STRUCT DRM_PAGEMAP(9)

✨ struct drm_pagemap(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 this is the page for struct drm_pagemap, and it's literally extra info that rides along with a struct dev_pagemap — specifically the whole device p2p handshaking situation 🤝 no cap, that's the entire vibe.

🎀 SYNOPSIS 🎀

struct drm_pagemap {
    const struct drm_pagemap_ops *ops;
    struct kref ref;
    struct drm_device *drm;
    struct dev_pagemap *pagemap;
    struct drm_pagemap_dev_hold *dev_hold;
    struct drm_pagemap_cache *cache;
    struct list_head shrink_link;
 };

like, that's the whole struct, and yes every field matters, so let's get into it 👇

🌸 Members 🌸

• ops — the struct drm_pagemap_ops. that's it, that's the field 💫
• ref — the reference count. classic struct kref behaviour, keep it alive bestie 🫶
• drm — the struct drm device that owns the device-private memory 👑
• pagemap — a pointer to the underlying dev_pagemap. the real one underneath all the extra ✨
• dev_hold — a pointer to a struct drm_pagemap_dev_hold, and it's there for device referencing 📎
• cache — a back-pointer to the struct drm_pagemap_cache that's used for this struct drm_pagemap. heads up: it may be NULL if no cache is used 🙈
• shrink_link — a link into the shrinker's list of drm_pagemaps. important caveat: it's only used if you're also using a pagemap cache, so if you got no cache, this link is just sitting there 💀

🦋 SEE ALSO 🦋

the kernel file ./include/drm/drm_pagemap.h enum, plus this whole squad of cross-references — go read them, they're iconic:

• drm_interconnect_protocol(9)
• struct drm_pagemap_addr(9)
• drm_pagemap_addr_encode(9)
• struct drm_pagemap_ops(9)
• struct drm_pagemap_devmem_ops(9)
• drm_pagemap_get(9)
• drm_pagemap_get_unless_zero(9)
• struct drm_pagemap_devmem(9)
• struct drm_pagemap_migrate_details(9)
• drm_pagemap_page_zone_device_data(9)

and that's the page, bestie 🍓 this one lives in ./include/drm and it's dated October 2026 — mwah, slay, go read the source, periodt 💖🧚