// 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, unsignedint nelement, struct cc_hw_desc *seq, unsignedint *seq_len)
{
u32 i; unsignedint 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;
}
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