6.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Rahul Rameshbabu <rrameshbabu@xxxxxxxxxx>
[ Upstream commit b608dd670bb69c89d5074685899d4c1089f57a16 ]
De-duplicate documentation by removing mellanox/mlx5/devlink.rst. Instead,
only use the generic devlink documentation directory to document mlx5
devlink parameters. Avoid providing general devlink tool usage information
in mlx5-specific documentation.
Signed-off-by: Rahul Rameshbabu <rrameshbabu@xxxxxxxxxx>
Reviewed-by: Jiri Pirko <jiri@xxxxxxxxxx>
Reviewed-by: Gal Pressman <gal@xxxxxxxxxx>
Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxx>
Stable-dep-of: 92214be5979c ("net/mlx5e: Update doorbell for port timestamping CQ before the software counter")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
.../ethernet/mellanox/mlx5/devlink.rst | 313 ------------------
.../ethernet/mellanox/mlx5/index.rst | 1 -
Documentation/networking/devlink/mlx5.rst | 179 ++++++++++
3 files changed, 179 insertions(+), 314 deletions(-)
delete mode 100644 Documentation/networking/device_drivers/ethernet/mellanox/mlx5/devlink.rst
diff --git a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/devlink.rst b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/devlink.rst
deleted file mode 100644
index a4edf908b707c..0000000000000
--- a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/devlink.rst
+++ /dev/null
@@ -1,313 +0,0 @@
-.. SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
-.. include:: <isonum.txt>
-
-=======
-Devlink
-=======
-
-:Copyright: |copy| 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-
-Contents
-========
-
-- `Info`_
-- `Parameters`_
-- `Health reporters`_
-
-Info
-====
-
-The devlink info reports the running and stored firmware versions on device.
-It also prints the device PSID which represents the HCA board type ID.
-
-User command example::
-
- $ devlink dev info pci/0000:00:06.0
- pci/0000:00:06.0:
- driver mlx5_core
- versions:
- fixed:
- fw.psid MT_0000000009
- running:
- fw.version 16.26.0100
- stored:
- fw.version 16.26.0100
-
-Parameters
-==========
-
-flow_steering_mode: Device flow steering mode
----------------------------------------------
-The flow steering mode parameter controls the flow steering mode of the driver.
-Two modes are supported:
-
-1. 'dmfs' - Device managed flow steering.
-2. 'smfs' - Software/Driver managed flow steering.
-
-In DMFS mode, the HW steering entities are created and managed through the
-Firmware.
-In SMFS mode, the HW steering entities are created and managed though by
-the driver directly into hardware without firmware intervention.
-
-SMFS mode is faster and provides better rule insertion rate compared to default DMFS mode.
-
-User command examples:
-
-- Set SMFS flow steering mode::
-
- $ devlink dev param set pci/0000:06:00.0 name flow_steering_mode value "smfs" cmode runtime
-
-- Read device flow steering mode::
-
- $ devlink dev param show pci/0000:06:00.0 name flow_steering_mode
- pci/0000:06:00.0:
- name flow_steering_mode type driver-specific
- values:
- cmode runtime value smfs
-
-enable_roce: RoCE enablement state
-----------------------------------
-If the device supports RoCE disablement, RoCE enablement state controls device
-support for RoCE capability. Otherwise, the control occurs in the driver stack.
-When RoCE is disabled at the driver level, only raw ethernet QPs are supported.
-
-To change RoCE enablement state, a user must change the driverinit cmode value
-and run devlink reload.
-
-User command examples:
-
-- Disable RoCE::
-
- $ devlink dev param set pci/0000:06:00.0 name enable_roce value false cmode driverinit
- $ devlink dev reload pci/0000:06:00.0
-
-- Read RoCE enablement state::
-
- $ devlink dev param show pci/0000:06:00.0 name enable_roce
- pci/0000:06:00.0:
- name enable_roce type generic
- values:
- cmode driverinit value true
-
-esw_port_metadata: Eswitch port metadata state
-----------------------------------------------
-When applicable, disabling eswitch metadata can increase packet rate
-up to 20% depending on the use case and packet sizes.
-
-Eswitch port metadata state controls whether to internally tag packets with
-metadata. Metadata tagging must be enabled for multi-port RoCE, failover
-between representors and stacked devices.
-By default metadata is enabled on the supported devices in E-switch.
-Metadata is applicable only for E-switch in switchdev mode and
-users may disable it when NONE of the below use cases will be in use:
-
-1. HCA is in Dual/multi-port RoCE mode.
-2. VF/SF representor bonding (Usually used for Live migration)
-3. Stacked devices
-
-When metadata is disabled, the above use cases will fail to initialize if
-users try to enable them.
-
-- Show eswitch port metadata::
-
- $ devlink dev param show pci/0000:06:00.0 name esw_port_metadata
- pci/0000:06:00.0:
- name esw_port_metadata type driver-specific
- values:
- cmode runtime value true
-
-- Disable eswitch port metadata::
-
- $ devlink dev param set pci/0000:06:00.0 name esw_port_metadata value false cmode runtime
-
-- Change eswitch mode to switchdev mode where after choosing the metadata value::
-
- $ devlink dev eswitch set pci/0000:06:00.0 mode switchdev
-
-hairpin_num_queues: Number of hairpin queues
---------------------------------------------
-We refer to a TC NIC rule that involves forwarding as "hairpin".
-
-Hairpin queues are mlx5 hardware specific implementation for hardware
-forwarding of such packets.
-
-- Show the number of hairpin queues::
-
- $ devlink dev param show pci/0000:06:00.0 name hairpin_num_queues
- pci/0000:06:00.0:
- name hairpin_num_queues type driver-specific
- values:
- cmode driverinit value 2
-
-- Change the number of hairpin queues::
-
- $ devlink dev param set pci/0000:06:00.0 name hairpin_num_queues value 4 cmode driverinit
-
-hairpin_queue_size: Size of the hairpin queues
-----------------------------------------------
-Control the size of the hairpin queues.
-
-- Show the size of the hairpin queues::
-
- $ devlink dev param show pci/0000:06:00.0 name hairpin_queue_size
- pci/0000:06:00.0:
- name hairpin_queue_size type driver-specific
- values:
- cmode driverinit value 1024
-
-- Change the size (in packets) of the hairpin queues::
-
- $ devlink dev param set pci/0000:06:00.0 name hairpin_queue_size value 512 cmode driverinit
-
-Health reporters
-================
-
-tx reporter
------------
-The tx reporter is responsible for reporting and recovering of the following two error scenarios:
-
-- tx timeout
- Report on kernel tx timeout detection.
- Recover by searching lost interrupts.
-- tx error completion
- Report on error tx completion.
- Recover by flushing the tx queue and reset it.
-
-tx reporter also support on demand diagnose callback, on which it provides
-real time information of its send queues status.
-
-User commands examples:
-
-- Diagnose send queues status::
-
- $ devlink health diagnose pci/0000:82:00.0 reporter tx
-
-.. note::
- This command has valid output only when interface is up, otherwise the command has empty output.
-
-- Show number of tx errors indicated, number of recover flows ended successfully,
- is autorecover enabled and graceful period from last recover::
-
- $ devlink health show pci/0000:82:00.0 reporter tx
-
-rx reporter
------------
-The rx reporter is responsible for reporting and recovering of the following two error scenarios:
-
-- rx queues' initialization (population) timeout
- Population of rx queues' descriptors on ring initialization is done
- in napi context via triggering an irq. In case of a failure to get
- the minimum amount of descriptors, a timeout would occur, and
- descriptors could be recovered by polling the EQ (Event Queue).
-- rx completions with errors (reported by HW on interrupt context)
- Report on rx completion error.
- Recover (if needed) by flushing the related queue and reset it.
-
-rx reporter also supports on demand diagnose callback, on which it
-provides real time information of its receive queues' status.
-
-- Diagnose rx queues' status and corresponding completion queue::
-
- $ devlink health diagnose pci/0000:82:00.0 reporter rx
-
-NOTE: This command has valid output only when interface is up. Otherwise, the command has empty output.
-
-- Show number of rx errors indicated, number of recover flows ended successfully,
- is autorecover enabled, and graceful period from last recover::
-
- $ devlink health show pci/0000:82:00.0 reporter rx
-
-fw reporter
------------
-The fw reporter implements `diagnose` and `dump` callbacks.
-It follows symptoms of fw error such as fw syndrome by triggering
-fw core dump and storing it into the dump buffer.
-The fw reporter diagnose command can be triggered any time by the user to check
-current fw status.
-
-User commands examples:
-
-- Check fw heath status::
-
- $ devlink health diagnose pci/0000:82:00.0 reporter fw
-
-- Read FW core dump if already stored or trigger new one::
-
- $ devlink health dump show pci/0000:82:00.0 reporter fw
-
-.. note::
- This command can run only on the PF which has fw tracer ownership,
- running it on other PF or any VF will return "Operation not permitted".
-
-fw fatal reporter
------------------
-The fw fatal reporter implements `dump` and `recover` callbacks.
-It follows fatal errors indications by CR-space dump and recover flow.
-The CR-space dump uses vsc interface which is valid even if the FW command
-interface is not functional, which is the case in most FW fatal errors.
-The recover function runs recover flow which reloads the driver and triggers fw
-reset if needed.
-On firmware error, the health buffer is dumped into the dmesg. The log
-level is derived from the error's severity (given in health buffer).
-
-User commands examples:
-
-- Run fw recover flow manually::
-
- $ devlink health recover pci/0000:82:00.0 reporter fw_fatal
-
-- Read FW CR-space dump if already stored or trigger new one::
-
- $ devlink health dump show pci/0000:82:00.1 reporter fw_fatal
-
-.. note::
- This command can run only on PF.
-
-vnic reporter
--------------
-The vnic reporter implements only the `diagnose` callback.
-It is responsible for querying the vnic diagnostic counters from fw and displaying
-them in realtime.
-
-Description of the vnic counters:
-
-- total_q_under_processor_handle
- number of queues in an error state due to
- an async error or errored command.
-- send_queue_priority_update_flow
- number of QP/SQ priority/SL update events.
-- cq_overrun
- number of times CQ entered an error state due to an overflow.
-- async_eq_overrun
- number of times an EQ mapped to async events was overrun.
- comp_eq_overrun number of times an EQ mapped to completion events was
- overrun.
-- quota_exceeded_command
- number of commands issued and failed due to quota exceeded.
-- invalid_command
- number of commands issued and failed dues to any reason other than quota
- exceeded.
-- nic_receive_steering_discard
- number of packets that completed RX flow
- steering but were discarded due to a mismatch in flow table.
-- generated_pkt_steering_fail
- number of packets generated by the VNIC experiencing unexpected steering
- failure (at any point in steering flow).
-- handled_pkt_steering_fail
- number of packets handled by the VNIC experiencing unexpected steering
- failure (at any point in steering flow owned by the VNIC, including the FDB
- for the eswitch owner).
-
-User commands examples:
-
-- Diagnose PF/VF vnic counters::
-
- $ devlink health diagnose pci/0000:82:00.1 reporter vnic
-
-- Diagnose representor vnic counters (performed by supplying devlink port of the
- representor, which can be obtained via devlink port command)::
-
- $ devlink health diagnose pci/0000:82:00.1/65537 reporter vnic
-
-.. note::
- This command can run over all interfaces such as PF/VF and representor ports.
diff --git a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/index.rst b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/index.rst
index 3fdcd6b61ccfa..581a91caa5795 100644
--- a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/index.rst
+++ b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/index.rst
@@ -13,7 +13,6 @@ Contents:
:maxdepth: 2
kconfig
- devlink
switchdev
tracepoints
counters
diff --git a/Documentation/networking/devlink/mlx5.rst b/Documentation/networking/devlink/mlx5.rst
index 202798d6501e7..196a4bb28df1e 100644
--- a/Documentation/networking/devlink/mlx5.rst
+++ b/Documentation/networking/devlink/mlx5.rst
@@ -18,6 +18,11 @@ Parameters
* - ``enable_roce``
- driverinit
- Type: Boolean
+
+ If the device supports RoCE disablement, RoCE enablement state controls
+ device support for RoCE capability. Otherwise, the control occurs in the
+ driver stack. When RoCE is disabled at the driver level, only raw
+ ethernet QPs are supported.
* - ``io_eq_size``
- driverinit
- The range is between 64 and 4096.
@@ -48,6 +53,9 @@ parameters.
* ``smfs`` Software managed flow steering. In SMFS mode, the HW
steering entities are created and manage through the driver without
firmware intervention.
+
+ SMFS mode is faster and provides better rule insertion rate compared to
+ default DMFS mode.
* - ``fdb_large_groups``
- u32
- driverinit
@@ -71,7 +79,24 @@ parameters.
deprecated.
Default: disabled
+ * - ``esw_port_metadata``
+ - Boolean
+ - runtime
+ - When applicable, disabling eswitch metadata can increase packet rate up
+ to 20% depending on the use case and packet sizes.
+
+ Eswitch port metadata state controls whether to internally tag packets
+ with metadata. Metadata tagging must be enabled for multi-port RoCE,
+ failover between representors and stacked devices. By default metadata is
+ enabled on the supported devices in E-switch. Metadata is applicable only
+ for E-switch in switchdev mode and users may disable it when NONE of the
+ below use cases will be in use:
+ 1. HCA is in Dual/multi-port RoCE mode.
+ 2. VF/SF representor bonding (Usually used for Live migration)
+ 3. Stacked devices
+ When metadata is disabled, the above use cases will fail to initialize if
+ users try to enable them.
* - ``hairpin_num_queues``
- u32
- driverinit
@@ -104,3 +129,157 @@ The ``mlx5`` driver reports the following versions
* - ``fw.version``
- stored, running
- Three digit major.minor.subminor firmware version number.
+
+Health reporters
+================
+
+tx reporter
+-----------
+The tx reporter is responsible for reporting and recovering of the following two error scenarios:
+
+- tx timeout
+ Report on kernel tx timeout detection.
+ Recover by searching lost interrupts.
+- tx error completion
+ Report on error tx completion.
+ Recover by flushing the tx queue and reset it.
+
+tx reporter also support on demand diagnose callback, on which it provides
+real time information of its send queues status.
+
+User commands examples:
+
+- Diagnose send queues status::
+
+ $ devlink health diagnose pci/0000:82:00.0 reporter tx
+
+.. note::
+ This command has valid output only when interface is up, otherwise the command has empty output.
+
+- Show number of tx errors indicated, number of recover flows ended successfully,
+ is autorecover enabled and graceful period from last recover::
+
+ $ devlink health show pci/0000:82:00.0 reporter tx
+
+rx reporter
+-----------
+The rx reporter is responsible for reporting and recovering of the following two error scenarios:
+
+- rx queues' initialization (population) timeout
+ Population of rx queues' descriptors on ring initialization is done
+ in napi context via triggering an irq. In case of a failure to get
+ the minimum amount of descriptors, a timeout would occur, and
+ descriptors could be recovered by polling the EQ (Event Queue).
+- rx completions with errors (reported by HW on interrupt context)
+ Report on rx completion error.
+ Recover (if needed) by flushing the related queue and reset it.
+
+rx reporter also supports on demand diagnose callback, on which it
+provides real time information of its receive queues' status.
+
+- Diagnose rx queues' status and corresponding completion queue::
+
+ $ devlink health diagnose pci/0000:82:00.0 reporter rx
+
+.. note::
+ This command has valid output only when interface is up. Otherwise, the command has empty output.
+
+- Show number of rx errors indicated, number of recover flows ended successfully,
+ is autorecover enabled, and graceful period from last recover::
+
+ $ devlink health show pci/0000:82:00.0 reporter rx
+
+fw reporter
+-----------
+The fw reporter implements `diagnose` and `dump` callbacks.
+It follows symptoms of fw error such as fw syndrome by triggering
+fw core dump and storing it into the dump buffer.
+The fw reporter diagnose command can be triggered any time by the user to check
+current fw status.
+
+User commands examples:
+
+- Check fw heath status::
+
+ $ devlink health diagnose pci/0000:82:00.0 reporter fw
+
+- Read FW core dump if already stored or trigger new one::
+
+ $ devlink health dump show pci/0000:82:00.0 reporter fw
+
+.. note::
+ This command can run only on the PF which has fw tracer ownership,
+ running it on other PF or any VF will return "Operation not permitted".
+
+fw fatal reporter
+-----------------
+The fw fatal reporter implements `dump` and `recover` callbacks.
+It follows fatal errors indications by CR-space dump and recover flow.
+The CR-space dump uses vsc interface which is valid even if the FW command
+interface is not functional, which is the case in most FW fatal errors.
+The recover function runs recover flow which reloads the driver and triggers fw
+reset if needed.
+On firmware error, the health buffer is dumped into the dmesg. The log
+level is derived from the error's severity (given in health buffer).
+
+User commands examples:
+
+- Run fw recover flow manually::
+
+ $ devlink health recover pci/0000:82:00.0 reporter fw_fatal
+
+- Read FW CR-space dump if already stored or trigger new one::
+
+ $ devlink health dump show pci/0000:82:00.1 reporter fw_fatal
+
+.. note::
+ This command can run only on PF.
+
+vnic reporter
+-------------
+The vnic reporter implements only the `diagnose` callback.
+It is responsible for querying the vnic diagnostic counters from fw and displaying
+them in realtime.
+
+Description of the vnic counters:
+
+- total_q_under_processor_handle
+ number of queues in an error state due to
+ an async error or errored command.
+- send_queue_priority_update_flow
+ number of QP/SQ priority/SL update events.
+- cq_overrun
+ number of times CQ entered an error state due to an overflow.
+- async_eq_overrun
+ number of times an EQ mapped to async events was overrun.
+ comp_eq_overrun number of times an EQ mapped to completion events was
+ overrun.
+- quota_exceeded_command
+ number of commands issued and failed due to quota exceeded.
+- invalid_command
+ number of commands issued and failed dues to any reason other than quota
+ exceeded.
+- nic_receive_steering_discard
+ number of packets that completed RX flow
+ steering but were discarded due to a mismatch in flow table.
+- generated_pkt_steering_fail
+ number of packets generated by the VNIC experiencing unexpected steering
+ failure (at any point in steering flow).
+- handled_pkt_steering_fail
+ number of packets handled by the VNIC experiencing unexpected steering
+ failure (at any point in steering flow owned by the VNIC, including the FDB
+ for the eswitch owner).
+
+User commands examples:
+
+- Diagnose PF/VF vnic counters::
+
+ $ devlink health diagnose pci/0000:82:00.1 reporter vnic
+
+- Diagnose representor vnic counters (performed by supplying devlink port of the
+ representor, which can be obtained via devlink port command)::
+
+ $ devlink health diagnose pci/0000:82:00.1/65537 reporter vnic
+
+.. note::
+ This command can run over all interfaces such as PF/VF and representor ports.
--
2.42.0
