drivers/crypto/ccree/cc_sram_mgr.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 2012-2018 ARM Limited or its affiliates. */
   3
   4 #ifndef __CC_SRAM_MGR_H__
   5 #define __CC_SRAM_MGR_H__
   6
   7 #ifndef CC_CC_SRAM_SIZE
   8 #define CC_CC_SRAM_SIZE 4096
   9 #endif
  10
  11 struct cc_drvdata;
  12
  13 /**
  14  * Address (offset) within CC internal SRAM
  15  */
  16
  17 typedef u64 cc_sram_addr_t;
  18
  19 #define NULL_SRAM_ADDR ((cc_sram_addr_t)-1)
  20
  21 /*!
  22  * Initializes SRAM pool.
  23  * The first X bytes of SRAM are reserved for ROM usage, hence, pool
  24  * starts right after X bytes.
  25  *
  26  * \param drvdata
  27  *
  28  * \return int Zero for success, negative value otherwise.
  29  */
  30 int cc_sram_mgr_init(struct cc_drvdata *drvdata);
  31
  32 /*!
  33  * Uninits SRAM pool.
  34  *
  35  * \param drvdata
  36  */
  37 void cc_sram_mgr_fini(struct cc_drvdata *drvdata);
  38
  39 /*!
  40  * Allocated buffer from SRAM pool.
  41  * Note: Caller is responsible to free the LAST allocated buffer.
  42  * This function does not taking care of any fragmentation may occur
  43  * by the order of calls to alloc/free.
  44  *
  45  * \param drvdata
  46  * \param size The requested bytes to allocate
  47  */
  48 cc_sram_addr_t cc_sram_alloc(struct cc_drvdata *drvdata, u32 size);
  49
  50 /**
  51  * cc_set_sram_desc() - Create const descriptors sequence to
  52  *      set values in given array into SRAM.
  53  * Note: each const value can't exceed word size.
  54  *
  55  * @src:          A pointer to array of words to set as consts.
  56  * @dst:          The target SRAM buffer to set into
  57  * @nelements:    The number of words in "src" array
  58  * @seq:          A pointer to the given IN/OUT descriptor sequence
  59  * @seq_len:      A pointer to the given IN/OUT sequence length
  60  */
  61 void cc_set_sram_desc(const u32 *src, cc_sram_addr_t dst,
  62                       unsigned int nelement, struct cc_hw_desc *seq,
  63                       unsigned int *seq_len);
  64
  65 #endif /*__CC_SRAM_MGR_H__*/