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net/i40e: fix global register recovery

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PMD configures the global register I40E_GLINT_CTL during
device initialization to work around the Rx write back
issue. But when a device is bound from DPDK to kernel,
the global register is not recovered to the original
state, it will cause kernel driver performance drop issue.
This patch fixes this issue.

Fixes: be6c228d4d ("i40e: support Rx interrupt")
Fixes: 4ab831449a ("net/i40e: fix interrupt conflict with multi-driver")
Cc: stable@dpdk.org

Signed-off-by: Beilei Xing <beilei.xing@intel.com>
Acked-by: Jeff Guo <jia.guo@intel.com>
This commit is contained in:
Beilei Xing 2020-11-20 16:49:47 +08:00 committed by Ferruh Yigit
parent c17af95a19
commit ac241c74ac
1 changed files with 17 additions and 0 deletions
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17
drivers/net/i40e/i40e_ethdev.c
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@ -763,6 +763,21 @@ static inline void i40e_config_automask(struct i40e_pf *pf)
I40E_WRITE_REG(hw, I40E_GLINT_CTL, val);
}
static inline void i40e_clear_automask(struct i40e_pf *pf)
{
struct i40e_hw *hw = I40E_PF_TO_HW(pf);
uint32_t val;
val = I40E_READ_REG(hw, I40E_GLINT_CTL);
val &= ~(I40E_GLINT_CTL_DIS_AUTOMASK_PF0_MASK |
I40E_GLINT_CTL_DIS_AUTOMASK_VF0_MASK);
if (!pf->support_multi_driver)
val &= ~I40E_GLINT_CTL_DIS_AUTOMASK_N_MASK;
I40E_WRITE_REG(hw, I40E_GLINT_CTL, val);
}
#define I40E_FLOW_CONTROL_ETHERTYPE 0x8808
/*
@ -2741,6 +2756,8 @@ i40e_dev_close(struct rte_eth_dev *dev)
/* Remove all Traffic Manager configuration */
i40e_tm_conf_uninit(dev);
i40e_clear_automask(pf);
hw->adapter_closed = 1;
return ret;
}