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Enable accelerated Receive Flow Steering (aRFS). It is used to steer Rx flows to a specific queue. This functionality is triggered by the network stack through ndo_rx_flow_steer and requires Flow Director (ntuple on) to function. The fltr_info is used to add/remove/update flow rules in the HW, the fltr_state is used to determine what to do with the filter with respect to HW and/or SW, and the flow_id is used in co-ordination with the network stack. The work for aRFS is split into two paths: the ndo_rx_flow_steer operation and the ice_service_task. The former is where the kernel hands us an Rx SKB among other items to setup aRFS and the latter is where the driver adds/updates/removes filter rules from HW and updates filter state. In the Rx path the following things can happen: 1. New aRFS entries are added to the hash table and the state is set to ICE_ARFS_INACTIVE so the filter can be updated in HW by the ice_service_task path. 2. aRFS entries have their Rx Queue updated if we receive a pre-existing flow_id and the filter state is ICE_ARFS_ACTIVE. The state is set to ICE_ARFS_INACTIVE so the filter can be updated in HW by the ice_service_task path. 3. aRFS entries marked as ICE_ARFS_TODEL are deleted In the ice_service_task path the following things can happen: 1. New aRFS entries marked as ICE_ARFS_INACTIVE are added or updated in HW. and their state is updated to ICE_ARFS_ACTIVE. 2. aRFS entries are deleted from HW and their state is updated to ICE_ARFS_TODEL. Signed-off-by: Brett Creeley <brett.creeley@intel.com> Signed-off-by: Madhu Chittim <madhu.chittim@intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> |
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block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
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.