2 * Keystone NetCP Core driver
4 * Copyright (C) 2014 Texas Instruments Incorporated
5 * Authors: Sandeep Nair <sandeep_n@ti.com>
6 * Sandeep Paulraj <s-paulraj@ti.com>
7 * Cyril Chemparathy <cyril@ti.com>
8 * Santosh Shilimkar <santosh.shilimkar@ti.com>
9 * Murali Karicheri <m-karicheri2@ti.com>
10 * Wingman Kwok <w-kwok2@ti.com>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation version 2.
16 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
17 * kind, whether express or implied; without even the implied warranty
18 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
23 #include <linux/module.h>
24 #include <linux/of_net.h>
25 #include <linux/of_address.h>
26 #include <linux/if_vlan.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/platform_device.h>
29 #include <linux/soc/ti/knav_qmss.h>
30 #include <linux/soc/ti/knav_dma.h>
34 #define NETCP_SOP_OFFSET (NET_IP_ALIGN + NET_SKB_PAD)
35 #define NETCP_NAPI_WEIGHT 64
36 #define NETCP_TX_TIMEOUT (5 * HZ)
37 #define NETCP_MIN_PACKET_SIZE ETH_ZLEN
38 #define NETCP_MAX_MCAST_ADDR 16
40 #define NETCP_EFUSE_REG_INDEX 0
42 #define NETCP_MOD_PROBE_SKIPPED 1
43 #define NETCP_MOD_PROBE_FAILED 2
45 #define NETCP_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \
46 NETIF_MSG_DRV | NETIF_MSG_LINK | \
47 NETIF_MSG_IFUP | NETIF_MSG_INTR | \
48 NETIF_MSG_PROBE | NETIF_MSG_TIMER | \
49 NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \
50 NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \
51 NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \
54 #define NETCP_EFUSE_ADDR_SWAP 2
56 #define knav_queue_get_id(q) knav_queue_device_control(q, \
57 KNAV_QUEUE_GET_ID, (unsigned long)NULL)
59 #define knav_queue_enable_notify(q) knav_queue_device_control(q, \
60 KNAV_QUEUE_ENABLE_NOTIFY, \
63 #define knav_queue_disable_notify(q) knav_queue_device_control(q, \
64 KNAV_QUEUE_DISABLE_NOTIFY, \
67 #define knav_queue_get_count(q) knav_queue_device_control(q, \
68 KNAV_QUEUE_GET_COUNT, (unsigned long)NULL)
70 #define for_each_netcp_module(module) \
71 list_for_each_entry(module, &netcp_modules, module_list)
73 #define for_each_netcp_device_module(netcp_device, inst_modpriv) \
74 list_for_each_entry(inst_modpriv, \
75 &((netcp_device)->modpriv_head), inst_list)
77 #define for_each_module(netcp, intf_modpriv) \
78 list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list)
80 /* Module management structures */
82 struct list_head device_list
;
83 struct list_head interface_head
;
84 struct list_head modpriv_head
;
85 struct device
*device
;
88 struct netcp_inst_modpriv
{
89 struct netcp_device
*netcp_device
;
90 struct netcp_module
*netcp_module
;
91 struct list_head inst_list
;
95 struct netcp_intf_modpriv
{
96 struct netcp_intf
*netcp_priv
;
97 struct netcp_module
*netcp_module
;
98 struct list_head intf_list
;
102 static LIST_HEAD(netcp_devices
);
103 static LIST_HEAD(netcp_modules
);
104 static DEFINE_MUTEX(netcp_modules_lock
);
106 static int netcp_debug_level
= -1;
107 module_param(netcp_debug_level
, int, 0);
108 MODULE_PARM_DESC(netcp_debug_level
, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");
110 /* Helper functions - Get/Set */
111 static void get_pkt_info(u32
*buff
, u32
*buff_len
, u32
*ndesc
,
112 struct knav_dma_desc
*desc
)
114 *buff_len
= desc
->buff_len
;
116 *ndesc
= desc
->next_desc
;
119 static void get_pad_info(u32
*pad0
, u32
*pad1
, struct knav_dma_desc
*desc
)
121 *pad0
= desc
->pad
[0];
122 *pad1
= desc
->pad
[1];
125 static void get_org_pkt_info(u32
*buff
, u32
*buff_len
,
126 struct knav_dma_desc
*desc
)
128 *buff
= desc
->orig_buff
;
129 *buff_len
= desc
->orig_len
;
132 static void get_words(u32
*words
, int num_words
, u32
*desc
)
136 for (i
= 0; i
< num_words
; i
++)
140 static void set_pkt_info(u32 buff
, u32 buff_len
, u32 ndesc
,
141 struct knav_dma_desc
*desc
)
143 desc
->buff_len
= buff_len
;
145 desc
->next_desc
= ndesc
;
148 static void set_desc_info(u32 desc_info
, u32 pkt_info
,
149 struct knav_dma_desc
*desc
)
151 desc
->desc_info
= desc_info
;
152 desc
->packet_info
= pkt_info
;
155 static void set_pad_info(u32 pad0
, u32 pad1
, struct knav_dma_desc
*desc
)
161 static void set_org_pkt_info(u32 buff
, u32 buff_len
,
162 struct knav_dma_desc
*desc
)
164 desc
->orig_buff
= buff
;
165 desc
->orig_len
= buff_len
;
168 static void set_words(u32
*words
, int num_words
, u32
*desc
)
172 for (i
= 0; i
< num_words
; i
++)
176 /* Read the e-fuse value as 32 bit values to be endian independent */
177 static int emac_arch_get_mac_addr(char *x
, void __iomem
*efuse_mac
, u32 swap
)
179 unsigned int addr0
, addr1
;
181 addr1
= readl(efuse_mac
+ 4);
182 addr0
= readl(efuse_mac
);
185 case NETCP_EFUSE_ADDR_SWAP
:
187 addr1
= readl(efuse_mac
);
193 x
[0] = (addr1
& 0x0000ff00) >> 8;
194 x
[1] = addr1
& 0x000000ff;
195 x
[2] = (addr0
& 0xff000000) >> 24;
196 x
[3] = (addr0
& 0x00ff0000) >> 16;
197 x
[4] = (addr0
& 0x0000ff00) >> 8;
198 x
[5] = addr0
& 0x000000ff;
203 static const char *netcp_node_name(struct device_node
*node
)
207 if (of_property_read_string(node
, "label", &name
) < 0)
214 /* Module management routines */
215 static int netcp_register_interface(struct netcp_intf
*netcp
)
219 ret
= register_netdev(netcp
->ndev
);
221 netcp
->netdev_registered
= true;
225 static int netcp_module_probe(struct netcp_device
*netcp_device
,
226 struct netcp_module
*module
)
228 struct device
*dev
= netcp_device
->device
;
229 struct device_node
*devices
, *interface
, *node
= dev
->of_node
;
230 struct device_node
*child
;
231 struct netcp_inst_modpriv
*inst_modpriv
;
232 struct netcp_intf
*netcp_intf
;
233 struct netcp_module
*tmp
;
234 bool primary_module_registered
= false;
237 /* Find this module in the sub-tree for this device */
238 devices
= of_get_child_by_name(node
, "netcp-devices");
240 dev_err(dev
, "could not find netcp-devices node\n");
241 return NETCP_MOD_PROBE_SKIPPED
;
244 for_each_available_child_of_node(devices
, child
) {
245 const char *name
= netcp_node_name(child
);
247 if (!strcasecmp(module
->name
, name
))
251 of_node_put(devices
);
252 /* If module not used for this device, skip it */
254 dev_warn(dev
, "module(%s) not used for device\n", module
->name
);
255 return NETCP_MOD_PROBE_SKIPPED
;
258 inst_modpriv
= devm_kzalloc(dev
, sizeof(*inst_modpriv
), GFP_KERNEL
);
264 inst_modpriv
->netcp_device
= netcp_device
;
265 inst_modpriv
->netcp_module
= module
;
266 list_add_tail(&inst_modpriv
->inst_list
, &netcp_device
->modpriv_head
);
268 ret
= module
->probe(netcp_device
, dev
, child
,
269 &inst_modpriv
->module_priv
);
272 dev_err(dev
, "Probe of module(%s) failed with %d\n",
274 list_del(&inst_modpriv
->inst_list
);
275 devm_kfree(dev
, inst_modpriv
);
276 return NETCP_MOD_PROBE_FAILED
;
279 /* Attach modules only if the primary module is probed */
280 for_each_netcp_module(tmp
) {
282 primary_module_registered
= true;
285 if (!primary_module_registered
)
288 /* Attach module to interfaces */
289 list_for_each_entry(netcp_intf
, &netcp_device
->interface_head
,
291 struct netcp_intf_modpriv
*intf_modpriv
;
293 /* If interface not registered then register now */
294 if (!netcp_intf
->netdev_registered
)
295 ret
= netcp_register_interface(netcp_intf
);
300 intf_modpriv
= devm_kzalloc(dev
, sizeof(*intf_modpriv
),
305 interface
= of_parse_phandle(netcp_intf
->node_interface
,
308 intf_modpriv
->netcp_priv
= netcp_intf
;
309 intf_modpriv
->netcp_module
= module
;
310 list_add_tail(&intf_modpriv
->intf_list
,
311 &netcp_intf
->module_head
);
313 ret
= module
->attach(inst_modpriv
->module_priv
,
314 netcp_intf
->ndev
, interface
,
315 &intf_modpriv
->module_priv
);
316 of_node_put(interface
);
318 dev_dbg(dev
, "Attach of module %s declined with %d\n",
320 list_del(&intf_modpriv
->intf_list
);
321 devm_kfree(dev
, intf_modpriv
);
328 int netcp_register_module(struct netcp_module
*module
)
330 struct netcp_device
*netcp_device
;
331 struct netcp_module
*tmp
;
335 WARN(1, "error registering netcp module: no name\n");
339 if (!module
->probe
) {
340 WARN(1, "error registering netcp module: no probe\n");
344 mutex_lock(&netcp_modules_lock
);
346 for_each_netcp_module(tmp
) {
347 if (!strcasecmp(tmp
->name
, module
->name
)) {
348 mutex_unlock(&netcp_modules_lock
);
352 list_add_tail(&module
->module_list
, &netcp_modules
);
354 list_for_each_entry(netcp_device
, &netcp_devices
, device_list
) {
355 ret
= netcp_module_probe(netcp_device
, module
);
360 mutex_unlock(&netcp_modules_lock
);
364 mutex_unlock(&netcp_modules_lock
);
365 netcp_unregister_module(module
);
368 EXPORT_SYMBOL_GPL(netcp_register_module
);
370 static void netcp_release_module(struct netcp_device
*netcp_device
,
371 struct netcp_module
*module
)
373 struct netcp_inst_modpriv
*inst_modpriv
, *inst_tmp
;
374 struct netcp_intf
*netcp_intf
, *netcp_tmp
;
375 struct device
*dev
= netcp_device
->device
;
377 /* Release the module from each interface */
378 list_for_each_entry_safe(netcp_intf
, netcp_tmp
,
379 &netcp_device
->interface_head
,
381 struct netcp_intf_modpriv
*intf_modpriv
, *intf_tmp
;
383 list_for_each_entry_safe(intf_modpriv
, intf_tmp
,
384 &netcp_intf
->module_head
,
386 if (intf_modpriv
->netcp_module
== module
) {
387 module
->release(intf_modpriv
->module_priv
);
388 list_del(&intf_modpriv
->intf_list
);
389 devm_kfree(dev
, intf_modpriv
);
395 /* Remove the module from each instance */
396 list_for_each_entry_safe(inst_modpriv
, inst_tmp
,
397 &netcp_device
->modpriv_head
, inst_list
) {
398 if (inst_modpriv
->netcp_module
== module
) {
399 module
->remove(netcp_device
,
400 inst_modpriv
->module_priv
);
401 list_del(&inst_modpriv
->inst_list
);
402 devm_kfree(dev
, inst_modpriv
);
408 void netcp_unregister_module(struct netcp_module
*module
)
410 struct netcp_device
*netcp_device
;
411 struct netcp_module
*module_tmp
;
413 mutex_lock(&netcp_modules_lock
);
415 list_for_each_entry(netcp_device
, &netcp_devices
, device_list
) {
416 netcp_release_module(netcp_device
, module
);
419 /* Remove the module from the module list */
420 for_each_netcp_module(module_tmp
) {
421 if (module
== module_tmp
) {
422 list_del(&module
->module_list
);
427 mutex_unlock(&netcp_modules_lock
);
429 EXPORT_SYMBOL_GPL(netcp_unregister_module
);
431 void *netcp_module_get_intf_data(struct netcp_module
*module
,
432 struct netcp_intf
*intf
)
434 struct netcp_intf_modpriv
*intf_modpriv
;
436 list_for_each_entry(intf_modpriv
, &intf
->module_head
, intf_list
)
437 if (intf_modpriv
->netcp_module
== module
)
438 return intf_modpriv
->module_priv
;
441 EXPORT_SYMBOL_GPL(netcp_module_get_intf_data
);
443 /* Module TX and RX Hook management */
444 struct netcp_hook_list
{
445 struct list_head list
;
446 netcp_hook_rtn
*hook_rtn
;
451 int netcp_register_txhook(struct netcp_intf
*netcp_priv
, int order
,
452 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
454 struct netcp_hook_list
*entry
;
455 struct netcp_hook_list
*next
;
458 entry
= devm_kzalloc(netcp_priv
->dev
, sizeof(*entry
), GFP_KERNEL
);
462 entry
->hook_rtn
= hook_rtn
;
463 entry
->hook_data
= hook_data
;
464 entry
->order
= order
;
466 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
467 list_for_each_entry(next
, &netcp_priv
->txhook_list_head
, list
) {
468 if (next
->order
> order
)
471 __list_add(&entry
->list
, next
->list
.prev
, &next
->list
);
472 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
476 EXPORT_SYMBOL_GPL(netcp_register_txhook
);
478 int netcp_unregister_txhook(struct netcp_intf
*netcp_priv
, int order
,
479 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
481 struct netcp_hook_list
*next
, *n
;
484 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
485 list_for_each_entry_safe(next
, n
, &netcp_priv
->txhook_list_head
, list
) {
486 if ((next
->order
== order
) &&
487 (next
->hook_rtn
== hook_rtn
) &&
488 (next
->hook_data
== hook_data
)) {
489 list_del(&next
->list
);
490 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
491 devm_kfree(netcp_priv
->dev
, next
);
495 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
498 EXPORT_SYMBOL_GPL(netcp_unregister_txhook
);
500 int netcp_register_rxhook(struct netcp_intf
*netcp_priv
, int order
,
501 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
503 struct netcp_hook_list
*entry
;
504 struct netcp_hook_list
*next
;
507 entry
= devm_kzalloc(netcp_priv
->dev
, sizeof(*entry
), GFP_KERNEL
);
511 entry
->hook_rtn
= hook_rtn
;
512 entry
->hook_data
= hook_data
;
513 entry
->order
= order
;
515 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
516 list_for_each_entry(next
, &netcp_priv
->rxhook_list_head
, list
) {
517 if (next
->order
> order
)
520 __list_add(&entry
->list
, next
->list
.prev
, &next
->list
);
521 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
526 int netcp_unregister_rxhook(struct netcp_intf
*netcp_priv
, int order
,
527 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
529 struct netcp_hook_list
*next
, *n
;
532 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
533 list_for_each_entry_safe(next
, n
, &netcp_priv
->rxhook_list_head
, list
) {
534 if ((next
->order
== order
) &&
535 (next
->hook_rtn
== hook_rtn
) &&
536 (next
->hook_data
== hook_data
)) {
537 list_del(&next
->list
);
538 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
539 devm_kfree(netcp_priv
->dev
, next
);
543 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
548 static void netcp_frag_free(bool is_frag
, void *ptr
)
556 static void netcp_free_rx_desc_chain(struct netcp_intf
*netcp
,
557 struct knav_dma_desc
*desc
)
559 struct knav_dma_desc
*ndesc
;
560 dma_addr_t dma_desc
, dma_buf
;
561 unsigned int buf_len
, dma_sz
= sizeof(*ndesc
);
565 get_words(&dma_desc
, 1, &desc
->next_desc
);
568 ndesc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma_desc
, dma_sz
);
569 if (unlikely(!ndesc
)) {
570 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
573 get_pkt_info(&dma_buf
, &tmp
, &dma_desc
, ndesc
);
574 get_pad_info((u32
*)&buf_ptr
, &tmp
, ndesc
);
575 dma_unmap_page(netcp
->dev
, dma_buf
, PAGE_SIZE
, DMA_FROM_DEVICE
);
576 __free_page(buf_ptr
);
577 knav_pool_desc_put(netcp
->rx_pool
, desc
);
580 get_pad_info((u32
*)&buf_ptr
, &buf_len
, desc
);
582 netcp_frag_free(buf_len
<= PAGE_SIZE
, buf_ptr
);
583 knav_pool_desc_put(netcp
->rx_pool
, desc
);
586 static void netcp_empty_rx_queue(struct netcp_intf
*netcp
)
588 struct knav_dma_desc
*desc
;
593 dma
= knav_queue_pop(netcp
->rx_queue
, &dma_sz
);
597 desc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma
, dma_sz
);
598 if (unlikely(!desc
)) {
599 dev_err(netcp
->ndev_dev
, "%s: failed to unmap Rx desc\n",
601 netcp
->ndev
->stats
.rx_errors
++;
604 netcp_free_rx_desc_chain(netcp
, desc
);
605 netcp
->ndev
->stats
.rx_dropped
++;
609 static int netcp_process_one_rx_packet(struct netcp_intf
*netcp
)
611 unsigned int dma_sz
, buf_len
, org_buf_len
;
612 struct knav_dma_desc
*desc
, *ndesc
;
613 unsigned int pkt_sz
= 0, accum_sz
;
614 struct netcp_hook_list
*rx_hook
;
615 dma_addr_t dma_desc
, dma_buff
;
616 struct netcp_packet p_info
;
621 dma_desc
= knav_queue_pop(netcp
->rx_queue
, &dma_sz
);
625 desc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma_desc
, dma_sz
);
626 if (unlikely(!desc
)) {
627 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
631 get_pkt_info(&dma_buff
, &buf_len
, &dma_desc
, desc
);
632 get_pad_info((u32
*)&org_buf_ptr
, &org_buf_len
, desc
);
634 if (unlikely(!org_buf_ptr
)) {
635 dev_err(netcp
->ndev_dev
, "NULL bufptr in desc\n");
639 pkt_sz
&= KNAV_DMA_DESC_PKT_LEN_MASK
;
641 dma_unmap_single(netcp
->dev
, dma_buff
, buf_len
, DMA_FROM_DEVICE
);
643 /* Build a new sk_buff for the primary buffer */
644 skb
= build_skb(org_buf_ptr
, org_buf_len
);
645 if (unlikely(!skb
)) {
646 dev_err(netcp
->ndev_dev
, "build_skb() failed\n");
650 /* update data, tail and len */
651 skb_reserve(skb
, NETCP_SOP_OFFSET
);
652 __skb_put(skb
, buf_len
);
654 /* Fill in the page fragment list */
658 ndesc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma_desc
, dma_sz
);
659 if (unlikely(!ndesc
)) {
660 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
664 get_pkt_info(&dma_buff
, &buf_len
, &dma_desc
, ndesc
);
665 get_pad_info((u32
*)&page
, &tmp
, ndesc
);
667 if (likely(dma_buff
&& buf_len
&& page
)) {
668 dma_unmap_page(netcp
->dev
, dma_buff
, PAGE_SIZE
,
671 dev_err(netcp
->ndev_dev
, "Bad Rx desc dma_buff(%p), len(%d), page(%p)\n",
672 (void *)dma_buff
, buf_len
, page
);
676 skb_add_rx_frag(skb
, skb_shinfo(skb
)->nr_frags
, page
,
677 offset_in_page(dma_buff
), buf_len
, PAGE_SIZE
);
680 /* Free the descriptor */
681 knav_pool_desc_put(netcp
->rx_pool
, ndesc
);
684 /* Free the primary descriptor */
685 knav_pool_desc_put(netcp
->rx_pool
, desc
);
687 /* check for packet len and warn */
688 if (unlikely(pkt_sz
!= accum_sz
))
689 dev_dbg(netcp
->ndev_dev
, "mismatch in packet size(%d) & sum of fragments(%d)\n",
692 /* Remove ethernet FCS from the packet */
693 __pskb_trim(skb
, skb
->len
- ETH_FCS_LEN
);
695 /* Call each of the RX hooks */
697 p_info
.rxtstamp_complete
= false;
698 list_for_each_entry(rx_hook
, &netcp
->rxhook_list_head
, list
) {
701 ret
= rx_hook
->hook_rtn(rx_hook
->order
, rx_hook
->hook_data
,
704 dev_err(netcp
->ndev_dev
, "RX hook %d failed: %d\n",
705 rx_hook
->order
, ret
);
706 netcp
->ndev
->stats
.rx_errors
++;
712 netcp
->ndev
->stats
.rx_packets
++;
713 netcp
->ndev
->stats
.rx_bytes
+= skb
->len
;
715 /* push skb up the stack */
716 skb
->protocol
= eth_type_trans(skb
, netcp
->ndev
);
717 netif_receive_skb(skb
);
721 netcp_free_rx_desc_chain(netcp
, desc
);
722 netcp
->ndev
->stats
.rx_errors
++;
726 static int netcp_process_rx_packets(struct netcp_intf
*netcp
,
731 for (i
= 0; (i
< budget
) && !netcp_process_one_rx_packet(netcp
); i
++)
736 /* Release descriptors and attached buffers from Rx FDQ */
737 static void netcp_free_rx_buf(struct netcp_intf
*netcp
, int fdq
)
739 struct knav_dma_desc
*desc
;
740 unsigned int buf_len
, dma_sz
;
745 /* Allocate descriptor */
746 while ((dma
= knav_queue_pop(netcp
->rx_fdq
[fdq
], &dma_sz
))) {
747 desc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma
, dma_sz
);
748 if (unlikely(!desc
)) {
749 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
753 get_org_pkt_info(&dma
, &buf_len
, desc
);
754 get_pad_info((u32
*)&buf_ptr
, &tmp
, desc
);
756 if (unlikely(!dma
)) {
757 dev_err(netcp
->ndev_dev
, "NULL orig_buff in desc\n");
758 knav_pool_desc_put(netcp
->rx_pool
, desc
);
762 if (unlikely(!buf_ptr
)) {
763 dev_err(netcp
->ndev_dev
, "NULL bufptr in desc\n");
764 knav_pool_desc_put(netcp
->rx_pool
, desc
);
769 dma_unmap_single(netcp
->dev
, dma
, buf_len
,
771 netcp_frag_free((buf_len
<= PAGE_SIZE
), buf_ptr
);
773 dma_unmap_page(netcp
->dev
, dma
, buf_len
,
775 __free_page(buf_ptr
);
778 knav_pool_desc_put(netcp
->rx_pool
, desc
);
782 static void netcp_rxpool_free(struct netcp_intf
*netcp
)
786 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&&
787 !IS_ERR_OR_NULL(netcp
->rx_fdq
[i
]); i
++)
788 netcp_free_rx_buf(netcp
, i
);
790 if (knav_pool_count(netcp
->rx_pool
) != netcp
->rx_pool_size
)
791 dev_err(netcp
->ndev_dev
, "Lost Rx (%d) descriptors\n",
792 netcp
->rx_pool_size
- knav_pool_count(netcp
->rx_pool
));
794 knav_pool_destroy(netcp
->rx_pool
);
795 netcp
->rx_pool
= NULL
;
798 static void netcp_allocate_rx_buf(struct netcp_intf
*netcp
, int fdq
)
800 struct knav_dma_desc
*hwdesc
;
801 unsigned int buf_len
, dma_sz
;
802 u32 desc_info
, pkt_info
;
808 /* Allocate descriptor */
809 hwdesc
= knav_pool_desc_get(netcp
->rx_pool
);
810 if (IS_ERR_OR_NULL(hwdesc
)) {
811 dev_dbg(netcp
->ndev_dev
, "out of rx pool desc\n");
815 if (likely(fdq
== 0)) {
816 unsigned int primary_buf_len
;
817 /* Allocate a primary receive queue entry */
818 buf_len
= netcp
->rx_buffer_sizes
[0] + NETCP_SOP_OFFSET
;
819 primary_buf_len
= SKB_DATA_ALIGN(buf_len
) +
820 SKB_DATA_ALIGN(sizeof(struct skb_shared_info
));
822 if (primary_buf_len
<= PAGE_SIZE
) {
823 bufptr
= netdev_alloc_frag(primary_buf_len
);
824 pad
[1] = primary_buf_len
;
826 bufptr
= kmalloc(primary_buf_len
, GFP_ATOMIC
|
827 GFP_DMA32
| __GFP_COLD
);
831 if (unlikely(!bufptr
)) {
832 dev_warn_ratelimited(netcp
->ndev_dev
, "Primary RX buffer alloc failed\n");
835 dma
= dma_map_single(netcp
->dev
, bufptr
, buf_len
,
837 pad
[0] = (u32
)bufptr
;
840 /* Allocate a secondary receive queue entry */
841 page
= alloc_page(GFP_ATOMIC
| GFP_DMA32
| __GFP_COLD
);
842 if (unlikely(!page
)) {
843 dev_warn_ratelimited(netcp
->ndev_dev
, "Secondary page alloc failed\n");
847 dma
= dma_map_page(netcp
->dev
, page
, 0, buf_len
, DMA_TO_DEVICE
);
852 desc_info
= KNAV_DMA_DESC_PS_INFO_IN_DESC
;
853 desc_info
|= buf_len
& KNAV_DMA_DESC_PKT_LEN_MASK
;
854 pkt_info
= KNAV_DMA_DESC_HAS_EPIB
;
855 pkt_info
|= KNAV_DMA_NUM_PS_WORDS
<< KNAV_DMA_DESC_PSLEN_SHIFT
;
856 pkt_info
|= (netcp
->rx_queue_id
& KNAV_DMA_DESC_RETQ_MASK
) <<
857 KNAV_DMA_DESC_RETQ_SHIFT
;
858 set_org_pkt_info(dma
, buf_len
, hwdesc
);
859 set_pad_info(pad
[0], pad
[1], hwdesc
);
860 set_desc_info(desc_info
, pkt_info
, hwdesc
);
863 knav_pool_desc_map(netcp
->rx_pool
, hwdesc
, sizeof(*hwdesc
), &dma
,
865 knav_queue_push(netcp
->rx_fdq
[fdq
], dma
, sizeof(*hwdesc
), 0);
869 knav_pool_desc_put(netcp
->rx_pool
, hwdesc
);
872 /* Refill Rx FDQ with descriptors & attached buffers */
873 static void netcp_rxpool_refill(struct netcp_intf
*netcp
)
875 u32 fdq_deficit
[KNAV_DMA_FDQ_PER_CHAN
] = {0};
878 /* Calculate the FDQ deficit and refill */
879 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&& netcp
->rx_fdq
[i
]; i
++) {
880 fdq_deficit
[i
] = netcp
->rx_queue_depths
[i
] -
881 knav_queue_get_count(netcp
->rx_fdq
[i
]);
883 while (fdq_deficit
[i
]--)
884 netcp_allocate_rx_buf(netcp
, i
);
889 static int netcp_rx_poll(struct napi_struct
*napi
, int budget
)
891 struct netcp_intf
*netcp
= container_of(napi
, struct netcp_intf
,
893 unsigned int packets
;
895 packets
= netcp_process_rx_packets(netcp
, budget
);
897 if (packets
< budget
) {
898 napi_complete(&netcp
->rx_napi
);
899 knav_queue_enable_notify(netcp
->rx_queue
);
902 netcp_rxpool_refill(netcp
);
906 static void netcp_rx_notify(void *arg
)
908 struct netcp_intf
*netcp
= arg
;
910 knav_queue_disable_notify(netcp
->rx_queue
);
911 napi_schedule(&netcp
->rx_napi
);
914 static void netcp_free_tx_desc_chain(struct netcp_intf
*netcp
,
915 struct knav_dma_desc
*desc
,
916 unsigned int desc_sz
)
918 struct knav_dma_desc
*ndesc
= desc
;
919 dma_addr_t dma_desc
, dma_buf
;
920 unsigned int buf_len
;
923 get_pkt_info(&dma_buf
, &buf_len
, &dma_desc
, ndesc
);
925 if (dma_buf
&& buf_len
)
926 dma_unmap_single(netcp
->dev
, dma_buf
, buf_len
,
929 dev_warn(netcp
->ndev_dev
, "bad Tx desc buf(%p), len(%d)\n",
930 (void *)dma_buf
, buf_len
);
932 knav_pool_desc_put(netcp
->tx_pool
, ndesc
);
935 ndesc
= knav_pool_desc_unmap(netcp
->tx_pool
, dma_desc
,
938 dev_err(netcp
->ndev_dev
, "failed to unmap Tx desc\n");
943 static int netcp_process_tx_compl_packets(struct netcp_intf
*netcp
,
946 struct knav_dma_desc
*desc
;
954 dma
= knav_queue_pop(netcp
->tx_compl_q
, &dma_sz
);
957 desc
= knav_pool_desc_unmap(netcp
->tx_pool
, dma
, dma_sz
);
958 if (unlikely(!desc
)) {
959 dev_err(netcp
->ndev_dev
, "failed to unmap Tx desc\n");
960 netcp
->ndev
->stats
.tx_errors
++;
964 get_pad_info((u32
*)&skb
, &tmp
, desc
);
965 netcp_free_tx_desc_chain(netcp
, desc
, dma_sz
);
967 dev_err(netcp
->ndev_dev
, "No skb in Tx desc\n");
968 netcp
->ndev
->stats
.tx_errors
++;
972 if (netif_subqueue_stopped(netcp
->ndev
, skb
) &&
973 netif_running(netcp
->ndev
) &&
974 (knav_pool_count(netcp
->tx_pool
) >
975 netcp
->tx_resume_threshold
)) {
976 u16 subqueue
= skb_get_queue_mapping(skb
);
978 netif_wake_subqueue(netcp
->ndev
, subqueue
);
981 netcp
->ndev
->stats
.tx_packets
++;
982 netcp
->ndev
->stats
.tx_bytes
+= skb
->len
;
989 static int netcp_tx_poll(struct napi_struct
*napi
, int budget
)
992 struct netcp_intf
*netcp
= container_of(napi
, struct netcp_intf
,
995 packets
= netcp_process_tx_compl_packets(netcp
, budget
);
996 if (packets
< budget
) {
997 napi_complete(&netcp
->tx_napi
);
998 knav_queue_enable_notify(netcp
->tx_compl_q
);
1004 static void netcp_tx_notify(void *arg
)
1006 struct netcp_intf
*netcp
= arg
;
1008 knav_queue_disable_notify(netcp
->tx_compl_q
);
1009 napi_schedule(&netcp
->tx_napi
);
1012 static struct knav_dma_desc
*
1013 netcp_tx_map_skb(struct sk_buff
*skb
, struct netcp_intf
*netcp
)
1015 struct knav_dma_desc
*desc
, *ndesc
, *pdesc
;
1016 unsigned int pkt_len
= skb_headlen(skb
);
1017 struct device
*dev
= netcp
->dev
;
1018 dma_addr_t dma_addr
;
1019 unsigned int dma_sz
;
1022 /* Map the linear buffer */
1023 dma_addr
= dma_map_single(dev
, skb
->data
, pkt_len
, DMA_TO_DEVICE
);
1024 if (unlikely(!dma_addr
)) {
1025 dev_err(netcp
->ndev_dev
, "Failed to map skb buffer\n");
1029 desc
= knav_pool_desc_get(netcp
->tx_pool
);
1030 if (unlikely(IS_ERR_OR_NULL(desc
))) {
1031 dev_err(netcp
->ndev_dev
, "out of TX desc\n");
1032 dma_unmap_single(dev
, dma_addr
, pkt_len
, DMA_TO_DEVICE
);
1036 set_pkt_info(dma_addr
, pkt_len
, 0, desc
);
1037 if (skb_is_nonlinear(skb
)) {
1038 prefetchw(skb_shinfo(skb
));
1040 desc
->next_desc
= 0;
1046 /* Handle the case where skb is fragmented in pages */
1047 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; i
++) {
1048 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
1049 struct page
*page
= skb_frag_page(frag
);
1050 u32 page_offset
= frag
->page_offset
;
1051 u32 buf_len
= skb_frag_size(frag
);
1052 dma_addr_t desc_dma
;
1055 dma_addr
= dma_map_page(dev
, page
, page_offset
, buf_len
,
1057 if (unlikely(!dma_addr
)) {
1058 dev_err(netcp
->ndev_dev
, "Failed to map skb page\n");
1062 ndesc
= knav_pool_desc_get(netcp
->tx_pool
);
1063 if (unlikely(IS_ERR_OR_NULL(ndesc
))) {
1064 dev_err(netcp
->ndev_dev
, "out of TX desc for frags\n");
1065 dma_unmap_page(dev
, dma_addr
, buf_len
, DMA_TO_DEVICE
);
1069 desc_dma
= knav_pool_desc_virt_to_dma(netcp
->tx_pool
,
1072 (netcp
->tx_compl_qid
& KNAV_DMA_DESC_RETQ_MASK
) <<
1073 KNAV_DMA_DESC_RETQ_SHIFT
;
1074 set_pkt_info(dma_addr
, buf_len
, 0, ndesc
);
1075 set_words(&desc_dma
, 1, &pdesc
->next_desc
);
1078 knav_pool_desc_map(netcp
->tx_pool
, pdesc
,
1079 sizeof(*pdesc
), &desc_dma
, &dma_sz
);
1083 knav_pool_desc_map(netcp
->tx_pool
, pdesc
, sizeof(*pdesc
),
1084 &dma_addr
, &dma_sz
);
1086 /* frag list based linkage is not supported for now. */
1087 if (skb_shinfo(skb
)->frag_list
) {
1088 dev_err_ratelimited(netcp
->ndev_dev
, "NETIF_F_FRAGLIST not supported\n");
1093 WARN_ON(pkt_len
!= skb
->len
);
1095 pkt_len
&= KNAV_DMA_DESC_PKT_LEN_MASK
;
1096 set_words(&pkt_len
, 1, &desc
->desc_info
);
1100 netcp_free_tx_desc_chain(netcp
, desc
, sizeof(*desc
));
1104 static int netcp_tx_submit_skb(struct netcp_intf
*netcp
,
1105 struct sk_buff
*skb
,
1106 struct knav_dma_desc
*desc
)
1108 struct netcp_tx_pipe
*tx_pipe
= NULL
;
1109 struct netcp_hook_list
*tx_hook
;
1110 struct netcp_packet p_info
;
1111 unsigned int dma_sz
;
1116 p_info
.netcp
= netcp
;
1118 p_info
.tx_pipe
= NULL
;
1119 p_info
.psdata_len
= 0;
1120 p_info
.ts_context
= NULL
;
1121 p_info
.txtstamp_complete
= NULL
;
1122 p_info
.epib
= desc
->epib
;
1123 p_info
.psdata
= desc
->psdata
;
1124 memset(p_info
.epib
, 0, KNAV_DMA_NUM_EPIB_WORDS
* sizeof(u32
));
1126 /* Find out where to inject the packet for transmission */
1127 list_for_each_entry(tx_hook
, &netcp
->txhook_list_head
, list
) {
1128 ret
= tx_hook
->hook_rtn(tx_hook
->order
, tx_hook
->hook_data
,
1130 if (unlikely(ret
!= 0)) {
1131 dev_err(netcp
->ndev_dev
, "TX hook %d rejected the packet with reason(%d)\n",
1132 tx_hook
->order
, ret
);
1133 ret
= (ret
< 0) ? ret
: NETDEV_TX_OK
;
1138 /* Make sure some TX hook claimed the packet */
1139 tx_pipe
= p_info
.tx_pipe
;
1141 dev_err(netcp
->ndev_dev
, "No TX hook claimed the packet!\n");
1146 /* update descriptor */
1147 if (p_info
.psdata_len
) {
1148 u32
*psdata
= p_info
.psdata
;
1150 memmove(p_info
.psdata
, p_info
.psdata
+ p_info
.psdata_len
,
1152 set_words(psdata
, p_info
.psdata_len
, psdata
);
1153 tmp
|= (p_info
.psdata_len
& KNAV_DMA_DESC_PSLEN_MASK
) <<
1154 KNAV_DMA_DESC_PSLEN_SHIFT
;
1157 tmp
|= KNAV_DMA_DESC_HAS_EPIB
|
1158 ((netcp
->tx_compl_qid
& KNAV_DMA_DESC_RETQ_MASK
) <<
1159 KNAV_DMA_DESC_RETQ_SHIFT
);
1161 if (!(tx_pipe
->flags
& SWITCH_TO_PORT_IN_TAGINFO
)) {
1162 tmp
|= ((tx_pipe
->switch_to_port
& KNAV_DMA_DESC_PSFLAG_MASK
) <<
1163 KNAV_DMA_DESC_PSFLAG_SHIFT
);
1166 set_words(&tmp
, 1, &desc
->packet_info
);
1167 set_words((u32
*)&skb
, 1, &desc
->pad
[0]);
1169 if (tx_pipe
->flags
& SWITCH_TO_PORT_IN_TAGINFO
) {
1170 tmp
= tx_pipe
->switch_to_port
;
1171 set_words((u32
*)&tmp
, 1, &desc
->tag_info
);
1174 /* submit packet descriptor */
1175 ret
= knav_pool_desc_map(netcp
->tx_pool
, desc
, sizeof(*desc
), &dma
,
1177 if (unlikely(ret
)) {
1178 dev_err(netcp
->ndev_dev
, "%s() failed to map desc\n", __func__
);
1182 skb_tx_timestamp(skb
);
1183 knav_queue_push(tx_pipe
->dma_queue
, dma
, dma_sz
, 0);
1189 /* Submit the packet */
1190 static int netcp_ndo_start_xmit(struct sk_buff
*skb
, struct net_device
*ndev
)
1192 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1193 int subqueue
= skb_get_queue_mapping(skb
);
1194 struct knav_dma_desc
*desc
;
1195 int desc_count
, ret
= 0;
1197 if (unlikely(skb
->len
<= 0)) {
1199 return NETDEV_TX_OK
;
1202 if (unlikely(skb
->len
< NETCP_MIN_PACKET_SIZE
)) {
1203 ret
= skb_padto(skb
, NETCP_MIN_PACKET_SIZE
);
1205 /* If we get here, the skb has already been dropped */
1206 dev_warn(netcp
->ndev_dev
, "padding failed (%d), packet dropped\n",
1208 ndev
->stats
.tx_dropped
++;
1211 skb
->len
= NETCP_MIN_PACKET_SIZE
;
1214 desc
= netcp_tx_map_skb(skb
, netcp
);
1215 if (unlikely(!desc
)) {
1216 netif_stop_subqueue(ndev
, subqueue
);
1221 ret
= netcp_tx_submit_skb(netcp
, skb
, desc
);
1225 ndev
->trans_start
= jiffies
;
1227 /* Check Tx pool count & stop subqueue if needed */
1228 desc_count
= knav_pool_count(netcp
->tx_pool
);
1229 if (desc_count
< netcp
->tx_pause_threshold
) {
1230 dev_dbg(netcp
->ndev_dev
, "pausing tx, count(%d)\n", desc_count
);
1231 netif_stop_subqueue(ndev
, subqueue
);
1233 return NETDEV_TX_OK
;
1236 ndev
->stats
.tx_dropped
++;
1238 netcp_free_tx_desc_chain(netcp
, desc
, sizeof(*desc
));
1243 int netcp_txpipe_close(struct netcp_tx_pipe
*tx_pipe
)
1245 if (tx_pipe
->dma_channel
) {
1246 knav_dma_close_channel(tx_pipe
->dma_channel
);
1247 tx_pipe
->dma_channel
= NULL
;
1251 EXPORT_SYMBOL_GPL(netcp_txpipe_close
);
1253 int netcp_txpipe_open(struct netcp_tx_pipe
*tx_pipe
)
1255 struct device
*dev
= tx_pipe
->netcp_device
->device
;
1256 struct knav_dma_cfg config
;
1260 memset(&config
, 0, sizeof(config
));
1261 config
.direction
= DMA_MEM_TO_DEV
;
1262 config
.u
.tx
.filt_einfo
= false;
1263 config
.u
.tx
.filt_pswords
= false;
1264 config
.u
.tx
.priority
= DMA_PRIO_MED_L
;
1266 tx_pipe
->dma_channel
= knav_dma_open_channel(dev
,
1267 tx_pipe
->dma_chan_name
, &config
);
1268 if (IS_ERR_OR_NULL(tx_pipe
->dma_channel
)) {
1269 dev_err(dev
, "failed opening tx chan(%s)\n",
1270 tx_pipe
->dma_chan_name
);
1274 snprintf(name
, sizeof(name
), "tx-pipe-%s", dev_name(dev
));
1275 tx_pipe
->dma_queue
= knav_queue_open(name
, tx_pipe
->dma_queue_id
,
1277 if (IS_ERR(tx_pipe
->dma_queue
)) {
1278 dev_err(dev
, "Could not open DMA queue for channel \"%s\": %d\n",
1280 ret
= PTR_ERR(tx_pipe
->dma_queue
);
1284 dev_dbg(dev
, "opened tx pipe %s\n", name
);
1288 if (!IS_ERR_OR_NULL(tx_pipe
->dma_channel
))
1289 knav_dma_close_channel(tx_pipe
->dma_channel
);
1290 tx_pipe
->dma_channel
= NULL
;
1293 EXPORT_SYMBOL_GPL(netcp_txpipe_open
);
1295 int netcp_txpipe_init(struct netcp_tx_pipe
*tx_pipe
,
1296 struct netcp_device
*netcp_device
,
1297 const char *dma_chan_name
, unsigned int dma_queue_id
)
1299 memset(tx_pipe
, 0, sizeof(*tx_pipe
));
1300 tx_pipe
->netcp_device
= netcp_device
;
1301 tx_pipe
->dma_chan_name
= dma_chan_name
;
1302 tx_pipe
->dma_queue_id
= dma_queue_id
;
1305 EXPORT_SYMBOL_GPL(netcp_txpipe_init
);
1307 static struct netcp_addr
*netcp_addr_find(struct netcp_intf
*netcp
,
1309 enum netcp_addr_type type
)
1311 struct netcp_addr
*naddr
;
1313 list_for_each_entry(naddr
, &netcp
->addr_list
, node
) {
1314 if (naddr
->type
!= type
)
1316 if (addr
&& memcmp(addr
, naddr
->addr
, ETH_ALEN
))
1324 static struct netcp_addr
*netcp_addr_add(struct netcp_intf
*netcp
,
1326 enum netcp_addr_type type
)
1328 struct netcp_addr
*naddr
;
1330 naddr
= devm_kmalloc(netcp
->dev
, sizeof(*naddr
), GFP_ATOMIC
);
1336 naddr
->netcp
= netcp
;
1338 ether_addr_copy(naddr
->addr
, addr
);
1340 eth_zero_addr(naddr
->addr
);
1341 list_add_tail(&naddr
->node
, &netcp
->addr_list
);
1346 static void netcp_addr_del(struct netcp_intf
*netcp
, struct netcp_addr
*naddr
)
1348 list_del(&naddr
->node
);
1349 devm_kfree(netcp
->dev
, naddr
);
1352 static void netcp_addr_clear_mark(struct netcp_intf
*netcp
)
1354 struct netcp_addr
*naddr
;
1356 list_for_each_entry(naddr
, &netcp
->addr_list
, node
)
1360 static void netcp_addr_add_mark(struct netcp_intf
*netcp
, const u8
*addr
,
1361 enum netcp_addr_type type
)
1363 struct netcp_addr
*naddr
;
1365 naddr
= netcp_addr_find(netcp
, addr
, type
);
1367 naddr
->flags
|= ADDR_VALID
;
1371 naddr
= netcp_addr_add(netcp
, addr
, type
);
1372 if (!WARN_ON(!naddr
))
1373 naddr
->flags
|= ADDR_NEW
;
1376 static void netcp_addr_sweep_del(struct netcp_intf
*netcp
)
1378 struct netcp_addr
*naddr
, *tmp
;
1379 struct netcp_intf_modpriv
*priv
;
1380 struct netcp_module
*module
;
1383 list_for_each_entry_safe(naddr
, tmp
, &netcp
->addr_list
, node
) {
1384 if (naddr
->flags
& (ADDR_VALID
| ADDR_NEW
))
1386 dev_dbg(netcp
->ndev_dev
, "deleting address %pM, type %x\n",
1387 naddr
->addr
, naddr
->type
);
1388 mutex_lock(&netcp_modules_lock
);
1389 for_each_module(netcp
, priv
) {
1390 module
= priv
->netcp_module
;
1391 if (!module
->del_addr
)
1393 error
= module
->del_addr(priv
->module_priv
,
1397 mutex_unlock(&netcp_modules_lock
);
1398 netcp_addr_del(netcp
, naddr
);
1402 static void netcp_addr_sweep_add(struct netcp_intf
*netcp
)
1404 struct netcp_addr
*naddr
, *tmp
;
1405 struct netcp_intf_modpriv
*priv
;
1406 struct netcp_module
*module
;
1409 list_for_each_entry_safe(naddr
, tmp
, &netcp
->addr_list
, node
) {
1410 if (!(naddr
->flags
& ADDR_NEW
))
1412 dev_dbg(netcp
->ndev_dev
, "adding address %pM, type %x\n",
1413 naddr
->addr
, naddr
->type
);
1414 mutex_lock(&netcp_modules_lock
);
1415 for_each_module(netcp
, priv
) {
1416 module
= priv
->netcp_module
;
1417 if (!module
->add_addr
)
1419 error
= module
->add_addr(priv
->module_priv
, naddr
);
1422 mutex_unlock(&netcp_modules_lock
);
1426 static void netcp_set_rx_mode(struct net_device
*ndev
)
1428 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1429 struct netdev_hw_addr
*ndev_addr
;
1432 promisc
= (ndev
->flags
& IFF_PROMISC
||
1433 ndev
->flags
& IFF_ALLMULTI
||
1434 netdev_mc_count(ndev
) > NETCP_MAX_MCAST_ADDR
);
1436 /* first clear all marks */
1437 netcp_addr_clear_mark(netcp
);
1439 /* next add new entries, mark existing ones */
1440 netcp_addr_add_mark(netcp
, ndev
->broadcast
, ADDR_BCAST
);
1441 for_each_dev_addr(ndev
, ndev_addr
)
1442 netcp_addr_add_mark(netcp
, ndev_addr
->addr
, ADDR_DEV
);
1443 netdev_for_each_uc_addr(ndev_addr
, ndev
)
1444 netcp_addr_add_mark(netcp
, ndev_addr
->addr
, ADDR_UCAST
);
1445 netdev_for_each_mc_addr(ndev_addr
, ndev
)
1446 netcp_addr_add_mark(netcp
, ndev_addr
->addr
, ADDR_MCAST
);
1449 netcp_addr_add_mark(netcp
, NULL
, ADDR_ANY
);
1451 /* finally sweep and callout into modules */
1452 netcp_addr_sweep_del(netcp
);
1453 netcp_addr_sweep_add(netcp
);
1456 static void netcp_free_navigator_resources(struct netcp_intf
*netcp
)
1460 if (netcp
->rx_channel
) {
1461 knav_dma_close_channel(netcp
->rx_channel
);
1462 netcp
->rx_channel
= NULL
;
1465 if (!IS_ERR_OR_NULL(netcp
->rx_pool
))
1466 netcp_rxpool_free(netcp
);
1468 if (!IS_ERR_OR_NULL(netcp
->rx_queue
)) {
1469 knav_queue_close(netcp
->rx_queue
);
1470 netcp
->rx_queue
= NULL
;
1473 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&&
1474 !IS_ERR_OR_NULL(netcp
->rx_fdq
[i
]) ; ++i
) {
1475 knav_queue_close(netcp
->rx_fdq
[i
]);
1476 netcp
->rx_fdq
[i
] = NULL
;
1479 if (!IS_ERR_OR_NULL(netcp
->tx_compl_q
)) {
1480 knav_queue_close(netcp
->tx_compl_q
);
1481 netcp
->tx_compl_q
= NULL
;
1484 if (!IS_ERR_OR_NULL(netcp
->tx_pool
)) {
1485 knav_pool_destroy(netcp
->tx_pool
);
1486 netcp
->tx_pool
= NULL
;
1490 static int netcp_setup_navigator_resources(struct net_device
*ndev
)
1492 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1493 struct knav_queue_notify_config notify_cfg
;
1494 struct knav_dma_cfg config
;
1500 /* Create Rx/Tx descriptor pools */
1501 snprintf(name
, sizeof(name
), "rx-pool-%s", ndev
->name
);
1502 netcp
->rx_pool
= knav_pool_create(name
, netcp
->rx_pool_size
,
1503 netcp
->rx_pool_region_id
);
1504 if (IS_ERR_OR_NULL(netcp
->rx_pool
)) {
1505 dev_err(netcp
->ndev_dev
, "Couldn't create rx pool\n");
1506 ret
= PTR_ERR(netcp
->rx_pool
);
1510 snprintf(name
, sizeof(name
), "tx-pool-%s", ndev
->name
);
1511 netcp
->tx_pool
= knav_pool_create(name
, netcp
->tx_pool_size
,
1512 netcp
->tx_pool_region_id
);
1513 if (IS_ERR_OR_NULL(netcp
->tx_pool
)) {
1514 dev_err(netcp
->ndev_dev
, "Couldn't create tx pool\n");
1515 ret
= PTR_ERR(netcp
->tx_pool
);
1519 /* open Tx completion queue */
1520 snprintf(name
, sizeof(name
), "tx-compl-%s", ndev
->name
);
1521 netcp
->tx_compl_q
= knav_queue_open(name
, netcp
->tx_compl_qid
, 0);
1522 if (IS_ERR_OR_NULL(netcp
->tx_compl_q
)) {
1523 ret
= PTR_ERR(netcp
->tx_compl_q
);
1526 netcp
->tx_compl_qid
= knav_queue_get_id(netcp
->tx_compl_q
);
1528 /* Set notification for Tx completion */
1529 notify_cfg
.fn
= netcp_tx_notify
;
1530 notify_cfg
.fn_arg
= netcp
;
1531 ret
= knav_queue_device_control(netcp
->tx_compl_q
,
1532 KNAV_QUEUE_SET_NOTIFIER
,
1533 (unsigned long)¬ify_cfg
);
1537 knav_queue_disable_notify(netcp
->tx_compl_q
);
1539 /* open Rx completion queue */
1540 snprintf(name
, sizeof(name
), "rx-compl-%s", ndev
->name
);
1541 netcp
->rx_queue
= knav_queue_open(name
, netcp
->rx_queue_id
, 0);
1542 if (IS_ERR_OR_NULL(netcp
->rx_queue
)) {
1543 ret
= PTR_ERR(netcp
->rx_queue
);
1546 netcp
->rx_queue_id
= knav_queue_get_id(netcp
->rx_queue
);
1548 /* Set notification for Rx completion */
1549 notify_cfg
.fn
= netcp_rx_notify
;
1550 notify_cfg
.fn_arg
= netcp
;
1551 ret
= knav_queue_device_control(netcp
->rx_queue
,
1552 KNAV_QUEUE_SET_NOTIFIER
,
1553 (unsigned long)¬ify_cfg
);
1557 knav_queue_disable_notify(netcp
->rx_queue
);
1560 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&&
1561 netcp
->rx_queue_depths
[i
] && netcp
->rx_buffer_sizes
[i
]; ++i
) {
1562 snprintf(name
, sizeof(name
), "rx-fdq-%s-%d", ndev
->name
, i
);
1563 netcp
->rx_fdq
[i
] = knav_queue_open(name
, KNAV_QUEUE_GP
, 0);
1564 if (IS_ERR_OR_NULL(netcp
->rx_fdq
[i
])) {
1565 ret
= PTR_ERR(netcp
->rx_fdq
[i
]);
1570 memset(&config
, 0, sizeof(config
));
1571 config
.direction
= DMA_DEV_TO_MEM
;
1572 config
.u
.rx
.einfo_present
= true;
1573 config
.u
.rx
.psinfo_present
= true;
1574 config
.u
.rx
.err_mode
= DMA_DROP
;
1575 config
.u
.rx
.desc_type
= DMA_DESC_HOST
;
1576 config
.u
.rx
.psinfo_at_sop
= false;
1577 config
.u
.rx
.sop_offset
= NETCP_SOP_OFFSET
;
1578 config
.u
.rx
.dst_q
= netcp
->rx_queue_id
;
1579 config
.u
.rx
.thresh
= DMA_THRESH_NONE
;
1581 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
; ++i
) {
1582 if (netcp
->rx_fdq
[i
])
1583 last_fdq
= knav_queue_get_id(netcp
->rx_fdq
[i
]);
1584 config
.u
.rx
.fdq
[i
] = last_fdq
;
1587 netcp
->rx_channel
= knav_dma_open_channel(netcp
->netcp_device
->device
,
1588 netcp
->dma_chan_name
, &config
);
1589 if (IS_ERR_OR_NULL(netcp
->rx_channel
)) {
1590 dev_err(netcp
->ndev_dev
, "failed opening rx chan(%s\n",
1591 netcp
->dma_chan_name
);
1595 dev_dbg(netcp
->ndev_dev
, "opened RX channel: %p\n", netcp
->rx_channel
);
1599 netcp_free_navigator_resources(netcp
);
1603 /* Open the device */
1604 static int netcp_ndo_open(struct net_device
*ndev
)
1606 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1607 struct netcp_intf_modpriv
*intf_modpriv
;
1608 struct netcp_module
*module
;
1611 netif_carrier_off(ndev
);
1612 ret
= netcp_setup_navigator_resources(ndev
);
1614 dev_err(netcp
->ndev_dev
, "Failed to setup navigator resources\n");
1618 mutex_lock(&netcp_modules_lock
);
1619 for_each_module(netcp
, intf_modpriv
) {
1620 module
= intf_modpriv
->netcp_module
;
1622 ret
= module
->open(intf_modpriv
->module_priv
, ndev
);
1624 dev_err(netcp
->ndev_dev
, "module open failed\n");
1629 mutex_unlock(&netcp_modules_lock
);
1631 napi_enable(&netcp
->rx_napi
);
1632 napi_enable(&netcp
->tx_napi
);
1633 knav_queue_enable_notify(netcp
->tx_compl_q
);
1634 knav_queue_enable_notify(netcp
->rx_queue
);
1635 netcp_rxpool_refill(netcp
);
1636 netif_tx_wake_all_queues(ndev
);
1637 dev_dbg(netcp
->ndev_dev
, "netcp device %s opened\n", ndev
->name
);
1641 for_each_module(netcp
, intf_modpriv
) {
1642 module
= intf_modpriv
->netcp_module
;
1644 module
->close(intf_modpriv
->module_priv
, ndev
);
1646 mutex_unlock(&netcp_modules_lock
);
1649 netcp_free_navigator_resources(netcp
);
1653 /* Close the device */
1654 static int netcp_ndo_stop(struct net_device
*ndev
)
1656 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1657 struct netcp_intf_modpriv
*intf_modpriv
;
1658 struct netcp_module
*module
;
1661 netif_tx_stop_all_queues(ndev
);
1662 netif_carrier_off(ndev
);
1663 netcp_addr_clear_mark(netcp
);
1664 netcp_addr_sweep_del(netcp
);
1665 knav_queue_disable_notify(netcp
->rx_queue
);
1666 knav_queue_disable_notify(netcp
->tx_compl_q
);
1667 napi_disable(&netcp
->rx_napi
);
1668 napi_disable(&netcp
->tx_napi
);
1670 mutex_lock(&netcp_modules_lock
);
1671 for_each_module(netcp
, intf_modpriv
) {
1672 module
= intf_modpriv
->netcp_module
;
1673 if (module
->close
) {
1674 err
= module
->close(intf_modpriv
->module_priv
, ndev
);
1676 dev_err(netcp
->ndev_dev
, "Close failed\n");
1679 mutex_unlock(&netcp_modules_lock
);
1681 /* Recycle Rx descriptors from completion queue */
1682 netcp_empty_rx_queue(netcp
);
1684 /* Recycle Tx descriptors from completion queue */
1685 netcp_process_tx_compl_packets(netcp
, netcp
->tx_pool_size
);
1687 if (knav_pool_count(netcp
->tx_pool
) != netcp
->tx_pool_size
)
1688 dev_err(netcp
->ndev_dev
, "Lost (%d) Tx descs\n",
1689 netcp
->tx_pool_size
- knav_pool_count(netcp
->tx_pool
));
1691 netcp_free_navigator_resources(netcp
);
1692 dev_dbg(netcp
->ndev_dev
, "netcp device %s stopped\n", ndev
->name
);
1696 static int netcp_ndo_ioctl(struct net_device
*ndev
,
1697 struct ifreq
*req
, int cmd
)
1699 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1700 struct netcp_intf_modpriv
*intf_modpriv
;
1701 struct netcp_module
*module
;
1702 int ret
= -1, err
= -EOPNOTSUPP
;
1704 if (!netif_running(ndev
))
1707 mutex_lock(&netcp_modules_lock
);
1708 for_each_module(netcp
, intf_modpriv
) {
1709 module
= intf_modpriv
->netcp_module
;
1713 err
= module
->ioctl(intf_modpriv
->module_priv
, req
, cmd
);
1714 if ((err
< 0) && (err
!= -EOPNOTSUPP
)) {
1723 mutex_unlock(&netcp_modules_lock
);
1724 return (ret
== 0) ? 0 : err
;
1727 static int netcp_ndo_change_mtu(struct net_device
*ndev
, int new_mtu
)
1729 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1731 /* MTU < 68 is an error for IPv4 traffic */
1732 if ((new_mtu
< 68) ||
1733 (new_mtu
> (NETCP_MAX_FRAME_SIZE
- ETH_HLEN
- ETH_FCS_LEN
))) {
1734 dev_err(netcp
->ndev_dev
, "Invalid mtu size = %d\n", new_mtu
);
1738 ndev
->mtu
= new_mtu
;
1742 static void netcp_ndo_tx_timeout(struct net_device
*ndev
)
1744 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1745 unsigned int descs
= knav_pool_count(netcp
->tx_pool
);
1747 dev_err(netcp
->ndev_dev
, "transmit timed out tx descs(%d)\n", descs
);
1748 netcp_process_tx_compl_packets(netcp
, netcp
->tx_pool_size
);
1749 ndev
->trans_start
= jiffies
;
1750 netif_tx_wake_all_queues(ndev
);
1753 static int netcp_rx_add_vid(struct net_device
*ndev
, __be16 proto
, u16 vid
)
1755 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1756 struct netcp_intf_modpriv
*intf_modpriv
;
1757 struct netcp_module
*module
;
1760 dev_dbg(netcp
->ndev_dev
, "adding rx vlan id: %d\n", vid
);
1762 mutex_lock(&netcp_modules_lock
);
1763 for_each_module(netcp
, intf_modpriv
) {
1764 module
= intf_modpriv
->netcp_module
;
1765 if ((module
->add_vid
) && (vid
!= 0)) {
1766 err
= module
->add_vid(intf_modpriv
->module_priv
, vid
);
1768 dev_err(netcp
->ndev_dev
, "Could not add vlan id = %d\n",
1774 mutex_unlock(&netcp_modules_lock
);
1778 static int netcp_rx_kill_vid(struct net_device
*ndev
, __be16 proto
, u16 vid
)
1780 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1781 struct netcp_intf_modpriv
*intf_modpriv
;
1782 struct netcp_module
*module
;
1785 dev_dbg(netcp
->ndev_dev
, "removing rx vlan id: %d\n", vid
);
1787 mutex_lock(&netcp_modules_lock
);
1788 for_each_module(netcp
, intf_modpriv
) {
1789 module
= intf_modpriv
->netcp_module
;
1790 if (module
->del_vid
) {
1791 err
= module
->del_vid(intf_modpriv
->module_priv
, vid
);
1793 dev_err(netcp
->ndev_dev
, "Could not delete vlan id = %d\n",
1799 mutex_unlock(&netcp_modules_lock
);
1803 static u16
netcp_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
1805 select_queue_fallback_t fallback
)
1810 static int netcp_setup_tc(struct net_device
*dev
, u8 num_tc
)
1814 /* setup tc must be called under rtnl lock */
1817 /* Sanity-check the number of traffic classes requested */
1818 if ((dev
->real_num_tx_queues
<= 1) ||
1819 (dev
->real_num_tx_queues
< num_tc
))
1822 /* Configure traffic class to queue mappings */
1824 netdev_set_num_tc(dev
, num_tc
);
1825 for (i
= 0; i
< num_tc
; i
++)
1826 netdev_set_tc_queue(dev
, i
, 1, i
);
1828 netdev_reset_tc(dev
);
1834 static const struct net_device_ops netcp_netdev_ops
= {
1835 .ndo_open
= netcp_ndo_open
,
1836 .ndo_stop
= netcp_ndo_stop
,
1837 .ndo_start_xmit
= netcp_ndo_start_xmit
,
1838 .ndo_set_rx_mode
= netcp_set_rx_mode
,
1839 .ndo_do_ioctl
= netcp_ndo_ioctl
,
1840 .ndo_change_mtu
= netcp_ndo_change_mtu
,
1841 .ndo_set_mac_address
= eth_mac_addr
,
1842 .ndo_validate_addr
= eth_validate_addr
,
1843 .ndo_vlan_rx_add_vid
= netcp_rx_add_vid
,
1844 .ndo_vlan_rx_kill_vid
= netcp_rx_kill_vid
,
1845 .ndo_tx_timeout
= netcp_ndo_tx_timeout
,
1846 .ndo_select_queue
= netcp_select_queue
,
1847 .ndo_setup_tc
= netcp_setup_tc
,
1850 static int netcp_create_interface(struct netcp_device
*netcp_device
,
1851 struct device_node
*node_interface
)
1853 struct device
*dev
= netcp_device
->device
;
1854 struct device_node
*node
= dev
->of_node
;
1855 struct netcp_intf
*netcp
;
1856 struct net_device
*ndev
;
1857 resource_size_t size
;
1858 struct resource res
;
1859 void __iomem
*efuse
= NULL
;
1861 const void *mac_addr
;
1862 u8 efuse_mac_addr
[6];
1866 ndev
= alloc_etherdev_mqs(sizeof(*netcp
), 1, 1);
1868 dev_err(dev
, "Error allocating netdev\n");
1872 ndev
->features
|= NETIF_F_SG
;
1873 ndev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
1874 ndev
->hw_features
= ndev
->features
;
1875 ndev
->vlan_features
|= NETIF_F_SG
;
1877 netcp
= netdev_priv(ndev
);
1878 spin_lock_init(&netcp
->lock
);
1879 INIT_LIST_HEAD(&netcp
->module_head
);
1880 INIT_LIST_HEAD(&netcp
->txhook_list_head
);
1881 INIT_LIST_HEAD(&netcp
->rxhook_list_head
);
1882 INIT_LIST_HEAD(&netcp
->addr_list
);
1883 netcp
->netcp_device
= netcp_device
;
1884 netcp
->dev
= netcp_device
->device
;
1886 netcp
->ndev_dev
= &ndev
->dev
;
1887 netcp
->msg_enable
= netif_msg_init(netcp_debug_level
, NETCP_DEBUG
);
1888 netcp
->tx_pause_threshold
= MAX_SKB_FRAGS
;
1889 netcp
->tx_resume_threshold
= netcp
->tx_pause_threshold
;
1890 netcp
->node_interface
= node_interface
;
1892 ret
= of_property_read_u32(node_interface
, "efuse-mac", &efuse_mac
);
1894 if (of_address_to_resource(node
, NETCP_EFUSE_REG_INDEX
, &res
)) {
1895 dev_err(dev
, "could not find efuse-mac reg resource\n");
1899 size
= resource_size(&res
);
1901 if (!devm_request_mem_region(dev
, res
.start
, size
,
1903 dev_err(dev
, "could not reserve resource\n");
1908 efuse
= devm_ioremap_nocache(dev
, res
.start
, size
);
1910 dev_err(dev
, "could not map resource\n");
1911 devm_release_mem_region(dev
, res
.start
, size
);
1916 emac_arch_get_mac_addr(efuse_mac_addr
, efuse
, efuse_mac
);
1917 if (is_valid_ether_addr(efuse_mac_addr
))
1918 ether_addr_copy(ndev
->dev_addr
, efuse_mac_addr
);
1920 random_ether_addr(ndev
->dev_addr
);
1922 devm_iounmap(dev
, efuse
);
1923 devm_release_mem_region(dev
, res
.start
, size
);
1925 mac_addr
= of_get_mac_address(node_interface
);
1927 ether_addr_copy(ndev
->dev_addr
, mac_addr
);
1929 random_ether_addr(ndev
->dev_addr
);
1932 ret
= of_property_read_string(node_interface
, "rx-channel",
1933 &netcp
->dma_chan_name
);
1935 dev_err(dev
, "missing \"rx-channel\" parameter\n");
1940 ret
= of_property_read_u32(node_interface
, "rx-queue",
1941 &netcp
->rx_queue_id
);
1943 dev_warn(dev
, "missing \"rx-queue\" parameter\n");
1944 netcp
->rx_queue_id
= KNAV_QUEUE_QPEND
;
1947 ret
= of_property_read_u32_array(node_interface
, "rx-queue-depth",
1948 netcp
->rx_queue_depths
,
1949 KNAV_DMA_FDQ_PER_CHAN
);
1951 dev_err(dev
, "missing \"rx-queue-depth\" parameter\n");
1952 netcp
->rx_queue_depths
[0] = 128;
1955 ret
= of_property_read_u32_array(node_interface
, "rx-buffer-size",
1956 netcp
->rx_buffer_sizes
,
1957 KNAV_DMA_FDQ_PER_CHAN
);
1959 dev_err(dev
, "missing \"rx-buffer-size\" parameter\n");
1960 netcp
->rx_buffer_sizes
[0] = 1536;
1963 ret
= of_property_read_u32_array(node_interface
, "rx-pool", temp
, 2);
1965 dev_err(dev
, "missing \"rx-pool\" parameter\n");
1969 netcp
->rx_pool_size
= temp
[0];
1970 netcp
->rx_pool_region_id
= temp
[1];
1972 ret
= of_property_read_u32_array(node_interface
, "tx-pool", temp
, 2);
1974 dev_err(dev
, "missing \"tx-pool\" parameter\n");
1978 netcp
->tx_pool_size
= temp
[0];
1979 netcp
->tx_pool_region_id
= temp
[1];
1981 if (netcp
->tx_pool_size
< MAX_SKB_FRAGS
) {
1982 dev_err(dev
, "tx-pool size too small, must be atleast(%ld)\n",
1988 ret
= of_property_read_u32(node_interface
, "tx-completion-queue",
1989 &netcp
->tx_compl_qid
);
1991 dev_warn(dev
, "missing \"tx-completion-queue\" parameter\n");
1992 netcp
->tx_compl_qid
= KNAV_QUEUE_QPEND
;
1996 netif_napi_add(ndev
, &netcp
->rx_napi
, netcp_rx_poll
, NETCP_NAPI_WEIGHT
);
1997 netif_napi_add(ndev
, &netcp
->tx_napi
, netcp_tx_poll
, NETCP_NAPI_WEIGHT
);
1999 /* Register the network device */
2001 ndev
->watchdog_timeo
= NETCP_TX_TIMEOUT
;
2002 ndev
->netdev_ops
= &netcp_netdev_ops
;
2003 SET_NETDEV_DEV(ndev
, dev
);
2005 list_add_tail(&netcp
->interface_list
, &netcp_device
->interface_head
);
2013 static void netcp_delete_interface(struct netcp_device
*netcp_device
,
2014 struct net_device
*ndev
)
2016 struct netcp_intf_modpriv
*intf_modpriv
, *tmp
;
2017 struct netcp_intf
*netcp
= netdev_priv(ndev
);
2018 struct netcp_module
*module
;
2020 dev_dbg(netcp_device
->device
, "Removing interface \"%s\"\n",
2023 /* Notify each of the modules that the interface is going away */
2024 list_for_each_entry_safe(intf_modpriv
, tmp
, &netcp
->module_head
,
2026 module
= intf_modpriv
->netcp_module
;
2027 dev_dbg(netcp_device
->device
, "Releasing module \"%s\"\n",
2029 if (module
->release
)
2030 module
->release(intf_modpriv
->module_priv
);
2031 list_del(&intf_modpriv
->intf_list
);
2032 kfree(intf_modpriv
);
2034 WARN(!list_empty(&netcp
->module_head
), "%s interface module list is not empty!\n",
2037 list_del(&netcp
->interface_list
);
2039 of_node_put(netcp
->node_interface
);
2040 unregister_netdev(ndev
);
2041 netif_napi_del(&netcp
->rx_napi
);
2045 static int netcp_probe(struct platform_device
*pdev
)
2047 struct device_node
*node
= pdev
->dev
.of_node
;
2048 struct netcp_intf
*netcp_intf
, *netcp_tmp
;
2049 struct device_node
*child
, *interfaces
;
2050 struct netcp_device
*netcp_device
;
2051 struct device
*dev
= &pdev
->dev
;
2052 struct netcp_module
*module
;
2056 dev_err(dev
, "could not find device info\n");
2060 /* Allocate a new NETCP device instance */
2061 netcp_device
= devm_kzalloc(dev
, sizeof(*netcp_device
), GFP_KERNEL
);
2065 pm_runtime_enable(&pdev
->dev
);
2066 ret
= pm_runtime_get_sync(&pdev
->dev
);
2068 dev_err(dev
, "Failed to enable NETCP power-domain\n");
2069 pm_runtime_disable(&pdev
->dev
);
2073 /* Initialize the NETCP device instance */
2074 INIT_LIST_HEAD(&netcp_device
->interface_head
);
2075 INIT_LIST_HEAD(&netcp_device
->modpriv_head
);
2076 netcp_device
->device
= dev
;
2077 platform_set_drvdata(pdev
, netcp_device
);
2079 /* create interfaces */
2080 interfaces
= of_get_child_by_name(node
, "netcp-interfaces");
2082 dev_err(dev
, "could not find netcp-interfaces node\n");
2087 for_each_available_child_of_node(interfaces
, child
) {
2088 ret
= netcp_create_interface(netcp_device
, child
);
2090 dev_err(dev
, "could not create interface(%s)\n",
2092 goto probe_quit_interface
;
2096 /* Add the device instance to the list */
2097 list_add_tail(&netcp_device
->device_list
, &netcp_devices
);
2099 /* Probe & attach any modules already registered */
2100 mutex_lock(&netcp_modules_lock
);
2101 for_each_netcp_module(module
) {
2102 ret
= netcp_module_probe(netcp_device
, module
);
2104 dev_err(dev
, "module(%s) probe failed\n", module
->name
);
2106 mutex_unlock(&netcp_modules_lock
);
2109 probe_quit_interface
:
2110 list_for_each_entry_safe(netcp_intf
, netcp_tmp
,
2111 &netcp_device
->interface_head
,
2113 netcp_delete_interface(netcp_device
, netcp_intf
->ndev
);
2117 pm_runtime_put_sync(&pdev
->dev
);
2118 pm_runtime_disable(&pdev
->dev
);
2119 platform_set_drvdata(pdev
, NULL
);
2123 static int netcp_remove(struct platform_device
*pdev
)
2125 struct netcp_device
*netcp_device
= platform_get_drvdata(pdev
);
2126 struct netcp_inst_modpriv
*inst_modpriv
, *tmp
;
2127 struct netcp_module
*module
;
2129 list_for_each_entry_safe(inst_modpriv
, tmp
, &netcp_device
->modpriv_head
,
2131 module
= inst_modpriv
->netcp_module
;
2132 dev_dbg(&pdev
->dev
, "Removing module \"%s\"\n", module
->name
);
2133 module
->remove(netcp_device
, inst_modpriv
->module_priv
);
2134 list_del(&inst_modpriv
->inst_list
);
2135 kfree(inst_modpriv
);
2137 WARN(!list_empty(&netcp_device
->interface_head
), "%s interface list not empty!\n",
2140 devm_kfree(&pdev
->dev
, netcp_device
);
2141 pm_runtime_put_sync(&pdev
->dev
);
2142 pm_runtime_disable(&pdev
->dev
);
2143 platform_set_drvdata(pdev
, NULL
);
2147 static const struct of_device_id of_match
[] = {
2148 { .compatible
= "ti,netcp-1.0", },
2151 MODULE_DEVICE_TABLE(of
, of_match
);
2153 static struct platform_driver netcp_driver
= {
2155 .name
= "netcp-1.0",
2156 .of_match_table
= of_match
,
2158 .probe
= netcp_probe
,
2159 .remove
= netcp_remove
,
2161 module_platform_driver(netcp_driver
);
2163 MODULE_LICENSE("GPL v2");
2164 MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs");
2165 MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com");