Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 428 insertions, 0 deletions

diff --git a/drivers/crypto/hisilicon/sec/sec_drv.h b/drivers/crypto/hisilicon/sec/sec_drv.h
new file mode 100644
index 000000000..e2a50bf22
--- /dev/null
+++ b/drivers/crypto/hisilicon/sec/sec_drv.h
@@ -0,0 +1,428 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2016-2017 HiSilicon Limited. */
+
+#ifndef _SEC_DRV_H_
+#define _SEC_DRV_H_
+
+#include <crypto/algapi.h>
+#include <linux/kfifo.h>
+
+#define SEC_MAX_SGE_NUM			64
+#define SEC_HW_RING_NUM			3
+
+#define SEC_CMD_RING			0
+#define SEC_OUTORDER_RING		1
+#define SEC_DBG_RING			2
+
+/* A reasonable length to balance memory use against flexibility */
+#define SEC_QUEUE_LEN			512
+
+#define SEC_MAX_SGE_NUM   64
+
+struct sec_bd_info {
+#define SEC_BD_W0_T_LEN_M			GENMASK(4, 0)
+#define SEC_BD_W0_T_LEN_S			0
+
+#define SEC_BD_W0_C_WIDTH_M			GENMASK(6, 5)
+#define SEC_BD_W0_C_WIDTH_S			5
+#define   SEC_C_WIDTH_AES_128BIT		0
+#define   SEC_C_WIDTH_AES_8BIT		1
+#define   SEC_C_WIDTH_AES_1BIT		2
+#define   SEC_C_WIDTH_DES_64BIT		0
+#define   SEC_C_WIDTH_DES_8BIT		1
+#define   SEC_C_WIDTH_DES_1BIT		2
+
+#define SEC_BD_W0_C_MODE_M			GENMASK(9, 7)
+#define SEC_BD_W0_C_MODE_S			7
+#define   SEC_C_MODE_ECB			0
+#define   SEC_C_MODE_CBC			1
+#define   SEC_C_MODE_CTR			4
+#define   SEC_C_MODE_CCM			5
+#define   SEC_C_MODE_GCM			6
+#define   SEC_C_MODE_XTS			7
+
+#define SEC_BD_W0_SEQ				BIT(10)
+#define SEC_BD_W0_DE				BIT(11)
+#define SEC_BD_W0_DAT_SKIP_M			GENMASK(13, 12)
+#define SEC_BD_W0_DAT_SKIP_S			12
+#define SEC_BD_W0_C_GRAN_SIZE_19_16_M		GENMASK(17, 14)
+#define SEC_BD_W0_C_GRAN_SIZE_19_16_S		14
+
+#define SEC_BD_W0_CIPHER_M			GENMASK(19, 18)
+#define SEC_BD_W0_CIPHER_S			18
+#define   SEC_CIPHER_NULL			0
+#define   SEC_CIPHER_ENCRYPT			1
+#define   SEC_CIPHER_DECRYPT			2
+
+#define SEC_BD_W0_AUTH_M			GENMASK(21, 20)
+#define SEC_BD_W0_AUTH_S			20
+#define   SEC_AUTH_NULL				0
+#define   SEC_AUTH_MAC				1
+#define   SEC_AUTH_VERIF			2
+
+#define SEC_BD_W0_AI_GEN			BIT(22)
+#define SEC_BD_W0_CI_GEN			BIT(23)
+#define SEC_BD_W0_NO_HPAD			BIT(24)
+#define SEC_BD_W0_HM_M				GENMASK(26, 25)
+#define SEC_BD_W0_HM_S				25
+#define SEC_BD_W0_ICV_OR_SKEY_EN_M		GENMASK(28, 27)
+#define SEC_BD_W0_ICV_OR_SKEY_EN_S		27
+
+/* Multi purpose field - gran size bits for send, flag for recv */
+#define SEC_BD_W0_FLAG_M			GENMASK(30, 29)
+#define SEC_BD_W0_C_GRAN_SIZE_21_20_M		GENMASK(30, 29)
+#define SEC_BD_W0_FLAG_S			29
+#define SEC_BD_W0_C_GRAN_SIZE_21_20_S		29
+
+#define SEC_BD_W0_DONE				BIT(31)
+	u32 w0;
+
+#define SEC_BD_W1_AUTH_GRAN_SIZE_M		GENMASK(21, 0)
+#define SEC_BD_W1_AUTH_GRAN_SIZE_S		0
+#define SEC_BD_W1_M_KEY_EN			BIT(22)
+#define SEC_BD_W1_BD_INVALID			BIT(23)
+#define SEC_BD_W1_ADDR_TYPE			BIT(24)
+
+#define SEC_BD_W1_A_ALG_M			GENMASK(28, 25)
+#define SEC_BD_W1_A_ALG_S			25
+#define   SEC_A_ALG_SHA1			0
+#define   SEC_A_ALG_SHA256			1
+#define   SEC_A_ALG_MD5				2
+#define   SEC_A_ALG_SHA224			3
+#define   SEC_A_ALG_HMAC_SHA1			8
+#define   SEC_A_ALG_HMAC_SHA224			10
+#define   SEC_A_ALG_HMAC_SHA256			11
+#define   SEC_A_ALG_HMAC_MD5			12
+#define   SEC_A_ALG_AES_XCBC			13
+#define   SEC_A_ALG_AES_CMAC			14
+
+#define SEC_BD_W1_C_ALG_M			GENMASK(31, 29)
+#define SEC_BD_W1_C_ALG_S			29
+#define   SEC_C_ALG_DES				0
+#define   SEC_C_ALG_3DES			1
+#define   SEC_C_ALG_AES				2
+
+	u32 w1;
+
+#define SEC_BD_W2_C_GRAN_SIZE_15_0_M		GENMASK(15, 0)
+#define SEC_BD_W2_C_GRAN_SIZE_15_0_S		0
+#define SEC_BD_W2_GRAN_NUM_M			GENMASK(31, 16)
+#define SEC_BD_W2_GRAN_NUM_S			16
+	u32 w2;
+
+#define SEC_BD_W3_AUTH_LEN_OFFSET_M		GENMASK(9, 0)
+#define SEC_BD_W3_AUTH_LEN_OFFSET_S		0
+#define SEC_BD_W3_CIPHER_LEN_OFFSET_M		GENMASK(19, 10)
+#define SEC_BD_W3_CIPHER_LEN_OFFSET_S		10
+#define SEC_BD_W3_MAC_LEN_M			GENMASK(24, 20)
+#define SEC_BD_W3_MAC_LEN_S			20
+#define SEC_BD_W3_A_KEY_LEN_M			GENMASK(29, 25)
+#define SEC_BD_W3_A_KEY_LEN_S			25
+#define SEC_BD_W3_C_KEY_LEN_M			GENMASK(31, 30)
+#define SEC_BD_W3_C_KEY_LEN_S			30
+#define   SEC_KEY_LEN_AES_128			0
+#define   SEC_KEY_LEN_AES_192			1
+#define   SEC_KEY_LEN_AES_256			2
+#define   SEC_KEY_LEN_DES			1
+#define   SEC_KEY_LEN_3DES_3_KEY		1
+#define   SEC_KEY_LEN_3DES_2_KEY		3
+	u32 w3;
+
+	/* W4,5 */
+	union {
+		u32 authkey_addr_lo;
+		u32 authiv_addr_lo;
+	};
+	union {
+		u32 authkey_addr_hi;
+		u32 authiv_addr_hi;
+	};
+
+	/* W6,7 */
+	u32 cipher_key_addr_lo;
+	u32 cipher_key_addr_hi;
+
+	/* W8,9 */
+	u32 cipher_iv_addr_lo;
+	u32 cipher_iv_addr_hi;
+
+	/* W10,11 */
+	u32 data_addr_lo;
+	u32 data_addr_hi;
+
+	/* W12,13 */
+	u32 mac_addr_lo;
+	u32 mac_addr_hi;
+
+	/* W14,15 */
+	u32 cipher_destin_addr_lo;
+	u32 cipher_destin_addr_hi;
+};
+
+enum sec_mem_region {
+	SEC_COMMON = 0,
+	SEC_SAA,
+	SEC_NUM_ADDR_REGIONS
+};
+
+#define SEC_NAME_SIZE				64
+#define SEC_Q_NUM				16
+
+
+/**
+ * struct sec_queue_ring_cmd - store information about a SEC HW cmd ring
+ * @used: Local counter used to cheaply establish if the ring is empty.
+ * @lock: Protect against simultaneous adjusting of the read and write pointers.
+ * @vaddr: Virtual address for the ram pages used for the ring.
+ * @paddr: Physical address of the dma mapped region of ram used for the ring.
+ * @callback: Callback function called on a ring element completing.
+ */
+struct sec_queue_ring_cmd {
+	atomic_t used;
+	struct mutex lock;
+	struct sec_bd_info *vaddr;
+	dma_addr_t paddr;
+	void (*callback)(struct sec_bd_info *resp, void *ctx);
+};
+
+struct sec_debug_bd_info;
+struct sec_queue_ring_db {
+	struct sec_debug_bd_info *vaddr;
+	dma_addr_t paddr;
+};
+
+struct sec_out_bd_info;
+struct sec_queue_ring_cq {
+	struct sec_out_bd_info *vaddr;
+	dma_addr_t paddr;
+};
+
+struct sec_dev_info;
+
+enum sec_cipher_alg {
+	SEC_C_DES_ECB_64,
+	SEC_C_DES_CBC_64,
+
+	SEC_C_3DES_ECB_192_3KEY,
+	SEC_C_3DES_ECB_192_2KEY,
+
+	SEC_C_3DES_CBC_192_3KEY,
+	SEC_C_3DES_CBC_192_2KEY,
+
+	SEC_C_AES_ECB_128,
+	SEC_C_AES_ECB_192,
+	SEC_C_AES_ECB_256,
+
+	SEC_C_AES_CBC_128,
+	SEC_C_AES_CBC_192,
+	SEC_C_AES_CBC_256,
+
+	SEC_C_AES_CTR_128,
+	SEC_C_AES_CTR_192,
+	SEC_C_AES_CTR_256,
+
+	SEC_C_AES_XTS_128,
+	SEC_C_AES_XTS_256,
+
+	SEC_C_NULL,
+};
+
+/**
+ * struct sec_alg_tfm_ctx - hardware specific tranformation context
+ * @cipher_alg: Cipher algorithm enabled include encryption mode.
+ * @key: Key storage if required.
+ * @pkey: DMA address for the key storage.
+ * @req_template: Request template to save time on setup.
+ * @queue: The hardware queue associated with this tfm context.
+ * @lock: Protect key and pkey to ensure they are consistent
+ * @auth_buf: Current context buffer for auth operations.
+ * @backlog: The backlog queue used for cases where our buffers aren't
+ * large enough.
+ */
+struct sec_alg_tfm_ctx {
+	enum sec_cipher_alg cipher_alg;
+	u8 *key;
+	dma_addr_t pkey;
+	struct sec_bd_info req_template;
+	struct sec_queue *queue;
+	struct mutex lock;
+	u8 *auth_buf;
+	struct list_head backlog;
+};
+
+/**
+ * struct sec_request - data associate with a single crypto request
+ * @elements: List of subparts of this request (hardware size restriction)
+ * @num_elements: The number of subparts (used as an optimization)
+ * @lock: Protect elements of this structure against concurrent change.
+ * @tfm_ctx: hardware specific context.
+ * @len_in: length of in sgl from upper layers
+ * @len_out: length of out sgl from upper layers
+ * @dma_iv: initialization vector - phsyical address
+ * @err: store used to track errors across subelements of this request.
+ * @req_base: pointer to base element of associate crypto context.
+ * This is needed to allow shared handling skcipher, ahash etc.
+ * @cb: completion callback.
+ * @backlog_head: list head to allow backlog maintenance.
+ *
+ * The hardware is limited in the maximum size of data that it can
+ * process from a single BD.  Typically this is fairly large (32MB)
+ * but still requires the complexity of splitting the incoming
+ * skreq up into a number of elements complete with appropriate
+ * iv chaining.
+ */
+struct sec_request {
+	struct list_head elements;
+	int num_elements;
+	struct mutex lock;
+	struct sec_alg_tfm_ctx *tfm_ctx;
+	int len_in;
+	int len_out;
+	dma_addr_t dma_iv;
+	int err;
+	struct crypto_async_request *req_base;
+	void (*cb)(struct sec_bd_info *resp, struct crypto_async_request *req);
+	struct list_head backlog_head;
+};
+
+/**
+ * struct sec_request_el - A subpart of a request.
+ * @head: allow us to attach this to the list in the sec_request
+ * @req: hardware block descriptor corresponding to this request subpart
+ * @in: hardware sgl for input - virtual address
+ * @dma_in: hardware sgl for input - physical address
+ * @sgl_in: scatterlist for this request subpart
+ * @out: hardware sgl for output - virtual address
+ * @dma_out: hardware sgl for output - physical address
+ * @sgl_out: scatterlist for this request subpart
+ * @sec_req: The request which this subpart forms a part of
+ * @el_length: Number of bytes in this subpart. Needed to locate
+ * last ivsize chunk for iv chaining.
+ */
+struct sec_request_el {
+	struct list_head head;
+	struct sec_bd_info req;
+	struct sec_hw_sgl *in;
+	dma_addr_t dma_in;
+	struct scatterlist *sgl_in;
+	struct sec_hw_sgl *out;
+	dma_addr_t dma_out;
+	struct scatterlist *sgl_out;
+	struct sec_request *sec_req;
+	size_t el_length;
+};
+
+/**
+ * struct sec_queue - All the information about a HW queue
+ * @dev_info: The parent SEC device to which this queue belongs.
+ * @task_irq: Completion interrupt for the queue.
+ * @name: Human readable queue description also used as irq name.
+ * @ring: The several HW rings associated with one queue.
+ * @regs: The iomapped device registers
+ * @queue_id: Index of the queue used for naming and resource selection.
+ * @in_use: Flag to say if the queue is in use.
+ * @expected: The next expected element to finish assuming we were in order.
+ * @uprocessed: A bitmap to track which OoO elements are done but not handled.
+ * @softqueue: A software queue used when chaining requirements prevent direct
+ *   use of the hardware queues.
+ * @havesoftqueue: A flag to say we have a queues - as we may need one for the
+ *   current mode.
+ * @queuelock: Protect the soft queue from concurrent changes to avoid some
+ *   potential loss of data races.
+ * @shadow: Pointers back to the shadow copy of the hardware ring element
+ *   need because we can't store any context reference in the bd element.
+ */
+struct sec_queue {
+	struct sec_dev_info *dev_info;
+	int task_irq;
+	char name[SEC_NAME_SIZE];
+	struct sec_queue_ring_cmd ring_cmd;
+	struct sec_queue_ring_cq ring_cq;
+	struct sec_queue_ring_db ring_db;
+	void __iomem *regs;
+	u32 queue_id;
+	bool in_use;
+	int expected;
+
+	DECLARE_BITMAP(unprocessed, SEC_QUEUE_LEN);
+	DECLARE_KFIFO_PTR(softqueue, typeof(struct sec_request_el *));
+	bool havesoftqueue;
+	spinlock_t queuelock;
+	void *shadow[SEC_QUEUE_LEN];
+};
+
+/**
+ * struct sec_hw_sge: Track each of the 64 element SEC HW SGL entries
+ * @buf: The IOV dma address for this entry.
+ * @len: Length of this IOV.
+ * @pad: Reserved space.
+ */
+struct sec_hw_sge {
+	dma_addr_t buf;
+	unsigned int len;
+	unsigned int pad;
+};
+
+/**
+ * struct sec_hw_sgl: One hardware SGL entry.
+ * @next_sgl: The next entry if we need to chain dma address. Null if last.
+ * @entry_sum_in_chain: The full count of SGEs - only matters for first SGL.
+ * @entry_sum_in_sgl: The number of SGEs in this SGL element.
+ * @flag: Unused in skciphers.
+ * @serial_num: Unsued in skciphers.
+ * @cpuid: Currently unused.
+ * @data_bytes_in_sgl: Count of bytes from all SGEs in this SGL.
+ * @next: Virtual address used to stash the next sgl - useful in completion.
+ * @reserved: A reserved field not currently used.
+ * @sge_entries: The (up to) 64 Scatter Gather Entries, representing IOVs.
+ * @node: Currently unused.
+ */
+struct sec_hw_sgl {
+	dma_addr_t next_sgl;
+	u16 entry_sum_in_chain;
+	u16 entry_sum_in_sgl;
+	u32 flag;
+	u64 serial_num;
+	u32 cpuid;
+	u32 data_bytes_in_sgl;
+	struct sec_hw_sgl *next;
+	u64 reserved;
+	struct sec_hw_sge  sge_entries[SEC_MAX_SGE_NUM];
+	u8 node[16];
+};
+
+struct dma_pool;
+
+/**
+ * struct sec_dev_info: The full SEC unit comprising queues and processors.
+ * @sec_id: Index used to track which SEC this is when more than one is present.
+ * @num_saas: The number of backed processors enabled.
+ * @regs: iomapped register regions shared by whole SEC unit.
+ * @dev_lock: Protects concurrent queue allocation / freeing for the SEC.
+ * @queues: The 16 queues that this SEC instance provides.
+ * @dev: Device pointer.
+ * @hw_sgl_pool: DMA pool used to mimise mapping for the scatter gather lists.
+ */
+struct sec_dev_info {
+	int sec_id;
+	int num_saas;
+	void __iomem *regs[SEC_NUM_ADDR_REGIONS];
+	struct mutex dev_lock;
+	int queues_in_use;
+	struct sec_queue queues[SEC_Q_NUM];
+	struct device *dev;
+	struct dma_pool *hw_sgl_pool;
+};
+
+int sec_queue_send(struct sec_queue *queue, struct sec_bd_info *msg, void *ctx);
+bool sec_queue_can_enqueue(struct sec_queue *queue, int num);
+int sec_queue_stop_release(struct sec_queue *queue);
+struct sec_queue *sec_queue_alloc_start_safe(void);
+bool sec_queue_empty(struct sec_queue *queue);
+
+/* Algorithm specific elements from sec_algs.c */
+void sec_alg_callback(struct sec_bd_info *resp, void *ctx);
+int sec_algs_register(void);
+void sec_algs_unregister(void);
+
+#endif /* _SEC_DRV_H_ */