This driver uses the services provided by the BPMP firmware driver to
implement a reset driver based on the MRQ_RESET request.
Acked-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: NThierry Reding <treding@nvidia.com>

The Boot and Power Management Processor (BPMP) is a co-processor found
on Tegra SoCs. It is designed to handle the early stages of the boot
process and offload power management tasks (such as clocks, resets,
powergates, ...) as well as system control services.

Compared to the ARM SCPI, the services provided by BPMP are message-
based rather than method-based. The BPMP firmware driver provides the
services to transmit data to and receive data from the BPMP. Users can
also register a Message ReQuest (MRQ), for which a service routine will
be run when a corresponding event is received from the firmware.

A set of messages, called the BPMP ABI, are specified for a number of
different services provided by the BPMP (such as clocks or resets).

Based on work by Sivaram Nair <sivaramn@nvidia.com> and Joseph Lo
<josephl@nvidia.com>.
Signed-off-by: NThierry Reding <treding@nvidia.com>

The Inter-VM communication (IVC) is a communication protocol which is
designed for interprocessor communication (IPC) or the communication
between the hypervisor and the virtual machine with a guest OS.

Message channels are used to communicate between processors. They are
backed by DRAM or SRAM, so care must be taken to maintain coherence of
data.

The IVC library maintains memory-based descriptors for the transmission
and reception channels as well as the data coherence of the counter and
payload. Clients, such as the driver for the BPMP firmware, can use the
library to exchange messages with remote processors.

Based on work by Peter Newman <pnewman@nvidia.com> and Joseph Lo
<josephl@nvidia.com>.
Signed-off-by: NThierry Reding <treding@nvidia.com>

We have to use the _safe version of list_for_each() because we're
freeing the pointer as we go along.  (This might not show up testing
depending on what config options you have enabled).

Fixes: 0fe88461 ("mailbox: Add Tegra HSP driver")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

This driver exposes a mailbox interface for interprocessor communication
using the Hardware Synchronization Primitives (HSP) module's doorbell
mechanism. There are multiple HSP instances and they provide additional
features such as shared mailboxes, shared and arbitrated semaphores.

A driver for a remote processor can use the mailbox client provided by
the HSP driver and build an IPC protocol on top of this synchronization
mechanism.

Based on work by Joseph Lo <josephl@nvidia.com>.
Acked-by: NJassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: NThierry Reding <treding@nvidia.com>

The Tegra186 features a combination of Denver and Cortex-A57 CPU cores
and a GPU based on the Pascal architecture. It contains an ADSP with a
Cortex-A9 CPU used for audio processing, hardware video encoders and
decoders with multi-format support, ISP for image capture processing
and BPMP for power management.
Signed-off-by: NJoseph Lo <josephl@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

Add error handling support.
Register ib device with ib stack.
Signed-off-by: NRajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Add support for GSI over light L2.
Signed-off-by: NRajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Add light L2 interface for RoCE.
Signed-off-by: NRajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Implement fastpath verbs like ib_send_post, ib_post_recv and ib_poll_cq.
Signed-off-by: NRajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Add support for user, dma and memory regions registration.
Signed-off-by: NRajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Add support for Queue Pair verbs which adds, deletes,
modifies and queries Queue Pairs.
Signed-off-by: NRajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Add support for protection domain and completion queue verbs.
Signed-off-by: NRajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Add support for ucontext, query port, add and del gid verbs.
Signed-off-by: NRajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Allocate and setup RoCE resources, interrupts and completion queues.
Adds device attributes.
Signed-off-by: NRajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Adds a skeletal implementation of the qed* RoCE driver -
basically the ability to communicate with the qede driver and
receive notifications from it regarding various init/exit events.
Signed-off-by: NRajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

The desired_perf is an abstract performance number. Its value should
be in the range of [lowest perf, highest perf] of CPPC.
The correct calculation is
  desired_perf = freq * cppc_highest_perf / cppc_dmi_max_khz

And cppc_cpufreq_set_target() returns if desired_perf is exactly
the same with the old perf.
Signed-off-by: NHoan Tran <hotran@apm.com>
Reviewed-by: NPrashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

The dev parameter passed to __axienet_device_reset() is not used inside
the function, so remove it.
Signed-off-by: NTobias Klauser <tklauser@distanz.ch>
Reviewed-by: NMichal Simek <michal.simek@xilinx.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is supposed to loop 1000 times and then give up.  The problem is
it's a post-op and after the loop we test if "loop" is zero when really
it would be -1.  Fix this by making it a pre-op.

Fixes: 1b7c55c4 ("liquidio: CN23XX queue manipulation")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The phy_start() is used to indicate the PHY is now ready to do its
work. The state is changed, normally to PHY_UP which means that both
the MAC and the PHY are ready.

If the phy driver is using polling, when the next poll happens, the
state machine notices the PHY is now in PHY_UP, and kicks off
auto-negotiation, if needed.

If however, the PHY is using interrupts, there is no polling. The phy
is stuck in PHY_UP until the next interrupt comes along. And there is
no reason for the PHY to interrupt.

Have phy_start() schedule the state machine to run, which both speeds
up the polling use case, and makes the interrupt use case actually
work.

This problems exists whenever there is a state change which will not
cause an interrupt. Trigger the state machine in these cases,
e.g. phy_error().
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Cc: Kyle Roeschley <kyle.roeschley@ni.com>
Tested-by: NKyle Roeschley <kyle.roeschley@ni.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Based upon v2 of Stephen's patch.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Wiht the latest rework of the xen-netback driver, we get a warning
on ARM about the types passed into min():

drivers/net/xen-netback/rx.c: In function 'xenvif_rx_next_chunk':
include/linux/kernel.h:739:16: error: comparison of distinct pointer types lacks a cast [-Werror]

The reason is that XEN_PAGE_SIZE is not size_t here. There
is no actual bug, and we can easily avoid the warning using the
min_t() macro instead of min().

Fixes: eb1723a2 ("xen-netback: refactor guest rx")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NPaul Durrant <paul.durrant@citrix.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch fixes a problem when propagated the
failure of ptp_clock_register to open function.
Signed-off-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre TORGUE <alexandre.torgue@st.com>
Cc: Rayagond Kokatanur <rayagond@vayavyalabs.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The gmac 4.x version has not extended descriptors
(that are available on 3.x instead of).
While initializing the PTP module, the advanced PTP was
enabled in case of extended descriptors. This cannot be
applied for 4.x version where only the hardware capability
register has to show if the feature is present.
Patch also adds some extra netdev_(debug/inof) to better
dump the configuration.
Signed-off-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre TORGUE <alexandre.torgue@st.com>
Cc: Rayagond Kokatanur <rayagond@vayavyalabs.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The definition of qed_get_rdma_ops() is not a prototype unless
we add 'void' here, as indicated by this W=1 warning:

drivers/net/ethernet/qlogic/qed/qed_roce.c: In function ‘qed_get_rdma_ops’:
drivers/net/ethernet/qlogic/qed/qed_roce.c:2950:28: error: old-style function definition [-Werror=old-style-definition]

Fixes: abd49676 ("qed: Add RoCE ll2 & GSI support")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NYuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The software calculation of UDP checksum in Netvsc driver was
only handling IPv4 case. By using skb_checksum_help() instead
all protocols can be handled. Rearrange code to eliminate goto
and look like other drivers.

This is a temporary solution; recent versions of Window Server etc
do support UDP checksum offload, just need to do the appropriate negotiation
with host to validate before using. This will be done in later patch.

Please queue this for -stable as well.
Signed-off-by: NStephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If a VIF has been ready for rx_stall_timeout (60s by default) and an
Rx ring is drained of all requests an Rx stall will be incorrectly
detected.  When this occurs and the guest Rx queue is empty, the Rx
ring's event index will not be set and the frontend will not raise an
event when new requests are placed on the ring, permanently stalling
the VIF.

This is a regression introduced by eb1723a2 (xen-netback:
refactor guest rx).

Fix this by reinstating the setting of queue->last_rx_time when
placing a packet onto the guest Rx ring.
Signed-off-by: NDavid Vrabel <david.vrabel@citrix.com>
Reviewed-by: NPaul Durrant <paul.durrant@citrix.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The reserved field precise_offset->rsv is not cleared before being
copied to user space, leaking kernel stack memory. Clear the struct
before it's copied.
Signed-off-by: NVlad Tsyrklevich <vlad@tsyrklevich.net>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

I am hitting this in mlx5:

drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c: In function
reclaim_pages_cmd.clone.0:
drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:346: error: call
to __compiletime_assert_346 declared with attribute error:
BUILD_BUG_ON failed: __mlx5_bit_off(manage_pages_out, pas[i]) % 64
drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c: In function give_pages:
drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:291: error: call
to __compiletime_assert_291 declared with attribute error:
BUILD_BUG_ON failed: __mlx5_bit_off(manage_pages_in, pas[i]) % 64

Problem is that this is doing a BUILD_BUG_ON on a non-constant
expression because of trying to take offset of pas[i] in the
structure.

Fix is to create MLX5_ARRAY_SET64 that takes an additional argument
that is the field index to separate between BUILD_BUG_ON on the array
constant field and the indexed field to assign the value to.
There are two callers of MLX5_SET64 that are trying to get a variable
offset, change those to call MLX5_ARRAY_SET64 passing 'pas' and 'i'
as the arguments to use in the offset check and the indexed value
assignment.

Fixes: a533ed5e ("net/mlx5: Pages management commands via mlx5 ifc")
Signed-off-by: NTom Herbert <tom@herbertland.com>
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The Quectel EC21 and EC25 need the same "set DTR" request as devices
based on the MDM9230 chipset, but has no USB3 support. Our best guess
is that the "set DTR" functionality depends on chipset and/or
baseband firmware generation. But USB3 is still an optional feature.

Since we cannot enable this unconditionally for all older devices, and
there doesn't appear to be anything we can use in the USB descriptors
to identify these chips, we are forced to use a device specific quirk
flag.
Reported-and-tested-by: NSebastian Sjoholm <sebastian.sjoholm@gmail.com>
Signed-off-by: NBjørn Mork <bjorn@mork.no>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Since we will remove items off the list using list_del() we need
to use a safe version of the list_for_each_entry() macro aptly named
list_for_each_entry_safe().
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Acked-by: NYuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

While build testing with randconfig on x86, I ran into this warning
that appears to have been around forever

drivers/net/ethernet/ti/tlan.c: In function ‘tlan_probe1’:
drivers/net/ethernet/ti/tlan.c:614:1: error: label ‘err_out’ defined but not used [-Werror=unused-label]

This can be trivially avoided by just moving the label into the
existing #ifdef.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

It is useful to be able to see the hash configuration when running tests.
This patch adds a debugfs node for that purpose.

The original version of this patch (commit c0c64c15) was reverted due
to build failures caused by a conflict with commit 0364a882
("xen-netback: switch to threaded irq for control ring"). This new version
of the patch is nearly identical to the original, the only difference
being that creation of the debugfs node is predicated on 'ctrl_irq' being
non-zero rather then the now non-existent 'ctrl_task'.
Signed-off-by: NPaul Durrant <paul.durrant@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: NWei Liu <wei.liu2@citrix.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit d352cf47 (cpufreq: conservative: Do not use transition
notifications) overlooked the case when the "frequency step" used
by the conservative governor is small relative to the distances
between the available frequencies and broke the algorithm by
using policy->cur instead of the previously requested frequency
when computing the next one.

As a result, the governor may not be able to go outside of a narrow
range between two consecutive available frequencies.

Fix the problem by making the governor save the previously requested
frequency and select the next one relative that value (unless it is
out of range, in which case policy->cur will be used instead).

Fixes: d352cf47 (cpufreq: conservative: Do not use transition notifications)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=177171Reported-and-tested-by: NAleksey Rybalkin <aleksey@rybalkin.org>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Cc: 4.8+ <stable@vger.kernel.org> # 4.8+
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

acpi_os_vprintf currently always uses a KERN_CONT prefix which may be
followed immediately by a proper KERN_<LEVEL>.  Check if the buffer
already has a KERN_<LEVEL> at the start of the buffer and avoid the
unnecessary KERN_CONT.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

When running as Xen dom0 a special processor_aggregator driver is
needed.  Don't register the standard driver in this case.

Without that check an error message:

"Error: Driver 'processor_aggregator' is already registered,
aborting..."

will be displayed.
Signed-off-by: NJuergen Gross <jgross@suse.com>
[ rjw: Minor fixups ]
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

It looks like the name of struct pstate_adjust_policy was updated
without updating its kerneldoc comment accordingly, so fix that
mistake.
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

The PID algorithm used by the intel_pstate driver tends to drive
performance to the minimum for workloads with utilization below the
setpoint, which is undesirable, so replace it with a modified
"proportional" algorithm on Atom.

The new algorithm will set the new P-state to be 1.25 times the
available maximum times the (frequency-invariant) utilization during
the previous sampling period except when the target P-state computed
this way is lower than the average P-state during the previous
sampling period.  In the latter case, it will increase the target by
50% of the difference between it and the average P-state to prevent
performance from dropping down too fast in some cases.
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

Body of an "if" statement wasn't indented.  Add a tab.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>

There might be designs where the power supply circuit is designed
in a way that VDETOFF and SWOFF is required to be set. Otherwise the
RTC detects a power loss. Add a device tree interface for this.
Signed-off-by: NCarsten Resch <Carsten.Resch@de.bosch.com>
Signed-off-by: NDirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: NOleksij Rempel <fixed-term.Oleksij.Rempel@de.bosch.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>