Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */
 
#include "cc_driver.h"
#include "cc_sram_mgr.h"
 
/**
 * cc_sram_mgr_init() - Initializes SRAM pool.
 *      The pool starts right at the beginning of SRAM.
 *      Returns zero for success, negative value otherwise.
 *
 * @drvdata: Associated device driver context
 *
 * Return:
 * 0 for success, negative error code for failure.
 */
int cc_sram_mgr_init(struct cc_drvdata *drvdata)
{
<------>u32 start = 0;
<------>struct device *dev = drvdata_to_dev(drvdata);
 
<------>if (drvdata->hw_rev < CC_HW_REV_712) {
<------><------>/* Pool starts after ROM bytes */
<------><------>start = cc_ioread(drvdata, CC_REG(HOST_SEP_SRAM_THRESHOLD));
<------><------>if ((start & 0x3) != 0) {
<------><------><------>dev_err(dev, "Invalid SRAM offset 0x%x\n", start);
<------><------><------>return -EINVAL;
<------><------>}
<------>}
 
<------>drvdata->sram_free_offset = start;
<------>return 0;
}
 
/**
 * cc_sram_alloc() - Allocate buffer from SRAM pool.
 *
 * @drvdata: Associated device driver context
 * @size: The requested numer of bytes to allocate
 *
 * Return:
 * Address offset in SRAM or NULL_SRAM_ADDR for failure.
 */
u32 cc_sram_alloc(struct cc_drvdata *drvdata, u32 size)
{
<------>struct device *dev = drvdata_to_dev(drvdata);
<------>u32 p;
 
<------>if ((size & 0x3)) {
<------><------>dev_err(dev, "Requested buffer size (%u) is not multiple of 4",
<------><------><------>size);
<------><------>return NULL_SRAM_ADDR;
<------>}
<------>if (size > (CC_CC_SRAM_SIZE - drvdata->sram_free_offset)) {
<------><------>dev_err(dev, "Not enough space to allocate %u B (at offset %u)\n",
<------><------><------>size, drvdata->sram_free_offset);
<------><------>return NULL_SRAM_ADDR;
<------>}
 
<------>p = drvdata->sram_free_offset;
<------>drvdata->sram_free_offset += size;
<------>dev_dbg(dev, "Allocated %u B @ %u\n", size, p);
<------>return p;
}
 
/**
 * cc_set_sram_desc() - Create const descriptors sequence to
 *	set values in given array into SRAM.
 * Note: each const value can't exceed word size.
 *
 * @src:	  A pointer to array of words to set as consts.
 * @dst:	  The target SRAM buffer to set into
 * @nelement:	  The number of words in "src" array
 * @seq:	  A pointer to the given IN/OUT descriptor sequence
 * @seq_len:	  A pointer to the given IN/OUT sequence length
 */
void cc_set_sram_desc(const u32 *src, u32 dst, unsigned int nelement,
<------><------>      struct cc_hw_desc *seq, unsigned int *seq_len)
{
<------>u32 i;
<------>unsigned int idx = *seq_len;
 
<------>for (i = 0; i < nelement; i++, idx++) {
<------><------>hw_desc_init(&seq[idx]);
<------><------>set_din_const(&seq[idx], src[i], sizeof(u32));
<------><------>set_dout_sram(&seq[idx], dst + (i * sizeof(u32)), sizeof(u32));
<------><------>set_flow_mode(&seq[idx], BYPASS);
<------>}
 
<------>*seq_len = idx;
}