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provide interfaces to access PCIe capabilities registers

From:  Jiang Liu <liuj97@gmail.com>
To:  Bjorn Helgaas <bhelgaas@google.com>, Don Dutile <ddutile@redhat.com>
Subject:  [RFC PATCH v2 00/32] provide interfaces to access PCIe capabilities registers
Date:  Wed, 25 Jul 2012 00:31:12 +0800
Message-ID:  <1343147504-25891-1-git-send-email-jiang.liu@huawei.com>
Cc:  Jiang Liu <liuj97@gmail.com>, Yinghai Lu <yinghai@kernel.org>, Taku Izumi <izumi.taku@jp.fujitsu.com>, "Rafael J . Wysocki" <rjw@sisk.pl>, Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>, Yijing Wang <wangyijing@huawei.com>, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Archive-link:  Article

From: Jiang Liu <liuj97@gmail.com>

As suggested by Bjorn Helgaas and Don Dutile in threads
http://www.spinics.net/lists/linux-pci/msg15663.html, we could improve access
to PCIe capabilities register in to way:
1) cache content of PCIe Capabilities Register into struct pce_dev to avoid
   repeatedly reading this register because it's read only.
2) provide access functions for PCIe Capabilities registers to hide differences
   among PCIe base specifications, so the caller don't need to handle those
   differences.

This patch set applies to
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci-next

And you could pull the change set from
https://github.com/jiangliu/linux.git topic/pcie-cap

These patch set is still RFC. It provides the new interfaces and has made the
major changes to adopt those new interfaces. But there are still several device
drivers left untouched. Any comments about the new interfaces are welcomed,
especially about function names:). Once we reach an agreement, I will send out
a formal version with all needed work done.

v2: 1) change return value to 0 when the register is not implemented by
       V1 PCIe devices.
    2) Change all driver in the source tree to use the new interfaces.

Jiang Liu (29):
  PCI: add PCIe capabilities access functions to hide differences among
    PCIe specs
  PCI/core: use PCIe capabilities access functions to simplify
    implementation
  PCI/hotplug: use PCIe capabilities access functions to simplify
    implementation
  PCI/portdrv: use PCIe capabilities access functions to simplify
    implementation
  PCI/pciehp: use PCIe capabilities access functions to simplify
    implementation
  PCI/PME: use PCIe capabilities access functions to simplify
    implementation
  PCI/AER: use PCIe capabilities access functions to simplify
    implementation
  PCI/ASPM: use PCIe capabilities access functions to simplify
    implementation
  PCI/ARM: use PCIe capabilities access functions to simplify
    implementation
  PCI/MIPS: use PCIe capabilities access functions to simplify
    implementation
  PCI/tile: use PCIe capabilities access functions to simplify
    implementation
  PCI/r8169: use PCIe capabilities access functions to simplify
    implementation
  PCI/broadcom: use PCIe capabilities access functions to simplify
    implementation
  PCI/igb: use PCIe capabilities access functions to simplify
    implementation
  PCI/vxge: use PCIe capabilities access functions to simplify
    implementation
  PCI/mlx4: use PCIe capabilities access functions to simplify
    implementation
  PCI/niu: use PCIe capabilities access functions to simplify
    implementation
  PCI/myri10ge: use PCIe capabilities access functions to simplify
    implementation
  PCI/chelsio: use PCIe capabilities access functions to simplify
    implementation
  PCI/atl1c: use PCIe capabilities access functions to simplify
    implementation
  PCI/ath9k: use PCIe capabilities access functions to simplify
    implementation
  PCI/iwl: use PCIe capabilities access functions to simplify
    implementation
  PCI/mthca: use PCIe capabilities access functions to simplify
    implementation
  PCI/qib: use PCIe capabilities access functions to simplify
    implementation
  PCI/qla: use PCIe capabilities access functions to simplify
    implementation
  PCI/radeon: use PCIe capabilities access functions to simplify
    implementation
  PCI/tsi721: use PCIe capabilities access functions to simplify
    implementation
  PCI/et131x: use PCIe capabilities access functions to simplify
    implementation
  PCI/rtl8192e: use PCIe capabilities access functions to simplify
    implementation

Yijing Wang (3):
  PCI: add pcie_flags_reg into struct pci_dev to cache PCIe
    capabilities register
  PCI: introduce pci_pcie_type(dev) to replace pci_dev->pcie_type
  PCI: remove unused field pcie_type from struct pci_dev

 arch/arm/mach-tegra/pcie.c                         |    7 +-
 arch/mips/pci/pci-octeon.c                         |    7 +-
 arch/powerpc/platforms/powernv/pci-ioda.c          |    2 +-
 arch/tile/kernel/pci.c                             |   17 +-
 drivers/gpu/drm/radeon/evergreen.c                 |    9 +-
 drivers/infiniband/hw/mthca/mthca_reset.c          |    8 +-
 drivers/infiniband/hw/qib/qib_pcie.c               |   40 ++-
 drivers/iommu/intel-iommu.c                        |    6 +-
 drivers/net/ethernet/atheros/atl1c/atl1c_main.c    |    2 +-
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c   |   24 +-
 drivers/net/ethernet/broadcom/tg3.c                |   46 ++--
 drivers/net/ethernet/chelsio/cxgb3/t3_hw.c         |   19 +-
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c    |   10 +-
 drivers/net/ethernet/chelsio/cxgb4/t4_hw.c         |    7 +-
 drivers/net/ethernet/intel/e1000e/netdev.c         |   20 +-
 drivers/net/ethernet/intel/igb/igb_main.c          |   12 +-
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c      |    2 +-
 drivers/net/ethernet/mellanox/mlx4/reset.c         |    8 +-
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c   |   21 +-
 drivers/net/ethernet/neterion/vxge/vxge-config.c   |    4 +-
 .../net/ethernet/qlogic/netxen/netxen_nic_main.c   |    2 +-
 drivers/net/ethernet/realtek/r8169.c               |   35 +--
 drivers/net/ethernet/sun/niu.c                     |    9 +-
 drivers/net/wireless/ath/ath9k/pci.c               |   18 +-
 drivers/net/wireless/iwlegacy/common.h             |    5 +-
 drivers/net/wireless/iwlwifi/iwl-trans-pcie.c      |    4 +-
 drivers/net/wireless/rtlwifi/pci.c                 |    8 +-
 drivers/pci/access.c                               |  157 ++++++++++++
 drivers/pci/hotplug/pciehp_acpi.c                  |    6 +-
 drivers/pci/hotplug/pciehp_hpc.c                   |   10 +-
 drivers/pci/hotplug/pcihp_slot.c                   |   12 +-
 drivers/pci/iov.c                                  |    6 +-
 drivers/pci/pci.c                                  |  262 +++++---------------
 drivers/pci/pcie/aer/aer_inject.c                  |    2 +-
 drivers/pci/pcie/aer/aerdrv.c                      |   23 +-
 drivers/pci/pcie/aer/aerdrv_acpi.c                 |    2 +-
 drivers/pci/pcie/aer/aerdrv_core.c                 |   27 +-
 drivers/pci/pcie/aspm.c                            |  108 ++++----
 drivers/pci/pcie/pme.c                             |   23 +-
 drivers/pci/pcie/portdrv_bus.c                     |    2 +-
 drivers/pci/pcie/portdrv_core.c                    |   24 +-
 drivers/pci/pcie/portdrv_pci.c                     |   15 +-
 drivers/pci/probe.c                                |   29 +--
 drivers/pci/quirks.c                               |    9 +-
 drivers/pci/search.c                               |    2 +-
 drivers/rapidio/devices/tsi721.c                   |   13 +-
 drivers/scsi/qla2xxx/qla_init.c                    |    4 +-
 drivers/scsi/qla2xxx/qla_nx.c                      |    8 +-
 drivers/scsi/qla4xxx/ql4_nx.c                      |    4 +-
 drivers/staging/et131x/et131x.c                    |    9 +-
 drivers/staging/rtl8192e/rtl8192e/rtl_pci.c        |    8 +-
 include/linux/pci.h                                |   17 +-
 include/linux/pci_regs.h                           |    2 +
 53 files changed, 510 insertions(+), 626 deletions(-)

-- 
1.7.9.5



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