drivers/crypto/ccp/ccp-dev-v3.c

   1 /*
   2  * AMD Cryptographic Coprocessor (CCP) driver
   3  *
   4  * Copyright (C) 2013,2016 Advanced Micro Devices, Inc.
   5  *
   6  * Author: Tom Lendacky <thomas.lendacky@amd.com>
   7  * Author: Gary R Hook <gary.hook@amd.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/pci.h>
  17 #include <linux/kthread.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/ccp.h>
  20
  21 #include "ccp-dev.h"
  22
  23 static u32 ccp_alloc_ksb(struct ccp_cmd_queue *cmd_q, unsigned int count)
  24 {
  25         int start;
  26         struct ccp_device *ccp = cmd_q->ccp;
  27
  28         for (;;) {
  29                 mutex_lock(&ccp->sb_mutex);
  30
  31                 start = (u32)bitmap_find_next_zero_area(ccp->sb,
  32                                                         ccp->sb_count,
  33                                                         ccp->sb_start,
  34                                                         count, 0);
  35                 if (start <= ccp->sb_count) {
  36                         bitmap_set(ccp->sb, start, count);
  37
  38                         mutex_unlock(&ccp->sb_mutex);
  39                         break;
  40                 }
  41
  42                 ccp->sb_avail = 0;
  43
  44                 mutex_unlock(&ccp->sb_mutex);
  45
  46                 /* Wait for KSB entries to become available */
  47                 if (wait_event_interruptible(ccp->sb_queue, ccp->sb_avail))
  48                         return 0;
  49         }
  50
  51         return KSB_START + start;
  52 }
  53
  54 static void ccp_free_ksb(struct ccp_cmd_queue *cmd_q, unsigned int start,
  55                          unsigned int count)
  56 {
  57         struct ccp_device *ccp = cmd_q->ccp;
  58
  59         if (!start)
  60                 return;
  61
  62         mutex_lock(&ccp->sb_mutex);
  63
  64         bitmap_clear(ccp->sb, start - KSB_START, count);
  65
  66         ccp->sb_avail = 1;
  67
  68         mutex_unlock(&ccp->sb_mutex);
  69
  70         wake_up_interruptible_all(&ccp->sb_queue);
  71 }
  72
  73 static unsigned int ccp_get_free_slots(struct ccp_cmd_queue *cmd_q)
  74 {
  75         return CMD_Q_DEPTH(ioread32(cmd_q->reg_status));
  76 }
  77
  78 static int ccp_do_cmd(struct ccp_op *op, u32 *cr, unsigned int cr_count)
  79 {
  80         struct ccp_cmd_queue *cmd_q = op->cmd_q;
  81         struct ccp_device *ccp = cmd_q->ccp;
  82         void __iomem *cr_addr;
  83         u32 cr0, cmd;
  84         unsigned int i;
  85         int ret = 0;
  86
  87         /* We could read a status register to see how many free slots
  88          * are actually available, but reading that register resets it
  89          * and you could lose some error information.
  90          */
  91         cmd_q->free_slots--;
  92
  93         cr0 = (cmd_q->id << REQ0_CMD_Q_SHIFT)
  94               | (op->jobid << REQ0_JOBID_SHIFT)
  95               | REQ0_WAIT_FOR_WRITE;
  96
  97         if (op->soc)
  98                 cr0 |= REQ0_STOP_ON_COMPLETE
  99                        | REQ0_INT_ON_COMPLETE;
 100
 101         if (op->ioc || !cmd_q->free_slots)
 102                 cr0 |= REQ0_INT_ON_COMPLETE;
 103
 104         /* Start at CMD_REQ1 */
 105         cr_addr = ccp->io_regs + CMD_REQ0 + CMD_REQ_INCR;
 106
 107         mutex_lock(&ccp->req_mutex);
 108
 109         /* Write CMD_REQ1 through CMD_REQx first */
 110         for (i = 0; i < cr_count; i++, cr_addr += CMD_REQ_INCR)
 111                 iowrite32(*(cr + i), cr_addr);
 112
 113         /* Tell the CCP to start */
 114         wmb();
 115         iowrite32(cr0, ccp->io_regs + CMD_REQ0);
 116
 117         mutex_unlock(&ccp->req_mutex);
 118
 119         if (cr0 & REQ0_INT_ON_COMPLETE) {
 120                 /* Wait for the job to complete */
 121                 ret = wait_event_interruptible(cmd_q->int_queue,
 122                                                cmd_q->int_rcvd);
 123                 if (ret || cmd_q->cmd_error) {
 124                         /* On error delete all related jobs from the queue */
 125                         cmd = (cmd_q->id << DEL_Q_ID_SHIFT)
 126                               | op->jobid;
 127                         if (cmd_q->cmd_error)
 128                                 ccp_log_error(cmd_q->ccp,
 129                                               cmd_q->cmd_error);
 130
 131                         iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB);
 132
 133                         if (!ret)
 134                                 ret = -EIO;
 135                 } else if (op->soc) {
 136                         /* Delete just head job from the queue on SoC */
 137                         cmd = DEL_Q_ACTIVE
 138                               | (cmd_q->id << DEL_Q_ID_SHIFT)
 139                               | op->jobid;
 140
 141                         iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB);
 142                 }
 143
 144                 cmd_q->free_slots = CMD_Q_DEPTH(cmd_q->q_status);
 145
 146                 cmd_q->int_rcvd = 0;
 147         }
 148
 149         return ret;
 150 }
 151
 152 static int ccp_perform_aes(struct ccp_op *op)
 153 {
 154         u32 cr[6];
 155
 156         /* Fill out the register contents for REQ1 through REQ6 */
 157         cr[0] = (CCP_ENGINE_AES << REQ1_ENGINE_SHIFT)
 158                 | (op->u.aes.type << REQ1_AES_TYPE_SHIFT)
 159                 | (op->u.aes.mode << REQ1_AES_MODE_SHIFT)
 160                 | (op->u.aes.action << REQ1_AES_ACTION_SHIFT)
 161                 | (op->sb_key << REQ1_KEY_KSB_SHIFT);
 162         cr[1] = op->src.u.dma.length - 1;
 163         cr[2] = ccp_addr_lo(&op->src.u.dma);
 164         cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT)
 165                 | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT)
 166                 | ccp_addr_hi(&op->src.u.dma);
 167         cr[4] = ccp_addr_lo(&op->dst.u.dma);
 168         cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT)
 169                 | ccp_addr_hi(&op->dst.u.dma);
 170
 171         if (op->u.aes.mode == CCP_AES_MODE_CFB)
 172                 cr[0] |= ((0x7f) << REQ1_AES_CFB_SIZE_SHIFT);
 173
 174         if (op->eom)
 175                 cr[0] |= REQ1_EOM;
 176
 177         if (op->init)
 178                 cr[0] |= REQ1_INIT;
 179
 180         return ccp_do_cmd(op, cr, ARRAY_SIZE(cr));
 181 }
 182
 183 static int ccp_perform_xts_aes(struct ccp_op *op)
 184 {
 185         u32 cr[6];
 186
 187         /* Fill out the register contents for REQ1 through REQ6 */
 188         cr[0] = (CCP_ENGINE_XTS_AES_128 << REQ1_ENGINE_SHIFT)
 189                 | (op->u.xts.action << REQ1_AES_ACTION_SHIFT)
 190                 | (op->u.xts.unit_size << REQ1_XTS_AES_SIZE_SHIFT)
 191                 | (op->sb_key << REQ1_KEY_KSB_SHIFT);
 192         cr[1] = op->src.u.dma.length - 1;
 193         cr[2] = ccp_addr_lo(&op->src.u.dma);
 194         cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT)
 195                 | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT)
 196                 | ccp_addr_hi(&op->src.u.dma);
 197         cr[4] = ccp_addr_lo(&op->dst.u.dma);
 198         cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT)
 199                 | ccp_addr_hi(&op->dst.u.dma);
 200
 201         if (op->eom)
 202                 cr[0] |= REQ1_EOM;
 203
 204         if (op->init)
 205                 cr[0] |= REQ1_INIT;
 206
 207         return ccp_do_cmd(op, cr, ARRAY_SIZE(cr));
 208 }
 209
 210 static int ccp_perform_sha(struct ccp_op *op)
 211 {
 212         u32 cr[6];
 213
 214         /* Fill out the register contents for REQ1 through REQ6 */
 215         cr[0] = (CCP_ENGINE_SHA << REQ1_ENGINE_SHIFT)
 216                 | (op->u.sha.type << REQ1_SHA_TYPE_SHIFT)
 217                 | REQ1_INIT;
 218         cr[1] = op->src.u.dma.length - 1;
 219         cr[2] = ccp_addr_lo(&op->src.u.dma);
 220         cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT)
 221                 | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT)
 222                 | ccp_addr_hi(&op->src.u.dma);
 223
 224         if (op->eom) {
 225                 cr[0] |= REQ1_EOM;
 226                 cr[4] = lower_32_bits(op->u.sha.msg_bits);
 227                 cr[5] = upper_32_bits(op->u.sha.msg_bits);
 228         } else {
 229                 cr[4] = 0;
 230                 cr[5] = 0;
 231         }
 232
 233         return ccp_do_cmd(op, cr, ARRAY_SIZE(cr));
 234 }
 235
 236 static int ccp_perform_rsa(struct ccp_op *op)
 237 {
 238         u32 cr[6];
 239
 240         /* Fill out the register contents for REQ1 through REQ6 */
 241         cr[0] = (CCP_ENGINE_RSA << REQ1_ENGINE_SHIFT)
 242                 | (op->u.rsa.mod_size << REQ1_RSA_MOD_SIZE_SHIFT)
 243                 | (op->sb_key << REQ1_KEY_KSB_SHIFT)
 244                 | REQ1_EOM;
 245         cr[1] = op->u.rsa.input_len - 1;
 246         cr[2] = ccp_addr_lo(&op->src.u.dma);
 247         cr[3] = (op->sb_ctx << REQ4_KSB_SHIFT)
 248                 | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT)
 249                 | ccp_addr_hi(&op->src.u.dma);
 250         cr[4] = ccp_addr_lo(&op->dst.u.dma);
 251         cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT)
 252                 | ccp_addr_hi(&op->dst.u.dma);
 253
 254         return ccp_do_cmd(op, cr, ARRAY_SIZE(cr));
 255 }
 256
 257 static int ccp_perform_passthru(struct ccp_op *op)
 258 {
 259         u32 cr[6];
 260
 261         /* Fill out the register contents for REQ1 through REQ6 */
 262         cr[0] = (CCP_ENGINE_PASSTHRU << REQ1_ENGINE_SHIFT)
 263                 | (op->u.passthru.bit_mod << REQ1_PT_BW_SHIFT)
 264                 | (op->u.passthru.byte_swap << REQ1_PT_BS_SHIFT);
 265
 266         if (op->src.type == CCP_MEMTYPE_SYSTEM)
 267                 cr[1] = op->src.u.dma.length - 1;
 268         else
 269                 cr[1] = op->dst.u.dma.length - 1;
 270
 271         if (op->src.type == CCP_MEMTYPE_SYSTEM) {
 272                 cr[2] = ccp_addr_lo(&op->src.u.dma);
 273                 cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT)
 274                         | ccp_addr_hi(&op->src.u.dma);
 275
 276                 if (op->u.passthru.bit_mod != CCP_PASSTHRU_BITWISE_NOOP)
 277                         cr[3] |= (op->sb_key << REQ4_KSB_SHIFT);
 278         } else {
 279                 cr[2] = op->src.u.sb * CCP_SB_BYTES;
 280                 cr[3] = (CCP_MEMTYPE_SB << REQ4_MEMTYPE_SHIFT);
 281         }
 282
 283         if (op->dst.type == CCP_MEMTYPE_SYSTEM) {
 284                 cr[4] = ccp_addr_lo(&op->dst.u.dma);
 285                 cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT)
 286                         | ccp_addr_hi(&op->dst.u.dma);
 287         } else {
 288                 cr[4] = op->dst.u.sb * CCP_SB_BYTES;
 289                 cr[5] = (CCP_MEMTYPE_SB << REQ6_MEMTYPE_SHIFT);
 290         }
 291
 292         if (op->eom)
 293                 cr[0] |= REQ1_EOM;
 294
 295         return ccp_do_cmd(op, cr, ARRAY_SIZE(cr));
 296 }
 297
 298 static int ccp_perform_ecc(struct ccp_op *op)
 299 {
 300         u32 cr[6];
 301
 302         /* Fill out the register contents for REQ1 through REQ6 */
 303         cr[0] = REQ1_ECC_AFFINE_CONVERT
 304                 | (CCP_ENGINE_ECC << REQ1_ENGINE_SHIFT)
 305                 | (op->u.ecc.function << REQ1_ECC_FUNCTION_SHIFT)
 306                 | REQ1_EOM;
 307         cr[1] = op->src.u.dma.length - 1;
 308         cr[2] = ccp_addr_lo(&op->src.u.dma);
 309         cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT)
 310                 | ccp_addr_hi(&op->src.u.dma);
 311         cr[4] = ccp_addr_lo(&op->dst.u.dma);
 312         cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT)
 313                 | ccp_addr_hi(&op->dst.u.dma);
 314
 315         return ccp_do_cmd(op, cr, ARRAY_SIZE(cr));
 316 }
 317
 318 static void ccp_disable_queue_interrupts(struct ccp_device *ccp)
 319 {
 320         iowrite32(0x00, ccp->io_regs + IRQ_MASK_REG);
 321 }
 322
 323 static void ccp_enable_queue_interrupts(struct ccp_device *ccp)
 324 {
 325         iowrite32(ccp->qim, ccp->io_regs + IRQ_MASK_REG);
 326 }
 327
 328 static void ccp_irq_bh(unsigned long data)
 329 {
 330         struct ccp_device *ccp = (struct ccp_device *)data;
 331         struct ccp_cmd_queue *cmd_q;
 332         u32 q_int, status;
 333         unsigned int i;
 334
 335         status = ioread32(ccp->io_regs + IRQ_STATUS_REG);
 336
 337         for (i = 0; i < ccp->cmd_q_count; i++) {
 338                 cmd_q = &ccp->cmd_q[i];
 339
 340                 q_int = status & (cmd_q->int_ok | cmd_q->int_err);
 341                 if (q_int) {
 342                         cmd_q->int_status = status;
 343                         cmd_q->q_status = ioread32(cmd_q->reg_status);
 344                         cmd_q->q_int_status = ioread32(cmd_q->reg_int_status);
 345
 346                         /* On error, only save the first error value */
 347                         if ((q_int & cmd_q->int_err) && !cmd_q->cmd_error)
 348                                 cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status);
 349
 350                         cmd_q->int_rcvd = 1;
 351
 352                         /* Acknowledge the interrupt and wake the kthread */
 353                         iowrite32(q_int, ccp->io_regs + IRQ_STATUS_REG);
 354                         wake_up_interruptible(&cmd_q->int_queue);
 355                 }
 356         }
 357         ccp_enable_queue_interrupts(ccp);
 358 }
 359
 360 static irqreturn_t ccp_irq_handler(int irq, void *data)
 361 {
 362         struct device *dev = data;
 363         struct ccp_device *ccp = dev_get_drvdata(dev);
 364
 365         ccp_disable_queue_interrupts(ccp);
 366         if (ccp->use_tasklet)
 367                 tasklet_schedule(&ccp->irq_tasklet);
 368         else
 369                 ccp_irq_bh((unsigned long)ccp);
 370
 371         return IRQ_HANDLED;
 372 }
 373
 374 static int ccp_init(struct ccp_device *ccp)
 375 {
 376         struct device *dev = ccp->dev;
 377         struct ccp_cmd_queue *cmd_q;
 378         struct dma_pool *dma_pool;
 379         char dma_pool_name[MAX_DMAPOOL_NAME_LEN];
 380         unsigned int qmr, i;
 381         int ret;
 382
 383         /* Find available queues */
 384         ccp->qim = 0;
 385         qmr = ioread32(ccp->io_regs + Q_MASK_REG);
 386         for (i = 0; i < MAX_HW_QUEUES; i++) {
 387                 if (!(qmr & (1 << i)))
 388                         continue;
 389
 390                 /* Allocate a dma pool for this queue */
 391                 snprintf(dma_pool_name, sizeof(dma_pool_name), "%s_q%d",
 392                          ccp->name, i);
 393                 dma_pool = dma_pool_create(dma_pool_name, dev,
 394                                            CCP_DMAPOOL_MAX_SIZE,
 395                                            CCP_DMAPOOL_ALIGN, 0);
 396                 if (!dma_pool) {
 397                         dev_err(dev, "unable to allocate dma pool\n");
 398                         ret = -ENOMEM;
 399                         goto e_pool;
 400                 }
 401
 402                 cmd_q = &ccp->cmd_q[ccp->cmd_q_count];
 403                 ccp->cmd_q_count++;
 404
 405                 cmd_q->ccp = ccp;
 406                 cmd_q->id = i;
 407                 cmd_q->dma_pool = dma_pool;
 408
 409                 /* Reserve 2 KSB regions for the queue */
 410                 cmd_q->sb_key = KSB_START + ccp->sb_start++;
 411                 cmd_q->sb_ctx = KSB_START + ccp->sb_start++;
 412                 ccp->sb_count -= 2;
 413
 414                 /* Preset some register values and masks that are queue
 415                  * number dependent
 416                  */
 417                 cmd_q->reg_status = ccp->io_regs + CMD_Q_STATUS_BASE +
 418                                     (CMD_Q_STATUS_INCR * i);
 419                 cmd_q->reg_int_status = ccp->io_regs + CMD_Q_INT_STATUS_BASE +
 420                                         (CMD_Q_STATUS_INCR * i);
 421                 cmd_q->int_ok = 1 << (i * 2);
 422                 cmd_q->int_err = 1 << ((i * 2) + 1);
 423
 424                 cmd_q->free_slots = ccp_get_free_slots(cmd_q);
 425
 426                 init_waitqueue_head(&cmd_q->int_queue);
 427
 428                 /* Build queue interrupt mask (two interrupts per queue) */
 429                 ccp->qim |= cmd_q->int_ok | cmd_q->int_err;
 430
 431 #ifdef CONFIG_ARM64
 432                 /* For arm64 set the recommended queue cache settings */
 433                 iowrite32(ccp->axcache, ccp->io_regs + CMD_Q_CACHE_BASE +
 434                           (CMD_Q_CACHE_INC * i));
 435 #endif
 436
 437                 dev_dbg(dev, "queue #%u available\n", i);
 438         }
 439         if (ccp->cmd_q_count == 0) {
 440                 dev_notice(dev, "no command queues available\n");
 441                 ret = -EIO;
 442                 goto e_pool;
 443         }
 444         dev_notice(dev, "%u command queues available\n", ccp->cmd_q_count);
 445
 446         /* Disable and clear interrupts until ready */
 447         ccp_disable_queue_interrupts(ccp);
 448         for (i = 0; i < ccp->cmd_q_count; i++) {
 449                 cmd_q = &ccp->cmd_q[i];
 450
 451                 ioread32(cmd_q->reg_int_status);
 452                 ioread32(cmd_q->reg_status);
 453         }
 454         iowrite32(ccp->qim, ccp->io_regs + IRQ_STATUS_REG);
 455
 456         /* Request an irq */
 457         ret = ccp->get_irq(ccp);
 458         if (ret) {
 459                 dev_err(dev, "unable to allocate an IRQ\n");
 460                 goto e_pool;
 461         }
 462
 463         /* Initialize the ISR tasklet? */
 464         if (ccp->use_tasklet)
 465                 tasklet_init(&ccp->irq_tasklet, ccp_irq_bh,
 466                              (unsigned long)ccp);
 467
 468         dev_dbg(dev, "Starting threads...\n");
 469         /* Create a kthread for each queue */
 470         for (i = 0; i < ccp->cmd_q_count; i++) {
 471                 struct task_struct *kthread;
 472
 473                 cmd_q = &ccp->cmd_q[i];
 474
 475                 kthread = kthread_create(ccp_cmd_queue_thread, cmd_q,
 476                                          "%s-q%u", ccp->name, cmd_q->id);
 477                 if (IS_ERR(kthread)) {
 478                         dev_err(dev, "error creating queue thread (%ld)\n",
 479                                 PTR_ERR(kthread));
 480                         ret = PTR_ERR(kthread);
 481                         goto e_kthread;
 482                 }
 483
 484                 cmd_q->kthread = kthread;
 485                 wake_up_process(kthread);
 486         }
 487
 488         dev_dbg(dev, "Enabling interrupts...\n");
 489         /* Enable interrupts */
 490         ccp_enable_queue_interrupts(ccp);
 491
 492         dev_dbg(dev, "Registering device...\n");
 493         ccp_add_device(ccp);
 494
 495         ret = ccp_register_rng(ccp);
 496         if (ret)
 497                 goto e_kthread;
 498
 499         /* Register the DMA engine support */
 500         ret = ccp_dmaengine_register(ccp);
 501         if (ret)
 502                 goto e_hwrng;
 503
 504         return 0;
 505
 506 e_hwrng:
 507         ccp_unregister_rng(ccp);
 508
 509 e_kthread:
 510         for (i = 0; i < ccp->cmd_q_count; i++)
 511                 if (ccp->cmd_q[i].kthread)
 512                         kthread_stop(ccp->cmd_q[i].kthread);
 513
 514         ccp->free_irq(ccp);
 515
 516 e_pool:
 517         for (i = 0; i < ccp->cmd_q_count; i++)
 518                 dma_pool_destroy(ccp->cmd_q[i].dma_pool);
 519
 520         return ret;
 521 }
 522
 523 static void ccp_destroy(struct ccp_device *ccp)
 524 {
 525         struct ccp_cmd_queue *cmd_q;
 526         struct ccp_cmd *cmd;
 527         unsigned int i;
 528
 529         /* Unregister the DMA engine */
 530         ccp_dmaengine_unregister(ccp);
 531
 532         /* Unregister the RNG */
 533         ccp_unregister_rng(ccp);
 534
 535         /* Remove this device from the list of available units */
 536         ccp_del_device(ccp);
 537
 538         /* Disable and clear interrupts */
 539         ccp_disable_queue_interrupts(ccp);
 540         for (i = 0; i < ccp->cmd_q_count; i++) {
 541                 cmd_q = &ccp->cmd_q[i];
 542
 543                 ioread32(cmd_q->reg_int_status);
 544                 ioread32(cmd_q->reg_status);
 545         }
 546         iowrite32(ccp->qim, ccp->io_regs + IRQ_STATUS_REG);
 547
 548         /* Stop the queue kthreads */
 549         for (i = 0; i < ccp->cmd_q_count; i++)
 550                 if (ccp->cmd_q[i].kthread)
 551                         kthread_stop(ccp->cmd_q[i].kthread);
 552
 553         ccp->free_irq(ccp);
 554
 555         for (i = 0; i < ccp->cmd_q_count; i++)
 556                 dma_pool_destroy(ccp->cmd_q[i].dma_pool);
 557
 558         /* Flush the cmd and backlog queue */
 559         while (!list_empty(&ccp->cmd)) {
 560                 /* Invoke the callback directly with an error code */
 561                 cmd = list_first_entry(&ccp->cmd, struct ccp_cmd, entry);
 562                 list_del(&cmd->entry);
 563                 cmd->callback(cmd->data, -ENODEV);
 564         }
 565         while (!list_empty(&ccp->backlog)) {
 566                 /* Invoke the callback directly with an error code */
 567                 cmd = list_first_entry(&ccp->backlog, struct ccp_cmd, entry);
 568                 list_del(&cmd->entry);
 569                 cmd->callback(cmd->data, -ENODEV);
 570         }
 571 }
 572
 573 static const struct ccp_actions ccp3_actions = {
 574         .aes = ccp_perform_aes,
 575         .xts_aes = ccp_perform_xts_aes,
 576         .sha = ccp_perform_sha,
 577         .rsa = ccp_perform_rsa,
 578         .passthru = ccp_perform_passthru,
 579         .ecc = ccp_perform_ecc,
 580         .sballoc = ccp_alloc_ksb,
 581         .sbfree = ccp_free_ksb,
 582         .init = ccp_init,
 583         .destroy = ccp_destroy,
 584         .get_free_slots = ccp_get_free_slots,
 585         .irqhandler = ccp_irq_handler,
 586 };
 587
 588 const struct ccp_vdata ccpv3 = {
 589         .version = CCP_VERSION(3, 0),
 590         .setup = NULL,
 591         .perform = &ccp3_actions,
 592         .bar = 2,
 593         .offset = 0x20000,
 594 };