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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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769f846e14
The function was modified without updating the documentation. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Huang Rui <ray.huang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
3504 lines
87 KiB
C
3504 lines
87 KiB
C
/*
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* Copyright 2008 Advanced Micro Devices, Inc.
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* Copyright 2008 Red Hat Inc.
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* Copyright 2009 Jerome Glisse.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Dave Airlie
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* Alex Deucher
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* Jerome Glisse
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*/
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#include <linux/dma-fence-array.h>
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#include <linux/interval_tree_generic.h>
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#include <linux/idr.h>
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#include <drm/drmP.h>
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#include <drm/amdgpu_drm.h>
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#include "amdgpu.h"
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#include "amdgpu_trace.h"
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#include "amdgpu_amdkfd.h"
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#include "amdgpu_gmc.h"
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/**
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* DOC: GPUVM
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*
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* GPUVM is similar to the legacy gart on older asics, however
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* rather than there being a single global gart table
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* for the entire GPU, there are multiple VM page tables active
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* at any given time. The VM page tables can contain a mix
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* vram pages and system memory pages and system memory pages
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* can be mapped as snooped (cached system pages) or unsnooped
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* (uncached system pages).
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* Each VM has an ID associated with it and there is a page table
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* associated with each VMID. When execting a command buffer,
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* the kernel tells the the ring what VMID to use for that command
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* buffer. VMIDs are allocated dynamically as commands are submitted.
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* The userspace drivers maintain their own address space and the kernel
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* sets up their pages tables accordingly when they submit their
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* command buffers and a VMID is assigned.
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* Cayman/Trinity support up to 8 active VMs at any given time;
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* SI supports 16.
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*/
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#define START(node) ((node)->start)
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#define LAST(node) ((node)->last)
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INTERVAL_TREE_DEFINE(struct amdgpu_bo_va_mapping, rb, uint64_t, __subtree_last,
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START, LAST, static, amdgpu_vm_it)
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#undef START
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#undef LAST
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/**
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* struct amdgpu_pte_update_params - Local structure
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*
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* Encapsulate some VM table update parameters to reduce
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* the number of function parameters
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*
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*/
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struct amdgpu_pte_update_params {
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/**
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* @adev: amdgpu device we do this update for
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*/
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struct amdgpu_device *adev;
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/**
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* @vm: optional amdgpu_vm we do this update for
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*/
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struct amdgpu_vm *vm;
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/**
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* @src: address where to copy page table entries from
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*/
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uint64_t src;
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/**
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* @ib: indirect buffer to fill with commands
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*/
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struct amdgpu_ib *ib;
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/**
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* @func: Function which actually does the update
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*/
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void (*func)(struct amdgpu_pte_update_params *params,
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struct amdgpu_bo *bo, uint64_t pe,
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uint64_t addr, unsigned count, uint32_t incr,
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uint64_t flags);
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/**
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* @pages_addr:
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*
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* DMA addresses to use for mapping, used during VM update by CPU
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*/
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dma_addr_t *pages_addr;
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/**
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* @kptr:
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*
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* Kernel pointer of PD/PT BO that needs to be updated,
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* used during VM update by CPU
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*/
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void *kptr;
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};
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/**
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* struct amdgpu_prt_cb - Helper to disable partial resident texture feature from a fence callback
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*/
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struct amdgpu_prt_cb {
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/**
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* @adev: amdgpu device
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*/
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struct amdgpu_device *adev;
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/**
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* @cb: callback
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*/
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struct dma_fence_cb cb;
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};
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/**
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* amdgpu_vm_level_shift - return the addr shift for each level
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*
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* @adev: amdgpu_device pointer
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* @level: VMPT level
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*
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* Returns:
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* The number of bits the pfn needs to be right shifted for a level.
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*/
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static unsigned amdgpu_vm_level_shift(struct amdgpu_device *adev,
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unsigned level)
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{
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unsigned shift = 0xff;
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switch (level) {
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case AMDGPU_VM_PDB2:
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case AMDGPU_VM_PDB1:
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case AMDGPU_VM_PDB0:
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shift = 9 * (AMDGPU_VM_PDB0 - level) +
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adev->vm_manager.block_size;
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break;
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case AMDGPU_VM_PTB:
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shift = 0;
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break;
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default:
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dev_err(adev->dev, "the level%d isn't supported.\n", level);
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}
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return shift;
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}
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/**
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* amdgpu_vm_num_entries - return the number of entries in a PD/PT
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*
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* @adev: amdgpu_device pointer
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* @level: VMPT level
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*
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* Returns:
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* The number of entries in a page directory or page table.
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*/
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static unsigned amdgpu_vm_num_entries(struct amdgpu_device *adev,
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unsigned level)
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{
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unsigned shift = amdgpu_vm_level_shift(adev,
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adev->vm_manager.root_level);
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if (level == adev->vm_manager.root_level)
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/* For the root directory */
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return round_up(adev->vm_manager.max_pfn, 1 << shift) >> shift;
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else if (level != AMDGPU_VM_PTB)
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/* Everything in between */
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return 512;
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else
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/* For the page tables on the leaves */
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return AMDGPU_VM_PTE_COUNT(adev);
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}
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/**
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* amdgpu_vm_entries_mask - the mask to get the entry number of a PD/PT
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*
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* @adev: amdgpu_device pointer
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* @level: VMPT level
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*
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* Returns:
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* The mask to extract the entry number of a PD/PT from an address.
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*/
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static uint32_t amdgpu_vm_entries_mask(struct amdgpu_device *adev,
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unsigned int level)
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{
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if (level <= adev->vm_manager.root_level)
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return 0xffffffff;
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else if (level != AMDGPU_VM_PTB)
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return 0x1ff;
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else
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return AMDGPU_VM_PTE_COUNT(adev) - 1;
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}
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/**
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* amdgpu_vm_bo_size - returns the size of the BOs in bytes
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*
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* @adev: amdgpu_device pointer
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* @level: VMPT level
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*
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* Returns:
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* The size of the BO for a page directory or page table in bytes.
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*/
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static unsigned amdgpu_vm_bo_size(struct amdgpu_device *adev, unsigned level)
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{
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return AMDGPU_GPU_PAGE_ALIGN(amdgpu_vm_num_entries(adev, level) * 8);
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}
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/**
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* amdgpu_vm_bo_evicted - vm_bo is evicted
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*
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* @vm_bo: vm_bo which is evicted
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*
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* State for PDs/PTs and per VM BOs which are not at the location they should
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* be.
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*/
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static void amdgpu_vm_bo_evicted(struct amdgpu_vm_bo_base *vm_bo)
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{
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struct amdgpu_vm *vm = vm_bo->vm;
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struct amdgpu_bo *bo = vm_bo->bo;
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vm_bo->moved = true;
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if (bo->tbo.type == ttm_bo_type_kernel)
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list_move(&vm_bo->vm_status, &vm->evicted);
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else
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list_move_tail(&vm_bo->vm_status, &vm->evicted);
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}
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/**
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* amdgpu_vm_bo_relocated - vm_bo is reloacted
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*
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* @vm_bo: vm_bo which is relocated
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*
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* State for PDs/PTs which needs to update their parent PD.
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*/
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static void amdgpu_vm_bo_relocated(struct amdgpu_vm_bo_base *vm_bo)
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{
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list_move(&vm_bo->vm_status, &vm_bo->vm->relocated);
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}
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/**
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* amdgpu_vm_bo_moved - vm_bo is moved
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*
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* @vm_bo: vm_bo which is moved
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*
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* State for per VM BOs which are moved, but that change is not yet reflected
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* in the page tables.
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*/
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static void amdgpu_vm_bo_moved(struct amdgpu_vm_bo_base *vm_bo)
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{
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list_move(&vm_bo->vm_status, &vm_bo->vm->moved);
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}
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/**
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* amdgpu_vm_bo_idle - vm_bo is idle
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*
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* @vm_bo: vm_bo which is now idle
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*
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* State for PDs/PTs and per VM BOs which have gone through the state machine
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* and are now idle.
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*/
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static void amdgpu_vm_bo_idle(struct amdgpu_vm_bo_base *vm_bo)
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{
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list_move(&vm_bo->vm_status, &vm_bo->vm->idle);
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vm_bo->moved = false;
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}
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/**
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* amdgpu_vm_bo_invalidated - vm_bo is invalidated
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*
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* @vm_bo: vm_bo which is now invalidated
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*
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* State for normal BOs which are invalidated and that change not yet reflected
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* in the PTs.
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*/
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static void amdgpu_vm_bo_invalidated(struct amdgpu_vm_bo_base *vm_bo)
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{
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spin_lock(&vm_bo->vm->invalidated_lock);
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list_move(&vm_bo->vm_status, &vm_bo->vm->invalidated);
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spin_unlock(&vm_bo->vm->invalidated_lock);
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}
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/**
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* amdgpu_vm_bo_done - vm_bo is done
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*
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* @vm_bo: vm_bo which is now done
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*
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* State for normal BOs which are invalidated and that change has been updated
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* in the PTs.
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*/
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static void amdgpu_vm_bo_done(struct amdgpu_vm_bo_base *vm_bo)
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{
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spin_lock(&vm_bo->vm->invalidated_lock);
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list_del_init(&vm_bo->vm_status);
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spin_unlock(&vm_bo->vm->invalidated_lock);
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}
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/**
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* amdgpu_vm_bo_base_init - Adds bo to the list of bos associated with the vm
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*
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* @base: base structure for tracking BO usage in a VM
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* @vm: vm to which bo is to be added
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* @bo: amdgpu buffer object
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*
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* Initialize a bo_va_base structure and add it to the appropriate lists
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*
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*/
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static void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base,
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struct amdgpu_vm *vm,
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struct amdgpu_bo *bo)
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{
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base->vm = vm;
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base->bo = bo;
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base->next = NULL;
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INIT_LIST_HEAD(&base->vm_status);
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if (!bo)
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return;
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base->next = bo->vm_bo;
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bo->vm_bo = base;
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if (bo->tbo.resv != vm->root.base.bo->tbo.resv)
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return;
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vm->bulk_moveable = false;
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if (bo->tbo.type == ttm_bo_type_kernel)
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amdgpu_vm_bo_relocated(base);
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else
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amdgpu_vm_bo_idle(base);
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if (bo->preferred_domains &
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amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type))
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return;
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/*
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* we checked all the prerequisites, but it looks like this per vm bo
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* is currently evicted. add the bo to the evicted list to make sure it
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* is validated on next vm use to avoid fault.
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* */
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amdgpu_vm_bo_evicted(base);
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}
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/**
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* amdgpu_vm_pt_parent - get the parent page directory
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*
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* @pt: child page table
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*
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* Helper to get the parent entry for the child page table. NULL if we are at
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* the root page directory.
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*/
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static struct amdgpu_vm_pt *amdgpu_vm_pt_parent(struct amdgpu_vm_pt *pt)
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{
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struct amdgpu_bo *parent = pt->base.bo->parent;
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if (!parent)
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return NULL;
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return container_of(parent->vm_bo, struct amdgpu_vm_pt, base);
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}
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/**
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* amdgpu_vm_pt_cursor - state for for_each_amdgpu_vm_pt
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*/
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struct amdgpu_vm_pt_cursor {
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uint64_t pfn;
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struct amdgpu_vm_pt *parent;
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struct amdgpu_vm_pt *entry;
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unsigned level;
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};
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/**
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* amdgpu_vm_pt_start - start PD/PT walk
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*
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* @adev: amdgpu_device pointer
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* @vm: amdgpu_vm structure
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* @start: start address of the walk
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* @cursor: state to initialize
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*
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* Initialize a amdgpu_vm_pt_cursor to start a walk.
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*/
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static void amdgpu_vm_pt_start(struct amdgpu_device *adev,
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struct amdgpu_vm *vm, uint64_t start,
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struct amdgpu_vm_pt_cursor *cursor)
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{
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cursor->pfn = start;
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cursor->parent = NULL;
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cursor->entry = &vm->root;
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cursor->level = adev->vm_manager.root_level;
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}
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/**
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* amdgpu_vm_pt_descendant - go to child node
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*
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* @adev: amdgpu_device pointer
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* @cursor: current state
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*
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* Walk to the child node of the current node.
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* Returns:
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* True if the walk was possible, false otherwise.
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*/
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static bool amdgpu_vm_pt_descendant(struct amdgpu_device *adev,
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struct amdgpu_vm_pt_cursor *cursor)
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{
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unsigned mask, shift, idx;
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if (!cursor->entry->entries)
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return false;
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BUG_ON(!cursor->entry->base.bo);
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mask = amdgpu_vm_entries_mask(adev, cursor->level);
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shift = amdgpu_vm_level_shift(adev, cursor->level);
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++cursor->level;
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idx = (cursor->pfn >> shift) & mask;
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cursor->parent = cursor->entry;
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cursor->entry = &cursor->entry->entries[idx];
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return true;
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}
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/**
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* amdgpu_vm_pt_sibling - go to sibling node
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*
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* @adev: amdgpu_device pointer
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* @cursor: current state
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*
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* Walk to the sibling node of the current node.
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* Returns:
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* True if the walk was possible, false otherwise.
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*/
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static bool amdgpu_vm_pt_sibling(struct amdgpu_device *adev,
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struct amdgpu_vm_pt_cursor *cursor)
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{
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unsigned shift, num_entries;
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/* Root doesn't have a sibling */
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if (!cursor->parent)
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return false;
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/* Go to our parents and see if we got a sibling */
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shift = amdgpu_vm_level_shift(adev, cursor->level - 1);
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num_entries = amdgpu_vm_num_entries(adev, cursor->level - 1);
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if (cursor->entry == &cursor->parent->entries[num_entries - 1])
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return false;
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cursor->pfn += 1ULL << shift;
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cursor->pfn &= ~((1ULL << shift) - 1);
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++cursor->entry;
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return true;
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}
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/**
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* amdgpu_vm_pt_ancestor - go to parent node
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*
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* @cursor: current state
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*
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* Walk to the parent node of the current node.
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* Returns:
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* True if the walk was possible, false otherwise.
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*/
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static bool amdgpu_vm_pt_ancestor(struct amdgpu_vm_pt_cursor *cursor)
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{
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if (!cursor->parent)
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return false;
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--cursor->level;
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cursor->entry = cursor->parent;
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cursor->parent = amdgpu_vm_pt_parent(cursor->parent);
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return true;
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}
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/**
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* amdgpu_vm_pt_next - get next PD/PT in hieratchy
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*
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* @adev: amdgpu_device pointer
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* @cursor: current state
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*
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* Walk the PD/PT tree to the next node.
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*/
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static void amdgpu_vm_pt_next(struct amdgpu_device *adev,
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struct amdgpu_vm_pt_cursor *cursor)
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{
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/* First try a newborn child */
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if (amdgpu_vm_pt_descendant(adev, cursor))
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return;
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/* If that didn't worked try to find a sibling */
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while (!amdgpu_vm_pt_sibling(adev, cursor)) {
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/* No sibling, go to our parents and grandparents */
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if (!amdgpu_vm_pt_ancestor(cursor)) {
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cursor->pfn = ~0ll;
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return;
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}
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}
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}
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/**
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* amdgpu_vm_pt_first_leaf - get first leaf PD/PT
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*
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* @adev: amdgpu_device pointer
|
|
* @vm: amdgpu_vm structure
|
|
* @start: start addr of the walk
|
|
* @cursor: state to initialize
|
|
*
|
|
* Start a walk and go directly to the leaf node.
|
|
*/
|
|
static void amdgpu_vm_pt_first_leaf(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm, uint64_t start,
|
|
struct amdgpu_vm_pt_cursor *cursor)
|
|
{
|
|
amdgpu_vm_pt_start(adev, vm, start, cursor);
|
|
while (amdgpu_vm_pt_descendant(adev, cursor));
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_pt_next_leaf - get next leaf PD/PT
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @cursor: current state
|
|
*
|
|
* Walk the PD/PT tree to the next leaf node.
|
|
*/
|
|
static void amdgpu_vm_pt_next_leaf(struct amdgpu_device *adev,
|
|
struct amdgpu_vm_pt_cursor *cursor)
|
|
{
|
|
amdgpu_vm_pt_next(adev, cursor);
|
|
while (amdgpu_vm_pt_descendant(adev, cursor));
|
|
}
|
|
|
|
/**
|
|
* for_each_amdgpu_vm_pt_leaf - walk over all leaf PDs/PTs in the hierarchy
|
|
*/
|
|
#define for_each_amdgpu_vm_pt_leaf(adev, vm, start, end, cursor) \
|
|
for (amdgpu_vm_pt_first_leaf((adev), (vm), (start), &(cursor)); \
|
|
(cursor).pfn <= end; amdgpu_vm_pt_next_leaf((adev), &(cursor)))
|
|
|
|
/**
|
|
* amdgpu_vm_pt_first_dfs - start a deep first search
|
|
*
|
|
* @adev: amdgpu_device structure
|
|
* @vm: amdgpu_vm structure
|
|
* @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 *cursor)
|
|
{
|
|
amdgpu_vm_pt_start(adev, vm, 0, cursor);
|
|
while (amdgpu_vm_pt_descendant(adev, cursor));
|
|
}
|
|
|
|
/**
|
|
* 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, cursor, entry) \
|
|
for (amdgpu_vm_pt_first_dfs((adev), (vm), &(cursor)), \
|
|
(entry) = (cursor).entry, amdgpu_vm_pt_next_dfs((adev), &(cursor));\
|
|
(entry); (entry) = (cursor).entry, \
|
|
amdgpu_vm_pt_next_dfs((adev), &(cursor)))
|
|
|
|
/**
|
|
* amdgpu_vm_get_pd_bo - add the VM PD to a validation list
|
|
*
|
|
* @vm: vm providing the BOs
|
|
* @validated: head of validation list
|
|
* @entry: entry to add
|
|
*
|
|
* Add the page directory to the list of BOs to
|
|
* validate for command submission.
|
|
*/
|
|
void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
|
|
struct list_head *validated,
|
|
struct amdgpu_bo_list_entry *entry)
|
|
{
|
|
entry->priority = 0;
|
|
entry->tv.bo = &vm->root.base.bo->tbo;
|
|
entry->tv.shared = true;
|
|
entry->user_pages = NULL;
|
|
list_add(&entry->tv.head, validated);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_move_to_lru_tail - move all BOs to the end of LRU
|
|
*
|
|
* @adev: amdgpu device pointer
|
|
* @vm: vm providing the BOs
|
|
*
|
|
* Move all BOs to the end of LRU and remember their positions to put them
|
|
* together.
|
|
*/
|
|
void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm)
|
|
{
|
|
struct ttm_bo_global *glob = adev->mman.bdev.glob;
|
|
struct amdgpu_vm_bo_base *bo_base;
|
|
|
|
if (vm->bulk_moveable) {
|
|
spin_lock(&glob->lru_lock);
|
|
ttm_bo_bulk_move_lru_tail(&vm->lru_bulk_move);
|
|
spin_unlock(&glob->lru_lock);
|
|
return;
|
|
}
|
|
|
|
memset(&vm->lru_bulk_move, 0, sizeof(vm->lru_bulk_move));
|
|
|
|
spin_lock(&glob->lru_lock);
|
|
list_for_each_entry(bo_base, &vm->idle, vm_status) {
|
|
struct amdgpu_bo *bo = bo_base->bo;
|
|
|
|
if (!bo->parent)
|
|
continue;
|
|
|
|
ttm_bo_move_to_lru_tail(&bo->tbo, &vm->lru_bulk_move);
|
|
if (bo->shadow)
|
|
ttm_bo_move_to_lru_tail(&bo->shadow->tbo,
|
|
&vm->lru_bulk_move);
|
|
}
|
|
spin_unlock(&glob->lru_lock);
|
|
|
|
vm->bulk_moveable = true;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_validate_pt_bos - validate the page table BOs
|
|
*
|
|
* @adev: amdgpu device pointer
|
|
* @vm: vm providing the BOs
|
|
* @validate: callback to do the validation
|
|
* @param: parameter for the validation callback
|
|
*
|
|
* Validate the page table BOs on command submission if neccessary.
|
|
*
|
|
* Returns:
|
|
* Validation result.
|
|
*/
|
|
int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
|
|
int (*validate)(void *p, struct amdgpu_bo *bo),
|
|
void *param)
|
|
{
|
|
struct amdgpu_vm_bo_base *bo_base, *tmp;
|
|
int r = 0;
|
|
|
|
vm->bulk_moveable &= list_empty(&vm->evicted);
|
|
|
|
list_for_each_entry_safe(bo_base, tmp, &vm->evicted, vm_status) {
|
|
struct amdgpu_bo *bo = bo_base->bo;
|
|
|
|
r = validate(param, bo);
|
|
if (r)
|
|
break;
|
|
|
|
if (bo->tbo.type != ttm_bo_type_kernel) {
|
|
amdgpu_vm_bo_moved(bo_base);
|
|
} else {
|
|
if (vm->use_cpu_for_update)
|
|
r = amdgpu_bo_kmap(bo, NULL);
|
|
else
|
|
r = amdgpu_ttm_alloc_gart(&bo->tbo);
|
|
if (r)
|
|
break;
|
|
if (bo->shadow) {
|
|
r = amdgpu_ttm_alloc_gart(&bo->shadow->tbo);
|
|
if (r)
|
|
break;
|
|
}
|
|
amdgpu_vm_bo_relocated(bo_base);
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_ready - check VM is ready for updates
|
|
*
|
|
* @vm: VM to check
|
|
*
|
|
* Check if all VM PDs/PTs are ready for updates
|
|
*
|
|
* Returns:
|
|
* True if eviction list is empty.
|
|
*/
|
|
bool amdgpu_vm_ready(struct amdgpu_vm *vm)
|
|
{
|
|
return list_empty(&vm->evicted);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_clear_bo - initially clear the PDs/PTs
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: VM to clear BO from
|
|
* @bo: BO to clear
|
|
* @level: level this BO is at
|
|
* @pte_support_ats: indicate ATS support from PTE
|
|
*
|
|
* 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 *bo,
|
|
unsigned level, bool pte_support_ats)
|
|
{
|
|
struct ttm_operation_ctx ctx = { true, false };
|
|
struct dma_fence *fence = NULL;
|
|
unsigned entries, ats_entries;
|
|
struct amdgpu_ring *ring;
|
|
struct amdgpu_job *job;
|
|
uint64_t addr;
|
|
int r;
|
|
|
|
entries = amdgpu_bo_size(bo) / 8;
|
|
|
|
if (pte_support_ats) {
|
|
if (level == adev->vm_manager.root_level) {
|
|
ats_entries = amdgpu_vm_level_shift(adev, level);
|
|
ats_entries += AMDGPU_GPU_PAGE_SHIFT;
|
|
ats_entries = AMDGPU_GMC_HOLE_START >> ats_entries;
|
|
ats_entries = min(ats_entries, entries);
|
|
entries -= ats_entries;
|
|
} else {
|
|
ats_entries = entries;
|
|
entries = 0;
|
|
}
|
|
} else {
|
|
ats_entries = 0;
|
|
}
|
|
|
|
ring = container_of(vm->entity.rq->sched, struct amdgpu_ring, sched);
|
|
|
|
r = reservation_object_reserve_shared(bo->tbo.resv);
|
|
if (r)
|
|
return r;
|
|
|
|
r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
|
|
if (r)
|
|
goto error;
|
|
|
|
r = amdgpu_ttm_alloc_gart(&bo->tbo);
|
|
if (r)
|
|
return r;
|
|
|
|
r = amdgpu_job_alloc_with_ib(adev, 64, &job);
|
|
if (r)
|
|
goto error;
|
|
|
|
addr = amdgpu_bo_gpu_offset(bo);
|
|
if (ats_entries) {
|
|
uint64_t ats_value;
|
|
|
|
ats_value = AMDGPU_PTE_DEFAULT_ATC;
|
|
if (level != AMDGPU_VM_PTB)
|
|
ats_value |= AMDGPU_PDE_PTE;
|
|
|
|
amdgpu_vm_set_pte_pde(adev, &job->ibs[0], addr, 0,
|
|
ats_entries, 0, ats_value);
|
|
addr += ats_entries * 8;
|
|
}
|
|
|
|
if (entries)
|
|
amdgpu_vm_set_pte_pde(adev, &job->ibs[0], addr, 0,
|
|
entries, 0, 0);
|
|
|
|
amdgpu_ring_pad_ib(ring, &job->ibs[0]);
|
|
|
|
WARN_ON(job->ibs[0].length_dw > 64);
|
|
r = amdgpu_sync_resv(adev, &job->sync, bo->tbo.resv,
|
|
AMDGPU_FENCE_OWNER_UNDEFINED, false);
|
|
if (r)
|
|
goto error_free;
|
|
|
|
r = amdgpu_job_submit(job, &vm->entity, AMDGPU_FENCE_OWNER_UNDEFINED,
|
|
&fence);
|
|
if (r)
|
|
goto error_free;
|
|
|
|
amdgpu_bo_fence(bo, fence, true);
|
|
dma_fence_put(fence);
|
|
|
|
if (bo->shadow)
|
|
return amdgpu_vm_clear_bo(adev, vm, bo->shadow,
|
|
level, pte_support_ats);
|
|
|
|
return 0;
|
|
|
|
error_free:
|
|
amdgpu_job_free(job);
|
|
|
|
error:
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_param - fill in parameters for PD/PT allocation
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requesting vm
|
|
* @bp: resulting BO allocation parameters
|
|
*/
|
|
static void amdgpu_vm_bo_param(struct amdgpu_device *adev, struct amdgpu_vm *vm,
|
|
int level, struct amdgpu_bo_param *bp)
|
|
{
|
|
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;
|
|
if (bp->size <= PAGE_SIZE && adev->asic_type >= CHIP_VEGA10 &&
|
|
adev->flags & AMD_IS_APU)
|
|
bp->domain |= AMDGPU_GEM_DOMAIN_GTT;
|
|
bp->domain = amdgpu_bo_get_preferred_pin_domain(adev, bp->domain);
|
|
bp->flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
|
|
AMDGPU_GEM_CREATE_CPU_GTT_USWC;
|
|
if (vm->use_cpu_for_update)
|
|
bp->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
|
|
else if (!vm->root.base.bo || vm->root.base.bo->shadow)
|
|
bp->flags |= AMDGPU_GEM_CREATE_SHADOW;
|
|
bp->type = ttm_bo_type_kernel;
|
|
if (vm->root.base.bo)
|
|
bp->resv = vm->root.base.bo->tbo.resv;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_alloc_pts - Allocate page tables.
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: VM to allocate page tables for
|
|
* @saddr: Start address which needs to be allocated
|
|
* @size: Size from start address we need.
|
|
*
|
|
* Make sure the page directories and page tables are allocated
|
|
*
|
|
* Returns:
|
|
* 0 on success, errno otherwise.
|
|
*/
|
|
int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm,
|
|
uint64_t saddr, uint64_t size)
|
|
{
|
|
struct amdgpu_vm_pt_cursor cursor;
|
|
struct amdgpu_bo *pt;
|
|
bool ats = false;
|
|
uint64_t eaddr;
|
|
int r;
|
|
|
|
/* validate the parameters */
|
|
if (saddr & AMDGPU_GPU_PAGE_MASK || size & AMDGPU_GPU_PAGE_MASK)
|
|
return -EINVAL;
|
|
|
|
eaddr = saddr + size - 1;
|
|
|
|
if (vm->pte_support_ats)
|
|
ats = saddr < AMDGPU_GMC_HOLE_START;
|
|
|
|
saddr /= AMDGPU_GPU_PAGE_SIZE;
|
|
eaddr /= AMDGPU_GPU_PAGE_SIZE;
|
|
|
|
if (eaddr >= adev->vm_manager.max_pfn) {
|
|
dev_err(adev->dev, "va above limit (0x%08llX >= 0x%08llX)\n",
|
|
eaddr, adev->vm_manager.max_pfn);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for_each_amdgpu_vm_pt_leaf(adev, vm, saddr, eaddr, cursor) {
|
|
struct amdgpu_vm_pt *entry = cursor.entry;
|
|
struct amdgpu_bo_param bp;
|
|
|
|
if (cursor.level < AMDGPU_VM_PTB) {
|
|
unsigned num_entries;
|
|
|
|
num_entries = amdgpu_vm_num_entries(adev, cursor.level);
|
|
entry->entries = kvmalloc_array(num_entries,
|
|
sizeof(*entry->entries),
|
|
GFP_KERNEL |
|
|
__GFP_ZERO);
|
|
if (!entry->entries)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
|
|
if (entry->base.bo)
|
|
continue;
|
|
|
|
amdgpu_vm_bo_param(adev, vm, cursor.level, &bp);
|
|
|
|
r = amdgpu_bo_create(adev, &bp, &pt);
|
|
if (r)
|
|
return r;
|
|
|
|
r = amdgpu_vm_clear_bo(adev, vm, pt, cursor.level, ats);
|
|
if (r)
|
|
goto error_free_pt;
|
|
|
|
if (vm->use_cpu_for_update) {
|
|
r = amdgpu_bo_kmap(pt, NULL);
|
|
if (r)
|
|
goto error_free_pt;
|
|
}
|
|
|
|
/* Keep a reference to the root directory to avoid
|
|
* freeing them up in the wrong order.
|
|
*/
|
|
pt->parent = amdgpu_bo_ref(cursor.parent->base.bo);
|
|
|
|
amdgpu_vm_bo_base_init(&entry->base, vm, pt);
|
|
}
|
|
|
|
return 0;
|
|
|
|
error_free_pt:
|
|
amdgpu_bo_unref(&pt->shadow);
|
|
amdgpu_bo_unref(&pt);
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_free_pts - free PD/PT levels
|
|
*
|
|
* @adev: amdgpu device structure
|
|
* @vm: amdgpu vm structure
|
|
*
|
|
* 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 cursor;
|
|
struct amdgpu_vm_pt *entry;
|
|
|
|
for_each_amdgpu_vm_pt_dfs_safe(adev, vm, cursor, entry) {
|
|
|
|
if (entry->base.bo) {
|
|
entry->base.bo->vm_bo = NULL;
|
|
list_del(&entry->base.vm_status);
|
|
amdgpu_bo_unref(&entry->base.bo->shadow);
|
|
amdgpu_bo_unref(&entry->base.bo);
|
|
}
|
|
kvfree(entry->entries);
|
|
}
|
|
|
|
BUG_ON(vm->root.base.bo);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_check_compute_bug - check whether asic has compute vm bug
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
*/
|
|
void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev)
|
|
{
|
|
const struct amdgpu_ip_block *ip_block;
|
|
bool has_compute_vm_bug;
|
|
struct amdgpu_ring *ring;
|
|
int i;
|
|
|
|
has_compute_vm_bug = false;
|
|
|
|
ip_block = amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_GFX);
|
|
if (ip_block) {
|
|
/* Compute has a VM bug for GFX version < 7.
|
|
Compute has a VM bug for GFX 8 MEC firmware version < 673.*/
|
|
if (ip_block->version->major <= 7)
|
|
has_compute_vm_bug = true;
|
|
else if (ip_block->version->major == 8)
|
|
if (adev->gfx.mec_fw_version < 673)
|
|
has_compute_vm_bug = true;
|
|
}
|
|
|
|
for (i = 0; i < adev->num_rings; i++) {
|
|
ring = adev->rings[i];
|
|
if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE)
|
|
/* only compute rings */
|
|
ring->has_compute_vm_bug = has_compute_vm_bug;
|
|
else
|
|
ring->has_compute_vm_bug = false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_need_pipeline_sync - Check if pipe sync is needed for job.
|
|
*
|
|
* @ring: ring on which the job will be submitted
|
|
* @job: job to submit
|
|
*
|
|
* Returns:
|
|
* True if sync is needed.
|
|
*/
|
|
bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
|
|
struct amdgpu_job *job)
|
|
{
|
|
struct amdgpu_device *adev = ring->adev;
|
|
unsigned vmhub = ring->funcs->vmhub;
|
|
struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
|
|
struct amdgpu_vmid *id;
|
|
bool gds_switch_needed;
|
|
bool vm_flush_needed = job->vm_needs_flush || ring->has_compute_vm_bug;
|
|
|
|
if (job->vmid == 0)
|
|
return false;
|
|
id = &id_mgr->ids[job->vmid];
|
|
gds_switch_needed = ring->funcs->emit_gds_switch && (
|
|
id->gds_base != job->gds_base ||
|
|
id->gds_size != job->gds_size ||
|
|
id->gws_base != job->gws_base ||
|
|
id->gws_size != job->gws_size ||
|
|
id->oa_base != job->oa_base ||
|
|
id->oa_size != job->oa_size);
|
|
|
|
if (amdgpu_vmid_had_gpu_reset(adev, id))
|
|
return true;
|
|
|
|
return vm_flush_needed || gds_switch_needed;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_flush - hardware flush the vm
|
|
*
|
|
* @ring: ring to use for flush
|
|
* @job: related job
|
|
* @need_pipe_sync: is pipe sync needed
|
|
*
|
|
* Emit a VM flush when it is necessary.
|
|
*
|
|
* Returns:
|
|
* 0 on success, errno otherwise.
|
|
*/
|
|
int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync)
|
|
{
|
|
struct amdgpu_device *adev = ring->adev;
|
|
unsigned vmhub = ring->funcs->vmhub;
|
|
struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
|
|
struct amdgpu_vmid *id = &id_mgr->ids[job->vmid];
|
|
bool gds_switch_needed = ring->funcs->emit_gds_switch && (
|
|
id->gds_base != job->gds_base ||
|
|
id->gds_size != job->gds_size ||
|
|
id->gws_base != job->gws_base ||
|
|
id->gws_size != job->gws_size ||
|
|
id->oa_base != job->oa_base ||
|
|
id->oa_size != job->oa_size);
|
|
bool vm_flush_needed = job->vm_needs_flush;
|
|
bool pasid_mapping_needed = id->pasid != job->pasid ||
|
|
!id->pasid_mapping ||
|
|
!dma_fence_is_signaled(id->pasid_mapping);
|
|
struct dma_fence *fence = NULL;
|
|
unsigned patch_offset = 0;
|
|
int r;
|
|
|
|
if (amdgpu_vmid_had_gpu_reset(adev, id)) {
|
|
gds_switch_needed = true;
|
|
vm_flush_needed = true;
|
|
pasid_mapping_needed = true;
|
|
}
|
|
|
|
gds_switch_needed &= !!ring->funcs->emit_gds_switch;
|
|
vm_flush_needed &= !!ring->funcs->emit_vm_flush &&
|
|
job->vm_pd_addr != AMDGPU_BO_INVALID_OFFSET;
|
|
pasid_mapping_needed &= adev->gmc.gmc_funcs->emit_pasid_mapping &&
|
|
ring->funcs->emit_wreg;
|
|
|
|
if (!vm_flush_needed && !gds_switch_needed && !need_pipe_sync)
|
|
return 0;
|
|
|
|
if (ring->funcs->init_cond_exec)
|
|
patch_offset = amdgpu_ring_init_cond_exec(ring);
|
|
|
|
if (need_pipe_sync)
|
|
amdgpu_ring_emit_pipeline_sync(ring);
|
|
|
|
if (vm_flush_needed) {
|
|
trace_amdgpu_vm_flush(ring, job->vmid, job->vm_pd_addr);
|
|
amdgpu_ring_emit_vm_flush(ring, job->vmid, job->vm_pd_addr);
|
|
}
|
|
|
|
if (pasid_mapping_needed)
|
|
amdgpu_gmc_emit_pasid_mapping(ring, job->vmid, job->pasid);
|
|
|
|
if (vm_flush_needed || pasid_mapping_needed) {
|
|
r = amdgpu_fence_emit(ring, &fence, 0);
|
|
if (r)
|
|
return r;
|
|
}
|
|
|
|
if (vm_flush_needed) {
|
|
mutex_lock(&id_mgr->lock);
|
|
dma_fence_put(id->last_flush);
|
|
id->last_flush = dma_fence_get(fence);
|
|
id->current_gpu_reset_count =
|
|
atomic_read(&adev->gpu_reset_counter);
|
|
mutex_unlock(&id_mgr->lock);
|
|
}
|
|
|
|
if (pasid_mapping_needed) {
|
|
id->pasid = job->pasid;
|
|
dma_fence_put(id->pasid_mapping);
|
|
id->pasid_mapping = dma_fence_get(fence);
|
|
}
|
|
dma_fence_put(fence);
|
|
|
|
if (ring->funcs->emit_gds_switch && gds_switch_needed) {
|
|
id->gds_base = job->gds_base;
|
|
id->gds_size = job->gds_size;
|
|
id->gws_base = job->gws_base;
|
|
id->gws_size = job->gws_size;
|
|
id->oa_base = job->oa_base;
|
|
id->oa_size = job->oa_size;
|
|
amdgpu_ring_emit_gds_switch(ring, job->vmid, job->gds_base,
|
|
job->gds_size, job->gws_base,
|
|
job->gws_size, job->oa_base,
|
|
job->oa_size);
|
|
}
|
|
|
|
if (ring->funcs->patch_cond_exec)
|
|
amdgpu_ring_patch_cond_exec(ring, patch_offset);
|
|
|
|
/* the double SWITCH_BUFFER here *cannot* be skipped by COND_EXEC */
|
|
if (ring->funcs->emit_switch_buffer) {
|
|
amdgpu_ring_emit_switch_buffer(ring);
|
|
amdgpu_ring_emit_switch_buffer(ring);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_find - find the bo_va for a specific vm & bo
|
|
*
|
|
* @vm: requested vm
|
|
* @bo: requested buffer object
|
|
*
|
|
* Find @bo inside the requested vm.
|
|
* Search inside the @bos vm list for the requested vm
|
|
* Returns the found bo_va or NULL if none is found
|
|
*
|
|
* Object has to be reserved!
|
|
*
|
|
* Returns:
|
|
* Found bo_va or NULL.
|
|
*/
|
|
struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
|
|
struct amdgpu_bo *bo)
|
|
{
|
|
struct amdgpu_vm_bo_base *base;
|
|
|
|
for (base = bo->vm_bo; base; base = base->next) {
|
|
if (base->vm != vm)
|
|
continue;
|
|
|
|
return container_of(base, struct amdgpu_bo_va, base);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_do_set_ptes - helper to call the right asic function
|
|
*
|
|
* @params: see amdgpu_pte_update_params definition
|
|
* @bo: PD/PT to update
|
|
* @pe: addr of the page entry
|
|
* @addr: dst addr to write into pe
|
|
* @count: number of page entries to update
|
|
* @incr: increase next addr by incr bytes
|
|
* @flags: hw access flags
|
|
*
|
|
* Traces the parameters and calls the right asic functions
|
|
* to setup the page table using the DMA.
|
|
*/
|
|
static void amdgpu_vm_do_set_ptes(struct amdgpu_pte_update_params *params,
|
|
struct amdgpu_bo *bo,
|
|
uint64_t pe, uint64_t addr,
|
|
unsigned count, uint32_t incr,
|
|
uint64_t flags)
|
|
{
|
|
pe += amdgpu_bo_gpu_offset(bo);
|
|
trace_amdgpu_vm_set_ptes(pe, addr, count, incr, flags);
|
|
|
|
if (count < 3) {
|
|
amdgpu_vm_write_pte(params->adev, params->ib, pe,
|
|
addr | flags, count, incr);
|
|
|
|
} else {
|
|
amdgpu_vm_set_pte_pde(params->adev, params->ib, pe, addr,
|
|
count, incr, flags);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_do_copy_ptes - copy the PTEs from the GART
|
|
*
|
|
* @params: see amdgpu_pte_update_params definition
|
|
* @bo: PD/PT to update
|
|
* @pe: addr of the page entry
|
|
* @addr: dst addr to write into pe
|
|
* @count: number of page entries to update
|
|
* @incr: increase next addr by incr bytes
|
|
* @flags: hw access flags
|
|
*
|
|
* Traces the parameters and calls the DMA function to copy the PTEs.
|
|
*/
|
|
static void amdgpu_vm_do_copy_ptes(struct amdgpu_pte_update_params *params,
|
|
struct amdgpu_bo *bo,
|
|
uint64_t pe, uint64_t addr,
|
|
unsigned count, uint32_t incr,
|
|
uint64_t flags)
|
|
{
|
|
uint64_t src = (params->src + (addr >> 12) * 8);
|
|
|
|
pe += amdgpu_bo_gpu_offset(bo);
|
|
trace_amdgpu_vm_copy_ptes(pe, src, count);
|
|
|
|
amdgpu_vm_copy_pte(params->adev, params->ib, pe, src, count);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_map_gart - Resolve gart mapping of addr
|
|
*
|
|
* @pages_addr: optional DMA address to use for lookup
|
|
* @addr: the unmapped addr
|
|
*
|
|
* Look up the physical address of the page that the pte resolves
|
|
* to.
|
|
*
|
|
* Returns:
|
|
* The pointer for the page table entry.
|
|
*/
|
|
static uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr)
|
|
{
|
|
uint64_t result;
|
|
|
|
/* page table offset */
|
|
result = pages_addr[addr >> PAGE_SHIFT];
|
|
|
|
/* in case cpu page size != gpu page size*/
|
|
result |= addr & (~PAGE_MASK);
|
|
|
|
result &= 0xFFFFFFFFFFFFF000ULL;
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_cpu_set_ptes - helper to update page tables via CPU
|
|
*
|
|
* @params: see amdgpu_pte_update_params definition
|
|
* @bo: PD/PT to update
|
|
* @pe: kmap addr of the page entry
|
|
* @addr: dst addr to write into pe
|
|
* @count: number of page entries to update
|
|
* @incr: increase next addr by incr bytes
|
|
* @flags: hw access flags
|
|
*
|
|
* Write count number of PT/PD entries directly.
|
|
*/
|
|
static void amdgpu_vm_cpu_set_ptes(struct amdgpu_pte_update_params *params,
|
|
struct amdgpu_bo *bo,
|
|
uint64_t pe, uint64_t addr,
|
|
unsigned count, uint32_t incr,
|
|
uint64_t flags)
|
|
{
|
|
unsigned int i;
|
|
uint64_t value;
|
|
|
|
pe += (unsigned long)amdgpu_bo_kptr(bo);
|
|
|
|
trace_amdgpu_vm_set_ptes(pe, addr, count, incr, flags);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
value = params->pages_addr ?
|
|
amdgpu_vm_map_gart(params->pages_addr, addr) :
|
|
addr;
|
|
amdgpu_gmc_set_pte_pde(params->adev, (void *)(uintptr_t)pe,
|
|
i, value, flags);
|
|
addr += incr;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* amdgpu_vm_wait_pd - Wait for PT BOs to be free.
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: related vm
|
|
* @owner: fence owner
|
|
*
|
|
* Returns:
|
|
* 0 on success, errno otherwise.
|
|
*/
|
|
static int amdgpu_vm_wait_pd(struct amdgpu_device *adev, struct amdgpu_vm *vm,
|
|
void *owner)
|
|
{
|
|
struct amdgpu_sync sync;
|
|
int r;
|
|
|
|
amdgpu_sync_create(&sync);
|
|
amdgpu_sync_resv(adev, &sync, vm->root.base.bo->tbo.resv, owner, false);
|
|
r = amdgpu_sync_wait(&sync, true);
|
|
amdgpu_sync_free(&sync);
|
|
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_update_func - helper to call update function
|
|
*
|
|
* Calls the update function for both the given BO as well as its shadow.
|
|
*/
|
|
static void amdgpu_vm_update_func(struct amdgpu_pte_update_params *params,
|
|
struct amdgpu_bo *bo,
|
|
uint64_t pe, uint64_t addr,
|
|
unsigned count, uint32_t incr,
|
|
uint64_t flags)
|
|
{
|
|
if (bo->shadow)
|
|
params->func(params, bo->shadow, pe, addr, count, incr, flags);
|
|
params->func(params, bo, pe, addr, count, incr, flags);
|
|
}
|
|
|
|
/*
|
|
* amdgpu_vm_update_pde - update a single level in the hierarchy
|
|
*
|
|
* @param: parameters for the update
|
|
* @vm: requested vm
|
|
* @parent: parent directory
|
|
* @entry: entry to update
|
|
*
|
|
* Makes sure the requested entry in parent is up to date.
|
|
*/
|
|
static void amdgpu_vm_update_pde(struct amdgpu_pte_update_params *params,
|
|
struct amdgpu_vm *vm,
|
|
struct amdgpu_vm_pt *parent,
|
|
struct amdgpu_vm_pt *entry)
|
|
{
|
|
struct amdgpu_bo *bo = parent->base.bo, *pbo;
|
|
uint64_t pde, pt, flags;
|
|
unsigned level;
|
|
|
|
/* Don't update huge pages here */
|
|
if (entry->huge)
|
|
return;
|
|
|
|
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->base.bo, level, &pt, &flags);
|
|
pde = (entry - parent->entries) * 8;
|
|
amdgpu_vm_update_func(params, bo, pde, pt, 1, 0, flags);
|
|
}
|
|
|
|
/*
|
|
* amdgpu_vm_invalidate_pds - mark all PDs as invalid
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: related vm
|
|
*
|
|
* Mark all PD level as invalid after an error.
|
|
*/
|
|
static void amdgpu_vm_invalidate_pds(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm)
|
|
{
|
|
struct amdgpu_vm_pt_cursor cursor;
|
|
struct amdgpu_vm_pt *entry;
|
|
|
|
for_each_amdgpu_vm_pt_dfs_safe(adev, vm, cursor, entry)
|
|
if (entry->base.bo && !entry->base.moved)
|
|
amdgpu_vm_bo_relocated(&entry->base);
|
|
}
|
|
|
|
/*
|
|
* amdgpu_vm_update_directories - make sure that all directories are valid
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
*
|
|
* Makes sure all directories are up to date.
|
|
*
|
|
* Returns:
|
|
* 0 for success, error for failure.
|
|
*/
|
|
int amdgpu_vm_update_directories(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm)
|
|
{
|
|
struct amdgpu_pte_update_params params;
|
|
struct amdgpu_job *job;
|
|
unsigned ndw = 0;
|
|
int r = 0;
|
|
|
|
if (list_empty(&vm->relocated))
|
|
return 0;
|
|
|
|
restart:
|
|
memset(¶ms, 0, sizeof(params));
|
|
params.adev = adev;
|
|
|
|
if (vm->use_cpu_for_update) {
|
|
r = amdgpu_vm_wait_pd(adev, vm, AMDGPU_FENCE_OWNER_VM);
|
|
if (unlikely(r))
|
|
return r;
|
|
|
|
params.func = amdgpu_vm_cpu_set_ptes;
|
|
} else {
|
|
ndw = 512 * 8;
|
|
r = amdgpu_job_alloc_with_ib(adev, ndw * 4, &job);
|
|
if (r)
|
|
return r;
|
|
|
|
params.ib = &job->ibs[0];
|
|
params.func = amdgpu_vm_do_set_ptes;
|
|
}
|
|
|
|
while (!list_empty(&vm->relocated)) {
|
|
struct amdgpu_vm_pt *pt, *entry;
|
|
|
|
entry = list_first_entry(&vm->relocated, struct amdgpu_vm_pt,
|
|
base.vm_status);
|
|
amdgpu_vm_bo_idle(&entry->base);
|
|
|
|
pt = amdgpu_vm_pt_parent(entry);
|
|
if (!pt)
|
|
continue;
|
|
|
|
amdgpu_vm_update_pde(¶ms, vm, pt, entry);
|
|
|
|
if (!vm->use_cpu_for_update &&
|
|
(ndw - params.ib->length_dw) < 32)
|
|
break;
|
|
}
|
|
|
|
if (vm->use_cpu_for_update) {
|
|
/* Flush HDP */
|
|
mb();
|
|
amdgpu_asic_flush_hdp(adev, NULL);
|
|
} else if (params.ib->length_dw == 0) {
|
|
amdgpu_job_free(job);
|
|
} else {
|
|
struct amdgpu_bo *root = vm->root.base.bo;
|
|
struct amdgpu_ring *ring;
|
|
struct dma_fence *fence;
|
|
|
|
ring = container_of(vm->entity.rq->sched, struct amdgpu_ring,
|
|
sched);
|
|
|
|
amdgpu_ring_pad_ib(ring, params.ib);
|
|
amdgpu_sync_resv(adev, &job->sync, root->tbo.resv,
|
|
AMDGPU_FENCE_OWNER_VM, false);
|
|
WARN_ON(params.ib->length_dw > ndw);
|
|
r = amdgpu_job_submit(job, &vm->entity, AMDGPU_FENCE_OWNER_VM,
|
|
&fence);
|
|
if (r)
|
|
goto error;
|
|
|
|
amdgpu_bo_fence(root, fence, true);
|
|
dma_fence_put(vm->last_update);
|
|
vm->last_update = fence;
|
|
}
|
|
|
|
if (!list_empty(&vm->relocated))
|
|
goto restart;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
amdgpu_vm_invalidate_pds(adev, vm);
|
|
amdgpu_job_free(job);
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_update_huge - figure out parameters for PTE updates
|
|
*
|
|
* Make sure to set the right flags for the PTEs at the desired level.
|
|
*/
|
|
static void amdgpu_vm_update_huge(struct amdgpu_pte_update_params *params,
|
|
struct amdgpu_bo *bo, unsigned level,
|
|
uint64_t pe, uint64_t addr,
|
|
unsigned 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);
|
|
}
|
|
|
|
amdgpu_vm_update_func(params, bo, pe, addr, count, incr, flags);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_fragment - get fragment for PTEs
|
|
*
|
|
* @params: see amdgpu_pte_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_pte_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->src) {
|
|
*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_pte_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_pte_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;
|
|
|
|
/* 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) {
|
|
struct amdgpu_bo *pt = cursor.entry->base.bo;
|
|
unsigned shift, parent_shift, mask;
|
|
uint64_t incr, entry_end, pe_start;
|
|
|
|
if (!pt)
|
|
return -ENOENT;
|
|
|
|
/* The root level can't be a huge page */
|
|
if (cursor.level == adev->vm_manager.root_level) {
|
|
if (!amdgpu_vm_pt_descendant(adev, &cursor))
|
|
return -ENOENT;
|
|
continue;
|
|
}
|
|
|
|
/* First check if the entry is already handled */
|
|
if (cursor.pfn < frag_start) {
|
|
cursor.entry->huge = true;
|
|
amdgpu_vm_pt_next(adev, &cursor);
|
|
continue;
|
|
}
|
|
|
|
/* If it isn't already handled it can't be a huge page */
|
|
if (cursor.entry->huge) {
|
|
/* Add the entry to the relocated list to update it. */
|
|
cursor.entry->huge = false;
|
|
amdgpu_vm_bo_relocated(&cursor.entry->base);
|
|
}
|
|
|
|
shift = amdgpu_vm_level_shift(adev, cursor.level);
|
|
parent_shift = amdgpu_vm_level_shift(adev, cursor.level - 1);
|
|
if (adev->asic_type < CHIP_VEGA10) {
|
|
/* 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))
|
|
return -ENOENT;
|
|
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 -ENOENT;
|
|
continue;
|
|
}
|
|
|
|
/* Looks good so far, calculate parameters for the update */
|
|
incr = AMDGPU_GPU_PAGE_SIZE << shift;
|
|
mask = amdgpu_vm_entries_mask(adev, cursor.level);
|
|
pe_start = ((cursor.pfn >> shift) & mask) * 8;
|
|
entry_end = (mask + 1) << shift;
|
|
entry_end += cursor.pfn & ~(entry_end - 1);
|
|
entry_end = min(entry_end, end);
|
|
|
|
do {
|
|
uint64_t upd_end = min(entry_end, frag_end);
|
|
unsigned nptes = (upd_end - frag_start) >> shift;
|
|
|
|
amdgpu_vm_update_huge(params, pt, cursor.level,
|
|
pe_start, dst, nptes, incr,
|
|
flags | AMDGPU_PTE_FRAG(frag));
|
|
|
|
pe_start += nptes * 8;
|
|
dst += nptes * AMDGPU_GPU_PAGE_SIZE << shift;
|
|
|
|
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 (frag >= shift)
|
|
amdgpu_vm_pt_next(adev, &cursor);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_update_mapping - update a mapping in the vm page table
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @exclusive: fence we need to sync to
|
|
* @pages_addr: DMA addresses to use for mapping
|
|
* @vm: requested vm
|
|
* @start: start of mapped range
|
|
* @last: last mapped entry
|
|
* @flags: flags for the entries
|
|
* @addr: addr to set the area to
|
|
* @fence: optional resulting fence
|
|
*
|
|
* Fill in the page table entries between @start and @last.
|
|
*
|
|
* Returns:
|
|
* 0 for success, -EINVAL for failure.
|
|
*/
|
|
static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
|
|
struct dma_fence *exclusive,
|
|
dma_addr_t *pages_addr,
|
|
struct amdgpu_vm *vm,
|
|
uint64_t start, uint64_t last,
|
|
uint64_t flags, uint64_t addr,
|
|
struct dma_fence **fence)
|
|
{
|
|
struct amdgpu_ring *ring;
|
|
void *owner = AMDGPU_FENCE_OWNER_VM;
|
|
unsigned nptes, ncmds, ndw;
|
|
struct amdgpu_job *job;
|
|
struct amdgpu_pte_update_params params;
|
|
struct dma_fence *f = NULL;
|
|
int r;
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
params.adev = adev;
|
|
params.vm = vm;
|
|
|
|
/* sync to everything on unmapping */
|
|
if (!(flags & AMDGPU_PTE_VALID))
|
|
owner = AMDGPU_FENCE_OWNER_UNDEFINED;
|
|
|
|
if (vm->use_cpu_for_update) {
|
|
/* params.src is used as flag to indicate system Memory */
|
|
if (pages_addr)
|
|
params.src = ~0;
|
|
|
|
/* Wait for PT BOs to be free. PTs share the same resv. object
|
|
* as the root PD BO
|
|
*/
|
|
r = amdgpu_vm_wait_pd(adev, vm, owner);
|
|
if (unlikely(r))
|
|
return r;
|
|
|
|
params.func = amdgpu_vm_cpu_set_ptes;
|
|
params.pages_addr = pages_addr;
|
|
return amdgpu_vm_update_ptes(¶ms, start, last + 1,
|
|
addr, flags);
|
|
}
|
|
|
|
ring = container_of(vm->entity.rq->sched, struct amdgpu_ring, sched);
|
|
|
|
nptes = last - start + 1;
|
|
|
|
/*
|
|
* reserve space for two commands every (1 << BLOCK_SIZE)
|
|
* entries or 2k dwords (whatever is smaller)
|
|
*
|
|
* The second command is for the shadow pagetables.
|
|
*/
|
|
if (vm->root.base.bo->shadow)
|
|
ncmds = ((nptes >> min(adev->vm_manager.block_size, 11u)) + 1) * 2;
|
|
else
|
|
ncmds = ((nptes >> min(adev->vm_manager.block_size, 11u)) + 1);
|
|
|
|
/* padding, etc. */
|
|
ndw = 64;
|
|
|
|
if (pages_addr) {
|
|
/* copy commands needed */
|
|
ndw += ncmds * adev->vm_manager.vm_pte_funcs->copy_pte_num_dw;
|
|
|
|
/* and also PTEs */
|
|
ndw += nptes * 2;
|
|
|
|
params.func = amdgpu_vm_do_copy_ptes;
|
|
|
|
} else {
|
|
/* set page commands needed */
|
|
ndw += ncmds * 10;
|
|
|
|
/* extra commands for begin/end fragments */
|
|
if (vm->root.base.bo->shadow)
|
|
ndw += 2 * 10 * adev->vm_manager.fragment_size * 2;
|
|
else
|
|
ndw += 2 * 10 * adev->vm_manager.fragment_size;
|
|
|
|
params.func = amdgpu_vm_do_set_ptes;
|
|
}
|
|
|
|
r = amdgpu_job_alloc_with_ib(adev, ndw * 4, &job);
|
|
if (r)
|
|
return r;
|
|
|
|
params.ib = &job->ibs[0];
|
|
|
|
if (pages_addr) {
|
|
uint64_t *pte;
|
|
unsigned i;
|
|
|
|
/* Put the PTEs at the end of the IB. */
|
|
i = ndw - nptes * 2;
|
|
pte= (uint64_t *)&(job->ibs->ptr[i]);
|
|
params.src = job->ibs->gpu_addr + i * 4;
|
|
|
|
for (i = 0; i < nptes; ++i) {
|
|
pte[i] = amdgpu_vm_map_gart(pages_addr, addr + i *
|
|
AMDGPU_GPU_PAGE_SIZE);
|
|
pte[i] |= flags;
|
|
}
|
|
addr = 0;
|
|
}
|
|
|
|
r = amdgpu_sync_fence(adev, &job->sync, exclusive, false);
|
|
if (r)
|
|
goto error_free;
|
|
|
|
r = amdgpu_sync_resv(adev, &job->sync, vm->root.base.bo->tbo.resv,
|
|
owner, false);
|
|
if (r)
|
|
goto error_free;
|
|
|
|
r = reservation_object_reserve_shared(vm->root.base.bo->tbo.resv);
|
|
if (r)
|
|
goto error_free;
|
|
|
|
r = amdgpu_vm_update_ptes(¶ms, start, last + 1, addr, flags);
|
|
if (r)
|
|
goto error_free;
|
|
|
|
amdgpu_ring_pad_ib(ring, params.ib);
|
|
WARN_ON(params.ib->length_dw > ndw);
|
|
r = amdgpu_job_submit(job, &vm->entity, AMDGPU_FENCE_OWNER_VM, &f);
|
|
if (r)
|
|
goto error_free;
|
|
|
|
amdgpu_bo_fence(vm->root.base.bo, f, true);
|
|
dma_fence_put(*fence);
|
|
*fence = f;
|
|
return 0;
|
|
|
|
error_free:
|
|
amdgpu_job_free(job);
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_split_mapping - split a mapping into smaller chunks
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @exclusive: fence we need to sync to
|
|
* @pages_addr: DMA addresses to use for mapping
|
|
* @vm: requested vm
|
|
* @mapping: mapped range and flags to use for the update
|
|
* @flags: HW flags for the mapping
|
|
* @nodes: array of drm_mm_nodes with the MC addresses
|
|
* @fence: optional resulting fence
|
|
*
|
|
* Split the mapping into smaller chunks so that each update fits
|
|
* into a SDMA IB.
|
|
*
|
|
* Returns:
|
|
* 0 for success, -EINVAL for failure.
|
|
*/
|
|
static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev,
|
|
struct dma_fence *exclusive,
|
|
dma_addr_t *pages_addr,
|
|
struct amdgpu_vm *vm,
|
|
struct amdgpu_bo_va_mapping *mapping,
|
|
uint64_t flags,
|
|
struct drm_mm_node *nodes,
|
|
struct dma_fence **fence)
|
|
{
|
|
unsigned min_linear_pages = 1 << adev->vm_manager.fragment_size;
|
|
uint64_t pfn, start = mapping->start;
|
|
int r;
|
|
|
|
/* normally,bo_va->flags only contians READABLE and WIRTEABLE bit go here
|
|
* but in case of something, we filter the flags in first place
|
|
*/
|
|
if (!(mapping->flags & AMDGPU_PTE_READABLE))
|
|
flags &= ~AMDGPU_PTE_READABLE;
|
|
if (!(mapping->flags & AMDGPU_PTE_WRITEABLE))
|
|
flags &= ~AMDGPU_PTE_WRITEABLE;
|
|
|
|
flags &= ~AMDGPU_PTE_EXECUTABLE;
|
|
flags |= mapping->flags & AMDGPU_PTE_EXECUTABLE;
|
|
|
|
flags &= ~AMDGPU_PTE_MTYPE_MASK;
|
|
flags |= (mapping->flags & AMDGPU_PTE_MTYPE_MASK);
|
|
|
|
if ((mapping->flags & AMDGPU_PTE_PRT) &&
|
|
(adev->asic_type >= CHIP_VEGA10)) {
|
|
flags |= AMDGPU_PTE_PRT;
|
|
flags &= ~AMDGPU_PTE_VALID;
|
|
}
|
|
|
|
trace_amdgpu_vm_bo_update(mapping);
|
|
|
|
pfn = mapping->offset >> PAGE_SHIFT;
|
|
if (nodes) {
|
|
while (pfn >= nodes->size) {
|
|
pfn -= nodes->size;
|
|
++nodes;
|
|
}
|
|
}
|
|
|
|
do {
|
|
dma_addr_t *dma_addr = NULL;
|
|
uint64_t max_entries;
|
|
uint64_t addr, last;
|
|
|
|
if (nodes) {
|
|
addr = nodes->start << PAGE_SHIFT;
|
|
max_entries = (nodes->size - pfn) *
|
|
AMDGPU_GPU_PAGES_IN_CPU_PAGE;
|
|
} else {
|
|
addr = 0;
|
|
max_entries = S64_MAX;
|
|
}
|
|
|
|
if (pages_addr) {
|
|
uint64_t count;
|
|
|
|
max_entries = min(max_entries, 16ull * 1024ull);
|
|
for (count = 1;
|
|
count < max_entries / AMDGPU_GPU_PAGES_IN_CPU_PAGE;
|
|
++count) {
|
|
uint64_t idx = pfn + count;
|
|
|
|
if (pages_addr[idx] !=
|
|
(pages_addr[idx - 1] + PAGE_SIZE))
|
|
break;
|
|
}
|
|
|
|
if (count < min_linear_pages) {
|
|
addr = pfn << PAGE_SHIFT;
|
|
dma_addr = pages_addr;
|
|
} else {
|
|
addr = pages_addr[pfn];
|
|
max_entries = count * AMDGPU_GPU_PAGES_IN_CPU_PAGE;
|
|
}
|
|
|
|
} else if (flags & AMDGPU_PTE_VALID) {
|
|
addr += adev->vm_manager.vram_base_offset;
|
|
addr += pfn << PAGE_SHIFT;
|
|
}
|
|
|
|
last = min((uint64_t)mapping->last, start + max_entries - 1);
|
|
r = amdgpu_vm_bo_update_mapping(adev, exclusive, dma_addr, vm,
|
|
start, last, flags, addr,
|
|
fence);
|
|
if (r)
|
|
return r;
|
|
|
|
pfn += (last - start + 1) / AMDGPU_GPU_PAGES_IN_CPU_PAGE;
|
|
if (nodes && nodes->size == pfn) {
|
|
pfn = 0;
|
|
++nodes;
|
|
}
|
|
start = last + 1;
|
|
|
|
} while (unlikely(start != mapping->last + 1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_update - update all BO mappings in the vm page table
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @bo_va: requested BO and VM object
|
|
* @clear: if true clear the entries
|
|
*
|
|
* Fill in the page table entries for @bo_va.
|
|
*
|
|
* Returns:
|
|
* 0 for success, -EINVAL for failure.
|
|
*/
|
|
int amdgpu_vm_bo_update(struct amdgpu_device *adev,
|
|
struct amdgpu_bo_va *bo_va,
|
|
bool clear)
|
|
{
|
|
struct amdgpu_bo *bo = bo_va->base.bo;
|
|
struct amdgpu_vm *vm = bo_va->base.vm;
|
|
struct amdgpu_bo_va_mapping *mapping;
|
|
dma_addr_t *pages_addr = NULL;
|
|
struct ttm_mem_reg *mem;
|
|
struct drm_mm_node *nodes;
|
|
struct dma_fence *exclusive, **last_update;
|
|
uint64_t flags;
|
|
int r;
|
|
|
|
if (clear || !bo) {
|
|
mem = NULL;
|
|
nodes = NULL;
|
|
exclusive = NULL;
|
|
} else {
|
|
struct ttm_dma_tt *ttm;
|
|
|
|
mem = &bo->tbo.mem;
|
|
nodes = mem->mm_node;
|
|
if (mem->mem_type == TTM_PL_TT) {
|
|
ttm = container_of(bo->tbo.ttm, struct ttm_dma_tt, ttm);
|
|
pages_addr = ttm->dma_address;
|
|
}
|
|
exclusive = reservation_object_get_excl(bo->tbo.resv);
|
|
}
|
|
|
|
if (bo)
|
|
flags = amdgpu_ttm_tt_pte_flags(adev, bo->tbo.ttm, mem);
|
|
else
|
|
flags = 0x0;
|
|
|
|
if (clear || (bo && bo->tbo.resv == vm->root.base.bo->tbo.resv))
|
|
last_update = &vm->last_update;
|
|
else
|
|
last_update = &bo_va->last_pt_update;
|
|
|
|
if (!clear && bo_va->base.moved) {
|
|
bo_va->base.moved = false;
|
|
list_splice_init(&bo_va->valids, &bo_va->invalids);
|
|
|
|
} else if (bo_va->cleared != clear) {
|
|
list_splice_init(&bo_va->valids, &bo_va->invalids);
|
|
}
|
|
|
|
list_for_each_entry(mapping, &bo_va->invalids, list) {
|
|
r = amdgpu_vm_bo_split_mapping(adev, exclusive, pages_addr, vm,
|
|
mapping, flags, nodes,
|
|
last_update);
|
|
if (r)
|
|
return r;
|
|
}
|
|
|
|
if (vm->use_cpu_for_update) {
|
|
/* Flush HDP */
|
|
mb();
|
|
amdgpu_asic_flush_hdp(adev, NULL);
|
|
}
|
|
|
|
/* If the BO is not in its preferred location add it back to
|
|
* the evicted list so that it gets validated again on the
|
|
* next command submission.
|
|
*/
|
|
if (bo && bo->tbo.resv == vm->root.base.bo->tbo.resv) {
|
|
uint32_t mem_type = bo->tbo.mem.mem_type;
|
|
|
|
if (!(bo->preferred_domains & amdgpu_mem_type_to_domain(mem_type)))
|
|
amdgpu_vm_bo_evicted(&bo_va->base);
|
|
else
|
|
amdgpu_vm_bo_idle(&bo_va->base);
|
|
} else {
|
|
amdgpu_vm_bo_done(&bo_va->base);
|
|
}
|
|
|
|
list_splice_init(&bo_va->invalids, &bo_va->valids);
|
|
bo_va->cleared = clear;
|
|
|
|
if (trace_amdgpu_vm_bo_mapping_enabled()) {
|
|
list_for_each_entry(mapping, &bo_va->valids, list)
|
|
trace_amdgpu_vm_bo_mapping(mapping);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_update_prt_state - update the global PRT state
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
*/
|
|
static void amdgpu_vm_update_prt_state(struct amdgpu_device *adev)
|
|
{
|
|
unsigned long flags;
|
|
bool enable;
|
|
|
|
spin_lock_irqsave(&adev->vm_manager.prt_lock, flags);
|
|
enable = !!atomic_read(&adev->vm_manager.num_prt_users);
|
|
adev->gmc.gmc_funcs->set_prt(adev, enable);
|
|
spin_unlock_irqrestore(&adev->vm_manager.prt_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_prt_get - add a PRT user
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
*/
|
|
static void amdgpu_vm_prt_get(struct amdgpu_device *adev)
|
|
{
|
|
if (!adev->gmc.gmc_funcs->set_prt)
|
|
return;
|
|
|
|
if (atomic_inc_return(&adev->vm_manager.num_prt_users) == 1)
|
|
amdgpu_vm_update_prt_state(adev);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_prt_put - drop a PRT user
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
*/
|
|
static void amdgpu_vm_prt_put(struct amdgpu_device *adev)
|
|
{
|
|
if (atomic_dec_return(&adev->vm_manager.num_prt_users) == 0)
|
|
amdgpu_vm_update_prt_state(adev);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_prt_cb - callback for updating the PRT status
|
|
*
|
|
* @fence: fence for the callback
|
|
* @_cb: the callback function
|
|
*/
|
|
static void amdgpu_vm_prt_cb(struct dma_fence *fence, struct dma_fence_cb *_cb)
|
|
{
|
|
struct amdgpu_prt_cb *cb = container_of(_cb, struct amdgpu_prt_cb, cb);
|
|
|
|
amdgpu_vm_prt_put(cb->adev);
|
|
kfree(cb);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_add_prt_cb - add callback for updating the PRT status
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @fence: fence for the callback
|
|
*/
|
|
static void amdgpu_vm_add_prt_cb(struct amdgpu_device *adev,
|
|
struct dma_fence *fence)
|
|
{
|
|
struct amdgpu_prt_cb *cb;
|
|
|
|
if (!adev->gmc.gmc_funcs->set_prt)
|
|
return;
|
|
|
|
cb = kmalloc(sizeof(struct amdgpu_prt_cb), GFP_KERNEL);
|
|
if (!cb) {
|
|
/* Last resort when we are OOM */
|
|
if (fence)
|
|
dma_fence_wait(fence, false);
|
|
|
|
amdgpu_vm_prt_put(adev);
|
|
} else {
|
|
cb->adev = adev;
|
|
if (!fence || dma_fence_add_callback(fence, &cb->cb,
|
|
amdgpu_vm_prt_cb))
|
|
amdgpu_vm_prt_cb(fence, &cb->cb);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_free_mapping - free a mapping
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
* @mapping: mapping to be freed
|
|
* @fence: fence of the unmap operation
|
|
*
|
|
* Free a mapping and make sure we decrease the PRT usage count if applicable.
|
|
*/
|
|
static void amdgpu_vm_free_mapping(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm,
|
|
struct amdgpu_bo_va_mapping *mapping,
|
|
struct dma_fence *fence)
|
|
{
|
|
if (mapping->flags & AMDGPU_PTE_PRT)
|
|
amdgpu_vm_add_prt_cb(adev, fence);
|
|
kfree(mapping);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_prt_fini - finish all prt mappings
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
*
|
|
* Register a cleanup callback to disable PRT support after VM dies.
|
|
*/
|
|
static void amdgpu_vm_prt_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
|
|
{
|
|
struct reservation_object *resv = vm->root.base.bo->tbo.resv;
|
|
struct dma_fence *excl, **shared;
|
|
unsigned i, shared_count;
|
|
int r;
|
|
|
|
r = reservation_object_get_fences_rcu(resv, &excl,
|
|
&shared_count, &shared);
|
|
if (r) {
|
|
/* Not enough memory to grab the fence list, as last resort
|
|
* block for all the fences to complete.
|
|
*/
|
|
reservation_object_wait_timeout_rcu(resv, true, false,
|
|
MAX_SCHEDULE_TIMEOUT);
|
|
return;
|
|
}
|
|
|
|
/* Add a callback for each fence in the reservation object */
|
|
amdgpu_vm_prt_get(adev);
|
|
amdgpu_vm_add_prt_cb(adev, excl);
|
|
|
|
for (i = 0; i < shared_count; ++i) {
|
|
amdgpu_vm_prt_get(adev);
|
|
amdgpu_vm_add_prt_cb(adev, shared[i]);
|
|
}
|
|
|
|
kfree(shared);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_clear_freed - clear freed BOs in the PT
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
* @fence: optional resulting fence (unchanged if no work needed to be done
|
|
* or if an error occurred)
|
|
*
|
|
* Make sure all freed BOs are cleared in the PT.
|
|
* PTs have to be reserved and mutex must be locked!
|
|
*
|
|
* Returns:
|
|
* 0 for success.
|
|
*
|
|
*/
|
|
int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm,
|
|
struct dma_fence **fence)
|
|
{
|
|
struct amdgpu_bo_va_mapping *mapping;
|
|
uint64_t init_pte_value = 0;
|
|
struct dma_fence *f = NULL;
|
|
int r;
|
|
|
|
while (!list_empty(&vm->freed)) {
|
|
mapping = list_first_entry(&vm->freed,
|
|
struct amdgpu_bo_va_mapping, list);
|
|
list_del(&mapping->list);
|
|
|
|
if (vm->pte_support_ats &&
|
|
mapping->start < AMDGPU_GMC_HOLE_START)
|
|
init_pte_value = AMDGPU_PTE_DEFAULT_ATC;
|
|
|
|
r = amdgpu_vm_bo_update_mapping(adev, NULL, NULL, vm,
|
|
mapping->start, mapping->last,
|
|
init_pte_value, 0, &f);
|
|
amdgpu_vm_free_mapping(adev, vm, mapping, f);
|
|
if (r) {
|
|
dma_fence_put(f);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
if (fence && f) {
|
|
dma_fence_put(*fence);
|
|
*fence = f;
|
|
} else {
|
|
dma_fence_put(f);
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_handle_moved - handle moved BOs in the PT
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
*
|
|
* Make sure all BOs which are moved are updated in the PTs.
|
|
*
|
|
* Returns:
|
|
* 0 for success.
|
|
*
|
|
* PTs have to be reserved!
|
|
*/
|
|
int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm)
|
|
{
|
|
struct amdgpu_bo_va *bo_va, *tmp;
|
|
struct reservation_object *resv;
|
|
bool clear;
|
|
int r;
|
|
|
|
list_for_each_entry_safe(bo_va, tmp, &vm->moved, base.vm_status) {
|
|
/* Per VM BOs never need to bo cleared in the page tables */
|
|
r = amdgpu_vm_bo_update(adev, bo_va, false);
|
|
if (r)
|
|
return r;
|
|
}
|
|
|
|
spin_lock(&vm->invalidated_lock);
|
|
while (!list_empty(&vm->invalidated)) {
|
|
bo_va = list_first_entry(&vm->invalidated, struct amdgpu_bo_va,
|
|
base.vm_status);
|
|
resv = bo_va->base.bo->tbo.resv;
|
|
spin_unlock(&vm->invalidated_lock);
|
|
|
|
/* Try to reserve the BO to avoid clearing its ptes */
|
|
if (!amdgpu_vm_debug && reservation_object_trylock(resv))
|
|
clear = false;
|
|
/* Somebody else is using the BO right now */
|
|
else
|
|
clear = true;
|
|
|
|
r = amdgpu_vm_bo_update(adev, bo_va, clear);
|
|
if (r)
|
|
return r;
|
|
|
|
if (!clear)
|
|
reservation_object_unlock(resv);
|
|
spin_lock(&vm->invalidated_lock);
|
|
}
|
|
spin_unlock(&vm->invalidated_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_add - add a bo to a specific vm
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
* @bo: amdgpu buffer object
|
|
*
|
|
* Add @bo into the requested vm.
|
|
* Add @bo to the list of bos associated with the vm
|
|
*
|
|
* Returns:
|
|
* Newly added bo_va or NULL for failure
|
|
*
|
|
* Object has to be reserved!
|
|
*/
|
|
struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm,
|
|
struct amdgpu_bo *bo)
|
|
{
|
|
struct amdgpu_bo_va *bo_va;
|
|
|
|
bo_va = kzalloc(sizeof(struct amdgpu_bo_va), GFP_KERNEL);
|
|
if (bo_va == NULL) {
|
|
return NULL;
|
|
}
|
|
amdgpu_vm_bo_base_init(&bo_va->base, vm, bo);
|
|
|
|
bo_va->ref_count = 1;
|
|
INIT_LIST_HEAD(&bo_va->valids);
|
|
INIT_LIST_HEAD(&bo_va->invalids);
|
|
|
|
return bo_va;
|
|
}
|
|
|
|
|
|
/**
|
|
* amdgpu_vm_bo_insert_mapping - insert a new mapping
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @bo_va: bo_va to store the address
|
|
* @mapping: the mapping to insert
|
|
*
|
|
* Insert a new mapping into all structures.
|
|
*/
|
|
static void amdgpu_vm_bo_insert_map(struct amdgpu_device *adev,
|
|
struct amdgpu_bo_va *bo_va,
|
|
struct amdgpu_bo_va_mapping *mapping)
|
|
{
|
|
struct amdgpu_vm *vm = bo_va->base.vm;
|
|
struct amdgpu_bo *bo = bo_va->base.bo;
|
|
|
|
mapping->bo_va = bo_va;
|
|
list_add(&mapping->list, &bo_va->invalids);
|
|
amdgpu_vm_it_insert(mapping, &vm->va);
|
|
|
|
if (mapping->flags & AMDGPU_PTE_PRT)
|
|
amdgpu_vm_prt_get(adev);
|
|
|
|
if (bo && bo->tbo.resv == vm->root.base.bo->tbo.resv &&
|
|
!bo_va->base.moved) {
|
|
list_move(&bo_va->base.vm_status, &vm->moved);
|
|
}
|
|
trace_amdgpu_vm_bo_map(bo_va, mapping);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_map - map bo inside a vm
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @bo_va: bo_va to store the address
|
|
* @saddr: where to map the BO
|
|
* @offset: requested offset in the BO
|
|
* @size: BO size in bytes
|
|
* @flags: attributes of pages (read/write/valid/etc.)
|
|
*
|
|
* Add a mapping of the BO at the specefied addr into the VM.
|
|
*
|
|
* Returns:
|
|
* 0 for success, error for failure.
|
|
*
|
|
* Object has to be reserved and unreserved outside!
|
|
*/
|
|
int amdgpu_vm_bo_map(struct amdgpu_device *adev,
|
|
struct amdgpu_bo_va *bo_va,
|
|
uint64_t saddr, uint64_t offset,
|
|
uint64_t size, uint64_t flags)
|
|
{
|
|
struct amdgpu_bo_va_mapping *mapping, *tmp;
|
|
struct amdgpu_bo *bo = bo_va->base.bo;
|
|
struct amdgpu_vm *vm = bo_va->base.vm;
|
|
uint64_t eaddr;
|
|
|
|
/* validate the parameters */
|
|
if (saddr & AMDGPU_GPU_PAGE_MASK || offset & AMDGPU_GPU_PAGE_MASK ||
|
|
size == 0 || size & AMDGPU_GPU_PAGE_MASK)
|
|
return -EINVAL;
|
|
|
|
/* make sure object fit at this offset */
|
|
eaddr = saddr + size - 1;
|
|
if (saddr >= eaddr ||
|
|
(bo && offset + size > amdgpu_bo_size(bo)))
|
|
return -EINVAL;
|
|
|
|
saddr /= AMDGPU_GPU_PAGE_SIZE;
|
|
eaddr /= AMDGPU_GPU_PAGE_SIZE;
|
|
|
|
tmp = amdgpu_vm_it_iter_first(&vm->va, saddr, eaddr);
|
|
if (tmp) {
|
|
/* bo and tmp overlap, invalid addr */
|
|
dev_err(adev->dev, "bo %p va 0x%010Lx-0x%010Lx conflict with "
|
|
"0x%010Lx-0x%010Lx\n", bo, saddr, eaddr,
|
|
tmp->start, tmp->last + 1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mapping = kmalloc(sizeof(*mapping), GFP_KERNEL);
|
|
if (!mapping)
|
|
return -ENOMEM;
|
|
|
|
mapping->start = saddr;
|
|
mapping->last = eaddr;
|
|
mapping->offset = offset;
|
|
mapping->flags = flags;
|
|
|
|
amdgpu_vm_bo_insert_map(adev, bo_va, mapping);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_replace_map - map bo inside a vm, replacing existing mappings
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @bo_va: bo_va to store the address
|
|
* @saddr: where to map the BO
|
|
* @offset: requested offset in the BO
|
|
* @size: BO size in bytes
|
|
* @flags: attributes of pages (read/write/valid/etc.)
|
|
*
|
|
* Add a mapping of the BO at the specefied addr into the VM. Replace existing
|
|
* mappings as we do so.
|
|
*
|
|
* Returns:
|
|
* 0 for success, error for failure.
|
|
*
|
|
* Object has to be reserved and unreserved outside!
|
|
*/
|
|
int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
|
|
struct amdgpu_bo_va *bo_va,
|
|
uint64_t saddr, uint64_t offset,
|
|
uint64_t size, uint64_t flags)
|
|
{
|
|
struct amdgpu_bo_va_mapping *mapping;
|
|
struct amdgpu_bo *bo = bo_va->base.bo;
|
|
uint64_t eaddr;
|
|
int r;
|
|
|
|
/* validate the parameters */
|
|
if (saddr & AMDGPU_GPU_PAGE_MASK || offset & AMDGPU_GPU_PAGE_MASK ||
|
|
size == 0 || size & AMDGPU_GPU_PAGE_MASK)
|
|
return -EINVAL;
|
|
|
|
/* make sure object fit at this offset */
|
|
eaddr = saddr + size - 1;
|
|
if (saddr >= eaddr ||
|
|
(bo && offset + size > amdgpu_bo_size(bo)))
|
|
return -EINVAL;
|
|
|
|
/* Allocate all the needed memory */
|
|
mapping = kmalloc(sizeof(*mapping), GFP_KERNEL);
|
|
if (!mapping)
|
|
return -ENOMEM;
|
|
|
|
r = amdgpu_vm_bo_clear_mappings(adev, bo_va->base.vm, saddr, size);
|
|
if (r) {
|
|
kfree(mapping);
|
|
return r;
|
|
}
|
|
|
|
saddr /= AMDGPU_GPU_PAGE_SIZE;
|
|
eaddr /= AMDGPU_GPU_PAGE_SIZE;
|
|
|
|
mapping->start = saddr;
|
|
mapping->last = eaddr;
|
|
mapping->offset = offset;
|
|
mapping->flags = flags;
|
|
|
|
amdgpu_vm_bo_insert_map(adev, bo_va, mapping);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_unmap - remove bo mapping from vm
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @bo_va: bo_va to remove the address from
|
|
* @saddr: where to the BO is mapped
|
|
*
|
|
* Remove a mapping of the BO at the specefied addr from the VM.
|
|
*
|
|
* Returns:
|
|
* 0 for success, error for failure.
|
|
*
|
|
* Object has to be reserved and unreserved outside!
|
|
*/
|
|
int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
|
|
struct amdgpu_bo_va *bo_va,
|
|
uint64_t saddr)
|
|
{
|
|
struct amdgpu_bo_va_mapping *mapping;
|
|
struct amdgpu_vm *vm = bo_va->base.vm;
|
|
bool valid = true;
|
|
|
|
saddr /= AMDGPU_GPU_PAGE_SIZE;
|
|
|
|
list_for_each_entry(mapping, &bo_va->valids, list) {
|
|
if (mapping->start == saddr)
|
|
break;
|
|
}
|
|
|
|
if (&mapping->list == &bo_va->valids) {
|
|
valid = false;
|
|
|
|
list_for_each_entry(mapping, &bo_va->invalids, list) {
|
|
if (mapping->start == saddr)
|
|
break;
|
|
}
|
|
|
|
if (&mapping->list == &bo_va->invalids)
|
|
return -ENOENT;
|
|
}
|
|
|
|
list_del(&mapping->list);
|
|
amdgpu_vm_it_remove(mapping, &vm->va);
|
|
mapping->bo_va = NULL;
|
|
trace_amdgpu_vm_bo_unmap(bo_va, mapping);
|
|
|
|
if (valid)
|
|
list_add(&mapping->list, &vm->freed);
|
|
else
|
|
amdgpu_vm_free_mapping(adev, vm, mapping,
|
|
bo_va->last_pt_update);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_clear_mappings - remove all mappings in a specific range
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: VM structure to use
|
|
* @saddr: start of the range
|
|
* @size: size of the range
|
|
*
|
|
* Remove all mappings in a range, split them as appropriate.
|
|
*
|
|
* Returns:
|
|
* 0 for success, error for failure.
|
|
*/
|
|
int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm,
|
|
uint64_t saddr, uint64_t size)
|
|
{
|
|
struct amdgpu_bo_va_mapping *before, *after, *tmp, *next;
|
|
LIST_HEAD(removed);
|
|
uint64_t eaddr;
|
|
|
|
eaddr = saddr + size - 1;
|
|
saddr /= AMDGPU_GPU_PAGE_SIZE;
|
|
eaddr /= AMDGPU_GPU_PAGE_SIZE;
|
|
|
|
/* Allocate all the needed memory */
|
|
before = kzalloc(sizeof(*before), GFP_KERNEL);
|
|
if (!before)
|
|
return -ENOMEM;
|
|
INIT_LIST_HEAD(&before->list);
|
|
|
|
after = kzalloc(sizeof(*after), GFP_KERNEL);
|
|
if (!after) {
|
|
kfree(before);
|
|
return -ENOMEM;
|
|
}
|
|
INIT_LIST_HEAD(&after->list);
|
|
|
|
/* Now gather all removed mappings */
|
|
tmp = amdgpu_vm_it_iter_first(&vm->va, saddr, eaddr);
|
|
while (tmp) {
|
|
/* Remember mapping split at the start */
|
|
if (tmp->start < saddr) {
|
|
before->start = tmp->start;
|
|
before->last = saddr - 1;
|
|
before->offset = tmp->offset;
|
|
before->flags = tmp->flags;
|
|
before->bo_va = tmp->bo_va;
|
|
list_add(&before->list, &tmp->bo_va->invalids);
|
|
}
|
|
|
|
/* Remember mapping split at the end */
|
|
if (tmp->last > eaddr) {
|
|
after->start = eaddr + 1;
|
|
after->last = tmp->last;
|
|
after->offset = tmp->offset;
|
|
after->offset += after->start - tmp->start;
|
|
after->flags = tmp->flags;
|
|
after->bo_va = tmp->bo_va;
|
|
list_add(&after->list, &tmp->bo_va->invalids);
|
|
}
|
|
|
|
list_del(&tmp->list);
|
|
list_add(&tmp->list, &removed);
|
|
|
|
tmp = amdgpu_vm_it_iter_next(tmp, saddr, eaddr);
|
|
}
|
|
|
|
/* And free them up */
|
|
list_for_each_entry_safe(tmp, next, &removed, list) {
|
|
amdgpu_vm_it_remove(tmp, &vm->va);
|
|
list_del(&tmp->list);
|
|
|
|
if (tmp->start < saddr)
|
|
tmp->start = saddr;
|
|
if (tmp->last > eaddr)
|
|
tmp->last = eaddr;
|
|
|
|
tmp->bo_va = NULL;
|
|
list_add(&tmp->list, &vm->freed);
|
|
trace_amdgpu_vm_bo_unmap(NULL, tmp);
|
|
}
|
|
|
|
/* Insert partial mapping before the range */
|
|
if (!list_empty(&before->list)) {
|
|
amdgpu_vm_it_insert(before, &vm->va);
|
|
if (before->flags & AMDGPU_PTE_PRT)
|
|
amdgpu_vm_prt_get(adev);
|
|
} else {
|
|
kfree(before);
|
|
}
|
|
|
|
/* Insert partial mapping after the range */
|
|
if (!list_empty(&after->list)) {
|
|
amdgpu_vm_it_insert(after, &vm->va);
|
|
if (after->flags & AMDGPU_PTE_PRT)
|
|
amdgpu_vm_prt_get(adev);
|
|
} else {
|
|
kfree(after);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_lookup_mapping - find mapping by address
|
|
*
|
|
* @vm: the requested VM
|
|
* @addr: the address
|
|
*
|
|
* Find a mapping by it's address.
|
|
*
|
|
* Returns:
|
|
* The amdgpu_bo_va_mapping matching for addr or NULL
|
|
*
|
|
*/
|
|
struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
|
|
uint64_t addr)
|
|
{
|
|
return amdgpu_vm_it_iter_first(&vm->va, addr, addr);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_trace_cs - trace all reserved mappings
|
|
*
|
|
* @vm: the requested vm
|
|
* @ticket: CS ticket
|
|
*
|
|
* Trace all mappings of BOs reserved during a command submission.
|
|
*/
|
|
void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket)
|
|
{
|
|
struct amdgpu_bo_va_mapping *mapping;
|
|
|
|
if (!trace_amdgpu_vm_bo_cs_enabled())
|
|
return;
|
|
|
|
for (mapping = amdgpu_vm_it_iter_first(&vm->va, 0, U64_MAX); mapping;
|
|
mapping = amdgpu_vm_it_iter_next(mapping, 0, U64_MAX)) {
|
|
if (mapping->bo_va && mapping->bo_va->base.bo) {
|
|
struct amdgpu_bo *bo;
|
|
|
|
bo = mapping->bo_va->base.bo;
|
|
if (READ_ONCE(bo->tbo.resv->lock.ctx) != ticket)
|
|
continue;
|
|
}
|
|
|
|
trace_amdgpu_vm_bo_cs(mapping);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_rmv - remove a bo to a specific vm
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @bo_va: requested bo_va
|
|
*
|
|
* Remove @bo_va->bo from the requested vm.
|
|
*
|
|
* Object have to be reserved!
|
|
*/
|
|
void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
|
|
struct amdgpu_bo_va *bo_va)
|
|
{
|
|
struct amdgpu_bo_va_mapping *mapping, *next;
|
|
struct amdgpu_bo *bo = bo_va->base.bo;
|
|
struct amdgpu_vm *vm = bo_va->base.vm;
|
|
struct amdgpu_vm_bo_base **base;
|
|
|
|
if (bo) {
|
|
if (bo->tbo.resv == vm->root.base.bo->tbo.resv)
|
|
vm->bulk_moveable = false;
|
|
|
|
for (base = &bo_va->base.bo->vm_bo; *base;
|
|
base = &(*base)->next) {
|
|
if (*base != &bo_va->base)
|
|
continue;
|
|
|
|
*base = bo_va->base.next;
|
|
break;
|
|
}
|
|
}
|
|
|
|
spin_lock(&vm->invalidated_lock);
|
|
list_del(&bo_va->base.vm_status);
|
|
spin_unlock(&vm->invalidated_lock);
|
|
|
|
list_for_each_entry_safe(mapping, next, &bo_va->valids, list) {
|
|
list_del(&mapping->list);
|
|
amdgpu_vm_it_remove(mapping, &vm->va);
|
|
mapping->bo_va = NULL;
|
|
trace_amdgpu_vm_bo_unmap(bo_va, mapping);
|
|
list_add(&mapping->list, &vm->freed);
|
|
}
|
|
list_for_each_entry_safe(mapping, next, &bo_va->invalids, list) {
|
|
list_del(&mapping->list);
|
|
amdgpu_vm_it_remove(mapping, &vm->va);
|
|
amdgpu_vm_free_mapping(adev, vm, mapping,
|
|
bo_va->last_pt_update);
|
|
}
|
|
|
|
dma_fence_put(bo_va->last_pt_update);
|
|
kfree(bo_va);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_bo_invalidate - mark the bo as invalid
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @bo: amdgpu buffer object
|
|
* @evicted: is the BO evicted
|
|
*
|
|
* Mark @bo as invalid.
|
|
*/
|
|
void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
|
|
struct amdgpu_bo *bo, bool evicted)
|
|
{
|
|
struct amdgpu_vm_bo_base *bo_base;
|
|
|
|
/* shadow bo doesn't have bo base, its validation needs its parent */
|
|
if (bo->parent && bo->parent->shadow == bo)
|
|
bo = bo->parent;
|
|
|
|
for (bo_base = bo->vm_bo; bo_base; bo_base = bo_base->next) {
|
|
struct amdgpu_vm *vm = bo_base->vm;
|
|
|
|
if (evicted && bo->tbo.resv == vm->root.base.bo->tbo.resv) {
|
|
amdgpu_vm_bo_evicted(bo_base);
|
|
continue;
|
|
}
|
|
|
|
if (bo_base->moved)
|
|
continue;
|
|
bo_base->moved = true;
|
|
|
|
if (bo->tbo.type == ttm_bo_type_kernel)
|
|
amdgpu_vm_bo_relocated(bo_base);
|
|
else if (bo->tbo.resv == vm->root.base.bo->tbo.resv)
|
|
amdgpu_vm_bo_moved(bo_base);
|
|
else
|
|
amdgpu_vm_bo_invalidated(bo_base);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_get_block_size - calculate VM page table size as power of two
|
|
*
|
|
* @vm_size: VM size
|
|
*
|
|
* Returns:
|
|
* VM page table as power of two
|
|
*/
|
|
static uint32_t amdgpu_vm_get_block_size(uint64_t vm_size)
|
|
{
|
|
/* Total bits covered by PD + PTs */
|
|
unsigned bits = ilog2(vm_size) + 18;
|
|
|
|
/* Make sure the PD is 4K in size up to 8GB address space.
|
|
Above that split equal between PD and PTs */
|
|
if (vm_size <= 8)
|
|
return (bits - 9);
|
|
else
|
|
return ((bits + 3) / 2);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_adjust_size - adjust vm size, block size and fragment size
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @min_vm_size: the minimum vm size in GB if it's set auto
|
|
* @fragment_size_default: Default PTE fragment size
|
|
* @max_level: max VMPT level
|
|
* @max_bits: max address space size in bits
|
|
*
|
|
*/
|
|
void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
|
|
uint32_t fragment_size_default, unsigned max_level,
|
|
unsigned max_bits)
|
|
{
|
|
unsigned int max_size = 1 << (max_bits - 30);
|
|
unsigned int vm_size;
|
|
uint64_t tmp;
|
|
|
|
/* adjust vm size first */
|
|
if (amdgpu_vm_size != -1) {
|
|
vm_size = amdgpu_vm_size;
|
|
if (vm_size > max_size) {
|
|
dev_warn(adev->dev, "VM size (%d) too large, max is %u GB\n",
|
|
amdgpu_vm_size, max_size);
|
|
vm_size = max_size;
|
|
}
|
|
} else {
|
|
struct sysinfo si;
|
|
unsigned int phys_ram_gb;
|
|
|
|
/* Optimal VM size depends on the amount of physical
|
|
* RAM available. Underlying requirements and
|
|
* assumptions:
|
|
*
|
|
* - Need to map system memory and VRAM from all GPUs
|
|
* - VRAM from other GPUs not known here
|
|
* - Assume VRAM <= system memory
|
|
* - On GFX8 and older, VM space can be segmented for
|
|
* different MTYPEs
|
|
* - Need to allow room for fragmentation, guard pages etc.
|
|
*
|
|
* This adds up to a rough guess of system memory x3.
|
|
* Round up to power of two to maximize the available
|
|
* VM size with the given page table size.
|
|
*/
|
|
si_meminfo(&si);
|
|
phys_ram_gb = ((uint64_t)si.totalram * si.mem_unit +
|
|
(1 << 30) - 1) >> 30;
|
|
vm_size = roundup_pow_of_two(
|
|
min(max(phys_ram_gb * 3, min_vm_size), max_size));
|
|
}
|
|
|
|
adev->vm_manager.max_pfn = (uint64_t)vm_size << 18;
|
|
|
|
tmp = roundup_pow_of_two(adev->vm_manager.max_pfn);
|
|
if (amdgpu_vm_block_size != -1)
|
|
tmp >>= amdgpu_vm_block_size - 9;
|
|
tmp = DIV_ROUND_UP(fls64(tmp) - 1, 9) - 1;
|
|
adev->vm_manager.num_level = min(max_level, (unsigned)tmp);
|
|
switch (adev->vm_manager.num_level) {
|
|
case 3:
|
|
adev->vm_manager.root_level = AMDGPU_VM_PDB2;
|
|
break;
|
|
case 2:
|
|
adev->vm_manager.root_level = AMDGPU_VM_PDB1;
|
|
break;
|
|
case 1:
|
|
adev->vm_manager.root_level = AMDGPU_VM_PDB0;
|
|
break;
|
|
default:
|
|
dev_err(adev->dev, "VMPT only supports 2~4+1 levels\n");
|
|
}
|
|
/* block size depends on vm size and hw setup*/
|
|
if (amdgpu_vm_block_size != -1)
|
|
adev->vm_manager.block_size =
|
|
min((unsigned)amdgpu_vm_block_size, max_bits
|
|
- AMDGPU_GPU_PAGE_SHIFT
|
|
- 9 * adev->vm_manager.num_level);
|
|
else if (adev->vm_manager.num_level > 1)
|
|
adev->vm_manager.block_size = 9;
|
|
else
|
|
adev->vm_manager.block_size = amdgpu_vm_get_block_size(tmp);
|
|
|
|
if (amdgpu_vm_fragment_size == -1)
|
|
adev->vm_manager.fragment_size = fragment_size_default;
|
|
else
|
|
adev->vm_manager.fragment_size = amdgpu_vm_fragment_size;
|
|
|
|
DRM_INFO("vm size is %u GB, %u levels, block size is %u-bit, fragment size is %u-bit\n",
|
|
vm_size, adev->vm_manager.num_level + 1,
|
|
adev->vm_manager.block_size,
|
|
adev->vm_manager.fragment_size);
|
|
}
|
|
|
|
static struct amdgpu_retryfault_hashtable *init_fault_hash(void)
|
|
{
|
|
struct amdgpu_retryfault_hashtable *fault_hash;
|
|
|
|
fault_hash = kmalloc(sizeof(*fault_hash), GFP_KERNEL);
|
|
if (!fault_hash)
|
|
return fault_hash;
|
|
|
|
INIT_CHASH_TABLE(fault_hash->hash,
|
|
AMDGPU_PAGEFAULT_HASH_BITS, 8, 0);
|
|
spin_lock_init(&fault_hash->lock);
|
|
fault_hash->count = 0;
|
|
|
|
return fault_hash;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_init - initialize a vm instance
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
* @vm_context: Indicates if it GFX or Compute context
|
|
* @pasid: Process address space identifier
|
|
*
|
|
* Init @vm fields.
|
|
*
|
|
* Returns:
|
|
* 0 for success, error for failure.
|
|
*/
|
|
int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
|
|
int vm_context, unsigned int pasid)
|
|
{
|
|
struct amdgpu_bo_param bp;
|
|
struct amdgpu_bo *root;
|
|
int r, i;
|
|
|
|
vm->va = RB_ROOT_CACHED;
|
|
for (i = 0; i < AMDGPU_MAX_VMHUBS; i++)
|
|
vm->reserved_vmid[i] = NULL;
|
|
INIT_LIST_HEAD(&vm->evicted);
|
|
INIT_LIST_HEAD(&vm->relocated);
|
|
INIT_LIST_HEAD(&vm->moved);
|
|
INIT_LIST_HEAD(&vm->idle);
|
|
INIT_LIST_HEAD(&vm->invalidated);
|
|
spin_lock_init(&vm->invalidated_lock);
|
|
INIT_LIST_HEAD(&vm->freed);
|
|
|
|
/* create scheduler entity for page table updates */
|
|
r = drm_sched_entity_init(&vm->entity, adev->vm_manager.vm_pte_rqs,
|
|
adev->vm_manager.vm_pte_num_rqs, NULL);
|
|
if (r)
|
|
return r;
|
|
|
|
vm->pte_support_ats = false;
|
|
|
|
if (vm_context == AMDGPU_VM_CONTEXT_COMPUTE) {
|
|
vm->use_cpu_for_update = !!(adev->vm_manager.vm_update_mode &
|
|
AMDGPU_VM_USE_CPU_FOR_COMPUTE);
|
|
|
|
if (adev->asic_type == CHIP_RAVEN)
|
|
vm->pte_support_ats = true;
|
|
} else {
|
|
vm->use_cpu_for_update = !!(adev->vm_manager.vm_update_mode &
|
|
AMDGPU_VM_USE_CPU_FOR_GFX);
|
|
}
|
|
DRM_DEBUG_DRIVER("VM update mode is %s\n",
|
|
vm->use_cpu_for_update ? "CPU" : "SDMA");
|
|
WARN_ONCE((vm->use_cpu_for_update & !amdgpu_gmc_vram_full_visible(&adev->gmc)),
|
|
"CPU update of VM recommended only for large BAR system\n");
|
|
vm->last_update = NULL;
|
|
|
|
amdgpu_vm_bo_param(adev, vm, adev->vm_manager.root_level, &bp);
|
|
if (vm_context == AMDGPU_VM_CONTEXT_COMPUTE)
|
|
bp.flags &= ~AMDGPU_GEM_CREATE_SHADOW;
|
|
r = amdgpu_bo_create(adev, &bp, &root);
|
|
if (r)
|
|
goto error_free_sched_entity;
|
|
|
|
r = amdgpu_bo_reserve(root, true);
|
|
if (r)
|
|
goto error_free_root;
|
|
|
|
r = amdgpu_vm_clear_bo(adev, vm, root,
|
|
adev->vm_manager.root_level,
|
|
vm->pte_support_ats);
|
|
if (r)
|
|
goto error_unreserve;
|
|
|
|
amdgpu_vm_bo_base_init(&vm->root.base, vm, root);
|
|
amdgpu_bo_unreserve(vm->root.base.bo);
|
|
|
|
if (pasid) {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
|
|
r = idr_alloc(&adev->vm_manager.pasid_idr, vm, pasid, pasid + 1,
|
|
GFP_ATOMIC);
|
|
spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
|
|
if (r < 0)
|
|
goto error_free_root;
|
|
|
|
vm->pasid = pasid;
|
|
}
|
|
|
|
vm->fault_hash = init_fault_hash();
|
|
if (!vm->fault_hash) {
|
|
r = -ENOMEM;
|
|
goto error_free_root;
|
|
}
|
|
|
|
INIT_KFIFO(vm->faults);
|
|
vm->fault_credit = 16;
|
|
|
|
return 0;
|
|
|
|
error_unreserve:
|
|
amdgpu_bo_unreserve(vm->root.base.bo);
|
|
|
|
error_free_root:
|
|
amdgpu_bo_unref(&vm->root.base.bo->shadow);
|
|
amdgpu_bo_unref(&vm->root.base.bo);
|
|
vm->root.base.bo = NULL;
|
|
|
|
error_free_sched_entity:
|
|
drm_sched_entity_destroy(&vm->entity);
|
|
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_make_compute - Turn a GFX VM into a compute VM
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
*
|
|
* This only works on GFX VMs that don't have any BOs added and no
|
|
* page tables allocated yet.
|
|
*
|
|
* Changes the following VM parameters:
|
|
* - use_cpu_for_update
|
|
* - pte_supports_ats
|
|
* - pasid (old PASID is released, because compute manages its own PASIDs)
|
|
*
|
|
* Reinitializes the page directory to reflect the changed ATS
|
|
* setting.
|
|
*
|
|
* Returns:
|
|
* 0 for success, -errno for errors.
|
|
*/
|
|
int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, unsigned int pasid)
|
|
{
|
|
bool pte_support_ats = (adev->asic_type == CHIP_RAVEN);
|
|
int r;
|
|
|
|
r = amdgpu_bo_reserve(vm->root.base.bo, true);
|
|
if (r)
|
|
return r;
|
|
|
|
/* Sanity checks */
|
|
if (!RB_EMPTY_ROOT(&vm->va.rb_root) || vm->root.entries) {
|
|
r = -EINVAL;
|
|
goto unreserve_bo;
|
|
}
|
|
|
|
if (pasid) {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
|
|
r = idr_alloc(&adev->vm_manager.pasid_idr, vm, pasid, pasid + 1,
|
|
GFP_ATOMIC);
|
|
spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
|
|
|
|
if (r == -ENOSPC)
|
|
goto unreserve_bo;
|
|
r = 0;
|
|
}
|
|
|
|
/* 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) {
|
|
r = amdgpu_vm_clear_bo(adev, vm, vm->root.base.bo,
|
|
adev->vm_manager.root_level,
|
|
pte_support_ats);
|
|
if (r)
|
|
goto free_idr;
|
|
}
|
|
|
|
/* Update VM state */
|
|
vm->use_cpu_for_update = !!(adev->vm_manager.vm_update_mode &
|
|
AMDGPU_VM_USE_CPU_FOR_COMPUTE);
|
|
vm->pte_support_ats = pte_support_ats;
|
|
DRM_DEBUG_DRIVER("VM update mode is %s\n",
|
|
vm->use_cpu_for_update ? "CPU" : "SDMA");
|
|
WARN_ONCE((vm->use_cpu_for_update & !amdgpu_gmc_vram_full_visible(&adev->gmc)),
|
|
"CPU update of VM recommended only for large BAR system\n");
|
|
|
|
if (vm->pasid) {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
|
|
idr_remove(&adev->vm_manager.pasid_idr, vm->pasid);
|
|
spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
|
|
|
|
/* Free the original amdgpu allocated pasid
|
|
* Will be replaced with kfd allocated pasid
|
|
*/
|
|
amdgpu_pasid_free(vm->pasid);
|
|
vm->pasid = 0;
|
|
}
|
|
|
|
/* Free the shadow bo for compute VM */
|
|
amdgpu_bo_unref(&vm->root.base.bo->shadow);
|
|
|
|
if (pasid)
|
|
vm->pasid = pasid;
|
|
|
|
goto unreserve_bo;
|
|
|
|
free_idr:
|
|
if (pasid) {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
|
|
idr_remove(&adev->vm_manager.pasid_idr, pasid);
|
|
spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
|
|
}
|
|
unreserve_bo:
|
|
amdgpu_bo_unreserve(vm->root.base.bo);
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_release_compute - release a compute vm
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: a vm turned into compute vm by calling amdgpu_vm_make_compute
|
|
*
|
|
* This is a correspondant of amdgpu_vm_make_compute. It decouples compute
|
|
* pasid from vm. Compute should stop use of vm after this call.
|
|
*/
|
|
void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm)
|
|
{
|
|
if (vm->pasid) {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
|
|
idr_remove(&adev->vm_manager.pasid_idr, vm->pasid);
|
|
spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
|
|
}
|
|
vm->pasid = 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_fini - tear down a vm instance
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
*
|
|
* Tear down @vm.
|
|
* Unbind the VM and remove all bos from the vm bo list
|
|
*/
|
|
void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
|
|
{
|
|
struct amdgpu_bo_va_mapping *mapping, *tmp;
|
|
bool prt_fini_needed = !!adev->gmc.gmc_funcs->set_prt;
|
|
struct amdgpu_bo *root;
|
|
u64 fault;
|
|
int i, r;
|
|
|
|
amdgpu_amdkfd_gpuvm_destroy_cb(adev, vm);
|
|
|
|
/* Clear pending page faults from IH when the VM is destroyed */
|
|
while (kfifo_get(&vm->faults, &fault))
|
|
amdgpu_vm_clear_fault(vm->fault_hash, fault);
|
|
|
|
if (vm->pasid) {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
|
|
idr_remove(&adev->vm_manager.pasid_idr, vm->pasid);
|
|
spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
|
|
}
|
|
|
|
kfree(vm->fault_hash);
|
|
vm->fault_hash = NULL;
|
|
|
|
drm_sched_entity_destroy(&vm->entity);
|
|
|
|
if (!RB_EMPTY_ROOT(&vm->va.rb_root)) {
|
|
dev_err(adev->dev, "still active bo inside vm\n");
|
|
}
|
|
rbtree_postorder_for_each_entry_safe(mapping, tmp,
|
|
&vm->va.rb_root, rb) {
|
|
list_del(&mapping->list);
|
|
amdgpu_vm_it_remove(mapping, &vm->va);
|
|
kfree(mapping);
|
|
}
|
|
list_for_each_entry_safe(mapping, tmp, &vm->freed, list) {
|
|
if (mapping->flags & AMDGPU_PTE_PRT && prt_fini_needed) {
|
|
amdgpu_vm_prt_fini(adev, vm);
|
|
prt_fini_needed = false;
|
|
}
|
|
|
|
list_del(&mapping->list);
|
|
amdgpu_vm_free_mapping(adev, vm, mapping, NULL);
|
|
}
|
|
|
|
root = amdgpu_bo_ref(vm->root.base.bo);
|
|
r = amdgpu_bo_reserve(root, true);
|
|
if (r) {
|
|
dev_err(adev->dev, "Leaking page tables because BO reservation failed\n");
|
|
} else {
|
|
amdgpu_vm_free_pts(adev, vm);
|
|
amdgpu_bo_unreserve(root);
|
|
}
|
|
amdgpu_bo_unref(&root);
|
|
dma_fence_put(vm->last_update);
|
|
for (i = 0; i < AMDGPU_MAX_VMHUBS; i++)
|
|
amdgpu_vmid_free_reserved(adev, vm, i);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_pasid_fault_credit - Check fault credit for given PASID
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @pasid: PASID do identify the VM
|
|
*
|
|
* This function is expected to be called in interrupt context.
|
|
*
|
|
* Returns:
|
|
* True if there was fault credit, false otherwise
|
|
*/
|
|
bool amdgpu_vm_pasid_fault_credit(struct amdgpu_device *adev,
|
|
unsigned int pasid)
|
|
{
|
|
struct amdgpu_vm *vm;
|
|
|
|
spin_lock(&adev->vm_manager.pasid_lock);
|
|
vm = idr_find(&adev->vm_manager.pasid_idr, pasid);
|
|
if (!vm) {
|
|
/* VM not found, can't track fault credit */
|
|
spin_unlock(&adev->vm_manager.pasid_lock);
|
|
return true;
|
|
}
|
|
|
|
/* No lock needed. only accessed by IRQ handler */
|
|
if (!vm->fault_credit) {
|
|
/* Too many faults in this VM */
|
|
spin_unlock(&adev->vm_manager.pasid_lock);
|
|
return false;
|
|
}
|
|
|
|
vm->fault_credit--;
|
|
spin_unlock(&adev->vm_manager.pasid_lock);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_manager_init - init the VM manager
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
*
|
|
* Initialize the VM manager structures
|
|
*/
|
|
void amdgpu_vm_manager_init(struct amdgpu_device *adev)
|
|
{
|
|
unsigned i;
|
|
|
|
amdgpu_vmid_mgr_init(adev);
|
|
|
|
adev->vm_manager.fence_context =
|
|
dma_fence_context_alloc(AMDGPU_MAX_RINGS);
|
|
for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
|
|
adev->vm_manager.seqno[i] = 0;
|
|
|
|
spin_lock_init(&adev->vm_manager.prt_lock);
|
|
atomic_set(&adev->vm_manager.num_prt_users, 0);
|
|
|
|
/* If not overridden by the user, by default, only in large BAR systems
|
|
* Compute VM tables will be updated by CPU
|
|
*/
|
|
#ifdef CONFIG_X86_64
|
|
if (amdgpu_vm_update_mode == -1) {
|
|
if (amdgpu_gmc_vram_full_visible(&adev->gmc))
|
|
adev->vm_manager.vm_update_mode =
|
|
AMDGPU_VM_USE_CPU_FOR_COMPUTE;
|
|
else
|
|
adev->vm_manager.vm_update_mode = 0;
|
|
} else
|
|
adev->vm_manager.vm_update_mode = amdgpu_vm_update_mode;
|
|
#else
|
|
adev->vm_manager.vm_update_mode = 0;
|
|
#endif
|
|
|
|
idr_init(&adev->vm_manager.pasid_idr);
|
|
spin_lock_init(&adev->vm_manager.pasid_lock);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_manager_fini - cleanup VM manager
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
*
|
|
* Cleanup the VM manager and free resources.
|
|
*/
|
|
void amdgpu_vm_manager_fini(struct amdgpu_device *adev)
|
|
{
|
|
WARN_ON(!idr_is_empty(&adev->vm_manager.pasid_idr));
|
|
idr_destroy(&adev->vm_manager.pasid_idr);
|
|
|
|
amdgpu_vmid_mgr_fini(adev);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_ioctl - Manages VMID reservation for vm hubs.
|
|
*
|
|
* @dev: drm device pointer
|
|
* @data: drm_amdgpu_vm
|
|
* @filp: drm file pointer
|
|
*
|
|
* Returns:
|
|
* 0 for success, -errno for errors.
|
|
*/
|
|
int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
|
|
{
|
|
union drm_amdgpu_vm *args = data;
|
|
struct amdgpu_device *adev = dev->dev_private;
|
|
struct amdgpu_fpriv *fpriv = filp->driver_priv;
|
|
int r;
|
|
|
|
switch (args->in.op) {
|
|
case AMDGPU_VM_OP_RESERVE_VMID:
|
|
/* current, we only have requirement to reserve vmid from gfxhub */
|
|
r = amdgpu_vmid_alloc_reserved(adev, &fpriv->vm, AMDGPU_GFXHUB);
|
|
if (r)
|
|
return r;
|
|
break;
|
|
case AMDGPU_VM_OP_UNRESERVE_VMID:
|
|
amdgpu_vmid_free_reserved(adev, &fpriv->vm, AMDGPU_GFXHUB);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_get_task_info - Extracts task info for a PASID.
|
|
*
|
|
* @adev: drm device pointer
|
|
* @pasid: PASID identifier for VM
|
|
* @task_info: task_info to fill.
|
|
*/
|
|
void amdgpu_vm_get_task_info(struct amdgpu_device *adev, unsigned int pasid,
|
|
struct amdgpu_task_info *task_info)
|
|
{
|
|
struct amdgpu_vm *vm;
|
|
|
|
spin_lock(&adev->vm_manager.pasid_lock);
|
|
|
|
vm = idr_find(&adev->vm_manager.pasid_idr, pasid);
|
|
if (vm)
|
|
*task_info = vm->task_info;
|
|
|
|
spin_unlock(&adev->vm_manager.pasid_lock);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_set_task_info - Sets VMs task info.
|
|
*
|
|
* @vm: vm for which to set the info
|
|
*/
|
|
void amdgpu_vm_set_task_info(struct amdgpu_vm *vm)
|
|
{
|
|
if (!vm->task_info.pid) {
|
|
vm->task_info.pid = current->pid;
|
|
get_task_comm(vm->task_info.task_name, current);
|
|
|
|
if (current->group_leader->mm == current->mm) {
|
|
vm->task_info.tgid = current->group_leader->pid;
|
|
get_task_comm(vm->task_info.process_name, current->group_leader);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_add_fault - Add a page fault record to fault hash table
|
|
*
|
|
* @fault_hash: fault hash table
|
|
* @key: 64-bit encoding of PASID and address
|
|
*
|
|
* This should be called when a retry page fault interrupt is
|
|
* received. If this is a new page fault, it will be added to a hash
|
|
* table. The return value indicates whether this is a new fault, or
|
|
* a fault that was already known and is already being handled.
|
|
*
|
|
* If there are too many pending page faults, this will fail. Retry
|
|
* interrupts should be ignored in this case until there is enough
|
|
* free space.
|
|
*
|
|
* Returns 0 if the fault was added, 1 if the fault was already known,
|
|
* -ENOSPC if there are too many pending faults.
|
|
*/
|
|
int amdgpu_vm_add_fault(struct amdgpu_retryfault_hashtable *fault_hash, u64 key)
|
|
{
|
|
unsigned long flags;
|
|
int r = -ENOSPC;
|
|
|
|
if (WARN_ON_ONCE(!fault_hash))
|
|
/* Should be allocated in amdgpu_vm_init
|
|
*/
|
|
return r;
|
|
|
|
spin_lock_irqsave(&fault_hash->lock, flags);
|
|
|
|
/* Only let the hash table fill up to 50% for best performance */
|
|
if (fault_hash->count >= (1 << (AMDGPU_PAGEFAULT_HASH_BITS-1)))
|
|
goto unlock_out;
|
|
|
|
r = chash_table_copy_in(&fault_hash->hash, key, NULL);
|
|
if (!r)
|
|
fault_hash->count++;
|
|
|
|
/* chash_table_copy_in should never fail unless we're losing count */
|
|
WARN_ON_ONCE(r < 0);
|
|
|
|
unlock_out:
|
|
spin_unlock_irqrestore(&fault_hash->lock, flags);
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_clear_fault - Remove a page fault record
|
|
*
|
|
* @fault_hash: fault hash table
|
|
* @key: 64-bit encoding of PASID and address
|
|
*
|
|
* This should be called when a page fault has been handled. Any
|
|
* future interrupt with this key will be processed as a new
|
|
* page fault.
|
|
*/
|
|
void amdgpu_vm_clear_fault(struct amdgpu_retryfault_hashtable *fault_hash, u64 key)
|
|
{
|
|
unsigned long flags;
|
|
int r;
|
|
|
|
if (!fault_hash)
|
|
return;
|
|
|
|
spin_lock_irqsave(&fault_hash->lock, flags);
|
|
|
|
r = chash_table_remove(&fault_hash->hash, key, NULL);
|
|
if (!WARN_ON_ONCE(r < 0)) {
|
|
fault_hash->count--;
|
|
WARN_ON_ONCE(fault_hash->count < 0);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&fault_hash->lock, flags);
|
|
}
|