1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * caam descriptor construction helper functions
4 *
5 * Copyright 2008-2012 Freescale Semiconductor, Inc.
6 * Copyright 2019 NXP
7 */
8
9 #ifndef DESC_CONSTR_H
10 #define DESC_CONSTR_H
11
12 #include "desc.h"
13 #include "regs.h"
14
15 #define IMMEDIATE (1 << 23)
16 #define CAAM_CMD_SZ sizeof(u32)
17 #define CAAM_PTR_SZ caam_ptr_sz
18 #define CAAM_PTR_SZ_MAX sizeof(dma_addr_t)
19 #define CAAM_PTR_SZ_MIN sizeof(u32)
20 #define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE)
21 #define __DESC_JOB_IO_LEN(n) (CAAM_CMD_SZ * 5 + (n) * 3)
22 #define DESC_JOB_IO_LEN __DESC_JOB_IO_LEN(CAAM_PTR_SZ)
23 #define DESC_JOB_IO_LEN_MAX __DESC_JOB_IO_LEN(CAAM_PTR_SZ_MAX)
24 #define DESC_JOB_IO_LEN_MIN __DESC_JOB_IO_LEN(CAAM_PTR_SZ_MIN)
25
26 /*
27 * The CAAM QI hardware constructs a job descriptor which points
28 * to shared descriptor (as pointed by context_a of FQ to CAAM).
29 * When the job descriptor is executed by deco, the whole job
30 * descriptor together with shared descriptor gets loaded in
31 * deco buffer which is 64 words long (each 32-bit).
32 *
33 * The job descriptor constructed by QI hardware has layout:
34 *
35 * HEADER (1 word)
36 * Shdesc ptr (1 or 2 words)
37 * SEQ_OUT_PTR (1 word)
38 * Out ptr (1 or 2 words)
39 * Out length (1 word)
40 * SEQ_IN_PTR (1 word)
41 * In ptr (1 or 2 words)
42 * In length (1 word)
43 *
44 * The shdesc ptr is used to fetch shared descriptor contents
45 * into deco buffer.
46 *
47 * Apart from shdesc contents, the total number of words that
48 * get loaded in deco buffer are '8' or '11'. The remaining words
49 * in deco buffer can be used for storing shared descriptor.
50 */
51 #define MAX_SDLEN ((CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN_MIN) / CAAM_CMD_SZ)
52
53 #ifdef DEBUG
54 #define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\
55 &__func__[sizeof("append")]); } while (0)
56 #else
57 #define PRINT_POS
58 #endif
59
60 #define SET_OK_NO_PROP_ERRORS (IMMEDIATE | LDST_CLASS_DECO | \
61 LDST_SRCDST_WORD_DECOCTRL | \
62 (LDOFF_CHG_SHARE_OK_NO_PROP << \
63 LDST_OFFSET_SHIFT))
64 #define DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
65 LDST_SRCDST_WORD_DECOCTRL | \
66 (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
67 #define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
68 LDST_SRCDST_WORD_DECOCTRL | \
69 (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
70
71 extern bool caam_little_end;
72 extern size_t caam_ptr_sz;
73
74 /*
75 * HW fetches 4 S/G table entries at a time, irrespective of how many entries
76 * are in the table. It's SW's responsibility to make sure these accesses
77 * do not have side effects.
78 */
pad_sg_nents(int sg_nents)79 static inline int pad_sg_nents(int sg_nents)
80 {
81 return ALIGN(sg_nents, 4);
82 }
83
desc_len(u32 * const desc)84 static inline int desc_len(u32 * const desc)
85 {
86 return caam32_to_cpu(*desc) & HDR_DESCLEN_MASK;
87 }
88
desc_bytes(void * const desc)89 static inline int desc_bytes(void * const desc)
90 {
91 return desc_len(desc) * CAAM_CMD_SZ;
92 }
93
desc_end(u32 * const desc)94 static inline u32 *desc_end(u32 * const desc)
95 {
96 return desc + desc_len(desc);
97 }
98
sh_desc_pdb(u32 * const desc)99 static inline void *sh_desc_pdb(u32 * const desc)
100 {
101 return desc + 1;
102 }
103
init_desc(u32 * const desc,u32 options)104 static inline void init_desc(u32 * const desc, u32 options)
105 {
106 *desc = cpu_to_caam32((options | HDR_ONE) + 1);
107 }
108
init_sh_desc(u32 * const desc,u32 options)109 static inline void init_sh_desc(u32 * const desc, u32 options)
110 {
111 PRINT_POS;
112 init_desc(desc, CMD_SHARED_DESC_HDR | options);
113 }
114
init_sh_desc_pdb(u32 * const desc,u32 options,size_t pdb_bytes)115 static inline void init_sh_desc_pdb(u32 * const desc, u32 options,
116 size_t pdb_bytes)
117 {
118 u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
119
120 init_sh_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT) + pdb_len) |
121 options);
122 }
123
init_job_desc(u32 * const desc,u32 options)124 static inline void init_job_desc(u32 * const desc, u32 options)
125 {
126 init_desc(desc, CMD_DESC_HDR | options);
127 }
128
init_job_desc_pdb(u32 * const desc,u32 options,size_t pdb_bytes)129 static inline void init_job_desc_pdb(u32 * const desc, u32 options,
130 size_t pdb_bytes)
131 {
132 u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
133
134 init_job_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT)) | options);
135 }
136
append_ptr(u32 * const desc,dma_addr_t ptr)137 static inline void append_ptr(u32 * const desc, dma_addr_t ptr)
138 {
139 if (caam_ptr_sz == sizeof(dma_addr_t)) {
140 dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
141
142 *offset = cpu_to_caam_dma(ptr);
143 } else {
144 u32 *offset = (u32 *)desc_end(desc);
145
146 *offset = cpu_to_caam_dma(ptr);
147 }
148
149 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
150 CAAM_PTR_SZ / CAAM_CMD_SZ);
151 }
152
init_job_desc_shared(u32 * const desc,dma_addr_t ptr,int len,u32 options)153 static inline void init_job_desc_shared(u32 * const desc, dma_addr_t ptr,
154 int len, u32 options)
155 {
156 PRINT_POS;
157 init_job_desc(desc, HDR_SHARED | options |
158 (len << HDR_START_IDX_SHIFT));
159 append_ptr(desc, ptr);
160 }
161
append_data(u32 * const desc,const void * data,int len)162 static inline void append_data(u32 * const desc, const void *data, int len)
163 {
164 u32 *offset = desc_end(desc);
165
166 /* Avoid gcc warning: memcpy with data == NULL */
167 if (!IS_ENABLED(CONFIG_CRYPTO_DEV_FSL_CAAM_DEBUG) || data)
168 memcpy(offset, data, len);
169
170 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
171 (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ);
172 }
173
append_cmd(u32 * const desc,u32 command)174 static inline void append_cmd(u32 * const desc, u32 command)
175 {
176 u32 *cmd = desc_end(desc);
177
178 *cmd = cpu_to_caam32(command);
179
180 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 1);
181 }
182
183 #define append_u32 append_cmd
184
append_u64(u32 * const desc,u64 data)185 static inline void append_u64(u32 * const desc, u64 data)
186 {
187 u32 *offset = desc_end(desc);
188
189 /* Only 32-bit alignment is guaranteed in descriptor buffer */
190 if (caam_little_end) {
191 *offset = cpu_to_caam32(lower_32_bits(data));
192 *(++offset) = cpu_to_caam32(upper_32_bits(data));
193 } else {
194 *offset = cpu_to_caam32(upper_32_bits(data));
195 *(++offset) = cpu_to_caam32(lower_32_bits(data));
196 }
197
198 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 2);
199 }
200
201 /* Write command without affecting header, and return pointer to next word */
write_cmd(u32 * const desc,u32 command)202 static inline u32 *write_cmd(u32 * const desc, u32 command)
203 {
204 *desc = cpu_to_caam32(command);
205
206 return desc + 1;
207 }
208
append_cmd_ptr(u32 * const desc,dma_addr_t ptr,int len,u32 command)209 static inline void append_cmd_ptr(u32 * const desc, dma_addr_t ptr, int len,
210 u32 command)
211 {
212 append_cmd(desc, command | len);
213 append_ptr(desc, ptr);
214 }
215
216 /* Write length after pointer, rather than inside command */
append_cmd_ptr_extlen(u32 * const desc,dma_addr_t ptr,unsigned int len,u32 command)217 static inline void append_cmd_ptr_extlen(u32 * const desc, dma_addr_t ptr,
218 unsigned int len, u32 command)
219 {
220 append_cmd(desc, command);
221 if (!(command & (SQIN_RTO | SQIN_PRE)))
222 append_ptr(desc, ptr);
223 append_cmd(desc, len);
224 }
225
append_cmd_data(u32 * const desc,const void * data,int len,u32 command)226 static inline void append_cmd_data(u32 * const desc, const void *data, int len,
227 u32 command)
228 {
229 append_cmd(desc, command | IMMEDIATE | len);
230 append_data(desc, data, len);
231 }
232
233 #define APPEND_CMD_RET(cmd, op) \
234 static inline u32 *append_##cmd(u32 * const desc, u32 options) \
235 { \
236 u32 *cmd = desc_end(desc); \
237 PRINT_POS; \
238 append_cmd(desc, CMD_##op | options); \
239 return cmd; \
240 }
APPEND_CMD_RET(jump,JUMP)241 APPEND_CMD_RET(jump, JUMP)
242 APPEND_CMD_RET(move, MOVE)
243 APPEND_CMD_RET(move_len, MOVE_LEN)
244
245 static inline void set_jump_tgt_here(u32 * const desc, u32 *jump_cmd)
246 {
247 *jump_cmd = cpu_to_caam32(caam32_to_cpu(*jump_cmd) |
248 (desc_len(desc) - (jump_cmd - desc)));
249 }
250
set_move_tgt_here(u32 * const desc,u32 * move_cmd)251 static inline void set_move_tgt_here(u32 * const desc, u32 *move_cmd)
252 {
253 u32 val = caam32_to_cpu(*move_cmd);
254
255 val &= ~MOVE_OFFSET_MASK;
256 val |= (desc_len(desc) << (MOVE_OFFSET_SHIFT + 2)) & MOVE_OFFSET_MASK;
257 *move_cmd = cpu_to_caam32(val);
258 }
259
260 #define APPEND_CMD(cmd, op) \
261 static inline void append_##cmd(u32 * const desc, u32 options) \
262 { \
263 PRINT_POS; \
264 append_cmd(desc, CMD_##op | options); \
265 }
APPEND_CMD(operation,OPERATION)266 APPEND_CMD(operation, OPERATION)
267
268 #define APPEND_CMD_LEN(cmd, op) \
269 static inline void append_##cmd(u32 * const desc, unsigned int len, \
270 u32 options) \
271 { \
272 PRINT_POS; \
273 append_cmd(desc, CMD_##op | len | options); \
274 }
275
276 APPEND_CMD_LEN(seq_load, SEQ_LOAD)
277 APPEND_CMD_LEN(seq_store, SEQ_STORE)
278 APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD)
279 APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE)
280
281 #define APPEND_CMD_PTR(cmd, op) \
282 static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \
283 unsigned int len, u32 options) \
284 { \
285 PRINT_POS; \
286 append_cmd_ptr(desc, ptr, len, CMD_##op | options); \
287 }
288 APPEND_CMD_PTR(key, KEY)
289 APPEND_CMD_PTR(load, LOAD)
290 APPEND_CMD_PTR(fifo_load, FIFO_LOAD)
291 APPEND_CMD_PTR(fifo_store, FIFO_STORE)
292
293 static inline void append_store(u32 * const desc, dma_addr_t ptr,
294 unsigned int len, u32 options)
295 {
296 u32 cmd_src;
297
298 cmd_src = options & LDST_SRCDST_MASK;
299
300 append_cmd(desc, CMD_STORE | options | len);
301
302 /* The following options do not require pointer */
303 if (!(cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED ||
304 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB ||
305 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB_WE ||
306 cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED_WE))
307 append_ptr(desc, ptr);
308 }
309
310 #define APPEND_SEQ_PTR_INTLEN(cmd, op) \
311 static inline void append_seq_##cmd##_ptr_intlen(u32 * const desc, \
312 dma_addr_t ptr, \
313 unsigned int len, \
314 u32 options) \
315 { \
316 PRINT_POS; \
317 if (options & (SQIN_RTO | SQIN_PRE)) \
318 append_cmd(desc, CMD_SEQ_##op##_PTR | len | options); \
319 else \
320 append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \
321 }
322 APPEND_SEQ_PTR_INTLEN(in, IN)
323 APPEND_SEQ_PTR_INTLEN(out, OUT)
324
325 #define APPEND_CMD_PTR_TO_IMM(cmd, op) \
326 static inline void append_##cmd##_as_imm(u32 * const desc, const void *data, \
327 unsigned int len, u32 options) \
328 { \
329 PRINT_POS; \
330 append_cmd_data(desc, data, len, CMD_##op | options); \
331 }
332 APPEND_CMD_PTR_TO_IMM(load, LOAD);
333 APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD);
334
335 #define APPEND_CMD_PTR_EXTLEN(cmd, op) \
336 static inline void append_##cmd##_extlen(u32 * const desc, dma_addr_t ptr, \
337 unsigned int len, u32 options) \
338 { \
339 PRINT_POS; \
340 append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \
341 }
342 APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR)
343 APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR)
344
345 /*
346 * Determine whether to store length internally or externally depending on
347 * the size of its type
348 */
349 #define APPEND_CMD_PTR_LEN(cmd, op, type) \
350 static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \
351 type len, u32 options) \
352 { \
353 PRINT_POS; \
354 if (sizeof(type) > sizeof(u16)) \
355 append_##cmd##_extlen(desc, ptr, len, options); \
356 else \
357 append_##cmd##_intlen(desc, ptr, len, options); \
358 }
359 APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32)
360 APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32)
361
362 /*
363 * 2nd variant for commands whose specified immediate length differs
364 * from length of immediate data provided, e.g., split keys
365 */
366 #define APPEND_CMD_PTR_TO_IMM2(cmd, op) \
367 static inline void append_##cmd##_as_imm(u32 * const desc, const void *data, \
368 unsigned int data_len, \
369 unsigned int len, u32 options) \
370 { \
371 PRINT_POS; \
372 append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \
373 append_data(desc, data, data_len); \
374 }
375 APPEND_CMD_PTR_TO_IMM2(key, KEY);
376
377 #define APPEND_CMD_RAW_IMM(cmd, op, type) \
378 static inline void append_##cmd##_imm_##type(u32 * const desc, type immediate, \
379 u32 options) \
380 { \
381 PRINT_POS; \
382 if (options & LDST_LEN_MASK) \
383 append_cmd(desc, CMD_##op | IMMEDIATE | options); \
384 else \
385 append_cmd(desc, CMD_##op | IMMEDIATE | options | \
386 sizeof(type)); \
387 append_cmd(desc, immediate); \
388 }
389 APPEND_CMD_RAW_IMM(load, LOAD, u32);
390
391 /*
392 * ee - endianness
393 * size - size of immediate type in bytes
394 */
395 #define APPEND_CMD_RAW_IMM2(cmd, op, ee, size) \
396 static inline void append_##cmd##_imm_##ee##size(u32 *desc, \
397 u##size immediate, \
398 u32 options) \
399 { \
400 __##ee##size data = cpu_to_##ee##size(immediate); \
401 PRINT_POS; \
402 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(data)); \
403 append_data(desc, &data, sizeof(data)); \
404 }
405
406 APPEND_CMD_RAW_IMM2(load, LOAD, be, 32);
407
408 /*
409 * Append math command. Only the last part of destination and source need to
410 * be specified
411 */
412 #define APPEND_MATH(op, desc, dest, src_0, src_1, len) \
413 append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \
414 MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32)len);
415
416 #define append_math_add(desc, dest, src0, src1, len) \
417 APPEND_MATH(ADD, desc, dest, src0, src1, len)
418 #define append_math_sub(desc, dest, src0, src1, len) \
419 APPEND_MATH(SUB, desc, dest, src0, src1, len)
420 #define append_math_add_c(desc, dest, src0, src1, len) \
421 APPEND_MATH(ADDC, desc, dest, src0, src1, len)
422 #define append_math_sub_b(desc, dest, src0, src1, len) \
423 APPEND_MATH(SUBB, desc, dest, src0, src1, len)
424 #define append_math_and(desc, dest, src0, src1, len) \
425 APPEND_MATH(AND, desc, dest, src0, src1, len)
426 #define append_math_or(desc, dest, src0, src1, len) \
427 APPEND_MATH(OR, desc, dest, src0, src1, len)
428 #define append_math_xor(desc, dest, src0, src1, len) \
429 APPEND_MATH(XOR, desc, dest, src0, src1, len)
430 #define append_math_lshift(desc, dest, src0, src1, len) \
431 APPEND_MATH(LSHIFT, desc, dest, src0, src1, len)
432 #define append_math_rshift(desc, dest, src0, src1, len) \
433 APPEND_MATH(RSHIFT, desc, dest, src0, src1, len)
434 #define append_math_ldshift(desc, dest, src0, src1, len) \
435 APPEND_MATH(SHLD, desc, dest, src0, src1, len)
436
437 /* Exactly one source is IMM. Data is passed in as u32 value */
438 #define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \
439 do { \
440 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \
441 append_cmd(desc, data); \
442 } while (0)
443
444 #define append_math_add_imm_u32(desc, dest, src0, src1, data) \
445 APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data)
446 #define append_math_sub_imm_u32(desc, dest, src0, src1, data) \
447 APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data)
448 #define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \
449 APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data)
450 #define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \
451 APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data)
452 #define append_math_and_imm_u32(desc, dest, src0, src1, data) \
453 APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data)
454 #define append_math_or_imm_u32(desc, dest, src0, src1, data) \
455 APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data)
456 #define append_math_xor_imm_u32(desc, dest, src0, src1, data) \
457 APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data)
458 #define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \
459 APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data)
460 #define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \
461 APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data)
462
463 /* Exactly one source is IMM. Data is passed in as u64 value */
464 #define APPEND_MATH_IMM_u64(op, desc, dest, src_0, src_1, data) \
465 do { \
466 u32 upper = (data >> 16) >> 16; \
467 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ * 2 | \
468 (upper ? 0 : MATH_IFB)); \
469 if (upper) \
470 append_u64(desc, data); \
471 else \
472 append_u32(desc, lower_32_bits(data)); \
473 } while (0)
474
475 #define append_math_add_imm_u64(desc, dest, src0, src1, data) \
476 APPEND_MATH_IMM_u64(ADD, desc, dest, src0, src1, data)
477 #define append_math_sub_imm_u64(desc, dest, src0, src1, data) \
478 APPEND_MATH_IMM_u64(SUB, desc, dest, src0, src1, data)
479 #define append_math_add_c_imm_u64(desc, dest, src0, src1, data) \
480 APPEND_MATH_IMM_u64(ADDC, desc, dest, src0, src1, data)
481 #define append_math_sub_b_imm_u64(desc, dest, src0, src1, data) \
482 APPEND_MATH_IMM_u64(SUBB, desc, dest, src0, src1, data)
483 #define append_math_and_imm_u64(desc, dest, src0, src1, data) \
484 APPEND_MATH_IMM_u64(AND, desc, dest, src0, src1, data)
485 #define append_math_or_imm_u64(desc, dest, src0, src1, data) \
486 APPEND_MATH_IMM_u64(OR, desc, dest, src0, src1, data)
487 #define append_math_xor_imm_u64(desc, dest, src0, src1, data) \
488 APPEND_MATH_IMM_u64(XOR, desc, dest, src0, src1, data)
489 #define append_math_lshift_imm_u64(desc, dest, src0, src1, data) \
490 APPEND_MATH_IMM_u64(LSHIFT, desc, dest, src0, src1, data)
491 #define append_math_rshift_imm_u64(desc, dest, src0, src1, data) \
492 APPEND_MATH_IMM_u64(RSHIFT, desc, dest, src0, src1, data)
493
494 /**
495 * struct alginfo - Container for algorithm details
496 * @algtype: algorithm selector; for valid values, see documentation of the
497 * functions where it is used.
498 * @keylen: length of the provided algorithm key, in bytes
499 * @keylen_pad: padded length of the provided algorithm key, in bytes
500 * @key_dma: dma (bus) address where algorithm key resides
501 * @key_virt: virtual address where algorithm key resides
502 * @key_inline: true - key can be inlined in the descriptor; false - key is
503 * referenced by the descriptor
504 */
505 struct alginfo {
506 u32 algtype;
507 unsigned int keylen;
508 unsigned int keylen_pad;
509 dma_addr_t key_dma;
510 const void *key_virt;
511 bool key_inline;
512 };
513
514 /**
515 * desc_inline_query() - Provide indications on which data items can be inlined
516 * and which shall be referenced in a shared descriptor.
517 * @sd_base_len: Shared descriptor base length - bytes consumed by the commands,
518 * excluding the data items to be inlined (or corresponding
519 * pointer if an item is not inlined). Each cnstr_* function that
520 * generates descriptors should have a define mentioning
521 * corresponding length.
522 * @jd_len: Maximum length of the job descriptor(s) that will be used
523 * together with the shared descriptor.
524 * @data_len: Array of lengths of the data items trying to be inlined
525 * @inl_mask: 32bit mask with bit x = 1 if data item x can be inlined, 0
526 * otherwise.
527 * @count: Number of data items (size of @data_len array); must be <= 32
528 *
529 * Return: 0 if data can be inlined / referenced, negative value if not. If 0,
530 * check @inl_mask for details.
531 */
desc_inline_query(unsigned int sd_base_len,unsigned int jd_len,unsigned int * data_len,u32 * inl_mask,unsigned int count)532 static inline int desc_inline_query(unsigned int sd_base_len,
533 unsigned int jd_len, unsigned int *data_len,
534 u32 *inl_mask, unsigned int count)
535 {
536 int rem_bytes = (int)(CAAM_DESC_BYTES_MAX - sd_base_len - jd_len);
537 unsigned int i;
538
539 *inl_mask = 0;
540 for (i = 0; (i < count) && (rem_bytes > 0); i++) {
541 if (rem_bytes - (int)(data_len[i] +
542 (count - i - 1) * CAAM_PTR_SZ) >= 0) {
543 rem_bytes -= data_len[i];
544 *inl_mask |= (1 << i);
545 } else {
546 rem_bytes -= CAAM_PTR_SZ;
547 }
548 }
549
550 return (rem_bytes >= 0) ? 0 : -1;
551 }
552
553 /**
554 * append_proto_dkp - Derived Key Protocol (DKP): key -> split key
555 * @desc: pointer to buffer used for descriptor construction
556 * @adata: pointer to authentication transform definitions.
557 * keylen should be the length of initial key, while keylen_pad
558 * the length of the derived (split) key.
559 * Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1, SHA224,
560 * SHA256, SHA384, SHA512}.
561 */
append_proto_dkp(u32 * const desc,struct alginfo * adata)562 static inline void append_proto_dkp(u32 * const desc, struct alginfo *adata)
563 {
564 u32 protid;
565
566 /*
567 * Quick & dirty translation from OP_ALG_ALGSEL_{MD5, SHA*}
568 * to OP_PCLID_DKP_{MD5, SHA*}
569 */
570 protid = (adata->algtype & OP_ALG_ALGSEL_SUBMASK) |
571 (0x20 << OP_ALG_ALGSEL_SHIFT);
572
573 if (adata->key_inline) {
574 int words;
575
576 if (adata->keylen > adata->keylen_pad) {
577 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid |
578 OP_PCL_DKP_SRC_PTR |
579 OP_PCL_DKP_DST_IMM | adata->keylen);
580 append_ptr(desc, adata->key_dma);
581
582 words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) -
583 CAAM_PTR_SZ) / CAAM_CMD_SZ;
584 } else {
585 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid |
586 OP_PCL_DKP_SRC_IMM |
587 OP_PCL_DKP_DST_IMM | adata->keylen);
588 append_data(desc, adata->key_virt, adata->keylen);
589
590 words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) -
591 ALIGN(adata->keylen, CAAM_CMD_SZ)) /
592 CAAM_CMD_SZ;
593 }
594
595 /* Reserve space in descriptor buffer for the derived key */
596 if (words)
597 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + words);
598 } else {
599 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid |
600 OP_PCL_DKP_SRC_PTR | OP_PCL_DKP_DST_PTR |
601 adata->keylen);
602 append_ptr(desc, adata->key_dma);
603 }
604 }
605
606 #endif /* DESC_CONSTR_H */
607