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"); 841