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>
33 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
34 #define DRV_NAME "fjes"
35 char fjes_driver_name[] = DRV_NAME;
36 char fjes_driver_version[] = DRV_VERSION;
37 static const char fjes_driver_string[] =
38 "FUJITSU Extended Socket Network Device Driver";
39 static const char fjes_copyright[] =
40 "Copyright (c) 2015 FUJITSU LIMITED";
42 MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
43 MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
44 MODULE_LICENSE("GPL");
45 MODULE_VERSION(DRV_VERSION);
47 static int fjes_request_irq(struct fjes_adapter *);
48 static void fjes_free_irq(struct fjes_adapter *);
50 static int fjes_open(struct net_device *);
51 static int fjes_close(struct net_device *);
52 static int fjes_setup_resources(struct fjes_adapter *);
53 static void fjes_free_resources(struct fjes_adapter *);
54 static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
55 static void fjes_raise_intr_rxdata_task(struct work_struct *);
56 static void fjes_tx_stall_task(struct work_struct *);
57 static void fjes_force_close_task(struct work_struct *);
58 static irqreturn_t fjes_intr(int, void*);
59 static struct rtnl_link_stats64 *
60 fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *);
61 static int fjes_change_mtu(struct net_device *, int);
62 static int fjes_vlan_rx_add_vid(struct net_device *, __be16 proto, u16);
63 static int fjes_vlan_rx_kill_vid(struct net_device *, __be16 proto, u16);
64 static void fjes_tx_retry(struct net_device *);
66 static int fjes_acpi_add(struct acpi_device *);
67 static int fjes_acpi_remove(struct acpi_device *);
68 static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*);
70 static int fjes_probe(struct platform_device *);
71 static int fjes_remove(struct platform_device *);
73 static int fjes_sw_init(struct fjes_adapter *);
74 static void fjes_netdev_setup(struct net_device *);
75 static void fjes_irq_watch_task(struct work_struct *);
76 static void fjes_watch_unshare_task(struct work_struct *);
77 static void fjes_rx_irq(struct fjes_adapter *, int);
78 static int fjes_poll(struct napi_struct *, int);
80 static const struct acpi_device_id fjes_acpi_ids[] = {
84 MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
86 static struct acpi_driver fjes_acpi_driver = {
93 .remove = fjes_acpi_remove,
97 static struct platform_driver fjes_driver = {
102 .remove = fjes_remove,
105 static struct resource fjes_resource[] = {
107 .flags = IORESOURCE_MEM,
112 .flags = IORESOURCE_IRQ,
118 static int fjes_acpi_add(struct acpi_device *device)
120 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
121 char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
122 struct platform_device *plat_dev;
123 union acpi_object *str;
127 status = acpi_evaluate_object(device->handle, "_STR", NULL, &buffer);
128 if (ACPI_FAILURE(status))
131 str = buffer.pointer;
132 result = utf16s_to_utf8s((wchar_t *)str->string.pointer,
133 str->string.length, UTF16_LITTLE_ENDIAN,
134 str_buf, sizeof(str_buf) - 1);
137 if (strncmp(FJES_ACPI_SYMBOL, str_buf, strlen(FJES_ACPI_SYMBOL)) != 0) {
138 kfree(buffer.pointer);
141 kfree(buffer.pointer);
143 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
144 fjes_get_acpi_resource, fjes_resource);
145 if (ACPI_FAILURE(status))
148 /* create platform_device */
149 plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
150 ARRAY_SIZE(fjes_resource));
151 device->driver_data = plat_dev;
156 static int fjes_acpi_remove(struct acpi_device *device)
158 struct platform_device *plat_dev;
160 plat_dev = (struct platform_device *)acpi_driver_data(device);
161 platform_device_unregister(plat_dev);
167 fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
169 struct acpi_resource_address32 *addr;
170 struct acpi_resource_irq *irq;
171 struct resource *res = data;
173 switch (acpi_res->type) {
174 case ACPI_RESOURCE_TYPE_ADDRESS32:
175 addr = &acpi_res->data.address32;
176 res[0].start = addr->address.minimum;
177 res[0].end = addr->address.minimum +
178 addr->address.address_length - 1;
181 case ACPI_RESOURCE_TYPE_IRQ:
182 irq = &acpi_res->data.irq;
183 if (irq->interrupt_count != 1)
185 res[1].start = irq->interrupts[0];
186 res[1].end = irq->interrupts[0];
196 static int fjes_request_irq(struct fjes_adapter *adapter)
198 struct net_device *netdev = adapter->netdev;
201 adapter->interrupt_watch_enable = true;
202 if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
203 queue_delayed_work(adapter->control_wq,
204 &adapter->interrupt_watch_task,
205 FJES_IRQ_WATCH_DELAY);
208 if (!adapter->irq_registered) {
209 result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
210 IRQF_SHARED, netdev->name, adapter);
212 adapter->irq_registered = false;
214 adapter->irq_registered = true;
220 static void fjes_free_irq(struct fjes_adapter *adapter)
222 struct fjes_hw *hw = &adapter->hw;
224 adapter->interrupt_watch_enable = false;
225 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
227 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
229 if (adapter->irq_registered) {
230 free_irq(adapter->hw.hw_res.irq, adapter);
231 adapter->irq_registered = false;
235 static const struct net_device_ops fjes_netdev_ops = {
236 .ndo_open = fjes_open,
237 .ndo_stop = fjes_close,
238 .ndo_start_xmit = fjes_xmit_frame,
239 .ndo_get_stats64 = fjes_get_stats64,
240 .ndo_change_mtu = fjes_change_mtu,
241 .ndo_tx_timeout = fjes_tx_retry,
242 .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid,
243 .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
246 /* fjes_open - Called when a network interface is made active */
247 static int fjes_open(struct net_device *netdev)
249 struct fjes_adapter *adapter = netdev_priv(netdev);
250 struct fjes_hw *hw = &adapter->hw;
253 if (adapter->open_guard)
256 result = fjes_setup_resources(adapter);
260 hw->txrx_stop_req_bit = 0;
261 hw->epstop_req_bit = 0;
263 napi_enable(&adapter->napi);
265 fjes_hw_capture_interrupt_status(hw);
267 result = fjes_request_irq(adapter);
271 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
273 netif_tx_start_all_queues(netdev);
274 netif_carrier_on(netdev);
279 fjes_free_irq(adapter);
280 napi_disable(&adapter->napi);
283 fjes_free_resources(adapter);
287 /* fjes_close - Disables a network interface */
288 static int fjes_close(struct net_device *netdev)
290 struct fjes_adapter *adapter = netdev_priv(netdev);
291 struct fjes_hw *hw = &adapter->hw;
295 netif_tx_stop_all_queues(netdev);
296 netif_carrier_off(netdev);
298 fjes_hw_raise_epstop(hw);
300 napi_disable(&adapter->napi);
302 spin_lock_irqsave(&hw->rx_status_lock, flags);
303 for (epidx = 0; epidx < hw->max_epid; epidx++) {
304 if (epidx == hw->my_epid)
307 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
309 adapter->hw.ep_shm_info[epidx]
310 .tx.info->v1i.rx_status &=
313 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
315 fjes_free_irq(adapter);
317 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
318 cancel_work_sync(&adapter->unshare_watch_task);
319 adapter->unshare_watch_bitmask = 0;
320 cancel_work_sync(&adapter->raise_intr_rxdata_task);
321 cancel_work_sync(&adapter->tx_stall_task);
323 cancel_work_sync(&hw->update_zone_task);
324 cancel_work_sync(&hw->epstop_task);
326 fjes_hw_wait_epstop(hw);
328 fjes_free_resources(adapter);
333 static int fjes_setup_resources(struct fjes_adapter *adapter)
335 struct net_device *netdev = adapter->netdev;
336 struct ep_share_mem_info *buf_pair;
337 struct fjes_hw *hw = &adapter->hw;
342 mutex_lock(&hw->hw_info.lock);
343 result = fjes_hw_request_info(hw);
346 for (epidx = 0; epidx < hw->max_epid; epidx++) {
347 hw->ep_shm_info[epidx].es_status =
348 hw->hw_info.res_buf->info.info[epidx].es_status;
349 hw->ep_shm_info[epidx].zone =
350 hw->hw_info.res_buf->info.info[epidx].zone;
356 adapter->force_reset = true;
358 mutex_unlock(&hw->hw_info.lock);
361 mutex_unlock(&hw->hw_info.lock);
363 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
364 if ((epidx != hw->my_epid) &&
365 (hw->ep_shm_info[epidx].es_status ==
366 FJES_ZONING_STATUS_ENABLE)) {
367 fjes_hw_raise_interrupt(hw, epidx,
368 REG_ICTL_MASK_INFO_UPDATE);
372 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
374 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
375 if (epidx == hw->my_epid)
378 buf_pair = &hw->ep_shm_info[epidx];
380 spin_lock_irqsave(&hw->rx_status_lock, flags);
381 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
383 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
385 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
386 mutex_lock(&hw->hw_info.lock);
388 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
389 mutex_unlock(&hw->hw_info.lock);
397 adapter->force_reset = true;
406 static void fjes_free_resources(struct fjes_adapter *adapter)
408 struct net_device *netdev = adapter->netdev;
409 struct fjes_device_command_param param;
410 struct ep_share_mem_info *buf_pair;
411 struct fjes_hw *hw = &adapter->hw;
412 bool reset_flag = false;
417 for (epidx = 0; epidx < hw->max_epid; epidx++) {
418 if (epidx == hw->my_epid)
421 mutex_lock(&hw->hw_info.lock);
422 result = fjes_hw_unregister_buff_addr(hw, epidx);
423 mutex_unlock(&hw->hw_info.lock);
428 buf_pair = &hw->ep_shm_info[epidx];
430 spin_lock_irqsave(&hw->rx_status_lock, flags);
431 fjes_hw_setup_epbuf(&buf_pair->tx,
432 netdev->dev_addr, netdev->mtu);
433 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
435 clear_bit(epidx, &hw->txrx_stop_req_bit);
438 if (reset_flag || adapter->force_reset) {
439 result = fjes_hw_reset(hw);
441 adapter->force_reset = false;
444 adapter->open_guard = true;
446 hw->hw_info.buffer_share_bit = 0;
448 memset((void *)¶m, 0, sizeof(param));
450 param.req_len = hw->hw_info.req_buf_size;
451 param.req_start = __pa(hw->hw_info.req_buf);
452 param.res_len = hw->hw_info.res_buf_size;
453 param.res_start = __pa(hw->hw_info.res_buf);
454 param.share_start = __pa(hw->hw_info.share->ep_status);
456 fjes_hw_init_command_registers(hw, ¶m);
460 static void fjes_tx_stall_task(struct work_struct *work)
462 struct fjes_adapter *adapter = container_of(work,
463 struct fjes_adapter, tx_stall_task);
464 struct net_device *netdev = adapter->netdev;
465 struct fjes_hw *hw = &adapter->hw;
466 int all_queue_available, sendable;
467 enum ep_partner_status pstatus;
468 int max_epid, my_epid, epid;
469 union ep_buffer_info *info;
473 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
474 netif_wake_queue(netdev);
478 my_epid = hw->my_epid;
479 max_epid = hw->max_epid;
481 for (i = 0; i < 5; i++) {
482 all_queue_available = 1;
484 for (epid = 0; epid < max_epid; epid++) {
488 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
489 sendable = (pstatus == EP_PARTNER_SHARED);
493 info = adapter->hw.ep_shm_info[epid].tx.info;
495 if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
498 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
499 info->v1i.count_max)) {
500 all_queue_available = 0;
505 if (all_queue_available) {
506 netif_wake_queue(netdev);
511 usleep_range(50, 100);
513 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
516 static void fjes_force_close_task(struct work_struct *work)
518 struct fjes_adapter *adapter = container_of(work,
519 struct fjes_adapter, force_close_task);
520 struct net_device *netdev = adapter->netdev;
527 static void fjes_raise_intr_rxdata_task(struct work_struct *work)
529 struct fjes_adapter *adapter = container_of(work,
530 struct fjes_adapter, raise_intr_rxdata_task);
531 struct fjes_hw *hw = &adapter->hw;
532 enum ep_partner_status pstatus;
533 int max_epid, my_epid, epid;
535 my_epid = hw->my_epid;
536 max_epid = hw->max_epid;
538 for (epid = 0; epid < max_epid; epid++)
539 hw->ep_shm_info[epid].tx_status_work = 0;
541 for (epid = 0; epid < max_epid; epid++) {
545 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
546 if (pstatus == EP_PARTNER_SHARED) {
547 hw->ep_shm_info[epid].tx_status_work =
548 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
550 if (hw->ep_shm_info[epid].tx_status_work ==
551 FJES_TX_DELAY_SEND_PENDING) {
552 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
553 FJES_TX_DELAY_SEND_NONE;
558 for (epid = 0; epid < max_epid; epid++) {
562 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
563 if ((hw->ep_shm_info[epid].tx_status_work ==
564 FJES_TX_DELAY_SEND_PENDING) &&
565 (pstatus == EP_PARTNER_SHARED) &&
566 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
567 FJES_RX_POLL_WORK)) {
568 fjes_hw_raise_interrupt(hw, epid,
569 REG_ICTL_MASK_RX_DATA);
573 usleep_range(500, 1000);
576 static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
577 void *data, size_t len)
581 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
586 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
587 FJES_TX_DELAY_SEND_PENDING;
588 if (!work_pending(&adapter->raise_intr_rxdata_task))
589 queue_work(adapter->txrx_wq,
590 &adapter->raise_intr_rxdata_task);
597 fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
599 struct fjes_adapter *adapter = netdev_priv(netdev);
600 struct fjes_hw *hw = &adapter->hw;
602 int max_epid, my_epid, dest_epid;
603 enum ep_partner_status pstatus;
604 struct netdev_queue *cur_queue;
605 char shortpkt[VLAN_ETH_HLEN];
616 cur_queue = netdev_get_tx_queue(netdev, queue_no);
618 eth = (struct ethhdr *)skb->data;
619 my_epid = hw->my_epid;
621 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
626 if (is_multicast_ether_addr(eth->h_dest)) {
628 max_epid = hw->max_epid;
630 } else if (is_local_ether_addr(eth->h_dest)) {
631 dest_epid = eth->h_dest[ETH_ALEN - 1];
632 max_epid = dest_epid + 1;
634 if ((eth->h_dest[0] == 0x02) &&
635 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
636 eth->h_dest[3] | eth->h_dest[4])) &&
637 (dest_epid < hw->max_epid)) {
644 adapter->stats64.tx_packets += 1;
645 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
646 adapter->stats64.tx_bytes += len;
647 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
654 adapter->stats64.tx_packets += 1;
655 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
656 adapter->stats64.tx_bytes += len;
657 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
660 for (; dest_epid < max_epid; dest_epid++) {
661 if (my_epid == dest_epid)
664 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
665 if (pstatus != EP_PARTNER_SHARED) {
667 } else if (!fjes_hw_check_epbuf_version(
668 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
669 /* version is NOT 0 */
670 adapter->stats64.tx_carrier_errors += 1;
671 hw->ep_shm_info[dest_epid].net_stats
672 .tx_carrier_errors += 1;
675 } else if (!fjes_hw_check_mtu(
676 &adapter->hw.ep_shm_info[dest_epid].rx,
678 adapter->stats64.tx_dropped += 1;
679 hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
680 adapter->stats64.tx_errors += 1;
681 hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
685 !fjes_hw_check_vlan_id(
686 &adapter->hw.ep_shm_info[dest_epid].rx,
690 if (len < VLAN_ETH_HLEN) {
691 memset(shortpkt, 0, VLAN_ETH_HLEN);
692 memcpy(shortpkt, skb->data, skb->len);
697 if (adapter->tx_retry_count == 0) {
698 adapter->tx_start_jiffies = jiffies;
699 adapter->tx_retry_count = 1;
701 adapter->tx_retry_count++;
704 if (fjes_tx_send(adapter, dest_epid, data, len)) {
709 (long)adapter->tx_start_jiffies) >=
710 FJES_TX_RETRY_TIMEOUT) {
711 adapter->stats64.tx_fifo_errors += 1;
712 hw->ep_shm_info[dest_epid].net_stats
713 .tx_fifo_errors += 1;
714 adapter->stats64.tx_errors += 1;
715 hw->ep_shm_info[dest_epid].net_stats
720 netif_trans_update(netdev);
721 netif_tx_stop_queue(cur_queue);
723 if (!work_pending(&adapter->tx_stall_task))
724 queue_work(adapter->txrx_wq,
725 &adapter->tx_stall_task);
727 ret = NETDEV_TX_BUSY;
731 adapter->stats64.tx_packets += 1;
732 hw->ep_shm_info[dest_epid].net_stats
734 adapter->stats64.tx_bytes += len;
735 hw->ep_shm_info[dest_epid].net_stats
739 adapter->tx_retry_count = 0;
745 if (ret == NETDEV_TX_OK) {
748 adapter->stats64.tx_packets += 1;
749 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
750 adapter->stats64.tx_bytes += 1;
751 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
758 static void fjes_tx_retry(struct net_device *netdev)
760 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
762 netif_tx_wake_queue(queue);
765 static struct rtnl_link_stats64 *
766 fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
768 struct fjes_adapter *adapter = netdev_priv(netdev);
770 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
775 static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
777 struct fjes_adapter *adapter = netdev_priv(netdev);
778 bool running = netif_running(netdev);
779 struct fjes_hw *hw = &adapter->hw;
784 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
785 if (new_mtu <= fjes_support_mtu[idx]) {
786 new_mtu = fjes_support_mtu[idx];
787 if (new_mtu == netdev->mtu)
799 spin_lock_irqsave(&hw->rx_status_lock, flags);
800 for (epidx = 0; epidx < hw->max_epid; epidx++) {
801 if (epidx == hw->my_epid)
803 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
804 ~FJES_RX_MTU_CHANGING_DONE;
806 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
808 netif_tx_stop_all_queues(netdev);
809 netif_carrier_off(netdev);
810 cancel_work_sync(&adapter->tx_stall_task);
811 napi_disable(&adapter->napi);
815 netif_tx_stop_all_queues(netdev);
818 netdev->mtu = new_mtu;
821 for (epidx = 0; epidx < hw->max_epid; epidx++) {
822 if (epidx == hw->my_epid)
825 spin_lock_irqsave(&hw->rx_status_lock, flags);
826 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
830 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
831 FJES_RX_MTU_CHANGING_DONE;
832 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
835 netif_tx_wake_all_queues(netdev);
836 netif_carrier_on(netdev);
837 napi_enable(&adapter->napi);
838 napi_schedule(&adapter->napi);
844 static int fjes_vlan_rx_add_vid(struct net_device *netdev,
845 __be16 proto, u16 vid)
847 struct fjes_adapter *adapter = netdev_priv(netdev);
851 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
852 if (epid == adapter->hw.my_epid)
855 if (!fjes_hw_check_vlan_id(
856 &adapter->hw.ep_shm_info[epid].tx, vid))
857 ret = fjes_hw_set_vlan_id(
858 &adapter->hw.ep_shm_info[epid].tx, vid);
861 return ret ? 0 : -ENOSPC;
864 static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
865 __be16 proto, u16 vid)
867 struct fjes_adapter *adapter = netdev_priv(netdev);
870 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
871 if (epid == adapter->hw.my_epid)
874 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
880 static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
883 struct fjes_hw *hw = &adapter->hw;
884 enum ep_partner_status status;
887 status = fjes_hw_get_partner_ep_status(hw, src_epid);
889 case EP_PARTNER_UNSHARE:
890 case EP_PARTNER_COMPLETE:
893 case EP_PARTNER_WAITING:
894 if (src_epid < hw->my_epid) {
895 spin_lock_irqsave(&hw->rx_status_lock, flags);
896 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
897 FJES_RX_STOP_REQ_DONE;
898 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
900 clear_bit(src_epid, &hw->txrx_stop_req_bit);
901 set_bit(src_epid, &adapter->unshare_watch_bitmask);
903 if (!work_pending(&adapter->unshare_watch_task))
904 queue_work(adapter->control_wq,
905 &adapter->unshare_watch_task);
908 case EP_PARTNER_SHARED:
909 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
910 FJES_RX_STOP_REQ_REQUEST) {
911 set_bit(src_epid, &hw->epstop_req_bit);
912 if (!work_pending(&hw->epstop_task))
913 queue_work(adapter->control_wq,
920 static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
922 struct fjes_hw *hw = &adapter->hw;
923 enum ep_partner_status status;
926 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
928 status = fjes_hw_get_partner_ep_status(hw, src_epid);
930 case EP_PARTNER_WAITING:
931 spin_lock_irqsave(&hw->rx_status_lock, flags);
932 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
933 FJES_RX_STOP_REQ_DONE;
934 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
935 clear_bit(src_epid, &hw->txrx_stop_req_bit);
937 case EP_PARTNER_UNSHARE:
938 case EP_PARTNER_COMPLETE:
940 set_bit(src_epid, &adapter->unshare_watch_bitmask);
941 if (!work_pending(&adapter->unshare_watch_task))
942 queue_work(adapter->control_wq,
943 &adapter->unshare_watch_task);
945 case EP_PARTNER_SHARED:
946 set_bit(src_epid, &hw->epstop_req_bit);
948 if (!work_pending(&hw->epstop_task))
949 queue_work(adapter->control_wq, &hw->epstop_task);
954 static void fjes_update_zone_irq(struct fjes_adapter *adapter,
957 struct fjes_hw *hw = &adapter->hw;
959 if (!work_pending(&hw->update_zone_task))
960 queue_work(adapter->control_wq, &hw->update_zone_task);
963 static irqreturn_t fjes_intr(int irq, void *data)
965 struct fjes_adapter *adapter = data;
966 struct fjes_hw *hw = &adapter->hw;
970 icr = fjes_hw_capture_interrupt_status(hw);
972 if (icr & REG_IS_MASK_IS_ASSERT) {
973 if (icr & REG_ICTL_MASK_RX_DATA)
974 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
976 if (icr & REG_ICTL_MASK_DEV_STOP_REQ)
977 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
979 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ)
980 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
982 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
983 fjes_hw_set_irqmask(hw,
984 REG_ICTL_MASK_TXRX_STOP_DONE, true);
986 if (icr & REG_ICTL_MASK_INFO_UPDATE)
987 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
997 static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
1000 struct fjes_hw *hw = &adapter->hw;
1001 enum ep_partner_status pstatus;
1002 int max_epid, cur_epid;
1005 max_epid = hw->max_epid;
1006 start_epid = (start_epid + 1 + max_epid) % max_epid;
1008 for (i = 0; i < max_epid; i++) {
1009 cur_epid = (start_epid + i) % max_epid;
1010 if (cur_epid == hw->my_epid)
1013 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
1014 if (pstatus == EP_PARTNER_SHARED) {
1015 if (!fjes_hw_epbuf_rx_is_empty(
1016 &hw->ep_shm_info[cur_epid].rx))
1023 static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
1028 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
1033 fjes_hw_epbuf_rx_curpkt_get_addr(
1034 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
1039 static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
1041 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
1044 static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
1046 struct fjes_hw *hw = &adapter->hw;
1048 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
1050 adapter->unset_rx_last = true;
1051 napi_schedule(&adapter->napi);
1054 static int fjes_poll(struct napi_struct *napi, int budget)
1056 struct fjes_adapter *adapter =
1057 container_of(napi, struct fjes_adapter, napi);
1058 struct net_device *netdev = napi->dev;
1059 struct fjes_hw *hw = &adapter->hw;
1060 struct sk_buff *skb;
1067 spin_lock(&hw->rx_status_lock);
1068 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1069 if (epidx == hw->my_epid)
1072 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1074 adapter->hw.ep_shm_info[epidx]
1075 .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
1077 spin_unlock(&hw->rx_status_lock);
1079 while (work_done < budget) {
1080 prefetch(&adapter->hw);
1081 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
1084 skb = napi_alloc_skb(napi, frame_len);
1086 adapter->stats64.rx_dropped += 1;
1087 hw->ep_shm_info[cur_epid].net_stats
1089 adapter->stats64.rx_errors += 1;
1090 hw->ep_shm_info[cur_epid].net_stats
1093 memcpy(skb_put(skb, frame_len),
1095 skb->protocol = eth_type_trans(skb, netdev);
1096 skb->ip_summed = CHECKSUM_UNNECESSARY;
1098 netif_receive_skb(skb);
1102 adapter->stats64.rx_packets += 1;
1103 hw->ep_shm_info[cur_epid].net_stats
1105 adapter->stats64.rx_bytes += frame_len;
1106 hw->ep_shm_info[cur_epid].net_stats
1107 .rx_bytes += frame_len;
1109 if (is_multicast_ether_addr(
1110 ((struct ethhdr *)frame)->h_dest)) {
1111 adapter->stats64.multicast += 1;
1112 hw->ep_shm_info[cur_epid].net_stats
1117 fjes_rxframe_release(adapter, cur_epid);
1118 adapter->unset_rx_last = true;
1124 if (work_done < budget) {
1125 napi_complete(napi);
1127 if (adapter->unset_rx_last) {
1128 adapter->rx_last_jiffies = jiffies;
1129 adapter->unset_rx_last = false;
1132 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1133 napi_reschedule(napi);
1135 spin_lock(&hw->rx_status_lock);
1136 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1137 if (epidx == hw->my_epid)
1139 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1141 adapter->hw.ep_shm_info[epidx].tx
1142 .info->v1i.rx_status &=
1145 spin_unlock(&hw->rx_status_lock);
1147 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1154 /* fjes_probe - Device Initialization Routine */
1155 static int fjes_probe(struct platform_device *plat_dev)
1157 struct fjes_adapter *adapter;
1158 struct net_device *netdev;
1159 struct resource *res;
1164 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1165 NET_NAME_UNKNOWN, fjes_netdev_setup,
1171 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1173 dev_set_drvdata(&plat_dev->dev, netdev);
1174 adapter = netdev_priv(netdev);
1175 adapter->netdev = netdev;
1176 adapter->plat_dev = plat_dev;
1180 /* setup the private structure */
1181 err = fjes_sw_init(adapter);
1183 goto err_free_netdev;
1185 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1186 adapter->force_reset = false;
1187 adapter->open_guard = false;
1189 adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1190 adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1193 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1194 INIT_WORK(&adapter->raise_intr_rxdata_task,
1195 fjes_raise_intr_rxdata_task);
1196 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1197 adapter->unshare_watch_bitmask = 0;
1199 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1200 adapter->interrupt_watch_enable = false;
1202 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1203 hw->hw_res.start = res->start;
1204 hw->hw_res.size = resource_size(res);
1205 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1206 err = fjes_hw_init(&adapter->hw);
1208 goto err_free_netdev;
1210 /* setup MAC address (02:00:00:00:00:[epid])*/
1211 netdev->dev_addr[0] = 2;
1212 netdev->dev_addr[1] = 0;
1213 netdev->dev_addr[2] = 0;
1214 netdev->dev_addr[3] = 0;
1215 netdev->dev_addr[4] = 0;
1216 netdev->dev_addr[5] = hw->my_epid; /* EPID */
1218 err = register_netdev(netdev);
1222 netif_carrier_off(netdev);
1227 fjes_hw_exit(&adapter->hw);
1229 free_netdev(netdev);
1234 /* fjes_remove - Device Removal Routine */
1235 static int fjes_remove(struct platform_device *plat_dev)
1237 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1238 struct fjes_adapter *adapter = netdev_priv(netdev);
1239 struct fjes_hw *hw = &adapter->hw;
1241 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1242 cancel_work_sync(&adapter->unshare_watch_task);
1243 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1244 cancel_work_sync(&adapter->tx_stall_task);
1245 if (adapter->control_wq)
1246 destroy_workqueue(adapter->control_wq);
1247 if (adapter->txrx_wq)
1248 destroy_workqueue(adapter->txrx_wq);
1250 unregister_netdev(netdev);
1254 netif_napi_del(&adapter->napi);
1256 free_netdev(netdev);
1261 static int fjes_sw_init(struct fjes_adapter *adapter)
1263 struct net_device *netdev = adapter->netdev;
1265 netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);
1270 /* fjes_netdev_setup - netdevice initialization routine */
1271 static void fjes_netdev_setup(struct net_device *netdev)
1273 ether_setup(netdev);
1275 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
1276 netdev->netdev_ops = &fjes_netdev_ops;
1277 fjes_set_ethtool_ops(netdev);
1278 netdev->mtu = fjes_support_mtu[3];
1279 netdev->flags |= IFF_BROADCAST;
1280 netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER;
1283 static void fjes_irq_watch_task(struct work_struct *work)
1285 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1286 struct fjes_adapter, interrupt_watch_task);
1288 local_irq_disable();
1289 fjes_intr(adapter->hw.hw_res.irq, adapter);
1292 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1293 napi_schedule(&adapter->napi);
1295 if (adapter->interrupt_watch_enable) {
1296 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1297 queue_delayed_work(adapter->control_wq,
1298 &adapter->interrupt_watch_task,
1299 FJES_IRQ_WATCH_DELAY);
1303 static void fjes_watch_unshare_task(struct work_struct *work)
1305 struct fjes_adapter *adapter =
1306 container_of(work, struct fjes_adapter, unshare_watch_task);
1308 struct net_device *netdev = adapter->netdev;
1309 struct fjes_hw *hw = &adapter->hw;
1311 int unshare_watch, unshare_reserve;
1312 int max_epid, my_epid, epidx;
1313 int stop_req, stop_req_done;
1314 ulong unshare_watch_bitmask;
1315 unsigned long flags;
1320 my_epid = hw->my_epid;
1321 max_epid = hw->max_epid;
1323 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1324 adapter->unshare_watch_bitmask = 0;
1326 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1327 (wait_time < 3000)) {
1328 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1329 if (epidx == hw->my_epid)
1332 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1335 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1337 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1338 FJES_RX_STOP_REQ_DONE;
1340 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1342 unshare_reserve = test_bit(epidx,
1343 &hw->hw_info.buffer_unshare_reserve_bit);
1346 (is_shared && (!is_shared || !stop_req_done))) &&
1347 (is_shared || !unshare_watch || !unshare_reserve))
1350 mutex_lock(&hw->hw_info.lock);
1351 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1359 &adapter->force_close_task)) {
1360 adapter->force_reset = true;
1362 &adapter->force_close_task);
1366 mutex_unlock(&hw->hw_info.lock);
1368 spin_lock_irqsave(&hw->rx_status_lock, flags);
1369 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1370 netdev->dev_addr, netdev->mtu);
1371 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1373 clear_bit(epidx, &hw->txrx_stop_req_bit);
1374 clear_bit(epidx, &unshare_watch_bitmask);
1376 &hw->hw_info.buffer_unshare_reserve_bit);
1383 if (hw->hw_info.buffer_unshare_reserve_bit) {
1384 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1385 if (epidx == hw->my_epid)
1389 &hw->hw_info.buffer_unshare_reserve_bit)) {
1390 mutex_lock(&hw->hw_info.lock);
1392 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1400 &adapter->force_close_task)) {
1401 adapter->force_reset = true;
1403 &adapter->force_close_task);
1407 mutex_unlock(&hw->hw_info.lock);
1409 spin_lock_irqsave(&hw->rx_status_lock, flags);
1410 fjes_hw_setup_epbuf(
1411 &hw->ep_shm_info[epidx].tx,
1412 netdev->dev_addr, netdev->mtu);
1413 spin_unlock_irqrestore(&hw->rx_status_lock,
1416 clear_bit(epidx, &hw->txrx_stop_req_bit);
1417 clear_bit(epidx, &unshare_watch_bitmask);
1418 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1421 if (test_bit(epidx, &unshare_watch_bitmask)) {
1422 spin_lock_irqsave(&hw->rx_status_lock, flags);
1423 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1424 ~FJES_RX_STOP_REQ_DONE;
1425 spin_unlock_irqrestore(&hw->rx_status_lock,
1432 /* fjes_init_module - Driver Registration Routine */
1433 static int __init fjes_init_module(void)
1437 pr_info("%s - version %s - %s\n",
1438 fjes_driver_string, fjes_driver_version, fjes_copyright);
1440 result = platform_driver_register(&fjes_driver);
1444 result = acpi_bus_register_driver(&fjes_acpi_driver);
1446 goto fail_acpi_driver;
1451 platform_driver_unregister(&fjes_driver);
1455 module_init(fjes_init_module);
1457 /* fjes_exit_module - Driver Exit Cleanup Routine */
1458 static void __exit fjes_exit_module(void)
1460 acpi_bus_unregister_driver(&fjes_acpi_driver);
1461 platform_driver_unregister(&fjes_driver);
1464 module_exit(fjes_exit_module);