };
218
219 static int end_opal_session_error(struct opal_dev *dev);
220
221 struct opal_suspend_data {
222 struct opal_lock_unlock unlk;
223 u8 lr;
224 struct list_head node;
225 };
226
227 /*
228 * Derived from:
229 * TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
230 * Section: 5.1.5 Method Status Codes
231 */
232 static const char * const opal_errors[] = {
233 "Success",
234 "Not Authorized",
235 "Unknown Error",
236 "SP Busy",
237 "SP Failed",
238 "SP Disabled",
239 "SP Frozen",
240 "No Sessions Available",
241 "Uniqueness Conflict",
242 "Insufficient Space",
243 "Insufficient Rows",
244 "Invalid Function",
245 "Invalid Parameter",
246 "Invalid Reference",
247 "Unknown Error",
248 "TPER Malfunction",
249 "Transaction Failure",
250 "Response Overflow",
251 "Authority Locked Out",
252 };
253
254 static const char *opal_error_to_human(int error)
255 {
256 if (error == 0x3f)
257 return "Failed";
258
259 if (error >= ARRAY_SIZE(opal_errors) || error < 0)
260 return "Unknown Error";
261
262 return opal_errors[error];
263 }
264
265 static void print_buffer(const u8 *ptr, u32 length)
266 {
267 #ifdef DEBUG
268 print_hex_dump_bytes("OPAL: ", DUMP_PREFIX_OFFSET, ptr, length);
269 pr_debug("\n");
270 #endif
271 }
272
273 static bool check_tper(const void *data)
274 {
275 const struct d0_tper_features *tper = data;
276 u8 flags = tper->supported_features;
277
278 if (!(flags & TPER_SYNC_SUPPORTED)) {
279 pr_debug("TPer sync not supported. flags = %d\n",
280 tper->supported_features);
281 return false;
282 }
283
284 return true;
285 }
286
287 static bool check_mbrenabled(const void *data)
288 {
289 const struct d0_locking_features *lfeat = data;
290 u8 sup_feat = lfeat->supported_features;
291
292 return !!(sup_feat & MBR_ENABLED_MASK);
293 }
294
295 static bool check_sum(const void *data)
296 {
297 const struct d0_single_user_mode *sum = data;
298 u32 nlo = be32_to_cpu(sum->num_locking_objects);
299
300 if (nlo == 0) {
301 pr_debug("Need at least one locking object.\n");
302 return false;
303 }
304
305 pr_debug("Number of locking objects: %d\n", nlo);
306
307 return true;
308 }
309
310 static u16 get_comid_v100(const void *data)
311 {
312 const struct d0_opal_v100 *v100 = data;
313
314 return be16_to_cpu(v100->baseComID);
315 }
316
317 static u16 get_comid_v200(const void *data)
318 {
319 const struct d0_opal_v200 *v200 = data;
320
321 return be16_to_cpu(v200->baseComID);
322 }
323
324 static int opal_send_cmd(struct opal_dev *dev)
325 {
326 return dev->send_recv(dev->data, dev->comid, TCG_SECP_01,
327 dev->cmd, IO_BUFFER_LENGTH,
328 true);
329 }
330
331 static int opal_recv_cmd(struct opal_dev *dev)
332 {
333 return dev->send_recv(dev->data, dev->comid, TCG_SECP_01,
334 dev->resp, IO_BUFFER_LENGTH,
335 false);
336 }
337
338 static int opal_recv_check(struct opal_dev *dev)
339 {
340 size_t buflen = IO_BUFFER_LENGTH;
341 void *buffer = dev->resp;
342 struct opal_header *hdr = buffer;
343 int ret;
344
345 do {
346 pr_debug("Sent OPAL command: outstanding=%d, minTransfer=%d\n",
347 hdr->cp.outstandingData,
348 hdr->cp.minTransfer);
349
350 if (hdr->cp.outstandingData == 0 ||
351 hdr->cp.minTransfer != 0)
352 return 0;
353
354 memset(buffer, 0, buflen);
355 ret = opal_recv_cmd(dev);
356 } while (!ret);
357
358 return ret;
359 }
360
361 static int opal_send_recv(struct opal_dev *dev, cont_fn *cont)
362 {
363 int ret;
364
365 ret = opal_send_cmd(dev);
366 if (ret)
367 return ret;
368 ret = opal_recv_cmd(dev);
369 if (ret)
370 return ret;
371 ret = opal_recv_check(dev);
372 if (ret)
373 return ret;
374 return cont(dev);
375 }
376
377 static void check_geometry(struct opal_dev *dev, const void *data)
378 {
379 const struct d0_geometry_features *geo = data;
380
381 dev->align = geo->alignment_granularity;
382 dev->lowest_lba = geo->lowest_aligned_lba;
383 }
384
385 static int next(struct opal_dev *dev)
386 {
387 const struct opal_step *step;
388 int state = 0, error = 0;
389
390 do {
391 step = &dev->steps[state];
392 if (!step->fn)
393 break;
394
395 error = step->fn(dev, step->data);
396 if (error) {
397 pr_debug("Error on step function: %d with error %d: %s\n",
398 state, error,
399 opal_error_to_human(error));
400
401 /* For each OPAL command we do a discovery0 then we
402 * start some sort of session.
403 * If we haven't passed state 1 then there was an error
404 * on discovery0 or during the attempt to start a
405 * session. Therefore we shouldn't attempt to terminate
406 * a session, as one has not yet been created.
407 */
408 if (state > 1) {
409 end_opal_session_error(dev);
410 return error;
411 }
412
413 }
414 state++;
415 } while (!error);
416
417 return error;
418 }
419
420 static int opal_discovery0_end(struct opal_dev *dev)
421 {
422 bool found_com_id = false, supported = true, single_user = false;
423 const struct d0_header *hdr = (struct d0_header *)dev->resp;
424 const u8 *epos = dev->resp, *cpos = dev->resp;
425 u16 comid = 0;
426 u32 hlen = be32_to_cpu(hdr->length);
427
428 print_buffer(dev->resp, hlen);
429 dev->mbr_enabled = false;
430
431 if (hlen > IO_BUFFER_LENGTH - sizeof(*hdr)) {
432 pr_debug("Discovery length overflows buffer (%zu+%u)/%u\n",
433 sizeof(*hdr), hlen, IO_BUFFER_LENGTH);
434 return -EFAULT;
435 }
436
437 epos += hlen; /* end of buffer */
438 cpos += sizeof(*hdr); /* current position on buffer */
439
440 while (cpos < epos && supported) {
441 const struct d0_features *body =
442 (const struct d0_features *)cpos;
443
444 switch (be16_to_cpu(body->code)) {
445 case FC_TPER:
446 supported = check_tper(body->features);
447 break;
448 case FC_SINGLEUSER:
449 single_user = check_sum(body->features);
450 break;
451 case FC_GEOMETRY:
452 check_geometry(dev, body);
453 break;
454 case FC_LOCKING:
455 dev->mbr_enabled = check_mbrenabled(body->features);
456 break;
457 case FC_ENTERPRISE:
458 case FC_DATASTORE:
459 /* some ignored properties */
460 pr_debug("Found OPAL feature description: %d\n",
461 be16_to_cpu(body->code));
462 break;
463 case FC_OPALV100:
464 comid = get_comid_v100(body->features);
465 found_com_id = true;
466 break;
467 case FC_OPALV200:
468 comid = get_comid_v200(body->features);
469 found_com_id = true;
470 break;
471 case 0xbfff ... 0xffff:
472 /* vendor specific, just ignore */
473 break;
474 default:
475 pr_debug("OPAL Unknown feature: %d\n",
476 be16_to_cpu(body->code));
477
478 }
479 cpos += body->length + 4;
480 }
481
482 if (!supported) {
483 pr_debug("This device is not Opal enabled. Not Supported!\n");
484 return -EOPNOTSUPP;
485 }
486
487 if (!single_user)
488 pr_debug("Device doesn't support single user mode\n");
489
490
491 if (!found_com_id) {
492 pr_debug("Could not find OPAL comid for device. Returning early\n");
493 return -EOPNOTSUPP;
494 }
495
496 dev->comid = comid;
497
498 return 0;
499 }
500
501 static int opal_discovery0(struct opal_dev *dev, void *data)
502 {
503 int ret;
504
505 memset(dev->resp, 0, IO_BUFFER_LENGTH);
506 dev->comid = OPAL_DISCOVERY_COMID;
507 ret = opal_recv_cmd(dev);
508 if (ret)
509 return ret;
510 return opal_discovery0_end(dev);
511 }
512
513 static void add_token_u8(int *err, struct opal_dev *cmd, u8 tok)
514 {
515 if (*err)
516 return;
517 if (cmd->pos >= IO_BUFFER_LENGTH - 1) {
518 pr_debug("Error adding u8: end of buffer.\n");
519 *err = -ERANGE;
520 return;
521 }
522 cmd->cmd[cmd->pos++] = tok;
523 }
524
525 static void add_short_atom_header(struct opal_dev *cmd, bool bytestring,
526 bool has_sign, int len)
527 {
528 u8 atom;
529 int err = 0;
530
531 atom = SHORT_ATOM_ID;
532 atom |= bytestring ? SHORT_ATOM_BYTESTRING : 0;
533 atom |= has_sign ? SHORT_ATOM_SIGNED : 0;
534 atom |= len & SHORT_ATOM_LEN_MASK;
535
536 add_token_u8(&err, cmd, atom);
537 }
538
539 static void add_medium_atom_header(struct opal_dev *cmd, bool bytestring,
540 bool has_sign, int len)
541 {
542 u8 header0;
543
544 header0 = MEDIUM_ATOM_ID;
545 header0 |= bytestring ? MEDIUM_ATOM_BYTESTRING : 0;
546 header0 |= has_sign ? MEDIUM_ATOM_SIGNED : 0;
547 header0 |= (len >> 8) & MEDIUM_ATOM_LEN_MASK;
548 cmd->cmd[cmd->pos++] = header0;
549 cmd->cmd[cmd->pos++] = len;
550 }
551
552 static void add_token_u64(int *err, struct opal_dev *cmd, u64 number)
553 {
554
555 size_t len;
556 int msb;
557
558 if (!(number & ~TINY_ATOM_DATA_MASK)) {
559 add_token_u8(err, cmd, number);
560 return;
561 }
562
563 msb = fls64(number);
564 len = DIV_ROUND_UP(msb, 8);
565
566 if (cmd->pos >= IO_BUFFER_LENGTH - len - 1) {
567 pr_debug("Error adding u64: end of buffer.\n");
568 *err = -ERANGE;
569 return;
570 }
571 add_short_atom_header(cmd, false, false, len);
572 while (len--)
573 add_token_u8(err, cmd, number >> (len * 8));
574 }
575
576 static void add_token_bytestring(int *err, struct opal_dev *cmd,
577 const u8 *bytestring, size_t len)
578 {
579 size_t header_len = 1;
580 bool is_short_atom = true;
581
582 if (*err)
583 return;
584
585 if (len & ~SHORT_ATOM_LEN_MASK) {
586 header_len = 2;
587 is_short_atom = false;
588 }
589
590 if (len >= IO_BUFFER_LENGTH - cmd->pos - header_len) {
591 pr_debug("Error adding bytestring: end of buffer.\n");
592 *err = -ERANGE;
593 return;
594 }
595
596 if (is_short_atom)
597 add_short_atom_header(cmd, true, false, len);
598 else
599 add_medium_atom_header(cmd, true, false, len);
600
601 memcpy(&cmd->cmd[cmd->pos], bytestring, len);
602 cmd->pos += len;
603
604 }
605
606 static int build_locking_range(u8 *buffer, size_t length, u8 lr)
607 {
608 if (length > OPAL_UID_LENGTH) {
609 pr_debug("Can't build locking range. Length OOB\n");
610 return -ERANGE;
611 }
612
613 memcpy(buffer, opaluid[OPAL_LOCKINGRANGE_GLOBAL], OPAL_UID_LENGTH);
614
615 if (lr == 0)
616 return 0;
617 buffer[5] = LOCKING_RANGE_NON_GLOBAL;
618 buffer[7] = lr;
619
620 return 0;
621 }
622
623 static int build_locking_user(u8 *buffer, size_t length, u8 lr)
624 {
625 if (length > OPAL_UID_LENGTH) {
626 pr_debug("Can't build locking range user, Length OOB\n");
627 return -ERANGE;
628 }
629
630 memcpy(buffer, opaluid[OPAL_USER1_UID], OPAL_UID_LENGTH);
631
632 buffer[7] = lr + 1;
633
634 return 0;
635 }
636
637 static void set_comid(struct opal_dev *cmd, u16 comid)
638 {
639 struct opal_header *hdr = (struct opal_header *)cmd->cmd;
640
641 hdr->cp.extendedComID[0] = comid >> 8;
642 hdr->cp.extendedComID[1] = comid;
643 hdr->cp.extendedComID[2] = 0;
644 hdr->cp.extendedComID[3] = 0;
645 }
646
647 static int cmd_finalize(struct opal_dev *cmd, u32 hsn, u32 tsn)
648 {
649 struct opal_header *hdr;
650 int err = 0;
651
652 add_token_u8(&err, cmd, OPAL_ENDOFDATA);
653 add_token_u8(&err, cmd, OPAL_STARTLIST);
654 add_token_u8(&err, cmd, 0);
655 add_token_u8(&err, cmd, 0);
656 add_token_u8(&err, cmd, 0);
657 add_token_u8(&err, cmd, OPAL_ENDLIST);
658
659 if (err) {
660 pr_debug("Error finalizing command.\n");
661 return -EFAULT;
662 }
663
664 hdr = (struct opal_header *) cmd->cmd;
665
666 hdr->pkt.tsn = cpu_to_be32(tsn);
667 hdr->pkt.hsn = cpu_to_be32(hsn);
668
669 hdr->subpkt.length = cpu_to_be32(cmd->pos - sizeof(*hdr));
670 while (cmd->pos % 4) {
671 if (cmd->pos >= IO_BUFFER_LENGTH) {
672 pr_debug("Error: Buffer overrun\n");
673 return -ERANGE;
674 }
675 cmd->cmd[cmd->pos++] = 0;
676 }
677 hdr->pkt.length = cpu_to_be32(cmd->pos - sizeof(hdr->cp) -
678 sizeof(hdr->pkt));
679 hdr->cp.length = cpu_to_be32(cmd->pos - sizeof(hdr->cp));
680
681 return 0;
682 }
683
684 static const struct opal_resp_tok *response_get_token(
685 const struct parsed_resp *resp,
686 int n)
687 {
688 const struct opal_resp_tok *tok;
689
690 if (n >= resp->num) {
691 pr_debug("Token number doesn't exist: %d, resp: %d\n",
692 n, resp->num);
693 return ERR_PTR(-EINVAL);
694 }
695
696 tok = &resp->toks[n];
697 if (tok->len == 0) {
698 pr_debug("Token length must be non-zero\n");
699 return ERR_PTR(-EINVAL);
700 }
701
702 return tok;
703 }
704
705 static ssize_t response_parse_tiny(struct opal_resp_tok *tok,
706 const u8 *pos)
707 {
708 tok->pos = pos;
709 tok->len = 1;
710 tok->width = OPAL_WIDTH_TINY;
711
712 if (pos[0] & TINY_ATOM_SIGNED) {
713 tok->type = OPAL_DTA_TOKENID_SINT;
714 } else {
715 tok->type = OPAL_DTA_TOKENID_UINT;
716 tok->stored.u = pos[0] & 0x3f;
717 }
718
719 return tok->len;
720 }
721
722 static ssize_t response_parse_short(struct opal_resp_tok *tok,
723 const u8 *pos)
724 {
725 tok->pos = pos;
726 tok->len = (pos[0] & SHORT_ATOM_LEN_MASK) + 1;
727 tok->width = OPAL_WIDTH_SHORT;
728
729 if (pos[0] & SHORT_ATOM_BYTESTRING) {
730 tok->type = OPAL_DTA_TOKENID_BYTESTRING;
731 } else if (pos[0] & SHORT_ATOM_SIGNED) {
732 tok->type = OPAL_DTA_TOKENID_SINT;
733 } else {
734 u64 u_integer = 0;
735 ssize_t i, b = 0;
736
737 tok->type = OPAL_DTA_TOKENID_UINT;
738 if (tok->len > 9) {
739 pr_debug("uint64 with more than 8 bytes\n");
740 return -EINVAL;
741 }
742 for (i = tok->len - 1; i > 0; i--) {
743 u_integer |= ((u64)pos[i] << (8 * b));
744 b++;
745 }
746 tok->stored.u = u_integer;
747 }
748
749 return tok->len;
750 }
751
752 static ssize_t response_parse_medium(struct opal_resp_tok *tok,
753 const u8 *pos)
754 {
755 tok->pos = pos;
756 tok->len = (((pos[0] & MEDIUM_ATOM_LEN_MASK) << 8) | pos[1]) + 2;
757 tok->width = OPAL_WIDTH_MEDIUM;
758
759 if (pos[0] & MEDIUM_ATOM_BYTESTRING)
760 tok->type = OPAL_DTA_TOKENID_BYTESTRING;
761 else if (pos[0] & MEDIUM_ATOM_SIGNED)
762 tok->type = OPAL_DTA_TOKENID_SINT;
763 else
764 tok->type = OPAL_DTA_TOKENID_UINT;
765
766 return tok->len;
767 }
768
769 static ssize_t response_parse_long(struct opal_resp_tok *tok,
770 const u8 *pos)
771 {
772 tok->pos = pos;
773 tok->len = ((pos[1] << 16) | (pos[2] << 8) | pos[3]) + 4;
774 tok->width = OPAL_WIDTH_LONG;
775
776 if (pos[0] & LONG_ATOM_BYTESTRING)
777 tok->type = OPAL_DTA_TOKENID_BYTESTRING;
778 else if (pos[0] & LONG_ATOM_SIGNED)
779 tok->type = OPAL_DTA_TOKENID_SINT;
780 else
781 tok->type = OPAL_DTA_TOKENID_UINT;
782
783 return tok->len;
784 }
785
786 static ssize_t response_parse_token(struct opal_resp_tok *tok,
787 const u8 *pos)
788 {
789 tok->pos = pos;
790 tok->len = 1;
791 tok->type = OPAL_DTA_TOKENID_TOKEN;
792 tok->width = OPAL_WIDTH_TOKEN;
793
794 return tok->len;
795 }
796
797 static int response_parse(const u8 *buf, size_t length,
798 struct parsed_resp *resp)
799 {
800 const struct opal_header *hdr;
801 struct opal_resp_tok *iter;
802 int num_entries = 0;
803 int total;
804 ssize_t token_length;
805 const u8 *pos;
806 u32 clen, plen, slen;
807
808 if (!buf)
809 return -EFAULT;
810
811 if (!resp)
812 return -EFAULT;
813
814 hdr = (struct opal_header *)buf;
815 pos = buf;
816 pos += sizeof(*hdr);
817
818 clen = be32_to_cpu(hdr->cp.length);
819 plen = be32_to_cpu(hdr->pkt.length);
820 slen = be32_to_cpu(hdr->subpkt.length);
821 pr_debug("Response size: cp: %u, pkt: %u, subpkt: %u\n",
822 clen, plen, slen);
823
824 if (clen == 0 || plen == 0 || slen == 0 ||
825 slen > IO_BUFFER_LENGTH - sizeof(*hdr)) {
826 pr_debug("Bad header length. cp: %u, pkt: %u, subpkt: %u\n",
827 clen, plen, slen);
828 print_buffer(pos, sizeof(*hdr));
829 return -EINVAL;
830 }
831
832 if (pos > buf + length)
833 return -EFAULT;
834
835 iter = resp->toks;
836 total = slen;
837 print_buffer(pos, total);
838 while (total > 0) {
839 if (pos[0] <= TINY_ATOM_BYTE) /* tiny atom */
840 token_length = response_parse_tiny(iter, pos);
841 else if (pos[0] <= SHORT_ATOM_BYTE) /* short atom */
842 token_length = response_parse_short(iter, pos);
843 else if (pos[0] <= MEDIUM_ATOM_BYTE) /* medium atom */
844 token_length = response_parse_medium(iter, pos);
845 else if (pos[0] <= LONG_ATOM_BYTE) /* long atom */
846 token_length = response_parse_long(iter, pos);
847 else /* TOKEN */
848 token_length = response_parse_token(iter, pos);
849
850 if (token_length < 0)
851 return token_length;
852
853 pos += token_length;
854 total -= token_length;
855 iter++;
856 num_entries++;
857 }
858
859 if (num_entries == 0) {
860 pr_debug("Couldn't parse response.\n");
861 return -EINVAL;
862 }
863 resp->num = num_entries;
864
865 return 0;
866 }
867
868 static size_t response_get_string(const struct parsed_resp *resp, int n,
869 const char **store)
870 {
871 u8 skip;
872 const struct opal_resp_tok *token;
873
874 *store = NULL;
875 if (!resp) {
876 pr_debug("Response is NULL\n");
877 return 0;
878 }
879
880 if (n >= resp->num) {
881 pr_debug("Response has %d tokens. Can't access %d\n",
882 resp->num, n);
883 return 0;
884 }
885
886 token = &resp->toks[n];
887 if (token->type != OPAL_DTA_TOKENID_BYTESTRING) {
888 pr_debug("Token is not a byte string!\n");
889 return 0;
890 }
891
892 switch (token->width) {
893 case OPAL_WIDTH_TINY:
894 case OPAL_WIDTH_SHORT:
895 skip = 1;
896 break;
897 case OPAL_WIDTH_MEDIUM:
898 skip = 2;
899 break;
900 case OPAL_WIDTH_LONG:
901 skip = 4;
902 break;
903 default:
904 pr_debug("Token has invalid width!\n");
905 return 0;
906 }
907
908 *store = token->pos + skip;
909 return token->len - skip;
910 }
911
912 static u64 response_get_u64(const struct parsed_resp *resp, int n)
913 {
914 if (!resp) {
915 pr_debug("Response is NULL\n");
916 return 0;
917 }
918
919 if (n >= resp->num) {
920 pr_debug("Response has %d tokens. Can't access %d\n",
921 resp->num, n);
922 return 0;
923 }
924
925 if (resp->toks[n].type != OPAL_DTA_TOKENID_UINT) {
926 pr_debug("Token is not unsigned it: %d\n",
927 resp->toks[n].type);
928 return 0;
929 }
930
931 if (!(resp->toks[n].width == OPAL_WIDTH_TINY ||
932 resp->toks[n].width == OPAL_WIDTH_SHORT)) {
933 pr_debug("Atom is not short or tiny: %d\n",
934 resp->toks[n].width);
935 return 0;
936 }
937
938 return resp->toks[n].stored.u;
939 }
940
941 static bool response_token_matches(const struct opal_resp_tok *token, u8 match)
942 {
943 if (IS_ERR(token) ||
944 token->type != OPAL_DTA_TOKENID_TOKEN ||
945 token->pos[0] != match)
946 return false;
947 return true;
948 }
949
950 static u8 response_status(const struct parsed_resp *resp)
951 {
952 const struct opal_resp_tok *tok;
953
954 tok = response_get_token(resp, 0);
955 if (response_token_matches(tok, OPAL_ENDOFSESSION))
956 return 0;
957
958 if (resp->num < 5)
959 return DTAERROR_NO_METHOD_STATUS;
960
961 tok = response_get_token(resp, resp->num - 5);
962 if (!response_token_matches(tok, OPAL_STARTLIST))
963 return DTAERROR_NO_METHOD_STATUS;
964
965 tok = response_get_token(resp, resp->num - 1);
966 if (!response_token_matches(tok, OPAL_ENDLIST))
967 return DTAERROR_NO_METHOD_STATUS;
968
969 return response_get_u64(resp, resp->num - 4);
970 }
971
972 /* Parses and checks for errors */
973 static int parse_and_check_status(struct opal_dev *dev)
974 {
975 int error;
976
977 print_buffer(dev->cmd, dev->pos);
978
979 error = response_parse(dev->resp, IO_BUFFER_LENGTH, &dev->parsed);
980 if (error) {
981 pr_debug("Couldn't parse response.\n");
982 return error;
983 }
984
985 return response_status(&dev->parsed);
986 }
987
988 static void clear_opal_cmd(struct opal_dev *dev)
989 {
990 dev->pos = sizeof(struct opal_header);
991 memset(dev->cmd, 0, IO_BUFFER_LENGTH);
992 }
993
994 static int start_opal_session_cont(struct opal_dev *dev)
995 {
996 u32 hsn, tsn;
997 int error = 0;
998
999 error = parse_and_check_status(dev);
1000 if (error)
1001 return error;
1002
1003 hsn = response_get_u64(&dev->parsed, 4);
1004 tsn = response_get_u64(&dev->parsed, 5);
1005
1006 if (hsn == 0 && tsn == 0) {
1007 pr_debug("Couldn't authenticate session\n");
1008 return -EPERM;
1009 }
1010
1011 dev->hsn = hsn;
1012 dev->tsn = tsn;
1013 return 0;
1014 }
1015
1016 static void add_suspend_info(struct opal_dev *dev,
1017 struct opal_suspend_data *sus)
1018 {
1019 struct opal_suspend_data *iter;
1020
1021 list_for_each_entry(iter, &dev->unlk_lst, node) {
1022 if (iter->lr == sus->lr) {
1023 list_del(&iter->node);
1024 kfree(iter);
1025 break;
1026 }
1027 }
1028 list_add_tail(&sus->node, &dev->unlk_lst);
1029 }
1030
1031 static int end_session_cont(struct opal_dev *dev)
1032 {
1033 dev->hsn = 0;
1034 dev->tsn = 0;
1035 return parse_and_check_status(dev);
1036 }
1037
1038 static int finalize_and_send(struct opal_dev *dev, cont_fn cont)
1039 {
1040 int ret;
1041
1042 ret = cmd_finalize(dev, dev->hsn, dev->tsn);
1043 if (ret) {
1044 pr_debug("Error finalizing command buffer: %d\n", ret);
1045 return ret;
1046 }
1047
1048 print_buffer(dev->cmd, dev->pos);
1049
1050 return opal_send_recv(dev, cont);
1051 }
1052
1053 static int gen_key(struct opal_dev *dev, void *data)
1054 {
1055 u8 uid[OPAL_UID_LENGTH];
1056 int err = 0;
1057
1058 clear_opal_cmd(dev);
1059 set_comid(dev, dev->comid);
1060
1061 memcpy(uid, dev->prev_data, min(sizeof(uid), dev->prev_d_len));
1062 kfree(dev->prev_data);
1063 dev->prev_data = NULL;
1064
1065 add_token_u8(&err, dev, OPAL_CALL);
1066 add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
1067 add_token_bytestring(&err, dev, opalmethod[OPAL_GENKEY],
1068 OPAL_UID_LENGTH);
1069 add_token_u8(&err, dev, OPAL_STARTLIST);
1070 add_token_u8(&err, dev, OPAL_ENDLIST);
1071
1072 if (err) {
1073 pr_debug("Error building gen key command\n");
1074 return err;
1075
1076 }
1077 return finalize_and_send(dev, parse_and_check_status);
1078 }
1079
1080 static int get_active_key_cont(struct opal_dev *dev)
1081 {
1082 const char *activekey;
1083 size_t keylen;
1084 int error = 0;
1085
1086 error = parse_and_check_status(dev);
1087 if (error)
1088 return error;
1089 keylen = response_get_string(&dev->parsed, 4, &activekey);
1090 if (!activekey) {
1091 pr_debug("%s: Couldn't extract the Activekey from the response\n",
1092 __func__);
1093 return OPAL_INVAL_PARAM;
1094 }
1095 dev->prev_data = kmemdup(activekey, keylen, GFP_KERNEL);
1096
1097 if (!dev->prev_data)
1098 return -ENOMEM;
1099
1100 dev->prev_d_len = keylen;
1101
1102 return 0;
1103 }
1104
1105 static int get_active_key(struct opal_dev *dev, void *data)
1106 {
1107 u8 uid[OPAL_UID_LENGTH];
1108 int err = 0;
1109 u8 *lr = data;
1110
1111 clear_opal_cmd(dev);
1112 set_comid(dev, dev->comid);
1113
1114 err = build_locking_range(uid, sizeof(uid), *lr);
1115 if (err)
1116 return err;
1117
1118 err = 0;
1119 add_token_u8(&err, dev, OPAL_CALL);
1120 add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
1121 add_token_bytestring(&err, dev, opalmethod[OPAL_GET], OPAL_UID_LENGTH);
1122 add_token_u8(&err, dev, OPAL_STARTLIST);
1123 add_token_u8(&err, dev, OPAL_STARTLIST);
1124 add_token_u8(&err, dev, OPAL_STARTNAME);
1125 add_token_u8(&err, dev, 3); /* startCloumn */
1126 add_token_u8(&err, dev, 10); /* ActiveKey */
1127 add_token_u8(&err, dev, OPAL_ENDNAME);
1128 add_token_u8(&err, dev, OPAL_STARTNAME);
1129 add_token_u8(&err, dev, 4); /* endColumn */
1130 add_token_u8(&err, dev, 10); /* ActiveKey */
1131 add_token_u8(&err, dev, OPAL_ENDNAME);
1132 add_token_u8(&err, dev, OPAL_ENDLIST);
1133 add_token_u8(&err, dev, OPAL_ENDLIST);
1134 if (err) {
1135 pr_debug("Error building get active key command\n");
1136 return err;
1137 }
1138
1139 return finalize_and_send(dev, get_active_key_cont);
1140 }
1141
1142 static int generic_lr_enable_disable(struct opal_dev *dev,
1143 u8 *uid, bool rle, bool wle,
1144 bool rl, bool wl)
1145 {
1146 int err = 0;
1147
1148 add_token_u8(&err, dev, OPAL_CALL);
1149 add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
1150 add_token_bytestring(&err, dev, opalmethod[OPAL_SET], OPAL_UID_LENGTH);
1151
1152 add_token_u8(&err, dev, OPAL_STARTLIST);
1153 add_token_u8(&err, dev, OPAL_STARTNAME);
1154 add_token_u8(&err, dev, OPAL_VALUES);
1155 add_token_u8(&err, dev, OPAL_STARTLIST);
1156
1157 add_token_u8(&err, dev, OPAL_STARTNAME);
1158 add_token_u8(&err, dev, 5); /* ReadLockEnabled */
1159 add_token_u8(&err, dev, rle);
1160 add_token_u8(&err, dev, OPAL_ENDNAME);
1161
1162 add_token_u8(&err, dev, OPAL_STARTNAME);
1163 add_token_u8(&err, dev, 6); /* WriteLockEnabled */
1164 add_token_u8(&err, dev, wle);
1165 add_token_u8(&err, dev, OPAL_ENDNAME);
1166
1167 add_token_u8(&err, dev, OPAL_STARTNAME);
1168 add_token_u8(&err, dev, OPAL_READLOCKED);
1169 add_token_u8(&err, dev, rl);
1170 add_token_u8(&err, dev, OPAL_ENDNAME);
1171
1172 add_token_u8(&err, dev, OPAL_STARTNAME);
1173 add_token_u8(&err, dev, OPAL_WRITELOCKED);
1174 add_token_u8(&err, dev, wl);
1175 add_token_u8(&err, dev, OPAL_ENDNAME);
1176
1177 add_token_u8(&err, dev, OPAL_ENDLIST);
1178 add_token_u8(&err, dev, OPAL_ENDNAME);
1179 add_token_u8(&err, dev, OPAL_ENDLIST);
1180 return err;
1181 }
1182
1183 static inline int enable_global_lr(struct opal_dev *dev, u8 *uid,
1184 struct opal_user_lr_setup *setup)
1185 {
1186 int err;
1187
1188 err = generic_lr_enable_disable(dev, uid, !!setup->RLE, !!setup->WLE,
1189 0, 0);
1190 if (err)
1191 pr_debug("Failed to create enable global lr command\n");
1192 return err;
1193 }
1194
1195 static int setup_locking_range(struct opal_dev *dev, void *data)
1196 {
1197 u8 uid[OPAL_UID_LENGTH];
1198 struct opal_user_lr_setup *setup = data;
1199 u8 lr;
1200 int err = 0;
1201
1202 clear_opal_cmd(dev);
1203 set_comid(dev, dev->comid);
1204
1205 lr = setup->session.opal_key.lr;
1206 err = build_locking_range(uid, sizeof(uid), lr);
1207 if (err)
1208 return err;
1209
1210 if (lr == 0)
1211 err = enable_global_lr(dev, uid, setup);
1212 else {
1213 add_token_u8(&err, dev, OPAL_CALL);
1214 add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
1215 add_token_bytestring(&err, dev, opalmethod[OPAL_SET],
1216 OPAL_UID_LENGTH);
1217
1218 add_token_u8(&err, dev, OPAL_STARTLIST);
1219 add_token_u8(&err, dev, OPAL_STARTNAME);
1220 add_token_u8(&err, dev, OPAL_VALUES);
1221 add_token_u8(&err, dev, OPAL_STARTLIST);
1222
1223 add_token_u8(&err, dev, OPAL_STARTNAME);
1224 add_token_u8(&err, dev, 3); /* Ranges Start */
1225 add_token_u64(&err, dev, setup->range_start);
1226 add_token_u8(&err, dev, OPAL_ENDNAME);
1227
1228 add_token_u8(&err, dev, OPAL_STARTNAME);
1229 add_token_u8(&err, dev, 4); /* Ranges length */
1230 add_token_u64(&err, dev, setup->range_length);
1231 add_token_u8(&err, dev, OPAL_ENDNAME);
1232
1233 add_token_u8(&err, dev, OPAL_STARTNAME);
1234 add_token_u8(&err, dev, 5); /*ReadLockEnabled */
1235 add_token_u64(&err, dev, !!setup->RLE);
1236 add_token_u8(&err, dev, OPAL_ENDNAME);
1237
1238 add_token_u8(&err, dev, OPAL_STARTNAME);
1239 add_token_u8(&err, dev, 6); /*WriteLockEnabled*/
1240 add_token_u64(&err, dev, !!setup->WLE);
1241 add_token_u8(&err, dev, OPAL_ENDNAME);
1242
1243 add_token_u8(&err, dev, OPAL_ENDLIST);
1244 add_token_u8(&err, dev, OPAL_ENDNAME);
1245 add_token_u8(&err, dev, OPAL_ENDLIST);
1246
1247 }
1248 if (err) {
1249 pr_debug("Error building Setup Locking range command.\n");
1250 return err;
1251
1252 }
1253
1254 return finalize_and_send(dev, parse_and_check_status);
1255 }
1256
1257 static int start_generic_opal_session(struct opal_dev *dev,
1258 enum opal_uid auth,
1259 enum opal_uid sp_type,
1260 const char *key,
1261 u8 key_len)
1262 {
1263 u32 hsn;
1264 int err = 0;
1265
1266 if (key == NULL && auth != OPAL_ANYBODY_UID)
1267 return OPAL_INVAL_PARAM;
1268
1269 clear_opal_cmd(dev);
1270
1271 set_comid(dev, dev->comid);
1272 hsn = GENERIC_HOST_SESSION_NUM;
1273
1274 add_token_u8(&err, dev, OPAL_CALL);
1275 add_token_bytestring(&err, dev, opaluid[OPAL_SMUID_UID],
1276 OPAL_UID_LENGTH);
1277 add_token_bytestring(&err, dev, opalmethod[OPAL_STARTSESSION],
1278 OPAL_UID_LENGTH);
1279 add_token_u8(&err, dev, OPAL_STARTLIST);
1280 add_token_u64(&err, dev, hsn);
1281 add_token_bytestring(&err, dev, opaluid[sp_type], OPAL_UID_LENGTH);
1282 add_token_u8(&err, dev, 1);
1283
1284 switch (auth) {
1285 case OPAL_ANYBODY_UID:
1286 add_token_u8(&err, dev, OPAL_ENDLIST);
1287 break;
1288 case OPAL_ADMIN1_UID:
1289 case OPAL_SID_UID:
1290 add_token_u8(&err, dev, OPAL_STARTNAME);
1291 add_token_u8(&err, dev, 0); /* HostChallenge */
1292 add_token_bytestring(&err, dev, key, key_len);
1293 add_token_u8(&err, dev, OPAL_ENDNAME);
1294 add_token_u8(&err, dev, OPAL_STARTNAME);
1295 add_token_u8(&err, dev, 3); /* HostSignAuth */
1296 add_token_bytestring(&err, dev, opaluid[auth],
1297 OPAL_UID_LENGTH);
1298 add_token_u8(&err, dev, OPAL_ENDNAME);
1299 add_token_u8(&err, dev, OPAL_ENDLIST);
1300 break;
1301 default:
1302 pr_debug("Cannot start Admin SP session with auth %d\n", auth);
1303 return OPAL_INVAL_PARAM;
1304 }
1305
1306 if (err) {
1307 pr_debug("Error building start adminsp session command.\n");
1308 return err;
1309 }
1310
1311 return finalize_and_send(dev, start_opal_session_cont);
1312 }
1313
1314 static int start_anybodyASP_opal_session(struct opal_dev *dev, void *data)
1315 {
1316 return start_generic_opal_session(dev, OPAL_ANYBODY_UID,
1317 OPAL_ADMINSP_UID, NULL, 0);
1318 }
1319
1320 static int start_SIDASP_opal_session(struct opal_dev *dev, void *data)
1321 {
1322 int ret;
1323 const u8 *key = dev->prev_data;
1324
1325 if (!key) {
1326 const struct opal_key *okey = data;
1327 ret = start_generic_opal_session(dev, OPAL_SID_UID,
1328 OPAL_ADMINSP_UID,
1329 okey->key,
1330 okey->key_len);
1331 } else {
1332 ret = start_generic_opal_session(dev, OPAL_SID_UID,
1333 OPAL_ADMINSP_UID,
1334 key, dev->prev_d_len);
1335 kfree(key);
1336 dev->prev_data = NULL;
1337 }
1338 return ret;
1339 }
1340
1341 static int start_admin1LSP_opal_session(struct opal_dev *dev, void *data)
1342 {
1343 struct opal_key *key = data;
1344 return start_generic_opal_session(dev, OPAL_ADMIN1_UID,
1345 OPAL_LOCKINGSP_UID,
1346 key->key, key->key_len);
1347 }
1348
1349 static int start_auth_opal_session(struct opal_dev *dev, void *data)
1350 {
1351 struct opal_session_info *session = data;
1352 u8 lk_ul_user[OPAL_UID_LENGTH];
1353 size_t keylen = session->opal_key.key_len;
1354 int err = 0;
1355
1356 u8 *key = session->opal_key.key;
1357 u32 hsn = GENERIC_HOST_SESSION_NUM;
1358
1359 clear_opal_cmd(dev);
1360 set_comid(dev, dev->comid);
1361
1362 if (session->sum) {
1363 err = build_locking_user(lk_ul_user, sizeof(lk_ul_user),
1364 session->opal_key.lr);
1365 if (err)
1366 return err;
1367
1368 } else if (session->who != OPAL_ADMIN1 && !session->sum) {
1369 err = build_locking_user(lk_ul_user, sizeof(lk_ul_user),
1370 session->who - 1);
1371 if (err)
1372 return err;
1373 } else
1374 memcpy(lk_ul_user, opaluid[OPAL_ADMIN1_UID], OPAL_UID_LENGTH);
1375
1376 add_token_u8(&err, dev, OPAL_CALL);
1377 add_token_bytestring(&err, dev, opaluid[OPAL_SMUID_UID],
1378 OPAL_UID_LENGTH);
1379 add_token_bytestring(&err, dev, opalmethod[OPAL_STARTSESSION],
1380 OPAL_UID_LENGTH);
1381
1382 add_token_u8(&err, dev, OPAL_STARTLIST);
1383 add_token_u64(&err, dev, hsn);
1384 add_token_bytestring(&err, dev, opaluid[OPAL_LOCKINGSP_UID],
1385 OPAL_UID_LENGTH);
1386 add_token_u8(&err, dev, 1);
1387 add_token_u8(&err, dev, OPAL_STARTNAME);
1388 add_token_u8(&err, dev, 0);
1389 add_token_bytestring(&err, dev, key, keylen);
1390 add_token_u8(&err, dev, OPAL_ENDNAME);
1391 add_token_u8(&err, dev, OPAL_STARTNAME);
1392 add_token_u8(&err, dev, 3);
1393 add_token_bytestring(&err, dev, lk_ul_user, OPAL_UID_LENGTH);
1394 add_token_u8(&err, dev, OPAL_ENDNAME);
1395 add_token_u8(&err, dev, OPAL_ENDLIST);
1396
1397 if (err) {
1398 pr_debug("Error building STARTSESSION command.\n");
1399 return err;
1400 }
1401
1402 return finalize_and_send(dev, start_opal_session_cont);
1403 }
1404
1405 static int revert_tper(struct opal_dev *dev, void *data)
1406 {
1407 int err = 0;
1408
1409 clear_opal_cmd(dev);
1410 set_comid(dev, dev->comid);
1411
1412 add_token_u8(&err, dev, OPAL_CALL);
1413 add_token_bytestring(&err, dev, opaluid[OPAL_ADMINSP_UID],
1414 OPAL_UID_LENGTH);
1415 add_token_bytestring(&err, dev, opalmethod[OPAL_REVERT],
1416 OPAL_UID_LENGTH);
1417 add_token_u8(&err, dev, OPAL_STARTLIST);
1418 add_token_u8(&err, dev, OPAL_ENDLIST);
1419 if (err) {
1420 pr_debug("Error building REVERT TPER command.\n");
1421 return err;
1422 }
1423
1424 return finalize_and_send(dev, parse_and_check_status);
1425 }
1426
1427 static int internal_activate_user(struct opal_dev *dev, void *data)
1428 {
1429 struct opal_session_info *session = data;
1430 u8 uid[OPAL_UID_LENGTH];
1431 int err = 0;
1432
1433 clear_opal_cmd(dev);
1434 set_comid(dev, dev->comid);
1435
1436 memcpy(uid, opaluid[OPAL_USER1_UID], OPAL_UID_LENGTH);
1437 uid[7] = session->who;
1438
1439 add_token_u8(&err, dev, OPAL_CALL);
1440 add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
1441 add_token_bytestring(&err, dev, opalmethod[OPAL_SET], OPAL_UID_LENGTH);
1442 add_token_u8(&err, dev, OPAL_STARTLIST);
1443 add_token_u8(&err, dev, OPAL_STARTNAME);
1444 add_token_u8(&err, dev, OPAL_VALUES);
1445 add_token_u8(&err, dev, OPAL_STARTLIST);
1446 add_token_u8(&err, dev, OPAL_STARTNAME);
1447 add_token_u8(&err, dev, 5); /* Enabled */
1448 add_token_u8(&err, dev, OPAL_TRUE);
1449 add_token_u8(&err, dev, OPAL_ENDNAME);
1450 add_token_u8(&err, dev, OPAL_ENDLIST);
1451 add_token_u8(&err, dev, OPAL_ENDNAME);
1452 add_token_u8(&err, dev, OPAL_ENDLIST);
1453
1454 if (err) {
1455 pr_debug("Error building Activate UserN command.\n");
1456 return err;
1457 }
1458
1459 return finalize_and_send(dev, parse_and_check_status);
1460 }
1461
1462 static int erase_locking_range(struct opal_dev *dev, void *data)
1463 {
1464 struct opal_session_info *session = data;
1465 u8 uid[OPAL_UID_LENGTH];
1466 int err = 0;
1467
1468 clear_opal_cmd(dev);
1469 set_comid(dev, dev->comid);
1470
1471 if (build_locking_range(uid, sizeof(uid), session->opal_key.lr) < 0)
1472 return -ERANGE;
1473
1474 add_token_u8(&err, dev, OPAL_CALL);
1475 add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
1476 add_token_bytestring(&err, dev, opalmethod[OPAL_ERASE],
1477 OPAL_UID_LENGTH);
1478 add_token_u8(&err, dev, OPAL_STARTLIST);
1479 add_token_u8(&err, dev, OPAL_ENDLIST);
1480
1481 if (err) {
1482 pr_debug("Error building Erase Locking Range Command.\n");
1483 return err;
1484 }
1485 return finalize_and_send(dev, parse_and_check_status);
1486 }
1487
1488 static int set_mbr_done(struct opal_dev *dev, void *data)
1489 {
1490 u8 *mbr_done_tf = data;
1491 int err = 0;
1492
1493 clear_opal_cmd(dev);
1494 set_comid(dev, dev->comid);
1495
1496 add_token_u8(&err, dev, OPAL_CALL);
1497 add_token_bytestring(&err, dev, opaluid[OPAL_MBRCONTROL],
1498 OPAL_UID_LENGTH);
1499 add_token_bytestring(&err, dev, opalmethod[OPAL_SET], OPAL_UID_LENGTH);
1500 add_token_u8(&err, dev, OPAL_STARTLIST);
1501 add_token_u8(&err, dev, OPAL_STARTNAME);
1502 add_token_u8(&err, dev, OPAL_VALUES);
1503 add_token_u8(&err, dev, OPAL_STARTLIST);
1504 add_token_u8(&err, dev, OPAL_STARTNAME);
1505 add_token_u8(&err, dev, 2); /* Done */
1506 add_token_u8(&err, dev, *mbr_done_tf); /* Done T or F */
1507 add_token_u8(&err, dev, OPAL_ENDNAME);
1508 add_token_u8(&err, dev, OPAL_ENDLIST);
1509 add_token_u8(&err, dev, OPAL_ENDNAME);
1510 add_token_u8(&err, dev, OPAL_ENDLIST);
1511
1512 if (err) {
1513 pr_debug("Error Building set MBR Done command\n");
1514 return err;
1515 }
1516
1517 return finalize_and_send(dev, parse_and_check_status);
1518 }
1519
1520 static int set_mbr_enable_disable(struct opal_dev *dev, void *data)
1521 {
1522 u8 *mbr_en_dis = data;
1523 int err = 0;
1524
1525 clear_opal_cmd(dev);
1526 set_comid(dev, dev->comid);
1527
1528 add_token_u8(&err, dev, OPAL_CALL);
1529 add_token_bytestring(&err, dev, opaluid[OPAL_MBRCONTROL],
1530 OPAL_UID_LENGTH);
1531 add_token_bytestring(&err, dev, opalmethod[OPAL_SET], OPAL_UID_LENGTH);
1532 add_token_u8(&err, dev, OPAL_STARTLIST);
1533 add_token_u8(&err, dev, OPAL_STARTNAME);
1534 add_token_u8(&err, dev, OPAL_VALUES);
1535 add_token_u8(&err, dev, OPAL_STARTLIST);
1536 add_token_u8(&err, dev, OPAL_STARTNAME);
1537 add_token_u8(&err, dev, 1);
1538 add_token_u8(&err, dev, *mbr_en_dis);
1539 add_token_u8(&err, dev, OPAL_ENDNAME);
1540 add_token_u8(&err, dev, OPAL_ENDLIST);
1541 add_token_u8(&err, dev, OPAL_ENDNAME);
1542 add_token_u8(&err, dev, OPAL_ENDLIST);
1543
1544 if (err) {
1545 pr_debug("Error Building set MBR done command\n");
1546 return err;
1547 }
1548
1549 return finalize_and_send(dev, parse_and_check_status);
1550 }
1551
1552 static int generic_pw_cmd(u8 *key, size_t key_len, u8 *cpin_uid,
1553 struct opal_dev *dev)
1554 {
1555 int err = 0;
1556
1557 clear_opal_cmd(dev);
1558 set_comid(dev, dev->comid);
1559
1560 add_token_u8(&err, dev, OPAL_CALL);
1561 add_token_bytestring(&err, dev, cpin_uid, OPAL_UID_LENGTH);
1562 add_token_bytestring(&err, dev, opalmethod[OPAL_SET],
1563 OPAL_UID_LENGTH);
1564 add_token_u8(&err, dev, OPAL_STARTLIST);
1565 add_token_u8(&err, dev, OPAL_STARTNAME);
1566 add_token_u8(&err, dev, OPAL_VALUES);
1567 add_token_u8(&err, dev, OPAL_STARTLIST);
1568 add_token_u8(&err, dev, OPAL_STARTNAME);
1569 add_token_u8(&err, dev, 3); /* PIN */
1570 add_token_bytestring(&err, dev, key, key_len);
1571 add_token_u8(&err, dev, OPAL_ENDNAME);
1572 add_token_u8(&err, dev, OPAL_ENDLIST);
1573 add_token_u8(&err, dev, OPAL_ENDNAME);
1574 add_token_u8(&err, dev, OPAL_ENDLIST);
1575
1576 return err;
1577 }
1578
1579 static int set_new_pw(struct opal_dev *dev, void *data)
1580 {
1581 u8 cpin_uid[OPAL_UID_LENGTH];
1582 struct opal_session_info *usr = data;
1583
1584 memcpy(cpin_uid, opaluid[OPAL_C_PIN_ADMIN1], OPAL_UID_LENGTH);
1585
1586 if (usr->who != OPAL_ADMIN1) {
1587 cpin_uid[5] = 0x03;
1588 if (usr->sum)
1589 cpin_uid[7] = usr->opal_key.lr + 1;
1590 else
1591 cpin_uid[7] = usr->who;
1592 }
1593
1594 if (generic_pw_cmd(usr->opal_key.key, usr->opal_key.key_len,
1595 cpin_uid, dev)) {
1596 pr_debug("Error building set password command.\n");
1597 return -ERANGE;
1598 }
1599
1600 return finalize_and_send(dev, parse_and_check_status);
1601 }
1602
1603 static int set_sid_cpin_pin(struct opal_dev *dev, void *data)
1604 {
1605 u8 cpin_uid[OPAL_UID_LENGTH];
1606 struct opal_key *key = data;
1607
1608 memcpy(cpin_uid, opaluid[OPAL_C_PIN_SID], OPAL_UID_LENGTH);
1609
1610 if (generic_pw_cmd(key->key, key->key_len, cpin_uid, dev)) {
1611 pr_debug("Error building Set SID cpin\n");
1612 return -ERANGE;
1613 }
1614 return finalize_and_send(dev, parse_and_check_status);
1615 }
1616
1617 static int add_user_to_lr(struct opal_dev *dev, void *data)
1618 {
1619 u8 lr_buffer[OPAL_UID_LENGTH];
1620 u8 user_uid[OPAL_UID_LENGTH];
1621 struct opal_lock_unlock *lkul = data;
1622 int err = 0;
1623
1624 clear_opal_cmd(dev);
1625 set_comid(dev, dev->comid);
1626
1627 memcpy(lr_buffer, opaluid[OPAL_LOCKINGRANGE_ACE_RDLOCKED],
1628 OPAL_UID_LENGTH);
1629
1630 if (lkul->l_state == OPAL_RW)
1631 memcpy(lr_buffer, opaluid[OPAL_LOCKINGRANGE_ACE_WRLOCKED],
1632 OPAL_UID_LENGTH);
1633
1634 lr_buffer[7] = lkul->session.opal_key.lr;
1635
1636 memcpy(user_uid, opaluid[OPAL_USER1_UID], OPAL_UID_LENGTH);
1637
1638 user_uid[7] = lkul->session.who;
1639
1640 add_token_u8(&err, dev, OPAL_CALL);
1641 add_token_bytestring(&err, dev, lr_buffer, OPAL_UID_LENGTH);
1642 add_token_bytestring(&err, dev, opalmethod[OPAL_SET],
1643 OPAL_UID_LENGTH);
1644
1645 add_token_u8(&err, dev, OPAL_STARTLIST);
1646 add_token_u8(&err, dev, OPAL_STARTNAME);
1647 add_token_u8(&err, dev, OPAL_VALUES);
1648
1649 add_token_u8(&err, dev, OPAL_STARTLIST);
1650 add_token_u8(&err, dev, OPAL_STARTNAME);
1651 add_token_u8(&err, dev, 3);
1652
1653 add_token_u8(&err, dev, OPAL_STARTLIST);
1654
1655
1656 add_token_u8(&err, dev, OPAL_STARTNAME);
1657 add_token_bytestring(&err, dev,
1658 opaluid[OPAL_HALF_UID_AUTHORITY_OBJ_REF],
1659 OPAL_UID_LENGTH/2);
1660 add_token_bytestring(&err, dev, user_uid, OPAL_UID_LENGTH);
1661 add_token_u8(&err, dev, OPAL_ENDNAME);
1662
1663
1664 add_token_u8(&err, dev, OPAL_STARTNAME);
1665 add_token_bytestring(&err, dev,
1666 opaluid[OPAL_HALF_UID_AUTHORITY_OBJ_REF],
1667 OPAL_UID_LENGTH/2);
1668 add_token_bytestring(&err, dev, user_uid, OPAL_UID_LENGTH);
1669 add_token_u8(&err, dev, OPAL_ENDNAME);
1670
1671
1672 add_token_u8(&err, dev, OPAL_STARTNAME);
1673 add_token_bytestring(&err, dev, opaluid[OPAL_HALF_UID_BOOLEAN_ACE],
1674 OPAL_UID_LENGTH/2);
1675 add_token_u8(&err, dev, 1);
1676 add_token_u8(&err, dev, OPAL_ENDNAME);
1677
1678
1679 add_token_u8(&err, dev, OPAL_ENDLIST);
1680 add_token_u8(&err, dev, OPAL_ENDNAME);
1681 add_token_u8(&err, dev, OPAL_ENDLIST);
1682 add_token_u8(&err, dev, OPAL_ENDNAME);
1683 add_token_u8(&err, dev, OPAL_ENDLIST);
1684
1685 if (err) {
1686 pr_debug("Error building add user to locking range command.\n");
1687 return err;
1688 }
1689
1690 return finalize_and_send(dev, parse_and_check_status);
1691 }
1692
1693 static int lock_unlock_locking_range(struct opal_dev *dev, void *data)
1694 {
1695 u8 lr_buffer[OPAL_UID_LENGTH];
1696 struct opal_lock_unlock *lkul = data;
1697 u8 read_locked = 1, write_locked = 1;
1698 int err = 0;
1699
1700 clear_opal_cmd(dev);
1701 set_comid(dev, dev->comid);
1702
1703 if (build_locking_range(lr_buffer, sizeof(lr_buffer),
1704 lkul->session.opal_key.lr) < 0)
1705 return -ERANGE;
1706
1707 switch (lkul->l_state) {
1708 case OPAL_RO:
1709 read_locked = 0;
1710 write_locked = 1;
1711 break;
1712 case OPAL_RW:
1713 read_locked = 0;
1714 write_locked = 0;
1715 break;
1716 case OPAL_LK:
1717 /* vars are initalized to locked */
1718 break;
1719 default:
1720 pr_debug("Tried to set an invalid locking state... returning to uland\n");
1721 return OPAL_INVAL_PARAM;
1722 }
1723
1724 add_token_u8(&err, dev, OPAL_CALL);
1725 add_token_bytestring(&err, dev, lr_buffer, OPAL_UID_LENGTH);
1726 add_token_bytestring(&err, dev, opalmethod[OPAL_SET], OPAL_UID_LENGTH);
1727 add_token_u8(&err, dev, OPAL_STARTLIST);
1728 add_token_u8(&err, dev, OPAL_STARTNAME);
1729 add_token_u8(&err, dev, OPAL_VALUES);
1730 add_token_u8(&err, dev, OPAL_STARTLIST);
1731
1732 add_token_u8(&err, dev, OPAL_STARTNAME);
1733 add_token_u8(&err, dev, OPAL_READLOCKED);
1734 add_token_u8(&err, dev, read_locked);
1735 add_token_u8(&err, dev, OPAL_ENDNAME);
1736
1737 add_token_u8(&err, dev, OPAL_STARTNAME);
1738 add_token_u8(&err, dev, OPAL_WRITELOCKED);
1739 add_token_u8(&err, dev, write_locked);
1740 add_token_u8(&err, dev, OPAL_ENDNAME);
1741
1742 add_token_u8(&err, dev, OPAL_ENDLIST);
1743 add_token_u8(&err, dev, OPAL_ENDNAME);
1744 add_token_u8(&err, dev, OPAL_ENDLIST);
1745
1746 if (err) {
1747 pr_debug("Error building SET command.\n");
1748 return err;
1749 }
1750 return finalize_and_send(dev, parse_and_check_status);
1751 }
1752
1753
1754 static int lock_unlock_locking_range_sum(struct opal_dev *dev, void *data)
1755 {
1756 u8 lr_buffer[OPAL_UID_LENGTH];
1757 u8 read_locked = 1, write_locked = 1;
1758 struct opal_lock_unlock *lkul = data;
1759 int ret;
1760
1761 clear_opal_cmd(dev);
1762 set_comid(dev, dev->comid);
1763
1764 if (build_locking_range(lr_buffer, sizeof(lr_buffer),
1765 lkul->session.opal_key.lr) < 0)
1766 return -ERANGE;
1767
1768 switch (lkul->l_state) {
1769 case OPAL_RO:
1770 read_locked = 0;
1771 write_locked = 1;
1772 break;
1773 case OPAL_RW:
1774 read_locked = 0;
1775 write_locked = 0;
1776 break;
1777 case OPAL_LK:
1778 /* vars are initalized to locked */
1779 break;
1780 default:
1781 pr_debug("Tried to set an invalid locking state.\n");
1782 return OPAL_INVAL_PARAM;
1783 }
1784 ret = generic_lr_enable_disable(dev, lr_buffer, 1, 1,
1785 read_locked, write_locked);
1786
1787 if (ret < 0) {
1788 pr_debug("Error building SET command.\n");
1789 return ret;
1790 }
1791 return finalize_and_send(dev, parse_and_check_status);
1792 }
1793
1794 static int activate_lsp(struct opal_dev *dev, void *data)
1795 {
1796 struct opal_lr_act *opal_act = data;
1797 u8 user_lr[OPAL_UID_LENGTH];
1798 u8 uint_3 = 0x83;
1799 int err = 0, i;
1800
1801 clear_opal_cmd(dev);
1802 set_comid(dev, dev->comid);
1803
1804 add_token_u8(&err, dev, OPAL_CALL);
1805 add_token_bytestring(&err, dev, opaluid[OPAL_LOCKINGSP_UID],
1806 OPAL_UID_LENGTH);
1807 add_token_bytestring(&err, dev, opalmethod[OPAL_ACTIVATE],
1808 OPAL_UID_LENGTH);
1809
1810
1811 if (opal_act->sum) {
1812 err = build_locking_range(user_lr, sizeof(user_lr),
1813 opal_act->lr[0]);
1814 if (err)
1815 return err;
1816
1817 add_token_u8(&err, dev, OPAL_STARTLIST);
1818 add_token_u8(&err, dev, OPAL_STARTNAME);
1819 add_token_u8(&err, dev, uint_3);
1820 add_token_u8(&err, dev, 6);
1821 add_token_u8(&err, dev, 0);
1822 add_token_u8(&err, dev, 0);
1823
1824 add_token_u8(&err, dev, OPAL_STARTLIST);
1825 add_token_bytestring(&err, dev, user_lr, OPAL_UID_LENGTH);
1826 for (i = 1; i < opal_act->num_lrs; i++) {
1827 user_lr[7] = opal_act->lr[i];
1828 add_token_bytestring(&err, dev, user_lr, OPAL_UID_LENGTH);
1829 }
1830 add_token_u8(&err, dev, OPAL_ENDLIST);
1831 add_token_u8(&err, dev, OPAL_ENDNAME);
1832 add_token_u8(&err, dev, OPAL_ENDLIST);
1833
1834 } else {
1835 add_token_u8(&err, dev, OPAL_STARTLIST);
1836 add_token_u8(&err, dev, OPAL_ENDLIST);
1837 }
1838
1839 if (err) {
1840 pr_debug("Error building Activate LockingSP command.\n");
1841 return err;
1842 }
1843
1844 return finalize_and_send(dev, parse_and_check_status);
1845 }
1846
1847 static int get_lsp_lifecycle_cont(struct opal_dev *dev)
1848 {
1849 u8 lc_status;
1850 int error = 0;
1851
1852 error = parse_and_check_status(dev);
1853 if (error)
1854 return error;
1855
1856 lc_status = response_get_u64(&dev->parsed, 4);
1857 /* 0x08 is Manufacured Inactive */
1858 /* 0x09 is Manufactured */
1859 if (lc_status != OPAL_MANUFACTURED_INACTIVE) {
1860 pr_debug("Couldn't determine the status of the Lifecycle state\n");
1861 return -ENODEV;
1862 }
1863
1864 return 0;
1865 }
1866
1867 /* Determine if we're in the Manufactured Inactive or Active state */
1868 static int get_lsp_lifecycle(struct opal_dev *dev, void *data)
1869 {
1870 int err = 0;
1871
1872 clear_opal_cmd(dev);
1873 set_comid(dev, dev->comid);
1874
1875 add_token_u8(&err, dev, OPAL_CALL);
1876 add_token_bytestring(&err, dev, opaluid[OPAL_LOCKINGSP_UID],
1877 OPAL_UID_LENGTH);
1878 add_token_bytestring(&err, dev, opalmethod[OPAL_GET], OPAL_UID_LENGTH);
1879
1880 add_token_u8(&err, dev, OPAL_STARTLIST);
1881 add_token_u8(&err, dev, OPAL_STARTLIST);
1882
1883 add_token_u8(&err, dev, OPAL_STARTNAME);
1884 add_token_u8(&err, dev, 3); /* Start Column */
1885 add_token_u8(&err, dev, 6); /* Lifecycle Column */
1886 add_token_u8(&err, dev, OPAL_ENDNAME);
1887
1888 add_token_u8(&err, dev, OPAL_STARTNAME);
1889 add_token_u8(&err, dev, 4); /* End Column */
1890 add_token_u8(&err, dev, 6); /* Lifecycle Column */
1891 add_token_u8(&err, dev, OPAL_ENDNAME);
1892
1893 add_token_u8(&err, dev, OPAL_ENDLIST);
1894 add_token_u8(&err, dev, OPAL_ENDLIST);
1895
1896 if (err) {
1897 pr_debug("Error Building GET Lifecycle Status command\n");
1898 return err;
1899 }
1900
1901 return finalize_and_send(dev, get_lsp_lifecycle_cont);
1902 }
1903
1904 static int get_msid_cpin_pin_cont(struct opal_dev *dev)
1905 {
1906 const char *msid_pin;
1907 size_t strlen;
1908 int error = 0;
1909
1910 error = parse_and_check_status(dev);
1911 if (error)
1912 return error;
1913
1914 strlen = response_get_string(&dev->parsed, 4, &msid_pin);
1915 if (!msid_pin) {
1916 pr_debug("%s: Couldn't extract PIN from response\n", __func__);
1917 return OPAL_INVAL_PARAM;
1918 }
1919
1920 dev->prev_data = kmemdup(msid_pin, strlen, GFP_KERNEL);
1921 if (!dev->prev_data)
1922 return -ENOMEM;
1923
1924 dev->prev_d_len = strlen;
1925
1926 return 0;
1927 }
1928
1929 static int get_msid_cpin_pin(struct opal_dev *dev, void *data)
1930 {
1931 int err = 0;
1932
1933 clear_opal_cmd(dev);
1934 set_comid(dev, dev->comid);
1935
1936 add_token_u8(&err, dev, OPAL_CALL);
1937 add_token_bytestring(&err, dev, opaluid[OPAL_C_PIN_MSID],
1938 OPAL_UID_LENGTH);
1939 add_token_bytestring(&err, dev, opalmethod[OPAL_GET], OPAL_UID_LENGTH);
1940
1941 add_token_u8(&err, dev, OPAL_STARTLIST);
1942 add_token_u8(&err, dev, OPAL_STARTLIST);
1943
1944 add_token_u8(&err, dev, OPAL_STARTNAME);
1945 add_token_u8(&err, dev, 3); /* Start Column */
1946 add_token_u8(&err, dev, 3); /* PIN */
1947 add_token_u8(&err, dev, OPAL_ENDNAME);
1948
1949 add_token_u8(&err, dev, OPAL_STARTNAME);
1950 add_token_u8(&err, dev, 4); /* End Column */
1951 add_token_u8(&err, dev, 3); /* Lifecycle Column */
1952 add_token_u8(&err, dev, OPAL_ENDNAME);
1953
1954 add_token_u8(&err, dev, OPAL_ENDLIST);
1955 add_token_u8(&err, dev, OPAL_ENDLIST);
1956
1957 if (err) {
1958 pr_debug("Error building Get MSID CPIN PIN command.\n");
1959 return err;
1960 }
1961
1962 return finalize_and_send(dev, get_msid_cpin_pin_cont);
1963 }
1964
1965 static int end_opal_session(struct opal_dev *dev, void *data)
1966 {
1967 int err = 0;
1968
1969 clear_opal_cmd(dev);
1970 set_comid(dev, dev->comid);
1971 add_token_u8(&err, dev, OPAL_ENDOFSESSION);
1972
1973 if (err < 0)
1974 return err;
1975 return finalize_and_send(dev, end_session_cont);
1976 }
1977
1978 static int end_opal_session_error(struct opal_dev *dev)
1979 {
1980 const struct opal_step error_end_session[] = {
1981 { end_opal_session, },
1982 { NULL, }
1983 };
1984 dev->steps = error_end_session;
1985 return next(dev);
1986 }
1987
1988 static inline void setup_opal_dev(struct opal_dev *dev,
1989 const struct opal_step *steps)
1990 {
1991 dev->steps = steps;
1992 dev->tsn = 0;
1993 dev->hsn = 0;
1994 dev->prev_data = NULL;
1995 }
1996
1997 static int check_opal_support(struct opal_dev *dev)
1998 {
1999 const struct opal_step steps[] = {
2000 { opal_discovery0, },
2001 { NULL, }
2002 };
2003 int ret;
2004
2005 mutex_lock(&dev->dev_lock);
2006 setup_opal_dev(dev, steps);
2007 ret = next(dev);
2008 dev->supported = !ret;
2009 mutex_unlock(&dev->dev_lock);
2010 return ret;
2011 }
2012
2013 static void clean_opal_dev(struct opal_dev *dev)
2014 {
2015
2016 struct opal_suspend_data *suspend, *next;
2017
2018 mutex_lock(&dev->dev_lock);
2019 list_for_each_entry_safe(suspend, next, &dev->unlk_lst, node) {
2020 list_del(&suspend->node);
2021 kfree(suspend);
2022 }
2023 mutex_unlock(&dev->dev_lock);
2024 }
2025
2026 void free_opal_dev(struct opal_dev *dev)
2027 {
2028 if (!dev)
2029 return;
2030 clean_opal_dev(dev);
2031 kfree(dev);
2032 }
2033 EXPORT_SYMBOL(free_opal_dev);
2034
2035 struct opal_dev *init_opal_dev(void *data, sec_send_recv *send_recv)
2036 {
2037 struct opal_dev *dev;
2038
2039 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
2040 if (!dev)
2041 return NULL;
2042
2043 INIT_LIST_HEAD(&dev->unlk_lst);
2044 mutex_init(&dev->dev_lock);
2045 dev->data = data;
2046 dev->send_recv = send_recv;
2047 if (check_opal_support(dev) != 0) {
2048 pr_debug("Opal is not supported on this device\n");
2049 kfree(dev);
2050 return NULL;
2051 }
2052 return dev;
2053 }
2054 EXPORT_SYMBOL(init_opal_dev);
2055
2056 static int opal_secure_erase_locking_range(struct opal_dev *dev,
2057 struct opal_session_info *opal_session)
2058 {
2059 const struct opal_step erase_steps[] = {
2060 { opal_discovery0, },
2061 { start_auth_opal_session, opal_session },
2062 { get_active_key, &opal_session->opal_key.lr },
2063 { gen_key, },
2064 { end_opal_session, },
2065 { NULL, }
2066 };
2067 int ret;
2068
2069 mutex_lock(&dev->dev_lock);
2070 setup_opal_dev(dev, erase_steps);
2071 ret = next(dev);
2072 mutex_unlock(&dev->dev_lock);
2073 return ret;
2074 }
2075
2076 static int opal_erase_locking_range(struct opal_dev *dev,
2077 struct opal_session_info *opal_session)
2078 {
2079 const struct opal_step erase_steps[] = {
2080 { opal_discovery0, },
2081 { start_auth_opal_session, opal_session },
2082 { erase_locking_range, opal_session },
2083 { end_opal_session, },
2084 { NULL, }
2085 };
2086 int ret;
2087
2088 mutex_lock(&dev->dev_lock);
2089 setup_opal_dev(dev, erase_steps);
2090 ret = next(dev);
2091 mutex_unlock(&dev->dev_lock);
2092 return ret;
2093 }
2094
2095 static int opal_enable_disable_shadow_mbr(struct opal_dev *dev,
2096 struct opal_mbr_data *opal_mbr)
2097 {
2098 u8 enable_disable = opal_mbr->enable_disable == OPAL_MBR_ENABLE ?
2099 OPAL_TRUE : OPAL_FALSE;
2100
2101 const struct opal_step mbr_steps[] = {
2102 { opal_discovery0, },
2103 { start_admin1LSP_opal_session, &opal_mbr->key },
2104 { set_mbr_done, &enable_disable },
2105 { end_opal_session, },
2106 { start_admin1LSP_opal_session, &opal_mbr->key },
2107 { set_mbr_enable_disable, &enable_disable },
2108 { end_opal_session, },
2109 { NULL, }
2110 };
2111 int ret;
2112
2113 if (opal_mbr->enable_disable != OPAL_MBR_ENABLE &&
2114 opal_mbr->enable_disable != OPAL_MBR_DISABLE)
2115 return -EINVAL;
2116
2117 mutex_lock(&dev->dev_lock);
2118 setup_opal_dev(dev, mbr_steps);
2119 ret = next(dev);
2120 mutex_unlock(&dev->dev_lock);
2121 return ret;
2122 }
2123
2124 static int opal_save(struct opal_dev *dev, struct opal_lock_unlock *lk_unlk)
2125 {
2126 struct opal_suspend_data *suspend;
2127
2128 suspend = kzalloc(sizeof(*suspend), GFP_KERNEL);
2129 if (!suspend)
2130 return -ENOMEM;
2131
2132 suspend->unlk = *lk_unlk;
2133 suspend->lr = lk_unlk->session.opal_key.lr;
2134
2135 mutex_lock(&dev->dev_lock);
2136 setup_opal_dev(dev, NULL);
2137 add_suspend_info(dev, suspend);
2138 mutex_unlock(&dev->dev_lock);
2139 return 0;
2140 }
2141
2142 static int opal_add_user_to_lr(struct opal_dev *dev,
2143 struct opal_lock_unlock *lk_unlk)
2144 {
2145 const struct opal_step steps[] = {
2146 { opal_discovery0, },
2147 { start_admin1LSP_opal_session, &lk_unlk->session.opal_key },
2148 { add_user_to_lr, lk_unlk },
2149 { end_opal_session, },
2150 { NULL, }
2151 };
2152 int ret;
2153
2154 if (lk_unlk->l_state != OPAL_RO &&
2155 lk_unlk->l_state != OPAL_RW) {
2156 pr_debug("Locking state was not RO or RW\n");
2157 return -EINVAL;
2158 }
2159 if (lk_unlk->session.who < OPAL_USER1 ||
2160 lk_unlk->session.who > OPAL_USER9) {
2161 pr_debug("Authority was not within the range of users: %d\n",
2162 lk_unlk->session.who);
2163 return -EINVAL;
2164 }
2165 if (lk_unlk->session.sum) {
2166 pr_debug("%s not supported in sum. Use setup locking range\n",
2167 __func__);
2168 return -EINVAL;
2169 }
2170
2171 mutex_lock(&dev->dev_lock);
2172 setup_opal_dev(dev, steps);
2173 ret = next(dev);
2174 mutex_unlock(&dev->dev_lock);
2175 return ret;
2176 }
2177
2178 static int opal_reverttper(struct opal_dev *dev, struct opal_key *opal)
2179 {
2180 const struct opal_step revert_steps[] = {
2181 { opal_discovery0, },
2182 { start_SIDASP_opal_session, opal },
2183 { revert_tper, }, /* controller will terminate session */
2184 { NULL, }
2185 };
2186 int ret;
2187
2188 mutex_lock(&dev->dev_lock);
2189 setup_opal_dev(dev, revert_steps);
2190 ret = next(dev);
2191 mutex_unlock(&dev->dev_lock);
2192
2193 /*
2194 * If we successfully reverted lets clean
2195 * any saved locking ranges.
2196 */
2197 if (!ret)
2198 clean_opal_dev(dev);
2199
2200 return ret;
2201 }
2202
2203 static int __opal_lock_unlock(struct opal_dev *dev,
2204 struct opal_lock_unlock *lk_unlk)
2205 {
2206 const struct opal_step unlock_steps[] = {
2207 { opal_discovery0, },
2208 { start_auth_opal_session, &lk_unlk->session },
2209 { lock_unlock_locking_range, lk_unlk },
2210 { end_opal_session, },
2211 { NULL, }
2212 };
2213 const struct opal_step unlock_sum_steps[] = {
2214 { opal_discovery0, },
2215 { start_auth_opal_session, &lk_unlk->session },
2216 { lock_unlock_locking_range_sum, lk_unlk },
2217 { end_opal_session, },
2218 { NULL, }
2219 };
2220
2221 dev->steps = lk_unlk->session.sum ? unlock_sum_steps : unlock_steps;
2222 return next(dev);
2223 }
2224
2225 static int __opal_set_mbr_done(struct opal_dev *dev, struct opal_key *key)
2226 {
2227 u8 mbr_done_tf = OPAL_TRUE;
2228 const struct opal_step mbrdone_step [] = {
2229 { opal_discovery0, },
2230 { start_admin1LSP_opal_session, key },
2231 { set_mbr_done, &mbr_done_tf },
2232 { end_opal_session, },
2233 { NULL, }
2234 };
2235
2236 dev->steps = mbrdone_step;
2237 return next(dev);
2238 }
2239
2240 static int opal_lock_unlock(struct opal_dev *dev,
2241 struct opal_lock_unlock *lk_unlk)
2242 {
2243 int ret;
2244
2245 if (lk_unlk->session.who < OPAL_ADMIN1 ||
2246 lk_unlk->session.who > OPAL_USER9)
2247 return -EINVAL;
2248
2249 mutex_lock(&dev->dev_lock);
2250 ret = __opal_lock_unlock(dev, lk_unlk);
2251 mutex_unlock(&dev->dev_lock);
2252 return ret;
2253 }
2254
2255 static int opal_take_ownership(struct opal_dev *dev, struct opal_key *opal)
2256 {
2257 const struct opal_step owner_steps[] = {
2258 { opal_discovery0, },
2259 { start_anybodyASP_opal_session, },
2260 { get_msid_cpin_pin, },
2261 { end_opal_session, },
2262 { start_SIDASP_opal_session, opal },
2263 { set_sid_cpin_pin, opal },
2264 { end_opal_session, },
2265 { NULL, }
2266 };
2267 int ret;
2268
2269 if (!dev)
2270 return -ENODEV;
2271
2272 mutex_lock(&dev->dev_lock);
2273 setup_opal_dev(dev, owner_steps);
2274 ret = next(dev);
2275 mutex_unlock(&dev->dev_lock);
2276 return ret;
2277 }
2278
2279 static int opal_activate_lsp(struct opal_dev *dev, struct opal_lr_act *opal_lr_act)
2280 {
2281 const struct opal_step active_steps[] = {
2282 { opal_discovery0, },
2283 { start_SIDASP_opal_session, &opal_lr_act->key },
2284 { get_lsp_lifecycle, },
2285 { activate_lsp, opal_lr_act },
2286 { end_opal_session, },
2287 { NULL, }
2288 };
2289 int ret;
2290
2291 if (!opal_lr_act->num_lrs || opal_lr_act->num_lrs > OPAL_MAX_LRS)
2292 return -EINVAL;
2293
2294 mutex_lock(&dev->dev_lock);
2295 setup_opal_dev(dev, active_steps);
2296 ret = next(dev);
2297 mutex_unlock(&dev->dev_lock);
2298 return ret;
2299 }
2300
2301 static int opal_setup_locking_range(struct opal_dev *dev,
2302 struct opal_user_lr_setup *opal_lrs)
2303 {
2304 const struct opal_step lr_steps[] = {
2305 { opal_discovery0, },
2306 { start_auth_opal_session, &opal_lrs->session },
2307 { setup_locking_range, opal_lrs },
2308 { end_opal_session, },
2309 { NULL, }
2310 };
2311 int ret;
2312
2313 mutex_lock(&dev->dev_lock);
2314 setup_opal_dev(dev, lr_steps);
2315 ret = next(dev);
2316 mutex_unlock(&dev->dev_lock);
2317 return ret;
2318 }
2319
2320 static int opal_set_new_pw(struct opal_dev *dev, struct opal_new_pw *opal_pw)
2321 {
2322 const struct opal_step pw_steps[] = {
2323 { opal_discovery0, },
2324 { start_auth_opal_session, &opal_pw->session },
2325 { set_new_pw, &opal_pw->new_user_pw },
2326 { end_opal_session, },
2327 { NULL }
2328 };
2329 int ret;
2330
2331 if (opal_pw->session.who < OPAL_ADMIN1 ||
2332 opal_pw->session.who > OPAL_USER9 ||
2333 opal_pw->new_user_pw.who < OPAL_ADMIN1 ||
2334 opal_pw->new_user_pw.who > OPAL_USER9)
2335 return -EINVAL;
2336
2337 mutex_lock(&dev->dev_lock);
2338 setup_opal_dev(dev, pw_steps);
2339 ret = next(dev);
2340 mutex_unlock(&dev->dev_lock);
2341 return ret;
2342 }
2343
2344 static int opal_activate_user(struct opal_dev *dev,
2345 struct opal_session_info *opal_session)
2346 {
2347 const struct opal_step act_steps[] = {
2348 { opal_discovery0, },
2349 { start_admin1LSP_opal_session, &opal_session->opal_key },
2350 { internal_activate_user, opal_session },
2351 { end_opal_session, },
2352 { NULL, }
2353 };
2354 int ret;
2355
2356 /* We can't activate Admin1 it's active as manufactured */
2357 if (opal_session->who < OPAL_USER1 ||
2358 opal_session->who > OPAL_USER9) {
2359 pr_debug("Who was not a valid user: %d\n", opal_session->who);
2360 return -EINVAL;
2361 }
2362
2363 mutex_lock(&dev->dev_lock);
2364 setup_opal_dev(dev, act_steps);
2365 ret = next(dev);
2366 mutex_unlock(&dev->dev_lock);
2367 return ret;
2368 }
2369
2370 bool opal_unlock_from_suspend(struct opal_dev *dev)
2371 {
2372 struct opal_suspend_data *suspend;
2373 bool was_failure = false;
2374 int ret = 0;
2375
2376 if (!dev)
2377 return false;
2378 if (!dev->supported)
2379 return false;
2380
2381 mutex_lock(&dev->dev_lock);
2382 setup_opal_dev(dev, NULL);
2383
2384 list_for_each_entry(suspend, &dev->unlk_lst, node) {
2385 dev->tsn = 0;
2386 dev->hsn = 0;
2387
2388 ret = __opal_lock_unlock(dev, &suspend->unlk);
2389 if (ret) {
2390 pr_debug("Failed to unlock LR %hhu with sum %d\n",
2391 suspend->unlk.session.opal_key.lr,
2392 suspend->unlk.session.sum);
2393 was_failure = true;
2394 }
2395 if (dev->mbr_enabled) {
2396 ret = __opal_set_mbr_done(dev, &suspend->unlk.session.opal_key);
2397 if (ret)
2398 pr_debug("Failed to set MBR Done in S3 resume\n");
2399 }
2400 }
2401 mutex_unlock(&dev->dev_lock);
2402 return was_failure;
2403 }
2404 EXPORT_SYMBOL(opal_unlock_from_suspend);
2405
2406 int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg)
2407 {
2408 void *p;
2409 int ret = -ENOTTY;
2410
2411 if (!capable(CAP_SYS_ADMIN))
2412 return -EACCES;
2413 if (!dev)
2414 return -ENOTSUPP;
2415 if (!dev->supported)
2416 return -ENOTSUPP;
2417
2418 p = memdup_user(arg, _IOC_SIZE(cmd));
2419 if (IS_ERR(p))
2420 return PTR_ERR(p);
2421
2422 switch (cmd) {
2423 case IOC_OPAL_SAVE:
2424 ret = opal_save(dev, p);
2425 break;
2426 case IOC_OPAL_LOCK_UNLOCK:
2427 ret = opal_lock_unlock(dev, p);
2428 break;
2429 case IOC_OPAL_TAKE_OWNERSHIP:
2430 ret = opal_take_ownership(dev, p);
2431 break;
2432 case IOC_OPAL_ACTIVATE_LSP:
2433 ret = opal_activate_lsp(dev, p);
2434 break;
2435 case IOC_OPAL_SET_PW:
2436 ret = opal_set_new_pw(dev, p);
2437 break;
2438 case IOC_OPAL_ACTIVATE_USR:
2439 ret = opal_activate_user(dev, p);
2440 break;
2441 case IOC_OPAL_REVERT_TPR:
2442 ret = opal_reverttper(dev, p);
2443 break;
2444 case IOC_OPAL_LR_SETUP:
2445 ret = opal_setup_locking_range(dev, p);
2446 break;
2447 case IOC_OPAL_ADD_USR_TO_LR:
2448 ret = opal_add_user_to_lr(dev, p);
2449 break;
2450 case IOC_OPAL_ENABLE_DISABLE_MBR:
2451 ret = opal_enable_disable_shadow_mbr(dev, p);
2452 break;
2453 case IOC_OPAL_ERASE_LR:
2454 ret = opal_erase_locking_range(dev, p);
2455 break;
2456 case IOC_OPAL_SECURE_ERASE_LR:
2457 ret = opal_secure_erase_locking_range(dev, p);
2458 break;
2459 default:
2460 break;
2461 }
2462
2463 kfree(p);
2464 return ret;
2465 }
2466 EXPORT_SYMBOL_GPL(sed_ioctl);
Linux with added FPC-III support