STRUCT HL_DMABUF_PRIV(9)

🎀 NAME 🎀

okay so welcome to the struct hl_dmabuf_priv(9) page, straight out of the Kernel API Manual — this is genuinely just a little struct that acts as the private object for a dma-buf. private bestie energy, yk? 💅

✨ SYNOPSIS ✨

struct hl_dmabuf_priv {
    struct dma_buf                  *dmabuf;
    struct hl_ctx                   *ctx;
    struct hl_vm_phys_pg_pack       *phys_pg_pack;
    struct hl_vm_hash_node          *memhash_hnode;
    u64 offset;
    u64 device_phys_addr;
 };

bestie do NOT retype this from memory, it's copy-paste coded (and yes, there's an extra space before that last }; in the original, leave it, it's iconic 🙈)

🫶 MEMBERS 🫶

• dmabuf — pointer to the dma-buf object. like, the whole point, the main character 👑
• ctx — pointer to the dma-buf owner's context. whoever exported this thing.
• phys_pg_pack — pointer to the physical page pack, but ONLY if the dma-buf was exported where virtual memory is supported. no vmem, no pack, no problem.
• memhash_hnode — pointer to the memhash node. this one is lowkey the bouncer at the club: this object holds the export count. 🔥
• offset — the offset into the buffer from which the memory is exported. relevant only if virtual memory is supported AND phys_pg_pack is being used. fr fr, conditional queen.
• device_phys_addr — physical address of the device's memory. relevant only if phys_pg_pack is NULL (i.e. the dma-buf was exported from address). and if you need the total size? take it from the dmabuf object, it's right there 💖

👑 SEE ALSO 👑

Kernel file ./drivers/accel/habanalabs/common/habanalabs.h, enum hl_mmu_page_table_location(9), struct iterate_module_ctx(9), struct hl_gen_wait_properties(9), struct pgt_info(9), enum hl_pci_match_mode(9), enum hl_fw_component(9), enum hl_fw_types(9), enum hl_queue_type(9), struct hw_queue_properties(9), enum vm_type(9), enum mmu_op_flags(9), enum hl_device_hw_state(9), struct hl_mmu_properties(9), struct hl_hints_range(9), struct asic_fixed_properties(9), struct hl_fence(9), struct hl_cs_compl(9), struct hl_ts_buff(9), struct hl_mem_mgr(9), struct hl_mem_mgr_fini_stats(9), struct hl_mmap_mem_buf_behavior(9), struct hl_mmap_mem_buf(9), struct hl_cb(9), struct hl_sync_stream_properties(9), struct hl_encaps_signals_mgr(9), struct hl_hw_queue(9), struct hl_cq(9), struct hl_ts_free_jobs(9), struct hl_user_interrupt(9), struct timestamp_reg_free_node(9), struct hl_user_pending_interrupt(9), struct hl_eq(9), struct hl_dec(9), enum hl_asic_type(9), enum hl_pm_mng_profile(9), enum hl_pll_frequency(9), struct pci_mem_region(9), struct static_fw_load_mgr(9), struct fw_response(9), struct dynamic_fw_load_mgr(9), struct pre_fw_load_props(9), struct fw_image_props(9), struct fw_load_mgr(9), struct engines_data(9), struct hl_asic_funcs(9), enum hl_va_range_type(9), struct hl_va_range(9), struct hl_cs_counters_atomic(9), struct hl_cs_outcome(9), struct hl_cs_outcome_store(9), struct hl_ctx(9), struct hl_ctx_mgr(9), struct hl_userptr(9), struct hl_cs(9), struct hl_cs_job(9), struct hl_cs_parser(9), struct hl_vm_hash_node(9), struct hl_vm_hw_block_list_node(9), struct hl_vm_phys_pg_pack(9), struct hl_vm_va_block(9), struct hl_vm(9), struct hl_debug_params(9), struct hl_notifier_event(9), struct hl_fpriv(9), struct hl_info_list(9), struct hl_debugfs_entry(9), struct hl_dbg_device_entry(9), struct hl_debugfs_cfg_access_entry(9), struct hl_debugfs_cfg_access(9), struct hl_hw_obj_name_entry(9), struct hl_mon_state_dump(9), struct hl_sync_to_engine_map_entry(9), struct hl_sync_to_engine_map(9), struct hl_state_dump_specs_funcs(9), struct hl_state_dump_specs(9), struct hl_device_reset_work(9), struct hl_mmu_priv(9), struct hl_mmu_per_hop_info(9), struct hl_mmu_hop_info(9), struct hl_hr_mmu_funcs(9), struct hl_mmu_funcs(9), struct hl_prefetch_work(9), struct multi_cs_completion(9), struct multi_cs_data(9), struct hl_clk_throttle_timestamp(9), struct hl_clk_throttle(9), struct user_mapped_block(9), struct cs_timeout_info(9), struct undefined_opcode_info(9), struct page_fault_info(9), struct razwi_info(9), struct hw_err_info(9), struct fw_err_info(9), struct engine_err_info(9), struct hl_error_info(9), struct hl_reset_info(9), struct eq_heartbeat_debug_info(9), struct hl_device(9), struct hl_cs_encaps_sig_handle(9), struct hl_info_fw_err_info(9), hl_ioctl_t(9), struct hl_ioctl_desc(9), hl_get_sg_info(9), hl_mem_area_inside_range(9), hl_mem_area_crosses_range(9).

like yes that's a LOT of cross-refs, but they're all here, not one skipped, we don't gatekeep on this page 🦋

and that's the whole vibe check 💜 this masterpiece lives in ./drivers/accel/habanalabs/common, and the page itself is dated October 2026 — go forth and dma-buf responsibly, bestie, mwah 🎀✨