drivers/crypto/cavium/cpt/cptvf_main.c

   1 /*
   2  * Copyright (C) 2016 Cavium, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of version 2 of the GNU General Public License
   6  * as published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/interrupt.h>
  10 #include <linux/module.h>
  11
  12 #include "cptvf.h"
  13
  14 #define DRV_NAME        "thunder-cptvf"
  15 #define DRV_VERSION     "1.0"
  16
  17 struct cptvf_wqe {
  18         struct tasklet_struct twork;
  19         void *cptvf;
  20         u32 qno;
  21 };
  22
  23 struct cptvf_wqe_info {
  24         struct cptvf_wqe vq_wqe[CPT_NUM_QS_PER_VF];
  25 };
  26
  27 static void vq_work_handler(unsigned long data)
  28 {
  29         struct cptvf_wqe_info *cwqe_info = (struct cptvf_wqe_info *)data;
  30         struct cptvf_wqe *cwqe = &cwqe_info->vq_wqe[0];
  31
  32         vq_post_process(cwqe->cptvf, cwqe->qno);
  33 }
  34
  35 static int init_worker_threads(struct cpt_vf *cptvf)
  36 {
  37         struct pci_dev *pdev = cptvf->pdev;
  38         struct cptvf_wqe_info *cwqe_info;
  39         int i;
  40
  41         cwqe_info = kzalloc(sizeof(*cwqe_info), GFP_KERNEL);
  42         if (!cwqe_info)
  43                 return -ENOMEM;
  44
  45         if (cptvf->nr_queues) {
  46                 dev_info(&pdev->dev, "Creating VQ worker threads (%d)\n",
  47                          cptvf->nr_queues);
  48         }
  49
  50         for (i = 0; i < cptvf->nr_queues; i++) {
  51                 tasklet_init(&cwqe_info->vq_wqe[i].twork, vq_work_handler,
  52                              (u64)cwqe_info);
  53                 cwqe_info->vq_wqe[i].qno = i;
  54                 cwqe_info->vq_wqe[i].cptvf = cptvf;
  55         }
  56
  57         cptvf->wqe_info = cwqe_info;
  58
  59         return 0;
  60 }
  61
  62 static void cleanup_worker_threads(struct cpt_vf *cptvf)
  63 {
  64         struct cptvf_wqe_info *cwqe_info;
  65         struct pci_dev *pdev = cptvf->pdev;
  66         int i;
  67
  68         cwqe_info = (struct cptvf_wqe_info *)cptvf->wqe_info;
  69         if (!cwqe_info)
  70                 return;
  71
  72         if (cptvf->nr_queues) {
  73                 dev_info(&pdev->dev, "Cleaning VQ worker threads (%u)\n",
  74                          cptvf->nr_queues);
  75         }
  76
  77         for (i = 0; i < cptvf->nr_queues; i++)
  78                 tasklet_kill(&cwqe_info->vq_wqe[i].twork);
  79
  80         kzfree(cwqe_info);
  81         cptvf->wqe_info = NULL;
  82 }
  83
  84 static void free_pending_queues(struct pending_qinfo *pqinfo)
  85 {
  86         int i;
  87         struct pending_queue *queue;
  88
  89         for_each_pending_queue(pqinfo, queue, i) {
  90                 if (!queue->head)
  91                         continue;
  92
  93                 /* free single queue */
  94                 kzfree((queue->head));
  95
  96                 queue->front = 0;
  97                 queue->rear = 0;
  98
  99                 return;
 100         }
 101
 102         pqinfo->qlen = 0;
 103         pqinfo->nr_queues = 0;
 104 }
 105
 106 static int alloc_pending_queues(struct pending_qinfo *pqinfo, u32 qlen,
 107                                 u32 nr_queues)
 108 {
 109         u32 i;
 110         size_t size;
 111         int ret;
 112         struct pending_queue *queue = NULL;
 113
 114         pqinfo->nr_queues = nr_queues;
 115         pqinfo->qlen = qlen;
 116
 117         size = (qlen * sizeof(struct pending_entry));
 118
 119         for_each_pending_queue(pqinfo, queue, i) {
 120                 queue->head = kzalloc((size), GFP_KERNEL);
 121                 if (!queue->head) {
 122                         ret = -ENOMEM;
 123                         goto pending_qfail;
 124                 }
 125
 126                 queue->front = 0;
 127                 queue->rear = 0;
 128                 atomic64_set((&queue->pending_count), (0));
 129
 130                 /* init queue spin lock */
 131                 spin_lock_init(&queue->lock);
 132         }
 133
 134         return 0;
 135
 136 pending_qfail:
 137         free_pending_queues(pqinfo);
 138
 139         return ret;
 140 }
 141
 142 static int init_pending_queues(struct cpt_vf *cptvf, u32 qlen, u32 nr_queues)
 143 {
 144         struct pci_dev *pdev = cptvf->pdev;
 145         int ret;
 146
 147         if (!nr_queues)
 148                 return 0;
 149
 150         ret = alloc_pending_queues(&cptvf->pqinfo, qlen, nr_queues);
 151         if (ret) {
 152                 dev_err(&pdev->dev, "failed to setup pending queues (%u)\n",
 153                         nr_queues);
 154                 return ret;
 155         }
 156
 157         return 0;
 158 }
 159
 160 static void cleanup_pending_queues(struct cpt_vf *cptvf)
 161 {
 162         struct pci_dev *pdev = cptvf->pdev;
 163
 164         if (!cptvf->nr_queues)
 165                 return;
 166
 167         dev_info(&pdev->dev, "Cleaning VQ pending queue (%u)\n",
 168                  cptvf->nr_queues);
 169         free_pending_queues(&cptvf->pqinfo);
 170 }
 171
 172 static void free_command_queues(struct cpt_vf *cptvf,
 173                                 struct command_qinfo *cqinfo)
 174 {
 175         int i;
 176         struct command_queue *queue = NULL;
 177         struct command_chunk *chunk = NULL;
 178         struct pci_dev *pdev = cptvf->pdev;
 179         struct hlist_node *node;
 180
 181         /* clean up for each queue */
 182         for (i = 0; i < cptvf->nr_queues; i++) {
 183                 queue = &cqinfo->queue[i];
 184                 if (hlist_empty(&cqinfo->queue[i].chead))
 185                         continue;
 186
 187                 hlist_for_each_entry_safe(chunk, node, &cqinfo->queue[i].chead,
 188                                           nextchunk) {
 189                         dma_free_coherent(&pdev->dev, chunk->size,
 190                                           chunk->head,
 191                                           chunk->dma_addr);
 192                         chunk->head = NULL;
 193                         chunk->dma_addr = 0;
 194                         hlist_del(&chunk->nextchunk);
 195                         kzfree(chunk);
 196                 }
 197
 198                 queue->nchunks = 0;
 199                 queue->idx = 0;
 200         }
 201
 202         /* common cleanup */
 203         cqinfo->cmd_size = 0;
 204 }
 205
 206 static int alloc_command_queues(struct cpt_vf *cptvf,
 207                                 struct command_qinfo *cqinfo, size_t cmd_size,
 208                                 u32 qlen)
 209 {
 210         int i;
 211         size_t q_size;
 212         struct command_queue *queue = NULL;
 213         struct pci_dev *pdev = cptvf->pdev;
 214
 215         /* common init */
 216         cqinfo->cmd_size = cmd_size;
 217         /* Qsize in dwords, needed for SADDR config, 1-next chunk pointer */
 218         cptvf->qsize = min(qlen, cqinfo->qchunksize) *
 219                         CPT_NEXT_CHUNK_PTR_SIZE + 1;
 220         /* Qsize in bytes to create space for alignment */
 221         q_size = qlen * cqinfo->cmd_size;
 222
 223         /* per queue initialization */
 224         for (i = 0; i < cptvf->nr_queues; i++) {
 225                 size_t c_size = 0;
 226                 size_t rem_q_size = q_size;
 227                 struct command_chunk *curr = NULL, *first = NULL, *last = NULL;
 228                 u32 qcsize_bytes = cqinfo->qchunksize * cqinfo->cmd_size;
 229
 230                 queue = &cqinfo->queue[i];
 231                 INIT_HLIST_HEAD(&cqinfo->queue[i].chead);
 232                 do {
 233                         curr = kzalloc(sizeof(*curr), GFP_KERNEL);
 234                         if (!curr)
 235                                 goto cmd_qfail;
 236
 237                         c_size = (rem_q_size > qcsize_bytes) ? qcsize_bytes :
 238                                         rem_q_size;
 239                         curr->head = (u8 *)dma_zalloc_coherent(&pdev->dev,
 240                                           c_size + CPT_NEXT_CHUNK_PTR_SIZE,
 241                                           &curr->dma_addr, GFP_KERNEL);
 242                         if (!curr->head) {
 243                                 dev_err(&pdev->dev, "Command Q (%d) chunk (%d) allocation failed\n",
 244                                         i, queue->nchunks);
 245                                 kfree(curr);
 246                                 goto cmd_qfail;
 247                         }
 248
 249                         curr->size = c_size;
 250                         if (queue->nchunks == 0) {
 251                                 hlist_add_head(&curr->nextchunk,
 252                                                &cqinfo->queue[i].chead);
 253                                 first = curr;
 254                         } else {
 255                                 hlist_add_behind(&curr->nextchunk,
 256                                                  &last->nextchunk);
 257                         }
 258
 259                         queue->nchunks++;
 260                         rem_q_size -= c_size;
 261                         if (last)
 262                                 *((u64 *)(&last->head[last->size])) = (u64)curr->dma_addr;
 263
 264                         last = curr;
 265                 } while (rem_q_size);
 266
 267                 /* Make the queue circular */
 268                 /* Tie back last chunk entry to head */
 269                 curr = first;
 270                 *((u64 *)(&last->head[last->size])) = (u64)curr->dma_addr;
 271                 queue->qhead = curr;
 272                 spin_lock_init(&queue->lock);
 273         }
 274         return 0;
 275
 276 cmd_qfail:
 277         free_command_queues(cptvf, cqinfo);
 278         return -ENOMEM;
 279 }
 280
 281 static int init_command_queues(struct cpt_vf *cptvf, u32 qlen)
 282 {
 283         struct pci_dev *pdev = cptvf->pdev;
 284         int ret;
 285
 286         /* setup AE command queues */
 287         ret = alloc_command_queues(cptvf, &cptvf->cqinfo, CPT_INST_SIZE,
 288                                    qlen);
 289         if (ret) {
 290                 dev_err(&pdev->dev, "failed to allocate AE command queues (%u)\n",
 291                         cptvf->nr_queues);
 292                 return ret;
 293         }
 294
 295         return ret;
 296 }
 297
 298 static void cleanup_command_queues(struct cpt_vf *cptvf)
 299 {
 300         struct pci_dev *pdev = cptvf->pdev;
 301
 302         if (!cptvf->nr_queues)
 303                 return;
 304
 305         dev_info(&pdev->dev, "Cleaning VQ command queue (%u)\n",
 306                  cptvf->nr_queues);
 307         free_command_queues(cptvf, &cptvf->cqinfo);
 308 }
 309
 310 static void cptvf_sw_cleanup(struct cpt_vf *cptvf)
 311 {
 312         cleanup_worker_threads(cptvf);
 313         cleanup_pending_queues(cptvf);
 314         cleanup_command_queues(cptvf);
 315 }
 316
 317 static int cptvf_sw_init(struct cpt_vf *cptvf, u32 qlen, u32 nr_queues)
 318 {
 319         struct pci_dev *pdev = cptvf->pdev;
 320         int ret = 0;
 321         u32 max_dev_queues = 0;
 322
 323         max_dev_queues = CPT_NUM_QS_PER_VF;
 324         /* possible cpus */
 325         nr_queues = min_t(u32, nr_queues, max_dev_queues);
 326         cptvf->nr_queues = nr_queues;
 327
 328         ret = init_command_queues(cptvf, qlen);
 329         if (ret) {
 330                 dev_err(&pdev->dev, "Failed to setup command queues (%u)\n",
 331                         nr_queues);
 332                 return ret;
 333         }
 334
 335         ret = init_pending_queues(cptvf, qlen, nr_queues);
 336         if (ret) {
 337                 dev_err(&pdev->dev, "Failed to setup pending queues (%u)\n",
 338                         nr_queues);
 339                 goto setup_pqfail;
 340         }
 341
 342         /* Create worker threads for BH processing */
 343         ret = init_worker_threads(cptvf);
 344         if (ret) {
 345                 dev_err(&pdev->dev, "Failed to setup worker threads\n");
 346                 goto init_work_fail;
 347         }
 348
 349         return 0;
 350
 351 init_work_fail:
 352         cleanup_worker_threads(cptvf);
 353         cleanup_pending_queues(cptvf);
 354
 355 setup_pqfail:
 356         cleanup_command_queues(cptvf);
 357
 358         return ret;
 359 }
 360
 361 static void cptvf_free_irq_affinity(struct cpt_vf *cptvf, int vec)
 362 {
 363         irq_set_affinity_hint(pci_irq_vector(cptvf->pdev, vec), NULL);
 364         free_cpumask_var(cptvf->affinity_mask[vec]);
 365 }
 366
 367 static void cptvf_write_vq_ctl(struct cpt_vf *cptvf, bool val)
 368 {
 369         union cptx_vqx_ctl vqx_ctl;
 370
 371         vqx_ctl.u = cpt_read_csr64(cptvf->reg_base, CPTX_VQX_CTL(0, 0));
 372         vqx_ctl.s.ena = val;
 373         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_CTL(0, 0), vqx_ctl.u);
 374 }
 375
 376 void cptvf_write_vq_doorbell(struct cpt_vf *cptvf, u32 val)
 377 {
 378         union cptx_vqx_doorbell vqx_dbell;
 379
 380         vqx_dbell.u = cpt_read_csr64(cptvf->reg_base,
 381                                      CPTX_VQX_DOORBELL(0, 0));
 382         vqx_dbell.s.dbell_cnt = val * 8; /* Num of Instructions * 8 words */
 383         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_DOORBELL(0, 0),
 384                         vqx_dbell.u);
 385 }
 386
 387 static void cptvf_write_vq_inprog(struct cpt_vf *cptvf, u8 val)
 388 {
 389         union cptx_vqx_inprog vqx_inprg;
 390
 391         vqx_inprg.u = cpt_read_csr64(cptvf->reg_base, CPTX_VQX_INPROG(0, 0));
 392         vqx_inprg.s.inflight = val;
 393         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_INPROG(0, 0), vqx_inprg.u);
 394 }
 395
 396 static void cptvf_write_vq_done_numwait(struct cpt_vf *cptvf, u32 val)
 397 {
 398         union cptx_vqx_done_wait vqx_dwait;
 399
 400         vqx_dwait.u = cpt_read_csr64(cptvf->reg_base,
 401                                      CPTX_VQX_DONE_WAIT(0, 0));
 402         vqx_dwait.s.num_wait = val;
 403         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_DONE_WAIT(0, 0),
 404                         vqx_dwait.u);
 405 }
 406
 407 static void cptvf_write_vq_done_timewait(struct cpt_vf *cptvf, u16 time)
 408 {
 409         union cptx_vqx_done_wait vqx_dwait;
 410
 411         vqx_dwait.u = cpt_read_csr64(cptvf->reg_base,
 412                                      CPTX_VQX_DONE_WAIT(0, 0));
 413         vqx_dwait.s.time_wait = time;
 414         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_DONE_WAIT(0, 0),
 415                         vqx_dwait.u);
 416 }
 417
 418 static void cptvf_enable_swerr_interrupts(struct cpt_vf *cptvf)
 419 {
 420         union cptx_vqx_misc_ena_w1s vqx_misc_ena;
 421
 422         vqx_misc_ena.u = cpt_read_csr64(cptvf->reg_base,
 423                                         CPTX_VQX_MISC_ENA_W1S(0, 0));
 424         /* Set mbox(0) interupts for the requested vf */
 425         vqx_misc_ena.s.swerr = 1;
 426         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_ENA_W1S(0, 0),
 427                         vqx_misc_ena.u);
 428 }
 429
 430 static void cptvf_enable_mbox_interrupts(struct cpt_vf *cptvf)
 431 {
 432         union cptx_vqx_misc_ena_w1s vqx_misc_ena;
 433
 434         vqx_misc_ena.u = cpt_read_csr64(cptvf->reg_base,
 435                                         CPTX_VQX_MISC_ENA_W1S(0, 0));
 436         /* Set mbox(0) interupts for the requested vf */
 437         vqx_misc_ena.s.mbox = 1;
 438         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_ENA_W1S(0, 0),
 439                         vqx_misc_ena.u);
 440 }
 441
 442 static void cptvf_enable_done_interrupts(struct cpt_vf *cptvf)
 443 {
 444         union cptx_vqx_done_ena_w1s vqx_done_ena;
 445
 446         vqx_done_ena.u = cpt_read_csr64(cptvf->reg_base,
 447                                         CPTX_VQX_DONE_ENA_W1S(0, 0));
 448         /* Set DONE interrupt for the requested vf */
 449         vqx_done_ena.s.done = 1;
 450         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_DONE_ENA_W1S(0, 0),
 451                         vqx_done_ena.u);
 452 }
 453
 454 static void cptvf_clear_dovf_intr(struct cpt_vf *cptvf)
 455 {
 456         union cptx_vqx_misc_int vqx_misc_int;
 457
 458         vqx_misc_int.u = cpt_read_csr64(cptvf->reg_base,
 459                                         CPTX_VQX_MISC_INT(0, 0));
 460         /* W1C for the VF */
 461         vqx_misc_int.s.dovf = 1;
 462         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_INT(0, 0),
 463                         vqx_misc_int.u);
 464 }
 465
 466 static void cptvf_clear_irde_intr(struct cpt_vf *cptvf)
 467 {
 468         union cptx_vqx_misc_int vqx_misc_int;
 469
 470         vqx_misc_int.u = cpt_read_csr64(cptvf->reg_base,
 471                                         CPTX_VQX_MISC_INT(0, 0));
 472         /* W1C for the VF */
 473         vqx_misc_int.s.irde = 1;
 474         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_INT(0, 0),
 475                         vqx_misc_int.u);
 476 }
 477
 478 static void cptvf_clear_nwrp_intr(struct cpt_vf *cptvf)
 479 {
 480         union cptx_vqx_misc_int vqx_misc_int;
 481
 482         vqx_misc_int.u = cpt_read_csr64(cptvf->reg_base,
 483                                         CPTX_VQX_MISC_INT(0, 0));
 484         /* W1C for the VF */
 485         vqx_misc_int.s.nwrp = 1;
 486         cpt_write_csr64(cptvf->reg_base,
 487                         CPTX_VQX_MISC_INT(0, 0), vqx_misc_int.u);
 488 }
 489
 490 static void cptvf_clear_mbox_intr(struct cpt_vf *cptvf)
 491 {
 492         union cptx_vqx_misc_int vqx_misc_int;
 493
 494         vqx_misc_int.u = cpt_read_csr64(cptvf->reg_base,
 495                                         CPTX_VQX_MISC_INT(0, 0));
 496         /* W1C for the VF */
 497         vqx_misc_int.s.mbox = 1;
 498         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_INT(0, 0),
 499                         vqx_misc_int.u);
 500 }
 501
 502 static void cptvf_clear_swerr_intr(struct cpt_vf *cptvf)
 503 {
 504         union cptx_vqx_misc_int vqx_misc_int;
 505
 506         vqx_misc_int.u = cpt_read_csr64(cptvf->reg_base,
 507                                         CPTX_VQX_MISC_INT(0, 0));
 508         /* W1C for the VF */
 509         vqx_misc_int.s.swerr = 1;
 510         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_INT(0, 0),
 511                         vqx_misc_int.u);
 512 }
 513
 514 static u64 cptvf_read_vf_misc_intr_status(struct cpt_vf *cptvf)
 515 {
 516         return cpt_read_csr64(cptvf->reg_base, CPTX_VQX_MISC_INT(0, 0));
 517 }
 518
 519 static irqreturn_t cptvf_misc_intr_handler(int irq, void *cptvf_irq)
 520 {
 521         struct cpt_vf *cptvf = (struct cpt_vf *)cptvf_irq;
 522         struct pci_dev *pdev = cptvf->pdev;
 523         u64 intr;
 524
 525         intr = cptvf_read_vf_misc_intr_status(cptvf);
 526         /*Check for MISC interrupt types*/
 527         if (likely(intr & CPT_VF_INTR_MBOX_MASK)) {
 528                 dev_dbg(&pdev->dev, "Mailbox interrupt 0x%llx on CPT VF %d\n",
 529                         intr, cptvf->vfid);
 530                 cptvf_handle_mbox_intr(cptvf);
 531                 cptvf_clear_mbox_intr(cptvf);
 532         } else if (unlikely(intr & CPT_VF_INTR_DOVF_MASK)) {
 533                 cptvf_clear_dovf_intr(cptvf);
 534                 /*Clear doorbell count*/
 535                 cptvf_write_vq_doorbell(cptvf, 0);
 536                 dev_err(&pdev->dev, "Doorbell overflow error interrupt 0x%llx on CPT VF %d\n",
 537                         intr, cptvf->vfid);
 538         } else if (unlikely(intr & CPT_VF_INTR_IRDE_MASK)) {
 539                 cptvf_clear_irde_intr(cptvf);
 540                 dev_err(&pdev->dev, "Instruction NCB read error interrupt 0x%llx on CPT VF %d\n",
 541                         intr, cptvf->vfid);
 542         } else if (unlikely(intr & CPT_VF_INTR_NWRP_MASK)) {
 543                 cptvf_clear_nwrp_intr(cptvf);
 544                 dev_err(&pdev->dev, "NCB response write error interrupt 0x%llx on CPT VF %d\n",
 545                         intr, cptvf->vfid);
 546         } else if (unlikely(intr & CPT_VF_INTR_SERR_MASK)) {
 547                 cptvf_clear_swerr_intr(cptvf);
 548                 dev_err(&pdev->dev, "Software error interrupt 0x%llx on CPT VF %d\n",
 549                         intr, cptvf->vfid);
 550         } else {
 551                 dev_err(&pdev->dev, "Unhandled interrupt in CPT VF %d\n",
 552                         cptvf->vfid);
 553         }
 554
 555         return IRQ_HANDLED;
 556 }
 557
 558 static inline struct cptvf_wqe *get_cptvf_vq_wqe(struct cpt_vf *cptvf,
 559                                                  int qno)
 560 {
 561         struct cptvf_wqe_info *nwqe_info;
 562
 563         if (unlikely(qno >= cptvf->nr_queues))
 564                 return NULL;
 565         nwqe_info = (struct cptvf_wqe_info *)cptvf->wqe_info;
 566
 567         return &nwqe_info->vq_wqe[qno];
 568 }
 569
 570 static inline u32 cptvf_read_vq_done_count(struct cpt_vf *cptvf)
 571 {
 572         union cptx_vqx_done vqx_done;
 573
 574         vqx_done.u = cpt_read_csr64(cptvf->reg_base, CPTX_VQX_DONE(0, 0));
 575         return vqx_done.s.done;
 576 }
 577
 578 static inline void cptvf_write_vq_done_ack(struct cpt_vf *cptvf,
 579                                            u32 ackcnt)
 580 {
 581         union cptx_vqx_done_ack vqx_dack_cnt;
 582
 583         vqx_dack_cnt.u = cpt_read_csr64(cptvf->reg_base,
 584                                         CPTX_VQX_DONE_ACK(0, 0));
 585         vqx_dack_cnt.s.done_ack = ackcnt;
 586         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_DONE_ACK(0, 0),
 587                         vqx_dack_cnt.u);
 588 }
 589
 590 static irqreturn_t cptvf_done_intr_handler(int irq, void *cptvf_irq)
 591 {
 592         struct cpt_vf *cptvf = (struct cpt_vf *)cptvf_irq;
 593         struct pci_dev *pdev = cptvf->pdev;
 594         /* Read the number of completions */
 595         u32 intr = cptvf_read_vq_done_count(cptvf);
 596
 597         if (intr) {
 598                 struct cptvf_wqe *wqe;
 599
 600                 /* Acknowledge the number of
 601                  * scheduled completions for processing
 602                  */
 603                 cptvf_write_vq_done_ack(cptvf, intr);
 604                 wqe = get_cptvf_vq_wqe(cptvf, 0);
 605                 if (unlikely(!wqe)) {
 606                         dev_err(&pdev->dev, "No work to schedule for VF (%d)",
 607                                 cptvf->vfid);
 608                         return IRQ_NONE;
 609                 }
 610                 tasklet_hi_schedule(&wqe->twork);
 611         }
 612
 613         return IRQ_HANDLED;
 614 }
 615
 616 static void cptvf_set_irq_affinity(struct cpt_vf *cptvf, int vec)
 617 {
 618         struct pci_dev *pdev = cptvf->pdev;
 619         int cpu;
 620
 621         if (!zalloc_cpumask_var(&cptvf->affinity_mask[vec],
 622                                 GFP_KERNEL)) {
 623                 dev_err(&pdev->dev, "Allocation failed for affinity_mask for VF %d",
 624                         cptvf->vfid);
 625                 return;
 626         }
 627
 628         cpu = cptvf->vfid % num_online_cpus();
 629         cpumask_set_cpu(cpumask_local_spread(cpu, cptvf->node),
 630                         cptvf->affinity_mask[vec]);
 631         irq_set_affinity_hint(pci_irq_vector(pdev, vec),
 632                         cptvf->affinity_mask[vec]);
 633 }
 634
 635 static void cptvf_write_vq_saddr(struct cpt_vf *cptvf, u64 val)
 636 {
 637         union cptx_vqx_saddr vqx_saddr;
 638
 639         vqx_saddr.u = val;
 640         cpt_write_csr64(cptvf->reg_base, CPTX_VQX_SADDR(0, 0), vqx_saddr.u);
 641 }
 642
 643 void cptvf_device_init(struct cpt_vf *cptvf)
 644 {
 645         u64 base_addr = 0;
 646
 647         /* Disable the VQ */
 648         cptvf_write_vq_ctl(cptvf, 0);
 649         /* Reset the doorbell */
 650         cptvf_write_vq_doorbell(cptvf, 0);
 651         /* Clear inflight */
 652         cptvf_write_vq_inprog(cptvf, 0);
 653         /* Write VQ SADDR */
 654         /* TODO: for now only one queue, so hard coded */
 655         base_addr = (u64)(cptvf->cqinfo.queue[0].qhead->dma_addr);
 656         cptvf_write_vq_saddr(cptvf, base_addr);
 657         /* Configure timerhold / coalescence */
 658         cptvf_write_vq_done_timewait(cptvf, CPT_TIMER_THOLD);
 659         cptvf_write_vq_done_numwait(cptvf, 1);
 660         /* Enable the VQ */
 661         cptvf_write_vq_ctl(cptvf, 1);
 662         /* Flag the VF ready */
 663         cptvf->flags |= CPT_FLAG_DEVICE_READY;
 664 }
 665
 666 static int cptvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 667 {
 668         struct device *dev = &pdev->dev;
 669         struct cpt_vf *cptvf;
 670         int    err;
 671
 672         cptvf = devm_kzalloc(dev, sizeof(*cptvf), GFP_KERNEL);
 673         if (!cptvf)
 674                 return -ENOMEM;
 675
 676         pci_set_drvdata(pdev, cptvf);
 677         cptvf->pdev = pdev;
 678         err = pci_enable_device(pdev);
 679         if (err) {
 680                 dev_err(dev, "Failed to enable PCI device\n");
 681                 pci_set_drvdata(pdev, NULL);
 682                 return err;
 683         }
 684
 685         err = pci_request_regions(pdev, DRV_NAME);
 686         if (err) {
 687                 dev_err(dev, "PCI request regions failed 0x%x\n", err);
 688                 goto cptvf_err_disable_device;
 689         }
 690         /* Mark as VF driver */
 691         cptvf->flags |= CPT_FLAG_VF_DRIVER;
 692         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(48));
 693         if (err) {
 694                 dev_err(dev, "Unable to get usable DMA configuration\n");
 695                 goto cptvf_err_release_regions;
 696         }
 697
 698         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(48));
 699         if (err) {
 700                 dev_err(dev, "Unable to get 48-bit DMA for consistent allocations\n");
 701                 goto cptvf_err_release_regions;
 702         }
 703
 704         /* MAP PF's configuration registers */
 705         cptvf->reg_base = pcim_iomap(pdev, 0, 0);
 706         if (!cptvf->reg_base) {
 707                 dev_err(dev, "Cannot map config register space, aborting\n");
 708                 err = -ENOMEM;
 709                 goto cptvf_err_release_regions;
 710         }
 711
 712         cptvf->node = dev_to_node(&pdev->dev);
 713         err = pci_alloc_irq_vectors(pdev, CPT_VF_MSIX_VECTORS,
 714                         CPT_VF_MSIX_VECTORS, PCI_IRQ_MSIX);
 715         if (err < 0) {
 716                 dev_err(dev, "Request for #%d msix vectors failed\n",
 717                         CPT_VF_MSIX_VECTORS);
 718                 goto cptvf_err_release_regions;
 719         }
 720
 721         err = request_irq(pci_irq_vector(pdev, CPT_VF_INT_VEC_E_MISC),
 722                           cptvf_misc_intr_handler, 0, "CPT VF misc intr",
 723                           cptvf);
 724         if (err) {
 725                 dev_err(dev, "Request misc irq failed");
 726                 goto cptvf_free_vectors;
 727         }
 728
 729         /* Enable mailbox interrupt */
 730         cptvf_enable_mbox_interrupts(cptvf);
 731         cptvf_enable_swerr_interrupts(cptvf);
 732
 733         /* Check ready with PF */
 734         /* Gets chip ID / device Id from PF if ready */
 735         err = cptvf_check_pf_ready(cptvf);
 736         if (err) {
 737                 dev_err(dev, "PF not responding to READY msg");
 738                 goto cptvf_free_misc_irq;
 739         }
 740
 741         /* CPT VF software resources initialization */
 742         cptvf->cqinfo.qchunksize = CPT_CMD_QCHUNK_SIZE;
 743         err = cptvf_sw_init(cptvf, CPT_CMD_QLEN, CPT_NUM_QS_PER_VF);
 744         if (err) {
 745                 dev_err(dev, "cptvf_sw_init() failed");
 746                 goto cptvf_free_misc_irq;
 747         }
 748         /* Convey VQ LEN to PF */
 749         err = cptvf_send_vq_size_msg(cptvf);
 750         if (err) {
 751                 dev_err(dev, "PF not responding to QLEN msg");
 752                 goto cptvf_free_misc_irq;
 753         }
 754
 755         /* CPT VF device initialization */
 756         cptvf_device_init(cptvf);
 757         /* Send msg to PF to assign currnet Q to required group */
 758         cptvf->vfgrp = 1;
 759         err = cptvf_send_vf_to_grp_msg(cptvf);
 760         if (err) {
 761                 dev_err(dev, "PF not responding to VF_GRP msg");
 762                 goto cptvf_free_misc_irq;
 763         }
 764
 765         cptvf->priority = 1;
 766         err = cptvf_send_vf_priority_msg(cptvf);
 767         if (err) {
 768                 dev_err(dev, "PF not responding to VF_PRIO msg");
 769                 goto cptvf_free_misc_irq;
 770         }
 771
 772         err = request_irq(pci_irq_vector(pdev, CPT_VF_INT_VEC_E_DONE),
 773                           cptvf_done_intr_handler, 0, "CPT VF done intr",
 774                           cptvf);
 775         if (err) {
 776                 dev_err(dev, "Request done irq failed\n");
 777                 goto cptvf_free_misc_irq;
 778         }
 779
 780         /* Enable mailbox interrupt */
 781         cptvf_enable_done_interrupts(cptvf);
 782
 783         /* Set irq affinity masks */
 784         cptvf_set_irq_affinity(cptvf, CPT_VF_INT_VEC_E_MISC);
 785         cptvf_set_irq_affinity(cptvf, CPT_VF_INT_VEC_E_DONE);
 786
 787         err = cptvf_send_vf_up(cptvf);
 788         if (err) {
 789                 dev_err(dev, "PF not responding to UP msg");
 790                 goto cptvf_free_irq_affinity;
 791         }
 792         err = cvm_crypto_init(cptvf);
 793         if (err) {
 794                 dev_err(dev, "Algorithm register failed\n");
 795                 goto cptvf_free_irq_affinity;
 796         }
 797         return 0;
 798
 799 cptvf_free_irq_affinity:
 800         cptvf_free_irq_affinity(cptvf, CPT_VF_INT_VEC_E_DONE);
 801         cptvf_free_irq_affinity(cptvf, CPT_VF_INT_VEC_E_MISC);
 802 cptvf_free_misc_irq:
 803         free_irq(pci_irq_vector(pdev, CPT_VF_INT_VEC_E_MISC), cptvf);
 804 cptvf_free_vectors:
 805         pci_free_irq_vectors(cptvf->pdev);
 806 cptvf_err_release_regions:
 807         pci_release_regions(pdev);
 808 cptvf_err_disable_device:
 809         pci_disable_device(pdev);
 810         pci_set_drvdata(pdev, NULL);
 811
 812         return err;
 813 }
 814
 815 static void cptvf_remove(struct pci_dev *pdev)
 816 {
 817         struct cpt_vf *cptvf = pci_get_drvdata(pdev);
 818
 819         if (!cptvf) {
 820                 dev_err(&pdev->dev, "Invalid CPT-VF device\n");
 821                 return;
 822         }
 823
 824         /* Convey DOWN to PF */
 825         if (cptvf_send_vf_down(cptvf)) {
 826                 dev_err(&pdev->dev, "PF not responding to DOWN msg");
 827         } else {
 828                 cptvf_free_irq_affinity(cptvf, CPT_VF_INT_VEC_E_DONE);
 829                 cptvf_free_irq_affinity(cptvf, CPT_VF_INT_VEC_E_MISC);
 830                 free_irq(pci_irq_vector(pdev, CPT_VF_INT_VEC_E_DONE), cptvf);
 831                 free_irq(pci_irq_vector(pdev, CPT_VF_INT_VEC_E_MISC), cptvf);
 832                 pci_free_irq_vectors(cptvf->pdev);
 833                 cptvf_sw_cleanup(cptvf);
 834                 pci_set_drvdata(pdev, NULL);
 835                 pci_release_regions(pdev);
 836                 pci_disable_device(pdev);
 837                 cvm_crypto_exit();
 838         }
 839 }
 840
 841 static void cptvf_shutdown(struct pci_dev *pdev)
 842 {
 843         cptvf_remove(pdev);
 844 }
 845
 846 /* Supported devices */
 847 static const struct pci_device_id cptvf_id_table[] = {
 848         {PCI_VDEVICE(CAVIUM, CPT_81XX_PCI_VF_DEVICE_ID), 0},
 849         { 0, }  /* end of table */
 850 };
 851
 852 static struct pci_driver cptvf_pci_driver = {
 853         .name = DRV_NAME,
 854         .id_table = cptvf_id_table,
 855         .probe = cptvf_probe,
 856         .remove = cptvf_remove,
 857         .shutdown = cptvf_shutdown,
 858 };
 859
 860 module_pci_driver(cptvf_pci_driver);
 861
 862 MODULE_AUTHOR("George Cherian <george.cherian@cavium.com>");
 863 MODULE_DESCRIPTION("Cavium Thunder CPT Virtual Function Driver");
 864 MODULE_LICENSE("GPL v2");
 865 MODULE_VERSION(DRV_VERSION);
 866 MODULE_DEVICE_TABLE(pci, cptvf_id_table);