ocxl_function_open(9)

✨ ocxl_function_open(9) ✨

okay so this is a page from the Kernel API Manual, bestie — we're talking OpenCAPI today and it's honestly giving big "let me introduce you to my favorite function" energy 🫶

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💖 NAME 💖

ocxl_function_open — opens an OpenCAPI function on an OpenCAPI device 🔥 that's literally the whole job, no cap.

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🌸 SYNOPSIS 🌸

struct ocxl_fn * ocxl_function_open (struct pci_dev *dev );

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🎀 ARGUMENTS 🎀

• dev — the PCI device that contains the function 💅 like, the actual device you want the function off of, not a lookalike, not a cousin. that one.

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🦋 DESCRIPTION 🦋

so this one returns an opaque pointer to the function ✨ or — plot twist — an error pointer, which you gotta check with IS_ERR 😭 yes bestie, check it, do not just vibe with whatever comes back, that pointer could be a whole red flag 🚩

that's it, that's the description, it's short but she ate 👑

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🌈 SEE ALSO 🌈

• Kernel file ./include/misc/ocxl.h 📁
• ocxl_function_afu_list(9)
• ocxl_function_fetch_afu(9)
• ocxl_afu_get(9)
• ocxl_afu_put(9)
• ocxl_function_config(9)
• ocxl_function_close(9)
• ocxl_context_alloc(9)
• ocxl_context_free(9)
• ocxl_context_attach(9)
• ocxl_context_detach(9)
• ocxl_afu_irq_alloc(9)
• ocxl_afu_irq_free(9)
• ocxl_afu_irq_get_addr(9)
• ocxl_irq_set_handler(9)
• ocxl_afu_config(9)
• ocxl_afu_set_private(9)
• ocxl_afu_get_private(9)
• ocxl_global_mmio_read32(9)
• ocxl_global_mmio_read64(9)
• ocxl_global_mmio_write32(9)
• ocxl_global_mmio_write64(9)
• ocxl_global_mmio_set32(9)
• ocxl_global_mmio_set64(9)
• ocxl_global_mmio_clear32(9)
• ocxl_global_mmio_clear64(9)

that is a lot of friends, and honestly? iconic of her to have this many. go read them too, iykyk 💜

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mwah 💋 this page lives in ./include/misc and it's stamped October 2026 — so go forth and open those functions, bestie, and remember: IS_ERR before you commit 🧚‍♀️💖