Re: [PATCH v7 0/3] fpga: Use standard class dev_release function

[Xu Yilun <yilun.xu@intel.com>]

Sorry, I missed another one. The Documentations in
Documentation/driver-api/fpga should be updated.

Thanks,
Yilun

On Tue, Jun 22, 2021 at 06:11:48PM -0700, Russ Weight wrote:
> The FPGA framework has a convention of using managed resource functions
> to allow parent drivers to manage the data structures allocated by the
> class drivers. They use an empty *_dev_release() function to satisfy the
> class driver.
> 
> This is inconsistent with linux driver model.
> 
> These changes remove the managed resource functions and populate the class
> dev_release callback functions. They also merge the create() and register()
> functions into a single register() or register_simple() function for each of
> the fpga-mgr, fpga-region, and fpga-bridge class drivers.
> 
> The new *register() functions accept an info data structure to provide
> flexibility in passing optional parameters. The *register_simple()
> functions support the legacy parameter list for users that don't require
> the use of optional parameters.
> 
> For more context, refer to this email thread:
> 
> https://marc.info/?l=linux-fpga&m=162127412218557&w=2
> 
> I turned on the configs assocated with each of the modified files, but I
> must have been missing some dependencies, because not all of them compiled.
> I did a run-time test specifically with the dfl-fme infrastructure. This
> would have exercised the region, bridge, and fpga-mgr frameworks.
> 
> Changelog v6 -> v7:
>   - Update the commit messages to describe the new parameters for the
>     *register() functions and to mention the *register_simple() functions.
>   - Fix function prototypes in header file to rename dev to parent.
>   - Make use of the PTR_ERR_OR_ZERO() macro when possible.
>   - Some cleanup of comments.
>   - Update function defintions/prototypes to apply const to the new info
>     parameter.
>   - Verify that info->br_ops is non-null in the fpga_bridge_register()
>     function.
>   - Verify a non-null info pointer in the fpga_region_register() function.
> 
> Changelog v5 -> v6:
>   - Moved FPGA manager/bridge/region optional parameters out of the ops
>     structure and back into the FPGA class driver structure.
>   - Changed fpga_*_register() function parameters to accept an info data
>     structure to provide flexibility in passing optional parameters.
>   - Added fpga_*_register_simple() functions to support current parameters
>     for users that don't require use of optional parameters.
> 
> Changelog v4 -> v5:
>   - Rebased on top of recently accepted patches.
>   - Removed compat_id from the fpga_mgr_register() parameter list
>     and added it to the fpga_manager_ops structure. This also required
>     dynamically allocating the dfl-fme-ops structure in order to add
>     the appropriate compat_id.
>   - Created the fpga_region_ops data structure which is optionally passed
>     to fpga_region_register(). compat_id, the get_bridges() pointer, and
>     the priv pointer are included in the fpga_region_ops structure.
> 
> Changelog v3 -> v4:
>   - Added the compat_id parameter to fpga_mgr_register() and
>     devm_fpga_mgr_register() to ensure that the compat_id is set before
>     the device_register() call.
>   - Added the compat_id parameter to fpga_region_register() to ensure
>     that the compat_id is set before the device_register() call.
>   - Modified the dfl_fpga_feature_devs_enumerate() function to restore
>     the fpga_region_register() call to the correct location.
> 
> Changelog v2 -> v3:
>   - Cleaned up comment headers for fpga_mgr_register(), fpga_bridge_register(),
>     and fpga_region_register().
>   - Fixed error return on ida_simple_get() failure for fpga_mgr_register(),
>     fpga_bridge_register(), and fpga_region_register().
>   - Fixed error return value for fpga_bridge_register(): ERR_PTR(ret) instead
>     of NULL.
> 
> Changelog v1 -> v2:
>   - Restored devm_fpga_mgr_register() functionality to the fpga-mgr
>     class driver, adapted for the combined create/register functionality.
>   - All previous callers of devm_fpga_mgr_register() will continue to call
>     devm_fpga_mgr_register().
>   - replaced unnecessary ternary operators in return statements with
>     standard if conditions.
> 
> Russ Weight (3):
>   fpga: mgr: Use standard dev_release for class driver
>   fpga: bridge: Use standard dev_release for class driver
>   fpga: region: Use standard dev_release for class driver
> 
>  drivers/fpga/altera-cvp.c           |  12 +-
>  drivers/fpga/altera-fpga2sdram.c    |  12 +-
>  drivers/fpga/altera-freeze-bridge.c |  10 +-
>  drivers/fpga/altera-hps2fpga.c      |  12 +-
>  drivers/fpga/altera-pr-ip-core.c    |   8 +-
>  drivers/fpga/altera-ps-spi.c        |   9 +-
>  drivers/fpga/dfl-fme-br.c           |  10 +-
>  drivers/fpga/dfl-fme-mgr.c          |  22 ++-
>  drivers/fpga/dfl-fme-region.c       |  17 ++-
>  drivers/fpga/dfl.c                  |  12 +-
>  drivers/fpga/fpga-bridge.c          | 138 +++++++-----------
>  drivers/fpga/fpga-mgr.c             | 214 ++++++++++++----------------
>  drivers/fpga/fpga-region.c          | 121 ++++++----------
>  drivers/fpga/ice40-spi.c            |   9 +-
>  drivers/fpga/machxo2-spi.c          |  10 +-
>  drivers/fpga/of-fpga-region.c       |  11 +-
>  drivers/fpga/socfpga-a10.c          |  16 +--
>  drivers/fpga/socfpga.c              |   9 +-
>  drivers/fpga/stratix10-soc.c        |  16 +--
>  drivers/fpga/ts73xx-fpga.c          |   9 +-
>  drivers/fpga/xilinx-pr-decoupler.c  |  17 +--
>  drivers/fpga/xilinx-spi.c           |  11 +-
>  drivers/fpga/zynq-fpga.c            |  16 +--
>  drivers/fpga/zynqmp-fpga.c          |   9 +-
>  include/linux/fpga/fpga-bridge.h    |  33 +++--
>  include/linux/fpga/fpga-mgr.h       |  62 +++++---
>  include/linux/fpga/fpga-region.h    |  36 +++--
>  27 files changed, 371 insertions(+), 490 deletions(-)
> 
> -- 
> 2.25.1