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ARM/PCI, designware, xilinx: Use pci_scan_root_bus_msi() 

ARM previously stored the msi_controller pointer in its sysdata, struct
pci_sys_data, and implemented pcibios_msi_controller() to retrieve it.
That made PCI host controller drivers specific to ARM because they had to
put the msi_controller pointer in the ARM-specific pci_sys_data.

There is now a generic mechanism, pci_scan_root_bus_msi(), for giving the
msi_controller pointer to the PCI core.  Use this for all ARM systems and
for the DesignWare and Xilinx PCI host controller drivers.

This removes an ARM dependency from the DesignWare, DRA7xx, EXYNOS, i.MX6,
Keystone, Layerscape, SPEAr13xx, and Xilinx drivers.

[bhelgaas: changelog, split into separate patch]
Suggested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
CC: Pratyush Anand <pratyush.anand@gmail.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Simon Horman <horms@verge.net.au>
CC: Russell King <linux@arm.linux.org.uk>
CC: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: Michal Simek <michal.simek@xilinx.com>
CC: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Lorenzo Pieralisi 2015-07-29 12:33:18 +01:00 committed by Bjorn Helgaas
parent d2a7926d42
commit 8953aab1e8
4 changed files with 20 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/include/asm/mach/pci.h
View File

@ -19,9 +19,7 @@ struct pci_bus;
struct device;
struct hw_pci {
#ifdef CONFIG_PCI_MSI
struct msi_controller *msi_ctrl;
#endif
struct pci_ops *ops;
int nr_controllers;
void **private_data;

5
arch/arm/kernel/bios32.c
View File

@ -486,8 +486,9 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
if (hw->scan)
sys->bus = hw->scan(nr, sys);
else
sys->bus = pci_scan_root_bus(parent, sys->busnr,
hw->ops, sys, &sys->resources);
sys->bus = pci_scan_root_bus_msi(parent,
sys->busnr, hw->ops, sys,
&sys->resources, hw->msi_ctrl);
if (WARN(!sys->bus, "PCI: unable to scan bus!")) {
kfree(sys);

12
drivers/pci/host/pcie-designware.c
View File

@ -526,7 +526,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
#ifdef CONFIG_PCI_MSI
dw_pcie_msi_chip.dev = pp->dev;
dw_pci.msi_ctrl = &dw_pcie_msi_chip;
#endif
dw_pci.nr_controllers = 1;
@ -708,8 +707,15 @@ static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
struct pcie_port *pp = sys_to_pcie(sys);
pp->root_bus_nr = sys->busnr;
bus = pci_scan_root_bus(pp->dev, sys->busnr,
&dw_pcie_ops, sys, &sys->resources);
if (IS_ENABLED(CONFIG_PCI_MSI))
bus = pci_scan_root_bus_msi(pp->dev, sys->busnr, &dw_pcie_ops,
sys, &sys->resources,
&dw_pcie_msi_chip);
else
bus = pci_scan_root_bus(pp->dev, sys->busnr, &dw_pcie_ops,
sys, &sys->resources);
if (!bus)
return NULL;

11
drivers/pci/host/pcie-xilinx.c
View File

@ -647,9 +647,15 @@ static struct pci_bus *xilinx_pcie_scan_bus(int nr, struct pci_sys_data *sys)
struct pci_bus *bus;
port->root_busno = sys->busnr;
bus = pci_scan_root_bus(port->dev, sys->busnr, &xilinx_pcie_ops,
sys, &sys->resources);
if (IS_ENABLED(CONFIG_PCI_MSI))
bus = pci_scan_root_bus_msi(port->dev, sys->busnr,
&xilinx_pcie_ops, sys,
&sys->resources,
&xilinx_pcie_msi_chip);
else
bus = pci_scan_root_bus(port->dev, sys->busnr,
&xilinx_pcie_ops, sys, &sys->resources);
return bus;
}
@ -847,7 +853,6 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
#ifdef CONFIG_PCI_MSI
xilinx_pcie_msi_chip.dev = port->dev;
hw.msi_ctrl = &xilinx_pcie_msi_chip;
#endif
pci_common_init_dev(dev, &hw);