1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Support for OMAP AES HW ACCELERATOR defines
7 * Copyright (c) 2015 Texas Instruments Incorporated
10 #define __OMAP_AES_H__
12 #include <crypto/aes.h>
14 #define DST_MAXBURST 4
15 #define DMA_MIN (DST_MAXBURST * sizeof(u32))
17 #define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset)
20 * OMAP TRM gives bitfields as start:end, where start is the higher bit
21 * number. For example 7:0
23 #define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
24 #define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
26 #define AES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \
27 (((x) ^ 0x01) * 0x04))
28 #define AES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04))
30 #define AES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs)
31 #define AES_REG_CTRL_CONTEXT_READY BIT(31)
32 #define AES_REG_CTRL_CTR_WIDTH_MASK GENMASK(8, 7)
33 #define AES_REG_CTRL_CTR_WIDTH_32 0
34 #define AES_REG_CTRL_CTR_WIDTH_64 BIT(7)
35 #define AES_REG_CTRL_CTR_WIDTH_96 BIT(8)
36 #define AES_REG_CTRL_CTR_WIDTH_128 GENMASK(8, 7)
37 #define AES_REG_CTRL_GCM GENMASK(17, 16)
38 #define AES_REG_CTRL_CTR BIT(6)
39 #define AES_REG_CTRL_CBC BIT(5)
40 #define AES_REG_CTRL_KEY_SIZE GENMASK(4, 3)
41 #define AES_REG_CTRL_DIRECTION BIT(2)
42 #define AES_REG_CTRL_INPUT_READY BIT(1)
43 #define AES_REG_CTRL_OUTPUT_READY BIT(0)
44 #define AES_REG_CTRL_MASK GENMASK(24, 2)
46 #define AES_REG_C_LEN_0 0x54
47 #define AES_REG_C_LEN_1 0x58
48 #define AES_REG_A_LEN 0x5C
50 #define AES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04))
51 #define AES_REG_TAG_N(dd, x) (0x70 + ((x) * 0x04))
53 #define AES_REG_REV(dd) ((dd)->pdata->rev_ofs)
55 #define AES_REG_MASK(dd) ((dd)->pdata->mask_ofs)
56 #define AES_REG_MASK_SIDLE BIT(6)
57 #define AES_REG_MASK_START BIT(5)
58 #define AES_REG_MASK_DMA_OUT_EN BIT(3)
59 #define AES_REG_MASK_DMA_IN_EN BIT(2)
60 #define AES_REG_MASK_SOFTRESET BIT(1)
61 #define AES_REG_AUTOIDLE BIT(0)
63 #define AES_REG_LENGTH_N(x) (0x54 + ((x) * 0x04))
65 #define AES_REG_IRQ_STATUS(dd) ((dd)->pdata->irq_status_ofs)
66 #define AES_REG_IRQ_ENABLE(dd) ((dd)->pdata->irq_enable_ofs)
67 #define AES_REG_IRQ_DATA_IN BIT(1)
68 #define AES_REG_IRQ_DATA_OUT BIT(2)
69 #define DEFAULT_TIMEOUT (5 * HZ)
71 #define DEFAULT_AUTOSUSPEND_DELAY 1000
73 #define FLAGS_MODE_MASK 0x001f
74 #define FLAGS_ENCRYPT BIT(0)
75 #define FLAGS_CBC BIT(1)
76 #define FLAGS_CTR BIT(2)
77 #define FLAGS_GCM BIT(3)
78 #define FLAGS_RFC4106_GCM BIT(4)
80 #define FLAGS_INIT BIT(5)
81 #define FLAGS_FAST BIT(6)
83 #define FLAGS_IN_DATA_ST_SHIFT 8
84 #define FLAGS_OUT_DATA_ST_SHIFT 10
85 #define FLAGS_ASSOC_DATA_ST_SHIFT 12
87 #define AES_BLOCK_WORDS (AES_BLOCK_SIZE >> 2)
89 struct omap_aes_gcm_result {
90 struct completion completion;
96 u32 key[AES_KEYSIZE_256 / sizeof(u32)];
98 struct crypto_skcipher *fallback;
101 struct omap_aes_gcm_ctx {
102 struct omap_aes_ctx octx;
103 struct crypto_aes_ctx actx;
106 struct omap_aes_reqctx {
107 struct omap_aes_dev *dd;
109 u8 iv[AES_BLOCK_SIZE];
110 u32 auth_tag[AES_BLOCK_SIZE / sizeof(u32)];
111 struct skcipher_request fallback_req; // keep at the end
114 #define OMAP_AES_QUEUE_LENGTH 1
115 #define OMAP_AES_CACHE_SIZE 0
117 struct omap_aes_algs_info {
118 struct skcipher_engine_alg *algs_list;
120 unsigned int registered;
123 struct omap_aes_aead_algs {
124 struct aead_engine_alg *algs_list;
126 unsigned int registered;
129 struct omap_aes_pdata {
130 struct omap_aes_algs_info *algs_info;
131 unsigned int algs_info_size;
132 struct omap_aes_aead_algs *aead_algs_info;
134 void (*trigger)(struct omap_aes_dev *dd, int length);
155 struct omap_aes_dev {
156 struct list_head list;
157 unsigned long phys_base;
158 void __iomem *io_base;
159 struct omap_aes_ctx *ctx;
164 struct tasklet_struct done_task;
165 struct aead_queue aead_queue;
168 struct skcipher_request *req;
169 struct aead_request *aead_req;
170 struct crypto_engine *engine;
173 * total is used by PIO mode for book keeping so introduce
174 * variable total_save as need it to calc page_order
181 struct scatterlist *in_sg;
182 struct scatterlist *out_sg;
184 /* Buffers for copying for unaligned cases */
185 struct scatterlist in_sgl[2];
186 struct scatterlist out_sgl;
187 struct scatterlist *orig_out;
189 struct scatter_walk in_walk;
190 struct scatter_walk out_walk;
191 struct dma_chan *dma_lch_in;
192 struct dma_chan *dma_lch_out;
196 const struct omap_aes_pdata *pdata;
199 u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset);
200 void omap_aes_write(struct omap_aes_dev *dd, u32 offset, u32 value);
201 struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_reqctx *rctx);
202 int omap_aes_gcm_setkey(struct crypto_aead *tfm, const u8 *key,
203 unsigned int keylen);
204 int omap_aes_4106gcm_setkey(struct crypto_aead *tfm, const u8 *key,
205 unsigned int keylen);
206 int omap_aes_gcm_encrypt(struct aead_request *req);
207 int omap_aes_gcm_decrypt(struct aead_request *req);
208 int omap_aes_gcm_setauthsize(struct crypto_aead *tfm, unsigned int authsize);
209 int omap_aes_4106gcm_encrypt(struct aead_request *req);
210 int omap_aes_4106gcm_decrypt(struct aead_request *req);
211 int omap_aes_4106gcm_setauthsize(struct crypto_aead *parent,
212 unsigned int authsize);
213 int omap_aes_gcm_cra_init(struct crypto_aead *tfm);
214 int omap_aes_write_ctrl(struct omap_aes_dev *dd);
215 int omap_aes_crypt_dma_start(struct omap_aes_dev *dd);
216 int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd);
217 void omap_aes_gcm_dma_out_callback(void *data);
218 void omap_aes_clear_copy_flags(struct omap_aes_dev *dd);
219 int omap_aes_gcm_crypt_req(struct crypto_engine *engine, void *areq);