From cd339a0ed61097d92ce03b6d1042b1e4d58535e7 Mon Sep 17 00:00:00 2001 From: Michael Chan Date: Thu, 25 Aug 2005 15:35:24 -0700 Subject: [PATCH] [BNX2]: speedup serdes linkup This speeds up link-up time on 5706 SerDes if the link partner does not autoneg, a rather common scenario in blade servers. Some blade servers use IPMI for keyboard input and it's important to minimize link disruptions. The speedup is achieved by shortening the timer to (HZ / 3) during the transient period right after initiating a SerDes autoneg. If autoneg does not complete, parallel detect can be done sooner. After the transient period is over, the timer goes back to its normal HZ interval. As suggested by Jeff Garzik, the timer initialization is moved to bnx2_init_board() from bnx2_open(). An eeprom bit is also added to allow default forced SerDes speed for even faster link-up time. Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/bnx2.c | 52 +++++++++++++++++++++++++++++++++++----------- drivers/net/bnx2.h | 6 +++++- 2 files changed, 45 insertions(+), 13 deletions(-) diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c index 635a5856102b..015ff7906601 100644 --- a/drivers/net/bnx2.c +++ b/drivers/net/bnx2.c @@ -806,7 +806,19 @@ bnx2_setup_serdes_phy(struct bnx2 *bp) bnx2_write_phy(bp, MII_ADVERTISE, new_adv); bnx2_write_phy(bp, MII_BMCR, bmcr | BMCR_ANRESTART | BMCR_ANENABLE); - bp->serdes_an_pending = SERDES_AN_TIMEOUT / bp->timer_interval; + if (CHIP_NUM(bp) == CHIP_NUM_5706) { + /* Speed up link-up time when the link partner + * does not autonegotiate which is very common + * in blade servers. Some blade servers use + * IPMI for kerboard input and it's important + * to minimize link disruptions. Autoneg. involves + * exchanging base pages plus 3 next pages and + * normally completes in about 120 msec. + */ + bp->current_interval = SERDES_AN_TIMEOUT; + bp->serdes_an_pending = 1; + mod_timer(&bp->timer, jiffies + bp->current_interval); + } } return 0; @@ -3800,6 +3812,9 @@ bnx2_timer(unsigned long data) struct bnx2 *bp = (struct bnx2 *) data; u32 msg; + if (!netif_running(bp->dev)) + return; + if (atomic_read(&bp->intr_sem) != 0) goto bnx2_restart_timer; @@ -3817,6 +3832,8 @@ bnx2_timer(unsigned long data) else if ((bp->link_up == 0) && (bp->autoneg & AUTONEG_SPEED)) { u32 bmcr; + bp->current_interval = bp->timer_interval; + bnx2_read_phy(bp, MII_BMCR, &bmcr); if (bmcr & BMCR_ANENABLE) { @@ -3859,14 +3876,14 @@ bnx2_timer(unsigned long data) } } + else + bp->current_interval = bp->timer_interval; spin_unlock_irqrestore(&bp->phy_lock, flags); } bnx2_restart_timer: - bp->timer.expires = RUN_AT(bp->timer_interval); - - add_timer(&bp->timer); + mod_timer(&bp->timer, jiffies + bp->current_interval); } /* Called with rtnl_lock */ @@ -3919,12 +3936,7 @@ bnx2_open(struct net_device *dev) return rc; } - init_timer(&bp->timer); - - bp->timer.expires = RUN_AT(bp->timer_interval); - bp->timer.data = (unsigned long) bp; - bp->timer.function = bnx2_timer; - add_timer(&bp->timer); + mod_timer(&bp->timer, jiffies + bp->current_interval); atomic_set(&bp->intr_sem, 0); @@ -4485,8 +4497,9 @@ bnx2_nway_reset(struct net_device *dev) spin_lock_irq(&bp->phy_lock); if (CHIP_NUM(bp) == CHIP_NUM_5706) { - bp->serdes_an_pending = SERDES_AN_TIMEOUT / - bp->timer_interval; + bp->current_interval = SERDES_AN_TIMEOUT; + bp->serdes_an_pending = 1; + mod_timer(&bp->timer, jiffies + bp->current_interval); } } @@ -5315,6 +5328,7 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev) bp->stats_ticks = 1000000 & 0xffff00; bp->timer_interval = HZ; + bp->current_interval = HZ; /* Disable WOL support if we are running on a SERDES chip. */ if (CHIP_BOND_ID(bp) & CHIP_BOND_ID_SERDES_BIT) { @@ -5338,6 +5352,15 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev) bp->req_line_speed = 0; if (bp->phy_flags & PHY_SERDES_FLAG) { bp->advertising = ETHTOOL_ALL_FIBRE_SPEED | ADVERTISED_Autoneg; + + reg = REG_RD_IND(bp, HOST_VIEW_SHMEM_BASE + + BNX2_PORT_HW_CFG_CONFIG); + reg &= BNX2_PORT_HW_CFG_CFG_DFLT_LINK_MASK; + if (reg == BNX2_PORT_HW_CFG_CFG_DFLT_LINK_1G) { + bp->autoneg = 0; + bp->req_line_speed = bp->line_speed = SPEED_1000; + bp->req_duplex = DUPLEX_FULL; + } } else { bp->advertising = ETHTOOL_ALL_COPPER_SPEED | ADVERTISED_Autoneg; @@ -5345,6 +5368,11 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev) bp->req_flow_ctrl = FLOW_CTRL_RX | FLOW_CTRL_TX; + init_timer(&bp->timer); + bp->timer.expires = RUN_AT(bp->timer_interval); + bp->timer.data = (unsigned long) bp; + bp->timer.function = bnx2_timer; + return 0; err_out_unmap: diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h index 63b94ca0018b..e1fb099acbf2 100644 --- a/drivers/net/bnx2.h +++ b/drivers/net/bnx2.h @@ -3872,6 +3872,7 @@ struct bnx2 { char *name; int timer_interval; + int current_interval; struct timer_list timer; struct work_struct reset_task; int in_reset_task; @@ -3986,7 +3987,7 @@ struct bnx2 { #define PHY_LOOPBACK 2 u8 serdes_an_pending; -#define SERDES_AN_TIMEOUT (2 * HZ) +#define SERDES_AN_TIMEOUT (HZ / 3) u8 mac_addr[8]; @@ -4172,6 +4173,9 @@ struct fw_info { #define BNX2_PORT_HW_CFG_MAC_LOWER 0x00000054 #define BNX2_PORT_HW_CFG_CONFIG 0x00000058 +#define BNX2_PORT_HW_CFG_CFG_DFLT_LINK_MASK 0x001f0000 +#define BNX2_PORT_HW_CFG_CFG_DFLT_LINK_AN 0x00000000 +#define BNX2_PORT_HW_CFG_CFG_DFLT_LINK_1G 0x00030000 #define BNX2_PORT_HW_CFG_IMD_MAC_A_UPPER 0x00000068 #define BNX2_PORT_HW_CFG_IMD_MAC_A_LOWER 0x0000006c -- 2.20.1