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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