From a8f447bda3ee00e3a3ab080c48db40078ea65221 Mon Sep 17 00:00:00 2001 From: Sathya Perla Date: Thu, 18 Jun 2009 00:10:27 +0000 Subject: be2net: receive asynchronous link status notifications from BE Rcv and process ansync link status notifications from BE instead of polling for link status in the be_worker thread. Signed-off-by: Sathya Perla Signed-off-by: David S. Miller --- drivers/net/benet/be.h | 6 +++++- drivers/net/benet/be_cmds.c | 34 +++++++++++++++++++++++++++------- drivers/net/benet/be_cmds.h | 36 +++++++++++++++++++++++++++++------- drivers/net/benet/be_main.c | 37 +++++++++++++++++++------------------ 4 files changed, 80 insertions(+), 33 deletions(-) (limited to 'drivers/net/benet') diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h index 94b75cb072f..f703758f0a6 100644 --- a/drivers/net/benet/be.h +++ b/drivers/net/benet/be.h @@ -163,6 +163,10 @@ struct be_ctrl_info { struct be_mcc_obj mcc_obj; spinlock_t mcc_lock; /* For serializing mcc cmds to BE card */ spinlock_t mcc_cq_lock; + + /* MCC Async callback */ + void (*async_cb)(void *adapter, bool link_up); + void *adapter_ctxt; }; #include "be_cmds.h" @@ -272,7 +276,7 @@ struct be_adapter { u32 if_handle; /* Used to configure filtering */ u32 pmac_id; /* MAC addr handle used by BE card */ - struct be_link_info link; + bool link_up; u32 port_num; bool promiscuous; }; diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c index 4a2e1f518f7..583517ed56f 100644 --- a/drivers/net/benet/be_cmds.c +++ b/drivers/net/benet/be_cmds.c @@ -69,6 +69,20 @@ static int be_mcc_compl_process(struct be_ctrl_info *ctrl, return 0; } +/* Link state evt is a string of bytes; no need for endian swapping */ +static void be_async_link_state_process(struct be_ctrl_info *ctrl, + struct be_async_event_link_state *evt) +{ + ctrl->async_cb(ctrl->adapter_ctxt, + evt->port_link_status == ASYNC_EVENT_LINK_UP ? true : false); +} + +static inline bool is_link_state_evt(u32 trailer) +{ + return (((trailer >> ASYNC_TRAILER_EVENT_CODE_SHIFT) & + ASYNC_TRAILER_EVENT_CODE_MASK) == + ASYNC_EVENT_CODE_LINK_STATE); +} static struct be_mcc_cq_entry *be_mcc_compl_get(struct be_ctrl_info *ctrl) { @@ -89,7 +103,14 @@ void be_process_mcc(struct be_ctrl_info *ctrl) spin_lock_bh(&ctrl->mcc_cq_lock); while ((compl = be_mcc_compl_get(ctrl))) { - if (!(compl->flags & CQE_FLAGS_ASYNC_MASK)) { + if (compl->flags & CQE_FLAGS_ASYNC_MASK) { + /* Interpret flags as an async trailer */ + BUG_ON(!is_link_state_evt(compl->flags)); + + /* Interpret compl as a async link evt */ + be_async_link_state_process(ctrl, + (struct be_async_event_link_state *) compl); + } else { be_mcc_compl_process(ctrl, compl); atomic_dec(&ctrl->mcc_obj.q.used); } @@ -786,13 +807,15 @@ int be_cmd_get_stats(struct be_ctrl_info *ctrl, struct be_dma_mem *nonemb_cmd) } int be_cmd_link_status_query(struct be_ctrl_info *ctrl, - struct be_link_info *link) + bool *link_up) { struct be_mcc_wrb *wrb = wrb_from_mbox(&ctrl->mbox_mem); struct be_cmd_req_link_status *req = embedded_payload(wrb); int status; spin_lock(&ctrl->mbox_lock); + + *link_up = false; memset(wrb, 0, sizeof(*wrb)); be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0); @@ -803,11 +826,8 @@ int be_cmd_link_status_query(struct be_ctrl_info *ctrl, status = be_mbox_db_ring(ctrl); if (!status) { struct be_cmd_resp_link_status *resp = embedded_payload(wrb); - link->speed = resp->mac_speed; - link->duplex = resp->mac_duplex; - link->fault = resp->mac_fault; - } else { - link->speed = PHY_LINK_SPEED_ZERO; + if (resp->mac_speed != PHY_LINK_SPEED_ZERO) + *link_up = true; } spin_unlock(&ctrl->mbox_lock); diff --git a/drivers/net/benet/be_cmds.h b/drivers/net/benet/be_cmds.h index a567aa437ec..747626da7b4 100644 --- a/drivers/net/benet/be_cmds.h +++ b/drivers/net/benet/be_cmds.h @@ -76,6 +76,34 @@ struct be_mcc_cq_entry { u32 flags; /* dword 3 */ }; +/* When the async bit of mcc_compl is set, the last 4 bytes of + * mcc_compl is interpreted as follows: + */ +#define ASYNC_TRAILER_EVENT_CODE_SHIFT 8 /* bits 8 - 15 */ +#define ASYNC_TRAILER_EVENT_CODE_MASK 0xFF +#define ASYNC_EVENT_CODE_LINK_STATE 0x1 +struct be_async_event_trailer { + u32 code; +}; + +enum { + ASYNC_EVENT_LINK_DOWN = 0x0, + ASYNC_EVENT_LINK_UP = 0x1 +}; + +/* When the event code of an async trailer is link-state, the mcc_compl + * must be interpreted as follows + */ +struct be_async_event_link_state { + u8 physical_port; + u8 port_link_status; + u8 port_duplex; + u8 port_speed; + u8 port_fault; + u8 rsvd0[7]; + struct be_async_event_trailer trailer; +} __packed; + struct be_mcc_mailbox { struct be_mcc_wrb wrb; struct be_mcc_cq_entry cqe; @@ -580,12 +608,6 @@ struct be_cmd_req_link_status { u32 rsvd; }; -struct be_link_info { - u8 duplex; - u8 speed; - u8 fault; -}; - enum { PHY_LINK_DUPLEX_NONE = 0x0, PHY_LINK_DUPLEX_HALF = 0x1, @@ -704,7 +726,7 @@ extern int be_cmd_rxq_create(struct be_ctrl_info *ctrl, extern int be_cmd_q_destroy(struct be_ctrl_info *ctrl, struct be_queue_info *q, int type); extern int be_cmd_link_status_query(struct be_ctrl_info *ctrl, - struct be_link_info *link); + bool *link_up); extern int be_cmd_reset(struct be_ctrl_info *ctrl); extern int be_cmd_get_stats(struct be_ctrl_info *ctrl, struct be_dma_mem *nonemb_cmd); diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c index 3dc68034c21..66c10c87f51 100644 --- a/drivers/net/benet/be_main.c +++ b/drivers/net/benet/be_main.c @@ -214,28 +214,24 @@ static void netdev_stats_update(struct be_adapter *adapter) dev_stats->tx_window_errors = 0; } -static void be_link_status_update(struct be_adapter *adapter) +void be_link_status_update(void *ctxt, bool link_up) { - struct be_link_info *prev = &adapter->link; - struct be_link_info now = { 0 }; + struct be_adapter *adapter = ctxt; struct net_device *netdev = adapter->netdev; - be_cmd_link_status_query(&adapter->ctrl, &now); - /* If link came up or went down */ - if (now.speed != prev->speed && (now.speed == PHY_LINK_SPEED_ZERO || - prev->speed == PHY_LINK_SPEED_ZERO)) { - if (now.speed == PHY_LINK_SPEED_ZERO) { - netif_stop_queue(netdev); - netif_carrier_off(netdev); - printk(KERN_INFO "%s: Link down\n", netdev->name); - } else { + if (adapter->link_up != link_up) { + if (link_up) { netif_start_queue(netdev); netif_carrier_on(netdev); printk(KERN_INFO "%s: Link up\n", netdev->name); + } else { + netif_stop_queue(netdev); + netif_carrier_off(netdev); + printk(KERN_INFO "%s: Link down\n", netdev->name); } + adapter->link_up = link_up; } - *prev = now; } /* Update the EQ delay n BE based on the RX frags consumed / sec */ @@ -1395,9 +1391,6 @@ static void be_worker(struct work_struct *work) container_of(work, struct be_adapter, work.work); int status; - /* Check link */ - be_link_status_update(adapter); - /* Get Stats */ status = be_cmd_get_stats(&adapter->ctrl, &adapter->stats.cmd); if (!status) @@ -1522,6 +1515,8 @@ static int be_open(struct net_device *netdev) struct be_ctrl_info *ctrl = &adapter->ctrl; struct be_eq_obj *rx_eq = &adapter->rx_eq; struct be_eq_obj *tx_eq = &adapter->tx_eq; + bool link_up; + int status; /* First time posting */ be_post_rx_frags(adapter); @@ -1540,7 +1535,10 @@ static int be_open(struct net_device *netdev) /* Rx compl queue may be in unarmed state; rearm it */ be_cq_notify(ctrl, adapter->rx_obj.cq.id, true, 0); - be_link_status_update(adapter); + status = be_cmd_link_status_query(ctrl, &link_up); + if (status) + return status; + be_link_status_update(adapter, link_up); schedule_delayed_work(&adapter->work, msecs_to_jiffies(100)); return 0; @@ -1617,7 +1615,7 @@ static int be_close(struct net_device *netdev) netif_stop_queue(netdev); netif_carrier_off(netdev); - adapter->link.speed = PHY_LINK_SPEED_ZERO; + adapter->link_up = false; be_intr_set(ctrl, false); @@ -1808,6 +1806,9 @@ static int be_ctrl_init(struct be_adapter *adapter) spin_lock_init(&ctrl->mcc_lock); spin_lock_init(&ctrl->mcc_cq_lock); + ctrl->async_cb = be_link_status_update; + ctrl->adapter_ctxt = adapter; + val = ioread32(ctrl->pcicfg + PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET); ctrl->pci_func = (val >> MEMBAR_CTRL_INT_CTRL_PFUNC_SHIFT) & MEMBAR_CTRL_INT_CTRL_PFUNC_MASK; 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