1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2017 - 2018 Intel Corporation 4 * Copyright 2017 Google LLC 5 * 6 * Based on Intel IPU4 driver. 7 * 8 */ 9 10 #include <linux/delay.h> 11 #include <linux/interrupt.h> 12 #include <linux/module.h> 13 #include <linux/pm_runtime.h> 14 15 #include "ipu3.h" 16 #include "ipu3-dmamap.h" 17 #include "ipu3-mmu.h" 18 19 #define IMGU_PCI_ID 0x1919 20 #define IMGU_PCI_BAR 0 21 #define IMGU_DMA_MASK DMA_BIT_MASK(39) 22 #define IMGU_MAX_QUEUE_DEPTH (2 + 2) 23 24 /* 25 * pre-allocated buffer size for IMGU dummy buffers. Those 26 * values should be tuned to big enough to avoid buffer 27 * re-allocation when streaming to lower streaming latency. 28 */ 29 #define CSS_QUEUE_IN_BUF_SIZE 0 30 #define CSS_QUEUE_PARAMS_BUF_SIZE 0 31 #define CSS_QUEUE_OUT_BUF_SIZE (4160 * 3120 * 12 / 8) 32 #define CSS_QUEUE_VF_BUF_SIZE (1920 * 1080 * 12 / 8) 33 #define CSS_QUEUE_STAT_3A_BUF_SIZE sizeof(struct ipu3_uapi_stats_3a) 34 35 static const size_t css_queue_buf_size_map[IPU3_CSS_QUEUES] = { 36 [IPU3_CSS_QUEUE_IN] = CSS_QUEUE_IN_BUF_SIZE, 37 [IPU3_CSS_QUEUE_PARAMS] = CSS_QUEUE_PARAMS_BUF_SIZE, 38 [IPU3_CSS_QUEUE_OUT] = CSS_QUEUE_OUT_BUF_SIZE, 39 [IPU3_CSS_QUEUE_VF] = CSS_QUEUE_VF_BUF_SIZE, 40 [IPU3_CSS_QUEUE_STAT_3A] = CSS_QUEUE_STAT_3A_BUF_SIZE, 41 }; 42 43 static const struct imgu_node_mapping imgu_node_map[IMGU_NODE_NUM] = { 44 [IMGU_NODE_IN] = {IPU3_CSS_QUEUE_IN, "input"}, 45 [IMGU_NODE_PARAMS] = {IPU3_CSS_QUEUE_PARAMS, "parameters"}, 46 [IMGU_NODE_OUT] = {IPU3_CSS_QUEUE_OUT, "output"}, 47 [IMGU_NODE_VF] = {IPU3_CSS_QUEUE_VF, "viewfinder"}, 48 [IMGU_NODE_STAT_3A] = {IPU3_CSS_QUEUE_STAT_3A, "3a stat"}, 49 }; 50 51 unsigned int imgu_node_to_queue(unsigned int node) 52 { 53 return imgu_node_map[node].css_queue; 54 } 55 56 unsigned int imgu_map_node(struct imgu_device *imgu, unsigned int css_queue) 57 { 58 unsigned int i; 59 60 for (i = 0; i < IMGU_NODE_NUM; i++) 61 if (imgu_node_map[i].css_queue == css_queue) 62 break; 63 64 return i; 65 } 66 67 /**************** Dummy buffers ****************/ 68 69 static void imgu_dummybufs_cleanup(struct imgu_device *imgu, unsigned int pipe) 70 { 71 unsigned int i; 72 struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[pipe]; 73 74 for (i = 0; i < IPU3_CSS_QUEUES; i++) 75 imgu_dmamap_free(imgu, 76 &imgu_pipe->queues[i].dmap); 77 } 78 79 static int imgu_dummybufs_preallocate(struct imgu_device *imgu, 80 unsigned int pipe) 81 { 82 unsigned int i; 83 size_t size; 84 struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[pipe]; 85 86 for (i = 0; i < IPU3_CSS_QUEUES; i++) { 87 size = css_queue_buf_size_map[i]; 88 /* 89 * Do not enable dummy buffers for master queue, 90 * always require that real buffers from user are 91 * available. 92 */ 93 if (i == IMGU_QUEUE_MASTER || size == 0) 94 continue; 95 96 if (!imgu_dmamap_alloc(imgu, 97 &imgu_pipe->queues[i].dmap, size)) { 98 imgu_dummybufs_cleanup(imgu, pipe); 99 return -ENOMEM; 100 } 101 } 102 103 return 0; 104 } 105 106 static int imgu_dummybufs_init(struct imgu_device *imgu, unsigned int pipe) 107 { 108 const struct v4l2_pix_format_mplane *mpix; 109 const struct v4l2_meta_format *meta; 110 unsigned int i, k, node; 111 size_t size; 112 struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[pipe]; 113 114 /* Allocate a dummy buffer for each queue where buffer is optional */ 115 for (i = 0; i < IPU3_CSS_QUEUES; i++) { 116 node = imgu_map_node(imgu, i); 117 if (!imgu_pipe->queue_enabled[node] || i == IMGU_QUEUE_MASTER) 118 continue; 119 120 if (!imgu_pipe->nodes[IMGU_NODE_VF].enabled && 121 i == IPU3_CSS_QUEUE_VF) 122 /* 123 * Do not enable dummy buffers for VF if it is not 124 * requested by the user. 125 */ 126 continue; 127 128 meta = &imgu_pipe->nodes[node].vdev_fmt.fmt.meta; 129 mpix = &imgu_pipe->nodes[node].vdev_fmt.fmt.pix_mp; 130 131 if (node == IMGU_NODE_STAT_3A || node == IMGU_NODE_PARAMS) 132 size = meta->buffersize; 133 else 134 size = mpix->plane_fmt[0].sizeimage; 135 136 if (imgu_css_dma_buffer_resize(imgu, 137 &imgu_pipe->queues[i].dmap, 138 size)) { 139 imgu_dummybufs_cleanup(imgu, pipe); 140 return -ENOMEM; 141 } 142 143 for (k = 0; k < IMGU_MAX_QUEUE_DEPTH; k++) 144 imgu_css_buf_init(&imgu_pipe->queues[i].dummybufs[k], i, 145 imgu_pipe->queues[i].dmap.daddr); 146 } 147 148 return 0; 149 } 150 151 /* May be called from atomic context */ 152 static struct imgu_css_buffer *imgu_dummybufs_get(struct imgu_device *imgu, 153 int queue, unsigned int pipe) 154 { 155 unsigned int i; 156 struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[pipe]; 157 158 /* dummybufs are not allocated for master q */ 159 if (queue == IPU3_CSS_QUEUE_IN) 160 return NULL; 161 162 if (WARN_ON(!imgu_pipe->queues[queue].dmap.vaddr)) 163 /* Buffer should not be allocated here */ 164 return NULL; 165 166 for (i = 0; i < IMGU_MAX_QUEUE_DEPTH; i++) 167 if (imgu_css_buf_state(&imgu_pipe->queues[queue].dummybufs[i]) != 168 IPU3_CSS_BUFFER_QUEUED) 169 break; 170 171 if (i == IMGU_MAX_QUEUE_DEPTH) 172 return NULL; 173 174 imgu_css_buf_init(&imgu_pipe->queues[queue].dummybufs[i], queue, 175 imgu_pipe->queues[queue].dmap.daddr); 176 177 return &imgu_pipe->queues[queue].dummybufs[i]; 178 } 179 180 /* Check if given buffer is a dummy buffer */ 181 static bool imgu_dummybufs_check(struct imgu_device *imgu, 182 struct imgu_css_buffer *buf, 183 unsigned int pipe) 184 { 185 unsigned int i; 186 struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[pipe]; 187 188 for (i = 0; i < IMGU_MAX_QUEUE_DEPTH; i++) 189 if (buf == &imgu_pipe->queues[buf->queue].dummybufs[i]) 190 break; 191 192 return i < IMGU_MAX_QUEUE_DEPTH; 193 } 194 195 static void imgu_buffer_done(struct imgu_device *imgu, struct vb2_buffer *vb, 196 enum vb2_buffer_state state) 197 { 198 mutex_lock(&imgu->lock); 199 imgu_v4l2_buffer_done(vb, state); 200 mutex_unlock(&imgu->lock); 201 } 202 203 static struct imgu_css_buffer *imgu_queue_getbuf(struct imgu_device *imgu, 204 unsigned int node, 205 unsigned int pipe) 206 { 207 struct imgu_buffer *buf; 208 struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[pipe]; 209 210 if (WARN_ON(node >= IMGU_NODE_NUM)) 211 return NULL; 212 213 /* Find first free buffer from the node */ 214 list_for_each_entry(buf, &imgu_pipe->nodes[node].buffers, vid_buf.list) { 215 if (imgu_css_buf_state(&buf->css_buf) == IPU3_CSS_BUFFER_NEW) 216 return &buf->css_buf; 217 } 218 219 /* There were no free buffers, try to return a dummy buffer */ 220 return imgu_dummybufs_get(imgu, imgu_node_map[node].css_queue, pipe); 221 } 222 223 /* 224 * Queue as many buffers to CSS as possible. If all buffers don't fit into 225 * CSS buffer queues, they remain unqueued and will be queued later. 226 */ 227 int imgu_queue_buffers(struct imgu_device *imgu, bool initial, unsigned int pipe) 228 { 229 unsigned int node; 230 int r = 0; 231 struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[pipe]; 232 233 if (!imgu_css_is_streaming(&imgu->css)) 234 return 0; 235 236 dev_dbg(&imgu->pci_dev->dev, "Queue buffers to pipe %d", pipe); 237 mutex_lock(&imgu->lock); 238 239 if (!imgu_css_pipe_queue_empty(&imgu->css, pipe)) { 240 mutex_unlock(&imgu->lock); 241 return 0; 242 } 243 244 /* Buffer set is queued to FW only when input buffer is ready */ 245 for (node = IMGU_NODE_NUM - 1; 246 imgu_queue_getbuf(imgu, IMGU_NODE_IN, pipe); 247 node = node ? node - 1 : IMGU_NODE_NUM - 1) { 248 if (node == IMGU_NODE_VF && 249 !imgu_pipe->nodes[IMGU_NODE_VF].enabled) { 250 dev_warn(&imgu->pci_dev->dev, 251 "Vf not enabled, ignore queue"); 252 continue; 253 } else if (node == IMGU_NODE_PARAMS && 254 imgu_pipe->nodes[node].enabled) { 255 struct vb2_buffer *vb; 256 struct imgu_vb2_buffer *ivb; 257 258 /* No parameters for this frame */ 259 if (list_empty(&imgu_pipe->nodes[node].buffers)) 260 continue; 261 262 ivb = list_first_entry(&imgu_pipe->nodes[node].buffers, 263 struct imgu_vb2_buffer, list); 264 list_del(&ivb->list); 265 vb = &ivb->vbb.vb2_buf; 266 r = imgu_css_set_parameters(&imgu->css, pipe, 267 vb2_plane_vaddr(vb, 0)); 268 if (r) { 269 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); 270 dev_warn(&imgu->pci_dev->dev, 271 "set parameters failed."); 272 continue; 273 } 274 275 vb2_buffer_done(vb, VB2_BUF_STATE_DONE); 276 dev_dbg(&imgu->pci_dev->dev, 277 "queue user parameters %d to css.", vb->index); 278 } else if (imgu_pipe->queue_enabled[node]) { 279 struct imgu_css_buffer *buf = 280 imgu_queue_getbuf(imgu, node, pipe); 281 struct imgu_buffer *ibuf = NULL; 282 bool dummy; 283 284 if (!buf) 285 break; 286 287 r = imgu_css_buf_queue(&imgu->css, pipe, buf); 288 if (r) 289 break; 290 dummy = imgu_dummybufs_check(imgu, buf, pipe); 291 if (!dummy) 292 ibuf = container_of(buf, struct imgu_buffer, 293 css_buf); 294 dev_dbg(&imgu->pci_dev->dev, 295 "queue %s %s buffer %u to css da: 0x%08x\n", 296 dummy ? "dummy" : "user", 297 imgu_node_map[node].name, 298 dummy ? 0 : ibuf->vid_buf.vbb.vb2_buf.index, 299 (u32)buf->daddr); 300 } 301 } 302 mutex_unlock(&imgu->lock); 303 304 if (r && r != -EBUSY) 305 goto failed; 306 307 return 0; 308 309 failed: 310 /* 311 * On error, mark all buffers as failed which are not 312 * yet queued to CSS 313 */ 314 dev_err(&imgu->pci_dev->dev, 315 "failed to queue buffer to CSS on queue %i (%d)\n", 316 node, r); 317 318 if (initial) 319 /* If we were called from streamon(), no need to finish bufs */ 320 return r; 321 322 for (node = 0; node < IMGU_NODE_NUM; node++) { 323 struct imgu_buffer *buf, *buf0; 324 325 if (!imgu_pipe->queue_enabled[node]) 326 continue; /* Skip disabled queues */ 327 328 mutex_lock(&imgu->lock); 329 list_for_each_entry_safe(buf, buf0, 330 &imgu_pipe->nodes[node].buffers, 331 vid_buf.list) { 332 if (imgu_css_buf_state(&buf->css_buf) == 333 IPU3_CSS_BUFFER_QUEUED) 334 continue; /* Was already queued, skip */ 335 336 imgu_v4l2_buffer_done(&buf->vid_buf.vbb.vb2_buf, 337 VB2_BUF_STATE_ERROR); 338 } 339 mutex_unlock(&imgu->lock); 340 } 341 342 return r; 343 } 344 345 static int imgu_powerup(struct imgu_device *imgu) 346 { 347 int r; 348 unsigned int pipe; 349 unsigned int freq = 200; 350 struct v4l2_mbus_framefmt *fmt; 351 352 /* input larger than 2048*1152, ask imgu to work on high freq */ 353 for_each_set_bit(pipe, imgu->css.enabled_pipes, IMGU_MAX_PIPE_NUM) { 354 fmt = &imgu->imgu_pipe[pipe].nodes[IMGU_NODE_IN].pad_fmt; 355 dev_dbg(&imgu->pci_dev->dev, "pipe %u input format = %ux%u", 356 pipe, fmt->width, fmt->height); 357 if ((fmt->width * fmt->height) >= (2048 * 1152)) 358 freq = 450; 359 } 360 361 r = imgu_css_set_powerup(&imgu->pci_dev->dev, imgu->base, freq); 362 if (r) 363 return r; 364 365 imgu_mmu_resume(imgu->mmu); 366 return 0; 367 } 368 369 static void imgu_powerdown(struct imgu_device *imgu) 370 { 371 imgu_mmu_suspend(imgu->mmu); 372 imgu_css_set_powerdown(&imgu->pci_dev->dev, imgu->base); 373 } 374 375 int imgu_s_stream(struct imgu_device *imgu, int enable) 376 { 377 struct device *dev = &imgu->pci_dev->dev; 378 int r, pipe; 379 380 if (!enable) { 381 /* Stop streaming */ 382 dev_dbg(dev, "stream off\n"); 383 /* Block new buffers to be queued to CSS. */ 384 atomic_set(&imgu->qbuf_barrier, 1); 385 imgu_css_stop_streaming(&imgu->css); 386 synchronize_irq(imgu->pci_dev->irq); 387 atomic_set(&imgu->qbuf_barrier, 0); 388 imgu_powerdown(imgu); 389 pm_runtime_put(&imgu->pci_dev->dev); 390 391 return 0; 392 } 393 394 /* Set Power */ 395 r = pm_runtime_resume_and_get(dev); 396 if (r < 0) { 397 dev_err(dev, "failed to set imgu power\n"); 398 return r; 399 } 400 401 r = imgu_powerup(imgu); 402 if (r) { 403 dev_err(dev, "failed to power up imgu\n"); 404 pm_runtime_put(dev); 405 return r; 406 } 407 408 /* Start CSS streaming */ 409 r = imgu_css_start_streaming(&imgu->css); 410 if (r) { 411 dev_err(dev, "failed to start css streaming (%d)", r); 412 goto fail_start_streaming; 413 } 414 415 for_each_set_bit(pipe, imgu->css.enabled_pipes, IMGU_MAX_PIPE_NUM) { 416 /* Initialize dummy buffers */ 417 r = imgu_dummybufs_init(imgu, pipe); 418 if (r) { 419 dev_err(dev, "failed to initialize dummy buffers (%d)", r); 420 goto fail_dummybufs; 421 } 422 423 /* Queue as many buffers from queue as possible */ 424 r = imgu_queue_buffers(imgu, true, pipe); 425 if (r) { 426 dev_err(dev, "failed to queue initial buffers (%d)", r); 427 goto fail_queueing; 428 } 429 } 430 431 return 0; 432 fail_queueing: 433 for_each_set_bit(pipe, imgu->css.enabled_pipes, IMGU_MAX_PIPE_NUM) 434 imgu_dummybufs_cleanup(imgu, pipe); 435 fail_dummybufs: 436 imgu_css_stop_streaming(&imgu->css); 437 fail_start_streaming: 438 pm_runtime_put(dev); 439 440 return r; 441 } 442 443 static void imgu_video_nodes_exit(struct imgu_device *imgu) 444 { 445 int i; 446 447 for (i = 0; i < IMGU_MAX_PIPE_NUM; i++) 448 imgu_dummybufs_cleanup(imgu, i); 449 450 imgu_v4l2_unregister(imgu); 451 } 452 453 static int imgu_video_nodes_init(struct imgu_device *imgu) 454 { 455 struct v4l2_pix_format_mplane *fmts[IPU3_CSS_QUEUES] = { NULL }; 456 struct v4l2_rect *rects[IPU3_CSS_RECTS] = { NULL }; 457 struct imgu_media_pipe *imgu_pipe; 458 unsigned int i, j; 459 int r; 460 461 imgu->buf_struct_size = sizeof(struct imgu_buffer); 462 463 for (j = 0; j < IMGU_MAX_PIPE_NUM; j++) { 464 imgu_pipe = &imgu->imgu_pipe[j]; 465 466 for (i = 0; i < IMGU_NODE_NUM; i++) { 467 imgu_pipe->nodes[i].name = imgu_node_map[i].name; 468 imgu_pipe->nodes[i].output = i < IMGU_QUEUE_FIRST_INPUT; 469 imgu_pipe->nodes[i].enabled = false; 470 471 if (i != IMGU_NODE_PARAMS && i != IMGU_NODE_STAT_3A) 472 fmts[imgu_node_map[i].css_queue] = 473 &imgu_pipe->nodes[i].vdev_fmt.fmt.pix_mp; 474 atomic_set(&imgu_pipe->nodes[i].sequence, 0); 475 } 476 } 477 478 r = imgu_v4l2_register(imgu); 479 if (r) 480 return r; 481 482 /* Set initial formats and initialize formats of video nodes */ 483 for (j = 0; j < IMGU_MAX_PIPE_NUM; j++) { 484 imgu_pipe = &imgu->imgu_pipe[j]; 485 486 rects[IPU3_CSS_RECT_EFFECTIVE] = &imgu_pipe->imgu_sd.rect.eff; 487 rects[IPU3_CSS_RECT_BDS] = &imgu_pipe->imgu_sd.rect.bds; 488 imgu_css_fmt_set(&imgu->css, fmts, rects, j); 489 490 /* Pre-allocate dummy buffers */ 491 r = imgu_dummybufs_preallocate(imgu, j); 492 if (r) { 493 dev_err(&imgu->pci_dev->dev, 494 "failed to pre-allocate dummy buffers (%d)", r); 495 goto out_cleanup; 496 } 497 } 498 499 return 0; 500 501 out_cleanup: 502 imgu_video_nodes_exit(imgu); 503 504 return r; 505 } 506 507 /**************** PCI interface ****************/ 508 509 static irqreturn_t imgu_isr_threaded(int irq, void *imgu_ptr) 510 { 511 struct imgu_device *imgu = imgu_ptr; 512 struct imgu_media_pipe *imgu_pipe; 513 int p; 514 515 /* Dequeue / queue buffers */ 516 do { 517 u64 ns = ktime_get_ns(); 518 struct imgu_css_buffer *b; 519 struct imgu_buffer *buf = NULL; 520 unsigned int node, pipe; 521 bool dummy; 522 523 do { 524 mutex_lock(&imgu->lock); 525 b = imgu_css_buf_dequeue(&imgu->css); 526 mutex_unlock(&imgu->lock); 527 } while (PTR_ERR(b) == -EAGAIN); 528 529 if (IS_ERR(b)) { 530 if (PTR_ERR(b) != -EBUSY) /* All done */ 531 dev_err(&imgu->pci_dev->dev, 532 "failed to dequeue buffers (%ld)\n", 533 PTR_ERR(b)); 534 break; 535 } 536 537 node = imgu_map_node(imgu, b->queue); 538 pipe = b->pipe; 539 dummy = imgu_dummybufs_check(imgu, b, pipe); 540 if (!dummy) 541 buf = container_of(b, struct imgu_buffer, css_buf); 542 dev_dbg(&imgu->pci_dev->dev, 543 "dequeue %s %s buffer %d daddr 0x%x from css\n", 544 dummy ? "dummy" : "user", 545 imgu_node_map[node].name, 546 dummy ? 0 : buf->vid_buf.vbb.vb2_buf.index, 547 (u32)b->daddr); 548 549 if (dummy) 550 /* It was a dummy buffer, skip it */ 551 continue; 552 553 /* Fill vb2 buffer entries and tell it's ready */ 554 imgu_pipe = &imgu->imgu_pipe[pipe]; 555 if (!imgu_pipe->nodes[node].output) { 556 buf->vid_buf.vbb.vb2_buf.timestamp = ns; 557 buf->vid_buf.vbb.field = V4L2_FIELD_NONE; 558 buf->vid_buf.vbb.sequence = 559 atomic_inc_return( 560 &imgu_pipe->nodes[node].sequence); 561 dev_dbg(&imgu->pci_dev->dev, "vb2 buffer sequence %d", 562 buf->vid_buf.vbb.sequence); 563 } 564 imgu_buffer_done(imgu, &buf->vid_buf.vbb.vb2_buf, 565 imgu_css_buf_state(&buf->css_buf) == 566 IPU3_CSS_BUFFER_DONE ? 567 VB2_BUF_STATE_DONE : 568 VB2_BUF_STATE_ERROR); 569 mutex_lock(&imgu->lock); 570 if (imgu_css_queue_empty(&imgu->css)) 571 wake_up_all(&imgu->buf_drain_wq); 572 mutex_unlock(&imgu->lock); 573 } while (1); 574 575 /* 576 * Try to queue more buffers for CSS. 577 * qbuf_barrier is used to disable new buffers 578 * to be queued to CSS. 579 */ 580 if (!atomic_read(&imgu->qbuf_barrier)) 581 for_each_set_bit(p, imgu->css.enabled_pipes, IMGU_MAX_PIPE_NUM) 582 imgu_queue_buffers(imgu, false, p); 583 584 return IRQ_HANDLED; 585 } 586 587 static irqreturn_t imgu_isr(int irq, void *imgu_ptr) 588 { 589 struct imgu_device *imgu = imgu_ptr; 590 591 /* acknowledge interruption */ 592 if (imgu_css_irq_ack(&imgu->css) < 0) 593 return IRQ_NONE; 594 595 return IRQ_WAKE_THREAD; 596 } 597 598 static int imgu_pci_config_setup(struct pci_dev *dev) 599 { 600 u16 pci_command; 601 int r = pci_enable_msi(dev); 602 603 if (r) { 604 dev_err(&dev->dev, "failed to enable MSI (%d)\n", r); 605 return r; 606 } 607 608 pci_read_config_word(dev, PCI_COMMAND, &pci_command); 609 pci_command |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 610 PCI_COMMAND_INTX_DISABLE; 611 pci_write_config_word(dev, PCI_COMMAND, pci_command); 612 613 return 0; 614 } 615 616 static int imgu_pci_probe(struct pci_dev *pci_dev, 617 const struct pci_device_id *id) 618 { 619 struct imgu_device *imgu; 620 phys_addr_t phys; 621 unsigned long phys_len; 622 void __iomem *const *iomap; 623 int r; 624 625 imgu = devm_kzalloc(&pci_dev->dev, sizeof(*imgu), GFP_KERNEL); 626 if (!imgu) 627 return -ENOMEM; 628 629 imgu->pci_dev = pci_dev; 630 631 r = pcim_enable_device(pci_dev); 632 if (r) { 633 dev_err(&pci_dev->dev, "failed to enable device (%d)\n", r); 634 return r; 635 } 636 637 dev_info(&pci_dev->dev, "device 0x%x (rev: 0x%x)\n", 638 pci_dev->device, pci_dev->revision); 639 640 phys = pci_resource_start(pci_dev, IMGU_PCI_BAR); 641 phys_len = pci_resource_len(pci_dev, IMGU_PCI_BAR); 642 643 r = pcim_iomap_regions(pci_dev, 1 << IMGU_PCI_BAR, pci_name(pci_dev)); 644 if (r) { 645 dev_err(&pci_dev->dev, "failed to remap I/O memory (%d)\n", r); 646 return r; 647 } 648 dev_info(&pci_dev->dev, "physical base address %pap, %lu bytes\n", 649 &phys, phys_len); 650 651 iomap = pcim_iomap_table(pci_dev); 652 if (!iomap) { 653 dev_err(&pci_dev->dev, "failed to iomap table\n"); 654 return -ENODEV; 655 } 656 657 imgu->base = iomap[IMGU_PCI_BAR]; 658 659 pci_set_drvdata(pci_dev, imgu); 660 661 pci_set_master(pci_dev); 662 663 r = dma_coerce_mask_and_coherent(&pci_dev->dev, IMGU_DMA_MASK); 664 if (r) { 665 dev_err(&pci_dev->dev, "failed to set DMA mask (%d)\n", r); 666 return -ENODEV; 667 } 668 669 r = imgu_pci_config_setup(pci_dev); 670 if (r) 671 return r; 672 673 mutex_init(&imgu->lock); 674 mutex_init(&imgu->streaming_lock); 675 atomic_set(&imgu->qbuf_barrier, 0); 676 init_waitqueue_head(&imgu->buf_drain_wq); 677 678 r = imgu_css_set_powerup(&pci_dev->dev, imgu->base, 200); 679 if (r) { 680 dev_err(&pci_dev->dev, 681 "failed to power up CSS (%d)\n", r); 682 goto out_mutex_destroy; 683 } 684 685 imgu->mmu = imgu_mmu_init(&pci_dev->dev, imgu->base); 686 if (IS_ERR(imgu->mmu)) { 687 r = PTR_ERR(imgu->mmu); 688 dev_err(&pci_dev->dev, "failed to initialize MMU (%d)\n", r); 689 goto out_css_powerdown; 690 } 691 692 r = imgu_dmamap_init(imgu); 693 if (r) { 694 dev_err(&pci_dev->dev, 695 "failed to initialize DMA mapping (%d)\n", r); 696 goto out_mmu_exit; 697 } 698 699 /* ISP programming */ 700 r = imgu_css_init(&pci_dev->dev, &imgu->css, imgu->base, phys_len); 701 if (r) { 702 dev_err(&pci_dev->dev, "failed to initialize CSS (%d)\n", r); 703 goto out_dmamap_exit; 704 } 705 706 /* v4l2 sub-device registration */ 707 r = imgu_video_nodes_init(imgu); 708 if (r) { 709 dev_err(&pci_dev->dev, "failed to create V4L2 devices (%d)\n", 710 r); 711 goto out_css_cleanup; 712 } 713 714 r = devm_request_threaded_irq(&pci_dev->dev, pci_dev->irq, 715 imgu_isr, imgu_isr_threaded, 716 IRQF_SHARED, IMGU_NAME, imgu); 717 if (r) { 718 dev_err(&pci_dev->dev, "failed to request IRQ (%d)\n", r); 719 goto out_video_exit; 720 } 721 722 pm_runtime_put_noidle(&pci_dev->dev); 723 pm_runtime_allow(&pci_dev->dev); 724 725 return 0; 726 727 out_video_exit: 728 imgu_video_nodes_exit(imgu); 729 out_css_cleanup: 730 imgu_css_cleanup(&imgu->css); 731 out_dmamap_exit: 732 imgu_dmamap_exit(imgu); 733 out_mmu_exit: 734 imgu_mmu_exit(imgu->mmu); 735 out_css_powerdown: 736 imgu_css_set_powerdown(&pci_dev->dev, imgu->base); 737 out_mutex_destroy: 738 mutex_destroy(&imgu->streaming_lock); 739 mutex_destroy(&imgu->lock); 740 741 return r; 742 } 743 744 static void imgu_pci_remove(struct pci_dev *pci_dev) 745 { 746 struct imgu_device *imgu = pci_get_drvdata(pci_dev); 747 748 pm_runtime_forbid(&pci_dev->dev); 749 pm_runtime_get_noresume(&pci_dev->dev); 750 751 imgu_video_nodes_exit(imgu); 752 imgu_css_cleanup(&imgu->css); 753 imgu_css_set_powerdown(&pci_dev->dev, imgu->base); 754 imgu_dmamap_exit(imgu); 755 imgu_mmu_exit(imgu->mmu); 756 mutex_destroy(&imgu->streaming_lock); 757 mutex_destroy(&imgu->lock); 758 } 759 760 static int __maybe_unused imgu_suspend(struct device *dev) 761 { 762 struct pci_dev *pci_dev = to_pci_dev(dev); 763 struct imgu_device *imgu = pci_get_drvdata(pci_dev); 764 765 dev_dbg(dev, "enter %s\n", __func__); 766 imgu->suspend_in_stream = imgu_css_is_streaming(&imgu->css); 767 if (!imgu->suspend_in_stream) 768 goto out; 769 /* Block new buffers to be queued to CSS. */ 770 atomic_set(&imgu->qbuf_barrier, 1); 771 /* 772 * Wait for currently running irq handler to be done so that 773 * no new buffers will be queued to fw later. 774 */ 775 synchronize_irq(pci_dev->irq); 776 /* Wait until all buffers in CSS are done. */ 777 if (!wait_event_timeout(imgu->buf_drain_wq, 778 imgu_css_queue_empty(&imgu->css), msecs_to_jiffies(1000))) 779 dev_err(dev, "wait buffer drain timeout.\n"); 780 781 imgu_css_stop_streaming(&imgu->css); 782 atomic_set(&imgu->qbuf_barrier, 0); 783 imgu_powerdown(imgu); 784 pm_runtime_force_suspend(dev); 785 out: 786 dev_dbg(dev, "leave %s\n", __func__); 787 return 0; 788 } 789 790 static int __maybe_unused imgu_resume(struct device *dev) 791 { 792 struct imgu_device *imgu = dev_get_drvdata(dev); 793 int r = 0; 794 unsigned int pipe; 795 796 dev_dbg(dev, "enter %s\n", __func__); 797 798 if (!imgu->suspend_in_stream) 799 goto out; 800 801 pm_runtime_force_resume(dev); 802 803 r = imgu_powerup(imgu); 804 if (r) { 805 dev_err(dev, "failed to power up imgu\n"); 806 goto out; 807 } 808 809 /* Start CSS streaming */ 810 r = imgu_css_start_streaming(&imgu->css); 811 if (r) { 812 dev_err(dev, "failed to resume css streaming (%d)", r); 813 goto out; 814 } 815 816 for_each_set_bit(pipe, imgu->css.enabled_pipes, IMGU_MAX_PIPE_NUM) { 817 r = imgu_queue_buffers(imgu, true, pipe); 818 if (r) 819 dev_err(dev, "failed to queue buffers to pipe %d (%d)", 820 pipe, r); 821 } 822 823 out: 824 dev_dbg(dev, "leave %s\n", __func__); 825 826 return r; 827 } 828 829 /* 830 * PCI rpm framework checks the existence of driver rpm callbacks. 831 * Place a dummy callback here to avoid rpm going into error state. 832 */ 833 static __maybe_unused int imgu_rpm_dummy_cb(struct device *dev) 834 { 835 return 0; 836 } 837 838 static const struct dev_pm_ops imgu_pm_ops = { 839 SET_RUNTIME_PM_OPS(&imgu_rpm_dummy_cb, &imgu_rpm_dummy_cb, NULL) 840 SET_SYSTEM_SLEEP_PM_OPS(&imgu_suspend, &imgu_resume) 841 }; 842 843 static const struct pci_device_id imgu_pci_tbl[] = { 844 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, IMGU_PCI_ID) }, 845 { 0, } 846 }; 847 848 MODULE_DEVICE_TABLE(pci, imgu_pci_tbl); 849 850 static struct pci_driver imgu_pci_driver = { 851 .name = IMGU_NAME, 852 .id_table = imgu_pci_tbl, 853 .probe = imgu_pci_probe, 854 .remove = imgu_pci_remove, 855 .driver = { 856 .pm = &imgu_pm_ops, 857 }, 858 }; 859 860 module_pci_driver(imgu_pci_driver); 861 862 MODULE_AUTHOR("Tuukka Toivonen <tuukka.toivonen@intel.com>"); 863 MODULE_AUTHOR("Tianshu Qiu <tian.shu.qiu@intel.com>"); 864 MODULE_AUTHOR("Jian Xu Zheng <jian.xu.zheng@intel.com>"); 865 MODULE_AUTHOR("Yuning Pu <yuning.pu@intel.com>"); 866 MODULE_AUTHOR("Yong Zhi <yong.zhi@intel.com>"); 867 MODULE_LICENSE("GPL v2"); 868 MODULE_DESCRIPTION("Intel ipu3_imgu PCI driver"); 869