[PATCH v4 13/17] net/i40e/base: avoid reset timeout issue
From: Jingjing Wu <hidden>
Date: 2017-06-27 14:06:44
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted> --- 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