| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Gavin Shan | 4937 | 54.45% | 18 | 33.33% |
| Samuel Mendoza-Jonas | 2991 | 32.99% | 12 | 22.22% |
| Vijay Khemka | 667 | 7.36% | 5 | 9.26% |
| Ivan Mikhaylov | 261 | 2.88% | 3 | 5.56% |
| Justin.Lee1 | 47 | 0.52% | 1 | 1.85% |
| Peter Delevoryas | 41 | 0.45% | 2 | 3.70% |
| Arnd Bergmann | 33 | 0.36% | 2 | 3.70% |
| Kees Cook | 30 | 0.33% | 2 | 3.70% |
| Milton D. Miller II | 29 | 0.32% | 1 | 1.85% |
| Joel Stanley | 12 | 0.13% | 2 | 3.70% |
| Krzysztof Kozlowski | 8 | 0.09% | 1 | 1.85% |
| Gustavo A. R. Silva | 4 | 0.04% | 1 | 1.85% |
| Yury Norov | 2 | 0.02% | 1 | 1.85% |
| Rob Herring | 2 | 0.02% | 1 | 1.85% |
| Thomas Gleixner | 2 | 0.02% | 1 | 1.85% |
| Zheng Yongjun | 1 | 0.01% | 1 | 1.85% |
| Total | 9067 | 54 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright Gavin Shan, IBM Corporation 2016. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/netdevice.h> #include <linux/skbuff.h> #include <linux/of.h> #include <linux/platform_device.h> #include <net/ncsi.h> #include <net/net_namespace.h> #include <net/sock.h> #include <net/addrconf.h> #include <net/ipv6.h> #include <net/genetlink.h> #include "internal.h" #include "ncsi-pkt.h" #include "ncsi-netlink.h" LIST_HEAD(ncsi_dev_list); DEFINE_SPINLOCK(ncsi_dev_lock); bool ncsi_channel_has_link(struct ncsi_channel *channel) { return !!(channel->modes[NCSI_MODE_LINK].data[2] & 0x1); } bool ncsi_channel_is_last(struct ncsi_dev_priv *ndp, struct ncsi_channel *channel) { struct ncsi_package *np; struct ncsi_channel *nc; NCSI_FOR_EACH_PACKAGE(ndp, np) NCSI_FOR_EACH_CHANNEL(np, nc) { if (nc == channel) continue; if (nc->state == NCSI_CHANNEL_ACTIVE && ncsi_channel_has_link(nc)) return false; } return true; } static void ncsi_report_link(struct ncsi_dev_priv *ndp, bool force_down) { struct ncsi_dev *nd = &ndp->ndev; struct ncsi_package *np; struct ncsi_channel *nc; unsigned long flags; nd->state = ncsi_dev_state_functional; if (force_down) { nd->link_up = 0; goto report; } nd->link_up = 0; NCSI_FOR_EACH_PACKAGE(ndp, np) { NCSI_FOR_EACH_CHANNEL(np, nc) { spin_lock_irqsave(&nc->lock, flags); if (!list_empty(&nc->link) || nc->state != NCSI_CHANNEL_ACTIVE) { spin_unlock_irqrestore(&nc->lock, flags); continue; } if (ncsi_channel_has_link(nc)) { spin_unlock_irqrestore(&nc->lock, flags); nd->link_up = 1; goto report; } spin_unlock_irqrestore(&nc->lock, flags); } } report: nd->handler(nd); } static void ncsi_channel_monitor(struct timer_list *t) { struct ncsi_channel *nc = from_timer(nc, t, monitor.timer); struct ncsi_package *np = nc->package; struct ncsi_dev_priv *ndp = np->ndp; struct ncsi_channel_mode *ncm; struct ncsi_cmd_arg nca; bool enabled, chained; unsigned int monitor_state; unsigned long flags; int state, ret; spin_lock_irqsave(&nc->lock, flags); state = nc->state; chained = !list_empty(&nc->link); enabled = nc->monitor.enabled; monitor_state = nc->monitor.state; spin_unlock_irqrestore(&nc->lock, flags); if (!enabled) return; /* expected race disabling timer */ if (WARN_ON_ONCE(chained)) goto bad_state; if (state != NCSI_CHANNEL_INACTIVE && state != NCSI_CHANNEL_ACTIVE) { bad_state: netdev_warn(ndp->ndev.dev, "Bad NCSI monitor state channel %d 0x%x %s queue\n", nc->id, state, chained ? "on" : "off"); spin_lock_irqsave(&nc->lock, flags); nc->monitor.enabled = false; spin_unlock_irqrestore(&nc->lock, flags); return; } switch (monitor_state) { case NCSI_CHANNEL_MONITOR_START: case NCSI_CHANNEL_MONITOR_RETRY: nca.ndp = ndp; nca.package = np->id; nca.channel = nc->id; nca.type = NCSI_PKT_CMD_GLS; nca.req_flags = 0; ret = ncsi_xmit_cmd(&nca); if (ret) netdev_err(ndp->ndev.dev, "Error %d sending GLS\n", ret); break; case NCSI_CHANNEL_MONITOR_WAIT ... NCSI_CHANNEL_MONITOR_WAIT_MAX: break; default: netdev_err(ndp->ndev.dev, "NCSI Channel %d timed out!\n", nc->id); ncsi_report_link(ndp, true); ndp->flags |= NCSI_DEV_RESHUFFLE; ncm = &nc->modes[NCSI_MODE_LINK]; spin_lock_irqsave(&nc->lock, flags); nc->monitor.enabled = false; nc->state = NCSI_CHANNEL_INVISIBLE; ncm->data[2] &= ~0x1; spin_unlock_irqrestore(&nc->lock, flags); spin_lock_irqsave(&ndp->lock, flags); nc->state = NCSI_CHANNEL_ACTIVE; list_add_tail_rcu(&nc->link, &ndp->channel_queue); spin_unlock_irqrestore(&ndp->lock, flags); ncsi_process_next_channel(ndp); return; } spin_lock_irqsave(&nc->lock, flags); nc->monitor.state++; spin_unlock_irqrestore(&nc->lock, flags); mod_timer(&nc->monitor.timer, jiffies + HZ); } void ncsi_start_channel_monitor(struct ncsi_channel *nc) { unsigned long flags; spin_lock_irqsave(&nc->lock, flags); WARN_ON_ONCE(nc->monitor.enabled); nc->monitor.enabled = true; nc->monitor.state = NCSI_CHANNEL_MONITOR_START; spin_unlock_irqrestore(&nc->lock, flags); mod_timer(&nc->monitor.timer, jiffies + HZ); } void ncsi_stop_channel_monitor(struct ncsi_channel *nc) { unsigned long flags; spin_lock_irqsave(&nc->lock, flags); if (!nc->monitor.enabled) { spin_unlock_irqrestore(&nc->lock, flags); return; } nc->monitor.enabled = false; spin_unlock_irqrestore(&nc->lock, flags); del_timer_sync(&nc->monitor.timer); } struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np, unsigned char id) { struct ncsi_channel *nc; NCSI_FOR_EACH_CHANNEL(np, nc) { if (nc->id == id) return nc; } return NULL; } struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, unsigned char id) { struct ncsi_channel *nc, *tmp; int index; unsigned long flags; nc = kzalloc(sizeof(*nc), GFP_ATOMIC); if (!nc) return NULL; nc->id = id; nc->package = np; nc->state = NCSI_CHANNEL_INACTIVE; nc->monitor.enabled = false; timer_setup(&nc->monitor.timer, ncsi_channel_monitor, 0); spin_lock_init(&nc->lock); INIT_LIST_HEAD(&nc->link); for (index = 0; index < NCSI_CAP_MAX; index++) nc->caps[index].index = index; for (index = 0; index < NCSI_MODE_MAX; index++) nc->modes[index].index = index; spin_lock_irqsave(&np->lock, flags); tmp = ncsi_find_channel(np, id); if (tmp) { spin_unlock_irqrestore(&np->lock, flags); kfree(nc); return tmp; } list_add_tail_rcu(&nc->node, &np->channels); np->channel_num++; spin_unlock_irqrestore(&np->lock, flags); return nc; } static void ncsi_remove_channel(struct ncsi_channel *nc) { struct ncsi_package *np = nc->package; unsigned long flags; spin_lock_irqsave(&nc->lock, flags); /* Release filters */ kfree(nc->mac_filter.addrs); kfree(nc->vlan_filter.vids); nc->state = NCSI_CHANNEL_INACTIVE; spin_unlock_irqrestore(&nc->lock, flags); ncsi_stop_channel_monitor(nc); /* Remove and free channel */ spin_lock_irqsave(&np->lock, flags); list_del_rcu(&nc->node); np->channel_num--; spin_unlock_irqrestore(&np->lock, flags); kfree(nc); } struct ncsi_package *ncsi_find_package(struct ncsi_dev_priv *ndp, unsigned char id) { struct ncsi_package *np; NCSI_FOR_EACH_PACKAGE(ndp, np) { if (np->id == id) return np; } return NULL; } struct ncsi_package *ncsi_add_package(struct ncsi_dev_priv *ndp, unsigned char id) { struct ncsi_package *np, *tmp; unsigned long flags; np = kzalloc(sizeof(*np), GFP_ATOMIC); if (!np) return NULL; np->id = id; np->ndp = ndp; spin_lock_init(&np->lock); INIT_LIST_HEAD(&np->channels); np->channel_whitelist = UINT_MAX; spin_lock_irqsave(&ndp->lock, flags); tmp = ncsi_find_package(ndp, id); if (tmp) { spin_unlock_irqrestore(&ndp->lock, flags); kfree(np); return tmp; } list_add_tail_rcu(&np->node, &ndp->packages); ndp->package_num++; spin_unlock_irqrestore(&ndp->lock, flags); return np; } void ncsi_remove_package(struct ncsi_package *np) { struct ncsi_dev_priv *ndp = np->ndp; struct ncsi_channel *nc, *tmp; unsigned long flags; /* Release all child channels */ list_for_each_entry_safe(nc, tmp, &np->channels, node) ncsi_remove_channel(nc); /* Remove and free package */ spin_lock_irqsave(&ndp->lock, flags); list_del_rcu(&np->node); ndp->package_num--; spin_unlock_irqrestore(&ndp->lock, flags); kfree(np); } void ncsi_find_package_and_channel(struct ncsi_dev_priv *ndp, unsigned char id, struct ncsi_package **np, struct ncsi_channel **nc) { struct ncsi_package *p; struct ncsi_channel *c; p = ncsi_find_package(ndp, NCSI_PACKAGE_INDEX(id)); c = p ? ncsi_find_channel(p, NCSI_CHANNEL_INDEX(id)) : NULL; if (np) *np = p; if (nc) *nc = c; } /* For two consecutive NCSI commands, the packet IDs shouldn't * be same. Otherwise, the bogus response might be replied. So * the available IDs are allocated in round-robin fashion. */ struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp, unsigned int req_flags) { struct ncsi_request *nr = NULL; int i, limit = ARRAY_SIZE(ndp->requests); unsigned long flags; /* Check if there is one available request until the ceiling */ spin_lock_irqsave(&ndp->lock, flags); for (i = ndp->request_id; i < limit; i++) { if (ndp->requests[i].used) continue; nr = &ndp->requests[i]; nr->used = true; nr->flags = req_flags; ndp->request_id = i + 1; goto found; } /* Fail back to check from the starting cursor */ for (i = NCSI_REQ_START_IDX; i < ndp->request_id; i++) { if (ndp->requests[i].used) continue; nr = &ndp->requests[i]; nr->used = true; nr->flags = req_flags; ndp->request_id = i + 1; goto found; } found: spin_unlock_irqrestore(&ndp->lock, flags); return nr; } void ncsi_free_request(struct ncsi_request *nr) { struct ncsi_dev_priv *ndp = nr->ndp; struct sk_buff *cmd, *rsp; unsigned long flags; bool driven; if (nr->enabled) { nr->enabled = false; del_timer_sync(&nr->timer); } spin_lock_irqsave(&ndp->lock, flags); cmd = nr->cmd; rsp = nr->rsp; nr->cmd = NULL; nr->rsp = NULL; nr->used = false; driven = !!(nr->flags & NCSI_REQ_FLAG_EVENT_DRIVEN); spin_unlock_irqrestore(&ndp->lock, flags); if (driven && cmd && --ndp->pending_req_num == 0) schedule_work(&ndp->work); /* Release command and response */ consume_skb(cmd); consume_skb(rsp); } struct ncsi_dev *ncsi_find_dev(struct net_device *dev) { struct ncsi_dev_priv *ndp; NCSI_FOR_EACH_DEV(ndp) { if (ndp->ndev.dev == dev) return &ndp->ndev; } return NULL; } static void ncsi_request_timeout(struct timer_list *t) { struct ncsi_request *nr = from_timer(nr, t, timer); struct ncsi_dev_priv *ndp = nr->ndp; struct ncsi_cmd_pkt *cmd; struct ncsi_package *np; struct ncsi_channel *nc; unsigned long flags; /* If the request already had associated response, * let the response handler to release it. */ spin_lock_irqsave(&ndp->lock, flags); nr->enabled = false; if (nr->rsp || !nr->cmd) { spin_unlock_irqrestore(&ndp->lock, flags); return; } spin_unlock_irqrestore(&ndp->lock, flags); if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) { if (nr->cmd) { /* Find the package */ cmd = (struct ncsi_cmd_pkt *) skb_network_header(nr->cmd); ncsi_find_package_and_channel(ndp, cmd->cmd.common.channel, &np, &nc); ncsi_send_netlink_timeout(nr, np, nc); } } /* Release the request */ ncsi_free_request(nr); } static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp) { struct ncsi_dev *nd = &ndp->ndev; struct ncsi_package *np; struct ncsi_channel *nc, *tmp; struct ncsi_cmd_arg nca; unsigned long flags; int ret; np = ndp->active_package; nc = ndp->active_channel; nca.ndp = ndp; nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; switch (nd->state) { case ncsi_dev_state_suspend: nd->state = ncsi_dev_state_suspend_select; fallthrough; case ncsi_dev_state_suspend_select: ndp->pending_req_num = 1; nca.type = NCSI_PKT_CMD_SP; nca.package = np->id; nca.channel = NCSI_RESERVED_CHANNEL; if (ndp->flags & NCSI_DEV_HWA) nca.bytes[0] = 0; else nca.bytes[0] = 1; /* To retrieve the last link states of channels in current * package when current active channel needs fail over to * another one. It means we will possibly select another * channel as next active one. The link states of channels * are most important factor of the selection. So we need * accurate link states. Unfortunately, the link states on * inactive channels can't be updated with LSC AEN in time. */ if (ndp->flags & NCSI_DEV_RESHUFFLE) nd->state = ncsi_dev_state_suspend_gls; else nd->state = ncsi_dev_state_suspend_dcnt; ret = ncsi_xmit_cmd(&nca); if (ret) goto error; break; case ncsi_dev_state_suspend_gls: ndp->pending_req_num = np->channel_num; nca.type = NCSI_PKT_CMD_GLS; nca.package = np->id; nd->state = ncsi_dev_state_suspend_dcnt; NCSI_FOR_EACH_CHANNEL(np, nc) { nca.channel = nc->id; ret = ncsi_xmit_cmd(&nca); if (ret) goto error; } break; case ncsi_dev_state_suspend_dcnt: ndp->pending_req_num = 1; nca.type = NCSI_PKT_CMD_DCNT; nca.package = np->id; nca.channel = nc->id; nd->state = ncsi_dev_state_suspend_dc; ret = ncsi_xmit_cmd(&nca); if (ret) goto error; break; case ncsi_dev_state_suspend_dc: ndp->pending_req_num = 1; nca.type = NCSI_PKT_CMD_DC; nca.package = np->id; nca.channel = nc->id; nca.bytes[0] = 1; nd->state = ncsi_dev_state_suspend_deselect; ret = ncsi_xmit_cmd(&nca); if (ret) goto error; NCSI_FOR_EACH_CHANNEL(np, tmp) { /* If there is another channel active on this package * do not deselect the package. */ if (tmp != nc && tmp->state == NCSI_CHANNEL_ACTIVE) { nd->state = ncsi_dev_state_suspend_done; break; } } break; case ncsi_dev_state_suspend_deselect: ndp->pending_req_num = 1; nca.type = NCSI_PKT_CMD_DP; nca.package = np->id; nca.channel = NCSI_RESERVED_CHANNEL; nd->state = ncsi_dev_state_suspend_done; ret = ncsi_xmit_cmd(&nca); if (ret) goto error; break; case ncsi_dev_state_suspend_done: spin_lock_irqsave(&nc->lock, flags); nc->state = NCSI_CHANNEL_INACTIVE; spin_unlock_irqrestore(&nc->lock, flags); if (ndp->flags & NCSI_DEV_RESET) ncsi_reset_dev(nd); else ncsi_process_next_channel(ndp); break; default: netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n", nd->state); } return; error: nd->state = ncsi_dev_state_functional; } /* Check the VLAN filter bitmap for a set filter, and construct a * "Set VLAN Filter - Disable" packet if found. */ static int clear_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc, struct ncsi_cmd_arg *nca) { struct ncsi_channel_vlan_filter *ncf; unsigned long flags; void *bitmap; int index; u16 vid; ncf = &nc->vlan_filter; bitmap = &ncf->bitmap; spin_lock_irqsave(&nc->lock, flags); index = find_first_bit(bitmap, ncf->n_vids); if (index >= ncf->n_vids) { spin_unlock_irqrestore(&nc->lock, flags); return -1; } vid = ncf->vids[index]; clear_bit(index, bitmap); ncf->vids[index] = 0; spin_unlock_irqrestore(&nc->lock, flags); nca->type = NCSI_PKT_CMD_SVF; nca->words[1] = vid; /* HW filter index starts at 1 */ nca->bytes[6] = index + 1; nca->bytes[7] = 0x00; return 0; } /* Find an outstanding VLAN tag and construct a "Set VLAN Filter - Enable" * packet. */ static int set_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc, struct ncsi_cmd_arg *nca) { struct ncsi_channel_vlan_filter *ncf; struct vlan_vid *vlan = NULL; unsigned long flags; int i, index; void *bitmap; u16 vid; if (list_empty(&ndp->vlan_vids)) return -1; ncf = &nc->vlan_filter; bitmap = &ncf->bitmap; spin_lock_irqsave(&nc->lock, flags); rcu_read_lock(); list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) { vid = vlan->vid; for (i = 0; i < ncf->n_vids; i++) if (ncf->vids[i] == vid) { vid = 0; break; } if (vid) break; } rcu_read_unlock(); if (!vid) { /* No VLAN ID is not set */ spin_unlock_irqrestore(&nc->lock, flags); return -1; } index = find_first_zero_bit(bitmap, ncf->n_vids); if (index < 0 || index >= ncf->n_vids) { netdev_err(ndp->ndev.dev, "Channel %u already has all VLAN filters set\n", nc->id); spin_unlock_irqrestore(&nc->lock, flags); return -1; } ncf->vids[index] = vid; set_bit(index, bitmap); spin_unlock_irqrestore(&nc->lock, flags); nca->type = NCSI_PKT_CMD_SVF; nca->words[1] = vid; /* HW filter index starts at 1 */ nca->bytes[6] = index + 1; nca->bytes[7] = 0x01; return 0; } static int ncsi_oem_keep_phy_intel(struct ncsi_cmd_arg *nca) { unsigned char data[NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN]; int ret = 0; nca->payload = NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN; memset(data, 0, NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN); *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID); data[4] = NCSI_OEM_INTEL_CMD_KEEP_PHY; /* PHY Link up attribute */ data[6] = 0x1; nca->data = data; ret = ncsi_xmit_cmd(nca); if (ret) netdev_err(nca->ndp->ndev.dev, "NCSI: Failed to transmit cmd 0x%x during configure\n", nca->type); return ret; } /* NCSI OEM Command APIs */ static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca) { unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN]; int ret = 0; nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN; memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN); *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_BCM_ID); data[5] = NCSI_OEM_BCM_CMD_GMA; nca->data = data; ret = ncsi_xmit_cmd(nca); if (ret) netdev_err(nca->ndp->ndev.dev, "NCSI: Failed to transmit cmd 0x%x during configure\n", nca->type); return ret; } static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca) { union { u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN]; u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)]; } u; int ret = 0; nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN; memset(&u, 0, sizeof(u)); u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID); u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA; u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM; nca->data = u.data_u8; ret = ncsi_xmit_cmd(nca); if (ret) netdev_err(nca->ndp->ndev.dev, "NCSI: Failed to transmit cmd 0x%x during configure\n", nca->type); return ret; } static int ncsi_oem_smaf_mlx(struct ncsi_cmd_arg *nca) { union { u8 data_u8[NCSI_OEM_MLX_CMD_SMAF_LEN]; u32 data_u32[NCSI_OEM_MLX_CMD_SMAF_LEN / sizeof(u32)]; } u; int ret = 0; memset(&u, 0, sizeof(u)); u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID); u.data_u8[5] = NCSI_OEM_MLX_CMD_SMAF; u.data_u8[6] = NCSI_OEM_MLX_CMD_SMAF_PARAM; memcpy(&u.data_u8[MLX_SMAF_MAC_ADDR_OFFSET], nca->ndp->ndev.dev->dev_addr, ETH_ALEN); u.data_u8[MLX_SMAF_MED_SUPPORT_OFFSET] = (MLX_MC_RBT_AVL | MLX_MC_RBT_SUPPORT); nca->payload = NCSI_OEM_MLX_CMD_SMAF_LEN; nca->data = u.data_u8; ret = ncsi_xmit_cmd(nca); if (ret) netdev_err(nca->ndp->ndev.dev, "NCSI: Failed to transmit cmd 0x%x during probe\n", nca->type); return ret; } static int ncsi_oem_gma_handler_intel(struct ncsi_cmd_arg *nca) { unsigned char data[NCSI_OEM_INTEL_CMD_GMA_LEN]; int ret = 0; nca->payload = NCSI_OEM_INTEL_CMD_GMA_LEN; memset(data, 0, NCSI_OEM_INTEL_CMD_GMA_LEN); *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID); data[4] = NCSI_OEM_INTEL_CMD_GMA; nca->data = data; ret = ncsi_xmit_cmd(nca); if (ret) netdev_err(nca->ndp->ndev.dev, "NCSI: Failed to transmit cmd 0x%x during configure\n", nca->type); return ret; } /* OEM Command handlers initialization */ static struct ncsi_oem_gma_handler { unsigned int mfr_id; int (*handler)(struct ncsi_cmd_arg *nca); } ncsi_oem_gma_handlers[] = { { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm }, { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx }, { NCSI_OEM_MFR_INTEL_ID, ncsi_oem_gma_handler_intel } }; static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id) { struct ncsi_oem_gma_handler *nch = NULL; int i; /* This function should only be called once, return if flag set */ if (nca->ndp->gma_flag == 1) return -1; /* Find gma handler for given manufacturer id */ for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) { if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) { if (ncsi_oem_gma_handlers[i].handler) nch = &ncsi_oem_gma_handlers[i]; break; } } if (!nch) { netdev_err(nca->ndp->ndev.dev, "NCSI: No GMA handler available for MFR-ID (0x%x)\n", mf_id); return -1; } /* Get Mac address from NCSI device */ return nch->handler(nca); } /* Determine if a given channel from the channel_queue should be used for Tx */ static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc) { struct ncsi_channel_mode *ncm; struct ncsi_channel *channel; struct ncsi_package *np; /* Check if any other channel has Tx enabled; a channel may have already * been configured and removed from the channel queue. */ NCSI_FOR_EACH_PACKAGE(ndp, np) { if (!ndp->multi_package && np != nc->package) continue; NCSI_FOR_EACH_CHANNEL(np, channel) { ncm = &channel->modes[NCSI_MODE_TX_ENABLE]; if (ncm->enable) return false; } } /* This channel is the preferred channel and has link */ list_for_each_entry_rcu(channel, &ndp->channel_queue, link) { np = channel->package; if (np->preferred_channel && ncsi_channel_has_link(np->preferred_channel)) { return np->preferred_channel == nc; } } /* This channel has link */ if (ncsi_channel_has_link(nc)) return true; list_for_each_entry_rcu(channel, &ndp->channel_queue, link) if (ncsi_channel_has_link(channel)) return false; /* No other channel has link; default to this one */ return true; } /* Change the active Tx channel in a multi-channel setup */ int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp, struct ncsi_package *package, struct ncsi_channel *disable, struct ncsi_channel *enable) { struct ncsi_cmd_arg nca; struct ncsi_channel *nc; struct ncsi_package *np; int ret = 0; if (!package->multi_channel && !ndp->multi_package) netdev_warn(ndp->ndev.dev, "NCSI: Trying to update Tx channel in single-channel mode\n"); nca.ndp = ndp; nca.req_flags = 0; /* Find current channel with Tx enabled */ NCSI_FOR_EACH_PACKAGE(ndp, np) { if (disable) break; if (!ndp->multi_package && np != package) continue; NCSI_FOR_EACH_CHANNEL(np, nc) if (nc->modes[NCSI_MODE_TX_ENABLE].enable) { disable = nc; break; } } /* Find a suitable channel for Tx */ NCSI_FOR_EACH_PACKAGE(ndp, np) { if (enable) break; if (!ndp->multi_package && np != package) continue; if (!(ndp->package_whitelist & (0x1 << np->id))) continue; if (np->preferred_channel && ncsi_channel_has_link(np->preferred_channel)) { enable = np->preferred_channel; break; } NCSI_FOR_EACH_CHANNEL(np, nc) { if (!(np->channel_whitelist & 0x1 << nc->id)) continue; if (nc->state != NCSI_CHANNEL_ACTIVE) continue; if (ncsi_channel_has_link(nc)) { enable = nc; break; } } } if (disable == enable) return -1; if (!enable) return -1; if (disable) { nca.channel = disable->id; nca.package = disable->package->id; nca.type = NCSI_PKT_CMD_DCNT; ret = ncsi_xmit_cmd(&nca); if (ret) netdev_err(ndp->ndev.dev, "Error %d sending DCNT\n", ret); } netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id); nca.channel = enable->id; nca.package = enable->package->id; nca.type = NCSI_PKT_CMD_ECNT; ret = ncsi_xmit_cmd(&nca); if (ret) netdev_err(ndp->ndev.dev, "Error %d sending ECNT\n", ret); return ret; } static void ncsi_configure_channel(struct ncsi_dev_priv *ndp) { struct ncsi_package *np = ndp->active_package; struct ncsi_channel *nc = ndp->active_channel; struct ncsi_channel *hot_nc = NULL; struct ncsi_dev *nd = &ndp->ndev; struct net_device *dev = nd->dev; struct ncsi_cmd_arg nca; unsigned char index; unsigned long flags; int ret; nca.ndp = ndp; nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; switch (nd->state) { case ncsi_dev_state_config: case ncsi_dev_state_config_sp: ndp->pending_req_num = 1; /* Select the specific package */ nca.type = NCSI_PKT_CMD_SP; if (ndp->flags & NCSI_DEV_HWA) nca.bytes[0] = 0; else nca.bytes[0] = 1; nca.package = np->id; nca.channel = NCSI_RESERVED_CHANNEL; ret = ncsi_xmit_cmd(&nca); if (ret) { netdev_err(ndp->ndev.dev, "NCSI: Failed to transmit CMD_SP\n"); goto error; } nd->state = ncsi_dev_state_config_cis; break; case ncsi_dev_state_config_cis: ndp->pending_req_num = 1; /* Clear initial state */ nca.type = NCSI_PKT_CMD_CIS; nca.package = np->id; nca.channel = nc->id; ret = ncsi_xmit_cmd(&nca); if (ret) { netdev_err(ndp->ndev.dev, "NCSI: Failed to transmit CMD_CIS\n"); goto error; } nd->state = IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) ? ncsi_dev_state_config_oem_gma : ncsi_dev_state_config_clear_vids; break; case ncsi_dev_state_config_oem_gma: nd->state = ncsi_dev_state_config_clear_vids; nca.package = np->id; nca.channel = nc->id; ndp->pending_req_num = 1; if (nc->version.major >= 1 && nc->version.minor >= 2) { nca.type = NCSI_PKT_CMD_GMCMA; ret = ncsi_xmit_cmd(&nca); } else { nca.type = NCSI_PKT_CMD_OEM; ret = ncsi_gma_handler(&nca, nc->version.mf_id); } if (ret < 0) schedule_work(&ndp->work); break; case ncsi_dev_state_config_clear_vids: case ncsi_dev_state_config_svf: case ncsi_dev_state_config_ev: case ncsi_dev_state_config_sma: case ncsi_dev_state_config_ebf: case ncsi_dev_state_config_dgmf: case ncsi_dev_state_config_ecnt: case ncsi_dev_state_config_ec: case ncsi_dev_state_config_ae: case ncsi_dev_state_config_gls: ndp->pending_req_num = 1; nca.package = np->id; nca.channel = nc->id; /* Clear any active filters on the channel before setting */ if (nd->state == ncsi_dev_state_config_clear_vids) { ret = clear_one_vid(ndp, nc, &nca); if (ret) { nd->state = ncsi_dev_state_config_svf; schedule_work(&ndp->work); break; } /* Repeat */ nd->state = ncsi_dev_state_config_clear_vids; /* Add known VLAN tags to the filter */ } else if (nd->state == ncsi_dev_state_config_svf) { ret = set_one_vid(ndp, nc, &nca); if (ret) { nd->state = ncsi_dev_state_config_ev; schedule_work(&ndp->work); break; } /* Repeat */ nd->state = ncsi_dev_state_config_svf; /* Enable/Disable the VLAN filter */ } else if (nd->state == ncsi_dev_state_config_ev) { if (list_empty(&ndp->vlan_vids)) { nca.type = NCSI_PKT_CMD_DV; } else { nca.type = NCSI_PKT_CMD_EV; nca.bytes[3] = NCSI_CAP_VLAN_NO; } nd->state = ncsi_dev_state_config_sma; } else if (nd->state == ncsi_dev_state_config_sma) { /* Use first entry in unicast filter table. Note that * the MAC filter table starts from entry 1 instead of * 0. */ nca.type = NCSI_PKT_CMD_SMA; for (index = 0; index < 6; index++) nca.bytes[index] = dev->dev_addr[index]; nca.bytes[6] = 0x1; nca.bytes[7] = 0x1; nd->state = ncsi_dev_state_config_ebf; } else if (nd->state == ncsi_dev_state_config_ebf) { nca.type = NCSI_PKT_CMD_EBF; nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap; /* if multicast global filtering is supported then * disable it so that all multicast packet will be * forwarded to management controller */ if (nc->caps[NCSI_CAP_GENERIC].cap & NCSI_CAP_GENERIC_MC) nd->state = ncsi_dev_state_config_dgmf; else if (ncsi_channel_is_tx(ndp, nc)) nd->state = ncsi_dev_state_config_ecnt; else nd->state = ncsi_dev_state_config_ec; } else if (nd->state == ncsi_dev_state_config_dgmf) { nca.type = NCSI_PKT_CMD_DGMF; if (ncsi_channel_is_tx(ndp, nc)) nd->state = ncsi_dev_state_config_ecnt; else nd->state = ncsi_dev_state_config_ec; } else if (nd->state == ncsi_dev_state_config_ecnt) { if (np->preferred_channel && nc != np->preferred_channel) netdev_info(ndp->ndev.dev, "NCSI: Tx failed over to channel %u\n", nc->id); nca.type = NCSI_PKT_CMD_ECNT; nd->state = ncsi_dev_state_config_ec; } else if (nd->state == ncsi_dev_state_config_ec) { /* Enable AEN if it's supported */ nca.type = NCSI_PKT_CMD_EC; nd->state = ncsi_dev_state_config_ae; if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK)) nd->state = ncsi_dev_state_config_gls; } else if (nd->state == ncsi_dev_state_config_ae) { nca.type = NCSI_PKT_CMD_AE; nca.bytes[0] = 0; nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap; nd->state = ncsi_dev_state_config_gls; } else if (nd->state == ncsi_dev_state_config_gls) { nca.type = NCSI_PKT_CMD_GLS; nd->state = ncsi_dev_state_config_done; } ret = ncsi_xmit_cmd(&nca); if (ret) { netdev_err(ndp->ndev.dev, "NCSI: Failed to transmit CMD %x\n", nca.type); goto error; } break; case ncsi_dev_state_config_done: netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n", nc->id); spin_lock_irqsave(&nc->lock, flags); nc->state = NCSI_CHANNEL_ACTIVE; if (ndp->flags & NCSI_DEV_RESET) { /* A reset event happened during config, start it now */ nc->reconfigure_needed = false; spin_unlock_irqrestore(&nc->lock, flags); ncsi_reset_dev(nd); break; } if (nc->reconfigure_needed) { /* This channel's configuration has been updated * part-way during the config state - start the * channel configuration over */ nc->reconfigure_needed = false; nc->state = NCSI_CHANNEL_INACTIVE; spin_unlock_irqrestore(&nc->lock, flags); spin_lock_irqsave(&ndp->lock, flags); list_add_tail_rcu(&nc->link, &ndp->channel_queue); spin_unlock_irqrestore(&ndp->lock, flags); netdev_dbg(dev, "Dirty NCSI channel state reset\n"); ncsi_process_next_channel(ndp); break; } if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) { hot_nc = nc; } else { hot_nc = NULL; netdev_dbg(ndp->ndev.dev, "NCSI: channel %u link down after config\n", nc->id); } spin_unlock_irqrestore(&nc->lock, flags); /* Update the hot channel */ spin_lock_irqsave(&ndp->lock, flags); ndp->hot_channel = hot_nc; spin_unlock_irqrestore(&ndp->lock, flags); ncsi_start_channel_monitor(nc); ncsi_process_next_channel(ndp); break; default: netdev_alert(dev, "Wrong NCSI state 0x%x in config\n", nd->state); } return; error: ncsi_report_link(ndp, true); } static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp) { struct ncsi_channel *nc, *found, *hot_nc; struct ncsi_channel_mode *ncm; unsigned long flags, cflags; struct ncsi_package *np; bool with_link; spin_lock_irqsave(&ndp->lock, flags); hot_nc = ndp->hot_channel; spin_unlock_irqrestore(&ndp->lock, flags); /* By default the search is done once an inactive channel with up * link is found, unless a preferred channel is set. * If multi_package or multi_channel are configured all channels in the * whitelist are added to the channel queue. */ found = NULL; with_link = false; NCSI_FOR_EACH_PACKAGE(ndp, np) { if (!(ndp->package_whitelist & (0x1 << np->id))) continue; NCSI_FOR_EACH_CHANNEL(np, nc) { if (!(np->channel_whitelist & (0x1 << nc->id))) continue; spin_lock_irqsave(&nc->lock, cflags); if (!list_empty(&nc->link) || nc->state != NCSI_CHANNEL_INACTIVE) { spin_unlock_irqrestore(&nc->lock, cflags); continue; } if (!found) found = nc; if (nc == hot_nc) found = nc; ncm = &nc->modes[NCSI_MODE_LINK]; if (ncm->data[2] & 0x1) { found = nc; with_link = true; } /* If multi_channel is enabled configure all valid * channels whether or not they currently have link * so they will have AENs enabled. */ if (with_link || np->multi_channel) { spin_lock_irqsave(&ndp->lock, flags); list_add_tail_rcu(&nc->link, &ndp->channel_queue); spin_unlock_irqrestore(&ndp->lock, flags); netdev_dbg(ndp->ndev.dev, "NCSI: Channel %u added to queue (link %s)\n", nc->id, ncm->data[2] & 0x1 ? "up" : "down"); } spin_unlock_irqrestore(&nc->lock, cflags); if (with_link && !np->multi_channel) break; } if (with_link && !ndp->multi_package) break; } if (list_empty(&ndp->channel_queue) && found) { netdev_info(ndp->ndev.dev, "NCSI: No channel with link found, configuring channel %u\n", found->id); spin_lock_irqsave(&ndp->lock, flags); list_add_tail_rcu(&found->link, &ndp->channel_queue); spin_unlock_irqrestore(&ndp->lock, flags); } else if (!found) { netdev_warn(ndp->ndev.dev, "NCSI: No channel found to configure!\n"); ncsi_report_link(ndp, true); return -ENODEV; } return ncsi_process_next_channel(ndp); } static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp) { struct ncsi_package *np; struct ncsi_channel *nc; unsigned int cap; bool has_channel = false; /* The hardware arbitration is disabled if any one channel * doesn't support explicitly. */ NCSI_FOR_EACH_PACKAGE(ndp, np) { NCSI_FOR_EACH_CHANNEL(np, nc) { has_channel = true; cap = nc->caps[NCSI_CAP_GENERIC].cap; if (!(cap & NCSI_CAP_GENERIC_HWA) || (cap & NCSI_CAP_GENERIC_HWA_MASK) != NCSI_CAP_GENERIC_HWA_SUPPORT) { ndp->flags &= ~NCSI_DEV_HWA; return false; } } } if (has_channel) { ndp->flags |= NCSI_DEV_HWA; return true; } ndp->flags &= ~NCSI_DEV_HWA; return false; } static void ncsi_probe_channel(struct ncsi_dev_priv *ndp) { struct ncsi_dev *nd = &ndp->ndev; struct ncsi_package *np; struct ncsi_channel *nc; struct ncsi_cmd_arg nca; unsigned char index; int ret; nca.ndp = ndp; nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; switch (nd->state) { case ncsi_dev_state_probe: nd->state = ncsi_dev_state_probe_deselect; fallthrough; case ncsi_dev_state_probe_deselect: ndp->pending_req_num = 8; /* Deselect all possible packages */ nca.type = NCSI_PKT_CMD_DP; nca.channel = NCSI_RESERVED_CHANNEL; for (index = 0; index < 8; index++) { nca.package = index; ret = ncsi_xmit_cmd(&nca); if (ret) goto error; } nd->state = ncsi_dev_state_probe_package; break; case ncsi_dev_state_probe_package: ndp->pending_req_num = 1; nca.type = NCSI_PKT_CMD_SP; nca.bytes[0] = 1; nca.package = ndp->package_probe_id; nca.channel = NCSI_RESERVED_CHANNEL; ret = ncsi_xmit_cmd(&nca); if (ret) goto error; nd->state = ncsi_dev_state_probe_channel; break; case ncsi_dev_state_probe_channel: ndp->active_package = ncsi_find_package(ndp, ndp->package_probe_id); if (!ndp->active_package) { /* No response */ nd->state = ncsi_dev_state_probe_dp; schedule_work(&ndp->work); break; } nd->state = ncsi_dev_state_probe_cis; if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) && ndp->mlx_multi_host) nd->state = ncsi_dev_state_probe_mlx_gma; schedule_work(&ndp->work); break; case ncsi_dev_state_probe_mlx_gma: ndp->pending_req_num = 1; nca.type = NCSI_PKT_CMD_OEM; nca.package = ndp->active_package->id; nca.channel = 0; ret = ncsi_oem_gma_handler_mlx(&nca); if (ret) goto error; nd->state = ncsi_dev_state_probe_mlx_smaf; break; case ncsi_dev_state_probe_mlx_smaf: ndp->pending_req_num = 1; nca.type = NCSI_PKT_CMD_OEM; nca.package = ndp->active_package->id; nca.channel = 0; ret = ncsi_oem_smaf_mlx(&nca); if (ret) goto error; nd->state = ncsi_dev_state_probe_cis; break; case ncsi_dev_state_probe_cis: ndp->pending_req_num = NCSI_RESERVED_CHANNEL; /* Clear initial state */ nca.type = NCSI_PKT_CMD_CIS; nca.package = ndp->active_package->id; for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) { nca.channel = index; ret = ncsi_xmit_cmd(&nca); if (ret) goto error; } nd->state = ncsi_dev_state_probe_gvi; if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY)) nd->state = ncsi_dev_state_probe_keep_phy; break; case ncsi_dev_state_probe_keep_phy: ndp->pending_req_num = 1; nca.type = NCSI_PKT_CMD_OEM; nca.package = ndp->active_package->id; nca.channel = 0; ret = ncsi_oem_keep_phy_intel(&nca); if (ret) goto error; nd->state = ncsi_dev_state_probe_gvi; break; case ncsi_dev_state_probe_gvi: case ncsi_dev_state_probe_gc: case ncsi_dev_state_probe_gls: np = ndp->active_package; ndp->pending_req_num = np->channel_num; /* Retrieve version, capability or link status */ if (nd->state == ncsi_dev_state_probe_gvi) nca.type = NCSI_PKT_CMD_GVI; else if (nd->state == ncsi_dev_state_probe_gc) nca.type = NCSI_PKT_CMD_GC; else nca.type = NCSI_PKT_CMD_GLS; nca.package = np->id; NCSI_FOR_EACH_CHANNEL(np, nc) { nca.channel = nc->id; ret = ncsi_xmit_cmd(&nca); if (ret) goto error; } if (nd->state == ncsi_dev_state_probe_gvi) nd->state = ncsi_dev_state_probe_gc; else if (nd->state == ncsi_dev_state_probe_gc) nd->state = ncsi_dev_state_probe_gls; else nd->state = ncsi_dev_state_probe_dp; break; case ncsi_dev_state_probe_dp: ndp->pending_req_num = 1; /* Deselect the current package */ nca.type = NCSI_PKT_CMD_DP; nca.package = ndp->package_probe_id; nca.channel = NCSI_RESERVED_CHANNEL; ret = ncsi_xmit_cmd(&nca); if (ret) goto error; /* Probe next package */ ndp->package_probe_id++; if (ndp->package_probe_id >= 8) { /* Probe finished */ ndp->flags |= NCSI_DEV_PROBED; break; } nd->state = ncsi_dev_state_probe_package; ndp->active_package = NULL; break; default: netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n", nd->state); } if (ndp->flags & NCSI_DEV_PROBED) { /* Check if all packages have HWA support */ ncsi_check_hwa(ndp); ncsi_choose_active_channel(ndp); } return; error: netdev_err(ndp->ndev.dev, "NCSI: Failed to transmit cmd 0x%x during probe\n", nca.type); ncsi_report_link(ndp, true); } static void ncsi_dev_work(struct work_struct *work) { struct ncsi_dev_priv *ndp = container_of(work, struct ncsi_dev_priv, work); struct ncsi_dev *nd = &ndp->ndev; switch (nd->state & ncsi_dev_state_major) { case ncsi_dev_state_probe: ncsi_probe_channel(ndp); break; case ncsi_dev_state_suspend: ncsi_suspend_channel(ndp); break; case ncsi_dev_state_config: ncsi_configure_channel(ndp); break; default: netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n", nd->state); } } int ncsi_process_next_channel(struct ncsi_dev_priv *ndp) { struct ncsi_channel *nc; int old_state; unsigned long flags; spin_lock_irqsave(&ndp->lock, flags); nc = list_first_or_null_rcu(&ndp->channel_queue, struct ncsi_channel, link); if (!nc) { spin_unlock_irqrestore(&ndp->lock, flags); goto out; } list_del_init(&nc->link); spin_unlock_irqrestore(&ndp->lock, flags); spin_lock_irqsave(&nc->lock, flags); old_state = nc->state; nc->state = NCSI_CHANNEL_INVISIBLE; spin_unlock_irqrestore(&nc->lock, flags); ndp->active_channel = nc; ndp->active_package = nc->package; switch (old_state) { case NCSI_CHANNEL_INACTIVE: ndp->ndev.state = ncsi_dev_state_config; netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n", nc->id); ncsi_configure_channel(ndp); break; case NCSI_CHANNEL_ACTIVE: ndp->ndev.state = ncsi_dev_state_suspend; netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n", nc->id); ncsi_suspend_channel(ndp); break; default: netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n", old_state, nc->package->id, nc->id); ncsi_report_link(ndp, false); return -EINVAL; } return 0; out: ndp->active_channel = NULL; ndp->active_package = NULL; if (ndp->flags & NCSI_DEV_RESHUFFLE) { ndp->flags &= ~NCSI_DEV_RESHUFFLE; return ncsi_choose_active_channel(ndp); } ncsi_report_link(ndp, false); return -ENODEV; } static int ncsi_kick_channels(struct ncsi_dev_priv *ndp) { struct ncsi_dev *nd = &ndp->ndev; struct ncsi_channel *nc; struct ncsi_package *np; unsigned long flags; unsigned int n = 0; NCSI_FOR_EACH_PACKAGE(ndp, np) { NCSI_FOR_EACH_CHANNEL(np, nc) { spin_lock_irqsave(&nc->lock, flags); /* Channels may be busy, mark dirty instead of * kicking if; * a) not ACTIVE (configured) * b) in the channel_queue (to be configured) * c) it's ndev is in the config state */ if (nc->state != NCSI_CHANNEL_ACTIVE) { if ((ndp->ndev.state & 0xff00) == ncsi_dev_state_config || !list_empty(&nc->link)) { netdev_dbg(nd->dev, "NCSI: channel %p marked dirty\n", nc); nc->reconfigure_needed = true; } spin_unlock_irqrestore(&nc->lock, flags); continue; } spin_unlock_irqrestore(&nc->lock, flags); ncsi_stop_channel_monitor(nc); spin_lock_irqsave(&nc->lock, flags); nc->state = NCSI_CHANNEL_INACTIVE; spin_unlock_irqrestore(&nc->lock, flags); spin_lock_irqsave(&ndp->lock, flags); list_add_tail_rcu(&nc->link, &ndp->channel_queue); spin_unlock_irqrestore(&ndp->lock, flags); netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc); n++; } } return n; } int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) { struct ncsi_dev_priv *ndp; unsigned int n_vids = 0; struct vlan_vid *vlan; struct ncsi_dev *nd; bool found = false; if (vid == 0) return 0; nd = ncsi_find_dev(dev); if (!nd) { netdev_warn(dev, "NCSI: No net_device?\n"); return 0; } ndp = TO_NCSI_DEV_PRIV(nd); /* Add the VLAN id to our internal list */ list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) { n_vids++; if (vlan->vid == vid) { netdev_dbg(dev, "NCSI: vid %u already registered\n", vid); return 0; } } if (n_vids >= NCSI_MAX_VLAN_VIDS) { netdev_warn(dev, "tried to add vlan id %u but NCSI max already registered (%u)\n", vid, NCSI_MAX_VLAN_VIDS); return -ENOSPC; } vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); if (!vlan) return -ENOMEM; vlan->proto = proto; vlan->vid = vid; list_add_rcu(&vlan->list, &ndp->vlan_vids); netdev_dbg(dev, "NCSI: Added new vid %u\n", vid); found = ncsi_kick_channels(ndp) != 0; return found ? ncsi_process_next_channel(ndp) : 0; } EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid); int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) { struct vlan_vid *vlan, *tmp; struct ncsi_dev_priv *ndp; struct ncsi_dev *nd; bool found = false; if (vid == 0) return 0; nd = ncsi_find_dev(dev); if (!nd) { netdev_warn(dev, "NCSI: no net_device?\n"); return 0; } ndp = TO_NCSI_DEV_PRIV(nd); /* Remove the VLAN id from our internal list */ list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list) if (vlan->vid == vid) { netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid); list_del_rcu(&vlan->list); found = true; kfree(vlan); } if (!found) { netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid); return -EINVAL; } found = ncsi_kick_channels(ndp) != 0; return found ? ncsi_process_next_channel(ndp) : 0; } EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid); struct ncsi_dev *ncsi_register_dev(struct net_device *dev, void (*handler)(struct ncsi_dev *ndev)) { struct ncsi_dev_priv *ndp; struct ncsi_dev *nd; struct platform_device *pdev; struct device_node *np; unsigned long flags; int i; /* Check if the device has been registered or not */ nd = ncsi_find_dev(dev); if (nd) return nd; /* Create NCSI device */ ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC); if (!ndp) return NULL; nd = &ndp->ndev; nd->state = ncsi_dev_state_registered; nd->dev = dev; nd->handler = handler; ndp->pending_req_num = 0; INIT_LIST_HEAD(&ndp->channel_queue); INIT_LIST_HEAD(&ndp->vlan_vids); INIT_WORK(&ndp->work, ncsi_dev_work); ndp->package_whitelist = UINT_MAX; /* Initialize private NCSI device */ spin_lock_init(&ndp->lock); INIT_LIST_HEAD(&ndp->packages); ndp->request_id = NCSI_REQ_START_IDX; for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) { ndp->requests[i].id = i; ndp->requests[i].ndp = ndp; timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0); } spin_lock_irqsave(&ncsi_dev_lock, flags); list_add_tail_rcu(&ndp->node, &ncsi_dev_list); spin_unlock_irqrestore(&ncsi_dev_lock, flags); /* Register NCSI packet Rx handler */ ndp->ptype.type = cpu_to_be16(ETH_P_NCSI); ndp->ptype.func = ncsi_rcv_rsp; ndp->ptype.dev = dev; dev_add_pack(&ndp->ptype); pdev = to_platform_device(dev->dev.parent); if (pdev) { np = pdev->dev.of_node; if (np && (of_property_read_bool(np, "mellanox,multi-host") || of_property_read_bool(np, "mlx,multi-host"))) ndp->mlx_multi_host = true; } return nd; } EXPORT_SYMBOL_GPL(ncsi_register_dev); int ncsi_start_dev(struct ncsi_dev *nd) { struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); if (nd->state != ncsi_dev_state_registered && nd->state != ncsi_dev_state_functional) return -ENOTTY; if (!(ndp->flags & NCSI_DEV_PROBED)) { ndp->package_probe_id = 0; nd->state = ncsi_dev_state_probe; schedule_work(&ndp->work); return 0; } return ncsi_reset_dev(nd); } EXPORT_SYMBOL_GPL(ncsi_start_dev); void ncsi_stop_dev(struct ncsi_dev *nd) { struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); struct ncsi_package *np; struct ncsi_channel *nc; bool chained; int old_state; unsigned long flags; /* Stop the channel monitor on any active channels. Don't reset the * channel state so we know which were active when ncsi_start_dev() * is next called. */ NCSI_FOR_EACH_PACKAGE(ndp, np) { NCSI_FOR_EACH_CHANNEL(np, nc) { ncsi_stop_channel_monitor(nc); spin_lock_irqsave(&nc->lock, flags); chained = !list_empty(&nc->link); old_state = nc->state; spin_unlock_irqrestore(&nc->lock, flags); WARN_ON_ONCE(chained || old_state == NCSI_CHANNEL_INVISIBLE); } } netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n"); ncsi_report_link(ndp, true); } EXPORT_SYMBOL_GPL(ncsi_stop_dev); int ncsi_reset_dev(struct ncsi_dev *nd) { struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); struct ncsi_channel *nc, *active, *tmp; struct ncsi_package *np; unsigned long flags; spin_lock_irqsave(&ndp->lock, flags); if (!(ndp->flags & NCSI_DEV_RESET)) { /* Haven't been called yet, check states */ switch (nd->state & ncsi_dev_state_major) { case ncsi_dev_state_registered: case ncsi_dev_state_probe: /* Not even probed yet - do nothing */ spin_unlock_irqrestore(&ndp->lock, flags); return 0; case ncsi_dev_state_suspend: case ncsi_dev_state_config: /* Wait for the channel to finish its suspend/config * operation; once it finishes it will check for * NCSI_DEV_RESET and reset the state. */ ndp->flags |= NCSI_DEV_RESET; spin_unlock_irqrestore(&ndp->lock, flags); return 0; } } else { switch (nd->state) { case ncsi_dev_state_suspend_done: case ncsi_dev_state_config_done: case ncsi_dev_state_functional: /* Ok */ break; default: /* Current reset operation happening */ spin_unlock_irqrestore(&ndp->lock, flags); return 0; } } if (!list_empty(&ndp->channel_queue)) { /* Clear any channel queue we may have interrupted */ list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link) list_del_init(&nc->link); } spin_unlock_irqrestore(&ndp->lock, flags); active = NULL; NCSI_FOR_EACH_PACKAGE(ndp, np) { NCSI_FOR_EACH_CHANNEL(np, nc) { spin_lock_irqsave(&nc->lock, flags); if (nc->state == NCSI_CHANNEL_ACTIVE) { active = nc; nc->state = NCSI_CHANNEL_INVISIBLE; spin_unlock_irqrestore(&nc->lock, flags); ncsi_stop_channel_monitor(nc); break; } spin_unlock_irqrestore(&nc->lock, flags); } if (active) break; } if (!active) { /* Done */ spin_lock_irqsave(&ndp->lock, flags); ndp->flags &= ~NCSI_DEV_RESET; spin_unlock_irqrestore(&ndp->lock, flags); return ncsi_choose_active_channel(ndp); } spin_lock_irqsave(&ndp->lock, flags); ndp->flags |= NCSI_DEV_RESET; ndp->active_channel = active; ndp->active_package = active->package; spin_unlock_irqrestore(&ndp->lock, flags); nd->state = ncsi_dev_state_suspend; schedule_work(&ndp->work); return 0; } void ncsi_unregister_dev(struct ncsi_dev *nd) { struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); struct ncsi_package *np, *tmp; unsigned long flags; dev_remove_pack(&ndp->ptype); list_for_each_entry_safe(np, tmp, &ndp->packages, node) ncsi_remove_package(np); spin_lock_irqsave(&ncsi_dev_lock, flags); list_del_rcu(&ndp->node); spin_unlock_irqrestore(&ncsi_dev_lock, flags); kfree(ndp); } EXPORT_SYMBOL_GPL(ncsi_unregister_dev);
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