James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1 | /** |
| 2 | * AMCC SoC PPC4xx Crypto Driver |
| 3 | * |
| 4 | * Copyright (c) 2008 Applied Micro Circuits Corporation. |
| 5 | * All rights reserved. James Hsiao <jhsiao@amcc.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * This file implements AMCC crypto offload Linux device driver for use with |
| 18 | * Linux CryptoAPI. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/interrupt.h> |
| 23 | #include <linux/spinlock_types.h> |
| 24 | #include <linux/random.h> |
| 25 | #include <linux/scatterlist.h> |
| 26 | #include <linux/crypto.h> |
| 27 | #include <linux/dma-mapping.h> |
| 28 | #include <linux/platform_device.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/of_platform.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 32 | #include <asm/dcr.h> |
| 33 | #include <asm/dcr-regs.h> |
| 34 | #include <asm/cacheflush.h> |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 35 | #include <crypto/aes.h> |
| 36 | #include <crypto/sha.h> |
| 37 | #include "crypto4xx_reg_def.h" |
| 38 | #include "crypto4xx_core.h" |
| 39 | #include "crypto4xx_sa.h" |
| 40 | |
| 41 | #define PPC4XX_SEC_VERSION_STR "0.5" |
| 42 | |
| 43 | /** |
| 44 | * PPC4xx Crypto Engine Initialization Routine |
| 45 | */ |
| 46 | static void crypto4xx_hw_init(struct crypto4xx_device *dev) |
| 47 | { |
| 48 | union ce_ring_size ring_size; |
| 49 | union ce_ring_contol ring_ctrl; |
| 50 | union ce_part_ring_size part_ring_size; |
| 51 | union ce_io_threshold io_threshold; |
| 52 | u32 rand_num; |
| 53 | union ce_pe_dma_cfg pe_dma_cfg; |
| 54 | |
| 55 | writel(PPC4XX_BYTE_ORDER, dev->ce_base + CRYPTO4XX_BYTE_ORDER_CFG); |
| 56 | /* setup pe dma, include reset sg, pdr and pe, then release reset */ |
| 57 | pe_dma_cfg.w = 0; |
| 58 | pe_dma_cfg.bf.bo_sgpd_en = 1; |
| 59 | pe_dma_cfg.bf.bo_data_en = 0; |
| 60 | pe_dma_cfg.bf.bo_sa_en = 1; |
| 61 | pe_dma_cfg.bf.bo_pd_en = 1; |
| 62 | pe_dma_cfg.bf.dynamic_sa_en = 1; |
| 63 | pe_dma_cfg.bf.reset_sg = 1; |
| 64 | pe_dma_cfg.bf.reset_pdr = 1; |
| 65 | pe_dma_cfg.bf.reset_pe = 1; |
| 66 | writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG); |
| 67 | /* un reset pe,sg and pdr */ |
| 68 | pe_dma_cfg.bf.pe_mode = 0; |
| 69 | pe_dma_cfg.bf.reset_sg = 0; |
| 70 | pe_dma_cfg.bf.reset_pdr = 0; |
| 71 | pe_dma_cfg.bf.reset_pe = 0; |
| 72 | pe_dma_cfg.bf.bo_td_en = 0; |
| 73 | writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG); |
| 74 | writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_PDR_BASE); |
| 75 | writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_RDR_BASE); |
| 76 | writel(PPC4XX_PRNG_CTRL_AUTO_EN, dev->ce_base + CRYPTO4XX_PRNG_CTRL); |
| 77 | get_random_bytes(&rand_num, sizeof(rand_num)); |
| 78 | writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_L); |
| 79 | get_random_bytes(&rand_num, sizeof(rand_num)); |
| 80 | writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_H); |
| 81 | ring_size.w = 0; |
| 82 | ring_size.bf.ring_offset = PPC4XX_PD_SIZE; |
| 83 | ring_size.bf.ring_size = PPC4XX_NUM_PD; |
| 84 | writel(ring_size.w, dev->ce_base + CRYPTO4XX_RING_SIZE); |
| 85 | ring_ctrl.w = 0; |
| 86 | writel(ring_ctrl.w, dev->ce_base + CRYPTO4XX_RING_CTRL); |
| 87 | writel(PPC4XX_DC_3DES_EN, dev->ce_base + CRYPTO4XX_DEVICE_CTRL); |
| 88 | writel(dev->gdr_pa, dev->ce_base + CRYPTO4XX_GATH_RING_BASE); |
| 89 | writel(dev->sdr_pa, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE); |
| 90 | part_ring_size.w = 0; |
| 91 | part_ring_size.bf.sdr_size = PPC4XX_SDR_SIZE; |
| 92 | part_ring_size.bf.gdr_size = PPC4XX_GDR_SIZE; |
| 93 | writel(part_ring_size.w, dev->ce_base + CRYPTO4XX_PART_RING_SIZE); |
| 94 | writel(PPC4XX_SD_BUFFER_SIZE, dev->ce_base + CRYPTO4XX_PART_RING_CFG); |
| 95 | io_threshold.w = 0; |
| 96 | io_threshold.bf.output_threshold = PPC4XX_OUTPUT_THRESHOLD; |
| 97 | io_threshold.bf.input_threshold = PPC4XX_INPUT_THRESHOLD; |
| 98 | writel(io_threshold.w, dev->ce_base + CRYPTO4XX_IO_THRESHOLD); |
| 99 | writel(0, dev->ce_base + CRYPTO4XX_PDR_BASE_UADDR); |
| 100 | writel(0, dev->ce_base + CRYPTO4XX_RDR_BASE_UADDR); |
| 101 | writel(0, dev->ce_base + CRYPTO4XX_PKT_SRC_UADDR); |
| 102 | writel(0, dev->ce_base + CRYPTO4XX_PKT_DEST_UADDR); |
| 103 | writel(0, dev->ce_base + CRYPTO4XX_SA_UADDR); |
| 104 | writel(0, dev->ce_base + CRYPTO4XX_GATH_RING_BASE_UADDR); |
| 105 | writel(0, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE_UADDR); |
| 106 | /* un reset pe,sg and pdr */ |
| 107 | pe_dma_cfg.bf.pe_mode = 1; |
| 108 | pe_dma_cfg.bf.reset_sg = 0; |
| 109 | pe_dma_cfg.bf.reset_pdr = 0; |
| 110 | pe_dma_cfg.bf.reset_pe = 0; |
| 111 | pe_dma_cfg.bf.bo_td_en = 0; |
| 112 | writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG); |
| 113 | /*clear all pending interrupt*/ |
| 114 | writel(PPC4XX_INTERRUPT_CLR, dev->ce_base + CRYPTO4XX_INT_CLR); |
| 115 | writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT); |
| 116 | writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT); |
| 117 | writel(PPC4XX_INT_CFG, dev->ce_base + CRYPTO4XX_INT_CFG); |
| 118 | writel(PPC4XX_PD_DONE_INT, dev->ce_base + CRYPTO4XX_INT_EN); |
| 119 | } |
| 120 | |
| 121 | int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size) |
| 122 | { |
| 123 | ctx->sa_in = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4, |
| 124 | &ctx->sa_in_dma_addr, GFP_ATOMIC); |
| 125 | if (ctx->sa_in == NULL) |
| 126 | return -ENOMEM; |
| 127 | |
| 128 | ctx->sa_out = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4, |
| 129 | &ctx->sa_out_dma_addr, GFP_ATOMIC); |
| 130 | if (ctx->sa_out == NULL) { |
| 131 | dma_free_coherent(ctx->dev->core_dev->device, |
| 132 | ctx->sa_len * 4, |
| 133 | ctx->sa_in, ctx->sa_in_dma_addr); |
| 134 | return -ENOMEM; |
| 135 | } |
| 136 | |
| 137 | memset(ctx->sa_in, 0, size * 4); |
| 138 | memset(ctx->sa_out, 0, size * 4); |
| 139 | ctx->sa_len = size; |
| 140 | |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | void crypto4xx_free_sa(struct crypto4xx_ctx *ctx) |
| 145 | { |
| 146 | if (ctx->sa_in != NULL) |
| 147 | dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4, |
| 148 | ctx->sa_in, ctx->sa_in_dma_addr); |
| 149 | if (ctx->sa_out != NULL) |
| 150 | dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4, |
| 151 | ctx->sa_out, ctx->sa_out_dma_addr); |
| 152 | |
| 153 | ctx->sa_in_dma_addr = 0; |
| 154 | ctx->sa_out_dma_addr = 0; |
| 155 | ctx->sa_len = 0; |
| 156 | } |
| 157 | |
| 158 | u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx) |
| 159 | { |
| 160 | ctx->state_record = dma_alloc_coherent(ctx->dev->core_dev->device, |
| 161 | sizeof(struct sa_state_record), |
| 162 | &ctx->state_record_dma_addr, GFP_ATOMIC); |
| 163 | if (!ctx->state_record_dma_addr) |
| 164 | return -ENOMEM; |
| 165 | memset(ctx->state_record, 0, sizeof(struct sa_state_record)); |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | void crypto4xx_free_state_record(struct crypto4xx_ctx *ctx) |
| 171 | { |
| 172 | if (ctx->state_record != NULL) |
| 173 | dma_free_coherent(ctx->dev->core_dev->device, |
| 174 | sizeof(struct sa_state_record), |
| 175 | ctx->state_record, |
| 176 | ctx->state_record_dma_addr); |
| 177 | ctx->state_record_dma_addr = 0; |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * alloc memory for the gather ring |
| 182 | * no need to alloc buf for the ring |
| 183 | * gdr_tail, gdr_head and gdr_count are initialized by this function |
| 184 | */ |
| 185 | static u32 crypto4xx_build_pdr(struct crypto4xx_device *dev) |
| 186 | { |
| 187 | int i; |
| 188 | struct pd_uinfo *pd_uinfo; |
| 189 | dev->pdr = dma_alloc_coherent(dev->core_dev->device, |
| 190 | sizeof(struct ce_pd) * PPC4XX_NUM_PD, |
| 191 | &dev->pdr_pa, GFP_ATOMIC); |
| 192 | if (!dev->pdr) |
| 193 | return -ENOMEM; |
| 194 | |
| 195 | dev->pdr_uinfo = kzalloc(sizeof(struct pd_uinfo) * PPC4XX_NUM_PD, |
| 196 | GFP_KERNEL); |
| 197 | if (!dev->pdr_uinfo) { |
| 198 | dma_free_coherent(dev->core_dev->device, |
| 199 | sizeof(struct ce_pd) * PPC4XX_NUM_PD, |
| 200 | dev->pdr, |
| 201 | dev->pdr_pa); |
| 202 | return -ENOMEM; |
| 203 | } |
| 204 | memset(dev->pdr, 0, sizeof(struct ce_pd) * PPC4XX_NUM_PD); |
| 205 | dev->shadow_sa_pool = dma_alloc_coherent(dev->core_dev->device, |
| 206 | 256 * PPC4XX_NUM_PD, |
| 207 | &dev->shadow_sa_pool_pa, |
| 208 | GFP_ATOMIC); |
| 209 | if (!dev->shadow_sa_pool) |
| 210 | return -ENOMEM; |
| 211 | |
| 212 | dev->shadow_sr_pool = dma_alloc_coherent(dev->core_dev->device, |
| 213 | sizeof(struct sa_state_record) * PPC4XX_NUM_PD, |
| 214 | &dev->shadow_sr_pool_pa, GFP_ATOMIC); |
| 215 | if (!dev->shadow_sr_pool) |
| 216 | return -ENOMEM; |
| 217 | for (i = 0; i < PPC4XX_NUM_PD; i++) { |
| 218 | pd_uinfo = (struct pd_uinfo *) (dev->pdr_uinfo + |
| 219 | sizeof(struct pd_uinfo) * i); |
| 220 | |
| 221 | /* alloc 256 bytes which is enough for any kind of dynamic sa */ |
| 222 | pd_uinfo->sa_va = dev->shadow_sa_pool + 256 * i; |
| 223 | pd_uinfo->sa_pa = dev->shadow_sa_pool_pa + 256 * i; |
| 224 | |
| 225 | /* alloc state record */ |
| 226 | pd_uinfo->sr_va = dev->shadow_sr_pool + |
| 227 | sizeof(struct sa_state_record) * i; |
| 228 | pd_uinfo->sr_pa = dev->shadow_sr_pool_pa + |
| 229 | sizeof(struct sa_state_record) * i; |
| 230 | } |
| 231 | |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | static void crypto4xx_destroy_pdr(struct crypto4xx_device *dev) |
| 236 | { |
| 237 | if (dev->pdr != NULL) |
| 238 | dma_free_coherent(dev->core_dev->device, |
| 239 | sizeof(struct ce_pd) * PPC4XX_NUM_PD, |
| 240 | dev->pdr, dev->pdr_pa); |
| 241 | if (dev->shadow_sa_pool) |
| 242 | dma_free_coherent(dev->core_dev->device, 256 * PPC4XX_NUM_PD, |
| 243 | dev->shadow_sa_pool, dev->shadow_sa_pool_pa); |
| 244 | if (dev->shadow_sr_pool) |
| 245 | dma_free_coherent(dev->core_dev->device, |
| 246 | sizeof(struct sa_state_record) * PPC4XX_NUM_PD, |
| 247 | dev->shadow_sr_pool, dev->shadow_sr_pool_pa); |
| 248 | |
| 249 | kfree(dev->pdr_uinfo); |
| 250 | } |
| 251 | |
| 252 | static u32 crypto4xx_get_pd_from_pdr_nolock(struct crypto4xx_device *dev) |
| 253 | { |
| 254 | u32 retval; |
| 255 | u32 tmp; |
| 256 | |
| 257 | retval = dev->pdr_head; |
| 258 | tmp = (dev->pdr_head + 1) % PPC4XX_NUM_PD; |
| 259 | |
| 260 | if (tmp == dev->pdr_tail) |
| 261 | return ERING_WAS_FULL; |
| 262 | |
| 263 | dev->pdr_head = tmp; |
| 264 | |
| 265 | return retval; |
| 266 | } |
| 267 | |
| 268 | static u32 crypto4xx_put_pd_to_pdr(struct crypto4xx_device *dev, u32 idx) |
| 269 | { |
| 270 | struct pd_uinfo *pd_uinfo; |
| 271 | unsigned long flags; |
| 272 | |
| 273 | pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo + |
| 274 | sizeof(struct pd_uinfo) * idx); |
| 275 | spin_lock_irqsave(&dev->core_dev->lock, flags); |
| 276 | if (dev->pdr_tail != PPC4XX_LAST_PD) |
| 277 | dev->pdr_tail++; |
| 278 | else |
| 279 | dev->pdr_tail = 0; |
| 280 | pd_uinfo->state = PD_ENTRY_FREE; |
| 281 | spin_unlock_irqrestore(&dev->core_dev->lock, flags); |
| 282 | |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | static struct ce_pd *crypto4xx_get_pdp(struct crypto4xx_device *dev, |
| 287 | dma_addr_t *pd_dma, u32 idx) |
| 288 | { |
| 289 | *pd_dma = dev->pdr_pa + sizeof(struct ce_pd) * idx; |
| 290 | |
| 291 | return dev->pdr + sizeof(struct ce_pd) * idx; |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * alloc memory for the gather ring |
| 296 | * no need to alloc buf for the ring |
| 297 | * gdr_tail, gdr_head and gdr_count are initialized by this function |
| 298 | */ |
| 299 | static u32 crypto4xx_build_gdr(struct crypto4xx_device *dev) |
| 300 | { |
| 301 | dev->gdr = dma_alloc_coherent(dev->core_dev->device, |
| 302 | sizeof(struct ce_gd) * PPC4XX_NUM_GD, |
| 303 | &dev->gdr_pa, GFP_ATOMIC); |
| 304 | if (!dev->gdr) |
| 305 | return -ENOMEM; |
| 306 | |
| 307 | memset(dev->gdr, 0, sizeof(struct ce_gd) * PPC4XX_NUM_GD); |
| 308 | |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | static inline void crypto4xx_destroy_gdr(struct crypto4xx_device *dev) |
| 313 | { |
| 314 | dma_free_coherent(dev->core_dev->device, |
| 315 | sizeof(struct ce_gd) * PPC4XX_NUM_GD, |
| 316 | dev->gdr, dev->gdr_pa); |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * when this function is called. |
| 321 | * preemption or interrupt must be disabled |
| 322 | */ |
| 323 | u32 crypto4xx_get_n_gd(struct crypto4xx_device *dev, int n) |
| 324 | { |
| 325 | u32 retval; |
| 326 | u32 tmp; |
| 327 | if (n >= PPC4XX_NUM_GD) |
| 328 | return ERING_WAS_FULL; |
| 329 | |
| 330 | retval = dev->gdr_head; |
| 331 | tmp = (dev->gdr_head + n) % PPC4XX_NUM_GD; |
| 332 | if (dev->gdr_head > dev->gdr_tail) { |
| 333 | if (tmp < dev->gdr_head && tmp >= dev->gdr_tail) |
| 334 | return ERING_WAS_FULL; |
| 335 | } else if (dev->gdr_head < dev->gdr_tail) { |
| 336 | if (tmp < dev->gdr_head || tmp >= dev->gdr_tail) |
| 337 | return ERING_WAS_FULL; |
| 338 | } |
| 339 | dev->gdr_head = tmp; |
| 340 | |
| 341 | return retval; |
| 342 | } |
| 343 | |
| 344 | static u32 crypto4xx_put_gd_to_gdr(struct crypto4xx_device *dev) |
| 345 | { |
| 346 | unsigned long flags; |
| 347 | |
| 348 | spin_lock_irqsave(&dev->core_dev->lock, flags); |
| 349 | if (dev->gdr_tail == dev->gdr_head) { |
| 350 | spin_unlock_irqrestore(&dev->core_dev->lock, flags); |
| 351 | return 0; |
| 352 | } |
| 353 | |
| 354 | if (dev->gdr_tail != PPC4XX_LAST_GD) |
| 355 | dev->gdr_tail++; |
| 356 | else |
| 357 | dev->gdr_tail = 0; |
| 358 | |
| 359 | spin_unlock_irqrestore(&dev->core_dev->lock, flags); |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static inline struct ce_gd *crypto4xx_get_gdp(struct crypto4xx_device *dev, |
| 365 | dma_addr_t *gd_dma, u32 idx) |
| 366 | { |
| 367 | *gd_dma = dev->gdr_pa + sizeof(struct ce_gd) * idx; |
| 368 | |
| 369 | return (struct ce_gd *) (dev->gdr + sizeof(struct ce_gd) * idx); |
| 370 | } |
| 371 | |
| 372 | /** |
| 373 | * alloc memory for the scatter ring |
| 374 | * need to alloc buf for the ring |
| 375 | * sdr_tail, sdr_head and sdr_count are initialized by this function |
| 376 | */ |
| 377 | static u32 crypto4xx_build_sdr(struct crypto4xx_device *dev) |
| 378 | { |
| 379 | int i; |
| 380 | struct ce_sd *sd_array; |
| 381 | |
| 382 | /* alloc memory for scatter descriptor ring */ |
| 383 | dev->sdr = dma_alloc_coherent(dev->core_dev->device, |
| 384 | sizeof(struct ce_sd) * PPC4XX_NUM_SD, |
| 385 | &dev->sdr_pa, GFP_ATOMIC); |
| 386 | if (!dev->sdr) |
| 387 | return -ENOMEM; |
| 388 | |
| 389 | dev->scatter_buffer_size = PPC4XX_SD_BUFFER_SIZE; |
| 390 | dev->scatter_buffer_va = |
| 391 | dma_alloc_coherent(dev->core_dev->device, |
| 392 | dev->scatter_buffer_size * PPC4XX_NUM_SD, |
| 393 | &dev->scatter_buffer_pa, GFP_ATOMIC); |
| 394 | if (!dev->scatter_buffer_va) { |
| 395 | dma_free_coherent(dev->core_dev->device, |
| 396 | sizeof(struct ce_sd) * PPC4XX_NUM_SD, |
| 397 | dev->sdr, dev->sdr_pa); |
| 398 | return -ENOMEM; |
| 399 | } |
| 400 | |
| 401 | sd_array = dev->sdr; |
| 402 | |
| 403 | for (i = 0; i < PPC4XX_NUM_SD; i++) { |
| 404 | sd_array[i].ptr = dev->scatter_buffer_pa + |
| 405 | dev->scatter_buffer_size * i; |
| 406 | } |
| 407 | |
| 408 | return 0; |
| 409 | } |
| 410 | |
| 411 | static void crypto4xx_destroy_sdr(struct crypto4xx_device *dev) |
| 412 | { |
| 413 | if (dev->sdr != NULL) |
| 414 | dma_free_coherent(dev->core_dev->device, |
| 415 | sizeof(struct ce_sd) * PPC4XX_NUM_SD, |
| 416 | dev->sdr, dev->sdr_pa); |
| 417 | |
| 418 | if (dev->scatter_buffer_va != NULL) |
| 419 | dma_free_coherent(dev->core_dev->device, |
| 420 | dev->scatter_buffer_size * PPC4XX_NUM_SD, |
| 421 | dev->scatter_buffer_va, |
| 422 | dev->scatter_buffer_pa); |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * when this function is called. |
| 427 | * preemption or interrupt must be disabled |
| 428 | */ |
| 429 | static u32 crypto4xx_get_n_sd(struct crypto4xx_device *dev, int n) |
| 430 | { |
| 431 | u32 retval; |
| 432 | u32 tmp; |
| 433 | |
| 434 | if (n >= PPC4XX_NUM_SD) |
| 435 | return ERING_WAS_FULL; |
| 436 | |
| 437 | retval = dev->sdr_head; |
| 438 | tmp = (dev->sdr_head + n) % PPC4XX_NUM_SD; |
| 439 | if (dev->sdr_head > dev->gdr_tail) { |
| 440 | if (tmp < dev->sdr_head && tmp >= dev->sdr_tail) |
| 441 | return ERING_WAS_FULL; |
| 442 | } else if (dev->sdr_head < dev->sdr_tail) { |
| 443 | if (tmp < dev->sdr_head || tmp >= dev->sdr_tail) |
| 444 | return ERING_WAS_FULL; |
| 445 | } /* the head = tail, or empty case is already take cared */ |
| 446 | dev->sdr_head = tmp; |
| 447 | |
| 448 | return retval; |
| 449 | } |
| 450 | |
| 451 | static u32 crypto4xx_put_sd_to_sdr(struct crypto4xx_device *dev) |
| 452 | { |
| 453 | unsigned long flags; |
| 454 | |
| 455 | spin_lock_irqsave(&dev->core_dev->lock, flags); |
| 456 | if (dev->sdr_tail == dev->sdr_head) { |
| 457 | spin_unlock_irqrestore(&dev->core_dev->lock, flags); |
| 458 | return 0; |
| 459 | } |
| 460 | if (dev->sdr_tail != PPC4XX_LAST_SD) |
| 461 | dev->sdr_tail++; |
| 462 | else |
| 463 | dev->sdr_tail = 0; |
| 464 | spin_unlock_irqrestore(&dev->core_dev->lock, flags); |
| 465 | |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | static inline struct ce_sd *crypto4xx_get_sdp(struct crypto4xx_device *dev, |
| 470 | dma_addr_t *sd_dma, u32 idx) |
| 471 | { |
| 472 | *sd_dma = dev->sdr_pa + sizeof(struct ce_sd) * idx; |
| 473 | |
| 474 | return (struct ce_sd *)(dev->sdr + sizeof(struct ce_sd) * idx); |
| 475 | } |
| 476 | |
| 477 | static u32 crypto4xx_fill_one_page(struct crypto4xx_device *dev, |
| 478 | dma_addr_t *addr, u32 *length, |
| 479 | u32 *idx, u32 *offset, u32 *nbytes) |
| 480 | { |
| 481 | u32 len; |
| 482 | |
| 483 | if (*length > dev->scatter_buffer_size) { |
| 484 | memcpy(phys_to_virt(*addr), |
| 485 | dev->scatter_buffer_va + |
| 486 | *idx * dev->scatter_buffer_size + *offset, |
| 487 | dev->scatter_buffer_size); |
| 488 | *offset = 0; |
| 489 | *length -= dev->scatter_buffer_size; |
| 490 | *nbytes -= dev->scatter_buffer_size; |
| 491 | if (*idx == PPC4XX_LAST_SD) |
| 492 | *idx = 0; |
| 493 | else |
| 494 | (*idx)++; |
| 495 | *addr = *addr + dev->scatter_buffer_size; |
| 496 | return 1; |
| 497 | } else if (*length < dev->scatter_buffer_size) { |
| 498 | memcpy(phys_to_virt(*addr), |
| 499 | dev->scatter_buffer_va + |
| 500 | *idx * dev->scatter_buffer_size + *offset, *length); |
| 501 | if ((*offset + *length) == dev->scatter_buffer_size) { |
| 502 | if (*idx == PPC4XX_LAST_SD) |
| 503 | *idx = 0; |
| 504 | else |
| 505 | (*idx)++; |
| 506 | *nbytes -= *length; |
| 507 | *offset = 0; |
| 508 | } else { |
| 509 | *nbytes -= *length; |
| 510 | *offset += *length; |
| 511 | } |
| 512 | |
| 513 | return 0; |
| 514 | } else { |
| 515 | len = (*nbytes <= dev->scatter_buffer_size) ? |
| 516 | (*nbytes) : dev->scatter_buffer_size; |
| 517 | memcpy(phys_to_virt(*addr), |
| 518 | dev->scatter_buffer_va + |
| 519 | *idx * dev->scatter_buffer_size + *offset, |
| 520 | len); |
| 521 | *offset = 0; |
| 522 | *nbytes -= len; |
| 523 | |
| 524 | if (*idx == PPC4XX_LAST_SD) |
| 525 | *idx = 0; |
| 526 | else |
| 527 | (*idx)++; |
| 528 | |
| 529 | return 0; |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | static void crypto4xx_copy_pkt_to_dst(struct crypto4xx_device *dev, |
| 534 | struct ce_pd *pd, |
| 535 | struct pd_uinfo *pd_uinfo, |
| 536 | u32 nbytes, |
| 537 | struct scatterlist *dst) |
| 538 | { |
| 539 | dma_addr_t addr; |
| 540 | u32 this_sd; |
| 541 | u32 offset; |
| 542 | u32 len; |
| 543 | u32 i; |
| 544 | u32 sg_len; |
| 545 | struct scatterlist *sg; |
| 546 | |
| 547 | this_sd = pd_uinfo->first_sd; |
| 548 | offset = 0; |
| 549 | i = 0; |
| 550 | |
| 551 | while (nbytes) { |
| 552 | sg = &dst[i]; |
| 553 | sg_len = sg->length; |
| 554 | addr = dma_map_page(dev->core_dev->device, sg_page(sg), |
| 555 | sg->offset, sg->length, DMA_TO_DEVICE); |
| 556 | |
| 557 | if (offset == 0) { |
| 558 | len = (nbytes <= sg->length) ? nbytes : sg->length; |
| 559 | while (crypto4xx_fill_one_page(dev, &addr, &len, |
| 560 | &this_sd, &offset, &nbytes)) |
| 561 | ; |
| 562 | if (!nbytes) |
| 563 | return; |
| 564 | i++; |
| 565 | } else { |
| 566 | len = (nbytes <= (dev->scatter_buffer_size - offset)) ? |
| 567 | nbytes : (dev->scatter_buffer_size - offset); |
| 568 | len = (sg->length < len) ? sg->length : len; |
| 569 | while (crypto4xx_fill_one_page(dev, &addr, &len, |
| 570 | &this_sd, &offset, &nbytes)) |
| 571 | ; |
| 572 | if (!nbytes) |
| 573 | return; |
| 574 | sg_len -= len; |
| 575 | if (sg_len) { |
| 576 | addr += len; |
| 577 | while (crypto4xx_fill_one_page(dev, &addr, |
| 578 | &sg_len, &this_sd, &offset, &nbytes)) |
| 579 | ; |
| 580 | } |
| 581 | i++; |
| 582 | } |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | static u32 crypto4xx_copy_digest_to_dst(struct pd_uinfo *pd_uinfo, |
| 587 | struct crypto4xx_ctx *ctx) |
| 588 | { |
| 589 | struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *) ctx->sa_in; |
| 590 | struct sa_state_record *state_record = |
| 591 | (struct sa_state_record *) pd_uinfo->sr_va; |
| 592 | |
| 593 | if (sa->sa_command_0.bf.hash_alg == SA_HASH_ALG_SHA1) { |
| 594 | memcpy((void *) pd_uinfo->dest_va, state_record->save_digest, |
| 595 | SA_HASH_ALG_SHA1_DIGEST_SIZE); |
| 596 | } |
| 597 | |
| 598 | return 0; |
| 599 | } |
| 600 | |
| 601 | static void crypto4xx_ret_sg_desc(struct crypto4xx_device *dev, |
| 602 | struct pd_uinfo *pd_uinfo) |
| 603 | { |
| 604 | int i; |
| 605 | if (pd_uinfo->num_gd) { |
| 606 | for (i = 0; i < pd_uinfo->num_gd; i++) |
| 607 | crypto4xx_put_gd_to_gdr(dev); |
| 608 | pd_uinfo->first_gd = 0xffffffff; |
| 609 | pd_uinfo->num_gd = 0; |
| 610 | } |
| 611 | if (pd_uinfo->num_sd) { |
| 612 | for (i = 0; i < pd_uinfo->num_sd; i++) |
| 613 | crypto4xx_put_sd_to_sdr(dev); |
| 614 | |
| 615 | pd_uinfo->first_sd = 0xffffffff; |
| 616 | pd_uinfo->num_sd = 0; |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | static u32 crypto4xx_ablkcipher_done(struct crypto4xx_device *dev, |
| 621 | struct pd_uinfo *pd_uinfo, |
| 622 | struct ce_pd *pd) |
| 623 | { |
| 624 | struct crypto4xx_ctx *ctx; |
| 625 | struct ablkcipher_request *ablk_req; |
| 626 | struct scatterlist *dst; |
| 627 | dma_addr_t addr; |
| 628 | |
| 629 | ablk_req = ablkcipher_request_cast(pd_uinfo->async_req); |
| 630 | ctx = crypto_tfm_ctx(ablk_req->base.tfm); |
| 631 | |
| 632 | if (pd_uinfo->using_sd) { |
| 633 | crypto4xx_copy_pkt_to_dst(dev, pd, pd_uinfo, ablk_req->nbytes, |
| 634 | ablk_req->dst); |
| 635 | } else { |
| 636 | dst = pd_uinfo->dest_va; |
| 637 | addr = dma_map_page(dev->core_dev->device, sg_page(dst), |
| 638 | dst->offset, dst->length, DMA_FROM_DEVICE); |
| 639 | } |
| 640 | crypto4xx_ret_sg_desc(dev, pd_uinfo); |
| 641 | if (ablk_req->base.complete != NULL) |
| 642 | ablk_req->base.complete(&ablk_req->base, 0); |
| 643 | |
| 644 | return 0; |
| 645 | } |
| 646 | |
| 647 | static u32 crypto4xx_ahash_done(struct crypto4xx_device *dev, |
| 648 | struct pd_uinfo *pd_uinfo) |
| 649 | { |
| 650 | struct crypto4xx_ctx *ctx; |
| 651 | struct ahash_request *ahash_req; |
| 652 | |
| 653 | ahash_req = ahash_request_cast(pd_uinfo->async_req); |
| 654 | ctx = crypto_tfm_ctx(ahash_req->base.tfm); |
| 655 | |
| 656 | crypto4xx_copy_digest_to_dst(pd_uinfo, |
| 657 | crypto_tfm_ctx(ahash_req->base.tfm)); |
| 658 | crypto4xx_ret_sg_desc(dev, pd_uinfo); |
| 659 | /* call user provided callback function x */ |
| 660 | if (ahash_req->base.complete != NULL) |
| 661 | ahash_req->base.complete(&ahash_req->base, 0); |
| 662 | |
| 663 | return 0; |
| 664 | } |
| 665 | |
| 666 | static u32 crypto4xx_pd_done(struct crypto4xx_device *dev, u32 idx) |
| 667 | { |
| 668 | struct ce_pd *pd; |
| 669 | struct pd_uinfo *pd_uinfo; |
| 670 | |
| 671 | pd = dev->pdr + sizeof(struct ce_pd)*idx; |
| 672 | pd_uinfo = dev->pdr_uinfo + sizeof(struct pd_uinfo)*idx; |
| 673 | if (crypto_tfm_alg_type(pd_uinfo->async_req->tfm) == |
| 674 | CRYPTO_ALG_TYPE_ABLKCIPHER) |
| 675 | return crypto4xx_ablkcipher_done(dev, pd_uinfo, pd); |
| 676 | else |
| 677 | return crypto4xx_ahash_done(dev, pd_uinfo); |
| 678 | } |
| 679 | |
| 680 | /** |
| 681 | * Note: Only use this function to copy items that is word aligned. |
| 682 | */ |
| 683 | void crypto4xx_memcpy_le(unsigned int *dst, |
| 684 | const unsigned char *buf, |
| 685 | int len) |
| 686 | { |
| 687 | u8 *tmp; |
| 688 | for (; len >= 4; buf += 4, len -= 4) |
| 689 | *dst++ = cpu_to_le32(*(unsigned int *) buf); |
| 690 | |
| 691 | tmp = (u8 *)dst; |
| 692 | switch (len) { |
| 693 | case 3: |
| 694 | *tmp++ = 0; |
| 695 | *tmp++ = *(buf+2); |
| 696 | *tmp++ = *(buf+1); |
| 697 | *tmp++ = *buf; |
| 698 | break; |
| 699 | case 2: |
| 700 | *tmp++ = 0; |
| 701 | *tmp++ = 0; |
| 702 | *tmp++ = *(buf+1); |
| 703 | *tmp++ = *buf; |
| 704 | break; |
| 705 | case 1: |
| 706 | *tmp++ = 0; |
| 707 | *tmp++ = 0; |
| 708 | *tmp++ = 0; |
| 709 | *tmp++ = *buf; |
| 710 | break; |
| 711 | default: |
| 712 | break; |
| 713 | } |
| 714 | } |
| 715 | |
| 716 | static void crypto4xx_stop_all(struct crypto4xx_core_device *core_dev) |
| 717 | { |
| 718 | crypto4xx_destroy_pdr(core_dev->dev); |
| 719 | crypto4xx_destroy_gdr(core_dev->dev); |
| 720 | crypto4xx_destroy_sdr(core_dev->dev); |
| 721 | dev_set_drvdata(core_dev->device, NULL); |
| 722 | iounmap(core_dev->dev->ce_base); |
| 723 | kfree(core_dev->dev); |
| 724 | kfree(core_dev); |
| 725 | } |
| 726 | |
| 727 | void crypto4xx_return_pd(struct crypto4xx_device *dev, |
| 728 | u32 pd_entry, struct ce_pd *pd, |
| 729 | struct pd_uinfo *pd_uinfo) |
| 730 | { |
| 731 | /* irq should be already disabled */ |
| 732 | dev->pdr_head = pd_entry; |
| 733 | pd->pd_ctl.w = 0; |
| 734 | pd->pd_ctl_len.w = 0; |
| 735 | pd_uinfo->state = PD_ENTRY_FREE; |
| 736 | } |
| 737 | |
| 738 | /* |
| 739 | * derive number of elements in scatterlist |
| 740 | * Shamlessly copy from talitos.c |
| 741 | */ |
| 742 | static int get_sg_count(struct scatterlist *sg_list, int nbytes) |
| 743 | { |
| 744 | struct scatterlist *sg = sg_list; |
| 745 | int sg_nents = 0; |
| 746 | |
| 747 | while (nbytes) { |
| 748 | sg_nents++; |
| 749 | if (sg->length > nbytes) |
| 750 | break; |
| 751 | nbytes -= sg->length; |
| 752 | sg = sg_next(sg); |
| 753 | } |
| 754 | |
| 755 | return sg_nents; |
| 756 | } |
| 757 | |
| 758 | static u32 get_next_gd(u32 current) |
| 759 | { |
| 760 | if (current != PPC4XX_LAST_GD) |
| 761 | return current + 1; |
| 762 | else |
| 763 | return 0; |
| 764 | } |
| 765 | |
| 766 | static u32 get_next_sd(u32 current) |
| 767 | { |
| 768 | if (current != PPC4XX_LAST_SD) |
| 769 | return current + 1; |
| 770 | else |
| 771 | return 0; |
| 772 | } |
| 773 | |
| 774 | u32 crypto4xx_build_pd(struct crypto_async_request *req, |
| 775 | struct crypto4xx_ctx *ctx, |
| 776 | struct scatterlist *src, |
| 777 | struct scatterlist *dst, |
| 778 | unsigned int datalen, |
| 779 | void *iv, u32 iv_len) |
| 780 | { |
| 781 | struct crypto4xx_device *dev = ctx->dev; |
| 782 | dma_addr_t addr, pd_dma, sd_dma, gd_dma; |
| 783 | struct dynamic_sa_ctl *sa; |
| 784 | struct scatterlist *sg; |
| 785 | struct ce_gd *gd; |
| 786 | struct ce_pd *pd; |
| 787 | u32 num_gd, num_sd; |
| 788 | u32 fst_gd = 0xffffffff; |
| 789 | u32 fst_sd = 0xffffffff; |
| 790 | u32 pd_entry; |
| 791 | unsigned long flags; |
| 792 | struct pd_uinfo *pd_uinfo = NULL; |
| 793 | unsigned int nbytes = datalen, idx; |
| 794 | unsigned int ivlen = 0; |
| 795 | u32 gd_idx = 0; |
| 796 | |
| 797 | /* figure how many gd is needed */ |
| 798 | num_gd = get_sg_count(src, datalen); |
| 799 | if (num_gd == 1) |
| 800 | num_gd = 0; |
| 801 | |
| 802 | /* figure how many sd is needed */ |
| 803 | if (sg_is_last(dst) || ctx->is_hash) { |
| 804 | num_sd = 0; |
| 805 | } else { |
| 806 | if (datalen > PPC4XX_SD_BUFFER_SIZE) { |
| 807 | num_sd = datalen / PPC4XX_SD_BUFFER_SIZE; |
| 808 | if (datalen % PPC4XX_SD_BUFFER_SIZE) |
| 809 | num_sd++; |
| 810 | } else { |
| 811 | num_sd = 1; |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | /* |
| 816 | * The follow section of code needs to be protected |
| 817 | * The gather ring and scatter ring needs to be consecutive |
| 818 | * In case of run out of any kind of descriptor, the descriptor |
| 819 | * already got must be return the original place. |
| 820 | */ |
| 821 | spin_lock_irqsave(&dev->core_dev->lock, flags); |
| 822 | if (num_gd) { |
| 823 | fst_gd = crypto4xx_get_n_gd(dev, num_gd); |
| 824 | if (fst_gd == ERING_WAS_FULL) { |
| 825 | spin_unlock_irqrestore(&dev->core_dev->lock, flags); |
| 826 | return -EAGAIN; |
| 827 | } |
| 828 | } |
| 829 | if (num_sd) { |
| 830 | fst_sd = crypto4xx_get_n_sd(dev, num_sd); |
| 831 | if (fst_sd == ERING_WAS_FULL) { |
| 832 | if (num_gd) |
| 833 | dev->gdr_head = fst_gd; |
| 834 | spin_unlock_irqrestore(&dev->core_dev->lock, flags); |
| 835 | return -EAGAIN; |
| 836 | } |
| 837 | } |
| 838 | pd_entry = crypto4xx_get_pd_from_pdr_nolock(dev); |
| 839 | if (pd_entry == ERING_WAS_FULL) { |
| 840 | if (num_gd) |
| 841 | dev->gdr_head = fst_gd; |
| 842 | if (num_sd) |
| 843 | dev->sdr_head = fst_sd; |
| 844 | spin_unlock_irqrestore(&dev->core_dev->lock, flags); |
| 845 | return -EAGAIN; |
| 846 | } |
| 847 | spin_unlock_irqrestore(&dev->core_dev->lock, flags); |
| 848 | |
| 849 | pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo + |
| 850 | sizeof(struct pd_uinfo) * pd_entry); |
| 851 | pd = crypto4xx_get_pdp(dev, &pd_dma, pd_entry); |
| 852 | pd_uinfo->async_req = req; |
| 853 | pd_uinfo->num_gd = num_gd; |
| 854 | pd_uinfo->num_sd = num_sd; |
| 855 | |
| 856 | if (iv_len || ctx->is_hash) { |
| 857 | ivlen = iv_len; |
| 858 | pd->sa = pd_uinfo->sa_pa; |
| 859 | sa = (struct dynamic_sa_ctl *) pd_uinfo->sa_va; |
| 860 | if (ctx->direction == DIR_INBOUND) |
| 861 | memcpy(sa, ctx->sa_in, ctx->sa_len * 4); |
| 862 | else |
| 863 | memcpy(sa, ctx->sa_out, ctx->sa_len * 4); |
| 864 | |
| 865 | memcpy((void *) sa + ctx->offset_to_sr_ptr, |
| 866 | &pd_uinfo->sr_pa, 4); |
| 867 | |
| 868 | if (iv_len) |
| 869 | crypto4xx_memcpy_le(pd_uinfo->sr_va, iv, iv_len); |
| 870 | } else { |
| 871 | if (ctx->direction == DIR_INBOUND) { |
| 872 | pd->sa = ctx->sa_in_dma_addr; |
| 873 | sa = (struct dynamic_sa_ctl *) ctx->sa_in; |
| 874 | } else { |
| 875 | pd->sa = ctx->sa_out_dma_addr; |
| 876 | sa = (struct dynamic_sa_ctl *) ctx->sa_out; |
| 877 | } |
| 878 | } |
| 879 | pd->sa_len = ctx->sa_len; |
| 880 | if (num_gd) { |
| 881 | /* get first gd we are going to use */ |
| 882 | gd_idx = fst_gd; |
| 883 | pd_uinfo->first_gd = fst_gd; |
| 884 | pd_uinfo->num_gd = num_gd; |
| 885 | gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx); |
| 886 | pd->src = gd_dma; |
| 887 | /* enable gather */ |
| 888 | sa->sa_command_0.bf.gather = 1; |
| 889 | idx = 0; |
| 890 | src = &src[0]; |
| 891 | /* walk the sg, and setup gather array */ |
| 892 | while (nbytes) { |
| 893 | sg = &src[idx]; |
| 894 | addr = dma_map_page(dev->core_dev->device, sg_page(sg), |
| 895 | sg->offset, sg->length, DMA_TO_DEVICE); |
| 896 | gd->ptr = addr; |
| 897 | gd->ctl_len.len = sg->length; |
| 898 | gd->ctl_len.done = 0; |
| 899 | gd->ctl_len.ready = 1; |
| 900 | if (sg->length >= nbytes) |
| 901 | break; |
| 902 | nbytes -= sg->length; |
| 903 | gd_idx = get_next_gd(gd_idx); |
| 904 | gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx); |
| 905 | idx++; |
| 906 | } |
| 907 | } else { |
| 908 | pd->src = (u32)dma_map_page(dev->core_dev->device, sg_page(src), |
| 909 | src->offset, src->length, DMA_TO_DEVICE); |
| 910 | /* |
| 911 | * Disable gather in sa command |
| 912 | */ |
| 913 | sa->sa_command_0.bf.gather = 0; |
| 914 | /* |
| 915 | * Indicate gather array is not used |
| 916 | */ |
| 917 | pd_uinfo->first_gd = 0xffffffff; |
| 918 | pd_uinfo->num_gd = 0; |
| 919 | } |
| 920 | if (ctx->is_hash || sg_is_last(dst)) { |
| 921 | /* |
| 922 | * we know application give us dst a whole piece of memory |
| 923 | * no need to use scatter ring. |
| 924 | * In case of is_hash, the icv is always at end of src data. |
| 925 | */ |
| 926 | pd_uinfo->using_sd = 0; |
| 927 | pd_uinfo->first_sd = 0xffffffff; |
| 928 | pd_uinfo->num_sd = 0; |
| 929 | pd_uinfo->dest_va = dst; |
| 930 | sa->sa_command_0.bf.scatter = 0; |
| 931 | if (ctx->is_hash) |
| 932 | pd->dest = virt_to_phys((void *)dst); |
| 933 | else |
| 934 | pd->dest = (u32)dma_map_page(dev->core_dev->device, |
| 935 | sg_page(dst), dst->offset, |
| 936 | dst->length, DMA_TO_DEVICE); |
| 937 | } else { |
| 938 | struct ce_sd *sd = NULL; |
| 939 | u32 sd_idx = fst_sd; |
| 940 | nbytes = datalen; |
| 941 | sa->sa_command_0.bf.scatter = 1; |
| 942 | pd_uinfo->using_sd = 1; |
| 943 | pd_uinfo->dest_va = dst; |
| 944 | pd_uinfo->first_sd = fst_sd; |
| 945 | pd_uinfo->num_sd = num_sd; |
| 946 | sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx); |
| 947 | pd->dest = sd_dma; |
| 948 | /* setup scatter descriptor */ |
| 949 | sd->ctl.done = 0; |
| 950 | sd->ctl.rdy = 1; |
| 951 | /* sd->ptr should be setup by sd_init routine*/ |
| 952 | idx = 0; |
| 953 | if (nbytes >= PPC4XX_SD_BUFFER_SIZE) |
| 954 | nbytes -= PPC4XX_SD_BUFFER_SIZE; |
| 955 | else |
| 956 | nbytes = 0; |
| 957 | while (nbytes) { |
| 958 | sd_idx = get_next_sd(sd_idx); |
| 959 | sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx); |
| 960 | /* setup scatter descriptor */ |
| 961 | sd->ctl.done = 0; |
| 962 | sd->ctl.rdy = 1; |
| 963 | if (nbytes >= PPC4XX_SD_BUFFER_SIZE) |
| 964 | nbytes -= PPC4XX_SD_BUFFER_SIZE; |
| 965 | else |
| 966 | /* |
| 967 | * SD entry can hold PPC4XX_SD_BUFFER_SIZE, |
| 968 | * which is more than nbytes, so done. |
| 969 | */ |
| 970 | nbytes = 0; |
| 971 | } |
| 972 | } |
| 973 | |
| 974 | sa->sa_command_1.bf.hash_crypto_offset = 0; |
| 975 | pd->pd_ctl.w = ctx->pd_ctl; |
| 976 | pd->pd_ctl_len.w = 0x00400000 | (ctx->bypass << 24) | datalen; |
| 977 | pd_uinfo->state = PD_ENTRY_INUSE; |
| 978 | wmb(); |
| 979 | /* write any value to push engine to read a pd */ |
| 980 | writel(1, dev->ce_base + CRYPTO4XX_INT_DESCR_RD); |
| 981 | return -EINPROGRESS; |
| 982 | } |
| 983 | |
| 984 | /** |
| 985 | * Algorithm Registration Functions |
| 986 | */ |
| 987 | static int crypto4xx_alg_init(struct crypto_tfm *tfm) |
| 988 | { |
| 989 | struct crypto_alg *alg = tfm->__crt_alg; |
| 990 | struct crypto4xx_alg *amcc_alg = crypto_alg_to_crypto4xx_alg(alg); |
| 991 | struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); |
| 992 | |
| 993 | ctx->dev = amcc_alg->dev; |
| 994 | ctx->sa_in = NULL; |
| 995 | ctx->sa_out = NULL; |
| 996 | ctx->sa_in_dma_addr = 0; |
| 997 | ctx->sa_out_dma_addr = 0; |
| 998 | ctx->sa_len = 0; |
| 999 | |
Herbert Xu | 4dc10c0 | 2009-07-14 20:21:46 +0800 | [diff] [blame] | 1000 | switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) { |
| 1001 | default: |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1002 | tfm->crt_ablkcipher.reqsize = sizeof(struct crypto4xx_ctx); |
Herbert Xu | 4dc10c0 | 2009-07-14 20:21:46 +0800 | [diff] [blame] | 1003 | break; |
| 1004 | case CRYPTO_ALG_TYPE_AHASH: |
Herbert Xu | 6b1679f | 2009-07-12 23:08:28 +0800 | [diff] [blame] | 1005 | crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), |
| 1006 | sizeof(struct crypto4xx_ctx)); |
Herbert Xu | 4dc10c0 | 2009-07-14 20:21:46 +0800 | [diff] [blame] | 1007 | break; |
| 1008 | } |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1009 | |
| 1010 | return 0; |
| 1011 | } |
| 1012 | |
| 1013 | static void crypto4xx_alg_exit(struct crypto_tfm *tfm) |
| 1014 | { |
| 1015 | struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); |
| 1016 | |
| 1017 | crypto4xx_free_sa(ctx); |
| 1018 | crypto4xx_free_state_record(ctx); |
| 1019 | } |
| 1020 | |
| 1021 | int crypto4xx_register_alg(struct crypto4xx_device *sec_dev, |
Herbert Xu | 4dc10c0 | 2009-07-14 20:21:46 +0800 | [diff] [blame] | 1022 | struct crypto4xx_alg_common *crypto_alg, |
| 1023 | int array_size) |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1024 | { |
| 1025 | struct crypto4xx_alg *alg; |
| 1026 | int i; |
| 1027 | int rc = 0; |
| 1028 | |
| 1029 | for (i = 0; i < array_size; i++) { |
| 1030 | alg = kzalloc(sizeof(struct crypto4xx_alg), GFP_KERNEL); |
| 1031 | if (!alg) |
| 1032 | return -ENOMEM; |
| 1033 | |
| 1034 | alg->alg = crypto_alg[i]; |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1035 | alg->dev = sec_dev; |
Herbert Xu | 4dc10c0 | 2009-07-14 20:21:46 +0800 | [diff] [blame] | 1036 | |
| 1037 | switch (alg->alg.type) { |
| 1038 | case CRYPTO_ALG_TYPE_AHASH: |
| 1039 | rc = crypto_register_ahash(&alg->alg.u.hash); |
| 1040 | break; |
| 1041 | |
| 1042 | default: |
| 1043 | rc = crypto_register_alg(&alg->alg.u.cipher); |
| 1044 | break; |
| 1045 | } |
| 1046 | |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1047 | if (rc) { |
| 1048 | list_del(&alg->entry); |
| 1049 | kfree(alg); |
| 1050 | } else { |
| 1051 | list_add_tail(&alg->entry, &sec_dev->alg_list); |
| 1052 | } |
| 1053 | } |
| 1054 | |
| 1055 | return 0; |
| 1056 | } |
| 1057 | |
| 1058 | static void crypto4xx_unregister_alg(struct crypto4xx_device *sec_dev) |
| 1059 | { |
| 1060 | struct crypto4xx_alg *alg, *tmp; |
| 1061 | |
| 1062 | list_for_each_entry_safe(alg, tmp, &sec_dev->alg_list, entry) { |
| 1063 | list_del(&alg->entry); |
Herbert Xu | 4dc10c0 | 2009-07-14 20:21:46 +0800 | [diff] [blame] | 1064 | switch (alg->alg.type) { |
| 1065 | case CRYPTO_ALG_TYPE_AHASH: |
| 1066 | crypto_unregister_ahash(&alg->alg.u.hash); |
| 1067 | break; |
| 1068 | |
| 1069 | default: |
| 1070 | crypto_unregister_alg(&alg->alg.u.cipher); |
| 1071 | } |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1072 | kfree(alg); |
| 1073 | } |
| 1074 | } |
| 1075 | |
| 1076 | static void crypto4xx_bh_tasklet_cb(unsigned long data) |
| 1077 | { |
| 1078 | struct device *dev = (struct device *)data; |
| 1079 | struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev); |
| 1080 | struct pd_uinfo *pd_uinfo; |
| 1081 | struct ce_pd *pd; |
| 1082 | u32 tail; |
| 1083 | |
| 1084 | while (core_dev->dev->pdr_head != core_dev->dev->pdr_tail) { |
| 1085 | tail = core_dev->dev->pdr_tail; |
| 1086 | pd_uinfo = core_dev->dev->pdr_uinfo + |
| 1087 | sizeof(struct pd_uinfo)*tail; |
| 1088 | pd = core_dev->dev->pdr + sizeof(struct ce_pd) * tail; |
| 1089 | if ((pd_uinfo->state == PD_ENTRY_INUSE) && |
| 1090 | pd->pd_ctl.bf.pe_done && |
| 1091 | !pd->pd_ctl.bf.host_ready) { |
| 1092 | pd->pd_ctl.bf.pe_done = 0; |
| 1093 | crypto4xx_pd_done(core_dev->dev, tail); |
| 1094 | crypto4xx_put_pd_to_pdr(core_dev->dev, tail); |
| 1095 | pd_uinfo->state = PD_ENTRY_FREE; |
| 1096 | } else { |
| 1097 | /* if tail not done, break */ |
| 1098 | break; |
| 1099 | } |
| 1100 | } |
| 1101 | } |
| 1102 | |
| 1103 | /** |
| 1104 | * Top Half of isr. |
| 1105 | */ |
| 1106 | static irqreturn_t crypto4xx_ce_interrupt_handler(int irq, void *data) |
| 1107 | { |
| 1108 | struct device *dev = (struct device *)data; |
| 1109 | struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev); |
| 1110 | |
| 1111 | if (core_dev->dev->ce_base == 0) |
| 1112 | return 0; |
| 1113 | |
| 1114 | writel(PPC4XX_INTERRUPT_CLR, |
| 1115 | core_dev->dev->ce_base + CRYPTO4XX_INT_CLR); |
| 1116 | tasklet_schedule(&core_dev->tasklet); |
| 1117 | |
| 1118 | return IRQ_HANDLED; |
| 1119 | } |
| 1120 | |
| 1121 | /** |
| 1122 | * Supported Crypto Algorithms |
| 1123 | */ |
Herbert Xu | 4dc10c0 | 2009-07-14 20:21:46 +0800 | [diff] [blame] | 1124 | struct crypto4xx_alg_common crypto4xx_alg[] = { |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1125 | /* Crypto AES modes */ |
Herbert Xu | 4dc10c0 | 2009-07-14 20:21:46 +0800 | [diff] [blame] | 1126 | { .type = CRYPTO_ALG_TYPE_ABLKCIPHER, .u.cipher = { |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1127 | .cra_name = "cbc(aes)", |
| 1128 | .cra_driver_name = "cbc-aes-ppc4xx", |
| 1129 | .cra_priority = CRYPTO4XX_CRYPTO_PRIORITY, |
| 1130 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 1131 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1132 | .cra_ctxsize = sizeof(struct crypto4xx_ctx), |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1133 | .cra_type = &crypto_ablkcipher_type, |
Herbert Xu | 4dc10c0 | 2009-07-14 20:21:46 +0800 | [diff] [blame] | 1134 | .cra_init = crypto4xx_alg_init, |
| 1135 | .cra_exit = crypto4xx_alg_exit, |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1136 | .cra_module = THIS_MODULE, |
| 1137 | .cra_u = { |
| 1138 | .ablkcipher = { |
| 1139 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1140 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1141 | .ivsize = AES_IV_SIZE, |
| 1142 | .setkey = crypto4xx_setkey_aes_cbc, |
| 1143 | .encrypt = crypto4xx_encrypt, |
| 1144 | .decrypt = crypto4xx_decrypt, |
| 1145 | } |
| 1146 | } |
Herbert Xu | 4dc10c0 | 2009-07-14 20:21:46 +0800 | [diff] [blame] | 1147 | }}, |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1148 | }; |
| 1149 | |
| 1150 | /** |
| 1151 | * Module Initialization Routine |
| 1152 | */ |
Grant Likely | 2dc1158 | 2010-08-06 09:25:50 -0600 | [diff] [blame] | 1153 | static int __init crypto4xx_probe(struct platform_device *ofdev, |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1154 | const struct of_device_id *match) |
| 1155 | { |
| 1156 | int rc; |
| 1157 | struct resource res; |
| 1158 | struct device *dev = &ofdev->dev; |
| 1159 | struct crypto4xx_core_device *core_dev; |
| 1160 | |
Anatolij Gustschin | 7cea8cc | 2010-06-03 02:53:18 +0200 | [diff] [blame] | 1161 | rc = of_address_to_resource(ofdev->dev.of_node, 0, &res); |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1162 | if (rc) |
| 1163 | return -ENODEV; |
| 1164 | |
| 1165 | if (of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-crypto")) { |
| 1166 | mtdcri(SDR0, PPC460EX_SDR0_SRST, |
| 1167 | mfdcri(SDR0, PPC460EX_SDR0_SRST) | PPC460EX_CE_RESET); |
| 1168 | mtdcri(SDR0, PPC460EX_SDR0_SRST, |
| 1169 | mfdcri(SDR0, PPC460EX_SDR0_SRST) & ~PPC460EX_CE_RESET); |
| 1170 | } else if (of_find_compatible_node(NULL, NULL, |
| 1171 | "amcc,ppc405ex-crypto")) { |
| 1172 | mtdcri(SDR0, PPC405EX_SDR0_SRST, |
| 1173 | mfdcri(SDR0, PPC405EX_SDR0_SRST) | PPC405EX_CE_RESET); |
| 1174 | mtdcri(SDR0, PPC405EX_SDR0_SRST, |
| 1175 | mfdcri(SDR0, PPC405EX_SDR0_SRST) & ~PPC405EX_CE_RESET); |
| 1176 | } else if (of_find_compatible_node(NULL, NULL, |
| 1177 | "amcc,ppc460sx-crypto")) { |
| 1178 | mtdcri(SDR0, PPC460SX_SDR0_SRST, |
| 1179 | mfdcri(SDR0, PPC460SX_SDR0_SRST) | PPC460SX_CE_RESET); |
| 1180 | mtdcri(SDR0, PPC460SX_SDR0_SRST, |
| 1181 | mfdcri(SDR0, PPC460SX_SDR0_SRST) & ~PPC460SX_CE_RESET); |
| 1182 | } else { |
| 1183 | printk(KERN_ERR "Crypto Function Not supported!\n"); |
| 1184 | return -EINVAL; |
| 1185 | } |
| 1186 | |
| 1187 | core_dev = kzalloc(sizeof(struct crypto4xx_core_device), GFP_KERNEL); |
| 1188 | if (!core_dev) |
| 1189 | return -ENOMEM; |
| 1190 | |
| 1191 | dev_set_drvdata(dev, core_dev); |
| 1192 | core_dev->ofdev = ofdev; |
| 1193 | core_dev->dev = kzalloc(sizeof(struct crypto4xx_device), GFP_KERNEL); |
| 1194 | if (!core_dev->dev) |
| 1195 | goto err_alloc_dev; |
| 1196 | |
| 1197 | core_dev->dev->core_dev = core_dev; |
| 1198 | core_dev->device = dev; |
| 1199 | spin_lock_init(&core_dev->lock); |
| 1200 | INIT_LIST_HEAD(&core_dev->dev->alg_list); |
| 1201 | rc = crypto4xx_build_pdr(core_dev->dev); |
| 1202 | if (rc) |
| 1203 | goto err_build_pdr; |
| 1204 | |
| 1205 | rc = crypto4xx_build_gdr(core_dev->dev); |
| 1206 | if (rc) |
| 1207 | goto err_build_gdr; |
| 1208 | |
| 1209 | rc = crypto4xx_build_sdr(core_dev->dev); |
| 1210 | if (rc) |
| 1211 | goto err_build_sdr; |
| 1212 | |
| 1213 | /* Init tasklet for bottom half processing */ |
| 1214 | tasklet_init(&core_dev->tasklet, crypto4xx_bh_tasklet_cb, |
| 1215 | (unsigned long) dev); |
| 1216 | |
| 1217 | /* Register for Crypto isr, Crypto Engine IRQ */ |
Anatolij Gustschin | 7cea8cc | 2010-06-03 02:53:18 +0200 | [diff] [blame] | 1218 | core_dev->irq = irq_of_parse_and_map(ofdev->dev.of_node, 0); |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1219 | rc = request_irq(core_dev->irq, crypto4xx_ce_interrupt_handler, 0, |
| 1220 | core_dev->dev->name, dev); |
| 1221 | if (rc) |
| 1222 | goto err_request_irq; |
| 1223 | |
Anatolij Gustschin | 7cea8cc | 2010-06-03 02:53:18 +0200 | [diff] [blame] | 1224 | core_dev->dev->ce_base = of_iomap(ofdev->dev.of_node, 0); |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1225 | if (!core_dev->dev->ce_base) { |
| 1226 | dev_err(dev, "failed to of_iomap\n"); |
| 1227 | goto err_iomap; |
| 1228 | } |
| 1229 | |
| 1230 | /* need to setup pdr, rdr, gdr and sdr before this */ |
| 1231 | crypto4xx_hw_init(core_dev->dev); |
| 1232 | |
| 1233 | /* Register security algorithms with Linux CryptoAPI */ |
| 1234 | rc = crypto4xx_register_alg(core_dev->dev, crypto4xx_alg, |
| 1235 | ARRAY_SIZE(crypto4xx_alg)); |
| 1236 | if (rc) |
| 1237 | goto err_start_dev; |
| 1238 | |
| 1239 | return 0; |
| 1240 | |
| 1241 | err_start_dev: |
| 1242 | iounmap(core_dev->dev->ce_base); |
| 1243 | err_iomap: |
| 1244 | free_irq(core_dev->irq, dev); |
| 1245 | irq_dispose_mapping(core_dev->irq); |
| 1246 | tasklet_kill(&core_dev->tasklet); |
| 1247 | err_request_irq: |
| 1248 | crypto4xx_destroy_sdr(core_dev->dev); |
| 1249 | err_build_sdr: |
| 1250 | crypto4xx_destroy_gdr(core_dev->dev); |
| 1251 | err_build_gdr: |
| 1252 | crypto4xx_destroy_pdr(core_dev->dev); |
| 1253 | err_build_pdr: |
| 1254 | kfree(core_dev->dev); |
| 1255 | err_alloc_dev: |
| 1256 | kfree(core_dev); |
| 1257 | |
| 1258 | return rc; |
| 1259 | } |
| 1260 | |
Grant Likely | 2dc1158 | 2010-08-06 09:25:50 -0600 | [diff] [blame] | 1261 | static int __exit crypto4xx_remove(struct platform_device *ofdev) |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1262 | { |
| 1263 | struct device *dev = &ofdev->dev; |
| 1264 | struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev); |
| 1265 | |
| 1266 | free_irq(core_dev->irq, dev); |
| 1267 | irq_dispose_mapping(core_dev->irq); |
| 1268 | |
| 1269 | tasklet_kill(&core_dev->tasklet); |
| 1270 | /* Un-register with Linux CryptoAPI */ |
| 1271 | crypto4xx_unregister_alg(core_dev->dev); |
| 1272 | /* Free all allocated memory */ |
| 1273 | crypto4xx_stop_all(core_dev); |
| 1274 | |
| 1275 | return 0; |
| 1276 | } |
| 1277 | |
Márton Németh | 6c3f975 | 2010-01-17 21:54:01 +1100 | [diff] [blame] | 1278 | static const struct of_device_id crypto4xx_match[] = { |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1279 | { .compatible = "amcc,ppc4xx-crypto",}, |
| 1280 | { }, |
| 1281 | }; |
| 1282 | |
| 1283 | static struct of_platform_driver crypto4xx_driver = { |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 1284 | .driver = { |
| 1285 | .name = "crypto4xx", |
| 1286 | .owner = THIS_MODULE, |
| 1287 | .of_match_table = crypto4xx_match, |
| 1288 | }, |
James Hsiao | 049359d | 2009-02-05 16:18:13 +1100 | [diff] [blame] | 1289 | .probe = crypto4xx_probe, |
| 1290 | .remove = crypto4xx_remove, |
| 1291 | }; |
| 1292 | |
| 1293 | static int __init crypto4xx_init(void) |
| 1294 | { |
| 1295 | return of_register_platform_driver(&crypto4xx_driver); |
| 1296 | } |
| 1297 | |
| 1298 | static void __exit crypto4xx_exit(void) |
| 1299 | { |
| 1300 | of_unregister_platform_driver(&crypto4xx_driver); |
| 1301 | } |
| 1302 | |
| 1303 | module_init(crypto4xx_init); |
| 1304 | module_exit(crypto4xx_exit); |
| 1305 | |
| 1306 | MODULE_LICENSE("GPL"); |
| 1307 | MODULE_AUTHOR("James Hsiao <jhsiao@amcc.com>"); |
| 1308 | MODULE_DESCRIPTION("Driver for AMCC PPC4xx crypto accelerator"); |
| 1309 | |