2 * FUJITSU Extended Socket Network Device driver
3 * Copyright (c) 2015 FUJITSU LIMITED
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, see <http://www.gnu.org/licenses/>.
17 * The full GNU General Public License is included in this distribution in
18 * the file called "COPYING".
22 #include <linux/module.h>
23 #include <linux/types.h>
24 #include <linux/nls.h>
25 #include <linux/platform_device.h>
26 #include <linux/netdevice.h>
27 #include <linux/interrupt.h>
30 #include "fjes_trace.h"
34 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
35 #define DRV_NAME "fjes"
36 char fjes_driver_name[] = DRV_NAME;
37 char fjes_driver_version[] = DRV_VERSION;
38 static const char fjes_driver_string[] =
39 "FUJITSU Extended Socket Network Device Driver";
40 static const char fjes_copyright[] =
41 "Copyright (c) 2015 FUJITSU LIMITED";
43 MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
44 MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
45 MODULE_LICENSE("GPL");
46 MODULE_VERSION(DRV_VERSION);
48 static int fjes_request_irq(struct fjes_adapter *);
49 static void fjes_free_irq(struct fjes_adapter *);
51 static int fjes_open(struct net_device *);
52 static int fjes_close(struct net_device *);
53 static int fjes_setup_resources(struct fjes_adapter *);
54 static void fjes_free_resources(struct fjes_adapter *);
55 static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
56 static void fjes_raise_intr_rxdata_task(struct work_struct *);
57 static void fjes_tx_stall_task(struct work_struct *);
58 static void fjes_force_close_task(struct work_struct *);
59 static irqreturn_t fjes_intr(int, void*);
60 static struct rtnl_link_stats64 *
61 fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *);
62 static int fjes_change_mtu(struct net_device *, int);
63 static int fjes_vlan_rx_add_vid(struct net_device *, __be16 proto, u16);
64 static int fjes_vlan_rx_kill_vid(struct net_device *, __be16 proto, u16);
65 static void fjes_tx_retry(struct net_device *);
67 static int fjes_acpi_add(struct acpi_device *);
68 static int fjes_acpi_remove(struct acpi_device *);
69 static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*);
71 static int fjes_probe(struct platform_device *);
72 static int fjes_remove(struct platform_device *);
74 static int fjes_sw_init(struct fjes_adapter *);
75 static void fjes_netdev_setup(struct net_device *);
76 static void fjes_irq_watch_task(struct work_struct *);
77 static void fjes_watch_unshare_task(struct work_struct *);
78 static void fjes_rx_irq(struct fjes_adapter *, int);
79 static int fjes_poll(struct napi_struct *, int);
81 static const struct acpi_device_id fjes_acpi_ids[] = {
85 MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
87 static struct acpi_driver fjes_acpi_driver = {
94 .remove = fjes_acpi_remove,
98 static struct platform_driver fjes_driver = {
103 .remove = fjes_remove,
106 static struct resource fjes_resource[] = {
108 .flags = IORESOURCE_MEM,
113 .flags = IORESOURCE_IRQ,
119 static int fjes_acpi_add(struct acpi_device *device)
121 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
122 char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
123 struct platform_device *plat_dev;
124 union acpi_object *str;
128 status = acpi_evaluate_object(device->handle, "_STR", NULL, &buffer);
129 if (ACPI_FAILURE(status))
132 str = buffer.pointer;
133 result = utf16s_to_utf8s((wchar_t *)str->string.pointer,
134 str->string.length, UTF16_LITTLE_ENDIAN,
135 str_buf, sizeof(str_buf) - 1);
138 if (strncmp(FJES_ACPI_SYMBOL, str_buf, strlen(FJES_ACPI_SYMBOL)) != 0) {
139 kfree(buffer.pointer);
142 kfree(buffer.pointer);
144 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
145 fjes_get_acpi_resource, fjes_resource);
146 if (ACPI_FAILURE(status))
149 /* create platform_device */
150 plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
151 ARRAY_SIZE(fjes_resource));
152 device->driver_data = plat_dev;
157 static int fjes_acpi_remove(struct acpi_device *device)
159 struct platform_device *plat_dev;
161 plat_dev = (struct platform_device *)acpi_driver_data(device);
162 platform_device_unregister(plat_dev);
168 fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
170 struct acpi_resource_address32 *addr;
171 struct acpi_resource_irq *irq;
172 struct resource *res = data;
174 switch (acpi_res->type) {
175 case ACPI_RESOURCE_TYPE_ADDRESS32:
176 addr = &acpi_res->data.address32;
177 res[0].start = addr->address.minimum;
178 res[0].end = addr->address.minimum +
179 addr->address.address_length - 1;
182 case ACPI_RESOURCE_TYPE_IRQ:
183 irq = &acpi_res->data.irq;
184 if (irq->interrupt_count != 1)
186 res[1].start = irq->interrupts[0];
187 res[1].end = irq->interrupts[0];
197 static int fjes_request_irq(struct fjes_adapter *adapter)
199 struct net_device *netdev = adapter->netdev;
202 adapter->interrupt_watch_enable = true;
203 if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
204 queue_delayed_work(adapter->control_wq,
205 &adapter->interrupt_watch_task,
206 FJES_IRQ_WATCH_DELAY);
209 if (!adapter->irq_registered) {
210 result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
211 IRQF_SHARED, netdev->name, adapter);
213 adapter->irq_registered = false;
215 adapter->irq_registered = true;
221 static void fjes_free_irq(struct fjes_adapter *adapter)
223 struct fjes_hw *hw = &adapter->hw;
225 adapter->interrupt_watch_enable = false;
226 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
228 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
230 if (adapter->irq_registered) {
231 free_irq(adapter->hw.hw_res.irq, adapter);
232 adapter->irq_registered = false;
236 static const struct net_device_ops fjes_netdev_ops = {
237 .ndo_open = fjes_open,
238 .ndo_stop = fjes_close,
239 .ndo_start_xmit = fjes_xmit_frame,
240 .ndo_get_stats64 = fjes_get_stats64,
241 .ndo_change_mtu = fjes_change_mtu,
242 .ndo_tx_timeout = fjes_tx_retry,
243 .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid,
244 .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
247 /* fjes_open - Called when a network interface is made active */
248 static int fjes_open(struct net_device *netdev)
250 struct fjes_adapter *adapter = netdev_priv(netdev);
251 struct fjes_hw *hw = &adapter->hw;
254 if (adapter->open_guard)
257 result = fjes_setup_resources(adapter);
261 hw->txrx_stop_req_bit = 0;
262 hw->epstop_req_bit = 0;
264 napi_enable(&adapter->napi);
266 fjes_hw_capture_interrupt_status(hw);
268 result = fjes_request_irq(adapter);
272 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
274 netif_tx_start_all_queues(netdev);
275 netif_carrier_on(netdev);
280 fjes_free_irq(adapter);
281 napi_disable(&adapter->napi);
284 fjes_free_resources(adapter);
288 /* fjes_close - Disables a network interface */
289 static int fjes_close(struct net_device *netdev)
291 struct fjes_adapter *adapter = netdev_priv(netdev);
292 struct fjes_hw *hw = &adapter->hw;
296 netif_tx_stop_all_queues(netdev);
297 netif_carrier_off(netdev);
299 fjes_hw_raise_epstop(hw);
301 napi_disable(&adapter->napi);
303 spin_lock_irqsave(&hw->rx_status_lock, flags);
304 for (epidx = 0; epidx < hw->max_epid; epidx++) {
305 if (epidx == hw->my_epid)
308 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
310 adapter->hw.ep_shm_info[epidx]
311 .tx.info->v1i.rx_status &=
314 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
316 fjes_free_irq(adapter);
318 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
319 cancel_work_sync(&adapter->unshare_watch_task);
320 adapter->unshare_watch_bitmask = 0;
321 cancel_work_sync(&adapter->raise_intr_rxdata_task);
322 cancel_work_sync(&adapter->tx_stall_task);
324 cancel_work_sync(&hw->update_zone_task);
325 cancel_work_sync(&hw->epstop_task);
327 fjes_hw_wait_epstop(hw);
329 fjes_free_resources(adapter);
334 static int fjes_setup_resources(struct fjes_adapter *adapter)
336 struct net_device *netdev = adapter->netdev;
337 struct ep_share_mem_info *buf_pair;
338 struct fjes_hw *hw = &adapter->hw;
343 mutex_lock(&hw->hw_info.lock);
344 result = fjes_hw_request_info(hw);
347 for (epidx = 0; epidx < hw->max_epid; epidx++) {
348 hw->ep_shm_info[epidx].es_status =
349 hw->hw_info.res_buf->info.info[epidx].es_status;
350 hw->ep_shm_info[epidx].zone =
351 hw->hw_info.res_buf->info.info[epidx].zone;
357 adapter->force_reset = true;
359 mutex_unlock(&hw->hw_info.lock);
362 mutex_unlock(&hw->hw_info.lock);
364 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
365 if ((epidx != hw->my_epid) &&
366 (hw->ep_shm_info[epidx].es_status ==
367 FJES_ZONING_STATUS_ENABLE)) {
368 fjes_hw_raise_interrupt(hw, epidx,
369 REG_ICTL_MASK_INFO_UPDATE);
370 hw->ep_shm_info[epidx].ep_stats
371 .send_intr_zoneupdate += 1;
375 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
377 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
378 if (epidx == hw->my_epid)
381 buf_pair = &hw->ep_shm_info[epidx];
383 spin_lock_irqsave(&hw->rx_status_lock, flags);
384 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
386 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
388 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
389 mutex_lock(&hw->hw_info.lock);
391 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
392 mutex_unlock(&hw->hw_info.lock);
400 adapter->force_reset = true;
404 hw->ep_shm_info[epidx].ep_stats
405 .com_regist_buf_exec += 1;
412 static void fjes_free_resources(struct fjes_adapter *adapter)
414 struct net_device *netdev = adapter->netdev;
415 struct fjes_device_command_param param;
416 struct ep_share_mem_info *buf_pair;
417 struct fjes_hw *hw = &adapter->hw;
418 bool reset_flag = false;
423 for (epidx = 0; epidx < hw->max_epid; epidx++) {
424 if (epidx == hw->my_epid)
427 mutex_lock(&hw->hw_info.lock);
428 result = fjes_hw_unregister_buff_addr(hw, epidx);
429 mutex_unlock(&hw->hw_info.lock);
431 hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1;
436 buf_pair = &hw->ep_shm_info[epidx];
438 spin_lock_irqsave(&hw->rx_status_lock, flags);
439 fjes_hw_setup_epbuf(&buf_pair->tx,
440 netdev->dev_addr, netdev->mtu);
441 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
443 clear_bit(epidx, &hw->txrx_stop_req_bit);
446 if (reset_flag || adapter->force_reset) {
447 result = fjes_hw_reset(hw);
449 adapter->force_reset = false;
452 adapter->open_guard = true;
454 hw->hw_info.buffer_share_bit = 0;
456 memset((void *)¶m, 0, sizeof(param));
458 param.req_len = hw->hw_info.req_buf_size;
459 param.req_start = __pa(hw->hw_info.req_buf);
460 param.res_len = hw->hw_info.res_buf_size;
461 param.res_start = __pa(hw->hw_info.res_buf);
462 param.share_start = __pa(hw->hw_info.share->ep_status);
464 fjes_hw_init_command_registers(hw, ¶m);
468 static void fjes_tx_stall_task(struct work_struct *work)
470 struct fjes_adapter *adapter = container_of(work,
471 struct fjes_adapter, tx_stall_task);
472 struct net_device *netdev = adapter->netdev;
473 struct fjes_hw *hw = &adapter->hw;
474 int all_queue_available, sendable;
475 enum ep_partner_status pstatus;
476 int max_epid, my_epid, epid;
477 union ep_buffer_info *info;
481 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
482 netif_wake_queue(netdev);
486 my_epid = hw->my_epid;
487 max_epid = hw->max_epid;
489 for (i = 0; i < 5; i++) {
490 all_queue_available = 1;
492 for (epid = 0; epid < max_epid; epid++) {
496 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
497 sendable = (pstatus == EP_PARTNER_SHARED);
501 info = adapter->hw.ep_shm_info[epid].tx.info;
503 if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
506 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
507 info->v1i.count_max)) {
508 all_queue_available = 0;
513 if (all_queue_available) {
514 netif_wake_queue(netdev);
519 usleep_range(50, 100);
521 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
524 static void fjes_force_close_task(struct work_struct *work)
526 struct fjes_adapter *adapter = container_of(work,
527 struct fjes_adapter, force_close_task);
528 struct net_device *netdev = adapter->netdev;
535 static void fjes_raise_intr_rxdata_task(struct work_struct *work)
537 struct fjes_adapter *adapter = container_of(work,
538 struct fjes_adapter, raise_intr_rxdata_task);
539 struct fjes_hw *hw = &adapter->hw;
540 enum ep_partner_status pstatus;
541 int max_epid, my_epid, epid;
543 my_epid = hw->my_epid;
544 max_epid = hw->max_epid;
546 for (epid = 0; epid < max_epid; epid++)
547 hw->ep_shm_info[epid].tx_status_work = 0;
549 for (epid = 0; epid < max_epid; epid++) {
553 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
554 if (pstatus == EP_PARTNER_SHARED) {
555 hw->ep_shm_info[epid].tx_status_work =
556 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
558 if (hw->ep_shm_info[epid].tx_status_work ==
559 FJES_TX_DELAY_SEND_PENDING) {
560 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
561 FJES_TX_DELAY_SEND_NONE;
566 for (epid = 0; epid < max_epid; epid++) {
570 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
571 if ((hw->ep_shm_info[epid].tx_status_work ==
572 FJES_TX_DELAY_SEND_PENDING) &&
573 (pstatus == EP_PARTNER_SHARED) &&
574 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
575 FJES_RX_POLL_WORK)) {
576 fjes_hw_raise_interrupt(hw, epid,
577 REG_ICTL_MASK_RX_DATA);
578 hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1;
582 usleep_range(500, 1000);
585 static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
586 void *data, size_t len)
590 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
595 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
596 FJES_TX_DELAY_SEND_PENDING;
597 if (!work_pending(&adapter->raise_intr_rxdata_task))
598 queue_work(adapter->txrx_wq,
599 &adapter->raise_intr_rxdata_task);
606 fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
608 struct fjes_adapter *adapter = netdev_priv(netdev);
609 struct fjes_hw *hw = &adapter->hw;
611 int max_epid, my_epid, dest_epid;
612 enum ep_partner_status pstatus;
613 struct netdev_queue *cur_queue;
614 char shortpkt[VLAN_ETH_HLEN];
625 cur_queue = netdev_get_tx_queue(netdev, queue_no);
627 eth = (struct ethhdr *)skb->data;
628 my_epid = hw->my_epid;
630 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
635 if (is_multicast_ether_addr(eth->h_dest)) {
637 max_epid = hw->max_epid;
639 } else if (is_local_ether_addr(eth->h_dest)) {
640 dest_epid = eth->h_dest[ETH_ALEN - 1];
641 max_epid = dest_epid + 1;
643 if ((eth->h_dest[0] == 0x02) &&
644 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
645 eth->h_dest[3] | eth->h_dest[4])) &&
646 (dest_epid < hw->max_epid)) {
653 adapter->stats64.tx_packets += 1;
654 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
655 adapter->stats64.tx_bytes += len;
656 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
663 adapter->stats64.tx_packets += 1;
664 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
665 adapter->stats64.tx_bytes += len;
666 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
669 for (; dest_epid < max_epid; dest_epid++) {
670 if (my_epid == dest_epid)
673 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
674 if (pstatus != EP_PARTNER_SHARED) {
676 hw->ep_shm_info[dest_epid].ep_stats
677 .tx_dropped_not_shared += 1;
679 } else if (!fjes_hw_check_epbuf_version(
680 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
681 /* version is NOT 0 */
682 adapter->stats64.tx_carrier_errors += 1;
683 hw->ep_shm_info[dest_epid].net_stats
684 .tx_carrier_errors += 1;
685 hw->ep_shm_info[dest_epid].ep_stats
686 .tx_dropped_ver_mismatch += 1;
689 } else if (!fjes_hw_check_mtu(
690 &adapter->hw.ep_shm_info[dest_epid].rx,
692 adapter->stats64.tx_dropped += 1;
693 hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
694 adapter->stats64.tx_errors += 1;
695 hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
696 hw->ep_shm_info[dest_epid].ep_stats
697 .tx_dropped_buf_size_mismatch += 1;
701 !fjes_hw_check_vlan_id(
702 &adapter->hw.ep_shm_info[dest_epid].rx,
704 hw->ep_shm_info[dest_epid].ep_stats
705 .tx_dropped_vlanid_mismatch += 1;
708 if (len < VLAN_ETH_HLEN) {
709 memset(shortpkt, 0, VLAN_ETH_HLEN);
710 memcpy(shortpkt, skb->data, skb->len);
715 if (adapter->tx_retry_count == 0) {
716 adapter->tx_start_jiffies = jiffies;
717 adapter->tx_retry_count = 1;
719 adapter->tx_retry_count++;
722 if (fjes_tx_send(adapter, dest_epid, data, len)) {
727 (long)adapter->tx_start_jiffies) >=
728 FJES_TX_RETRY_TIMEOUT) {
729 adapter->stats64.tx_fifo_errors += 1;
730 hw->ep_shm_info[dest_epid].net_stats
731 .tx_fifo_errors += 1;
732 adapter->stats64.tx_errors += 1;
733 hw->ep_shm_info[dest_epid].net_stats
738 netif_trans_update(netdev);
739 hw->ep_shm_info[dest_epid].ep_stats
740 .tx_buffer_full += 1;
741 netif_tx_stop_queue(cur_queue);
743 if (!work_pending(&adapter->tx_stall_task))
744 queue_work(adapter->txrx_wq,
745 &adapter->tx_stall_task);
747 ret = NETDEV_TX_BUSY;
751 adapter->stats64.tx_packets += 1;
752 hw->ep_shm_info[dest_epid].net_stats
754 adapter->stats64.tx_bytes += len;
755 hw->ep_shm_info[dest_epid].net_stats
759 adapter->tx_retry_count = 0;
765 if (ret == NETDEV_TX_OK) {
768 adapter->stats64.tx_packets += 1;
769 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
770 adapter->stats64.tx_bytes += 1;
771 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
778 static void fjes_tx_retry(struct net_device *netdev)
780 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
782 netif_tx_wake_queue(queue);
785 static struct rtnl_link_stats64 *
786 fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
788 struct fjes_adapter *adapter = netdev_priv(netdev);
790 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
795 static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
797 struct fjes_adapter *adapter = netdev_priv(netdev);
798 bool running = netif_running(netdev);
799 struct fjes_hw *hw = &adapter->hw;
804 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
805 if (new_mtu <= fjes_support_mtu[idx]) {
806 new_mtu = fjes_support_mtu[idx];
807 if (new_mtu == netdev->mtu)
819 spin_lock_irqsave(&hw->rx_status_lock, flags);
820 for (epidx = 0; epidx < hw->max_epid; epidx++) {
821 if (epidx == hw->my_epid)
823 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
824 ~FJES_RX_MTU_CHANGING_DONE;
826 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
828 netif_tx_stop_all_queues(netdev);
829 netif_carrier_off(netdev);
830 cancel_work_sync(&adapter->tx_stall_task);
831 napi_disable(&adapter->napi);
835 netif_tx_stop_all_queues(netdev);
838 netdev->mtu = new_mtu;
841 for (epidx = 0; epidx < hw->max_epid; epidx++) {
842 if (epidx == hw->my_epid)
845 spin_lock_irqsave(&hw->rx_status_lock, flags);
846 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
850 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
851 FJES_RX_MTU_CHANGING_DONE;
852 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
855 netif_tx_wake_all_queues(netdev);
856 netif_carrier_on(netdev);
857 napi_enable(&adapter->napi);
858 napi_schedule(&adapter->napi);
864 static int fjes_vlan_rx_add_vid(struct net_device *netdev,
865 __be16 proto, u16 vid)
867 struct fjes_adapter *adapter = netdev_priv(netdev);
871 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
872 if (epid == adapter->hw.my_epid)
875 if (!fjes_hw_check_vlan_id(
876 &adapter->hw.ep_shm_info[epid].tx, vid))
877 ret = fjes_hw_set_vlan_id(
878 &adapter->hw.ep_shm_info[epid].tx, vid);
881 return ret ? 0 : -ENOSPC;
884 static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
885 __be16 proto, u16 vid)
887 struct fjes_adapter *adapter = netdev_priv(netdev);
890 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
891 if (epid == adapter->hw.my_epid)
894 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
900 static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
903 struct fjes_hw *hw = &adapter->hw;
904 enum ep_partner_status status;
907 status = fjes_hw_get_partner_ep_status(hw, src_epid);
908 trace_fjes_txrx_stop_req_irq_pre(hw, src_epid, status);
910 case EP_PARTNER_UNSHARE:
911 case EP_PARTNER_COMPLETE:
914 case EP_PARTNER_WAITING:
915 if (src_epid < hw->my_epid) {
916 spin_lock_irqsave(&hw->rx_status_lock, flags);
917 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
918 FJES_RX_STOP_REQ_DONE;
919 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
921 clear_bit(src_epid, &hw->txrx_stop_req_bit);
922 set_bit(src_epid, &adapter->unshare_watch_bitmask);
924 if (!work_pending(&adapter->unshare_watch_task))
925 queue_work(adapter->control_wq,
926 &adapter->unshare_watch_task);
929 case EP_PARTNER_SHARED:
930 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
931 FJES_RX_STOP_REQ_REQUEST) {
932 set_bit(src_epid, &hw->epstop_req_bit);
933 if (!work_pending(&hw->epstop_task))
934 queue_work(adapter->control_wq,
939 trace_fjes_txrx_stop_req_irq_post(hw, src_epid);
942 static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
944 struct fjes_hw *hw = &adapter->hw;
945 enum ep_partner_status status;
948 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
950 status = fjes_hw_get_partner_ep_status(hw, src_epid);
951 trace_fjes_stop_req_irq_pre(hw, src_epid, status);
953 case EP_PARTNER_WAITING:
954 spin_lock_irqsave(&hw->rx_status_lock, flags);
955 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
956 FJES_RX_STOP_REQ_DONE;
957 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
958 clear_bit(src_epid, &hw->txrx_stop_req_bit);
960 case EP_PARTNER_UNSHARE:
961 case EP_PARTNER_COMPLETE:
963 set_bit(src_epid, &adapter->unshare_watch_bitmask);
964 if (!work_pending(&adapter->unshare_watch_task))
965 queue_work(adapter->control_wq,
966 &adapter->unshare_watch_task);
968 case EP_PARTNER_SHARED:
969 set_bit(src_epid, &hw->epstop_req_bit);
971 if (!work_pending(&hw->epstop_task))
972 queue_work(adapter->control_wq, &hw->epstop_task);
975 trace_fjes_stop_req_irq_post(hw, src_epid);
978 static void fjes_update_zone_irq(struct fjes_adapter *adapter,
981 struct fjes_hw *hw = &adapter->hw;
983 if (!work_pending(&hw->update_zone_task))
984 queue_work(adapter->control_wq, &hw->update_zone_task);
987 static irqreturn_t fjes_intr(int irq, void *data)
989 struct fjes_adapter *adapter = data;
990 struct fjes_hw *hw = &adapter->hw;
994 icr = fjes_hw_capture_interrupt_status(hw);
996 if (icr & REG_IS_MASK_IS_ASSERT) {
997 if (icr & REG_ICTL_MASK_RX_DATA) {
998 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
999 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1003 if (icr & REG_ICTL_MASK_DEV_STOP_REQ) {
1004 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1005 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1006 .recv_intr_stop += 1;
1009 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) {
1010 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1011 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1012 .recv_intr_unshare += 1;
1015 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
1016 fjes_hw_set_irqmask(hw,
1017 REG_ICTL_MASK_TXRX_STOP_DONE, true);
1019 if (icr & REG_ICTL_MASK_INFO_UPDATE) {
1020 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
1021 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1022 .recv_intr_zoneupdate += 1;
1033 static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
1036 struct fjes_hw *hw = &adapter->hw;
1037 enum ep_partner_status pstatus;
1038 int max_epid, cur_epid;
1041 max_epid = hw->max_epid;
1042 start_epid = (start_epid + 1 + max_epid) % max_epid;
1044 for (i = 0; i < max_epid; i++) {
1045 cur_epid = (start_epid + i) % max_epid;
1046 if (cur_epid == hw->my_epid)
1049 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
1050 if (pstatus == EP_PARTNER_SHARED) {
1051 if (!fjes_hw_epbuf_rx_is_empty(
1052 &hw->ep_shm_info[cur_epid].rx))
1059 static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
1064 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
1069 fjes_hw_epbuf_rx_curpkt_get_addr(
1070 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
1075 static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
1077 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
1080 static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
1082 struct fjes_hw *hw = &adapter->hw;
1084 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
1086 adapter->unset_rx_last = true;
1087 napi_schedule(&adapter->napi);
1090 static int fjes_poll(struct napi_struct *napi, int budget)
1092 struct fjes_adapter *adapter =
1093 container_of(napi, struct fjes_adapter, napi);
1094 struct net_device *netdev = napi->dev;
1095 struct fjes_hw *hw = &adapter->hw;
1096 struct sk_buff *skb;
1103 spin_lock(&hw->rx_status_lock);
1104 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1105 if (epidx == hw->my_epid)
1108 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1110 adapter->hw.ep_shm_info[epidx]
1111 .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
1113 spin_unlock(&hw->rx_status_lock);
1115 while (work_done < budget) {
1116 prefetch(&adapter->hw);
1117 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
1120 skb = napi_alloc_skb(napi, frame_len);
1122 adapter->stats64.rx_dropped += 1;
1123 hw->ep_shm_info[cur_epid].net_stats
1125 adapter->stats64.rx_errors += 1;
1126 hw->ep_shm_info[cur_epid].net_stats
1129 memcpy(skb_put(skb, frame_len),
1131 skb->protocol = eth_type_trans(skb, netdev);
1132 skb->ip_summed = CHECKSUM_UNNECESSARY;
1134 netif_receive_skb(skb);
1138 adapter->stats64.rx_packets += 1;
1139 hw->ep_shm_info[cur_epid].net_stats
1141 adapter->stats64.rx_bytes += frame_len;
1142 hw->ep_shm_info[cur_epid].net_stats
1143 .rx_bytes += frame_len;
1145 if (is_multicast_ether_addr(
1146 ((struct ethhdr *)frame)->h_dest)) {
1147 adapter->stats64.multicast += 1;
1148 hw->ep_shm_info[cur_epid].net_stats
1153 fjes_rxframe_release(adapter, cur_epid);
1154 adapter->unset_rx_last = true;
1160 if (work_done < budget) {
1161 napi_complete(napi);
1163 if (adapter->unset_rx_last) {
1164 adapter->rx_last_jiffies = jiffies;
1165 adapter->unset_rx_last = false;
1168 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1169 napi_reschedule(napi);
1171 spin_lock(&hw->rx_status_lock);
1172 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1173 if (epidx == hw->my_epid)
1175 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1177 adapter->hw.ep_shm_info[epidx].tx
1178 .info->v1i.rx_status &=
1181 spin_unlock(&hw->rx_status_lock);
1183 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1190 /* fjes_probe - Device Initialization Routine */
1191 static int fjes_probe(struct platform_device *plat_dev)
1193 struct fjes_adapter *adapter;
1194 struct net_device *netdev;
1195 struct resource *res;
1200 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1201 NET_NAME_UNKNOWN, fjes_netdev_setup,
1207 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1209 dev_set_drvdata(&plat_dev->dev, netdev);
1210 adapter = netdev_priv(netdev);
1211 adapter->netdev = netdev;
1212 adapter->plat_dev = plat_dev;
1216 /* setup the private structure */
1217 err = fjes_sw_init(adapter);
1219 goto err_free_netdev;
1221 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1222 adapter->force_reset = false;
1223 adapter->open_guard = false;
1225 adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1226 adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1229 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1230 INIT_WORK(&adapter->raise_intr_rxdata_task,
1231 fjes_raise_intr_rxdata_task);
1232 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1233 adapter->unshare_watch_bitmask = 0;
1235 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1236 adapter->interrupt_watch_enable = false;
1238 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1239 hw->hw_res.start = res->start;
1240 hw->hw_res.size = resource_size(res);
1241 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1242 err = fjes_hw_init(&adapter->hw);
1244 goto err_free_netdev;
1246 /* setup MAC address (02:00:00:00:00:[epid])*/
1247 netdev->dev_addr[0] = 2;
1248 netdev->dev_addr[1] = 0;
1249 netdev->dev_addr[2] = 0;
1250 netdev->dev_addr[3] = 0;
1251 netdev->dev_addr[4] = 0;
1252 netdev->dev_addr[5] = hw->my_epid; /* EPID */
1254 err = register_netdev(netdev);
1258 netif_carrier_off(netdev);
1263 fjes_hw_exit(&adapter->hw);
1265 free_netdev(netdev);
1270 /* fjes_remove - Device Removal Routine */
1271 static int fjes_remove(struct platform_device *plat_dev)
1273 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1274 struct fjes_adapter *adapter = netdev_priv(netdev);
1275 struct fjes_hw *hw = &adapter->hw;
1277 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1278 cancel_work_sync(&adapter->unshare_watch_task);
1279 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1280 cancel_work_sync(&adapter->tx_stall_task);
1281 if (adapter->control_wq)
1282 destroy_workqueue(adapter->control_wq);
1283 if (adapter->txrx_wq)
1284 destroy_workqueue(adapter->txrx_wq);
1286 unregister_netdev(netdev);
1290 netif_napi_del(&adapter->napi);
1292 free_netdev(netdev);
1297 static int fjes_sw_init(struct fjes_adapter *adapter)
1299 struct net_device *netdev = adapter->netdev;
1301 netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);
1306 /* fjes_netdev_setup - netdevice initialization routine */
1307 static void fjes_netdev_setup(struct net_device *netdev)
1309 ether_setup(netdev);
1311 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
1312 netdev->netdev_ops = &fjes_netdev_ops;
1313 fjes_set_ethtool_ops(netdev);
1314 netdev->mtu = fjes_support_mtu[3];
1315 netdev->flags |= IFF_BROADCAST;
1316 netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER;
1319 static void fjes_irq_watch_task(struct work_struct *work)
1321 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1322 struct fjes_adapter, interrupt_watch_task);
1324 local_irq_disable();
1325 fjes_intr(adapter->hw.hw_res.irq, adapter);
1328 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1329 napi_schedule(&adapter->napi);
1331 if (adapter->interrupt_watch_enable) {
1332 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1333 queue_delayed_work(adapter->control_wq,
1334 &adapter->interrupt_watch_task,
1335 FJES_IRQ_WATCH_DELAY);
1339 static void fjes_watch_unshare_task(struct work_struct *work)
1341 struct fjes_adapter *adapter =
1342 container_of(work, struct fjes_adapter, unshare_watch_task);
1344 struct net_device *netdev = adapter->netdev;
1345 struct fjes_hw *hw = &adapter->hw;
1347 int unshare_watch, unshare_reserve;
1348 int max_epid, my_epid, epidx;
1349 int stop_req, stop_req_done;
1350 ulong unshare_watch_bitmask;
1351 unsigned long flags;
1356 my_epid = hw->my_epid;
1357 max_epid = hw->max_epid;
1359 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1360 adapter->unshare_watch_bitmask = 0;
1362 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1363 (wait_time < 3000)) {
1364 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1365 if (epidx == hw->my_epid)
1368 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1371 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1373 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1374 FJES_RX_STOP_REQ_DONE;
1376 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1378 unshare_reserve = test_bit(epidx,
1379 &hw->hw_info.buffer_unshare_reserve_bit);
1382 (is_shared && (!is_shared || !stop_req_done))) &&
1383 (is_shared || !unshare_watch || !unshare_reserve))
1386 mutex_lock(&hw->hw_info.lock);
1387 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1395 &adapter->force_close_task)) {
1396 adapter->force_reset = true;
1398 &adapter->force_close_task);
1402 mutex_unlock(&hw->hw_info.lock);
1403 hw->ep_shm_info[epidx].ep_stats
1404 .com_unregist_buf_exec += 1;
1406 spin_lock_irqsave(&hw->rx_status_lock, flags);
1407 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1408 netdev->dev_addr, netdev->mtu);
1409 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1411 clear_bit(epidx, &hw->txrx_stop_req_bit);
1412 clear_bit(epidx, &unshare_watch_bitmask);
1414 &hw->hw_info.buffer_unshare_reserve_bit);
1421 if (hw->hw_info.buffer_unshare_reserve_bit) {
1422 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1423 if (epidx == hw->my_epid)
1427 &hw->hw_info.buffer_unshare_reserve_bit)) {
1428 mutex_lock(&hw->hw_info.lock);
1430 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1438 &adapter->force_close_task)) {
1439 adapter->force_reset = true;
1441 &adapter->force_close_task);
1445 mutex_unlock(&hw->hw_info.lock);
1447 hw->ep_shm_info[epidx].ep_stats
1448 .com_unregist_buf_exec += 1;
1450 spin_lock_irqsave(&hw->rx_status_lock, flags);
1451 fjes_hw_setup_epbuf(
1452 &hw->ep_shm_info[epidx].tx,
1453 netdev->dev_addr, netdev->mtu);
1454 spin_unlock_irqrestore(&hw->rx_status_lock,
1457 clear_bit(epidx, &hw->txrx_stop_req_bit);
1458 clear_bit(epidx, &unshare_watch_bitmask);
1459 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1462 if (test_bit(epidx, &unshare_watch_bitmask)) {
1463 spin_lock_irqsave(&hw->rx_status_lock, flags);
1464 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1465 ~FJES_RX_STOP_REQ_DONE;
1466 spin_unlock_irqrestore(&hw->rx_status_lock,
1473 /* fjes_init_module - Driver Registration Routine */
1474 static int __init fjes_init_module(void)
1478 pr_info("%s - version %s - %s\n",
1479 fjes_driver_string, fjes_driver_version, fjes_copyright);
1481 result = platform_driver_register(&fjes_driver);
1485 result = acpi_bus_register_driver(&fjes_acpi_driver);
1487 goto fail_acpi_driver;
1492 platform_driver_unregister(&fjes_driver);
1496 module_init(fjes_init_module);
1498 /* fjes_exit_module - Driver Exit Cleanup Routine */
1499 static void __exit fjes_exit_module(void)
1501 acpi_bus_unregister_driver(&fjes_acpi_driver);
1502 platform_driver_unregister(&fjes_driver);
1505 module_exit(fjes_exit_module);