diff options
| author |   Jens Axboe <axboe@kernel.dk> | 2018-11-02 22:59:51 +0800 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2018-11-05 12:16:27 +0100 |
| commit | 6da4b3ab9a6e9b1b5f90322ab3fa3a7dd18edb19 (patch) | |
| tree | 36ce19a44fb7ac5ff3308a6457e17835444041b3 /drivers/pci | |
| parent | genirq/affinity: Pass first vector to __irq_build_affinity_masks() (diff) | |
| download | linux-dev-6da4b3ab9a6e9b1b5f90322ab3fa3a7dd18edb19.tar.xz linux-dev-6da4b3ab9a6e9b1b5f90322ab3fa3a7dd18edb19.zip | |
genirq/affinity: Add support for allocating interrupt sets
A driver may have a need to allocate multiple sets of MSI/MSI-X interrupts,
and have them appropriately affinitized.
Add support for defining a number of sets in the irq_affinity structure, of
varying sizes, and get each set affinitized correctly across the machine.
[ tglx: Minor changelog tweaks ]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Cc: linux-block@vger.kernel.org
Link: https://lkml.kernel.org/r/20181102145951.31979-5-ming.lei@redhat.com
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/msi.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index af24ed50a245..265ed3e4c920 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -1036,6 +1036,13 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, if (maxvec < minvec) return -ERANGE; + /* + * If the caller is passing in sets, we can't support a range of + * vectors. The caller needs to handle that. + */ + if (affd && affd->nr_sets && minvec != maxvec) + return -EINVAL; + if (WARN_ON_ONCE(dev->msi_enabled)) return -EINVAL; @@ -1087,6 +1094,13 @@ static int __pci_enable_msix_range(struct pci_dev *dev, if (maxvec < minvec) return -ERANGE; + /* + * If the caller is passing in sets, we can't support a range of + * supported vectors. The caller needs to handle that. + */ + if (affd && affd->nr_sets && minvec != maxvec) + return -EINVAL; + if (WARN_ON_ONCE(dev->msix_enabled)) return -EINVAL; |