2280 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * Keystone NetCP Core driver4 *5 * Copyright (C) 2014 Texas Instruments Incorporated6 * Authors: Sandeep Nair <sandeep_n@ti.com>7 * Sandeep Paulraj <s-paulraj@ti.com>8 * Cyril Chemparathy <cyril@ti.com>9 * Santosh Shilimkar <santosh.shilimkar@ti.com>10 * Murali Karicheri <m-karicheri2@ti.com>11 * Wingman Kwok <w-kwok2@ti.com>12 */13 14#include <linux/io.h>15#include <linux/module.h>16#include <linux/of_net.h>17#include <linux/of_address.h>18#include <linux/if_vlan.h>19#include <linux/pm_runtime.h>20#include <linux/platform_device.h>21#include <linux/soc/ti/knav_qmss.h>22#include <linux/soc/ti/knav_dma.h>23 24#include "netcp.h"25 26#define NETCP_SOP_OFFSET (NET_IP_ALIGN + NET_SKB_PAD)27#define NETCP_TX_TIMEOUT (5 * HZ)28#define NETCP_PACKET_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN)29#define NETCP_MIN_PACKET_SIZE ETH_ZLEN30#define NETCP_MAX_MCAST_ADDR 1631 32#define NETCP_EFUSE_REG_INDEX 033 34#define NETCP_MOD_PROBE_SKIPPED 135#define NETCP_MOD_PROBE_FAILED 236 37#define NETCP_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \38 NETIF_MSG_DRV | NETIF_MSG_LINK | \39 NETIF_MSG_IFUP | NETIF_MSG_INTR | \40 NETIF_MSG_PROBE | NETIF_MSG_TIMER | \41 NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \42 NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \43 NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \44 NETIF_MSG_RX_STATUS)45 46#define NETCP_EFUSE_ADDR_SWAP 247 48#define knav_queue_get_id(q) knav_queue_device_control(q, \49 KNAV_QUEUE_GET_ID, (unsigned long)NULL)50 51#define knav_queue_enable_notify(q) knav_queue_device_control(q, \52 KNAV_QUEUE_ENABLE_NOTIFY, \53 (unsigned long)NULL)54 55#define knav_queue_disable_notify(q) knav_queue_device_control(q, \56 KNAV_QUEUE_DISABLE_NOTIFY, \57 (unsigned long)NULL)58 59#define knav_queue_get_count(q) knav_queue_device_control(q, \60 KNAV_QUEUE_GET_COUNT, (unsigned long)NULL)61 62#define for_each_netcp_module(module) \63 list_for_each_entry(module, &netcp_modules, module_list)64 65#define for_each_netcp_device_module(netcp_device, inst_modpriv) \66 list_for_each_entry(inst_modpriv, \67 &((netcp_device)->modpriv_head), inst_list)68 69#define for_each_module(netcp, intf_modpriv) \70 list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list)71 72/* Module management structures */73struct netcp_device {74 struct list_head device_list;75 struct list_head interface_head;76 struct list_head modpriv_head;77 struct device *device;78};79 80struct netcp_inst_modpriv {81 struct netcp_device *netcp_device;82 struct netcp_module *netcp_module;83 struct list_head inst_list;84 void *module_priv;85};86 87struct netcp_intf_modpriv {88 struct netcp_intf *netcp_priv;89 struct netcp_module *netcp_module;90 struct list_head intf_list;91 void *module_priv;92};93 94struct netcp_tx_cb {95 void *ts_context;96 void (*txtstamp)(void *context, struct sk_buff *skb);97};98 99static LIST_HEAD(netcp_devices);100static LIST_HEAD(netcp_modules);101static DEFINE_MUTEX(netcp_modules_lock);102 103static int netcp_debug_level = -1;104module_param(netcp_debug_level, int, 0);105MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");106 107/* Helper functions - Get/Set */108static void get_pkt_info(dma_addr_t *buff, u32 *buff_len, dma_addr_t *ndesc,109 struct knav_dma_desc *desc)110{111 *buff_len = le32_to_cpu(desc->buff_len);112 *buff = le32_to_cpu(desc->buff);113 *ndesc = le32_to_cpu(desc->next_desc);114}115 116static void get_desc_info(u32 *desc_info, u32 *pkt_info,117 struct knav_dma_desc *desc)118{119 *desc_info = le32_to_cpu(desc->desc_info);120 *pkt_info = le32_to_cpu(desc->packet_info);121}122 123static u32 get_sw_data(int index, struct knav_dma_desc *desc)124{125 /* No Endian conversion needed as this data is untouched by hw */126 return desc->sw_data[index];127}128 129/* use these macros to get sw data */130#define GET_SW_DATA0(desc) get_sw_data(0, desc)131#define GET_SW_DATA1(desc) get_sw_data(1, desc)132#define GET_SW_DATA2(desc) get_sw_data(2, desc)133#define GET_SW_DATA3(desc) get_sw_data(3, desc)134 135static void get_org_pkt_info(dma_addr_t *buff, u32 *buff_len,136 struct knav_dma_desc *desc)137{138 *buff = le32_to_cpu(desc->orig_buff);139 *buff_len = le32_to_cpu(desc->orig_len);140}141 142static void get_words(dma_addr_t *words, int num_words, __le32 *desc)143{144 int i;145 146 for (i = 0; i < num_words; i++)147 words[i] = le32_to_cpu(desc[i]);148}149 150static void set_pkt_info(dma_addr_t buff, u32 buff_len, u32 ndesc,151 struct knav_dma_desc *desc)152{153 desc->buff_len = cpu_to_le32(buff_len);154 desc->buff = cpu_to_le32(buff);155 desc->next_desc = cpu_to_le32(ndesc);156}157 158static void set_desc_info(u32 desc_info, u32 pkt_info,159 struct knav_dma_desc *desc)160{161 desc->desc_info = cpu_to_le32(desc_info);162 desc->packet_info = cpu_to_le32(pkt_info);163}164 165static void set_sw_data(int index, u32 data, struct knav_dma_desc *desc)166{167 /* No Endian conversion needed as this data is untouched by hw */168 desc->sw_data[index] = data;169}170 171/* use these macros to set sw data */172#define SET_SW_DATA0(data, desc) set_sw_data(0, data, desc)173#define SET_SW_DATA1(data, desc) set_sw_data(1, data, desc)174#define SET_SW_DATA2(data, desc) set_sw_data(2, data, desc)175#define SET_SW_DATA3(data, desc) set_sw_data(3, data, desc)176 177static void set_org_pkt_info(dma_addr_t buff, u32 buff_len,178 struct knav_dma_desc *desc)179{180 desc->orig_buff = cpu_to_le32(buff);181 desc->orig_len = cpu_to_le32(buff_len);182}183 184static void set_words(u32 *words, int num_words, __le32 *desc)185{186 int i;187 188 for (i = 0; i < num_words; i++)189 desc[i] = cpu_to_le32(words[i]);190}191 192/* Read the e-fuse value as 32 bit values to be endian independent */193static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac, u32 swap)194{195 unsigned int addr0, addr1;196 197 addr1 = readl(efuse_mac + 4);198 addr0 = readl(efuse_mac);199 200 switch (swap) {201 case NETCP_EFUSE_ADDR_SWAP:202 addr0 = addr1;203 addr1 = readl(efuse_mac);204 break;205 default:206 break;207 }208 209 x[0] = (addr1 & 0x0000ff00) >> 8;210 x[1] = addr1 & 0x000000ff;211 x[2] = (addr0 & 0xff000000) >> 24;212 x[3] = (addr0 & 0x00ff0000) >> 16;213 x[4] = (addr0 & 0x0000ff00) >> 8;214 x[5] = addr0 & 0x000000ff;215 216 return 0;217}218 219/* Module management routines */220static int netcp_register_interface(struct netcp_intf *netcp)221{222 int ret;223 224 ret = register_netdev(netcp->ndev);225 if (!ret)226 netcp->netdev_registered = true;227 return ret;228}229 230static int netcp_module_probe(struct netcp_device *netcp_device,231 struct netcp_module *module)232{233 struct device *dev = netcp_device->device;234 struct device_node *devices, *interface, *node = dev->of_node;235 struct device_node *child;236 struct netcp_inst_modpriv *inst_modpriv;237 struct netcp_intf *netcp_intf;238 struct netcp_module *tmp;239 bool primary_module_registered = false;240 int ret;241 242 /* Find this module in the sub-tree for this device */243 devices = of_get_child_by_name(node, "netcp-devices");244 if (!devices) {245 dev_err(dev, "could not find netcp-devices node\n");246 return NETCP_MOD_PROBE_SKIPPED;247 }248 249 for_each_available_child_of_node(devices, child) {250 const char *name;251 char node_name[32];252 253 if (of_property_read_string(child, "label", &name) < 0) {254 snprintf(node_name, sizeof(node_name), "%pOFn", child);255 name = node_name;256 }257 if (!strcasecmp(module->name, name))258 break;259 }260 261 of_node_put(devices);262 /* If module not used for this device, skip it */263 if (!child) {264 dev_warn(dev, "module(%s) not used for device\n", module->name);265 return NETCP_MOD_PROBE_SKIPPED;266 }267 268 inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL);269 if (!inst_modpriv) {270 of_node_put(child);271 return -ENOMEM;272 }273 274 inst_modpriv->netcp_device = netcp_device;275 inst_modpriv->netcp_module = module;276 list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head);277 278 ret = module->probe(netcp_device, dev, child,279 &inst_modpriv->module_priv);280 of_node_put(child);281 if (ret) {282 dev_err(dev, "Probe of module(%s) failed with %d\n",283 module->name, ret);284 list_del(&inst_modpriv->inst_list);285 devm_kfree(dev, inst_modpriv);286 return NETCP_MOD_PROBE_FAILED;287 }288 289 /* Attach modules only if the primary module is probed */290 for_each_netcp_module(tmp) {291 if (tmp->primary)292 primary_module_registered = true;293 }294 295 if (!primary_module_registered)296 return 0;297 298 /* Attach module to interfaces */299 list_for_each_entry(netcp_intf, &netcp_device->interface_head,300 interface_list) {301 struct netcp_intf_modpriv *intf_modpriv;302 303 intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv),304 GFP_KERNEL);305 if (!intf_modpriv)306 return -ENOMEM;307 308 interface = of_parse_phandle(netcp_intf->node_interface,309 module->name, 0);310 311 if (!interface) {312 devm_kfree(dev, intf_modpriv);313 continue;314 }315 316 intf_modpriv->netcp_priv = netcp_intf;317 intf_modpriv->netcp_module = module;318 list_add_tail(&intf_modpriv->intf_list,319 &netcp_intf->module_head);320 321 ret = module->attach(inst_modpriv->module_priv,322 netcp_intf->ndev, interface,323 &intf_modpriv->module_priv);324 of_node_put(interface);325 if (ret) {326 dev_dbg(dev, "Attach of module %s declined with %d\n",327 module->name, ret);328 list_del(&intf_modpriv->intf_list);329 devm_kfree(dev, intf_modpriv);330 continue;331 }332 }333 334 /* Now register the interface with netdev */335 list_for_each_entry(netcp_intf,336 &netcp_device->interface_head,337 interface_list) {338 /* If interface not registered then register now */339 if (!netcp_intf->netdev_registered) {340 ret = netcp_register_interface(netcp_intf);341 if (ret)342 return -ENODEV;343 }344 }345 return 0;346}347 348int netcp_register_module(struct netcp_module *module)349{350 struct netcp_device *netcp_device;351 struct netcp_module *tmp;352 int ret;353 354 if (!module->name) {355 WARN(1, "error registering netcp module: no name\n");356 return -EINVAL;357 }358 359 if (!module->probe) {360 WARN(1, "error registering netcp module: no probe\n");361 return -EINVAL;362 }363 364 mutex_lock(&netcp_modules_lock);365 366 for_each_netcp_module(tmp) {367 if (!strcasecmp(tmp->name, module->name)) {368 mutex_unlock(&netcp_modules_lock);369 return -EEXIST;370 }371 }372 list_add_tail(&module->module_list, &netcp_modules);373 374 list_for_each_entry(netcp_device, &netcp_devices, device_list) {375 ret = netcp_module_probe(netcp_device, module);376 if (ret < 0)377 goto fail;378 }379 mutex_unlock(&netcp_modules_lock);380 return 0;381 382fail:383 mutex_unlock(&netcp_modules_lock);384 netcp_unregister_module(module);385 return ret;386}387EXPORT_SYMBOL_GPL(netcp_register_module);388 389static void netcp_release_module(struct netcp_device *netcp_device,390 struct netcp_module *module)391{392 struct netcp_inst_modpriv *inst_modpriv, *inst_tmp;393 struct netcp_intf *netcp_intf, *netcp_tmp;394 struct device *dev = netcp_device->device;395 396 /* Release the module from each interface */397 list_for_each_entry_safe(netcp_intf, netcp_tmp,398 &netcp_device->interface_head,399 interface_list) {400 struct netcp_intf_modpriv *intf_modpriv, *intf_tmp;401 402 list_for_each_entry_safe(intf_modpriv, intf_tmp,403 &netcp_intf->module_head,404 intf_list) {405 if (intf_modpriv->netcp_module == module) {406 module->release(intf_modpriv->module_priv);407 list_del(&intf_modpriv->intf_list);408 devm_kfree(dev, intf_modpriv);409 break;410 }411 }412 }413 414 /* Remove the module from each instance */415 list_for_each_entry_safe(inst_modpriv, inst_tmp,416 &netcp_device->modpriv_head, inst_list) {417 if (inst_modpriv->netcp_module == module) {418 module->remove(netcp_device,419 inst_modpriv->module_priv);420 list_del(&inst_modpriv->inst_list);421 devm_kfree(dev, inst_modpriv);422 break;423 }424 }425}426 427void netcp_unregister_module(struct netcp_module *module)428{429 struct netcp_device *netcp_device;430 struct netcp_module *module_tmp;431 432 mutex_lock(&netcp_modules_lock);433 434 list_for_each_entry(netcp_device, &netcp_devices, device_list) {435 netcp_release_module(netcp_device, module);436 }437 438 /* Remove the module from the module list */439 for_each_netcp_module(module_tmp) {440 if (module == module_tmp) {441 list_del(&module->module_list);442 break;443 }444 }445 446 mutex_unlock(&netcp_modules_lock);447}448EXPORT_SYMBOL_GPL(netcp_unregister_module);449 450void *netcp_module_get_intf_data(struct netcp_module *module,451 struct netcp_intf *intf)452{453 struct netcp_intf_modpriv *intf_modpriv;454 455 list_for_each_entry(intf_modpriv, &intf->module_head, intf_list)456 if (intf_modpriv->netcp_module == module)457 return intf_modpriv->module_priv;458 return NULL;459}460EXPORT_SYMBOL_GPL(netcp_module_get_intf_data);461 462/* Module TX and RX Hook management */463struct netcp_hook_list {464 struct list_head list;465 netcp_hook_rtn *hook_rtn;466 void *hook_data;467 int order;468};469 470int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,471 netcp_hook_rtn *hook_rtn, void *hook_data)472{473 struct netcp_hook_list *entry;474 struct netcp_hook_list *next;475 unsigned long flags;476 477 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);478 if (!entry)479 return -ENOMEM;480 481 entry->hook_rtn = hook_rtn;482 entry->hook_data = hook_data;483 entry->order = order;484 485 spin_lock_irqsave(&netcp_priv->lock, flags);486 list_for_each_entry(next, &netcp_priv->txhook_list_head, list) {487 if (next->order > order)488 break;489 }490 __list_add(&entry->list, next->list.prev, &next->list);491 spin_unlock_irqrestore(&netcp_priv->lock, flags);492 493 return 0;494}495EXPORT_SYMBOL_GPL(netcp_register_txhook);496 497int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,498 netcp_hook_rtn *hook_rtn, void *hook_data)499{500 struct netcp_hook_list *next, *n;501 unsigned long flags;502 503 spin_lock_irqsave(&netcp_priv->lock, flags);504 list_for_each_entry_safe(next, n, &netcp_priv->txhook_list_head, list) {505 if ((next->order == order) &&506 (next->hook_rtn == hook_rtn) &&507 (next->hook_data == hook_data)) {508 list_del(&next->list);509 spin_unlock_irqrestore(&netcp_priv->lock, flags);510 devm_kfree(netcp_priv->dev, next);511 return 0;512 }513 }514 spin_unlock_irqrestore(&netcp_priv->lock, flags);515 return -ENOENT;516}517EXPORT_SYMBOL_GPL(netcp_unregister_txhook);518 519int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,520 netcp_hook_rtn *hook_rtn, void *hook_data)521{522 struct netcp_hook_list *entry;523 struct netcp_hook_list *next;524 unsigned long flags;525 526 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);527 if (!entry)528 return -ENOMEM;529 530 entry->hook_rtn = hook_rtn;531 entry->hook_data = hook_data;532 entry->order = order;533 534 spin_lock_irqsave(&netcp_priv->lock, flags);535 list_for_each_entry(next, &netcp_priv->rxhook_list_head, list) {536 if (next->order > order)537 break;538 }539 __list_add(&entry->list, next->list.prev, &next->list);540 spin_unlock_irqrestore(&netcp_priv->lock, flags);541 542 return 0;543}544EXPORT_SYMBOL_GPL(netcp_register_rxhook);545 546int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,547 netcp_hook_rtn *hook_rtn, void *hook_data)548{549 struct netcp_hook_list *next, *n;550 unsigned long flags;551 552 spin_lock_irqsave(&netcp_priv->lock, flags);553 list_for_each_entry_safe(next, n, &netcp_priv->rxhook_list_head, list) {554 if ((next->order == order) &&555 (next->hook_rtn == hook_rtn) &&556 (next->hook_data == hook_data)) {557 list_del(&next->list);558 spin_unlock_irqrestore(&netcp_priv->lock, flags);559 devm_kfree(netcp_priv->dev, next);560 return 0;561 }562 }563 spin_unlock_irqrestore(&netcp_priv->lock, flags);564 565 return -ENOENT;566}567EXPORT_SYMBOL_GPL(netcp_unregister_rxhook);568 569static void netcp_frag_free(bool is_frag, void *ptr)570{571 if (is_frag)572 skb_free_frag(ptr);573 else574 kfree(ptr);575}576 577static void netcp_free_rx_desc_chain(struct netcp_intf *netcp,578 struct knav_dma_desc *desc)579{580 struct knav_dma_desc *ndesc;581 dma_addr_t dma_desc, dma_buf;582 unsigned int buf_len, dma_sz = sizeof(*ndesc);583 void *buf_ptr;584 u32 tmp;585 586 get_words(&dma_desc, 1, &desc->next_desc);587 588 while (dma_desc) {589 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);590 if (unlikely(!ndesc)) {591 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");592 break;593 }594 get_pkt_info(&dma_buf, &tmp, &dma_desc, ndesc);595 /* warning!!!! We are retrieving the virtual ptr in the sw_data596 * field as a 32bit value. Will not work on 64bit machines597 */598 buf_ptr = (void *)GET_SW_DATA0(ndesc);599 buf_len = (int)GET_SW_DATA1(desc);600 dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE);601 __free_page(buf_ptr);602 knav_pool_desc_put(netcp->rx_pool, desc);603 }604 /* warning!!!! We are retrieving the virtual ptr in the sw_data605 * field as a 32bit value. Will not work on 64bit machines606 */607 buf_ptr = (void *)GET_SW_DATA0(desc);608 buf_len = (int)GET_SW_DATA1(desc);609 610 if (buf_ptr)611 netcp_frag_free(buf_len <= PAGE_SIZE, buf_ptr);612 knav_pool_desc_put(netcp->rx_pool, desc);613}614 615static void netcp_empty_rx_queue(struct netcp_intf *netcp)616{617 struct netcp_stats *rx_stats = &netcp->stats;618 struct knav_dma_desc *desc;619 unsigned int dma_sz;620 dma_addr_t dma;621 622 for (; ;) {623 dma = knav_queue_pop(netcp->rx_queue, &dma_sz);624 if (!dma)625 break;626 627 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);628 if (unlikely(!desc)) {629 dev_err(netcp->ndev_dev, "%s: failed to unmap Rx desc\n",630 __func__);631 rx_stats->rx_errors++;632 continue;633 }634 netcp_free_rx_desc_chain(netcp, desc);635 rx_stats->rx_dropped++;636 }637}638 639static int netcp_process_one_rx_packet(struct netcp_intf *netcp)640{641 struct netcp_stats *rx_stats = &netcp->stats;642 unsigned int dma_sz, buf_len, org_buf_len;643 struct knav_dma_desc *desc, *ndesc;644 unsigned int pkt_sz = 0, accum_sz;645 struct netcp_hook_list *rx_hook;646 dma_addr_t dma_desc, dma_buff;647 struct netcp_packet p_info;648 struct sk_buff *skb;649 void *org_buf_ptr;650 u32 tmp;651 652 dma_desc = knav_queue_pop(netcp->rx_queue, &dma_sz);653 if (!dma_desc)654 return -1;655 656 desc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);657 if (unlikely(!desc)) {658 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");659 return 0;660 }661 662 get_pkt_info(&dma_buff, &buf_len, &dma_desc, desc);663 /* warning!!!! We are retrieving the virtual ptr in the sw_data664 * field as a 32bit value. Will not work on 64bit machines665 */666 org_buf_ptr = (void *)GET_SW_DATA0(desc);667 org_buf_len = (int)GET_SW_DATA1(desc);668 669 if (unlikely(!org_buf_ptr)) {670 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");671 goto free_desc;672 }673 674 pkt_sz &= KNAV_DMA_DESC_PKT_LEN_MASK;675 accum_sz = buf_len;676 dma_unmap_single(netcp->dev, dma_buff, buf_len, DMA_FROM_DEVICE);677 678 /* Build a new sk_buff for the primary buffer */679 skb = build_skb(org_buf_ptr, org_buf_len);680 if (unlikely(!skb)) {681 dev_err(netcp->ndev_dev, "build_skb() failed\n");682 goto free_desc;683 }684 685 /* update data, tail and len */686 skb_reserve(skb, NETCP_SOP_OFFSET);687 __skb_put(skb, buf_len);688 689 /* Fill in the page fragment list */690 while (dma_desc) {691 struct page *page;692 693 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);694 if (unlikely(!ndesc)) {695 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");696 goto free_desc;697 }698 699 get_pkt_info(&dma_buff, &buf_len, &dma_desc, ndesc);700 /* warning!!!! We are retrieving the virtual ptr in the sw_data701 * field as a 32bit value. Will not work on 64bit machines702 */703 page = (struct page *)GET_SW_DATA0(ndesc);704 705 if (likely(dma_buff && buf_len && page)) {706 dma_unmap_page(netcp->dev, dma_buff, PAGE_SIZE,707 DMA_FROM_DEVICE);708 } else {709 dev_err(netcp->ndev_dev, "Bad Rx desc dma_buff(%pad), len(%d), page(%p)\n",710 &dma_buff, buf_len, page);711 goto free_desc;712 }713 714 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,715 offset_in_page(dma_buff), buf_len, PAGE_SIZE);716 accum_sz += buf_len;717 718 /* Free the descriptor */719 knav_pool_desc_put(netcp->rx_pool, ndesc);720 }721 722 /* check for packet len and warn */723 if (unlikely(pkt_sz != accum_sz))724 dev_dbg(netcp->ndev_dev, "mismatch in packet size(%d) & sum of fragments(%d)\n",725 pkt_sz, accum_sz);726 727 /* Newer version of the Ethernet switch can trim the Ethernet FCS728 * from the packet and is indicated in hw_cap. So trim it only for729 * older h/w730 */731 if (!(netcp->hw_cap & ETH_SW_CAN_REMOVE_ETH_FCS))732 __pskb_trim(skb, skb->len - ETH_FCS_LEN);733 734 /* Call each of the RX hooks */735 p_info.skb = skb;736 skb->dev = netcp->ndev;737 p_info.rxtstamp_complete = false;738 get_desc_info(&tmp, &p_info.eflags, desc);739 p_info.epib = desc->epib;740 p_info.psdata = (u32 __force *)desc->psdata;741 p_info.eflags = ((p_info.eflags >> KNAV_DMA_DESC_EFLAGS_SHIFT) &742 KNAV_DMA_DESC_EFLAGS_MASK);743 list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) {744 int ret;745 746 ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data,747 &p_info);748 if (unlikely(ret)) {749 dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n",750 rx_hook->order, ret);751 /* Free the primary descriptor */752 rx_stats->rx_dropped++;753 knav_pool_desc_put(netcp->rx_pool, desc);754 dev_kfree_skb(skb);755 return 0;756 }757 }758 /* Free the primary descriptor */759 knav_pool_desc_put(netcp->rx_pool, desc);760 761 u64_stats_update_begin(&rx_stats->syncp_rx);762 rx_stats->rx_packets++;763 rx_stats->rx_bytes += skb->len;764 u64_stats_update_end(&rx_stats->syncp_rx);765 766 /* push skb up the stack */767 skb->protocol = eth_type_trans(skb, netcp->ndev);768 netif_receive_skb(skb);769 return 0;770 771free_desc:772 netcp_free_rx_desc_chain(netcp, desc);773 rx_stats->rx_errors++;774 return 0;775}776 777static int netcp_process_rx_packets(struct netcp_intf *netcp,778 unsigned int budget)779{780 int i;781 782 for (i = 0; (i < budget) && !netcp_process_one_rx_packet(netcp); i++)783 ;784 return i;785}786 787/* Release descriptors and attached buffers from Rx FDQ */788static void netcp_free_rx_buf(struct netcp_intf *netcp, int fdq)789{790 struct knav_dma_desc *desc;791 unsigned int buf_len, dma_sz;792 dma_addr_t dma;793 void *buf_ptr;794 795 /* Allocate descriptor */796 while ((dma = knav_queue_pop(netcp->rx_fdq[fdq], &dma_sz))) {797 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);798 if (unlikely(!desc)) {799 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");800 continue;801 }802 803 get_org_pkt_info(&dma, &buf_len, desc);804 /* warning!!!! We are retrieving the virtual ptr in the sw_data805 * field as a 32bit value. Will not work on 64bit machines806 */807 buf_ptr = (void *)GET_SW_DATA0(desc);808 809 if (unlikely(!dma)) {810 dev_err(netcp->ndev_dev, "NULL orig_buff in desc\n");811 knav_pool_desc_put(netcp->rx_pool, desc);812 continue;813 }814 815 if (unlikely(!buf_ptr)) {816 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");817 knav_pool_desc_put(netcp->rx_pool, desc);818 continue;819 }820 821 if (fdq == 0) {822 dma_unmap_single(netcp->dev, dma, buf_len,823 DMA_FROM_DEVICE);824 netcp_frag_free((buf_len <= PAGE_SIZE), buf_ptr);825 } else {826 dma_unmap_page(netcp->dev, dma, buf_len,827 DMA_FROM_DEVICE);828 __free_page(buf_ptr);829 }830 831 knav_pool_desc_put(netcp->rx_pool, desc);832 }833}834 835static void netcp_rxpool_free(struct netcp_intf *netcp)836{837 int i;838 839 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&840 !IS_ERR_OR_NULL(netcp->rx_fdq[i]); i++)841 netcp_free_rx_buf(netcp, i);842 843 if (knav_pool_count(netcp->rx_pool) != netcp->rx_pool_size)844 dev_err(netcp->ndev_dev, "Lost Rx (%d) descriptors\n",845 netcp->rx_pool_size - knav_pool_count(netcp->rx_pool));846 847 knav_pool_destroy(netcp->rx_pool);848 netcp->rx_pool = NULL;849}850 851static int netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq)852{853 struct knav_dma_desc *hwdesc;854 unsigned int buf_len, dma_sz;855 u32 desc_info, pkt_info;856 struct page *page;857 dma_addr_t dma;858 void *bufptr;859 u32 sw_data[2];860 861 /* Allocate descriptor */862 hwdesc = knav_pool_desc_get(netcp->rx_pool);863 if (IS_ERR_OR_NULL(hwdesc)) {864 dev_dbg(netcp->ndev_dev, "out of rx pool desc\n");865 return -ENOMEM;866 }867 868 if (likely(fdq == 0)) {869 unsigned int primary_buf_len;870 /* Allocate a primary receive queue entry */871 buf_len = NETCP_PACKET_SIZE + NETCP_SOP_OFFSET;872 primary_buf_len = SKB_DATA_ALIGN(buf_len) +873 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));874 875 bufptr = netdev_alloc_frag(primary_buf_len);876 sw_data[1] = primary_buf_len;877 878 if (unlikely(!bufptr)) {879 dev_warn_ratelimited(netcp->ndev_dev,880 "Primary RX buffer alloc failed\n");881 goto fail;882 }883 dma = dma_map_single(netcp->dev, bufptr, buf_len,884 DMA_TO_DEVICE);885 if (unlikely(dma_mapping_error(netcp->dev, dma)))886 goto fail;887 888 /* warning!!!! We are saving the virtual ptr in the sw_data889 * field as a 32bit value. Will not work on 64bit machines890 */891 sw_data[0] = (u32)bufptr;892 } else {893 /* Allocate a secondary receive queue entry */894 page = alloc_page(GFP_ATOMIC | GFP_DMA);895 if (unlikely(!page)) {896 dev_warn_ratelimited(netcp->ndev_dev, "Secondary page alloc failed\n");897 goto fail;898 }899 buf_len = PAGE_SIZE;900 dma = dma_map_page(netcp->dev, page, 0, buf_len, DMA_TO_DEVICE);901 /* warning!!!! We are saving the virtual ptr in the sw_data902 * field as a 32bit value. Will not work on 64bit machines903 */904 sw_data[0] = (u32)page;905 sw_data[1] = 0;906 }907 908 desc_info = KNAV_DMA_DESC_PS_INFO_IN_DESC;909 desc_info |= buf_len & KNAV_DMA_DESC_PKT_LEN_MASK;910 pkt_info = KNAV_DMA_DESC_HAS_EPIB;911 pkt_info |= KNAV_DMA_NUM_PS_WORDS << KNAV_DMA_DESC_PSLEN_SHIFT;912 pkt_info |= (netcp->rx_queue_id & KNAV_DMA_DESC_RETQ_MASK) <<913 KNAV_DMA_DESC_RETQ_SHIFT;914 set_org_pkt_info(dma, buf_len, hwdesc);915 SET_SW_DATA0(sw_data[0], hwdesc);916 SET_SW_DATA1(sw_data[1], hwdesc);917 set_desc_info(desc_info, pkt_info, hwdesc);918 919 /* Push to FDQs */920 knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma,921 &dma_sz);922 knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0);923 return 0;924 925fail:926 knav_pool_desc_put(netcp->rx_pool, hwdesc);927 return -ENOMEM;928}929 930/* Refill Rx FDQ with descriptors & attached buffers */931static void netcp_rxpool_refill(struct netcp_intf *netcp)932{933 u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0};934 int i, ret = 0;935 936 /* Calculate the FDQ deficit and refill */937 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) {938 fdq_deficit[i] = netcp->rx_queue_depths[i] -939 knav_queue_get_count(netcp->rx_fdq[i]);940 941 while (fdq_deficit[i]-- && !ret)942 ret = netcp_allocate_rx_buf(netcp, i);943 } /* end for fdqs */944}945 946/* NAPI poll */947static int netcp_rx_poll(struct napi_struct *napi, int budget)948{949 struct netcp_intf *netcp = container_of(napi, struct netcp_intf,950 rx_napi);951 unsigned int packets;952 953 packets = netcp_process_rx_packets(netcp, budget);954 955 netcp_rxpool_refill(netcp);956 if (packets < budget) {957 napi_complete_done(&netcp->rx_napi, packets);958 knav_queue_enable_notify(netcp->rx_queue);959 }960 961 return packets;962}963 964static void netcp_rx_notify(void *arg)965{966 struct netcp_intf *netcp = arg;967 968 knav_queue_disable_notify(netcp->rx_queue);969 napi_schedule(&netcp->rx_napi);970}971 972static void netcp_free_tx_desc_chain(struct netcp_intf *netcp,973 struct knav_dma_desc *desc,974 unsigned int desc_sz)975{976 struct knav_dma_desc *ndesc = desc;977 dma_addr_t dma_desc, dma_buf;978 unsigned int buf_len;979 980 while (ndesc) {981 get_pkt_info(&dma_buf, &buf_len, &dma_desc, ndesc);982 983 if (dma_buf && buf_len)984 dma_unmap_single(netcp->dev, dma_buf, buf_len,985 DMA_TO_DEVICE);986 else987 dev_warn(netcp->ndev_dev, "bad Tx desc buf(%pad), len(%d)\n",988 &dma_buf, buf_len);989 990 knav_pool_desc_put(netcp->tx_pool, ndesc);991 ndesc = NULL;992 if (dma_desc) {993 ndesc = knav_pool_desc_unmap(netcp->tx_pool, dma_desc,994 desc_sz);995 if (!ndesc)996 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");997 }998 }999}1000 1001static int netcp_process_tx_compl_packets(struct netcp_intf *netcp,1002 unsigned int budget)1003{1004 struct netcp_stats *tx_stats = &netcp->stats;1005 struct knav_dma_desc *desc;1006 struct netcp_tx_cb *tx_cb;1007 struct sk_buff *skb;1008 unsigned int dma_sz;1009 dma_addr_t dma;1010 int pkts = 0;1011 1012 while (budget--) {1013 dma = knav_queue_pop(netcp->tx_compl_q, &dma_sz);1014 if (!dma)1015 break;1016 desc = knav_pool_desc_unmap(netcp->tx_pool, dma, dma_sz);1017 if (unlikely(!desc)) {1018 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");1019 tx_stats->tx_errors++;1020 continue;1021 }1022 1023 /* warning!!!! We are retrieving the virtual ptr in the sw_data1024 * field as a 32bit value. Will not work on 64bit machines1025 */1026 skb = (struct sk_buff *)GET_SW_DATA0(desc);1027 netcp_free_tx_desc_chain(netcp, desc, dma_sz);1028 if (!skb) {1029 dev_err(netcp->ndev_dev, "No skb in Tx desc\n");1030 tx_stats->tx_errors++;1031 continue;1032 }1033 1034 tx_cb = (struct netcp_tx_cb *)skb->cb;1035 if (tx_cb->txtstamp)1036 tx_cb->txtstamp(tx_cb->ts_context, skb);1037 1038 if (netif_subqueue_stopped(netcp->ndev, skb) &&1039 netif_running(netcp->ndev) &&1040 (knav_pool_count(netcp->tx_pool) >1041 netcp->tx_resume_threshold)) {1042 u16 subqueue = skb_get_queue_mapping(skb);1043 1044 netif_wake_subqueue(netcp->ndev, subqueue);1045 }1046 1047 u64_stats_update_begin(&tx_stats->syncp_tx);1048 tx_stats->tx_packets++;1049 tx_stats->tx_bytes += skb->len;1050 u64_stats_update_end(&tx_stats->syncp_tx);1051 dev_kfree_skb(skb);1052 pkts++;1053 }1054 return pkts;1055}1056 1057static int netcp_tx_poll(struct napi_struct *napi, int budget)1058{1059 int packets;1060 struct netcp_intf *netcp = container_of(napi, struct netcp_intf,1061 tx_napi);1062 1063 packets = netcp_process_tx_compl_packets(netcp, budget);1064 if (packets < budget) {1065 napi_complete(&netcp->tx_napi);1066 knav_queue_enable_notify(netcp->tx_compl_q);1067 }1068 1069 return packets;1070}1071 1072static void netcp_tx_notify(void *arg)1073{1074 struct netcp_intf *netcp = arg;1075 1076 knav_queue_disable_notify(netcp->tx_compl_q);1077 napi_schedule(&netcp->tx_napi);1078}1079 1080static struct knav_dma_desc*1081netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp)1082{1083 struct knav_dma_desc *desc, *ndesc, *pdesc;1084 unsigned int pkt_len = skb_headlen(skb);1085 struct device *dev = netcp->dev;1086 dma_addr_t dma_addr;1087 unsigned int dma_sz;1088 int i;1089 1090 /* Map the linear buffer */1091 dma_addr = dma_map_single(dev, skb->data, pkt_len, DMA_TO_DEVICE);1092 if (unlikely(dma_mapping_error(dev, dma_addr))) {1093 dev_err(netcp->ndev_dev, "Failed to map skb buffer\n");1094 return NULL;1095 }1096 1097 desc = knav_pool_desc_get(netcp->tx_pool);1098 if (IS_ERR_OR_NULL(desc)) {1099 dev_err(netcp->ndev_dev, "out of TX desc\n");1100 dma_unmap_single(dev, dma_addr, pkt_len, DMA_TO_DEVICE);1101 return NULL;1102 }1103 1104 set_pkt_info(dma_addr, pkt_len, 0, desc);1105 if (skb_is_nonlinear(skb)) {1106 prefetchw(skb_shinfo(skb));1107 } else {1108 desc->next_desc = 0;1109 goto upd_pkt_len;1110 }1111 1112 pdesc = desc;1113 1114 /* Handle the case where skb is fragmented in pages */1115 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {1116 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];1117 struct page *page = skb_frag_page(frag);1118 u32 page_offset = skb_frag_off(frag);1119 u32 buf_len = skb_frag_size(frag);1120 dma_addr_t desc_dma;1121 u32 desc_dma_32;1122 1123 dma_addr = dma_map_page(dev, page, page_offset, buf_len,1124 DMA_TO_DEVICE);1125 if (unlikely(!dma_addr)) {1126 dev_err(netcp->ndev_dev, "Failed to map skb page\n");1127 goto free_descs;1128 }1129 1130 ndesc = knav_pool_desc_get(netcp->tx_pool);1131 if (IS_ERR_OR_NULL(ndesc)) {1132 dev_err(netcp->ndev_dev, "out of TX desc for frags\n");1133 dma_unmap_page(dev, dma_addr, buf_len, DMA_TO_DEVICE);1134 goto free_descs;1135 }1136 1137 desc_dma = knav_pool_desc_virt_to_dma(netcp->tx_pool, ndesc);1138 set_pkt_info(dma_addr, buf_len, 0, ndesc);1139 desc_dma_32 = (u32)desc_dma;1140 set_words(&desc_dma_32, 1, &pdesc->next_desc);1141 pkt_len += buf_len;1142 if (pdesc != desc)1143 knav_pool_desc_map(netcp->tx_pool, pdesc,1144 sizeof(*pdesc), &desc_dma, &dma_sz);1145 pdesc = ndesc;1146 }1147 if (pdesc != desc)1148 knav_pool_desc_map(netcp->tx_pool, pdesc, sizeof(*pdesc),1149 &dma_addr, &dma_sz);1150 1151 /* frag list based linkage is not supported for now. */1152 if (skb_shinfo(skb)->frag_list) {1153 dev_err_ratelimited(netcp->ndev_dev, "NETIF_F_FRAGLIST not supported\n");1154 goto free_descs;1155 }1156 1157upd_pkt_len:1158 WARN_ON(pkt_len != skb->len);1159 1160 pkt_len &= KNAV_DMA_DESC_PKT_LEN_MASK;1161 set_words(&pkt_len, 1, &desc->desc_info);1162 return desc;1163 1164free_descs:1165 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));1166 return NULL;1167}1168 1169static int netcp_tx_submit_skb(struct netcp_intf *netcp,1170 struct sk_buff *skb,1171 struct knav_dma_desc *desc)1172{1173 struct netcp_tx_pipe *tx_pipe = NULL;1174 struct netcp_hook_list *tx_hook;1175 struct netcp_packet p_info;1176 struct netcp_tx_cb *tx_cb;1177 unsigned int dma_sz;1178 dma_addr_t dma;1179 u32 tmp = 0;1180 int ret = 0;1181 1182 p_info.netcp = netcp;1183 p_info.skb = skb;1184 p_info.tx_pipe = NULL;1185 p_info.psdata_len = 0;1186 p_info.ts_context = NULL;1187 p_info.txtstamp = NULL;1188 p_info.epib = desc->epib;1189 p_info.psdata = (u32 __force *)desc->psdata;1190 memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(__le32));1191 1192 /* Find out where to inject the packet for transmission */1193 list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) {1194 ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data,1195 &p_info);1196 if (unlikely(ret != 0)) {1197 dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n",1198 tx_hook->order, ret);1199 ret = (ret < 0) ? ret : NETDEV_TX_OK;1200 goto out;1201 }1202 }1203 1204 /* Make sure some TX hook claimed the packet */1205 tx_pipe = p_info.tx_pipe;1206 if (!tx_pipe) {1207 dev_err(netcp->ndev_dev, "No TX hook claimed the packet!\n");1208 ret = -ENXIO;1209 goto out;1210 }1211 1212 tx_cb = (struct netcp_tx_cb *)skb->cb;1213 tx_cb->ts_context = p_info.ts_context;1214 tx_cb->txtstamp = p_info.txtstamp;1215 1216 /* update descriptor */1217 if (p_info.psdata_len) {1218 /* psdata points to both native-endian and device-endian data */1219 __le32 *psdata = (void __force *)p_info.psdata;1220 1221 set_words((u32 *)psdata +1222 (KNAV_DMA_NUM_PS_WORDS - p_info.psdata_len),1223 p_info.psdata_len, psdata);1224 tmp |= (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) <<1225 KNAV_DMA_DESC_PSLEN_SHIFT;1226 }1227 1228 tmp |= KNAV_DMA_DESC_HAS_EPIB |1229 ((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<1230 KNAV_DMA_DESC_RETQ_SHIFT);1231 1232 if (!(tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO)) {1233 tmp |= ((tx_pipe->switch_to_port & KNAV_DMA_DESC_PSFLAG_MASK) <<1234 KNAV_DMA_DESC_PSFLAG_SHIFT);1235 }1236 1237 set_words(&tmp, 1, &desc->packet_info);1238 /* warning!!!! We are saving the virtual ptr in the sw_data1239 * field as a 32bit value. Will not work on 64bit machines1240 */1241 SET_SW_DATA0((u32)skb, desc);1242 1243 if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) {1244 tmp = tx_pipe->switch_to_port;1245 set_words(&tmp, 1, &desc->tag_info);1246 }1247 1248 /* submit packet descriptor */1249 ret = knav_pool_desc_map(netcp->tx_pool, desc, sizeof(*desc), &dma,1250 &dma_sz);1251 if (unlikely(ret)) {1252 dev_err(netcp->ndev_dev, "%s() failed to map desc\n", __func__);1253 ret = -ENOMEM;1254 goto out;1255 }1256 skb_tx_timestamp(skb);1257 knav_queue_push(tx_pipe->dma_queue, dma, dma_sz, 0);1258 1259out:1260 return ret;1261}1262 1263/* Submit the packet */1264static netdev_tx_t netcp_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev)1265{1266 struct netcp_intf *netcp = netdev_priv(ndev);1267 struct netcp_stats *tx_stats = &netcp->stats;1268 int subqueue = skb_get_queue_mapping(skb);1269 struct knav_dma_desc *desc;1270 int desc_count, ret = 0;1271 1272 if (unlikely(skb->len <= 0)) {1273 dev_kfree_skb(skb);1274 return NETDEV_TX_OK;1275 }1276 1277 if (unlikely(skb->len < NETCP_MIN_PACKET_SIZE)) {1278 ret = skb_padto(skb, NETCP_MIN_PACKET_SIZE);1279 if (ret < 0) {1280 /* If we get here, the skb has already been dropped */1281 dev_warn(netcp->ndev_dev, "padding failed (%d), packet dropped\n",1282 ret);1283 tx_stats->tx_dropped++;1284 return ret;1285 }1286 skb->len = NETCP_MIN_PACKET_SIZE;1287 }1288 1289 desc = netcp_tx_map_skb(skb, netcp);1290 if (unlikely(!desc)) {1291 netif_stop_subqueue(ndev, subqueue);1292 ret = -ENOBUFS;1293 goto drop;1294 }1295 1296 ret = netcp_tx_submit_skb(netcp, skb, desc);1297 if (ret)1298 goto drop;1299 1300 /* Check Tx pool count & stop subqueue if needed */1301 desc_count = knav_pool_count(netcp->tx_pool);1302 if (desc_count < netcp->tx_pause_threshold) {1303 dev_dbg(netcp->ndev_dev, "pausing tx, count(%d)\n", desc_count);1304 netif_stop_subqueue(ndev, subqueue);1305 }1306 return NETDEV_TX_OK;1307 1308drop:1309 tx_stats->tx_dropped++;1310 if (desc)1311 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));1312 dev_kfree_skb(skb);1313 return ret;1314}1315 1316int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe)1317{1318 if (tx_pipe->dma_channel) {1319 knav_dma_close_channel(tx_pipe->dma_channel);1320 tx_pipe->dma_channel = NULL;1321 }1322 return 0;1323}1324EXPORT_SYMBOL_GPL(netcp_txpipe_close);1325 1326int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe)1327{1328 struct device *dev = tx_pipe->netcp_device->device;1329 struct knav_dma_cfg config;1330 int ret = 0;1331 u8 name[16];1332 1333 memset(&config, 0, sizeof(config));1334 config.direction = DMA_MEM_TO_DEV;1335 config.u.tx.filt_einfo = false;1336 config.u.tx.filt_pswords = false;1337 config.u.tx.priority = DMA_PRIO_MED_L;1338 1339 tx_pipe->dma_channel = knav_dma_open_channel(dev,1340 tx_pipe->dma_chan_name, &config);1341 if (IS_ERR(tx_pipe->dma_channel)) {1342 dev_err(dev, "failed opening tx chan(%s)\n",1343 tx_pipe->dma_chan_name);1344 ret = PTR_ERR(tx_pipe->dma_channel);1345 goto err;1346 }1347 1348 snprintf(name, sizeof(name), "tx-pipe-%s", dev_name(dev));1349 tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id,1350 KNAV_QUEUE_SHARED);1351 if (IS_ERR(tx_pipe->dma_queue)) {1352 dev_err(dev, "Could not open DMA queue for channel \"%s\": %pe\n",1353 name, tx_pipe->dma_queue);1354 ret = PTR_ERR(tx_pipe->dma_queue);1355 goto err;1356 }1357 1358 dev_dbg(dev, "opened tx pipe %s\n", name);1359 return 0;1360 1361err:1362 if (!IS_ERR_OR_NULL(tx_pipe->dma_channel))1363 knav_dma_close_channel(tx_pipe->dma_channel);1364 tx_pipe->dma_channel = NULL;1365 return ret;1366}1367EXPORT_SYMBOL_GPL(netcp_txpipe_open);1368 1369int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,1370 struct netcp_device *netcp_device,1371 const char *dma_chan_name, unsigned int dma_queue_id)1372{1373 memset(tx_pipe, 0, sizeof(*tx_pipe));1374 tx_pipe->netcp_device = netcp_device;1375 tx_pipe->dma_chan_name = dma_chan_name;1376 tx_pipe->dma_queue_id = dma_queue_id;1377 return 0;1378}1379EXPORT_SYMBOL_GPL(netcp_txpipe_init);1380 1381static struct netcp_addr *netcp_addr_find(struct netcp_intf *netcp,1382 const u8 *addr,1383 enum netcp_addr_type type)1384{1385 struct netcp_addr *naddr;1386 1387 list_for_each_entry(naddr, &netcp->addr_list, node) {1388 if (naddr->type != type)1389 continue;1390 if (addr && memcmp(addr, naddr->addr, ETH_ALEN))1391 continue;1392 return naddr;1393 }1394 1395 return NULL;1396}1397 1398static struct netcp_addr *netcp_addr_add(struct netcp_intf *netcp,1399 const u8 *addr,1400 enum netcp_addr_type type)1401{1402 struct netcp_addr *naddr;1403 1404 naddr = devm_kmalloc(netcp->dev, sizeof(*naddr), GFP_ATOMIC);1405 if (!naddr)1406 return NULL;1407 1408 naddr->type = type;1409 naddr->flags = 0;1410 naddr->netcp = netcp;1411 if (addr)1412 ether_addr_copy(naddr->addr, addr);1413 else1414 eth_zero_addr(naddr->addr);1415 list_add_tail(&naddr->node, &netcp->addr_list);1416 1417 return naddr;1418}1419 1420static void netcp_addr_del(struct netcp_intf *netcp, struct netcp_addr *naddr)1421{1422 list_del(&naddr->node);1423 devm_kfree(netcp->dev, naddr);1424}1425 1426static void netcp_addr_clear_mark(struct netcp_intf *netcp)1427{1428 struct netcp_addr *naddr;1429 1430 list_for_each_entry(naddr, &netcp->addr_list, node)1431 naddr->flags = 0;1432}1433 1434static void netcp_addr_add_mark(struct netcp_intf *netcp, const u8 *addr,1435 enum netcp_addr_type type)1436{1437 struct netcp_addr *naddr;1438 1439 naddr = netcp_addr_find(netcp, addr, type);1440 if (naddr) {1441 naddr->flags |= ADDR_VALID;1442 return;1443 }1444 1445 naddr = netcp_addr_add(netcp, addr, type);1446 if (!WARN_ON(!naddr))1447 naddr->flags |= ADDR_NEW;1448}1449 1450static void netcp_addr_sweep_del(struct netcp_intf *netcp)1451{1452 struct netcp_addr *naddr, *tmp;1453 struct netcp_intf_modpriv *priv;1454 struct netcp_module *module;1455 int error;1456 1457 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {1458 if (naddr->flags & (ADDR_VALID | ADDR_NEW))1459 continue;1460 dev_dbg(netcp->ndev_dev, "deleting address %pM, type %x\n",1461 naddr->addr, naddr->type);1462 for_each_module(netcp, priv) {1463 module = priv->netcp_module;1464 if (!module->del_addr)1465 continue;1466 error = module->del_addr(priv->module_priv,1467 naddr);1468 WARN_ON(error);1469 }1470 netcp_addr_del(netcp, naddr);1471 }1472}1473 1474static void netcp_addr_sweep_add(struct netcp_intf *netcp)1475{1476 struct netcp_addr *naddr, *tmp;1477 struct netcp_intf_modpriv *priv;1478 struct netcp_module *module;1479 int error;1480 1481 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {1482 if (!(naddr->flags & ADDR_NEW))1483 continue;1484 dev_dbg(netcp->ndev_dev, "adding address %pM, type %x\n",1485 naddr->addr, naddr->type);1486 1487 for_each_module(netcp, priv) {1488 module = priv->netcp_module;1489 if (!module->add_addr)1490 continue;1491 error = module->add_addr(priv->module_priv, naddr);1492 WARN_ON(error);1493 }1494 }1495}1496 1497static int netcp_set_promiscuous(struct netcp_intf *netcp, bool promisc)1498{1499 struct netcp_intf_modpriv *priv;1500 struct netcp_module *module;1501 int error;1502 1503 for_each_module(netcp, priv) {1504 module = priv->netcp_module;1505 if (!module->set_rx_mode)1506 continue;1507 1508 error = module->set_rx_mode(priv->module_priv, promisc);1509 if (error)1510 return error;1511 }1512 return 0;1513}1514 1515static void netcp_set_rx_mode(struct net_device *ndev)1516{1517 struct netcp_intf *netcp = netdev_priv(ndev);1518 struct netdev_hw_addr *ndev_addr;1519 bool promisc;1520 1521 promisc = (ndev->flags & IFF_PROMISC ||1522 ndev->flags & IFF_ALLMULTI ||1523 netdev_mc_count(ndev) > NETCP_MAX_MCAST_ADDR);1524 1525 spin_lock(&netcp->lock);1526 /* first clear all marks */1527 netcp_addr_clear_mark(netcp);1528 1529 /* next add new entries, mark existing ones */1530 netcp_addr_add_mark(netcp, ndev->broadcast, ADDR_BCAST);1531 for_each_dev_addr(ndev, ndev_addr)1532 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_DEV);1533 netdev_for_each_uc_addr(ndev_addr, ndev)1534 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_UCAST);1535 netdev_for_each_mc_addr(ndev_addr, ndev)1536 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_MCAST);1537 1538 if (promisc)1539 netcp_addr_add_mark(netcp, NULL, ADDR_ANY);1540 1541 /* finally sweep and callout into modules */1542 netcp_addr_sweep_del(netcp);1543 netcp_addr_sweep_add(netcp);1544 netcp_set_promiscuous(netcp, promisc);1545 spin_unlock(&netcp->lock);1546}1547 1548static void netcp_free_navigator_resources(struct netcp_intf *netcp)1549{1550 int i;1551 1552 if (netcp->rx_channel) {1553 knav_dma_close_channel(netcp->rx_channel);1554 netcp->rx_channel = NULL;1555 }1556 1557 if (!IS_ERR_OR_NULL(netcp->rx_pool))1558 netcp_rxpool_free(netcp);1559 1560 if (!IS_ERR_OR_NULL(netcp->rx_queue)) {1561 knav_queue_close(netcp->rx_queue);1562 netcp->rx_queue = NULL;1563 }1564 1565 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&1566 !IS_ERR_OR_NULL(netcp->rx_fdq[i]) ; ++i) {1567 knav_queue_close(netcp->rx_fdq[i]);1568 netcp->rx_fdq[i] = NULL;1569 }1570 1571 if (!IS_ERR_OR_NULL(netcp->tx_compl_q)) {1572 knav_queue_close(netcp->tx_compl_q);1573 netcp->tx_compl_q = NULL;1574 }1575 1576 if (!IS_ERR_OR_NULL(netcp->tx_pool)) {1577 knav_pool_destroy(netcp->tx_pool);1578 netcp->tx_pool = NULL;1579 }1580}1581 1582static int netcp_setup_navigator_resources(struct net_device *ndev)1583{1584 struct netcp_intf *netcp = netdev_priv(ndev);1585 struct knav_queue_notify_config notify_cfg;1586 struct knav_dma_cfg config;1587 u32 last_fdq = 0;1588 u8 name[16];1589 int ret;1590 int i;1591 1592 /* Create Rx/Tx descriptor pools */1593 snprintf(name, sizeof(name), "rx-pool-%s", ndev->name);1594 netcp->rx_pool = knav_pool_create(name, netcp->rx_pool_size,1595 netcp->rx_pool_region_id);1596 if (IS_ERR_OR_NULL(netcp->rx_pool)) {1597 dev_err(netcp->ndev_dev, "Couldn't create rx pool\n");1598 ret = PTR_ERR(netcp->rx_pool);1599 goto fail;1600 }1601 1602 snprintf(name, sizeof(name), "tx-pool-%s", ndev->name);1603 netcp->tx_pool = knav_pool_create(name, netcp->tx_pool_size,1604 netcp->tx_pool_region_id);1605 if (IS_ERR_OR_NULL(netcp->tx_pool)) {1606 dev_err(netcp->ndev_dev, "Couldn't create tx pool\n");1607 ret = PTR_ERR(netcp->tx_pool);1608 goto fail;1609 }1610 1611 /* open Tx completion queue */1612 snprintf(name, sizeof(name), "tx-compl-%s", ndev->name);1613 netcp->tx_compl_q = knav_queue_open(name, netcp->tx_compl_qid, 0);1614 if (IS_ERR(netcp->tx_compl_q)) {1615 ret = PTR_ERR(netcp->tx_compl_q);1616 goto fail;1617 }1618 netcp->tx_compl_qid = knav_queue_get_id(netcp->tx_compl_q);1619 1620 /* Set notification for Tx completion */1621 notify_cfg.fn = netcp_tx_notify;1622 notify_cfg.fn_arg = netcp;1623 ret = knav_queue_device_control(netcp->tx_compl_q,1624 KNAV_QUEUE_SET_NOTIFIER,1625 (unsigned long)¬ify_cfg);1626 if (ret)1627 goto fail;1628 1629 knav_queue_disable_notify(netcp->tx_compl_q);1630 1631 /* open Rx completion queue */1632 snprintf(name, sizeof(name), "rx-compl-%s", ndev->name);1633 netcp->rx_queue = knav_queue_open(name, netcp->rx_queue_id, 0);1634 if (IS_ERR(netcp->rx_queue)) {1635 ret = PTR_ERR(netcp->rx_queue);1636 goto fail;1637 }1638 netcp->rx_queue_id = knav_queue_get_id(netcp->rx_queue);1639 1640 /* Set notification for Rx completion */1641 notify_cfg.fn = netcp_rx_notify;1642 notify_cfg.fn_arg = netcp;1643 ret = knav_queue_device_control(netcp->rx_queue,1644 KNAV_QUEUE_SET_NOTIFIER,1645 (unsigned long)¬ify_cfg);1646 if (ret)1647 goto fail;1648 1649 knav_queue_disable_notify(netcp->rx_queue);1650 1651 /* open Rx FDQs */1652 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_queue_depths[i];1653 ++i) {1654 snprintf(name, sizeof(name), "rx-fdq-%s-%d", ndev->name, i);1655 netcp->rx_fdq[i] = knav_queue_open(name, KNAV_QUEUE_GP, 0);1656 if (IS_ERR(netcp->rx_fdq[i])) {1657 ret = PTR_ERR(netcp->rx_fdq[i]);1658 goto fail;1659 }1660 }1661 1662 memset(&config, 0, sizeof(config));1663 config.direction = DMA_DEV_TO_MEM;1664 config.u.rx.einfo_present = true;1665 config.u.rx.psinfo_present = true;1666 config.u.rx.err_mode = DMA_DROP;1667 config.u.rx.desc_type = DMA_DESC_HOST;1668 config.u.rx.psinfo_at_sop = false;1669 config.u.rx.sop_offset = NETCP_SOP_OFFSET;1670 config.u.rx.dst_q = netcp->rx_queue_id;1671 config.u.rx.thresh = DMA_THRESH_NONE;1672 1673 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN; ++i) {1674 if (netcp->rx_fdq[i])1675 last_fdq = knav_queue_get_id(netcp->rx_fdq[i]);1676 config.u.rx.fdq[i] = last_fdq;1677 }1678 1679 netcp->rx_channel = knav_dma_open_channel(netcp->netcp_device->device,1680 netcp->dma_chan_name, &config);1681 if (IS_ERR(netcp->rx_channel)) {1682 dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n",1683 netcp->dma_chan_name);1684 ret = PTR_ERR(netcp->rx_channel);1685 goto fail;1686 }1687 1688 dev_dbg(netcp->ndev_dev, "opened RX channel: %p\n", netcp->rx_channel);1689 return 0;1690 1691fail:1692 netcp_free_navigator_resources(netcp);1693 return ret;1694}1695 1696/* Open the device */1697static int netcp_ndo_open(struct net_device *ndev)1698{1699 struct netcp_intf *netcp = netdev_priv(ndev);1700 struct netcp_intf_modpriv *intf_modpriv;1701 struct netcp_module *module;1702 int ret;1703 1704 netif_carrier_off(ndev);1705 ret = netcp_setup_navigator_resources(ndev);1706 if (ret) {1707 dev_err(netcp->ndev_dev, "Failed to setup navigator resources\n");1708 goto fail;1709 }1710 1711 for_each_module(netcp, intf_modpriv) {1712 module = intf_modpriv->netcp_module;1713 if (module->open) {1714 ret = module->open(intf_modpriv->module_priv, ndev);1715 if (ret != 0) {1716 dev_err(netcp->ndev_dev, "module open failed\n");1717 goto fail_open;1718 }1719 }1720 }1721 1722 napi_enable(&netcp->rx_napi);1723 napi_enable(&netcp->tx_napi);1724 knav_queue_enable_notify(netcp->tx_compl_q);1725 knav_queue_enable_notify(netcp->rx_queue);1726 netcp_rxpool_refill(netcp);1727 netif_tx_wake_all_queues(ndev);1728 dev_dbg(netcp->ndev_dev, "netcp device %s opened\n", ndev->name);1729 return 0;1730 1731fail_open:1732 for_each_module(netcp, intf_modpriv) {1733 module = intf_modpriv->netcp_module;1734 if (module->close)1735 module->close(intf_modpriv->module_priv, ndev);1736 }1737 1738fail:1739 netcp_free_navigator_resources(netcp);1740 return ret;1741}1742 1743/* Close the device */1744static int netcp_ndo_stop(struct net_device *ndev)1745{1746 struct netcp_intf *netcp = netdev_priv(ndev);1747 struct netcp_intf_modpriv *intf_modpriv;1748 struct netcp_module *module;1749 int err = 0;1750 1751 netif_tx_stop_all_queues(ndev);1752 netif_carrier_off(ndev);1753 netcp_addr_clear_mark(netcp);1754 netcp_addr_sweep_del(netcp);1755 knav_queue_disable_notify(netcp->rx_queue);1756 knav_queue_disable_notify(netcp->tx_compl_q);1757 napi_disable(&netcp->rx_napi);1758 napi_disable(&netcp->tx_napi);1759 1760 for_each_module(netcp, intf_modpriv) {1761 module = intf_modpriv->netcp_module;1762 if (module->close) {1763 err = module->close(intf_modpriv->module_priv, ndev);1764 if (err != 0)1765 dev_err(netcp->ndev_dev, "Close failed\n");1766 }1767 }1768 1769 /* Recycle Rx descriptors from completion queue */1770 netcp_empty_rx_queue(netcp);1771 1772 /* Recycle Tx descriptors from completion queue */1773 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);1774 1775 if (knav_pool_count(netcp->tx_pool) != netcp->tx_pool_size)1776 dev_err(netcp->ndev_dev, "Lost (%d) Tx descs\n",1777 netcp->tx_pool_size - knav_pool_count(netcp->tx_pool));1778 1779 netcp_free_navigator_resources(netcp);1780 dev_dbg(netcp->ndev_dev, "netcp device %s stopped\n", ndev->name);1781 return 0;1782}1783 1784static int netcp_ndo_ioctl(struct net_device *ndev,1785 struct ifreq *req, int cmd)1786{1787 struct netcp_intf *netcp = netdev_priv(ndev);1788 struct netcp_intf_modpriv *intf_modpriv;1789 struct netcp_module *module;1790 int ret = -1, err = -EOPNOTSUPP;1791 1792 if (!netif_running(ndev))1793 return -EINVAL;1794 1795 for_each_module(netcp, intf_modpriv) {1796 module = intf_modpriv->netcp_module;1797 if (!module->ioctl)1798 continue;1799 1800 err = module->ioctl(intf_modpriv->module_priv, req, cmd);1801 if ((err < 0) && (err != -EOPNOTSUPP)) {1802 ret = err;1803 goto out;1804 }1805 if (err == 0)1806 ret = err;1807 }1808 1809out:1810 return (ret == 0) ? 0 : err;1811}1812 1813static void netcp_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue)1814{1815 struct netcp_intf *netcp = netdev_priv(ndev);1816 unsigned int descs = knav_pool_count(netcp->tx_pool);1817 1818 dev_err(netcp->ndev_dev, "transmit timed out tx descs(%d)\n", descs);1819 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);1820 netif_trans_update(ndev);1821 netif_tx_wake_all_queues(ndev);1822}1823 1824static int netcp_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid)1825{1826 struct netcp_intf *netcp = netdev_priv(ndev);1827 struct netcp_intf_modpriv *intf_modpriv;1828 struct netcp_module *module;1829 unsigned long flags;1830 int err = 0;1831 1832 dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid);1833 1834 spin_lock_irqsave(&netcp->lock, flags);1835 for_each_module(netcp, intf_modpriv) {1836 module = intf_modpriv->netcp_module;1837 if ((module->add_vid) && (vid != 0)) {1838 err = module->add_vid(intf_modpriv->module_priv, vid);1839 if (err != 0) {1840 dev_err(netcp->ndev_dev, "Could not add vlan id = %d\n",1841 vid);1842 break;1843 }1844 }1845 }1846 spin_unlock_irqrestore(&netcp->lock, flags);1847 1848 return err;1849}1850 1851static int netcp_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid)1852{1853 struct netcp_intf *netcp = netdev_priv(ndev);1854 struct netcp_intf_modpriv *intf_modpriv;1855 struct netcp_module *module;1856 unsigned long flags;1857 int err = 0;1858 1859 dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid);1860 1861 spin_lock_irqsave(&netcp->lock, flags);1862 for_each_module(netcp, intf_modpriv) {1863 module = intf_modpriv->netcp_module;1864 if (module->del_vid) {1865 err = module->del_vid(intf_modpriv->module_priv, vid);1866 if (err != 0) {1867 dev_err(netcp->ndev_dev, "Could not delete vlan id = %d\n",1868 vid);1869 break;1870 }1871 }1872 }1873 spin_unlock_irqrestore(&netcp->lock, flags);1874 return err;1875}1876 1877static int netcp_setup_tc(struct net_device *dev, enum tc_setup_type type,1878 void *type_data)1879{1880 struct tc_mqprio_qopt *mqprio = type_data;1881 u8 num_tc;1882 int i;1883 1884 /* setup tc must be called under rtnl lock */1885 ASSERT_RTNL();1886 1887 if (type != TC_SETUP_QDISC_MQPRIO)1888 return -EOPNOTSUPP;1889 1890 mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;1891 num_tc = mqprio->num_tc;1892 1893 /* Sanity-check the number of traffic classes requested */1894 if ((dev->real_num_tx_queues <= 1) ||1895 (dev->real_num_tx_queues < num_tc))1896 return -EINVAL;1897 1898 /* Configure traffic class to queue mappings */1899 if (num_tc) {1900 netdev_set_num_tc(dev, num_tc);1901 for (i = 0; i < num_tc; i++)1902 netdev_set_tc_queue(dev, i, 1, i);1903 } else {1904 netdev_reset_tc(dev);1905 }1906 1907 return 0;1908}1909 1910static void1911netcp_get_stats(struct net_device *ndev, struct rtnl_link_stats64 *stats)1912{1913 struct netcp_intf *netcp = netdev_priv(ndev);1914 struct netcp_stats *p = &netcp->stats;1915 u64 rxpackets, rxbytes, txpackets, txbytes;1916 unsigned int start;1917 1918 do {1919 start = u64_stats_fetch_begin(&p->syncp_rx);1920 rxpackets = p->rx_packets;1921 rxbytes = p->rx_bytes;1922 } while (u64_stats_fetch_retry(&p->syncp_rx, start));1923 1924 do {1925 start = u64_stats_fetch_begin(&p->syncp_tx);1926 txpackets = p->tx_packets;1927 txbytes = p->tx_bytes;1928 } while (u64_stats_fetch_retry(&p->syncp_tx, start));1929 1930 stats->rx_packets = rxpackets;1931 stats->rx_bytes = rxbytes;1932 stats->tx_packets = txpackets;1933 stats->tx_bytes = txbytes;1934 1935 /* The following are stored as 32 bit */1936 stats->rx_errors = p->rx_errors;1937 stats->rx_dropped = p->rx_dropped;1938 stats->tx_dropped = p->tx_dropped;1939}1940 1941static const struct net_device_ops netcp_netdev_ops = {1942 .ndo_open = netcp_ndo_open,1943 .ndo_stop = netcp_ndo_stop,1944 .ndo_start_xmit = netcp_ndo_start_xmit,1945 .ndo_set_rx_mode = netcp_set_rx_mode,1946 .ndo_eth_ioctl = netcp_ndo_ioctl,1947 .ndo_get_stats64 = netcp_get_stats,1948 .ndo_set_mac_address = eth_mac_addr,1949 .ndo_validate_addr = eth_validate_addr,1950 .ndo_vlan_rx_add_vid = netcp_rx_add_vid,1951 .ndo_vlan_rx_kill_vid = netcp_rx_kill_vid,1952 .ndo_tx_timeout = netcp_ndo_tx_timeout,1953 .ndo_select_queue = dev_pick_tx_zero,1954 .ndo_setup_tc = netcp_setup_tc,1955};1956 1957static int netcp_create_interface(struct netcp_device *netcp_device,1958 struct device_node *node_interface)1959{1960 struct device *dev = netcp_device->device;1961 struct device_node *node = dev->of_node;1962 struct netcp_intf *netcp;1963 struct net_device *ndev;1964 resource_size_t size;1965 struct resource res;1966 void __iomem *efuse = NULL;1967 u32 efuse_mac = 0;1968 u8 efuse_mac_addr[6];1969 u32 temp[2];1970 int ret = 0;1971 1972 ndev = alloc_etherdev_mqs(sizeof(*netcp), 1, 1);1973 if (!ndev) {1974 dev_err(dev, "Error allocating netdev\n");1975 return -ENOMEM;1976 }1977 1978 ndev->features |= NETIF_F_SG;1979 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;1980 ndev->hw_features = ndev->features;1981 ndev->vlan_features |= NETIF_F_SG;1982 1983 /* MTU range: 68 - 9486 */1984 ndev->min_mtu = ETH_MIN_MTU;1985 ndev->max_mtu = NETCP_MAX_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);1986 1987 netcp = netdev_priv(ndev);1988 spin_lock_init(&netcp->lock);1989 INIT_LIST_HEAD(&netcp->module_head);1990 INIT_LIST_HEAD(&netcp->txhook_list_head);1991 INIT_LIST_HEAD(&netcp->rxhook_list_head);1992 INIT_LIST_HEAD(&netcp->addr_list);1993 u64_stats_init(&netcp->stats.syncp_rx);1994 u64_stats_init(&netcp->stats.syncp_tx);1995 netcp->netcp_device = netcp_device;1996 netcp->dev = netcp_device->device;1997 netcp->ndev = ndev;1998 netcp->ndev_dev = &ndev->dev;1999 netcp->msg_enable = netif_msg_init(netcp_debug_level, NETCP_DEBUG);2000 netcp->tx_pause_threshold = MAX_SKB_FRAGS;2001 netcp->tx_resume_threshold = netcp->tx_pause_threshold;2002 netcp->node_interface = node_interface;2003 2004 ret = of_property_read_u32(node_interface, "efuse-mac", &efuse_mac);2005 if (efuse_mac) {2006 if (of_address_to_resource(node, NETCP_EFUSE_REG_INDEX, &res)) {2007 dev_err(dev, "could not find efuse-mac reg resource\n");2008 ret = -ENODEV;2009 goto quit;2010 }2011 size = resource_size(&res);2012 2013 if (!devm_request_mem_region(dev, res.start, size,2014 dev_name(dev))) {2015 dev_err(dev, "could not reserve resource\n");2016 ret = -ENOMEM;2017 goto quit;2018 }2019 2020 efuse = devm_ioremap(dev, res.start, size);2021 if (!efuse) {2022 dev_err(dev, "could not map resource\n");2023 devm_release_mem_region(dev, res.start, size);2024 ret = -ENOMEM;2025 goto quit;2026 }2027 2028 emac_arch_get_mac_addr(efuse_mac_addr, efuse, efuse_mac);2029 if (is_valid_ether_addr(efuse_mac_addr))2030 eth_hw_addr_set(ndev, efuse_mac_addr);2031 else2032 eth_hw_addr_random(ndev);2033 2034 devm_iounmap(dev, efuse);2035 devm_release_mem_region(dev, res.start, size);2036 } else {2037 ret = of_get_ethdev_address(node_interface, ndev);2038 if (ret)2039 eth_hw_addr_random(ndev);2040 }2041 2042 ret = of_property_read_string(node_interface, "rx-channel",2043 &netcp->dma_chan_name);2044 if (ret < 0) {2045 dev_err(dev, "missing \"rx-channel\" parameter\n");2046 ret = -ENODEV;2047 goto quit;2048 }2049 2050 ret = of_property_read_u32(node_interface, "rx-queue",2051 &netcp->rx_queue_id);2052 if (ret < 0) {2053 dev_warn(dev, "missing \"rx-queue\" parameter\n");2054 netcp->rx_queue_id = KNAV_QUEUE_QPEND;2055 }2056 2057 ret = of_property_read_u32_array(node_interface, "rx-queue-depth",2058 netcp->rx_queue_depths,2059 KNAV_DMA_FDQ_PER_CHAN);2060 if (ret < 0) {2061 dev_err(dev, "missing \"rx-queue-depth\" parameter\n");2062 netcp->rx_queue_depths[0] = 128;2063 }2064 2065 ret = of_property_read_u32_array(node_interface, "rx-pool", temp, 2);2066 if (ret < 0) {2067 dev_err(dev, "missing \"rx-pool\" parameter\n");2068 ret = -ENODEV;2069 goto quit;2070 }2071 netcp->rx_pool_size = temp[0];2072 netcp->rx_pool_region_id = temp[1];2073 2074 ret = of_property_read_u32_array(node_interface, "tx-pool", temp, 2);2075 if (ret < 0) {2076 dev_err(dev, "missing \"tx-pool\" parameter\n");2077 ret = -ENODEV;2078 goto quit;2079 }2080 netcp->tx_pool_size = temp[0];2081 netcp->tx_pool_region_id = temp[1];2082 2083 if (netcp->tx_pool_size < MAX_SKB_FRAGS) {2084 dev_err(dev, "tx-pool size too small, must be at least %u\n",2085 (unsigned int)MAX_SKB_FRAGS);2086 ret = -ENODEV;2087 goto quit;2088 }2089 2090 ret = of_property_read_u32(node_interface, "tx-completion-queue",2091 &netcp->tx_compl_qid);2092 if (ret < 0) {2093 dev_warn(dev, "missing \"tx-completion-queue\" parameter\n");2094 netcp->tx_compl_qid = KNAV_QUEUE_QPEND;2095 }2096 2097 /* NAPI register */2098 netif_napi_add(ndev, &netcp->rx_napi, netcp_rx_poll);2099 netif_napi_add_tx(ndev, &netcp->tx_napi, netcp_tx_poll);2100 2101 /* Register the network device */2102 ndev->dev_id = 0;2103 ndev->watchdog_timeo = NETCP_TX_TIMEOUT;2104 ndev->netdev_ops = &netcp_netdev_ops;2105 SET_NETDEV_DEV(ndev, dev);2106 2107 list_add_tail(&netcp->interface_list, &netcp_device->interface_head);2108 return 0;2109 2110quit:2111 free_netdev(ndev);2112 return ret;2113}2114 2115static void netcp_delete_interface(struct netcp_device *netcp_device,2116 struct net_device *ndev)2117{2118 struct netcp_intf_modpriv *intf_modpriv, *tmp;2119 struct netcp_intf *netcp = netdev_priv(ndev);2120 struct netcp_module *module;2121 2122 dev_dbg(netcp_device->device, "Removing interface \"%s\"\n",2123 ndev->name);2124 2125 /* Notify each of the modules that the interface is going away */2126 list_for_each_entry_safe(intf_modpriv, tmp, &netcp->module_head,2127 intf_list) {2128 module = intf_modpriv->netcp_module;2129 dev_dbg(netcp_device->device, "Releasing module \"%s\"\n",2130 module->name);2131 if (module->release)2132 module->release(intf_modpriv->module_priv);2133 list_del(&intf_modpriv->intf_list);2134 }2135 WARN(!list_empty(&netcp->module_head), "%s interface module list is not empty!\n",2136 ndev->name);2137 2138 list_del(&netcp->interface_list);2139 2140 of_node_put(netcp->node_interface);2141 unregister_netdev(ndev);2142 free_netdev(ndev);2143}2144 2145static int netcp_probe(struct platform_device *pdev)2146{2147 struct device_node *node = pdev->dev.of_node;2148 struct netcp_intf *netcp_intf, *netcp_tmp;2149 struct device_node *child, *interfaces;2150 struct netcp_device *netcp_device;2151 struct device *dev = &pdev->dev;2152 struct netcp_module *module;2153 int ret;2154 2155 if (!knav_dma_device_ready() ||2156 !knav_qmss_device_ready())2157 return -EPROBE_DEFER;2158 2159 if (!node) {2160 dev_err(dev, "could not find device info\n");2161 return -ENODEV;2162 }2163 2164 /* Allocate a new NETCP device instance */2165 netcp_device = devm_kzalloc(dev, sizeof(*netcp_device), GFP_KERNEL);2166 if (!netcp_device)2167 return -ENOMEM;2168 2169 pm_runtime_enable(&pdev->dev);2170 ret = pm_runtime_get_sync(&pdev->dev);2171 if (ret < 0) {2172 dev_err(dev, "Failed to enable NETCP power-domain\n");2173 pm_runtime_disable(&pdev->dev);2174 return ret;2175 }2176 2177 /* Initialize the NETCP device instance */2178 INIT_LIST_HEAD(&netcp_device->interface_head);2179 INIT_LIST_HEAD(&netcp_device->modpriv_head);2180 netcp_device->device = dev;2181 platform_set_drvdata(pdev, netcp_device);2182 2183 /* create interfaces */2184 interfaces = of_get_child_by_name(node, "netcp-interfaces");2185 if (!interfaces) {2186 dev_err(dev, "could not find netcp-interfaces node\n");2187 ret = -ENODEV;2188 goto probe_quit;2189 }2190 2191 for_each_available_child_of_node(interfaces, child) {2192 ret = netcp_create_interface(netcp_device, child);2193 if (ret) {2194 dev_err(dev, "could not create interface(%pOFn)\n",2195 child);2196 goto probe_quit_interface;2197 }2198 }2199 2200 of_node_put(interfaces);2201 2202 /* Add the device instance to the list */2203 list_add_tail(&netcp_device->device_list, &netcp_devices);2204 2205 /* Probe & attach any modules already registered */2206 mutex_lock(&netcp_modules_lock);2207 for_each_netcp_module(module) {2208 ret = netcp_module_probe(netcp_device, module);2209 if (ret < 0)2210 dev_err(dev, "module(%s) probe failed\n", module->name);2211 }2212 mutex_unlock(&netcp_modules_lock);2213 return 0;2214 2215probe_quit_interface:2216 list_for_each_entry_safe(netcp_intf, netcp_tmp,2217 &netcp_device->interface_head,2218 interface_list) {2219 netcp_delete_interface(netcp_device, netcp_intf->ndev);2220 }2221 2222 of_node_put(interfaces);2223 2224probe_quit:2225 pm_runtime_put_sync(&pdev->dev);2226 pm_runtime_disable(&pdev->dev);2227 platform_set_drvdata(pdev, NULL);2228 return ret;2229}2230 2231static void netcp_remove(struct platform_device *pdev)2232{2233 struct netcp_device *netcp_device = platform_get_drvdata(pdev);2234 struct netcp_intf *netcp_intf, *netcp_tmp;2235 struct netcp_inst_modpriv *inst_modpriv, *tmp;2236 struct netcp_module *module;2237 2238 list_for_each_entry_safe(inst_modpriv, tmp, &netcp_device->modpriv_head,2239 inst_list) {2240 module = inst_modpriv->netcp_module;2241 dev_dbg(&pdev->dev, "Removing module \"%s\"\n", module->name);2242 module->remove(netcp_device, inst_modpriv->module_priv);2243 list_del(&inst_modpriv->inst_list);2244 }2245 2246 /* now that all modules are removed, clean up the interfaces */2247 list_for_each_entry_safe(netcp_intf, netcp_tmp,2248 &netcp_device->interface_head,2249 interface_list) {2250 netcp_delete_interface(netcp_device, netcp_intf->ndev);2251 }2252 2253 WARN(!list_empty(&netcp_device->interface_head),2254 "%s interface list not empty!\n", pdev->name);2255 2256 pm_runtime_put_sync(&pdev->dev);2257 pm_runtime_disable(&pdev->dev);2258 platform_set_drvdata(pdev, NULL);2259}2260 2261static const struct of_device_id of_match[] = {2262 { .compatible = "ti,netcp-1.0", },2263 {},2264};2265MODULE_DEVICE_TABLE(of, of_match);2266 2267static struct platform_driver netcp_driver = {2268 .driver = {2269 .name = "netcp-1.0",2270 .of_match_table = of_match,2271 },2272 .probe = netcp_probe,2273 .remove_new = netcp_remove,2274};2275module_platform_driver(netcp_driver);2276 2277MODULE_LICENSE("GPL v2");2278MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs");2279MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com");2280