18 Sep, 2020
1 commit
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Ampere Altra SOC supports only 32-bit ECAM reads. Add an MCFG quirk for
the platform.Link: https://lore.kernel.org/r/1596751055-12316-1-git-send-email-tuanphan@os.amperecomputing.com
Signed-off-by: Tuan Phan
Signed-off-by: Bjorn Helgaas
07 May, 2020
1 commit
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Most ECAM host drivers are just different pci_ecam_ops which can be DT
match table data. That's already the case in some cases, but let's
do that for all the ECAM drivers. Then we can use
of_device_get_match_data() in pci_host_common_probe() and eliminate the
probe wrapper functions and use pci_host_common_probe() directly for
probe.Link: https://lore.kernel.org/r/20200409234923.21598-4-robh@kernel.org
Signed-off-by: Rob Herring
Signed-off-by: Lorenzo Pieralisi
Acked-by: Bjorn Helgaas
Cc: Zhou Wang
Cc: Lorenzo Pieralisi
Cc: Andrew Murray
Cc: Bjorn Helgaas
Cc: Will Deacon
Cc: Robert Richter
Cc: Marc Gonzalez
Cc: Mans Rullgard
Cc: linux-pci@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
01 May, 2020
2 commits
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Enable building host-generic and its host-common dependency as a
module.Link: https://lore.kernel.org/r/20200409234923.21598-3-robh@kernel.org
Signed-off-by: Rob Herring
Signed-off-by: Lorenzo Pieralisi
Acked-by: Will Deacon
Acked-by: Bjorn Helgaas
Cc: Lorenzo Pieralisi
Cc: Andrew Murray
Cc: Bjorn Helgaas
Cc: Will Deacon
Cc: linux-pci@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org -
struct pci_ecam_ops is typically DT match table data which is defined to
be const. It's also best practice for ops structs to be const. Ideally,
we'd make struct pci_ops const as well, but that becomes pretty
invasive, so for now we just cast it where needed.Link: https://lore.kernel.org/r/20200409234923.21598-2-robh@kernel.org
Signed-off-by: Rob Herring
Signed-off-by: Lorenzo Pieralisi
Acked-by: Bjorn Helgaas
Acked-by: Catalin Marinas
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Lorenzo Pieralisi
Cc: Andrew Murray
Cc: Bjorn Helgaas
Cc: "Rafael J. Wysocki"
Cc: Len Brown
Cc: Jonathan Chocron
Cc: Zhou Wang
Cc: Robert Richter
Cc: Toan Le
Cc: Marc Gonzalez
Cc: Mans Rullgard
Cc: linux-acpi@vger.kernel.org
26 Apr, 2019
1 commit
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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
Signed-off-by: Jonathan Chocron
Signed-off-by: Vladimir Aerov
Signed-off-by: Bjorn Helgaas
Reviewed-by: David Woodhouse
Reviewed-by: Benjamin Herrenschmidt
Acked-by: Lorenzo Pieralisi
31 May, 2018
1 commit
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Add support for unbinding the generic PCI host controller. This is
particularly useful when working in virtual environments where the
controller may come and go, but possibly not only there.Signed-off-by: Jan Kiszka
Signed-off-by: Bjorn Helgaas
CC: Will Deacon
CC: Lorenzo Pieralisi
29 Jan, 2018
1 commit
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Add SPDX GPL-2.0 to all PCI files that specified the GPL version 2 license.
Remove the boilerplate GPL version 2 language, relying on the assertion in
b24413180f56 ("License cleanup: add SPDX GPL-2.0 license identifier to
files with no license") that the SPDX identifier may be used instead of the
full boilerplate text.Signed-off-by: Bjorn Helgaas
Reviewed-by: Greg Kroah-Hartman
19 Apr, 2017
1 commit
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pci_host_common_probe() is defined when CONFIG_PCI_HOST_COMMON=y;
therefore the function declaration should match that.drivers/pci/host/pcie-tango.c:300:9: error:
implicit declaration of function 'pci_host_common_probe'Signed-off-by: Marc Gonzalez
Signed-off-by: Bjorn Helgaas
23 Mar, 2017
1 commit
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struct pci_ecam_ops embeds a struct pci_ops. Explicitly request the
definition for struct pci_ops, otherwise gcc might complain:include/linux/pci-ecam.h:29:19: error: field 'pci_ops' has incomplete type
Signed-off-by: Marc Gonzalez
Signed-off-by: Bjorn Helgaas
07 Dec, 2016
5 commits
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PCIe controllers in X-Gene SoCs are not ECAM compliant: software needs to
configure additional controller's register to address device at
bus:dev:function.Add a quirk to discover controller MMIO register space and configure
controller registers to select and address the target secondary device.The quirk will only be applied for X-Gene PCIe MCFG table with
OEM revison 1, 2, 3 or 4 (PCIe controller v1 and v2 on X-Gene SoCs).Tested-by: Jon Masters
Signed-off-by: Duc Dang
Signed-off-by: Bjorn Helgaas -
ThunderX pass1.x requires to emulate the EA headers for on-chip devices
hence it has to use custom pci_thunder_ecam_ops for accessing PCI config
space (pci-thunder-ecam.c). Add new entries to MCFG quirk array where it
can be applied while probing ACPI based PCI host controller.ThunderX pass1.x is using the same way for accessing off-chip devices
(so-called PEM) as silicon pass-2.x so we need to add PEM quirk entries
too.Quirk is considered for ThunderX silicon pass1.x only which is identified
via MCFG revision 2.ThunderX pass 1.x requires the following accessors:
NUMA node 0 PCI segments 0- 3: pci_thunder_ecam_ops (MCFG quirk)
NUMA node 0 PCI segments 4- 9: thunder_pem_ecam_ops (MCFG quirk)
NUMA node 1 PCI segments 10-13: pci_thunder_ecam_ops (MCFG quirk)
NUMA node 1 PCI segments 14-19: thunder_pem_ecam_ops (MCFG quirk)[bhelgaas: change Makefile/ifdefs so quirk doesn't depend on
CONFIG_PCI_HOST_THUNDER_ECAM]
Signed-off-by: Tomasz Nowicki
Signed-off-by: Bjorn Helgaas -
ThunderX PCIe controller to off-chip devices (so-called PEM) is not fully
compliant with ECAM standard. It uses non-standard configuration space
accessors (see thunder_pem_ecam_ops) and custom configuration space
granulation (see bus_shift = 24). In order to access configuration space
and probe PEM as ACPI-based PCI host controller we need to add MCFG quirk
infrastructure. This involves:
1. A new thunder_pem_acpi_init() init function to locate PEM-specific
register ranges using ACPI.
2. Export PEM thunder_pem_ecam_ops structure so it is visible to MCFG quirk
code.
3. New quirk entries for each PEM segment. Each contains platform IDs,
mentioned thunder_pem_ecam_ops and CFG resources.Quirk is considered for ThunderX silicon pass2.x only which is identified
via MCFG revision 1.ThunderX pass 2.x requires the following accessors:
NUMA Node 0 PCI segments 0- 3: pci_generic_ecam_ops (ECAM-compliant)
NUMA Node 0 PCI segments 4- 9: thunder_pem_ecam_ops (MCFG quirk)
NUMA Node 1 PCI segments 10-13: pci_generic_ecam_ops (ECAM-compliant)
NUMA Node 1 PCI segments 14-19: thunder_pem_ecam_ops (MCFG quirk)[bhelgaas: adapt to use acpi_get_rc_resources(), update Makefile/ifdefs so
quirk doesn't depend on CONFIG_PCI_HOST_THUNDER_PEM]
Signed-off-by: Tomasz Nowicki
Signed-off-by: Bjorn Helgaas -
The PCIe controller in Hip05/Hip06/Hip07 SoCs is not completely
ECAM-compliant. It is non-ECAM only for the RC bus config space; for any
other bus underneath the root bus it does support ECAM access.Add specific quirks for PCI config space accessors. This involves:
1. New initialization call hisi_pcie_init() to obtain RC base
addresses from PNP0C02 at the root of the ACPI namespace (under \_SB).
2. New entry in common quirk array.[bhelgaas: move to pcie-hisi.c and change Makefile/ifdefs so quirk doesn't
depend on CONFIG_PCI_HISI]
Signed-off-by: Dongdong Liu
Signed-off-by: Gabriele Paoloni
Signed-off-by: Bjorn Helgaas -
The Qualcomm Technologies QDF2432 SoC does not support accesses smaller
than 32 bits to the PCI configuration space. Register the appropriate
quirk.[bhelgaas: add QCOM_ECAM32 macro, ifdef for ACPI and PCI_QUIRKS]
Signed-off-by: Christopher Covington
Signed-off-by: Bjorn Helgaas
11 Jun, 2016
2 commits
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Add a parent device field to struct pci_config_window. The parent is not
saved now, but will be useful to save it in some cases. For ACPI on ARM64,
it can be used to setup ACPI companion and domain.Since the parent dev is in struct pci_config_window now, we need not pass
it to the init function as a separate argument.Signed-off-by: Jayachandran C
Signed-off-by: Bjorn Helgaas
Acked-by: Lorenzo Pieralisi -
This header will be used from arch/arm64 for ACPI PCI implementation so it
needs to be moved out of drivers/pci.Update users of the header file to use the new name. No functional
changes.Signed-off-by: Jayachandran C
Signed-off-by: Bjorn Helgaas
Acked-by: Lorenzo Pieralisi
