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| author |   Jonathan Chocron <jonnyc@amazon.com> | 2019-03-28 13:57:56 +0200 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2019-04-25 16:33:07 -0500 |
| commit | 4166bfe53093b687a0b1b22e5d943e143b8089b2 (patch) | |
| tree | 00bf187722c7810ff0bb113e929d6e8bdc9ee6e6 /include/linux/pci-ecam.h | |
| parent | Linux 5.1-rc1 (diff) | |
| download | wireguard-linux-4166bfe53093b687a0b1b22e5d943e143b8089b2.tar.xz wireguard-linux-4166bfe53093b687a0b1b22e5d943e143b8089b2.zip | |
PCI: al: Add Amazon Annapurna Labs PCIe host controller driver
Add driver for Amazon's Annapurna Labs PCIe host controller. The
controller is based on DesignWare's IP.
The controller doesn't support accessing the Root Port's config space via
ECAM, so we obtain its base address via an AMZN0001 device.
Furthermore, the DesignWare PCIe controller doesn't filter out config
transactions sent to devices 1 and up on its bus, so they are filtered by
the driver.
All subordinate buses do support ECAM access.
Implementing specific PCI config access functions involves:
- Adding an init function to obtain the Root Port's base address from
an AMZN0001 device.
- Adding a new entry in the MCFG quirk array.
[bhelgaas: Note that there is no Kconfig option for this driver because it
is only intended for use with the generic ACPI host bridge driver. This
driver is only needed because the DesignWare IP doesn't completely support
ECAM access to the root bus.]
Link: https://lore.kernel.org/lkml/1553774276-24675-1-git-send-email-jonnyc@amazon.com
Co-developed-by: Vladimir Aerov <vaerov@amazon.com>
Signed-off-by: Jonathan Chocron <jonnyc@amazon.com>
Signed-off-by: Vladimir Aerov <vaerov@amazon.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Diffstat (limited to 'include/linux/pci-ecam.h')
| -rw-r--r-- | include/linux/pci-ecam.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pci-ecam.h b/include/linux/pci-ecam.h index 29efa09d686b..a73164c85e78 100644 --- a/include/linux/pci-ecam.h +++ b/include/linux/pci-ecam.h @@ -56,6 +56,7 @@ extern struct pci_ecam_ops thunder_pem_ecam_ops; /* Cavium ThunderX 1.x & 2.x */ extern struct pci_ecam_ops pci_thunder_ecam_ops; /* Cavium ThunderX 1.x */ extern struct pci_ecam_ops xgene_v1_pcie_ecam_ops; /* APM X-Gene PCIe v1 */ extern struct pci_ecam_ops xgene_v2_pcie_ecam_ops; /* APM X-Gene PCIe v2.x */ +extern struct pci_ecam_ops al_pcie_ops; /* Amazon Annapurna Labs PCIe */ #endif #ifdef CONFIG_PCI_HOST_COMMON |