tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * caam descriptor construction helper functions
3 *
4 * Copyright 2008-2012 Freescale Semiconductor, Inc.
5 */
6
7#include "desc.h"
8#include "regs.h"
9
10#define IMMEDIATE (1 << 23)
11#define CAAM_CMD_SZ sizeof(u32)
12#define CAAM_PTR_SZ sizeof(dma_addr_t)
13#define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE)
14#define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 5 + CAAM_PTR_SZ * 3)
15
16#ifdef DEBUG
17#define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\
18 &__func__[sizeof("append")]); } while (0)
19#else
20#define PRINT_POS
21#endif
22
23#define SET_OK_NO_PROP_ERRORS (IMMEDIATE | LDST_CLASS_DECO | \
24 LDST_SRCDST_WORD_DECOCTRL | \
25 (LDOFF_CHG_SHARE_OK_NO_PROP << \
26 LDST_OFFSET_SHIFT))
27#define DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
28 LDST_SRCDST_WORD_DECOCTRL | \
29 (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
30#define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
31 LDST_SRCDST_WORD_DECOCTRL | \
32 (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
33
34extern bool caam_little_end;
35
36static inline int desc_len(u32 *desc)
37{
38 return caam32_to_cpu(*desc) & HDR_DESCLEN_MASK;
39}
40
41static inline int desc_bytes(void *desc)
42{
43 return desc_len(desc) * CAAM_CMD_SZ;
44}
45
46static inline u32 *desc_end(u32 *desc)
47{
48 return desc + desc_len(desc);
49}
50
51static inline void *sh_desc_pdb(u32 *desc)
52{
53 return desc + 1;
54}
55
56static inline void init_desc(u32 *desc, u32 options)
57{
58 *desc = cpu_to_caam32((options | HDR_ONE) + 1);
59}
60
61static inline void init_sh_desc(u32 *desc, u32 options)
62{
63 PRINT_POS;
64 init_desc(desc, CMD_SHARED_DESC_HDR | options);
65}
66
67static inline void init_sh_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes)
68{
69 u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
70
71 init_sh_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT) + pdb_len) |
72 options);
73}
74
75static inline void init_job_desc(u32 *desc, u32 options)
76{
77 init_desc(desc, CMD_DESC_HDR | options);
78}
79
80static inline void init_job_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes)
81{
82 u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
83
84 init_job_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT)) | options);
85}
86
87static inline void append_ptr(u32 *desc, dma_addr_t ptr)
88{
89 dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
90
91 *offset = cpu_to_caam_dma(ptr);
92
93 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
94 CAAM_PTR_SZ / CAAM_CMD_SZ);
95}
96
97static inline void init_job_desc_shared(u32 *desc, dma_addr_t ptr, int len,
98 u32 options)
99{
100 PRINT_POS;
101 init_job_desc(desc, HDR_SHARED | options |
102 (len << HDR_START_IDX_SHIFT));
103 append_ptr(desc, ptr);
104}
105
106static inline void append_data(u32 *desc, void *data, int len)
107{
108 u32 *offset = desc_end(desc);
109
110 if (len) /* avoid sparse warning: memcpy with byte count of 0 */
111 memcpy(offset, data, len);
112
113 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
114 (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ);
115}
116
117static inline void append_cmd(u32 *desc, u32 command)
118{
119 u32 *cmd = desc_end(desc);
120
121 *cmd = cpu_to_caam32(command);
122
123 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 1);
124}
125
126#define append_u32 append_cmd
127
128static inline void append_u64(u32 *desc, u64 data)
129{
130 u32 *offset = desc_end(desc);
131
132 /* Only 32-bit alignment is guaranteed in descriptor buffer */
133 if (caam_little_end) {
134 *offset = cpu_to_caam32(lower_32_bits(data));
135 *(++offset) = cpu_to_caam32(upper_32_bits(data));
136 } else {
137 *offset = cpu_to_caam32(upper_32_bits(data));
138 *(++offset) = cpu_to_caam32(lower_32_bits(data));
139 }
140
141 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 2);
142}
143
144/* Write command without affecting header, and return pointer to next word */
145static inline u32 *write_cmd(u32 *desc, u32 command)
146{
147 *desc = cpu_to_caam32(command);
148
149 return desc + 1;
150}
151
152static inline void append_cmd_ptr(u32 *desc, dma_addr_t ptr, int len,
153 u32 command)
154{
155 append_cmd(desc, command | len);
156 append_ptr(desc, ptr);
157}
158
159/* Write length after pointer, rather than inside command */
160static inline void append_cmd_ptr_extlen(u32 *desc, dma_addr_t ptr,
161 unsigned int len, u32 command)
162{
163 append_cmd(desc, command);
164 if (!(command & (SQIN_RTO | SQIN_PRE)))
165 append_ptr(desc, ptr);
166 append_cmd(desc, len);
167}
168
169static inline void append_cmd_data(u32 *desc, void *data, int len,
170 u32 command)
171{
172 append_cmd(desc, command | IMMEDIATE | len);
173 append_data(desc, data, len);
174}
175
176#define APPEND_CMD_RET(cmd, op) \
177static inline u32 *append_##cmd(u32 *desc, u32 options) \
178{ \
179 u32 *cmd = desc_end(desc); \
180 PRINT_POS; \
181 append_cmd(desc, CMD_##op | options); \
182 return cmd; \
183}
184APPEND_CMD_RET(jump, JUMP)
185APPEND_CMD_RET(move, MOVE)
186
187static inline void set_jump_tgt_here(u32 *desc, u32 *jump_cmd)
188{
189 *jump_cmd = cpu_to_caam32(caam32_to_cpu(*jump_cmd) |
190 (desc_len(desc) - (jump_cmd - desc)));
191}
192
193static inline void set_move_tgt_here(u32 *desc, u32 *move_cmd)
194{
195 u32 val = caam32_to_cpu(*move_cmd);
196
197 val &= ~MOVE_OFFSET_MASK;
198 val |= (desc_len(desc) << (MOVE_OFFSET_SHIFT + 2)) & MOVE_OFFSET_MASK;
199 *move_cmd = cpu_to_caam32(val);
200}
201
202#define APPEND_CMD(cmd, op) \
203static inline void append_##cmd(u32 *desc, u32 options) \
204{ \
205 PRINT_POS; \
206 append_cmd(desc, CMD_##op | options); \
207}
208APPEND_CMD(operation, OPERATION)
209
210#define APPEND_CMD_LEN(cmd, op) \
211static inline void append_##cmd(u32 *desc, unsigned int len, u32 options) \
212{ \
213 PRINT_POS; \
214 append_cmd(desc, CMD_##op | len | options); \
215}
216
217APPEND_CMD_LEN(seq_load, SEQ_LOAD)
218APPEND_CMD_LEN(seq_store, SEQ_STORE)
219APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD)
220APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE)
221
222#define APPEND_CMD_PTR(cmd, op) \
223static inline void append_##cmd(u32 *desc, dma_addr_t ptr, unsigned int len, \
224 u32 options) \
225{ \
226 PRINT_POS; \
227 append_cmd_ptr(desc, ptr, len, CMD_##op | options); \
228}
229APPEND_CMD_PTR(key, KEY)
230APPEND_CMD_PTR(load, LOAD)
231APPEND_CMD_PTR(fifo_load, FIFO_LOAD)
232APPEND_CMD_PTR(fifo_store, FIFO_STORE)
233
234static inline void append_store(u32 *desc, dma_addr_t ptr, unsigned int len,
235 u32 options)
236{
237 u32 cmd_src;
238
239 cmd_src = options & LDST_SRCDST_MASK;
240
241 append_cmd(desc, CMD_STORE | options | len);
242
243 /* The following options do not require pointer */
244 if (!(cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED ||
245 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB ||
246 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB_WE ||
247 cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED_WE))
248 append_ptr(desc, ptr);
249}
250
251#define APPEND_SEQ_PTR_INTLEN(cmd, op) \
252static inline void append_seq_##cmd##_ptr_intlen(u32 *desc, dma_addr_t ptr, \
253 unsigned int len, \
254 u32 options) \
255{ \
256 PRINT_POS; \
257 if (options & (SQIN_RTO | SQIN_PRE)) \
258 append_cmd(desc, CMD_SEQ_##op##_PTR | len | options); \
259 else \
260 append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \
261}
262APPEND_SEQ_PTR_INTLEN(in, IN)
263APPEND_SEQ_PTR_INTLEN(out, OUT)
264
265#define APPEND_CMD_PTR_TO_IMM(cmd, op) \
266static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
267 unsigned int len, u32 options) \
268{ \
269 PRINT_POS; \
270 append_cmd_data(desc, data, len, CMD_##op | options); \
271}
272APPEND_CMD_PTR_TO_IMM(load, LOAD);
273APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD);
274
275#define APPEND_CMD_PTR_EXTLEN(cmd, op) \
276static inline void append_##cmd##_extlen(u32 *desc, dma_addr_t ptr, \
277 unsigned int len, u32 options) \
278{ \
279 PRINT_POS; \
280 append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \
281}
282APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR)
283APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR)
284
285/*
286 * Determine whether to store length internally or externally depending on
287 * the size of its type
288 */
289#define APPEND_CMD_PTR_LEN(cmd, op, type) \
290static inline void append_##cmd(u32 *desc, dma_addr_t ptr, \
291 type len, u32 options) \
292{ \
293 PRINT_POS; \
294 if (sizeof(type) > sizeof(u16)) \
295 append_##cmd##_extlen(desc, ptr, len, options); \
296 else \
297 append_##cmd##_intlen(desc, ptr, len, options); \
298}
299APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32)
300APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32)
301
302/*
303 * 2nd variant for commands whose specified immediate length differs
304 * from length of immediate data provided, e.g., split keys
305 */
306#define APPEND_CMD_PTR_TO_IMM2(cmd, op) \
307static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
308 unsigned int data_len, \
309 unsigned int len, u32 options) \
310{ \
311 PRINT_POS; \
312 append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \
313 append_data(desc, data, data_len); \
314}
315APPEND_CMD_PTR_TO_IMM2(key, KEY);
316
317#define APPEND_CMD_RAW_IMM(cmd, op, type) \
318static inline void append_##cmd##_imm_##type(u32 *desc, type immediate, \
319 u32 options) \
320{ \
321 PRINT_POS; \
322 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(type)); \
323 append_cmd(desc, immediate); \
324}
325APPEND_CMD_RAW_IMM(load, LOAD, u32);
326
327/*
328 * Append math command. Only the last part of destination and source need to
329 * be specified
330 */
331#define APPEND_MATH(op, desc, dest, src_0, src_1, len) \
332append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \
333 MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32)len);
334
335#define append_math_add(desc, dest, src0, src1, len) \
336 APPEND_MATH(ADD, desc, dest, src0, src1, len)
337#define append_math_sub(desc, dest, src0, src1, len) \
338 APPEND_MATH(SUB, desc, dest, src0, src1, len)
339#define append_math_add_c(desc, dest, src0, src1, len) \
340 APPEND_MATH(ADDC, desc, dest, src0, src1, len)
341#define append_math_sub_b(desc, dest, src0, src1, len) \
342 APPEND_MATH(SUBB, desc, dest, src0, src1, len)
343#define append_math_and(desc, dest, src0, src1, len) \
344 APPEND_MATH(AND, desc, dest, src0, src1, len)
345#define append_math_or(desc, dest, src0, src1, len) \
346 APPEND_MATH(OR, desc, dest, src0, src1, len)
347#define append_math_xor(desc, dest, src0, src1, len) \
348 APPEND_MATH(XOR, desc, dest, src0, src1, len)
349#define append_math_lshift(desc, dest, src0, src1, len) \
350 APPEND_MATH(LSHIFT, desc, dest, src0, src1, len)
351#define append_math_rshift(desc, dest, src0, src1, len) \
352 APPEND_MATH(RSHIFT, desc, dest, src0, src1, len)
353#define append_math_ldshift(desc, dest, src0, src1, len) \
354 APPEND_MATH(SHLD, desc, dest, src0, src1, len)
355
356/* Exactly one source is IMM. Data is passed in as u32 value */
357#define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \
358do { \
359 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \
360 append_cmd(desc, data); \
361} while (0)
362
363#define append_math_add_imm_u32(desc, dest, src0, src1, data) \
364 APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data)
365#define append_math_sub_imm_u32(desc, dest, src0, src1, data) \
366 APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data)
367#define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \
368 APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data)
369#define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \
370 APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data)
371#define append_math_and_imm_u32(desc, dest, src0, src1, data) \
372 APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data)
373#define append_math_or_imm_u32(desc, dest, src0, src1, data) \
374 APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data)
375#define append_math_xor_imm_u32(desc, dest, src0, src1, data) \
376 APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data)
377#define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \
378 APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data)
379#define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \
380 APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data)
381
382/* Exactly one source is IMM. Data is passed in as u64 value */
383#define APPEND_MATH_IMM_u64(op, desc, dest, src_0, src_1, data) \
384do { \
385 u32 upper = (data >> 16) >> 16; \
386 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ * 2 | \
387 (upper ? 0 : MATH_IFB)); \
388 if (upper) \
389 append_u64(desc, data); \
390 else \
391 append_u32(desc, lower_32_bits(data)); \
392} while (0)
393
394#define append_math_add_imm_u64(desc, dest, src0, src1, data) \
395 APPEND_MATH_IMM_u64(ADD, desc, dest, src0, src1, data)
396#define append_math_sub_imm_u64(desc, dest, src0, src1, data) \
397 APPEND_MATH_IMM_u64(SUB, desc, dest, src0, src1, data)
398#define append_math_add_c_imm_u64(desc, dest, src0, src1, data) \
399 APPEND_MATH_IMM_u64(ADDC, desc, dest, src0, src1, data)
400#define append_math_sub_b_imm_u64(desc, dest, src0, src1, data) \
401 APPEND_MATH_IMM_u64(SUBB, desc, dest, src0, src1, data)
402#define append_math_and_imm_u64(desc, dest, src0, src1, data) \
403 APPEND_MATH_IMM_u64(AND, desc, dest, src0, src1, data)
404#define append_math_or_imm_u64(desc, dest, src0, src1, data) \
405 APPEND_MATH_IMM_u64(OR, desc, dest, src0, src1, data)
406#define append_math_xor_imm_u64(desc, dest, src0, src1, data) \
407 APPEND_MATH_IMM_u64(XOR, desc, dest, src0, src1, data)
408#define append_math_lshift_imm_u64(desc, dest, src0, src1, data) \
409 APPEND_MATH_IMM_u64(LSHIFT, desc, dest, src0, src1, data)
410#define append_math_rshift_imm_u64(desc, dest, src0, src1, data) \
411 APPEND_MATH_IMM_u64(RSHIFT, desc, dest, src0, src1, data)