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net/i40e/base: avoid reset timeout issue

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This patch allows detection of upcoming core reset in case NIC gets
stuck while performing FLR reset. The i40e_pf_reset() function returns
I40E_ERR_NOT_READY when global reset was detected.

Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
This commit is contained in:
Jingjing Wu 2017-06-27 21:29:14 +08:00 committed by Ferruh Yigit
parent 156e15b5f7
commit 3c8b18c416
1 changed files with 8 additions and 0 deletions
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8
drivers/net/i40e/base/i40e_common.c
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@ -1382,6 +1382,8 @@ enum i40e_status_code i40e_pf_reset(struct i40e_hw *hw)
* we don't need to do the PF Reset
*/
if (!cnt) {
u32 reg2 = 0;
reg = rd32(hw, I40E_PFGEN_CTRL);
wr32(hw, I40E_PFGEN_CTRL,
(reg | I40E_PFGEN_CTRL_PFSWR_MASK));
@ -1389,6 +1391,12 @@ enum i40e_status_code i40e_pf_reset(struct i40e_hw *hw)
reg = rd32(hw, I40E_PFGEN_CTRL);
if (!(reg & I40E_PFGEN_CTRL_PFSWR_MASK))
break;
reg2 = rd32(hw, I40E_GLGEN_RSTAT);
if (reg2 & I40E_GLGEN_RSTAT_DEVSTATE_MASK) {
DEBUGOUT("Core reset upcoming.\n");
DEBUGOUT1("I40E_GLGEN_RSTAT = 0x%x\n", reg2);
return I40E_ERR_NOT_READY;
}
i40e_msec_delay(1);
}
if (reg & I40E_PFGEN_CTRL_PFSWR_MASK) {