epf_ntb_free_peer_mem(9)

🎀 NAME 🎀

okay bestie, welcome to the epf_ntb_free_peer_mem(9) page from the Kernel API Manual 💖. This function is literally epf_ntb_free_peer_mem — it frees memory allocated in peers outbound address space. no cap, that's the whole name vibe ✨

🌸 SYNOPSIS 🌸

void epf_ntb_free_peer_mem (struct epf_ntb_epc *ntb_epc );

🦋 ARGUMENTS 🦋

• ntb_epc — EPC associated with one of the HOST which holds peers outbound address regions. like, it's the EPC tied to one of the HOSTs holding peers outbound address regions, iykyk 🫶

🌈 DESCRIPTION 🌈

okay so this diagram is a whole lot, but it's the official map, so we're keeping it exactly as it is. do not perceive it too hard, just let the BAR energy wash over you 💅

       ┌─────────────────────────────────────────────────────────────┐
       │ BAR0           Doorbell 1   +-----------> MSI   X ADDRESS 1 │
       │ BAR1           Doorbell 2   +---------+                     │
       └─────────────────────────────────────────────────────────────┘
       |       BAR2      |          |   Doorbell 3   +-------+ |
       +-----------------+ |       BAR3      |    |     |   Doorbell 4
       +-----+ |   +-----------------+ |       BAR4      |    |     |
       |     | |   +-----------------+ |       BAR5      |    |     |
       |   | |     +-----------------+ EP CONTROLLER 1            |
       |   | |     +-----------------+ |                |   | +---->+ MSI|X
       ADDRESS 4 | (A)      EP CONTROLLER 2     |       |                 | (OB
       SPACE)        |       |                 | +------->      MW1        | |
       | |                 | (B)     +-----------------+ |                 | |
       | |                 | |                 | |                 | PCI
       Address Space (Managed by HOST2)

Free memory allocated in EP CONTROLLER 2 (OB SPACE) in the above diagram. It'll free Doorbell 1, Doorbell 2, Doorbell 3, Doorbell 4, MW1 (and MW2, MW3, MW4). that's the cleanup moment, periodt 🧚

👑 SEE ALSO 👑

Kernel file: ./drivers/pci/endpoint/functions/pci-epf-ntb.c — yes, the actual kernel file, go look 👀

also peek at these icons:

• epf_ntb_link_up(9)
• epf_ntb_configure_mw(9)
• epf_ntb_teardown_mw(9)
• epf_ntb_configure_msi(9)
• epf_ntb_configure_msix(9)
• epf_ntb_configure_db(9)
• epf_ntb_teardown_db(9)
• epf_ntb_cmd_handler(9)
• epf_ntb_peer_spad_bar_clear(9)
• epf_ntb_peer_spad_bar_set(9)
• epf_ntb_config_sspad_bar_clear(9)
• epf_ntb_config_sspad_bar_set(9)
• epf_ntb_config_spad_bar_free(9)
• epf_ntb_config_spad_bar_alloc(9)
• epf_ntb_config_spad_bar_alloc_interface(9)
• epf_ntb_db_mw_bar_clear(9)
• epf_ntb_db_mw_bar_cleanup(9)
• epf_ntb_configure_interrupt(9)
• epf_ntb_alloc_peer_mem(9)
• epf_ntb_db_mw_bar_init(9)
• epf_ntb_epc_create_interface(9)
• epf_ntb_epc_create(9)
• epf_ntb_init_epc_bar_interface(9)
• epf_ntb_init_epc_bar(9)
• epf_ntb_epc_init_interface(9)
• epf_ntb_epc_cleanup_interface(9)
• epf_ntb_epc_cleanup(9)
• epf_ntb_epc_init(9)
• epf_ntb_bind(9)
• epf_ntb_unbind(9)
• epf_ntb_add_cfs(9)
• epf_ntb_probe(9)

mwah 💋 this page's source/version is ./drivers/pci/endpoint/functions, and the date on it is October 2026. go be iconic ✨