pci_epc_mem_init(9)

✨ pci_epc_mem_init(9) ✨

okay so bestie, welcome to the Kernel API Manual page for pci_epc_mem_init 💅 this one's short and sweet, so we can absolutely get you fluent in like two minutes. no cap.

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🌸 NAME 🌸

pci_epc_mem_init — literally "Initialize the pci_epc_mem structure" 🎀 that's the whole vibe check, she sets up a pci_epc_mem struct and she does it well.

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🦋 SYNOPSIS 🦋

int pci_epc_mem_init (struct pci_epc *epc , phys_addr_t base , size_t
size , size_t page_size );

she returns an int, bestie — take note 📝

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💖 ARGUMENTS 💖

• epc — the EPC device that invoked pci_epc_mem_init 🫶 like, the one who called her first. main character energy fr.
• base — Physical address of the window region ✨ the starting point, the origin story.
• size — Total Size of the window region 👑 the whole thing, not a fraction, the total.
• page_size — Page size of the window region 🎀 every window region has a page size and this is hers.

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🧚 DESCRIPTION 🧚

so the move here: invoke pci_epc_mem_init to initialize a single pci_epc_mem structure 💫 and what's that structure for, you ask? it's the one used by the endpoint functions to allocate memory for mapping the PCI host memory 😭🔥 like, that's literally her job. one structure, properly initialized, endpoint functions do their little allocations, host memory gets mapped. slay.

key word is single — if you've got multiple of these bad boys to set up, go look at pci_epc_multi_mem_init(9) down in SEE ALSO, iykyk 👀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/pci/endpoint/pci-epc-mem.c — the source, the mothership, go read her 📖
• pci_epc_mem_get_order(9)
• pci_epc_multi_mem_init(9)
• pci_epc_mem_exit(9)
• pci_epc_mem_alloc_addr(9)
• pci_epc_mem_free_addr(9)

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💀 friendly reminder that this is kernel-space, bestie — the int return is not decorative, check it. 🙈

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and that's the page!! brought to you from ./drivers/pci/endpoint, dated October 2026, under the Kernel API Manual 🌸 go forth and initialize your structures, queen 👑💜