2 * Keystone NetCP Core driver
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>
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.
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.
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>
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_MIN_PACKET_SIZE ETH_ZLEN
38 #define NETCP_MAX_MCAST_ADDR 16
40 #define NETCP_EFUSE_REG_INDEX 0
42 #define NETCP_MOD_PROBE_SKIPPED 1
43 #define NETCP_MOD_PROBE_FAILED 2
45 #define NETCP_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \
46 NETIF_MSG_DRV | NETIF_MSG_LINK | \
47 NETIF_MSG_IFUP | NETIF_MSG_INTR | \
48 NETIF_MSG_PROBE | NETIF_MSG_TIMER | \
49 NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \
50 NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \
51 NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \
54 #define knav_queue_get_id(q) knav_queue_device_control(q, \
55 KNAV_QUEUE_GET_ID, (unsigned long)NULL)
57 #define knav_queue_enable_notify(q) knav_queue_device_control(q, \
58 KNAV_QUEUE_ENABLE_NOTIFY, \
61 #define knav_queue_disable_notify(q) knav_queue_device_control(q, \
62 KNAV_QUEUE_DISABLE_NOTIFY, \
65 #define knav_queue_get_count(q) knav_queue_device_control(q, \
66 KNAV_QUEUE_GET_COUNT, (unsigned long)NULL)
68 #define for_each_netcp_module(module) \
69 list_for_each_entry(module, &netcp_modules, module_list)
71 #define for_each_netcp_device_module(netcp_device, inst_modpriv) \
72 list_for_each_entry(inst_modpriv, \
73 &((netcp_device)->modpriv_head), inst_list)
75 #define for_each_module(netcp, intf_modpriv) \
76 list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list)
78 /* Module management structures */
80 struct list_head device_list;
81 struct list_head interface_head;
82 struct list_head modpriv_head;
83 struct device *device;
86 struct netcp_inst_modpriv {
87 struct netcp_device *netcp_device;
88 struct netcp_module *netcp_module;
89 struct list_head inst_list;
93 struct netcp_intf_modpriv {
94 struct netcp_intf *netcp_priv;
95 struct netcp_module *netcp_module;
96 struct list_head intf_list;
100 static LIST_HEAD(netcp_devices);
101 static LIST_HEAD(netcp_modules);
102 static DEFINE_MUTEX(netcp_modules_lock);
104 static int netcp_debug_level = -1;
105 module_param(netcp_debug_level, int, 0);
106 MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");
108 /* Helper functions - Get/Set */
109 static void get_pkt_info(u32 *buff, u32 *buff_len, u32 *ndesc,
110 struct knav_dma_desc *desc)
112 *buff_len = desc->buff_len;
114 *ndesc = desc->next_desc;
117 static void get_pad_info(u32 *pad0, u32 *pad1, struct knav_dma_desc *desc)
119 *pad0 = desc->pad[0];
120 *pad1 = desc->pad[1];
123 static void get_org_pkt_info(u32 *buff, u32 *buff_len,
124 struct knav_dma_desc *desc)
126 *buff = desc->orig_buff;
127 *buff_len = desc->orig_len;
130 static void get_words(u32 *words, int num_words, u32 *desc)
134 for (i = 0; i < num_words; i++)
138 static void set_pkt_info(u32 buff, u32 buff_len, u32 ndesc,
139 struct knav_dma_desc *desc)
141 desc->buff_len = buff_len;
143 desc->next_desc = ndesc;
146 static void set_desc_info(u32 desc_info, u32 pkt_info,
147 struct knav_dma_desc *desc)
149 desc->desc_info = desc_info;
150 desc->packet_info = pkt_info;
153 static void set_pad_info(u32 pad0, u32 pad1, struct knav_dma_desc *desc)
159 static void set_org_pkt_info(u32 buff, u32 buff_len,
160 struct knav_dma_desc *desc)
162 desc->orig_buff = buff;
163 desc->orig_len = buff_len;
166 static void set_words(u32 *words, int num_words, u32 *desc)
170 for (i = 0; i < num_words; i++)
174 /* Read the e-fuse value as 32 bit values to be endian independent */
175 static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac)
177 unsigned int addr0, addr1;
179 addr1 = readl(efuse_mac + 4);
180 addr0 = readl(efuse_mac);
182 x[0] = (addr1 & 0x0000ff00) >> 8;
183 x[1] = addr1 & 0x000000ff;
184 x[2] = (addr0 & 0xff000000) >> 24;
185 x[3] = (addr0 & 0x00ff0000) >> 16;
186 x[4] = (addr0 & 0x0000ff00) >> 8;
187 x[5] = addr0 & 0x000000ff;
192 static const char *netcp_node_name(struct device_node *node)
196 if (of_property_read_string(node, "label", &name) < 0)
203 /* Module management routines */
204 static int netcp_register_interface(struct netcp_intf *netcp)
208 ret = register_netdev(netcp->ndev);
210 netcp->netdev_registered = true;
214 static int netcp_module_probe(struct netcp_device *netcp_device,
215 struct netcp_module *module)
217 struct device *dev = netcp_device->device;
218 struct device_node *devices, *interface, *node = dev->of_node;
219 struct device_node *child;
220 struct netcp_inst_modpriv *inst_modpriv;
221 struct netcp_intf *netcp_intf;
222 struct netcp_module *tmp;
223 bool primary_module_registered = false;
226 /* Find this module in the sub-tree for this device */
227 devices = of_get_child_by_name(node, "netcp-devices");
229 dev_err(dev, "could not find netcp-devices node\n");
230 return NETCP_MOD_PROBE_SKIPPED;
233 for_each_available_child_of_node(devices, child) {
234 const char *name = netcp_node_name(child);
236 if (!strcasecmp(module->name, name))
240 of_node_put(devices);
241 /* If module not used for this device, skip it */
243 dev_warn(dev, "module(%s) not used for device\n", module->name);
244 return NETCP_MOD_PROBE_SKIPPED;
247 inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL);
253 inst_modpriv->netcp_device = netcp_device;
254 inst_modpriv->netcp_module = module;
255 list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head);
257 ret = module->probe(netcp_device, dev, child,
258 &inst_modpriv->module_priv);
261 dev_err(dev, "Probe of module(%s) failed with %d\n",
263 list_del(&inst_modpriv->inst_list);
264 devm_kfree(dev, inst_modpriv);
265 return NETCP_MOD_PROBE_FAILED;
268 /* Attach modules only if the primary module is probed */
269 for_each_netcp_module(tmp) {
271 primary_module_registered = true;
274 if (!primary_module_registered)
277 /* Attach module to interfaces */
278 list_for_each_entry(netcp_intf, &netcp_device->interface_head,
280 struct netcp_intf_modpriv *intf_modpriv;
282 /* If interface not registered then register now */
283 if (!netcp_intf->netdev_registered)
284 ret = netcp_register_interface(netcp_intf);
289 intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv),
294 interface = of_parse_phandle(netcp_intf->node_interface,
297 intf_modpriv->netcp_priv = netcp_intf;
298 intf_modpriv->netcp_module = module;
299 list_add_tail(&intf_modpriv->intf_list,
300 &netcp_intf->module_head);
302 ret = module->attach(inst_modpriv->module_priv,
303 netcp_intf->ndev, interface,
304 &intf_modpriv->module_priv);
305 of_node_put(interface);
307 dev_dbg(dev, "Attach of module %s declined with %d\n",
309 list_del(&intf_modpriv->intf_list);
310 devm_kfree(dev, intf_modpriv);
317 int netcp_register_module(struct netcp_module *module)
319 struct netcp_device *netcp_device;
320 struct netcp_module *tmp;
324 WARN(1, "error registering netcp module: no name\n");
328 if (!module->probe) {
329 WARN(1, "error registering netcp module: no probe\n");
333 mutex_lock(&netcp_modules_lock);
335 for_each_netcp_module(tmp) {
336 if (!strcasecmp(tmp->name, module->name)) {
337 mutex_unlock(&netcp_modules_lock);
341 list_add_tail(&module->module_list, &netcp_modules);
343 list_for_each_entry(netcp_device, &netcp_devices, device_list) {
344 ret = netcp_module_probe(netcp_device, module);
349 mutex_unlock(&netcp_modules_lock);
353 mutex_unlock(&netcp_modules_lock);
354 netcp_unregister_module(module);
357 EXPORT_SYMBOL_GPL(netcp_register_module);
359 static void netcp_release_module(struct netcp_device *netcp_device,
360 struct netcp_module *module)
362 struct netcp_inst_modpriv *inst_modpriv, *inst_tmp;
363 struct netcp_intf *netcp_intf, *netcp_tmp;
364 struct device *dev = netcp_device->device;
366 /* Release the module from each interface */
367 list_for_each_entry_safe(netcp_intf, netcp_tmp,
368 &netcp_device->interface_head,
370 struct netcp_intf_modpriv *intf_modpriv, *intf_tmp;
372 list_for_each_entry_safe(intf_modpriv, intf_tmp,
373 &netcp_intf->module_head,
375 if (intf_modpriv->netcp_module == module) {
376 module->release(intf_modpriv->module_priv);
377 list_del(&intf_modpriv->intf_list);
378 devm_kfree(dev, intf_modpriv);
384 /* Remove the module from each instance */
385 list_for_each_entry_safe(inst_modpriv, inst_tmp,
386 &netcp_device->modpriv_head, inst_list) {
387 if (inst_modpriv->netcp_module == module) {
388 module->remove(netcp_device,
389 inst_modpriv->module_priv);
390 list_del(&inst_modpriv->inst_list);
391 devm_kfree(dev, inst_modpriv);
397 void netcp_unregister_module(struct netcp_module *module)
399 struct netcp_device *netcp_device;
400 struct netcp_module *module_tmp;
402 mutex_lock(&netcp_modules_lock);
404 list_for_each_entry(netcp_device, &netcp_devices, device_list) {
405 netcp_release_module(netcp_device, module);
408 /* Remove the module from the module list */
409 for_each_netcp_module(module_tmp) {
410 if (module == module_tmp) {
411 list_del(&module->module_list);
416 mutex_unlock(&netcp_modules_lock);
418 EXPORT_SYMBOL_GPL(netcp_unregister_module);
420 void *netcp_module_get_intf_data(struct netcp_module *module,
421 struct netcp_intf *intf)
423 struct netcp_intf_modpriv *intf_modpriv;
425 list_for_each_entry(intf_modpriv, &intf->module_head, intf_list)
426 if (intf_modpriv->netcp_module == module)
427 return intf_modpriv->module_priv;
430 EXPORT_SYMBOL_GPL(netcp_module_get_intf_data);
432 /* Module TX and RX Hook management */
433 struct netcp_hook_list {
434 struct list_head list;
435 netcp_hook_rtn *hook_rtn;
440 int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
441 netcp_hook_rtn *hook_rtn, void *hook_data)
443 struct netcp_hook_list *entry;
444 struct netcp_hook_list *next;
447 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
451 entry->hook_rtn = hook_rtn;
452 entry->hook_data = hook_data;
453 entry->order = order;
455 spin_lock_irqsave(&netcp_priv->lock, flags);
456 list_for_each_entry(next, &netcp_priv->txhook_list_head, list) {
457 if (next->order > order)
460 __list_add(&entry->list, next->list.prev, &next->list);
461 spin_unlock_irqrestore(&netcp_priv->lock, flags);
465 EXPORT_SYMBOL_GPL(netcp_register_txhook);
467 int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,
468 netcp_hook_rtn *hook_rtn, void *hook_data)
470 struct netcp_hook_list *next, *n;
473 spin_lock_irqsave(&netcp_priv->lock, flags);
474 list_for_each_entry_safe(next, n, &netcp_priv->txhook_list_head, list) {
475 if ((next->order == order) &&
476 (next->hook_rtn == hook_rtn) &&
477 (next->hook_data == hook_data)) {
478 list_del(&next->list);
479 spin_unlock_irqrestore(&netcp_priv->lock, flags);
480 devm_kfree(netcp_priv->dev, next);
484 spin_unlock_irqrestore(&netcp_priv->lock, flags);
487 EXPORT_SYMBOL_GPL(netcp_unregister_txhook);
489 int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,
490 netcp_hook_rtn *hook_rtn, void *hook_data)
492 struct netcp_hook_list *entry;
493 struct netcp_hook_list *next;
496 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
500 entry->hook_rtn = hook_rtn;
501 entry->hook_data = hook_data;
502 entry->order = order;
504 spin_lock_irqsave(&netcp_priv->lock, flags);
505 list_for_each_entry(next, &netcp_priv->rxhook_list_head, list) {
506 if (next->order > order)
509 __list_add(&entry->list, next->list.prev, &next->list);
510 spin_unlock_irqrestore(&netcp_priv->lock, flags);
515 int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,
516 netcp_hook_rtn *hook_rtn, void *hook_data)
518 struct netcp_hook_list *next, *n;
521 spin_lock_irqsave(&netcp_priv->lock, flags);
522 list_for_each_entry_safe(next, n, &netcp_priv->rxhook_list_head, list) {
523 if ((next->order == order) &&
524 (next->hook_rtn == hook_rtn) &&
525 (next->hook_data == hook_data)) {
526 list_del(&next->list);
527 spin_unlock_irqrestore(&netcp_priv->lock, flags);
528 devm_kfree(netcp_priv->dev, next);
532 spin_unlock_irqrestore(&netcp_priv->lock, flags);
537 static void netcp_frag_free(bool is_frag, void *ptr)
540 put_page(virt_to_head_page(ptr));
545 static void netcp_free_rx_desc_chain(struct netcp_intf *netcp,
546 struct knav_dma_desc *desc)
548 struct knav_dma_desc *ndesc;
549 dma_addr_t dma_desc, dma_buf;
550 unsigned int buf_len, dma_sz = sizeof(*ndesc);
554 get_words(&dma_desc, 1, &desc->next_desc);
557 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
558 if (unlikely(!ndesc)) {
559 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
562 get_pkt_info(&dma_buf, &tmp, &dma_desc, ndesc);
563 get_pad_info((u32 *)&buf_ptr, &tmp, ndesc);
564 dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE);
565 __free_page(buf_ptr);
566 knav_pool_desc_put(netcp->rx_pool, desc);
569 get_pad_info((u32 *)&buf_ptr, &buf_len, desc);
571 netcp_frag_free(buf_len <= PAGE_SIZE, buf_ptr);
572 knav_pool_desc_put(netcp->rx_pool, desc);
575 static void netcp_empty_rx_queue(struct netcp_intf *netcp)
577 struct knav_dma_desc *desc;
582 dma = knav_queue_pop(netcp->rx_queue, &dma_sz);
586 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
587 if (unlikely(!desc)) {
588 dev_err(netcp->ndev_dev, "%s: failed to unmap Rx desc\n",
590 netcp->ndev->stats.rx_errors++;
593 netcp_free_rx_desc_chain(netcp, desc);
594 netcp->ndev->stats.rx_dropped++;
598 static int netcp_process_one_rx_packet(struct netcp_intf *netcp)
600 unsigned int dma_sz, buf_len, org_buf_len;
601 struct knav_dma_desc *desc, *ndesc;
602 unsigned int pkt_sz = 0, accum_sz;
603 struct netcp_hook_list *rx_hook;
604 dma_addr_t dma_desc, dma_buff;
605 struct netcp_packet p_info;
610 dma_desc = knav_queue_pop(netcp->rx_queue, &dma_sz);
614 desc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
615 if (unlikely(!desc)) {
616 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
620 get_pkt_info(&dma_buff, &buf_len, &dma_desc, desc);
621 get_pad_info((u32 *)&org_buf_ptr, &org_buf_len, desc);
623 if (unlikely(!org_buf_ptr)) {
624 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
628 pkt_sz &= KNAV_DMA_DESC_PKT_LEN_MASK;
630 dma_unmap_single(netcp->dev, dma_buff, buf_len, DMA_FROM_DEVICE);
632 /* Build a new sk_buff for the primary buffer */
633 skb = build_skb(org_buf_ptr, org_buf_len);
634 if (unlikely(!skb)) {
635 dev_err(netcp->ndev_dev, "build_skb() failed\n");
639 /* update data, tail and len */
640 skb_reserve(skb, NETCP_SOP_OFFSET);
641 __skb_put(skb, buf_len);
643 /* Fill in the page fragment list */
647 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
648 if (unlikely(!ndesc)) {
649 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
653 get_pkt_info(&dma_buff, &buf_len, &dma_desc, ndesc);
654 get_pad_info((u32 *)&page, &tmp, ndesc);
656 if (likely(dma_buff && buf_len && page)) {
657 dma_unmap_page(netcp->dev, dma_buff, PAGE_SIZE,
660 dev_err(netcp->ndev_dev, "Bad Rx desc dma_buff(%p), len(%d), page(%p)\n",
661 (void *)dma_buff, buf_len, page);
665 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
666 offset_in_page(dma_buff), buf_len, PAGE_SIZE);
669 /* Free the descriptor */
670 knav_pool_desc_put(netcp->rx_pool, ndesc);
673 /* Free the primary descriptor */
674 knav_pool_desc_put(netcp->rx_pool, desc);
676 /* check for packet len and warn */
677 if (unlikely(pkt_sz != accum_sz))
678 dev_dbg(netcp->ndev_dev, "mismatch in packet size(%d) & sum of fragments(%d)\n",
681 /* Remove ethernet FCS from the packet */
682 __pskb_trim(skb, skb->len - ETH_FCS_LEN);
684 /* Call each of the RX hooks */
686 p_info.rxtstamp_complete = false;
687 list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) {
690 ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data,
693 dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n",
694 rx_hook->order, ret);
695 netcp->ndev->stats.rx_errors++;
701 netcp->ndev->last_rx = jiffies;
702 netcp->ndev->stats.rx_packets++;
703 netcp->ndev->stats.rx_bytes += skb->len;
705 /* push skb up the stack */
706 skb->protocol = eth_type_trans(skb, netcp->ndev);
707 netif_receive_skb(skb);
711 netcp_free_rx_desc_chain(netcp, desc);
712 netcp->ndev->stats.rx_errors++;
716 static int netcp_process_rx_packets(struct netcp_intf *netcp,
721 for (i = 0; (i < budget) && !netcp_process_one_rx_packet(netcp); i++)
726 /* Release descriptors and attached buffers from Rx FDQ */
727 static void netcp_free_rx_buf(struct netcp_intf *netcp, int fdq)
729 struct knav_dma_desc *desc;
730 unsigned int buf_len, dma_sz;
735 /* Allocate descriptor */
736 while ((dma = knav_queue_pop(netcp->rx_fdq[fdq], &dma_sz))) {
737 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
738 if (unlikely(!desc)) {
739 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
743 get_org_pkt_info(&dma, &buf_len, desc);
744 get_pad_info((u32 *)&buf_ptr, &tmp, desc);
746 if (unlikely(!dma)) {
747 dev_err(netcp->ndev_dev, "NULL orig_buff in desc\n");
748 knav_pool_desc_put(netcp->rx_pool, desc);
752 if (unlikely(!buf_ptr)) {
753 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
754 knav_pool_desc_put(netcp->rx_pool, desc);
759 dma_unmap_single(netcp->dev, dma, buf_len,
761 netcp_frag_free((buf_len <= PAGE_SIZE), buf_ptr);
763 dma_unmap_page(netcp->dev, dma, buf_len,
765 __free_page(buf_ptr);
768 knav_pool_desc_put(netcp->rx_pool, desc);
772 static void netcp_rxpool_free(struct netcp_intf *netcp)
776 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
777 !IS_ERR_OR_NULL(netcp->rx_fdq[i]); i++)
778 netcp_free_rx_buf(netcp, i);
780 if (knav_pool_count(netcp->rx_pool) != netcp->rx_pool_size)
781 dev_err(netcp->ndev_dev, "Lost Rx (%d) descriptors\n",
782 netcp->rx_pool_size - knav_pool_count(netcp->rx_pool));
784 knav_pool_destroy(netcp->rx_pool);
785 netcp->rx_pool = NULL;
788 static void netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq)
790 struct knav_dma_desc *hwdesc;
791 unsigned int buf_len, dma_sz;
792 u32 desc_info, pkt_info;
798 /* Allocate descriptor */
799 hwdesc = knav_pool_desc_get(netcp->rx_pool);
800 if (IS_ERR_OR_NULL(hwdesc)) {
801 dev_dbg(netcp->ndev_dev, "out of rx pool desc\n");
805 if (likely(fdq == 0)) {
806 unsigned int primary_buf_len;
807 /* Allocate a primary receive queue entry */
808 buf_len = netcp->rx_buffer_sizes[0] + NETCP_SOP_OFFSET;
809 primary_buf_len = SKB_DATA_ALIGN(buf_len) +
810 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
812 if (primary_buf_len <= PAGE_SIZE) {
813 bufptr = netdev_alloc_frag(primary_buf_len);
814 pad[1] = primary_buf_len;
816 bufptr = kmalloc(primary_buf_len, GFP_ATOMIC |
817 GFP_DMA32 | __GFP_COLD);
821 if (unlikely(!bufptr)) {
822 dev_warn_ratelimited(netcp->ndev_dev, "Primary RX buffer alloc failed\n");
825 dma = dma_map_single(netcp->dev, bufptr, buf_len,
827 pad[0] = (u32)bufptr;
830 /* Allocate a secondary receive queue entry */
831 page = alloc_page(GFP_ATOMIC | GFP_DMA32 | __GFP_COLD);
832 if (unlikely(!page)) {
833 dev_warn_ratelimited(netcp->ndev_dev, "Secondary page alloc failed\n");
837 dma = dma_map_page(netcp->dev, page, 0, buf_len, DMA_TO_DEVICE);
842 desc_info = KNAV_DMA_DESC_PS_INFO_IN_DESC;
843 desc_info |= buf_len & KNAV_DMA_DESC_PKT_LEN_MASK;
844 pkt_info = KNAV_DMA_DESC_HAS_EPIB;
845 pkt_info |= KNAV_DMA_NUM_PS_WORDS << KNAV_DMA_DESC_PSLEN_SHIFT;
846 pkt_info |= (netcp->rx_queue_id & KNAV_DMA_DESC_RETQ_MASK) <<
847 KNAV_DMA_DESC_RETQ_SHIFT;
848 set_org_pkt_info(dma, buf_len, hwdesc);
849 set_pad_info(pad[0], pad[1], hwdesc);
850 set_desc_info(desc_info, pkt_info, hwdesc);
853 knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma,
855 knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0);
859 knav_pool_desc_put(netcp->rx_pool, hwdesc);
862 /* Refill Rx FDQ with descriptors & attached buffers */
863 static void netcp_rxpool_refill(struct netcp_intf *netcp)
865 u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0};
868 /* Calculate the FDQ deficit and refill */
869 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) {
870 fdq_deficit[i] = netcp->rx_queue_depths[i] -
871 knav_queue_get_count(netcp->rx_fdq[i]);
873 while (fdq_deficit[i]--)
874 netcp_allocate_rx_buf(netcp, i);
879 static int netcp_rx_poll(struct napi_struct *napi, int budget)
881 struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
883 unsigned int packets;
885 packets = netcp_process_rx_packets(netcp, budget);
887 if (packets < budget) {
888 napi_complete(&netcp->rx_napi);
889 knav_queue_enable_notify(netcp->rx_queue);
892 netcp_rxpool_refill(netcp);
896 static void netcp_rx_notify(void *arg)
898 struct netcp_intf *netcp = arg;
900 knav_queue_disable_notify(netcp->rx_queue);
901 napi_schedule(&netcp->rx_napi);
904 static void netcp_free_tx_desc_chain(struct netcp_intf *netcp,
905 struct knav_dma_desc *desc,
906 unsigned int desc_sz)
908 struct knav_dma_desc *ndesc = desc;
909 dma_addr_t dma_desc, dma_buf;
910 unsigned int buf_len;
913 get_pkt_info(&dma_buf, &buf_len, &dma_desc, ndesc);
915 if (dma_buf && buf_len)
916 dma_unmap_single(netcp->dev, dma_buf, buf_len,
919 dev_warn(netcp->ndev_dev, "bad Tx desc buf(%p), len(%d)\n",
920 (void *)dma_buf, buf_len);
922 knav_pool_desc_put(netcp->tx_pool, ndesc);
925 ndesc = knav_pool_desc_unmap(netcp->tx_pool, dma_desc,
928 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
933 static int netcp_process_tx_compl_packets(struct netcp_intf *netcp,
936 struct knav_dma_desc *desc;
944 dma = knav_queue_pop(netcp->tx_compl_q, &dma_sz);
947 desc = knav_pool_desc_unmap(netcp->tx_pool, dma, dma_sz);
948 if (unlikely(!desc)) {
949 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
950 netcp->ndev->stats.tx_errors++;
954 get_pad_info((u32 *)&skb, &tmp, desc);
955 netcp_free_tx_desc_chain(netcp, desc, dma_sz);
957 dev_err(netcp->ndev_dev, "No skb in Tx desc\n");
958 netcp->ndev->stats.tx_errors++;
962 if (netif_subqueue_stopped(netcp->ndev, skb) &&
963 netif_running(netcp->ndev) &&
964 (knav_pool_count(netcp->tx_pool) >
965 netcp->tx_resume_threshold)) {
966 u16 subqueue = skb_get_queue_mapping(skb);
968 netif_wake_subqueue(netcp->ndev, subqueue);
971 netcp->ndev->stats.tx_packets++;
972 netcp->ndev->stats.tx_bytes += skb->len;
979 static int netcp_tx_poll(struct napi_struct *napi, int budget)
982 struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
985 packets = netcp_process_tx_compl_packets(netcp, budget);
986 if (packets < budget) {
987 napi_complete(&netcp->tx_napi);
988 knav_queue_enable_notify(netcp->tx_compl_q);
994 static void netcp_tx_notify(void *arg)
996 struct netcp_intf *netcp = arg;
998 knav_queue_disable_notify(netcp->tx_compl_q);
999 napi_schedule(&netcp->tx_napi);
1002 static struct knav_dma_desc*
1003 netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp)
1005 struct knav_dma_desc *desc, *ndesc, *pdesc;
1006 unsigned int pkt_len = skb_headlen(skb);
1007 struct device *dev = netcp->dev;
1008 dma_addr_t dma_addr;
1009 unsigned int dma_sz;
1012 /* Map the linear buffer */
1013 dma_addr = dma_map_single(dev, skb->data, pkt_len, DMA_TO_DEVICE);
1014 if (unlikely(!dma_addr)) {
1015 dev_err(netcp->ndev_dev, "Failed to map skb buffer\n");
1019 desc = knav_pool_desc_get(netcp->tx_pool);
1020 if (unlikely(IS_ERR_OR_NULL(desc))) {
1021 dev_err(netcp->ndev_dev, "out of TX desc\n");
1022 dma_unmap_single(dev, dma_addr, pkt_len, DMA_TO_DEVICE);
1026 set_pkt_info(dma_addr, pkt_len, 0, desc);
1027 if (skb_is_nonlinear(skb)) {
1028 prefetchw(skb_shinfo(skb));
1030 desc->next_desc = 0;
1036 /* Handle the case where skb is fragmented in pages */
1037 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1038 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1039 struct page *page = skb_frag_page(frag);
1040 u32 page_offset = frag->page_offset;
1041 u32 buf_len = skb_frag_size(frag);
1042 dma_addr_t desc_dma;
1045 dma_addr = dma_map_page(dev, page, page_offset, buf_len,
1047 if (unlikely(!dma_addr)) {
1048 dev_err(netcp->ndev_dev, "Failed to map skb page\n");
1052 ndesc = knav_pool_desc_get(netcp->tx_pool);
1053 if (unlikely(IS_ERR_OR_NULL(ndesc))) {
1054 dev_err(netcp->ndev_dev, "out of TX desc for frags\n");
1055 dma_unmap_page(dev, dma_addr, buf_len, DMA_TO_DEVICE);
1059 desc_dma = knav_pool_desc_virt_to_dma(netcp->tx_pool,
1062 (netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<
1063 KNAV_DMA_DESC_RETQ_SHIFT;
1064 set_pkt_info(dma_addr, buf_len, 0, ndesc);
1065 set_words(&desc_dma, 1, &pdesc->next_desc);
1068 knav_pool_desc_map(netcp->tx_pool, pdesc,
1069 sizeof(*pdesc), &desc_dma, &dma_sz);
1073 knav_pool_desc_map(netcp->tx_pool, pdesc, sizeof(*pdesc),
1074 &dma_addr, &dma_sz);
1076 /* frag list based linkage is not supported for now. */
1077 if (skb_shinfo(skb)->frag_list) {
1078 dev_err_ratelimited(netcp->ndev_dev, "NETIF_F_FRAGLIST not supported\n");
1083 WARN_ON(pkt_len != skb->len);
1085 pkt_len &= KNAV_DMA_DESC_PKT_LEN_MASK;
1086 set_words(&pkt_len, 1, &desc->desc_info);
1090 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
1094 static int netcp_tx_submit_skb(struct netcp_intf *netcp,
1095 struct sk_buff *skb,
1096 struct knav_dma_desc *desc)
1098 struct netcp_tx_pipe *tx_pipe = NULL;
1099 struct netcp_hook_list *tx_hook;
1100 struct netcp_packet p_info;
1101 unsigned int dma_sz;
1106 p_info.netcp = netcp;
1108 p_info.tx_pipe = NULL;
1109 p_info.psdata_len = 0;
1110 p_info.ts_context = NULL;
1111 p_info.txtstamp_complete = NULL;
1112 p_info.epib = desc->epib;
1113 p_info.psdata = desc->psdata;
1114 memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(u32));
1116 /* Find out where to inject the packet for transmission */
1117 list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) {
1118 ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data,
1120 if (unlikely(ret != 0)) {
1121 dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n",
1122 tx_hook->order, ret);
1123 ret = (ret < 0) ? ret : NETDEV_TX_OK;
1128 /* Make sure some TX hook claimed the packet */
1129 tx_pipe = p_info.tx_pipe;
1131 dev_err(netcp->ndev_dev, "No TX hook claimed the packet!\n");
1136 /* update descriptor */
1137 if (p_info.psdata_len) {
1138 u32 *psdata = p_info.psdata;
1140 memmove(p_info.psdata, p_info.psdata + p_info.psdata_len,
1142 set_words(psdata, p_info.psdata_len, psdata);
1143 tmp |= (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) <<
1144 KNAV_DMA_DESC_PSLEN_SHIFT;
1147 tmp |= KNAV_DMA_DESC_HAS_EPIB |
1148 ((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<
1149 KNAV_DMA_DESC_RETQ_SHIFT);
1151 if (!(tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO)) {
1152 tmp |= ((tx_pipe->switch_to_port & KNAV_DMA_DESC_PSFLAG_MASK) <<
1153 KNAV_DMA_DESC_PSFLAG_SHIFT);
1156 set_words(&tmp, 1, &desc->packet_info);
1157 set_words((u32 *)&skb, 1, &desc->pad[0]);
1159 if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) {
1160 tmp = tx_pipe->switch_to_port;
1161 set_words((u32 *)&tmp, 1, &desc->tag_info);
1164 /* submit packet descriptor */
1165 ret = knav_pool_desc_map(netcp->tx_pool, desc, sizeof(*desc), &dma,
1167 if (unlikely(ret)) {
1168 dev_err(netcp->ndev_dev, "%s() failed to map desc\n", __func__);
1172 skb_tx_timestamp(skb);
1173 knav_queue_push(tx_pipe->dma_queue, dma, dma_sz, 0);
1179 /* Submit the packet */
1180 static int netcp_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1182 struct netcp_intf *netcp = netdev_priv(ndev);
1183 int subqueue = skb_get_queue_mapping(skb);
1184 struct knav_dma_desc *desc;
1185 int desc_count, ret = 0;
1187 if (unlikely(skb->len <= 0)) {
1189 return NETDEV_TX_OK;
1192 if (unlikely(skb->len < NETCP_MIN_PACKET_SIZE)) {
1193 ret = skb_padto(skb, NETCP_MIN_PACKET_SIZE);
1195 /* If we get here, the skb has already been dropped */
1196 dev_warn(netcp->ndev_dev, "padding failed (%d), packet dropped\n",
1198 ndev->stats.tx_dropped++;
1201 skb->len = NETCP_MIN_PACKET_SIZE;
1204 desc = netcp_tx_map_skb(skb, netcp);
1205 if (unlikely(!desc)) {
1206 netif_stop_subqueue(ndev, subqueue);
1211 ret = netcp_tx_submit_skb(netcp, skb, desc);
1215 ndev->trans_start = jiffies;
1217 /* Check Tx pool count & stop subqueue if needed */
1218 desc_count = knav_pool_count(netcp->tx_pool);
1219 if (desc_count < netcp->tx_pause_threshold) {
1220 dev_dbg(netcp->ndev_dev, "pausing tx, count(%d)\n", desc_count);
1221 netif_stop_subqueue(ndev, subqueue);
1223 return NETDEV_TX_OK;
1226 ndev->stats.tx_dropped++;
1228 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
1233 int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe)
1235 if (tx_pipe->dma_channel) {
1236 knav_dma_close_channel(tx_pipe->dma_channel);
1237 tx_pipe->dma_channel = NULL;
1241 EXPORT_SYMBOL_GPL(netcp_txpipe_close);
1243 int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe)
1245 struct device *dev = tx_pipe->netcp_device->device;
1246 struct knav_dma_cfg config;
1250 memset(&config, 0, sizeof(config));
1251 config.direction = DMA_MEM_TO_DEV;
1252 config.u.tx.filt_einfo = false;
1253 config.u.tx.filt_pswords = false;
1254 config.u.tx.priority = DMA_PRIO_MED_L;
1256 tx_pipe->dma_channel = knav_dma_open_channel(dev,
1257 tx_pipe->dma_chan_name, &config);
1258 if (IS_ERR_OR_NULL(tx_pipe->dma_channel)) {
1259 dev_err(dev, "failed opening tx chan(%s)\n",
1260 tx_pipe->dma_chan_name);
1264 snprintf(name, sizeof(name), "tx-pipe-%s", dev_name(dev));
1265 tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id,
1267 if (IS_ERR(tx_pipe->dma_queue)) {
1268 dev_err(dev, "Could not open DMA queue for channel \"%s\": %d\n",
1270 ret = PTR_ERR(tx_pipe->dma_queue);
1274 dev_dbg(dev, "opened tx pipe %s\n", name);
1278 if (!IS_ERR_OR_NULL(tx_pipe->dma_channel))
1279 knav_dma_close_channel(tx_pipe->dma_channel);
1280 tx_pipe->dma_channel = NULL;
1283 EXPORT_SYMBOL_GPL(netcp_txpipe_open);
1285 int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,
1286 struct netcp_device *netcp_device,
1287 const char *dma_chan_name, unsigned int dma_queue_id)
1289 memset(tx_pipe, 0, sizeof(*tx_pipe));
1290 tx_pipe->netcp_device = netcp_device;
1291 tx_pipe->dma_chan_name = dma_chan_name;
1292 tx_pipe->dma_queue_id = dma_queue_id;
1295 EXPORT_SYMBOL_GPL(netcp_txpipe_init);
1297 static struct netcp_addr *netcp_addr_find(struct netcp_intf *netcp,
1299 enum netcp_addr_type type)
1301 struct netcp_addr *naddr;
1303 list_for_each_entry(naddr, &netcp->addr_list, node) {
1304 if (naddr->type != type)
1306 if (addr && memcmp(addr, naddr->addr, ETH_ALEN))
1314 static struct netcp_addr *netcp_addr_add(struct netcp_intf *netcp,
1316 enum netcp_addr_type type)
1318 struct netcp_addr *naddr;
1320 naddr = devm_kmalloc(netcp->dev, sizeof(*naddr), GFP_ATOMIC);
1326 naddr->netcp = netcp;
1328 ether_addr_copy(naddr->addr, addr);
1330 eth_zero_addr(naddr->addr);
1331 list_add_tail(&naddr->node, &netcp->addr_list);
1336 static void netcp_addr_del(struct netcp_intf *netcp, struct netcp_addr *naddr)
1338 list_del(&naddr->node);
1339 devm_kfree(netcp->dev, naddr);
1342 static void netcp_addr_clear_mark(struct netcp_intf *netcp)
1344 struct netcp_addr *naddr;
1346 list_for_each_entry(naddr, &netcp->addr_list, node)
1350 static void netcp_addr_add_mark(struct netcp_intf *netcp, const u8 *addr,
1351 enum netcp_addr_type type)
1353 struct netcp_addr *naddr;
1355 naddr = netcp_addr_find(netcp, addr, type);
1357 naddr->flags |= ADDR_VALID;
1361 naddr = netcp_addr_add(netcp, addr, type);
1362 if (!WARN_ON(!naddr))
1363 naddr->flags |= ADDR_NEW;
1366 static void netcp_addr_sweep_del(struct netcp_intf *netcp)
1368 struct netcp_addr *naddr, *tmp;
1369 struct netcp_intf_modpriv *priv;
1370 struct netcp_module *module;
1373 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
1374 if (naddr->flags & (ADDR_VALID | ADDR_NEW))
1376 dev_dbg(netcp->ndev_dev, "deleting address %pM, type %x\n",
1377 naddr->addr, naddr->type);
1378 mutex_lock(&netcp_modules_lock);
1379 for_each_module(netcp, priv) {
1380 module = priv->netcp_module;
1381 if (!module->del_addr)
1383 error = module->del_addr(priv->module_priv,
1387 mutex_unlock(&netcp_modules_lock);
1388 netcp_addr_del(netcp, naddr);
1392 static void netcp_addr_sweep_add(struct netcp_intf *netcp)
1394 struct netcp_addr *naddr, *tmp;
1395 struct netcp_intf_modpriv *priv;
1396 struct netcp_module *module;
1399 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
1400 if (!(naddr->flags & ADDR_NEW))
1402 dev_dbg(netcp->ndev_dev, "adding address %pM, type %x\n",
1403 naddr->addr, naddr->type);
1404 mutex_lock(&netcp_modules_lock);
1405 for_each_module(netcp, priv) {
1406 module = priv->netcp_module;
1407 if (!module->add_addr)
1409 error = module->add_addr(priv->module_priv, naddr);
1412 mutex_unlock(&netcp_modules_lock);
1416 static void netcp_set_rx_mode(struct net_device *ndev)
1418 struct netcp_intf *netcp = netdev_priv(ndev);
1419 struct netdev_hw_addr *ndev_addr;
1422 promisc = (ndev->flags & IFF_PROMISC ||
1423 ndev->flags & IFF_ALLMULTI ||
1424 netdev_mc_count(ndev) > NETCP_MAX_MCAST_ADDR);
1426 /* first clear all marks */
1427 netcp_addr_clear_mark(netcp);
1429 /* next add new entries, mark existing ones */
1430 netcp_addr_add_mark(netcp, ndev->broadcast, ADDR_BCAST);
1431 for_each_dev_addr(ndev, ndev_addr)
1432 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_DEV);
1433 netdev_for_each_uc_addr(ndev_addr, ndev)
1434 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_UCAST);
1435 netdev_for_each_mc_addr(ndev_addr, ndev)
1436 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_MCAST);
1439 netcp_addr_add_mark(netcp, NULL, ADDR_ANY);
1441 /* finally sweep and callout into modules */
1442 netcp_addr_sweep_del(netcp);
1443 netcp_addr_sweep_add(netcp);
1446 static void netcp_free_navigator_resources(struct netcp_intf *netcp)
1450 if (netcp->rx_channel) {
1451 knav_dma_close_channel(netcp->rx_channel);
1452 netcp->rx_channel = NULL;
1455 if (!IS_ERR_OR_NULL(netcp->rx_pool))
1456 netcp_rxpool_free(netcp);
1458 if (!IS_ERR_OR_NULL(netcp->rx_queue)) {
1459 knav_queue_close(netcp->rx_queue);
1460 netcp->rx_queue = NULL;
1463 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
1464 !IS_ERR_OR_NULL(netcp->rx_fdq[i]) ; ++i) {
1465 knav_queue_close(netcp->rx_fdq[i]);
1466 netcp->rx_fdq[i] = NULL;
1469 if (!IS_ERR_OR_NULL(netcp->tx_compl_q)) {
1470 knav_queue_close(netcp->tx_compl_q);
1471 netcp->tx_compl_q = NULL;
1474 if (!IS_ERR_OR_NULL(netcp->tx_pool)) {
1475 knav_pool_destroy(netcp->tx_pool);
1476 netcp->tx_pool = NULL;
1480 static int netcp_setup_navigator_resources(struct net_device *ndev)
1482 struct netcp_intf *netcp = netdev_priv(ndev);
1483 struct knav_queue_notify_config notify_cfg;
1484 struct knav_dma_cfg config;
1490 /* Create Rx/Tx descriptor pools */
1491 snprintf(name, sizeof(name), "rx-pool-%s", ndev->name);
1492 netcp->rx_pool = knav_pool_create(name, netcp->rx_pool_size,
1493 netcp->rx_pool_region_id);
1494 if (IS_ERR_OR_NULL(netcp->rx_pool)) {
1495 dev_err(netcp->ndev_dev, "Couldn't create rx pool\n");
1496 ret = PTR_ERR(netcp->rx_pool);
1500 snprintf(name, sizeof(name), "tx-pool-%s", ndev->name);
1501 netcp->tx_pool = knav_pool_create(name, netcp->tx_pool_size,
1502 netcp->tx_pool_region_id);
1503 if (IS_ERR_OR_NULL(netcp->tx_pool)) {
1504 dev_err(netcp->ndev_dev, "Couldn't create tx pool\n");
1505 ret = PTR_ERR(netcp->tx_pool);
1509 /* open Tx completion queue */
1510 snprintf(name, sizeof(name), "tx-compl-%s", ndev->name);
1511 netcp->tx_compl_q = knav_queue_open(name, netcp->tx_compl_qid, 0);
1512 if (IS_ERR_OR_NULL(netcp->tx_compl_q)) {
1513 ret = PTR_ERR(netcp->tx_compl_q);
1516 netcp->tx_compl_qid = knav_queue_get_id(netcp->tx_compl_q);
1518 /* Set notification for Tx completion */
1519 notify_cfg.fn = netcp_tx_notify;
1520 notify_cfg.fn_arg = netcp;
1521 ret = knav_queue_device_control(netcp->tx_compl_q,
1522 KNAV_QUEUE_SET_NOTIFIER,
1523 (unsigned long)¬ify_cfg);
1527 knav_queue_disable_notify(netcp->tx_compl_q);
1529 /* open Rx completion queue */
1530 snprintf(name, sizeof(name), "rx-compl-%s", ndev->name);
1531 netcp->rx_queue = knav_queue_open(name, netcp->rx_queue_id, 0);
1532 if (IS_ERR_OR_NULL(netcp->rx_queue)) {
1533 ret = PTR_ERR(netcp->rx_queue);
1536 netcp->rx_queue_id = knav_queue_get_id(netcp->rx_queue);
1538 /* Set notification for Rx completion */
1539 notify_cfg.fn = netcp_rx_notify;
1540 notify_cfg.fn_arg = netcp;
1541 ret = knav_queue_device_control(netcp->rx_queue,
1542 KNAV_QUEUE_SET_NOTIFIER,
1543 (unsigned long)¬ify_cfg);
1547 knav_queue_disable_notify(netcp->rx_queue);
1550 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
1551 netcp->rx_queue_depths[i] && netcp->rx_buffer_sizes[i]; ++i) {
1552 snprintf(name, sizeof(name), "rx-fdq-%s-%d", ndev->name, i);
1553 netcp->rx_fdq[i] = knav_queue_open(name, KNAV_QUEUE_GP, 0);
1554 if (IS_ERR_OR_NULL(netcp->rx_fdq[i])) {
1555 ret = PTR_ERR(netcp->rx_fdq[i]);
1560 memset(&config, 0, sizeof(config));
1561 config.direction = DMA_DEV_TO_MEM;
1562 config.u.rx.einfo_present = true;
1563 config.u.rx.psinfo_present = true;
1564 config.u.rx.err_mode = DMA_DROP;
1565 config.u.rx.desc_type = DMA_DESC_HOST;
1566 config.u.rx.psinfo_at_sop = false;
1567 config.u.rx.sop_offset = NETCP_SOP_OFFSET;
1568 config.u.rx.dst_q = netcp->rx_queue_id;
1569 config.u.rx.thresh = DMA_THRESH_NONE;
1571 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN; ++i) {
1572 if (netcp->rx_fdq[i])
1573 last_fdq = knav_queue_get_id(netcp->rx_fdq[i]);
1574 config.u.rx.fdq[i] = last_fdq;
1577 netcp->rx_channel = knav_dma_open_channel(netcp->netcp_device->device,
1578 netcp->dma_chan_name, &config);
1579 if (IS_ERR_OR_NULL(netcp->rx_channel)) {
1580 dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n",
1581 netcp->dma_chan_name);
1585 dev_dbg(netcp->ndev_dev, "opened RX channel: %p\n", netcp->rx_channel);
1589 netcp_free_navigator_resources(netcp);
1593 /* Open the device */
1594 static int netcp_ndo_open(struct net_device *ndev)
1596 struct netcp_intf *netcp = netdev_priv(ndev);
1597 struct netcp_intf_modpriv *intf_modpriv;
1598 struct netcp_module *module;
1601 netif_carrier_off(ndev);
1602 ret = netcp_setup_navigator_resources(ndev);
1604 dev_err(netcp->ndev_dev, "Failed to setup navigator resources\n");
1608 mutex_lock(&netcp_modules_lock);
1609 for_each_module(netcp, intf_modpriv) {
1610 module = intf_modpriv->netcp_module;
1612 ret = module->open(intf_modpriv->module_priv, ndev);
1614 dev_err(netcp->ndev_dev, "module open failed\n");
1619 mutex_unlock(&netcp_modules_lock);
1621 netcp_rxpool_refill(netcp);
1622 napi_enable(&netcp->rx_napi);
1623 napi_enable(&netcp->tx_napi);
1624 knav_queue_enable_notify(netcp->tx_compl_q);
1625 knav_queue_enable_notify(netcp->rx_queue);
1626 netif_tx_wake_all_queues(ndev);
1627 dev_dbg(netcp->ndev_dev, "netcp device %s opened\n", ndev->name);
1631 for_each_module(netcp, intf_modpriv) {
1632 module = intf_modpriv->netcp_module;
1634 module->close(intf_modpriv->module_priv, ndev);
1636 mutex_unlock(&netcp_modules_lock);
1639 netcp_free_navigator_resources(netcp);
1643 /* Close the device */
1644 static int netcp_ndo_stop(struct net_device *ndev)
1646 struct netcp_intf *netcp = netdev_priv(ndev);
1647 struct netcp_intf_modpriv *intf_modpriv;
1648 struct netcp_module *module;
1651 netif_tx_stop_all_queues(ndev);
1652 netif_carrier_off(ndev);
1653 netcp_addr_clear_mark(netcp);
1654 netcp_addr_sweep_del(netcp);
1655 knav_queue_disable_notify(netcp->rx_queue);
1656 knav_queue_disable_notify(netcp->tx_compl_q);
1657 napi_disable(&netcp->rx_napi);
1658 napi_disable(&netcp->tx_napi);
1660 mutex_lock(&netcp_modules_lock);
1661 for_each_module(netcp, intf_modpriv) {
1662 module = intf_modpriv->netcp_module;
1663 if (module->close) {
1664 err = module->close(intf_modpriv->module_priv, ndev);
1666 dev_err(netcp->ndev_dev, "Close failed\n");
1669 mutex_unlock(&netcp_modules_lock);
1671 /* Recycle Rx descriptors from completion queue */
1672 netcp_empty_rx_queue(netcp);
1674 /* Recycle Tx descriptors from completion queue */
1675 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
1677 if (knav_pool_count(netcp->tx_pool) != netcp->tx_pool_size)
1678 dev_err(netcp->ndev_dev, "Lost (%d) Tx descs\n",
1679 netcp->tx_pool_size - knav_pool_count(netcp->tx_pool));
1681 netcp_free_navigator_resources(netcp);
1682 dev_dbg(netcp->ndev_dev, "netcp device %s stopped\n", ndev->name);
1686 static int netcp_ndo_ioctl(struct net_device *ndev,
1687 struct ifreq *req, int cmd)
1689 struct netcp_intf *netcp = netdev_priv(ndev);
1690 struct netcp_intf_modpriv *intf_modpriv;
1691 struct netcp_module *module;
1692 int ret = -1, err = -EOPNOTSUPP;
1694 if (!netif_running(ndev))
1697 mutex_lock(&netcp_modules_lock);
1698 for_each_module(netcp, intf_modpriv) {
1699 module = intf_modpriv->netcp_module;
1703 err = module->ioctl(intf_modpriv->module_priv, req, cmd);
1704 if ((err < 0) && (err != -EOPNOTSUPP)) {
1713 mutex_unlock(&netcp_modules_lock);
1714 return (ret == 0) ? 0 : err;
1717 static int netcp_ndo_change_mtu(struct net_device *ndev, int new_mtu)
1719 struct netcp_intf *netcp = netdev_priv(ndev);
1721 /* MTU < 68 is an error for IPv4 traffic */
1722 if ((new_mtu < 68) ||
1723 (new_mtu > (NETCP_MAX_FRAME_SIZE - ETH_HLEN - ETH_FCS_LEN))) {
1724 dev_err(netcp->ndev_dev, "Invalid mtu size = %d\n", new_mtu);
1728 ndev->mtu = new_mtu;
1732 static void netcp_ndo_tx_timeout(struct net_device *ndev)
1734 struct netcp_intf *netcp = netdev_priv(ndev);
1735 unsigned int descs = knav_pool_count(netcp->tx_pool);
1737 dev_err(netcp->ndev_dev, "transmit timed out tx descs(%d)\n", descs);
1738 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
1739 ndev->trans_start = jiffies;
1740 netif_tx_wake_all_queues(ndev);
1743 static int netcp_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid)
1745 struct netcp_intf *netcp = netdev_priv(ndev);
1746 struct netcp_intf_modpriv *intf_modpriv;
1747 struct netcp_module *module;
1750 dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid);
1752 mutex_lock(&netcp_modules_lock);
1753 for_each_module(netcp, intf_modpriv) {
1754 module = intf_modpriv->netcp_module;
1755 if ((module->add_vid) && (vid != 0)) {
1756 err = module->add_vid(intf_modpriv->module_priv, vid);
1758 dev_err(netcp->ndev_dev, "Could not add vlan id = %d\n",
1764 mutex_unlock(&netcp_modules_lock);
1768 static int netcp_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid)
1770 struct netcp_intf *netcp = netdev_priv(ndev);
1771 struct netcp_intf_modpriv *intf_modpriv;
1772 struct netcp_module *module;
1775 dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid);
1777 mutex_lock(&netcp_modules_lock);
1778 for_each_module(netcp, intf_modpriv) {
1779 module = intf_modpriv->netcp_module;
1780 if (module->del_vid) {
1781 err = module->del_vid(intf_modpriv->module_priv, vid);
1783 dev_err(netcp->ndev_dev, "Could not delete vlan id = %d\n",
1789 mutex_unlock(&netcp_modules_lock);
1793 static u16 netcp_select_queue(struct net_device *dev, struct sk_buff *skb,
1795 select_queue_fallback_t fallback)
1800 static int netcp_setup_tc(struct net_device *dev, u8 num_tc)
1804 /* setup tc must be called under rtnl lock */
1807 /* Sanity-check the number of traffic classes requested */
1808 if ((dev->real_num_tx_queues <= 1) ||
1809 (dev->real_num_tx_queues < num_tc))
1812 /* Configure traffic class to queue mappings */
1814 netdev_set_num_tc(dev, num_tc);
1815 for (i = 0; i < num_tc; i++)
1816 netdev_set_tc_queue(dev, i, 1, i);
1818 netdev_reset_tc(dev);
1824 static const struct net_device_ops netcp_netdev_ops = {
1825 .ndo_open = netcp_ndo_open,
1826 .ndo_stop = netcp_ndo_stop,
1827 .ndo_start_xmit = netcp_ndo_start_xmit,
1828 .ndo_set_rx_mode = netcp_set_rx_mode,
1829 .ndo_do_ioctl = netcp_ndo_ioctl,
1830 .ndo_change_mtu = netcp_ndo_change_mtu,
1831 .ndo_set_mac_address = eth_mac_addr,
1832 .ndo_validate_addr = eth_validate_addr,
1833 .ndo_vlan_rx_add_vid = netcp_rx_add_vid,
1834 .ndo_vlan_rx_kill_vid = netcp_rx_kill_vid,
1835 .ndo_tx_timeout = netcp_ndo_tx_timeout,
1836 .ndo_select_queue = netcp_select_queue,
1837 .ndo_setup_tc = netcp_setup_tc,
1840 static int netcp_create_interface(struct netcp_device *netcp_device,
1841 struct device_node *node_interface)
1843 struct device *dev = netcp_device->device;
1844 struct device_node *node = dev->of_node;
1845 struct netcp_intf *netcp;
1846 struct net_device *ndev;
1847 resource_size_t size;
1848 struct resource res;
1849 void __iomem *efuse = NULL;
1851 const void *mac_addr;
1852 u8 efuse_mac_addr[6];
1856 ndev = alloc_etherdev_mqs(sizeof(*netcp), 1, 1);
1858 dev_err(dev, "Error allocating netdev\n");
1862 ndev->features |= NETIF_F_SG;
1863 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1864 ndev->hw_features = ndev->features;
1865 ndev->vlan_features |= NETIF_F_SG;
1867 netcp = netdev_priv(ndev);
1868 spin_lock_init(&netcp->lock);
1869 INIT_LIST_HEAD(&netcp->module_head);
1870 INIT_LIST_HEAD(&netcp->txhook_list_head);
1871 INIT_LIST_HEAD(&netcp->rxhook_list_head);
1872 INIT_LIST_HEAD(&netcp->addr_list);
1873 netcp->netcp_device = netcp_device;
1874 netcp->dev = netcp_device->device;
1876 netcp->ndev_dev = &ndev->dev;
1877 netcp->msg_enable = netif_msg_init(netcp_debug_level, NETCP_DEBUG);
1878 netcp->tx_pause_threshold = MAX_SKB_FRAGS;
1879 netcp->tx_resume_threshold = netcp->tx_pause_threshold;
1880 netcp->node_interface = node_interface;
1882 ret = of_property_read_u32(node_interface, "efuse-mac", &efuse_mac);
1884 if (of_address_to_resource(node, NETCP_EFUSE_REG_INDEX, &res)) {
1885 dev_err(dev, "could not find efuse-mac reg resource\n");
1889 size = resource_size(&res);
1891 if (!devm_request_mem_region(dev, res.start, size,
1893 dev_err(dev, "could not reserve resource\n");
1898 efuse = devm_ioremap_nocache(dev, res.start, size);
1900 dev_err(dev, "could not map resource\n");
1901 devm_release_mem_region(dev, res.start, size);
1906 emac_arch_get_mac_addr(efuse_mac_addr, efuse);
1907 if (is_valid_ether_addr(efuse_mac_addr))
1908 ether_addr_copy(ndev->dev_addr, efuse_mac_addr);
1910 random_ether_addr(ndev->dev_addr);
1912 devm_iounmap(dev, efuse);
1913 devm_release_mem_region(dev, res.start, size);
1915 mac_addr = of_get_mac_address(node_interface);
1917 ether_addr_copy(ndev->dev_addr, mac_addr);
1919 random_ether_addr(ndev->dev_addr);
1922 ret = of_property_read_string(node_interface, "rx-channel",
1923 &netcp->dma_chan_name);
1925 dev_err(dev, "missing \"rx-channel\" parameter\n");
1930 ret = of_property_read_u32(node_interface, "rx-queue",
1931 &netcp->rx_queue_id);
1933 dev_warn(dev, "missing \"rx-queue\" parameter\n");
1934 netcp->rx_queue_id = KNAV_QUEUE_QPEND;
1937 ret = of_property_read_u32_array(node_interface, "rx-queue-depth",
1938 netcp->rx_queue_depths,
1939 KNAV_DMA_FDQ_PER_CHAN);
1941 dev_err(dev, "missing \"rx-queue-depth\" parameter\n");
1942 netcp->rx_queue_depths[0] = 128;
1945 ret = of_property_read_u32_array(node_interface, "rx-buffer-size",
1946 netcp->rx_buffer_sizes,
1947 KNAV_DMA_FDQ_PER_CHAN);
1949 dev_err(dev, "missing \"rx-buffer-size\" parameter\n");
1950 netcp->rx_buffer_sizes[0] = 1536;
1953 ret = of_property_read_u32_array(node_interface, "rx-pool", temp, 2);
1955 dev_err(dev, "missing \"rx-pool\" parameter\n");
1959 netcp->rx_pool_size = temp[0];
1960 netcp->rx_pool_region_id = temp[1];
1962 ret = of_property_read_u32_array(node_interface, "tx-pool", temp, 2);
1964 dev_err(dev, "missing \"tx-pool\" parameter\n");
1968 netcp->tx_pool_size = temp[0];
1969 netcp->tx_pool_region_id = temp[1];
1971 if (netcp->tx_pool_size < MAX_SKB_FRAGS) {
1972 dev_err(dev, "tx-pool size too small, must be atleast(%ld)\n",
1978 ret = of_property_read_u32(node_interface, "tx-completion-queue",
1979 &netcp->tx_compl_qid);
1981 dev_warn(dev, "missing \"tx-completion-queue\" parameter\n");
1982 netcp->tx_compl_qid = KNAV_QUEUE_QPEND;
1986 netif_napi_add(ndev, &netcp->rx_napi, netcp_rx_poll, NETCP_NAPI_WEIGHT);
1987 netif_napi_add(ndev, &netcp->tx_napi, netcp_tx_poll, NETCP_NAPI_WEIGHT);
1989 /* Register the network device */
1991 ndev->watchdog_timeo = NETCP_TX_TIMEOUT;
1992 ndev->netdev_ops = &netcp_netdev_ops;
1993 SET_NETDEV_DEV(ndev, dev);
1995 list_add_tail(&netcp->interface_list, &netcp_device->interface_head);
2003 static void netcp_delete_interface(struct netcp_device *netcp_device,
2004 struct net_device *ndev)
2006 struct netcp_intf_modpriv *intf_modpriv, *tmp;
2007 struct netcp_intf *netcp = netdev_priv(ndev);
2008 struct netcp_module *module;
2010 dev_dbg(netcp_device->device, "Removing interface \"%s\"\n",
2013 /* Notify each of the modules that the interface is going away */
2014 list_for_each_entry_safe(intf_modpriv, tmp, &netcp->module_head,
2016 module = intf_modpriv->netcp_module;
2017 dev_dbg(netcp_device->device, "Releasing module \"%s\"\n",
2019 if (module->release)
2020 module->release(intf_modpriv->module_priv);
2021 list_del(&intf_modpriv->intf_list);
2022 kfree(intf_modpriv);
2024 WARN(!list_empty(&netcp->module_head), "%s interface module list is not empty!\n",
2027 list_del(&netcp->interface_list);
2029 of_node_put(netcp->node_interface);
2030 unregister_netdev(ndev);
2031 netif_napi_del(&netcp->rx_napi);
2035 static int netcp_probe(struct platform_device *pdev)
2037 struct device_node *node = pdev->dev.of_node;
2038 struct netcp_intf *netcp_intf, *netcp_tmp;
2039 struct device_node *child, *interfaces;
2040 struct netcp_device *netcp_device;
2041 struct device *dev = &pdev->dev;
2042 struct netcp_module *module;
2046 dev_err(dev, "could not find device info\n");
2050 /* Allocate a new NETCP device instance */
2051 netcp_device = devm_kzalloc(dev, sizeof(*netcp_device), GFP_KERNEL);
2055 pm_runtime_enable(&pdev->dev);
2056 ret = pm_runtime_get_sync(&pdev->dev);
2058 dev_err(dev, "Failed to enable NETCP power-domain\n");
2059 pm_runtime_disable(&pdev->dev);
2063 /* Initialize the NETCP device instance */
2064 INIT_LIST_HEAD(&netcp_device->interface_head);
2065 INIT_LIST_HEAD(&netcp_device->modpriv_head);
2066 netcp_device->device = dev;
2067 platform_set_drvdata(pdev, netcp_device);
2069 /* create interfaces */
2070 interfaces = of_get_child_by_name(node, "netcp-interfaces");
2072 dev_err(dev, "could not find netcp-interfaces node\n");
2077 for_each_available_child_of_node(interfaces, child) {
2078 ret = netcp_create_interface(netcp_device, child);
2080 dev_err(dev, "could not create interface(%s)\n",
2082 goto probe_quit_interface;
2086 /* Add the device instance to the list */
2087 list_add_tail(&netcp_device->device_list, &netcp_devices);
2089 /* Probe & attach any modules already registered */
2090 mutex_lock(&netcp_modules_lock);
2091 for_each_netcp_module(module) {
2092 ret = netcp_module_probe(netcp_device, module);
2094 dev_err(dev, "module(%s) probe failed\n", module->name);
2096 mutex_unlock(&netcp_modules_lock);
2099 probe_quit_interface:
2100 list_for_each_entry_safe(netcp_intf, netcp_tmp,
2101 &netcp_device->interface_head,
2103 netcp_delete_interface(netcp_device, netcp_intf->ndev);
2107 pm_runtime_put_sync(&pdev->dev);
2108 pm_runtime_disable(&pdev->dev);
2109 platform_set_drvdata(pdev, NULL);
2113 static int netcp_remove(struct platform_device *pdev)
2115 struct netcp_device *netcp_device = platform_get_drvdata(pdev);
2116 struct netcp_inst_modpriv *inst_modpriv, *tmp;
2117 struct netcp_module *module;
2119 list_for_each_entry_safe(inst_modpriv, tmp, &netcp_device->modpriv_head,
2121 module = inst_modpriv->netcp_module;
2122 dev_dbg(&pdev->dev, "Removing module \"%s\"\n", module->name);
2123 module->remove(netcp_device, inst_modpriv->module_priv);
2124 list_del(&inst_modpriv->inst_list);
2125 kfree(inst_modpriv);
2127 WARN(!list_empty(&netcp_device->interface_head), "%s interface list not empty!\n",
2130 devm_kfree(&pdev->dev, netcp_device);
2131 pm_runtime_put_sync(&pdev->dev);
2132 pm_runtime_disable(&pdev->dev);
2133 platform_set_drvdata(pdev, NULL);
2137 static const struct of_device_id of_match[] = {
2138 { .compatible = "ti,netcp-1.0", },
2141 MODULE_DEVICE_TABLE(of, of_match);
2143 static struct platform_driver netcp_driver = {
2145 .name = "netcp-1.0",
2146 .owner = THIS_MODULE,
2147 .of_match_table = of_match,
2149 .probe = netcp_probe,
2150 .remove = netcp_remove,
2152 module_platform_driver(netcp_driver);
2154 MODULE_LICENSE("GPL v2");
2155 MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs");
2156 MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com");