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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / net / ethernet / ti / netcp_core.c
blob1f612268c9987796aa35e18c990dfd45fc45628f
1 /*
2 * Keystone NetCP Core driver
3 *
4 * Copyright (C) 2014 Texas Instruments Incorporated
5 * Authors: Sandeep Nair <sandeep_n@ti.com>
6 * Sandeep Paulraj <s-paulraj@ti.com>
7 * Cyril Chemparathy <cyril@ti.com>
8 * Santosh Shilimkar <santosh.shilimkar@ti.com>
9 * Murali Karicheri <m-karicheri2@ti.com>
10 * Wingman Kwok <w-kwok2@ti.com>
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation version 2.
15 *
16 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
17 * kind, whether express or implied; without even the implied warranty
18 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 */
21
22 #include <linux/io.h>
23 #include <linux/module.h>
24 #include <linux/of_net.h>
25 #include <linux/of_address.h>
26 #include <linux/if_vlan.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/platform_device.h>
29 #include <linux/soc/ti/knav_qmss.h>
30 #include <linux/soc/ti/knav_dma.h>
31
32 #include "netcp.h"
33
34 #define NETCP_SOP_OFFSET (NET_IP_ALIGN + NET_SKB_PAD)
35 #define NETCP_NAPI_WEIGHT 64
36 #define NETCP_TX_TIMEOUT (5 * HZ)
37 #define NETCP_PACKET_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN)
38 #define NETCP_MIN_PACKET_SIZE ETH_ZLEN
39 #define NETCP_MAX_MCAST_ADDR 16
40
41 #define NETCP_EFUSE_REG_INDEX 0
42
43 #define NETCP_MOD_PROBE_SKIPPED 1
44 #define NETCP_MOD_PROBE_FAILED 2
45
46 #define NETCP_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \
47 NETIF_MSG_DRV | NETIF_MSG_LINK | \
48 NETIF_MSG_IFUP | NETIF_MSG_INTR | \
49 NETIF_MSG_PROBE | NETIF_MSG_TIMER | \
50 NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \
51 NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \
52 NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \
53 NETIF_MSG_RX_STATUS)
54
55 #define NETCP_EFUSE_ADDR_SWAP 2
56
57 #define knav_queue_get_id(q) knav_queue_device_control(q, \
58 KNAV_QUEUE_GET_ID, (unsigned long)NULL)
59
60 #define knav_queue_enable_notify(q) knav_queue_device_control(q, \
61 KNAV_QUEUE_ENABLE_NOTIFY, \
62 (unsigned long)NULL)
63
64 #define knav_queue_disable_notify(q) knav_queue_device_control(q, \
65 KNAV_QUEUE_DISABLE_NOTIFY, \
66 (unsigned long)NULL)
67
68 #define knav_queue_get_count(q) knav_queue_device_control(q, \
69 KNAV_QUEUE_GET_COUNT, (unsigned long)NULL)
70
71 #define for_each_netcp_module(module) \
72 list_for_each_entry(module, &netcp_modules, module_list)
73
74 #define for_each_netcp_device_module(netcp_device, inst_modpriv) \
75 list_for_each_entry(inst_modpriv, \
76 &((netcp_device)->modpriv_head), inst_list)
77
78 #define for_each_module(netcp, intf_modpriv) \
79 list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list)
80
81 /* Module management structures */
82 struct netcp_device {
83 struct list_head device_list;
84 struct list_head interface_head;
85 struct list_head modpriv_head;
86 struct device *device;
87 };
88
89 struct netcp_inst_modpriv {
90 struct netcp_device *netcp_device;
91 struct netcp_module *netcp_module;
92 struct list_head inst_list;
93 void *module_priv;
94 };
95
96 struct netcp_intf_modpriv {
97 struct netcp_intf *netcp_priv;
98 struct netcp_module *netcp_module;
99 struct list_head intf_list;
100 void *module_priv;
101 };
102
103 struct netcp_tx_cb {
104 void *ts_context;
105 void (*txtstamp)(void *context, struct sk_buff *skb);
106 };
107
108 static LIST_HEAD(netcp_devices);
109 static LIST_HEAD(netcp_modules);
110 static DEFINE_MUTEX(netcp_modules_lock);
111
112 static int netcp_debug_level = -1;
113 module_param(netcp_debug_level, int, 0);
114 MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");
115
116 /* Helper functions - Get/Set */
117 static void get_pkt_info(dma_addr_t *buff, u32 *buff_len, dma_addr_t *ndesc,
118 struct knav_dma_desc *desc)
119 {
120 *buff_len = le32_to_cpu(desc->buff_len);
121 *buff = le32_to_cpu(desc->buff);
122 *ndesc = le32_to_cpu(desc->next_desc);
123 }
124
125 static void get_desc_info(u32 *desc_info, u32 *pkt_info,
126 struct knav_dma_desc *desc)
127 {
128 *desc_info = le32_to_cpu(desc->desc_info);
129 *pkt_info = le32_to_cpu(desc->packet_info);
130 }
131
132 static u32 get_sw_data(int index, struct knav_dma_desc *desc)
133 {
134 /* No Endian conversion needed as this data is untouched by hw */
135 return desc->sw_data[index];
136 }
137
138 /* use these macros to get sw data */
139 #define GET_SW_DATA0(desc) get_sw_data(0, desc)
140 #define GET_SW_DATA1(desc) get_sw_data(1, desc)
141 #define GET_SW_DATA2(desc) get_sw_data(2, desc)
142 #define GET_SW_DATA3(desc) get_sw_data(3, desc)
143
144 static void get_org_pkt_info(dma_addr_t *buff, u32 *buff_len,
145 struct knav_dma_desc *desc)
146 {
147 *buff = le32_to_cpu(desc->orig_buff);
148 *buff_len = le32_to_cpu(desc->orig_len);
149 }
150
151 static void get_words(dma_addr_t *words, int num_words, __le32 *desc)
152 {
153 int i;
154
155 for (i = 0; i < num_words; i++)
156 words[i] = le32_to_cpu(desc[i]);
157 }
158
159 static void set_pkt_info(dma_addr_t buff, u32 buff_len, u32 ndesc,
160 struct knav_dma_desc *desc)
161 {
162 desc->buff_len = cpu_to_le32(buff_len);
163 desc->buff = cpu_to_le32(buff);
164 desc->next_desc = cpu_to_le32(ndesc);
165 }
166
167 static void set_desc_info(u32 desc_info, u32 pkt_info,
168 struct knav_dma_desc *desc)
169 {
170 desc->desc_info = cpu_to_le32(desc_info);
171 desc->packet_info = cpu_to_le32(pkt_info);
172 }
173
174 static void set_sw_data(int index, u32 data, struct knav_dma_desc *desc)
175 {
176 /* No Endian conversion needed as this data is untouched by hw */
177 desc->sw_data[index] = data;
178 }
179
180 /* use these macros to set sw data */
181 #define SET_SW_DATA0(data, desc) set_sw_data(0, data, desc)
182 #define SET_SW_DATA1(data, desc) set_sw_data(1, data, desc)
183 #define SET_SW_DATA2(data, desc) set_sw_data(2, data, desc)
184 #define SET_SW_DATA3(data, desc) set_sw_data(3, data, desc)
185
186 static void set_org_pkt_info(dma_addr_t buff, u32 buff_len,
187 struct knav_dma_desc *desc)
188 {
189 desc->orig_buff = cpu_to_le32(buff);
190 desc->orig_len = cpu_to_le32(buff_len);
191 }
192
193 static void set_words(u32 *words, int num_words, __le32 *desc)
194 {
195 int i;
196
197 for (i = 0; i < num_words; i++)
198 desc[i] = cpu_to_le32(words[i]);
199 }
200
201 /* Read the e-fuse value as 32 bit values to be endian independent */
202 static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac, u32 swap)
203 {
204 unsigned int addr0, addr1;
205
206 addr1 = readl(efuse_mac + 4);
207 addr0 = readl(efuse_mac);
208
209 switch (swap) {
210 case NETCP_EFUSE_ADDR_SWAP:
211 addr0 = addr1;
212 addr1 = readl(efuse_mac);
213 break;
214 default:
215 break;
216 }
217
218 x[0] = (addr1 & 0x0000ff00) >> 8;
219 x[1] = addr1 & 0x000000ff;
220 x[2] = (addr0 & 0xff000000) >> 24;
221 x[3] = (addr0 & 0x00ff0000) >> 16;
222 x[4] = (addr0 & 0x0000ff00) >> 8;
223 x[5] = addr0 & 0x000000ff;
224
225 return 0;
226 }
227
228 /* Module management routines */
229 static int netcp_register_interface(struct netcp_intf *netcp)
230 {
231 int ret;
232
233 ret = register_netdev(netcp->ndev);
234 if (!ret)
235 netcp->netdev_registered = true;
236 return ret;
237 }
238
239 static int netcp_module_probe(struct netcp_device *netcp_device,
240 struct netcp_module *module)
241 {
242 struct device *dev = netcp_device->device;
243 struct device_node *devices, *interface, *node = dev->of_node;
244 struct device_node *child;
245 struct netcp_inst_modpriv *inst_modpriv;
246 struct netcp_intf *netcp_intf;
247 struct netcp_module *tmp;
248 bool primary_module_registered = false;
249 int ret;
250
251 /* Find this module in the sub-tree for this device */
252 devices = of_get_child_by_name(node, "netcp-devices");
253 if (!devices) {
254 dev_err(dev, "could not find netcp-devices node\n");
255 return NETCP_MOD_PROBE_SKIPPED;
256 }
257
258 for_each_available_child_of_node(devices, child) {
259 const char *name;
260 char node_name[32];
261
262 if (of_property_read_string(node, "label", &name) < 0) {
263 snprintf(node_name, sizeof(node_name), "%pOFn", child);
264 name = node_name;
265 }
266 if (!strcasecmp(module->name, name))
267 break;
268 }
269
270 of_node_put(devices);
271 /* If module not used for this device, skip it */
272 if (!child) {
273 dev_warn(dev, "module(%s) not used for device\n", module->name);
274 return NETCP_MOD_PROBE_SKIPPED;
275 }
276
277 inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL);
278 if (!inst_modpriv) {
279 of_node_put(child);
280 return -ENOMEM;
281 }
282
283 inst_modpriv->netcp_device = netcp_device;
284 inst_modpriv->netcp_module = module;
285 list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head);
286
287 ret = module->probe(netcp_device, dev, child,
288 &inst_modpriv->module_priv);
289 of_node_put(child);
290 if (ret) {
291 dev_err(dev, "Probe of module(%s) failed with %d\n",
292 module->name, ret);
293 list_del(&inst_modpriv->inst_list);
294 devm_kfree(dev, inst_modpriv);
295 return NETCP_MOD_PROBE_FAILED;
296 }
297
298 /* Attach modules only if the primary module is probed */
299 for_each_netcp_module(tmp) {
300 if (tmp->primary)
301 primary_module_registered = true;
302 }
303
304 if (!primary_module_registered)
305 return 0;
306
307 /* Attach module to interfaces */
308 list_for_each_entry(netcp_intf, &netcp_device->interface_head,
309 interface_list) {
310 struct netcp_intf_modpriv *intf_modpriv;
311
312 intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv),
313 GFP_KERNEL);
314 if (!intf_modpriv)
315 return -ENOMEM;
316
317 interface = of_parse_phandle(netcp_intf->node_interface,
318 module->name, 0);
319
320 if (!interface) {
321 devm_kfree(dev, intf_modpriv);
322 continue;
323 }
324
325 intf_modpriv->netcp_priv = netcp_intf;
326 intf_modpriv->netcp_module = module;
327 list_add_tail(&intf_modpriv->intf_list,
328 &netcp_intf->module_head);
329
330 ret = module->attach(inst_modpriv->module_priv,
331 netcp_intf->ndev, interface,
332 &intf_modpriv->module_priv);
333 of_node_put(interface);
334 if (ret) {
335 dev_dbg(dev, "Attach of module %s declined with %d\n",
336 module->name, ret);
337 list_del(&intf_modpriv->intf_list);
338 devm_kfree(dev, intf_modpriv);
339 continue;
340 }
341 }
342
343 /* Now register the interface with netdev */
344 list_for_each_entry(netcp_intf,
345 &netcp_device->interface_head,
346 interface_list) {
347 /* If interface not registered then register now */
348 if (!netcp_intf->netdev_registered) {
349 ret = netcp_register_interface(netcp_intf);
350 if (ret)
351 return -ENODEV;
352 }
353 }
354 return 0;
355 }
356
357 int netcp_register_module(struct netcp_module *module)
358 {
359 struct netcp_device *netcp_device;
360 struct netcp_module *tmp;
361 int ret;
362
363 if (!module->name) {
364 WARN(1, "error registering netcp module: no name\n");
365 return -EINVAL;
366 }
367
368 if (!module->probe) {
369 WARN(1, "error registering netcp module: no probe\n");
370 return -EINVAL;
371 }
372
373 mutex_lock(&netcp_modules_lock);
374
375 for_each_netcp_module(tmp) {
376 if (!strcasecmp(tmp->name, module->name)) {
377 mutex_unlock(&netcp_modules_lock);
378 return -EEXIST;
379 }
380 }
381 list_add_tail(&module->module_list, &netcp_modules);
382
383 list_for_each_entry(netcp_device, &netcp_devices, device_list) {
384 ret = netcp_module_probe(netcp_device, module);
385 if (ret < 0)
386 goto fail;
387 }
388 mutex_unlock(&netcp_modules_lock);
389 return 0;
390
391 fail:
392 mutex_unlock(&netcp_modules_lock);
393 netcp_unregister_module(module);
394 return ret;
395 }
396 EXPORT_SYMBOL_GPL(netcp_register_module);
397
398 static void netcp_release_module(struct netcp_device *netcp_device,
399 struct netcp_module *module)
400 {
401 struct netcp_inst_modpriv *inst_modpriv, *inst_tmp;
402 struct netcp_intf *netcp_intf, *netcp_tmp;
403 struct device *dev = netcp_device->device;
404
405 /* Release the module from each interface */
406 list_for_each_entry_safe(netcp_intf, netcp_tmp,
407 &netcp_device->interface_head,
408 interface_list) {
409 struct netcp_intf_modpriv *intf_modpriv, *intf_tmp;
410
411 list_for_each_entry_safe(intf_modpriv, intf_tmp,
412 &netcp_intf->module_head,
413 intf_list) {
414 if (intf_modpriv->netcp_module == module) {
415 module->release(intf_modpriv->module_priv);
416 list_del(&intf_modpriv->intf_list);
417 devm_kfree(dev, intf_modpriv);
418 break;
419 }
420 }
421 }
422
423 /* Remove the module from each instance */
424 list_for_each_entry_safe(inst_modpriv, inst_tmp,
425 &netcp_device->modpriv_head, inst_list) {
426 if (inst_modpriv->netcp_module == module) {
427 module->remove(netcp_device,
428 inst_modpriv->module_priv);
429 list_del(&inst_modpriv->inst_list);
430 devm_kfree(dev, inst_modpriv);
431 break;
432 }
433 }
434 }
435
436 void netcp_unregister_module(struct netcp_module *module)
437 {
438 struct netcp_device *netcp_device;
439 struct netcp_module *module_tmp;
440
441 mutex_lock(&netcp_modules_lock);
442
443 list_for_each_entry(netcp_device, &netcp_devices, device_list) {
444 netcp_release_module(netcp_device, module);
445 }
446
447 /* Remove the module from the module list */
448 for_each_netcp_module(module_tmp) {
449 if (module == module_tmp) {
450 list_del(&module->module_list);
451 break;
452 }
453 }
454
455 mutex_unlock(&netcp_modules_lock);
456 }
457 EXPORT_SYMBOL_GPL(netcp_unregister_module);
458
459 void *netcp_module_get_intf_data(struct netcp_module *module,
460 struct netcp_intf *intf)
461 {
462 struct netcp_intf_modpriv *intf_modpriv;
463
464 list_for_each_entry(intf_modpriv, &intf->module_head, intf_list)
465 if (intf_modpriv->netcp_module == module)
466 return intf_modpriv->module_priv;
467 return NULL;
468 }
469 EXPORT_SYMBOL_GPL(netcp_module_get_intf_data);
470
471 /* Module TX and RX Hook management */
472 struct netcp_hook_list {
473 struct list_head list;
474 netcp_hook_rtn *hook_rtn;
475 void *hook_data;
476 int order;
477 };
478
479 int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
480 netcp_hook_rtn *hook_rtn, void *hook_data)
481 {
482 struct netcp_hook_list *entry;
483 struct netcp_hook_list *next;
484 unsigned long flags;
485
486 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
487 if (!entry)
488 return -ENOMEM;
489
490 entry->hook_rtn = hook_rtn;
491 entry->hook_data = hook_data;
492 entry->order = order;
493
494 spin_lock_irqsave(&netcp_priv->lock, flags);
495 list_for_each_entry(next, &netcp_priv->txhook_list_head, list) {
496 if (next->order > order)
497 break;
498 }
499 __list_add(&entry->list, next->list.prev, &next->list);
500 spin_unlock_irqrestore(&netcp_priv->lock, flags);
501
502 return 0;
503 }
504 EXPORT_SYMBOL_GPL(netcp_register_txhook);
505
506 int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,
507 netcp_hook_rtn *hook_rtn, void *hook_data)
508 {
509 struct netcp_hook_list *next, *n;
510 unsigned long flags;
511
512 spin_lock_irqsave(&netcp_priv->lock, flags);
513 list_for_each_entry_safe(next, n, &netcp_priv->txhook_list_head, list) {
514 if ((next->order == order) &&
515 (next->hook_rtn == hook_rtn) &&
516 (next->hook_data == hook_data)) {
517 list_del(&next->list);
518 spin_unlock_irqrestore(&netcp_priv->lock, flags);
519 devm_kfree(netcp_priv->dev, next);
520 return 0;
521 }
522 }
523 spin_unlock_irqrestore(&netcp_priv->lock, flags);
524 return -ENOENT;
525 }
526 EXPORT_SYMBOL_GPL(netcp_unregister_txhook);
527
528 int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,
529 netcp_hook_rtn *hook_rtn, void *hook_data)
530 {
531 struct netcp_hook_list *entry;
532 struct netcp_hook_list *next;
533 unsigned long flags;
534
535 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
536 if (!entry)
537 return -ENOMEM;
538
539 entry->hook_rtn = hook_rtn;
540 entry->hook_data = hook_data;
541 entry->order = order;
542
543 spin_lock_irqsave(&netcp_priv->lock, flags);
544 list_for_each_entry(next, &netcp_priv->rxhook_list_head, list) {
545 if (next->order > order)
546 break;
547 }
548 __list_add(&entry->list, next->list.prev, &next->list);
549 spin_unlock_irqrestore(&netcp_priv->lock, flags);
550
551 return 0;
552 }
553 EXPORT_SYMBOL_GPL(netcp_register_rxhook);
554
555 int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,
556 netcp_hook_rtn *hook_rtn, void *hook_data)
557 {
558 struct netcp_hook_list *next, *n;
559 unsigned long flags;
560
561 spin_lock_irqsave(&netcp_priv->lock, flags);
562 list_for_each_entry_safe(next, n, &netcp_priv->rxhook_list_head, list) {
563 if ((next->order == order) &&
564 (next->hook_rtn == hook_rtn) &&
565 (next->hook_data == hook_data)) {
566 list_del(&next->list);
567 spin_unlock_irqrestore(&netcp_priv->lock, flags);
568 devm_kfree(netcp_priv->dev, next);
569 return 0;
570 }
571 }
572 spin_unlock_irqrestore(&netcp_priv->lock, flags);
573
574 return -ENOENT;
575 }
576 EXPORT_SYMBOL_GPL(netcp_unregister_rxhook);
577
578 static void netcp_frag_free(bool is_frag, void *ptr)
579 {
580 if (is_frag)
581 skb_free_frag(ptr);
582 else
583 kfree(ptr);
584 }
585
586 static void netcp_free_rx_desc_chain(struct netcp_intf *netcp,
587 struct knav_dma_desc *desc)
588 {
589 struct knav_dma_desc *ndesc;
590 dma_addr_t dma_desc, dma_buf;
591 unsigned int buf_len, dma_sz = sizeof(*ndesc);
592 void *buf_ptr;
593 u32 tmp;
594
595 get_words(&dma_desc, 1, &desc->next_desc);
596
597 while (dma_desc) {
598 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
599 if (unlikely(!ndesc)) {
600 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
601 break;
602 }
603 get_pkt_info(&dma_buf, &tmp, &dma_desc, ndesc);
604 /* warning!!!! We are retrieving the virtual ptr in the sw_data
605 * field as a 32bit value. Will not work on 64bit machines
606 */
607 buf_ptr = (void *)GET_SW_DATA0(ndesc);
608 buf_len = (int)GET_SW_DATA1(desc);
609 dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE);
610 __free_page(buf_ptr);
611 knav_pool_desc_put(netcp->rx_pool, desc);
612 }
613 /* warning!!!! We are retrieving the virtual ptr in the sw_data
614 * field as a 32bit value. Will not work on 64bit machines
615 */
616 buf_ptr = (void *)GET_SW_DATA0(desc);
617 buf_len = (int)GET_SW_DATA1(desc);
618
619 if (buf_ptr)
620 netcp_frag_free(buf_len <= PAGE_SIZE, buf_ptr);
621 knav_pool_desc_put(netcp->rx_pool, desc);
622 }
623
624 static void netcp_empty_rx_queue(struct netcp_intf *netcp)
625 {
626 struct netcp_stats *rx_stats = &netcp->stats;
627 struct knav_dma_desc *desc;
628 unsigned int dma_sz;
629 dma_addr_t dma;
630
631 for (; ;) {
632 dma = knav_queue_pop(netcp->rx_queue, &dma_sz);
633 if (!dma)
634 break;
635
636 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
637 if (unlikely(!desc)) {
638 dev_err(netcp->ndev_dev, "%s: failed to unmap Rx desc\n",
639 __func__);
640 rx_stats->rx_errors++;
641 continue;
642 }
643 netcp_free_rx_desc_chain(netcp, desc);
644 rx_stats->rx_dropped++;
645 }
646 }
647
648 static int netcp_process_one_rx_packet(struct netcp_intf *netcp)
649 {
650 struct netcp_stats *rx_stats = &netcp->stats;
651 unsigned int dma_sz, buf_len, org_buf_len;
652 struct knav_dma_desc *desc, *ndesc;
653 unsigned int pkt_sz = 0, accum_sz;
654 struct netcp_hook_list *rx_hook;
655 dma_addr_t dma_desc, dma_buff;
656 struct netcp_packet p_info;
657 struct sk_buff *skb;
658 void *org_buf_ptr;
659 u32 tmp;
660
661 dma_desc = knav_queue_pop(netcp->rx_queue, &dma_sz);
662 if (!dma_desc)
663 return -1;
664
665 desc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
666 if (unlikely(!desc)) {
667 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
668 return 0;
669 }
670
671 get_pkt_info(&dma_buff, &buf_len, &dma_desc, desc);
672 /* warning!!!! We are retrieving the virtual ptr in the sw_data
673 * field as a 32bit value. Will not work on 64bit machines
674 */
675 org_buf_ptr = (void *)GET_SW_DATA0(desc);
676 org_buf_len = (int)GET_SW_DATA1(desc);
677
678 if (unlikely(!org_buf_ptr)) {
679 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
680 goto free_desc;
681 }
682
683 pkt_sz &= KNAV_DMA_DESC_PKT_LEN_MASK;
684 accum_sz = buf_len;
685 dma_unmap_single(netcp->dev, dma_buff, buf_len, DMA_FROM_DEVICE);
686
687 /* Build a new sk_buff for the primary buffer */
688 skb = build_skb(org_buf_ptr, org_buf_len);
689 if (unlikely(!skb)) {
690 dev_err(netcp->ndev_dev, "build_skb() failed\n");
691 goto free_desc;
692 }
693
694 /* update data, tail and len */
695 skb_reserve(skb, NETCP_SOP_OFFSET);
696 __skb_put(skb, buf_len);
697
698 /* Fill in the page fragment list */
699 while (dma_desc) {
700 struct page *page;
701
702 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
703 if (unlikely(!ndesc)) {
704 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
705 goto free_desc;
706 }
707
708 get_pkt_info(&dma_buff, &buf_len, &dma_desc, ndesc);
709 /* warning!!!! We are retrieving the virtual ptr in the sw_data
710 * field as a 32bit value. Will not work on 64bit machines
711 */
712 page = (struct page *)GET_SW_DATA0(ndesc);
713
714 if (likely(dma_buff && buf_len && page)) {
715 dma_unmap_page(netcp->dev, dma_buff, PAGE_SIZE,
716 DMA_FROM_DEVICE);
717 } else {
718 dev_err(netcp->ndev_dev, "Bad Rx desc dma_buff(%pad), len(%d), page(%p)\n",
719 &dma_buff, buf_len, page);
720 goto free_desc;
721 }
722
723 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
724 offset_in_page(dma_buff), buf_len, PAGE_SIZE);
725 accum_sz += buf_len;
726
727 /* Free the descriptor */
728 knav_pool_desc_put(netcp->rx_pool, ndesc);
729 }
730
731 /* check for packet len and warn */
732 if (unlikely(pkt_sz != accum_sz))
733 dev_dbg(netcp->ndev_dev, "mismatch in packet size(%d) & sum of fragments(%d)\n",
734 pkt_sz, accum_sz);
735
736 /* Newer version of the Ethernet switch can trim the Ethernet FCS
737 * from the packet and is indicated in hw_cap. So trim it only for
738 * older h/w
739 */
740 if (!(netcp->hw_cap & ETH_SW_CAN_REMOVE_ETH_FCS))
741 __pskb_trim(skb, skb->len - ETH_FCS_LEN);
742
743 /* Call each of the RX hooks */
744 p_info.skb = skb;
745 skb->dev = netcp->ndev;
746 p_info.rxtstamp_complete = false;
747 get_desc_info(&tmp, &p_info.eflags, desc);
748 p_info.epib = desc->epib;
749 p_info.psdata = (u32 __force *)desc->psdata;
750 p_info.eflags = ((p_info.eflags >> KNAV_DMA_DESC_EFLAGS_SHIFT) &
751 KNAV_DMA_DESC_EFLAGS_MASK);
752 list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) {
753 int ret;
754
755 ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data,
756 &p_info);
757 if (unlikely(ret)) {
758 dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n",
759 rx_hook->order, ret);
760 /* Free the primary descriptor */
761 rx_stats->rx_dropped++;
762 knav_pool_desc_put(netcp->rx_pool, desc);
763 dev_kfree_skb(skb);
764 return 0;
765 }
766 }
767 /* Free the primary descriptor */
768 knav_pool_desc_put(netcp->rx_pool, desc);
769
770 u64_stats_update_begin(&rx_stats->syncp_rx);
771 rx_stats->rx_packets++;
772 rx_stats->rx_bytes += skb->len;
773 u64_stats_update_end(&rx_stats->syncp_rx);
774
775 /* push skb up the stack */
776 skb->protocol = eth_type_trans(skb, netcp->ndev);
777 netif_receive_skb(skb);
778 return 0;
779
780 free_desc:
781 netcp_free_rx_desc_chain(netcp, desc);
782 rx_stats->rx_errors++;
783 return 0;
784 }
785
786 static int netcp_process_rx_packets(struct netcp_intf *netcp,
787 unsigned int budget)
788 {
789 int i;
790
791 for (i = 0; (i < budget) && !netcp_process_one_rx_packet(netcp); i++)
792 ;
793 return i;
794 }
795
796 /* Release descriptors and attached buffers from Rx FDQ */
797 static void netcp_free_rx_buf(struct netcp_intf *netcp, int fdq)
798 {
799 struct knav_dma_desc *desc;
800 unsigned int buf_len, dma_sz;
801 dma_addr_t dma;
802 void *buf_ptr;
803
804 /* Allocate descriptor */
805 while ((dma = knav_queue_pop(netcp->rx_fdq[fdq], &dma_sz))) {
806 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
807 if (unlikely(!desc)) {
808 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
809 continue;
810 }
811
812 get_org_pkt_info(&dma, &buf_len, desc);
813 /* warning!!!! We are retrieving the virtual ptr in the sw_data
814 * field as a 32bit value. Will not work on 64bit machines
815 */
816 buf_ptr = (void *)GET_SW_DATA0(desc);
817
818 if (unlikely(!dma)) {
819 dev_err(netcp->ndev_dev, "NULL orig_buff in desc\n");
820 knav_pool_desc_put(netcp->rx_pool, desc);
821 continue;
822 }
823
824 if (unlikely(!buf_ptr)) {
825 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
826 knav_pool_desc_put(netcp->rx_pool, desc);
827 continue;
828 }
829
830 if (fdq == 0) {
831 dma_unmap_single(netcp->dev, dma, buf_len,
832 DMA_FROM_DEVICE);
833 netcp_frag_free((buf_len <= PAGE_SIZE), buf_ptr);
834 } else {
835 dma_unmap_page(netcp->dev, dma, buf_len,
836 DMA_FROM_DEVICE);
837 __free_page(buf_ptr);
838 }
839
840 knav_pool_desc_put(netcp->rx_pool, desc);
841 }
842 }
843
844 static void netcp_rxpool_free(struct netcp_intf *netcp)
845 {
846 int i;
847
848 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
849 !IS_ERR_OR_NULL(netcp->rx_fdq[i]); i++)
850 netcp_free_rx_buf(netcp, i);
851
852 if (knav_pool_count(netcp->rx_pool) != netcp->rx_pool_size)
853 dev_err(netcp->ndev_dev, "Lost Rx (%d) descriptors\n",
854 netcp->rx_pool_size - knav_pool_count(netcp->rx_pool));
855
856 knav_pool_destroy(netcp->rx_pool);
857 netcp->rx_pool = NULL;
858 }
859
860 static int netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq)
861 {
862 struct knav_dma_desc *hwdesc;
863 unsigned int buf_len, dma_sz;
864 u32 desc_info, pkt_info;
865 struct page *page;
866 dma_addr_t dma;
867 void *bufptr;
868 u32 sw_data[2];
869
870 /* Allocate descriptor */
871 hwdesc = knav_pool_desc_get(netcp->rx_pool);
872 if (IS_ERR_OR_NULL(hwdesc)) {
873 dev_dbg(netcp->ndev_dev, "out of rx pool desc\n");
874 return -ENOMEM;
875 }
876
877 if (likely(fdq == 0)) {
878 unsigned int primary_buf_len;
879 /* Allocate a primary receive queue entry */
880 buf_len = NETCP_PACKET_SIZE + NETCP_SOP_OFFSET;
881 primary_buf_len = SKB_DATA_ALIGN(buf_len) +
882 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
883
884 bufptr = netdev_alloc_frag(primary_buf_len);
885 sw_data[1] = primary_buf_len;
886
887 if (unlikely(!bufptr)) {
888 dev_warn_ratelimited(netcp->ndev_dev,
889 "Primary RX buffer alloc failed\n");
890 goto fail;
891 }
892 dma = dma_map_single(netcp->dev, bufptr, buf_len,
893 DMA_TO_DEVICE);
894 if (unlikely(dma_mapping_error(netcp->dev, dma)))
895 goto fail;
896
897 /* warning!!!! We are saving the virtual ptr in the sw_data
898 * field as a 32bit value. Will not work on 64bit machines
899 */
900 sw_data[0] = (u32)bufptr;
901 } else {
902 /* Allocate a secondary receive queue entry */
903 page = alloc_page(GFP_ATOMIC | GFP_DMA);
904 if (unlikely(!page)) {
905 dev_warn_ratelimited(netcp->ndev_dev, "Secondary page alloc failed\n");
906 goto fail;
907 }
908 buf_len = PAGE_SIZE;
909 dma = dma_map_page(netcp->dev, page, 0, buf_len, DMA_TO_DEVICE);
910 /* warning!!!! We are saving the virtual ptr in the sw_data
911 * field as a 32bit value. Will not work on 64bit machines
912 */
913 sw_data[0] = (u32)page;
914 sw_data[1] = 0;
915 }
916
917 desc_info = KNAV_DMA_DESC_PS_INFO_IN_DESC;
918 desc_info |= buf_len & KNAV_DMA_DESC_PKT_LEN_MASK;
919 pkt_info = KNAV_DMA_DESC_HAS_EPIB;
920 pkt_info |= KNAV_DMA_NUM_PS_WORDS << KNAV_DMA_DESC_PSLEN_SHIFT;
921 pkt_info |= (netcp->rx_queue_id & KNAV_DMA_DESC_RETQ_MASK) <<
922 KNAV_DMA_DESC_RETQ_SHIFT;
923 set_org_pkt_info(dma, buf_len, hwdesc);
924 SET_SW_DATA0(sw_data[0], hwdesc);
925 SET_SW_DATA1(sw_data[1], hwdesc);
926 set_desc_info(desc_info, pkt_info, hwdesc);
927
928 /* Push to FDQs */
929 knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma,
930 &dma_sz);
931 knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0);
932 return 0;
933
934 fail:
935 knav_pool_desc_put(netcp->rx_pool, hwdesc);
936 return -ENOMEM;
937 }
938
939 /* Refill Rx FDQ with descriptors & attached buffers */
940 static void netcp_rxpool_refill(struct netcp_intf *netcp)
941 {
942 u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0};
943 int i, ret = 0;
944
945 /* Calculate the FDQ deficit and refill */
946 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) {
947 fdq_deficit[i] = netcp->rx_queue_depths[i] -
948 knav_queue_get_count(netcp->rx_fdq[i]);
949
950 while (fdq_deficit[i]-- && !ret)
951 ret = netcp_allocate_rx_buf(netcp, i);
952 } /* end for fdqs */
953 }
954
955 /* NAPI poll */
956 static int netcp_rx_poll(struct napi_struct *napi, int budget)
957 {
958 struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
959 rx_napi);
960 unsigned int packets;
961
962 packets = netcp_process_rx_packets(netcp, budget);
963
964 netcp_rxpool_refill(netcp);
965 if (packets < budget) {
966 napi_complete_done(&netcp->rx_napi, packets);
967 knav_queue_enable_notify(netcp->rx_queue);
968 }
969
970 return packets;
971 }
972
973 static void netcp_rx_notify(void *arg)
974 {
975 struct netcp_intf *netcp = arg;
976
977 knav_queue_disable_notify(netcp->rx_queue);
978 napi_schedule(&netcp->rx_napi);
979 }
980
981 static void netcp_free_tx_desc_chain(struct netcp_intf *netcp,
982 struct knav_dma_desc *desc,
983 unsigned int desc_sz)
984 {
985 struct knav_dma_desc *ndesc = desc;
986 dma_addr_t dma_desc, dma_buf;
987 unsigned int buf_len;
988
989 while (ndesc) {
990 get_pkt_info(&dma_buf, &buf_len, &dma_desc, ndesc);
991
992 if (dma_buf && buf_len)
993 dma_unmap_single(netcp->dev, dma_buf, buf_len,
994 DMA_TO_DEVICE);
995 else
996 dev_warn(netcp->ndev_dev, "bad Tx desc buf(%pad), len(%d)\n",
997 &dma_buf, buf_len);
998
999 knav_pool_desc_put(netcp->tx_pool, ndesc);
1000 ndesc = NULL;
1001 if (dma_desc) {
1002 ndesc = knav_pool_desc_unmap(netcp->tx_pool, dma_desc,
1003 desc_sz);
1004 if (!ndesc)
1005 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
1006 }
1007 }
1008 }
1009
1010 static int netcp_process_tx_compl_packets(struct netcp_intf *netcp,
1011 unsigned int budget)
1012 {
1013 struct netcp_stats *tx_stats = &netcp->stats;
1014 struct knav_dma_desc *desc;
1015 struct netcp_tx_cb *tx_cb;
1016 struct sk_buff *skb;
1017 unsigned int dma_sz;
1018 dma_addr_t dma;
1019 int pkts = 0;
1020
1021 while (budget--) {
1022 dma = knav_queue_pop(netcp->tx_compl_q, &dma_sz);
1023 if (!dma)
1024 break;
1025 desc = knav_pool_desc_unmap(netcp->tx_pool, dma, dma_sz);
1026 if (unlikely(!desc)) {
1027 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
1028 tx_stats->tx_errors++;
1029 continue;
1030 }
1031
1032 /* warning!!!! We are retrieving the virtual ptr in the sw_data
1033 * field as a 32bit value. Will not work on 64bit machines
1034 */
1035 skb = (struct sk_buff *)GET_SW_DATA0(desc);
1036 netcp_free_tx_desc_chain(netcp, desc, dma_sz);
1037 if (!skb) {
1038 dev_err(netcp->ndev_dev, "No skb in Tx desc\n");
1039 tx_stats->tx_errors++;
1040 continue;
1041 }
1042
1043 tx_cb = (struct netcp_tx_cb *)skb->cb;
1044 if (tx_cb->txtstamp)
1045 tx_cb->txtstamp(tx_cb->ts_context, skb);
1046
1047 if (netif_subqueue_stopped(netcp->ndev, skb) &&
1048 netif_running(netcp->ndev) &&
1049 (knav_pool_count(netcp->tx_pool) >
1050 netcp->tx_resume_threshold)) {
1051 u16 subqueue = skb_get_queue_mapping(skb);
1052
1053 netif_wake_subqueue(netcp->ndev, subqueue);
1054 }
1055
1056 u64_stats_update_begin(&tx_stats->syncp_tx);
1057 tx_stats->tx_packets++;
1058 tx_stats->tx_bytes += skb->len;
1059 u64_stats_update_end(&tx_stats->syncp_tx);
1060 dev_kfree_skb(skb);
1061 pkts++;
1062 }
1063 return pkts;
1064 }
1065
1066 static int netcp_tx_poll(struct napi_struct *napi, int budget)
1067 {
1068 int packets;
1069 struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
1070 tx_napi);
1071
1072 packets = netcp_process_tx_compl_packets(netcp, budget);
1073 if (packets < budget) {
1074 napi_complete(&netcp->tx_napi);
1075 knav_queue_enable_notify(netcp->tx_compl_q);
1076 }
1077
1078 return packets;
1079 }
1080
1081 static void netcp_tx_notify(void *arg)
1082 {
1083 struct netcp_intf *netcp = arg;
1084
1085 knav_queue_disable_notify(netcp->tx_compl_q);
1086 napi_schedule(&netcp->tx_napi);
1087 }
1088
1089 static struct knav_dma_desc*
1090 netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp)
1091 {
1092 struct knav_dma_desc *desc, *ndesc, *pdesc;
1093 unsigned int pkt_len = skb_headlen(skb);
1094 struct device *dev = netcp->dev;
1095 dma_addr_t dma_addr;
1096 unsigned int dma_sz;
1097 int i;
1098
1099 /* Map the linear buffer */
1100 dma_addr = dma_map_single(dev, skb->data, pkt_len, DMA_TO_DEVICE);
1101 if (unlikely(dma_mapping_error(dev, dma_addr))) {
1102 dev_err(netcp->ndev_dev, "Failed to map skb buffer\n");
1103 return NULL;
1104 }
1105
1106 desc = knav_pool_desc_get(netcp->tx_pool);
1107 if (IS_ERR_OR_NULL(desc)) {
1108 dev_err(netcp->ndev_dev, "out of TX desc\n");
1109 dma_unmap_single(dev, dma_addr, pkt_len, DMA_TO_DEVICE);
1110 return NULL;
1111 }
1112
1113 set_pkt_info(dma_addr, pkt_len, 0, desc);
1114 if (skb_is_nonlinear(skb)) {
1115 prefetchw(skb_shinfo(skb));
1116 } else {
1117 desc->next_desc = 0;
1118 goto upd_pkt_len;
1119 }
1120
1121 pdesc = desc;
1122
1123 /* Handle the case where skb is fragmented in pages */
1124 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1125 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1126 struct page *page = skb_frag_page(frag);
1127 u32 page_offset = frag->page_offset;
1128 u32 buf_len = skb_frag_size(frag);
1129 dma_addr_t desc_dma;
1130 u32 desc_dma_32;
1131
1132 dma_addr = dma_map_page(dev, page, page_offset, buf_len,
1133 DMA_TO_DEVICE);
1134 if (unlikely(!dma_addr)) {
1135 dev_err(netcp->ndev_dev, "Failed to map skb page\n");
1136 goto free_descs;
1137 }
1138
1139 ndesc = knav_pool_desc_get(netcp->tx_pool);
1140 if (IS_ERR_OR_NULL(ndesc)) {
1141 dev_err(netcp->ndev_dev, "out of TX desc for frags\n");
1142 dma_unmap_page(dev, dma_addr, buf_len, DMA_TO_DEVICE);
1143 goto free_descs;
1144 }
1145
1146 desc_dma = knav_pool_desc_virt_to_dma(netcp->tx_pool, ndesc);
1147 set_pkt_info(dma_addr, buf_len, 0, ndesc);
1148 desc_dma_32 = (u32)desc_dma;
1149 set_words(&desc_dma_32, 1, &pdesc->next_desc);
1150 pkt_len += buf_len;
1151 if (pdesc != desc)
1152 knav_pool_desc_map(netcp->tx_pool, pdesc,
1153 sizeof(*pdesc), &desc_dma, &dma_sz);
1154 pdesc = ndesc;
1155 }
1156 if (pdesc != desc)
1157 knav_pool_desc_map(netcp->tx_pool, pdesc, sizeof(*pdesc),
1158 &dma_addr, &dma_sz);
1159
1160 /* frag list based linkage is not supported for now. */
1161 if (skb_shinfo(skb)->frag_list) {
1162 dev_err_ratelimited(netcp->ndev_dev, "NETIF_F_FRAGLIST not supported\n");
1163 goto free_descs;
1164 }
1165
1166 upd_pkt_len:
1167 WARN_ON(pkt_len != skb->len);
1168
1169 pkt_len &= KNAV_DMA_DESC_PKT_LEN_MASK;
1170 set_words(&pkt_len, 1, &desc->desc_info);
1171 return desc;
1172
1173 free_descs:
1174 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
1175 return NULL;
1176 }
1177
1178 static int netcp_tx_submit_skb(struct netcp_intf *netcp,
1179 struct sk_buff *skb,
1180 struct knav_dma_desc *desc)
1181 {
1182 struct netcp_tx_pipe *tx_pipe = NULL;
1183 struct netcp_hook_list *tx_hook;
1184 struct netcp_packet p_info;
1185 struct netcp_tx_cb *tx_cb;
1186 unsigned int dma_sz;
1187 dma_addr_t dma;
1188 u32 tmp = 0;
1189 int ret = 0;
1190
1191 p_info.netcp = netcp;
1192 p_info.skb = skb;
1193 p_info.tx_pipe = NULL;
1194 p_info.psdata_len = 0;
1195 p_info.ts_context = NULL;
1196 p_info.txtstamp = NULL;
1197 p_info.epib = desc->epib;
1198 p_info.psdata = (u32 __force *)desc->psdata;
1199 memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(__le32));
1200
1201 /* Find out where to inject the packet for transmission */
1202 list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) {
1203 ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data,
1204 &p_info);
1205 if (unlikely(ret != 0)) {
1206 dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n",
1207 tx_hook->order, ret);
1208 ret = (ret < 0) ? ret : NETDEV_TX_OK;
1209 goto out;
1210 }
1211 }
1212
1213 /* Make sure some TX hook claimed the packet */
1214 tx_pipe = p_info.tx_pipe;
1215 if (!tx_pipe) {
1216 dev_err(netcp->ndev_dev, "No TX hook claimed the packet!\n");
1217 ret = -ENXIO;
1218 goto out;
1219 }
1220
1221 tx_cb = (struct netcp_tx_cb *)skb->cb;
1222 tx_cb->ts_context = p_info.ts_context;
1223 tx_cb->txtstamp = p_info.txtstamp;
1224
1225 /* update descriptor */
1226 if (p_info.psdata_len) {
1227 /* psdata points to both native-endian and device-endian data */
1228 __le32 *psdata = (void __force *)p_info.psdata;
1229
1230 set_words((u32 *)psdata +
1231 (KNAV_DMA_NUM_PS_WORDS - p_info.psdata_len),
1232 p_info.psdata_len, psdata);
1233 tmp |= (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) <<
1234 KNAV_DMA_DESC_PSLEN_SHIFT;
1235 }
1236
1237 tmp |= KNAV_DMA_DESC_HAS_EPIB |
1238 ((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<
1239 KNAV_DMA_DESC_RETQ_SHIFT);
1240
1241 if (!(tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO)) {
1242 tmp |= ((tx_pipe->switch_to_port & KNAV_DMA_DESC_PSFLAG_MASK) <<
1243 KNAV_DMA_DESC_PSFLAG_SHIFT);
1244 }
1245
1246 set_words(&tmp, 1, &desc->packet_info);
1247 /* warning!!!! We are saving the virtual ptr in the sw_data
1248 * field as a 32bit value. Will not work on 64bit machines
1249 */
1250 SET_SW_DATA0((u32)skb, desc);
1251
1252 if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) {
1253 tmp = tx_pipe->switch_to_port;
1254 set_words(&tmp, 1, &desc->tag_info);
1255 }
1256
1257 /* submit packet descriptor */
1258 ret = knav_pool_desc_map(netcp->tx_pool, desc, sizeof(*desc), &dma,
1259 &dma_sz);
1260 if (unlikely(ret)) {
1261 dev_err(netcp->ndev_dev, "%s() failed to map desc\n", __func__);
1262 ret = -ENOMEM;
1263 goto out;
1264 }
1265 skb_tx_timestamp(skb);
1266 knav_queue_push(tx_pipe->dma_queue, dma, dma_sz, 0);
1267
1268 out:
1269 return ret;
1270 }
1271
1272 /* Submit the packet */
1273 static int netcp_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1274 {
1275 struct netcp_intf *netcp = netdev_priv(ndev);
1276 struct netcp_stats *tx_stats = &netcp->stats;
1277 int subqueue = skb_get_queue_mapping(skb);
1278 struct knav_dma_desc *desc;
1279 int desc_count, ret = 0;
1280
1281 if (unlikely(skb->len <= 0)) {
1282 dev_kfree_skb(skb);
1283 return NETDEV_TX_OK;
1284 }
1285
1286 if (unlikely(skb->len < NETCP_MIN_PACKET_SIZE)) {
1287 ret = skb_padto(skb, NETCP_MIN_PACKET_SIZE);
1288 if (ret < 0) {
1289 /* If we get here, the skb has already been dropped */
1290 dev_warn(netcp->ndev_dev, "padding failed (%d), packet dropped\n",
1291 ret);
1292 tx_stats->tx_dropped++;
1293 return ret;
1294 }
1295 skb->len = NETCP_MIN_PACKET_SIZE;
1296 }
1297
1298 desc = netcp_tx_map_skb(skb, netcp);
1299 if (unlikely(!desc)) {
1300 netif_stop_subqueue(ndev, subqueue);
1301 ret = -ENOBUFS;
1302 goto drop;
1303 }
1304
1305 ret = netcp_tx_submit_skb(netcp, skb, desc);
1306 if (ret)
1307 goto drop;
1308
1309 /* Check Tx pool count & stop subqueue if needed */
1310 desc_count = knav_pool_count(netcp->tx_pool);
1311 if (desc_count < netcp->tx_pause_threshold) {
1312 dev_dbg(netcp->ndev_dev, "pausing tx, count(%d)\n", desc_count);
1313 netif_stop_subqueue(ndev, subqueue);
1314 }
1315 return NETDEV_TX_OK;
1316
1317 drop:
1318 tx_stats->tx_dropped++;
1319 if (desc)
1320 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
1321 dev_kfree_skb(skb);
1322 return ret;
1323 }
1324
1325 int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe)
1326 {
1327 if (tx_pipe->dma_channel) {
1328 knav_dma_close_channel(tx_pipe->dma_channel);
1329 tx_pipe->dma_channel = NULL;
1330 }
1331 return 0;
1332 }
1333 EXPORT_SYMBOL_GPL(netcp_txpipe_close);
1334
1335 int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe)
1336 {
1337 struct device *dev = tx_pipe->netcp_device->device;
1338 struct knav_dma_cfg config;
1339 int ret = 0;
1340 u8 name[16];
1341
1342 memset(&config, 0, sizeof(config));
1343 config.direction = DMA_MEM_TO_DEV;
1344 config.u.tx.filt_einfo = false;
1345 config.u.tx.filt_pswords = false;
1346 config.u.tx.priority = DMA_PRIO_MED_L;
1347
1348 tx_pipe->dma_channel = knav_dma_open_channel(dev,
1349 tx_pipe->dma_chan_name, &config);
1350 if (IS_ERR(tx_pipe->dma_channel)) {
1351 dev_err(dev, "failed opening tx chan(%s)\n",
1352 tx_pipe->dma_chan_name);
1353 ret = PTR_ERR(tx_pipe->dma_channel);
1354 goto err;
1355 }
1356
1357 snprintf(name, sizeof(name), "tx-pipe-%s", dev_name(dev));
1358 tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id,
1359 KNAV_QUEUE_SHARED);
1360 if (IS_ERR(tx_pipe->dma_queue)) {
1361 dev_err(dev, "Could not open DMA queue for channel \"%s\": %d\n",
1362 name, ret);
1363 ret = PTR_ERR(tx_pipe->dma_queue);
1364 goto err;
1365 }
1366
1367 dev_dbg(dev, "opened tx pipe %s\n", name);
1368 return 0;
1369
1370 err:
1371 if (!IS_ERR_OR_NULL(tx_pipe->dma_channel))
1372 knav_dma_close_channel(tx_pipe->dma_channel);
1373 tx_pipe->dma_channel = NULL;
1374 return ret;
1375 }
1376 EXPORT_SYMBOL_GPL(netcp_txpipe_open);
1377
1378 int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,
1379 struct netcp_device *netcp_device,
1380 const char *dma_chan_name, unsigned int dma_queue_id)
1381 {
1382 memset(tx_pipe, 0, sizeof(*tx_pipe));
1383 tx_pipe->netcp_device = netcp_device;
1384 tx_pipe->dma_chan_name = dma_chan_name;
1385 tx_pipe->dma_queue_id = dma_queue_id;
1386 return 0;
1387 }
1388 EXPORT_SYMBOL_GPL(netcp_txpipe_init);
1389
1390 static struct netcp_addr *netcp_addr_find(struct netcp_intf *netcp,
1391 const u8 *addr,
1392 enum netcp_addr_type type)
1393 {
1394 struct netcp_addr *naddr;
1395
1396 list_for_each_entry(naddr, &netcp->addr_list, node) {
1397 if (naddr->type != type)
1398 continue;
1399 if (addr && memcmp(addr, naddr->addr, ETH_ALEN))
1400 continue;
1401 return naddr;
1402 }
1403
1404 return NULL;
1405 }
1406
1407 static struct netcp_addr *netcp_addr_add(struct netcp_intf *netcp,
1408 const u8 *addr,
1409 enum netcp_addr_type type)
1410 {
1411 struct netcp_addr *naddr;
1412
1413 naddr = devm_kmalloc(netcp->dev, sizeof(*naddr), GFP_ATOMIC);
1414 if (!naddr)
1415 return NULL;
1416
1417 naddr->type = type;
1418 naddr->flags = 0;
1419 naddr->netcp = netcp;
1420 if (addr)
1421 ether_addr_copy(naddr->addr, addr);
1422 else
1423 eth_zero_addr(naddr->addr);
1424 list_add_tail(&naddr->node, &netcp->addr_list);
1425
1426 return naddr;
1427 }
1428
1429 static void netcp_addr_del(struct netcp_intf *netcp, struct netcp_addr *naddr)
1430 {
1431 list_del(&naddr->node);
1432 devm_kfree(netcp->dev, naddr);
1433 }
1434
1435 static void netcp_addr_clear_mark(struct netcp_intf *netcp)
1436 {
1437 struct netcp_addr *naddr;
1438
1439 list_for_each_entry(naddr, &netcp->addr_list, node)
1440 naddr->flags = 0;
1441 }
1442
1443 static void netcp_addr_add_mark(struct netcp_intf *netcp, const u8 *addr,
1444 enum netcp_addr_type type)
1445 {
1446 struct netcp_addr *naddr;
1447
1448 naddr = netcp_addr_find(netcp, addr, type);
1449 if (naddr) {
1450 naddr->flags |= ADDR_VALID;
1451 return;
1452 }
1453
1454 naddr = netcp_addr_add(netcp, addr, type);
1455 if (!WARN_ON(!naddr))
1456 naddr->flags |= ADDR_NEW;
1457 }
1458
1459 static void netcp_addr_sweep_del(struct netcp_intf *netcp)
1460 {
1461 struct netcp_addr *naddr, *tmp;
1462 struct netcp_intf_modpriv *priv;
1463 struct netcp_module *module;
1464 int error;
1465
1466 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
1467 if (naddr->flags & (ADDR_VALID | ADDR_NEW))
1468 continue;
1469 dev_dbg(netcp->ndev_dev, "deleting address %pM, type %x\n",
1470 naddr->addr, naddr->type);
1471 for_each_module(netcp, priv) {
1472 module = priv->netcp_module;
1473 if (!module->del_addr)
1474 continue;
1475 error = module->del_addr(priv->module_priv,
1476 naddr);
1477 WARN_ON(error);
1478 }
1479 netcp_addr_del(netcp, naddr);
1480 }
1481 }
1482
1483 static void netcp_addr_sweep_add(struct netcp_intf *netcp)
1484 {
1485 struct netcp_addr *naddr, *tmp;
1486 struct netcp_intf_modpriv *priv;
1487 struct netcp_module *module;
1488 int error;
1489
1490 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
1491 if (!(naddr->flags & ADDR_NEW))
1492 continue;
1493 dev_dbg(netcp->ndev_dev, "adding address %pM, type %x\n",
1494 naddr->addr, naddr->type);
1495
1496 for_each_module(netcp, priv) {
1497 module = priv->netcp_module;
1498 if (!module->add_addr)
1499 continue;
1500 error = module->add_addr(priv->module_priv, naddr);
1501 WARN_ON(error);
1502 }
1503 }
1504 }
1505
1506 static int netcp_set_promiscuous(struct netcp_intf *netcp, bool promisc)
1507 {
1508 struct netcp_intf_modpriv *priv;
1509 struct netcp_module *module;
1510 int error;
1511
1512 for_each_module(netcp, priv) {
1513 module = priv->netcp_module;
1514 if (!module->set_rx_mode)
1515 continue;
1516
1517 error = module->set_rx_mode(priv->module_priv, promisc);
1518 if (error)
1519 return error;
1520 }
1521 return 0;
1522 }
1523
1524 static void netcp_set_rx_mode(struct net_device *ndev)
1525 {
1526 struct netcp_intf *netcp = netdev_priv(ndev);
1527 struct netdev_hw_addr *ndev_addr;
1528 bool promisc;
1529
1530 promisc = (ndev->flags & IFF_PROMISC ||
1531 ndev->flags & IFF_ALLMULTI ||
1532 netdev_mc_count(ndev) > NETCP_MAX_MCAST_ADDR);
1533
1534 spin_lock(&netcp->lock);
1535 /* first clear all marks */
1536 netcp_addr_clear_mark(netcp);
1537
1538 /* next add new entries, mark existing ones */
1539 netcp_addr_add_mark(netcp, ndev->broadcast, ADDR_BCAST);
1540 for_each_dev_addr(ndev, ndev_addr)
1541 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_DEV);
1542 netdev_for_each_uc_addr(ndev_addr, ndev)
1543 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_UCAST);
1544 netdev_for_each_mc_addr(ndev_addr, ndev)
1545 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_MCAST);
1546
1547 if (promisc)
1548 netcp_addr_add_mark(netcp, NULL, ADDR_ANY);
1549
1550 /* finally sweep and callout into modules */
1551 netcp_addr_sweep_del(netcp);
1552 netcp_addr_sweep_add(netcp);
1553 netcp_set_promiscuous(netcp, promisc);
1554 spin_unlock(&netcp->lock);
1555 }
1556
1557 static void netcp_free_navigator_resources(struct netcp_intf *netcp)
1558 {
1559 int i;
1560
1561 if (netcp->rx_channel) {
1562 knav_dma_close_channel(netcp->rx_channel);
1563 netcp->rx_channel = NULL;
1564 }
1565
1566 if (!IS_ERR_OR_NULL(netcp->rx_pool))
1567 netcp_rxpool_free(netcp);
1568
1569 if (!IS_ERR_OR_NULL(netcp->rx_queue)) {
1570 knav_queue_close(netcp->rx_queue);
1571 netcp->rx_queue = NULL;
1572 }
1573
1574 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
1575 !IS_ERR_OR_NULL(netcp->rx_fdq[i]) ; ++i) {
1576 knav_queue_close(netcp->rx_fdq[i]);
1577 netcp->rx_fdq[i] = NULL;
1578 }
1579
1580 if (!IS_ERR_OR_NULL(netcp->tx_compl_q)) {
1581 knav_queue_close(netcp->tx_compl_q);
1582 netcp->tx_compl_q = NULL;
1583 }
1584
1585 if (!IS_ERR_OR_NULL(netcp->tx_pool)) {
1586 knav_pool_destroy(netcp->tx_pool);
1587 netcp->tx_pool = NULL;
1588 }
1589 }
1590
1591 static int netcp_setup_navigator_resources(struct net_device *ndev)
1592 {
1593 struct netcp_intf *netcp = netdev_priv(ndev);
1594 struct knav_queue_notify_config notify_cfg;
1595 struct knav_dma_cfg config;
1596 u32 last_fdq = 0;
1597 u8 name[16];
1598 int ret;
1599 int i;
1600
1601 /* Create Rx/Tx descriptor pools */
1602 snprintf(name, sizeof(name), "rx-pool-%s", ndev->name);
1603 netcp->rx_pool = knav_pool_create(name, netcp->rx_pool_size,
1604 netcp->rx_pool_region_id);
1605 if (IS_ERR_OR_NULL(netcp->rx_pool)) {
1606 dev_err(netcp->ndev_dev, "Couldn't create rx pool\n");
1607 ret = PTR_ERR(netcp->rx_pool);
1608 goto fail;
1609 }
1610
1611 snprintf(name, sizeof(name), "tx-pool-%s", ndev->name);
1612 netcp->tx_pool = knav_pool_create(name, netcp->tx_pool_size,
1613 netcp->tx_pool_region_id);
1614 if (IS_ERR_OR_NULL(netcp->tx_pool)) {
1615 dev_err(netcp->ndev_dev, "Couldn't create tx pool\n");
1616 ret = PTR_ERR(netcp->tx_pool);
1617 goto fail;
1618 }
1619
1620 /* open Tx completion queue */
1621 snprintf(name, sizeof(name), "tx-compl-%s", ndev->name);
1622 netcp->tx_compl_q = knav_queue_open(name, netcp->tx_compl_qid, 0);
1623 if (IS_ERR(netcp->tx_compl_q)) {
1624 ret = PTR_ERR(netcp->tx_compl_q);
1625 goto fail;
1626 }
1627 netcp->tx_compl_qid = knav_queue_get_id(netcp->tx_compl_q);
1628
1629 /* Set notification for Tx completion */
1630 notify_cfg.fn = netcp_tx_notify;
1631 notify_cfg.fn_arg = netcp;
1632 ret = knav_queue_device_control(netcp->tx_compl_q,
1633 KNAV_QUEUE_SET_NOTIFIER,
1634 (unsigned long)&notify_cfg);
1635 if (ret)
1636 goto fail;
1637
1638 knav_queue_disable_notify(netcp->tx_compl_q);
1639
1640 /* open Rx completion queue */
1641 snprintf(name, sizeof(name), "rx-compl-%s", ndev->name);
1642 netcp->rx_queue = knav_queue_open(name, netcp->rx_queue_id, 0);
1643 if (IS_ERR(netcp->rx_queue)) {
1644 ret = PTR_ERR(netcp->rx_queue);
1645 goto fail;
1646 }
1647 netcp->rx_queue_id = knav_queue_get_id(netcp->rx_queue);
1648
1649 /* Set notification for Rx completion */
1650 notify_cfg.fn = netcp_rx_notify;
1651 notify_cfg.fn_arg = netcp;
1652 ret = knav_queue_device_control(netcp->rx_queue,
1653 KNAV_QUEUE_SET_NOTIFIER,
1654 (unsigned long)&notify_cfg);
1655 if (ret)
1656 goto fail;
1657
1658 knav_queue_disable_notify(netcp->rx_queue);
1659
1660 /* open Rx FDQs */
1661 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_queue_depths[i];
1662 ++i) {
1663 snprintf(name, sizeof(name), "rx-fdq-%s-%d", ndev->name, i);
1664 netcp->rx_fdq[i] = knav_queue_open(name, KNAV_QUEUE_GP, 0);
1665 if (IS_ERR(netcp->rx_fdq[i])) {
1666 ret = PTR_ERR(netcp->rx_fdq[i]);
1667 goto fail;
1668 }
1669 }
1670
1671 memset(&config, 0, sizeof(config));
1672 config.direction = DMA_DEV_TO_MEM;
1673 config.u.rx.einfo_present = true;
1674 config.u.rx.psinfo_present = true;
1675 config.u.rx.err_mode = DMA_DROP;
1676 config.u.rx.desc_type = DMA_DESC_HOST;
1677 config.u.rx.psinfo_at_sop = false;
1678 config.u.rx.sop_offset = NETCP_SOP_OFFSET;
1679 config.u.rx.dst_q = netcp->rx_queue_id;
1680 config.u.rx.thresh = DMA_THRESH_NONE;
1681
1682 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN; ++i) {
1683 if (netcp->rx_fdq[i])
1684 last_fdq = knav_queue_get_id(netcp->rx_fdq[i]);
1685 config.u.rx.fdq[i] = last_fdq;
1686 }
1687
1688 netcp->rx_channel = knav_dma_open_channel(netcp->netcp_device->device,
1689 netcp->dma_chan_name, &config);
1690 if (IS_ERR(netcp->rx_channel)) {
1691 dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n",
1692 netcp->dma_chan_name);
1693 ret = PTR_ERR(netcp->rx_channel);
1694 goto fail;
1695 }
1696
1697 dev_dbg(netcp->ndev_dev, "opened RX channel: %p\n", netcp->rx_channel);
1698 return 0;
1699
1700 fail:
1701 netcp_free_navigator_resources(netcp);
1702 return ret;
1703 }
1704
1705 /* Open the device */
1706 static int netcp_ndo_open(struct net_device *ndev)
1707 {
1708 struct netcp_intf *netcp = netdev_priv(ndev);
1709 struct netcp_intf_modpriv *intf_modpriv;
1710 struct netcp_module *module;
1711 int ret;
1712
1713 netif_carrier_off(ndev);
1714 ret = netcp_setup_navigator_resources(ndev);
1715 if (ret) {
1716 dev_err(netcp->ndev_dev, "Failed to setup navigator resources\n");
1717 goto fail;
1718 }
1719
1720 for_each_module(netcp, intf_modpriv) {
1721 module = intf_modpriv->netcp_module;
1722 if (module->open) {
1723 ret = module->open(intf_modpriv->module_priv, ndev);
1724 if (ret != 0) {
1725 dev_err(netcp->ndev_dev, "module open failed\n");
1726 goto fail_open;
1727 }
1728 }
1729 }
1730
1731 napi_enable(&netcp->rx_napi);
1732 napi_enable(&netcp->tx_napi);
1733 knav_queue_enable_notify(netcp->tx_compl_q);
1734 knav_queue_enable_notify(netcp->rx_queue);
1735 netcp_rxpool_refill(netcp);
1736 netif_tx_wake_all_queues(ndev);
1737 dev_dbg(netcp->ndev_dev, "netcp device %s opened\n", ndev->name);
1738 return 0;
1739
1740 fail_open:
1741 for_each_module(netcp, intf_modpriv) {
1742 module = intf_modpriv->netcp_module;
1743 if (module->close)
1744 module->close(intf_modpriv->module_priv, ndev);
1745 }
1746
1747 fail:
1748 netcp_free_navigator_resources(netcp);
1749 return ret;
1750 }
1751
1752 /* Close the device */
1753 static int netcp_ndo_stop(struct net_device *ndev)
1754 {
1755 struct netcp_intf *netcp = netdev_priv(ndev);
1756 struct netcp_intf_modpriv *intf_modpriv;
1757 struct netcp_module *module;
1758 int err = 0;
1759
1760 netif_tx_stop_all_queues(ndev);
1761 netif_carrier_off(ndev);
1762 netcp_addr_clear_mark(netcp);
1763 netcp_addr_sweep_del(netcp);
1764 knav_queue_disable_notify(netcp->rx_queue);
1765 knav_queue_disable_notify(netcp->tx_compl_q);
1766 napi_disable(&netcp->rx_napi);
1767 napi_disable(&netcp->tx_napi);
1768
1769 for_each_module(netcp, intf_modpriv) {
1770 module = intf_modpriv->netcp_module;
1771 if (module->close) {
1772 err = module->close(intf_modpriv->module_priv, ndev);
1773 if (err != 0)
1774 dev_err(netcp->ndev_dev, "Close failed\n");
1775 }
1776 }
1777
1778 /* Recycle Rx descriptors from completion queue */
1779 netcp_empty_rx_queue(netcp);
1780
1781 /* Recycle Tx descriptors from completion queue */
1782 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
1783
1784 if (knav_pool_count(netcp->tx_pool) != netcp->tx_pool_size)
1785 dev_err(netcp->ndev_dev, "Lost (%d) Tx descs\n",
1786 netcp->tx_pool_size - knav_pool_count(netcp->tx_pool));
1787
1788 netcp_free_navigator_resources(netcp);
1789 dev_dbg(netcp->ndev_dev, "netcp device %s stopped\n", ndev->name);
1790 return 0;
1791 }
1792
1793 static int netcp_ndo_ioctl(struct net_device *ndev,
1794 struct ifreq *req, int cmd)
1795 {
1796 struct netcp_intf *netcp = netdev_priv(ndev);
1797 struct netcp_intf_modpriv *intf_modpriv;
1798 struct netcp_module *module;
1799 int ret = -1, err = -EOPNOTSUPP;
1800
1801 if (!netif_running(ndev))
1802 return -EINVAL;
1803
1804 for_each_module(netcp, intf_modpriv) {
1805 module = intf_modpriv->netcp_module;
1806 if (!module->ioctl)
1807 continue;
1808
1809 err = module->ioctl(intf_modpriv->module_priv, req, cmd);
1810 if ((err < 0) && (err != -EOPNOTSUPP)) {
1811 ret = err;
1812 goto out;
1813 }
1814 if (err == 0)
1815 ret = err;
1816 }
1817
1818 out:
1819 return (ret == 0) ? 0 : err;
1820 }
1821
1822 static void netcp_ndo_tx_timeout(struct net_device *ndev)
1823 {
1824 struct netcp_intf *netcp = netdev_priv(ndev);
1825 unsigned int descs = knav_pool_count(netcp->tx_pool);
1826
1827 dev_err(netcp->ndev_dev, "transmit timed out tx descs(%d)\n", descs);
1828 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
1829 netif_trans_update(ndev);
1830 netif_tx_wake_all_queues(ndev);
1831 }
1832
1833 static int netcp_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid)
1834 {
1835 struct netcp_intf *netcp = netdev_priv(ndev);
1836 struct netcp_intf_modpriv *intf_modpriv;
1837 struct netcp_module *module;
1838 unsigned long flags;
1839 int err = 0;
1840
1841 dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid);
1842
1843 spin_lock_irqsave(&netcp->lock, flags);
1844 for_each_module(netcp, intf_modpriv) {
1845 module = intf_modpriv->netcp_module;
1846 if ((module->add_vid) && (vid != 0)) {
1847 err = module->add_vid(intf_modpriv->module_priv, vid);
1848 if (err != 0) {
1849 dev_err(netcp->ndev_dev, "Could not add vlan id = %d\n",
1850 vid);
1851 break;
1852 }
1853 }
1854 }
1855 spin_unlock_irqrestore(&netcp->lock, flags);
1856
1857 return err;
1858 }
1859
1860 static int netcp_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid)
1861 {
1862 struct netcp_intf *netcp = netdev_priv(ndev);
1863 struct netcp_intf_modpriv *intf_modpriv;
1864 struct netcp_module *module;
1865 unsigned long flags;
1866 int err = 0;
1867
1868 dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid);
1869
1870 spin_lock_irqsave(&netcp->lock, flags);
1871 for_each_module(netcp, intf_modpriv) {
1872 module = intf_modpriv->netcp_module;
1873 if (module->del_vid) {
1874 err = module->del_vid(intf_modpriv->module_priv, vid);
1875 if (err != 0) {
1876 dev_err(netcp->ndev_dev, "Could not delete vlan id = %d\n",
1877 vid);
1878 break;
1879 }
1880 }
1881 }
1882 spin_unlock_irqrestore(&netcp->lock, flags);
1883 return err;
1884 }
1885
1886 static int netcp_setup_tc(struct net_device *dev, enum tc_setup_type type,
1887 void *type_data)
1888 {
1889 struct tc_mqprio_qopt *mqprio = type_data;
1890 u8 num_tc;
1891 int i;
1892
1893 /* setup tc must be called under rtnl lock */
1894 ASSERT_RTNL();
1895
1896 if (type != TC_SETUP_QDISC_MQPRIO)
1897 return -EOPNOTSUPP;
1898
1899 mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
1900 num_tc = mqprio->num_tc;
1901
1902 /* Sanity-check the number of traffic classes requested */
1903 if ((dev->real_num_tx_queues <= 1) ||
1904 (dev->real_num_tx_queues < num_tc))
1905 return -EINVAL;
1906
1907 /* Configure traffic class to queue mappings */
1908 if (num_tc) {
1909 netdev_set_num_tc(dev, num_tc);
1910 for (i = 0; i < num_tc; i++)
1911 netdev_set_tc_queue(dev, i, 1, i);
1912 } else {
1913 netdev_reset_tc(dev);
1914 }
1915
1916 return 0;
1917 }
1918
1919 static void
1920 netcp_get_stats(struct net_device *ndev, struct rtnl_link_stats64 *stats)
1921 {
1922 struct netcp_intf *netcp = netdev_priv(ndev);
1923 struct netcp_stats *p = &netcp->stats;
1924 u64 rxpackets, rxbytes, txpackets, txbytes;
1925 unsigned int start;
1926
1927 do {
1928 start = u64_stats_fetch_begin_irq(&p->syncp_rx);
1929 rxpackets = p->rx_packets;
1930 rxbytes = p->rx_bytes;
1931 } while (u64_stats_fetch_retry_irq(&p->syncp_rx, start));
1932
1933 do {
1934 start = u64_stats_fetch_begin_irq(&p->syncp_tx);
1935 txpackets = p->tx_packets;
1936 txbytes = p->tx_bytes;
1937 } while (u64_stats_fetch_retry_irq(&p->syncp_tx, start));
1938
1939 stats->rx_packets = rxpackets;
1940 stats->rx_bytes = rxbytes;
1941 stats->tx_packets = txpackets;
1942 stats->tx_bytes = txbytes;
1943
1944 /* The following are stored as 32 bit */
1945 stats->rx_errors = p->rx_errors;
1946 stats->rx_dropped = p->rx_dropped;
1947 stats->tx_dropped = p->tx_dropped;
1948 }
1949
1950 static const struct net_device_ops netcp_netdev_ops = {
1951 .ndo_open = netcp_ndo_open,
1952 .ndo_stop = netcp_ndo_stop,
1953 .ndo_start_xmit = netcp_ndo_start_xmit,
1954 .ndo_set_rx_mode = netcp_set_rx_mode,
1955 .ndo_do_ioctl = netcp_ndo_ioctl,
1956 .ndo_get_stats64 = netcp_get_stats,
1957 .ndo_set_mac_address = eth_mac_addr,
1958 .ndo_validate_addr = eth_validate_addr,
1959 .ndo_vlan_rx_add_vid = netcp_rx_add_vid,
1960 .ndo_vlan_rx_kill_vid = netcp_rx_kill_vid,
1961 .ndo_tx_timeout = netcp_ndo_tx_timeout,
1962 .ndo_select_queue = dev_pick_tx_zero,
1963 .ndo_setup_tc = netcp_setup_tc,
1964 };
1965
1966 static int netcp_create_interface(struct netcp_device *netcp_device,
1967 struct device_node *node_interface)
1968 {
1969 struct device *dev = netcp_device->device;
1970 struct device_node *node = dev->of_node;
1971 struct netcp_intf *netcp;
1972 struct net_device *ndev;
1973 resource_size_t size;
1974 struct resource res;
1975 void __iomem *efuse = NULL;
1976 u32 efuse_mac = 0;
1977 const void *mac_addr;
1978 u8 efuse_mac_addr[6];
1979 u32 temp[2];
1980 int ret = 0;
1981
1982 ndev = alloc_etherdev_mqs(sizeof(*netcp), 1, 1);
1983 if (!ndev) {
1984 dev_err(dev, "Error allocating netdev\n");
1985 return -ENOMEM;
1986 }
1987
1988 ndev->features |= NETIF_F_SG;
1989 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1990 ndev->hw_features = ndev->features;
1991 ndev->vlan_features |= NETIF_F_SG;
1992
1993 /* MTU range: 68 - 9486 */
1994 ndev->min_mtu = ETH_MIN_MTU;
1995 ndev->max_mtu = NETCP_MAX_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
1996
1997 netcp = netdev_priv(ndev);
1998 spin_lock_init(&netcp->lock);
1999 INIT_LIST_HEAD(&netcp->module_head);
2000 INIT_LIST_HEAD(&netcp->txhook_list_head);
2001 INIT_LIST_HEAD(&netcp->rxhook_list_head);
2002 INIT_LIST_HEAD(&netcp->addr_list);
2003 u64_stats_init(&netcp->stats.syncp_rx);
2004 u64_stats_init(&netcp->stats.syncp_tx);
2005 netcp->netcp_device = netcp_device;
2006 netcp->dev = netcp_device->device;
2007 netcp->ndev = ndev;
2008 netcp->ndev_dev = &ndev->dev;
2009 netcp->msg_enable = netif_msg_init(netcp_debug_level, NETCP_DEBUG);
2010 netcp->tx_pause_threshold = MAX_SKB_FRAGS;
2011 netcp->tx_resume_threshold = netcp->tx_pause_threshold;
2012 netcp->node_interface = node_interface;
2013
2014 ret = of_property_read_u32(node_interface, "efuse-mac", &efuse_mac);
2015 if (efuse_mac) {
2016 if (of_address_to_resource(node, NETCP_EFUSE_REG_INDEX, &res)) {
2017 dev_err(dev, "could not find efuse-mac reg resource\n");
2018 ret = -ENODEV;
2019 goto quit;
2020 }
2021 size = resource_size(&res);
2022
2023 if (!devm_request_mem_region(dev, res.start, size,
2024 dev_name(dev))) {
2025 dev_err(dev, "could not reserve resource\n");
2026 ret = -ENOMEM;
2027 goto quit;
2028 }
2029
2030 efuse = devm_ioremap_nocache(dev, res.start, size);
2031 if (!efuse) {
2032 dev_err(dev, "could not map resource\n");
2033 devm_release_mem_region(dev, res.start, size);
2034 ret = -ENOMEM;
2035 goto quit;
2036 }
2037
2038 emac_arch_get_mac_addr(efuse_mac_addr, efuse, efuse_mac);
2039 if (is_valid_ether_addr(efuse_mac_addr))
2040 ether_addr_copy(ndev->dev_addr, efuse_mac_addr);
2041 else
2042 eth_random_addr(ndev->dev_addr);
2043
2044 devm_iounmap(dev, efuse);
2045 devm_release_mem_region(dev, res.start, size);
2046 } else {
2047 mac_addr = of_get_mac_address(node_interface);
2048 if (mac_addr)
2049 ether_addr_copy(ndev->dev_addr, mac_addr);
2050 else
2051 eth_random_addr(ndev->dev_addr);
2052 }
2053
2054 ret = of_property_read_string(node_interface, "rx-channel",
2055 &netcp->dma_chan_name);
2056 if (ret < 0) {
2057 dev_err(dev, "missing \"rx-channel\" parameter\n");
2058 ret = -ENODEV;
2059 goto quit;
2060 }
2061
2062 ret = of_property_read_u32(node_interface, "rx-queue",
2063 &netcp->rx_queue_id);
2064 if (ret < 0) {
2065 dev_warn(dev, "missing \"rx-queue\" parameter\n");
2066 netcp->rx_queue_id = KNAV_QUEUE_QPEND;
2067 }
2068
2069 ret = of_property_read_u32_array(node_interface, "rx-queue-depth",
2070 netcp->rx_queue_depths,
2071 KNAV_DMA_FDQ_PER_CHAN);
2072 if (ret < 0) {
2073 dev_err(dev, "missing \"rx-queue-depth\" parameter\n");
2074 netcp->rx_queue_depths[0] = 128;
2075 }
2076
2077 ret = of_property_read_u32_array(node_interface, "rx-pool", temp, 2);
2078 if (ret < 0) {
2079 dev_err(dev, "missing \"rx-pool\" parameter\n");
2080 ret = -ENODEV;
2081 goto quit;
2082 }
2083 netcp->rx_pool_size = temp[0];
2084 netcp->rx_pool_region_id = temp[1];
2085
2086 ret = of_property_read_u32_array(node_interface, "tx-pool", temp, 2);
2087 if (ret < 0) {
2088 dev_err(dev, "missing \"tx-pool\" parameter\n");
2089 ret = -ENODEV;
2090 goto quit;
2091 }
2092 netcp->tx_pool_size = temp[0];
2093 netcp->tx_pool_region_id = temp[1];
2094
2095 if (netcp->tx_pool_size < MAX_SKB_FRAGS) {
2096 dev_err(dev, "tx-pool size too small, must be atleast(%ld)\n",
2097 MAX_SKB_FRAGS);
2098 ret = -ENODEV;
2099 goto quit;
2100 }
2101
2102 ret = of_property_read_u32(node_interface, "tx-completion-queue",
2103 &netcp->tx_compl_qid);
2104 if (ret < 0) {
2105 dev_warn(dev, "missing \"tx-completion-queue\" parameter\n");
2106 netcp->tx_compl_qid = KNAV_QUEUE_QPEND;
2107 }
2108
2109 /* NAPI register */
2110 netif_napi_add(ndev, &netcp->rx_napi, netcp_rx_poll, NETCP_NAPI_WEIGHT);
2111 netif_tx_napi_add(ndev, &netcp->tx_napi, netcp_tx_poll, NETCP_NAPI_WEIGHT);
2112
2113 /* Register the network device */
2114 ndev->dev_id = 0;
2115 ndev->watchdog_timeo = NETCP_TX_TIMEOUT;
2116 ndev->netdev_ops = &netcp_netdev_ops;
2117 SET_NETDEV_DEV(ndev, dev);
2118
2119 list_add_tail(&netcp->interface_list, &netcp_device->interface_head);
2120 return 0;
2121
2122 quit:
2123 free_netdev(ndev);
2124 return ret;
2125 }
2126
2127 static void netcp_delete_interface(struct netcp_device *netcp_device,
2128 struct net_device *ndev)
2129 {
2130 struct netcp_intf_modpriv *intf_modpriv, *tmp;
2131 struct netcp_intf *netcp = netdev_priv(ndev);
2132 struct netcp_module *module;
2133
2134 dev_dbg(netcp_device->device, "Removing interface \"%s\"\n",
2135 ndev->name);
2136
2137 /* Notify each of the modules that the interface is going away */
2138 list_for_each_entry_safe(intf_modpriv, tmp, &netcp->module_head,
2139 intf_list) {
2140 module = intf_modpriv->netcp_module;
2141 dev_dbg(netcp_device->device, "Releasing module \"%s\"\n",
2142 module->name);
2143 if (module->release)
2144 module->release(intf_modpriv->module_priv);
2145 list_del(&intf_modpriv->intf_list);
2146 }
2147 WARN(!list_empty(&netcp->module_head), "%s interface module list is not empty!\n",
2148 ndev->name);
2149
2150 list_del(&netcp->interface_list);
2151
2152 of_node_put(netcp->node_interface);
2153 unregister_netdev(ndev);
2154 free_netdev(ndev);
2155 }
2156
2157 static int netcp_probe(struct platform_device *pdev)
2158 {
2159 struct device_node *node = pdev->dev.of_node;
2160 struct netcp_intf *netcp_intf, *netcp_tmp;
2161 struct device_node *child, *interfaces;
2162 struct netcp_device *netcp_device;
2163 struct device *dev = &pdev->dev;
2164 struct netcp_module *module;
2165 int ret;
2166
2167 if (!knav_dma_device_ready() ||
2168 !knav_qmss_device_ready())
2169 return -EPROBE_DEFER;
2170
2171 if (!node) {
2172 dev_err(dev, "could not find device info\n");
2173 return -ENODEV;
2174 }
2175
2176 /* Allocate a new NETCP device instance */
2177 netcp_device = devm_kzalloc(dev, sizeof(*netcp_device), GFP_KERNEL);
2178 if (!netcp_device)
2179 return -ENOMEM;
2180
2181 pm_runtime_enable(&pdev->dev);
2182 ret = pm_runtime_get_sync(&pdev->dev);
2183 if (ret < 0) {
2184 dev_err(dev, "Failed to enable NETCP power-domain\n");
2185 pm_runtime_disable(&pdev->dev);
2186 return ret;
2187 }
2188
2189 /* Initialize the NETCP device instance */
2190 INIT_LIST_HEAD(&netcp_device->interface_head);
2191 INIT_LIST_HEAD(&netcp_device->modpriv_head);
2192 netcp_device->device = dev;
2193 platform_set_drvdata(pdev, netcp_device);
2194
2195 /* create interfaces */
2196 interfaces = of_get_child_by_name(node, "netcp-interfaces");
2197 if (!interfaces) {
2198 dev_err(dev, "could not find netcp-interfaces node\n");
2199 ret = -ENODEV;
2200 goto probe_quit;
2201 }
2202
2203 for_each_available_child_of_node(interfaces, child) {
2204 ret = netcp_create_interface(netcp_device, child);
2205 if (ret) {
2206 dev_err(dev, "could not create interface(%pOFn)\n",
2207 child);
2208 goto probe_quit_interface;
2209 }
2210 }
2211
2212 of_node_put(interfaces);
2213
2214 /* Add the device instance to the list */
2215 list_add_tail(&netcp_device->device_list, &netcp_devices);
2216
2217 /* Probe & attach any modules already registered */
2218 mutex_lock(&netcp_modules_lock);
2219 for_each_netcp_module(module) {
2220 ret = netcp_module_probe(netcp_device, module);
2221 if (ret < 0)
2222 dev_err(dev, "module(%s) probe failed\n", module->name);
2223 }
2224 mutex_unlock(&netcp_modules_lock);
2225 return 0;
2226
2227 probe_quit_interface:
2228 list_for_each_entry_safe(netcp_intf, netcp_tmp,
2229 &netcp_device->interface_head,
2230 interface_list) {
2231 netcp_delete_interface(netcp_device, netcp_intf->ndev);
2232 }
2233
2234 of_node_put(interfaces);
2235
2236 probe_quit:
2237 pm_runtime_put_sync(&pdev->dev);
2238 pm_runtime_disable(&pdev->dev);
2239 platform_set_drvdata(pdev, NULL);
2240 return ret;
2241 }
2242
2243 static int netcp_remove(struct platform_device *pdev)
2244 {
2245 struct netcp_device *netcp_device = platform_get_drvdata(pdev);
2246 struct netcp_intf *netcp_intf, *netcp_tmp;
2247 struct netcp_inst_modpriv *inst_modpriv, *tmp;
2248 struct netcp_module *module;
2249
2250 list_for_each_entry_safe(inst_modpriv, tmp, &netcp_device->modpriv_head,
2251 inst_list) {
2252 module = inst_modpriv->netcp_module;
2253 dev_dbg(&pdev->dev, "Removing module \"%s\"\n", module->name);
2254 module->remove(netcp_device, inst_modpriv->module_priv);
2255 list_del(&inst_modpriv->inst_list);
2256 }
2257
2258 /* now that all modules are removed, clean up the interfaces */
2259 list_for_each_entry_safe(netcp_intf, netcp_tmp,
2260 &netcp_device->interface_head,
2261 interface_list) {
2262 netcp_delete_interface(netcp_device, netcp_intf->ndev);
2263 }
2264
2265 WARN(!list_empty(&netcp_device->interface_head),
2266 "%s interface list not empty!\n", pdev->name);
2267
2268 pm_runtime_put_sync(&pdev->dev);
2269 pm_runtime_disable(&pdev->dev);
2270 platform_set_drvdata(pdev, NULL);
2271 return 0;
2272 }
2273
2274 static const struct of_device_id of_match[] = {
2275 { .compatible = "ti,netcp-1.0", },
2276 {},
2277 };
2278 MODULE_DEVICE_TABLE(of, of_match);
2279
2280 static struct platform_driver netcp_driver = {
2281 .driver = {
2282 .name = "netcp-1.0",
2283 .of_match_table = of_match,
2284 },
2285 .probe = netcp_probe,
2286 .remove = netcp_remove,
2287 };
2288 module_platform_driver(netcp_driver);
2289
2290 MODULE_LICENSE("GPL v2");
2291 MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs");
2292 MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com");
Linux with added FPC-III support