1 // SPDX-License-Identifier: GPL-2.0+ 2 /* Copyright (c) 2018 Quantenna Communications */ 3 4 #include <linux/kernel.h> 5 #include <linux/firmware.h> 6 #include <linux/pci.h> 7 #include <linux/vmalloc.h> 8 #include <linux/delay.h> 9 #include <linux/interrupt.h> 10 #include <linux/sched.h> 11 #include <linux/completion.h> 12 #include <linux/crc32.h> 13 #include <linux/spinlock.h> 14 #include <linux/circ_buf.h> 15 #include <linux/log2.h> 16 17 #include "pcie_priv.h" 18 #include "pearl_pcie_regs.h" 19 #include "pearl_pcie_ipc.h" 20 #include "qtn_hw_ids.h" 21 #include "core.h" 22 #include "bus.h" 23 #include "shm_ipc.h" 24 #include "debug.h" 25 26 #define PEARL_TX_BD_SIZE_DEFAULT 32 27 #define PEARL_RX_BD_SIZE_DEFAULT 256 28 29 struct qtnf_pearl_bda { 30 __le16 bda_len; 31 __le16 bda_version; 32 __le32 bda_pci_endian; 33 __le32 bda_ep_state; 34 __le32 bda_rc_state; 35 __le32 bda_dma_mask; 36 __le32 bda_msi_addr; 37 __le32 bda_flashsz; 38 u8 bda_boardname[PCIE_BDA_NAMELEN]; 39 __le32 bda_rc_msi_enabled; 40 u8 bda_hhbm_list[PCIE_HHBM_MAX_SIZE]; 41 __le32 bda_dsbw_start_index; 42 __le32 bda_dsbw_end_index; 43 __le32 bda_dsbw_total_bytes; 44 __le32 bda_rc_tx_bd_base; 45 __le32 bda_rc_tx_bd_num; 46 u8 bda_pcie_mac[QTN_ENET_ADDR_LENGTH]; 47 struct qtnf_shm_ipc_region bda_shm_reg1 __aligned(4096); /* host TX */ 48 struct qtnf_shm_ipc_region bda_shm_reg2 __aligned(4096); /* host RX */ 49 } __packed; 50 51 struct qtnf_pearl_tx_bd { 52 __le32 addr; 53 __le32 addr_h; 54 __le32 info; 55 __le32 info_h; 56 } __packed; 57 58 struct qtnf_pearl_rx_bd { 59 __le32 addr; 60 __le32 addr_h; 61 __le32 info; 62 __le32 info_h; 63 __le32 next_ptr; 64 __le32 next_ptr_h; 65 } __packed; 66 67 struct qtnf_pearl_fw_hdr { 68 u8 boardflg[8]; 69 __le32 fwsize; 70 __le32 seqnum; 71 __le32 type; 72 __le32 pktlen; 73 __le32 crc; 74 } __packed; 75 76 struct qtnf_pcie_pearl_state { 77 struct qtnf_pcie_bus_priv base; 78 79 /* lock for irq configuration changes */ 80 spinlock_t irq_lock; 81 82 struct qtnf_pearl_bda __iomem *bda; 83 void __iomem *pcie_reg_base; 84 85 struct qtnf_pearl_tx_bd *tx_bd_vbase; 86 dma_addr_t tx_bd_pbase; 87 88 struct qtnf_pearl_rx_bd *rx_bd_vbase; 89 dma_addr_t rx_bd_pbase; 90 91 dma_addr_t bd_table_paddr; 92 void *bd_table_vaddr; 93 u32 bd_table_len; 94 u32 pcie_irq_mask; 95 u32 pcie_irq_rx_count; 96 u32 pcie_irq_tx_count; 97 u32 pcie_irq_uf_count; 98 }; 99 100 static inline void qtnf_init_hdp_irqs(struct qtnf_pcie_pearl_state *ps) 101 { 102 unsigned long flags; 103 104 spin_lock_irqsave(&ps->irq_lock, flags); 105 ps->pcie_irq_mask = (PCIE_HDP_INT_RX_BITS | PCIE_HDP_INT_TX_BITS); 106 spin_unlock_irqrestore(&ps->irq_lock, flags); 107 } 108 109 static inline void qtnf_enable_hdp_irqs(struct qtnf_pcie_pearl_state *ps) 110 { 111 unsigned long flags; 112 113 spin_lock_irqsave(&ps->irq_lock, flags); 114 writel(ps->pcie_irq_mask, PCIE_HDP_INT_EN(ps->pcie_reg_base)); 115 spin_unlock_irqrestore(&ps->irq_lock, flags); 116 } 117 118 static inline void qtnf_disable_hdp_irqs(struct qtnf_pcie_pearl_state *ps) 119 { 120 unsigned long flags; 121 122 spin_lock_irqsave(&ps->irq_lock, flags); 123 writel(0x0, PCIE_HDP_INT_EN(ps->pcie_reg_base)); 124 spin_unlock_irqrestore(&ps->irq_lock, flags); 125 } 126 127 static inline void qtnf_en_rxdone_irq(struct qtnf_pcie_pearl_state *ps) 128 { 129 unsigned long flags; 130 131 spin_lock_irqsave(&ps->irq_lock, flags); 132 ps->pcie_irq_mask |= PCIE_HDP_INT_RX_BITS; 133 writel(ps->pcie_irq_mask, PCIE_HDP_INT_EN(ps->pcie_reg_base)); 134 spin_unlock_irqrestore(&ps->irq_lock, flags); 135 } 136 137 static inline void qtnf_dis_rxdone_irq(struct qtnf_pcie_pearl_state *ps) 138 { 139 unsigned long flags; 140 141 spin_lock_irqsave(&ps->irq_lock, flags); 142 ps->pcie_irq_mask &= ~PCIE_HDP_INT_RX_BITS; 143 writel(ps->pcie_irq_mask, PCIE_HDP_INT_EN(ps->pcie_reg_base)); 144 spin_unlock_irqrestore(&ps->irq_lock, flags); 145 } 146 147 static inline void qtnf_en_txdone_irq(struct qtnf_pcie_pearl_state *ps) 148 { 149 unsigned long flags; 150 151 spin_lock_irqsave(&ps->irq_lock, flags); 152 ps->pcie_irq_mask |= PCIE_HDP_INT_TX_BITS; 153 writel(ps->pcie_irq_mask, PCIE_HDP_INT_EN(ps->pcie_reg_base)); 154 spin_unlock_irqrestore(&ps->irq_lock, flags); 155 } 156 157 static inline void qtnf_dis_txdone_irq(struct qtnf_pcie_pearl_state *ps) 158 { 159 unsigned long flags; 160 161 spin_lock_irqsave(&ps->irq_lock, flags); 162 ps->pcie_irq_mask &= ~PCIE_HDP_INT_TX_BITS; 163 writel(ps->pcie_irq_mask, PCIE_HDP_INT_EN(ps->pcie_reg_base)); 164 spin_unlock_irqrestore(&ps->irq_lock, flags); 165 } 166 167 static void qtnf_deassert_intx(struct qtnf_pcie_pearl_state *ps) 168 { 169 void __iomem *reg = ps->base.sysctl_bar + PEARL_PCIE_CFG0_OFFSET; 170 u32 cfg; 171 172 cfg = readl(reg); 173 cfg &= ~PEARL_ASSERT_INTX; 174 qtnf_non_posted_write(cfg, reg); 175 } 176 177 static void qtnf_pearl_reset_ep(struct qtnf_pcie_pearl_state *ps) 178 { 179 const u32 data = QTN_PEARL_IPC_IRQ_WORD(QTN_PEARL_LHOST_EP_RESET); 180 void __iomem *reg = ps->base.sysctl_bar + 181 QTN_PEARL_SYSCTL_LHOST_IRQ_OFFSET; 182 183 qtnf_non_posted_write(data, reg); 184 msleep(QTN_EP_RESET_WAIT_MS); 185 pci_restore_state(ps->base.pdev); 186 } 187 188 static void qtnf_pcie_pearl_ipc_gen_ep_int(void *arg) 189 { 190 const struct qtnf_pcie_pearl_state *ps = arg; 191 const u32 data = QTN_PEARL_IPC_IRQ_WORD(QTN_PEARL_LHOST_IPC_IRQ); 192 void __iomem *reg = ps->base.sysctl_bar + 193 QTN_PEARL_SYSCTL_LHOST_IRQ_OFFSET; 194 195 qtnf_non_posted_write(data, reg); 196 } 197 198 static int qtnf_is_state(__le32 __iomem *reg, u32 state) 199 { 200 u32 s = readl(reg); 201 202 return s & state; 203 } 204 205 static void qtnf_set_state(__le32 __iomem *reg, u32 state) 206 { 207 u32 s = readl(reg); 208 209 qtnf_non_posted_write(state | s, reg); 210 } 211 212 static void qtnf_clear_state(__le32 __iomem *reg, u32 state) 213 { 214 u32 s = readl(reg); 215 216 qtnf_non_posted_write(s & ~state, reg); 217 } 218 219 static int qtnf_poll_state(__le32 __iomem *reg, u32 state, u32 delay_in_ms) 220 { 221 u32 timeout = 0; 222 223 while ((qtnf_is_state(reg, state) == 0)) { 224 usleep_range(1000, 1200); 225 if (++timeout > delay_in_ms) 226 return -1; 227 } 228 229 return 0; 230 } 231 232 static int pearl_alloc_bd_table(struct qtnf_pcie_pearl_state *ps) 233 { 234 struct qtnf_pcie_bus_priv *priv = &ps->base; 235 dma_addr_t paddr; 236 void *vaddr; 237 int len; 238 239 len = priv->tx_bd_num * sizeof(struct qtnf_pearl_tx_bd) + 240 priv->rx_bd_num * sizeof(struct qtnf_pearl_rx_bd); 241 242 vaddr = dmam_alloc_coherent(&priv->pdev->dev, len, &paddr, GFP_KERNEL); 243 if (!vaddr) 244 return -ENOMEM; 245 246 /* tx bd */ 247 248 ps->bd_table_vaddr = vaddr; 249 ps->bd_table_paddr = paddr; 250 ps->bd_table_len = len; 251 252 ps->tx_bd_vbase = vaddr; 253 ps->tx_bd_pbase = paddr; 254 255 pr_debug("TX descriptor table: vaddr=0x%p paddr=%pad\n", vaddr, &paddr); 256 257 priv->tx_bd_r_index = 0; 258 priv->tx_bd_w_index = 0; 259 260 /* rx bd */ 261 262 vaddr = ((struct qtnf_pearl_tx_bd *)vaddr) + priv->tx_bd_num; 263 paddr += priv->tx_bd_num * sizeof(struct qtnf_pearl_tx_bd); 264 265 ps->rx_bd_vbase = vaddr; 266 ps->rx_bd_pbase = paddr; 267 268 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 269 writel(QTN_HOST_HI32(paddr), 270 PCIE_HDP_TX_HOST_Q_BASE_H(ps->pcie_reg_base)); 271 #endif 272 writel(QTN_HOST_LO32(paddr), 273 PCIE_HDP_TX_HOST_Q_BASE_L(ps->pcie_reg_base)); 274 writel(priv->rx_bd_num | (sizeof(struct qtnf_pearl_rx_bd)) << 16, 275 PCIE_HDP_TX_HOST_Q_SZ_CTRL(ps->pcie_reg_base)); 276 277 pr_debug("RX descriptor table: vaddr=0x%p paddr=%pad\n", vaddr, &paddr); 278 279 return 0; 280 } 281 282 static int pearl_skb2rbd_attach(struct qtnf_pcie_pearl_state *ps, u16 index) 283 { 284 struct qtnf_pcie_bus_priv *priv = &ps->base; 285 struct qtnf_pearl_rx_bd *rxbd; 286 struct sk_buff *skb; 287 dma_addr_t paddr; 288 289 skb = netdev_alloc_skb_ip_align(NULL, SKB_BUF_SIZE); 290 if (!skb) { 291 priv->rx_skb[index] = NULL; 292 return -ENOMEM; 293 } 294 295 priv->rx_skb[index] = skb; 296 rxbd = &ps->rx_bd_vbase[index]; 297 298 paddr = dma_map_single(&priv->pdev->dev, skb->data, SKB_BUF_SIZE, 299 DMA_FROM_DEVICE); 300 if (dma_mapping_error(&priv->pdev->dev, paddr)) { 301 pr_err("skb DMA mapping error: %pad\n", &paddr); 302 return -ENOMEM; 303 } 304 305 /* keep rx skb paddrs in rx buffer descriptors for cleanup purposes */ 306 rxbd->addr = cpu_to_le32(QTN_HOST_LO32(paddr)); 307 rxbd->addr_h = cpu_to_le32(QTN_HOST_HI32(paddr)); 308 rxbd->info = 0x0; 309 310 priv->rx_bd_w_index = index; 311 312 /* sync up all descriptor updates */ 313 wmb(); 314 315 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 316 writel(QTN_HOST_HI32(paddr), 317 PCIE_HDP_HHBM_BUF_PTR_H(ps->pcie_reg_base)); 318 #endif 319 writel(QTN_HOST_LO32(paddr), 320 PCIE_HDP_HHBM_BUF_PTR(ps->pcie_reg_base)); 321 322 writel(index, PCIE_HDP_TX_HOST_Q_WR_PTR(ps->pcie_reg_base)); 323 return 0; 324 } 325 326 static int pearl_alloc_rx_buffers(struct qtnf_pcie_pearl_state *ps) 327 { 328 u16 i; 329 int ret = 0; 330 331 memset(ps->rx_bd_vbase, 0x0, 332 ps->base.rx_bd_num * sizeof(struct qtnf_pearl_rx_bd)); 333 334 for (i = 0; i < ps->base.rx_bd_num; i++) { 335 ret = pearl_skb2rbd_attach(ps, i); 336 if (ret) 337 break; 338 } 339 340 return ret; 341 } 342 343 /* all rx/tx activity should have ceased before calling this function */ 344 static void qtnf_pearl_free_xfer_buffers(struct qtnf_pcie_pearl_state *ps) 345 { 346 struct qtnf_pcie_bus_priv *priv = &ps->base; 347 struct qtnf_pearl_tx_bd *txbd; 348 struct qtnf_pearl_rx_bd *rxbd; 349 struct sk_buff *skb; 350 dma_addr_t paddr; 351 int i; 352 353 /* free rx buffers */ 354 for (i = 0; i < priv->rx_bd_num; i++) { 355 if (priv->rx_skb && priv->rx_skb[i]) { 356 rxbd = &ps->rx_bd_vbase[i]; 357 skb = priv->rx_skb[i]; 358 paddr = QTN_HOST_ADDR(le32_to_cpu(rxbd->addr_h), 359 le32_to_cpu(rxbd->addr)); 360 dma_unmap_single(&priv->pdev->dev, paddr, 361 SKB_BUF_SIZE, DMA_FROM_DEVICE); 362 dev_kfree_skb_any(skb); 363 priv->rx_skb[i] = NULL; 364 } 365 } 366 367 /* free tx buffers */ 368 for (i = 0; i < priv->tx_bd_num; i++) { 369 if (priv->tx_skb && priv->tx_skb[i]) { 370 txbd = &ps->tx_bd_vbase[i]; 371 skb = priv->tx_skb[i]; 372 paddr = QTN_HOST_ADDR(le32_to_cpu(txbd->addr_h), 373 le32_to_cpu(txbd->addr)); 374 dma_unmap_single(&priv->pdev->dev, paddr, skb->len, 375 DMA_TO_DEVICE); 376 dev_kfree_skb_any(skb); 377 priv->tx_skb[i] = NULL; 378 } 379 } 380 } 381 382 static int pearl_hhbm_init(struct qtnf_pcie_pearl_state *ps) 383 { 384 u32 val; 385 386 val = readl(PCIE_HHBM_CONFIG(ps->pcie_reg_base)); 387 val |= HHBM_CONFIG_SOFT_RESET; 388 writel(val, PCIE_HHBM_CONFIG(ps->pcie_reg_base)); 389 usleep_range(50, 100); 390 val &= ~HHBM_CONFIG_SOFT_RESET; 391 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 392 val |= HHBM_64BIT; 393 #endif 394 writel(val, PCIE_HHBM_CONFIG(ps->pcie_reg_base)); 395 writel(ps->base.rx_bd_num, PCIE_HHBM_Q_LIMIT_REG(ps->pcie_reg_base)); 396 397 return 0; 398 } 399 400 static int qtnf_pcie_pearl_init_xfer(struct qtnf_pcie_pearl_state *ps, 401 unsigned int tx_bd_size, 402 unsigned int rx_bd_size) 403 { 404 struct qtnf_pcie_bus_priv *priv = &ps->base; 405 int ret; 406 u32 val; 407 408 if (tx_bd_size == 0) 409 tx_bd_size = PEARL_TX_BD_SIZE_DEFAULT; 410 411 val = tx_bd_size * sizeof(struct qtnf_pearl_tx_bd); 412 413 if (!is_power_of_2(tx_bd_size) || val > PCIE_HHBM_MAX_SIZE) { 414 pr_warn("invalid tx_bd_size value %u, use default %u\n", 415 tx_bd_size, PEARL_TX_BD_SIZE_DEFAULT); 416 priv->tx_bd_num = PEARL_TX_BD_SIZE_DEFAULT; 417 } else { 418 priv->tx_bd_num = tx_bd_size; 419 } 420 421 if (rx_bd_size == 0) 422 rx_bd_size = PEARL_RX_BD_SIZE_DEFAULT; 423 424 val = rx_bd_size * sizeof(dma_addr_t); 425 426 if (!is_power_of_2(rx_bd_size) || val > PCIE_HHBM_MAX_SIZE) { 427 pr_warn("invalid rx_bd_size value %u, use default %u\n", 428 rx_bd_size, PEARL_RX_BD_SIZE_DEFAULT); 429 priv->rx_bd_num = PEARL_RX_BD_SIZE_DEFAULT; 430 } else { 431 priv->rx_bd_num = rx_bd_size; 432 } 433 434 priv->rx_bd_w_index = 0; 435 priv->rx_bd_r_index = 0; 436 437 ret = pearl_hhbm_init(ps); 438 if (ret) { 439 pr_err("failed to init h/w queues\n"); 440 return ret; 441 } 442 443 ret = qtnf_pcie_alloc_skb_array(priv); 444 if (ret) { 445 pr_err("failed to allocate skb array\n"); 446 return ret; 447 } 448 449 ret = pearl_alloc_bd_table(ps); 450 if (ret) { 451 pr_err("failed to allocate bd table\n"); 452 return ret; 453 } 454 455 ret = pearl_alloc_rx_buffers(ps); 456 if (ret) { 457 pr_err("failed to allocate rx buffers\n"); 458 return ret; 459 } 460 461 return ret; 462 } 463 464 static void qtnf_pearl_data_tx_reclaim(struct qtnf_pcie_pearl_state *ps) 465 { 466 struct qtnf_pcie_bus_priv *priv = &ps->base; 467 struct qtnf_pearl_tx_bd *txbd; 468 struct sk_buff *skb; 469 unsigned long flags; 470 dma_addr_t paddr; 471 u32 tx_done_index; 472 int count = 0; 473 int i; 474 475 spin_lock_irqsave(&priv->tx_reclaim_lock, flags); 476 477 tx_done_index = readl(PCIE_HDP_RX0DMA_CNT(ps->pcie_reg_base)) 478 & (priv->tx_bd_num - 1); 479 480 i = priv->tx_bd_r_index; 481 482 while (CIRC_CNT(tx_done_index, i, priv->tx_bd_num)) { 483 skb = priv->tx_skb[i]; 484 if (likely(skb)) { 485 txbd = &ps->tx_bd_vbase[i]; 486 paddr = QTN_HOST_ADDR(le32_to_cpu(txbd->addr_h), 487 le32_to_cpu(txbd->addr)); 488 dma_unmap_single(&priv->pdev->dev, paddr, skb->len, 489 DMA_TO_DEVICE); 490 491 if (skb->dev) { 492 dev_sw_netstats_tx_add(skb->dev, 1, skb->len); 493 if (unlikely(priv->tx_stopped)) { 494 qtnf_wake_all_queues(skb->dev); 495 priv->tx_stopped = 0; 496 } 497 } 498 499 dev_kfree_skb_any(skb); 500 } 501 502 priv->tx_skb[i] = NULL; 503 count++; 504 505 if (++i >= priv->tx_bd_num) 506 i = 0; 507 } 508 509 priv->tx_reclaim_done += count; 510 priv->tx_reclaim_req++; 511 priv->tx_bd_r_index = i; 512 513 spin_unlock_irqrestore(&priv->tx_reclaim_lock, flags); 514 } 515 516 static int qtnf_tx_queue_ready(struct qtnf_pcie_pearl_state *ps) 517 { 518 struct qtnf_pcie_bus_priv *priv = &ps->base; 519 520 if (!CIRC_SPACE(priv->tx_bd_w_index, priv->tx_bd_r_index, 521 priv->tx_bd_num)) { 522 qtnf_pearl_data_tx_reclaim(ps); 523 524 if (!CIRC_SPACE(priv->tx_bd_w_index, priv->tx_bd_r_index, 525 priv->tx_bd_num)) { 526 pr_warn_ratelimited("reclaim full Tx queue\n"); 527 priv->tx_full_count++; 528 return 0; 529 } 530 } 531 532 return 1; 533 } 534 535 static int qtnf_pcie_skb_send(struct qtnf_bus *bus, struct sk_buff *skb) 536 { 537 struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus); 538 struct qtnf_pcie_bus_priv *priv = &ps->base; 539 dma_addr_t txbd_paddr, skb_paddr; 540 struct qtnf_pearl_tx_bd *txbd; 541 unsigned long flags; 542 int len, i; 543 u32 info; 544 int ret = 0; 545 546 spin_lock_irqsave(&priv->tx_lock, flags); 547 548 if (!qtnf_tx_queue_ready(ps)) { 549 if (skb->dev) { 550 netif_tx_stop_all_queues(skb->dev); 551 priv->tx_stopped = 1; 552 } 553 554 spin_unlock_irqrestore(&priv->tx_lock, flags); 555 return NETDEV_TX_BUSY; 556 } 557 558 i = priv->tx_bd_w_index; 559 priv->tx_skb[i] = skb; 560 len = skb->len; 561 562 skb_paddr = dma_map_single(&priv->pdev->dev, skb->data, skb->len, 563 DMA_TO_DEVICE); 564 if (dma_mapping_error(&priv->pdev->dev, skb_paddr)) { 565 pr_err("skb DMA mapping error: %pad\n", &skb_paddr); 566 ret = -ENOMEM; 567 goto tx_done; 568 } 569 570 txbd = &ps->tx_bd_vbase[i]; 571 txbd->addr = cpu_to_le32(QTN_HOST_LO32(skb_paddr)); 572 txbd->addr_h = cpu_to_le32(QTN_HOST_HI32(skb_paddr)); 573 574 info = (len & QTN_PCIE_TX_DESC_LEN_MASK) << QTN_PCIE_TX_DESC_LEN_SHIFT; 575 txbd->info = cpu_to_le32(info); 576 577 /* sync up all descriptor updates before passing them to EP */ 578 dma_wmb(); 579 580 /* write new TX descriptor to PCIE_RX_FIFO on EP */ 581 txbd_paddr = ps->tx_bd_pbase + i * sizeof(struct qtnf_pearl_tx_bd); 582 583 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 584 writel(QTN_HOST_HI32(txbd_paddr), 585 PCIE_HDP_HOST_WR_DESC0_H(ps->pcie_reg_base)); 586 #endif 587 writel(QTN_HOST_LO32(txbd_paddr), 588 PCIE_HDP_HOST_WR_DESC0(ps->pcie_reg_base)); 589 590 if (++i >= priv->tx_bd_num) 591 i = 0; 592 593 priv->tx_bd_w_index = i; 594 595 tx_done: 596 if (ret) { 597 pr_err_ratelimited("drop skb\n"); 598 if (skb->dev) 599 skb->dev->stats.tx_dropped++; 600 dev_kfree_skb_any(skb); 601 } 602 603 priv->tx_done_count++; 604 spin_unlock_irqrestore(&priv->tx_lock, flags); 605 606 qtnf_pearl_data_tx_reclaim(ps); 607 608 return NETDEV_TX_OK; 609 } 610 611 static int qtnf_pcie_data_tx(struct qtnf_bus *bus, struct sk_buff *skb, 612 unsigned int macid, unsigned int vifid) 613 { 614 return qtnf_pcie_skb_send(bus, skb); 615 } 616 617 static int qtnf_pcie_data_tx_meta(struct qtnf_bus *bus, struct sk_buff *skb, 618 unsigned int macid, unsigned int vifid) 619 { 620 struct qtnf_frame_meta_info *meta; 621 int tail_need = sizeof(*meta) - skb_tailroom(skb); 622 int ret; 623 624 if (tail_need > 0 && pskb_expand_head(skb, 0, tail_need, GFP_ATOMIC)) { 625 skb->dev->stats.tx_dropped++; 626 dev_kfree_skb_any(skb); 627 return NETDEV_TX_OK; 628 } 629 630 meta = skb_put(skb, sizeof(*meta)); 631 meta->magic_s = HBM_FRAME_META_MAGIC_PATTERN_S; 632 meta->magic_e = HBM_FRAME_META_MAGIC_PATTERN_E; 633 meta->macid = macid; 634 meta->ifidx = vifid; 635 636 ret = qtnf_pcie_skb_send(bus, skb); 637 if (unlikely(ret == NETDEV_TX_BUSY)) 638 __skb_trim(skb, skb->len - sizeof(*meta)); 639 640 return ret; 641 } 642 643 static irqreturn_t qtnf_pcie_pearl_interrupt(int irq, void *data) 644 { 645 struct qtnf_bus *bus = (struct qtnf_bus *)data; 646 struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus); 647 struct qtnf_pcie_bus_priv *priv = &ps->base; 648 u32 status; 649 650 priv->pcie_irq_count++; 651 status = readl(PCIE_HDP_INT_STATUS(ps->pcie_reg_base)); 652 653 qtnf_shm_ipc_irq_handler(&priv->shm_ipc_ep_in); 654 qtnf_shm_ipc_irq_handler(&priv->shm_ipc_ep_out); 655 656 if (!(status & ps->pcie_irq_mask)) 657 goto irq_done; 658 659 if (status & PCIE_HDP_INT_RX_BITS) 660 ps->pcie_irq_rx_count++; 661 662 if (status & PCIE_HDP_INT_TX_BITS) 663 ps->pcie_irq_tx_count++; 664 665 if (status & PCIE_HDP_INT_HHBM_UF) 666 ps->pcie_irq_uf_count++; 667 668 if (status & PCIE_HDP_INT_RX_BITS) { 669 qtnf_dis_rxdone_irq(ps); 670 napi_schedule(&bus->mux_napi); 671 } 672 673 if (status & PCIE_HDP_INT_TX_BITS) { 674 qtnf_dis_txdone_irq(ps); 675 tasklet_hi_schedule(&priv->reclaim_tq); 676 } 677 678 irq_done: 679 /* H/W workaround: clean all bits, not only enabled */ 680 qtnf_non_posted_write(~0U, PCIE_HDP_INT_STATUS(ps->pcie_reg_base)); 681 682 if (!priv->msi_enabled) 683 qtnf_deassert_intx(ps); 684 685 return IRQ_HANDLED; 686 } 687 688 static int qtnf_rx_data_ready(struct qtnf_pcie_pearl_state *ps) 689 { 690 u16 index = ps->base.rx_bd_r_index; 691 struct qtnf_pearl_rx_bd *rxbd; 692 u32 descw; 693 694 rxbd = &ps->rx_bd_vbase[index]; 695 descw = le32_to_cpu(rxbd->info); 696 697 if (descw & QTN_TXDONE_MASK) 698 return 1; 699 700 return 0; 701 } 702 703 static int qtnf_pcie_pearl_rx_poll(struct napi_struct *napi, int budget) 704 { 705 struct qtnf_bus *bus = container_of(napi, struct qtnf_bus, mux_napi); 706 struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus); 707 struct qtnf_pcie_bus_priv *priv = &ps->base; 708 struct net_device *ndev = NULL; 709 struct sk_buff *skb = NULL; 710 int processed = 0; 711 struct qtnf_pearl_rx_bd *rxbd; 712 dma_addr_t skb_paddr; 713 int consume; 714 u32 descw; 715 u32 psize; 716 u16 r_idx; 717 u16 w_idx; 718 int ret; 719 720 while (processed < budget) { 721 if (!qtnf_rx_data_ready(ps)) 722 goto rx_out; 723 724 r_idx = priv->rx_bd_r_index; 725 rxbd = &ps->rx_bd_vbase[r_idx]; 726 descw = le32_to_cpu(rxbd->info); 727 728 skb = priv->rx_skb[r_idx]; 729 psize = QTN_GET_LEN(descw); 730 consume = 1; 731 732 if (!(descw & QTN_TXDONE_MASK)) { 733 pr_warn("skip invalid rxbd[%d]\n", r_idx); 734 consume = 0; 735 } 736 737 if (!skb) { 738 pr_warn("skip missing rx_skb[%d]\n", r_idx); 739 consume = 0; 740 } 741 742 if (skb && (skb_tailroom(skb) < psize)) { 743 pr_err("skip packet with invalid length: %u > %u\n", 744 psize, skb_tailroom(skb)); 745 consume = 0; 746 } 747 748 if (skb) { 749 skb_paddr = QTN_HOST_ADDR(le32_to_cpu(rxbd->addr_h), 750 le32_to_cpu(rxbd->addr)); 751 dma_unmap_single(&priv->pdev->dev, skb_paddr, 752 SKB_BUF_SIZE, DMA_FROM_DEVICE); 753 } 754 755 if (consume) { 756 skb_put(skb, psize); 757 ndev = qtnf_classify_skb(bus, skb); 758 if (likely(ndev)) { 759 dev_sw_netstats_rx_add(ndev, skb->len); 760 skb->protocol = eth_type_trans(skb, ndev); 761 napi_gro_receive(napi, skb); 762 } else { 763 pr_debug("drop untagged skb\n"); 764 bus->mux_dev.stats.rx_dropped++; 765 dev_kfree_skb_any(skb); 766 } 767 } else { 768 if (skb) { 769 bus->mux_dev.stats.rx_dropped++; 770 dev_kfree_skb_any(skb); 771 } 772 } 773 774 priv->rx_skb[r_idx] = NULL; 775 if (++r_idx >= priv->rx_bd_num) 776 r_idx = 0; 777 778 priv->rx_bd_r_index = r_idx; 779 780 /* repalce processed buffer by a new one */ 781 w_idx = priv->rx_bd_w_index; 782 while (CIRC_SPACE(priv->rx_bd_w_index, priv->rx_bd_r_index, 783 priv->rx_bd_num) > 0) { 784 if (++w_idx >= priv->rx_bd_num) 785 w_idx = 0; 786 787 ret = pearl_skb2rbd_attach(ps, w_idx); 788 if (ret) { 789 pr_err("failed to allocate new rx_skb[%d]\n", 790 w_idx); 791 break; 792 } 793 } 794 795 processed++; 796 } 797 798 rx_out: 799 if (processed < budget) { 800 napi_complete(napi); 801 qtnf_en_rxdone_irq(ps); 802 } 803 804 return processed; 805 } 806 807 static void 808 qtnf_pcie_data_tx_timeout(struct qtnf_bus *bus, struct net_device *ndev) 809 { 810 struct qtnf_pcie_pearl_state *ps = (void *)get_bus_priv(bus); 811 812 tasklet_hi_schedule(&ps->base.reclaim_tq); 813 } 814 815 static void qtnf_pcie_data_rx_start(struct qtnf_bus *bus) 816 { 817 struct qtnf_pcie_pearl_state *ps = (void *)get_bus_priv(bus); 818 819 qtnf_enable_hdp_irqs(ps); 820 napi_enable(&bus->mux_napi); 821 } 822 823 static void qtnf_pcie_data_rx_stop(struct qtnf_bus *bus) 824 { 825 struct qtnf_pcie_pearl_state *ps = (void *)get_bus_priv(bus); 826 827 napi_disable(&bus->mux_napi); 828 qtnf_disable_hdp_irqs(ps); 829 } 830 831 static void qtnf_pearl_tx_use_meta_info_set(struct qtnf_bus *bus, bool use_meta) 832 { 833 if (use_meta) 834 bus->bus_ops->data_tx = qtnf_pcie_data_tx_meta; 835 else 836 bus->bus_ops->data_tx = qtnf_pcie_data_tx; 837 } 838 839 static struct qtnf_bus_ops qtnf_pcie_pearl_bus_ops = { 840 /* control path methods */ 841 .control_tx = qtnf_pcie_control_tx, 842 843 /* data path methods */ 844 .data_tx = qtnf_pcie_data_tx, 845 .data_tx_timeout = qtnf_pcie_data_tx_timeout, 846 .data_tx_use_meta_set = qtnf_pearl_tx_use_meta_info_set, 847 .data_rx_start = qtnf_pcie_data_rx_start, 848 .data_rx_stop = qtnf_pcie_data_rx_stop, 849 }; 850 851 static int qtnf_dbg_irq_stats(struct seq_file *s, void *data) 852 { 853 struct qtnf_bus *bus = dev_get_drvdata(s->private); 854 struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus); 855 u32 reg = readl(PCIE_HDP_INT_EN(ps->pcie_reg_base)); 856 u32 status; 857 858 seq_printf(s, "pcie_irq_count(%u)\n", ps->base.pcie_irq_count); 859 seq_printf(s, "pcie_irq_tx_count(%u)\n", ps->pcie_irq_tx_count); 860 status = reg & PCIE_HDP_INT_TX_BITS; 861 seq_printf(s, "pcie_irq_tx_status(%s)\n", 862 (status == PCIE_HDP_INT_TX_BITS) ? "EN" : "DIS"); 863 seq_printf(s, "pcie_irq_rx_count(%u)\n", ps->pcie_irq_rx_count); 864 status = reg & PCIE_HDP_INT_RX_BITS; 865 seq_printf(s, "pcie_irq_rx_status(%s)\n", 866 (status == PCIE_HDP_INT_RX_BITS) ? "EN" : "DIS"); 867 seq_printf(s, "pcie_irq_uf_count(%u)\n", ps->pcie_irq_uf_count); 868 status = reg & PCIE_HDP_INT_HHBM_UF; 869 seq_printf(s, "pcie_irq_hhbm_uf_status(%s)\n", 870 (status == PCIE_HDP_INT_HHBM_UF) ? "EN" : "DIS"); 871 872 return 0; 873 } 874 875 static int qtnf_dbg_hdp_stats(struct seq_file *s, void *data) 876 { 877 struct qtnf_bus *bus = dev_get_drvdata(s->private); 878 struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus); 879 struct qtnf_pcie_bus_priv *priv = &ps->base; 880 881 seq_printf(s, "tx_full_count(%u)\n", priv->tx_full_count); 882 seq_printf(s, "tx_done_count(%u)\n", priv->tx_done_count); 883 seq_printf(s, "tx_reclaim_done(%u)\n", priv->tx_reclaim_done); 884 seq_printf(s, "tx_reclaim_req(%u)\n", priv->tx_reclaim_req); 885 886 seq_printf(s, "tx_bd_r_index(%u)\n", priv->tx_bd_r_index); 887 seq_printf(s, "tx_bd_p_index(%u)\n", 888 readl(PCIE_HDP_RX0DMA_CNT(ps->pcie_reg_base)) 889 & (priv->tx_bd_num - 1)); 890 seq_printf(s, "tx_bd_w_index(%u)\n", priv->tx_bd_w_index); 891 seq_printf(s, "tx queue len(%u)\n", 892 CIRC_CNT(priv->tx_bd_w_index, priv->tx_bd_r_index, 893 priv->tx_bd_num)); 894 895 seq_printf(s, "rx_bd_r_index(%u)\n", priv->rx_bd_r_index); 896 seq_printf(s, "rx_bd_p_index(%u)\n", 897 readl(PCIE_HDP_TX0DMA_CNT(ps->pcie_reg_base)) 898 & (priv->rx_bd_num - 1)); 899 seq_printf(s, "rx_bd_w_index(%u)\n", priv->rx_bd_w_index); 900 seq_printf(s, "rx alloc queue len(%u)\n", 901 CIRC_SPACE(priv->rx_bd_w_index, priv->rx_bd_r_index, 902 priv->rx_bd_num)); 903 904 return 0; 905 } 906 907 static int qtnf_ep_fw_send(struct pci_dev *pdev, uint32_t size, 908 int blk, const u8 *pblk, const u8 *fw) 909 { 910 struct qtnf_bus *bus = pci_get_drvdata(pdev); 911 912 struct qtnf_pearl_fw_hdr *hdr; 913 u8 *pdata; 914 915 int hds = sizeof(*hdr); 916 struct sk_buff *skb = NULL; 917 int len = 0; 918 int ret; 919 920 skb = __dev_alloc_skb(QTN_PCIE_FW_BUFSZ, GFP_KERNEL); 921 if (!skb) 922 return -ENOMEM; 923 924 skb->len = QTN_PCIE_FW_BUFSZ; 925 skb->dev = NULL; 926 927 hdr = (struct qtnf_pearl_fw_hdr *)skb->data; 928 memcpy(hdr->boardflg, QTN_PCIE_BOARDFLG, strlen(QTN_PCIE_BOARDFLG)); 929 hdr->fwsize = cpu_to_le32(size); 930 hdr->seqnum = cpu_to_le32(blk); 931 932 if (blk) 933 hdr->type = cpu_to_le32(QTN_FW_DSUB); 934 else 935 hdr->type = cpu_to_le32(QTN_FW_DBEGIN); 936 937 pdata = skb->data + hds; 938 939 len = QTN_PCIE_FW_BUFSZ - hds; 940 if (pblk >= (fw + size - len)) { 941 len = fw + size - pblk; 942 hdr->type = cpu_to_le32(QTN_FW_DEND); 943 } 944 945 hdr->pktlen = cpu_to_le32(len); 946 memcpy(pdata, pblk, len); 947 hdr->crc = cpu_to_le32(~crc32(0, pdata, len)); 948 949 ret = qtnf_pcie_skb_send(bus, skb); 950 951 return (ret == NETDEV_TX_OK) ? len : 0; 952 } 953 954 static int 955 qtnf_ep_fw_load(struct qtnf_pcie_pearl_state *ps, const u8 *fw, u32 fw_size) 956 { 957 int blk_size = QTN_PCIE_FW_BUFSZ - sizeof(struct qtnf_pearl_fw_hdr); 958 int blk_count = fw_size / blk_size + ((fw_size % blk_size) ? 1 : 0); 959 const u8 *pblk = fw; 960 int threshold = 0; 961 int blk = 0; 962 int len; 963 964 pr_debug("FW upload started: fw_addr=0x%p size=%d\n", fw, fw_size); 965 966 while (blk < blk_count) { 967 if (++threshold > 10000) { 968 pr_err("FW upload failed: too many retries\n"); 969 return -ETIMEDOUT; 970 } 971 972 len = qtnf_ep_fw_send(ps->base.pdev, fw_size, blk, pblk, fw); 973 if (len <= 0) 974 continue; 975 976 if (!((blk + 1) & QTN_PCIE_FW_DLMASK) || 977 (blk == (blk_count - 1))) { 978 qtnf_set_state(&ps->bda->bda_rc_state, 979 QTN_RC_FW_SYNC); 980 if (qtnf_poll_state(&ps->bda->bda_ep_state, 981 QTN_EP_FW_SYNC, 982 QTN_FW_DL_TIMEOUT_MS)) { 983 pr_err("FW upload failed: SYNC timed out\n"); 984 return -ETIMEDOUT; 985 } 986 987 qtnf_clear_state(&ps->bda->bda_ep_state, 988 QTN_EP_FW_SYNC); 989 990 if (qtnf_is_state(&ps->bda->bda_ep_state, 991 QTN_EP_FW_RETRY)) { 992 if (blk == (blk_count - 1)) { 993 int last_round = 994 blk_count & QTN_PCIE_FW_DLMASK; 995 blk -= last_round; 996 pblk -= ((last_round - 1) * 997 blk_size + len); 998 } else { 999 blk -= QTN_PCIE_FW_DLMASK; 1000 pblk -= QTN_PCIE_FW_DLMASK * blk_size; 1001 } 1002 1003 qtnf_clear_state(&ps->bda->bda_ep_state, 1004 QTN_EP_FW_RETRY); 1005 1006 pr_warn("FW upload retry: block #%d\n", blk); 1007 continue; 1008 } 1009 1010 qtnf_pearl_data_tx_reclaim(ps); 1011 } 1012 1013 pblk += len; 1014 blk++; 1015 } 1016 1017 pr_debug("FW upload completed: totally sent %d blocks\n", blk); 1018 return 0; 1019 } 1020 1021 static void qtnf_pearl_fw_work_handler(struct work_struct *work) 1022 { 1023 struct qtnf_bus *bus = container_of(work, struct qtnf_bus, fw_work); 1024 struct qtnf_pcie_pearl_state *ps = (void *)get_bus_priv(bus); 1025 u32 state = QTN_RC_FW_LOADRDY | QTN_RC_FW_QLINK; 1026 const char *fwname = QTN_PCI_PEARL_FW_NAME; 1027 struct pci_dev *pdev = ps->base.pdev; 1028 const struct firmware *fw; 1029 int ret; 1030 1031 if (ps->base.flashboot) { 1032 state |= QTN_RC_FW_FLASHBOOT; 1033 } else { 1034 ret = request_firmware(&fw, fwname, &pdev->dev); 1035 if (ret < 0) { 1036 pr_err("failed to get firmware %s\n", fwname); 1037 goto fw_load_exit; 1038 } 1039 } 1040 1041 qtnf_set_state(&ps->bda->bda_rc_state, state); 1042 1043 if (qtnf_poll_state(&ps->bda->bda_ep_state, QTN_EP_FW_LOADRDY, 1044 QTN_FW_DL_TIMEOUT_MS)) { 1045 pr_err("card is not ready\n"); 1046 1047 if (!ps->base.flashboot) 1048 release_firmware(fw); 1049 1050 goto fw_load_exit; 1051 } 1052 1053 qtnf_clear_state(&ps->bda->bda_ep_state, QTN_EP_FW_LOADRDY); 1054 1055 if (ps->base.flashboot) { 1056 pr_info("booting firmware from flash\n"); 1057 1058 } else { 1059 pr_info("starting firmware upload: %s\n", fwname); 1060 1061 ret = qtnf_ep_fw_load(ps, fw->data, fw->size); 1062 release_firmware(fw); 1063 if (ret) { 1064 pr_err("firmware upload error\n"); 1065 goto fw_load_exit; 1066 } 1067 } 1068 1069 if (qtnf_poll_state(&ps->bda->bda_ep_state, QTN_EP_FW_DONE, 1070 QTN_FW_DL_TIMEOUT_MS)) { 1071 pr_err("firmware bringup timed out\n"); 1072 goto fw_load_exit; 1073 } 1074 1075 if (qtnf_poll_state(&ps->bda->bda_ep_state, 1076 QTN_EP_FW_QLINK_DONE, QTN_FW_QLINK_TIMEOUT_MS)) { 1077 pr_err("firmware runtime failure\n"); 1078 goto fw_load_exit; 1079 } 1080 1081 pr_info("firmware is up and running\n"); 1082 1083 ret = qtnf_pcie_fw_boot_done(bus); 1084 if (ret) 1085 goto fw_load_exit; 1086 1087 qtnf_debugfs_add_entry(bus, "hdp_stats", qtnf_dbg_hdp_stats); 1088 qtnf_debugfs_add_entry(bus, "irq_stats", qtnf_dbg_irq_stats); 1089 1090 fw_load_exit: 1091 put_device(&pdev->dev); 1092 } 1093 1094 static void qtnf_pearl_reclaim_tasklet_fn(struct tasklet_struct *t) 1095 { 1096 struct qtnf_pcie_pearl_state *ps = from_tasklet(ps, t, base.reclaim_tq); 1097 1098 qtnf_pearl_data_tx_reclaim(ps); 1099 qtnf_en_txdone_irq(ps); 1100 } 1101 1102 static u64 qtnf_pearl_dma_mask_get(void) 1103 { 1104 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT 1105 return DMA_BIT_MASK(64); 1106 #else 1107 return DMA_BIT_MASK(32); 1108 #endif 1109 } 1110 1111 static int qtnf_pcie_pearl_probe(struct qtnf_bus *bus, unsigned int tx_bd_size, 1112 unsigned int rx_bd_size) 1113 { 1114 struct qtnf_shm_ipc_int ipc_int; 1115 struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus); 1116 struct pci_dev *pdev = ps->base.pdev; 1117 int ret; 1118 1119 bus->bus_ops = &qtnf_pcie_pearl_bus_ops; 1120 spin_lock_init(&ps->irq_lock); 1121 INIT_WORK(&bus->fw_work, qtnf_pearl_fw_work_handler); 1122 1123 ps->pcie_reg_base = ps->base.dmareg_bar; 1124 ps->bda = ps->base.epmem_bar; 1125 writel(ps->base.msi_enabled, &ps->bda->bda_rc_msi_enabled); 1126 1127 ret = qtnf_pcie_pearl_init_xfer(ps, tx_bd_size, rx_bd_size); 1128 if (ret) { 1129 pr_err("PCIE xfer init failed\n"); 1130 return ret; 1131 } 1132 1133 /* init default irq settings */ 1134 qtnf_init_hdp_irqs(ps); 1135 1136 /* start with disabled irqs */ 1137 qtnf_disable_hdp_irqs(ps); 1138 1139 ret = devm_request_irq(&pdev->dev, pdev->irq, 1140 &qtnf_pcie_pearl_interrupt, 0, 1141 "qtnf_pearl_irq", (void *)bus); 1142 if (ret) { 1143 pr_err("failed to request pcie irq %d\n", pdev->irq); 1144 qtnf_pearl_free_xfer_buffers(ps); 1145 return ret; 1146 } 1147 1148 tasklet_setup(&ps->base.reclaim_tq, qtnf_pearl_reclaim_tasklet_fn); 1149 netif_napi_add(&bus->mux_dev, &bus->mux_napi, 1150 qtnf_pcie_pearl_rx_poll, 10); 1151 1152 ipc_int.fn = qtnf_pcie_pearl_ipc_gen_ep_int; 1153 ipc_int.arg = ps; 1154 qtnf_pcie_init_shm_ipc(&ps->base, &ps->bda->bda_shm_reg1, 1155 &ps->bda->bda_shm_reg2, &ipc_int); 1156 1157 return 0; 1158 } 1159 1160 static void qtnf_pcie_pearl_remove(struct qtnf_bus *bus) 1161 { 1162 struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus); 1163 1164 qtnf_pearl_reset_ep(ps); 1165 qtnf_pearl_free_xfer_buffers(ps); 1166 } 1167 1168 #ifdef CONFIG_PM_SLEEP 1169 static int qtnf_pcie_pearl_suspend(struct qtnf_bus *bus) 1170 { 1171 return -EOPNOTSUPP; 1172 } 1173 1174 static int qtnf_pcie_pearl_resume(struct qtnf_bus *bus) 1175 { 1176 return 0; 1177 } 1178 #endif 1179 1180 struct qtnf_bus *qtnf_pcie_pearl_alloc(struct pci_dev *pdev) 1181 { 1182 struct qtnf_bus *bus; 1183 struct qtnf_pcie_pearl_state *ps; 1184 1185 bus = devm_kzalloc(&pdev->dev, sizeof(*bus) + sizeof(*ps), GFP_KERNEL); 1186 if (!bus) 1187 return NULL; 1188 1189 ps = get_bus_priv(bus); 1190 ps->base.probe_cb = qtnf_pcie_pearl_probe; 1191 ps->base.remove_cb = qtnf_pcie_pearl_remove; 1192 ps->base.dma_mask_get_cb = qtnf_pearl_dma_mask_get; 1193 #ifdef CONFIG_PM_SLEEP 1194 ps->base.resume_cb = qtnf_pcie_pearl_resume; 1195 ps->base.suspend_cb = qtnf_pcie_pearl_suspend; 1196 #endif 1197 1198 return bus; 1199 } 1200