linux-dev/arch/powerpc/kernel/eeh_sysfs.c, branch linus/master

powerpc: Add missing headers

2022-05-08T12:15:40Z

Don't inherit headers "by chances" from asm/prom.h, asm/mpc52xx.h, asm/pci.h etc... Include the needed headers, and remove asm/prom.h when it was needed exclusively for pulling necessary headers. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/be8bdc934d152a7d8ee8d1a840d5596e2f7d85e0.1646767214.git.christophe.leroy@csgroup.eu

powerpc/eeh: Pass eeh_dev to eeh_ops->resume_notify()

2020-07-26T13:34:20Z

Mechanical conversion of the eeh_ops interfaces to use eeh_dev to reference a specific device rather than pci_dn. No functional changes. Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200725081231.39076-8-oohall@gmail.com

powerpc/eeh_sysfs: Make clearing EEH_DEV_SYSFS saner

2020-01-23T10:31:19Z

The eeh_sysfs_remove_device() function is supposed to clear the EEH_DEV_SYSFS flag since it indicates the EEH sysfs entries have been added for a pci_dev. When the sysfs files are removed eeh_remove_device() the eeh_dev and the pci_dev have already been de-associated. This then causes the pci_dev_to_eeh_dev() call in eeh_sysfs_remove_device() to return NULL so the flag can't be cleared from the still-live eeh_dev. This problem is worked around in the caller by clearing the flag manually. However, this behaviour doesn't make a whole lot of sense, so this patch fixes it by: a) Re-ordering eeh_remove_device() so that eeh_sysfs_remove_device() is called before de-associating the pci_dev and eeh_dev. b) Making eeh_sysfs_remove_device() emit a warning if there's no corresponding eeh_dev for a pci_dev. The paths where the sysfs files are only reachable if EEH was setup for the device for the device in the first place so hitting this warning indicates a programming error. Signed-off-by: Oliver O'Halloran Reviewed-by: Sam Bobroff Tested-by: Sam Bobroff Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190715085612.8802-6-oohall@gmail.com

powerpc/eeh_sysfs: Remove double pci_dn lookup.

2020-01-23T10:31:19Z

In eeh_notify_resume_show() the pci_dn for the device is looked up once in the declaration block and then once after checking for a NULL eeh_dev. Remove the second lookup since it's pointless. Signed-off-by: Oliver O'Halloran Reviewed-by: Sam Bobroff Tested-by: Sam Bobroff Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190715085612.8802-5-oohall@gmail.com

powerpc/eeh_sysfs: ifdef pseries sr-iov sysfs properties

2020-01-23T10:31:18Z

There are several EEH sysfs properties that only exists when the "ibm,is-open-sriov-pf" property appears in the device tree node of the PCI device. This used on pseries to indicate to the guest that the hypervisor allows the guest to configure the SR-IOV capability. Doing this requires some handshaking between the guest, hypervisor and userspace when a VF is EEH frozen which is why these properties exist. This is all dead code on non-pseries platforms so wrap it in an #ifdef CONFIG_PPC_PSERIES to make the dependency clearer. Signed-off-by: Oliver O'Halloran Tested-by: Sam Bobroff Reviewed-by: Sam Bobroff Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190715085612.8802-4-oohall@gmail.com

powerpc/eeh_sysfs: Fix incorrect comment

2020-01-23T10:31:18Z

The EEH_ATTR_SHOW() helper is used to display fields from struct eeh_dev not struct pci_dn. Signed-off-by: Oliver O'Halloran Reviewed-by: Sam Bobroff Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190715085612.8802-3-oohall@gmail.com

powerpc: Replace GPL boilerplate with SPDX identifiers

2019-11-13T05:58:07Z

The FSF does not reside in "675 Mass Ave, Cambridge" anymore... let's simply use proper SPDX identifiers instead. Signed-off-by: Thomas Huth Acked-by: Russell Currey Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190828060737.32531-1-thuth@redhat.com

powerpc/eeh: Add include_passed to eeh_pe_state_clear()

2019-02-05T00:55:43Z

Add a parameter to eeh_pe_state_clear() that allows passed-through PEs to be excluded. Update callers to always pass true so that there is no change in behaviour. Also refactor to use direct traversal, to allow the removal of some boilerplate. This is to prepare for follow-up work for passed-through devices. Signed-off-by: Sam Bobroff Signed-off-by: Michael Ellerman

powerpc/eeh: remove sw_state from eeh_unfreeze_pe()

2019-02-05T00:55:42Z

eeh_unfreeze_pe() performs two operations: unfreezing a PE (which may cause firmware to unfreeze child PEs as well) and de-isolating the PE and it's children. To simplify this and support future work, separate out the de-isolation and perform it at the call sites (when necessary). There should be no change in behaviour. Signed-off-by: Sam Bobroff Signed-off-by: Michael Ellerman

powerpc/eeh: Add EEH notify resume sysfs

2018-01-27T09:02:52Z

Introduce a method for notify resume to be called from sysfs. In this patch one can now call notify resume from sysfs when is supported by platform. Signed-off-by: Bryant G. Ly Signed-off-by: Juan J. Alvarez Acked-by: Russell Currey [mpe: Add NULL check, add empty versions to avoid #ifdefs] Signed-off-by: Michael Ellerman