1 files changed, 205 insertions, 0 deletions

diff --git a/drivers/crypto/caam/desc_constr.h b/drivers/crypto/caam/desc_constr.h
new file mode 100644
index 000000000000..46915800c26f
--- /dev/null
+++ b/drivers/crypto/caam/desc_constr.h
@@ -0,0 +1,205 @@
+/*
+ * caam descriptor construction helper functions
+ *
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
+ */
+
+#include "desc.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 * 64)
+
+#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 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))
+
+static inline int desc_len(u32 *desc)
+{
+        return *desc & HDR_DESCLEN_MASK;
+}
+
+static inline int desc_bytes(void *desc)
+{
+        return desc_len(desc) * CAAM_CMD_SZ;
+}
+
+static inline u32 *desc_end(u32 *desc)
+{
+        return desc + desc_len(desc);
+}
+
+static inline void *sh_desc_pdb(u32 *desc)
+{
+        return desc + 1;
+}
+
+static inline void init_desc(u32 *desc, u32 options)
+{
+        *desc = options | HDR_ONE | 1;
+}
+
+static inline void init_sh_desc(u32 *desc, u32 options)
+{
+        PRINT_POS;
+        init_desc(desc, CMD_SHARED_DESC_HDR | options);
+}
+
+static inline void init_sh_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes)
+{
+        u32 pdb_len = pdb_bytes / CAAM_CMD_SZ + 1;
+
+        init_sh_desc(desc, ((pdb_len << HDR_START_IDX_SHIFT) + pdb_len) |
+                     options);
+}
+
+static inline void init_job_desc(u32 *desc, u32 options)
+{
+        init_desc(desc, CMD_DESC_HDR | options);
+}
+
+static inline void append_ptr(u32 *desc, dma_addr_t ptr)
+{
+        dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
+
+        *offset = ptr;
+
+        (*desc) += CAAM_PTR_SZ / CAAM_CMD_SZ;
+}
+
+static inline void init_job_desc_shared(u32 *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);
+}
+
+static inline void append_data(u32 *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) += (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
+}
+
+static inline void append_cmd(u32 *desc, u32 command)
+{
+        u32 *cmd = desc_end(desc);
+
+        *cmd = command;
+
+        (*desc)++;
+}
+
+static inline void append_cmd_ptr(u32 *desc, dma_addr_t ptr, int len,
+                                  u32 command)
+{
+        append_cmd(desc, command | len);
+        append_ptr(desc, ptr);
+}
+
+static inline void append_cmd_data(u32 *desc, void *data, int len,
+                                   u32 command)
+{
+        append_cmd(desc, command | IMMEDIATE | len);
+        append_data(desc, data, len);
+}
+
+static inline u32 *append_jump(u32 *desc, u32 options)
+{
+        u32 *cmd = desc_end(desc);
+
+        PRINT_POS;
+        append_cmd(desc, CMD_JUMP | options);
+
+        return cmd;
+}
+
+static inline void set_jump_tgt_here(u32 *desc, u32 *jump_cmd)
+{
+        *jump_cmd = *jump_cmd | (desc_len(desc) - (jump_cmd - desc));
+}
+
+#define APPEND_CMD(cmd, op) \
+static inline void append_##cmd(u32 *desc, u32 options) \
+{ \
+        PRINT_POS; \
+        append_cmd(desc, CMD_##op | options); \
+}
+APPEND_CMD(operation, OPERATION)
+APPEND_CMD(move, MOVE)
+
+#define APPEND_CMD_LEN(cmd, op) \
+static inline void append_##cmd(u32 *desc, unsigned int len, u32 options) \
+{ \
+        PRINT_POS; \
+        append_cmd(desc, CMD_##op | len | options); \
+}
+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 *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(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_CMD_PTR_TO_IMM(cmd, op) \
+static inline void append_##cmd##_as_imm(u32 *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);
+
+/*
+ * 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 *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 *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);