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 #define ACPI_MOTHERBOARD_RESOURCE_HID "PNP0C02"
50 static int fjes_request_irq(struct fjes_adapter *);
51 static void fjes_free_irq(struct fjes_adapter *);
53 static int fjes_open(struct net_device *);
54 static int fjes_close(struct net_device *);
55 static int fjes_setup_resources(struct fjes_adapter *);
56 static void fjes_free_resources(struct fjes_adapter *);
57 static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
58 static void fjes_raise_intr_rxdata_task(struct work_struct *);
59 static void fjes_tx_stall_task(struct work_struct *);
60 static void fjes_force_close_task(struct work_struct *);
61 static irqreturn_t fjes_intr(int, void*);
62 static void fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *);
63 static int fjes_change_mtu(struct net_device *, int);
64 static int fjes_vlan_rx_add_vid(struct net_device *, __be16 proto, u16);
65 static int fjes_vlan_rx_kill_vid(struct net_device *, __be16 proto, u16);
66 static void fjes_tx_retry(struct net_device *);
68 static int fjes_acpi_add(struct acpi_device *);
69 static int fjes_acpi_remove(struct acpi_device *);
70 static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*);
72 static int fjes_probe(struct platform_device *);
73 static int fjes_remove(struct platform_device *);
75 static int fjes_sw_init(struct fjes_adapter *);
76 static void fjes_netdev_setup(struct net_device *);
77 static void fjes_irq_watch_task(struct work_struct *);
78 static void fjes_watch_unshare_task(struct work_struct *);
79 static void fjes_rx_irq(struct fjes_adapter *, int);
80 static int fjes_poll(struct napi_struct *, int);
82 static const struct acpi_device_id fjes_acpi_ids[] = {
83 {ACPI_MOTHERBOARD_RESOURCE_HID, 0},
86 MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
88 static struct acpi_driver fjes_acpi_driver = {
95 .remove = fjes_acpi_remove,
99 static struct platform_driver fjes_driver = {
104 .remove = fjes_remove,
107 static struct resource fjes_resource[] = {
109 .flags = IORESOURCE_MEM,
114 .flags = IORESOURCE_IRQ,
120 static bool is_extended_socket_device(struct acpi_device *device)
122 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
123 char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
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);
147 static int acpi_check_extended_socket_status(struct acpi_device *device)
149 unsigned long long sta;
152 status = acpi_evaluate_integer(device->handle, "_STA", NULL, &sta);
153 if (ACPI_FAILURE(status))
156 if (!((sta & ACPI_STA_DEVICE_PRESENT) &&
157 (sta & ACPI_STA_DEVICE_ENABLED) &&
158 (sta & ACPI_STA_DEVICE_UI) &&
159 (sta & ACPI_STA_DEVICE_FUNCTIONING)))
165 static int fjes_acpi_add(struct acpi_device *device)
167 struct platform_device *plat_dev;
170 if (!is_extended_socket_device(device))
173 if (acpi_check_extended_socket_status(device))
176 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
177 fjes_get_acpi_resource, fjes_resource);
178 if (ACPI_FAILURE(status))
181 /* create platform_device */
182 plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
183 ARRAY_SIZE(fjes_resource));
184 if (IS_ERR(plat_dev))
185 return PTR_ERR(plat_dev);
187 device->driver_data = plat_dev;
192 static int fjes_acpi_remove(struct acpi_device *device)
194 struct platform_device *plat_dev;
196 plat_dev = (struct platform_device *)acpi_driver_data(device);
197 platform_device_unregister(plat_dev);
203 fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
205 struct acpi_resource_address32 *addr;
206 struct acpi_resource_irq *irq;
207 struct resource *res = data;
209 switch (acpi_res->type) {
210 case ACPI_RESOURCE_TYPE_ADDRESS32:
211 addr = &acpi_res->data.address32;
212 res[0].start = addr->address.minimum;
213 res[0].end = addr->address.minimum +
214 addr->address.address_length - 1;
217 case ACPI_RESOURCE_TYPE_IRQ:
218 irq = &acpi_res->data.irq;
219 if (irq->interrupt_count != 1)
221 res[1].start = irq->interrupts[0];
222 res[1].end = irq->interrupts[0];
232 static int fjes_request_irq(struct fjes_adapter *adapter)
234 struct net_device *netdev = adapter->netdev;
237 adapter->interrupt_watch_enable = true;
238 if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
239 queue_delayed_work(adapter->control_wq,
240 &adapter->interrupt_watch_task,
241 FJES_IRQ_WATCH_DELAY);
244 if (!adapter->irq_registered) {
245 result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
246 IRQF_SHARED, netdev->name, adapter);
248 adapter->irq_registered = false;
250 adapter->irq_registered = true;
256 static void fjes_free_irq(struct fjes_adapter *adapter)
258 struct fjes_hw *hw = &adapter->hw;
260 adapter->interrupt_watch_enable = false;
261 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
263 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
265 if (adapter->irq_registered) {
266 free_irq(adapter->hw.hw_res.irq, adapter);
267 adapter->irq_registered = false;
271 static const struct net_device_ops fjes_netdev_ops = {
272 .ndo_open = fjes_open,
273 .ndo_stop = fjes_close,
274 .ndo_start_xmit = fjes_xmit_frame,
275 .ndo_get_stats64 = fjes_get_stats64,
276 .ndo_change_mtu = fjes_change_mtu,
277 .ndo_tx_timeout = fjes_tx_retry,
278 .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid,
279 .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
282 /* fjes_open - Called when a network interface is made active */
283 static int fjes_open(struct net_device *netdev)
285 struct fjes_adapter *adapter = netdev_priv(netdev);
286 struct fjes_hw *hw = &adapter->hw;
289 if (adapter->open_guard)
292 result = fjes_setup_resources(adapter);
296 hw->txrx_stop_req_bit = 0;
297 hw->epstop_req_bit = 0;
299 napi_enable(&adapter->napi);
301 fjes_hw_capture_interrupt_status(hw);
303 result = fjes_request_irq(adapter);
307 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
309 netif_tx_start_all_queues(netdev);
310 netif_carrier_on(netdev);
315 fjes_free_irq(adapter);
316 napi_disable(&adapter->napi);
319 fjes_free_resources(adapter);
323 /* fjes_close - Disables a network interface */
324 static int fjes_close(struct net_device *netdev)
326 struct fjes_adapter *adapter = netdev_priv(netdev);
327 struct fjes_hw *hw = &adapter->hw;
331 netif_tx_stop_all_queues(netdev);
332 netif_carrier_off(netdev);
334 fjes_hw_raise_epstop(hw);
336 napi_disable(&adapter->napi);
338 spin_lock_irqsave(&hw->rx_status_lock, flags);
339 for (epidx = 0; epidx < hw->max_epid; epidx++) {
340 if (epidx == hw->my_epid)
343 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
345 adapter->hw.ep_shm_info[epidx]
346 .tx.info->v1i.rx_status &=
349 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
351 fjes_free_irq(adapter);
353 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
354 cancel_work_sync(&adapter->unshare_watch_task);
355 adapter->unshare_watch_bitmask = 0;
356 cancel_work_sync(&adapter->raise_intr_rxdata_task);
357 cancel_work_sync(&adapter->tx_stall_task);
359 cancel_work_sync(&hw->update_zone_task);
360 cancel_work_sync(&hw->epstop_task);
362 fjes_hw_wait_epstop(hw);
364 fjes_free_resources(adapter);
369 static int fjes_setup_resources(struct fjes_adapter *adapter)
371 struct net_device *netdev = adapter->netdev;
372 struct ep_share_mem_info *buf_pair;
373 struct fjes_hw *hw = &adapter->hw;
378 mutex_lock(&hw->hw_info.lock);
379 result = fjes_hw_request_info(hw);
382 for (epidx = 0; epidx < hw->max_epid; epidx++) {
383 hw->ep_shm_info[epidx].es_status =
384 hw->hw_info.res_buf->info.info[epidx].es_status;
385 hw->ep_shm_info[epidx].zone =
386 hw->hw_info.res_buf->info.info[epidx].zone;
392 adapter->force_reset = true;
394 mutex_unlock(&hw->hw_info.lock);
397 mutex_unlock(&hw->hw_info.lock);
399 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
400 if ((epidx != hw->my_epid) &&
401 (hw->ep_shm_info[epidx].es_status ==
402 FJES_ZONING_STATUS_ENABLE)) {
403 fjes_hw_raise_interrupt(hw, epidx,
404 REG_ICTL_MASK_INFO_UPDATE);
405 hw->ep_shm_info[epidx].ep_stats
406 .send_intr_zoneupdate += 1;
410 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
412 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
413 if (epidx == hw->my_epid)
416 buf_pair = &hw->ep_shm_info[epidx];
418 spin_lock_irqsave(&hw->rx_status_lock, flags);
419 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
421 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
423 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
424 mutex_lock(&hw->hw_info.lock);
426 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
427 mutex_unlock(&hw->hw_info.lock);
435 adapter->force_reset = true;
439 hw->ep_shm_info[epidx].ep_stats
440 .com_regist_buf_exec += 1;
447 static void fjes_free_resources(struct fjes_adapter *adapter)
449 struct net_device *netdev = adapter->netdev;
450 struct fjes_device_command_param param;
451 struct ep_share_mem_info *buf_pair;
452 struct fjes_hw *hw = &adapter->hw;
453 bool reset_flag = false;
458 for (epidx = 0; epidx < hw->max_epid; epidx++) {
459 if (epidx == hw->my_epid)
462 mutex_lock(&hw->hw_info.lock);
463 result = fjes_hw_unregister_buff_addr(hw, epidx);
464 mutex_unlock(&hw->hw_info.lock);
466 hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1;
471 buf_pair = &hw->ep_shm_info[epidx];
473 spin_lock_irqsave(&hw->rx_status_lock, flags);
474 fjes_hw_setup_epbuf(&buf_pair->tx,
475 netdev->dev_addr, netdev->mtu);
476 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
478 clear_bit(epidx, &hw->txrx_stop_req_bit);
481 if (reset_flag || adapter->force_reset) {
482 result = fjes_hw_reset(hw);
484 adapter->force_reset = false;
487 adapter->open_guard = true;
489 hw->hw_info.buffer_share_bit = 0;
491 memset((void *)¶m, 0, sizeof(param));
493 param.req_len = hw->hw_info.req_buf_size;
494 param.req_start = __pa(hw->hw_info.req_buf);
495 param.res_len = hw->hw_info.res_buf_size;
496 param.res_start = __pa(hw->hw_info.res_buf);
497 param.share_start = __pa(hw->hw_info.share->ep_status);
499 fjes_hw_init_command_registers(hw, ¶m);
503 static void fjes_tx_stall_task(struct work_struct *work)
505 struct fjes_adapter *adapter = container_of(work,
506 struct fjes_adapter, tx_stall_task);
507 struct net_device *netdev = adapter->netdev;
508 struct fjes_hw *hw = &adapter->hw;
509 int all_queue_available, sendable;
510 enum ep_partner_status pstatus;
511 int max_epid, my_epid, epid;
512 union ep_buffer_info *info;
516 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
517 netif_wake_queue(netdev);
521 my_epid = hw->my_epid;
522 max_epid = hw->max_epid;
524 for (i = 0; i < 5; i++) {
525 all_queue_available = 1;
527 for (epid = 0; epid < max_epid; epid++) {
531 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
532 sendable = (pstatus == EP_PARTNER_SHARED);
536 info = adapter->hw.ep_shm_info[epid].tx.info;
538 if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
541 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
542 info->v1i.count_max)) {
543 all_queue_available = 0;
548 if (all_queue_available) {
549 netif_wake_queue(netdev);
554 usleep_range(50, 100);
556 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
559 static void fjes_force_close_task(struct work_struct *work)
561 struct fjes_adapter *adapter = container_of(work,
562 struct fjes_adapter, force_close_task);
563 struct net_device *netdev = adapter->netdev;
570 static void fjes_raise_intr_rxdata_task(struct work_struct *work)
572 struct fjes_adapter *adapter = container_of(work,
573 struct fjes_adapter, raise_intr_rxdata_task);
574 struct fjes_hw *hw = &adapter->hw;
575 enum ep_partner_status pstatus;
576 int max_epid, my_epid, epid;
578 my_epid = hw->my_epid;
579 max_epid = hw->max_epid;
581 for (epid = 0; epid < max_epid; epid++)
582 hw->ep_shm_info[epid].tx_status_work = 0;
584 for (epid = 0; epid < max_epid; epid++) {
588 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
589 if (pstatus == EP_PARTNER_SHARED) {
590 hw->ep_shm_info[epid].tx_status_work =
591 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
593 if (hw->ep_shm_info[epid].tx_status_work ==
594 FJES_TX_DELAY_SEND_PENDING) {
595 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
596 FJES_TX_DELAY_SEND_NONE;
601 for (epid = 0; epid < max_epid; epid++) {
605 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
606 if ((hw->ep_shm_info[epid].tx_status_work ==
607 FJES_TX_DELAY_SEND_PENDING) &&
608 (pstatus == EP_PARTNER_SHARED) &&
609 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
610 FJES_RX_POLL_WORK)) {
611 fjes_hw_raise_interrupt(hw, epid,
612 REG_ICTL_MASK_RX_DATA);
613 hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1;
617 usleep_range(500, 1000);
620 static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
621 void *data, size_t len)
625 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
630 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
631 FJES_TX_DELAY_SEND_PENDING;
632 if (!work_pending(&adapter->raise_intr_rxdata_task))
633 queue_work(adapter->txrx_wq,
634 &adapter->raise_intr_rxdata_task);
641 fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
643 struct fjes_adapter *adapter = netdev_priv(netdev);
644 struct fjes_hw *hw = &adapter->hw;
646 int max_epid, my_epid, dest_epid;
647 enum ep_partner_status pstatus;
648 struct netdev_queue *cur_queue;
649 char shortpkt[VLAN_ETH_HLEN];
660 cur_queue = netdev_get_tx_queue(netdev, queue_no);
662 eth = (struct ethhdr *)skb->data;
663 my_epid = hw->my_epid;
665 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
670 if (is_multicast_ether_addr(eth->h_dest)) {
672 max_epid = hw->max_epid;
674 } else if (is_local_ether_addr(eth->h_dest)) {
675 dest_epid = eth->h_dest[ETH_ALEN - 1];
676 max_epid = dest_epid + 1;
678 if ((eth->h_dest[0] == 0x02) &&
679 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
680 eth->h_dest[3] | eth->h_dest[4])) &&
681 (dest_epid < hw->max_epid)) {
688 adapter->stats64.tx_packets += 1;
689 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
690 adapter->stats64.tx_bytes += len;
691 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
698 adapter->stats64.tx_packets += 1;
699 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
700 adapter->stats64.tx_bytes += len;
701 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
704 for (; dest_epid < max_epid; dest_epid++) {
705 if (my_epid == dest_epid)
708 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
709 if (pstatus != EP_PARTNER_SHARED) {
711 hw->ep_shm_info[dest_epid].ep_stats
712 .tx_dropped_not_shared += 1;
714 } else if (!fjes_hw_check_epbuf_version(
715 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
716 /* version is NOT 0 */
717 adapter->stats64.tx_carrier_errors += 1;
718 hw->ep_shm_info[dest_epid].net_stats
719 .tx_carrier_errors += 1;
720 hw->ep_shm_info[dest_epid].ep_stats
721 .tx_dropped_ver_mismatch += 1;
724 } else if (!fjes_hw_check_mtu(
725 &adapter->hw.ep_shm_info[dest_epid].rx,
727 adapter->stats64.tx_dropped += 1;
728 hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
729 adapter->stats64.tx_errors += 1;
730 hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
731 hw->ep_shm_info[dest_epid].ep_stats
732 .tx_dropped_buf_size_mismatch += 1;
736 !fjes_hw_check_vlan_id(
737 &adapter->hw.ep_shm_info[dest_epid].rx,
739 hw->ep_shm_info[dest_epid].ep_stats
740 .tx_dropped_vlanid_mismatch += 1;
743 if (len < VLAN_ETH_HLEN) {
744 memset(shortpkt, 0, VLAN_ETH_HLEN);
745 memcpy(shortpkt, skb->data, skb->len);
750 if (adapter->tx_retry_count == 0) {
751 adapter->tx_start_jiffies = jiffies;
752 adapter->tx_retry_count = 1;
754 adapter->tx_retry_count++;
757 if (fjes_tx_send(adapter, dest_epid, data, len)) {
762 (long)adapter->tx_start_jiffies) >=
763 FJES_TX_RETRY_TIMEOUT) {
764 adapter->stats64.tx_fifo_errors += 1;
765 hw->ep_shm_info[dest_epid].net_stats
766 .tx_fifo_errors += 1;
767 adapter->stats64.tx_errors += 1;
768 hw->ep_shm_info[dest_epid].net_stats
773 netif_trans_update(netdev);
774 hw->ep_shm_info[dest_epid].ep_stats
775 .tx_buffer_full += 1;
776 netif_tx_stop_queue(cur_queue);
778 if (!work_pending(&adapter->tx_stall_task))
779 queue_work(adapter->txrx_wq,
780 &adapter->tx_stall_task);
782 ret = NETDEV_TX_BUSY;
786 adapter->stats64.tx_packets += 1;
787 hw->ep_shm_info[dest_epid].net_stats
789 adapter->stats64.tx_bytes += len;
790 hw->ep_shm_info[dest_epid].net_stats
794 adapter->tx_retry_count = 0;
800 if (ret == NETDEV_TX_OK) {
803 adapter->stats64.tx_packets += 1;
804 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
805 adapter->stats64.tx_bytes += 1;
806 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
813 static void fjes_tx_retry(struct net_device *netdev)
815 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
817 netif_tx_wake_queue(queue);
821 fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
823 struct fjes_adapter *adapter = netdev_priv(netdev);
825 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
828 static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
830 struct fjes_adapter *adapter = netdev_priv(netdev);
831 bool running = netif_running(netdev);
832 struct fjes_hw *hw = &adapter->hw;
837 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
838 if (new_mtu <= fjes_support_mtu[idx]) {
839 new_mtu = fjes_support_mtu[idx];
840 if (new_mtu == netdev->mtu)
852 spin_lock_irqsave(&hw->rx_status_lock, flags);
853 for (epidx = 0; epidx < hw->max_epid; epidx++) {
854 if (epidx == hw->my_epid)
856 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
857 ~FJES_RX_MTU_CHANGING_DONE;
859 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
861 netif_tx_stop_all_queues(netdev);
862 netif_carrier_off(netdev);
863 cancel_work_sync(&adapter->tx_stall_task);
864 napi_disable(&adapter->napi);
868 netif_tx_stop_all_queues(netdev);
871 netdev->mtu = new_mtu;
874 for (epidx = 0; epidx < hw->max_epid; epidx++) {
875 if (epidx == hw->my_epid)
878 spin_lock_irqsave(&hw->rx_status_lock, flags);
879 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
883 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
884 FJES_RX_MTU_CHANGING_DONE;
885 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
888 netif_tx_wake_all_queues(netdev);
889 netif_carrier_on(netdev);
890 napi_enable(&adapter->napi);
891 napi_schedule(&adapter->napi);
897 static int fjes_vlan_rx_add_vid(struct net_device *netdev,
898 __be16 proto, u16 vid)
900 struct fjes_adapter *adapter = netdev_priv(netdev);
904 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
905 if (epid == adapter->hw.my_epid)
908 if (!fjes_hw_check_vlan_id(
909 &adapter->hw.ep_shm_info[epid].tx, vid))
910 ret = fjes_hw_set_vlan_id(
911 &adapter->hw.ep_shm_info[epid].tx, vid);
914 return ret ? 0 : -ENOSPC;
917 static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
918 __be16 proto, u16 vid)
920 struct fjes_adapter *adapter = netdev_priv(netdev);
923 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
924 if (epid == adapter->hw.my_epid)
927 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
933 static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
936 struct fjes_hw *hw = &adapter->hw;
937 enum ep_partner_status status;
940 status = fjes_hw_get_partner_ep_status(hw, src_epid);
941 trace_fjes_txrx_stop_req_irq_pre(hw, src_epid, status);
943 case EP_PARTNER_UNSHARE:
944 case EP_PARTNER_COMPLETE:
947 case EP_PARTNER_WAITING:
948 if (src_epid < hw->my_epid) {
949 spin_lock_irqsave(&hw->rx_status_lock, flags);
950 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
951 FJES_RX_STOP_REQ_DONE;
952 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
954 clear_bit(src_epid, &hw->txrx_stop_req_bit);
955 set_bit(src_epid, &adapter->unshare_watch_bitmask);
957 if (!work_pending(&adapter->unshare_watch_task))
958 queue_work(adapter->control_wq,
959 &adapter->unshare_watch_task);
962 case EP_PARTNER_SHARED:
963 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
964 FJES_RX_STOP_REQ_REQUEST) {
965 set_bit(src_epid, &hw->epstop_req_bit);
966 if (!work_pending(&hw->epstop_task))
967 queue_work(adapter->control_wq,
972 trace_fjes_txrx_stop_req_irq_post(hw, src_epid);
975 static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
977 struct fjes_hw *hw = &adapter->hw;
978 enum ep_partner_status status;
981 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
983 status = fjes_hw_get_partner_ep_status(hw, src_epid);
984 trace_fjes_stop_req_irq_pre(hw, src_epid, status);
986 case EP_PARTNER_WAITING:
987 spin_lock_irqsave(&hw->rx_status_lock, flags);
988 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
989 FJES_RX_STOP_REQ_DONE;
990 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
991 clear_bit(src_epid, &hw->txrx_stop_req_bit);
993 case EP_PARTNER_UNSHARE:
994 case EP_PARTNER_COMPLETE:
996 set_bit(src_epid, &adapter->unshare_watch_bitmask);
997 if (!work_pending(&adapter->unshare_watch_task))
998 queue_work(adapter->control_wq,
999 &adapter->unshare_watch_task);
1001 case EP_PARTNER_SHARED:
1002 set_bit(src_epid, &hw->epstop_req_bit);
1004 if (!work_pending(&hw->epstop_task))
1005 queue_work(adapter->control_wq, &hw->epstop_task);
1008 trace_fjes_stop_req_irq_post(hw, src_epid);
1011 static void fjes_update_zone_irq(struct fjes_adapter *adapter,
1014 struct fjes_hw *hw = &adapter->hw;
1016 if (!work_pending(&hw->update_zone_task))
1017 queue_work(adapter->control_wq, &hw->update_zone_task);
1020 static irqreturn_t fjes_intr(int irq, void *data)
1022 struct fjes_adapter *adapter = data;
1023 struct fjes_hw *hw = &adapter->hw;
1027 icr = fjes_hw_capture_interrupt_status(hw);
1029 if (icr & REG_IS_MASK_IS_ASSERT) {
1030 if (icr & REG_ICTL_MASK_RX_DATA) {
1031 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
1032 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1036 if (icr & REG_ICTL_MASK_DEV_STOP_REQ) {
1037 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1038 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1039 .recv_intr_stop += 1;
1042 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) {
1043 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1044 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1045 .recv_intr_unshare += 1;
1048 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
1049 fjes_hw_set_irqmask(hw,
1050 REG_ICTL_MASK_TXRX_STOP_DONE, true);
1052 if (icr & REG_ICTL_MASK_INFO_UPDATE) {
1053 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
1054 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1055 .recv_intr_zoneupdate += 1;
1066 static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
1069 struct fjes_hw *hw = &adapter->hw;
1070 enum ep_partner_status pstatus;
1071 int max_epid, cur_epid;
1074 max_epid = hw->max_epid;
1075 start_epid = (start_epid + 1 + max_epid) % max_epid;
1077 for (i = 0; i < max_epid; i++) {
1078 cur_epid = (start_epid + i) % max_epid;
1079 if (cur_epid == hw->my_epid)
1082 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
1083 if (pstatus == EP_PARTNER_SHARED) {
1084 if (!fjes_hw_epbuf_rx_is_empty(
1085 &hw->ep_shm_info[cur_epid].rx))
1092 static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
1097 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
1102 fjes_hw_epbuf_rx_curpkt_get_addr(
1103 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
1108 static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
1110 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
1113 static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
1115 struct fjes_hw *hw = &adapter->hw;
1117 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
1119 adapter->unset_rx_last = true;
1120 napi_schedule(&adapter->napi);
1123 static int fjes_poll(struct napi_struct *napi, int budget)
1125 struct fjes_adapter *adapter =
1126 container_of(napi, struct fjes_adapter, napi);
1127 struct net_device *netdev = napi->dev;
1128 struct fjes_hw *hw = &adapter->hw;
1129 struct sk_buff *skb;
1136 spin_lock(&hw->rx_status_lock);
1137 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1138 if (epidx == hw->my_epid)
1141 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1143 adapter->hw.ep_shm_info[epidx]
1144 .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
1146 spin_unlock(&hw->rx_status_lock);
1148 while (work_done < budget) {
1149 prefetch(&adapter->hw);
1150 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
1153 skb = napi_alloc_skb(napi, frame_len);
1155 adapter->stats64.rx_dropped += 1;
1156 hw->ep_shm_info[cur_epid].net_stats
1158 adapter->stats64.rx_errors += 1;
1159 hw->ep_shm_info[cur_epid].net_stats
1162 skb_put_data(skb, frame, frame_len);
1163 skb->protocol = eth_type_trans(skb, netdev);
1164 skb->ip_summed = CHECKSUM_UNNECESSARY;
1166 netif_receive_skb(skb);
1170 adapter->stats64.rx_packets += 1;
1171 hw->ep_shm_info[cur_epid].net_stats
1173 adapter->stats64.rx_bytes += frame_len;
1174 hw->ep_shm_info[cur_epid].net_stats
1175 .rx_bytes += frame_len;
1177 if (is_multicast_ether_addr(
1178 ((struct ethhdr *)frame)->h_dest)) {
1179 adapter->stats64.multicast += 1;
1180 hw->ep_shm_info[cur_epid].net_stats
1185 fjes_rxframe_release(adapter, cur_epid);
1186 adapter->unset_rx_last = true;
1192 if (work_done < budget) {
1193 napi_complete_done(napi, work_done);
1195 if (adapter->unset_rx_last) {
1196 adapter->rx_last_jiffies = jiffies;
1197 adapter->unset_rx_last = false;
1200 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1201 napi_reschedule(napi);
1203 spin_lock(&hw->rx_status_lock);
1204 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1205 if (epidx == hw->my_epid)
1207 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1209 adapter->hw.ep_shm_info[epidx].tx
1210 .info->v1i.rx_status &=
1213 spin_unlock(&hw->rx_status_lock);
1215 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1222 /* fjes_probe - Device Initialization Routine */
1223 static int fjes_probe(struct platform_device *plat_dev)
1225 struct fjes_adapter *adapter;
1226 struct net_device *netdev;
1227 struct resource *res;
1232 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1233 NET_NAME_UNKNOWN, fjes_netdev_setup,
1239 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1241 dev_set_drvdata(&plat_dev->dev, netdev);
1242 adapter = netdev_priv(netdev);
1243 adapter->netdev = netdev;
1244 adapter->plat_dev = plat_dev;
1248 /* setup the private structure */
1249 err = fjes_sw_init(adapter);
1251 goto err_free_netdev;
1253 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1254 adapter->force_reset = false;
1255 adapter->open_guard = false;
1257 adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1258 if (unlikely(!adapter->txrx_wq)) {
1260 goto err_free_netdev;
1263 adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1265 if (unlikely(!adapter->control_wq)) {
1267 goto err_free_txrx_wq;
1270 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1271 INIT_WORK(&adapter->raise_intr_rxdata_task,
1272 fjes_raise_intr_rxdata_task);
1273 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1274 adapter->unshare_watch_bitmask = 0;
1276 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1277 adapter->interrupt_watch_enable = false;
1279 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1282 goto err_free_control_wq;
1284 hw->hw_res.start = res->start;
1285 hw->hw_res.size = resource_size(res);
1286 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1287 err = fjes_hw_init(&adapter->hw);
1289 goto err_free_control_wq;
1291 /* setup MAC address (02:00:00:00:00:[epid])*/
1292 netdev->dev_addr[0] = 2;
1293 netdev->dev_addr[1] = 0;
1294 netdev->dev_addr[2] = 0;
1295 netdev->dev_addr[3] = 0;
1296 netdev->dev_addr[4] = 0;
1297 netdev->dev_addr[5] = hw->my_epid; /* EPID */
1299 err = register_netdev(netdev);
1303 netif_carrier_off(netdev);
1305 fjes_dbg_adapter_init(adapter);
1310 fjes_hw_exit(&adapter->hw);
1311 err_free_control_wq:
1312 destroy_workqueue(adapter->control_wq);
1314 destroy_workqueue(adapter->txrx_wq);
1316 free_netdev(netdev);
1321 /* fjes_remove - Device Removal Routine */
1322 static int fjes_remove(struct platform_device *plat_dev)
1324 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1325 struct fjes_adapter *adapter = netdev_priv(netdev);
1326 struct fjes_hw *hw = &adapter->hw;
1328 fjes_dbg_adapter_exit(adapter);
1330 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1331 cancel_work_sync(&adapter->unshare_watch_task);
1332 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1333 cancel_work_sync(&adapter->tx_stall_task);
1334 if (adapter->control_wq)
1335 destroy_workqueue(adapter->control_wq);
1336 if (adapter->txrx_wq)
1337 destroy_workqueue(adapter->txrx_wq);
1339 unregister_netdev(netdev);
1343 netif_napi_del(&adapter->napi);
1345 free_netdev(netdev);
1350 static int fjes_sw_init(struct fjes_adapter *adapter)
1352 struct net_device *netdev = adapter->netdev;
1354 netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);
1359 /* fjes_netdev_setup - netdevice initialization routine */
1360 static void fjes_netdev_setup(struct net_device *netdev)
1362 ether_setup(netdev);
1364 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
1365 netdev->netdev_ops = &fjes_netdev_ops;
1366 fjes_set_ethtool_ops(netdev);
1367 netdev->mtu = fjes_support_mtu[3];
1368 netdev->min_mtu = fjes_support_mtu[0];
1369 netdev->max_mtu = fjes_support_mtu[3];
1370 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1373 static void fjes_irq_watch_task(struct work_struct *work)
1375 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1376 struct fjes_adapter, interrupt_watch_task);
1378 local_irq_disable();
1379 fjes_intr(adapter->hw.hw_res.irq, adapter);
1382 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1383 napi_schedule(&adapter->napi);
1385 if (adapter->interrupt_watch_enable) {
1386 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1387 queue_delayed_work(adapter->control_wq,
1388 &adapter->interrupt_watch_task,
1389 FJES_IRQ_WATCH_DELAY);
1393 static void fjes_watch_unshare_task(struct work_struct *work)
1395 struct fjes_adapter *adapter =
1396 container_of(work, struct fjes_adapter, unshare_watch_task);
1398 struct net_device *netdev = adapter->netdev;
1399 struct fjes_hw *hw = &adapter->hw;
1401 int unshare_watch, unshare_reserve;
1402 int max_epid, my_epid, epidx;
1403 int stop_req, stop_req_done;
1404 ulong unshare_watch_bitmask;
1405 unsigned long flags;
1410 my_epid = hw->my_epid;
1411 max_epid = hw->max_epid;
1413 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1414 adapter->unshare_watch_bitmask = 0;
1416 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1417 (wait_time < 3000)) {
1418 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1419 if (epidx == hw->my_epid)
1422 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1425 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1427 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1428 FJES_RX_STOP_REQ_DONE;
1430 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1432 unshare_reserve = test_bit(epidx,
1433 &hw->hw_info.buffer_unshare_reserve_bit);
1436 (is_shared && (!is_shared || !stop_req_done))) &&
1437 (is_shared || !unshare_watch || !unshare_reserve))
1440 mutex_lock(&hw->hw_info.lock);
1441 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1449 &adapter->force_close_task)) {
1450 adapter->force_reset = true;
1452 &adapter->force_close_task);
1456 mutex_unlock(&hw->hw_info.lock);
1457 hw->ep_shm_info[epidx].ep_stats
1458 .com_unregist_buf_exec += 1;
1460 spin_lock_irqsave(&hw->rx_status_lock, flags);
1461 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1462 netdev->dev_addr, netdev->mtu);
1463 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1465 clear_bit(epidx, &hw->txrx_stop_req_bit);
1466 clear_bit(epidx, &unshare_watch_bitmask);
1468 &hw->hw_info.buffer_unshare_reserve_bit);
1475 if (hw->hw_info.buffer_unshare_reserve_bit) {
1476 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1477 if (epidx == hw->my_epid)
1481 &hw->hw_info.buffer_unshare_reserve_bit)) {
1482 mutex_lock(&hw->hw_info.lock);
1484 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1492 &adapter->force_close_task)) {
1493 adapter->force_reset = true;
1495 &adapter->force_close_task);
1499 mutex_unlock(&hw->hw_info.lock);
1501 hw->ep_shm_info[epidx].ep_stats
1502 .com_unregist_buf_exec += 1;
1504 spin_lock_irqsave(&hw->rx_status_lock, flags);
1505 fjes_hw_setup_epbuf(
1506 &hw->ep_shm_info[epidx].tx,
1507 netdev->dev_addr, netdev->mtu);
1508 spin_unlock_irqrestore(&hw->rx_status_lock,
1511 clear_bit(epidx, &hw->txrx_stop_req_bit);
1512 clear_bit(epidx, &unshare_watch_bitmask);
1513 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1516 if (test_bit(epidx, &unshare_watch_bitmask)) {
1517 spin_lock_irqsave(&hw->rx_status_lock, flags);
1518 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1519 ~FJES_RX_STOP_REQ_DONE;
1520 spin_unlock_irqrestore(&hw->rx_status_lock,
1528 acpi_find_extended_socket_device(acpi_handle obj_handle, u32 level,
1529 void *context, void **return_value)
1531 struct acpi_device *device;
1532 bool *found = context;
1535 result = acpi_bus_get_device(obj_handle, &device);
1539 if (strcmp(acpi_device_hid(device), ACPI_MOTHERBOARD_RESOURCE_HID))
1542 if (!is_extended_socket_device(device))
1545 if (acpi_check_extended_socket_status(device))
1549 return AE_CTRL_TERMINATE;
1552 /* fjes_init_module - Driver Registration Routine */
1553 static int __init fjes_init_module(void)
1558 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
1559 acpi_find_extended_socket_device, NULL, &found,
1565 pr_info("%s - version %s - %s\n",
1566 fjes_driver_string, fjes_driver_version, fjes_copyright);
1570 result = platform_driver_register(&fjes_driver);
1576 result = acpi_bus_register_driver(&fjes_acpi_driver);
1578 goto fail_acpi_driver;
1583 platform_driver_unregister(&fjes_driver);
1588 module_init(fjes_init_module);
1590 /* fjes_exit_module - Driver Exit Cleanup Routine */
1591 static void __exit fjes_exit_module(void)
1593 acpi_bus_unregister_driver(&fjes_acpi_driver);
1594 platform_driver_unregister(&fjes_driver);
1598 module_exit(fjes_exit_module);