diff options
Diffstat (limited to 'net/ncsi')
| -rw-r--r-- | net/ncsi/internal.h | 50 | ||||
| -rw-r--r-- | net/ncsi/ncsi-manage.c | 763 | ||||
| -rw-r--r-- | net/ncsi/ncsi-rsp.c | 15 |
3 files changed, 828 insertions, 0 deletions
diff --git a/net/ncsi/internal.h b/net/ncsi/internal.h index bd000c9..38fc95a 100644 --- a/net/ncsi/internal.h +++ b/net/ncsi/internal.h @@ -178,6 +178,7 @@ struct ncsi_channel { int state; #define NCSI_CHANNEL_INACTIVE 1 #define NCSI_CHANNEL_ACTIVE 2 +#define NCSI_CHANNEL_INVISIBLE 3 spinlock_t lock; /* Protect filters etc */ struct ncsi_package *package; struct ncsi_channel_version version; @@ -185,7 +186,11 @@ struct ncsi_channel { struct ncsi_channel_mode modes[NCSI_MODE_MAX]; struct ncsi_channel_filter *filters[NCSI_FILTER_MAX]; struct ncsi_channel_stats stats; + struct timer_list timer; /* Link monitor timer */ + bool enabled; /* Timer is enabled */ + unsigned int timeout; /* Times of timeout */ struct list_head node; + struct list_head link; }; struct ncsi_package { @@ -209,14 +214,56 @@ struct ncsi_request { bool enabled; /* Time has been enabled or not */ }; +enum { + ncsi_dev_state_major = 0xff00, + ncsi_dev_state_minor = 0x00ff, + ncsi_dev_state_probe_deselect = 0x0201, + ncsi_dev_state_probe_package, + ncsi_dev_state_probe_channel, + ncsi_dev_state_probe_cis, + ncsi_dev_state_probe_gvi, + ncsi_dev_state_probe_gc, + ncsi_dev_state_probe_gls, + ncsi_dev_state_probe_dp, + ncsi_dev_state_config_sp = 0x0301, + ncsi_dev_state_config_cis, + ncsi_dev_state_config_sma, + ncsi_dev_state_config_ebf, +#if IS_ENABLED(CONFIG_IPV6) + ncsi_dev_state_config_egmf, +#endif + ncsi_dev_state_config_ecnt, + ncsi_dev_state_config_ec, + ncsi_dev_state_config_ae, + ncsi_dev_state_config_gls, + ncsi_dev_state_config_done, + ncsi_dev_state_suspend_select = 0x0401, + ncsi_dev_state_suspend_dcnt, + ncsi_dev_state_suspend_dc, + ncsi_dev_state_suspend_deselect, + ncsi_dev_state_suspend_done +}; + struct ncsi_dev_priv { struct ncsi_dev ndev; /* Associated NCSI device */ unsigned int flags; /* NCSI device flags */ +#define NCSI_DEV_PROBED 1 /* Finalized NCSI topology */ +#define NCSI_DEV_HWA 2 /* Enabled HW arbitration */ +#define NCSI_DEV_RESHUFFLE 4 spinlock_t lock; /* Protect the NCSI device */ +#if IS_ENABLED(CONFIG_IPV6) + unsigned int inet6_addr_num; /* Number of IPv6 addresses */ +#endif unsigned int package_num; /* Number of packages */ struct list_head packages; /* List of packages */ struct ncsi_request requests[256]; /* Request table */ unsigned int request_id; /* Last used request ID */ + unsigned int pending_req_num; /* Number of pending requests */ + struct ncsi_package *active_package; /* Currently handled package */ + struct ncsi_channel *active_channel; /* Currently handled channel */ + struct list_head channel_queue; /* Config queue of channels */ + struct work_struct work; /* For channel management */ + struct packet_type ptype; /* NCSI packet Rx handler */ struct list_head node; /* Form NCSI device list */ }; @@ -251,6 +298,8 @@ extern spinlock_t ncsi_dev_lock; int ncsi_find_filter(struct ncsi_channel *nc, int table, void *data); int ncsi_add_filter(struct ncsi_channel *nc, int table, void *data); int ncsi_remove_filter(struct ncsi_channel *nc, int table, int index); +void ncsi_start_channel_monitor(struct ncsi_channel *nc); +void ncsi_stop_channel_monitor(struct ncsi_channel *nc); struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np, unsigned char id); struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, @@ -267,6 +316,7 @@ void ncsi_find_package_and_channel(struct ncsi_dev_priv *ndp, struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp, bool driven); void ncsi_free_request(struct ncsi_request *nr); struct ncsi_dev *ncsi_find_dev(struct net_device *dev); +int ncsi_process_next_channel(struct ncsi_dev_priv *ndp); /* Packet handlers */ u32 ncsi_calculate_checksum(unsigned char *data, int len); diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c index 0e28ed8..d627a39 100644 --- a/net/ncsi/ncsi-manage.c +++ b/net/ncsi/ncsi-manage.c @@ -17,8 +17,12 @@ #include <net/ncsi.h> #include <net/net_namespace.h> #include <net/sock.h> +#include <net/addrconf.h> +#include <net/ipv6.h> +#include <net/if_inet6.h> #include "internal.h" +#include "ncsi-pkt.h" LIST_HEAD(ncsi_dev_list); DEFINE_SPINLOCK(ncsi_dev_lock); @@ -123,6 +127,120 @@ int ncsi_remove_filter(struct ncsi_channel *nc, int table, int index) return 0; } +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; + + 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) { + if (!list_empty(&nc->link) || + nc->state != NCSI_CHANNEL_ACTIVE) + continue; + + if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) { + nd->link_up = 1; + goto report; + } + } + } + +report: + nd->handler(nd); +} + +static void ncsi_channel_monitor(unsigned long data) +{ + struct ncsi_channel *nc = (struct ncsi_channel *)data; + struct ncsi_package *np = nc->package; + struct ncsi_dev_priv *ndp = np->ndp; + struct ncsi_cmd_arg nca; + bool enabled; + unsigned int timeout; + unsigned long flags; + int ret; + + spin_lock_irqsave(&nc->lock, flags); + timeout = nc->timeout; + enabled = nc->enabled; + spin_unlock_irqrestore(&nc->lock, flags); + + if (!enabled || !list_empty(&nc->link)) + return; + if (nc->state != NCSI_CHANNEL_INACTIVE && + nc->state != NCSI_CHANNEL_ACTIVE) + return; + + if (!(timeout % 2)) { + nca.ndp = ndp; + nca.package = np->id; + nca.channel = nc->id; + nca.type = NCSI_PKT_CMD_GLS; + nca.driven = false; + ret = ncsi_xmit_cmd(&nca); + if (ret) { + netdev_err(ndp->ndev.dev, "Error %d sending GLS\n", + ret); + return; + } + } + + if (timeout + 1 >= 3) { + if (!(ndp->flags & NCSI_DEV_HWA) && + nc->state == NCSI_CHANNEL_ACTIVE) + ncsi_report_link(ndp, true); + + spin_lock_irqsave(&ndp->lock, flags); + xchg(&nc->state, NCSI_CHANNEL_INACTIVE); + 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->timeout = timeout + 1; + nc->enabled = true; + spin_unlock_irqrestore(&nc->lock, flags); + mod_timer(&nc->timer, jiffies + HZ * (1 << (nc->timeout / 2))); +} + +void ncsi_start_channel_monitor(struct ncsi_channel *nc) +{ + unsigned long flags; + + spin_lock_irqsave(&nc->lock, flags); + WARN_ON_ONCE(nc->enabled); + nc->timeout = 0; + nc->enabled = true; + spin_unlock_irqrestore(&nc->lock, flags); + + mod_timer(&nc->timer, jiffies + HZ * (1 << (nc->timeout / 2))); +} + +void ncsi_stop_channel_monitor(struct ncsi_channel *nc) +{ + unsigned long flags; + + spin_lock_irqsave(&nc->lock, flags); + if (!nc->enabled) { + spin_unlock_irqrestore(&nc->lock, flags); + return; + } + nc->enabled = false; + spin_unlock_irqrestore(&nc->lock, flags); + + del_timer_sync(&nc->timer); +} + struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np, unsigned char id) { @@ -149,7 +267,10 @@ struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, unsigned char id) nc->id = id; nc->package = np; nc->state = NCSI_CHANNEL_INACTIVE; + nc->enabled = false; + setup_timer(&nc->timer, ncsi_channel_monitor, (unsigned long)nc); 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++) @@ -190,6 +311,7 @@ static void ncsi_remove_channel(struct ncsi_channel *nc) 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); @@ -323,6 +445,7 @@ 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; @@ -335,8 +458,12 @@ void ncsi_free_request(struct ncsi_request *nr) nr->cmd = NULL; nr->rsp = NULL; nr->used = false; + driven = nr->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); @@ -375,6 +502,587 @@ static void ncsi_request_timeout(unsigned long data) ncsi_free_request(nr); } +static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp) +{ + struct ncsi_dev *nd = &ndp->ndev; + struct ncsi_package *np = ndp->active_package; + struct ncsi_channel *nc = ndp->active_channel; + struct ncsi_cmd_arg nca; + int ret; + + nca.ndp = ndp; + nca.driven = true; + switch (nd->state) { + case ncsi_dev_state_suspend: + nd->state = ncsi_dev_state_suspend_select; + /* Fall through */ + case ncsi_dev_state_suspend_select: + case ncsi_dev_state_suspend_dcnt: + case ncsi_dev_state_suspend_dc: + case ncsi_dev_state_suspend_deselect: + ndp->pending_req_num = 1; + + np = ndp->active_package; + nc = ndp->active_channel; + nca.package = np->id; + if (nd->state == ncsi_dev_state_suspend_select) { + nca.type = NCSI_PKT_CMD_SP; + nca.channel = 0x1f; + if (ndp->flags & NCSI_DEV_HWA) + nca.bytes[0] = 0; + else + nca.bytes[0] = 1; + nd->state = ncsi_dev_state_suspend_dcnt; + } else if (nd->state == ncsi_dev_state_suspend_dcnt) { + nca.type = NCSI_PKT_CMD_DCNT; + nca.channel = nc->id; + nd->state = ncsi_dev_state_suspend_dc; + } else if (nd->state == ncsi_dev_state_suspend_dc) { + nca.type = NCSI_PKT_CMD_DC; + nca.channel = nc->id; + nca.bytes[0] = 1; + nd->state = ncsi_dev_state_suspend_deselect; + } else if (nd->state == ncsi_dev_state_suspend_deselect) { + nca.type = NCSI_PKT_CMD_DP; + nca.channel = 0x1f; + nd->state = ncsi_dev_state_suspend_done; + } + + ret = ncsi_xmit_cmd(&nca); + if (ret) { + nd->state = ncsi_dev_state_functional; + return; + } + + break; + case ncsi_dev_state_suspend_done: + xchg(&nc->state, NCSI_CHANNEL_INACTIVE); + ncsi_process_next_channel(ndp); + + break; + default: + netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n", + nd->state); + } +} + +static void ncsi_configure_channel(struct ncsi_dev_priv *ndp) +{ + struct ncsi_dev *nd = &ndp->ndev; + struct net_device *dev = nd->dev; + struct ncsi_package *np = ndp->active_package; + struct ncsi_channel *nc = ndp->active_channel; + struct ncsi_cmd_arg nca; + unsigned char index; + int ret; + + nca.ndp = ndp; + nca.driven = true; + 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 = 0x1f; + ret = ncsi_xmit_cmd(&nca); + if (ret) + 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) + goto error; + + nd->state = ncsi_dev_state_config_sma; + break; + case ncsi_dev_state_config_sma: + case ncsi_dev_state_config_ebf: +#if IS_ENABLED(CONFIG_IPV6) + case ncsi_dev_state_config_egmf: +#endif + 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; + + /* Use first entry in unicast filter table. Note that + * the MAC filter table starts from entry 1 instead of + * 0. + */ + if (nd->state == ncsi_dev_state_config_sma) { + 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; + nd->state = ncsi_dev_state_config_ecnt; +#if IS_ENABLED(CONFIG_IPV6) + if (ndp->inet6_addr_num > 0 && + (nc->caps[NCSI_CAP_GENERIC].cap & + NCSI_CAP_GENERIC_MC)) + nd->state = ncsi_dev_state_config_egmf; + else + nd->state = ncsi_dev_state_config_ecnt; + } else if (nd->state == ncsi_dev_state_config_egmf) { + nca.type = NCSI_PKT_CMD_EGMF; + nca.dwords[0] = nc->caps[NCSI_CAP_MC].cap; + nd->state = ncsi_dev_state_config_ecnt; +#endif /* CONFIG_IPV6 */ + } else if (nd->state == ncsi_dev_state_config_ecnt) { + 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) + goto error; + break; + case ncsi_dev_state_config_done: + if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) + xchg(&nc->state, NCSI_CHANNEL_ACTIVE); + else + xchg(&nc->state, NCSI_CHANNEL_INACTIVE); + + ncsi_start_channel_monitor(nc); + ncsi_process_next_channel(ndp); + break; + default: + netdev_warn(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_package *np; + struct ncsi_channel *nc, *found; + struct ncsi_channel_mode *ncm; + unsigned long flags; + + /* The search is done once an inactive channel with up + * link is found. + */ + found = NULL; + NCSI_FOR_EACH_PACKAGE(ndp, np) { + NCSI_FOR_EACH_CHANNEL(np, nc) { + if (!list_empty(&nc->link) || + nc->state != NCSI_CHANNEL_INACTIVE) + continue; + + if (!found) + found = nc; + + ncm = &nc->modes[NCSI_MODE_LINK]; + if (ncm->data[2] & 0x1) { + found = nc; + goto out; + } + } + } + + if (!found) { + ncsi_report_link(ndp, true); + return -ENODEV; + } + +out: + spin_lock_irqsave(&ndp->lock, flags); + list_add_tail_rcu(&found->link, &ndp->channel_queue); + spin_unlock_irqrestore(&ndp->lock, flags); + + 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; + + /* 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) { + 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; + } + } + } + + ndp->flags |= NCSI_DEV_HWA; + return true; +} + +static int ncsi_enable_hwa(struct ncsi_dev_priv *ndp) +{ + struct ncsi_package *np; + struct ncsi_channel *nc; + unsigned long flags; + + /* Move all available channels to processing queue */ + spin_lock_irqsave(&ndp->lock, flags); + NCSI_FOR_EACH_PACKAGE(ndp, np) { + NCSI_FOR_EACH_CHANNEL(np, nc) { + WARN_ON_ONCE(nc->state != NCSI_CHANNEL_INACTIVE || + !list_empty(&nc->link)); + ncsi_stop_channel_monitor(nc); + list_add_tail_rcu(&nc->link, &ndp->channel_queue); + } + } + spin_unlock_irqrestore(&ndp->lock, flags); + + /* We can have no channels in extremely case */ + if (list_empty(&ndp->channel_queue)) { + ncsi_report_link(ndp, false); + return -ENOENT; + } + + return ncsi_process_next_channel(ndp); +} + +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.driven = true; + switch (nd->state) { + case ncsi_dev_state_probe: + nd->state = ncsi_dev_state_probe_deselect; + /* Fall through */ + case ncsi_dev_state_probe_deselect: + ndp->pending_req_num = 8; + + /* Deselect all possible packages */ + nca.type = NCSI_PKT_CMD_DP; + nca.channel = 0x1f; + 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 = 16; + + /* Select all possible packages */ + nca.type = NCSI_PKT_CMD_SP; + nca.bytes[0] = 1; + nca.channel = 0x1f; + for (index = 0; index < 8; index++) { + nca.package = index; + ret = ncsi_xmit_cmd(&nca); + if (ret) + goto error; + } + + /* Disable all possible packages */ + nca.type = NCSI_PKT_CMD_DP; + for (index = 0; index < 8; index++) { + nca.package = index; + ret = ncsi_xmit_cmd(&nca); + if (ret) + goto error; + } + + nd->state = ncsi_dev_state_probe_channel; + break; + case ncsi_dev_state_probe_channel: + if (!ndp->active_package) + ndp->active_package = list_first_or_null_rcu( + &ndp->packages, struct ncsi_package, node); + else if (list_is_last(&ndp->active_package->node, + &ndp->packages)) + ndp->active_package = NULL; + else + ndp->active_package = list_next_entry( + ndp->active_package, node); + + /* All available packages and channels are enumerated. The + * enumeration happens for once when the NCSI interface is + * started. So we need continue to start the interface after + * the enumeration. + * + * We have to choose an active channel before configuring it. + * Note that we possibly don't have active channel in extreme + * situation. + */ + if (!ndp->active_package) { + ndp->flags |= NCSI_DEV_PROBED; + if (ncsi_check_hwa(ndp)) + ncsi_enable_hwa(ndp); + else + ncsi_choose_active_channel(ndp); + return; + } + + /* Select the active package */ + ndp->pending_req_num = 1; + nca.type = NCSI_PKT_CMD_SP; + nca.bytes[0] = 1; + nca.package = ndp->active_package->id; + nca.channel = 0x1f; + ret = ncsi_xmit_cmd(&nca); + if (ret) + goto error; + + nd->state = ncsi_dev_state_probe_cis; + break; + case ncsi_dev_state_probe_cis: + ndp->pending_req_num = 32; + + /* Clear initial state */ + nca.type = NCSI_PKT_CMD_CIS; + nca.package = ndp->active_package->id; + for (index = 0; index < 0x20; index++) { + nca.channel = index; + ret = ncsi_xmit_cmd(&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 active package */ + nca.type = NCSI_PKT_CMD_DP; + nca.package = ndp->active_package->id; + nca.channel = 0x1f; + ret = ncsi_xmit_cmd(&nca); + if (ret) + goto error; + + /* Scan channels in next package */ + nd->state = ncsi_dev_state_probe_channel; + break; + default: + netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n", + nd->state); + } + + return; +error: + 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) { + old_state = xchg(&nc->state, NCSI_CHANNEL_INVISIBLE); + list_del_init(&nc->link); + } + spin_unlock_irqrestore(&ndp->lock, flags); + + ndp->active_channel = nc; + ndp->active_package = nc ? nc->package : NULL; + if (!nc) { + if (ndp->flags & NCSI_DEV_RESHUFFLE) { + ndp->flags &= ~NCSI_DEV_RESHUFFLE; + return ncsi_choose_active_channel(ndp); + } + + ncsi_report_link(ndp, false); + return -ENODEV; + } + + switch (old_state) { + case NCSI_CHANNEL_INACTIVE: + ndp->ndev.state = ncsi_dev_state_config; + ncsi_configure_channel(ndp); + break; + case NCSI_CHANNEL_ACTIVE: + ndp->ndev.state = ncsi_dev_state_suspend; + ncsi_suspend_channel(ndp); + break; + default: + netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n", + nc->state, nc->package->id, nc->id); + ncsi_report_link(ndp, false); + return -EINVAL; + } + + return 0; +} + +#if IS_ENABLED(CONFIG_IPV6) +static int ncsi_inet6addr_event(struct notifier_block *this, + unsigned long event, void *data) +{ + struct inet6_ifaddr *ifa = data; + struct net_device *dev = ifa->idev->dev; + struct ncsi_dev *nd = ncsi_find_dev(dev); + struct ncsi_dev_priv *ndp = nd ? TO_NCSI_DEV_PRIV(nd) : NULL; + struct ncsi_package *np; + struct ncsi_channel *nc; + struct ncsi_cmd_arg nca; + bool action; + int ret; + + if (!ndp || (ipv6_addr_type(&ifa->addr) & + (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK))) + return NOTIFY_OK; + + switch (event) { + case NETDEV_UP: + action = (++ndp->inet6_addr_num) == 1; + nca.type = NCSI_PKT_CMD_EGMF; + break; + case NETDEV_DOWN: + action = (--ndp->inet6_addr_num == 0); + nca.type = NCSI_PKT_CMD_DGMF; + break; + default: + return NOTIFY_OK; + } + + /* We might not have active channel or packages. The IPv6 + * required multicast will be enabled when active channel + * or packages are chosen. + */ + np = ndp->active_package; + nc = ndp->active_channel; + if (!action || !np || !nc) + return NOTIFY_OK; + + /* We needn't enable or disable it if the function isn't supported */ + if (!(nc->caps[NCSI_CAP_GENERIC].cap & NCSI_CAP_GENERIC_MC)) + return NOTIFY_OK; + + nca.ndp = ndp; + nca.driven = false; + nca.package = np->id; + nca.channel = nc->id; + nca.dwords[0] = nc->caps[NCSI_CAP_MC].cap; + ret = ncsi_xmit_cmd(&nca); + if (ret) { + netdev_warn(dev, "Fail to %s global multicast filter (%d)\n", + (event == NETDEV_UP) ? "enable" : "disable", ret); + return NOTIFY_DONE; + } + + return NOTIFY_OK; +} + +static struct notifier_block ncsi_inet6addr_notifier = { + .notifier_call = ncsi_inet6addr_event, +}; +#endif /* CONFIG_IPV6 */ + struct ncsi_dev *ncsi_register_dev(struct net_device *dev, void (*handler)(struct ncsi_dev *ndev)) { @@ -397,6 +1105,9 @@ struct ncsi_dev *ncsi_register_dev(struct net_device *dev, nd->state = ncsi_dev_state_registered; nd->dev = dev; nd->handler = handler; + ndp->pending_req_num = 0; + INIT_LIST_HEAD(&ndp->channel_queue); + INIT_WORK(&ndp->work, ncsi_dev_work); /* Initialize private NCSI device */ spin_lock_init(&ndp->lock); @@ -411,24 +1122,76 @@ struct ncsi_dev *ncsi_register_dev(struct net_device *dev, } spin_lock_irqsave(&ncsi_dev_lock, flags); +#if IS_ENABLED(CONFIG_IPV6) + ndp->inet6_addr_num = 0; + if (list_empty(&ncsi_dev_list)) + register_inet6addr_notifier(&ncsi_inet6addr_notifier); +#endif 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); + 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); + struct ncsi_package *np; + struct ncsi_channel *nc; + int old_state, ret; + + if (nd->state != ncsi_dev_state_registered && + nd->state != ncsi_dev_state_functional) + return -ENOTTY; + + if (!(ndp->flags & NCSI_DEV_PROBED)) { + nd->state = ncsi_dev_state_probe; + schedule_work(&ndp->work); + return 0; + } + + /* Reset channel's state and start over */ + NCSI_FOR_EACH_PACKAGE(ndp, np) { + NCSI_FOR_EACH_CHANNEL(np, nc) { + old_state = xchg(&nc->state, NCSI_CHANNEL_INACTIVE); + WARN_ON_ONCE(!list_empty(&nc->link) || + old_state == NCSI_CHANNEL_INVISIBLE); + } + } + + if (ndp->flags & NCSI_DEV_HWA) + ret = ncsi_enable_hwa(ndp); + else + ret = ncsi_choose_active_channel(ndp); + + return ret; +} +EXPORT_SYMBOL_GPL(ncsi_start_dev); + 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); +#if IS_ENABLED(CONFIG_IPV6) + if (list_empty(&ncsi_dev_list)) + unregister_inet6addr_notifier(&ncsi_inet6addr_notifier); +#endif spin_unlock_irqrestore(&ncsi_dev_lock, flags); kfree(ndp); diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c index 6ec25cb..a21af88 100644 --- a/net/ncsi/ncsi-rsp.c +++ b/net/ncsi/ncsi-rsp.c @@ -69,6 +69,9 @@ static int ncsi_rsp_handler_cis(struct ncsi_request *nr) rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, &np, &nc); if (!nc) { + if (ndp->flags & NCSI_DEV_PROBED) + return -ENXIO; + id = NCSI_CHANNEL_INDEX(rsp->rsp.common.channel); nc = ncsi_add_channel(np, id); } @@ -90,6 +93,9 @@ static int ncsi_rsp_handler_sp(struct ncsi_request *nr) ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, &np, NULL); if (!np) { + if (ndp->flags & NCSI_DEV_PROBED) + return -ENXIO; + id = NCSI_PACKAGE_INDEX(rsp->rsp.common.channel); np = ncsi_add_package(ndp, id); if (!np) @@ -297,6 +303,7 @@ static int ncsi_rsp_handler_gls(struct ncsi_request *nr) struct ncsi_dev_priv *ndp = nr->ndp; struct ncsi_channel *nc; struct ncsi_channel_mode *ncm; + unsigned long flags; /* Find the package and channel */ rsp = (struct ncsi_rsp_gls_pkt *)skb_network_header(nr->rsp); @@ -310,6 +317,14 @@ static int ncsi_rsp_handler_gls(struct ncsi_request *nr) ncm->data[3] = ntohl(rsp->other); ncm->data[4] = ntohl(rsp->oem_status); + if (nr->driven) + return 0; + + /* Reset the channel monitor if it has been enabled */ + spin_lock_irqsave(&nc->lock, flags); + nc->timeout = 0; + spin_unlock_irqrestore(&nc->lock, flags); + return 0; } |
