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17 Commits

Author SHA1 Message Date
Bjorn Helgaas
6f119ec8d9 Merge branch 'pci/irq-error' 
- Remove redundant logging for platform_get_irq() errors (Krzysztof
  Wilczyński)

* pci/irq-error:
  PCI: Remove dev_err() when handing an error from platform_get_irq()
 2020-08-05 18:24:22 -05:00
Rob Herring
b64aa11eb2 PCI: Set bridge map_irq and swizzle_irq to default functions 
The majority of DT based host drivers use the default .map_irq() and
.swizzle_irq() functions, so let's initialize the function pointers to
the default and drop setting them in the host drivers.

Drivers like iProc which don't support legacy interrupts need to set
.map_irq() back to NULL.

Link: https://lore.kernel.org/r/20200722022514.1283916-20-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: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
 2020-08-04 16:36:30 +01:00
Rob Herring
669cbc7081 PCI: Move DT resource setup into devm_pci_alloc_host_bridge() 
Now that pci_parse_request_of_pci_ranges() callers just setup
pci_host_bridge.windows and dma_ranges directly and don't need the bus
range returned, we can just initialize them when allocating the
pci_host_bridge struct.

With this, pci_parse_request_of_pci_ranges() becomes a static function.

Link: https://lore.kernel.org/r/20200722022514.1283916-19-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: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
 2020-08-04 16:36:30 +01:00
Krzysztof Wilczyński
caecb05c80 PCI: Remove dev_err() when handing an error from platform_get_irq() 
There is no need to call the dev_err() function directly to print a
custom message when handling an error from either the platform_get_irq() or
platform_get_irq_byname() functions as both are going to display an
appropriate error message in case of a failure.

This change is as per suggestions from Coccinelle, e.g.,

  drivers/pci/controller/dwc/pcie-armada8k.c:252:2-9: line 252 is
  redundant because platform_get_irq() already prints an error

[bhelgaas: squashed into one commit]
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20200802142601.1635926-2-kw@linux.com
Link: https://lore.kernel.org/r/20200802142601.1635926-3-kw@linux.com
Link: https://lore.kernel.org/r/20200802142601.1635926-4-kw@linux.com
Link: https://lore.kernel.org/r/20200802142601.1635926-5-kw@linux.com
Link: https://lore.kernel.org/r/20200802142601.1635926-6-kw@linux.com
Link: https://lore.kernel.org/r/20200802142601.1635926-7-kw@linux.com
Link: https://lore.kernel.org/r/20200802142601.1635926-8-kw@linux.com
Link: https://lore.kernel.org/r/20200802142601.1635926-9-kw@linux.com
Link: https://lore.kernel.org/r/20200802142601.1635926-10-kw@linux.com
Link: https://lore.kernel.org/r/20200803071040.1663662-1-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com> # altera
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> # dwc
 2020-08-03 09:26:03 -05:00
Rob Herring
388637d972 PCI: mobiveil: Use pci_is_root_bus() to check if bus is root bus 
Use pci_is_root_bus() rather than tracking the root bus number to
determine if the bus is the root bus or not. This removes storing
duplicated data as well as the need for the host bridge driver to have
to care about the bus numbers in most cases.

Link: https://lore.kernel.org/r/20200722022514.1283916-7-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: Karthikeyan Mitran <m.karthikeyan@mobiveil.co.in>
Cc: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
 2020-07-23 11:20:50 +01:00
Rob Herring
6a589900d0 PCI: Set default bridge parent device 
The host bridge's parent device is always the platform device. As we
already have a pointer to it in the devres functions, let's initialize
the parent device. Drivers can still override the parent if desired.

Link: https://lore.kernel.org/r/20200722022514.1283916-3-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: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
 2020-07-23 11:20:49 +01:00
Rob Herring
1f9b751220 PCI: mobiveil: Use pci_host_probe() to register host 
The mobiveil host driver does the same host registration and bus scanning
calls as pci_host_probe, so let's use it instead.

Link: https://lore.kernel.org/r/20200522234832.954484-6-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Karthikeyan Mitran <m.karthikeyan@mobiveil.co.in>
Cc: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
 2020-07-10 11:50:23 +01:00
Aman Sharma
0584bff096 PCI: Check for platform_get_irq() failure consistently 
The platform_get_irq*() interfaces return either a negative error number or
a valid IRQ.  0 is not a valid return value, so check for "< 0" to detect
failure as recommended by the function documentation.

On failure, return the error number from platform_get_irq*() instead of
making up a new one.

Link: https://lore.kernel.org/r/cover.1583952275.git.amanharitsh123@gmail.com
[bhelgaas: commit log, squash into one patch]
Signed-off-by: Aman Sharma <amanharitsh123@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Karthikeyan Mitran <m.karthikeyan@mobiveil.co.in>
Cc: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Ryder Lee <ryder.lee@mediatek.com>
Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
 2020-05-12 08:14:43 -05:00
Hou Zhiqiang
863bba34d2 PCI: mobiveil: Fix unmet dependency warning for PCIE_MOBIVEIL_PLAT 
Fix the following warning by adding the dependency PCI_MSI_IRQ_DOMAIN
to PCIE_MOBIVEIL_PLAT.

WARNING: unmet direct dependencies detected for PCIE_MOBIVEIL_HOST
  Depends on [n]: PCI [=y] && PCI_MSI_IRQ_DOMAIN [=n]
  Selected by [y]:
  - PCIE_MOBIVEIL_PLAT [=y] && PCI [=y] && (ARCH_ZYNQMP || COMPILE_TEST [=y]) && OF [=y]

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
 2020-03-18 10:39:52 +00:00
Hou Zhiqiang
92a17e5c79 PCI: mobiveil: Fix sparse different address space warnings 
Fix the sparse warnings below:

drivers/pci/controller/mobiveil/pcie-mobiveil.c:44:49: warning: incorrect type in return expression (different address spaces)
drivers/pci/controller/mobiveil/pcie-mobiveil.c:44:49:    expected void *
drivers/pci/controller/mobiveil/pcie-mobiveil.c:44:49:    got void [noderef] <asn:2> *
drivers/pci/controller/mobiveil/pcie-mobiveil.c:48:41: warning: incorrect type in return expression (different address spaces)
drivers/pci/controller/mobiveil/pcie-mobiveil.c:48:41:    expected void *
drivers/pci/controller/mobiveil/pcie-mobiveil.c:48:41:    got void [noderef] <asn:2> *
drivers/pci/controller/mobiveil/pcie-mobiveil.c:106:34: warning: incorrect type in argument 1 (different address spaces)
drivers/pci/controller/mobiveil/pcie-mobiveil.c:106:34:    expected void [noderef] <asn:2> *addr
drivers/pci/controller/mobiveil/pcie-mobiveil.c:106:34:    got void *[assigned] addr
drivers/pci/controller/mobiveil/pcie-mobiveil.c:121:35: warning: incorrect type in argument 1 (different address spaces)
drivers/pci/controller/mobiveil/pcie-mobiveil.c:121:35:    expected void [noderef] <asn:2> *addr
drivers/pci/controller/mobiveil/pcie-mobiveil.c:121:35:    got void *[assigned] addr

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reported-by: kbuild test robot <lkp@intel.com>
 2020-03-17 15:38:20 +00:00
Hou Zhiqiang
d29ad70a81 PCI: mobiveil: Add PCIe Gen4 RC driver for Layerscape SoCs 
Add a PCI host controller driver for Layerscape SoCs integrating
the Mobiveil GPEX IP.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk>
 2020-02-21 11:54:12 +00:00
Hou Zhiqiang
11d22cc395 PCI: mobiveil: Add Header Type field check 
Check the Header Type and exit from the host driver initialization if
it is not in host mode.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk>
 2020-02-21 11:53:22 +00:00
Hou Zhiqiang
029dea3cdc PCI: mobiveil: Add 8-bit and 16-bit CSR register accessors 
There are some 8-bit and 16-bit registers in PCIe configuration
space, so add these accessors accordingly.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk>
 2020-02-21 11:53:22 +00:00
Hou Zhiqiang
52cae4c708 PCI: mobiveil: Allow mobiveil_host_init() to be used to re-init host 
Allow the mobiveil_host_init() function to be used to re-init
host controller's PAB and GPEX CSR register block, since the NXP
integrated Mobiveil IP has to reset and then re-init the PAB
and GPEX CSR registers upon hot-reset.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk>
 2020-02-21 11:53:22 +00:00
Hou Zhiqiang
fc99b3311a PCI: mobiveil: Add callback function for link up check 
Platforms integrating the Mobiveil GPEX can implement a specific
mechanism to check the link status.

Add a callback to enable platform specific link status functions.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
[lorenzo.pieralisi@arm.com: updated log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
 2020-02-21 11:53:22 +00:00
Hou Zhiqiang
ed620e9654 PCI: mobiveil: Add callback function for interrupt initialization 
The Mobiveil GPEX internal MSI/INTx controller is not implemented
in all platforms in which the Mobiveil GPEX is integrated.

Allow platforms to implement their specific interrupt initialization.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk>
 2020-02-21 11:53:22 +00:00
Hou Zhiqiang
03bdc38840 PCI: mobiveil: Modularize the Mobiveil PCIe Host Bridge IP driver 
Modularize the Mobiveil PCIe host driver according to the abstraction of
Root Complex and Endpoint and move it into a new directory in order to
make it easier to reuse the driver functions to add new host drivers for
systems integrating the Mobiveil PCIe GPEX IP.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
 2020-02-21 11:53:22 +00:00