1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Copyright (c) 2018 MediaTek Inc. 4 5 #include <linux/bitops.h> 6 #include <linux/clk.h> 7 #include <linux/clk-provider.h> 8 #include <linux/dma-mapping.h> 9 #include <linux/errno.h> 10 #include <linux/interrupt.h> 11 #include <linux/io.h> 12 #include <linux/iopoll.h> 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/platform_device.h> 16 #include <linux/pm_runtime.h> 17 #include <linux/mailbox_controller.h> 18 #include <linux/mailbox/mtk-cmdq-mailbox.h> 19 #include <linux/of.h> 20 21 #define CMDQ_MBOX_AUTOSUSPEND_DELAY_MS 100 22 23 #define CMDQ_OP_CODE_MASK (0xff << CMDQ_OP_CODE_SHIFT) 24 #define CMDQ_NUM_CMD(t) (t->cmd_buf_size / CMDQ_INST_SIZE) 25 #define CMDQ_GCE_NUM_MAX (2) 26 27 #define CMDQ_CURR_IRQ_STATUS 0x10 28 #define CMDQ_SYNC_TOKEN_UPDATE 0x68 29 #define CMDQ_THR_SLOT_CYCLES 0x30 30 #define CMDQ_THR_BASE 0x100 31 #define CMDQ_THR_SIZE 0x80 32 #define CMDQ_THR_WARM_RESET 0x00 33 #define CMDQ_THR_ENABLE_TASK 0x04 34 #define CMDQ_THR_SUSPEND_TASK 0x08 35 #define CMDQ_THR_CURR_STATUS 0x0c 36 #define CMDQ_THR_IRQ_STATUS 0x10 37 #define CMDQ_THR_IRQ_ENABLE 0x14 38 #define CMDQ_THR_CURR_ADDR 0x20 39 #define CMDQ_THR_END_ADDR 0x24 40 #define CMDQ_THR_WAIT_TOKEN 0x30 41 #define CMDQ_THR_PRIORITY 0x40 42 43 #define GCE_GCTL_VALUE 0x48 44 #define GCE_CTRL_BY_SW GENMASK(2, 0) 45 #define GCE_DDR_EN GENMASK(18, 16) 46 47 #define CMDQ_THR_ACTIVE_SLOT_CYCLES 0x3200 48 #define CMDQ_THR_ENABLED 0x1 49 #define CMDQ_THR_DISABLED 0x0 50 #define CMDQ_THR_SUSPEND 0x1 51 #define CMDQ_THR_RESUME 0x0 52 #define CMDQ_THR_STATUS_SUSPENDED BIT(1) 53 #define CMDQ_THR_DO_WARM_RESET BIT(0) 54 #define CMDQ_THR_IRQ_DONE 0x1 55 #define CMDQ_THR_IRQ_ERROR 0x12 56 #define CMDQ_THR_IRQ_EN (CMDQ_THR_IRQ_ERROR | CMDQ_THR_IRQ_DONE) 57 #define CMDQ_THR_IS_WAITING BIT(31) 58 59 #define CMDQ_JUMP_BY_OFFSET 0x10000000 60 #define CMDQ_JUMP_BY_PA 0x10000001 61 62 struct cmdq_thread { 63 struct mbox_chan *chan; 64 void __iomem *base; 65 struct list_head task_busy_list; 66 u32 priority; 67 }; 68 69 struct cmdq_task { 70 struct cmdq *cmdq; 71 struct list_head list_entry; 72 dma_addr_t pa_base; 73 struct cmdq_thread *thread; 74 struct cmdq_pkt *pkt; /* the packet sent from mailbox client */ 75 }; 76 77 struct cmdq { 78 struct mbox_controller mbox; 79 void __iomem *base; 80 int irq; 81 u32 irq_mask; 82 const struct gce_plat *pdata; 83 struct cmdq_thread *thread; 84 struct clk_bulk_data clocks[CMDQ_GCE_NUM_MAX]; 85 bool suspended; 86 }; 87 88 struct gce_plat { 89 u32 thread_nr; 90 u8 shift; 91 bool control_by_sw; 92 bool sw_ddr_en; 93 u32 gce_num; 94 }; 95 96 static void cmdq_sw_ddr_enable(struct cmdq *cmdq, bool enable) 97 { 98 WARN_ON(clk_bulk_enable(cmdq->pdata->gce_num, cmdq->clocks)); 99 100 if (enable) 101 writel(GCE_DDR_EN | GCE_CTRL_BY_SW, cmdq->base + GCE_GCTL_VALUE); 102 else 103 writel(GCE_CTRL_BY_SW, cmdq->base + GCE_GCTL_VALUE); 104 105 clk_bulk_disable(cmdq->pdata->gce_num, cmdq->clocks); 106 } 107 108 u8 cmdq_get_shift_pa(struct mbox_chan *chan) 109 { 110 struct cmdq *cmdq = container_of(chan->mbox, struct cmdq, mbox); 111 112 return cmdq->pdata->shift; 113 } 114 EXPORT_SYMBOL(cmdq_get_shift_pa); 115 116 static int cmdq_thread_suspend(struct cmdq *cmdq, struct cmdq_thread *thread) 117 { 118 u32 status; 119 120 writel(CMDQ_THR_SUSPEND, thread->base + CMDQ_THR_SUSPEND_TASK); 121 122 /* If already disabled, treat as suspended successful. */ 123 if (!(readl(thread->base + CMDQ_THR_ENABLE_TASK) & CMDQ_THR_ENABLED)) 124 return 0; 125 126 if (readl_poll_timeout_atomic(thread->base + CMDQ_THR_CURR_STATUS, 127 status, status & CMDQ_THR_STATUS_SUSPENDED, 0, 10)) { 128 dev_err(cmdq->mbox.dev, "suspend GCE thread 0x%x failed\n", 129 (u32)(thread->base - cmdq->base)); 130 return -EFAULT; 131 } 132 133 return 0; 134 } 135 136 static void cmdq_thread_resume(struct cmdq_thread *thread) 137 { 138 writel(CMDQ_THR_RESUME, thread->base + CMDQ_THR_SUSPEND_TASK); 139 } 140 141 static void cmdq_init(struct cmdq *cmdq) 142 { 143 int i; 144 u32 gctl_regval = 0; 145 146 WARN_ON(clk_bulk_enable(cmdq->pdata->gce_num, cmdq->clocks)); 147 if (cmdq->pdata->control_by_sw) 148 gctl_regval = GCE_CTRL_BY_SW; 149 if (cmdq->pdata->sw_ddr_en) 150 gctl_regval |= GCE_DDR_EN; 151 152 if (gctl_regval) 153 writel(gctl_regval, cmdq->base + GCE_GCTL_VALUE); 154 155 writel(CMDQ_THR_ACTIVE_SLOT_CYCLES, cmdq->base + CMDQ_THR_SLOT_CYCLES); 156 for (i = 0; i <= CMDQ_MAX_EVENT; i++) 157 writel(i, cmdq->base + CMDQ_SYNC_TOKEN_UPDATE); 158 clk_bulk_disable(cmdq->pdata->gce_num, cmdq->clocks); 159 } 160 161 static int cmdq_thread_reset(struct cmdq *cmdq, struct cmdq_thread *thread) 162 { 163 u32 warm_reset; 164 165 writel(CMDQ_THR_DO_WARM_RESET, thread->base + CMDQ_THR_WARM_RESET); 166 if (readl_poll_timeout_atomic(thread->base + CMDQ_THR_WARM_RESET, 167 warm_reset, !(warm_reset & CMDQ_THR_DO_WARM_RESET), 168 0, 10)) { 169 dev_err(cmdq->mbox.dev, "reset GCE thread 0x%x failed\n", 170 (u32)(thread->base - cmdq->base)); 171 return -EFAULT; 172 } 173 174 return 0; 175 } 176 177 static void cmdq_thread_disable(struct cmdq *cmdq, struct cmdq_thread *thread) 178 { 179 cmdq_thread_reset(cmdq, thread); 180 writel(CMDQ_THR_DISABLED, thread->base + CMDQ_THR_ENABLE_TASK); 181 } 182 183 /* notify GCE to re-fetch commands by setting GCE thread PC */ 184 static void cmdq_thread_invalidate_fetched_data(struct cmdq_thread *thread) 185 { 186 writel(readl(thread->base + CMDQ_THR_CURR_ADDR), 187 thread->base + CMDQ_THR_CURR_ADDR); 188 } 189 190 static void cmdq_task_insert_into_thread(struct cmdq_task *task) 191 { 192 struct device *dev = task->cmdq->mbox.dev; 193 struct cmdq_thread *thread = task->thread; 194 struct cmdq_task *prev_task = list_last_entry( 195 &thread->task_busy_list, typeof(*task), list_entry); 196 u64 *prev_task_base = prev_task->pkt->va_base; 197 198 /* let previous task jump to this task */ 199 dma_sync_single_for_cpu(dev, prev_task->pa_base, 200 prev_task->pkt->cmd_buf_size, DMA_TO_DEVICE); 201 prev_task_base[CMDQ_NUM_CMD(prev_task->pkt) - 1] = 202 (u64)CMDQ_JUMP_BY_PA << 32 | 203 (task->pa_base >> task->cmdq->pdata->shift); 204 dma_sync_single_for_device(dev, prev_task->pa_base, 205 prev_task->pkt->cmd_buf_size, DMA_TO_DEVICE); 206 207 cmdq_thread_invalidate_fetched_data(thread); 208 } 209 210 static bool cmdq_thread_is_in_wfe(struct cmdq_thread *thread) 211 { 212 return readl(thread->base + CMDQ_THR_WAIT_TOKEN) & CMDQ_THR_IS_WAITING; 213 } 214 215 static void cmdq_task_exec_done(struct cmdq_task *task, int sta) 216 { 217 struct cmdq_cb_data data; 218 219 data.sta = sta; 220 data.pkt = task->pkt; 221 mbox_chan_received_data(task->thread->chan, &data); 222 223 list_del(&task->list_entry); 224 } 225 226 static void cmdq_task_handle_error(struct cmdq_task *task) 227 { 228 struct cmdq_thread *thread = task->thread; 229 struct cmdq_task *next_task; 230 struct cmdq *cmdq = task->cmdq; 231 232 dev_err(cmdq->mbox.dev, "task 0x%p error\n", task); 233 WARN_ON(cmdq_thread_suspend(cmdq, thread) < 0); 234 next_task = list_first_entry_or_null(&thread->task_busy_list, 235 struct cmdq_task, list_entry); 236 if (next_task) 237 writel(next_task->pa_base >> cmdq->pdata->shift, 238 thread->base + CMDQ_THR_CURR_ADDR); 239 cmdq_thread_resume(thread); 240 } 241 242 static void cmdq_thread_irq_handler(struct cmdq *cmdq, 243 struct cmdq_thread *thread) 244 { 245 struct cmdq_task *task, *tmp, *curr_task = NULL; 246 u32 curr_pa, irq_flag, task_end_pa; 247 bool err; 248 249 irq_flag = readl(thread->base + CMDQ_THR_IRQ_STATUS); 250 writel(~irq_flag, thread->base + CMDQ_THR_IRQ_STATUS); 251 252 /* 253 * When ISR call this function, another CPU core could run 254 * "release task" right before we acquire the spin lock, and thus 255 * reset / disable this GCE thread, so we need to check the enable 256 * bit of this GCE thread. 257 */ 258 if (!(readl(thread->base + CMDQ_THR_ENABLE_TASK) & CMDQ_THR_ENABLED)) 259 return; 260 261 if (irq_flag & CMDQ_THR_IRQ_ERROR) 262 err = true; 263 else if (irq_flag & CMDQ_THR_IRQ_DONE) 264 err = false; 265 else 266 return; 267 268 curr_pa = readl(thread->base + CMDQ_THR_CURR_ADDR) << cmdq->pdata->shift; 269 270 list_for_each_entry_safe(task, tmp, &thread->task_busy_list, 271 list_entry) { 272 task_end_pa = task->pa_base + task->pkt->cmd_buf_size; 273 if (curr_pa >= task->pa_base && curr_pa < task_end_pa) 274 curr_task = task; 275 276 if (!curr_task || curr_pa == task_end_pa - CMDQ_INST_SIZE) { 277 cmdq_task_exec_done(task, 0); 278 kfree(task); 279 } else if (err) { 280 cmdq_task_exec_done(task, -ENOEXEC); 281 cmdq_task_handle_error(curr_task); 282 kfree(task); 283 } 284 285 if (curr_task) 286 break; 287 } 288 289 if (list_empty(&thread->task_busy_list)) 290 cmdq_thread_disable(cmdq, thread); 291 } 292 293 static irqreturn_t cmdq_irq_handler(int irq, void *dev) 294 { 295 struct cmdq *cmdq = dev; 296 unsigned long irq_status, flags = 0L; 297 int bit; 298 299 irq_status = readl(cmdq->base + CMDQ_CURR_IRQ_STATUS) & cmdq->irq_mask; 300 if (!(irq_status ^ cmdq->irq_mask)) 301 return IRQ_NONE; 302 303 for_each_clear_bit(bit, &irq_status, cmdq->pdata->thread_nr) { 304 struct cmdq_thread *thread = &cmdq->thread[bit]; 305 306 spin_lock_irqsave(&thread->chan->lock, flags); 307 cmdq_thread_irq_handler(cmdq, thread); 308 spin_unlock_irqrestore(&thread->chan->lock, flags); 309 } 310 311 pm_runtime_mark_last_busy(cmdq->mbox.dev); 312 313 return IRQ_HANDLED; 314 } 315 316 static int cmdq_runtime_resume(struct device *dev) 317 { 318 struct cmdq *cmdq = dev_get_drvdata(dev); 319 320 return clk_bulk_enable(cmdq->pdata->gce_num, cmdq->clocks); 321 } 322 323 static int cmdq_runtime_suspend(struct device *dev) 324 { 325 struct cmdq *cmdq = dev_get_drvdata(dev); 326 327 clk_bulk_disable(cmdq->pdata->gce_num, cmdq->clocks); 328 return 0; 329 } 330 331 static int cmdq_suspend(struct device *dev) 332 { 333 struct cmdq *cmdq = dev_get_drvdata(dev); 334 struct cmdq_thread *thread; 335 int i; 336 bool task_running = false; 337 338 cmdq->suspended = true; 339 340 for (i = 0; i < cmdq->pdata->thread_nr; i++) { 341 thread = &cmdq->thread[i]; 342 if (!list_empty(&thread->task_busy_list)) { 343 task_running = true; 344 break; 345 } 346 } 347 348 if (task_running) 349 dev_warn(dev, "exist running task(s) in suspend\n"); 350 351 if (cmdq->pdata->sw_ddr_en) 352 cmdq_sw_ddr_enable(cmdq, false); 353 354 return pm_runtime_force_suspend(dev); 355 } 356 357 static int cmdq_resume(struct device *dev) 358 { 359 struct cmdq *cmdq = dev_get_drvdata(dev); 360 361 WARN_ON(pm_runtime_force_resume(dev)); 362 cmdq->suspended = false; 363 364 if (cmdq->pdata->sw_ddr_en) 365 cmdq_sw_ddr_enable(cmdq, true); 366 367 return 0; 368 } 369 370 static void cmdq_remove(struct platform_device *pdev) 371 { 372 struct cmdq *cmdq = platform_get_drvdata(pdev); 373 374 if (cmdq->pdata->sw_ddr_en) 375 cmdq_sw_ddr_enable(cmdq, false); 376 377 if (!IS_ENABLED(CONFIG_PM)) 378 cmdq_runtime_suspend(&pdev->dev); 379 380 clk_bulk_unprepare(cmdq->pdata->gce_num, cmdq->clocks); 381 } 382 383 static int cmdq_mbox_send_data(struct mbox_chan *chan, void *data) 384 { 385 struct cmdq_pkt *pkt = (struct cmdq_pkt *)data; 386 struct cmdq_thread *thread = (struct cmdq_thread *)chan->con_priv; 387 struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev); 388 struct cmdq_task *task; 389 unsigned long curr_pa, end_pa; 390 int ret; 391 392 /* Client should not flush new tasks if suspended. */ 393 WARN_ON(cmdq->suspended); 394 395 ret = pm_runtime_get_sync(cmdq->mbox.dev); 396 if (ret < 0) 397 return ret; 398 399 task = kzalloc(sizeof(*task), GFP_ATOMIC); 400 if (!task) { 401 pm_runtime_put_autosuspend(cmdq->mbox.dev); 402 return -ENOMEM; 403 } 404 405 task->cmdq = cmdq; 406 INIT_LIST_HEAD(&task->list_entry); 407 task->pa_base = pkt->pa_base; 408 task->thread = thread; 409 task->pkt = pkt; 410 411 if (list_empty(&thread->task_busy_list)) { 412 /* 413 * The thread reset will clear thread related register to 0, 414 * including pc, end, priority, irq, suspend and enable. Thus 415 * set CMDQ_THR_ENABLED to CMDQ_THR_ENABLE_TASK will enable 416 * thread and make it running. 417 */ 418 WARN_ON(cmdq_thread_reset(cmdq, thread) < 0); 419 420 writel(task->pa_base >> cmdq->pdata->shift, 421 thread->base + CMDQ_THR_CURR_ADDR); 422 writel((task->pa_base + pkt->cmd_buf_size) >> cmdq->pdata->shift, 423 thread->base + CMDQ_THR_END_ADDR); 424 425 writel(thread->priority, thread->base + CMDQ_THR_PRIORITY); 426 writel(CMDQ_THR_IRQ_EN, thread->base + CMDQ_THR_IRQ_ENABLE); 427 writel(CMDQ_THR_ENABLED, thread->base + CMDQ_THR_ENABLE_TASK); 428 } else { 429 WARN_ON(cmdq_thread_suspend(cmdq, thread) < 0); 430 curr_pa = readl(thread->base + CMDQ_THR_CURR_ADDR) << 431 cmdq->pdata->shift; 432 end_pa = readl(thread->base + CMDQ_THR_END_ADDR) << 433 cmdq->pdata->shift; 434 /* check boundary */ 435 if (curr_pa == end_pa - CMDQ_INST_SIZE || 436 curr_pa == end_pa) { 437 /* set to this task directly */ 438 writel(task->pa_base >> cmdq->pdata->shift, 439 thread->base + CMDQ_THR_CURR_ADDR); 440 } else { 441 cmdq_task_insert_into_thread(task); 442 smp_mb(); /* modify jump before enable thread */ 443 } 444 writel((task->pa_base + pkt->cmd_buf_size) >> cmdq->pdata->shift, 445 thread->base + CMDQ_THR_END_ADDR); 446 cmdq_thread_resume(thread); 447 } 448 list_move_tail(&task->list_entry, &thread->task_busy_list); 449 450 pm_runtime_mark_last_busy(cmdq->mbox.dev); 451 pm_runtime_put_autosuspend(cmdq->mbox.dev); 452 453 return 0; 454 } 455 456 static int cmdq_mbox_startup(struct mbox_chan *chan) 457 { 458 return 0; 459 } 460 461 static void cmdq_mbox_shutdown(struct mbox_chan *chan) 462 { 463 struct cmdq_thread *thread = (struct cmdq_thread *)chan->con_priv; 464 struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev); 465 struct cmdq_task *task, *tmp; 466 unsigned long flags; 467 468 WARN_ON(pm_runtime_get_sync(cmdq->mbox.dev)); 469 470 spin_lock_irqsave(&thread->chan->lock, flags); 471 if (list_empty(&thread->task_busy_list)) 472 goto done; 473 474 WARN_ON(cmdq_thread_suspend(cmdq, thread) < 0); 475 476 /* make sure executed tasks have success callback */ 477 cmdq_thread_irq_handler(cmdq, thread); 478 if (list_empty(&thread->task_busy_list)) 479 goto done; 480 481 list_for_each_entry_safe(task, tmp, &thread->task_busy_list, 482 list_entry) { 483 cmdq_task_exec_done(task, -ECONNABORTED); 484 kfree(task); 485 } 486 487 cmdq_thread_disable(cmdq, thread); 488 489 done: 490 /* 491 * The thread->task_busy_list empty means thread already disable. The 492 * cmdq_mbox_send_data() always reset thread which clear disable and 493 * suspend statue when first pkt send to channel, so there is no need 494 * to do any operation here, only unlock and leave. 495 */ 496 spin_unlock_irqrestore(&thread->chan->lock, flags); 497 498 pm_runtime_mark_last_busy(cmdq->mbox.dev); 499 pm_runtime_put_autosuspend(cmdq->mbox.dev); 500 } 501 502 static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) 503 { 504 struct cmdq_thread *thread = (struct cmdq_thread *)chan->con_priv; 505 struct cmdq_cb_data data; 506 struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev); 507 struct cmdq_task *task, *tmp; 508 unsigned long flags; 509 u32 enable; 510 int ret; 511 512 ret = pm_runtime_get_sync(cmdq->mbox.dev); 513 if (ret < 0) 514 return ret; 515 516 spin_lock_irqsave(&thread->chan->lock, flags); 517 if (list_empty(&thread->task_busy_list)) 518 goto out; 519 520 WARN_ON(cmdq_thread_suspend(cmdq, thread) < 0); 521 if (!cmdq_thread_is_in_wfe(thread)) 522 goto wait; 523 524 list_for_each_entry_safe(task, tmp, &thread->task_busy_list, 525 list_entry) { 526 data.sta = -ECONNABORTED; 527 data.pkt = task->pkt; 528 mbox_chan_received_data(task->thread->chan, &data); 529 list_del(&task->list_entry); 530 kfree(task); 531 } 532 533 cmdq_thread_resume(thread); 534 cmdq_thread_disable(cmdq, thread); 535 536 out: 537 spin_unlock_irqrestore(&thread->chan->lock, flags); 538 pm_runtime_mark_last_busy(cmdq->mbox.dev); 539 pm_runtime_put_autosuspend(cmdq->mbox.dev); 540 541 return 0; 542 543 wait: 544 cmdq_thread_resume(thread); 545 spin_unlock_irqrestore(&thread->chan->lock, flags); 546 if (readl_poll_timeout_atomic(thread->base + CMDQ_THR_ENABLE_TASK, 547 enable, enable == 0, 1, timeout)) { 548 dev_err(cmdq->mbox.dev, "Fail to wait GCE thread 0x%x done\n", 549 (u32)(thread->base - cmdq->base)); 550 551 return -EFAULT; 552 } 553 pm_runtime_mark_last_busy(cmdq->mbox.dev); 554 pm_runtime_put_autosuspend(cmdq->mbox.dev); 555 return 0; 556 } 557 558 static const struct mbox_chan_ops cmdq_mbox_chan_ops = { 559 .send_data = cmdq_mbox_send_data, 560 .startup = cmdq_mbox_startup, 561 .shutdown = cmdq_mbox_shutdown, 562 .flush = cmdq_mbox_flush, 563 }; 564 565 static struct mbox_chan *cmdq_xlate(struct mbox_controller *mbox, 566 const struct of_phandle_args *sp) 567 { 568 int ind = sp->args[0]; 569 struct cmdq_thread *thread; 570 571 if (ind >= mbox->num_chans) 572 return ERR_PTR(-EINVAL); 573 574 thread = (struct cmdq_thread *)mbox->chans[ind].con_priv; 575 thread->priority = sp->args[1]; 576 thread->chan = &mbox->chans[ind]; 577 578 return &mbox->chans[ind]; 579 } 580 581 static int cmdq_probe(struct platform_device *pdev) 582 { 583 struct device *dev = &pdev->dev; 584 struct cmdq *cmdq; 585 int err, i; 586 struct device_node *phandle = dev->of_node; 587 struct device_node *node; 588 int alias_id = 0; 589 static const char * const clk_name = "gce"; 590 static const char * const clk_names[] = { "gce0", "gce1" }; 591 592 cmdq = devm_kzalloc(dev, sizeof(*cmdq), GFP_KERNEL); 593 if (!cmdq) 594 return -ENOMEM; 595 596 cmdq->base = devm_platform_ioremap_resource(pdev, 0); 597 if (IS_ERR(cmdq->base)) 598 return PTR_ERR(cmdq->base); 599 600 cmdq->irq = platform_get_irq(pdev, 0); 601 if (cmdq->irq < 0) 602 return cmdq->irq; 603 604 cmdq->pdata = device_get_match_data(dev); 605 if (!cmdq->pdata) { 606 dev_err(dev, "failed to get match data\n"); 607 return -EINVAL; 608 } 609 610 cmdq->irq_mask = GENMASK(cmdq->pdata->thread_nr - 1, 0); 611 612 dev_dbg(dev, "cmdq device: addr:0x%p, va:0x%p, irq:%d\n", 613 dev, cmdq->base, cmdq->irq); 614 615 if (cmdq->pdata->gce_num > 1) { 616 for_each_child_of_node(phandle->parent, node) { 617 alias_id = of_alias_get_id(node, clk_name); 618 if (alias_id >= 0 && alias_id < cmdq->pdata->gce_num) { 619 cmdq->clocks[alias_id].id = clk_names[alias_id]; 620 cmdq->clocks[alias_id].clk = of_clk_get(node, 0); 621 if (IS_ERR(cmdq->clocks[alias_id].clk)) { 622 of_node_put(node); 623 return dev_err_probe(dev, 624 PTR_ERR(cmdq->clocks[alias_id].clk), 625 "failed to get gce clk: %d\n", 626 alias_id); 627 } 628 } 629 } 630 } else { 631 cmdq->clocks[alias_id].id = clk_name; 632 cmdq->clocks[alias_id].clk = devm_clk_get(&pdev->dev, clk_name); 633 if (IS_ERR(cmdq->clocks[alias_id].clk)) { 634 return dev_err_probe(dev, PTR_ERR(cmdq->clocks[alias_id].clk), 635 "failed to get gce clk\n"); 636 } 637 } 638 639 cmdq->mbox.dev = dev; 640 cmdq->mbox.chans = devm_kcalloc(dev, cmdq->pdata->thread_nr, 641 sizeof(*cmdq->mbox.chans), GFP_KERNEL); 642 if (!cmdq->mbox.chans) 643 return -ENOMEM; 644 645 cmdq->mbox.num_chans = cmdq->pdata->thread_nr; 646 cmdq->mbox.ops = &cmdq_mbox_chan_ops; 647 cmdq->mbox.of_xlate = cmdq_xlate; 648 649 /* make use of TXDONE_BY_ACK */ 650 cmdq->mbox.txdone_irq = false; 651 cmdq->mbox.txdone_poll = false; 652 653 cmdq->thread = devm_kcalloc(dev, cmdq->pdata->thread_nr, 654 sizeof(*cmdq->thread), GFP_KERNEL); 655 if (!cmdq->thread) 656 return -ENOMEM; 657 658 for (i = 0; i < cmdq->pdata->thread_nr; i++) { 659 cmdq->thread[i].base = cmdq->base + CMDQ_THR_BASE + 660 CMDQ_THR_SIZE * i; 661 INIT_LIST_HEAD(&cmdq->thread[i].task_busy_list); 662 cmdq->mbox.chans[i].con_priv = (void *)&cmdq->thread[i]; 663 } 664 665 err = devm_mbox_controller_register(dev, &cmdq->mbox); 666 if (err < 0) { 667 dev_err(dev, "failed to register mailbox: %d\n", err); 668 return err; 669 } 670 671 platform_set_drvdata(pdev, cmdq); 672 673 WARN_ON(clk_bulk_prepare(cmdq->pdata->gce_num, cmdq->clocks)); 674 675 cmdq_init(cmdq); 676 677 err = devm_request_irq(dev, cmdq->irq, cmdq_irq_handler, IRQF_SHARED, 678 "mtk_cmdq", cmdq); 679 if (err < 0) { 680 dev_err(dev, "failed to register ISR (%d)\n", err); 681 return err; 682 } 683 684 /* If Runtime PM is not available enable the clocks now. */ 685 if (!IS_ENABLED(CONFIG_PM)) { 686 err = cmdq_runtime_resume(dev); 687 if (err) 688 return err; 689 } 690 691 err = devm_pm_runtime_enable(dev); 692 if (err) 693 return err; 694 695 pm_runtime_set_autosuspend_delay(dev, CMDQ_MBOX_AUTOSUSPEND_DELAY_MS); 696 pm_runtime_use_autosuspend(dev); 697 698 return 0; 699 } 700 701 static const struct dev_pm_ops cmdq_pm_ops = { 702 .suspend = cmdq_suspend, 703 .resume = cmdq_resume, 704 SET_RUNTIME_PM_OPS(cmdq_runtime_suspend, 705 cmdq_runtime_resume, NULL) 706 }; 707 708 static const struct gce_plat gce_plat_mt6779 = { 709 .thread_nr = 24, 710 .shift = 3, 711 .control_by_sw = false, 712 .gce_num = 1 713 }; 714 715 static const struct gce_plat gce_plat_mt8173 = { 716 .thread_nr = 16, 717 .shift = 0, 718 .control_by_sw = false, 719 .gce_num = 1 720 }; 721 722 static const struct gce_plat gce_plat_mt8183 = { 723 .thread_nr = 24, 724 .shift = 0, 725 .control_by_sw = false, 726 .gce_num = 1 727 }; 728 729 static const struct gce_plat gce_plat_mt8186 = { 730 .thread_nr = 24, 731 .shift = 3, 732 .control_by_sw = true, 733 .sw_ddr_en = true, 734 .gce_num = 1 735 }; 736 737 static const struct gce_plat gce_plat_mt8188 = { 738 .thread_nr = 32, 739 .shift = 3, 740 .control_by_sw = true, 741 .gce_num = 2 742 }; 743 744 static const struct gce_plat gce_plat_mt8192 = { 745 .thread_nr = 24, 746 .shift = 3, 747 .control_by_sw = true, 748 .gce_num = 1 749 }; 750 751 static const struct gce_plat gce_plat_mt8195 = { 752 .thread_nr = 24, 753 .shift = 3, 754 .control_by_sw = true, 755 .gce_num = 2 756 }; 757 758 static const struct of_device_id cmdq_of_ids[] = { 759 {.compatible = "mediatek,mt6779-gce", .data = (void *)&gce_plat_mt6779}, 760 {.compatible = "mediatek,mt8173-gce", .data = (void *)&gce_plat_mt8173}, 761 {.compatible = "mediatek,mt8183-gce", .data = (void *)&gce_plat_mt8183}, 762 {.compatible = "mediatek,mt8186-gce", .data = (void *)&gce_plat_mt8186}, 763 {.compatible = "mediatek,mt8188-gce", .data = (void *)&gce_plat_mt8188}, 764 {.compatible = "mediatek,mt8192-gce", .data = (void *)&gce_plat_mt8192}, 765 {.compatible = "mediatek,mt8195-gce", .data = (void *)&gce_plat_mt8195}, 766 {} 767 }; 768 769 static struct platform_driver cmdq_drv = { 770 .probe = cmdq_probe, 771 .remove_new = cmdq_remove, 772 .driver = { 773 .name = "mtk_cmdq", 774 .pm = &cmdq_pm_ops, 775 .of_match_table = cmdq_of_ids, 776 } 777 }; 778 779 static int __init cmdq_drv_init(void) 780 { 781 return platform_driver_register(&cmdq_drv); 782 } 783 784 static void __exit cmdq_drv_exit(void) 785 { 786 platform_driver_unregister(&cmdq_drv); 787 } 788 789 subsys_initcall(cmdq_drv_init); 790 module_exit(cmdq_drv_exit); 791 792 MODULE_LICENSE("GPL v2"); 793