diff options
Diffstat (limited to 'target/linux/kirkwood/patches-3.10/0018-pci-mvebu-allow-the-enumeration-of-devices-beyond-ph.patch')
| -rw-r--r-- | target/linux/kirkwood/patches-3.10/0018-pci-mvebu-allow-the-enumeration-of-devices-beyond-ph.patch | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/target/linux/kirkwood/patches-3.10/0018-pci-mvebu-allow-the-enumeration-of-devices-beyond-ph.patch b/target/linux/kirkwood/patches-3.10/0018-pci-mvebu-allow-the-enumeration-of-devices-beyond-ph.patch deleted file mode 100644 index 9274ba6dde..0000000000 --- a/target/linux/kirkwood/patches-3.10/0018-pci-mvebu-allow-the-enumeration-of-devices-beyond-ph.patch +++ /dev/null @@ -1,97 +0,0 @@ -From ce12bfd48e93b98717a258b8181aed0e19933e1e Mon Sep 17 00:00:00 2001 -From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> -Date: Thu, 23 May 2013 16:32:52 +0200 -Subject: [PATCH 18/29] pci: mvebu: allow the enumeration of devices beyond - physical bridges - -Until now, the Marvell PCIe driver was only allowing the enumeration -of the devices in the secondary bus of the emulated PCI-to-PCI -bridge. This works fine when a PCIe device is directly connected into -a PCIe slot of the Marvell board. - -However, when the device connected in the PCIe slot is a physical PCIe -bridge, beyond which a real PCIe device is connected, it no longer -worked, as the driver was preventing the Linux PCI core from seeing -such devices. - -This commit fixes that by ensuring that configuration transactions on -subordinate busses are properly forwarded on the right PCIe interface. - -Thanks to this patch, a PCIe card beyond a PCIe bridge, itself beyond -the emulated PCI-to-PCI bridge is properly detected, with the -following layout: - --[0000:00]-+-01.0-[01]----00.0 - +-09.0-[02-07]----00.0-[03-07]--+-01.0-[04]-- - | +-05.0-[05]-- - | +-07.0-[06]-- - | \-09.0-[07]----00.0 - \-0a.0-[08]----00.0 - -Where the PCIe interface that sits beyond the emulated PCI-to-PCI -bridge at 09.0 allows to access the secondary bus 02, on which there -is a PCIe bridge that allows to access the 3 to 7 busses, that are -subordinates to this bridge. And on one of this bus (bus 7), there is -one real PCIe device connected. - -Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> -Acked-by: Bjorn Helgaas <bhelgaas@google.com> -Signed-off-by: Jason Cooper <jason@lakedaemon.net> ---- - drivers/pci/host/pci-mvebu.c | 31 ++++++++++++++++++++++++++++--- - 1 file changed, 28 insertions(+), 3 deletions(-) - ---- a/drivers/pci/host/pci-mvebu.c -+++ b/drivers/pci/host/pci-mvebu.c -@@ -554,7 +554,8 @@ mvebu_pcie_find_port(struct mvebu_pcie * - if (bus->number == 0 && port->devfn == devfn) - return port; - if (bus->number != 0 && -- port->bridge.secondary_bus == bus->number) -+ bus->number >= port->bridge.secondary_bus && -+ bus->number <= port->bridge.subordinate_bus) - return port; - } - -@@ -578,7 +579,18 @@ static int mvebu_pcie_wr_conf(struct pci - if (bus->number == 0) - return mvebu_sw_pci_bridge_write(port, where, size, val); - -- if (!port->haslink || PCI_SLOT(devfn) != 0) -+ if (!port->haslink) -+ return PCIBIOS_DEVICE_NOT_FOUND; -+ -+ /* -+ * On the secondary bus, we don't want to expose any other -+ * device than the device physically connected in the PCIe -+ * slot, visible in slot 0. In slot 1, there's a special -+ * Marvell device that only makes sense when the Armada is -+ * used as a PCIe endpoint. -+ */ -+ if (bus->number == port->bridge.secondary_bus && -+ PCI_SLOT(devfn) != 0) - return PCIBIOS_DEVICE_NOT_FOUND; - - /* Access the real PCIe interface */ -@@ -609,7 +621,20 @@ static int mvebu_pcie_rd_conf(struct pci - if (bus->number == 0) - return mvebu_sw_pci_bridge_read(port, where, size, val); - -- if (!port->haslink || PCI_SLOT(devfn) != 0) { -+ if (!port->haslink) { -+ *val = 0xffffffff; -+ return PCIBIOS_DEVICE_NOT_FOUND; -+ } -+ -+ /* -+ * On the secondary bus, we don't want to expose any other -+ * device than the device physically connected in the PCIe -+ * slot, visible in slot 0. In slot 1, there's a special -+ * Marvell device that only makes sense when the Armada is -+ * used as a PCIe endpoint. -+ */ -+ if (bus->number == port->bridge.secondary_bus && -+ PCI_SLOT(devfn) != 0) { - *val = 0xffffffff; - return PCIBIOS_DEVICE_NOT_FOUND; - } |