1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2021, MediaTek Inc. 4 * Copyright (c) 2021-2022, Intel Corporation. 5 * 6 * Authors: 7 * Amir Hanania <amir.hanania@intel.com> 8 * Haijun Liu <haijun.liu@mediatek.com> 9 * Moises Veleta <moises.veleta@intel.com> 10 * Ricardo Martinez <ricardo.martinez@linux.intel.com> 11 * Sreehari Kancharla <sreehari.kancharla@intel.com> 12 * 13 * Contributors: 14 * Andy Shevchenko <andriy.shevchenko@linux.intel.com> 15 * Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com> 16 * Eliot Lee <eliot.lee@intel.com> 17 */ 18 19 #include <linux/bits.h> 20 #include <linux/bitops.h> 21 #include <linux/delay.h> 22 #include <linux/device.h> 23 #include <linux/dmapool.h> 24 #include <linux/dma-mapping.h> 25 #include <linux/dma-direction.h> 26 #include <linux/gfp.h> 27 #include <linux/io.h> 28 #include <linux/io-64-nonatomic-lo-hi.h> 29 #include <linux/iopoll.h> 30 #include <linux/irqreturn.h> 31 #include <linux/kernel.h> 32 #include <linux/kthread.h> 33 #include <linux/list.h> 34 #include <linux/netdevice.h> 35 #include <linux/pci.h> 36 #include <linux/pm_runtime.h> 37 #include <linux/sched.h> 38 #include <linux/skbuff.h> 39 #include <linux/slab.h> 40 #include <linux/spinlock.h> 41 #include <linux/types.h> 42 #include <linux/wait.h> 43 #include <linux/workqueue.h> 44 45 #include "t7xx_cldma.h" 46 #include "t7xx_hif_cldma.h" 47 #include "t7xx_mhccif.h" 48 #include "t7xx_pci.h" 49 #include "t7xx_pcie_mac.h" 50 #include "t7xx_port_proxy.h" 51 #include "t7xx_reg.h" 52 #include "t7xx_state_monitor.h" 53 54 #define MAX_TX_BUDGET 16 55 #define MAX_RX_BUDGET 16 56 57 #define CHECK_Q_STOP_TIMEOUT_US 1000000 58 #define CHECK_Q_STOP_STEP_US 10000 59 60 #define CLDMA_JUMBO_BUFF_SZ (63 * 1024 + sizeof(struct ccci_header)) 61 62 static void md_cd_queue_struct_reset(struct cldma_queue *queue, struct cldma_ctrl *md_ctrl, 63 enum mtk_txrx tx_rx, unsigned int index) 64 { 65 queue->dir = tx_rx; 66 queue->index = index; 67 queue->md_ctrl = md_ctrl; 68 queue->tr_ring = NULL; 69 queue->tr_done = NULL; 70 queue->tx_next = NULL; 71 } 72 73 static void md_cd_queue_struct_init(struct cldma_queue *queue, struct cldma_ctrl *md_ctrl, 74 enum mtk_txrx tx_rx, unsigned int index) 75 { 76 md_cd_queue_struct_reset(queue, md_ctrl, tx_rx, index); 77 init_waitqueue_head(&queue->req_wq); 78 spin_lock_init(&queue->ring_lock); 79 } 80 81 static void t7xx_cldma_gpd_set_data_ptr(struct cldma_gpd *gpd, dma_addr_t data_ptr) 82 { 83 gpd->data_buff_bd_ptr_h = cpu_to_le32(upper_32_bits(data_ptr)); 84 gpd->data_buff_bd_ptr_l = cpu_to_le32(lower_32_bits(data_ptr)); 85 } 86 87 static void t7xx_cldma_gpd_set_next_ptr(struct cldma_gpd *gpd, dma_addr_t next_ptr) 88 { 89 gpd->next_gpd_ptr_h = cpu_to_le32(upper_32_bits(next_ptr)); 90 gpd->next_gpd_ptr_l = cpu_to_le32(lower_32_bits(next_ptr)); 91 } 92 93 static int t7xx_cldma_alloc_and_map_skb(struct cldma_ctrl *md_ctrl, struct cldma_request *req, 94 size_t size, gfp_t gfp_mask) 95 { 96 req->skb = __dev_alloc_skb(size, gfp_mask); 97 if (!req->skb) 98 return -ENOMEM; 99 100 req->mapped_buff = dma_map_single(md_ctrl->dev, req->skb->data, size, DMA_FROM_DEVICE); 101 if (dma_mapping_error(md_ctrl->dev, req->mapped_buff)) { 102 dev_kfree_skb_any(req->skb); 103 req->skb = NULL; 104 req->mapped_buff = 0; 105 dev_err(md_ctrl->dev, "DMA mapping failed\n"); 106 return -ENOMEM; 107 } 108 109 return 0; 110 } 111 112 static int t7xx_cldma_gpd_rx_from_q(struct cldma_queue *queue, int budget, bool *over_budget) 113 { 114 struct cldma_ctrl *md_ctrl = queue->md_ctrl; 115 unsigned int hwo_polling_count = 0; 116 struct t7xx_cldma_hw *hw_info; 117 bool rx_not_done = true; 118 unsigned long flags; 119 int count = 0; 120 121 hw_info = &md_ctrl->hw_info; 122 123 do { 124 struct cldma_request *req; 125 struct cldma_gpd *gpd; 126 struct sk_buff *skb; 127 int ret; 128 129 req = queue->tr_done; 130 if (!req) 131 return -ENODATA; 132 133 gpd = req->gpd; 134 if ((gpd->flags & GPD_FLAGS_HWO) || !req->skb) { 135 dma_addr_t gpd_addr; 136 137 if (!pci_device_is_present(to_pci_dev(md_ctrl->dev))) { 138 dev_err(md_ctrl->dev, "PCIe Link disconnected\n"); 139 return -ENODEV; 140 } 141 142 gpd_addr = ioread64(hw_info->ap_pdn_base + REG_CLDMA_DL_CURRENT_ADDRL_0 + 143 queue->index * sizeof(u64)); 144 if (req->gpd_addr == gpd_addr || hwo_polling_count++ >= 100) 145 return 0; 146 147 udelay(1); 148 continue; 149 } 150 151 hwo_polling_count = 0; 152 skb = req->skb; 153 154 if (req->mapped_buff) { 155 dma_unmap_single(md_ctrl->dev, req->mapped_buff, 156 queue->tr_ring->pkt_size, DMA_FROM_DEVICE); 157 req->mapped_buff = 0; 158 } 159 160 skb->len = 0; 161 skb_reset_tail_pointer(skb); 162 skb_put(skb, le16_to_cpu(gpd->data_buff_len)); 163 164 ret = md_ctrl->recv_skb(queue, skb); 165 /* Break processing, will try again later */ 166 if (ret < 0) 167 return ret; 168 169 req->skb = NULL; 170 t7xx_cldma_gpd_set_data_ptr(gpd, 0); 171 172 spin_lock_irqsave(&queue->ring_lock, flags); 173 queue->tr_done = list_next_entry_circular(req, &queue->tr_ring->gpd_ring, entry); 174 spin_unlock_irqrestore(&queue->ring_lock, flags); 175 req = queue->rx_refill; 176 177 ret = t7xx_cldma_alloc_and_map_skb(md_ctrl, req, queue->tr_ring->pkt_size, GFP_KERNEL); 178 if (ret) 179 return ret; 180 181 gpd = req->gpd; 182 t7xx_cldma_gpd_set_data_ptr(gpd, req->mapped_buff); 183 gpd->data_buff_len = 0; 184 gpd->flags = GPD_FLAGS_IOC | GPD_FLAGS_HWO; 185 186 spin_lock_irqsave(&queue->ring_lock, flags); 187 queue->rx_refill = list_next_entry_circular(req, &queue->tr_ring->gpd_ring, entry); 188 spin_unlock_irqrestore(&queue->ring_lock, flags); 189 190 rx_not_done = ++count < budget || !need_resched(); 191 } while (rx_not_done); 192 193 *over_budget = true; 194 return 0; 195 } 196 197 static int t7xx_cldma_gpd_rx_collect(struct cldma_queue *queue, int budget) 198 { 199 struct cldma_ctrl *md_ctrl = queue->md_ctrl; 200 struct t7xx_cldma_hw *hw_info; 201 unsigned int pending_rx_int; 202 bool over_budget = false; 203 unsigned long flags; 204 int ret; 205 206 hw_info = &md_ctrl->hw_info; 207 208 do { 209 ret = t7xx_cldma_gpd_rx_from_q(queue, budget, &over_budget); 210 if (ret == -ENODATA) 211 return 0; 212 else if (ret) 213 return ret; 214 215 pending_rx_int = 0; 216 217 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 218 if (md_ctrl->rxq_active & BIT(queue->index)) { 219 if (!t7xx_cldma_hw_queue_status(hw_info, queue->index, MTK_RX)) 220 t7xx_cldma_hw_resume_queue(hw_info, queue->index, MTK_RX); 221 222 pending_rx_int = t7xx_cldma_hw_int_status(hw_info, BIT(queue->index), 223 MTK_RX); 224 if (pending_rx_int) { 225 t7xx_cldma_hw_rx_done(hw_info, pending_rx_int); 226 227 if (over_budget) { 228 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 229 return -EAGAIN; 230 } 231 } 232 } 233 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 234 } while (pending_rx_int); 235 236 return 0; 237 } 238 239 static void t7xx_cldma_rx_done(struct work_struct *work) 240 { 241 struct cldma_queue *queue = container_of(work, struct cldma_queue, cldma_work); 242 struct cldma_ctrl *md_ctrl = queue->md_ctrl; 243 int value; 244 245 value = t7xx_cldma_gpd_rx_collect(queue, queue->budget); 246 if (value && md_ctrl->rxq_active & BIT(queue->index)) { 247 queue_work(queue->worker, &queue->cldma_work); 248 return; 249 } 250 251 t7xx_cldma_clear_ip_busy(&md_ctrl->hw_info); 252 t7xx_cldma_hw_irq_en_txrx(&md_ctrl->hw_info, queue->index, MTK_RX); 253 t7xx_cldma_hw_irq_en_eq(&md_ctrl->hw_info, queue->index, MTK_RX); 254 pm_runtime_mark_last_busy(md_ctrl->dev); 255 pm_runtime_put_autosuspend(md_ctrl->dev); 256 } 257 258 static int t7xx_cldma_gpd_tx_collect(struct cldma_queue *queue) 259 { 260 struct cldma_ctrl *md_ctrl = queue->md_ctrl; 261 unsigned int dma_len, count = 0; 262 struct cldma_request *req; 263 struct cldma_gpd *gpd; 264 unsigned long flags; 265 dma_addr_t dma_free; 266 struct sk_buff *skb; 267 268 while (!kthread_should_stop()) { 269 spin_lock_irqsave(&queue->ring_lock, flags); 270 req = queue->tr_done; 271 if (!req) { 272 spin_unlock_irqrestore(&queue->ring_lock, flags); 273 break; 274 } 275 gpd = req->gpd; 276 if ((gpd->flags & GPD_FLAGS_HWO) || !req->skb) { 277 spin_unlock_irqrestore(&queue->ring_lock, flags); 278 break; 279 } 280 queue->budget++; 281 dma_free = req->mapped_buff; 282 dma_len = le16_to_cpu(gpd->data_buff_len); 283 skb = req->skb; 284 req->skb = NULL; 285 queue->tr_done = list_next_entry_circular(req, &queue->tr_ring->gpd_ring, entry); 286 spin_unlock_irqrestore(&queue->ring_lock, flags); 287 288 count++; 289 dma_unmap_single(md_ctrl->dev, dma_free, dma_len, DMA_TO_DEVICE); 290 dev_kfree_skb_any(skb); 291 } 292 293 if (count) 294 wake_up_nr(&queue->req_wq, count); 295 296 return count; 297 } 298 299 static void t7xx_cldma_txq_empty_hndl(struct cldma_queue *queue) 300 { 301 struct cldma_ctrl *md_ctrl = queue->md_ctrl; 302 struct cldma_request *req; 303 dma_addr_t ul_curr_addr; 304 unsigned long flags; 305 bool pending_gpd; 306 307 if (!(md_ctrl->txq_active & BIT(queue->index))) 308 return; 309 310 spin_lock_irqsave(&queue->ring_lock, flags); 311 req = list_prev_entry_circular(queue->tx_next, &queue->tr_ring->gpd_ring, entry); 312 spin_unlock_irqrestore(&queue->ring_lock, flags); 313 314 pending_gpd = (req->gpd->flags & GPD_FLAGS_HWO) && req->skb; 315 316 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 317 if (pending_gpd) { 318 struct t7xx_cldma_hw *hw_info = &md_ctrl->hw_info; 319 320 /* Check current processing TGPD, 64-bit address is in a table by Q index */ 321 ul_curr_addr = ioread64(hw_info->ap_pdn_base + REG_CLDMA_UL_CURRENT_ADDRL_0 + 322 queue->index * sizeof(u64)); 323 if (req->gpd_addr != ul_curr_addr) { 324 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 325 dev_err(md_ctrl->dev, "CLDMA%d queue %d is not empty\n", 326 md_ctrl->hif_id, queue->index); 327 return; 328 } 329 330 t7xx_cldma_hw_resume_queue(hw_info, queue->index, MTK_TX); 331 } 332 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 333 } 334 335 static void t7xx_cldma_tx_done(struct work_struct *work) 336 { 337 struct cldma_queue *queue = container_of(work, struct cldma_queue, cldma_work); 338 struct cldma_ctrl *md_ctrl = queue->md_ctrl; 339 struct t7xx_cldma_hw *hw_info; 340 unsigned int l2_tx_int; 341 unsigned long flags; 342 343 hw_info = &md_ctrl->hw_info; 344 t7xx_cldma_gpd_tx_collect(queue); 345 l2_tx_int = t7xx_cldma_hw_int_status(hw_info, BIT(queue->index) | EQ_STA_BIT(queue->index), 346 MTK_TX); 347 if (l2_tx_int & EQ_STA_BIT(queue->index)) { 348 t7xx_cldma_hw_tx_done(hw_info, EQ_STA_BIT(queue->index)); 349 t7xx_cldma_txq_empty_hndl(queue); 350 } 351 352 if (l2_tx_int & BIT(queue->index)) { 353 t7xx_cldma_hw_tx_done(hw_info, BIT(queue->index)); 354 queue_work(queue->worker, &queue->cldma_work); 355 return; 356 } 357 358 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 359 if (md_ctrl->txq_active & BIT(queue->index)) { 360 t7xx_cldma_clear_ip_busy(hw_info); 361 t7xx_cldma_hw_irq_en_eq(hw_info, queue->index, MTK_TX); 362 t7xx_cldma_hw_irq_en_txrx(hw_info, queue->index, MTK_TX); 363 } 364 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 365 366 pm_runtime_mark_last_busy(md_ctrl->dev); 367 pm_runtime_put_autosuspend(md_ctrl->dev); 368 } 369 370 static void t7xx_cldma_ring_free(struct cldma_ctrl *md_ctrl, 371 struct cldma_ring *ring, enum dma_data_direction tx_rx) 372 { 373 struct cldma_request *req_cur, *req_next; 374 375 list_for_each_entry_safe(req_cur, req_next, &ring->gpd_ring, entry) { 376 if (req_cur->mapped_buff && req_cur->skb) { 377 dma_unmap_single(md_ctrl->dev, req_cur->mapped_buff, 378 ring->pkt_size, tx_rx); 379 req_cur->mapped_buff = 0; 380 } 381 382 dev_kfree_skb_any(req_cur->skb); 383 384 if (req_cur->gpd) 385 dma_pool_free(md_ctrl->gpd_dmapool, req_cur->gpd, req_cur->gpd_addr); 386 387 list_del(&req_cur->entry); 388 kfree(req_cur); 389 } 390 } 391 392 static struct cldma_request *t7xx_alloc_rx_request(struct cldma_ctrl *md_ctrl, size_t pkt_size) 393 { 394 struct cldma_request *req; 395 int val; 396 397 req = kzalloc(sizeof(*req), GFP_KERNEL); 398 if (!req) 399 return NULL; 400 401 req->gpd = dma_pool_zalloc(md_ctrl->gpd_dmapool, GFP_KERNEL, &req->gpd_addr); 402 if (!req->gpd) 403 goto err_free_req; 404 405 val = t7xx_cldma_alloc_and_map_skb(md_ctrl, req, pkt_size, GFP_KERNEL); 406 if (val) 407 goto err_free_pool; 408 409 return req; 410 411 err_free_pool: 412 dma_pool_free(md_ctrl->gpd_dmapool, req->gpd, req->gpd_addr); 413 414 err_free_req: 415 kfree(req); 416 417 return NULL; 418 } 419 420 static int t7xx_cldma_rx_ring_init(struct cldma_ctrl *md_ctrl, struct cldma_ring *ring) 421 { 422 struct cldma_request *req; 423 struct cldma_gpd *gpd; 424 int i; 425 426 INIT_LIST_HEAD(&ring->gpd_ring); 427 ring->length = MAX_RX_BUDGET; 428 429 for (i = 0; i < ring->length; i++) { 430 req = t7xx_alloc_rx_request(md_ctrl, ring->pkt_size); 431 if (!req) { 432 t7xx_cldma_ring_free(md_ctrl, ring, DMA_FROM_DEVICE); 433 return -ENOMEM; 434 } 435 436 gpd = req->gpd; 437 t7xx_cldma_gpd_set_data_ptr(gpd, req->mapped_buff); 438 gpd->rx_data_allow_len = cpu_to_le16(ring->pkt_size); 439 gpd->flags = GPD_FLAGS_IOC | GPD_FLAGS_HWO; 440 INIT_LIST_HEAD(&req->entry); 441 list_add_tail(&req->entry, &ring->gpd_ring); 442 } 443 444 /* Link previous GPD to next GPD, circular */ 445 list_for_each_entry(req, &ring->gpd_ring, entry) { 446 t7xx_cldma_gpd_set_next_ptr(gpd, req->gpd_addr); 447 gpd = req->gpd; 448 } 449 450 return 0; 451 } 452 453 static struct cldma_request *t7xx_alloc_tx_request(struct cldma_ctrl *md_ctrl) 454 { 455 struct cldma_request *req; 456 457 req = kzalloc(sizeof(*req), GFP_KERNEL); 458 if (!req) 459 return NULL; 460 461 req->gpd = dma_pool_zalloc(md_ctrl->gpd_dmapool, GFP_KERNEL, &req->gpd_addr); 462 if (!req->gpd) { 463 kfree(req); 464 return NULL; 465 } 466 467 return req; 468 } 469 470 static int t7xx_cldma_tx_ring_init(struct cldma_ctrl *md_ctrl, struct cldma_ring *ring) 471 { 472 struct cldma_request *req; 473 struct cldma_gpd *gpd; 474 int i; 475 476 INIT_LIST_HEAD(&ring->gpd_ring); 477 ring->length = MAX_TX_BUDGET; 478 479 for (i = 0; i < ring->length; i++) { 480 req = t7xx_alloc_tx_request(md_ctrl); 481 if (!req) { 482 t7xx_cldma_ring_free(md_ctrl, ring, DMA_TO_DEVICE); 483 return -ENOMEM; 484 } 485 486 gpd = req->gpd; 487 gpd->flags = GPD_FLAGS_IOC; 488 INIT_LIST_HEAD(&req->entry); 489 list_add_tail(&req->entry, &ring->gpd_ring); 490 } 491 492 /* Link previous GPD to next GPD, circular */ 493 list_for_each_entry(req, &ring->gpd_ring, entry) { 494 t7xx_cldma_gpd_set_next_ptr(gpd, req->gpd_addr); 495 gpd = req->gpd; 496 } 497 498 return 0; 499 } 500 501 /** 502 * t7xx_cldma_q_reset() - Reset CLDMA request pointers to their initial values. 503 * @queue: Pointer to the queue structure. 504 * 505 * Called with ring_lock (unless called during initialization phase) 506 */ 507 static void t7xx_cldma_q_reset(struct cldma_queue *queue) 508 { 509 struct cldma_request *req; 510 511 req = list_first_entry(&queue->tr_ring->gpd_ring, struct cldma_request, entry); 512 queue->tr_done = req; 513 queue->budget = queue->tr_ring->length; 514 515 if (queue->dir == MTK_TX) 516 queue->tx_next = req; 517 else 518 queue->rx_refill = req; 519 } 520 521 static void t7xx_cldma_rxq_init(struct cldma_queue *queue) 522 { 523 struct cldma_ctrl *md_ctrl = queue->md_ctrl; 524 525 queue->dir = MTK_RX; 526 queue->tr_ring = &md_ctrl->rx_ring[queue->index]; 527 t7xx_cldma_q_reset(queue); 528 } 529 530 static void t7xx_cldma_txq_init(struct cldma_queue *queue) 531 { 532 struct cldma_ctrl *md_ctrl = queue->md_ctrl; 533 534 queue->dir = MTK_TX; 535 queue->tr_ring = &md_ctrl->tx_ring[queue->index]; 536 t7xx_cldma_q_reset(queue); 537 } 538 539 static void t7xx_cldma_enable_irq(struct cldma_ctrl *md_ctrl) 540 { 541 t7xx_pcie_mac_set_int(md_ctrl->t7xx_dev, md_ctrl->hw_info.phy_interrupt_id); 542 } 543 544 static void t7xx_cldma_disable_irq(struct cldma_ctrl *md_ctrl) 545 { 546 t7xx_pcie_mac_clear_int(md_ctrl->t7xx_dev, md_ctrl->hw_info.phy_interrupt_id); 547 } 548 549 static void t7xx_cldma_irq_work_cb(struct cldma_ctrl *md_ctrl) 550 { 551 unsigned long l2_tx_int_msk, l2_rx_int_msk, l2_tx_int, l2_rx_int, val; 552 struct t7xx_cldma_hw *hw_info = &md_ctrl->hw_info; 553 int i; 554 555 /* L2 raw interrupt status */ 556 l2_tx_int = ioread32(hw_info->ap_pdn_base + REG_CLDMA_L2TISAR0); 557 l2_rx_int = ioread32(hw_info->ap_pdn_base + REG_CLDMA_L2RISAR0); 558 l2_tx_int_msk = ioread32(hw_info->ap_pdn_base + REG_CLDMA_L2TIMR0); 559 l2_rx_int_msk = ioread32(hw_info->ap_ao_base + REG_CLDMA_L2RIMR0); 560 l2_tx_int &= ~l2_tx_int_msk; 561 l2_rx_int &= ~l2_rx_int_msk; 562 563 if (l2_tx_int) { 564 if (l2_tx_int & (TQ_ERR_INT_BITMASK | TQ_ACTIVE_START_ERR_INT_BITMASK)) { 565 /* Read and clear L3 TX interrupt status */ 566 val = ioread32(hw_info->ap_pdn_base + REG_CLDMA_L3TISAR0); 567 iowrite32(val, hw_info->ap_pdn_base + REG_CLDMA_L3TISAR0); 568 val = ioread32(hw_info->ap_pdn_base + REG_CLDMA_L3TISAR1); 569 iowrite32(val, hw_info->ap_pdn_base + REG_CLDMA_L3TISAR1); 570 } 571 572 t7xx_cldma_hw_tx_done(hw_info, l2_tx_int); 573 if (l2_tx_int & (TXRX_STATUS_BITMASK | EMPTY_STATUS_BITMASK)) { 574 for_each_set_bit(i, &l2_tx_int, L2_INT_BIT_COUNT) { 575 if (i < CLDMA_TXQ_NUM) { 576 pm_runtime_get(md_ctrl->dev); 577 t7xx_cldma_hw_irq_dis_eq(hw_info, i, MTK_TX); 578 t7xx_cldma_hw_irq_dis_txrx(hw_info, i, MTK_TX); 579 queue_work(md_ctrl->txq[i].worker, 580 &md_ctrl->txq[i].cldma_work); 581 } else { 582 t7xx_cldma_txq_empty_hndl(&md_ctrl->txq[i - CLDMA_TXQ_NUM]); 583 } 584 } 585 } 586 } 587 588 if (l2_rx_int) { 589 if (l2_rx_int & (RQ_ERR_INT_BITMASK | RQ_ACTIVE_START_ERR_INT_BITMASK)) { 590 /* Read and clear L3 RX interrupt status */ 591 val = ioread32(hw_info->ap_pdn_base + REG_CLDMA_L3RISAR0); 592 iowrite32(val, hw_info->ap_pdn_base + REG_CLDMA_L3RISAR0); 593 val = ioread32(hw_info->ap_pdn_base + REG_CLDMA_L3RISAR1); 594 iowrite32(val, hw_info->ap_pdn_base + REG_CLDMA_L3RISAR1); 595 } 596 597 t7xx_cldma_hw_rx_done(hw_info, l2_rx_int); 598 if (l2_rx_int & (TXRX_STATUS_BITMASK | EMPTY_STATUS_BITMASK)) { 599 l2_rx_int |= l2_rx_int >> CLDMA_RXQ_NUM; 600 for_each_set_bit(i, &l2_rx_int, CLDMA_RXQ_NUM) { 601 pm_runtime_get(md_ctrl->dev); 602 t7xx_cldma_hw_irq_dis_eq(hw_info, i, MTK_RX); 603 t7xx_cldma_hw_irq_dis_txrx(hw_info, i, MTK_RX); 604 queue_work(md_ctrl->rxq[i].worker, &md_ctrl->rxq[i].cldma_work); 605 } 606 } 607 } 608 } 609 610 static bool t7xx_cldma_qs_are_active(struct cldma_ctrl *md_ctrl) 611 { 612 struct t7xx_cldma_hw *hw_info = &md_ctrl->hw_info; 613 unsigned int tx_active; 614 unsigned int rx_active; 615 616 if (!pci_device_is_present(to_pci_dev(md_ctrl->dev))) 617 return false; 618 619 tx_active = t7xx_cldma_hw_queue_status(hw_info, CLDMA_ALL_Q, MTK_TX); 620 rx_active = t7xx_cldma_hw_queue_status(hw_info, CLDMA_ALL_Q, MTK_RX); 621 622 return tx_active || rx_active; 623 } 624 625 /** 626 * t7xx_cldma_stop() - Stop CLDMA. 627 * @md_ctrl: CLDMA context structure. 628 * 629 * Stop TX and RX queues. Disable L1 and L2 interrupts. 630 * Clear status registers. 631 * 632 * Return: 633 * * 0 - Success. 634 * * -ERROR - Error code from polling cldma_queues_active. 635 */ 636 int t7xx_cldma_stop(struct cldma_ctrl *md_ctrl) 637 { 638 struct t7xx_cldma_hw *hw_info = &md_ctrl->hw_info; 639 bool active; 640 int i, ret; 641 642 md_ctrl->rxq_active = 0; 643 t7xx_cldma_hw_stop_all_qs(hw_info, MTK_RX); 644 md_ctrl->txq_active = 0; 645 t7xx_cldma_hw_stop_all_qs(hw_info, MTK_TX); 646 md_ctrl->txq_started = 0; 647 t7xx_cldma_disable_irq(md_ctrl); 648 t7xx_cldma_hw_stop(hw_info, MTK_RX); 649 t7xx_cldma_hw_stop(hw_info, MTK_TX); 650 t7xx_cldma_hw_tx_done(hw_info, CLDMA_L2TISAR0_ALL_INT_MASK); 651 t7xx_cldma_hw_rx_done(hw_info, CLDMA_L2RISAR0_ALL_INT_MASK); 652 653 if (md_ctrl->is_late_init) { 654 for (i = 0; i < CLDMA_TXQ_NUM; i++) 655 flush_work(&md_ctrl->txq[i].cldma_work); 656 657 for (i = 0; i < CLDMA_RXQ_NUM; i++) 658 flush_work(&md_ctrl->rxq[i].cldma_work); 659 } 660 661 ret = read_poll_timeout(t7xx_cldma_qs_are_active, active, !active, CHECK_Q_STOP_STEP_US, 662 CHECK_Q_STOP_TIMEOUT_US, true, md_ctrl); 663 if (ret) 664 dev_err(md_ctrl->dev, "Could not stop CLDMA%d queues", md_ctrl->hif_id); 665 666 return ret; 667 } 668 669 static void t7xx_cldma_late_release(struct cldma_ctrl *md_ctrl) 670 { 671 int i; 672 673 if (!md_ctrl->is_late_init) 674 return; 675 676 for (i = 0; i < CLDMA_TXQ_NUM; i++) 677 t7xx_cldma_ring_free(md_ctrl, &md_ctrl->tx_ring[i], DMA_TO_DEVICE); 678 679 for (i = 0; i < CLDMA_RXQ_NUM; i++) 680 t7xx_cldma_ring_free(md_ctrl, &md_ctrl->rx_ring[i], DMA_FROM_DEVICE); 681 682 dma_pool_destroy(md_ctrl->gpd_dmapool); 683 md_ctrl->gpd_dmapool = NULL; 684 md_ctrl->is_late_init = false; 685 } 686 687 void t7xx_cldma_reset(struct cldma_ctrl *md_ctrl) 688 { 689 unsigned long flags; 690 int i; 691 692 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 693 md_ctrl->txq_active = 0; 694 md_ctrl->rxq_active = 0; 695 t7xx_cldma_disable_irq(md_ctrl); 696 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 697 698 for (i = 0; i < CLDMA_TXQ_NUM; i++) { 699 cancel_work_sync(&md_ctrl->txq[i].cldma_work); 700 701 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 702 md_cd_queue_struct_reset(&md_ctrl->txq[i], md_ctrl, MTK_TX, i); 703 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 704 } 705 706 for (i = 0; i < CLDMA_RXQ_NUM; i++) { 707 cancel_work_sync(&md_ctrl->rxq[i].cldma_work); 708 709 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 710 md_cd_queue_struct_reset(&md_ctrl->rxq[i], md_ctrl, MTK_RX, i); 711 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 712 } 713 714 t7xx_cldma_late_release(md_ctrl); 715 } 716 717 /** 718 * t7xx_cldma_start() - Start CLDMA. 719 * @md_ctrl: CLDMA context structure. 720 * 721 * Set TX/RX start address. 722 * Start all RX queues and enable L2 interrupt. 723 */ 724 void t7xx_cldma_start(struct cldma_ctrl *md_ctrl) 725 { 726 unsigned long flags; 727 728 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 729 if (md_ctrl->is_late_init) { 730 struct t7xx_cldma_hw *hw_info = &md_ctrl->hw_info; 731 int i; 732 733 t7xx_cldma_enable_irq(md_ctrl); 734 735 for (i = 0; i < CLDMA_TXQ_NUM; i++) { 736 if (md_ctrl->txq[i].tr_done) 737 t7xx_cldma_hw_set_start_addr(hw_info, i, 738 md_ctrl->txq[i].tr_done->gpd_addr, 739 MTK_TX); 740 } 741 742 for (i = 0; i < CLDMA_RXQ_NUM; i++) { 743 if (md_ctrl->rxq[i].tr_done) 744 t7xx_cldma_hw_set_start_addr(hw_info, i, 745 md_ctrl->rxq[i].tr_done->gpd_addr, 746 MTK_RX); 747 } 748 749 /* Enable L2 interrupt */ 750 t7xx_cldma_hw_start_queue(hw_info, CLDMA_ALL_Q, MTK_RX); 751 t7xx_cldma_hw_start(hw_info); 752 md_ctrl->txq_started = 0; 753 md_ctrl->txq_active |= TXRX_STATUS_BITMASK; 754 md_ctrl->rxq_active |= TXRX_STATUS_BITMASK; 755 } 756 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 757 } 758 759 static void t7xx_cldma_clear_txq(struct cldma_ctrl *md_ctrl, int qnum) 760 { 761 struct cldma_queue *txq = &md_ctrl->txq[qnum]; 762 struct cldma_request *req; 763 struct cldma_gpd *gpd; 764 unsigned long flags; 765 766 spin_lock_irqsave(&txq->ring_lock, flags); 767 t7xx_cldma_q_reset(txq); 768 list_for_each_entry(req, &txq->tr_ring->gpd_ring, entry) { 769 gpd = req->gpd; 770 gpd->flags &= ~GPD_FLAGS_HWO; 771 t7xx_cldma_gpd_set_data_ptr(gpd, 0); 772 gpd->data_buff_len = 0; 773 dev_kfree_skb_any(req->skb); 774 req->skb = NULL; 775 } 776 spin_unlock_irqrestore(&txq->ring_lock, flags); 777 } 778 779 static int t7xx_cldma_clear_rxq(struct cldma_ctrl *md_ctrl, int qnum) 780 { 781 struct cldma_queue *rxq = &md_ctrl->rxq[qnum]; 782 struct cldma_request *req; 783 struct cldma_gpd *gpd; 784 unsigned long flags; 785 int ret = 0; 786 787 spin_lock_irqsave(&rxq->ring_lock, flags); 788 t7xx_cldma_q_reset(rxq); 789 list_for_each_entry(req, &rxq->tr_ring->gpd_ring, entry) { 790 gpd = req->gpd; 791 gpd->flags = GPD_FLAGS_IOC | GPD_FLAGS_HWO; 792 gpd->data_buff_len = 0; 793 794 if (req->skb) { 795 req->skb->len = 0; 796 skb_reset_tail_pointer(req->skb); 797 } 798 } 799 800 list_for_each_entry(req, &rxq->tr_ring->gpd_ring, entry) { 801 if (req->skb) 802 continue; 803 804 ret = t7xx_cldma_alloc_and_map_skb(md_ctrl, req, rxq->tr_ring->pkt_size, GFP_ATOMIC); 805 if (ret) 806 break; 807 808 t7xx_cldma_gpd_set_data_ptr(req->gpd, req->mapped_buff); 809 } 810 spin_unlock_irqrestore(&rxq->ring_lock, flags); 811 812 return ret; 813 } 814 815 void t7xx_cldma_clear_all_qs(struct cldma_ctrl *md_ctrl, enum mtk_txrx tx_rx) 816 { 817 int i; 818 819 if (tx_rx == MTK_TX) { 820 for (i = 0; i < CLDMA_TXQ_NUM; i++) 821 t7xx_cldma_clear_txq(md_ctrl, i); 822 } else { 823 for (i = 0; i < CLDMA_RXQ_NUM; i++) 824 t7xx_cldma_clear_rxq(md_ctrl, i); 825 } 826 } 827 828 void t7xx_cldma_stop_all_qs(struct cldma_ctrl *md_ctrl, enum mtk_txrx tx_rx) 829 { 830 struct t7xx_cldma_hw *hw_info = &md_ctrl->hw_info; 831 unsigned long flags; 832 833 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 834 t7xx_cldma_hw_irq_dis_eq(hw_info, CLDMA_ALL_Q, tx_rx); 835 t7xx_cldma_hw_irq_dis_txrx(hw_info, CLDMA_ALL_Q, tx_rx); 836 if (tx_rx == MTK_RX) 837 md_ctrl->rxq_active &= ~TXRX_STATUS_BITMASK; 838 else 839 md_ctrl->txq_active &= ~TXRX_STATUS_BITMASK; 840 t7xx_cldma_hw_stop_all_qs(hw_info, tx_rx); 841 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 842 } 843 844 static int t7xx_cldma_gpd_handle_tx_request(struct cldma_queue *queue, struct cldma_request *tx_req, 845 struct sk_buff *skb) 846 { 847 struct cldma_ctrl *md_ctrl = queue->md_ctrl; 848 struct cldma_gpd *gpd = tx_req->gpd; 849 unsigned long flags; 850 851 /* Update GPD */ 852 tx_req->mapped_buff = dma_map_single(md_ctrl->dev, skb->data, skb->len, DMA_TO_DEVICE); 853 854 if (dma_mapping_error(md_ctrl->dev, tx_req->mapped_buff)) { 855 dev_err(md_ctrl->dev, "DMA mapping failed\n"); 856 return -ENOMEM; 857 } 858 859 t7xx_cldma_gpd_set_data_ptr(gpd, tx_req->mapped_buff); 860 gpd->data_buff_len = cpu_to_le16(skb->len); 861 862 /* This lock must cover TGPD setting, as even without a resume operation, 863 * CLDMA can send next HWO=1 if last TGPD just finished. 864 */ 865 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 866 if (md_ctrl->txq_active & BIT(queue->index)) 867 gpd->flags |= GPD_FLAGS_HWO; 868 869 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 870 871 tx_req->skb = skb; 872 return 0; 873 } 874 875 /* Called with cldma_lock */ 876 static void t7xx_cldma_hw_start_send(struct cldma_ctrl *md_ctrl, int qno, 877 struct cldma_request *prev_req) 878 { 879 struct t7xx_cldma_hw *hw_info = &md_ctrl->hw_info; 880 881 /* Check whether the device was powered off (CLDMA start address is not set) */ 882 if (!t7xx_cldma_tx_addr_is_set(hw_info, qno)) { 883 t7xx_cldma_hw_init(hw_info); 884 t7xx_cldma_hw_set_start_addr(hw_info, qno, prev_req->gpd_addr, MTK_TX); 885 md_ctrl->txq_started &= ~BIT(qno); 886 } 887 888 if (!t7xx_cldma_hw_queue_status(hw_info, qno, MTK_TX)) { 889 if (md_ctrl->txq_started & BIT(qno)) 890 t7xx_cldma_hw_resume_queue(hw_info, qno, MTK_TX); 891 else 892 t7xx_cldma_hw_start_queue(hw_info, qno, MTK_TX); 893 894 md_ctrl->txq_started |= BIT(qno); 895 } 896 } 897 898 /** 899 * t7xx_cldma_set_recv_skb() - Set the callback to handle RX packets. 900 * @md_ctrl: CLDMA context structure. 901 * @recv_skb: Receiving skb callback. 902 */ 903 void t7xx_cldma_set_recv_skb(struct cldma_ctrl *md_ctrl, 904 int (*recv_skb)(struct cldma_queue *queue, struct sk_buff *skb)) 905 { 906 md_ctrl->recv_skb = recv_skb; 907 } 908 909 /** 910 * t7xx_cldma_send_skb() - Send control data to modem. 911 * @md_ctrl: CLDMA context structure. 912 * @qno: Queue number. 913 * @skb: Socket buffer. 914 * 915 * Return: 916 * * 0 - Success. 917 * * -ENOMEM - Allocation failure. 918 * * -EINVAL - Invalid queue request. 919 * * -EIO - Queue is not active. 920 * * -ETIMEDOUT - Timeout waiting for the device to wake up. 921 */ 922 int t7xx_cldma_send_skb(struct cldma_ctrl *md_ctrl, int qno, struct sk_buff *skb) 923 { 924 struct cldma_request *tx_req; 925 struct cldma_queue *queue; 926 unsigned long flags; 927 int ret; 928 929 if (qno >= CLDMA_TXQ_NUM) 930 return -EINVAL; 931 932 ret = pm_runtime_resume_and_get(md_ctrl->dev); 933 if (ret < 0 && ret != -EACCES) 934 return ret; 935 936 t7xx_pci_disable_sleep(md_ctrl->t7xx_dev); 937 queue = &md_ctrl->txq[qno]; 938 939 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 940 if (!(md_ctrl->txq_active & BIT(qno))) { 941 ret = -EIO; 942 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 943 goto allow_sleep; 944 } 945 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 946 947 do { 948 spin_lock_irqsave(&queue->ring_lock, flags); 949 tx_req = queue->tx_next; 950 if (queue->budget > 0 && !tx_req->skb) { 951 struct list_head *gpd_ring = &queue->tr_ring->gpd_ring; 952 953 queue->budget--; 954 t7xx_cldma_gpd_handle_tx_request(queue, tx_req, skb); 955 queue->tx_next = list_next_entry_circular(tx_req, gpd_ring, entry); 956 spin_unlock_irqrestore(&queue->ring_lock, flags); 957 958 if (!t7xx_pci_sleep_disable_complete(md_ctrl->t7xx_dev)) { 959 ret = -ETIMEDOUT; 960 break; 961 } 962 963 /* Protect the access to the modem for queues operations (resume/start) 964 * which access shared locations by all the queues. 965 * cldma_lock is independent of ring_lock which is per queue. 966 */ 967 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 968 t7xx_cldma_hw_start_send(md_ctrl, qno, tx_req); 969 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 970 971 break; 972 } 973 spin_unlock_irqrestore(&queue->ring_lock, flags); 974 975 if (!t7xx_pci_sleep_disable_complete(md_ctrl->t7xx_dev)) { 976 ret = -ETIMEDOUT; 977 break; 978 } 979 980 if (!t7xx_cldma_hw_queue_status(&md_ctrl->hw_info, qno, MTK_TX)) { 981 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 982 t7xx_cldma_hw_resume_queue(&md_ctrl->hw_info, qno, MTK_TX); 983 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 984 } 985 986 ret = wait_event_interruptible_exclusive(queue->req_wq, queue->budget > 0); 987 } while (!ret); 988 989 allow_sleep: 990 t7xx_pci_enable_sleep(md_ctrl->t7xx_dev); 991 pm_runtime_mark_last_busy(md_ctrl->dev); 992 pm_runtime_put_autosuspend(md_ctrl->dev); 993 return ret; 994 } 995 996 static int t7xx_cldma_late_init(struct cldma_ctrl *md_ctrl) 997 { 998 char dma_pool_name[32]; 999 int i, j, ret; 1000 1001 if (md_ctrl->is_late_init) { 1002 dev_err(md_ctrl->dev, "CLDMA late init was already done\n"); 1003 return -EALREADY; 1004 } 1005 1006 snprintf(dma_pool_name, sizeof(dma_pool_name), "cldma_req_hif%d", md_ctrl->hif_id); 1007 1008 md_ctrl->gpd_dmapool = dma_pool_create(dma_pool_name, md_ctrl->dev, 1009 sizeof(struct cldma_gpd), GPD_DMAPOOL_ALIGN, 0); 1010 if (!md_ctrl->gpd_dmapool) { 1011 dev_err(md_ctrl->dev, "DMA pool alloc fail\n"); 1012 return -ENOMEM; 1013 } 1014 1015 for (i = 0; i < CLDMA_TXQ_NUM; i++) { 1016 ret = t7xx_cldma_tx_ring_init(md_ctrl, &md_ctrl->tx_ring[i]); 1017 if (ret) { 1018 dev_err(md_ctrl->dev, "control TX ring init fail\n"); 1019 goto err_free_tx_ring; 1020 } 1021 } 1022 1023 for (j = 0; j < CLDMA_RXQ_NUM; j++) { 1024 md_ctrl->rx_ring[j].pkt_size = CLDMA_MTU; 1025 1026 if (j == CLDMA_RXQ_NUM - 1) 1027 md_ctrl->rx_ring[j].pkt_size = CLDMA_JUMBO_BUFF_SZ; 1028 1029 ret = t7xx_cldma_rx_ring_init(md_ctrl, &md_ctrl->rx_ring[j]); 1030 if (ret) { 1031 dev_err(md_ctrl->dev, "Control RX ring init fail\n"); 1032 goto err_free_rx_ring; 1033 } 1034 } 1035 1036 for (i = 0; i < CLDMA_TXQ_NUM; i++) 1037 t7xx_cldma_txq_init(&md_ctrl->txq[i]); 1038 1039 for (j = 0; j < CLDMA_RXQ_NUM; j++) 1040 t7xx_cldma_rxq_init(&md_ctrl->rxq[j]); 1041 1042 md_ctrl->is_late_init = true; 1043 return 0; 1044 1045 err_free_rx_ring: 1046 while (j--) 1047 t7xx_cldma_ring_free(md_ctrl, &md_ctrl->rx_ring[j], DMA_FROM_DEVICE); 1048 1049 err_free_tx_ring: 1050 while (i--) 1051 t7xx_cldma_ring_free(md_ctrl, &md_ctrl->tx_ring[i], DMA_TO_DEVICE); 1052 1053 return ret; 1054 } 1055 1056 static void __iomem *t7xx_pcie_addr_transfer(void __iomem *addr, u32 addr_trs1, u32 phy_addr) 1057 { 1058 return addr + phy_addr - addr_trs1; 1059 } 1060 1061 static void t7xx_hw_info_init(struct cldma_ctrl *md_ctrl) 1062 { 1063 struct t7xx_addr_base *pbase = &md_ctrl->t7xx_dev->base_addr; 1064 struct t7xx_cldma_hw *hw_info = &md_ctrl->hw_info; 1065 u32 phy_ao_base, phy_pd_base; 1066 1067 if (md_ctrl->hif_id != CLDMA_ID_MD) 1068 return; 1069 1070 phy_ao_base = CLDMA1_AO_BASE; 1071 phy_pd_base = CLDMA1_PD_BASE; 1072 hw_info->phy_interrupt_id = CLDMA1_INT; 1073 hw_info->hw_mode = MODE_BIT_64; 1074 hw_info->ap_ao_base = t7xx_pcie_addr_transfer(pbase->pcie_ext_reg_base, 1075 pbase->pcie_dev_reg_trsl_addr, phy_ao_base); 1076 hw_info->ap_pdn_base = t7xx_pcie_addr_transfer(pbase->pcie_ext_reg_base, 1077 pbase->pcie_dev_reg_trsl_addr, phy_pd_base); 1078 } 1079 1080 static int t7xx_cldma_default_recv_skb(struct cldma_queue *queue, struct sk_buff *skb) 1081 { 1082 dev_kfree_skb_any(skb); 1083 return 0; 1084 } 1085 1086 int t7xx_cldma_alloc(enum cldma_id hif_id, struct t7xx_pci_dev *t7xx_dev) 1087 { 1088 struct device *dev = &t7xx_dev->pdev->dev; 1089 struct cldma_ctrl *md_ctrl; 1090 1091 md_ctrl = devm_kzalloc(dev, sizeof(*md_ctrl), GFP_KERNEL); 1092 if (!md_ctrl) 1093 return -ENOMEM; 1094 1095 md_ctrl->t7xx_dev = t7xx_dev; 1096 md_ctrl->dev = dev; 1097 md_ctrl->hif_id = hif_id; 1098 md_ctrl->recv_skb = t7xx_cldma_default_recv_skb; 1099 t7xx_hw_info_init(md_ctrl); 1100 t7xx_dev->md->md_ctrl[hif_id] = md_ctrl; 1101 return 0; 1102 } 1103 1104 static void t7xx_cldma_resume_early(struct t7xx_pci_dev *t7xx_dev, void *entity_param) 1105 { 1106 struct cldma_ctrl *md_ctrl = entity_param; 1107 struct t7xx_cldma_hw *hw_info; 1108 unsigned long flags; 1109 int qno_t; 1110 1111 hw_info = &md_ctrl->hw_info; 1112 1113 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 1114 t7xx_cldma_hw_restore(hw_info); 1115 for (qno_t = 0; qno_t < CLDMA_TXQ_NUM; qno_t++) { 1116 t7xx_cldma_hw_set_start_addr(hw_info, qno_t, md_ctrl->txq[qno_t].tx_next->gpd_addr, 1117 MTK_TX); 1118 t7xx_cldma_hw_set_start_addr(hw_info, qno_t, md_ctrl->rxq[qno_t].tr_done->gpd_addr, 1119 MTK_RX); 1120 } 1121 t7xx_cldma_enable_irq(md_ctrl); 1122 t7xx_cldma_hw_start_queue(hw_info, CLDMA_ALL_Q, MTK_RX); 1123 md_ctrl->rxq_active |= TXRX_STATUS_BITMASK; 1124 t7xx_cldma_hw_irq_en_eq(hw_info, CLDMA_ALL_Q, MTK_RX); 1125 t7xx_cldma_hw_irq_en_txrx(hw_info, CLDMA_ALL_Q, MTK_RX); 1126 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 1127 } 1128 1129 static int t7xx_cldma_resume(struct t7xx_pci_dev *t7xx_dev, void *entity_param) 1130 { 1131 struct cldma_ctrl *md_ctrl = entity_param; 1132 unsigned long flags; 1133 1134 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 1135 md_ctrl->txq_active |= TXRX_STATUS_BITMASK; 1136 t7xx_cldma_hw_irq_en_txrx(&md_ctrl->hw_info, CLDMA_ALL_Q, MTK_TX); 1137 t7xx_cldma_hw_irq_en_eq(&md_ctrl->hw_info, CLDMA_ALL_Q, MTK_TX); 1138 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 1139 1140 if (md_ctrl->hif_id == CLDMA_ID_MD) 1141 t7xx_mhccif_mask_clr(t7xx_dev, D2H_SW_INT_MASK); 1142 1143 return 0; 1144 } 1145 1146 static void t7xx_cldma_suspend_late(struct t7xx_pci_dev *t7xx_dev, void *entity_param) 1147 { 1148 struct cldma_ctrl *md_ctrl = entity_param; 1149 struct t7xx_cldma_hw *hw_info; 1150 unsigned long flags; 1151 1152 hw_info = &md_ctrl->hw_info; 1153 1154 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 1155 t7xx_cldma_hw_irq_dis_eq(hw_info, CLDMA_ALL_Q, MTK_RX); 1156 t7xx_cldma_hw_irq_dis_txrx(hw_info, CLDMA_ALL_Q, MTK_RX); 1157 md_ctrl->rxq_active &= ~TXRX_STATUS_BITMASK; 1158 t7xx_cldma_hw_stop_all_qs(hw_info, MTK_RX); 1159 t7xx_cldma_clear_ip_busy(hw_info); 1160 t7xx_cldma_disable_irq(md_ctrl); 1161 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 1162 } 1163 1164 static int t7xx_cldma_suspend(struct t7xx_pci_dev *t7xx_dev, void *entity_param) 1165 { 1166 struct cldma_ctrl *md_ctrl = entity_param; 1167 struct t7xx_cldma_hw *hw_info; 1168 unsigned long flags; 1169 1170 if (md_ctrl->hif_id == CLDMA_ID_MD) 1171 t7xx_mhccif_mask_set(t7xx_dev, D2H_SW_INT_MASK); 1172 1173 hw_info = &md_ctrl->hw_info; 1174 1175 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 1176 t7xx_cldma_hw_irq_dis_eq(hw_info, CLDMA_ALL_Q, MTK_TX); 1177 t7xx_cldma_hw_irq_dis_txrx(hw_info, CLDMA_ALL_Q, MTK_TX); 1178 md_ctrl->txq_active &= ~TXRX_STATUS_BITMASK; 1179 t7xx_cldma_hw_stop_all_qs(hw_info, MTK_TX); 1180 md_ctrl->txq_started = 0; 1181 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 1182 1183 return 0; 1184 } 1185 1186 static int t7xx_cldma_pm_init(struct cldma_ctrl *md_ctrl) 1187 { 1188 md_ctrl->pm_entity = kzalloc(sizeof(*md_ctrl->pm_entity), GFP_KERNEL); 1189 if (!md_ctrl->pm_entity) 1190 return -ENOMEM; 1191 1192 md_ctrl->pm_entity->entity_param = md_ctrl; 1193 1194 if (md_ctrl->hif_id == CLDMA_ID_MD) 1195 md_ctrl->pm_entity->id = PM_ENTITY_ID_CTRL1; 1196 else 1197 md_ctrl->pm_entity->id = PM_ENTITY_ID_CTRL2; 1198 1199 md_ctrl->pm_entity->suspend = t7xx_cldma_suspend; 1200 md_ctrl->pm_entity->suspend_late = t7xx_cldma_suspend_late; 1201 md_ctrl->pm_entity->resume = t7xx_cldma_resume; 1202 md_ctrl->pm_entity->resume_early = t7xx_cldma_resume_early; 1203 1204 return t7xx_pci_pm_entity_register(md_ctrl->t7xx_dev, md_ctrl->pm_entity); 1205 } 1206 1207 static int t7xx_cldma_pm_uninit(struct cldma_ctrl *md_ctrl) 1208 { 1209 if (!md_ctrl->pm_entity) 1210 return -EINVAL; 1211 1212 t7xx_pci_pm_entity_unregister(md_ctrl->t7xx_dev, md_ctrl->pm_entity); 1213 kfree(md_ctrl->pm_entity); 1214 md_ctrl->pm_entity = NULL; 1215 return 0; 1216 } 1217 1218 void t7xx_cldma_hif_hw_init(struct cldma_ctrl *md_ctrl) 1219 { 1220 struct t7xx_cldma_hw *hw_info = &md_ctrl->hw_info; 1221 unsigned long flags; 1222 1223 spin_lock_irqsave(&md_ctrl->cldma_lock, flags); 1224 t7xx_cldma_hw_stop(hw_info, MTK_TX); 1225 t7xx_cldma_hw_stop(hw_info, MTK_RX); 1226 t7xx_cldma_hw_rx_done(hw_info, EMPTY_STATUS_BITMASK | TXRX_STATUS_BITMASK); 1227 t7xx_cldma_hw_tx_done(hw_info, EMPTY_STATUS_BITMASK | TXRX_STATUS_BITMASK); 1228 t7xx_cldma_hw_init(hw_info); 1229 spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags); 1230 } 1231 1232 static irqreturn_t t7xx_cldma_isr_handler(int irq, void *data) 1233 { 1234 struct cldma_ctrl *md_ctrl = data; 1235 u32 interrupt; 1236 1237 interrupt = md_ctrl->hw_info.phy_interrupt_id; 1238 t7xx_pcie_mac_clear_int(md_ctrl->t7xx_dev, interrupt); 1239 t7xx_cldma_irq_work_cb(md_ctrl); 1240 t7xx_pcie_mac_clear_int_status(md_ctrl->t7xx_dev, interrupt); 1241 t7xx_pcie_mac_set_int(md_ctrl->t7xx_dev, interrupt); 1242 return IRQ_HANDLED; 1243 } 1244 1245 static void t7xx_cldma_destroy_wqs(struct cldma_ctrl *md_ctrl) 1246 { 1247 int i; 1248 1249 for (i = 0; i < CLDMA_TXQ_NUM; i++) { 1250 if (md_ctrl->txq[i].worker) { 1251 destroy_workqueue(md_ctrl->txq[i].worker); 1252 md_ctrl->txq[i].worker = NULL; 1253 } 1254 } 1255 1256 for (i = 0; i < CLDMA_RXQ_NUM; i++) { 1257 if (md_ctrl->rxq[i].worker) { 1258 destroy_workqueue(md_ctrl->rxq[i].worker); 1259 md_ctrl->rxq[i].worker = NULL; 1260 } 1261 } 1262 } 1263 1264 /** 1265 * t7xx_cldma_init() - Initialize CLDMA. 1266 * @md_ctrl: CLDMA context structure. 1267 * 1268 * Allocate and initialize device power management entity. 1269 * Initialize HIF TX/RX queue structure. 1270 * Register CLDMA callback ISR with PCIe driver. 1271 * 1272 * Return: 1273 * * 0 - Success. 1274 * * -ERROR - Error code from failure sub-initializations. 1275 */ 1276 int t7xx_cldma_init(struct cldma_ctrl *md_ctrl) 1277 { 1278 struct t7xx_cldma_hw *hw_info = &md_ctrl->hw_info; 1279 int ret, i; 1280 1281 md_ctrl->txq_active = 0; 1282 md_ctrl->rxq_active = 0; 1283 md_ctrl->is_late_init = false; 1284 1285 ret = t7xx_cldma_pm_init(md_ctrl); 1286 if (ret) 1287 return ret; 1288 1289 spin_lock_init(&md_ctrl->cldma_lock); 1290 1291 for (i = 0; i < CLDMA_TXQ_NUM; i++) { 1292 md_cd_queue_struct_init(&md_ctrl->txq[i], md_ctrl, MTK_TX, i); 1293 md_ctrl->txq[i].worker = 1294 alloc_workqueue("md_hif%d_tx%d_worker", 1295 WQ_UNBOUND | WQ_MEM_RECLAIM | (i ? 0 : WQ_HIGHPRI), 1296 1, md_ctrl->hif_id, i); 1297 if (!md_ctrl->txq[i].worker) 1298 goto err_workqueue; 1299 1300 INIT_WORK(&md_ctrl->txq[i].cldma_work, t7xx_cldma_tx_done); 1301 } 1302 1303 for (i = 0; i < CLDMA_RXQ_NUM; i++) { 1304 md_cd_queue_struct_init(&md_ctrl->rxq[i], md_ctrl, MTK_RX, i); 1305 INIT_WORK(&md_ctrl->rxq[i].cldma_work, t7xx_cldma_rx_done); 1306 1307 md_ctrl->rxq[i].worker = alloc_workqueue("md_hif%d_rx%d_worker", 1308 WQ_UNBOUND | WQ_MEM_RECLAIM, 1309 1, md_ctrl->hif_id, i); 1310 if (!md_ctrl->rxq[i].worker) 1311 goto err_workqueue; 1312 } 1313 1314 t7xx_pcie_mac_clear_int(md_ctrl->t7xx_dev, hw_info->phy_interrupt_id); 1315 md_ctrl->t7xx_dev->intr_handler[hw_info->phy_interrupt_id] = t7xx_cldma_isr_handler; 1316 md_ctrl->t7xx_dev->intr_thread[hw_info->phy_interrupt_id] = NULL; 1317 md_ctrl->t7xx_dev->callback_param[hw_info->phy_interrupt_id] = md_ctrl; 1318 t7xx_pcie_mac_clear_int_status(md_ctrl->t7xx_dev, hw_info->phy_interrupt_id); 1319 return 0; 1320 1321 err_workqueue: 1322 t7xx_cldma_destroy_wqs(md_ctrl); 1323 t7xx_cldma_pm_uninit(md_ctrl); 1324 return -ENOMEM; 1325 } 1326 1327 void t7xx_cldma_switch_cfg(struct cldma_ctrl *md_ctrl) 1328 { 1329 t7xx_cldma_late_release(md_ctrl); 1330 t7xx_cldma_late_init(md_ctrl); 1331 } 1332 1333 void t7xx_cldma_exit(struct cldma_ctrl *md_ctrl) 1334 { 1335 t7xx_cldma_stop(md_ctrl); 1336 t7xx_cldma_late_release(md_ctrl); 1337 t7xx_cldma_destroy_wqs(md_ctrl); 1338 t7xx_cldma_pm_uninit(md_ctrl); 1339 } 1340