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1// SPDX-License-Identifier: GPL-2.02/* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */3 4#include "cc_driver.h"5#include "cc_sram_mgr.h"6 7/**8 * cc_sram_mgr_init() - Initializes SRAM pool.9 * The pool starts right at the beginning of SRAM.10 * Returns zero for success, negative value otherwise.11 *12 * @drvdata: Associated device driver context13 *14 * Return:15 * 0 for success, negative error code for failure.16 */17int cc_sram_mgr_init(struct cc_drvdata *drvdata)18{19 u32 start = 0;20 struct device *dev = drvdata_to_dev(drvdata);21 22 if (drvdata->hw_rev < CC_HW_REV_712) {23 /* Pool starts after ROM bytes */24 start = cc_ioread(drvdata, CC_REG(HOST_SEP_SRAM_THRESHOLD));25 if ((start & 0x3) != 0) {26 dev_err(dev, "Invalid SRAM offset 0x%x\n", start);27 return -EINVAL;28 }29 }30 31 drvdata->sram_free_offset = start;32 return 0;33}34 35/**36 * cc_sram_alloc() - Allocate buffer from SRAM pool.37 *38 * @drvdata: Associated device driver context39 * @size: The requested numer of bytes to allocate40 *41 * Return:42 * Address offset in SRAM or NULL_SRAM_ADDR for failure.43 */44u32 cc_sram_alloc(struct cc_drvdata *drvdata, u32 size)45{46 struct device *dev = drvdata_to_dev(drvdata);47 u32 p;48 49 if ((size & 0x3)) {50 dev_err(dev, "Requested buffer size (%u) is not multiple of 4",51 size);52 return NULL_SRAM_ADDR;53 }54 if (size > (CC_CC_SRAM_SIZE - drvdata->sram_free_offset)) {55 dev_err(dev, "Not enough space to allocate %u B (at offset %u)\n",56 size, drvdata->sram_free_offset);57 return NULL_SRAM_ADDR;58 }59 60 p = drvdata->sram_free_offset;61 drvdata->sram_free_offset += size;62 dev_dbg(dev, "Allocated %u B @ %u\n", size, p);63 return p;64}65 66/**67 * cc_set_sram_desc() - Create const descriptors sequence to68 * set values in given array into SRAM.69 * Note: each const value can't exceed word size.70 *71 * @src: A pointer to array of words to set as consts.72 * @dst: The target SRAM buffer to set into73 * @nelement: The number of words in "src" array74 * @seq: A pointer to the given IN/OUT descriptor sequence75 * @seq_len: A pointer to the given IN/OUT sequence length76 */77void cc_set_sram_desc(const u32 *src, u32 dst, unsigned int nelement,78 struct cc_hw_desc *seq, unsigned int *seq_len)79{80 u32 i;81 unsigned int idx = *seq_len;82 83 for (i = 0; i < nelement; i++, idx++) {84 hw_desc_init(&seq[idx]);85 set_din_const(&seq[idx], src[i], sizeof(u32));86 set_dout_sram(&seq[idx], dst + (i * sizeof(u32)), sizeof(u32));87 set_flow_mode(&seq[idx], BYPASS);88 }89 90 *seq_len = idx;91}92