isp_kernel_buffer_alloc(9)

💖 NAME 💖

isp_kernel_buffer_alloc — create kernel buffer object (BO) for isp ✨

okay bestie, welcome to the Kernel API Manual corner: this one is all about making a kernel BO for isp 🎀

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✨ SYNOPSIS ✨

int isp_kernel_buffer_alloc (struct device *dev , u64 size , void
       **buf_obj , u64 *gpu_addr , void **cpu_addr );

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🎀 ARGUMENTS 🎀

• dev — isp device handle 👑
• size — size for the new BO 📏
• buf_obj — GPU BO handle to initialize 🫶
• gpu_addr — GPU addr of the pinned BO 🌸
• cpu_addr — CPU address mapping of BO 🦋

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🦋 DESCRIPTION 🦋

okay so this function allocates and pins a kernel BO for internal isp firmware use — literally the whole vibe 💅

It’s exported on purpose: this function is exported to allow the V4L2 isp device external to drm device to create and access the kernel BO ✨ no cap, that’s the interoperability moment 🫶

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🌸 RETURN 🌸

0 on success 😌💖 negative error code otherwise 😭

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💅 SEE ALSO 💅

Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_isp.c is the main-character file, and the guest list is:

• isp_hw_init(9)
• isp_hw_fini(9)
• isp_user_buffer_alloc(9)
• isp_user_buffer_free(9)
• isp_kernel_buffer_free(9)

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xoxo 💖 this page lives under ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and it’s the isp_kernel_buffer_alloc(9) page — periodt 🌈