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crypto: caam - support external seq in/out lengths 

functions for external storage of seq in/out lengths,
i.e., for 32-bit lengths.

These type-dependent functions automatically determine whether to
store the length internally (embedded in the command header word) or
externally (after the address pointer), based on size of the type
given.

Signed-off-by: Yuan Kang <Yuan.Kang@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Yuan Kang 2012-06-22 19:48:43 -05:00 committed by Herbert Xu
parent a23d80e0b7
commit 6ec4733493
2 changed files with 50 additions and 4 deletions
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5
drivers/crypto/caam/caamalg.c
View File

@ -37,9 +37,10 @@
* | ShareDesc Pointer |
* | SEQ_OUT_PTR |
* | (output buffer) |
* | (output length) |
* | SEQ_IN_PTR |
* | (input buffer) |
* | LOAD (to DECO) |
* | (input length) |
* ---------------------
*/
@ -62,7 +63,7 @@
#define CAAM_MAX_IV_LENGTH 16
/* length of descriptors text */
#define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 3 + CAAM_PTR_SZ * 3)
#define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 5 + CAAM_PTR_SZ * 3)
#define DESC_AEAD_BASE (4 * CAAM_CMD_SZ)
#define DESC_AEAD_ENC_LEN (DESC_AEAD_BASE + 16 * CAAM_CMD_SZ)

49
drivers/crypto/caam/desc_constr.h
View File

@ -117,6 +117,15 @@ static inline void append_cmd_ptr(u32 *desc, dma_addr_t ptr, int len,
append_ptr(desc, ptr);
}
/* Write length after pointer, rather than inside command */
static inline void append_cmd_ptr_extlen(u32 *desc, dma_addr_t ptr,
unsigned int len, u32 command)
{
append_cmd(desc, command);
append_ptr(desc, ptr);
append_cmd(desc, len);
}
static inline void append_cmd_data(u32 *desc, void *data, int len,
u32 command)
{
@ -166,13 +175,22 @@ static inline void append_##cmd(u32 *desc, dma_addr_t ptr, unsigned int len, \
append_cmd_ptr(desc, ptr, len, CMD_##op | options); \
}
APPEND_CMD_PTR(key, KEY)
APPEND_CMD_PTR(seq_in_ptr, SEQ_IN_PTR)
APPEND_CMD_PTR(seq_out_ptr, SEQ_OUT_PTR)
APPEND_CMD_PTR(load, LOAD)
APPEND_CMD_PTR(store, STORE)
APPEND_CMD_PTR(fifo_load, FIFO_LOAD)
APPEND_CMD_PTR(fifo_store, FIFO_STORE)
#define APPEND_SEQ_PTR_INTLEN(cmd, op) \
static inline void append_seq_##cmd##_ptr_intlen(u32 *desc, dma_addr_t ptr, \
unsigned int len, \
u32 options) \
{ \
PRINT_POS; \
append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \
}
APPEND_SEQ_PTR_INTLEN(in, IN)
APPEND_SEQ_PTR_INTLEN(out, OUT)
#define APPEND_CMD_PTR_TO_IMM(cmd, op) \
static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
unsigned int len, u32 options) \
@ -183,6 +201,33 @@ static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
APPEND_CMD_PTR_TO_IMM(load, LOAD);
APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD);
#define APPEND_CMD_PTR_EXTLEN(cmd, op) \
static inline void append_##cmd##_extlen(u32 *desc, dma_addr_t ptr, \
unsigned int len, u32 options) \
{ \
PRINT_POS; \
append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \
}
APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR)
APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR)
/*
* Determine whether to store length internally or externally depending on
* the size of its type
*/
#define APPEND_CMD_PTR_LEN(cmd, op, type) \
static inline void append_##cmd(u32 *desc, dma_addr_t ptr, \
type len, u32 options) \
{ \
PRINT_POS; \
if (sizeof(type) > sizeof(u16)) \
append_##cmd##_extlen(desc, ptr, len, options); \
else \
append_##cmd##_intlen(desc, ptr, len, options); \
}
APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32)
APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32)
/*
* 2nd variant for commands whose specified immediate length differs
* from length of immediate data provided, e.g., split keys