--- /dev/null
+/*
+ * Driver for ARTPEC-6 crypto block using the kernel asynchronous crypto api.
+ *
+ * Copyright (C) 2014-2017 Axis Communications AB
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/bitfield.h>
+#include <linux/crypto.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/fault-inject.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+
+#include <crypto/aes.h>
+#include <crypto/internal/aead.h>
+#include <crypto/internal/hash.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/sha.h>
+#include <crypto/xts.h>
+
+/* Max length of a line in all cache levels for Artpec SoCs. */
+#define ARTPEC_CACHE_LINE_MAX 32
+
+#define PDMA_OUT_CFG 0x0000
+#define PDMA_OUT_BUF_CFG 0x0004
+#define PDMA_OUT_CMD 0x0008
+#define PDMA_OUT_DESCRQ_PUSH 0x0010
+#define PDMA_OUT_DESCRQ_STAT 0x0014
+
+#define A6_PDMA_IN_CFG 0x0028
+#define A6_PDMA_IN_BUF_CFG 0x002c
+#define A6_PDMA_IN_CMD 0x0030
+#define A6_PDMA_IN_STATQ_PUSH 0x0038
+#define A6_PDMA_IN_DESCRQ_PUSH 0x0044
+#define A6_PDMA_IN_DESCRQ_STAT 0x0048
+#define A6_PDMA_INTR_MASK 0x0068
+#define A6_PDMA_ACK_INTR 0x006c
+#define A6_PDMA_MASKED_INTR 0x0074
+
+#define A7_PDMA_IN_CFG 0x002c
+#define A7_PDMA_IN_BUF_CFG 0x0030
+#define A7_PDMA_IN_CMD 0x0034
+#define A7_PDMA_IN_STATQ_PUSH 0x003c
+#define A7_PDMA_IN_DESCRQ_PUSH 0x0048
+#define A7_PDMA_IN_DESCRQ_STAT 0x004C
+#define A7_PDMA_INTR_MASK 0x006c
+#define A7_PDMA_ACK_INTR 0x0070
+#define A7_PDMA_MASKED_INTR 0x0078
+
+#define PDMA_OUT_CFG_EN BIT(0)
+
+#define PDMA_OUT_BUF_CFG_DATA_BUF_SIZE GENMASK(4, 0)
+#define PDMA_OUT_BUF_CFG_DESCR_BUF_SIZE GENMASK(9, 5)
+
+#define PDMA_OUT_CMD_START BIT(0)
+#define A6_PDMA_OUT_CMD_STOP BIT(3)
+#define A7_PDMA_OUT_CMD_STOP BIT(2)
+
+#define PDMA_OUT_DESCRQ_PUSH_LEN GENMASK(5, 0)
+#define PDMA_OUT_DESCRQ_PUSH_ADDR GENMASK(31, 6)
+
+#define PDMA_OUT_DESCRQ_STAT_LEVEL GENMASK(3, 0)
+#define PDMA_OUT_DESCRQ_STAT_SIZE GENMASK(7, 4)
+
+#define PDMA_IN_CFG_EN BIT(0)
+
+#define PDMA_IN_BUF_CFG_DATA_BUF_SIZE GENMASK(4, 0)
+#define PDMA_IN_BUF_CFG_DESCR_BUF_SIZE GENMASK(9, 5)
+#define PDMA_IN_BUF_CFG_STAT_BUF_SIZE GENMASK(14, 10)
+
+#define PDMA_IN_CMD_START BIT(0)
+#define A6_PDMA_IN_CMD_FLUSH_STAT BIT(2)
+#define A6_PDMA_IN_CMD_STOP BIT(3)
+#define A7_PDMA_IN_CMD_FLUSH_STAT BIT(1)
+#define A7_PDMA_IN_CMD_STOP BIT(2)
+
+#define PDMA_IN_STATQ_PUSH_LEN GENMASK(5, 0)
+#define PDMA_IN_STATQ_PUSH_ADDR GENMASK(31, 6)
+
+#define PDMA_IN_DESCRQ_PUSH_LEN GENMASK(5, 0)
+#define PDMA_IN_DESCRQ_PUSH_ADDR GENMASK(31, 6)
+
+#define PDMA_IN_DESCRQ_STAT_LEVEL GENMASK(3, 0)
+#define PDMA_IN_DESCRQ_STAT_SIZE GENMASK(7, 4)
+
+#define A6_PDMA_INTR_MASK_IN_DATA BIT(2)
+#define A6_PDMA_INTR_MASK_IN_EOP BIT(3)
+#define A6_PDMA_INTR_MASK_IN_EOP_FLUSH BIT(4)
+
+#define A7_PDMA_INTR_MASK_IN_DATA BIT(3)
+#define A7_PDMA_INTR_MASK_IN_EOP BIT(4)
+#define A7_PDMA_INTR_MASK_IN_EOP_FLUSH BIT(5)
+
+#define A6_CRY_MD_OPER GENMASK(19, 16)
+
+#define A6_CRY_MD_HASH_SEL_CTX GENMASK(21, 20)
+#define A6_CRY_MD_HASH_HMAC_FIN BIT(23)
+
+#define A6_CRY_MD_CIPHER_LEN GENMASK(21, 20)
+#define A6_CRY_MD_CIPHER_DECR BIT(22)
+#define A6_CRY_MD_CIPHER_TWEAK BIT(23)
+#define A6_CRY_MD_CIPHER_DSEQ BIT(24)
+
+#define A7_CRY_MD_OPER GENMASK(11, 8)
+
+#define A7_CRY_MD_HASH_SEL_CTX GENMASK(13, 12)
+#define A7_CRY_MD_HASH_HMAC_FIN BIT(15)
+
+#define A7_CRY_MD_CIPHER_LEN GENMASK(13, 12)
+#define A7_CRY_MD_CIPHER_DECR BIT(14)
+#define A7_CRY_MD_CIPHER_TWEAK BIT(15)
+#define A7_CRY_MD_CIPHER_DSEQ BIT(16)
+
+/* DMA metadata constants */
+#define regk_crypto_aes_cbc 0x00000002
+#define regk_crypto_aes_ctr 0x00000003
+#define regk_crypto_aes_ecb 0x00000001
+#define regk_crypto_aes_gcm 0x00000004
+#define regk_crypto_aes_xts 0x00000005
+#define regk_crypto_cache 0x00000002
+#define a6_regk_crypto_dlkey 0x0000000a
+#define a7_regk_crypto_dlkey 0x0000000e
+#define regk_crypto_ext 0x00000001
+#define regk_crypto_hmac_sha1 0x00000007
+#define regk_crypto_hmac_sha256 0x00000009
+#define regk_crypto_hmac_sha384 0x0000000b
+#define regk_crypto_hmac_sha512 0x0000000d
+#define regk_crypto_init 0x00000000
+#define regk_crypto_key_128 0x00000000
+#define regk_crypto_key_192 0x00000001
+#define regk_crypto_key_256 0x00000002
+#define regk_crypto_null 0x00000000
+#define regk_crypto_sha1 0x00000006
+#define regk_crypto_sha256 0x00000008
+#define regk_crypto_sha384 0x0000000a
+#define regk_crypto_sha512 0x0000000c
+
+/* DMA descriptor structures */
+struct pdma_descr_ctrl {
+ unsigned char short_descr : 1;
+ unsigned char pad1 : 1;
+ unsigned char eop : 1;
+ unsigned char intr : 1;
+ unsigned char short_len : 3;
+ unsigned char pad2 : 1;
+} __packed;
+
+struct pdma_data_descr {
+ unsigned int len : 24;
+ unsigned int buf : 32;
+} __packed;
+
+struct pdma_short_descr {
+ unsigned char data[7];
+} __packed;
+
+struct pdma_descr {
+ struct pdma_descr_ctrl ctrl;
+ union {
+ struct pdma_data_descr data;
+ struct pdma_short_descr shrt;
+ };
+};
+
+struct pdma_stat_descr {
+ unsigned char pad1 : 1;
+ unsigned char pad2 : 1;
+ unsigned char eop : 1;
+ unsigned char pad3 : 5;
+ unsigned int len : 24;
+};
+
+/* Each descriptor array can hold max 64 entries */
+#define PDMA_DESCR_COUNT 64
+
+#define MODULE_NAME "Artpec-6 CA"
+
+/* Hash modes (including HMAC variants) */
+#define ARTPEC6_CRYPTO_HASH_SHA1 1
+#define ARTPEC6_CRYPTO_HASH_SHA256 2
+#define ARTPEC6_CRYPTO_HASH_SHA384 3
+#define ARTPEC6_CRYPTO_HASH_SHA512 4
+
+/* Crypto modes */
+#define ARTPEC6_CRYPTO_CIPHER_AES_ECB 1
+#define ARTPEC6_CRYPTO_CIPHER_AES_CBC 2
+#define ARTPEC6_CRYPTO_CIPHER_AES_CTR 3
+#define ARTPEC6_CRYPTO_CIPHER_AES_XTS 5
+
+/* The PDMA is a DMA-engine tightly coupled with a ciphering engine.
+ * It operates on a descriptor array with up to 64 descriptor entries.
+ * The arrays must be 64 byte aligned in memory.
+ *
+ * The ciphering unit has no registers and is completely controlled by
+ * a 4-byte metadata that is inserted at the beginning of each dma packet.
+ *
+ * A dma packet is a sequence of descriptors terminated by setting the .eop
+ * field in the final descriptor of the packet.
+ *
+ * Multiple packets are used for providing context data, key data and
+ * the plain/ciphertext.
+ *
+ * PDMA Descriptors (Array)
+ * +------+------+------+~~+-------+------+----
+ * | 0 | 1 | 2 |~~| 11 EOP| 12 | ....
+ * +--+---+--+---+----+-+~~+-------+----+-+----
+ * | | | | |
+ * | | | | |
+ * __|__ +-------++-------++-------+ +----+
+ * | MD | |Payload||Payload||Payload| | MD |
+ * +-----+ +-------++-------++-------+ +----+
+ */
+
+struct artpec6_crypto_bounce_buffer {
+ struct list_head list;
+ size_t length;
+ struct scatterlist *sg;
+ size_t offset;
+ /* buf is aligned to ARTPEC_CACHE_LINE_MAX and
+ * holds up to ARTPEC_CACHE_LINE_MAX bytes data.
+ */
+ void *buf;
+};
+
+struct artpec6_crypto_dma_map {
+ dma_addr_t dma_addr;
+ size_t size;
+ enum dma_data_direction dir;
+};
+
+struct artpec6_crypto_dma_descriptors {
+ struct pdma_descr out[PDMA_DESCR_COUNT] __aligned(64);
+ struct pdma_descr in[PDMA_DESCR_COUNT] __aligned(64);
+ u32 stat[PDMA_DESCR_COUNT] __aligned(64);
+ struct list_head bounce_buffers;
+ /* Enough maps for all out/in buffers, and all three descr. arrays */
+ struct artpec6_crypto_dma_map maps[PDMA_DESCR_COUNT * 2 + 2];
+ dma_addr_t out_dma_addr;
+ dma_addr_t in_dma_addr;
+ dma_addr_t stat_dma_addr;
+ size_t out_cnt;
+ size_t in_cnt;
+ size_t map_count;
+};
+
+enum artpec6_crypto_variant {
+ ARTPEC6_CRYPTO,
+ ARTPEC7_CRYPTO,
+};
+
+struct artpec6_crypto {
+ void __iomem *base;
+ spinlock_t queue_lock;
+ struct list_head queue; /* waiting for pdma fifo space */
+ struct list_head pending; /* submitted to pdma fifo */
+ struct tasklet_struct task;
+ struct kmem_cache *dma_cache;
+ int pending_count;
+ struct timer_list timer;
+ enum artpec6_crypto_variant variant;
+ void *pad_buffer; /* cache-aligned block padding buffer */
+ void *zero_buffer;
+};
+
+enum artpec6_crypto_hash_flags {
+ HASH_FLAG_INIT_CTX = 2,
+ HASH_FLAG_UPDATE = 4,
+ HASH_FLAG_FINALIZE = 8,
+ HASH_FLAG_HMAC = 16,
+ HASH_FLAG_UPDATE_KEY = 32,
+};
+
+struct artpec6_crypto_req_common {
+ struct list_head list;
+ struct artpec6_crypto_dma_descriptors *dma;
+ struct crypto_async_request *req;
+ void (*complete)(struct crypto_async_request *req);
+ gfp_t gfp_flags;
+};
+
+struct artpec6_hash_request_context {
+ char partial_buffer[SHA512_BLOCK_SIZE];
+ char partial_buffer_out[SHA512_BLOCK_SIZE];
+ char key_buffer[SHA512_BLOCK_SIZE];
+ char pad_buffer[SHA512_BLOCK_SIZE + 32];
+ unsigned char digeststate[SHA512_DIGEST_SIZE];
+ size_t partial_bytes;
+ u64 digcnt;
+ u32 key_md;
+ u32 hash_md;
+ enum artpec6_crypto_hash_flags hash_flags;
+ struct artpec6_crypto_req_common common;
+};
+
+struct artpec6_hash_export_state {
+ char partial_buffer[SHA512_BLOCK_SIZE];
+ unsigned char digeststate[SHA512_DIGEST_SIZE];
+ size_t partial_bytes;
+ u64 digcnt;
+ int oper;
+ unsigned int hash_flags;
+};
+
+struct artpec6_hashalg_context {
+ char hmac_key[SHA512_BLOCK_SIZE];
+ size_t hmac_key_length;
+ struct crypto_shash *child_hash;
+};
+
+struct artpec6_crypto_request_context {
+ u32 cipher_md;
+ bool decrypt;
+ struct artpec6_crypto_req_common common;
+};
+
+struct artpec6_cryptotfm_context {
+ unsigned char aes_key[2*AES_MAX_KEY_SIZE];
+ size_t key_length;
+ u32 key_md;
+ int crypto_type;
+ struct crypto_skcipher *fallback;
+};
+
+struct artpec6_crypto_aead_hw_ctx {
+ __be64 aad_length_bits;
+ __be64 text_length_bits;
+ __u8 J0[AES_BLOCK_SIZE];
+};
+
+struct artpec6_crypto_aead_req_ctx {
+ struct artpec6_crypto_aead_hw_ctx hw_ctx;
+ u32 cipher_md;
+ bool decrypt;
+ struct artpec6_crypto_req_common common;
+ __u8 decryption_tag[AES_BLOCK_SIZE] ____cacheline_aligned;
+};
+
+/* The crypto framework makes it hard to avoid this global. */
+static struct device *artpec6_crypto_dev;
+
+static struct dentry *dbgfs_root;
+
+#ifdef CONFIG_FAULT_INJECTION
+static DECLARE_FAULT_ATTR(artpec6_crypto_fail_status_read);
+static DECLARE_FAULT_ATTR(artpec6_crypto_fail_dma_array_full);
+#endif
+
+enum {
+ ARTPEC6_CRYPTO_PREPARE_HASH_NO_START,
+ ARTPEC6_CRYPTO_PREPARE_HASH_START,
+};
+
+static int artpec6_crypto_prepare_aead(struct aead_request *areq);
+static int artpec6_crypto_prepare_crypto(struct skcipher_request *areq);
+static int artpec6_crypto_prepare_hash(struct ahash_request *areq);
+
+static void
+artpec6_crypto_complete_crypto(struct crypto_async_request *req);
+static void
+artpec6_crypto_complete_cbc_encrypt(struct crypto_async_request *req);
+static void
+artpec6_crypto_complete_cbc_decrypt(struct crypto_async_request *req);
+static void
+artpec6_crypto_complete_aead(struct crypto_async_request *req);
+static void
+artpec6_crypto_complete_hash(struct crypto_async_request *req);
+
+static int
+artpec6_crypto_common_destroy(struct artpec6_crypto_req_common *common);
+
+static void
+artpec6_crypto_start_dma(struct artpec6_crypto_req_common *common);
+
+struct artpec6_crypto_walk {
+ struct scatterlist *sg;
+ size_t offset;
+};
+
+static void artpec6_crypto_walk_init(struct artpec6_crypto_walk *awalk,
+ struct scatterlist *sg)
+{
+ awalk->sg = sg;
+ awalk->offset = 0;
+}
+
+static size_t artpec6_crypto_walk_advance(struct artpec6_crypto_walk *awalk,
+ size_t nbytes)
+{
+ while (nbytes && awalk->sg) {
+ size_t piece;
+
+ WARN_ON(awalk->offset > awalk->sg->length);
+
+ piece = min(nbytes, (size_t)awalk->sg->length - awalk->offset);
+ nbytes -= piece;
+ awalk->offset += piece;
+ if (awalk->offset == awalk->sg->length) {
+ awalk->sg = sg_next(awalk->sg);
+ awalk->offset = 0;
+ }
+
+ }
+
+ return nbytes;
+}
+
+static size_t
+artpec6_crypto_walk_chunklen(const struct artpec6_crypto_walk *awalk)
+{
+ WARN_ON(awalk->sg->length == awalk->offset);
+
+ return awalk->sg->length - awalk->offset;
+}
+
+static dma_addr_t
+artpec6_crypto_walk_chunk_phys(const struct artpec6_crypto_walk *awalk)
+{
+ return sg_phys(awalk->sg) + awalk->offset;
+}
+
+static void
+artpec6_crypto_copy_bounce_buffers(struct artpec6_crypto_req_common *common)
+{
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+ struct artpec6_crypto_bounce_buffer *b;
+ struct artpec6_crypto_bounce_buffer *next;
+
+ list_for_each_entry_safe(b, next, &dma->bounce_buffers, list) {
+ pr_debug("bounce entry %p: %zu bytes @ %zu from %p\n",
+ b, b->length, b->offset, b->buf);
+ sg_pcopy_from_buffer(b->sg,
+ 1,
+ b->buf,
+ b->length,
+ b->offset);
+
+ list_del(&b->list);
+ kfree(b);
+ }
+}
+
+static inline bool artpec6_crypto_busy(void)
+{
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+ int fifo_count = ac->pending_count;
+
+ return fifo_count > 6;
+}
+
+static int artpec6_crypto_submit(struct artpec6_crypto_req_common *req)
+{
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+ int ret = -EBUSY;
+
+ spin_lock_bh(&ac->queue_lock);
+
+ if (!artpec6_crypto_busy()) {
+ list_add_tail(&req->list, &ac->pending);
+ artpec6_crypto_start_dma(req);
+ ret = -EINPROGRESS;
+ } else if (req->req->flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
+ list_add_tail(&req->list, &ac->queue);
+ } else {
+ artpec6_crypto_common_destroy(req);
+ }
+
+ spin_unlock_bh(&ac->queue_lock);
+
+ return ret;
+}
+
+static void artpec6_crypto_start_dma(struct artpec6_crypto_req_common *common)
+{
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+ enum artpec6_crypto_variant variant = ac->variant;
+ void __iomem *base = ac->base;
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+ u32 ind, statd, outd;
+
+ /* Make descriptor content visible to the DMA before starting it. */
+ wmb();
+
+ ind = FIELD_PREP(PDMA_IN_DESCRQ_PUSH_LEN, dma->in_cnt - 1) |
+ FIELD_PREP(PDMA_IN_DESCRQ_PUSH_ADDR, dma->in_dma_addr >> 6);
+
+ statd = FIELD_PREP(PDMA_IN_STATQ_PUSH_LEN, dma->in_cnt - 1) |
+ FIELD_PREP(PDMA_IN_STATQ_PUSH_ADDR, dma->stat_dma_addr >> 6);
+
+ outd = FIELD_PREP(PDMA_OUT_DESCRQ_PUSH_LEN, dma->out_cnt - 1) |
+ FIELD_PREP(PDMA_OUT_DESCRQ_PUSH_ADDR, dma->out_dma_addr >> 6);
+
+ if (variant == ARTPEC6_CRYPTO) {
+ writel_relaxed(ind, base + A6_PDMA_IN_DESCRQ_PUSH);
+ writel_relaxed(statd, base + A6_PDMA_IN_STATQ_PUSH);
+ writel_relaxed(PDMA_IN_CMD_START, base + A6_PDMA_IN_CMD);
+ } else {
+ writel_relaxed(ind, base + A7_PDMA_IN_DESCRQ_PUSH);
+ writel_relaxed(statd, base + A7_PDMA_IN_STATQ_PUSH);
+ writel_relaxed(PDMA_IN_CMD_START, base + A7_PDMA_IN_CMD);
+ }
+
+ writel_relaxed(outd, base + PDMA_OUT_DESCRQ_PUSH);
+ writel_relaxed(PDMA_OUT_CMD_START, base + PDMA_OUT_CMD);
+
+ ac->pending_count++;
+}
+
+static void
+artpec6_crypto_init_dma_operation(struct artpec6_crypto_req_common *common)
+{
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+
+ dma->out_cnt = 0;
+ dma->in_cnt = 0;
+ dma->map_count = 0;
+ INIT_LIST_HEAD(&dma->bounce_buffers);
+}
+
+static bool fault_inject_dma_descr(void)
+{
+#ifdef CONFIG_FAULT_INJECTION
+ return should_fail(&artpec6_crypto_fail_dma_array_full, 1);
+#else
+ return false;
+#endif
+}
+
+/** artpec6_crypto_setup_out_descr_phys - Setup an out channel with a
+ * physical address
+ *
+ * @addr: The physical address of the data buffer
+ * @len: The length of the data buffer
+ * @eop: True if this is the last buffer in the packet
+ *
+ * @return 0 on success or -ENOSPC if there are no more descriptors available
+ */
+static int
+artpec6_crypto_setup_out_descr_phys(struct artpec6_crypto_req_common *common,
+ dma_addr_t addr, size_t len, bool eop)
+{
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+ struct pdma_descr *d;
+
+ if (dma->out_cnt >= PDMA_DESCR_COUNT ||
+ fault_inject_dma_descr()) {
+ pr_err("No free OUT DMA descriptors available!\n");
+ return -ENOSPC;
+ }
+
+ d = &dma->out[dma->out_cnt++];
+ memset(d, 0, sizeof(*d));
+
+ d->ctrl.short_descr = 0;
+ d->ctrl.eop = eop;
+ d->data.len = len;
+ d->data.buf = addr;
+ return 0;
+}
+
+/** artpec6_crypto_setup_out_descr_short - Setup a short out descriptor
+ *
+ * @dst: The virtual address of the data
+ * @len: The length of the data, must be between 1 to 7 bytes
+ * @eop: True if this is the last buffer in the packet
+ *
+ * @return 0 on success
+ * -ENOSPC if no more descriptors are available
+ * -EINVAL if the data length exceeds 7 bytes
+ */
+static int
+artpec6_crypto_setup_out_descr_short(struct artpec6_crypto_req_common *common,
+ void *dst, unsigned int len, bool eop)
+{
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+ struct pdma_descr *d;
+
+ if (dma->out_cnt >= PDMA_DESCR_COUNT ||
+ fault_inject_dma_descr()) {
+ pr_err("No free OUT DMA descriptors available!\n");
+ return -ENOSPC;
+ } else if (len > 7 || len < 1) {
+ return -EINVAL;
+ }
+ d = &dma->out[dma->out_cnt++];
+ memset(d, 0, sizeof(*d));
+
+ d->ctrl.short_descr = 1;
+ d->ctrl.short_len = len;
+ d->ctrl.eop = eop;
+ memcpy(d->shrt.data, dst, len);
+ return 0;
+}
+
+static int artpec6_crypto_dma_map_page(struct artpec6_crypto_req_common *common,
+ struct page *page, size_t offset,
+ size_t size,
+ enum dma_data_direction dir,
+ dma_addr_t *dma_addr_out)
+{
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+ struct device *dev = artpec6_crypto_dev;
+ struct artpec6_crypto_dma_map *map;
+ dma_addr_t dma_addr;
+
+ *dma_addr_out = 0;
+
+ if (dma->map_count >= ARRAY_SIZE(dma->maps))
+ return -ENOMEM;
+
+ dma_addr = dma_map_page(dev, page, offset, size, dir);
+ if (dma_mapping_error(dev, dma_addr))
+ return -ENOMEM;
+
+ map = &dma->maps[dma->map_count++];
+ map->size = size;
+ map->dma_addr = dma_addr;
+ map->dir = dir;
+
+ *dma_addr_out = dma_addr;
+
+ return 0;
+}
+
+static int
+artpec6_crypto_dma_map_single(struct artpec6_crypto_req_common *common,
+ void *ptr, size_t size,
+ enum dma_data_direction dir,
+ dma_addr_t *dma_addr_out)
+{
+ struct page *page = virt_to_page(ptr);
+ size_t offset = (uintptr_t)ptr & ~PAGE_MASK;
+
+ return artpec6_crypto_dma_map_page(common, page, offset, size, dir,
+ dma_addr_out);
+}
+
+static int
+artpec6_crypto_dma_map_descs(struct artpec6_crypto_req_common *common)
+{
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+ int ret;
+
+ ret = artpec6_crypto_dma_map_single(common, dma->in,
+ sizeof(dma->in[0]) * dma->in_cnt,
+ DMA_TO_DEVICE, &dma->in_dma_addr);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_dma_map_single(common, dma->out,
+ sizeof(dma->out[0]) * dma->out_cnt,
+ DMA_TO_DEVICE, &dma->out_dma_addr);
+ if (ret)
+ return ret;
+
+ /* We only read one stat descriptor */
+ dma->stat[dma->in_cnt - 1] = 0;
+
+ /*
+ * DMA_BIDIRECTIONAL since we need our zeroing of the stat descriptor
+ * to be written.
+ */
+ return artpec6_crypto_dma_map_single(common,
+ dma->stat + dma->in_cnt - 1,
+ sizeof(dma->stat[0]),
+ DMA_BIDIRECTIONAL,
+ &dma->stat_dma_addr);
+}
+
+static void
+artpec6_crypto_dma_unmap_all(struct artpec6_crypto_req_common *common)
+{
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+ struct device *dev = artpec6_crypto_dev;
+ int i;
+
+ for (i = 0; i < dma->map_count; i++) {
+ struct artpec6_crypto_dma_map *map = &dma->maps[i];
+
+ dma_unmap_page(dev, map->dma_addr, map->size, map->dir);
+ }
+
+ dma->map_count = 0;
+}
+
+/** artpec6_crypto_setup_out_descr - Setup an out descriptor
+ *
+ * @dst: The virtual address of the data
+ * @len: The length of the data
+ * @eop: True if this is the last buffer in the packet
+ * @use_short: If this is true and the data length is 7 bytes or less then
+ * a short descriptor will be used
+ *
+ * @return 0 on success
+ * Any errors from artpec6_crypto_setup_out_descr_short() or
+ * setup_out_descr_phys()
+ */
+static int
+artpec6_crypto_setup_out_descr(struct artpec6_crypto_req_common *common,
+ void *dst, unsigned int len, bool eop,
+ bool use_short)
+{
+ if (use_short && len < 7) {
+ return artpec6_crypto_setup_out_descr_short(common, dst, len,
+ eop);
+ } else {
+ int ret;
+ dma_addr_t dma_addr;
+
+ ret = artpec6_crypto_dma_map_single(common, dst, len,
+ DMA_TO_DEVICE,
+ &dma_addr);
+ if (ret)
+ return ret;
+
+ return artpec6_crypto_setup_out_descr_phys(common, dma_addr,
+ len, eop);
+ }
+}
+
+/** artpec6_crypto_setup_in_descr_phys - Setup an in channel with a
+ * physical address
+ *
+ * @addr: The physical address of the data buffer
+ * @len: The length of the data buffer
+ * @intr: True if an interrupt should be fired after HW processing of this
+ * descriptor
+ *
+ */
+static int
+artpec6_crypto_setup_in_descr_phys(struct artpec6_crypto_req_common *common,
+ dma_addr_t addr, unsigned int len, bool intr)
+{
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+ struct pdma_descr *d;
+
+ if (dma->in_cnt >= PDMA_DESCR_COUNT ||
+ fault_inject_dma_descr()) {
+ pr_err("No free IN DMA descriptors available!\n");
+ return -ENOSPC;
+ }
+ d = &dma->in[dma->in_cnt++];
+ memset(d, 0, sizeof(*d));
+
+ d->ctrl.intr = intr;
+ d->data.len = len;
+ d->data.buf = addr;
+ return 0;
+}
+
+/** artpec6_crypto_setup_in_descr - Setup an in channel descriptor
+ *
+ * @buffer: The virtual address to of the data buffer
+ * @len: The length of the data buffer
+ * @last: If this is the last data buffer in the request (i.e. an interrupt
+ * is needed
+ *
+ * Short descriptors are not used for the in channel
+ */
+static int
+artpec6_crypto_setup_in_descr(struct artpec6_crypto_req_common *common,
+ void *buffer, unsigned int len, bool last)
+{
+ dma_addr_t dma_addr;
+ int ret;
+
+ ret = artpec6_crypto_dma_map_single(common, buffer, len,
+ DMA_FROM_DEVICE, &dma_addr);
+ if (ret)
+ return ret;
+
+ return artpec6_crypto_setup_in_descr_phys(common, dma_addr, len, last);
+}
+
+static struct artpec6_crypto_bounce_buffer *
+artpec6_crypto_alloc_bounce(gfp_t flags)
+{
+ void *base;
+ size_t alloc_size = sizeof(struct artpec6_crypto_bounce_buffer) +
+ 2 * ARTPEC_CACHE_LINE_MAX;
+ struct artpec6_crypto_bounce_buffer *bbuf = kzalloc(alloc_size, flags);
+
+ if (!bbuf)
+ return NULL;
+
+ base = bbuf + 1;
+ bbuf->buf = PTR_ALIGN(base, ARTPEC_CACHE_LINE_MAX);
+ return bbuf;
+}
+
+static int setup_bounce_buffer_in(struct artpec6_crypto_req_common *common,
+ struct artpec6_crypto_walk *walk, size_t size)
+{
+ struct artpec6_crypto_bounce_buffer *bbuf;
+ int ret;
+
+ bbuf = artpec6_crypto_alloc_bounce(common->gfp_flags);
+ if (!bbuf)
+ return -ENOMEM;
+
+ bbuf->length = size;
+ bbuf->sg = walk->sg;
+ bbuf->offset = walk->offset;
+
+ ret = artpec6_crypto_setup_in_descr(common, bbuf->buf, size, false);
+ if (ret) {
+ kfree(bbuf);
+ return ret;
+ }
+
+ pr_debug("BOUNCE %zu offset %zu\n", size, walk->offset);
+ list_add_tail(&bbuf->list, &common->dma->bounce_buffers);
+ return 0;
+}
+
+static int
+artpec6_crypto_setup_sg_descrs_in(struct artpec6_crypto_req_common *common,
+ struct artpec6_crypto_walk *walk,
+ size_t count)
+{
+ size_t chunk;
+ int ret;
+ dma_addr_t addr;
+
+ while (walk->sg && count) {
+ chunk = min(count, artpec6_crypto_walk_chunklen(walk));
+ addr = artpec6_crypto_walk_chunk_phys(walk);
+
+ /* When destination buffers are not aligned to the cache line
+ * size we need bounce buffers. The DMA-API requires that the
+ * entire line is owned by the DMA buffer and this holds also
+ * for the case when coherent DMA is used.
+ */
+ if (!IS_ALIGNED(addr, ARTPEC_CACHE_LINE_MAX)) {
+ chunk = min_t(dma_addr_t, chunk,
+ ALIGN(addr, ARTPEC_CACHE_LINE_MAX) -
+ addr);
+
+ pr_debug("CHUNK-b %pad:%zu\n", &addr, chunk);
+ ret = setup_bounce_buffer_in(common, walk, chunk);
+ } else if (chunk < ARTPEC_CACHE_LINE_MAX) {
+ pr_debug("CHUNK-b %pad:%zu\n", &addr, chunk);
+ ret = setup_bounce_buffer_in(common, walk, chunk);
+ } else {
+ dma_addr_t dma_addr;
+
+ chunk = chunk & ~(ARTPEC_CACHE_LINE_MAX-1);
+
+ pr_debug("CHUNK %pad:%zu\n", &addr, chunk);
+
+ ret = artpec6_crypto_dma_map_page(common,
+ sg_page(walk->sg),
+ walk->sg->offset +
+ walk->offset,
+ chunk,
+ DMA_FROM_DEVICE,
+ &dma_addr);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_setup_in_descr_phys(common,
+ dma_addr,
+ chunk, false);
+ }
+
+ if (ret)
+ return ret;
+
+ count = count - chunk;
+ artpec6_crypto_walk_advance(walk, chunk);
+ }
+
+ if (count)
+ pr_err("EOL unexpected %zu bytes left\n", count);
+
+ return count ? -EINVAL : 0;
+}
+
+static int
+artpec6_crypto_setup_sg_descrs_out(struct artpec6_crypto_req_common *common,
+ struct artpec6_crypto_walk *walk,
+ size_t count)
+{
+ size_t chunk;
+ int ret;
+ dma_addr_t addr;
+
+ while (walk->sg && count) {
+ chunk = min(count, artpec6_crypto_walk_chunklen(walk));
+ addr = artpec6_crypto_walk_chunk_phys(walk);
+
+ pr_debug("OUT-CHUNK %pad:%zu\n", &addr, chunk);
+
+ if (addr & 3) {
+ char buf[3];
+
+ chunk = min_t(size_t, chunk, (4-(addr&3)));
+
+ sg_pcopy_to_buffer(walk->sg, 1, buf, chunk,
+ walk->offset);
+
+ ret = artpec6_crypto_setup_out_descr_short(common, buf,
+ chunk,
+ false);
+ } else {
+ dma_addr_t dma_addr;
+
+ ret = artpec6_crypto_dma_map_page(common,
+ sg_page(walk->sg),
+ walk->sg->offset +
+ walk->offset,
+ chunk,
+ DMA_TO_DEVICE,
+ &dma_addr);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_setup_out_descr_phys(common,
+ dma_addr,
+ chunk, false);
+ }
+
+ if (ret)
+ return ret;
+
+ count = count - chunk;
+ artpec6_crypto_walk_advance(walk, chunk);
+ }
+
+ if (count)
+ pr_err("EOL unexpected %zu bytes left\n", count);
+
+ return count ? -EINVAL : 0;
+}
+
+
+/** artpec6_crypto_terminate_out_descrs - Set the EOP on the last out descriptor
+ *
+ * If the out descriptor list is non-empty, then the eop flag on the
+ * last used out descriptor will be set.
+ *
+ * @return 0 on success
+ * -EINVAL if the out descriptor is empty or has overflown
+ */
+static int
+artpec6_crypto_terminate_out_descrs(struct artpec6_crypto_req_common *common)
+{
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+ struct pdma_descr *d;
+
+ if (!dma->out_cnt || dma->out_cnt > PDMA_DESCR_COUNT) {
+ pr_err("%s: OUT descriptor list is %s\n",
+ MODULE_NAME, dma->out_cnt ? "empty" : "full");
+ return -EINVAL;
+
+ }
+
+ d = &dma->out[dma->out_cnt-1];
+ d->ctrl.eop = 1;
+
+ return 0;
+}
+
+/** artpec6_crypto_terminate_in_descrs - Set the interrupt flag on the last
+ * in descriptor
+ *
+ * See artpec6_crypto_terminate_out_descrs() for return values
+ */
+static int
+artpec6_crypto_terminate_in_descrs(struct artpec6_crypto_req_common *common)
+{
+ struct artpec6_crypto_dma_descriptors *dma = common->dma;
+ struct pdma_descr *d;
+
+ if (!dma->in_cnt || dma->in_cnt > PDMA_DESCR_COUNT) {
+ pr_err("%s: IN descriptor list is %s\n",
+ MODULE_NAME, dma->in_cnt ? "empty" : "full");
+ return -EINVAL;
+ }
+
+ d = &dma->in[dma->in_cnt-1];
+ d->ctrl.intr = 1;
+ return 0;
+}
+
+/** create_hash_pad - Create a Secure Hash conformant pad
+ *
+ * @dst: The destination buffer to write the pad. Must be at least 64 bytes
+ * @dgstlen: The total length of the hash digest in bytes
+ * @bitcount: The total length of the digest in bits
+ *
+ * @return The total number of padding bytes written to @dst
+ */
+static size_t
+create_hash_pad(int oper, unsigned char *dst, u64 dgstlen, u64 bitcount)
+{
+ unsigned int mod, target, diff, pad_bytes, size_bytes;
+ __be64 bits = __cpu_to_be64(bitcount);
+
+ switch (oper) {
+ case regk_crypto_sha1:
+ case regk_crypto_sha256:
+ case regk_crypto_hmac_sha1:
+ case regk_crypto_hmac_sha256:
+ target = 448 / 8;
+ mod = 512 / 8;
+ size_bytes = 8;
+ break;
+ default:
+ target = 896 / 8;
+ mod = 1024 / 8;
+ size_bytes = 16;
+ break;
+ }
+
+ target -= 1;
+ diff = dgstlen & (mod - 1);
+ pad_bytes = diff > target ? target + mod - diff : target - diff;
+
+ memset(dst + 1, 0, pad_bytes);
+ dst[0] = 0x80;
+
+ if (size_bytes == 16) {
+ memset(dst + 1 + pad_bytes, 0, 8);
+ memcpy(dst + 1 + pad_bytes + 8, &bits, 8);
+ } else {
+ memcpy(dst + 1 + pad_bytes, &bits, 8);
+ }
+
+ return pad_bytes + size_bytes + 1;
+}
+
+static int artpec6_crypto_common_init(struct artpec6_crypto_req_common *common,
+ struct crypto_async_request *parent,
+ void (*complete)(struct crypto_async_request *req),
+ struct scatterlist *dstsg, unsigned int nbytes)
+{
+ gfp_t flags;
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+
+ flags = (parent->flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
+ GFP_KERNEL : GFP_ATOMIC;
+
+ common->gfp_flags = flags;
+ common->dma = kmem_cache_alloc(ac->dma_cache, flags);
+ if (!common->dma)
+ return -ENOMEM;
+
+ common->req = parent;
+ common->complete = complete;
+ return 0;
+}
+
+static void
+artpec6_crypto_bounce_destroy(struct artpec6_crypto_dma_descriptors *dma)
+{
+ struct artpec6_crypto_bounce_buffer *b;
+ struct artpec6_crypto_bounce_buffer *next;
+
+ list_for_each_entry_safe(b, next, &dma->bounce_buffers, list) {
+ kfree(b);
+ }
+}
+
+static int
+artpec6_crypto_common_destroy(struct artpec6_crypto_req_common *common)
+{
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+
+ artpec6_crypto_dma_unmap_all(common);
+ artpec6_crypto_bounce_destroy(common->dma);
+ kmem_cache_free(ac->dma_cache, common->dma);
+ common->dma = NULL;
+ return 0;
+}
+
+/*
+ * Ciphering functions.
+ */
+static int artpec6_crypto_encrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
+ struct artpec6_cryptotfm_context *ctx = crypto_skcipher_ctx(cipher);
+ struct artpec6_crypto_request_context *req_ctx = NULL;
+ void (*complete)(struct crypto_async_request *req);
+ int ret;
+
+ req_ctx = skcipher_request_ctx(req);
+
+ switch (ctx->crypto_type) {
+ case ARTPEC6_CRYPTO_CIPHER_AES_CBC:
+ case ARTPEC6_CRYPTO_CIPHER_AES_ECB:
+ case ARTPEC6_CRYPTO_CIPHER_AES_XTS:
+ req_ctx->decrypt = 0;
+ break;
+ default:
+ break;
+ }
+
+ switch (ctx->crypto_type) {
+ case ARTPEC6_CRYPTO_CIPHER_AES_CBC:
+ complete = artpec6_crypto_complete_cbc_encrypt;
+ break;
+ default:
+ complete = artpec6_crypto_complete_crypto;
+ break;
+ }
+
+ ret = artpec6_crypto_common_init(&req_ctx->common,
+ &req->base,
+ complete,
+ req->dst, req->cryptlen);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_prepare_crypto(req);
+ if (ret) {
+ artpec6_crypto_common_destroy(&req_ctx->common);
+ return ret;
+ }
+
+ return artpec6_crypto_submit(&req_ctx->common);
+}
+
+static int artpec6_crypto_decrypt(struct skcipher_request *req)
+{
+ int ret;
+ struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
+ struct artpec6_cryptotfm_context *ctx = crypto_skcipher_ctx(cipher);
+ struct artpec6_crypto_request_context *req_ctx = NULL;
+ void (*complete)(struct crypto_async_request *req);
+
+ req_ctx = skcipher_request_ctx(req);
+
+ switch (ctx->crypto_type) {
+ case ARTPEC6_CRYPTO_CIPHER_AES_CBC:
+ case ARTPEC6_CRYPTO_CIPHER_AES_ECB:
+ case ARTPEC6_CRYPTO_CIPHER_AES_XTS:
+ req_ctx->decrypt = 1;
+ break;
+ default:
+ break;
+ }
+
+
+ switch (ctx->crypto_type) {
+ case ARTPEC6_CRYPTO_CIPHER_AES_CBC:
+ complete = artpec6_crypto_complete_cbc_decrypt;
+ break;
+ default:
+ complete = artpec6_crypto_complete_crypto;
+ break;
+ }
+
+ ret = artpec6_crypto_common_init(&req_ctx->common, &req->base,
+ complete,
+ req->dst, req->cryptlen);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_prepare_crypto(req);
+ if (ret) {
+ artpec6_crypto_common_destroy(&req_ctx->common);
+ return ret;
+ }
+
+ return artpec6_crypto_submit(&req_ctx->common);
+}
+
+static int
+artpec6_crypto_ctr_crypt(struct skcipher_request *req, bool encrypt)
+{
+ struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
+ struct artpec6_cryptotfm_context *ctx = crypto_skcipher_ctx(cipher);
+ size_t iv_len = crypto_skcipher_ivsize(cipher);
+ unsigned int counter = be32_to_cpup((__be32 *)
+ (req->iv + iv_len - 4));
+ unsigned int nblks = ALIGN(req->cryptlen, AES_BLOCK_SIZE) /
+ AES_BLOCK_SIZE;
+
+ /*
+ * The hardware uses only the last 32-bits as the counter while the
+ * kernel tests (aes_ctr_enc_tv_template[4] for example) expect that
+ * the whole IV is a counter. So fallback if the counter is going to
+ * overlow.
+ */
+ if (counter + nblks < counter) {
+ int ret;
+
+ pr_debug("counter %x will overflow (nblks %u), falling back\n",
+ counter, counter + nblks);
+
+ ret = crypto_skcipher_setkey(ctx->fallback, ctx->aes_key,
+ ctx->key_length);
+ if (ret)
+ return ret;
+
+ {
+ SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
+
+ skcipher_request_set_tfm(subreq, ctx->fallback);
+ skcipher_request_set_callback(subreq, req->base.flags,
+ NULL, NULL);
+ skcipher_request_set_crypt(subreq, req->src, req->dst,
+ req->cryptlen, req->iv);
+ ret = encrypt ? crypto_skcipher_encrypt(subreq)
+ : crypto_skcipher_decrypt(subreq);
+ skcipher_request_zero(subreq);
+ }
+ return ret;
+ }
+
+ return encrypt ? artpec6_crypto_encrypt(req)
+ : artpec6_crypto_decrypt(req);
+}
+
+static int artpec6_crypto_ctr_encrypt(struct skcipher_request *req)
+{
+ return artpec6_crypto_ctr_crypt(req, true);
+}
+
+static int artpec6_crypto_ctr_decrypt(struct skcipher_request *req)
+{
+ return artpec6_crypto_ctr_crypt(req, false);
+}
+
+/*
+ * AEAD functions
+ */
+static int artpec6_crypto_aead_init(struct crypto_aead *tfm)
+{
+ struct artpec6_cryptotfm_context *tfm_ctx = crypto_aead_ctx(tfm);
+
+ memset(tfm_ctx, 0, sizeof(*tfm_ctx));
+
+ crypto_aead_set_reqsize(tfm,
+ sizeof(struct artpec6_crypto_aead_req_ctx));
+
+ return 0;
+}
+
+static int artpec6_crypto_aead_set_key(struct crypto_aead *tfm, const u8 *key,
+ unsigned int len)
+{
+ struct artpec6_cryptotfm_context *ctx = crypto_tfm_ctx(&tfm->base);
+
+ if (len != 16 && len != 24 && len != 32) {
+ crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -1;
+ }
+
+ ctx->key_length = len;
+
+ memcpy(ctx->aes_key, key, len);
+ return 0;
+}
+
+static int artpec6_crypto_aead_encrypt(struct aead_request *req)
+{
+ int ret;
+ struct artpec6_crypto_aead_req_ctx *req_ctx = aead_request_ctx(req);
+
+ req_ctx->decrypt = false;
+ ret = artpec6_crypto_common_init(&req_ctx->common, &req->base,
+ artpec6_crypto_complete_aead,
+ NULL, 0);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_prepare_aead(req);
+ if (ret) {
+ artpec6_crypto_common_destroy(&req_ctx->common);
+ return ret;
+ }
+
+ return artpec6_crypto_submit(&req_ctx->common);
+}
+
+static int artpec6_crypto_aead_decrypt(struct aead_request *req)
+{
+ int ret;
+ struct artpec6_crypto_aead_req_ctx *req_ctx = aead_request_ctx(req);
+
+ req_ctx->decrypt = true;
+ if (req->cryptlen < AES_BLOCK_SIZE)
+ return -EINVAL;
+
+ ret = artpec6_crypto_common_init(&req_ctx->common,
+ &req->base,
+ artpec6_crypto_complete_aead,
+ NULL, 0);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_prepare_aead(req);
+ if (ret) {
+ artpec6_crypto_common_destroy(&req_ctx->common);
+ return ret;
+ }
+
+ return artpec6_crypto_submit(&req_ctx->common);
+}
+
+static int artpec6_crypto_prepare_hash(struct ahash_request *areq)
+{
+ struct artpec6_hashalg_context *ctx = crypto_tfm_ctx(areq->base.tfm);
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(areq);
+ size_t digestsize = crypto_ahash_digestsize(crypto_ahash_reqtfm(areq));
+ size_t contextsize = digestsize == SHA384_DIGEST_SIZE ?
+ SHA512_DIGEST_SIZE : digestsize;
+ size_t blocksize = crypto_tfm_alg_blocksize(
+ crypto_ahash_tfm(crypto_ahash_reqtfm(areq)));
+ struct artpec6_crypto_req_common *common = &req_ctx->common;
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+ enum artpec6_crypto_variant variant = ac->variant;
+ u32 sel_ctx;
+ bool ext_ctx = false;
+ bool run_hw = false;
+ int error = 0;
+
+ artpec6_crypto_init_dma_operation(common);
+
+ /* Upload HMAC key, must be first the first packet */
+ if (req_ctx->hash_flags & HASH_FLAG_HMAC) {
+ if (variant == ARTPEC6_CRYPTO) {
+ req_ctx->key_md = FIELD_PREP(A6_CRY_MD_OPER,
+ a6_regk_crypto_dlkey);
+ } else {
+ req_ctx->key_md = FIELD_PREP(A7_CRY_MD_OPER,
+ a7_regk_crypto_dlkey);
+ }
+
+ /* Copy and pad up the key */
+ memcpy(req_ctx->key_buffer, ctx->hmac_key,
+ ctx->hmac_key_length);
+ memset(req_ctx->key_buffer + ctx->hmac_key_length, 0,
+ blocksize - ctx->hmac_key_length);
+
+ error = artpec6_crypto_setup_out_descr(common,
+ (void *)&req_ctx->key_md,
+ sizeof(req_ctx->key_md), false, false);
+ if (error)
+ return error;
+
+ error = artpec6_crypto_setup_out_descr(common,
+ req_ctx->key_buffer, blocksize,
+ true, false);
+ if (error)
+ return error;
+ }
+
+ if (!(req_ctx->hash_flags & HASH_FLAG_INIT_CTX)) {
+ /* Restore context */
+ sel_ctx = regk_crypto_ext;
+ ext_ctx = true;
+ } else {
+ sel_ctx = regk_crypto_init;
+ }
+
+ if (variant == ARTPEC6_CRYPTO) {
+ req_ctx->hash_md &= ~A6_CRY_MD_HASH_SEL_CTX;
+ req_ctx->hash_md |= FIELD_PREP(A6_CRY_MD_HASH_SEL_CTX, sel_ctx);
+
+ /* If this is the final round, set the final flag */
+ if (req_ctx->hash_flags & HASH_FLAG_FINALIZE)
+ req_ctx->hash_md |= A6_CRY_MD_HASH_HMAC_FIN;
+ } else {
+ req_ctx->hash_md &= ~A7_CRY_MD_HASH_SEL_CTX;
+ req_ctx->hash_md |= FIELD_PREP(A7_CRY_MD_HASH_SEL_CTX, sel_ctx);
+
+ /* If this is the final round, set the final flag */
+ if (req_ctx->hash_flags & HASH_FLAG_FINALIZE)
+ req_ctx->hash_md |= A7_CRY_MD_HASH_HMAC_FIN;
+ }
+
+ /* Setup up metadata descriptors */
+ error = artpec6_crypto_setup_out_descr(common,
+ (void *)&req_ctx->hash_md,
+ sizeof(req_ctx->hash_md), false, false);
+ if (error)
+ return error;
+
+ error = artpec6_crypto_setup_in_descr(common, ac->pad_buffer, 4, false);
+ if (error)
+ return error;
+
+ if (ext_ctx) {
+ error = artpec6_crypto_setup_out_descr(common,
+ req_ctx->digeststate,
+ contextsize, false, false);
+
+ if (error)
+ return error;
+ }
+
+ if (req_ctx->hash_flags & HASH_FLAG_UPDATE) {
+ size_t done_bytes = 0;
+ size_t total_bytes = areq->nbytes + req_ctx->partial_bytes;
+ size_t ready_bytes = round_down(total_bytes, blocksize);
+ struct artpec6_crypto_walk walk;
+
+ run_hw = ready_bytes > 0;
+ if (req_ctx->partial_bytes && ready_bytes) {
+ /* We have a partial buffer and will at least some bytes
+ * to the HW. Empty this partial buffer before tackling
+ * the SG lists
+ */
+ memcpy(req_ctx->partial_buffer_out,
+ req_ctx->partial_buffer,
+ req_ctx->partial_bytes);
+
+ error = artpec6_crypto_setup_out_descr(common,
+ req_ctx->partial_buffer_out,
+ req_ctx->partial_bytes,
+ false, true);
+ if (error)
+ return error;
+
+ /* Reset partial buffer */
+ done_bytes += req_ctx->partial_bytes;
+ req_ctx->partial_bytes = 0;
+ }
+
+ artpec6_crypto_walk_init(&walk, areq->src);
+
+ error = artpec6_crypto_setup_sg_descrs_out(common, &walk,
+ ready_bytes -
+ done_bytes);
+ if (error)
+ return error;
+
+ if (walk.sg) {
+ size_t sg_skip = ready_bytes - done_bytes;
+ size_t sg_rem = areq->nbytes - sg_skip;
+
+ sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
+ req_ctx->partial_buffer +
+ req_ctx->partial_bytes,
+ sg_rem, sg_skip);
+
+ req_ctx->partial_bytes += sg_rem;
+ }
+
+ req_ctx->digcnt += ready_bytes;
+ req_ctx->hash_flags &= ~(HASH_FLAG_UPDATE);
+ }
+
+ /* Finalize */
+ if (req_ctx->hash_flags & HASH_FLAG_FINALIZE) {
+ bool needtrim = contextsize != digestsize;
+ size_t hash_pad_len;
+ u64 digest_bits;
+ u32 oper;
+
+ if (variant == ARTPEC6_CRYPTO)
+ oper = FIELD_GET(A6_CRY_MD_OPER, req_ctx->hash_md);
+ else
+ oper = FIELD_GET(A7_CRY_MD_OPER, req_ctx->hash_md);
+
+ /* Write out the partial buffer if present */
+ if (req_ctx->partial_bytes) {
+ memcpy(req_ctx->partial_buffer_out,
+ req_ctx->partial_buffer,
+ req_ctx->partial_bytes);
+ error = artpec6_crypto_setup_out_descr(common,
+ req_ctx->partial_buffer_out,
+ req_ctx->partial_bytes,
+ false, true);
+ if (error)
+ return error;
+
+ req_ctx->digcnt += req_ctx->partial_bytes;
+ req_ctx->partial_bytes = 0;
+ }
+
+ if (req_ctx->hash_flags & HASH_FLAG_HMAC)
+ digest_bits = 8 * (req_ctx->digcnt + blocksize);
+ else
+ digest_bits = 8 * req_ctx->digcnt;
+
+ /* Add the hash pad */
+ hash_pad_len = create_hash_pad(oper, req_ctx->pad_buffer,
+ req_ctx->digcnt, digest_bits);
+ error = artpec6_crypto_setup_out_descr(common,
+ req_ctx->pad_buffer,
+ hash_pad_len, false,
+ true);
+ req_ctx->digcnt = 0;
+
+ if (error)
+ return error;
+
+ /* Descriptor for the final result */
+ error = artpec6_crypto_setup_in_descr(common, areq->result,
+ digestsize,
+ !needtrim);
+ if (error)
+ return error;
+
+ if (needtrim) {
+ /* Discard the extra context bytes for SHA-384 */
+ error = artpec6_crypto_setup_in_descr(common,
+ req_ctx->partial_buffer,
+ digestsize - contextsize, true);
+ if (error)
+ return error;
+ }
+
+ } else { /* This is not the final operation for this request */
+ if (!run_hw)
+ return ARTPEC6_CRYPTO_PREPARE_HASH_NO_START;
+
+ /* Save the result to the context */
+ error = artpec6_crypto_setup_in_descr(common,
+ req_ctx->digeststate,
+ contextsize, false);
+ if (error)
+ return error;
+ /* fall through */
+ }
+
+ req_ctx->hash_flags &= ~(HASH_FLAG_INIT_CTX | HASH_FLAG_UPDATE |
+ HASH_FLAG_FINALIZE);
+
+ error = artpec6_crypto_terminate_in_descrs(common);
+ if (error)
+ return error;
+
+ error = artpec6_crypto_terminate_out_descrs(common);
+ if (error)
+ return error;
+
+ error = artpec6_crypto_dma_map_descs(common);
+ if (error)
+ return error;
+
+ return ARTPEC6_CRYPTO_PREPARE_HASH_START;
+}
+
+
+static int artpec6_crypto_aes_ecb_init(struct crypto_skcipher *tfm)
+{
+ struct artpec6_cryptotfm_context *ctx = crypto_skcipher_ctx(tfm);
+
+ tfm->reqsize = sizeof(struct artpec6_crypto_request_context);
+ ctx->crypto_type = ARTPEC6_CRYPTO_CIPHER_AES_ECB;
+
+ return 0;
+}
+
+static int artpec6_crypto_aes_ctr_init(struct crypto_skcipher *tfm)
+{
+ struct artpec6_cryptotfm_context *ctx = crypto_skcipher_ctx(tfm);
+
+ ctx->fallback = crypto_alloc_skcipher(crypto_tfm_alg_name(&tfm->base),
+ 0,
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK);
+ if (IS_ERR(ctx->fallback))
+ return PTR_ERR(ctx->fallback);
+
+ tfm->reqsize = sizeof(struct artpec6_crypto_request_context);
+ ctx->crypto_type = ARTPEC6_CRYPTO_CIPHER_AES_CTR;
+
+ return 0;
+}
+
+static int artpec6_crypto_aes_cbc_init(struct crypto_skcipher *tfm)
+{
+ struct artpec6_cryptotfm_context *ctx = crypto_skcipher_ctx(tfm);
+
+ tfm->reqsize = sizeof(struct artpec6_crypto_request_context);
+ ctx->crypto_type = ARTPEC6_CRYPTO_CIPHER_AES_CBC;
+
+ return 0;
+}
+
+static int artpec6_crypto_aes_xts_init(struct crypto_skcipher *tfm)
+{
+ struct artpec6_cryptotfm_context *ctx = crypto_skcipher_ctx(tfm);
+
+ tfm->reqsize = sizeof(struct artpec6_crypto_request_context);
+ ctx->crypto_type = ARTPEC6_CRYPTO_CIPHER_AES_XTS;
+
+ return 0;
+}
+
+static void artpec6_crypto_aes_exit(struct crypto_skcipher *tfm)
+{
+ struct artpec6_cryptotfm_context *ctx = crypto_skcipher_ctx(tfm);
+
+ memset(ctx, 0, sizeof(*ctx));
+}
+
+static void artpec6_crypto_aes_ctr_exit(struct crypto_skcipher *tfm)
+{
+ struct artpec6_cryptotfm_context *ctx = crypto_skcipher_ctx(tfm);
+
+ crypto_free_skcipher(ctx->fallback);
+ artpec6_crypto_aes_exit(tfm);
+}
+
+static int
+artpec6_crypto_cipher_set_key(struct crypto_skcipher *cipher, const u8 *key,
+ unsigned int keylen)
+{
+ struct artpec6_cryptotfm_context *ctx =
+ crypto_skcipher_ctx(cipher);
+
+ switch (keylen) {
+ case 16:
+ case 24:
+ case 32:
+ break;
+ default:
+ crypto_skcipher_set_flags(cipher,
+ CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+
+ memcpy(ctx->aes_key, key, keylen);
+ ctx->key_length = keylen;
+ return 0;
+}
+
+static int
+artpec6_crypto_xts_set_key(struct crypto_skcipher *cipher, const u8 *key,
+ unsigned int keylen)
+{
+ struct artpec6_cryptotfm_context *ctx =
+ crypto_skcipher_ctx(cipher);
+ int ret;
+
+ ret = xts_check_key(&cipher->base, key, keylen);
+ if (ret)
+ return ret;
+
+ switch (keylen) {
+ case 32:
+ case 48:
+ case 64:
+ break;
+ default:
+ crypto_skcipher_set_flags(cipher,
+ CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+
+ memcpy(ctx->aes_key, key, keylen);
+ ctx->key_length = keylen;
+ return 0;
+}
+
+/** artpec6_crypto_process_crypto - Prepare an async block cipher crypto request
+ *
+ * @req: The asynch request to process
+ *
+ * @return 0 if the dma job was successfully prepared
+ * <0 on error
+ *
+ * This function sets up the PDMA descriptors for a block cipher request.
+ *
+ * The required padding is added for AES-CTR using a statically defined
+ * buffer.
+ *
+ * The PDMA descriptor list will be as follows:
+ *
+ * OUT: [KEY_MD][KEY][EOP]<CIPHER_MD>[IV]<data_0>...[data_n][AES-CTR_pad]<eop>
+ * IN: <CIPHER_MD><data_0>...[data_n]<intr>
+ *
+ */
+static int artpec6_crypto_prepare_crypto(struct skcipher_request *areq)
+{
+ int ret;
+ struct artpec6_crypto_walk walk;
+ struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(areq);
+ struct artpec6_cryptotfm_context *ctx = crypto_skcipher_ctx(cipher);
+ struct artpec6_crypto_request_context *req_ctx = NULL;
+ size_t iv_len = crypto_skcipher_ivsize(cipher);
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+ enum artpec6_crypto_variant variant = ac->variant;
+ struct artpec6_crypto_req_common *common;
+ bool cipher_decr = false;
+ size_t cipher_klen;
+ u32 cipher_len = 0; /* Same as regk_crypto_key_128 for NULL crypto */
+ u32 oper;
+
+ req_ctx = skcipher_request_ctx(areq);
+ common = &req_ctx->common;
+
+ artpec6_crypto_init_dma_operation(common);
+
+ if (variant == ARTPEC6_CRYPTO)
+ ctx->key_md = FIELD_PREP(A6_CRY_MD_OPER, a6_regk_crypto_dlkey);
+ else
+ ctx->key_md = FIELD_PREP(A7_CRY_MD_OPER, a7_regk_crypto_dlkey);
+
+ ret = artpec6_crypto_setup_out_descr(common, (void *)&ctx->key_md,
+ sizeof(ctx->key_md), false, false);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_setup_out_descr(common, ctx->aes_key,
+ ctx->key_length, true, false);
+ if (ret)
+ return ret;
+
+ req_ctx->cipher_md = 0;
+
+ if (ctx->crypto_type == ARTPEC6_CRYPTO_CIPHER_AES_XTS)
+ cipher_klen = ctx->key_length/2;
+ else
+ cipher_klen = ctx->key_length;
+
+ /* Metadata */
+ switch (cipher_klen) {
+ case 16:
+ cipher_len = regk_crypto_key_128;
+ break;
+ case 24:
+ cipher_len = regk_crypto_key_192;
+ break;
+ case 32:
+ cipher_len = regk_crypto_key_256;
+ break;
+ default:
+ pr_err("%s: Invalid key length %d!\n",
+ MODULE_NAME, ctx->key_length);
+ return -EINVAL;
+ }
+
+ switch (ctx->crypto_type) {
+ case ARTPEC6_CRYPTO_CIPHER_AES_ECB:
+ oper = regk_crypto_aes_ecb;
+ cipher_decr = req_ctx->decrypt;
+ break;
+
+ case ARTPEC6_CRYPTO_CIPHER_AES_CBC:
+ oper = regk_crypto_aes_cbc;
+ cipher_decr = req_ctx->decrypt;
+ break;
+
+ case ARTPEC6_CRYPTO_CIPHER_AES_CTR:
+ oper = regk_crypto_aes_ctr;
+ cipher_decr = false;
+ break;
+
+ case ARTPEC6_CRYPTO_CIPHER_AES_XTS:
+ oper = regk_crypto_aes_xts;
+ cipher_decr = req_ctx->decrypt;
+
+ if (variant == ARTPEC6_CRYPTO)
+ req_ctx->cipher_md |= A6_CRY_MD_CIPHER_DSEQ;
+ else
+ req_ctx->cipher_md |= A7_CRY_MD_CIPHER_DSEQ;
+ break;
+
+ default:
+ pr_err("%s: Invalid cipher mode %d!\n",
+ MODULE_NAME, ctx->crypto_type);
+ return -EINVAL;
+ }
+
+ if (variant == ARTPEC6_CRYPTO) {
+ req_ctx->cipher_md |= FIELD_PREP(A6_CRY_MD_OPER, oper);
+ req_ctx->cipher_md |= FIELD_PREP(A6_CRY_MD_CIPHER_LEN,
+ cipher_len);
+ if (cipher_decr)
+ req_ctx->cipher_md |= A6_CRY_MD_CIPHER_DECR;
+ } else {
+ req_ctx->cipher_md |= FIELD_PREP(A7_CRY_MD_OPER, oper);
+ req_ctx->cipher_md |= FIELD_PREP(A7_CRY_MD_CIPHER_LEN,
+ cipher_len);
+ if (cipher_decr)
+ req_ctx->cipher_md |= A7_CRY_MD_CIPHER_DECR;
+ }
+
+ ret = artpec6_crypto_setup_out_descr(common,
+ &req_ctx->cipher_md,
+ sizeof(req_ctx->cipher_md),
+ false, false);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_setup_in_descr(common, ac->pad_buffer, 4, false);
+ if (ret)
+ return ret;
+
+ if (iv_len) {
+ ret = artpec6_crypto_setup_out_descr(common, areq->iv, iv_len,
+ false, false);
+ if (ret)
+ return ret;
+ }
+ /* Data out */
+ artpec6_crypto_walk_init(&walk, areq->src);
+ ret = artpec6_crypto_setup_sg_descrs_out(common, &walk, areq->cryptlen);
+ if (ret)
+ return ret;
+
+ /* Data in */
+ artpec6_crypto_walk_init(&walk, areq->dst);
+ ret = artpec6_crypto_setup_sg_descrs_in(common, &walk, areq->cryptlen);
+ if (ret)
+ return ret;
+
+ /* CTR-mode padding required by the HW. */
+ if (ctx->crypto_type == ARTPEC6_CRYPTO_CIPHER_AES_CTR ||
+ ctx->crypto_type == ARTPEC6_CRYPTO_CIPHER_AES_XTS) {
+ size_t pad = ALIGN(areq->cryptlen, AES_BLOCK_SIZE) -
+ areq->cryptlen;
+
+ if (pad) {
+ ret = artpec6_crypto_setup_out_descr(common,
+ ac->pad_buffer,
+ pad, false, false);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_setup_in_descr(common,
+ ac->pad_buffer, pad,
+ false);
+ if (ret)
+ return ret;
+ }
+ }
+
+ ret = artpec6_crypto_terminate_out_descrs(common);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_terminate_in_descrs(common);
+ if (ret)
+ return ret;
+
+ return artpec6_crypto_dma_map_descs(common);
+}
+
+static int artpec6_crypto_prepare_aead(struct aead_request *areq)
+{
+ size_t count;
+ int ret;
+ size_t input_length;
+ struct artpec6_cryptotfm_context *ctx = crypto_tfm_ctx(areq->base.tfm);
+ struct artpec6_crypto_aead_req_ctx *req_ctx = aead_request_ctx(areq);
+ struct crypto_aead *cipher = crypto_aead_reqtfm(areq);
+ struct artpec6_crypto_req_common *common = &req_ctx->common;
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+ enum artpec6_crypto_variant variant = ac->variant;
+ u32 md_cipher_len;
+
+ artpec6_crypto_init_dma_operation(common);
+
+ /* Key */
+ if (variant == ARTPEC6_CRYPTO) {
+ ctx->key_md = FIELD_PREP(A6_CRY_MD_OPER,
+ a6_regk_crypto_dlkey);
+ } else {
+ ctx->key_md = FIELD_PREP(A7_CRY_MD_OPER,
+ a7_regk_crypto_dlkey);
+ }
+ ret = artpec6_crypto_setup_out_descr(common, (void *)&ctx->key_md,
+ sizeof(ctx->key_md), false, false);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_setup_out_descr(common, ctx->aes_key,
+ ctx->key_length, true, false);
+ if (ret)
+ return ret;
+
+ req_ctx->cipher_md = 0;
+
+ switch (ctx->key_length) {
+ case 16:
+ md_cipher_len = regk_crypto_key_128;
+ break;
+ case 24:
+ md_cipher_len = regk_crypto_key_192;
+ break;
+ case 32:
+ md_cipher_len = regk_crypto_key_256;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (variant == ARTPEC6_CRYPTO) {
+ req_ctx->cipher_md |= FIELD_PREP(A6_CRY_MD_OPER,
+ regk_crypto_aes_gcm);
+ req_ctx->cipher_md |= FIELD_PREP(A6_CRY_MD_CIPHER_LEN,
+ md_cipher_len);
+ if (req_ctx->decrypt)
+ req_ctx->cipher_md |= A6_CRY_MD_CIPHER_DECR;
+ } else {
+ req_ctx->cipher_md |= FIELD_PREP(A7_CRY_MD_OPER,
+ regk_crypto_aes_gcm);
+ req_ctx->cipher_md |= FIELD_PREP(A7_CRY_MD_CIPHER_LEN,
+ md_cipher_len);
+ if (req_ctx->decrypt)
+ req_ctx->cipher_md |= A7_CRY_MD_CIPHER_DECR;
+ }
+
+ ret = artpec6_crypto_setup_out_descr(common,
+ (void *) &req_ctx->cipher_md,
+ sizeof(req_ctx->cipher_md), false,
+ false);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_setup_in_descr(common, ac->pad_buffer, 4, false);
+ if (ret)
+ return ret;
+
+ /* For the decryption, cryptlen includes the tag. */
+ input_length = areq->cryptlen;
+ if (req_ctx->decrypt)
+ input_length -= AES_BLOCK_SIZE;
+
+ /* Prepare the context buffer */
+ req_ctx->hw_ctx.aad_length_bits =
+ __cpu_to_be64(8*areq->assoclen);
+
+ req_ctx->hw_ctx.text_length_bits =
+ __cpu_to_be64(8*input_length);
+
+ memcpy(req_ctx->hw_ctx.J0, areq->iv, crypto_aead_ivsize(cipher));
+ // The HW omits the initial increment of the counter field.
+ crypto_inc(req_ctx->hw_ctx.J0+12, 4);
+
+ ret = artpec6_crypto_setup_out_descr(common, &req_ctx->hw_ctx,
+ sizeof(struct artpec6_crypto_aead_hw_ctx), false, false);
+ if (ret)
+ return ret;
+
+ {
+ struct artpec6_crypto_walk walk;
+
+ artpec6_crypto_walk_init(&walk, areq->src);
+
+ /* Associated data */
+ count = areq->assoclen;
+ ret = artpec6_crypto_setup_sg_descrs_out(common, &walk, count);
+ if (ret)
+ return ret;
+
+ if (!IS_ALIGNED(areq->assoclen, 16)) {
+ size_t assoc_pad = 16 - (areq->assoclen % 16);
+ /* The HW mandates zero padding here */
+ ret = artpec6_crypto_setup_out_descr(common,
+ ac->zero_buffer,
+ assoc_pad, false,
+ false);
+ if (ret)
+ return ret;
+ }
+
+ /* Data to crypto */
+ count = input_length;
+ ret = artpec6_crypto_setup_sg_descrs_out(common, &walk, count);
+ if (ret)
+ return ret;
+
+ if (!IS_ALIGNED(input_length, 16)) {
+ size_t crypto_pad = 16 - (input_length % 16);
+ /* The HW mandates zero padding here */
+ ret = artpec6_crypto_setup_out_descr(common,
+ ac->zero_buffer,
+ crypto_pad,
+ false,
+ false);
+ if (ret)
+ return ret;
+ }
+ }
+
+ /* Data from crypto */
+ {
+ struct artpec6_crypto_walk walk;
+ size_t output_len = areq->cryptlen;
+
+ if (req_ctx->decrypt)
+ output_len -= AES_BLOCK_SIZE;
+
+ artpec6_crypto_walk_init(&walk, areq->dst);
+
+ /* skip associated data in the output */
+ count = artpec6_crypto_walk_advance(&walk, areq->assoclen);
+ if (count)
+ return -EINVAL;
+
+ count = output_len;
+ ret = artpec6_crypto_setup_sg_descrs_in(common, &walk, count);
+ if (ret)
+ return ret;
+
+ /* Put padding between the cryptotext and the auth tag */
+ if (!IS_ALIGNED(output_len, 16)) {
+ size_t crypto_pad = 16 - (output_len % 16);
+
+ ret = artpec6_crypto_setup_in_descr(common,
+ ac->pad_buffer,
+ crypto_pad, false);
+ if (ret)
+ return ret;
+ }
+
+ /* The authentication tag shall follow immediately after
+ * the output ciphertext. For decryption it is put in a context
+ * buffer for later compare against the input tag.
+ */
+ count = AES_BLOCK_SIZE;
+
+ if (req_ctx->decrypt) {
+ ret = artpec6_crypto_setup_in_descr(common,
+ req_ctx->decryption_tag, count, false);
+ if (ret)
+ return ret;
+
+ } else {
+ ret = artpec6_crypto_setup_sg_descrs_in(common, &walk,
+ count);
+ if (ret)
+ return ret;
+ }
+
+ }
+
+ ret = artpec6_crypto_terminate_in_descrs(common);
+ if (ret)
+ return ret;
+
+ ret = artpec6_crypto_terminate_out_descrs(common);
+ if (ret)
+ return ret;
+
+ return artpec6_crypto_dma_map_descs(common);
+}
+
+static void artpec6_crypto_process_queue(struct artpec6_crypto *ac)
+{
+ struct artpec6_crypto_req_common *req;
+
+ while (!list_empty(&ac->queue) && !artpec6_crypto_busy()) {
+ req = list_first_entry(&ac->queue,
+ struct artpec6_crypto_req_common,
+ list);
+ list_move_tail(&req->list, &ac->pending);
+ artpec6_crypto_start_dma(req);
+
+ req->req->complete(req->req, -EINPROGRESS);
+ }
+
+ /*
+ * In some cases, the hardware can raise an in_eop_flush interrupt
+ * before actually updating the status, so we have an timer which will
+ * recheck the status on timeout. Since the cases are expected to be
+ * very rare, we use a relatively large timeout value. There should be
+ * no noticeable negative effect if we timeout spuriously.
+ */
+ if (ac->pending_count)
+ mod_timer(&ac->timer, jiffies + msecs_to_jiffies(100));
+ else
+ del_timer(&ac->timer);
+}
+
+static void artpec6_crypto_timeout(unsigned long data)
+{
+ struct artpec6_crypto *ac = (struct artpec6_crypto *) data;
+
+ dev_info_ratelimited(artpec6_crypto_dev, "timeout\n");
+
+ tasklet_schedule(&ac->task);
+}
+
+static void artpec6_crypto_task(unsigned long data)
+{
+ struct artpec6_crypto *ac = (struct artpec6_crypto *)data;
+ struct artpec6_crypto_req_common *req;
+ struct artpec6_crypto_req_common *n;
+
+ if (list_empty(&ac->pending)) {
+ pr_debug("Spurious IRQ\n");
+ return;
+ }
+
+ spin_lock_bh(&ac->queue_lock);
+
+ list_for_each_entry_safe(req, n, &ac->pending, list) {
+ struct artpec6_crypto_dma_descriptors *dma = req->dma;
+ u32 stat;
+
+ dma_sync_single_for_cpu(artpec6_crypto_dev, dma->stat_dma_addr,
+ sizeof(dma->stat[0]),
+ DMA_BIDIRECTIONAL);
+
+ stat = req->dma->stat[req->dma->in_cnt-1];
+
+ /* A non-zero final status descriptor indicates
+ * this job has finished.
+ */
+ pr_debug("Request %p status is %X\n", req, stat);
+ if (!stat)
+ break;
+
+ /* Allow testing of timeout handling with fault injection */
+#ifdef CONFIG_FAULT_INJECTION
+ if (should_fail(&artpec6_crypto_fail_status_read, 1))
+ continue;
+#endif
+
+ pr_debug("Completing request %p\n", req);
+
+ list_del(&req->list);
+
+ artpec6_crypto_dma_unmap_all(req);
+ artpec6_crypto_copy_bounce_buffers(req);
+
+ ac->pending_count--;
+ artpec6_crypto_common_destroy(req);
+ req->complete(req->req);
+ }
+
+ artpec6_crypto_process_queue(ac);
+
+ spin_unlock_bh(&ac->queue_lock);
+}
+
+static void artpec6_crypto_complete_crypto(struct crypto_async_request *req)
+{
+ req->complete(req, 0);
+}
+
+static void
+artpec6_crypto_complete_cbc_decrypt(struct crypto_async_request *req)
+{
+ struct skcipher_request *cipher_req = container_of(req,
+ struct skcipher_request, base);
+
+ scatterwalk_map_and_copy(cipher_req->iv, cipher_req->src,
+ cipher_req->cryptlen - AES_BLOCK_SIZE,
+ AES_BLOCK_SIZE, 0);
+ req->complete(req, 0);
+}
+
+static void
+artpec6_crypto_complete_cbc_encrypt(struct crypto_async_request *req)
+{
+ struct skcipher_request *cipher_req = container_of(req,
+ struct skcipher_request, base);
+
+ scatterwalk_map_and_copy(cipher_req->iv, cipher_req->dst,
+ cipher_req->cryptlen - AES_BLOCK_SIZE,
+ AES_BLOCK_SIZE, 0);
+ req->complete(req, 0);
+}
+
+static void artpec6_crypto_complete_aead(struct crypto_async_request *req)
+{
+ int result = 0;
+
+ /* Verify GCM hashtag. */
+ struct aead_request *areq = container_of(req,
+ struct aead_request, base);
+ struct artpec6_crypto_aead_req_ctx *req_ctx = aead_request_ctx(areq);
+
+ if (req_ctx->decrypt) {
+ u8 input_tag[AES_BLOCK_SIZE];
+
+ sg_pcopy_to_buffer(areq->src,
+ sg_nents(areq->src),
+ input_tag,
+ AES_BLOCK_SIZE,
+ areq->assoclen + areq->cryptlen -
+ AES_BLOCK_SIZE);
+
+ if (memcmp(req_ctx->decryption_tag,
+ input_tag,
+ AES_BLOCK_SIZE)) {
+ pr_debug("***EBADMSG:\n");
+ print_hex_dump_debug("ref:", DUMP_PREFIX_ADDRESS, 32, 1,
+ input_tag, AES_BLOCK_SIZE, true);
+ print_hex_dump_debug("out:", DUMP_PREFIX_ADDRESS, 32, 1,
+ req_ctx->decryption_tag,
+ AES_BLOCK_SIZE, true);
+
+ result = -EBADMSG;
+ }
+ }
+
+ req->complete(req, result);
+}
+
+static void artpec6_crypto_complete_hash(struct crypto_async_request *req)
+{
+ req->complete(req, 0);
+}
+
+
+/*------------------- Hash functions -----------------------------------------*/
+static int
+artpec6_crypto_hash_set_key(struct crypto_ahash *tfm,
+ const u8 *key, unsigned int keylen)
+{
+ struct artpec6_hashalg_context *tfm_ctx = crypto_tfm_ctx(&tfm->base);
+ size_t blocksize;
+ int ret;
+
+ if (!keylen) {
+ pr_err("Invalid length (%d) of HMAC key\n",
+ keylen);
+ return -EINVAL;
+ }
+
+ memset(tfm_ctx->hmac_key, 0, sizeof(tfm_ctx->hmac_key));
+
+ blocksize = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
+
+ if (keylen > blocksize) {
+ SHASH_DESC_ON_STACK(hdesc, tfm_ctx->child_hash);
+
+ hdesc->tfm = tfm_ctx->child_hash;
+ hdesc->flags = crypto_ahash_get_flags(tfm) &
+ CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ tfm_ctx->hmac_key_length = blocksize;
+ ret = crypto_shash_digest(hdesc, key, keylen,
+ tfm_ctx->hmac_key);
+ if (ret)
+ return ret;
+
+ } else {
+ memcpy(tfm_ctx->hmac_key, key, keylen);
+ tfm_ctx->hmac_key_length = keylen;
+ }
+
+ return 0;
+}
+
+static int
+artpec6_crypto_init_hash(struct ahash_request *req, u8 type, int hmac)
+{
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+ enum artpec6_crypto_variant variant = ac->variant;
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+ u32 oper;
+
+ memset(req_ctx, 0, sizeof(*req_ctx));
+
+ req_ctx->hash_flags = HASH_FLAG_INIT_CTX;
+ if (hmac)
+ req_ctx->hash_flags |= (HASH_FLAG_HMAC | HASH_FLAG_UPDATE_KEY);
+
+ switch (type) {
+ case ARTPEC6_CRYPTO_HASH_SHA1:
+ oper = hmac ? regk_crypto_hmac_sha1 : regk_crypto_sha1;
+ break;
+ case ARTPEC6_CRYPTO_HASH_SHA256:
+ oper = hmac ? regk_crypto_hmac_sha256 : regk_crypto_sha256;
+ break;
+ case ARTPEC6_CRYPTO_HASH_SHA384:
+ oper = hmac ? regk_crypto_hmac_sha384 : regk_crypto_sha384;
+ break;
+ case ARTPEC6_CRYPTO_HASH_SHA512:
+ oper = hmac ? regk_crypto_hmac_sha512 : regk_crypto_sha512;
+ break;
+
+ default:
+ pr_err("%s: Unsupported hash type 0x%x\n", MODULE_NAME, type);
+ return -EINVAL;
+ }
+
+ if (variant == ARTPEC6_CRYPTO)
+ req_ctx->hash_md = FIELD_PREP(A6_CRY_MD_OPER, oper);
+ else
+ req_ctx->hash_md = FIELD_PREP(A7_CRY_MD_OPER, oper);
+
+ return 0;
+}
+
+static int artpec6_crypto_prepare_submit_hash(struct ahash_request *req)
+{
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+ int ret;
+
+ if (!req_ctx->common.dma) {
+ ret = artpec6_crypto_common_init(&req_ctx->common,
+ &req->base,
+ artpec6_crypto_complete_hash,
+ NULL, 0);
+
+ if (ret)
+ return ret;
+ }
+
+ ret = artpec6_crypto_prepare_hash(req);
+ switch (ret) {
+ case ARTPEC6_CRYPTO_PREPARE_HASH_START:
+ ret = artpec6_crypto_submit(&req_ctx->common);
+ break;
+
+ case ARTPEC6_CRYPTO_PREPARE_HASH_NO_START:
+ ret = 0;
+ /* Fallthrough */
+
+ default:
+ artpec6_crypto_common_destroy(&req_ctx->common);
+ break;
+ }
+
+ return ret;
+}
+
+static int artpec6_crypto_hash_final(struct ahash_request *req)
+{
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+
+ req_ctx->hash_flags |= HASH_FLAG_FINALIZE;
+
+ return artpec6_crypto_prepare_submit_hash(req);
+}
+
+static int artpec6_crypto_hash_update(struct ahash_request *req)
+{
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+
+ req_ctx->hash_flags |= HASH_FLAG_UPDATE;
+
+ return artpec6_crypto_prepare_submit_hash(req);
+}
+
+static int artpec6_crypto_sha1_init(struct ahash_request *req)
+{
+ return artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA1, 0);
+}
+
+static int artpec6_crypto_sha1_digest(struct ahash_request *req)
+{
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+
+ artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA1, 0);
+
+ req_ctx->hash_flags |= HASH_FLAG_UPDATE | HASH_FLAG_FINALIZE;
+
+ return artpec6_crypto_prepare_submit_hash(req);
+}
+
+static int artpec6_crypto_sha256_init(struct ahash_request *req)
+{
+ return artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA256, 0);
+}
+
+static int artpec6_crypto_sha256_digest(struct ahash_request *req)
+{
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+
+ artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA256, 0);
+ req_ctx->hash_flags |= HASH_FLAG_UPDATE | HASH_FLAG_FINALIZE;
+
+ return artpec6_crypto_prepare_submit_hash(req);
+}
+
+static int __maybe_unused artpec6_crypto_sha384_init(struct ahash_request *req)
+{
+ return artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA384, 0);
+}
+
+static int __maybe_unused
+artpec6_crypto_sha384_digest(struct ahash_request *req)
+{
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+
+ artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA384, 0);
+ req_ctx->hash_flags |= HASH_FLAG_UPDATE | HASH_FLAG_FINALIZE;
+
+ return artpec6_crypto_prepare_submit_hash(req);
+}
+
+static int artpec6_crypto_sha512_init(struct ahash_request *req)
+{
+ return artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA512, 0);
+}
+
+static int artpec6_crypto_sha512_digest(struct ahash_request *req)
+{
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+
+ artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA512, 0);
+ req_ctx->hash_flags |= HASH_FLAG_UPDATE | HASH_FLAG_FINALIZE;
+
+ return artpec6_crypto_prepare_submit_hash(req);
+}
+
+static int artpec6_crypto_hmac_sha256_init(struct ahash_request *req)
+{
+ return artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA256, 1);
+}
+
+static int __maybe_unused
+artpec6_crypto_hmac_sha384_init(struct ahash_request *req)
+{
+ return artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA384, 1);
+}
+
+static int artpec6_crypto_hmac_sha512_init(struct ahash_request *req)
+{
+ return artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA512, 1);
+}
+
+static int artpec6_crypto_hmac_sha256_digest(struct ahash_request *req)
+{
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+
+ artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA256, 1);
+ req_ctx->hash_flags |= HASH_FLAG_UPDATE | HASH_FLAG_FINALIZE;
+
+ return artpec6_crypto_prepare_submit_hash(req);
+}
+
+static int __maybe_unused
+artpec6_crypto_hmac_sha384_digest(struct ahash_request *req)
+{
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+
+ artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA384, 1);
+ req_ctx->hash_flags |= HASH_FLAG_UPDATE | HASH_FLAG_FINALIZE;
+
+ return artpec6_crypto_prepare_submit_hash(req);
+}
+
+static int artpec6_crypto_hmac_sha512_digest(struct ahash_request *req)
+{
+ struct artpec6_hash_request_context *req_ctx = ahash_request_ctx(req);
+
+ artpec6_crypto_init_hash(req, ARTPEC6_CRYPTO_HASH_SHA512, 1);
+ req_ctx->hash_flags |= HASH_FLAG_UPDATE | HASH_FLAG_FINALIZE;
+
+ return artpec6_crypto_prepare_submit_hash(req);
+}
+
+static int artpec6_crypto_ahash_init_common(struct crypto_tfm *tfm,
+ const char *base_hash_name)
+{
+ struct artpec6_hashalg_context *tfm_ctx = crypto_tfm_ctx(tfm);
+
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct artpec6_hash_request_context));
+ memset(tfm_ctx, 0, sizeof(*tfm_ctx));
+
+ if (base_hash_name) {
+ struct crypto_shash *child;
+
+ child = crypto_alloc_shash(base_hash_name, 0,
+ CRYPTO_ALG_NEED_FALLBACK);
+
+ if (IS_ERR(child))
+ return PTR_ERR(child);
+
+ tfm_ctx->child_hash = child;
+ }
+
+ return 0;
+}
+
+static int artpec6_crypto_ahash_init(struct crypto_tfm *tfm)
+{
+ return artpec6_crypto_ahash_init_common(tfm, NULL);
+}
+
+static int artpec6_crypto_ahash_init_hmac_sha256(struct crypto_tfm *tfm)
+{
+ return artpec6_crypto_ahash_init_common(tfm, "sha256");
+}
+
+static int __maybe_unused
+artpec6_crypto_ahash_init_hmac_sha384(struct crypto_tfm *tfm)
+{
+ return artpec6_crypto_ahash_init_common(tfm, "sha384");
+}
+
+static int artpec6_crypto_ahash_init_hmac_sha512(struct crypto_tfm *tfm)
+{
+ return artpec6_crypto_ahash_init_common(tfm, "sha512");
+}
+
+static void artpec6_crypto_ahash_exit(struct crypto_tfm *tfm)
+{
+ struct artpec6_hashalg_context *tfm_ctx = crypto_tfm_ctx(tfm);
+
+ if (tfm_ctx->child_hash)
+ crypto_free_shash(tfm_ctx->child_hash);
+
+ memset(tfm_ctx->hmac_key, 0, sizeof(tfm_ctx->hmac_key));
+ tfm_ctx->hmac_key_length = 0;
+}
+
+static int artpec6_crypto_hash_export(struct ahash_request *req, void *out)
+{
+ const struct artpec6_hash_request_context *ctx = ahash_request_ctx(req);
+ struct artpec6_hash_export_state *state = out;
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+ enum artpec6_crypto_variant variant = ac->variant;
+
+ BUILD_BUG_ON(sizeof(state->partial_buffer) !=
+ sizeof(ctx->partial_buffer));
+ BUILD_BUG_ON(sizeof(state->digeststate) != sizeof(ctx->digeststate));
+
+ state->digcnt = ctx->digcnt;
+ state->partial_bytes = ctx->partial_bytes;
+ state->hash_flags = ctx->hash_flags;
+
+ if (variant == ARTPEC6_CRYPTO)
+ state->oper = FIELD_GET(A6_CRY_MD_OPER, ctx->hash_md);
+ else
+ state->oper = FIELD_GET(A7_CRY_MD_OPER, ctx->hash_md);
+
+ memcpy(state->partial_buffer, ctx->partial_buffer,
+ sizeof(state->partial_buffer));
+ memcpy(state->digeststate, ctx->digeststate,
+ sizeof(state->digeststate));
+
+ return 0;
+}
+
+static int artpec6_crypto_hash_import(struct ahash_request *req, const void *in)
+{
+ struct artpec6_hash_request_context *ctx = ahash_request_ctx(req);
+ const struct artpec6_hash_export_state *state = in;
+ struct artpec6_crypto *ac = dev_get_drvdata(artpec6_crypto_dev);
+ enum artpec6_crypto_variant variant = ac->variant;
+
+ memset(ctx, 0, sizeof(*ctx));
+
+ ctx->digcnt = state->digcnt;
+ ctx->partial_bytes = state->partial_bytes;
+ ctx->hash_flags = state->hash_flags;
+
+ if (variant == ARTPEC6_CRYPTO)
+ ctx->hash_md = FIELD_PREP(A6_CRY_MD_OPER, state->oper);
+ else
+ ctx->hash_md = FIELD_PREP(A7_CRY_MD_OPER, state->oper);
+
+ memcpy(ctx->partial_buffer, state->partial_buffer,
+ sizeof(state->partial_buffer));
+ memcpy(ctx->digeststate, state->digeststate,
+ sizeof(state->digeststate));
+
+ return 0;
+}
+
+static int init_crypto_hw(struct artpec6_crypto *ac)
+{
+ enum artpec6_crypto_variant variant = ac->variant;
+ void __iomem *base = ac->base;
+ u32 out_descr_buf_size;
+ u32 out_data_buf_size;
+ u32 in_data_buf_size;
+ u32 in_descr_buf_size;
+ u32 in_stat_buf_size;
+ u32 in, out;
+
+ /*
+ * The PDMA unit contains 1984 bytes of internal memory for the OUT
+ * channels and 1024 bytes for the IN channel. This is an elastic
+ * memory used to internally store the descriptors and data. The values
+ * ares specified in 64 byte incremements. Trustzone buffers are not
+ * used at this stage.
+ */
+ out_data_buf_size = 16; /* 1024 bytes for data */
+ out_descr_buf_size = 15; /* 960 bytes for descriptors */
+ in_data_buf_size = 8; /* 512 bytes for data */
+ in_descr_buf_size = 4; /* 256 bytes for descriptors */
+ in_stat_buf_size = 4; /* 256 bytes for stat descrs */
+
+ BUILD_BUG_ON_MSG((out_data_buf_size
+ + out_descr_buf_size) * 64 > 1984,
+ "Invalid OUT configuration");
+
+ BUILD_BUG_ON_MSG((in_data_buf_size
+ + in_descr_buf_size
+ + in_stat_buf_size) * 64 > 1024,
+ "Invalid IN configuration");
+
+ in = FIELD_PREP(PDMA_IN_BUF_CFG_DATA_BUF_SIZE, in_data_buf_size) |
+ FIELD_PREP(PDMA_IN_BUF_CFG_DESCR_BUF_SIZE, in_descr_buf_size) |
+ FIELD_PREP(PDMA_IN_BUF_CFG_STAT_BUF_SIZE, in_stat_buf_size);
+
+ out = FIELD_PREP(PDMA_OUT_BUF_CFG_DATA_BUF_SIZE, out_data_buf_size) |
+ FIELD_PREP(PDMA_OUT_BUF_CFG_DESCR_BUF_SIZE, out_descr_buf_size);
+
+ writel_relaxed(out, base + PDMA_OUT_BUF_CFG);
+ writel_relaxed(PDMA_OUT_CFG_EN, base + PDMA_OUT_CFG);
+
+ if (variant == ARTPEC6_CRYPTO) {
+ writel_relaxed(in, base + A6_PDMA_IN_BUF_CFG);
+ writel_relaxed(PDMA_IN_CFG_EN, base + A6_PDMA_IN_CFG);
+ writel_relaxed(A6_PDMA_INTR_MASK_IN_DATA |
+ A6_PDMA_INTR_MASK_IN_EOP_FLUSH,
+ base + A6_PDMA_INTR_MASK);
+ } else {
+ writel_relaxed(in, base + A7_PDMA_IN_BUF_CFG);
+ writel_relaxed(PDMA_IN_CFG_EN, base + A7_PDMA_IN_CFG);
+ writel_relaxed(A7_PDMA_INTR_MASK_IN_DATA |
+ A7_PDMA_INTR_MASK_IN_EOP_FLUSH,
+ base + A7_PDMA_INTR_MASK);
+ }
+
+ return 0;
+}
+
+static void artpec6_crypto_disable_hw(struct artpec6_crypto *ac)
+{
+ enum artpec6_crypto_variant variant = ac->variant;
+ void __iomem *base = ac->base;
+
+ if (variant == ARTPEC6_CRYPTO) {
+ writel_relaxed(A6_PDMA_IN_CMD_STOP, base + A6_PDMA_IN_CMD);
+ writel_relaxed(0, base + A6_PDMA_IN_CFG);
+ writel_relaxed(A6_PDMA_OUT_CMD_STOP, base + PDMA_OUT_CMD);
+ } else {
+ writel_relaxed(A7_PDMA_IN_CMD_STOP, base + A7_PDMA_IN_CMD);
+ writel_relaxed(0, base + A7_PDMA_IN_CFG);
+ writel_relaxed(A7_PDMA_OUT_CMD_STOP, base + PDMA_OUT_CMD);
+ }
+
+ writel_relaxed(0, base + PDMA_OUT_CFG);
+
+}
+
+static irqreturn_t artpec6_crypto_irq(int irq, void *dev_id)
+{
+ struct artpec6_crypto *ac = dev_id;
+ enum artpec6_crypto_variant variant = ac->variant;
+ void __iomem *base = ac->base;
+ u32 mask_in_data, mask_in_eop_flush;
+ u32 in_cmd_flush_stat, in_cmd_reg;
+ u32 ack_intr_reg;
+ u32 ack = 0;
+ u32 intr;
+
+ if (variant == ARTPEC6_CRYPTO) {
+ intr = readl_relaxed(base + A6_PDMA_MASKED_INTR);
+ mask_in_data = A6_PDMA_INTR_MASK_IN_DATA;
+ mask_in_eop_flush = A6_PDMA_INTR_MASK_IN_EOP_FLUSH;
+ in_cmd_flush_stat = A6_PDMA_IN_CMD_FLUSH_STAT;
+ in_cmd_reg = A6_PDMA_IN_CMD;
+ ack_intr_reg = A6_PDMA_ACK_INTR;
+ } else {
+ intr = readl_relaxed(base + A7_PDMA_MASKED_INTR);
+ mask_in_data = A7_PDMA_INTR_MASK_IN_DATA;
+ mask_in_eop_flush = A7_PDMA_INTR_MASK_IN_EOP_FLUSH;
+ in_cmd_flush_stat = A7_PDMA_IN_CMD_FLUSH_STAT;
+ in_cmd_reg = A7_PDMA_IN_CMD;
+ ack_intr_reg = A7_PDMA_ACK_INTR;
+ }
+
+ /* We get two interrupt notifications from each job.
+ * The in_data means all data was sent to memory and then
+ * we request a status flush command to write the per-job
+ * status to its status vector. This ensures that the
+ * tasklet can detect exactly how many submitted jobs
+ * that have finished.
+ */
+ if (intr & mask_in_data)
+ ack |= mask_in_data;
+
+ if (intr & mask_in_eop_flush)
+ ack |= mask_in_eop_flush;
+ else
+ writel_relaxed(in_cmd_flush_stat, base + in_cmd_reg);
+
+ writel_relaxed(ack, base + ack_intr_reg);
+
+ if (intr & mask_in_eop_flush)
+ tasklet_schedule(&ac->task);
+
+ return IRQ_HANDLED;
+}
+
+/*------------------- Algorithm definitions ----------------------------------*/
+
+/* Hashes */
+static struct ahash_alg hash_algos[] = {
+ /* SHA-1 */
+ {
+ .init = artpec6_crypto_sha1_init,
+ .update = artpec6_crypto_hash_update,
+ .final = artpec6_crypto_hash_final,
+ .digest = artpec6_crypto_sha1_digest,
+ .import = artpec6_crypto_hash_import,
+ .export = artpec6_crypto_hash_export,
+ .halg.digestsize = SHA1_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct artpec6_hash_export_state),
+ .halg.base = {
+ .cra_name = "sha1",
+ .cra_driver_name = "artpec-sha1",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct artpec6_hashalg_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_init = artpec6_crypto_ahash_init,
+ .cra_exit = artpec6_crypto_ahash_exit,
+ }
+ },
+ /* SHA-256 */
+ {
+ .init = artpec6_crypto_sha256_init,
+ .update = artpec6_crypto_hash_update,
+ .final = artpec6_crypto_hash_final,
+ .digest = artpec6_crypto_sha256_digest,
+ .import = artpec6_crypto_hash_import,
+ .export = artpec6_crypto_hash_export,
+ .halg.digestsize = SHA256_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct artpec6_hash_export_state),
+ .halg.base = {
+ .cra_name = "sha256",
+ .cra_driver_name = "artpec-sha256",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA256_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct artpec6_hashalg_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_init = artpec6_crypto_ahash_init,
+ .cra_exit = artpec6_crypto_ahash_exit,
+ }
+ },
+ /* HMAC SHA-256 */
+ {
+ .init = artpec6_crypto_hmac_sha256_init,
+ .update = artpec6_crypto_hash_update,
+ .final = artpec6_crypto_hash_final,
+ .digest = artpec6_crypto_hmac_sha256_digest,
+ .import = artpec6_crypto_hash_import,
+ .export = artpec6_crypto_hash_export,
+ .setkey = artpec6_crypto_hash_set_key,
+ .halg.digestsize = SHA256_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct artpec6_hash_export_state),
+ .halg.base = {
+ .cra_name = "hmac(sha256)",
+ .cra_driver_name = "artpec-hmac-sha256",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA256_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct artpec6_hashalg_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_init = artpec6_crypto_ahash_init_hmac_sha256,
+ .cra_exit = artpec6_crypto_ahash_exit,
+ }
+ },
+};
+
+static struct ahash_alg artpec7_hash_algos[] = {
+ /* SHA-384 */
+ {
+ .init = artpec6_crypto_sha384_init,
+ .update = artpec6_crypto_hash_update,
+ .final = artpec6_crypto_hash_final,
+ .digest = artpec6_crypto_sha384_digest,
+ .import = artpec6_crypto_hash_import,
+ .export = artpec6_crypto_hash_export,
+ .halg.digestsize = SHA384_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct artpec6_hash_export_state),
+ .halg.base = {
+ .cra_name = "sha384",
+ .cra_driver_name = "artpec-sha384",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA384_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct artpec6_hashalg_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_init = artpec6_crypto_ahash_init,
+ .cra_exit = artpec6_crypto_ahash_exit,
+ }
+ },
+ /* HMAC SHA-384 */
+ {
+ .init = artpec6_crypto_hmac_sha384_init,
+ .update = artpec6_crypto_hash_update,
+ .final = artpec6_crypto_hash_final,
+ .digest = artpec6_crypto_hmac_sha384_digest,
+ .import = artpec6_crypto_hash_import,
+ .export = artpec6_crypto_hash_export,
+ .setkey = artpec6_crypto_hash_set_key,
+ .halg.digestsize = SHA384_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct artpec6_hash_export_state),
+ .halg.base = {
+ .cra_name = "hmac(sha384)",
+ .cra_driver_name = "artpec-hmac-sha384",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA384_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct artpec6_hashalg_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_init = artpec6_crypto_ahash_init_hmac_sha384,
+ .cra_exit = artpec6_crypto_ahash_exit,
+ }
+ },
+ /* SHA-512 */
+ {
+ .init = artpec6_crypto_sha512_init,
+ .update = artpec6_crypto_hash_update,
+ .final = artpec6_crypto_hash_final,
+ .digest = artpec6_crypto_sha512_digest,
+ .import = artpec6_crypto_hash_import,
+ .export = artpec6_crypto_hash_export,
+ .halg.digestsize = SHA512_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct artpec6_hash_export_state),
+ .halg.base = {
+ .cra_name = "sha512",
+ .cra_driver_name = "artpec-sha512",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA512_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct artpec6_hashalg_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_init = artpec6_crypto_ahash_init,
+ .cra_exit = artpec6_crypto_ahash_exit,
+ }
+ },
+ /* HMAC SHA-512 */
+ {
+ .init = artpec6_crypto_hmac_sha512_init,
+ .update = artpec6_crypto_hash_update,
+ .final = artpec6_crypto_hash_final,
+ .digest = artpec6_crypto_hmac_sha512_digest,
+ .import = artpec6_crypto_hash_import,
+ .export = artpec6_crypto_hash_export,
+ .setkey = artpec6_crypto_hash_set_key,
+ .halg.digestsize = SHA512_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct artpec6_hash_export_state),
+ .halg.base = {
+ .cra_name = "hmac(sha512)",
+ .cra_driver_name = "artpec-hmac-sha512",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA512_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct artpec6_hashalg_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_init = artpec6_crypto_ahash_init_hmac_sha512,
+ .cra_exit = artpec6_crypto_ahash_exit,
+ }
+ },
+};
+
+/* Crypto */
+static struct skcipher_alg crypto_algos[] = {
+ /* AES - ECB */
+ {
+ .base = {
+ .cra_name = "ecb(aes)",
+ .cra_driver_name = "artpec6-ecb-aes",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct artpec6_cryptotfm_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ },
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = artpec6_crypto_cipher_set_key,
+ .encrypt = artpec6_crypto_encrypt,
+ .decrypt = artpec6_crypto_decrypt,
+ .init = artpec6_crypto_aes_ecb_init,
+ .exit = artpec6_crypto_aes_exit,
+ },
+ /* AES - CTR */
+ {
+ .base = {
+ .cra_name = "ctr(aes)",
+ .cra_driver_name = "artpec6-ctr-aes",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct artpec6_cryptotfm_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ },
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = artpec6_crypto_cipher_set_key,
+ .encrypt = artpec6_crypto_ctr_encrypt,
+ .decrypt = artpec6_crypto_ctr_decrypt,
+ .init = artpec6_crypto_aes_ctr_init,
+ .exit = artpec6_crypto_aes_ctr_exit,
+ },
+ /* AES - CBC */
+ {
+ .base = {
+ .cra_name = "cbc(aes)",
+ .cra_driver_name = "artpec6-cbc-aes",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct artpec6_cryptotfm_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ },
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = artpec6_crypto_cipher_set_key,
+ .encrypt = artpec6_crypto_encrypt,
+ .decrypt = artpec6_crypto_decrypt,
+ .init = artpec6_crypto_aes_cbc_init,
+ .exit = artpec6_crypto_aes_exit
+ },
+ /* AES - XTS */
+ {
+ .base = {
+ .cra_name = "xts(aes)",
+ .cra_driver_name = "artpec6-xts-aes",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct artpec6_cryptotfm_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ },
+ .min_keysize = 2*AES_MIN_KEY_SIZE,
+ .max_keysize = 2*AES_MAX_KEY_SIZE,
+ .ivsize = 16,
+ .setkey = artpec6_crypto_xts_set_key,
+ .encrypt = artpec6_crypto_encrypt,
+ .decrypt = artpec6_crypto_decrypt,
+ .init = artpec6_crypto_aes_xts_init,
+ .exit = artpec6_crypto_aes_exit,
+ },
+};
+
+static struct aead_alg aead_algos[] = {
+ {
+ .init = artpec6_crypto_aead_init,
+ .setkey = artpec6_crypto_aead_set_key,
+ .encrypt = artpec6_crypto_aead_encrypt,
+ .decrypt = artpec6_crypto_aead_decrypt,
+ .ivsize = AES_BLOCK_SIZE,
+ .maxauthsize = AES_BLOCK_SIZE,
+
+ .base = {
+ .cra_name = "gcm(aes)",
+ .cra_driver_name = "artpec-gcm-aes",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct artpec6_cryptotfm_context),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ },
+ }
+};
+
+#ifdef CONFIG_DEBUG_FS
+
+struct dbgfs_u32 {
+ char *name;
+ mode_t mode;
+ u32 *flag;
+ char *desc;
+};
+
+static void artpec6_crypto_init_debugfs(void)
+{
+ dbgfs_root = debugfs_create_dir("artpec6_crypto", NULL);
+
+ if (!dbgfs_root || IS_ERR(dbgfs_root)) {
+ dbgfs_root = NULL;
+ pr_err("%s: Could not initialise debugfs!\n", MODULE_NAME);
+ return;
+ }
+
+#ifdef CONFIG_FAULT_INJECTION
+ fault_create_debugfs_attr("fail_status_read", dbgfs_root,
+ &artpec6_crypto_fail_status_read);
+
+ fault_create_debugfs_attr("fail_dma_array_full", dbgfs_root,
+ &artpec6_crypto_fail_dma_array_full);
+#endif
+}
+
+static void artpec6_crypto_free_debugfs(void)
+{
+ if (!dbgfs_root)
+ return;
+
+ debugfs_remove_recursive(dbgfs_root);
+ dbgfs_root = NULL;
+}
+#endif
+
+static const struct of_device_id artpec6_crypto_of_match[] = {
+ { .compatible = "axis,artpec6-crypto", .data = (void *)ARTPEC6_CRYPTO },
+ { .compatible = "axis,artpec7-crypto", .data = (void *)ARTPEC7_CRYPTO },
+ {}
+};
+MODULE_DEVICE_TABLE(of, artpec6_crypto_of_match);
+
+static int artpec6_crypto_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *match;
+ enum artpec6_crypto_variant variant;
+ struct artpec6_crypto *ac;
+ struct device *dev = &pdev->dev;
+ void __iomem *base;
+ struct resource *res;
+ int irq;
+ int err;
+
+ if (artpec6_crypto_dev)
+ return -ENODEV;
+
+ match = of_match_node(artpec6_crypto_of_match, dev->of_node);
+ if (!match)
+ return -EINVAL;
+
+ variant = (enum artpec6_crypto_variant)match->data;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -ENODEV;
+
+ ac = devm_kzalloc(&pdev->dev, sizeof(struct artpec6_crypto),
+ GFP_KERNEL);
+ if (!ac)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, ac);
+ ac->variant = variant;
+
+ spin_lock_init(&ac->queue_lock);
+ INIT_LIST_HEAD(&ac->queue);
+ INIT_LIST_HEAD(&ac->pending);
+ setup_timer(&ac->timer, artpec6_crypto_timeout, (unsigned long) ac);
+
+ ac->base = base;
+
+ ac->dma_cache = kmem_cache_create("artpec6_crypto_dma",
+ sizeof(struct artpec6_crypto_dma_descriptors),
+ 64,
+ 0,
+ NULL);
+ if (!ac->dma_cache)
+ return -ENOMEM;
+
+#ifdef CONFIG_DEBUG_FS
+ artpec6_crypto_init_debugfs();
+#endif
+
+ tasklet_init(&ac->task, artpec6_crypto_task,
+ (unsigned long)ac);
+
+ ac->pad_buffer = devm_kzalloc(&pdev->dev, 2 * ARTPEC_CACHE_LINE_MAX,
+ GFP_KERNEL);
+ if (!ac->pad_buffer)
+ return -ENOMEM;
+ ac->pad_buffer = PTR_ALIGN(ac->pad_buffer, ARTPEC_CACHE_LINE_MAX);
+
+ ac->zero_buffer = devm_kzalloc(&pdev->dev, 2 * ARTPEC_CACHE_LINE_MAX,
+ GFP_KERNEL);
+ if (!ac->zero_buffer)
+ return -ENOMEM;
+ ac->zero_buffer = PTR_ALIGN(ac->zero_buffer, ARTPEC_CACHE_LINE_MAX);
+
+ err = init_crypto_hw(ac);
+ if (err)
+ goto free_cache;
+
+ err = devm_request_irq(&pdev->dev, irq, artpec6_crypto_irq, 0,
+ "artpec6-crypto", ac);
+ if (err)
+ goto disable_hw;
+
+ artpec6_crypto_dev = &pdev->dev;
+
+ err = crypto_register_ahashes(hash_algos, ARRAY_SIZE(hash_algos));
+ if (err) {
+ dev_err(dev, "Failed to register ahashes\n");
+ goto disable_hw;
+ }
+
+ if (variant != ARTPEC6_CRYPTO) {
+ err = crypto_register_ahashes(artpec7_hash_algos,
+ ARRAY_SIZE(artpec7_hash_algos));
+ if (err) {
+ dev_err(dev, "Failed to register ahashes\n");
+ goto unregister_ahashes;
+ }
+ }
+
+ err = crypto_register_skciphers(crypto_algos, ARRAY_SIZE(crypto_algos));
+ if (err) {
+ dev_err(dev, "Failed to register ciphers\n");
+ goto unregister_a7_ahashes;
+ }
+
+ err = crypto_register_aeads(aead_algos, ARRAY_SIZE(aead_algos));
+ if (err) {
+ dev_err(dev, "Failed to register aeads\n");
+ goto unregister_algs;
+ }
+
+ return 0;
+
+unregister_algs:
+ crypto_unregister_skciphers(crypto_algos, ARRAY_SIZE(crypto_algos));
+unregister_a7_ahashes:
+ if (variant != ARTPEC6_CRYPTO)
+ crypto_unregister_ahashes(artpec7_hash_algos,
+ ARRAY_SIZE(artpec7_hash_algos));
+unregister_ahashes:
+ crypto_unregister_ahashes(hash_algos, ARRAY_SIZE(hash_algos));
+disable_hw:
+ artpec6_crypto_disable_hw(ac);
+free_cache:
+ kmem_cache_destroy(ac->dma_cache);
+ return err;
+}
+
+static int artpec6_crypto_remove(struct platform_device *pdev)
+{
+ struct artpec6_crypto *ac = platform_get_drvdata(pdev);
+ int irq = platform_get_irq(pdev, 0);
+
+ crypto_unregister_ahashes(hash_algos, ARRAY_SIZE(hash_algos));
+ if (ac->variant != ARTPEC6_CRYPTO)
+ crypto_unregister_ahashes(artpec7_hash_algos,
+ ARRAY_SIZE(artpec7_hash_algos));
+ crypto_unregister_skciphers(crypto_algos, ARRAY_SIZE(crypto_algos));
+ crypto_unregister_aeads(aead_algos, ARRAY_SIZE(aead_algos));
+
+ tasklet_disable(&ac->task);
+ devm_free_irq(&pdev->dev, irq, ac);
+ tasklet_kill(&ac->task);
+ del_timer_sync(&ac->timer);
+
+ artpec6_crypto_disable_hw(ac);
+
+ kmem_cache_destroy(ac->dma_cache);
+#ifdef CONFIG_DEBUG_FS
+ artpec6_crypto_free_debugfs();
+#endif
+ return 0;
+}
+
+static struct platform_driver artpec6_crypto_driver = {
+ .probe = artpec6_crypto_probe,
+ .remove = artpec6_crypto_remove,
+ .driver = {
+ .name = "artpec6-crypto",
+ .owner = THIS_MODULE,
+ .of_match_table = artpec6_crypto_of_match,
+ },
+};
+
+module_platform_driver(artpec6_crypto_driver);
+
+MODULE_AUTHOR("Axis Communications AB");
+MODULE_DESCRIPTION("ARTPEC-6 Crypto driver");
+MODULE_LICENSE("GPL");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff