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net: netcp: check for interface handle in netcp_module_probe()
[deliverable/linux.git] / drivers / net / ethernet / ti / netcp_core.c
CommitLineData
84640e27
KM		 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)
866b8b18 37#define NETCP_PACKET_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN)
84640e27
KM		 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
71382bc0
WK		 55#define NETCP_EFUSE_ADDR_SWAP 2
56
84640e27
KM		 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
103static LIST_HEAD(netcp_devices);
104static LIST_HEAD(netcp_modules);
105static DEFINE_MUTEX(netcp_modules_lock);
106
107static int netcp_debug_level = -1;
108module_param(netcp_debug_level, int, 0);
109MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");
110
111/* Helper functions - Get/Set */
112static void get_pkt_info(u32 *buff, u32 *buff_len, u32 *ndesc,
113 struct knav_dma_desc *desc)
114{
115 *buff_len = desc->buff_len;
116 *buff = desc->buff;
117 *ndesc = desc->next_desc;
118}
119
120static void get_pad_info(u32 *pad0, u32 *pad1, struct knav_dma_desc *desc)
121{
122 *pad0 = desc->pad[0];
123 *pad1 = desc->pad[1];
124}
125
126static void get_org_pkt_info(u32 *buff, u32 *buff_len,
127 struct knav_dma_desc *desc)
128{
129 *buff = desc->orig_buff;
130 *buff_len = desc->orig_len;
131}
132
133static void get_words(u32 *words, int num_words, u32 *desc)
134{
135 int i;
136
137 for (i = 0; i < num_words; i++)
138 words[i] = desc[i];
139}
140
141static void set_pkt_info(u32 buff, u32 buff_len, u32 ndesc,
142 struct knav_dma_desc *desc)
143{
144 desc->buff_len = buff_len;
145 desc->buff = buff;
146 desc->next_desc = ndesc;
147}
148
149static void set_desc_info(u32 desc_info, u32 pkt_info,
150 struct knav_dma_desc *desc)
151{
152 desc->desc_info = desc_info;
153 desc->packet_info = pkt_info;
154}
155
156static void set_pad_info(u32 pad0, u32 pad1, struct knav_dma_desc *desc)
157{
158 desc->pad[0] = pad0;
159 desc->pad[1] = pad1;
160}
161
162static void set_org_pkt_info(u32 buff, u32 buff_len,
163 struct knav_dma_desc *desc)
164{
165 desc->orig_buff = buff;
166 desc->orig_len = buff_len;
167}
168
169static void set_words(u32 *words, int num_words, u32 *desc)
170{
171 int i;
172
173 for (i = 0; i < num_words; i++)
174 desc[i] = words[i];
175}
176
177/* Read the e-fuse value as 32 bit values to be endian independent */
71382bc0 178static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac, u32 swap)
84640e27
KM		 179{
180 unsigned int addr0, addr1;
181
182 addr1 = readl(efuse_mac + 4);
183 addr0 = readl(efuse_mac);
184
71382bc0
WK		 185 switch (swap) {
186 case NETCP_EFUSE_ADDR_SWAP:
187 addr0 = addr1;
188 addr1 = readl(efuse_mac);
189 break;
190 default:
191 break;
192 }
193
84640e27
KM		 194 x[0] = (addr1 & 0x0000ff00) >> 8;
195 x[1] = addr1 & 0x000000ff;
196 x[2] = (addr0 & 0xff000000) >> 24;
197 x[3] = (addr0 & 0x00ff0000) >> 16;
198 x[4] = (addr0 & 0x0000ff00) >> 8;
199 x[5] = addr0 & 0x000000ff;
200
201 return 0;
202}
203
204static const char *netcp_node_name(struct device_node *node)
205{
206 const char *name;
207
208 if (of_property_read_string(node, "label", &name) < 0)
209 name = node->name;
210 if (!name)
211 name = "unknown";
212 return name;
213}
214
215/* Module management routines */
216static int netcp_register_interface(struct netcp_intf *netcp)
217{
218 int ret;
219
220 ret = register_netdev(netcp->ndev);
221 if (!ret)
222 netcp->netdev_registered = true;
223 return ret;
224}
225
226static int netcp_module_probe(struct netcp_device *netcp_device,
227 struct netcp_module *module)
228{
229 struct device *dev = netcp_device->device;
230 struct device_node *devices, *interface, *node = dev->of_node;
231 struct device_node *child;
232 struct netcp_inst_modpriv *inst_modpriv;
233 struct netcp_intf *netcp_intf;
234 struct netcp_module *tmp;
235 bool primary_module_registered = false;
236 int ret;
237
238 /* Find this module in the sub-tree for this device */
239 devices = of_get_child_by_name(node, "netcp-devices");
240 if (!devices) {
241 dev_err(dev, "could not find netcp-devices node\n");
242 return NETCP_MOD_PROBE_SKIPPED;
243 }
244
245 for_each_available_child_of_node(devices, child) {
246 const char *name = netcp_node_name(child);
247
248 if (!strcasecmp(module->name, name))
249 break;
250 }
251
252 of_node_put(devices);
253 /* If module not used for this device, skip it */
254 if (!child) {
255 dev_warn(dev, "module(%s) not used for device\n", module->name);
256 return NETCP_MOD_PROBE_SKIPPED;
257 }
258
259 inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL);
260 if (!inst_modpriv) {
261 of_node_put(child);
262 return -ENOMEM;
263 }
264
265 inst_modpriv->netcp_device = netcp_device;
266 inst_modpriv->netcp_module = module;
267 list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head);
268
269 ret = module->probe(netcp_device, dev, child,
270 &inst_modpriv->module_priv);
271 of_node_put(child);
272 if (ret) {
273 dev_err(dev, "Probe of module(%s) failed with %d\n",
274 module->name, ret);
275 list_del(&inst_modpriv->inst_list);
276 devm_kfree(dev, inst_modpriv);
277 return NETCP_MOD_PROBE_FAILED;
278 }
279
280 /* Attach modules only if the primary module is probed */
281 for_each_netcp_module(tmp) {
282 if (tmp->primary)
283 primary_module_registered = true;
284 }
285
286 if (!primary_module_registered)
287 return 0;
288
289 /* Attach module to interfaces */
290 list_for_each_entry(netcp_intf, &netcp_device->interface_head,
291 interface_list) {
292 struct netcp_intf_modpriv *intf_modpriv;
293
84640e27
KM		 294 intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv),
295 GFP_KERNEL);
296 if (!intf_modpriv)
297 return -ENOMEM;
298
299 interface = of_parse_phandle(netcp_intf->node_interface,
300 module->name, 0);
301
915c5857
KM		 302 if (!interface) {
303 devm_kfree(dev, intf_modpriv);
304 continue;
305 }
306
84640e27
KM		 307 intf_modpriv->netcp_priv = netcp_intf;
308 intf_modpriv->netcp_module = module;
309 list_add_tail(&intf_modpriv->intf_list,
310 &netcp_intf->module_head);
311
312 ret = module->attach(inst_modpriv->module_priv,
313 netcp_intf->ndev, interface,
314 &intf_modpriv->module_priv);
315 of_node_put(interface);
316 if (ret) {
317 dev_dbg(dev, "Attach of module %s declined with %d\n",
318 module->name, ret);
319 list_del(&intf_modpriv->intf_list);
320 devm_kfree(dev, intf_modpriv);
321 continue;
322 }
323 }
736532a0
KM		 324
325 /* Now register the interface with netdev */
326 list_for_each_entry(netcp_intf,
327 &netcp_device->interface_head,
328 interface_list) {
329 /* If interface not registered then register now */
330 if (!netcp_intf->netdev_registered) {
331 ret = netcp_register_interface(netcp_intf);
332 if (ret)
333 return -ENODEV;
334 }
335 }
84640e27
KM		 336 return 0;
337}
338
339int netcp_register_module(struct netcp_module *module)
340{
341 struct netcp_device *netcp_device;
342 struct netcp_module *tmp;
343 int ret;
344
345 if (!module->name) {
346 WARN(1, "error registering netcp module: no name\n");
347 return -EINVAL;
348 }
349
350 if (!module->probe) {
351 WARN(1, "error registering netcp module: no probe\n");
352 return -EINVAL;
353 }
354
355 mutex_lock(&netcp_modules_lock);
356
357 for_each_netcp_module(tmp) {
358 if (!strcasecmp(tmp->name, module->name)) {
359 mutex_unlock(&netcp_modules_lock);
360 return -EEXIST;
361 }
362 }
363 list_add_tail(&module->module_list, &netcp_modules);
364
365 list_for_each_entry(netcp_device, &netcp_devices, device_list) {
366 ret = netcp_module_probe(netcp_device, module);
367 if (ret < 0)
368 goto fail;
369 }
370
371 mutex_unlock(&netcp_modules_lock);
372 return 0;
373
374fail:
375 mutex_unlock(&netcp_modules_lock);
376 netcp_unregister_module(module);
377 return ret;
378}
58c11b5f 379EXPORT_SYMBOL_GPL(netcp_register_module);
84640e27
KM		 380
381static void netcp_release_module(struct netcp_device *netcp_device,
382 struct netcp_module *module)
383{
384 struct netcp_inst_modpriv *inst_modpriv, *inst_tmp;
385 struct netcp_intf *netcp_intf, *netcp_tmp;
386 struct device *dev = netcp_device->device;
387
388 /* Release the module from each interface */
389 list_for_each_entry_safe(netcp_intf, netcp_tmp,
390 &netcp_device->interface_head,
391 interface_list) {
392 struct netcp_intf_modpriv *intf_modpriv, *intf_tmp;
393
394 list_for_each_entry_safe(intf_modpriv, intf_tmp,
395 &netcp_intf->module_head,
396 intf_list) {
397 if (intf_modpriv->netcp_module == module) {
398 module->release(intf_modpriv->module_priv);
399 list_del(&intf_modpriv->intf_list);
400 devm_kfree(dev, intf_modpriv);
401 break;
402 }
403 }
404 }
405
406 /* Remove the module from each instance */
407 list_for_each_entry_safe(inst_modpriv, inst_tmp,
408 &netcp_device->modpriv_head, inst_list) {
409 if (inst_modpriv->netcp_module == module) {
410 module->remove(netcp_device,
411 inst_modpriv->module_priv);
412 list_del(&inst_modpriv->inst_list);
413 devm_kfree(dev, inst_modpriv);
414 break;
415 }
416 }
417}
418
419void netcp_unregister_module(struct netcp_module *module)
420{
421 struct netcp_device *netcp_device;
422 struct netcp_module *module_tmp;
423
424 mutex_lock(&netcp_modules_lock);
425
426 list_for_each_entry(netcp_device, &netcp_devices, device_list) {
427 netcp_release_module(netcp_device, module);
428 }
429
430 /* Remove the module from the module list */
431 for_each_netcp_module(module_tmp) {
432 if (module == module_tmp) {
433 list_del(&module->module_list);
434 break;
435 }
436 }
437
438 mutex_unlock(&netcp_modules_lock);
439}
58c11b5f 440EXPORT_SYMBOL_GPL(netcp_unregister_module);
84640e27
KM		 441
442void *netcp_module_get_intf_data(struct netcp_module *module,
443 struct netcp_intf *intf)
444{
445 struct netcp_intf_modpriv *intf_modpriv;
446
447 list_for_each_entry(intf_modpriv, &intf->module_head, intf_list)
448 if (intf_modpriv->netcp_module == module)
449 return intf_modpriv->module_priv;
450 return NULL;
451}
58c11b5f 452EXPORT_SYMBOL_GPL(netcp_module_get_intf_data);
84640e27
KM		 453
454/* Module TX and RX Hook management */
455struct netcp_hook_list {
456 struct list_head list;
457 netcp_hook_rtn *hook_rtn;
458 void *hook_data;
459 int order;
460};
461
462int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
463 netcp_hook_rtn *hook_rtn, void *hook_data)
464{
465 struct netcp_hook_list *entry;
466 struct netcp_hook_list *next;
467 unsigned long flags;
468
469 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
470 if (!entry)
471 return -ENOMEM;
472
473 entry->hook_rtn = hook_rtn;
474 entry->hook_data = hook_data;
475 entry->order = order;
476
477 spin_lock_irqsave(&netcp_priv->lock, flags);
478 list_for_each_entry(next, &netcp_priv->txhook_list_head, list) {
479 if (next->order > order)
480 break;
481 }
482 __list_add(&entry->list, next->list.prev, &next->list);
483 spin_unlock_irqrestore(&netcp_priv->lock, flags);
484
485 return 0;
486}
58c11b5f 487EXPORT_SYMBOL_GPL(netcp_register_txhook);
84640e27
KM		 488
489int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,
490 netcp_hook_rtn *hook_rtn, void *hook_data)
491{
492 struct netcp_hook_list *next, *n;
493 unsigned long flags;
494
495 spin_lock_irqsave(&netcp_priv->lock, flags);
496 list_for_each_entry_safe(next, n, &netcp_priv->txhook_list_head, list) {
497 if ((next->order == order) &&
498 (next->hook_rtn == hook_rtn) &&
499 (next->hook_data == hook_data)) {
500 list_del(&next->list);
501 spin_unlock_irqrestore(&netcp_priv->lock, flags);
502 devm_kfree(netcp_priv->dev, next);
503 return 0;
504 }
505 }
506 spin_unlock_irqrestore(&netcp_priv->lock, flags);
507 return -ENOENT;
508}
58c11b5f 509EXPORT_SYMBOL_GPL(netcp_unregister_txhook);
84640e27
KM		 510
511int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,
512 netcp_hook_rtn *hook_rtn, void *hook_data)
513{
514 struct netcp_hook_list *entry;
515 struct netcp_hook_list *next;
516 unsigned long flags;
517
518 entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
519 if (!entry)
520 return -ENOMEM;
521
522 entry->hook_rtn = hook_rtn;
523 entry->hook_data = hook_data;
524 entry->order = order;
525
526 spin_lock_irqsave(&netcp_priv->lock, flags);
527 list_for_each_entry(next, &netcp_priv->rxhook_list_head, list) {
528 if (next->order > order)
529 break;
530 }
531 __list_add(&entry->list, next->list.prev, &next->list);
532 spin_unlock_irqrestore(&netcp_priv->lock, flags);
533
534 return 0;
535}
536
537int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,
538 netcp_hook_rtn *hook_rtn, void *hook_data)
539{
540 struct netcp_hook_list *next, *n;
541 unsigned long flags;
542
543 spin_lock_irqsave(&netcp_priv->lock, flags);
544 list_for_each_entry_safe(next, n, &netcp_priv->rxhook_list_head, list) {
545 if ((next->order == order) &&
546 (next->hook_rtn == hook_rtn) &&
547 (next->hook_data == hook_data)) {
548 list_del(&next->list);
549 spin_unlock_irqrestore(&netcp_priv->lock, flags);
550 devm_kfree(netcp_priv->dev, next);
551 return 0;
552 }
553 }
554 spin_unlock_irqrestore(&netcp_priv->lock, flags);
555
556 return -ENOENT;
557}
558
559static void netcp_frag_free(bool is_frag, void *ptr)
560{
561 if (is_frag)
7d525c4e 562 skb_free_frag(ptr);
84640e27
KM		 563 else
564 kfree(ptr);
565}
566
567static void netcp_free_rx_desc_chain(struct netcp_intf *netcp,
568 struct knav_dma_desc *desc)
569{
570 struct knav_dma_desc *ndesc;
571 dma_addr_t dma_desc, dma_buf;
572 unsigned int buf_len, dma_sz = sizeof(*ndesc);
573 void *buf_ptr;
574 u32 tmp;
575
576 get_words(&dma_desc, 1, &desc->next_desc);
577
578 while (dma_desc) {
579 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
580 if (unlikely(!ndesc)) {
581 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
582 break;
583 }
584 get_pkt_info(&dma_buf, &tmp, &dma_desc, ndesc);
585 get_pad_info((u32 *)&buf_ptr, &tmp, ndesc);
586 dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE);
587 __free_page(buf_ptr);
588 knav_pool_desc_put(netcp->rx_pool, desc);
589 }
590
591 get_pad_info((u32 *)&buf_ptr, &buf_len, desc);
592 if (buf_ptr)
593 netcp_frag_free(buf_len <= PAGE_SIZE, buf_ptr);
594 knav_pool_desc_put(netcp->rx_pool, desc);
595}
596
597static void netcp_empty_rx_queue(struct netcp_intf *netcp)
598{
599 struct knav_dma_desc *desc;
600 unsigned int dma_sz;
601 dma_addr_t dma;
602
603 for (; ;) {
604 dma = knav_queue_pop(netcp->rx_queue, &dma_sz);
605 if (!dma)
606 break;
607
608 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
609 if (unlikely(!desc)) {
610 dev_err(netcp->ndev_dev, "%s: failed to unmap Rx desc\n",
611 __func__);
612 netcp->ndev->stats.rx_errors++;
613 continue;
614 }
615 netcp_free_rx_desc_chain(netcp, desc);
616 netcp->ndev->stats.rx_dropped++;
617 }
618}
619
620static int netcp_process_one_rx_packet(struct netcp_intf *netcp)
621{
622 unsigned int dma_sz, buf_len, org_buf_len;
623 struct knav_dma_desc *desc, *ndesc;
624 unsigned int pkt_sz = 0, accum_sz;
625 struct netcp_hook_list *rx_hook;
626 dma_addr_t dma_desc, dma_buff;
627 struct netcp_packet p_info;
628 struct sk_buff *skb;
629 void *org_buf_ptr;
630 u32 tmp;
631
632 dma_desc = knav_queue_pop(netcp->rx_queue, &dma_sz);
633 if (!dma_desc)
634 return -1;
635
636 desc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
637 if (unlikely(!desc)) {
638 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
639 return 0;
640 }
641
642 get_pkt_info(&dma_buff, &buf_len, &dma_desc, desc);
643 get_pad_info((u32 *)&org_buf_ptr, &org_buf_len, desc);
644
645 if (unlikely(!org_buf_ptr)) {
646 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
647 goto free_desc;
648 }
649
650 pkt_sz &= KNAV_DMA_DESC_PKT_LEN_MASK;
651 accum_sz = buf_len;
652 dma_unmap_single(netcp->dev, dma_buff, buf_len, DMA_FROM_DEVICE);
653
654 /* Build a new sk_buff for the primary buffer */
655 skb = build_skb(org_buf_ptr, org_buf_len);
656 if (unlikely(!skb)) {
657 dev_err(netcp->ndev_dev, "build_skb() failed\n");
658 goto free_desc;
659 }
660
661 /* update data, tail and len */
662 skb_reserve(skb, NETCP_SOP_OFFSET);
663 __skb_put(skb, buf_len);
664
665 /* Fill in the page fragment list */
666 while (dma_desc) {
667 struct page *page;
668
669 ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
670 if (unlikely(!ndesc)) {
671 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
672 goto free_desc;
673 }
674
675 get_pkt_info(&dma_buff, &buf_len, &dma_desc, ndesc);
676 get_pad_info((u32 *)&page, &tmp, ndesc);
677
678 if (likely(dma_buff && buf_len && page)) {
679 dma_unmap_page(netcp->dev, dma_buff, PAGE_SIZE,
680 DMA_FROM_DEVICE);
681 } else {
682 dev_err(netcp->ndev_dev, "Bad Rx desc dma_buff(%p), len(%d), page(%p)\n",
683 (void *)dma_buff, buf_len, page);
684 goto free_desc;
685 }
686
687 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
688 offset_in_page(dma_buff), buf_len, PAGE_SIZE);
689 accum_sz += buf_len;
690
691 /* Free the descriptor */
692 knav_pool_desc_put(netcp->rx_pool, ndesc);
693 }
694
695 /* Free the primary descriptor */
696 knav_pool_desc_put(netcp->rx_pool, desc);
697
698 /* check for packet len and warn */
699 if (unlikely(pkt_sz != accum_sz))
700 dev_dbg(netcp->ndev_dev, "mismatch in packet size(%d) & sum of fragments(%d)\n",
701 pkt_sz, accum_sz);
702
703 /* Remove ethernet FCS from the packet */
704 __pskb_trim(skb, skb->len - ETH_FCS_LEN);
705
706 /* Call each of the RX hooks */
707 p_info.skb = skb;
708 p_info.rxtstamp_complete = false;
709 list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) {
710 int ret;
711
712 ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data,
713 &p_info);
714 if (unlikely(ret)) {
715 dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n",
716 rx_hook->order, ret);
717 netcp->ndev->stats.rx_errors++;
718 dev_kfree_skb(skb);
719 return 0;
720 }
721 }
722
84640e27
KM		 723 netcp->ndev->stats.rx_packets++;
724 netcp->ndev->stats.rx_bytes += skb->len;
725
726 /* push skb up the stack */
727 skb->protocol = eth_type_trans(skb, netcp->ndev);
728 netif_receive_skb(skb);
729 return 0;
730
731free_desc:
732 netcp_free_rx_desc_chain(netcp, desc);
733 netcp->ndev->stats.rx_errors++;
734 return 0;
735}
736
737static int netcp_process_rx_packets(struct netcp_intf *netcp,
738 unsigned int budget)
739{
740 int i;
741
742 for (i = 0; (i < budget) && !netcp_process_one_rx_packet(netcp); i++)
743 ;
744 return i;
745}
746
747/* Release descriptors and attached buffers from Rx FDQ */
748static void netcp_free_rx_buf(struct netcp_intf *netcp, int fdq)
749{
750 struct knav_dma_desc *desc;
751 unsigned int buf_len, dma_sz;
752 dma_addr_t dma;
753 void *buf_ptr;
754 u32 tmp;
755
756 /* Allocate descriptor */
757 while ((dma = knav_queue_pop(netcp->rx_fdq[fdq], &dma_sz))) {
758 desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
759 if (unlikely(!desc)) {
760 dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
761 continue;
762 }
763
764 get_org_pkt_info(&dma, &buf_len, desc);
765 get_pad_info((u32 *)&buf_ptr, &tmp, desc);
766
767 if (unlikely(!dma)) {
768 dev_err(netcp->ndev_dev, "NULL orig_buff in desc\n");
769 knav_pool_desc_put(netcp->rx_pool, desc);
770 continue;
771 }
772
773 if (unlikely(!buf_ptr)) {
774 dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
775 knav_pool_desc_put(netcp->rx_pool, desc);
776 continue;
777 }
778
779 if (fdq == 0) {
780 dma_unmap_single(netcp->dev, dma, buf_len,
781 DMA_FROM_DEVICE);
782 netcp_frag_free((buf_len <= PAGE_SIZE), buf_ptr);
783 } else {
784 dma_unmap_page(netcp->dev, dma, buf_len,
785 DMA_FROM_DEVICE);
786 __free_page(buf_ptr);
787 }
788
789 knav_pool_desc_put(netcp->rx_pool, desc);
790 }
791}
792
793static void netcp_rxpool_free(struct netcp_intf *netcp)
794{
795 int i;
796
797 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
798 !IS_ERR_OR_NULL(netcp->rx_fdq[i]); i++)
799 netcp_free_rx_buf(netcp, i);
800
801 if (knav_pool_count(netcp->rx_pool) != netcp->rx_pool_size)
802 dev_err(netcp->ndev_dev, "Lost Rx (%d) descriptors\n",
803 netcp->rx_pool_size - knav_pool_count(netcp->rx_pool));
804
805 knav_pool_destroy(netcp->rx_pool);
806 netcp->rx_pool = NULL;
807}
808
e558b1fb 809static int netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq)
84640e27
KM		 810{
811 struct knav_dma_desc *hwdesc;
812 unsigned int buf_len, dma_sz;
813 u32 desc_info, pkt_info;
814 struct page *page;
815 dma_addr_t dma;
816 void *bufptr;
817 u32 pad[2];
818
819 /* Allocate descriptor */
820 hwdesc = knav_pool_desc_get(netcp->rx_pool);
821 if (IS_ERR_OR_NULL(hwdesc)) {
822 dev_dbg(netcp->ndev_dev, "out of rx pool desc\n");
e558b1fb 823 return -ENOMEM;
84640e27
KM		 824 }
825
826 if (likely(fdq == 0)) {
827 unsigned int primary_buf_len;
828 /* Allocate a primary receive queue entry */
866b8b18 829 buf_len = NETCP_PACKET_SIZE + NETCP_SOP_OFFSET;
84640e27
KM		 830 primary_buf_len = SKB_DATA_ALIGN(buf_len) +
831 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
832
866b8b18
WK		 833 bufptr = netdev_alloc_frag(primary_buf_len);
834 pad[1] = primary_buf_len;
84640e27
KM		 835
836 if (unlikely(!bufptr)) {
866b8b18
WK		 837 dev_warn_ratelimited(netcp->ndev_dev,
838 "Primary RX buffer alloc failed\n");
84640e27
KM		 839 goto fail;
840 }
841 dma = dma_map_single(netcp->dev, bufptr, buf_len,
842 DMA_TO_DEVICE);
866b8b18
WK		 843 if (unlikely(dma_mapping_error(netcp->dev, dma)))
844 goto fail;
845
84640e27
KM		 846 pad[0] = (u32)bufptr;
847
848 } else {
849 /* Allocate a secondary receive queue entry */
866b8b18 850 page = alloc_page(GFP_ATOMIC | GFP_DMA | __GFP_COLD);
84640e27
KM		 851 if (unlikely(!page)) {
852 dev_warn_ratelimited(netcp->ndev_dev, "Secondary page alloc failed\n");
853 goto fail;
854 }
855 buf_len = PAGE_SIZE;
856 dma = dma_map_page(netcp->dev, page, 0, buf_len, DMA_TO_DEVICE);
857 pad[0] = (u32)page;
858 pad[1] = 0;
859 }
860
861 desc_info = KNAV_DMA_DESC_PS_INFO_IN_DESC;
862 desc_info |= buf_len & KNAV_DMA_DESC_PKT_LEN_MASK;
863 pkt_info = KNAV_DMA_DESC_HAS_EPIB;
864 pkt_info |= KNAV_DMA_NUM_PS_WORDS << KNAV_DMA_DESC_PSLEN_SHIFT;
865 pkt_info |= (netcp->rx_queue_id & KNAV_DMA_DESC_RETQ_MASK) <<
866 KNAV_DMA_DESC_RETQ_SHIFT;
867 set_org_pkt_info(dma, buf_len, hwdesc);
868 set_pad_info(pad[0], pad[1], hwdesc);
869 set_desc_info(desc_info, pkt_info, hwdesc);
870
871 /* Push to FDQs */
872 knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma,
873 &dma_sz);
874 knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0);
e558b1fb 875 return 0;
84640e27
KM		 876
877fail:
878 knav_pool_desc_put(netcp->rx_pool, hwdesc);
e558b1fb 879 return -ENOMEM;
84640e27
KM		 880}
881
882/* Refill Rx FDQ with descriptors & attached buffers */
883static void netcp_rxpool_refill(struct netcp_intf *netcp)
884{
885 u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0};
e558b1fb 886 int i, ret = 0;
84640e27
KM		 887
888 /* Calculate the FDQ deficit and refill */
889 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) {
890 fdq_deficit[i] = netcp->rx_queue_depths[i] -
891 knav_queue_get_count(netcp->rx_fdq[i]);
892
e558b1fb
KM		 893 while (fdq_deficit[i]-- && !ret)
894 ret = netcp_allocate_rx_buf(netcp, i);
84640e27
KM		 895 } /* end for fdqs */
896}
897
898/* NAPI poll */
899static int netcp_rx_poll(struct napi_struct *napi, int budget)
900{
901 struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
902 rx_napi);
903 unsigned int packets;
904
905 packets = netcp_process_rx_packets(netcp, budget);
906
907 if (packets < budget) {
908 napi_complete(&netcp->rx_napi);
909 knav_queue_enable_notify(netcp->rx_queue);
910 }
911
912 netcp_rxpool_refill(netcp);
913 return packets;
914}
915
916static void netcp_rx_notify(void *arg)
917{
918 struct netcp_intf *netcp = arg;
919
920 knav_queue_disable_notify(netcp->rx_queue);
921 napi_schedule(&netcp->rx_napi);
922}
923
924static void netcp_free_tx_desc_chain(struct netcp_intf *netcp,
925 struct knav_dma_desc *desc,
926 unsigned int desc_sz)
927{
928 struct knav_dma_desc *ndesc = desc;
929 dma_addr_t dma_desc, dma_buf;
930 unsigned int buf_len;
931
932 while (ndesc) {
933 get_pkt_info(&dma_buf, &buf_len, &dma_desc, ndesc);
934
935 if (dma_buf && buf_len)
936 dma_unmap_single(netcp->dev, dma_buf, buf_len,
937 DMA_TO_DEVICE);
938 else
939 dev_warn(netcp->ndev_dev, "bad Tx desc buf(%p), len(%d)\n",
940 (void *)dma_buf, buf_len);
941
942 knav_pool_desc_put(netcp->tx_pool, ndesc);
943 ndesc = NULL;
944 if (dma_desc) {
945 ndesc = knav_pool_desc_unmap(netcp->tx_pool, dma_desc,
946 desc_sz);
947 if (!ndesc)
948 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
949 }
950 }
951}
952
953static int netcp_process_tx_compl_packets(struct netcp_intf *netcp,
954 unsigned int budget)
955{
956 struct knav_dma_desc *desc;
957 struct sk_buff *skb;
958 unsigned int dma_sz;
959 dma_addr_t dma;
960 int pkts = 0;
961 u32 tmp;
962
963 while (budget--) {
964 dma = knav_queue_pop(netcp->tx_compl_q, &dma_sz);
965 if (!dma)
966 break;
967 desc = knav_pool_desc_unmap(netcp->tx_pool, dma, dma_sz);
968 if (unlikely(!desc)) {
969 dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
970 netcp->ndev->stats.tx_errors++;
971 continue;
972 }
973
974 get_pad_info((u32 *)&skb, &tmp, desc);
975 netcp_free_tx_desc_chain(netcp, desc, dma_sz);
976 if (!skb) {
977 dev_err(netcp->ndev_dev, "No skb in Tx desc\n");
978 netcp->ndev->stats.tx_errors++;
979 continue;
980 }
981
982 if (netif_subqueue_stopped(netcp->ndev, skb) &&
983 netif_running(netcp->ndev) &&
984 (knav_pool_count(netcp->tx_pool) >
985 netcp->tx_resume_threshold)) {
986 u16 subqueue = skb_get_queue_mapping(skb);
987
988 netif_wake_subqueue(netcp->ndev, subqueue);
989 }
990
991 netcp->ndev->stats.tx_packets++;
992 netcp->ndev->stats.tx_bytes += skb->len;
993 dev_kfree_skb(skb);
994 pkts++;
995 }
996 return pkts;
997}
998
999static int netcp_tx_poll(struct napi_struct *napi, int budget)
1000{
1001 int packets;
1002 struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
1003 tx_napi);
1004
1005 packets = netcp_process_tx_compl_packets(netcp, budget);
1006 if (packets < budget) {
1007 napi_complete(&netcp->tx_napi);
1008 knav_queue_enable_notify(netcp->tx_compl_q);
1009 }
1010
1011 return packets;
1012}
1013
1014static void netcp_tx_notify(void *arg)
1015{
1016 struct netcp_intf *netcp = arg;
1017
1018 knav_queue_disable_notify(netcp->tx_compl_q);
1019 napi_schedule(&netcp->tx_napi);
1020}
1021
1022static struct knav_dma_desc*
1023netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp)
1024{
1025 struct knav_dma_desc *desc, *ndesc, *pdesc;
1026 unsigned int pkt_len = skb_headlen(skb);
1027 struct device *dev = netcp->dev;
1028 dma_addr_t dma_addr;
1029 unsigned int dma_sz;
1030 int i;
1031
1032 /* Map the linear buffer */
1033 dma_addr = dma_map_single(dev, skb->data, pkt_len, DMA_TO_DEVICE);
866b8b18 1034 if (unlikely(dma_mapping_error(dev, dma_addr))) {
84640e27
KM		 1035 dev_err(netcp->ndev_dev, "Failed to map skb buffer\n");
1036 return NULL;
1037 }
1038
1039 desc = knav_pool_desc_get(netcp->tx_pool);
1040 if (unlikely(IS_ERR_OR_NULL(desc))) {
1041 dev_err(netcp->ndev_dev, "out of TX desc\n");
1042 dma_unmap_single(dev, dma_addr, pkt_len, DMA_TO_DEVICE);
1043 return NULL;
1044 }
1045
1046 set_pkt_info(dma_addr, pkt_len, 0, desc);
1047 if (skb_is_nonlinear(skb)) {
1048 prefetchw(skb_shinfo(skb));
1049 } else {
1050 desc->next_desc = 0;
1051 goto upd_pkt_len;
1052 }
1053
1054 pdesc = desc;
1055
1056 /* Handle the case where skb is fragmented in pages */
1057 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1058 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1059 struct page *page = skb_frag_page(frag);
1060 u32 page_offset = frag->page_offset;
1061 u32 buf_len = skb_frag_size(frag);
1062 dma_addr_t desc_dma;
1063 u32 pkt_info;
1064
1065 dma_addr = dma_map_page(dev, page, page_offset, buf_len,
1066 DMA_TO_DEVICE);
1067 if (unlikely(!dma_addr)) {
1068 dev_err(netcp->ndev_dev, "Failed to map skb page\n");
1069 goto free_descs;
1070 }
1071
1072 ndesc = knav_pool_desc_get(netcp->tx_pool);
1073 if (unlikely(IS_ERR_OR_NULL(ndesc))) {
1074 dev_err(netcp->ndev_dev, "out of TX desc for frags\n");
1075 dma_unmap_page(dev, dma_addr, buf_len, DMA_TO_DEVICE);
1076 goto free_descs;
1077 }
1078
1079 desc_dma = knav_pool_desc_virt_to_dma(netcp->tx_pool,
1080 (void *)ndesc);
1081 pkt_info =
1082 (netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<
1083 KNAV_DMA_DESC_RETQ_SHIFT;
1084 set_pkt_info(dma_addr, buf_len, 0, ndesc);
1085 set_words(&desc_dma, 1, &pdesc->next_desc);
1086 pkt_len += buf_len;
1087 if (pdesc != desc)
1088 knav_pool_desc_map(netcp->tx_pool, pdesc,
1089 sizeof(*pdesc), &desc_dma, &dma_sz);
1090 pdesc = ndesc;
1091 }
1092 if (pdesc != desc)
1093 knav_pool_desc_map(netcp->tx_pool, pdesc, sizeof(*pdesc),
1094 &dma_addr, &dma_sz);
1095
1096 /* frag list based linkage is not supported for now. */
1097 if (skb_shinfo(skb)->frag_list) {
1098 dev_err_ratelimited(netcp->ndev_dev, "NETIF_F_FRAGLIST not supported\n");
1099 goto free_descs;
1100 }
1101
1102upd_pkt_len:
1103 WARN_ON(pkt_len != skb->len);
1104
1105 pkt_len &= KNAV_DMA_DESC_PKT_LEN_MASK;
1106 set_words(&pkt_len, 1, &desc->desc_info);
1107 return desc;
1108
1109free_descs:
1110 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
1111 return NULL;
1112}
1113
1114static int netcp_tx_submit_skb(struct netcp_intf *netcp,
1115 struct sk_buff *skb,
1116 struct knav_dma_desc *desc)
1117{
1118 struct netcp_tx_pipe *tx_pipe = NULL;
1119 struct netcp_hook_list *tx_hook;
1120 struct netcp_packet p_info;
84640e27
KM		 1121 unsigned int dma_sz;
1122 dma_addr_t dma;
e170f409 1123 u32 tmp = 0;
84640e27
KM		 1124 int ret = 0;
1125
1126 p_info.netcp = netcp;
1127 p_info.skb = skb;
1128 p_info.tx_pipe = NULL;
1129 p_info.psdata_len = 0;
1130 p_info.ts_context = NULL;
1131 p_info.txtstamp_complete = NULL;
1132 p_info.epib = desc->epib;
1133 p_info.psdata = desc->psdata;
1134 memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(u32));
1135
1136 /* Find out where to inject the packet for transmission */
1137 list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) {
1138 ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data,
1139 &p_info);
1140 if (unlikely(ret != 0)) {
1141 dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n",
1142 tx_hook->order, ret);
1143 ret = (ret < 0) ? ret : NETDEV_TX_OK;
1144 goto out;
1145 }
1146 }
1147
1148 /* Make sure some TX hook claimed the packet */
1149 tx_pipe = p_info.tx_pipe;
1150 if (!tx_pipe) {
1151 dev_err(netcp->ndev_dev, "No TX hook claimed the packet!\n");
1152 ret = -ENXIO;
1153 goto out;
1154 }
1155
1156 /* update descriptor */
1157 if (p_info.psdata_len) {
1158 u32 *psdata = p_info.psdata;
1159
1160 memmove(p_info.psdata, p_info.psdata + p_info.psdata_len,
1161 p_info.psdata_len);
1162 set_words(psdata, p_info.psdata_len, psdata);
e170f409 1163 tmp |= (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) <<
84640e27
KM		 1164 KNAV_DMA_DESC_PSLEN_SHIFT;
1165 }
1166
e170f409 1167 tmp |= KNAV_DMA_DESC_HAS_EPIB |
84640e27 1168 ((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<
e170f409 1169 KNAV_DMA_DESC_RETQ_SHIFT);
84640e27 1170
e170f409
KM		 1171 if (!(tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO)) {
1172 tmp |= ((tx_pipe->switch_to_port & KNAV_DMA_DESC_PSFLAG_MASK) <<
1173 KNAV_DMA_DESC_PSFLAG_SHIFT);
1174 }
1175
1176 set_words(&tmp, 1, &desc->packet_info);
84640e27
KM		 1177 set_words((u32 *)&skb, 1, &desc->pad[0]);
1178
e170f409
KM		 1179 if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) {
1180 tmp = tx_pipe->switch_to_port;
1181 set_words((u32 *)&tmp, 1, &desc->tag_info);
1182 }
1183
84640e27
KM		 1184 /* submit packet descriptor */
1185 ret = knav_pool_desc_map(netcp->tx_pool, desc, sizeof(*desc), &dma,
1186 &dma_sz);
1187 if (unlikely(ret)) {
1188 dev_err(netcp->ndev_dev, "%s() failed to map desc\n", __func__);
1189 ret = -ENOMEM;
1190 goto out;
1191 }
1192 skb_tx_timestamp(skb);
1193 knav_queue_push(tx_pipe->dma_queue, dma, dma_sz, 0);
1194
1195out:
1196 return ret;
1197}
1198
1199/* Submit the packet */
1200static int netcp_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1201{
1202 struct netcp_intf *netcp = netdev_priv(ndev);
1203 int subqueue = skb_get_queue_mapping(skb);
1204 struct knav_dma_desc *desc;
1205 int desc_count, ret = 0;
1206
1207 if (unlikely(skb->len <= 0)) {
1208 dev_kfree_skb(skb);
1209 return NETDEV_TX_OK;
1210 }
1211
1212 if (unlikely(skb->len < NETCP_MIN_PACKET_SIZE)) {
1213 ret = skb_padto(skb, NETCP_MIN_PACKET_SIZE);
1214 if (ret < 0) {
1215 /* If we get here, the skb has already been dropped */
1216 dev_warn(netcp->ndev_dev, "padding failed (%d), packet dropped\n",
1217 ret);
1218 ndev->stats.tx_dropped++;
1219 return ret;
1220 }
1221 skb->len = NETCP_MIN_PACKET_SIZE;
1222 }
1223
1224 desc = netcp_tx_map_skb(skb, netcp);
1225 if (unlikely(!desc)) {
1226 netif_stop_subqueue(ndev, subqueue);
1227 ret = -ENOBUFS;
1228 goto drop;
1229 }
1230
1231 ret = netcp_tx_submit_skb(netcp, skb, desc);
1232 if (ret)
1233 goto drop;
1234
1235 ndev->trans_start = jiffies;
1236
1237 /* Check Tx pool count & stop subqueue if needed */
1238 desc_count = knav_pool_count(netcp->tx_pool);
1239 if (desc_count < netcp->tx_pause_threshold) {
1240 dev_dbg(netcp->ndev_dev, "pausing tx, count(%d)\n", desc_count);
1241 netif_stop_subqueue(ndev, subqueue);
1242 }
1243 return NETDEV_TX_OK;
1244
1245drop:
1246 ndev->stats.tx_dropped++;
1247 if (desc)
1248 netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
1249 dev_kfree_skb(skb);
1250 return ret;
1251}
1252
1253int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe)
1254{
1255 if (tx_pipe->dma_channel) {
1256 knav_dma_close_channel(tx_pipe->dma_channel);
1257 tx_pipe->dma_channel = NULL;
1258 }
1259 return 0;
1260}
58c11b5f 1261EXPORT_SYMBOL_GPL(netcp_txpipe_close);
84640e27
KM		 1262
1263int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe)
1264{
1265 struct device *dev = tx_pipe->netcp_device->device;
1266 struct knav_dma_cfg config;
1267 int ret = 0;
1268 u8 name[16];
1269
1270 memset(&config, 0, sizeof(config));
1271 config.direction = DMA_MEM_TO_DEV;
1272 config.u.tx.filt_einfo = false;
1273 config.u.tx.filt_pswords = false;
1274 config.u.tx.priority = DMA_PRIO_MED_L;
1275
1276 tx_pipe->dma_channel = knav_dma_open_channel(dev,
1277 tx_pipe->dma_chan_name, &config);
1278 if (IS_ERR_OR_NULL(tx_pipe->dma_channel)) {
1279 dev_err(dev, "failed opening tx chan(%s)\n",
1280 tx_pipe->dma_chan_name);
1281 goto err;
1282 }
1283
1284 snprintf(name, sizeof(name), "tx-pipe-%s", dev_name(dev));
1285 tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id,
1286 KNAV_QUEUE_SHARED);
1287 if (IS_ERR(tx_pipe->dma_queue)) {
1288 dev_err(dev, "Could not open DMA queue for channel \"%s\": %d\n",
1289 name, ret);
1290 ret = PTR_ERR(tx_pipe->dma_queue);
1291 goto err;
1292 }
1293
1294 dev_dbg(dev, "opened tx pipe %s\n", name);
1295 return 0;
1296
1297err:
1298 if (!IS_ERR_OR_NULL(tx_pipe->dma_channel))
1299 knav_dma_close_channel(tx_pipe->dma_channel);
1300 tx_pipe->dma_channel = NULL;
1301 return ret;
1302}
58c11b5f 1303EXPORT_SYMBOL_GPL(netcp_txpipe_open);
84640e27
KM		 1304
1305int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,
1306 struct netcp_device *netcp_device,
1307 const char *dma_chan_name, unsigned int dma_queue_id)
1308{
1309 memset(tx_pipe, 0, sizeof(*tx_pipe));
1310 tx_pipe->netcp_device = netcp_device;
1311 tx_pipe->dma_chan_name = dma_chan_name;
1312 tx_pipe->dma_queue_id = dma_queue_id;
1313 return 0;
1314}
58c11b5f 1315EXPORT_SYMBOL_GPL(netcp_txpipe_init);
84640e27
KM		 1316
1317static struct netcp_addr *netcp_addr_find(struct netcp_intf *netcp,
1318 const u8 *addr,
1319 enum netcp_addr_type type)
1320{
1321 struct netcp_addr *naddr;
1322
1323 list_for_each_entry(naddr, &netcp->addr_list, node) {
1324 if (naddr->type != type)
1325 continue;
1326 if (addr && memcmp(addr, naddr->addr, ETH_ALEN))
1327 continue;
1328 return naddr;
1329 }
1330
1331 return NULL;
1332}
1333
1334static struct netcp_addr *netcp_addr_add(struct netcp_intf *netcp,
1335 const u8 *addr,
1336 enum netcp_addr_type type)
1337{
1338 struct netcp_addr *naddr;
1339
1340 naddr = devm_kmalloc(netcp->dev, sizeof(*naddr), GFP_ATOMIC);
1341 if (!naddr)
1342 return NULL;
1343
1344 naddr->type = type;
1345 naddr->flags = 0;
1346 naddr->netcp = netcp;
1347 if (addr)
1348 ether_addr_copy(naddr->addr, addr);
1349 else
c7bf7169 1350 eth_zero_addr(naddr->addr);
84640e27
KM		 1351 list_add_tail(&naddr->node, &netcp->addr_list);
1352
1353 return naddr;
1354}
1355
1356static void netcp_addr_del(struct netcp_intf *netcp, struct netcp_addr *naddr)
1357{
1358 list_del(&naddr->node);
1359 devm_kfree(netcp->dev, naddr);
1360}
1361
1362static void netcp_addr_clear_mark(struct netcp_intf *netcp)
1363{
1364 struct netcp_addr *naddr;
1365
1366 list_for_each_entry(naddr, &netcp->addr_list, node)
1367 naddr->flags = 0;
1368}
1369
1370static void netcp_addr_add_mark(struct netcp_intf *netcp, const u8 *addr,
1371 enum netcp_addr_type type)
1372{
1373 struct netcp_addr *naddr;
1374
1375 naddr = netcp_addr_find(netcp, addr, type);
1376 if (naddr) {
1377 naddr->flags |= ADDR_VALID;
1378 return;
1379 }
1380
1381 naddr = netcp_addr_add(netcp, addr, type);
1382 if (!WARN_ON(!naddr))
1383 naddr->flags |= ADDR_NEW;
1384}
1385
1386static void netcp_addr_sweep_del(struct netcp_intf *netcp)
1387{
1388 struct netcp_addr *naddr, *tmp;
1389 struct netcp_intf_modpriv *priv;
1390 struct netcp_module *module;
1391 int error;
1392
1393 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
1394 if (naddr->flags & (ADDR_VALID | ADDR_NEW))
1395 continue;
1396 dev_dbg(netcp->ndev_dev, "deleting address %pM, type %x\n",
1397 naddr->addr, naddr->type);
1398 mutex_lock(&netcp_modules_lock);
1399 for_each_module(netcp, priv) {
1400 module = priv->netcp_module;
1401 if (!module->del_addr)
1402 continue;
1403 error = module->del_addr(priv->module_priv,
1404 naddr);
1405 WARN_ON(error);
1406 }
1407 mutex_unlock(&netcp_modules_lock);
1408 netcp_addr_del(netcp, naddr);
1409 }
1410}
1411
1412static void netcp_addr_sweep_add(struct netcp_intf *netcp)
1413{
1414 struct netcp_addr *naddr, *tmp;
1415 struct netcp_intf_modpriv *priv;
1416 struct netcp_module *module;
1417 int error;
1418
1419 list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
1420 if (!(naddr->flags & ADDR_NEW))
1421 continue;
1422 dev_dbg(netcp->ndev_dev, "adding address %pM, type %x\n",
1423 naddr->addr, naddr->type);
1424 mutex_lock(&netcp_modules_lock);
1425 for_each_module(netcp, priv) {
1426 module = priv->netcp_module;
1427 if (!module->add_addr)
1428 continue;
1429 error = module->add_addr(priv->module_priv, naddr);
1430 WARN_ON(error);
1431 }
1432 mutex_unlock(&netcp_modules_lock);
1433 }
1434}
1435
1436static void netcp_set_rx_mode(struct net_device *ndev)
1437{
1438 struct netcp_intf *netcp = netdev_priv(ndev);
1439 struct netdev_hw_addr *ndev_addr;
1440 bool promisc;
1441
1442 promisc = (ndev->flags & IFF_PROMISC ||
1443 ndev->flags & IFF_ALLMULTI ||
1444 netdev_mc_count(ndev) > NETCP_MAX_MCAST_ADDR);
1445
1446 /* first clear all marks */
1447 netcp_addr_clear_mark(netcp);
1448
1449 /* next add new entries, mark existing ones */
1450 netcp_addr_add_mark(netcp, ndev->broadcast, ADDR_BCAST);
1451 for_each_dev_addr(ndev, ndev_addr)
1452 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_DEV);
1453 netdev_for_each_uc_addr(ndev_addr, ndev)
1454 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_UCAST);
1455 netdev_for_each_mc_addr(ndev_addr, ndev)
1456 netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_MCAST);
1457
1458 if (promisc)
1459 netcp_addr_add_mark(netcp, NULL, ADDR_ANY);
1460
1461 /* finally sweep and callout into modules */
1462 netcp_addr_sweep_del(netcp);
1463 netcp_addr_sweep_add(netcp);
1464}
1465
1466static void netcp_free_navigator_resources(struct netcp_intf *netcp)
1467{
1468 int i;
1469
1470 if (netcp->rx_channel) {
1471 knav_dma_close_channel(netcp->rx_channel);
1472 netcp->rx_channel = NULL;
1473 }
1474
1475 if (!IS_ERR_OR_NULL(netcp->rx_pool))
1476 netcp_rxpool_free(netcp);
1477
1478 if (!IS_ERR_OR_NULL(netcp->rx_queue)) {
1479 knav_queue_close(netcp->rx_queue);
1480 netcp->rx_queue = NULL;
1481 }
1482
1483 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
1484 !IS_ERR_OR_NULL(netcp->rx_fdq[i]) ; ++i) {
1485 knav_queue_close(netcp->rx_fdq[i]);
1486 netcp->rx_fdq[i] = NULL;
1487 }
1488
1489 if (!IS_ERR_OR_NULL(netcp->tx_compl_q)) {
1490 knav_queue_close(netcp->tx_compl_q);
1491 netcp->tx_compl_q = NULL;
1492 }
1493
1494 if (!IS_ERR_OR_NULL(netcp->tx_pool)) {
1495 knav_pool_destroy(netcp->tx_pool);
1496 netcp->tx_pool = NULL;
1497 }
1498}
1499
1500static int netcp_setup_navigator_resources(struct net_device *ndev)
1501{
1502 struct netcp_intf *netcp = netdev_priv(ndev);
1503 struct knav_queue_notify_config notify_cfg;
1504 struct knav_dma_cfg config;
1505 u32 last_fdq = 0;
1506 u8 name[16];
1507 int ret;
1508 int i;
1509
1510 /* Create Rx/Tx descriptor pools */
1511 snprintf(name, sizeof(name), "rx-pool-%s", ndev->name);
1512 netcp->rx_pool = knav_pool_create(name, netcp->rx_pool_size,
1513 netcp->rx_pool_region_id);
1514 if (IS_ERR_OR_NULL(netcp->rx_pool)) {
1515 dev_err(netcp->ndev_dev, "Couldn't create rx pool\n");
1516 ret = PTR_ERR(netcp->rx_pool);
1517 goto fail;
1518 }
1519
1520 snprintf(name, sizeof(name), "tx-pool-%s", ndev->name);
1521 netcp->tx_pool = knav_pool_create(name, netcp->tx_pool_size,
1522 netcp->tx_pool_region_id);
1523 if (IS_ERR_OR_NULL(netcp->tx_pool)) {
1524 dev_err(netcp->ndev_dev, "Couldn't create tx pool\n");
1525 ret = PTR_ERR(netcp->tx_pool);
1526 goto fail;
1527 }
1528
1529 /* open Tx completion queue */
1530 snprintf(name, sizeof(name), "tx-compl-%s", ndev->name);
1531 netcp->tx_compl_q = knav_queue_open(name, netcp->tx_compl_qid, 0);
1532 if (IS_ERR_OR_NULL(netcp->tx_compl_q)) {
1533 ret = PTR_ERR(netcp->tx_compl_q);
1534 goto fail;
1535 }
1536 netcp->tx_compl_qid = knav_queue_get_id(netcp->tx_compl_q);
1537
1538 /* Set notification for Tx completion */
1539 notify_cfg.fn = netcp_tx_notify;
1540 notify_cfg.fn_arg = netcp;
1541 ret = knav_queue_device_control(netcp->tx_compl_q,
1542 KNAV_QUEUE_SET_NOTIFIER,
1543 (unsigned long)&notify_cfg);
1544 if (ret)
1545 goto fail;
1546
1547 knav_queue_disable_notify(netcp->tx_compl_q);
1548
1549 /* open Rx completion queue */
1550 snprintf(name, sizeof(name), "rx-compl-%s", ndev->name);
1551 netcp->rx_queue = knav_queue_open(name, netcp->rx_queue_id, 0);
1552 if (IS_ERR_OR_NULL(netcp->rx_queue)) {
1553 ret = PTR_ERR(netcp->rx_queue);
1554 goto fail;
1555 }
1556 netcp->rx_queue_id = knav_queue_get_id(netcp->rx_queue);
1557
1558 /* Set notification for Rx completion */
1559 notify_cfg.fn = netcp_rx_notify;
1560 notify_cfg.fn_arg = netcp;
1561 ret = knav_queue_device_control(netcp->rx_queue,
1562 KNAV_QUEUE_SET_NOTIFIER,
1563 (unsigned long)&notify_cfg);
1564 if (ret)
1565 goto fail;
1566
1567 knav_queue_disable_notify(netcp->rx_queue);
1568
1569 /* open Rx FDQs */
866b8b18
WK		 1570 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_queue_depths[i];
1571 ++i) {
84640e27
KM		 1572 snprintf(name, sizeof(name), "rx-fdq-%s-%d", ndev->name, i);
1573 netcp->rx_fdq[i] = knav_queue_open(name, KNAV_QUEUE_GP, 0);
1574 if (IS_ERR_OR_NULL(netcp->rx_fdq[i])) {
1575 ret = PTR_ERR(netcp->rx_fdq[i]);
1576 goto fail;
1577 }
1578 }
1579
1580 memset(&config, 0, sizeof(config));
1581 config.direction = DMA_DEV_TO_MEM;
1582 config.u.rx.einfo_present = true;
1583 config.u.rx.psinfo_present = true;
1584 config.u.rx.err_mode = DMA_DROP;
1585 config.u.rx.desc_type = DMA_DESC_HOST;
1586 config.u.rx.psinfo_at_sop = false;
1587 config.u.rx.sop_offset = NETCP_SOP_OFFSET;
1588 config.u.rx.dst_q = netcp->rx_queue_id;
1589 config.u.rx.thresh = DMA_THRESH_NONE;
1590
1591 for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN; ++i) {
1592 if (netcp->rx_fdq[i])
1593 last_fdq = knav_queue_get_id(netcp->rx_fdq[i]);
1594 config.u.rx.fdq[i] = last_fdq;
1595 }
1596
1597 netcp->rx_channel = knav_dma_open_channel(netcp->netcp_device->device,
1598 netcp->dma_chan_name, &config);
1599 if (IS_ERR_OR_NULL(netcp->rx_channel)) {
1600 dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n",
1601 netcp->dma_chan_name);
1602 goto fail;
1603 }
1604
1605 dev_dbg(netcp->ndev_dev, "opened RX channel: %p\n", netcp->rx_channel);
1606 return 0;
1607
1608fail:
1609 netcp_free_navigator_resources(netcp);
1610 return ret;
1611}
1612
1613/* Open the device */
1614static int netcp_ndo_open(struct net_device *ndev)
1615{
1616 struct netcp_intf *netcp = netdev_priv(ndev);
1617 struct netcp_intf_modpriv *intf_modpriv;
1618 struct netcp_module *module;
1619 int ret;
1620
1621 netif_carrier_off(ndev);
1622 ret = netcp_setup_navigator_resources(ndev);
1623 if (ret) {
1624 dev_err(netcp->ndev_dev, "Failed to setup navigator resources\n");
1625 goto fail;
1626 }
1627
1628 mutex_lock(&netcp_modules_lock);
1629 for_each_module(netcp, intf_modpriv) {
1630 module = intf_modpriv->netcp_module;
1631 if (module->open) {
1632 ret = module->open(intf_modpriv->module_priv, ndev);
1633 if (ret != 0) {
1634 dev_err(netcp->ndev_dev, "module open failed\n");
1635 goto fail_open;
1636 }
1637 }
1638 }
1639 mutex_unlock(&netcp_modules_lock);
1640
84640e27
KM		 1641 napi_enable(&netcp->rx_napi);
1642 napi_enable(&netcp->tx_napi);
1643 knav_queue_enable_notify(netcp->tx_compl_q);
1644 knav_queue_enable_notify(netcp->rx_queue);
194ac06e 1645 netcp_rxpool_refill(netcp);
84640e27
KM		 1646 netif_tx_wake_all_queues(ndev);
1647 dev_dbg(netcp->ndev_dev, "netcp device %s opened\n", ndev->name);
1648 return 0;
1649
1650fail_open:
1651 for_each_module(netcp, intf_modpriv) {
1652 module = intf_modpriv->netcp_module;
1653 if (module->close)
1654 module->close(intf_modpriv->module_priv, ndev);
1655 }
1656 mutex_unlock(&netcp_modules_lock);
1657
1658fail:
1659 netcp_free_navigator_resources(netcp);
1660 return ret;
1661}
1662
1663/* Close the device */
1664static int netcp_ndo_stop(struct net_device *ndev)
1665{
1666 struct netcp_intf *netcp = netdev_priv(ndev);
1667 struct netcp_intf_modpriv *intf_modpriv;
1668 struct netcp_module *module;
1669 int err = 0;
1670
1671 netif_tx_stop_all_queues(ndev);
1672 netif_carrier_off(ndev);
1673 netcp_addr_clear_mark(netcp);
1674 netcp_addr_sweep_del(netcp);
1675 knav_queue_disable_notify(netcp->rx_queue);
1676 knav_queue_disable_notify(netcp->tx_compl_q);
1677 napi_disable(&netcp->rx_napi);
1678 napi_disable(&netcp->tx_napi);
1679
1680 mutex_lock(&netcp_modules_lock);
1681 for_each_module(netcp, intf_modpriv) {
1682 module = intf_modpriv->netcp_module;
1683 if (module->close) {
1684 err = module->close(intf_modpriv->module_priv, ndev);
1685 if (err != 0)
1686 dev_err(netcp->ndev_dev, "Close failed\n");
1687 }
1688 }
1689 mutex_unlock(&netcp_modules_lock);
1690
1691 /* Recycle Rx descriptors from completion queue */
1692 netcp_empty_rx_queue(netcp);
1693
1694 /* Recycle Tx descriptors from completion queue */
1695 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
1696
1697 if (knav_pool_count(netcp->tx_pool) != netcp->tx_pool_size)
1698 dev_err(netcp->ndev_dev, "Lost (%d) Tx descs\n",
1699 netcp->tx_pool_size - knav_pool_count(netcp->tx_pool));
1700
1701 netcp_free_navigator_resources(netcp);
1702 dev_dbg(netcp->ndev_dev, "netcp device %s stopped\n", ndev->name);
1703 return 0;
1704}
1705
1706static int netcp_ndo_ioctl(struct net_device *ndev,
1707 struct ifreq *req, int cmd)
1708{
1709 struct netcp_intf *netcp = netdev_priv(ndev);
1710 struct netcp_intf_modpriv *intf_modpriv;
1711 struct netcp_module *module;
1712 int ret = -1, err = -EOPNOTSUPP;
1713
1714 if (!netif_running(ndev))
1715 return -EINVAL;
1716
1717 mutex_lock(&netcp_modules_lock);
1718 for_each_module(netcp, intf_modpriv) {
1719 module = intf_modpriv->netcp_module;
1720 if (!module->ioctl)
1721 continue;
1722
1723 err = module->ioctl(intf_modpriv->module_priv, req, cmd);
1724 if ((err < 0) && (err != -EOPNOTSUPP)) {
1725 ret = err;
1726 goto out;
1727 }
1728 if (err == 0)
1729 ret = err;
1730 }
1731
1732out:
1733 mutex_unlock(&netcp_modules_lock);
1734 return (ret == 0) ? 0 : err;
1735}
1736
1737static int netcp_ndo_change_mtu(struct net_device *ndev, int new_mtu)
1738{
1739 struct netcp_intf *netcp = netdev_priv(ndev);
1740
1741 /* MTU < 68 is an error for IPv4 traffic */
1742 if ((new_mtu < 68) ||
1743 (new_mtu > (NETCP_MAX_FRAME_SIZE - ETH_HLEN - ETH_FCS_LEN))) {
1744 dev_err(netcp->ndev_dev, "Invalid mtu size = %d\n", new_mtu);
1745 return -EINVAL;
1746 }
1747
1748 ndev->mtu = new_mtu;
1749 return 0;
1750}
1751
1752static void netcp_ndo_tx_timeout(struct net_device *ndev)
1753{
1754 struct netcp_intf *netcp = netdev_priv(ndev);
1755 unsigned int descs = knav_pool_count(netcp->tx_pool);
1756
1757 dev_err(netcp->ndev_dev, "transmit timed out tx descs(%d)\n", descs);
1758 netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
1759 ndev->trans_start = jiffies;
1760 netif_tx_wake_all_queues(ndev);
1761}
1762
1763static int netcp_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid)
1764{
1765 struct netcp_intf *netcp = netdev_priv(ndev);
1766 struct netcp_intf_modpriv *intf_modpriv;
1767 struct netcp_module *module;
1768 int err = 0;
1769
1770 dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid);
1771
1772 mutex_lock(&netcp_modules_lock);
1773 for_each_module(netcp, intf_modpriv) {
1774 module = intf_modpriv->netcp_module;
1775 if ((module->add_vid) && (vid != 0)) {
1776 err = module->add_vid(intf_modpriv->module_priv, vid);
1777 if (err != 0) {
1778 dev_err(netcp->ndev_dev, "Could not add vlan id = %d\n",
1779 vid);
1780 break;
1781 }
1782 }
1783 }
1784 mutex_unlock(&netcp_modules_lock);
1785 return err;
1786}
1787
1788static int netcp_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid)
1789{
1790 struct netcp_intf *netcp = netdev_priv(ndev);
1791 struct netcp_intf_modpriv *intf_modpriv;
1792 struct netcp_module *module;
1793 int err = 0;
1794
1795 dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid);
1796
1797 mutex_lock(&netcp_modules_lock);
1798 for_each_module(netcp, intf_modpriv) {
1799 module = intf_modpriv->netcp_module;
1800 if (module->del_vid) {
1801 err = module->del_vid(intf_modpriv->module_priv, vid);
1802 if (err != 0) {
1803 dev_err(netcp->ndev_dev, "Could not delete vlan id = %d\n",
1804 vid);
1805 break;
1806 }
1807 }
1808 }
1809 mutex_unlock(&netcp_modules_lock);
1810 return err;
1811}
1812
1813static u16 netcp_select_queue(struct net_device *dev, struct sk_buff *skb,
1814 void *accel_priv,
1815 select_queue_fallback_t fallback)
1816{
1817 return 0;
1818}
1819
1820static int netcp_setup_tc(struct net_device *dev, u8 num_tc)
1821{
1822 int i;
1823
1824 /* setup tc must be called under rtnl lock */
1825 ASSERT_RTNL();
1826
1827 /* Sanity-check the number of traffic classes requested */
1828 if ((dev->real_num_tx_queues <= 1) ||
1829 (dev->real_num_tx_queues < num_tc))
1830 return -EINVAL;
1831
1832 /* Configure traffic class to queue mappings */
1833 if (num_tc) {
1834 netdev_set_num_tc(dev, num_tc);
1835 for (i = 0; i < num_tc; i++)
1836 netdev_set_tc_queue(dev, i, 1, i);
1837 } else {
1838 netdev_reset_tc(dev);
1839 }
1840
1841 return 0;
1842}
1843
1844static const struct net_device_ops netcp_netdev_ops = {
1845 .ndo_open = netcp_ndo_open,
1846 .ndo_stop = netcp_ndo_stop,
1847 .ndo_start_xmit = netcp_ndo_start_xmit,
1848 .ndo_set_rx_mode = netcp_set_rx_mode,
1849 .ndo_do_ioctl = netcp_ndo_ioctl,
1850 .ndo_change_mtu = netcp_ndo_change_mtu,
1851 .ndo_set_mac_address = eth_mac_addr,
1852 .ndo_validate_addr = eth_validate_addr,
1853 .ndo_vlan_rx_add_vid = netcp_rx_add_vid,
1854 .ndo_vlan_rx_kill_vid = netcp_rx_kill_vid,
1855 .ndo_tx_timeout = netcp_ndo_tx_timeout,
1856 .ndo_select_queue = netcp_select_queue,
1857 .ndo_setup_tc = netcp_setup_tc,
1858};
1859
1860static int netcp_create_interface(struct netcp_device *netcp_device,
1861 struct device_node *node_interface)
1862{
1863 struct device *dev = netcp_device->device;
1864 struct device_node *node = dev->of_node;
1865 struct netcp_intf *netcp;
1866 struct net_device *ndev;
1867 resource_size_t size;
1868 struct resource res;
1869 void __iomem *efuse = NULL;
1870 u32 efuse_mac = 0;
1871 const void *mac_addr;
1872 u8 efuse_mac_addr[6];
1873 u32 temp[2];
1874 int ret = 0;
1875
1876 ndev = alloc_etherdev_mqs(sizeof(*netcp), 1, 1);
1877 if (!ndev) {
1878 dev_err(dev, "Error allocating netdev\n");
1879 return -ENOMEM;
1880 }
1881
1882 ndev->features |= NETIF_F_SG;
1883 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1884 ndev->hw_features = ndev->features;
1885 ndev->vlan_features |= NETIF_F_SG;
1886
1887 netcp = netdev_priv(ndev);
1888 spin_lock_init(&netcp->lock);
1889 INIT_LIST_HEAD(&netcp->module_head);
1890 INIT_LIST_HEAD(&netcp->txhook_list_head);
1891 INIT_LIST_HEAD(&netcp->rxhook_list_head);
1892 INIT_LIST_HEAD(&netcp->addr_list);
1893 netcp->netcp_device = netcp_device;
1894 netcp->dev = netcp_device->device;
1895 netcp->ndev = ndev;
1896 netcp->ndev_dev = &ndev->dev;
1897 netcp->msg_enable = netif_msg_init(netcp_debug_level, NETCP_DEBUG);
1898 netcp->tx_pause_threshold = MAX_SKB_FRAGS;
1899 netcp->tx_resume_threshold = netcp->tx_pause_threshold;
1900 netcp->node_interface = node_interface;
1901
1902 ret = of_property_read_u32(node_interface, "efuse-mac", &efuse_mac);
1903 if (efuse_mac) {
1904 if (of_address_to_resource(node, NETCP_EFUSE_REG_INDEX, &res)) {
1905 dev_err(dev, "could not find efuse-mac reg resource\n");
1906 ret = -ENODEV;
1907 goto quit;
1908 }
1909 size = resource_size(&res);
1910
1911 if (!devm_request_mem_region(dev, res.start, size,
1912 dev_name(dev))) {
1913 dev_err(dev, "could not reserve resource\n");
1914 ret = -ENOMEM;
1915 goto quit;
1916 }
1917
1918 efuse = devm_ioremap_nocache(dev, res.start, size);
1919 if (!efuse) {
1920 dev_err(dev, "could not map resource\n");
1921 devm_release_mem_region(dev, res.start, size);
1922 ret = -ENOMEM;
1923 goto quit;
1924 }
1925
71382bc0 1926 emac_arch_get_mac_addr(efuse_mac_addr, efuse, efuse_mac);
84640e27
KM		 1927 if (is_valid_ether_addr(efuse_mac_addr))
1928 ether_addr_copy(ndev->dev_addr, efuse_mac_addr);
1929 else
1930 random_ether_addr(ndev->dev_addr);
1931
1932 devm_iounmap(dev, efuse);
1933 devm_release_mem_region(dev, res.start, size);
1934 } else {
1935 mac_addr = of_get_mac_address(node_interface);
1936 if (mac_addr)
1937 ether_addr_copy(ndev->dev_addr, mac_addr);
1938 else
1939 random_ether_addr(ndev->dev_addr);
1940 }
1941
1942 ret = of_property_read_string(node_interface, "rx-channel",
1943 &netcp->dma_chan_name);
1944 if (ret < 0) {
1945 dev_err(dev, "missing \"rx-channel\" parameter\n");
1946 ret = -ENODEV;
1947 goto quit;
1948 }
1949
1950 ret = of_property_read_u32(node_interface, "rx-queue",
1951 &netcp->rx_queue_id);
1952 if (ret < 0) {
1953 dev_warn(dev, "missing \"rx-queue\" parameter\n");
1954 netcp->rx_queue_id = KNAV_QUEUE_QPEND;
1955 }
1956
1957 ret = of_property_read_u32_array(node_interface, "rx-queue-depth",
1958 netcp->rx_queue_depths,
1959 KNAV_DMA_FDQ_PER_CHAN);
1960 if (ret < 0) {
1961 dev_err(dev, "missing \"rx-queue-depth\" parameter\n");
1962 netcp->rx_queue_depths[0] = 128;
1963 }
1964
84640e27
KM		 1965 ret = of_property_read_u32_array(node_interface, "rx-pool", temp, 2);
1966 if (ret < 0) {
1967 dev_err(dev, "missing \"rx-pool\" parameter\n");
1968 ret = -ENODEV;
1969 goto quit;
1970 }
1971 netcp->rx_pool_size = temp[0];
1972 netcp->rx_pool_region_id = temp[1];
1973
1974 ret = of_property_read_u32_array(node_interface, "tx-pool", temp, 2);
1975 if (ret < 0) {
1976 dev_err(dev, "missing \"tx-pool\" parameter\n");
1977 ret = -ENODEV;
1978 goto quit;
1979 }
1980 netcp->tx_pool_size = temp[0];
1981 netcp->tx_pool_region_id = temp[1];
1982
1983 if (netcp->tx_pool_size < MAX_SKB_FRAGS) {
1984 dev_err(dev, "tx-pool size too small, must be atleast(%ld)\n",
1985 MAX_SKB_FRAGS);
1986 ret = -ENODEV;
1987 goto quit;
1988 }
1989
1990 ret = of_property_read_u32(node_interface, "tx-completion-queue",
1991 &netcp->tx_compl_qid);
1992 if (ret < 0) {
1993 dev_warn(dev, "missing \"tx-completion-queue\" parameter\n");
1994 netcp->tx_compl_qid = KNAV_QUEUE_QPEND;
1995 }
1996
1997 /* NAPI register */
1998 netif_napi_add(ndev, &netcp->rx_napi, netcp_rx_poll, NETCP_NAPI_WEIGHT);
1999 netif_napi_add(ndev, &netcp->tx_napi, netcp_tx_poll, NETCP_NAPI_WEIGHT);
2000
2001 /* Register the network device */
2002 ndev->dev_id = 0;
2003 ndev->watchdog_timeo = NETCP_TX_TIMEOUT;
2004 ndev->netdev_ops = &netcp_netdev_ops;
2005 SET_NETDEV_DEV(ndev, dev);
2006
2007 list_add_tail(&netcp->interface_list, &netcp_device->interface_head);
2008 return 0;
2009
2010quit:
2011 free_netdev(ndev);
2012 return ret;
2013}
2014
2015static void netcp_delete_interface(struct netcp_device *netcp_device,
2016 struct net_device *ndev)
2017{
2018 struct netcp_intf_modpriv *intf_modpriv, *tmp;
2019 struct netcp_intf *netcp = netdev_priv(ndev);
2020 struct netcp_module *module;
2021
2022 dev_dbg(netcp_device->device, "Removing interface \"%s\"\n",
2023 ndev->name);
2024
2025 /* Notify each of the modules that the interface is going away */
2026 list_for_each_entry_safe(intf_modpriv, tmp, &netcp->module_head,
2027 intf_list) {
2028 module = intf_modpriv->netcp_module;
2029 dev_dbg(netcp_device->device, "Releasing module \"%s\"\n",
2030 module->name);
2031 if (module->release)
2032 module->release(intf_modpriv->module_priv);
2033 list_del(&intf_modpriv->intf_list);
2034 kfree(intf_modpriv);
2035 }
2036 WARN(!list_empty(&netcp->module_head), "%s interface module list is not empty!\n",
2037 ndev->name);
2038
2039 list_del(&netcp->interface_list);
2040
2041 of_node_put(netcp->node_interface);
2042 unregister_netdev(ndev);
2043 netif_napi_del(&netcp->rx_napi);
2044 free_netdev(ndev);
2045}
2046
2047static int netcp_probe(struct platform_device *pdev)
2048{
2049 struct device_node *node = pdev->dev.of_node;
2050 struct netcp_intf *netcp_intf, *netcp_tmp;
2051 struct device_node *child, *interfaces;
2052 struct netcp_device *netcp_device;
2053 struct device *dev = &pdev->dev;
84640e27
KM		 2054 int ret;
2055
2056 if (!node) {
2057 dev_err(dev, "could not find device info\n");
2058 return -ENODEV;
2059 }
2060
2061 /* Allocate a new NETCP device instance */
2062 netcp_device = devm_kzalloc(dev, sizeof(*netcp_device), GFP_KERNEL);
2063 if (!netcp_device)
2064 return -ENOMEM;
2065
2066 pm_runtime_enable(&pdev->dev);
2067 ret = pm_runtime_get_sync(&pdev->dev);
2068 if (ret < 0) {
2069 dev_err(dev, "Failed to enable NETCP power-domain\n");
2070 pm_runtime_disable(&pdev->dev);
2071 return ret;
2072 }
2073
2074 /* Initialize the NETCP device instance */
2075 INIT_LIST_HEAD(&netcp_device->interface_head);
2076 INIT_LIST_HEAD(&netcp_device->modpriv_head);
2077 netcp_device->device = dev;
2078 platform_set_drvdata(pdev, netcp_device);
2079
2080 /* create interfaces */
2081 interfaces = of_get_child_by_name(node, "netcp-interfaces");
2082 if (!interfaces) {
2083 dev_err(dev, "could not find netcp-interfaces node\n");
2084 ret = -ENODEV;
2085 goto probe_quit;
2086 }
2087
2088 for_each_available_child_of_node(interfaces, child) {
2089 ret = netcp_create_interface(netcp_device, child);
2090 if (ret) {
2091 dev_err(dev, "could not create interface(%s)\n",
2092 child->name);
2093 goto probe_quit_interface;
2094 }
2095 }
2096
2097 /* Add the device instance to the list */
2098 list_add_tail(&netcp_device->device_list, &netcp_devices);
2099
84640e27
KM		 2100 return 0;
2101
2102probe_quit_interface:
2103 list_for_each_entry_safe(netcp_intf, netcp_tmp,
2104 &netcp_device->interface_head,
2105 interface_list) {
2106 netcp_delete_interface(netcp_device, netcp_intf->ndev);
2107 }
2108
2109probe_quit:
2110 pm_runtime_put_sync(&pdev->dev);
2111 pm_runtime_disable(&pdev->dev);
2112 platform_set_drvdata(pdev, NULL);
2113 return ret;
2114}
2115
2116static int netcp_remove(struct platform_device *pdev)
2117{
2118 struct netcp_device *netcp_device = platform_get_drvdata(pdev);
01a03099 2119 struct netcp_intf *netcp_intf, *netcp_tmp;
84640e27
KM		 2120 struct netcp_inst_modpriv *inst_modpriv, *tmp;
2121 struct netcp_module *module;
2122
2123 list_for_each_entry_safe(inst_modpriv, tmp, &netcp_device->modpriv_head,
2124 inst_list) {
2125 module = inst_modpriv->netcp_module;
2126 dev_dbg(&pdev->dev, "Removing module \"%s\"\n", module->name);
2127 module->remove(netcp_device, inst_modpriv->module_priv);
2128 list_del(&inst_modpriv->inst_list);
2129 kfree(inst_modpriv);
2130 }
84640e27 2131
01a03099
KM		 2132 /* now that all modules are removed, clean up the interfaces */
2133 list_for_each_entry_safe(netcp_intf, netcp_tmp,
2134 &netcp_device->interface_head,
2135 interface_list) {
2136 netcp_delete_interface(netcp_device, netcp_intf->ndev);
2137 }
2138
2139 WARN(!list_empty(&netcp_device->interface_head),
2140 "%s interface list not empty!\n", pdev->name);
84640e27 2141
84640e27
KM		 2142 pm_runtime_put_sync(&pdev->dev);
2143 pm_runtime_disable(&pdev->dev);
2144 platform_set_drvdata(pdev, NULL);
2145 return 0;
2146}
2147
1156c965 2148static const struct of_device_id of_match[] = {
84640e27
KM		 2149 { .compatible = "ti,netcp-1.0", },
2150 {},
2151};
2152MODULE_DEVICE_TABLE(of, of_match);
2153
2154static struct platform_driver netcp_driver = {
2155 .driver = {
2156 .name = "netcp-1.0",
84640e27
KM		 2157 .of_match_table = of_match,
2158 },
2159 .probe = netcp_probe,
2160 .remove = netcp_remove,
2161};
2162module_platform_driver(netcp_driver);
2163
2164MODULE_LICENSE("GPL v2");
2165MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs");
2166MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com");
Linux kernel - Deliverables
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