linux-dev/drivers/pci/hotplug/pnv_php.c, branch linus/master

PCI: hotplug: Clean up include files

2022-04-05T16:13:33Z

arch/powerpc/include/asm/prom.h includes some headers that it doesn't need itself. Add the missing headers to files that include prom.h so we can remove them from prom.h. Link: https://lore.kernel.org/r/79201f5fae8d003164ac36ed3be7789db1bc5ab4.1648833421.git.christophe.leroy@csgroup.eu Signed-off-by: Christophe Leroy Signed-off-by: Bjorn Helgaas

PCI: Change the type of probe argument in reset functions

2021-08-18T22:32:42Z

Change the type of probe argument in functions which implement reset methods from int to bool to make the context and intent clear. Suggested-by: Alex Williamson Link: https://lore.kernel.org/r/20210817180500.1253-10-ameynarkhede03@gmail.com Signed-off-by: Amey Narkhede Signed-off-by: Bjorn Helgaas

pci/hotplug/pnv-php: Wrap warnings in macro

2020-01-23T10:31:17Z

An opencapi slot doesn't have an associated bridge device. It's not needed for operation, but any warning is displayed through pci_warn() which uses the pci_dev struct of the assocated bridge device. So wrap those warning so that a different trace mechanism can be used if it's an opencapi slot. Reviewed-by: Alastair D'Silva Reviewed-by: Andrew Donnellan Signed-off-by: Frederic Barrat Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191121134918.7155-11-fbarrat@linux.ibm.com

pci/hotplug/pnv-php: Relax check when disabling slot

2020-01-23T10:31:17Z

The driver only allows to disable a slot in the POPULATED state. However, if an error occurs while enabling the slot, say because the link couldn't be trained, then the POPULATED state may not be reached, yet the power state of the slot is on. So allow to disable a slot in the REGISTERED state. Removing the devices will do nothing since it's not populated, and we'll set the power state of the slot back to off. Reviewed-by: Alastair D'Silva Reviewed-by: Andrew Donnellan Signed-off-by: Frederic Barrat Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191121134918.7155-10-fbarrat@linux.ibm.com

pci/hotplug/pnv-php: Register opencapi slots

2020-01-23T10:31:17Z

Add the opencapi PHBs to the list of PHBs being scanned to look for slots. Signed-off-by: Frederic Barrat Reviewed-by: Andrew Donnellan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191121134918.7155-9-fbarrat@linux.ibm.com

pci/hotplug/pnv-php: Improve error msg on power state change failure

2020-01-23T10:31:17Z

When changing the slot state, if opal hits an error and tells as such in the asynchronous reply, the warning "Wrong msg" is logged, which is rather confusing. Instead we can reuse the better message which is already used when we couldn't submit the asynchronous opal request initially. Reviewed-by: Alastair D'Silva Reviewed-by: Andrew Donnellan Signed-off-by: Frederic Barrat Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191121134918.7155-8-fbarrat@linux.ibm.com

pci/hotplug/pnv-php: Remove erroneous warning

2020-01-23T10:31:17Z

On powernv, when removing a device through hotplug, the following warning is logged: Invalid refcount <.> on <...> It may be incorrect, the refcount may be set to a higher value than 1 and be valid. of_detach_node() can drop more than one reference. As it doesn't seem trivial to assert the correct value, let's remove the warning. Reviewed-by: Alastair D'Silva Reviewed-by: Andrew Donnellan Signed-off-by: Frederic Barrat Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191121134918.7155-7-fbarrat@linux.ibm.com

pci-hotplug/pnv_php: Add attention indicator support

2019-09-05T04:22:39Z

pnv_php is generally used with PCIe bridges which provide a native interface for setting the attention and power indicator LEDs. Wire up those interfaces even if firmware does not have support for them (yet...) Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190903101605.2890-11-oohall@gmail.com

pci-hotplug/pnv_php: Add support for IODA3 Power9 PHBs

2019-09-05T04:22:39Z

Currently we check that an IODA2 compatible PHB is upstream of this slot. This is mainly to avoid pnv_php creating slots for the various "virtual PHBs" that we create for NVLink. There's no real need for this restriction so allow it on IODA3. Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190903101605.2890-10-oohall@gmail.com

pci-hotplug/pnv_php: Add a reset_slot() callback

2019-09-05T04:22:39Z

When performing EEH recovery of devices in a hotplug slot we need to use the slot driver's ->reset_slot() callback to prevent spurious hotplug events due to spurious DLActive and PresDet change interrupts. Add a reset_slot() callback to pnv_php so we can handle recovery of devices in pnv_php managed slots. Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190903101605.2890-9-oohall@gmail.com