kernel/linux.git/drivers/fpga/dfl.h, branch v7.0.10

fpga: dfl: fix typo in header file

2026-01-22T09:08:06+00:00

fix typo "definitons" ==> "definitions" in DFHv1 Register Offset comment. Signed-off-by: Mukesh Kumar Sisodiya Link: https://lore.kernel.org/r/20251226150408.2802-1-mukeshkumarsisodiya1981@gmail.com Reviewed-by: Xu Yilun Signed-off-by: Xu Yilun

fpga: dfl: drop unneeded get_device() and put_device() of feature device

2024-12-18T14:28:48+00:00

The feature device data was originally stored as platform data, hence the memory allocation was tied to the lifetime of the feature device. Now that the feature device data is tied to the lifetime of the DFL PCIe FPGA device instead, get_device() and put_device() are no longer needed. Signed-off-by: Peter Colberg Reviewed-by: Matthew Gerlach Reviewed-by: Basheer Ahmed Muddebihal Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20241120011035.230574-18-peter.colberg@intel.com Signed-off-by: Xu Yilun

fpga: dfl: store platform device id in feature device data

2024-12-18T14:28:48+00:00

Delay the feature device id allocation from build_info_create_dev() to binfo_create_feature_dev_data() and store the id in the feature device data before copying it to the device. This will allow reusing the same id in a subsequent commit which completely destroys and recreates the feature device when releasing and reassigning the corresponding port. Instead of manually freeing the id when no longer needed, use a device-managed resource with a custom action to automatically free the id right before the feature device data is freed. The id registry is guaranteed to be allocated when dfl_id_free_action() is invoked, since the DFL PCIe device and its device-managed resources will be destroyed before dfl_ids_destroy() is called in dfl_fpga_exit(). Signed-off-by: Peter Colberg Reviewed-by: Matthew Gerlach Reviewed-by: Basheer Ahmed Muddebihal Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20241120011035.230574-15-peter.colberg@intel.com Signed-off-by: Xu Yilun

fpga: dfl: store platform device name in feature device data

2024-12-18T14:28:48+00:00

Add a new member, pdev_name, to the structure dfl_feature_dev_data that holds the platform device name for convenience. A subsequent commit will completely destroy the platform device during port release, after which fdata->dev is unavailable, while fdata itself remains available. Signed-off-by: Peter Colberg Reviewed-by: Matthew Gerlach Reviewed-by: Basheer Ahmed Muddebihal Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20241120011035.230574-14-peter.colberg@intel.com Signed-off-by: Xu Yilun

fpga: dfl: store MMIO resources in feature device data

2024-12-18T14:28:48+00:00

Instead of directly copying the MMIO resource of each feature to the feature device resources, add a new member to the feature device data to store the resources and copy them to the feature device using platform_device_add_resources(). This prepares a subsequent commit which completely destroys and recreates the feature device when releasing and reassigning the corresponding port, respectively. Signed-off-by: Peter Colberg Reviewed-by: Matthew Gerlach Reviewed-by: Basheer Ahmed Muddebihal Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20241120011035.230574-13-peter.colberg@intel.com Signed-off-by: Xu Yilun

fpga: dfl: convert features from flexible array member to separate array

2024-12-18T14:28:48+00:00

Use a separate array allocation for features and substitute a pointer for the flexible array member in the feature device data. A subsequent commit will add another array for resources. The current commit converts the flexible array member to a separate allocation for consistency. Signed-off-by: Peter Colberg Reviewed-by: Matthew Gerlach Reviewed-by: Basheer Ahmed Muddebihal Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20241120011035.230574-12-peter.colberg@intel.com Signed-off-by: Xu Yilun

fpga: dfl: factor out feature device data from platform device data

2024-12-18T14:28:48+00:00

Add a structure dfl_feature_dev_data to hold the DFL enumeration info previously held in dfl_feature_platform_data. Allocate the new structure using device-managed memory whose lifetime is bound to the lifetime of the physical DFL, e.g., PCIe FPGA device. In a subsequent commit, this will allow the feature platform device to be completely destroyed and recreated on port release and assign, respectively, while retaining the feature data in the new dfl_feature_dev_data structure. Signed-off-by: Peter Colberg Reviewed-by: Matthew Gerlach Reviewed-by: Basheer Ahmed Muddebihal Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20241120011035.230574-11-peter.colberg@intel.com Signed-off-by: Xu Yilun

fpga: dfl: refactor internal DFL APIs to take/return feature device data

2024-12-18T14:28:48+00:00

This change prepares a subsequent commit which factors out the DFL enumeration info from the structure dfl_feature_platform_data into a new structure dfl_feature_dev_data, whose lifetime is independent of the feature device which will be destroyed during port release. Add an alias dfl_feature_dev_data for dfl_feature_platform_data, and an alias to_dfl_feature_dev_data() for dev_get_platdata(), and refactor internal DFL APIs to take/return dfl_feature_dev_data instead. The aliases will be replaced with implementations in a subsequent commit. This change does not introduce any functional changes. Signed-off-by: Peter Colberg Reviewed-by: Matthew Gerlach Reviewed-by: Basheer Ahmed Muddebihal Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20241120011035.230574-9-peter.colberg@intel.com Signed-off-by: Xu Yilun

fpga: dfl: store FIU type in feature platform data

2024-12-18T14:28:48+00:00

Remove the local function feature_dev_id_type() in favor of persisting the FIU type in struct dfl_feature_platform_data. Add type to struct build_feature_devs_info and drop argument to build_info_create_dev(). Signed-off-by: Peter Colberg Reviewed-by: Matthew Gerlach Reviewed-by: Basheer Ahmed Muddebihal Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20241120011035.230574-8-peter.colberg@intel.com Signed-off-by: Xu Yilun

fpga: dfl: pass feature platform data instead of device as argument

2024-12-18T14:18:04+00:00

For functions which use the feature platform data, instead of invoking dev_get_platdata() on the device, directly pass the data as an argument. This patch is part of a refactoring of the internal DFL APIs to move the feature device data into a new struct dfl_feature_dev_data which lifetime is independent of the corresponding platform device. Signed-off-by: Peter Colberg Reviewed-by: Matthew Gerlach Reviewed-by: Basheer Ahmed Muddebihal Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20241120011035.230574-6-peter.colberg@intel.com Signed-off-by: Xu Yilun