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Message-ID: <194528a1-1789-b31c-c7ec-aff55d7c259d@intel.com> Date: Tue, 30 May 2023 17:11:46 +0200 From: "Buchocki, JakubX" <jakubx.buchocki@...el.com> To: Jiri Pirko <jiri@...nulli.us>, Tony Nguyen <anthony.l.nguyen@...el.com> CC: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>, <edumazet@...gle.com>, <netdev@...r.kernel.org>, Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>, Arpana Arland <arpanax.arland@...el.com>, <przemyslaw.kitszel@...el.com> Subject: Re: [PATCH net] ice: Fix ice module unload On 5/24/2023 1:45 PM, Jiri Pirko wrote: > Tue, May 23, 2023 at 07:30:33PM CEST, anthony.l.nguyen@...el.com wrote: >> From: Jakub Buchocki <jakubx.buchocki@...el.com> >> >> Clearing interrupt scheme before PFR reset, during the removal routine, >> could cause the hardware errors and possibly lead to system reboot, as >> the PF reset can cause the interrupt to be generated. >> Move clearing interrupt scheme from device deinitialization subprocedure, >> and call it directly in particular routines. In ice_remove(), call the >> ice_clear_interrupt_scheme() after the PFR is complete and all pending >> transactions are done. >> >> Error example: >> [ 75.229328] ice 0000:ca:00.1: Failed to read Tx Scheduler Tree - User Selection data from flash >> [ 77.571315] {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 1 >> [ 77.571418] {1}[Hardware Error]: event severity: recoverable >> [ 77.571459] {1}[Hardware Error]: Error 0, type: recoverable >> [ 77.571500] {1}[Hardware Error]: section_type: PCIe error >> [ 77.571540] {1}[Hardware Error]: port_type: 4, root port >> [ 77.571580] {1}[Hardware Error]: version: 3.0 >> [ 77.571615] {1}[Hardware Error]: command: 0x0547, status: 0x4010 >> [ 77.571661] {1}[Hardware Error]: device_id: 0000:c9:02.0 >> [ 77.571703] {1}[Hardware Error]: slot: 25 >> [ 77.571736] {1}[Hardware Error]: secondary_bus: 0xca >> [ 77.571773] {1}[Hardware Error]: vendor_id: 0x8086, device_id: 0x347a >> [ 77.571821] {1}[Hardware Error]: class_code: 060400 >> [ 77.571858] {1}[Hardware Error]: bridge: secondary_status: 0x2800, control: 0x0013 >> [ 77.572490] pcieport 0000:c9:02.0: AER: aer_status: 0x00200000, aer_mask: 0x00100020 >> [ 77.572870] pcieport 0000:c9:02.0: [21] ACSViol (First) >> [ 77.573222] pcieport 0000:c9:02.0: AER: aer_layer=Transaction Layer, aer_agent=Receiver ID >> [ 77.573554] pcieport 0000:c9:02.0: AER: aer_uncor_severity: 0x00463010 >> [ 77.691273] {2}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 1 >> [ 77.691738] {2}[Hardware Error]: event severity: recoverable >> [ 77.691971] {2}[Hardware Error]: Error 0, type: recoverable >> [ 77.692192] {2}[Hardware Error]: section_type: PCIe error >> [ 77.692403] {2}[Hardware Error]: port_type: 4, root port >> [ 77.692616] {2}[Hardware Error]: version: 3.0 >> [ 77.692825] {2}[Hardware Error]: command: 0x0547, status: 0x4010 >> [ 77.693032] {2}[Hardware Error]: device_id: 0000:c9:02.0 >> [ 77.693238] {2}[Hardware Error]: slot: 25 >> [ 77.693440] {2}[Hardware Error]: secondary_bus: 0xca >> [ 77.693641] {2}[Hardware Error]: vendor_id: 0x8086, device_id: 0x347a >> [ 77.693853] {2}[Hardware Error]: class_code: 060400 >> [ 77.694054] {2}[Hardware Error]: bridge: secondary_status: 0x0800, control: 0x0013 >> [ 77.719115] pci 0000:ca:00.1: AER: can't recover (no error_detected callback) >> [ 77.719140] pcieport 0000:c9:02.0: AER: device recovery failed >> [ 77.719216] pcieport 0000:c9:02.0: AER: aer_status: 0x00200000, aer_mask: 0x00100020 >> [ 77.719390] pcieport 0000:c9:02.0: [21] ACSViol (First) >> [ 77.719557] pcieport 0000:c9:02.0: AER: aer_layer=Transaction Layer, aer_agent=Receiver ID >> [ 77.719723] pcieport 0000:c9:02.0: AER: aer_uncor_severity: 0x00463010 >> >> Fixes: 5b246e533d01 ("ice: split probe into smaller functions") >> Signed-off-by: Jakub Buchocki <jakubx.buchocki@...el.com> >> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com> >> Tested-by: Arpana Arland <arpanax.arland@...el.com> (A Contingent worker at Intel) >> Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com> >> --- >> drivers/net/ethernet/intel/ice/ice_main.c | 7 ++++++- >> 1 file changed, 6 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c >> index a1f7c8edc22f..5052250b147e 100644 >> --- a/drivers/net/ethernet/intel/ice/ice_main.c >> +++ b/drivers/net/ethernet/intel/ice/ice_main.c >> @@ -4802,7 +4802,6 @@ static int ice_init_dev(struct ice_pf *pf) >> static void ice_deinit_dev(struct ice_pf *pf) >> { >> ice_free_irq_msix_misc(pf); >> - ice_clear_interrupt_scheme(pf); >> ice_deinit_pf(pf); >> ice_deinit_hw(&pf->hw); >> } >> @@ -5071,6 +5070,7 @@ static int ice_init(struct ice_pf *pf) >> ice_dealloc_vsis(pf); >> err_alloc_vsis: >> ice_deinit_dev(pf); >> + ice_clear_interrupt_scheme(pf); > > Can't you maintain the same order of calling > ice_clear_interrupt_scheme() and ice_deinit_pf()? > Sorry, for the delayed response. We tried to maintain the same order and move the PFR reset and pci_wait_for_pending_transaction() to ice_deinit_dev(). The code looked cleaner but it made the unloading process much longer (~6s/PF). At this point, to keep the order of calls we would have to break the ice_deinit_dev() back to individual calls and it doesn't seem to be that beneficial. >> return err; >> } >> >> @@ -5098,6 +5098,8 @@ int ice_load(struct ice_pf *pf) >> if (err) >> return err; > > Don't you need pci_wait_for_pending_transaction() here as well? > > Btw, why can't you do reset in ice_unload to follow the same patterns as > probe/remove? > > This patch was limited to the changes required to fix the issue, targeted for net. Your ask is accurate and it might be a good change, but I would prefer to work on it in another series (for net-next), so it can be properly tested. >> >> + ice_clear_interrupt_scheme(pf); >> + >> err = ice_init_dev(pf); >> if (err) >> return err; >> @@ -5132,6 +5134,7 @@ int ice_load(struct ice_pf *pf) >> ice_vsi_decfg(ice_get_main_vsi(pf)); >> err_vsi_cfg: >> ice_deinit_dev(pf); >> + ice_clear_interrupt_scheme(pf); >> return err; >> } >> >> @@ -5251,6 +5254,7 @@ ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent) >> ice_deinit_eth(pf); >> err_init_eth: >> ice_deinit(pf); >> + ice_clear_interrupt_scheme(pf); >> err_init: >> pci_disable_device(pdev); >> return err; >> @@ -5360,6 +5364,7 @@ static void ice_remove(struct pci_dev *pdev) >> */ >> ice_reset(&pf->hw, ICE_RESET_PFR); >> pci_wait_for_pending_transaction(pdev); >> + ice_clear_interrupt_scheme(pf); >> pci_disable_device(pdev); >> } >> >> -- >> 2.38.1 >> >>
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