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
9#define IMMEDIATE (1 << 23)
10#define CAAM_CMD_SZ sizeof(u32)
11#define CAAM_PTR_SZ sizeof(dma_addr_t)
12#define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE)
13
14#ifdef DEBUG
15#define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\
16 &__func__[sizeof("append")]); } while (0)
17#else
18#define PRINT_POS
19#endif
20
21#define SET_OK_NO_PROP_ERRORS (IMMEDIATE | LDST_CLASS_DECO | \
22 LDST_SRCDST_WORD_DECOCTRL | \
23 (LDOFF_CHG_SHARE_OK_NO_PROP << \
24 LDST_OFFSET_SHIFT))
25#define DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
26 LDST_SRCDST_WORD_DECOCTRL | \
27 (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
28#define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
29 LDST_SRCDST_WORD_DECOCTRL | \
30 (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
31
32static inline int desc_len(u32 *desc)
33{
34 return *desc & HDR_DESCLEN_MASK;
35}
36
37static inline int desc_bytes(void *desc)
38{
39 return desc_len(desc) * CAAM_CMD_SZ;
40}
41
42static inline u32 *desc_end(u32 *desc)
43{
44 return desc + desc_len(desc);
45}
46
47static inline void *sh_desc_pdb(u32 *desc)
48{
49 return desc + 1;
50}
51
52static inline void init_desc(u32 *desc, u32 options)
53{
54 *desc = (options | HDR_ONE) + 1;
55}
56
57static inline void init_sh_desc(u32 *desc, u32 options)
58{
59 PRINT_POS;
60 init_desc(desc, CMD_SHARED_DESC_HDR | options);
61}
62
63static inline void init_sh_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes)
64{
65 u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
66
67 init_sh_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT) + pdb_len) |
68 options);
69}
70
71static inline void init_job_desc(u32 *desc, u32 options)
72{
73 init_desc(desc, CMD_DESC_HDR | options);
74}
75
76static inline void append_ptr(u32 *desc, dma_addr_t ptr)
77{
78 dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
79
80 *offset = ptr;
81
82 (*desc) += CAAM_PTR_SZ / CAAM_CMD_SZ;
83}
84
85static inline void init_job_desc_shared(u32 *desc, dma_addr_t ptr, int len,
86 u32 options)
87{
88 PRINT_POS;
89 init_job_desc(desc, HDR_SHARED | options |
90 (len << HDR_START_IDX_SHIFT));
91 append_ptr(desc, ptr);
92}
93
94static inline void append_data(u32 *desc, void *data, int len)
95{
96 u32 *offset = desc_end(desc);
97
98 if (len) /* avoid sparse warning: memcpy with byte count of 0 */
99 memcpy(offset, data, len);
100
101 (*desc) += (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
102}
103
104static inline void append_cmd(u32 *desc, u32 command)
105{
106 u32 *cmd = desc_end(desc);
107
108 *cmd = command;
109
110 (*desc)++;
111}
112
113static inline void append_cmd_ptr(u32 *desc, dma_addr_t ptr, int len,
114 u32 command)
115{
116 append_cmd(desc, command | len);
117 append_ptr(desc, ptr);
118}
119
120/* Write length after pointer, rather than inside command */
121static inline void append_cmd_ptr_extlen(u32 *desc, dma_addr_t ptr,
122 unsigned int len, u32 command)
123{
124 append_cmd(desc, command);
125 append_ptr(desc, ptr);
126 append_cmd(desc, len);
127}
128
129static inline void append_cmd_data(u32 *desc, void *data, int len,
130 u32 command)
131{
132 append_cmd(desc, command | IMMEDIATE | len);
133 append_data(desc, data, len);
134}
135
136static inline u32 *append_jump(u32 *desc, u32 options)
137{
138 u32 *cmd = desc_end(desc);
139
140 PRINT_POS;
141 append_cmd(desc, CMD_JUMP | options);
142
143 return cmd;
144}
145
146static inline void set_jump_tgt_here(u32 *desc, u32 *jump_cmd)
147{
148 *jump_cmd = *jump_cmd | (desc_len(desc) - (jump_cmd - desc));
149}
150
151#define APPEND_CMD(cmd, op) \
152static inline void append_##cmd(u32 *desc, u32 options) \
153{ \
154 PRINT_POS; \
155 append_cmd(desc, CMD_##op | options); \
156}
157APPEND_CMD(operation, OPERATION)
158APPEND_CMD(move, MOVE)
159
160#define APPEND_CMD_LEN(cmd, op) \
161static inline void append_##cmd(u32 *desc, unsigned int len, u32 options) \
162{ \
163 PRINT_POS; \
164 append_cmd(desc, CMD_##op | len | options); \
165}
166APPEND_CMD_LEN(seq_store, SEQ_STORE)
167APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD)
168APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE)
169
170#define APPEND_CMD_PTR(cmd, op) \
171static inline void append_##cmd(u32 *desc, dma_addr_t ptr, unsigned int len, \
172 u32 options) \
173{ \
174 PRINT_POS; \
175 append_cmd_ptr(desc, ptr, len, CMD_##op | options); \
176}
177APPEND_CMD_PTR(key, KEY)
178APPEND_CMD_PTR(load, LOAD)
179APPEND_CMD_PTR(store, STORE)
180APPEND_CMD_PTR(fifo_load, FIFO_LOAD)
181APPEND_CMD_PTR(fifo_store, FIFO_STORE)
182
183#define APPEND_SEQ_PTR_INTLEN(cmd, op) \
184static inline void append_seq_##cmd##_ptr_intlen(u32 *desc, dma_addr_t ptr, \
185 unsigned int len, \
186 u32 options) \
187{ \
188 PRINT_POS; \
189 append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \
190}
191APPEND_SEQ_PTR_INTLEN(in, IN)
192APPEND_SEQ_PTR_INTLEN(out, OUT)
193
194#define APPEND_CMD_PTR_TO_IMM(cmd, op) \
195static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
196 unsigned int len, u32 options) \
197{ \
198 PRINT_POS; \
199 append_cmd_data(desc, data, len, CMD_##op | options); \
200}
201APPEND_CMD_PTR_TO_IMM(load, LOAD);
202APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD);
203
204#define APPEND_CMD_PTR_EXTLEN(cmd, op) \
205static inline void append_##cmd##_extlen(u32 *desc, dma_addr_t ptr, \
206 unsigned int len, u32 options) \
207{ \
208 PRINT_POS; \
209 append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \
210}
211APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR)
212APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR)
213
214/*
215 * Determine whether to store length internally or externally depending on
216 * the size of its type
217 */
218#define APPEND_CMD_PTR_LEN(cmd, op, type) \
219static inline void append_##cmd(u32 *desc, dma_addr_t ptr, \
220 type len, u32 options) \
221{ \
222 PRINT_POS; \
223 if (sizeof(type) > sizeof(u16)) \
224 append_##cmd##_extlen(desc, ptr, len, options); \
225 else \
226 append_##cmd##_intlen(desc, ptr, len, options); \
227}
228APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32)
229APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32)
230
231/*
232 * 2nd variant for commands whose specified immediate length differs
233 * from length of immediate data provided, e.g., split keys
234 */
235#define APPEND_CMD_PTR_TO_IMM2(cmd, op) \
236static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
237 unsigned int data_len, \
238 unsigned int len, u32 options) \
239{ \
240 PRINT_POS; \
241 append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \
242 append_data(desc, data, data_len); \
243}
244APPEND_CMD_PTR_TO_IMM2(key, KEY);
245
246#define APPEND_CMD_RAW_IMM(cmd, op, type) \
247static inline void append_##cmd##_imm_##type(u32 *desc, type immediate, \
248 u32 options) \
249{ \
250 PRINT_POS; \
251 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(type)); \
252 append_cmd(desc, immediate); \
253}
254APPEND_CMD_RAW_IMM(load, LOAD, u32);
255
256/*
257 * Append math command. Only the last part of destination and source need to
258 * be specified
259 */
260#define APPEND_MATH(op, desc, dest, src_0, src_1, len) \
261append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \
262 MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32) (len & MATH_LEN_MASK));
263
264#define append_math_add(desc, dest, src0, src1, len) \
265 APPEND_MATH(ADD, desc, dest, src0, src1, len)
266#define append_math_sub(desc, dest, src0, src1, len) \
267 APPEND_MATH(SUB, desc, dest, src0, src1, len)
268#define append_math_add_c(desc, dest, src0, src1, len) \
269 APPEND_MATH(ADDC, desc, dest, src0, src1, len)
270#define append_math_sub_b(desc, dest, src0, src1, len) \
271 APPEND_MATH(SUBB, desc, dest, src0, src1, len)
272#define append_math_and(desc, dest, src0, src1, len) \
273 APPEND_MATH(AND, desc, dest, src0, src1, len)
274#define append_math_or(desc, dest, src0, src1, len) \
275 APPEND_MATH(OR, desc, dest, src0, src1, len)
276#define append_math_xor(desc, dest, src0, src1, len) \
277 APPEND_MATH(XOR, desc, dest, src0, src1, len)
278#define append_math_lshift(desc, dest, src0, src1, len) \
279 APPEND_MATH(LSHIFT, desc, dest, src0, src1, len)
280#define append_math_rshift(desc, dest, src0, src1, len) \
281 APPEND_MATH(RSHIFT, desc, dest, src0, src1, len)
282
283/* Exactly one source is IMM. Data is passed in as u32 value */
284#define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \
285do { \
286 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \
287 append_cmd(desc, data); \
288} while (0);
289
290#define append_math_add_imm_u32(desc, dest, src0, src1, data) \
291 APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data)
292#define append_math_sub_imm_u32(desc, dest, src0, src1, data) \
293 APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data)
294#define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \
295 APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data)
296#define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \
297 APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data)
298#define append_math_and_imm_u32(desc, dest, src0, src1, data) \
299 APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data)
300#define append_math_or_imm_u32(desc, dest, src0, src1, data) \
301 APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data)
302#define append_math_xor_imm_u32(desc, dest, src0, src1, data) \
303 APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data)
304#define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \
305 APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data)
306#define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \
307 APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data)