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_PACKET_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN)
38 #define NETCP_MIN_PACKET_SIZE ETH_ZLEN
39 #define NETCP_MAX_MCAST_ADDR 16
41 #define NETCP_EFUSE_REG_INDEX 0
43 #define NETCP_MOD_PROBE_SKIPPED 1
44 #define NETCP_MOD_PROBE_FAILED 2
46 #define NETCP_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \
47 NETIF_MSG_DRV | NETIF_MSG_LINK | \
48 NETIF_MSG_IFUP | NETIF_MSG_INTR | \
49 NETIF_MSG_PROBE | NETIF_MSG_TIMER | \
50 NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \
51 NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \
52 NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \
55 #define NETCP_EFUSE_ADDR_SWAP 2
57 #define knav_queue_get_id(q) knav_queue_device_control(q, \
58 KNAV_QUEUE_GET_ID, (unsigned long)NULL)
60 #define knav_queue_enable_notify(q) knav_queue_device_control(q, \
61 KNAV_QUEUE_ENABLE_NOTIFY, \
64 #define knav_queue_disable_notify(q) knav_queue_device_control(q, \
65 KNAV_QUEUE_DISABLE_NOTIFY, \
68 #define knav_queue_get_count(q) knav_queue_device_control(q, \
69 KNAV_QUEUE_GET_COUNT, (unsigned long)NULL)
71 #define for_each_netcp_module(module) \
72 list_for_each_entry(module, &netcp_modules, module_list)
74 #define for_each_netcp_device_module(netcp_device, inst_modpriv) \
75 list_for_each_entry(inst_modpriv, \
76 &((netcp_device)->modpriv_head), inst_list)
78 #define for_each_module(netcp, intf_modpriv) \
79 list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list)
81 /* Module management structures */
83 struct list_head device_list;
84 struct list_head interface_head;
85 struct list_head modpriv_head;
86 struct device *device;
89 struct netcp_inst_modpriv {
90 struct netcp_device *netcp_device;
91 struct netcp_module *netcp_module;
92 struct list_head inst_list;
96 struct netcp_intf_modpriv {
97 struct netcp_intf *netcp_priv;
98 struct netcp_module *netcp_module;
99 struct list_head intf_list;
103 static LIST_HEAD(netcp_devices);
104 static LIST_HEAD(netcp_modules);
105 static DEFINE_MUTEX(netcp_modules_lock);
107 static int netcp_debug_level = -1;
108 module_param(netcp_debug_level, int, 0);
109 MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");
111 /* Helper functions - Get/Set */
112 static void get_pkt_info(dma_addr_t *buff, u32 *buff_len, dma_addr_t *ndesc,
113 struct knav_dma_desc *desc)
115 *buff_len = le32_to_cpu(desc->buff_len);
116 *buff = le32_to_cpu(desc->buff);
117 *ndesc = le32_to_cpu(desc->next_desc);
120 static u32 get_sw_data(int index, struct knav_dma_desc *desc)
122 /* No Endian conversion needed as this data is untouched by hw */
123 return desc->sw_data[index];
126 /* use these macros to get sw data */
127 #define GET_SW_DATA0(desc) get_sw_data(0, desc)
128 #define GET_SW_DATA1(desc) get_sw_data(1, desc)
129 #define GET_SW_DATA2(desc) get_sw_data(2, desc)
130 #define GET_SW_DATA3(desc) get_sw_data(3, desc)
132 static void get_org_pkt_info(dma_addr_t *buff, u32 *buff_len,
133 struct knav_dma_desc *desc)
135 *buff = le32_to_cpu(desc->orig_buff);
136 *buff_len = le32_to_cpu(desc->orig_len);
139 static void get_words(dma_addr_t *words, int num_words, __le32 *desc)
143 for (i = 0; i < num_words; i++)
144 words[i] = le32_to_cpu(desc[i]);
147 static void set_pkt_info(dma_addr_t buff, u32 buff_len, u32 ndesc,
148 struct knav_dma_desc *desc)
150 desc->buff_len = cpu_to_le32(buff_len);
151 desc->buff = cpu_to_le32(buff);
152 desc->next_desc = cpu_to_le32(ndesc);
155 static void set_desc_info(u32 desc_info, u32 pkt_info,
156 struct knav_dma_desc *desc)
158 desc->desc_info = cpu_to_le32(desc_info);
159 desc->packet_info = cpu_to_le32(pkt_info);
162 static void set_sw_data(int index, u32 data, struct knav_dma_desc *desc)
164 /* No Endian conversion needed as this data is untouched by hw */
165 desc->sw_data[index] = data;
168 /* use these macros to set sw data */
169 #define SET_SW_DATA0(data, desc) set_sw_data(0, data, desc)
170 #define SET_SW_DATA1(data, desc) set_sw_data(1, data, desc)
171 #define SET_SW_DATA2(data, desc) set_sw_data(2, data, desc)
172 #define SET_SW_DATA3(data, desc) set_sw_data(3, data, desc)
174 static void set_org_pkt_info(dma_addr_t buff, u32 buff_len,
175 struct knav_dma_desc *desc)
177 desc->orig_buff = cpu_to_le32(buff);
178 desc->orig_len = cpu_to_le32(buff_len);
181 static void set_words(u32 *words, int num_words, __le32 *desc)
185 for (i = 0; i < num_words; i++)
186 desc[i] = cpu_to_le32(words[i]);
189 /* Read the e-fuse value as 32 bit values to be endian independent */
190 static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac, u32 swap)
192 unsigned int addr0, addr1;
194 addr1 = readl(efuse_mac + 4);
195 addr0 = readl(efuse_mac);
198 case NETCP_EFUSE_ADDR_SWAP:
200 addr1 = readl(efuse_mac);
206 x[0] = (addr1 & 0x0000ff00) >> 8;
207 x[1] = addr1 & 0x000000ff;
208 x[2] = (addr0 & 0xff000000) >> 24;
209 x[3] = (addr0 & 0x00ff0000) >> 16;
210 x[4] = (addr0 & 0x0000ff00) >> 8;
211 x[5] = addr0 & 0x000000ff;
216 static const char *netcp_node_name(struct device_node *node)
220 if (of_property_read_string(node, "label", &name) < 0)
227 /* Module management routines */
228 static int netcp_register_interface(struct netcp_intf *netcp)
232 ret = register_netdev(netcp->ndev);
234 netcp->netdev_registered = true;
238 static int netcp_module_probe(struct netcp_device *netcp_device,
239 struct netcp_module *module)
241 struct device *dev = netcp_device->device;
242 struct device_node *devices, *interface, *node = dev->of_node;
243 struct device_node *child;
244 struct netcp_inst_modpriv *inst_modpriv;
245 struct netcp_intf *netcp_intf;
246 struct netcp_module *tmp;
247 bool primary_module_registered = false;
250 /* Find this module in the sub-tree for this device */
251 devices = of_get_child_by_name(node, "netcp-devices");
253 dev_err(dev, "could not find netcp-devices node\n");
254 return NETCP_MOD_PROBE_SKIPPED;
257 for_each_available_child_of_node(devices, child) {
258 const char *name = netcp_node_name(child);
260 if (!strcasecmp(module->name, name))
264 of_node_put(devices);
265 /* If module not used for this device, skip it */
267 dev_warn(dev, "module(%s) not used for device\n", module->name);
268 return NETCP_MOD_PROBE_SKIPPED;
271 inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL);
277 inst_modpriv->netcp_device = netcp_device;
278 inst_modpriv->netcp_module = module;
279 list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head);
281 ret = module->probe(netcp_device, dev, child,
282 &inst_modpriv->module_priv);
285 dev_err(dev, "Probe of module(%s) failed with %d\n",
287 list_del(&inst_modpriv->inst_list);
288 devm_kfree(dev, inst_modpriv);
289 return NETCP_MOD_PROBE_FAILED;
292 /* Attach modules only if the primary module is probed */
293 for_each_netcp_module(tmp) {
295 primary_module_registered = true;
298 if (!primary_module_registered)
301 /* Attach module to interfaces */
302 list_for_each_entry(netcp_intf, &netcp_device->interface_head,
304 struct netcp_intf_modpriv *intf_modpriv;
306 intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv),
311 interface = of_parse_phandle(netcp_intf->node_interface,
315 devm_kfree(dev, intf_modpriv);
319 intf_modpriv->netcp_priv = netcp_intf;
320 intf_modpriv->netcp_module = module;
321 list_add_tail(&intf_modpriv->intf_list,
322 &netcp_intf->module_head);
324 ret = module->attach(inst_modpriv->module_priv,
325 netcp_intf->ndev, interface,
326 &intf_modpriv->module_priv);
327 of_node_put(interface);
329 dev_dbg(dev, "Attach of module %s declined with %d\n",
331 list_del(&intf_modpriv->intf_list);
332 devm_kfree(dev, intf_modpriv);
337 /* Now register the interface with netdev */
338 list_for_each_entry(netcp_intf,
339 &netcp_device->interface_head,
341 /* If interface not registered then register now */
342 if (!netcp_intf->netdev_registered) {
343 ret = netcp_register_interface(netcp_intf);
351 int netcp_register_module(struct netcp_module *module)
353 struct netcp_device *netcp_device;
354 struct netcp_module *tmp;
358 WARN(1, "error registering netcp module: no name\n");
362 if (!module->probe) {
363 WARN(1, "error registering netcp module: no probe\n");
367 mutex_lock(&netcp_modules_lock);
369 for_each_netcp_module(tmp) {
370 if (!strcasecmp(tmp->name, module->name)) {
371 mutex_unlock(&netcp_modules_lock);
375 list_add_tail(&module->module_list, &netcp_modules);
377 list_for_each_entry(netcp_device, &netcp_devices, device_list) {
378 ret = netcp_module_probe(netcp_device, module);
382 mutex_unlock(&netcp_modules_lock);
386 mutex_unlock(&netcp_modules_lock);
387 netcp_unregister_module(module);
390 EXPORT_SYMBOL_GPL(netcp_register_module);
392 static void netcp_release_module(struct netcp_device *netcp_device,
393 struct netcp_module *module)
395 struct netcp_inst_modpriv *inst_modpriv, *inst_tmp;
396 struct netcp_intf *netcp_intf, *netcp_tmp;
397 struct device *dev = netcp_device->device;
399 /* Release the module from each interface */
400 list_for_each_entry_safe(netcp_intf, netcp_tmp,
401 &netcp_device->interface_head,
403 struct netcp_intf_modpriv *intf_modpriv, *intf_tmp;
405 list_for_each_entry_safe(intf_modpriv, intf_tmp,
406 &netcp_intf->module_head,
408 if (intf_modpriv->netcp_module == module) {
409 module->release(intf_modpriv->module_priv);
410 list_del(&intf_modpriv->intf_list);
411 devm_kfree(dev, intf_modpriv);
417 /* Remove the module from each instance */
418 list_for_each_entry_safe(inst_modpriv, inst_tmp,
419 &netcp_device->modpriv_head, inst_list) {
420 if (inst_modpriv->netcp_module == module) {
421 module->remove(netcp_device,
422 inst_modpriv->module_priv);
423 list_del(&inst_modpriv->inst_list);
424 devm_kfree(dev, inst_modpriv);
430 void netcp_unregister_module(struct netcp_module *module)
432 struct netcp_device *netcp_device;
433 struct netcp_module *module_tmp;
435 mutex_lock(&netcp_modules_lock);
437 list_for_each_entry(netcp_device, &netcp_devices, device_list) {
438 netcp_release_module(netcp_device, module);
441 /* Remove the module from the module list */
442 for_each_netcp_module(module_tmp) {
443 if (module == module_tmp) {
444 list_del(&module->module_list);
449 mutex_unlock(&netcp_modules_lock);
451 EXPORT_SYMBOL_GPL(netcp_unregister_module);
453 void *netcp_module_get_intf_data(struct netcp_module *module,
454 struct netcp_intf *intf)
456 struct netcp_intf_modpriv *intf_modpriv;
458 list_for_each_entry(intf_modpriv, &intf->module_head, intf_list)
459 if (intf_modpriv->netcp_module == module)
460 return intf_modpriv->module_priv;
463 EXPORT_SYMBOL_GPL(netcp_module_get_intf_data);
465 /* Module TX and RX Hook management */
466 struct netcp_hook_list {
467 struct list_head list;
468 netcp_hook_rtn *hook_rtn;
473 int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
474 netcp_hook_rtn *hook_rtn, void *hook_data)
476 struct netcp_hook_list *entry;
477 struct netcp_hook_list *next;
480 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
484 entry->hook_rtn = hook_rtn;
485 entry->hook_data = hook_data;
486 entry->order = order;
488 spin_lock_irqsave(&netcp_priv->lock, flags);
489 list_for_each_entry(next, &netcp_priv->txhook_list_head, list) {
490 if (next->order > order)
493 __list_add(&entry->list, next->list.prev, &next->list);
494 spin_unlock_irqrestore(&netcp_priv->lock, flags);
498 EXPORT_SYMBOL_GPL(netcp_register_txhook);
500 int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,
501 netcp_hook_rtn *hook_rtn, void *hook_data)
503 struct netcp_hook_list *next, *n;
506 spin_lock_irqsave(&netcp_priv->lock, flags);
507 list_for_each_entry_safe(next, n, &netcp_priv->txhook_list_head, list) {
508 if ((next->order == order) &&
509 (next->hook_rtn == hook_rtn) &&
510 (next->hook_data == hook_data)) {
511 list_del(&next->list);
512 spin_unlock_irqrestore(&netcp_priv->lock, flags);
513 devm_kfree(netcp_priv->dev, next);
517 spin_unlock_irqrestore(&netcp_priv->lock, flags);
520 EXPORT_SYMBOL_GPL(netcp_unregister_txhook);
522 int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,
523 netcp_hook_rtn *hook_rtn, void *hook_data)
525 struct netcp_hook_list *entry;
526 struct netcp_hook_list *next;
529 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
533 entry->hook_rtn = hook_rtn;
534 entry->hook_data = hook_data;
535 entry->order = order;
537 spin_lock_irqsave(&netcp_priv->lock, flags);
538 list_for_each_entry(next, &netcp_priv->rxhook_list_head, list) {
539 if (next->order > order)
542 __list_add(&entry->list, next->list.prev, &next->list);
543 spin_unlock_irqrestore(&netcp_priv->lock, flags);
548 int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,
549 netcp_hook_rtn *hook_rtn, void *hook_data)
551 struct netcp_hook_list *next, *n;
554 spin_lock_irqsave(&netcp_priv->lock, flags);
555 list_for_each_entry_safe(next, n, &netcp_priv->rxhook_list_head, list) {
556 if ((next->order == order) &&
557 (next->hook_rtn == hook_rtn) &&
558 (next->hook_data == hook_data)) {
559 list_del(&next->list);
560 spin_unlock_irqrestore(&netcp_priv->lock, flags);
561 devm_kfree(netcp_priv->dev, next);
565 spin_unlock_irqrestore(&netcp_priv->lock, flags);
570 static void netcp_frag_free(bool is_frag, void *ptr)
578 static void netcp_free_rx_desc_chain(struct netcp_intf *netcp,
579 struct knav_dma_desc *desc)
581 struct knav_dma_desc *ndesc;
582 dma_addr_t dma_desc, dma_buf;
583 unsigned int buf_len, dma_sz = sizeof(*ndesc);
587 get_words(&dma_desc, 1, &desc->next_desc);
590 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
591 if (unlikely(!ndesc)) {
592 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
595 get_pkt_info(&dma_buf, &tmp, &dma_desc, ndesc);
596 /* warning!!!! We are retrieving the virtual ptr in the sw_data
597 * field as a 32bit value. Will not work on 64bit machines
599 buf_ptr = (void *)GET_SW_DATA0(ndesc);
600 buf_len = (int)GET_SW_DATA1(desc);
601 dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE);
602 __free_page(buf_ptr);
603 knav_pool_desc_put(netcp->rx_pool, desc);
605 /* warning!!!! We are retrieving the virtual ptr in the sw_data
606 * field as a 32bit value. Will not work on 64bit machines
608 buf_ptr = (void *)GET_SW_DATA0(desc);
609 buf_len = (int)GET_SW_DATA1(desc);
612 netcp_frag_free(buf_len <= PAGE_SIZE, buf_ptr);
613 knav_pool_desc_put(netcp->rx_pool, desc);
616 static void netcp_empty_rx_queue(struct netcp_intf *netcp)
618 struct knav_dma_desc *desc;
623 dma = knav_queue_pop(netcp->rx_queue, &dma_sz);
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",
631 netcp->ndev->stats.rx_errors++;
634 netcp_free_rx_desc_chain(netcp, desc);
635 netcp->ndev->stats.rx_dropped++;
639 static int netcp_process_one_rx_packet(struct netcp_intf *netcp)
641 unsigned int dma_sz, buf_len, org_buf_len;
642 struct knav_dma_desc *desc, *ndesc;
643 unsigned int pkt_sz = 0, accum_sz;
644 struct netcp_hook_list *rx_hook;
645 dma_addr_t dma_desc, dma_buff;
646 struct netcp_packet p_info;
650 dma_desc = knav_queue_pop(netcp->rx_queue, &dma_sz);
654 desc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
655 if (unlikely(!desc)) {
656 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
660 get_pkt_info(&dma_buff, &buf_len, &dma_desc, desc);
661 /* warning!!!! We are retrieving the virtual ptr in the sw_data
662 * field as a 32bit value. Will not work on 64bit machines
664 org_buf_ptr = (void *)GET_SW_DATA0(desc);
665 org_buf_len = (int)GET_SW_DATA1(desc);
667 if (unlikely(!org_buf_ptr)) {
668 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
672 pkt_sz &= KNAV_DMA_DESC_PKT_LEN_MASK;
674 dma_unmap_single(netcp->dev, dma_buff, buf_len, DMA_FROM_DEVICE);
676 /* Build a new sk_buff for the primary buffer */
677 skb = build_skb(org_buf_ptr, org_buf_len);
678 if (unlikely(!skb)) {
679 dev_err(netcp->ndev_dev, "build_skb() failed\n");
683 /* update data, tail and len */
684 skb_reserve(skb, NETCP_SOP_OFFSET);
685 __skb_put(skb, buf_len);
687 /* Fill in the page fragment list */
691 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
692 if (unlikely(!ndesc)) {
693 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
697 get_pkt_info(&dma_buff, &buf_len, &dma_desc, ndesc);
698 /* warning!!!! We are retrieving the virtual ptr in the sw_data
699 * field as a 32bit value. Will not work on 64bit machines
701 page = (struct page *)GET_SW_DATA0(desc);
703 if (likely(dma_buff && buf_len && page)) {
704 dma_unmap_page(netcp->dev, dma_buff, PAGE_SIZE,
707 dev_err(netcp->ndev_dev, "Bad Rx desc dma_buff(%pad), len(%d), page(%p)\n",
708 &dma_buff, buf_len, page);
712 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
713 offset_in_page(dma_buff), buf_len, PAGE_SIZE);
716 /* Free the descriptor */
717 knav_pool_desc_put(netcp->rx_pool, ndesc);
720 /* Free the primary descriptor */
721 knav_pool_desc_put(netcp->rx_pool, desc);
723 /* check for packet len and warn */
724 if (unlikely(pkt_sz != accum_sz))
725 dev_dbg(netcp->ndev_dev, "mismatch in packet size(%d) & sum of fragments(%d)\n",
728 /* Remove ethernet FCS from the packet */
729 __pskb_trim(skb, skb->len - ETH_FCS_LEN);
731 /* Call each of the RX hooks */
733 p_info.rxtstamp_complete = false;
734 list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) {
737 ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data,
740 dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n",
741 rx_hook->order, ret);
742 netcp->ndev->stats.rx_errors++;
748 netcp->ndev->stats.rx_packets++;
749 netcp->ndev->stats.rx_bytes += skb->len;
751 /* push skb up the stack */
752 skb->protocol = eth_type_trans(skb, netcp->ndev);
753 netif_receive_skb(skb);
757 netcp_free_rx_desc_chain(netcp, desc);
758 netcp->ndev->stats.rx_errors++;
762 static int netcp_process_rx_packets(struct netcp_intf *netcp,
767 for (i = 0; (i < budget) && !netcp_process_one_rx_packet(netcp); i++)
772 /* Release descriptors and attached buffers from Rx FDQ */
773 static void netcp_free_rx_buf(struct netcp_intf *netcp, int fdq)
775 struct knav_dma_desc *desc;
776 unsigned int buf_len, dma_sz;
780 /* Allocate descriptor */
781 while ((dma = knav_queue_pop(netcp->rx_fdq[fdq], &dma_sz))) {
782 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
783 if (unlikely(!desc)) {
784 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
788 get_org_pkt_info(&dma, &buf_len, desc);
789 /* warning!!!! We are retrieving the virtual ptr in the sw_data
790 * field as a 32bit value. Will not work on 64bit machines
792 buf_ptr = (void *)GET_SW_DATA0(desc);
794 if (unlikely(!dma)) {
795 dev_err(netcp->ndev_dev, "NULL orig_buff in desc\n");
796 knav_pool_desc_put(netcp->rx_pool, desc);
800 if (unlikely(!buf_ptr)) {
801 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
802 knav_pool_desc_put(netcp->rx_pool, desc);
807 dma_unmap_single(netcp->dev, dma, buf_len,
809 netcp_frag_free((buf_len <= PAGE_SIZE), buf_ptr);
811 dma_unmap_page(netcp->dev, dma, buf_len,
813 __free_page(buf_ptr);
816 knav_pool_desc_put(netcp->rx_pool, desc);
820 static void netcp_rxpool_free(struct netcp_intf *netcp)
824 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
825 !IS_ERR_OR_NULL(netcp->rx_fdq[i]); i++)
826 netcp_free_rx_buf(netcp, i);
828 if (knav_pool_count(netcp->rx_pool) != netcp->rx_pool_size)
829 dev_err(netcp->ndev_dev, "Lost Rx (%d) descriptors\n",
830 netcp->rx_pool_size - knav_pool_count(netcp->rx_pool));
832 knav_pool_destroy(netcp->rx_pool);
833 netcp->rx_pool = NULL;
836 static int netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq)
838 struct knav_dma_desc *hwdesc;
839 unsigned int buf_len, dma_sz;
840 u32 desc_info, pkt_info;
846 /* Allocate descriptor */
847 hwdesc = knav_pool_desc_get(netcp->rx_pool);
848 if (IS_ERR_OR_NULL(hwdesc)) {
849 dev_dbg(netcp->ndev_dev, "out of rx pool desc\n");
853 if (likely(fdq == 0)) {
854 unsigned int primary_buf_len;
855 /* Allocate a primary receive queue entry */
856 buf_len = NETCP_PACKET_SIZE + NETCP_SOP_OFFSET;
857 primary_buf_len = SKB_DATA_ALIGN(buf_len) +
858 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
860 bufptr = netdev_alloc_frag(primary_buf_len);
861 sw_data[1] = primary_buf_len;
863 if (unlikely(!bufptr)) {
864 dev_warn_ratelimited(netcp->ndev_dev,
865 "Primary RX buffer alloc failed\n");
868 dma = dma_map_single(netcp->dev, bufptr, buf_len,
870 if (unlikely(dma_mapping_error(netcp->dev, dma)))
873 /* warning!!!! We are saving the virtual ptr in the sw_data
874 * field as a 32bit value. Will not work on 64bit machines
876 sw_data[0] = (u32)bufptr;
878 /* Allocate a secondary receive queue entry */
879 page = alloc_page(GFP_ATOMIC | GFP_DMA | __GFP_COLD);
880 if (unlikely(!page)) {
881 dev_warn_ratelimited(netcp->ndev_dev, "Secondary page alloc failed\n");
885 dma = dma_map_page(netcp->dev, page, 0, buf_len, DMA_TO_DEVICE);
886 /* warning!!!! We are saving the virtual ptr in the sw_data
887 * field as a 32bit value. Will not work on 64bit machines
889 sw_data[0] = (u32)page;
893 desc_info = KNAV_DMA_DESC_PS_INFO_IN_DESC;
894 desc_info |= buf_len & KNAV_DMA_DESC_PKT_LEN_MASK;
895 pkt_info = KNAV_DMA_DESC_HAS_EPIB;
896 pkt_info |= KNAV_DMA_NUM_PS_WORDS << KNAV_DMA_DESC_PSLEN_SHIFT;
897 pkt_info |= (netcp->rx_queue_id & KNAV_DMA_DESC_RETQ_MASK) <<
898 KNAV_DMA_DESC_RETQ_SHIFT;
899 set_org_pkt_info(dma, buf_len, hwdesc);
900 SET_SW_DATA0(sw_data[0], hwdesc);
901 SET_SW_DATA1(sw_data[1], hwdesc);
902 set_desc_info(desc_info, pkt_info, hwdesc);
905 knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma,
907 knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0);
911 knav_pool_desc_put(netcp->rx_pool, hwdesc);
915 /* Refill Rx FDQ with descriptors & attached buffers */
916 static void netcp_rxpool_refill(struct netcp_intf *netcp)
918 u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0};
921 /* Calculate the FDQ deficit and refill */
922 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) {
923 fdq_deficit[i] = netcp->rx_queue_depths[i] -
924 knav_queue_get_count(netcp->rx_fdq[i]);
926 while (fdq_deficit[i]-- && !ret)
927 ret = netcp_allocate_rx_buf(netcp, i);
932 static int netcp_rx_poll(struct napi_struct *napi, int budget)
934 struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
936 unsigned int packets;
938 packets = netcp_process_rx_packets(netcp, budget);
940 netcp_rxpool_refill(netcp);
941 if (packets < budget) {
942 napi_complete(&netcp->rx_napi);
943 knav_queue_enable_notify(netcp->rx_queue);
949 static void netcp_rx_notify(void *arg)
951 struct netcp_intf *netcp = arg;
953 knav_queue_disable_notify(netcp->rx_queue);
954 napi_schedule(&netcp->rx_napi);
957 static void netcp_free_tx_desc_chain(struct netcp_intf *netcp,
958 struct knav_dma_desc *desc,
959 unsigned int desc_sz)
961 struct knav_dma_desc *ndesc = desc;
962 dma_addr_t dma_desc, dma_buf;
963 unsigned int buf_len;
966 get_pkt_info(&dma_buf, &buf_len, &dma_desc, ndesc);
968 if (dma_buf && buf_len)
969 dma_unmap_single(netcp->dev, dma_buf, buf_len,
972 dev_warn(netcp->ndev_dev, "bad Tx desc buf(%pad), len(%d)\n",
975 knav_pool_desc_put(netcp->tx_pool, ndesc);
978 ndesc = knav_pool_desc_unmap(netcp->tx_pool, dma_desc,
981 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
986 static int netcp_process_tx_compl_packets(struct netcp_intf *netcp,
989 struct knav_dma_desc *desc;
996 dma = knav_queue_pop(netcp->tx_compl_q, &dma_sz);
999 desc = knav_pool_desc_unmap(netcp->tx_pool, dma, dma_sz);
1000 if (unlikely(!desc)) {
1001 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
1002 netcp->ndev->stats.tx_errors++;
1006 /* warning!!!! We are retrieving the virtual ptr in the sw_data
1007 * field as a 32bit value. Will not work on 64bit machines
1009 skb = (struct sk_buff *)GET_SW_DATA0(desc);
1010 netcp_free_tx_desc_chain(netcp, desc, dma_sz);
1012 dev_err(netcp->ndev_dev, "No skb in Tx desc\n");
1013 netcp->ndev->stats.tx_errors++;
1017 if (netif_subqueue_stopped(netcp->ndev, skb) &&
1018 netif_running(netcp->ndev) &&
1019 (knav_pool_count(netcp->tx_pool) >
1020 netcp->tx_resume_threshold)) {
1021 u16 subqueue = skb_get_queue_mapping(skb);
1023 netif_wake_subqueue(netcp->ndev, subqueue);
1026 netcp->ndev->stats.tx_packets++;
1027 netcp->ndev->stats.tx_bytes += skb->len;
1034 static int netcp_tx_poll(struct napi_struct *napi, int budget)
1037 struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
1040 packets = netcp_process_tx_compl_packets(netcp, budget);
1041 if (packets < budget) {
1042 napi_complete(&netcp->tx_napi);
1043 knav_queue_enable_notify(netcp->tx_compl_q);
1049 static void netcp_tx_notify(void *arg)
1051 struct netcp_intf *netcp = arg;
1053 knav_queue_disable_notify(netcp->tx_compl_q);
1054 napi_schedule(&netcp->tx_napi);
1057 static struct knav_dma_desc*
1058 netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp)
1060 struct knav_dma_desc *desc, *ndesc, *pdesc;
1061 unsigned int pkt_len = skb_headlen(skb);
1062 struct device *dev = netcp->dev;
1063 dma_addr_t dma_addr;
1064 unsigned int dma_sz;
1067 /* Map the linear buffer */
1068 dma_addr = dma_map_single(dev, skb->data, pkt_len, DMA_TO_DEVICE);
1069 if (unlikely(dma_mapping_error(dev, dma_addr))) {
1070 dev_err(netcp->ndev_dev, "Failed to map skb buffer\n");
1074 desc = knav_pool_desc_get(netcp->tx_pool);
1075 if (IS_ERR_OR_NULL(desc)) {
1076 dev_err(netcp->ndev_dev, "out of TX desc\n");
1077 dma_unmap_single(dev, dma_addr, pkt_len, DMA_TO_DEVICE);
1081 set_pkt_info(dma_addr, pkt_len, 0, desc);
1082 if (skb_is_nonlinear(skb)) {
1083 prefetchw(skb_shinfo(skb));
1085 desc->next_desc = 0;
1091 /* Handle the case where skb is fragmented in pages */
1092 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1093 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1094 struct page *page = skb_frag_page(frag);
1095 u32 page_offset = frag->page_offset;
1096 u32 buf_len = skb_frag_size(frag);
1097 dma_addr_t desc_dma;
1101 dma_addr = dma_map_page(dev, page, page_offset, buf_len,
1103 if (unlikely(!dma_addr)) {
1104 dev_err(netcp->ndev_dev, "Failed to map skb page\n");
1108 ndesc = knav_pool_desc_get(netcp->tx_pool);
1109 if (IS_ERR_OR_NULL(ndesc)) {
1110 dev_err(netcp->ndev_dev, "out of TX desc for frags\n");
1111 dma_unmap_page(dev, dma_addr, buf_len, DMA_TO_DEVICE);
1115 desc_dma = knav_pool_desc_virt_to_dma(netcp->tx_pool, ndesc);
1117 (netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<
1118 KNAV_DMA_DESC_RETQ_SHIFT;
1119 set_pkt_info(dma_addr, buf_len, 0, ndesc);
1120 desc_dma_32 = (u32)desc_dma;
1121 set_words(&desc_dma_32, 1, &pdesc->next_desc);
1124 knav_pool_desc_map(netcp->tx_pool, pdesc,
1125 sizeof(*pdesc), &desc_dma, &dma_sz);
1129 knav_pool_desc_map(netcp->tx_pool, pdesc, sizeof(*pdesc),
1130 &dma_addr, &dma_sz);
1132 /* frag list based linkage is not supported for now. */
1133 if (skb_shinfo(skb)->frag_list) {
1134 dev_err_ratelimited(netcp->ndev_dev, "NETIF_F_FRAGLIST not supported\n");
1139 WARN_ON(pkt_len != skb->len);
1141 pkt_len &= KNAV_DMA_DESC_PKT_LEN_MASK;
1142 set_words(&pkt_len, 1, &desc->desc_info);
1146 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
1150 static int netcp_tx_submit_skb(struct netcp_intf *netcp,
1151 struct sk_buff *skb,
1152 struct knav_dma_desc *desc)
1154 struct netcp_tx_pipe *tx_pipe = NULL;
1155 struct netcp_hook_list *tx_hook;
1156 struct netcp_packet p_info;
1157 unsigned int dma_sz;
1162 p_info.netcp = netcp;
1164 p_info.tx_pipe = NULL;
1165 p_info.psdata_len = 0;
1166 p_info.ts_context = NULL;
1167 p_info.txtstamp_complete = NULL;
1168 p_info.epib = desc->epib;
1169 p_info.psdata = (u32 __force *)desc->psdata;
1170 memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(__le32));
1172 /* Find out where to inject the packet for transmission */
1173 list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) {
1174 ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data,
1176 if (unlikely(ret != 0)) {
1177 dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n",
1178 tx_hook->order, ret);
1179 ret = (ret < 0) ? ret : NETDEV_TX_OK;
1184 /* Make sure some TX hook claimed the packet */
1185 tx_pipe = p_info.tx_pipe;
1187 dev_err(netcp->ndev_dev, "No TX hook claimed the packet!\n");
1192 /* update descriptor */
1193 if (p_info.psdata_len) {
1194 /* psdata points to both native-endian and device-endian data */
1195 __le32 *psdata = (void __force *)p_info.psdata;
1197 memmove(p_info.psdata, p_info.psdata + p_info.psdata_len,
1199 set_words(p_info.psdata, p_info.psdata_len, psdata);
1200 tmp |= (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) <<
1201 KNAV_DMA_DESC_PSLEN_SHIFT;
1204 tmp |= KNAV_DMA_DESC_HAS_EPIB |
1205 ((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<
1206 KNAV_DMA_DESC_RETQ_SHIFT);
1208 if (!(tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO)) {
1209 tmp |= ((tx_pipe->switch_to_port & KNAV_DMA_DESC_PSFLAG_MASK) <<
1210 KNAV_DMA_DESC_PSFLAG_SHIFT);
1213 set_words(&tmp, 1, &desc->packet_info);
1214 /* warning!!!! We are saving the virtual ptr in the sw_data
1215 * field as a 32bit value. Will not work on 64bit machines
1217 SET_SW_DATA0((u32)skb, desc);
1219 if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) {
1220 tmp = tx_pipe->switch_to_port;
1221 set_words(&tmp, 1, &desc->tag_info);
1224 /* submit packet descriptor */
1225 ret = knav_pool_desc_map(netcp->tx_pool, desc, sizeof(*desc), &dma,
1227 if (unlikely(ret)) {
1228 dev_err(netcp->ndev_dev, "%s() failed to map desc\n", __func__);
1232 skb_tx_timestamp(skb);
1233 knav_queue_push(tx_pipe->dma_queue, dma, dma_sz, 0);
1239 /* Submit the packet */
1240 static int netcp_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1242 struct netcp_intf *netcp = netdev_priv(ndev);
1243 int subqueue = skb_get_queue_mapping(skb);
1244 struct knav_dma_desc *desc;
1245 int desc_count, ret = 0;
1247 if (unlikely(skb->len <= 0)) {
1249 return NETDEV_TX_OK;
1252 if (unlikely(skb->len < NETCP_MIN_PACKET_SIZE)) {
1253 ret = skb_padto(skb, NETCP_MIN_PACKET_SIZE);
1255 /* If we get here, the skb has already been dropped */
1256 dev_warn(netcp->ndev_dev, "padding failed (%d), packet dropped\n",
1258 ndev->stats.tx_dropped++;
1261 skb->len = NETCP_MIN_PACKET_SIZE;
1264 desc = netcp_tx_map_skb(skb, netcp);
1265 if (unlikely(!desc)) {
1266 netif_stop_subqueue(ndev, subqueue);
1271 ret = netcp_tx_submit_skb(netcp, skb, desc);
1275 ndev->trans_start = jiffies;
1277 /* Check Tx pool count & stop subqueue if needed */
1278 desc_count = knav_pool_count(netcp->tx_pool);
1279 if (desc_count < netcp->tx_pause_threshold) {
1280 dev_dbg(netcp->ndev_dev, "pausing tx, count(%d)\n", desc_count);
1281 netif_stop_subqueue(ndev, subqueue);
1283 return NETDEV_TX_OK;
1286 ndev->stats.tx_dropped++;
1288 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
1293 int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe)
1295 if (tx_pipe->dma_channel) {
1296 knav_dma_close_channel(tx_pipe->dma_channel);
1297 tx_pipe->dma_channel = NULL;
1301 EXPORT_SYMBOL_GPL(netcp_txpipe_close);
1303 int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe)
1305 struct device *dev = tx_pipe->netcp_device->device;
1306 struct knav_dma_cfg config;
1310 memset(&config, 0, sizeof(config));
1311 config.direction = DMA_MEM_TO_DEV;
1312 config.u.tx.filt_einfo = false;
1313 config.u.tx.filt_pswords = false;
1314 config.u.tx.priority = DMA_PRIO_MED_L;
1316 tx_pipe->dma_channel = knav_dma_open_channel(dev,
1317 tx_pipe->dma_chan_name, &config);
1318 if (IS_ERR_OR_NULL(tx_pipe->dma_channel)) {
1319 dev_err(dev, "failed opening tx chan(%s)\n",
1320 tx_pipe->dma_chan_name);
1324 snprintf(name, sizeof(name), "tx-pipe-%s", dev_name(dev));
1325 tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id,
1327 if (IS_ERR(tx_pipe->dma_queue)) {
1328 dev_err(dev, "Could not open DMA queue for channel \"%s\": %d\n",
1330 ret = PTR_ERR(tx_pipe->dma_queue);
1334 dev_dbg(dev, "opened tx pipe %s\n", name);
1338 if (!IS_ERR_OR_NULL(tx_pipe->dma_channel))
1339 knav_dma_close_channel(tx_pipe->dma_channel);
1340 tx_pipe->dma_channel = NULL;
1343 EXPORT_SYMBOL_GPL(netcp_txpipe_open);
1345 int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,
1346 struct netcp_device *netcp_device,
1347 const char *dma_chan_name, unsigned int dma_queue_id)
1349 memset(tx_pipe, 0, sizeof(*tx_pipe));
1350 tx_pipe->netcp_device = netcp_device;
1351 tx_pipe->dma_chan_name = dma_chan_name;
1352 tx_pipe->dma_queue_id = dma_queue_id;
1355 EXPORT_SYMBOL_GPL(netcp_txpipe_init);
1357 static struct netcp_addr *netcp_addr_find(struct netcp_intf *netcp,
1359 enum netcp_addr_type type)
1361 struct netcp_addr *naddr;
1363 list_for_each_entry(naddr, &netcp->addr_list, node) {
1364 if (naddr->type != type)
1366 if (addr && memcmp(addr, naddr->addr, ETH_ALEN))
1374 static struct netcp_addr *netcp_addr_add(struct netcp_intf *netcp,
1376 enum netcp_addr_type type)
1378 struct netcp_addr *naddr;
1380 naddr = devm_kmalloc(netcp->dev, sizeof(*naddr), GFP_ATOMIC);
1386 naddr->netcp = netcp;
1388 ether_addr_copy(naddr->addr, addr);
1390 eth_zero_addr(naddr->addr);
1391 list_add_tail(&naddr->node, &netcp->addr_list);
1396 static void netcp_addr_del(struct netcp_intf *netcp, struct netcp_addr *naddr)
1398 list_del(&naddr->node);
1399 devm_kfree(netcp->dev, naddr);
1402 static void netcp_addr_clear_mark(struct netcp_intf *netcp)
1404 struct netcp_addr *naddr;
1406 list_for_each_entry(naddr, &netcp->addr_list, node)
1410 static void netcp_addr_add_mark(struct netcp_intf *netcp, const u8 *addr,
1411 enum netcp_addr_type type)
1413 struct netcp_addr *naddr;
1415 naddr = netcp_addr_find(netcp, addr, type);
1417 naddr->flags |= ADDR_VALID;
1421 naddr = netcp_addr_add(netcp, addr, type);
1422 if (!WARN_ON(!naddr))
1423 naddr->flags |= ADDR_NEW;
1426 static void netcp_addr_sweep_del(struct netcp_intf *netcp)
1428 struct netcp_addr *naddr, *tmp;
1429 struct netcp_intf_modpriv *priv;
1430 struct netcp_module *module;
1433 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
1434 if (naddr->flags & (ADDR_VALID | ADDR_NEW))
1436 dev_dbg(netcp->ndev_dev, "deleting address %pM, type %x\n",
1437 naddr->addr, naddr->type);
1438 for_each_module(netcp, priv) {
1439 module = priv->netcp_module;
1440 if (!module->del_addr)
1442 error = module->del_addr(priv->module_priv,
1446 netcp_addr_del(netcp, naddr);
1450 static void netcp_addr_sweep_add(struct netcp_intf *netcp)
1452 struct netcp_addr *naddr, *tmp;
1453 struct netcp_intf_modpriv *priv;
1454 struct netcp_module *module;
1457 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
1458 if (!(naddr->flags & ADDR_NEW))
1460 dev_dbg(netcp->ndev_dev, "adding address %pM, type %x\n",
1461 naddr->addr, naddr->type);
1463 for_each_module(netcp, priv) {
1464 module = priv->netcp_module;
1465 if (!module->add_addr)
1467 error = module->add_addr(priv->module_priv, naddr);
1473 static void netcp_set_rx_mode(struct net_device *ndev)
1475 struct netcp_intf *netcp = netdev_priv(ndev);
1476 struct netdev_hw_addr *ndev_addr;
1479 promisc = (ndev->flags & IFF_PROMISC ||
1480 ndev->flags & IFF_ALLMULTI ||
1481 netdev_mc_count(ndev) > NETCP_MAX_MCAST_ADDR);
1483 spin_lock(&netcp->lock);
1484 /* first clear all marks */
1485 netcp_addr_clear_mark(netcp);
1487 /* next add new entries, mark existing ones */
1488 netcp_addr_add_mark(netcp, ndev->broadcast, ADDR_BCAST);
1489 for_each_dev_addr(ndev, ndev_addr)
1490 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_DEV);
1491 netdev_for_each_uc_addr(ndev_addr, ndev)
1492 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_UCAST);
1493 netdev_for_each_mc_addr(ndev_addr, ndev)
1494 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_MCAST);
1497 netcp_addr_add_mark(netcp, NULL, ADDR_ANY);
1499 /* finally sweep and callout into modules */
1500 netcp_addr_sweep_del(netcp);
1501 netcp_addr_sweep_add(netcp);
1502 spin_unlock(&netcp->lock);
1505 static void netcp_free_navigator_resources(struct netcp_intf *netcp)
1509 if (netcp->rx_channel) {
1510 knav_dma_close_channel(netcp->rx_channel);
1511 netcp->rx_channel = NULL;
1514 if (!IS_ERR_OR_NULL(netcp->rx_pool))
1515 netcp_rxpool_free(netcp);
1517 if (!IS_ERR_OR_NULL(netcp->rx_queue)) {
1518 knav_queue_close(netcp->rx_queue);
1519 netcp->rx_queue = NULL;
1522 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
1523 !IS_ERR_OR_NULL(netcp->rx_fdq[i]) ; ++i) {
1524 knav_queue_close(netcp->rx_fdq[i]);
1525 netcp->rx_fdq[i] = NULL;
1528 if (!IS_ERR_OR_NULL(netcp->tx_compl_q)) {
1529 knav_queue_close(netcp->tx_compl_q);
1530 netcp->tx_compl_q = NULL;
1533 if (!IS_ERR_OR_NULL(netcp->tx_pool)) {
1534 knav_pool_destroy(netcp->tx_pool);
1535 netcp->tx_pool = NULL;
1539 static int netcp_setup_navigator_resources(struct net_device *ndev)
1541 struct netcp_intf *netcp = netdev_priv(ndev);
1542 struct knav_queue_notify_config notify_cfg;
1543 struct knav_dma_cfg config;
1549 /* Create Rx/Tx descriptor pools */
1550 snprintf(name, sizeof(name), "rx-pool-%s", ndev->name);
1551 netcp->rx_pool = knav_pool_create(name, netcp->rx_pool_size,
1552 netcp->rx_pool_region_id);
1553 if (IS_ERR_OR_NULL(netcp->rx_pool)) {
1554 dev_err(netcp->ndev_dev, "Couldn't create rx pool\n");
1555 ret = PTR_ERR(netcp->rx_pool);
1559 snprintf(name, sizeof(name), "tx-pool-%s", ndev->name);
1560 netcp->tx_pool = knav_pool_create(name, netcp->tx_pool_size,
1561 netcp->tx_pool_region_id);
1562 if (IS_ERR_OR_NULL(netcp->tx_pool)) {
1563 dev_err(netcp->ndev_dev, "Couldn't create tx pool\n");
1564 ret = PTR_ERR(netcp->tx_pool);
1568 /* open Tx completion queue */
1569 snprintf(name, sizeof(name), "tx-compl-%s", ndev->name);
1570 netcp->tx_compl_q = knav_queue_open(name, netcp->tx_compl_qid, 0);
1571 if (IS_ERR_OR_NULL(netcp->tx_compl_q)) {
1572 ret = PTR_ERR(netcp->tx_compl_q);
1575 netcp->tx_compl_qid = knav_queue_get_id(netcp->tx_compl_q);
1577 /* Set notification for Tx completion */
1578 notify_cfg.fn = netcp_tx_notify;
1579 notify_cfg.fn_arg = netcp;
1580 ret = knav_queue_device_control(netcp->tx_compl_q,
1581 KNAV_QUEUE_SET_NOTIFIER,
1582 (unsigned long)¬ify_cfg);
1586 knav_queue_disable_notify(netcp->tx_compl_q);
1588 /* open Rx completion queue */
1589 snprintf(name, sizeof(name), "rx-compl-%s", ndev->name);
1590 netcp->rx_queue = knav_queue_open(name, netcp->rx_queue_id, 0);
1591 if (IS_ERR_OR_NULL(netcp->rx_queue)) {
1592 ret = PTR_ERR(netcp->rx_queue);
1595 netcp->rx_queue_id = knav_queue_get_id(netcp->rx_queue);
1597 /* Set notification for Rx completion */
1598 notify_cfg.fn = netcp_rx_notify;
1599 notify_cfg.fn_arg = netcp;
1600 ret = knav_queue_device_control(netcp->rx_queue,
1601 KNAV_QUEUE_SET_NOTIFIER,
1602 (unsigned long)¬ify_cfg);
1606 knav_queue_disable_notify(netcp->rx_queue);
1609 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_queue_depths[i];
1611 snprintf(name, sizeof(name), "rx-fdq-%s-%d", ndev->name, i);
1612 netcp->rx_fdq[i] = knav_queue_open(name, KNAV_QUEUE_GP, 0);
1613 if (IS_ERR_OR_NULL(netcp->rx_fdq[i])) {
1614 ret = PTR_ERR(netcp->rx_fdq[i]);
1619 memset(&config, 0, sizeof(config));
1620 config.direction = DMA_DEV_TO_MEM;
1621 config.u.rx.einfo_present = true;
1622 config.u.rx.psinfo_present = true;
1623 config.u.rx.err_mode = DMA_DROP;
1624 config.u.rx.desc_type = DMA_DESC_HOST;
1625 config.u.rx.psinfo_at_sop = false;
1626 config.u.rx.sop_offset = NETCP_SOP_OFFSET;
1627 config.u.rx.dst_q = netcp->rx_queue_id;
1628 config.u.rx.thresh = DMA_THRESH_NONE;
1630 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN; ++i) {
1631 if (netcp->rx_fdq[i])
1632 last_fdq = knav_queue_get_id(netcp->rx_fdq[i]);
1633 config.u.rx.fdq[i] = last_fdq;
1636 netcp->rx_channel = knav_dma_open_channel(netcp->netcp_device->device,
1637 netcp->dma_chan_name, &config);
1638 if (IS_ERR_OR_NULL(netcp->rx_channel)) {
1639 dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n",
1640 netcp->dma_chan_name);
1644 dev_dbg(netcp->ndev_dev, "opened RX channel: %p\n", netcp->rx_channel);
1648 netcp_free_navigator_resources(netcp);
1652 /* Open the device */
1653 static int netcp_ndo_open(struct net_device *ndev)
1655 struct netcp_intf *netcp = netdev_priv(ndev);
1656 struct netcp_intf_modpriv *intf_modpriv;
1657 struct netcp_module *module;
1660 netif_carrier_off(ndev);
1661 ret = netcp_setup_navigator_resources(ndev);
1663 dev_err(netcp->ndev_dev, "Failed to setup navigator resources\n");
1667 for_each_module(netcp, intf_modpriv) {
1668 module = intf_modpriv->netcp_module;
1670 ret = module->open(intf_modpriv->module_priv, ndev);
1672 dev_err(netcp->ndev_dev, "module open failed\n");
1678 napi_enable(&netcp->rx_napi);
1679 napi_enable(&netcp->tx_napi);
1680 knav_queue_enable_notify(netcp->tx_compl_q);
1681 knav_queue_enable_notify(netcp->rx_queue);
1682 netcp_rxpool_refill(netcp);
1683 netif_tx_wake_all_queues(ndev);
1684 dev_dbg(netcp->ndev_dev, "netcp device %s opened\n", ndev->name);
1688 for_each_module(netcp, intf_modpriv) {
1689 module = intf_modpriv->netcp_module;
1691 module->close(intf_modpriv->module_priv, ndev);
1695 netcp_free_navigator_resources(netcp);
1699 /* Close the device */
1700 static int netcp_ndo_stop(struct net_device *ndev)
1702 struct netcp_intf *netcp = netdev_priv(ndev);
1703 struct netcp_intf_modpriv *intf_modpriv;
1704 struct netcp_module *module;
1707 netif_tx_stop_all_queues(ndev);
1708 netif_carrier_off(ndev);
1709 netcp_addr_clear_mark(netcp);
1710 netcp_addr_sweep_del(netcp);
1711 knav_queue_disable_notify(netcp->rx_queue);
1712 knav_queue_disable_notify(netcp->tx_compl_q);
1713 napi_disable(&netcp->rx_napi);
1714 napi_disable(&netcp->tx_napi);
1716 for_each_module(netcp, intf_modpriv) {
1717 module = intf_modpriv->netcp_module;
1718 if (module->close) {
1719 err = module->close(intf_modpriv->module_priv, ndev);
1721 dev_err(netcp->ndev_dev, "Close failed\n");
1725 /* Recycle Rx descriptors from completion queue */
1726 netcp_empty_rx_queue(netcp);
1728 /* Recycle Tx descriptors from completion queue */
1729 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
1731 if (knav_pool_count(netcp->tx_pool) != netcp->tx_pool_size)
1732 dev_err(netcp->ndev_dev, "Lost (%d) Tx descs\n",
1733 netcp->tx_pool_size - knav_pool_count(netcp->tx_pool));
1735 netcp_free_navigator_resources(netcp);
1736 dev_dbg(netcp->ndev_dev, "netcp device %s stopped\n", ndev->name);
1740 static int netcp_ndo_ioctl(struct net_device *ndev,
1741 struct ifreq *req, int cmd)
1743 struct netcp_intf *netcp = netdev_priv(ndev);
1744 struct netcp_intf_modpriv *intf_modpriv;
1745 struct netcp_module *module;
1746 int ret = -1, err = -EOPNOTSUPP;
1748 if (!netif_running(ndev))
1751 for_each_module(netcp, intf_modpriv) {
1752 module = intf_modpriv->netcp_module;
1756 err = module->ioctl(intf_modpriv->module_priv, req, cmd);
1757 if ((err < 0) && (err != -EOPNOTSUPP)) {
1766 return (ret == 0) ? 0 : err;
1769 static int netcp_ndo_change_mtu(struct net_device *ndev, int new_mtu)
1771 struct netcp_intf *netcp = netdev_priv(ndev);
1773 /* MTU < 68 is an error for IPv4 traffic */
1774 if ((new_mtu < 68) ||
1775 (new_mtu > (NETCP_MAX_FRAME_SIZE - ETH_HLEN - ETH_FCS_LEN))) {
1776 dev_err(netcp->ndev_dev, "Invalid mtu size = %d\n", new_mtu);
1780 ndev->mtu = new_mtu;
1784 static void netcp_ndo_tx_timeout(struct net_device *ndev)
1786 struct netcp_intf *netcp = netdev_priv(ndev);
1787 unsigned int descs = knav_pool_count(netcp->tx_pool);
1789 dev_err(netcp->ndev_dev, "transmit timed out tx descs(%d)\n", descs);
1790 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
1791 ndev->trans_start = jiffies;
1792 netif_tx_wake_all_queues(ndev);
1795 static int netcp_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid)
1797 struct netcp_intf *netcp = netdev_priv(ndev);
1798 struct netcp_intf_modpriv *intf_modpriv;
1799 struct netcp_module *module;
1800 unsigned long flags;
1803 dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid);
1805 spin_lock_irqsave(&netcp->lock, flags);
1806 for_each_module(netcp, intf_modpriv) {
1807 module = intf_modpriv->netcp_module;
1808 if ((module->add_vid) && (vid != 0)) {
1809 err = module->add_vid(intf_modpriv->module_priv, vid);
1811 dev_err(netcp->ndev_dev, "Could not add vlan id = %d\n",
1817 spin_unlock_irqrestore(&netcp->lock, flags);
1822 static int netcp_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid)
1824 struct netcp_intf *netcp = netdev_priv(ndev);
1825 struct netcp_intf_modpriv *intf_modpriv;
1826 struct netcp_module *module;
1827 unsigned long flags;
1830 dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid);
1832 spin_lock_irqsave(&netcp->lock, flags);
1833 for_each_module(netcp, intf_modpriv) {
1834 module = intf_modpriv->netcp_module;
1835 if (module->del_vid) {
1836 err = module->del_vid(intf_modpriv->module_priv, vid);
1838 dev_err(netcp->ndev_dev, "Could not delete vlan id = %d\n",
1844 spin_unlock_irqrestore(&netcp->lock, flags);
1848 static u16 netcp_select_queue(struct net_device *dev, struct sk_buff *skb,
1850 select_queue_fallback_t fallback)
1855 static int netcp_setup_tc(struct net_device *dev, u32 handle, __be16 proto,
1856 struct tc_to_netdev *tc)
1860 /* setup tc must be called under rtnl lock */
1863 if (tc->type != TC_SETUP_MQPRIO)
1866 /* Sanity-check the number of traffic classes requested */
1867 if ((dev->real_num_tx_queues <= 1) ||
1868 (dev->real_num_tx_queues < tc->tc))
1871 /* Configure traffic class to queue mappings */
1873 netdev_set_num_tc(dev, tc->tc);
1874 for (i = 0; i < tc->tc; i++)
1875 netdev_set_tc_queue(dev, i, 1, i);
1877 netdev_reset_tc(dev);
1883 static const struct net_device_ops netcp_netdev_ops = {
1884 .ndo_open = netcp_ndo_open,
1885 .ndo_stop = netcp_ndo_stop,
1886 .ndo_start_xmit = netcp_ndo_start_xmit,
1887 .ndo_set_rx_mode = netcp_set_rx_mode,
1888 .ndo_do_ioctl = netcp_ndo_ioctl,
1889 .ndo_change_mtu = netcp_ndo_change_mtu,
1890 .ndo_set_mac_address = eth_mac_addr,
1891 .ndo_validate_addr = eth_validate_addr,
1892 .ndo_vlan_rx_add_vid = netcp_rx_add_vid,
1893 .ndo_vlan_rx_kill_vid = netcp_rx_kill_vid,
1894 .ndo_tx_timeout = netcp_ndo_tx_timeout,
1895 .ndo_select_queue = netcp_select_queue,
1896 .ndo_setup_tc = netcp_setup_tc,
1899 static int netcp_create_interface(struct netcp_device *netcp_device,
1900 struct device_node *node_interface)
1902 struct device *dev = netcp_device->device;
1903 struct device_node *node = dev->of_node;
1904 struct netcp_intf *netcp;
1905 struct net_device *ndev;
1906 resource_size_t size;
1907 struct resource res;
1908 void __iomem *efuse = NULL;
1910 const void *mac_addr;
1911 u8 efuse_mac_addr[6];
1915 ndev = alloc_etherdev_mqs(sizeof(*netcp), 1, 1);
1917 dev_err(dev, "Error allocating netdev\n");
1921 ndev->features |= NETIF_F_SG;
1922 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1923 ndev->hw_features = ndev->features;
1924 ndev->vlan_features |= NETIF_F_SG;
1926 netcp = netdev_priv(ndev);
1927 spin_lock_init(&netcp->lock);
1928 INIT_LIST_HEAD(&netcp->module_head);
1929 INIT_LIST_HEAD(&netcp->txhook_list_head);
1930 INIT_LIST_HEAD(&netcp->rxhook_list_head);
1931 INIT_LIST_HEAD(&netcp->addr_list);
1932 netcp->netcp_device = netcp_device;
1933 netcp->dev = netcp_device->device;
1935 netcp->ndev_dev = &ndev->dev;
1936 netcp->msg_enable = netif_msg_init(netcp_debug_level, NETCP_DEBUG);
1937 netcp->tx_pause_threshold = MAX_SKB_FRAGS;
1938 netcp->tx_resume_threshold = netcp->tx_pause_threshold;
1939 netcp->node_interface = node_interface;
1941 ret = of_property_read_u32(node_interface, "efuse-mac", &efuse_mac);
1943 if (of_address_to_resource(node, NETCP_EFUSE_REG_INDEX, &res)) {
1944 dev_err(dev, "could not find efuse-mac reg resource\n");
1948 size = resource_size(&res);
1950 if (!devm_request_mem_region(dev, res.start, size,
1952 dev_err(dev, "could not reserve resource\n");
1957 efuse = devm_ioremap_nocache(dev, res.start, size);
1959 dev_err(dev, "could not map resource\n");
1960 devm_release_mem_region(dev, res.start, size);
1965 emac_arch_get_mac_addr(efuse_mac_addr, efuse, efuse_mac);
1966 if (is_valid_ether_addr(efuse_mac_addr))
1967 ether_addr_copy(ndev->dev_addr, efuse_mac_addr);
1969 random_ether_addr(ndev->dev_addr);
1971 devm_iounmap(dev, efuse);
1972 devm_release_mem_region(dev, res.start, size);
1974 mac_addr = of_get_mac_address(node_interface);
1976 ether_addr_copy(ndev->dev_addr, mac_addr);
1978 random_ether_addr(ndev->dev_addr);
1981 ret = of_property_read_string(node_interface, "rx-channel",
1982 &netcp->dma_chan_name);
1984 dev_err(dev, "missing \"rx-channel\" parameter\n");
1989 ret = of_property_read_u32(node_interface, "rx-queue",
1990 &netcp->rx_queue_id);
1992 dev_warn(dev, "missing \"rx-queue\" parameter\n");
1993 netcp->rx_queue_id = KNAV_QUEUE_QPEND;
1996 ret = of_property_read_u32_array(node_interface, "rx-queue-depth",
1997 netcp->rx_queue_depths,
1998 KNAV_DMA_FDQ_PER_CHAN);
2000 dev_err(dev, "missing \"rx-queue-depth\" parameter\n");
2001 netcp->rx_queue_depths[0] = 128;
2004 ret = of_property_read_u32_array(node_interface, "rx-pool", temp, 2);
2006 dev_err(dev, "missing \"rx-pool\" parameter\n");
2010 netcp->rx_pool_size = temp[0];
2011 netcp->rx_pool_region_id = temp[1];
2013 ret = of_property_read_u32_array(node_interface, "tx-pool", temp, 2);
2015 dev_err(dev, "missing \"tx-pool\" parameter\n");
2019 netcp->tx_pool_size = temp[0];
2020 netcp->tx_pool_region_id = temp[1];
2022 if (netcp->tx_pool_size < MAX_SKB_FRAGS) {
2023 dev_err(dev, "tx-pool size too small, must be atleast(%ld)\n",
2029 ret = of_property_read_u32(node_interface, "tx-completion-queue",
2030 &netcp->tx_compl_qid);
2032 dev_warn(dev, "missing \"tx-completion-queue\" parameter\n");
2033 netcp->tx_compl_qid = KNAV_QUEUE_QPEND;
2037 netif_napi_add(ndev, &netcp->rx_napi, netcp_rx_poll, NETCP_NAPI_WEIGHT);
2038 netif_tx_napi_add(ndev, &netcp->tx_napi, netcp_tx_poll, NETCP_NAPI_WEIGHT);
2040 /* Register the network device */
2042 ndev->watchdog_timeo = NETCP_TX_TIMEOUT;
2043 ndev->netdev_ops = &netcp_netdev_ops;
2044 SET_NETDEV_DEV(ndev, dev);
2046 list_add_tail(&netcp->interface_list, &netcp_device->interface_head);
2054 static void netcp_delete_interface(struct netcp_device *netcp_device,
2055 struct net_device *ndev)
2057 struct netcp_intf_modpriv *intf_modpriv, *tmp;
2058 struct netcp_intf *netcp = netdev_priv(ndev);
2059 struct netcp_module *module;
2061 dev_dbg(netcp_device->device, "Removing interface \"%s\"\n",
2064 /* Notify each of the modules that the interface is going away */
2065 list_for_each_entry_safe(intf_modpriv, tmp, &netcp->module_head,
2067 module = intf_modpriv->netcp_module;
2068 dev_dbg(netcp_device->device, "Releasing module \"%s\"\n",
2070 if (module->release)
2071 module->release(intf_modpriv->module_priv);
2072 list_del(&intf_modpriv->intf_list);
2073 kfree(intf_modpriv);
2075 WARN(!list_empty(&netcp->module_head), "%s interface module list is not empty!\n",
2078 list_del(&netcp->interface_list);
2080 of_node_put(netcp->node_interface);
2081 unregister_netdev(ndev);
2082 netif_napi_del(&netcp->rx_napi);
2086 static int netcp_probe(struct platform_device *pdev)
2088 struct device_node *node = pdev->dev.of_node;
2089 struct netcp_intf *netcp_intf, *netcp_tmp;
2090 struct device_node *child, *interfaces;
2091 struct netcp_device *netcp_device;
2092 struct device *dev = &pdev->dev;
2096 dev_err(dev, "could not find device info\n");
2100 /* Allocate a new NETCP device instance */
2101 netcp_device = devm_kzalloc(dev, sizeof(*netcp_device), GFP_KERNEL);
2105 pm_runtime_enable(&pdev->dev);
2106 ret = pm_runtime_get_sync(&pdev->dev);
2108 dev_err(dev, "Failed to enable NETCP power-domain\n");
2109 pm_runtime_disable(&pdev->dev);
2113 /* Initialize the NETCP device instance */
2114 INIT_LIST_HEAD(&netcp_device->interface_head);
2115 INIT_LIST_HEAD(&netcp_device->modpriv_head);
2116 netcp_device->device = dev;
2117 platform_set_drvdata(pdev, netcp_device);
2119 /* create interfaces */
2120 interfaces = of_get_child_by_name(node, "netcp-interfaces");
2122 dev_err(dev, "could not find netcp-interfaces node\n");
2127 for_each_available_child_of_node(interfaces, child) {
2128 ret = netcp_create_interface(netcp_device, child);
2130 dev_err(dev, "could not create interface(%s)\n",
2132 goto probe_quit_interface;
2136 /* Add the device instance to the list */
2137 list_add_tail(&netcp_device->device_list, &netcp_devices);
2141 probe_quit_interface:
2142 list_for_each_entry_safe(netcp_intf, netcp_tmp,
2143 &netcp_device->interface_head,
2145 netcp_delete_interface(netcp_device, netcp_intf->ndev);
2149 pm_runtime_put_sync(&pdev->dev);
2150 pm_runtime_disable(&pdev->dev);
2151 platform_set_drvdata(pdev, NULL);
2155 static int netcp_remove(struct platform_device *pdev)
2157 struct netcp_device *netcp_device = platform_get_drvdata(pdev);
2158 struct netcp_intf *netcp_intf, *netcp_tmp;
2159 struct netcp_inst_modpriv *inst_modpriv, *tmp;
2160 struct netcp_module *module;
2162 list_for_each_entry_safe(inst_modpriv, tmp, &netcp_device->modpriv_head,
2164 module = inst_modpriv->netcp_module;
2165 dev_dbg(&pdev->dev, "Removing module \"%s\"\n", module->name);
2166 module->remove(netcp_device, inst_modpriv->module_priv);
2167 list_del(&inst_modpriv->inst_list);
2168 kfree(inst_modpriv);
2171 /* now that all modules are removed, clean up the interfaces */
2172 list_for_each_entry_safe(netcp_intf, netcp_tmp,
2173 &netcp_device->interface_head,
2175 netcp_delete_interface(netcp_device, netcp_intf->ndev);
2178 WARN(!list_empty(&netcp_device->interface_head),
2179 "%s interface list not empty!\n", pdev->name);
2181 pm_runtime_put_sync(&pdev->dev);
2182 pm_runtime_disable(&pdev->dev);
2183 platform_set_drvdata(pdev, NULL);
2187 static const struct of_device_id of_match[] = {
2188 { .compatible = "ti,netcp-1.0", },
2191 MODULE_DEVICE_TABLE(of, of_match);
2193 static struct platform_driver netcp_driver = {
2195 .name = "netcp-1.0",
2196 .of_match_table = of_match,
2198 .probe = netcp_probe,
2199 .remove = netcp_remove,
2201 module_platform_driver(netcp_driver);
2203 MODULE_LICENSE("GPL v2");
2204 MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs");
2205 MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com");