1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright Gavin Shan, IBM Corporation 2016.
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/init.h>
9 #include <linux/netdevice.h>
10 #include <linux/skbuff.h>
12 #include <linux/platform_device.h>
15 #include <net/net_namespace.h>
17 #include <net/addrconf.h>
19 #include <net/genetlink.h>
23 #include "ncsi-netlink.h"
25 LIST_HEAD(ncsi_dev_list);
26 DEFINE_SPINLOCK(ncsi_dev_lock);
28 bool ncsi_channel_has_link(struct ncsi_channel *channel)
30 return !!(channel->modes[NCSI_MODE_LINK].data[2] & 0x1);
33 bool ncsi_channel_is_last(struct ncsi_dev_priv *ndp,
34 struct ncsi_channel *channel)
36 struct ncsi_package *np;
37 struct ncsi_channel *nc;
39 NCSI_FOR_EACH_PACKAGE(ndp, np)
40 NCSI_FOR_EACH_CHANNEL(np, nc) {
43 if (nc->state == NCSI_CHANNEL_ACTIVE &&
44 ncsi_channel_has_link(nc))
51 static void ncsi_report_link(struct ncsi_dev_priv *ndp, bool force_down)
53 struct ncsi_dev *nd = &ndp->ndev;
54 struct ncsi_package *np;
55 struct ncsi_channel *nc;
58 nd->state = ncsi_dev_state_functional;
65 NCSI_FOR_EACH_PACKAGE(ndp, np) {
66 NCSI_FOR_EACH_CHANNEL(np, nc) {
67 spin_lock_irqsave(&nc->lock, flags);
69 if (!list_empty(&nc->link) ||
70 nc->state != NCSI_CHANNEL_ACTIVE) {
71 spin_unlock_irqrestore(&nc->lock, flags);
75 if (ncsi_channel_has_link(nc)) {
76 spin_unlock_irqrestore(&nc->lock, flags);
81 spin_unlock_irqrestore(&nc->lock, flags);
89 static void ncsi_channel_monitor(struct timer_list *t)
91 struct ncsi_channel *nc = from_timer(nc, t, monitor.timer);
92 struct ncsi_package *np = nc->package;
93 struct ncsi_dev_priv *ndp = np->ndp;
94 struct ncsi_channel_mode *ncm;
95 struct ncsi_cmd_arg nca;
96 bool enabled, chained;
97 unsigned int monitor_state;
101 spin_lock_irqsave(&nc->lock, flags);
103 chained = !list_empty(&nc->link);
104 enabled = nc->monitor.enabled;
105 monitor_state = nc->monitor.state;
106 spin_unlock_irqrestore(&nc->lock, flags);
109 return; /* expected race disabling timer */
110 if (WARN_ON_ONCE(chained))
113 if (state != NCSI_CHANNEL_INACTIVE &&
114 state != NCSI_CHANNEL_ACTIVE) {
116 netdev_warn(ndp->ndev.dev,
117 "Bad NCSI monitor state channel %d 0x%x %s queue\n",
118 nc->id, state, chained ? "on" : "off");
119 spin_lock_irqsave(&nc->lock, flags);
120 nc->monitor.enabled = false;
121 spin_unlock_irqrestore(&nc->lock, flags);
125 switch (monitor_state) {
126 case NCSI_CHANNEL_MONITOR_START:
127 case NCSI_CHANNEL_MONITOR_RETRY:
129 nca.package = np->id;
130 nca.channel = nc->id;
131 nca.type = NCSI_PKT_CMD_GLS;
133 ret = ncsi_xmit_cmd(&nca);
135 netdev_err(ndp->ndev.dev, "Error %d sending GLS\n",
138 case NCSI_CHANNEL_MONITOR_WAIT ... NCSI_CHANNEL_MONITOR_WAIT_MAX:
141 netdev_err(ndp->ndev.dev, "NCSI Channel %d timed out!\n",
143 ncsi_report_link(ndp, true);
144 ndp->flags |= NCSI_DEV_RESHUFFLE;
146 ncm = &nc->modes[NCSI_MODE_LINK];
147 spin_lock_irqsave(&nc->lock, flags);
148 nc->monitor.enabled = false;
149 nc->state = NCSI_CHANNEL_INVISIBLE;
150 ncm->data[2] &= ~0x1;
151 spin_unlock_irqrestore(&nc->lock, flags);
153 spin_lock_irqsave(&ndp->lock, flags);
154 nc->state = NCSI_CHANNEL_ACTIVE;
155 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
156 spin_unlock_irqrestore(&ndp->lock, flags);
157 ncsi_process_next_channel(ndp);
161 spin_lock_irqsave(&nc->lock, flags);
163 spin_unlock_irqrestore(&nc->lock, flags);
164 mod_timer(&nc->monitor.timer, jiffies + HZ);
167 void ncsi_start_channel_monitor(struct ncsi_channel *nc)
171 spin_lock_irqsave(&nc->lock, flags);
172 WARN_ON_ONCE(nc->monitor.enabled);
173 nc->monitor.enabled = true;
174 nc->monitor.state = NCSI_CHANNEL_MONITOR_START;
175 spin_unlock_irqrestore(&nc->lock, flags);
177 mod_timer(&nc->monitor.timer, jiffies + HZ);
180 void ncsi_stop_channel_monitor(struct ncsi_channel *nc)
184 spin_lock_irqsave(&nc->lock, flags);
185 if (!nc->monitor.enabled) {
186 spin_unlock_irqrestore(&nc->lock, flags);
189 nc->monitor.enabled = false;
190 spin_unlock_irqrestore(&nc->lock, flags);
192 del_timer_sync(&nc->monitor.timer);
195 struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np,
198 struct ncsi_channel *nc;
200 NCSI_FOR_EACH_CHANNEL(np, nc) {
208 struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, unsigned char id)
210 struct ncsi_channel *nc, *tmp;
214 nc = kzalloc(sizeof(*nc), GFP_ATOMIC);
220 nc->state = NCSI_CHANNEL_INACTIVE;
221 nc->monitor.enabled = false;
222 timer_setup(&nc->monitor.timer, ncsi_channel_monitor, 0);
223 spin_lock_init(&nc->lock);
224 INIT_LIST_HEAD(&nc->link);
225 for (index = 0; index < NCSI_CAP_MAX; index++)
226 nc->caps[index].index = index;
227 for (index = 0; index < NCSI_MODE_MAX; index++)
228 nc->modes[index].index = index;
230 spin_lock_irqsave(&np->lock, flags);
231 tmp = ncsi_find_channel(np, id);
233 spin_unlock_irqrestore(&np->lock, flags);
238 list_add_tail_rcu(&nc->node, &np->channels);
240 spin_unlock_irqrestore(&np->lock, flags);
245 static void ncsi_remove_channel(struct ncsi_channel *nc)
247 struct ncsi_package *np = nc->package;
250 spin_lock_irqsave(&nc->lock, flags);
252 /* Release filters */
253 kfree(nc->mac_filter.addrs);
254 kfree(nc->vlan_filter.vids);
256 nc->state = NCSI_CHANNEL_INACTIVE;
257 spin_unlock_irqrestore(&nc->lock, flags);
258 ncsi_stop_channel_monitor(nc);
260 /* Remove and free channel */
261 spin_lock_irqsave(&np->lock, flags);
262 list_del_rcu(&nc->node);
264 spin_unlock_irqrestore(&np->lock, flags);
269 struct ncsi_package *ncsi_find_package(struct ncsi_dev_priv *ndp,
272 struct ncsi_package *np;
274 NCSI_FOR_EACH_PACKAGE(ndp, np) {
282 struct ncsi_package *ncsi_add_package(struct ncsi_dev_priv *ndp,
285 struct ncsi_package *np, *tmp;
288 np = kzalloc(sizeof(*np), GFP_ATOMIC);
294 spin_lock_init(&np->lock);
295 INIT_LIST_HEAD(&np->channels);
296 np->channel_whitelist = UINT_MAX;
298 spin_lock_irqsave(&ndp->lock, flags);
299 tmp = ncsi_find_package(ndp, id);
301 spin_unlock_irqrestore(&ndp->lock, flags);
306 list_add_tail_rcu(&np->node, &ndp->packages);
308 spin_unlock_irqrestore(&ndp->lock, flags);
313 void ncsi_remove_package(struct ncsi_package *np)
315 struct ncsi_dev_priv *ndp = np->ndp;
316 struct ncsi_channel *nc, *tmp;
319 /* Release all child channels */
320 list_for_each_entry_safe(nc, tmp, &np->channels, node)
321 ncsi_remove_channel(nc);
323 /* Remove and free package */
324 spin_lock_irqsave(&ndp->lock, flags);
325 list_del_rcu(&np->node);
327 spin_unlock_irqrestore(&ndp->lock, flags);
332 void ncsi_find_package_and_channel(struct ncsi_dev_priv *ndp,
334 struct ncsi_package **np,
335 struct ncsi_channel **nc)
337 struct ncsi_package *p;
338 struct ncsi_channel *c;
340 p = ncsi_find_package(ndp, NCSI_PACKAGE_INDEX(id));
341 c = p ? ncsi_find_channel(p, NCSI_CHANNEL_INDEX(id)) : NULL;
349 /* For two consecutive NCSI commands, the packet IDs shouldn't
350 * be same. Otherwise, the bogus response might be replied. So
351 * the available IDs are allocated in round-robin fashion.
353 struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp,
354 unsigned int req_flags)
356 struct ncsi_request *nr = NULL;
357 int i, limit = ARRAY_SIZE(ndp->requests);
360 /* Check if there is one available request until the ceiling */
361 spin_lock_irqsave(&ndp->lock, flags);
362 for (i = ndp->request_id; i < limit; i++) {
363 if (ndp->requests[i].used)
366 nr = &ndp->requests[i];
368 nr->flags = req_flags;
369 ndp->request_id = i + 1;
373 /* Fail back to check from the starting cursor */
374 for (i = NCSI_REQ_START_IDX; i < ndp->request_id; i++) {
375 if (ndp->requests[i].used)
378 nr = &ndp->requests[i];
380 nr->flags = req_flags;
381 ndp->request_id = i + 1;
386 spin_unlock_irqrestore(&ndp->lock, flags);
390 void ncsi_free_request(struct ncsi_request *nr)
392 struct ncsi_dev_priv *ndp = nr->ndp;
393 struct sk_buff *cmd, *rsp;
399 del_timer_sync(&nr->timer);
402 spin_lock_irqsave(&ndp->lock, flags);
408 driven = !!(nr->flags & NCSI_REQ_FLAG_EVENT_DRIVEN);
409 spin_unlock_irqrestore(&ndp->lock, flags);
411 if (driven && cmd && --ndp->pending_req_num == 0)
412 schedule_work(&ndp->work);
414 /* Release command and response */
419 struct ncsi_dev *ncsi_find_dev(struct net_device *dev)
421 struct ncsi_dev_priv *ndp;
423 NCSI_FOR_EACH_DEV(ndp) {
424 if (ndp->ndev.dev == dev)
431 static void ncsi_request_timeout(struct timer_list *t)
433 struct ncsi_request *nr = from_timer(nr, t, timer);
434 struct ncsi_dev_priv *ndp = nr->ndp;
435 struct ncsi_cmd_pkt *cmd;
436 struct ncsi_package *np;
437 struct ncsi_channel *nc;
440 /* If the request already had associated response,
441 * let the response handler to release it.
443 spin_lock_irqsave(&ndp->lock, flags);
445 if (nr->rsp || !nr->cmd) {
446 spin_unlock_irqrestore(&ndp->lock, flags);
449 spin_unlock_irqrestore(&ndp->lock, flags);
451 if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
453 /* Find the package */
454 cmd = (struct ncsi_cmd_pkt *)
455 skb_network_header(nr->cmd);
456 ncsi_find_package_and_channel(ndp,
457 cmd->cmd.common.channel,
459 ncsi_send_netlink_timeout(nr, np, nc);
463 /* Release the request */
464 ncsi_free_request(nr);
467 static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
469 struct ncsi_dev *nd = &ndp->ndev;
470 struct ncsi_package *np;
471 struct ncsi_channel *nc, *tmp;
472 struct ncsi_cmd_arg nca;
476 np = ndp->active_package;
477 nc = ndp->active_channel;
479 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
481 case ncsi_dev_state_suspend:
482 nd->state = ncsi_dev_state_suspend_select;
484 case ncsi_dev_state_suspend_select:
485 ndp->pending_req_num = 1;
487 nca.type = NCSI_PKT_CMD_SP;
488 nca.package = np->id;
489 nca.channel = NCSI_RESERVED_CHANNEL;
490 if (ndp->flags & NCSI_DEV_HWA)
495 /* To retrieve the last link states of channels in current
496 * package when current active channel needs fail over to
497 * another one. It means we will possibly select another
498 * channel as next active one. The link states of channels
499 * are most important factor of the selection. So we need
500 * accurate link states. Unfortunately, the link states on
501 * inactive channels can't be updated with LSC AEN in time.
503 if (ndp->flags & NCSI_DEV_RESHUFFLE)
504 nd->state = ncsi_dev_state_suspend_gls;
506 nd->state = ncsi_dev_state_suspend_dcnt;
507 ret = ncsi_xmit_cmd(&nca);
512 case ncsi_dev_state_suspend_gls:
513 ndp->pending_req_num = np->channel_num;
515 nca.type = NCSI_PKT_CMD_GLS;
516 nca.package = np->id;
518 nd->state = ncsi_dev_state_suspend_dcnt;
519 NCSI_FOR_EACH_CHANNEL(np, nc) {
520 nca.channel = nc->id;
521 ret = ncsi_xmit_cmd(&nca);
527 case ncsi_dev_state_suspend_dcnt:
528 ndp->pending_req_num = 1;
530 nca.type = NCSI_PKT_CMD_DCNT;
531 nca.package = np->id;
532 nca.channel = nc->id;
534 nd->state = ncsi_dev_state_suspend_dc;
535 ret = ncsi_xmit_cmd(&nca);
540 case ncsi_dev_state_suspend_dc:
541 ndp->pending_req_num = 1;
543 nca.type = NCSI_PKT_CMD_DC;
544 nca.package = np->id;
545 nca.channel = nc->id;
548 nd->state = ncsi_dev_state_suspend_deselect;
549 ret = ncsi_xmit_cmd(&nca);
553 NCSI_FOR_EACH_CHANNEL(np, tmp) {
554 /* If there is another channel active on this package
555 * do not deselect the package.
557 if (tmp != nc && tmp->state == NCSI_CHANNEL_ACTIVE) {
558 nd->state = ncsi_dev_state_suspend_done;
563 case ncsi_dev_state_suspend_deselect:
564 ndp->pending_req_num = 1;
566 nca.type = NCSI_PKT_CMD_DP;
567 nca.package = np->id;
568 nca.channel = NCSI_RESERVED_CHANNEL;
570 nd->state = ncsi_dev_state_suspend_done;
571 ret = ncsi_xmit_cmd(&nca);
576 case ncsi_dev_state_suspend_done:
577 spin_lock_irqsave(&nc->lock, flags);
578 nc->state = NCSI_CHANNEL_INACTIVE;
579 spin_unlock_irqrestore(&nc->lock, flags);
580 if (ndp->flags & NCSI_DEV_RESET)
583 ncsi_process_next_channel(ndp);
586 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n",
592 nd->state = ncsi_dev_state_functional;
595 /* Check the VLAN filter bitmap for a set filter, and construct a
596 * "Set VLAN Filter - Disable" packet if found.
598 static int clear_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc,
599 struct ncsi_cmd_arg *nca)
601 struct ncsi_channel_vlan_filter *ncf;
607 ncf = &nc->vlan_filter;
608 bitmap = &ncf->bitmap;
610 spin_lock_irqsave(&nc->lock, flags);
611 index = find_next_bit(bitmap, ncf->n_vids, 0);
612 if (index >= ncf->n_vids) {
613 spin_unlock_irqrestore(&nc->lock, flags);
616 vid = ncf->vids[index];
618 clear_bit(index, bitmap);
619 ncf->vids[index] = 0;
620 spin_unlock_irqrestore(&nc->lock, flags);
622 nca->type = NCSI_PKT_CMD_SVF;
624 /* HW filter index starts at 1 */
625 nca->bytes[6] = index + 1;
626 nca->bytes[7] = 0x00;
630 /* Find an outstanding VLAN tag and construct a "Set VLAN Filter - Enable"
633 static int set_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc,
634 struct ncsi_cmd_arg *nca)
636 struct ncsi_channel_vlan_filter *ncf;
637 struct vlan_vid *vlan = NULL;
643 if (list_empty(&ndp->vlan_vids))
646 ncf = &nc->vlan_filter;
647 bitmap = &ncf->bitmap;
649 spin_lock_irqsave(&nc->lock, flags);
652 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
654 for (i = 0; i < ncf->n_vids; i++)
655 if (ncf->vids[i] == vid) {
665 /* No VLAN ID is not set */
666 spin_unlock_irqrestore(&nc->lock, flags);
670 index = find_next_zero_bit(bitmap, ncf->n_vids, 0);
671 if (index < 0 || index >= ncf->n_vids) {
672 netdev_err(ndp->ndev.dev,
673 "Channel %u already has all VLAN filters set\n",
675 spin_unlock_irqrestore(&nc->lock, flags);
679 ncf->vids[index] = vid;
680 set_bit(index, bitmap);
681 spin_unlock_irqrestore(&nc->lock, flags);
683 nca->type = NCSI_PKT_CMD_SVF;
685 /* HW filter index starts at 1 */
686 nca->bytes[6] = index + 1;
687 nca->bytes[7] = 0x01;
692 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
694 /* NCSI OEM Command APIs */
695 static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca)
697 unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN];
700 nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN;
702 memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN);
703 *(unsigned int *)data = ntohl(NCSI_OEM_MFR_BCM_ID);
704 data[5] = NCSI_OEM_BCM_CMD_GMA;
708 ret = ncsi_xmit_cmd(nca);
710 netdev_err(nca->ndp->ndev.dev,
711 "NCSI: Failed to transmit cmd 0x%x during configure\n",
716 static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca)
719 u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN];
720 u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)];
724 nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN;
726 memset(&u, 0, sizeof(u));
727 u.data_u32[0] = ntohl(NCSI_OEM_MFR_MLX_ID);
728 u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA;
729 u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM;
731 nca->data = u.data_u8;
733 ret = ncsi_xmit_cmd(nca);
735 netdev_err(nca->ndp->ndev.dev,
736 "NCSI: Failed to transmit cmd 0x%x during configure\n",
741 static int ncsi_oem_smaf_mlx(struct ncsi_cmd_arg *nca)
744 u8 data_u8[NCSI_OEM_MLX_CMD_SMAF_LEN];
745 u32 data_u32[NCSI_OEM_MLX_CMD_SMAF_LEN / sizeof(u32)];
749 memset(&u, 0, sizeof(u));
750 u.data_u32[0] = ntohl(NCSI_OEM_MFR_MLX_ID);
751 u.data_u8[5] = NCSI_OEM_MLX_CMD_SMAF;
752 u.data_u8[6] = NCSI_OEM_MLX_CMD_SMAF_PARAM;
753 memcpy(&u.data_u8[MLX_SMAF_MAC_ADDR_OFFSET],
754 nca->ndp->ndev.dev->dev_addr, ETH_ALEN);
755 u.data_u8[MLX_SMAF_MED_SUPPORT_OFFSET] =
756 (MLX_MC_RBT_AVL | MLX_MC_RBT_SUPPORT);
758 nca->payload = NCSI_OEM_MLX_CMD_SMAF_LEN;
759 nca->data = u.data_u8;
761 ret = ncsi_xmit_cmd(nca);
763 netdev_err(nca->ndp->ndev.dev,
764 "NCSI: Failed to transmit cmd 0x%x during probe\n",
769 /* OEM Command handlers initialization */
770 static struct ncsi_oem_gma_handler {
772 int (*handler)(struct ncsi_cmd_arg *nca);
773 } ncsi_oem_gma_handlers[] = {
774 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm },
775 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx }
778 static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id)
780 struct ncsi_oem_gma_handler *nch = NULL;
783 /* This function should only be called once, return if flag set */
784 if (nca->ndp->gma_flag == 1)
787 /* Find gma handler for given manufacturer id */
788 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) {
789 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) {
790 if (ncsi_oem_gma_handlers[i].handler)
791 nch = &ncsi_oem_gma_handlers[i];
797 netdev_err(nca->ndp->ndev.dev,
798 "NCSI: No GMA handler available for MFR-ID (0x%x)\n",
803 /* Get Mac address from NCSI device */
804 return nch->handler(nca);
807 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
809 /* Determine if a given channel from the channel_queue should be used for Tx */
810 static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp,
811 struct ncsi_channel *nc)
813 struct ncsi_channel_mode *ncm;
814 struct ncsi_channel *channel;
815 struct ncsi_package *np;
817 /* Check if any other channel has Tx enabled; a channel may have already
818 * been configured and removed from the channel queue.
820 NCSI_FOR_EACH_PACKAGE(ndp, np) {
821 if (!ndp->multi_package && np != nc->package)
823 NCSI_FOR_EACH_CHANNEL(np, channel) {
824 ncm = &channel->modes[NCSI_MODE_TX_ENABLE];
830 /* This channel is the preferred channel and has link */
831 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) {
832 np = channel->package;
833 if (np->preferred_channel &&
834 ncsi_channel_has_link(np->preferred_channel)) {
835 return np->preferred_channel == nc;
839 /* This channel has link */
840 if (ncsi_channel_has_link(nc))
843 list_for_each_entry_rcu(channel, &ndp->channel_queue, link)
844 if (ncsi_channel_has_link(channel))
847 /* No other channel has link; default to this one */
851 /* Change the active Tx channel in a multi-channel setup */
852 int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp,
853 struct ncsi_package *package,
854 struct ncsi_channel *disable,
855 struct ncsi_channel *enable)
857 struct ncsi_cmd_arg nca;
858 struct ncsi_channel *nc;
859 struct ncsi_package *np;
862 if (!package->multi_channel && !ndp->multi_package)
863 netdev_warn(ndp->ndev.dev,
864 "NCSI: Trying to update Tx channel in single-channel mode\n");
868 /* Find current channel with Tx enabled */
869 NCSI_FOR_EACH_PACKAGE(ndp, np) {
872 if (!ndp->multi_package && np != package)
875 NCSI_FOR_EACH_CHANNEL(np, nc)
876 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) {
882 /* Find a suitable channel for Tx */
883 NCSI_FOR_EACH_PACKAGE(ndp, np) {
886 if (!ndp->multi_package && np != package)
888 if (!(ndp->package_whitelist & (0x1 << np->id)))
891 if (np->preferred_channel &&
892 ncsi_channel_has_link(np->preferred_channel)) {
893 enable = np->preferred_channel;
897 NCSI_FOR_EACH_CHANNEL(np, nc) {
898 if (!(np->channel_whitelist & 0x1 << nc->id))
900 if (nc->state != NCSI_CHANNEL_ACTIVE)
902 if (ncsi_channel_has_link(nc)) {
909 if (disable == enable)
916 nca.channel = disable->id;
917 nca.package = disable->package->id;
918 nca.type = NCSI_PKT_CMD_DCNT;
919 ret = ncsi_xmit_cmd(&nca);
921 netdev_err(ndp->ndev.dev,
922 "Error %d sending DCNT\n",
926 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id);
928 nca.channel = enable->id;
929 nca.package = enable->package->id;
930 nca.type = NCSI_PKT_CMD_ECNT;
931 ret = ncsi_xmit_cmd(&nca);
933 netdev_err(ndp->ndev.dev,
934 "Error %d sending ECNT\n",
940 static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
942 struct ncsi_package *np = ndp->active_package;
943 struct ncsi_channel *nc = ndp->active_channel;
944 struct ncsi_channel *hot_nc = NULL;
945 struct ncsi_dev *nd = &ndp->ndev;
946 struct net_device *dev = nd->dev;
947 struct ncsi_cmd_arg nca;
953 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
955 case ncsi_dev_state_config:
956 case ncsi_dev_state_config_sp:
957 ndp->pending_req_num = 1;
959 /* Select the specific package */
960 nca.type = NCSI_PKT_CMD_SP;
961 if (ndp->flags & NCSI_DEV_HWA)
965 nca.package = np->id;
966 nca.channel = NCSI_RESERVED_CHANNEL;
967 ret = ncsi_xmit_cmd(&nca);
969 netdev_err(ndp->ndev.dev,
970 "NCSI: Failed to transmit CMD_SP\n");
974 nd->state = ncsi_dev_state_config_cis;
976 case ncsi_dev_state_config_cis:
977 ndp->pending_req_num = 1;
979 /* Clear initial state */
980 nca.type = NCSI_PKT_CMD_CIS;
981 nca.package = np->id;
982 nca.channel = nc->id;
983 ret = ncsi_xmit_cmd(&nca);
985 netdev_err(ndp->ndev.dev,
986 "NCSI: Failed to transmit CMD_CIS\n");
990 nd->state = ncsi_dev_state_config_oem_gma;
992 case ncsi_dev_state_config_oem_gma:
993 nd->state = ncsi_dev_state_config_clear_vids;
996 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
997 nca.type = NCSI_PKT_CMD_OEM;
998 nca.package = np->id;
999 nca.channel = nc->id;
1000 ndp->pending_req_num = 1;
1001 ret = ncsi_gma_handler(&nca, nc->version.mf_id);
1002 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
1005 schedule_work(&ndp->work);
1008 case ncsi_dev_state_config_clear_vids:
1009 case ncsi_dev_state_config_svf:
1010 case ncsi_dev_state_config_ev:
1011 case ncsi_dev_state_config_sma:
1012 case ncsi_dev_state_config_ebf:
1013 case ncsi_dev_state_config_dgmf:
1014 case ncsi_dev_state_config_ecnt:
1015 case ncsi_dev_state_config_ec:
1016 case ncsi_dev_state_config_ae:
1017 case ncsi_dev_state_config_gls:
1018 ndp->pending_req_num = 1;
1020 nca.package = np->id;
1021 nca.channel = nc->id;
1023 /* Clear any active filters on the channel before setting */
1024 if (nd->state == ncsi_dev_state_config_clear_vids) {
1025 ret = clear_one_vid(ndp, nc, &nca);
1027 nd->state = ncsi_dev_state_config_svf;
1028 schedule_work(&ndp->work);
1032 nd->state = ncsi_dev_state_config_clear_vids;
1033 /* Add known VLAN tags to the filter */
1034 } else if (nd->state == ncsi_dev_state_config_svf) {
1035 ret = set_one_vid(ndp, nc, &nca);
1037 nd->state = ncsi_dev_state_config_ev;
1038 schedule_work(&ndp->work);
1042 nd->state = ncsi_dev_state_config_svf;
1043 /* Enable/Disable the VLAN filter */
1044 } else if (nd->state == ncsi_dev_state_config_ev) {
1045 if (list_empty(&ndp->vlan_vids)) {
1046 nca.type = NCSI_PKT_CMD_DV;
1048 nca.type = NCSI_PKT_CMD_EV;
1049 nca.bytes[3] = NCSI_CAP_VLAN_NO;
1051 nd->state = ncsi_dev_state_config_sma;
1052 } else if (nd->state == ncsi_dev_state_config_sma) {
1053 /* Use first entry in unicast filter table. Note that
1054 * the MAC filter table starts from entry 1 instead of
1057 nca.type = NCSI_PKT_CMD_SMA;
1058 for (index = 0; index < 6; index++)
1059 nca.bytes[index] = dev->dev_addr[index];
1062 nd->state = ncsi_dev_state_config_ebf;
1063 } else if (nd->state == ncsi_dev_state_config_ebf) {
1064 nca.type = NCSI_PKT_CMD_EBF;
1065 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap;
1066 /* if multicast global filtering is supported then
1067 * disable it so that all multicast packet will be
1068 * forwarded to management controller
1070 if (nc->caps[NCSI_CAP_GENERIC].cap &
1071 NCSI_CAP_GENERIC_MC)
1072 nd->state = ncsi_dev_state_config_dgmf;
1073 else if (ncsi_channel_is_tx(ndp, nc))
1074 nd->state = ncsi_dev_state_config_ecnt;
1076 nd->state = ncsi_dev_state_config_ec;
1077 } else if (nd->state == ncsi_dev_state_config_dgmf) {
1078 nca.type = NCSI_PKT_CMD_DGMF;
1079 if (ncsi_channel_is_tx(ndp, nc))
1080 nd->state = ncsi_dev_state_config_ecnt;
1082 nd->state = ncsi_dev_state_config_ec;
1083 } else if (nd->state == ncsi_dev_state_config_ecnt) {
1084 if (np->preferred_channel &&
1085 nc != np->preferred_channel)
1086 netdev_info(ndp->ndev.dev,
1087 "NCSI: Tx failed over to channel %u\n",
1089 nca.type = NCSI_PKT_CMD_ECNT;
1090 nd->state = ncsi_dev_state_config_ec;
1091 } else if (nd->state == ncsi_dev_state_config_ec) {
1092 /* Enable AEN if it's supported */
1093 nca.type = NCSI_PKT_CMD_EC;
1094 nd->state = ncsi_dev_state_config_ae;
1095 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK))
1096 nd->state = ncsi_dev_state_config_gls;
1097 } else if (nd->state == ncsi_dev_state_config_ae) {
1098 nca.type = NCSI_PKT_CMD_AE;
1100 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap;
1101 nd->state = ncsi_dev_state_config_gls;
1102 } else if (nd->state == ncsi_dev_state_config_gls) {
1103 nca.type = NCSI_PKT_CMD_GLS;
1104 nd->state = ncsi_dev_state_config_done;
1107 ret = ncsi_xmit_cmd(&nca);
1109 netdev_err(ndp->ndev.dev,
1110 "NCSI: Failed to transmit CMD %x\n",
1115 case ncsi_dev_state_config_done:
1116 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n",
1118 spin_lock_irqsave(&nc->lock, flags);
1119 nc->state = NCSI_CHANNEL_ACTIVE;
1121 if (ndp->flags & NCSI_DEV_RESET) {
1122 /* A reset event happened during config, start it now */
1123 nc->reconfigure_needed = false;
1124 spin_unlock_irqrestore(&nc->lock, flags);
1129 if (nc->reconfigure_needed) {
1130 /* This channel's configuration has been updated
1131 * part-way during the config state - start the
1132 * channel configuration over
1134 nc->reconfigure_needed = false;
1135 nc->state = NCSI_CHANNEL_INACTIVE;
1136 spin_unlock_irqrestore(&nc->lock, flags);
1138 spin_lock_irqsave(&ndp->lock, flags);
1139 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1140 spin_unlock_irqrestore(&ndp->lock, flags);
1142 netdev_dbg(dev, "Dirty NCSI channel state reset\n");
1143 ncsi_process_next_channel(ndp);
1147 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
1151 netdev_dbg(ndp->ndev.dev,
1152 "NCSI: channel %u link down after config\n",
1155 spin_unlock_irqrestore(&nc->lock, flags);
1157 /* Update the hot channel */
1158 spin_lock_irqsave(&ndp->lock, flags);
1159 ndp->hot_channel = hot_nc;
1160 spin_unlock_irqrestore(&ndp->lock, flags);
1162 ncsi_start_channel_monitor(nc);
1163 ncsi_process_next_channel(ndp);
1166 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n",
1173 ncsi_report_link(ndp, true);
1176 static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
1178 struct ncsi_channel *nc, *found, *hot_nc;
1179 struct ncsi_channel_mode *ncm;
1180 unsigned long flags, cflags;
1181 struct ncsi_package *np;
1184 spin_lock_irqsave(&ndp->lock, flags);
1185 hot_nc = ndp->hot_channel;
1186 spin_unlock_irqrestore(&ndp->lock, flags);
1188 /* By default the search is done once an inactive channel with up
1189 * link is found, unless a preferred channel is set.
1190 * If multi_package or multi_channel are configured all channels in the
1191 * whitelist are added to the channel queue.
1195 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1196 if (!(ndp->package_whitelist & (0x1 << np->id)))
1198 NCSI_FOR_EACH_CHANNEL(np, nc) {
1199 if (!(np->channel_whitelist & (0x1 << nc->id)))
1202 spin_lock_irqsave(&nc->lock, cflags);
1204 if (!list_empty(&nc->link) ||
1205 nc->state != NCSI_CHANNEL_INACTIVE) {
1206 spin_unlock_irqrestore(&nc->lock, cflags);
1216 ncm = &nc->modes[NCSI_MODE_LINK];
1217 if (ncm->data[2] & 0x1) {
1222 /* If multi_channel is enabled configure all valid
1223 * channels whether or not they currently have link
1224 * so they will have AENs enabled.
1226 if (with_link || np->multi_channel) {
1227 spin_lock_irqsave(&ndp->lock, flags);
1228 list_add_tail_rcu(&nc->link,
1229 &ndp->channel_queue);
1230 spin_unlock_irqrestore(&ndp->lock, flags);
1232 netdev_dbg(ndp->ndev.dev,
1233 "NCSI: Channel %u added to queue (link %s)\n",
1235 ncm->data[2] & 0x1 ? "up" : "down");
1238 spin_unlock_irqrestore(&nc->lock, cflags);
1240 if (with_link && !np->multi_channel)
1243 if (with_link && !ndp->multi_package)
1247 if (list_empty(&ndp->channel_queue) && found) {
1248 netdev_info(ndp->ndev.dev,
1249 "NCSI: No channel with link found, configuring channel %u\n",
1251 spin_lock_irqsave(&ndp->lock, flags);
1252 list_add_tail_rcu(&found->link, &ndp->channel_queue);
1253 spin_unlock_irqrestore(&ndp->lock, flags);
1254 } else if (!found) {
1255 netdev_warn(ndp->ndev.dev,
1256 "NCSI: No channel found to configure!\n");
1257 ncsi_report_link(ndp, true);
1261 return ncsi_process_next_channel(ndp);
1264 static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp)
1266 struct ncsi_package *np;
1267 struct ncsi_channel *nc;
1269 bool has_channel = false;
1271 /* The hardware arbitration is disabled if any one channel
1272 * doesn't support explicitly.
1274 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1275 NCSI_FOR_EACH_CHANNEL(np, nc) {
1278 cap = nc->caps[NCSI_CAP_GENERIC].cap;
1279 if (!(cap & NCSI_CAP_GENERIC_HWA) ||
1280 (cap & NCSI_CAP_GENERIC_HWA_MASK) !=
1281 NCSI_CAP_GENERIC_HWA_SUPPORT) {
1282 ndp->flags &= ~NCSI_DEV_HWA;
1289 ndp->flags |= NCSI_DEV_HWA;
1293 ndp->flags &= ~NCSI_DEV_HWA;
1297 static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
1299 struct ncsi_dev *nd = &ndp->ndev;
1300 struct ncsi_package *np;
1301 struct ncsi_channel *nc;
1302 struct ncsi_cmd_arg nca;
1303 unsigned char index;
1307 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
1308 switch (nd->state) {
1309 case ncsi_dev_state_probe:
1310 nd->state = ncsi_dev_state_probe_deselect;
1312 case ncsi_dev_state_probe_deselect:
1313 ndp->pending_req_num = 8;
1315 /* Deselect all possible packages */
1316 nca.type = NCSI_PKT_CMD_DP;
1317 nca.channel = NCSI_RESERVED_CHANNEL;
1318 for (index = 0; index < 8; index++) {
1319 nca.package = index;
1320 ret = ncsi_xmit_cmd(&nca);
1325 nd->state = ncsi_dev_state_probe_package;
1327 case ncsi_dev_state_probe_package:
1328 ndp->pending_req_num = 1;
1330 nca.type = NCSI_PKT_CMD_SP;
1332 nca.package = ndp->package_probe_id;
1333 nca.channel = NCSI_RESERVED_CHANNEL;
1334 ret = ncsi_xmit_cmd(&nca);
1337 nd->state = ncsi_dev_state_probe_channel;
1339 case ncsi_dev_state_probe_channel:
1340 ndp->active_package = ncsi_find_package(ndp,
1341 ndp->package_probe_id);
1342 if (!ndp->active_package) {
1344 nd->state = ncsi_dev_state_probe_dp;
1345 schedule_work(&ndp->work);
1348 nd->state = ncsi_dev_state_probe_cis;
1349 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) &&
1350 ndp->mlx_multi_host)
1351 nd->state = ncsi_dev_state_probe_mlx_gma;
1353 schedule_work(&ndp->work);
1355 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
1356 case ncsi_dev_state_probe_mlx_gma:
1357 ndp->pending_req_num = 1;
1359 nca.type = NCSI_PKT_CMD_OEM;
1360 nca.package = ndp->active_package->id;
1362 ret = ncsi_oem_gma_handler_mlx(&nca);
1366 nd->state = ncsi_dev_state_probe_mlx_smaf;
1368 case ncsi_dev_state_probe_mlx_smaf:
1369 ndp->pending_req_num = 1;
1371 nca.type = NCSI_PKT_CMD_OEM;
1372 nca.package = ndp->active_package->id;
1374 ret = ncsi_oem_smaf_mlx(&nca);
1378 nd->state = ncsi_dev_state_probe_cis;
1380 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
1381 case ncsi_dev_state_probe_cis:
1382 ndp->pending_req_num = NCSI_RESERVED_CHANNEL;
1384 /* Clear initial state */
1385 nca.type = NCSI_PKT_CMD_CIS;
1386 nca.package = ndp->active_package->id;
1387 for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) {
1388 nca.channel = index;
1389 ret = ncsi_xmit_cmd(&nca);
1394 nd->state = ncsi_dev_state_probe_gvi;
1396 case ncsi_dev_state_probe_gvi:
1397 case ncsi_dev_state_probe_gc:
1398 case ncsi_dev_state_probe_gls:
1399 np = ndp->active_package;
1400 ndp->pending_req_num = np->channel_num;
1402 /* Retrieve version, capability or link status */
1403 if (nd->state == ncsi_dev_state_probe_gvi)
1404 nca.type = NCSI_PKT_CMD_GVI;
1405 else if (nd->state == ncsi_dev_state_probe_gc)
1406 nca.type = NCSI_PKT_CMD_GC;
1408 nca.type = NCSI_PKT_CMD_GLS;
1410 nca.package = np->id;
1411 NCSI_FOR_EACH_CHANNEL(np, nc) {
1412 nca.channel = nc->id;
1413 ret = ncsi_xmit_cmd(&nca);
1418 if (nd->state == ncsi_dev_state_probe_gvi)
1419 nd->state = ncsi_dev_state_probe_gc;
1420 else if (nd->state == ncsi_dev_state_probe_gc)
1421 nd->state = ncsi_dev_state_probe_gls;
1423 nd->state = ncsi_dev_state_probe_dp;
1425 case ncsi_dev_state_probe_dp:
1426 ndp->pending_req_num = 1;
1428 /* Deselect the current package */
1429 nca.type = NCSI_PKT_CMD_DP;
1430 nca.package = ndp->package_probe_id;
1431 nca.channel = NCSI_RESERVED_CHANNEL;
1432 ret = ncsi_xmit_cmd(&nca);
1436 /* Probe next package */
1437 ndp->package_probe_id++;
1438 if (ndp->package_probe_id >= 8) {
1439 /* Probe finished */
1440 ndp->flags |= NCSI_DEV_PROBED;
1443 nd->state = ncsi_dev_state_probe_package;
1444 ndp->active_package = NULL;
1447 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n",
1451 if (ndp->flags & NCSI_DEV_PROBED) {
1452 /* Check if all packages have HWA support */
1453 ncsi_check_hwa(ndp);
1454 ncsi_choose_active_channel(ndp);
1459 netdev_err(ndp->ndev.dev,
1460 "NCSI: Failed to transmit cmd 0x%x during probe\n",
1462 ncsi_report_link(ndp, true);
1465 static void ncsi_dev_work(struct work_struct *work)
1467 struct ncsi_dev_priv *ndp = container_of(work,
1468 struct ncsi_dev_priv, work);
1469 struct ncsi_dev *nd = &ndp->ndev;
1471 switch (nd->state & ncsi_dev_state_major) {
1472 case ncsi_dev_state_probe:
1473 ncsi_probe_channel(ndp);
1475 case ncsi_dev_state_suspend:
1476 ncsi_suspend_channel(ndp);
1478 case ncsi_dev_state_config:
1479 ncsi_configure_channel(ndp);
1482 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n",
1487 int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
1489 struct ncsi_channel *nc;
1491 unsigned long flags;
1493 spin_lock_irqsave(&ndp->lock, flags);
1494 nc = list_first_or_null_rcu(&ndp->channel_queue,
1495 struct ncsi_channel, link);
1497 spin_unlock_irqrestore(&ndp->lock, flags);
1501 list_del_init(&nc->link);
1502 spin_unlock_irqrestore(&ndp->lock, flags);
1504 spin_lock_irqsave(&nc->lock, flags);
1505 old_state = nc->state;
1506 nc->state = NCSI_CHANNEL_INVISIBLE;
1507 spin_unlock_irqrestore(&nc->lock, flags);
1509 ndp->active_channel = nc;
1510 ndp->active_package = nc->package;
1512 switch (old_state) {
1513 case NCSI_CHANNEL_INACTIVE:
1514 ndp->ndev.state = ncsi_dev_state_config;
1515 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n",
1517 ncsi_configure_channel(ndp);
1519 case NCSI_CHANNEL_ACTIVE:
1520 ndp->ndev.state = ncsi_dev_state_suspend;
1521 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n",
1523 ncsi_suspend_channel(ndp);
1526 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n",
1527 old_state, nc->package->id, nc->id);
1528 ncsi_report_link(ndp, false);
1535 ndp->active_channel = NULL;
1536 ndp->active_package = NULL;
1537 if (ndp->flags & NCSI_DEV_RESHUFFLE) {
1538 ndp->flags &= ~NCSI_DEV_RESHUFFLE;
1539 return ncsi_choose_active_channel(ndp);
1542 ncsi_report_link(ndp, false);
1546 static int ncsi_kick_channels(struct ncsi_dev_priv *ndp)
1548 struct ncsi_dev *nd = &ndp->ndev;
1549 struct ncsi_channel *nc;
1550 struct ncsi_package *np;
1551 unsigned long flags;
1554 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1555 NCSI_FOR_EACH_CHANNEL(np, nc) {
1556 spin_lock_irqsave(&nc->lock, flags);
1558 /* Channels may be busy, mark dirty instead of
1560 * a) not ACTIVE (configured)
1561 * b) in the channel_queue (to be configured)
1562 * c) it's ndev is in the config state
1564 if (nc->state != NCSI_CHANNEL_ACTIVE) {
1565 if ((ndp->ndev.state & 0xff00) ==
1566 ncsi_dev_state_config ||
1567 !list_empty(&nc->link)) {
1569 "NCSI: channel %p marked dirty\n",
1571 nc->reconfigure_needed = true;
1573 spin_unlock_irqrestore(&nc->lock, flags);
1577 spin_unlock_irqrestore(&nc->lock, flags);
1579 ncsi_stop_channel_monitor(nc);
1580 spin_lock_irqsave(&nc->lock, flags);
1581 nc->state = NCSI_CHANNEL_INACTIVE;
1582 spin_unlock_irqrestore(&nc->lock, flags);
1584 spin_lock_irqsave(&ndp->lock, flags);
1585 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1586 spin_unlock_irqrestore(&ndp->lock, flags);
1588 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc);
1596 int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1598 struct ncsi_dev_priv *ndp;
1599 unsigned int n_vids = 0;
1600 struct vlan_vid *vlan;
1601 struct ncsi_dev *nd;
1607 nd = ncsi_find_dev(dev);
1609 netdev_warn(dev, "NCSI: No net_device?\n");
1613 ndp = TO_NCSI_DEV_PRIV(nd);
1615 /* Add the VLAN id to our internal list */
1616 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
1618 if (vlan->vid == vid) {
1619 netdev_dbg(dev, "NCSI: vid %u already registered\n",
1624 if (n_vids >= NCSI_MAX_VLAN_VIDS) {
1626 "tried to add vlan id %u but NCSI max already registered (%u)\n",
1627 vid, NCSI_MAX_VLAN_VIDS);
1631 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1635 vlan->proto = proto;
1637 list_add_rcu(&vlan->list, &ndp->vlan_vids);
1639 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid);
1641 found = ncsi_kick_channels(ndp) != 0;
1643 return found ? ncsi_process_next_channel(ndp) : 0;
1645 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid);
1647 int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1649 struct vlan_vid *vlan, *tmp;
1650 struct ncsi_dev_priv *ndp;
1651 struct ncsi_dev *nd;
1657 nd = ncsi_find_dev(dev);
1659 netdev_warn(dev, "NCSI: no net_device?\n");
1663 ndp = TO_NCSI_DEV_PRIV(nd);
1665 /* Remove the VLAN id from our internal list */
1666 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list)
1667 if (vlan->vid == vid) {
1668 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid);
1669 list_del_rcu(&vlan->list);
1675 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid);
1679 found = ncsi_kick_channels(ndp) != 0;
1681 return found ? ncsi_process_next_channel(ndp) : 0;
1683 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid);
1685 struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
1686 void (*handler)(struct ncsi_dev *ndev))
1688 struct ncsi_dev_priv *ndp;
1689 struct ncsi_dev *nd;
1690 struct platform_device *pdev;
1691 struct device_node *np;
1692 unsigned long flags;
1695 /* Check if the device has been registered or not */
1696 nd = ncsi_find_dev(dev);
1700 /* Create NCSI device */
1701 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC);
1706 nd->state = ncsi_dev_state_registered;
1708 nd->handler = handler;
1709 ndp->pending_req_num = 0;
1710 INIT_LIST_HEAD(&ndp->channel_queue);
1711 INIT_LIST_HEAD(&ndp->vlan_vids);
1712 INIT_WORK(&ndp->work, ncsi_dev_work);
1713 ndp->package_whitelist = UINT_MAX;
1715 /* Initialize private NCSI device */
1716 spin_lock_init(&ndp->lock);
1717 INIT_LIST_HEAD(&ndp->packages);
1718 ndp->request_id = NCSI_REQ_START_IDX;
1719 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) {
1720 ndp->requests[i].id = i;
1721 ndp->requests[i].ndp = ndp;
1722 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0);
1725 spin_lock_irqsave(&ncsi_dev_lock, flags);
1726 list_add_tail_rcu(&ndp->node, &ncsi_dev_list);
1727 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1729 /* Register NCSI packet Rx handler */
1730 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI);
1731 ndp->ptype.func = ncsi_rcv_rsp;
1732 ndp->ptype.dev = dev;
1733 dev_add_pack(&ndp->ptype);
1735 pdev = to_platform_device(dev->dev.parent);
1737 np = pdev->dev.of_node;
1738 if (np && of_get_property(np, "mlx,multi-host", NULL))
1739 ndp->mlx_multi_host = true;
1744 EXPORT_SYMBOL_GPL(ncsi_register_dev);
1746 int ncsi_start_dev(struct ncsi_dev *nd)
1748 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1750 if (nd->state != ncsi_dev_state_registered &&
1751 nd->state != ncsi_dev_state_functional)
1754 if (!(ndp->flags & NCSI_DEV_PROBED)) {
1755 ndp->package_probe_id = 0;
1756 nd->state = ncsi_dev_state_probe;
1757 schedule_work(&ndp->work);
1761 return ncsi_reset_dev(nd);
1763 EXPORT_SYMBOL_GPL(ncsi_start_dev);
1765 void ncsi_stop_dev(struct ncsi_dev *nd)
1767 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1768 struct ncsi_package *np;
1769 struct ncsi_channel *nc;
1772 unsigned long flags;
1774 /* Stop the channel monitor on any active channels. Don't reset the
1775 * channel state so we know which were active when ncsi_start_dev()
1778 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1779 NCSI_FOR_EACH_CHANNEL(np, nc) {
1780 ncsi_stop_channel_monitor(nc);
1782 spin_lock_irqsave(&nc->lock, flags);
1783 chained = !list_empty(&nc->link);
1784 old_state = nc->state;
1785 spin_unlock_irqrestore(&nc->lock, flags);
1787 WARN_ON_ONCE(chained ||
1788 old_state == NCSI_CHANNEL_INVISIBLE);
1792 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n");
1793 ncsi_report_link(ndp, true);
1795 EXPORT_SYMBOL_GPL(ncsi_stop_dev);
1797 int ncsi_reset_dev(struct ncsi_dev *nd)
1799 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1800 struct ncsi_channel *nc, *active, *tmp;
1801 struct ncsi_package *np;
1802 unsigned long flags;
1804 spin_lock_irqsave(&ndp->lock, flags);
1806 if (!(ndp->flags & NCSI_DEV_RESET)) {
1807 /* Haven't been called yet, check states */
1808 switch (nd->state & ncsi_dev_state_major) {
1809 case ncsi_dev_state_registered:
1810 case ncsi_dev_state_probe:
1811 /* Not even probed yet - do nothing */
1812 spin_unlock_irqrestore(&ndp->lock, flags);
1814 case ncsi_dev_state_suspend:
1815 case ncsi_dev_state_config:
1816 /* Wait for the channel to finish its suspend/config
1817 * operation; once it finishes it will check for
1818 * NCSI_DEV_RESET and reset the state.
1820 ndp->flags |= NCSI_DEV_RESET;
1821 spin_unlock_irqrestore(&ndp->lock, flags);
1825 switch (nd->state) {
1826 case ncsi_dev_state_suspend_done:
1827 case ncsi_dev_state_config_done:
1828 case ncsi_dev_state_functional:
1832 /* Current reset operation happening */
1833 spin_unlock_irqrestore(&ndp->lock, flags);
1838 if (!list_empty(&ndp->channel_queue)) {
1839 /* Clear any channel queue we may have interrupted */
1840 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link)
1841 list_del_init(&nc->link);
1843 spin_unlock_irqrestore(&ndp->lock, flags);
1846 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1847 NCSI_FOR_EACH_CHANNEL(np, nc) {
1848 spin_lock_irqsave(&nc->lock, flags);
1850 if (nc->state == NCSI_CHANNEL_ACTIVE) {
1852 nc->state = NCSI_CHANNEL_INVISIBLE;
1853 spin_unlock_irqrestore(&nc->lock, flags);
1854 ncsi_stop_channel_monitor(nc);
1858 spin_unlock_irqrestore(&nc->lock, flags);
1866 spin_lock_irqsave(&ndp->lock, flags);
1867 ndp->flags &= ~NCSI_DEV_RESET;
1868 spin_unlock_irqrestore(&ndp->lock, flags);
1869 return ncsi_choose_active_channel(ndp);
1872 spin_lock_irqsave(&ndp->lock, flags);
1873 ndp->flags |= NCSI_DEV_RESET;
1874 ndp->active_channel = active;
1875 ndp->active_package = active->package;
1876 spin_unlock_irqrestore(&ndp->lock, flags);
1878 nd->state = ncsi_dev_state_suspend;
1879 schedule_work(&ndp->work);
1883 void ncsi_unregister_dev(struct ncsi_dev *nd)
1885 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1886 struct ncsi_package *np, *tmp;
1887 unsigned long flags;
1889 dev_remove_pack(&ndp->ptype);
1891 list_for_each_entry_safe(np, tmp, &ndp->packages, node)
1892 ncsi_remove_package(np);
1894 spin_lock_irqsave(&ncsi_dev_lock, flags);
1895 list_del_rcu(&ndp->node);
1896 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1900 EXPORT_SYMBOL_GPL(ncsi_unregister_dev);