developer | b11a539 | 2022-03-31 00:34:47 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: ISC |
| 2 | /* |
| 3 | * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> |
| 4 | */ |
| 5 | |
| 6 | #include <linux/module.h> |
| 7 | #include "mt76.h" |
| 8 | #include "usb_trace.h" |
| 9 | #include "dma.h" |
| 10 | |
| 11 | #define MT_VEND_REQ_MAX_RETRY 10 |
| 12 | #define MT_VEND_REQ_TOUT_MS 300 |
| 13 | |
| 14 | static bool disable_usb_sg; |
| 15 | module_param_named(disable_usb_sg, disable_usb_sg, bool, 0644); |
| 16 | MODULE_PARM_DESC(disable_usb_sg, "Disable usb scatter-gather support"); |
| 17 | |
| 18 | int __mt76u_vendor_request(struct mt76_dev *dev, u8 req, u8 req_type, |
| 19 | u16 val, u16 offset, void *buf, size_t len) |
| 20 | { |
| 21 | struct usb_interface *uintf = to_usb_interface(dev->dev); |
| 22 | struct usb_device *udev = interface_to_usbdev(uintf); |
| 23 | unsigned int pipe; |
| 24 | int i, ret; |
| 25 | |
| 26 | lockdep_assert_held(&dev->usb.usb_ctrl_mtx); |
| 27 | |
| 28 | pipe = (req_type & USB_DIR_IN) ? usb_rcvctrlpipe(udev, 0) |
| 29 | : usb_sndctrlpipe(udev, 0); |
| 30 | for (i = 0; i < MT_VEND_REQ_MAX_RETRY; i++) { |
| 31 | if (test_bit(MT76_REMOVED, &dev->phy.state)) |
| 32 | return -EIO; |
| 33 | |
| 34 | ret = usb_control_msg(udev, pipe, req, req_type, val, |
| 35 | offset, buf, len, MT_VEND_REQ_TOUT_MS); |
| 36 | if (ret == -ENODEV) |
| 37 | set_bit(MT76_REMOVED, &dev->phy.state); |
| 38 | if (ret >= 0 || ret == -ENODEV) |
| 39 | return ret; |
| 40 | usleep_range(5000, 10000); |
| 41 | } |
| 42 | |
| 43 | dev_err(dev->dev, "vendor request req:%02x off:%04x failed:%d\n", |
| 44 | req, offset, ret); |
| 45 | return ret; |
| 46 | } |
| 47 | EXPORT_SYMBOL_GPL(__mt76u_vendor_request); |
| 48 | |
| 49 | int mt76u_vendor_request(struct mt76_dev *dev, u8 req, |
| 50 | u8 req_type, u16 val, u16 offset, |
| 51 | void *buf, size_t len) |
| 52 | { |
| 53 | int ret; |
| 54 | |
| 55 | mutex_lock(&dev->usb.usb_ctrl_mtx); |
| 56 | ret = __mt76u_vendor_request(dev, req, req_type, |
| 57 | val, offset, buf, len); |
| 58 | trace_usb_reg_wr(dev, offset, val); |
| 59 | mutex_unlock(&dev->usb.usb_ctrl_mtx); |
| 60 | |
| 61 | return ret; |
| 62 | } |
| 63 | EXPORT_SYMBOL_GPL(mt76u_vendor_request); |
| 64 | |
| 65 | u32 ___mt76u_rr(struct mt76_dev *dev, u8 req, u8 req_type, u32 addr) |
| 66 | { |
| 67 | struct mt76_usb *usb = &dev->usb; |
| 68 | u32 data = ~0; |
| 69 | int ret; |
| 70 | |
| 71 | ret = __mt76u_vendor_request(dev, req, req_type, addr >> 16, |
| 72 | addr, usb->data, sizeof(__le32)); |
| 73 | if (ret == sizeof(__le32)) |
| 74 | data = get_unaligned_le32(usb->data); |
| 75 | trace_usb_reg_rr(dev, addr, data); |
| 76 | |
| 77 | return data; |
| 78 | } |
| 79 | EXPORT_SYMBOL_GPL(___mt76u_rr); |
| 80 | |
| 81 | static u32 __mt76u_rr(struct mt76_dev *dev, u32 addr) |
| 82 | { |
| 83 | u8 req; |
| 84 | |
| 85 | switch (addr & MT_VEND_TYPE_MASK) { |
| 86 | case MT_VEND_TYPE_EEPROM: |
| 87 | req = MT_VEND_READ_EEPROM; |
| 88 | break; |
| 89 | case MT_VEND_TYPE_CFG: |
| 90 | req = MT_VEND_READ_CFG; |
| 91 | break; |
| 92 | default: |
| 93 | req = MT_VEND_MULTI_READ; |
| 94 | break; |
| 95 | } |
| 96 | |
| 97 | return ___mt76u_rr(dev, req, USB_DIR_IN | USB_TYPE_VENDOR, |
| 98 | addr & ~MT_VEND_TYPE_MASK); |
| 99 | } |
| 100 | |
| 101 | static u32 mt76u_rr(struct mt76_dev *dev, u32 addr) |
| 102 | { |
| 103 | u32 ret; |
| 104 | |
| 105 | mutex_lock(&dev->usb.usb_ctrl_mtx); |
| 106 | ret = __mt76u_rr(dev, addr); |
| 107 | mutex_unlock(&dev->usb.usb_ctrl_mtx); |
| 108 | |
| 109 | return ret; |
| 110 | } |
| 111 | |
| 112 | void ___mt76u_wr(struct mt76_dev *dev, u8 req, u8 req_type, |
| 113 | u32 addr, u32 val) |
| 114 | { |
| 115 | struct mt76_usb *usb = &dev->usb; |
| 116 | |
| 117 | put_unaligned_le32(val, usb->data); |
| 118 | __mt76u_vendor_request(dev, req, req_type, addr >> 16, |
| 119 | addr, usb->data, sizeof(__le32)); |
| 120 | trace_usb_reg_wr(dev, addr, val); |
| 121 | } |
| 122 | EXPORT_SYMBOL_GPL(___mt76u_wr); |
| 123 | |
| 124 | static void __mt76u_wr(struct mt76_dev *dev, u32 addr, u32 val) |
| 125 | { |
| 126 | u8 req; |
| 127 | |
| 128 | switch (addr & MT_VEND_TYPE_MASK) { |
| 129 | case MT_VEND_TYPE_CFG: |
| 130 | req = MT_VEND_WRITE_CFG; |
| 131 | break; |
| 132 | default: |
| 133 | req = MT_VEND_MULTI_WRITE; |
| 134 | break; |
| 135 | } |
| 136 | ___mt76u_wr(dev, req, USB_DIR_OUT | USB_TYPE_VENDOR, |
| 137 | addr & ~MT_VEND_TYPE_MASK, val); |
| 138 | } |
| 139 | |
| 140 | static void mt76u_wr(struct mt76_dev *dev, u32 addr, u32 val) |
| 141 | { |
| 142 | mutex_lock(&dev->usb.usb_ctrl_mtx); |
| 143 | __mt76u_wr(dev, addr, val); |
| 144 | mutex_unlock(&dev->usb.usb_ctrl_mtx); |
| 145 | } |
| 146 | |
| 147 | static u32 mt76u_rmw(struct mt76_dev *dev, u32 addr, |
| 148 | u32 mask, u32 val) |
| 149 | { |
| 150 | mutex_lock(&dev->usb.usb_ctrl_mtx); |
| 151 | val |= __mt76u_rr(dev, addr) & ~mask; |
| 152 | __mt76u_wr(dev, addr, val); |
| 153 | mutex_unlock(&dev->usb.usb_ctrl_mtx); |
| 154 | |
| 155 | return val; |
| 156 | } |
| 157 | |
| 158 | static void mt76u_copy(struct mt76_dev *dev, u32 offset, |
| 159 | const void *data, int len) |
| 160 | { |
| 161 | struct mt76_usb *usb = &dev->usb; |
| 162 | const u8 *val = data; |
| 163 | int ret; |
| 164 | int current_batch_size; |
| 165 | int i = 0; |
| 166 | |
| 167 | /* Assure that always a multiple of 4 bytes are copied, |
| 168 | * otherwise beacons can be corrupted. |
| 169 | * See: "mt76: round up length on mt76_wr_copy" |
| 170 | * Commit 850e8f6fbd5d0003b0 |
| 171 | */ |
| 172 | len = round_up(len, 4); |
| 173 | |
| 174 | mutex_lock(&usb->usb_ctrl_mtx); |
| 175 | while (i < len) { |
| 176 | current_batch_size = min_t(int, usb->data_len, len - i); |
| 177 | memcpy(usb->data, val + i, current_batch_size); |
| 178 | ret = __mt76u_vendor_request(dev, MT_VEND_MULTI_WRITE, |
| 179 | USB_DIR_OUT | USB_TYPE_VENDOR, |
| 180 | 0, offset + i, usb->data, |
| 181 | current_batch_size); |
| 182 | if (ret < 0) |
| 183 | break; |
| 184 | |
| 185 | i += current_batch_size; |
| 186 | } |
| 187 | mutex_unlock(&usb->usb_ctrl_mtx); |
| 188 | } |
| 189 | |
| 190 | void mt76u_read_copy(struct mt76_dev *dev, u32 offset, |
| 191 | void *data, int len) |
| 192 | { |
| 193 | struct mt76_usb *usb = &dev->usb; |
| 194 | int i = 0, batch_len, ret; |
| 195 | u8 *val = data; |
| 196 | |
| 197 | len = round_up(len, 4); |
| 198 | mutex_lock(&usb->usb_ctrl_mtx); |
| 199 | while (i < len) { |
| 200 | batch_len = min_t(int, usb->data_len, len - i); |
| 201 | ret = __mt76u_vendor_request(dev, MT_VEND_READ_EXT, |
| 202 | USB_DIR_IN | USB_TYPE_VENDOR, |
| 203 | (offset + i) >> 16, offset + i, |
| 204 | usb->data, batch_len); |
| 205 | if (ret < 0) |
| 206 | break; |
| 207 | |
| 208 | memcpy(val + i, usb->data, batch_len); |
| 209 | i += batch_len; |
| 210 | } |
| 211 | mutex_unlock(&usb->usb_ctrl_mtx); |
| 212 | } |
| 213 | EXPORT_SYMBOL_GPL(mt76u_read_copy); |
| 214 | |
| 215 | void mt76u_single_wr(struct mt76_dev *dev, const u8 req, |
| 216 | const u16 offset, const u32 val) |
| 217 | { |
| 218 | mutex_lock(&dev->usb.usb_ctrl_mtx); |
| 219 | __mt76u_vendor_request(dev, req, |
| 220 | USB_DIR_OUT | USB_TYPE_VENDOR, |
| 221 | val & 0xffff, offset, NULL, 0); |
| 222 | __mt76u_vendor_request(dev, req, |
| 223 | USB_DIR_OUT | USB_TYPE_VENDOR, |
| 224 | val >> 16, offset + 2, NULL, 0); |
| 225 | mutex_unlock(&dev->usb.usb_ctrl_mtx); |
| 226 | } |
| 227 | EXPORT_SYMBOL_GPL(mt76u_single_wr); |
| 228 | |
| 229 | static int |
| 230 | mt76u_req_wr_rp(struct mt76_dev *dev, u32 base, |
| 231 | const struct mt76_reg_pair *data, int len) |
| 232 | { |
| 233 | struct mt76_usb *usb = &dev->usb; |
| 234 | |
| 235 | mutex_lock(&usb->usb_ctrl_mtx); |
| 236 | while (len > 0) { |
| 237 | __mt76u_wr(dev, base + data->reg, data->value); |
| 238 | len--; |
| 239 | data++; |
| 240 | } |
| 241 | mutex_unlock(&usb->usb_ctrl_mtx); |
| 242 | |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static int |
| 247 | mt76u_wr_rp(struct mt76_dev *dev, u32 base, |
| 248 | const struct mt76_reg_pair *data, int n) |
| 249 | { |
| 250 | if (test_bit(MT76_STATE_MCU_RUNNING, &dev->phy.state)) |
| 251 | return dev->mcu_ops->mcu_wr_rp(dev, base, data, n); |
| 252 | else |
| 253 | return mt76u_req_wr_rp(dev, base, data, n); |
| 254 | } |
| 255 | |
| 256 | static int |
| 257 | mt76u_req_rd_rp(struct mt76_dev *dev, u32 base, struct mt76_reg_pair *data, |
| 258 | int len) |
| 259 | { |
| 260 | struct mt76_usb *usb = &dev->usb; |
| 261 | |
| 262 | mutex_lock(&usb->usb_ctrl_mtx); |
| 263 | while (len > 0) { |
| 264 | data->value = __mt76u_rr(dev, base + data->reg); |
| 265 | len--; |
| 266 | data++; |
| 267 | } |
| 268 | mutex_unlock(&usb->usb_ctrl_mtx); |
| 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static int |
| 274 | mt76u_rd_rp(struct mt76_dev *dev, u32 base, |
| 275 | struct mt76_reg_pair *data, int n) |
| 276 | { |
| 277 | if (test_bit(MT76_STATE_MCU_RUNNING, &dev->phy.state)) |
| 278 | return dev->mcu_ops->mcu_rd_rp(dev, base, data, n); |
| 279 | else |
| 280 | return mt76u_req_rd_rp(dev, base, data, n); |
| 281 | } |
| 282 | |
| 283 | static bool mt76u_check_sg(struct mt76_dev *dev) |
| 284 | { |
| 285 | struct usb_interface *uintf = to_usb_interface(dev->dev); |
| 286 | struct usb_device *udev = interface_to_usbdev(uintf); |
| 287 | |
| 288 | return (!disable_usb_sg && udev->bus->sg_tablesize > 0 && |
| 289 | (udev->bus->no_sg_constraint || |
| 290 | udev->speed == USB_SPEED_WIRELESS)); |
| 291 | } |
| 292 | |
| 293 | static int |
| 294 | mt76u_set_endpoints(struct usb_interface *intf, |
| 295 | struct mt76_usb *usb) |
| 296 | { |
| 297 | struct usb_host_interface *intf_desc = intf->cur_altsetting; |
| 298 | struct usb_endpoint_descriptor *ep_desc; |
| 299 | int i, in_ep = 0, out_ep = 0; |
| 300 | |
| 301 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { |
| 302 | ep_desc = &intf_desc->endpoint[i].desc; |
| 303 | |
| 304 | if (usb_endpoint_is_bulk_in(ep_desc) && |
| 305 | in_ep < __MT_EP_IN_MAX) { |
| 306 | usb->in_ep[in_ep] = usb_endpoint_num(ep_desc); |
| 307 | in_ep++; |
| 308 | } else if (usb_endpoint_is_bulk_out(ep_desc) && |
| 309 | out_ep < __MT_EP_OUT_MAX) { |
| 310 | usb->out_ep[out_ep] = usb_endpoint_num(ep_desc); |
| 311 | out_ep++; |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | if (in_ep != __MT_EP_IN_MAX || out_ep != __MT_EP_OUT_MAX) |
| 316 | return -EINVAL; |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | static int |
| 321 | mt76u_fill_rx_sg(struct mt76_dev *dev, struct mt76_queue *q, struct urb *urb, |
| 322 | int nsgs, gfp_t gfp) |
| 323 | { |
| 324 | int i; |
| 325 | |
| 326 | for (i = 0; i < nsgs; i++) { |
| 327 | struct page *page; |
| 328 | void *data; |
| 329 | int offset; |
| 330 | |
| 331 | data = page_frag_alloc(&q->rx_page, q->buf_size, gfp); |
| 332 | if (!data) |
| 333 | break; |
| 334 | |
| 335 | page = virt_to_head_page(data); |
| 336 | offset = data - page_address(page); |
| 337 | sg_set_page(&urb->sg[i], page, q->buf_size, offset); |
| 338 | } |
| 339 | |
| 340 | if (i < nsgs) { |
| 341 | int j; |
| 342 | |
| 343 | for (j = nsgs; j < urb->num_sgs; j++) |
| 344 | skb_free_frag(sg_virt(&urb->sg[j])); |
| 345 | urb->num_sgs = i; |
| 346 | } |
| 347 | |
| 348 | urb->num_sgs = max_t(int, i, urb->num_sgs); |
| 349 | urb->transfer_buffer_length = urb->num_sgs * q->buf_size; |
| 350 | sg_init_marker(urb->sg, urb->num_sgs); |
| 351 | |
| 352 | return i ? : -ENOMEM; |
| 353 | } |
| 354 | |
| 355 | static int |
| 356 | mt76u_refill_rx(struct mt76_dev *dev, struct mt76_queue *q, |
| 357 | struct urb *urb, int nsgs, gfp_t gfp) |
| 358 | { |
| 359 | enum mt76_rxq_id qid = q - &dev->q_rx[MT_RXQ_MAIN]; |
| 360 | |
| 361 | if (qid == MT_RXQ_MAIN && dev->usb.sg_en) |
| 362 | return mt76u_fill_rx_sg(dev, q, urb, nsgs, gfp); |
| 363 | |
| 364 | urb->transfer_buffer_length = q->buf_size; |
| 365 | urb->transfer_buffer = page_frag_alloc(&q->rx_page, q->buf_size, gfp); |
| 366 | |
| 367 | return urb->transfer_buffer ? 0 : -ENOMEM; |
| 368 | } |
| 369 | |
| 370 | static int |
| 371 | mt76u_urb_alloc(struct mt76_dev *dev, struct mt76_queue_entry *e, |
| 372 | int sg_max_size) |
| 373 | { |
| 374 | unsigned int size = sizeof(struct urb); |
| 375 | |
| 376 | if (dev->usb.sg_en) |
| 377 | size += sg_max_size * sizeof(struct scatterlist); |
| 378 | |
| 379 | e->urb = kzalloc(size, GFP_KERNEL); |
| 380 | if (!e->urb) |
| 381 | return -ENOMEM; |
| 382 | |
| 383 | usb_init_urb(e->urb); |
| 384 | |
| 385 | if (dev->usb.sg_en && sg_max_size > 0) |
| 386 | e->urb->sg = (struct scatterlist *)(e->urb + 1); |
| 387 | |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | static int |
| 392 | mt76u_rx_urb_alloc(struct mt76_dev *dev, struct mt76_queue *q, |
| 393 | struct mt76_queue_entry *e) |
| 394 | { |
| 395 | enum mt76_rxq_id qid = q - &dev->q_rx[MT_RXQ_MAIN]; |
| 396 | int err, sg_size; |
| 397 | |
| 398 | sg_size = qid == MT_RXQ_MAIN ? MT_RX_SG_MAX_SIZE : 0; |
| 399 | err = mt76u_urb_alloc(dev, e, sg_size); |
| 400 | if (err) |
| 401 | return err; |
| 402 | |
| 403 | return mt76u_refill_rx(dev, q, e->urb, sg_size, GFP_KERNEL); |
| 404 | } |
| 405 | |
| 406 | static void mt76u_urb_free(struct urb *urb) |
| 407 | { |
| 408 | int i; |
| 409 | |
| 410 | for (i = 0; i < urb->num_sgs; i++) |
| 411 | skb_free_frag(sg_virt(&urb->sg[i])); |
| 412 | |
| 413 | if (urb->transfer_buffer) |
| 414 | skb_free_frag(urb->transfer_buffer); |
| 415 | |
| 416 | usb_free_urb(urb); |
| 417 | } |
| 418 | |
| 419 | static void |
| 420 | mt76u_fill_bulk_urb(struct mt76_dev *dev, int dir, int index, |
| 421 | struct urb *urb, usb_complete_t complete_fn, |
| 422 | void *context) |
| 423 | { |
| 424 | struct usb_interface *uintf = to_usb_interface(dev->dev); |
| 425 | struct usb_device *udev = interface_to_usbdev(uintf); |
| 426 | unsigned int pipe; |
| 427 | |
| 428 | if (dir == USB_DIR_IN) |
| 429 | pipe = usb_rcvbulkpipe(udev, dev->usb.in_ep[index]); |
| 430 | else |
| 431 | pipe = usb_sndbulkpipe(udev, dev->usb.out_ep[index]); |
| 432 | |
| 433 | urb->dev = udev; |
| 434 | urb->pipe = pipe; |
| 435 | urb->complete = complete_fn; |
| 436 | urb->context = context; |
| 437 | } |
| 438 | |
| 439 | static struct urb * |
| 440 | mt76u_get_next_rx_entry(struct mt76_queue *q) |
| 441 | { |
| 442 | struct urb *urb = NULL; |
| 443 | unsigned long flags; |
| 444 | |
| 445 | spin_lock_irqsave(&q->lock, flags); |
| 446 | if (q->queued > 0) { |
| 447 | urb = q->entry[q->tail].urb; |
| 448 | q->tail = (q->tail + 1) % q->ndesc; |
| 449 | q->queued--; |
| 450 | } |
| 451 | spin_unlock_irqrestore(&q->lock, flags); |
| 452 | |
| 453 | return urb; |
| 454 | } |
| 455 | |
| 456 | static int |
| 457 | mt76u_get_rx_entry_len(struct mt76_dev *dev, u8 *data, |
| 458 | u32 data_len) |
| 459 | { |
| 460 | u16 dma_len, min_len; |
| 461 | |
| 462 | dma_len = get_unaligned_le16(data); |
| 463 | if (dev->drv->drv_flags & MT_DRV_RX_DMA_HDR) |
| 464 | return dma_len; |
| 465 | |
| 466 | min_len = MT_DMA_HDR_LEN + MT_RX_RXWI_LEN + MT_FCE_INFO_LEN; |
| 467 | if (data_len < min_len || !dma_len || |
| 468 | dma_len + MT_DMA_HDR_LEN > data_len || |
| 469 | (dma_len & 0x3)) |
| 470 | return -EINVAL; |
| 471 | return dma_len; |
| 472 | } |
| 473 | |
| 474 | static struct sk_buff * |
| 475 | mt76u_build_rx_skb(struct mt76_dev *dev, void *data, |
| 476 | int len, int buf_size) |
| 477 | { |
| 478 | int head_room, drv_flags = dev->drv->drv_flags; |
| 479 | struct sk_buff *skb; |
| 480 | |
| 481 | head_room = drv_flags & MT_DRV_RX_DMA_HDR ? 0 : MT_DMA_HDR_LEN; |
| 482 | if (SKB_WITH_OVERHEAD(buf_size) < head_room + len) { |
| 483 | struct page *page; |
| 484 | |
| 485 | /* slow path, not enough space for data and |
| 486 | * skb_shared_info |
| 487 | */ |
| 488 | skb = alloc_skb(MT_SKB_HEAD_LEN, GFP_ATOMIC); |
| 489 | if (!skb) |
| 490 | return NULL; |
| 491 | |
| 492 | skb_put_data(skb, data + head_room, MT_SKB_HEAD_LEN); |
| 493 | data += head_room + MT_SKB_HEAD_LEN; |
| 494 | page = virt_to_head_page(data); |
| 495 | skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, |
| 496 | page, data - page_address(page), |
| 497 | len - MT_SKB_HEAD_LEN, buf_size); |
| 498 | |
| 499 | return skb; |
| 500 | } |
| 501 | |
| 502 | /* fast path */ |
| 503 | skb = build_skb(data, buf_size); |
| 504 | if (!skb) |
| 505 | return NULL; |
| 506 | |
| 507 | skb_reserve(skb, head_room); |
| 508 | __skb_put(skb, len); |
| 509 | |
| 510 | return skb; |
| 511 | } |
| 512 | |
| 513 | static int |
| 514 | mt76u_process_rx_entry(struct mt76_dev *dev, struct urb *urb, |
| 515 | int buf_size) |
| 516 | { |
| 517 | u8 *data = urb->num_sgs ? sg_virt(&urb->sg[0]) : urb->transfer_buffer; |
| 518 | int data_len = urb->num_sgs ? urb->sg[0].length : urb->actual_length; |
| 519 | int len, nsgs = 1, head_room, drv_flags = dev->drv->drv_flags; |
| 520 | struct sk_buff *skb; |
| 521 | |
| 522 | if (!test_bit(MT76_STATE_INITIALIZED, &dev->phy.state)) |
| 523 | return 0; |
| 524 | |
| 525 | len = mt76u_get_rx_entry_len(dev, data, urb->actual_length); |
| 526 | if (len < 0) |
| 527 | return 0; |
| 528 | |
| 529 | head_room = drv_flags & MT_DRV_RX_DMA_HDR ? 0 : MT_DMA_HDR_LEN; |
| 530 | data_len = min_t(int, len, data_len - head_room); |
| 531 | skb = mt76u_build_rx_skb(dev, data, data_len, buf_size); |
| 532 | if (!skb) |
| 533 | return 0; |
| 534 | |
| 535 | len -= data_len; |
| 536 | while (len > 0 && nsgs < urb->num_sgs) { |
| 537 | data_len = min_t(int, len, urb->sg[nsgs].length); |
| 538 | skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, |
| 539 | sg_page(&urb->sg[nsgs]), |
| 540 | urb->sg[nsgs].offset, data_len, |
| 541 | buf_size); |
| 542 | len -= data_len; |
| 543 | nsgs++; |
| 544 | } |
| 545 | dev->drv->rx_skb(dev, MT_RXQ_MAIN, skb); |
| 546 | |
| 547 | return nsgs; |
| 548 | } |
| 549 | |
| 550 | static void mt76u_complete_rx(struct urb *urb) |
| 551 | { |
| 552 | struct mt76_dev *dev = dev_get_drvdata(&urb->dev->dev); |
| 553 | struct mt76_queue *q = urb->context; |
| 554 | unsigned long flags; |
| 555 | |
| 556 | trace_rx_urb(dev, urb); |
| 557 | |
| 558 | switch (urb->status) { |
| 559 | case -ECONNRESET: |
| 560 | case -ESHUTDOWN: |
| 561 | case -ENOENT: |
| 562 | case -EPROTO: |
| 563 | return; |
| 564 | default: |
| 565 | dev_err_ratelimited(dev->dev, "rx urb failed: %d\n", |
| 566 | urb->status); |
| 567 | fallthrough; |
| 568 | case 0: |
| 569 | break; |
| 570 | } |
| 571 | |
| 572 | spin_lock_irqsave(&q->lock, flags); |
| 573 | if (WARN_ONCE(q->entry[q->head].urb != urb, "rx urb mismatch")) |
| 574 | goto out; |
| 575 | |
| 576 | q->head = (q->head + 1) % q->ndesc; |
| 577 | q->queued++; |
| 578 | mt76_worker_schedule(&dev->usb.rx_worker); |
| 579 | out: |
| 580 | spin_unlock_irqrestore(&q->lock, flags); |
| 581 | } |
| 582 | |
| 583 | static int |
| 584 | mt76u_submit_rx_buf(struct mt76_dev *dev, enum mt76_rxq_id qid, |
| 585 | struct urb *urb) |
| 586 | { |
| 587 | int ep = qid == MT_RXQ_MAIN ? MT_EP_IN_PKT_RX : MT_EP_IN_CMD_RESP; |
| 588 | |
| 589 | mt76u_fill_bulk_urb(dev, USB_DIR_IN, ep, urb, |
| 590 | mt76u_complete_rx, &dev->q_rx[qid]); |
| 591 | trace_submit_urb(dev, urb); |
| 592 | |
| 593 | return usb_submit_urb(urb, GFP_ATOMIC); |
| 594 | } |
| 595 | |
| 596 | static void |
| 597 | mt76u_process_rx_queue(struct mt76_dev *dev, struct mt76_queue *q) |
| 598 | { |
| 599 | int qid = q - &dev->q_rx[MT_RXQ_MAIN]; |
| 600 | struct urb *urb; |
| 601 | int err, count; |
| 602 | |
| 603 | while (true) { |
| 604 | urb = mt76u_get_next_rx_entry(q); |
| 605 | if (!urb) |
| 606 | break; |
| 607 | |
| 608 | count = mt76u_process_rx_entry(dev, urb, q->buf_size); |
| 609 | if (count > 0) { |
| 610 | err = mt76u_refill_rx(dev, q, urb, count, GFP_ATOMIC); |
| 611 | if (err < 0) |
| 612 | break; |
| 613 | } |
| 614 | mt76u_submit_rx_buf(dev, qid, urb); |
| 615 | } |
| 616 | if (qid == MT_RXQ_MAIN) { |
| 617 | local_bh_disable(); |
| 618 | mt76_rx_poll_complete(dev, MT_RXQ_MAIN, NULL); |
| 619 | local_bh_enable(); |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | static void mt76u_rx_worker(struct mt76_worker *w) |
| 624 | { |
| 625 | struct mt76_usb *usb = container_of(w, struct mt76_usb, rx_worker); |
| 626 | struct mt76_dev *dev = container_of(usb, struct mt76_dev, usb); |
| 627 | int i; |
| 628 | |
| 629 | rcu_read_lock(); |
| 630 | mt76_for_each_q_rx(dev, i) |
| 631 | mt76u_process_rx_queue(dev, &dev->q_rx[i]); |
| 632 | rcu_read_unlock(); |
| 633 | } |
| 634 | |
| 635 | static int |
| 636 | mt76u_submit_rx_buffers(struct mt76_dev *dev, enum mt76_rxq_id qid) |
| 637 | { |
| 638 | struct mt76_queue *q = &dev->q_rx[qid]; |
| 639 | unsigned long flags; |
| 640 | int i, err = 0; |
| 641 | |
| 642 | spin_lock_irqsave(&q->lock, flags); |
| 643 | for (i = 0; i < q->ndesc; i++) { |
| 644 | err = mt76u_submit_rx_buf(dev, qid, q->entry[i].urb); |
| 645 | if (err < 0) |
| 646 | break; |
| 647 | } |
| 648 | q->head = q->tail = 0; |
| 649 | q->queued = 0; |
| 650 | spin_unlock_irqrestore(&q->lock, flags); |
| 651 | |
| 652 | return err; |
| 653 | } |
| 654 | |
| 655 | static int |
| 656 | mt76u_alloc_rx_queue(struct mt76_dev *dev, enum mt76_rxq_id qid) |
| 657 | { |
| 658 | struct mt76_queue *q = &dev->q_rx[qid]; |
| 659 | int i, err; |
| 660 | |
| 661 | spin_lock_init(&q->lock); |
| 662 | q->entry = devm_kcalloc(dev->dev, |
| 663 | MT_NUM_RX_ENTRIES, sizeof(*q->entry), |
| 664 | GFP_KERNEL); |
| 665 | if (!q->entry) |
| 666 | return -ENOMEM; |
| 667 | |
| 668 | q->ndesc = MT_NUM_RX_ENTRIES; |
| 669 | q->buf_size = PAGE_SIZE; |
| 670 | |
| 671 | for (i = 0; i < q->ndesc; i++) { |
| 672 | err = mt76u_rx_urb_alloc(dev, q, &q->entry[i]); |
| 673 | if (err < 0) |
| 674 | return err; |
| 675 | } |
| 676 | |
| 677 | return mt76u_submit_rx_buffers(dev, qid); |
| 678 | } |
| 679 | |
| 680 | int mt76u_alloc_mcu_queue(struct mt76_dev *dev) |
| 681 | { |
| 682 | return mt76u_alloc_rx_queue(dev, MT_RXQ_MCU); |
| 683 | } |
| 684 | EXPORT_SYMBOL_GPL(mt76u_alloc_mcu_queue); |
| 685 | |
| 686 | static void |
| 687 | mt76u_free_rx_queue(struct mt76_dev *dev, struct mt76_queue *q) |
| 688 | { |
| 689 | struct page *page; |
| 690 | int i; |
| 691 | |
| 692 | for (i = 0; i < q->ndesc; i++) { |
| 693 | if (!q->entry[i].urb) |
| 694 | continue; |
| 695 | |
| 696 | mt76u_urb_free(q->entry[i].urb); |
| 697 | q->entry[i].urb = NULL; |
| 698 | } |
| 699 | |
| 700 | if (!q->rx_page.va) |
| 701 | return; |
| 702 | |
| 703 | page = virt_to_page(q->rx_page.va); |
| 704 | __page_frag_cache_drain(page, q->rx_page.pagecnt_bias); |
| 705 | memset(&q->rx_page, 0, sizeof(q->rx_page)); |
| 706 | } |
| 707 | |
| 708 | static void mt76u_free_rx(struct mt76_dev *dev) |
| 709 | { |
| 710 | int i; |
| 711 | |
| 712 | mt76_worker_teardown(&dev->usb.rx_worker); |
| 713 | |
| 714 | mt76_for_each_q_rx(dev, i) |
| 715 | mt76u_free_rx_queue(dev, &dev->q_rx[i]); |
| 716 | } |
| 717 | |
| 718 | void mt76u_stop_rx(struct mt76_dev *dev) |
| 719 | { |
| 720 | int i; |
| 721 | |
| 722 | mt76_worker_disable(&dev->usb.rx_worker); |
| 723 | |
| 724 | mt76_for_each_q_rx(dev, i) { |
| 725 | struct mt76_queue *q = &dev->q_rx[i]; |
| 726 | int j; |
| 727 | |
| 728 | for (j = 0; j < q->ndesc; j++) |
| 729 | usb_poison_urb(q->entry[j].urb); |
| 730 | } |
| 731 | } |
| 732 | EXPORT_SYMBOL_GPL(mt76u_stop_rx); |
| 733 | |
| 734 | int mt76u_resume_rx(struct mt76_dev *dev) |
| 735 | { |
| 736 | int i; |
| 737 | |
| 738 | mt76_for_each_q_rx(dev, i) { |
| 739 | struct mt76_queue *q = &dev->q_rx[i]; |
| 740 | int err, j; |
| 741 | |
| 742 | for (j = 0; j < q->ndesc; j++) |
| 743 | usb_unpoison_urb(q->entry[j].urb); |
| 744 | |
| 745 | err = mt76u_submit_rx_buffers(dev, i); |
| 746 | if (err < 0) |
| 747 | return err; |
| 748 | } |
| 749 | |
| 750 | mt76_worker_enable(&dev->usb.rx_worker); |
| 751 | |
| 752 | return 0; |
| 753 | } |
| 754 | EXPORT_SYMBOL_GPL(mt76u_resume_rx); |
| 755 | |
| 756 | static void mt76u_status_worker(struct mt76_worker *w) |
| 757 | { |
| 758 | struct mt76_usb *usb = container_of(w, struct mt76_usb, status_worker); |
| 759 | struct mt76_dev *dev = container_of(usb, struct mt76_dev, usb); |
| 760 | struct mt76_queue_entry entry; |
| 761 | struct mt76_queue *q; |
| 762 | int i; |
| 763 | |
| 764 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
| 765 | q = dev->phy.q_tx[i]; |
| 766 | if (!q) |
| 767 | continue; |
| 768 | |
| 769 | while (q->queued > 0) { |
| 770 | if (!q->entry[q->tail].done) |
| 771 | break; |
| 772 | |
| 773 | entry = q->entry[q->tail]; |
| 774 | q->entry[q->tail].done = false; |
| 775 | |
| 776 | mt76_queue_tx_complete(dev, q, &entry); |
| 777 | } |
| 778 | |
| 779 | if (!q->queued) |
| 780 | wake_up(&dev->tx_wait); |
| 781 | |
| 782 | mt76_worker_schedule(&dev->tx_worker); |
| 783 | |
| 784 | if (dev->drv->tx_status_data && |
| 785 | !test_and_set_bit(MT76_READING_STATS, &dev->phy.state)) |
| 786 | queue_work(dev->wq, &dev->usb.stat_work); |
| 787 | } |
| 788 | } |
| 789 | |
| 790 | static void mt76u_tx_status_data(struct work_struct *work) |
| 791 | { |
| 792 | struct mt76_usb *usb; |
| 793 | struct mt76_dev *dev; |
| 794 | u8 update = 1; |
| 795 | u16 count = 0; |
| 796 | |
| 797 | usb = container_of(work, struct mt76_usb, stat_work); |
| 798 | dev = container_of(usb, struct mt76_dev, usb); |
| 799 | |
| 800 | while (true) { |
| 801 | if (test_bit(MT76_REMOVED, &dev->phy.state)) |
| 802 | break; |
| 803 | |
| 804 | if (!dev->drv->tx_status_data(dev, &update)) |
| 805 | break; |
| 806 | count++; |
| 807 | } |
| 808 | |
| 809 | if (count && test_bit(MT76_STATE_RUNNING, &dev->phy.state)) |
| 810 | queue_work(dev->wq, &usb->stat_work); |
| 811 | else |
| 812 | clear_bit(MT76_READING_STATS, &dev->phy.state); |
| 813 | } |
| 814 | |
| 815 | static void mt76u_complete_tx(struct urb *urb) |
| 816 | { |
| 817 | struct mt76_dev *dev = dev_get_drvdata(&urb->dev->dev); |
| 818 | struct mt76_queue_entry *e = urb->context; |
| 819 | |
| 820 | if (mt76u_urb_error(urb)) |
| 821 | dev_err(dev->dev, "tx urb failed: %d\n", urb->status); |
| 822 | e->done = true; |
| 823 | |
| 824 | mt76_worker_schedule(&dev->usb.status_worker); |
| 825 | } |
| 826 | |
| 827 | static int |
| 828 | mt76u_tx_setup_buffers(struct mt76_dev *dev, struct sk_buff *skb, |
| 829 | struct urb *urb) |
| 830 | { |
| 831 | urb->transfer_buffer_length = skb->len; |
| 832 | |
| 833 | if (!dev->usb.sg_en) { |
| 834 | urb->transfer_buffer = skb->data; |
| 835 | return 0; |
| 836 | } |
| 837 | |
| 838 | sg_init_table(urb->sg, MT_TX_SG_MAX_SIZE); |
| 839 | urb->num_sgs = skb_to_sgvec(skb, urb->sg, 0, skb->len); |
| 840 | if (!urb->num_sgs) |
| 841 | return -ENOMEM; |
| 842 | |
| 843 | return urb->num_sgs; |
| 844 | } |
| 845 | |
| 846 | static int |
| 847 | mt76u_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q, |
| 848 | struct sk_buff *skb, struct mt76_wcid *wcid, |
| 849 | struct ieee80211_sta *sta) |
| 850 | { |
| 851 | struct mt76_tx_info tx_info = { |
| 852 | .skb = skb, |
| 853 | }; |
| 854 | u16 idx = q->head; |
| 855 | int err; |
| 856 | |
| 857 | if (q->queued == q->ndesc) |
| 858 | return -ENOSPC; |
| 859 | |
| 860 | skb->prev = skb->next = NULL; |
| 861 | err = dev->drv->tx_prepare_skb(dev, NULL, q->qid, wcid, sta, &tx_info); |
| 862 | if (err < 0) |
| 863 | return err; |
| 864 | |
| 865 | err = mt76u_tx_setup_buffers(dev, tx_info.skb, q->entry[idx].urb); |
| 866 | if (err < 0) |
| 867 | return err; |
| 868 | |
| 869 | mt76u_fill_bulk_urb(dev, USB_DIR_OUT, q2ep(q->hw_idx), |
| 870 | q->entry[idx].urb, mt76u_complete_tx, |
| 871 | &q->entry[idx]); |
| 872 | |
| 873 | q->head = (q->head + 1) % q->ndesc; |
| 874 | q->entry[idx].skb = tx_info.skb; |
| 875 | q->entry[idx].wcid = 0xffff; |
| 876 | q->queued++; |
| 877 | |
| 878 | return idx; |
| 879 | } |
| 880 | |
| 881 | static void mt76u_tx_kick(struct mt76_dev *dev, struct mt76_queue *q) |
| 882 | { |
| 883 | struct urb *urb; |
| 884 | int err; |
| 885 | |
| 886 | while (q->first != q->head) { |
| 887 | urb = q->entry[q->first].urb; |
| 888 | |
| 889 | trace_submit_urb(dev, urb); |
| 890 | err = usb_submit_urb(urb, GFP_ATOMIC); |
| 891 | if (err < 0) { |
| 892 | if (err == -ENODEV) |
| 893 | set_bit(MT76_REMOVED, &dev->phy.state); |
| 894 | else |
| 895 | dev_err(dev->dev, "tx urb submit failed:%d\n", |
| 896 | err); |
| 897 | break; |
| 898 | } |
| 899 | q->first = (q->first + 1) % q->ndesc; |
| 900 | } |
| 901 | } |
| 902 | |
| 903 | static u8 mt76u_ac_to_hwq(struct mt76_dev *dev, u8 ac) |
| 904 | { |
| 905 | if (mt76_chip(dev) == 0x7663) { |
| 906 | static const u8 lmac_queue_map[] = { |
| 907 | /* ac to lmac mapping */ |
| 908 | [IEEE80211_AC_BK] = 0, |
| 909 | [IEEE80211_AC_BE] = 1, |
| 910 | [IEEE80211_AC_VI] = 2, |
| 911 | [IEEE80211_AC_VO] = 4, |
| 912 | }; |
| 913 | |
| 914 | if (WARN_ON(ac >= ARRAY_SIZE(lmac_queue_map))) |
| 915 | return 1; /* BE */ |
| 916 | |
| 917 | return lmac_queue_map[ac]; |
| 918 | } |
| 919 | |
| 920 | return mt76_ac_to_hwq(ac); |
| 921 | } |
| 922 | |
| 923 | static int mt76u_alloc_tx(struct mt76_dev *dev) |
| 924 | { |
| 925 | struct mt76_queue *q; |
| 926 | int i, j, err; |
| 927 | |
| 928 | for (i = 0; i <= MT_TXQ_PSD; i++) { |
| 929 | if (i >= IEEE80211_NUM_ACS) { |
| 930 | dev->phy.q_tx[i] = dev->phy.q_tx[0]; |
| 931 | continue; |
| 932 | } |
| 933 | |
| 934 | q = devm_kzalloc(dev->dev, sizeof(*q), GFP_KERNEL); |
| 935 | if (!q) |
| 936 | return -ENOMEM; |
| 937 | |
| 938 | spin_lock_init(&q->lock); |
| 939 | q->hw_idx = mt76u_ac_to_hwq(dev, i); |
| 940 | q->qid = i; |
| 941 | |
| 942 | dev->phy.q_tx[i] = q; |
| 943 | |
| 944 | q->entry = devm_kcalloc(dev->dev, |
| 945 | MT_NUM_TX_ENTRIES, sizeof(*q->entry), |
| 946 | GFP_KERNEL); |
| 947 | if (!q->entry) |
| 948 | return -ENOMEM; |
| 949 | |
| 950 | q->ndesc = MT_NUM_TX_ENTRIES; |
| 951 | for (j = 0; j < q->ndesc; j++) { |
| 952 | err = mt76u_urb_alloc(dev, &q->entry[j], |
| 953 | MT_TX_SG_MAX_SIZE); |
| 954 | if (err < 0) |
| 955 | return err; |
| 956 | } |
| 957 | } |
| 958 | return 0; |
| 959 | } |
| 960 | |
| 961 | static void mt76u_free_tx(struct mt76_dev *dev) |
| 962 | { |
| 963 | int i; |
| 964 | |
| 965 | mt76_worker_teardown(&dev->usb.status_worker); |
| 966 | |
| 967 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
| 968 | struct mt76_queue *q; |
| 969 | int j; |
| 970 | |
| 971 | q = dev->phy.q_tx[i]; |
| 972 | if (!q) |
| 973 | continue; |
| 974 | |
| 975 | for (j = 0; j < q->ndesc; j++) { |
| 976 | usb_free_urb(q->entry[j].urb); |
| 977 | q->entry[j].urb = NULL; |
| 978 | } |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | void mt76u_stop_tx(struct mt76_dev *dev) |
| 983 | { |
| 984 | int ret; |
| 985 | |
| 986 | mt76_worker_disable(&dev->usb.status_worker); |
| 987 | |
| 988 | ret = wait_event_timeout(dev->tx_wait, !mt76_has_tx_pending(&dev->phy), |
| 989 | HZ / 5); |
| 990 | if (!ret) { |
| 991 | struct mt76_queue_entry entry; |
| 992 | struct mt76_queue *q; |
| 993 | int i, j; |
| 994 | |
| 995 | dev_err(dev->dev, "timed out waiting for pending tx\n"); |
| 996 | |
| 997 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
| 998 | q = dev->phy.q_tx[i]; |
| 999 | if (!q) |
| 1000 | continue; |
| 1001 | |
| 1002 | for (j = 0; j < q->ndesc; j++) |
| 1003 | usb_kill_urb(q->entry[j].urb); |
| 1004 | } |
| 1005 | |
| 1006 | mt76_worker_disable(&dev->tx_worker); |
| 1007 | |
| 1008 | /* On device removal we maight queue skb's, but mt76u_tx_kick() |
| 1009 | * will fail to submit urb, cleanup those skb's manually. |
| 1010 | */ |
| 1011 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
| 1012 | q = dev->phy.q_tx[i]; |
| 1013 | if (!q) |
| 1014 | continue; |
| 1015 | |
| 1016 | while (q->queued > 0) { |
| 1017 | entry = q->entry[q->tail]; |
| 1018 | q->entry[q->tail].done = false; |
| 1019 | mt76_queue_tx_complete(dev, q, &entry); |
| 1020 | } |
| 1021 | } |
| 1022 | |
| 1023 | mt76_worker_enable(&dev->tx_worker); |
| 1024 | } |
| 1025 | |
| 1026 | cancel_work_sync(&dev->usb.stat_work); |
| 1027 | clear_bit(MT76_READING_STATS, &dev->phy.state); |
| 1028 | |
| 1029 | mt76_worker_enable(&dev->usb.status_worker); |
| 1030 | |
| 1031 | mt76_tx_status_check(dev, true); |
| 1032 | } |
| 1033 | EXPORT_SYMBOL_GPL(mt76u_stop_tx); |
| 1034 | |
| 1035 | void mt76u_queues_deinit(struct mt76_dev *dev) |
| 1036 | { |
| 1037 | mt76u_stop_rx(dev); |
| 1038 | mt76u_stop_tx(dev); |
| 1039 | |
| 1040 | mt76u_free_rx(dev); |
| 1041 | mt76u_free_tx(dev); |
| 1042 | } |
| 1043 | EXPORT_SYMBOL_GPL(mt76u_queues_deinit); |
| 1044 | |
| 1045 | int mt76u_alloc_queues(struct mt76_dev *dev) |
| 1046 | { |
| 1047 | int err; |
| 1048 | |
| 1049 | err = mt76u_alloc_rx_queue(dev, MT_RXQ_MAIN); |
| 1050 | if (err < 0) |
| 1051 | return err; |
| 1052 | |
| 1053 | return mt76u_alloc_tx(dev); |
| 1054 | } |
| 1055 | EXPORT_SYMBOL_GPL(mt76u_alloc_queues); |
| 1056 | |
| 1057 | static const struct mt76_queue_ops usb_queue_ops = { |
| 1058 | .tx_queue_skb = mt76u_tx_queue_skb, |
| 1059 | .kick = mt76u_tx_kick, |
| 1060 | }; |
| 1061 | |
| 1062 | int __mt76u_init(struct mt76_dev *dev, struct usb_interface *intf, |
| 1063 | struct mt76_bus_ops *ops) |
| 1064 | { |
| 1065 | struct usb_device *udev = interface_to_usbdev(intf); |
| 1066 | struct mt76_usb *usb = &dev->usb; |
| 1067 | int err; |
| 1068 | |
| 1069 | INIT_WORK(&usb->stat_work, mt76u_tx_status_data); |
| 1070 | |
| 1071 | usb->data_len = usb_maxpacket(udev, usb_sndctrlpipe(udev, 0), 1); |
| 1072 | if (usb->data_len < 32) |
| 1073 | usb->data_len = 32; |
| 1074 | |
| 1075 | usb->data = devm_kmalloc(dev->dev, usb->data_len, GFP_KERNEL); |
| 1076 | if (!usb->data) |
| 1077 | return -ENOMEM; |
| 1078 | |
| 1079 | mutex_init(&usb->usb_ctrl_mtx); |
| 1080 | dev->bus = ops; |
| 1081 | dev->queue_ops = &usb_queue_ops; |
| 1082 | |
| 1083 | dev_set_drvdata(&udev->dev, dev); |
| 1084 | |
| 1085 | usb->sg_en = mt76u_check_sg(dev); |
| 1086 | |
| 1087 | err = mt76u_set_endpoints(intf, usb); |
| 1088 | if (err < 0) |
| 1089 | return err; |
| 1090 | |
| 1091 | err = mt76_worker_setup(dev->hw, &usb->rx_worker, mt76u_rx_worker, |
| 1092 | "usb-rx"); |
| 1093 | if (err) |
| 1094 | return err; |
| 1095 | |
| 1096 | err = mt76_worker_setup(dev->hw, &usb->status_worker, |
| 1097 | mt76u_status_worker, "usb-status"); |
| 1098 | if (err) |
| 1099 | return err; |
| 1100 | |
| 1101 | sched_set_fifo_low(usb->rx_worker.task); |
| 1102 | sched_set_fifo_low(usb->status_worker.task); |
| 1103 | |
| 1104 | return 0; |
| 1105 | } |
| 1106 | EXPORT_SYMBOL_GPL(__mt76u_init); |
| 1107 | |
| 1108 | int mt76u_init(struct mt76_dev *dev, struct usb_interface *intf) |
| 1109 | { |
| 1110 | static struct mt76_bus_ops bus_ops = { |
| 1111 | .rr = mt76u_rr, |
| 1112 | .wr = mt76u_wr, |
| 1113 | .rmw = mt76u_rmw, |
| 1114 | .read_copy = mt76u_read_copy, |
| 1115 | .write_copy = mt76u_copy, |
| 1116 | .wr_rp = mt76u_wr_rp, |
| 1117 | .rd_rp = mt76u_rd_rp, |
| 1118 | .type = MT76_BUS_USB, |
| 1119 | }; |
| 1120 | |
| 1121 | return __mt76u_init(dev, intf, &bus_ops); |
| 1122 | } |
| 1123 | EXPORT_SYMBOL_GPL(mt76u_init); |
| 1124 | |
| 1125 | MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>"); |
| 1126 | MODULE_LICENSE("Dual BSD/GPL"); |