talos-op-linux/arch/powerpc/platforms/powernv, branch master

powernv/pci: Move pnv_pci_dma_bus_setup() to pci-ioda.c

2020-01-23T10:31:22+00:00

This is only used in pci-ioda.c so move it there and rename it to match. Signed-off-by: Oliver O'Halloran Reviewed-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200110070207.439-6-oohall@gmail.com

powernv/pci: Fold pnv_pci_dma_dev_setup() into the pci-ioda.c version

2020-01-23T10:31:22+00:00

pnv_pci_dma_dev_setup() does nothing but call the phb->dma_dev_setup() callback, if one exists. That callback is only set for normal PCIe PHBs so we can remove the layer of indirection and use the ioda version in the pci_controller_ops. Signed-off-by: Oliver O'Halloran Reviewed-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200110070207.439-5-oohall@gmail.com

powerpc/iov: Move VF pdev fixup into pcibios_fixup_iov()

2020-01-23T10:31:22+00:00

An ioda_pe for each VF is allocated in pnv_pci_sriov_enable() before the pci_dev for the VF is created. We need to set the pe->pdev pointer at some point after the pci_dev is created. Currently we do that in: pcibios_bus_add_device() pnv_pci_dma_dev_setup() (via phb->ops.dma_dev_setup) /* fixup is done here */ pnv_pci_ioda_dma_dev_setup() (via pnv_phb->dma_dev_setup) The fixup needs to be done before setting up DMA for for the VF's PE, but there's no real reason to delay it until this point. Move the fixup into pnv_pci_ioda_fixup_iov() so the ordering is: pcibios_add_device() pnv_pci_ioda_fixup_iov() (via ppc_md.pcibios_fixup_sriov) pcibios_bus_add_device() ... This isn't strictly required, but it's a slightly more logical place to do the fixup and it simplifies pnv_pci_dma_dev_setup(). Signed-off-by: Oliver O'Halloran Reviewed-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200110070207.439-4-oohall@gmail.com

powernv/pci: Remove dma_dev_setup() for NPU PHBs

2020-01-23T10:31:21+00:00

The pnv_pci_dma_dev_setup() only does something when: 1) There PHB contains VFs, or 2) The PHB defines a dma_dev_setup() callback in the pnv_phb structure. Neither is true for NPU PHBs so there's no reason to set the callback. Reviewed-by: Alexey Kardashevskiy Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200110070207.439-3-oohall@gmail.com

powerpc/powernv: Allow manually invoking special reboots

2020-01-23T10:31:21+00:00

OPAL provides several different kinds of reboot for the kernel to use, namely forcing a full reboot, platform error reboot and MPIPL. Right now triggering the alternative resets requires some ad-hoc method such as triggering a kernel crash and hoping the stars align. It's sometimes handy to be able to trigger one of these resets directly, so add a way to do that. Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191101085522.3055-2-oohall@gmail.com

powerpc/powernv: Use common code for the symbol_map export

2020-01-23T10:31:21+00:00

Long before we had a generic way for firmware to export memory ranges of interest we added a special case for the skiboot symbol map. The code is pretty much identical to the generic export so re-use the code. Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191101062611.32610-2-oohall@gmail.com

powerpc/powernv: Rework exports to support subnodes

2020-01-23T10:31:20+00:00

Originally we only had a handful of exported memory ranges, but we'd to export the per-core trace buffers. This results in a lot of files in the exports directory which is a but unfortunate. We can clean things up a bit by turning subnodes into subdirectories of the exports directory. Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191101062611.32610-1-oohall@gmail.com

powernv/pci: Add a debugfs entry to dump PHB's IODA PE state

2020-01-23T10:31:20+00:00

Add a debugfs entry to dump the state of the active IODA PEs. The IODA PE state reflects how the PHB's internal concept of a PE is configured. This is separate to the EEH PE state and is managed power the PowerNV PCI backend rather than the EEH core. Signed-off-by: Oliver O'Halloran Reviewed-by: Alexey Kardashevskiy [mpe: Use DEFINE_DEBUGFS_ATTRIBUTE] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190912052945.12589-3-oohall@gmail.com

powernv/pci: Allow any write trigger the diag dump

2020-01-23T10:31:20+00:00

Make the dump trigger off any input rather than just '1'. This allows you to write "echo 1> dump_diag_data" and it'll do what you want rather than erroring out pointlessly. Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190912052945.12589-2-oohall@gmail.com

powernv/pci: Use pnv_phb as the private data for debugfs entries

2020-01-23T10:31:20+00:00

Use the pnv_phb structure as the private data pointer for the debugfs files. This lets us delete some code and an open-coded use of hose->private_data. Signed-off-by: Oliver O'Halloran Reviewed-by: Alexey Kardashevskiy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190912052945.12589-1-oohall@gmail.com