From fce55922f5299a04c0a56b170a141fab34f13465 Mon Sep 17 00:00:00 2001 From: "Allan, Bruce W" Date: Wed, 13 Apr 2011 13:09:10 +0000 Subject: [PATCH] ethtool: allow custom interval for physical identification When physical identification of an adapter is done by toggling the mechanism on and off through software utilizing the set_phys_id operation, it is done with a fixed duration for both on and off states. Some drivers may want to set a custom duration for the on/off intervals. This patch changes the API so the return code from the driver's entry point when it is called with ETHTOOL_ID_ACTIVE can specify the frequency at which to cycle the on/off states, and updates the drivers that have already been converted to use the new set_phys_id and use the synchronous method for identifying an adapter. The physical identification frequency set in the updated drivers is based on how it was done prior to the introduction of set_phys_id. Compile tested only. Also fixes a compiler warning in sfc. v2: drivers do not return -EINVAL for ETHOOL_ID_ACTIVE v3: fold patchset into single patch and cleanup per Ben's feedback Signed-off-by: Bruce Allan Cc: Ben Hutchings Cc: Sathya Perla Cc: Subbu Seetharaman Cc: Ajit Khaparde Cc: Michael Chan Cc: Eilon Greenstein Cc: Divy Le Ray Cc: Don Fry Cc: Jon Mason Cc: Solarflare linux maintainers Cc: Steve Hodgson Cc: Stephen Hemminger Cc: Matt Carlson Acked-by: Jon Mason Acked-by: Ben Hutchings Signed-off-by: David S. Miller --- drivers/net/benet/be_ethtool.c | 2 +- drivers/net/bnx2.c | 2 +- drivers/net/bnx2x/bnx2x_ethtool.c | 2 +- drivers/net/cxgb3/cxgb3_main.c | 2 +- drivers/net/ewrk3.c | 2 +- drivers/net/niu.c | 2 +- drivers/net/pcnet32.c | 2 +- drivers/net/s2io.c | 2 +- drivers/net/sfc/ethtool.c | 6 +++--- drivers/net/skge.c | 2 +- drivers/net/sky2.c | 2 +- drivers/net/tg3.c | 2 +- include/linux/ethtool.h | 6 ++++-- net/core/ethtool.c | 31 ++++++++++++++++--------------- 14 files changed, 34 insertions(+), 31 deletions(-) diff --git a/drivers/net/benet/be_ethtool.c b/drivers/net/benet/be_ethtool.c index 96f5502e0ef7..80226e4801f3 100644 --- a/drivers/net/benet/be_ethtool.c +++ b/drivers/net/benet/be_ethtool.c @@ -516,7 +516,7 @@ be_set_phys_id(struct net_device *netdev, case ETHTOOL_ID_ACTIVE: be_cmd_get_beacon_state(adapter, adapter->hba_port_num, &adapter->beacon_state); - return -EINVAL; + return 1; /* cycle on/off once per second */ case ETHTOOL_ID_ON: be_cmd_set_beacon_state(adapter, adapter->hba_port_num, 0, 0, diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c index 0a52079bafef..bf729ee6acbd 100644 --- a/drivers/net/bnx2.c +++ b/drivers/net/bnx2.c @@ -7473,7 +7473,7 @@ bnx2_set_phys_id(struct net_device *dev, enum ethtool_phys_id_state state) bp->leds_save = REG_RD(bp, BNX2_MISC_CFG); REG_WR(bp, BNX2_MISC_CFG, BNX2_MISC_CFG_LEDMODE_MAC); - return -EINVAL; + return 1; /* cycle on/off once per second */ case ETHTOOL_ID_ON: REG_WR(bp, BNX2_EMAC_LED, BNX2_EMAC_LED_OVERRIDE | diff --git a/drivers/net/bnx2x/bnx2x_ethtool.c b/drivers/net/bnx2x/bnx2x_ethtool.c index ad7d91e499f4..0a5e88d6ba2c 100644 --- a/drivers/net/bnx2x/bnx2x_ethtool.c +++ b/drivers/net/bnx2x/bnx2x_ethtool.c @@ -2025,7 +2025,7 @@ static int bnx2x_set_phys_id(struct net_device *dev, switch (state) { case ETHTOOL_ID_ACTIVE: - return -EINVAL; + return 1; /* cycle on/off once per second */ case ETHTOOL_ID_ON: bnx2x_set_led(&bp->link_params, &bp->link_vars, diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c index 802c7a7c3b25..a087e0691dce 100644 --- a/drivers/net/cxgb3/cxgb3_main.c +++ b/drivers/net/cxgb3/cxgb3_main.c @@ -1757,7 +1757,7 @@ static int set_phys_id(struct net_device *dev, switch (state) { case ETHTOOL_ID_ACTIVE: - return -EINVAL; + return 1; /* cycle on/off once per second */ case ETHTOOL_ID_OFF: t3_set_reg_field(adapter, A_T3DBG_GPIO_EN, F_GPIO0_OUT_VAL, 0); diff --git a/drivers/net/ewrk3.c b/drivers/net/ewrk3.c index c7ce4438e923..17b6027d8be8 100644 --- a/drivers/net/ewrk3.c +++ b/drivers/net/ewrk3.c @@ -1618,7 +1618,7 @@ static int ewrk3_set_phys_id(struct net_device *dev, /* Prevent ISR from twiddling the LED */ lp->led_mask = 0; spin_unlock_irq(&lp->hw_lock); - return -EINVAL; + return 2; /* cycle on/off twice per second */ case ETHTOOL_ID_ON: cr = inb(EWRK3_CR); diff --git a/drivers/net/niu.c b/drivers/net/niu.c index 3fa1e9cdb4a8..ea2272f0f37e 100644 --- a/drivers/net/niu.c +++ b/drivers/net/niu.c @@ -7896,7 +7896,7 @@ static int niu_set_phys_id(struct net_device *dev, switch (state) { case ETHTOOL_ID_ACTIVE: np->orig_led_state = niu_led_state_save(np); - return -EINVAL; + return 1; /* cycle on/off once per second */ case ETHTOOL_ID_ON: niu_force_led(np, 1); diff --git a/drivers/net/pcnet32.c b/drivers/net/pcnet32.c index e89afb929740..0a1efbae1bc0 100644 --- a/drivers/net/pcnet32.c +++ b/drivers/net/pcnet32.c @@ -1038,7 +1038,7 @@ static int pcnet32_set_phys_id(struct net_device *dev, for (i = 4; i < 8; i++) lp->save_regs[i - 4] = a->read_bcr(ioaddr, i); spin_unlock_irqrestore(&lp->lock, flags); - return -EINVAL; + return 2; /* cycle on/off twice per second */ case ETHTOOL_ID_ON: case ETHTOOL_ID_OFF: diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c index 2d5cc6142c04..2302d9743744 100644 --- a/drivers/net/s2io.c +++ b/drivers/net/s2io.c @@ -5541,7 +5541,7 @@ static int s2io_ethtool_set_led(struct net_device *dev, switch (state) { case ETHTOOL_ID_ACTIVE: sp->adapt_ctrl_org = readq(&bar0->gpio_control); - return -EINVAL; + return 1; /* cycle on/off once per second */ case ETHTOOL_ID_ON: s2io_set_led(sp, true); diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c index 644f7c1d6e7b..5d8468fc5804 100644 --- a/drivers/net/sfc/ethtool.c +++ b/drivers/net/sfc/ethtool.c @@ -182,7 +182,7 @@ static int efx_ethtool_phys_id(struct net_device *net_dev, enum ethtool_phys_id_state state) { struct efx_nic *efx = netdev_priv(net_dev); - enum efx_led_mode mode; + enum efx_led_mode mode = EFX_LED_DEFAULT; switch (state) { case ETHTOOL_ID_ON: @@ -194,8 +194,8 @@ static int efx_ethtool_phys_id(struct net_device *net_dev, case ETHTOOL_ID_INACTIVE: mode = EFX_LED_DEFAULT; break; - default: - return -EINVAL; + case ETHTOOL_ID_ACTIVE: + return 1; /* cycle on/off once per second */ } efx->type->set_id_led(efx, mode); diff --git a/drivers/net/skge.c b/drivers/net/skge.c index 310dcbce2519..176d784cbb54 100644 --- a/drivers/net/skge.c +++ b/drivers/net/skge.c @@ -753,7 +753,7 @@ static int skge_set_phys_id(struct net_device *dev, switch (state) { case ETHTOOL_ID_ACTIVE: - return -EINVAL; + return 2; /* cycle on/off twice per second */ case ETHTOOL_ID_ON: skge_led(skge, LED_MODE_TST); diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index a4b8fe564eb0..c8d045114c66 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -3813,7 +3813,7 @@ static int sky2_set_phys_id(struct net_device *dev, switch (state) { case ETHTOOL_ID_ACTIVE: - return -EINVAL; + return 1; /* cycle on/off once per second */ case ETHTOOL_ID_INACTIVE: sky2_led(sky2, MO_LED_NORM); break; diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 10fa476fede3..9915734ac3e9 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -10384,7 +10384,7 @@ static int tg3_set_phys_id(struct net_device *dev, switch (state) { case ETHTOOL_ID_ACTIVE: - return -EINVAL; + return 1; /* cycle on/off once per second */ case ETHTOOL_ID_ON: tw32(MAC_LED_CTRL, LED_CTRL_LNKLED_OVERRIDE | diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index ad22a68c2e5d..9de31274341d 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -798,8 +798,10 @@ bool ethtool_invalid_flags(struct net_device *dev, u32 data, u32 supported); * attached to it. The implementation may update the indicator * asynchronously or synchronously, but in either case it must return * quickly. It is initially called with the argument %ETHTOOL_ID_ACTIVE, - * and must either activate asynchronous updates or return -%EINVAL. - * If it returns -%EINVAL then it will be called again at intervals with + * and must either activate asynchronous updates and return zero, return + * a negative error or return a positive frequency for synchronous + * indication (e.g. 1 for one on/off cycle per second). If it returns + * a frequency then it will be called again at intervals with the * argument %ETHTOOL_ID_ON or %ETHTOOL_ID_OFF and should set the state of * the indicator accordingly. Finally, it is called with the argument * %ETHTOOL_ID_INACTIVE and must deactivate the indicator. Returns a diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 41dee2de13ad..13d79f5a86e5 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -1669,7 +1669,7 @@ static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) return dev->ethtool_ops->phys_id(dev, id.data); rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); - if (rc && rc != -EINVAL) + if (rc < 0) return rc; /* Drop the RTNL lock while waiting, but prevent reentry or @@ -1684,21 +1684,22 @@ static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) schedule_timeout_interruptible( id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); } else { - /* Driver expects to be called periodically */ + /* Driver expects to be called at twice the frequency in rc */ + int n = rc * 2, i, interval = HZ / n; + + /* Count down seconds */ do { - rtnl_lock(); - rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ON); - rtnl_unlock(); - if (rc) - break; - schedule_timeout_interruptible(HZ / 2); - - rtnl_lock(); - rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_OFF); - rtnl_unlock(); - if (rc) - break; - schedule_timeout_interruptible(HZ / 2); + /* Count down iterations per second */ + i = n; + do { + rtnl_lock(); + rc = dev->ethtool_ops->set_phys_id(dev, + (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); + rtnl_unlock(); + if (rc) + break; + schedule_timeout_interruptible(interval); + } while (!signal_pending(current) && --i != 0); } while (!signal_pending(current) && (id.data == 0 || --id.data != 0)); } -- 2.30.2