From f34d28ea0174df63253dc20a95de0b48e3d8145a Mon Sep 17 00:00:00 2001 From: Eilon Greenstein Date: Thu, 15 Oct 2009 00:18:08 -0700 Subject: [PATCH] bnx2x: Changing the Disabled state to a flag When working with DCC, a function can be disabled or enabled (virtual link down or up). Using the function state introduced some race conditions with the load/unload flow. Using a separate flag to indicate that the function is disabled. Signed-off-by: Eilon Greenstein Signed-off-by: David S. Miller --- drivers/net/bnx2x.h | 2 +- drivers/net/bnx2x_main.c | 34 +++++++++++++++++++--------------- 2 files changed, 20 insertions(+), 16 deletions(-) diff --git a/drivers/net/bnx2x.h b/drivers/net/bnx2x.h index 60fa14f31d7..185a6bab222 100644 --- a/drivers/net/bnx2x.h +++ b/drivers/net/bnx2x.h @@ -900,6 +900,7 @@ struct bnx2x { #define BP_NOMCP(bp) (bp->flags & NO_MCP_FLAG) #define HW_VLAN_TX_FLAG 0x400 #define HW_VLAN_RX_FLAG 0x800 +#define MF_FUNC_DIS 0x1000 int func; #define BP_PORT(bp) (bp->func % PORT_MAX) @@ -965,7 +966,6 @@ struct bnx2x { #define BNX2X_STATE_CLOSING_WAIT4_HALT 0x4000 #define BNX2X_STATE_CLOSING_WAIT4_DELETE 0x5000 #define BNX2X_STATE_CLOSING_WAIT4_UNLOAD 0x6000 -#define BNX2X_STATE_DISABLED 0xd000 #define BNX2X_STATE_DIAG 0xe000 #define BNX2X_STATE_ERROR 0xf000 diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c index 691cf154189..e7b3b27d16b 100644 --- a/drivers/net/bnx2x_main.c +++ b/drivers/net/bnx2x_main.c @@ -1043,7 +1043,6 @@ static void bnx2x_sp_event(struct bnx2x_fastpath *fp, break; case (RAMROD_CMD_ID_ETH_SET_MAC | BNX2X_STATE_CLOSING_WAIT4_HALT): - case (RAMROD_CMD_ID_ETH_SET_MAC | BNX2X_STATE_DISABLED): DP(NETIF_MSG_IFDOWN, "got (un)set mac ramrod\n"); bp->set_mac_pending--; smp_wmb(); @@ -2157,7 +2156,7 @@ static void bnx2x_calc_fc_adv(struct bnx2x *bp) static void bnx2x_link_report(struct bnx2x *bp) { - if (bp->state == BNX2X_STATE_DISABLED) { + if (bp->flags & MF_FUNC_DIS) { netif_carrier_off(bp->dev); printk(KERN_ERR PFX "%s NIC Link is Down\n", bp->dev->name); return; @@ -2437,8 +2436,7 @@ static void bnx2x_link_attn(struct bnx2x *bp) memset(&(pstats->mac_stx[0]), 0, sizeof(struct mac_stx)); } - if ((bp->state == BNX2X_STATE_OPEN) || - (bp->state == BNX2X_STATE_DISABLED)) + if (bp->state == BNX2X_STATE_OPEN) bnx2x_stats_handle(bp, STATS_EVENT_LINK_UP); } @@ -2481,9 +2479,7 @@ static void bnx2x_link_attn(struct bnx2x *bp) static void bnx2x__link_status_update(struct bnx2x *bp) { - int func = BP_FUNC(bp); - - if (bp->state != BNX2X_STATE_OPEN) + if ((bp->state != BNX2X_STATE_OPEN) || (bp->flags & MF_FUNC_DIS)) return; bnx2x_link_status_update(&bp->link_params, &bp->link_vars); @@ -2640,14 +2636,19 @@ static void bnx2x_dcc_event(struct bnx2x *bp, u32 dcc_event) if (dcc_event & DRV_STATUS_DCC_DISABLE_ENABLE_PF) { + /* + * This is the only place besides the function initialization + * where the bp->flags can change so it is done without any + * locks + */ if (bp->mf_config & FUNC_MF_CFG_FUNC_DISABLED) { DP(NETIF_MSG_IFDOWN, "mf_cfg function disabled\n"); - bp->state = BNX2X_STATE_DISABLED; + bp->flags |= MF_FUNC_DIS; bnx2x_e1h_disable(bp); } else { DP(NETIF_MSG_IFUP, "mf_cfg function enabled\n"); - bp->state = BNX2X_STATE_OPEN; + bp->flags &= ~MF_FUNC_DIS; bnx2x_e1h_enable(bp); } @@ -4695,8 +4696,7 @@ static void bnx2x_timer(unsigned long data) } } - if ((bp->state == BNX2X_STATE_OPEN) || - (bp->state == BNX2X_STATE_DISABLED)) + if (bp->state == BNX2X_STATE_OPEN) bnx2x_stats_handle(bp, STATS_EVENT_UPDATE); timer_restart: @@ -7629,7 +7629,7 @@ static int bnx2x_nic_load(struct bnx2x *bp, int load_mode) if (CHIP_IS_E1H(bp)) if (bp->mf_config & FUNC_MF_CFG_FUNC_DISABLED) { DP(NETIF_MSG_IFUP, "mf_cfg function disabled\n"); - bp->state = BNX2X_STATE_DISABLED; + bp->flags |= MF_FUNC_DIS; } if (bp->state == BNX2X_STATE_OPEN) { @@ -9034,7 +9034,9 @@ static int bnx2x_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) cmd->supported = bp->port.supported; cmd->advertising = bp->port.advertising; - if (netif_carrier_ok(dev)) { + if ((bp->state == BNX2X_STATE_OPEN) && + !(bp->flags & MF_FUNC_DIS) && + (bp->link_vars.link_up)) { cmd->speed = bp->link_vars.line_speed; cmd->duplex = bp->link_vars.duplex; if (IS_E1HMF(bp)) { @@ -9433,6 +9435,9 @@ static u32 bnx2x_get_link(struct net_device *dev) { struct bnx2x *bp = netdev_priv(dev); + if (bp->flags & MF_FUNC_DIS) + return 0; + return bp->link_vars.link_up; } @@ -9837,8 +9842,7 @@ static int bnx2x_set_eeprom(struct net_device *dev, } else if (eeprom->magic == 0x50485952) { /* 'PHYR' (0x50485952): re-init link after FW upgrade */ - if ((bp->state == BNX2X_STATE_OPEN) || - (bp->state == BNX2X_STATE_DISABLED)) { + if (bp->state == BNX2X_STATE_OPEN) { bnx2x_acquire_phy_lock(bp); rc |= bnx2x_link_reset(&bp->link_params, &bp->link_vars, 1); -- 2.41.0