> -----Original Message----- > From: Tomas Henzl [mailto:the...@redhat.com] > Sent: Tuesday, January 19, 2016 7:53 PM > To: Sumit Saxena; jbottom...@parallels.com; h...@infradead.org; > martin.peter...@oracle.com > Cc: linux-scsi@vger.kernel.org; kashyap.de...@avagotech.com > Subject: Re: [PATCH 12/15] megaraid_sas: MFI adapter's OCR changes > > On 18.12.2015 14:27, Sumit Saxena wrote: > > Optimized MFI adapters' OCR path, particularly > megasas_wait_for_outstanding() function. > > > > Signed-off-by: Kashyap Desai <kashyap.de...@avagotech.com> > > Signed-off-by: Sumit Saxena <sumit.sax...@avagotech.com> > > --- > > drivers/scsi/megaraid/megaraid_sas_base.c | 104 > > +++++++++++++++-------------- > > 1 files changed, 54 insertions(+), 50 deletions(-) > > > > diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c > > b/drivers/scsi/megaraid/megaraid_sas_base.c > > index 5eaf6fd..cc843d6 100644 > > --- a/drivers/scsi/megaraid/megaraid_sas_base.c > > +++ b/drivers/scsi/megaraid/megaraid_sas_base.c > > @@ -2456,15 +2456,19 @@ void megasas_sriov_heartbeat_handler(unsigned > long instance_addr) > > */ > > static int megasas_wait_for_outstanding(struct megasas_instance > > *instance) { > > - int i; > > + int i, sl, outstanding; > > u32 reset_index; > > u32 wait_time = MEGASAS_RESET_WAIT_TIME; > > unsigned long flags; > > struct list_head clist_local; > > struct megasas_cmd *reset_cmd; > > u32 fw_state; > > - u8 kill_adapter_flag; > > > > + if (atomic_read(&instance->adprecovery) == > MEGASAS_HW_CRITICAL_ERROR) { > > + dev_info(&instance->pdev->dev, "%s:%d HBA is killed.\n", > > + __func__, __LINE__); > > + return FAILED; > > + } > > > > if (atomic_read(&instance->adprecovery) != > MEGASAS_HBA_OPERATIONAL) > > { > > > > @@ -2521,7 +2525,7 @@ static int megasas_wait_for_outstanding(struct > megasas_instance *instance) > > } > > > > for (i = 0; i < resetwaittime; i++) { > > - int outstanding = atomic_read(&instance->fw_outstanding); > > + outstanding = atomic_read(&instance->fw_outstanding); > > > > if (!outstanding) > > break; > > @@ -2540,65 +2544,65 @@ static int megasas_wait_for_outstanding(struct > megasas_instance *instance) > > } > > > > i = 0; > > - kill_adapter_flag = 0; > > + outstanding = atomic_read(&instance->fw_outstanding); > > + fw_state = > > +instance->instancet->read_fw_status_reg(instance->reg_set) & > > +MFI_STATE_MASK; > > + > > + if ((!outstanding && (fw_state == MFI_STATE_OPERATIONAL))) > > + goto no_outstanding; > > + > > + if (instance->disableOnlineCtrlReset) > > + goto kill_hba_and_failed; > > do { > > - fw_state = instance->instancet->read_fw_status_reg( > > - instance->reg_set) & > MFI_STATE_MASK; > > - if ((fw_state == MFI_STATE_FAULT) && > > - (instance->disableOnlineCtrlReset == 0)) { > > - if (i == 3) { > > - kill_adapter_flag = 2; > > - break; > > - } > > + if ((fw_state == MFI_STATE_FAULT) || atomic_read(&instance- > >fw_outstanding)) { > > + dev_info(&instance->pdev->dev, > > + "%s:%d waiting_for_outstanding: before issue > OCR. FW state = 0x%x, oustanding 0x%x\n", > > + __func__, __LINE__, fw_state, > atomic_read(&instance->fw_outstanding)); > > + if (i == 3) > > + goto kill_hba_and_failed; > > megasas_do_ocr(instance); > > - kill_adapter_flag = 1; > > > > - /* wait for 1 secs to let FW finish the pending cmds */ > > - msleep(1000); > > + if (atomic_read(&instance->adprecovery) == > MEGASAS_HW_CRITICAL_ERROR) { > > + dev_info(&instance->pdev->dev, "%s:%d OCR > failed and HBA is killed.\n", > > + __func__, __LINE__); > > + return FAILED; > > + } > > + dev_info(&instance->pdev->dev, "%s:%d > waiting_for_outstanding: after issue OCR.\n", > > + __func__, __LINE__); > > + > > + for (sl = 0; sl < 10; sl++) > > + msleep(500); > > ssleep(5); ? > > > + > > + outstanding = atomic_read(&instance- > >fw_outstanding); > > + > > + fw_state = instance->instancet- > >read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK; > > + if ((!outstanding && (fw_state == > MFI_STATE_OPERATIONAL))) > > + goto no_outstanding; > > } > > i++; > > } while (i <= 3); > > > > - if (atomic_read(&instance->fw_outstanding) && !kill_adapter_flag) { > > - if (instance->disableOnlineCtrlReset == 0) { > > - megasas_do_ocr(instance); > > +no_outstanding: > > > > - /* wait for 5 secs to let FW finish the pending cmds */ > > - for (i = 0; i < wait_time; i++) { > > - int outstanding = > > - atomic_read(&instance- > >fw_outstanding); > > - if (!outstanding) > > - return SUCCESS; > > - msleep(1000); > > - } > > - } > > - } > > + dev_info(&instance->pdev->dev, "%s:%d no more pending commands > remain after reset handling.\n", > > + __func__, __LINE__); > > + return SUCCESS; > > > > - if (atomic_read(&instance->fw_outstanding) || > > - (kill_adapter_flag == 2)) { > > - dev_notice(&instance->pdev->dev, "pending cmds after > reset\n"); > > - /* > > - * Send signal to FW to stop processing any pending cmds. > > - * The controller will be taken offline by the OS now. > > - */ > > - if ((instance->pdev->device == > > - PCI_DEVICE_ID_LSI_SAS0073SKINNY) || > > - (instance->pdev->device == > > - PCI_DEVICE_ID_LSI_SAS0071SKINNY)) { > > - writel(MFI_STOP_ADP, > > - &instance->reg_set->doorbell); > > - } else { > > - writel(MFI_STOP_ADP, > > - &instance->reg_set->inbound_doorbell); > > - } > > +kill_hba_and_failed: > > + > > + fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) > & MFI_STATE_MASK; > > + if (instance->disableOnlineCtrlReset || > > + atomic_read(&instance->fw_outstanding) || > > + (fw_state == MFI_STATE_FAULT)) { > > You have tested all that many times before (fw_state etc.), so when you after all > that have arrived at kill_hba_and_failed: please just kill the HBA and return > FAILED.
Agree..will be accommodating this while resending patch. > > > + /* Reset not supported, kill adapter */ > > + dev_info(&instance->pdev->dev, "%s:%d killing adapter scsi%d" > > + " disableOnlineCtrlReset %d fw_outstanding %d \n", > > + __func__, __LINE__, instance->host->host_no, > instance->disableOnlineCtrlReset, > > + atomic_read(&instance->fw_outstanding)); > > megasas_dump_pending_frames(instance); > > - atomic_set(&instance->adprecovery, > MEGASAS_HW_CRITICAL_ERROR); > > - return FAILED; > > + megaraid_sas_kill_hba(instance); > > } > > > > - dev_notice(&instance->pdev->dev, "no pending cmds after reset\n"); > > - > > - return SUCCESS; > > + return FAILED; > > } > > > > /** -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
