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