Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * Support for Samsung S5PV210 HW acceleration. |
| 5 | * |
| 6 | * Copyright (C) 2011 NetUP Inc. All rights reserved. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as published |
| 10 | * by the Free Software Foundation. |
| 11 | * |
| 12 | */ |
| 13 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 14 | #include <linux/clk.h> |
Krzysztof Kozlowski | 3cf9d84 | 2016-03-22 10:58:25 +0900 | [diff] [blame] | 15 | #include <linux/crypto.h> |
| 16 | #include <linux/dma-mapping.h> |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/errno.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/io.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/of.h> |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/scatterlist.h> |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 27 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 28 | #include <crypto/ctr.h> |
Krzysztof Kozlowski | 3cf9d84 | 2016-03-22 10:58:25 +0900 | [diff] [blame] | 29 | #include <crypto/aes.h> |
| 30 | #include <crypto/algapi.h> |
Krzysztof Kozlowski | 9e4a110 | 2016-03-22 10:58:24 +0900 | [diff] [blame] | 31 | #include <crypto/scatterwalk.h> |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 32 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 33 | #define _SBF(s, v) ((v) << (s)) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 34 | |
| 35 | /* Feed control registers */ |
| 36 | #define SSS_REG_FCINTSTAT 0x0000 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 37 | #define SSS_FCINTSTAT_BRDMAINT BIT(3) |
| 38 | #define SSS_FCINTSTAT_BTDMAINT BIT(2) |
| 39 | #define SSS_FCINTSTAT_HRDMAINT BIT(1) |
| 40 | #define SSS_FCINTSTAT_PKDMAINT BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 41 | |
| 42 | #define SSS_REG_FCINTENSET 0x0004 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 43 | #define SSS_FCINTENSET_BRDMAINTENSET BIT(3) |
| 44 | #define SSS_FCINTENSET_BTDMAINTENSET BIT(2) |
| 45 | #define SSS_FCINTENSET_HRDMAINTENSET BIT(1) |
| 46 | #define SSS_FCINTENSET_PKDMAINTENSET BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 47 | |
| 48 | #define SSS_REG_FCINTENCLR 0x0008 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 49 | #define SSS_FCINTENCLR_BRDMAINTENCLR BIT(3) |
| 50 | #define SSS_FCINTENCLR_BTDMAINTENCLR BIT(2) |
| 51 | #define SSS_FCINTENCLR_HRDMAINTENCLR BIT(1) |
| 52 | #define SSS_FCINTENCLR_PKDMAINTENCLR BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 53 | |
| 54 | #define SSS_REG_FCINTPEND 0x000C |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 55 | #define SSS_FCINTPEND_BRDMAINTP BIT(3) |
| 56 | #define SSS_FCINTPEND_BTDMAINTP BIT(2) |
| 57 | #define SSS_FCINTPEND_HRDMAINTP BIT(1) |
| 58 | #define SSS_FCINTPEND_PKDMAINTP BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 59 | |
| 60 | #define SSS_REG_FCFIFOSTAT 0x0010 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 61 | #define SSS_FCFIFOSTAT_BRFIFOFUL BIT(7) |
| 62 | #define SSS_FCFIFOSTAT_BRFIFOEMP BIT(6) |
| 63 | #define SSS_FCFIFOSTAT_BTFIFOFUL BIT(5) |
| 64 | #define SSS_FCFIFOSTAT_BTFIFOEMP BIT(4) |
| 65 | #define SSS_FCFIFOSTAT_HRFIFOFUL BIT(3) |
| 66 | #define SSS_FCFIFOSTAT_HRFIFOEMP BIT(2) |
| 67 | #define SSS_FCFIFOSTAT_PKFIFOFUL BIT(1) |
| 68 | #define SSS_FCFIFOSTAT_PKFIFOEMP BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 69 | |
| 70 | #define SSS_REG_FCFIFOCTRL 0x0014 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 71 | #define SSS_FCFIFOCTRL_DESSEL BIT(2) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 72 | #define SSS_HASHIN_INDEPENDENT _SBF(0, 0x00) |
| 73 | #define SSS_HASHIN_CIPHER_INPUT _SBF(0, 0x01) |
| 74 | #define SSS_HASHIN_CIPHER_OUTPUT _SBF(0, 0x02) |
| 75 | |
| 76 | #define SSS_REG_FCBRDMAS 0x0020 |
| 77 | #define SSS_REG_FCBRDMAL 0x0024 |
| 78 | #define SSS_REG_FCBRDMAC 0x0028 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 79 | #define SSS_FCBRDMAC_BYTESWAP BIT(1) |
| 80 | #define SSS_FCBRDMAC_FLUSH BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 81 | |
| 82 | #define SSS_REG_FCBTDMAS 0x0030 |
| 83 | #define SSS_REG_FCBTDMAL 0x0034 |
| 84 | #define SSS_REG_FCBTDMAC 0x0038 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 85 | #define SSS_FCBTDMAC_BYTESWAP BIT(1) |
| 86 | #define SSS_FCBTDMAC_FLUSH BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 87 | |
| 88 | #define SSS_REG_FCHRDMAS 0x0040 |
| 89 | #define SSS_REG_FCHRDMAL 0x0044 |
| 90 | #define SSS_REG_FCHRDMAC 0x0048 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 91 | #define SSS_FCHRDMAC_BYTESWAP BIT(1) |
| 92 | #define SSS_FCHRDMAC_FLUSH BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 93 | |
| 94 | #define SSS_REG_FCPKDMAS 0x0050 |
| 95 | #define SSS_REG_FCPKDMAL 0x0054 |
| 96 | #define SSS_REG_FCPKDMAC 0x0058 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 97 | #define SSS_FCPKDMAC_BYTESWAP BIT(3) |
| 98 | #define SSS_FCPKDMAC_DESCEND BIT(2) |
| 99 | #define SSS_FCPKDMAC_TRANSMIT BIT(1) |
| 100 | #define SSS_FCPKDMAC_FLUSH BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 101 | |
| 102 | #define SSS_REG_FCPKDMAO 0x005C |
| 103 | |
| 104 | /* AES registers */ |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 105 | #define SSS_REG_AES_CONTROL 0x00 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 106 | #define SSS_AES_BYTESWAP_DI BIT(11) |
| 107 | #define SSS_AES_BYTESWAP_DO BIT(10) |
| 108 | #define SSS_AES_BYTESWAP_IV BIT(9) |
| 109 | #define SSS_AES_BYTESWAP_CNT BIT(8) |
| 110 | #define SSS_AES_BYTESWAP_KEY BIT(7) |
| 111 | #define SSS_AES_KEY_CHANGE_MODE BIT(6) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 112 | #define SSS_AES_KEY_SIZE_128 _SBF(4, 0x00) |
| 113 | #define SSS_AES_KEY_SIZE_192 _SBF(4, 0x01) |
| 114 | #define SSS_AES_KEY_SIZE_256 _SBF(4, 0x02) |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 115 | #define SSS_AES_FIFO_MODE BIT(3) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 116 | #define SSS_AES_CHAIN_MODE_ECB _SBF(1, 0x00) |
| 117 | #define SSS_AES_CHAIN_MODE_CBC _SBF(1, 0x01) |
| 118 | #define SSS_AES_CHAIN_MODE_CTR _SBF(1, 0x02) |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 119 | #define SSS_AES_MODE_DECRYPT BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 120 | |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 121 | #define SSS_REG_AES_STATUS 0x04 |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 122 | #define SSS_AES_BUSY BIT(2) |
| 123 | #define SSS_AES_INPUT_READY BIT(1) |
| 124 | #define SSS_AES_OUTPUT_READY BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 125 | |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 126 | #define SSS_REG_AES_IN_DATA(s) (0x10 + (s << 2)) |
| 127 | #define SSS_REG_AES_OUT_DATA(s) (0x20 + (s << 2)) |
| 128 | #define SSS_REG_AES_IV_DATA(s) (0x30 + (s << 2)) |
| 129 | #define SSS_REG_AES_CNT_DATA(s) (0x40 + (s << 2)) |
| 130 | #define SSS_REG_AES_KEY_DATA(s) (0x80 + (s << 2)) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 131 | |
| 132 | #define SSS_REG(dev, reg) ((dev)->ioaddr + (SSS_REG_##reg)) |
| 133 | #define SSS_READ(dev, reg) __raw_readl(SSS_REG(dev, reg)) |
| 134 | #define SSS_WRITE(dev, reg, val) __raw_writel((val), SSS_REG(dev, reg)) |
| 135 | |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 136 | #define SSS_AES_REG(dev, reg) ((dev)->aes_ioaddr + SSS_REG_##reg) |
| 137 | #define SSS_AES_WRITE(dev, reg, val) __raw_writel((val), \ |
| 138 | SSS_AES_REG(dev, reg)) |
| 139 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 140 | /* HW engine modes */ |
Krzysztof Kozlowski | 5e00c60 | 2016-04-22 14:15:22 +0200 | [diff] [blame] | 141 | #define FLAGS_AES_DECRYPT BIT(0) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 142 | #define FLAGS_AES_MODE_MASK _SBF(1, 0x03) |
| 143 | #define FLAGS_AES_CBC _SBF(1, 0x01) |
| 144 | #define FLAGS_AES_CTR _SBF(1, 0x02) |
| 145 | |
| 146 | #define AES_KEY_LEN 16 |
| 147 | #define CRYPTO_QUEUE_LEN 1 |
| 148 | |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 149 | /** |
| 150 | * struct samsung_aes_variant - platform specific SSS driver data |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 151 | * @aes_offset: AES register offset from SSS module's base. |
| 152 | * |
| 153 | * Specifies platform specific configuration of SSS module. |
| 154 | * Note: A structure for driver specific platform data is used for future |
| 155 | * expansion of its usage. |
| 156 | */ |
| 157 | struct samsung_aes_variant { |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 158 | unsigned int aes_offset; |
| 159 | }; |
| 160 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 161 | struct s5p_aes_reqctx { |
| 162 | unsigned long mode; |
| 163 | }; |
| 164 | |
| 165 | struct s5p_aes_ctx { |
| 166 | struct s5p_aes_dev *dev; |
| 167 | |
| 168 | uint8_t aes_key[AES_MAX_KEY_SIZE]; |
| 169 | uint8_t nonce[CTR_RFC3686_NONCE_SIZE]; |
| 170 | int keylen; |
| 171 | }; |
| 172 | |
| 173 | struct s5p_aes_dev { |
| 174 | struct device *dev; |
| 175 | struct clk *clk; |
| 176 | void __iomem *ioaddr; |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 177 | void __iomem *aes_ioaddr; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 178 | int irq_fc; |
| 179 | |
| 180 | struct ablkcipher_request *req; |
| 181 | struct s5p_aes_ctx *ctx; |
| 182 | struct scatterlist *sg_src; |
| 183 | struct scatterlist *sg_dst; |
| 184 | |
Krzysztof Kozlowski | 9e4a110 | 2016-03-22 10:58:24 +0900 | [diff] [blame] | 185 | /* In case of unaligned access: */ |
| 186 | struct scatterlist *sg_src_cpy; |
| 187 | struct scatterlist *sg_dst_cpy; |
| 188 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 189 | struct tasklet_struct tasklet; |
| 190 | struct crypto_queue queue; |
| 191 | bool busy; |
| 192 | spinlock_t lock; |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 193 | |
| 194 | struct samsung_aes_variant *variant; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 195 | }; |
| 196 | |
| 197 | static struct s5p_aes_dev *s5p_dev; |
| 198 | |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 199 | static const struct samsung_aes_variant s5p_aes_data = { |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 200 | .aes_offset = 0x4000, |
| 201 | }; |
| 202 | |
| 203 | static const struct samsung_aes_variant exynos_aes_data = { |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 204 | .aes_offset = 0x200, |
| 205 | }; |
| 206 | |
Naveen Krishna Chatradhi | 6b9f16e | 2014-05-08 21:58:13 +0800 | [diff] [blame] | 207 | static const struct of_device_id s5p_sss_dt_match[] = { |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 208 | { |
| 209 | .compatible = "samsung,s5pv210-secss", |
| 210 | .data = &s5p_aes_data, |
| 211 | }, |
| 212 | { |
| 213 | .compatible = "samsung,exynos4210-secss", |
| 214 | .data = &exynos_aes_data, |
| 215 | }, |
Naveen Krishna Chatradhi | 6b9f16e | 2014-05-08 21:58:13 +0800 | [diff] [blame] | 216 | { }, |
| 217 | }; |
| 218 | MODULE_DEVICE_TABLE(of, s5p_sss_dt_match); |
| 219 | |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 220 | static inline struct samsung_aes_variant *find_s5p_sss_version |
| 221 | (struct platform_device *pdev) |
| 222 | { |
| 223 | if (IS_ENABLED(CONFIG_OF) && (pdev->dev.of_node)) { |
| 224 | const struct of_device_id *match; |
Krzysztof Koz?owski | 313becd | 2016-01-11 20:45:50 +0900 | [diff] [blame] | 225 | |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 226 | match = of_match_node(s5p_sss_dt_match, |
| 227 | pdev->dev.of_node); |
| 228 | return (struct samsung_aes_variant *)match->data; |
| 229 | } |
| 230 | return (struct samsung_aes_variant *) |
| 231 | platform_get_device_id(pdev)->driver_data; |
| 232 | } |
| 233 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 234 | static void s5p_set_dma_indata(struct s5p_aes_dev *dev, struct scatterlist *sg) |
| 235 | { |
| 236 | SSS_WRITE(dev, FCBRDMAS, sg_dma_address(sg)); |
| 237 | SSS_WRITE(dev, FCBRDMAL, sg_dma_len(sg)); |
| 238 | } |
| 239 | |
| 240 | static void s5p_set_dma_outdata(struct s5p_aes_dev *dev, struct scatterlist *sg) |
| 241 | { |
| 242 | SSS_WRITE(dev, FCBTDMAS, sg_dma_address(sg)); |
| 243 | SSS_WRITE(dev, FCBTDMAL, sg_dma_len(sg)); |
| 244 | } |
| 245 | |
Krzysztof Kozlowski | 9e4a110 | 2016-03-22 10:58:24 +0900 | [diff] [blame] | 246 | static void s5p_free_sg_cpy(struct s5p_aes_dev *dev, struct scatterlist **sg) |
| 247 | { |
| 248 | int len; |
| 249 | |
| 250 | if (!*sg) |
| 251 | return; |
| 252 | |
| 253 | len = ALIGN(dev->req->nbytes, AES_BLOCK_SIZE); |
| 254 | free_pages((unsigned long)sg_virt(*sg), get_order(len)); |
| 255 | |
| 256 | kfree(*sg); |
| 257 | *sg = NULL; |
| 258 | } |
| 259 | |
| 260 | static void s5p_sg_copy_buf(void *buf, struct scatterlist *sg, |
| 261 | unsigned int nbytes, int out) |
| 262 | { |
| 263 | struct scatter_walk walk; |
| 264 | |
| 265 | if (!nbytes) |
| 266 | return; |
| 267 | |
| 268 | scatterwalk_start(&walk, sg); |
| 269 | scatterwalk_copychunks(buf, &walk, nbytes, out); |
| 270 | scatterwalk_done(&walk, out, 0); |
| 271 | } |
| 272 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 273 | static void s5p_aes_complete(struct s5p_aes_dev *dev, int err) |
| 274 | { |
Krzysztof Kozlowski | 9e4a110 | 2016-03-22 10:58:24 +0900 | [diff] [blame] | 275 | if (dev->sg_dst_cpy) { |
| 276 | dev_dbg(dev->dev, |
| 277 | "Copying %d bytes of output data back to original place\n", |
| 278 | dev->req->nbytes); |
| 279 | s5p_sg_copy_buf(sg_virt(dev->sg_dst_cpy), dev->req->dst, |
| 280 | dev->req->nbytes, 1); |
| 281 | } |
| 282 | s5p_free_sg_cpy(dev, &dev->sg_src_cpy); |
| 283 | s5p_free_sg_cpy(dev, &dev->sg_dst_cpy); |
| 284 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 285 | /* holding a lock outside */ |
| 286 | dev->req->base.complete(&dev->req->base, err); |
| 287 | dev->busy = false; |
| 288 | } |
| 289 | |
| 290 | static void s5p_unset_outdata(struct s5p_aes_dev *dev) |
| 291 | { |
| 292 | dma_unmap_sg(dev->dev, dev->sg_dst, 1, DMA_FROM_DEVICE); |
| 293 | } |
| 294 | |
| 295 | static void s5p_unset_indata(struct s5p_aes_dev *dev) |
| 296 | { |
| 297 | dma_unmap_sg(dev->dev, dev->sg_src, 1, DMA_TO_DEVICE); |
| 298 | } |
| 299 | |
Krzysztof Kozlowski | 9e4a110 | 2016-03-22 10:58:24 +0900 | [diff] [blame] | 300 | static int s5p_make_sg_cpy(struct s5p_aes_dev *dev, struct scatterlist *src, |
| 301 | struct scatterlist **dst) |
| 302 | { |
| 303 | void *pages; |
| 304 | int len; |
| 305 | |
| 306 | *dst = kmalloc(sizeof(**dst), GFP_ATOMIC); |
| 307 | if (!*dst) |
| 308 | return -ENOMEM; |
| 309 | |
| 310 | len = ALIGN(dev->req->nbytes, AES_BLOCK_SIZE); |
| 311 | pages = (void *)__get_free_pages(GFP_ATOMIC, get_order(len)); |
| 312 | if (!pages) { |
| 313 | kfree(*dst); |
| 314 | *dst = NULL; |
| 315 | return -ENOMEM; |
| 316 | } |
| 317 | |
| 318 | s5p_sg_copy_buf(pages, src, dev->req->nbytes, 0); |
| 319 | |
| 320 | sg_init_table(*dst, 1); |
| 321 | sg_set_buf(*dst, pages, len); |
| 322 | |
| 323 | return 0; |
| 324 | } |
| 325 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 326 | static int s5p_set_outdata(struct s5p_aes_dev *dev, struct scatterlist *sg) |
| 327 | { |
| 328 | int err; |
| 329 | |
Marek Szyprowski | d149797 | 2016-04-26 09:29:26 +0200 | [diff] [blame] | 330 | if (!sg->length) { |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 331 | err = -EINVAL; |
| 332 | goto exit; |
| 333 | } |
| 334 | |
| 335 | err = dma_map_sg(dev->dev, sg, 1, DMA_FROM_DEVICE); |
| 336 | if (!err) { |
| 337 | err = -ENOMEM; |
| 338 | goto exit; |
| 339 | } |
| 340 | |
| 341 | dev->sg_dst = sg; |
| 342 | err = 0; |
| 343 | |
Krzysztof Kozlowski | 119c3ab | 2016-03-22 10:58:23 +0900 | [diff] [blame] | 344 | exit: |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 345 | return err; |
| 346 | } |
| 347 | |
| 348 | static int s5p_set_indata(struct s5p_aes_dev *dev, struct scatterlist *sg) |
| 349 | { |
| 350 | int err; |
| 351 | |
Marek Szyprowski | d149797 | 2016-04-26 09:29:26 +0200 | [diff] [blame] | 352 | if (!sg->length) { |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 353 | err = -EINVAL; |
| 354 | goto exit; |
| 355 | } |
| 356 | |
| 357 | err = dma_map_sg(dev->dev, sg, 1, DMA_TO_DEVICE); |
| 358 | if (!err) { |
| 359 | err = -ENOMEM; |
| 360 | goto exit; |
| 361 | } |
| 362 | |
| 363 | dev->sg_src = sg; |
| 364 | err = 0; |
| 365 | |
Krzysztof Kozlowski | 119c3ab | 2016-03-22 10:58:23 +0900 | [diff] [blame] | 366 | exit: |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 367 | return err; |
| 368 | } |
| 369 | |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 370 | /* |
| 371 | * Returns true if new transmitting (output) data is ready and its |
| 372 | * address+length have to be written to device (by calling |
| 373 | * s5p_set_dma_outdata()). False otherwise. |
| 374 | */ |
| 375 | static bool s5p_aes_tx(struct s5p_aes_dev *dev) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 376 | { |
| 377 | int err = 0; |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 378 | bool ret = false; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 379 | |
| 380 | s5p_unset_outdata(dev); |
| 381 | |
| 382 | if (!sg_is_last(dev->sg_dst)) { |
| 383 | err = s5p_set_outdata(dev, sg_next(dev->sg_dst)); |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 384 | if (err) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 385 | s5p_aes_complete(dev, err); |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 386 | else |
| 387 | ret = true; |
Naveen Krishna Chatradhi | dc5e3f1 | 2014-05-08 21:58:15 +0800 | [diff] [blame] | 388 | } else { |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 389 | s5p_aes_complete(dev, err); |
Naveen Krishna Chatradhi | dc5e3f1 | 2014-05-08 21:58:15 +0800 | [diff] [blame] | 390 | |
| 391 | dev->busy = true; |
| 392 | tasklet_schedule(&dev->tasklet); |
| 393 | } |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 394 | |
| 395 | return ret; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 396 | } |
| 397 | |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 398 | /* |
| 399 | * Returns true if new receiving (input) data is ready and its |
| 400 | * address+length have to be written to device (by calling |
| 401 | * s5p_set_dma_indata()). False otherwise. |
| 402 | */ |
| 403 | static bool s5p_aes_rx(struct s5p_aes_dev *dev) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 404 | { |
| 405 | int err; |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 406 | bool ret = false; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 407 | |
| 408 | s5p_unset_indata(dev); |
| 409 | |
| 410 | if (!sg_is_last(dev->sg_src)) { |
| 411 | err = s5p_set_indata(dev, sg_next(dev->sg_src)); |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 412 | if (err) |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 413 | s5p_aes_complete(dev, err); |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 414 | else |
| 415 | ret = true; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 416 | } |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 417 | |
| 418 | return ret; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 419 | } |
| 420 | |
| 421 | static irqreturn_t s5p_aes_interrupt(int irq, void *dev_id) |
| 422 | { |
| 423 | struct platform_device *pdev = dev_id; |
| 424 | struct s5p_aes_dev *dev = platform_get_drvdata(pdev); |
| 425 | uint32_t status; |
| 426 | unsigned long flags; |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 427 | bool set_dma_tx = false; |
| 428 | bool set_dma_rx = false; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 429 | |
| 430 | spin_lock_irqsave(&dev->lock, flags); |
| 431 | |
Krzysztof Kozlowski | 5512442 | 2016-04-19 15:44:12 +0200 | [diff] [blame] | 432 | status = SSS_READ(dev, FCINTSTAT); |
| 433 | if (status & SSS_FCINTSTAT_BRDMAINT) |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 434 | set_dma_rx = s5p_aes_rx(dev); |
Krzysztof Kozlowski | 5512442 | 2016-04-19 15:44:12 +0200 | [diff] [blame] | 435 | if (status & SSS_FCINTSTAT_BTDMAINT) |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 436 | set_dma_tx = s5p_aes_tx(dev); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 437 | |
Krzysztof Kozlowski | 5512442 | 2016-04-19 15:44:12 +0200 | [diff] [blame] | 438 | SSS_WRITE(dev, FCINTPEND, status); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 439 | |
Krzysztof Kozlowski | 79152e8 | 2016-04-22 14:15:23 +0200 | [diff] [blame] | 440 | /* |
| 441 | * Writing length of DMA block (either receiving or transmitting) |
| 442 | * will start the operation immediately, so this should be done |
| 443 | * at the end (even after clearing pending interrupts to not miss the |
| 444 | * interrupt). |
| 445 | */ |
| 446 | if (set_dma_tx) |
| 447 | s5p_set_dma_outdata(dev, dev->sg_dst); |
| 448 | if (set_dma_rx) |
| 449 | s5p_set_dma_indata(dev, dev->sg_src); |
| 450 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 451 | spin_unlock_irqrestore(&dev->lock, flags); |
| 452 | |
| 453 | return IRQ_HANDLED; |
| 454 | } |
| 455 | |
| 456 | static void s5p_set_aes(struct s5p_aes_dev *dev, |
| 457 | uint8_t *key, uint8_t *iv, unsigned int keylen) |
| 458 | { |
| 459 | void __iomem *keystart; |
| 460 | |
Naveen Krishna Chatradhi | 8f9702a | 2014-05-08 21:58:15 +0800 | [diff] [blame] | 461 | if (iv) |
Krzysztof Koz?owski | 1e3012d | 2016-01-11 20:45:51 +0900 | [diff] [blame] | 462 | memcpy_toio(dev->aes_ioaddr + SSS_REG_AES_IV_DATA(0), iv, 0x10); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 463 | |
| 464 | if (keylen == AES_KEYSIZE_256) |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 465 | keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(0); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 466 | else if (keylen == AES_KEYSIZE_192) |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 467 | keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(2); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 468 | else |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 469 | keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(4); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 470 | |
Krzysztof Koz?owski | 1e3012d | 2016-01-11 20:45:51 +0900 | [diff] [blame] | 471 | memcpy_toio(keystart, key, keylen); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 472 | } |
| 473 | |
Krzysztof Kozlowski | 9e4a110 | 2016-03-22 10:58:24 +0900 | [diff] [blame] | 474 | static bool s5p_is_sg_aligned(struct scatterlist *sg) |
| 475 | { |
| 476 | while (sg) { |
Marek Szyprowski | d149797 | 2016-04-26 09:29:26 +0200 | [diff] [blame] | 477 | if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE)) |
Krzysztof Kozlowski | 9e4a110 | 2016-03-22 10:58:24 +0900 | [diff] [blame] | 478 | return false; |
| 479 | sg = sg_next(sg); |
| 480 | } |
| 481 | |
| 482 | return true; |
| 483 | } |
| 484 | |
| 485 | static int s5p_set_indata_start(struct s5p_aes_dev *dev, |
| 486 | struct ablkcipher_request *req) |
| 487 | { |
| 488 | struct scatterlist *sg; |
| 489 | int err; |
| 490 | |
| 491 | dev->sg_src_cpy = NULL; |
| 492 | sg = req->src; |
| 493 | if (!s5p_is_sg_aligned(sg)) { |
| 494 | dev_dbg(dev->dev, |
| 495 | "At least one unaligned source scatter list, making a copy\n"); |
| 496 | err = s5p_make_sg_cpy(dev, sg, &dev->sg_src_cpy); |
| 497 | if (err) |
| 498 | return err; |
| 499 | |
| 500 | sg = dev->sg_src_cpy; |
| 501 | } |
| 502 | |
| 503 | err = s5p_set_indata(dev, sg); |
| 504 | if (err) { |
| 505 | s5p_free_sg_cpy(dev, &dev->sg_src_cpy); |
| 506 | return err; |
| 507 | } |
| 508 | |
| 509 | return 0; |
| 510 | } |
| 511 | |
| 512 | static int s5p_set_outdata_start(struct s5p_aes_dev *dev, |
| 513 | struct ablkcipher_request *req) |
| 514 | { |
| 515 | struct scatterlist *sg; |
| 516 | int err; |
| 517 | |
| 518 | dev->sg_dst_cpy = NULL; |
| 519 | sg = req->dst; |
| 520 | if (!s5p_is_sg_aligned(sg)) { |
| 521 | dev_dbg(dev->dev, |
| 522 | "At least one unaligned dest scatter list, making a copy\n"); |
| 523 | err = s5p_make_sg_cpy(dev, sg, &dev->sg_dst_cpy); |
| 524 | if (err) |
| 525 | return err; |
| 526 | |
| 527 | sg = dev->sg_dst_cpy; |
| 528 | } |
| 529 | |
| 530 | err = s5p_set_outdata(dev, sg); |
| 531 | if (err) { |
| 532 | s5p_free_sg_cpy(dev, &dev->sg_dst_cpy); |
| 533 | return err; |
| 534 | } |
| 535 | |
| 536 | return 0; |
| 537 | } |
| 538 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 539 | static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) |
| 540 | { |
| 541 | struct ablkcipher_request *req = dev->req; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 542 | uint32_t aes_control; |
| 543 | int err; |
| 544 | unsigned long flags; |
| 545 | |
| 546 | aes_control = SSS_AES_KEY_CHANGE_MODE; |
| 547 | if (mode & FLAGS_AES_DECRYPT) |
| 548 | aes_control |= SSS_AES_MODE_DECRYPT; |
| 549 | |
| 550 | if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) |
| 551 | aes_control |= SSS_AES_CHAIN_MODE_CBC; |
| 552 | else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) |
| 553 | aes_control |= SSS_AES_CHAIN_MODE_CTR; |
| 554 | |
| 555 | if (dev->ctx->keylen == AES_KEYSIZE_192) |
| 556 | aes_control |= SSS_AES_KEY_SIZE_192; |
| 557 | else if (dev->ctx->keylen == AES_KEYSIZE_256) |
| 558 | aes_control |= SSS_AES_KEY_SIZE_256; |
| 559 | |
| 560 | aes_control |= SSS_AES_FIFO_MODE; |
| 561 | |
| 562 | /* as a variant it is possible to use byte swapping on DMA side */ |
| 563 | aes_control |= SSS_AES_BYTESWAP_DI |
| 564 | | SSS_AES_BYTESWAP_DO |
| 565 | | SSS_AES_BYTESWAP_IV |
| 566 | | SSS_AES_BYTESWAP_KEY |
| 567 | | SSS_AES_BYTESWAP_CNT; |
| 568 | |
| 569 | spin_lock_irqsave(&dev->lock, flags); |
| 570 | |
| 571 | SSS_WRITE(dev, FCINTENCLR, |
| 572 | SSS_FCINTENCLR_BTDMAINTENCLR | SSS_FCINTENCLR_BRDMAINTENCLR); |
| 573 | SSS_WRITE(dev, FCFIFOCTRL, 0x00); |
| 574 | |
Krzysztof Kozlowski | 9e4a110 | 2016-03-22 10:58:24 +0900 | [diff] [blame] | 575 | err = s5p_set_indata_start(dev, req); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 576 | if (err) |
| 577 | goto indata_error; |
| 578 | |
Krzysztof Kozlowski | 9e4a110 | 2016-03-22 10:58:24 +0900 | [diff] [blame] | 579 | err = s5p_set_outdata_start(dev, req); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 580 | if (err) |
| 581 | goto outdata_error; |
| 582 | |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 583 | SSS_AES_WRITE(dev, AES_CONTROL, aes_control); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 584 | s5p_set_aes(dev, dev->ctx->aes_key, req->info, dev->ctx->keylen); |
| 585 | |
Krzysztof Kozlowski | 9e4a110 | 2016-03-22 10:58:24 +0900 | [diff] [blame] | 586 | s5p_set_dma_indata(dev, dev->sg_src); |
| 587 | s5p_set_dma_outdata(dev, dev->sg_dst); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 588 | |
| 589 | SSS_WRITE(dev, FCINTENSET, |
| 590 | SSS_FCINTENSET_BTDMAINTENSET | SSS_FCINTENSET_BRDMAINTENSET); |
| 591 | |
| 592 | spin_unlock_irqrestore(&dev->lock, flags); |
| 593 | |
| 594 | return; |
| 595 | |
Krzysztof Kozlowski | 119c3ab | 2016-03-22 10:58:23 +0900 | [diff] [blame] | 596 | outdata_error: |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 597 | s5p_unset_indata(dev); |
| 598 | |
Krzysztof Kozlowski | 119c3ab | 2016-03-22 10:58:23 +0900 | [diff] [blame] | 599 | indata_error: |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 600 | s5p_aes_complete(dev, err); |
| 601 | spin_unlock_irqrestore(&dev->lock, flags); |
| 602 | } |
| 603 | |
| 604 | static void s5p_tasklet_cb(unsigned long data) |
| 605 | { |
| 606 | struct s5p_aes_dev *dev = (struct s5p_aes_dev *)data; |
| 607 | struct crypto_async_request *async_req, *backlog; |
| 608 | struct s5p_aes_reqctx *reqctx; |
| 609 | unsigned long flags; |
| 610 | |
| 611 | spin_lock_irqsave(&dev->lock, flags); |
| 612 | backlog = crypto_get_backlog(&dev->queue); |
| 613 | async_req = crypto_dequeue_request(&dev->queue); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 614 | |
Naveen Krishna Chatradhi | dc5e3f1 | 2014-05-08 21:58:15 +0800 | [diff] [blame] | 615 | if (!async_req) { |
| 616 | dev->busy = false; |
| 617 | spin_unlock_irqrestore(&dev->lock, flags); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 618 | return; |
Naveen Krishna Chatradhi | dc5e3f1 | 2014-05-08 21:58:15 +0800 | [diff] [blame] | 619 | } |
| 620 | spin_unlock_irqrestore(&dev->lock, flags); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 621 | |
| 622 | if (backlog) |
| 623 | backlog->complete(backlog, -EINPROGRESS); |
| 624 | |
| 625 | dev->req = ablkcipher_request_cast(async_req); |
| 626 | dev->ctx = crypto_tfm_ctx(dev->req->base.tfm); |
| 627 | reqctx = ablkcipher_request_ctx(dev->req); |
| 628 | |
| 629 | s5p_aes_crypt_start(dev, reqctx->mode); |
| 630 | } |
| 631 | |
| 632 | static int s5p_aes_handle_req(struct s5p_aes_dev *dev, |
| 633 | struct ablkcipher_request *req) |
| 634 | { |
| 635 | unsigned long flags; |
| 636 | int err; |
| 637 | |
| 638 | spin_lock_irqsave(&dev->lock, flags); |
Naveen Krishna Chatradhi | dc5e3f1 | 2014-05-08 21:58:15 +0800 | [diff] [blame] | 639 | err = ablkcipher_enqueue_request(&dev->queue, req); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 640 | if (dev->busy) { |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 641 | spin_unlock_irqrestore(&dev->lock, flags); |
| 642 | goto exit; |
| 643 | } |
| 644 | dev->busy = true; |
| 645 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 646 | spin_unlock_irqrestore(&dev->lock, flags); |
| 647 | |
| 648 | tasklet_schedule(&dev->tasklet); |
| 649 | |
Krzysztof Kozlowski | 119c3ab | 2016-03-22 10:58:23 +0900 | [diff] [blame] | 650 | exit: |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 651 | return err; |
| 652 | } |
| 653 | |
| 654 | static int s5p_aes_crypt(struct ablkcipher_request *req, unsigned long mode) |
| 655 | { |
| 656 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| 657 | struct s5p_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 658 | struct s5p_aes_reqctx *reqctx = ablkcipher_request_ctx(req); |
| 659 | struct s5p_aes_dev *dev = ctx->dev; |
| 660 | |
| 661 | if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) { |
Krzysztof Koz?owski | 313becd | 2016-01-11 20:45:50 +0900 | [diff] [blame] | 662 | dev_err(dev->dev, "request size is not exact amount of AES blocks\n"); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 663 | return -EINVAL; |
| 664 | } |
| 665 | |
| 666 | reqctx->mode = mode; |
| 667 | |
| 668 | return s5p_aes_handle_req(dev, req); |
| 669 | } |
| 670 | |
| 671 | static int s5p_aes_setkey(struct crypto_ablkcipher *cipher, |
| 672 | const uint8_t *key, unsigned int keylen) |
| 673 | { |
| 674 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); |
| 675 | struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
| 676 | |
| 677 | if (keylen != AES_KEYSIZE_128 && |
| 678 | keylen != AES_KEYSIZE_192 && |
| 679 | keylen != AES_KEYSIZE_256) |
| 680 | return -EINVAL; |
| 681 | |
| 682 | memcpy(ctx->aes_key, key, keylen); |
| 683 | ctx->keylen = keylen; |
| 684 | |
| 685 | return 0; |
| 686 | } |
| 687 | |
| 688 | static int s5p_aes_ecb_encrypt(struct ablkcipher_request *req) |
| 689 | { |
| 690 | return s5p_aes_crypt(req, 0); |
| 691 | } |
| 692 | |
| 693 | static int s5p_aes_ecb_decrypt(struct ablkcipher_request *req) |
| 694 | { |
| 695 | return s5p_aes_crypt(req, FLAGS_AES_DECRYPT); |
| 696 | } |
| 697 | |
| 698 | static int s5p_aes_cbc_encrypt(struct ablkcipher_request *req) |
| 699 | { |
| 700 | return s5p_aes_crypt(req, FLAGS_AES_CBC); |
| 701 | } |
| 702 | |
| 703 | static int s5p_aes_cbc_decrypt(struct ablkcipher_request *req) |
| 704 | { |
| 705 | return s5p_aes_crypt(req, FLAGS_AES_DECRYPT | FLAGS_AES_CBC); |
| 706 | } |
| 707 | |
| 708 | static int s5p_aes_cra_init(struct crypto_tfm *tfm) |
| 709 | { |
Krzysztof Koz?owski | 313becd | 2016-01-11 20:45:50 +0900 | [diff] [blame] | 710 | struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 711 | |
| 712 | ctx->dev = s5p_dev; |
| 713 | tfm->crt_ablkcipher.reqsize = sizeof(struct s5p_aes_reqctx); |
| 714 | |
| 715 | return 0; |
| 716 | } |
| 717 | |
| 718 | static struct crypto_alg algs[] = { |
| 719 | { |
| 720 | .cra_name = "ecb(aes)", |
| 721 | .cra_driver_name = "ecb-aes-s5p", |
| 722 | .cra_priority = 100, |
| 723 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
Nikos Mavrogiannopoulos | d912bb7 | 2011-11-01 13:39:56 +0100 | [diff] [blame] | 724 | CRYPTO_ALG_ASYNC | |
| 725 | CRYPTO_ALG_KERN_DRIVER_ONLY, |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 726 | .cra_blocksize = AES_BLOCK_SIZE, |
| 727 | .cra_ctxsize = sizeof(struct s5p_aes_ctx), |
| 728 | .cra_alignmask = 0x0f, |
| 729 | .cra_type = &crypto_ablkcipher_type, |
| 730 | .cra_module = THIS_MODULE, |
| 731 | .cra_init = s5p_aes_cra_init, |
| 732 | .cra_u.ablkcipher = { |
| 733 | .min_keysize = AES_MIN_KEY_SIZE, |
| 734 | .max_keysize = AES_MAX_KEY_SIZE, |
| 735 | .setkey = s5p_aes_setkey, |
| 736 | .encrypt = s5p_aes_ecb_encrypt, |
| 737 | .decrypt = s5p_aes_ecb_decrypt, |
| 738 | } |
| 739 | }, |
| 740 | { |
| 741 | .cra_name = "cbc(aes)", |
| 742 | .cra_driver_name = "cbc-aes-s5p", |
| 743 | .cra_priority = 100, |
| 744 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
Nikos Mavrogiannopoulos | d912bb7 | 2011-11-01 13:39:56 +0100 | [diff] [blame] | 745 | CRYPTO_ALG_ASYNC | |
| 746 | CRYPTO_ALG_KERN_DRIVER_ONLY, |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 747 | .cra_blocksize = AES_BLOCK_SIZE, |
| 748 | .cra_ctxsize = sizeof(struct s5p_aes_ctx), |
| 749 | .cra_alignmask = 0x0f, |
| 750 | .cra_type = &crypto_ablkcipher_type, |
| 751 | .cra_module = THIS_MODULE, |
| 752 | .cra_init = s5p_aes_cra_init, |
| 753 | .cra_u.ablkcipher = { |
| 754 | .min_keysize = AES_MIN_KEY_SIZE, |
| 755 | .max_keysize = AES_MAX_KEY_SIZE, |
| 756 | .ivsize = AES_BLOCK_SIZE, |
| 757 | .setkey = s5p_aes_setkey, |
| 758 | .encrypt = s5p_aes_cbc_encrypt, |
| 759 | .decrypt = s5p_aes_cbc_decrypt, |
| 760 | } |
| 761 | }, |
| 762 | }; |
| 763 | |
| 764 | static int s5p_aes_probe(struct platform_device *pdev) |
| 765 | { |
| 766 | int i, j, err = -ENODEV; |
| 767 | struct s5p_aes_dev *pdata; |
| 768 | struct device *dev = &pdev->dev; |
| 769 | struct resource *res; |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 770 | struct samsung_aes_variant *variant; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 771 | |
| 772 | if (s5p_dev) |
| 773 | return -EEXIST; |
| 774 | |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 775 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
| 776 | if (!pdata) |
| 777 | return -ENOMEM; |
| 778 | |
Jingoo Han | 0fdefe2 | 2014-02-12 13:24:57 +0900 | [diff] [blame] | 779 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 780 | pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res); |
| 781 | if (IS_ERR(pdata->ioaddr)) |
| 782 | return PTR_ERR(pdata->ioaddr); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 783 | |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 784 | variant = find_s5p_sss_version(pdev); |
| 785 | |
Jingoo Han | 5c22ba6 | 2013-01-10 11:05:30 +0900 | [diff] [blame] | 786 | pdata->clk = devm_clk_get(dev, "secss"); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 787 | if (IS_ERR(pdata->clk)) { |
| 788 | dev_err(dev, "failed to find secss clock source\n"); |
| 789 | return -ENOENT; |
| 790 | } |
| 791 | |
Naveen Krishna Chatradhi | c1eb7ef | 2014-05-08 21:58:15 +0800 | [diff] [blame] | 792 | err = clk_prepare_enable(pdata->clk); |
| 793 | if (err < 0) { |
| 794 | dev_err(dev, "Enabling SSS clk failed, err %d\n", err); |
| 795 | return err; |
| 796 | } |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 797 | |
| 798 | spin_lock_init(&pdata->lock); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 799 | |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 800 | pdata->aes_ioaddr = pdata->ioaddr + variant->aes_offset; |
| 801 | |
Naveen Krishna Chatradhi | 96fc70b | 2014-05-08 21:58:12 +0800 | [diff] [blame] | 802 | pdata->irq_fc = platform_get_irq(pdev, 0); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 803 | if (pdata->irq_fc < 0) { |
| 804 | err = pdata->irq_fc; |
| 805 | dev_warn(dev, "feed control interrupt is not available.\n"); |
| 806 | goto err_irq; |
| 807 | } |
| 808 | err = devm_request_irq(dev, pdata->irq_fc, s5p_aes_interrupt, |
| 809 | IRQF_SHARED, pdev->name, pdev); |
| 810 | if (err < 0) { |
| 811 | dev_warn(dev, "feed control interrupt is not available.\n"); |
| 812 | goto err_irq; |
| 813 | } |
| 814 | |
Naveen Krishna Chatradhi | dc5e3f1 | 2014-05-08 21:58:15 +0800 | [diff] [blame] | 815 | pdata->busy = false; |
Naveen Krishna Chatradhi | 8924510 | 2014-05-08 21:58:14 +0800 | [diff] [blame] | 816 | pdata->variant = variant; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 817 | pdata->dev = dev; |
| 818 | platform_set_drvdata(pdev, pdata); |
| 819 | s5p_dev = pdata; |
| 820 | |
| 821 | tasklet_init(&pdata->tasklet, s5p_tasklet_cb, (unsigned long)pdata); |
| 822 | crypto_init_queue(&pdata->queue, CRYPTO_QUEUE_LEN); |
| 823 | |
| 824 | for (i = 0; i < ARRAY_SIZE(algs); i++) { |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 825 | err = crypto_register_alg(&algs[i]); |
| 826 | if (err) |
| 827 | goto err_algs; |
| 828 | } |
| 829 | |
Krzysztof Koz?owski | 313becd | 2016-01-11 20:45:50 +0900 | [diff] [blame] | 830 | dev_info(dev, "s5p-sss driver registered\n"); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 831 | |
| 832 | return 0; |
| 833 | |
Krzysztof Kozlowski | 119c3ab | 2016-03-22 10:58:23 +0900 | [diff] [blame] | 834 | err_algs: |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 835 | dev_err(dev, "can't register '%s': %d\n", algs[i].cra_name, err); |
| 836 | |
| 837 | for (j = 0; j < i; j++) |
| 838 | crypto_unregister_alg(&algs[j]); |
| 839 | |
| 840 | tasklet_kill(&pdata->tasklet); |
| 841 | |
Krzysztof Kozlowski | 119c3ab | 2016-03-22 10:58:23 +0900 | [diff] [blame] | 842 | err_irq: |
Naveen Krishna Chatradhi | c1eb7ef | 2014-05-08 21:58:15 +0800 | [diff] [blame] | 843 | clk_disable_unprepare(pdata->clk); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 844 | |
| 845 | s5p_dev = NULL; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 846 | |
| 847 | return err; |
| 848 | } |
| 849 | |
| 850 | static int s5p_aes_remove(struct platform_device *pdev) |
| 851 | { |
| 852 | struct s5p_aes_dev *pdata = platform_get_drvdata(pdev); |
| 853 | int i; |
| 854 | |
| 855 | if (!pdata) |
| 856 | return -ENODEV; |
| 857 | |
| 858 | for (i = 0; i < ARRAY_SIZE(algs); i++) |
| 859 | crypto_unregister_alg(&algs[i]); |
| 860 | |
| 861 | tasklet_kill(&pdata->tasklet); |
| 862 | |
Naveen Krishna Chatradhi | c1eb7ef | 2014-05-08 21:58:15 +0800 | [diff] [blame] | 863 | clk_disable_unprepare(pdata->clk); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 864 | |
| 865 | s5p_dev = NULL; |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 866 | |
| 867 | return 0; |
| 868 | } |
| 869 | |
| 870 | static struct platform_driver s5p_aes_crypto = { |
| 871 | .probe = s5p_aes_probe, |
| 872 | .remove = s5p_aes_remove, |
| 873 | .driver = { |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 874 | .name = "s5p-secss", |
Naveen Krishna Chatradhi | 6b9f16e | 2014-05-08 21:58:13 +0800 | [diff] [blame] | 875 | .of_match_table = s5p_sss_dt_match, |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 876 | }, |
| 877 | }; |
| 878 | |
Axel Lin | 741e8c2 | 2011-11-26 21:26:19 +0800 | [diff] [blame] | 879 | module_platform_driver(s5p_aes_crypto); |
Vladimir Zapolskiy | a49e490 | 2011-04-08 20:40:51 +0800 | [diff] [blame] | 880 | |
| 881 | MODULE_DESCRIPTION("S5PV210 AES hw acceleration support."); |
| 882 | MODULE_LICENSE("GPL v2"); |
| 883 | MODULE_AUTHOR("Vladimir Zapolskiy <vzapolskiy@gmail.com>"); |