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_first_bit(bitmap, ncf->n_vids);
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_first_zero_bit(bitmap, ncf->n_vids);
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 static int ncsi_oem_keep_phy_intel(struct ncsi_cmd_arg *nca)
694 unsigned char data[NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN];
697 nca->payload = NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN;
699 memset(data, 0, NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN);
700 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID);
702 data[4] = NCSI_OEM_INTEL_CMD_KEEP_PHY;
704 /* PHY Link up attribute */
709 ret = ncsi_xmit_cmd(nca);
711 netdev_err(nca->ndp->ndev.dev,
712 "NCSI: Failed to transmit cmd 0x%x during configure\n",
717 /* NCSI OEM Command APIs */
718 static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca)
720 unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN];
723 nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN;
725 memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN);
726 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_BCM_ID);
727 data[5] = NCSI_OEM_BCM_CMD_GMA;
731 ret = ncsi_xmit_cmd(nca);
733 netdev_err(nca->ndp->ndev.dev,
734 "NCSI: Failed to transmit cmd 0x%x during configure\n",
739 static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca)
742 u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN];
743 u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)];
747 nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN;
749 memset(&u, 0, sizeof(u));
750 u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID);
751 u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA;
752 u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM;
754 nca->data = u.data_u8;
756 ret = ncsi_xmit_cmd(nca);
758 netdev_err(nca->ndp->ndev.dev,
759 "NCSI: Failed to transmit cmd 0x%x during configure\n",
764 static int ncsi_oem_smaf_mlx(struct ncsi_cmd_arg *nca)
767 u8 data_u8[NCSI_OEM_MLX_CMD_SMAF_LEN];
768 u32 data_u32[NCSI_OEM_MLX_CMD_SMAF_LEN / sizeof(u32)];
772 memset(&u, 0, sizeof(u));
773 u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID);
774 u.data_u8[5] = NCSI_OEM_MLX_CMD_SMAF;
775 u.data_u8[6] = NCSI_OEM_MLX_CMD_SMAF_PARAM;
776 memcpy(&u.data_u8[MLX_SMAF_MAC_ADDR_OFFSET],
777 nca->ndp->ndev.dev->dev_addr, ETH_ALEN);
778 u.data_u8[MLX_SMAF_MED_SUPPORT_OFFSET] =
779 (MLX_MC_RBT_AVL | MLX_MC_RBT_SUPPORT);
781 nca->payload = NCSI_OEM_MLX_CMD_SMAF_LEN;
782 nca->data = u.data_u8;
784 ret = ncsi_xmit_cmd(nca);
786 netdev_err(nca->ndp->ndev.dev,
787 "NCSI: Failed to transmit cmd 0x%x during probe\n",
792 static int ncsi_oem_gma_handler_intel(struct ncsi_cmd_arg *nca)
794 unsigned char data[NCSI_OEM_INTEL_CMD_GMA_LEN];
797 nca->payload = NCSI_OEM_INTEL_CMD_GMA_LEN;
799 memset(data, 0, NCSI_OEM_INTEL_CMD_GMA_LEN);
800 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID);
801 data[4] = NCSI_OEM_INTEL_CMD_GMA;
805 ret = ncsi_xmit_cmd(nca);
807 netdev_err(nca->ndp->ndev.dev,
808 "NCSI: Failed to transmit cmd 0x%x during configure\n",
814 /* OEM Command handlers initialization */
815 static struct ncsi_oem_gma_handler {
817 int (*handler)(struct ncsi_cmd_arg *nca);
818 } ncsi_oem_gma_handlers[] = {
819 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm },
820 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx },
821 { NCSI_OEM_MFR_INTEL_ID, ncsi_oem_gma_handler_intel }
824 static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id)
826 struct ncsi_oem_gma_handler *nch = NULL;
829 /* This function should only be called once, return if flag set */
830 if (nca->ndp->gma_flag == 1)
833 /* Find gma handler for given manufacturer id */
834 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) {
835 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) {
836 if (ncsi_oem_gma_handlers[i].handler)
837 nch = &ncsi_oem_gma_handlers[i];
843 netdev_err(nca->ndp->ndev.dev,
844 "NCSI: No GMA handler available for MFR-ID (0x%x)\n",
849 /* Get Mac address from NCSI device */
850 return nch->handler(nca);
853 /* Determine if a given channel from the channel_queue should be used for Tx */
854 static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp,
855 struct ncsi_channel *nc)
857 struct ncsi_channel_mode *ncm;
858 struct ncsi_channel *channel;
859 struct ncsi_package *np;
861 /* Check if any other channel has Tx enabled; a channel may have already
862 * been configured and removed from the channel queue.
864 NCSI_FOR_EACH_PACKAGE(ndp, np) {
865 if (!ndp->multi_package && np != nc->package)
867 NCSI_FOR_EACH_CHANNEL(np, channel) {
868 ncm = &channel->modes[NCSI_MODE_TX_ENABLE];
874 /* This channel is the preferred channel and has link */
875 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) {
876 np = channel->package;
877 if (np->preferred_channel &&
878 ncsi_channel_has_link(np->preferred_channel)) {
879 return np->preferred_channel == nc;
883 /* This channel has link */
884 if (ncsi_channel_has_link(nc))
887 list_for_each_entry_rcu(channel, &ndp->channel_queue, link)
888 if (ncsi_channel_has_link(channel))
891 /* No other channel has link; default to this one */
895 /* Change the active Tx channel in a multi-channel setup */
896 int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp,
897 struct ncsi_package *package,
898 struct ncsi_channel *disable,
899 struct ncsi_channel *enable)
901 struct ncsi_cmd_arg nca;
902 struct ncsi_channel *nc;
903 struct ncsi_package *np;
906 if (!package->multi_channel && !ndp->multi_package)
907 netdev_warn(ndp->ndev.dev,
908 "NCSI: Trying to update Tx channel in single-channel mode\n");
912 /* Find current channel with Tx enabled */
913 NCSI_FOR_EACH_PACKAGE(ndp, np) {
916 if (!ndp->multi_package && np != package)
919 NCSI_FOR_EACH_CHANNEL(np, nc)
920 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) {
926 /* Find a suitable channel for Tx */
927 NCSI_FOR_EACH_PACKAGE(ndp, np) {
930 if (!ndp->multi_package && np != package)
932 if (!(ndp->package_whitelist & (0x1 << np->id)))
935 if (np->preferred_channel &&
936 ncsi_channel_has_link(np->preferred_channel)) {
937 enable = np->preferred_channel;
941 NCSI_FOR_EACH_CHANNEL(np, nc) {
942 if (!(np->channel_whitelist & 0x1 << nc->id))
944 if (nc->state != NCSI_CHANNEL_ACTIVE)
946 if (ncsi_channel_has_link(nc)) {
953 if (disable == enable)
960 nca.channel = disable->id;
961 nca.package = disable->package->id;
962 nca.type = NCSI_PKT_CMD_DCNT;
963 ret = ncsi_xmit_cmd(&nca);
965 netdev_err(ndp->ndev.dev,
966 "Error %d sending DCNT\n",
970 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id);
972 nca.channel = enable->id;
973 nca.package = enable->package->id;
974 nca.type = NCSI_PKT_CMD_ECNT;
975 ret = ncsi_xmit_cmd(&nca);
977 netdev_err(ndp->ndev.dev,
978 "Error %d sending ECNT\n",
984 static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
986 struct ncsi_package *np = ndp->active_package;
987 struct ncsi_channel *nc = ndp->active_channel;
988 struct ncsi_channel *hot_nc = NULL;
989 struct ncsi_dev *nd = &ndp->ndev;
990 struct net_device *dev = nd->dev;
991 struct ncsi_cmd_arg nca;
997 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
999 case ncsi_dev_state_config:
1000 case ncsi_dev_state_config_sp:
1001 ndp->pending_req_num = 1;
1003 /* Select the specific package */
1004 nca.type = NCSI_PKT_CMD_SP;
1005 if (ndp->flags & NCSI_DEV_HWA)
1009 nca.package = np->id;
1010 nca.channel = NCSI_RESERVED_CHANNEL;
1011 ret = ncsi_xmit_cmd(&nca);
1013 netdev_err(ndp->ndev.dev,
1014 "NCSI: Failed to transmit CMD_SP\n");
1018 nd->state = ncsi_dev_state_config_cis;
1020 case ncsi_dev_state_config_cis:
1021 ndp->pending_req_num = 1;
1023 /* Clear initial state */
1024 nca.type = NCSI_PKT_CMD_CIS;
1025 nca.package = np->id;
1026 nca.channel = nc->id;
1027 ret = ncsi_xmit_cmd(&nca);
1029 netdev_err(ndp->ndev.dev,
1030 "NCSI: Failed to transmit CMD_CIS\n");
1034 nd->state = IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
1035 ? ncsi_dev_state_config_oem_gma
1036 : ncsi_dev_state_config_clear_vids;
1038 case ncsi_dev_state_config_oem_gma:
1039 nd->state = ncsi_dev_state_config_clear_vids;
1041 nca.package = np->id;
1042 nca.channel = nc->id;
1043 ndp->pending_req_num = 1;
1044 if (nc->version.major >= 1 && nc->version.minor >= 2) {
1045 nca.type = NCSI_PKT_CMD_GMCMA;
1046 ret = ncsi_xmit_cmd(&nca);
1048 nca.type = NCSI_PKT_CMD_OEM;
1049 ret = ncsi_gma_handler(&nca, nc->version.mf_id);
1052 schedule_work(&ndp->work);
1055 case ncsi_dev_state_config_clear_vids:
1056 case ncsi_dev_state_config_svf:
1057 case ncsi_dev_state_config_ev:
1058 case ncsi_dev_state_config_sma:
1059 case ncsi_dev_state_config_ebf:
1060 case ncsi_dev_state_config_dgmf:
1061 case ncsi_dev_state_config_ecnt:
1062 case ncsi_dev_state_config_ec:
1063 case ncsi_dev_state_config_ae:
1064 case ncsi_dev_state_config_gls:
1065 ndp->pending_req_num = 1;
1067 nca.package = np->id;
1068 nca.channel = nc->id;
1070 /* Clear any active filters on the channel before setting */
1071 if (nd->state == ncsi_dev_state_config_clear_vids) {
1072 ret = clear_one_vid(ndp, nc, &nca);
1074 nd->state = ncsi_dev_state_config_svf;
1075 schedule_work(&ndp->work);
1079 nd->state = ncsi_dev_state_config_clear_vids;
1080 /* Add known VLAN tags to the filter */
1081 } else if (nd->state == ncsi_dev_state_config_svf) {
1082 ret = set_one_vid(ndp, nc, &nca);
1084 nd->state = ncsi_dev_state_config_ev;
1085 schedule_work(&ndp->work);
1089 nd->state = ncsi_dev_state_config_svf;
1090 /* Enable/Disable the VLAN filter */
1091 } else if (nd->state == ncsi_dev_state_config_ev) {
1092 if (list_empty(&ndp->vlan_vids)) {
1093 nca.type = NCSI_PKT_CMD_DV;
1095 nca.type = NCSI_PKT_CMD_EV;
1096 nca.bytes[3] = NCSI_CAP_VLAN_NO;
1098 nd->state = ncsi_dev_state_config_sma;
1099 } else if (nd->state == ncsi_dev_state_config_sma) {
1100 /* Use first entry in unicast filter table. Note that
1101 * the MAC filter table starts from entry 1 instead of
1104 nca.type = NCSI_PKT_CMD_SMA;
1105 for (index = 0; index < 6; index++)
1106 nca.bytes[index] = dev->dev_addr[index];
1109 nd->state = ncsi_dev_state_config_ebf;
1110 } else if (nd->state == ncsi_dev_state_config_ebf) {
1111 nca.type = NCSI_PKT_CMD_EBF;
1112 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap;
1113 /* if multicast global filtering is supported then
1114 * disable it so that all multicast packet will be
1115 * forwarded to management controller
1117 if (nc->caps[NCSI_CAP_GENERIC].cap &
1118 NCSI_CAP_GENERIC_MC)
1119 nd->state = ncsi_dev_state_config_dgmf;
1120 else if (ncsi_channel_is_tx(ndp, nc))
1121 nd->state = ncsi_dev_state_config_ecnt;
1123 nd->state = ncsi_dev_state_config_ec;
1124 } else if (nd->state == ncsi_dev_state_config_dgmf) {
1125 nca.type = NCSI_PKT_CMD_DGMF;
1126 if (ncsi_channel_is_tx(ndp, nc))
1127 nd->state = ncsi_dev_state_config_ecnt;
1129 nd->state = ncsi_dev_state_config_ec;
1130 } else if (nd->state == ncsi_dev_state_config_ecnt) {
1131 if (np->preferred_channel &&
1132 nc != np->preferred_channel)
1133 netdev_info(ndp->ndev.dev,
1134 "NCSI: Tx failed over to channel %u\n",
1136 nca.type = NCSI_PKT_CMD_ECNT;
1137 nd->state = ncsi_dev_state_config_ec;
1138 } else if (nd->state == ncsi_dev_state_config_ec) {
1139 /* Enable AEN if it's supported */
1140 nca.type = NCSI_PKT_CMD_EC;
1141 nd->state = ncsi_dev_state_config_ae;
1142 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK))
1143 nd->state = ncsi_dev_state_config_gls;
1144 } else if (nd->state == ncsi_dev_state_config_ae) {
1145 nca.type = NCSI_PKT_CMD_AE;
1147 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap;
1148 nd->state = ncsi_dev_state_config_gls;
1149 } else if (nd->state == ncsi_dev_state_config_gls) {
1150 nca.type = NCSI_PKT_CMD_GLS;
1151 nd->state = ncsi_dev_state_config_done;
1154 ret = ncsi_xmit_cmd(&nca);
1156 netdev_err(ndp->ndev.dev,
1157 "NCSI: Failed to transmit CMD %x\n",
1162 case ncsi_dev_state_config_done:
1163 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n",
1165 spin_lock_irqsave(&nc->lock, flags);
1166 nc->state = NCSI_CHANNEL_ACTIVE;
1168 if (ndp->flags & NCSI_DEV_RESET) {
1169 /* A reset event happened during config, start it now */
1170 nc->reconfigure_needed = false;
1171 spin_unlock_irqrestore(&nc->lock, flags);
1176 if (nc->reconfigure_needed) {
1177 /* This channel's configuration has been updated
1178 * part-way during the config state - start the
1179 * channel configuration over
1181 nc->reconfigure_needed = false;
1182 nc->state = NCSI_CHANNEL_INACTIVE;
1183 spin_unlock_irqrestore(&nc->lock, flags);
1185 spin_lock_irqsave(&ndp->lock, flags);
1186 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1187 spin_unlock_irqrestore(&ndp->lock, flags);
1189 netdev_dbg(dev, "Dirty NCSI channel state reset\n");
1190 ncsi_process_next_channel(ndp);
1194 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
1198 netdev_dbg(ndp->ndev.dev,
1199 "NCSI: channel %u link down after config\n",
1202 spin_unlock_irqrestore(&nc->lock, flags);
1204 /* Update the hot channel */
1205 spin_lock_irqsave(&ndp->lock, flags);
1206 ndp->hot_channel = hot_nc;
1207 spin_unlock_irqrestore(&ndp->lock, flags);
1209 ncsi_start_channel_monitor(nc);
1210 ncsi_process_next_channel(ndp);
1213 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n",
1220 ncsi_report_link(ndp, true);
1223 static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
1225 struct ncsi_channel *nc, *found, *hot_nc;
1226 struct ncsi_channel_mode *ncm;
1227 unsigned long flags, cflags;
1228 struct ncsi_package *np;
1231 spin_lock_irqsave(&ndp->lock, flags);
1232 hot_nc = ndp->hot_channel;
1233 spin_unlock_irqrestore(&ndp->lock, flags);
1235 /* By default the search is done once an inactive channel with up
1236 * link is found, unless a preferred channel is set.
1237 * If multi_package or multi_channel are configured all channels in the
1238 * whitelist are added to the channel queue.
1242 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1243 if (!(ndp->package_whitelist & (0x1 << np->id)))
1245 NCSI_FOR_EACH_CHANNEL(np, nc) {
1246 if (!(np->channel_whitelist & (0x1 << nc->id)))
1249 spin_lock_irqsave(&nc->lock, cflags);
1251 if (!list_empty(&nc->link) ||
1252 nc->state != NCSI_CHANNEL_INACTIVE) {
1253 spin_unlock_irqrestore(&nc->lock, cflags);
1263 ncm = &nc->modes[NCSI_MODE_LINK];
1264 if (ncm->data[2] & 0x1) {
1269 /* If multi_channel is enabled configure all valid
1270 * channels whether or not they currently have link
1271 * so they will have AENs enabled.
1273 if (with_link || np->multi_channel) {
1274 spin_lock_irqsave(&ndp->lock, flags);
1275 list_add_tail_rcu(&nc->link,
1276 &ndp->channel_queue);
1277 spin_unlock_irqrestore(&ndp->lock, flags);
1279 netdev_dbg(ndp->ndev.dev,
1280 "NCSI: Channel %u added to queue (link %s)\n",
1282 ncm->data[2] & 0x1 ? "up" : "down");
1285 spin_unlock_irqrestore(&nc->lock, cflags);
1287 if (with_link && !np->multi_channel)
1290 if (with_link && !ndp->multi_package)
1294 if (list_empty(&ndp->channel_queue) && found) {
1295 netdev_info(ndp->ndev.dev,
1296 "NCSI: No channel with link found, configuring channel %u\n",
1298 spin_lock_irqsave(&ndp->lock, flags);
1299 list_add_tail_rcu(&found->link, &ndp->channel_queue);
1300 spin_unlock_irqrestore(&ndp->lock, flags);
1301 } else if (!found) {
1302 netdev_warn(ndp->ndev.dev,
1303 "NCSI: No channel found to configure!\n");
1304 ncsi_report_link(ndp, true);
1308 return ncsi_process_next_channel(ndp);
1311 static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp)
1313 struct ncsi_package *np;
1314 struct ncsi_channel *nc;
1316 bool has_channel = false;
1318 /* The hardware arbitration is disabled if any one channel
1319 * doesn't support explicitly.
1321 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1322 NCSI_FOR_EACH_CHANNEL(np, nc) {
1325 cap = nc->caps[NCSI_CAP_GENERIC].cap;
1326 if (!(cap & NCSI_CAP_GENERIC_HWA) ||
1327 (cap & NCSI_CAP_GENERIC_HWA_MASK) !=
1328 NCSI_CAP_GENERIC_HWA_SUPPORT) {
1329 ndp->flags &= ~NCSI_DEV_HWA;
1336 ndp->flags |= NCSI_DEV_HWA;
1340 ndp->flags &= ~NCSI_DEV_HWA;
1344 static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
1346 struct ncsi_dev *nd = &ndp->ndev;
1347 struct ncsi_package *np;
1348 struct ncsi_channel *nc;
1349 struct ncsi_cmd_arg nca;
1350 unsigned char index;
1354 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
1355 switch (nd->state) {
1356 case ncsi_dev_state_probe:
1357 nd->state = ncsi_dev_state_probe_deselect;
1359 case ncsi_dev_state_probe_deselect:
1360 ndp->pending_req_num = 8;
1362 /* Deselect all possible packages */
1363 nca.type = NCSI_PKT_CMD_DP;
1364 nca.channel = NCSI_RESERVED_CHANNEL;
1365 for (index = 0; index < 8; index++) {
1366 nca.package = index;
1367 ret = ncsi_xmit_cmd(&nca);
1372 nd->state = ncsi_dev_state_probe_package;
1374 case ncsi_dev_state_probe_package:
1375 ndp->pending_req_num = 1;
1377 nca.type = NCSI_PKT_CMD_SP;
1379 nca.package = ndp->package_probe_id;
1380 nca.channel = NCSI_RESERVED_CHANNEL;
1381 ret = ncsi_xmit_cmd(&nca);
1384 nd->state = ncsi_dev_state_probe_channel;
1386 case ncsi_dev_state_probe_channel:
1387 ndp->active_package = ncsi_find_package(ndp,
1388 ndp->package_probe_id);
1389 if (!ndp->active_package) {
1391 nd->state = ncsi_dev_state_probe_dp;
1392 schedule_work(&ndp->work);
1395 nd->state = ncsi_dev_state_probe_cis;
1396 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) &&
1397 ndp->mlx_multi_host)
1398 nd->state = ncsi_dev_state_probe_mlx_gma;
1400 schedule_work(&ndp->work);
1402 case ncsi_dev_state_probe_mlx_gma:
1403 ndp->pending_req_num = 1;
1405 nca.type = NCSI_PKT_CMD_OEM;
1406 nca.package = ndp->active_package->id;
1408 ret = ncsi_oem_gma_handler_mlx(&nca);
1412 nd->state = ncsi_dev_state_probe_mlx_smaf;
1414 case ncsi_dev_state_probe_mlx_smaf:
1415 ndp->pending_req_num = 1;
1417 nca.type = NCSI_PKT_CMD_OEM;
1418 nca.package = ndp->active_package->id;
1420 ret = ncsi_oem_smaf_mlx(&nca);
1424 nd->state = ncsi_dev_state_probe_cis;
1426 case ncsi_dev_state_probe_cis:
1427 ndp->pending_req_num = NCSI_RESERVED_CHANNEL;
1429 /* Clear initial state */
1430 nca.type = NCSI_PKT_CMD_CIS;
1431 nca.package = ndp->active_package->id;
1432 for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) {
1433 nca.channel = index;
1434 ret = ncsi_xmit_cmd(&nca);
1439 nd->state = ncsi_dev_state_probe_gvi;
1440 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY))
1441 nd->state = ncsi_dev_state_probe_keep_phy;
1443 case ncsi_dev_state_probe_keep_phy:
1444 ndp->pending_req_num = 1;
1446 nca.type = NCSI_PKT_CMD_OEM;
1447 nca.package = ndp->active_package->id;
1449 ret = ncsi_oem_keep_phy_intel(&nca);
1453 nd->state = ncsi_dev_state_probe_gvi;
1455 case ncsi_dev_state_probe_gvi:
1456 case ncsi_dev_state_probe_gc:
1457 case ncsi_dev_state_probe_gls:
1458 np = ndp->active_package;
1459 ndp->pending_req_num = np->channel_num;
1461 /* Retrieve version, capability or link status */
1462 if (nd->state == ncsi_dev_state_probe_gvi)
1463 nca.type = NCSI_PKT_CMD_GVI;
1464 else if (nd->state == ncsi_dev_state_probe_gc)
1465 nca.type = NCSI_PKT_CMD_GC;
1467 nca.type = NCSI_PKT_CMD_GLS;
1469 nca.package = np->id;
1470 NCSI_FOR_EACH_CHANNEL(np, nc) {
1471 nca.channel = nc->id;
1472 ret = ncsi_xmit_cmd(&nca);
1477 if (nd->state == ncsi_dev_state_probe_gvi)
1478 nd->state = ncsi_dev_state_probe_gc;
1479 else if (nd->state == ncsi_dev_state_probe_gc)
1480 nd->state = ncsi_dev_state_probe_gls;
1482 nd->state = ncsi_dev_state_probe_dp;
1484 case ncsi_dev_state_probe_dp:
1485 ndp->pending_req_num = 1;
1487 /* Deselect the current package */
1488 nca.type = NCSI_PKT_CMD_DP;
1489 nca.package = ndp->package_probe_id;
1490 nca.channel = NCSI_RESERVED_CHANNEL;
1491 ret = ncsi_xmit_cmd(&nca);
1495 /* Probe next package */
1496 ndp->package_probe_id++;
1497 if (ndp->package_probe_id >= 8) {
1498 /* Probe finished */
1499 ndp->flags |= NCSI_DEV_PROBED;
1502 nd->state = ncsi_dev_state_probe_package;
1503 ndp->active_package = NULL;
1506 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n",
1510 if (ndp->flags & NCSI_DEV_PROBED) {
1511 /* Check if all packages have HWA support */
1512 ncsi_check_hwa(ndp);
1513 ncsi_choose_active_channel(ndp);
1518 netdev_err(ndp->ndev.dev,
1519 "NCSI: Failed to transmit cmd 0x%x during probe\n",
1521 ncsi_report_link(ndp, true);
1524 static void ncsi_dev_work(struct work_struct *work)
1526 struct ncsi_dev_priv *ndp = container_of(work,
1527 struct ncsi_dev_priv, work);
1528 struct ncsi_dev *nd = &ndp->ndev;
1530 switch (nd->state & ncsi_dev_state_major) {
1531 case ncsi_dev_state_probe:
1532 ncsi_probe_channel(ndp);
1534 case ncsi_dev_state_suspend:
1535 ncsi_suspend_channel(ndp);
1537 case ncsi_dev_state_config:
1538 ncsi_configure_channel(ndp);
1541 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n",
1546 int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
1548 struct ncsi_channel *nc;
1550 unsigned long flags;
1552 spin_lock_irqsave(&ndp->lock, flags);
1553 nc = list_first_or_null_rcu(&ndp->channel_queue,
1554 struct ncsi_channel, link);
1556 spin_unlock_irqrestore(&ndp->lock, flags);
1560 list_del_init(&nc->link);
1561 spin_unlock_irqrestore(&ndp->lock, flags);
1563 spin_lock_irqsave(&nc->lock, flags);
1564 old_state = nc->state;
1565 nc->state = NCSI_CHANNEL_INVISIBLE;
1566 spin_unlock_irqrestore(&nc->lock, flags);
1568 ndp->active_channel = nc;
1569 ndp->active_package = nc->package;
1571 switch (old_state) {
1572 case NCSI_CHANNEL_INACTIVE:
1573 ndp->ndev.state = ncsi_dev_state_config;
1574 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n",
1576 ncsi_configure_channel(ndp);
1578 case NCSI_CHANNEL_ACTIVE:
1579 ndp->ndev.state = ncsi_dev_state_suspend;
1580 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n",
1582 ncsi_suspend_channel(ndp);
1585 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n",
1586 old_state, nc->package->id, nc->id);
1587 ncsi_report_link(ndp, false);
1594 ndp->active_channel = NULL;
1595 ndp->active_package = NULL;
1596 if (ndp->flags & NCSI_DEV_RESHUFFLE) {
1597 ndp->flags &= ~NCSI_DEV_RESHUFFLE;
1598 return ncsi_choose_active_channel(ndp);
1601 ncsi_report_link(ndp, false);
1605 static int ncsi_kick_channels(struct ncsi_dev_priv *ndp)
1607 struct ncsi_dev *nd = &ndp->ndev;
1608 struct ncsi_channel *nc;
1609 struct ncsi_package *np;
1610 unsigned long flags;
1613 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1614 NCSI_FOR_EACH_CHANNEL(np, nc) {
1615 spin_lock_irqsave(&nc->lock, flags);
1617 /* Channels may be busy, mark dirty instead of
1619 * a) not ACTIVE (configured)
1620 * b) in the channel_queue (to be configured)
1621 * c) it's ndev is in the config state
1623 if (nc->state != NCSI_CHANNEL_ACTIVE) {
1624 if ((ndp->ndev.state & 0xff00) ==
1625 ncsi_dev_state_config ||
1626 !list_empty(&nc->link)) {
1628 "NCSI: channel %p marked dirty\n",
1630 nc->reconfigure_needed = true;
1632 spin_unlock_irqrestore(&nc->lock, flags);
1636 spin_unlock_irqrestore(&nc->lock, flags);
1638 ncsi_stop_channel_monitor(nc);
1639 spin_lock_irqsave(&nc->lock, flags);
1640 nc->state = NCSI_CHANNEL_INACTIVE;
1641 spin_unlock_irqrestore(&nc->lock, flags);
1643 spin_lock_irqsave(&ndp->lock, flags);
1644 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1645 spin_unlock_irqrestore(&ndp->lock, flags);
1647 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc);
1655 int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1657 struct ncsi_dev_priv *ndp;
1658 unsigned int n_vids = 0;
1659 struct vlan_vid *vlan;
1660 struct ncsi_dev *nd;
1666 nd = ncsi_find_dev(dev);
1668 netdev_warn(dev, "NCSI: No net_device?\n");
1672 ndp = TO_NCSI_DEV_PRIV(nd);
1674 /* Add the VLAN id to our internal list */
1675 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
1677 if (vlan->vid == vid) {
1678 netdev_dbg(dev, "NCSI: vid %u already registered\n",
1683 if (n_vids >= NCSI_MAX_VLAN_VIDS) {
1685 "tried to add vlan id %u but NCSI max already registered (%u)\n",
1686 vid, NCSI_MAX_VLAN_VIDS);
1690 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1694 vlan->proto = proto;
1696 list_add_rcu(&vlan->list, &ndp->vlan_vids);
1698 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid);
1700 found = ncsi_kick_channels(ndp) != 0;
1702 return found ? ncsi_process_next_channel(ndp) : 0;
1704 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid);
1706 int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1708 struct vlan_vid *vlan, *tmp;
1709 struct ncsi_dev_priv *ndp;
1710 struct ncsi_dev *nd;
1716 nd = ncsi_find_dev(dev);
1718 netdev_warn(dev, "NCSI: no net_device?\n");
1722 ndp = TO_NCSI_DEV_PRIV(nd);
1724 /* Remove the VLAN id from our internal list */
1725 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list)
1726 if (vlan->vid == vid) {
1727 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid);
1728 list_del_rcu(&vlan->list);
1734 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid);
1738 found = ncsi_kick_channels(ndp) != 0;
1740 return found ? ncsi_process_next_channel(ndp) : 0;
1742 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid);
1744 struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
1745 void (*handler)(struct ncsi_dev *ndev))
1747 struct ncsi_dev_priv *ndp;
1748 struct ncsi_dev *nd;
1749 struct platform_device *pdev;
1750 struct device_node *np;
1751 unsigned long flags;
1754 /* Check if the device has been registered or not */
1755 nd = ncsi_find_dev(dev);
1759 /* Create NCSI device */
1760 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC);
1765 nd->state = ncsi_dev_state_registered;
1767 nd->handler = handler;
1768 ndp->pending_req_num = 0;
1769 INIT_LIST_HEAD(&ndp->channel_queue);
1770 INIT_LIST_HEAD(&ndp->vlan_vids);
1771 INIT_WORK(&ndp->work, ncsi_dev_work);
1772 ndp->package_whitelist = UINT_MAX;
1774 /* Initialize private NCSI device */
1775 spin_lock_init(&ndp->lock);
1776 INIT_LIST_HEAD(&ndp->packages);
1777 ndp->request_id = NCSI_REQ_START_IDX;
1778 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) {
1779 ndp->requests[i].id = i;
1780 ndp->requests[i].ndp = ndp;
1781 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0);
1784 spin_lock_irqsave(&ncsi_dev_lock, flags);
1785 list_add_tail_rcu(&ndp->node, &ncsi_dev_list);
1786 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1788 /* Register NCSI packet Rx handler */
1789 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI);
1790 ndp->ptype.func = ncsi_rcv_rsp;
1791 ndp->ptype.dev = dev;
1792 dev_add_pack(&ndp->ptype);
1794 pdev = to_platform_device(dev->dev.parent);
1796 np = pdev->dev.of_node;
1797 if (np && (of_property_read_bool(np, "mellanox,multi-host") ||
1798 of_property_read_bool(np, "mlx,multi-host")))
1799 ndp->mlx_multi_host = true;
1804 EXPORT_SYMBOL_GPL(ncsi_register_dev);
1806 int ncsi_start_dev(struct ncsi_dev *nd)
1808 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1810 if (nd->state != ncsi_dev_state_registered &&
1811 nd->state != ncsi_dev_state_functional)
1814 if (!(ndp->flags & NCSI_DEV_PROBED)) {
1815 ndp->package_probe_id = 0;
1816 nd->state = ncsi_dev_state_probe;
1817 schedule_work(&ndp->work);
1821 return ncsi_reset_dev(nd);
1823 EXPORT_SYMBOL_GPL(ncsi_start_dev);
1825 void ncsi_stop_dev(struct ncsi_dev *nd)
1827 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1828 struct ncsi_package *np;
1829 struct ncsi_channel *nc;
1832 unsigned long flags;
1834 /* Stop the channel monitor on any active channels. Don't reset the
1835 * channel state so we know which were active when ncsi_start_dev()
1838 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1839 NCSI_FOR_EACH_CHANNEL(np, nc) {
1840 ncsi_stop_channel_monitor(nc);
1842 spin_lock_irqsave(&nc->lock, flags);
1843 chained = !list_empty(&nc->link);
1844 old_state = nc->state;
1845 spin_unlock_irqrestore(&nc->lock, flags);
1847 WARN_ON_ONCE(chained ||
1848 old_state == NCSI_CHANNEL_INVISIBLE);
1852 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n");
1853 ncsi_report_link(ndp, true);
1855 EXPORT_SYMBOL_GPL(ncsi_stop_dev);
1857 int ncsi_reset_dev(struct ncsi_dev *nd)
1859 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1860 struct ncsi_channel *nc, *active, *tmp;
1861 struct ncsi_package *np;
1862 unsigned long flags;
1864 spin_lock_irqsave(&ndp->lock, flags);
1866 if (!(ndp->flags & NCSI_DEV_RESET)) {
1867 /* Haven't been called yet, check states */
1868 switch (nd->state & ncsi_dev_state_major) {
1869 case ncsi_dev_state_registered:
1870 case ncsi_dev_state_probe:
1871 /* Not even probed yet - do nothing */
1872 spin_unlock_irqrestore(&ndp->lock, flags);
1874 case ncsi_dev_state_suspend:
1875 case ncsi_dev_state_config:
1876 /* Wait for the channel to finish its suspend/config
1877 * operation; once it finishes it will check for
1878 * NCSI_DEV_RESET and reset the state.
1880 ndp->flags |= NCSI_DEV_RESET;
1881 spin_unlock_irqrestore(&ndp->lock, flags);
1885 switch (nd->state) {
1886 case ncsi_dev_state_suspend_done:
1887 case ncsi_dev_state_config_done:
1888 case ncsi_dev_state_functional:
1892 /* Current reset operation happening */
1893 spin_unlock_irqrestore(&ndp->lock, flags);
1898 if (!list_empty(&ndp->channel_queue)) {
1899 /* Clear any channel queue we may have interrupted */
1900 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link)
1901 list_del_init(&nc->link);
1903 spin_unlock_irqrestore(&ndp->lock, flags);
1906 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1907 NCSI_FOR_EACH_CHANNEL(np, nc) {
1908 spin_lock_irqsave(&nc->lock, flags);
1910 if (nc->state == NCSI_CHANNEL_ACTIVE) {
1912 nc->state = NCSI_CHANNEL_INVISIBLE;
1913 spin_unlock_irqrestore(&nc->lock, flags);
1914 ncsi_stop_channel_monitor(nc);
1918 spin_unlock_irqrestore(&nc->lock, flags);
1926 spin_lock_irqsave(&ndp->lock, flags);
1927 ndp->flags &= ~NCSI_DEV_RESET;
1928 spin_unlock_irqrestore(&ndp->lock, flags);
1929 return ncsi_choose_active_channel(ndp);
1932 spin_lock_irqsave(&ndp->lock, flags);
1933 ndp->flags |= NCSI_DEV_RESET;
1934 ndp->active_channel = active;
1935 ndp->active_package = active->package;
1936 spin_unlock_irqrestore(&ndp->lock, flags);
1938 nd->state = ncsi_dev_state_suspend;
1939 schedule_work(&ndp->work);
1943 void ncsi_unregister_dev(struct ncsi_dev *nd)
1945 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1946 struct ncsi_package *np, *tmp;
1947 unsigned long flags;
1949 dev_remove_pack(&ndp->ptype);
1951 list_for_each_entry_safe(np, tmp, &ndp->packages, node)
1952 ncsi_remove_package(np);
1954 spin_lock_irqsave(&ncsi_dev_lock, flags);
1955 list_del_rcu(&ndp->node);
1956 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1960 EXPORT_SYMBOL_GPL(ncsi_unregister_dev);