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author | Marc Zyngier <marc.zyngier@arm.com> | 2015-07-28 14:46:11 +0100 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2015-07-30 00:14:37 +0200 |
commit | 44aa0c657e3e45795a92addeb0dce7d28d9b0bd2 (patch) | |
tree | c47869173558e416c03d03698a868ac1969a5e9d | |
parent | f1421db8ca4c110144be97a5997ed83d34685db5 (diff) | |
download | linux-stable-44aa0c657e3e45795a92addeb0dce7d28d9b0bd2.tar.gz linux-stable-44aa0c657e3e45795a92addeb0dce7d28d9b0bd2.tar.bz2 linux-stable-44aa0c657e3e45795a92addeb0dce7d28d9b0bd2.zip |
PCI/MSI: Add hooks to populate the msi_domain field
In order to be able to populate the device msi_domain field,
add the necessary hooks to propagate the host bridge msi_domain
across secondary busses to devices.
So far, nobody populates the initial msi_domain.
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Ma Jun <majun258@huawei.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Duc Dang <dhdang@apm.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1438091186-10244-5-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r-- | drivers/pci/probe.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index cefd636681b6..c03ecbffc50b 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -661,6 +661,32 @@ static void pci_set_bus_speed(struct pci_bus *bus) } } +static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus) +{ + /* + * Any firmware interface that can resolve the msi_domain + * should be called from here. + */ + + return NULL; +} + +static void pci_set_bus_msi_domain(struct pci_bus *bus) +{ + struct irq_domain *d; + + /* + * Either bus is the root, and we must obtain it from the + * firmware, or we inherit it from the bridge device. + */ + if (pci_is_root_bus(bus)) + d = pci_host_bridge_msi_domain(bus); + else + d = dev_get_msi_domain(&bus->self->dev); + + dev_set_msi_domain(&bus->dev, d); +} + static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, struct pci_dev *bridge, int busnr) { @@ -714,6 +740,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, bridge->subordinate = child; add_dev: + pci_set_bus_msi_domain(child); ret = device_register(&child->dev); WARN_ON(ret < 0); @@ -1544,6 +1571,17 @@ static void pci_init_capabilities(struct pci_dev *dev) pci_enable_acs(dev); } +static void pci_set_msi_domain(struct pci_dev *dev) +{ + /* + * If no domain has been set through the pcibios_add_device + * callback, inherit the default from the bus device. + */ + if (!dev_get_msi_domain(&dev->dev)) + dev_set_msi_domain(&dev->dev, + dev_get_msi_domain(&dev->bus->dev)); +} + void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) { int ret; @@ -1585,6 +1623,9 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) ret = pcibios_add_device(dev); WARN_ON(ret < 0); + /* Setup MSI irq domain */ + pci_set_msi_domain(dev); + /* Notifier could use PCI capabilities */ dev->match_driver = false; ret = device_add(&dev->dev); @@ -1975,6 +2016,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, b->bridge = get_device(&bridge->dev); device_enable_async_suspend(b->bridge); pci_set_bus_of_node(b); + pci_set_bus_msi_domain(b); if (!parent) set_dev_node(b->bridge, pcibus_to_node(b)); |