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| author |   Suganath Prabu S <suganath-prabu.subramani@broadcom.com> | 2019-05-31 08:14:41 -0400 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2019-06-18 19:46:26 -0400 |
| commit | 2426f20903ff4ee83cef585b2130ed45adc865d8 (patch) | |
| tree | 1bf68bde155877e3014cbbcc0812ad14ac9ba80f /drivers/scsi/mpt3sas/mpt3sas_scsih.c | |
| parent | scsi: mpt3sas: Affinity high iops queues IRQs to local node (diff) | |
| download | linux-dev-2426f20903ff4ee83cef585b2130ed45adc865d8.tar.xz linux-dev-2426f20903ff4ee83cef585b2130ed45adc865d8.zip | |
scsi: mpt3sas: Enable interrupt coalescing on high iops
Enable interrupt coalescing only on high iops queues.
In ioc config page 1, offset 0x14 (ProductSpecific field) is used to
determine interrupt coalescing enabled/disabled on per reply descriptor
post queue group(8) basis. If 31st bit is zero, then interrupt coalescing
is enabled for all reply descriptor post queues. If 31st bit is set to one,
then user can enable/disable interrupt coalescing on per reply descriptor
post queue group(8) basis. So to enable interrupt coalescing only on first
reply descriptor post queue group (i.e. on high iops queues), set bit 0 and
31.
This configuration should reset during driver unload or shutdown to the
default settings. For this, the driver takes copy of default ioc page 1 and
copies back the default or unmodified ioc page1 during unload and
shutdown. This means that on next driver load (e.g. if older version driver
is loaded by user), current modified changes on ioc page1 won't take
effect.
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_scsih.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index 3e93c4ab841b..1f6aa8b19a4d 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -9671,6 +9671,7 @@ static void scsih_remove(struct pci_dev *pdev) struct _pcie_device *pcie_device, *pcienext; struct workqueue_struct *wq; unsigned long flags; + Mpi2ConfigReply_t mpi_reply; ioc->remove_host = 1; @@ -9685,7 +9686,13 @@ static void scsih_remove(struct pci_dev *pdev) spin_unlock_irqrestore(&ioc->fw_event_lock, flags); if (wq) destroy_workqueue(wq); - + /* + * Copy back the unmodified ioc page1. so that on next driver load, + * current modified changes on ioc page1 won't take effect. + */ + if (ioc->is_aero_ioc) + mpt3sas_config_set_ioc_pg1(ioc, &mpi_reply, + &ioc->ioc_pg1_copy); /* release all the volumes */ _scsih_ir_shutdown(ioc); sas_remove_host(shost); @@ -9748,6 +9755,7 @@ scsih_shutdown(struct pci_dev *pdev) struct MPT3SAS_ADAPTER *ioc = shost_priv(shost); struct workqueue_struct *wq; unsigned long flags; + Mpi2ConfigReply_t mpi_reply; ioc->remove_host = 1; @@ -9762,6 +9770,13 @@ scsih_shutdown(struct pci_dev *pdev) spin_unlock_irqrestore(&ioc->fw_event_lock, flags); if (wq) destroy_workqueue(wq); + /* + * Copy back the unmodified ioc page1 so that on next driver load, + * current modified changes on ioc page1 won't take effect. + */ + if (ioc->is_aero_ioc) + mpt3sas_config_set_ioc_pg1(ioc, &mpi_reply, + &ioc->ioc_pg1_copy); _scsih_ir_shutdown(ioc); mpt3sas_base_detach(ioc); |