Release 4.11 drivers/crypto/caam/desc_constr.h

/*
 * caam descriptor construction helper functions
 *
 * Copyright 2008-2012 Freescale Semiconductor, Inc.
 */

#include "desc.h"
#include "regs.h"


#define IMMEDIATE (1 << 23)

#define CAAM_CMD_SZ sizeof(u32)

#define CAAM_PTR_SZ sizeof(dma_addr_t)

#define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE)

#define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 5 + CAAM_PTR_SZ * 3)

#ifdef DEBUG

#define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\
                              &__func__[sizeof("append")]); } while (0)
#else

#define PRINT_POS
#endif


#define SET_OK_NO_PROP_ERRORS (IMMEDIATE | LDST_CLASS_DECO | \
                               LDST_SRCDST_WORD_DECOCTRL | \
                               (LDOFF_CHG_SHARE_OK_NO_PROP << \
                                LDST_OFFSET_SHIFT))

#define DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
                                LDST_SRCDST_WORD_DECOCTRL | \
                                (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))

#define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
                               LDST_SRCDST_WORD_DECOCTRL | \
                               (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))

extern bool caam_little_end;



static inline int desc_len(u32 * const desc)
{
	return caam32_to_cpu(*desc) & HDR_DESCLEN_MASK;
}

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static inline int desc_bytes(void * const desc)
{
	return desc_len(desc) * CAAM_CMD_SZ;
}

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static inline u32 *desc_end(u32 * const desc)
{
	return desc + desc_len(desc);
}

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static inline void *sh_desc_pdb(u32 * const desc)
{
	return desc + 1;
}

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static inline void init_desc(u32 * const desc, u32 options)
{
	*desc = cpu_to_caam32((options | HDR_ONE) + 1);
}

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static inline void init_sh_desc(u32 * const desc, u32 options)
{
	PRINT_POS;
	init_desc(desc, CMD_SHARED_DESC_HDR | options);
}

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static inline void init_sh_desc_pdb(u32 * const desc, u32 options,
				    size_t pdb_bytes)
{
	u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;

	init_sh_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT) + pdb_len) |
		     options);
}

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static inline void init_job_desc(u32 * const desc, u32 options)
{
	init_desc(desc, CMD_DESC_HDR | options);
}

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static inline void init_job_desc_pdb(u32 * const desc, u32 options,
				     size_t pdb_bytes)
{
	u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;

	init_job_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT)) | options);
}

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static inline void append_ptr(u32 * const desc, dma_addr_t ptr)
{
	dma_addr_t *offset = (dma_addr_t *)desc_end(desc);

	*offset = cpu_to_caam_dma(ptr);

	(*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
				CAAM_PTR_SZ / CAAM_CMD_SZ);
}

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static inline void init_job_desc_shared(u32 * const desc, dma_addr_t ptr,
					int len, u32 options)
{
	PRINT_POS;
	init_job_desc(desc, HDR_SHARED | options |
		      (len << HDR_START_IDX_SHIFT));
	append_ptr(desc, ptr);
}

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static inline void append_data(u32 * const desc, void *data, int len)
{
	u32 *offset = desc_end(desc);

	if (len) /* avoid sparse warning: memcpy with byte count of 0 */
		memcpy(offset, data, len);

	(*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
				(len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ);
}

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static inline void append_cmd(u32 * const desc, u32 command)
{
	u32 *cmd = desc_end(desc);

	*cmd = cpu_to_caam32(command);

	(*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 1);
}

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#define append_u32 append_cmd



static inline void append_u64(u32 * const desc, u64 data)
{
	u32 *offset = desc_end(desc);

	/* Only 32-bit alignment is guaranteed in descriptor buffer */
	if (caam_little_end) {
		*offset = cpu_to_caam32(lower_32_bits(data));
		*(++offset) = cpu_to_caam32(upper_32_bits(data));
	} else {
		*offset = cpu_to_caam32(upper_32_bits(data));
		*(++offset) = cpu_to_caam32(lower_32_bits(data));
	}

	(*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 2);
}

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/* Write command without affecting header, and return pointer to next word */


static inline u32 *write_cmd(u32 * const desc, u32 command)
{
	*desc = cpu_to_caam32(command);

	return desc + 1;
}

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static inline void append_cmd_ptr(u32 * const desc, dma_addr_t ptr, int len,
				  u32 command)
{
	append_cmd(desc, command | len);
	append_ptr(desc, ptr);
}

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/* Write length after pointer, rather than inside command */


static inline void append_cmd_ptr_extlen(u32 * const desc, dma_addr_t ptr,
					 unsigned int len, u32 command)
{
	append_cmd(desc, command);
	if (!(command & (SQIN_RTO | SQIN_PRE)))
		append_ptr(desc, ptr);
	append_cmd(desc, len);
}

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static inline void append_cmd_data(u32 * const desc, void *data, int len,
				   u32 command)
{
	append_cmd(desc, command | IMMEDIATE | len);
	append_data(desc, data, len);
}

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#define APPEND_CMD_RET(cmd, op) \
static inline u32 *append_##cmd(u32 * const desc, u32 options) \
{ \
        u32 *cmd = desc_end(desc); \
        PRINT_POS; \
        append_cmd(desc, CMD_##op | options); \
        return cmd; \
}
APPEND_CMD_RET(jump, JUMP)
APPEND_CMD_RET(move, MOVE)



static inline void set_jump_tgt_here(u32 * const desc, u32 *jump_cmd)
{
	*jump_cmd = cpu_to_caam32(caam32_to_cpu(*jump_cmd) |
				  (desc_len(desc) - (jump_cmd - desc)));
}

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static inline void set_move_tgt_here(u32 * const desc, u32 *move_cmd)
{
	u32 val = caam32_to_cpu(*move_cmd);

	val &= ~MOVE_OFFSET_MASK;
	val |= (desc_len(desc) << (MOVE_OFFSET_SHIFT + 2)) & MOVE_OFFSET_MASK;
	*move_cmd = cpu_to_caam32(val);
}

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#define APPEND_CMD(cmd, op) \
static inline void append_##cmd(u32 * const desc, u32 options) \
{ \
        PRINT_POS; \
        append_cmd(desc, CMD_##op | options); \
}
APPEND_CMD(operation, OPERATION)


#define APPEND_CMD_LEN(cmd, op) \
static inline void append_##cmd(u32 * const desc, unsigned int len, \
                                u32 options) \
{ \
        PRINT_POS; \
        append_cmd(desc, CMD_##op | len | options); \
}

APPEND_CMD_LEN(seq_load, SEQ_LOAD)
APPEND_CMD_LEN(seq_store, SEQ_STORE)
APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD)
APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE)


#define APPEND_CMD_PTR(cmd, op) \
static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \
                                unsigned int len, u32 options) \
{ \
        PRINT_POS; \
        append_cmd_ptr(desc, ptr, len, CMD_##op | options); \
}
APPEND_CMD_PTR(key, KEY)
APPEND_CMD_PTR(load, LOAD)
APPEND_CMD_PTR(fifo_load, FIFO_LOAD)
APPEND_CMD_PTR(fifo_store, FIFO_STORE)



static inline void append_store(u32 * const desc, dma_addr_t ptr,
				unsigned int len, u32 options)
{
	u32 cmd_src;

	cmd_src = options & LDST_SRCDST_MASK;

	append_cmd(desc, CMD_STORE | options | len);

	/* The following options do not require pointer */
	if (!(cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED ||
	      cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB    ||
	      cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB_WE ||
	      cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED_WE))
		append_ptr(desc, ptr);
}

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#define APPEND_SEQ_PTR_INTLEN(cmd, op) \
static inline void append_seq_##cmd##_ptr_intlen(u32 * const desc, \
                                                 dma_addr_t ptr, \
                                                 unsigned int len, \
                                                 u32 options) \
{ \
        PRINT_POS; \
        if (options & (SQIN_RTO | SQIN_PRE)) \
                append_cmd(desc, CMD_SEQ_##op##_PTR | len | options); \
        else \
                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 * const desc, void *data, \
                                         unsigned int len, u32 options) \
{ \
        PRINT_POS; \
        append_cmd_data(desc, data, len, CMD_##op | options); \
}
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 * const 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 * const 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
 */

#define APPEND_CMD_PTR_TO_IMM2(cmd, op) \
static inline void append_##cmd##_as_imm(u32 * const desc, void *data, \
                                         unsigned int data_len, \
                                         unsigned int len, u32 options) \
{ \
        PRINT_POS; \
        append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \
        append_data(desc, data, data_len); \
}

APPEND_CMD_PTR_TO_IMM2(key, KEY);


#define APPEND_CMD_RAW_IMM(cmd, op, type) \
static inline void append_##cmd##_imm_##type(u32 * const desc, type immediate, \
                                             u32 options) \
{ \
        PRINT_POS; \
        append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(type)); \
        append_cmd(desc, immediate); \
}
APPEND_CMD_RAW_IMM(load, LOAD, u32);

/*
 * ee - endianness
 * size - size of immediate type in bytes
 */

#define APPEND_CMD_RAW_IMM2(cmd, op, ee, size) \
static inline void append_##cmd##_imm_##ee##size(u32 *desc, \
                                                   u##size immediate, \
                                                   u32 options) \
{ \
        __##ee##size data = cpu_to_##ee##size(immediate); \
        PRINT_POS; \
        append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(data)); \
        append_data(desc, &data, sizeof(data)); \
}

APPEND_CMD_RAW_IMM2(load, LOAD, be, 32);

/*
 * Append math command. Only the last part of destination and source need to
 * be specified
 */

#define APPEND_MATH(op, desc, dest, src_0, src_1, len) \
append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \
        MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32)len);


#define append_math_add(desc, dest, src0, src1, len) \
	APPEND_MATH(ADD, desc, dest, src0, src1, len)

#define append_math_sub(desc, dest, src0, src1, len) \
	APPEND_MATH(SUB, desc, dest, src0, src1, len)

#define append_math_add_c(desc, dest, src0, src1, len) \
	APPEND_MATH(ADDC, desc, dest, src0, src1, len)

#define append_math_sub_b(desc, dest, src0, src1, len) \
	APPEND_MATH(SUBB, desc, dest, src0, src1, len)

#define append_math_and(desc, dest, src0, src1, len) \
	APPEND_MATH(AND, desc, dest, src0, src1, len)

#define append_math_or(desc, dest, src0, src1, len) \
	APPEND_MATH(OR, desc, dest, src0, src1, len)

#define append_math_xor(desc, dest, src0, src1, len) \
	APPEND_MATH(XOR, desc, dest, src0, src1, len)

#define append_math_lshift(desc, dest, src0, src1, len) \
	APPEND_MATH(LSHIFT, desc, dest, src0, src1, len)

#define append_math_rshift(desc, dest, src0, src1, len) \
	APPEND_MATH(RSHIFT, desc, dest, src0, src1, len)

#define append_math_ldshift(desc, dest, src0, src1, len) \
	APPEND_MATH(SHLD, desc, dest, src0, src1, len)

/* Exactly one source is IMM. Data is passed in as u32 value */

#define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \
do { \
        APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \
        append_cmd(desc, data); \
} while (0)


#define append_math_add_imm_u32(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data)

#define append_math_sub_imm_u32(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data)

#define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data)

#define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data)

#define append_math_and_imm_u32(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data)

#define append_math_or_imm_u32(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data)

#define append_math_xor_imm_u32(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data)

#define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data)

#define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data)

/* Exactly one source is IMM. Data is passed in as u64 value */

#define APPEND_MATH_IMM_u64(op, desc, dest, src_0, src_1, data) \
do { \
        u32 upper = (data >> 16) >> 16; \
        APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ * 2 | \
                    (upper ? 0 : MATH_IFB)); \
        if (upper) \
                append_u64(desc, data); \
        else \
                append_u32(desc, lower_32_bits(data)); \
} while (0)


#define append_math_add_imm_u64(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u64(ADD, desc, dest, src0, src1, data)

#define append_math_sub_imm_u64(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u64(SUB, desc, dest, src0, src1, data)

#define append_math_add_c_imm_u64(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u64(ADDC, desc, dest, src0, src1, data)

#define append_math_sub_b_imm_u64(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u64(SUBB, desc, dest, src0, src1, data)

#define append_math_and_imm_u64(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u64(AND, desc, dest, src0, src1, data)

#define append_math_or_imm_u64(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u64(OR, desc, dest, src0, src1, data)

#define append_math_xor_imm_u64(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u64(XOR, desc, dest, src0, src1, data)

#define append_math_lshift_imm_u64(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u64(LSHIFT, desc, dest, src0, src1, data)

#define append_math_rshift_imm_u64(desc, dest, src0, src1, data) \
	APPEND_MATH_IMM_u64(RSHIFT, desc, dest, src0, src1, data)

/**
 * struct alginfo - Container for algorithm details
 * @algtype: algorithm selector; for valid values, see documentation of the
 *           functions where it is used.
 * @keylen: length of the provided algorithm key, in bytes
 * @keylen_pad: padded length of the provided algorithm key, in bytes
 * @key: address where algorithm key resides; virtual address if key_inline
 *       is true, dma (bus) address if key_inline is false.
 * @key_inline: true - key can be inlined in the descriptor; false - key is
 *              referenced by the descriptor
 */

struct alginfo {
	
u32 algtype;
	
unsigned int keylen;
	
unsigned int keylen_pad;
	union {
		
dma_addr_t key_dma;
		
void *key_virt;
	};
	
bool key_inline;
};

/**
 * desc_inline_query() - Provide indications on which data items can be inlined
 *                       and which shall be referenced in a shared descriptor.
 * @sd_base_len: Shared descriptor base length - bytes consumed by the commands,
 *               excluding the data items to be inlined (or corresponding
 *               pointer if an item is not inlined). Each cnstr_* function that
 *               generates descriptors should have a define mentioning
 *               corresponding length.
 * @jd_len: Maximum length of the job descriptor(s) that will be used
 *          together with the shared descriptor.
 * @data_len: Array of lengths of the data items trying to be inlined
 * @inl_mask: 32bit mask with bit x = 1 if data item x can be inlined, 0
 *            otherwise.
 * @count: Number of data items (size of @data_len array); must be <= 32
 *
 * Return: 0 if data can be inlined / referenced, negative value if not. If 0,
 *         check @inl_mask for details.
 */


static inline int desc_inline_query(unsigned int sd_base_len,
				    unsigned int jd_len, unsigned int *data_len,
				    u32 *inl_mask, unsigned int count)
{
	int rem_bytes = (int)(CAAM_DESC_BYTES_MAX - sd_base_len - jd_len);
	unsigned int i;

	*inl_mask = 0;
	for (i = 0; (i < count) && (rem_bytes > 0); i++) {
		if (rem_bytes - (int)(data_len[i] +
			(count - i - 1) * CAAM_PTR_SZ) >= 0) {
			rem_bytes -= data_len[i];
			*inl_mask |= (1 << i);
		} else {
			rem_bytes -= CAAM_PTR_SZ;
		}
	}

	return (rem_bytes >= 0) ? 0 : -1;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Horia Geantă
137
100.00%
1
100.00%
Total
137
100.00%
1
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Kim Phillips
657
34.40%
4
18.18%
Yuan Kang
440
23.04%
2
9.09%
Horia Geantă
372
19.48%
5
22.73%
Andrei Varvara
340
17.80%
4
18.18%
Tudor Ambarus
50
2.62%
2
9.09%
Catalin Vasile
32
1.68%
2
9.09%
Arnd Bergmann
10
0.52%
1
4.55%
Yashpal Dutta
5
0.26%
1
4.55%
Vakul Garg
4
0.21%
1
4.55%
Total
1910
100.00%
22
100.00%
Directory: drivers/crypto/caam

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