drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright 2019 NXP
   3
   4 #include <linux/init.h>
   5 #include <linux/module.h>
   6 #include <linux/dmapool.h>
   7 #include <linux/of_irq.h>
   8 #include <linux/iommu.h>
   9 #include <linux/sys_soc.h>
  10 #include <linux/fsl/mc.h>
  11 #include <soc/fsl/dpaa2-io.h>
  12
  13 #include "../virt-dma.h"
  14 #include "dpdmai.h"
  15 #include "dpaa2-qdma.h"
  16
  17 static bool smmu_disable = true;
  18
  19 static struct dpaa2_qdma_chan *to_dpaa2_qdma_chan(struct dma_chan *chan)
  20 {
  21         return container_of(chan, struct dpaa2_qdma_chan, vchan.chan);
  22 }
  23
  24 static struct dpaa2_qdma_comp *to_fsl_qdma_comp(struct virt_dma_desc *vd)
  25 {
  26         return container_of(vd, struct dpaa2_qdma_comp, vdesc);
  27 }
  28
  29 static int dpaa2_qdma_alloc_chan_resources(struct dma_chan *chan)
  30 {
  31         struct dpaa2_qdma_chan *dpaa2_chan = to_dpaa2_qdma_chan(chan);
  32         struct dpaa2_qdma_engine *dpaa2_qdma = dpaa2_chan->qdma;
  33         struct device *dev = &dpaa2_qdma->priv->dpdmai_dev->dev;
  34
  35         dpaa2_chan->fd_pool = dma_pool_create("fd_pool", dev,
  36                                               sizeof(struct dpaa2_fd),
  37                                               sizeof(struct dpaa2_fd), 0);
  38         if (!dpaa2_chan->fd_pool)
  39                 goto err;
  40
  41         dpaa2_chan->fl_pool =
  42                 dma_pool_create("fl_pool", dev,
  43                                  sizeof(struct dpaa2_fl_entry) * 3,
  44                                  sizeof(struct dpaa2_fl_entry), 0);
  45
  46         if (!dpaa2_chan->fl_pool)
  47                 goto err_fd;
  48
  49         dpaa2_chan->sdd_pool =
  50                 dma_pool_create("sdd_pool", dev,
  51                                 sizeof(struct dpaa2_qdma_sd_d) * 2,
  52                                 sizeof(struct dpaa2_qdma_sd_d), 0);
  53         if (!dpaa2_chan->sdd_pool)
  54                 goto err_fl;
  55
  56         return dpaa2_qdma->desc_allocated++;
  57 err_fl:
  58         dma_pool_destroy(dpaa2_chan->fl_pool);
  59 err_fd:
  60         dma_pool_destroy(dpaa2_chan->fd_pool);
  61 err:
  62         return -ENOMEM;
  63 }
  64
  65 static void dpaa2_qdma_free_chan_resources(struct dma_chan *chan)
  66 {
  67         struct dpaa2_qdma_chan *dpaa2_chan = to_dpaa2_qdma_chan(chan);
  68         struct dpaa2_qdma_engine *dpaa2_qdma = dpaa2_chan->qdma;
  69         unsigned long flags;
  70
  71         LIST_HEAD(head);
  72
  73         spin_lock_irqsave(&dpaa2_chan->vchan.lock, flags);
  74         vchan_get_all_descriptors(&dpaa2_chan->vchan, &head);
  75         spin_unlock_irqrestore(&dpaa2_chan->vchan.lock, flags);
  76
  77         vchan_dma_desc_free_list(&dpaa2_chan->vchan, &head);
  78
  79         dpaa2_dpdmai_free_comp(dpaa2_chan, &dpaa2_chan->comp_used);
  80         dpaa2_dpdmai_free_comp(dpaa2_chan, &dpaa2_chan->comp_free);
  81
  82         dma_pool_destroy(dpaa2_chan->fd_pool);
  83         dma_pool_destroy(dpaa2_chan->fl_pool);
  84         dma_pool_destroy(dpaa2_chan->sdd_pool);
  85         dpaa2_qdma->desc_allocated--;
  86 }
  87
  88 /*
  89  * Request a command descriptor for enqueue.
  90  */
  91 static struct dpaa2_qdma_comp *
  92 dpaa2_qdma_request_desc(struct dpaa2_qdma_chan *dpaa2_chan)
  93 {
  94         struct dpaa2_qdma_priv *qdma_priv = dpaa2_chan->qdma->priv;
  95         struct device *dev = &qdma_priv->dpdmai_dev->dev;
  96         struct dpaa2_qdma_comp *comp_temp = NULL;
  97         unsigned long flags;
  98
  99         spin_lock_irqsave(&dpaa2_chan->queue_lock, flags);
 100         if (list_empty(&dpaa2_chan->comp_free)) {
 101                 spin_unlock_irqrestore(&dpaa2_chan->queue_lock, flags);
 102                 comp_temp = kzalloc(sizeof(*comp_temp), GFP_NOWAIT);
 103                 if (!comp_temp)
 104                         goto err;
 105                 comp_temp->fd_virt_addr =
 106                         dma_pool_alloc(dpaa2_chan->fd_pool, GFP_NOWAIT,
 107                                        &comp_temp->fd_bus_addr);
 108                 if (!comp_temp->fd_virt_addr)
 109                         goto err_comp;
 110
 111                 comp_temp->fl_virt_addr =
 112                         dma_pool_alloc(dpaa2_chan->fl_pool, GFP_NOWAIT,
 113                                        &comp_temp->fl_bus_addr);
 114                 if (!comp_temp->fl_virt_addr)
 115                         goto err_fd_virt;
 116
 117                 comp_temp->desc_virt_addr =
 118                         dma_pool_alloc(dpaa2_chan->sdd_pool, GFP_NOWAIT,
 119                                        &comp_temp->desc_bus_addr);
 120                 if (!comp_temp->desc_virt_addr)
 121                         goto err_fl_virt;
 122
 123                 comp_temp->qchan = dpaa2_chan;
 124                 return comp_temp;
 125         }
 126
 127         comp_temp = list_first_entry(&dpaa2_chan->comp_free,
 128                                      struct dpaa2_qdma_comp, list);
 129         list_del(&comp_temp->list);
 130         spin_unlock_irqrestore(&dpaa2_chan->queue_lock, flags);
 131
 132         comp_temp->qchan = dpaa2_chan;
 133
 134         return comp_temp;
 135
 136 err_fl_virt:
 137                 dma_pool_free(dpaa2_chan->fl_pool,
 138                               comp_temp->fl_virt_addr,
 139                               comp_temp->fl_bus_addr);
 140 err_fd_virt:
 141                 dma_pool_free(dpaa2_chan->fd_pool,
 142                               comp_temp->fd_virt_addr,
 143                               comp_temp->fd_bus_addr);
 144 err_comp:
 145         kfree(comp_temp);
 146 err:
 147         dev_err(dev, "Failed to request descriptor\n");
 148         return NULL;
 149 }
 150
 151 static void
 152 dpaa2_qdma_populate_fd(u32 format, struct dpaa2_qdma_comp *dpaa2_comp)
 153 {
 154         struct dpaa2_fd *fd;
 155
 156         fd = dpaa2_comp->fd_virt_addr;
 157         memset(fd, 0, sizeof(struct dpaa2_fd));
 158
 159         /* fd populated */
 160         dpaa2_fd_set_addr(fd, dpaa2_comp->fl_bus_addr);
 161
 162         /*
 163          * Bypass memory translation, Frame list format, short length disable
 164          * we need to disable BMT if fsl-mc use iova addr
 165          */
 166         if (smmu_disable)
 167                 dpaa2_fd_set_bpid(fd, QMAN_FD_BMT_ENABLE);
 168         dpaa2_fd_set_format(fd, QMAN_FD_FMT_ENABLE | QMAN_FD_SL_DISABLE);
 169
 170         dpaa2_fd_set_frc(fd, format | QDMA_SER_CTX);
 171 }
 172
 173 /* first frame list for descriptor buffer */
 174 static void
 175 dpaa2_qdma_populate_first_framel(struct dpaa2_fl_entry *f_list,
 176                                  struct dpaa2_qdma_comp *dpaa2_comp,
 177                                  bool wrt_changed)
 178 {
 179         struct dpaa2_qdma_sd_d *sdd;
 180
 181         sdd = dpaa2_comp->desc_virt_addr;
 182         memset(sdd, 0, 2 * (sizeof(*sdd)));
 183
 184         /* source descriptor CMD */
 185         sdd->cmd = cpu_to_le32(QDMA_SD_CMD_RDTTYPE_COHERENT);
 186         sdd++;
 187
 188         /* dest descriptor CMD */
 189         if (wrt_changed)
 190                 sdd->cmd = cpu_to_le32(LX2160_QDMA_DD_CMD_WRTTYPE_COHERENT);
 191         else
 192                 sdd->cmd = cpu_to_le32(QDMA_DD_CMD_WRTTYPE_COHERENT);
 193
 194         memset(f_list, 0, sizeof(struct dpaa2_fl_entry));
 195
 196         /* first frame list to source descriptor */
 197         dpaa2_fl_set_addr(f_list, dpaa2_comp->desc_bus_addr);
 198         dpaa2_fl_set_len(f_list, 0x20);
 199         dpaa2_fl_set_format(f_list, QDMA_FL_FMT_SBF | QDMA_FL_SL_LONG);
 200
 201         /* bypass memory translation */
 202         if (smmu_disable)
 203                 f_list->bpid = cpu_to_le16(QDMA_FL_BMT_ENABLE);
 204 }
 205
 206 /* source and destination frame list */
 207 static void
 208 dpaa2_qdma_populate_frames(struct dpaa2_fl_entry *f_list,
 209                            dma_addr_t dst, dma_addr_t src,
 210                            size_t len, uint8_t fmt)
 211 {
 212         /* source frame list to source buffer */
 213         memset(f_list, 0, sizeof(struct dpaa2_fl_entry));
 214
 215         dpaa2_fl_set_addr(f_list, src);
 216         dpaa2_fl_set_len(f_list, len);
 217
 218         /* single buffer frame or scatter gather frame */
 219         dpaa2_fl_set_format(f_list, (fmt | QDMA_FL_SL_LONG));
 220
 221         /* bypass memory translation */
 222         if (smmu_disable)
 223                 f_list->bpid = cpu_to_le16(QDMA_FL_BMT_ENABLE);
 224
 225         f_list++;
 226
 227         /* destination frame list to destination buffer */
 228         memset(f_list, 0, sizeof(struct dpaa2_fl_entry));
 229
 230         dpaa2_fl_set_addr(f_list, dst);
 231         dpaa2_fl_set_len(f_list, len);
 232         dpaa2_fl_set_format(f_list, (fmt | QDMA_FL_SL_LONG));
 233         /* single buffer frame or scatter gather frame */
 234         dpaa2_fl_set_final(f_list, QDMA_FL_F);
 235         /* bypass memory translation */
 236         if (smmu_disable)
 237                 f_list->bpid = cpu_to_le16(QDMA_FL_BMT_ENABLE);
 238 }
 239
 240 static struct dma_async_tx_descriptor
 241 *dpaa2_qdma_prep_memcpy(struct dma_chan *chan, dma_addr_t dst,
 242                         dma_addr_t src, size_t len, ulong flags)
 243 {
 244         struct dpaa2_qdma_chan *dpaa2_chan = to_dpaa2_qdma_chan(chan);
 245         struct dpaa2_qdma_engine *dpaa2_qdma;
 246         struct dpaa2_qdma_comp *dpaa2_comp;
 247         struct dpaa2_fl_entry *f_list;
 248         bool wrt_changed;
 249
 250         dpaa2_qdma = dpaa2_chan->qdma;
 251         dpaa2_comp = dpaa2_qdma_request_desc(dpaa2_chan);
 252         if (!dpaa2_comp)
 253                 return NULL;
 254
 255         wrt_changed = (bool)dpaa2_qdma->qdma_wrtype_fixup;
 256
 257         /* populate Frame descriptor */
 258         dpaa2_qdma_populate_fd(QDMA_FD_LONG_FORMAT, dpaa2_comp);
 259
 260         f_list = dpaa2_comp->fl_virt_addr;
 261
 262         /* first frame list for descriptor buffer (logn format) */
 263         dpaa2_qdma_populate_first_framel(f_list, dpaa2_comp, wrt_changed);
 264
 265         f_list++;
 266
 267         dpaa2_qdma_populate_frames(f_list, dst, src, len, QDMA_FL_FMT_SBF);
 268
 269         return vchan_tx_prep(&dpaa2_chan->vchan, &dpaa2_comp->vdesc, flags);
 270 }
 271
 272 static void dpaa2_qdma_issue_pending(struct dma_chan *chan)
 273 {
 274         struct dpaa2_qdma_chan *dpaa2_chan = to_dpaa2_qdma_chan(chan);
 275         struct dpaa2_qdma_comp *dpaa2_comp;
 276         struct virt_dma_desc *vdesc;
 277         struct dpaa2_fd *fd;
 278         unsigned long flags;
 279         int err;
 280
 281         spin_lock_irqsave(&dpaa2_chan->queue_lock, flags);
 282         spin_lock(&dpaa2_chan->vchan.lock);
 283         if (vchan_issue_pending(&dpaa2_chan->vchan)) {
 284                 vdesc = vchan_next_desc(&dpaa2_chan->vchan);
 285                 if (!vdesc)
 286                         goto err_enqueue;
 287                 dpaa2_comp = to_fsl_qdma_comp(vdesc);
 288
 289                 fd = dpaa2_comp->fd_virt_addr;
 290
 291                 list_del(&vdesc->node);
 292                 list_add_tail(&dpaa2_comp->list, &dpaa2_chan->comp_used);
 293
 294                 err = dpaa2_io_service_enqueue_fq(NULL, dpaa2_chan->fqid, fd);
 295                 if (err) {
 296                         list_move_tail(&dpaa2_comp->list,
 297                                        &dpaa2_chan->comp_free);
 298                 }
 299         }
 300 err_enqueue:
 301         spin_unlock(&dpaa2_chan->vchan.lock);
 302         spin_unlock_irqrestore(&dpaa2_chan->queue_lock, flags);
 303 }
 304
 305 static int __cold dpaa2_qdma_setup(struct fsl_mc_device *ls_dev)
 306 {
 307         struct dpaa2_qdma_priv_per_prio *ppriv;
 308         struct device *dev = &ls_dev->dev;
 309         struct dpaa2_qdma_priv *priv;
 310         u8 prio_def = DPDMAI_PRIO_NUM;
 311         int err = -EINVAL;
 312         int i;
 313
 314         priv = dev_get_drvdata(dev);
 315
 316         priv->dev = dev;
 317         priv->dpqdma_id = ls_dev->obj_desc.id;
 318
 319         /* Get the handle for the DPDMAI this interface is associate with */
 320         err = dpdmai_open(priv->mc_io, 0, priv->dpqdma_id, &ls_dev->mc_handle);
 321         if (err) {
 322                 dev_err(dev, "dpdmai_open() failed\n");
 323                 return err;
 324         }
 325
 326         dev_dbg(dev, "Opened dpdmai object successfully\n");
 327
 328         err = dpdmai_get_attributes(priv->mc_io, 0, ls_dev->mc_handle,
 329                                     &priv->dpdmai_attr);
 330         if (err) {
 331                 dev_err(dev, "dpdmai_get_attributes() failed\n");
 332                 goto exit;
 333         }
 334
 335         if (priv->dpdmai_attr.version.major > DPDMAI_VER_MAJOR) {
 336                 err = -EINVAL;
 337                 dev_err(dev, "DPDMAI major version mismatch\n"
 338                              "Found %u.%u, supported version is %u.%u\n",
 339                                 priv->dpdmai_attr.version.major,
 340                                 priv->dpdmai_attr.version.minor,
 341                                 DPDMAI_VER_MAJOR, DPDMAI_VER_MINOR);
 342                 goto exit;
 343         }
 344
 345         if (priv->dpdmai_attr.version.minor > DPDMAI_VER_MINOR) {
 346                 err = -EINVAL;
 347                 dev_err(dev, "DPDMAI minor version mismatch\n"
 348                              "Found %u.%u, supported version is %u.%u\n",
 349                                 priv->dpdmai_attr.version.major,
 350                                 priv->dpdmai_attr.version.minor,
 351                                 DPDMAI_VER_MAJOR, DPDMAI_VER_MINOR);
 352                 goto exit;
 353         }
 354
 355         priv->num_pairs = min(priv->dpdmai_attr.num_of_priorities, prio_def);
 356         ppriv = kcalloc(priv->num_pairs, sizeof(*ppriv), GFP_KERNEL);
 357         if (!ppriv) {
 358                 err = -ENOMEM;
 359                 goto exit;
 360         }
 361         priv->ppriv = ppriv;
 362
 363         for (i = 0; i < priv->num_pairs; i++) {
 364                 err = dpdmai_get_rx_queue(priv->mc_io, 0, ls_dev->mc_handle,
 365                                           i, &priv->rx_queue_attr[i]);
 366                 if (err) {
 367                         dev_err(dev, "dpdmai_get_rx_queue() failed\n");
 368                         goto exit;
 369                 }
 370                 ppriv->rsp_fqid = priv->rx_queue_attr[i].fqid;
 371
 372                 err = dpdmai_get_tx_queue(priv->mc_io, 0, ls_dev->mc_handle,
 373                                           i, &priv->tx_fqid[i]);
 374                 if (err) {
 375                         dev_err(dev, "dpdmai_get_tx_queue() failed\n");
 376                         goto exit;
 377                 }
 378                 ppriv->req_fqid = priv->tx_fqid[i];
 379                 ppriv->prio = i;
 380                 ppriv->priv = priv;
 381                 ppriv++;
 382         }
 383
 384         return 0;
 385 exit:
 386         dpdmai_close(priv->mc_io, 0, ls_dev->mc_handle);
 387         return err;
 388 }
 389
 390 static void dpaa2_qdma_fqdan_cb(struct dpaa2_io_notification_ctx *ctx)
 391 {
 392         struct dpaa2_qdma_priv_per_prio *ppriv = container_of(ctx,
 393                         struct dpaa2_qdma_priv_per_prio, nctx);
 394         struct dpaa2_qdma_comp *dpaa2_comp, *_comp_tmp;
 395         struct dpaa2_qdma_priv *priv = ppriv->priv;
 396         u32 n_chans = priv->dpaa2_qdma->n_chans;
 397         struct dpaa2_qdma_chan *qchan;
 398         const struct dpaa2_fd *fd_eq;
 399         const struct dpaa2_fd *fd;
 400         struct dpaa2_dq *dq;
 401         int is_last = 0;
 402         int found;
 403         u8 status;
 404         int err;
 405         int i;
 406
 407         do {
 408                 err = dpaa2_io_service_pull_fq(NULL, ppriv->rsp_fqid,
 409                                                ppriv->store);
 410         } while (err);
 411
 412         while (!is_last) {
 413                 do {
 414                         dq = dpaa2_io_store_next(ppriv->store, &is_last);
 415                 } while (!is_last && !dq);
 416                 if (!dq) {
 417                         dev_err(priv->dev, "FQID returned no valid frames!\n");
 418                         continue;
 419                 }
 420
 421                 /* obtain FD and process the error */
 422                 fd = dpaa2_dq_fd(dq);
 423
 424                 status = dpaa2_fd_get_ctrl(fd) & 0xff;
 425                 if (status)
 426                         dev_err(priv->dev, "FD error occurred\n");
 427                 found = 0;
 428                 for (i = 0; i < n_chans; i++) {
 429                         qchan = &priv->dpaa2_qdma->chans[i];
 430                         spin_lock(&qchan->queue_lock);
 431                         if (list_empty(&qchan->comp_used)) {
 432                                 spin_unlock(&qchan->queue_lock);
 433                                 continue;
 434                         }
 435                         list_for_each_entry_safe(dpaa2_comp, _comp_tmp,
 436                                                  &qchan->comp_used, list) {
 437                                 fd_eq = dpaa2_comp->fd_virt_addr;
 438
 439                                 if (le64_to_cpu(fd_eq->simple.addr) ==
 440                                     le64_to_cpu(fd->simple.addr)) {
 441                                         spin_lock(&qchan->vchan.lock);
 442                                         vchan_cookie_complete(&
 443                                                         dpaa2_comp->vdesc);
 444                                         spin_unlock(&qchan->vchan.lock);
 445                                         found = 1;
 446                                         break;
 447                                 }
 448                         }
 449                         spin_unlock(&qchan->queue_lock);
 450                         if (found)
 451                                 break;
 452                 }
 453         }
 454
 455         dpaa2_io_service_rearm(NULL, ctx);
 456 }
 457
 458 static int __cold dpaa2_qdma_dpio_setup(struct dpaa2_qdma_priv *priv)
 459 {
 460         struct dpaa2_qdma_priv_per_prio *ppriv;
 461         struct device *dev = priv->dev;
 462         int err = -EINVAL;
 463         int i, num;
 464
 465         num = priv->num_pairs;
 466         ppriv = priv->ppriv;
 467         for (i = 0; i < num; i++) {
 468                 ppriv->nctx.is_cdan = 0;
 469                 ppriv->nctx.desired_cpu = DPAA2_IO_ANY_CPU;
 470                 ppriv->nctx.id = ppriv->rsp_fqid;
 471                 ppriv->nctx.cb = dpaa2_qdma_fqdan_cb;
 472                 err = dpaa2_io_service_register(NULL, &ppriv->nctx, dev);
 473                 if (err) {
 474                         dev_err(dev, "Notification register failed\n");
 475                         goto err_service;
 476                 }
 477
 478                 ppriv->store =
 479                         dpaa2_io_store_create(DPAA2_QDMA_STORE_SIZE, dev);
 480                 if (!ppriv->store) {
 481                         err = -ENOMEM;
 482                         dev_err(dev, "dpaa2_io_store_create() failed\n");
 483                         goto err_store;
 484                 }
 485
 486                 ppriv++;
 487         }
 488         return 0;
 489
 490 err_store:
 491         dpaa2_io_service_deregister(NULL, &ppriv->nctx, dev);
 492 err_service:
 493         ppriv--;
 494         while (ppriv >= priv->ppriv) {
 495                 dpaa2_io_service_deregister(NULL, &ppriv->nctx, dev);
 496                 dpaa2_io_store_destroy(ppriv->store);
 497                 ppriv--;
 498         }
 499         return err;
 500 }
 501
 502 static void dpaa2_dpmai_store_free(struct dpaa2_qdma_priv *priv)
 503 {
 504         struct dpaa2_qdma_priv_per_prio *ppriv = priv->ppriv;
 505         int i;
 506
 507         for (i = 0; i < priv->num_pairs; i++) {
 508                 dpaa2_io_store_destroy(ppriv->store);
 509                 ppriv++;
 510         }
 511 }
 512
 513 static void dpaa2_dpdmai_dpio_free(struct dpaa2_qdma_priv *priv)
 514 {
 515         struct dpaa2_qdma_priv_per_prio *ppriv = priv->ppriv;
 516         struct device *dev = priv->dev;
 517         int i;
 518
 519         for (i = 0; i < priv->num_pairs; i++) {
 520                 dpaa2_io_service_deregister(NULL, &ppriv->nctx, dev);
 521                 ppriv++;
 522         }
 523 }
 524
 525 static int __cold dpaa2_dpdmai_bind(struct dpaa2_qdma_priv *priv)
 526 {
 527         struct dpdmai_rx_queue_cfg rx_queue_cfg;
 528         struct dpaa2_qdma_priv_per_prio *ppriv;
 529         struct device *dev = priv->dev;
 530         struct fsl_mc_device *ls_dev;
 531         int i, num;
 532         int err;
 533
 534         ls_dev = to_fsl_mc_device(dev);
 535         num = priv->num_pairs;
 536         ppriv = priv->ppriv;
 537         for (i = 0; i < num; i++) {
 538                 rx_queue_cfg.options = DPDMAI_QUEUE_OPT_USER_CTX |
 539                                         DPDMAI_QUEUE_OPT_DEST;
 540                 rx_queue_cfg.user_ctx = ppriv->nctx.qman64;
 541                 rx_queue_cfg.dest_cfg.dest_type = DPDMAI_DEST_DPIO;
 542                 rx_queue_cfg.dest_cfg.dest_id = ppriv->nctx.dpio_id;
 543                 rx_queue_cfg.dest_cfg.priority = ppriv->prio;
 544                 err = dpdmai_set_rx_queue(priv->mc_io, 0, ls_dev->mc_handle,
 545                                           rx_queue_cfg.dest_cfg.priority,
 546                                           &rx_queue_cfg);
 547                 if (err) {
 548                         dev_err(dev, "dpdmai_set_rx_queue() failed\n");
 549                         return err;
 550                 }
 551
 552                 ppriv++;
 553         }
 554
 555         return 0;
 556 }
 557
 558 static int __cold dpaa2_dpdmai_dpio_unbind(struct dpaa2_qdma_priv *priv)
 559 {
 560         struct dpaa2_qdma_priv_per_prio *ppriv = priv->ppriv;
 561         struct device *dev = priv->dev;
 562         struct fsl_mc_device *ls_dev;
 563         int err = 0;
 564         int i;
 565
 566         ls_dev = to_fsl_mc_device(dev);
 567
 568         for (i = 0; i < priv->num_pairs; i++) {
 569                 ppriv->nctx.qman64 = 0;
 570                 ppriv->nctx.dpio_id = 0;
 571                 ppriv++;
 572         }
 573
 574         err = dpdmai_reset(priv->mc_io, 0, ls_dev->mc_handle);
 575         if (err)
 576                 dev_err(dev, "dpdmai_reset() failed\n");
 577
 578         return err;
 579 }
 580
 581 static void dpaa2_dpdmai_free_comp(struct dpaa2_qdma_chan *qchan,
 582                                    struct list_head *head)
 583 {
 584         struct dpaa2_qdma_comp *comp_tmp, *_comp_tmp;
 585         unsigned long flags;
 586
 587         list_for_each_entry_safe(comp_tmp, _comp_tmp,
 588                                  head, list) {
 589                 spin_lock_irqsave(&qchan->queue_lock, flags);
 590                 list_del(&comp_tmp->list);
 591                 spin_unlock_irqrestore(&qchan->queue_lock, flags);
 592                 dma_pool_free(qchan->fd_pool,
 593                               comp_tmp->fd_virt_addr,
 594                               comp_tmp->fd_bus_addr);
 595                 dma_pool_free(qchan->fl_pool,
 596                               comp_tmp->fl_virt_addr,
 597                               comp_tmp->fl_bus_addr);
 598                 dma_pool_free(qchan->sdd_pool,
 599                               comp_tmp->desc_virt_addr,
 600                               comp_tmp->desc_bus_addr);
 601                 kfree(comp_tmp);
 602         }
 603 }
 604
 605 static void dpaa2_dpdmai_free_channels(struct dpaa2_qdma_engine *dpaa2_qdma)
 606 {
 607         struct dpaa2_qdma_chan *qchan;
 608         int num, i;
 609
 610         num = dpaa2_qdma->n_chans;
 611         for (i = 0; i < num; i++) {
 612                 qchan = &dpaa2_qdma->chans[i];
 613                 dpaa2_dpdmai_free_comp(qchan, &qchan->comp_used);
 614                 dpaa2_dpdmai_free_comp(qchan, &qchan->comp_free);
 615                 dma_pool_destroy(qchan->fd_pool);
 616                 dma_pool_destroy(qchan->fl_pool);
 617                 dma_pool_destroy(qchan->sdd_pool);
 618         }
 619 }
 620
 621 static void dpaa2_qdma_free_desc(struct virt_dma_desc *vdesc)
 622 {
 623         struct dpaa2_qdma_comp *dpaa2_comp;
 624         struct dpaa2_qdma_chan *qchan;
 625         unsigned long flags;
 626
 627         dpaa2_comp = to_fsl_qdma_comp(vdesc);
 628         qchan = dpaa2_comp->qchan;
 629         spin_lock_irqsave(&qchan->queue_lock, flags);
 630         list_move_tail(&dpaa2_comp->list, &qchan->comp_free);
 631         spin_unlock_irqrestore(&qchan->queue_lock, flags);
 632 }
 633
 634 static int dpaa2_dpdmai_init_channels(struct dpaa2_qdma_engine *dpaa2_qdma)
 635 {
 636         struct dpaa2_qdma_priv *priv = dpaa2_qdma->priv;
 637         struct dpaa2_qdma_chan *dpaa2_chan;
 638         int num = priv->num_pairs;
 639         int i;
 640
 641         INIT_LIST_HEAD(&dpaa2_qdma->dma_dev.channels);
 642         for (i = 0; i < dpaa2_qdma->n_chans; i++) {
 643                 dpaa2_chan = &dpaa2_qdma->chans[i];
 644                 dpaa2_chan->qdma = dpaa2_qdma;
 645                 dpaa2_chan->fqid = priv->tx_fqid[i % num];
 646                 dpaa2_chan->vchan.desc_free = dpaa2_qdma_free_desc;
 647                 vchan_init(&dpaa2_chan->vchan, &dpaa2_qdma->dma_dev);
 648                 spin_lock_init(&dpaa2_chan->queue_lock);
 649                 INIT_LIST_HEAD(&dpaa2_chan->comp_used);
 650                 INIT_LIST_HEAD(&dpaa2_chan->comp_free);
 651         }
 652         return 0;
 653 }
 654
 655 static int dpaa2_qdma_probe(struct fsl_mc_device *dpdmai_dev)
 656 {
 657         struct device *dev = &dpdmai_dev->dev;
 658         struct dpaa2_qdma_engine *dpaa2_qdma;
 659         struct dpaa2_qdma_priv *priv;
 660         int err;
 661
 662         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 663         if (!priv)
 664                 return -ENOMEM;
 665         dev_set_drvdata(dev, priv);
 666         priv->dpdmai_dev = dpdmai_dev;
 667
 668         priv->iommu_domain = iommu_get_domain_for_dev(dev);
 669         if (priv->iommu_domain)
 670                 smmu_disable = false;
 671
 672         /* obtain a MC portal */
 673         err = fsl_mc_portal_allocate(dpdmai_dev, 0, &priv->mc_io);
 674         if (err) {
 675                 if (err == -ENXIO)
 676                         err = -EPROBE_DEFER;
 677                 else
 678                         dev_err(dev, "MC portal allocation failed\n");
 679                 goto err_mcportal;
 680         }
 681
 682         /* DPDMAI initialization */
 683         err = dpaa2_qdma_setup(dpdmai_dev);
 684         if (err) {
 685                 dev_err(dev, "dpaa2_dpdmai_setup() failed\n");
 686                 goto err_dpdmai_setup;
 687         }
 688
 689         /* DPIO */
 690         err = dpaa2_qdma_dpio_setup(priv);
 691         if (err) {
 692                 dev_err(dev, "dpaa2_dpdmai_dpio_setup() failed\n");
 693                 goto err_dpio_setup;
 694         }
 695
 696         /* DPDMAI binding to DPIO */
 697         err = dpaa2_dpdmai_bind(priv);
 698         if (err) {
 699                 dev_err(dev, "dpaa2_dpdmai_bind() failed\n");
 700                 goto err_bind;
 701         }
 702
 703         /* DPDMAI enable */
 704         err = dpdmai_enable(priv->mc_io, 0, dpdmai_dev->mc_handle);
 705         if (err) {
 706                 dev_err(dev, "dpdmai_enable() failed\n");
 707                 goto err_enable;
 708         }
 709
 710         dpaa2_qdma = kzalloc(sizeof(*dpaa2_qdma), GFP_KERNEL);
 711         if (!dpaa2_qdma) {
 712                 err = -ENOMEM;
 713                 goto err_eng;
 714         }
 715
 716         priv->dpaa2_qdma = dpaa2_qdma;
 717         dpaa2_qdma->priv = priv;
 718
 719         dpaa2_qdma->desc_allocated = 0;
 720         dpaa2_qdma->n_chans = NUM_CH;
 721
 722         dpaa2_dpdmai_init_channels(dpaa2_qdma);
 723
 724         if (soc_device_match(soc_fixup_tuning))
 725                 dpaa2_qdma->qdma_wrtype_fixup = true;
 726         else
 727                 dpaa2_qdma->qdma_wrtype_fixup = false;
 728
 729         dma_cap_set(DMA_PRIVATE, dpaa2_qdma->dma_dev.cap_mask);
 730         dma_cap_set(DMA_SLAVE, dpaa2_qdma->dma_dev.cap_mask);
 731         dma_cap_set(DMA_MEMCPY, dpaa2_qdma->dma_dev.cap_mask);
 732
 733         dpaa2_qdma->dma_dev.dev = dev;
 734         dpaa2_qdma->dma_dev.device_alloc_chan_resources =
 735                 dpaa2_qdma_alloc_chan_resources;
 736         dpaa2_qdma->dma_dev.device_free_chan_resources =
 737                 dpaa2_qdma_free_chan_resources;
 738         dpaa2_qdma->dma_dev.device_tx_status = dma_cookie_status;
 739         dpaa2_qdma->dma_dev.device_prep_dma_memcpy = dpaa2_qdma_prep_memcpy;
 740         dpaa2_qdma->dma_dev.device_issue_pending = dpaa2_qdma_issue_pending;
 741
 742         err = dma_async_device_register(&dpaa2_qdma->dma_dev);
 743         if (err) {
 744                 dev_err(dev, "Can't register NXP QDMA engine.\n");
 745                 goto err_dpaa2_qdma;
 746         }
 747
 748         return 0;
 749
 750 err_dpaa2_qdma:
 751         kfree(dpaa2_qdma);
 752 err_eng:
 753         dpdmai_disable(priv->mc_io, 0, dpdmai_dev->mc_handle);
 754 err_enable:
 755         dpaa2_dpdmai_dpio_unbind(priv);
 756 err_bind:
 757         dpaa2_dpmai_store_free(priv);
 758         dpaa2_dpdmai_dpio_free(priv);
 759 err_dpio_setup:
 760         kfree(priv->ppriv);
 761         dpdmai_close(priv->mc_io, 0, dpdmai_dev->mc_handle);
 762 err_dpdmai_setup:
 763         fsl_mc_portal_free(priv->mc_io);
 764 err_mcportal:
 765         kfree(priv);
 766         dev_set_drvdata(dev, NULL);
 767         return err;
 768 }
 769
 770 static void dpaa2_qdma_remove(struct fsl_mc_device *ls_dev)
 771 {
 772         struct dpaa2_qdma_engine *dpaa2_qdma;
 773         struct dpaa2_qdma_priv *priv;
 774         struct device *dev;
 775
 776         dev = &ls_dev->dev;
 777         priv = dev_get_drvdata(dev);
 778         dpaa2_qdma = priv->dpaa2_qdma;
 779
 780         dpdmai_disable(priv->mc_io, 0, ls_dev->mc_handle);
 781         dpaa2_dpdmai_dpio_unbind(priv);
 782         dpaa2_dpmai_store_free(priv);
 783         dpaa2_dpdmai_dpio_free(priv);
 784         dpdmai_close(priv->mc_io, 0, ls_dev->mc_handle);
 785         fsl_mc_portal_free(priv->mc_io);
 786         dev_set_drvdata(dev, NULL);
 787         dpaa2_dpdmai_free_channels(dpaa2_qdma);
 788
 789         dma_async_device_unregister(&dpaa2_qdma->dma_dev);
 790         kfree(priv);
 791         kfree(dpaa2_qdma);
 792 }
 793
 794 static void dpaa2_qdma_shutdown(struct fsl_mc_device *ls_dev)
 795 {
 796         struct dpaa2_qdma_priv *priv;
 797         struct device *dev;
 798
 799         dev = &ls_dev->dev;
 800         priv = dev_get_drvdata(dev);
 801
 802         dpdmai_disable(priv->mc_io, 0, ls_dev->mc_handle);
 803         dpaa2_dpdmai_dpio_unbind(priv);
 804         dpdmai_close(priv->mc_io, 0, ls_dev->mc_handle);
 805         dpdmai_destroy(priv->mc_io, 0, ls_dev->mc_handle);
 806 }
 807
 808 static const struct fsl_mc_device_id dpaa2_qdma_id_table[] = {
 809         {
 810                 .vendor = FSL_MC_VENDOR_FREESCALE,
 811                 .obj_type = "dpdmai",
 812         },
 813         { .vendor = 0x0 }
 814 };
 815
 816 static struct fsl_mc_driver dpaa2_qdma_driver = {
 817         .driver         = {
 818                 .name   = "dpaa2-qdma",
 819         },
 820         .probe          = dpaa2_qdma_probe,
 821         .remove         = dpaa2_qdma_remove,
 822         .shutdown       = dpaa2_qdma_shutdown,
 823         .match_id_table = dpaa2_qdma_id_table
 824 };
 825
 826 static int __init dpaa2_qdma_driver_init(void)
 827 {
 828         return fsl_mc_driver_register(&(dpaa2_qdma_driver));
 829 }
 830 late_initcall(dpaa2_qdma_driver_init);
 831
 832 static void __exit fsl_qdma_exit(void)
 833 {
 834         fsl_mc_driver_unregister(&(dpaa2_qdma_driver));
 835 }
 836 module_exit(fsl_qdma_exit);
 837
 838 MODULE_ALIAS("platform:fsl-dpaa2-qdma");
 839 MODULE_LICENSE("GPL v2");
 840 MODULE_DESCRIPTION("NXP Layerscape DPAA2 qDMA engine driver");