forked from Minki/linux
27b3b22dd9
Add support for the legacy CryptoCell 630 and 710 revs. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */
|
|
|
|
#include "cc_driver.h"
|
|
#include "cc_sram_mgr.h"
|
|
|
|
/**
|
|
* struct cc_sram_ctx -Internal RAM context manager
|
|
* @sram_free_offset: the offset to the non-allocated area
|
|
*/
|
|
struct cc_sram_ctx {
|
|
cc_sram_addr_t sram_free_offset;
|
|
};
|
|
|
|
/**
|
|
* cc_sram_mgr_fini() - Cleanup SRAM pool.
|
|
*
|
|
* @drvdata: Associated device driver context
|
|
*/
|
|
void cc_sram_mgr_fini(struct cc_drvdata *drvdata)
|
|
{
|
|
/* Free "this" context */
|
|
kfree(drvdata->sram_mgr_handle);
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
int cc_sram_mgr_init(struct cc_drvdata *drvdata)
|
|
{
|
|
struct cc_sram_ctx *ctx;
|
|
dma_addr_t start = 0;
|
|
struct device *dev = drvdata_to_dev(drvdata);
|
|
|
|
if (drvdata->hw_rev < CC_HW_REV_712) {
|
|
/* Pool starts after ROM bytes */
|
|
start = (dma_addr_t)cc_ioread(drvdata,
|
|
CC_REG(HOST_SEP_SRAM_THRESHOLD));
|
|
|
|
if ((start & 0x3) != 0) {
|
|
dev_err(dev, "Invalid SRAM offset %pad\n", &start);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Allocate "this" context */
|
|
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
|
|
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
|
|
ctx->sram_free_offset = start;
|
|
drvdata->sram_mgr_handle = ctx;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*!
|
|
* Allocated buffer from SRAM pool.
|
|
* Note: Caller is responsible to free the LAST allocated buffer.
|
|
* This function does not taking care of any fragmentation may occur
|
|
* by the order of calls to alloc/free.
|
|
*
|
|
* \param drvdata
|
|
* \param size The requested bytes to allocate
|
|
*/
|
|
cc_sram_addr_t cc_sram_alloc(struct cc_drvdata *drvdata, u32 size)
|
|
{
|
|
struct cc_sram_ctx *smgr_ctx = drvdata->sram_mgr_handle;
|
|
struct device *dev = drvdata_to_dev(drvdata);
|
|
cc_sram_addr_t 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 - smgr_ctx->sram_free_offset)) {
|
|
dev_err(dev, "Not enough space to allocate %u B (at offset %llu)\n",
|
|
size, smgr_ctx->sram_free_offset);
|
|
return NULL_SRAM_ADDR;
|
|
}
|
|
|
|
p = smgr_ctx->sram_free_offset;
|
|
smgr_ctx->sram_free_offset += size;
|
|
dev_dbg(dev, "Allocated %u B @ %u\n", size, (unsigned int)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
|
|
* @nelements: 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, cc_sram_addr_t 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;
|
|
}
|