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Date: Thu, 13 May 2010 06:07:49 -0700 From: Amit Kumar Salecha <amit.salecha@...gic.com> To: davem@...emloft.net Cc: netdev@...r.kernel.org, ameen.rahman@...gic.com, Sucheta Chakraborty <sucheta.chakraborty@...gic.com> Subject: [PATCH NEXT 8/9] qlcnic: support quisce mode From: Sucheta Chakraborty <sucheta.chakraborty@...gic.com> Device can go to quiescent state, during which drivers should refrain from using the device. Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@...gic.com> Signed-off-by: Amit Kumar Salecha <amit.salecha@...gic.com> --- drivers/net/qlcnic/qlcnic_main.c | 28 ++++++++++++++++++++++++++-- 1 files changed, 26 insertions(+), 2 deletions(-) diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c index ce57229..ce8118c 100644 --- a/drivers/net/qlcnic/qlcnic_main.c +++ b/drivers/net/qlcnic/qlcnic_main.c @@ -2044,8 +2044,11 @@ 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, @@ -2076,6 +2079,14 @@ 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); @@ -2085,6 +2096,17 @@ 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); @@ -2107,6 +2129,8 @@ 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); -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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