Separate the VM page table backend operations from the state machine since
the amdgpu_vm.c file is becoming to complex.
The allocating, freeing and updating page tables and page directories can
easily be moved into a separate file.
While at it cleanup everything checkpatch.pl reported and rename the
functions a bit to make more clear that they belong together.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/Makefile | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 953 +--------------------
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 16 +
drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c | 979 ++++++++++++++++++++++
4 files changed, 1006 insertions(+), 944 deletions(-)
create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 5dfe08cb045e..9221cc4520a1 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -49,7 +49,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \
amdgpu_cs.o amdgpu_bios.o amdgpu_benchmark.o \
atombios_dp.o amdgpu_afmt.o amdgpu_trace_points.o \
atombios_encoders.o amdgpu_sa.o atombios_i2c.o \
- amdgpu_dma_buf.o amdgpu_vm.o amdgpu_ib.o amdgpu_pll.o \
+ amdgpu_dma_buf.o amdgpu_vm.o amdgpu_vm_pt.o amdgpu_ib.o amdgpu_pll.o \
amdgpu_ucode.o amdgpu_bo_list.o amdgpu_ctx.o amdgpu_sync.o \
amdgpu_gtt_mgr.o amdgpu_preempt_mgr.o amdgpu_vram_mgr.o amdgpu_virt.o \
amdgpu_atomfirmware.o amdgpu_vf_error.o amdgpu_sched.o \
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index eb9b86466336..accebbac2f29 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -154,108 +154,6 @@ static inline void amdgpu_vm_eviction_unlock(struct amdgpu_vm *vm)
mutex_unlock(&vm->eviction_lock);
}
-/**
- * amdgpu_vm_level_shift - return the addr shift for each level
- *
- * @adev: amdgpu_device pointer
- * @level: VMPT level
- *
- * Returns:
- * The number of bits the pfn needs to be right shifted for a level.
- */
-static unsigned amdgpu_vm_level_shift(struct amdgpu_device *adev,
- unsigned level)
-{
- switch (level) {
- case AMDGPU_VM_PDB2:
- case AMDGPU_VM_PDB1:
- case AMDGPU_VM_PDB0:
- return 9 * (AMDGPU_VM_PDB0 - level) +
- adev->vm_manager.block_size;
- case AMDGPU_VM_PTB:
- return 0;
- default:
- return ~0;
- }
-}
-
-/**
- * amdgpu_vm_num_entries - return the number of entries in a PD/PT
- *
- * @adev: amdgpu_device pointer
- * @level: VMPT level
- *
- * Returns:
- * The number of entries in a page directory or page table.
- */
-static unsigned amdgpu_vm_num_entries(struct amdgpu_device *adev,
- unsigned level)
-{
- unsigned shift = amdgpu_vm_level_shift(adev,
- adev->vm_manager.root_level);
-
- if (level == adev->vm_manager.root_level)
- /* For the root directory */
- return round_up(adev->vm_manager.max_pfn, 1ULL << shift)
- >> shift;
- else if (level != AMDGPU_VM_PTB)
- /* Everything in between */
- return 512;
- else
- /* For the page tables on the leaves */
- return AMDGPU_VM_PTE_COUNT(adev);
-}
-
-/**
- * amdgpu_vm_num_ats_entries - return the number of ATS entries in the root PD
- *
- * @adev: amdgpu_device pointer
- *
- * Returns:
- * The number of entries in the root page directory which needs the ATS setting.
- */
-static unsigned amdgpu_vm_num_ats_entries(struct amdgpu_device *adev)
-{
- unsigned shift;
-
- shift = amdgpu_vm_level_shift(adev, adev->vm_manager.root_level);
- return AMDGPU_GMC_HOLE_START >> (shift + AMDGPU_GPU_PAGE_SHIFT);
-}
-
-/**
- * amdgpu_vm_entries_mask - the mask to get the entry number of a PD/PT
- *
- * @adev: amdgpu_device pointer
- * @level: VMPT level
- *
- * Returns:
- * The mask to extract the entry number of a PD/PT from an address.
- */
-static uint32_t amdgpu_vm_entries_mask(struct amdgpu_device *adev,
- unsigned int level)
-{
- if (level <= adev->vm_manager.root_level)
- return 0xffffffff;
- else if (level != AMDGPU_VM_PTB)
- return 0x1ff;
- else
- return AMDGPU_VM_PTE_COUNT(adev) - 1;
-}
-
-/**
- * amdgpu_vm_bo_size - returns the size of the BOs in bytes
- *
- * @adev: amdgpu_device pointer
- * @level: VMPT level
- *
- * Returns:
- * The size of the BO for a page directory or page table in bytes.
- */
-static unsigned amdgpu_vm_bo_size(struct amdgpu_device *adev, unsigned level)
-{
- return AMDGPU_GPU_PAGE_ALIGN(amdgpu_vm_num_entries(adev, level) * 8);
-}
-
/**
* amdgpu_vm_bo_evicted - vm_bo is evicted
*
@@ -358,9 +256,8 @@ static void amdgpu_vm_bo_done(struct amdgpu_vm_bo_base *vm_bo)
* Initialize a bo_va_base structure and add it to the appropriate lists
*
*/
-static void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base,
- struct amdgpu_vm *vm,
- struct amdgpu_bo *bo)
+void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base,
+ struct amdgpu_vm *vm, struct amdgpu_bo *bo)
{
base->vm = vm;
base->bo = bo;
@@ -395,228 +292,6 @@ static void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base,
amdgpu_vm_bo_evicted(base);
}
-/**
- * amdgpu_vm_pt_parent - get the parent page directory
- *
- * @pt: child page table
- *
- * Helper to get the parent entry for the child page table. NULL if we are at
- * the root page directory.
- */
-static struct amdgpu_vm_bo_base *amdgpu_vm_pt_parent(struct amdgpu_vm_bo_base *pt)
-{
- struct amdgpu_bo *parent = pt->bo->parent;
-
- if (!parent)
- return NULL;
-
- return parent->vm_bo;
-}
-
-/*
- * amdgpu_vm_pt_cursor - state for for_each_amdgpu_vm_pt
- */
-struct amdgpu_vm_pt_cursor {
- uint64_t pfn;
- struct amdgpu_vm_bo_base *parent;
- struct amdgpu_vm_bo_base *entry;
- unsigned level;
-};
-
-/**
- * amdgpu_vm_pt_start - start PD/PT walk
- *
- * @adev: amdgpu_device pointer
- * @vm: amdgpu_vm structure
- * @start: start address of the walk
- * @cursor: state to initialize
- *
- * Initialize a amdgpu_vm_pt_cursor to start a walk.
- */
-static void amdgpu_vm_pt_start(struct amdgpu_device *adev,
- struct amdgpu_vm *vm, uint64_t start,
- struct amdgpu_vm_pt_cursor *cursor)
-{
- cursor->pfn = start;
- cursor->parent = NULL;
- cursor->entry = &vm->root;
- cursor->level = adev->vm_manager.root_level;
-}
-
-/**
- * amdgpu_vm_pt_descendant - go to child node
- *
- * @adev: amdgpu_device pointer
- * @cursor: current state
- *
- * Walk to the child node of the current node.
- * Returns:
- * True if the walk was possible, false otherwise.
- */
-static bool amdgpu_vm_pt_descendant(struct amdgpu_device *adev,
- struct amdgpu_vm_pt_cursor *cursor)
-{
- unsigned mask, shift, idx;
-
- if ((cursor->level == AMDGPU_VM_PTB) || !cursor->entry ||
- !cursor->entry->bo)
- return false;
-
- mask = amdgpu_vm_entries_mask(adev, cursor->level);
- shift = amdgpu_vm_level_shift(adev, cursor->level);
-
- ++cursor->level;
- idx = (cursor->pfn >> shift) & mask;
- cursor->parent = cursor->entry;
- cursor->entry = &to_amdgpu_bo_vm(cursor->entry->bo)->entries[idx];
- return true;
-}
-
-/**
- * amdgpu_vm_pt_sibling - go to sibling node
- *
- * @adev: amdgpu_device pointer
- * @cursor: current state
- *
- * Walk to the sibling node of the current node.
- * Returns:
- * True if the walk was possible, false otherwise.
- */
-static bool amdgpu_vm_pt_sibling(struct amdgpu_device *adev,
- struct amdgpu_vm_pt_cursor *cursor)
-{
- unsigned shift, num_entries;
-
- /* Root doesn't have a sibling */
- if (!cursor->parent)
- return false;
-
- /* Go to our parents and see if we got a sibling */
- shift = amdgpu_vm_level_shift(adev, cursor->level - 1);
- num_entries = amdgpu_vm_num_entries(adev, cursor->level - 1);
-
- if (cursor->entry == &to_amdgpu_bo_vm(cursor->parent->bo)->entries[num_entries - 1])
- return false;
-
- cursor->pfn += 1ULL << shift;
- cursor->pfn &= ~((1ULL << shift) - 1);
- ++cursor->entry;
- return true;
-}
-
-/**
- * amdgpu_vm_pt_ancestor - go to parent node
- *
- * @cursor: current state
- *
- * Walk to the parent node of the current node.
- * Returns:
- * True if the walk was possible, false otherwise.
- */
-static bool amdgpu_vm_pt_ancestor(struct amdgpu_vm_pt_cursor *cursor)
-{
- if (!cursor->parent)
- return false;
-
- --cursor->level;
- cursor->entry = cursor->parent;
- cursor->parent = amdgpu_vm_pt_parent(cursor->parent);
- return true;
-}
-
-/**
- * amdgpu_vm_pt_next - get next PD/PT in hieratchy
- *
- * @adev: amdgpu_device pointer
- * @cursor: current state
- *
- * Walk the PD/PT tree to the next node.
- */
-static void amdgpu_vm_pt_next(struct amdgpu_device *adev,
- struct amdgpu_vm_pt_cursor *cursor)
-{
- /* First try a newborn child */
- if (amdgpu_vm_pt_descendant(adev, cursor))
- return;
-
- /* If that didn't worked try to find a sibling */
- while (!amdgpu_vm_pt_sibling(adev, cursor)) {
- /* No sibling, go to our parents and grandparents */
- if (!amdgpu_vm_pt_ancestor(cursor)) {
- cursor->pfn = ~0ll;
- return;
- }
- }
-}
-
-/**
- * amdgpu_vm_pt_first_dfs - start a deep first search
- *
- * @adev: amdgpu_device structure
- * @vm: amdgpu_vm structure
- * @start: optional cursor to start with
- * @cursor: state to initialize
- *
- * Starts a deep first traversal of the PD/PT tree.
- */
-static void amdgpu_vm_pt_first_dfs(struct amdgpu_device *adev,
- struct amdgpu_vm *vm,
- struct amdgpu_vm_pt_cursor *start,
- struct amdgpu_vm_pt_cursor *cursor)
-{
- if (start)
- *cursor = *start;
- else
- amdgpu_vm_pt_start(adev, vm, 0, cursor);
- while (amdgpu_vm_pt_descendant(adev, cursor));
-}
-
-/**
- * amdgpu_vm_pt_continue_dfs - check if the deep first search should continue
- *
- * @start: starting point for the search
- * @entry: current entry
- *
- * Returns:
- * True when the search should continue, false otherwise.
- */
-static bool amdgpu_vm_pt_continue_dfs(struct amdgpu_vm_pt_cursor *start,
- struct amdgpu_vm_bo_base *entry)
-{
- return entry && (!start || entry != start->entry);
-}
-
-/**
- * amdgpu_vm_pt_next_dfs - get the next node for a deep first search
- *
- * @adev: amdgpu_device structure
- * @cursor: current state
- *
- * Move the cursor to the next node in a deep first search.
- */
-static void amdgpu_vm_pt_next_dfs(struct amdgpu_device *adev,
- struct amdgpu_vm_pt_cursor *cursor)
-{
- if (!cursor->entry)
- return;
-
- if (!cursor->parent)
- cursor->entry = NULL;
- else if (amdgpu_vm_pt_sibling(adev, cursor))
- while (amdgpu_vm_pt_descendant(adev, cursor));
- else
- amdgpu_vm_pt_ancestor(cursor);
-}
-
-/*
- * for_each_amdgpu_vm_pt_dfs_safe - safe deep first search of all PDs/PTs
- */
-#define for_each_amdgpu_vm_pt_dfs_safe(adev, vm, start, cursor, entry) \
- for (amdgpu_vm_pt_first_dfs((adev), (vm), (start), &(cursor)), \
- (entry) = (cursor).entry, amdgpu_vm_pt_next_dfs((adev), &(cursor));\
- amdgpu_vm_pt_continue_dfs((start), (entry)); \
- (entry) = (cursor).entry, amdgpu_vm_pt_next_dfs((adev), &(cursor)))
-
/**
* amdgpu_vm_get_pd_bo - add the VM PD to a validation list
*
@@ -783,312 +458,6 @@ bool amdgpu_vm_ready(struct amdgpu_vm *vm)
return ret && list_empty(&vm->evicted);
}
-/**
- * amdgpu_vm_clear_bo - initially clear the PDs/PTs
- *
- * @adev: amdgpu_device pointer
- * @vm: VM to clear BO from
- * @vmbo: BO to clear
- * @immediate: use an immediate update
- *
- * Root PD needs to be reserved when calling this.
- *
- * Returns:
- * 0 on success, errno otherwise.
- */
-static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
- struct amdgpu_vm *vm,
- struct amdgpu_bo_vm *vmbo,
- bool immediate)
-{
- struct ttm_operation_ctx ctx = { true, false };
- unsigned level = adev->vm_manager.root_level;
- struct amdgpu_vm_update_params params;
- struct amdgpu_bo *ancestor = &vmbo->bo;
- struct amdgpu_bo *bo = &vmbo->bo;
- unsigned entries, ats_entries;
- uint64_t addr;
- int r, idx;
-
- /* Figure out our place in the hierarchy */
- if (ancestor->parent) {
- ++level;
- while (ancestor->parent->parent) {
- ++level;
- ancestor = ancestor->parent;
- }
- }
-
- entries = amdgpu_bo_size(bo) / 8;
- if (!vm->pte_support_ats) {
- ats_entries = 0;
-
- } else if (!bo->parent) {
- ats_entries = amdgpu_vm_num_ats_entries(adev);
- ats_entries = min(ats_entries, entries);
- entries -= ats_entries;
-
- } else {
- struct amdgpu_vm_bo_base *pt;
-
- pt = ancestor->vm_bo;
- ats_entries = amdgpu_vm_num_ats_entries(adev);
- if ((pt - to_amdgpu_bo_vm(vm->root.bo)->entries) >= ats_entries) {
- ats_entries = 0;
- } else {
- ats_entries = entries;
- entries = 0;
- }
- }
-
- r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
- if (r)
- return r;
-
- if (vmbo->shadow) {
- struct amdgpu_bo *shadow = vmbo->shadow;
-
- r = ttm_bo_validate(&shadow->tbo, &shadow->placement, &ctx);
- if (r)
- return r;
- }
-
- if (!drm_dev_enter(adev_to_drm(adev), &idx))
- return -ENODEV;
-
- r = vm->update_funcs->map_table(vmbo);
- if (r)
- goto exit;
-
- memset(¶ms, 0, sizeof(params));
- params.adev = adev;
- params.vm = vm;
- params.immediate = immediate;
-
- r = vm->update_funcs->prepare(¶ms, NULL, AMDGPU_SYNC_EXPLICIT);
- if (r)
- goto exit;
-
- addr = 0;
- if (ats_entries) {
- uint64_t value = 0, flags;
-
- flags = AMDGPU_PTE_DEFAULT_ATC;
- if (level != AMDGPU_VM_PTB) {
- /* Handle leaf PDEs as PTEs */
- flags |= AMDGPU_PDE_PTE;
- amdgpu_gmc_get_vm_pde(adev, level, &value, &flags);
- }
-
- r = vm->update_funcs->update(¶ms, vmbo, addr, 0, ats_entries,
- value, flags);
- if (r)
- goto exit;
-
- addr += ats_entries * 8;
- }
-
- if (entries) {
- uint64_t value = 0, flags = 0;
-
- if (adev->asic_type >= CHIP_VEGA10) {
- if (level != AMDGPU_VM_PTB) {
- /* Handle leaf PDEs as PTEs */
- flags |= AMDGPU_PDE_PTE;
- amdgpu_gmc_get_vm_pde(adev, level,
- &value, &flags);
- } else {
- /* Workaround for fault priority problem on GMC9 */
- flags = AMDGPU_PTE_EXECUTABLE;
- }
- }
-
- r = vm->update_funcs->update(¶ms, vmbo, addr, 0, entries,
- value, flags);
- if (r)
- goto exit;
- }
-
- r = vm->update_funcs->commit(¶ms, NULL);
-exit:
- drm_dev_exit(idx);
- return r;
-}
-
-/**
- * amdgpu_vm_pt_create - create bo for PD/PT
- *
- * @adev: amdgpu_device pointer
- * @vm: requesting vm
- * @level: the page table level
- * @immediate: use a immediate update
- * @vmbo: pointer to the buffer object pointer
- */
-static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
- struct amdgpu_vm *vm,
- int level, bool immediate,
- struct amdgpu_bo_vm **vmbo)
-{
- struct amdgpu_bo_param bp;
- struct amdgpu_bo *bo;
- struct dma_resv *resv;
- unsigned int num_entries;
- int r;
-
- memset(&bp, 0, sizeof(bp));
-
- bp.size = amdgpu_vm_bo_size(adev, level);
- bp.byte_align = AMDGPU_GPU_PAGE_SIZE;
- bp.domain = AMDGPU_GEM_DOMAIN_VRAM;
- bp.domain = amdgpu_bo_get_preferred_domain(adev, bp.domain);
- bp.flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
- AMDGPU_GEM_CREATE_CPU_GTT_USWC;
-
- if (level < AMDGPU_VM_PTB)
- num_entries = amdgpu_vm_num_entries(adev, level);
- else
- num_entries = 0;
-
- bp.bo_ptr_size = struct_size((*vmbo), entries, num_entries);
-
- if (vm->use_cpu_for_update)
- bp.flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
-
- bp.type = ttm_bo_type_kernel;
- bp.no_wait_gpu = immediate;
- if (vm->root.bo)
- bp.resv = vm->root.bo->tbo.base.resv;
-
- r = amdgpu_bo_create_vm(adev, &bp, vmbo);
- if (r)
- return r;
-
- bo = &(*vmbo)->bo;
- if (vm->is_compute_context || (adev->flags & AMD_IS_APU)) {
- (*vmbo)->shadow = NULL;
- return 0;
- }
-
- if (!bp.resv)
- WARN_ON(dma_resv_lock(bo->tbo.base.resv,
- NULL));
- resv = bp.resv;
- memset(&bp, 0, sizeof(bp));
- bp.size = amdgpu_vm_bo_size(adev, level);
- bp.domain = AMDGPU_GEM_DOMAIN_GTT;
- bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC;
- bp.type = ttm_bo_type_kernel;
- bp.resv = bo->tbo.base.resv;
- bp.bo_ptr_size = sizeof(struct amdgpu_bo);
-
- r = amdgpu_bo_create(adev, &bp, &(*vmbo)->shadow);
-
- if (!resv)
- dma_resv_unlock(bo->tbo.base.resv);
-
- if (r) {
- amdgpu_bo_unref(&bo);
- return r;
- }
-
- (*vmbo)->shadow->parent = amdgpu_bo_ref(bo);
- amdgpu_bo_add_to_shadow_list(*vmbo);
-
- return 0;
-}
-
-/**
- * amdgpu_vm_alloc_pts - Allocate a specific page table
- *
- * @adev: amdgpu_device pointer
- * @vm: VM to allocate page tables for
- * @cursor: Which page table to allocate
- * @immediate: use an immediate update
- *
- * Make sure a specific page table or directory is allocated.
- *
- * Returns:
- * 1 if page table needed to be allocated, 0 if page table was already
- * allocated, negative errno if an error occurred.
- */
-static int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
- struct amdgpu_vm *vm,
- struct amdgpu_vm_pt_cursor *cursor,
- bool immediate)
-{
- struct amdgpu_vm_bo_base *entry = cursor->entry;
- struct amdgpu_bo *pt_bo;
- struct amdgpu_bo_vm *pt;
- int r;
-
- if (entry->bo)
- return 0;
-
- r = amdgpu_vm_pt_create(adev, vm, cursor->level, immediate, &pt);
- if (r)
- return r;
-
- /* Keep a reference to the root directory to avoid
- * freeing them up in the wrong order.
- */
- pt_bo = &pt->bo;
- pt_bo->parent = amdgpu_bo_ref(cursor->parent->bo);
- amdgpu_vm_bo_base_init(entry, vm, pt_bo);
- r = amdgpu_vm_clear_bo(adev, vm, pt, immediate);
- if (r)
- goto error_free_pt;
-
- return 0;
-
-error_free_pt:
- amdgpu_bo_unref(&pt->shadow);
- amdgpu_bo_unref(&pt_bo);
- return r;
-}
-
-/**
- * amdgpu_vm_free_table - fre one PD/PT
- *
- * @entry: PDE to free
- */
-static void amdgpu_vm_free_table(struct amdgpu_vm_bo_base *entry)
-{
- struct amdgpu_bo *shadow;
-
- if (!entry->bo)
- return;
- shadow = amdgpu_bo_shadowed(entry->bo);
- entry->bo->vm_bo = NULL;
- list_del(&entry->vm_status);
- amdgpu_bo_unref(&shadow);
- amdgpu_bo_unref(&entry->bo);
-}
-
-/**
- * amdgpu_vm_free_pts - free PD/PT levels
- *
- * @adev: amdgpu device structure
- * @vm: amdgpu vm structure
- * @start: optional cursor where to start freeing PDs/PTs
- *
- * Free the page directory or page table level and all sub levels.
- */
-static void amdgpu_vm_free_pts(struct amdgpu_device *adev,
- struct amdgpu_vm *vm,
- struct amdgpu_vm_pt_cursor *start)
-{
- struct amdgpu_vm_pt_cursor cursor;
- struct amdgpu_vm_bo_base *entry;
-
- vm->bulk_moveable = false;
-
- for_each_amdgpu_vm_pt_dfs_safe(adev, vm, start, cursor, entry)
- amdgpu_vm_free_table(entry);
-
- if (start)
- amdgpu_vm_free_table(start->entry);
-}
-
/**
* amdgpu_vm_check_compute_bug - check whether asic has compute vm bug
*
@@ -1335,34 +704,6 @@ uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr)
return result;
}
-/**
- * amdgpu_vm_update_pde - update a single level in the hierarchy
- *
- * @params: parameters for the update
- * @vm: requested vm
- * @entry: entry to update
- *
- * Makes sure the requested entry in parent is up to date.
- */
-static int amdgpu_vm_update_pde(struct amdgpu_vm_update_params *params,
- struct amdgpu_vm *vm,
- struct amdgpu_vm_bo_base *entry)
-{
- struct amdgpu_vm_bo_base *parent = amdgpu_vm_pt_parent(entry);
- struct amdgpu_bo *bo = parent->bo, *pbo;
- uint64_t pde, pt, flags;
- unsigned level;
-
- for (level = 0, pbo = bo->parent; pbo; ++level)
- pbo = pbo->parent;
-
- level += params->adev->vm_manager.root_level;
- amdgpu_gmc_get_pde_for_bo(entry->bo, level, &pt, &flags);
- pde = (entry - to_amdgpu_bo_vm(parent->bo)->entries) * 8;
- return vm->update_funcs->update(params, to_amdgpu_bo_vm(bo), pde, pt,
- 1, 0, flags);
-}
-
/**
* amdgpu_vm_update_pdes - make sure that all directories are valid
*
@@ -1398,7 +739,7 @@ int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
goto error;
list_for_each_entry(entry, &vm->relocated, vm_status) {
- r = amdgpu_vm_update_pde(¶ms, vm, entry);
+ r = amdgpu_vm_pde_update(¶ms, entry);
if (r)
goto error;
}
@@ -1419,252 +760,6 @@ int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
return r;
}
-/*
- * amdgpu_vm_update_flags - figure out flags for PTE updates
- *
- * Make sure to set the right flags for the PTEs at the desired level.
- */
-static void amdgpu_vm_update_flags(struct amdgpu_vm_update_params *params,
- struct amdgpu_bo_vm *pt, unsigned int level,
- uint64_t pe, uint64_t addr,
- unsigned int count, uint32_t incr,
- uint64_t flags)
-
-{
- if (level != AMDGPU_VM_PTB) {
- flags |= AMDGPU_PDE_PTE;
- amdgpu_gmc_get_vm_pde(params->adev, level, &addr, &flags);
-
- } else if (params->adev->asic_type >= CHIP_VEGA10 &&
- !(flags & AMDGPU_PTE_VALID) &&
- !(flags & AMDGPU_PTE_PRT)) {
-
- /* Workaround for fault priority problem on GMC9 */
- flags |= AMDGPU_PTE_EXECUTABLE;
- }
-
- params->vm->update_funcs->update(params, pt, pe, addr, count, incr,
- flags);
-}
-
-/**
- * amdgpu_vm_fragment - get fragment for PTEs
- *
- * @params: see amdgpu_vm_update_params definition
- * @start: first PTE to handle
- * @end: last PTE to handle
- * @flags: hw mapping flags
- * @frag: resulting fragment size
- * @frag_end: end of this fragment
- *
- * Returns the first possible fragment for the start and end address.
- */
-static void amdgpu_vm_fragment(struct amdgpu_vm_update_params *params,
- uint64_t start, uint64_t end, uint64_t flags,
- unsigned int *frag, uint64_t *frag_end)
-{
- /**
- * The MC L1 TLB supports variable sized pages, based on a fragment
- * field in the PTE. When this field is set to a non-zero value, page
- * granularity is increased from 4KB to (1 << (12 + frag)). The PTE
- * flags are considered valid for all PTEs within the fragment range
- * and corresponding mappings are assumed to be physically contiguous.
- *
- * The L1 TLB can store a single PTE for the whole fragment,
- * significantly increasing the space available for translation
- * caching. This leads to large improvements in throughput when the
- * TLB is under pressure.
- *
- * The L2 TLB distributes small and large fragments into two
- * asymmetric partitions. The large fragment cache is significantly
- * larger. Thus, we try to use large fragments wherever possible.
- * Userspace can support this by aligning virtual base address and
- * allocation size to the fragment size.
- *
- * Starting with Vega10 the fragment size only controls the L1. The L2
- * is now directly feed with small/huge/giant pages from the walker.
- */
- unsigned max_frag;
-
- if (params->adev->asic_type < CHIP_VEGA10)
- max_frag = params->adev->vm_manager.fragment_size;
- else
- max_frag = 31;
-
- /* system pages are non continuously */
- if (params->pages_addr) {
- *frag = 0;
- *frag_end = end;
- return;
- }
-
- /* This intentionally wraps around if no bit is set */
- *frag = min((unsigned)ffs(start) - 1, (unsigned)fls64(end - start) - 1);
- if (*frag >= max_frag) {
- *frag = max_frag;
- *frag_end = end & ~((1ULL << max_frag) - 1);
- } else {
- *frag_end = start + (1 << *frag);
- }
-}
-
-/**
- * amdgpu_vm_update_ptes - make sure that page tables are valid
- *
- * @params: see amdgpu_vm_update_params definition
- * @start: start of GPU address range
- * @end: end of GPU address range
- * @dst: destination address to map to, the next dst inside the function
- * @flags: mapping flags
- *
- * Update the page tables in the range @start - @end.
- *
- * Returns:
- * 0 for success, -EINVAL for failure.
- */
-static int amdgpu_vm_update_ptes(struct amdgpu_vm_update_params *params,
- uint64_t start, uint64_t end,
- uint64_t dst, uint64_t flags)
-{
- struct amdgpu_device *adev = params->adev;
- struct amdgpu_vm_pt_cursor cursor;
- uint64_t frag_start = start, frag_end;
- unsigned int frag;
- int r;
-
- /* figure out the initial fragment */
- amdgpu_vm_fragment(params, frag_start, end, flags, &frag, &frag_end);
-
- /* walk over the address space and update the PTs */
- amdgpu_vm_pt_start(adev, params->vm, start, &cursor);
- while (cursor.pfn < end) {
- unsigned shift, parent_shift, mask;
- uint64_t incr, entry_end, pe_start;
- struct amdgpu_bo *pt;
-
- if (!params->unlocked) {
- /* make sure that the page tables covering the
- * address range are actually allocated
- */
- r = amdgpu_vm_alloc_pts(params->adev, params->vm,
- &cursor, params->immediate);
- if (r)
- return r;
- }
-
- shift = amdgpu_vm_level_shift(adev, cursor.level);
- parent_shift = amdgpu_vm_level_shift(adev, cursor.level - 1);
- if (params->unlocked) {
- /* Unlocked updates are only allowed on the leaves */
- if (amdgpu_vm_pt_descendant(adev, &cursor))
- continue;
- } else if (adev->asic_type < CHIP_VEGA10 &&
- (flags & AMDGPU_PTE_VALID)) {
- /* No huge page support before GMC v9 */
- if (cursor.level != AMDGPU_VM_PTB) {
- if (!amdgpu_vm_pt_descendant(adev, &cursor))
- return -ENOENT;
- continue;
- }
- } else if (frag < shift) {
- /* We can't use this level when the fragment size is
- * smaller than the address shift. Go to the next
- * child entry and try again.
- */
- if (amdgpu_vm_pt_descendant(adev, &cursor))
- continue;
- } else if (frag >= parent_shift) {
- /* If the fragment size is even larger than the parent
- * shift we should go up one level and check it again.
- */
- if (!amdgpu_vm_pt_ancestor(&cursor))
- return -EINVAL;
- continue;
- }
-
- pt = cursor.entry->bo;
- if (!pt) {
- /* We need all PDs and PTs for mapping something, */
- if (flags & AMDGPU_PTE_VALID)
- return -ENOENT;
-
- /* but unmapping something can happen at a higher
- * level.
- */
- if (!amdgpu_vm_pt_ancestor(&cursor))
- return -EINVAL;
-
- pt = cursor.entry->bo;
- shift = parent_shift;
- frag_end = max(frag_end, ALIGN(frag_start + 1,
- 1ULL << shift));
- }
-
- /* Looks good so far, calculate parameters for the update */
- incr = (uint64_t)AMDGPU_GPU_PAGE_SIZE << shift;
- mask = amdgpu_vm_entries_mask(adev, cursor.level);
- pe_start = ((cursor.pfn >> shift) & mask) * 8;
- entry_end = ((uint64_t)mask + 1) << shift;
- entry_end += cursor.pfn & ~(entry_end - 1);
- entry_end = min(entry_end, end);
-
- do {
- struct amdgpu_vm *vm = params->vm;
- uint64_t upd_end = min(entry_end, frag_end);
- unsigned nptes = (upd_end - frag_start) >> shift;
- uint64_t upd_flags = flags | AMDGPU_PTE_FRAG(frag);
-
- /* This can happen when we set higher level PDs to
- * silent to stop fault floods.
- */
- nptes = max(nptes, 1u);
-
- trace_amdgpu_vm_update_ptes(params, frag_start, upd_end,
- min(nptes, 32u), dst, incr, upd_flags,
- vm->task_info.pid,
- vm->immediate.fence_context);
- amdgpu_vm_update_flags(params, to_amdgpu_bo_vm(pt),
- cursor.level, pe_start, dst,
- nptes, incr, upd_flags);
-
- pe_start += nptes * 8;
- dst += nptes * incr;
-
- frag_start = upd_end;
- if (frag_start >= frag_end) {
- /* figure out the next fragment */
- amdgpu_vm_fragment(params, frag_start, end,
- flags, &frag, &frag_end);
- if (frag < shift)
- break;
- }
- } while (frag_start < entry_end);
-
- if (amdgpu_vm_pt_descendant(adev, &cursor)) {
- /* Free all child entries.
- * Update the tables with the flags and addresses and free up subsequent
- * tables in the case of huge pages or freed up areas.
- * This is the maximum you can free, because all other page tables are not
- * completely covered by the range and so potentially still in use.
- */
- while (cursor.pfn < frag_start) {
- /* Make sure previous mapping is freed */
- if (cursor.entry->bo) {
- params->table_freed = true;
- amdgpu_vm_free_pts(adev, params->vm, &cursor);
- }
- amdgpu_vm_pt_next(adev, &cursor);
- }
-
- } else if (frag >= shift) {
- /* or just move on to the next on the same level. */
- amdgpu_vm_pt_next(adev, &cursor);
- }
- }
-
- return 0;
-}
-
/**
* amdgpu_vm_bo_update_mapping - update a mapping in the vm page table
*
@@ -1785,7 +880,7 @@ int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
}
tmp = start + num_entries;
- r = amdgpu_vm_update_ptes(¶ms, start, tmp, addr, flags);
+ r = amdgpu_vm_ptes_update(¶ms, start, tmp, addr, flags);
if (r)
goto error_unlock;
@@ -2964,7 +2059,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
amdgpu_vm_bo_base_init(&vm->root, vm, root_bo);
- r = amdgpu_vm_clear_bo(adev, vm, root, false);
+ r = amdgpu_vm_pt_clear(adev, vm, root, false);
if (r)
goto error_unreserve;
@@ -2992,34 +2087,6 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
return r;
}
-/**
- * amdgpu_vm_check_clean_reserved - check if a VM is clean
- *
- * @adev: amdgpu_device pointer
- * @vm: the VM to check
- *
- * check all entries of the root PD, if any subsequent PDs are allocated,
- * it means there are page table creating and filling, and is no a clean
- * VM
- *
- * Returns:
- * 0 if this VM is clean
- */
-static int amdgpu_vm_check_clean_reserved(struct amdgpu_device *adev,
- struct amdgpu_vm *vm)
-{
- enum amdgpu_vm_level root = adev->vm_manager.root_level;
- unsigned int entries = amdgpu_vm_num_entries(adev, root);
- unsigned int i = 0;
-
- for (i = 0; i < entries; i++) {
- if (to_amdgpu_bo_vm(vm->root.bo)->entries[i].bo)
- return -EINVAL;
- }
-
- return 0;
-}
-
/**
* amdgpu_vm_make_compute - Turn a GFX VM into a compute VM
*
@@ -3049,17 +2116,17 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm)
return r;
/* Sanity checks */
- r = amdgpu_vm_check_clean_reserved(adev, vm);
- if (r)
+ if (!amdgpu_vm_pt_is_root_clean(adev, vm)) {
+ r = -EINVAL;
goto unreserve_bo;
+ }
/* Check if PD needs to be reinitialized and do it before
* changing any other state, in case it fails.
*/
if (pte_support_ats != vm->pte_support_ats) {
vm->pte_support_ats = pte_support_ats;
- r = amdgpu_vm_clear_bo(adev, vm,
- to_amdgpu_bo_vm(vm->root.bo),
+ r = amdgpu_vm_pt_clear(adev, vm, to_amdgpu_bo_vm(vm->root.bo),
false);
if (r)
goto unreserve_bo;
@@ -3147,7 +2214,7 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
amdgpu_vm_free_mapping(adev, vm, mapping, NULL);
}
- amdgpu_vm_free_pts(adev, vm, NULL);
+ amdgpu_vm_pt_free_root(adev, vm);
amdgpu_bo_unreserve(root);
amdgpu_bo_unref(&root);
WARN_ON(vm->root.bo);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index a40a6a993bb0..1731681914f5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -397,6 +397,8 @@ int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
struct dma_fence **fence);
int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
struct amdgpu_vm *vm);
+void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base,
+ struct amdgpu_vm *vm, struct amdgpu_bo *bo);
int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
struct amdgpu_device *bo_adev,
struct amdgpu_vm *vm, bool immediate,
@@ -458,6 +460,20 @@ void amdgpu_vm_del_from_lru_notify(struct ttm_buffer_object *bo);
void amdgpu_vm_get_memory(struct amdgpu_vm *vm, uint64_t *vram_mem,
uint64_t *gtt_mem, uint64_t *cpu_mem);
+int amdgpu_vm_pt_clear(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+ struct amdgpu_bo_vm *vmbo, bool immediate);
+int amdgpu_vm_pt_create(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+ int level, bool immediate, struct amdgpu_bo_vm **vmbo);
+void amdgpu_vm_pt_free_root(struct amdgpu_device *adev, struct amdgpu_vm *vm);
+bool amdgpu_vm_pt_is_root_clean(struct amdgpu_device *adev,
+ struct amdgpu_vm *vm);
+
+int amdgpu_vm_pde_update(struct amdgpu_vm_update_params *params,
+ struct amdgpu_vm_bo_base *entry);
+int amdgpu_vm_ptes_update(struct amdgpu_vm_update_params *params,
+ uint64_t start, uint64_t end,
+ uint64_t dst, uint64_t flags);
+
#if defined(CONFIG_DEBUG_FS)
void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m);
#endif
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
new file mode 100644
index 000000000000..a821ada5f8ca
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
@@ -0,0 +1,979 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright 2022 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <drm/drm_drv.h>
+
+#include "amdgpu.h"
+#include "amdgpu_trace.h"
+#include "amdgpu_vm.h"
+
+/*
+ * amdgpu_vm_pt_cursor - state for for_each_amdgpu_vm_pt
+ */
+struct amdgpu_vm_pt_cursor {
+ uint64_t pfn;
+ struct amdgpu_vm_bo_base *parent;
+ struct amdgpu_vm_bo_base *entry;
+ unsigned int level;
+};
+
+/**
+ * amdgpu_vm_pt_level_shift - return the addr shift for each level
+ *
+ * @adev: amdgpu_device pointer
+ * @level: VMPT level
+ *
+ * Returns:
+ * The number of bits the pfn needs to be right shifted for a level.
+ */
+static unsigned int amdgpu_vm_pt_level_shift(struct amdgpu_device *adev,
+ unsigned int level)
+{
+ switch (level) {
+ case AMDGPU_VM_PDB2:
+ case AMDGPU_VM_PDB1:
+ case AMDGPU_VM_PDB0:
+ return 9 * (AMDGPU_VM_PDB0 - level) +
+ adev->vm_manager.block_size;
+ case AMDGPU_VM_PTB:
+ return 0;
+ default:
+ return ~0;
+ }
+}
+
+/**
+ * amdgpu_vm_pt_num_entries - return the number of entries in a PD/PT
+ *
+ * @adev: amdgpu_device pointer
+ * @level: VMPT level
+ *
+ * Returns:
+ * The number of entries in a page directory or page table.
+ */
+static unsigned int amdgpu_vm_pt_num_entries(struct amdgpu_device *adev,
+ unsigned int level)
+{
+ unsigned int shift;
+
+ shift = amdgpu_vm_pt_level_shift(adev, adev->vm_manager.root_level);
+ if (level == adev->vm_manager.root_level)
+ /* For the root directory */
+ return round_up(adev->vm_manager.max_pfn, 1ULL << shift)
+ >> shift;
+ else if (level != AMDGPU_VM_PTB)
+ /* Everything in between */
+ return 512;
+
+ /* For the page tables on the leaves */
+ return AMDGPU_VM_PTE_COUNT(adev);
+}
+
+/**
+ * amdgpu_vm_pt_num_ats_entries - return the number of ATS entries in the root PD
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Returns:
+ * The number of entries in the root page directory which needs the ATS setting.
+ */
+static unsigned int amdgpu_vm_pt_num_ats_entries(struct amdgpu_device *adev)
+{
+ unsigned int shift;
+
+ shift = amdgpu_vm_pt_level_shift(adev, adev->vm_manager.root_level);
+ return AMDGPU_GMC_HOLE_START >> (shift + AMDGPU_GPU_PAGE_SHIFT);
+}
+
+/**
+ * amdgpu_vm_pt_entries_mask - the mask to get the entry number of a PD/PT
+ *
+ * @adev: amdgpu_device pointer
+ * @level: VMPT level
+ *
+ * Returns:
+ * The mask to extract the entry number of a PD/PT from an address.
+ */
+static uint32_t amdgpu_vm_pt_entries_mask(struct amdgpu_device *adev,
+ unsigned int level)
+{
+ if (level <= adev->vm_manager.root_level)
+ return 0xffffffff;
+ else if (level != AMDGPU_VM_PTB)
+ return 0x1ff;
+ else
+ return AMDGPU_VM_PTE_COUNT(adev) - 1;
+}
+
+/**
+ * amdgpu_vm_pt_size - returns the size of the page table in bytes
+ *
+ * @adev: amdgpu_device pointer
+ * @level: VMPT level
+ *
+ * Returns:
+ * The size of the BO for a page directory or page table in bytes.
+ */
+static unsigned int amdgpu_vm_pt_size(struct amdgpu_device *adev,
+ unsigned int level)
+{
+ return AMDGPU_GPU_PAGE_ALIGN(amdgpu_vm_pt_num_entries(adev, level) * 8);
+}
+
+/**
+ * amdgpu_vm_pt_parent - get the parent page directory
+ *
+ * @pt: child page table
+ *
+ * Helper to get the parent entry for the child page table. NULL if we are at
+ * the root page directory.
+ */
+static struct amdgpu_vm_bo_base *
+amdgpu_vm_pt_parent(struct amdgpu_vm_bo_base *pt)
+{
+ struct amdgpu_bo *parent = pt->bo->parent;
+
+ if (!parent)
+ return NULL;
+
+ return parent->vm_bo;
+}
+
+/**
+ * amdgpu_vm_pt_start - start PD/PT walk
+ *
+ * @adev: amdgpu_device pointer
+ * @vm: amdgpu_vm structure
+ * @start: start address of the walk
+ * @cursor: state to initialize
+ *
+ * Initialize a amdgpu_vm_pt_cursor to start a walk.
+ */
+static void amdgpu_vm_pt_start(struct amdgpu_device *adev,
+ struct amdgpu_vm *vm, uint64_t start,
+ struct amdgpu_vm_pt_cursor *cursor)
+{
+ cursor->pfn = start;
+ cursor->parent = NULL;
+ cursor->entry = &vm->root;
+ cursor->level = adev->vm_manager.root_level;
+}
+
+/**
+ * amdgpu_vm_pt_descendant - go to child node
+ *
+ * @adev: amdgpu_device pointer
+ * @cursor: current state
+ *
+ * Walk to the child node of the current node.
+ * Returns:
+ * True if the walk was possible, false otherwise.
+ */
+static bool amdgpu_vm_pt_descendant(struct amdgpu_device *adev,
+ struct amdgpu_vm_pt_cursor *cursor)
+{
+ unsigned int mask, shift, idx;
+
+ if ((cursor->level == AMDGPU_VM_PTB) || !cursor->entry ||
+ !cursor->entry->bo)
+ return false;
+
+ mask = amdgpu_vm_pt_entries_mask(adev, cursor->level);
+ shift = amdgpu_vm_pt_level_shift(adev, cursor->level);
+
+ ++cursor->level;
+ idx = (cursor->pfn >> shift) & mask;
+ cursor->parent = cursor->entry;
+ cursor->entry = &to_amdgpu_bo_vm(cursor->entry->bo)->entries[idx];
+ return true;
+}
+
+/**
+ * amdgpu_vm_pt_sibling - go to sibling node
+ *
+ * @adev: amdgpu_device pointer
+ * @cursor: current state
+ *
+ * Walk to the sibling node of the current node.
+ * Returns:
+ * True if the walk was possible, false otherwise.
+ */
+static bool amdgpu_vm_pt_sibling(struct amdgpu_device *adev,
+ struct amdgpu_vm_pt_cursor *cursor)
+{
+
+ unsigned int shift, num_entries;
+ struct amdgpu_bo_vm *parent;
+
+ /* Root doesn't have a sibling */
+ if (!cursor->parent)
+ return false;
+
+ /* Go to our parents and see if we got a sibling */
+ shift = amdgpu_vm_pt_level_shift(adev, cursor->level - 1);
+ num_entries = amdgpu_vm_pt_num_entries(adev, cursor->level - 1);
+ parent = to_amdgpu_bo_vm(cursor->parent->bo);
+
+ if (cursor->entry == &parent->entries[num_entries - 1])
+ return false;
+
+ cursor->pfn += 1ULL << shift;
+ cursor->pfn &= ~((1ULL << shift) - 1);
+ ++cursor->entry;
+ return true;
+}
+
+/**
+ * amdgpu_vm_pt_ancestor - go to parent node
+ *
+ * @cursor: current state
+ *
+ * Walk to the parent node of the current node.
+ * Returns:
+ * True if the walk was possible, false otherwise.
+ */
+static bool amdgpu_vm_pt_ancestor(struct amdgpu_vm_pt_cursor *cursor)
+{
+ if (!cursor->parent)
+ return false;
+
+ --cursor->level;
+ cursor->entry = cursor->parent;
+ cursor->parent = amdgpu_vm_pt_parent(cursor->parent);
+ return true;
+}
+
+/**
+ * amdgpu_vm_pt_next - get next PD/PT in hieratchy
+ *
+ * @adev: amdgpu_device pointer
+ * @cursor: current state
+ *
+ * Walk the PD/PT tree to the next node.
+ */
+static void amdgpu_vm_pt_next(struct amdgpu_device *adev,
+ struct amdgpu_vm_pt_cursor *cursor)
+{
+ /* First try a newborn child */
+ if (amdgpu_vm_pt_descendant(adev, cursor))
+ return;
+
+ /* If that didn't worked try to find a sibling */
+ while (!amdgpu_vm_pt_sibling(adev, cursor)) {
+ /* No sibling, go to our parents and grandparents */
+ if (!amdgpu_vm_pt_ancestor(cursor)) {
+ cursor->pfn = ~0ll;
+ return;
+ }
+ }
+}
+
+/**
+ * amdgpu_vm_pt_first_dfs - start a deep first search
+ *
+ * @adev: amdgpu_device structure
+ * @vm: amdgpu_vm structure
+ * @start: optional cursor to start with
+ * @cursor: state to initialize
+ *
+ * Starts a deep first traversal of the PD/PT tree.
+ */
+static void amdgpu_vm_pt_first_dfs(struct amdgpu_device *adev,
+ struct amdgpu_vm *vm,
+ struct amdgpu_vm_pt_cursor *start,
+ struct amdgpu_vm_pt_cursor *cursor)
+{
+ if (start)
+ *cursor = *start;
+ else
+ amdgpu_vm_pt_start(adev, vm, 0, cursor);
+
+ while (amdgpu_vm_pt_descendant(adev, cursor))
+ ;
+}
+
+/**
+ * amdgpu_vm_pt_continue_dfs - check if the deep first search should continue
+ *
+ * @start: starting point for the search
+ * @entry: current entry
+ *
+ * Returns:
+ * True when the search should continue, false otherwise.
+ */
+static bool amdgpu_vm_pt_continue_dfs(struct amdgpu_vm_pt_cursor *start,
+ struct amdgpu_vm_bo_base *entry)
+{
+ return entry && (!start || entry != start->entry);
+}
+
+/**
+ * amdgpu_vm_pt_next_dfs - get the next node for a deep first search
+ *
+ * @adev: amdgpu_device structure
+ * @cursor: current state
+ *
+ * Move the cursor to the next node in a deep first search.
+ */
+static void amdgpu_vm_pt_next_dfs(struct amdgpu_device *adev,
+ struct amdgpu_vm_pt_cursor *cursor)
+{
+ if (!cursor->entry)
+ return;
+
+ if (!cursor->parent)
+ cursor->entry = NULL;
+ else if (amdgpu_vm_pt_sibling(adev, cursor))
+ while (amdgpu_vm_pt_descendant(adev, cursor))
+ ;
+ else
+ amdgpu_vm_pt_ancestor(cursor);
+}
+
+/*
+ * for_each_amdgpu_vm_pt_dfs_safe - safe deep first search of all PDs/PTs
+ */
+#define for_each_amdgpu_vm_pt_dfs_safe(adev, vm, start, cursor, entry) \
+ for (amdgpu_vm_pt_first_dfs((adev), (vm), (start), &(cursor)), \
+ (entry) = (cursor).entry, amdgpu_vm_pt_next_dfs((adev), &(cursor));\
+ amdgpu_vm_pt_continue_dfs((start), (entry)); \
+ (entry) = (cursor).entry, amdgpu_vm_pt_next_dfs((adev), &(cursor)))
+
+/**
+ * amdgpu_vm_pt_clear - initially clear the PDs/PTs
+ *
+ * @adev: amdgpu_device pointer
+ * @vm: VM to clear BO from
+ * @vmbo: BO to clear
+ * @immediate: use an immediate update
+ *
+ * Root PD needs to be reserved when calling this.
+ *
+ * Returns:
+ * 0 on success, errno otherwise.
+ */
+int amdgpu_vm_pt_clear(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+ struct amdgpu_bo_vm *vmbo, bool immediate)
+{
+ unsigned int level = adev->vm_manager.root_level;
+ struct ttm_operation_ctx ctx = { true, false };
+ struct amdgpu_vm_update_params params;
+ struct amdgpu_bo *ancestor = &vmbo->bo;
+ unsigned int entries, ats_entries;
+ struct amdgpu_bo *bo = &vmbo->bo;
+ uint64_t addr;
+ int r, idx;
+
+ /* Figure out our place in the hierarchy */
+ if (ancestor->parent) {
+ ++level;
+ while (ancestor->parent->parent) {
+ ++level;
+ ancestor = ancestor->parent;
+ }
+ }
+
+ entries = amdgpu_bo_size(bo) / 8;
+ if (!vm->pte_support_ats) {
+ ats_entries = 0;
+
+ } else if (!bo->parent) {
+ ats_entries = amdgpu_vm_pt_num_ats_entries(adev);
+ ats_entries = min(ats_entries, entries);
+ entries -= ats_entries;
+
+ } else {
+ struct amdgpu_vm_bo_base *pt;
+
+ pt = ancestor->vm_bo;
+ ats_entries = amdgpu_vm_pt_num_ats_entries(adev);
+ if ((pt - to_amdgpu_bo_vm(vm->root.bo)->entries) >=
+ ats_entries) {
+ ats_entries = 0;
+ } else {
+ ats_entries = entries;
+ entries = 0;
+ }
+ }
+
+ r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
+ if (r)
+ return r;
+
+ if (vmbo->shadow) {
+ struct amdgpu_bo *shadow = vmbo->shadow;
+
+ r = ttm_bo_validate(&shadow->tbo, &shadow->placement, &ctx);
+ if (r)
+ return r;
+ }
+
+ if (!drm_dev_enter(adev_to_drm(adev), &idx))
+ return -ENODEV;
+
+ r = vm->update_funcs->map_table(vmbo);
+ if (r)
+ goto exit;
+
+ memset(¶ms, 0, sizeof(params));
+ params.adev = adev;
+ params.vm = vm;
+ params.immediate = immediate;
+
+ r = vm->update_funcs->prepare(¶ms, NULL, AMDGPU_SYNC_EXPLICIT);
+ if (r)
+ goto exit;
+
+ addr = 0;
+ if (ats_entries) {
+ uint64_t value = 0, flags;
+
+ flags = AMDGPU_PTE_DEFAULT_ATC;
+ if (level != AMDGPU_VM_PTB) {
+ /* Handle leaf PDEs as PTEs */
+ flags |= AMDGPU_PDE_PTE;
+ amdgpu_gmc_get_vm_pde(adev, level, &value, &flags);
+ }
+
+ r = vm->update_funcs->update(¶ms, vmbo, addr, 0,
+ ats_entries, value, flags);
+ if (r)
+ goto exit;
+
+ addr += ats_entries * 8;
+ }
+
+ if (entries) {
+ uint64_t value = 0, flags = 0;
+
+ if (adev->asic_type >= CHIP_VEGA10) {
+ if (level != AMDGPU_VM_PTB) {
+ /* Handle leaf PDEs as PTEs */
+ flags |= AMDGPU_PDE_PTE;
+ amdgpu_gmc_get_vm_pde(adev, level,
+ &value, &flags);
+ } else {
+ /* Workaround for fault priority problem on GMC9 */
+ flags = AMDGPU_PTE_EXECUTABLE;
+ }
+ }
+
+ r = vm->update_funcs->update(¶ms, vmbo, addr, 0, entries,
+ value, flags);
+ if (r)
+ goto exit;
+ }
+
+ r = vm->update_funcs->commit(¶ms, NULL);
+exit:
+ drm_dev_exit(idx);
+ return r;
+}
+
+/**
+ * amdgpu_vm_pt_create - create bo for PD/PT
+ *
+ * @adev: amdgpu_device pointer
+ * @vm: requesting vm
+ * @level: the page table level
+ * @immediate: use a immediate update
+ * @vmbo: pointer to the buffer object pointer
+ */
+int amdgpu_vm_pt_create(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+ int level, bool immediate, struct amdgpu_bo_vm **vmbo)
+{
+ struct amdgpu_bo_param bp;
+ struct amdgpu_bo *bo;
+ struct dma_resv *resv;
+ unsigned int num_entries;
+ int r;
+
+ memset(&bp, 0, sizeof(bp));
+
+ bp.size = amdgpu_vm_pt_size(adev, level);
+ bp.byte_align = AMDGPU_GPU_PAGE_SIZE;
+ bp.domain = AMDGPU_GEM_DOMAIN_VRAM;
+ bp.domain = amdgpu_bo_get_preferred_domain(adev, bp.domain);
+ bp.flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
+ AMDGPU_GEM_CREATE_CPU_GTT_USWC;
+
+ if (level < AMDGPU_VM_PTB)
+ num_entries = amdgpu_vm_pt_num_entries(adev, level);
+ else
+ num_entries = 0;
+
+ bp.bo_ptr_size = struct_size((*vmbo), entries, num_entries);
+
+ if (vm->use_cpu_for_update)
+ bp.flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
+
+ bp.type = ttm_bo_type_kernel;
+ bp.no_wait_gpu = immediate;
+ if (vm->root.bo)
+ bp.resv = vm->root.bo->tbo.base.resv;
+
+ r = amdgpu_bo_create_vm(adev, &bp, vmbo);
+ if (r)
+ return r;
+
+ bo = &(*vmbo)->bo;
+ if (vm->is_compute_context || (adev->flags & AMD_IS_APU)) {
+ (*vmbo)->shadow = NULL;
+ return 0;
+ }
+
+ if (!bp.resv)
+ WARN_ON(dma_resv_lock(bo->tbo.base.resv,
+ NULL));
+ resv = bp.resv;
+ memset(&bp, 0, sizeof(bp));
+ bp.size = amdgpu_vm_pt_size(adev, level);
+ bp.domain = AMDGPU_GEM_DOMAIN_GTT;
+ bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC;
+ bp.type = ttm_bo_type_kernel;
+ bp.resv = bo->tbo.base.resv;
+ bp.bo_ptr_size = sizeof(struct amdgpu_bo);
+
+ r = amdgpu_bo_create(adev, &bp, &(*vmbo)->shadow);
+
+ if (!resv)
+ dma_resv_unlock(bo->tbo.base.resv);
+
+ if (r) {
+ amdgpu_bo_unref(&bo);
+ return r;
+ }
+
+ (*vmbo)->shadow->parent = amdgpu_bo_ref(bo);
+ amdgpu_bo_add_to_shadow_list(*vmbo);
+
+ return 0;
+}
+
+/**
+ * amdgpu_vm_pt_alloc - Allocate a specific page table
+ *
+ * @adev: amdgpu_device pointer
+ * @vm: VM to allocate page tables for
+ * @cursor: Which page table to allocate
+ * @immediate: use an immediate update
+ *
+ * Make sure a specific page table or directory is allocated.
+ *
+ * Returns:
+ * 1 if page table needed to be allocated, 0 if page table was already
+ * allocated, negative errno if an error occurred.
+ */
+static int amdgpu_vm_pt_alloc(struct amdgpu_device *adev,
+ struct amdgpu_vm *vm,
+ struct amdgpu_vm_pt_cursor *cursor,
+ bool immediate)
+{
+ struct amdgpu_vm_bo_base *entry = cursor->entry;
+ struct amdgpu_bo *pt_bo;
+ struct amdgpu_bo_vm *pt;
+ int r;
+
+ if (entry->bo)
+ return 0;
+
+ r = amdgpu_vm_pt_create(adev, vm, cursor->level, immediate, &pt);
+ if (r)
+ return r;
+
+ /* Keep a reference to the root directory to avoid
+ * freeing them up in the wrong order.
+ */
+ pt_bo = &pt->bo;
+ pt_bo->parent = amdgpu_bo_ref(cursor->parent->bo);
+ amdgpu_vm_bo_base_init(entry, vm, pt_bo);
+ r = amdgpu_vm_pt_clear(adev, vm, pt, immediate);
+ if (r)
+ goto error_free_pt;
+
+ return 0;
+
+error_free_pt:
+ amdgpu_bo_unref(&pt->shadow);
+ amdgpu_bo_unref(&pt_bo);
+ return r;
+}
+
+/**
+ * amdgpu_vm_free_table - fre one PD/PT
+ *
+ * @entry: PDE to free
+ */
+static void amdgpu_vm_pt_free(struct amdgpu_vm_bo_base *entry)
+{
+ struct amdgpu_bo *shadow;
+
+ if (!entry->bo)
+ return;
+ shadow = amdgpu_bo_shadowed(entry->bo);
+ entry->bo->vm_bo = NULL;
+ list_del(&entry->vm_status);
+ amdgpu_bo_unref(&shadow);
+ amdgpu_bo_unref(&entry->bo);
+}
+
+/**
+ * amdgpu_vm_pt_free_dfs - free PD/PT levels
+ *
+ * @adev: amdgpu device structure
+ * @vm: amdgpu vm structure
+ * @start: optional cursor where to start freeing PDs/PTs
+ *
+ * Free the page directory or page table level and all sub levels.
+ */
+static void amdgpu_vm_pt_free_dfs(struct amdgpu_device *adev,
+ struct amdgpu_vm *vm,
+ struct amdgpu_vm_pt_cursor *start)
+{
+ struct amdgpu_vm_pt_cursor cursor;
+ struct amdgpu_vm_bo_base *entry;
+
+ vm->bulk_moveable = false;
+
+ for_each_amdgpu_vm_pt_dfs_safe(adev, vm, start, cursor, entry)
+ amdgpu_vm_pt_free(entry);
+
+ if (start)
+ amdgpu_vm_pt_free(start->entry);
+}
+
+/**
+ * amdgpu_vm_pt_free_root - free root PD
+ * @adev: amdgpu device structure
+ * @vm: amdgpu vm structure
+ *
+ * Free the root page directory and everything below it.
+ */
+void amdgpu_vm_pt_free_root(struct amdgpu_device *adev, struct amdgpu_vm *vm)
+{
+ amdgpu_vm_pt_free_dfs(adev, vm, NULL);
+}
+
+/**
+ * amdgpu_vm_pt_is_root_clean - check if a root PD is clean
+ *
+ * @adev: amdgpu_device pointer
+ * @vm: the VM to check
+ *
+ * Check all entries of the root PD, if any subsequent PDs are allocated,
+ * it means there are page table creating and filling, and is no a clean
+ * VM
+ *
+ * Returns:
+ * 0 if this VM is clean
+ */
+bool amdgpu_vm_pt_is_root_clean(struct amdgpu_device *adev,
+ struct amdgpu_vm *vm)
+{
+ enum amdgpu_vm_level root = adev->vm_manager.root_level;
+ unsigned int entries = amdgpu_vm_pt_num_entries(adev, root);
+ unsigned int i = 0;
+
+ for (i = 0; i < entries; i++) {
+ if (to_amdgpu_bo_vm(vm->root.bo)->entries[i].bo)
+ return false;
+ }
+ return true;
+}
+
+/**
+ * amdgpu_vm_pde_update - update a single level in the hierarchy
+ *
+ * @params: parameters for the update
+ * @entry: entry to update
+ *
+ * Makes sure the requested entry in parent is up to date.
+ */
+int amdgpu_vm_pde_update(struct amdgpu_vm_update_params *params,
+ struct amdgpu_vm_bo_base *entry)
+{
+ struct amdgpu_vm_bo_base *parent = amdgpu_vm_pt_parent(entry);
+ struct amdgpu_bo *bo = parent->bo, *pbo;
+ struct amdgpu_vm *vm = params->vm;
+ uint64_t pde, pt, flags;
+ unsigned int level;
+
+ for (level = 0, pbo = bo->parent; pbo; ++level)
+ pbo = pbo->parent;
+
+ level += params->adev->vm_manager.root_level;
+ amdgpu_gmc_get_pde_for_bo(entry->bo, level, &pt, &flags);
+ pde = (entry - to_amdgpu_bo_vm(parent->bo)->entries) * 8;
+ return vm->update_funcs->update(params, to_amdgpu_bo_vm(bo), pde, pt,
+ 1, 0, flags);
+}
+
+/*
+ * amdgpu_vm_pte_update_flags - figure out flags for PTE updates
+ *
+ * Make sure to set the right flags for the PTEs at the desired level.
+ */
+static void amdgpu_vm_pte_update_flags(struct amdgpu_vm_update_params *params,
+ struct amdgpu_bo_vm *pt,
+ unsigned int level,
+ uint64_t pe, uint64_t addr,
+ unsigned int count, uint32_t incr,
+ uint64_t flags)
+
+{
+ if (level != AMDGPU_VM_PTB) {
+ flags |= AMDGPU_PDE_PTE;
+ amdgpu_gmc_get_vm_pde(params->adev, level, &addr, &flags);
+
+ } else if (params->adev->asic_type >= CHIP_VEGA10 &&
+ !(flags & AMDGPU_PTE_VALID) &&
+ !(flags & AMDGPU_PTE_PRT)) {
+
+ /* Workaround for fault priority problem on GMC9 */
+ flags |= AMDGPU_PTE_EXECUTABLE;
+ }
+
+ params->vm->update_funcs->update(params, pt, pe, addr, count, incr,
+ flags);
+}
+
+/**
+ * amdgpu_vm_pte_fragment - get fragment for PTEs
+ *
+ * @params: see amdgpu_vm_update_params definition
+ * @start: first PTE to handle
+ * @end: last PTE to handle
+ * @flags: hw mapping flags
+ * @frag: resulting fragment size
+ * @frag_end: end of this fragment
+ *
+ * Returns the first possible fragment for the start and end address.
+ */
+static void amdgpu_vm_pte_fragment(struct amdgpu_vm_update_params *params,
+ uint64_t start, uint64_t end, uint64_t flags,
+ unsigned int *frag, uint64_t *frag_end)
+{
+ /**
+ * The MC L1 TLB supports variable sized pages, based on a fragment
+ * field in the PTE. When this field is set to a non-zero value, page
+ * granularity is increased from 4KB to (1 << (12 + frag)). The PTE
+ * flags are considered valid for all PTEs within the fragment range
+ * and corresponding mappings are assumed to be physically contiguous.
+ *
+ * The L1 TLB can store a single PTE for the whole fragment,
+ * significantly increasing the space available for translation
+ * caching. This leads to large improvements in throughput when the
+ * TLB is under pressure.
+ *
+ * The L2 TLB distributes small and large fragments into two
+ * asymmetric partitions. The large fragment cache is significantly
+ * larger. Thus, we try to use large fragments wherever possible.
+ * Userspace can support this by aligning virtual base address and
+ * allocation size to the fragment size.
+ *
+ * Starting with Vega10 the fragment size only controls the L1. The L2
+ * is now directly feed with small/huge/giant pages from the walker.
+ */
+ unsigned int max_frag;
+
+ if (params->adev->asic_type < CHIP_VEGA10)
+ max_frag = params->adev->vm_manager.fragment_size;
+ else
+ max_frag = 31;
+
+ /* system pages are non continuously */
+ if (params->pages_addr) {
+ *frag = 0;
+ *frag_end = end;
+ return;
+ }
+
+ /* This intentionally wraps around if no bit is set */
+ *frag = min_t(unsigned int, ffs(start) - 1, fls64(end - start) - 1);
+ if (*frag >= max_frag) {
+ *frag = max_frag;
+ *frag_end = end & ~((1ULL << max_frag) - 1);
+ } else {
+ *frag_end = start + (1 << *frag);
+ }
+}
+
+/**
+ * amdgpu_vm_ptes_update - make sure that page tables are valid
+ *
+ * @params: see amdgpu_vm_update_params definition
+ * @start: start of GPU address range
+ * @end: end of GPU address range
+ * @dst: destination address to map to, the next dst inside the function
+ * @flags: mapping flags
+ *
+ * Update the page tables in the range @start - @end.
+ *
+ * Returns:
+ * 0 for success, -EINVAL for failure.
+ */
+int amdgpu_vm_ptes_update(struct amdgpu_vm_update_params *params,
+ uint64_t start, uint64_t end,
+ uint64_t dst, uint64_t flags)
+{
+ struct amdgpu_device *adev = params->adev;
+ struct amdgpu_vm_pt_cursor cursor;
+ uint64_t frag_start = start, frag_end;
+ unsigned int frag;
+ int r;
+
+ /* figure out the initial fragment */
+ amdgpu_vm_pte_fragment(params, frag_start, end, flags, &frag,
+ &frag_end);
+
+ /* walk over the address space and update the PTs */
+ amdgpu_vm_pt_start(adev, params->vm, start, &cursor);
+ while (cursor.pfn < end) {
+ unsigned int shift, parent_shift, mask;
+ uint64_t incr, entry_end, pe_start;
+ struct amdgpu_bo *pt;
+
+ if (!params->unlocked) {
+ /* make sure that the page tables covering the
+ * address range are actually allocated
+ */
+ r = amdgpu_vm_pt_alloc(params->adev, params->vm,
+ &cursor, params->immediate);
+ if (r)
+ return r;
+ }
+
+ shift = amdgpu_vm_pt_level_shift(adev, cursor.level);
+ parent_shift = amdgpu_vm_pt_level_shift(adev, cursor.level - 1);
+ if (params->unlocked) {
+ /* Unlocked updates are only allowed on the leaves */
+ if (amdgpu_vm_pt_descendant(adev, &cursor))
+ continue;
+ } else if (adev->asic_type < CHIP_VEGA10 &&
+ (flags & AMDGPU_PTE_VALID)) {
+ /* No huge page support before GMC v9 */
+ if (cursor.level != AMDGPU_VM_PTB) {
+ if (!amdgpu_vm_pt_descendant(adev, &cursor))
+ return -ENOENT;
+ continue;
+ }
+ } else if (frag < shift) {
+ /* We can't use this level when the fragment size is
+ * smaller than the address shift. Go to the next
+ * child entry and try again.
+ */
+ if (amdgpu_vm_pt_descendant(adev, &cursor))
+ continue;
+ } else if (frag >= parent_shift) {
+ /* If the fragment size is even larger than the parent
+ * shift we should go up one level and check it again.
+ */
+ if (!amdgpu_vm_pt_ancestor(&cursor))
+ return -EINVAL;
+ continue;
+ }
+
+ pt = cursor.entry->bo;
+ if (!pt) {
+ /* We need all PDs and PTs for mapping something, */
+ if (flags & AMDGPU_PTE_VALID)
+ return -ENOENT;
+
+ /* but unmapping something can happen at a higher
+ * level.
+ */
+ if (!amdgpu_vm_pt_ancestor(&cursor))
+ return -EINVAL;
+
+ pt = cursor.entry->bo;
+ shift = parent_shift;
+ frag_end = max(frag_end, ALIGN(frag_start + 1,
+ 1ULL << shift));
+ }
+
+ /* Looks good so far, calculate parameters for the update */
+ incr = (uint64_t)AMDGPU_GPU_PAGE_SIZE << shift;
+ mask = amdgpu_vm_pt_entries_mask(adev, cursor.level);
+ pe_start = ((cursor.pfn >> shift) & mask) * 8;
+ entry_end = ((uint64_t)mask + 1) << shift;
+ entry_end += cursor.pfn & ~(entry_end - 1);
+ entry_end = min(entry_end, end);
+
+ do {
+ struct amdgpu_vm *vm = params->vm;
+ uint64_t upd_end = min(entry_end, frag_end);
+ unsigned int nptes = (upd_end - frag_start) >> shift;
+ uint64_t upd_flags = flags | AMDGPU_PTE_FRAG(frag);
+
+ /* This can happen when we set higher level PDs to
+ * silent to stop fault floods.
+ */
+ nptes = max(nptes, 1u);
+
+ trace_amdgpu_vm_update_ptes(params, frag_start, upd_end,
+ min(nptes, 32u), dst, incr,
+ upd_flags,
+ vm->task_info.pid,
+ vm->immediate.fence_context);
+ amdgpu_vm_pte_update_flags(params, to_amdgpu_bo_vm(pt),
+ cursor.level, pe_start, dst,
+ nptes, incr, upd_flags);
+
+ pe_start += nptes * 8;
+ dst += nptes * incr;
+
+ frag_start = upd_end;
+ if (frag_start >= frag_end) {
+ /* figure out the next fragment */
+ amdgpu_vm_pte_fragment(params, frag_start, end,
+ flags, &frag, &frag_end);
+ if (frag < shift)
+ break;
+ }
+ } while (frag_start < entry_end);
+
+ if (amdgpu_vm_pt_descendant(adev, &cursor)) {
+ /* Free all child entries.
+ * Update the tables with the flags and addresses and free up subsequent
+ * tables in the case of huge pages or freed up areas.
+ * This is the maximum you can free, because all other page tables are not
+ * completely covered by the range and so potentially still in use.
+ */
+ while (cursor.pfn < frag_start) {
+ /* Make sure previous mapping is freed */
+ if (cursor.entry->bo) {
+ params->table_freed = true;
+ amdgpu_vm_pt_free_dfs(adev, params->vm,
+ &cursor);
+ }
+ amdgpu_vm_pt_next(adev, &cursor);
+ }
+
+ } else if (frag >= shift) {
+ /* or just move on to the next on the same level. */
+ amdgpu_vm_pt_next(adev, &cursor);
+ }
+ }
+
+ return 0;
+}
--
2.25.1
