Commit Graph

642 Commits

Author SHA1 Message Date
Ard Biesheuvel
08d53aa58c of/fdt: export fdt blob as /sys/firmware/fdt
Create a new /sys entry '/sys/firmware/fdt' to export the FDT blob
that was passed to the kernel by the bootloader. This allows userland
applications such as kexec to access the raw binary.

The fact that this node does not reside under /sys/firmware/device-tree
is deliberate: FDT is also used on arm64 UEFI/ACPI systems to
communicate just the UEFI and ACPI entry points, but the FDT is never
unflattened and used to configure the system.

A CRC32 checksum is calculated over the entire FDT blob, and verified
at late_initcall time. The sysfs entry is instantiated only if the
checksum is valid, i.e., if the FDT blob has not been modified in the
mean time. Otherwise, a warning is printed.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-19 15:09:49 +00:00
Kevin Cernekee
53a4ab96c6 of: Change of_device_is_available() to return bool
This function can only return true or false; using a bool makes it more
obvious to the reader.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-18 17:32:55 +00:00
Kevin Cernekee
25c7a1de6c of: Fix of_device_is_compatible() comment
This function passes back a value from __of_device_is_compatible(), which
returns a score in the range 0..11, not a bool.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-18 17:32:07 +00:00
Benjamin Herrenschmidt
a0212ae0be of/address: Don't throw errors on absent ranges properties
The core always tries to translate any "reg" property to construct the platform
device names. This results in a pile of "OF: no ranges; cannot translate" errors
in dmesg whenever we expose things like i2c devices that cannot directly translate
to the MMIO space.

Turn this into a pr_debug instead

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-18 16:59:06 +00:00
Grant Likely
43c0767e17 of/platform: Move platform devices under /sys/devices/platform
Currently the devices created by drivers/of/platform.c get created at
the root of /sys/devices. This goes against the typical pattern for
sysfs where the top level /sys/devices structure contains categories of
devices, and the structure of devices is placed below that. To fix this,
make the code in drivers/of/platform.c follow the drivers/base/platform.c
behaviour, and use &platform_bus as the default parent for all new
platform_devices and amba_devices.

This change has been discussed for a long time, but nobody has actually
acted on it. Userspace code that expects to find devices under a fixed
/sys/devices/... path will be affected. It isn't /supposed/ to do that,
but if anyone complains then I'll add a default-off workaround option to
put them back into the root.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
2014-11-04 16:44:37 +00:00
Geert Uytterhoeven
c0e848d8b8 of: Remove spaces before tabs
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-04 16:43:14 +00:00
Geert Uytterhoeven
c50949d329 of: Grammar s/an/a/
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-04 16:43:13 +00:00
Geert Uytterhoeven
1821dda4ae of: Improve grammar for of_alias_scan() documentation
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-04 16:43:12 +00:00
Geert Uytterhoeven
d94a75c133 of: Correct of_phandle_args node reference in comments
The device_node pointer in struct of_phandle_args is called "np", not
"node".

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-04 16:43:11 +00:00
Ard Biesheuvel
8cccffc526 of: check for size < 0 after rounding in early_init_dt_add_memory_arch
Memory regions passed to early_init_dt_add_memory_arch() are rounded to
PAGE_SIZE by subtracting the size of the leading fractional page from
the 'size' argument. However, size being a u64 type, if its value is
sufficiently small, the subtraction wraps around and produces a bogus
value, potentially leading to crashes.

Fix this by ignoring the memory range in such cases.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-04 16:43:10 +00:00
Bjorn Helgaas
50ba08f301 of/fdt: Don't clear initial_boot_params if fdt_check_header() fails
If the device tree pointer is NULL, early_init_dt_verify() fails, leaving
initial_boot_params unchanged.  If the device tree pointer is non-NULL but
invalid, early_init_dt_verify() again fails but this time it also clears
initial_boot_params.

Leave initial_boot_params unchanged if the device tree pointer is invalid.
This doesn't fix a bug, but it makes the behavior more consistent and
easier to analyze.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-04 16:43:09 +00:00
Matthias Brugger
b75b276bea of: Request and map make argument name constant
This patch makes the name argument from of_io_request_and_map constant.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-04 16:43:08 +00:00
Grant Likely
19fd74879a of/unittest: Rename selftest.c to unittest.c
This is unit testing code. It should use that name because it makes more
sense than 'selftest'. Rename the files to match and rename the config
variable.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-04 16:43:07 +00:00
Grant Likely
851da976dc of/unittest: Remove test devices after adding them
The of_platform_populate() test cases don't remove the test devices
after they are added. Fix this by adding tests for
of_platform_depopulate().

At the same time rework the selftest() macro to return the test result
value. This makes it easy to use the macro inside an if() condition.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-04 16:43:04 +00:00
Grant Likely
5063e25a30 of: Eliminate of_allnodes list
The device tree structure is composed of two lists; the 'allnodes' list
which is a singly linked list containing every node in the tree, and the
child->parent structure where each parent node has a singly linked list
of children. All of the data in the allnodes list can be easily
reproduced with the parent-child lists, so of_allnodes is actually
unnecessary. Remove it entirely which saves a bit of memory and
simplifies the data structure quite a lot.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com>
Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-11-04 13:29:38 +00:00
Grant Likely
a87fa1d81a of: Fix overflow bug in string property parsing functions
The string property read helpers will run off the end of the buffer if
it is handed a malformed string property. Rework the parsers to make
sure that doesn't happen. At the same time add new test cases to make
sure the functions behave themselves.

The original implementations of of_property_read_string_index() and
of_property_count_strings() both open-coded the same block of parsing
code, each with it's own subtly different bugs. The fix here merges
functions into a single helper and makes the original functions static
inline wrappers around the helper.

One non-bugfix aspect of this patch is the addition of a new wrapper,
of_property_read_string_array(). The new wrapper is needed by the
device_properties feature that Rafael is working on and planning to
merge for v3.19. The implementation is identical both with and without
the new static inline wrapper, so it just got left in to reduce the
churn on the header file.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Darren Hart <darren.hart@intel.com>
Cc: <stable@vger.kernel.org>  # v3.3+: Drop selftest hunks that don't apply
2014-11-04 10:19:48 +00:00
Marek Szyprowski
47f29df7db drivers: of: add return value to of_reserved_mem_device_init()
Driver calling of_reserved_mem_device_init() might be interested if the
initialization has been successful or not, so add support for returning
error code.

This fixes a build warining caused by commit 7bfa5ab6fa ("drivers:
dma-coherent: add initialization from device tree"), which has been
merged without this change and without fixing function return value.

Fixes: 7bfa5ab6fa ("drivers: dma-coherent: add initialization from device tree")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Laura Abbott <lauraa@codeaurora.org>
Cc: Josh Cartwright <joshc@codeaurora.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-29 16:33:14 -07:00
Linus Torvalds
e98d6e7f76 Devicetree changes for v3.18
This branch contains bug fixes and new features for the devicetree code.
 Most of the changes are either new testcases for the selftest code or
 documentation changes. The most notable change is the addition of a
 phandle resolver for use when grafting in a second device tree blob into
 the core tree. The resolver isn't currently used by anything other than
 the selftest module, but it will be used to support device tree
 overlays; probably in the v3.19 timeframe.
 
 Also note that I've moved my normal tree from git.secretlab.ca to
 git.kernel.org.
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Merge tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux

Pull devicetree changes from Grant Likely:
 "This branch contains bug fixes and new features for the devicetree
  code.

  Most of the changes are either new testcases for the selftest code or
  documentation changes.  The most notable change is the addition of a
  phandle resolver for use when grafting in a second device tree blob
  into the core tree.  The resolver isn't currently used by anything
  other than the selftest module, but it will be used to support device
  tree overlays; probably in the v3.19 timeframe.

  Also note that I've moved my normal tree from git.secretlab.ca to
  git.kernel.org"

* tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux:
  of/selftest: Move hash table off stack to fix large frame size
  To remove non-ascii characters in of_selftest.txt
  of/selftest: Use the resolver to fixup phandles
  of: Introduce Device Tree resolve support.
  of/selftest: Add a test for duplicate phandles
  of: Don't try to search when phandle == 0
  of/selftest: Test structure of device tree
  of: Fix NULL dereference in selftest removal code
  of: add vendor prefix for Chipidea
  of: Add vendor prefix for Innolux Corporation
  of: Add vendor prefix for Sitronix
  devicetree: bindings: Document Gateworks vendor prefix
  of: Add vendor prefix for Energy Micro
  dt/documentation: add specification of dma bus information
2014-10-11 06:47:50 -04:00
Linus Torvalds
80213c03c4 PCI changes for the v3.18 merge window:
Enumeration
     - Check Vendor ID only for Config Request Retry Status (Rajat Jain)
     - Enable Config Request Retry Status when supported (Rajat Jain)
     - Add generic domain handling (Catalin Marinas)
     - Generate uppercase hex for modalias interface class (Ricardo Ribalda Delgado)
 
   Resource management
     - Add missing MEM_64 mask in pci_assign_unassigned_bridge_resources() (Yinghai Lu)
     - Increase IBM ipr SAS Crocodile BARs to at least system page size (Douglas Lehr)
 
   PCI device hotplug
     - Prevent NULL dereference during pciehp probe (Andreas Noever)
     - Move _HPP & _HPX handling into core (Bjorn Helgaas)
     - Apply _HPP to PCIe devices as well as PCI (Bjorn Helgaas)
     - Apply _HPP/_HPX to display devices (Bjorn Helgaas)
     - Preserve SERR & PARITY settings when applying _HPP/_HPX (Bjorn Helgaas)
     - Preserve MPS and MRRS settings when applying _HPP/_HPX (Bjorn Helgaas)
     - Apply _HPP/_HPX to all devices, not just hot-added ones (Bjorn Helgaas)
     - Fix wait time in pciehp timeout message (Yinghai Lu)
     - Add more pciehp Slot Control debug output (Yinghai Lu)
     - Stop disabling pciehp notifications during init (Yinghai Lu)
 
   MSI
     - Remove arch_msi_check_device() (Alexander Gordeev)
     - Rename pci_msi_check_device() to pci_msi_supported() (Alexander Gordeev)
     - Move D0 check into pci_msi_check_device() (Alexander Gordeev)
     - Remove unused kobject from struct msi_desc (Yijing Wang)
     - Remove "pos" from the struct msi_desc msi_attrib (Yijing Wang)
     - Add "msi_bus" sysfs MSI/MSI-X control for endpoints (Yijing Wang)
     - Use __get_cached_msi_msg() instead of get_cached_msi_msg() (Yijing Wang)
     - Use __read_msi_msg() instead of read_msi_msg() (Yijing Wang)
     - Use __write_msi_msg() instead of write_msi_msg() (Yijing Wang)
 
   Power management
     - Drop unused runtime PM support code for PCIe ports (Rafael J.  Wysocki)
     - Allow PCI devices to be put into D3cold during system suspend (Rafael J. Wysocki)
 
   AER
     - Add additional AER error strings (Gong Chen)
     - Make <linux/aer.h> standalone includable (Thierry Reding)
 
   Virtualization
     - Add ACS quirk for Solarflare SFC9120 & SFC9140 (Alex Williamson)
     - Add ACS quirk for Intel 10G NICs (Alex Williamson)
     - Add ACS quirk for AMD A88X southbridge (Marti Raudsepp)
     - Remove unused pci_find_upstream_pcie_bridge(), pci_get_dma_source() (Alex Williamson)
     - Add device flag helpers (Ethan Zhao)
     - Assume all Mellanox devices have broken INTx masking (Gavin Shan)
 
   Generic host bridge driver
     - Fix ioport_map() for !CONFIG_GENERIC_IOMAP (Liviu Dudau)
     - Add pci_register_io_range() and pci_pio_to_address() (Liviu Dudau)
     - Define PCI_IOBASE as the base of virtual PCI IO space (Liviu Dudau)
     - Fix the conversion of IO ranges into IO resources (Liviu Dudau)
     - Add pci_get_new_domain_nr() and of_get_pci_domain_nr() (Liviu Dudau)
     - Add support for parsing PCI host bridge resources from DT (Liviu Dudau)
     - Add pci_remap_iospace() to map bus I/O resources (Liviu Dudau)
     - Add arm64 architectural support for PCI (Liviu Dudau)
 
   APM X-Gene
     - Add APM X-Gene PCIe driver (Tanmay Inamdar)
     - Add arm64 DT APM X-Gene PCIe device tree nodes (Tanmay Inamdar)
 
   Freescale i.MX6
     - Probe in module_init(), not fs_initcall() (Lucas Stach)
     - Delay enabling reference clock for SS until it stabilizes (Tim Harvey)
 
   Marvell MVEBU
     - Fix uninitialized variable in mvebu_get_tgt_attr() (Thomas Petazzoni)
 
   NVIDIA Tegra
     - Make sure the PCIe PLL is really reset (Eric Yuen)
     - Add error path tegra_msi_teardown_irq() cleanup (Jisheng Zhang)
     - Fix extended configuration space mapping (Peter Daifuku)
     - Implement resource hierarchy (Thierry Reding)
     - Clear CLKREQ# enable on port disable (Thierry Reding)
     - Add Tegra124 support (Thierry Reding)
 
   ST Microelectronics SPEAr13xx
     - Pass config resource through reg property (Pratyush Anand)
 
   Synopsys DesignWare
     - Use NULL instead of false (Fabio Estevam)
     - Parse bus-range property from devicetree (Lucas Stach)
     - Use pci_create_root_bus() instead of pci_scan_root_bus() (Lucas Stach)
     - Remove pci_assign_unassigned_resources() (Lucas Stach)
     - Check private_data validity in single place (Lucas Stach)
     - Setup and clear exactly one MSI at a time (Lucas Stach)
     - Remove open-coded bitmap operations (Lucas Stach)
     - Fix configuration base address when using 'reg' (Minghuan Lian)
     - Fix IO resource end address calculation (Minghuan Lian)
     - Rename get_msi_data() to get_msi_addr() (Minghuan Lian)
     - Add get_msi_data() to pcie_host_ops (Minghuan Lian)
     - Add support for v3.65 hardware (Murali Karicheri)
     - Fold struct pcie_port_info into struct pcie_port (Pratyush Anand)
 
   TI Keystone
     - Add TI Keystone PCIe driver (Murali Karicheri)
     - Limit MRSS for all downstream devices (Murali Karicheri)
     - Assume controller is already in RC mode (Murali Karicheri)
     - Set device ID based on SoC to support multiple ports (Murali Karicheri)
 
   Xilinx AXI
     - Add Xilinx AXI PCIe driver (Srikanth Thokala)
     - Fix xilinx_pcie_assign_msi() return value test (Dan Carpenter)
 
   Miscellaneous
     - Clean up whitespace (Quentin Lambert)
     - Remove assignments from "if" conditions (Quentin Lambert)
     - Move PCI_VENDOR_ID_VMWARE to pci_ids.h (Francesco Ruggeri)
     - x86: Mark DMI tables as initialization data (Mathias Krause)
     - x86: Move __init annotation to the correct place (Mathias Krause)
     - x86: Mark constants of pci_mmcfg_nvidia_mcp55() as __initconst (Mathias Krause)
     - x86: Constify pci_mmcfg_probes[] array (Mathias Krause)
     - x86: Mark PCI BIOS initialization code as such (Mathias Krause)
     - Parenthesize PCI_DEVID and PCI_VPD_LRDT_ID parameters (Megan Kamiya)
     - Remove unnecessary variable in pci_add_dynid() (Tobias Klauser)
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Merge tag 'pci-v3.18-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "The interesting things here are:

   - Turn on Config Request Retry Status Software Visibility.  This
     caused hangs last time, but we included a fix this time.
   - Rework PCI device configuration to use _HPP/_HPX more aggressively
   - Allow PCI devices to be put into D3cold during system suspend
   - Add arm64 PCI support
   - Add APM X-Gene host bridge driver
   - Add TI Keystone host bridge driver
   - Add Xilinx AXI host bridge driver

  More detailed summary:

  Enumeration
    - Check Vendor ID only for Config Request Retry Status (Rajat Jain)
    - Enable Config Request Retry Status when supported (Rajat Jain)
    - Add generic domain handling (Catalin Marinas)
    - Generate uppercase hex for modalias interface class (Ricardo Ribalda Delgado)

  Resource management
    - Add missing MEM_64 mask in pci_assign_unassigned_bridge_resources() (Yinghai Lu)
    - Increase IBM ipr SAS Crocodile BARs to at least system page size (Douglas Lehr)

  PCI device hotplug
    - Prevent NULL dereference during pciehp probe (Andreas Noever)
    - Move _HPP & _HPX handling into core (Bjorn Helgaas)
    - Apply _HPP to PCIe devices as well as PCI (Bjorn Helgaas)
    - Apply _HPP/_HPX to display devices (Bjorn Helgaas)
    - Preserve SERR & PARITY settings when applying _HPP/_HPX (Bjorn Helgaas)
    - Preserve MPS and MRRS settings when applying _HPP/_HPX (Bjorn Helgaas)
    - Apply _HPP/_HPX to all devices, not just hot-added ones (Bjorn Helgaas)
    - Fix wait time in pciehp timeout message (Yinghai Lu)
    - Add more pciehp Slot Control debug output (Yinghai Lu)
    - Stop disabling pciehp notifications during init (Yinghai Lu)

  MSI
    - Remove arch_msi_check_device() (Alexander Gordeev)
    - Rename pci_msi_check_device() to pci_msi_supported() (Alexander Gordeev)
    - Move D0 check into pci_msi_check_device() (Alexander Gordeev)
    - Remove unused kobject from struct msi_desc (Yijing Wang)
    - Remove "pos" from the struct msi_desc msi_attrib (Yijing Wang)
    - Add "msi_bus" sysfs MSI/MSI-X control for endpoints (Yijing Wang)
    - Use __get_cached_msi_msg() instead of get_cached_msi_msg() (Yijing Wang)
    - Use __read_msi_msg() instead of read_msi_msg() (Yijing Wang)
    - Use __write_msi_msg() instead of write_msi_msg() (Yijing Wang)

  Power management
    - Drop unused runtime PM support code for PCIe ports (Rafael J.  Wysocki)
    - Allow PCI devices to be put into D3cold during system suspend (Rafael J. Wysocki)

  AER
    - Add additional AER error strings (Gong Chen)
    - Make <linux/aer.h> standalone includable (Thierry Reding)

  Virtualization
    - Add ACS quirk for Solarflare SFC9120 & SFC9140 (Alex Williamson)
    - Add ACS quirk for Intel 10G NICs (Alex Williamson)
    - Add ACS quirk for AMD A88X southbridge (Marti Raudsepp)
    - Remove unused pci_find_upstream_pcie_bridge(), pci_get_dma_source() (Alex Williamson)
    - Add device flag helpers (Ethan Zhao)
    - Assume all Mellanox devices have broken INTx masking (Gavin Shan)

  Generic host bridge driver
    - Fix ioport_map() for !CONFIG_GENERIC_IOMAP (Liviu Dudau)
    - Add pci_register_io_range() and pci_pio_to_address() (Liviu Dudau)
    - Define PCI_IOBASE as the base of virtual PCI IO space (Liviu Dudau)
    - Fix the conversion of IO ranges into IO resources (Liviu Dudau)
    - Add pci_get_new_domain_nr() and of_get_pci_domain_nr() (Liviu Dudau)
    - Add support for parsing PCI host bridge resources from DT (Liviu Dudau)
    - Add pci_remap_iospace() to map bus I/O resources (Liviu Dudau)
    - Add arm64 architectural support for PCI (Liviu Dudau)

  APM X-Gene
    - Add APM X-Gene PCIe driver (Tanmay Inamdar)
    - Add arm64 DT APM X-Gene PCIe device tree nodes (Tanmay Inamdar)

  Freescale i.MX6
    - Probe in module_init(), not fs_initcall() (Lucas Stach)
    - Delay enabling reference clock for SS until it stabilizes (Tim Harvey)

  Marvell MVEBU
    - Fix uninitialized variable in mvebu_get_tgt_attr() (Thomas Petazzoni)

  NVIDIA Tegra
    - Make sure the PCIe PLL is really reset (Eric Yuen)
    - Add error path tegra_msi_teardown_irq() cleanup (Jisheng Zhang)
    - Fix extended configuration space mapping (Peter Daifuku)
    - Implement resource hierarchy (Thierry Reding)
    - Clear CLKREQ# enable on port disable (Thierry Reding)
    - Add Tegra124 support (Thierry Reding)

  ST Microelectronics SPEAr13xx
    - Pass config resource through reg property (Pratyush Anand)

  Synopsys DesignWare
    - Use NULL instead of false (Fabio Estevam)
    - Parse bus-range property from devicetree (Lucas Stach)
    - Use pci_create_root_bus() instead of pci_scan_root_bus() (Lucas Stach)
    - Remove pci_assign_unassigned_resources() (Lucas Stach)
    - Check private_data validity in single place (Lucas Stach)
    - Setup and clear exactly one MSI at a time (Lucas Stach)
    - Remove open-coded bitmap operations (Lucas Stach)
    - Fix configuration base address when using 'reg' (Minghuan Lian)
    - Fix IO resource end address calculation (Minghuan Lian)
    - Rename get_msi_data() to get_msi_addr() (Minghuan Lian)
    - Add get_msi_data() to pcie_host_ops (Minghuan Lian)
    - Add support for v3.65 hardware (Murali Karicheri)
    - Fold struct pcie_port_info into struct pcie_port (Pratyush Anand)

  TI Keystone
    - Add TI Keystone PCIe driver (Murali Karicheri)
    - Limit MRSS for all downstream devices (Murali Karicheri)
    - Assume controller is already in RC mode (Murali Karicheri)
    - Set device ID based on SoC to support multiple ports (Murali Karicheri)

  Xilinx AXI
    - Add Xilinx AXI PCIe driver (Srikanth Thokala)
    - Fix xilinx_pcie_assign_msi() return value test (Dan Carpenter)

  Miscellaneous
    - Clean up whitespace (Quentin Lambert)
    - Remove assignments from "if" conditions (Quentin Lambert)
    - Move PCI_VENDOR_ID_VMWARE to pci_ids.h (Francesco Ruggeri)
    - x86: Mark DMI tables as initialization data (Mathias Krause)
    - x86: Move __init annotation to the correct place (Mathias Krause)
    - x86: Mark constants of pci_mmcfg_nvidia_mcp55() as __initconst (Mathias Krause)
    - x86: Constify pci_mmcfg_probes[] array (Mathias Krause)
    - x86: Mark PCI BIOS initialization code as such (Mathias Krause)
    - Parenthesize PCI_DEVID and PCI_VPD_LRDT_ID parameters (Megan Kamiya)
    - Remove unnecessary variable in pci_add_dynid() (Tobias Klauser)"

* tag 'pci-v3.18-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (109 commits)
  arm64: dts: Add APM X-Gene PCIe device tree nodes
  PCI: Add ACS quirk for AMD A88X southbridge devices
  PCI: xgene: Add APM X-Gene PCIe driver
  PCI: designware: Remove open-coded bitmap operations
  PCI/MSI: Remove unnecessary temporary variable
  PCI/MSI: Use __write_msi_msg() instead of write_msi_msg()
  MSI/powerpc: Use __read_msi_msg() instead of read_msi_msg()
  PCI/MSI: Use __get_cached_msi_msg() instead of get_cached_msi_msg()
  PCI/MSI: Add "msi_bus" sysfs MSI/MSI-X control for endpoints
  PCI/MSI: Remove "pos" from the struct msi_desc msi_attrib
  PCI/MSI: Remove unused kobject from struct msi_desc
  PCI/MSI: Rename pci_msi_check_device() to pci_msi_supported()
  PCI/MSI: Move D0 check into pci_msi_check_device()
  PCI/MSI: Remove arch_msi_check_device()
  irqchip: armada-370-xp: Remove arch_msi_check_device()
  PCI/MSI/PPC: Remove arch_msi_check_device()
  arm64: Add architectural support for PCI
  PCI: Add pci_remap_iospace() to map bus I/O resources
  of/pci: Add support for parsing PCI host bridge resources from DT
  of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr()
  ...

Conflicts:
	arch/arm64/boot/dts/apm-storm.dtsi
2014-10-09 15:03:49 -04:00
Linus Torvalds
35a9ad8af0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
 "Most notable changes in here:

   1) By far the biggest accomplishment, thanks to a large range of
      contributors, is the addition of multi-send for transmit.  This is
      the result of discussions back in Chicago, and the hard work of
      several individuals.

      Now, when the ->ndo_start_xmit() method of a driver sees
      skb->xmit_more as true, it can choose to defer the doorbell
      telling the driver to start processing the new TX queue entires.

      skb->xmit_more means that the generic networking is guaranteed to
      call the driver immediately with another SKB to send.

      There is logic added to the qdisc layer to dequeue multiple
      packets at a time, and the handling mis-predicted offloads in
      software is now done with no locks held.

      Finally, pktgen is extended to have a "burst" parameter that can
      be used to test a multi-send implementation.

      Several drivers have xmit_more support: i40e, igb, ixgbe, mlx4,
      virtio_net

      Adding support is almost trivial, so export more drivers to
      support this optimization soon.

      I want to thank, in no particular or implied order, Jesper
      Dangaard Brouer, Eric Dumazet, Alexander Duyck, Tom Herbert, Jamal
      Hadi Salim, John Fastabend, Florian Westphal, Daniel Borkmann,
      David Tat, Hannes Frederic Sowa, and Rusty Russell.

   2) PTP and timestamping support in bnx2x, from Michal Kalderon.

   3) Allow adjusting the rx_copybreak threshold for a driver via
      ethtool, and add rx_copybreak support to enic driver.  From
      Govindarajulu Varadarajan.

   4) Significant enhancements to the generic PHY layer and the bcm7xxx
      driver in particular (EEE support, auto power down, etc.) from
      Florian Fainelli.

   5) Allow raw buffers to be used for flow dissection, allowing drivers
      to determine the optimal "linear pull" size for devices that DMA
      into pools of pages.  The objective is to get exactly the
      necessary amount of headers into the linear SKB area pre-pulled,
      but no more.  The new interface drivers use is eth_get_headlen().
      From WANG Cong, with driver conversions (several had their own
      by-hand duplicated implementations) by Alexander Duyck and Eric
      Dumazet.

   6) Support checksumming more smoothly and efficiently for
      encapsulations, and add "foo over UDP" facility.  From Tom
      Herbert.

   7) Add Broadcom SF2 switch driver to DSA layer, from Florian
      Fainelli.

   8) eBPF now can load programs via a system call and has an extensive
      testsuite.  Alexei Starovoitov and Daniel Borkmann.

   9) Major overhaul of the packet scheduler to use RCU in several major
      areas such as the classifiers and rate estimators.  From John
      Fastabend.

  10) Add driver for Intel FM10000 Ethernet Switch, from Alexander
      Duyck.

  11) Rearrange TCP_SKB_CB() to reduce cache line misses, from Eric
      Dumazet.

  12) Add Datacenter TCP congestion control algorithm support, From
      Florian Westphal.

  13) Reorganize sk_buff so that __copy_skb_header() is significantly
      faster.  From Eric Dumazet"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1558 commits)
  netlabel: directly return netlbl_unlabel_genl_init()
  net: add netdev_txq_bql_{enqueue, complete}_prefetchw() helpers
  net: description of dma_cookie cause make xmldocs warning
  cxgb4: clean up a type issue
  cxgb4: potential shift wrapping bug
  i40e: skb->xmit_more support
  net: fs_enet: Add NAPI TX
  net: fs_enet: Remove non NAPI RX
  r8169:add support for RTL8168EP
  net_sched: copy exts->type in tcf_exts_change()
  wimax: convert printk to pr_foo()
  af_unix: remove 0 assignment on static
  ipv6: Do not warn for informational ICMP messages, regardless of type.
  Update Intel Ethernet Driver maintainers list
  bridge: Save frag_max_size between PRE_ROUTING and POST_ROUTING
  tipc: fix bug in multicast congestion handling
  net: better IFF_XMIT_DST_RELEASE support
  net/mlx4_en: remove NETDEV_TX_BUSY
  3c59x: fix bad split of cpu_to_le32(pci_map_single())
  net: bcmgenet: fix Tx ring priority programming
  ...
2014-10-08 21:40:54 -04:00
Linus Torvalds
6325e940e7 arm64 updates for 3.18:
- eBPF JIT compiler for arm64
 - CPU suspend backend for PSCI (firmware interface) with standard idle
   states defined in DT (generic idle driver to be merged via a different
   tree)
 - Support for CONFIG_DEBUG_SET_MODULE_RONX
 - Support for unmapped cpu-release-addr (outside kernel linear mapping)
 - set_arch_dma_coherent_ops() implemented and bus notifiers removed
 - EFI_STUB improvements when base of DRAM is occupied
 - Typos in KGDB macros
 - Clean-up to (partially) allow kernel building with LLVM
 - Other clean-ups (extern keyword, phys_addr_t usage)
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Catalin Marinas:
 - eBPF JIT compiler for arm64
 - CPU suspend backend for PSCI (firmware interface) with standard idle
   states defined in DT (generic idle driver to be merged via a
   different tree)
 - Support for CONFIG_DEBUG_SET_MODULE_RONX
 - Support for unmapped cpu-release-addr (outside kernel linear mapping)
 - set_arch_dma_coherent_ops() implemented and bus notifiers removed
 - EFI_STUB improvements when base of DRAM is occupied
 - Typos in KGDB macros
 - Clean-up to (partially) allow kernel building with LLVM
 - Other clean-ups (extern keyword, phys_addr_t usage)

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (51 commits)
  arm64: Remove unneeded extern keyword
  ARM64: make of_device_ids const
  arm64: Use phys_addr_t type for physical address
  aarch64: filter $x from kallsyms
  arm64: Use DMA_ERROR_CODE to denote failed allocation
  arm64: Fix typos in KGDB macros
  arm64: insn: Add return statements after BUG_ON()
  arm64: debug: don't re-enable debug exceptions on return from el1_dbg
  Revert "arm64: dmi: Add SMBIOS/DMI support"
  arm64: Implement set_arch_dma_coherent_ops() to replace bus notifiers
  of: amba: use of_dma_configure for AMBA devices
  arm64: dmi: Add SMBIOS/DMI support
  arm64: Correct ftrace calls to aarch64_insn_gen_branch_imm()
  arm64:mm: initialize max_mapnr using function set_max_mapnr
  setup: Move unmask of async interrupts after possible earlycon setup
  arm64: LLVMLinux: Fix inline arm64 assembly for use with clang
  arm64: pageattr: Correctly adjust unaligned start addresses
  net: bpf: arm64: fix module memory leak when JIT image build fails
  arm64: add PSCI CPU_SUSPEND based cpu_suspend support
  arm64: kernel: introduce cpu_init_idle CPU operation
  ...
2014-10-08 05:34:24 -04:00
Petri Gynther
fd2ef0ba30 net: phy: adjust fixed_phy_register() return value
Adjust fixed_phy_register() to return struct phy_device *, so that
it becomes easy to use fixed PHYs without device tree support:

  phydev = fixed_phy_register(PHY_POLL, &fixed_phy_status, NULL);
  fixed_phy_set_link_update(phydev, fixed_phy_link_update);
  phy_connect_direct(netdev, phydev, handler_fn, phy_interface);

This change is a prerequisite for modifying bcmgenet driver to work
without a device tree on Broadcom's MIPS-based 7xxx platforms.

Signed-off-by: Petri Gynther <pgynther@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-07 13:06:45 -04:00
Grant Likely
2118f4b8df of/selftest: Move hash table off stack to fix large frame size
The new testcase that checks phandle consistency was using a hash table
on the stack which made the frame size much large than it should be. Fix
the problem by moving the hash table into the file scope.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-10-07 11:30:31 +01:00
Grant Likely
2eb46da2a7 of/selftest: Use the resolver to fixup phandles
The selftest data ends up causing duplicate phandles in the live tree
for the time that the testcase data is inserted into the live tree. This
is obviously a bad situation because anything attempting to read the
tree while the selftests are running make resolve phandles to one of the
testcase data nodes. Fix the problem by using the of_resolve_phandles()
function to eliminate duplicates.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com>
2014-10-04 21:24:35 +01:00
Pantelis Antoniou
7941b27b16 of: Introduce Device Tree resolve support.
Introduce support for dynamic device tree resolution.
Using it, it is possible to prepare a device tree that's
been loaded on runtime to be modified and inserted at the kernel
live tree.

Export of of_resolve and bug fix of double free by
	Guenter Roeck <groeck@juniper.net>

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
[grant.likely: Don't need to select CONFIG_OF_DYNAMIC and CONFIG_OF_DEVICE]
[grant.likely: Don't need to depend on OF or !SPARC]
[grant.likely: Factor out duplicate code blocks into single function]
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-10-04 21:24:26 +01:00
Grant Likely
841ec21357 of/selftest: Add a test for duplicate phandles
All phandles in the tree should be unique. Add a testcase to make sure
that this is so.

Note: this testcase fails on the current kernel because the selftest
code itself ends up adding duplicate phandles. Before this testcase is
merged the selftest code needs to be modified to resolve phandles before
adding them.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
2014-10-04 21:20:19 +01:00
Grant Likely
fc59b4479c of: Don't try to search when phandle == 0
A value of '0' isn't a valid phandle, so searching for a node with that
phandle is pointless. It will result in nothing but false positives.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-10-04 21:20:18 +01:00
Grant Likely
f2051d6a88 of/selftest: Test structure of device tree
Add a testcase to verify that the device tree is properly constructed
and the lists are in a correct order. The new testcase gets run twice;
once after adding the testcase data, and once after removing it again.
It is run twice to make sure adding and removing the testcase data
doesn't corrupt the data structure.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com>
2014-10-04 21:20:13 +01:00
David S. Miller
739e4a758e Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/usb/r8152.c
	net/netfilter/nfnetlink.c

Both r8152 and nfnetlink conflicts were simple overlapping changes.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-02 11:25:43 -07:00
Grant Likely
e66c98c7a0 of: Fix NULL dereference in selftest removal code
The selftest code removes its testcase data from the live tree when
exiting, but if the testcases data tree contains an empty child of the
root, then it causes an oops due to a NULL dereference. The reason is
that the code tries to directly dereference the child pointer without
checking first if a child is actually there.

The solution is to pass the parent node into detach_node_and_children()
instead of trying to pass the child. This required removing the code
that attempts to remove all of the sibling nodes in
detach_node_and_children(), which was never sensible in the first place.

At the same time add a check to make sure the bounds of the nodes list
are not exceeded by the testdata tree. If they are then abort.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com>
2014-10-01 17:01:43 +01:00
Liviu Dudau
cbe4097f8a of/pci: Add support for parsing PCI host bridge resources from DT
Provide a function to parse the PCI DT ranges that can be used to create a
pci_host_bridge structure together with its associated bus.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
[make io_base parameter optional]
Signed-off-by: Robert Richter <rrichter@cavium.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: Catalin Marinas <catalin.marinas@arm.com>
2014-09-30 17:08:57 -06:00
Liviu Dudau
41e5c0f81d of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr()
Add pci_get_new_domain_nr() to allocate a new domain number and
of_get_pci_domain_nr() to retrieve the PCI domain number of a given device
from DT.  Host bridge drivers or architecture-specific code can choose to
implement their PCI domain number policy using these two functions.

Using of_get_pci_domain_nr() guarantees a stable PCI domain number on every
boot provided that all host bridge controllers are assigned a number in the
device tree using "linux,pci-domain" property.  Mixing use of
pci_get_new_domain_nr() and of_get_pci_domain_nr() is not recommended as it
can lead to potentially conflicting domain numbers being assigned to root
buses behind different host bridges.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: Catalin Marinas <catalin.marinas@arm.com>
2014-09-30 17:08:57 -06:00
Liviu Dudau
0b0b0893d4 of/pci: Fix the conversion of IO ranges into IO resources
The ranges property for a host bridge controller in DT describes the
mapping between the PCI bus address and the CPU physical address.  The
resources framework however expects that the IO resources start at a pseudo
"port" address 0 (zero) and have a maximum size of IO_SPACE_LIMIT.  The
conversion from PCI ranges to resources failed to take that into account,
returning a CPU physical address instead of a port number.

Also fix all the drivers that depend on the old behaviour by fetching the
CPU physical address based on the port number where it is being needed.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: Simon Horman <horms@verge.net.au>
CC: Catalin Marinas <catalin.marinas@arm.com>
2014-09-30 17:08:40 -06:00
Liviu Dudau
83bbde1cc0 of/pci: Move of_pci_range_to_resource() to of/address.c
We need to enhance of_pci_range_to_resources() enough that it won't make
sense for it to be inline anymore.  Move it to drivers/of/address.c, under
#ifdef CONFIG_PCI.

of_address.h previously implemented of_pci_range_to_resources()
unconditionally, regardless of any config options.  The implementation in
address.c is defined only when CONFIG_OF_ADDRESS=y and CONFIG_PCI=y,
so add a dummy version to avoid build errors when CONFIG_OF or
CONFIG_OF_ADDRESS is not defined.

[bhelgaas: drop extra detail from changelog, move def under CONFIG_PCI,
add dummy of_pci_range_to_resource() for build errors (from Arnd)]
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Catalin Marinas <catalin.marinas@arm.com>
2014-09-30 13:29:09 -06:00
Liviu Dudau
41f8bba7f5 of/pci: Add pci_register_io_range() and pci_pio_to_address()
Some architectures do not have a simple view of the PCI I/O space and
instead use a range of CPU addresses that map to bus addresses.  For some
architectures these ranges will be expressed by OF bindings in a device
tree file.

This patch introduces a pci_register_io_range() helper function with a
generic implementation that can be used by such architectures to keep track
of the I/O ranges described by the PCI bindings.  If the PCI_IOBASE macro
is not defined, that signals lack of support for PCI and we return an
error.

In order to retrieve the CPU address associated with an I/O port, a new
helper function pci_pio_to_address() is introduced.  This will search in
the list of ranges registered with pci_register_io_range() and return the
CPU address that corresponds to the given port.

[arnd: add dummy !CONFIG_OF pci_pio_to_address() to fix build errors]
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
CC: Grant Likely <grant.likely@linaro.org>
2014-09-30 09:42:45 -06:00
Srinivas Kandagatla
9aacd602f0 of/fdt: fix memory range check
In cases where board has below memory DT node

memory{
	device_type = "memory";
	reg = <0x80000000 0x80000000>;
};

Check on the memory range in fdt.c will always fail because it is
comparing MAX_PHYS_ADDR with base + size, in fact it should compare
it with base + size - 1.

This issue was originally noticed on Qualcomm IFC6410 board.
Without this patch kernel shows up noticed unnecessary warnings

[    0.000000] Machine model: Qualcomm APQ8064/IFC6410
[    0.000000] Ignoring memory range 0xffffffff - 0x100000000
[    0.000000] cma: Reserved 64 MiB at ab800000

as a result the size get reduced to 0x7fffffff which looks wrong.

This patch fixes the check involved in generating this warning and
as a result it also fixes the wrong size calculation.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
[grant.likely: adjust new size calculation also]
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-09-25 11:55:50 +01:00
Robin Murphy
c9d571bee9 of: amba: use of_dma_configure for AMBA devices
Commit 591c1e ("of: configure the platform device dma parameters)
introduced a common mechanism to configure DMA from DT properties.
AMBA devices created from DT can take advantage of this, too.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-09-22 11:26:59 +01:00
Florian Fainelli
2f63715138 of: mdio: honor flags passed to of_phy_connect
Commit f9a8f83b04 ("net: phy: remove flags argument from phy_{attach,
connect, connect_direct}") removed the flags argument to the PHY library
calls to: phy_{attach,connect,connect_direct}.

Most Device Tree aware drivers call of_phy_connect() with the flag
argument set to 0, but some of them might want to set a different value
there in order for the PHY driver to key a specific behavior based on
the phy_device::phy_flags value.

Allow such drivers to set custom phy_flags as part of the
of_phy_connect() call since of_phy_connect() does start the PHY state
machine, it will call into the PHY driver config_init() callback which
is usually where a specific phy_flags value is important.

Fixes: f9a8f83b04 ("net: phy: remove flags argument from phy_{attach, connect, connect_direct}")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-19 16:27:07 -04:00
Geert Uytterhoeven
8f73d4b701 of: Fix memory block alignment in early_init_dt_add_memory_arch()
If a memory block is not aligned to PAGE_SIZE, its base address must be
rounded up, not down, and its size must be reduced.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-09-08 15:57:26 +01:00
Laurentiu Tudor
7dbe5849fb of: make sure of_alias is initialized before accessing it
Simply swap of_alias and of_chosen initialization so
that of_alias ends up read first. This must be done
because it is accessed couple of lines below when
trying to initialize the of_stdout using the alias
based legacy method.

[Fixes a752ee5 - tty: Update hypervisor tty drivers to
use core stdout parsing code]

Signed-off-by: Laurentiu Tudor <Laurentiu.Tudor@freescale.com>
[glikely: Don't move the 'if (!of_aliases)' test]
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-09-08 15:57:26 +01:00
Gaurav Minocha
ef69d74035 of: Disabling OF functions that use sysfs if CONFIG_SYSFS disabled
This patch is to the fix the recent runtime bug in kernel reported by
<fengguang.wu@intel.com>. The bug was exposed by commit b951f9dc,
"Enabling OF selftest to run without machine's devicetree" and is
exposed when CONFIG_OF_SELFTEST is enabled and CONFIG_SYSFS is
disabled.

Mail Subject: [OF test] BUG: unable to handle kernel NULL pointer
dereference at 00000038

Tested on x86 and arm architecture

Signed-off-by: Gaurav Minocha <gaurav.minocha.os@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-09-08 15:57:25 +01:00
Brian Norris
5f74d8b7b8 of: correct of_console_check()'s return value
The comments above of_console_check() say that it will return TRUE if it
registers a preferred console, but add_preferred_console() uses a
0-equals-success convention, so this leaves of_console_check() with an
inconsistent policy for its return values.

Fortunately, nobody was actually checking the return value of
of_console_check(), so this isn't significant at the moment.

But let's match the comments, so we're doing what we say.

Fixes: 3482f2c52b ('of: Create of_console_check() for selecting a console specified in /chosen')
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-09-08 15:57:24 +01:00
Florian Fainelli
a9ecdc0fdc of/irq: Fix lookup to use 'interrupts-extended' property first
In case the Device Tree blob passed by the boot agent supplies both an
'interrupts-extended' and an 'interrupts' property in order to allow for
older kernels to be usable, prefer the new-style 'interrupts-extended'
property which conveys a lot more information.

This allows us to have bootloaders willingly maintaining backwards
compatibility with older kernels without entirely deprecating the
'interrupts' property.

Update the bindings documentation to describe a situation where both the
'interrupts-extended' and the 'interrupts' property are present, and
which one takes precedence over the other.

Cc: stable@vger.kernel.org # 3.13+
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-08-16 09:03:58 +01:00
Gaurav Minocha
b951f9dc7f Enabling OF selftest to run without machine's devicetree
If there is no devicetree present, this patch adds the selftest
data as a live devicetree. It also removes the same after the
testcase execution is complete.

Tested with and without machine's devicetree.

Signed-off-by: Gaurav Minocha <gaurav.minocha.os@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-08-16 09:03:56 +01:00
Al Cooper
b5f2a8c026 of: Allow mem_reserve of memory with a base address of zero
__reserved_mem_reserve_reg() won't reserve memory if the base address
is zero. This change removes the check for a base address of zero and
allows it to be reserved.

Allowing the first 4K of memory to be reserved will help solve a
problem on some ARM systems where the the first 16K of memory is
unused and becomes allocable memory. This will prevent this memory
from being used for DMA by drivers like the USB OHCI driver which
consider a physical address of zero to be illegal.

Cc: stable@vger.kernel.org # 3.15+
Signed-off-by: Al Cooper <alcooperx@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-08-16 09:02:52 +01:00
Linus Torvalds
ae36e95cf8 The branch contains the following device tree changes the v3.17 merge
window:
 
 Group changes to the device tree. In preparation for adding device tree
 overlay support, OF_DYNAMIC is reworked so that a set of device tree
 changes can be prepared and applied to the tree all at once. OF_RECONFIG
 notifiers see the most significant change here so that users always get
 a consistent view of the tree. Notifiers generation is moved from before
 a change to after it, and notifiers for a group of changes are emitted
 after the entire block of changes have been applied
 
 Automatic console selection from DT. Console drivers can now use
 of_console_check() to see if the device node is specified as a console
 device. If so then it gets added as a preferred console. UART devices
 get this support automatically when uart_add_one_port() is called.
 
 DT unit tests no longer depend on pre-loaded data in the device tree.
 Data is loaded dynamically at the start of unit tests, and then unloaded
 again when the tests have completed.
 
 Also contains a few bugfixes for reserved regions and early memory setup.
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Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux

Pull device tree updates from Grant Likely:
 "The branch contains the following device tree changes the v3.17 merge
  window:

  Group changes to the device tree.  In preparation for adding device
  tree overlay support, OF_DYNAMIC is reworked so that a set of device
  tree changes can be prepared and applied to the tree all at once.
  OF_RECONFIG notifiers see the most significant change here so that
  users always get a consistent view of the tree.  Notifiers generation
  is moved from before a change to after it, and notifiers for a group
  of changes are emitted after the entire block of changes have been
  applied

  Automatic console selection from DT.  Console drivers can now use
  of_console_check() to see if the device node is specified as a console
  device.  If so then it gets added as a preferred console.  UART
  devices get this support automatically when uart_add_one_port() is
  called.

  DT unit tests no longer depend on pre-loaded data in the device tree.
  Data is loaded dynamically at the start of unit tests, and then
  unloaded again when the tests have completed.

  Also contains a few bugfixes for reserved regions and early memory
  setup"

* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux: (21 commits)
  of: Fixing OF Selftest build error
  drivers: of: add automated assignment of reserved regions to client devices
  of: Use proper types for checking memory overflow
  of: typo fix in __of_prop_dup()
  Adding selftest testdata dynamically into live tree
  of: Add todo tasklist for Devicetree
  of: Transactional DT support.
  of: Reorder device tree changes and notifiers
  of: Move dynamic node fixups out of powerpc and into common code
  of: Make sure attached nodes don't carry along extra children
  of: Make devicetree sysfs update functions consistent.
  of: Create unlocked versions of node and property add/remove functions
  OF: Utility helper functions for dynamic nodes
  of: Move CONFIG_OF_DYNAMIC code into a separate file
  of: rename of_aliases_mutex to just of_mutex
  of/platform: Fix of_platform_device_destroy iteration of devices
  of: Migrate of_find_node_by_name() users to for_each_node_by_name()
  tty: Update hypervisor tty drivers to use core stdout parsing code.
  arm/versatile: Add the uart as the stdout device.
  of: Enable console on serial ports specified by /chosen/stdout-path
  ...
2014-08-14 09:53:39 -06:00
Grant Likely
663d3f7c2e Merge branch 'devicetree/next-overlay' into devicetree/next
Conflicts:
	drivers/of/testcase-data/testcases.dts
2014-08-11 14:06:23 +01:00
Grant Likely
b775e642bf Merge branch 'devicetree/next-console' into devicetree/next 2014-08-11 14:03:08 +01:00
Linus Torvalds
e7fda6c4c3 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer and time updates from Thomas Gleixner:
 "A rather large update of timers, timekeeping & co

   - Core timekeeping code is year-2038 safe now for 32bit machines.
     Now we just need to fix all in kernel users and the gazillion of
     user space interfaces which rely on timespec/timeval :)

   - Better cache layout for the timekeeping internal data structures.

   - Proper nanosecond based interfaces for in kernel users.

   - Tree wide cleanup of code which wants nanoseconds but does hoops
     and loops to convert back and forth from timespecs.  Some of it
     definitely belongs into the ugly code museum.

   - Consolidation of the timekeeping interface zoo.

   - A fast NMI safe accessor to clock monotonic for tracing.  This is a
     long standing request to support correlated user/kernel space
     traces.  With proper NTP frequency correction it's also suitable
     for correlation of traces accross separate machines.

   - Checkpoint/restart support for timerfd.

   - A few NOHZ[_FULL] improvements in the [hr]timer code.

   - Code move from kernel to kernel/time of all time* related code.

   - New clocksource/event drivers from the ARM universe.  I'm really
     impressed that despite an architected timer in the newer chips SoC
     manufacturers insist on inventing new and differently broken SoC
     specific timers.

[ Ed. "Impressed"? I don't think that word means what you think it means ]

   - Another round of code move from arch to drivers.  Looks like most
     of the legacy mess in ARM regarding timers is sorted out except for
     a few obnoxious strongholds.

   - The usual updates and fixlets all over the place"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (114 commits)
  timekeeping: Fixup typo in update_vsyscall_old definition
  clocksource: document some basic timekeeping concepts
  timekeeping: Use cached ntp_tick_length when accumulating error
  timekeeping: Rework frequency adjustments to work better w/ nohz
  timekeeping: Minor fixup for timespec64->timespec assignment
  ftrace: Provide trace clocks monotonic
  timekeeping: Provide fast and NMI safe access to CLOCK_MONOTONIC
  seqcount: Add raw_write_seqcount_latch()
  seqcount: Provide raw_read_seqcount()
  timekeeping: Use tk_read_base as argument for timekeeping_get_ns()
  timekeeping: Create struct tk_read_base and use it in struct timekeeper
  timekeeping: Restructure the timekeeper some more
  clocksource: Get rid of cycle_last
  clocksource: Move cycle_last validation to core code
  clocksource: Make delta calculation a function
  wireless: ath9k: Get rid of timespec conversions
  drm: vmwgfx: Use nsec based interfaces
  drm: i915: Use nsec based interfaces
  timekeeping: Provide ktime_get_raw()
  hangcheck-timer: Use ktime_get_ns()
  ...
2014-08-05 17:46:42 -07:00
Gaurav Minocha
32147e9a8e of: Fixing OF Selftest build error
This patch is to fix following error while compiling OF selftests.
"drivers/of/selftest.c:617:2: error: implicit declaration of function
'of_fdt_unflatten_tree'"

Now, CONFIG_OF_SELFTEST depends on CONFIG_OF_EARLY_FLATTREE so that the
broken configuration cannot be selected. Ultimately it would be a good
idea to allow CONFIG_OF_SELFTEST to select CONFIG_OF_EARLY_FLATTREE, but
there is a dependency problem on i386 and x86_64 that causes dtc to not
get built and causes the build to fail. That problem needs to be fixed
first.

Signed-off-by: Gaurav Minocha <gaurav.minocha.os@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-08-03 12:21:28 -06:00