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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
commit76cb841cb886eef6b3bee341a2266c76578724ad (patch)
treef5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /drivers/crypto/ccree/cc_sram_mgr.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/crypto/ccree/cc_sram_mgr.c')
-rw-r--r--drivers/crypto/ccree/cc_sram_mgr.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/crypto/ccree/cc_sram_mgr.c b/drivers/crypto/ccree/cc_sram_mgr.c
new file mode 100644
index 000000000..c8c276f6d
--- /dev/null
+++ b/drivers/crypto/ccree/cc_sram_mgr.c
@@ -0,0 +1,120 @@
+// 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;
+}