create_dmamap_sg_bo(9)

💅 create_dmamap_sg_bo — it's a Kernel API Manual moment, bestie

okay so welcome to the create_dmamap_sg_bo(9) page, a certified kernel-API classic, and honestly? she's lowkey iconic for what she does. let's get into it 🫶

---

✨ NAME ✨

create_dmamap_sg_bo — literally creates a amdgpu_bo object so it can reflect all the info about a USERPTR or DOOREBELL or MMIO BO. that's the whole vibe. no cap.

---

🌸 SYNOPSIS 🌸

int create_dmamap_sg_bo (struct amdgpu_device *adev , struct kgd_mem
*mem , struct amdgpu_bo **bo_out );

like, look at her signature. so clean. so demure. 💅

---

🎀 ARGUMENTS 🎀

• adev — the device for which the dmamap BO is being created. it's giving "who is this for" energy, and the answer is this device 💖
• mem — the BO of the peer device that's getting DMA mapped. she's the main character supplying the parameters used to build the dmamap BO 🌟
• bo_out — the output parameter, updated with the handle of the dmamap BO. yes bestie, she's an out-param, she comes back changed ✨

---

🦋 SEE ALSO 🦋

first up, the kernel file herself, no cap:

./drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c

and then the whole friend group — go say hi, they all ate:

• reuse_dmamap(9)
• amdgpu_amdkfd_reserve_mem_limit(9)
• amdgpu_amdkfd_remove_all_eviction_fences(9)
• create_sg_table(9)
• kfd_mem_dmamap_sg_bo(9)
• kfd_mem_dmaunmap_sg_bo(9)
• reserve_bo_and_vm(9)
• reserve_bo_and_cond_vms(9)
• unreserve_bo_and_vms(9)
• amdgpu_amdkfd_gpuvm_pin_bo(9)
• amdgpu_amdkfd_gpuvm_unpin_bo(9)
• amdgpu_amdkfd_map_gtt_bo_to_gart(9)

---

and that's the page!! 🎀 quick little sign-off for the receipts: this one lives under ./drivers/gpu/drm/amd/amdgpu, it's dated October 2026, and the whole thing is filed under create_dmamap_sg_bo(9). slay, periodt, go read the source 💜🌈