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| author | Marc Zyngier <marc.zyngier@arm.com> | 2015-10-02 15:43:06 +0200 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-10-16 14:07:16 +0200 |
| commit | 54fa97eeb9e22b47d68b67ee00987afa7fbc2178 (patch) | |
| tree | bf5cbab9a60df9291dcc92592f21a1c52cc593ee /drivers/pci/probe.c | |
| parent | PCI: Add per-device MSI domain hook (diff) | |
| download | linux-54fa97eeb9e22b47d68b67ee00987afa7fbc2178.tar.xz linux-54fa97eeb9e22b47d68b67ee00987afa7fbc2178.zip | |
PCI/MSI: Allow the MSI domain to be device-specific
So far, we've always considered that for a given PCI device, its
MSI controller was either set by the architecture-specific
pcibios hook, or simply inherited from the host bridge.
This doesn't cover things like firmware-defined topologies like
msi-map (DT) or IORT (ACPI), which can provide information about
which MSI controller to use on a per-device basis.
This patch adds the necessary hook into the MSI code to allow this
feature, and provides the msi-map functionnality as a first
implementation.
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 7c333f8c2327..f14a970b61fa 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1639,6 +1639,14 @@ static struct irq_domain *pci_dev_msi_domain(struct pci_dev *dev) if (d) return d; + /* + * Let's see if we have a firmware interface able to provide + * the domain. + */ + d = pci_msi_get_device_domain(dev); + if (d) + return d; + return NULL; } |