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>

The c293pcie board is an endpoint device and it doesn't need PM,
so remove hooks pcibios_fixup_phb and pcibios_fixup_bus.
Signed-off-by: NHou Zhiqiang <B48286@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

It makes no sense to put the instructions for calculating the lock
value (cpu number + 1) and the clearing of eq bit of cr1 in lbarx/stbcx
loop. And when the lock is acquired by the other thread, the current
lock value has no chance to equal with the lock value used by current
cpu. So we can skip the comparing for these two lock values in the
lbz/bne loop.
Signed-off-by: NKevin Hao <haokexin@gmail.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

Since we moved the "lock" to be the first element of
struct tlb_core_data in commit 82d86de2 ("powerpc/e6500: Make TLB
lock recursive"), this macro is not used by any code. Just delete it.
Signed-off-by: NKevin Hao <haokexin@gmail.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

In u-boot, when set the video as console, the name 'vga' is used
as a general name for the video device, during the fdt_fixup_stdout
process, the 'vga' name is used to search in the dtb to setup the
'linux,stdout-path' node. Though the P1022 DIU is not VGA-compatible
device, to meet the 'vga' name used in u-boot, the vga alias node is
added for P1022 in this patch. At the same time, a display alias is
also added so that no other components grow dependencies on the vga
alias node.
Signed-off-by: NJason Jin <Jason.Jin@freescale.com>
Signed-off-by: NWang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

In CoreNet systems it is not allowed to mix M and non-M mappings to the
same memory, and coherent DMA accesses are considered to be M mappings
for this purpose.  Ignoring this has been observed to cause hard
lockups in non-SMP kernels on e6500.

Furthermore, e6500 implements the LRAT (logical to real address table)
which allows KVM guests to control the WIMGE bits.  This means that
KVM cannot force the M bit on the way it usually does, so the guest had
better set it itself.
Signed-off-by: NScott Wood <scottwood@freescale.com>

map_kernel() doesn't catch all places that create kernel PTEs.  In
particular, vmalloc() calls set_pte_at() directly.  This causes a
crash when booting a non-SMP kernel on e6500.

Move the sync to __set_pte(), to be executed only for kernel addresses.
Signed-off-by: NScott Wood <scottwood@freescale.com>

IFC IO accressor are set at run time based
on IFC IP registers endianness.IFC node in
DTS file contains information about
endianness.
Signed-off-by: NJaiprakash Singh <b44839@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>
Acked-by: NBrian Norris <computersforpeace@gmail.com>

Aquantia PHYs used on platforms such as T2080RDB, T1024RDB.
Signed-off-by: NShaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

The PHY uses XAUI interface to connect to MAC, mostly the PHY used on
riser card.
Signed-off-by: NShaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

Add support for INA220 current sensor.
Signed-off-by: NShengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

Add support for INA220 current sensor.
Signed-off-by: NShengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

This patch adds a few optimisations in memcpy functions by using
lbzu/stbu instead of lxb/stb and by re-ordering insn inside a loop
to reduce latency due to loading
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: NScott Wood <scottwood@freescale.com>

cacheable_memcpy uses dcbz instruction and is more efficient than
memcpy when the destination is in RAM. If the destination is in an
io area, memcpy_toio() is normally used, not memcpy

This patch renames memcpy as generic_memcpy, and renames
cacheable_memcpy as memcpy

On MPC885, we get approximatly 7% increase of the transfer rate
on an FTP reception
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: NScott Wood <scottwood@freescale.com>

cacheable_memzero() which has become the new memset() and the old
memset() are quite similar, so just merge them.
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: NScott Wood <scottwood@freescale.com>

cacheable_memzero uses dcbz instruction and is more efficient than
memset(0) when the destination is in RAM

This patch renames memset as generic_memset, and defines memset
as a prolog to cacheable_memzero. This prolog checks if the byte
to set is 0. If not, it falls back to generic_memcpy()

cacheable_memzero disappears as it is not referenced anywhere anymore
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: NScott Wood <scottwood@freescale.com>

This partially reverts
commit 'powerpc: Remove duplicate cacheable_memcpy/memzero functions
("b05ae4ee")'

Functions cacheable_memcpy/memzero are more efficient than
memcpy/memset as they use the dcbz instruction which avoids refill
of the cacheline with the data that we will overwrite.
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: NScott Wood <scottwood@freescale.com>

CPM muram is not cached, so use memset_io() instead of memset()
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: NScott Wood <scottwood@freescale.com>

__flush_dcache_icache_phys() requires the ability to access the
memory with the MMU disabled, which means that on a 32-bit system
any memory above 4 GiB is inaccessible.  In particular, mpc86xx is
32-bit and can have more than 4 GiB of RAM.
Signed-off-by: NScott Wood <scottwood@freescale.com>

The C version of csum_add() as defined in include/net/checksum.h gives
the following assembly in ppc32:
       0:       7c 04 1a 14     add     r0,r4,r3
       4:       7c 64 00 10     subfc   r3,r4,r0
       8:       7c 63 19 10     subfe   r3,r3,r3
       c:       7c 63 00 50     subf    r3,r3,r0
and the following in ppc64:
   0xc000000000001af8 <+0>:	add     r3,r3,r4
   0xc000000000001afc <+4>:	cmplw   cr7,r3,r4
   0xc000000000001b00 <+8>:	mfcr    r4
   0xc000000000001b04 <+12>:	rlwinm  r4,r4,29,31,31
   0xc000000000001b08 <+16>:	add     r3,r4,r3
   0xc000000000001b0c <+20>:	clrldi  r3,r3,32
   0xc000000000001b10 <+24>:	blr

include/net/checksum.h also offers the possibility to define an arch
specific function.  This patch provides a specific csum_add() inline
function.
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: NScott Wood <scottwood@freescale.com>

csum_tcpudp_magic() is only a few instructions, and does modify
really few registers. So it is not worth having it as a separate
function and suffer function branching and saving of volatile
registers.

This patch makes it inline by use of the already existing
csum_tcpudp_nofold() function.
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: NScott Wood <scottwood@freescale.com>

Unify mpc85xx and corenet configs using fragments, to ease maintenance
and avoid the sort of drift that the previous patch fixed.

Hardware and software options are separated, with the hope that other
embedded platforms could share the software options, and to make it
easier to maintain custom/alternate configs that focus on either
hardware or software options.

Due to the previous patch, this patch should not affect the results of
any of the affected defconfigs -- only how those results are achieved.
The resulting config is more or less the union of the options that any
of the configs previously selected.  No attempt was made in this (or
the previous) patch to edit out questionable options, but this patch
will make it easier to do so in future patches.
Signed-off-by: NScott Wood <scottwood@freescale.com>

The mpc85xx and corenet configs have many differences between them that
can't be explained by the target hardware of each config.  The next
patch will consolidate these targets using kconfig fragments; this
patch shows what the resulting defconfigs will look like (generated by
using savedefconfig on a fragment-generated config).
Signed-off-by: NScott Wood <scottwood@freescale.com>

corenet32_smp_defconfig is missing some things that modern distros
require, enable them.
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
Signed-off-by: NScott Wood <scottwood@freescale.com>

By default we enable DMA(CONFIG_FSL_DMA) support
which are needed on P2041RDB, P3041DS, P4080DS,
B4860QDS, etc.
Signed-off-by: NYuan Yao <yao.yuan@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

Signed-off-by: NYangbo Lu <yangbo.lu@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

When detecting EEH error on non-existing PE, including the reserved
one, the PE is simply unfrozen without dumping the PHB diag-data,
which is useful for locating the root cause of the EEH error. The
patch dumps the PHB diag-data when non-existing PE reports error.
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

On LE kernel, the non-existing PE number in BE format derived from
skiboot firmware isn't converted to LE format properly as following
kernel log indicates:

   EEH: Clear non-existing PHB#4-PE#200000000000000
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

This patch adds one helper function 'sigcontext_vmx_regs' which computes
quad word aligned pointer for 'vmx_reserve' array element in sigcontext
structure making the code more readable.
Signed-off-by: NAnshuman Khandual <khandual@linux.vnet.ibm.com>
[mpe: Reword comment and fix build for CONFIG_ALTIVEC=n]
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Commit ce48b210 "powerpc: Add VSX context save/restore, ptrace and
signal support" expanded the 'vmx_reserve' array element to contain 101
double words, but the comment block above was not updated.

Also reorder the constants in the array size declaration to reflect the
logic mentioned in the comment block above. This change helps in
explaining how the HW registers are represented in the array. But no
functional change.
Signed-off-by: NAnshuman Khandual <khandual@linux.vnet.ibm.com>
[mpe: Reworded change log and added whitespace around +'s]
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Currently tm_orig_msr is getting used during process context switch only.
Then there is ckpt_regs which saves the checkpointed userspace context
The MSR slot contained in ckpt_regs structure can be used during process
context switch instead of tm_orig_msr, thus allowing us to drop it from
thread_struct structure. This patch does that change.
Acked-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NAnshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Destroy afu->contexts_idr on release of an afu, reclaiming the allocated
memory.
Signed-off-by: NJohannes Thumshirn <jthumshirn@suse.de>
Acked-by: NIan Munsie <imunsie@au1.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Destroy cxl_adapter_idr on module exit, reclaiming the allocated memory.

This was detected by the following semantic patch (written by Luis Rodriguez
<mcgrof@suse.com>)
<SmPL>
@ defines_module_init @
declarer name module_init, module_exit;
declarer name DEFINE_IDR;
identifier init;
@@

module_init(init);

@ defines_module_exit @
identifier exit;
@@

module_exit(exit);

@ declares_idr depends on defines_module_init && defines_module_exit @
identifier idr;
@@

DEFINE_IDR(idr);

@ on_exit_calls_destroy depends on declares_idr && defines_module_exit @
identifier declares_idr.idr, defines_module_exit.exit;
@@

exit(void)
{
 ...
 idr_destroy(&idr);
 ...
}

@ missing_module_idr_destroy depends on declares_idr && defines_module_exit && !on_exit_calls_destroy @
identifier declares_idr.idr, defines_module_exit.exit;
@@

exit(void)
{
 ...
 +idr_destroy(&idr);
}
</SmPL>
Signed-off-by: NJohannes Thumshirn <jthumshirn@suse.de>
Acked-by: NIan Munsie <imunsie@au1.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

This patch adds support for OPAL EPOW (Environmental and Power Warnings)
and DPO (Delayed Power Off) events for the PowerNV platform. These events
are generated on FSP (Flexible Service Processor) based systems. EPOW
events are generated due to various critical system conditions that
require system shutdown. A few examples of these conditions are high
ambient temperature or system running on UPS power with low UPS battery.
DPO event is generated in response to admin initiated system shutdown
request. Upon receipt of EPOW and DPO events the host kernel invokes
orderly_poweroff() for performing graceful system shutdown.
Signed-off-by: NVipin K Parashar <vipin@linux.vnet.ibm.com>
Acked-by: NVaibhav Jain <vaibhav@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

When releasing PE for SRIOV VF, the PE is forced to be frozen
wrongly. When the same PE is picked for another VF, it won't
work anyhow. The patch fixes the issue by unfreezing, not
freezing the VF PE when releasing it.
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

The PELTV of PF PE should include VF PE, which is missed by current
code, so that the VF PE is frozen automatically when freezing PF PE.
The patch fixes the PELTV of PF PE to include VF PE.
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

On PHB3, PE might be reserved in advance to reflect the M64 segments
consumed by the PE according to M64 BARs (exclude VF BARs) of the PCI
devices included in the PE. The PE is picked based on M64 BARs instead
of the bridge's M64 windows, which might include VF BARs. Otherwise,
wrong PE could be picked.

The patch calculates the used M64 segments and PE numbers according to
the M64 BARs, excluding VF BARs, of PCI devices in one particular PE,
instead of the bridge's M64 windows. Then the right PE number is picked.
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

The patch changes the type of last argument of pnv_ioda_setup_bus_PE()
and phb::pick_m64_pe() to boolean. No functional change.
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

On PHB3, some PEs might be reserved in advance to reflect the M64
segments consumed by those PEs. We're reserving PEs based on the
M64 window of root port, which might contain VF BAR. The PEs for
VFs are allocated dynamically, not reserved based on the consumed
M64 segments. So the M64 window of root port isn't reliable for
the task. Instead, we go through M64 BARs (VF BARs excluded) of
PCI devices under the specified root bus and reserve PEs accordingly,
as the patch does.
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>