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- // 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;
- }
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