qat_4xxx devices can be configured to allow either crypto or compression
operations. By default, devices are configured statically according
to following rule:
- odd numbered devices assigned to compression services
- even numbered devices assigned to crypto services
This set exposes two attributes in sysfs that allow to report and change
the state and the configuration of a QAT 4xxx device.
The first, /sys/bus/pci/devices/<BDF>/qat/state, allows to bring a
device down in order to change the configuration, and bring it up again.
The second, /sys/bus/pci/devices/<BDF>/qat/cfg_services, allows to
inspect the current configuration of a device (i.e. crypto or
compression) and change it.
# cat /sys/bus/pci/devices/<BDF>/qat/state
up
# cat /sys/bus/pci/devices/<BDF>/qat/cfg_services
sym;asym
# echo down > /sys/bus/pci/devices/<BDF>/qat/state
# echo dc > /sys/bus/pci/devices/<BDF>/qat/cfg_services
# echo up > /sys/bus/pci/devices/<BDF>/qat/state
# cat /sys/bus/pci/devices/<BDF>/qat/state
dc
Changes from v1:
- Updated target kernel version in documentation (from 5.19 to 5.20).
- Fixed commit message in patch #1 and updated documentation in patch
#4 after review from Vladis Dronov.
Giovanni Cabiddu (4):
crypto: qat - expose device state through sysfs for 4xxx
crypto: qat - change behaviour of adf_cfg_add_key_value_param()
crypto: qat - relocate and rename adf_sriov_prepare_restart()
crypto: qat - expose device config through sysfs for 4xxx
Documentation/ABI/testing/sysfs-driver-qat | 61 ++++++
.../crypto/qat/qat_4xxx/adf_4xxx_hw_data.c | 1 +
.../crypto/qat/qat_4xxx/adf_4xxx_hw_data.h | 1 +
drivers/crypto/qat/qat_4xxx/adf_drv.c | 6 +-
drivers/crypto/qat/qat_common/Makefile | 1 +
.../crypto/qat/qat_common/adf_accel_devices.h | 1 +
drivers/crypto/qat/qat_common/adf_cfg.c | 41 +++-
.../crypto/qat/qat_common/adf_common_drv.h | 3 +
drivers/crypto/qat/qat_common/adf_init.c | 26 +++
drivers/crypto/qat/qat_common/adf_sriov.c | 28 +--
drivers/crypto/qat/qat_common/adf_sysfs.c | 191 ++++++++++++++++++
11 files changed, 331 insertions(+), 29 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-driver-qat
create mode 100644 drivers/crypto/qat/qat_common/adf_sysfs.c
--
2.36.1
