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 NETCP_EFUSE_ADDR_SWAP 2
57 #define knav_queue_get_id(q) knav_queue_device_control(q, \
58 KNAV_QUEUE_GET_ID, (unsigned long)NULL)
60 #define knav_queue_enable_notify(q) knav_queue_device_control(q, \
61 KNAV_QUEUE_ENABLE_NOTIFY, \
64 #define knav_queue_disable_notify(q) knav_queue_device_control(q, \
65 KNAV_QUEUE_DISABLE_NOTIFY, \
68 #define knav_queue_get_count(q) knav_queue_device_control(q, \
69 KNAV_QUEUE_GET_COUNT, (unsigned long)NULL)
71 #define for_each_netcp_module(module) \
72 list_for_each_entry(module, &netcp_modules, module_list)
74 #define for_each_netcp_device_module(netcp_device, inst_modpriv) \
75 list_for_each_entry(inst_modpriv, \
76 &((netcp_device)->modpriv_head), inst_list)
78 #define for_each_module(netcp, intf_modpriv) \
79 list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list)
81 /* Module management structures */
83 struct list_head device_list
;
84 struct list_head interface_head
;
85 struct list_head modpriv_head
;
86 struct device
*device
;
89 struct netcp_inst_modpriv
{
90 struct netcp_device
*netcp_device
;
91 struct netcp_module
*netcp_module
;
92 struct list_head inst_list
;
96 struct netcp_intf_modpriv
{
97 struct netcp_intf
*netcp_priv
;
98 struct netcp_module
*netcp_module
;
99 struct list_head intf_list
;
103 static LIST_HEAD(netcp_devices
);
104 static LIST_HEAD(netcp_modules
);
105 static DEFINE_MUTEX(netcp_modules_lock
);
107 static int netcp_debug_level
= -1;
108 module_param(netcp_debug_level
, int, 0);
109 MODULE_PARM_DESC(netcp_debug_level
, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");
111 /* Helper functions - Get/Set */
112 static void get_pkt_info(dma_addr_t
*buff
, u32
*buff_len
, dma_addr_t
*ndesc
,
113 struct knav_dma_desc
*desc
)
115 *buff_len
= le32_to_cpu(desc
->buff_len
);
116 *buff
= le32_to_cpu(desc
->buff
);
117 *ndesc
= le32_to_cpu(desc
->next_desc
);
120 static void get_pad_info(u32
*pad0
, u32
*pad1
, u32
*pad2
, struct knav_dma_desc
*desc
)
122 *pad0
= le32_to_cpu(desc
->pad
[0]);
123 *pad1
= le32_to_cpu(desc
->pad
[1]);
124 *pad2
= le32_to_cpu(desc
->pad
[2]);
127 static void get_pad_ptr(void **padptr
, struct knav_dma_desc
*desc
)
131 pad64
= le32_to_cpu(desc
->pad
[0]) +
132 ((u64
)le32_to_cpu(desc
->pad
[1]) << 32);
133 *padptr
= (void *)(uintptr_t)pad64
;
136 static void get_org_pkt_info(dma_addr_t
*buff
, u32
*buff_len
,
137 struct knav_dma_desc
*desc
)
139 *buff
= le32_to_cpu(desc
->orig_buff
);
140 *buff_len
= le32_to_cpu(desc
->orig_len
);
143 static void get_words(dma_addr_t
*words
, int num_words
, __le32
*desc
)
147 for (i
= 0; i
< num_words
; i
++)
148 words
[i
] = le32_to_cpu(desc
[i
]);
151 static void set_pkt_info(dma_addr_t buff
, u32 buff_len
, u32 ndesc
,
152 struct knav_dma_desc
*desc
)
154 desc
->buff_len
= cpu_to_le32(buff_len
);
155 desc
->buff
= cpu_to_le32(buff
);
156 desc
->next_desc
= cpu_to_le32(ndesc
);
159 static void set_desc_info(u32 desc_info
, u32 pkt_info
,
160 struct knav_dma_desc
*desc
)
162 desc
->desc_info
= cpu_to_le32(desc_info
);
163 desc
->packet_info
= cpu_to_le32(pkt_info
);
166 static void set_pad_info(u32 pad0
, u32 pad1
, u32 pad2
, struct knav_dma_desc
*desc
)
168 desc
->pad
[0] = cpu_to_le32(pad0
);
169 desc
->pad
[1] = cpu_to_le32(pad1
);
170 desc
->pad
[2] = cpu_to_le32(pad1
);
173 static void set_org_pkt_info(dma_addr_t buff
, u32 buff_len
,
174 struct knav_dma_desc
*desc
)
176 desc
->orig_buff
= cpu_to_le32(buff
);
177 desc
->orig_len
= cpu_to_le32(buff_len
);
180 static void set_words(u32
*words
, int num_words
, __le32
*desc
)
184 for (i
= 0; i
< num_words
; i
++)
185 desc
[i
] = cpu_to_le32(words
[i
]);
188 /* Read the e-fuse value as 32 bit values to be endian independent */
189 static int emac_arch_get_mac_addr(char *x
, void __iomem
*efuse_mac
, u32 swap
)
191 unsigned int addr0
, addr1
;
193 addr1
= readl(efuse_mac
+ 4);
194 addr0
= readl(efuse_mac
);
197 case NETCP_EFUSE_ADDR_SWAP
:
199 addr1
= readl(efuse_mac
);
205 x
[0] = (addr1
& 0x0000ff00) >> 8;
206 x
[1] = addr1
& 0x000000ff;
207 x
[2] = (addr0
& 0xff000000) >> 24;
208 x
[3] = (addr0
& 0x00ff0000) >> 16;
209 x
[4] = (addr0
& 0x0000ff00) >> 8;
210 x
[5] = addr0
& 0x000000ff;
215 static const char *netcp_node_name(struct device_node
*node
)
219 if (of_property_read_string(node
, "label", &name
) < 0)
226 /* Module management routines */
227 static int netcp_register_interface(struct netcp_intf
*netcp
)
231 ret
= register_netdev(netcp
->ndev
);
233 netcp
->netdev_registered
= true;
237 static int netcp_module_probe(struct netcp_device
*netcp_device
,
238 struct netcp_module
*module
)
240 struct device
*dev
= netcp_device
->device
;
241 struct device_node
*devices
, *interface
, *node
= dev
->of_node
;
242 struct device_node
*child
;
243 struct netcp_inst_modpriv
*inst_modpriv
;
244 struct netcp_intf
*netcp_intf
;
245 struct netcp_module
*tmp
;
246 bool primary_module_registered
= false;
249 /* Find this module in the sub-tree for this device */
250 devices
= of_get_child_by_name(node
, "netcp-devices");
252 dev_err(dev
, "could not find netcp-devices node\n");
253 return NETCP_MOD_PROBE_SKIPPED
;
256 for_each_available_child_of_node(devices
, child
) {
257 const char *name
= netcp_node_name(child
);
259 if (!strcasecmp(module
->name
, name
))
263 of_node_put(devices
);
264 /* If module not used for this device, skip it */
266 dev_warn(dev
, "module(%s) not used for device\n", module
->name
);
267 return NETCP_MOD_PROBE_SKIPPED
;
270 inst_modpriv
= devm_kzalloc(dev
, sizeof(*inst_modpriv
), GFP_KERNEL
);
276 inst_modpriv
->netcp_device
= netcp_device
;
277 inst_modpriv
->netcp_module
= module
;
278 list_add_tail(&inst_modpriv
->inst_list
, &netcp_device
->modpriv_head
);
280 ret
= module
->probe(netcp_device
, dev
, child
,
281 &inst_modpriv
->module_priv
);
284 dev_err(dev
, "Probe of module(%s) failed with %d\n",
286 list_del(&inst_modpriv
->inst_list
);
287 devm_kfree(dev
, inst_modpriv
);
288 return NETCP_MOD_PROBE_FAILED
;
291 /* Attach modules only if the primary module is probed */
292 for_each_netcp_module(tmp
) {
294 primary_module_registered
= true;
297 if (!primary_module_registered
)
300 /* Attach module to interfaces */
301 list_for_each_entry(netcp_intf
, &netcp_device
->interface_head
,
303 struct netcp_intf_modpriv
*intf_modpriv
;
305 intf_modpriv
= devm_kzalloc(dev
, sizeof(*intf_modpriv
),
310 interface
= of_parse_phandle(netcp_intf
->node_interface
,
314 devm_kfree(dev
, intf_modpriv
);
318 intf_modpriv
->netcp_priv
= netcp_intf
;
319 intf_modpriv
->netcp_module
= module
;
320 list_add_tail(&intf_modpriv
->intf_list
,
321 &netcp_intf
->module_head
);
323 ret
= module
->attach(inst_modpriv
->module_priv
,
324 netcp_intf
->ndev
, interface
,
325 &intf_modpriv
->module_priv
);
326 of_node_put(interface
);
328 dev_dbg(dev
, "Attach of module %s declined with %d\n",
330 list_del(&intf_modpriv
->intf_list
);
331 devm_kfree(dev
, intf_modpriv
);
336 /* Now register the interface with netdev */
337 list_for_each_entry(netcp_intf
,
338 &netcp_device
->interface_head
,
340 /* If interface not registered then register now */
341 if (!netcp_intf
->netdev_registered
) {
342 ret
= netcp_register_interface(netcp_intf
);
350 int netcp_register_module(struct netcp_module
*module
)
352 struct netcp_device
*netcp_device
;
353 struct netcp_module
*tmp
;
357 WARN(1, "error registering netcp module: no name\n");
361 if (!module
->probe
) {
362 WARN(1, "error registering netcp module: no probe\n");
366 mutex_lock(&netcp_modules_lock
);
368 for_each_netcp_module(tmp
) {
369 if (!strcasecmp(tmp
->name
, module
->name
)) {
370 mutex_unlock(&netcp_modules_lock
);
374 list_add_tail(&module
->module_list
, &netcp_modules
);
376 list_for_each_entry(netcp_device
, &netcp_devices
, device_list
) {
377 ret
= netcp_module_probe(netcp_device
, module
);
381 mutex_unlock(&netcp_modules_lock
);
385 mutex_unlock(&netcp_modules_lock
);
386 netcp_unregister_module(module
);
389 EXPORT_SYMBOL_GPL(netcp_register_module
);
391 static void netcp_release_module(struct netcp_device
*netcp_device
,
392 struct netcp_module
*module
)
394 struct netcp_inst_modpriv
*inst_modpriv
, *inst_tmp
;
395 struct netcp_intf
*netcp_intf
, *netcp_tmp
;
396 struct device
*dev
= netcp_device
->device
;
398 /* Release the module from each interface */
399 list_for_each_entry_safe(netcp_intf
, netcp_tmp
,
400 &netcp_device
->interface_head
,
402 struct netcp_intf_modpriv
*intf_modpriv
, *intf_tmp
;
404 list_for_each_entry_safe(intf_modpriv
, intf_tmp
,
405 &netcp_intf
->module_head
,
407 if (intf_modpriv
->netcp_module
== module
) {
408 module
->release(intf_modpriv
->module_priv
);
409 list_del(&intf_modpriv
->intf_list
);
410 devm_kfree(dev
, intf_modpriv
);
416 /* Remove the module from each instance */
417 list_for_each_entry_safe(inst_modpriv
, inst_tmp
,
418 &netcp_device
->modpriv_head
, inst_list
) {
419 if (inst_modpriv
->netcp_module
== module
) {
420 module
->remove(netcp_device
,
421 inst_modpriv
->module_priv
);
422 list_del(&inst_modpriv
->inst_list
);
423 devm_kfree(dev
, inst_modpriv
);
429 void netcp_unregister_module(struct netcp_module
*module
)
431 struct netcp_device
*netcp_device
;
432 struct netcp_module
*module_tmp
;
434 mutex_lock(&netcp_modules_lock
);
436 list_for_each_entry(netcp_device
, &netcp_devices
, device_list
) {
437 netcp_release_module(netcp_device
, module
);
440 /* Remove the module from the module list */
441 for_each_netcp_module(module_tmp
) {
442 if (module
== module_tmp
) {
443 list_del(&module
->module_list
);
448 mutex_unlock(&netcp_modules_lock
);
450 EXPORT_SYMBOL_GPL(netcp_unregister_module
);
452 void *netcp_module_get_intf_data(struct netcp_module
*module
,
453 struct netcp_intf
*intf
)
455 struct netcp_intf_modpriv
*intf_modpriv
;
457 list_for_each_entry(intf_modpriv
, &intf
->module_head
, intf_list
)
458 if (intf_modpriv
->netcp_module
== module
)
459 return intf_modpriv
->module_priv
;
462 EXPORT_SYMBOL_GPL(netcp_module_get_intf_data
);
464 /* Module TX and RX Hook management */
465 struct netcp_hook_list
{
466 struct list_head list
;
467 netcp_hook_rtn
*hook_rtn
;
472 int netcp_register_txhook(struct netcp_intf
*netcp_priv
, int order
,
473 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
475 struct netcp_hook_list
*entry
;
476 struct netcp_hook_list
*next
;
479 entry
= devm_kzalloc(netcp_priv
->dev
, sizeof(*entry
), GFP_KERNEL
);
483 entry
->hook_rtn
= hook_rtn
;
484 entry
->hook_data
= hook_data
;
485 entry
->order
= order
;
487 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
488 list_for_each_entry(next
, &netcp_priv
->txhook_list_head
, list
) {
489 if (next
->order
> order
)
492 __list_add(&entry
->list
, next
->list
.prev
, &next
->list
);
493 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
497 EXPORT_SYMBOL_GPL(netcp_register_txhook
);
499 int netcp_unregister_txhook(struct netcp_intf
*netcp_priv
, int order
,
500 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
502 struct netcp_hook_list
*next
, *n
;
505 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
506 list_for_each_entry_safe(next
, n
, &netcp_priv
->txhook_list_head
, list
) {
507 if ((next
->order
== order
) &&
508 (next
->hook_rtn
== hook_rtn
) &&
509 (next
->hook_data
== hook_data
)) {
510 list_del(&next
->list
);
511 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
512 devm_kfree(netcp_priv
->dev
, next
);
516 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
519 EXPORT_SYMBOL_GPL(netcp_unregister_txhook
);
521 int netcp_register_rxhook(struct netcp_intf
*netcp_priv
, int order
,
522 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
524 struct netcp_hook_list
*entry
;
525 struct netcp_hook_list
*next
;
528 entry
= devm_kzalloc(netcp_priv
->dev
, sizeof(*entry
), GFP_KERNEL
);
532 entry
->hook_rtn
= hook_rtn
;
533 entry
->hook_data
= hook_data
;
534 entry
->order
= order
;
536 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
537 list_for_each_entry(next
, &netcp_priv
->rxhook_list_head
, list
) {
538 if (next
->order
> order
)
541 __list_add(&entry
->list
, next
->list
.prev
, &next
->list
);
542 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
547 int netcp_unregister_rxhook(struct netcp_intf
*netcp_priv
, int order
,
548 netcp_hook_rtn
*hook_rtn
, void *hook_data
)
550 struct netcp_hook_list
*next
, *n
;
553 spin_lock_irqsave(&netcp_priv
->lock
, flags
);
554 list_for_each_entry_safe(next
, n
, &netcp_priv
->rxhook_list_head
, list
) {
555 if ((next
->order
== order
) &&
556 (next
->hook_rtn
== hook_rtn
) &&
557 (next
->hook_data
== hook_data
)) {
558 list_del(&next
->list
);
559 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
560 devm_kfree(netcp_priv
->dev
, next
);
564 spin_unlock_irqrestore(&netcp_priv
->lock
, flags
);
569 static void netcp_frag_free(bool is_frag
, void *ptr
)
577 static void netcp_free_rx_desc_chain(struct netcp_intf
*netcp
,
578 struct knav_dma_desc
*desc
)
580 struct knav_dma_desc
*ndesc
;
581 dma_addr_t dma_desc
, dma_buf
;
582 unsigned int buf_len
, dma_sz
= sizeof(*ndesc
);
587 get_words(&dma_desc
, 1, &desc
->next_desc
);
590 ndesc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma_desc
, dma_sz
);
591 if (unlikely(!ndesc
)) {
592 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
595 get_pkt_info(&dma_buf
, &tmp
, &dma_desc
, ndesc
);
596 get_pad_ptr(&buf_ptr
, ndesc
);
597 dma_unmap_page(netcp
->dev
, dma_buf
, PAGE_SIZE
, DMA_FROM_DEVICE
);
598 __free_page(buf_ptr
);
599 knav_pool_desc_put(netcp
->rx_pool
, desc
);
602 get_pad_info(&pad
[0], &pad
[1], &buf_len
, desc
);
603 buf_ptr
= (void *)(uintptr_t)(pad
[0] + ((u64
)pad
[1] << 32));
606 netcp_frag_free(buf_len
<= PAGE_SIZE
, buf_ptr
);
607 knav_pool_desc_put(netcp
->rx_pool
, desc
);
610 static void netcp_empty_rx_queue(struct netcp_intf
*netcp
)
612 struct knav_dma_desc
*desc
;
617 dma
= knav_queue_pop(netcp
->rx_queue
, &dma_sz
);
621 desc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma
, dma_sz
);
622 if (unlikely(!desc
)) {
623 dev_err(netcp
->ndev_dev
, "%s: failed to unmap Rx desc\n",
625 netcp
->ndev
->stats
.rx_errors
++;
628 netcp_free_rx_desc_chain(netcp
, desc
);
629 netcp
->ndev
->stats
.rx_dropped
++;
633 static int netcp_process_one_rx_packet(struct netcp_intf
*netcp
)
635 unsigned int dma_sz
, buf_len
, org_buf_len
;
636 struct knav_dma_desc
*desc
, *ndesc
;
637 unsigned int pkt_sz
= 0, accum_sz
;
638 struct netcp_hook_list
*rx_hook
;
639 dma_addr_t dma_desc
, dma_buff
;
640 struct netcp_packet p_info
;
645 dma_desc
= knav_queue_pop(netcp
->rx_queue
, &dma_sz
);
649 desc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma_desc
, dma_sz
);
650 if (unlikely(!desc
)) {
651 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
655 get_pkt_info(&dma_buff
, &buf_len
, &dma_desc
, desc
);
656 get_pad_info(&pad
[0], &pad
[1], &org_buf_len
, desc
);
657 org_buf_ptr
= (void *)(uintptr_t)(pad
[0] + ((u64
)pad
[1] << 32));
659 if (unlikely(!org_buf_ptr
)) {
660 dev_err(netcp
->ndev_dev
, "NULL bufptr in desc\n");
664 pkt_sz
&= KNAV_DMA_DESC_PKT_LEN_MASK
;
666 dma_unmap_single(netcp
->dev
, dma_buff
, buf_len
, DMA_FROM_DEVICE
);
668 /* Build a new sk_buff for the primary buffer */
669 skb
= build_skb(org_buf_ptr
, org_buf_len
);
670 if (unlikely(!skb
)) {
671 dev_err(netcp
->ndev_dev
, "build_skb() failed\n");
675 /* update data, tail and len */
676 skb_reserve(skb
, NETCP_SOP_OFFSET
);
677 __skb_put(skb
, buf_len
);
679 /* Fill in the page fragment list */
684 ndesc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma_desc
, dma_sz
);
685 if (unlikely(!ndesc
)) {
686 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
690 get_pkt_info(&dma_buff
, &buf_len
, &dma_desc
, ndesc
);
691 get_pad_ptr(&ptr
, ndesc
);
694 if (likely(dma_buff
&& buf_len
&& page
)) {
695 dma_unmap_page(netcp
->dev
, dma_buff
, PAGE_SIZE
,
698 dev_err(netcp
->ndev_dev
, "Bad Rx desc dma_buff(%pad), len(%d), page(%p)\n",
699 &dma_buff
, buf_len
, page
);
703 skb_add_rx_frag(skb
, skb_shinfo(skb
)->nr_frags
, page
,
704 offset_in_page(dma_buff
), buf_len
, PAGE_SIZE
);
707 /* Free the descriptor */
708 knav_pool_desc_put(netcp
->rx_pool
, ndesc
);
711 /* Free the primary descriptor */
712 knav_pool_desc_put(netcp
->rx_pool
, desc
);
714 /* check for packet len and warn */
715 if (unlikely(pkt_sz
!= accum_sz
))
716 dev_dbg(netcp
->ndev_dev
, "mismatch in packet size(%d) & sum of fragments(%d)\n",
719 /* Remove ethernet FCS from the packet */
720 __pskb_trim(skb
, skb
->len
- ETH_FCS_LEN
);
722 /* Call each of the RX hooks */
724 p_info
.rxtstamp_complete
= false;
725 list_for_each_entry(rx_hook
, &netcp
->rxhook_list_head
, list
) {
728 ret
= rx_hook
->hook_rtn(rx_hook
->order
, rx_hook
->hook_data
,
731 dev_err(netcp
->ndev_dev
, "RX hook %d failed: %d\n",
732 rx_hook
->order
, ret
);
733 netcp
->ndev
->stats
.rx_errors
++;
739 netcp
->ndev
->stats
.rx_packets
++;
740 netcp
->ndev
->stats
.rx_bytes
+= skb
->len
;
742 /* push skb up the stack */
743 skb
->protocol
= eth_type_trans(skb
, netcp
->ndev
);
744 netif_receive_skb(skb
);
748 netcp_free_rx_desc_chain(netcp
, desc
);
749 netcp
->ndev
->stats
.rx_errors
++;
753 static int netcp_process_rx_packets(struct netcp_intf
*netcp
,
758 for (i
= 0; (i
< budget
) && !netcp_process_one_rx_packet(netcp
); i
++)
763 /* Release descriptors and attached buffers from Rx FDQ */
764 static void netcp_free_rx_buf(struct netcp_intf
*netcp
, int fdq
)
766 struct knav_dma_desc
*desc
;
767 unsigned int buf_len
, dma_sz
;
771 /* Allocate descriptor */
772 while ((dma
= knav_queue_pop(netcp
->rx_fdq
[fdq
], &dma_sz
))) {
773 desc
= knav_pool_desc_unmap(netcp
->rx_pool
, dma
, dma_sz
);
774 if (unlikely(!desc
)) {
775 dev_err(netcp
->ndev_dev
, "failed to unmap Rx desc\n");
779 get_org_pkt_info(&dma
, &buf_len
, desc
);
780 get_pad_ptr(&buf_ptr
, desc
);
782 if (unlikely(!dma
)) {
783 dev_err(netcp
->ndev_dev
, "NULL orig_buff in desc\n");
784 knav_pool_desc_put(netcp
->rx_pool
, desc
);
788 if (unlikely(!buf_ptr
)) {
789 dev_err(netcp
->ndev_dev
, "NULL bufptr in desc\n");
790 knav_pool_desc_put(netcp
->rx_pool
, desc
);
795 dma_unmap_single(netcp
->dev
, dma
, buf_len
,
797 netcp_frag_free((buf_len
<= PAGE_SIZE
), buf_ptr
);
799 dma_unmap_page(netcp
->dev
, dma
, buf_len
,
801 __free_page(buf_ptr
);
804 knav_pool_desc_put(netcp
->rx_pool
, desc
);
808 static void netcp_rxpool_free(struct netcp_intf
*netcp
)
812 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&&
813 !IS_ERR_OR_NULL(netcp
->rx_fdq
[i
]); i
++)
814 netcp_free_rx_buf(netcp
, i
);
816 if (knav_pool_count(netcp
->rx_pool
) != netcp
->rx_pool_size
)
817 dev_err(netcp
->ndev_dev
, "Lost Rx (%d) descriptors\n",
818 netcp
->rx_pool_size
- knav_pool_count(netcp
->rx_pool
));
820 knav_pool_destroy(netcp
->rx_pool
);
821 netcp
->rx_pool
= NULL
;
824 static int netcp_allocate_rx_buf(struct netcp_intf
*netcp
, int fdq
)
826 struct knav_dma_desc
*hwdesc
;
827 unsigned int buf_len
, dma_sz
;
828 u32 desc_info
, pkt_info
;
834 /* Allocate descriptor */
835 hwdesc
= knav_pool_desc_get(netcp
->rx_pool
);
836 if (IS_ERR_OR_NULL(hwdesc
)) {
837 dev_dbg(netcp
->ndev_dev
, "out of rx pool desc\n");
841 if (likely(fdq
== 0)) {
842 unsigned int primary_buf_len
;
843 /* Allocate a primary receive queue entry */
844 buf_len
= NETCP_PACKET_SIZE
+ NETCP_SOP_OFFSET
;
845 primary_buf_len
= SKB_DATA_ALIGN(buf_len
) +
846 SKB_DATA_ALIGN(sizeof(struct skb_shared_info
));
848 bufptr
= netdev_alloc_frag(primary_buf_len
);
849 pad
[2] = primary_buf_len
;
851 if (unlikely(!bufptr
)) {
852 dev_warn_ratelimited(netcp
->ndev_dev
,
853 "Primary RX buffer alloc failed\n");
856 dma
= dma_map_single(netcp
->dev
, bufptr
, buf_len
,
858 if (unlikely(dma_mapping_error(netcp
->dev
, dma
)))
861 pad
[0] = lower_32_bits((uintptr_t)bufptr
);
862 pad
[1] = upper_32_bits((uintptr_t)bufptr
);
865 /* Allocate a secondary receive queue entry */
866 page
= alloc_page(GFP_ATOMIC
| GFP_DMA
| __GFP_COLD
);
867 if (unlikely(!page
)) {
868 dev_warn_ratelimited(netcp
->ndev_dev
, "Secondary page alloc failed\n");
872 dma
= dma_map_page(netcp
->dev
, page
, 0, buf_len
, DMA_TO_DEVICE
);
873 pad
[0] = lower_32_bits(dma
);
874 pad
[1] = upper_32_bits(dma
);
878 desc_info
= KNAV_DMA_DESC_PS_INFO_IN_DESC
;
879 desc_info
|= buf_len
& KNAV_DMA_DESC_PKT_LEN_MASK
;
880 pkt_info
= KNAV_DMA_DESC_HAS_EPIB
;
881 pkt_info
|= KNAV_DMA_NUM_PS_WORDS
<< KNAV_DMA_DESC_PSLEN_SHIFT
;
882 pkt_info
|= (netcp
->rx_queue_id
& KNAV_DMA_DESC_RETQ_MASK
) <<
883 KNAV_DMA_DESC_RETQ_SHIFT
;
884 set_org_pkt_info(dma
, buf_len
, hwdesc
);
885 set_pad_info(pad
[0], pad
[1], pad
[2], hwdesc
);
886 set_desc_info(desc_info
, pkt_info
, hwdesc
);
889 knav_pool_desc_map(netcp
->rx_pool
, hwdesc
, sizeof(*hwdesc
), &dma
,
891 knav_queue_push(netcp
->rx_fdq
[fdq
], dma
, sizeof(*hwdesc
), 0);
895 knav_pool_desc_put(netcp
->rx_pool
, hwdesc
);
899 /* Refill Rx FDQ with descriptors & attached buffers */
900 static void netcp_rxpool_refill(struct netcp_intf
*netcp
)
902 u32 fdq_deficit
[KNAV_DMA_FDQ_PER_CHAN
] = {0};
905 /* Calculate the FDQ deficit and refill */
906 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&& netcp
->rx_fdq
[i
]; i
++) {
907 fdq_deficit
[i
] = netcp
->rx_queue_depths
[i
] -
908 knav_queue_get_count(netcp
->rx_fdq
[i
]);
910 while (fdq_deficit
[i
]-- && !ret
)
911 ret
= netcp_allocate_rx_buf(netcp
, i
);
916 static int netcp_rx_poll(struct napi_struct
*napi
, int budget
)
918 struct netcp_intf
*netcp
= container_of(napi
, struct netcp_intf
,
920 unsigned int packets
;
922 packets
= netcp_process_rx_packets(netcp
, budget
);
924 netcp_rxpool_refill(netcp
);
925 if (packets
< budget
) {
926 napi_complete(&netcp
->rx_napi
);
927 knav_queue_enable_notify(netcp
->rx_queue
);
933 static void netcp_rx_notify(void *arg
)
935 struct netcp_intf
*netcp
= arg
;
937 knav_queue_disable_notify(netcp
->rx_queue
);
938 napi_schedule(&netcp
->rx_napi
);
941 static void netcp_free_tx_desc_chain(struct netcp_intf
*netcp
,
942 struct knav_dma_desc
*desc
,
943 unsigned int desc_sz
)
945 struct knav_dma_desc
*ndesc
= desc
;
946 dma_addr_t dma_desc
, dma_buf
;
947 unsigned int buf_len
;
950 get_pkt_info(&dma_buf
, &buf_len
, &dma_desc
, ndesc
);
952 if (dma_buf
&& buf_len
)
953 dma_unmap_single(netcp
->dev
, dma_buf
, buf_len
,
956 dev_warn(netcp
->ndev_dev
, "bad Tx desc buf(%pad), len(%d)\n",
959 knav_pool_desc_put(netcp
->tx_pool
, ndesc
);
962 ndesc
= knav_pool_desc_unmap(netcp
->tx_pool
, dma_desc
,
965 dev_err(netcp
->ndev_dev
, "failed to unmap Tx desc\n");
970 static int netcp_process_tx_compl_packets(struct netcp_intf
*netcp
,
973 struct knav_dma_desc
*desc
;
981 dma
= knav_queue_pop(netcp
->tx_compl_q
, &dma_sz
);
984 desc
= knav_pool_desc_unmap(netcp
->tx_pool
, dma
, dma_sz
);
985 if (unlikely(!desc
)) {
986 dev_err(netcp
->ndev_dev
, "failed to unmap Tx desc\n");
987 netcp
->ndev
->stats
.tx_errors
++;
991 get_pad_ptr(&ptr
, desc
);
993 netcp_free_tx_desc_chain(netcp
, desc
, dma_sz
);
995 dev_err(netcp
->ndev_dev
, "No skb in Tx desc\n");
996 netcp
->ndev
->stats
.tx_errors
++;
1000 if (netif_subqueue_stopped(netcp
->ndev
, skb
) &&
1001 netif_running(netcp
->ndev
) &&
1002 (knav_pool_count(netcp
->tx_pool
) >
1003 netcp
->tx_resume_threshold
)) {
1004 u16 subqueue
= skb_get_queue_mapping(skb
);
1006 netif_wake_subqueue(netcp
->ndev
, subqueue
);
1009 netcp
->ndev
->stats
.tx_packets
++;
1010 netcp
->ndev
->stats
.tx_bytes
+= skb
->len
;
1017 static int netcp_tx_poll(struct napi_struct
*napi
, int budget
)
1020 struct netcp_intf
*netcp
= container_of(napi
, struct netcp_intf
,
1023 packets
= netcp_process_tx_compl_packets(netcp
, budget
);
1024 if (packets
< budget
) {
1025 napi_complete(&netcp
->tx_napi
);
1026 knav_queue_enable_notify(netcp
->tx_compl_q
);
1032 static void netcp_tx_notify(void *arg
)
1034 struct netcp_intf
*netcp
= arg
;
1036 knav_queue_disable_notify(netcp
->tx_compl_q
);
1037 napi_schedule(&netcp
->tx_napi
);
1040 static struct knav_dma_desc
*
1041 netcp_tx_map_skb(struct sk_buff
*skb
, struct netcp_intf
*netcp
)
1043 struct knav_dma_desc
*desc
, *ndesc
, *pdesc
;
1044 unsigned int pkt_len
= skb_headlen(skb
);
1045 struct device
*dev
= netcp
->dev
;
1046 dma_addr_t dma_addr
;
1047 unsigned int dma_sz
;
1050 /* Map the linear buffer */
1051 dma_addr
= dma_map_single(dev
, skb
->data
, pkt_len
, DMA_TO_DEVICE
);
1052 if (unlikely(dma_mapping_error(dev
, dma_addr
))) {
1053 dev_err(netcp
->ndev_dev
, "Failed to map skb buffer\n");
1057 desc
= knav_pool_desc_get(netcp
->tx_pool
);
1058 if (IS_ERR_OR_NULL(desc
)) {
1059 dev_err(netcp
->ndev_dev
, "out of TX desc\n");
1060 dma_unmap_single(dev
, dma_addr
, pkt_len
, DMA_TO_DEVICE
);
1064 set_pkt_info(dma_addr
, pkt_len
, 0, desc
);
1065 if (skb_is_nonlinear(skb
)) {
1066 prefetchw(skb_shinfo(skb
));
1068 desc
->next_desc
= 0;
1074 /* Handle the case where skb is fragmented in pages */
1075 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; i
++) {
1076 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
1077 struct page
*page
= skb_frag_page(frag
);
1078 u32 page_offset
= frag
->page_offset
;
1079 u32 buf_len
= skb_frag_size(frag
);
1080 dma_addr_t desc_dma
;
1084 dma_addr
= dma_map_page(dev
, page
, page_offset
, buf_len
,
1086 if (unlikely(!dma_addr
)) {
1087 dev_err(netcp
->ndev_dev
, "Failed to map skb page\n");
1091 ndesc
= knav_pool_desc_get(netcp
->tx_pool
);
1092 if (IS_ERR_OR_NULL(ndesc
)) {
1093 dev_err(netcp
->ndev_dev
, "out of TX desc for frags\n");
1094 dma_unmap_page(dev
, dma_addr
, buf_len
, DMA_TO_DEVICE
);
1098 desc_dma
= knav_pool_desc_virt_to_dma(netcp
->tx_pool
, ndesc
);
1100 (netcp
->tx_compl_qid
& KNAV_DMA_DESC_RETQ_MASK
) <<
1101 KNAV_DMA_DESC_RETQ_SHIFT
;
1102 set_pkt_info(dma_addr
, buf_len
, 0, ndesc
);
1103 desc_dma_32
= (u32
)desc_dma
;
1104 set_words(&desc_dma_32
, 1, &pdesc
->next_desc
);
1107 knav_pool_desc_map(netcp
->tx_pool
, pdesc
,
1108 sizeof(*pdesc
), &desc_dma
, &dma_sz
);
1112 knav_pool_desc_map(netcp
->tx_pool
, pdesc
, sizeof(*pdesc
),
1113 &dma_addr
, &dma_sz
);
1115 /* frag list based linkage is not supported for now. */
1116 if (skb_shinfo(skb
)->frag_list
) {
1117 dev_err_ratelimited(netcp
->ndev_dev
, "NETIF_F_FRAGLIST not supported\n");
1122 WARN_ON(pkt_len
!= skb
->len
);
1124 pkt_len
&= KNAV_DMA_DESC_PKT_LEN_MASK
;
1125 set_words(&pkt_len
, 1, &desc
->desc_info
);
1129 netcp_free_tx_desc_chain(netcp
, desc
, sizeof(*desc
));
1133 static int netcp_tx_submit_skb(struct netcp_intf
*netcp
,
1134 struct sk_buff
*skb
,
1135 struct knav_dma_desc
*desc
)
1137 struct netcp_tx_pipe
*tx_pipe
= NULL
;
1138 struct netcp_hook_list
*tx_hook
;
1139 struct netcp_packet p_info
;
1140 unsigned int dma_sz
;
1145 p_info
.netcp
= netcp
;
1147 p_info
.tx_pipe
= NULL
;
1148 p_info
.psdata_len
= 0;
1149 p_info
.ts_context
= NULL
;
1150 p_info
.txtstamp_complete
= NULL
;
1151 p_info
.epib
= desc
->epib
;
1152 p_info
.psdata
= (u32 __force
*)desc
->psdata
;
1153 memset(p_info
.epib
, 0, KNAV_DMA_NUM_EPIB_WORDS
* sizeof(__le32
));
1155 /* Find out where to inject the packet for transmission */
1156 list_for_each_entry(tx_hook
, &netcp
->txhook_list_head
, list
) {
1157 ret
= tx_hook
->hook_rtn(tx_hook
->order
, tx_hook
->hook_data
,
1159 if (unlikely(ret
!= 0)) {
1160 dev_err(netcp
->ndev_dev
, "TX hook %d rejected the packet with reason(%d)\n",
1161 tx_hook
->order
, ret
);
1162 ret
= (ret
< 0) ? ret
: NETDEV_TX_OK
;
1167 /* Make sure some TX hook claimed the packet */
1168 tx_pipe
= p_info
.tx_pipe
;
1170 dev_err(netcp
->ndev_dev
, "No TX hook claimed the packet!\n");
1175 /* update descriptor */
1176 if (p_info
.psdata_len
) {
1177 /* psdata points to both native-endian and device-endian data */
1178 __le32
*psdata
= (void __force
*)p_info
.psdata
;
1180 memmove(p_info
.psdata
, p_info
.psdata
+ p_info
.psdata_len
,
1182 set_words(p_info
.psdata
, p_info
.psdata_len
, psdata
);
1183 tmp
|= (p_info
.psdata_len
& KNAV_DMA_DESC_PSLEN_MASK
) <<
1184 KNAV_DMA_DESC_PSLEN_SHIFT
;
1187 tmp
|= KNAV_DMA_DESC_HAS_EPIB
|
1188 ((netcp
->tx_compl_qid
& KNAV_DMA_DESC_RETQ_MASK
) <<
1189 KNAV_DMA_DESC_RETQ_SHIFT
);
1191 if (!(tx_pipe
->flags
& SWITCH_TO_PORT_IN_TAGINFO
)) {
1192 tmp
|= ((tx_pipe
->switch_to_port
& KNAV_DMA_DESC_PSFLAG_MASK
) <<
1193 KNAV_DMA_DESC_PSFLAG_SHIFT
);
1196 set_words(&tmp
, 1, &desc
->packet_info
);
1197 tmp
= lower_32_bits((uintptr_t)&skb
);
1198 set_words(&tmp
, 1, &desc
->pad
[0]);
1199 tmp
= upper_32_bits((uintptr_t)&skb
);
1200 set_words(&tmp
, 1, &desc
->pad
[1]);
1202 if (tx_pipe
->flags
& SWITCH_TO_PORT_IN_TAGINFO
) {
1203 tmp
= tx_pipe
->switch_to_port
;
1204 set_words(&tmp
, 1, &desc
->tag_info
);
1207 /* submit packet descriptor */
1208 ret
= knav_pool_desc_map(netcp
->tx_pool
, desc
, sizeof(*desc
), &dma
,
1210 if (unlikely(ret
)) {
1211 dev_err(netcp
->ndev_dev
, "%s() failed to map desc\n", __func__
);
1215 skb_tx_timestamp(skb
);
1216 knav_queue_push(tx_pipe
->dma_queue
, dma
, dma_sz
, 0);
1222 /* Submit the packet */
1223 static int netcp_ndo_start_xmit(struct sk_buff
*skb
, struct net_device
*ndev
)
1225 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1226 int subqueue
= skb_get_queue_mapping(skb
);
1227 struct knav_dma_desc
*desc
;
1228 int desc_count
, ret
= 0;
1230 if (unlikely(skb
->len
<= 0)) {
1232 return NETDEV_TX_OK
;
1235 if (unlikely(skb
->len
< NETCP_MIN_PACKET_SIZE
)) {
1236 ret
= skb_padto(skb
, NETCP_MIN_PACKET_SIZE
);
1238 /* If we get here, the skb has already been dropped */
1239 dev_warn(netcp
->ndev_dev
, "padding failed (%d), packet dropped\n",
1241 ndev
->stats
.tx_dropped
++;
1244 skb
->len
= NETCP_MIN_PACKET_SIZE
;
1247 desc
= netcp_tx_map_skb(skb
, netcp
);
1248 if (unlikely(!desc
)) {
1249 netif_stop_subqueue(ndev
, subqueue
);
1254 ret
= netcp_tx_submit_skb(netcp
, skb
, desc
);
1258 ndev
->trans_start
= jiffies
;
1260 /* Check Tx pool count & stop subqueue if needed */
1261 desc_count
= knav_pool_count(netcp
->tx_pool
);
1262 if (desc_count
< netcp
->tx_pause_threshold
) {
1263 dev_dbg(netcp
->ndev_dev
, "pausing tx, count(%d)\n", desc_count
);
1264 netif_stop_subqueue(ndev
, subqueue
);
1266 return NETDEV_TX_OK
;
1269 ndev
->stats
.tx_dropped
++;
1271 netcp_free_tx_desc_chain(netcp
, desc
, sizeof(*desc
));
1276 int netcp_txpipe_close(struct netcp_tx_pipe
*tx_pipe
)
1278 if (tx_pipe
->dma_channel
) {
1279 knav_dma_close_channel(tx_pipe
->dma_channel
);
1280 tx_pipe
->dma_channel
= NULL
;
1284 EXPORT_SYMBOL_GPL(netcp_txpipe_close
);
1286 int netcp_txpipe_open(struct netcp_tx_pipe
*tx_pipe
)
1288 struct device
*dev
= tx_pipe
->netcp_device
->device
;
1289 struct knav_dma_cfg config
;
1293 memset(&config
, 0, sizeof(config
));
1294 config
.direction
= DMA_MEM_TO_DEV
;
1295 config
.u
.tx
.filt_einfo
= false;
1296 config
.u
.tx
.filt_pswords
= false;
1297 config
.u
.tx
.priority
= DMA_PRIO_MED_L
;
1299 tx_pipe
->dma_channel
= knav_dma_open_channel(dev
,
1300 tx_pipe
->dma_chan_name
, &config
);
1301 if (IS_ERR_OR_NULL(tx_pipe
->dma_channel
)) {
1302 dev_err(dev
, "failed opening tx chan(%s)\n",
1303 tx_pipe
->dma_chan_name
);
1307 snprintf(name
, sizeof(name
), "tx-pipe-%s", dev_name(dev
));
1308 tx_pipe
->dma_queue
= knav_queue_open(name
, tx_pipe
->dma_queue_id
,
1310 if (IS_ERR(tx_pipe
->dma_queue
)) {
1311 dev_err(dev
, "Could not open DMA queue for channel \"%s\": %d\n",
1313 ret
= PTR_ERR(tx_pipe
->dma_queue
);
1317 dev_dbg(dev
, "opened tx pipe %s\n", name
);
1321 if (!IS_ERR_OR_NULL(tx_pipe
->dma_channel
))
1322 knav_dma_close_channel(tx_pipe
->dma_channel
);
1323 tx_pipe
->dma_channel
= NULL
;
1326 EXPORT_SYMBOL_GPL(netcp_txpipe_open
);
1328 int netcp_txpipe_init(struct netcp_tx_pipe
*tx_pipe
,
1329 struct netcp_device
*netcp_device
,
1330 const char *dma_chan_name
, unsigned int dma_queue_id
)
1332 memset(tx_pipe
, 0, sizeof(*tx_pipe
));
1333 tx_pipe
->netcp_device
= netcp_device
;
1334 tx_pipe
->dma_chan_name
= dma_chan_name
;
1335 tx_pipe
->dma_queue_id
= dma_queue_id
;
1338 EXPORT_SYMBOL_GPL(netcp_txpipe_init
);
1340 static struct netcp_addr
*netcp_addr_find(struct netcp_intf
*netcp
,
1342 enum netcp_addr_type type
)
1344 struct netcp_addr
*naddr
;
1346 list_for_each_entry(naddr
, &netcp
->addr_list
, node
) {
1347 if (naddr
->type
!= type
)
1349 if (addr
&& memcmp(addr
, naddr
->addr
, ETH_ALEN
))
1357 static struct netcp_addr
*netcp_addr_add(struct netcp_intf
*netcp
,
1359 enum netcp_addr_type type
)
1361 struct netcp_addr
*naddr
;
1363 naddr
= devm_kmalloc(netcp
->dev
, sizeof(*naddr
), GFP_ATOMIC
);
1369 naddr
->netcp
= netcp
;
1371 ether_addr_copy(naddr
->addr
, addr
);
1373 eth_zero_addr(naddr
->addr
);
1374 list_add_tail(&naddr
->node
, &netcp
->addr_list
);
1379 static void netcp_addr_del(struct netcp_intf
*netcp
, struct netcp_addr
*naddr
)
1381 list_del(&naddr
->node
);
1382 devm_kfree(netcp
->dev
, naddr
);
1385 static void netcp_addr_clear_mark(struct netcp_intf
*netcp
)
1387 struct netcp_addr
*naddr
;
1389 list_for_each_entry(naddr
, &netcp
->addr_list
, node
)
1393 static void netcp_addr_add_mark(struct netcp_intf
*netcp
, const u8
*addr
,
1394 enum netcp_addr_type type
)
1396 struct netcp_addr
*naddr
;
1398 naddr
= netcp_addr_find(netcp
, addr
, type
);
1400 naddr
->flags
|= ADDR_VALID
;
1404 naddr
= netcp_addr_add(netcp
, addr
, type
);
1405 if (!WARN_ON(!naddr
))
1406 naddr
->flags
|= ADDR_NEW
;
1409 static void netcp_addr_sweep_del(struct netcp_intf
*netcp
)
1411 struct netcp_addr
*naddr
, *tmp
;
1412 struct netcp_intf_modpriv
*priv
;
1413 struct netcp_module
*module
;
1416 list_for_each_entry_safe(naddr
, tmp
, &netcp
->addr_list
, node
) {
1417 if (naddr
->flags
& (ADDR_VALID
| ADDR_NEW
))
1419 dev_dbg(netcp
->ndev_dev
, "deleting address %pM, type %x\n",
1420 naddr
->addr
, naddr
->type
);
1421 for_each_module(netcp
, priv
) {
1422 module
= priv
->netcp_module
;
1423 if (!module
->del_addr
)
1425 error
= module
->del_addr(priv
->module_priv
,
1429 netcp_addr_del(netcp
, naddr
);
1433 static void netcp_addr_sweep_add(struct netcp_intf
*netcp
)
1435 struct netcp_addr
*naddr
, *tmp
;
1436 struct netcp_intf_modpriv
*priv
;
1437 struct netcp_module
*module
;
1440 list_for_each_entry_safe(naddr
, tmp
, &netcp
->addr_list
, node
) {
1441 if (!(naddr
->flags
& ADDR_NEW
))
1443 dev_dbg(netcp
->ndev_dev
, "adding address %pM, type %x\n",
1444 naddr
->addr
, naddr
->type
);
1446 for_each_module(netcp
, priv
) {
1447 module
= priv
->netcp_module
;
1448 if (!module
->add_addr
)
1450 error
= module
->add_addr(priv
->module_priv
, naddr
);
1456 static void netcp_set_rx_mode(struct net_device
*ndev
)
1458 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1459 struct netdev_hw_addr
*ndev_addr
;
1462 promisc
= (ndev
->flags
& IFF_PROMISC
||
1463 ndev
->flags
& IFF_ALLMULTI
||
1464 netdev_mc_count(ndev
) > NETCP_MAX_MCAST_ADDR
);
1466 spin_lock(&netcp
->lock
);
1467 /* first clear all marks */
1468 netcp_addr_clear_mark(netcp
);
1470 /* next add new entries, mark existing ones */
1471 netcp_addr_add_mark(netcp
, ndev
->broadcast
, ADDR_BCAST
);
1472 for_each_dev_addr(ndev
, ndev_addr
)
1473 netcp_addr_add_mark(netcp
, ndev_addr
->addr
, ADDR_DEV
);
1474 netdev_for_each_uc_addr(ndev_addr
, ndev
)
1475 netcp_addr_add_mark(netcp
, ndev_addr
->addr
, ADDR_UCAST
);
1476 netdev_for_each_mc_addr(ndev_addr
, ndev
)
1477 netcp_addr_add_mark(netcp
, ndev_addr
->addr
, ADDR_MCAST
);
1480 netcp_addr_add_mark(netcp
, NULL
, ADDR_ANY
);
1482 /* finally sweep and callout into modules */
1483 netcp_addr_sweep_del(netcp
);
1484 netcp_addr_sweep_add(netcp
);
1485 spin_unlock(&netcp
->lock
);
1488 static void netcp_free_navigator_resources(struct netcp_intf
*netcp
)
1492 if (netcp
->rx_channel
) {
1493 knav_dma_close_channel(netcp
->rx_channel
);
1494 netcp
->rx_channel
= NULL
;
1497 if (!IS_ERR_OR_NULL(netcp
->rx_pool
))
1498 netcp_rxpool_free(netcp
);
1500 if (!IS_ERR_OR_NULL(netcp
->rx_queue
)) {
1501 knav_queue_close(netcp
->rx_queue
);
1502 netcp
->rx_queue
= NULL
;
1505 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&&
1506 !IS_ERR_OR_NULL(netcp
->rx_fdq
[i
]) ; ++i
) {
1507 knav_queue_close(netcp
->rx_fdq
[i
]);
1508 netcp
->rx_fdq
[i
] = NULL
;
1511 if (!IS_ERR_OR_NULL(netcp
->tx_compl_q
)) {
1512 knav_queue_close(netcp
->tx_compl_q
);
1513 netcp
->tx_compl_q
= NULL
;
1516 if (!IS_ERR_OR_NULL(netcp
->tx_pool
)) {
1517 knav_pool_destroy(netcp
->tx_pool
);
1518 netcp
->tx_pool
= NULL
;
1522 static int netcp_setup_navigator_resources(struct net_device
*ndev
)
1524 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1525 struct knav_queue_notify_config notify_cfg
;
1526 struct knav_dma_cfg config
;
1532 /* Create Rx/Tx descriptor pools */
1533 snprintf(name
, sizeof(name
), "rx-pool-%s", ndev
->name
);
1534 netcp
->rx_pool
= knav_pool_create(name
, netcp
->rx_pool_size
,
1535 netcp
->rx_pool_region_id
);
1536 if (IS_ERR_OR_NULL(netcp
->rx_pool
)) {
1537 dev_err(netcp
->ndev_dev
, "Couldn't create rx pool\n");
1538 ret
= PTR_ERR(netcp
->rx_pool
);
1542 snprintf(name
, sizeof(name
), "tx-pool-%s", ndev
->name
);
1543 netcp
->tx_pool
= knav_pool_create(name
, netcp
->tx_pool_size
,
1544 netcp
->tx_pool_region_id
);
1545 if (IS_ERR_OR_NULL(netcp
->tx_pool
)) {
1546 dev_err(netcp
->ndev_dev
, "Couldn't create tx pool\n");
1547 ret
= PTR_ERR(netcp
->tx_pool
);
1551 /* open Tx completion queue */
1552 snprintf(name
, sizeof(name
), "tx-compl-%s", ndev
->name
);
1553 netcp
->tx_compl_q
= knav_queue_open(name
, netcp
->tx_compl_qid
, 0);
1554 if (IS_ERR_OR_NULL(netcp
->tx_compl_q
)) {
1555 ret
= PTR_ERR(netcp
->tx_compl_q
);
1558 netcp
->tx_compl_qid
= knav_queue_get_id(netcp
->tx_compl_q
);
1560 /* Set notification for Tx completion */
1561 notify_cfg
.fn
= netcp_tx_notify
;
1562 notify_cfg
.fn_arg
= netcp
;
1563 ret
= knav_queue_device_control(netcp
->tx_compl_q
,
1564 KNAV_QUEUE_SET_NOTIFIER
,
1565 (unsigned long)¬ify_cfg
);
1569 knav_queue_disable_notify(netcp
->tx_compl_q
);
1571 /* open Rx completion queue */
1572 snprintf(name
, sizeof(name
), "rx-compl-%s", ndev
->name
);
1573 netcp
->rx_queue
= knav_queue_open(name
, netcp
->rx_queue_id
, 0);
1574 if (IS_ERR_OR_NULL(netcp
->rx_queue
)) {
1575 ret
= PTR_ERR(netcp
->rx_queue
);
1578 netcp
->rx_queue_id
= knav_queue_get_id(netcp
->rx_queue
);
1580 /* Set notification for Rx completion */
1581 notify_cfg
.fn
= netcp_rx_notify
;
1582 notify_cfg
.fn_arg
= netcp
;
1583 ret
= knav_queue_device_control(netcp
->rx_queue
,
1584 KNAV_QUEUE_SET_NOTIFIER
,
1585 (unsigned long)¬ify_cfg
);
1589 knav_queue_disable_notify(netcp
->rx_queue
);
1592 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
&& netcp
->rx_queue_depths
[i
];
1594 snprintf(name
, sizeof(name
), "rx-fdq-%s-%d", ndev
->name
, i
);
1595 netcp
->rx_fdq
[i
] = knav_queue_open(name
, KNAV_QUEUE_GP
, 0);
1596 if (IS_ERR_OR_NULL(netcp
->rx_fdq
[i
])) {
1597 ret
= PTR_ERR(netcp
->rx_fdq
[i
]);
1602 memset(&config
, 0, sizeof(config
));
1603 config
.direction
= DMA_DEV_TO_MEM
;
1604 config
.u
.rx
.einfo_present
= true;
1605 config
.u
.rx
.psinfo_present
= true;
1606 config
.u
.rx
.err_mode
= DMA_DROP
;
1607 config
.u
.rx
.desc_type
= DMA_DESC_HOST
;
1608 config
.u
.rx
.psinfo_at_sop
= false;
1609 config
.u
.rx
.sop_offset
= NETCP_SOP_OFFSET
;
1610 config
.u
.rx
.dst_q
= netcp
->rx_queue_id
;
1611 config
.u
.rx
.thresh
= DMA_THRESH_NONE
;
1613 for (i
= 0; i
< KNAV_DMA_FDQ_PER_CHAN
; ++i
) {
1614 if (netcp
->rx_fdq
[i
])
1615 last_fdq
= knav_queue_get_id(netcp
->rx_fdq
[i
]);
1616 config
.u
.rx
.fdq
[i
] = last_fdq
;
1619 netcp
->rx_channel
= knav_dma_open_channel(netcp
->netcp_device
->device
,
1620 netcp
->dma_chan_name
, &config
);
1621 if (IS_ERR_OR_NULL(netcp
->rx_channel
)) {
1622 dev_err(netcp
->ndev_dev
, "failed opening rx chan(%s\n",
1623 netcp
->dma_chan_name
);
1627 dev_dbg(netcp
->ndev_dev
, "opened RX channel: %p\n", netcp
->rx_channel
);
1631 netcp_free_navigator_resources(netcp
);
1635 /* Open the device */
1636 static int netcp_ndo_open(struct net_device
*ndev
)
1638 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1639 struct netcp_intf_modpriv
*intf_modpriv
;
1640 struct netcp_module
*module
;
1643 netif_carrier_off(ndev
);
1644 ret
= netcp_setup_navigator_resources(ndev
);
1646 dev_err(netcp
->ndev_dev
, "Failed to setup navigator resources\n");
1650 for_each_module(netcp
, intf_modpriv
) {
1651 module
= intf_modpriv
->netcp_module
;
1653 ret
= module
->open(intf_modpriv
->module_priv
, ndev
);
1655 dev_err(netcp
->ndev_dev
, "module open failed\n");
1661 napi_enable(&netcp
->rx_napi
);
1662 napi_enable(&netcp
->tx_napi
);
1663 knav_queue_enable_notify(netcp
->tx_compl_q
);
1664 knav_queue_enable_notify(netcp
->rx_queue
);
1665 netcp_rxpool_refill(netcp
);
1666 netif_tx_wake_all_queues(ndev
);
1667 dev_dbg(netcp
->ndev_dev
, "netcp device %s opened\n", ndev
->name
);
1671 for_each_module(netcp
, intf_modpriv
) {
1672 module
= intf_modpriv
->netcp_module
;
1674 module
->close(intf_modpriv
->module_priv
, ndev
);
1678 netcp_free_navigator_resources(netcp
);
1682 /* Close the device */
1683 static int netcp_ndo_stop(struct net_device
*ndev
)
1685 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1686 struct netcp_intf_modpriv
*intf_modpriv
;
1687 struct netcp_module
*module
;
1690 netif_tx_stop_all_queues(ndev
);
1691 netif_carrier_off(ndev
);
1692 netcp_addr_clear_mark(netcp
);
1693 netcp_addr_sweep_del(netcp
);
1694 knav_queue_disable_notify(netcp
->rx_queue
);
1695 knav_queue_disable_notify(netcp
->tx_compl_q
);
1696 napi_disable(&netcp
->rx_napi
);
1697 napi_disable(&netcp
->tx_napi
);
1699 for_each_module(netcp
, intf_modpriv
) {
1700 module
= intf_modpriv
->netcp_module
;
1701 if (module
->close
) {
1702 err
= module
->close(intf_modpriv
->module_priv
, ndev
);
1704 dev_err(netcp
->ndev_dev
, "Close failed\n");
1708 /* Recycle Rx descriptors from completion queue */
1709 netcp_empty_rx_queue(netcp
);
1711 /* Recycle Tx descriptors from completion queue */
1712 netcp_process_tx_compl_packets(netcp
, netcp
->tx_pool_size
);
1714 if (knav_pool_count(netcp
->tx_pool
) != netcp
->tx_pool_size
)
1715 dev_err(netcp
->ndev_dev
, "Lost (%d) Tx descs\n",
1716 netcp
->tx_pool_size
- knav_pool_count(netcp
->tx_pool
));
1718 netcp_free_navigator_resources(netcp
);
1719 dev_dbg(netcp
->ndev_dev
, "netcp device %s stopped\n", ndev
->name
);
1723 static int netcp_ndo_ioctl(struct net_device
*ndev
,
1724 struct ifreq
*req
, int cmd
)
1726 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1727 struct netcp_intf_modpriv
*intf_modpriv
;
1728 struct netcp_module
*module
;
1729 int ret
= -1, err
= -EOPNOTSUPP
;
1731 if (!netif_running(ndev
))
1734 for_each_module(netcp
, intf_modpriv
) {
1735 module
= intf_modpriv
->netcp_module
;
1739 err
= module
->ioctl(intf_modpriv
->module_priv
, req
, cmd
);
1740 if ((err
< 0) && (err
!= -EOPNOTSUPP
)) {
1749 return (ret
== 0) ? 0 : err
;
1752 static int netcp_ndo_change_mtu(struct net_device
*ndev
, int new_mtu
)
1754 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1756 /* MTU < 68 is an error for IPv4 traffic */
1757 if ((new_mtu
< 68) ||
1758 (new_mtu
> (NETCP_MAX_FRAME_SIZE
- ETH_HLEN
- ETH_FCS_LEN
))) {
1759 dev_err(netcp
->ndev_dev
, "Invalid mtu size = %d\n", new_mtu
);
1763 ndev
->mtu
= new_mtu
;
1767 static void netcp_ndo_tx_timeout(struct net_device
*ndev
)
1769 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1770 unsigned int descs
= knav_pool_count(netcp
->tx_pool
);
1772 dev_err(netcp
->ndev_dev
, "transmit timed out tx descs(%d)\n", descs
);
1773 netcp_process_tx_compl_packets(netcp
, netcp
->tx_pool_size
);
1774 ndev
->trans_start
= jiffies
;
1775 netif_tx_wake_all_queues(ndev
);
1778 static int netcp_rx_add_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
;
1783 unsigned long flags
;
1786 dev_dbg(netcp
->ndev_dev
, "adding rx vlan id: %d\n", vid
);
1788 spin_lock_irqsave(&netcp
->lock
, flags
);
1789 for_each_module(netcp
, intf_modpriv
) {
1790 module
= intf_modpriv
->netcp_module
;
1791 if ((module
->add_vid
) && (vid
!= 0)) {
1792 err
= module
->add_vid(intf_modpriv
->module_priv
, vid
);
1794 dev_err(netcp
->ndev_dev
, "Could not add vlan id = %d\n",
1800 spin_unlock_irqrestore(&netcp
->lock
, flags
);
1805 static int netcp_rx_kill_vid(struct net_device
*ndev
, __be16 proto
, u16 vid
)
1807 struct netcp_intf
*netcp
= netdev_priv(ndev
);
1808 struct netcp_intf_modpriv
*intf_modpriv
;
1809 struct netcp_module
*module
;
1810 unsigned long flags
;
1813 dev_dbg(netcp
->ndev_dev
, "removing rx vlan id: %d\n", vid
);
1815 spin_lock_irqsave(&netcp
->lock
, flags
);
1816 for_each_module(netcp
, intf_modpriv
) {
1817 module
= intf_modpriv
->netcp_module
;
1818 if (module
->del_vid
) {
1819 err
= module
->del_vid(intf_modpriv
->module_priv
, vid
);
1821 dev_err(netcp
->ndev_dev
, "Could not delete vlan id = %d\n",
1827 spin_unlock_irqrestore(&netcp
->lock
, flags
);
1831 static u16
netcp_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
1833 select_queue_fallback_t fallback
)
1838 static int netcp_setup_tc(struct net_device
*dev
, u8 num_tc
)
1842 /* setup tc must be called under rtnl lock */
1845 /* Sanity-check the number of traffic classes requested */
1846 if ((dev
->real_num_tx_queues
<= 1) ||
1847 (dev
->real_num_tx_queues
< num_tc
))
1850 /* Configure traffic class to queue mappings */
1852 netdev_set_num_tc(dev
, num_tc
);
1853 for (i
= 0; i
< num_tc
; i
++)
1854 netdev_set_tc_queue(dev
, i
, 1, i
);
1856 netdev_reset_tc(dev
);
1862 static const struct net_device_ops netcp_netdev_ops
= {
1863 .ndo_open
= netcp_ndo_open
,
1864 .ndo_stop
= netcp_ndo_stop
,
1865 .ndo_start_xmit
= netcp_ndo_start_xmit
,
1866 .ndo_set_rx_mode
= netcp_set_rx_mode
,
1867 .ndo_do_ioctl
= netcp_ndo_ioctl
,
1868 .ndo_change_mtu
= netcp_ndo_change_mtu
,
1869 .ndo_set_mac_address
= eth_mac_addr
,
1870 .ndo_validate_addr
= eth_validate_addr
,
1871 .ndo_vlan_rx_add_vid
= netcp_rx_add_vid
,
1872 .ndo_vlan_rx_kill_vid
= netcp_rx_kill_vid
,
1873 .ndo_tx_timeout
= netcp_ndo_tx_timeout
,
1874 .ndo_select_queue
= netcp_select_queue
,
1875 .ndo_setup_tc
= netcp_setup_tc
,
1878 static int netcp_create_interface(struct netcp_device
*netcp_device
,
1879 struct device_node
*node_interface
)
1881 struct device
*dev
= netcp_device
->device
;
1882 struct device_node
*node
= dev
->of_node
;
1883 struct netcp_intf
*netcp
;
1884 struct net_device
*ndev
;
1885 resource_size_t size
;
1886 struct resource res
;
1887 void __iomem
*efuse
= NULL
;
1889 const void *mac_addr
;
1890 u8 efuse_mac_addr
[6];
1894 ndev
= alloc_etherdev_mqs(sizeof(*netcp
), 1, 1);
1896 dev_err(dev
, "Error allocating netdev\n");
1900 ndev
->features
|= NETIF_F_SG
;
1901 ndev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
1902 ndev
->hw_features
= ndev
->features
;
1903 ndev
->vlan_features
|= NETIF_F_SG
;
1905 netcp
= netdev_priv(ndev
);
1906 spin_lock_init(&netcp
->lock
);
1907 INIT_LIST_HEAD(&netcp
->module_head
);
1908 INIT_LIST_HEAD(&netcp
->txhook_list_head
);
1909 INIT_LIST_HEAD(&netcp
->rxhook_list_head
);
1910 INIT_LIST_HEAD(&netcp
->addr_list
);
1911 netcp
->netcp_device
= netcp_device
;
1912 netcp
->dev
= netcp_device
->device
;
1914 netcp
->ndev_dev
= &ndev
->dev
;
1915 netcp
->msg_enable
= netif_msg_init(netcp_debug_level
, NETCP_DEBUG
);
1916 netcp
->tx_pause_threshold
= MAX_SKB_FRAGS
;
1917 netcp
->tx_resume_threshold
= netcp
->tx_pause_threshold
;
1918 netcp
->node_interface
= node_interface
;
1920 ret
= of_property_read_u32(node_interface
, "efuse-mac", &efuse_mac
);
1922 if (of_address_to_resource(node
, NETCP_EFUSE_REG_INDEX
, &res
)) {
1923 dev_err(dev
, "could not find efuse-mac reg resource\n");
1927 size
= resource_size(&res
);
1929 if (!devm_request_mem_region(dev
, res
.start
, size
,
1931 dev_err(dev
, "could not reserve resource\n");
1936 efuse
= devm_ioremap_nocache(dev
, res
.start
, size
);
1938 dev_err(dev
, "could not map resource\n");
1939 devm_release_mem_region(dev
, res
.start
, size
);
1944 emac_arch_get_mac_addr(efuse_mac_addr
, efuse
, efuse_mac
);
1945 if (is_valid_ether_addr(efuse_mac_addr
))
1946 ether_addr_copy(ndev
->dev_addr
, efuse_mac_addr
);
1948 random_ether_addr(ndev
->dev_addr
);
1950 devm_iounmap(dev
, efuse
);
1951 devm_release_mem_region(dev
, res
.start
, size
);
1953 mac_addr
= of_get_mac_address(node_interface
);
1955 ether_addr_copy(ndev
->dev_addr
, mac_addr
);
1957 random_ether_addr(ndev
->dev_addr
);
1960 ret
= of_property_read_string(node_interface
, "rx-channel",
1961 &netcp
->dma_chan_name
);
1963 dev_err(dev
, "missing \"rx-channel\" parameter\n");
1968 ret
= of_property_read_u32(node_interface
, "rx-queue",
1969 &netcp
->rx_queue_id
);
1971 dev_warn(dev
, "missing \"rx-queue\" parameter\n");
1972 netcp
->rx_queue_id
= KNAV_QUEUE_QPEND
;
1975 ret
= of_property_read_u32_array(node_interface
, "rx-queue-depth",
1976 netcp
->rx_queue_depths
,
1977 KNAV_DMA_FDQ_PER_CHAN
);
1979 dev_err(dev
, "missing \"rx-queue-depth\" parameter\n");
1980 netcp
->rx_queue_depths
[0] = 128;
1983 ret
= of_property_read_u32_array(node_interface
, "rx-pool", temp
, 2);
1985 dev_err(dev
, "missing \"rx-pool\" parameter\n");
1989 netcp
->rx_pool_size
= temp
[0];
1990 netcp
->rx_pool_region_id
= temp
[1];
1992 ret
= of_property_read_u32_array(node_interface
, "tx-pool", temp
, 2);
1994 dev_err(dev
, "missing \"tx-pool\" parameter\n");
1998 netcp
->tx_pool_size
= temp
[0];
1999 netcp
->tx_pool_region_id
= temp
[1];
2001 if (netcp
->tx_pool_size
< MAX_SKB_FRAGS
) {
2002 dev_err(dev
, "tx-pool size too small, must be atleast(%ld)\n",
2008 ret
= of_property_read_u32(node_interface
, "tx-completion-queue",
2009 &netcp
->tx_compl_qid
);
2011 dev_warn(dev
, "missing \"tx-completion-queue\" parameter\n");
2012 netcp
->tx_compl_qid
= KNAV_QUEUE_QPEND
;
2016 netif_napi_add(ndev
, &netcp
->rx_napi
, netcp_rx_poll
, NETCP_NAPI_WEIGHT
);
2017 netif_tx_napi_add(ndev
, &netcp
->tx_napi
, netcp_tx_poll
, NETCP_NAPI_WEIGHT
);
2019 /* Register the network device */
2021 ndev
->watchdog_timeo
= NETCP_TX_TIMEOUT
;
2022 ndev
->netdev_ops
= &netcp_netdev_ops
;
2023 SET_NETDEV_DEV(ndev
, dev
);
2025 list_add_tail(&netcp
->interface_list
, &netcp_device
->interface_head
);
2033 static void netcp_delete_interface(struct netcp_device
*netcp_device
,
2034 struct net_device
*ndev
)
2036 struct netcp_intf_modpriv
*intf_modpriv
, *tmp
;
2037 struct netcp_intf
*netcp
= netdev_priv(ndev
);
2038 struct netcp_module
*module
;
2040 dev_dbg(netcp_device
->device
, "Removing interface \"%s\"\n",
2043 /* Notify each of the modules that the interface is going away */
2044 list_for_each_entry_safe(intf_modpriv
, tmp
, &netcp
->module_head
,
2046 module
= intf_modpriv
->netcp_module
;
2047 dev_dbg(netcp_device
->device
, "Releasing module \"%s\"\n",
2049 if (module
->release
)
2050 module
->release(intf_modpriv
->module_priv
);
2051 list_del(&intf_modpriv
->intf_list
);
2052 kfree(intf_modpriv
);
2054 WARN(!list_empty(&netcp
->module_head
), "%s interface module list is not empty!\n",
2057 list_del(&netcp
->interface_list
);
2059 of_node_put(netcp
->node_interface
);
2060 unregister_netdev(ndev
);
2061 netif_napi_del(&netcp
->rx_napi
);
2065 static int netcp_probe(struct platform_device
*pdev
)
2067 struct device_node
*node
= pdev
->dev
.of_node
;
2068 struct netcp_intf
*netcp_intf
, *netcp_tmp
;
2069 struct device_node
*child
, *interfaces
;
2070 struct netcp_device
*netcp_device
;
2071 struct device
*dev
= &pdev
->dev
;
2075 dev_err(dev
, "could not find device info\n");
2079 /* Allocate a new NETCP device instance */
2080 netcp_device
= devm_kzalloc(dev
, sizeof(*netcp_device
), GFP_KERNEL
);
2084 pm_runtime_enable(&pdev
->dev
);
2085 ret
= pm_runtime_get_sync(&pdev
->dev
);
2087 dev_err(dev
, "Failed to enable NETCP power-domain\n");
2088 pm_runtime_disable(&pdev
->dev
);
2092 /* Initialize the NETCP device instance */
2093 INIT_LIST_HEAD(&netcp_device
->interface_head
);
2094 INIT_LIST_HEAD(&netcp_device
->modpriv_head
);
2095 netcp_device
->device
= dev
;
2096 platform_set_drvdata(pdev
, netcp_device
);
2098 /* create interfaces */
2099 interfaces
= of_get_child_by_name(node
, "netcp-interfaces");
2101 dev_err(dev
, "could not find netcp-interfaces node\n");
2106 for_each_available_child_of_node(interfaces
, child
) {
2107 ret
= netcp_create_interface(netcp_device
, child
);
2109 dev_err(dev
, "could not create interface(%s)\n",
2111 goto probe_quit_interface
;
2115 /* Add the device instance to the list */
2116 list_add_tail(&netcp_device
->device_list
, &netcp_devices
);
2120 probe_quit_interface
:
2121 list_for_each_entry_safe(netcp_intf
, netcp_tmp
,
2122 &netcp_device
->interface_head
,
2124 netcp_delete_interface(netcp_device
, netcp_intf
->ndev
);
2128 pm_runtime_put_sync(&pdev
->dev
);
2129 pm_runtime_disable(&pdev
->dev
);
2130 platform_set_drvdata(pdev
, NULL
);
2134 static int netcp_remove(struct platform_device
*pdev
)
2136 struct netcp_device
*netcp_device
= platform_get_drvdata(pdev
);
2137 struct netcp_intf
*netcp_intf
, *netcp_tmp
;
2138 struct netcp_inst_modpriv
*inst_modpriv
, *tmp
;
2139 struct netcp_module
*module
;
2141 list_for_each_entry_safe(inst_modpriv
, tmp
, &netcp_device
->modpriv_head
,
2143 module
= inst_modpriv
->netcp_module
;
2144 dev_dbg(&pdev
->dev
, "Removing module \"%s\"\n", module
->name
);
2145 module
->remove(netcp_device
, inst_modpriv
->module_priv
);
2146 list_del(&inst_modpriv
->inst_list
);
2147 kfree(inst_modpriv
);
2150 /* now that all modules are removed, clean up the interfaces */
2151 list_for_each_entry_safe(netcp_intf
, netcp_tmp
,
2152 &netcp_device
->interface_head
,
2154 netcp_delete_interface(netcp_device
, netcp_intf
->ndev
);
2157 WARN(!list_empty(&netcp_device
->interface_head
),
2158 "%s interface list not empty!\n", pdev
->name
);
2160 pm_runtime_put_sync(&pdev
->dev
);
2161 pm_runtime_disable(&pdev
->dev
);
2162 platform_set_drvdata(pdev
, NULL
);
2166 static const struct of_device_id of_match
[] = {
2167 { .compatible
= "ti,netcp-1.0", },
2170 MODULE_DEVICE_TABLE(of
, of_match
);
2172 static struct platform_driver netcp_driver
= {
2174 .name
= "netcp-1.0",
2175 .of_match_table
= of_match
,
2177 .probe
= netcp_probe
,
2178 .remove
= netcp_remove
,
2180 module_platform_driver(netcp_driver
);
2182 MODULE_LICENSE("GPL v2");
2183 MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs");
2184 MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com");