PCI: Add defines for normal and subtractive PCI bridges

Add these PCI class codes to pci_ids.h:

PCI_CLASS_BRIDGE_PCI_NORMAL
PCI_CLASS_BRIDGE_PCI_SUBTRACTIVE

Use these defines in all kernel code for describing PCI class codes for
normal and subtractive PCI bridges.

[bhelgaas: similar change in pci-mvebu.c]
Link: https://lore.kernel.org/r/20220214114109.26809-1-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: iproc: Rename iproc_pcie_bcma_ to iproc_bcma_pcie_

Rename iproc_pcie_bcma_* to iproc_bcma_pcie_* for consistency with other
drivers. No functional change intended.

Link: https://lore.kernel.org/r/20211223011054.1227810-12-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Ray Jui <rjui@broadcom.com>
Cc: Scott Branden <sbranden@broadcom.com>

PCI: iproc: Fix BCMA probe resource handling

In commit 7ef1c871da16 ("PCI: iproc: Use
pci_parse_request_of_pci_ranges()"), calling
devm_request_pci_bus_resources() was dropped from the common iProc
probe code, but is still needed for BCMA bus probing. Without it, there
will be lots of warnings like this:

pci 0000:00:00.0: BAR 8: no space for [mem size 0x00c00000]
pci 0000:00:00.0: BAR 8: failed to assign [mem size 0x00c00000]

Add back calling devm_request_pci_bus_resources() and adding the
resources to pci_host_bridge.windows for BCMA bus probe.

Link: https://lore.kernel.org/r/20210803215656.3803204-2-robh@kernel.org
Fixes: 7ef1c871da16 ("PCI: iproc: Use pci_parse_request_of_pci_ranges()")
Reported-by: Rafał Miłecki <zajec5@gmail.com>
Tested-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Srinath Mannam <srinath.mannam@broadcom.com>
Cc: Roman Bacik <roman.bacik@broadcom.com>
Cc: Bharat Gooty <bharat.gooty@broadcom.com>
Cc: Abhishek Shah <abhishek.shah@broadcom.com>
Cc: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Cc: Ray Jui <ray.jui@broadcom.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: BCM Kernel Feedback <bcm-kernel-feedback-list@broadcom.com>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: "Krzysztof Wilczyński" <kw@linux.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>

PCI: iproc: Use module_bcma_driver to simplify the code

module_bcma_driver() makes the code simpler by eliminating
boilerplate code.

Link: https://lore.kernel.org/r/20200918030829.3946025-1-liushixin2@huawei.com
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Ray Jui <ray.jui@broadcom.com>

PCI: Collect all native drivers under drivers/pci/controller/

Native PCI drivers for root complex devices were originally all in
drivers/pci/host/. Some of these devices can also be operated in endpoint
mode. Drivers for endpoint mode didn't seem to fit in the "host"
directory, so we put both the root complex and endpoint drivers in
per-device directories, e.g., drivers/pci/dwc/, drivers/pci/cadence/, etc.

These per-device directories contain trivial Kconfig and Makefiles and
clutter drivers/pci/. Make a new drivers/pci/controllers/ directory and
collect all the device-specific drivers there.

No functional change intended.

Link: https://lkml.kernel.org/r/1520304202-232891-1-git-send-email-shawn.lin@rock-chips.com
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>