forked from Minki/linux
mainlining shenanigans
51a5365c2b
Eran Ben Elisha says: ==================== Devlink health reporting and recovery system The health mechanism is targeted for Real Time Alerting, in order to know when something bad had happened to a PCI device - Provide alert debug information - Self healing - If problem needs vendor support, provide a way to gather all needed debugging information. The main idea is to unify and centralize driver health reports in the generic devlink instance and allow the user to set different attributes of the health reporting and recovery procedures. The devlink health reporter: Device driver creates a "health reporter" per each error/health type. Error/Health type can be a known/generic (eg pci error, fw error, rx/tx error) or unknown (driver specific). For each registered health reporter a driver can issue error/health reports asynchronously. All health reports handling is done by devlink. Device driver can provide specific callbacks for each "health reporter", e.g. - Recovery procedures - Diagnostics and object dump procedures - OOB initial attributes Different parts of the driver can register different types of health reporters with different handlers. Once an error is reported, devlink health will do the following actions: * A log is being send to the kernel trace events buffer * Health status and statistics are being updated for the reporter instance * Object dump is being taken and saved at the reporter instance (as long as there is no other dump which is already stored) * Auto recovery attempt is being done. Depends on: - Auto-recovery configuration - Grace period vs. time passed since last recover The user interface: User can access/change each reporter attributes and driver specific callbacks via devlink, e.g per error type (per health reporter) - Configure reporter's generic attributes (like: Disable/enable auto recovery) - Invoke recovery procedure - Run diagnostics - Object dump The devlink health interface (via netlink): DEVLINK_CMD_HEALTH_REPORTER_GET Retrieves status and configuration info per DEV and reporter. DEVLINK_CMD_HEALTH_REPORTER_SET Allows reporter-related configuration setting. DEVLINK_CMD_HEALTH_REPORTER_RECOVER Triggers a reporter's recovery procedure. DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE Retrieves diagnostics data from a reporter on a device. DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET Retrieves the last stored dump. Devlink health saves a single dump. If an dump is not already stored by the devlink for this reporter, devlink generates a new dump. dump output is defined by the reporter. DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR Clears the last saved dump file for the specified reporter. netlink +--------------------------+ | | | + | | | | +--------------------------+ |request for ops |(diagnose, mlx5_core devlink |recover, |dump) +--------+ +--------------------------+ | | | reporter| | | | | +---------v----------+ | | | ops execution | | | | | <----------------------------------+ | | | | | | | | | | | + ^------------------+ | | | | | request for ops | | | | | (recover, dump) | | | | | | | | | +-+------------------+ | | | health report | | health handler | | | +-------------------------------> | | | | | +--------------------+ | | | health reporter create | | | +----------------------------> | +--------+ +--------------------------+ In this patchset, mlx5e TX reporter is implemented. v2: - Remove FW* reporters to decrease the amount of patches in the patchset ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
LICENSES | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.clang-format | ||
.cocciconfig | ||
.get_maintainer.ignore | ||
.gitattributes | ||
.gitignore | ||
.mailmap | ||
COPYING | ||
CREDITS | ||
Kbuild | ||
Kconfig | ||
MAINTAINERS | ||
Makefile | ||
README |
Linux kernel ============ There are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. Please read Documentation/admin-guide/README.rst first. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. The formatted documentation can also be read online at: https://www.kernel.org/doc/html/latest/ There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.