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* pci/enumeration:
PCI: Include PCI-to-PCIe bridges as "Downstream Ports"
PCI: Improve __pci_read_base() robustness
PCI: Short-circuit pci_device_is_present() for disconnected devices
PCI/MSI: Skip disabling disconnected devices
PCI: Don't attempt config access to disconnected devices
PCI: Add device disconnected state
PCI: Export PCI device config accessors
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* pci/switchtec:
switchtec: Add IOCTLs to the Switchtec driver
switchtec: Add sysfs attributes to the Switchtec driver
switchtec: Add user interface documentation
MicroSemi Switchtec management interface driver
Conflicts:
drivers/pci/Kconfig
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* pci/host-thunder:
PCI/ACPI: Add ThunderX pass2.x 2nd node MCFG quirk
PCI/ACPI: Tidy up MCFG quirk whitespace
PCI: Avoid generating invalid ThunderX2 DMA aliases
PCI: Add device flag PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT
PCI: Apply Cavium ACS quirk only to CN81xx/CN83xx/CN88xx devices
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* pci/host-rockchip:
PCI: rockchip: Modularize
PCI: Export pci_remap_iospace() and pci_unmap_iospace()
PCI: rockchip: Add remove() support
PCI: rockchip: Set PCI_EXP_LNKSTA_SLC in the Root Port
PCI: rockchip: Advertise 128-byte Read Completion Boundary support
PCI: rockchip: Make 'return 0' more obvious in probe()
PCI: rockchip: Unindent rockchip_pcie_set_power_limit()
PCI: rockchip: Handle regulator_get_current_limit() failure correctly
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* pci/host-mvebu:
PCI: mvebu: Avoid changing the SCC bit in the Link Status register
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* pci/host-iproc:
PCI: iproc: Add PCI_DOMAIN dependency to PCI Kconfig
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* pci/host-imx6:
PCI: imx6: Fix spelling mistake: "contol" -> "control"
PCI: imx6: Do not switch speed if Gen2 is disabled
PCI: imx6: Do not wait for speed change on i.MX7
PCI: imx6: Allow probe deferral by reset GPIO
PCI: imx6: Add code to support i.MX7D
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* pci/host-hv:
PCI: hv: Convert hv_pci_dev.refs from atomic_t to refcount_t
PCI: hv: Allocate interrupt descriptors with GFP_ATOMIC
PCI: hv: Specify CPU_AFFINITY_ALL for MSI affinity when >= 32 CPUs
PCI: hv: Lock PCI bus on device eject
PCI: hv: Properly handle PCI bus remove
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* pci/host-faraday:
PCI: faraday: Add Faraday Technology FTPCI100 PCI Host Bridge driver
PCI: Add DT bindings for Faraday Technology PCI Host Bridge
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* pci/host-designware:
ARM: DRA7: clockdomain: Change the CLKTRCTRL of CM_PCIE_CLKSTCTRL to SW_WKUP
MAINTAINERS: Add PCI Endpoint maintainer
Documentation: PCI: Add userguide for PCI endpoint test function
tools: PCI: Add sample test script to invoke pcitest
tools: PCI: Add a userspace tool to test PCI endpoint
Documentation: misc-devices: Add Documentation for pci-endpoint-test driver
misc: Add host side PCI driver for PCI test function device
PCI: Add device IDs for DRA74x and DRA72x
dt-bindings: PCI: dra7xx: Add DT bindings to enable unaligned access
PCI: dwc: dra7xx: Workaround for errata id i870
dt-bindings: PCI: dra7xx: Add DT bindings for PCI dra7xx EP mode
PCI: dwc: dra7xx: Add EP mode support
PCI: dwc: dra7xx: Facilitate wrapper and MSI interrupts to be enabled independently
dt-bindings: PCI: Add DT bindings for PCI designware EP mode
PCI: dwc: designware: Add EP mode support
Documentation: PCI: Add binding documentation for pci-test endpoint function
PCI: endpoint: functions: Add an EP function to test PCI
Documentation: PCI: Add specification for the *PCI test* function device
PCI: endpoint: Create configfs entry for EPC device and EPF driver
Documentation: PCI: Guide to use PCI endpoint configfs
PCI: endpoint: Introduce configfs entry for configuring EP functions
Documentation: PCI: Guide to use PCI Endpoint Core Layer
PCI: endpoint: Add EP core layer to enable EP controller and EP functions
PCI: dwc: dra7xx: Push request_irq() call to the bottom of probe
PCI: dwc: designware: Move _unroll configurations to a separate function
PCI: dwc: all: Modify dbi accessors to access data of 4/2/1 bytes
PCI: dwc: all: Modify dbi accessors to take dbi_base as argument
PCI: dwc: artpec6: Populate cpu_addr_fixup ops
PCI: dwc: dra7xx: Populate cpu_addr_fixup ops
PCI: dwc: designware: Add new *ops* for CPU addr fixup
PCI: dwc: Fix uninitialized variable in dw_handle_msi_irq()
PCI: dwc: Unindent dw_handle_msi_irq() loop
PCI: dwc: Fix dw_pcie_ops NULL pointer dereference
PCI: dwc: Select PCI_HOST_COMMON for hisi
PCI: thunder-pem: Fix legacy firmware PEM-specific resources
PCI: thunder-pem: Add legacy firmware support for Cavium ThunderX host controller
PCI: thunder-pem: Use Cavium assigned hardware ID for ThunderX host controller
PCI: iproc: Save host bridge window resource in struct iproc_pcie
PCI/ASPM: Always set link->downstream to avoid NULL dereference on remove
PCI: Prevent VPD access for QLogic ISP2722
PCI: exynos: Initialize elbi_base even when using PHY framework
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The PCIe programming sequence in TRM suggests CLKSTCTRL of PCIe should be
set to SW_WKUP. There are no issues when CLKSTCTRL is set to HW_AUTO in RC
mode. However in EP mode, the host system is not able to access the
MEMSPACE and setting the CLKSTCTRL to SW_WKUP fixes it.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add maintainer for the newly introduced PCI Endpoint framework.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add documentation to help users use pci-epf-test function driver and
pci_endpoint_test host driver for testing PCI.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add a simple test script that invokes the pcitest userspace tool to perform
all the PCI endpoint tests (BAR tests, interrupt tests, read tests, write
tests and copy tests).
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add a userspace tool to invoke the ioctls exposed by the PCI endpoint test
driver to perform various PCI tests.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add Documentation for pci-endpoint-test driver.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add PCI endpoint test driver that can verify base address register, legacy
interrupt/MSI interrupt and read/write/copy buffers between host and
device. The corresponding pci-epf-test function driver should be used on
the EP side.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add device IDs for DRA74x and DRA72x devices. These devices have
configurable PCI endpoint.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Update device tree binding documentation of TI's dra7xx PCI controller to
include property for enabling unaligned mem access.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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According to errata i870, access to the PCIe slave port that are not 32-bit
aligned will result in incorrect mapping to TLP Address and Byte enable
fields.
Accessing non 32-bit aligned data causes incorrect data in the target
buffer if memcpy is used. Implement the workaround for this errata here.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add device tree binding documentation for PCI dra7xx EP mode.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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The PCIe controller integrated in dra7xx SoCs is capable of operating in
endpoint mode. Add endpoint mode support to dra7xx driver.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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independently
No functional change. Split dra7xx_pcie_enable_interrupts() into
dra7xx_pcie_enable_wrapper_interrupts() and
dra7xx_pcie_enable_msi_interrupts() so that wrapper interrupts and MSI
interrupts can be enabled independently. This is in preparation for adding
EP mode support to dra7xx driver since EP mode doesn't have to enable
msi_interrupts.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add device tree binding documentation for PCI designware EP mode.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rob Herring <robh@kernel.org>
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Add endpoint mode support to designware driver. This uses the EP Core layer
introduced recently to add endpoint mode support. *Any* function driver
can now use this designware device in order to achieve the EP
functionality.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add binding documentation for pci-test endpoint function that helps in
adding and configuring pci-test endpoint function.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Trivial fix to spelling mistake in dev_err message
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Richard Zhu <hongxing.Zhu@nxp.com>
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Currently SoCs pass2.x do not emulate EA headers for ACPI boot method at
all. However, for pass2.x some devices (like EDAC) advertise incorrect
base addresses in their BARs which results in driver probe failure during
resource request. Since all problematic blocks are on 2nd NUMA node under
domain 10 add necessary quirk entry to obtain BAR addresses correction
using EA header emulation.
Fixes: 44f22bd91e88 ("PCI: Add MCFG quirks for Cavium ThunderX pass2.x host controller")
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Robert Richter <rrichter@cavium.com>
CC: stable@vger.kernel.org # v4.10+
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With no blank lines, it's not obvious where the macro definitions end and
the uses begin. Add some blank lines and reorder the ThunderX definitions.
No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v4.10+
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Now that we've exported pci_remap_iospace() and added proper remove()
support, there's no reason this can't be a loadable module.
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Lin <shawn.lin@rock-chips.com>
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These are useful for PCIe host drivers, and those drivers can be modules.
[bhelgaas: don't remove __weak; it's removed elsewhere]
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Lin <shawn.lin@rock-chips.com>
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Currently, if we try to unbind the platform device, the remove will
succeed, but the removal won't undo most of the registration, leaving
partially-configured PCI devices in the system.
This allows, for example, a simple 'lspci' to crash the system, as it will
try to touch the freed (via devm_*) driver structures, e.g., on RK3399:
# echo f8000000.pcie > /sys/bus/platform/drivers/rockchip-pcie/unbind
# lspci
So let's implement device remove().
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Lin <shawn.lin@rock-chips.com>
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A PCI/PCI-X to PCI Express bridge, sometimes referred to as a "reverse
bridge", is a bridge with conventional PCI or PCI-X on its primary side and
a PCI Express Port on its secondary (downstream) side.
That PCIe Port is a Downstream Port and could be connected to a slot, just
like a Root Port or a Switch Downstream Port. Make pcie_downstream_port()
return true for them, so we can access the Slot registers in the PCIe
capability.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Local variables 'l' and 'sz' are uninitialized. Normally, they would
be initialized by pci_read_config_dword() but when an error occurs,
some drivers immediately return an error code, which leaves the
argument uninitialized.
Provide a safe initial value to make the code more robust.
Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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refcount_t type and corresponding API should be used instead of atomic_t
when the variable is used as a reference counter. This allows to avoid
accidental refcounter overflows that might lead to use-after-free
situations.
Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com>
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On Cavium ThunderX2 arm64 SoCs (formerly known as Broadcom Vulcan), the PCI
topology is slightly unusual. For a multi-node system, it looks like:
00:00.0 PCI bridge to [bus 01-1e]
01:0a.0 PCI-to-PCIe bridge to [bus 02-04]
02:00.0 PCIe Root Port bridge to [bus 03-04] (XLATE_ROOT)
03:00.0 PCIe Endpoint
pci_for_each_dma_alias() assumes IOMMU translation is done at the root of
the PCI hierarchy. It generates 03:00.0, 01:0a.0, and 00:00.0 as DMA
aliases for 03:00.0 because buses 01 and 00 are non-PCIe buses that don't
carry the Requester ID.
Because the ThunderX2 IOMMU is at 02:00.0, the Requester IDs 01:0a.0 and
00:00.0 are never valid for the endpoint. This quirk stops alias
generation at the XLATE_ROOT bridge so we won't generate 01:0a.0 or
00:00.0.
The current IOMMU code only maps the last alias (this is a separate bug in
itself). Prior to this quirk, we only created IOMMU mappings for the
invalid Requester ID 00:00:0, which never matched any DMA transactions.
With this quirk, we create IOMMU mappings for a valid Requester ID, which
fixes devices with no aliases but leaves devices with aliases still broken.
The last alias for the endpoint is also used by the ARM GICv3 MSI-X code.
Without this quirk, the GIC Interrupt Translation Tables are setup with the
invalid Requester ID, and the MSI-X generated by the device fails to be
translated and routed.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=195447
Signed-off-by: Jayachandran C <jnair@caviumnetworks.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: David Daney <david.daney@cavium.com>
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Add a new quirk flag PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT to limit the DMA alias
search to go no further than the bridge where the IOMMU unit is attached.
The flag will be used to indicate a bridge device which forwards the
address translation requests to the IOMMU, i.e., where the interrupt and
DMA requests leave the PCIe hierarchy and go into the system blocks.
Usually this happens at the PCI RC, so this flag is not needed. But on
systems where there are bridges that introduce aliases above the IOMMU,
this flag prevents pci_for_each_dma_alias() from generating aliases that
the IOMMU will never see.
The function pci_for_each_dma_alias() is updated to stop when it see a
bridge with this flag set.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=195447
Signed-off-by: Jayachandran C <jnair@caviumnetworks.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: David Daney <david.daney@cavium.com>
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Add a couple of special IOCTLs to:
* Inform userspace of firmware partition locations
* Pass event counts and allow userspace to wait on events
* Translate PFF numbers used by the switch to port numbers
[Dan Carpenter <dan.carpenter@oracle.com>: fix off-by-one in
ioctl_event_ctl()]
Tested-by: Krishna Dhulipala <krishnad@fb.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Stephen Bates <stephen.bates@microsemi.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Wei Zhang <wzhang@fb.com>
Reviewed-by: Jens Axboe <axboe@fb.com>
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Add a few read-only sysfs attributes which provide some device information
that is exposed from the devices, primarily component and device names and
versions.
These are documented in Documentation/ABI/testing/sysfs-class-switchtec.
Tested-by: Krishna Dhulipala <krishnad@fb.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Stephen Bates <stephen.bates@microsemi.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Wei Zhang <wzhang@fb.com>
Reviewed-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add standard documentation for the sysfs switchtec attributes and a RST
formatted text file which documents the char device interface. Jonathan
Corbet has indicated he will move this to a new user-space developer
documentation book once it's created.
Tested-by: Krishna Dhulipala <krishnad@fb.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Stephen Bates <stephen.bates@microsemi.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Wei Zhang <wzhang@fb.com>
Reviewed-by: Jens Axboe <axboe@fb.com>
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All platforms using Rockchip use a common clock for the Root Port and the
slot connected to it. Indicate this by setting the Slot Clock Configuration
(PCI_EXP_LNKSTA_SLC) bit in the Root Port's Link Status.
Per the Implementation Note in the spec (PCIe r3.1, sec 7.8.7), if the
downstream component also sets PCI_EXP_LNKSTA_SLC, software may set the
Common Clock Configuration (PCI_EXP_LNKCTL_CCC) bits on both ends of the
Link. This is done by pcie_aspm_configure_common_clock().
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Cc: Brian Norris <briannorris@chromium.org>
Cc: jeffy.chen <jeffy.chen@rock-chips.com>
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Adds a new endpoint function driver (to program the virtual test device)
making use of the EP-core library.
[bhelgaas: fold in pci_epf_test_probe() -ENOMEM test from Wei Yongjun
<weiyongjun1@huawei.com>]
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add specification for the *PCI test* virtual function device. The endpoint
function driver and the host PCI driver should be created based on this
specification.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Invoke APIs provided by pci-ep-cfs to create configfs entry for every EPC
device and EPF driver to help users in creating EPF device and binding the
EPF device to the EPC device.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add Documentation to help users use PCI endpoint to configure PCI endpoint
function and to bind the endpoint function with endpoint controller.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-By: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Introduce a new configfs entry to configure the EP function (like
configuring the standard configuration header entries) and to bind the EP
function with EP controller.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add Documentation to help users use endpoint library to enable endpoint
mode in the PCI controller and add new PCI endpoint functions.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-By: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Introduce a new EP core layer in order to support endpoint functions in
linux kernel. This comprises the EPC library (Endpoint Controller Library)
and EPF library (Endpoint Function Library). EPC library implements
functions specific to an endpoint controller and EPF library implements
functions specific to an endpoint function.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Save a bit of time and avoid going through link speed change procedure in
configuration where link max speed is limited to Gen1 in DT.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Cc: yurovsky@gmail.com
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Dong Aisheng <dongas86@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
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As can be seen from [1]:
"...the different behavior between iMX6Q PCIe and iMX7D PCIe maybe caused
by the different controller version.
Regarding to the DOC description, the DIRECT_SPEED_CHANGE should be
cleared after the speed change from GEN1 to GEN2. Unfortunately, when
GEN1 device is used, the behavior is not documented.
So, IC design guys run the simulation and find out the following
behaviors:
1. DIRECT_SPEED_CHANGE will be cleared in 7D after speed change
from GEN1 to GEN2. This matches doc’s description
2. set MAX link speed(PCIE_CAP_TARGET_LINK_SPEED=0x01) as GEN1 and
re-run the simulation, DIRECT_SPEED_CHANGE will not be cleared;
remain as 1, this matches your result, but function test is
passed, so this bit should not affect the normal PCIe function."
imx6_pcie_wait_for_speed_change() will report false failures for Gen1 ->
Gen1 speed transition, so avoid doing that check and just rely on
imx6_pcie_wait_for_link() only.
[1] https://community.nxp.com/message/867943
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Cc: yurovsky@gmail.com
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Dong Aisheng <dongas86@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
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