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authorMurali Karicheri <m-karicheri2@ti.com>2014-05-28 21:14:53 +0400
committerBjorn Helgaas <bhelgaas@google.com>2014-05-30 20:50:57 +0400
commit8b5742ad156d30ee38486652cdbd152e2d6ebbcc (patch)
treed83ae4569083f96b35ba53056f566715ae548f60
parentc893d133eaccdda2516a3e71cd05a7dac2e14b00 (diff)
downloadlinux-8b5742ad156d30ee38486652cdbd152e2d6ebbcc.tar.xz
ARM/PCI: Call pcie_bus_configure_settings() to set MPS
Call pcie_bus_configure_settings() on ARM, like for other platforms. pcie_bus_configure_settings() makes sure the MPS across the bus is uniform and provides the ability to tune the MRSS and MPS to higher performance values. This is particularly important for embedded where there is no firmware to program these PCIe settings for the OS. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: Russell King <linux@arm.linux.org.uk> CC: Arnd Bergmann <arnd@arndb.de> CC: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> CC: Santosh Shilimkar <santosh.shilimkar@ti.com>
-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 16d43cd45619..17a26c17f7f5 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -545,6 +545,18 @@ void pci_common_init_dev(struct device *parent, struct hw_pci *hw)
*/
pci_bus_add_devices(bus);
}
+
+ list_for_each_entry(sys, &head, node) {
+ struct pci_bus *bus = sys->bus;
+
+ /* Configure PCI Express settings */
+ if (bus && !pci_has_flag(PCI_PROBE_ONLY)) {
+ struct pci_bus *child;
+
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+ }
+ }
}
#ifndef CONFIG_PCI_HOST_ITE8152