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_PACKET_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN)
38 #define NETCP_MIN_PACKET_SIZE ETH_ZLEN
39 #define NETCP_MAX_MCAST_ADDR 16
41 #define NETCP_EFUSE_REG_INDEX 0
43 #define NETCP_MOD_PROBE_SKIPPED 1
44 #define NETCP_MOD_PROBE_FAILED 2
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 | \
55 #define knav_queue_get_id(q) knav_queue_device_control(q, \
56 KNAV_QUEUE_GET_ID, (unsigned long)NULL)
58 #define knav_queue_enable_notify(q) knav_queue_device_control(q, \
59 KNAV_QUEUE_ENABLE_NOTIFY, \
62 #define knav_queue_disable_notify(q) knav_queue_device_control(q, \
63 KNAV_QUEUE_DISABLE_NOTIFY, \
66 #define knav_queue_get_count(q) knav_queue_device_control(q, \
67 KNAV_QUEUE_GET_COUNT, (unsigned long)NULL)
69 #define for_each_netcp_module(module) \
70 list_for_each_entry(module, &netcp_modules, module_list)
72 #define for_each_netcp_device_module(netcp_device, inst_modpriv) \
73 list_for_each_entry(inst_modpriv, \
74 &((netcp_device)->modpriv_head), inst_list)
76 #define for_each_module(netcp, intf_modpriv) \
77 list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list)
79 /* Module management structures */
81 struct list_head device_list
;
82 struct list_head interface_head
;
83 struct list_head modpriv_head
;
84 struct device
*device
;
87 struct netcp_inst_modpriv
{
88 struct netcp_device
*netcp_device
;
89 struct netcp_module
*netcp_module
;
90 struct list_head inst_list
;
94 struct netcp_intf_modpriv
{
95 struct netcp_intf
*netcp_priv
;
96 struct netcp_module
*netcp_module
;
97 struct list_head intf_list
;
101 static LIST_HEAD(netcp_devices
);
102 static LIST_HEAD(netcp_modules
);
103 static DEFINE_MUTEX(netcp_modules_lock
);
105 static int netcp_debug_level
= -1;
106 module_param(netcp_debug_level
, int, 0);
107 MODULE_PARM_DESC(netcp_debug_level
, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");
109 /* Helper functions - Get/Set */
110 static void get_pkt_info(u32
*buff
, u32
*buff_len
, u32
*ndesc
,
111 struct knav_dma_desc
*desc
)
113 *buff_len
= desc
->buff_len
;
115 *ndesc
= desc
->next_desc
;
118 static void get_pad_info(u32
*pad0
, u32
*pad1
, struct knav_dma_desc
*desc
)
120 *pad0
= desc
->pad
[0];
121 *pad1
= desc
->pad
[1];
124 static void get_org_pkt_info(u32
*buff
, u32
*buff_len
,
125 struct knav_dma_desc
*desc
)
127 *buff
= desc
->orig_buff
;
128 *buff_len
= desc
->orig_len
;
131 static void get_words(u32
*words
, int num_words
, u32
*desc
)
135 for (i
= 0; i
< num_words
; i
++)
139 static void set_pkt_info(u32 buff
, u32 buff_len
, u32 ndesc
,
140 struct knav_dma_desc
*desc
)
142 desc
->buff_len
= buff_len
;
144 desc
->next_desc
= ndesc
;
147 static void set_desc_info(u32 desc_info
, u32 pkt_info
,
148 struct knav_dma_desc
*desc
)
150 desc
->desc_info
= desc_info
;
151 desc
->packet_info
= pkt_info
;
154 static void set_pad_info(u32 pad0
, u32 pad1
, struct knav_dma_desc
*desc
)
160 static void set_org_pkt_info(u32 buff
, u32 buff_len
,
161 struct knav_dma_desc
*desc
)
163 desc
->orig_buff
= buff
;
164 desc
->orig_len
= buff_len
;
167 static void set_words(u32
*words
, int num_words
, u32
*desc
)
171 for (i
= 0; i
< num_words
; i
++)
175 /* Read the e-fuse value as 32 bit values to be endian independent */
176 static int emac_arch_get_mac_addr(char *x
, void __iomem
*efuse_mac
)
178 unsigned int addr0
, addr1
;
180 addr1
= readl(efuse_mac
+ 4);
181 addr0
= readl(efuse_mac
);
183 x
[0] = (addr1
& 0x0000ff00) >> 8;
184 x
[1] = addr1
& 0x000000ff;
185 x
[2] = (addr0
& 0xff000000) >> 24;
186 x
[3] = (addr0
& 0x00ff0000) >> 16;
187 x
[4] = (addr0
& 0x0000ff00) >> 8;
188 x
[5] = addr0
& 0x000000ff;
193 static const char *netcp_node_name(struct device_node
*node
)
197 if (of_property_read_string(node
, "label", &name
) < 0)
204 /* Module management routines */
205 static int netcp_register_interface(struct netcp_intf
*netcp
)
209 ret
= register_netdev(netcp
->ndev
);
211 netcp
->netdev_registered
= true;
215 static int netcp_module_probe(struct netcp_device
*netcp_device
,
216 struct netcp_module
*module
)
218 struct device
*dev
= netcp_device
->device
;
219 struct device_node
*devices
, *interface
, *node
= dev
->of_node
;
220 struct device_node
*child
;
221 struct netcp_inst_modpriv
*inst_modpriv
;
222 struct netcp_intf
*netcp_intf
;
223 struct netcp_module
*tmp
;
224 bool primary_module_registered
= false;
227 /* Find this module in the sub-tree for this device */
228 devices
= of_get_child_by_name(node
, "netcp-devices");
230 dev_err(dev
, "could not find netcp-devices node\n");
231 return NETCP_MOD_PROBE_SKIPPED
;
234 for_each_available_child_of_node(devices
, child
) {
235 const char *name
= netcp_node_name(child
);
237 if (!strcasecmp(module
->name
, name
))
241 of_node_put(devices
);
242 /* If module not used for this device, skip it */
244 dev_warn(dev
, "module(%s) not used for device\n", module
->name
);
245 return NETCP_MOD_PROBE_SKIPPED
;
248 inst_modpriv
= devm_kzalloc(dev
, sizeof(*inst_modpriv
), GFP_KERNEL
);
254 inst_modpriv
->netcp_device
= netcp_device
;
255 inst_modpriv
->netcp_module
= module
;
256 list_add_tail(&inst_modpriv
->inst_list
, &netcp_device
->modpriv_head
);
258 ret
= module
->probe(netcp_device
, dev
, child
,
259 &inst_modpriv
->module_priv
);
262 dev_err(dev
, "Probe of module(%s) failed with %d\n",
264 list_del(&inst_modpriv
->inst_list
);
265 devm_kfree(dev
, inst_modpriv
);
266 return NETCP_MOD_PROBE_FAILED
;
269 /* Attach modules only if the primary module is probed */
270 for_each_netcp_module(tmp
) {
272 primary_module_registered
= true;
275 if (!primary_module_registered
)
278 /* Attach module to interfaces */
279 list_for_each_entry(netcp_intf
, &netcp_device
->interface_head
,
281 struct netcp_intf_modpriv
*intf_modpriv
;
283 /* If interface not registered then register now */
284 if (!netcp_intf
->netdev_registered
)
285 ret
= netcp_register_interface(netcp_intf
);
290 intf_modpriv
= devm_kzalloc(dev
, sizeof(*intf_modpriv
),
295 interface
= of_parse_phandle(netcp_intf
->node_interface
,
298 intf_modpriv
->netcp_priv
= netcp_intf
;
299 intf_modpriv
->netcp_module
= module
;
300 list_add_tail(&intf_modpriv
->intf_list
,
301 &netcp_intf
->module_head
);
303 ret
= module
->attach(inst_modpriv
->module_priv
,
304 netcp_intf
->ndev
, interface
,
305 &intf_modpriv
->module_priv
);
306 of_node_put(interface
);
308 dev_dbg(dev
, "Attach of module %s declined with %d\n",
310 list_del(&intf_modpriv
->intf_list
);
311 devm_kfree(dev
, intf_modpriv
);
318 int netcp_register_module(struct netcp_module
*module
)
320 struct netcp_device
*netcp_device
;
321 struct netcp_module
*tmp
;
325 WARN(1, "error registering netcp module: no name\n");
329 if (!module
->probe
) {
330 WARN(1, "error registering netcp module: no probe\n");
334 mutex_lock(&netcp_modules_lock
);
336 for_each_netcp_module(tmp
) {
337 if (!strcasecmp(tmp
->name
, module
->name
)) {
338 mutex_unlock(&netcp_modules_lock
);
342 list_add_tail(&module
->module_list
, &netcp_modules
);
344 list_for_each_entry(netcp_device
, &netcp_devices
, device_list
) {
345 ret
= netcp_module_probe(netcp_device
, module
);
350 mutex_unlock(&netcp_modules_lock
);
354 mutex_unlock(&netcp_modules_lock
);
355 netcp_unregister_module(module
);
358 EXPORT_SYMBOL_GPL(netcp_register_module
);
360 static void netcp_release_module(struct netcp_device
*netcp_device
,
361 struct netcp_module
*module
)
363 struct netcp_inst_modpriv
*inst_modpriv
, *inst_tmp
;
364 struct netcp_intf
*netcp_intf
, *netcp_tmp
;
365 struct device
*dev
= netcp_device
->device
;
367 /* Release the module from each interface */
368 list_for_each_entry_safe(netcp_intf
, netcp_tmp
,
369 &netcp_device
->interface_head
,
371 struct netcp_intf_modpriv
*intf_modpriv
, *intf_tmp
;
373 list_for_each_entry_safe(intf_modpriv
, intf_tmp
,
374 &netcp_intf
->module_head
,
376 if (intf_modpriv
->netcp_module
== module
) {
377 module
->release(intf_modpriv
->module_priv
);
378 list_del(&intf_modpriv
->intf_list
);
379 devm_kfree(dev
, intf_modpriv
);
385 /* Remove the module from each instance */
386 list_for_each_entry_safe(inst_modpriv
, inst_tmp
,
387 &netcp_device
->modpriv_head
, inst_list
) {
388 if (inst_modpriv
->netcp_module
== module
) {
389 module
->remove(netcp_device
,
390 inst_modpriv
->module_priv
);
391 list_del(&inst_modpriv
->inst_list
);
392 devm_kfree(dev
, inst_modpriv
);
398 void netcp_unregister_module(struct netcp_module
*module
)
400 struct netcp_device
*netcp_device
;
401 struct netcp_module
*module_tmp
;
403 mutex_lock(&netcp_modules_lock
);
405 list_for_each_entry(netcp_device
, &netcp_devices
, device_list
) {
406 netcp_release_module(netcp_device
, module
);
409 /* Remove the module from the module list */
410 for_each_netcp_module(module_tmp
) {
411 if (module
== module_tmp
) {
412 list_del(&module
->module_list
);
417 mutex_unlock(&netcp_modules_lock
);
419 EXPORT_SYMBOL_GPL(netcp_unregister_module
);
421 void *netcp_module_get_intf_data(struct netcp_module
*module
,
422 struct netcp_intf
*intf
)
424 struct netcp_intf_modpriv
*intf_modpriv
;
426 list_for_each_entry(intf_modpriv
, &intf
->module_head
, intf_list
)
427 if (intf_modpriv
->netcp_module
== module
)
428 return intf_modpriv
->module_priv
;
431 EXPORT_SYMBOL_GPL(netcp_module_get_intf_data
);
433 /* Module TX and RX Hook management */
434 struct netcp_hook_list
{
435 struct list_head list
;
436 netcp_hook_rtn
*hook_rtn
;
441 int netcp_register_txhook(struct netcp_intf
*netcp_priv
, int order
,
442 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
444 struct netcp_hook_list
*entry
;
445 struct netcp_hook_list
*next
;
448 entry
= devm_kzalloc(netcp_priv
->dev
, sizeof(*entry
), GFP_KERNEL
);
452 entry
->hook_rtn
= hook_rtn
;
453 entry
->hook_data
= hook_data
;
454 entry
->order
= order
;
456 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
457 list_for_each_entry(next
, &netcp_priv
->txhook_list_head
, list
) {
458 if (next
->order
> order
)
461 __list_add(&entry
->list
, next
->list
.prev
, &next
->list
);
462 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
466 EXPORT_SYMBOL_GPL(netcp_register_txhook
);
468 int netcp_unregister_txhook(struct netcp_intf
*netcp_priv
, int order
,
469 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
471 struct netcp_hook_list
*next
, *n
;
474 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
475 list_for_each_entry_safe(next
, n
, &netcp_priv
->txhook_list_head
, list
) {
476 if ((next
->order
== order
) &&
477 (next
->hook_rtn
== hook_rtn
) &&
478 (next
->hook_data
== hook_data
)) {
479 list_del(&next
->list
);
480 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
481 devm_kfree(netcp_priv
->dev
, next
);
485 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
488 EXPORT_SYMBOL_GPL(netcp_unregister_txhook
);
490 int netcp_register_rxhook(struct netcp_intf
*netcp_priv
, int order
,
491 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
493 struct netcp_hook_list
*entry
;
494 struct netcp_hook_list
*next
;
497 entry
= devm_kzalloc(netcp_priv
->dev
, sizeof(*entry
), GFP_KERNEL
);
501 entry
->hook_rtn
= hook_rtn
;
502 entry
->hook_data
= hook_data
;
503 entry
->order
= order
;
505 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
506 list_for_each_entry(next
, &netcp_priv
->rxhook_list_head
, list
) {
507 if (next
->order
> order
)
510 __list_add(&entry
->list
, next
->list
.prev
, &next
->list
);
511 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
516 int netcp_unregister_rxhook(struct netcp_intf
*netcp_priv
, int order
,
517 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
519 struct netcp_hook_list
*next
, *n
;
522 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
523 list_for_each_entry_safe(next
, n
, &netcp_priv
->rxhook_list_head
, list
) {
524 if ((next
->order
== order
) &&
525 (next
->hook_rtn
== hook_rtn
) &&
526 (next
->hook_data
== hook_data
)) {
527 list_del(&next
->list
);
528 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
529 devm_kfree(netcp_priv
->dev
, next
);
533 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
538 static void netcp_frag_free(bool is_frag
, void *ptr
)
546 static void netcp_free_rx_desc_chain(struct netcp_intf
*netcp
,
547 struct knav_dma_desc
*desc
)
549 struct knav_dma_desc
*ndesc
;
550 dma_addr_t dma_desc
, dma_buf
;
551 unsigned int buf_len
, dma_sz
= sizeof(*ndesc
);
555 get_words(&dma_desc
, 1, &desc
->next_desc
);
558 ndesc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma_desc
, dma_sz
);
559 if (unlikely(!ndesc
)) {
560 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
563 get_pkt_info(&dma_buf
, &tmp
, &dma_desc
, ndesc
);
564 get_pad_info((u32
*)&buf_ptr
, &tmp
, ndesc
);
565 dma_unmap_page(netcp
->dev
, dma_buf
, PAGE_SIZE
, DMA_FROM_DEVICE
);
566 __free_page(buf_ptr
);
567 knav_pool_desc_put(netcp
->rx_pool
, desc
);
570 get_pad_info((u32
*)&buf_ptr
, &buf_len
, desc
);
572 netcp_frag_free(buf_len
<= PAGE_SIZE
, buf_ptr
);
573 knav_pool_desc_put(netcp
->rx_pool
, desc
);
576 static void netcp_empty_rx_queue(struct netcp_intf
*netcp
)
578 struct knav_dma_desc
*desc
;
583 dma
= knav_queue_pop(netcp
->rx_queue
, &dma_sz
);
587 desc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma
, dma_sz
);
588 if (unlikely(!desc
)) {
589 dev_err(netcp
->ndev_dev
, "%s: failed to unmap Rx desc\n",
591 netcp
->ndev
->stats
.rx_errors
++;
594 netcp_free_rx_desc_chain(netcp
, desc
);
595 netcp
->ndev
->stats
.rx_dropped
++;
599 static int netcp_process_one_rx_packet(struct netcp_intf
*netcp
)
601 unsigned int dma_sz
, buf_len
, org_buf_len
;
602 struct knav_dma_desc
*desc
, *ndesc
;
603 unsigned int pkt_sz
= 0, accum_sz
;
604 struct netcp_hook_list
*rx_hook
;
605 dma_addr_t dma_desc
, dma_buff
;
606 struct netcp_packet p_info
;
611 dma_desc
= knav_queue_pop(netcp
->rx_queue
, &dma_sz
);
615 desc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma_desc
, dma_sz
);
616 if (unlikely(!desc
)) {
617 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
621 get_pkt_info(&dma_buff
, &buf_len
, &dma_desc
, desc
);
622 get_pad_info((u32
*)&org_buf_ptr
, &org_buf_len
, desc
);
624 if (unlikely(!org_buf_ptr
)) {
625 dev_err(netcp
->ndev_dev
, "NULL bufptr in desc\n");
629 pkt_sz
&= KNAV_DMA_DESC_PKT_LEN_MASK
;
631 dma_unmap_single(netcp
->dev
, dma_buff
, buf_len
, DMA_FROM_DEVICE
);
633 /* Build a new sk_buff for the primary buffer */
634 skb
= build_skb(org_buf_ptr
, org_buf_len
);
635 if (unlikely(!skb
)) {
636 dev_err(netcp
->ndev_dev
, "build_skb() failed\n");
640 /* update data, tail and len */
641 skb_reserve(skb
, NETCP_SOP_OFFSET
);
642 __skb_put(skb
, buf_len
);
644 /* Fill in the page fragment list */
648 ndesc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma_desc
, dma_sz
);
649 if (unlikely(!ndesc
)) {
650 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
654 get_pkt_info(&dma_buff
, &buf_len
, &dma_desc
, ndesc
);
655 get_pad_info((u32
*)&page
, &tmp
, ndesc
);
657 if (likely(dma_buff
&& buf_len
&& page
)) {
658 dma_unmap_page(netcp
->dev
, dma_buff
, PAGE_SIZE
,
661 dev_err(netcp
->ndev_dev
, "Bad Rx desc dma_buff(%p), len(%d), page(%p)\n",
662 (void *)dma_buff
, buf_len
, page
);
666 skb_add_rx_frag(skb
, skb_shinfo(skb
)->nr_frags
, page
,
667 offset_in_page(dma_buff
), buf_len
, PAGE_SIZE
);
670 /* Free the descriptor */
671 knav_pool_desc_put(netcp
->rx_pool
, ndesc
);
674 /* Free the primary descriptor */
675 knav_pool_desc_put(netcp
->rx_pool
, desc
);
677 /* check for packet len and warn */
678 if (unlikely(pkt_sz
!= accum_sz
))
679 dev_dbg(netcp
->ndev_dev
, "mismatch in packet size(%d) & sum of fragments(%d)\n",
682 /* Remove ethernet FCS from the packet */
683 __pskb_trim(skb
, skb
->len
- ETH_FCS_LEN
);
685 /* Call each of the RX hooks */
687 p_info
.rxtstamp_complete
= false;
688 list_for_each_entry(rx_hook
, &netcp
->rxhook_list_head
, list
) {
691 ret
= rx_hook
->hook_rtn(rx_hook
->order
, rx_hook
->hook_data
,
694 dev_err(netcp
->ndev_dev
, "RX hook %d failed: %d\n",
695 rx_hook
->order
, ret
);
696 netcp
->ndev
->stats
.rx_errors
++;
702 netcp
->ndev
->stats
.rx_packets
++;
703 netcp
->ndev
->stats
.rx_bytes
+= skb
->len
;
705 /* push skb up the stack */
706 skb
->protocol
= eth_type_trans(skb
, netcp
->ndev
);
707 netif_receive_skb(skb
);
711 netcp_free_rx_desc_chain(netcp
, desc
);
712 netcp
->ndev
->stats
.rx_errors
++;
716 static int netcp_process_rx_packets(struct netcp_intf
*netcp
,
721 for (i
= 0; (i
< budget
) && !netcp_process_one_rx_packet(netcp
); i
++)
726 /* Release descriptors and attached buffers from Rx FDQ */
727 static void netcp_free_rx_buf(struct netcp_intf
*netcp
, int fdq
)
729 struct knav_dma_desc
*desc
;
730 unsigned int buf_len
, dma_sz
;
735 /* Allocate descriptor */
736 while ((dma
= knav_queue_pop(netcp
->rx_fdq
[fdq
], &dma_sz
))) {
737 desc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma
, dma_sz
);
738 if (unlikely(!desc
)) {
739 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
743 get_org_pkt_info(&dma
, &buf_len
, desc
);
744 get_pad_info((u32
*)&buf_ptr
, &tmp
, desc
);
746 if (unlikely(!dma
)) {
747 dev_err(netcp
->ndev_dev
, "NULL orig_buff in desc\n");
748 knav_pool_desc_put(netcp
->rx_pool
, desc
);
752 if (unlikely(!buf_ptr
)) {
753 dev_err(netcp
->ndev_dev
, "NULL bufptr in desc\n");
754 knav_pool_desc_put(netcp
->rx_pool
, desc
);
759 dma_unmap_single(netcp
->dev
, dma
, buf_len
,
761 netcp_frag_free((buf_len
<= PAGE_SIZE
), buf_ptr
);
763 dma_unmap_page(netcp
->dev
, dma
, buf_len
,
765 __free_page(buf_ptr
);
768 knav_pool_desc_put(netcp
->rx_pool
, desc
);
772 static void netcp_rxpool_free(struct netcp_intf
*netcp
)
776 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&&
777 !IS_ERR_OR_NULL(netcp
->rx_fdq
[i
]); i
++)
778 netcp_free_rx_buf(netcp
, i
);
780 if (knav_pool_count(netcp
->rx_pool
) != netcp
->rx_pool_size
)
781 dev_err(netcp
->ndev_dev
, "Lost Rx (%d) descriptors\n",
782 netcp
->rx_pool_size
- knav_pool_count(netcp
->rx_pool
));
784 knav_pool_destroy(netcp
->rx_pool
);
785 netcp
->rx_pool
= NULL
;
788 static void netcp_allocate_rx_buf(struct netcp_intf
*netcp
, int fdq
)
790 struct knav_dma_desc
*hwdesc
;
791 unsigned int buf_len
, dma_sz
;
792 u32 desc_info
, pkt_info
;
798 /* Allocate descriptor */
799 hwdesc
= knav_pool_desc_get(netcp
->rx_pool
);
800 if (IS_ERR_OR_NULL(hwdesc
)) {
801 dev_dbg(netcp
->ndev_dev
, "out of rx pool desc\n");
805 if (likely(fdq
== 0)) {
806 unsigned int primary_buf_len
;
807 /* Allocate a primary receive queue entry */
808 buf_len
= NETCP_PACKET_SIZE
+ NETCP_SOP_OFFSET
;
809 primary_buf_len
= SKB_DATA_ALIGN(buf_len
) +
810 SKB_DATA_ALIGN(sizeof(struct skb_shared_info
));
812 bufptr
= netdev_alloc_frag(primary_buf_len
);
813 pad
[1] = primary_buf_len
;
815 if (unlikely(!bufptr
)) {
816 dev_warn_ratelimited(netcp
->ndev_dev
,
817 "Primary RX buffer alloc failed\n");
820 dma
= dma_map_single(netcp
->dev
, bufptr
, buf_len
,
822 if (unlikely(dma_mapping_error(netcp
->dev
, dma
)))
825 pad
[0] = (u32
)bufptr
;
828 /* Allocate a secondary receive queue entry */
829 page
= alloc_page(GFP_ATOMIC
| GFP_DMA
| __GFP_COLD
);
830 if (unlikely(!page
)) {
831 dev_warn_ratelimited(netcp
->ndev_dev
, "Secondary page alloc failed\n");
835 dma
= dma_map_page(netcp
->dev
, page
, 0, buf_len
, DMA_TO_DEVICE
);
840 desc_info
= KNAV_DMA_DESC_PS_INFO_IN_DESC
;
841 desc_info
|= buf_len
& KNAV_DMA_DESC_PKT_LEN_MASK
;
842 pkt_info
= KNAV_DMA_DESC_HAS_EPIB
;
843 pkt_info
|= KNAV_DMA_NUM_PS_WORDS
<< KNAV_DMA_DESC_PSLEN_SHIFT
;
844 pkt_info
|= (netcp
->rx_queue_id
& KNAV_DMA_DESC_RETQ_MASK
) <<
845 KNAV_DMA_DESC_RETQ_SHIFT
;
846 set_org_pkt_info(dma
, buf_len
, hwdesc
);
847 set_pad_info(pad
[0], pad
[1], hwdesc
);
848 set_desc_info(desc_info
, pkt_info
, hwdesc
);
851 knav_pool_desc_map(netcp
->rx_pool
, hwdesc
, sizeof(*hwdesc
), &dma
,
853 knav_queue_push(netcp
->rx_fdq
[fdq
], dma
, sizeof(*hwdesc
), 0);
857 knav_pool_desc_put(netcp
->rx_pool
, hwdesc
);
860 /* Refill Rx FDQ with descriptors & attached buffers */
861 static void netcp_rxpool_refill(struct netcp_intf
*netcp
)
863 u32 fdq_deficit
[KNAV_DMA_FDQ_PER_CHAN
] = {0};
866 /* Calculate the FDQ deficit and refill */
867 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&& netcp
->rx_fdq
[i
]; i
++) {
868 fdq_deficit
[i
] = netcp
->rx_queue_depths
[i
] -
869 knav_queue_get_count(netcp
->rx_fdq
[i
]);
871 while (fdq_deficit
[i
]--)
872 netcp_allocate_rx_buf(netcp
, i
);
877 static int netcp_rx_poll(struct napi_struct
*napi
, int budget
)
879 struct netcp_intf
*netcp
= container_of(napi
, struct netcp_intf
,
881 unsigned int packets
;
883 packets
= netcp_process_rx_packets(netcp
, budget
);
885 if (packets
< budget
) {
886 napi_complete(&netcp
->rx_napi
);
887 knav_queue_enable_notify(netcp
->rx_queue
);
890 netcp_rxpool_refill(netcp
);
894 static void netcp_rx_notify(void *arg
)
896 struct netcp_intf
*netcp
= arg
;
898 knav_queue_disable_notify(netcp
->rx_queue
);
899 napi_schedule(&netcp
->rx_napi
);
902 static void netcp_free_tx_desc_chain(struct netcp_intf
*netcp
,
903 struct knav_dma_desc
*desc
,
904 unsigned int desc_sz
)
906 struct knav_dma_desc
*ndesc
= desc
;
907 dma_addr_t dma_desc
, dma_buf
;
908 unsigned int buf_len
;
911 get_pkt_info(&dma_buf
, &buf_len
, &dma_desc
, ndesc
);
913 if (dma_buf
&& buf_len
)
914 dma_unmap_single(netcp
->dev
, dma_buf
, buf_len
,
917 dev_warn(netcp
->ndev_dev
, "bad Tx desc buf(%p), len(%d)\n",
918 (void *)dma_buf
, buf_len
);
920 knav_pool_desc_put(netcp
->tx_pool
, ndesc
);
923 ndesc
= knav_pool_desc_unmap(netcp
->tx_pool
, dma_desc
,
926 dev_err(netcp
->ndev_dev
, "failed to unmap Tx desc\n");
931 static int netcp_process_tx_compl_packets(struct netcp_intf
*netcp
,
934 struct knav_dma_desc
*desc
;
942 dma
= knav_queue_pop(netcp
->tx_compl_q
, &dma_sz
);
945 desc
= knav_pool_desc_unmap(netcp
->tx_pool
, dma
, dma_sz
);
946 if (unlikely(!desc
)) {
947 dev_err(netcp
->ndev_dev
, "failed to unmap Tx desc\n");
948 netcp
->ndev
->stats
.tx_errors
++;
952 get_pad_info((u32
*)&skb
, &tmp
, desc
);
953 netcp_free_tx_desc_chain(netcp
, desc
, dma_sz
);
955 dev_err(netcp
->ndev_dev
, "No skb in Tx desc\n");
956 netcp
->ndev
->stats
.tx_errors
++;
960 if (netif_subqueue_stopped(netcp
->ndev
, skb
) &&
961 netif_running(netcp
->ndev
) &&
962 (knav_pool_count(netcp
->tx_pool
) >
963 netcp
->tx_resume_threshold
)) {
964 u16 subqueue
= skb_get_queue_mapping(skb
);
966 netif_wake_subqueue(netcp
->ndev
, subqueue
);
969 netcp
->ndev
->stats
.tx_packets
++;
970 netcp
->ndev
->stats
.tx_bytes
+= skb
->len
;
977 static int netcp_tx_poll(struct napi_struct
*napi
, int budget
)
980 struct netcp_intf
*netcp
= container_of(napi
, struct netcp_intf
,
983 packets
= netcp_process_tx_compl_packets(netcp
, budget
);
984 if (packets
< budget
) {
985 napi_complete(&netcp
->tx_napi
);
986 knav_queue_enable_notify(netcp
->tx_compl_q
);
992 static void netcp_tx_notify(void *arg
)
994 struct netcp_intf
*netcp
= arg
;
996 knav_queue_disable_notify(netcp
->tx_compl_q
);
997 napi_schedule(&netcp
->tx_napi
);
1000 static struct knav_dma_desc
*
1001 netcp_tx_map_skb(struct sk_buff
*skb
, struct netcp_intf
*netcp
)
1003 struct knav_dma_desc
*desc
, *ndesc
, *pdesc
;
1004 unsigned int pkt_len
= skb_headlen(skb
);
1005 struct device
*dev
= netcp
->dev
;
1006 dma_addr_t dma_addr
;
1007 unsigned int dma_sz
;
1010 /* Map the linear buffer */
1011 dma_addr
= dma_map_single(dev
, skb
->data
, pkt_len
, DMA_TO_DEVICE
);
1012 if (unlikely(dma_mapping_error(dev
, dma_addr
))) {
1013 dev_err(netcp
->ndev_dev
, "Failed to map skb buffer\n");
1017 desc
= knav_pool_desc_get(netcp
->tx_pool
);
1018 if (unlikely(IS_ERR_OR_NULL(desc
))) {
1019 dev_err(netcp
->ndev_dev
, "out of TX desc\n");
1020 dma_unmap_single(dev
, dma_addr
, pkt_len
, DMA_TO_DEVICE
);
1024 set_pkt_info(dma_addr
, pkt_len
, 0, desc
);
1025 if (skb_is_nonlinear(skb
)) {
1026 prefetchw(skb_shinfo(skb
));
1028 desc
->next_desc
= 0;
1034 /* Handle the case where skb is fragmented in pages */
1035 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; i
++) {
1036 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
1037 struct page
*page
= skb_frag_page(frag
);
1038 u32 page_offset
= frag
->page_offset
;
1039 u32 buf_len
= skb_frag_size(frag
);
1040 dma_addr_t desc_dma
;
1043 dma_addr
= dma_map_page(dev
, page
, page_offset
, buf_len
,
1045 if (unlikely(!dma_addr
)) {
1046 dev_err(netcp
->ndev_dev
, "Failed to map skb page\n");
1050 ndesc
= knav_pool_desc_get(netcp
->tx_pool
);
1051 if (unlikely(IS_ERR_OR_NULL(ndesc
))) {
1052 dev_err(netcp
->ndev_dev
, "out of TX desc for frags\n");
1053 dma_unmap_page(dev
, dma_addr
, buf_len
, DMA_TO_DEVICE
);
1057 desc_dma
= knav_pool_desc_virt_to_dma(netcp
->tx_pool
,
1060 (netcp
->tx_compl_qid
& KNAV_DMA_DESC_RETQ_MASK
) <<
1061 KNAV_DMA_DESC_RETQ_SHIFT
;
1062 set_pkt_info(dma_addr
, buf_len
, 0, ndesc
);
1063 set_words(&desc_dma
, 1, &pdesc
->next_desc
);
1066 knav_pool_desc_map(netcp
->tx_pool
, pdesc
,
1067 sizeof(*pdesc
), &desc_dma
, &dma_sz
);
1071 knav_pool_desc_map(netcp
->tx_pool
, pdesc
, sizeof(*pdesc
),
1072 &dma_addr
, &dma_sz
);
1074 /* frag list based linkage is not supported for now. */
1075 if (skb_shinfo(skb
)->frag_list
) {
1076 dev_err_ratelimited(netcp
->ndev_dev
, "NETIF_F_FRAGLIST not supported\n");
1081 WARN_ON(pkt_len
!= skb
->len
);
1083 pkt_len
&= KNAV_DMA_DESC_PKT_LEN_MASK
;
1084 set_words(&pkt_len
, 1, &desc
->desc_info
);
1088 netcp_free_tx_desc_chain(netcp
, desc
, sizeof(*desc
));
1092 static int netcp_tx_submit_skb(struct netcp_intf
*netcp
,
1093 struct sk_buff
*skb
,
1094 struct knav_dma_desc
*desc
)
1096 struct netcp_tx_pipe
*tx_pipe
= NULL
;
1097 struct netcp_hook_list
*tx_hook
;
1098 struct netcp_packet p_info
;
1099 unsigned int dma_sz
;
1104 p_info
.netcp
= netcp
;
1106 p_info
.tx_pipe
= NULL
;
1107 p_info
.psdata_len
= 0;
1108 p_info
.ts_context
= NULL
;
1109 p_info
.txtstamp_complete
= NULL
;
1110 p_info
.epib
= desc
->epib
;
1111 p_info
.psdata
= desc
->psdata
;
1112 memset(p_info
.epib
, 0, KNAV_DMA_NUM_EPIB_WORDS
* sizeof(u32
));
1114 /* Find out where to inject the packet for transmission */
1115 list_for_each_entry(tx_hook
, &netcp
->txhook_list_head
, list
) {
1116 ret
= tx_hook
->hook_rtn(tx_hook
->order
, tx_hook
->hook_data
,
1118 if (unlikely(ret
!= 0)) {
1119 dev_err(netcp
->ndev_dev
, "TX hook %d rejected the packet with reason(%d)\n",
1120 tx_hook
->order
, ret
);
1121 ret
= (ret
< 0) ? ret
: NETDEV_TX_OK
;
1126 /* Make sure some TX hook claimed the packet */
1127 tx_pipe
= p_info
.tx_pipe
;
1129 dev_err(netcp
->ndev_dev
, "No TX hook claimed the packet!\n");
1134 /* update descriptor */
1135 if (p_info
.psdata_len
) {
1136 u32
*psdata
= p_info
.psdata
;
1138 memmove(p_info
.psdata
, p_info
.psdata
+ p_info
.psdata_len
,
1140 set_words(psdata
, p_info
.psdata_len
, psdata
);
1141 tmp
|= (p_info
.psdata_len
& KNAV_DMA_DESC_PSLEN_MASK
) <<
1142 KNAV_DMA_DESC_PSLEN_SHIFT
;
1145 tmp
|= KNAV_DMA_DESC_HAS_EPIB
|
1146 ((netcp
->tx_compl_qid
& KNAV_DMA_DESC_RETQ_MASK
) <<
1147 KNAV_DMA_DESC_RETQ_SHIFT
);
1149 if (!(tx_pipe
->flags
& SWITCH_TO_PORT_IN_TAGINFO
)) {
1150 tmp
|= ((tx_pipe
->switch_to_port
& KNAV_DMA_DESC_PSFLAG_MASK
) <<
1151 KNAV_DMA_DESC_PSFLAG_SHIFT
);
1154 set_words(&tmp
, 1, &desc
->packet_info
);
1155 set_words((u32
*)&skb
, 1, &desc
->pad
[0]);
1157 if (tx_pipe
->flags
& SWITCH_TO_PORT_IN_TAGINFO
) {
1158 tmp
= tx_pipe
->switch_to_port
;
1159 set_words((u32
*)&tmp
, 1, &desc
->tag_info
);
1162 /* submit packet descriptor */
1163 ret
= knav_pool_desc_map(netcp
->tx_pool
, desc
, sizeof(*desc
), &dma
,
1165 if (unlikely(ret
)) {
1166 dev_err(netcp
->ndev_dev
, "%s() failed to map desc\n", __func__
);
1170 skb_tx_timestamp(skb
);
1171 knav_queue_push(tx_pipe
->dma_queue
, dma
, dma_sz
, 0);
1177 /* Submit the packet */
1178 static int netcp_ndo_start_xmit(struct sk_buff
*skb
, struct net_device
*ndev
)
1180 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1181 int subqueue
= skb_get_queue_mapping(skb
);
1182 struct knav_dma_desc
*desc
;
1183 int desc_count
, ret
= 0;
1185 if (unlikely(skb
->len
<= 0)) {
1187 return NETDEV_TX_OK
;
1190 if (unlikely(skb
->len
< NETCP_MIN_PACKET_SIZE
)) {
1191 ret
= skb_padto(skb
, NETCP_MIN_PACKET_SIZE
);
1193 /* If we get here, the skb has already been dropped */
1194 dev_warn(netcp
->ndev_dev
, "padding failed (%d), packet dropped\n",
1196 ndev
->stats
.tx_dropped
++;
1199 skb
->len
= NETCP_MIN_PACKET_SIZE
;
1202 desc
= netcp_tx_map_skb(skb
, netcp
);
1203 if (unlikely(!desc
)) {
1204 netif_stop_subqueue(ndev
, subqueue
);
1209 ret
= netcp_tx_submit_skb(netcp
, skb
, desc
);
1213 ndev
->trans_start
= jiffies
;
1215 /* Check Tx pool count & stop subqueue if needed */
1216 desc_count
= knav_pool_count(netcp
->tx_pool
);
1217 if (desc_count
< netcp
->tx_pause_threshold
) {
1218 dev_dbg(netcp
->ndev_dev
, "pausing tx, count(%d)\n", desc_count
);
1219 netif_stop_subqueue(ndev
, subqueue
);
1221 return NETDEV_TX_OK
;
1224 ndev
->stats
.tx_dropped
++;
1226 netcp_free_tx_desc_chain(netcp
, desc
, sizeof(*desc
));
1231 int netcp_txpipe_close(struct netcp_tx_pipe
*tx_pipe
)
1233 if (tx_pipe
->dma_channel
) {
1234 knav_dma_close_channel(tx_pipe
->dma_channel
);
1235 tx_pipe
->dma_channel
= NULL
;
1239 EXPORT_SYMBOL_GPL(netcp_txpipe_close
);
1241 int netcp_txpipe_open(struct netcp_tx_pipe
*tx_pipe
)
1243 struct device
*dev
= tx_pipe
->netcp_device
->device
;
1244 struct knav_dma_cfg config
;
1248 memset(&config
, 0, sizeof(config
));
1249 config
.direction
= DMA_MEM_TO_DEV
;
1250 config
.u
.tx
.filt_einfo
= false;
1251 config
.u
.tx
.filt_pswords
= false;
1252 config
.u
.tx
.priority
= DMA_PRIO_MED_L
;
1254 tx_pipe
->dma_channel
= knav_dma_open_channel(dev
,
1255 tx_pipe
->dma_chan_name
, &config
);
1256 if (IS_ERR_OR_NULL(tx_pipe
->dma_channel
)) {
1257 dev_err(dev
, "failed opening tx chan(%s)\n",
1258 tx_pipe
->dma_chan_name
);
1262 snprintf(name
, sizeof(name
), "tx-pipe-%s", dev_name(dev
));
1263 tx_pipe
->dma_queue
= knav_queue_open(name
, tx_pipe
->dma_queue_id
,
1265 if (IS_ERR(tx_pipe
->dma_queue
)) {
1266 dev_err(dev
, "Could not open DMA queue for channel \"%s\": %d\n",
1268 ret
= PTR_ERR(tx_pipe
->dma_queue
);
1272 dev_dbg(dev
, "opened tx pipe %s\n", name
);
1276 if (!IS_ERR_OR_NULL(tx_pipe
->dma_channel
))
1277 knav_dma_close_channel(tx_pipe
->dma_channel
);
1278 tx_pipe
->dma_channel
= NULL
;
1281 EXPORT_SYMBOL_GPL(netcp_txpipe_open
);
1283 int netcp_txpipe_init(struct netcp_tx_pipe
*tx_pipe
,
1284 struct netcp_device
*netcp_device
,
1285 const char *dma_chan_name
, unsigned int dma_queue_id
)
1287 memset(tx_pipe
, 0, sizeof(*tx_pipe
));
1288 tx_pipe
->netcp_device
= netcp_device
;
1289 tx_pipe
->dma_chan_name
= dma_chan_name
;
1290 tx_pipe
->dma_queue_id
= dma_queue_id
;
1293 EXPORT_SYMBOL_GPL(netcp_txpipe_init
);
1295 static struct netcp_addr
*netcp_addr_find(struct netcp_intf
*netcp
,
1297 enum netcp_addr_type type
)
1299 struct netcp_addr
*naddr
;
1301 list_for_each_entry(naddr
, &netcp
->addr_list
, node
) {
1302 if (naddr
->type
!= type
)
1304 if (addr
&& memcmp(addr
, naddr
->addr
, ETH_ALEN
))
1312 static struct netcp_addr
*netcp_addr_add(struct netcp_intf
*netcp
,
1314 enum netcp_addr_type type
)
1316 struct netcp_addr
*naddr
;
1318 naddr
= devm_kmalloc(netcp
->dev
, sizeof(*naddr
), GFP_ATOMIC
);
1324 naddr
->netcp
= netcp
;
1326 ether_addr_copy(naddr
->addr
, addr
);
1328 eth_zero_addr(naddr
->addr
);
1329 list_add_tail(&naddr
->node
, &netcp
->addr_list
);
1334 static void netcp_addr_del(struct netcp_intf
*netcp
, struct netcp_addr
*naddr
)
1336 list_del(&naddr
->node
);
1337 devm_kfree(netcp
->dev
, naddr
);
1340 static void netcp_addr_clear_mark(struct netcp_intf
*netcp
)
1342 struct netcp_addr
*naddr
;
1344 list_for_each_entry(naddr
, &netcp
->addr_list
, node
)
1348 static void netcp_addr_add_mark(struct netcp_intf
*netcp
, const u8
*addr
,
1349 enum netcp_addr_type type
)
1351 struct netcp_addr
*naddr
;
1353 naddr
= netcp_addr_find(netcp
, addr
, type
);
1355 naddr
->flags
|= ADDR_VALID
;
1359 naddr
= netcp_addr_add(netcp
, addr
, type
);
1360 if (!WARN_ON(!naddr
))
1361 naddr
->flags
|= ADDR_NEW
;
1364 static void netcp_addr_sweep_del(struct netcp_intf
*netcp
)
1366 struct netcp_addr
*naddr
, *tmp
;
1367 struct netcp_intf_modpriv
*priv
;
1368 struct netcp_module
*module
;
1371 list_for_each_entry_safe(naddr
, tmp
, &netcp
->addr_list
, node
) {
1372 if (naddr
->flags
& (ADDR_VALID
| ADDR_NEW
))
1374 dev_dbg(netcp
->ndev_dev
, "deleting address %pM, type %x\n",
1375 naddr
->addr
, naddr
->type
);
1376 mutex_lock(&netcp_modules_lock
);
1377 for_each_module(netcp
, priv
) {
1378 module
= priv
->netcp_module
;
1379 if (!module
->del_addr
)
1381 error
= module
->del_addr(priv
->module_priv
,
1385 mutex_unlock(&netcp_modules_lock
);
1386 netcp_addr_del(netcp
, naddr
);
1390 static void netcp_addr_sweep_add(struct netcp_intf
*netcp
)
1392 struct netcp_addr
*naddr
, *tmp
;
1393 struct netcp_intf_modpriv
*priv
;
1394 struct netcp_module
*module
;
1397 list_for_each_entry_safe(naddr
, tmp
, &netcp
->addr_list
, node
) {
1398 if (!(naddr
->flags
& ADDR_NEW
))
1400 dev_dbg(netcp
->ndev_dev
, "adding address %pM, type %x\n",
1401 naddr
->addr
, naddr
->type
);
1402 mutex_lock(&netcp_modules_lock
);
1403 for_each_module(netcp
, priv
) {
1404 module
= priv
->netcp_module
;
1405 if (!module
->add_addr
)
1407 error
= module
->add_addr(priv
->module_priv
, naddr
);
1410 mutex_unlock(&netcp_modules_lock
);
1414 static void netcp_set_rx_mode(struct net_device
*ndev
)
1416 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1417 struct netdev_hw_addr
*ndev_addr
;
1420 promisc
= (ndev
->flags
& IFF_PROMISC
||
1421 ndev
->flags
& IFF_ALLMULTI
||
1422 netdev_mc_count(ndev
) > NETCP_MAX_MCAST_ADDR
);
1424 /* first clear all marks */
1425 netcp_addr_clear_mark(netcp
);
1427 /* next add new entries, mark existing ones */
1428 netcp_addr_add_mark(netcp
, ndev
->broadcast
, ADDR_BCAST
);
1429 for_each_dev_addr(ndev
, ndev_addr
)
1430 netcp_addr_add_mark(netcp
, ndev_addr
->addr
, ADDR_DEV
);
1431 netdev_for_each_uc_addr(ndev_addr
, ndev
)
1432 netcp_addr_add_mark(netcp
, ndev_addr
->addr
, ADDR_UCAST
);
1433 netdev_for_each_mc_addr(ndev_addr
, ndev
)
1434 netcp_addr_add_mark(netcp
, ndev_addr
->addr
, ADDR_MCAST
);
1437 netcp_addr_add_mark(netcp
, NULL
, ADDR_ANY
);
1439 /* finally sweep and callout into modules */
1440 netcp_addr_sweep_del(netcp
);
1441 netcp_addr_sweep_add(netcp
);
1444 static void netcp_free_navigator_resources(struct netcp_intf
*netcp
)
1448 if (netcp
->rx_channel
) {
1449 knav_dma_close_channel(netcp
->rx_channel
);
1450 netcp
->rx_channel
= NULL
;
1453 if (!IS_ERR_OR_NULL(netcp
->rx_pool
))
1454 netcp_rxpool_free(netcp
);
1456 if (!IS_ERR_OR_NULL(netcp
->rx_queue
)) {
1457 knav_queue_close(netcp
->rx_queue
);
1458 netcp
->rx_queue
= NULL
;
1461 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&&
1462 !IS_ERR_OR_NULL(netcp
->rx_fdq
[i
]) ; ++i
) {
1463 knav_queue_close(netcp
->rx_fdq
[i
]);
1464 netcp
->rx_fdq
[i
] = NULL
;
1467 if (!IS_ERR_OR_NULL(netcp
->tx_compl_q
)) {
1468 knav_queue_close(netcp
->tx_compl_q
);
1469 netcp
->tx_compl_q
= NULL
;
1472 if (!IS_ERR_OR_NULL(netcp
->tx_pool
)) {
1473 knav_pool_destroy(netcp
->tx_pool
);
1474 netcp
->tx_pool
= NULL
;
1478 static int netcp_setup_navigator_resources(struct net_device
*ndev
)
1480 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1481 struct knav_queue_notify_config notify_cfg
;
1482 struct knav_dma_cfg config
;
1488 /* Create Rx/Tx descriptor pools */
1489 snprintf(name
, sizeof(name
), "rx-pool-%s", ndev
->name
);
1490 netcp
->rx_pool
= knav_pool_create(name
, netcp
->rx_pool_size
,
1491 netcp
->rx_pool_region_id
);
1492 if (IS_ERR_OR_NULL(netcp
->rx_pool
)) {
1493 dev_err(netcp
->ndev_dev
, "Couldn't create rx pool\n");
1494 ret
= PTR_ERR(netcp
->rx_pool
);
1498 snprintf(name
, sizeof(name
), "tx-pool-%s", ndev
->name
);
1499 netcp
->tx_pool
= knav_pool_create(name
, netcp
->tx_pool_size
,
1500 netcp
->tx_pool_region_id
);
1501 if (IS_ERR_OR_NULL(netcp
->tx_pool
)) {
1502 dev_err(netcp
->ndev_dev
, "Couldn't create tx pool\n");
1503 ret
= PTR_ERR(netcp
->tx_pool
);
1507 /* open Tx completion queue */
1508 snprintf(name
, sizeof(name
), "tx-compl-%s", ndev
->name
);
1509 netcp
->tx_compl_q
= knav_queue_open(name
, netcp
->tx_compl_qid
, 0);
1510 if (IS_ERR_OR_NULL(netcp
->tx_compl_q
)) {
1511 ret
= PTR_ERR(netcp
->tx_compl_q
);
1514 netcp
->tx_compl_qid
= knav_queue_get_id(netcp
->tx_compl_q
);
1516 /* Set notification for Tx completion */
1517 notify_cfg
.fn
= netcp_tx_notify
;
1518 notify_cfg
.fn_arg
= netcp
;
1519 ret
= knav_queue_device_control(netcp
->tx_compl_q
,
1520 KNAV_QUEUE_SET_NOTIFIER
,
1521 (unsigned long)¬ify_cfg
);
1525 knav_queue_disable_notify(netcp
->tx_compl_q
);
1527 /* open Rx completion queue */
1528 snprintf(name
, sizeof(name
), "rx-compl-%s", ndev
->name
);
1529 netcp
->rx_queue
= knav_queue_open(name
, netcp
->rx_queue_id
, 0);
1530 if (IS_ERR_OR_NULL(netcp
->rx_queue
)) {
1531 ret
= PTR_ERR(netcp
->rx_queue
);
1534 netcp
->rx_queue_id
= knav_queue_get_id(netcp
->rx_queue
);
1536 /* Set notification for Rx completion */
1537 notify_cfg
.fn
= netcp_rx_notify
;
1538 notify_cfg
.fn_arg
= netcp
;
1539 ret
= knav_queue_device_control(netcp
->rx_queue
,
1540 KNAV_QUEUE_SET_NOTIFIER
,
1541 (unsigned long)¬ify_cfg
);
1545 knav_queue_disable_notify(netcp
->rx_queue
);
1548 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&& netcp
->rx_queue_depths
[i
];
1550 snprintf(name
, sizeof(name
), "rx-fdq-%s-%d", ndev
->name
, i
);
1551 netcp
->rx_fdq
[i
] = knav_queue_open(name
, KNAV_QUEUE_GP
, 0);
1552 if (IS_ERR_OR_NULL(netcp
->rx_fdq
[i
])) {
1553 ret
= PTR_ERR(netcp
->rx_fdq
[i
]);
1558 memset(&config
, 0, sizeof(config
));
1559 config
.direction
= DMA_DEV_TO_MEM
;
1560 config
.u
.rx
.einfo_present
= true;
1561 config
.u
.rx
.psinfo_present
= true;
1562 config
.u
.rx
.err_mode
= DMA_DROP
;
1563 config
.u
.rx
.desc_type
= DMA_DESC_HOST
;
1564 config
.u
.rx
.psinfo_at_sop
= false;
1565 config
.u
.rx
.sop_offset
= NETCP_SOP_OFFSET
;
1566 config
.u
.rx
.dst_q
= netcp
->rx_queue_id
;
1567 config
.u
.rx
.thresh
= DMA_THRESH_NONE
;
1569 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
; ++i
) {
1570 if (netcp
->rx_fdq
[i
])
1571 last_fdq
= knav_queue_get_id(netcp
->rx_fdq
[i
]);
1572 config
.u
.rx
.fdq
[i
] = last_fdq
;
1575 netcp
->rx_channel
= knav_dma_open_channel(netcp
->netcp_device
->device
,
1576 netcp
->dma_chan_name
, &config
);
1577 if (IS_ERR_OR_NULL(netcp
->rx_channel
)) {
1578 dev_err(netcp
->ndev_dev
, "failed opening rx chan(%s\n",
1579 netcp
->dma_chan_name
);
1583 dev_dbg(netcp
->ndev_dev
, "opened RX channel: %p\n", netcp
->rx_channel
);
1587 netcp_free_navigator_resources(netcp
);
1591 /* Open the device */
1592 static int netcp_ndo_open(struct net_device
*ndev
)
1594 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1595 struct netcp_intf_modpriv
*intf_modpriv
;
1596 struct netcp_module
*module
;
1599 netif_carrier_off(ndev
);
1600 ret
= netcp_setup_navigator_resources(ndev
);
1602 dev_err(netcp
->ndev_dev
, "Failed to setup navigator resources\n");
1606 mutex_lock(&netcp_modules_lock
);
1607 for_each_module(netcp
, intf_modpriv
) {
1608 module
= intf_modpriv
->netcp_module
;
1610 ret
= module
->open(intf_modpriv
->module_priv
, ndev
);
1612 dev_err(netcp
->ndev_dev
, "module open failed\n");
1617 mutex_unlock(&netcp_modules_lock
);
1619 napi_enable(&netcp
->rx_napi
);
1620 napi_enable(&netcp
->tx_napi
);
1621 knav_queue_enable_notify(netcp
->tx_compl_q
);
1622 knav_queue_enable_notify(netcp
->rx_queue
);
1623 netcp_rxpool_refill(netcp
);
1624 netif_tx_wake_all_queues(ndev
);
1625 dev_dbg(netcp
->ndev_dev
, "netcp device %s opened\n", ndev
->name
);
1629 for_each_module(netcp
, intf_modpriv
) {
1630 module
= intf_modpriv
->netcp_module
;
1632 module
->close(intf_modpriv
->module_priv
, ndev
);
1634 mutex_unlock(&netcp_modules_lock
);
1637 netcp_free_navigator_resources(netcp
);
1641 /* Close the device */
1642 static int netcp_ndo_stop(struct net_device
*ndev
)
1644 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1645 struct netcp_intf_modpriv
*intf_modpriv
;
1646 struct netcp_module
*module
;
1649 netif_tx_stop_all_queues(ndev
);
1650 netif_carrier_off(ndev
);
1651 netcp_addr_clear_mark(netcp
);
1652 netcp_addr_sweep_del(netcp
);
1653 knav_queue_disable_notify(netcp
->rx_queue
);
1654 knav_queue_disable_notify(netcp
->tx_compl_q
);
1655 napi_disable(&netcp
->rx_napi
);
1656 napi_disable(&netcp
->tx_napi
);
1658 mutex_lock(&netcp_modules_lock
);
1659 for_each_module(netcp
, intf_modpriv
) {
1660 module
= intf_modpriv
->netcp_module
;
1661 if (module
->close
) {
1662 err
= module
->close(intf_modpriv
->module_priv
, ndev
);
1664 dev_err(netcp
->ndev_dev
, "Close failed\n");
1667 mutex_unlock(&netcp_modules_lock
);
1669 /* Recycle Rx descriptors from completion queue */
1670 netcp_empty_rx_queue(netcp
);
1672 /* Recycle Tx descriptors from completion queue */
1673 netcp_process_tx_compl_packets(netcp
, netcp
->tx_pool_size
);
1675 if (knav_pool_count(netcp
->tx_pool
) != netcp
->tx_pool_size
)
1676 dev_err(netcp
->ndev_dev
, "Lost (%d) Tx descs\n",
1677 netcp
->tx_pool_size
- knav_pool_count(netcp
->tx_pool
));
1679 netcp_free_navigator_resources(netcp
);
1680 dev_dbg(netcp
->ndev_dev
, "netcp device %s stopped\n", ndev
->name
);
1684 static int netcp_ndo_ioctl(struct net_device
*ndev
,
1685 struct ifreq
*req
, int cmd
)
1687 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1688 struct netcp_intf_modpriv
*intf_modpriv
;
1689 struct netcp_module
*module
;
1690 int ret
= -1, err
= -EOPNOTSUPP
;
1692 if (!netif_running(ndev
))
1695 mutex_lock(&netcp_modules_lock
);
1696 for_each_module(netcp
, intf_modpriv
) {
1697 module
= intf_modpriv
->netcp_module
;
1701 err
= module
->ioctl(intf_modpriv
->module_priv
, req
, cmd
);
1702 if ((err
< 0) && (err
!= -EOPNOTSUPP
)) {
1711 mutex_unlock(&netcp_modules_lock
);
1712 return (ret
== 0) ? 0 : err
;
1715 static int netcp_ndo_change_mtu(struct net_device
*ndev
, int new_mtu
)
1717 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1719 /* MTU < 68 is an error for IPv4 traffic */
1720 if ((new_mtu
< 68) ||
1721 (new_mtu
> (NETCP_MAX_FRAME_SIZE
- ETH_HLEN
- ETH_FCS_LEN
))) {
1722 dev_err(netcp
->ndev_dev
, "Invalid mtu size = %d\n", new_mtu
);
1726 ndev
->mtu
= new_mtu
;
1730 static void netcp_ndo_tx_timeout(struct net_device
*ndev
)
1732 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1733 unsigned int descs
= knav_pool_count(netcp
->tx_pool
);
1735 dev_err(netcp
->ndev_dev
, "transmit timed out tx descs(%d)\n", descs
);
1736 netcp_process_tx_compl_packets(netcp
, netcp
->tx_pool_size
);
1737 ndev
->trans_start
= jiffies
;
1738 netif_tx_wake_all_queues(ndev
);
1741 static int netcp_rx_add_vid(struct net_device
*ndev
, __be16 proto
, u16 vid
)
1743 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1744 struct netcp_intf_modpriv
*intf_modpriv
;
1745 struct netcp_module
*module
;
1748 dev_dbg(netcp
->ndev_dev
, "adding rx vlan id: %d\n", vid
);
1750 mutex_lock(&netcp_modules_lock
);
1751 for_each_module(netcp
, intf_modpriv
) {
1752 module
= intf_modpriv
->netcp_module
;
1753 if ((module
->add_vid
) && (vid
!= 0)) {
1754 err
= module
->add_vid(intf_modpriv
->module_priv
, vid
);
1756 dev_err(netcp
->ndev_dev
, "Could not add vlan id = %d\n",
1762 mutex_unlock(&netcp_modules_lock
);
1766 static int netcp_rx_kill_vid(struct net_device
*ndev
, __be16 proto
, u16 vid
)
1768 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1769 struct netcp_intf_modpriv
*intf_modpriv
;
1770 struct netcp_module
*module
;
1773 dev_dbg(netcp
->ndev_dev
, "removing rx vlan id: %d\n", vid
);
1775 mutex_lock(&netcp_modules_lock
);
1776 for_each_module(netcp
, intf_modpriv
) {
1777 module
= intf_modpriv
->netcp_module
;
1778 if (module
->del_vid
) {
1779 err
= module
->del_vid(intf_modpriv
->module_priv
, vid
);
1781 dev_err(netcp
->ndev_dev
, "Could not delete vlan id = %d\n",
1787 mutex_unlock(&netcp_modules_lock
);
1791 static u16
netcp_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
1793 select_queue_fallback_t fallback
)
1798 static int netcp_setup_tc(struct net_device
*dev
, u8 num_tc
)
1802 /* setup tc must be called under rtnl lock */
1805 /* Sanity-check the number of traffic classes requested */
1806 if ((dev
->real_num_tx_queues
<= 1) ||
1807 (dev
->real_num_tx_queues
< num_tc
))
1810 /* Configure traffic class to queue mappings */
1812 netdev_set_num_tc(dev
, num_tc
);
1813 for (i
= 0; i
< num_tc
; i
++)
1814 netdev_set_tc_queue(dev
, i
, 1, i
);
1816 netdev_reset_tc(dev
);
1822 static const struct net_device_ops netcp_netdev_ops
= {
1823 .ndo_open
= netcp_ndo_open
,
1824 .ndo_stop
= netcp_ndo_stop
,
1825 .ndo_start_xmit
= netcp_ndo_start_xmit
,
1826 .ndo_set_rx_mode
= netcp_set_rx_mode
,
1827 .ndo_do_ioctl
= netcp_ndo_ioctl
,
1828 .ndo_change_mtu
= netcp_ndo_change_mtu
,
1829 .ndo_set_mac_address
= eth_mac_addr
,
1830 .ndo_validate_addr
= eth_validate_addr
,
1831 .ndo_vlan_rx_add_vid
= netcp_rx_add_vid
,
1832 .ndo_vlan_rx_kill_vid
= netcp_rx_kill_vid
,
1833 .ndo_tx_timeout
= netcp_ndo_tx_timeout
,
1834 .ndo_select_queue
= netcp_select_queue
,
1835 .ndo_setup_tc
= netcp_setup_tc
,
1838 static int netcp_create_interface(struct netcp_device
*netcp_device
,
1839 struct device_node
*node_interface
)
1841 struct device
*dev
= netcp_device
->device
;
1842 struct device_node
*node
= dev
->of_node
;
1843 struct netcp_intf
*netcp
;
1844 struct net_device
*ndev
;
1845 resource_size_t size
;
1846 struct resource res
;
1847 void __iomem
*efuse
= NULL
;
1849 const void *mac_addr
;
1850 u8 efuse_mac_addr
[6];
1854 ndev
= alloc_etherdev_mqs(sizeof(*netcp
), 1, 1);
1856 dev_err(dev
, "Error allocating netdev\n");
1860 ndev
->features
|= NETIF_F_SG
;
1861 ndev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
1862 ndev
->hw_features
= ndev
->features
;
1863 ndev
->vlan_features
|= NETIF_F_SG
;
1865 netcp
= netdev_priv(ndev
);
1866 spin_lock_init(&netcp
->lock
);
1867 INIT_LIST_HEAD(&netcp
->module_head
);
1868 INIT_LIST_HEAD(&netcp
->txhook_list_head
);
1869 INIT_LIST_HEAD(&netcp
->rxhook_list_head
);
1870 INIT_LIST_HEAD(&netcp
->addr_list
);
1871 netcp
->netcp_device
= netcp_device
;
1872 netcp
->dev
= netcp_device
->device
;
1874 netcp
->ndev_dev
= &ndev
->dev
;
1875 netcp
->msg_enable
= netif_msg_init(netcp_debug_level
, NETCP_DEBUG
);
1876 netcp
->tx_pause_threshold
= MAX_SKB_FRAGS
;
1877 netcp
->tx_resume_threshold
= netcp
->tx_pause_threshold
;
1878 netcp
->node_interface
= node_interface
;
1880 ret
= of_property_read_u32(node_interface
, "efuse-mac", &efuse_mac
);
1882 if (of_address_to_resource(node
, NETCP_EFUSE_REG_INDEX
, &res
)) {
1883 dev_err(dev
, "could not find efuse-mac reg resource\n");
1887 size
= resource_size(&res
);
1889 if (!devm_request_mem_region(dev
, res
.start
, size
,
1891 dev_err(dev
, "could not reserve resource\n");
1896 efuse
= devm_ioremap_nocache(dev
, res
.start
, size
);
1898 dev_err(dev
, "could not map resource\n");
1899 devm_release_mem_region(dev
, res
.start
, size
);
1904 emac_arch_get_mac_addr(efuse_mac_addr
, efuse
);
1905 if (is_valid_ether_addr(efuse_mac_addr
))
1906 ether_addr_copy(ndev
->dev_addr
, efuse_mac_addr
);
1908 random_ether_addr(ndev
->dev_addr
);
1910 devm_iounmap(dev
, efuse
);
1911 devm_release_mem_region(dev
, res
.start
, size
);
1913 mac_addr
= of_get_mac_address(node_interface
);
1915 ether_addr_copy(ndev
->dev_addr
, mac_addr
);
1917 random_ether_addr(ndev
->dev_addr
);
1920 ret
= of_property_read_string(node_interface
, "rx-channel",
1921 &netcp
->dma_chan_name
);
1923 dev_err(dev
, "missing \"rx-channel\" parameter\n");
1928 ret
= of_property_read_u32(node_interface
, "rx-queue",
1929 &netcp
->rx_queue_id
);
1931 dev_warn(dev
, "missing \"rx-queue\" parameter\n");
1932 netcp
->rx_queue_id
= KNAV_QUEUE_QPEND
;
1935 ret
= of_property_read_u32_array(node_interface
, "rx-queue-depth",
1936 netcp
->rx_queue_depths
,
1937 KNAV_DMA_FDQ_PER_CHAN
);
1939 dev_err(dev
, "missing \"rx-queue-depth\" parameter\n");
1940 netcp
->rx_queue_depths
[0] = 128;
1943 ret
= of_property_read_u32_array(node_interface
, "rx-pool", temp
, 2);
1945 dev_err(dev
, "missing \"rx-pool\" parameter\n");
1949 netcp
->rx_pool_size
= temp
[0];
1950 netcp
->rx_pool_region_id
= temp
[1];
1952 ret
= of_property_read_u32_array(node_interface
, "tx-pool", temp
, 2);
1954 dev_err(dev
, "missing \"tx-pool\" parameter\n");
1958 netcp
->tx_pool_size
= temp
[0];
1959 netcp
->tx_pool_region_id
= temp
[1];
1961 if (netcp
->tx_pool_size
< MAX_SKB_FRAGS
) {
1962 dev_err(dev
, "tx-pool size too small, must be atleast(%ld)\n",
1968 ret
= of_property_read_u32(node_interface
, "tx-completion-queue",
1969 &netcp
->tx_compl_qid
);
1971 dev_warn(dev
, "missing \"tx-completion-queue\" parameter\n");
1972 netcp
->tx_compl_qid
= KNAV_QUEUE_QPEND
;
1976 netif_napi_add(ndev
, &netcp
->rx_napi
, netcp_rx_poll
, NETCP_NAPI_WEIGHT
);
1977 netif_napi_add(ndev
, &netcp
->tx_napi
, netcp_tx_poll
, NETCP_NAPI_WEIGHT
);
1979 /* Register the network device */
1981 ndev
->watchdog_timeo
= NETCP_TX_TIMEOUT
;
1982 ndev
->netdev_ops
= &netcp_netdev_ops
;
1983 SET_NETDEV_DEV(ndev
, dev
);
1985 list_add_tail(&netcp
->interface_list
, &netcp_device
->interface_head
);
1993 static void netcp_delete_interface(struct netcp_device
*netcp_device
,
1994 struct net_device
*ndev
)
1996 struct netcp_intf_modpriv
*intf_modpriv
, *tmp
;
1997 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1998 struct netcp_module
*module
;
2000 dev_dbg(netcp_device
->device
, "Removing interface \"%s\"\n",
2003 /* Notify each of the modules that the interface is going away */
2004 list_for_each_entry_safe(intf_modpriv
, tmp
, &netcp
->module_head
,
2006 module
= intf_modpriv
->netcp_module
;
2007 dev_dbg(netcp_device
->device
, "Releasing module \"%s\"\n",
2009 if (module
->release
)
2010 module
->release(intf_modpriv
->module_priv
);
2011 list_del(&intf_modpriv
->intf_list
);
2012 kfree(intf_modpriv
);
2014 WARN(!list_empty(&netcp
->module_head
), "%s interface module list is not empty!\n",
2017 list_del(&netcp
->interface_list
);
2019 of_node_put(netcp
->node_interface
);
2020 unregister_netdev(ndev
);
2021 netif_napi_del(&netcp
->rx_napi
);
2025 static int netcp_probe(struct platform_device
*pdev
)
2027 struct device_node
*node
= pdev
->dev
.of_node
;
2028 struct netcp_intf
*netcp_intf
, *netcp_tmp
;
2029 struct device_node
*child
, *interfaces
;
2030 struct netcp_device
*netcp_device
;
2031 struct device
*dev
= &pdev
->dev
;
2032 struct netcp_module
*module
;
2036 dev_err(dev
, "could not find device info\n");
2040 /* Allocate a new NETCP device instance */
2041 netcp_device
= devm_kzalloc(dev
, sizeof(*netcp_device
), GFP_KERNEL
);
2045 pm_runtime_enable(&pdev
->dev
);
2046 ret
= pm_runtime_get_sync(&pdev
->dev
);
2048 dev_err(dev
, "Failed to enable NETCP power-domain\n");
2049 pm_runtime_disable(&pdev
->dev
);
2053 /* Initialize the NETCP device instance */
2054 INIT_LIST_HEAD(&netcp_device
->interface_head
);
2055 INIT_LIST_HEAD(&netcp_device
->modpriv_head
);
2056 netcp_device
->device
= dev
;
2057 platform_set_drvdata(pdev
, netcp_device
);
2059 /* create interfaces */
2060 interfaces
= of_get_child_by_name(node
, "netcp-interfaces");
2062 dev_err(dev
, "could not find netcp-interfaces node\n");
2067 for_each_available_child_of_node(interfaces
, child
) {
2068 ret
= netcp_create_interface(netcp_device
, child
);
2070 dev_err(dev
, "could not create interface(%s)\n",
2072 goto probe_quit_interface
;
2076 /* Add the device instance to the list */
2077 list_add_tail(&netcp_device
->device_list
, &netcp_devices
);
2079 /* Probe & attach any modules already registered */
2080 mutex_lock(&netcp_modules_lock
);
2081 for_each_netcp_module(module
) {
2082 ret
= netcp_module_probe(netcp_device
, module
);
2084 dev_err(dev
, "module(%s) probe failed\n", module
->name
);
2086 mutex_unlock(&netcp_modules_lock
);
2089 probe_quit_interface
:
2090 list_for_each_entry_safe(netcp_intf
, netcp_tmp
,
2091 &netcp_device
->interface_head
,
2093 netcp_delete_interface(netcp_device
, netcp_intf
->ndev
);
2097 pm_runtime_put_sync(&pdev
->dev
);
2098 pm_runtime_disable(&pdev
->dev
);
2099 platform_set_drvdata(pdev
, NULL
);
2103 static int netcp_remove(struct platform_device
*pdev
)
2105 struct netcp_device
*netcp_device
= platform_get_drvdata(pdev
);
2106 struct netcp_intf
*netcp_intf
, *netcp_tmp
;
2107 struct netcp_inst_modpriv
*inst_modpriv
, *tmp
;
2108 struct netcp_module
*module
;
2110 list_for_each_entry_safe(inst_modpriv
, tmp
, &netcp_device
->modpriv_head
,
2112 module
= inst_modpriv
->netcp_module
;
2113 dev_dbg(&pdev
->dev
, "Removing module \"%s\"\n", module
->name
);
2114 module
->remove(netcp_device
, inst_modpriv
->module_priv
);
2115 list_del(&inst_modpriv
->inst_list
);
2116 kfree(inst_modpriv
);
2119 /* now that all modules are removed, clean up the interfaces */
2120 list_for_each_entry_safe(netcp_intf
, netcp_tmp
,
2121 &netcp_device
->interface_head
,
2123 netcp_delete_interface(netcp_device
, netcp_intf
->ndev
);
2126 WARN(!list_empty(&netcp_device
->interface_head
),
2127 "%s interface list not empty!\n", pdev
->name
);
2129 pm_runtime_put_sync(&pdev
->dev
);
2130 pm_runtime_disable(&pdev
->dev
);
2131 platform_set_drvdata(pdev
, NULL
);
2135 static const struct of_device_id of_match
[] = {
2136 { .compatible
= "ti,netcp-1.0", },
2139 MODULE_DEVICE_TABLE(of
, of_match
);
2141 static struct platform_driver netcp_driver
= {
2143 .name
= "netcp-1.0",
2144 .owner
= THIS_MODULE
,
2145 .of_match_table
= of_match
,
2147 .probe
= netcp_probe
,
2148 .remove
= netcp_remove
,
2150 module_platform_driver(netcp_driver
);
2152 MODULE_LICENSE("GPL v2");
2153 MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs");
2154 MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com");