Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1 | /* |
| 2 | * talitos - Freescale Integrated Security Engine (SEC) device driver |
| 3 | * |
| 4 | * Copyright (c) 2008 Freescale Semiconductor, Inc. |
| 5 | * |
| 6 | * Scatterlist Crypto API glue code copied from files with the following: |
| 7 | * Copyright (c) 2006-2007 Herbert Xu <herbert@gondor.apana.org.au> |
| 8 | * |
| 9 | * Crypto algorithm registration code copied from hifn driver: |
| 10 | * 2007+ Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru> |
| 11 | * All rights reserved. |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 26 | */ |
| 27 | |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/mod_devicetable.h> |
| 31 | #include <linux/device.h> |
| 32 | #include <linux/interrupt.h> |
| 33 | #include <linux/crypto.h> |
| 34 | #include <linux/hw_random.h> |
| 35 | #include <linux/of_platform.h> |
| 36 | #include <linux/dma-mapping.h> |
| 37 | #include <linux/io.h> |
| 38 | #include <linux/spinlock.h> |
| 39 | #include <linux/rtnetlink.h> |
| 40 | |
| 41 | #include <crypto/algapi.h> |
| 42 | #include <crypto/aes.h> |
Lee Nipper | 3952f17 | 2008-07-10 18:29:18 +0800 | [diff] [blame] | 43 | #include <crypto/des.h> |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 44 | #include <crypto/sha.h> |
| 45 | #include <crypto/aead.h> |
| 46 | #include <crypto/authenc.h> |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 47 | #include <crypto/skcipher.h> |
| 48 | #include <crypto/scatterwalk.h> |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 49 | |
| 50 | #include "talitos.h" |
| 51 | |
| 52 | #define TALITOS_TIMEOUT 100000 |
| 53 | #define TALITOS_MAX_DATA_LEN 65535 |
| 54 | |
| 55 | #define DESC_TYPE(desc_hdr) ((be32_to_cpu(desc_hdr) >> 3) & 0x1f) |
| 56 | #define PRIMARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 28) & 0xf) |
| 57 | #define SECONDARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 16) & 0xf) |
| 58 | |
| 59 | /* descriptor pointer entry */ |
| 60 | struct talitos_ptr { |
| 61 | __be16 len; /* length */ |
| 62 | u8 j_extent; /* jump to sg link table and/or extent */ |
| 63 | u8 eptr; /* extended address */ |
| 64 | __be32 ptr; /* address */ |
| 65 | }; |
| 66 | |
| 67 | /* descriptor */ |
| 68 | struct talitos_desc { |
| 69 | __be32 hdr; /* header high bits */ |
| 70 | __be32 hdr_lo; /* header low bits */ |
| 71 | struct talitos_ptr ptr[7]; /* ptr/len pair array */ |
| 72 | }; |
| 73 | |
| 74 | /** |
| 75 | * talitos_request - descriptor submission request |
| 76 | * @desc: descriptor pointer (kernel virtual) |
| 77 | * @dma_desc: descriptor's physical bus address |
| 78 | * @callback: whom to call when descriptor processing is done |
| 79 | * @context: caller context (optional) |
| 80 | */ |
| 81 | struct talitos_request { |
| 82 | struct talitos_desc *desc; |
| 83 | dma_addr_t dma_desc; |
| 84 | void (*callback) (struct device *dev, struct talitos_desc *desc, |
| 85 | void *context, int error); |
| 86 | void *context; |
| 87 | }; |
| 88 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 89 | /* per-channel fifo management */ |
| 90 | struct talitos_channel { |
| 91 | /* request fifo */ |
| 92 | struct talitos_request *fifo; |
| 93 | |
| 94 | /* number of requests pending in channel h/w fifo */ |
| 95 | atomic_t submit_count ____cacheline_aligned; |
| 96 | |
| 97 | /* request submission (head) lock */ |
| 98 | spinlock_t head_lock ____cacheline_aligned; |
| 99 | /* index to next free descriptor request */ |
| 100 | int head; |
| 101 | |
| 102 | /* request release (tail) lock */ |
| 103 | spinlock_t tail_lock ____cacheline_aligned; |
| 104 | /* index to next in-progress/done descriptor request */ |
| 105 | int tail; |
| 106 | }; |
| 107 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 108 | struct talitos_private { |
| 109 | struct device *dev; |
| 110 | struct of_device *ofdev; |
| 111 | void __iomem *reg; |
| 112 | int irq; |
| 113 | |
| 114 | /* SEC version geometry (from device tree node) */ |
| 115 | unsigned int num_channels; |
| 116 | unsigned int chfifo_len; |
| 117 | unsigned int exec_units; |
| 118 | unsigned int desc_types; |
| 119 | |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 120 | /* SEC Compatibility info */ |
| 121 | unsigned long features; |
| 122 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 123 | /* |
| 124 | * length of the request fifo |
| 125 | * fifo_len is chfifo_len rounded up to next power of 2 |
| 126 | * so we can use bitwise ops to wrap |
| 127 | */ |
| 128 | unsigned int fifo_len; |
| 129 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 130 | struct talitos_channel *chan; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 131 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 132 | /* next channel to be assigned next incoming descriptor */ |
| 133 | atomic_t last_chan ____cacheline_aligned; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 134 | |
| 135 | /* request callback tasklet */ |
| 136 | struct tasklet_struct done_task; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 137 | |
| 138 | /* list of registered algorithms */ |
| 139 | struct list_head alg_list; |
| 140 | |
| 141 | /* hwrng device */ |
| 142 | struct hwrng rng; |
| 143 | }; |
| 144 | |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 145 | /* .features flag */ |
| 146 | #define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001 |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 147 | #define TALITOS_FTR_HW_AUTH_CHECK 0x00000002 |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 148 | |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 149 | static void to_talitos_ptr(struct talitos_ptr *talitos_ptr, dma_addr_t dma_addr) |
| 150 | { |
| 151 | talitos_ptr->ptr = cpu_to_be32(lower_32_bits(dma_addr)); |
| 152 | talitos_ptr->eptr = cpu_to_be32(upper_32_bits(dma_addr)); |
| 153 | } |
| 154 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 155 | /* |
| 156 | * map virtual single (contiguous) pointer to h/w descriptor pointer |
| 157 | */ |
| 158 | static void map_single_talitos_ptr(struct device *dev, |
| 159 | struct talitos_ptr *talitos_ptr, |
| 160 | unsigned short len, void *data, |
| 161 | unsigned char extent, |
| 162 | enum dma_data_direction dir) |
| 163 | { |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 164 | dma_addr_t dma_addr = dma_map_single(dev, data, len, dir); |
| 165 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 166 | talitos_ptr->len = cpu_to_be16(len); |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 167 | to_talitos_ptr(talitos_ptr, dma_addr); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 168 | talitos_ptr->j_extent = extent; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * unmap bus single (contiguous) h/w descriptor pointer |
| 173 | */ |
| 174 | static void unmap_single_talitos_ptr(struct device *dev, |
| 175 | struct talitos_ptr *talitos_ptr, |
| 176 | enum dma_data_direction dir) |
| 177 | { |
| 178 | dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr), |
| 179 | be16_to_cpu(talitos_ptr->len), dir); |
| 180 | } |
| 181 | |
| 182 | static int reset_channel(struct device *dev, int ch) |
| 183 | { |
| 184 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 185 | unsigned int timeout = TALITOS_TIMEOUT; |
| 186 | |
| 187 | setbits32(priv->reg + TALITOS_CCCR(ch), TALITOS_CCCR_RESET); |
| 188 | |
| 189 | while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & TALITOS_CCCR_RESET) |
| 190 | && --timeout) |
| 191 | cpu_relax(); |
| 192 | |
| 193 | if (timeout == 0) { |
| 194 | dev_err(dev, "failed to reset channel %d\n", ch); |
| 195 | return -EIO; |
| 196 | } |
| 197 | |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 198 | /* set 36-bit addressing, done writeback enable and done IRQ enable */ |
| 199 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_EAE | |
| 200 | TALITOS_CCCR_LO_CDWE | TALITOS_CCCR_LO_CDIE); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 201 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 202 | /* and ICCR writeback, if available */ |
| 203 | if (priv->features & TALITOS_FTR_HW_AUTH_CHECK) |
| 204 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), |
| 205 | TALITOS_CCCR_LO_IWSE); |
| 206 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | static int reset_device(struct device *dev) |
| 211 | { |
| 212 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 213 | unsigned int timeout = TALITOS_TIMEOUT; |
| 214 | |
| 215 | setbits32(priv->reg + TALITOS_MCR, TALITOS_MCR_SWR); |
| 216 | |
| 217 | while ((in_be32(priv->reg + TALITOS_MCR) & TALITOS_MCR_SWR) |
| 218 | && --timeout) |
| 219 | cpu_relax(); |
| 220 | |
| 221 | if (timeout == 0) { |
| 222 | dev_err(dev, "failed to reset device\n"); |
| 223 | return -EIO; |
| 224 | } |
| 225 | |
| 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * Reset and initialize the device |
| 231 | */ |
| 232 | static int init_device(struct device *dev) |
| 233 | { |
| 234 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 235 | int ch, err; |
| 236 | |
| 237 | /* |
| 238 | * Master reset |
| 239 | * errata documentation: warning: certain SEC interrupts |
| 240 | * are not fully cleared by writing the MCR:SWR bit, |
| 241 | * set bit twice to completely reset |
| 242 | */ |
| 243 | err = reset_device(dev); |
| 244 | if (err) |
| 245 | return err; |
| 246 | |
| 247 | err = reset_device(dev); |
| 248 | if (err) |
| 249 | return err; |
| 250 | |
| 251 | /* reset channels */ |
| 252 | for (ch = 0; ch < priv->num_channels; ch++) { |
| 253 | err = reset_channel(dev, ch); |
| 254 | if (err) |
| 255 | return err; |
| 256 | } |
| 257 | |
| 258 | /* enable channel done and error interrupts */ |
| 259 | setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT); |
| 260 | setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); |
| 261 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 262 | /* disable integrity check error interrupts (use writeback instead) */ |
| 263 | if (priv->features & TALITOS_FTR_HW_AUTH_CHECK) |
| 264 | setbits32(priv->reg + TALITOS_MDEUICR_LO, |
| 265 | TALITOS_MDEUICR_LO_ICE); |
| 266 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * talitos_submit - submits a descriptor to the device for processing |
| 272 | * @dev: the SEC device to be used |
| 273 | * @desc: the descriptor to be processed by the device |
| 274 | * @callback: whom to call when processing is complete |
| 275 | * @context: a handle for use by caller (optional) |
| 276 | * |
| 277 | * desc must contain valid dma-mapped (bus physical) address pointers. |
| 278 | * callback must check err and feedback in descriptor header |
| 279 | * for device processing status. |
| 280 | */ |
| 281 | static int talitos_submit(struct device *dev, struct talitos_desc *desc, |
| 282 | void (*callback)(struct device *dev, |
| 283 | struct talitos_desc *desc, |
| 284 | void *context, int error), |
| 285 | void *context) |
| 286 | { |
| 287 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 288 | struct talitos_request *request; |
| 289 | unsigned long flags, ch; |
| 290 | int head; |
| 291 | |
| 292 | /* select done notification */ |
| 293 | desc->hdr |= DESC_HDR_DONE_NOTIFY; |
| 294 | |
| 295 | /* emulate SEC's round-robin channel fifo polling scheme */ |
| 296 | ch = atomic_inc_return(&priv->last_chan) & (priv->num_channels - 1); |
| 297 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 298 | spin_lock_irqsave(&priv->chan[ch].head_lock, flags); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 299 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 300 | if (!atomic_inc_not_zero(&priv->chan[ch].submit_count)) { |
Kim Phillips | ec6644d | 2008-07-17 20:16:40 +0800 | [diff] [blame] | 301 | /* h/w fifo is full */ |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 302 | spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 303 | return -EAGAIN; |
| 304 | } |
| 305 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 306 | head = priv->chan[ch].head; |
| 307 | request = &priv->chan[ch].fifo[head]; |
Kim Phillips | ec6644d | 2008-07-17 20:16:40 +0800 | [diff] [blame] | 308 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 309 | /* map descriptor and save caller data */ |
| 310 | request->dma_desc = dma_map_single(dev, desc, sizeof(*desc), |
| 311 | DMA_BIDIRECTIONAL); |
| 312 | request->callback = callback; |
| 313 | request->context = context; |
| 314 | |
| 315 | /* increment fifo head */ |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 316 | priv->chan[ch].head = (priv->chan[ch].head + 1) & (priv->fifo_len - 1); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 317 | |
| 318 | smp_wmb(); |
| 319 | request->desc = desc; |
| 320 | |
| 321 | /* GO! */ |
| 322 | wmb(); |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 323 | out_be32(priv->reg + TALITOS_FF(ch), |
| 324 | cpu_to_be32(upper_32_bits(request->dma_desc))); |
| 325 | out_be32(priv->reg + TALITOS_FF_LO(ch), |
| 326 | cpu_to_be32(lower_32_bits(request->dma_desc))); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 327 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 328 | spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 329 | |
| 330 | return -EINPROGRESS; |
| 331 | } |
| 332 | |
| 333 | /* |
| 334 | * process what was done, notify callback of error if not |
| 335 | */ |
| 336 | static void flush_channel(struct device *dev, int ch, int error, int reset_ch) |
| 337 | { |
| 338 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 339 | struct talitos_request *request, saved_req; |
| 340 | unsigned long flags; |
| 341 | int tail, status; |
| 342 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 343 | spin_lock_irqsave(&priv->chan[ch].tail_lock, flags); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 344 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 345 | tail = priv->chan[ch].tail; |
| 346 | while (priv->chan[ch].fifo[tail].desc) { |
| 347 | request = &priv->chan[ch].fifo[tail]; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 348 | |
| 349 | /* descriptors with their done bits set don't get the error */ |
| 350 | rmb(); |
Lee Nipper | ca38a81 | 2008-12-20 17:09:25 +1100 | [diff] [blame] | 351 | if ((request->desc->hdr & DESC_HDR_DONE) == DESC_HDR_DONE) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 352 | status = 0; |
Lee Nipper | ca38a81 | 2008-12-20 17:09:25 +1100 | [diff] [blame] | 353 | else |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 354 | if (!error) |
| 355 | break; |
| 356 | else |
| 357 | status = error; |
| 358 | |
| 359 | dma_unmap_single(dev, request->dma_desc, |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 360 | sizeof(struct talitos_desc), |
| 361 | DMA_BIDIRECTIONAL); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 362 | |
| 363 | /* copy entries so we can call callback outside lock */ |
| 364 | saved_req.desc = request->desc; |
| 365 | saved_req.callback = request->callback; |
| 366 | saved_req.context = request->context; |
| 367 | |
| 368 | /* release request entry in fifo */ |
| 369 | smp_wmb(); |
| 370 | request->desc = NULL; |
| 371 | |
| 372 | /* increment fifo tail */ |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 373 | priv->chan[ch].tail = (tail + 1) & (priv->fifo_len - 1); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 374 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 375 | spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags); |
Kim Phillips | ec6644d | 2008-07-17 20:16:40 +0800 | [diff] [blame] | 376 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 377 | atomic_dec(&priv->chan[ch].submit_count); |
Kim Phillips | ec6644d | 2008-07-17 20:16:40 +0800 | [diff] [blame] | 378 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 379 | saved_req.callback(dev, saved_req.desc, saved_req.context, |
| 380 | status); |
| 381 | /* channel may resume processing in single desc error case */ |
| 382 | if (error && !reset_ch && status == error) |
| 383 | return; |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 384 | spin_lock_irqsave(&priv->chan[ch].tail_lock, flags); |
| 385 | tail = priv->chan[ch].tail; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 386 | } |
| 387 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 388 | spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | /* |
| 392 | * process completed requests for channels that have done status |
| 393 | */ |
| 394 | static void talitos_done(unsigned long data) |
| 395 | { |
| 396 | struct device *dev = (struct device *)data; |
| 397 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 398 | int ch; |
| 399 | |
| 400 | for (ch = 0; ch < priv->num_channels; ch++) |
| 401 | flush_channel(dev, ch, 0, 0); |
Lee Nipper | 1c2e881 | 2008-10-12 20:29:34 +0800 | [diff] [blame] | 402 | |
| 403 | /* At this point, all completed channels have been processed. |
| 404 | * Unmask done interrupts for channels completed later on. |
| 405 | */ |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 406 | setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT); |
| 407 | setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | /* |
| 411 | * locate current (offending) descriptor |
| 412 | */ |
| 413 | static struct talitos_desc *current_desc(struct device *dev, int ch) |
| 414 | { |
| 415 | struct talitos_private *priv = dev_get_drvdata(dev); |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 416 | int tail = priv->chan[ch].tail; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 417 | dma_addr_t cur_desc; |
| 418 | |
| 419 | cur_desc = in_be32(priv->reg + TALITOS_CDPR_LO(ch)); |
| 420 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 421 | while (priv->chan[ch].fifo[tail].dma_desc != cur_desc) { |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 422 | tail = (tail + 1) & (priv->fifo_len - 1); |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 423 | if (tail == priv->chan[ch].tail) { |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 424 | dev_err(dev, "couldn't locate current descriptor\n"); |
| 425 | return NULL; |
| 426 | } |
| 427 | } |
| 428 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 429 | return priv->chan[ch].fifo[tail].desc; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | /* |
| 433 | * user diagnostics; report root cause of error based on execution unit status |
| 434 | */ |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 435 | static void report_eu_error(struct device *dev, int ch, |
| 436 | struct talitos_desc *desc) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 437 | { |
| 438 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 439 | int i; |
| 440 | |
| 441 | switch (desc->hdr & DESC_HDR_SEL0_MASK) { |
| 442 | case DESC_HDR_SEL0_AFEU: |
| 443 | dev_err(dev, "AFEUISR 0x%08x_%08x\n", |
| 444 | in_be32(priv->reg + TALITOS_AFEUISR), |
| 445 | in_be32(priv->reg + TALITOS_AFEUISR_LO)); |
| 446 | break; |
| 447 | case DESC_HDR_SEL0_DEU: |
| 448 | dev_err(dev, "DEUISR 0x%08x_%08x\n", |
| 449 | in_be32(priv->reg + TALITOS_DEUISR), |
| 450 | in_be32(priv->reg + TALITOS_DEUISR_LO)); |
| 451 | break; |
| 452 | case DESC_HDR_SEL0_MDEUA: |
| 453 | case DESC_HDR_SEL0_MDEUB: |
| 454 | dev_err(dev, "MDEUISR 0x%08x_%08x\n", |
| 455 | in_be32(priv->reg + TALITOS_MDEUISR), |
| 456 | in_be32(priv->reg + TALITOS_MDEUISR_LO)); |
| 457 | break; |
| 458 | case DESC_HDR_SEL0_RNG: |
| 459 | dev_err(dev, "RNGUISR 0x%08x_%08x\n", |
| 460 | in_be32(priv->reg + TALITOS_RNGUISR), |
| 461 | in_be32(priv->reg + TALITOS_RNGUISR_LO)); |
| 462 | break; |
| 463 | case DESC_HDR_SEL0_PKEU: |
| 464 | dev_err(dev, "PKEUISR 0x%08x_%08x\n", |
| 465 | in_be32(priv->reg + TALITOS_PKEUISR), |
| 466 | in_be32(priv->reg + TALITOS_PKEUISR_LO)); |
| 467 | break; |
| 468 | case DESC_HDR_SEL0_AESU: |
| 469 | dev_err(dev, "AESUISR 0x%08x_%08x\n", |
| 470 | in_be32(priv->reg + TALITOS_AESUISR), |
| 471 | in_be32(priv->reg + TALITOS_AESUISR_LO)); |
| 472 | break; |
| 473 | case DESC_HDR_SEL0_CRCU: |
| 474 | dev_err(dev, "CRCUISR 0x%08x_%08x\n", |
| 475 | in_be32(priv->reg + TALITOS_CRCUISR), |
| 476 | in_be32(priv->reg + TALITOS_CRCUISR_LO)); |
| 477 | break; |
| 478 | case DESC_HDR_SEL0_KEU: |
| 479 | dev_err(dev, "KEUISR 0x%08x_%08x\n", |
| 480 | in_be32(priv->reg + TALITOS_KEUISR), |
| 481 | in_be32(priv->reg + TALITOS_KEUISR_LO)); |
| 482 | break; |
| 483 | } |
| 484 | |
| 485 | switch (desc->hdr & DESC_HDR_SEL1_MASK) { |
| 486 | case DESC_HDR_SEL1_MDEUA: |
| 487 | case DESC_HDR_SEL1_MDEUB: |
| 488 | dev_err(dev, "MDEUISR 0x%08x_%08x\n", |
| 489 | in_be32(priv->reg + TALITOS_MDEUISR), |
| 490 | in_be32(priv->reg + TALITOS_MDEUISR_LO)); |
| 491 | break; |
| 492 | case DESC_HDR_SEL1_CRCU: |
| 493 | dev_err(dev, "CRCUISR 0x%08x_%08x\n", |
| 494 | in_be32(priv->reg + TALITOS_CRCUISR), |
| 495 | in_be32(priv->reg + TALITOS_CRCUISR_LO)); |
| 496 | break; |
| 497 | } |
| 498 | |
| 499 | for (i = 0; i < 8; i++) |
| 500 | dev_err(dev, "DESCBUF 0x%08x_%08x\n", |
| 501 | in_be32(priv->reg + TALITOS_DESCBUF(ch) + 8*i), |
| 502 | in_be32(priv->reg + TALITOS_DESCBUF_LO(ch) + 8*i)); |
| 503 | } |
| 504 | |
| 505 | /* |
| 506 | * recover from error interrupts |
| 507 | */ |
Kim Phillips | 40405f1 | 2008-10-12 20:19:35 +0800 | [diff] [blame] | 508 | static void talitos_error(unsigned long data, u32 isr, u32 isr_lo) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 509 | { |
| 510 | struct device *dev = (struct device *)data; |
| 511 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 512 | unsigned int timeout = TALITOS_TIMEOUT; |
| 513 | int ch, error, reset_dev = 0, reset_ch = 0; |
Kim Phillips | 40405f1 | 2008-10-12 20:19:35 +0800 | [diff] [blame] | 514 | u32 v, v_lo; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 515 | |
| 516 | for (ch = 0; ch < priv->num_channels; ch++) { |
| 517 | /* skip channels without errors */ |
| 518 | if (!(isr & (1 << (ch * 2 + 1)))) |
| 519 | continue; |
| 520 | |
| 521 | error = -EINVAL; |
| 522 | |
| 523 | v = in_be32(priv->reg + TALITOS_CCPSR(ch)); |
| 524 | v_lo = in_be32(priv->reg + TALITOS_CCPSR_LO(ch)); |
| 525 | |
| 526 | if (v_lo & TALITOS_CCPSR_LO_DOF) { |
| 527 | dev_err(dev, "double fetch fifo overflow error\n"); |
| 528 | error = -EAGAIN; |
| 529 | reset_ch = 1; |
| 530 | } |
| 531 | if (v_lo & TALITOS_CCPSR_LO_SOF) { |
| 532 | /* h/w dropped descriptor */ |
| 533 | dev_err(dev, "single fetch fifo overflow error\n"); |
| 534 | error = -EAGAIN; |
| 535 | } |
| 536 | if (v_lo & TALITOS_CCPSR_LO_MDTE) |
| 537 | dev_err(dev, "master data transfer error\n"); |
| 538 | if (v_lo & TALITOS_CCPSR_LO_SGDLZ) |
| 539 | dev_err(dev, "s/g data length zero error\n"); |
| 540 | if (v_lo & TALITOS_CCPSR_LO_FPZ) |
| 541 | dev_err(dev, "fetch pointer zero error\n"); |
| 542 | if (v_lo & TALITOS_CCPSR_LO_IDH) |
| 543 | dev_err(dev, "illegal descriptor header error\n"); |
| 544 | if (v_lo & TALITOS_CCPSR_LO_IEU) |
| 545 | dev_err(dev, "invalid execution unit error\n"); |
| 546 | if (v_lo & TALITOS_CCPSR_LO_EU) |
| 547 | report_eu_error(dev, ch, current_desc(dev, ch)); |
| 548 | if (v_lo & TALITOS_CCPSR_LO_GB) |
| 549 | dev_err(dev, "gather boundary error\n"); |
| 550 | if (v_lo & TALITOS_CCPSR_LO_GRL) |
| 551 | dev_err(dev, "gather return/length error\n"); |
| 552 | if (v_lo & TALITOS_CCPSR_LO_SB) |
| 553 | dev_err(dev, "scatter boundary error\n"); |
| 554 | if (v_lo & TALITOS_CCPSR_LO_SRL) |
| 555 | dev_err(dev, "scatter return/length error\n"); |
| 556 | |
| 557 | flush_channel(dev, ch, error, reset_ch); |
| 558 | |
| 559 | if (reset_ch) { |
| 560 | reset_channel(dev, ch); |
| 561 | } else { |
| 562 | setbits32(priv->reg + TALITOS_CCCR(ch), |
| 563 | TALITOS_CCCR_CONT); |
| 564 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), 0); |
| 565 | while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & |
| 566 | TALITOS_CCCR_CONT) && --timeout) |
| 567 | cpu_relax(); |
| 568 | if (timeout == 0) { |
| 569 | dev_err(dev, "failed to restart channel %d\n", |
| 570 | ch); |
| 571 | reset_dev = 1; |
| 572 | } |
| 573 | } |
| 574 | } |
| 575 | if (reset_dev || isr & ~TALITOS_ISR_CHERR || isr_lo) { |
| 576 | dev_err(dev, "done overflow, internal time out, or rngu error: " |
| 577 | "ISR 0x%08x_%08x\n", isr, isr_lo); |
| 578 | |
| 579 | /* purge request queues */ |
| 580 | for (ch = 0; ch < priv->num_channels; ch++) |
| 581 | flush_channel(dev, ch, -EIO, 1); |
| 582 | |
| 583 | /* reset and reinitialize the device */ |
| 584 | init_device(dev); |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | static irqreturn_t talitos_interrupt(int irq, void *data) |
| 589 | { |
| 590 | struct device *dev = data; |
| 591 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 592 | u32 isr, isr_lo; |
| 593 | |
| 594 | isr = in_be32(priv->reg + TALITOS_ISR); |
| 595 | isr_lo = in_be32(priv->reg + TALITOS_ISR_LO); |
Lee Nipper | ca38a81 | 2008-12-20 17:09:25 +1100 | [diff] [blame] | 596 | /* Acknowledge interrupt */ |
| 597 | out_be32(priv->reg + TALITOS_ICR, isr); |
| 598 | out_be32(priv->reg + TALITOS_ICR_LO, isr_lo); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 599 | |
Lee Nipper | ca38a81 | 2008-12-20 17:09:25 +1100 | [diff] [blame] | 600 | if (unlikely((isr & ~TALITOS_ISR_CHDONE) || isr_lo)) |
Kim Phillips | 40405f1 | 2008-10-12 20:19:35 +0800 | [diff] [blame] | 601 | talitos_error((unsigned long)data, isr, isr_lo); |
Lee Nipper | ca38a81 | 2008-12-20 17:09:25 +1100 | [diff] [blame] | 602 | else |
Lee Nipper | 1c2e881 | 2008-10-12 20:29:34 +0800 | [diff] [blame] | 603 | if (likely(isr & TALITOS_ISR_CHDONE)) { |
| 604 | /* mask further done interrupts. */ |
| 605 | clrbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_DONE); |
| 606 | /* done_task will unmask done interrupts at exit */ |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 607 | tasklet_schedule(&priv->done_task); |
Lee Nipper | 1c2e881 | 2008-10-12 20:29:34 +0800 | [diff] [blame] | 608 | } |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 609 | |
| 610 | return (isr || isr_lo) ? IRQ_HANDLED : IRQ_NONE; |
| 611 | } |
| 612 | |
| 613 | /* |
| 614 | * hwrng |
| 615 | */ |
| 616 | static int talitos_rng_data_present(struct hwrng *rng, int wait) |
| 617 | { |
| 618 | struct device *dev = (struct device *)rng->priv; |
| 619 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 620 | u32 ofl; |
| 621 | int i; |
| 622 | |
| 623 | for (i = 0; i < 20; i++) { |
| 624 | ofl = in_be32(priv->reg + TALITOS_RNGUSR_LO) & |
| 625 | TALITOS_RNGUSR_LO_OFL; |
| 626 | if (ofl || !wait) |
| 627 | break; |
| 628 | udelay(10); |
| 629 | } |
| 630 | |
| 631 | return !!ofl; |
| 632 | } |
| 633 | |
| 634 | static int talitos_rng_data_read(struct hwrng *rng, u32 *data) |
| 635 | { |
| 636 | struct device *dev = (struct device *)rng->priv; |
| 637 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 638 | |
| 639 | /* rng fifo requires 64-bit accesses */ |
| 640 | *data = in_be32(priv->reg + TALITOS_RNGU_FIFO); |
| 641 | *data = in_be32(priv->reg + TALITOS_RNGU_FIFO_LO); |
| 642 | |
| 643 | return sizeof(u32); |
| 644 | } |
| 645 | |
| 646 | static int talitos_rng_init(struct hwrng *rng) |
| 647 | { |
| 648 | struct device *dev = (struct device *)rng->priv; |
| 649 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 650 | unsigned int timeout = TALITOS_TIMEOUT; |
| 651 | |
| 652 | setbits32(priv->reg + TALITOS_RNGURCR_LO, TALITOS_RNGURCR_LO_SR); |
| 653 | while (!(in_be32(priv->reg + TALITOS_RNGUSR_LO) & TALITOS_RNGUSR_LO_RD) |
| 654 | && --timeout) |
| 655 | cpu_relax(); |
| 656 | if (timeout == 0) { |
| 657 | dev_err(dev, "failed to reset rng hw\n"); |
| 658 | return -ENODEV; |
| 659 | } |
| 660 | |
| 661 | /* start generating */ |
| 662 | setbits32(priv->reg + TALITOS_RNGUDSR_LO, 0); |
| 663 | |
| 664 | return 0; |
| 665 | } |
| 666 | |
| 667 | static int talitos_register_rng(struct device *dev) |
| 668 | { |
| 669 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 670 | |
| 671 | priv->rng.name = dev_driver_string(dev), |
| 672 | priv->rng.init = talitos_rng_init, |
| 673 | priv->rng.data_present = talitos_rng_data_present, |
| 674 | priv->rng.data_read = talitos_rng_data_read, |
| 675 | priv->rng.priv = (unsigned long)dev; |
| 676 | |
| 677 | return hwrng_register(&priv->rng); |
| 678 | } |
| 679 | |
| 680 | static void talitos_unregister_rng(struct device *dev) |
| 681 | { |
| 682 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 683 | |
| 684 | hwrng_unregister(&priv->rng); |
| 685 | } |
| 686 | |
| 687 | /* |
| 688 | * crypto alg |
| 689 | */ |
| 690 | #define TALITOS_CRA_PRIORITY 3000 |
| 691 | #define TALITOS_MAX_KEY_SIZE 64 |
Lee Nipper | 3952f17 | 2008-07-10 18:29:18 +0800 | [diff] [blame] | 692 | #define TALITOS_MAX_IV_LENGTH 16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */ |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 693 | |
Lee Nipper | 3952f17 | 2008-07-10 18:29:18 +0800 | [diff] [blame] | 694 | #define MD5_DIGEST_SIZE 16 |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 695 | |
| 696 | struct talitos_ctx { |
| 697 | struct device *dev; |
| 698 | __be32 desc_hdr_template; |
| 699 | u8 key[TALITOS_MAX_KEY_SIZE]; |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 700 | u8 iv[TALITOS_MAX_IV_LENGTH]; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 701 | unsigned int keylen; |
| 702 | unsigned int enckeylen; |
| 703 | unsigned int authkeylen; |
| 704 | unsigned int authsize; |
| 705 | }; |
| 706 | |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 707 | static int aead_setauthsize(struct crypto_aead *authenc, |
| 708 | unsigned int authsize) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 709 | { |
| 710 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); |
| 711 | |
| 712 | ctx->authsize = authsize; |
| 713 | |
| 714 | return 0; |
| 715 | } |
| 716 | |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 717 | static int aead_setkey(struct crypto_aead *authenc, |
| 718 | const u8 *key, unsigned int keylen) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 719 | { |
| 720 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); |
| 721 | struct rtattr *rta = (void *)key; |
| 722 | struct crypto_authenc_key_param *param; |
| 723 | unsigned int authkeylen; |
| 724 | unsigned int enckeylen; |
| 725 | |
| 726 | if (!RTA_OK(rta, keylen)) |
| 727 | goto badkey; |
| 728 | |
| 729 | if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) |
| 730 | goto badkey; |
| 731 | |
| 732 | if (RTA_PAYLOAD(rta) < sizeof(*param)) |
| 733 | goto badkey; |
| 734 | |
| 735 | param = RTA_DATA(rta); |
| 736 | enckeylen = be32_to_cpu(param->enckeylen); |
| 737 | |
| 738 | key += RTA_ALIGN(rta->rta_len); |
| 739 | keylen -= RTA_ALIGN(rta->rta_len); |
| 740 | |
| 741 | if (keylen < enckeylen) |
| 742 | goto badkey; |
| 743 | |
| 744 | authkeylen = keylen - enckeylen; |
| 745 | |
| 746 | if (keylen > TALITOS_MAX_KEY_SIZE) |
| 747 | goto badkey; |
| 748 | |
| 749 | memcpy(&ctx->key, key, keylen); |
| 750 | |
| 751 | ctx->keylen = keylen; |
| 752 | ctx->enckeylen = enckeylen; |
| 753 | ctx->authkeylen = authkeylen; |
| 754 | |
| 755 | return 0; |
| 756 | |
| 757 | badkey: |
| 758 | crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| 759 | return -EINVAL; |
| 760 | } |
| 761 | |
| 762 | /* |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 763 | * talitos_edesc - s/w-extended descriptor |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 764 | * @src_nents: number of segments in input scatterlist |
| 765 | * @dst_nents: number of segments in output scatterlist |
| 766 | * @dma_len: length of dma mapped link_tbl space |
| 767 | * @dma_link_tbl: bus physical address of link_tbl |
| 768 | * @desc: h/w descriptor |
| 769 | * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1) |
| 770 | * |
| 771 | * if decrypting (with authcheck), or either one of src_nents or dst_nents |
| 772 | * is greater than 1, an integrity check value is concatenated to the end |
| 773 | * of link_tbl data |
| 774 | */ |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 775 | struct talitos_edesc { |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 776 | int src_nents; |
| 777 | int dst_nents; |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 778 | int src_is_chained; |
| 779 | int dst_is_chained; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 780 | int dma_len; |
| 781 | dma_addr_t dma_link_tbl; |
| 782 | struct talitos_desc desc; |
| 783 | struct talitos_ptr link_tbl[0]; |
| 784 | }; |
| 785 | |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 786 | static int talitos_map_sg(struct device *dev, struct scatterlist *sg, |
| 787 | unsigned int nents, enum dma_data_direction dir, |
| 788 | int chained) |
| 789 | { |
| 790 | if (unlikely(chained)) |
| 791 | while (sg) { |
| 792 | dma_map_sg(dev, sg, 1, dir); |
| 793 | sg = scatterwalk_sg_next(sg); |
| 794 | } |
| 795 | else |
| 796 | dma_map_sg(dev, sg, nents, dir); |
| 797 | return nents; |
| 798 | } |
| 799 | |
| 800 | static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg, |
| 801 | enum dma_data_direction dir) |
| 802 | { |
| 803 | while (sg) { |
| 804 | dma_unmap_sg(dev, sg, 1, dir); |
| 805 | sg = scatterwalk_sg_next(sg); |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | static void talitos_sg_unmap(struct device *dev, |
| 810 | struct talitos_edesc *edesc, |
| 811 | struct scatterlist *src, |
| 812 | struct scatterlist *dst) |
| 813 | { |
| 814 | unsigned int src_nents = edesc->src_nents ? : 1; |
| 815 | unsigned int dst_nents = edesc->dst_nents ? : 1; |
| 816 | |
| 817 | if (src != dst) { |
| 818 | if (edesc->src_is_chained) |
| 819 | talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE); |
| 820 | else |
| 821 | dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE); |
| 822 | |
| 823 | if (edesc->dst_is_chained) |
| 824 | talitos_unmap_sg_chain(dev, dst, DMA_FROM_DEVICE); |
| 825 | else |
| 826 | dma_unmap_sg(dev, dst, dst_nents, DMA_FROM_DEVICE); |
| 827 | } else |
| 828 | if (edesc->src_is_chained) |
| 829 | talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL); |
| 830 | else |
| 831 | dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL); |
| 832 | } |
| 833 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 834 | static void ipsec_esp_unmap(struct device *dev, |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 835 | struct talitos_edesc *edesc, |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 836 | struct aead_request *areq) |
| 837 | { |
| 838 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE); |
| 839 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE); |
| 840 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE); |
| 841 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE); |
| 842 | |
| 843 | dma_unmap_sg(dev, areq->assoc, 1, DMA_TO_DEVICE); |
| 844 | |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 845 | talitos_sg_unmap(dev, edesc, areq->src, areq->dst); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 846 | |
| 847 | if (edesc->dma_len) |
| 848 | dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len, |
| 849 | DMA_BIDIRECTIONAL); |
| 850 | } |
| 851 | |
| 852 | /* |
| 853 | * ipsec_esp descriptor callbacks |
| 854 | */ |
| 855 | static void ipsec_esp_encrypt_done(struct device *dev, |
| 856 | struct talitos_desc *desc, void *context, |
| 857 | int err) |
| 858 | { |
| 859 | struct aead_request *areq = context; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 860 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); |
| 861 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); |
Kim Phillips | 19bbbc6 | 2009-03-29 15:53:59 +0800 | [diff] [blame] | 862 | struct talitos_edesc *edesc; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 863 | struct scatterlist *sg; |
| 864 | void *icvdata; |
| 865 | |
Kim Phillips | 19bbbc6 | 2009-03-29 15:53:59 +0800 | [diff] [blame] | 866 | edesc = container_of(desc, struct talitos_edesc, desc); |
| 867 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 868 | ipsec_esp_unmap(dev, edesc, areq); |
| 869 | |
| 870 | /* copy the generated ICV to dst */ |
| 871 | if (edesc->dma_len) { |
| 872 | icvdata = &edesc->link_tbl[edesc->src_nents + |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 873 | edesc->dst_nents + 2]; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 874 | sg = sg_last(areq->dst, edesc->dst_nents); |
| 875 | memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize, |
| 876 | icvdata, ctx->authsize); |
| 877 | } |
| 878 | |
| 879 | kfree(edesc); |
| 880 | |
| 881 | aead_request_complete(areq, err); |
| 882 | } |
| 883 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 884 | static void ipsec_esp_decrypt_swauth_done(struct device *dev, |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 885 | struct talitos_desc *desc, |
| 886 | void *context, int err) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 887 | { |
| 888 | struct aead_request *req = context; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 889 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); |
| 890 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); |
Kim Phillips | 19bbbc6 | 2009-03-29 15:53:59 +0800 | [diff] [blame] | 891 | struct talitos_edesc *edesc; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 892 | struct scatterlist *sg; |
| 893 | void *icvdata; |
| 894 | |
Kim Phillips | 19bbbc6 | 2009-03-29 15:53:59 +0800 | [diff] [blame] | 895 | edesc = container_of(desc, struct talitos_edesc, desc); |
| 896 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 897 | ipsec_esp_unmap(dev, edesc, req); |
| 898 | |
| 899 | if (!err) { |
| 900 | /* auth check */ |
| 901 | if (edesc->dma_len) |
| 902 | icvdata = &edesc->link_tbl[edesc->src_nents + |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 903 | edesc->dst_nents + 2]; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 904 | else |
| 905 | icvdata = &edesc->link_tbl[0]; |
| 906 | |
| 907 | sg = sg_last(req->dst, edesc->dst_nents ? : 1); |
| 908 | err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length - |
| 909 | ctx->authsize, ctx->authsize) ? -EBADMSG : 0; |
| 910 | } |
| 911 | |
| 912 | kfree(edesc); |
| 913 | |
| 914 | aead_request_complete(req, err); |
| 915 | } |
| 916 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 917 | static void ipsec_esp_decrypt_hwauth_done(struct device *dev, |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 918 | struct talitos_desc *desc, |
| 919 | void *context, int err) |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 920 | { |
| 921 | struct aead_request *req = context; |
Kim Phillips | 19bbbc6 | 2009-03-29 15:53:59 +0800 | [diff] [blame] | 922 | struct talitos_edesc *edesc; |
| 923 | |
| 924 | edesc = container_of(desc, struct talitos_edesc, desc); |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 925 | |
| 926 | ipsec_esp_unmap(dev, edesc, req); |
| 927 | |
| 928 | /* check ICV auth status */ |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 929 | if (!err && ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) != |
| 930 | DESC_HDR_LO_ICCR1_PASS)) |
| 931 | err = -EBADMSG; |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 932 | |
| 933 | kfree(edesc); |
| 934 | |
| 935 | aead_request_complete(req, err); |
| 936 | } |
| 937 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 938 | /* |
| 939 | * convert scatterlist to SEC h/w link table format |
| 940 | * stop at cryptlen bytes |
| 941 | */ |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 942 | static int sg_to_link_tbl(struct scatterlist *sg, int sg_count, |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 943 | int cryptlen, struct talitos_ptr *link_tbl_ptr) |
| 944 | { |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 945 | int n_sg = sg_count; |
| 946 | |
| 947 | while (n_sg--) { |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 948 | to_talitos_ptr(link_tbl_ptr, sg_dma_address(sg)); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 949 | link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg)); |
| 950 | link_tbl_ptr->j_extent = 0; |
| 951 | link_tbl_ptr++; |
| 952 | cryptlen -= sg_dma_len(sg); |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 953 | sg = scatterwalk_sg_next(sg); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 954 | } |
| 955 | |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 956 | /* adjust (decrease) last one (or two) entry's len to cryptlen */ |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 957 | link_tbl_ptr--; |
Kim Phillips | c0e741d | 2008-07-17 20:20:59 +0800 | [diff] [blame] | 958 | while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) { |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 959 | /* Empty this entry, and move to previous one */ |
| 960 | cryptlen += be16_to_cpu(link_tbl_ptr->len); |
| 961 | link_tbl_ptr->len = 0; |
| 962 | sg_count--; |
| 963 | link_tbl_ptr--; |
| 964 | } |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 965 | link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len) |
| 966 | + cryptlen); |
| 967 | |
| 968 | /* tag end of link table */ |
| 969 | link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN; |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 970 | |
| 971 | return sg_count; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 972 | } |
| 973 | |
| 974 | /* |
| 975 | * fill in and submit ipsec_esp descriptor |
| 976 | */ |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 977 | static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq, |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 978 | u8 *giv, u64 seq, |
| 979 | void (*callback) (struct device *dev, |
| 980 | struct talitos_desc *desc, |
| 981 | void *context, int error)) |
| 982 | { |
| 983 | struct crypto_aead *aead = crypto_aead_reqtfm(areq); |
| 984 | struct talitos_ctx *ctx = crypto_aead_ctx(aead); |
| 985 | struct device *dev = ctx->dev; |
| 986 | struct talitos_desc *desc = &edesc->desc; |
| 987 | unsigned int cryptlen = areq->cryptlen; |
| 988 | unsigned int authsize = ctx->authsize; |
Kim Phillips | e41256f | 2009-08-13 11:49:06 +1000 | [diff] [blame] | 989 | unsigned int ivsize = crypto_aead_ivsize(aead); |
Kim Phillips | fa86a26 | 2008-07-17 20:20:06 +0800 | [diff] [blame] | 990 | int sg_count, ret; |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 991 | int sg_link_tbl_len; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 992 | |
| 993 | /* hmac key */ |
| 994 | map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key, |
| 995 | 0, DMA_TO_DEVICE); |
| 996 | /* hmac data */ |
Kim Phillips | e41256f | 2009-08-13 11:49:06 +1000 | [diff] [blame] | 997 | map_single_talitos_ptr(dev, &desc->ptr[1], areq->assoclen + ivsize, |
| 998 | sg_virt(areq->assoc), 0, DMA_TO_DEVICE); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 999 | /* cipher iv */ |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1000 | map_single_talitos_ptr(dev, &desc->ptr[2], ivsize, giv ?: areq->iv, 0, |
| 1001 | DMA_TO_DEVICE); |
| 1002 | |
| 1003 | /* cipher key */ |
| 1004 | map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen, |
| 1005 | (char *)&ctx->key + ctx->authkeylen, 0, |
| 1006 | DMA_TO_DEVICE); |
| 1007 | |
| 1008 | /* |
| 1009 | * cipher in |
| 1010 | * map and adjust cipher len to aead request cryptlen. |
| 1011 | * extent is bytes of HMAC postpended to ciphertext, |
| 1012 | * typically 12 for ipsec |
| 1013 | */ |
| 1014 | desc->ptr[4].len = cpu_to_be16(cryptlen); |
| 1015 | desc->ptr[4].j_extent = authsize; |
| 1016 | |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 1017 | sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1, |
| 1018 | (areq->src == areq->dst) ? DMA_BIDIRECTIONAL |
| 1019 | : DMA_TO_DEVICE, |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1020 | edesc->src_is_chained); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1021 | |
| 1022 | if (sg_count == 1) { |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1023 | to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src)); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1024 | } else { |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1025 | sg_link_tbl_len = cryptlen; |
| 1026 | |
Kim Phillips | 962a9c9 | 2009-03-29 15:54:30 +0800 | [diff] [blame] | 1027 | if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV) |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1028 | sg_link_tbl_len = cryptlen + authsize; |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 1029 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1030 | sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len, |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 1031 | &edesc->link_tbl[0]); |
| 1032 | if (sg_count > 1) { |
| 1033 | desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP; |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1034 | to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl); |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 1035 | dma_sync_single_for_device(dev, edesc->dma_link_tbl, |
| 1036 | edesc->dma_len, |
| 1037 | DMA_BIDIRECTIONAL); |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 1038 | } else { |
| 1039 | /* Only one segment now, so no link tbl needed */ |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1040 | to_talitos_ptr(&desc->ptr[4], |
| 1041 | sg_dma_address(areq->src)); |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 1042 | } |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1043 | } |
| 1044 | |
| 1045 | /* cipher out */ |
| 1046 | desc->ptr[5].len = cpu_to_be16(cryptlen); |
| 1047 | desc->ptr[5].j_extent = authsize; |
| 1048 | |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 1049 | if (areq->src != areq->dst) |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1050 | sg_count = talitos_map_sg(dev, areq->dst, |
| 1051 | edesc->dst_nents ? : 1, |
| 1052 | DMA_FROM_DEVICE, |
| 1053 | edesc->dst_is_chained); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1054 | |
| 1055 | if (sg_count == 1) { |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1056 | to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst)); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1057 | } else { |
| 1058 | struct talitos_ptr *link_tbl_ptr = |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 1059 | &edesc->link_tbl[edesc->src_nents + 1]; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1060 | |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1061 | to_talitos_ptr(&desc->ptr[5], edesc->dma_link_tbl + |
| 1062 | (edesc->src_nents + 1) * |
| 1063 | sizeof(struct talitos_ptr)); |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1064 | sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen, |
| 1065 | link_tbl_ptr); |
| 1066 | |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 1067 | /* Add an entry to the link table for ICV data */ |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1068 | link_tbl_ptr += sg_count - 1; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1069 | link_tbl_ptr->j_extent = 0; |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 1070 | sg_count++; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1071 | link_tbl_ptr++; |
| 1072 | link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN; |
| 1073 | link_tbl_ptr->len = cpu_to_be16(authsize); |
| 1074 | |
| 1075 | /* icv data follows link tables */ |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1076 | to_talitos_ptr(link_tbl_ptr, edesc->dma_link_tbl + |
| 1077 | (edesc->src_nents + edesc->dst_nents + 2) * |
| 1078 | sizeof(struct talitos_ptr)); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1079 | desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP; |
| 1080 | dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, |
| 1081 | edesc->dma_len, DMA_BIDIRECTIONAL); |
| 1082 | } |
| 1083 | |
| 1084 | /* iv out */ |
| 1085 | map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0, |
| 1086 | DMA_FROM_DEVICE); |
| 1087 | |
Kim Phillips | fa86a26 | 2008-07-17 20:20:06 +0800 | [diff] [blame] | 1088 | ret = talitos_submit(dev, desc, callback, areq); |
| 1089 | if (ret != -EINPROGRESS) { |
| 1090 | ipsec_esp_unmap(dev, edesc, areq); |
| 1091 | kfree(edesc); |
| 1092 | } |
| 1093 | return ret; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1094 | } |
| 1095 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1096 | /* |
| 1097 | * derive number of elements in scatterlist |
| 1098 | */ |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1099 | static int sg_count(struct scatterlist *sg_list, int nbytes, int *chained) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1100 | { |
| 1101 | struct scatterlist *sg = sg_list; |
| 1102 | int sg_nents = 0; |
| 1103 | |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1104 | *chained = 0; |
| 1105 | while (nbytes > 0) { |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1106 | sg_nents++; |
| 1107 | nbytes -= sg->length; |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1108 | if (!sg_is_last(sg) && (sg + 1)->length == 0) |
| 1109 | *chained = 1; |
| 1110 | sg = scatterwalk_sg_next(sg); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1111 | } |
| 1112 | |
| 1113 | return sg_nents; |
| 1114 | } |
| 1115 | |
| 1116 | /* |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1117 | * allocate and map the extended descriptor |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1118 | */ |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1119 | static struct talitos_edesc *talitos_edesc_alloc(struct device *dev, |
| 1120 | struct scatterlist *src, |
| 1121 | struct scatterlist *dst, |
| 1122 | unsigned int cryptlen, |
| 1123 | unsigned int authsize, |
| 1124 | int icv_stashing, |
| 1125 | u32 cryptoflags) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1126 | { |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1127 | struct talitos_edesc *edesc; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1128 | int src_nents, dst_nents, alloc_len, dma_len; |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1129 | int src_chained, dst_chained = 0; |
| 1130 | gfp_t flags = cryptoflags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : |
Kim Phillips | 586725f | 2008-07-17 20:19:18 +0800 | [diff] [blame] | 1131 | GFP_ATOMIC; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1132 | |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1133 | if (cryptlen + authsize > TALITOS_MAX_DATA_LEN) { |
| 1134 | dev_err(dev, "length exceeds h/w max limit\n"); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1135 | return ERR_PTR(-EINVAL); |
| 1136 | } |
| 1137 | |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1138 | src_nents = sg_count(src, cryptlen + authsize, &src_chained); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1139 | src_nents = (src_nents == 1) ? 0 : src_nents; |
| 1140 | |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1141 | if (dst == src) { |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1142 | dst_nents = src_nents; |
| 1143 | } else { |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1144 | dst_nents = sg_count(dst, cryptlen + authsize, &dst_chained); |
Lee Nipper | 695ad58 | 2008-07-17 16:22:30 +0800 | [diff] [blame] | 1145 | dst_nents = (dst_nents == 1) ? 0 : dst_nents; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1146 | } |
| 1147 | |
| 1148 | /* |
| 1149 | * allocate space for base edesc plus the link tables, |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 1150 | * allowing for two separate entries for ICV and generated ICV (+ 2), |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1151 | * and the ICV data itself |
| 1152 | */ |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1153 | alloc_len = sizeof(struct talitos_edesc); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1154 | if (src_nents || dst_nents) { |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 1155 | dma_len = (src_nents + dst_nents + 2) * |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1156 | sizeof(struct talitos_ptr) + authsize; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1157 | alloc_len += dma_len; |
| 1158 | } else { |
| 1159 | dma_len = 0; |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1160 | alloc_len += icv_stashing ? authsize : 0; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1161 | } |
| 1162 | |
Kim Phillips | 586725f | 2008-07-17 20:19:18 +0800 | [diff] [blame] | 1163 | edesc = kmalloc(alloc_len, GFP_DMA | flags); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1164 | if (!edesc) { |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1165 | dev_err(dev, "could not allocate edescriptor\n"); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1166 | return ERR_PTR(-ENOMEM); |
| 1167 | } |
| 1168 | |
| 1169 | edesc->src_nents = src_nents; |
| 1170 | edesc->dst_nents = dst_nents; |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1171 | edesc->src_is_chained = src_chained; |
| 1172 | edesc->dst_is_chained = dst_chained; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1173 | edesc->dma_len = dma_len; |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1174 | edesc->dma_link_tbl = dma_map_single(dev, &edesc->link_tbl[0], |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1175 | edesc->dma_len, DMA_BIDIRECTIONAL); |
| 1176 | |
| 1177 | return edesc; |
| 1178 | } |
| 1179 | |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1180 | static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq, |
| 1181 | int icv_stashing) |
| 1182 | { |
| 1183 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); |
| 1184 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); |
| 1185 | |
| 1186 | return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, |
| 1187 | areq->cryptlen, ctx->authsize, icv_stashing, |
| 1188 | areq->base.flags); |
| 1189 | } |
| 1190 | |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1191 | static int aead_encrypt(struct aead_request *req) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1192 | { |
| 1193 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); |
| 1194 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1195 | struct talitos_edesc *edesc; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1196 | |
| 1197 | /* allocate extended descriptor */ |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1198 | edesc = aead_edesc_alloc(req, 0); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1199 | if (IS_ERR(edesc)) |
| 1200 | return PTR_ERR(edesc); |
| 1201 | |
| 1202 | /* set encrypt */ |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 1203 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1204 | |
| 1205 | return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_encrypt_done); |
| 1206 | } |
| 1207 | |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1208 | static int aead_decrypt(struct aead_request *req) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1209 | { |
| 1210 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); |
| 1211 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); |
| 1212 | unsigned int authsize = ctx->authsize; |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1213 | struct talitos_private *priv = dev_get_drvdata(ctx->dev); |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1214 | struct talitos_edesc *edesc; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1215 | struct scatterlist *sg; |
| 1216 | void *icvdata; |
| 1217 | |
| 1218 | req->cryptlen -= authsize; |
| 1219 | |
| 1220 | /* allocate extended descriptor */ |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1221 | edesc = aead_edesc_alloc(req, 1); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1222 | if (IS_ERR(edesc)) |
| 1223 | return PTR_ERR(edesc); |
| 1224 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1225 | if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) && |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 1226 | ((!edesc->src_nents && !edesc->dst_nents) || |
| 1227 | priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT)) { |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1228 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1229 | /* decrypt and check the ICV */ |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 1230 | edesc->desc.hdr = ctx->desc_hdr_template | |
| 1231 | DESC_HDR_DIR_INBOUND | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1232 | DESC_HDR_MODE1_MDEU_CICV; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1233 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1234 | /* reset integrity check result bits */ |
| 1235 | edesc->desc.hdr_lo = 0; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1236 | |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 1237 | return ipsec_esp(edesc, req, NULL, 0, |
| 1238 | ipsec_esp_decrypt_hwauth_done); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1239 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1240 | } |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 1241 | |
| 1242 | /* Have to check the ICV with software */ |
| 1243 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND; |
| 1244 | |
| 1245 | /* stash incoming ICV for later cmp with ICV generated by the h/w */ |
| 1246 | if (edesc->dma_len) |
| 1247 | icvdata = &edesc->link_tbl[edesc->src_nents + |
| 1248 | edesc->dst_nents + 2]; |
| 1249 | else |
| 1250 | icvdata = &edesc->link_tbl[0]; |
| 1251 | |
| 1252 | sg = sg_last(req->src, edesc->src_nents ? : 1); |
| 1253 | |
| 1254 | memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize, |
| 1255 | ctx->authsize); |
| 1256 | |
| 1257 | return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_swauth_done); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1258 | } |
| 1259 | |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1260 | static int aead_givencrypt(struct aead_givcrypt_request *req) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1261 | { |
| 1262 | struct aead_request *areq = &req->areq; |
| 1263 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); |
| 1264 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1265 | struct talitos_edesc *edesc; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1266 | |
| 1267 | /* allocate extended descriptor */ |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1268 | edesc = aead_edesc_alloc(areq, 0); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1269 | if (IS_ERR(edesc)) |
| 1270 | return PTR_ERR(edesc); |
| 1271 | |
| 1272 | /* set encrypt */ |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 1273 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1274 | |
| 1275 | memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc)); |
Kim Phillips | ba95487 | 2008-09-14 13:41:19 -0700 | [diff] [blame] | 1276 | /* avoid consecutive packets going out with same IV */ |
| 1277 | *(__be64 *)req->giv ^= cpu_to_be64(req->seq); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1278 | |
| 1279 | return ipsec_esp(edesc, areq, req->giv, req->seq, |
| 1280 | ipsec_esp_encrypt_done); |
| 1281 | } |
| 1282 | |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1283 | static int ablkcipher_setkey(struct crypto_ablkcipher *cipher, |
| 1284 | const u8 *key, unsigned int keylen) |
| 1285 | { |
| 1286 | struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 1287 | struct ablkcipher_alg *alg = crypto_ablkcipher_alg(cipher); |
| 1288 | |
| 1289 | if (keylen > TALITOS_MAX_KEY_SIZE) |
| 1290 | goto badkey; |
| 1291 | |
| 1292 | if (keylen < alg->min_keysize || keylen > alg->max_keysize) |
| 1293 | goto badkey; |
| 1294 | |
| 1295 | memcpy(&ctx->key, key, keylen); |
| 1296 | ctx->keylen = keylen; |
| 1297 | |
| 1298 | return 0; |
| 1299 | |
| 1300 | badkey: |
| 1301 | crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| 1302 | return -EINVAL; |
| 1303 | } |
| 1304 | |
| 1305 | static void common_nonsnoop_unmap(struct device *dev, |
| 1306 | struct talitos_edesc *edesc, |
| 1307 | struct ablkcipher_request *areq) |
| 1308 | { |
| 1309 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE); |
| 1310 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE); |
| 1311 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1], DMA_TO_DEVICE); |
| 1312 | |
| 1313 | talitos_sg_unmap(dev, edesc, areq->src, areq->dst); |
| 1314 | |
| 1315 | if (edesc->dma_len) |
| 1316 | dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len, |
| 1317 | DMA_BIDIRECTIONAL); |
| 1318 | } |
| 1319 | |
| 1320 | static void ablkcipher_done(struct device *dev, |
| 1321 | struct talitos_desc *desc, void *context, |
| 1322 | int err) |
| 1323 | { |
| 1324 | struct ablkcipher_request *areq = context; |
Kim Phillips | 19bbbc6 | 2009-03-29 15:53:59 +0800 | [diff] [blame] | 1325 | struct talitos_edesc *edesc; |
| 1326 | |
| 1327 | edesc = container_of(desc, struct talitos_edesc, desc); |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1328 | |
| 1329 | common_nonsnoop_unmap(dev, edesc, areq); |
| 1330 | |
| 1331 | kfree(edesc); |
| 1332 | |
| 1333 | areq->base.complete(&areq->base, err); |
| 1334 | } |
| 1335 | |
| 1336 | static int common_nonsnoop(struct talitos_edesc *edesc, |
| 1337 | struct ablkcipher_request *areq, |
| 1338 | u8 *giv, |
| 1339 | void (*callback) (struct device *dev, |
| 1340 | struct talitos_desc *desc, |
| 1341 | void *context, int error)) |
| 1342 | { |
| 1343 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); |
| 1344 | struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 1345 | struct device *dev = ctx->dev; |
| 1346 | struct talitos_desc *desc = &edesc->desc; |
| 1347 | unsigned int cryptlen = areq->nbytes; |
| 1348 | unsigned int ivsize; |
| 1349 | int sg_count, ret; |
| 1350 | |
| 1351 | /* first DWORD empty */ |
| 1352 | desc->ptr[0].len = 0; |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1353 | to_talitos_ptr(&desc->ptr[0], 0); |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1354 | desc->ptr[0].j_extent = 0; |
| 1355 | |
| 1356 | /* cipher iv */ |
| 1357 | ivsize = crypto_ablkcipher_ivsize(cipher); |
| 1358 | map_single_talitos_ptr(dev, &desc->ptr[1], ivsize, giv ?: areq->info, 0, |
| 1359 | DMA_TO_DEVICE); |
| 1360 | |
| 1361 | /* cipher key */ |
| 1362 | map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen, |
| 1363 | (char *)&ctx->key, 0, DMA_TO_DEVICE); |
| 1364 | |
| 1365 | /* |
| 1366 | * cipher in |
| 1367 | */ |
| 1368 | desc->ptr[3].len = cpu_to_be16(cryptlen); |
| 1369 | desc->ptr[3].j_extent = 0; |
| 1370 | |
| 1371 | sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1, |
| 1372 | (areq->src == areq->dst) ? DMA_BIDIRECTIONAL |
| 1373 | : DMA_TO_DEVICE, |
| 1374 | edesc->src_is_chained); |
| 1375 | |
| 1376 | if (sg_count == 1) { |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1377 | to_talitos_ptr(&desc->ptr[3], sg_dma_address(areq->src)); |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1378 | } else { |
| 1379 | sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen, |
| 1380 | &edesc->link_tbl[0]); |
| 1381 | if (sg_count > 1) { |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1382 | to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl); |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1383 | desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP; |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 1384 | dma_sync_single_for_device(dev, edesc->dma_link_tbl, |
| 1385 | edesc->dma_len, |
| 1386 | DMA_BIDIRECTIONAL); |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1387 | } else { |
| 1388 | /* Only one segment now, so no link tbl needed */ |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1389 | to_talitos_ptr(&desc->ptr[3], |
| 1390 | sg_dma_address(areq->src)); |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1391 | } |
| 1392 | } |
| 1393 | |
| 1394 | /* cipher out */ |
| 1395 | desc->ptr[4].len = cpu_to_be16(cryptlen); |
| 1396 | desc->ptr[4].j_extent = 0; |
| 1397 | |
| 1398 | if (areq->src != areq->dst) |
| 1399 | sg_count = talitos_map_sg(dev, areq->dst, |
| 1400 | edesc->dst_nents ? : 1, |
| 1401 | DMA_FROM_DEVICE, |
| 1402 | edesc->dst_is_chained); |
| 1403 | |
| 1404 | if (sg_count == 1) { |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1405 | to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->dst)); |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1406 | } else { |
| 1407 | struct talitos_ptr *link_tbl_ptr = |
| 1408 | &edesc->link_tbl[edesc->src_nents + 1]; |
| 1409 | |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1410 | to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl + |
| 1411 | (edesc->src_nents + 1) * |
| 1412 | sizeof(struct talitos_ptr)); |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1413 | desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP; |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1414 | sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen, |
| 1415 | link_tbl_ptr); |
| 1416 | dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, |
| 1417 | edesc->dma_len, DMA_BIDIRECTIONAL); |
| 1418 | } |
| 1419 | |
| 1420 | /* iv out */ |
| 1421 | map_single_talitos_ptr(dev, &desc->ptr[5], ivsize, ctx->iv, 0, |
| 1422 | DMA_FROM_DEVICE); |
| 1423 | |
| 1424 | /* last DWORD empty */ |
| 1425 | desc->ptr[6].len = 0; |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1426 | to_talitos_ptr(&desc->ptr[6], 0); |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1427 | desc->ptr[6].j_extent = 0; |
| 1428 | |
| 1429 | ret = talitos_submit(dev, desc, callback, areq); |
| 1430 | if (ret != -EINPROGRESS) { |
| 1431 | common_nonsnoop_unmap(dev, edesc, areq); |
| 1432 | kfree(edesc); |
| 1433 | } |
| 1434 | return ret; |
| 1435 | } |
| 1436 | |
Kim Phillips | e938e46 | 2009-03-29 15:53:23 +0800 | [diff] [blame] | 1437 | static struct talitos_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request * |
| 1438 | areq) |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1439 | { |
| 1440 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); |
| 1441 | struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 1442 | |
| 1443 | return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, areq->nbytes, |
| 1444 | 0, 0, areq->base.flags); |
| 1445 | } |
| 1446 | |
| 1447 | static int ablkcipher_encrypt(struct ablkcipher_request *areq) |
| 1448 | { |
| 1449 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); |
| 1450 | struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 1451 | struct talitos_edesc *edesc; |
| 1452 | |
| 1453 | /* allocate extended descriptor */ |
| 1454 | edesc = ablkcipher_edesc_alloc(areq); |
| 1455 | if (IS_ERR(edesc)) |
| 1456 | return PTR_ERR(edesc); |
| 1457 | |
| 1458 | /* set encrypt */ |
| 1459 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; |
| 1460 | |
| 1461 | return common_nonsnoop(edesc, areq, NULL, ablkcipher_done); |
| 1462 | } |
| 1463 | |
| 1464 | static int ablkcipher_decrypt(struct ablkcipher_request *areq) |
| 1465 | { |
| 1466 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); |
| 1467 | struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 1468 | struct talitos_edesc *edesc; |
| 1469 | |
| 1470 | /* allocate extended descriptor */ |
| 1471 | edesc = ablkcipher_edesc_alloc(areq); |
| 1472 | if (IS_ERR(edesc)) |
| 1473 | return PTR_ERR(edesc); |
| 1474 | |
| 1475 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND; |
| 1476 | |
| 1477 | return common_nonsnoop(edesc, areq, NULL, ablkcipher_done); |
| 1478 | } |
| 1479 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1480 | struct talitos_alg_template { |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1481 | struct crypto_alg alg; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1482 | __be32 desc_hdr_template; |
| 1483 | }; |
| 1484 | |
| 1485 | static struct talitos_alg_template driver_algs[] = { |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1486 | /* AEAD algorithms. These use a single-pass ipsec_esp descriptor */ |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1487 | { |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1488 | .alg = { |
| 1489 | .cra_name = "authenc(hmac(sha1),cbc(aes))", |
| 1490 | .cra_driver_name = "authenc-hmac-sha1-cbc-aes-talitos", |
| 1491 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1492 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, |
| 1493 | .cra_type = &crypto_aead_type, |
| 1494 | .cra_aead = { |
| 1495 | .setkey = aead_setkey, |
| 1496 | .setauthsize = aead_setauthsize, |
| 1497 | .encrypt = aead_encrypt, |
| 1498 | .decrypt = aead_decrypt, |
| 1499 | .givencrypt = aead_givencrypt, |
| 1500 | .geniv = "<built-in>", |
| 1501 | .ivsize = AES_BLOCK_SIZE, |
| 1502 | .maxauthsize = SHA1_DIGEST_SIZE, |
| 1503 | } |
| 1504 | }, |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1505 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
| 1506 | DESC_HDR_SEL0_AESU | |
| 1507 | DESC_HDR_MODE0_AESU_CBC | |
| 1508 | DESC_HDR_SEL1_MDEUA | |
| 1509 | DESC_HDR_MODE1_MDEU_INIT | |
| 1510 | DESC_HDR_MODE1_MDEU_PAD | |
| 1511 | DESC_HDR_MODE1_MDEU_SHA1_HMAC, |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 1512 | }, |
| 1513 | { |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1514 | .alg = { |
| 1515 | .cra_name = "authenc(hmac(sha1),cbc(des3_ede))", |
| 1516 | .cra_driver_name = "authenc-hmac-sha1-cbc-3des-talitos", |
| 1517 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
| 1518 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, |
| 1519 | .cra_type = &crypto_aead_type, |
| 1520 | .cra_aead = { |
| 1521 | .setkey = aead_setkey, |
| 1522 | .setauthsize = aead_setauthsize, |
| 1523 | .encrypt = aead_encrypt, |
| 1524 | .decrypt = aead_decrypt, |
| 1525 | .givencrypt = aead_givencrypt, |
| 1526 | .geniv = "<built-in>", |
| 1527 | .ivsize = DES3_EDE_BLOCK_SIZE, |
| 1528 | .maxauthsize = SHA1_DIGEST_SIZE, |
| 1529 | } |
| 1530 | }, |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 1531 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
| 1532 | DESC_HDR_SEL0_DEU | |
| 1533 | DESC_HDR_MODE0_DEU_CBC | |
| 1534 | DESC_HDR_MODE0_DEU_3DES | |
| 1535 | DESC_HDR_SEL1_MDEUA | |
| 1536 | DESC_HDR_MODE1_MDEU_INIT | |
| 1537 | DESC_HDR_MODE1_MDEU_PAD | |
| 1538 | DESC_HDR_MODE1_MDEU_SHA1_HMAC, |
Lee Nipper | 3952f17 | 2008-07-10 18:29:18 +0800 | [diff] [blame] | 1539 | }, |
| 1540 | { |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1541 | .alg = { |
| 1542 | .cra_name = "authenc(hmac(sha256),cbc(aes))", |
| 1543 | .cra_driver_name = "authenc-hmac-sha256-cbc-aes-talitos", |
| 1544 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1545 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, |
| 1546 | .cra_type = &crypto_aead_type, |
| 1547 | .cra_aead = { |
| 1548 | .setkey = aead_setkey, |
| 1549 | .setauthsize = aead_setauthsize, |
| 1550 | .encrypt = aead_encrypt, |
| 1551 | .decrypt = aead_decrypt, |
| 1552 | .givencrypt = aead_givencrypt, |
| 1553 | .geniv = "<built-in>", |
| 1554 | .ivsize = AES_BLOCK_SIZE, |
| 1555 | .maxauthsize = SHA256_DIGEST_SIZE, |
| 1556 | } |
| 1557 | }, |
Lee Nipper | 3952f17 | 2008-07-10 18:29:18 +0800 | [diff] [blame] | 1558 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
| 1559 | DESC_HDR_SEL0_AESU | |
| 1560 | DESC_HDR_MODE0_AESU_CBC | |
| 1561 | DESC_HDR_SEL1_MDEUA | |
| 1562 | DESC_HDR_MODE1_MDEU_INIT | |
| 1563 | DESC_HDR_MODE1_MDEU_PAD | |
| 1564 | DESC_HDR_MODE1_MDEU_SHA256_HMAC, |
| 1565 | }, |
| 1566 | { |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1567 | .alg = { |
| 1568 | .cra_name = "authenc(hmac(sha256),cbc(des3_ede))", |
| 1569 | .cra_driver_name = "authenc-hmac-sha256-cbc-3des-talitos", |
| 1570 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
| 1571 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, |
| 1572 | .cra_type = &crypto_aead_type, |
| 1573 | .cra_aead = { |
| 1574 | .setkey = aead_setkey, |
| 1575 | .setauthsize = aead_setauthsize, |
| 1576 | .encrypt = aead_encrypt, |
| 1577 | .decrypt = aead_decrypt, |
| 1578 | .givencrypt = aead_givencrypt, |
| 1579 | .geniv = "<built-in>", |
| 1580 | .ivsize = DES3_EDE_BLOCK_SIZE, |
| 1581 | .maxauthsize = SHA256_DIGEST_SIZE, |
| 1582 | } |
| 1583 | }, |
Lee Nipper | 3952f17 | 2008-07-10 18:29:18 +0800 | [diff] [blame] | 1584 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
| 1585 | DESC_HDR_SEL0_DEU | |
| 1586 | DESC_HDR_MODE0_DEU_CBC | |
| 1587 | DESC_HDR_MODE0_DEU_3DES | |
| 1588 | DESC_HDR_SEL1_MDEUA | |
| 1589 | DESC_HDR_MODE1_MDEU_INIT | |
| 1590 | DESC_HDR_MODE1_MDEU_PAD | |
| 1591 | DESC_HDR_MODE1_MDEU_SHA256_HMAC, |
| 1592 | }, |
| 1593 | { |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1594 | .alg = { |
| 1595 | .cra_name = "authenc(hmac(md5),cbc(aes))", |
| 1596 | .cra_driver_name = "authenc-hmac-md5-cbc-aes-talitos", |
| 1597 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1598 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, |
| 1599 | .cra_type = &crypto_aead_type, |
| 1600 | .cra_aead = { |
| 1601 | .setkey = aead_setkey, |
| 1602 | .setauthsize = aead_setauthsize, |
| 1603 | .encrypt = aead_encrypt, |
| 1604 | .decrypt = aead_decrypt, |
| 1605 | .givencrypt = aead_givencrypt, |
| 1606 | .geniv = "<built-in>", |
| 1607 | .ivsize = AES_BLOCK_SIZE, |
| 1608 | .maxauthsize = MD5_DIGEST_SIZE, |
| 1609 | } |
| 1610 | }, |
Lee Nipper | 3952f17 | 2008-07-10 18:29:18 +0800 | [diff] [blame] | 1611 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
| 1612 | DESC_HDR_SEL0_AESU | |
| 1613 | DESC_HDR_MODE0_AESU_CBC | |
| 1614 | DESC_HDR_SEL1_MDEUA | |
| 1615 | DESC_HDR_MODE1_MDEU_INIT | |
| 1616 | DESC_HDR_MODE1_MDEU_PAD | |
| 1617 | DESC_HDR_MODE1_MDEU_MD5_HMAC, |
| 1618 | }, |
| 1619 | { |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1620 | .alg = { |
| 1621 | .cra_name = "authenc(hmac(md5),cbc(des3_ede))", |
| 1622 | .cra_driver_name = "authenc-hmac-md5-cbc-3des-talitos", |
| 1623 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
| 1624 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, |
| 1625 | .cra_type = &crypto_aead_type, |
| 1626 | .cra_aead = { |
| 1627 | .setkey = aead_setkey, |
| 1628 | .setauthsize = aead_setauthsize, |
| 1629 | .encrypt = aead_encrypt, |
| 1630 | .decrypt = aead_decrypt, |
| 1631 | .givencrypt = aead_givencrypt, |
| 1632 | .geniv = "<built-in>", |
| 1633 | .ivsize = DES3_EDE_BLOCK_SIZE, |
| 1634 | .maxauthsize = MD5_DIGEST_SIZE, |
| 1635 | } |
| 1636 | }, |
Lee Nipper | 3952f17 | 2008-07-10 18:29:18 +0800 | [diff] [blame] | 1637 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
| 1638 | DESC_HDR_SEL0_DEU | |
| 1639 | DESC_HDR_MODE0_DEU_CBC | |
| 1640 | DESC_HDR_MODE0_DEU_3DES | |
| 1641 | DESC_HDR_SEL1_MDEUA | |
| 1642 | DESC_HDR_MODE1_MDEU_INIT | |
| 1643 | DESC_HDR_MODE1_MDEU_PAD | |
| 1644 | DESC_HDR_MODE1_MDEU_MD5_HMAC, |
Lee Nipper | 4de9d0b | 2009-03-29 15:52:32 +0800 | [diff] [blame] | 1645 | }, |
| 1646 | /* ABLKCIPHER algorithms. */ |
| 1647 | { |
| 1648 | .alg = { |
| 1649 | .cra_name = "cbc(aes)", |
| 1650 | .cra_driver_name = "cbc-aes-talitos", |
| 1651 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1652 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
| 1653 | CRYPTO_ALG_ASYNC, |
| 1654 | .cra_type = &crypto_ablkcipher_type, |
| 1655 | .cra_ablkcipher = { |
| 1656 | .setkey = ablkcipher_setkey, |
| 1657 | .encrypt = ablkcipher_encrypt, |
| 1658 | .decrypt = ablkcipher_decrypt, |
| 1659 | .geniv = "eseqiv", |
| 1660 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1661 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1662 | .ivsize = AES_BLOCK_SIZE, |
| 1663 | } |
| 1664 | }, |
| 1665 | .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | |
| 1666 | DESC_HDR_SEL0_AESU | |
| 1667 | DESC_HDR_MODE0_AESU_CBC, |
| 1668 | }, |
| 1669 | { |
| 1670 | .alg = { |
| 1671 | .cra_name = "cbc(des3_ede)", |
| 1672 | .cra_driver_name = "cbc-3des-talitos", |
| 1673 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
| 1674 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
| 1675 | CRYPTO_ALG_ASYNC, |
| 1676 | .cra_type = &crypto_ablkcipher_type, |
| 1677 | .cra_ablkcipher = { |
| 1678 | .setkey = ablkcipher_setkey, |
| 1679 | .encrypt = ablkcipher_encrypt, |
| 1680 | .decrypt = ablkcipher_decrypt, |
| 1681 | .geniv = "eseqiv", |
| 1682 | .min_keysize = DES3_EDE_KEY_SIZE, |
| 1683 | .max_keysize = DES3_EDE_KEY_SIZE, |
| 1684 | .ivsize = DES3_EDE_BLOCK_SIZE, |
| 1685 | } |
| 1686 | }, |
| 1687 | .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | |
| 1688 | DESC_HDR_SEL0_DEU | |
| 1689 | DESC_HDR_MODE0_DEU_CBC | |
| 1690 | DESC_HDR_MODE0_DEU_3DES, |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1691 | } |
| 1692 | }; |
| 1693 | |
| 1694 | struct talitos_crypto_alg { |
| 1695 | struct list_head entry; |
| 1696 | struct device *dev; |
| 1697 | __be32 desc_hdr_template; |
| 1698 | struct crypto_alg crypto_alg; |
| 1699 | }; |
| 1700 | |
| 1701 | static int talitos_cra_init(struct crypto_tfm *tfm) |
| 1702 | { |
| 1703 | struct crypto_alg *alg = tfm->__crt_alg; |
Kim Phillips | 19bbbc6 | 2009-03-29 15:53:59 +0800 | [diff] [blame] | 1704 | struct talitos_crypto_alg *talitos_alg; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1705 | struct talitos_ctx *ctx = crypto_tfm_ctx(tfm); |
| 1706 | |
Kim Phillips | 19bbbc6 | 2009-03-29 15:53:59 +0800 | [diff] [blame] | 1707 | talitos_alg = container_of(alg, struct talitos_crypto_alg, crypto_alg); |
| 1708 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1709 | /* update context with ptr to dev */ |
| 1710 | ctx->dev = talitos_alg->dev; |
Kim Phillips | 19bbbc6 | 2009-03-29 15:53:59 +0800 | [diff] [blame] | 1711 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1712 | /* copy descriptor header template value */ |
| 1713 | ctx->desc_hdr_template = talitos_alg->desc_hdr_template; |
| 1714 | |
| 1715 | /* random first IV */ |
Lee Nipper | 70bcaca | 2008-07-03 19:08:46 +0800 | [diff] [blame] | 1716 | get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1717 | |
| 1718 | return 0; |
| 1719 | } |
| 1720 | |
| 1721 | /* |
| 1722 | * given the alg's descriptor header template, determine whether descriptor |
| 1723 | * type and primary/secondary execution units required match the hw |
| 1724 | * capabilities description provided in the device tree node. |
| 1725 | */ |
| 1726 | static int hw_supports(struct device *dev, __be32 desc_hdr_template) |
| 1727 | { |
| 1728 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 1729 | int ret; |
| 1730 | |
| 1731 | ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) && |
| 1732 | (1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units); |
| 1733 | |
| 1734 | if (SECONDARY_EU(desc_hdr_template)) |
| 1735 | ret = ret && (1 << SECONDARY_EU(desc_hdr_template) |
| 1736 | & priv->exec_units); |
| 1737 | |
| 1738 | return ret; |
| 1739 | } |
| 1740 | |
Al Viro | 596f103 | 2008-11-22 17:34:24 +0000 | [diff] [blame] | 1741 | static int talitos_remove(struct of_device *ofdev) |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1742 | { |
| 1743 | struct device *dev = &ofdev->dev; |
| 1744 | struct talitos_private *priv = dev_get_drvdata(dev); |
| 1745 | struct talitos_crypto_alg *t_alg, *n; |
| 1746 | int i; |
| 1747 | |
| 1748 | list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) { |
| 1749 | crypto_unregister_alg(&t_alg->crypto_alg); |
| 1750 | list_del(&t_alg->entry); |
| 1751 | kfree(t_alg); |
| 1752 | } |
| 1753 | |
| 1754 | if (hw_supports(dev, DESC_HDR_SEL0_RNG)) |
| 1755 | talitos_unregister_rng(dev); |
| 1756 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 1757 | for (i = 0; i < priv->num_channels; i++) |
| 1758 | if (priv->chan[i].fifo) |
| 1759 | kfree(priv->chan[i].fifo); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1760 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 1761 | kfree(priv->chan); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1762 | |
| 1763 | if (priv->irq != NO_IRQ) { |
| 1764 | free_irq(priv->irq, dev); |
| 1765 | irq_dispose_mapping(priv->irq); |
| 1766 | } |
| 1767 | |
| 1768 | tasklet_kill(&priv->done_task); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1769 | |
| 1770 | iounmap(priv->reg); |
| 1771 | |
| 1772 | dev_set_drvdata(dev, NULL); |
| 1773 | |
| 1774 | kfree(priv); |
| 1775 | |
| 1776 | return 0; |
| 1777 | } |
| 1778 | |
| 1779 | static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev, |
| 1780 | struct talitos_alg_template |
| 1781 | *template) |
| 1782 | { |
| 1783 | struct talitos_crypto_alg *t_alg; |
| 1784 | struct crypto_alg *alg; |
| 1785 | |
| 1786 | t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL); |
| 1787 | if (!t_alg) |
| 1788 | return ERR_PTR(-ENOMEM); |
| 1789 | |
| 1790 | alg = &t_alg->crypto_alg; |
Lee Nipper | 56af8cd | 2009-03-29 15:50:50 +0800 | [diff] [blame] | 1791 | *alg = template->alg; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1792 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1793 | alg->cra_module = THIS_MODULE; |
| 1794 | alg->cra_init = talitos_cra_init; |
| 1795 | alg->cra_priority = TALITOS_CRA_PRIORITY; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1796 | alg->cra_alignmask = 0; |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1797 | alg->cra_ctxsize = sizeof(struct talitos_ctx); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1798 | |
| 1799 | t_alg->desc_hdr_template = template->desc_hdr_template; |
| 1800 | t_alg->dev = dev; |
| 1801 | |
| 1802 | return t_alg; |
| 1803 | } |
| 1804 | |
| 1805 | static int talitos_probe(struct of_device *ofdev, |
| 1806 | const struct of_device_id *match) |
| 1807 | { |
| 1808 | struct device *dev = &ofdev->dev; |
| 1809 | struct device_node *np = ofdev->node; |
| 1810 | struct talitos_private *priv; |
| 1811 | const unsigned int *prop; |
| 1812 | int i, err; |
| 1813 | |
| 1814 | priv = kzalloc(sizeof(struct talitos_private), GFP_KERNEL); |
| 1815 | if (!priv) |
| 1816 | return -ENOMEM; |
| 1817 | |
| 1818 | dev_set_drvdata(dev, priv); |
| 1819 | |
| 1820 | priv->ofdev = ofdev; |
| 1821 | |
| 1822 | tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1823 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1824 | INIT_LIST_HEAD(&priv->alg_list); |
| 1825 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1826 | priv->irq = irq_of_parse_and_map(np, 0); |
| 1827 | |
| 1828 | if (priv->irq == NO_IRQ) { |
| 1829 | dev_err(dev, "failed to map irq\n"); |
| 1830 | err = -EINVAL; |
| 1831 | goto err_out; |
| 1832 | } |
| 1833 | |
| 1834 | /* get the irq line */ |
| 1835 | err = request_irq(priv->irq, talitos_interrupt, 0, |
| 1836 | dev_driver_string(dev), dev); |
| 1837 | if (err) { |
| 1838 | dev_err(dev, "failed to request irq %d\n", priv->irq); |
| 1839 | irq_dispose_mapping(priv->irq); |
| 1840 | priv->irq = NO_IRQ; |
| 1841 | goto err_out; |
| 1842 | } |
| 1843 | |
| 1844 | priv->reg = of_iomap(np, 0); |
| 1845 | if (!priv->reg) { |
| 1846 | dev_err(dev, "failed to of_iomap\n"); |
| 1847 | err = -ENOMEM; |
| 1848 | goto err_out; |
| 1849 | } |
| 1850 | |
| 1851 | /* get SEC version capabilities from device tree */ |
| 1852 | prop = of_get_property(np, "fsl,num-channels", NULL); |
| 1853 | if (prop) |
| 1854 | priv->num_channels = *prop; |
| 1855 | |
| 1856 | prop = of_get_property(np, "fsl,channel-fifo-len", NULL); |
| 1857 | if (prop) |
| 1858 | priv->chfifo_len = *prop; |
| 1859 | |
| 1860 | prop = of_get_property(np, "fsl,exec-units-mask", NULL); |
| 1861 | if (prop) |
| 1862 | priv->exec_units = *prop; |
| 1863 | |
| 1864 | prop = of_get_property(np, "fsl,descriptor-types-mask", NULL); |
| 1865 | if (prop) |
| 1866 | priv->desc_types = *prop; |
| 1867 | |
| 1868 | if (!is_power_of_2(priv->num_channels) || !priv->chfifo_len || |
| 1869 | !priv->exec_units || !priv->desc_types) { |
| 1870 | dev_err(dev, "invalid property data in device tree node\n"); |
| 1871 | err = -EINVAL; |
| 1872 | goto err_out; |
| 1873 | } |
| 1874 | |
Lee Nipper | f3c85bc | 2008-07-30 16:26:57 +0800 | [diff] [blame] | 1875 | if (of_device_is_compatible(np, "fsl,sec3.0")) |
| 1876 | priv->features |= TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT; |
| 1877 | |
Kim Phillips | fe5720e | 2008-10-12 20:33:14 +0800 | [diff] [blame] | 1878 | if (of_device_is_compatible(np, "fsl,sec2.1")) |
| 1879 | priv->features |= TALITOS_FTR_HW_AUTH_CHECK; |
| 1880 | |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 1881 | priv->chan = kzalloc(sizeof(struct talitos_channel) * |
| 1882 | priv->num_channels, GFP_KERNEL); |
| 1883 | if (!priv->chan) { |
| 1884 | dev_err(dev, "failed to allocate channel management space\n"); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1885 | err = -ENOMEM; |
| 1886 | goto err_out; |
| 1887 | } |
| 1888 | |
| 1889 | for (i = 0; i < priv->num_channels; i++) { |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 1890 | spin_lock_init(&priv->chan[i].head_lock); |
| 1891 | spin_lock_init(&priv->chan[i].tail_lock); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1892 | } |
| 1893 | |
| 1894 | priv->fifo_len = roundup_pow_of_two(priv->chfifo_len); |
| 1895 | |
| 1896 | for (i = 0; i < priv->num_channels; i++) { |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 1897 | priv->chan[i].fifo = kzalloc(sizeof(struct talitos_request) * |
| 1898 | priv->fifo_len, GFP_KERNEL); |
| 1899 | if (!priv->chan[i].fifo) { |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1900 | dev_err(dev, "failed to allocate request fifo %d\n", i); |
| 1901 | err = -ENOMEM; |
| 1902 | goto err_out; |
| 1903 | } |
| 1904 | } |
| 1905 | |
Kim Phillips | ec6644d | 2008-07-17 20:16:40 +0800 | [diff] [blame] | 1906 | for (i = 0; i < priv->num_channels; i++) |
Kim Phillips | 4b99262 | 2009-08-13 11:50:38 +1000 | [diff] [blame] | 1907 | atomic_set(&priv->chan[i].submit_count, |
| 1908 | -(priv->chfifo_len - 1)); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1909 | |
Kim Phillips | 81eb024 | 2009-08-13 11:51:51 +1000 | [diff] [blame] | 1910 | dma_set_mask(dev, DMA_BIT_MASK(36)); |
| 1911 | |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1912 | /* reset and initialize the h/w */ |
| 1913 | err = init_device(dev); |
| 1914 | if (err) { |
| 1915 | dev_err(dev, "failed to initialize device\n"); |
| 1916 | goto err_out; |
| 1917 | } |
| 1918 | |
| 1919 | /* register the RNG, if available */ |
| 1920 | if (hw_supports(dev, DESC_HDR_SEL0_RNG)) { |
| 1921 | err = talitos_register_rng(dev); |
| 1922 | if (err) { |
| 1923 | dev_err(dev, "failed to register hwrng: %d\n", err); |
| 1924 | goto err_out; |
| 1925 | } else |
| 1926 | dev_info(dev, "hwrng\n"); |
| 1927 | } |
| 1928 | |
| 1929 | /* register crypto algorithms the device supports */ |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1930 | for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { |
| 1931 | if (hw_supports(dev, driver_algs[i].desc_hdr_template)) { |
| 1932 | struct talitos_crypto_alg *t_alg; |
| 1933 | |
| 1934 | t_alg = talitos_alg_alloc(dev, &driver_algs[i]); |
| 1935 | if (IS_ERR(t_alg)) { |
| 1936 | err = PTR_ERR(t_alg); |
| 1937 | goto err_out; |
| 1938 | } |
| 1939 | |
| 1940 | err = crypto_register_alg(&t_alg->crypto_alg); |
| 1941 | if (err) { |
| 1942 | dev_err(dev, "%s alg registration failed\n", |
| 1943 | t_alg->crypto_alg.cra_driver_name); |
| 1944 | kfree(t_alg); |
| 1945 | } else { |
| 1946 | list_add_tail(&t_alg->entry, &priv->alg_list); |
| 1947 | dev_info(dev, "%s\n", |
| 1948 | t_alg->crypto_alg.cra_driver_name); |
| 1949 | } |
| 1950 | } |
| 1951 | } |
| 1952 | |
| 1953 | return 0; |
| 1954 | |
| 1955 | err_out: |
| 1956 | talitos_remove(ofdev); |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1957 | |
| 1958 | return err; |
| 1959 | } |
| 1960 | |
| 1961 | static struct of_device_id talitos_match[] = { |
| 1962 | { |
| 1963 | .compatible = "fsl,sec2.0", |
| 1964 | }, |
| 1965 | {}, |
| 1966 | }; |
| 1967 | MODULE_DEVICE_TABLE(of, talitos_match); |
| 1968 | |
| 1969 | static struct of_platform_driver talitos_driver = { |
| 1970 | .name = "talitos", |
| 1971 | .match_table = talitos_match, |
| 1972 | .probe = talitos_probe, |
Al Viro | 596f103 | 2008-11-22 17:34:24 +0000 | [diff] [blame] | 1973 | .remove = talitos_remove, |
Kim Phillips | 9c4a796 | 2008-06-23 19:50:15 +0800 | [diff] [blame] | 1974 | }; |
| 1975 | |
| 1976 | static int __init talitos_init(void) |
| 1977 | { |
| 1978 | return of_register_platform_driver(&talitos_driver); |
| 1979 | } |
| 1980 | module_init(talitos_init); |
| 1981 | |
| 1982 | static void __exit talitos_exit(void) |
| 1983 | { |
| 1984 | of_unregister_platform_driver(&talitos_driver); |
| 1985 | } |
| 1986 | module_exit(talitos_exit); |
| 1987 | |
| 1988 | MODULE_LICENSE("GPL"); |
| 1989 | MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>"); |
| 1990 | MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver"); |