Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * Support for ATMEL AES HW acceleration. |
| 5 | * |
| 6 | * Copyright (c) 2012 Eukréa Electromatique - ATMEL |
| 7 | * Author: Nicolas Royer <nicolas@eukrea.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as published |
| 11 | * by the Free Software Foundation. |
| 12 | * |
| 13 | * Some ideas are from omap-aes.c driver. |
| 14 | */ |
| 15 | |
| 16 | |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/err.h> |
| 21 | #include <linux/clk.h> |
| 22 | #include <linux/io.h> |
| 23 | #include <linux/hw_random.h> |
| 24 | #include <linux/platform_device.h> |
| 25 | |
| 26 | #include <linux/device.h> |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 27 | #include <linux/init.h> |
| 28 | #include <linux/errno.h> |
| 29 | #include <linux/interrupt.h> |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 30 | #include <linux/irq.h> |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 31 | #include <linux/scatterlist.h> |
| 32 | #include <linux/dma-mapping.h> |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 33 | #include <linux/of_device.h> |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 34 | #include <linux/delay.h> |
| 35 | #include <linux/crypto.h> |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 36 | #include <crypto/scatterwalk.h> |
| 37 | #include <crypto/algapi.h> |
| 38 | #include <crypto/aes.h> |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 39 | #include <linux/platform_data/crypto-atmel.h> |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 40 | #include <dt-bindings/dma/at91.h> |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 41 | #include "atmel-aes-regs.h" |
| 42 | |
Cyrille Pitchen | 88efd9a | 2015-12-17 17:48:34 +0100 | [diff] [blame] | 43 | #define ATMEL_AES_PRIORITY 300 |
| 44 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 45 | #define CFB8_BLOCK_SIZE 1 |
| 46 | #define CFB16_BLOCK_SIZE 2 |
| 47 | #define CFB32_BLOCK_SIZE 4 |
| 48 | #define CFB64_BLOCK_SIZE 8 |
| 49 | |
| 50 | /* AES flags */ |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 51 | #define AES_FLAGS_MODE_MASK 0x03ff |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 52 | #define AES_FLAGS_ENCRYPT BIT(0) |
| 53 | #define AES_FLAGS_CBC BIT(1) |
| 54 | #define AES_FLAGS_CFB BIT(2) |
| 55 | #define AES_FLAGS_CFB8 BIT(3) |
| 56 | #define AES_FLAGS_CFB16 BIT(4) |
| 57 | #define AES_FLAGS_CFB32 BIT(5) |
| 58 | #define AES_FLAGS_CFB64 BIT(6) |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 59 | #define AES_FLAGS_CFB128 BIT(7) |
| 60 | #define AES_FLAGS_OFB BIT(8) |
| 61 | #define AES_FLAGS_CTR BIT(9) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 62 | |
| 63 | #define AES_FLAGS_INIT BIT(16) |
| 64 | #define AES_FLAGS_DMA BIT(17) |
| 65 | #define AES_FLAGS_BUSY BIT(18) |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 66 | #define AES_FLAGS_FAST BIT(19) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 67 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 68 | #define ATMEL_AES_QUEUE_LENGTH 50 |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 69 | |
| 70 | #define ATMEL_AES_DMA_THRESHOLD 16 |
| 71 | |
| 72 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 73 | struct atmel_aes_caps { |
| 74 | bool has_dualbuff; |
| 75 | bool has_cfb64; |
| 76 | u32 max_burst_size; |
| 77 | }; |
| 78 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 79 | struct atmel_aes_dev; |
| 80 | |
| 81 | struct atmel_aes_ctx { |
| 82 | struct atmel_aes_dev *dd; |
| 83 | |
| 84 | int keylen; |
| 85 | u32 key[AES_KEYSIZE_256 / sizeof(u32)]; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 86 | |
| 87 | u16 block_size; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 88 | }; |
| 89 | |
| 90 | struct atmel_aes_reqctx { |
| 91 | unsigned long mode; |
| 92 | }; |
| 93 | |
| 94 | struct atmel_aes_dma { |
| 95 | struct dma_chan *chan; |
| 96 | struct dma_slave_config dma_conf; |
| 97 | }; |
| 98 | |
| 99 | struct atmel_aes_dev { |
| 100 | struct list_head list; |
| 101 | unsigned long phys_base; |
| 102 | void __iomem *io_base; |
| 103 | |
| 104 | struct atmel_aes_ctx *ctx; |
| 105 | struct device *dev; |
| 106 | struct clk *iclk; |
| 107 | int irq; |
| 108 | |
| 109 | unsigned long flags; |
| 110 | int err; |
| 111 | |
| 112 | spinlock_t lock; |
| 113 | struct crypto_queue queue; |
| 114 | |
| 115 | struct tasklet_struct done_task; |
| 116 | struct tasklet_struct queue_task; |
| 117 | |
| 118 | struct ablkcipher_request *req; |
| 119 | size_t total; |
| 120 | |
| 121 | struct scatterlist *in_sg; |
| 122 | unsigned int nb_in_sg; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 123 | size_t in_offset; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 124 | struct scatterlist *out_sg; |
| 125 | unsigned int nb_out_sg; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 126 | size_t out_offset; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 127 | |
| 128 | size_t bufcnt; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 129 | size_t buflen; |
| 130 | size_t dma_size; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 131 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 132 | void *buf_in; |
| 133 | int dma_in; |
| 134 | dma_addr_t dma_addr_in; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 135 | struct atmel_aes_dma dma_lch_in; |
| 136 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 137 | void *buf_out; |
| 138 | int dma_out; |
| 139 | dma_addr_t dma_addr_out; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 140 | struct atmel_aes_dma dma_lch_out; |
| 141 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 142 | struct atmel_aes_caps caps; |
| 143 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 144 | u32 hw_version; |
| 145 | }; |
| 146 | |
| 147 | struct atmel_aes_drv { |
| 148 | struct list_head dev_list; |
| 149 | spinlock_t lock; |
| 150 | }; |
| 151 | |
| 152 | static struct atmel_aes_drv atmel_aes = { |
| 153 | .dev_list = LIST_HEAD_INIT(atmel_aes.dev_list), |
| 154 | .lock = __SPIN_LOCK_UNLOCKED(atmel_aes.lock), |
| 155 | }; |
| 156 | |
| 157 | static int atmel_aes_sg_length(struct ablkcipher_request *req, |
| 158 | struct scatterlist *sg) |
| 159 | { |
| 160 | unsigned int total = req->nbytes; |
| 161 | int sg_nb; |
| 162 | unsigned int len; |
| 163 | struct scatterlist *sg_list; |
| 164 | |
| 165 | sg_nb = 0; |
| 166 | sg_list = sg; |
| 167 | total = req->nbytes; |
| 168 | |
| 169 | while (total) { |
| 170 | len = min(sg_list->length, total); |
| 171 | |
| 172 | sg_nb++; |
| 173 | total -= len; |
| 174 | |
| 175 | sg_list = sg_next(sg_list); |
| 176 | if (!sg_list) |
| 177 | total = 0; |
| 178 | } |
| 179 | |
| 180 | return sg_nb; |
| 181 | } |
| 182 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 183 | static int atmel_aes_sg_copy(struct scatterlist **sg, size_t *offset, |
| 184 | void *buf, size_t buflen, size_t total, int out) |
| 185 | { |
Arnd Bergmann | 20ecae7 | 2015-11-17 10:22:06 +0100 | [diff] [blame] | 186 | size_t count, off = 0; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 187 | |
| 188 | while (buflen && total) { |
| 189 | count = min((*sg)->length - *offset, total); |
| 190 | count = min(count, buflen); |
| 191 | |
| 192 | if (!count) |
| 193 | return off; |
| 194 | |
| 195 | scatterwalk_map_and_copy(buf + off, *sg, *offset, count, out); |
| 196 | |
| 197 | off += count; |
| 198 | buflen -= count; |
| 199 | *offset += count; |
| 200 | total -= count; |
| 201 | |
| 202 | if (*offset == (*sg)->length) { |
| 203 | *sg = sg_next(*sg); |
| 204 | if (*sg) |
| 205 | *offset = 0; |
| 206 | else |
| 207 | total = 0; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | return off; |
| 212 | } |
| 213 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 214 | static inline u32 atmel_aes_read(struct atmel_aes_dev *dd, u32 offset) |
| 215 | { |
| 216 | return readl_relaxed(dd->io_base + offset); |
| 217 | } |
| 218 | |
| 219 | static inline void atmel_aes_write(struct atmel_aes_dev *dd, |
| 220 | u32 offset, u32 value) |
| 221 | { |
| 222 | writel_relaxed(value, dd->io_base + offset); |
| 223 | } |
| 224 | |
| 225 | static void atmel_aes_read_n(struct atmel_aes_dev *dd, u32 offset, |
| 226 | u32 *value, int count) |
| 227 | { |
| 228 | for (; count--; value++, offset += 4) |
| 229 | *value = atmel_aes_read(dd, offset); |
| 230 | } |
| 231 | |
| 232 | static void atmel_aes_write_n(struct atmel_aes_dev *dd, u32 offset, |
Cyrille Pitchen | c0b28d8 | 2015-12-17 17:48:33 +0100 | [diff] [blame] | 233 | const u32 *value, int count) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 234 | { |
| 235 | for (; count--; value++, offset += 4) |
| 236 | atmel_aes_write(dd, offset, *value); |
| 237 | } |
| 238 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 239 | static struct atmel_aes_dev *atmel_aes_find_dev(struct atmel_aes_ctx *ctx) |
| 240 | { |
| 241 | struct atmel_aes_dev *aes_dd = NULL; |
| 242 | struct atmel_aes_dev *tmp; |
| 243 | |
| 244 | spin_lock_bh(&atmel_aes.lock); |
| 245 | if (!ctx->dd) { |
| 246 | list_for_each_entry(tmp, &atmel_aes.dev_list, list) { |
| 247 | aes_dd = tmp; |
| 248 | break; |
| 249 | } |
| 250 | ctx->dd = aes_dd; |
| 251 | } else { |
| 252 | aes_dd = ctx->dd; |
| 253 | } |
| 254 | |
| 255 | spin_unlock_bh(&atmel_aes.lock); |
| 256 | |
| 257 | return aes_dd; |
| 258 | } |
| 259 | |
| 260 | static int atmel_aes_hw_init(struct atmel_aes_dev *dd) |
| 261 | { |
LABBE Corentin | 9d83d29 | 2015-10-02 14:12:58 +0200 | [diff] [blame] | 262 | int err; |
| 263 | |
| 264 | err = clk_prepare_enable(dd->iclk); |
| 265 | if (err) |
| 266 | return err; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 267 | |
| 268 | if (!(dd->flags & AES_FLAGS_INIT)) { |
| 269 | atmel_aes_write(dd, AES_CR, AES_CR_SWRST); |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 270 | atmel_aes_write(dd, AES_MR, 0xE << AES_MR_CKEY_OFFSET); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 271 | dd->flags |= AES_FLAGS_INIT; |
| 272 | dd->err = 0; |
| 273 | } |
| 274 | |
| 275 | return 0; |
| 276 | } |
| 277 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 278 | static inline unsigned int atmel_aes_get_version(struct atmel_aes_dev *dd) |
| 279 | { |
| 280 | return atmel_aes_read(dd, AES_HW_VERSION) & 0x00000fff; |
| 281 | } |
| 282 | |
Cyrille Pitchen | aab0a39 | 2015-12-17 17:48:37 +0100 | [diff] [blame] | 283 | static int atmel_aes_hw_version_init(struct atmel_aes_dev *dd) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 284 | { |
Cyrille Pitchen | aab0a39 | 2015-12-17 17:48:37 +0100 | [diff] [blame] | 285 | int err; |
| 286 | |
| 287 | err = atmel_aes_hw_init(dd); |
| 288 | if (err) |
| 289 | return err; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 290 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 291 | dd->hw_version = atmel_aes_get_version(dd); |
| 292 | |
Cyrille Pitchen | aab0a39 | 2015-12-17 17:48:37 +0100 | [diff] [blame] | 293 | dev_info(dd->dev, "version: 0x%x\n", dd->hw_version); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 294 | |
| 295 | clk_disable_unprepare(dd->iclk); |
Cyrille Pitchen | aab0a39 | 2015-12-17 17:48:37 +0100 | [diff] [blame] | 296 | return 0; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | static void atmel_aes_finish_req(struct atmel_aes_dev *dd, int err) |
| 300 | { |
| 301 | struct ablkcipher_request *req = dd->req; |
| 302 | |
| 303 | clk_disable_unprepare(dd->iclk); |
| 304 | dd->flags &= ~AES_FLAGS_BUSY; |
| 305 | |
| 306 | req->base.complete(&req->base, err); |
| 307 | } |
| 308 | |
| 309 | static void atmel_aes_dma_callback(void *data) |
| 310 | { |
| 311 | struct atmel_aes_dev *dd = data; |
| 312 | |
| 313 | /* dma_lch_out - completed */ |
| 314 | tasklet_schedule(&dd->done_task); |
| 315 | } |
| 316 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 317 | static int atmel_aes_crypt_dma(struct atmel_aes_dev *dd, |
| 318 | dma_addr_t dma_addr_in, dma_addr_t dma_addr_out, int length) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 319 | { |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 320 | struct scatterlist sg[2]; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 321 | struct dma_async_tx_descriptor *in_desc, *out_desc; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 322 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 323 | dd->dma_size = length; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 324 | |
Leilei Zhao | 289b262 | 2015-04-07 17:45:10 +0800 | [diff] [blame] | 325 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, |
| 326 | DMA_TO_DEVICE); |
| 327 | dma_sync_single_for_device(dd->dev, dma_addr_out, length, |
| 328 | DMA_FROM_DEVICE); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 329 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 330 | if (dd->flags & AES_FLAGS_CFB8) { |
| 331 | dd->dma_lch_in.dma_conf.dst_addr_width = |
| 332 | DMA_SLAVE_BUSWIDTH_1_BYTE; |
| 333 | dd->dma_lch_out.dma_conf.src_addr_width = |
| 334 | DMA_SLAVE_BUSWIDTH_1_BYTE; |
| 335 | } else if (dd->flags & AES_FLAGS_CFB16) { |
| 336 | dd->dma_lch_in.dma_conf.dst_addr_width = |
| 337 | DMA_SLAVE_BUSWIDTH_2_BYTES; |
| 338 | dd->dma_lch_out.dma_conf.src_addr_width = |
| 339 | DMA_SLAVE_BUSWIDTH_2_BYTES; |
| 340 | } else { |
| 341 | dd->dma_lch_in.dma_conf.dst_addr_width = |
| 342 | DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 343 | dd->dma_lch_out.dma_conf.src_addr_width = |
| 344 | DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 345 | } |
| 346 | |
| 347 | if (dd->flags & (AES_FLAGS_CFB8 | AES_FLAGS_CFB16 | |
| 348 | AES_FLAGS_CFB32 | AES_FLAGS_CFB64)) { |
| 349 | dd->dma_lch_in.dma_conf.src_maxburst = 1; |
| 350 | dd->dma_lch_in.dma_conf.dst_maxburst = 1; |
| 351 | dd->dma_lch_out.dma_conf.src_maxburst = 1; |
| 352 | dd->dma_lch_out.dma_conf.dst_maxburst = 1; |
| 353 | } else { |
| 354 | dd->dma_lch_in.dma_conf.src_maxburst = dd->caps.max_burst_size; |
| 355 | dd->dma_lch_in.dma_conf.dst_maxburst = dd->caps.max_burst_size; |
| 356 | dd->dma_lch_out.dma_conf.src_maxburst = dd->caps.max_burst_size; |
| 357 | dd->dma_lch_out.dma_conf.dst_maxburst = dd->caps.max_burst_size; |
| 358 | } |
| 359 | |
| 360 | dmaengine_slave_config(dd->dma_lch_in.chan, &dd->dma_lch_in.dma_conf); |
| 361 | dmaengine_slave_config(dd->dma_lch_out.chan, &dd->dma_lch_out.dma_conf); |
| 362 | |
| 363 | dd->flags |= AES_FLAGS_DMA; |
| 364 | |
| 365 | sg_init_table(&sg[0], 1); |
| 366 | sg_dma_address(&sg[0]) = dma_addr_in; |
| 367 | sg_dma_len(&sg[0]) = length; |
| 368 | |
| 369 | sg_init_table(&sg[1], 1); |
| 370 | sg_dma_address(&sg[1]) = dma_addr_out; |
| 371 | sg_dma_len(&sg[1]) = length; |
| 372 | |
| 373 | in_desc = dmaengine_prep_slave_sg(dd->dma_lch_in.chan, &sg[0], |
| 374 | 1, DMA_MEM_TO_DEV, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 375 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 376 | if (!in_desc) |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 377 | return -EINVAL; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 378 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 379 | out_desc = dmaengine_prep_slave_sg(dd->dma_lch_out.chan, &sg[1], |
| 380 | 1, DMA_DEV_TO_MEM, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 381 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 382 | if (!out_desc) |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 383 | return -EINVAL; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 384 | |
| 385 | out_desc->callback = atmel_aes_dma_callback; |
| 386 | out_desc->callback_param = dd; |
| 387 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 388 | dmaengine_submit(out_desc); |
| 389 | dma_async_issue_pending(dd->dma_lch_out.chan); |
| 390 | |
| 391 | dmaengine_submit(in_desc); |
| 392 | dma_async_issue_pending(dd->dma_lch_in.chan); |
| 393 | |
| 394 | return 0; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 395 | } |
| 396 | |
| 397 | static int atmel_aes_crypt_cpu_start(struct atmel_aes_dev *dd) |
| 398 | { |
| 399 | dd->flags &= ~AES_FLAGS_DMA; |
| 400 | |
Leilei Zhao | 289b262 | 2015-04-07 17:45:10 +0800 | [diff] [blame] | 401 | dma_sync_single_for_cpu(dd->dev, dd->dma_addr_in, |
| 402 | dd->dma_size, DMA_TO_DEVICE); |
| 403 | dma_sync_single_for_cpu(dd->dev, dd->dma_addr_out, |
| 404 | dd->dma_size, DMA_FROM_DEVICE); |
| 405 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 406 | /* use cache buffers */ |
| 407 | dd->nb_in_sg = atmel_aes_sg_length(dd->req, dd->in_sg); |
| 408 | if (!dd->nb_in_sg) |
| 409 | return -EINVAL; |
| 410 | |
| 411 | dd->nb_out_sg = atmel_aes_sg_length(dd->req, dd->out_sg); |
Julia Lawall | 7b5c253c | 2013-01-21 14:02:51 +0100 | [diff] [blame] | 412 | if (!dd->nb_out_sg) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 413 | return -EINVAL; |
| 414 | |
| 415 | dd->bufcnt = sg_copy_to_buffer(dd->in_sg, dd->nb_in_sg, |
| 416 | dd->buf_in, dd->total); |
| 417 | |
| 418 | if (!dd->bufcnt) |
| 419 | return -EINVAL; |
| 420 | |
| 421 | dd->total -= dd->bufcnt; |
| 422 | |
| 423 | atmel_aes_write(dd, AES_IER, AES_INT_DATARDY); |
| 424 | atmel_aes_write_n(dd, AES_IDATAR(0), (u32 *) dd->buf_in, |
| 425 | dd->bufcnt >> 2); |
| 426 | |
| 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | static int atmel_aes_crypt_dma_start(struct atmel_aes_dev *dd) |
| 431 | { |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 432 | int err, fast = 0, in, out; |
| 433 | size_t count; |
| 434 | dma_addr_t addr_in, addr_out; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 435 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 436 | if ((!dd->in_offset) && (!dd->out_offset)) { |
| 437 | /* check for alignment */ |
| 438 | in = IS_ALIGNED((u32)dd->in_sg->offset, sizeof(u32)) && |
| 439 | IS_ALIGNED(dd->in_sg->length, dd->ctx->block_size); |
| 440 | out = IS_ALIGNED((u32)dd->out_sg->offset, sizeof(u32)) && |
| 441 | IS_ALIGNED(dd->out_sg->length, dd->ctx->block_size); |
| 442 | fast = in && out; |
| 443 | |
| 444 | if (sg_dma_len(dd->in_sg) != sg_dma_len(dd->out_sg)) |
| 445 | fast = 0; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 446 | } |
| 447 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 448 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 449 | if (fast) { |
Arnd Bergmann | 20ecae7 | 2015-11-17 10:22:06 +0100 | [diff] [blame] | 450 | count = min_t(size_t, dd->total, sg_dma_len(dd->in_sg)); |
| 451 | count = min_t(size_t, count, sg_dma_len(dd->out_sg)); |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 452 | |
| 453 | err = dma_map_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
| 454 | if (!err) { |
| 455 | dev_err(dd->dev, "dma_map_sg() error\n"); |
| 456 | return -EINVAL; |
| 457 | } |
| 458 | |
| 459 | err = dma_map_sg(dd->dev, dd->out_sg, 1, |
| 460 | DMA_FROM_DEVICE); |
| 461 | if (!err) { |
| 462 | dev_err(dd->dev, "dma_map_sg() error\n"); |
| 463 | dma_unmap_sg(dd->dev, dd->in_sg, 1, |
| 464 | DMA_TO_DEVICE); |
| 465 | return -EINVAL; |
| 466 | } |
| 467 | |
| 468 | addr_in = sg_dma_address(dd->in_sg); |
| 469 | addr_out = sg_dma_address(dd->out_sg); |
| 470 | |
| 471 | dd->flags |= AES_FLAGS_FAST; |
| 472 | |
| 473 | } else { |
Leilei Zhao | 289b262 | 2015-04-07 17:45:10 +0800 | [diff] [blame] | 474 | dma_sync_single_for_cpu(dd->dev, dd->dma_addr_in, |
| 475 | dd->dma_size, DMA_TO_DEVICE); |
| 476 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 477 | /* use cache buffers */ |
| 478 | count = atmel_aes_sg_copy(&dd->in_sg, &dd->in_offset, |
| 479 | dd->buf_in, dd->buflen, dd->total, 0); |
| 480 | |
| 481 | addr_in = dd->dma_addr_in; |
| 482 | addr_out = dd->dma_addr_out; |
| 483 | |
| 484 | dd->flags &= ~AES_FLAGS_FAST; |
| 485 | } |
| 486 | |
| 487 | dd->total -= count; |
| 488 | |
| 489 | err = atmel_aes_crypt_dma(dd, addr_in, addr_out, count); |
| 490 | |
| 491 | if (err && (dd->flags & AES_FLAGS_FAST)) { |
| 492 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
| 493 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_TO_DEVICE); |
| 494 | } |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 495 | |
| 496 | return err; |
| 497 | } |
| 498 | |
Cyrille Pitchen | cdfab4a | 2015-12-17 17:48:38 +0100 | [diff] [blame^] | 499 | static void atmel_aes_write_ctrl(struct atmel_aes_dev *dd, bool use_dma, |
| 500 | const u32 *iv) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 501 | { |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 502 | u32 valcr = 0, valmr = 0; |
| 503 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 504 | /* MR register must be set before IV registers */ |
| 505 | if (dd->ctx->keylen == AES_KEYSIZE_128) |
| 506 | valmr |= AES_MR_KEYSIZE_128; |
| 507 | else if (dd->ctx->keylen == AES_KEYSIZE_192) |
| 508 | valmr |= AES_MR_KEYSIZE_192; |
| 509 | else |
| 510 | valmr |= AES_MR_KEYSIZE_256; |
| 511 | |
| 512 | if (dd->flags & AES_FLAGS_CBC) { |
| 513 | valmr |= AES_MR_OPMOD_CBC; |
| 514 | } else if (dd->flags & AES_FLAGS_CFB) { |
| 515 | valmr |= AES_MR_OPMOD_CFB; |
| 516 | if (dd->flags & AES_FLAGS_CFB8) |
| 517 | valmr |= AES_MR_CFBS_8b; |
| 518 | else if (dd->flags & AES_FLAGS_CFB16) |
| 519 | valmr |= AES_MR_CFBS_16b; |
| 520 | else if (dd->flags & AES_FLAGS_CFB32) |
| 521 | valmr |= AES_MR_CFBS_32b; |
| 522 | else if (dd->flags & AES_FLAGS_CFB64) |
| 523 | valmr |= AES_MR_CFBS_64b; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 524 | else if (dd->flags & AES_FLAGS_CFB128) |
| 525 | valmr |= AES_MR_CFBS_128b; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 526 | } else if (dd->flags & AES_FLAGS_OFB) { |
| 527 | valmr |= AES_MR_OPMOD_OFB; |
| 528 | } else if (dd->flags & AES_FLAGS_CTR) { |
| 529 | valmr |= AES_MR_OPMOD_CTR; |
| 530 | } else { |
| 531 | valmr |= AES_MR_OPMOD_ECB; |
| 532 | } |
| 533 | |
| 534 | if (dd->flags & AES_FLAGS_ENCRYPT) |
| 535 | valmr |= AES_MR_CYPHER_ENC; |
| 536 | |
Cyrille Pitchen | cdfab4a | 2015-12-17 17:48:38 +0100 | [diff] [blame^] | 537 | if (use_dma) { |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 538 | valmr |= AES_MR_SMOD_IDATAR0; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 539 | if (dd->caps.has_dualbuff) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 540 | valmr |= AES_MR_DUALBUFF; |
| 541 | } else { |
| 542 | valmr |= AES_MR_SMOD_AUTO; |
| 543 | } |
| 544 | |
| 545 | atmel_aes_write(dd, AES_CR, valcr); |
| 546 | atmel_aes_write(dd, AES_MR, valmr); |
| 547 | |
| 548 | atmel_aes_write_n(dd, AES_KEYWR(0), dd->ctx->key, |
| 549 | dd->ctx->keylen >> 2); |
| 550 | |
| 551 | if (((dd->flags & AES_FLAGS_CBC) || (dd->flags & AES_FLAGS_CFB) || |
| 552 | (dd->flags & AES_FLAGS_OFB) || (dd->flags & AES_FLAGS_CTR)) && |
Cyrille Pitchen | cdfab4a | 2015-12-17 17:48:38 +0100 | [diff] [blame^] | 553 | iv) { |
| 554 | atmel_aes_write_n(dd, AES_IVR(0), iv, 4); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 555 | } |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | static int atmel_aes_handle_queue(struct atmel_aes_dev *dd, |
| 559 | struct ablkcipher_request *req) |
| 560 | { |
| 561 | struct crypto_async_request *async_req, *backlog; |
| 562 | struct atmel_aes_ctx *ctx; |
| 563 | struct atmel_aes_reqctx *rctx; |
| 564 | unsigned long flags; |
| 565 | int err, ret = 0; |
Cyrille Pitchen | cdfab4a | 2015-12-17 17:48:38 +0100 | [diff] [blame^] | 566 | bool use_dma; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 567 | |
| 568 | spin_lock_irqsave(&dd->lock, flags); |
| 569 | if (req) |
| 570 | ret = ablkcipher_enqueue_request(&dd->queue, req); |
| 571 | if (dd->flags & AES_FLAGS_BUSY) { |
| 572 | spin_unlock_irqrestore(&dd->lock, flags); |
| 573 | return ret; |
| 574 | } |
| 575 | backlog = crypto_get_backlog(&dd->queue); |
| 576 | async_req = crypto_dequeue_request(&dd->queue); |
| 577 | if (async_req) |
| 578 | dd->flags |= AES_FLAGS_BUSY; |
| 579 | spin_unlock_irqrestore(&dd->lock, flags); |
| 580 | |
| 581 | if (!async_req) |
| 582 | return ret; |
| 583 | |
| 584 | if (backlog) |
| 585 | backlog->complete(backlog, -EINPROGRESS); |
| 586 | |
| 587 | req = ablkcipher_request_cast(async_req); |
| 588 | |
| 589 | /* assign new request to device */ |
| 590 | dd->req = req; |
| 591 | dd->total = req->nbytes; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 592 | dd->in_offset = 0; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 593 | dd->in_sg = req->src; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 594 | dd->out_offset = 0; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 595 | dd->out_sg = req->dst; |
| 596 | |
| 597 | rctx = ablkcipher_request_ctx(req); |
| 598 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); |
| 599 | rctx->mode &= AES_FLAGS_MODE_MASK; |
| 600 | dd->flags = (dd->flags & ~AES_FLAGS_MODE_MASK) | rctx->mode; |
| 601 | dd->ctx = ctx; |
| 602 | ctx->dd = dd; |
| 603 | |
Cyrille Pitchen | cdfab4a | 2015-12-17 17:48:38 +0100 | [diff] [blame^] | 604 | err = atmel_aes_hw_init(dd); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 605 | if (!err) { |
Cyrille Pitchen | cdfab4a | 2015-12-17 17:48:38 +0100 | [diff] [blame^] | 606 | use_dma = (dd->total > ATMEL_AES_DMA_THRESHOLD); |
| 607 | atmel_aes_write_ctrl(dd, use_dma, req->info); |
| 608 | if (use_dma) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 609 | err = atmel_aes_crypt_dma_start(dd); |
| 610 | else |
| 611 | err = atmel_aes_crypt_cpu_start(dd); |
| 612 | } |
| 613 | if (err) { |
| 614 | /* aes_task will not finish it, so do it here */ |
| 615 | atmel_aes_finish_req(dd, err); |
| 616 | tasklet_schedule(&dd->queue_task); |
| 617 | } |
| 618 | |
| 619 | return ret; |
| 620 | } |
| 621 | |
| 622 | static int atmel_aes_crypt_dma_stop(struct atmel_aes_dev *dd) |
| 623 | { |
| 624 | int err = -EINVAL; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 625 | size_t count; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 626 | |
| 627 | if (dd->flags & AES_FLAGS_DMA) { |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 628 | err = 0; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 629 | if (dd->flags & AES_FLAGS_FAST) { |
| 630 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); |
| 631 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
| 632 | } else { |
Leilei Zhao | 9cd2232 | 2015-04-07 17:45:11 +0800 | [diff] [blame] | 633 | dma_sync_single_for_cpu(dd->dev, dd->dma_addr_out, |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 634 | dd->dma_size, DMA_FROM_DEVICE); |
| 635 | |
| 636 | /* copy data */ |
| 637 | count = atmel_aes_sg_copy(&dd->out_sg, &dd->out_offset, |
| 638 | dd->buf_out, dd->buflen, dd->dma_size, 1); |
| 639 | if (count != dd->dma_size) { |
| 640 | err = -EINVAL; |
Arnd Bergmann | 20ecae7 | 2015-11-17 10:22:06 +0100 | [diff] [blame] | 641 | pr_err("not all data converted: %zu\n", count); |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 642 | } |
| 643 | } |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 644 | } |
| 645 | |
| 646 | return err; |
| 647 | } |
| 648 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 649 | |
| 650 | static int atmel_aes_buff_init(struct atmel_aes_dev *dd) |
| 651 | { |
| 652 | int err = -ENOMEM; |
| 653 | |
| 654 | dd->buf_in = (void *)__get_free_pages(GFP_KERNEL, 0); |
| 655 | dd->buf_out = (void *)__get_free_pages(GFP_KERNEL, 0); |
| 656 | dd->buflen = PAGE_SIZE; |
| 657 | dd->buflen &= ~(AES_BLOCK_SIZE - 1); |
| 658 | |
| 659 | if (!dd->buf_in || !dd->buf_out) { |
| 660 | dev_err(dd->dev, "unable to alloc pages.\n"); |
| 661 | goto err_alloc; |
| 662 | } |
| 663 | |
| 664 | /* MAP here */ |
| 665 | dd->dma_addr_in = dma_map_single(dd->dev, dd->buf_in, |
| 666 | dd->buflen, DMA_TO_DEVICE); |
| 667 | if (dma_mapping_error(dd->dev, dd->dma_addr_in)) { |
Arnd Bergmann | 20ecae7 | 2015-11-17 10:22:06 +0100 | [diff] [blame] | 668 | dev_err(dd->dev, "dma %zd bytes error\n", dd->buflen); |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 669 | err = -EINVAL; |
| 670 | goto err_map_in; |
| 671 | } |
| 672 | |
| 673 | dd->dma_addr_out = dma_map_single(dd->dev, dd->buf_out, |
| 674 | dd->buflen, DMA_FROM_DEVICE); |
| 675 | if (dma_mapping_error(dd->dev, dd->dma_addr_out)) { |
Arnd Bergmann | 20ecae7 | 2015-11-17 10:22:06 +0100 | [diff] [blame] | 676 | dev_err(dd->dev, "dma %zd bytes error\n", dd->buflen); |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 677 | err = -EINVAL; |
| 678 | goto err_map_out; |
| 679 | } |
| 680 | |
| 681 | return 0; |
| 682 | |
| 683 | err_map_out: |
| 684 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, |
| 685 | DMA_TO_DEVICE); |
| 686 | err_map_in: |
Christophe Jaillet | 088f628 | 2015-01-20 08:15:52 +0100 | [diff] [blame] | 687 | err_alloc: |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 688 | free_page((unsigned long)dd->buf_out); |
| 689 | free_page((unsigned long)dd->buf_in); |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 690 | if (err) |
| 691 | pr_err("error: %d\n", err); |
| 692 | return err; |
| 693 | } |
| 694 | |
| 695 | static void atmel_aes_buff_cleanup(struct atmel_aes_dev *dd) |
| 696 | { |
| 697 | dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen, |
| 698 | DMA_FROM_DEVICE); |
| 699 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, |
| 700 | DMA_TO_DEVICE); |
| 701 | free_page((unsigned long)dd->buf_out); |
| 702 | free_page((unsigned long)dd->buf_in); |
| 703 | } |
| 704 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 705 | static int atmel_aes_crypt(struct ablkcipher_request *req, unsigned long mode) |
| 706 | { |
| 707 | struct atmel_aes_ctx *ctx = crypto_ablkcipher_ctx( |
| 708 | crypto_ablkcipher_reqtfm(req)); |
| 709 | struct atmel_aes_reqctx *rctx = ablkcipher_request_ctx(req); |
| 710 | struct atmel_aes_dev *dd; |
| 711 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 712 | if (mode & AES_FLAGS_CFB8) { |
| 713 | if (!IS_ALIGNED(req->nbytes, CFB8_BLOCK_SIZE)) { |
| 714 | pr_err("request size is not exact amount of CFB8 blocks\n"); |
| 715 | return -EINVAL; |
| 716 | } |
| 717 | ctx->block_size = CFB8_BLOCK_SIZE; |
| 718 | } else if (mode & AES_FLAGS_CFB16) { |
| 719 | if (!IS_ALIGNED(req->nbytes, CFB16_BLOCK_SIZE)) { |
| 720 | pr_err("request size is not exact amount of CFB16 blocks\n"); |
| 721 | return -EINVAL; |
| 722 | } |
| 723 | ctx->block_size = CFB16_BLOCK_SIZE; |
| 724 | } else if (mode & AES_FLAGS_CFB32) { |
| 725 | if (!IS_ALIGNED(req->nbytes, CFB32_BLOCK_SIZE)) { |
| 726 | pr_err("request size is not exact amount of CFB32 blocks\n"); |
| 727 | return -EINVAL; |
| 728 | } |
| 729 | ctx->block_size = CFB32_BLOCK_SIZE; |
Leilei Zhao | 9f84951 | 2014-04-22 15:23:24 +0800 | [diff] [blame] | 730 | } else if (mode & AES_FLAGS_CFB64) { |
| 731 | if (!IS_ALIGNED(req->nbytes, CFB64_BLOCK_SIZE)) { |
| 732 | pr_err("request size is not exact amount of CFB64 blocks\n"); |
| 733 | return -EINVAL; |
| 734 | } |
| 735 | ctx->block_size = CFB64_BLOCK_SIZE; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 736 | } else { |
| 737 | if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) { |
| 738 | pr_err("request size is not exact amount of AES blocks\n"); |
| 739 | return -EINVAL; |
| 740 | } |
| 741 | ctx->block_size = AES_BLOCK_SIZE; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 742 | } |
| 743 | |
| 744 | dd = atmel_aes_find_dev(ctx); |
| 745 | if (!dd) |
| 746 | return -ENODEV; |
| 747 | |
| 748 | rctx->mode = mode; |
| 749 | |
| 750 | return atmel_aes_handle_queue(dd, req); |
| 751 | } |
| 752 | |
| 753 | static bool atmel_aes_filter(struct dma_chan *chan, void *slave) |
| 754 | { |
| 755 | struct at_dma_slave *sl = slave; |
| 756 | |
| 757 | if (sl && sl->dma_dev == chan->device->dev) { |
| 758 | chan->private = sl; |
| 759 | return true; |
| 760 | } else { |
| 761 | return false; |
| 762 | } |
| 763 | } |
| 764 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 765 | static int atmel_aes_dma_init(struct atmel_aes_dev *dd, |
| 766 | struct crypto_platform_data *pdata) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 767 | { |
| 768 | int err = -ENOMEM; |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 769 | dma_cap_mask_t mask; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 770 | |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 771 | dma_cap_zero(mask); |
| 772 | dma_cap_set(DMA_SLAVE, mask); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 773 | |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 774 | /* Try to grab 2 DMA channels */ |
| 775 | dd->dma_lch_in.chan = dma_request_slave_channel_compat(mask, |
| 776 | atmel_aes_filter, &pdata->dma_slave->rxdata, dd->dev, "tx"); |
| 777 | if (!dd->dma_lch_in.chan) |
| 778 | goto err_dma_in; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 779 | |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 780 | dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV; |
| 781 | dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base + |
| 782 | AES_IDATAR(0); |
| 783 | dd->dma_lch_in.dma_conf.src_maxburst = dd->caps.max_burst_size; |
| 784 | dd->dma_lch_in.dma_conf.src_addr_width = |
| 785 | DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 786 | dd->dma_lch_in.dma_conf.dst_maxburst = dd->caps.max_burst_size; |
| 787 | dd->dma_lch_in.dma_conf.dst_addr_width = |
| 788 | DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 789 | dd->dma_lch_in.dma_conf.device_fc = false; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 790 | |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 791 | dd->dma_lch_out.chan = dma_request_slave_channel_compat(mask, |
| 792 | atmel_aes_filter, &pdata->dma_slave->txdata, dd->dev, "rx"); |
| 793 | if (!dd->dma_lch_out.chan) |
| 794 | goto err_dma_out; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 795 | |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 796 | dd->dma_lch_out.dma_conf.direction = DMA_DEV_TO_MEM; |
| 797 | dd->dma_lch_out.dma_conf.src_addr = dd->phys_base + |
| 798 | AES_ODATAR(0); |
| 799 | dd->dma_lch_out.dma_conf.src_maxburst = dd->caps.max_burst_size; |
| 800 | dd->dma_lch_out.dma_conf.src_addr_width = |
| 801 | DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 802 | dd->dma_lch_out.dma_conf.dst_maxburst = dd->caps.max_burst_size; |
| 803 | dd->dma_lch_out.dma_conf.dst_addr_width = |
| 804 | DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 805 | dd->dma_lch_out.dma_conf.device_fc = false; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 806 | |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 807 | return 0; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 808 | |
| 809 | err_dma_out: |
| 810 | dma_release_channel(dd->dma_lch_in.chan); |
| 811 | err_dma_in: |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 812 | dev_warn(dd->dev, "no DMA channel available\n"); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 813 | return err; |
| 814 | } |
| 815 | |
| 816 | static void atmel_aes_dma_cleanup(struct atmel_aes_dev *dd) |
| 817 | { |
| 818 | dma_release_channel(dd->dma_lch_in.chan); |
| 819 | dma_release_channel(dd->dma_lch_out.chan); |
| 820 | } |
| 821 | |
| 822 | static int atmel_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, |
| 823 | unsigned int keylen) |
| 824 | { |
| 825 | struct atmel_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 826 | |
| 827 | if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 && |
| 828 | keylen != AES_KEYSIZE_256) { |
| 829 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| 830 | return -EINVAL; |
| 831 | } |
| 832 | |
| 833 | memcpy(ctx->key, key, keylen); |
| 834 | ctx->keylen = keylen; |
| 835 | |
| 836 | return 0; |
| 837 | } |
| 838 | |
| 839 | static int atmel_aes_ecb_encrypt(struct ablkcipher_request *req) |
| 840 | { |
| 841 | return atmel_aes_crypt(req, |
| 842 | AES_FLAGS_ENCRYPT); |
| 843 | } |
| 844 | |
| 845 | static int atmel_aes_ecb_decrypt(struct ablkcipher_request *req) |
| 846 | { |
| 847 | return atmel_aes_crypt(req, |
| 848 | 0); |
| 849 | } |
| 850 | |
| 851 | static int atmel_aes_cbc_encrypt(struct ablkcipher_request *req) |
| 852 | { |
| 853 | return atmel_aes_crypt(req, |
| 854 | AES_FLAGS_ENCRYPT | AES_FLAGS_CBC); |
| 855 | } |
| 856 | |
| 857 | static int atmel_aes_cbc_decrypt(struct ablkcipher_request *req) |
| 858 | { |
| 859 | return atmel_aes_crypt(req, |
| 860 | AES_FLAGS_CBC); |
| 861 | } |
| 862 | |
| 863 | static int atmel_aes_ofb_encrypt(struct ablkcipher_request *req) |
| 864 | { |
| 865 | return atmel_aes_crypt(req, |
| 866 | AES_FLAGS_ENCRYPT | AES_FLAGS_OFB); |
| 867 | } |
| 868 | |
| 869 | static int atmel_aes_ofb_decrypt(struct ablkcipher_request *req) |
| 870 | { |
| 871 | return atmel_aes_crypt(req, |
| 872 | AES_FLAGS_OFB); |
| 873 | } |
| 874 | |
| 875 | static int atmel_aes_cfb_encrypt(struct ablkcipher_request *req) |
| 876 | { |
| 877 | return atmel_aes_crypt(req, |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 878 | AES_FLAGS_ENCRYPT | AES_FLAGS_CFB | AES_FLAGS_CFB128); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 879 | } |
| 880 | |
| 881 | static int atmel_aes_cfb_decrypt(struct ablkcipher_request *req) |
| 882 | { |
| 883 | return atmel_aes_crypt(req, |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 884 | AES_FLAGS_CFB | AES_FLAGS_CFB128); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 885 | } |
| 886 | |
| 887 | static int atmel_aes_cfb64_encrypt(struct ablkcipher_request *req) |
| 888 | { |
| 889 | return atmel_aes_crypt(req, |
| 890 | AES_FLAGS_ENCRYPT | AES_FLAGS_CFB | AES_FLAGS_CFB64); |
| 891 | } |
| 892 | |
| 893 | static int atmel_aes_cfb64_decrypt(struct ablkcipher_request *req) |
| 894 | { |
| 895 | return atmel_aes_crypt(req, |
| 896 | AES_FLAGS_CFB | AES_FLAGS_CFB64); |
| 897 | } |
| 898 | |
| 899 | static int atmel_aes_cfb32_encrypt(struct ablkcipher_request *req) |
| 900 | { |
| 901 | return atmel_aes_crypt(req, |
| 902 | AES_FLAGS_ENCRYPT | AES_FLAGS_CFB | AES_FLAGS_CFB32); |
| 903 | } |
| 904 | |
| 905 | static int atmel_aes_cfb32_decrypt(struct ablkcipher_request *req) |
| 906 | { |
| 907 | return atmel_aes_crypt(req, |
| 908 | AES_FLAGS_CFB | AES_FLAGS_CFB32); |
| 909 | } |
| 910 | |
| 911 | static int atmel_aes_cfb16_encrypt(struct ablkcipher_request *req) |
| 912 | { |
| 913 | return atmel_aes_crypt(req, |
| 914 | AES_FLAGS_ENCRYPT | AES_FLAGS_CFB | AES_FLAGS_CFB16); |
| 915 | } |
| 916 | |
| 917 | static int atmel_aes_cfb16_decrypt(struct ablkcipher_request *req) |
| 918 | { |
| 919 | return atmel_aes_crypt(req, |
| 920 | AES_FLAGS_CFB | AES_FLAGS_CFB16); |
| 921 | } |
| 922 | |
| 923 | static int atmel_aes_cfb8_encrypt(struct ablkcipher_request *req) |
| 924 | { |
| 925 | return atmel_aes_crypt(req, |
| 926 | AES_FLAGS_ENCRYPT | AES_FLAGS_CFB | AES_FLAGS_CFB8); |
| 927 | } |
| 928 | |
| 929 | static int atmel_aes_cfb8_decrypt(struct ablkcipher_request *req) |
| 930 | { |
| 931 | return atmel_aes_crypt(req, |
| 932 | AES_FLAGS_CFB | AES_FLAGS_CFB8); |
| 933 | } |
| 934 | |
| 935 | static int atmel_aes_ctr_encrypt(struct ablkcipher_request *req) |
| 936 | { |
| 937 | return atmel_aes_crypt(req, |
| 938 | AES_FLAGS_ENCRYPT | AES_FLAGS_CTR); |
| 939 | } |
| 940 | |
| 941 | static int atmel_aes_ctr_decrypt(struct ablkcipher_request *req) |
| 942 | { |
| 943 | return atmel_aes_crypt(req, |
| 944 | AES_FLAGS_CTR); |
| 945 | } |
| 946 | |
| 947 | static int atmel_aes_cra_init(struct crypto_tfm *tfm) |
| 948 | { |
| 949 | tfm->crt_ablkcipher.reqsize = sizeof(struct atmel_aes_reqctx); |
| 950 | |
| 951 | return 0; |
| 952 | } |
| 953 | |
| 954 | static void atmel_aes_cra_exit(struct crypto_tfm *tfm) |
| 955 | { |
| 956 | } |
| 957 | |
| 958 | static struct crypto_alg aes_algs[] = { |
| 959 | { |
| 960 | .cra_name = "ecb(aes)", |
| 961 | .cra_driver_name = "atmel-ecb-aes", |
Cyrille Pitchen | 88efd9a | 2015-12-17 17:48:34 +0100 | [diff] [blame] | 962 | .cra_priority = ATMEL_AES_PRIORITY, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 963 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 964 | .cra_blocksize = AES_BLOCK_SIZE, |
| 965 | .cra_ctxsize = sizeof(struct atmel_aes_ctx), |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 966 | .cra_alignmask = 0xf, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 967 | .cra_type = &crypto_ablkcipher_type, |
| 968 | .cra_module = THIS_MODULE, |
| 969 | .cra_init = atmel_aes_cra_init, |
| 970 | .cra_exit = atmel_aes_cra_exit, |
| 971 | .cra_u.ablkcipher = { |
| 972 | .min_keysize = AES_MIN_KEY_SIZE, |
| 973 | .max_keysize = AES_MAX_KEY_SIZE, |
| 974 | .setkey = atmel_aes_setkey, |
| 975 | .encrypt = atmel_aes_ecb_encrypt, |
| 976 | .decrypt = atmel_aes_ecb_decrypt, |
| 977 | } |
| 978 | }, |
| 979 | { |
| 980 | .cra_name = "cbc(aes)", |
| 981 | .cra_driver_name = "atmel-cbc-aes", |
Cyrille Pitchen | 88efd9a | 2015-12-17 17:48:34 +0100 | [diff] [blame] | 982 | .cra_priority = ATMEL_AES_PRIORITY, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 983 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 984 | .cra_blocksize = AES_BLOCK_SIZE, |
| 985 | .cra_ctxsize = sizeof(struct atmel_aes_ctx), |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 986 | .cra_alignmask = 0xf, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 987 | .cra_type = &crypto_ablkcipher_type, |
| 988 | .cra_module = THIS_MODULE, |
| 989 | .cra_init = atmel_aes_cra_init, |
| 990 | .cra_exit = atmel_aes_cra_exit, |
| 991 | .cra_u.ablkcipher = { |
| 992 | .min_keysize = AES_MIN_KEY_SIZE, |
| 993 | .max_keysize = AES_MAX_KEY_SIZE, |
| 994 | .ivsize = AES_BLOCK_SIZE, |
| 995 | .setkey = atmel_aes_setkey, |
| 996 | .encrypt = atmel_aes_cbc_encrypt, |
| 997 | .decrypt = atmel_aes_cbc_decrypt, |
| 998 | } |
| 999 | }, |
| 1000 | { |
| 1001 | .cra_name = "ofb(aes)", |
| 1002 | .cra_driver_name = "atmel-ofb-aes", |
Cyrille Pitchen | 88efd9a | 2015-12-17 17:48:34 +0100 | [diff] [blame] | 1003 | .cra_priority = ATMEL_AES_PRIORITY, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1004 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 1005 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1006 | .cra_ctxsize = sizeof(struct atmel_aes_ctx), |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1007 | .cra_alignmask = 0xf, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1008 | .cra_type = &crypto_ablkcipher_type, |
| 1009 | .cra_module = THIS_MODULE, |
| 1010 | .cra_init = atmel_aes_cra_init, |
| 1011 | .cra_exit = atmel_aes_cra_exit, |
| 1012 | .cra_u.ablkcipher = { |
| 1013 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1014 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1015 | .ivsize = AES_BLOCK_SIZE, |
| 1016 | .setkey = atmel_aes_setkey, |
| 1017 | .encrypt = atmel_aes_ofb_encrypt, |
| 1018 | .decrypt = atmel_aes_ofb_decrypt, |
| 1019 | } |
| 1020 | }, |
| 1021 | { |
| 1022 | .cra_name = "cfb(aes)", |
| 1023 | .cra_driver_name = "atmel-cfb-aes", |
Cyrille Pitchen | 88efd9a | 2015-12-17 17:48:34 +0100 | [diff] [blame] | 1024 | .cra_priority = ATMEL_AES_PRIORITY, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1025 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 1026 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1027 | .cra_ctxsize = sizeof(struct atmel_aes_ctx), |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1028 | .cra_alignmask = 0xf, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1029 | .cra_type = &crypto_ablkcipher_type, |
| 1030 | .cra_module = THIS_MODULE, |
| 1031 | .cra_init = atmel_aes_cra_init, |
| 1032 | .cra_exit = atmel_aes_cra_exit, |
| 1033 | .cra_u.ablkcipher = { |
| 1034 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1035 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1036 | .ivsize = AES_BLOCK_SIZE, |
| 1037 | .setkey = atmel_aes_setkey, |
| 1038 | .encrypt = atmel_aes_cfb_encrypt, |
| 1039 | .decrypt = atmel_aes_cfb_decrypt, |
| 1040 | } |
| 1041 | }, |
| 1042 | { |
| 1043 | .cra_name = "cfb32(aes)", |
| 1044 | .cra_driver_name = "atmel-cfb32-aes", |
Cyrille Pitchen | 88efd9a | 2015-12-17 17:48:34 +0100 | [diff] [blame] | 1045 | .cra_priority = ATMEL_AES_PRIORITY, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1046 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 1047 | .cra_blocksize = CFB32_BLOCK_SIZE, |
| 1048 | .cra_ctxsize = sizeof(struct atmel_aes_ctx), |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1049 | .cra_alignmask = 0x3, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1050 | .cra_type = &crypto_ablkcipher_type, |
| 1051 | .cra_module = THIS_MODULE, |
| 1052 | .cra_init = atmel_aes_cra_init, |
| 1053 | .cra_exit = atmel_aes_cra_exit, |
| 1054 | .cra_u.ablkcipher = { |
| 1055 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1056 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1057 | .ivsize = AES_BLOCK_SIZE, |
| 1058 | .setkey = atmel_aes_setkey, |
| 1059 | .encrypt = atmel_aes_cfb32_encrypt, |
| 1060 | .decrypt = atmel_aes_cfb32_decrypt, |
| 1061 | } |
| 1062 | }, |
| 1063 | { |
| 1064 | .cra_name = "cfb16(aes)", |
| 1065 | .cra_driver_name = "atmel-cfb16-aes", |
Cyrille Pitchen | 88efd9a | 2015-12-17 17:48:34 +0100 | [diff] [blame] | 1066 | .cra_priority = ATMEL_AES_PRIORITY, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1067 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 1068 | .cra_blocksize = CFB16_BLOCK_SIZE, |
| 1069 | .cra_ctxsize = sizeof(struct atmel_aes_ctx), |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1070 | .cra_alignmask = 0x1, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1071 | .cra_type = &crypto_ablkcipher_type, |
| 1072 | .cra_module = THIS_MODULE, |
| 1073 | .cra_init = atmel_aes_cra_init, |
| 1074 | .cra_exit = atmel_aes_cra_exit, |
| 1075 | .cra_u.ablkcipher = { |
| 1076 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1077 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1078 | .ivsize = AES_BLOCK_SIZE, |
| 1079 | .setkey = atmel_aes_setkey, |
| 1080 | .encrypt = atmel_aes_cfb16_encrypt, |
| 1081 | .decrypt = atmel_aes_cfb16_decrypt, |
| 1082 | } |
| 1083 | }, |
| 1084 | { |
| 1085 | .cra_name = "cfb8(aes)", |
| 1086 | .cra_driver_name = "atmel-cfb8-aes", |
Cyrille Pitchen | 88efd9a | 2015-12-17 17:48:34 +0100 | [diff] [blame] | 1087 | .cra_priority = ATMEL_AES_PRIORITY, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1088 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
Leilei Zhao | e5d8c96 | 2014-04-22 15:23:23 +0800 | [diff] [blame] | 1089 | .cra_blocksize = CFB8_BLOCK_SIZE, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1090 | .cra_ctxsize = sizeof(struct atmel_aes_ctx), |
| 1091 | .cra_alignmask = 0x0, |
| 1092 | .cra_type = &crypto_ablkcipher_type, |
| 1093 | .cra_module = THIS_MODULE, |
| 1094 | .cra_init = atmel_aes_cra_init, |
| 1095 | .cra_exit = atmel_aes_cra_exit, |
| 1096 | .cra_u.ablkcipher = { |
| 1097 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1098 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1099 | .ivsize = AES_BLOCK_SIZE, |
| 1100 | .setkey = atmel_aes_setkey, |
| 1101 | .encrypt = atmel_aes_cfb8_encrypt, |
| 1102 | .decrypt = atmel_aes_cfb8_decrypt, |
| 1103 | } |
| 1104 | }, |
| 1105 | { |
| 1106 | .cra_name = "ctr(aes)", |
| 1107 | .cra_driver_name = "atmel-ctr-aes", |
Cyrille Pitchen | 88efd9a | 2015-12-17 17:48:34 +0100 | [diff] [blame] | 1108 | .cra_priority = ATMEL_AES_PRIORITY, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1109 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 1110 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1111 | .cra_ctxsize = sizeof(struct atmel_aes_ctx), |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1112 | .cra_alignmask = 0xf, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1113 | .cra_type = &crypto_ablkcipher_type, |
| 1114 | .cra_module = THIS_MODULE, |
| 1115 | .cra_init = atmel_aes_cra_init, |
| 1116 | .cra_exit = atmel_aes_cra_exit, |
| 1117 | .cra_u.ablkcipher = { |
| 1118 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1119 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1120 | .ivsize = AES_BLOCK_SIZE, |
| 1121 | .setkey = atmel_aes_setkey, |
| 1122 | .encrypt = atmel_aes_ctr_encrypt, |
| 1123 | .decrypt = atmel_aes_ctr_decrypt, |
| 1124 | } |
| 1125 | }, |
| 1126 | }; |
| 1127 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1128 | static struct crypto_alg aes_cfb64_alg = { |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1129 | .cra_name = "cfb64(aes)", |
| 1130 | .cra_driver_name = "atmel-cfb64-aes", |
Cyrille Pitchen | 88efd9a | 2015-12-17 17:48:34 +0100 | [diff] [blame] | 1131 | .cra_priority = ATMEL_AES_PRIORITY, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1132 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 1133 | .cra_blocksize = CFB64_BLOCK_SIZE, |
| 1134 | .cra_ctxsize = sizeof(struct atmel_aes_ctx), |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1135 | .cra_alignmask = 0x7, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1136 | .cra_type = &crypto_ablkcipher_type, |
| 1137 | .cra_module = THIS_MODULE, |
| 1138 | .cra_init = atmel_aes_cra_init, |
| 1139 | .cra_exit = atmel_aes_cra_exit, |
| 1140 | .cra_u.ablkcipher = { |
| 1141 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1142 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1143 | .ivsize = AES_BLOCK_SIZE, |
| 1144 | .setkey = atmel_aes_setkey, |
| 1145 | .encrypt = atmel_aes_cfb64_encrypt, |
| 1146 | .decrypt = atmel_aes_cfb64_decrypt, |
| 1147 | } |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1148 | }; |
| 1149 | |
| 1150 | static void atmel_aes_queue_task(unsigned long data) |
| 1151 | { |
| 1152 | struct atmel_aes_dev *dd = (struct atmel_aes_dev *)data; |
| 1153 | |
| 1154 | atmel_aes_handle_queue(dd, NULL); |
| 1155 | } |
| 1156 | |
| 1157 | static void atmel_aes_done_task(unsigned long data) |
| 1158 | { |
| 1159 | struct atmel_aes_dev *dd = (struct atmel_aes_dev *) data; |
| 1160 | int err; |
| 1161 | |
| 1162 | if (!(dd->flags & AES_FLAGS_DMA)) { |
| 1163 | atmel_aes_read_n(dd, AES_ODATAR(0), (u32 *) dd->buf_out, |
| 1164 | dd->bufcnt >> 2); |
| 1165 | |
| 1166 | if (sg_copy_from_buffer(dd->out_sg, dd->nb_out_sg, |
| 1167 | dd->buf_out, dd->bufcnt)) |
| 1168 | err = 0; |
| 1169 | else |
| 1170 | err = -EINVAL; |
| 1171 | |
| 1172 | goto cpu_end; |
| 1173 | } |
| 1174 | |
| 1175 | err = atmel_aes_crypt_dma_stop(dd); |
| 1176 | |
| 1177 | err = dd->err ? : err; |
| 1178 | |
| 1179 | if (dd->total && !err) { |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1180 | if (dd->flags & AES_FLAGS_FAST) { |
| 1181 | dd->in_sg = sg_next(dd->in_sg); |
| 1182 | dd->out_sg = sg_next(dd->out_sg); |
| 1183 | if (!dd->in_sg || !dd->out_sg) |
| 1184 | err = -EINVAL; |
| 1185 | } |
| 1186 | if (!err) |
| 1187 | err = atmel_aes_crypt_dma_start(dd); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1188 | if (!err) |
| 1189 | return; /* DMA started. Not fininishing. */ |
| 1190 | } |
| 1191 | |
| 1192 | cpu_end: |
| 1193 | atmel_aes_finish_req(dd, err); |
| 1194 | atmel_aes_handle_queue(dd, NULL); |
| 1195 | } |
| 1196 | |
| 1197 | static irqreturn_t atmel_aes_irq(int irq, void *dev_id) |
| 1198 | { |
| 1199 | struct atmel_aes_dev *aes_dd = dev_id; |
| 1200 | u32 reg; |
| 1201 | |
| 1202 | reg = atmel_aes_read(aes_dd, AES_ISR); |
| 1203 | if (reg & atmel_aes_read(aes_dd, AES_IMR)) { |
| 1204 | atmel_aes_write(aes_dd, AES_IDR, reg); |
| 1205 | if (AES_FLAGS_BUSY & aes_dd->flags) |
| 1206 | tasklet_schedule(&aes_dd->done_task); |
| 1207 | else |
| 1208 | dev_warn(aes_dd->dev, "AES interrupt when no active requests.\n"); |
| 1209 | return IRQ_HANDLED; |
| 1210 | } |
| 1211 | |
| 1212 | return IRQ_NONE; |
| 1213 | } |
| 1214 | |
| 1215 | static void atmel_aes_unregister_algs(struct atmel_aes_dev *dd) |
| 1216 | { |
| 1217 | int i; |
| 1218 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1219 | if (dd->caps.has_cfb64) |
| 1220 | crypto_unregister_alg(&aes_cfb64_alg); |
Cyrille Pitchen | 924a8bc | 2015-12-17 17:48:35 +0100 | [diff] [blame] | 1221 | |
| 1222 | for (i = 0; i < ARRAY_SIZE(aes_algs); i++) |
| 1223 | crypto_unregister_alg(&aes_algs[i]); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1224 | } |
| 1225 | |
| 1226 | static int atmel_aes_register_algs(struct atmel_aes_dev *dd) |
| 1227 | { |
| 1228 | int err, i, j; |
| 1229 | |
| 1230 | for (i = 0; i < ARRAY_SIZE(aes_algs); i++) { |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1231 | err = crypto_register_alg(&aes_algs[i]); |
| 1232 | if (err) |
| 1233 | goto err_aes_algs; |
| 1234 | } |
| 1235 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1236 | if (dd->caps.has_cfb64) { |
| 1237 | err = crypto_register_alg(&aes_cfb64_alg); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1238 | if (err) |
| 1239 | goto err_aes_cfb64_alg; |
| 1240 | } |
| 1241 | |
| 1242 | return 0; |
| 1243 | |
| 1244 | err_aes_cfb64_alg: |
| 1245 | i = ARRAY_SIZE(aes_algs); |
| 1246 | err_aes_algs: |
| 1247 | for (j = 0; j < i; j++) |
| 1248 | crypto_unregister_alg(&aes_algs[j]); |
| 1249 | |
| 1250 | return err; |
| 1251 | } |
| 1252 | |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1253 | static void atmel_aes_get_cap(struct atmel_aes_dev *dd) |
| 1254 | { |
| 1255 | dd->caps.has_dualbuff = 0; |
| 1256 | dd->caps.has_cfb64 = 0; |
| 1257 | dd->caps.max_burst_size = 1; |
| 1258 | |
| 1259 | /* keep only major version number */ |
| 1260 | switch (dd->hw_version & 0xff0) { |
Leilei Zhao | 973e209 | 2015-12-17 17:48:32 +0100 | [diff] [blame] | 1261 | case 0x500: |
| 1262 | dd->caps.has_dualbuff = 1; |
| 1263 | dd->caps.has_cfb64 = 1; |
| 1264 | dd->caps.max_burst_size = 4; |
| 1265 | break; |
Leilei Zhao | cf1f0d1 | 2015-04-07 17:45:02 +0800 | [diff] [blame] | 1266 | case 0x200: |
| 1267 | dd->caps.has_dualbuff = 1; |
| 1268 | dd->caps.has_cfb64 = 1; |
| 1269 | dd->caps.max_burst_size = 4; |
| 1270 | break; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1271 | case 0x130: |
| 1272 | dd->caps.has_dualbuff = 1; |
| 1273 | dd->caps.has_cfb64 = 1; |
| 1274 | dd->caps.max_burst_size = 4; |
| 1275 | break; |
| 1276 | case 0x120: |
| 1277 | break; |
| 1278 | default: |
| 1279 | dev_warn(dd->dev, |
| 1280 | "Unmanaged aes version, set minimum capabilities\n"); |
| 1281 | break; |
| 1282 | } |
| 1283 | } |
| 1284 | |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 1285 | #if defined(CONFIG_OF) |
| 1286 | static const struct of_device_id atmel_aes_dt_ids[] = { |
| 1287 | { .compatible = "atmel,at91sam9g46-aes" }, |
| 1288 | { /* sentinel */ } |
| 1289 | }; |
| 1290 | MODULE_DEVICE_TABLE(of, atmel_aes_dt_ids); |
| 1291 | |
| 1292 | static struct crypto_platform_data *atmel_aes_of_init(struct platform_device *pdev) |
| 1293 | { |
| 1294 | struct device_node *np = pdev->dev.of_node; |
| 1295 | struct crypto_platform_data *pdata; |
| 1296 | |
| 1297 | if (!np) { |
| 1298 | dev_err(&pdev->dev, "device node not found\n"); |
| 1299 | return ERR_PTR(-EINVAL); |
| 1300 | } |
| 1301 | |
| 1302 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); |
| 1303 | if (!pdata) { |
| 1304 | dev_err(&pdev->dev, "could not allocate memory for pdata\n"); |
| 1305 | return ERR_PTR(-ENOMEM); |
| 1306 | } |
| 1307 | |
| 1308 | pdata->dma_slave = devm_kzalloc(&pdev->dev, |
| 1309 | sizeof(*(pdata->dma_slave)), |
| 1310 | GFP_KERNEL); |
| 1311 | if (!pdata->dma_slave) { |
| 1312 | dev_err(&pdev->dev, "could not allocate memory for dma_slave\n"); |
| 1313 | devm_kfree(&pdev->dev, pdata); |
| 1314 | return ERR_PTR(-ENOMEM); |
| 1315 | } |
| 1316 | |
| 1317 | return pdata; |
| 1318 | } |
| 1319 | #else |
| 1320 | static inline struct crypto_platform_data *atmel_aes_of_init(struct platform_device *pdev) |
| 1321 | { |
| 1322 | return ERR_PTR(-EINVAL); |
| 1323 | } |
| 1324 | #endif |
| 1325 | |
Greg Kroah-Hartman | 49cfe4d | 2012-12-21 13:14:09 -0800 | [diff] [blame] | 1326 | static int atmel_aes_probe(struct platform_device *pdev) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1327 | { |
| 1328 | struct atmel_aes_dev *aes_dd; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1329 | struct crypto_platform_data *pdata; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1330 | struct device *dev = &pdev->dev; |
| 1331 | struct resource *aes_res; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1332 | int err; |
| 1333 | |
| 1334 | pdata = pdev->dev.platform_data; |
| 1335 | if (!pdata) { |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 1336 | pdata = atmel_aes_of_init(pdev); |
| 1337 | if (IS_ERR(pdata)) { |
| 1338 | err = PTR_ERR(pdata); |
| 1339 | goto aes_dd_err; |
| 1340 | } |
| 1341 | } |
| 1342 | |
| 1343 | if (!pdata->dma_slave) { |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1344 | err = -ENXIO; |
| 1345 | goto aes_dd_err; |
| 1346 | } |
| 1347 | |
LABBE Corentin | b0e8b34 | 2015-10-12 19:47:03 +0200 | [diff] [blame] | 1348 | aes_dd = devm_kzalloc(&pdev->dev, sizeof(*aes_dd), GFP_KERNEL); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1349 | if (aes_dd == NULL) { |
| 1350 | dev_err(dev, "unable to alloc data struct.\n"); |
| 1351 | err = -ENOMEM; |
| 1352 | goto aes_dd_err; |
| 1353 | } |
| 1354 | |
| 1355 | aes_dd->dev = dev; |
| 1356 | |
| 1357 | platform_set_drvdata(pdev, aes_dd); |
| 1358 | |
| 1359 | INIT_LIST_HEAD(&aes_dd->list); |
Leilei Zhao | 8a10eb8 | 2015-04-07 17:45:09 +0800 | [diff] [blame] | 1360 | spin_lock_init(&aes_dd->lock); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1361 | |
| 1362 | tasklet_init(&aes_dd->done_task, atmel_aes_done_task, |
| 1363 | (unsigned long)aes_dd); |
| 1364 | tasklet_init(&aes_dd->queue_task, atmel_aes_queue_task, |
| 1365 | (unsigned long)aes_dd); |
| 1366 | |
| 1367 | crypto_init_queue(&aes_dd->queue, ATMEL_AES_QUEUE_LENGTH); |
| 1368 | |
| 1369 | aes_dd->irq = -1; |
| 1370 | |
| 1371 | /* Get the base address */ |
| 1372 | aes_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1373 | if (!aes_res) { |
| 1374 | dev_err(dev, "no MEM resource info\n"); |
| 1375 | err = -ENODEV; |
| 1376 | goto res_err; |
| 1377 | } |
| 1378 | aes_dd->phys_base = aes_res->start; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1379 | |
| 1380 | /* Get the IRQ */ |
| 1381 | aes_dd->irq = platform_get_irq(pdev, 0); |
| 1382 | if (aes_dd->irq < 0) { |
| 1383 | dev_err(dev, "no IRQ resource info\n"); |
| 1384 | err = aes_dd->irq; |
LABBE Corentin | b0e8b34 | 2015-10-12 19:47:03 +0200 | [diff] [blame] | 1385 | goto res_err; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1386 | } |
| 1387 | |
LABBE Corentin | b0e8b34 | 2015-10-12 19:47:03 +0200 | [diff] [blame] | 1388 | err = devm_request_irq(&pdev->dev, aes_dd->irq, atmel_aes_irq, |
| 1389 | IRQF_SHARED, "atmel-aes", aes_dd); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1390 | if (err) { |
| 1391 | dev_err(dev, "unable to request aes irq.\n"); |
LABBE Corentin | b0e8b34 | 2015-10-12 19:47:03 +0200 | [diff] [blame] | 1392 | goto res_err; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1393 | } |
| 1394 | |
| 1395 | /* Initializing the clock */ |
LABBE Corentin | b0e8b34 | 2015-10-12 19:47:03 +0200 | [diff] [blame] | 1396 | aes_dd->iclk = devm_clk_get(&pdev->dev, "aes_clk"); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1397 | if (IS_ERR(aes_dd->iclk)) { |
Colin Ian King | be20835 | 2015-02-28 20:40:10 +0000 | [diff] [blame] | 1398 | dev_err(dev, "clock initialization failed.\n"); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1399 | err = PTR_ERR(aes_dd->iclk); |
LABBE Corentin | b0e8b34 | 2015-10-12 19:47:03 +0200 | [diff] [blame] | 1400 | goto res_err; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1401 | } |
| 1402 | |
LABBE Corentin | b0e8b34 | 2015-10-12 19:47:03 +0200 | [diff] [blame] | 1403 | aes_dd->io_base = devm_ioremap_resource(&pdev->dev, aes_res); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1404 | if (!aes_dd->io_base) { |
| 1405 | dev_err(dev, "can't ioremap\n"); |
| 1406 | err = -ENOMEM; |
LABBE Corentin | b0e8b34 | 2015-10-12 19:47:03 +0200 | [diff] [blame] | 1407 | goto res_err; |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1408 | } |
| 1409 | |
Cyrille Pitchen | aab0a39 | 2015-12-17 17:48:37 +0100 | [diff] [blame] | 1410 | err = atmel_aes_hw_version_init(aes_dd); |
| 1411 | if (err) |
| 1412 | goto res_err; |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1413 | |
| 1414 | atmel_aes_get_cap(aes_dd); |
| 1415 | |
| 1416 | err = atmel_aes_buff_init(aes_dd); |
| 1417 | if (err) |
| 1418 | goto err_aes_buff; |
| 1419 | |
| 1420 | err = atmel_aes_dma_init(aes_dd, pdata); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1421 | if (err) |
| 1422 | goto err_aes_dma; |
| 1423 | |
| 1424 | spin_lock(&atmel_aes.lock); |
| 1425 | list_add_tail(&aes_dd->list, &atmel_aes.dev_list); |
| 1426 | spin_unlock(&atmel_aes.lock); |
| 1427 | |
| 1428 | err = atmel_aes_register_algs(aes_dd); |
| 1429 | if (err) |
| 1430 | goto err_algs; |
| 1431 | |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 1432 | dev_info(dev, "Atmel AES - Using %s, %s for DMA transfers\n", |
| 1433 | dma_chan_name(aes_dd->dma_lch_in.chan), |
| 1434 | dma_chan_name(aes_dd->dma_lch_out.chan)); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1435 | |
| 1436 | return 0; |
| 1437 | |
| 1438 | err_algs: |
| 1439 | spin_lock(&atmel_aes.lock); |
| 1440 | list_del(&aes_dd->list); |
| 1441 | spin_unlock(&atmel_aes.lock); |
| 1442 | atmel_aes_dma_cleanup(aes_dd); |
| 1443 | err_aes_dma: |
Nicolas Royer | cadc4ab | 2013-02-20 17:10:24 +0100 | [diff] [blame] | 1444 | atmel_aes_buff_cleanup(aes_dd); |
| 1445 | err_aes_buff: |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1446 | res_err: |
| 1447 | tasklet_kill(&aes_dd->done_task); |
| 1448 | tasklet_kill(&aes_dd->queue_task); |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1449 | aes_dd_err: |
| 1450 | dev_err(dev, "initialization failed.\n"); |
| 1451 | |
| 1452 | return err; |
| 1453 | } |
| 1454 | |
Greg Kroah-Hartman | 49cfe4d | 2012-12-21 13:14:09 -0800 | [diff] [blame] | 1455 | static int atmel_aes_remove(struct platform_device *pdev) |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1456 | { |
| 1457 | static struct atmel_aes_dev *aes_dd; |
| 1458 | |
| 1459 | aes_dd = platform_get_drvdata(pdev); |
| 1460 | if (!aes_dd) |
| 1461 | return -ENODEV; |
| 1462 | spin_lock(&atmel_aes.lock); |
| 1463 | list_del(&aes_dd->list); |
| 1464 | spin_unlock(&atmel_aes.lock); |
| 1465 | |
| 1466 | atmel_aes_unregister_algs(aes_dd); |
| 1467 | |
| 1468 | tasklet_kill(&aes_dd->done_task); |
| 1469 | tasklet_kill(&aes_dd->queue_task); |
| 1470 | |
| 1471 | atmel_aes_dma_cleanup(aes_dd); |
| 1472 | |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1473 | return 0; |
| 1474 | } |
| 1475 | |
| 1476 | static struct platform_driver atmel_aes_driver = { |
| 1477 | .probe = atmel_aes_probe, |
Greg Kroah-Hartman | 49cfe4d | 2012-12-21 13:14:09 -0800 | [diff] [blame] | 1478 | .remove = atmel_aes_remove, |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1479 | .driver = { |
| 1480 | .name = "atmel_aes", |
Nicolas Ferre | be943c7 | 2013-10-14 17:52:38 +0200 | [diff] [blame] | 1481 | .of_match_table = of_match_ptr(atmel_aes_dt_ids), |
Nicolas Royer | bd3c7b5 | 2012-07-01 19:19:44 +0200 | [diff] [blame] | 1482 | }, |
| 1483 | }; |
| 1484 | |
| 1485 | module_platform_driver(atmel_aes_driver); |
| 1486 | |
| 1487 | MODULE_DESCRIPTION("Atmel AES hw acceleration support."); |
| 1488 | MODULE_LICENSE("GPL v2"); |
| 1489 | MODULE_AUTHOR("Nicolas Royer - Eukréa Electromatique"); |