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On Agilex5 the DDR base address starts at 0x8000_0000, which is outside the addressable range of the SDM. The SMMU is used to remap DDR-allocated buffers to an IOVA within the SDM-accessible 0-512MB window. Agilex5 REV B introduced a hardware SDM address remapper, but it must be bypassed so no additional offset is applied to the IOVA, keeping the implementation consistent across all Agilex5 revisions. Patch 1 adds the fpga-mgr child node and fpga-region to the Agilex5 DTSI. The SMMU is already enabled upstream. Patch 2 reports unmatched frees in stratix10_svc_free_memory() with dev_warn() and cleans up related coding style in svc_pa_to_va(). The list-head corruption from list_del(&svc_data_mem) was already fixed by commit 9119ceb76e98 ("firmware: stratix10-svc: fix memory leaks and list corruption bugs"). Patch 3 adds all data-structure fields, macros, includes, helper function, and allocation/free paths required for the DMA coherent mode. This covers both the foundational types (dma_addr, use_dma_mem, dma_addr_offset, SVC_SDM_DMA_ADDR_BITS/OFFSET) and the functional DMA allocation/free code, keeping the structural and functional changes together so each intermediate commit is bisect-safe. Patch 4 adds INTEL_SIP_SMC_SDM_REMAPPER_CONFIG and integrates the Agilex5 path into probe: enforces SMMU presence for intel,agilex5-svc, issues the remapper-bypass SMC, selects the DMA path via stratix10_svc_pdata.use_dma_mem, initialises the controller fields, registers a devm cleanup action for leaked buffers, and guards the error path against a NULL genpool. --- changelog: v2 -> v3: - Squash former patch 2 (SMC remapper defines) into the probe enablement patch so the defines land with their first usage. - Rebase on socfpga_firmware_for_v7.4. - Drop SMMU status="disabled" removal from the DTS patch (already upstream in 10cf797f3f8a). - Drop the list_del(&svc_data_mem) fix already present in 9119ceb76e98; keep the unmatched-free warning and style cleanup. - Adapt of_device_id.data usage to extend stratix10_svc_pdata (shared with needs_psci_cpu_off) instead of casting BIT flags into .data. - Keep kzalloc_obj()/kfree() lifetime for pmem on both gen_pool and DMA paths after 9119ceb76e98. v1 -> v2: - split original patch into smaller patches for easier review and backporting. - Fixed the Fixes: tag in patch 3 referencing 5a0793ac66ac - Replaced of_device_is_compatible() with of_device_id.data + of_device_get_match_data() - Various commit message improvements --- Adrian Ng Ho Yin (4): arm64: dts: socfpga: agilex5: add FPGA manager and region nodes firmware: stratix10-svc: warn on unmatched free in stratix10_svc_free_memory firmware: stratix10-svc: add DMA coherent memory allocation for SMMU-enabled platforms firmware: stratix10-svc: enable Agilex5 SMMU support in probe .../arm64/boot/dts/intel/socfpga_agilex5.dtsi | 11 + drivers/firmware/stratix10-svc.c | 250 +++++++++++++++++--- include/linux/firmware/intel/stratix10-smc.h | 23 ++ 3 files changed, 239 insertions(+), 45 deletions(-) -- 2.49.GIT