PCI Enumeration has been part of SLOF. Now with hotplug code addition in Qemu, it makes more sense to have this code a one place, i.e. Qemu.
Adding routines to walk through the device nodes created by Qemu. SLOF will configure the device/bridges and program the BARs for communicating with the devices. Signed-off-by: Nikunj A Dadhania <nik...@linux.vnet.ibm.com> --- board-qemu/slof/pci-phb.fs | 44 +++++++++++++++++++++++++++++++++++++++++++- slof/fs/pci-properties.fs | 6 +++++- 2 files changed, 48 insertions(+), 2 deletions(-) diff --git a/board-qemu/slof/pci-phb.fs b/board-qemu/slof/pci-phb.fs index e307d95..30b7443 100644 --- a/board-qemu/slof/pci-phb.fs +++ b/board-qemu/slof/pci-phb.fs @@ -283,6 +283,41 @@ setup-puid THEN ; +: phb-pci-walk-bridge ( -- ) + phb-debug? IF ." Calling pci-walk-bridge " pwd cr THEN + + get-node child ?dup 0= IF EXIT THEN \ get and check if we have children + BEGIN + dup \ Continue as long as there are children + WHILE + \ Set child node as current node: + dup set-node + my-space pci-set-slot \ set the slot bit + my-space pci-htype@ \ read HEADER-Type + 7f and \ Mask bit 7 - multifunction device + CASE + 0 OF my-space pci-device-setup ENDOF \ | set up the device + 1 OF my-space pci-bridge-setup ENDOF \ | set up the bridge + dup OF my-space pci-htype@ pci-out ENDOF + ENDCASE + peer + REPEAT drop + get-parent set-node +; + +\ Landing routing to probe the popuated device tree +: phb-pci-probe-bus ( busnr -- ) + drop phb-pci-walk-bridge +; + +\ Stub routine, as qemu has enumerated, we already have the device +\ properties set. +: phb-pci-device-props ( addr -- ) + dup pci-class-name device-name + dup pci-device-assigned-addresses-prop + drop +; + \ Scan the child nodes of the pci root node to assign bars, fixup \ properties etc. : phb-setup-children @@ -290,7 +325,14 @@ setup-puid my-puid TO puid \ Set current puid phb-parse-ranges 1 TO pci-hotplug-enabled - 1 0 (probe-pci-host-bridge) + s" qemu,phb-enumerated" get-node get-property 0<> IF + 1 0 (probe-pci-host-bridge) + ELSE + 2drop + ['] phb-pci-probe-bus TO func-pci-probe-bus + ['] phb-pci-device-props TO func-pci-device-props + phb-pci-walk-bridge \ PHB device tree is already populated. + THEN r> TO puid \ Restore previous puid ; phb-setup-children diff --git a/slof/fs/pci-properties.fs b/slof/fs/pci-properties.fs index 9efa87e..4f13402 100644 --- a/slof/fs/pci-properties.fs +++ b/slof/fs/pci-properties.fs @@ -651,6 +651,8 @@ r> TO pci-device-slots \ and reset the slot array ; +DEFER func-pci-device-props + \ used for an gerneric device set up \ if a device has no special handling for setup \ the device file (pci-device_VENDOR_DEVICE.fs) can call @@ -659,6 +661,8 @@ dup assign-all-device-bars \ calc all BARs dup pci-set-irq-line \ set the interrupt pin dup pci-set-capabilities \ set up the capabilities - dup pci-device-props \ and generate all properties + dup func-pci-device-props \ and generate all properties drop \ forget the config-addr ; + +' pci-device-props TO func-pci-device-props -- 1.8.3.1 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev