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SubjectRE: [PATCH v5 0/4] PCI: Add support for PCI Enhanced Allocation "BARs"
Date
[PATCH 3/4 & 4/4] Acked-by: Sean O. Stalley <sean.stalley@intel.com>

I won't be able to test it out until next week, but I like how it looks :)

Thanks Again,
Sean

> -----Original Message-----
> From: David Daney [mailto:ddaney.cavm@gmail.com]
> Sent: Tuesday, October 06, 2015 4:51 PM
> To: linux-kernel@vger.kernel.org; linux-pci@vger.kernel.org; Bjorn Helgaas;
> Michael S. Tsirkin; Rafał Miłecki; linux-api@vger.kernel.org; Stalley, Sean;
> yinghai@kernel.org; rajatxjain@gmail.com; gong.chen@linux.intel.com
> Cc: David Daney
> Subject: [PATCH v5 0/4] PCI: Add support for PCI Enhanced Allocation
> "BARs"
>
> From: David Daney <david.daney@cavium.com>
>
> The original patches are from Sean O. Stalley. I made a few tweaks, but feel
> that it is substancially Sean's work, so I am keeping the patch set version
> numbering scheme going.
>
> Tested on Cavium ThunderX system with 4 Root Complexes containing 50
> devices/bridges provisioned with EA.
>
> Here is Sean's description of the patches:
>
> PCI Enhanced Allocation is a new method of allocating MMIO & IO
> resources for PCI devices & bridges. It can be used instead of the traditional
> PCI method of using BARs.
>
> EA entries are hardware-initialized to a fixed address.
> Unlike BARs, regions described by EA are cannot be moved.
> Because of this, only devices which are permanently connected to the PCI
> bus can use EA. A removable PCI card must not use EA.
>
> This patchset adds support for using EA entries instead of BARs on Root
> Complex Integrated Endpoints.
>
> The Enhanced Allocation ECN is publicly available here:
> https://www.pcisig.com/specifications/conventional/ECN_Enhanced_Alloca
> tion_23_Oct_2014_Final.pdf
>
>
> Changes from V1:
> - Use generic PCI resource claim functions (instead of EA-specific
> functions)
> - Only add support for RCiEPs (instead of all devices).
> - Removed some debugging messages leftover from early testing.
>
> Changes from V2 (By David Daney):
> - Add ea_cap to struct pci_device, to aid in finding the EA capability.
> - Factored EA entity decoding into a separate function.
> - Add functions to find EA entities by BEI or Property.
> - Add handling of EA provisioned bridges.
> - Add handling of EA SRIOV BARs.
> - Try to assign proper resource parent so that SRIOV device creation
> can occur.
>
> Changes from V3 (By David Daney):
> - Discarded V3 changes and started over fresh based on Sean's V2.
> - Add more support/checking for Entry Properties.
> - Allow EA behind bridges.
> - Rewrite some error messages.
> - Add patch 3/5 to prevent resizing, and better handle
> assigning, of fixed EA resources.
> - Add patch 4/5 to handle EA provisioned SRIOV devices.
> - Add patch 5/5 to handle EA provisioned bridges.
>
> Changes from V4 (By David Daney):
> - Drop patch 5/5 to handle EA provisioned bridges.
> - Drop cases for bridge resources in 2/5.
> - Drop unnecessary fallback resource parent handling in 3/5
> - Small code formatting improvements.
>
> David Daney (2):
> PCI: Handle IORESOURCE_PCI_FIXED when sizing and assigning resources.
> PCI: Handle Enhanced Allocation (EA) capability for SRIOV devices.
>
> Sean O. Stalley (2):
> PCI: Add Enhanced Allocation register entries
> PCI: Add support for Enhanced Allocation devices
>
> drivers/pci/iov.c | 11 ++-
> drivers/pci/pci.c | 189
> ++++++++++++++++++++++++++++++++++++++++++
> drivers/pci/pci.h | 1 +
> drivers/pci/probe.c | 3 +
> drivers/pci/setup-bus.c | 50 ++++++++++-
> include/uapi/linux/pci_regs.h | 44 +++++++++-
> 6 files changed, 292 insertions(+), 6 deletions(-)
>
> --
> 1.9.1



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