linux/drivers/gpu/drm/i915/display/intel_dpt.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2021 Intel Corporation
 */

#include "gem/i915_gem_domain.h"
#include "gem/i915_gem_internal.h"
#include "gem/i915_gem_lmem.h"
#include "gt/gen8_ppgtt.h"

#include "i915_drv.h"
#include "intel_display_types.h"
#include "intel_dpt.h"
#include "intel_fb.h"

struct i915_dpt { … };

#define i915_is_dpt(vm) …

static inline struct i915_dpt *
i915_vm_to_dpt(struct i915_address_space *vm)
{ … }

#define dpt_total_entries(dpt) …

static void gen8_set_pte(void __iomem *addr, gen8_pte_t pte)
{ … }

static void dpt_insert_page(struct i915_address_space *vm,
			    dma_addr_t addr,
			    u64 offset,
			    unsigned int pat_index,
			    u32 flags)
{ … }

static void dpt_insert_entries(struct i915_address_space *vm,
			       struct i915_vma_resource *vma_res,
			       unsigned int pat_index,
			       u32 flags)
{ … }

static void dpt_clear_range(struct i915_address_space *vm,
			    u64 start, u64 length)
{ … }

static void dpt_bind_vma(struct i915_address_space *vm,
			 struct i915_vm_pt_stash *stash,
			 struct i915_vma_resource *vma_res,
			 unsigned int pat_index,
			 u32 flags)
{ … }

static void dpt_unbind_vma(struct i915_address_space *vm,
			   struct i915_vma_resource *vma_res)
{ … }

static void dpt_cleanup(struct i915_address_space *vm)
{ … }

struct i915_vma *intel_dpt_pin_to_ggtt(struct i915_address_space *vm,
				       unsigned int alignment)
{ … }

void intel_dpt_unpin_from_ggtt(struct i915_address_space *vm)
{ … }

/**
 * intel_dpt_resume - restore the memory mapping for all DPT FBs during system resume
 * @i915: device instance
 *
 * Restore the memory mapping during system resume for all framebuffers which
 * are mapped to HW via a GGTT->DPT page table. The content of these page
 * tables are not stored in the hibernation image during S4 and S3RST->S4
 * transitions, so here we reprogram the PTE entries in those tables.
 *
 * This function must be called after the mappings in GGTT have been restored calling
 * i915_ggtt_resume().
 */
void intel_dpt_resume(struct drm_i915_private *i915)
{ … }

/**
 * intel_dpt_suspend - suspend the memory mapping for all DPT FBs during system suspend
 * @i915: device instance
 *
 * Suspend the memory mapping during system suspend for all framebuffers which
 * are mapped to HW via a GGTT->DPT page table.
 *
 * This function must be called before the mappings in GGTT are suspended calling
 * i915_ggtt_suspend().
 */
void intel_dpt_suspend(struct drm_i915_private *i915)
{ … }

struct i915_address_space *
intel_dpt_create(struct intel_framebuffer *fb)
{ … }

void intel_dpt_destroy(struct i915_address_space *vm)
{ … }

u64 intel_dpt_offset(struct i915_vma *dpt_vma)
{ … }