1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Copyright © 2016 Intel Corporation |
4 | * |
5 | * Authors: |
6 | * Scott Bauer <scott.bauer@intel.com> |
7 | * Rafael Antognolli <rafael.antognolli@intel.com> |
8 | */ |
9 | |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ":OPAL: " fmt |
11 | |
12 | #include <linux/delay.h> |
13 | #include <linux/device.h> |
14 | #include <linux/kernel.h> |
15 | #include <linux/list.h> |
16 | #include <linux/blkdev.h> |
17 | #include <linux/slab.h> |
18 | #include <linux/uaccess.h> |
19 | #include <uapi/linux/sed-opal.h> |
20 | #include <linux/sed-opal.h> |
21 | #include <linux/sed-opal-key.h> |
22 | #include <linux/string.h> |
23 | #include <linux/kdev_t.h> |
24 | #include <linux/key.h> |
25 | #include <linux/key-type.h> |
26 | #include <keys/user-type.h> |
27 | |
28 | #include "opal_proto.h" |
29 | |
30 | #define IO_BUFFER_LENGTH 2048 |
31 | #define MAX_TOKS 64 |
32 | |
33 | /* Number of bytes needed by cmd_finalize. */ |
34 | #define CMD_FINALIZE_BYTES_NEEDED 7 |
35 | |
36 | static struct key *sed_opal_keyring; |
37 | |
38 | struct opal_step { |
39 | int (*fn)(struct opal_dev *dev, void *data); |
40 | void *data; |
41 | }; |
42 | typedef int (cont_fn)(struct opal_dev *dev); |
43 | |
44 | enum opal_atom_width { |
45 | OPAL_WIDTH_TINY, |
46 | OPAL_WIDTH_SHORT, |
47 | OPAL_WIDTH_MEDIUM, |
48 | OPAL_WIDTH_LONG, |
49 | OPAL_WIDTH_TOKEN |
50 | }; |
51 | |
52 | /* |
53 | * On the parsed response, we don't store again the toks that are already |
54 | * stored in the response buffer. Instead, for each token, we just store a |
55 | * pointer to the position in the buffer where the token starts, and the size |
56 | * of the token in bytes. |
57 | */ |
58 | struct opal_resp_tok { |
59 | const u8 *pos; |
60 | size_t len; |
61 | enum opal_response_token type; |
62 | enum opal_atom_width width; |
63 | union { |
64 | u64 u; |
65 | s64 s; |
66 | } stored; |
67 | }; |
68 | |
69 | /* |
70 | * From the response header it's not possible to know how many tokens there are |
71 | * on the payload. So we hardcode that the maximum will be MAX_TOKS, and later |
72 | * if we start dealing with messages that have more than that, we can increase |
73 | * this number. This is done to avoid having to make two passes through the |
74 | * response, the first one counting how many tokens we have and the second one |
75 | * actually storing the positions. |
76 | */ |
77 | struct parsed_resp { |
78 | int num; |
79 | struct opal_resp_tok toks[MAX_TOKS]; |
80 | }; |
81 | |
82 | struct opal_dev { |
83 | u32 flags; |
84 | |
85 | void *data; |
86 | sec_send_recv *send_recv; |
87 | |
88 | struct mutex dev_lock; |
89 | u16 comid; |
90 | u32 hsn; |
91 | u32 tsn; |
92 | u64 align; /* alignment granularity */ |
93 | u64 lowest_lba; |
94 | u32 logical_block_size; |
95 | u8 align_required; /* ALIGN: 0 or 1 */ |
96 | |
97 | size_t pos; |
98 | u8 *cmd; |
99 | u8 *resp; |
100 | |
101 | struct parsed_resp parsed; |
102 | size_t prev_d_len; |
103 | void *prev_data; |
104 | |
105 | struct list_head unlk_lst; |
106 | }; |
107 | |
108 | |
109 | static const u8 opaluid[][OPAL_UID_LENGTH] = { |
110 | /* users */ |
111 | [OPAL_SMUID_UID] = |
112 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff }, |
113 | [OPAL_THISSP_UID] = |
114 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }, |
115 | [OPAL_ADMINSP_UID] = |
116 | { 0x00, 0x00, 0x02, 0x05, 0x00, 0x00, 0x00, 0x01 }, |
117 | [OPAL_LOCKINGSP_UID] = |
118 | { 0x00, 0x00, 0x02, 0x05, 0x00, 0x00, 0x00, 0x02 }, |
119 | [OPAL_ENTERPRISE_LOCKINGSP_UID] = |
120 | { 0x00, 0x00, 0x02, 0x05, 0x00, 0x01, 0x00, 0x01 }, |
121 | [OPAL_ANYBODY_UID] = |
122 | { 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x01 }, |
123 | [OPAL_SID_UID] = |
124 | { 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x06 }, |
125 | [OPAL_ADMIN1_UID] = |
126 | { 0x00, 0x00, 0x00, 0x09, 0x00, 0x01, 0x00, 0x01 }, |
127 | [OPAL_USER1_UID] = |
128 | { 0x00, 0x00, 0x00, 0x09, 0x00, 0x03, 0x00, 0x01 }, |
129 | [OPAL_USER2_UID] = |
130 | { 0x00, 0x00, 0x00, 0x09, 0x00, 0x03, 0x00, 0x02 }, |
131 | [OPAL_PSID_UID] = |
132 | { 0x00, 0x00, 0x00, 0x09, 0x00, 0x01, 0xff, 0x01 }, |
133 | [OPAL_ENTERPRISE_BANDMASTER0_UID] = |
134 | { 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x80, 0x01 }, |
135 | [OPAL_ENTERPRISE_ERASEMASTER_UID] = |
136 | { 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x84, 0x01 }, |
137 | |
138 | /* tables */ |
139 | [OPAL_TABLE_TABLE] = |
140 | { 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01 }, |
141 | [OPAL_LOCKINGRANGE_GLOBAL] = |
142 | { 0x00, 0x00, 0x08, 0x02, 0x00, 0x00, 0x00, 0x01 }, |
143 | [OPAL_LOCKINGRANGE_ACE_START_TO_KEY] = |
144 | { 0x00, 0x00, 0x00, 0x08, 0x00, 0x03, 0xD0, 0x01 }, |
145 | [OPAL_LOCKINGRANGE_ACE_RDLOCKED] = |
146 | { 0x00, 0x00, 0x00, 0x08, 0x00, 0x03, 0xE0, 0x01 }, |
147 | [OPAL_LOCKINGRANGE_ACE_WRLOCKED] = |
148 | { 0x00, 0x00, 0x00, 0x08, 0x00, 0x03, 0xE8, 0x01 }, |
149 | [OPAL_MBRCONTROL] = |
150 | { 0x00, 0x00, 0x08, 0x03, 0x00, 0x00, 0x00, 0x01 }, |
151 | [OPAL_MBR] = |
152 | { 0x00, 0x00, 0x08, 0x04, 0x00, 0x00, 0x00, 0x00 }, |
153 | [OPAL_AUTHORITY_TABLE] = |
154 | { 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x00}, |
155 | [OPAL_C_PIN_TABLE] = |
156 | { 0x00, 0x00, 0x00, 0x0B, 0x00, 0x00, 0x00, 0x00}, |
157 | [OPAL_LOCKING_INFO_TABLE] = |
158 | { 0x00, 0x00, 0x08, 0x01, 0x00, 0x00, 0x00, 0x01 }, |
159 | [OPAL_ENTERPRISE_LOCKING_INFO_TABLE] = |
160 | { 0x00, 0x00, 0x08, 0x01, 0x00, 0x00, 0x00, 0x00 }, |
161 | [OPAL_DATASTORE] = |
162 | { 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x00, 0x00 }, |
163 | |
164 | /* C_PIN_TABLE object ID's */ |
165 | [OPAL_C_PIN_MSID] = |
166 | { 0x00, 0x00, 0x00, 0x0B, 0x00, 0x00, 0x84, 0x02}, |
167 | [OPAL_C_PIN_SID] = |
168 | { 0x00, 0x00, 0x00, 0x0B, 0x00, 0x00, 0x00, 0x01}, |
169 | [OPAL_C_PIN_ADMIN1] = |
170 | { 0x00, 0x00, 0x00, 0x0B, 0x00, 0x01, 0x00, 0x01}, |
171 | |
172 | /* half UID's (only first 4 bytes used) */ |
173 | [OPAL_HALF_UID_AUTHORITY_OBJ_REF] = |
174 | { 0x00, 0x00, 0x0C, 0x05, 0xff, 0xff, 0xff, 0xff }, |
175 | [OPAL_HALF_UID_BOOLEAN_ACE] = |
176 | { 0x00, 0x00, 0x04, 0x0E, 0xff, 0xff, 0xff, 0xff }, |
177 | |
178 | /* special value for omitted optional parameter */ |
179 | [OPAL_UID_HEXFF] = |
180 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, |
181 | }; |
182 | |
183 | /* |
184 | * TCG Storage SSC Methods. |
185 | * Derived from: TCG_Storage_Architecture_Core_Spec_v2.01_r1.00 |
186 | * Section: 6.3 Assigned UIDs |
187 | */ |
188 | static const u8 opalmethod[][OPAL_METHOD_LENGTH] = { |
189 | [OPAL_PROPERTIES] = |
190 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x01 }, |
191 | [OPAL_STARTSESSION] = |
192 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x02 }, |
193 | [OPAL_REVERT] = |
194 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x02, 0x02 }, |
195 | [OPAL_ACTIVATE] = |
196 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x02, 0x03 }, |
197 | [OPAL_EGET] = |
198 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x06 }, |
199 | [OPAL_ESET] = |
200 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x07 }, |
201 | [OPAL_NEXT] = |
202 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x08 }, |
203 | [OPAL_EAUTHENTICATE] = |
204 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x0c }, |
205 | [OPAL_GETACL] = |
206 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x0d }, |
207 | [OPAL_GENKEY] = |
208 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x10 }, |
209 | [OPAL_REVERTSP] = |
210 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x11 }, |
211 | [OPAL_GET] = |
212 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x16 }, |
213 | [OPAL_SET] = |
214 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x17 }, |
215 | [OPAL_AUTHENTICATE] = |
216 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x1c }, |
217 | [OPAL_RANDOM] = |
218 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x01 }, |
219 | [OPAL_ERASE] = |
220 | { 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x08, 0x03 }, |
221 | }; |
222 | |
223 | static int end_opal_session_error(struct opal_dev *dev); |
224 | static int opal_discovery0_step(struct opal_dev *dev); |
225 | |
226 | struct opal_suspend_data { |
227 | struct opal_lock_unlock unlk; |
228 | u8 lr; |
229 | struct list_head node; |
230 | }; |
231 | |
232 | /* |
233 | * Derived from: |
234 | * TCG_Storage_Architecture_Core_Spec_v2.01_r1.00 |
235 | * Section: 5.1.5 Method Status Codes |
236 | */ |
237 | static const char * const opal_errors[] = { |
238 | "Success" , |
239 | "Not Authorized" , |
240 | "Unknown Error" , |
241 | "SP Busy" , |
242 | "SP Failed" , |
243 | "SP Disabled" , |
244 | "SP Frozen" , |
245 | "No Sessions Available" , |
246 | "Uniqueness Conflict" , |
247 | "Insufficient Space" , |
248 | "Insufficient Rows" , |
249 | "Invalid Function" , |
250 | "Invalid Parameter" , |
251 | "Invalid Reference" , |
252 | "Unknown Error" , |
253 | "TPER Malfunction" , |
254 | "Transaction Failure" , |
255 | "Response Overflow" , |
256 | "Authority Locked Out" , |
257 | }; |
258 | |
259 | static const char *opal_error_to_human(int error) |
260 | { |
261 | if (error == 0x3f) |
262 | return "Failed" ; |
263 | |
264 | if (error >= ARRAY_SIZE(opal_errors) || error < 0) |
265 | return "Unknown Error" ; |
266 | |
267 | return opal_errors[error]; |
268 | } |
269 | |
270 | static void print_buffer(const u8 *ptr, u32 length) |
271 | { |
272 | #ifdef DEBUG |
273 | print_hex_dump_bytes("OPAL: " , DUMP_PREFIX_OFFSET, ptr, length); |
274 | pr_debug("\n" ); |
275 | #endif |
276 | } |
277 | |
278 | /* |
279 | * Allocate/update a SED Opal key and add it to the SED Opal keyring. |
280 | */ |
281 | static int update_sed_opal_key(const char *desc, u_char *key_data, int keylen) |
282 | { |
283 | key_ref_t kr; |
284 | |
285 | if (!sed_opal_keyring) |
286 | return -ENOKEY; |
287 | |
288 | kr = key_create_or_update(keyring: make_key_ref(key: sed_opal_keyring, possession: true), type: "user" , |
289 | description: desc, payload: (const void *)key_data, plen: keylen, |
290 | KEY_USR_VIEW | KEY_USR_SEARCH | KEY_USR_WRITE, |
291 | KEY_ALLOC_NOT_IN_QUOTA | KEY_ALLOC_BUILT_IN | |
292 | KEY_ALLOC_BYPASS_RESTRICTION); |
293 | if (IS_ERR(ptr: kr)) { |
294 | pr_err("Error adding SED key (%ld)\n" , PTR_ERR(kr)); |
295 | return PTR_ERR(ptr: kr); |
296 | } |
297 | |
298 | return 0; |
299 | } |
300 | |
301 | /* |
302 | * Read a SED Opal key from the SED Opal keyring. |
303 | */ |
304 | static int read_sed_opal_key(const char *key_name, u_char *buffer, int buflen) |
305 | { |
306 | int ret; |
307 | key_ref_t kref; |
308 | struct key *key; |
309 | |
310 | if (!sed_opal_keyring) |
311 | return -ENOKEY; |
312 | |
313 | kref = keyring_search(keyring: make_key_ref(key: sed_opal_keyring, possession: true), |
314 | type: &key_type_user, description: key_name, recurse: true); |
315 | |
316 | if (IS_ERR(ptr: kref)) |
317 | ret = PTR_ERR(ptr: kref); |
318 | |
319 | key = key_ref_to_ptr(key_ref: kref); |
320 | down_read(sem: &key->sem); |
321 | ret = key_validate(key); |
322 | if (ret == 0) { |
323 | if (buflen > key->datalen) |
324 | buflen = key->datalen; |
325 | |
326 | ret = key->type->read(key, (char *)buffer, buflen); |
327 | } |
328 | up_read(sem: &key->sem); |
329 | |
330 | key_ref_put(key_ref: kref); |
331 | |
332 | return ret; |
333 | } |
334 | |
335 | static int opal_get_key(struct opal_dev *dev, struct opal_key *key) |
336 | { |
337 | int ret = 0; |
338 | |
339 | switch (key->key_type) { |
340 | case OPAL_INCLUDED: |
341 | /* the key is ready to use */ |
342 | break; |
343 | case OPAL_KEYRING: |
344 | /* the key is in the keyring */ |
345 | ret = read_sed_opal_key(OPAL_AUTH_KEY, buffer: key->key, OPAL_KEY_MAX); |
346 | if (ret > 0) { |
347 | if (ret > U8_MAX) { |
348 | ret = -ENOSPC; |
349 | goto error; |
350 | } |
351 | key->key_len = ret; |
352 | key->key_type = OPAL_INCLUDED; |
353 | } |
354 | break; |
355 | default: |
356 | ret = -EINVAL; |
357 | break; |
358 | } |
359 | if (ret < 0) |
360 | goto error; |
361 | |
362 | /* must have a PEK by now or it's an error */ |
363 | if (key->key_type != OPAL_INCLUDED || key->key_len == 0) { |
364 | ret = -EINVAL; |
365 | goto error; |
366 | } |
367 | return 0; |
368 | error: |
369 | pr_debug("Error getting password: %d\n" , ret); |
370 | return ret; |
371 | } |
372 | |
373 | static bool check_tper(const void *data) |
374 | { |
375 | const struct d0_tper_features *tper = data; |
376 | u8 flags = tper->supported_features; |
377 | |
378 | if (!(flags & TPER_SYNC_SUPPORTED)) { |
379 | pr_debug("TPer sync not supported. flags = %d\n" , |
380 | tper->supported_features); |
381 | return false; |
382 | } |
383 | |
384 | return true; |
385 | } |
386 | |
387 | static bool check_lcksuppt(const void *data) |
388 | { |
389 | const struct d0_locking_features *lfeat = data; |
390 | u8 sup_feat = lfeat->supported_features; |
391 | |
392 | return !!(sup_feat & LOCKING_SUPPORTED_MASK); |
393 | } |
394 | |
395 | static bool check_lckenabled(const void *data) |
396 | { |
397 | const struct d0_locking_features *lfeat = data; |
398 | u8 sup_feat = lfeat->supported_features; |
399 | |
400 | return !!(sup_feat & LOCKING_ENABLED_MASK); |
401 | } |
402 | |
403 | static bool check_locked(const void *data) |
404 | { |
405 | const struct d0_locking_features *lfeat = data; |
406 | u8 sup_feat = lfeat->supported_features; |
407 | |
408 | return !!(sup_feat & LOCKED_MASK); |
409 | } |
410 | |
411 | static bool check_mbrenabled(const void *data) |
412 | { |
413 | const struct d0_locking_features *lfeat = data; |
414 | u8 sup_feat = lfeat->supported_features; |
415 | |
416 | return !!(sup_feat & MBR_ENABLED_MASK); |
417 | } |
418 | |
419 | static bool check_mbrdone(const void *data) |
420 | { |
421 | const struct d0_locking_features *lfeat = data; |
422 | u8 sup_feat = lfeat->supported_features; |
423 | |
424 | return !!(sup_feat & MBR_DONE_MASK); |
425 | } |
426 | |
427 | static bool check_sum(const void *data) |
428 | { |
429 | const struct d0_single_user_mode *sum = data; |
430 | u32 nlo = be32_to_cpu(sum->num_locking_objects); |
431 | |
432 | if (nlo == 0) { |
433 | pr_debug("Need at least one locking object.\n" ); |
434 | return false; |
435 | } |
436 | |
437 | pr_debug("Number of locking objects: %d\n" , nlo); |
438 | |
439 | return true; |
440 | } |
441 | |
442 | static u16 get_comid_v100(const void *data) |
443 | { |
444 | const struct d0_opal_v100 *v100 = data; |
445 | |
446 | return be16_to_cpu(v100->baseComID); |
447 | } |
448 | |
449 | static u16 get_comid_v200(const void *data) |
450 | { |
451 | const struct d0_opal_v200 *v200 = data; |
452 | |
453 | return be16_to_cpu(v200->baseComID); |
454 | } |
455 | |
456 | static int opal_send_cmd(struct opal_dev *dev) |
457 | { |
458 | return dev->send_recv(dev->data, dev->comid, TCG_SECP_01, |
459 | dev->cmd, IO_BUFFER_LENGTH, |
460 | true); |
461 | } |
462 | |
463 | static int opal_recv_cmd(struct opal_dev *dev) |
464 | { |
465 | return dev->send_recv(dev->data, dev->comid, TCG_SECP_01, |
466 | dev->resp, IO_BUFFER_LENGTH, |
467 | false); |
468 | } |
469 | |
470 | static int opal_recv_check(struct opal_dev *dev) |
471 | { |
472 | size_t buflen = IO_BUFFER_LENGTH; |
473 | void *buffer = dev->resp; |
474 | struct opal_header *hdr = buffer; |
475 | int ret; |
476 | |
477 | do { |
478 | pr_debug("Sent OPAL command: outstanding=%d, minTransfer=%d\n" , |
479 | hdr->cp.outstandingData, |
480 | hdr->cp.minTransfer); |
481 | |
482 | if (hdr->cp.outstandingData == 0 || |
483 | hdr->cp.minTransfer != 0) |
484 | return 0; |
485 | |
486 | memset(buffer, 0, buflen); |
487 | ret = opal_recv_cmd(dev); |
488 | } while (!ret); |
489 | |
490 | return ret; |
491 | } |
492 | |
493 | static int opal_send_recv(struct opal_dev *dev, cont_fn *cont) |
494 | { |
495 | int ret; |
496 | |
497 | ret = opal_send_cmd(dev); |
498 | if (ret) |
499 | return ret; |
500 | ret = opal_recv_cmd(dev); |
501 | if (ret) |
502 | return ret; |
503 | ret = opal_recv_check(dev); |
504 | if (ret) |
505 | return ret; |
506 | return cont(dev); |
507 | } |
508 | |
509 | static void check_geometry(struct opal_dev *dev, const void *data) |
510 | { |
511 | const struct d0_geometry_features *geo = data; |
512 | |
513 | dev->align = be64_to_cpu(geo->alignment_granularity); |
514 | dev->lowest_lba = be64_to_cpu(geo->lowest_aligned_lba); |
515 | dev->logical_block_size = be32_to_cpu(geo->logical_block_size); |
516 | dev->align_required = geo->reserved01 & 1; |
517 | } |
518 | |
519 | static int execute_step(struct opal_dev *dev, |
520 | const struct opal_step *step, size_t stepIndex) |
521 | { |
522 | int error = step->fn(dev, step->data); |
523 | |
524 | if (error) { |
525 | pr_debug("Step %zu (%pS) failed with error %d: %s\n" , |
526 | stepIndex, step->fn, error, |
527 | opal_error_to_human(error)); |
528 | } |
529 | |
530 | return error; |
531 | } |
532 | |
533 | static int execute_steps(struct opal_dev *dev, |
534 | const struct opal_step *steps, size_t n_steps) |
535 | { |
536 | size_t state = 0; |
537 | int error; |
538 | |
539 | /* first do a discovery0 */ |
540 | error = opal_discovery0_step(dev); |
541 | if (error) |
542 | return error; |
543 | |
544 | for (state = 0; state < n_steps; state++) { |
545 | error = execute_step(dev, step: &steps[state], stepIndex: state); |
546 | if (error) |
547 | goto out_error; |
548 | } |
549 | |
550 | return 0; |
551 | |
552 | out_error: |
553 | /* |
554 | * For each OPAL command the first step in steps starts some sort of |
555 | * session. If an error occurred in the initial discovery0 or if an |
556 | * error occurred in the first step (and thus stopping the loop with |
557 | * state == 0) then there was an error before or during the attempt to |
558 | * start a session. Therefore we shouldn't attempt to terminate a |
559 | * session, as one has not yet been created. |
560 | */ |
561 | if (state > 0) |
562 | end_opal_session_error(dev); |
563 | |
564 | return error; |
565 | } |
566 | |
567 | static int opal_discovery0_end(struct opal_dev *dev, void *data) |
568 | { |
569 | struct opal_discovery *discv_out = data; /* may be NULL */ |
570 | u8 __user *buf_out; |
571 | u64 len_out; |
572 | bool found_com_id = false, supported = true, single_user = false; |
573 | const struct d0_header *hdr = (struct d0_header *)dev->resp; |
574 | const u8 *epos = dev->resp, *cpos = dev->resp; |
575 | u16 comid = 0; |
576 | u32 hlen = be32_to_cpu(hdr->length); |
577 | |
578 | print_buffer(ptr: dev->resp, length: hlen); |
579 | dev->flags &= OPAL_FL_SUPPORTED; |
580 | |
581 | if (hlen > IO_BUFFER_LENGTH - sizeof(*hdr)) { |
582 | pr_debug("Discovery length overflows buffer (%zu+%u)/%u\n" , |
583 | sizeof(*hdr), hlen, IO_BUFFER_LENGTH); |
584 | return -EFAULT; |
585 | } |
586 | |
587 | if (discv_out) { |
588 | buf_out = (u8 __user *)(uintptr_t)discv_out->data; |
589 | len_out = min_t(u64, discv_out->size, hlen); |
590 | if (buf_out && copy_to_user(to: buf_out, from: dev->resp, n: len_out)) |
591 | return -EFAULT; |
592 | |
593 | discv_out->size = hlen; /* actual size of data */ |
594 | } |
595 | |
596 | epos += hlen; /* end of buffer */ |
597 | cpos += sizeof(*hdr); /* current position on buffer */ |
598 | |
599 | while (cpos < epos && supported) { |
600 | const struct d0_features *body = |
601 | (const struct d0_features *)cpos; |
602 | |
603 | switch (be16_to_cpu(body->code)) { |
604 | case FC_TPER: |
605 | supported = check_tper(data: body->features); |
606 | break; |
607 | case FC_SINGLEUSER: |
608 | single_user = check_sum(data: body->features); |
609 | if (single_user) |
610 | dev->flags |= OPAL_FL_SUM_SUPPORTED; |
611 | break; |
612 | case FC_GEOMETRY: |
613 | check_geometry(dev, data: body); |
614 | break; |
615 | case FC_LOCKING: |
616 | if (check_lcksuppt(data: body->features)) |
617 | dev->flags |= OPAL_FL_LOCKING_SUPPORTED; |
618 | if (check_lckenabled(data: body->features)) |
619 | dev->flags |= OPAL_FL_LOCKING_ENABLED; |
620 | if (check_locked(data: body->features)) |
621 | dev->flags |= OPAL_FL_LOCKED; |
622 | if (check_mbrenabled(data: body->features)) |
623 | dev->flags |= OPAL_FL_MBR_ENABLED; |
624 | if (check_mbrdone(data: body->features)) |
625 | dev->flags |= OPAL_FL_MBR_DONE; |
626 | break; |
627 | case FC_ENTERPRISE: |
628 | case FC_DATASTORE: |
629 | /* some ignored properties */ |
630 | pr_debug("Found OPAL feature description: %d\n" , |
631 | be16_to_cpu(body->code)); |
632 | break; |
633 | case FC_OPALV100: |
634 | comid = get_comid_v100(data: body->features); |
635 | found_com_id = true; |
636 | break; |
637 | case FC_OPALV200: |
638 | comid = get_comid_v200(data: body->features); |
639 | found_com_id = true; |
640 | break; |
641 | case 0xbfff ... 0xffff: |
642 | /* vendor specific, just ignore */ |
643 | break; |
644 | default: |
645 | pr_debug("OPAL Unknown feature: %d\n" , |
646 | be16_to_cpu(body->code)); |
647 | |
648 | } |
649 | cpos += body->length + 4; |
650 | } |
651 | |
652 | if (!supported) { |
653 | pr_debug("This device is not Opal enabled. Not Supported!\n" ); |
654 | return -EOPNOTSUPP; |
655 | } |
656 | |
657 | if (!single_user) |
658 | pr_debug("Device doesn't support single user mode\n" ); |
659 | |
660 | |
661 | if (!found_com_id) { |
662 | pr_debug("Could not find OPAL comid for device. Returning early\n" ); |
663 | return -EOPNOTSUPP; |
664 | } |
665 | |
666 | dev->comid = comid; |
667 | |
668 | return 0; |
669 | } |
670 | |
671 | static int opal_discovery0(struct opal_dev *dev, void *data) |
672 | { |
673 | int ret; |
674 | |
675 | memset(dev->resp, 0, IO_BUFFER_LENGTH); |
676 | dev->comid = OPAL_DISCOVERY_COMID; |
677 | ret = opal_recv_cmd(dev); |
678 | if (ret) |
679 | return ret; |
680 | |
681 | return opal_discovery0_end(dev, data); |
682 | } |
683 | |
684 | static int opal_discovery0_step(struct opal_dev *dev) |
685 | { |
686 | const struct opal_step discovery0_step = { |
687 | opal_discovery0, NULL |
688 | }; |
689 | |
690 | return execute_step(dev, step: &discovery0_step, stepIndex: 0); |
691 | } |
692 | |
693 | static size_t remaining_size(struct opal_dev *cmd) |
694 | { |
695 | return IO_BUFFER_LENGTH - cmd->pos; |
696 | } |
697 | |
698 | static bool can_add(int *err, struct opal_dev *cmd, size_t len) |
699 | { |
700 | if (*err) |
701 | return false; |
702 | |
703 | if (remaining_size(cmd) < len) { |
704 | pr_debug("Error adding %zu bytes: end of buffer.\n" , len); |
705 | *err = -ERANGE; |
706 | return false; |
707 | } |
708 | |
709 | return true; |
710 | } |
711 | |
712 | static void add_token_u8(int *err, struct opal_dev *cmd, u8 tok) |
713 | { |
714 | if (!can_add(err, cmd, len: 1)) |
715 | return; |
716 | |
717 | cmd->cmd[cmd->pos++] = tok; |
718 | } |
719 | |
720 | static void (struct opal_dev *cmd, bool bytestring, |
721 | bool has_sign, int len) |
722 | { |
723 | u8 atom; |
724 | int err = 0; |
725 | |
726 | atom = SHORT_ATOM_ID; |
727 | atom |= bytestring ? SHORT_ATOM_BYTESTRING : 0; |
728 | atom |= has_sign ? SHORT_ATOM_SIGNED : 0; |
729 | atom |= len & SHORT_ATOM_LEN_MASK; |
730 | |
731 | add_token_u8(err: &err, cmd, tok: atom); |
732 | } |
733 | |
734 | static void (struct opal_dev *cmd, bool bytestring, |
735 | bool has_sign, int len) |
736 | { |
737 | u8 ; |
738 | |
739 | header0 = MEDIUM_ATOM_ID; |
740 | header0 |= bytestring ? MEDIUM_ATOM_BYTESTRING : 0; |
741 | header0 |= has_sign ? MEDIUM_ATOM_SIGNED : 0; |
742 | header0 |= (len >> 8) & MEDIUM_ATOM_LEN_MASK; |
743 | |
744 | cmd->cmd[cmd->pos++] = header0; |
745 | cmd->cmd[cmd->pos++] = len; |
746 | } |
747 | |
748 | static void add_token_u64(int *err, struct opal_dev *cmd, u64 number) |
749 | { |
750 | size_t len; |
751 | int msb; |
752 | |
753 | if (!(number & ~TINY_ATOM_DATA_MASK)) { |
754 | add_token_u8(err, cmd, tok: number); |
755 | return; |
756 | } |
757 | |
758 | msb = fls64(x: number); |
759 | len = DIV_ROUND_UP(msb, 8); |
760 | |
761 | if (!can_add(err, cmd, len: len + 1)) { |
762 | pr_debug("Error adding u64: end of buffer.\n" ); |
763 | return; |
764 | } |
765 | add_short_atom_header(cmd, bytestring: false, has_sign: false, len); |
766 | while (len--) |
767 | add_token_u8(err, cmd, tok: number >> (len * 8)); |
768 | } |
769 | |
770 | static u8 *(int *err, struct opal_dev *cmd, size_t len) |
771 | { |
772 | size_t = 1; |
773 | bool is_short_atom = true; |
774 | |
775 | if (len & ~SHORT_ATOM_LEN_MASK) { |
776 | header_len = 2; |
777 | is_short_atom = false; |
778 | } |
779 | |
780 | if (!can_add(err, cmd, len: header_len + len)) { |
781 | pr_debug("Error adding bytestring: end of buffer.\n" ); |
782 | return NULL; |
783 | } |
784 | |
785 | if (is_short_atom) |
786 | add_short_atom_header(cmd, bytestring: true, has_sign: false, len); |
787 | else |
788 | add_medium_atom_header(cmd, bytestring: true, has_sign: false, len); |
789 | |
790 | return &cmd->cmd[cmd->pos]; |
791 | } |
792 | |
793 | static void add_token_bytestring(int *err, struct opal_dev *cmd, |
794 | const u8 *bytestring, size_t len) |
795 | { |
796 | u8 *start; |
797 | |
798 | start = add_bytestring_header(err, cmd, len); |
799 | if (!start) |
800 | return; |
801 | memcpy(start, bytestring, len); |
802 | cmd->pos += len; |
803 | } |
804 | |
805 | static int build_locking_range(u8 *buffer, size_t length, u8 lr) |
806 | { |
807 | if (length > OPAL_UID_LENGTH) { |
808 | pr_debug("Can't build locking range. Length OOB\n" ); |
809 | return -ERANGE; |
810 | } |
811 | |
812 | memcpy(buffer, opaluid[OPAL_LOCKINGRANGE_GLOBAL], OPAL_UID_LENGTH); |
813 | |
814 | if (lr == 0) |
815 | return 0; |
816 | |
817 | buffer[5] = LOCKING_RANGE_NON_GLOBAL; |
818 | buffer[7] = lr; |
819 | |
820 | return 0; |
821 | } |
822 | |
823 | static int build_locking_user(u8 *buffer, size_t length, u8 lr) |
824 | { |
825 | if (length > OPAL_UID_LENGTH) { |
826 | pr_debug("Can't build locking range user. Length OOB\n" ); |
827 | return -ERANGE; |
828 | } |
829 | |
830 | memcpy(buffer, opaluid[OPAL_USER1_UID], OPAL_UID_LENGTH); |
831 | |
832 | buffer[7] = lr + 1; |
833 | |
834 | return 0; |
835 | } |
836 | |
837 | static void set_comid(struct opal_dev *cmd, u16 comid) |
838 | { |
839 | struct opal_header *hdr = (struct opal_header *)cmd->cmd; |
840 | |
841 | hdr->cp.extendedComID[0] = comid >> 8; |
842 | hdr->cp.extendedComID[1] = comid; |
843 | hdr->cp.extendedComID[2] = 0; |
844 | hdr->cp.extendedComID[3] = 0; |
845 | } |
846 | |
847 | static int cmd_finalize(struct opal_dev *cmd, u32 hsn, u32 tsn) |
848 | { |
849 | struct opal_header *hdr; |
850 | int err = 0; |
851 | |
852 | /* |
853 | * Close the parameter list opened from cmd_start. |
854 | * The number of bytes added must be equal to |
855 | * CMD_FINALIZE_BYTES_NEEDED. |
856 | */ |
857 | add_token_u8(err: &err, cmd, tok: OPAL_ENDLIST); |
858 | |
859 | add_token_u8(err: &err, cmd, tok: OPAL_ENDOFDATA); |
860 | add_token_u8(err: &err, cmd, tok: OPAL_STARTLIST); |
861 | add_token_u8(err: &err, cmd, tok: 0); |
862 | add_token_u8(err: &err, cmd, tok: 0); |
863 | add_token_u8(err: &err, cmd, tok: 0); |
864 | add_token_u8(err: &err, cmd, tok: OPAL_ENDLIST); |
865 | |
866 | if (err) { |
867 | pr_debug("Error finalizing command.\n" ); |
868 | return -EFAULT; |
869 | } |
870 | |
871 | hdr = (struct opal_header *) cmd->cmd; |
872 | |
873 | hdr->pkt.tsn = cpu_to_be32(tsn); |
874 | hdr->pkt.hsn = cpu_to_be32(hsn); |
875 | |
876 | hdr->subpkt.length = cpu_to_be32(cmd->pos - sizeof(*hdr)); |
877 | while (cmd->pos % 4) { |
878 | if (cmd->pos >= IO_BUFFER_LENGTH) { |
879 | pr_debug("Error: Buffer overrun\n" ); |
880 | return -ERANGE; |
881 | } |
882 | cmd->cmd[cmd->pos++] = 0; |
883 | } |
884 | hdr->pkt.length = cpu_to_be32(cmd->pos - sizeof(hdr->cp) - |
885 | sizeof(hdr->pkt)); |
886 | hdr->cp.length = cpu_to_be32(cmd->pos - sizeof(hdr->cp)); |
887 | |
888 | return 0; |
889 | } |
890 | |
891 | static const struct opal_resp_tok *response_get_token( |
892 | const struct parsed_resp *resp, |
893 | int n) |
894 | { |
895 | const struct opal_resp_tok *tok; |
896 | |
897 | if (!resp) { |
898 | pr_debug("Response is NULL\n" ); |
899 | return ERR_PTR(error: -EINVAL); |
900 | } |
901 | |
902 | if (n >= resp->num) { |
903 | pr_debug("Token number doesn't exist: %d, resp: %d\n" , |
904 | n, resp->num); |
905 | return ERR_PTR(error: -EINVAL); |
906 | } |
907 | |
908 | tok = &resp->toks[n]; |
909 | if (tok->len == 0) { |
910 | pr_debug("Token length must be non-zero\n" ); |
911 | return ERR_PTR(error: -EINVAL); |
912 | } |
913 | |
914 | return tok; |
915 | } |
916 | |
917 | static ssize_t response_parse_tiny(struct opal_resp_tok *tok, |
918 | const u8 *pos) |
919 | { |
920 | tok->pos = pos; |
921 | tok->len = 1; |
922 | tok->width = OPAL_WIDTH_TINY; |
923 | |
924 | if (pos[0] & TINY_ATOM_SIGNED) { |
925 | tok->type = OPAL_DTA_TOKENID_SINT; |
926 | } else { |
927 | tok->type = OPAL_DTA_TOKENID_UINT; |
928 | tok->stored.u = pos[0] & 0x3f; |
929 | } |
930 | |
931 | return tok->len; |
932 | } |
933 | |
934 | static ssize_t response_parse_short(struct opal_resp_tok *tok, |
935 | const u8 *pos) |
936 | { |
937 | tok->pos = pos; |
938 | tok->len = (pos[0] & SHORT_ATOM_LEN_MASK) + 1; |
939 | tok->width = OPAL_WIDTH_SHORT; |
940 | |
941 | if (pos[0] & SHORT_ATOM_BYTESTRING) { |
942 | tok->type = OPAL_DTA_TOKENID_BYTESTRING; |
943 | } else if (pos[0] & SHORT_ATOM_SIGNED) { |
944 | tok->type = OPAL_DTA_TOKENID_SINT; |
945 | } else { |
946 | u64 u_integer = 0; |
947 | ssize_t i, b = 0; |
948 | |
949 | tok->type = OPAL_DTA_TOKENID_UINT; |
950 | if (tok->len > 9) { |
951 | pr_debug("uint64 with more than 8 bytes\n" ); |
952 | return -EINVAL; |
953 | } |
954 | for (i = tok->len - 1; i > 0; i--) { |
955 | u_integer |= ((u64)pos[i] << (8 * b)); |
956 | b++; |
957 | } |
958 | tok->stored.u = u_integer; |
959 | } |
960 | |
961 | return tok->len; |
962 | } |
963 | |
964 | static ssize_t response_parse_medium(struct opal_resp_tok *tok, |
965 | const u8 *pos) |
966 | { |
967 | tok->pos = pos; |
968 | tok->len = (((pos[0] & MEDIUM_ATOM_LEN_MASK) << 8) | pos[1]) + 2; |
969 | tok->width = OPAL_WIDTH_MEDIUM; |
970 | |
971 | if (pos[0] & MEDIUM_ATOM_BYTESTRING) |
972 | tok->type = OPAL_DTA_TOKENID_BYTESTRING; |
973 | else if (pos[0] & MEDIUM_ATOM_SIGNED) |
974 | tok->type = OPAL_DTA_TOKENID_SINT; |
975 | else |
976 | tok->type = OPAL_DTA_TOKENID_UINT; |
977 | |
978 | return tok->len; |
979 | } |
980 | |
981 | static ssize_t response_parse_long(struct opal_resp_tok *tok, |
982 | const u8 *pos) |
983 | { |
984 | tok->pos = pos; |
985 | tok->len = ((pos[1] << 16) | (pos[2] << 8) | pos[3]) + 4; |
986 | tok->width = OPAL_WIDTH_LONG; |
987 | |
988 | if (pos[0] & LONG_ATOM_BYTESTRING) |
989 | tok->type = OPAL_DTA_TOKENID_BYTESTRING; |
990 | else if (pos[0] & LONG_ATOM_SIGNED) |
991 | tok->type = OPAL_DTA_TOKENID_SINT; |
992 | else |
993 | tok->type = OPAL_DTA_TOKENID_UINT; |
994 | |
995 | return tok->len; |
996 | } |
997 | |
998 | static ssize_t response_parse_token(struct opal_resp_tok *tok, |
999 | const u8 *pos) |
1000 | { |
1001 | tok->pos = pos; |
1002 | tok->len = 1; |
1003 | tok->type = OPAL_DTA_TOKENID_TOKEN; |
1004 | tok->width = OPAL_WIDTH_TOKEN; |
1005 | |
1006 | return tok->len; |
1007 | } |
1008 | |
1009 | static int response_parse(const u8 *buf, size_t length, |
1010 | struct parsed_resp *resp) |
1011 | { |
1012 | const struct opal_header *hdr; |
1013 | struct opal_resp_tok *iter; |
1014 | int num_entries = 0; |
1015 | int total; |
1016 | ssize_t token_length; |
1017 | const u8 *pos; |
1018 | u32 clen, plen, slen; |
1019 | |
1020 | if (!buf) |
1021 | return -EFAULT; |
1022 | |
1023 | if (!resp) |
1024 | return -EFAULT; |
1025 | |
1026 | hdr = (struct opal_header *)buf; |
1027 | pos = buf; |
1028 | pos += sizeof(*hdr); |
1029 | |
1030 | clen = be32_to_cpu(hdr->cp.length); |
1031 | plen = be32_to_cpu(hdr->pkt.length); |
1032 | slen = be32_to_cpu(hdr->subpkt.length); |
1033 | pr_debug("Response size: cp: %u, pkt: %u, subpkt: %u\n" , |
1034 | clen, plen, slen); |
1035 | |
1036 | if (clen == 0 || plen == 0 || slen == 0 || |
1037 | slen > IO_BUFFER_LENGTH - sizeof(*hdr)) { |
1038 | pr_debug("Bad header length. cp: %u, pkt: %u, subpkt: %u\n" , |
1039 | clen, plen, slen); |
1040 | print_buffer(ptr: pos, length: sizeof(*hdr)); |
1041 | return -EINVAL; |
1042 | } |
1043 | |
1044 | if (pos > buf + length) |
1045 | return -EFAULT; |
1046 | |
1047 | iter = resp->toks; |
1048 | total = slen; |
1049 | print_buffer(ptr: pos, length: total); |
1050 | while (total > 0) { |
1051 | if (pos[0] <= TINY_ATOM_BYTE) /* tiny atom */ |
1052 | token_length = response_parse_tiny(tok: iter, pos); |
1053 | else if (pos[0] <= SHORT_ATOM_BYTE) /* short atom */ |
1054 | token_length = response_parse_short(tok: iter, pos); |
1055 | else if (pos[0] <= MEDIUM_ATOM_BYTE) /* medium atom */ |
1056 | token_length = response_parse_medium(tok: iter, pos); |
1057 | else if (pos[0] <= LONG_ATOM_BYTE) /* long atom */ |
1058 | token_length = response_parse_long(tok: iter, pos); |
1059 | else if (pos[0] == EMPTY_ATOM_BYTE) /* empty atom */ |
1060 | token_length = 1; |
1061 | else /* TOKEN */ |
1062 | token_length = response_parse_token(tok: iter, pos); |
1063 | |
1064 | if (token_length < 0) |
1065 | return token_length; |
1066 | |
1067 | if (pos[0] != EMPTY_ATOM_BYTE) |
1068 | num_entries++; |
1069 | |
1070 | pos += token_length; |
1071 | total -= token_length; |
1072 | iter++; |
1073 | } |
1074 | |
1075 | resp->num = num_entries; |
1076 | |
1077 | return 0; |
1078 | } |
1079 | |
1080 | static size_t response_get_string(const struct parsed_resp *resp, int n, |
1081 | const char **store) |
1082 | { |
1083 | u8 skip; |
1084 | const struct opal_resp_tok *tok; |
1085 | |
1086 | *store = NULL; |
1087 | tok = response_get_token(resp, n); |
1088 | if (IS_ERR(ptr: tok)) |
1089 | return 0; |
1090 | |
1091 | if (tok->type != OPAL_DTA_TOKENID_BYTESTRING) { |
1092 | pr_debug("Token is not a byte string!\n" ); |
1093 | return 0; |
1094 | } |
1095 | |
1096 | switch (tok->width) { |
1097 | case OPAL_WIDTH_TINY: |
1098 | case OPAL_WIDTH_SHORT: |
1099 | skip = 1; |
1100 | break; |
1101 | case OPAL_WIDTH_MEDIUM: |
1102 | skip = 2; |
1103 | break; |
1104 | case OPAL_WIDTH_LONG: |
1105 | skip = 4; |
1106 | break; |
1107 | default: |
1108 | pr_debug("Token has invalid width!\n" ); |
1109 | return 0; |
1110 | } |
1111 | |
1112 | *store = tok->pos + skip; |
1113 | |
1114 | return tok->len - skip; |
1115 | } |
1116 | |
1117 | static u64 response_get_u64(const struct parsed_resp *resp, int n) |
1118 | { |
1119 | const struct opal_resp_tok *tok; |
1120 | |
1121 | tok = response_get_token(resp, n); |
1122 | if (IS_ERR(ptr: tok)) |
1123 | return 0; |
1124 | |
1125 | if (tok->type != OPAL_DTA_TOKENID_UINT) { |
1126 | pr_debug("Token is not unsigned int: %d\n" , tok->type); |
1127 | return 0; |
1128 | } |
1129 | |
1130 | if (tok->width != OPAL_WIDTH_TINY && tok->width != OPAL_WIDTH_SHORT) { |
1131 | pr_debug("Atom is not short or tiny: %d\n" , tok->width); |
1132 | return 0; |
1133 | } |
1134 | |
1135 | return tok->stored.u; |
1136 | } |
1137 | |
1138 | static bool response_token_matches(const struct opal_resp_tok *token, u8 match) |
1139 | { |
1140 | if (IS_ERR(ptr: token) || |
1141 | token->type != OPAL_DTA_TOKENID_TOKEN || |
1142 | token->pos[0] != match) |
1143 | return false; |
1144 | return true; |
1145 | } |
1146 | |
1147 | static u8 response_status(const struct parsed_resp *resp) |
1148 | { |
1149 | const struct opal_resp_tok *tok; |
1150 | |
1151 | tok = response_get_token(resp, n: 0); |
1152 | if (response_token_matches(token: tok, match: OPAL_ENDOFSESSION)) |
1153 | return 0; |
1154 | |
1155 | if (resp->num < 5) |
1156 | return DTAERROR_NO_METHOD_STATUS; |
1157 | |
1158 | tok = response_get_token(resp, n: resp->num - 5); |
1159 | if (!response_token_matches(token: tok, match: OPAL_STARTLIST)) |
1160 | return DTAERROR_NO_METHOD_STATUS; |
1161 | |
1162 | tok = response_get_token(resp, n: resp->num - 1); |
1163 | if (!response_token_matches(token: tok, match: OPAL_ENDLIST)) |
1164 | return DTAERROR_NO_METHOD_STATUS; |
1165 | |
1166 | return response_get_u64(resp, n: resp->num - 4); |
1167 | } |
1168 | |
1169 | /* Parses and checks for errors */ |
1170 | static int parse_and_check_status(struct opal_dev *dev) |
1171 | { |
1172 | int error; |
1173 | |
1174 | print_buffer(ptr: dev->cmd, length: dev->pos); |
1175 | |
1176 | error = response_parse(buf: dev->resp, IO_BUFFER_LENGTH, resp: &dev->parsed); |
1177 | if (error) { |
1178 | pr_debug("Couldn't parse response.\n" ); |
1179 | return error; |
1180 | } |
1181 | |
1182 | return response_status(resp: &dev->parsed); |
1183 | } |
1184 | |
1185 | static void clear_opal_cmd(struct opal_dev *dev) |
1186 | { |
1187 | dev->pos = sizeof(struct opal_header); |
1188 | memset(dev->cmd, 0, IO_BUFFER_LENGTH); |
1189 | } |
1190 | |
1191 | static int cmd_start(struct opal_dev *dev, const u8 *uid, const u8 *method) |
1192 | { |
1193 | int err = 0; |
1194 | |
1195 | clear_opal_cmd(dev); |
1196 | set_comid(cmd: dev, comid: dev->comid); |
1197 | |
1198 | add_token_u8(err: &err, cmd: dev, tok: OPAL_CALL); |
1199 | add_token_bytestring(err: &err, cmd: dev, bytestring: uid, OPAL_UID_LENGTH); |
1200 | add_token_bytestring(err: &err, cmd: dev, bytestring: method, OPAL_METHOD_LENGTH); |
1201 | |
1202 | /* |
1203 | * Every method call is followed by its parameters enclosed within |
1204 | * OPAL_STARTLIST and OPAL_ENDLIST tokens. We automatically open the |
1205 | * parameter list here and close it later in cmd_finalize. |
1206 | */ |
1207 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
1208 | |
1209 | return err; |
1210 | } |
1211 | |
1212 | static int start_opal_session_cont(struct opal_dev *dev) |
1213 | { |
1214 | u32 hsn, tsn; |
1215 | int error; |
1216 | |
1217 | error = parse_and_check_status(dev); |
1218 | if (error) |
1219 | return error; |
1220 | |
1221 | hsn = response_get_u64(resp: &dev->parsed, n: 4); |
1222 | tsn = response_get_u64(resp: &dev->parsed, n: 5); |
1223 | |
1224 | if (hsn != GENERIC_HOST_SESSION_NUM || tsn < FIRST_TPER_SESSION_NUM) { |
1225 | pr_debug("Couldn't authenticate session\n" ); |
1226 | return -EPERM; |
1227 | } |
1228 | |
1229 | dev->hsn = hsn; |
1230 | dev->tsn = tsn; |
1231 | |
1232 | return 0; |
1233 | } |
1234 | |
1235 | static void add_suspend_info(struct opal_dev *dev, |
1236 | struct opal_suspend_data *sus) |
1237 | { |
1238 | struct opal_suspend_data *iter; |
1239 | |
1240 | list_for_each_entry(iter, &dev->unlk_lst, node) { |
1241 | if (iter->lr == sus->lr) { |
1242 | list_del(entry: &iter->node); |
1243 | kfree(objp: iter); |
1244 | break; |
1245 | } |
1246 | } |
1247 | list_add_tail(new: &sus->node, head: &dev->unlk_lst); |
1248 | } |
1249 | |
1250 | static int end_session_cont(struct opal_dev *dev) |
1251 | { |
1252 | dev->hsn = 0; |
1253 | dev->tsn = 0; |
1254 | |
1255 | return parse_and_check_status(dev); |
1256 | } |
1257 | |
1258 | static int finalize_and_send(struct opal_dev *dev, cont_fn cont) |
1259 | { |
1260 | int ret; |
1261 | |
1262 | ret = cmd_finalize(cmd: dev, hsn: dev->hsn, tsn: dev->tsn); |
1263 | if (ret) { |
1264 | pr_debug("Error finalizing command buffer: %d\n" , ret); |
1265 | return ret; |
1266 | } |
1267 | |
1268 | print_buffer(ptr: dev->cmd, length: dev->pos); |
1269 | |
1270 | return opal_send_recv(dev, cont); |
1271 | } |
1272 | |
1273 | static int generic_get_columns(struct opal_dev *dev, const u8 *table, |
1274 | u64 start_column, u64 end_column) |
1275 | { |
1276 | int err; |
1277 | |
1278 | err = cmd_start(dev, uid: table, method: opalmethod[OPAL_GET]); |
1279 | |
1280 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
1281 | |
1282 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1283 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTCOLUMN); |
1284 | add_token_u64(err: &err, cmd: dev, number: start_column); |
1285 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1286 | |
1287 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1288 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDCOLUMN); |
1289 | add_token_u64(err: &err, cmd: dev, number: end_column); |
1290 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1291 | |
1292 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
1293 | |
1294 | if (err) |
1295 | return err; |
1296 | |
1297 | return finalize_and_send(dev, cont: parse_and_check_status); |
1298 | } |
1299 | |
1300 | /* |
1301 | * request @column from table @table on device @dev. On success, the column |
1302 | * data will be available in dev->resp->tok[4] |
1303 | */ |
1304 | static int generic_get_column(struct opal_dev *dev, const u8 *table, |
1305 | u64 column) |
1306 | { |
1307 | return generic_get_columns(dev, table, start_column: column, end_column: column); |
1308 | } |
1309 | |
1310 | /* |
1311 | * see TCG SAS 5.3.2.3 for a description of the available columns |
1312 | * |
1313 | * the result is provided in dev->resp->tok[4] |
1314 | */ |
1315 | static int generic_get_table_info(struct opal_dev *dev, const u8 *table_uid, |
1316 | u64 column) |
1317 | { |
1318 | u8 uid[OPAL_UID_LENGTH]; |
1319 | const unsigned int half = OPAL_UID_LENGTH_HALF; |
1320 | |
1321 | /* sed-opal UIDs can be split in two halves: |
1322 | * first: actual table index |
1323 | * second: relative index in the table |
1324 | * so we have to get the first half of the OPAL_TABLE_TABLE and use the |
1325 | * first part of the target table as relative index into that table |
1326 | */ |
1327 | memcpy(uid, opaluid[OPAL_TABLE_TABLE], half); |
1328 | memcpy(uid + half, table_uid, half); |
1329 | |
1330 | return generic_get_column(dev, table: uid, column); |
1331 | } |
1332 | |
1333 | static int gen_key(struct opal_dev *dev, void *data) |
1334 | { |
1335 | u8 uid[OPAL_UID_LENGTH]; |
1336 | int err; |
1337 | |
1338 | memcpy(uid, dev->prev_data, min(sizeof(uid), dev->prev_d_len)); |
1339 | kfree(objp: dev->prev_data); |
1340 | dev->prev_data = NULL; |
1341 | |
1342 | err = cmd_start(dev, uid, method: opalmethod[OPAL_GENKEY]); |
1343 | |
1344 | if (err) { |
1345 | pr_debug("Error building gen key command\n" ); |
1346 | return err; |
1347 | |
1348 | } |
1349 | |
1350 | return finalize_and_send(dev, cont: parse_and_check_status); |
1351 | } |
1352 | |
1353 | static int get_active_key_cont(struct opal_dev *dev) |
1354 | { |
1355 | const char *activekey; |
1356 | size_t keylen; |
1357 | int error; |
1358 | |
1359 | error = parse_and_check_status(dev); |
1360 | if (error) |
1361 | return error; |
1362 | |
1363 | keylen = response_get_string(resp: &dev->parsed, n: 4, store: &activekey); |
1364 | if (!activekey) { |
1365 | pr_debug("%s: Couldn't extract the Activekey from the response\n" , |
1366 | __func__); |
1367 | return OPAL_INVAL_PARAM; |
1368 | } |
1369 | |
1370 | dev->prev_data = kmemdup(p: activekey, size: keylen, GFP_KERNEL); |
1371 | |
1372 | if (!dev->prev_data) |
1373 | return -ENOMEM; |
1374 | |
1375 | dev->prev_d_len = keylen; |
1376 | |
1377 | return 0; |
1378 | } |
1379 | |
1380 | static int get_active_key(struct opal_dev *dev, void *data) |
1381 | { |
1382 | u8 uid[OPAL_UID_LENGTH]; |
1383 | int err; |
1384 | u8 *lr = data; |
1385 | |
1386 | err = build_locking_range(buffer: uid, length: sizeof(uid), lr: *lr); |
1387 | if (err) |
1388 | return err; |
1389 | |
1390 | err = generic_get_column(dev, table: uid, column: OPAL_ACTIVEKEY); |
1391 | if (err) |
1392 | return err; |
1393 | |
1394 | return get_active_key_cont(dev); |
1395 | } |
1396 | |
1397 | static int generic_table_write_data(struct opal_dev *dev, const u64 data, |
1398 | u64 offset, u64 size, const u8 *uid) |
1399 | { |
1400 | const u8 __user *src = (u8 __user *)(uintptr_t)data; |
1401 | u8 *dst; |
1402 | u64 len; |
1403 | size_t off = 0; |
1404 | int err; |
1405 | |
1406 | /* do we fit in the available space? */ |
1407 | err = generic_get_table_info(dev, table_uid: uid, column: OPAL_TABLE_ROWS); |
1408 | if (err) { |
1409 | pr_debug("Couldn't get the table size\n" ); |
1410 | return err; |
1411 | } |
1412 | |
1413 | len = response_get_u64(resp: &dev->parsed, n: 4); |
1414 | if (size > len || offset > len - size) { |
1415 | pr_debug("Does not fit in the table (%llu vs. %llu)\n" , |
1416 | offset + size, len); |
1417 | return -ENOSPC; |
1418 | } |
1419 | |
1420 | /* do the actual transmission(s) */ |
1421 | while (off < size) { |
1422 | err = cmd_start(dev, uid, method: opalmethod[OPAL_SET]); |
1423 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1424 | add_token_u8(err: &err, cmd: dev, tok: OPAL_WHERE); |
1425 | add_token_u64(err: &err, cmd: dev, number: offset + off); |
1426 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1427 | |
1428 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1429 | add_token_u8(err: &err, cmd: dev, tok: OPAL_VALUES); |
1430 | |
1431 | /* |
1432 | * The bytestring header is either 1 or 2 bytes, so assume 2. |
1433 | * There also needs to be enough space to accommodate the |
1434 | * trailing OPAL_ENDNAME (1 byte) and tokens added by |
1435 | * cmd_finalize. |
1436 | */ |
1437 | len = min(remaining_size(dev) - (2+1+CMD_FINALIZE_BYTES_NEEDED), |
1438 | (size_t)(size - off)); |
1439 | pr_debug("Write bytes %zu+%llu/%llu\n" , off, len, size); |
1440 | |
1441 | dst = add_bytestring_header(err: &err, cmd: dev, len); |
1442 | if (!dst) |
1443 | break; |
1444 | |
1445 | if (copy_from_user(to: dst, from: src + off, n: len)) { |
1446 | err = -EFAULT; |
1447 | break; |
1448 | } |
1449 | |
1450 | dev->pos += len; |
1451 | |
1452 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1453 | if (err) |
1454 | break; |
1455 | |
1456 | err = finalize_and_send(dev, cont: parse_and_check_status); |
1457 | if (err) |
1458 | break; |
1459 | |
1460 | off += len; |
1461 | } |
1462 | |
1463 | return err; |
1464 | } |
1465 | |
1466 | static int generic_lr_enable_disable(struct opal_dev *dev, |
1467 | u8 *uid, bool rle, bool wle, |
1468 | bool rl, bool wl) |
1469 | { |
1470 | int err; |
1471 | |
1472 | err = cmd_start(dev, uid, method: opalmethod[OPAL_SET]); |
1473 | |
1474 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1475 | add_token_u8(err: &err, cmd: dev, tok: OPAL_VALUES); |
1476 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
1477 | |
1478 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1479 | add_token_u8(err: &err, cmd: dev, tok: OPAL_READLOCKENABLED); |
1480 | add_token_u8(err: &err, cmd: dev, tok: rle); |
1481 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1482 | |
1483 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1484 | add_token_u8(err: &err, cmd: dev, tok: OPAL_WRITELOCKENABLED); |
1485 | add_token_u8(err: &err, cmd: dev, tok: wle); |
1486 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1487 | |
1488 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1489 | add_token_u8(err: &err, cmd: dev, tok: OPAL_READLOCKED); |
1490 | add_token_u8(err: &err, cmd: dev, tok: rl); |
1491 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1492 | |
1493 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1494 | add_token_u8(err: &err, cmd: dev, tok: OPAL_WRITELOCKED); |
1495 | add_token_u8(err: &err, cmd: dev, tok: wl); |
1496 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1497 | |
1498 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
1499 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1500 | |
1501 | return err; |
1502 | } |
1503 | |
1504 | static inline int enable_global_lr(struct opal_dev *dev, u8 *uid, |
1505 | struct opal_user_lr_setup *setup) |
1506 | { |
1507 | int err; |
1508 | |
1509 | err = generic_lr_enable_disable(dev, uid, rle: !!setup->RLE, wle: !!setup->WLE, |
1510 | rl: 0, wl: 0); |
1511 | if (err) |
1512 | pr_debug("Failed to create enable global lr command\n" ); |
1513 | |
1514 | return err; |
1515 | } |
1516 | |
1517 | static int setup_locking_range(struct opal_dev *dev, void *data) |
1518 | { |
1519 | u8 uid[OPAL_UID_LENGTH]; |
1520 | struct opal_user_lr_setup *setup = data; |
1521 | u8 lr; |
1522 | int err; |
1523 | |
1524 | lr = setup->session.opal_key.lr; |
1525 | err = build_locking_range(buffer: uid, length: sizeof(uid), lr); |
1526 | if (err) |
1527 | return err; |
1528 | |
1529 | if (lr == 0) |
1530 | err = enable_global_lr(dev, uid, setup); |
1531 | else { |
1532 | err = cmd_start(dev, uid, method: opalmethod[OPAL_SET]); |
1533 | |
1534 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1535 | add_token_u8(err: &err, cmd: dev, tok: OPAL_VALUES); |
1536 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
1537 | |
1538 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1539 | add_token_u8(err: &err, cmd: dev, tok: OPAL_RANGESTART); |
1540 | add_token_u64(err: &err, cmd: dev, number: setup->range_start); |
1541 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1542 | |
1543 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1544 | add_token_u8(err: &err, cmd: dev, tok: OPAL_RANGELENGTH); |
1545 | add_token_u64(err: &err, cmd: dev, number: setup->range_length); |
1546 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1547 | |
1548 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1549 | add_token_u8(err: &err, cmd: dev, tok: OPAL_READLOCKENABLED); |
1550 | add_token_u64(err: &err, cmd: dev, number: !!setup->RLE); |
1551 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1552 | |
1553 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1554 | add_token_u8(err: &err, cmd: dev, tok: OPAL_WRITELOCKENABLED); |
1555 | add_token_u64(err: &err, cmd: dev, number: !!setup->WLE); |
1556 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1557 | |
1558 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
1559 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1560 | } |
1561 | if (err) { |
1562 | pr_debug("Error building Setup Locking range command.\n" ); |
1563 | return err; |
1564 | } |
1565 | |
1566 | return finalize_and_send(dev, cont: parse_and_check_status); |
1567 | } |
1568 | |
1569 | static int response_get_column(const struct parsed_resp *resp, |
1570 | int *iter, |
1571 | u8 column, |
1572 | u64 *value) |
1573 | { |
1574 | const struct opal_resp_tok *tok; |
1575 | int n = *iter; |
1576 | u64 val; |
1577 | |
1578 | tok = response_get_token(resp, n); |
1579 | if (IS_ERR(ptr: tok)) |
1580 | return PTR_ERR(ptr: tok); |
1581 | |
1582 | if (!response_token_matches(token: tok, match: OPAL_STARTNAME)) { |
1583 | pr_debug("Unexpected response token type %d.\n" , n); |
1584 | return OPAL_INVAL_PARAM; |
1585 | } |
1586 | n++; |
1587 | |
1588 | if (response_get_u64(resp, n) != column) { |
1589 | pr_debug("Token %d does not match expected column %u.\n" , |
1590 | n, column); |
1591 | return OPAL_INVAL_PARAM; |
1592 | } |
1593 | n++; |
1594 | |
1595 | val = response_get_u64(resp, n); |
1596 | n++; |
1597 | |
1598 | tok = response_get_token(resp, n); |
1599 | if (IS_ERR(ptr: tok)) |
1600 | return PTR_ERR(ptr: tok); |
1601 | |
1602 | if (!response_token_matches(token: tok, match: OPAL_ENDNAME)) { |
1603 | pr_debug("Unexpected response token type %d.\n" , n); |
1604 | return OPAL_INVAL_PARAM; |
1605 | } |
1606 | n++; |
1607 | |
1608 | *value = val; |
1609 | *iter = n; |
1610 | |
1611 | return 0; |
1612 | } |
1613 | |
1614 | static int locking_range_status(struct opal_dev *dev, void *data) |
1615 | { |
1616 | u8 lr_buffer[OPAL_UID_LENGTH]; |
1617 | u64 resp; |
1618 | bool rlocked, wlocked; |
1619 | int err, tok_n = 2; |
1620 | struct opal_lr_status *lrst = data; |
1621 | |
1622 | err = build_locking_range(buffer: lr_buffer, length: sizeof(lr_buffer), |
1623 | lr: lrst->session.opal_key.lr); |
1624 | if (err) |
1625 | return err; |
1626 | |
1627 | err = generic_get_columns(dev, table: lr_buffer, start_column: OPAL_RANGESTART, |
1628 | end_column: OPAL_WRITELOCKED); |
1629 | if (err) { |
1630 | pr_debug("Couldn't get lr %u table columns %d to %d.\n" , |
1631 | lrst->session.opal_key.lr, OPAL_RANGESTART, |
1632 | OPAL_WRITELOCKED); |
1633 | return err; |
1634 | } |
1635 | |
1636 | /* range start */ |
1637 | err = response_get_column(resp: &dev->parsed, iter: &tok_n, column: OPAL_RANGESTART, |
1638 | value: &lrst->range_start); |
1639 | if (err) |
1640 | return err; |
1641 | |
1642 | /* range length */ |
1643 | err = response_get_column(resp: &dev->parsed, iter: &tok_n, column: OPAL_RANGELENGTH, |
1644 | value: &lrst->range_length); |
1645 | if (err) |
1646 | return err; |
1647 | |
1648 | /* RLE */ |
1649 | err = response_get_column(resp: &dev->parsed, iter: &tok_n, column: OPAL_READLOCKENABLED, |
1650 | value: &resp); |
1651 | if (err) |
1652 | return err; |
1653 | |
1654 | lrst->RLE = !!resp; |
1655 | |
1656 | /* WLE */ |
1657 | err = response_get_column(resp: &dev->parsed, iter: &tok_n, column: OPAL_WRITELOCKENABLED, |
1658 | value: &resp); |
1659 | if (err) |
1660 | return err; |
1661 | |
1662 | lrst->WLE = !!resp; |
1663 | |
1664 | /* read locked */ |
1665 | err = response_get_column(resp: &dev->parsed, iter: &tok_n, column: OPAL_READLOCKED, value: &resp); |
1666 | if (err) |
1667 | return err; |
1668 | |
1669 | rlocked = !!resp; |
1670 | |
1671 | /* write locked */ |
1672 | err = response_get_column(resp: &dev->parsed, iter: &tok_n, column: OPAL_WRITELOCKED, value: &resp); |
1673 | if (err) |
1674 | return err; |
1675 | |
1676 | wlocked = !!resp; |
1677 | |
1678 | /* opal_lock_state can not map 'read locked' only state. */ |
1679 | lrst->l_state = OPAL_RW; |
1680 | if (rlocked && wlocked) |
1681 | lrst->l_state = OPAL_LK; |
1682 | else if (wlocked) |
1683 | lrst->l_state = OPAL_RO; |
1684 | else if (rlocked) { |
1685 | pr_debug("Can not report read locked only state.\n" ); |
1686 | return -EINVAL; |
1687 | } |
1688 | |
1689 | return 0; |
1690 | } |
1691 | |
1692 | static int start_generic_opal_session(struct opal_dev *dev, |
1693 | enum opal_uid auth, |
1694 | enum opal_uid sp_type, |
1695 | const char *key, |
1696 | u8 key_len) |
1697 | { |
1698 | u32 hsn; |
1699 | int err; |
1700 | |
1701 | if (key == NULL && auth != OPAL_ANYBODY_UID) |
1702 | return OPAL_INVAL_PARAM; |
1703 | |
1704 | hsn = GENERIC_HOST_SESSION_NUM; |
1705 | err = cmd_start(dev, uid: opaluid[OPAL_SMUID_UID], |
1706 | method: opalmethod[OPAL_STARTSESSION]); |
1707 | |
1708 | add_token_u64(err: &err, cmd: dev, number: hsn); |
1709 | add_token_bytestring(err: &err, cmd: dev, bytestring: opaluid[sp_type], OPAL_UID_LENGTH); |
1710 | add_token_u8(err: &err, cmd: dev, tok: 1); |
1711 | |
1712 | switch (auth) { |
1713 | case OPAL_ANYBODY_UID: |
1714 | break; |
1715 | case OPAL_ADMIN1_UID: |
1716 | case OPAL_SID_UID: |
1717 | case OPAL_PSID_UID: |
1718 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1719 | add_token_u8(err: &err, cmd: dev, tok: 0); /* HostChallenge */ |
1720 | add_token_bytestring(err: &err, cmd: dev, bytestring: key, len: key_len); |
1721 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1722 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1723 | add_token_u8(err: &err, cmd: dev, tok: 3); /* HostSignAuth */ |
1724 | add_token_bytestring(err: &err, cmd: dev, bytestring: opaluid[auth], |
1725 | OPAL_UID_LENGTH); |
1726 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1727 | break; |
1728 | default: |
1729 | pr_debug("Cannot start Admin SP session with auth %d\n" , auth); |
1730 | return OPAL_INVAL_PARAM; |
1731 | } |
1732 | |
1733 | if (err) { |
1734 | pr_debug("Error building start adminsp session command.\n" ); |
1735 | return err; |
1736 | } |
1737 | |
1738 | return finalize_and_send(dev, cont: start_opal_session_cont); |
1739 | } |
1740 | |
1741 | static int start_anybodyASP_opal_session(struct opal_dev *dev, void *data) |
1742 | { |
1743 | return start_generic_opal_session(dev, auth: OPAL_ANYBODY_UID, |
1744 | sp_type: OPAL_ADMINSP_UID, NULL, key_len: 0); |
1745 | } |
1746 | |
1747 | static int start_SIDASP_opal_session(struct opal_dev *dev, void *data) |
1748 | { |
1749 | int ret; |
1750 | const u8 *key = dev->prev_data; |
1751 | |
1752 | if (!key) { |
1753 | const struct opal_key *okey = data; |
1754 | |
1755 | ret = start_generic_opal_session(dev, auth: OPAL_SID_UID, |
1756 | sp_type: OPAL_ADMINSP_UID, |
1757 | key: okey->key, |
1758 | key_len: okey->key_len); |
1759 | } else { |
1760 | ret = start_generic_opal_session(dev, auth: OPAL_SID_UID, |
1761 | sp_type: OPAL_ADMINSP_UID, |
1762 | key, key_len: dev->prev_d_len); |
1763 | kfree(objp: key); |
1764 | dev->prev_data = NULL; |
1765 | } |
1766 | |
1767 | return ret; |
1768 | } |
1769 | |
1770 | static int start_admin1LSP_opal_session(struct opal_dev *dev, void *data) |
1771 | { |
1772 | struct opal_key *key = data; |
1773 | |
1774 | return start_generic_opal_session(dev, auth: OPAL_ADMIN1_UID, |
1775 | sp_type: OPAL_LOCKINGSP_UID, |
1776 | key: key->key, key_len: key->key_len); |
1777 | } |
1778 | |
1779 | static int start_PSID_opal_session(struct opal_dev *dev, void *data) |
1780 | { |
1781 | const struct opal_key *okey = data; |
1782 | |
1783 | return start_generic_opal_session(dev, auth: OPAL_PSID_UID, |
1784 | sp_type: OPAL_ADMINSP_UID, |
1785 | key: okey->key, |
1786 | key_len: okey->key_len); |
1787 | } |
1788 | |
1789 | static int start_auth_opal_session(struct opal_dev *dev, void *data) |
1790 | { |
1791 | struct opal_session_info *session = data; |
1792 | u8 lk_ul_user[OPAL_UID_LENGTH]; |
1793 | size_t keylen = session->opal_key.key_len; |
1794 | int err = 0; |
1795 | |
1796 | u8 *key = session->opal_key.key; |
1797 | u32 hsn = GENERIC_HOST_SESSION_NUM; |
1798 | |
1799 | if (session->sum) |
1800 | err = build_locking_user(buffer: lk_ul_user, length: sizeof(lk_ul_user), |
1801 | lr: session->opal_key.lr); |
1802 | else if (session->who != OPAL_ADMIN1 && !session->sum) |
1803 | err = build_locking_user(buffer: lk_ul_user, length: sizeof(lk_ul_user), |
1804 | lr: session->who - 1); |
1805 | else |
1806 | memcpy(lk_ul_user, opaluid[OPAL_ADMIN1_UID], OPAL_UID_LENGTH); |
1807 | |
1808 | if (err) |
1809 | return err; |
1810 | |
1811 | err = cmd_start(dev, uid: opaluid[OPAL_SMUID_UID], |
1812 | method: opalmethod[OPAL_STARTSESSION]); |
1813 | |
1814 | add_token_u64(err: &err, cmd: dev, number: hsn); |
1815 | add_token_bytestring(err: &err, cmd: dev, bytestring: opaluid[OPAL_LOCKINGSP_UID], |
1816 | OPAL_UID_LENGTH); |
1817 | add_token_u8(err: &err, cmd: dev, tok: 1); |
1818 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1819 | add_token_u8(err: &err, cmd: dev, tok: 0); |
1820 | add_token_bytestring(err: &err, cmd: dev, bytestring: key, len: keylen); |
1821 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1822 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1823 | add_token_u8(err: &err, cmd: dev, tok: 3); |
1824 | add_token_bytestring(err: &err, cmd: dev, bytestring: lk_ul_user, OPAL_UID_LENGTH); |
1825 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1826 | |
1827 | if (err) { |
1828 | pr_debug("Error building STARTSESSION command.\n" ); |
1829 | return err; |
1830 | } |
1831 | |
1832 | return finalize_and_send(dev, cont: start_opal_session_cont); |
1833 | } |
1834 | |
1835 | static int revert_tper(struct opal_dev *dev, void *data) |
1836 | { |
1837 | int err; |
1838 | |
1839 | err = cmd_start(dev, uid: opaluid[OPAL_ADMINSP_UID], |
1840 | method: opalmethod[OPAL_REVERT]); |
1841 | if (err) { |
1842 | pr_debug("Error building REVERT TPER command.\n" ); |
1843 | return err; |
1844 | } |
1845 | |
1846 | return finalize_and_send(dev, cont: parse_and_check_status); |
1847 | } |
1848 | |
1849 | static int internal_activate_user(struct opal_dev *dev, void *data) |
1850 | { |
1851 | struct opal_session_info *session = data; |
1852 | u8 uid[OPAL_UID_LENGTH]; |
1853 | int err; |
1854 | |
1855 | memcpy(uid, opaluid[OPAL_USER1_UID], OPAL_UID_LENGTH); |
1856 | uid[7] = session->who; |
1857 | |
1858 | err = cmd_start(dev, uid, method: opalmethod[OPAL_SET]); |
1859 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1860 | add_token_u8(err: &err, cmd: dev, tok: OPAL_VALUES); |
1861 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
1862 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1863 | add_token_u8(err: &err, cmd: dev, tok: 5); /* Enabled */ |
1864 | add_token_u8(err: &err, cmd: dev, tok: OPAL_TRUE); |
1865 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1866 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
1867 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1868 | |
1869 | if (err) { |
1870 | pr_debug("Error building Activate UserN command.\n" ); |
1871 | return err; |
1872 | } |
1873 | |
1874 | return finalize_and_send(dev, cont: parse_and_check_status); |
1875 | } |
1876 | |
1877 | static int revert_lsp(struct opal_dev *dev, void *data) |
1878 | { |
1879 | struct opal_revert_lsp *rev = data; |
1880 | int err; |
1881 | |
1882 | err = cmd_start(dev, uid: opaluid[OPAL_THISSP_UID], |
1883 | method: opalmethod[OPAL_REVERTSP]); |
1884 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1885 | add_token_u64(err: &err, cmd: dev, number: OPAL_KEEP_GLOBAL_RANGE_KEY); |
1886 | add_token_u8(err: &err, cmd: dev, tok: (rev->options & OPAL_PRESERVE) ? |
1887 | OPAL_TRUE : OPAL_FALSE); |
1888 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1889 | if (err) { |
1890 | pr_debug("Error building REVERT SP command.\n" ); |
1891 | return err; |
1892 | } |
1893 | |
1894 | return finalize_and_send(dev, cont: parse_and_check_status); |
1895 | } |
1896 | |
1897 | static int erase_locking_range(struct opal_dev *dev, void *data) |
1898 | { |
1899 | struct opal_session_info *session = data; |
1900 | u8 uid[OPAL_UID_LENGTH]; |
1901 | int err; |
1902 | |
1903 | if (build_locking_range(buffer: uid, length: sizeof(uid), lr: session->opal_key.lr) < 0) |
1904 | return -ERANGE; |
1905 | |
1906 | err = cmd_start(dev, uid, method: opalmethod[OPAL_ERASE]); |
1907 | |
1908 | if (err) { |
1909 | pr_debug("Error building Erase Locking Range Command.\n" ); |
1910 | return err; |
1911 | } |
1912 | |
1913 | return finalize_and_send(dev, cont: parse_and_check_status); |
1914 | } |
1915 | |
1916 | static int set_mbr_done(struct opal_dev *dev, void *data) |
1917 | { |
1918 | u8 *mbr_done_tf = data; |
1919 | int err; |
1920 | |
1921 | err = cmd_start(dev, uid: opaluid[OPAL_MBRCONTROL], |
1922 | method: opalmethod[OPAL_SET]); |
1923 | |
1924 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1925 | add_token_u8(err: &err, cmd: dev, tok: OPAL_VALUES); |
1926 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
1927 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1928 | add_token_u8(err: &err, cmd: dev, tok: OPAL_MBRDONE); |
1929 | add_token_u8(err: &err, cmd: dev, tok: *mbr_done_tf); /* Done T or F */ |
1930 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1931 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
1932 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1933 | |
1934 | if (err) { |
1935 | pr_debug("Error Building set MBR Done command\n" ); |
1936 | return err; |
1937 | } |
1938 | |
1939 | return finalize_and_send(dev, cont: parse_and_check_status); |
1940 | } |
1941 | |
1942 | static int set_mbr_enable_disable(struct opal_dev *dev, void *data) |
1943 | { |
1944 | u8 *mbr_en_dis = data; |
1945 | int err; |
1946 | |
1947 | err = cmd_start(dev, uid: opaluid[OPAL_MBRCONTROL], |
1948 | method: opalmethod[OPAL_SET]); |
1949 | |
1950 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1951 | add_token_u8(err: &err, cmd: dev, tok: OPAL_VALUES); |
1952 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
1953 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1954 | add_token_u8(err: &err, cmd: dev, tok: OPAL_MBRENABLE); |
1955 | add_token_u8(err: &err, cmd: dev, tok: *mbr_en_dis); |
1956 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1957 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
1958 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1959 | |
1960 | if (err) { |
1961 | pr_debug("Error Building set MBR done command\n" ); |
1962 | return err; |
1963 | } |
1964 | |
1965 | return finalize_and_send(dev, cont: parse_and_check_status); |
1966 | } |
1967 | |
1968 | static int write_shadow_mbr(struct opal_dev *dev, void *data) |
1969 | { |
1970 | struct opal_shadow_mbr *shadow = data; |
1971 | |
1972 | return generic_table_write_data(dev, data: shadow->data, offset: shadow->offset, |
1973 | size: shadow->size, uid: opaluid[OPAL_MBR]); |
1974 | } |
1975 | |
1976 | static int generic_pw_cmd(u8 *key, size_t key_len, u8 *cpin_uid, |
1977 | struct opal_dev *dev) |
1978 | { |
1979 | int err; |
1980 | |
1981 | err = cmd_start(dev, uid: cpin_uid, method: opalmethod[OPAL_SET]); |
1982 | |
1983 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1984 | add_token_u8(err: &err, cmd: dev, tok: OPAL_VALUES); |
1985 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
1986 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
1987 | add_token_u8(err: &err, cmd: dev, tok: OPAL_PIN); |
1988 | add_token_bytestring(err: &err, cmd: dev, bytestring: key, len: key_len); |
1989 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1990 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
1991 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
1992 | |
1993 | return err; |
1994 | } |
1995 | |
1996 | static int set_new_pw(struct opal_dev *dev, void *data) |
1997 | { |
1998 | u8 cpin_uid[OPAL_UID_LENGTH]; |
1999 | struct opal_session_info *usr = data; |
2000 | |
2001 | memcpy(cpin_uid, opaluid[OPAL_C_PIN_ADMIN1], OPAL_UID_LENGTH); |
2002 | |
2003 | if (usr->who != OPAL_ADMIN1) { |
2004 | cpin_uid[5] = 0x03; |
2005 | if (usr->sum) |
2006 | cpin_uid[7] = usr->opal_key.lr + 1; |
2007 | else |
2008 | cpin_uid[7] = usr->who; |
2009 | } |
2010 | |
2011 | if (generic_pw_cmd(key: usr->opal_key.key, key_len: usr->opal_key.key_len, |
2012 | cpin_uid, dev)) { |
2013 | pr_debug("Error building set password command.\n" ); |
2014 | return -ERANGE; |
2015 | } |
2016 | |
2017 | return finalize_and_send(dev, cont: parse_and_check_status); |
2018 | } |
2019 | |
2020 | static int set_sid_cpin_pin(struct opal_dev *dev, void *data) |
2021 | { |
2022 | u8 cpin_uid[OPAL_UID_LENGTH]; |
2023 | struct opal_key *key = data; |
2024 | |
2025 | memcpy(cpin_uid, opaluid[OPAL_C_PIN_SID], OPAL_UID_LENGTH); |
2026 | |
2027 | if (generic_pw_cmd(key: key->key, key_len: key->key_len, cpin_uid, dev)) { |
2028 | pr_debug("Error building Set SID cpin\n" ); |
2029 | return -ERANGE; |
2030 | } |
2031 | return finalize_and_send(dev, cont: parse_and_check_status); |
2032 | } |
2033 | |
2034 | static void add_authority_object_ref(int *err, |
2035 | struct opal_dev *dev, |
2036 | const u8 *uid, |
2037 | size_t uid_len) |
2038 | { |
2039 | add_token_u8(err, cmd: dev, tok: OPAL_STARTNAME); |
2040 | add_token_bytestring(err, cmd: dev, |
2041 | bytestring: opaluid[OPAL_HALF_UID_AUTHORITY_OBJ_REF], |
2042 | OPAL_UID_LENGTH/2); |
2043 | add_token_bytestring(err, cmd: dev, bytestring: uid, len: uid_len); |
2044 | add_token_u8(err, cmd: dev, tok: OPAL_ENDNAME); |
2045 | } |
2046 | |
2047 | static void add_boolean_object_ref(int *err, |
2048 | struct opal_dev *dev, |
2049 | u8 boolean_op) |
2050 | { |
2051 | add_token_u8(err, cmd: dev, tok: OPAL_STARTNAME); |
2052 | add_token_bytestring(err, cmd: dev, bytestring: opaluid[OPAL_HALF_UID_BOOLEAN_ACE], |
2053 | OPAL_UID_LENGTH/2); |
2054 | add_token_u8(err, cmd: dev, tok: boolean_op); |
2055 | add_token_u8(err, cmd: dev, tok: OPAL_ENDNAME); |
2056 | } |
2057 | |
2058 | static int set_lr_boolean_ace(struct opal_dev *dev, |
2059 | unsigned int opal_uid, |
2060 | u8 lr, |
2061 | const u8 *users, |
2062 | size_t users_len) |
2063 | { |
2064 | u8 lr_buffer[OPAL_UID_LENGTH]; |
2065 | u8 user_uid[OPAL_UID_LENGTH]; |
2066 | u8 u; |
2067 | int err; |
2068 | |
2069 | memcpy(lr_buffer, opaluid[opal_uid], OPAL_UID_LENGTH); |
2070 | lr_buffer[7] = lr; |
2071 | |
2072 | err = cmd_start(dev, uid: lr_buffer, method: opalmethod[OPAL_SET]); |
2073 | |
2074 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
2075 | add_token_u8(err: &err, cmd: dev, tok: OPAL_VALUES); |
2076 | |
2077 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
2078 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
2079 | add_token_u8(err: &err, cmd: dev, tok: 3); |
2080 | |
2081 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
2082 | |
2083 | for (u = 0; u < users_len; u++) { |
2084 | if (users[u] == OPAL_ADMIN1) |
2085 | memcpy(user_uid, opaluid[OPAL_ADMIN1_UID], |
2086 | OPAL_UID_LENGTH); |
2087 | else { |
2088 | memcpy(user_uid, opaluid[OPAL_USER1_UID], |
2089 | OPAL_UID_LENGTH); |
2090 | user_uid[7] = users[u]; |
2091 | } |
2092 | |
2093 | add_authority_object_ref(err: &err, dev, uid: user_uid, uid_len: sizeof(user_uid)); |
2094 | |
2095 | /* |
2096 | * Add boolean operator in postfix only with |
2097 | * two or more authorities being added in ACE |
2098 | * expresion. |
2099 | * */ |
2100 | if (u > 0) |
2101 | add_boolean_object_ref(err: &err, dev, OPAL_BOOLEAN_OR); |
2102 | } |
2103 | |
2104 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
2105 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
2106 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
2107 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
2108 | |
2109 | return err; |
2110 | } |
2111 | |
2112 | static int add_user_to_lr(struct opal_dev *dev, void *data) |
2113 | { |
2114 | int err; |
2115 | struct opal_lock_unlock *lkul = data; |
2116 | const u8 users[] = { |
2117 | lkul->session.who |
2118 | }; |
2119 | |
2120 | err = set_lr_boolean_ace(dev, |
2121 | opal_uid: lkul->l_state == OPAL_RW ? |
2122 | OPAL_LOCKINGRANGE_ACE_WRLOCKED : |
2123 | OPAL_LOCKINGRANGE_ACE_RDLOCKED, |
2124 | lr: lkul->session.opal_key.lr, users, |
2125 | ARRAY_SIZE(users)); |
2126 | if (err) { |
2127 | pr_debug("Error building add user to locking range command.\n" ); |
2128 | return err; |
2129 | } |
2130 | |
2131 | return finalize_and_send(dev, cont: parse_and_check_status); |
2132 | } |
2133 | |
2134 | static int add_user_to_lr_ace(struct opal_dev *dev, void *data) |
2135 | { |
2136 | int err; |
2137 | struct opal_lock_unlock *lkul = data; |
2138 | const u8 users[] = { |
2139 | OPAL_ADMIN1, |
2140 | lkul->session.who |
2141 | }; |
2142 | |
2143 | err = set_lr_boolean_ace(dev, opal_uid: OPAL_LOCKINGRANGE_ACE_START_TO_KEY, |
2144 | lr: lkul->session.opal_key.lr, users, |
2145 | ARRAY_SIZE(users)); |
2146 | |
2147 | if (err) { |
2148 | pr_debug("Error building add user to locking ranges ACEs.\n" ); |
2149 | return err; |
2150 | } |
2151 | |
2152 | return finalize_and_send(dev, cont: parse_and_check_status); |
2153 | } |
2154 | |
2155 | static int lock_unlock_locking_range(struct opal_dev *dev, void *data) |
2156 | { |
2157 | u8 lr_buffer[OPAL_UID_LENGTH]; |
2158 | struct opal_lock_unlock *lkul = data; |
2159 | u8 read_locked = 1, write_locked = 1; |
2160 | int err; |
2161 | |
2162 | if (build_locking_range(buffer: lr_buffer, length: sizeof(lr_buffer), |
2163 | lr: lkul->session.opal_key.lr) < 0) |
2164 | return -ERANGE; |
2165 | |
2166 | switch (lkul->l_state) { |
2167 | case OPAL_RO: |
2168 | read_locked = 0; |
2169 | write_locked = 1; |
2170 | break; |
2171 | case OPAL_RW: |
2172 | read_locked = 0; |
2173 | write_locked = 0; |
2174 | break; |
2175 | case OPAL_LK: |
2176 | /* vars are initialized to locked */ |
2177 | break; |
2178 | default: |
2179 | pr_debug("Tried to set an invalid locking state... returning to uland\n" ); |
2180 | return OPAL_INVAL_PARAM; |
2181 | } |
2182 | |
2183 | err = cmd_start(dev, uid: lr_buffer, method: opalmethod[OPAL_SET]); |
2184 | |
2185 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
2186 | add_token_u8(err: &err, cmd: dev, tok: OPAL_VALUES); |
2187 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
2188 | |
2189 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
2190 | add_token_u8(err: &err, cmd: dev, tok: OPAL_READLOCKED); |
2191 | add_token_u8(err: &err, cmd: dev, tok: read_locked); |
2192 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
2193 | |
2194 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
2195 | add_token_u8(err: &err, cmd: dev, tok: OPAL_WRITELOCKED); |
2196 | add_token_u8(err: &err, cmd: dev, tok: write_locked); |
2197 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
2198 | |
2199 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
2200 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
2201 | |
2202 | if (err) { |
2203 | pr_debug("Error building SET command.\n" ); |
2204 | return err; |
2205 | } |
2206 | |
2207 | return finalize_and_send(dev, cont: parse_and_check_status); |
2208 | } |
2209 | |
2210 | |
2211 | static int lock_unlock_locking_range_sum(struct opal_dev *dev, void *data) |
2212 | { |
2213 | u8 lr_buffer[OPAL_UID_LENGTH]; |
2214 | u8 read_locked = 1, write_locked = 1; |
2215 | struct opal_lock_unlock *lkul = data; |
2216 | int ret; |
2217 | |
2218 | clear_opal_cmd(dev); |
2219 | set_comid(cmd: dev, comid: dev->comid); |
2220 | |
2221 | if (build_locking_range(buffer: lr_buffer, length: sizeof(lr_buffer), |
2222 | lr: lkul->session.opal_key.lr) < 0) |
2223 | return -ERANGE; |
2224 | |
2225 | switch (lkul->l_state) { |
2226 | case OPAL_RO: |
2227 | read_locked = 0; |
2228 | write_locked = 1; |
2229 | break; |
2230 | case OPAL_RW: |
2231 | read_locked = 0; |
2232 | write_locked = 0; |
2233 | break; |
2234 | case OPAL_LK: |
2235 | /* vars are initialized to locked */ |
2236 | break; |
2237 | default: |
2238 | pr_debug("Tried to set an invalid locking state.\n" ); |
2239 | return OPAL_INVAL_PARAM; |
2240 | } |
2241 | ret = generic_lr_enable_disable(dev, uid: lr_buffer, rle: 1, wle: 1, |
2242 | rl: read_locked, wl: write_locked); |
2243 | |
2244 | if (ret < 0) { |
2245 | pr_debug("Error building SET command.\n" ); |
2246 | return ret; |
2247 | } |
2248 | |
2249 | return finalize_and_send(dev, cont: parse_and_check_status); |
2250 | } |
2251 | |
2252 | static int activate_lsp(struct opal_dev *dev, void *data) |
2253 | { |
2254 | struct opal_lr_act *opal_act = data; |
2255 | u8 user_lr[OPAL_UID_LENGTH]; |
2256 | int err, i; |
2257 | |
2258 | err = cmd_start(dev, uid: opaluid[OPAL_LOCKINGSP_UID], |
2259 | method: opalmethod[OPAL_ACTIVATE]); |
2260 | |
2261 | if (opal_act->sum) { |
2262 | err = build_locking_range(buffer: user_lr, length: sizeof(user_lr), |
2263 | lr: opal_act->lr[0]); |
2264 | if (err) |
2265 | return err; |
2266 | |
2267 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
2268 | add_token_u64(err: &err, cmd: dev, number: OPAL_SUM_SET_LIST); |
2269 | |
2270 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
2271 | add_token_bytestring(err: &err, cmd: dev, bytestring: user_lr, OPAL_UID_LENGTH); |
2272 | for (i = 1; i < opal_act->num_lrs; i++) { |
2273 | user_lr[7] = opal_act->lr[i]; |
2274 | add_token_bytestring(err: &err, cmd: dev, bytestring: user_lr, OPAL_UID_LENGTH); |
2275 | } |
2276 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
2277 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
2278 | } |
2279 | |
2280 | if (err) { |
2281 | pr_debug("Error building Activate LockingSP command.\n" ); |
2282 | return err; |
2283 | } |
2284 | |
2285 | return finalize_and_send(dev, cont: parse_and_check_status); |
2286 | } |
2287 | |
2288 | /* Determine if we're in the Manufactured Inactive or Active state */ |
2289 | static int get_lsp_lifecycle(struct opal_dev *dev, void *data) |
2290 | { |
2291 | u8 lc_status; |
2292 | int err; |
2293 | |
2294 | err = generic_get_column(dev, table: opaluid[OPAL_LOCKINGSP_UID], |
2295 | column: OPAL_LIFECYCLE); |
2296 | if (err) |
2297 | return err; |
2298 | |
2299 | lc_status = response_get_u64(resp: &dev->parsed, n: 4); |
2300 | /* 0x08 is Manufactured Inactive */ |
2301 | /* 0x09 is Manufactured */ |
2302 | if (lc_status != OPAL_MANUFACTURED_INACTIVE) { |
2303 | pr_debug("Couldn't determine the status of the Lifecycle state\n" ); |
2304 | return -ENODEV; |
2305 | } |
2306 | |
2307 | return 0; |
2308 | } |
2309 | |
2310 | static int get_msid_cpin_pin(struct opal_dev *dev, void *data) |
2311 | { |
2312 | const char *msid_pin; |
2313 | size_t strlen; |
2314 | int err; |
2315 | |
2316 | err = generic_get_column(dev, table: opaluid[OPAL_C_PIN_MSID], column: OPAL_PIN); |
2317 | if (err) |
2318 | return err; |
2319 | |
2320 | strlen = response_get_string(resp: &dev->parsed, n: 4, store: &msid_pin); |
2321 | if (!msid_pin) { |
2322 | pr_debug("Couldn't extract MSID_CPIN from response\n" ); |
2323 | return OPAL_INVAL_PARAM; |
2324 | } |
2325 | |
2326 | dev->prev_data = kmemdup(p: msid_pin, size: strlen, GFP_KERNEL); |
2327 | if (!dev->prev_data) |
2328 | return -ENOMEM; |
2329 | |
2330 | dev->prev_d_len = strlen; |
2331 | |
2332 | return 0; |
2333 | } |
2334 | |
2335 | static int write_table_data(struct opal_dev *dev, void *data) |
2336 | { |
2337 | struct opal_read_write_table *write_tbl = data; |
2338 | |
2339 | return generic_table_write_data(dev, data: write_tbl->data, offset: write_tbl->offset, |
2340 | size: write_tbl->size, uid: write_tbl->table_uid); |
2341 | } |
2342 | |
2343 | static int read_table_data_cont(struct opal_dev *dev) |
2344 | { |
2345 | int err; |
2346 | const char *data_read; |
2347 | |
2348 | err = parse_and_check_status(dev); |
2349 | if (err) |
2350 | return err; |
2351 | |
2352 | dev->prev_d_len = response_get_string(resp: &dev->parsed, n: 1, store: &data_read); |
2353 | dev->prev_data = (void *)data_read; |
2354 | if (!dev->prev_data) { |
2355 | pr_debug("%s: Couldn't read data from the table.\n" , __func__); |
2356 | return OPAL_INVAL_PARAM; |
2357 | } |
2358 | |
2359 | return 0; |
2360 | } |
2361 | |
2362 | /* |
2363 | * IO_BUFFER_LENGTH = 2048 |
2364 | * sizeof(header) = 56 |
2365 | * No. of Token Bytes in the Response = 11 |
2366 | * MAX size of data that can be carried in response buffer |
2367 | * at a time is : 2048 - (56 + 11) = 1981 = 0x7BD. |
2368 | */ |
2369 | #define OPAL_MAX_READ_TABLE (0x7BD) |
2370 | |
2371 | static int read_table_data(struct opal_dev *dev, void *data) |
2372 | { |
2373 | struct opal_read_write_table *read_tbl = data; |
2374 | int err; |
2375 | size_t off = 0, max_read_size = OPAL_MAX_READ_TABLE; |
2376 | u64 table_len, len; |
2377 | u64 offset = read_tbl->offset, read_size = read_tbl->size - 1; |
2378 | u8 __user *dst; |
2379 | |
2380 | err = generic_get_table_info(dev, table_uid: read_tbl->table_uid, column: OPAL_TABLE_ROWS); |
2381 | if (err) { |
2382 | pr_debug("Couldn't get the table size\n" ); |
2383 | return err; |
2384 | } |
2385 | |
2386 | table_len = response_get_u64(resp: &dev->parsed, n: 4); |
2387 | |
2388 | /* Check if the user is trying to read from the table limits */ |
2389 | if (read_size > table_len || offset > table_len - read_size) { |
2390 | pr_debug("Read size exceeds the Table size limits (%llu vs. %llu)\n" , |
2391 | offset + read_size, table_len); |
2392 | return -EINVAL; |
2393 | } |
2394 | |
2395 | while (off < read_size) { |
2396 | err = cmd_start(dev, uid: read_tbl->table_uid, method: opalmethod[OPAL_GET]); |
2397 | |
2398 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTLIST); |
2399 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
2400 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTROW); |
2401 | add_token_u64(err: &err, cmd: dev, number: offset + off); /* start row value */ |
2402 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
2403 | |
2404 | add_token_u8(err: &err, cmd: dev, tok: OPAL_STARTNAME); |
2405 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDROW); |
2406 | |
2407 | len = min(max_read_size, (size_t)(read_size - off)); |
2408 | add_token_u64(err: &err, cmd: dev, number: offset + off + len); /* end row value |
2409 | */ |
2410 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDNAME); |
2411 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDLIST); |
2412 | |
2413 | if (err) { |
2414 | pr_debug("Error building read table data command.\n" ); |
2415 | break; |
2416 | } |
2417 | |
2418 | err = finalize_and_send(dev, cont: read_table_data_cont); |
2419 | if (err) |
2420 | break; |
2421 | |
2422 | /* len+1: This includes the NULL terminator at the end*/ |
2423 | if (dev->prev_d_len > len + 1) { |
2424 | err = -EOVERFLOW; |
2425 | break; |
2426 | } |
2427 | |
2428 | dst = (u8 __user *)(uintptr_t)read_tbl->data; |
2429 | if (copy_to_user(to: dst + off, from: dev->prev_data, n: dev->prev_d_len)) { |
2430 | pr_debug("Error copying data to userspace\n" ); |
2431 | err = -EFAULT; |
2432 | break; |
2433 | } |
2434 | dev->prev_data = NULL; |
2435 | |
2436 | off += len; |
2437 | } |
2438 | |
2439 | return err; |
2440 | } |
2441 | |
2442 | static int end_opal_session(struct opal_dev *dev, void *data) |
2443 | { |
2444 | int err = 0; |
2445 | |
2446 | clear_opal_cmd(dev); |
2447 | set_comid(cmd: dev, comid: dev->comid); |
2448 | add_token_u8(err: &err, cmd: dev, tok: OPAL_ENDOFSESSION); |
2449 | |
2450 | if (err < 0) |
2451 | return err; |
2452 | |
2453 | return finalize_and_send(dev, cont: end_session_cont); |
2454 | } |
2455 | |
2456 | static int end_opal_session_error(struct opal_dev *dev) |
2457 | { |
2458 | const struct opal_step error_end_session = { |
2459 | end_opal_session, |
2460 | }; |
2461 | |
2462 | return execute_step(dev, step: &error_end_session, stepIndex: 0); |
2463 | } |
2464 | |
2465 | static inline void setup_opal_dev(struct opal_dev *dev) |
2466 | { |
2467 | dev->tsn = 0; |
2468 | dev->hsn = 0; |
2469 | dev->prev_data = NULL; |
2470 | } |
2471 | |
2472 | static int check_opal_support(struct opal_dev *dev) |
2473 | { |
2474 | int ret; |
2475 | |
2476 | mutex_lock(&dev->dev_lock); |
2477 | setup_opal_dev(dev); |
2478 | ret = opal_discovery0_step(dev); |
2479 | if (!ret) |
2480 | dev->flags |= OPAL_FL_SUPPORTED; |
2481 | mutex_unlock(lock: &dev->dev_lock); |
2482 | |
2483 | return ret; |
2484 | } |
2485 | |
2486 | static void clean_opal_dev(struct opal_dev *dev) |
2487 | { |
2488 | |
2489 | struct opal_suspend_data *suspend, *next; |
2490 | |
2491 | mutex_lock(&dev->dev_lock); |
2492 | list_for_each_entry_safe(suspend, next, &dev->unlk_lst, node) { |
2493 | list_del(entry: &suspend->node); |
2494 | kfree(objp: suspend); |
2495 | } |
2496 | mutex_unlock(lock: &dev->dev_lock); |
2497 | } |
2498 | |
2499 | void free_opal_dev(struct opal_dev *dev) |
2500 | { |
2501 | if (!dev) |
2502 | return; |
2503 | |
2504 | clean_opal_dev(dev); |
2505 | kfree(objp: dev->resp); |
2506 | kfree(objp: dev->cmd); |
2507 | kfree(objp: dev); |
2508 | } |
2509 | EXPORT_SYMBOL(free_opal_dev); |
2510 | |
2511 | struct opal_dev *init_opal_dev(void *data, sec_send_recv *send_recv) |
2512 | { |
2513 | struct opal_dev *dev; |
2514 | |
2515 | dev = kmalloc(size: sizeof(*dev), GFP_KERNEL); |
2516 | if (!dev) |
2517 | return NULL; |
2518 | |
2519 | /* |
2520 | * Presumably DMA-able buffers must be cache-aligned. Kmalloc makes |
2521 | * sure the allocated buffer is DMA-safe in that regard. |
2522 | */ |
2523 | dev->cmd = kmalloc(IO_BUFFER_LENGTH, GFP_KERNEL); |
2524 | if (!dev->cmd) |
2525 | goto err_free_dev; |
2526 | |
2527 | dev->resp = kmalloc(IO_BUFFER_LENGTH, GFP_KERNEL); |
2528 | if (!dev->resp) |
2529 | goto err_free_cmd; |
2530 | |
2531 | INIT_LIST_HEAD(list: &dev->unlk_lst); |
2532 | mutex_init(&dev->dev_lock); |
2533 | dev->flags = 0; |
2534 | dev->data = data; |
2535 | dev->send_recv = send_recv; |
2536 | if (check_opal_support(dev) != 0) { |
2537 | pr_debug("Opal is not supported on this device\n" ); |
2538 | goto err_free_resp; |
2539 | } |
2540 | |
2541 | return dev; |
2542 | |
2543 | err_free_resp: |
2544 | kfree(objp: dev->resp); |
2545 | |
2546 | err_free_cmd: |
2547 | kfree(objp: dev->cmd); |
2548 | |
2549 | err_free_dev: |
2550 | kfree(objp: dev); |
2551 | |
2552 | return NULL; |
2553 | } |
2554 | EXPORT_SYMBOL(init_opal_dev); |
2555 | |
2556 | static int opal_secure_erase_locking_range(struct opal_dev *dev, |
2557 | struct opal_session_info *opal_session) |
2558 | { |
2559 | const struct opal_step erase_steps[] = { |
2560 | { start_auth_opal_session, opal_session }, |
2561 | { get_active_key, &opal_session->opal_key.lr }, |
2562 | { gen_key, }, |
2563 | { end_opal_session, } |
2564 | }; |
2565 | int ret; |
2566 | |
2567 | ret = opal_get_key(dev, key: &opal_session->opal_key); |
2568 | if (ret) |
2569 | return ret; |
2570 | mutex_lock(&dev->dev_lock); |
2571 | setup_opal_dev(dev); |
2572 | ret = execute_steps(dev, steps: erase_steps, ARRAY_SIZE(erase_steps)); |
2573 | mutex_unlock(lock: &dev->dev_lock); |
2574 | |
2575 | return ret; |
2576 | } |
2577 | |
2578 | static int opal_get_discv(struct opal_dev *dev, struct opal_discovery *discv) |
2579 | { |
2580 | const struct opal_step discovery0_step = { |
2581 | opal_discovery0, discv |
2582 | }; |
2583 | int ret; |
2584 | |
2585 | mutex_lock(&dev->dev_lock); |
2586 | setup_opal_dev(dev); |
2587 | ret = execute_step(dev, step: &discovery0_step, stepIndex: 0); |
2588 | mutex_unlock(lock: &dev->dev_lock); |
2589 | if (ret) |
2590 | return ret; |
2591 | return discv->size; /* modified to actual length of data */ |
2592 | } |
2593 | |
2594 | static int opal_revertlsp(struct opal_dev *dev, struct opal_revert_lsp *rev) |
2595 | { |
2596 | /* controller will terminate session */ |
2597 | const struct opal_step steps[] = { |
2598 | { start_admin1LSP_opal_session, &rev->key }, |
2599 | { revert_lsp, rev } |
2600 | }; |
2601 | int ret; |
2602 | |
2603 | ret = opal_get_key(dev, key: &rev->key); |
2604 | if (ret) |
2605 | return ret; |
2606 | mutex_lock(&dev->dev_lock); |
2607 | setup_opal_dev(dev); |
2608 | ret = execute_steps(dev, steps, ARRAY_SIZE(steps)); |
2609 | mutex_unlock(lock: &dev->dev_lock); |
2610 | |
2611 | return ret; |
2612 | } |
2613 | |
2614 | static int opal_erase_locking_range(struct opal_dev *dev, |
2615 | struct opal_session_info *opal_session) |
2616 | { |
2617 | const struct opal_step erase_steps[] = { |
2618 | { start_auth_opal_session, opal_session }, |
2619 | { erase_locking_range, opal_session }, |
2620 | { end_opal_session, } |
2621 | }; |
2622 | int ret; |
2623 | |
2624 | ret = opal_get_key(dev, key: &opal_session->opal_key); |
2625 | if (ret) |
2626 | return ret; |
2627 | mutex_lock(&dev->dev_lock); |
2628 | setup_opal_dev(dev); |
2629 | ret = execute_steps(dev, steps: erase_steps, ARRAY_SIZE(erase_steps)); |
2630 | mutex_unlock(lock: &dev->dev_lock); |
2631 | |
2632 | return ret; |
2633 | } |
2634 | |
2635 | static int opal_enable_disable_shadow_mbr(struct opal_dev *dev, |
2636 | struct opal_mbr_data *opal_mbr) |
2637 | { |
2638 | u8 enable_disable = opal_mbr->enable_disable == OPAL_MBR_ENABLE ? |
2639 | OPAL_TRUE : OPAL_FALSE; |
2640 | |
2641 | const struct opal_step mbr_steps[] = { |
2642 | { start_admin1LSP_opal_session, &opal_mbr->key }, |
2643 | { set_mbr_done, &enable_disable }, |
2644 | { end_opal_session, }, |
2645 | { start_admin1LSP_opal_session, &opal_mbr->key }, |
2646 | { set_mbr_enable_disable, &enable_disable }, |
2647 | { end_opal_session, } |
2648 | }; |
2649 | int ret; |
2650 | |
2651 | if (opal_mbr->enable_disable != OPAL_MBR_ENABLE && |
2652 | opal_mbr->enable_disable != OPAL_MBR_DISABLE) |
2653 | return -EINVAL; |
2654 | |
2655 | ret = opal_get_key(dev, key: &opal_mbr->key); |
2656 | if (ret) |
2657 | return ret; |
2658 | mutex_lock(&dev->dev_lock); |
2659 | setup_opal_dev(dev); |
2660 | ret = execute_steps(dev, steps: mbr_steps, ARRAY_SIZE(mbr_steps)); |
2661 | mutex_unlock(lock: &dev->dev_lock); |
2662 | |
2663 | return ret; |
2664 | } |
2665 | |
2666 | static int opal_set_mbr_done(struct opal_dev *dev, |
2667 | struct opal_mbr_done *mbr_done) |
2668 | { |
2669 | u8 mbr_done_tf = mbr_done->done_flag == OPAL_MBR_DONE ? |
2670 | OPAL_TRUE : OPAL_FALSE; |
2671 | |
2672 | const struct opal_step mbr_steps[] = { |
2673 | { start_admin1LSP_opal_session, &mbr_done->key }, |
2674 | { set_mbr_done, &mbr_done_tf }, |
2675 | { end_opal_session, } |
2676 | }; |
2677 | int ret; |
2678 | |
2679 | if (mbr_done->done_flag != OPAL_MBR_DONE && |
2680 | mbr_done->done_flag != OPAL_MBR_NOT_DONE) |
2681 | return -EINVAL; |
2682 | |
2683 | ret = opal_get_key(dev, key: &mbr_done->key); |
2684 | if (ret) |
2685 | return ret; |
2686 | mutex_lock(&dev->dev_lock); |
2687 | setup_opal_dev(dev); |
2688 | ret = execute_steps(dev, steps: mbr_steps, ARRAY_SIZE(mbr_steps)); |
2689 | mutex_unlock(lock: &dev->dev_lock); |
2690 | |
2691 | return ret; |
2692 | } |
2693 | |
2694 | static int opal_write_shadow_mbr(struct opal_dev *dev, |
2695 | struct opal_shadow_mbr *info) |
2696 | { |
2697 | const struct opal_step mbr_steps[] = { |
2698 | { start_admin1LSP_opal_session, &info->key }, |
2699 | { write_shadow_mbr, info }, |
2700 | { end_opal_session, } |
2701 | }; |
2702 | int ret; |
2703 | |
2704 | if (info->size == 0) |
2705 | return 0; |
2706 | |
2707 | ret = opal_get_key(dev, key: &info->key); |
2708 | if (ret) |
2709 | return ret; |
2710 | mutex_lock(&dev->dev_lock); |
2711 | setup_opal_dev(dev); |
2712 | ret = execute_steps(dev, steps: mbr_steps, ARRAY_SIZE(mbr_steps)); |
2713 | mutex_unlock(lock: &dev->dev_lock); |
2714 | |
2715 | return ret; |
2716 | } |
2717 | |
2718 | static int opal_save(struct opal_dev *dev, struct opal_lock_unlock *lk_unlk) |
2719 | { |
2720 | struct opal_suspend_data *suspend; |
2721 | |
2722 | suspend = kzalloc(size: sizeof(*suspend), GFP_KERNEL); |
2723 | if (!suspend) |
2724 | return -ENOMEM; |
2725 | |
2726 | suspend->unlk = *lk_unlk; |
2727 | suspend->lr = lk_unlk->session.opal_key.lr; |
2728 | |
2729 | mutex_lock(&dev->dev_lock); |
2730 | setup_opal_dev(dev); |
2731 | add_suspend_info(dev, sus: suspend); |
2732 | mutex_unlock(lock: &dev->dev_lock); |
2733 | |
2734 | return 0; |
2735 | } |
2736 | |
2737 | static int opal_add_user_to_lr(struct opal_dev *dev, |
2738 | struct opal_lock_unlock *lk_unlk) |
2739 | { |
2740 | const struct opal_step steps[] = { |
2741 | { start_admin1LSP_opal_session, &lk_unlk->session.opal_key }, |
2742 | { add_user_to_lr, lk_unlk }, |
2743 | { add_user_to_lr_ace, lk_unlk }, |
2744 | { end_opal_session, } |
2745 | }; |
2746 | int ret; |
2747 | |
2748 | if (lk_unlk->l_state != OPAL_RO && |
2749 | lk_unlk->l_state != OPAL_RW) { |
2750 | pr_debug("Locking state was not RO or RW\n" ); |
2751 | return -EINVAL; |
2752 | } |
2753 | |
2754 | if (lk_unlk->session.who < OPAL_USER1 || |
2755 | lk_unlk->session.who > OPAL_USER9) { |
2756 | pr_debug("Authority was not within the range of users: %d\n" , |
2757 | lk_unlk->session.who); |
2758 | return -EINVAL; |
2759 | } |
2760 | |
2761 | if (lk_unlk->session.sum) { |
2762 | pr_debug("%s not supported in sum. Use setup locking range\n" , |
2763 | __func__); |
2764 | return -EINVAL; |
2765 | } |
2766 | |
2767 | ret = opal_get_key(dev, key: &lk_unlk->session.opal_key); |
2768 | if (ret) |
2769 | return ret; |
2770 | mutex_lock(&dev->dev_lock); |
2771 | setup_opal_dev(dev); |
2772 | ret = execute_steps(dev, steps, ARRAY_SIZE(steps)); |
2773 | mutex_unlock(lock: &dev->dev_lock); |
2774 | |
2775 | return ret; |
2776 | } |
2777 | |
2778 | static int opal_reverttper(struct opal_dev *dev, struct opal_key *opal, bool psid) |
2779 | { |
2780 | /* controller will terminate session */ |
2781 | const struct opal_step revert_steps[] = { |
2782 | { start_SIDASP_opal_session, opal }, |
2783 | { revert_tper, } |
2784 | }; |
2785 | const struct opal_step psid_revert_steps[] = { |
2786 | { start_PSID_opal_session, opal }, |
2787 | { revert_tper, } |
2788 | }; |
2789 | |
2790 | int ret; |
2791 | |
2792 | ret = opal_get_key(dev, key: opal); |
2793 | |
2794 | if (ret) |
2795 | return ret; |
2796 | mutex_lock(&dev->dev_lock); |
2797 | setup_opal_dev(dev); |
2798 | if (psid) |
2799 | ret = execute_steps(dev, steps: psid_revert_steps, |
2800 | ARRAY_SIZE(psid_revert_steps)); |
2801 | else |
2802 | ret = execute_steps(dev, steps: revert_steps, |
2803 | ARRAY_SIZE(revert_steps)); |
2804 | mutex_unlock(lock: &dev->dev_lock); |
2805 | |
2806 | /* |
2807 | * If we successfully reverted lets clean |
2808 | * any saved locking ranges. |
2809 | */ |
2810 | if (!ret) |
2811 | clean_opal_dev(dev); |
2812 | |
2813 | return ret; |
2814 | } |
2815 | |
2816 | static int __opal_lock_unlock(struct opal_dev *dev, |
2817 | struct opal_lock_unlock *lk_unlk) |
2818 | { |
2819 | const struct opal_step unlock_steps[] = { |
2820 | { start_auth_opal_session, &lk_unlk->session }, |
2821 | { lock_unlock_locking_range, lk_unlk }, |
2822 | { end_opal_session, } |
2823 | }; |
2824 | const struct opal_step unlock_sum_steps[] = { |
2825 | { start_auth_opal_session, &lk_unlk->session }, |
2826 | { lock_unlock_locking_range_sum, lk_unlk }, |
2827 | { end_opal_session, } |
2828 | }; |
2829 | |
2830 | if (lk_unlk->session.sum) |
2831 | return execute_steps(dev, steps: unlock_sum_steps, |
2832 | ARRAY_SIZE(unlock_sum_steps)); |
2833 | else |
2834 | return execute_steps(dev, steps: unlock_steps, |
2835 | ARRAY_SIZE(unlock_steps)); |
2836 | } |
2837 | |
2838 | static int __opal_set_mbr_done(struct opal_dev *dev, struct opal_key *key) |
2839 | { |
2840 | u8 mbr_done_tf = OPAL_TRUE; |
2841 | const struct opal_step mbrdone_step[] = { |
2842 | { start_admin1LSP_opal_session, key }, |
2843 | { set_mbr_done, &mbr_done_tf }, |
2844 | { end_opal_session, } |
2845 | }; |
2846 | |
2847 | return execute_steps(dev, steps: mbrdone_step, ARRAY_SIZE(mbrdone_step)); |
2848 | } |
2849 | |
2850 | static void opal_lock_check_for_saved_key(struct opal_dev *dev, |
2851 | struct opal_lock_unlock *lk_unlk) |
2852 | { |
2853 | struct opal_suspend_data *iter; |
2854 | |
2855 | if (lk_unlk->l_state != OPAL_LK || |
2856 | lk_unlk->session.opal_key.key_len > 0) |
2857 | return; |
2858 | |
2859 | /* |
2860 | * Usually when closing a crypto device (eg: dm-crypt with LUKS) the |
2861 | * volume key is not required, as it requires root privileges anyway, |
2862 | * and root can deny access to a disk in many ways regardless. |
2863 | * Requiring the volume key to lock the device is a peculiarity of the |
2864 | * OPAL specification. Given we might already have saved the key if |
2865 | * the user requested it via the 'IOC_OPAL_SAVE' ioctl, we can use |
2866 | * that key to lock the device if no key was provided here, the |
2867 | * locking range matches and the appropriate flag was passed with |
2868 | * 'IOC_OPAL_SAVE'. |
2869 | * This allows integrating OPAL with tools and libraries that are used |
2870 | * to the common behaviour and do not ask for the volume key when |
2871 | * closing a device. |
2872 | */ |
2873 | setup_opal_dev(dev); |
2874 | list_for_each_entry(iter, &dev->unlk_lst, node) { |
2875 | if ((iter->unlk.flags & OPAL_SAVE_FOR_LOCK) && |
2876 | iter->lr == lk_unlk->session.opal_key.lr && |
2877 | iter->unlk.session.opal_key.key_len > 0) { |
2878 | lk_unlk->session.opal_key.key_len = |
2879 | iter->unlk.session.opal_key.key_len; |
2880 | memcpy(lk_unlk->session.opal_key.key, |
2881 | iter->unlk.session.opal_key.key, |
2882 | iter->unlk.session.opal_key.key_len); |
2883 | break; |
2884 | } |
2885 | } |
2886 | } |
2887 | |
2888 | static int opal_lock_unlock(struct opal_dev *dev, |
2889 | struct opal_lock_unlock *lk_unlk) |
2890 | { |
2891 | int ret; |
2892 | |
2893 | if (lk_unlk->session.who > OPAL_USER9) |
2894 | return -EINVAL; |
2895 | |
2896 | mutex_lock(&dev->dev_lock); |
2897 | opal_lock_check_for_saved_key(dev, lk_unlk); |
2898 | ret = opal_get_key(dev, key: &lk_unlk->session.opal_key); |
2899 | if (!ret) |
2900 | ret = __opal_lock_unlock(dev, lk_unlk); |
2901 | mutex_unlock(lock: &dev->dev_lock); |
2902 | |
2903 | return ret; |
2904 | } |
2905 | |
2906 | static int opal_take_ownership(struct opal_dev *dev, struct opal_key *opal) |
2907 | { |
2908 | const struct opal_step owner_steps[] = { |
2909 | { start_anybodyASP_opal_session, }, |
2910 | { get_msid_cpin_pin, }, |
2911 | { end_opal_session, }, |
2912 | { start_SIDASP_opal_session, opal }, |
2913 | { set_sid_cpin_pin, opal }, |
2914 | { end_opal_session, } |
2915 | }; |
2916 | int ret; |
2917 | |
2918 | if (!dev) |
2919 | return -ENODEV; |
2920 | |
2921 | ret = opal_get_key(dev, key: opal); |
2922 | if (ret) |
2923 | return ret; |
2924 | mutex_lock(&dev->dev_lock); |
2925 | setup_opal_dev(dev); |
2926 | ret = execute_steps(dev, steps: owner_steps, ARRAY_SIZE(owner_steps)); |
2927 | mutex_unlock(lock: &dev->dev_lock); |
2928 | |
2929 | return ret; |
2930 | } |
2931 | |
2932 | static int opal_activate_lsp(struct opal_dev *dev, |
2933 | struct opal_lr_act *opal_lr_act) |
2934 | { |
2935 | const struct opal_step active_steps[] = { |
2936 | { start_SIDASP_opal_session, &opal_lr_act->key }, |
2937 | { get_lsp_lifecycle, }, |
2938 | { activate_lsp, opal_lr_act }, |
2939 | { end_opal_session, } |
2940 | }; |
2941 | int ret; |
2942 | |
2943 | if (!opal_lr_act->num_lrs || opal_lr_act->num_lrs > OPAL_MAX_LRS) |
2944 | return -EINVAL; |
2945 | |
2946 | ret = opal_get_key(dev, key: &opal_lr_act->key); |
2947 | if (ret) |
2948 | return ret; |
2949 | mutex_lock(&dev->dev_lock); |
2950 | setup_opal_dev(dev); |
2951 | ret = execute_steps(dev, steps: active_steps, ARRAY_SIZE(active_steps)); |
2952 | mutex_unlock(lock: &dev->dev_lock); |
2953 | |
2954 | return ret; |
2955 | } |
2956 | |
2957 | static int opal_setup_locking_range(struct opal_dev *dev, |
2958 | struct opal_user_lr_setup *opal_lrs) |
2959 | { |
2960 | const struct opal_step lr_steps[] = { |
2961 | { start_auth_opal_session, &opal_lrs->session }, |
2962 | { setup_locking_range, opal_lrs }, |
2963 | { end_opal_session, } |
2964 | }; |
2965 | int ret; |
2966 | |
2967 | ret = opal_get_key(dev, key: &opal_lrs->session.opal_key); |
2968 | if (ret) |
2969 | return ret; |
2970 | mutex_lock(&dev->dev_lock); |
2971 | setup_opal_dev(dev); |
2972 | ret = execute_steps(dev, steps: lr_steps, ARRAY_SIZE(lr_steps)); |
2973 | mutex_unlock(lock: &dev->dev_lock); |
2974 | |
2975 | return ret; |
2976 | } |
2977 | |
2978 | static int opal_locking_range_status(struct opal_dev *dev, |
2979 | struct opal_lr_status *opal_lrst, |
2980 | void __user *data) |
2981 | { |
2982 | const struct opal_step lr_steps[] = { |
2983 | { start_auth_opal_session, &opal_lrst->session }, |
2984 | { locking_range_status, opal_lrst }, |
2985 | { end_opal_session, } |
2986 | }; |
2987 | int ret; |
2988 | |
2989 | mutex_lock(&dev->dev_lock); |
2990 | setup_opal_dev(dev); |
2991 | ret = execute_steps(dev, steps: lr_steps, ARRAY_SIZE(lr_steps)); |
2992 | mutex_unlock(lock: &dev->dev_lock); |
2993 | |
2994 | /* skip session info when copying back to uspace */ |
2995 | if (!ret && copy_to_user(to: data + offsetof(struct opal_lr_status, range_start), |
2996 | from: (void *)opal_lrst + offsetof(struct opal_lr_status, range_start), |
2997 | n: sizeof(*opal_lrst) - offsetof(struct opal_lr_status, range_start))) { |
2998 | pr_debug("Error copying status to userspace\n" ); |
2999 | return -EFAULT; |
3000 | } |
3001 | |
3002 | return ret; |
3003 | } |
3004 | |
3005 | static int opal_set_new_pw(struct opal_dev *dev, struct opal_new_pw *opal_pw) |
3006 | { |
3007 | const struct opal_step pw_steps[] = { |
3008 | { start_auth_opal_session, &opal_pw->session }, |
3009 | { set_new_pw, &opal_pw->new_user_pw }, |
3010 | { end_opal_session, } |
3011 | }; |
3012 | int ret; |
3013 | |
3014 | if (opal_pw->session.who > OPAL_USER9 || |
3015 | opal_pw->new_user_pw.who > OPAL_USER9) |
3016 | return -EINVAL; |
3017 | |
3018 | mutex_lock(&dev->dev_lock); |
3019 | setup_opal_dev(dev); |
3020 | ret = execute_steps(dev, steps: pw_steps, ARRAY_SIZE(pw_steps)); |
3021 | mutex_unlock(lock: &dev->dev_lock); |
3022 | |
3023 | if (ret) |
3024 | return ret; |
3025 | |
3026 | /* update keyring and key store with new password */ |
3027 | ret = sed_write_key(OPAL_AUTH_KEY, |
3028 | key: opal_pw->new_user_pw.opal_key.key, |
3029 | keylen: opal_pw->new_user_pw.opal_key.key_len); |
3030 | if (ret != -EOPNOTSUPP) |
3031 | pr_warn("error updating SED key: %d\n" , ret); |
3032 | |
3033 | ret = update_sed_opal_key(OPAL_AUTH_KEY, |
3034 | key_data: opal_pw->new_user_pw.opal_key.key, |
3035 | keylen: opal_pw->new_user_pw.opal_key.key_len); |
3036 | |
3037 | return ret; |
3038 | } |
3039 | |
3040 | static int opal_activate_user(struct opal_dev *dev, |
3041 | struct opal_session_info *opal_session) |
3042 | { |
3043 | const struct opal_step act_steps[] = { |
3044 | { start_admin1LSP_opal_session, &opal_session->opal_key }, |
3045 | { internal_activate_user, opal_session }, |
3046 | { end_opal_session, } |
3047 | }; |
3048 | int ret; |
3049 | |
3050 | /* We can't activate Admin1 it's active as manufactured */ |
3051 | if (opal_session->who < OPAL_USER1 || |
3052 | opal_session->who > OPAL_USER9) { |
3053 | pr_debug("Who was not a valid user: %d\n" , opal_session->who); |
3054 | return -EINVAL; |
3055 | } |
3056 | |
3057 | ret = opal_get_key(dev, key: &opal_session->opal_key); |
3058 | if (ret) |
3059 | return ret; |
3060 | mutex_lock(&dev->dev_lock); |
3061 | setup_opal_dev(dev); |
3062 | ret = execute_steps(dev, steps: act_steps, ARRAY_SIZE(act_steps)); |
3063 | mutex_unlock(lock: &dev->dev_lock); |
3064 | |
3065 | return ret; |
3066 | } |
3067 | |
3068 | bool opal_unlock_from_suspend(struct opal_dev *dev) |
3069 | { |
3070 | struct opal_suspend_data *suspend; |
3071 | bool was_failure = false; |
3072 | int ret; |
3073 | |
3074 | if (!dev) |
3075 | return false; |
3076 | |
3077 | if (!(dev->flags & OPAL_FL_SUPPORTED)) |
3078 | return false; |
3079 | |
3080 | mutex_lock(&dev->dev_lock); |
3081 | setup_opal_dev(dev); |
3082 | |
3083 | list_for_each_entry(suspend, &dev->unlk_lst, node) { |
3084 | dev->tsn = 0; |
3085 | dev->hsn = 0; |
3086 | |
3087 | ret = __opal_lock_unlock(dev, lk_unlk: &suspend->unlk); |
3088 | if (ret) { |
3089 | pr_debug("Failed to unlock LR %hhu with sum %d\n" , |
3090 | suspend->unlk.session.opal_key.lr, |
3091 | suspend->unlk.session.sum); |
3092 | was_failure = true; |
3093 | } |
3094 | |
3095 | if (dev->flags & OPAL_FL_MBR_ENABLED) { |
3096 | ret = __opal_set_mbr_done(dev, key: &suspend->unlk.session.opal_key); |
3097 | if (ret) |
3098 | pr_debug("Failed to set MBR Done in S3 resume\n" ); |
3099 | } |
3100 | } |
3101 | mutex_unlock(lock: &dev->dev_lock); |
3102 | |
3103 | return was_failure; |
3104 | } |
3105 | EXPORT_SYMBOL(opal_unlock_from_suspend); |
3106 | |
3107 | static int opal_read_table(struct opal_dev *dev, |
3108 | struct opal_read_write_table *rw_tbl) |
3109 | { |
3110 | const struct opal_step read_table_steps[] = { |
3111 | { start_admin1LSP_opal_session, &rw_tbl->key }, |
3112 | { read_table_data, rw_tbl }, |
3113 | { end_opal_session, } |
3114 | }; |
3115 | |
3116 | if (!rw_tbl->size) |
3117 | return 0; |
3118 | |
3119 | return execute_steps(dev, steps: read_table_steps, |
3120 | ARRAY_SIZE(read_table_steps)); |
3121 | } |
3122 | |
3123 | static int opal_write_table(struct opal_dev *dev, |
3124 | struct opal_read_write_table *rw_tbl) |
3125 | { |
3126 | const struct opal_step write_table_steps[] = { |
3127 | { start_admin1LSP_opal_session, &rw_tbl->key }, |
3128 | { write_table_data, rw_tbl }, |
3129 | { end_opal_session, } |
3130 | }; |
3131 | |
3132 | if (!rw_tbl->size) |
3133 | return 0; |
3134 | |
3135 | return execute_steps(dev, steps: write_table_steps, |
3136 | ARRAY_SIZE(write_table_steps)); |
3137 | } |
3138 | |
3139 | static int opal_generic_read_write_table(struct opal_dev *dev, |
3140 | struct opal_read_write_table *rw_tbl) |
3141 | { |
3142 | int ret, bit_set; |
3143 | |
3144 | ret = opal_get_key(dev, key: &rw_tbl->key); |
3145 | if (ret) |
3146 | return ret; |
3147 | mutex_lock(&dev->dev_lock); |
3148 | setup_opal_dev(dev); |
3149 | |
3150 | bit_set = fls64(x: rw_tbl->flags) - 1; |
3151 | switch (bit_set) { |
3152 | case OPAL_READ_TABLE: |
3153 | ret = opal_read_table(dev, rw_tbl); |
3154 | break; |
3155 | case OPAL_WRITE_TABLE: |
3156 | ret = opal_write_table(dev, rw_tbl); |
3157 | break; |
3158 | default: |
3159 | pr_debug("Invalid bit set in the flag (%016llx).\n" , |
3160 | rw_tbl->flags); |
3161 | ret = -EINVAL; |
3162 | break; |
3163 | } |
3164 | |
3165 | mutex_unlock(lock: &dev->dev_lock); |
3166 | |
3167 | return ret; |
3168 | } |
3169 | |
3170 | static int opal_get_status(struct opal_dev *dev, void __user *data) |
3171 | { |
3172 | struct opal_status sts = {0}; |
3173 | |
3174 | /* |
3175 | * check_opal_support() error is not fatal, |
3176 | * !dev->supported is a valid condition |
3177 | */ |
3178 | if (!check_opal_support(dev)) |
3179 | sts.flags = dev->flags; |
3180 | if (copy_to_user(to: data, from: &sts, n: sizeof(sts))) { |
3181 | pr_debug("Error copying status to userspace\n" ); |
3182 | return -EFAULT; |
3183 | } |
3184 | return 0; |
3185 | } |
3186 | |
3187 | static int opal_get_geometry(struct opal_dev *dev, void __user *data) |
3188 | { |
3189 | struct opal_geometry geo = {0}; |
3190 | |
3191 | if (check_opal_support(dev)) |
3192 | return -EINVAL; |
3193 | |
3194 | geo.align = dev->align_required; |
3195 | geo.logical_block_size = dev->logical_block_size; |
3196 | geo.alignment_granularity = dev->align; |
3197 | geo.lowest_aligned_lba = dev->lowest_lba; |
3198 | |
3199 | if (copy_to_user(to: data, from: &geo, n: sizeof(geo))) { |
3200 | pr_debug("Error copying geometry data to userspace\n" ); |
3201 | return -EFAULT; |
3202 | } |
3203 | |
3204 | return 0; |
3205 | } |
3206 | |
3207 | int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg) |
3208 | { |
3209 | void *p; |
3210 | int ret = -ENOTTY; |
3211 | |
3212 | if (!capable(CAP_SYS_ADMIN)) |
3213 | return -EACCES; |
3214 | if (!dev) |
3215 | return -EOPNOTSUPP; |
3216 | if (!(dev->flags & OPAL_FL_SUPPORTED)) |
3217 | return -EOPNOTSUPP; |
3218 | |
3219 | if (cmd & IOC_IN) { |
3220 | p = memdup_user(arg, _IOC_SIZE(cmd)); |
3221 | if (IS_ERR(ptr: p)) |
3222 | return PTR_ERR(ptr: p); |
3223 | } |
3224 | |
3225 | switch (cmd) { |
3226 | case IOC_OPAL_SAVE: |
3227 | ret = opal_save(dev, lk_unlk: p); |
3228 | break; |
3229 | case IOC_OPAL_LOCK_UNLOCK: |
3230 | ret = opal_lock_unlock(dev, lk_unlk: p); |
3231 | break; |
3232 | case IOC_OPAL_TAKE_OWNERSHIP: |
3233 | ret = opal_take_ownership(dev, opal: p); |
3234 | break; |
3235 | case IOC_OPAL_ACTIVATE_LSP: |
3236 | ret = opal_activate_lsp(dev, opal_lr_act: p); |
3237 | break; |
3238 | case IOC_OPAL_SET_PW: |
3239 | ret = opal_set_new_pw(dev, opal_pw: p); |
3240 | break; |
3241 | case IOC_OPAL_ACTIVATE_USR: |
3242 | ret = opal_activate_user(dev, opal_session: p); |
3243 | break; |
3244 | case IOC_OPAL_REVERT_TPR: |
3245 | ret = opal_reverttper(dev, opal: p, psid: false); |
3246 | break; |
3247 | case IOC_OPAL_LR_SETUP: |
3248 | ret = opal_setup_locking_range(dev, opal_lrs: p); |
3249 | break; |
3250 | case IOC_OPAL_ADD_USR_TO_LR: |
3251 | ret = opal_add_user_to_lr(dev, lk_unlk: p); |
3252 | break; |
3253 | case IOC_OPAL_ENABLE_DISABLE_MBR: |
3254 | ret = opal_enable_disable_shadow_mbr(dev, opal_mbr: p); |
3255 | break; |
3256 | case IOC_OPAL_MBR_DONE: |
3257 | ret = opal_set_mbr_done(dev, mbr_done: p); |
3258 | break; |
3259 | case IOC_OPAL_WRITE_SHADOW_MBR: |
3260 | ret = opal_write_shadow_mbr(dev, info: p); |
3261 | break; |
3262 | case IOC_OPAL_ERASE_LR: |
3263 | ret = opal_erase_locking_range(dev, opal_session: p); |
3264 | break; |
3265 | case IOC_OPAL_SECURE_ERASE_LR: |
3266 | ret = opal_secure_erase_locking_range(dev, opal_session: p); |
3267 | break; |
3268 | case IOC_OPAL_PSID_REVERT_TPR: |
3269 | ret = opal_reverttper(dev, opal: p, psid: true); |
3270 | break; |
3271 | case IOC_OPAL_GENERIC_TABLE_RW: |
3272 | ret = opal_generic_read_write_table(dev, rw_tbl: p); |
3273 | break; |
3274 | case IOC_OPAL_GET_STATUS: |
3275 | ret = opal_get_status(dev, data: arg); |
3276 | break; |
3277 | case IOC_OPAL_GET_LR_STATUS: |
3278 | ret = opal_locking_range_status(dev, opal_lrst: p, data: arg); |
3279 | break; |
3280 | case IOC_OPAL_GET_GEOMETRY: |
3281 | ret = opal_get_geometry(dev, data: arg); |
3282 | break; |
3283 | case IOC_OPAL_REVERT_LSP: |
3284 | ret = opal_revertlsp(dev, rev: p); |
3285 | break; |
3286 | case IOC_OPAL_DISCOVERY: |
3287 | ret = opal_get_discv(dev, discv: p); |
3288 | break; |
3289 | |
3290 | default: |
3291 | break; |
3292 | } |
3293 | |
3294 | if (cmd & IOC_IN) |
3295 | kfree(objp: p); |
3296 | return ret; |
3297 | } |
3298 | EXPORT_SYMBOL_GPL(sed_ioctl); |
3299 | |
3300 | static int __init sed_opal_init(void) |
3301 | { |
3302 | struct key *kr; |
3303 | char init_sed_key[OPAL_KEY_MAX]; |
3304 | int keylen = OPAL_KEY_MAX - 1; |
3305 | |
3306 | kr = keyring_alloc(description: ".sed_opal" , |
3307 | GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, current_cred(), |
3308 | perm: (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW | |
3309 | KEY_USR_READ | KEY_USR_SEARCH | KEY_USR_WRITE, |
3310 | KEY_ALLOC_NOT_IN_QUOTA, |
3311 | NULL, NULL); |
3312 | if (IS_ERR(kr)) |
3313 | return PTR_ERR(kr); |
3314 | |
3315 | sed_opal_keyring = kr; |
3316 | |
3317 | if (sed_read_key(OPAL_AUTH_KEY, init_sed_key, &keylen) < 0) { |
3318 | memset(init_sed_key, '\0', sizeof(init_sed_key)); |
3319 | keylen = OPAL_KEY_MAX - 1; |
3320 | } |
3321 | |
3322 | return update_sed_opal_key(OPAL_AUTH_KEY, init_sed_key, keylen); |
3323 | } |
3324 | late_initcall(sed_opal_init); |
3325 | |