PCI: Add resizable BAR infrastructure

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Add resizable BAR infrastructure, including defines and helper functions to
read the possible sizes of a BAR and update its size.  See PCIe r3.1, sec
7.22.

Link: https://pcisig.com/sites/default/files/specification_documents/ECN_Resizable-BAR_24Apr2008.pdf
Signed-off-by: Christian König <christian.koenig@amd.com>
[bhelgaas: rename to functions with "rebar" (to match #defines), drop shift
#defines, drop "_MASK" suffixes, fix typos, fix kerneldoc]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

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Christian König 2017-10-24 14:40:20 -05:00 • committed by Bjorn Helgaas

parent cb21bc9469

commit 276b738deb

3 changed files with 115 additions and 2 deletions

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101

drivers/pci/pci.c

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8

drivers/pci/pci.h

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8

include/uapi/linux/pci_regs.h

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