kernel/linux.git/drivers/fpga, branch v6.18.21

fpga: dfl: use subsys_initcall to allow built-in drivers to be added

2026-03-04T12:20:54+00:00

[ Upstream commit 267f53140c9d0bf270bbe0148082e9b8e5011273 ] The dfl code adds a bus. If it is built-in and there is a built-in driver as well, the dfl module_init may be called after the driver module_init, leading to a failure to register the driver as the bus has not been added yet. Use subsys_initcall, which guarantees it will be called before the drivers init code. Without the fix, we see failures like this: [ 0.479475] Driver 'intel-m10-bmc' was unable to register with bus_type 'dfl' because the bus was not initialized. Cc: stable@vger.kernel.org Fixes: 9ba3a0aa09fe ("fpga: dfl: create a dfl bus type to support DFL devices") Signed-off-by: Thadeu Lima de Souza Cascardo Link: https://lore.kernel.org/r/20251215-dfl_subsys-v1-1-21807bad6b10@igalia.com Reviewed-by: Xu Yilun Signed-off-by: Xu Yilun Signed-off-by: Sasha Levin

fpga: of-fpga-region: Fail if any bridge is missing

2026-03-04T12:20:32+00:00

[ Upstream commit c141c8221bc5089de915d9f26044df892c343c7e ] When parsing the region bridge list from the "fpga-bridges" device tree property, the of-fpga-region driver will silently ignore bridges which fail to be obtained, for example due to a missing bridge driver or invalid phandle. This can lead to hardware issues if a region bridge stays coupled when partial programming is performed. Fail if any of the bridges specified in "fpga-bridges" cannot be obtained. Signed-off-by: Romain Gantois Link: https://lore.kernel.org/r/20251127-of-fpga-region-fail-if-bridges-not-found-v1-1-ca674f8d07eb@bootlin.com Reviewed-by: Xu Yilun Signed-off-by: Xu Yilun Signed-off-by: Sasha Levin

fpga: zynq_fpga: Fix the wrong usage of dma_map_sgtable()

2025-08-19T10:54:45+00:00

dma_map_sgtable() returns only 0 or the error code. Read sgt->nents to get the number of mapped segments. Fixes: 37e00703228a ("zynq_fpga: use sgtable-based scatterlist wrappers") Reported-by: Pavel Pisa Closes: https://lore.kernel.org/linux-fpga/202508041548.22955.pisa@fel.cvut.cz/ Reviewed-by: Jason Gunthorpe Reviewed-by: Marek Szyprowski Signed-off-by: Xu Yilun Tested-by: Pavel Pisa Link: https://lore.kernel.org/r/20250806070605.1920909-2-yilun.xu@linux.intel.com Signed-off-by: Greg Kroah-Hartman

zynq_fpga: use sgtable-based scatterlist wrappers

2025-06-18T02:36:55+00:00

Use common wrappers operating directly on the struct sg_table objects to fix incorrect use of statterlists related calls. dma_unmap_sg() function has to be called with the number of elements originally passed to the dma_map_sg() function, not the one returned in sgtable's nents. CC: stable@vger.kernel.org Fixes: 425902f5c8e3 ("fpga zynq: Use the scatterlist interface") Signed-off-by: Marek Szyprowski Reviewed-by: Jason Gunthorpe Reviewed-by: Xu Yilun Link: https://lore.kernel.org/r/20250616120932.1090614-1-m.szyprowski@samsung.com Signed-off-by: Xu Yilun

Merge tag 'fpga-for-6.16-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/fpga/linux-fpga into char-misc-next

2025-05-21T12:08:44+00:00

Xu writes: FPGA Manager changes for 6.16-rc1 - Peter hands over the maintain role of m10bmc-sec driver to Matthew. - Qasim's change fix potential NULL pointer for fpga test. All patches have been reviewed on the mailing list, and have been in the last linux-next releases (as part of our for-next branch). Signed-off-by: Xu Yilun * tag 'fpga-for-6.16-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/fpga/linux-fpga: fpga: fix potential null pointer deref in fpga_mgr_test_img_load_sgt() fpga: m10bmc-sec: change contact for secure update driver

fpga: fix potential null pointer deref in fpga_mgr_test_img_load_sgt()

2025-05-05T16:37:00+00:00

fpga_mgr_test_img_load_sgt() allocates memory for sgt using kunit_kzalloc() however it does not check if the allocation failed. It then passes sgt to sg_alloc_table(), which passes it to __sg_alloc_table(). This function calls memset() on sgt in an attempt to zero it out. If the allocation fails then sgt will be NULL and the memset will trigger a NULL pointer dereference. Fix this by checking the allocation with KUNIT_ASSERT_NOT_ERR_OR_NULL(). Reviewed-by: Marco Pagani Fixes: ccbc1c302115 ("fpga: add an initial KUnit suite for the FPGA Manager") Signed-off-by: Qasim Ijaz Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20250422153737.5264-1-qasdev00@gmail.com Signed-off-by: Xu Yilun

fpga: tests: add module descriptions

2025-04-12T00:32:38+00:00

Modules without a description now cause a warning: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fpga/tests/fpga-bridge-test.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fpga/tests/fpga-mgr-test.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fpga/tests/fpga-region-test.o Link: https://lkml.kernel.org/r/20250324173242.1501003-4-arnd@kernel.org Fixes: 6c6c1fc09de3 ("modpost: require a MODULE_DESCRIPTION()") Signed-off-by: Arnd Bergmann Cc: Hao Wu Cc: Jeff Johnson Cc: Marco Pagani Cc: Masahiro Yamada Cc: Moritz Fischer Cc: Russ Weight Cc: Stehen Rothwell Cc: Tom Rix Cc: Xu Yilun Signed-off-by: Andrew Morton

fpga: versal: remove incorrect of_match_ptr annotation

2025-03-01T09:37:31+00:00

Building with W=1 shows a warning about versal_fpga_of_match being unused when CONFIG_OF is disabled: drivers/fpga/versal-fpga.c:62:34: error: unused variable 'versal_fpga_of_match' [-Werror,-Wunused-const-variable] Acked-by: Xu Yilun Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20250225163510.4168911-1-arnd@kernel.org Signed-off-by: Xu Yilun

fpga: altera-cvp: Increase credit timeout

2025-03-01T09:36:58+00:00

Increase the timeout for SDM (Secure device manager) data credits from 20ms to 40ms. Internal stress tests running at 500 loops failed with the current timeout of 20ms. At the start of a FPGA configuration, the CVP host driver reads the transmit credits from SDM. It then sends bitstream FPGA data to SDM based on the total credits. Each credit allows the CVP host driver to send 4kBytes of data. There are situations whereby, the SDM did not respond in time during testing. Signed-off-by: Ang Tien Sung Signed-off-by: Kuhanh Murugasen Krishnan Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20250212221249.2715929-1-tien.sung.ang@intel.com Signed-off-by: Xu Yilun

Merge tag 'fpga-for-6.14-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/fpga/linux-fpga into char-misc-next

2025-01-09T09:56:57+00:00

Xu writes: FPGA Manager changes for 6.14-rc1 - Peter's change fixes SRIOV problems for Intel DFL device. All patches have been reviewed on the mailing list, and have been in the last linux-next releases (as part of our for-next branch). Signed-off-by: Xu Yilun * tag 'fpga-for-6.14-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/fpga/linux-fpga: fpga: dfl: destroy/recreate feature platform device on port release/assign fpga: dfl: drop unneeded get_device() and put_device() of feature device fpga: dfl: remove unneeded function build_info_create_dev() fpga: dfl: allocate platform device after feature device data fpga: dfl: store platform device id in feature device data fpga: dfl: store platform device name in feature device data fpga: dfl: store MMIO resources in feature device data fpga: dfl: convert features from flexible array member to separate array fpga: dfl: factor out feature device data from platform device data fpga: dfl: factor out feature device registration fpga: dfl: refactor internal DFL APIs to take/return feature device data fpga: dfl: store FIU type in feature platform data fpga: dfl: factor out feature data creation from build_info_commit_dev() fpga: dfl: pass feature platform data instead of device as argument fpga: dfl: afu: define local pointer to feature device fpga: dfl: afu: use parent device to log errors on port enable/disable fpga: dfl: return platform data from dfl_fpga_inode_to_feature_dev_data() fpga: dfl: omit unneeded argument pdata from dfl_feature_instance_init()