diff options
| author | Mike Marciniszyn <mike.marciniszyn@intel.com> | 2013-05-30 18:25:25 -0400 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2013-06-21 17:19:38 -0700 |
| commit | 8469ba39a6b77917e8879680aed17229bf72f263 (patch) | |
| tree | f064dfaf3387f3ed5d59d69941b90825fe628729 /drivers/infiniband/hw/qib/qib_iba6120.c | |
| parent | fedaf4ffc224a194e2d13a3ec2abe5df0bc94258 (diff) | |
IB/qib: Add DCA support
This patch adds DCA cache warming for systems that support DCA.
The code uses cpu affinity notification to react to an affinity change
from a user mode program like irqbalance and (re-)program the chip
accordingly. This notification avoids reading the current cpu on every
interrupt.
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
[ Add Kconfig dependency on SMP && GENERIC_HARDIRQS to avoid failure to
build due to undefined struct irq_affinity_notify. - Roland ]
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_iba6120.c')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_iba6120.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/qib/qib_iba6120.c b/drivers/infiniband/hw/qib/qib_iba6120.c index 0232ae56b1fa..84e593d6007b 100644 --- a/drivers/infiniband/hw/qib/qib_iba6120.c +++ b/drivers/infiniband/hw/qib/qib_iba6120.c @@ -3464,6 +3464,13 @@ static int qib_6120_tempsense_rd(struct qib_devdata *dd, int regnum) return -ENXIO; } +#ifdef CONFIG_INFINIBAND_QIB_DCA +static int qib_6120_notify_dca(struct qib_devdata *dd, unsigned long event) +{ + return 0; +} +#endif + /* Dummy function, as 6120 boards never disable EEPROM Write */ static int qib_6120_eeprom_wen(struct qib_devdata *dd, int wen) { @@ -3539,6 +3546,9 @@ struct qib_devdata *qib_init_iba6120_funcs(struct pci_dev *pdev, dd->f_xgxs_reset = qib_6120_xgxs_reset; dd->f_writescratch = writescratch; dd->f_tempsense_rd = qib_6120_tempsense_rd; +#ifdef CONFIG_INFINIBAND_QIB_DCA + dd->f_notify_dca = qib_6120_notify_dca; +#endif /* * Do remaining pcie setup and save pcie values in dd. * Any error printing is already done by the init code. |