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authorYijing Wang <wangyijing@huawei.com>2014-10-27 15:48:40 +0800
committerBjorn Helgaas <bhelgaas@google.com>2014-11-21 09:32:29 -0700
commit49dcc01a9ff2df5fafe50777bec0591c0a588d27 (patch)
treee5db4bf85123ef21c56cc0adc44ba7c3617c7971 /arch/arm/kernel/bios32.c
parent262a2baf9e4a2fcedb6645ca98d77a1c12303a1d (diff)
ARM/PCI: Save MSI controller in pci_sys_data
Currently ARM associates an MSI controller with a PCI bus by defining pcibios_add_bus() and using it to call a struct hw_pci.add_bus() method. That method sets the struct pci_bus "msi" member. That's unwieldy and unnecessarily couples MSI with the PCI enumeration code. On ARM, all devices under the same PCI host bridge share an MSI controller, so add an msi_controller pointer to the struct pci_sys_data and implement pcibios_msi_controller() to retrieve it. This is a step toward moving the msi_controller pointer into the generic struct pci_host_bridge. [bhelgaas: changelog, take pci_dev instead of pci_bus] Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'arch/arm/kernel/bios32.c')
-rw-r--r--arch/arm/kernel/bios32.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 17a26c17f7f5..ff2be3a22e1d 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -18,6 +18,15 @@
static int debug_pci;
+#ifdef CONFIG_PCI_MSI
+struct msi_controller *pcibios_msi_controller(struct pci_dev *dev)
+{
+ struct pci_sys_data *sysdata = dev->bus->sysdata;
+
+ return sysdata->msi_ctrl;
+}
+#endif
+
/*
* We can't use pci_get_device() here since we are
* called from interrupt context.
@@ -471,6 +480,9 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
#ifdef CONFIG_PCI_DOMAINS
sys->domain = hw->domain;
#endif
+#ifdef CONFIG_PCI_MSI
+ sys->msi_ctrl = hw->msi_ctrl;
+#endif
sys->busnr = busnr;
sys->swizzle = hw->swizzle;
sys->map_irq = hw->map_irq;