1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* Copyright(c) 2018-2019 Realtek Corporation 3 */ 4 5 #include <linux/module.h> 6 #include <linux/pci.h> 7 #include "main.h" 8 #include "pci.h" 9 #include "reg.h" 10 #include "tx.h" 11 #include "rx.h" 12 #include "fw.h" 13 #include "ps.h" 14 #include "debug.h" 15 16 static bool rtw_disable_msi; 17 module_param_named(disable_msi, rtw_disable_msi, bool, 0644); 18 MODULE_PARM_DESC(disable_msi, "Set Y to disable MSI interrupt support"); 19 20 static u32 rtw_pci_tx_queue_idx_addr[] = { 21 [RTW_TX_QUEUE_BK] = RTK_PCI_TXBD_IDX_BKQ, 22 [RTW_TX_QUEUE_BE] = RTK_PCI_TXBD_IDX_BEQ, 23 [RTW_TX_QUEUE_VI] = RTK_PCI_TXBD_IDX_VIQ, 24 [RTW_TX_QUEUE_VO] = RTK_PCI_TXBD_IDX_VOQ, 25 [RTW_TX_QUEUE_MGMT] = RTK_PCI_TXBD_IDX_MGMTQ, 26 [RTW_TX_QUEUE_HI0] = RTK_PCI_TXBD_IDX_HI0Q, 27 [RTW_TX_QUEUE_H2C] = RTK_PCI_TXBD_IDX_H2CQ, 28 }; 29 30 static u8 rtw_pci_get_tx_qsel(struct sk_buff *skb, u8 queue) 31 { 32 switch (queue) { 33 case RTW_TX_QUEUE_BCN: 34 return TX_DESC_QSEL_BEACON; 35 case RTW_TX_QUEUE_H2C: 36 return TX_DESC_QSEL_H2C; 37 case RTW_TX_QUEUE_MGMT: 38 return TX_DESC_QSEL_MGMT; 39 case RTW_TX_QUEUE_HI0: 40 return TX_DESC_QSEL_HIGH; 41 default: 42 return skb->priority; 43 } 44 }; 45 46 static u8 rtw_pci_read8(struct rtw_dev *rtwdev, u32 addr) 47 { 48 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 49 50 return readb(rtwpci->mmap + addr); 51 } 52 53 static u16 rtw_pci_read16(struct rtw_dev *rtwdev, u32 addr) 54 { 55 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 56 57 return readw(rtwpci->mmap + addr); 58 } 59 60 static u32 rtw_pci_read32(struct rtw_dev *rtwdev, u32 addr) 61 { 62 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 63 64 return readl(rtwpci->mmap + addr); 65 } 66 67 static void rtw_pci_write8(struct rtw_dev *rtwdev, u32 addr, u8 val) 68 { 69 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 70 71 writeb(val, rtwpci->mmap + addr); 72 } 73 74 static void rtw_pci_write16(struct rtw_dev *rtwdev, u32 addr, u16 val) 75 { 76 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 77 78 writew(val, rtwpci->mmap + addr); 79 } 80 81 static void rtw_pci_write32(struct rtw_dev *rtwdev, u32 addr, u32 val) 82 { 83 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 84 85 writel(val, rtwpci->mmap + addr); 86 } 87 88 static inline void *rtw_pci_get_tx_desc(struct rtw_pci_tx_ring *tx_ring, u8 idx) 89 { 90 int offset = tx_ring->r.desc_size * idx; 91 92 return tx_ring->r.head + offset; 93 } 94 95 static void rtw_pci_free_tx_ring_skbs(struct rtw_dev *rtwdev, 96 struct rtw_pci_tx_ring *tx_ring) 97 { 98 struct pci_dev *pdev = to_pci_dev(rtwdev->dev); 99 struct rtw_pci_tx_data *tx_data; 100 struct sk_buff *skb, *tmp; 101 dma_addr_t dma; 102 103 /* free every skb remained in tx list */ 104 skb_queue_walk_safe(&tx_ring->queue, skb, tmp) { 105 __skb_unlink(skb, &tx_ring->queue); 106 tx_data = rtw_pci_get_tx_data(skb); 107 dma = tx_data->dma; 108 109 pci_unmap_single(pdev, dma, skb->len, PCI_DMA_TODEVICE); 110 dev_kfree_skb_any(skb); 111 } 112 } 113 114 static void rtw_pci_free_tx_ring(struct rtw_dev *rtwdev, 115 struct rtw_pci_tx_ring *tx_ring) 116 { 117 struct pci_dev *pdev = to_pci_dev(rtwdev->dev); 118 u8 *head = tx_ring->r.head; 119 u32 len = tx_ring->r.len; 120 int ring_sz = len * tx_ring->r.desc_size; 121 122 rtw_pci_free_tx_ring_skbs(rtwdev, tx_ring); 123 124 /* free the ring itself */ 125 pci_free_consistent(pdev, ring_sz, head, tx_ring->r.dma); 126 tx_ring->r.head = NULL; 127 } 128 129 static void rtw_pci_free_rx_ring_skbs(struct rtw_dev *rtwdev, 130 struct rtw_pci_rx_ring *rx_ring) 131 { 132 struct pci_dev *pdev = to_pci_dev(rtwdev->dev); 133 struct sk_buff *skb; 134 int buf_sz = RTK_PCI_RX_BUF_SIZE; 135 dma_addr_t dma; 136 int i; 137 138 for (i = 0; i < rx_ring->r.len; i++) { 139 skb = rx_ring->buf[i]; 140 if (!skb) 141 continue; 142 143 dma = *((dma_addr_t *)skb->cb); 144 pci_unmap_single(pdev, dma, buf_sz, PCI_DMA_FROMDEVICE); 145 dev_kfree_skb(skb); 146 rx_ring->buf[i] = NULL; 147 } 148 } 149 150 static void rtw_pci_free_rx_ring(struct rtw_dev *rtwdev, 151 struct rtw_pci_rx_ring *rx_ring) 152 { 153 struct pci_dev *pdev = to_pci_dev(rtwdev->dev); 154 u8 *head = rx_ring->r.head; 155 int ring_sz = rx_ring->r.desc_size * rx_ring->r.len; 156 157 rtw_pci_free_rx_ring_skbs(rtwdev, rx_ring); 158 159 pci_free_consistent(pdev, ring_sz, head, rx_ring->r.dma); 160 } 161 162 static void rtw_pci_free_trx_ring(struct rtw_dev *rtwdev) 163 { 164 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 165 struct rtw_pci_tx_ring *tx_ring; 166 struct rtw_pci_rx_ring *rx_ring; 167 int i; 168 169 for (i = 0; i < RTK_MAX_TX_QUEUE_NUM; i++) { 170 tx_ring = &rtwpci->tx_rings[i]; 171 rtw_pci_free_tx_ring(rtwdev, tx_ring); 172 } 173 174 for (i = 0; i < RTK_MAX_RX_QUEUE_NUM; i++) { 175 rx_ring = &rtwpci->rx_rings[i]; 176 rtw_pci_free_rx_ring(rtwdev, rx_ring); 177 } 178 } 179 180 static int rtw_pci_init_tx_ring(struct rtw_dev *rtwdev, 181 struct rtw_pci_tx_ring *tx_ring, 182 u8 desc_size, u32 len) 183 { 184 struct pci_dev *pdev = to_pci_dev(rtwdev->dev); 185 int ring_sz = desc_size * len; 186 dma_addr_t dma; 187 u8 *head; 188 189 if (len > TRX_BD_IDX_MASK) { 190 rtw_err(rtwdev, "len %d exceeds maximum TX entries\n", len); 191 return -EINVAL; 192 } 193 194 head = pci_zalloc_consistent(pdev, ring_sz, &dma); 195 if (!head) { 196 rtw_err(rtwdev, "failed to allocate tx ring\n"); 197 return -ENOMEM; 198 } 199 200 skb_queue_head_init(&tx_ring->queue); 201 tx_ring->r.head = head; 202 tx_ring->r.dma = dma; 203 tx_ring->r.len = len; 204 tx_ring->r.desc_size = desc_size; 205 tx_ring->r.wp = 0; 206 tx_ring->r.rp = 0; 207 208 return 0; 209 } 210 211 static int rtw_pci_reset_rx_desc(struct rtw_dev *rtwdev, struct sk_buff *skb, 212 struct rtw_pci_rx_ring *rx_ring, 213 u32 idx, u32 desc_sz) 214 { 215 struct pci_dev *pdev = to_pci_dev(rtwdev->dev); 216 struct rtw_pci_rx_buffer_desc *buf_desc; 217 int buf_sz = RTK_PCI_RX_BUF_SIZE; 218 dma_addr_t dma; 219 220 if (!skb) 221 return -EINVAL; 222 223 dma = pci_map_single(pdev, skb->data, buf_sz, PCI_DMA_FROMDEVICE); 224 if (pci_dma_mapping_error(pdev, dma)) 225 return -EBUSY; 226 227 *((dma_addr_t *)skb->cb) = dma; 228 buf_desc = (struct rtw_pci_rx_buffer_desc *)(rx_ring->r.head + 229 idx * desc_sz); 230 memset(buf_desc, 0, sizeof(*buf_desc)); 231 buf_desc->buf_size = cpu_to_le16(RTK_PCI_RX_BUF_SIZE); 232 buf_desc->dma = cpu_to_le32(dma); 233 234 return 0; 235 } 236 237 static void rtw_pci_sync_rx_desc_device(struct rtw_dev *rtwdev, dma_addr_t dma, 238 struct rtw_pci_rx_ring *rx_ring, 239 u32 idx, u32 desc_sz) 240 { 241 struct device *dev = rtwdev->dev; 242 struct rtw_pci_rx_buffer_desc *buf_desc; 243 int buf_sz = RTK_PCI_RX_BUF_SIZE; 244 245 dma_sync_single_for_device(dev, dma, buf_sz, DMA_FROM_DEVICE); 246 247 buf_desc = (struct rtw_pci_rx_buffer_desc *)(rx_ring->r.head + 248 idx * desc_sz); 249 memset(buf_desc, 0, sizeof(*buf_desc)); 250 buf_desc->buf_size = cpu_to_le16(RTK_PCI_RX_BUF_SIZE); 251 buf_desc->dma = cpu_to_le32(dma); 252 } 253 254 static int rtw_pci_init_rx_ring(struct rtw_dev *rtwdev, 255 struct rtw_pci_rx_ring *rx_ring, 256 u8 desc_size, u32 len) 257 { 258 struct pci_dev *pdev = to_pci_dev(rtwdev->dev); 259 struct sk_buff *skb = NULL; 260 dma_addr_t dma; 261 u8 *head; 262 int ring_sz = desc_size * len; 263 int buf_sz = RTK_PCI_RX_BUF_SIZE; 264 int i, allocated; 265 int ret = 0; 266 267 if (len > TRX_BD_IDX_MASK) { 268 rtw_err(rtwdev, "len %d exceeds maximum RX entries\n", len); 269 return -EINVAL; 270 } 271 272 head = pci_zalloc_consistent(pdev, ring_sz, &dma); 273 if (!head) { 274 rtw_err(rtwdev, "failed to allocate rx ring\n"); 275 return -ENOMEM; 276 } 277 rx_ring->r.head = head; 278 279 for (i = 0; i < len; i++) { 280 skb = dev_alloc_skb(buf_sz); 281 if (!skb) { 282 allocated = i; 283 ret = -ENOMEM; 284 goto err_out; 285 } 286 287 memset(skb->data, 0, buf_sz); 288 rx_ring->buf[i] = skb; 289 ret = rtw_pci_reset_rx_desc(rtwdev, skb, rx_ring, i, desc_size); 290 if (ret) { 291 allocated = i; 292 dev_kfree_skb_any(skb); 293 goto err_out; 294 } 295 } 296 297 rx_ring->r.dma = dma; 298 rx_ring->r.len = len; 299 rx_ring->r.desc_size = desc_size; 300 rx_ring->r.wp = 0; 301 rx_ring->r.rp = 0; 302 303 return 0; 304 305 err_out: 306 for (i = 0; i < allocated; i++) { 307 skb = rx_ring->buf[i]; 308 if (!skb) 309 continue; 310 dma = *((dma_addr_t *)skb->cb); 311 pci_unmap_single(pdev, dma, buf_sz, PCI_DMA_FROMDEVICE); 312 dev_kfree_skb_any(skb); 313 rx_ring->buf[i] = NULL; 314 } 315 pci_free_consistent(pdev, ring_sz, head, dma); 316 317 rtw_err(rtwdev, "failed to init rx buffer\n"); 318 319 return ret; 320 } 321 322 static int rtw_pci_init_trx_ring(struct rtw_dev *rtwdev) 323 { 324 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 325 struct rtw_pci_tx_ring *tx_ring; 326 struct rtw_pci_rx_ring *rx_ring; 327 struct rtw_chip_info *chip = rtwdev->chip; 328 int i = 0, j = 0, tx_alloced = 0, rx_alloced = 0; 329 int tx_desc_size, rx_desc_size; 330 u32 len; 331 int ret; 332 333 tx_desc_size = chip->tx_buf_desc_sz; 334 335 for (i = 0; i < RTK_MAX_TX_QUEUE_NUM; i++) { 336 tx_ring = &rtwpci->tx_rings[i]; 337 len = max_num_of_tx_queue(i); 338 ret = rtw_pci_init_tx_ring(rtwdev, tx_ring, tx_desc_size, len); 339 if (ret) 340 goto out; 341 } 342 343 rx_desc_size = chip->rx_buf_desc_sz; 344 345 for (j = 0; j < RTK_MAX_RX_QUEUE_NUM; j++) { 346 rx_ring = &rtwpci->rx_rings[j]; 347 ret = rtw_pci_init_rx_ring(rtwdev, rx_ring, rx_desc_size, 348 RTK_MAX_RX_DESC_NUM); 349 if (ret) 350 goto out; 351 } 352 353 return 0; 354 355 out: 356 tx_alloced = i; 357 for (i = 0; i < tx_alloced; i++) { 358 tx_ring = &rtwpci->tx_rings[i]; 359 rtw_pci_free_tx_ring(rtwdev, tx_ring); 360 } 361 362 rx_alloced = j; 363 for (j = 0; j < rx_alloced; j++) { 364 rx_ring = &rtwpci->rx_rings[j]; 365 rtw_pci_free_rx_ring(rtwdev, rx_ring); 366 } 367 368 return ret; 369 } 370 371 static void rtw_pci_deinit(struct rtw_dev *rtwdev) 372 { 373 rtw_pci_free_trx_ring(rtwdev); 374 } 375 376 static int rtw_pci_init(struct rtw_dev *rtwdev) 377 { 378 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 379 int ret = 0; 380 381 rtwpci->irq_mask[0] = IMR_HIGHDOK | 382 IMR_MGNTDOK | 383 IMR_BKDOK | 384 IMR_BEDOK | 385 IMR_VIDOK | 386 IMR_VODOK | 387 IMR_ROK | 388 IMR_BCNDMAINT_E | 389 0; 390 rtwpci->irq_mask[1] = IMR_TXFOVW | 391 0; 392 rtwpci->irq_mask[3] = IMR_H2CDOK | 393 0; 394 spin_lock_init(&rtwpci->irq_lock); 395 spin_lock_init(&rtwpci->hwirq_lock); 396 ret = rtw_pci_init_trx_ring(rtwdev); 397 398 return ret; 399 } 400 401 static void rtw_pci_reset_buf_desc(struct rtw_dev *rtwdev) 402 { 403 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 404 u32 len; 405 u8 tmp; 406 dma_addr_t dma; 407 408 tmp = rtw_read8(rtwdev, RTK_PCI_CTRL + 3); 409 rtw_write8(rtwdev, RTK_PCI_CTRL + 3, tmp | 0xf7); 410 411 dma = rtwpci->tx_rings[RTW_TX_QUEUE_BCN].r.dma; 412 rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_BCNQ, dma); 413 414 if (!rtw_chip_wcpu_11n(rtwdev)) { 415 len = rtwpci->tx_rings[RTW_TX_QUEUE_H2C].r.len; 416 dma = rtwpci->tx_rings[RTW_TX_QUEUE_H2C].r.dma; 417 rtwpci->tx_rings[RTW_TX_QUEUE_H2C].r.rp = 0; 418 rtwpci->tx_rings[RTW_TX_QUEUE_H2C].r.wp = 0; 419 rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_H2CQ, len & TRX_BD_IDX_MASK); 420 rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_H2CQ, dma); 421 } 422 423 len = rtwpci->tx_rings[RTW_TX_QUEUE_BK].r.len; 424 dma = rtwpci->tx_rings[RTW_TX_QUEUE_BK].r.dma; 425 rtwpci->tx_rings[RTW_TX_QUEUE_BK].r.rp = 0; 426 rtwpci->tx_rings[RTW_TX_QUEUE_BK].r.wp = 0; 427 rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_BKQ, len & TRX_BD_IDX_MASK); 428 rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_BKQ, dma); 429 430 len = rtwpci->tx_rings[RTW_TX_QUEUE_BE].r.len; 431 dma = rtwpci->tx_rings[RTW_TX_QUEUE_BE].r.dma; 432 rtwpci->tx_rings[RTW_TX_QUEUE_BE].r.rp = 0; 433 rtwpci->tx_rings[RTW_TX_QUEUE_BE].r.wp = 0; 434 rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_BEQ, len & TRX_BD_IDX_MASK); 435 rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_BEQ, dma); 436 437 len = rtwpci->tx_rings[RTW_TX_QUEUE_VO].r.len; 438 dma = rtwpci->tx_rings[RTW_TX_QUEUE_VO].r.dma; 439 rtwpci->tx_rings[RTW_TX_QUEUE_VO].r.rp = 0; 440 rtwpci->tx_rings[RTW_TX_QUEUE_VO].r.wp = 0; 441 rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_VOQ, len & TRX_BD_IDX_MASK); 442 rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_VOQ, dma); 443 444 len = rtwpci->tx_rings[RTW_TX_QUEUE_VI].r.len; 445 dma = rtwpci->tx_rings[RTW_TX_QUEUE_VI].r.dma; 446 rtwpci->tx_rings[RTW_TX_QUEUE_VI].r.rp = 0; 447 rtwpci->tx_rings[RTW_TX_QUEUE_VI].r.wp = 0; 448 rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_VIQ, len & TRX_BD_IDX_MASK); 449 rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_VIQ, dma); 450 451 len = rtwpci->tx_rings[RTW_TX_QUEUE_MGMT].r.len; 452 dma = rtwpci->tx_rings[RTW_TX_QUEUE_MGMT].r.dma; 453 rtwpci->tx_rings[RTW_TX_QUEUE_MGMT].r.rp = 0; 454 rtwpci->tx_rings[RTW_TX_QUEUE_MGMT].r.wp = 0; 455 rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_MGMTQ, len & TRX_BD_IDX_MASK); 456 rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_MGMTQ, dma); 457 458 len = rtwpci->tx_rings[RTW_TX_QUEUE_HI0].r.len; 459 dma = rtwpci->tx_rings[RTW_TX_QUEUE_HI0].r.dma; 460 rtwpci->tx_rings[RTW_TX_QUEUE_HI0].r.rp = 0; 461 rtwpci->tx_rings[RTW_TX_QUEUE_HI0].r.wp = 0; 462 rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_HI0Q, len & TRX_BD_IDX_MASK); 463 rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_HI0Q, dma); 464 465 len = rtwpci->rx_rings[RTW_RX_QUEUE_MPDU].r.len; 466 dma = rtwpci->rx_rings[RTW_RX_QUEUE_MPDU].r.dma; 467 rtwpci->rx_rings[RTW_RX_QUEUE_MPDU].r.rp = 0; 468 rtwpci->rx_rings[RTW_RX_QUEUE_MPDU].r.wp = 0; 469 rtw_write16(rtwdev, RTK_PCI_RXBD_NUM_MPDUQ, len & TRX_BD_IDX_MASK); 470 rtw_write32(rtwdev, RTK_PCI_RXBD_DESA_MPDUQ, dma); 471 472 /* reset read/write point */ 473 rtw_write32(rtwdev, RTK_PCI_TXBD_RWPTR_CLR, 0xffffffff); 474 475 /* reset H2C Queue index in a single write */ 476 if (rtw_chip_wcpu_11ac(rtwdev)) 477 rtw_write32_set(rtwdev, RTK_PCI_TXBD_H2CQ_CSR, 478 BIT_CLR_H2CQ_HOST_IDX | BIT_CLR_H2CQ_HW_IDX); 479 } 480 481 static void rtw_pci_reset_trx_ring(struct rtw_dev *rtwdev) 482 { 483 rtw_pci_reset_buf_desc(rtwdev); 484 } 485 486 static void rtw_pci_enable_interrupt(struct rtw_dev *rtwdev, 487 struct rtw_pci *rtwpci) 488 { 489 unsigned long flags; 490 491 spin_lock_irqsave(&rtwpci->hwirq_lock, flags); 492 493 rtw_write32(rtwdev, RTK_PCI_HIMR0, rtwpci->irq_mask[0]); 494 rtw_write32(rtwdev, RTK_PCI_HIMR1, rtwpci->irq_mask[1]); 495 if (rtw_chip_wcpu_11ac(rtwdev)) 496 rtw_write32(rtwdev, RTK_PCI_HIMR3, rtwpci->irq_mask[3]); 497 498 rtwpci->irq_enabled = true; 499 500 spin_unlock_irqrestore(&rtwpci->hwirq_lock, flags); 501 } 502 503 static void rtw_pci_disable_interrupt(struct rtw_dev *rtwdev, 504 struct rtw_pci *rtwpci) 505 { 506 unsigned long flags; 507 508 spin_lock_irqsave(&rtwpci->hwirq_lock, flags); 509 510 if (!rtwpci->irq_enabled) 511 goto out; 512 513 rtw_write32(rtwdev, RTK_PCI_HIMR0, 0); 514 rtw_write32(rtwdev, RTK_PCI_HIMR1, 0); 515 if (rtw_chip_wcpu_11ac(rtwdev)) 516 rtw_write32(rtwdev, RTK_PCI_HIMR3, 0); 517 518 rtwpci->irq_enabled = false; 519 520 out: 521 spin_unlock_irqrestore(&rtwpci->hwirq_lock, flags); 522 } 523 524 static void rtw_pci_dma_reset(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci) 525 { 526 /* reset dma and rx tag */ 527 rtw_write32_set(rtwdev, RTK_PCI_CTRL, 528 BIT_RST_TRXDMA_INTF | BIT_RX_TAG_EN); 529 rtwpci->rx_tag = 0; 530 } 531 532 static int rtw_pci_setup(struct rtw_dev *rtwdev) 533 { 534 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 535 536 rtw_pci_reset_trx_ring(rtwdev); 537 rtw_pci_dma_reset(rtwdev, rtwpci); 538 539 return 0; 540 } 541 542 static void rtw_pci_dma_release(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci) 543 { 544 struct rtw_pci_tx_ring *tx_ring; 545 u8 queue; 546 547 rtw_pci_reset_trx_ring(rtwdev); 548 for (queue = 0; queue < RTK_MAX_TX_QUEUE_NUM; queue++) { 549 tx_ring = &rtwpci->tx_rings[queue]; 550 rtw_pci_free_tx_ring_skbs(rtwdev, tx_ring); 551 } 552 } 553 554 static int rtw_pci_start(struct rtw_dev *rtwdev) 555 { 556 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 557 558 spin_lock_bh(&rtwpci->irq_lock); 559 rtw_pci_enable_interrupt(rtwdev, rtwpci); 560 spin_unlock_bh(&rtwpci->irq_lock); 561 562 return 0; 563 } 564 565 static void rtw_pci_stop(struct rtw_dev *rtwdev) 566 { 567 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 568 569 spin_lock_bh(&rtwpci->irq_lock); 570 rtw_pci_disable_interrupt(rtwdev, rtwpci); 571 rtw_pci_dma_release(rtwdev, rtwpci); 572 spin_unlock_bh(&rtwpci->irq_lock); 573 } 574 575 static void rtw_pci_deep_ps_enter(struct rtw_dev *rtwdev) 576 { 577 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 578 struct rtw_pci_tx_ring *tx_ring; 579 bool tx_empty = true; 580 u8 queue; 581 582 lockdep_assert_held(&rtwpci->irq_lock); 583 584 /* Deep PS state is not allowed to TX-DMA */ 585 for (queue = 0; queue < RTK_MAX_TX_QUEUE_NUM; queue++) { 586 /* BCN queue is rsvd page, does not have DMA interrupt 587 * H2C queue is managed by firmware 588 */ 589 if (queue == RTW_TX_QUEUE_BCN || 590 queue == RTW_TX_QUEUE_H2C) 591 continue; 592 593 tx_ring = &rtwpci->tx_rings[queue]; 594 595 /* check if there is any skb DMAing */ 596 if (skb_queue_len(&tx_ring->queue)) { 597 tx_empty = false; 598 break; 599 } 600 } 601 602 if (!tx_empty) { 603 rtw_dbg(rtwdev, RTW_DBG_PS, 604 "TX path not empty, cannot enter deep power save state\n"); 605 return; 606 } 607 608 set_bit(RTW_FLAG_LEISURE_PS_DEEP, rtwdev->flags); 609 rtw_power_mode_change(rtwdev, true); 610 } 611 612 static void rtw_pci_deep_ps_leave(struct rtw_dev *rtwdev) 613 { 614 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 615 616 lockdep_assert_held(&rtwpci->irq_lock); 617 618 if (test_and_clear_bit(RTW_FLAG_LEISURE_PS_DEEP, rtwdev->flags)) 619 rtw_power_mode_change(rtwdev, false); 620 } 621 622 static void rtw_pci_deep_ps(struct rtw_dev *rtwdev, bool enter) 623 { 624 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 625 626 spin_lock_bh(&rtwpci->irq_lock); 627 628 if (enter && !test_bit(RTW_FLAG_LEISURE_PS_DEEP, rtwdev->flags)) 629 rtw_pci_deep_ps_enter(rtwdev); 630 631 if (!enter && test_bit(RTW_FLAG_LEISURE_PS_DEEP, rtwdev->flags)) 632 rtw_pci_deep_ps_leave(rtwdev); 633 634 spin_unlock_bh(&rtwpci->irq_lock); 635 } 636 637 static u8 ac_to_hwq[] = { 638 [IEEE80211_AC_VO] = RTW_TX_QUEUE_VO, 639 [IEEE80211_AC_VI] = RTW_TX_QUEUE_VI, 640 [IEEE80211_AC_BE] = RTW_TX_QUEUE_BE, 641 [IEEE80211_AC_BK] = RTW_TX_QUEUE_BK, 642 }; 643 644 static u8 rtw_hw_queue_mapping(struct sk_buff *skb) 645 { 646 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 647 __le16 fc = hdr->frame_control; 648 u8 q_mapping = skb_get_queue_mapping(skb); 649 u8 queue; 650 651 if (unlikely(ieee80211_is_beacon(fc))) 652 queue = RTW_TX_QUEUE_BCN; 653 else if (unlikely(ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc))) 654 queue = RTW_TX_QUEUE_MGMT; 655 else if (WARN_ON_ONCE(q_mapping >= ARRAY_SIZE(ac_to_hwq))) 656 queue = ac_to_hwq[IEEE80211_AC_BE]; 657 else 658 queue = ac_to_hwq[q_mapping]; 659 660 return queue; 661 } 662 663 static void rtw_pci_release_rsvd_page(struct rtw_pci *rtwpci, 664 struct rtw_pci_tx_ring *ring) 665 { 666 struct sk_buff *prev = skb_dequeue(&ring->queue); 667 struct rtw_pci_tx_data *tx_data; 668 dma_addr_t dma; 669 670 if (!prev) 671 return; 672 673 tx_data = rtw_pci_get_tx_data(prev); 674 dma = tx_data->dma; 675 pci_unmap_single(rtwpci->pdev, dma, prev->len, 676 PCI_DMA_TODEVICE); 677 dev_kfree_skb_any(prev); 678 } 679 680 static void rtw_pci_dma_check(struct rtw_dev *rtwdev, 681 struct rtw_pci_rx_ring *rx_ring, 682 u32 idx) 683 { 684 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 685 struct rtw_chip_info *chip = rtwdev->chip; 686 struct rtw_pci_rx_buffer_desc *buf_desc; 687 u32 desc_sz = chip->rx_buf_desc_sz; 688 u16 total_pkt_size; 689 690 buf_desc = (struct rtw_pci_rx_buffer_desc *)(rx_ring->r.head + 691 idx * desc_sz); 692 total_pkt_size = le16_to_cpu(buf_desc->total_pkt_size); 693 694 /* rx tag mismatch, throw a warning */ 695 if (total_pkt_size != rtwpci->rx_tag) 696 rtw_warn(rtwdev, "pci bus timeout, check dma status\n"); 697 698 rtwpci->rx_tag = (rtwpci->rx_tag + 1) % RX_TAG_MAX; 699 } 700 701 static void rtw_pci_tx_kick_off_queue(struct rtw_dev *rtwdev, u8 queue) 702 { 703 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 704 struct rtw_pci_tx_ring *ring; 705 u32 bd_idx; 706 707 ring = &rtwpci->tx_rings[queue]; 708 bd_idx = rtw_pci_tx_queue_idx_addr[queue]; 709 710 spin_lock_bh(&rtwpci->irq_lock); 711 rtw_pci_deep_ps_leave(rtwdev); 712 rtw_write16(rtwdev, bd_idx, ring->r.wp & TRX_BD_IDX_MASK); 713 spin_unlock_bh(&rtwpci->irq_lock); 714 } 715 716 static void rtw_pci_tx_kick_off(struct rtw_dev *rtwdev) 717 { 718 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 719 u8 queue; 720 721 for (queue = 0; queue < RTK_MAX_TX_QUEUE_NUM; queue++) 722 if (test_and_clear_bit(queue, rtwpci->tx_queued)) 723 rtw_pci_tx_kick_off_queue(rtwdev, queue); 724 } 725 726 static int rtw_pci_tx_write_data(struct rtw_dev *rtwdev, 727 struct rtw_tx_pkt_info *pkt_info, 728 struct sk_buff *skb, u8 queue) 729 { 730 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 731 struct rtw_chip_info *chip = rtwdev->chip; 732 struct rtw_pci_tx_ring *ring; 733 struct rtw_pci_tx_data *tx_data; 734 dma_addr_t dma; 735 u32 tx_pkt_desc_sz = chip->tx_pkt_desc_sz; 736 u32 tx_buf_desc_sz = chip->tx_buf_desc_sz; 737 u32 size; 738 u32 psb_len; 739 u8 *pkt_desc; 740 struct rtw_pci_tx_buffer_desc *buf_desc; 741 742 ring = &rtwpci->tx_rings[queue]; 743 744 size = skb->len; 745 746 if (queue == RTW_TX_QUEUE_BCN) 747 rtw_pci_release_rsvd_page(rtwpci, ring); 748 else if (!avail_desc(ring->r.wp, ring->r.rp, ring->r.len)) 749 return -ENOSPC; 750 751 pkt_desc = skb_push(skb, chip->tx_pkt_desc_sz); 752 memset(pkt_desc, 0, tx_pkt_desc_sz); 753 pkt_info->qsel = rtw_pci_get_tx_qsel(skb, queue); 754 rtw_tx_fill_tx_desc(pkt_info, skb); 755 dma = pci_map_single(rtwpci->pdev, skb->data, skb->len, 756 PCI_DMA_TODEVICE); 757 if (pci_dma_mapping_error(rtwpci->pdev, dma)) 758 return -EBUSY; 759 760 /* after this we got dma mapped, there is no way back */ 761 buf_desc = get_tx_buffer_desc(ring, tx_buf_desc_sz); 762 memset(buf_desc, 0, tx_buf_desc_sz); 763 psb_len = (skb->len - 1) / 128 + 1; 764 if (queue == RTW_TX_QUEUE_BCN) 765 psb_len |= 1 << RTK_PCI_TXBD_OWN_OFFSET; 766 767 buf_desc[0].psb_len = cpu_to_le16(psb_len); 768 buf_desc[0].buf_size = cpu_to_le16(tx_pkt_desc_sz); 769 buf_desc[0].dma = cpu_to_le32(dma); 770 buf_desc[1].buf_size = cpu_to_le16(size); 771 buf_desc[1].dma = cpu_to_le32(dma + tx_pkt_desc_sz); 772 773 tx_data = rtw_pci_get_tx_data(skb); 774 tx_data->dma = dma; 775 tx_data->sn = pkt_info->sn; 776 777 spin_lock_bh(&rtwpci->irq_lock); 778 779 skb_queue_tail(&ring->queue, skb); 780 781 if (queue == RTW_TX_QUEUE_BCN) 782 goto out_unlock; 783 784 /* update write-index, and kick it off later */ 785 set_bit(queue, rtwpci->tx_queued); 786 if (++ring->r.wp >= ring->r.len) 787 ring->r.wp = 0; 788 789 out_unlock: 790 spin_unlock_bh(&rtwpci->irq_lock); 791 792 return 0; 793 } 794 795 static int rtw_pci_write_data_rsvd_page(struct rtw_dev *rtwdev, u8 *buf, 796 u32 size) 797 { 798 struct sk_buff *skb; 799 struct rtw_tx_pkt_info pkt_info = {0}; 800 u8 reg_bcn_work; 801 int ret; 802 803 skb = rtw_tx_write_data_rsvd_page_get(rtwdev, &pkt_info, buf, size); 804 if (!skb) 805 return -ENOMEM; 806 807 ret = rtw_pci_tx_write_data(rtwdev, &pkt_info, skb, RTW_TX_QUEUE_BCN); 808 if (ret) { 809 rtw_err(rtwdev, "failed to write rsvd page data\n"); 810 return ret; 811 } 812 813 /* reserved pages go through beacon queue */ 814 reg_bcn_work = rtw_read8(rtwdev, RTK_PCI_TXBD_BCN_WORK); 815 reg_bcn_work |= BIT_PCI_BCNQ_FLAG; 816 rtw_write8(rtwdev, RTK_PCI_TXBD_BCN_WORK, reg_bcn_work); 817 818 return 0; 819 } 820 821 static int rtw_pci_write_data_h2c(struct rtw_dev *rtwdev, u8 *buf, u32 size) 822 { 823 struct sk_buff *skb; 824 struct rtw_tx_pkt_info pkt_info = {0}; 825 int ret; 826 827 skb = rtw_tx_write_data_h2c_get(rtwdev, &pkt_info, buf, size); 828 if (!skb) 829 return -ENOMEM; 830 831 ret = rtw_pci_tx_write_data(rtwdev, &pkt_info, skb, RTW_TX_QUEUE_H2C); 832 if (ret) { 833 rtw_err(rtwdev, "failed to write h2c data\n"); 834 return ret; 835 } 836 837 rtw_pci_tx_kick_off_queue(rtwdev, RTW_TX_QUEUE_H2C); 838 839 return 0; 840 } 841 842 static int rtw_pci_tx_write(struct rtw_dev *rtwdev, 843 struct rtw_tx_pkt_info *pkt_info, 844 struct sk_buff *skb) 845 { 846 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 847 struct rtw_pci_tx_ring *ring; 848 u8 queue = rtw_hw_queue_mapping(skb); 849 int ret; 850 851 ret = rtw_pci_tx_write_data(rtwdev, pkt_info, skb, queue); 852 if (ret) 853 return ret; 854 855 ring = &rtwpci->tx_rings[queue]; 856 if (avail_desc(ring->r.wp, ring->r.rp, ring->r.len) < 2) { 857 ieee80211_stop_queue(rtwdev->hw, skb_get_queue_mapping(skb)); 858 ring->queue_stopped = true; 859 } 860 861 return 0; 862 } 863 864 static void rtw_pci_tx_isr(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci, 865 u8 hw_queue) 866 { 867 struct ieee80211_hw *hw = rtwdev->hw; 868 struct ieee80211_tx_info *info; 869 struct rtw_pci_tx_ring *ring; 870 struct rtw_pci_tx_data *tx_data; 871 struct sk_buff *skb; 872 u32 count; 873 u32 bd_idx_addr; 874 u32 bd_idx, cur_rp; 875 u16 q_map; 876 877 ring = &rtwpci->tx_rings[hw_queue]; 878 879 bd_idx_addr = rtw_pci_tx_queue_idx_addr[hw_queue]; 880 bd_idx = rtw_read32(rtwdev, bd_idx_addr); 881 cur_rp = bd_idx >> 16; 882 cur_rp &= TRX_BD_IDX_MASK; 883 if (cur_rp >= ring->r.rp) 884 count = cur_rp - ring->r.rp; 885 else 886 count = ring->r.len - (ring->r.rp - cur_rp); 887 888 while (count--) { 889 skb = skb_dequeue(&ring->queue); 890 if (!skb) { 891 rtw_err(rtwdev, "failed to dequeue %d skb TX queue %d, BD=0x%08x, rp %d -> %d\n", 892 count, hw_queue, bd_idx, ring->r.rp, cur_rp); 893 break; 894 } 895 tx_data = rtw_pci_get_tx_data(skb); 896 pci_unmap_single(rtwpci->pdev, tx_data->dma, skb->len, 897 PCI_DMA_TODEVICE); 898 899 /* just free command packets from host to card */ 900 if (hw_queue == RTW_TX_QUEUE_H2C) { 901 dev_kfree_skb_irq(skb); 902 continue; 903 } 904 905 if (ring->queue_stopped && 906 avail_desc(ring->r.wp, ring->r.rp, ring->r.len) > 4) { 907 q_map = skb_get_queue_mapping(skb); 908 ieee80211_wake_queue(hw, q_map); 909 ring->queue_stopped = false; 910 } 911 912 skb_pull(skb, rtwdev->chip->tx_pkt_desc_sz); 913 914 info = IEEE80211_SKB_CB(skb); 915 916 /* enqueue to wait for tx report */ 917 if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) { 918 rtw_tx_report_enqueue(rtwdev, skb, tx_data->sn); 919 continue; 920 } 921 922 /* always ACK for others, then they won't be marked as drop */ 923 if (info->flags & IEEE80211_TX_CTL_NO_ACK) 924 info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED; 925 else 926 info->flags |= IEEE80211_TX_STAT_ACK; 927 928 ieee80211_tx_info_clear_status(info); 929 ieee80211_tx_status_irqsafe(hw, skb); 930 } 931 932 ring->r.rp = cur_rp; 933 } 934 935 static void rtw_pci_rx_isr(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci, 936 u8 hw_queue) 937 { 938 struct rtw_chip_info *chip = rtwdev->chip; 939 struct rtw_pci_rx_ring *ring; 940 struct rtw_rx_pkt_stat pkt_stat; 941 struct ieee80211_rx_status rx_status; 942 struct sk_buff *skb, *new; 943 u32 cur_wp, cur_rp, tmp; 944 u32 count; 945 u32 pkt_offset; 946 u32 pkt_desc_sz = chip->rx_pkt_desc_sz; 947 u32 buf_desc_sz = chip->rx_buf_desc_sz; 948 u32 new_len; 949 u8 *rx_desc; 950 dma_addr_t dma; 951 952 ring = &rtwpci->rx_rings[RTW_RX_QUEUE_MPDU]; 953 954 tmp = rtw_read32(rtwdev, RTK_PCI_RXBD_IDX_MPDUQ); 955 cur_wp = tmp >> 16; 956 cur_wp &= TRX_BD_IDX_MASK; 957 if (cur_wp >= ring->r.wp) 958 count = cur_wp - ring->r.wp; 959 else 960 count = ring->r.len - (ring->r.wp - cur_wp); 961 962 cur_rp = ring->r.rp; 963 while (count--) { 964 rtw_pci_dma_check(rtwdev, ring, cur_rp); 965 skb = ring->buf[cur_rp]; 966 dma = *((dma_addr_t *)skb->cb); 967 dma_sync_single_for_cpu(rtwdev->dev, dma, RTK_PCI_RX_BUF_SIZE, 968 DMA_FROM_DEVICE); 969 rx_desc = skb->data; 970 chip->ops->query_rx_desc(rtwdev, rx_desc, &pkt_stat, &rx_status); 971 972 /* offset from rx_desc to payload */ 973 pkt_offset = pkt_desc_sz + pkt_stat.drv_info_sz + 974 pkt_stat.shift; 975 976 /* allocate a new skb for this frame, 977 * discard the frame if none available 978 */ 979 new_len = pkt_stat.pkt_len + pkt_offset; 980 new = dev_alloc_skb(new_len); 981 if (WARN_ONCE(!new, "rx routine starvation\n")) 982 goto next_rp; 983 984 /* put the DMA data including rx_desc from phy to new skb */ 985 skb_put_data(new, skb->data, new_len); 986 987 if (pkt_stat.is_c2h) { 988 rtw_fw_c2h_cmd_rx_irqsafe(rtwdev, pkt_offset, new); 989 } else { 990 /* remove rx_desc */ 991 skb_pull(new, pkt_offset); 992 993 rtw_rx_stats(rtwdev, pkt_stat.vif, new); 994 memcpy(new->cb, &rx_status, sizeof(rx_status)); 995 ieee80211_rx_irqsafe(rtwdev->hw, new); 996 } 997 998 next_rp: 999 /* new skb delivered to mac80211, re-enable original skb DMA */ 1000 rtw_pci_sync_rx_desc_device(rtwdev, dma, ring, cur_rp, 1001 buf_desc_sz); 1002 1003 /* host read next element in ring */ 1004 if (++cur_rp >= ring->r.len) 1005 cur_rp = 0; 1006 } 1007 1008 ring->r.rp = cur_rp; 1009 ring->r.wp = cur_wp; 1010 rtw_write16(rtwdev, RTK_PCI_RXBD_IDX_MPDUQ, ring->r.rp); 1011 } 1012 1013 static void rtw_pci_irq_recognized(struct rtw_dev *rtwdev, 1014 struct rtw_pci *rtwpci, u32 *irq_status) 1015 { 1016 unsigned long flags; 1017 1018 spin_lock_irqsave(&rtwpci->hwirq_lock, flags); 1019 1020 irq_status[0] = rtw_read32(rtwdev, RTK_PCI_HISR0); 1021 irq_status[1] = rtw_read32(rtwdev, RTK_PCI_HISR1); 1022 if (rtw_chip_wcpu_11ac(rtwdev)) 1023 irq_status[3] = rtw_read32(rtwdev, RTK_PCI_HISR3); 1024 else 1025 irq_status[3] = 0; 1026 irq_status[0] &= rtwpci->irq_mask[0]; 1027 irq_status[1] &= rtwpci->irq_mask[1]; 1028 irq_status[3] &= rtwpci->irq_mask[3]; 1029 rtw_write32(rtwdev, RTK_PCI_HISR0, irq_status[0]); 1030 rtw_write32(rtwdev, RTK_PCI_HISR1, irq_status[1]); 1031 if (rtw_chip_wcpu_11ac(rtwdev)) 1032 rtw_write32(rtwdev, RTK_PCI_HISR3, irq_status[3]); 1033 1034 spin_unlock_irqrestore(&rtwpci->hwirq_lock, flags); 1035 } 1036 1037 static irqreturn_t rtw_pci_interrupt_handler(int irq, void *dev) 1038 { 1039 struct rtw_dev *rtwdev = dev; 1040 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 1041 1042 /* disable RTW PCI interrupt to avoid more interrupts before the end of 1043 * thread function 1044 * 1045 * disable HIMR here to also avoid new HISR flag being raised before 1046 * the HISRs have been Write-1-cleared for MSI. If not all of the HISRs 1047 * are cleared, the edge-triggered interrupt will not be generated when 1048 * a new HISR flag is set. 1049 */ 1050 rtw_pci_disable_interrupt(rtwdev, rtwpci); 1051 1052 return IRQ_WAKE_THREAD; 1053 } 1054 1055 static irqreturn_t rtw_pci_interrupt_threadfn(int irq, void *dev) 1056 { 1057 struct rtw_dev *rtwdev = dev; 1058 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 1059 u32 irq_status[4]; 1060 1061 spin_lock_bh(&rtwpci->irq_lock); 1062 rtw_pci_irq_recognized(rtwdev, rtwpci, irq_status); 1063 1064 if (irq_status[0] & IMR_MGNTDOK) 1065 rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_MGMT); 1066 if (irq_status[0] & IMR_HIGHDOK) 1067 rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_HI0); 1068 if (irq_status[0] & IMR_BEDOK) 1069 rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_BE); 1070 if (irq_status[0] & IMR_BKDOK) 1071 rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_BK); 1072 if (irq_status[0] & IMR_VODOK) 1073 rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_VO); 1074 if (irq_status[0] & IMR_VIDOK) 1075 rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_VI); 1076 if (irq_status[3] & IMR_H2CDOK) 1077 rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_H2C); 1078 if (irq_status[0] & IMR_ROK) 1079 rtw_pci_rx_isr(rtwdev, rtwpci, RTW_RX_QUEUE_MPDU); 1080 1081 /* all of the jobs for this interrupt have been done */ 1082 rtw_pci_enable_interrupt(rtwdev, rtwpci); 1083 spin_unlock_bh(&rtwpci->irq_lock); 1084 1085 return IRQ_HANDLED; 1086 } 1087 1088 static int rtw_pci_io_mapping(struct rtw_dev *rtwdev, 1089 struct pci_dev *pdev) 1090 { 1091 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 1092 unsigned long len; 1093 u8 bar_id = 2; 1094 int ret; 1095 1096 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1097 if (ret) { 1098 rtw_err(rtwdev, "failed to request pci regions\n"); 1099 return ret; 1100 } 1101 1102 len = pci_resource_len(pdev, bar_id); 1103 rtwpci->mmap = pci_iomap(pdev, bar_id, len); 1104 if (!rtwpci->mmap) { 1105 pci_release_regions(pdev); 1106 rtw_err(rtwdev, "failed to map pci memory\n"); 1107 return -ENOMEM; 1108 } 1109 1110 return 0; 1111 } 1112 1113 static void rtw_pci_io_unmapping(struct rtw_dev *rtwdev, 1114 struct pci_dev *pdev) 1115 { 1116 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 1117 1118 if (rtwpci->mmap) { 1119 pci_iounmap(pdev, rtwpci->mmap); 1120 pci_release_regions(pdev); 1121 } 1122 } 1123 1124 static void rtw_dbi_write8(struct rtw_dev *rtwdev, u16 addr, u8 data) 1125 { 1126 u16 write_addr; 1127 u16 remainder = addr & ~(BITS_DBI_WREN | BITS_DBI_ADDR_MASK); 1128 u8 flag; 1129 u8 cnt; 1130 1131 write_addr = addr & BITS_DBI_ADDR_MASK; 1132 write_addr |= u16_encode_bits(BIT(remainder), BITS_DBI_WREN); 1133 rtw_write8(rtwdev, REG_DBI_WDATA_V1 + remainder, data); 1134 rtw_write16(rtwdev, REG_DBI_FLAG_V1, write_addr); 1135 rtw_write8(rtwdev, REG_DBI_FLAG_V1 + 2, BIT_DBI_WFLAG >> 16); 1136 1137 for (cnt = 0; cnt < RTW_PCI_WR_RETRY_CNT; cnt++) { 1138 flag = rtw_read8(rtwdev, REG_DBI_FLAG_V1 + 2); 1139 if (flag == 0) 1140 return; 1141 1142 udelay(10); 1143 } 1144 1145 WARN(flag, "failed to write to DBI register, addr=0x%04x\n", addr); 1146 } 1147 1148 static int rtw_dbi_read8(struct rtw_dev *rtwdev, u16 addr, u8 *value) 1149 { 1150 u16 read_addr = addr & BITS_DBI_ADDR_MASK; 1151 u8 flag; 1152 u8 cnt; 1153 1154 rtw_write16(rtwdev, REG_DBI_FLAG_V1, read_addr); 1155 rtw_write8(rtwdev, REG_DBI_FLAG_V1 + 2, BIT_DBI_RFLAG >> 16); 1156 1157 for (cnt = 0; cnt < RTW_PCI_WR_RETRY_CNT; cnt++) { 1158 flag = rtw_read8(rtwdev, REG_DBI_FLAG_V1 + 2); 1159 if (flag == 0) { 1160 read_addr = REG_DBI_RDATA_V1 + (addr & 3); 1161 *value = rtw_read8(rtwdev, read_addr); 1162 return 0; 1163 } 1164 1165 udelay(10); 1166 } 1167 1168 WARN(1, "failed to read DBI register, addr=0x%04x\n", addr); 1169 return -EIO; 1170 } 1171 1172 static void rtw_mdio_write(struct rtw_dev *rtwdev, u8 addr, u16 data, bool g1) 1173 { 1174 u8 page; 1175 u8 wflag; 1176 u8 cnt; 1177 1178 rtw_write16(rtwdev, REG_MDIO_V1, data); 1179 1180 page = addr < RTW_PCI_MDIO_PG_SZ ? 0 : 1; 1181 page += g1 ? RTW_PCI_MDIO_PG_OFFS_G1 : RTW_PCI_MDIO_PG_OFFS_G2; 1182 rtw_write8(rtwdev, REG_PCIE_MIX_CFG, addr & BITS_MDIO_ADDR_MASK); 1183 rtw_write8(rtwdev, REG_PCIE_MIX_CFG + 3, page); 1184 rtw_write32_mask(rtwdev, REG_PCIE_MIX_CFG, BIT_MDIO_WFLAG_V1, 1); 1185 1186 for (cnt = 0; cnt < RTW_PCI_WR_RETRY_CNT; cnt++) { 1187 wflag = rtw_read32_mask(rtwdev, REG_PCIE_MIX_CFG, 1188 BIT_MDIO_WFLAG_V1); 1189 if (wflag == 0) 1190 return; 1191 1192 udelay(10); 1193 } 1194 1195 WARN(wflag, "failed to write to MDIO register, addr=0x%02x\n", addr); 1196 } 1197 1198 static void rtw_pci_clkreq_set(struct rtw_dev *rtwdev, bool enable) 1199 { 1200 u8 value; 1201 int ret; 1202 1203 ret = rtw_dbi_read8(rtwdev, RTK_PCIE_LINK_CFG, &value); 1204 if (ret) { 1205 rtw_err(rtwdev, "failed to read CLKREQ_L1, ret=%d", ret); 1206 return; 1207 } 1208 1209 if (enable) 1210 value |= BIT_CLKREQ_SW_EN; 1211 else 1212 value &= ~BIT_CLKREQ_SW_EN; 1213 1214 rtw_dbi_write8(rtwdev, RTK_PCIE_LINK_CFG, value); 1215 } 1216 1217 static void rtw_pci_aspm_set(struct rtw_dev *rtwdev, bool enable) 1218 { 1219 u8 value; 1220 int ret; 1221 1222 ret = rtw_dbi_read8(rtwdev, RTK_PCIE_LINK_CFG, &value); 1223 if (ret) { 1224 rtw_err(rtwdev, "failed to read ASPM, ret=%d", ret); 1225 return; 1226 } 1227 1228 if (enable) 1229 value |= BIT_L1_SW_EN; 1230 else 1231 value &= ~BIT_L1_SW_EN; 1232 1233 rtw_dbi_write8(rtwdev, RTK_PCIE_LINK_CFG, value); 1234 } 1235 1236 static void rtw_pci_link_ps(struct rtw_dev *rtwdev, bool enter) 1237 { 1238 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 1239 1240 /* Like CLKREQ, ASPM is also implemented by two HW modules, and can 1241 * only be enabled when host supports it. 1242 * 1243 * And ASPM mechanism should be enabled when driver/firmware enters 1244 * power save mode, without having heavy traffic. Because we've 1245 * experienced some inter-operability issues that the link tends 1246 * to enter L1 state on the fly even when driver is having high 1247 * throughput. This is probably because the ASPM behavior slightly 1248 * varies from different SOC. 1249 */ 1250 if (rtwpci->link_ctrl & PCI_EXP_LNKCTL_ASPM_L1) 1251 rtw_pci_aspm_set(rtwdev, enter); 1252 } 1253 1254 static void rtw_pci_link_cfg(struct rtw_dev *rtwdev) 1255 { 1256 struct rtw_chip_info *chip = rtwdev->chip; 1257 struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 1258 struct pci_dev *pdev = rtwpci->pdev; 1259 u16 link_ctrl; 1260 int ret; 1261 1262 /* RTL8822CE has enabled REFCLK auto calibration, it does not need 1263 * to add clock delay to cover the REFCLK timing gap. 1264 */ 1265 if (chip->id == RTW_CHIP_TYPE_8822C) 1266 rtw_dbi_write8(rtwdev, RTK_PCIE_CLKDLY_CTRL, 0); 1267 1268 /* Though there is standard PCIE configuration space to set the 1269 * link control register, but by Realtek's design, driver should 1270 * check if host supports CLKREQ/ASPM to enable the HW module. 1271 * 1272 * These functions are implemented by two HW modules associated, 1273 * one is responsible to access PCIE configuration space to 1274 * follow the host settings, and another is in charge of doing 1275 * CLKREQ/ASPM mechanisms, it is default disabled. Because sometimes 1276 * the host does not support it, and due to some reasons or wrong 1277 * settings (ex. CLKREQ# not Bi-Direction), it could lead to device 1278 * loss if HW misbehaves on the link. 1279 * 1280 * Hence it's designed that driver should first check the PCIE 1281 * configuration space is sync'ed and enabled, then driver can turn 1282 * on the other module that is actually working on the mechanism. 1283 */ 1284 ret = pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &link_ctrl); 1285 if (ret) { 1286 rtw_err(rtwdev, "failed to read PCI cap, ret=%d\n", ret); 1287 return; 1288 } 1289 1290 if (link_ctrl & PCI_EXP_LNKCTL_CLKREQ_EN) 1291 rtw_pci_clkreq_set(rtwdev, true); 1292 1293 rtwpci->link_ctrl = link_ctrl; 1294 } 1295 1296 static void rtw_pci_interface_cfg(struct rtw_dev *rtwdev) 1297 { 1298 struct rtw_chip_info *chip = rtwdev->chip; 1299 1300 switch (chip->id) { 1301 case RTW_CHIP_TYPE_8822C: 1302 if (rtwdev->hal.cut_version >= RTW_CHIP_VER_CUT_D) 1303 rtw_write32_mask(rtwdev, REG_HCI_MIX_CFG, 1304 BIT_PCIE_EMAC_PDN_AUX_TO_FAST_CLK, 1); 1305 break; 1306 default: 1307 break; 1308 } 1309 } 1310 1311 static void rtw_pci_phy_cfg(struct rtw_dev *rtwdev) 1312 { 1313 struct rtw_chip_info *chip = rtwdev->chip; 1314 const struct rtw_intf_phy_para *para; 1315 u16 cut; 1316 u16 value; 1317 u16 offset; 1318 int i; 1319 1320 cut = BIT(0) << rtwdev->hal.cut_version; 1321 1322 for (i = 0; i < chip->intf_table->n_gen1_para; i++) { 1323 para = &chip->intf_table->gen1_para[i]; 1324 if (!(para->cut_mask & cut)) 1325 continue; 1326 if (para->offset == 0xffff) 1327 break; 1328 offset = para->offset; 1329 value = para->value; 1330 if (para->ip_sel == RTW_IP_SEL_PHY) 1331 rtw_mdio_write(rtwdev, offset, value, true); 1332 else 1333 rtw_dbi_write8(rtwdev, offset, value); 1334 } 1335 1336 for (i = 0; i < chip->intf_table->n_gen2_para; i++) { 1337 para = &chip->intf_table->gen2_para[i]; 1338 if (!(para->cut_mask & cut)) 1339 continue; 1340 if (para->offset == 0xffff) 1341 break; 1342 offset = para->offset; 1343 value = para->value; 1344 if (para->ip_sel == RTW_IP_SEL_PHY) 1345 rtw_mdio_write(rtwdev, offset, value, false); 1346 else 1347 rtw_dbi_write8(rtwdev, offset, value); 1348 } 1349 1350 rtw_pci_link_cfg(rtwdev); 1351 } 1352 1353 static int __maybe_unused rtw_pci_suspend(struct device *dev) 1354 { 1355 return 0; 1356 } 1357 1358 static int __maybe_unused rtw_pci_resume(struct device *dev) 1359 { 1360 return 0; 1361 } 1362 1363 SIMPLE_DEV_PM_OPS(rtw_pm_ops, rtw_pci_suspend, rtw_pci_resume); 1364 EXPORT_SYMBOL(rtw_pm_ops); 1365 1366 static int rtw_pci_claim(struct rtw_dev *rtwdev, struct pci_dev *pdev) 1367 { 1368 int ret; 1369 1370 ret = pci_enable_device(pdev); 1371 if (ret) { 1372 rtw_err(rtwdev, "failed to enable pci device\n"); 1373 return ret; 1374 } 1375 1376 pci_set_master(pdev); 1377 pci_set_drvdata(pdev, rtwdev->hw); 1378 SET_IEEE80211_DEV(rtwdev->hw, &pdev->dev); 1379 1380 return 0; 1381 } 1382 1383 static void rtw_pci_declaim(struct rtw_dev *rtwdev, struct pci_dev *pdev) 1384 { 1385 pci_clear_master(pdev); 1386 pci_disable_device(pdev); 1387 } 1388 1389 static int rtw_pci_setup_resource(struct rtw_dev *rtwdev, struct pci_dev *pdev) 1390 { 1391 struct rtw_pci *rtwpci; 1392 int ret; 1393 1394 rtwpci = (struct rtw_pci *)rtwdev->priv; 1395 rtwpci->pdev = pdev; 1396 1397 /* after this driver can access to hw registers */ 1398 ret = rtw_pci_io_mapping(rtwdev, pdev); 1399 if (ret) { 1400 rtw_err(rtwdev, "failed to request pci io region\n"); 1401 goto err_out; 1402 } 1403 1404 ret = rtw_pci_init(rtwdev); 1405 if (ret) { 1406 rtw_err(rtwdev, "failed to allocate pci resources\n"); 1407 goto err_io_unmap; 1408 } 1409 1410 return 0; 1411 1412 err_io_unmap: 1413 rtw_pci_io_unmapping(rtwdev, pdev); 1414 1415 err_out: 1416 return ret; 1417 } 1418 1419 static void rtw_pci_destroy(struct rtw_dev *rtwdev, struct pci_dev *pdev) 1420 { 1421 rtw_pci_deinit(rtwdev); 1422 rtw_pci_io_unmapping(rtwdev, pdev); 1423 } 1424 1425 static struct rtw_hci_ops rtw_pci_ops = { 1426 .tx_write = rtw_pci_tx_write, 1427 .tx_kick_off = rtw_pci_tx_kick_off, 1428 .setup = rtw_pci_setup, 1429 .start = rtw_pci_start, 1430 .stop = rtw_pci_stop, 1431 .deep_ps = rtw_pci_deep_ps, 1432 .link_ps = rtw_pci_link_ps, 1433 .interface_cfg = rtw_pci_interface_cfg, 1434 1435 .read8 = rtw_pci_read8, 1436 .read16 = rtw_pci_read16, 1437 .read32 = rtw_pci_read32, 1438 .write8 = rtw_pci_write8, 1439 .write16 = rtw_pci_write16, 1440 .write32 = rtw_pci_write32, 1441 .write_data_rsvd_page = rtw_pci_write_data_rsvd_page, 1442 .write_data_h2c = rtw_pci_write_data_h2c, 1443 }; 1444 1445 static int rtw_pci_request_irq(struct rtw_dev *rtwdev, struct pci_dev *pdev) 1446 { 1447 unsigned int flags = PCI_IRQ_LEGACY; 1448 int ret; 1449 1450 if (!rtw_disable_msi) 1451 flags |= PCI_IRQ_MSI; 1452 1453 ret = pci_alloc_irq_vectors(pdev, 1, 1, flags); 1454 if (ret < 0) { 1455 rtw_err(rtwdev, "failed to alloc PCI irq vectors\n"); 1456 return ret; 1457 } 1458 1459 ret = devm_request_threaded_irq(rtwdev->dev, pdev->irq, 1460 rtw_pci_interrupt_handler, 1461 rtw_pci_interrupt_threadfn, 1462 IRQF_SHARED, KBUILD_MODNAME, rtwdev); 1463 if (ret) { 1464 rtw_err(rtwdev, "failed to request irq %d\n", ret); 1465 pci_free_irq_vectors(pdev); 1466 } 1467 1468 return ret; 1469 } 1470 1471 static void rtw_pci_free_irq(struct rtw_dev *rtwdev, struct pci_dev *pdev) 1472 { 1473 devm_free_irq(rtwdev->dev, pdev->irq, rtwdev); 1474 pci_free_irq_vectors(pdev); 1475 } 1476 1477 int rtw_pci_probe(struct pci_dev *pdev, 1478 const struct pci_device_id *id) 1479 { 1480 struct ieee80211_hw *hw; 1481 struct rtw_dev *rtwdev; 1482 int drv_data_size; 1483 int ret; 1484 1485 drv_data_size = sizeof(struct rtw_dev) + sizeof(struct rtw_pci); 1486 hw = ieee80211_alloc_hw(drv_data_size, &rtw_ops); 1487 if (!hw) { 1488 dev_err(&pdev->dev, "failed to allocate hw\n"); 1489 return -ENOMEM; 1490 } 1491 1492 rtwdev = hw->priv; 1493 rtwdev->hw = hw; 1494 rtwdev->dev = &pdev->dev; 1495 rtwdev->chip = (struct rtw_chip_info *)id->driver_data; 1496 rtwdev->hci.ops = &rtw_pci_ops; 1497 rtwdev->hci.type = RTW_HCI_TYPE_PCIE; 1498 1499 ret = rtw_core_init(rtwdev); 1500 if (ret) 1501 goto err_release_hw; 1502 1503 rtw_dbg(rtwdev, RTW_DBG_PCI, 1504 "rtw88 pci probe: vendor=0x%4.04X device=0x%4.04X rev=%d\n", 1505 pdev->vendor, pdev->device, pdev->revision); 1506 1507 ret = rtw_pci_claim(rtwdev, pdev); 1508 if (ret) { 1509 rtw_err(rtwdev, "failed to claim pci device\n"); 1510 goto err_deinit_core; 1511 } 1512 1513 ret = rtw_pci_setup_resource(rtwdev, pdev); 1514 if (ret) { 1515 rtw_err(rtwdev, "failed to setup pci resources\n"); 1516 goto err_pci_declaim; 1517 } 1518 1519 ret = rtw_chip_info_setup(rtwdev); 1520 if (ret) { 1521 rtw_err(rtwdev, "failed to setup chip information\n"); 1522 goto err_destroy_pci; 1523 } 1524 1525 rtw_pci_phy_cfg(rtwdev); 1526 1527 ret = rtw_register_hw(rtwdev, hw); 1528 if (ret) { 1529 rtw_err(rtwdev, "failed to register hw\n"); 1530 goto err_destroy_pci; 1531 } 1532 1533 ret = rtw_pci_request_irq(rtwdev, pdev); 1534 if (ret) { 1535 ieee80211_unregister_hw(hw); 1536 goto err_destroy_pci; 1537 } 1538 1539 return 0; 1540 1541 err_destroy_pci: 1542 rtw_pci_destroy(rtwdev, pdev); 1543 1544 err_pci_declaim: 1545 rtw_pci_declaim(rtwdev, pdev); 1546 1547 err_deinit_core: 1548 rtw_core_deinit(rtwdev); 1549 1550 err_release_hw: 1551 ieee80211_free_hw(hw); 1552 1553 return ret; 1554 } 1555 EXPORT_SYMBOL(rtw_pci_probe); 1556 1557 void rtw_pci_remove(struct pci_dev *pdev) 1558 { 1559 struct ieee80211_hw *hw = pci_get_drvdata(pdev); 1560 struct rtw_dev *rtwdev; 1561 struct rtw_pci *rtwpci; 1562 1563 if (!hw) 1564 return; 1565 1566 rtwdev = hw->priv; 1567 rtwpci = (struct rtw_pci *)rtwdev->priv; 1568 1569 rtw_unregister_hw(rtwdev, hw); 1570 rtw_pci_disable_interrupt(rtwdev, rtwpci); 1571 rtw_pci_destroy(rtwdev, pdev); 1572 rtw_pci_declaim(rtwdev, pdev); 1573 rtw_pci_free_irq(rtwdev, pdev); 1574 rtw_core_deinit(rtwdev); 1575 ieee80211_free_hw(hw); 1576 } 1577 EXPORT_SYMBOL(rtw_pci_remove); 1578 1579 void rtw_pci_shutdown(struct pci_dev *pdev) 1580 { 1581 struct ieee80211_hw *hw = pci_get_drvdata(pdev); 1582 struct rtw_dev *rtwdev; 1583 struct rtw_chip_info *chip; 1584 1585 if (!hw) 1586 return; 1587 1588 rtwdev = hw->priv; 1589 chip = rtwdev->chip; 1590 1591 if (chip->ops->shutdown) 1592 chip->ops->shutdown(rtwdev); 1593 } 1594 EXPORT_SYMBOL(rtw_pci_shutdown); 1595 1596 MODULE_AUTHOR("Realtek Corporation"); 1597 MODULE_DESCRIPTION("Realtek 802.11ac wireless PCI driver"); 1598 MODULE_LICENSE("Dual BSD/GPL"); 1599