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 if (len) /* avoid sparse warning: memcpy with byte count of 0 */
167 memcpy(offset, data, len);
168
169 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
170 (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ);
171 }
172
append_cmd(u32 * const desc,u32 command)173 static inline void append_cmd(u32 * const desc, u32 command)
174 {
175 u32 *cmd = desc_end(desc);
176
177 *cmd = cpu_to_caam32(command);
178
179 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 1);
180 }
181
182 #define append_u32 append_cmd
183
append_u64(u32 * const desc,u64 data)184 static inline void append_u64(u32 * const desc, u64 data)
185 {
186 u32 *offset = desc_end(desc);
187
188 /* Only 32-bit alignment is guaranteed in descriptor buffer */
189 if (caam_little_end) {
190 *offset = cpu_to_caam32(lower_32_bits(data));
191 *(++offset) = cpu_to_caam32(upper_32_bits(data));
192 } else {
193 *offset = cpu_to_caam32(upper_32_bits(data));
194 *(++offset) = cpu_to_caam32(lower_32_bits(data));
195 }
196
197 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 2);
198 }
199
200 /* Write command without affecting header, and return pointer to next word */
write_cmd(u32 * const desc,u32 command)201 static inline u32 *write_cmd(u32 * const desc, u32 command)
202 {
203 *desc = cpu_to_caam32(command);
204
205 return desc + 1;
206 }
207
append_cmd_ptr(u32 * const desc,dma_addr_t ptr,int len,u32 command)208 static inline void append_cmd_ptr(u32 * const desc, dma_addr_t ptr, int len,
209 u32 command)
210 {
211 append_cmd(desc, command | len);
212 append_ptr(desc, ptr);
213 }
214
215 /* Write length after pointer, rather than inside command */
append_cmd_ptr_extlen(u32 * const desc,dma_addr_t ptr,unsigned int len,u32 command)216 static inline void append_cmd_ptr_extlen(u32 * const desc, dma_addr_t ptr,
217 unsigned int len, u32 command)
218 {
219 append_cmd(desc, command);
220 if (!(command & (SQIN_RTO | SQIN_PRE)))
221 append_ptr(desc, ptr);
222 append_cmd(desc, len);
223 }
224
append_cmd_data(u32 * const desc,const void * data,int len,u32 command)225 static inline void append_cmd_data(u32 * const desc, const void *data, int len,
226 u32 command)
227 {
228 append_cmd(desc, command | IMMEDIATE | len);
229 append_data(desc, data, len);
230 }
231
232 #define APPEND_CMD_RET(cmd, op) \
233 static inline u32 *append_##cmd(u32 * const desc, u32 options) \
234 { \
235 u32 *cmd = desc_end(desc); \
236 PRINT_POS; \
237 append_cmd(desc, CMD_##op | options); \
238 return cmd; \
239 }
APPEND_CMD_RET(jump,JUMP)240 APPEND_CMD_RET(jump, JUMP)
241 APPEND_CMD_RET(move, MOVE)
242 APPEND_CMD_RET(move_len, MOVE_LEN)
243
244 static inline void set_jump_tgt_here(u32 * const desc, u32 *jump_cmd)
245 {
246 *jump_cmd = cpu_to_caam32(caam32_to_cpu(*jump_cmd) |
247 (desc_len(desc) - (jump_cmd - desc)));
248 }
249
set_move_tgt_here(u32 * const desc,u32 * move_cmd)250 static inline void set_move_tgt_here(u32 * const desc, u32 *move_cmd)
251 {
252 u32 val = caam32_to_cpu(*move_cmd);
253
254 val &= ~MOVE_OFFSET_MASK;
255 val |= (desc_len(desc) << (MOVE_OFFSET_SHIFT + 2)) & MOVE_OFFSET_MASK;
256 *move_cmd = cpu_to_caam32(val);
257 }
258
259 #define APPEND_CMD(cmd, op) \
260 static inline void append_##cmd(u32 * const desc, u32 options) \
261 { \
262 PRINT_POS; \
263 append_cmd(desc, CMD_##op | options); \
264 }
APPEND_CMD(operation,OPERATION)265 APPEND_CMD(operation, OPERATION)
266
267 #define APPEND_CMD_LEN(cmd, op) \
268 static inline void append_##cmd(u32 * const desc, unsigned int len, \
269 u32 options) \
270 { \
271 PRINT_POS; \
272 append_cmd(desc, CMD_##op | len | options); \
273 }
274
275 APPEND_CMD_LEN(seq_load, SEQ_LOAD)
276 APPEND_CMD_LEN(seq_store, SEQ_STORE)
277 APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD)
278 APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE)
279
280 #define APPEND_CMD_PTR(cmd, op) \
281 static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \
282 unsigned int len, u32 options) \
283 { \
284 PRINT_POS; \
285 append_cmd_ptr(desc, ptr, len, CMD_##op | options); \
286 }
287 APPEND_CMD_PTR(key, KEY)
288 APPEND_CMD_PTR(load, LOAD)
289 APPEND_CMD_PTR(fifo_load, FIFO_LOAD)
290 APPEND_CMD_PTR(fifo_store, FIFO_STORE)
291
292 static inline void append_store(u32 * const desc, dma_addr_t ptr,
293 unsigned int len, u32 options)
294 {
295 u32 cmd_src;
296
297 cmd_src = options & LDST_SRCDST_MASK;
298
299 append_cmd(desc, CMD_STORE | options | len);
300
301 /* The following options do not require pointer */
302 if (!(cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED ||
303 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB ||
304 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB_WE ||
305 cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED_WE))
306 append_ptr(desc, ptr);
307 }
308
309 #define APPEND_SEQ_PTR_INTLEN(cmd, op) \
310 static inline void append_seq_##cmd##_ptr_intlen(u32 * const desc, \
311 dma_addr_t ptr, \
312 unsigned int len, \
313 u32 options) \
314 { \
315 PRINT_POS; \
316 if (options & (SQIN_RTO | SQIN_PRE)) \
317 append_cmd(desc, CMD_SEQ_##op##_PTR | len | options); \
318 else \
319 append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \
320 }
321 APPEND_SEQ_PTR_INTLEN(in, IN)
322 APPEND_SEQ_PTR_INTLEN(out, OUT)
323
324 #define APPEND_CMD_PTR_TO_IMM(cmd, op) \
325 static inline void append_##cmd##_as_imm(u32 * const desc, const void *data, \
326 unsigned int len, u32 options) \
327 { \
328 PRINT_POS; \
329 append_cmd_data(desc, data, len, CMD_##op | options); \
330 }
331 APPEND_CMD_PTR_TO_IMM(load, LOAD);
332 APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD);
333
334 #define APPEND_CMD_PTR_EXTLEN(cmd, op) \
335 static inline void append_##cmd##_extlen(u32 * const desc, dma_addr_t ptr, \
336 unsigned int len, u32 options) \
337 { \
338 PRINT_POS; \
339 append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \
340 }
341 APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR)
342 APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR)
343
344 /*
345 * Determine whether to store length internally or externally depending on
346 * the size of its type
347 */
348 #define APPEND_CMD_PTR_LEN(cmd, op, type) \
349 static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \
350 type len, u32 options) \
351 { \
352 PRINT_POS; \
353 if (sizeof(type) > sizeof(u16)) \
354 append_##cmd##_extlen(desc, ptr, len, options); \
355 else \
356 append_##cmd##_intlen(desc, ptr, len, options); \
357 }
358 APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32)
359 APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32)
360
361 /*
362 * 2nd variant for commands whose specified immediate length differs
363 * from length of immediate data provided, e.g., split keys
364 */
365 #define APPEND_CMD_PTR_TO_IMM2(cmd, op) \
366 static inline void append_##cmd##_as_imm(u32 * const desc, const void *data, \
367 unsigned int data_len, \
368 unsigned int len, u32 options) \
369 { \
370 PRINT_POS; \
371 append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \
372 append_data(desc, data, data_len); \
373 }
374 APPEND_CMD_PTR_TO_IMM2(key, KEY);
375
376 #define APPEND_CMD_RAW_IMM(cmd, op, type) \
377 static inline void append_##cmd##_imm_##type(u32 * const desc, type immediate, \
378 u32 options) \
379 { \
380 PRINT_POS; \
381 if (options & LDST_LEN_MASK) \
382 append_cmd(desc, CMD_##op | IMMEDIATE | options); \
383 else \
384 append_cmd(desc, CMD_##op | IMMEDIATE | options | \
385 sizeof(type)); \
386 append_cmd(desc, immediate); \
387 }
388 APPEND_CMD_RAW_IMM(load, LOAD, u32);
389
390 /*
391 * ee - endianness
392 * size - size of immediate type in bytes
393 */
394 #define APPEND_CMD_RAW_IMM2(cmd, op, ee, size) \
395 static inline void append_##cmd##_imm_##ee##size(u32 *desc, \
396 u##size immediate, \
397 u32 options) \
398 { \
399 __##ee##size data = cpu_to_##ee##size(immediate); \
400 PRINT_POS; \
401 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(data)); \
402 append_data(desc, &data, sizeof(data)); \
403 }
404
405 APPEND_CMD_RAW_IMM2(load, LOAD, be, 32);
406
407 /*
408 * Append math command. Only the last part of destination and source need to
409 * be specified
410 */
411 #define APPEND_MATH(op, desc, dest, src_0, src_1, len) \
412 append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \
413 MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32)len);
414
415 #define append_math_add(desc, dest, src0, src1, len) \
416 APPEND_MATH(ADD, desc, dest, src0, src1, len)
417 #define append_math_sub(desc, dest, src0, src1, len) \
418 APPEND_MATH(SUB, desc, dest, src0, src1, len)
419 #define append_math_add_c(desc, dest, src0, src1, len) \
420 APPEND_MATH(ADDC, desc, dest, src0, src1, len)
421 #define append_math_sub_b(desc, dest, src0, src1, len) \
422 APPEND_MATH(SUBB, desc, dest, src0, src1, len)
423 #define append_math_and(desc, dest, src0, src1, len) \
424 APPEND_MATH(AND, desc, dest, src0, src1, len)
425 #define append_math_or(desc, dest, src0, src1, len) \
426 APPEND_MATH(OR, desc, dest, src0, src1, len)
427 #define append_math_xor(desc, dest, src0, src1, len) \
428 APPEND_MATH(XOR, desc, dest, src0, src1, len)
429 #define append_math_lshift(desc, dest, src0, src1, len) \
430 APPEND_MATH(LSHIFT, desc, dest, src0, src1, len)
431 #define append_math_rshift(desc, dest, src0, src1, len) \
432 APPEND_MATH(RSHIFT, desc, dest, src0, src1, len)
433 #define append_math_ldshift(desc, dest, src0, src1, len) \
434 APPEND_MATH(SHLD, desc, dest, src0, src1, len)
435
436 /* Exactly one source is IMM. Data is passed in as u32 value */
437 #define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \
438 do { \
439 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \
440 append_cmd(desc, data); \
441 } while (0)
442
443 #define append_math_add_imm_u32(desc, dest, src0, src1, data) \
444 APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data)
445 #define append_math_sub_imm_u32(desc, dest, src0, src1, data) \
446 APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data)
447 #define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \
448 APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data)
449 #define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \
450 APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data)
451 #define append_math_and_imm_u32(desc, dest, src0, src1, data) \
452 APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data)
453 #define append_math_or_imm_u32(desc, dest, src0, src1, data) \
454 APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data)
455 #define append_math_xor_imm_u32(desc, dest, src0, src1, data) \
456 APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data)
457 #define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \
458 APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data)
459 #define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \
460 APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data)
461
462 /* Exactly one source is IMM. Data is passed in as u64 value */
463 #define APPEND_MATH_IMM_u64(op, desc, dest, src_0, src_1, data) \
464 do { \
465 u32 upper = (data >> 16) >> 16; \
466 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ * 2 | \
467 (upper ? 0 : MATH_IFB)); \
468 if (upper) \
469 append_u64(desc, data); \
470 else \
471 append_u32(desc, lower_32_bits(data)); \
472 } while (0)
473
474 #define append_math_add_imm_u64(desc, dest, src0, src1, data) \
475 APPEND_MATH_IMM_u64(ADD, desc, dest, src0, src1, data)
476 #define append_math_sub_imm_u64(desc, dest, src0, src1, data) \
477 APPEND_MATH_IMM_u64(SUB, desc, dest, src0, src1, data)
478 #define append_math_add_c_imm_u64(desc, dest, src0, src1, data) \
479 APPEND_MATH_IMM_u64(ADDC, desc, dest, src0, src1, data)
480 #define append_math_sub_b_imm_u64(desc, dest, src0, src1, data) \
481 APPEND_MATH_IMM_u64(SUBB, desc, dest, src0, src1, data)
482 #define append_math_and_imm_u64(desc, dest, src0, src1, data) \
483 APPEND_MATH_IMM_u64(AND, desc, dest, src0, src1, data)
484 #define append_math_or_imm_u64(desc, dest, src0, src1, data) \
485 APPEND_MATH_IMM_u64(OR, desc, dest, src0, src1, data)
486 #define append_math_xor_imm_u64(desc, dest, src0, src1, data) \
487 APPEND_MATH_IMM_u64(XOR, desc, dest, src0, src1, data)
488 #define append_math_lshift_imm_u64(desc, dest, src0, src1, data) \
489 APPEND_MATH_IMM_u64(LSHIFT, desc, dest, src0, src1, data)
490 #define append_math_rshift_imm_u64(desc, dest, src0, src1, data) \
491 APPEND_MATH_IMM_u64(RSHIFT, desc, dest, src0, src1, data)
492
493 /**
494 * struct alginfo - Container for algorithm details
495 * @algtype: algorithm selector; for valid values, see documentation of the
496 * functions where it is used.
497 * @keylen: length of the provided algorithm key, in bytes
498 * @keylen_pad: padded length of the provided algorithm key, in bytes
499 * @key_dma: dma (bus) address where algorithm key resides
500 * @key_virt: virtual address where algorithm key resides
501 * @key_inline: true - key can be inlined in the descriptor; false - key is
502 * referenced by the descriptor
503 */
504 struct alginfo {
505 u32 algtype;
506 unsigned int keylen;
507 unsigned int keylen_pad;
508 dma_addr_t key_dma;
509 const void *key_virt;
510 bool key_inline;
511 };
512
513 /**
514 * desc_inline_query() - Provide indications on which data items can be inlined
515 * and which shall be referenced in a shared descriptor.
516 * @sd_base_len: Shared descriptor base length - bytes consumed by the commands,
517 * excluding the data items to be inlined (or corresponding
518 * pointer if an item is not inlined). Each cnstr_* function that
519 * generates descriptors should have a define mentioning
520 * corresponding length.
521 * @jd_len: Maximum length of the job descriptor(s) that will be used
522 * together with the shared descriptor.
523 * @data_len: Array of lengths of the data items trying to be inlined
524 * @inl_mask: 32bit mask with bit x = 1 if data item x can be inlined, 0
525 * otherwise.
526 * @count: Number of data items (size of @data_len array); must be <= 32
527 *
528 * Return: 0 if data can be inlined / referenced, negative value if not. If 0,
529 * check @inl_mask for details.
530 */
desc_inline_query(unsigned int sd_base_len,unsigned int jd_len,unsigned int * data_len,u32 * inl_mask,unsigned int count)531 static inline int desc_inline_query(unsigned int sd_base_len,
532 unsigned int jd_len, unsigned int *data_len,
533 u32 *inl_mask, unsigned int count)
534 {
535 int rem_bytes = (int)(CAAM_DESC_BYTES_MAX - sd_base_len - jd_len);
536 unsigned int i;
537
538 *inl_mask = 0;
539 for (i = 0; (i < count) && (rem_bytes > 0); i++) {
540 if (rem_bytes - (int)(data_len[i] +
541 (count - i - 1) * CAAM_PTR_SZ) >= 0) {
542 rem_bytes -= data_len[i];
543 *inl_mask |= (1 << i);
544 } else {
545 rem_bytes -= CAAM_PTR_SZ;
546 }
547 }
548
549 return (rem_bytes >= 0) ? 0 : -1;
550 }
551
552 /**
553 * append_proto_dkp - Derived Key Protocol (DKP): key -> split key
554 * @desc: pointer to buffer used for descriptor construction
555 * @adata: pointer to authentication transform definitions.
556 * keylen should be the length of initial key, while keylen_pad
557 * the length of the derived (split) key.
558 * Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1, SHA224,
559 * SHA256, SHA384, SHA512}.
560 */
append_proto_dkp(u32 * const desc,struct alginfo * adata)561 static inline void append_proto_dkp(u32 * const desc, struct alginfo *adata)
562 {
563 u32 protid;
564
565 /*
566 * Quick & dirty translation from OP_ALG_ALGSEL_{MD5, SHA*}
567 * to OP_PCLID_DKP_{MD5, SHA*}
568 */
569 protid = (adata->algtype & OP_ALG_ALGSEL_SUBMASK) |
570 (0x20 << OP_ALG_ALGSEL_SHIFT);
571
572 if (adata->key_inline) {
573 int words;
574
575 if (adata->keylen > adata->keylen_pad) {
576 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid |
577 OP_PCL_DKP_SRC_PTR |
578 OP_PCL_DKP_DST_IMM | adata->keylen);
579 append_ptr(desc, adata->key_dma);
580
581 words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) -
582 CAAM_PTR_SZ) / CAAM_CMD_SZ;
583 } else {
584 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid |
585 OP_PCL_DKP_SRC_IMM |
586 OP_PCL_DKP_DST_IMM | adata->keylen);
587 append_data(desc, adata->key_virt, adata->keylen);
588
589 words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) -
590 ALIGN(adata->keylen, CAAM_CMD_SZ)) /
591 CAAM_CMD_SZ;
592 }
593
594 /* Reserve space in descriptor buffer for the derived key */
595 if (words)
596 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + words);
597 } else {
598 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid |
599 OP_PCL_DKP_SRC_PTR | OP_PCL_DKP_DST_PTR |
600 adata->keylen);
601 append_ptr(desc, adata->key_dma);
602 }
603 }
604
605 #endif /* DESC_CONSTR_H */
606