[core-for-CI PATCH] Revert "e1000e: move force SMBUS near the end of enable_ulp function"

[Saarinen, Jani]

Hi,
> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of
> Saarinen, Jani
> Sent: Monday, 10 June 2024 11.23
> To: Borah, Chaitanya Kumar <chaitanya.kumar.borah at intel.com>; intel-
> gfx at lists.freedesktop.org
> Cc: Borah, Chaitanya Kumar <chaitanya.kumar.borah at intel.com>
> Subject: RE: [core-for-CI PATCH] Revert "e1000e: move force SMBUS near the
> end of enable_ulp function"
> 
> Hi,
> > -----Original Message-----
> > From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of
> > Chaitanya Kumar Borah
> > Sent: Monday, 10 June 2024 10.46
> > To: intel-gfx at lists.freedesktop.org
> > Cc: Borah, Chaitanya Kumar <chaitanya.kumar.borah at intel.com>
> > Subject: [core-for-CI PATCH] Revert "e1000e: move force SMBUS near the
> > end of enable_ulp function"
> >
> > This reverts commit bfd546a552e140b0a4c8a21527c39d6d21addb28.
> >
> > The commit seems to cause problems in suspend-resume tests
> >
> > [212.204897] e1000e 0000:00:1f.6: PM: pci_pm_suspend():
> > e1000e_pm_suspend [e1000e] returns -2 [212.204928] e1000e
> 0000:00:1f.6:
> > PM: dpm_run_callback(): pci_pm_suspend returns -2 [212.204943] e1000e
> > 0000:00:1f.6: PM: failed to suspend async: error -2 [212.205092] PM:
> > suspend of devices aborted after 302.254 msecs
> >
> > References:
> > https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_14904/shard-
> > dg2-4/igt at gem_ccs@suspend-resume at linear-compressed-compfmt0-
> > lmem0-lmem0.html
> > References:
> > https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11305
> > Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>
> 
> Acked-By: Jani Saarinen <jani.saarinen at intel.com>
> 
> We have already trybot results from revert
> https://patchwork.freedesktop.org/series/134603/#rev2 / https://intel-gfx-
> ci.01.org/tree/drm-tip/Trybot_134603v2/index.html?testfilter=suspend
> So helps on these. Let's get this merged asap.
When merging please reference https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11308 

Br,
Jani

> 
> Br,
> Jani
> 
> > ---
> >  drivers/net/ethernet/intel/e1000e/ich8lan.c | 22
> > --------------------- drivers/net/ethernet/intel/e1000e/netdev.c  | 18
> > +++++++++++++++++
> >  2 files changed, 18 insertions(+), 22 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c
> > b/drivers/net/ethernet/intel/e1000e/ich8lan.c
> > index 2e98a2a0bead..f9e94be36e97 100644
> > --- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
> > +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
> > @@ -1225,28 +1225,6 @@ s32 e1000_enable_ulp_lpt_lp(struct e1000_hw
> > *hw, bool to_sx)
> >  	}
> >
> >  release:
> > -	/* Switching PHY interface always returns MDI error
> > -	 * so disable retry mechanism to avoid wasting time
> > -	 */
> > -	e1000e_disable_phy_retry(hw);
> > -
> > -	/* Force SMBus mode in PHY */
> > -	ret_val = e1000_read_phy_reg_hv_locked(hw, CV_SMB_CTRL,
> > &phy_reg);
> > -	if (ret_val) {
> > -		e1000e_enable_phy_retry(hw);
> > -		hw->phy.ops.release(hw);
> > -		goto out;
> > -	}
> > -	phy_reg |= CV_SMB_CTRL_FORCE_SMBUS;
> > -	e1000_write_phy_reg_hv_locked(hw, CV_SMB_CTRL, phy_reg);
> > -
> > -	e1000e_enable_phy_retry(hw);
> > -
> > -	/* Force SMBus mode in MAC */
> > -	mac_reg = er32(CTRL_EXT);
> > -	mac_reg |= E1000_CTRL_EXT_FORCE_SMBUS;
> > -	ew32(CTRL_EXT, mac_reg);
> > -
> >  	hw->phy.ops.release(hw);
> >  out:
> >  	if (ret_val)
> > diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c
> > b/drivers/net/ethernet/intel/e1000e/netdev.c
> > index da5c59daf8ba..220d62fca55d 100644
> > --- a/drivers/net/ethernet/intel/e1000e/netdev.c
> > +++ b/drivers/net/ethernet/intel/e1000e/netdev.c
> > @@ -6623,6 +6623,7 @@ static int __e1000_shutdown(struct pci_dev
> > *pdev, bool runtime)
> >  	struct e1000_hw *hw = &adapter->hw;
> >  	u32 ctrl, ctrl_ext, rctl, status, wufc;
> >  	int retval = 0;
> > +	u16 smb_ctrl;
> >
> >  	/* Runtime suspend should only enable wakeup for link changes */
> >  	if (runtime)
> > @@ -6696,6 +6697,23 @@ static int __e1000_shutdown(struct pci_dev
> > *pdev, bool runtime)
> >  			if (retval)
> >  				return retval;
> >  		}
> > +
> > +		/* Force SMBUS to allow WOL */
> > +		/* Switching PHY interface always returns MDI error
> > +		 * so disable retry mechanism to avoid wasting time
> > +		 */
> > +		e1000e_disable_phy_retry(hw);
> > +
> > +		e1e_rphy(hw, CV_SMB_CTRL, &smb_ctrl);
> > +		smb_ctrl |= CV_SMB_CTRL_FORCE_SMBUS;
> > +		e1e_wphy(hw, CV_SMB_CTRL, smb_ctrl);
> > +
> > +		e1000e_enable_phy_retry(hw);
> > +
> > +		/* Force SMBus mode in MAC */
> > +		ctrl_ext = er32(CTRL_EXT);
> > +		ctrl_ext |= E1000_CTRL_EXT_FORCE_SMBUS;
> > +		ew32(CTRL_EXT, ctrl_ext);
> >  	}
> >
> >  	/* Ensure that the appropriate bits are set in LPI_CTRL
> > --
> > 2.25.1