pci_alloc_p2pmem(9)

okay so bestie, this is pci_alloc_p2pmem(9) from the Kernel API Manual — the little page about allocating peer-to-peer DMA memory. It’s giving “one function, one job” energy, and honestly? Obsessed. 💖

✨ NAME ✨

pci_alloc_p2pmem — allocate peer-to-peer DMA memory. periodt. 💅

🫶 SYNOPSIS 🫶

Here’s the signature, copy-paste girlies:

void * pci_alloc_p2pmem (struct pci_dev *pdev , size_t size );

🎀 ARGUMENTS 🎀

• pdev — the device to allocate memory from. Like, that’s the device you’re pulling from, bestie. 🫶
• size — number of bytes to allocate. Yes, bytes. The exact amount you want, fr fr. 🌸

💅 DESCRIPTION 💅

Returns the allocated memory or NULL on error. That’s the whole tea: success = allocated memory, error = NULL. 😭

No extra behavior claimed here, bestie — that’s literally the sentence. 💀

🌈 SEE ALSO 🌈

Home base is the kernel file ./drivers/pci/p2pdma.c. The full squad:

• 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_free_p2pmem(9)
• pci_p2pmem_virt_to_bus(9)
• pci_p2pmem_alloc_sgl(9)
• pci_p2pmem_free_sgl(9)
• pci_p2pmem_publish(9)
• pci_p2pdma_map_type(9)
• pci_p2pdma_enable_store(9)
• pci_p2pdma_enable_show(9)

cute sign-off: source/version ./drivers/pci, date October 2026, and this page is pci_alloc_p2pmem(9). bye bestie 💜🦋🎀