The series is split from "[PATCH v8 00/45] powerpc/powernv: PCI hotplug support". Another series (A) sent to linux-ppc-dev maillist as it's only related to PowerPC. Besides, this series needs the firmware patches (B) to work. Without the firmware patches, the PCI hotplug driver won't detect and populate any PCI slots. So this series is working on old firmware. (A): https://patchwork.ozlabs.org/patch/617768/ (B): https://patchwork.ozlabs.org/patch/617749/ The series of patches is highlighted as below: * In order to create PE during PCI hot plugging, pcibios_setup_bridge() which is called to update bridge's window populates the PE, together with the associated resources like IO/M32/M64 segments, DMA windows etc. * One refcount is maintained by each PE to track the number of PCI devices that are associated with the PE. The refcount is increased by one when a new PCI device joins the PE. It is decreased by one when a PCI device is released (pcibios_release_device()). The PE together with the used resources will be destroyed when refcount reaches to 0, meaning no PCI device needs the PE any more. * If the firmware has capability to support PCI slot and reset functionality, the reset required by EEH recovery is routed to firmware. Otherwise, it is done in kernel as before. * Changes to drivers/of/fdt.c in order to use OF changeset in hotplug driver. * PCI hotplug driver for PowerNV platform. The PCI slots are identified by firmware and exposed to kernel through device tree. Firmware provides APIs to get presence/power state or set power state from/to PCI slot. The PCI slot hotplug state is sychronized with its power state. When user changes PCI slot power state from off to on through sysfs file, the PCI devices behind the PCI slot will be brought into online. Otherwise, the PCI slot's subordinate devices will be removed from the system. Changelog ========= v9: * Rebased to linux-powerpc next branch + (A). * Patch order, split and merge (Alexey / Alistair) * Lots of misc comments covered, I don't elaborate them one by one (Alexey) * One more patch to export detach_of_node() * Fixed uninitialized variables, memory leak on @fdt1. Added flush_work() and other misc comments (Alexey / Alistair) * Same testing scenario carried as v8. More will be carried out later. * The confused function names aren't changed. Will check with Alexey and Alistair. Or have a separate patch to address it later. v8: * Rebased to linux-powerpc next branch. * Resolve comments from Alexey and Daniel on PCI part * Resolve comments from Rob on fdt.c * Retested (refer to the "Testing section") v7: * Reworked revision to some extent. * Rebased to powerpc/next repository. * Reorder/split/merge/drop according - Alexey. * Defined macros and use array to track IO/M32/M64/DMA32 segments - Alexey. * Merged 3 files to one for the hotplug driver - Alexey. * As part of OPAL API, defined macros for PCI slot power state, hotplug message type. Defined macros for PCI slot power confirmed state in hotplug driver. * Misc comments from Alexey. * Reworked unflatten_dt_node() to avoid recursive function calls. * Use EXPORT_SYMBOL_GPL() and document function's input/output - Rob/Frank. v6: * Patch reorder, split, squash - Alexey. * Minor coding style - Alexey. * Better function names for pcibios_{add,remove}_pci_devices - Bjorn * Replace pr_warn() with dev_warn() in PowerNV hotplug driver - Bjorn * Concurrent depth as parameter passed to __unflatten_dt_node() - Grant / Alexey * Replace overlay with of_changeset - Grant v5: * Rebased to 4.1.rc6 and some unmerged patches as below: Alexey's DDW patchset (v11); Gavin's EEH error injection support (in mpe's next branch); Richard's EEH cleanup patches (in mpe's next branch); Richard's EEH support for VF (v7); Gavin's misc EEH fixes for 4.2; * The revision bases on skiboot corresponding patches (v7): https://patchwork.ozlabs.org/patch/480437/ * Utilize OF overlay to update device-tree with help of newly introduced OPAL API opal_get_overlay_dt(). * Split patches for easy review according to aik's comments. * Fix coding style from checkpatchc.pl as pointed by aik. * Code cleanup and misc fixup according to aik's input. v4: * Rebased to 4.1.RC1 * Added API to unflatten FDT blob to device node sub-tree, which is attached the indicated parent device node. The original mechanism based on formatted string stream has been dropped. * The PATCH[v3 09/21] ("powerpc/eeh: Delay probing EEH device during hotplug") was picked up sent to linux-ppc@ separately for review as Richard's "VF EEH Support" depends on that. v3: * Rebased to 4.1.RC0 * PowerNV PCI infrasturcture is total refactored in order to support PCI hotplug. The PowerNV hotplug driver is also reworked a lot because of the changes in skiboot in order to support PCI hotplug. Gavin Shan (22): PCI: Add pcibios_setup_bridge() powerpc/pci: Override pcibios_setup_bridge() powerpc/powernv: Move pnv_pci_ioda_setup_opal_tce_kill() around powerpc/powernv: Increase PE# capacity powerpc/powernv: Allocate PE# in reverse order powerpc/powernv: Create PEs in pcibios_setup_bridge() powerpc/powernv: Setup PE for root bus powerpc/powernv: Extend PCI bridge resources powerpc/powernv: Make pnv_ioda_deconfigure_pe() visible powerpc/powernv: Dynamically release PE powerpc/pci: Update bridge windows on PCI plug powerpc/pci: Delay populating pdn powerpc/powernv: Support PCI slot ID powerpc/powernv: Use PCI slot reset infrastructure powerpc/powernv: Functions to get/set PCI slot state drivers/of: Split unflatten_dt_node() drivers/of: Avoid recursively calling unflatten_dt_node() drivers/of: Rename unflatten_dt_node() drivers/of: Specify parent node in of_fdt_unflatten_tree() drivers/of: Return allocated memory from of_fdt_unflatten_tree() drivers/of: Export of_detach_node() PCI/hotplug: PowerPC PowerNV PCI hotplug driver arch/powerpc/include/asm/eeh.h | 2 +- arch/powerpc/include/asm/opal-api.h | 18 +- arch/powerpc/include/asm/opal.h | 9 +- arch/powerpc/include/asm/pci-bridge.h | 2 + arch/powerpc/include/asm/pnv-pci.h | 11 + arch/powerpc/include/asm/ppc-pci.h | 2 - arch/powerpc/kernel/eeh_dev.c | 17 +- arch/powerpc/kernel/pci-common.c | 16 +- arch/powerpc/kernel/pci_dn.c | 23 +- arch/powerpc/platforms/maple/pci.c | 34 +- arch/powerpc/platforms/pasemi/pci.c | 3 - arch/powerpc/platforms/powermac/pci.c | 38 +- arch/powerpc/platforms/powernv/eeh-powernv.c | 49 +- arch/powerpc/platforms/powernv/opal-wrappers.S | 5 + arch/powerpc/platforms/powernv/pci-ioda.c | 481 ++++++++++---- arch/powerpc/platforms/powernv/pci.c | 105 ++- arch/powerpc/platforms/powernv/pci.h | 10 +- arch/powerpc/platforms/pseries/setup.c | 6 +- drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c | 2 +- drivers/of/dynamic.c | 1 + drivers/of/fdt.c | 372 +++++++---- drivers/of/unittest.c | 2 +- drivers/pci/hotplug/Kconfig | 13 + drivers/pci/hotplug/Makefile | 3 + drivers/pci/hotplug/pnv_php.c | 869 +++++++++++++++++++++++++ drivers/pci/setup-bus.c | 5 + include/linux/of_fdt.h | 5 +- include/linux/pci.h | 1 + 28 files changed, 1748 insertions(+), 356 deletions(-) create mode 100644 drivers/pci/hotplug/pnv_php.c -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
