If the cxl_context_alloc() call fails, we return immediately without
releasing the reference on the AFU device, allowing it to leak.

This patch switches to using goto style error handling so that the
device is released in common code for both error paths, and will also
simplify things if we add additional initialisation in this function in
the future.
Signed-off-by: NIan Munsie <imunsie@au1.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

The config space of some PCI devices can't be accessed when their
PEs are in frozen state. Otherwise, fenced PHB might be seen.
Those PEs are identified with flag EEH_PE_CFG_RESTRICTED, meaing
EEH_PE_CFG_BLOCKED is set automatically when the PE is put to
frozen state (EEH_PE_ISOLATED). eeh_slot_error_detail() restores
PCI device BARs with eeh_pe_restore_bars(), which then calls
eeh_ops->restore_config() to reinitialize the PCI device in
(OPAL) firmware. eeh_ops->restore_config() produces PCI config
access that causes fenced PHB. The problem was reported on below
adapter:

   0001:01:00.0 0200: 14e4:168e (rev 10)
   0001:01:00.0 Ethernet controller: Broadcom Corporation \
                NetXtreme II BCM57810 10 Gigabit Ethernet (rev 10)

This fixes the issue by skipping eeh_pe_restore_bars() in
eeh_slot_error_detail() when EEH_PE_CFG_BLOCKED is set for the PE.

Fixes: b6541db1 ("powerpc/eeh: Block PCI config access upon frozen PE")
Cc: stable@vger.kernel.org # v4.0+
Reported-by: NManvanthara B. Puttashankar <mputtash@in.ibm.com>
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

This applies cleanup on pci_dn_reconfig_notifier(), no functional
changes:

   * Rename variable "pci" to "pdn" to indicate its purpose clearly.
   * The parent node can be released at any time. So it should be
     hold with of_get_parent() before accessing it.
   * The device node doesn't have to have parent node in theory.
     More check on this.
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Commit cca87d30 ("powerpc/pci: Refactor pci_dn") introduced pdn
list for SRIOV VFs. It means the pdn is be put into the child list
of its parent pdn when the pdn is created. When doing PCI hot
unplugging on pSeries, the PCI device node as well as its pdn are
released through procfs entry "powerpc/ofdt". Some one else grabs
the memory chunk of the pdn and update it accordingly. At the same
time, the pdn is still tracked in the child list of parent pdn. It
leads to corrupted child list in the parent pdn.

This fixes above issue by removing the pdn from the child list of
its parent pdn when the device node is detached from the system.
Note the pdn is free'd when the device node is released if the
device node is dynamic one. Otherwise, the device node as well
as the pdn won't be released.

Fixes: cca87d30 ("powerpc/pci: Refactor pci_dn")
Cc: stable@vger.kernel.org # 4.1+
Reported-by: NSantwana Samantray <santwana.samantray@in.ibm.com>
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Freescale updates from Scott:

"Highlights include 32-bit memcpy/memset optimizations, checksum
optimizations, 85xx config fragments and updates, device tree updates,
e6500 fixes for non-SMP, and misc cleanup and minor fixes."

Commit 84ad6e5c added LEDS support for PowerNV platform. Lets
update ppc64_defconfig to pick LEDS driver.

PowerNV LEDS driver looks for "/ibm,opal/leds" node in device
tree and loads if this node exists. Hence added it as 'm'.

Also note that powernv LEDS driver needs NEW_LEDS and LEDS_CLASS
as well. Hence added them to config file.

mpe: Also add them to pseries_defconfig, which is currently also used
for powernv systems.
Suggested-by: NMichael Ellerman <mpe@ellerman.id.au>
Signed-off-by: NVasant Hegde <hegdevasant@linux.vnet.ibm.com>
Cc: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Commit e91c2511 "powerpc/iommu: Cleanup setting of DMA base/offset"
expects that the default DMA offset is set from pnv_ioda_setup_bus_dma()
which is correct unless it is SRIOV where the code flow is different -
at the moment when pnv_ioda_setup_bus_dma() is called, PCI devices for
VFs are not created yet.

This adds missing set_dma_offset() to pnv_pci_ioda_dma_dev_setup() to
cover the case of SRIOV.

Note that we still need set_dma_offset() in pnv_ioda_setup_bus_dma() as
at the boot time pnv_pci_ioda_dma_dev_setup() is called when no PE was
created yet, this happens at the PHB fixup stage.

Fixes: e91c2511 ("powerpc/iommu: Cleanup setting of DMA base/offset")
Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

cxl_reset currently PERSTs the slot, and then repeatedly tries to
read MMIO space in order to kick off EEH.

There are 2 problems with this: it's unnecessary, and it's racy.

It's unnecessary because the PERST will bring down the PHB link.
That will be picked up by the CAPP, which will send out an HMI.
Skiboot, noticing an HMI from the CAPP, will send an OPAL
notification to the kernel, which will trigger EEH recovery.

It's also racy: the EEH recovery triggered by the CAPP will
eventually cause the MMIO space to have its mapping invalidated
and the pointer NULLed out. This races with our attempt to read
the MMIO space. This is causing OOPSes in testing.

Simply drop all the attempts to force EEH detection, and trust
that Skiboot will send the notification and that we'll act on it.
The Skiboot code to send the EEH notification has been in Skiboot
for as long as CAPP recovery has been supported, so we don't need
to worry about breaking obscure setups with ancient firmware.

Cc: Ryan Grimm <grimm@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
Fixes: 62fa19d4 ("cxl: Add ability to reset the card")
Signed-off-by: NDaniel Axtens <dja@axtens.net>
Acked-by: NIan Munsie <imunsie@au1.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

This minor patch plugs a potential irq leak in case of a memory
allocation failure inside function the afu_allocate_irqs. Presently the
irqs allocated to the context gets leaked if allocation of either
one of context irq_bitmap or irq_names fails.
Signed-off-by: NVaibhav Jain <vaibhav@linux.vnet.ibm.com>
Acked-by: NIan Munsie <imunsie@au1.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Macro DEFINE_PCI_DEVICE_TABLE is deprecated. So, here use
struct pci_device_id instead of DEFINE_PCI_DEVICE_TABLE with
the goal of getting rid of this macro completely.

The Coccinelle semantic patch that performs this transformation
is as follows:

@@
identifier a;
declarer name DEFINE_PCI_DEVICE_TABLE;
initializer i;
@@
- DEFINE_PCI_DEVICE_TABLE(a)
+ const struct pci_device_id a[]
= i;
Signed-off-by: NVaishali Thakkar <vthakkar1994@gmail.com>
Acked-by: NMichael Neuling <mikey@neuling.org>
Acked-by: NIan Munsie <imunsie@au1.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

When I merged the OPAL support for the powernv LEDS driver I missed a
hunk.

This is slightly modified from the original patch, as the original added
code to opal-api.h which is not in the skiboot version, which is
discouraged.

Instead those values are moved into the driver, which is the only place
they are used.

Fixes: 8a8d9181 ("powerpc/powernv: Add OPAL interfaces for accessing and modifying system LED states")
Reviewed-by: NVasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

On powernv secondary cpus are returned to OPAL, and will then enter
the target kernel in big-endian. However if it is set the HILE bit
will persist, causing the first exception in the target kernel to be
delivered in litte-endian regardless of the current endianness.

If running on top of OPAL make sure the HILE bit is reset once we've
finished waiting for all of the secondaries to be returned to OPAL.
Signed-off-by: NSamuel Mendoza-Jonas <sam.mj@au1.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

If the target kernel does not inlcude the FIXUP_ENDIAN check, coming
from a different-endian kernel will cause the target kernel to panic.
All ppc64 kernels can handle starting in big-endian mode, so return to
big-endian before branching into the target kernel.

This mainly affects pseries as secondaries on powernv are returned to
OPAL.
Signed-off-by: NSamuel Mendoza-Jonas <sam.mj@au1.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

This patch fixes several endianness issues detected when running the HVSI
driver in little endian mode.

These issues are raised in little endian mode because the data exchanged in
memory between the kernel and the hypervisor has to be in big endian
format. This exhibits as errors such as:

  irq: (null) didn't like hwirq-0x1000a00 to VIRQ16 mapping (rc=-22)
  hvsi_console_init: couldn't create irq mapping for 0x1000a00

The data structures already have endian annotations, and sparse is
generating numerous warnings based on those. This commit fixes all of
them.
Signed-off-by: NLaurent Dufour <ldufour@linux.vnet.ibm.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: Jiri Slaby <jslaby@suse.cz>
CC: linuxppc-dev@lists.ozlabs.org
CC: linux-kernel@vger.kernel.org
[mpe: Flesh out change log]
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

This patch implements LED driver for PowerNV platform using the existing
generic LED class framework.

PowerNV platform has below type of LEDs:
  - System attention
      Indicates there is a problem with the system that needs attention.
  - Identify
      Helps the user locate/identify a particular FRU or resource in the
      system.
  - Fault
      Indicates there is a problem with the FRU or resource at the
      location with which the indicator is associated.

We register classdev structures for all individual LEDs detected on the
system through LED specific device tree nodes. Device tree nodes specify
what all kind of LEDs present on the same location code. It registers
LED classdev structure for each of them.

All the system LEDs can be found in the same regular path /sys/class/leds/.
We don't use LED colors. We use LED node and led-types property to form
LED classdev. Our LEDs have names in this format.

        <location_code>:<attention|identify|fault>

Any positive brightness value would turn on the LED and a zero value would
turn off the LED. The driver will return LED_FULL (255) for any turned on
LED and LED_OFF (0) for any turned off LED.

The platform level implementation of LED get and set state has been
achieved through OPAL calls. These calls are made available for the
driver by exporting from architecture specific codes.
Signed-off-by: NVasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: NAnshuman Khandual <khandual@linux.vnet.ibm.com>
Acked-by: NStewart Smith <stewart@linux.vnet.ibm.com>
Tested-by: NStewart Smith <stewart@linux.vnet.ibm.com>
Acked-by: NJacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

This patch adds platform devices for leds. Also export LED related
OPAL API's so that led driver can use these APIs.
Signed-off-by: NVasant Hegde <hegdevasant@linux.vnet.ibm.com>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

This patch registers the following two new OPAL interfaces calls
for the platform LED subsystem. With the help of these new OPAL calls,
the kernel will be able to get or set the state of various individual
LEDs on the system at any given location code which is passed through
the LED specific device tree nodes.

	(1) OPAL_LEDS_GET_INDICATOR     opal_leds_get_ind
	(2) OPAL_LEDS_SET_INDICATOR     opal_leds_set_ind
Signed-off-by: NAnshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: NVasant Hegde <hegdevasant@linux.vnet.ibm.com>
Acked-by: NStewart Smith <stewart@linux.vnet.ibm.com>
Tested-by: NStewart Smith <stewart@linux.vnet.ibm.com>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

On powernv platform, IOV BAR would be shifted if necessary. While the log
message is not correct when disabling VFs.

This patch fixes this by print correct message based on the offset value.
Signed-off-by: NWei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

If we open a context but do not start it (either because we do not attempt
to start it, or because it fails to start for some reason), we are left
with a context in state OPENED. Previously, cxl_release_context() only
allowed releasing contexts in state CLOSED, so attempting to release an
OPENED context would fail.

In particular, this bug causes available contexts to run out after some EEH
failures, where drivers attempt to release contexts that have failed to
start.

Allow releasing contexts in any state with a value lower than STARTED, i.e.
OPENED or CLOSED (we can't release a STARTED context as it's currently
using the hardware, and we assume that contexts in any new states which may
be added in future with a value higher than STARTED are also unsafe to
release).

Cc: stable@vger.kernel.org
Fixes: 6f7f0b3d ("cxl: Add AFU virtual PHB and kernel API")
Signed-off-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: NDaniel Axtens <dja@axtens.net>
Acked-by: NIan Munsie <imunsie@au1.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

The I2C core always reports the MODALIAS uevent as "i2c:<client name"
regardless if the driver was matched using the I2C id_table or the
of_match_table. So technically there's no need for a driver to export
the OF table since currently it's not used.

In fact, the I2C device ID table is mandatory for I2C drivers since
a i2c_device_id is passed to the driver's probe function even if the
I2C core used the OF table to match the driver.

And since the I2C core uses different tables, OF-only drivers needs to
have duplicated data that has to be kept in sync and also the dev node
compatible manufacturer prefix is stripped when reporting the MODALIAS.

To avoid the above, the I2C core behavior may be changed in the future
to not require an I2C device table for OF-only drivers and report the
OF module alias. So, it's better to also export the OF table to prevent
breaking module autoloading if that happens.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

The I2C core always reports the MODALIAS uevent as "i2c:<client name"
regardless if the driver was matched using the I2C id_table or the
of_match_table. So the driver needs to export the I2C table and this
be built into the module or udev won't have the necessary information
to auto load the correct module when the device is added.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

the PPC_MPC512x config automatically selected USB_EHCI_BIG_ENDIAN_*
switches, which made Kconfig warn about "unmet direct dependencies":

  scripts/kconfig/conf --silentoldconfig Kconfig
  warning: (PPC_MPC512x && 440EPX) selects USB_EHCI_BIG_ENDIAN_DESC which has unmet direct dependencies (USB_SUPPORT && USB && USB_EHCI_HCD)
  warning: (PPC_MPC512x && PPC_PS3 && PPC_CELLEB && 440EPX) selects USB_EHCI_BIG_ENDIAN_MMIO which has unmet direct dependencies (USB_SUPPORT && USB && USB_EHCI_HCD)
  warning: (PPC_MPC512x && 440EPX) selects USB_EHCI_BIG_ENDIAN_DESC which has unmet direct dependencies (USB_SUPPORT && USB && USB_EHCI_HCD)
  warning: (PPC_MPC512x && PPC_PS3 && PPC_CELLEB && 440EPX) selects USB_EHCI_BIG_ENDIAN_MMIO which has unmet direct dependencies (USB_SUPPORT && USB && USB_EHCI_HCD)

make the selected entries additionally depend on USB_EHCI_HCD which
silences the warning
Signed-off-by: NGerhard Sittig <gsi@denx.de>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Pstore only supports one backend at a time. The preferred
pstore backend is set by passing the pstore.backend=<name>
argument to the kernel at boot time. Currently, while trying
to register with pstore, nvram throws an error message even
when "pstore.backend != nvram", which is unnecessary. This
patch removes the error message in case "pstore.backend != nvram".
Signed-off-by: NHari Bathini <hbathini@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

userspace programs using cxl currently have to use two strategies for
dealing with MMIO errors simultaneously. They have to check every read
for a return of all Fs in case the adapter has gone away and the kernel
has not yet noticed, and they have to deal with SIGBUS in case the
kernel has already noticed, invalidated the mapping and marked the
context as failed.

In order to simplify things, this patch adds an alternative approach
where the kernel will return a page filled with Fs instead of delivering
a SIGBUS. This allows userspace to only need to deal with one of these
two error paths, and is intended for use in libraries that use cxl
transparently and may not be able to safely install a signal handler.

This approach will only work if certain constraints are met. Namely, if
the application is both reading and writing to an address in the problem
state area it cannot assume that a non-FF read is OK, as it may just be
reading out a value it has previously written. Further - since only one
page is used per context a write to a given offset would be visible when
reading the same offset from a different page in the mapping (this only
applies within a single context, not between contexts).

An application could deal with this by e.g. making sure it also reads
from a read-only offset after any reads to a read/write offset.

Due to these constraints, this functionality must be explicitly
requested by userspace when starting the context by passing in the
CXL_START_WORK_ERR_FF flag.
Signed-off-by: NIan Munsie <imunsie@au1.ibm.com>
Acked-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

The patch was generated using fixed coccinelle semantic patch
scripts/coccinelle/api/memdup.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2014320Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com>
Reviewed-by: NNathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

The patch was generated using fixed coccinelle semantic patch
scripts/coccinelle/api/memdup.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2014320Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com>
Reviewed-by: NNathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

pcibios_set_pcie_reset_state() could be called to complete
reset request when passing through PCI device, flag
EEH_PE_ISOLATED is set before saving the PCI config sapce.
On some Broadcom adapters, EEH_PE_CFG_BLOCKED is automatically
set when the flag EEH_PE_ISOLATED is marked. It caused bogus
data saved from the PCI config space, which will be restored
to the PCI adapter after the reset. Eventually, the hardware
can't work with corrupted data in PCI config space.

The patch fixes the issue with eeh_pe_state_mark_no_cfg(), which
doesn't set EEH_PE_CFG_BLOCKED when seeing EEH_PE_ISOLATED on the
PE, in order to avoid the bogus data saved and restored to the PCI
config space.
Reported-by: NRajanikanth H. Adaveeshaiah <rajanikanth.ha@in.ibm.com>
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

This adds include/uapi/asm/eeh.h to kbuild so that the header
file will be exported automatically with below command. The
header file was added by commit ed3e81ff ("powerpc/eeh: Move PE
state constants around")

   make INSTALL_HDR_PATH=/tmp/headers \
        SRCARCH=powerpc headers_install
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

A working rtc kernel driver is needed so that hwclock can synchronize
system clock to rtc during shutdown/boot. We already have a powernv
platform rtc driver located at drivers/rtc/rtc-opal.c. However it depends
on CONFIG_RTC_CLASS which is disabled by default. Hence the driver isn't
enabled and not compiled for the powernv kernel.

We fix this by enabling rtc class support in pseries defconfig which
enables this driver and compiles it into the pseries kernel. In case
CONFIG_PPC_POWERNV is not enabled we fallback to 'Generic RTC support'
driver which emulates the legacy 'PC RTC driver'.
Signed-off-by: NVaibhav Jain <vaibhav@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

In some situations, a NUMA guest that supports
ibm,dynamic-memory-reconfiguration node will end up having flat NUMA
distances between nodes. This is because of two problems in the
current code.

1) Different representations of associativity lists.

   There is an assumption about the associativity list in
   initialize_distance_lookup_table(). Associativity list has two forms:

   a) [cpu,memory]@x/ibm,associativity has following
      format:
           <N> <N integers>

   b) ibm,dynamic-reconfiguration-memory/ibm,associativity-lookup-arrays

           <M> <N> <M associativity lists each having N integers>
           M = the number of associativity lists
           N = the number of entries per associativity list

   Fix initialize_distance_lookup_table() so that it does not assume
   "case a". And update the caller to skip the length field before
   sending the associativity list.

2) Distance table not getting updated from drconf path.

   Node distance table will not get initialized in certain cases as
   ibm,dynamic-reconfiguration-memory path does not initialize the
   lookup table.

   Call initialize_distance_lookup_table() from drconf path with
   appropriate associativity list.
Reported-by: NBharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: NNikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Acked-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Simplify the dma_get_required_mask call chain by moving it from pnv_phb to
pci_controller_ops, similar to commit 763d2d8d ("powerpc/powernv:
Move dma_set_mask from pnv_phb to pci_controller_ops").

Previous call chain:

  0) call dma_get_required_mask() (kernel/dma.c)
  1) call ppc_md.dma_get_required_mask, if it exists. On powernv, that
     points to pnv_dma_get_required_mask() (platforms/powernv/setup.c)
  2) device is PCI, therefore call pnv_pci_dma_get_required_mask()
     (platforms/powernv/pci.c)
  3) call phb->dma_get_required_mask if it exists
  4) it only exists in the ioda case, where it points to
       pnv_pci_ioda_dma_get_required_mask() (platforms/powernv/pci-ioda.c)

New call chain:

  0) call dma_get_required_mask() (kernel/dma.c)
  1) device is PCI, therefore call pci_controller_ops.dma_get_required_mask
     if it exists
  2) in the ioda case, that points to pnv_pci_ioda_dma_get_required_mask()
     (platforms/powernv/pci-ioda.c)

In the p5ioc2 case, the call chain remains the same -
dma_get_required_mask() does not find either a ppc_md call or
pci_controller_ops call, so it calls __dma_get_required_mask().
Signed-off-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com>
Reviewed-by: NDaniel Axtens <dja@axtens.net>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

The relation between CONFIG_PPC_HAS_HASH_64K and CONFIG_PPC_64K_PAGES is
painfully complicated.

But if we rearrange it enough we can see that PPC_HAS_HASH_64K
essentially depends on PPC_STD_MMU_64 && PPC_64K_PAGES.

We can then notice that PPC_HAS_HASH_64K is used in files that are only
built for PPC_STD_MMU_64, meaning it's equivalent to PPC_64K_PAGES.

So replace all uses and drop it.
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
Reviewed-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

For config options with only a single value, guarding the single value
with 'if' is the same as adding a 'depends' statement. And it's more
standard to just use 'depends'.

And if the option has both an 'if' guard and a 'depends' we can collapse
them into a single 'depends' by combining them with &&.
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
Reviewed-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

Now that support for 64k pages with a 4K kernel is removed, this code is
unreachable.

CONFIG_PPC_HAS_HASH_64K can only be true when CONFIG_PPC_64K_PAGES is
also true.

But when CONFIG_PPC_64K_PAGES is true we include pte-hash64.h which
includes pte-hash64-64k.h, which defines both pte_pagesize_index() and
crucially __real_pte, which means this definition can never be used.
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
Reviewed-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

Back in the olden days we added support for using 64K pages to map the
SPU (Synergistic Processing Unit) local store on Cell, when the main
kernel was using 4K pages.

This was useful at the time because distros were using 4K pages, but
using 64K pages on the SPUs could reduce TLB pressure there.

However these days the number of Cell users is approaching zero, and
supporting this option adds unpleasant complexity to the memory
management code.

So drop the option, CONFIG_SPU_FS_64K_LS, and all related code.
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
Acked-by: NJeremy Kerr <jk@ozlabs.org>

The powerpc kernel can be built to have either a 4K PAGE_SIZE or a 64K
PAGE_SIZE.

However when built with a 4K PAGE_SIZE there is an additional config
option which can be enabled, PPC_HAS_HASH_64K, which means the kernel
also knows how to hash a 64K page even though the base PAGE_SIZE is 4K.

This is used in one obscure configuration, to support 64K pages for SPU
local store on the Cell processor when the rest of the kernel is using
4K pages.

In this configuration, pte_pagesize_index() is defined to just pass
through its arguments to get_slice_psize(). However pte_pagesize_index()
is called for both user and kernel addresses, whereas get_slice_psize()
only knows how to handle user addresses.

This has been broken forever, however until recently it happened to
work. That was because in get_slice_psize() the large kernel address
would cause the right shift of the slice mask to return zero.

However in commit 7aa0727f ("powerpc/mm: Increase the slice range to
64TB"), the get_slice_psize() code was changed so that instead of a
right shift we do an array lookup based on the address. When passed a
kernel address this means we index way off the end of the slice array
and return random junk.

That is only fatal if we happen to hit something non-zero, but when we
do return a non-zero value we confuse the MMU code and eventually cause
a check stop.

This fix is ugly, but simple. When we're called for a kernel address we
return 4K, which is always correct in this configuration, otherwise we
use the slice mask.

Fixes: 7aa0727f ("powerpc/mm: Increase the slice range to 64TB")
Reported-by: NCyril Bur <cyrilbur@gmail.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
Reviewed-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

IFC NAND chip select is wrongly mapped to 2 in reg property of
NAND node. Due to this kernel is not able probe NAND flash. Set
chip select to 1 in reg property.
Signed-off-by: NJaiprakash Singh <b44839@freescale.com>
Signed-off-by: NShengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

Signed-off-by: NWang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

SCFG provides SoC specific configuration and status registers for
the chip. Add this for powerpc platform.
Signed-off-by: NWang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

T1040D4RDB/T1042D4RDB are Freescale Reference Design Board
which can support T1040/T1042 QorIQ Power
Architecture™ processor respectively

T1040D4RDB/T1042D4RDB board Overview
-------------------------------------
- SERDES Connections, 8 lanes supporting:
        - PCI
        - SGMII
        - SATA 2.0
        - QSGMII(only for T1040D4RDB)
    - DDR Controller
        - Supports rates of up to 1600 MHz data-rate
        - Supports one DDR4 UDIMM
    -IFC/Local Bus
        - NAND flash: 1GB 8-bit NAND flash
        - NOR: 128MB 16-bit NOR Flash
    - Ethernet
        - Two on-board RGMII 10/100/1G ethernet ports.
        - PHY #0 remains powered up during deep-sleep
    - CPLD
    - Clocks
        - System and DDR clock (SYSCLK, “DDRCLK”)
        - SERDES clocks
    - Power Supplies
    - USB
        - Supports two USB 2.0 ports with integrated PHYs
        - Two type A ports with 5V@1.5A per port.
    - SDHC
        - SDHC/SDXC connector
    - SPI
        - On-board 64MB SPI flash
    - I2C
        - Devices connected: EEPROM, thermal monitor, VID controller
    - Other IO
        - Two Serial ports
        - ProfiBus port

    Add support for T1040/T1042D4RDB board:
    -add device tree
    -Add entry in corenet_generic.c
Signed-off-by: NPriyanka Jain <Priyanka.Jain@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>