[dpdk-dev] [PATCH v4 13/17] net/i40e/base: avoid reset timeout issue
Jingjing Wu
jingjing.wu at intel.com
Tue Jun 27 16:00:52 CEST 2017
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 at intel.com>
---
drivers/net/i40e/base/i40e_common.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/i40e/base/i40e_common.c b/drivers/net/i40e/base/i40e_common.c
index 78ed2a8..ed2e01a 100644
--- a/drivers/net/i40e/base/i40e_common.c
+++ b/drivers/net/i40e/base/i40e_common.c
@@ -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) {
--
2.4.11
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