pvr_mmu_backing_page_init(9)

✨ pvr_mmu_backing_page_init(9) ✨

okay so bestie, welcome to the pvr_mmu_backing_page_init(9) page from the Kernel API Manual — yes, that one. This is the lowkey iconic setup routine for one MMU backing page, and we're gonna read it together like a group chat. 💖

---

🌸 NAME 🌸

pvr_mmu_backing_page_init — Initialize a MMU backing page.

---

✨ SYNOPSIS ✨

int pvr_mmu_backing_page_init (struct pvr_mmu_backing_page *page ,
struct pvr_device *pvr_dev );

---

🎀 ARGUMENTS 🎀

• page — Target backing page. that's your page, bestie
• pvr_dev — Target PowerVR device. the PowerVR device in question

---

🦋 DESCRIPTION 🦋

okay so this function performs three distinct operations, and yes we're listing them because bestie deserves the full tea:

1. Allocate a single page,
2. Map the page to the CPU, and
3. Map the page to DMA-space.

It is expected that page be zeroed (e.g. from kzalloc) before calling this function. like, do that first, no cap.

---

💅 RETURN 💅

• 0 on success, or
• -ENOMEM if allocation of the backing page or mapping of the backing page to DMA fails.

that's the whole vibe check, periodt. ✨

---

🌈 SEE ALSO 🌈

okay bestie, this is the part where the manpage says “go read these too” and honestly it's giving extended universe. Every single one:

• Kernel file ./drivers/gpu/drm/imagination/pvr_mmu.c
• pvr_mmu_set_flush_flags(9)
• pvr_mmu_flush_request_all(9)
• pvr_mmu_flush_exec(9)
• PowerVR Virtual Memory Handling(9)
• PowerVR Virtual Memory Handling (constants)(9)
• MMU backing pages(9)
• MMU backing pages (constants)(9)
• struct pvr_mmu_backing_page(9)
• pvr_mmu_backing_page_fini(9)
• pvr_mmu_backing_page_sync(9)
• Raw page tables(9)
• struct pvr_page_table_l2_entry_raw(9)
• pvr_page_table_l2_entry_raw_set(9)
• struct pvr_page_table_l1_entry_raw(9)
• pvr_page_table_l1_entry_raw_set(9)
• struct pvr_page_table_l0_entry_raw(9)
• struct pvr_page_flags_raw(9)
• pvr_page_table_l0_entry_raw_set(9)
• pvr_page_flags_raw_create(9)
• struct pvr_page_table_l2_raw(9)
• struct pvr_page_table_l1_raw(9)
• struct pvr_page_table_l0_raw(9)
• Mirror page tables(9)
• struct pvr_page_table_l2(9)
• pvr_page_table_l2_init(9)
• pvr_page_table_l2_fini(9)
• pvr_page_table_l2_sync(9)
• pvr_page_table_l2_get_raw(9)
• pvr_page_table_l2_get_entry_raw(9)
• pvr_page_table_l2_entry_is_valid(9)
• struct pvr_page_table_l1(9)
• pvr_page_table_l1_init(9)
• pvr_page_table_l1_free(9)
• pvr_page_table_l1_sync(9)
• pvr_page_table_l1_get_raw(9)
• pvr_page_table_l1_get_entry_raw(9)
• pvr_page_table_l1_entry_is_valid(9)
• struct pvr_page_table_l0(9)
• pvr_page_table_l0_init(9)
• pvr_page_table_l0_free(9)
• pvr_page_table_l0_sync(9)
• pvr_page_table_l0_get_raw(9)
• pvr_page_table_l0_get_entry_raw(9)
• pvr_page_table_l0_entry_is_valid(9)
• struct pvr_mmu_context(9)
• struct pvr_page_table_ptr(9)
• struct pvr_mmu_op_context(9)
• pvr_page_table_l2_insert(9)
• pvr_page_table_l2_remove(9)
• pvr_page_table_l1_insert(9)
• pvr_page_table_l1_remove(9)
• pvr_page_table_l0_insert(9)
• pvr_page_table_l0_remove(9)
• Page table index utilities(9)
• pvr_page_table_l2_idx(9)
• pvr_page_table_l1_idx(9)
• pvr_page_table_l0_idx(9)
• High-level page table operations(9)
• pvr_page_table_l1_get_or_insert(9)
• pvr_page_table_l0_get_or_insert(9)
• pvr_mmu_context_create(9)
• pvr_mmu_context_destroy(9)
• pvr_mmu_get_root_table_dma_addr(9)
• pvr_page_table_l1_alloc(9)
• pvr_page_table_l0_alloc(9)
• pvr_mmu_op_context_require_sync(9)
• pvr_mmu_op_context_sync_manual(9)
• pvr_mmu_op_context_sync_partial(9)
• pvr_mmu_op_context_sync(9)
• pvr_mmu_op_context_load_tables(9)
• pvr_mmu_op_context_set_curr_page(9)
• pvr_mmu_op_context_next_page(9)
• Single page operations(9)
• pvr_page_create(9)
• pvr_page_destroy(9)
• pvr_mmu_op_context_destroy(9)
• pvr_mmu_op_context_create(9)
• pvr_mmu_op_context_unmap_curr_page(9)
• pvr_mmu_unmap(9)
• pvr_mmu_map_sgl(9)
• pvr_mmu_map(9)

---

and that's the page, bestie 🫶. This one lives in the source tree at ./drivers/gpu/drm/imagination, with the date/version situation being October 2026, and the manual page name is pvr_mmu_backing_page_init(9). slay ✨