From a5e463d0b1c123873d6f0c6cdd234041c87b7c80 Mon Sep 17 00:00:00 2001 From: Sucheta Chakraborty Date: Thu, 13 May 2010 03:07:49 +0000 Subject: [PATCH] qlcnic: support quisce mode Device can go to quiescent state, during which drivers should refrain from using the device. Signed-off-by: Sucheta Chakraborty Signed-off-by: Amit Kumar Salecha Signed-off-by: David S. Miller --- drivers/net/qlcnic/qlcnic_main.c | 28 ++++++++++++++++++++++++++-- 1 file changed, 26 insertions(+), 2 deletions(-) diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c index 79c6e0517bad..6a7b81388351 100644 --- a/drivers/net/qlcnic/qlcnic_main.c +++ b/drivers/net/qlcnic/qlcnic_main.c @@ -2043,8 +2043,11 @@ qlcnic_can_start_firmware(struct qlcnic_adapter *adapter) do { msleep(1000); - } while ((QLCRD32(adapter, QLCNIC_CRB_DEV_STATE) != QLCNIC_DEV_READY) - && --dev_init_timeo); + prev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE); + + if (prev_state == QLCNIC_DEV_QUISCENT) + continue; + } while ((prev_state != QLCNIC_DEV_READY) && --dev_init_timeo); if (!dev_init_timeo) { dev_err(&adapter->pdev->dev, @@ -2075,6 +2078,14 @@ qlcnic_fwinit_work(struct work_struct *work) if (qlcnic_api_lock(adapter)) goto err_ret; + dev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE); + if (dev_state == QLCNIC_DEV_QUISCENT) { + qlcnic_api_unlock(adapter); + qlcnic_schedule_work(adapter, qlcnic_fwinit_work, + FW_POLL_DELAY * 2); + return; + } + if (adapter->fw_wait_cnt++ > adapter->reset_ack_timeo) { dev_err(&adapter->pdev->dev, "Reset:Failed to get ack %d sec\n", adapter->reset_ack_timeo); @@ -2084,6 +2095,17 @@ qlcnic_fwinit_work(struct work_struct *work) if (!qlcnic_check_drv_state(adapter)) { skip_ack_check: dev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE); + + if (dev_state == QLCNIC_DEV_NEED_QUISCENT) { + QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, + QLCNIC_DEV_QUISCENT); + qlcnic_schedule_work(adapter, qlcnic_fwinit_work, + FW_POLL_DELAY * 2); + QLCDB(adapter, DRV, "Quiscing the driver\n"); + qlcnic_api_unlock(adapter); + return; + } + if (dev_state == QLCNIC_DEV_NEED_RESET) { QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_INITIALIZING); @@ -2106,6 +2128,8 @@ skip_ack_check: QLCDB(adapter, HW, "Func waiting: Device state=%u\n", dev_state); switch (dev_state) { + case QLCNIC_DEV_QUISCENT: + case QLCNIC_DEV_NEED_QUISCENT: case QLCNIC_DEV_NEED_RESET: qlcnic_schedule_work(adapter, qlcnic_fwinit_work, FW_POLL_DELAY);