drivers/crypto/ccree/cc_sram_mgr.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 2012-2019 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 #define NULL_SRAM_ADDR ((u32)-1)
  14
  15 /**
  16  * cc_sram_mgr_init() - Initializes SRAM pool.
  17  * The first X bytes of SRAM are reserved for ROM usage, hence, pool
  18  * starts right after X bytes.
  19  *
  20  * @drvdata: Associated device driver context
  21  *
  22  * Return:
  23  * Zero for success, negative value otherwise.
  24  */
  25 int cc_sram_mgr_init(struct cc_drvdata *drvdata);
  26
  27 /**
  28  * cc_sram_alloc() - Allocate buffer from SRAM pool.
  29  *
  30  * @drvdata: Associated device driver context
  31  * @size: The requested bytes to allocate
  32  *
  33  * Return:
  34  * Address offset in SRAM or NULL_SRAM_ADDR for failure.
  35  */
  36 u32 cc_sram_alloc(struct cc_drvdata *drvdata, u32 size);
  37
  38 /**
  39  * cc_set_sram_desc() - Create const descriptors sequence to
  40  *      set values in given array into SRAM.
  41  * Note: each const value can't exceed word size.
  42  *
  43  * @src:          A pointer to array of words to set as consts.
  44  * @dst:          The target SRAM buffer to set into
  45  * @nelement:     The number of words in "src" array
  46  * @seq:          A pointer to the given IN/OUT descriptor sequence
  47  * @seq_len:      A pointer to the given IN/OUT sequence length
  48  */
  49 void cc_set_sram_desc(const u32 *src, u32 dst, unsigned int nelement,
  50                       struct cc_hw_desc *seq, unsigned int *seq_len);
  51
  52 #endif /*__CC_SRAM_MGR_H__*/