DRM_GEM_DMA_DRIVER_OPS_VMAP(9)

💅 DRM_GEM_DMA_DRIVER_OPS_VMAP(9) — like, the Kernel API Manual page, bestie 🎀

Okay so this is a page straight out of the Kernel API Manual, and the star of the show is DRM_GEM_DMA_DRIVER_OPS_VMAP — the whole thing lives in ./include/drm/drm_gem_dma_helper.h and it's lowkey one of those macros you're gonna be obsessed with once it clicks. Buckle up, we're going in ✨

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🌸 NAME 🌸

DRM_GEM_DMA_DRIVER_OPS_VMAP — DMA GEM driver operations that make sure you've got a virtual address on the buffer. That's the whole vibe, no cap 💫

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🦋 SYNOPSIS 🦋

DRM_GEM_DMA_DRIVER_OPS_VMAP

Just the macro name, standing there, being iconic, taking zero arguments 👑

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💖 DESCRIPTION 💖

So here's the tea 🍵 — this macro is literally a shortcut for setting the default GEM operations in the drm_driver structure. It's for drivers that need the virtual address also on imported buffers. Like, not just the ones you made yourself, the imported ones too. Main character energy for your buffers fr fr.

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Heads up bestie — if your driver comes with its own implementation of struct drm_driver.dumb_create, this is not the macro for you. You want DRM_GEM_DMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE instead 🙈

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The rule of thumb, and I'm saying this with my whole chest:

• Use DRM_GEM_DMA_DRIVER_OPS_VMAP if possible — it's the default choice, the moment, the one 💅
• Driver rolls its own struct drm_driver.dumb_create? → DRM_GEM_DMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE 🫶
• Don't need a virtual address on imported buffers? → DRM_GEM_DMA_DRIVER_OPS instead, easy ✨

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🔥 SEE ALSO 🔥

Go read these next, they're all linked from the Kernel file ./include/drm/drm_gem_dma_helper.h and they're honestly a whole mood:

• struct drm_gem_dma_object(9)
• drm_gem_dma_object_free(9)
• drm_gem_dma_object_print_info(9)
• drm_gem_dma_object_get_sg_table(9)
• drm_gem_dma_object_mmap(9)
• DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(9)
• DRM_GEM_DMA_DRIVER_OPS(9)
• DRM_GEM_DMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE(9)
• DEFINE_DRM_GEM_DMA_FOPS(9)

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🧚 cute lil sign-off 🧚

That's the whole page, bestie — brought to you from ./include/drm, dated October 2026, and it's filed under DRM_GEM_DMA_DRIVER_OPS_VMAP(9) in the Kernel API Manual. Now go forth and set those default GEM operations 💜🌈⭐