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* fpga: add devm_fpga_region_createAlan Tull2018-10-161-8/+57
| | | | | | | | | | | | | Add devm_fpga_region_create() which is the managed version of fpga_region_create(). Change current region drivers to use devm_fpga_region_create(). Signed-off-by: Alan Tull <atull@kernel.org> Suggested-by: Federico Vaga <federico.vaga@cern.ch> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: add compat_id supportWu Hao2018-07-151-0/+22
| | | | | | | | | | | | This patch introduces a compat_id pointer member and sysfs interface for each fpga region, similar as compat_id for fpga manager, it allows applications to read the per region compat_id for compatibility checking before other actions on this fpga-region (e.g. PR). Signed-off-by: Wu Hao <hao.wu@intel.com> Acked-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: clarify that unregister functions also freeAlan Tull2018-05-251-1/+1
| | | | | | | | | | | The following functions also free the struct. Add that fact to the function documentation. - fpga_mgr_free - fpga_bridge_free - fpga_region_free Signed-off-by: Alan Tull <atull@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: kernel-doc fixesAlan Tull2018-05-251-2/+5
| | | | | | | | | Fix formatting and some cleanup for the kernel-doc documentation in fpga-region.c Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: use SPDXAlan Tull2018-05-251-13/+1
| | | | | | | | Replace GPLv2 boilerplate with SPDX in FPGA code that came from me or from Altera. Signed-off-by: Alan Tull <atull@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: change api, add fpga_region_create/freeAlan Tull2018-05-251-13/+55
| | | | | | | | | | | | | | | | | | | | | | | | Add fpga_region_create/free API functions. Change fpga_region_register to take FPGA region struct as the only parameter. Change fpga_region_unregister to return void. struct fpga_region *fpga_region_create(struct device *dev, struct fpga_manager *mgr, int (*get_bridges)(struct fpga_region *)); void fpga_region_free(struct fpga_region *region); int fpga_region_register(struct fpga_region *region); void fpga_region_unregister(struct fpga_region *region); Remove groups storage from struct fpga_region, it's not needed. Callers can just "region->dev.groups = groups;" after calling fpga_region_create. Update the drivers that call fpga_region_register with the new API. Signed-off-by: Alan Tull <atull@kernel.org> Signed-off-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: don't use drvdata in common fpga codeAlan Tull2018-05-251-1/+0
| | | | | | | | | | | | | | | Changes to fpga_region_register function to not set drvdata. Setting drvdata is fine for DT based devices that will have one region per platform device. However PCIe based devices may have multiple FPGA regions under one PCIe device. Without these changes, the PCIe solution has to create an extra device for each child region to hold drvdata. Signed-off-by: Alan Tull <atull@kernel.org> Reported-by: Jiuyue Ma <majiuyue@huawei.com> Signed-off-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: fpga-region: comment on fpga_region_program_fpga lockingAlan Tull2018-04-231-0/+5
| | | | | | | | | Add a comment to the header of fpga_region_program_fpga() regarding locking of the bridges. Signed-off-by: Alan Tull <atull@kernel.org> Signed-off-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: add attribute groupsAlan Tull2017-11-281-0/+1
| | | | | | | | | | | | Make it easy to add attributes to low level FPGA drivers the right way. Add attribute groups pointers to structures that are used when registering a manager, bridge, or group. When the low level driver registers, set the device attribute group. The attributes are created in device_add. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: move device tree support to of-fpga-region.cAlan Tull2017-11-281-451/+1
| | | | | | | | | | | | | | | | | | | | | | | | | Create of-fpga-region.c and move the following functions without modification from fpga-region.c. * of_fpga_region_find * of_fpga_region_get_mgr * of_fpga_region_get_bridges * child_regions_with_firmware * of_fpga_region_parse_ov * of_fpga_region_notify_pre_apply * of_fpga_region_notify_post_remove * of_fpga_region_notify * of_fpga_region_probe * of_fpga_region_remove Create two new functions with some code from fpga_region_init/exit. * of_fpga_region_init * of_fpga_region_exit Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: add fpga_region_class_findAlan Tull2017-11-281-8/+15
| | | | | | | | | | | | Add a function for searching the fpga-region class. This will be useful when device tree code is no longer in the same file that declares the fpga-region class. Another step in separating common FPGA region code from device tree support. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: add register/unregister functionsAlan Tull2017-11-281-40/+65
| | | | | | | | | | | | | | | | Another step in separating common code from device tree specific code for FPGA regions. * add FPGA region register/unregister functions. * add the register/unregister functions to the header * use devm_kzalloc to alloc the region. * add a method for getting bridges to the region struct * add priv to the region struct * use region->info in of_fpga_region_get_bridges Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: rename some functions prior to movingAlan Tull2017-11-281-29/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename some functions that will be moved to of-fpga-region.c. Also change some parameters and export a function to help with refactoring. This is a step towards the larger goal of separating device tree support from FPGA region common code. * fpga_region_get_manager -> of_fpga_region_get_mgr * add 'of_' prefix to the following: * fpga_region_find * fpga_region_get_bridges * fpga_region_notify_pre_apply * fpga_region_notify_post_remove), * fpga_region_probe/remove Parameter changes: * of_fpga_region_find change parameter to be the device node of the region. * of_fpga_region_get_bridges change second parameter to FPGA image info. Export of_fpga_region_find as well. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: add fpga-region.h headerAlan Tull2017-11-281-20/+4
| | | | | | | | | | | | | * Create fpga-region.h. * Export fpga_region_program_fpga. * Move struct fpga_region and other things to the header. This is a step in separating FPGA region common code from Device Tree support. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: separate out code that parses the overlayAlan Tull2017-11-281-49/+73
| | | | | | | | | | | | | | New function of_fpga_region_parse_ov added, moving code from fpga_region_notify_pre_apply. This function gets the FPGA image info from the overlay and is able to simplify some of the logic involved. This is a baby step in refactoring the FPGA region code to separate out common code from Device Tree overlay support. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: use image info as parameter for programming regionAlan Tull2017-11-281-7/+9
| | | | | | | | | | | | | Use FPGA image info (region->info) when region code is programming the FPGA to pass in multiple parameters. This is a baby step in refactoring the FPGA region code to separate out common FPGA region code from FPGA region Device Tree overlay support. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: fix slow warning with more than one overlayAlan Tull2017-11-281-0/+5
| | | | | | | | | | | | | | | | | | | When DT overlays are applied, each FPGA region keeps track of the fpga image info as region->info. This pointer is assigned only if an overlay causes the FPGA to be programmed. As it stands, this pointer can be overwritten, causing a slow warning later when overlays are removed. This patch fixes this by changing the allowed behaviour. If a region has received an overlay that programmed the FPGA, reject other overlays that try to program the FPGA. To reprogram the FPGA, first remove the overlay. This makes sense as removing the overlay also removes the devices cleanly. Note that overlays that make DT changes without reprogramming the FPGA are exempt from this restriction. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: check for child regions before allocing image infoAlan Tull2017-11-281-5/+9
| | | | | | | | | | | | | | | During a device tree overlay pre-apply notification, the check for child FPGA regions can happen slightly earlier. This saves us from allocating the FPGA image info that just gets thrown away. This is a baby step in refactoring the FPGA region code to separate out common FPGA region code from FPGA region Device Tree overlay support. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: get mgr early onAlan Tull2017-11-281-22/+23
| | | | | | | | | | | | Get the FPGA manager during region creation. This is a baby step in refactoring the FPGA region code to separate out common FPGA region code from FPGA region Device Tree overlay support. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: remove unneeded of_node_get and putAlan Tull2017-11-281-3/+0
| | | | | | | | | | | Remove of_node_get/put in fpga_region_get/put. Not needed and will get in the way when I separate out the common FPGA region code from Device Tree support code. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: use dev_err instead of pr_errAlan Tull2017-11-281-10/+10
| | | | | | | | | | | Use dev_err messages instead of pr_err. Also s/&region->dev/dev/ in two places where we already have dev = &region->dev. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: mgr: separate getting/locking FPGA managerAlan Tull2017-11-281-2/+12
| | | | | | | | | | | | | | | | | | | | | Previously when the user gets a FPGA manager, it was locked and nobody else could use it for programming. This commit makes it straightforward to save a reference to an FPGA manager and only lock it when programming the FPGA. Add functions that get an FPGA manager's mutex for exclusive use: * fpga_mgr_lock * fpga_mgr_unlock The following functions no longer lock an FPGA manager's mutex: * of_fpga_mgr_get * fpga_mgr_get * fpga_mgr_put Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: mgr: API change to replace fpga load functions with single functionAlan Tull2017-11-281-15/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fpga-mgr has three methods for programming FPGAs, depending on whether the image is in a scatter gather list, a contiguous buffer, or a firmware file. This makes it difficult to write upper layers as the caller has to assume whether the FPGA image is in a sg table, as a single buffer, or a firmware file. This commit moves these parameters to struct fpga_image_info and adds a single function for programming fpgas. New functions: * fpga_mgr_load - given fpga manager and struct fpga_image_info, program the fpga. * fpga_image_info_alloc - alloc a struct fpga_image_info. * fpga_image_info_free - free a struct fpga_image_info. These three functions are unexported: * fpga_mgr_buf_load_sg * fpga_mgr_buf_load * fpga_mgr_firmware_load Also use devm_kstrdup to copy firmware_name so we aren't making assumptions about where it comes from when allocing/freeing the struct fpga_image_info. API documentation has been updated and a new document for FPGA region has been added. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: bridge: support getting bridge from deviceAlan Tull2017-11-281-4/+7
| | | | | | | | | | | | | | | | | | | | | | Add two functions for getting the FPGA bridge from the device rather than device tree node. This is to enable writing code that will support using FPGA bridges without device tree. Rename one old function to make it clear that it is device tree-ish. This leaves us with 3 functions for getting a bridge: * fpga_bridge_get Get the bridge given the device. * fpga_bridges_get_to_list Given the device, get the bridge and add it to a list. * of_fpga_bridges_get_to_list Renamed from priviously existing fpga_bridges_get_to_list. Given the device node, get the bridge and add it to a list. Signed-off-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: Convert to using %pOF instead of full_nameRob Herring2017-08-101-2/+2
| | | | | | | | | | | | | | Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Alan Tull <atull@kernel.org> Cc: Moritz Fischer <moritz.fischer@ettus.com> Cc: linux-fpga@vger.kernel.org Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Alan Tull <atull@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: release FPGA region reference in error pathTobias Klauser2017-04-261-1/+3
| | | | | | | | | | | | | If fpga_region_get_manager() fails in fpga_region_program_fpga(), a reference to the fpga_manager instance previously acquired through fpga_region_get() is retained. Make sure to properly release it in the error case by using a separate jump label which will call fpga_region_put() in before returning. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Alan Tull <atull@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: add config complete timeoutAlan Tull2017-04-081-0/+3
| | | | | | | | Adding timeout for maximum allowed time for FPGA to go to operating mode after a FPGA region has been programmed. Signed-off-by: Alan Tull <atull@opensource.altera.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: region: Add fpga-region property 'encrypted-fpga-config'Moritz Fischer2017-03-171-2/+6
| | | | | | | | | | Add fpga-region property to allow passing the fact that the bitstream is encrypted to the fpga-region and ultimately to the low-level driver. Signed-off-by: Moritz Fischer <mdf@kernel.org> Acked-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Alan Tull <atull@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: fpga-region: device tree control for FPGAAlan Tull2016-11-101-0/+603
FPGA Regions support programming FPGA under control of the Device Tree. Signed-off-by: Alan Tull <atull@opensource.altera.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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