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While the other fq-based qdiscs take advantage of skb->hash and doesn't
recompute it if it is already set, sch_cake does not.
This was a deliberate choice because sch_cake hashes various parts of the
packet header to support its advanced flow isolation modes. However,
foregoing the use of skb->hash entirely loses a few important benefits:
- When skb->hash is set by hardware, a few CPU cycles can be saved by not
hashing again in software.
- Tunnel encapsulations will generally preserve the value of skb->hash from
before the encapsulation, which allows flow-based qdiscs to distinguish
between flows even though the outer packet header no longer has flow
information.
It turns out that we can preserve these desirable properties in many cases,
while still supporting the advanced flow isolation properties of sch_cake.
This patch does so by reusing the skb->hash value as the flow_hash part of
the hashing procedure in cake_hash() only in the following conditions:
- If the skb->hash is marked as covering the flow headers (skb->l4_hash is
set)
AND
- NAT header rewriting is either disabled, or did not change any values
used for hashing. The latter is important to match local-origin packets
such as those of a tunnel endpoint.
The immediate motivation for fixing this was the recent patch to WireGuard
to preserve the skb->hash on encapsulation. As such, this is also what I
tested against; with this patch, added latency under load for competing
flows drops from ~8 ms to sub-1ms on an RRUL test over a WireGuard tunnel
going through a virtual link shaped to 1Gbps using sch_cake. This matches
the results we saw with a similar setup using sch_fq_codel when testing the
WireGuard patch.
Fixes: 046f6fd5daef ("sched: Add Common Applications Kept Enhanced (cake) qdisc")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Until recently, the Micrel KSZ9031 PHY driver ignored any PHY mode
("RGMII-*ID") settings, but used the hardware defaults, augmented by
explicit configuration of individual skew values using the "*-skew-ps"
DT properties. The lack of PHY mode support was compensated by the
EtherAVB MAC driver, which configures TX and/or RX internal delay
itself, based on the PHY mode.
However, now the KSZ9031 driver has gained PHY mode support, delays may
be configured twice, causing regressions. E.g. on the Renesas
Salvator-X board with R-Car M3-W ES1.0, TX performance dropped from ca.
400 Mbps to 0.1-0.3 Mbps, as measured by nuttcp.
As internal delay configuration supported by the KSZ9031 PHY is too
limited for some use cases, the ability to configure MAC internal delay
is deemed useful and necessary. Hence a proper fix would involve
splitting internal delay configuration in two parts, one for the PHY,
and one for the MAC. However, this would require adding new DT
properties, thus breaking DTB backwards-compatibility.
Hence fix the regression in a backwards-compatibility way, by letting
the EtherAVB driver mask the PHY mode when it has inserted a delay, to
avoid the PHY driver adding a second delay. This also fixes messages
like:
Micrel KSZ9031 Gigabit PHY e6800000.ethernet-ffffffff:00: *-skew-ps values should be used only with phy-mode = "rgmii"
as the PHY no longer sees the original RGMII-*ID mode.
Solving the issue by splitting configuration in two parts can be handled
in future patches, and would require retaining a backwards-compatibility
mode anyway.
Fixes: bcf3440c6dd78bfe ("net: phy: micrel: add phy-mode support for the KSZ9031 PHY")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Petr Machata says:
====================
selftests: forwarding: Two small changes
Two unrelated changes in this patchset:
- In patch #1, convert mirror tests from using ping directly to generating
ICMP packets by mausezahn. Using ping in tests is error-prone, because
ping is too smart. On a flaky system (notably in a simulator), when
packets don't come quickly enough, more pings are sent, and that throws
off counters. This was worked around in the past by just pinging more
slowly, but using mausezahn avoids the issue as well without making the
tests unnecessary slow.
- A missing stats_update callback was recently added to act_pedit. Now that
iproute2 supports JSON dumping for pedit, extend in patch #2 the
pedit_dsfield selftest with a check that would have caught the fact that
the callback was missing.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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A missing stats_update callback was recently added to act_pedit. Now that
iproute2 supports JSON dumping for pedit, extend the pedit_dsfield selftest
with a check that would have caught the fact that the callback was missing.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Using ping in tests is error-prone, because ping is too smart. On a
flaky system (notably in a simulator), when packets don't come quickly
enough, more pings are sent, and that throws off counters. Instead use
mausezahn to generate ICMP echo request packets. That allows us to
send them in quicker succession as well, because the reason the ping
was made slow in the first place was to make the tests work on
simulated systems.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Roopa Prabhu says:
====================
vxlan fdb nexthop misc fixes
Roopa Prabhu (2):
vxlan: add check to prevent use of remote ip attributes with NDA_NH_ID
vxlan: few locking fixes in nexthop event handler
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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- remove fdb from nh_list before the rcu grace period
- protect fdb->vdev with rcu
- hold spin lock before destroying fdb
Fixes: c7cdbe2efc40 ("vxlan: support for nexthop notifiers")
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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NDA_NH_ID represents a remote ip or a group of remote ips.
It allows use of nexthop groups in lieu of a remote ip or a
list of remote ips supported by the fdb api.
Current code ignores the other remote ip attrs when NDA_NH_ID is
specified. In the spirit of strict checking, This commit adds a
check to explicitly return an error on incorrect usage.
Fixes: 1274e1cc4226 ("vxlan: ecmp support for mac fdb entries")
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue
Jeff Kirsher says:
====================
100GbE Intel Wired LAN Driver Updates 2020-05-28
This series contains updates to the ice driver only.
Anirudh (Ani) adds a poll for reset completion before proceeding with
driver initialization when the DDP package fails to load and the firmware
issues a core reset.
Jake cleans up unnecessary code, since ice_set_dflt_vsi_ctx() performs a
memset to clear the info from the context structures. Fixed a potential
double free during probe unrolling after a failure. Also fixed a
potential NULL pointer dereference upon register_netdev() failure.
Tony makes two functions static which are not called outside of their
file.
Brett refactors the ice_ena_vf_mappings(), which was doing the VF's MSIx
and queue mapping in one function which was hard to digest. So create a
new function to handle the enabling MSIx mappings and another function
to handle the enabling of queue mappings. Simplify the code flow in
ice_sriov_configure(). Created a helper function for clearing
VPGEN_VFRTRIG register, as this needs to be done on reset to notify the
VF that we are done resetting it. Fixed the initialization/creation and
reset flows, which was unnecessarily complicated, so separate the two
flows into their own functions. Renamed VF initialization functions to
make it more clear what they do and why. Added functionality to set the
VF trust mode bit on reset. Added helper functions to rebuild the VLAN
and MAC configurations when resetting a VF. Refactored how the VF reset
is handled to prevent VF reset timeouts.
Paul cleaned up code not needed during a CORER/GLOBR reset.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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A null pointer dereference in qrtr_ns_data_ready() is seen if a client
opens a qrtr socket before qrtr_ns_init() can bind to the control port.
When the control port is bound, the ENETRESET error will be broadcasted
and clients will close their sockets. This results in DEL_CLIENT
packets being sent to the ns and qrtr_ns_data_ready() being called
without the workqueue being allocated.
Allocate the workqueue before setting sk_data_ready and binding to the
control port. This ensures that the work and workqueue structs are
allocated and initialized before qrtr_ns_data_ready can be called.
Fixes: 0c2204a4ad71 ("net: qrtr: Migrate nameservice to kernel from userspace")
Signed-off-by: Chris Lew <clew@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Paolo Abeni says:
====================
mptcp: a bunch of fixes
This patch series pulls together a few bugfixes for MPTCP bug observed while
doing stress-test with apache bench - forced to use MPTCP and multiple
subflows.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently we remote the msk from the token container only
via mptcp_close(). The MPTCP master socket can be destroyed
also via other paths (e.g. if not yet accepted, when shutting
down the listener socket). When we hit the latter scenario,
dangling msk references are left into the token container,
leading to memory corruption and/or UaF.
This change addresses the issue by moving the token removal
into the msk destructor.
Fixes: 79c0949e9a09 ("mptcp: Add key generation and token tree")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If a MP_JOIN subflow completes the 3whs while another
CPU is closing the master msk, we can hit the
following race:
CPU1 CPU2
close()
mptcp_close
subflow_syn_recv_sock
mptcp_token_get_sock
mptcp_finish_join
inet_sk_state_load
mptcp_token_destroy
inet_sk_state_store(TCP_CLOSE)
__mptcp_flush_join_list()
mptcp_sock_graft
list_add_tail
sk_common_release
sock_orphan()
<socket free>
The MP_JOIN socket will be leaked. Additionally we can hit
UaF for the msk 'struct socket' referenced via the 'conn'
field.
This change try to address the issue introducing some
synchronization between the MP_JOIN 3whs and mptcp_close
via the join_list spinlock. If we detect the msk is closing
the MP_JOIN socket is closed, too.
Fixes: f296234c98a8 ("mptcp: Add handling of incoming MP_JOIN requests")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently unblocking connect() on MPTCP sockets fails frequently.
If mptcp_stream_connect() is invoked to complete a previously
attempted unblocking connection, it will still try to create
the first subflow via __mptcp_socket_create(). If the 3whs is
completed and the 'can_ack' flag is already set, the latter
will fail with -EINVAL.
This change addresses the issue checking for pending connect and
delegating the completion to the first subflow. Additionally
do msk addresses and sk_state changes only when needed.
Fixes: 2303f994b3e1 ("mptcp: Associate MPTCP context with TCP socket")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Heiner Kallweit says:
====================
r8169: again few improvements
Again a series with few r8169 improvements.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Simplify handling the power management callbacks.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Functionality for quiescing the chip is spread across different
functions currently. Move it to rtl8169_down().
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Move calls that are needed before and after calling rtl8169_hw_reset()
into this function. This requires to move the function in the code.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In places where the indexes have to be reset, we call
rtl8169_init_ring_indexes() anyway after rtl8169_tx_clear().
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We go to runtime-suspend few secs after cable removal. As cable is
removed "physical link up" is the only meaningful WoL source.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Change driver private data type to struct rtl8169_private * to avoid
some overhead.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Despite of how spi_nor_parse_bfpt() abuses the structure fields during
their calculation, gcc manages to make some decent code out of that. :-)
Yet adding a local variable to store the BFPT DWORDs during calculations
still saves 12 bytes of the object code (AArch64 gcc 4.8.5)...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
Kalle Valo says:
====================
wireless-drivers-next patches for v5.8
Third set of patches for v5.8. Final new features before the merge
window (most likely) opens, noteworthy here is adding WPA3 support to
old drivers rt2800, b43 and b43_legacy.
Major changes:
ath10k
* SDIO and SNOC busses are not experimental anymore
ath9k
* allow receive of broadcast Action frames
ath9k_htc
* allow receive of broadcast Action frames
rt2800
* enable WPA3 support out of box
b43
* enable WPA3 support
b43_legacy
* enable WPA3 support
mwifiex
* advertise max number of clients to user space
mt76
* mt7663: add remain-on-channel support
* mt7915: add spatial reuse support
* add support for mt7611n hardware
iwlwifi
* add ACPI DSM support
* support enabling 5.2GHz bands in Indonesia via ACPI
* bump FW API version to 56
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pre-fetch send buffer for the CDC validation message before entering the
send_lock. Without that the send call might fail with -EBUSY because
there are no free buffers and waiting for buffers is not possible under
send_lock.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Vladimir Oltean says:
====================
Fix 2 non-critical issues in SJA1105 DSA
This small series suppresses the W=1 warnings in the sja1105 driver and
it corrects some register offsets. I would like to target it against
net-next since it would have non-trivial conflicts with net, and the
problems it solves are not that big of a deal.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The dynamic configuration interface for the General Params and the L2
Lookup Params tables was copy-pasted between E/T devices and P/Q/R/S
devices. Nonetheless, these interfaces are bitwise different.
The driver is using dynamic reconfiguration of the General Parameters
table for the port mirroring feature, which was therefore broken on
P/Q/R/S.
Note that this patch can't be backported easily very far to stable trees
(since it conflicts with some other development done since the
introduction of the driver). So the Fixes: tag is purely informational.
Fixes: 8aa9ebccae87 ("net: dsa: Introduce driver for NXP SJA1105 5-port L2 switch")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Newer compilers complain with W=1 builds that there are non-static
functions defined in sja1105_static_config.c that don't have a
prototype, because their prototype is defined in sja1105.h which this
translation unit does not include.
I don't entirely understand what is the point of these warnings, since
in principle there's nothing wrong with that. But let's move the
prototypes to a header file that _is_ included by
sja1105_static_config.c, since that will make these warnings go away.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently add nat mangle action with comparing invert and orig tuple.
It is better to check IPS_NAT_MASK flags first to avoid non necessary
memcmp for non-NAT conntrack.
Signed-off-by: wenxu <wenxu@ucloud.cn>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
Saeed Mahameed says:
====================
mlx5-cleanup-2020-05-29
Accumulated cleanup patches and sparse warning fixes for mlx5 driver.
1) sync with mlx5-next branch
2) Eli Cohen declares mpls_entry_encode() helper in mpls.h as suggested
by Jakub Kicinski and David Ahern, and use it in mlx5
3) Jesper Fixes xdp data_meta setup in mlx5
4) Many sparse and build warnings cleanup
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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When devinet_sysctl_register() failed, the memory allocated
in neigh_parms_alloc() should be freed.
Fixes: 20e61da7ffcf ("ipv4: fail early when creating netdev named all or default")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When client on the host tries to connect(SOCK_STREAM, O_NONBLOCK) to the
server on the guest, there will be a panic on a ThunderX2 (armv8a server):
[ 463.718844] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[ 463.718848] Mem abort info:
[ 463.718849] ESR = 0x96000044
[ 463.718852] EC = 0x25: DABT (current EL), IL = 32 bits
[ 463.718853] SET = 0, FnV = 0
[ 463.718854] EA = 0, S1PTW = 0
[ 463.718855] Data abort info:
[ 463.718856] ISV = 0, ISS = 0x00000044
[ 463.718857] CM = 0, WnR = 1
[ 463.718859] user pgtable: 4k pages, 48-bit VAs, pgdp=0000008f6f6e9000
[ 463.718861] [0000000000000000] pgd=0000000000000000
[ 463.718866] Internal error: Oops: 96000044 [#1] SMP
[...]
[ 463.718977] CPU: 213 PID: 5040 Comm: vhost-5032 Tainted: G O 5.7.0-rc7+ #139
[ 463.718980] Hardware name: GIGABYTE R281-T91-00/MT91-FS1-00, BIOS F06 09/25/2018
[ 463.718982] pstate: 60400009 (nZCv daif +PAN -UAO)
[ 463.718995] pc : virtio_transport_recv_pkt+0x4c8/0xd40 [vmw_vsock_virtio_transport_common]
[ 463.718999] lr : virtio_transport_recv_pkt+0x1fc/0xd40 [vmw_vsock_virtio_transport_common]
[ 463.719000] sp : ffff80002dbe3c40
[...]
[ 463.719025] Call trace:
[ 463.719030] virtio_transport_recv_pkt+0x4c8/0xd40 [vmw_vsock_virtio_transport_common]
[ 463.719034] vhost_vsock_handle_tx_kick+0x360/0x408 [vhost_vsock]
[ 463.719041] vhost_worker+0x100/0x1a0 [vhost]
[ 463.719048] kthread+0x128/0x130
[ 463.719052] ret_from_fork+0x10/0x18
The race condition is as follows:
Task1 Task2
===== =====
__sock_release virtio_transport_recv_pkt
__vsock_release vsock_find_bound_socket (found sk)
lock_sock_nested
vsock_remove_sock
sock_orphan
sk_set_socket(sk, NULL)
sk->sk_shutdown = SHUTDOWN_MASK
...
release_sock
lock_sock
virtio_transport_recv_connecting
sk->sk_socket->state (panic!)
The root cause is that vsock_find_bound_socket can't hold the lock_sock,
so there is a small race window between vsock_find_bound_socket() and
lock_sock(). If __vsock_release() is running in another task,
sk->sk_socket will be set to NULL inadvertently.
This fixes it by checking sk->sk_shutdown(suggested by Stefano) after
lock_sock since sk->sk_shutdown is set to SHUTDOWN_MASK under the
protection of lock_sock_nested.
Signed-off-by: Jia He <justin.he@arm.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Huazhong Tan says:
====================
net: hns3: adds some cleanups for -next
There are some cleanups for the HNS3 ethernet driver, fix an
incorrect print format, an incorrect comment and some coding
style issues, also remove some unused codes and macros.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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NETIF_F_HW_VLAN_CTAG_FILTER is not set in netdev->hw_feature for
the HNS3 driver, so the handler of NETIF_F_HW_VLAN_CTAG_FILTER
in hns3_nic_set_features() won't be called, remove it.
Reported-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Remove a redundant blank line in hclgevf_cmd_set_promisc_mode(),
and fix a reverse xmas tree coding style issue in
hclgevf_set_rss_tc_mode().
Reported-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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struct hclgevf_dev stands for VF device, its field num_tqps
indicates the number of VF's task queue pairs, so the comment
is incorrect, replace 'PF' with 'VF'.
Reported-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Macro hclgevf_ring_to_dma_dir and hclgevf_is_csq defined in
hclgevf_cmd.c, but not used, so remove them.
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Macro hclge_is_csq defined in hcgle_cmd.c has not been used,
so remove it.
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Use %d to print int variable 'ret' in hclge_mac_mdio_config().
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add MAINTAINERS entry for Qualcomm IPCC driver and its binding.
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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Add support for the Inter-Processor Communication Controller (IPCC)
block from Qualcomm that coordinates the interrupts (inbound & outbound)
for Multiprocessor (MPROC), COMPUTE-Level0 (COMPUTE-L0) & COMPUTE-Level1
(COMPUTE-L1) protocols for the Application Processor Subsystem (APSS).
This driver is modeled as an irqchip+mailbox driver. The irqchip part
helps in receiving the interrupts from the IPCC clients such as modems,
DSPs, PCI-E etc... and forwards them to respective entities in APSS.
On the other hand, the mailbox part is used to send interrupts to the IPCC
clients from the entities of APSS.
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>
Signed-off-by: Venkata Narendra Kumar Gutta <vnkgutta@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
[mani: moved to mailbox, added static mbox channels and cleanups]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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Add devicetree YAML binding for Qualcomm Inter-Processor Communication
Controller (IPCC) block.
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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In case of error, the function devm_ioremap() returns NULL pointer not
ERR_PTR(). So we should check whether the return value of devm_ioremap()
is NULL instead of IS_ERR.
Fixes: 4981b82ba2ff ("mailbox: ZynqMP IPI mailbox controller")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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The i.MX8 SCU message header size is the number of "u32" elements,
not "u8", so fix the check.
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1461658 ("Memory - corruptions")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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The Spreadtrum mailbox controller supports 8 channels to communicate
with MCUs, and it contains 2 different parts: inbox and outbox, which
are used to send and receive messages by IRQ mode.
Signed-off-by: Baolin Wang <baolin.wang@unisoc.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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Add the Spreadtrum mailbox documentation.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Baolin Wang <baolin.wang@unisoc.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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The function platform_get_irq can log an error already.
Thus omit a redundant message for the exception handling in the
calling function.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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devm_mbox_controller_register() may fail, and in the case of failure the
priv->clk clock that was previously enabled, should be disabled.
Fixes: 2bb7005696e2 ("mailbox: Add support for i.MX messaging unit")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
[Jassi: fixed merge/am conflict]
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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It is useful to know if we are the only master on a given bus. Because
this is a HW description of the bus, add it to the generic bindings.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
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This called from mbox_request_channel(). The caller is expecting error
pointers and not NULL so this "return NULL;" will lead to an Oops.
Fixes: 0a67003b1985 ("mailbox: imx: add SCU MU support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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Some power hungry sub-systems like VPU has its own MUs which also
use mailbox driver, current mailbox driver uses platform driver
model and MU's power will be ON after driver probed and left ON
there, it may cause the whole sub-system can NOT enter lower power
mode, take VPU driver for example, it has runtime PM support, but
due to its MU always ON, the VPU sub-system will be always ON and
consume many power during kernel idle.
To save power in kernel idle, mailbox driver needs to support
runtime PM in order to power off MU when it is unused. However,
the runtime suspend/resume can ONLY be implemented in mailbox's
.shutdown/.startup callback, so its consumer needs to call
mbox_request_channel()/mbox_free_channel() in consumer driver's
runtime PM callback, then the MU's power will be ON/OFF along with
consumer's runtime PM status.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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