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Documentation: driver-api: add stratix10 service layer 

Add Intel Stratix10 service layer driver document

Signed-off-by: Richard Gong <richard.gong@intel.com>
Signed-off-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Richard Gong 2018-11-13 12:14:05 -06:00 committed by Greg Kroah-Hartman
parent e7eef1d763
commit 0d5c06aa0e
1 changed files with 30 additions and 0 deletions
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30
Documentation/driver-api/firmware/other_interfaces.rst
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@ -13,3 +13,33 @@ EDD Interfaces
.. kernel-doc:: drivers/firmware/edd.c
:internal:
Intel Stratix10 SoC Service Layer
---------------------------------
Some features of the Intel Stratix10 SoC require a level of privilege
higher than the kernel is granted. Such secure features include
FPGA programming. In terms of the ARMv8 architecture, the kernel runs
at Exception Level 1 (EL1), access to the features requires
Exception Level 3 (EL3).
The Intel Stratix10 SoC service layer provides an in kernel API for
drivers to request access to the secure features. The requests are queued
and processed one by one. ARM’s SMCCC is used to pass the execution
of the requests on to a secure monitor (EL3).
.. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h
:functions: stratix10_svc_command_code
.. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h
:functions: stratix10_svc_client_msg
.. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h
:functions: stratix10_svc_command_reconfig_payload
.. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h
:functions: stratix10_svc_cb_data
.. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h
:functions: stratix10_svc_client
.. kernel-doc:: drivers/firmware/stratix10-svc.c
:export: