pci_p2pmem_publish(9)

💖 NAME 💖

okay so bestie, this is the pci_p2pmem_publish(9) page from the Kernel API Manual — and it's literally about publishing the peer-to-peer DMA memory for use by other devices with pci_p2pmem_find() ✨

🦋 SYNOPSIS 🦋

void pci_p2pmem_publish (struct pci_dev *pdev , bool publish );

🎀 ARGUMENTS 🎀

• pdev — the device with peer-to-peer DMA memory to publish
• publish — set to true to publish the memory, false to unpublish it

🌸 DESCRIPTION 🌸

Published memory can be used by other PCI device drivers for peer-2-peer DMA operations. Non-published memory is reserved for exclusive use of the device driver that registers the peer-to-peer memory.

Like… that's the whole vibe: publish it and other PCI device drivers can use it for peer-2-peer DMA 🔥. Don't publish it and it stays reserved for exclusive use by the driver that registered that peer-to-peer memory — periodt 💅

👑 SEE ALSO 👑

Kernel file ./drivers/pci/p2pdma.c is the home base, and the whole friend group is:

• pcim_p2pdma_init(9)
• pcim_p2pdma_provider(9)
• pci_p2pdma_add_resource(9)
• pci_p2pdma_distance_many(9)
• pci_has_p2pmem(9)
• pci_p2pmem_find_many(9)
• pci_alloc_p2pmem(9)
• pci_free_p2pmem(9)
• pci_p2pmem_virt_to_bus(9)
• pci_p2pmem_alloc_sgl(9)
• pci_p2pmem_free_sgl(9)
• pci_p2pdma_map_type(9)
• pci_p2pdma_enable_store(9)
• pci_p2pdma_enable_show(9)

xoxo bestie 💖 source/version: ./drivers/pci • October 2026 • manual: pci_p2pmem_publish(9) 🫶✨