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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 */ | |
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 | static LIST_HEAD(netcp_devices); | |
104 | static LIST_HEAD(netcp_modules); | |
105 | static DEFINE_MUTEX(netcp_modules_lock); | |
106 | ||
107 | static int netcp_debug_level = -1; | |
108 | module_param(netcp_debug_level, int, 0); | |
109 | MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)"); | |
110 | ||
111 | /* Helper functions - Get/Set */ | |
89907779 | 112 | static void get_pkt_info(dma_addr_t *buff, u32 *buff_len, dma_addr_t *ndesc, |
84640e27 KM |
113 | struct knav_dma_desc *desc) |
114 | { | |
89907779 AB |
115 | *buff_len = le32_to_cpu(desc->buff_len); |
116 | *buff = le32_to_cpu(desc->buff); | |
117 | *ndesc = le32_to_cpu(desc->next_desc); | |
84640e27 KM |
118 | } |
119 | ||
06324481 | 120 | static u32 get_sw_data(int index, struct knav_dma_desc *desc) |
84640e27 | 121 | { |
b1cb86ae | 122 | /* No Endian conversion needed as this data is untouched by hw */ |
06324481 | 123 | return desc->sw_data[index]; |
84640e27 KM |
124 | } |
125 | ||
06324481 KM |
126 | /* use these macros to get sw data */ |
127 | #define GET_SW_DATA0(desc) get_sw_data(0, desc) | |
128 | #define GET_SW_DATA1(desc) get_sw_data(1, desc) | |
129 | #define GET_SW_DATA2(desc) get_sw_data(2, desc) | |
130 | #define GET_SW_DATA3(desc) get_sw_data(3, desc) | |
89907779 AB |
131 | |
132 | static void get_org_pkt_info(dma_addr_t *buff, u32 *buff_len, | |
84640e27 KM |
133 | struct knav_dma_desc *desc) |
134 | { | |
89907779 AB |
135 | *buff = le32_to_cpu(desc->orig_buff); |
136 | *buff_len = le32_to_cpu(desc->orig_len); | |
84640e27 KM |
137 | } |
138 | ||
89907779 | 139 | static void get_words(dma_addr_t *words, int num_words, __le32 *desc) |
84640e27 KM |
140 | { |
141 | int i; | |
142 | ||
143 | for (i = 0; i < num_words; i++) | |
89907779 | 144 | words[i] = le32_to_cpu(desc[i]); |
84640e27 KM |
145 | } |
146 | ||
89907779 | 147 | static void set_pkt_info(dma_addr_t buff, u32 buff_len, u32 ndesc, |
84640e27 KM |
148 | struct knav_dma_desc *desc) |
149 | { | |
89907779 AB |
150 | desc->buff_len = cpu_to_le32(buff_len); |
151 | desc->buff = cpu_to_le32(buff); | |
152 | desc->next_desc = cpu_to_le32(ndesc); | |
84640e27 KM |
153 | } |
154 | ||
155 | static void set_desc_info(u32 desc_info, u32 pkt_info, | |
156 | struct knav_dma_desc *desc) | |
157 | { | |
89907779 AB |
158 | desc->desc_info = cpu_to_le32(desc_info); |
159 | desc->packet_info = cpu_to_le32(pkt_info); | |
84640e27 KM |
160 | } |
161 | ||
06324481 | 162 | static void set_sw_data(int index, u32 data, struct knav_dma_desc *desc) |
84640e27 | 163 | { |
b1cb86ae | 164 | /* No Endian conversion needed as this data is untouched by hw */ |
06324481 | 165 | desc->sw_data[index] = data; |
84640e27 KM |
166 | } |
167 | ||
06324481 KM |
168 | /* use these macros to set sw data */ |
169 | #define SET_SW_DATA0(data, desc) set_sw_data(0, data, desc) | |
170 | #define SET_SW_DATA1(data, desc) set_sw_data(1, data, desc) | |
171 | #define SET_SW_DATA2(data, desc) set_sw_data(2, data, desc) | |
172 | #define SET_SW_DATA3(data, desc) set_sw_data(3, data, desc) | |
173 | ||
89907779 | 174 | static void set_org_pkt_info(dma_addr_t buff, u32 buff_len, |
84640e27 KM |
175 | struct knav_dma_desc *desc) |
176 | { | |
89907779 AB |
177 | desc->orig_buff = cpu_to_le32(buff); |
178 | desc->orig_len = cpu_to_le32(buff_len); | |
84640e27 KM |
179 | } |
180 | ||
89907779 | 181 | static void set_words(u32 *words, int num_words, __le32 *desc) |
84640e27 KM |
182 | { |
183 | int i; | |
184 | ||
185 | for (i = 0; i < num_words; i++) | |
89907779 | 186 | desc[i] = cpu_to_le32(words[i]); |
84640e27 KM |
187 | } |
188 | ||
189 | /* Read the e-fuse value as 32 bit values to be endian independent */ | |
71382bc0 | 190 | static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac, u32 swap) |
84640e27 KM |
191 | { |
192 | unsigned int addr0, addr1; | |
193 | ||
194 | addr1 = readl(efuse_mac + 4); | |
195 | addr0 = readl(efuse_mac); | |
196 | ||
71382bc0 WK |
197 | switch (swap) { |
198 | case NETCP_EFUSE_ADDR_SWAP: | |
199 | addr0 = addr1; | |
200 | addr1 = readl(efuse_mac); | |
201 | break; | |
202 | default: | |
203 | break; | |
204 | } | |
205 | ||
84640e27 KM |
206 | x[0] = (addr1 & 0x0000ff00) >> 8; |
207 | x[1] = addr1 & 0x000000ff; | |
208 | x[2] = (addr0 & 0xff000000) >> 24; | |
209 | x[3] = (addr0 & 0x00ff0000) >> 16; | |
210 | x[4] = (addr0 & 0x0000ff00) >> 8; | |
211 | x[5] = addr0 & 0x000000ff; | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | static const char *netcp_node_name(struct device_node *node) | |
217 | { | |
218 | const char *name; | |
219 | ||
220 | if (of_property_read_string(node, "label", &name) < 0) | |
221 | name = node->name; | |
222 | if (!name) | |
223 | name = "unknown"; | |
224 | return name; | |
225 | } | |
226 | ||
227 | /* Module management routines */ | |
228 | static int netcp_register_interface(struct netcp_intf *netcp) | |
229 | { | |
230 | int ret; | |
231 | ||
232 | ret = register_netdev(netcp->ndev); | |
233 | if (!ret) | |
234 | netcp->netdev_registered = true; | |
235 | return ret; | |
236 | } | |
237 | ||
238 | static int netcp_module_probe(struct netcp_device *netcp_device, | |
239 | struct netcp_module *module) | |
240 | { | |
241 | struct device *dev = netcp_device->device; | |
242 | struct device_node *devices, *interface, *node = dev->of_node; | |
243 | struct device_node *child; | |
244 | struct netcp_inst_modpriv *inst_modpriv; | |
245 | struct netcp_intf *netcp_intf; | |
246 | struct netcp_module *tmp; | |
247 | bool primary_module_registered = false; | |
248 | int ret; | |
249 | ||
250 | /* Find this module in the sub-tree for this device */ | |
251 | devices = of_get_child_by_name(node, "netcp-devices"); | |
252 | if (!devices) { | |
253 | dev_err(dev, "could not find netcp-devices node\n"); | |
254 | return NETCP_MOD_PROBE_SKIPPED; | |
255 | } | |
256 | ||
257 | for_each_available_child_of_node(devices, child) { | |
258 | const char *name = netcp_node_name(child); | |
259 | ||
260 | if (!strcasecmp(module->name, name)) | |
261 | break; | |
262 | } | |
263 | ||
264 | of_node_put(devices); | |
265 | /* If module not used for this device, skip it */ | |
266 | if (!child) { | |
267 | dev_warn(dev, "module(%s) not used for device\n", module->name); | |
268 | return NETCP_MOD_PROBE_SKIPPED; | |
269 | } | |
270 | ||
271 | inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL); | |
272 | if (!inst_modpriv) { | |
273 | of_node_put(child); | |
274 | return -ENOMEM; | |
275 | } | |
276 | ||
277 | inst_modpriv->netcp_device = netcp_device; | |
278 | inst_modpriv->netcp_module = module; | |
279 | list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head); | |
280 | ||
281 | ret = module->probe(netcp_device, dev, child, | |
282 | &inst_modpriv->module_priv); | |
283 | of_node_put(child); | |
284 | if (ret) { | |
285 | dev_err(dev, "Probe of module(%s) failed with %d\n", | |
286 | module->name, ret); | |
287 | list_del(&inst_modpriv->inst_list); | |
288 | devm_kfree(dev, inst_modpriv); | |
289 | return NETCP_MOD_PROBE_FAILED; | |
290 | } | |
291 | ||
292 | /* Attach modules only if the primary module is probed */ | |
293 | for_each_netcp_module(tmp) { | |
294 | if (tmp->primary) | |
295 | primary_module_registered = true; | |
296 | } | |
297 | ||
298 | if (!primary_module_registered) | |
299 | return 0; | |
300 | ||
301 | /* Attach module to interfaces */ | |
302 | list_for_each_entry(netcp_intf, &netcp_device->interface_head, | |
303 | interface_list) { | |
304 | struct netcp_intf_modpriv *intf_modpriv; | |
305 | ||
84640e27 KM |
306 | intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv), |
307 | GFP_KERNEL); | |
308 | if (!intf_modpriv) | |
309 | return -ENOMEM; | |
310 | ||
311 | interface = of_parse_phandle(netcp_intf->node_interface, | |
312 | module->name, 0); | |
313 | ||
915c5857 KM |
314 | if (!interface) { |
315 | devm_kfree(dev, intf_modpriv); | |
316 | continue; | |
317 | } | |
318 | ||
84640e27 KM |
319 | intf_modpriv->netcp_priv = netcp_intf; |
320 | intf_modpriv->netcp_module = module; | |
321 | list_add_tail(&intf_modpriv->intf_list, | |
322 | &netcp_intf->module_head); | |
323 | ||
324 | ret = module->attach(inst_modpriv->module_priv, | |
325 | netcp_intf->ndev, interface, | |
326 | &intf_modpriv->module_priv); | |
327 | of_node_put(interface); | |
328 | if (ret) { | |
329 | dev_dbg(dev, "Attach of module %s declined with %d\n", | |
330 | module->name, ret); | |
331 | list_del(&intf_modpriv->intf_list); | |
332 | devm_kfree(dev, intf_modpriv); | |
333 | continue; | |
334 | } | |
335 | } | |
736532a0 KM |
336 | |
337 | /* Now register the interface with netdev */ | |
338 | list_for_each_entry(netcp_intf, | |
339 | &netcp_device->interface_head, | |
340 | interface_list) { | |
341 | /* If interface not registered then register now */ | |
342 | if (!netcp_intf->netdev_registered) { | |
343 | ret = netcp_register_interface(netcp_intf); | |
344 | if (ret) | |
345 | return -ENODEV; | |
346 | } | |
347 | } | |
84640e27 KM |
348 | return 0; |
349 | } | |
350 | ||
351 | int netcp_register_module(struct netcp_module *module) | |
352 | { | |
353 | struct netcp_device *netcp_device; | |
354 | struct netcp_module *tmp; | |
355 | int ret; | |
356 | ||
357 | if (!module->name) { | |
358 | WARN(1, "error registering netcp module: no name\n"); | |
359 | return -EINVAL; | |
360 | } | |
361 | ||
362 | if (!module->probe) { | |
363 | WARN(1, "error registering netcp module: no probe\n"); | |
364 | return -EINVAL; | |
365 | } | |
366 | ||
367 | mutex_lock(&netcp_modules_lock); | |
368 | ||
369 | for_each_netcp_module(tmp) { | |
370 | if (!strcasecmp(tmp->name, module->name)) { | |
371 | mutex_unlock(&netcp_modules_lock); | |
372 | return -EEXIST; | |
373 | } | |
374 | } | |
375 | list_add_tail(&module->module_list, &netcp_modules); | |
376 | ||
377 | list_for_each_entry(netcp_device, &netcp_devices, device_list) { | |
378 | ret = netcp_module_probe(netcp_device, module); | |
379 | if (ret < 0) | |
380 | goto fail; | |
381 | } | |
84640e27 KM |
382 | mutex_unlock(&netcp_modules_lock); |
383 | return 0; | |
384 | ||
385 | fail: | |
386 | mutex_unlock(&netcp_modules_lock); | |
387 | netcp_unregister_module(module); | |
388 | return ret; | |
389 | } | |
58c11b5f | 390 | EXPORT_SYMBOL_GPL(netcp_register_module); |
84640e27 KM |
391 | |
392 | static void netcp_release_module(struct netcp_device *netcp_device, | |
393 | struct netcp_module *module) | |
394 | { | |
395 | struct netcp_inst_modpriv *inst_modpriv, *inst_tmp; | |
396 | struct netcp_intf *netcp_intf, *netcp_tmp; | |
397 | struct device *dev = netcp_device->device; | |
398 | ||
399 | /* Release the module from each interface */ | |
400 | list_for_each_entry_safe(netcp_intf, netcp_tmp, | |
401 | &netcp_device->interface_head, | |
402 | interface_list) { | |
403 | struct netcp_intf_modpriv *intf_modpriv, *intf_tmp; | |
404 | ||
405 | list_for_each_entry_safe(intf_modpriv, intf_tmp, | |
406 | &netcp_intf->module_head, | |
407 | intf_list) { | |
408 | if (intf_modpriv->netcp_module == module) { | |
409 | module->release(intf_modpriv->module_priv); | |
410 | list_del(&intf_modpriv->intf_list); | |
411 | devm_kfree(dev, intf_modpriv); | |
412 | break; | |
413 | } | |
414 | } | |
415 | } | |
416 | ||
417 | /* Remove the module from each instance */ | |
418 | list_for_each_entry_safe(inst_modpriv, inst_tmp, | |
419 | &netcp_device->modpriv_head, inst_list) { | |
420 | if (inst_modpriv->netcp_module == module) { | |
421 | module->remove(netcp_device, | |
422 | inst_modpriv->module_priv); | |
423 | list_del(&inst_modpriv->inst_list); | |
424 | devm_kfree(dev, inst_modpriv); | |
425 | break; | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
430 | void netcp_unregister_module(struct netcp_module *module) | |
431 | { | |
432 | struct netcp_device *netcp_device; | |
433 | struct netcp_module *module_tmp; | |
434 | ||
435 | mutex_lock(&netcp_modules_lock); | |
436 | ||
437 | list_for_each_entry(netcp_device, &netcp_devices, device_list) { | |
438 | netcp_release_module(netcp_device, module); | |
439 | } | |
440 | ||
441 | /* Remove the module from the module list */ | |
442 | for_each_netcp_module(module_tmp) { | |
443 | if (module == module_tmp) { | |
444 | list_del(&module->module_list); | |
445 | break; | |
446 | } | |
447 | } | |
448 | ||
449 | mutex_unlock(&netcp_modules_lock); | |
450 | } | |
58c11b5f | 451 | EXPORT_SYMBOL_GPL(netcp_unregister_module); |
84640e27 KM |
452 | |
453 | void *netcp_module_get_intf_data(struct netcp_module *module, | |
454 | struct netcp_intf *intf) | |
455 | { | |
456 | struct netcp_intf_modpriv *intf_modpriv; | |
457 | ||
458 | list_for_each_entry(intf_modpriv, &intf->module_head, intf_list) | |
459 | if (intf_modpriv->netcp_module == module) | |
460 | return intf_modpriv->module_priv; | |
461 | return NULL; | |
462 | } | |
58c11b5f | 463 | EXPORT_SYMBOL_GPL(netcp_module_get_intf_data); |
84640e27 KM |
464 | |
465 | /* Module TX and RX Hook management */ | |
466 | struct netcp_hook_list { | |
467 | struct list_head list; | |
468 | netcp_hook_rtn *hook_rtn; | |
469 | void *hook_data; | |
470 | int order; | |
471 | }; | |
472 | ||
473 | int netcp_register_txhook(struct netcp_intf *netcp_priv, int order, | |
474 | netcp_hook_rtn *hook_rtn, void *hook_data) | |
475 | { | |
476 | struct netcp_hook_list *entry; | |
477 | struct netcp_hook_list *next; | |
478 | unsigned long flags; | |
479 | ||
480 | entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL); | |
481 | if (!entry) | |
482 | return -ENOMEM; | |
483 | ||
484 | entry->hook_rtn = hook_rtn; | |
485 | entry->hook_data = hook_data; | |
486 | entry->order = order; | |
487 | ||
488 | spin_lock_irqsave(&netcp_priv->lock, flags); | |
489 | list_for_each_entry(next, &netcp_priv->txhook_list_head, list) { | |
490 | if (next->order > order) | |
491 | break; | |
492 | } | |
493 | __list_add(&entry->list, next->list.prev, &next->list); | |
494 | spin_unlock_irqrestore(&netcp_priv->lock, flags); | |
495 | ||
496 | return 0; | |
497 | } | |
58c11b5f | 498 | EXPORT_SYMBOL_GPL(netcp_register_txhook); |
84640e27 KM |
499 | |
500 | int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order, | |
501 | netcp_hook_rtn *hook_rtn, void *hook_data) | |
502 | { | |
503 | struct netcp_hook_list *next, *n; | |
504 | unsigned long flags; | |
505 | ||
506 | spin_lock_irqsave(&netcp_priv->lock, flags); | |
507 | list_for_each_entry_safe(next, n, &netcp_priv->txhook_list_head, list) { | |
508 | if ((next->order == order) && | |
509 | (next->hook_rtn == hook_rtn) && | |
510 | (next->hook_data == hook_data)) { | |
511 | list_del(&next->list); | |
512 | spin_unlock_irqrestore(&netcp_priv->lock, flags); | |
513 | devm_kfree(netcp_priv->dev, next); | |
514 | return 0; | |
515 | } | |
516 | } | |
517 | spin_unlock_irqrestore(&netcp_priv->lock, flags); | |
518 | return -ENOENT; | |
519 | } | |
58c11b5f | 520 | EXPORT_SYMBOL_GPL(netcp_unregister_txhook); |
84640e27 KM |
521 | |
522 | int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order, | |
523 | netcp_hook_rtn *hook_rtn, void *hook_data) | |
524 | { | |
525 | struct netcp_hook_list *entry; | |
526 | struct netcp_hook_list *next; | |
527 | unsigned long flags; | |
528 | ||
529 | entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL); | |
530 | if (!entry) | |
531 | return -ENOMEM; | |
532 | ||
533 | entry->hook_rtn = hook_rtn; | |
534 | entry->hook_data = hook_data; | |
535 | entry->order = order; | |
536 | ||
537 | spin_lock_irqsave(&netcp_priv->lock, flags); | |
538 | list_for_each_entry(next, &netcp_priv->rxhook_list_head, list) { | |
539 | if (next->order > order) | |
540 | break; | |
541 | } | |
542 | __list_add(&entry->list, next->list.prev, &next->list); | |
543 | spin_unlock_irqrestore(&netcp_priv->lock, flags); | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order, | |
549 | netcp_hook_rtn *hook_rtn, void *hook_data) | |
550 | { | |
551 | struct netcp_hook_list *next, *n; | |
552 | unsigned long flags; | |
553 | ||
554 | spin_lock_irqsave(&netcp_priv->lock, flags); | |
555 | list_for_each_entry_safe(next, n, &netcp_priv->rxhook_list_head, list) { | |
556 | if ((next->order == order) && | |
557 | (next->hook_rtn == hook_rtn) && | |
558 | (next->hook_data == hook_data)) { | |
559 | list_del(&next->list); | |
560 | spin_unlock_irqrestore(&netcp_priv->lock, flags); | |
561 | devm_kfree(netcp_priv->dev, next); | |
562 | return 0; | |
563 | } | |
564 | } | |
565 | spin_unlock_irqrestore(&netcp_priv->lock, flags); | |
566 | ||
567 | return -ENOENT; | |
568 | } | |
569 | ||
570 | static void netcp_frag_free(bool is_frag, void *ptr) | |
571 | { | |
572 | if (is_frag) | |
7d525c4e | 573 | skb_free_frag(ptr); |
84640e27 KM |
574 | else |
575 | kfree(ptr); | |
576 | } | |
577 | ||
578 | static void netcp_free_rx_desc_chain(struct netcp_intf *netcp, | |
579 | struct knav_dma_desc *desc) | |
580 | { | |
581 | struct knav_dma_desc *ndesc; | |
582 | dma_addr_t dma_desc, dma_buf; | |
583 | unsigned int buf_len, dma_sz = sizeof(*ndesc); | |
584 | void *buf_ptr; | |
958d104e | 585 | u32 tmp; |
84640e27 KM |
586 | |
587 | get_words(&dma_desc, 1, &desc->next_desc); | |
588 | ||
589 | while (dma_desc) { | |
590 | ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz); | |
591 | if (unlikely(!ndesc)) { | |
592 | dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); | |
593 | break; | |
594 | } | |
958d104e | 595 | get_pkt_info(&dma_buf, &tmp, &dma_desc, ndesc); |
06324481 KM |
596 | /* warning!!!! We are retrieving the virtual ptr in the sw_data |
597 | * field as a 32bit value. Will not work on 64bit machines | |
598 | */ | |
599 | buf_ptr = (void *)GET_SW_DATA0(ndesc); | |
600 | buf_len = (int)GET_SW_DATA1(desc); | |
84640e27 KM |
601 | dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE); |
602 | __free_page(buf_ptr); | |
603 | knav_pool_desc_put(netcp->rx_pool, desc); | |
604 | } | |
06324481 KM |
605 | /* warning!!!! We are retrieving the virtual ptr in the sw_data |
606 | * field as a 32bit value. Will not work on 64bit machines | |
607 | */ | |
608 | buf_ptr = (void *)GET_SW_DATA0(desc); | |
609 | buf_len = (int)GET_SW_DATA1(desc); | |
89907779 | 610 | |
84640e27 KM |
611 | if (buf_ptr) |
612 | netcp_frag_free(buf_len <= PAGE_SIZE, buf_ptr); | |
613 | knav_pool_desc_put(netcp->rx_pool, desc); | |
614 | } | |
615 | ||
616 | static void netcp_empty_rx_queue(struct netcp_intf *netcp) | |
617 | { | |
618 | struct knav_dma_desc *desc; | |
619 | unsigned int dma_sz; | |
620 | dma_addr_t dma; | |
621 | ||
622 | for (; ;) { | |
623 | dma = knav_queue_pop(netcp->rx_queue, &dma_sz); | |
624 | if (!dma) | |
625 | break; | |
626 | ||
627 | desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz); | |
628 | if (unlikely(!desc)) { | |
629 | dev_err(netcp->ndev_dev, "%s: failed to unmap Rx desc\n", | |
630 | __func__); | |
631 | netcp->ndev->stats.rx_errors++; | |
632 | continue; | |
633 | } | |
634 | netcp_free_rx_desc_chain(netcp, desc); | |
635 | netcp->ndev->stats.rx_dropped++; | |
636 | } | |
637 | } | |
638 | ||
639 | static int netcp_process_one_rx_packet(struct netcp_intf *netcp) | |
640 | { | |
641 | unsigned int dma_sz, buf_len, org_buf_len; | |
642 | struct knav_dma_desc *desc, *ndesc; | |
643 | unsigned int pkt_sz = 0, accum_sz; | |
644 | struct netcp_hook_list *rx_hook; | |
645 | dma_addr_t dma_desc, dma_buff; | |
646 | struct netcp_packet p_info; | |
647 | struct sk_buff *skb; | |
648 | void *org_buf_ptr; | |
84640e27 KM |
649 | |
650 | dma_desc = knav_queue_pop(netcp->rx_queue, &dma_sz); | |
651 | if (!dma_desc) | |
652 | return -1; | |
653 | ||
654 | desc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz); | |
655 | if (unlikely(!desc)) { | |
656 | dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); | |
657 | return 0; | |
658 | } | |
659 | ||
660 | get_pkt_info(&dma_buff, &buf_len, &dma_desc, desc); | |
06324481 KM |
661 | /* warning!!!! We are retrieving the virtual ptr in the sw_data |
662 | * field as a 32bit value. Will not work on 64bit machines | |
663 | */ | |
664 | org_buf_ptr = (void *)GET_SW_DATA0(desc); | |
665 | org_buf_len = (int)GET_SW_DATA1(desc); | |
84640e27 KM |
666 | |
667 | if (unlikely(!org_buf_ptr)) { | |
668 | dev_err(netcp->ndev_dev, "NULL bufptr in desc\n"); | |
669 | goto free_desc; | |
670 | } | |
671 | ||
672 | pkt_sz &= KNAV_DMA_DESC_PKT_LEN_MASK; | |
673 | accum_sz = buf_len; | |
674 | dma_unmap_single(netcp->dev, dma_buff, buf_len, DMA_FROM_DEVICE); | |
675 | ||
676 | /* Build a new sk_buff for the primary buffer */ | |
677 | skb = build_skb(org_buf_ptr, org_buf_len); | |
678 | if (unlikely(!skb)) { | |
679 | dev_err(netcp->ndev_dev, "build_skb() failed\n"); | |
680 | goto free_desc; | |
681 | } | |
682 | ||
683 | /* update data, tail and len */ | |
684 | skb_reserve(skb, NETCP_SOP_OFFSET); | |
685 | __skb_put(skb, buf_len); | |
686 | ||
687 | /* Fill in the page fragment list */ | |
688 | while (dma_desc) { | |
689 | struct page *page; | |
690 | ||
691 | ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz); | |
692 | if (unlikely(!ndesc)) { | |
693 | dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); | |
694 | goto free_desc; | |
695 | } | |
696 | ||
697 | get_pkt_info(&dma_buff, &buf_len, &dma_desc, ndesc); | |
06324481 KM |
698 | /* warning!!!! We are retrieving the virtual ptr in the sw_data |
699 | * field as a 32bit value. Will not work on 64bit machines | |
700 | */ | |
701 | page = (struct page *)GET_SW_DATA0(desc); | |
84640e27 KM |
702 | |
703 | if (likely(dma_buff && buf_len && page)) { | |
704 | dma_unmap_page(netcp->dev, dma_buff, PAGE_SIZE, | |
705 | DMA_FROM_DEVICE); | |
706 | } else { | |
89907779 AB |
707 | dev_err(netcp->ndev_dev, "Bad Rx desc dma_buff(%pad), len(%d), page(%p)\n", |
708 | &dma_buff, buf_len, page); | |
84640e27 KM |
709 | goto free_desc; |
710 | } | |
711 | ||
712 | skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, | |
713 | offset_in_page(dma_buff), buf_len, PAGE_SIZE); | |
714 | accum_sz += buf_len; | |
715 | ||
716 | /* Free the descriptor */ | |
717 | knav_pool_desc_put(netcp->rx_pool, ndesc); | |
718 | } | |
719 | ||
720 | /* Free the primary descriptor */ | |
721 | knav_pool_desc_put(netcp->rx_pool, desc); | |
722 | ||
723 | /* check for packet len and warn */ | |
724 | if (unlikely(pkt_sz != accum_sz)) | |
725 | dev_dbg(netcp->ndev_dev, "mismatch in packet size(%d) & sum of fragments(%d)\n", | |
726 | pkt_sz, accum_sz); | |
727 | ||
728 | /* Remove ethernet FCS from the packet */ | |
729 | __pskb_trim(skb, skb->len - ETH_FCS_LEN); | |
730 | ||
731 | /* Call each of the RX hooks */ | |
732 | p_info.skb = skb; | |
733 | p_info.rxtstamp_complete = false; | |
734 | list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) { | |
735 | int ret; | |
736 | ||
737 | ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data, | |
738 | &p_info); | |
739 | if (unlikely(ret)) { | |
740 | dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n", | |
741 | rx_hook->order, ret); | |
742 | netcp->ndev->stats.rx_errors++; | |
743 | dev_kfree_skb(skb); | |
744 | return 0; | |
745 | } | |
746 | } | |
747 | ||
84640e27 KM |
748 | netcp->ndev->stats.rx_packets++; |
749 | netcp->ndev->stats.rx_bytes += skb->len; | |
750 | ||
751 | /* push skb up the stack */ | |
752 | skb->protocol = eth_type_trans(skb, netcp->ndev); | |
753 | netif_receive_skb(skb); | |
754 | return 0; | |
755 | ||
756 | free_desc: | |
757 | netcp_free_rx_desc_chain(netcp, desc); | |
758 | netcp->ndev->stats.rx_errors++; | |
759 | return 0; | |
760 | } | |
761 | ||
762 | static int netcp_process_rx_packets(struct netcp_intf *netcp, | |
763 | unsigned int budget) | |
764 | { | |
765 | int i; | |
766 | ||
767 | for (i = 0; (i < budget) && !netcp_process_one_rx_packet(netcp); i++) | |
768 | ; | |
769 | return i; | |
770 | } | |
771 | ||
772 | /* Release descriptors and attached buffers from Rx FDQ */ | |
773 | static void netcp_free_rx_buf(struct netcp_intf *netcp, int fdq) | |
774 | { | |
775 | struct knav_dma_desc *desc; | |
776 | unsigned int buf_len, dma_sz; | |
777 | dma_addr_t dma; | |
778 | void *buf_ptr; | |
84640e27 KM |
779 | |
780 | /* Allocate descriptor */ | |
781 | while ((dma = knav_queue_pop(netcp->rx_fdq[fdq], &dma_sz))) { | |
782 | desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz); | |
783 | if (unlikely(!desc)) { | |
784 | dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); | |
785 | continue; | |
786 | } | |
787 | ||
788 | get_org_pkt_info(&dma, &buf_len, desc); | |
06324481 KM |
789 | /* warning!!!! We are retrieving the virtual ptr in the sw_data |
790 | * field as a 32bit value. Will not work on 64bit machines | |
791 | */ | |
792 | buf_ptr = (void *)GET_SW_DATA0(desc); | |
84640e27 KM |
793 | |
794 | if (unlikely(!dma)) { | |
795 | dev_err(netcp->ndev_dev, "NULL orig_buff in desc\n"); | |
796 | knav_pool_desc_put(netcp->rx_pool, desc); | |
797 | continue; | |
798 | } | |
799 | ||
800 | if (unlikely(!buf_ptr)) { | |
801 | dev_err(netcp->ndev_dev, "NULL bufptr in desc\n"); | |
802 | knav_pool_desc_put(netcp->rx_pool, desc); | |
803 | continue; | |
804 | } | |
805 | ||
806 | if (fdq == 0) { | |
807 | dma_unmap_single(netcp->dev, dma, buf_len, | |
808 | DMA_FROM_DEVICE); | |
809 | netcp_frag_free((buf_len <= PAGE_SIZE), buf_ptr); | |
810 | } else { | |
811 | dma_unmap_page(netcp->dev, dma, buf_len, | |
812 | DMA_FROM_DEVICE); | |
813 | __free_page(buf_ptr); | |
814 | } | |
815 | ||
816 | knav_pool_desc_put(netcp->rx_pool, desc); | |
817 | } | |
818 | } | |
819 | ||
820 | static void netcp_rxpool_free(struct netcp_intf *netcp) | |
821 | { | |
822 | int i; | |
823 | ||
824 | for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && | |
825 | !IS_ERR_OR_NULL(netcp->rx_fdq[i]); i++) | |
826 | netcp_free_rx_buf(netcp, i); | |
827 | ||
828 | if (knav_pool_count(netcp->rx_pool) != netcp->rx_pool_size) | |
829 | dev_err(netcp->ndev_dev, "Lost Rx (%d) descriptors\n", | |
830 | netcp->rx_pool_size - knav_pool_count(netcp->rx_pool)); | |
831 | ||
832 | knav_pool_destroy(netcp->rx_pool); | |
833 | netcp->rx_pool = NULL; | |
834 | } | |
835 | ||
e558b1fb | 836 | static int netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq) |
84640e27 KM |
837 | { |
838 | struct knav_dma_desc *hwdesc; | |
839 | unsigned int buf_len, dma_sz; | |
840 | u32 desc_info, pkt_info; | |
841 | struct page *page; | |
842 | dma_addr_t dma; | |
843 | void *bufptr; | |
b1cb86ae | 844 | u32 sw_data[2]; |
84640e27 KM |
845 | |
846 | /* Allocate descriptor */ | |
847 | hwdesc = knav_pool_desc_get(netcp->rx_pool); | |
848 | if (IS_ERR_OR_NULL(hwdesc)) { | |
849 | dev_dbg(netcp->ndev_dev, "out of rx pool desc\n"); | |
e558b1fb | 850 | return -ENOMEM; |
84640e27 KM |
851 | } |
852 | ||
853 | if (likely(fdq == 0)) { | |
854 | unsigned int primary_buf_len; | |
855 | /* Allocate a primary receive queue entry */ | |
866b8b18 | 856 | buf_len = NETCP_PACKET_SIZE + NETCP_SOP_OFFSET; |
84640e27 KM |
857 | primary_buf_len = SKB_DATA_ALIGN(buf_len) + |
858 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
859 | ||
866b8b18 | 860 | bufptr = netdev_alloc_frag(primary_buf_len); |
b1cb86ae | 861 | sw_data[1] = primary_buf_len; |
84640e27 KM |
862 | |
863 | if (unlikely(!bufptr)) { | |
866b8b18 WK |
864 | dev_warn_ratelimited(netcp->ndev_dev, |
865 | "Primary RX buffer alloc failed\n"); | |
84640e27 KM |
866 | goto fail; |
867 | } | |
868 | dma = dma_map_single(netcp->dev, bufptr, buf_len, | |
869 | DMA_TO_DEVICE); | |
866b8b18 WK |
870 | if (unlikely(dma_mapping_error(netcp->dev, dma))) |
871 | goto fail; | |
872 | ||
06324481 KM |
873 | /* warning!!!! We are saving the virtual ptr in the sw_data |
874 | * field as a 32bit value. Will not work on 64bit machines | |
875 | */ | |
b1cb86ae | 876 | sw_data[0] = (u32)bufptr; |
84640e27 KM |
877 | } else { |
878 | /* Allocate a secondary receive queue entry */ | |
866b8b18 | 879 | page = alloc_page(GFP_ATOMIC | GFP_DMA | __GFP_COLD); |
84640e27 KM |
880 | if (unlikely(!page)) { |
881 | dev_warn_ratelimited(netcp->ndev_dev, "Secondary page alloc failed\n"); | |
882 | goto fail; | |
883 | } | |
884 | buf_len = PAGE_SIZE; | |
885 | dma = dma_map_page(netcp->dev, page, 0, buf_len, DMA_TO_DEVICE); | |
06324481 KM |
886 | /* warning!!!! We are saving the virtual ptr in the sw_data |
887 | * field as a 32bit value. Will not work on 64bit machines | |
888 | */ | |
b1cb86ae KM |
889 | sw_data[0] = (u32)page; |
890 | sw_data[1] = 0; | |
84640e27 KM |
891 | } |
892 | ||
893 | desc_info = KNAV_DMA_DESC_PS_INFO_IN_DESC; | |
894 | desc_info |= buf_len & KNAV_DMA_DESC_PKT_LEN_MASK; | |
895 | pkt_info = KNAV_DMA_DESC_HAS_EPIB; | |
896 | pkt_info |= KNAV_DMA_NUM_PS_WORDS << KNAV_DMA_DESC_PSLEN_SHIFT; | |
897 | pkt_info |= (netcp->rx_queue_id & KNAV_DMA_DESC_RETQ_MASK) << | |
898 | KNAV_DMA_DESC_RETQ_SHIFT; | |
899 | set_org_pkt_info(dma, buf_len, hwdesc); | |
06324481 KM |
900 | SET_SW_DATA0(sw_data[0], hwdesc); |
901 | SET_SW_DATA1(sw_data[1], hwdesc); | |
84640e27 KM |
902 | set_desc_info(desc_info, pkt_info, hwdesc); |
903 | ||
904 | /* Push to FDQs */ | |
905 | knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma, | |
906 | &dma_sz); | |
907 | knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0); | |
e558b1fb | 908 | return 0; |
84640e27 KM |
909 | |
910 | fail: | |
911 | knav_pool_desc_put(netcp->rx_pool, hwdesc); | |
e558b1fb | 912 | return -ENOMEM; |
84640e27 KM |
913 | } |
914 | ||
915 | /* Refill Rx FDQ with descriptors & attached buffers */ | |
916 | static void netcp_rxpool_refill(struct netcp_intf *netcp) | |
917 | { | |
918 | u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0}; | |
e558b1fb | 919 | int i, ret = 0; |
84640e27 KM |
920 | |
921 | /* Calculate the FDQ deficit and refill */ | |
922 | for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) { | |
923 | fdq_deficit[i] = netcp->rx_queue_depths[i] - | |
924 | knav_queue_get_count(netcp->rx_fdq[i]); | |
925 | ||
e558b1fb KM |
926 | while (fdq_deficit[i]-- && !ret) |
927 | ret = netcp_allocate_rx_buf(netcp, i); | |
84640e27 KM |
928 | } /* end for fdqs */ |
929 | } | |
930 | ||
931 | /* NAPI poll */ | |
932 | static int netcp_rx_poll(struct napi_struct *napi, int budget) | |
933 | { | |
934 | struct netcp_intf *netcp = container_of(napi, struct netcp_intf, | |
935 | rx_napi); | |
936 | unsigned int packets; | |
937 | ||
938 | packets = netcp_process_rx_packets(netcp, budget); | |
939 | ||
99f8ef5d | 940 | netcp_rxpool_refill(netcp); |
84640e27 KM |
941 | if (packets < budget) { |
942 | napi_complete(&netcp->rx_napi); | |
943 | knav_queue_enable_notify(netcp->rx_queue); | |
944 | } | |
945 | ||
84640e27 KM |
946 | return packets; |
947 | } | |
948 | ||
949 | static void netcp_rx_notify(void *arg) | |
950 | { | |
951 | struct netcp_intf *netcp = arg; | |
952 | ||
953 | knav_queue_disable_notify(netcp->rx_queue); | |
954 | napi_schedule(&netcp->rx_napi); | |
955 | } | |
956 | ||
957 | static void netcp_free_tx_desc_chain(struct netcp_intf *netcp, | |
958 | struct knav_dma_desc *desc, | |
959 | unsigned int desc_sz) | |
960 | { | |
961 | struct knav_dma_desc *ndesc = desc; | |
962 | dma_addr_t dma_desc, dma_buf; | |
963 | unsigned int buf_len; | |
964 | ||
965 | while (ndesc) { | |
966 | get_pkt_info(&dma_buf, &buf_len, &dma_desc, ndesc); | |
967 | ||
968 | if (dma_buf && buf_len) | |
969 | dma_unmap_single(netcp->dev, dma_buf, buf_len, | |
970 | DMA_TO_DEVICE); | |
971 | else | |
89907779 AB |
972 | dev_warn(netcp->ndev_dev, "bad Tx desc buf(%pad), len(%d)\n", |
973 | &dma_buf, buf_len); | |
84640e27 KM |
974 | |
975 | knav_pool_desc_put(netcp->tx_pool, ndesc); | |
976 | ndesc = NULL; | |
977 | if (dma_desc) { | |
978 | ndesc = knav_pool_desc_unmap(netcp->tx_pool, dma_desc, | |
979 | desc_sz); | |
980 | if (!ndesc) | |
981 | dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n"); | |
982 | } | |
983 | } | |
984 | } | |
985 | ||
986 | static int netcp_process_tx_compl_packets(struct netcp_intf *netcp, | |
987 | unsigned int budget) | |
988 | { | |
989 | struct knav_dma_desc *desc; | |
990 | struct sk_buff *skb; | |
991 | unsigned int dma_sz; | |
992 | dma_addr_t dma; | |
993 | int pkts = 0; | |
84640e27 KM |
994 | |
995 | while (budget--) { | |
996 | dma = knav_queue_pop(netcp->tx_compl_q, &dma_sz); | |
997 | if (!dma) | |
998 | break; | |
999 | desc = knav_pool_desc_unmap(netcp->tx_pool, dma, dma_sz); | |
1000 | if (unlikely(!desc)) { | |
1001 | dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n"); | |
1002 | netcp->ndev->stats.tx_errors++; | |
1003 | continue; | |
1004 | } | |
1005 | ||
06324481 KM |
1006 | /* warning!!!! We are retrieving the virtual ptr in the sw_data |
1007 | * field as a 32bit value. Will not work on 64bit machines | |
1008 | */ | |
1009 | skb = (struct sk_buff *)GET_SW_DATA0(desc); | |
84640e27 KM |
1010 | netcp_free_tx_desc_chain(netcp, desc, dma_sz); |
1011 | if (!skb) { | |
1012 | dev_err(netcp->ndev_dev, "No skb in Tx desc\n"); | |
1013 | netcp->ndev->stats.tx_errors++; | |
1014 | continue; | |
1015 | } | |
1016 | ||
1017 | if (netif_subqueue_stopped(netcp->ndev, skb) && | |
1018 | netif_running(netcp->ndev) && | |
1019 | (knav_pool_count(netcp->tx_pool) > | |
1020 | netcp->tx_resume_threshold)) { | |
1021 | u16 subqueue = skb_get_queue_mapping(skb); | |
1022 | ||
1023 | netif_wake_subqueue(netcp->ndev, subqueue); | |
1024 | } | |
1025 | ||
1026 | netcp->ndev->stats.tx_packets++; | |
1027 | netcp->ndev->stats.tx_bytes += skb->len; | |
1028 | dev_kfree_skb(skb); | |
1029 | pkts++; | |
1030 | } | |
1031 | return pkts; | |
1032 | } | |
1033 | ||
1034 | static int netcp_tx_poll(struct napi_struct *napi, int budget) | |
1035 | { | |
1036 | int packets; | |
1037 | struct netcp_intf *netcp = container_of(napi, struct netcp_intf, | |
1038 | tx_napi); | |
1039 | ||
1040 | packets = netcp_process_tx_compl_packets(netcp, budget); | |
1041 | if (packets < budget) { | |
1042 | napi_complete(&netcp->tx_napi); | |
1043 | knav_queue_enable_notify(netcp->tx_compl_q); | |
1044 | } | |
1045 | ||
1046 | return packets; | |
1047 | } | |
1048 | ||
1049 | static void netcp_tx_notify(void *arg) | |
1050 | { | |
1051 | struct netcp_intf *netcp = arg; | |
1052 | ||
1053 | knav_queue_disable_notify(netcp->tx_compl_q); | |
1054 | napi_schedule(&netcp->tx_napi); | |
1055 | } | |
1056 | ||
1057 | static struct knav_dma_desc* | |
1058 | netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp) | |
1059 | { | |
1060 | struct knav_dma_desc *desc, *ndesc, *pdesc; | |
1061 | unsigned int pkt_len = skb_headlen(skb); | |
1062 | struct device *dev = netcp->dev; | |
1063 | dma_addr_t dma_addr; | |
1064 | unsigned int dma_sz; | |
1065 | int i; | |
1066 | ||
1067 | /* Map the linear buffer */ | |
1068 | dma_addr = dma_map_single(dev, skb->data, pkt_len, DMA_TO_DEVICE); | |
866b8b18 | 1069 | if (unlikely(dma_mapping_error(dev, dma_addr))) { |
84640e27 KM |
1070 | dev_err(netcp->ndev_dev, "Failed to map skb buffer\n"); |
1071 | return NULL; | |
1072 | } | |
1073 | ||
1074 | desc = knav_pool_desc_get(netcp->tx_pool); | |
bf69a3b6 | 1075 | if (IS_ERR_OR_NULL(desc)) { |
84640e27 KM |
1076 | dev_err(netcp->ndev_dev, "out of TX desc\n"); |
1077 | dma_unmap_single(dev, dma_addr, pkt_len, DMA_TO_DEVICE); | |
1078 | return NULL; | |
1079 | } | |
1080 | ||
1081 | set_pkt_info(dma_addr, pkt_len, 0, desc); | |
1082 | if (skb_is_nonlinear(skb)) { | |
1083 | prefetchw(skb_shinfo(skb)); | |
1084 | } else { | |
1085 | desc->next_desc = 0; | |
1086 | goto upd_pkt_len; | |
1087 | } | |
1088 | ||
1089 | pdesc = desc; | |
1090 | ||
1091 | /* Handle the case where skb is fragmented in pages */ | |
1092 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1093 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1094 | struct page *page = skb_frag_page(frag); | |
1095 | u32 page_offset = frag->page_offset; | |
1096 | u32 buf_len = skb_frag_size(frag); | |
1097 | dma_addr_t desc_dma; | |
89907779 | 1098 | u32 desc_dma_32; |
84640e27 KM |
1099 | u32 pkt_info; |
1100 | ||
1101 | dma_addr = dma_map_page(dev, page, page_offset, buf_len, | |
1102 | DMA_TO_DEVICE); | |
1103 | if (unlikely(!dma_addr)) { | |
1104 | dev_err(netcp->ndev_dev, "Failed to map skb page\n"); | |
1105 | goto free_descs; | |
1106 | } | |
1107 | ||
1108 | ndesc = knav_pool_desc_get(netcp->tx_pool); | |
bf69a3b6 | 1109 | if (IS_ERR_OR_NULL(ndesc)) { |
84640e27 KM |
1110 | dev_err(netcp->ndev_dev, "out of TX desc for frags\n"); |
1111 | dma_unmap_page(dev, dma_addr, buf_len, DMA_TO_DEVICE); | |
1112 | goto free_descs; | |
1113 | } | |
1114 | ||
89907779 | 1115 | desc_dma = knav_pool_desc_virt_to_dma(netcp->tx_pool, ndesc); |
84640e27 KM |
1116 | pkt_info = |
1117 | (netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) << | |
1118 | KNAV_DMA_DESC_RETQ_SHIFT; | |
1119 | set_pkt_info(dma_addr, buf_len, 0, ndesc); | |
89907779 AB |
1120 | desc_dma_32 = (u32)desc_dma; |
1121 | set_words(&desc_dma_32, 1, &pdesc->next_desc); | |
84640e27 KM |
1122 | pkt_len += buf_len; |
1123 | if (pdesc != desc) | |
1124 | knav_pool_desc_map(netcp->tx_pool, pdesc, | |
1125 | sizeof(*pdesc), &desc_dma, &dma_sz); | |
1126 | pdesc = ndesc; | |
1127 | } | |
1128 | if (pdesc != desc) | |
1129 | knav_pool_desc_map(netcp->tx_pool, pdesc, sizeof(*pdesc), | |
1130 | &dma_addr, &dma_sz); | |
1131 | ||
1132 | /* frag list based linkage is not supported for now. */ | |
1133 | if (skb_shinfo(skb)->frag_list) { | |
1134 | dev_err_ratelimited(netcp->ndev_dev, "NETIF_F_FRAGLIST not supported\n"); | |
1135 | goto free_descs; | |
1136 | } | |
1137 | ||
1138 | upd_pkt_len: | |
1139 | WARN_ON(pkt_len != skb->len); | |
1140 | ||
1141 | pkt_len &= KNAV_DMA_DESC_PKT_LEN_MASK; | |
1142 | set_words(&pkt_len, 1, &desc->desc_info); | |
1143 | return desc; | |
1144 | ||
1145 | free_descs: | |
1146 | netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc)); | |
1147 | return NULL; | |
1148 | } | |
1149 | ||
1150 | static int netcp_tx_submit_skb(struct netcp_intf *netcp, | |
1151 | struct sk_buff *skb, | |
1152 | struct knav_dma_desc *desc) | |
1153 | { | |
1154 | struct netcp_tx_pipe *tx_pipe = NULL; | |
1155 | struct netcp_hook_list *tx_hook; | |
1156 | struct netcp_packet p_info; | |
84640e27 KM |
1157 | unsigned int dma_sz; |
1158 | dma_addr_t dma; | |
e170f409 | 1159 | u32 tmp = 0; |
84640e27 KM |
1160 | int ret = 0; |
1161 | ||
1162 | p_info.netcp = netcp; | |
1163 | p_info.skb = skb; | |
1164 | p_info.tx_pipe = NULL; | |
1165 | p_info.psdata_len = 0; | |
1166 | p_info.ts_context = NULL; | |
1167 | p_info.txtstamp_complete = NULL; | |
1168 | p_info.epib = desc->epib; | |
9dd2d6c5 AB |
1169 | p_info.psdata = (u32 __force *)desc->psdata; |
1170 | memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(__le32)); | |
84640e27 KM |
1171 | |
1172 | /* Find out where to inject the packet for transmission */ | |
1173 | list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) { | |
1174 | ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data, | |
1175 | &p_info); | |
1176 | if (unlikely(ret != 0)) { | |
1177 | dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n", | |
1178 | tx_hook->order, ret); | |
1179 | ret = (ret < 0) ? ret : NETDEV_TX_OK; | |
1180 | goto out; | |
1181 | } | |
1182 | } | |
1183 | ||
1184 | /* Make sure some TX hook claimed the packet */ | |
1185 | tx_pipe = p_info.tx_pipe; | |
1186 | if (!tx_pipe) { | |
1187 | dev_err(netcp->ndev_dev, "No TX hook claimed the packet!\n"); | |
1188 | ret = -ENXIO; | |
1189 | goto out; | |
1190 | } | |
1191 | ||
1192 | /* update descriptor */ | |
1193 | if (p_info.psdata_len) { | |
9dd2d6c5 AB |
1194 | /* psdata points to both native-endian and device-endian data */ |
1195 | __le32 *psdata = (void __force *)p_info.psdata; | |
84640e27 KM |
1196 | |
1197 | memmove(p_info.psdata, p_info.psdata + p_info.psdata_len, | |
1198 | p_info.psdata_len); | |
9dd2d6c5 | 1199 | set_words(p_info.psdata, p_info.psdata_len, psdata); |
e170f409 | 1200 | tmp |= (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) << |
84640e27 KM |
1201 | KNAV_DMA_DESC_PSLEN_SHIFT; |
1202 | } | |
1203 | ||
e170f409 | 1204 | tmp |= KNAV_DMA_DESC_HAS_EPIB | |
84640e27 | 1205 | ((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) << |
e170f409 | 1206 | KNAV_DMA_DESC_RETQ_SHIFT); |
84640e27 | 1207 | |
e170f409 KM |
1208 | if (!(tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO)) { |
1209 | tmp |= ((tx_pipe->switch_to_port & KNAV_DMA_DESC_PSFLAG_MASK) << | |
1210 | KNAV_DMA_DESC_PSFLAG_SHIFT); | |
1211 | } | |
1212 | ||
1213 | set_words(&tmp, 1, &desc->packet_info); | |
06324481 KM |
1214 | /* warning!!!! We are saving the virtual ptr in the sw_data |
1215 | * field as a 32bit value. Will not work on 64bit machines | |
1216 | */ | |
1217 | SET_SW_DATA0((u32)skb, desc); | |
84640e27 | 1218 | |
e170f409 KM |
1219 | if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) { |
1220 | tmp = tx_pipe->switch_to_port; | |
89907779 | 1221 | set_words(&tmp, 1, &desc->tag_info); |
e170f409 KM |
1222 | } |
1223 | ||
84640e27 KM |
1224 | /* submit packet descriptor */ |
1225 | ret = knav_pool_desc_map(netcp->tx_pool, desc, sizeof(*desc), &dma, | |
1226 | &dma_sz); | |
1227 | if (unlikely(ret)) { | |
1228 | dev_err(netcp->ndev_dev, "%s() failed to map desc\n", __func__); | |
1229 | ret = -ENOMEM; | |
1230 | goto out; | |
1231 | } | |
1232 | skb_tx_timestamp(skb); | |
1233 | knav_queue_push(tx_pipe->dma_queue, dma, dma_sz, 0); | |
1234 | ||
1235 | out: | |
1236 | return ret; | |
1237 | } | |
1238 | ||
1239 | /* Submit the packet */ | |
1240 | static int netcp_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1241 | { | |
1242 | struct netcp_intf *netcp = netdev_priv(ndev); | |
1243 | int subqueue = skb_get_queue_mapping(skb); | |
1244 | struct knav_dma_desc *desc; | |
1245 | int desc_count, ret = 0; | |
1246 | ||
1247 | if (unlikely(skb->len <= 0)) { | |
1248 | dev_kfree_skb(skb); | |
1249 | return NETDEV_TX_OK; | |
1250 | } | |
1251 | ||
1252 | if (unlikely(skb->len < NETCP_MIN_PACKET_SIZE)) { | |
1253 | ret = skb_padto(skb, NETCP_MIN_PACKET_SIZE); | |
1254 | if (ret < 0) { | |
1255 | /* If we get here, the skb has already been dropped */ | |
1256 | dev_warn(netcp->ndev_dev, "padding failed (%d), packet dropped\n", | |
1257 | ret); | |
1258 | ndev->stats.tx_dropped++; | |
1259 | return ret; | |
1260 | } | |
1261 | skb->len = NETCP_MIN_PACKET_SIZE; | |
1262 | } | |
1263 | ||
1264 | desc = netcp_tx_map_skb(skb, netcp); | |
1265 | if (unlikely(!desc)) { | |
1266 | netif_stop_subqueue(ndev, subqueue); | |
1267 | ret = -ENOBUFS; | |
1268 | goto drop; | |
1269 | } | |
1270 | ||
1271 | ret = netcp_tx_submit_skb(netcp, skb, desc); | |
1272 | if (ret) | |
1273 | goto drop; | |
1274 | ||
1275 | ndev->trans_start = jiffies; | |
1276 | ||
1277 | /* Check Tx pool count & stop subqueue if needed */ | |
1278 | desc_count = knav_pool_count(netcp->tx_pool); | |
1279 | if (desc_count < netcp->tx_pause_threshold) { | |
1280 | dev_dbg(netcp->ndev_dev, "pausing tx, count(%d)\n", desc_count); | |
1281 | netif_stop_subqueue(ndev, subqueue); | |
1282 | } | |
1283 | return NETDEV_TX_OK; | |
1284 | ||
1285 | drop: | |
1286 | ndev->stats.tx_dropped++; | |
1287 | if (desc) | |
1288 | netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc)); | |
1289 | dev_kfree_skb(skb); | |
1290 | return ret; | |
1291 | } | |
1292 | ||
1293 | int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe) | |
1294 | { | |
1295 | if (tx_pipe->dma_channel) { | |
1296 | knav_dma_close_channel(tx_pipe->dma_channel); | |
1297 | tx_pipe->dma_channel = NULL; | |
1298 | } | |
1299 | return 0; | |
1300 | } | |
58c11b5f | 1301 | EXPORT_SYMBOL_GPL(netcp_txpipe_close); |
84640e27 KM |
1302 | |
1303 | int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe) | |
1304 | { | |
1305 | struct device *dev = tx_pipe->netcp_device->device; | |
1306 | struct knav_dma_cfg config; | |
1307 | int ret = 0; | |
1308 | u8 name[16]; | |
1309 | ||
1310 | memset(&config, 0, sizeof(config)); | |
1311 | config.direction = DMA_MEM_TO_DEV; | |
1312 | config.u.tx.filt_einfo = false; | |
1313 | config.u.tx.filt_pswords = false; | |
1314 | config.u.tx.priority = DMA_PRIO_MED_L; | |
1315 | ||
1316 | tx_pipe->dma_channel = knav_dma_open_channel(dev, | |
1317 | tx_pipe->dma_chan_name, &config); | |
1318 | if (IS_ERR_OR_NULL(tx_pipe->dma_channel)) { | |
1319 | dev_err(dev, "failed opening tx chan(%s)\n", | |
1320 | tx_pipe->dma_chan_name); | |
1321 | goto err; | |
1322 | } | |
1323 | ||
1324 | snprintf(name, sizeof(name), "tx-pipe-%s", dev_name(dev)); | |
1325 | tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id, | |
1326 | KNAV_QUEUE_SHARED); | |
1327 | if (IS_ERR(tx_pipe->dma_queue)) { | |
1328 | dev_err(dev, "Could not open DMA queue for channel \"%s\": %d\n", | |
1329 | name, ret); | |
1330 | ret = PTR_ERR(tx_pipe->dma_queue); | |
1331 | goto err; | |
1332 | } | |
1333 | ||
1334 | dev_dbg(dev, "opened tx pipe %s\n", name); | |
1335 | return 0; | |
1336 | ||
1337 | err: | |
1338 | if (!IS_ERR_OR_NULL(tx_pipe->dma_channel)) | |
1339 | knav_dma_close_channel(tx_pipe->dma_channel); | |
1340 | tx_pipe->dma_channel = NULL; | |
1341 | return ret; | |
1342 | } | |
58c11b5f | 1343 | EXPORT_SYMBOL_GPL(netcp_txpipe_open); |
84640e27 KM |
1344 | |
1345 | int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe, | |
1346 | struct netcp_device *netcp_device, | |
1347 | const char *dma_chan_name, unsigned int dma_queue_id) | |
1348 | { | |
1349 | memset(tx_pipe, 0, sizeof(*tx_pipe)); | |
1350 | tx_pipe->netcp_device = netcp_device; | |
1351 | tx_pipe->dma_chan_name = dma_chan_name; | |
1352 | tx_pipe->dma_queue_id = dma_queue_id; | |
1353 | return 0; | |
1354 | } | |
58c11b5f | 1355 | EXPORT_SYMBOL_GPL(netcp_txpipe_init); |
84640e27 KM |
1356 | |
1357 | static struct netcp_addr *netcp_addr_find(struct netcp_intf *netcp, | |
1358 | const u8 *addr, | |
1359 | enum netcp_addr_type type) | |
1360 | { | |
1361 | struct netcp_addr *naddr; | |
1362 | ||
1363 | list_for_each_entry(naddr, &netcp->addr_list, node) { | |
1364 | if (naddr->type != type) | |
1365 | continue; | |
1366 | if (addr && memcmp(addr, naddr->addr, ETH_ALEN)) | |
1367 | continue; | |
1368 | return naddr; | |
1369 | } | |
1370 | ||
1371 | return NULL; | |
1372 | } | |
1373 | ||
1374 | static struct netcp_addr *netcp_addr_add(struct netcp_intf *netcp, | |
1375 | const u8 *addr, | |
1376 | enum netcp_addr_type type) | |
1377 | { | |
1378 | struct netcp_addr *naddr; | |
1379 | ||
1380 | naddr = devm_kmalloc(netcp->dev, sizeof(*naddr), GFP_ATOMIC); | |
1381 | if (!naddr) | |
1382 | return NULL; | |
1383 | ||
1384 | naddr->type = type; | |
1385 | naddr->flags = 0; | |
1386 | naddr->netcp = netcp; | |
1387 | if (addr) | |
1388 | ether_addr_copy(naddr->addr, addr); | |
1389 | else | |
c7bf7169 | 1390 | eth_zero_addr(naddr->addr); |
84640e27 KM |
1391 | list_add_tail(&naddr->node, &netcp->addr_list); |
1392 | ||
1393 | return naddr; | |
1394 | } | |
1395 | ||
1396 | static void netcp_addr_del(struct netcp_intf *netcp, struct netcp_addr *naddr) | |
1397 | { | |
1398 | list_del(&naddr->node); | |
1399 | devm_kfree(netcp->dev, naddr); | |
1400 | } | |
1401 | ||
1402 | static void netcp_addr_clear_mark(struct netcp_intf *netcp) | |
1403 | { | |
1404 | struct netcp_addr *naddr; | |
1405 | ||
1406 | list_for_each_entry(naddr, &netcp->addr_list, node) | |
1407 | naddr->flags = 0; | |
1408 | } | |
1409 | ||
1410 | static void netcp_addr_add_mark(struct netcp_intf *netcp, const u8 *addr, | |
1411 | enum netcp_addr_type type) | |
1412 | { | |
1413 | struct netcp_addr *naddr; | |
1414 | ||
1415 | naddr = netcp_addr_find(netcp, addr, type); | |
1416 | if (naddr) { | |
1417 | naddr->flags |= ADDR_VALID; | |
1418 | return; | |
1419 | } | |
1420 | ||
1421 | naddr = netcp_addr_add(netcp, addr, type); | |
1422 | if (!WARN_ON(!naddr)) | |
1423 | naddr->flags |= ADDR_NEW; | |
1424 | } | |
1425 | ||
1426 | static void netcp_addr_sweep_del(struct netcp_intf *netcp) | |
1427 | { | |
1428 | struct netcp_addr *naddr, *tmp; | |
1429 | struct netcp_intf_modpriv *priv; | |
1430 | struct netcp_module *module; | |
1431 | int error; | |
1432 | ||
1433 | list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) { | |
1434 | if (naddr->flags & (ADDR_VALID | ADDR_NEW)) | |
1435 | continue; | |
1436 | dev_dbg(netcp->ndev_dev, "deleting address %pM, type %x\n", | |
1437 | naddr->addr, naddr->type); | |
84640e27 KM |
1438 | for_each_module(netcp, priv) { |
1439 | module = priv->netcp_module; | |
1440 | if (!module->del_addr) | |
1441 | continue; | |
1442 | error = module->del_addr(priv->module_priv, | |
1443 | naddr); | |
1444 | WARN_ON(error); | |
1445 | } | |
84640e27 KM |
1446 | netcp_addr_del(netcp, naddr); |
1447 | } | |
1448 | } | |
1449 | ||
1450 | static void netcp_addr_sweep_add(struct netcp_intf *netcp) | |
1451 | { | |
1452 | struct netcp_addr *naddr, *tmp; | |
1453 | struct netcp_intf_modpriv *priv; | |
1454 | struct netcp_module *module; | |
1455 | int error; | |
1456 | ||
1457 | list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) { | |
1458 | if (!(naddr->flags & ADDR_NEW)) | |
1459 | continue; | |
1460 | dev_dbg(netcp->ndev_dev, "adding address %pM, type %x\n", | |
1461 | naddr->addr, naddr->type); | |
8ceaf361 | 1462 | |
84640e27 KM |
1463 | for_each_module(netcp, priv) { |
1464 | module = priv->netcp_module; | |
1465 | if (!module->add_addr) | |
1466 | continue; | |
1467 | error = module->add_addr(priv->module_priv, naddr); | |
1468 | WARN_ON(error); | |
1469 | } | |
84640e27 KM |
1470 | } |
1471 | } | |
1472 | ||
1473 | static void netcp_set_rx_mode(struct net_device *ndev) | |
1474 | { | |
1475 | struct netcp_intf *netcp = netdev_priv(ndev); | |
1476 | struct netdev_hw_addr *ndev_addr; | |
1477 | bool promisc; | |
1478 | ||
1479 | promisc = (ndev->flags & IFF_PROMISC || | |
1480 | ndev->flags & IFF_ALLMULTI || | |
1481 | netdev_mc_count(ndev) > NETCP_MAX_MCAST_ADDR); | |
1482 | ||
8ceaf361 | 1483 | spin_lock(&netcp->lock); |
84640e27 KM |
1484 | /* first clear all marks */ |
1485 | netcp_addr_clear_mark(netcp); | |
1486 | ||
1487 | /* next add new entries, mark existing ones */ | |
1488 | netcp_addr_add_mark(netcp, ndev->broadcast, ADDR_BCAST); | |
1489 | for_each_dev_addr(ndev, ndev_addr) | |
1490 | netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_DEV); | |
1491 | netdev_for_each_uc_addr(ndev_addr, ndev) | |
1492 | netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_UCAST); | |
1493 | netdev_for_each_mc_addr(ndev_addr, ndev) | |
1494 | netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_MCAST); | |
1495 | ||
1496 | if (promisc) | |
1497 | netcp_addr_add_mark(netcp, NULL, ADDR_ANY); | |
1498 | ||
1499 | /* finally sweep and callout into modules */ | |
1500 | netcp_addr_sweep_del(netcp); | |
1501 | netcp_addr_sweep_add(netcp); | |
8ceaf361 | 1502 | spin_unlock(&netcp->lock); |
84640e27 KM |
1503 | } |
1504 | ||
1505 | static void netcp_free_navigator_resources(struct netcp_intf *netcp) | |
1506 | { | |
1507 | int i; | |
1508 | ||
1509 | if (netcp->rx_channel) { | |
1510 | knav_dma_close_channel(netcp->rx_channel); | |
1511 | netcp->rx_channel = NULL; | |
1512 | } | |
1513 | ||
1514 | if (!IS_ERR_OR_NULL(netcp->rx_pool)) | |
1515 | netcp_rxpool_free(netcp); | |
1516 | ||
1517 | if (!IS_ERR_OR_NULL(netcp->rx_queue)) { | |
1518 | knav_queue_close(netcp->rx_queue); | |
1519 | netcp->rx_queue = NULL; | |
1520 | } | |
1521 | ||
1522 | for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && | |
1523 | !IS_ERR_OR_NULL(netcp->rx_fdq[i]) ; ++i) { | |
1524 | knav_queue_close(netcp->rx_fdq[i]); | |
1525 | netcp->rx_fdq[i] = NULL; | |
1526 | } | |
1527 | ||
1528 | if (!IS_ERR_OR_NULL(netcp->tx_compl_q)) { | |
1529 | knav_queue_close(netcp->tx_compl_q); | |
1530 | netcp->tx_compl_q = NULL; | |
1531 | } | |
1532 | ||
1533 | if (!IS_ERR_OR_NULL(netcp->tx_pool)) { | |
1534 | knav_pool_destroy(netcp->tx_pool); | |
1535 | netcp->tx_pool = NULL; | |
1536 | } | |
1537 | } | |
1538 | ||
1539 | static int netcp_setup_navigator_resources(struct net_device *ndev) | |
1540 | { | |
1541 | struct netcp_intf *netcp = netdev_priv(ndev); | |
1542 | struct knav_queue_notify_config notify_cfg; | |
1543 | struct knav_dma_cfg config; | |
1544 | u32 last_fdq = 0; | |
1545 | u8 name[16]; | |
1546 | int ret; | |
1547 | int i; | |
1548 | ||
1549 | /* Create Rx/Tx descriptor pools */ | |
1550 | snprintf(name, sizeof(name), "rx-pool-%s", ndev->name); | |
1551 | netcp->rx_pool = knav_pool_create(name, netcp->rx_pool_size, | |
1552 | netcp->rx_pool_region_id); | |
1553 | if (IS_ERR_OR_NULL(netcp->rx_pool)) { | |
1554 | dev_err(netcp->ndev_dev, "Couldn't create rx pool\n"); | |
1555 | ret = PTR_ERR(netcp->rx_pool); | |
1556 | goto fail; | |
1557 | } | |
1558 | ||
1559 | snprintf(name, sizeof(name), "tx-pool-%s", ndev->name); | |
1560 | netcp->tx_pool = knav_pool_create(name, netcp->tx_pool_size, | |
1561 | netcp->tx_pool_region_id); | |
1562 | if (IS_ERR_OR_NULL(netcp->tx_pool)) { | |
1563 | dev_err(netcp->ndev_dev, "Couldn't create tx pool\n"); | |
1564 | ret = PTR_ERR(netcp->tx_pool); | |
1565 | goto fail; | |
1566 | } | |
1567 | ||
1568 | /* open Tx completion queue */ | |
1569 | snprintf(name, sizeof(name), "tx-compl-%s", ndev->name); | |
1570 | netcp->tx_compl_q = knav_queue_open(name, netcp->tx_compl_qid, 0); | |
1571 | if (IS_ERR_OR_NULL(netcp->tx_compl_q)) { | |
1572 | ret = PTR_ERR(netcp->tx_compl_q); | |
1573 | goto fail; | |
1574 | } | |
1575 | netcp->tx_compl_qid = knav_queue_get_id(netcp->tx_compl_q); | |
1576 | ||
1577 | /* Set notification for Tx completion */ | |
1578 | notify_cfg.fn = netcp_tx_notify; | |
1579 | notify_cfg.fn_arg = netcp; | |
1580 | ret = knav_queue_device_control(netcp->tx_compl_q, | |
1581 | KNAV_QUEUE_SET_NOTIFIER, | |
1582 | (unsigned long)¬ify_cfg); | |
1583 | if (ret) | |
1584 | goto fail; | |
1585 | ||
1586 | knav_queue_disable_notify(netcp->tx_compl_q); | |
1587 | ||
1588 | /* open Rx completion queue */ | |
1589 | snprintf(name, sizeof(name), "rx-compl-%s", ndev->name); | |
1590 | netcp->rx_queue = knav_queue_open(name, netcp->rx_queue_id, 0); | |
1591 | if (IS_ERR_OR_NULL(netcp->rx_queue)) { | |
1592 | ret = PTR_ERR(netcp->rx_queue); | |
1593 | goto fail; | |
1594 | } | |
1595 | netcp->rx_queue_id = knav_queue_get_id(netcp->rx_queue); | |
1596 | ||
1597 | /* Set notification for Rx completion */ | |
1598 | notify_cfg.fn = netcp_rx_notify; | |
1599 | notify_cfg.fn_arg = netcp; | |
1600 | ret = knav_queue_device_control(netcp->rx_queue, | |
1601 | KNAV_QUEUE_SET_NOTIFIER, | |
1602 | (unsigned long)¬ify_cfg); | |
1603 | if (ret) | |
1604 | goto fail; | |
1605 | ||
1606 | knav_queue_disable_notify(netcp->rx_queue); | |
1607 | ||
1608 | /* open Rx FDQs */ | |
866b8b18 WK |
1609 | for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_queue_depths[i]; |
1610 | ++i) { | |
84640e27 KM |
1611 | snprintf(name, sizeof(name), "rx-fdq-%s-%d", ndev->name, i); |
1612 | netcp->rx_fdq[i] = knav_queue_open(name, KNAV_QUEUE_GP, 0); | |
1613 | if (IS_ERR_OR_NULL(netcp->rx_fdq[i])) { | |
1614 | ret = PTR_ERR(netcp->rx_fdq[i]); | |
1615 | goto fail; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | memset(&config, 0, sizeof(config)); | |
1620 | config.direction = DMA_DEV_TO_MEM; | |
1621 | config.u.rx.einfo_present = true; | |
1622 | config.u.rx.psinfo_present = true; | |
1623 | config.u.rx.err_mode = DMA_DROP; | |
1624 | config.u.rx.desc_type = DMA_DESC_HOST; | |
1625 | config.u.rx.psinfo_at_sop = false; | |
1626 | config.u.rx.sop_offset = NETCP_SOP_OFFSET; | |
1627 | config.u.rx.dst_q = netcp->rx_queue_id; | |
1628 | config.u.rx.thresh = DMA_THRESH_NONE; | |
1629 | ||
1630 | for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN; ++i) { | |
1631 | if (netcp->rx_fdq[i]) | |
1632 | last_fdq = knav_queue_get_id(netcp->rx_fdq[i]); | |
1633 | config.u.rx.fdq[i] = last_fdq; | |
1634 | } | |
1635 | ||
1636 | netcp->rx_channel = knav_dma_open_channel(netcp->netcp_device->device, | |
1637 | netcp->dma_chan_name, &config); | |
1638 | if (IS_ERR_OR_NULL(netcp->rx_channel)) { | |
1639 | dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n", | |
1640 | netcp->dma_chan_name); | |
1641 | goto fail; | |
1642 | } | |
1643 | ||
1644 | dev_dbg(netcp->ndev_dev, "opened RX channel: %p\n", netcp->rx_channel); | |
1645 | return 0; | |
1646 | ||
1647 | fail: | |
1648 | netcp_free_navigator_resources(netcp); | |
1649 | return ret; | |
1650 | } | |
1651 | ||
1652 | /* Open the device */ | |
1653 | static int netcp_ndo_open(struct net_device *ndev) | |
1654 | { | |
1655 | struct netcp_intf *netcp = netdev_priv(ndev); | |
1656 | struct netcp_intf_modpriv *intf_modpriv; | |
1657 | struct netcp_module *module; | |
1658 | int ret; | |
1659 | ||
1660 | netif_carrier_off(ndev); | |
1661 | ret = netcp_setup_navigator_resources(ndev); | |
1662 | if (ret) { | |
1663 | dev_err(netcp->ndev_dev, "Failed to setup navigator resources\n"); | |
1664 | goto fail; | |
1665 | } | |
1666 | ||
84640e27 KM |
1667 | for_each_module(netcp, intf_modpriv) { |
1668 | module = intf_modpriv->netcp_module; | |
1669 | if (module->open) { | |
1670 | ret = module->open(intf_modpriv->module_priv, ndev); | |
1671 | if (ret != 0) { | |
1672 | dev_err(netcp->ndev_dev, "module open failed\n"); | |
1673 | goto fail_open; | |
1674 | } | |
1675 | } | |
1676 | } | |
84640e27 | 1677 | |
84640e27 KM |
1678 | napi_enable(&netcp->rx_napi); |
1679 | napi_enable(&netcp->tx_napi); | |
1680 | knav_queue_enable_notify(netcp->tx_compl_q); | |
1681 | knav_queue_enable_notify(netcp->rx_queue); | |
194ac06e | 1682 | netcp_rxpool_refill(netcp); |
84640e27 KM |
1683 | netif_tx_wake_all_queues(ndev); |
1684 | dev_dbg(netcp->ndev_dev, "netcp device %s opened\n", ndev->name); | |
1685 | return 0; | |
1686 | ||
1687 | fail_open: | |
1688 | for_each_module(netcp, intf_modpriv) { | |
1689 | module = intf_modpriv->netcp_module; | |
1690 | if (module->close) | |
1691 | module->close(intf_modpriv->module_priv, ndev); | |
1692 | } | |
84640e27 KM |
1693 | |
1694 | fail: | |
1695 | netcp_free_navigator_resources(netcp); | |
1696 | return ret; | |
1697 | } | |
1698 | ||
1699 | /* Close the device */ | |
1700 | static int netcp_ndo_stop(struct net_device *ndev) | |
1701 | { | |
1702 | struct netcp_intf *netcp = netdev_priv(ndev); | |
1703 | struct netcp_intf_modpriv *intf_modpriv; | |
1704 | struct netcp_module *module; | |
1705 | int err = 0; | |
1706 | ||
1707 | netif_tx_stop_all_queues(ndev); | |
1708 | netif_carrier_off(ndev); | |
1709 | netcp_addr_clear_mark(netcp); | |
1710 | netcp_addr_sweep_del(netcp); | |
1711 | knav_queue_disable_notify(netcp->rx_queue); | |
1712 | knav_queue_disable_notify(netcp->tx_compl_q); | |
1713 | napi_disable(&netcp->rx_napi); | |
1714 | napi_disable(&netcp->tx_napi); | |
1715 | ||
84640e27 KM |
1716 | for_each_module(netcp, intf_modpriv) { |
1717 | module = intf_modpriv->netcp_module; | |
1718 | if (module->close) { | |
1719 | err = module->close(intf_modpriv->module_priv, ndev); | |
1720 | if (err != 0) | |
1721 | dev_err(netcp->ndev_dev, "Close failed\n"); | |
1722 | } | |
1723 | } | |
84640e27 KM |
1724 | |
1725 | /* Recycle Rx descriptors from completion queue */ | |
1726 | netcp_empty_rx_queue(netcp); | |
1727 | ||
1728 | /* Recycle Tx descriptors from completion queue */ | |
1729 | netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size); | |
1730 | ||
1731 | if (knav_pool_count(netcp->tx_pool) != netcp->tx_pool_size) | |
1732 | dev_err(netcp->ndev_dev, "Lost (%d) Tx descs\n", | |
1733 | netcp->tx_pool_size - knav_pool_count(netcp->tx_pool)); | |
1734 | ||
1735 | netcp_free_navigator_resources(netcp); | |
1736 | dev_dbg(netcp->ndev_dev, "netcp device %s stopped\n", ndev->name); | |
1737 | return 0; | |
1738 | } | |
1739 | ||
1740 | static int netcp_ndo_ioctl(struct net_device *ndev, | |
1741 | struct ifreq *req, int cmd) | |
1742 | { | |
1743 | struct netcp_intf *netcp = netdev_priv(ndev); | |
1744 | struct netcp_intf_modpriv *intf_modpriv; | |
1745 | struct netcp_module *module; | |
1746 | int ret = -1, err = -EOPNOTSUPP; | |
1747 | ||
1748 | if (!netif_running(ndev)) | |
1749 | return -EINVAL; | |
1750 | ||
84640e27 KM |
1751 | for_each_module(netcp, intf_modpriv) { |
1752 | module = intf_modpriv->netcp_module; | |
1753 | if (!module->ioctl) | |
1754 | continue; | |
1755 | ||
1756 | err = module->ioctl(intf_modpriv->module_priv, req, cmd); | |
1757 | if ((err < 0) && (err != -EOPNOTSUPP)) { | |
1758 | ret = err; | |
1759 | goto out; | |
1760 | } | |
1761 | if (err == 0) | |
1762 | ret = err; | |
1763 | } | |
1764 | ||
1765 | out: | |
84640e27 KM |
1766 | return (ret == 0) ? 0 : err; |
1767 | } | |
1768 | ||
1769 | static int netcp_ndo_change_mtu(struct net_device *ndev, int new_mtu) | |
1770 | { | |
1771 | struct netcp_intf *netcp = netdev_priv(ndev); | |
1772 | ||
1773 | /* MTU < 68 is an error for IPv4 traffic */ | |
1774 | if ((new_mtu < 68) || | |
1775 | (new_mtu > (NETCP_MAX_FRAME_SIZE - ETH_HLEN - ETH_FCS_LEN))) { | |
1776 | dev_err(netcp->ndev_dev, "Invalid mtu size = %d\n", new_mtu); | |
1777 | return -EINVAL; | |
1778 | } | |
1779 | ||
1780 | ndev->mtu = new_mtu; | |
1781 | return 0; | |
1782 | } | |
1783 | ||
1784 | static void netcp_ndo_tx_timeout(struct net_device *ndev) | |
1785 | { | |
1786 | struct netcp_intf *netcp = netdev_priv(ndev); | |
1787 | unsigned int descs = knav_pool_count(netcp->tx_pool); | |
1788 | ||
1789 | dev_err(netcp->ndev_dev, "transmit timed out tx descs(%d)\n", descs); | |
1790 | netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size); | |
1791 | ndev->trans_start = jiffies; | |
1792 | netif_tx_wake_all_queues(ndev); | |
1793 | } | |
1794 | ||
1795 | static int netcp_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid) | |
1796 | { | |
1797 | struct netcp_intf *netcp = netdev_priv(ndev); | |
1798 | struct netcp_intf_modpriv *intf_modpriv; | |
1799 | struct netcp_module *module; | |
8ceaf361 | 1800 | unsigned long flags; |
84640e27 KM |
1801 | int err = 0; |
1802 | ||
1803 | dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid); | |
1804 | ||
8ceaf361 | 1805 | spin_lock_irqsave(&netcp->lock, flags); |
84640e27 KM |
1806 | for_each_module(netcp, intf_modpriv) { |
1807 | module = intf_modpriv->netcp_module; | |
1808 | if ((module->add_vid) && (vid != 0)) { | |
1809 | err = module->add_vid(intf_modpriv->module_priv, vid); | |
1810 | if (err != 0) { | |
1811 | dev_err(netcp->ndev_dev, "Could not add vlan id = %d\n", | |
1812 | vid); | |
1813 | break; | |
1814 | } | |
1815 | } | |
1816 | } | |
8ceaf361 KM |
1817 | spin_unlock_irqrestore(&netcp->lock, flags); |
1818 | ||
84640e27 KM |
1819 | return err; |
1820 | } | |
1821 | ||
1822 | static int netcp_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid) | |
1823 | { | |
1824 | struct netcp_intf *netcp = netdev_priv(ndev); | |
1825 | struct netcp_intf_modpriv *intf_modpriv; | |
1826 | struct netcp_module *module; | |
8ceaf361 | 1827 | unsigned long flags; |
84640e27 KM |
1828 | int err = 0; |
1829 | ||
1830 | dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid); | |
1831 | ||
8ceaf361 | 1832 | spin_lock_irqsave(&netcp->lock, flags); |
84640e27 KM |
1833 | for_each_module(netcp, intf_modpriv) { |
1834 | module = intf_modpriv->netcp_module; | |
1835 | if (module->del_vid) { | |
1836 | err = module->del_vid(intf_modpriv->module_priv, vid); | |
1837 | if (err != 0) { | |
1838 | dev_err(netcp->ndev_dev, "Could not delete vlan id = %d\n", | |
1839 | vid); | |
1840 | break; | |
1841 | } | |
1842 | } | |
1843 | } | |
8ceaf361 | 1844 | spin_unlock_irqrestore(&netcp->lock, flags); |
84640e27 KM |
1845 | return err; |
1846 | } | |
1847 | ||
1848 | static u16 netcp_select_queue(struct net_device *dev, struct sk_buff *skb, | |
1849 | void *accel_priv, | |
1850 | select_queue_fallback_t fallback) | |
1851 | { | |
1852 | return 0; | |
1853 | } | |
1854 | ||
16e5cc64 | 1855 | static int netcp_setup_tc(struct net_device *dev, u32 handle, __be16 proto, |
0c71de66 | 1856 | struct tc_to_netdev *tc) |
84640e27 KM |
1857 | { |
1858 | int i; | |
1859 | ||
1860 | /* setup tc must be called under rtnl lock */ | |
1861 | ASSERT_RTNL(); | |
1862 | ||
5eb4dce3 | 1863 | if (tc->type != TC_SETUP_MQPRIO) |
e4c6734e JF |
1864 | return -EINVAL; |
1865 | ||
84640e27 KM |
1866 | /* Sanity-check the number of traffic classes requested */ |
1867 | if ((dev->real_num_tx_queues <= 1) || | |
16e5cc64 | 1868 | (dev->real_num_tx_queues < tc->tc)) |
84640e27 KM |
1869 | return -EINVAL; |
1870 | ||
1871 | /* Configure traffic class to queue mappings */ | |
16e5cc64 JF |
1872 | if (tc->tc) { |
1873 | netdev_set_num_tc(dev, tc->tc); | |
1874 | for (i = 0; i < tc->tc; i++) | |
84640e27 KM |
1875 | netdev_set_tc_queue(dev, i, 1, i); |
1876 | } else { | |
1877 | netdev_reset_tc(dev); | |
1878 | } | |
1879 | ||
1880 | return 0; | |
1881 | } | |
1882 | ||
1883 | static const struct net_device_ops netcp_netdev_ops = { | |
1884 | .ndo_open = netcp_ndo_open, | |
1885 | .ndo_stop = netcp_ndo_stop, | |
1886 | .ndo_start_xmit = netcp_ndo_start_xmit, | |
1887 | .ndo_set_rx_mode = netcp_set_rx_mode, | |
1888 | .ndo_do_ioctl = netcp_ndo_ioctl, | |
1889 | .ndo_change_mtu = netcp_ndo_change_mtu, | |
1890 | .ndo_set_mac_address = eth_mac_addr, | |
1891 | .ndo_validate_addr = eth_validate_addr, | |
1892 | .ndo_vlan_rx_add_vid = netcp_rx_add_vid, | |
1893 | .ndo_vlan_rx_kill_vid = netcp_rx_kill_vid, | |
1894 | .ndo_tx_timeout = netcp_ndo_tx_timeout, | |
1895 | .ndo_select_queue = netcp_select_queue, | |
1896 | .ndo_setup_tc = netcp_setup_tc, | |
1897 | }; | |
1898 | ||
1899 | static int netcp_create_interface(struct netcp_device *netcp_device, | |
1900 | struct device_node *node_interface) | |
1901 | { | |
1902 | struct device *dev = netcp_device->device; | |
1903 | struct device_node *node = dev->of_node; | |
1904 | struct netcp_intf *netcp; | |
1905 | struct net_device *ndev; | |
1906 | resource_size_t size; | |
1907 | struct resource res; | |
1908 | void __iomem *efuse = NULL; | |
1909 | u32 efuse_mac = 0; | |
1910 | const void *mac_addr; | |
1911 | u8 efuse_mac_addr[6]; | |
1912 | u32 temp[2]; | |
1913 | int ret = 0; | |
1914 | ||
1915 | ndev = alloc_etherdev_mqs(sizeof(*netcp), 1, 1); | |
1916 | if (!ndev) { | |
1917 | dev_err(dev, "Error allocating netdev\n"); | |
1918 | return -ENOMEM; | |
1919 | } | |
1920 | ||
1921 | ndev->features |= NETIF_F_SG; | |
1922 | ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; | |
1923 | ndev->hw_features = ndev->features; | |
1924 | ndev->vlan_features |= NETIF_F_SG; | |
1925 | ||
1926 | netcp = netdev_priv(ndev); | |
1927 | spin_lock_init(&netcp->lock); | |
1928 | INIT_LIST_HEAD(&netcp->module_head); | |
1929 | INIT_LIST_HEAD(&netcp->txhook_list_head); | |
1930 | INIT_LIST_HEAD(&netcp->rxhook_list_head); | |
1931 | INIT_LIST_HEAD(&netcp->addr_list); | |
1932 | netcp->netcp_device = netcp_device; | |
1933 | netcp->dev = netcp_device->device; | |
1934 | netcp->ndev = ndev; | |
1935 | netcp->ndev_dev = &ndev->dev; | |
1936 | netcp->msg_enable = netif_msg_init(netcp_debug_level, NETCP_DEBUG); | |
1937 | netcp->tx_pause_threshold = MAX_SKB_FRAGS; | |
1938 | netcp->tx_resume_threshold = netcp->tx_pause_threshold; | |
1939 | netcp->node_interface = node_interface; | |
1940 | ||
1941 | ret = of_property_read_u32(node_interface, "efuse-mac", &efuse_mac); | |
1942 | if (efuse_mac) { | |
1943 | if (of_address_to_resource(node, NETCP_EFUSE_REG_INDEX, &res)) { | |
1944 | dev_err(dev, "could not find efuse-mac reg resource\n"); | |
1945 | ret = -ENODEV; | |
1946 | goto quit; | |
1947 | } | |
1948 | size = resource_size(&res); | |
1949 | ||
1950 | if (!devm_request_mem_region(dev, res.start, size, | |
1951 | dev_name(dev))) { | |
1952 | dev_err(dev, "could not reserve resource\n"); | |
1953 | ret = -ENOMEM; | |
1954 | goto quit; | |
1955 | } | |
1956 | ||
1957 | efuse = devm_ioremap_nocache(dev, res.start, size); | |
1958 | if (!efuse) { | |
1959 | dev_err(dev, "could not map resource\n"); | |
1960 | devm_release_mem_region(dev, res.start, size); | |
1961 | ret = -ENOMEM; | |
1962 | goto quit; | |
1963 | } | |
1964 | ||
71382bc0 | 1965 | emac_arch_get_mac_addr(efuse_mac_addr, efuse, efuse_mac); |
84640e27 KM |
1966 | if (is_valid_ether_addr(efuse_mac_addr)) |
1967 | ether_addr_copy(ndev->dev_addr, efuse_mac_addr); | |
1968 | else | |
1969 | random_ether_addr(ndev->dev_addr); | |
1970 | ||
1971 | devm_iounmap(dev, efuse); | |
1972 | devm_release_mem_region(dev, res.start, size); | |
1973 | } else { | |
1974 | mac_addr = of_get_mac_address(node_interface); | |
1975 | if (mac_addr) | |
1976 | ether_addr_copy(ndev->dev_addr, mac_addr); | |
1977 | else | |
1978 | random_ether_addr(ndev->dev_addr); | |
1979 | } | |
1980 | ||
1981 | ret = of_property_read_string(node_interface, "rx-channel", | |
1982 | &netcp->dma_chan_name); | |
1983 | if (ret < 0) { | |
1984 | dev_err(dev, "missing \"rx-channel\" parameter\n"); | |
1985 | ret = -ENODEV; | |
1986 | goto quit; | |
1987 | } | |
1988 | ||
1989 | ret = of_property_read_u32(node_interface, "rx-queue", | |
1990 | &netcp->rx_queue_id); | |
1991 | if (ret < 0) { | |
1992 | dev_warn(dev, "missing \"rx-queue\" parameter\n"); | |
1993 | netcp->rx_queue_id = KNAV_QUEUE_QPEND; | |
1994 | } | |
1995 | ||
1996 | ret = of_property_read_u32_array(node_interface, "rx-queue-depth", | |
1997 | netcp->rx_queue_depths, | |
1998 | KNAV_DMA_FDQ_PER_CHAN); | |
1999 | if (ret < 0) { | |
2000 | dev_err(dev, "missing \"rx-queue-depth\" parameter\n"); | |
2001 | netcp->rx_queue_depths[0] = 128; | |
2002 | } | |
2003 | ||
84640e27 KM |
2004 | ret = of_property_read_u32_array(node_interface, "rx-pool", temp, 2); |
2005 | if (ret < 0) { | |
2006 | dev_err(dev, "missing \"rx-pool\" parameter\n"); | |
2007 | ret = -ENODEV; | |
2008 | goto quit; | |
2009 | } | |
2010 | netcp->rx_pool_size = temp[0]; | |
2011 | netcp->rx_pool_region_id = temp[1]; | |
2012 | ||
2013 | ret = of_property_read_u32_array(node_interface, "tx-pool", temp, 2); | |
2014 | if (ret < 0) { | |
2015 | dev_err(dev, "missing \"tx-pool\" parameter\n"); | |
2016 | ret = -ENODEV; | |
2017 | goto quit; | |
2018 | } | |
2019 | netcp->tx_pool_size = temp[0]; | |
2020 | netcp->tx_pool_region_id = temp[1]; | |
2021 | ||
2022 | if (netcp->tx_pool_size < MAX_SKB_FRAGS) { | |
2023 | dev_err(dev, "tx-pool size too small, must be atleast(%ld)\n", | |
2024 | MAX_SKB_FRAGS); | |
2025 | ret = -ENODEV; | |
2026 | goto quit; | |
2027 | } | |
2028 | ||
2029 | ret = of_property_read_u32(node_interface, "tx-completion-queue", | |
2030 | &netcp->tx_compl_qid); | |
2031 | if (ret < 0) { | |
2032 | dev_warn(dev, "missing \"tx-completion-queue\" parameter\n"); | |
2033 | netcp->tx_compl_qid = KNAV_QUEUE_QPEND; | |
2034 | } | |
2035 | ||
2036 | /* NAPI register */ | |
2037 | netif_napi_add(ndev, &netcp->rx_napi, netcp_rx_poll, NETCP_NAPI_WEIGHT); | |
d64b5e85 | 2038 | netif_tx_napi_add(ndev, &netcp->tx_napi, netcp_tx_poll, NETCP_NAPI_WEIGHT); |
84640e27 KM |
2039 | |
2040 | /* Register the network device */ | |
2041 | ndev->dev_id = 0; | |
2042 | ndev->watchdog_timeo = NETCP_TX_TIMEOUT; | |
2043 | ndev->netdev_ops = &netcp_netdev_ops; | |
2044 | SET_NETDEV_DEV(ndev, dev); | |
2045 | ||
2046 | list_add_tail(&netcp->interface_list, &netcp_device->interface_head); | |
2047 | return 0; | |
2048 | ||
2049 | quit: | |
2050 | free_netdev(ndev); | |
2051 | return ret; | |
2052 | } | |
2053 | ||
2054 | static void netcp_delete_interface(struct netcp_device *netcp_device, | |
2055 | struct net_device *ndev) | |
2056 | { | |
2057 | struct netcp_intf_modpriv *intf_modpriv, *tmp; | |
2058 | struct netcp_intf *netcp = netdev_priv(ndev); | |
2059 | struct netcp_module *module; | |
2060 | ||
2061 | dev_dbg(netcp_device->device, "Removing interface \"%s\"\n", | |
2062 | ndev->name); | |
2063 | ||
2064 | /* Notify each of the modules that the interface is going away */ | |
2065 | list_for_each_entry_safe(intf_modpriv, tmp, &netcp->module_head, | |
2066 | intf_list) { | |
2067 | module = intf_modpriv->netcp_module; | |
2068 | dev_dbg(netcp_device->device, "Releasing module \"%s\"\n", | |
2069 | module->name); | |
2070 | if (module->release) | |
2071 | module->release(intf_modpriv->module_priv); | |
2072 | list_del(&intf_modpriv->intf_list); | |
2073 | kfree(intf_modpriv); | |
2074 | } | |
2075 | WARN(!list_empty(&netcp->module_head), "%s interface module list is not empty!\n", | |
2076 | ndev->name); | |
2077 | ||
2078 | list_del(&netcp->interface_list); | |
2079 | ||
2080 | of_node_put(netcp->node_interface); | |
2081 | unregister_netdev(ndev); | |
2082 | netif_napi_del(&netcp->rx_napi); | |
2083 | free_netdev(ndev); | |
2084 | } | |
2085 | ||
2086 | static int netcp_probe(struct platform_device *pdev) | |
2087 | { | |
2088 | struct device_node *node = pdev->dev.of_node; | |
2089 | struct netcp_intf *netcp_intf, *netcp_tmp; | |
2090 | struct device_node *child, *interfaces; | |
2091 | struct netcp_device *netcp_device; | |
2092 | struct device *dev = &pdev->dev; | |
84640e27 KM |
2093 | int ret; |
2094 | ||
2095 | if (!node) { | |
2096 | dev_err(dev, "could not find device info\n"); | |
2097 | return -ENODEV; | |
2098 | } | |
2099 | ||
2100 | /* Allocate a new NETCP device instance */ | |
2101 | netcp_device = devm_kzalloc(dev, sizeof(*netcp_device), GFP_KERNEL); | |
2102 | if (!netcp_device) | |
2103 | return -ENOMEM; | |
2104 | ||
2105 | pm_runtime_enable(&pdev->dev); | |
2106 | ret = pm_runtime_get_sync(&pdev->dev); | |
2107 | if (ret < 0) { | |
2108 | dev_err(dev, "Failed to enable NETCP power-domain\n"); | |
2109 | pm_runtime_disable(&pdev->dev); | |
2110 | return ret; | |
2111 | } | |
2112 | ||
2113 | /* Initialize the NETCP device instance */ | |
2114 | INIT_LIST_HEAD(&netcp_device->interface_head); | |
2115 | INIT_LIST_HEAD(&netcp_device->modpriv_head); | |
2116 | netcp_device->device = dev; | |
2117 | platform_set_drvdata(pdev, netcp_device); | |
2118 | ||
2119 | /* create interfaces */ | |
2120 | interfaces = of_get_child_by_name(node, "netcp-interfaces"); | |
2121 | if (!interfaces) { | |
2122 | dev_err(dev, "could not find netcp-interfaces node\n"); | |
2123 | ret = -ENODEV; | |
2124 | goto probe_quit; | |
2125 | } | |
2126 | ||
2127 | for_each_available_child_of_node(interfaces, child) { | |
2128 | ret = netcp_create_interface(netcp_device, child); | |
2129 | if (ret) { | |
2130 | dev_err(dev, "could not create interface(%s)\n", | |
2131 | child->name); | |
2132 | goto probe_quit_interface; | |
2133 | } | |
2134 | } | |
2135 | ||
2136 | /* Add the device instance to the list */ | |
2137 | list_add_tail(&netcp_device->device_list, &netcp_devices); | |
2138 | ||
84640e27 KM |
2139 | return 0; |
2140 | ||
2141 | probe_quit_interface: | |
2142 | list_for_each_entry_safe(netcp_intf, netcp_tmp, | |
2143 | &netcp_device->interface_head, | |
2144 | interface_list) { | |
2145 | netcp_delete_interface(netcp_device, netcp_intf->ndev); | |
2146 | } | |
2147 | ||
2148 | probe_quit: | |
2149 | pm_runtime_put_sync(&pdev->dev); | |
2150 | pm_runtime_disable(&pdev->dev); | |
2151 | platform_set_drvdata(pdev, NULL); | |
2152 | return ret; | |
2153 | } | |
2154 | ||
2155 | static int netcp_remove(struct platform_device *pdev) | |
2156 | { | |
2157 | struct netcp_device *netcp_device = platform_get_drvdata(pdev); | |
01a03099 | 2158 | struct netcp_intf *netcp_intf, *netcp_tmp; |
84640e27 KM |
2159 | struct netcp_inst_modpriv *inst_modpriv, *tmp; |
2160 | struct netcp_module *module; | |
2161 | ||
2162 | list_for_each_entry_safe(inst_modpriv, tmp, &netcp_device->modpriv_head, | |
2163 | inst_list) { | |
2164 | module = inst_modpriv->netcp_module; | |
2165 | dev_dbg(&pdev->dev, "Removing module \"%s\"\n", module->name); | |
2166 | module->remove(netcp_device, inst_modpriv->module_priv); | |
2167 | list_del(&inst_modpriv->inst_list); | |
2168 | kfree(inst_modpriv); | |
2169 | } | |
84640e27 | 2170 | |
01a03099 KM |
2171 | /* now that all modules are removed, clean up the interfaces */ |
2172 | list_for_each_entry_safe(netcp_intf, netcp_tmp, | |
2173 | &netcp_device->interface_head, | |
2174 | interface_list) { | |
2175 | netcp_delete_interface(netcp_device, netcp_intf->ndev); | |
2176 | } | |
2177 | ||
2178 | WARN(!list_empty(&netcp_device->interface_head), | |
2179 | "%s interface list not empty!\n", pdev->name); | |
84640e27 | 2180 | |
84640e27 KM |
2181 | pm_runtime_put_sync(&pdev->dev); |
2182 | pm_runtime_disable(&pdev->dev); | |
2183 | platform_set_drvdata(pdev, NULL); | |
2184 | return 0; | |
2185 | } | |
2186 | ||
1156c965 | 2187 | static const struct of_device_id of_match[] = { |
84640e27 KM |
2188 | { .compatible = "ti,netcp-1.0", }, |
2189 | {}, | |
2190 | }; | |
2191 | MODULE_DEVICE_TABLE(of, of_match); | |
2192 | ||
2193 | static struct platform_driver netcp_driver = { | |
2194 | .driver = { | |
2195 | .name = "netcp-1.0", | |
84640e27 KM |
2196 | .of_match_table = of_match, |
2197 | }, | |
2198 | .probe = netcp_probe, | |
2199 | .remove = netcp_remove, | |
2200 | }; | |
2201 | module_platform_driver(netcp_driver); | |
2202 | ||
2203 | MODULE_LICENSE("GPL v2"); | |
2204 | MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs"); | |
2205 | MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com"); |