kernel.git/arch/powerpc/kernel/pci_dn.c, branch linux-5.3.y

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156

2019-05-30T18:26:35Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Richard Fontana Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman

powerpc/pci: Separate SR-IOV Calls

2017-12-11T02:03:35Z

SR-IOV can now be enabled for the powernv platform and pseries platform. Therefore move the appropriate calls to machine dependent code instead of relying on definition at compile time. Signed-off-by: Bryant G. Ly Signed-off-by: Juan J. Alvarez Acked-by: Russell Currey Reviewed-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman

powerpc/pci: Remove OF node back pointer from pci_dn

2017-08-31T04:26:12Z

The check_req() helper uses pci_get_pdn() to get an OF node pointer. pci_get_pdn() returns a pci_dn pointer which either: 1) from the OF node returned by pci_device_to_OF_node(); 2) from the parent child_list where entries don't have OF node pointers. Since check_req() does not care about 2), it can call pci_device_to_OF_node() directly, hence the change. The find_pe_dn() helper uses embedded pci_dn to get an OF node which is also stored in edev->pdev so let's take a shortcut and call pci_device_to_OF_node() directly. With these 2 changes, we can finally get rid of the OF node back pointer. Signed-off-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman

powerpc/eeh: Reduce use of pci_dn::node

2017-08-31T04:26:10Z

The pci_dn struct caches a OF device node pointer in order to access the "ibm,loc-code" property when EEH is recovering. However, when this happens in eeh_dev_check_failure(), we also have a pci_dev pointer which should have a valid pointer to the device node when pci_dn has one (both pointers are not NULL for physical functions and are NULL for virtual functions). This changes pci_remove_device_node_info() to look for a parent of the node being removed, just like pci_add_device_node_info() does when it references the parent node. This is the first step to get rid of pci_dn::node. Signed-off-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman

powerpc/pci: Remove unused parameter from add_one_dev_pci_data()

2017-08-31T04:26:07Z

pdev is always NULL, remove it. To make checkpatch.pl happy, this also removes the "out of memory" message. Signed-off-by: Alexey Kardashevskiy Reviewed-by: Andrew Donnellan Acked-by: Russell Currey Signed-off-by: Michael Ellerman

powerpc/pci: Fix build with PCI_IOV=y and EEH=n

2016-07-07T06:33:27Z

Despite attempting to fix this in commit fb36e9073693 ("powerpc/pci: Fix SRIOV not building without EEH enabled"), the build is still broken when PCI_IOV=y and EEH=n (eg. g5_defconfig with PCI_IOV=y): arch/powerpc/kernel/pci_dn.c: In function ‘remove_dev_pci_data’: arch/powerpc/kernel/pci_dn.c:230:18: error: unused variable ‘edev’ Incorporate Ben's idea of using __maybe_unused to avoid so many #ifdefs. Signed-off-by: Michael Ellerman

powerpc/pci: Delay populating pdn

2016-06-21T05:30:56Z

The pdn (struct pci_dn) instances are allocated from memblock or bootmem when creating PCI controller (hoses) in setup_arch(). PCI hotplug, which will be supported by proceeding patches, releases PCI device nodes and their corresponding pdn on unplugging event. The memory chunks for pdn instances allocated from memblock or bootmem are hard to reused after being released. This delays creating pdn by pci_devs_phb_init() from setup_arch() to core_initcall() so that they are allocated from slab. The memory consumed by pdn can be released to system without problem during PCI unplugging time. It indicates that pci_dn is unavailable in setup_arch() and the the fixup on pdn (like AGP's) can't be carried out that time. We have to do that in pcibios_root_bridge_prepare() on maple/pasemi/powermac platforms where/when the pdn is available. pcibios_root_bridge_prepare is called from subsys_initcall() which is executed after core_initcall() so the code flow does not change. At the mean while, the EEH device is created when pdn is populated, meaning pdn and EEH device have same life cycle. In turn, we needn't call eeh_dev_init() to create EEH device explicitly. Signed-off-by: Gavin Shan Reviewed-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman

powerpc/pci: Fix SRIOV not building without EEH enabled

2016-06-17T06:52:22Z

On Book3E CPUs (and possibly other configs), it is possible to have SRIOV (CONFIG_PCI_IOV) set without CONFIG_EEH. The SRIOV code does not check for this, and if EEH is disabled, pci_dn.c fails to build. Fix this by gating the EEH-specific code in the SRIOV implementation behind CONFIG_EEH. Fixes: 39218cd0 ("powerpc/eeh: EEH device for VF") Reported-by: Michael Ellerman Signed-off-by: Russell Currey Signed-off-by: Michael Ellerman

powerpc/pci: Export pci_traverse_device_nodes()

2016-05-11T11:54:25Z

This renames traverse_pci_devices() to pci_traverse_device_nodes(). The function traverses all subordinate device nodes of the specified one. Also, below cleanup applied to the function. No logical changes introduced. * Rename "pre" to "fn". * Avoid assignment in if condition reported from checkpatch.pl. Signed-off-by: Gavin Shan Reviewed-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman

powerpc/pci: Introduce pci_remove_device_node_info()

2016-05-11T11:54:25Z

This implements and exports pci_remove_device_node_info(). It's used to remove the pdn (struct pci_dn) for the indicated device node. The function is going to be used by PowerNV PCI hotplug driver. Signed-off-by: Gavin Shan Reviewed-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman