Commit Graph

856955 Commits

Author SHA1 Message Date
Greg Kroah-Hartman
a62052ba2a wimax: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

This cleans up a lot of unneeded code and logic around the debugfs wimax
files, making all of this much simpler and easier to understand.

Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: linux-wimax@intel.com
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:47 -07:00
David S. Miller
38b9e0f6d9 mlx5-updates-2019-08-09
This series includes update to mlx5 ethernet and core driver:
 
 In first #11 patches, Vlad submits part 2 of 3 part series to allow
 TC flow handling for concurrent execution.
 
 1) TC flow handling for concurrent execution (part 2)
 
 Vald Says:
 ==========
 
 Refactor data structures that are shared between flows in tc.
 Currently, all cls API hardware offloads driver callbacks require caller
 to hold rtnl lock when calling them. Cls API has already been updated to
 update software filters in parallel (on classifiers that support
 unlocked execution), however hardware offloads code still obtains rtnl
 lock before calling driver tc callbacks. This set implements support for
 unlocked execution of tc hairpin, mod_hdr and encap subsystem. The
 changed implemented in these subsystems are very similar in general.
 
 The main difference is that hairpin is accessed through mlx5e_tc_table
 (legacy mode), mod_hdr is accessed through both mlx5e_tc_table and
 mlx5_esw_offload (legacy and switchdev modes) and encap is only accessed
 through mlx5_esw_offload (switchdev mode).
 
 1.1) Hairpin handling and structure mlx5e_hairpin_entry refactored in
 following way:
 
 - Hairpin structure is extended with atomic reference counter. This
   approach allows to lookup of hairpin entry and obtain reference to it
   with hairpin_tbl_lock protection and then continue using the entry
   unlocked (including provisioning to hardware).
 
 - To support unlocked provisioning of hairpin entry to hardware, the entry
   is extended with 'res_ready' completion and is inserted to hairpin_tbl
   before calling the firmware. With this approach any concurrent users that
   attempt to use the same hairpin entry wait for completion first to
   prevent access to entries that are not fully initialized.
 
 - Hairpin entry is extended with new flows_lock spinlock to protect the
   list when multiple concurrent tc instances update flows attached to
   the same hairpin entry.
 
 1.2) Modify header handling code and structure mlx5e_mod_hdr_entry
 are refactored in the following way:
 
 - Mod_hdr structure is extended with atomic reference counter. This
   approach allows to lookup of mod_hdr entry and obtain reference to it
   with mod_hdr_tbl_lock protection and then continue using the entry
   unlocked (including provisioning to hardware).
 
 - To support unlocked provisioning of mod_hdr entry to hardware, the entry
   is extended with 'res_ready' completion and is inserted to mod_hdr_tbl
   before calling the firmware. With this approach any concurrent users that
   attempt to use the same mod_hdr entry wait for completion first to
   prevent access to entries that are not fully initialized.
 
 - Mod_Hdr entry is extended with new flows_lock spinlock to protect the
   list when multiple concurrent tc instances update flows attached to
   the same mod_hdr entry.
 
 1.3) Encapsulation handling code and Structure mlx5e_encap_entry
 are refactored in the following way:
 
 - encap structure is extended with atomic reference counter. This
   approach allows to lookup of encap entry and obtain reference to it
   with encap_tbl_lock protection and then continue using the entry
   unlocked (including provisioning to hardware).
 
 - To support unlocked provisioning of encap entry to hardware, the entry is
   extended with 'res_ready' completion and is inserted to encap_tbl before
   calling the firmware. With this approach any concurrent users that
   attempt to use the same encap entry wait for completion first to prevent
   access to entries that are not fully initialized.
 
 - As a difference from approach used to refactor hairpin and mod_hdr,
   encap entry is not extended with any per-entry fine-grained lock.
   Instead, encap_table_lock is used to synchronize all operations on
   encap table and instances of mlx5e_encap_entry. This is necessary
   because single flow can be attached to multiple encap entries
   simultaneously. During new flow creation or neigh update event all of
   encaps that flow is attached to must be accessed together as in atomic
   manner, which makes usage of per-entry lock infeasible.
 
 - Encap entry is extended with new flows_lock spinlock to protect the
   list when multiple concurrent tc instances update flows attached to
   the same encap entry.
 
 ==========
 
 3) Parav improves the way port representors report their parent ID and
 port index.
 
 4) Use refcount_t for refcount in vxlan data base from  Chuhong Yuan
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Merge tag 'mlx5-updates-2019-08-09' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5-updates-2019-08-09

This series includes update to mlx5 ethernet and core driver:

In first #11 patches, Vlad submits part 2 of 3 part series to allow
TC flow handling for concurrent execution.

1) TC flow handling for concurrent execution (part 2)

Vald Says:
==========

Refactor data structures that are shared between flows in tc.
Currently, all cls API hardware offloads driver callbacks require caller
to hold rtnl lock when calling them. Cls API has already been updated to
update software filters in parallel (on classifiers that support
unlocked execution), however hardware offloads code still obtains rtnl
lock before calling driver tc callbacks. This set implements support for
unlocked execution of tc hairpin, mod_hdr and encap subsystem. The
changed implemented in these subsystems are very similar in general.

The main difference is that hairpin is accessed through mlx5e_tc_table
(legacy mode), mod_hdr is accessed through both mlx5e_tc_table and
mlx5_esw_offload (legacy and switchdev modes) and encap is only accessed
through mlx5_esw_offload (switchdev mode).

1.1) Hairpin handling and structure mlx5e_hairpin_entry refactored in
following way:

- Hairpin structure is extended with atomic reference counter. This
  approach allows to lookup of hairpin entry and obtain reference to it
  with hairpin_tbl_lock protection and then continue using the entry
  unlocked (including provisioning to hardware).

- To support unlocked provisioning of hairpin entry to hardware, the entry
  is extended with 'res_ready' completion and is inserted to hairpin_tbl
  before calling the firmware. With this approach any concurrent users that
  attempt to use the same hairpin entry wait for completion first to
  prevent access to entries that are not fully initialized.

- Hairpin entry is extended with new flows_lock spinlock to protect the
  list when multiple concurrent tc instances update flows attached to
  the same hairpin entry.

1.2) Modify header handling code and structure mlx5e_mod_hdr_entry
are refactored in the following way:

- Mod_hdr structure is extended with atomic reference counter. This
  approach allows to lookup of mod_hdr entry and obtain reference to it
  with mod_hdr_tbl_lock protection and then continue using the entry
  unlocked (including provisioning to hardware).

- To support unlocked provisioning of mod_hdr entry to hardware, the entry
  is extended with 'res_ready' completion and is inserted to mod_hdr_tbl
  before calling the firmware. With this approach any concurrent users that
  attempt to use the same mod_hdr entry wait for completion first to
  prevent access to entries that are not fully initialized.

- Mod_Hdr entry is extended with new flows_lock spinlock to protect the
  list when multiple concurrent tc instances update flows attached to
  the same mod_hdr entry.

1.3) Encapsulation handling code and Structure mlx5e_encap_entry
are refactored in the following way:

- encap structure is extended with atomic reference counter. This
  approach allows to lookup of encap entry and obtain reference to it
  with encap_tbl_lock protection and then continue using the entry
  unlocked (including provisioning to hardware).

- To support unlocked provisioning of encap entry to hardware, the entry is
  extended with 'res_ready' completion and is inserted to encap_tbl before
  calling the firmware. With this approach any concurrent users that
  attempt to use the same encap entry wait for completion first to prevent
  access to entries that are not fully initialized.

- As a difference from approach used to refactor hairpin and mod_hdr,
  encap entry is not extended with any per-entry fine-grained lock.
  Instead, encap_table_lock is used to synchronize all operations on
  encap table and instances of mlx5e_encap_entry. This is necessary
  because single flow can be attached to multiple encap entries
  simultaneously. During new flow creation or neigh update event all of
  encaps that flow is attached to must be accessed together as in atomic
  manner, which makes usage of per-entry lock infeasible.

- Encap entry is extended with new flows_lock spinlock to protect the
  list when multiple concurrent tc instances update flows attached to
  the same encap entry.

==========

3) Parav improves the way port representors report their parent ID and
port index.

4) Use refcount_t for refcount in vxlan data base from  Chuhong Yuan
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 20:11:19 -07:00
Roman Mashak
62ad42ec9c tc-testing: added tdc tests for matchall filter
Signed-off-by: Roman Mashak <mrv@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 19:59:13 -07:00
David Ahern
f887427b2c selftests: Fix detection of nettest command in fcnal-test
Most of the tests run by fcnal-test.sh relies on the nettest command.
Rather than trying to cover all of the individual tests, check for the
binary only at the beginning.

Also removes the need for log_error which is undefined.

Fixes: 6f9d5cacfe ("selftests: Setup for functional tests for fib and socket lookups")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 19:54:14 -07:00
Chuhong Yuan
b51c225e6c net/mlx5e: Use refcount_t for refcount
refcount_t is better for reference counters since its
implementation can prevent overflows.
So convert atomic_t ref counters to refcount_t.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:11 -07:00
Parav Pandit
c938451f6b net/mlx5e: Use vhca_id in generating representor port_index
It is desired to use unique port indices when multiple pci devices'
devlink instance have the same switch-id.

Make use of vhca-id to generate such unique devlink port indices.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:11 -07:00
Parav Pandit
724ee17912 net/mlx5e: Simplify querying port representor parent id
System image GUID doesn't depend on eswitch switchdev mode.

Hence, remove the check which simplifies the code.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Vu Pham <vuhuong@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:11 -07:00
Parav Pandit
ef2e4094e0 net/mlx5: E-switch, Removed unused hwid
Currently mlx5_eswitch_rep stores same hw ID for all representors.
However it is never used from this structure.
It is always used from mlx5_vport.

Hence, remove unused field.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Vu Pham <vuhuong@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:10 -07:00
Vlad Buslov
d589e785ba net/mlx5e: Allow concurrent creation of encap entries
Encap entries creation is fully synchronized by encap_tbl_lock. In order to
allow concurrent allocation of hardware resources used to offload
encapsulation, extend mlx5e_encap_entry with 'res_ready' completion. Move
call to mlx5e_tc_tun_create_header_ipv{4|6}() out of encap_tbl_lock
critical section. Modify code that attaches new flows to existing encap to
wait for 'res_ready' completion before using the entry. Insert encap entry
to table before provisioning it to hardware and modify all users of the
encap table to verify that encap was fully initialized by checking
completion result for non-zero value (and to wait for 'res_ready'
completion, if necessary).

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:10 -07:00
Vlad Buslov
61086f3910 net/mlx5e: Protect encap hash table with mutex
To remove dependency on rtnl lock, protect encap hash table from concurrent
modifications with new "encap_tbl_lock" mutex. Use the mutex to protect
internal encap entry state from concurrent modification. This is necessary
because a flow can be attached to multiple encap entries simultaneously,
which significantly complicates using finer grained per-entry lock.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:10 -07:00
Vlad Buslov
948993f2be net/mlx5e: Extend encap entry with reference counter
List of flows attached to encap entry is used as implicit reference
counter (encap entry is deallocated when list becomes free) and as a
mechanism to obtain encap entry that flow is attached to (through list
head). This is not safe when concurrent modification of list of flows
attached to encap entry is possible. Proper atomic reference counter is
required to support concurrent access.

As a preparation for extending encap with reference counting, extract code
that lookups and deletes encap entry into standalone put/get helpers. In
order to remove this dependency on external locking, extend encap entry
with reference counter to manage its lifetime and extend flow structure
with direct pointer to encap entry that flow is attached to.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:10 -07:00
Vlad Buslov
a734d00717 net/mlx5e: Allow concurrent creation of mod_hdr entries
Mod_hdr entries creation is fully synchronized by mod_hdr_tbl->lock. In
order to allow concurrent allocation of hardware resources used to offload
header rewrite, extend mlx5e_mod_hdr_entry with 'res_ready' completion.
Move call to mlx5_modify_header_alloc() out of mod_hdr_tbl->lock critical
section. Modify code that attaches new flows to existing mh to wait for
'res_ready' completion before using the entry. Insert mh to mod_hdr table
before provisioning it to hardware and modify all users of mod_hdr table to
verify that mh was fully initialized by checking completion result for
negative value (and to wait for 'res_ready' completion, if necessary).

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:10 -07:00
Vlad Buslov
d2faae25c3 net/mlx5e: Protect mod_hdr hash table with mutex
To remove dependency on rtnl lock, protect mod_hdr hash table from
concurrent modifications with new mutex.

Implement helper function to get flow namespace to prevent code
duplication.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:09 -07:00
Vlad Buslov
83a52f0d52 net/mlx5e: Protect mod header entry flows list with spinlock
To remove dependency on rtnl lock, extend mod header entry with spinlock
and use it to protect list of flows attached to mod header entry from
concurrent modifications.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:09 -07:00
Vlad Buslov
dd58edc328 net/mlx5e: Extend mod header entry with reference counter
List of flows attached to mod header entry is used as implicit reference
counter (mod header entry is deallocated when list becomes free) and as a
mechanism to obtain mod header entry that flow is attached to (through list
head). This is not safe when concurrent modification of list of flows
attached to mod header entry is possible. Proper atomic reference counter
is required to support concurrent access.

As a preparation for extending mod header with reference counting, extract
code that lookups and deletes mod header entry into standalone put/get
helpers. In order to remove this dependency on external locking, extend mod
header entry with reference counter to manage its lifetime and extend flow
structure with direct pointer to mod header entry that flow is attached to.

To remove code duplication between legacy and switchdev mode
implementations that both support mod_hdr functionality, store mod_hdr
table in dedicated structure used by both fdb and kernel namespaces. New
table structure is extended with table lock by one of the following patches
in this series. Implement helper function to get correct mod_hdr table
depending on flow namespace.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:09 -07:00
Vlad Buslov
db76ca2424 net/mlx5e: Allow concurrent creation of hairpin entries
Hairpin entries creation is fully synchronized by hairpin_tbl_lock. In
order to allow concurrent initialization of mlx5e_hairpin structure
instances and provisioning of hairpin entries to hardware, extend
mlx5e_hairpin_entry with 'res_ready' completion. Move call to
mlx5e_hairpin_create() out of hairpin_tbl_lock critical section. Modify
code that attaches new flows to existing hpe to wait for 'res_ready'
completion before using the hpe. Insert hpe to hairpin table before
provisioning it to hardware and modify all users of hairpin table to verify
that hpe was fully initialized by checking hpe->hp pointer (and to wait for
'res_ready' completion, if necessary).

Modify dead peer update event handling function to save hpe's to temporary
list with their reference counter incremented. Wait for completion of hpe's
in temporary list and update their 'peer_gone' flag outside of
hairpin_tbl_lock critical section.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:09 -07:00
Vlad Buslov
b32accda8a net/mlx5e: Protect hairpin hash table with mutex
To remove dependency on rtnl lock, protect hairpin hash table from
concurrent modifications with new "hairpin_tbl_lock" mutex.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:08 -07:00
Vlad Buslov
73edca736e net/mlx5e: Protect hairpin entry flows list with spinlock
To remove dependency on rtnl lock, extend hairpin entry with spinlock and
use it to protect list of flows attached to hairpin entry from concurrent
modifications.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:08 -07:00
Vlad Buslov
e4f9abbd38 net/mlx5e: Extend hairpin entry with reference counter
List of flows attached to hairpin entry is used as implicit reference
counter (hairpin entry is deallocated when list becomes free) and as a
mechanism to obtain hairpin entry that flow is attached to (through list
head). This is not safe when concurrent modification of list of flows
attached to hairpin entry is possible. Proper atomic reference counter is
required to support concurrent access.

As a preparation for extending hairpin with reference counting, extract
code that deletes hairpin entry into standalone function. In order to
remove this dependency on external locking, extend hairpin entry with
reference counter to manage its lifetime and extend flow structure with
direct pointer to hairpin entry that flow is attached to.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2019-08-09 14:54:08 -07:00
David S. Miller
f52ea3c55a Merge branch 'hns3-next'
Huazhong Tan says:

====================
net: hns3: add some bugfixes & optimizations & cleanups for HNS3 driver

This patch-set includes code optimizations, bugfixes and cleanups for
the HNS3 ethernet controller driver.

[patch 01/12] fixes a GFP flag error.

[patch 02/12] fixes a VF interrupt error.

[patch 03/12] adds a cleanup for VLAN handling.

[patch 04/12] fixes a bug in debugfs.

[patch 05/12] modifies pause displaying format.

[patch 06/12] adds more DFX information for ethtool -d.

[patch 07/12] adds more TX statistics information.

[patch 08/12] adds a check for TX BD number.

[patch 09/12] adds a cleanup for dumping NCL_CONFIG.

[patch 10/12] refines function for querying MAC pause statistics.

[patch 11/12] adds a handshake with VF when doing PF reset.

[patch 12/12] refines some macro definitions.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:33 -07:00
Guojia Liao
eddd98600b net: hns3: refine some macro definitions
Macro arguments should be enclosed in parentheses, in case of
expression argument, but parentheses of pure number in macro
definition should be removed for simplicity.

Signed-off-by: Guojia Liao <liaoguojia@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:33 -07:00
Huazhong Tan
427a7bff66 net: hns3: add handshake with VF for PF reset
Before PF asserting function reset, it should make sure
that all its VFs have been ready, otherwise, it will cause
some hardware errors.

So this patch adds function hclge_func_reset_sync_vf() to
synchronize VF before asserting PF function reset. For new
firmware which supports command HCLGE_OPC_QUERY_VF_RST_RDY,
we will try to query VFs' ready status within 30 seconds.
And keep the old implementation for compatible with firmware
which does not support this command.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:33 -07:00
Yufeng Mo
615466ce41 net: hns3: refine MAC pause statistics querying function
This patch refines the interface for querying MAC pause
statistics, and adds structure hns3_mac_stats to keep the
count of TX & RX.

Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:33 -07:00
Yufeng Mo
dec8466001 net: hns3: add function display NCL_CONFIG info
This adds a new function hclge_ncl_config_data_print()
to print the data of NCL_CONFIG, to make the code more
readable. Also, using macro replaces some magic number.

Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:33 -07:00
Yunsheng Lin
42611b70f8 net: hns3: add check for max TX BD num for tso and non-tso case
Hardware supports up to 8 TX BD for non-TSO skb and 63 TX
BD for TSO skb. Currently hns3 driver does not check the max
BD num that required by a skb before filling desc, which may
cause the hardware to issue a RAS error throug PCIe AER.

This patch adds the max BD num check before filling desc,
if the bd num is not within the hardware limit, it will
record the error by ring->stats.sw_err_cnt counter and
free the skb.

This patch also cleans up the hns3_nic_bd_num function by
changing the return type and removing an unnecessary check.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:33 -07:00
Yunsheng Lin
b20d7fe51e net: hns3: add some statitics info to tx process
This patch adds tx_vlan_err, tx_l4_proto_err, tx_l2l3l4_err
and tx_tso_err counter to tx process, in order to better
debug the desc filling error.

This patch also adds a missing u64_stats_update_* around
ring->stats.sw_err_cnt and adds hns3_rl_err to limit the
error printing in the IO patch.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:33 -07:00
Guangbin Huang
ddb54554fa net: hns3: add DFX registers information for ethtool -d
Now we can use ethtool -d command to dump some registers. However,
these registers information is not enough to find out where the problem is.

This patch adds DFX registers information after original registers
when use ethtool -d commmand to dump registers. Also, using macro
replaces some related magic number.

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:32 -07:00
Yonglong Liu
aacbe27e82 net: hns3: modify how pause options is displayed
Currently, the pause options of HNS3 shown like this:
"RX/TX" is always the same with "RX negotiated/TX negotiated".
Because of the driver covered the value of "RX/TX" with the value
of "RX negotiated/TX negotiated" after adjust link.

This patch records the pause configurations of the user, and never
covered them in adjust link.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:32 -07:00
Yufeng Mo
7ac243f99d net: hns3: add input length check for debugfs write function
If the input length reaches the maximum value of size_t, the reverse is
triggered when 1 is added. In addition, there is no need to have such a
large length. Therefore, the input length should be checked and the value
should be less than or equal to 1024.

Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:32 -07:00
Yunsheng Lin
eb977d996e net: hns3: clean up for vlan handling in hns3_fill_desc_vtags
This patch refactors the hns3_fill_desc_vtags function
by avoiding passing too many parameters, reducing indent
level and some other clean up.

This patch also adds the hns3_fill_skb_desc function to
fill the first desc of a skb.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:32 -07:00
Huazhong Tan
130509213b net: hns3: fix interrupt clearing error for VF
Currently, VF driver has two kinds of interrupts, reset & CMDQ RX.
For revision 0x21, according to the UM, each interrupt should be
cleared by write 0 to the corresponding bit, but the implementation
writes 0 to the whole register in fact, it will clear other
interrupt at the same time, then the VF will loss the interrupt.
But for revision 0x20, this interrupt clear register is a read &
write register, for compatible, we just keep the old implementation
for 0x20.

This patch fixes it, also, adds a new register for reading the interrupt
status according to hardware user manual.

Fixes: e2cb1dec97 ("net: hns3: Add HNS3 VF HCL(Hardware Compatibility Layer) Support")
Fixes: b90fcc5bd9 ("net: hns3: add reset handling for VF when doing Core/Global/IMP reset")

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:32 -07:00
Zhongzhu Liu
9e6717af61 net: hns3: fix GFP flag error in hclge_mac_update_stats()
When CONFIG_DEBUG_ATOMIC_SLEEP on, calling kzalloc with
GFP_KERNEL in hclge_mac_update_stats() will get below warning:

[   52.514677] BUG: sleeping function called from invalid context at mm/slab.h:501
[   52.522051] in_atomic(): 0, irqs_disabled(): 0, pid: 1015, name: ifconfig
[   52.528827] 2 locks held by ifconfig/1015:
[   52.532921]  #0: (____ptrval____) (&p->lock){....}, at: seq_read+0x54/0x748
[   52.539878]  #1: (____ptrval____) (rcu_read_lock){....}, at: dev_seq_start+0x0/0x140
[   52.547610] CPU: 16 PID: 1015 Comm: ifconfig Not tainted 5.3.0-rc3-00697-g20b80be #98
[   52.555408] Hardware name: Huawei TaiShan 2280 V2/BC82AMDC, BIOS 2280-V2 CS V3.B050.01 08/08/2019
[   52.564242] Call trace:
[   52.566687]  dump_backtrace+0x0/0x1f8
[   52.570338]  show_stack+0x14/0x20
[   52.573646]  dump_stack+0xb4/0xec
[   52.576950]  ___might_sleep+0x178/0x198
[   52.580773]  __might_sleep+0x74/0xe0
[   52.584338]  __kmalloc+0x244/0x2d8
[   52.587744]  hclge_mac_update_stats+0xc8/0x1f8 [hclge]
[   52.592870]  hclge_update_stats+0xe0/0x170 [hclge]
[   52.597651]  hns3_nic_get_stats64+0xa0/0x458 [hns3]
[   52.602514]  dev_get_stats+0x58/0x138
[   52.606165]  dev_seq_printf_stats+0x8c/0x280
[   52.610420]  dev_seq_show+0x14/0x40
[   52.613898]  seq_read+0x574/0x748
[   52.617205]  proc_reg_read+0xb4/0x108
[   52.620857]  __vfs_read+0x54/0xa8
[   52.624162]  vfs_read+0xa0/0x190
[   52.627380]  ksys_read+0xc8/0x178
[   52.630685]  __arm64_sys_read+0x40/0x50
[   52.634509]  el0_svc_common.constprop.0+0x120/0x1e0
[   52.639369]  el0_svc_handler+0x50/0x90
[   52.643106]  el0_svc+0x8/0xc

So this patch uses GFP_ATOMIC instead of GFP_KERNEL to fix it.

Fixes: d174ea75c9 ("net: hns3: add statistics for PFC frames and MAC control frames")
Signed-off-by: Zhongzhu Liu <liuzhongzhu@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:44:32 -07:00
YueHaibing
ca497fb6aa taprio: remove unused variable 'entry_list_policy'
net/sched/sch_taprio.c:680:32: warning:
 entry_list_policy defined but not used [-Wunused-const-variable=]

One of the points of commit a3d43c0d56 ("taprio: Add support adding
an admin schedule") is that it removes support (it now returns "not
supported") for schedules using the TCA_TAPRIO_ATTR_SCHED_SINGLE_ENTRY
attribute (which were never used), the parsing of those types of schedules
was the only user of this policy. So removing this policy should be fine.

Reported-by: Hulk Robot <hulkci@huawei.com>
Suggested-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:41:24 -07:00
Holger Hoffstätte
a7eb6a4f25 r8169: fix performance issue on RTL8168evl
Disabling TSO but leaving SG active results is a significant
performance drop. Therefore disable also SG on RTL8168evl.
This restores the original performance.

Fixes: 93681cd7d9 ("r8169: enable HW csum and TSO")
Signed-off-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:37:39 -07:00
Josh Hunt
1555e6fdf0 tcp: Update TCP_BASE_MSS comment
TCP_BASE_MSS is used as the default initial MSS value when MTU probing is
enabled. Update the comment to reflect this.

Suggested-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Josh Hunt <johunt@akamai.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:03:30 -07:00
Josh Hunt
c04b79b6cf tcp: add new tcp_mtu_probe_floor sysctl
The current implementation of TCP MTU probing can considerably
underestimate the MTU on lossy connections allowing the MSS to get down to
48. We have found that in almost all of these cases on our networks these
paths can handle much larger MTUs meaning the connections are being
artificially limited. Even though TCP MTU probing can raise the MSS back up
we have seen this not to be the case causing connections to be "stuck" with
an MSS of 48 when heavy loss is present.

Prior to pushing out this change we could not keep TCP MTU probing enabled
b/c of the above reasons. Now with a reasonble floor set we've had it
enabled for the past 6 months.

The new sysctl will still default to TCP_MIN_SND_MSS (48), but gives
administrators the ability to control the floor of MSS probing.

Signed-off-by: Josh Hunt <johunt@akamai.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 13:03:30 -07:00
Jiri Pirko
3a5e523479 devlink: remove pointless data_len arg from region snapshot create
The size of the snapshot has to be the same as the size of the region,
therefore no need to pass it again during snapshot creation. Remove the
arg and use region->size instead.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 11:21:46 -07:00
Eric Dumazet
1a9914884d tcp: batch calls to sk_flush_backlog()
Starting from commit d41a69f1d3 ("tcp: make tcp_sendmsg() aware of socket backlog")
loopback flows got hurt, because for each skb sent, the socket receives an
immediate ACK and sk_flush_backlog() causes extra work.

Intent was to not let the backlog grow too much, but we went a bit too far.

We can check the backlog every 16 skbs (about 1MB chunks)
to increase TCP over loopback performance by about 15 %

Note that the call to sk_flush_backlog() handles a single ACK,
thanks to coalescing done on backlog, but cleans the 16 skbs
found in rtx rb-tree.

Reported-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-09 11:03:27 -07:00
Daniel Borkmann
9f30cd568b Merge branch 'bpf-xdp-fwd-sample-improvements'
Jesper Dangaard Brouer says:

====================
V3: Hopefully fixed all issues point out by Yonghong Song

V2: Addressed issues point out by Yonghong Song
 - Please ACK patch 2/3 again
 - Added ACKs and reviewed-by to other patches

This patchset is focused on improvements for XDP forwarding sample
named xdp_fwd, which leverage the existing FIB routing tables as
described in LPC2018[1] talk by David Ahern.

The primary motivation is to illustrate how Toke's recent work
improves usability of XDP_REDIRECT via lookups in devmap. The other
patches are to help users understand the sample.

I have more improvements to xdp_fwd, but those might requires changes
to libbpf.  Thus, sending these patches first as they are isolated.

[1] http://vger.kernel.org/lpc-networking2018.html#session-1
====================

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-09 18:05:04 +02:00
Jesper Dangaard Brouer
abcce733ad samples/bpf: xdp_fwd explain bpf_fib_lookup return codes
Make it clear that this XDP program depend on the network
stack to do the ARP resolution.  This is connected with the
BPF_FIB_LKUP_RET_NO_NEIGH return code from bpf_fib_lookup().

Another common mistake (seen via XDP-tutorial) is that users
don't realize that sysctl net.ipv{4,6}.conf.all.forwarding
setting is honored by bpf_fib_lookup.

Reported-by: Anton Protopopov <a.s.protopopov@gmail.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Acked-by: Yonghong Song <yhs@fb.com>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-09 18:05:03 +02:00
Jesper Dangaard Brouer
a32a32cb26 samples/bpf: make xdp_fwd more practically usable via devmap lookup
This address the TODO in samples/bpf/xdp_fwd_kern.c, which points out
that the chosen egress index should be checked for existence in the
devmap. This can now be done via taking advantage of Toke's work in
commit 0cdbb4b09a ("devmap: Allow map lookups from eBPF").

This change makes xdp_fwd more practically usable, as this allows for
a mixed environment, where IP-forwarding fallback to network stack, if
the egress device isn't configured to use XDP.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-09 18:05:03 +02:00
Jesper Dangaard Brouer
3783d43752 samples/bpf: xdp_fwd rename devmap name to be xdp_tx_ports
The devmap name 'tx_port' came from a copy-paste from xdp_redirect_map
which only have a single TX port. Change name to xdp_tx_ports
to make it more descriptive.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Acked-by: Yonghong Song <yhs@fb.com>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-09 18:05:03 +02:00
Ivan Khoronzhuk
d9973cec9d xdp: xdp_umem: fix umem pages mapping for 32bits systems
Use kmap instead of page_address as it's not always in low memory.

Acked-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-09 18:02:19 +02:00
Denis Efremov
fcc32a2165 liquidio: Use pcie_flr() instead of reimplementing it
octeon_mbox_process_cmd() directly writes the PCI_EXP_DEVCTL_BCR_FLR
bit, which bypasses timing requirements imposed by the PCIe spec.
This patch fixes the function to use the pcie_flr() interface instead.

Signed-off-by: Denis Efremov <efremov@linux.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-08 22:41:02 -07:00
Heiner Kallweit
32879f0001 r8169: allocate rx buffers using alloc_pages_node
We allocate 16kb per rx buffer, so we can avoid some overhead by using
alloc_pages_node directly instead of bothering kmalloc_node. Due to
this change buffers are page-aligned now, therefore the alignment check
can be removed.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-08 22:34:55 -07:00
YueHaibing
018e5b4587 fq_codel: remove set but not used variables 'prev_ecn_mark' and 'prev_drop_count'
Fixes gcc '-Wunused-but-set-variable' warning:

net/sched/sch_fq_codel.c: In function fq_codel_dequeue:
net/sched/sch_fq_codel.c:288:23: warning: variable prev_ecn_mark set but not used [-Wunused-but-set-variable]
net/sched/sch_fq_codel.c:288:6: warning: variable prev_drop_count set but not used [-Wunused-but-set-variable]

They are not used since commit 77ddaff218 ("fq_codel: Kill
useless per-flow dropped statistic")

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-08 22:32:19 -07:00
Jiri Pirko
da382875c6 mlxsw: spectrum: Extend to support Spectrum-3 ASIC
Extend existing driver for Spectrum and Spectrum-2 ASICs
to support Spectrum-3 ASIC as well.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-08 22:27:09 -07:00
David S. Miller
eb716a649f Merge branch 'stmmac-next'
Jose Abreu says:

====================
net: stmmac: Improvements for -next

[ This is just a rebase of v2 into latest -next in order to avoid a merge
conflict ]

Couple of improvements for -next tree. More info in commit logs.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-08 22:20:19 -07:00
Jose Abreu
ccfc639a94 net: stmmac: selftests: Add a selftest for Flexible RX Parser
Add a selftest for the Flexible RX Parser feature.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-08 22:20:19 -07:00
Jose Abreu
d6e1c12cf9 net: stmmac: Add Flexible RX Parser support in XGMAC
XGMAC cores also support the Flexible RX Parser feature. Add the support
for it in the XGMAC core.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-08 22:20:19 -07:00