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 = {
100 .owner = THIS_MODULE,
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 if (IS_ERR(plat_dev))
153 return PTR_ERR(plat_dev);
155 device->driver_data = plat_dev;
160 static int fjes_acpi_remove(struct acpi_device *device)
162 struct platform_device *plat_dev;
164 plat_dev = (struct platform_device *)acpi_driver_data(device);
165 platform_device_unregister(plat_dev);
171 fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
173 struct acpi_resource_address32 *addr;
174 struct acpi_resource_irq *irq;
175 struct resource *res = data;
177 switch (acpi_res->type) {
178 case ACPI_RESOURCE_TYPE_ADDRESS32:
179 addr = &acpi_res->data.address32;
180 res[0].start = addr->address.minimum;
181 res[0].end = addr->address.minimum +
182 addr->address.address_length - 1;
185 case ACPI_RESOURCE_TYPE_IRQ:
186 irq = &acpi_res->data.irq;
187 if (irq->interrupt_count != 1)
189 res[1].start = irq->interrupts[0];
190 res[1].end = irq->interrupts[0];
200 static int fjes_request_irq(struct fjes_adapter *adapter)
202 struct net_device *netdev = adapter->netdev;
205 adapter->interrupt_watch_enable = true;
206 if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
207 queue_delayed_work(adapter->control_wq,
208 &adapter->interrupt_watch_task,
209 FJES_IRQ_WATCH_DELAY);
212 if (!adapter->irq_registered) {
213 result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
214 IRQF_SHARED, netdev->name, adapter);
216 adapter->irq_registered = false;
218 adapter->irq_registered = true;
224 static void fjes_free_irq(struct fjes_adapter *adapter)
226 struct fjes_hw *hw = &adapter->hw;
228 adapter->interrupt_watch_enable = false;
229 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
231 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
233 if (adapter->irq_registered) {
234 free_irq(adapter->hw.hw_res.irq, adapter);
235 adapter->irq_registered = false;
239 static const struct net_device_ops fjes_netdev_ops = {
240 .ndo_open = fjes_open,
241 .ndo_stop = fjes_close,
242 .ndo_start_xmit = fjes_xmit_frame,
243 .ndo_get_stats64 = fjes_get_stats64,
244 .ndo_change_mtu = fjes_change_mtu,
245 .ndo_tx_timeout = fjes_tx_retry,
246 .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid,
247 .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
250 /* fjes_open - Called when a network interface is made active */
251 static int fjes_open(struct net_device *netdev)
253 struct fjes_adapter *adapter = netdev_priv(netdev);
254 struct fjes_hw *hw = &adapter->hw;
257 if (adapter->open_guard)
260 result = fjes_setup_resources(adapter);
264 hw->txrx_stop_req_bit = 0;
265 hw->epstop_req_bit = 0;
267 napi_enable(&adapter->napi);
269 fjes_hw_capture_interrupt_status(hw);
271 result = fjes_request_irq(adapter);
275 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
277 netif_tx_start_all_queues(netdev);
278 netif_carrier_on(netdev);
283 fjes_free_irq(adapter);
284 napi_disable(&adapter->napi);
287 fjes_free_resources(adapter);
291 /* fjes_close - Disables a network interface */
292 static int fjes_close(struct net_device *netdev)
294 struct fjes_adapter *adapter = netdev_priv(netdev);
295 struct fjes_hw *hw = &adapter->hw;
298 netif_tx_stop_all_queues(netdev);
299 netif_carrier_off(netdev);
301 fjes_hw_raise_epstop(hw);
303 napi_disable(&adapter->napi);
305 for (epidx = 0; epidx < hw->max_epid; epidx++) {
306 if (epidx == hw->my_epid)
309 adapter->hw.ep_shm_info[epidx].tx.info->v1i.rx_status &=
313 fjes_free_irq(adapter);
315 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
316 cancel_work_sync(&adapter->unshare_watch_task);
317 adapter->unshare_watch_bitmask = 0;
318 cancel_work_sync(&adapter->raise_intr_rxdata_task);
319 cancel_work_sync(&adapter->tx_stall_task);
321 cancel_work_sync(&hw->update_zone_task);
322 cancel_work_sync(&hw->epstop_task);
324 fjes_hw_wait_epstop(hw);
326 fjes_free_resources(adapter);
331 static int fjes_setup_resources(struct fjes_adapter *adapter)
333 struct net_device *netdev = adapter->netdev;
334 struct ep_share_mem_info *buf_pair;
335 struct fjes_hw *hw = &adapter->hw;
339 mutex_lock(&hw->hw_info.lock);
340 result = fjes_hw_request_info(hw);
343 for (epidx = 0; epidx < hw->max_epid; epidx++) {
344 hw->ep_shm_info[epidx].es_status =
345 hw->hw_info.res_buf->info.info[epidx].es_status;
346 hw->ep_shm_info[epidx].zone =
347 hw->hw_info.res_buf->info.info[epidx].zone;
353 adapter->force_reset = true;
355 mutex_unlock(&hw->hw_info.lock);
358 mutex_unlock(&hw->hw_info.lock);
360 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
361 if ((epidx != hw->my_epid) &&
362 (hw->ep_shm_info[epidx].es_status ==
363 FJES_ZONING_STATUS_ENABLE)) {
364 fjes_hw_raise_interrupt(hw, epidx,
365 REG_ICTL_MASK_INFO_UPDATE);
369 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
371 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
372 if (epidx == hw->my_epid)
375 buf_pair = &hw->ep_shm_info[epidx];
377 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
380 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
381 mutex_lock(&hw->hw_info.lock);
383 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
384 mutex_unlock(&hw->hw_info.lock);
392 adapter->force_reset = true;
401 static void fjes_free_resources(struct fjes_adapter *adapter)
403 struct net_device *netdev = adapter->netdev;
404 struct fjes_device_command_param param;
405 struct ep_share_mem_info *buf_pair;
406 struct fjes_hw *hw = &adapter->hw;
407 bool reset_flag = false;
411 for (epidx = 0; epidx < hw->max_epid; epidx++) {
412 if (epidx == hw->my_epid)
415 mutex_lock(&hw->hw_info.lock);
416 result = fjes_hw_unregister_buff_addr(hw, epidx);
417 mutex_unlock(&hw->hw_info.lock);
422 buf_pair = &hw->ep_shm_info[epidx];
424 fjes_hw_setup_epbuf(&buf_pair->tx,
425 netdev->dev_addr, netdev->mtu);
427 clear_bit(epidx, &hw->txrx_stop_req_bit);
430 if (reset_flag || adapter->force_reset) {
431 result = fjes_hw_reset(hw);
433 adapter->force_reset = false;
436 adapter->open_guard = true;
438 hw->hw_info.buffer_share_bit = 0;
440 memset((void *)¶m, 0, sizeof(param));
442 param.req_len = hw->hw_info.req_buf_size;
443 param.req_start = __pa(hw->hw_info.req_buf);
444 param.res_len = hw->hw_info.res_buf_size;
445 param.res_start = __pa(hw->hw_info.res_buf);
446 param.share_start = __pa(hw->hw_info.share->ep_status);
448 fjes_hw_init_command_registers(hw, ¶m);
452 static void fjes_tx_stall_task(struct work_struct *work)
454 struct fjes_adapter *adapter = container_of(work,
455 struct fjes_adapter, tx_stall_task);
456 struct net_device *netdev = adapter->netdev;
457 struct fjes_hw *hw = &adapter->hw;
458 int all_queue_available, sendable;
459 enum ep_partner_status pstatus;
460 int max_epid, my_epid, epid;
461 union ep_buffer_info *info;
465 (long)(netdev->trans_start)) > FJES_TX_TX_STALL_TIMEOUT) {
466 netif_wake_queue(netdev);
470 my_epid = hw->my_epid;
471 max_epid = hw->max_epid;
473 for (i = 0; i < 5; i++) {
474 all_queue_available = 1;
476 for (epid = 0; epid < max_epid; epid++) {
480 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
481 sendable = (pstatus == EP_PARTNER_SHARED);
485 info = adapter->hw.ep_shm_info[epid].tx.info;
487 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
488 info->v1i.count_max)) {
489 all_queue_available = 0;
494 if (all_queue_available) {
495 netif_wake_queue(netdev);
500 usleep_range(50, 100);
502 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
505 static void fjes_force_close_task(struct work_struct *work)
507 struct fjes_adapter *adapter = container_of(work,
508 struct fjes_adapter, force_close_task);
509 struct net_device *netdev = adapter->netdev;
516 static void fjes_raise_intr_rxdata_task(struct work_struct *work)
518 struct fjes_adapter *adapter = container_of(work,
519 struct fjes_adapter, raise_intr_rxdata_task);
520 struct fjes_hw *hw = &adapter->hw;
521 enum ep_partner_status pstatus;
522 int max_epid, my_epid, epid;
524 my_epid = hw->my_epid;
525 max_epid = hw->max_epid;
527 for (epid = 0; epid < max_epid; epid++)
528 hw->ep_shm_info[epid].tx_status_work = 0;
530 for (epid = 0; epid < max_epid; epid++) {
534 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
535 if (pstatus == EP_PARTNER_SHARED) {
536 hw->ep_shm_info[epid].tx_status_work =
537 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
539 if (hw->ep_shm_info[epid].tx_status_work ==
540 FJES_TX_DELAY_SEND_PENDING) {
541 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
542 FJES_TX_DELAY_SEND_NONE;
547 for (epid = 0; epid < max_epid; epid++) {
551 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
552 if ((hw->ep_shm_info[epid].tx_status_work ==
553 FJES_TX_DELAY_SEND_PENDING) &&
554 (pstatus == EP_PARTNER_SHARED) &&
555 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status)) {
556 fjes_hw_raise_interrupt(hw, epid,
557 REG_ICTL_MASK_RX_DATA);
561 usleep_range(500, 1000);
564 static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
565 void *data, size_t len)
569 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
574 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
575 FJES_TX_DELAY_SEND_PENDING;
576 if (!work_pending(&adapter->raise_intr_rxdata_task))
577 queue_work(adapter->txrx_wq,
578 &adapter->raise_intr_rxdata_task);
585 fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
587 struct fjes_adapter *adapter = netdev_priv(netdev);
588 struct fjes_hw *hw = &adapter->hw;
590 int max_epid, my_epid, dest_epid;
591 enum ep_partner_status pstatus;
592 struct netdev_queue *cur_queue;
593 char shortpkt[VLAN_ETH_HLEN];
604 cur_queue = netdev_get_tx_queue(netdev, queue_no);
606 eth = (struct ethhdr *)skb->data;
607 my_epid = hw->my_epid;
609 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
614 if (is_multicast_ether_addr(eth->h_dest)) {
616 max_epid = hw->max_epid;
618 } else if (is_local_ether_addr(eth->h_dest)) {
619 dest_epid = eth->h_dest[ETH_ALEN - 1];
620 max_epid = dest_epid + 1;
622 if ((eth->h_dest[0] == 0x02) &&
623 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
624 eth->h_dest[3] | eth->h_dest[4])) &&
625 (dest_epid < hw->max_epid)) {
632 adapter->stats64.tx_packets += 1;
633 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
634 adapter->stats64.tx_bytes += len;
635 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
642 adapter->stats64.tx_packets += 1;
643 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
644 adapter->stats64.tx_bytes += len;
645 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
648 for (; dest_epid < max_epid; dest_epid++) {
649 if (my_epid == dest_epid)
652 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
653 if (pstatus != EP_PARTNER_SHARED) {
655 } else if (!fjes_hw_check_epbuf_version(
656 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
657 /* version is NOT 0 */
658 adapter->stats64.tx_carrier_errors += 1;
659 hw->ep_shm_info[my_epid].net_stats
660 .tx_carrier_errors += 1;
663 } else if (!fjes_hw_check_mtu(
664 &adapter->hw.ep_shm_info[dest_epid].rx,
666 adapter->stats64.tx_dropped += 1;
667 hw->ep_shm_info[my_epid].net_stats.tx_dropped += 1;
668 adapter->stats64.tx_errors += 1;
669 hw->ep_shm_info[my_epid].net_stats.tx_errors += 1;
673 !fjes_hw_check_vlan_id(
674 &adapter->hw.ep_shm_info[dest_epid].rx,
678 if (len < VLAN_ETH_HLEN) {
679 memset(shortpkt, 0, VLAN_ETH_HLEN);
680 memcpy(shortpkt, skb->data, skb->len);
685 if (adapter->tx_retry_count == 0) {
686 adapter->tx_start_jiffies = jiffies;
687 adapter->tx_retry_count = 1;
689 adapter->tx_retry_count++;
692 if (fjes_tx_send(adapter, dest_epid, data, len)) {
697 (long)adapter->tx_start_jiffies) >=
698 FJES_TX_RETRY_TIMEOUT) {
699 adapter->stats64.tx_fifo_errors += 1;
700 hw->ep_shm_info[my_epid].net_stats
701 .tx_fifo_errors += 1;
702 adapter->stats64.tx_errors += 1;
703 hw->ep_shm_info[my_epid].net_stats
708 netdev->trans_start = jiffies;
709 netif_tx_stop_queue(cur_queue);
711 if (!work_pending(&adapter->tx_stall_task))
712 queue_work(adapter->txrx_wq,
713 &adapter->tx_stall_task);
715 ret = NETDEV_TX_BUSY;
719 adapter->stats64.tx_packets += 1;
720 hw->ep_shm_info[my_epid].net_stats
722 adapter->stats64.tx_bytes += len;
723 hw->ep_shm_info[my_epid].net_stats
727 adapter->tx_retry_count = 0;
733 if (ret == NETDEV_TX_OK) {
736 adapter->stats64.tx_packets += 1;
737 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
738 adapter->stats64.tx_bytes += 1;
739 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
746 static void fjes_tx_retry(struct net_device *netdev)
748 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
750 netif_tx_wake_queue(queue);
753 static struct rtnl_link_stats64 *
754 fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
756 struct fjes_adapter *adapter = netdev_priv(netdev);
758 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
763 static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
765 bool running = netif_running(netdev);
769 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
770 if (new_mtu <= fjes_support_mtu[idx]) {
771 new_mtu = fjes_support_mtu[idx];
772 if (new_mtu == netdev->mtu)
778 netdev->mtu = new_mtu;
781 ret = fjes_open(netdev);
790 static int fjes_vlan_rx_add_vid(struct net_device *netdev,
791 __be16 proto, u16 vid)
793 struct fjes_adapter *adapter = netdev_priv(netdev);
797 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
798 if (epid == adapter->hw.my_epid)
801 if (!fjes_hw_check_vlan_id(
802 &adapter->hw.ep_shm_info[epid].tx, vid))
803 ret = fjes_hw_set_vlan_id(
804 &adapter->hw.ep_shm_info[epid].tx, vid);
807 return ret ? 0 : -ENOSPC;
810 static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
811 __be16 proto, u16 vid)
813 struct fjes_adapter *adapter = netdev_priv(netdev);
816 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
817 if (epid == adapter->hw.my_epid)
820 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
826 static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
829 struct fjes_hw *hw = &adapter->hw;
830 enum ep_partner_status status;
832 status = fjes_hw_get_partner_ep_status(hw, src_epid);
834 case EP_PARTNER_UNSHARE:
835 case EP_PARTNER_COMPLETE:
838 case EP_PARTNER_WAITING:
839 if (src_epid < hw->my_epid) {
840 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
841 FJES_RX_STOP_REQ_DONE;
843 clear_bit(src_epid, &hw->txrx_stop_req_bit);
844 set_bit(src_epid, &adapter->unshare_watch_bitmask);
846 if (!work_pending(&adapter->unshare_watch_task))
847 queue_work(adapter->control_wq,
848 &adapter->unshare_watch_task);
851 case EP_PARTNER_SHARED:
852 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
853 FJES_RX_STOP_REQ_REQUEST) {
854 set_bit(src_epid, &hw->epstop_req_bit);
855 if (!work_pending(&hw->epstop_task))
856 queue_work(adapter->control_wq,
863 static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
865 struct fjes_hw *hw = &adapter->hw;
866 enum ep_partner_status status;
868 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
870 status = fjes_hw_get_partner_ep_status(hw, src_epid);
872 case EP_PARTNER_WAITING:
873 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
874 FJES_RX_STOP_REQ_DONE;
875 clear_bit(src_epid, &hw->txrx_stop_req_bit);
877 case EP_PARTNER_UNSHARE:
878 case EP_PARTNER_COMPLETE:
880 set_bit(src_epid, &adapter->unshare_watch_bitmask);
881 if (!work_pending(&adapter->unshare_watch_task))
882 queue_work(adapter->control_wq,
883 &adapter->unshare_watch_task);
885 case EP_PARTNER_SHARED:
886 set_bit(src_epid, &hw->epstop_req_bit);
888 if (!work_pending(&hw->epstop_task))
889 queue_work(adapter->control_wq, &hw->epstop_task);
894 static void fjes_update_zone_irq(struct fjes_adapter *adapter,
897 struct fjes_hw *hw = &adapter->hw;
899 if (!work_pending(&hw->update_zone_task))
900 queue_work(adapter->control_wq, &hw->update_zone_task);
903 static irqreturn_t fjes_intr(int irq, void *data)
905 struct fjes_adapter *adapter = data;
906 struct fjes_hw *hw = &adapter->hw;
910 icr = fjes_hw_capture_interrupt_status(hw);
912 if (icr & REG_IS_MASK_IS_ASSERT) {
913 if (icr & REG_ICTL_MASK_RX_DATA)
914 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
916 if (icr & REG_ICTL_MASK_DEV_STOP_REQ)
917 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
919 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ)
920 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
922 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
923 fjes_hw_set_irqmask(hw,
924 REG_ICTL_MASK_TXRX_STOP_DONE, true);
926 if (icr & REG_ICTL_MASK_INFO_UPDATE)
927 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
937 static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
940 struct fjes_hw *hw = &adapter->hw;
941 enum ep_partner_status pstatus;
942 int max_epid, cur_epid;
945 max_epid = hw->max_epid;
946 start_epid = (start_epid + 1 + max_epid) % max_epid;
948 for (i = 0; i < max_epid; i++) {
949 cur_epid = (start_epid + i) % max_epid;
950 if (cur_epid == hw->my_epid)
953 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
954 if (pstatus == EP_PARTNER_SHARED) {
955 if (!fjes_hw_epbuf_rx_is_empty(
956 &hw->ep_shm_info[cur_epid].rx))
963 static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
968 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
973 fjes_hw_epbuf_rx_curpkt_get_addr(
974 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
979 static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
981 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
984 static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
986 struct fjes_hw *hw = &adapter->hw;
988 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
990 adapter->unset_rx_last = true;
991 napi_schedule(&adapter->napi);
994 static int fjes_poll(struct napi_struct *napi, int budget)
996 struct fjes_adapter *adapter =
997 container_of(napi, struct fjes_adapter, napi);
998 struct net_device *netdev = napi->dev;
999 struct fjes_hw *hw = &adapter->hw;
1000 struct sk_buff *skb;
1007 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1008 if (epidx == hw->my_epid)
1011 adapter->hw.ep_shm_info[epidx].tx.info->v1i.rx_status |=
1015 while (work_done < budget) {
1016 prefetch(&adapter->hw);
1017 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
1020 skb = napi_alloc_skb(napi, frame_len);
1022 adapter->stats64.rx_dropped += 1;
1023 hw->ep_shm_info[cur_epid].net_stats
1025 adapter->stats64.rx_errors += 1;
1026 hw->ep_shm_info[cur_epid].net_stats
1029 memcpy(skb_put(skb, frame_len),
1031 skb->protocol = eth_type_trans(skb, netdev);
1032 skb->ip_summed = CHECKSUM_UNNECESSARY;
1034 netif_receive_skb(skb);
1038 adapter->stats64.rx_packets += 1;
1039 hw->ep_shm_info[cur_epid].net_stats
1041 adapter->stats64.rx_bytes += frame_len;
1042 hw->ep_shm_info[cur_epid].net_stats
1043 .rx_bytes += frame_len;
1045 if (is_multicast_ether_addr(
1046 ((struct ethhdr *)frame)->h_dest)) {
1047 adapter->stats64.multicast += 1;
1048 hw->ep_shm_info[cur_epid].net_stats
1053 fjes_rxframe_release(adapter, cur_epid);
1054 adapter->unset_rx_last = true;
1060 if (work_done < budget) {
1061 napi_complete(napi);
1063 if (adapter->unset_rx_last) {
1064 adapter->rx_last_jiffies = jiffies;
1065 adapter->unset_rx_last = false;
1068 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1069 napi_reschedule(napi);
1071 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1072 if (epidx == hw->my_epid)
1074 adapter->hw.ep_shm_info[epidx]
1075 .tx.info->v1i.rx_status &=
1079 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1086 /* fjes_probe - Device Initialization Routine */
1087 static int fjes_probe(struct platform_device *plat_dev)
1089 struct fjes_adapter *adapter;
1090 struct net_device *netdev;
1091 struct resource *res;
1096 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1097 NET_NAME_UNKNOWN, fjes_netdev_setup,
1103 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1105 dev_set_drvdata(&plat_dev->dev, netdev);
1106 adapter = netdev_priv(netdev);
1107 adapter->netdev = netdev;
1108 adapter->plat_dev = plat_dev;
1112 /* setup the private structure */
1113 err = fjes_sw_init(adapter);
1115 goto err_free_netdev;
1117 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1118 adapter->force_reset = false;
1119 adapter->open_guard = false;
1121 adapter->txrx_wq = create_workqueue(DRV_NAME "/txrx");
1122 adapter->control_wq = create_workqueue(DRV_NAME "/control");
1124 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1125 INIT_WORK(&adapter->raise_intr_rxdata_task,
1126 fjes_raise_intr_rxdata_task);
1127 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1128 adapter->unshare_watch_bitmask = 0;
1130 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1131 adapter->interrupt_watch_enable = false;
1133 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1134 hw->hw_res.start = res->start;
1135 hw->hw_res.size = res->end - res->start + 1;
1136 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1137 err = fjes_hw_init(&adapter->hw);
1139 goto err_free_netdev;
1141 /* setup MAC address (02:00:00:00:00:[epid])*/
1142 netdev->dev_addr[0] = 2;
1143 netdev->dev_addr[1] = 0;
1144 netdev->dev_addr[2] = 0;
1145 netdev->dev_addr[3] = 0;
1146 netdev->dev_addr[4] = 0;
1147 netdev->dev_addr[5] = hw->my_epid; /* EPID */
1149 err = register_netdev(netdev);
1153 netif_carrier_off(netdev);
1158 fjes_hw_exit(&adapter->hw);
1160 free_netdev(netdev);
1165 /* fjes_remove - Device Removal Routine */
1166 static int fjes_remove(struct platform_device *plat_dev)
1168 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1169 struct fjes_adapter *adapter = netdev_priv(netdev);
1170 struct fjes_hw *hw = &adapter->hw;
1172 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1173 cancel_work_sync(&adapter->unshare_watch_task);
1174 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1175 cancel_work_sync(&adapter->tx_stall_task);
1176 if (adapter->control_wq)
1177 destroy_workqueue(adapter->control_wq);
1178 if (adapter->txrx_wq)
1179 destroy_workqueue(adapter->txrx_wq);
1181 unregister_netdev(netdev);
1185 netif_napi_del(&adapter->napi);
1187 free_netdev(netdev);
1192 static int fjes_sw_init(struct fjes_adapter *adapter)
1194 struct net_device *netdev = adapter->netdev;
1196 netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);
1201 /* fjes_netdev_setup - netdevice initialization routine */
1202 static void fjes_netdev_setup(struct net_device *netdev)
1204 ether_setup(netdev);
1206 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
1207 netdev->netdev_ops = &fjes_netdev_ops;
1208 fjes_set_ethtool_ops(netdev);
1209 netdev->mtu = fjes_support_mtu[0];
1210 netdev->flags |= IFF_BROADCAST;
1211 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1214 static void fjes_irq_watch_task(struct work_struct *work)
1216 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1217 struct fjes_adapter, interrupt_watch_task);
1219 local_irq_disable();
1220 fjes_intr(adapter->hw.hw_res.irq, adapter);
1223 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1224 napi_schedule(&adapter->napi);
1226 if (adapter->interrupt_watch_enable) {
1227 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1228 queue_delayed_work(adapter->control_wq,
1229 &adapter->interrupt_watch_task,
1230 FJES_IRQ_WATCH_DELAY);
1234 static void fjes_watch_unshare_task(struct work_struct *work)
1236 struct fjes_adapter *adapter =
1237 container_of(work, struct fjes_adapter, unshare_watch_task);
1239 struct net_device *netdev = adapter->netdev;
1240 struct fjes_hw *hw = &adapter->hw;
1242 int unshare_watch, unshare_reserve;
1243 int max_epid, my_epid, epidx;
1244 int stop_req, stop_req_done;
1245 ulong unshare_watch_bitmask;
1250 my_epid = hw->my_epid;
1251 max_epid = hw->max_epid;
1253 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1254 adapter->unshare_watch_bitmask = 0;
1256 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1257 (wait_time < 3000)) {
1258 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1259 if (epidx == hw->my_epid)
1262 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1265 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1267 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1268 FJES_RX_STOP_REQ_DONE;
1270 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1272 unshare_reserve = test_bit(epidx,
1273 &hw->hw_info.buffer_unshare_reserve_bit);
1276 (is_shared && (!is_shared || !stop_req_done))) &&
1277 (is_shared || !unshare_watch || !unshare_reserve))
1280 mutex_lock(&hw->hw_info.lock);
1281 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1289 &adapter->force_close_task)) {
1290 adapter->force_reset = true;
1292 &adapter->force_close_task);
1296 mutex_unlock(&hw->hw_info.lock);
1298 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1299 netdev->dev_addr, netdev->mtu);
1301 clear_bit(epidx, &hw->txrx_stop_req_bit);
1302 clear_bit(epidx, &unshare_watch_bitmask);
1304 &hw->hw_info.buffer_unshare_reserve_bit);
1311 if (hw->hw_info.buffer_unshare_reserve_bit) {
1312 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1313 if (epidx == hw->my_epid)
1317 &hw->hw_info.buffer_unshare_reserve_bit)) {
1318 mutex_lock(&hw->hw_info.lock);
1320 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1328 &adapter->force_close_task)) {
1329 adapter->force_reset = true;
1331 &adapter->force_close_task);
1335 mutex_unlock(&hw->hw_info.lock);
1337 fjes_hw_setup_epbuf(
1338 &hw->ep_shm_info[epidx].tx,
1339 netdev->dev_addr, netdev->mtu);
1341 clear_bit(epidx, &hw->txrx_stop_req_bit);
1342 clear_bit(epidx, &unshare_watch_bitmask);
1343 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1346 if (test_bit(epidx, &unshare_watch_bitmask)) {
1347 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1348 ~FJES_RX_STOP_REQ_DONE;
1354 /* fjes_init_module - Driver Registration Routine */
1355 static int __init fjes_init_module(void)
1359 pr_info("%s - version %s - %s\n",
1360 fjes_driver_string, fjes_driver_version, fjes_copyright);
1362 result = platform_driver_register(&fjes_driver);
1366 result = acpi_bus_register_driver(&fjes_acpi_driver);
1368 goto fail_acpi_driver;
1373 platform_driver_unregister(&fjes_driver);
1377 module_init(fjes_init_module);
1379 /* fjes_exit_module - Driver Exit Cleanup Routine */
1380 static void __exit fjes_exit_module(void)
1382 acpi_bus_unregister_driver(&fjes_acpi_driver);
1383 platform_driver_unregister(&fjes_driver);
1386 module_exit(fjes_exit_module);