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-rw-r--r--drivers/crypto/amlogic/amlogic-gxl.h162
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/crypto/amlogic/amlogic-gxl.h b/drivers/crypto/amlogic/amlogic-gxl.h
new file mode 100644
index 000000000..8c0746a1d
--- /dev/null
+++ b/drivers/crypto/amlogic/amlogic-gxl.h
@@ -0,0 +1,162 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * amlogic.h - hardware cryptographic offloader for Amlogic SoC
+ *
+ * Copyright (C) 2018-2019 Corentin LABBE <clabbe@baylibre.com>
+ */
+#include <crypto/aes.h>
+#include <crypto/engine.h>
+#include <crypto/skcipher.h>
+#include <linux/debugfs.h>
+#include <linux/crypto.h>
+#include <linux/scatterlist.h>
+
+#define MODE_KEY 1
+#define MODE_AES_128 0x8
+#define MODE_AES_192 0x9
+#define MODE_AES_256 0xa
+
+#define MESON_DECRYPT 0
+#define MESON_ENCRYPT 1
+
+#define MESON_OPMODE_ECB 0
+#define MESON_OPMODE_CBC 1
+
+#define MAXFLOW 2
+
+#define MAXDESC 64
+
+#define DESC_LAST BIT(18)
+#define DESC_ENCRYPTION BIT(28)
+#define DESC_OWN BIT(31)
+
+/*
+ * struct meson_desc - Descriptor for DMA operations
+ * Note that without datasheet, some are unknown
+ * @t_status: Descriptor of the cipher operation (see description below)
+ * @t_src: Physical address of data to read
+ * @t_dst: Physical address of data to write
+ * t_status is segmented like this:
+ * @len: 0-16 length of data to operate
+ * @irq: 17 Ignored by hardware
+ * @eoc: 18 End means the descriptor is the last
+ * @loop: 19 Unknown
+ * @mode: 20-23 Type of algorithm (AES, SHA)
+ * @begin: 24 Unknown
+ * @end: 25 Unknown
+ * @op_mode: 26-27 Blockmode (CBC, ECB)
+ * @enc: 28 0 means decryption, 1 is for encryption
+ * @block: 29 Unknown
+ * @error: 30 Unknown
+ * @owner: 31 owner of the descriptor, 1 own by HW
+ */
+struct meson_desc {
+ __le32 t_status;
+ __le32 t_src;
+ __le32 t_dst;
+};
+
+/*
+ * struct meson_flow - Information used by each flow
+ * @engine: ptr to the crypto_engine for this flow
+ * @keylen: keylen for this flow operation
+ * @complete: completion for the current task on this flow
+ * @status: set to 1 by interrupt if task is done
+ * @t_phy: Physical address of task
+ * @tl: pointer to the current ce_task for this flow
+ * @stat_req: number of request done by this flow
+ */
+struct meson_flow {
+ struct crypto_engine *engine;
+ struct completion complete;
+ int status;
+ unsigned int keylen;
+ dma_addr_t t_phy;
+ struct meson_desc *tl;
+#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
+ unsigned long stat_req;
+#endif
+};
+
+/*
+ * struct meson_dev - main container for all this driver information
+ * @base: base address of amlogic-crypto
+ * @busclk: bus clock for amlogic-crypto
+ * @dev: the platform device
+ * @chanlist: array of all flow
+ * @flow: flow to use in next request
+ * @irqs: IRQ numbers for amlogic-crypto
+ * @dbgfs_dir: Debugfs dentry for statistic directory
+ * @dbgfs_stats: Debugfs dentry for statistic counters
+ */
+struct meson_dev {
+ void __iomem *base;
+ struct clk *busclk;
+ struct device *dev;
+ struct meson_flow *chanlist;
+ atomic_t flow;
+ int irqs[MAXFLOW];
+#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
+ struct dentry *dbgfs_dir;
+#endif
+};
+
+/*
+ * struct meson_cipher_req_ctx - context for a skcipher request
+ * @op_dir: direction (encrypt vs decrypt) for this request
+ * @flow: the flow to use for this request
+ */
+struct meson_cipher_req_ctx {
+ u32 op_dir;
+ int flow;
+ struct skcipher_request fallback_req; // keep at the end
+};
+
+/*
+ * struct meson_cipher_tfm_ctx - context for a skcipher TFM
+ * @enginectx: crypto_engine used by this TFM
+ * @key: pointer to key data
+ * @keylen: len of the key
+ * @keymode: The keymode(type and size of key) associated with this TFM
+ * @mc: pointer to the private data of driver handling this TFM
+ * @fallback_tfm: pointer to the fallback TFM
+ */
+struct meson_cipher_tfm_ctx {
+ struct crypto_engine_ctx enginectx;
+ u32 *key;
+ u32 keylen;
+ u32 keymode;
+ struct meson_dev *mc;
+ struct crypto_skcipher *fallback_tfm;
+};
+
+/*
+ * struct meson_alg_template - crypto_alg template
+ * @type: the CRYPTO_ALG_TYPE for this template
+ * @blockmode: the type of block operation
+ * @mc: pointer to the meson_dev structure associated with this template
+ * @alg: one of sub struct must be used
+ * @stat_req: number of request done on this template
+ * @stat_fb: total of all data len done on this template
+ */
+struct meson_alg_template {
+ u32 type;
+ u32 blockmode;
+ union {
+ struct skcipher_alg skcipher;
+ } alg;
+ struct meson_dev *mc;
+#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
+ unsigned long stat_req;
+ unsigned long stat_fb;
+#endif
+};
+
+int meson_enqueue(struct crypto_async_request *areq, u32 type);
+
+int meson_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen);
+int meson_cipher_init(struct crypto_tfm *tfm);
+void meson_cipher_exit(struct crypto_tfm *tfm);
+int meson_skdecrypt(struct skcipher_request *areq);
+int meson_skencrypt(struct skcipher_request *areq);