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 | */ |
79 | static inline int pad_sg_nents(int sg_nents) |
80 | { |
81 | return ALIGN(sg_nents, 4); |
82 | } |
83 | |
84 | static inline int desc_len(u32 * const desc) |
85 | { |
86 | return caam32_to_cpu(val: *desc) & HDR_DESCLEN_MASK; |
87 | } |
88 | |
89 | static inline int desc_bytes(void * const desc) |
90 | { |
91 | return desc_len(desc) * CAAM_CMD_SZ; |
92 | } |
93 | |
94 | static inline u32 *desc_end(u32 * const desc) |
95 | { |
96 | return desc + desc_len(desc); |
97 | } |
98 | |
99 | static inline void *sh_desc_pdb(u32 * const desc) |
100 | { |
101 | return desc + 1; |
102 | } |
103 | |
104 | static inline void init_desc(u32 * const desc, u32 options) |
105 | { |
106 | *desc = cpu_to_caam32(val: (options | HDR_ONE) + 1); |
107 | } |
108 | |
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 | |
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, options: (((pdb_len + 1) << HDR_START_IDX_SHIFT) + pdb_len) | |
121 | options); |
122 | } |
123 | |
124 | static inline void init_job_desc(u32 * const desc, u32 options) |
125 | { |
126 | init_desc(desc, CMD_DESC_HDR | options); |
127 | } |
128 | |
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, options: (((pdb_len + 1) << HDR_START_IDX_SHIFT)) | options); |
135 | } |
136 | |
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(value: ptr); |
143 | } else { |
144 | u32 *offset = (u32 *)desc_end(desc); |
145 | |
146 | *offset = cpu_to_caam_dma(value: ptr); |
147 | } |
148 | |
149 | (*desc) = cpu_to_caam32(val: caam32_to_cpu(val: *desc) + |
150 | CAAM_PTR_SZ / CAAM_CMD_SZ); |
151 | } |
152 | |
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 | |
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(val: caam32_to_cpu(val: *desc) + |
171 | (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ); |
172 | } |
173 | |
174 | static inline void append_cmd(u32 * const desc, u32 command) |
175 | { |
176 | u32 *cmd = desc_end(desc); |
177 | |
178 | *cmd = cpu_to_caam32(val: command); |
179 | |
180 | (*desc) = cpu_to_caam32(val: caam32_to_cpu(val: *desc) + 1); |
181 | } |
182 | |
183 | #define append_u32 append_cmd |
184 | |
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(val: caam32_to_cpu(val: *desc) + 2); |
199 | } |
200 | |
201 | /* Write command without affecting header, and return pointer to next word */ |
202 | static inline u32 *write_cmd(u32 * const desc, u32 command) |
203 | { |
204 | *desc = cpu_to_caam32(val: command); |
205 | |
206 | return desc + 1; |
207 | } |
208 | |
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: command | len); |
213 | append_ptr(desc, ptr); |
214 | } |
215 | |
216 | /* Write length after pointer, rather than inside 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, command: len); |
224 | } |
225 | |
226 | static inline void append_cmd_data(u32 * const desc, const void *data, int len, |
227 | u32 command) |
228 | { |
229 | append_cmd(desc, command: 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 | } |
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(val: caam32_to_cpu(val: *jump_cmd) | |
248 | (desc_len(desc) - (jump_cmd - desc))); |
249 | } |
250 | |
251 | static inline void set_move_tgt_here(u32 * const desc, u32 *move_cmd) |
252 | { |
253 | u32 val = caam32_to_cpu(val: *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 | } |
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 | */ |
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 | */ |
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, ptr: 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, data: adata->key_virt, len: 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(val: caam32_to_cpu(val: *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, ptr: adata->key_dma); |
603 | } |
604 | } |
605 | |
606 | #endif /* DESC_CONSTR_H */ |
607 | |