| Age | Commit message (Collapse) | Author |
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- Move DBI accesses from dw_pcie_ep_init() to dw_pcie_ep_init_complete() so
drivers for endpoints that require Refclk for DBI access, e.g., qcom and
tegra194, can control when this happens (Manivannan Sadhasivam)
- Add endpoint API kernel-doc (Manivannan Sadhasivam)
- Remove .deinit() callback and instead call rcar_gen4_pcie_ep_deinit()
explicitly from rcar-gen4, which was the only user (Manivannan
Sadhasivam)
- Rename dw_pcie_ep_exit() to dw_pcie_ep_deinit() to correspond with
dw_pcie_ep_init() (Manivannan Sadhasivam)
- Add dw_pcie_ep_cleanup() for drivers that need to clean up eDMA resources
when PERST# is asserted, e.g., qcom, tegra194 (Manivannan Sadhasivam)
- Rename dw_pcie_ep_init_complete() to dw_pcie_ep_init_registers() to
better reflect the functionality (Manivannan Sadhasivam)
- Call dw_pcie_ep_init_registers() directly from drivers instead of from
dw_pcie_ep_init() so drivers, e.g., qcom and tegra194, can do it when
Refclk is available (Manivannan Sadhasivam)
- Remove the "core_init_notifier" flag, which previously identified drivers
that required Refclk before DBI access, because it's now unnecessary
(Manivannan Sadhasivam)
* pci/controller/dwc:
PCI: endpoint: Remove "core_init_notifier" flag
PCI: dwc: ep: Call dw_pcie_ep_init_registers() API directly from all glue drivers
PCI: dwc: ep: Rename dw_pcie_ep_init_complete() to dw_pcie_ep_init_registers()
PCI: dwc: ep: Introduce dw_pcie_ep_cleanup() API for drivers supporting PERST#
PCI: dwc: ep: Rename dw_pcie_ep_exit() to dw_pcie_ep_deinit()
PCI: dwc: ep: Remove deinit() callback from struct dw_pcie_ep_ops
PCI: dwc: ep: Add Kernel-doc comments for APIs
PCI: dwc: ep: Fix DBI access failure for drivers requiring refclk from host
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"core_init_notifier" flag is set by the glue drivers requiring refclk from
the host to complete the DWC core initialization. Also, those drivers will
send a notification to the EPF drivers once the initialization is fully
completed using the pci_epc_init_notify() API. Only then, the EPF drivers
will start functioning.
For the rest of the drivers generating refclk locally, EPF drivers will
start functioning post binding with them. EPF drivers rely on the
'core_init_notifier' flag to differentiate between the drivers.
Unfortunately, this creates two different flows for the EPF drivers.
So to avoid that, let's get rid of the "core_init_notifier" flag and follow
a single initialization flow for the EPF drivers. This is done by calling
the dw_pcie_ep_init_notify() from all glue drivers after the completion of
dw_pcie_ep_init_registers() API. This will allow all the glue drivers to
send the notification to the EPF drivers once the initialization is fully
completed.
Only difference here is that, the drivers requiring refclk from host will
send the notification once refclk is received, while others will send it
during probe time itself.
But this also requires the EPC core driver to deliver the notification
after EPF driver bind. Because, the glue driver can send the notification
before the EPF drivers bind() and in those cases the EPF drivers will miss
the event. To accommodate this, EPC core is now caching the state of the
EPC initialization in 'init_complete' flag and pci-ep-cfs driver sends the
notification to EPF drivers based on that after each EPF driver bind.
Link: https://lore.kernel.org/linux-pci/20240327-pci-dbi-rework-v12-8-082625472414@linaro.org
Tested-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
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Ever since commit f25b5fae29d4 ("PCI: endpoint: Setting a BAR size > 4 GB
is invalid if 64-bit flag is not set") it has been impossible to get the
.set_bar() callback with a BAR size > 2 GB (yes, 2GB!), if the BAR was
also not requested to be configured as a 64-bit BAR.
Thus, forcing setting the 64-bit flag for BARs larger than 2 GB in the
lower level driver is dead code and can be removed.
It is however possible that an EPF driver configures a BAR as 64-bit,
even if the requested size is < 4 GB.
Respect the requested BAR configuration, just like how it is already
respected with regards to the prefetchable bit.
Link: https://lore.kernel.org/linux-pci/20240320113157.322695-7-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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Next Function Number field in ARI Capability Register for last function
must be zero by default as per the PCIe specification, indicating there
is no next higher number function but that's not happening in our case,
so this patch clears the Next Function Number field for last function
used.
[kwilczynski: white spaces update for one define]
Link: https://lore.kernel.org/linux-pci/20231202085015.3048516-1-s-vadapalli@ti.com
Signed-off-by: Jasko-EXT Wojciech <wojciech.jasko-EXT@continental-corporation.com>
Signed-off-by: Achal Verma <a-verma1@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
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In the Cadence endpoint controller driver, rename the function
cdns_pcie_ep_send_legacy_irq() to cdns_pcie_ep_send_intx_irq() to match
the macro PCI_IRQ_INTX name. Related comments and messages mentioning
"legacy" are also changed to refer to "intx".
Link: https://lore.kernel.org/r/20231122060406.14695-9-dlemoal@kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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linux/pci.h defines the IRQ flags PCI_IRQ_INTX, PCI_IRQ_MSI and
PCI_IRQ_MSIX. Let's use these flags directly instead of the endpoint
definitions provided by enum pci_epc_irq_type. This removes the need
for defining this enum type completely.
Link: https://lore.kernel.org/r/20231122060406.14695-3-dlemoal@kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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Convert open-coded variants of PCI field access into FIELD_GET() to
make the code easier to understand.
Link: https://lore.kernel.org/r/20231018113254.17616-2-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Clear FLR (Function Level Reset) from device capabilities
registers for all physical functions.
During FLR, the Margining Lane Status and Margining Lane Control
registers should not be reset, as per PCIe specification.
However, the controller incorrectly resets these registers upon FLR.
This causes PCISIG compliance FLR test to fail. Hence preventing
all functions from advertising FLR support if flag quirk_disable_flr
is set.
Link: https://lore.kernel.org/r/1635165075-89864-1-git-send-email-pthombar@cadence.com
Signed-off-by: Parshuram Thombare <pthombar@cadence.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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The ep->ob_region_map bitmap is a long and it has BITS_PER_LONG bits.
Link: https://lore.kernel.org/r/20220315065829.GA13572@kili
Fixes: 37dddf14f1ae ("PCI: cadence: Add EndPoint Controller driver for Cadence PCIe controller")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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- Add max-virtual-functions to endpoint binding (Kishon Vijay Abraham I)
- Add pci_epf_add_vepf() API to add virtual function to endpoint (Kishon
Vijay Abraham I)
- Add pci_epf_vepf_link() to link virtual function to endpoint physical
function (Kishon Vijay Abraham I)
- Add virtual function number to pci_epc_ops endpoint ops interfaces
(Kishon Vijay Abraham I)
- Simplify register base address computation for endpoint BAR configuration
(Kishon Vijay Abraham I)
- Add support to configure virtual functions in cadence endpoint driver
(Kishon Vijay Abraham I)
- Add SR-IOV configuration to endpoint test driver (Kishon Vijay Abraham I)
- Document configfs usage to create virtual functions for endpoints (Kishon
Vijay Abraham I)
* remotes/lorenzo/pci/endpoint:
Documentation: PCI: endpoint/pci-endpoint-cfs: Guide to use SR-IOV
misc: pci_endpoint_test: Populate sriov_configure ops to configure SR-IOV device
PCI: cadence: Add support to configure virtual functions
PCI: cadence: Simplify code to get register base address for configuring BAR
PCI: endpoint: Add virtual function number in pci_epc ops
PCI: endpoint: Add support to link a physical function to a virtual function
PCI: endpoint: Add support to add virtual function in endpoint core
dt-bindings: PCI: pci-ep: Add binding to specify virtual function
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PCIe fails to link up if SERDES lanes not used by PCIe are assigned to
another protocol. For example, link training fails if lanes 2 and 3 are
assigned to another protocol while lanes 0 and 1 are used for PCIe to
form a two lane link. This failure is due to an incorrect tie-off on an
internal status signal indicating electrical idle.
Status signals going from SERDES to PCIe Controller are tied-off when a
lane is not assigned to PCIe. Signal indicating electrical idle is
incorrectly tied-off to a state that indicates non-idle. As a result,
PCIe sees unused lanes to be out of electrical idle and this causes
LTSSM to exit Detect.Quiet state without waiting for 12ms timeout to
occur. If a receiver is not detected on the first receiver detection
attempt in Detect.Active state, LTSSM goes back to Detect.Quiet and
again moves forward to Detect.Active state without waiting for 12ms as
required by PCIe base specification. Since wait time in Detect.Quiet is
skipped, multiple receiver detect operations are performed back-to-back
without allowing time for capacitance on the transmit lines to
discharge. This causes subsequent receiver detection to always fail even
if a receiver gets connected eventually.
Add a quirk flag "quirk_detect_quiet_flag" to program the minimum
time the LTSSM should wait on entering Detect.Quiet state here.
This has to be set for J7200 as it has an incorrect tie-off on unused
lanes.
Link: https://lore.kernel.org/r/20210811123336.31357-3-kishon@ti.com
Signed-off-by: Nadeem Athani <nadeem@cadence.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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Now that support for SR-IOV is added in PCIe endpoint core, add support
to configure virtual functions in the Cadence PCIe EP driver.
Link: https://lore.kernel.org/r/20210819123343.1951-7-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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No functional change. Simplify code to get register base address for
configuring PCI BAR.
Link: https://lore.kernel.org/r/20210819123343.1951-6-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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Add virtual function number in pci_epc ops. EPC controller driver
can perform virtual function specific initialization based on the
virtual function number.
Link: https://lore.kernel.org/r/20210819123343.1951-5-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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The number of functions supported by the endpoint controller is configured
in LM_EP_FUNC_CFG based on func_no member of struct pci_epf. Now that an
endpoint function can be associated with two endpoint controllers (primary
and secondary), just using func_no will not suffice as that will take into
account only if the endpoint controller is associated with the primary
interface of endpoint function. Instead use epc->function_num_map which
will already have the configured functions information (irrespective of
whether the endpoint controller is associated with primary or secondary
interface).
Link: https://lore.kernel.org/r/20210201195809.7342-13-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tom Joseph <tjoseph@cadence.com>
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Implement ->msi_map_irq() ops in order to map physical address to MSI
address and return MSI data.
Link: https://lore.kernel.org/r/20210201195809.7342-12-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tom Joseph <tjoseph@cadence.com>
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Now that "cdns,max-outbound-regions" is made an optional property, do
not error out if "cdns,max-outbound-regions" device tree property is
not found.
Link: http://lore.kernel.org/r/20201105165331.GA55814@bogus
Link: https://lore.kernel.org/r/20201106151107.3987-3-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
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This comment still refers to the old driver pathname,
when all PCI drivers were located directly under the
drivers/pci directory.
Anyway the function name itself is enough, so we can
remove the overabundant path reference.
Link: https://lore.kernel.org/r/20200623074851.7832-1-f.suligoi@asem.it
Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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- Use pci_host_bridge.windows list directly instead of splicing in a
temporary list for cadence, mvebu, host-common (Rob Herring)
- Use pci_host_probe() instead of open-coding all the pieces for altera,
brcmstb, iproc, mobiveil, rcar, rockchip, tegra, v3, versatile, xgene,
xilinx, xilinx-nwl (Rob Herring)
- Convert to devm_platform_ioremap_resource_byname() instead of open-coding
platform_get_resource_byname() and devm_ioremap_resource() for altera,
cadence, mediatek, rockchip, tegra, xgene (Dejin Zheng)
- Convert to devm_platform_ioremap_resource() instead of open-coding
platform_get_resource() and devm_ioremap_resource() for aardvark,
brcmstb, exynos, ftpci100, versatile (Dejin Zheng)
- Remove redundant error messages from devm_pci_remap_cfg_resource()
callers (Dejin Zheng)
- Drop useless PCI_ENABLE_PROC_DOMAINS from versatile driver (Rob Herring)
- Default host bridge parent device to the platform device (Rob Herring)
- Drop unnecessary zeroing of host bridge fields (Rob Herring)
- Use pci_is_root_bus() instead of tracking root bus number separately in
aardvark, designware (imx6, keystone, designware-host), mobiveil,
xilinx-nwl, xilinx, rockchip, rcar (Rob Herring)
- Set host bridge bus number in pci_scan_root_bus_bridge() instead of each
driver for aardvark, designware-host, host-common, mediatek, rcar, tegra,
v3-semi (Rob Herring)
- Use bridge resources instead of parsing DT 'ranges' again for cadence
(Rob Herring)
- Remove private bus number and range from cadence (Rob Herring)
- Use devm_pci_alloc_host_bridge() to simplify rcar (Rob Herring)
- Use struct pci_host_bridge.windows list directly rather than a temporary
(Rob Herring)
- Reduce OF "missing non-prefetchable window" from error to warning message
(Rob Herring)
- Convert rcar-gen2 from old Arm-specific pci_common_init_dev() to new
arch-independent interfaces (Rob Herring)
- Move DT resource setup into devm_pci_alloc_host_bridge() (Rob Herring)
- Set bridge map_irq and swizzle_irq to default functions; drivers that
don't support legacy IRQs (iproc) need to undo this (Rob Herring)
* pci/host-probe-refactor:
PCI: Set bridge map_irq and swizzle_irq to default functions
PCI: Move DT resource setup into devm_pci_alloc_host_bridge()
PCI: rcar-gen2: Convert to use modern host bridge probe functions
PCI: of: Reduce missing non-prefetchable memory region to a warning
PCI: rcar: Use struct pci_host_bridge.windows list directly
PCI: rcar: Use devm_pci_alloc_host_bridge()
PCI: cadence: Remove private bus number and range storage
PCI: cadence: Use bridge resources for outbound window setup
PCI: Move setting pci_host_bridge.busnr out of host drivers
PCI: rcar: Use pci_is_root_bus() to check if bus is root bus
PCI: rockchip: Use pci_is_root_bus() to check if bus is root bus
PCI: xilinx: Use pci_is_root_bus() to check if bus is root bus
PCI: xilinx-nwl: Use pci_is_root_bus() to check if bus is root bus
PCI: mobiveil: Use pci_is_root_bus() to check if bus is root bus
PCI: designware: Use pci_is_root_bus() to check if bus is root bus
PCI: aardvark: Use pci_is_root_bus() to check if bus is root bus
PCI: Drop unnecessary zeroing of bridge fields
PCI: Set default bridge parent device
PCI: versatile: Drop flag PCI_ENABLE_PROC_DOMAINS
PCI: controller: Remove duplicate error message
PCI: controller: Convert to devm_platform_ioremap_resource()
PCI: controller: Convert to devm_platform_ioremap_resource_byname()
PCI: xilinx: Use pci_host_probe() to register host
PCI: xilinx-nwl: Use pci_host_probe() to register host
PCI: rockchip: Use pci_host_probe() to register host
PCI: rcar: Use pci_host_probe() to register host
PCI: iproc: Use pci_host_probe() to register host
PCI: altera: Use pci_host_probe() to register host
PCI: xgene: Use pci_host_probe() to register host
PCI: versatile: Use pci_host_probe() to register host
PCI: v3: Use pci_host_probe() to register host
PCI: tegra: Use pci_host_probe() to register host
PCI: mobiveil: Use pci_host_probe() to register host
PCI: brcmstb: Use pci_host_probe() to register host
PCI: host-common: Use struct pci_host_bridge.windows list directly
PCI: mvebu: Use struct pci_host_bridge.windows list directly
PCI: cadence: Use struct pci_host_bridge.windows list directly
# Conflicts:
# drivers/pci/controller/cadence/pcie-cadence-host.c
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Implement ->set_msix() and ->get_msix() callback functions in order
to configure MSIX capability in the PCIe endpoint controller.
Add cdns_pcie_ep_send_msix_irq() to send MSIX interrupts to Host.
cdns_pcie_ep_send_msix_irq() gets the MSIX table address (virtual
address) from "struct cdns_pcie_epf" that gets initialized in
->set_bar() call back function.
[kishon@ti.com: Re-implement MSIX support in accordance with the
re-designed core MSI-X interfaces]
Link: https://lore.kernel.org/r/20200722110317.4744-11-kishon@ti.com
Signed-off-by: Alan Douglas <adouglas@cadence.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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Add cdns_pcie_ops to start link and verify link status. The registers
to start link and to check link status is in Platform specific PCIe
wrapper. Add support for platform specific drivers to add callback
functions for the PCIe Cadence core to start link and verify link status.
Link: https://lore.kernel.org/r/20200722110317.4744-6-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
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Certain platforms like TI's J721E using Cadence PCIe IP can perform only
32-bit accesses for reading or writing to Cadence registers. Convert all
read and write accesses to 32-bit in Cadence PCIe driver in preparation
for adding PCIe support in TI's J721E SoC.
Also add spin lock to disable interrupts while modifying PCI_STATUS
register while raising legacy interrupt since PCI_STATUS is accessible
by both remote RC and EP and time between read and write should be
minimized.
Link: https://lore.kernel.org/r/20200722110317.4744-5-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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commit bd22885aa188 ("PCI: cadence: Refactor driver to use as a core
library") while refactoring the Cadence PCIe driver to be used as
library, removed pm_runtime_get_sync() from cdns_pcie_ep_setup()
and cdns_pcie_host_setup() but missed to remove the corresponding
pm_runtime_put_sync() in the error path. Fix it here.
Link: https://lore.kernel.org/r/20200722110317.4744-3-kishon@ti.com
Fixes: bd22885aa188 ("PCI: cadence: Refactor driver to use as a core library")
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
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There's no need to store the bus number or range resource as the driver
only needs the bus number which is already in the pci_host_bridge.
For endpoint mode, the bus number is always 0.
Link: https://lore.kernel.org/r/20200722022514.1283916-14-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Tom Joseph <tjoseph@cadence.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
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Use devm_platform_ioremap_resource_byname() to simplify the code,
since it calls respectively platform_get_resource_byname() and
devm_ioremap_resource().
Link: https://lore.kernel.org/r/20200602171601.17630-1-zhengdejin5@gmail.com
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
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pci_epc_mem_init() internally used page size equal to *PAGE_SIZE* to
manage the address space so instead just pass the page size as a
argument to pci_epc_mem_init().
Also make pci_epc_mem_init() as a C function instead of a macro function
in preparation for adding support for pci-epc-mem core to handle multiple
windows.
Link: https://lore.kernel.org/r/1588854799-13710-5-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
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Cadence core library files may be used by various platform drivers.
Add a new directory "cadence" to group all the Cadence core library files
and the platforms using Cadence core library.
Signed-off-by: Tom Joseph <tjoseph@cadence.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
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