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 2008-2011 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 * 64)
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 DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
22 LDST_SRCDST_WORD_DECOCTRL | \
23 (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
24#define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
25 LDST_SRCDST_WORD_DECOCTRL | \
26 (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
27
28static inline int desc_len(u32 *desc)
29{
30 return *desc & HDR_DESCLEN_MASK;
31}
32
33static inline int desc_bytes(void *desc)
34{
35 return desc_len(desc) * CAAM_CMD_SZ;
36}
37
38static inline u32 *desc_end(u32 *desc)
39{
40 return desc + desc_len(desc);
41}
42
43static inline void *sh_desc_pdb(u32 *desc)
44{
45 return desc + 1;
46}
47
48static inline void init_desc(u32 *desc, u32 options)
49{
50 *desc = options | HDR_ONE | 1;
51}
52
53static inline void init_sh_desc(u32 *desc, u32 options)
54{
55 PRINT_POS;
56 init_desc(desc, CMD_SHARED_DESC_HDR | options);
57}
58
59static inline void init_sh_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes)
60{
61 u32 pdb_len = pdb_bytes / CAAM_CMD_SZ + 1;
62
63 init_sh_desc(desc, ((pdb_len << HDR_START_IDX_SHIFT) + pdb_len) |
64 options);
65}
66
67static inline void init_job_desc(u32 *desc, u32 options)
68{
69 init_desc(desc, CMD_DESC_HDR | options);
70}
71
72static inline void append_ptr(u32 *desc, dma_addr_t ptr)
73{
74 dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
75
76 *offset = ptr;
77
78 (*desc) += CAAM_PTR_SZ / CAAM_CMD_SZ;
79}
80
81static inline void init_job_desc_shared(u32 *desc, dma_addr_t ptr, int len,
82 u32 options)
83{
84 PRINT_POS;
85 init_job_desc(desc, HDR_SHARED | options |
86 (len << HDR_START_IDX_SHIFT));
87 append_ptr(desc, ptr);
88}
89
90static inline void append_data(u32 *desc, void *data, int len)
91{
92 u32 *offset = desc_end(desc);
93
94 if (len) /* avoid sparse warning: memcpy with byte count of 0 */
95 memcpy(offset, data, len);
96
97 (*desc) += (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
98}
99
100static inline void append_cmd(u32 *desc, u32 command)
101{
102 u32 *cmd = desc_end(desc);
103
104 *cmd = command;
105
106 (*desc)++;
107}
108
109static inline void append_cmd_ptr(u32 *desc, dma_addr_t ptr, int len,
110 u32 command)
111{
112 append_cmd(desc, command | len);
113 append_ptr(desc, ptr);
114}
115
116static inline void append_cmd_data(u32 *desc, void *data, int len,
117 u32 command)
118{
119 append_cmd(desc, command | IMMEDIATE | len);
120 append_data(desc, data, len);
121}
122
123static inline u32 *append_jump(u32 *desc, u32 options)
124{
125 u32 *cmd = desc_end(desc);
126
127 PRINT_POS;
128 append_cmd(desc, CMD_JUMP | options);
129
130 return cmd;
131}
132
133static inline void set_jump_tgt_here(u32 *desc, u32 *jump_cmd)
134{
135 *jump_cmd = *jump_cmd | (desc_len(desc) - (jump_cmd - desc));
136}
137
138#define APPEND_CMD(cmd, op) \
139static inline void append_##cmd(u32 *desc, u32 options) \
140{ \
141 PRINT_POS; \
142 append_cmd(desc, CMD_##op | options); \
143}
144APPEND_CMD(operation, OPERATION)
145APPEND_CMD(move, MOVE)
146
147#define APPEND_CMD_LEN(cmd, op) \
148static inline void append_##cmd(u32 *desc, unsigned int len, u32 options) \
149{ \
150 PRINT_POS; \
151 append_cmd(desc, CMD_##op | len | options); \
152}
153APPEND_CMD_LEN(seq_store, SEQ_STORE)
154APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD)
155APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE)
156
157#define APPEND_CMD_PTR(cmd, op) \
158static inline void append_##cmd(u32 *desc, dma_addr_t ptr, unsigned int len, \
159 u32 options) \
160{ \
161 PRINT_POS; \
162 append_cmd_ptr(desc, ptr, len, CMD_##op | options); \
163}
164APPEND_CMD_PTR(key, KEY)
165APPEND_CMD_PTR(seq_in_ptr, SEQ_IN_PTR)
166APPEND_CMD_PTR(seq_out_ptr, SEQ_OUT_PTR)
167APPEND_CMD_PTR(load, LOAD)
168APPEND_CMD_PTR(store, STORE)
169APPEND_CMD_PTR(fifo_load, FIFO_LOAD)
170APPEND_CMD_PTR(fifo_store, FIFO_STORE)
171
172#define APPEND_CMD_PTR_TO_IMM(cmd, op) \
173static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
174 unsigned int len, u32 options) \
175{ \
176 PRINT_POS; \
177 append_cmd_data(desc, data, len, CMD_##op | options); \
178}
179APPEND_CMD_PTR_TO_IMM(load, LOAD);
180APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD);
181
182/*
183 * 2nd variant for commands whose specified immediate length differs
184 * from length of immediate data provided, e.g., split keys
185 */
186#define APPEND_CMD_PTR_TO_IMM2(cmd, op) \
187static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
188 unsigned int data_len, \
189 unsigned int len, u32 options) \
190{ \
191 PRINT_POS; \
192 append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \
193 append_data(desc, data, data_len); \
194}
195APPEND_CMD_PTR_TO_IMM2(key, KEY);
196
197#define APPEND_CMD_RAW_IMM(cmd, op, type) \
198static inline void append_##cmd##_imm_##type(u32 *desc, type immediate, \
199 u32 options) \
200{ \
201 PRINT_POS; \
202 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(type)); \
203 append_cmd(desc, immediate); \
204}
205APPEND_CMD_RAW_IMM(load, LOAD, u32);