drivers/crypto/caam/qi.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * CAAM/SEC 4.x QI transport/backend driver
   4  * Queue Interface backend functionality
   5  *
   6  * Copyright 2013-2016 Freescale Semiconductor, Inc.
   7  * Copyright 2016-2017, 2019-2020 NXP
   8  */
   9
  10 #include <linux/cpumask.h>
  11 #include <linux/device.h>
  12 #include <linux/dma-mapping.h>
  13 #include <linux/kernel.h>
  14 #include <linux/kthread.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/slab.h>
  18 #include <linux/string.h>
  19 #include <soc/fsl/qman.h>
  20
  21 #include "debugfs.h"
  22 #include "regs.h"
  23 #include "qi.h"
  24 #include "desc.h"
  25 #include "intern.h"
  26 #include "desc_constr.h"
  27
  28 #define PREHDR_RSLS_SHIFT       31
  29 #define PREHDR_ABS              BIT(25)
  30
  31 /*
  32  * Use a reasonable backlog of frames (per CPU) as congestion threshold,
  33  * so that resources used by the in-flight buffers do not become a memory hog.
  34  */
  35 #define MAX_RSP_FQ_BACKLOG_PER_CPU      256
  36
  37 #define CAAM_QI_ENQUEUE_RETRIES 10000
  38
  39 #define CAAM_NAPI_WEIGHT        63
  40
  41 /*
  42  * caam_napi - struct holding CAAM NAPI-related params
  43  * @irqtask: IRQ task for QI backend
  44  * @p: QMan portal
  45  */
  46 struct caam_napi {
  47         struct napi_struct irqtask;
  48         struct qman_portal *p;
  49 };
  50
  51 /*
  52  * caam_qi_pcpu_priv - percpu private data structure to main list of pending
  53  *                     responses expected on each cpu.
  54  * @caam_napi: CAAM NAPI params
  55  * @net_dev: netdev used by NAPI
  56  * @rsp_fq: response FQ from CAAM
  57  */
  58 struct caam_qi_pcpu_priv {
  59         struct caam_napi caam_napi;
  60         struct net_device net_dev;
  61         struct qman_fq *rsp_fq;
  62 } ____cacheline_aligned;
  63
  64 static DEFINE_PER_CPU(struct caam_qi_pcpu_priv, pcpu_qipriv);
  65 static DEFINE_PER_CPU(int, last_cpu);
  66
  67 /*
  68  * caam_qi_priv - CAAM QI backend private params
  69  * @cgr: QMan congestion group
  70  */
  71 struct caam_qi_priv {
  72         struct qman_cgr cgr;
  73 };
  74
  75 static struct caam_qi_priv qipriv ____cacheline_aligned;
  76
  77 /*
  78  * This is written by only one core - the one that initialized the CGR - and
  79  * read by multiple cores (all the others).
  80  */
  81 bool caam_congested __read_mostly;
  82 EXPORT_SYMBOL(caam_congested);
  83
  84 /*
  85  * This is a cache of buffers, from which the users of CAAM QI driver
  86  * can allocate short (CAAM_QI_MEMCACHE_SIZE) buffers. It's faster than
  87  * doing malloc on the hotpath.
  88  * NOTE: A more elegant solution would be to have some headroom in the frames
  89  *       being processed. This could be added by the dpaa-ethernet driver.
  90  *       This would pose a problem for userspace application processing which
  91  *       cannot know of this limitation. So for now, this will work.
  92  * NOTE: The memcache is SMP-safe. No need to handle spinlocks in-here
  93  */
  94 static struct kmem_cache *qi_cache;
  95
  96 static void *caam_iova_to_virt(struct iommu_domain *domain,
  97                                dma_addr_t iova_addr)
  98 {
  99         phys_addr_t phys_addr;
 100
 101         phys_addr = domain ? iommu_iova_to_phys(domain, iova_addr) : iova_addr;
 102
 103         return phys_to_virt(phys_addr);
 104 }
 105
 106 int caam_qi_enqueue(struct device *qidev, struct caam_drv_req *req)
 107 {
 108         struct qm_fd fd;
 109         dma_addr_t addr;
 110         int ret;
 111         int num_retries = 0;
 112
 113         qm_fd_clear_fd(&fd);
 114         qm_fd_set_compound(&fd, qm_sg_entry_get_len(&req->fd_sgt[1]));
 115
 116         addr = dma_map_single(qidev, req->fd_sgt, sizeof(req->fd_sgt),
 117                               DMA_BIDIRECTIONAL);
 118         if (dma_mapping_error(qidev, addr)) {
 119                 dev_err(qidev, "DMA mapping error for QI enqueue request\n");
 120                 return -EIO;
 121         }
 122         qm_fd_addr_set64(&fd, addr);
 123
 124         do {
 125                 ret = qman_enqueue(req->drv_ctx->req_fq, &fd);
 126                 if (likely(!ret)) {
 127                         refcount_inc(&req->drv_ctx->refcnt);
 128                         return 0;
 129                 }
 130
 131                 if (ret != -EBUSY)
 132                         break;
 133                 num_retries++;
 134         } while (num_retries < CAAM_QI_ENQUEUE_RETRIES);
 135
 136         dev_err(qidev, "qman_enqueue failed: %d\n", ret);
 137
 138         return ret;
 139 }
 140 EXPORT_SYMBOL(caam_qi_enqueue);
 141
 142 static void caam_fq_ern_cb(struct qman_portal *qm, struct qman_fq *fq,
 143                            const union qm_mr_entry *msg)
 144 {
 145         const struct qm_fd *fd;
 146         struct caam_drv_req *drv_req;
 147         struct device *qidev = &(raw_cpu_ptr(&pcpu_qipriv)->net_dev.dev);
 148         struct caam_drv_private *priv = dev_get_drvdata(qidev);
 149
 150         fd = &msg->ern.fd;
 151
 152         drv_req = caam_iova_to_virt(priv->domain, qm_fd_addr_get64(fd));
 153         if (!drv_req) {
 154                 dev_err(qidev,
 155                         "Can't find original request for CAAM response\n");
 156                 return;
 157         }
 158
 159         refcount_dec(&drv_req->drv_ctx->refcnt);
 160
 161         if (qm_fd_get_format(fd) != qm_fd_compound) {
 162                 dev_err(qidev, "Non-compound FD from CAAM\n");
 163                 return;
 164         }
 165
 166         dma_unmap_single(drv_req->drv_ctx->qidev, qm_fd_addr(fd),
 167                          sizeof(drv_req->fd_sgt), DMA_BIDIRECTIONAL);
 168
 169         if (fd->status)
 170                 drv_req->cbk(drv_req, be32_to_cpu(fd->status));
 171         else
 172                 drv_req->cbk(drv_req, JRSTA_SSRC_QI);
 173 }
 174
 175 static struct qman_fq *create_caam_req_fq(struct device *qidev,
 176                                           struct qman_fq *rsp_fq,
 177                                           dma_addr_t hwdesc,
 178                                           int fq_sched_flag)
 179 {
 180         int ret;
 181         struct qman_fq *req_fq;
 182         struct qm_mcc_initfq opts;
 183
 184         req_fq = kzalloc(sizeof(*req_fq), GFP_ATOMIC);
 185         if (!req_fq)
 186                 return ERR_PTR(-ENOMEM);
 187
 188         req_fq->cb.ern = caam_fq_ern_cb;
 189         req_fq->cb.fqs = NULL;
 190
 191         ret = qman_create_fq(0, QMAN_FQ_FLAG_DYNAMIC_FQID |
 192                                 QMAN_FQ_FLAG_TO_DCPORTAL, req_fq);
 193         if (ret) {
 194                 dev_err(qidev, "Failed to create session req FQ\n");
 195                 goto create_req_fq_fail;
 196         }
 197
 198         memset(&opts, 0, sizeof(opts));
 199         opts.we_mask = cpu_to_be16(QM_INITFQ_WE_FQCTRL | QM_INITFQ_WE_DESTWQ |
 200                                    QM_INITFQ_WE_CONTEXTB |
 201                                    QM_INITFQ_WE_CONTEXTA | QM_INITFQ_WE_CGID);
 202         opts.fqd.fq_ctrl = cpu_to_be16(QM_FQCTRL_CPCSTASH | QM_FQCTRL_CGE);
 203         qm_fqd_set_destwq(&opts.fqd, qm_channel_caam, 2);
 204         opts.fqd.context_b = cpu_to_be32(qman_fq_fqid(rsp_fq));
 205         qm_fqd_context_a_set64(&opts.fqd, hwdesc);
 206         opts.fqd.cgid = qipriv.cgr.cgrid;
 207
 208         ret = qman_init_fq(req_fq, fq_sched_flag, &opts);
 209         if (ret) {
 210                 dev_err(qidev, "Failed to init session req FQ\n");
 211                 goto init_req_fq_fail;
 212         }
 213
 214         dev_dbg(qidev, "Allocated request FQ %u for CPU %u\n", req_fq->fqid,
 215                 smp_processor_id());
 216         return req_fq;
 217
 218 init_req_fq_fail:
 219         qman_destroy_fq(req_fq);
 220 create_req_fq_fail:
 221         kfree(req_fq);
 222         return ERR_PTR(ret);
 223 }
 224
 225 static int empty_retired_fq(struct device *qidev, struct qman_fq *fq)
 226 {
 227         int ret;
 228
 229         ret = qman_volatile_dequeue(fq, QMAN_VOLATILE_FLAG_WAIT_INT |
 230                                     QMAN_VOLATILE_FLAG_FINISH,
 231                                     QM_VDQCR_PRECEDENCE_VDQCR |
 232                                     QM_VDQCR_NUMFRAMES_TILLEMPTY);
 233         if (ret) {
 234                 dev_err(qidev, "Volatile dequeue fail for FQ: %u\n", fq->fqid);
 235                 return ret;
 236         }
 237
 238         do {
 239                 struct qman_portal *p;
 240
 241                 p = qman_get_affine_portal(smp_processor_id());
 242                 qman_p_poll_dqrr(p, 16);
 243         } while (fq->flags & QMAN_FQ_STATE_NE);
 244
 245         return 0;
 246 }
 247
 248 static int kill_fq(struct device *qidev, struct qman_fq *fq)
 249 {
 250         u32 flags;
 251         int ret;
 252
 253         ret = qman_retire_fq(fq, &flags);
 254         if (ret < 0) {
 255                 dev_err(qidev, "qman_retire_fq failed: %d\n", ret);
 256                 return ret;
 257         }
 258
 259         if (!ret)
 260                 goto empty_fq;
 261
 262         /* Async FQ retirement condition */
 263         if (ret == 1) {
 264                 /* Retry till FQ gets in retired state */
 265                 do {
 266                         msleep(20);
 267                 } while (fq->state != qman_fq_state_retired);
 268
 269                 WARN_ON(fq->flags & QMAN_FQ_STATE_BLOCKOOS);
 270                 WARN_ON(fq->flags & QMAN_FQ_STATE_ORL);
 271         }
 272
 273 empty_fq:
 274         if (fq->flags & QMAN_FQ_STATE_NE) {
 275                 ret = empty_retired_fq(qidev, fq);
 276                 if (ret) {
 277                         dev_err(qidev, "empty_retired_fq fail for FQ: %u\n",
 278                                 fq->fqid);
 279                         return ret;
 280                 }
 281         }
 282
 283         ret = qman_oos_fq(fq);
 284         if (ret)
 285                 dev_err(qidev, "OOS of FQID: %u failed\n", fq->fqid);
 286
 287         qman_destroy_fq(fq);
 288         kfree(fq);
 289
 290         return ret;
 291 }
 292
 293 static int empty_caam_fq(struct qman_fq *fq, struct caam_drv_ctx *drv_ctx)
 294 {
 295         int ret;
 296         int retries = 10;
 297         struct qm_mcr_queryfq_np np;
 298
 299         /* Wait till the older CAAM FQ get empty */
 300         do {
 301                 ret = qman_query_fq_np(fq, &np);
 302                 if (ret)
 303                         return ret;
 304
 305                 if (!qm_mcr_np_get(&np, frm_cnt))
 306                         break;
 307
 308                 msleep(20);
 309         } while (1);
 310
 311         /* Wait until pending jobs from this FQ are processed by CAAM */
 312         do {
 313                 if (refcount_read(&drv_ctx->refcnt) == 1)
 314                         break;
 315
 316                 msleep(20);
 317         } while (--retries);
 318
 319         if (!retries)
 320                 dev_warn_once(drv_ctx->qidev, "%d frames from FQID %u still pending in CAAM\n",
 321                               refcount_read(&drv_ctx->refcnt), fq->fqid);
 322
 323         return 0;
 324 }
 325
 326 int caam_drv_ctx_update(struct caam_drv_ctx *drv_ctx, u32 *sh_desc)
 327 {
 328         int ret;
 329         u32 num_words;
 330         struct qman_fq *new_fq, *old_fq;
 331         struct device *qidev = drv_ctx->qidev;
 332
 333         num_words = desc_len(sh_desc);
 334         if (num_words > MAX_SDLEN) {
 335                 dev_err(qidev, "Invalid descriptor len: %d words\n", num_words);
 336                 return -EINVAL;
 337         }
 338
 339         /* Note down older req FQ */
 340         old_fq = drv_ctx->req_fq;
 341
 342         /* Create a new req FQ in parked state */
 343         new_fq = create_caam_req_fq(drv_ctx->qidev, drv_ctx->rsp_fq,
 344                                     drv_ctx->context_a, 0);
 345         if (IS_ERR(new_fq)) {
 346                 dev_err(qidev, "FQ allocation for shdesc update failed\n");
 347                 return PTR_ERR(new_fq);
 348         }
 349
 350         /* Hook up new FQ to context so that new requests keep queuing */
 351         drv_ctx->req_fq = new_fq;
 352
 353         /* Empty and remove the older FQ */
 354         ret = empty_caam_fq(old_fq, drv_ctx);
 355         if (ret) {
 356                 dev_err(qidev, "Old CAAM FQ empty failed: %d\n", ret);
 357
 358                 /* We can revert to older FQ */
 359                 drv_ctx->req_fq = old_fq;
 360
 361                 if (kill_fq(qidev, new_fq))
 362                         dev_warn(qidev, "New CAAM FQ kill failed\n");
 363
 364                 return ret;
 365         }
 366
 367         /*
 368          * Re-initialise pre-header. Set RSLS and SDLEN.
 369          * Update the shared descriptor for driver context.
 370          */
 371         drv_ctx->prehdr[0] = cpu_to_caam32((1 << PREHDR_RSLS_SHIFT) |
 372                                            num_words);
 373         drv_ctx->prehdr[1] = cpu_to_caam32(PREHDR_ABS);
 374         memcpy(drv_ctx->sh_desc, sh_desc, desc_bytes(sh_desc));
 375         dma_sync_single_for_device(qidev, drv_ctx->context_a,
 376                                    sizeof(drv_ctx->sh_desc) +
 377                                    sizeof(drv_ctx->prehdr),
 378                                    DMA_BIDIRECTIONAL);
 379
 380         /* Put the new FQ in scheduled state */
 381         ret = qman_schedule_fq(new_fq);
 382         if (ret) {
 383                 dev_err(qidev, "Fail to sched new CAAM FQ, ecode = %d\n", ret);
 384
 385                 /*
 386                  * We can kill new FQ and revert to old FQ.
 387                  * Since the desc is already modified, it is success case
 388                  */
 389
 390                 drv_ctx->req_fq = old_fq;
 391
 392                 if (kill_fq(qidev, new_fq))
 393                         dev_warn(qidev, "New CAAM FQ kill failed\n");
 394         } else if (kill_fq(qidev, old_fq)) {
 395                 dev_warn(qidev, "Old CAAM FQ kill failed\n");
 396         }
 397
 398         return 0;
 399 }
 400 EXPORT_SYMBOL(caam_drv_ctx_update);
 401
 402 struct caam_drv_ctx *caam_drv_ctx_init(struct device *qidev,
 403                                        int *cpu,
 404                                        u32 *sh_desc)
 405 {
 406         size_t size;
 407         u32 num_words;
 408         dma_addr_t hwdesc;
 409         struct caam_drv_ctx *drv_ctx;
 410         const cpumask_t *cpus = qman_affine_cpus();
 411
 412         num_words = desc_len(sh_desc);
 413         if (num_words > MAX_SDLEN) {
 414                 dev_err(qidev, "Invalid descriptor len: %d words\n",
 415                         num_words);
 416                 return ERR_PTR(-EINVAL);
 417         }
 418
 419         drv_ctx = kzalloc(sizeof(*drv_ctx), GFP_ATOMIC);
 420         if (!drv_ctx)
 421                 return ERR_PTR(-ENOMEM);
 422
 423         /*
 424          * Initialise pre-header - set RSLS and SDLEN - and shared descriptor
 425          * and dma-map them.
 426          */
 427         drv_ctx->prehdr[0] = cpu_to_caam32((1 << PREHDR_RSLS_SHIFT) |
 428                                            num_words);
 429         drv_ctx->prehdr[1] = cpu_to_caam32(PREHDR_ABS);
 430         memcpy(drv_ctx->sh_desc, sh_desc, desc_bytes(sh_desc));
 431         size = sizeof(drv_ctx->prehdr) + sizeof(drv_ctx->sh_desc);
 432         hwdesc = dma_map_single(qidev, drv_ctx->prehdr, size,
 433                                 DMA_BIDIRECTIONAL);
 434         if (dma_mapping_error(qidev, hwdesc)) {
 435                 dev_err(qidev, "DMA map error for preheader + shdesc\n");
 436                 kfree(drv_ctx);
 437                 return ERR_PTR(-ENOMEM);
 438         }
 439         drv_ctx->context_a = hwdesc;
 440
 441         /* If given CPU does not own the portal, choose another one that does */
 442         if (!cpumask_test_cpu(*cpu, cpus)) {
 443                 int *pcpu = &get_cpu_var(last_cpu);
 444
 445                 *pcpu = cpumask_next(*pcpu, cpus);
 446                 if (*pcpu >= nr_cpu_ids)
 447                         *pcpu = cpumask_first(cpus);
 448                 *cpu = *pcpu;
 449
 450                 put_cpu_var(last_cpu);
 451         }
 452         drv_ctx->cpu = *cpu;
 453
 454         /* Find response FQ hooked with this CPU */
 455         drv_ctx->rsp_fq = per_cpu(pcpu_qipriv.rsp_fq, drv_ctx->cpu);
 456
 457         /* Attach request FQ */
 458         drv_ctx->req_fq = create_caam_req_fq(qidev, drv_ctx->rsp_fq, hwdesc,
 459                                              QMAN_INITFQ_FLAG_SCHED);
 460         if (IS_ERR(drv_ctx->req_fq)) {
 461                 dev_err(qidev, "create_caam_req_fq failed\n");
 462                 dma_unmap_single(qidev, hwdesc, size, DMA_BIDIRECTIONAL);
 463                 kfree(drv_ctx);
 464                 return ERR_PTR(-ENOMEM);
 465         }
 466
 467         /* init reference counter used to track references to request FQ */
 468         refcount_set(&drv_ctx->refcnt, 1);
 469
 470         drv_ctx->qidev = qidev;
 471         return drv_ctx;
 472 }
 473 EXPORT_SYMBOL(caam_drv_ctx_init);
 474
 475 void *qi_cache_alloc(gfp_t flags)
 476 {
 477         return kmem_cache_alloc(qi_cache, flags);
 478 }
 479 EXPORT_SYMBOL(qi_cache_alloc);
 480
 481 void qi_cache_free(void *obj)
 482 {
 483         kmem_cache_free(qi_cache, obj);
 484 }
 485 EXPORT_SYMBOL(qi_cache_free);
 486
 487 static int caam_qi_poll(struct napi_struct *napi, int budget)
 488 {
 489         struct caam_napi *np = container_of(napi, struct caam_napi, irqtask);
 490
 491         int cleaned = qman_p_poll_dqrr(np->p, budget);
 492
 493         if (cleaned < budget) {
 494                 napi_complete(napi);
 495                 qman_p_irqsource_add(np->p, QM_PIRQ_DQRI);
 496         }
 497
 498         return cleaned;
 499 }
 500
 501 void caam_drv_ctx_rel(struct caam_drv_ctx *drv_ctx)
 502 {
 503         if (IS_ERR_OR_NULL(drv_ctx))
 504                 return;
 505
 506         /* Remove request FQ */
 507         if (kill_fq(drv_ctx->qidev, drv_ctx->req_fq))
 508                 dev_err(drv_ctx->qidev, "Crypto session req FQ kill failed\n");
 509
 510         dma_unmap_single(drv_ctx->qidev, drv_ctx->context_a,
 511                          sizeof(drv_ctx->sh_desc) + sizeof(drv_ctx->prehdr),
 512                          DMA_BIDIRECTIONAL);
 513         kfree(drv_ctx);
 514 }
 515 EXPORT_SYMBOL(caam_drv_ctx_rel);
 516
 517 static void caam_qi_shutdown(void *data)
 518 {
 519         int i;
 520         struct device *qidev = data;
 521         struct caam_qi_priv *priv = &qipriv;
 522         const cpumask_t *cpus = qman_affine_cpus();
 523
 524         for_each_cpu(i, cpus) {
 525                 struct napi_struct *irqtask;
 526
 527                 irqtask = &per_cpu_ptr(&pcpu_qipriv.caam_napi, i)->irqtask;
 528                 napi_disable(irqtask);
 529                 netif_napi_del(irqtask);
 530
 531                 if (kill_fq(qidev, per_cpu(pcpu_qipriv.rsp_fq, i)))
 532                         dev_err(qidev, "Rsp FQ kill failed, cpu: %d\n", i);
 533         }
 534
 535         qman_delete_cgr_safe(&priv->cgr);
 536         qman_release_cgrid(priv->cgr.cgrid);
 537
 538         kmem_cache_destroy(qi_cache);
 539 }
 540
 541 static void cgr_cb(struct qman_portal *qm, struct qman_cgr *cgr, int congested)
 542 {
 543         caam_congested = congested;
 544
 545         if (congested) {
 546                 caam_debugfs_qi_congested();
 547
 548                 pr_debug_ratelimited("CAAM entered congestion\n");
 549
 550         } else {
 551                 pr_debug_ratelimited("CAAM exited congestion\n");
 552         }
 553 }
 554
 555 static int caam_qi_napi_schedule(struct qman_portal *p, struct caam_napi *np,
 556                                  bool sched_napi)
 557 {
 558         if (sched_napi) {
 559                 /* Disable QMan IRQ source and invoke NAPI */
 560                 qman_p_irqsource_remove(p, QM_PIRQ_DQRI);
 561                 np->p = p;
 562                 napi_schedule(&np->irqtask);
 563                 return 1;
 564         }
 565         return 0;
 566 }
 567
 568 static enum qman_cb_dqrr_result caam_rsp_fq_dqrr_cb(struct qman_portal *p,
 569                                                     struct qman_fq *rsp_fq,
 570                                                     const struct qm_dqrr_entry *dqrr,
 571                                                     bool sched_napi)
 572 {
 573         struct caam_napi *caam_napi = raw_cpu_ptr(&pcpu_qipriv.caam_napi);
 574         struct caam_drv_req *drv_req;
 575         const struct qm_fd *fd;
 576         struct device *qidev = &(raw_cpu_ptr(&pcpu_qipriv)->net_dev.dev);
 577         struct caam_drv_private *priv = dev_get_drvdata(qidev);
 578         u32 status;
 579
 580         if (caam_qi_napi_schedule(p, caam_napi, sched_napi))
 581                 return qman_cb_dqrr_stop;
 582
 583         fd = &dqrr->fd;
 584
 585         drv_req = caam_iova_to_virt(priv->domain, qm_fd_addr_get64(fd));
 586         if (unlikely(!drv_req)) {
 587                 dev_err(qidev,
 588                         "Can't find original request for caam response\n");
 589                 return qman_cb_dqrr_consume;
 590         }
 591
 592         refcount_dec(&drv_req->drv_ctx->refcnt);
 593
 594         status = be32_to_cpu(fd->status);
 595         if (unlikely(status)) {
 596                 u32 ssrc = status & JRSTA_SSRC_MASK;
 597                 u8 err_id = status & JRSTA_CCBERR_ERRID_MASK;
 598
 599                 if (ssrc != JRSTA_SSRC_CCB_ERROR ||
 600                     err_id != JRSTA_CCBERR_ERRID_ICVCHK)
 601                         dev_err_ratelimited(qidev,
 602                                             "Error: %#x in CAAM response FD\n",
 603                                             status);
 604         }
 605
 606         if (unlikely(qm_fd_get_format(fd) != qm_fd_compound)) {
 607                 dev_err(qidev, "Non-compound FD from CAAM\n");
 608                 return qman_cb_dqrr_consume;
 609         }
 610
 611         dma_unmap_single(drv_req->drv_ctx->qidev, qm_fd_addr(fd),
 612                          sizeof(drv_req->fd_sgt), DMA_BIDIRECTIONAL);
 613
 614         drv_req->cbk(drv_req, status);
 615         return qman_cb_dqrr_consume;
 616 }
 617
 618 static int alloc_rsp_fq_cpu(struct device *qidev, unsigned int cpu)
 619 {
 620         struct qm_mcc_initfq opts;
 621         struct qman_fq *fq;
 622         int ret;
 623
 624         fq = kzalloc(sizeof(*fq), GFP_KERNEL);
 625         if (!fq)
 626                 return -ENOMEM;
 627
 628         fq->cb.dqrr = caam_rsp_fq_dqrr_cb;
 629
 630         ret = qman_create_fq(0, QMAN_FQ_FLAG_NO_ENQUEUE |
 631                              QMAN_FQ_FLAG_DYNAMIC_FQID, fq);
 632         if (ret) {
 633                 dev_err(qidev, "Rsp FQ create failed\n");
 634                 kfree(fq);
 635                 return -ENODEV;
 636         }
 637
 638         memset(&opts, 0, sizeof(opts));
 639         opts.we_mask = cpu_to_be16(QM_INITFQ_WE_FQCTRL | QM_INITFQ_WE_DESTWQ |
 640                                    QM_INITFQ_WE_CONTEXTB |
 641                                    QM_INITFQ_WE_CONTEXTA | QM_INITFQ_WE_CGID);
 642         opts.fqd.fq_ctrl = cpu_to_be16(QM_FQCTRL_CTXASTASHING |
 643                                        QM_FQCTRL_CPCSTASH | QM_FQCTRL_CGE);
 644         qm_fqd_set_destwq(&opts.fqd, qman_affine_channel(cpu), 3);
 645         opts.fqd.cgid = qipriv.cgr.cgrid;
 646         opts.fqd.context_a.stashing.exclusive = QM_STASHING_EXCL_CTX |
 647                                                 QM_STASHING_EXCL_DATA;
 648         qm_fqd_set_stashing(&opts.fqd, 0, 1, 1);
 649
 650         ret = qman_init_fq(fq, QMAN_INITFQ_FLAG_SCHED, &opts);
 651         if (ret) {
 652                 dev_err(qidev, "Rsp FQ init failed\n");
 653                 kfree(fq);
 654                 return -ENODEV;
 655         }
 656
 657         per_cpu(pcpu_qipriv.rsp_fq, cpu) = fq;
 658
 659         dev_dbg(qidev, "Allocated response FQ %u for CPU %u", fq->fqid, cpu);
 660         return 0;
 661 }
 662
 663 static int init_cgr(struct device *qidev)
 664 {
 665         int ret;
 666         struct qm_mcc_initcgr opts;
 667         const u64 val = (u64)cpumask_weight(qman_affine_cpus()) *
 668                         MAX_RSP_FQ_BACKLOG_PER_CPU;
 669
 670         ret = qman_alloc_cgrid(&qipriv.cgr.cgrid);
 671         if (ret) {
 672                 dev_err(qidev, "CGR alloc failed for rsp FQs: %d\n", ret);
 673                 return ret;
 674         }
 675
 676         qipriv.cgr.cb = cgr_cb;
 677         memset(&opts, 0, sizeof(opts));
 678         opts.we_mask = cpu_to_be16(QM_CGR_WE_CSCN_EN | QM_CGR_WE_CS_THRES |
 679                                    QM_CGR_WE_MODE);
 680         opts.cgr.cscn_en = QM_CGR_EN;
 681         opts.cgr.mode = QMAN_CGR_MODE_FRAME;
 682         qm_cgr_cs_thres_set64(&opts.cgr.cs_thres, val, 1);
 683
 684         ret = qman_create_cgr(&qipriv.cgr, QMAN_CGR_FLAG_USE_INIT, &opts);
 685         if (ret) {
 686                 dev_err(qidev, "Error %d creating CAAM CGRID: %u\n", ret,
 687                         qipriv.cgr.cgrid);
 688                 return ret;
 689         }
 690
 691         dev_dbg(qidev, "Congestion threshold set to %llu\n", val);
 692         return 0;
 693 }
 694
 695 static int alloc_rsp_fqs(struct device *qidev)
 696 {
 697         int ret, i;
 698         const cpumask_t *cpus = qman_affine_cpus();
 699
 700         /*Now create response FQs*/
 701         for_each_cpu(i, cpus) {
 702                 ret = alloc_rsp_fq_cpu(qidev, i);
 703                 if (ret) {
 704                         dev_err(qidev, "CAAM rsp FQ alloc failed, cpu: %u", i);
 705                         return ret;
 706                 }
 707         }
 708
 709         return 0;
 710 }
 711
 712 static void free_rsp_fqs(void)
 713 {
 714         int i;
 715         const cpumask_t *cpus = qman_affine_cpus();
 716
 717         for_each_cpu(i, cpus)
 718                 kfree(per_cpu(pcpu_qipriv.rsp_fq, i));
 719 }
 720
 721 int caam_qi_init(struct platform_device *caam_pdev)
 722 {
 723         int err, i;
 724         struct device *ctrldev = &caam_pdev->dev, *qidev;
 725         struct caam_drv_private *ctrlpriv;
 726         const cpumask_t *cpus = qman_affine_cpus();
 727
 728         ctrlpriv = dev_get_drvdata(ctrldev);
 729         qidev = ctrldev;
 730
 731         /* Initialize the congestion detection */
 732         err = init_cgr(qidev);
 733         if (err) {
 734                 dev_err(qidev, "CGR initialization failed: %d\n", err);
 735                 return err;
 736         }
 737
 738         /* Initialise response FQs */
 739         err = alloc_rsp_fqs(qidev);
 740         if (err) {
 741                 dev_err(qidev, "Can't allocate CAAM response FQs: %d\n", err);
 742                 free_rsp_fqs();
 743                 return err;
 744         }
 745
 746         /*
 747          * Enable the NAPI contexts on each of the core which has an affine
 748          * portal.
 749          */
 750         for_each_cpu(i, cpus) {
 751                 struct caam_qi_pcpu_priv *priv = per_cpu_ptr(&pcpu_qipriv, i);
 752                 struct caam_napi *caam_napi = &priv->caam_napi;
 753                 struct napi_struct *irqtask = &caam_napi->irqtask;
 754                 struct net_device *net_dev = &priv->net_dev;
 755
 756                 net_dev->dev = *qidev;
 757                 INIT_LIST_HEAD(&net_dev->napi_list);
 758
 759                 netif_napi_add_tx_weight(net_dev, irqtask, caam_qi_poll,
 760                                          CAAM_NAPI_WEIGHT);
 761
 762                 napi_enable(irqtask);
 763         }
 764
 765         qi_cache = kmem_cache_create("caamqicache", CAAM_QI_MEMCACHE_SIZE,
 766                                      dma_get_cache_alignment(), 0, NULL);
 767         if (!qi_cache) {
 768                 dev_err(qidev, "Can't allocate CAAM cache\n");
 769                 free_rsp_fqs();
 770                 return -ENOMEM;
 771         }
 772
 773         caam_debugfs_qi_init(ctrlpriv);
 774
 775         err = devm_add_action_or_reset(qidev, caam_qi_shutdown, ctrlpriv);
 776         if (err)
 777                 return err;
 778
 779         dev_info(qidev, "Linux CAAM Queue I/F driver initialised\n");
 780         return 0;
 781 }