1 /* 2 * Keystone NetCP Core driver 3 * 4 * Copyright (C) 2014 Texas Instruments Incorporated 5 * Authors: Sandeep Nair <sandeep_n@ti.com> 6 * Sandeep Paulraj <s-paulraj@ti.com> 7 * Cyril Chemparathy <cyril@ti.com> 8 * Santosh Shilimkar <santosh.shilimkar@ti.com> 9 * Murali Karicheri <m-karicheri2@ti.com> 10 * Wingman Kwok <w-kwok2@ti.com> 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License as 14 * published by the Free Software Foundation version 2. 15 * 16 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 17 * kind, whether express or implied; without even the implied warranty 18 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 */ 21 22 #include <linux/io.h> 23 #include <linux/module.h> 24 #include <linux/of_net.h> 25 #include <linux/of_address.h> 26 #include <linux/if_vlan.h> 27 #include <linux/pm_runtime.h> 28 #include <linux/platform_device.h> 29 #include <linux/soc/ti/knav_qmss.h> 30 #include <linux/soc/ti/knav_dma.h> 31 32 #include "netcp.h" 33 34 #define NETCP_SOP_OFFSET (NET_IP_ALIGN + NET_SKB_PAD) 35 #define NETCP_NAPI_WEIGHT 64 36 #define NETCP_TX_TIMEOUT (5 * HZ) 37 #define NETCP_PACKET_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN) 38 #define NETCP_MIN_PACKET_SIZE ETH_ZLEN 39 #define NETCP_MAX_MCAST_ADDR 16 40 41 #define NETCP_EFUSE_REG_INDEX 0 42 43 #define NETCP_MOD_PROBE_SKIPPED 1 44 #define NETCP_MOD_PROBE_FAILED 2 45 46 #define NETCP_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \ 47 NETIF_MSG_DRV | NETIF_MSG_LINK | \ 48 NETIF_MSG_IFUP | NETIF_MSG_INTR | \ 49 NETIF_MSG_PROBE | NETIF_MSG_TIMER | \ 50 NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \ 51 NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \ 52 NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \ 53 NETIF_MSG_RX_STATUS) 54 55 #define NETCP_EFUSE_ADDR_SWAP 2 56 57 #define knav_queue_get_id(q) knav_queue_device_control(q, \ 58 KNAV_QUEUE_GET_ID, (unsigned long)NULL) 59 60 #define knav_queue_enable_notify(q) knav_queue_device_control(q, \ 61 KNAV_QUEUE_ENABLE_NOTIFY, \ 62 (unsigned long)NULL) 63 64 #define knav_queue_disable_notify(q) knav_queue_device_control(q, \ 65 KNAV_QUEUE_DISABLE_NOTIFY, \ 66 (unsigned long)NULL) 67 68 #define knav_queue_get_count(q) knav_queue_device_control(q, \ 69 KNAV_QUEUE_GET_COUNT, (unsigned long)NULL) 70 71 #define for_each_netcp_module(module) \ 72 list_for_each_entry(module, &netcp_modules, module_list) 73 74 #define for_each_netcp_device_module(netcp_device, inst_modpriv) \ 75 list_for_each_entry(inst_modpriv, \ 76 &((netcp_device)->modpriv_head), inst_list) 77 78 #define for_each_module(netcp, intf_modpriv) \ 79 list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list) 80 81 /* Module management structures */ 82 struct netcp_device { 83 struct list_head device_list; 84 struct list_head interface_head; 85 struct list_head modpriv_head; 86 struct device *device; 87 }; 88 89 struct netcp_inst_modpriv { 90 struct netcp_device *netcp_device; 91 struct netcp_module *netcp_module; 92 struct list_head inst_list; 93 void *module_priv; 94 }; 95 96 struct netcp_intf_modpriv { 97 struct netcp_intf *netcp_priv; 98 struct netcp_module *netcp_module; 99 struct list_head intf_list; 100 void *module_priv; 101 }; 102 103 struct netcp_tx_cb { 104 void *ts_context; 105 void (*txtstamp)(void *context, struct sk_buff *skb); 106 }; 107 108 static LIST_HEAD(netcp_devices); 109 static LIST_HEAD(netcp_modules); 110 static DEFINE_MUTEX(netcp_modules_lock); 111 112 static int netcp_debug_level = -1; 113 module_param(netcp_debug_level, int, 0); 114 MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)"); 115 116 /* Helper functions - Get/Set */ 117 static void get_pkt_info(dma_addr_t *buff, u32 *buff_len, dma_addr_t *ndesc, 118 struct knav_dma_desc *desc) 119 { 120 *buff_len = le32_to_cpu(desc->buff_len); 121 *buff = le32_to_cpu(desc->buff); 122 *ndesc = le32_to_cpu(desc->next_desc); 123 } 124 125 static void get_desc_info(u32 *desc_info, u32 *pkt_info, 126 struct knav_dma_desc *desc) 127 { 128 *desc_info = le32_to_cpu(desc->desc_info); 129 *pkt_info = le32_to_cpu(desc->packet_info); 130 } 131 132 static u32 get_sw_data(int index, struct knav_dma_desc *desc) 133 { 134 /* No Endian conversion needed as this data is untouched by hw */ 135 return desc->sw_data[index]; 136 } 137 138 /* use these macros to get sw data */ 139 #define GET_SW_DATA0(desc) get_sw_data(0, desc) 140 #define GET_SW_DATA1(desc) get_sw_data(1, desc) 141 #define GET_SW_DATA2(desc) get_sw_data(2, desc) 142 #define GET_SW_DATA3(desc) get_sw_data(3, desc) 143 144 static void get_org_pkt_info(dma_addr_t *buff, u32 *buff_len, 145 struct knav_dma_desc *desc) 146 { 147 *buff = le32_to_cpu(desc->orig_buff); 148 *buff_len = le32_to_cpu(desc->orig_len); 149 } 150 151 static void get_words(dma_addr_t *words, int num_words, __le32 *desc) 152 { 153 int i; 154 155 for (i = 0; i < num_words; i++) 156 words[i] = le32_to_cpu(desc[i]); 157 } 158 159 static void set_pkt_info(dma_addr_t buff, u32 buff_len, u32 ndesc, 160 struct knav_dma_desc *desc) 161 { 162 desc->buff_len = cpu_to_le32(buff_len); 163 desc->buff = cpu_to_le32(buff); 164 desc->next_desc = cpu_to_le32(ndesc); 165 } 166 167 static void set_desc_info(u32 desc_info, u32 pkt_info, 168 struct knav_dma_desc *desc) 169 { 170 desc->desc_info = cpu_to_le32(desc_info); 171 desc->packet_info = cpu_to_le32(pkt_info); 172 } 173 174 static void set_sw_data(int index, u32 data, struct knav_dma_desc *desc) 175 { 176 /* No Endian conversion needed as this data is untouched by hw */ 177 desc->sw_data[index] = data; 178 } 179 180 /* use these macros to set sw data */ 181 #define SET_SW_DATA0(data, desc) set_sw_data(0, data, desc) 182 #define SET_SW_DATA1(data, desc) set_sw_data(1, data, desc) 183 #define SET_SW_DATA2(data, desc) set_sw_data(2, data, desc) 184 #define SET_SW_DATA3(data, desc) set_sw_data(3, data, desc) 185 186 static void set_org_pkt_info(dma_addr_t buff, u32 buff_len, 187 struct knav_dma_desc *desc) 188 { 189 desc->orig_buff = cpu_to_le32(buff); 190 desc->orig_len = cpu_to_le32(buff_len); 191 } 192 193 static void set_words(u32 *words, int num_words, __le32 *desc) 194 { 195 int i; 196 197 for (i = 0; i < num_words; i++) 198 desc[i] = cpu_to_le32(words[i]); 199 } 200 201 /* Read the e-fuse value as 32 bit values to be endian independent */ 202 static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac, u32 swap) 203 { 204 unsigned int addr0, addr1; 205 206 addr1 = readl(efuse_mac + 4); 207 addr0 = readl(efuse_mac); 208 209 switch (swap) { 210 case NETCP_EFUSE_ADDR_SWAP: 211 addr0 = addr1; 212 addr1 = readl(efuse_mac); 213 break; 214 default: 215 break; 216 } 217 218 x[0] = (addr1 & 0x0000ff00) >> 8; 219 x[1] = addr1 & 0x000000ff; 220 x[2] = (addr0 & 0xff000000) >> 24; 221 x[3] = (addr0 & 0x00ff0000) >> 16; 222 x[4] = (addr0 & 0x0000ff00) >> 8; 223 x[5] = addr0 & 0x000000ff; 224 225 return 0; 226 } 227 228 static const char *netcp_node_name(struct device_node *node) 229 { 230 const char *name; 231 232 if (of_property_read_string(node, "label", &name) < 0) 233 name = node->name; 234 if (!name) 235 name = "unknown"; 236 return name; 237 } 238 239 /* Module management routines */ 240 static int netcp_register_interface(struct netcp_intf *netcp) 241 { 242 int ret; 243 244 ret = register_netdev(netcp->ndev); 245 if (!ret) 246 netcp->netdev_registered = true; 247 return ret; 248 } 249 250 static int netcp_module_probe(struct netcp_device *netcp_device, 251 struct netcp_module *module) 252 { 253 struct device *dev = netcp_device->device; 254 struct device_node *devices, *interface, *node = dev->of_node; 255 struct device_node *child; 256 struct netcp_inst_modpriv *inst_modpriv; 257 struct netcp_intf *netcp_intf; 258 struct netcp_module *tmp; 259 bool primary_module_registered = false; 260 int ret; 261 262 /* Find this module in the sub-tree for this device */ 263 devices = of_get_child_by_name(node, "netcp-devices"); 264 if (!devices) { 265 dev_err(dev, "could not find netcp-devices node\n"); 266 return NETCP_MOD_PROBE_SKIPPED; 267 } 268 269 for_each_available_child_of_node(devices, child) { 270 const char *name = netcp_node_name(child); 271 272 if (!strcasecmp(module->name, name)) 273 break; 274 } 275 276 of_node_put(devices); 277 /* If module not used for this device, skip it */ 278 if (!child) { 279 dev_warn(dev, "module(%s) not used for device\n", module->name); 280 return NETCP_MOD_PROBE_SKIPPED; 281 } 282 283 inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL); 284 if (!inst_modpriv) { 285 of_node_put(child); 286 return -ENOMEM; 287 } 288 289 inst_modpriv->netcp_device = netcp_device; 290 inst_modpriv->netcp_module = module; 291 list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head); 292 293 ret = module->probe(netcp_device, dev, child, 294 &inst_modpriv->module_priv); 295 of_node_put(child); 296 if (ret) { 297 dev_err(dev, "Probe of module(%s) failed with %d\n", 298 module->name, ret); 299 list_del(&inst_modpriv->inst_list); 300 devm_kfree(dev, inst_modpriv); 301 return NETCP_MOD_PROBE_FAILED; 302 } 303 304 /* Attach modules only if the primary module is probed */ 305 for_each_netcp_module(tmp) { 306 if (tmp->primary) 307 primary_module_registered = true; 308 } 309 310 if (!primary_module_registered) 311 return 0; 312 313 /* Attach module to interfaces */ 314 list_for_each_entry(netcp_intf, &netcp_device->interface_head, 315 interface_list) { 316 struct netcp_intf_modpriv *intf_modpriv; 317 318 intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv), 319 GFP_KERNEL); 320 if (!intf_modpriv) 321 return -ENOMEM; 322 323 interface = of_parse_phandle(netcp_intf->node_interface, 324 module->name, 0); 325 326 if (!interface) { 327 devm_kfree(dev, intf_modpriv); 328 continue; 329 } 330 331 intf_modpriv->netcp_priv = netcp_intf; 332 intf_modpriv->netcp_module = module; 333 list_add_tail(&intf_modpriv->intf_list, 334 &netcp_intf->module_head); 335 336 ret = module->attach(inst_modpriv->module_priv, 337 netcp_intf->ndev, interface, 338 &intf_modpriv->module_priv); 339 of_node_put(interface); 340 if (ret) { 341 dev_dbg(dev, "Attach of module %s declined with %d\n", 342 module->name, ret); 343 list_del(&intf_modpriv->intf_list); 344 devm_kfree(dev, intf_modpriv); 345 continue; 346 } 347 } 348 349 /* Now register the interface with netdev */ 350 list_for_each_entry(netcp_intf, 351 &netcp_device->interface_head, 352 interface_list) { 353 /* If interface not registered then register now */ 354 if (!netcp_intf->netdev_registered) { 355 ret = netcp_register_interface(netcp_intf); 356 if (ret) 357 return -ENODEV; 358 } 359 } 360 return 0; 361 } 362 363 int netcp_register_module(struct netcp_module *module) 364 { 365 struct netcp_device *netcp_device; 366 struct netcp_module *tmp; 367 int ret; 368 369 if (!module->name) { 370 WARN(1, "error registering netcp module: no name\n"); 371 return -EINVAL; 372 } 373 374 if (!module->probe) { 375 WARN(1, "error registering netcp module: no probe\n"); 376 return -EINVAL; 377 } 378 379 mutex_lock(&netcp_modules_lock); 380 381 for_each_netcp_module(tmp) { 382 if (!strcasecmp(tmp->name, module->name)) { 383 mutex_unlock(&netcp_modules_lock); 384 return -EEXIST; 385 } 386 } 387 list_add_tail(&module->module_list, &netcp_modules); 388 389 list_for_each_entry(netcp_device, &netcp_devices, device_list) { 390 ret = netcp_module_probe(netcp_device, module); 391 if (ret < 0) 392 goto fail; 393 } 394 mutex_unlock(&netcp_modules_lock); 395 return 0; 396 397 fail: 398 mutex_unlock(&netcp_modules_lock); 399 netcp_unregister_module(module); 400 return ret; 401 } 402 EXPORT_SYMBOL_GPL(netcp_register_module); 403 404 static void netcp_release_module(struct netcp_device *netcp_device, 405 struct netcp_module *module) 406 { 407 struct netcp_inst_modpriv *inst_modpriv, *inst_tmp; 408 struct netcp_intf *netcp_intf, *netcp_tmp; 409 struct device *dev = netcp_device->device; 410 411 /* Release the module from each interface */ 412 list_for_each_entry_safe(netcp_intf, netcp_tmp, 413 &netcp_device->interface_head, 414 interface_list) { 415 struct netcp_intf_modpriv *intf_modpriv, *intf_tmp; 416 417 list_for_each_entry_safe(intf_modpriv, intf_tmp, 418 &netcp_intf->module_head, 419 intf_list) { 420 if (intf_modpriv->netcp_module == module) { 421 module->release(intf_modpriv->module_priv); 422 list_del(&intf_modpriv->intf_list); 423 devm_kfree(dev, intf_modpriv); 424 break; 425 } 426 } 427 } 428 429 /* Remove the module from each instance */ 430 list_for_each_entry_safe(inst_modpriv, inst_tmp, 431 &netcp_device->modpriv_head, inst_list) { 432 if (inst_modpriv->netcp_module == module) { 433 module->remove(netcp_device, 434 inst_modpriv->module_priv); 435 list_del(&inst_modpriv->inst_list); 436 devm_kfree(dev, inst_modpriv); 437 break; 438 } 439 } 440 } 441 442 void netcp_unregister_module(struct netcp_module *module) 443 { 444 struct netcp_device *netcp_device; 445 struct netcp_module *module_tmp; 446 447 mutex_lock(&netcp_modules_lock); 448 449 list_for_each_entry(netcp_device, &netcp_devices, device_list) { 450 netcp_release_module(netcp_device, module); 451 } 452 453 /* Remove the module from the module list */ 454 for_each_netcp_module(module_tmp) { 455 if (module == module_tmp) { 456 list_del(&module->module_list); 457 break; 458 } 459 } 460 461 mutex_unlock(&netcp_modules_lock); 462 } 463 EXPORT_SYMBOL_GPL(netcp_unregister_module); 464 465 void *netcp_module_get_intf_data(struct netcp_module *module, 466 struct netcp_intf *intf) 467 { 468 struct netcp_intf_modpriv *intf_modpriv; 469 470 list_for_each_entry(intf_modpriv, &intf->module_head, intf_list) 471 if (intf_modpriv->netcp_module == module) 472 return intf_modpriv->module_priv; 473 return NULL; 474 } 475 EXPORT_SYMBOL_GPL(netcp_module_get_intf_data); 476 477 /* Module TX and RX Hook management */ 478 struct netcp_hook_list { 479 struct list_head list; 480 netcp_hook_rtn *hook_rtn; 481 void *hook_data; 482 int order; 483 }; 484 485 int netcp_register_txhook(struct netcp_intf *netcp_priv, int order, 486 netcp_hook_rtn *hook_rtn, void *hook_data) 487 { 488 struct netcp_hook_list *entry; 489 struct netcp_hook_list *next; 490 unsigned long flags; 491 492 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL); 493 if (!entry) 494 return -ENOMEM; 495 496 entry->hook_rtn = hook_rtn; 497 entry->hook_data = hook_data; 498 entry->order = order; 499 500 spin_lock_irqsave(&netcp_priv->lock, flags); 501 list_for_each_entry(next, &netcp_priv->txhook_list_head, list) { 502 if (next->order > order) 503 break; 504 } 505 __list_add(&entry->list, next->list.prev, &next->list); 506 spin_unlock_irqrestore(&netcp_priv->lock, flags); 507 508 return 0; 509 } 510 EXPORT_SYMBOL_GPL(netcp_register_txhook); 511 512 int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order, 513 netcp_hook_rtn *hook_rtn, void *hook_data) 514 { 515 struct netcp_hook_list *next, *n; 516 unsigned long flags; 517 518 spin_lock_irqsave(&netcp_priv->lock, flags); 519 list_for_each_entry_safe(next, n, &netcp_priv->txhook_list_head, list) { 520 if ((next->order == order) && 521 (next->hook_rtn == hook_rtn) && 522 (next->hook_data == hook_data)) { 523 list_del(&next->list); 524 spin_unlock_irqrestore(&netcp_priv->lock, flags); 525 devm_kfree(netcp_priv->dev, next); 526 return 0; 527 } 528 } 529 spin_unlock_irqrestore(&netcp_priv->lock, flags); 530 return -ENOENT; 531 } 532 EXPORT_SYMBOL_GPL(netcp_unregister_txhook); 533 534 int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order, 535 netcp_hook_rtn *hook_rtn, void *hook_data) 536 { 537 struct netcp_hook_list *entry; 538 struct netcp_hook_list *next; 539 unsigned long flags; 540 541 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL); 542 if (!entry) 543 return -ENOMEM; 544 545 entry->hook_rtn = hook_rtn; 546 entry->hook_data = hook_data; 547 entry->order = order; 548 549 spin_lock_irqsave(&netcp_priv->lock, flags); 550 list_for_each_entry(next, &netcp_priv->rxhook_list_head, list) { 551 if (next->order > order) 552 break; 553 } 554 __list_add(&entry->list, next->list.prev, &next->list); 555 spin_unlock_irqrestore(&netcp_priv->lock, flags); 556 557 return 0; 558 } 559 EXPORT_SYMBOL_GPL(netcp_register_rxhook); 560 561 int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order, 562 netcp_hook_rtn *hook_rtn, void *hook_data) 563 { 564 struct netcp_hook_list *next, *n; 565 unsigned long flags; 566 567 spin_lock_irqsave(&netcp_priv->lock, flags); 568 list_for_each_entry_safe(next, n, &netcp_priv->rxhook_list_head, list) { 569 if ((next->order == order) && 570 (next->hook_rtn == hook_rtn) && 571 (next->hook_data == hook_data)) { 572 list_del(&next->list); 573 spin_unlock_irqrestore(&netcp_priv->lock, flags); 574 devm_kfree(netcp_priv->dev, next); 575 return 0; 576 } 577 } 578 spin_unlock_irqrestore(&netcp_priv->lock, flags); 579 580 return -ENOENT; 581 } 582 EXPORT_SYMBOL_GPL(netcp_unregister_rxhook); 583 584 static void netcp_frag_free(bool is_frag, void *ptr) 585 { 586 if (is_frag) 587 skb_free_frag(ptr); 588 else 589 kfree(ptr); 590 } 591 592 static void netcp_free_rx_desc_chain(struct netcp_intf *netcp, 593 struct knav_dma_desc *desc) 594 { 595 struct knav_dma_desc *ndesc; 596 dma_addr_t dma_desc, dma_buf; 597 unsigned int buf_len, dma_sz = sizeof(*ndesc); 598 void *buf_ptr; 599 u32 tmp; 600 601 get_words(&dma_desc, 1, &desc->next_desc); 602 603 while (dma_desc) { 604 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz); 605 if (unlikely(!ndesc)) { 606 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); 607 break; 608 } 609 get_pkt_info(&dma_buf, &tmp, &dma_desc, ndesc); 610 /* warning!!!! We are retrieving the virtual ptr in the sw_data 611 * field as a 32bit value. Will not work on 64bit machines 612 */ 613 buf_ptr = (void *)GET_SW_DATA0(ndesc); 614 buf_len = (int)GET_SW_DATA1(desc); 615 dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE); 616 __free_page(buf_ptr); 617 knav_pool_desc_put(netcp->rx_pool, desc); 618 } 619 /* warning!!!! We are retrieving the virtual ptr in the sw_data 620 * field as a 32bit value. Will not work on 64bit machines 621 */ 622 buf_ptr = (void *)GET_SW_DATA0(desc); 623 buf_len = (int)GET_SW_DATA1(desc); 624 625 if (buf_ptr) 626 netcp_frag_free(buf_len <= PAGE_SIZE, buf_ptr); 627 knav_pool_desc_put(netcp->rx_pool, desc); 628 } 629 630 static void netcp_empty_rx_queue(struct netcp_intf *netcp) 631 { 632 struct netcp_stats *rx_stats = &netcp->stats; 633 struct knav_dma_desc *desc; 634 unsigned int dma_sz; 635 dma_addr_t dma; 636 637 for (; ;) { 638 dma = knav_queue_pop(netcp->rx_queue, &dma_sz); 639 if (!dma) 640 break; 641 642 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz); 643 if (unlikely(!desc)) { 644 dev_err(netcp->ndev_dev, "%s: failed to unmap Rx desc\n", 645 __func__); 646 rx_stats->rx_errors++; 647 continue; 648 } 649 netcp_free_rx_desc_chain(netcp, desc); 650 rx_stats->rx_dropped++; 651 } 652 } 653 654 static int netcp_process_one_rx_packet(struct netcp_intf *netcp) 655 { 656 struct netcp_stats *rx_stats = &netcp->stats; 657 unsigned int dma_sz, buf_len, org_buf_len; 658 struct knav_dma_desc *desc, *ndesc; 659 unsigned int pkt_sz = 0, accum_sz; 660 struct netcp_hook_list *rx_hook; 661 dma_addr_t dma_desc, dma_buff; 662 struct netcp_packet p_info; 663 struct sk_buff *skb; 664 void *org_buf_ptr; 665 u32 tmp; 666 667 dma_desc = knav_queue_pop(netcp->rx_queue, &dma_sz); 668 if (!dma_desc) 669 return -1; 670 671 desc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz); 672 if (unlikely(!desc)) { 673 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); 674 return 0; 675 } 676 677 get_pkt_info(&dma_buff, &buf_len, &dma_desc, desc); 678 /* warning!!!! We are retrieving the virtual ptr in the sw_data 679 * field as a 32bit value. Will not work on 64bit machines 680 */ 681 org_buf_ptr = (void *)GET_SW_DATA0(desc); 682 org_buf_len = (int)GET_SW_DATA1(desc); 683 684 if (unlikely(!org_buf_ptr)) { 685 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n"); 686 goto free_desc; 687 } 688 689 pkt_sz &= KNAV_DMA_DESC_PKT_LEN_MASK; 690 accum_sz = buf_len; 691 dma_unmap_single(netcp->dev, dma_buff, buf_len, DMA_FROM_DEVICE); 692 693 /* Build a new sk_buff for the primary buffer */ 694 skb = build_skb(org_buf_ptr, org_buf_len); 695 if (unlikely(!skb)) { 696 dev_err(netcp->ndev_dev, "build_skb() failed\n"); 697 goto free_desc; 698 } 699 700 /* update data, tail and len */ 701 skb_reserve(skb, NETCP_SOP_OFFSET); 702 __skb_put(skb, buf_len); 703 704 /* Fill in the page fragment list */ 705 while (dma_desc) { 706 struct page *page; 707 708 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz); 709 if (unlikely(!ndesc)) { 710 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); 711 goto free_desc; 712 } 713 714 get_pkt_info(&dma_buff, &buf_len, &dma_desc, ndesc); 715 /* warning!!!! We are retrieving the virtual ptr in the sw_data 716 * field as a 32bit value. Will not work on 64bit machines 717 */ 718 page = (struct page *)GET_SW_DATA0(desc); 719 720 if (likely(dma_buff && buf_len && page)) { 721 dma_unmap_page(netcp->dev, dma_buff, PAGE_SIZE, 722 DMA_FROM_DEVICE); 723 } else { 724 dev_err(netcp->ndev_dev, "Bad Rx desc dma_buff(%pad), len(%d), page(%p)\n", 725 &dma_buff, buf_len, page); 726 goto free_desc; 727 } 728 729 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, 730 offset_in_page(dma_buff), buf_len, PAGE_SIZE); 731 accum_sz += buf_len; 732 733 /* Free the descriptor */ 734 knav_pool_desc_put(netcp->rx_pool, ndesc); 735 } 736 737 /* check for packet len and warn */ 738 if (unlikely(pkt_sz != accum_sz)) 739 dev_dbg(netcp->ndev_dev, "mismatch in packet size(%d) & sum of fragments(%d)\n", 740 pkt_sz, accum_sz); 741 742 /* Newer version of the Ethernet switch can trim the Ethernet FCS 743 * from the packet and is indicated in hw_cap. So trim it only for 744 * older h/w 745 */ 746 if (!(netcp->hw_cap & ETH_SW_CAN_REMOVE_ETH_FCS)) 747 __pskb_trim(skb, skb->len - ETH_FCS_LEN); 748 749 /* Call each of the RX hooks */ 750 p_info.skb = skb; 751 skb->dev = netcp->ndev; 752 p_info.rxtstamp_complete = false; 753 get_desc_info(&tmp, &p_info.eflags, desc); 754 p_info.epib = desc->epib; 755 p_info.psdata = (u32 __force *)desc->psdata; 756 p_info.eflags = ((p_info.eflags >> KNAV_DMA_DESC_EFLAGS_SHIFT) & 757 KNAV_DMA_DESC_EFLAGS_MASK); 758 list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) { 759 int ret; 760 761 ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data, 762 &p_info); 763 if (unlikely(ret)) { 764 dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n", 765 rx_hook->order, ret); 766 /* Free the primary descriptor */ 767 rx_stats->rx_dropped++; 768 knav_pool_desc_put(netcp->rx_pool, desc); 769 dev_kfree_skb(skb); 770 return 0; 771 } 772 } 773 /* Free the primary descriptor */ 774 knav_pool_desc_put(netcp->rx_pool, desc); 775 776 u64_stats_update_begin(&rx_stats->syncp_rx); 777 rx_stats->rx_packets++; 778 rx_stats->rx_bytes += skb->len; 779 u64_stats_update_end(&rx_stats->syncp_rx); 780 781 /* push skb up the stack */ 782 skb->protocol = eth_type_trans(skb, netcp->ndev); 783 netif_receive_skb(skb); 784 return 0; 785 786 free_desc: 787 netcp_free_rx_desc_chain(netcp, desc); 788 rx_stats->rx_errors++; 789 return 0; 790 } 791 792 static int netcp_process_rx_packets(struct netcp_intf *netcp, 793 unsigned int budget) 794 { 795 int i; 796 797 for (i = 0; (i < budget) && !netcp_process_one_rx_packet(netcp); i++) 798 ; 799 return i; 800 } 801 802 /* Release descriptors and attached buffers from Rx FDQ */ 803 static void netcp_free_rx_buf(struct netcp_intf *netcp, int fdq) 804 { 805 struct knav_dma_desc *desc; 806 unsigned int buf_len, dma_sz; 807 dma_addr_t dma; 808 void *buf_ptr; 809 810 /* Allocate descriptor */ 811 while ((dma = knav_queue_pop(netcp->rx_fdq[fdq], &dma_sz))) { 812 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz); 813 if (unlikely(!desc)) { 814 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); 815 continue; 816 } 817 818 get_org_pkt_info(&dma, &buf_len, desc); 819 /* warning!!!! We are retrieving the virtual ptr in the sw_data 820 * field as a 32bit value. Will not work on 64bit machines 821 */ 822 buf_ptr = (void *)GET_SW_DATA0(desc); 823 824 if (unlikely(!dma)) { 825 dev_err(netcp->ndev_dev, "NULL orig_buff in desc\n"); 826 knav_pool_desc_put(netcp->rx_pool, desc); 827 continue; 828 } 829 830 if (unlikely(!buf_ptr)) { 831 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n"); 832 knav_pool_desc_put(netcp->rx_pool, desc); 833 continue; 834 } 835 836 if (fdq == 0) { 837 dma_unmap_single(netcp->dev, dma, buf_len, 838 DMA_FROM_DEVICE); 839 netcp_frag_free((buf_len <= PAGE_SIZE), buf_ptr); 840 } else { 841 dma_unmap_page(netcp->dev, dma, buf_len, 842 DMA_FROM_DEVICE); 843 __free_page(buf_ptr); 844 } 845 846 knav_pool_desc_put(netcp->rx_pool, desc); 847 } 848 } 849 850 static void netcp_rxpool_free(struct netcp_intf *netcp) 851 { 852 int i; 853 854 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && 855 !IS_ERR_OR_NULL(netcp->rx_fdq[i]); i++) 856 netcp_free_rx_buf(netcp, i); 857 858 if (knav_pool_count(netcp->rx_pool) != netcp->rx_pool_size) 859 dev_err(netcp->ndev_dev, "Lost Rx (%d) descriptors\n", 860 netcp->rx_pool_size - knav_pool_count(netcp->rx_pool)); 861 862 knav_pool_destroy(netcp->rx_pool); 863 netcp->rx_pool = NULL; 864 } 865 866 static int netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq) 867 { 868 struct knav_dma_desc *hwdesc; 869 unsigned int buf_len, dma_sz; 870 u32 desc_info, pkt_info; 871 struct page *page; 872 dma_addr_t dma; 873 void *bufptr; 874 u32 sw_data[2]; 875 876 /* Allocate descriptor */ 877 hwdesc = knav_pool_desc_get(netcp->rx_pool); 878 if (IS_ERR_OR_NULL(hwdesc)) { 879 dev_dbg(netcp->ndev_dev, "out of rx pool desc\n"); 880 return -ENOMEM; 881 } 882 883 if (likely(fdq == 0)) { 884 unsigned int primary_buf_len; 885 /* Allocate a primary receive queue entry */ 886 buf_len = NETCP_PACKET_SIZE + NETCP_SOP_OFFSET; 887 primary_buf_len = SKB_DATA_ALIGN(buf_len) + 888 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 889 890 bufptr = netdev_alloc_frag(primary_buf_len); 891 sw_data[1] = primary_buf_len; 892 893 if (unlikely(!bufptr)) { 894 dev_warn_ratelimited(netcp->ndev_dev, 895 "Primary RX buffer alloc failed\n"); 896 goto fail; 897 } 898 dma = dma_map_single(netcp->dev, bufptr, buf_len, 899 DMA_TO_DEVICE); 900 if (unlikely(dma_mapping_error(netcp->dev, dma))) 901 goto fail; 902 903 /* warning!!!! We are saving the virtual ptr in the sw_data 904 * field as a 32bit value. Will not work on 64bit machines 905 */ 906 sw_data[0] = (u32)bufptr; 907 } else { 908 /* Allocate a secondary receive queue entry */ 909 page = alloc_page(GFP_ATOMIC | GFP_DMA); 910 if (unlikely(!page)) { 911 dev_warn_ratelimited(netcp->ndev_dev, "Secondary page alloc failed\n"); 912 goto fail; 913 } 914 buf_len = PAGE_SIZE; 915 dma = dma_map_page(netcp->dev, page, 0, buf_len, DMA_TO_DEVICE); 916 /* warning!!!! We are saving the virtual ptr in the sw_data 917 * field as a 32bit value. Will not work on 64bit machines 918 */ 919 sw_data[0] = (u32)page; 920 sw_data[1] = 0; 921 } 922 923 desc_info = KNAV_DMA_DESC_PS_INFO_IN_DESC; 924 desc_info |= buf_len & KNAV_DMA_DESC_PKT_LEN_MASK; 925 pkt_info = KNAV_DMA_DESC_HAS_EPIB; 926 pkt_info |= KNAV_DMA_NUM_PS_WORDS << KNAV_DMA_DESC_PSLEN_SHIFT; 927 pkt_info |= (netcp->rx_queue_id & KNAV_DMA_DESC_RETQ_MASK) << 928 KNAV_DMA_DESC_RETQ_SHIFT; 929 set_org_pkt_info(dma, buf_len, hwdesc); 930 SET_SW_DATA0(sw_data[0], hwdesc); 931 SET_SW_DATA1(sw_data[1], hwdesc); 932 set_desc_info(desc_info, pkt_info, hwdesc); 933 934 /* Push to FDQs */ 935 knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma, 936 &dma_sz); 937 knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0); 938 return 0; 939 940 fail: 941 knav_pool_desc_put(netcp->rx_pool, hwdesc); 942 return -ENOMEM; 943 } 944 945 /* Refill Rx FDQ with descriptors & attached buffers */ 946 static void netcp_rxpool_refill(struct netcp_intf *netcp) 947 { 948 u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0}; 949 int i, ret = 0; 950 951 /* Calculate the FDQ deficit and refill */ 952 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) { 953 fdq_deficit[i] = netcp->rx_queue_depths[i] - 954 knav_queue_get_count(netcp->rx_fdq[i]); 955 956 while (fdq_deficit[i]-- && !ret) 957 ret = netcp_allocate_rx_buf(netcp, i); 958 } /* end for fdqs */ 959 } 960 961 /* NAPI poll */ 962 static int netcp_rx_poll(struct napi_struct *napi, int budget) 963 { 964 struct netcp_intf *netcp = container_of(napi, struct netcp_intf, 965 rx_napi); 966 unsigned int packets; 967 968 packets = netcp_process_rx_packets(netcp, budget); 969 970 netcp_rxpool_refill(netcp); 971 if (packets < budget) { 972 napi_complete_done(&netcp->rx_napi, packets); 973 knav_queue_enable_notify(netcp->rx_queue); 974 } 975 976 return packets; 977 } 978 979 static void netcp_rx_notify(void *arg) 980 { 981 struct netcp_intf *netcp = arg; 982 983 knav_queue_disable_notify(netcp->rx_queue); 984 napi_schedule(&netcp->rx_napi); 985 } 986 987 static void netcp_free_tx_desc_chain(struct netcp_intf *netcp, 988 struct knav_dma_desc *desc, 989 unsigned int desc_sz) 990 { 991 struct knav_dma_desc *ndesc = desc; 992 dma_addr_t dma_desc, dma_buf; 993 unsigned int buf_len; 994 995 while (ndesc) { 996 get_pkt_info(&dma_buf, &buf_len, &dma_desc, ndesc); 997 998 if (dma_buf && buf_len) 999 dma_unmap_single(netcp->dev, dma_buf, buf_len, 1000 DMA_TO_DEVICE); 1001 else 1002 dev_warn(netcp->ndev_dev, "bad Tx desc buf(%pad), len(%d)\n", 1003 &dma_buf, buf_len); 1004 1005 knav_pool_desc_put(netcp->tx_pool, ndesc); 1006 ndesc = NULL; 1007 if (dma_desc) { 1008 ndesc = knav_pool_desc_unmap(netcp->tx_pool, dma_desc, 1009 desc_sz); 1010 if (!ndesc) 1011 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n"); 1012 } 1013 } 1014 } 1015 1016 static int netcp_process_tx_compl_packets(struct netcp_intf *netcp, 1017 unsigned int budget) 1018 { 1019 struct netcp_stats *tx_stats = &netcp->stats; 1020 struct knav_dma_desc *desc; 1021 struct netcp_tx_cb *tx_cb; 1022 struct sk_buff *skb; 1023 unsigned int dma_sz; 1024 dma_addr_t dma; 1025 int pkts = 0; 1026 1027 while (budget--) { 1028 dma = knav_queue_pop(netcp->tx_compl_q, &dma_sz); 1029 if (!dma) 1030 break; 1031 desc = knav_pool_desc_unmap(netcp->tx_pool, dma, dma_sz); 1032 if (unlikely(!desc)) { 1033 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n"); 1034 tx_stats->tx_errors++; 1035 continue; 1036 } 1037 1038 /* warning!!!! We are retrieving the virtual ptr in the sw_data 1039 * field as a 32bit value. Will not work on 64bit machines 1040 */ 1041 skb = (struct sk_buff *)GET_SW_DATA0(desc); 1042 netcp_free_tx_desc_chain(netcp, desc, dma_sz); 1043 if (!skb) { 1044 dev_err(netcp->ndev_dev, "No skb in Tx desc\n"); 1045 tx_stats->tx_errors++; 1046 continue; 1047 } 1048 1049 tx_cb = (struct netcp_tx_cb *)skb->cb; 1050 if (tx_cb->txtstamp) 1051 tx_cb->txtstamp(tx_cb->ts_context, skb); 1052 1053 if (netif_subqueue_stopped(netcp->ndev, skb) && 1054 netif_running(netcp->ndev) && 1055 (knav_pool_count(netcp->tx_pool) > 1056 netcp->tx_resume_threshold)) { 1057 u16 subqueue = skb_get_queue_mapping(skb); 1058 1059 netif_wake_subqueue(netcp->ndev, subqueue); 1060 } 1061 1062 u64_stats_update_begin(&tx_stats->syncp_tx); 1063 tx_stats->tx_packets++; 1064 tx_stats->tx_bytes += skb->len; 1065 u64_stats_update_end(&tx_stats->syncp_tx); 1066 dev_kfree_skb(skb); 1067 pkts++; 1068 } 1069 return pkts; 1070 } 1071 1072 static int netcp_tx_poll(struct napi_struct *napi, int budget) 1073 { 1074 int packets; 1075 struct netcp_intf *netcp = container_of(napi, struct netcp_intf, 1076 tx_napi); 1077 1078 packets = netcp_process_tx_compl_packets(netcp, budget); 1079 if (packets < budget) { 1080 napi_complete(&netcp->tx_napi); 1081 knav_queue_enable_notify(netcp->tx_compl_q); 1082 } 1083 1084 return packets; 1085 } 1086 1087 static void netcp_tx_notify(void *arg) 1088 { 1089 struct netcp_intf *netcp = arg; 1090 1091 knav_queue_disable_notify(netcp->tx_compl_q); 1092 napi_schedule(&netcp->tx_napi); 1093 } 1094 1095 static struct knav_dma_desc* 1096 netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp) 1097 { 1098 struct knav_dma_desc *desc, *ndesc, *pdesc; 1099 unsigned int pkt_len = skb_headlen(skb); 1100 struct device *dev = netcp->dev; 1101 dma_addr_t dma_addr; 1102 unsigned int dma_sz; 1103 int i; 1104 1105 /* Map the linear buffer */ 1106 dma_addr = dma_map_single(dev, skb->data, pkt_len, DMA_TO_DEVICE); 1107 if (unlikely(dma_mapping_error(dev, dma_addr))) { 1108 dev_err(netcp->ndev_dev, "Failed to map skb buffer\n"); 1109 return NULL; 1110 } 1111 1112 desc = knav_pool_desc_get(netcp->tx_pool); 1113 if (IS_ERR_OR_NULL(desc)) { 1114 dev_err(netcp->ndev_dev, "out of TX desc\n"); 1115 dma_unmap_single(dev, dma_addr, pkt_len, DMA_TO_DEVICE); 1116 return NULL; 1117 } 1118 1119 set_pkt_info(dma_addr, pkt_len, 0, desc); 1120 if (skb_is_nonlinear(skb)) { 1121 prefetchw(skb_shinfo(skb)); 1122 } else { 1123 desc->next_desc = 0; 1124 goto upd_pkt_len; 1125 } 1126 1127 pdesc = desc; 1128 1129 /* Handle the case where skb is fragmented in pages */ 1130 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1131 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1132 struct page *page = skb_frag_page(frag); 1133 u32 page_offset = frag->page_offset; 1134 u32 buf_len = skb_frag_size(frag); 1135 dma_addr_t desc_dma; 1136 u32 desc_dma_32; 1137 1138 dma_addr = dma_map_page(dev, page, page_offset, buf_len, 1139 DMA_TO_DEVICE); 1140 if (unlikely(!dma_addr)) { 1141 dev_err(netcp->ndev_dev, "Failed to map skb page\n"); 1142 goto free_descs; 1143 } 1144 1145 ndesc = knav_pool_desc_get(netcp->tx_pool); 1146 if (IS_ERR_OR_NULL(ndesc)) { 1147 dev_err(netcp->ndev_dev, "out of TX desc for frags\n"); 1148 dma_unmap_page(dev, dma_addr, buf_len, DMA_TO_DEVICE); 1149 goto free_descs; 1150 } 1151 1152 desc_dma = knav_pool_desc_virt_to_dma(netcp->tx_pool, ndesc); 1153 set_pkt_info(dma_addr, buf_len, 0, ndesc); 1154 desc_dma_32 = (u32)desc_dma; 1155 set_words(&desc_dma_32, 1, &pdesc->next_desc); 1156 pkt_len += buf_len; 1157 if (pdesc != desc) 1158 knav_pool_desc_map(netcp->tx_pool, pdesc, 1159 sizeof(*pdesc), &desc_dma, &dma_sz); 1160 pdesc = ndesc; 1161 } 1162 if (pdesc != desc) 1163 knav_pool_desc_map(netcp->tx_pool, pdesc, sizeof(*pdesc), 1164 &dma_addr, &dma_sz); 1165 1166 /* frag list based linkage is not supported for now. */ 1167 if (skb_shinfo(skb)->frag_list) { 1168 dev_err_ratelimited(netcp->ndev_dev, "NETIF_F_FRAGLIST not supported\n"); 1169 goto free_descs; 1170 } 1171 1172 upd_pkt_len: 1173 WARN_ON(pkt_len != skb->len); 1174 1175 pkt_len &= KNAV_DMA_DESC_PKT_LEN_MASK; 1176 set_words(&pkt_len, 1, &desc->desc_info); 1177 return desc; 1178 1179 free_descs: 1180 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc)); 1181 return NULL; 1182 } 1183 1184 static int netcp_tx_submit_skb(struct netcp_intf *netcp, 1185 struct sk_buff *skb, 1186 struct knav_dma_desc *desc) 1187 { 1188 struct netcp_tx_pipe *tx_pipe = NULL; 1189 struct netcp_hook_list *tx_hook; 1190 struct netcp_packet p_info; 1191 struct netcp_tx_cb *tx_cb; 1192 unsigned int dma_sz; 1193 dma_addr_t dma; 1194 u32 tmp = 0; 1195 int ret = 0; 1196 1197 p_info.netcp = netcp; 1198 p_info.skb = skb; 1199 p_info.tx_pipe = NULL; 1200 p_info.psdata_len = 0; 1201 p_info.ts_context = NULL; 1202 p_info.txtstamp = NULL; 1203 p_info.epib = desc->epib; 1204 p_info.psdata = (u32 __force *)desc->psdata; 1205 memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(__le32)); 1206 1207 /* Find out where to inject the packet for transmission */ 1208 list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) { 1209 ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data, 1210 &p_info); 1211 if (unlikely(ret != 0)) { 1212 dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n", 1213 tx_hook->order, ret); 1214 ret = (ret < 0) ? ret : NETDEV_TX_OK; 1215 goto out; 1216 } 1217 } 1218 1219 /* Make sure some TX hook claimed the packet */ 1220 tx_pipe = p_info.tx_pipe; 1221 if (!tx_pipe) { 1222 dev_err(netcp->ndev_dev, "No TX hook claimed the packet!\n"); 1223 ret = -ENXIO; 1224 goto out; 1225 } 1226 1227 tx_cb = (struct netcp_tx_cb *)skb->cb; 1228 tx_cb->ts_context = p_info.ts_context; 1229 tx_cb->txtstamp = p_info.txtstamp; 1230 1231 /* update descriptor */ 1232 if (p_info.psdata_len) { 1233 /* psdata points to both native-endian and device-endian data */ 1234 __le32 *psdata = (void __force *)p_info.psdata; 1235 1236 set_words((u32 *)psdata + 1237 (KNAV_DMA_NUM_PS_WORDS - p_info.psdata_len), 1238 p_info.psdata_len, psdata); 1239 tmp |= (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) << 1240 KNAV_DMA_DESC_PSLEN_SHIFT; 1241 } 1242 1243 tmp |= KNAV_DMA_DESC_HAS_EPIB | 1244 ((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) << 1245 KNAV_DMA_DESC_RETQ_SHIFT); 1246 1247 if (!(tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO)) { 1248 tmp |= ((tx_pipe->switch_to_port & KNAV_DMA_DESC_PSFLAG_MASK) << 1249 KNAV_DMA_DESC_PSFLAG_SHIFT); 1250 } 1251 1252 set_words(&tmp, 1, &desc->packet_info); 1253 /* warning!!!! We are saving the virtual ptr in the sw_data 1254 * field as a 32bit value. Will not work on 64bit machines 1255 */ 1256 SET_SW_DATA0((u32)skb, desc); 1257 1258 if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) { 1259 tmp = tx_pipe->switch_to_port; 1260 set_words(&tmp, 1, &desc->tag_info); 1261 } 1262 1263 /* submit packet descriptor */ 1264 ret = knav_pool_desc_map(netcp->tx_pool, desc, sizeof(*desc), &dma, 1265 &dma_sz); 1266 if (unlikely(ret)) { 1267 dev_err(netcp->ndev_dev, "%s() failed to map desc\n", __func__); 1268 ret = -ENOMEM; 1269 goto out; 1270 } 1271 skb_tx_timestamp(skb); 1272 knav_queue_push(tx_pipe->dma_queue, dma, dma_sz, 0); 1273 1274 out: 1275 return ret; 1276 } 1277 1278 /* Submit the packet */ 1279 static int netcp_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev) 1280 { 1281 struct netcp_intf *netcp = netdev_priv(ndev); 1282 struct netcp_stats *tx_stats = &netcp->stats; 1283 int subqueue = skb_get_queue_mapping(skb); 1284 struct knav_dma_desc *desc; 1285 int desc_count, ret = 0; 1286 1287 if (unlikely(skb->len <= 0)) { 1288 dev_kfree_skb(skb); 1289 return NETDEV_TX_OK; 1290 } 1291 1292 if (unlikely(skb->len < NETCP_MIN_PACKET_SIZE)) { 1293 ret = skb_padto(skb, NETCP_MIN_PACKET_SIZE); 1294 if (ret < 0) { 1295 /* If we get here, the skb has already been dropped */ 1296 dev_warn(netcp->ndev_dev, "padding failed (%d), packet dropped\n", 1297 ret); 1298 tx_stats->tx_dropped++; 1299 return ret; 1300 } 1301 skb->len = NETCP_MIN_PACKET_SIZE; 1302 } 1303 1304 desc = netcp_tx_map_skb(skb, netcp); 1305 if (unlikely(!desc)) { 1306 netif_stop_subqueue(ndev, subqueue); 1307 ret = -ENOBUFS; 1308 goto drop; 1309 } 1310 1311 ret = netcp_tx_submit_skb(netcp, skb, desc); 1312 if (ret) 1313 goto drop; 1314 1315 /* Check Tx pool count & stop subqueue if needed */ 1316 desc_count = knav_pool_count(netcp->tx_pool); 1317 if (desc_count < netcp->tx_pause_threshold) { 1318 dev_dbg(netcp->ndev_dev, "pausing tx, count(%d)\n", desc_count); 1319 netif_stop_subqueue(ndev, subqueue); 1320 } 1321 return NETDEV_TX_OK; 1322 1323 drop: 1324 tx_stats->tx_dropped++; 1325 if (desc) 1326 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc)); 1327 dev_kfree_skb(skb); 1328 return ret; 1329 } 1330 1331 int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe) 1332 { 1333 if (tx_pipe->dma_channel) { 1334 knav_dma_close_channel(tx_pipe->dma_channel); 1335 tx_pipe->dma_channel = NULL; 1336 } 1337 return 0; 1338 } 1339 EXPORT_SYMBOL_GPL(netcp_txpipe_close); 1340 1341 int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe) 1342 { 1343 struct device *dev = tx_pipe->netcp_device->device; 1344 struct knav_dma_cfg config; 1345 int ret = 0; 1346 u8 name[16]; 1347 1348 memset(&config, 0, sizeof(config)); 1349 config.direction = DMA_MEM_TO_DEV; 1350 config.u.tx.filt_einfo = false; 1351 config.u.tx.filt_pswords = false; 1352 config.u.tx.priority = DMA_PRIO_MED_L; 1353 1354 tx_pipe->dma_channel = knav_dma_open_channel(dev, 1355 tx_pipe->dma_chan_name, &config); 1356 if (IS_ERR(tx_pipe->dma_channel)) { 1357 dev_err(dev, "failed opening tx chan(%s)\n", 1358 tx_pipe->dma_chan_name); 1359 ret = PTR_ERR(tx_pipe->dma_channel); 1360 goto err; 1361 } 1362 1363 snprintf(name, sizeof(name), "tx-pipe-%s", dev_name(dev)); 1364 tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id, 1365 KNAV_QUEUE_SHARED); 1366 if (IS_ERR(tx_pipe->dma_queue)) { 1367 dev_err(dev, "Could not open DMA queue for channel \"%s\": %d\n", 1368 name, ret); 1369 ret = PTR_ERR(tx_pipe->dma_queue); 1370 goto err; 1371 } 1372 1373 dev_dbg(dev, "opened tx pipe %s\n", name); 1374 return 0; 1375 1376 err: 1377 if (!IS_ERR_OR_NULL(tx_pipe->dma_channel)) 1378 knav_dma_close_channel(tx_pipe->dma_channel); 1379 tx_pipe->dma_channel = NULL; 1380 return ret; 1381 } 1382 EXPORT_SYMBOL_GPL(netcp_txpipe_open); 1383 1384 int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe, 1385 struct netcp_device *netcp_device, 1386 const char *dma_chan_name, unsigned int dma_queue_id) 1387 { 1388 memset(tx_pipe, 0, sizeof(*tx_pipe)); 1389 tx_pipe->netcp_device = netcp_device; 1390 tx_pipe->dma_chan_name = dma_chan_name; 1391 tx_pipe->dma_queue_id = dma_queue_id; 1392 return 0; 1393 } 1394 EXPORT_SYMBOL_GPL(netcp_txpipe_init); 1395 1396 static struct netcp_addr *netcp_addr_find(struct netcp_intf *netcp, 1397 const u8 *addr, 1398 enum netcp_addr_type type) 1399 { 1400 struct netcp_addr *naddr; 1401 1402 list_for_each_entry(naddr, &netcp->addr_list, node) { 1403 if (naddr->type != type) 1404 continue; 1405 if (addr && memcmp(addr, naddr->addr, ETH_ALEN)) 1406 continue; 1407 return naddr; 1408 } 1409 1410 return NULL; 1411 } 1412 1413 static struct netcp_addr *netcp_addr_add(struct netcp_intf *netcp, 1414 const u8 *addr, 1415 enum netcp_addr_type type) 1416 { 1417 struct netcp_addr *naddr; 1418 1419 naddr = devm_kmalloc(netcp->dev, sizeof(*naddr), GFP_ATOMIC); 1420 if (!naddr) 1421 return NULL; 1422 1423 naddr->type = type; 1424 naddr->flags = 0; 1425 naddr->netcp = netcp; 1426 if (addr) 1427 ether_addr_copy(naddr->addr, addr); 1428 else 1429 eth_zero_addr(naddr->addr); 1430 list_add_tail(&naddr->node, &netcp->addr_list); 1431 1432 return naddr; 1433 } 1434 1435 static void netcp_addr_del(struct netcp_intf *netcp, struct netcp_addr *naddr) 1436 { 1437 list_del(&naddr->node); 1438 devm_kfree(netcp->dev, naddr); 1439 } 1440 1441 static void netcp_addr_clear_mark(struct netcp_intf *netcp) 1442 { 1443 struct netcp_addr *naddr; 1444 1445 list_for_each_entry(naddr, &netcp->addr_list, node) 1446 naddr->flags = 0; 1447 } 1448 1449 static void netcp_addr_add_mark(struct netcp_intf *netcp, const u8 *addr, 1450 enum netcp_addr_type type) 1451 { 1452 struct netcp_addr *naddr; 1453 1454 naddr = netcp_addr_find(netcp, addr, type); 1455 if (naddr) { 1456 naddr->flags |= ADDR_VALID; 1457 return; 1458 } 1459 1460 naddr = netcp_addr_add(netcp, addr, type); 1461 if (!WARN_ON(!naddr)) 1462 naddr->flags |= ADDR_NEW; 1463 } 1464 1465 static void netcp_addr_sweep_del(struct netcp_intf *netcp) 1466 { 1467 struct netcp_addr *naddr, *tmp; 1468 struct netcp_intf_modpriv *priv; 1469 struct netcp_module *module; 1470 int error; 1471 1472 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) { 1473 if (naddr->flags & (ADDR_VALID | ADDR_NEW)) 1474 continue; 1475 dev_dbg(netcp->ndev_dev, "deleting address %pM, type %x\n", 1476 naddr->addr, naddr->type); 1477 for_each_module(netcp, priv) { 1478 module = priv->netcp_module; 1479 if (!module->del_addr) 1480 continue; 1481 error = module->del_addr(priv->module_priv, 1482 naddr); 1483 WARN_ON(error); 1484 } 1485 netcp_addr_del(netcp, naddr); 1486 } 1487 } 1488 1489 static void netcp_addr_sweep_add(struct netcp_intf *netcp) 1490 { 1491 struct netcp_addr *naddr, *tmp; 1492 struct netcp_intf_modpriv *priv; 1493 struct netcp_module *module; 1494 int error; 1495 1496 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) { 1497 if (!(naddr->flags & ADDR_NEW)) 1498 continue; 1499 dev_dbg(netcp->ndev_dev, "adding address %pM, type %x\n", 1500 naddr->addr, naddr->type); 1501 1502 for_each_module(netcp, priv) { 1503 module = priv->netcp_module; 1504 if (!module->add_addr) 1505 continue; 1506 error = module->add_addr(priv->module_priv, naddr); 1507 WARN_ON(error); 1508 } 1509 } 1510 } 1511 1512 static void netcp_set_rx_mode(struct net_device *ndev) 1513 { 1514 struct netcp_intf *netcp = netdev_priv(ndev); 1515 struct netdev_hw_addr *ndev_addr; 1516 bool promisc; 1517 1518 promisc = (ndev->flags & IFF_PROMISC || 1519 ndev->flags & IFF_ALLMULTI || 1520 netdev_mc_count(ndev) > NETCP_MAX_MCAST_ADDR); 1521 1522 spin_lock(&netcp->lock); 1523 /* first clear all marks */ 1524 netcp_addr_clear_mark(netcp); 1525 1526 /* next add new entries, mark existing ones */ 1527 netcp_addr_add_mark(netcp, ndev->broadcast, ADDR_BCAST); 1528 for_each_dev_addr(ndev, ndev_addr) 1529 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_DEV); 1530 netdev_for_each_uc_addr(ndev_addr, ndev) 1531 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_UCAST); 1532 netdev_for_each_mc_addr(ndev_addr, ndev) 1533 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_MCAST); 1534 1535 if (promisc) 1536 netcp_addr_add_mark(netcp, NULL, ADDR_ANY); 1537 1538 /* finally sweep and callout into modules */ 1539 netcp_addr_sweep_del(netcp); 1540 netcp_addr_sweep_add(netcp); 1541 spin_unlock(&netcp->lock); 1542 } 1543 1544 static void netcp_free_navigator_resources(struct netcp_intf *netcp) 1545 { 1546 int i; 1547 1548 if (netcp->rx_channel) { 1549 knav_dma_close_channel(netcp->rx_channel); 1550 netcp->rx_channel = NULL; 1551 } 1552 1553 if (!IS_ERR_OR_NULL(netcp->rx_pool)) 1554 netcp_rxpool_free(netcp); 1555 1556 if (!IS_ERR_OR_NULL(netcp->rx_queue)) { 1557 knav_queue_close(netcp->rx_queue); 1558 netcp->rx_queue = NULL; 1559 } 1560 1561 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && 1562 !IS_ERR_OR_NULL(netcp->rx_fdq[i]) ; ++i) { 1563 knav_queue_close(netcp->rx_fdq[i]); 1564 netcp->rx_fdq[i] = NULL; 1565 } 1566 1567 if (!IS_ERR_OR_NULL(netcp->tx_compl_q)) { 1568 knav_queue_close(netcp->tx_compl_q); 1569 netcp->tx_compl_q = NULL; 1570 } 1571 1572 if (!IS_ERR_OR_NULL(netcp->tx_pool)) { 1573 knav_pool_destroy(netcp->tx_pool); 1574 netcp->tx_pool = NULL; 1575 } 1576 } 1577 1578 static int netcp_setup_navigator_resources(struct net_device *ndev) 1579 { 1580 struct netcp_intf *netcp = netdev_priv(ndev); 1581 struct knav_queue_notify_config notify_cfg; 1582 struct knav_dma_cfg config; 1583 u32 last_fdq = 0; 1584 u8 name[16]; 1585 int ret; 1586 int i; 1587 1588 /* Create Rx/Tx descriptor pools */ 1589 snprintf(name, sizeof(name), "rx-pool-%s", ndev->name); 1590 netcp->rx_pool = knav_pool_create(name, netcp->rx_pool_size, 1591 netcp->rx_pool_region_id); 1592 if (IS_ERR_OR_NULL(netcp->rx_pool)) { 1593 dev_err(netcp->ndev_dev, "Couldn't create rx pool\n"); 1594 ret = PTR_ERR(netcp->rx_pool); 1595 goto fail; 1596 } 1597 1598 snprintf(name, sizeof(name), "tx-pool-%s", ndev->name); 1599 netcp->tx_pool = knav_pool_create(name, netcp->tx_pool_size, 1600 netcp->tx_pool_region_id); 1601 if (IS_ERR_OR_NULL(netcp->tx_pool)) { 1602 dev_err(netcp->ndev_dev, "Couldn't create tx pool\n"); 1603 ret = PTR_ERR(netcp->tx_pool); 1604 goto fail; 1605 } 1606 1607 /* open Tx completion queue */ 1608 snprintf(name, sizeof(name), "tx-compl-%s", ndev->name); 1609 netcp->tx_compl_q = knav_queue_open(name, netcp->tx_compl_qid, 0); 1610 if (IS_ERR(netcp->tx_compl_q)) { 1611 ret = PTR_ERR(netcp->tx_compl_q); 1612 goto fail; 1613 } 1614 netcp->tx_compl_qid = knav_queue_get_id(netcp->tx_compl_q); 1615 1616 /* Set notification for Tx completion */ 1617 notify_cfg.fn = netcp_tx_notify; 1618 notify_cfg.fn_arg = netcp; 1619 ret = knav_queue_device_control(netcp->tx_compl_q, 1620 KNAV_QUEUE_SET_NOTIFIER, 1621 (unsigned long)¬ify_cfg); 1622 if (ret) 1623 goto fail; 1624 1625 knav_queue_disable_notify(netcp->tx_compl_q); 1626 1627 /* open Rx completion queue */ 1628 snprintf(name, sizeof(name), "rx-compl-%s", ndev->name); 1629 netcp->rx_queue = knav_queue_open(name, netcp->rx_queue_id, 0); 1630 if (IS_ERR(netcp->rx_queue)) { 1631 ret = PTR_ERR(netcp->rx_queue); 1632 goto fail; 1633 } 1634 netcp->rx_queue_id = knav_queue_get_id(netcp->rx_queue); 1635 1636 /* Set notification for Rx completion */ 1637 notify_cfg.fn = netcp_rx_notify; 1638 notify_cfg.fn_arg = netcp; 1639 ret = knav_queue_device_control(netcp->rx_queue, 1640 KNAV_QUEUE_SET_NOTIFIER, 1641 (unsigned long)¬ify_cfg); 1642 if (ret) 1643 goto fail; 1644 1645 knav_queue_disable_notify(netcp->rx_queue); 1646 1647 /* open Rx FDQs */ 1648 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_queue_depths[i]; 1649 ++i) { 1650 snprintf(name, sizeof(name), "rx-fdq-%s-%d", ndev->name, i); 1651 netcp->rx_fdq[i] = knav_queue_open(name, KNAV_QUEUE_GP, 0); 1652 if (IS_ERR(netcp->rx_fdq[i])) { 1653 ret = PTR_ERR(netcp->rx_fdq[i]); 1654 goto fail; 1655 } 1656 } 1657 1658 memset(&config, 0, sizeof(config)); 1659 config.direction = DMA_DEV_TO_MEM; 1660 config.u.rx.einfo_present = true; 1661 config.u.rx.psinfo_present = true; 1662 config.u.rx.err_mode = DMA_DROP; 1663 config.u.rx.desc_type = DMA_DESC_HOST; 1664 config.u.rx.psinfo_at_sop = false; 1665 config.u.rx.sop_offset = NETCP_SOP_OFFSET; 1666 config.u.rx.dst_q = netcp->rx_queue_id; 1667 config.u.rx.thresh = DMA_THRESH_NONE; 1668 1669 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN; ++i) { 1670 if (netcp->rx_fdq[i]) 1671 last_fdq = knav_queue_get_id(netcp->rx_fdq[i]); 1672 config.u.rx.fdq[i] = last_fdq; 1673 } 1674 1675 netcp->rx_channel = knav_dma_open_channel(netcp->netcp_device->device, 1676 netcp->dma_chan_name, &config); 1677 if (IS_ERR(netcp->rx_channel)) { 1678 dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n", 1679 netcp->dma_chan_name); 1680 ret = PTR_ERR(netcp->rx_channel); 1681 goto fail; 1682 } 1683 1684 dev_dbg(netcp->ndev_dev, "opened RX channel: %p\n", netcp->rx_channel); 1685 return 0; 1686 1687 fail: 1688 netcp_free_navigator_resources(netcp); 1689 return ret; 1690 } 1691 1692 /* Open the device */ 1693 static int netcp_ndo_open(struct net_device *ndev) 1694 { 1695 struct netcp_intf *netcp = netdev_priv(ndev); 1696 struct netcp_intf_modpriv *intf_modpriv; 1697 struct netcp_module *module; 1698 int ret; 1699 1700 netif_carrier_off(ndev); 1701 ret = netcp_setup_navigator_resources(ndev); 1702 if (ret) { 1703 dev_err(netcp->ndev_dev, "Failed to setup navigator resources\n"); 1704 goto fail; 1705 } 1706 1707 for_each_module(netcp, intf_modpriv) { 1708 module = intf_modpriv->netcp_module; 1709 if (module->open) { 1710 ret = module->open(intf_modpriv->module_priv, ndev); 1711 if (ret != 0) { 1712 dev_err(netcp->ndev_dev, "module open failed\n"); 1713 goto fail_open; 1714 } 1715 } 1716 } 1717 1718 napi_enable(&netcp->rx_napi); 1719 napi_enable(&netcp->tx_napi); 1720 knav_queue_enable_notify(netcp->tx_compl_q); 1721 knav_queue_enable_notify(netcp->rx_queue); 1722 netcp_rxpool_refill(netcp); 1723 netif_tx_wake_all_queues(ndev); 1724 dev_dbg(netcp->ndev_dev, "netcp device %s opened\n", ndev->name); 1725 return 0; 1726 1727 fail_open: 1728 for_each_module(netcp, intf_modpriv) { 1729 module = intf_modpriv->netcp_module; 1730 if (module->close) 1731 module->close(intf_modpriv->module_priv, ndev); 1732 } 1733 1734 fail: 1735 netcp_free_navigator_resources(netcp); 1736 return ret; 1737 } 1738 1739 /* Close the device */ 1740 static int netcp_ndo_stop(struct net_device *ndev) 1741 { 1742 struct netcp_intf *netcp = netdev_priv(ndev); 1743 struct netcp_intf_modpriv *intf_modpriv; 1744 struct netcp_module *module; 1745 int err = 0; 1746 1747 netif_tx_stop_all_queues(ndev); 1748 netif_carrier_off(ndev); 1749 netcp_addr_clear_mark(netcp); 1750 netcp_addr_sweep_del(netcp); 1751 knav_queue_disable_notify(netcp->rx_queue); 1752 knav_queue_disable_notify(netcp->tx_compl_q); 1753 napi_disable(&netcp->rx_napi); 1754 napi_disable(&netcp->tx_napi); 1755 1756 for_each_module(netcp, intf_modpriv) { 1757 module = intf_modpriv->netcp_module; 1758 if (module->close) { 1759 err = module->close(intf_modpriv->module_priv, ndev); 1760 if (err != 0) 1761 dev_err(netcp->ndev_dev, "Close failed\n"); 1762 } 1763 } 1764 1765 /* Recycle Rx descriptors from completion queue */ 1766 netcp_empty_rx_queue(netcp); 1767 1768 /* Recycle Tx descriptors from completion queue */ 1769 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size); 1770 1771 if (knav_pool_count(netcp->tx_pool) != netcp->tx_pool_size) 1772 dev_err(netcp->ndev_dev, "Lost (%d) Tx descs\n", 1773 netcp->tx_pool_size - knav_pool_count(netcp->tx_pool)); 1774 1775 netcp_free_navigator_resources(netcp); 1776 dev_dbg(netcp->ndev_dev, "netcp device %s stopped\n", ndev->name); 1777 return 0; 1778 } 1779 1780 static int netcp_ndo_ioctl(struct net_device *ndev, 1781 struct ifreq *req, int cmd) 1782 { 1783 struct netcp_intf *netcp = netdev_priv(ndev); 1784 struct netcp_intf_modpriv *intf_modpriv; 1785 struct netcp_module *module; 1786 int ret = -1, err = -EOPNOTSUPP; 1787 1788 if (!netif_running(ndev)) 1789 return -EINVAL; 1790 1791 for_each_module(netcp, intf_modpriv) { 1792 module = intf_modpriv->netcp_module; 1793 if (!module->ioctl) 1794 continue; 1795 1796 err = module->ioctl(intf_modpriv->module_priv, req, cmd); 1797 if ((err < 0) && (err != -EOPNOTSUPP)) { 1798 ret = err; 1799 goto out; 1800 } 1801 if (err == 0) 1802 ret = err; 1803 } 1804 1805 out: 1806 return (ret == 0) ? 0 : err; 1807 } 1808 1809 static void netcp_ndo_tx_timeout(struct net_device *ndev) 1810 { 1811 struct netcp_intf *netcp = netdev_priv(ndev); 1812 unsigned int descs = knav_pool_count(netcp->tx_pool); 1813 1814 dev_err(netcp->ndev_dev, "transmit timed out tx descs(%d)\n", descs); 1815 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size); 1816 netif_trans_update(ndev); 1817 netif_tx_wake_all_queues(ndev); 1818 } 1819 1820 static int netcp_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid) 1821 { 1822 struct netcp_intf *netcp = netdev_priv(ndev); 1823 struct netcp_intf_modpriv *intf_modpriv; 1824 struct netcp_module *module; 1825 unsigned long flags; 1826 int err = 0; 1827 1828 dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid); 1829 1830 spin_lock_irqsave(&netcp->lock, flags); 1831 for_each_module(netcp, intf_modpriv) { 1832 module = intf_modpriv->netcp_module; 1833 if ((module->add_vid) && (vid != 0)) { 1834 err = module->add_vid(intf_modpriv->module_priv, vid); 1835 if (err != 0) { 1836 dev_err(netcp->ndev_dev, "Could not add vlan id = %d\n", 1837 vid); 1838 break; 1839 } 1840 } 1841 } 1842 spin_unlock_irqrestore(&netcp->lock, flags); 1843 1844 return err; 1845 } 1846 1847 static int netcp_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid) 1848 { 1849 struct netcp_intf *netcp = netdev_priv(ndev); 1850 struct netcp_intf_modpriv *intf_modpriv; 1851 struct netcp_module *module; 1852 unsigned long flags; 1853 int err = 0; 1854 1855 dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid); 1856 1857 spin_lock_irqsave(&netcp->lock, flags); 1858 for_each_module(netcp, intf_modpriv) { 1859 module = intf_modpriv->netcp_module; 1860 if (module->del_vid) { 1861 err = module->del_vid(intf_modpriv->module_priv, vid); 1862 if (err != 0) { 1863 dev_err(netcp->ndev_dev, "Could not delete vlan id = %d\n", 1864 vid); 1865 break; 1866 } 1867 } 1868 } 1869 spin_unlock_irqrestore(&netcp->lock, flags); 1870 return err; 1871 } 1872 1873 static u16 netcp_select_queue(struct net_device *dev, struct sk_buff *skb, 1874 void *accel_priv, 1875 select_queue_fallback_t fallback) 1876 { 1877 return 0; 1878 } 1879 1880 static int netcp_setup_tc(struct net_device *dev, enum tc_setup_type type, 1881 void *type_data) 1882 { 1883 struct tc_mqprio_qopt *mqprio = type_data; 1884 u8 num_tc; 1885 int i; 1886 1887 /* setup tc must be called under rtnl lock */ 1888 ASSERT_RTNL(); 1889 1890 if (type != TC_SETUP_QDISC_MQPRIO) 1891 return -EOPNOTSUPP; 1892 1893 mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS; 1894 num_tc = mqprio->num_tc; 1895 1896 /* Sanity-check the number of traffic classes requested */ 1897 if ((dev->real_num_tx_queues <= 1) || 1898 (dev->real_num_tx_queues < num_tc)) 1899 return -EINVAL; 1900 1901 /* Configure traffic class to queue mappings */ 1902 if (num_tc) { 1903 netdev_set_num_tc(dev, num_tc); 1904 for (i = 0; i < num_tc; i++) 1905 netdev_set_tc_queue(dev, i, 1, i); 1906 } else { 1907 netdev_reset_tc(dev); 1908 } 1909 1910 return 0; 1911 } 1912 1913 static void 1914 netcp_get_stats(struct net_device *ndev, struct rtnl_link_stats64 *stats) 1915 { 1916 struct netcp_intf *netcp = netdev_priv(ndev); 1917 struct netcp_stats *p = &netcp->stats; 1918 u64 rxpackets, rxbytes, txpackets, txbytes; 1919 unsigned int start; 1920 1921 do { 1922 start = u64_stats_fetch_begin_irq(&p->syncp_rx); 1923 rxpackets = p->rx_packets; 1924 rxbytes = p->rx_bytes; 1925 } while (u64_stats_fetch_retry_irq(&p->syncp_rx, start)); 1926 1927 do { 1928 start = u64_stats_fetch_begin_irq(&p->syncp_tx); 1929 txpackets = p->tx_packets; 1930 txbytes = p->tx_bytes; 1931 } while (u64_stats_fetch_retry_irq(&p->syncp_tx, start)); 1932 1933 stats->rx_packets = rxpackets; 1934 stats->rx_bytes = rxbytes; 1935 stats->tx_packets = txpackets; 1936 stats->tx_bytes = txbytes; 1937 1938 /* The following are stored as 32 bit */ 1939 stats->rx_errors = p->rx_errors; 1940 stats->rx_dropped = p->rx_dropped; 1941 stats->tx_dropped = p->tx_dropped; 1942 } 1943 1944 static const struct net_device_ops netcp_netdev_ops = { 1945 .ndo_open = netcp_ndo_open, 1946 .ndo_stop = netcp_ndo_stop, 1947 .ndo_start_xmit = netcp_ndo_start_xmit, 1948 .ndo_set_rx_mode = netcp_set_rx_mode, 1949 .ndo_do_ioctl = netcp_ndo_ioctl, 1950 .ndo_get_stats64 = netcp_get_stats, 1951 .ndo_set_mac_address = eth_mac_addr, 1952 .ndo_validate_addr = eth_validate_addr, 1953 .ndo_vlan_rx_add_vid = netcp_rx_add_vid, 1954 .ndo_vlan_rx_kill_vid = netcp_rx_kill_vid, 1955 .ndo_tx_timeout = netcp_ndo_tx_timeout, 1956 .ndo_select_queue = netcp_select_queue, 1957 .ndo_setup_tc = netcp_setup_tc, 1958 }; 1959 1960 static int netcp_create_interface(struct netcp_device *netcp_device, 1961 struct device_node *node_interface) 1962 { 1963 struct device *dev = netcp_device->device; 1964 struct device_node *node = dev->of_node; 1965 struct netcp_intf *netcp; 1966 struct net_device *ndev; 1967 resource_size_t size; 1968 struct resource res; 1969 void __iomem *efuse = NULL; 1970 u32 efuse_mac = 0; 1971 const void *mac_addr; 1972 u8 efuse_mac_addr[6]; 1973 u32 temp[2]; 1974 int ret = 0; 1975 1976 ndev = alloc_etherdev_mqs(sizeof(*netcp), 1, 1); 1977 if (!ndev) { 1978 dev_err(dev, "Error allocating netdev\n"); 1979 return -ENOMEM; 1980 } 1981 1982 ndev->features |= NETIF_F_SG; 1983 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1984 ndev->hw_features = ndev->features; 1985 ndev->vlan_features |= NETIF_F_SG; 1986 1987 /* MTU range: 68 - 9486 */ 1988 ndev->min_mtu = ETH_MIN_MTU; 1989 ndev->max_mtu = NETCP_MAX_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN); 1990 1991 netcp = netdev_priv(ndev); 1992 spin_lock_init(&netcp->lock); 1993 INIT_LIST_HEAD(&netcp->module_head); 1994 INIT_LIST_HEAD(&netcp->txhook_list_head); 1995 INIT_LIST_HEAD(&netcp->rxhook_list_head); 1996 INIT_LIST_HEAD(&netcp->addr_list); 1997 u64_stats_init(&netcp->stats.syncp_rx); 1998 u64_stats_init(&netcp->stats.syncp_tx); 1999 netcp->netcp_device = netcp_device; 2000 netcp->dev = netcp_device->device; 2001 netcp->ndev = ndev; 2002 netcp->ndev_dev = &ndev->dev; 2003 netcp->msg_enable = netif_msg_init(netcp_debug_level, NETCP_DEBUG); 2004 netcp->tx_pause_threshold = MAX_SKB_FRAGS; 2005 netcp->tx_resume_threshold = netcp->tx_pause_threshold; 2006 netcp->node_interface = node_interface; 2007 2008 ret = of_property_read_u32(node_interface, "efuse-mac", &efuse_mac); 2009 if (efuse_mac) { 2010 if (of_address_to_resource(node, NETCP_EFUSE_REG_INDEX, &res)) { 2011 dev_err(dev, "could not find efuse-mac reg resource\n"); 2012 ret = -ENODEV; 2013 goto quit; 2014 } 2015 size = resource_size(&res); 2016 2017 if (!devm_request_mem_region(dev, res.start, size, 2018 dev_name(dev))) { 2019 dev_err(dev, "could not reserve resource\n"); 2020 ret = -ENOMEM; 2021 goto quit; 2022 } 2023 2024 efuse = devm_ioremap_nocache(dev, res.start, size); 2025 if (!efuse) { 2026 dev_err(dev, "could not map resource\n"); 2027 devm_release_mem_region(dev, res.start, size); 2028 ret = -ENOMEM; 2029 goto quit; 2030 } 2031 2032 emac_arch_get_mac_addr(efuse_mac_addr, efuse, efuse_mac); 2033 if (is_valid_ether_addr(efuse_mac_addr)) 2034 ether_addr_copy(ndev->dev_addr, efuse_mac_addr); 2035 else 2036 random_ether_addr(ndev->dev_addr); 2037 2038 devm_iounmap(dev, efuse); 2039 devm_release_mem_region(dev, res.start, size); 2040 } else { 2041 mac_addr = of_get_mac_address(node_interface); 2042 if (mac_addr) 2043 ether_addr_copy(ndev->dev_addr, mac_addr); 2044 else 2045 random_ether_addr(ndev->dev_addr); 2046 } 2047 2048 ret = of_property_read_string(node_interface, "rx-channel", 2049 &netcp->dma_chan_name); 2050 if (ret < 0) { 2051 dev_err(dev, "missing \"rx-channel\" parameter\n"); 2052 ret = -ENODEV; 2053 goto quit; 2054 } 2055 2056 ret = of_property_read_u32(node_interface, "rx-queue", 2057 &netcp->rx_queue_id); 2058 if (ret < 0) { 2059 dev_warn(dev, "missing \"rx-queue\" parameter\n"); 2060 netcp->rx_queue_id = KNAV_QUEUE_QPEND; 2061 } 2062 2063 ret = of_property_read_u32_array(node_interface, "rx-queue-depth", 2064 netcp->rx_queue_depths, 2065 KNAV_DMA_FDQ_PER_CHAN); 2066 if (ret < 0) { 2067 dev_err(dev, "missing \"rx-queue-depth\" parameter\n"); 2068 netcp->rx_queue_depths[0] = 128; 2069 } 2070 2071 ret = of_property_read_u32_array(node_interface, "rx-pool", temp, 2); 2072 if (ret < 0) { 2073 dev_err(dev, "missing \"rx-pool\" parameter\n"); 2074 ret = -ENODEV; 2075 goto quit; 2076 } 2077 netcp->rx_pool_size = temp[0]; 2078 netcp->rx_pool_region_id = temp[1]; 2079 2080 ret = of_property_read_u32_array(node_interface, "tx-pool", temp, 2); 2081 if (ret < 0) { 2082 dev_err(dev, "missing \"tx-pool\" parameter\n"); 2083 ret = -ENODEV; 2084 goto quit; 2085 } 2086 netcp->tx_pool_size = temp[0]; 2087 netcp->tx_pool_region_id = temp[1]; 2088 2089 if (netcp->tx_pool_size < MAX_SKB_FRAGS) { 2090 dev_err(dev, "tx-pool size too small, must be atleast(%ld)\n", 2091 MAX_SKB_FRAGS); 2092 ret = -ENODEV; 2093 goto quit; 2094 } 2095 2096 ret = of_property_read_u32(node_interface, "tx-completion-queue", 2097 &netcp->tx_compl_qid); 2098 if (ret < 0) { 2099 dev_warn(dev, "missing \"tx-completion-queue\" parameter\n"); 2100 netcp->tx_compl_qid = KNAV_QUEUE_QPEND; 2101 } 2102 2103 /* NAPI register */ 2104 netif_napi_add(ndev, &netcp->rx_napi, netcp_rx_poll, NETCP_NAPI_WEIGHT); 2105 netif_tx_napi_add(ndev, &netcp->tx_napi, netcp_tx_poll, NETCP_NAPI_WEIGHT); 2106 2107 /* Register the network device */ 2108 ndev->dev_id = 0; 2109 ndev->watchdog_timeo = NETCP_TX_TIMEOUT; 2110 ndev->netdev_ops = &netcp_netdev_ops; 2111 SET_NETDEV_DEV(ndev, dev); 2112 2113 list_add_tail(&netcp->interface_list, &netcp_device->interface_head); 2114 return 0; 2115 2116 quit: 2117 free_netdev(ndev); 2118 return ret; 2119 } 2120 2121 static void netcp_delete_interface(struct netcp_device *netcp_device, 2122 struct net_device *ndev) 2123 { 2124 struct netcp_intf_modpriv *intf_modpriv, *tmp; 2125 struct netcp_intf *netcp = netdev_priv(ndev); 2126 struct netcp_module *module; 2127 2128 dev_dbg(netcp_device->device, "Removing interface \"%s\"\n", 2129 ndev->name); 2130 2131 /* Notify each of the modules that the interface is going away */ 2132 list_for_each_entry_safe(intf_modpriv, tmp, &netcp->module_head, 2133 intf_list) { 2134 module = intf_modpriv->netcp_module; 2135 dev_dbg(netcp_device->device, "Releasing module \"%s\"\n", 2136 module->name); 2137 if (module->release) 2138 module->release(intf_modpriv->module_priv); 2139 list_del(&intf_modpriv->intf_list); 2140 } 2141 WARN(!list_empty(&netcp->module_head), "%s interface module list is not empty!\n", 2142 ndev->name); 2143 2144 list_del(&netcp->interface_list); 2145 2146 of_node_put(netcp->node_interface); 2147 unregister_netdev(ndev); 2148 free_netdev(ndev); 2149 } 2150 2151 static int netcp_probe(struct platform_device *pdev) 2152 { 2153 struct device_node *node = pdev->dev.of_node; 2154 struct netcp_intf *netcp_intf, *netcp_tmp; 2155 struct device_node *child, *interfaces; 2156 struct netcp_device *netcp_device; 2157 struct device *dev = &pdev->dev; 2158 int ret; 2159 2160 if (!node) { 2161 dev_err(dev, "could not find device info\n"); 2162 return -ENODEV; 2163 } 2164 2165 /* Allocate a new NETCP device instance */ 2166 netcp_device = devm_kzalloc(dev, sizeof(*netcp_device), GFP_KERNEL); 2167 if (!netcp_device) 2168 return -ENOMEM; 2169 2170 pm_runtime_enable(&pdev->dev); 2171 ret = pm_runtime_get_sync(&pdev->dev); 2172 if (ret < 0) { 2173 dev_err(dev, "Failed to enable NETCP power-domain\n"); 2174 pm_runtime_disable(&pdev->dev); 2175 return ret; 2176 } 2177 2178 /* Initialize the NETCP device instance */ 2179 INIT_LIST_HEAD(&netcp_device->interface_head); 2180 INIT_LIST_HEAD(&netcp_device->modpriv_head); 2181 netcp_device->device = dev; 2182 platform_set_drvdata(pdev, netcp_device); 2183 2184 /* create interfaces */ 2185 interfaces = of_get_child_by_name(node, "netcp-interfaces"); 2186 if (!interfaces) { 2187 dev_err(dev, "could not find netcp-interfaces node\n"); 2188 ret = -ENODEV; 2189 goto probe_quit; 2190 } 2191 2192 for_each_available_child_of_node(interfaces, child) { 2193 ret = netcp_create_interface(netcp_device, child); 2194 if (ret) { 2195 dev_err(dev, "could not create interface(%s)\n", 2196 child->name); 2197 goto probe_quit_interface; 2198 } 2199 } 2200 2201 of_node_put(interfaces); 2202 2203 /* Add the device instance to the list */ 2204 list_add_tail(&netcp_device->device_list, &netcp_devices); 2205 2206 return 0; 2207 2208 probe_quit_interface: 2209 list_for_each_entry_safe(netcp_intf, netcp_tmp, 2210 &netcp_device->interface_head, 2211 interface_list) { 2212 netcp_delete_interface(netcp_device, netcp_intf->ndev); 2213 } 2214 2215 of_node_put(interfaces); 2216 2217 probe_quit: 2218 pm_runtime_put_sync(&pdev->dev); 2219 pm_runtime_disable(&pdev->dev); 2220 platform_set_drvdata(pdev, NULL); 2221 return ret; 2222 } 2223 2224 static int netcp_remove(struct platform_device *pdev) 2225 { 2226 struct netcp_device *netcp_device = platform_get_drvdata(pdev); 2227 struct netcp_intf *netcp_intf, *netcp_tmp; 2228 struct netcp_inst_modpriv *inst_modpriv, *tmp; 2229 struct netcp_module *module; 2230 2231 list_for_each_entry_safe(inst_modpriv, tmp, &netcp_device->modpriv_head, 2232 inst_list) { 2233 module = inst_modpriv->netcp_module; 2234 dev_dbg(&pdev->dev, "Removing module \"%s\"\n", module->name); 2235 module->remove(netcp_device, inst_modpriv->module_priv); 2236 list_del(&inst_modpriv->inst_list); 2237 } 2238 2239 /* now that all modules are removed, clean up the interfaces */ 2240 list_for_each_entry_safe(netcp_intf, netcp_tmp, 2241 &netcp_device->interface_head, 2242 interface_list) { 2243 netcp_delete_interface(netcp_device, netcp_intf->ndev); 2244 } 2245 2246 WARN(!list_empty(&netcp_device->interface_head), 2247 "%s interface list not empty!\n", pdev->name); 2248 2249 pm_runtime_put_sync(&pdev->dev); 2250 pm_runtime_disable(&pdev->dev); 2251 platform_set_drvdata(pdev, NULL); 2252 return 0; 2253 } 2254 2255 static const struct of_device_id of_match[] = { 2256 { .compatible = "ti,netcp-1.0", }, 2257 {}, 2258 }; 2259 MODULE_DEVICE_TABLE(of, of_match); 2260 2261 static struct platform_driver netcp_driver = { 2262 .driver = { 2263 .name = "netcp-1.0", 2264 .of_match_table = of_match, 2265 }, 2266 .probe = netcp_probe, 2267 .remove = netcp_remove, 2268 }; 2269 module_platform_driver(netcp_driver); 2270 2271 MODULE_LICENSE("GPL v2"); 2272 MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs"); 2273 MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com"); 2274