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![Christian König](/assets/img/avatar_default.png)
Otherwise somebody could try to evict it at the same time and try to use half torn down structures. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-and-Tested-by: Michel Dänzer <michel.daenzer@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2952 lines
76 KiB
C
2952 lines
76 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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/*
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* PASID manager
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*
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* PASIDs are global address space identifiers that can be shared
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* between the GPU, an IOMMU and the driver. VMs on different devices
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* may use the same PASID if they share the same address
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* space. Therefore PASIDs are allocated using a global IDA. VMs are
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* looked up from the PASID per amdgpu_device.
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*/
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static DEFINE_IDA(amdgpu_vm_pasid_ida);
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/**
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* amdgpu_vm_alloc_pasid - Allocate a PASID
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* @bits: Maximum width of the PASID in bits, must be at least 1
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*
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* Allocates a PASID of the given width while keeping smaller PASIDs
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* available if possible.
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*
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* Returns a positive integer on success. Returns %-EINVAL if bits==0.
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* Returns %-ENOSPC if no PASID was available. Returns %-ENOMEM on
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* memory allocation failure.
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*/
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int amdgpu_vm_alloc_pasid(unsigned int bits)
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{
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int pasid = -EINVAL;
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for (bits = min(bits, 31U); bits > 0; bits--) {
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pasid = ida_simple_get(&amdgpu_vm_pasid_ida,
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1U << (bits - 1), 1U << bits,
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GFP_KERNEL);
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if (pasid != -ENOSPC)
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break;
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}
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return pasid;
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}
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/**
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* amdgpu_vm_free_pasid - Free a PASID
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* @pasid: PASID to free
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*/
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void amdgpu_vm_free_pasid(unsigned int pasid)
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{
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ida_simple_remove(&amdgpu_vm_pasid_ida, pasid);
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}
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/*
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* GPUVM
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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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/* Local structure. 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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struct amdgpu_pte_update_params {
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/* amdgpu device we do this update for */
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struct amdgpu_device *adev;
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/* optional amdgpu_vm we do this update for */
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struct amdgpu_vm *vm;
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/* address where to copy page table entries from */
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uint64_t src;
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/* indirect buffer to fill with commands */
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struct amdgpu_ib *ib;
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/* Function which actually does the update */
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void (*func)(struct amdgpu_pte_update_params *params, 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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/* The next two are used during VM update by CPU
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* DMA addresses to use for mapping
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* Kernel pointer of PD/PT BO that needs to be updated
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*/
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dma_addr_t *pages_addr;
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void *kptr;
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};
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/* Helper to disable partial resident texture feature from a fence callback */
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struct amdgpu_prt_cb {
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struct amdgpu_device *adev;
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struct dma_fence_cb cb;
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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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*
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* Calculate 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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if (level == 0)
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/* For the root directory */
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return adev->vm_manager.max_pfn >>
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(adev->vm_manager.block_size *
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adev->vm_manager.num_level);
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else if (level == adev->vm_manager.num_level)
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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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else
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/* Everything in between */
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return 1 << adev->vm_manager.block_size;
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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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*
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* Calculate 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_get_pd_bo - add the VM PD to a validation list
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*
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* @vm: vm providing the BOs
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* @validated: head of validation list
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* @entry: entry to add
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*
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* Add the page directory to the list of BOs to
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* validate for command submission.
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*/
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void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
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struct list_head *validated,
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struct amdgpu_bo_list_entry *entry)
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{
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entry->robj = vm->root.base.bo;
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entry->priority = 0;
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entry->tv.bo = &entry->robj->tbo;
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entry->tv.shared = true;
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entry->user_pages = NULL;
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list_add(&entry->tv.head, validated);
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}
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/**
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* amdgpu_vm_validate_pt_bos - validate the page table BOs
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*
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* @adev: amdgpu device pointer
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* @vm: vm providing the BOs
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* @validate: callback to do the validation
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* @param: parameter for the validation callback
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*
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* Validate the page table BOs on command submission if neccessary.
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*/
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int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
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int (*validate)(void *p, struct amdgpu_bo *bo),
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void *param)
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{
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struct ttm_bo_global *glob = adev->mman.bdev.glob;
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int r;
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spin_lock(&vm->status_lock);
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while (!list_empty(&vm->evicted)) {
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struct amdgpu_vm_bo_base *bo_base;
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struct amdgpu_bo *bo;
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bo_base = list_first_entry(&vm->evicted,
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struct amdgpu_vm_bo_base,
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vm_status);
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spin_unlock(&vm->status_lock);
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bo = bo_base->bo;
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BUG_ON(!bo);
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if (bo->parent) {
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r = validate(param, bo);
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if (r)
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return r;
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spin_lock(&glob->lru_lock);
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ttm_bo_move_to_lru_tail(&bo->tbo);
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if (bo->shadow)
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ttm_bo_move_to_lru_tail(&bo->shadow->tbo);
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spin_unlock(&glob->lru_lock);
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}
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if (bo->tbo.type == ttm_bo_type_kernel &&
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vm->use_cpu_for_update) {
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r = amdgpu_bo_kmap(bo, NULL);
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if (r)
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return r;
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}
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spin_lock(&vm->status_lock);
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if (bo->tbo.type != ttm_bo_type_kernel)
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list_move(&bo_base->vm_status, &vm->moved);
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else
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list_move(&bo_base->vm_status, &vm->relocated);
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}
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spin_unlock(&vm->status_lock);
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return 0;
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}
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/**
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* amdgpu_vm_ready - check VM is ready for updates
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*
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* @vm: VM to check
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*
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* Check if all VM PDs/PTs are ready for updates
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*/
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bool amdgpu_vm_ready(struct amdgpu_vm *vm)
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{
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bool ready;
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spin_lock(&vm->status_lock);
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ready = list_empty(&vm->evicted);
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spin_unlock(&vm->status_lock);
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return ready;
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}
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/**
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* amdgpu_vm_alloc_levels - allocate the PD/PT levels
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*
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* @adev: amdgpu_device pointer
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* @vm: requested vm
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* @saddr: start of the address range
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* @eaddr: end of the address range
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*
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* Make sure the page directories and page tables are allocated
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*/
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static int amdgpu_vm_alloc_levels(struct amdgpu_device *adev,
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struct amdgpu_vm *vm,
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struct amdgpu_vm_pt *parent,
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uint64_t saddr, uint64_t eaddr,
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unsigned level)
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{
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unsigned shift = (adev->vm_manager.num_level - level) *
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adev->vm_manager.block_size;
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unsigned pt_idx, from, to;
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int r;
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u64 flags;
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uint64_t init_value = 0;
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if (!parent->entries) {
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unsigned num_entries = amdgpu_vm_num_entries(adev, level);
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parent->entries = kvmalloc_array(num_entries,
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sizeof(struct amdgpu_vm_pt),
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GFP_KERNEL | __GFP_ZERO);
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if (!parent->entries)
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return -ENOMEM;
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memset(parent->entries, 0 , sizeof(struct amdgpu_vm_pt));
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}
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from = saddr >> shift;
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to = eaddr >> shift;
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if (from >= amdgpu_vm_num_entries(adev, level) ||
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to >= amdgpu_vm_num_entries(adev, level))
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return -EINVAL;
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if (to > parent->last_entry_used)
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parent->last_entry_used = to;
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++level;
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saddr = saddr & ((1 << shift) - 1);
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eaddr = eaddr & ((1 << shift) - 1);
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flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
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AMDGPU_GEM_CREATE_VRAM_CLEARED;
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if (vm->use_cpu_for_update)
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flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
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else
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flags |= (AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
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AMDGPU_GEM_CREATE_SHADOW);
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if (vm->pte_support_ats) {
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init_value = AMDGPU_PTE_DEFAULT_ATC;
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if (level != adev->vm_manager.num_level - 1)
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init_value |= AMDGPU_PDE_PTE;
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}
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/* walk over the address space and allocate the page tables */
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for (pt_idx = from; pt_idx <= to; ++pt_idx) {
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struct reservation_object *resv = vm->root.base.bo->tbo.resv;
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struct amdgpu_vm_pt *entry = &parent->entries[pt_idx];
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struct amdgpu_bo *pt;
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if (!entry->base.bo) {
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r = amdgpu_bo_create(adev,
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amdgpu_vm_bo_size(adev, level),
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AMDGPU_GPU_PAGE_SIZE, true,
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AMDGPU_GEM_DOMAIN_VRAM,
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flags,
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NULL, resv, init_value, &pt);
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if (r)
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return r;
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if (vm->use_cpu_for_update) {
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r = amdgpu_bo_kmap(pt, NULL);
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if (r) {
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amdgpu_bo_unref(&pt);
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return r;
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}
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}
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/* Keep a reference to the root directory to avoid
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* freeing them up in the wrong order.
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*/
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pt->parent = amdgpu_bo_ref(parent->base.bo);
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entry->base.vm = vm;
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entry->base.bo = pt;
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list_add_tail(&entry->base.bo_list, &pt->va);
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spin_lock(&vm->status_lock);
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list_add(&entry->base.vm_status, &vm->relocated);
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spin_unlock(&vm->status_lock);
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entry->addr = 0;
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}
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if (level < adev->vm_manager.num_level) {
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uint64_t sub_saddr = (pt_idx == from) ? saddr : 0;
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uint64_t sub_eaddr = (pt_idx == to) ? eaddr :
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((1 << shift) - 1);
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r = amdgpu_vm_alloc_levels(adev, vm, entry, sub_saddr,
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sub_eaddr, level);
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if (r)
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return r;
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}
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}
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return 0;
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}
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/**
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* amdgpu_vm_alloc_pts - Allocate page tables.
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*
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* @adev: amdgpu_device pointer
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* @vm: VM to allocate page tables for
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* @saddr: Start address which needs to be allocated
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* @size: Size from start address we need.
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*
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* Make sure the page tables are allocated.
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*/
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int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
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struct amdgpu_vm *vm,
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uint64_t saddr, uint64_t size)
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{
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uint64_t last_pfn;
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uint64_t eaddr;
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/* validate the parameters */
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if (saddr & AMDGPU_GPU_PAGE_MASK || size & AMDGPU_GPU_PAGE_MASK)
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return -EINVAL;
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eaddr = saddr + size - 1;
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last_pfn = eaddr / AMDGPU_GPU_PAGE_SIZE;
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if (last_pfn >= adev->vm_manager.max_pfn) {
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dev_err(adev->dev, "va above limit (0x%08llX >= 0x%08llX)\n",
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last_pfn, adev->vm_manager.max_pfn);
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return -EINVAL;
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}
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saddr /= AMDGPU_GPU_PAGE_SIZE;
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eaddr /= AMDGPU_GPU_PAGE_SIZE;
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return amdgpu_vm_alloc_levels(adev, vm, &vm->root, saddr, eaddr, 0);
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}
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/**
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* amdgpu_vm_had_gpu_reset - check if reset occured since last use
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*
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* @adev: amdgpu_device pointer
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* @id: VMID structure
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*
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* Check if GPU reset occured since last use of the VMID.
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*/
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static bool amdgpu_vm_had_gpu_reset(struct amdgpu_device *adev,
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struct amdgpu_vm_id *id)
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{
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return id->current_gpu_reset_count !=
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atomic_read(&adev->gpu_reset_counter);
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}
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static bool amdgpu_vm_reserved_vmid_ready(struct amdgpu_vm *vm, unsigned vmhub)
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{
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return !!vm->reserved_vmid[vmhub];
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}
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|
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/* idr_mgr->lock must be held */
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static int amdgpu_vm_grab_reserved_vmid_locked(struct amdgpu_vm *vm,
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struct amdgpu_ring *ring,
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struct amdgpu_sync *sync,
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struct dma_fence *fence,
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struct amdgpu_job *job)
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{
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struct amdgpu_device *adev = ring->adev;
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unsigned vmhub = ring->funcs->vmhub;
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uint64_t fence_context = adev->fence_context + ring->idx;
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struct amdgpu_vm_id *id = vm->reserved_vmid[vmhub];
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struct amdgpu_vm_id_manager *id_mgr = &adev->vm_manager.id_mgr[vmhub];
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struct dma_fence *updates = sync->last_vm_update;
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int r = 0;
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struct dma_fence *flushed, *tmp;
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bool needs_flush = vm->use_cpu_for_update;
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flushed = id->flushed_updates;
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if ((amdgpu_vm_had_gpu_reset(adev, id)) ||
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(atomic64_read(&id->owner) != vm->client_id) ||
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(job->vm_pd_addr != id->pd_gpu_addr) ||
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(updates && (!flushed || updates->context != flushed->context ||
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dma_fence_is_later(updates, flushed))) ||
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(!id->last_flush || (id->last_flush->context != fence_context &&
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!dma_fence_is_signaled(id->last_flush)))) {
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needs_flush = true;
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/* to prevent one context starved by another context */
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id->pd_gpu_addr = 0;
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tmp = amdgpu_sync_peek_fence(&id->active, ring);
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if (tmp) {
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r = amdgpu_sync_fence(adev, sync, tmp);
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return r;
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}
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}
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/* Good we can use this VMID. Remember this submission as
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* user of the VMID.
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*/
|
|
r = amdgpu_sync_fence(ring->adev, &id->active, fence);
|
|
if (r)
|
|
goto out;
|
|
|
|
if (updates && (!flushed || updates->context != flushed->context ||
|
|
dma_fence_is_later(updates, flushed))) {
|
|
dma_fence_put(id->flushed_updates);
|
|
id->flushed_updates = dma_fence_get(updates);
|
|
}
|
|
id->pd_gpu_addr = job->vm_pd_addr;
|
|
atomic64_set(&id->owner, vm->client_id);
|
|
job->vm_needs_flush = needs_flush;
|
|
if (needs_flush) {
|
|
dma_fence_put(id->last_flush);
|
|
id->last_flush = NULL;
|
|
}
|
|
job->vm_id = id - id_mgr->ids;
|
|
trace_amdgpu_vm_grab_id(vm, ring, job);
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_grab_id - allocate the next free VMID
|
|
*
|
|
* @vm: vm to allocate id for
|
|
* @ring: ring we want to submit job to
|
|
* @sync: sync object where we add dependencies
|
|
* @fence: fence protecting ID from reuse
|
|
*
|
|
* Allocate an id for the vm, adding fences to the sync obj as necessary.
|
|
*/
|
|
int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
|
|
struct amdgpu_sync *sync, struct dma_fence *fence,
|
|
struct amdgpu_job *job)
|
|
{
|
|
struct amdgpu_device *adev = ring->adev;
|
|
unsigned vmhub = ring->funcs->vmhub;
|
|
struct amdgpu_vm_id_manager *id_mgr = &adev->vm_manager.id_mgr[vmhub];
|
|
uint64_t fence_context = adev->fence_context + ring->idx;
|
|
struct dma_fence *updates = sync->last_vm_update;
|
|
struct amdgpu_vm_id *id, *idle;
|
|
struct dma_fence **fences;
|
|
unsigned i;
|
|
int r = 0;
|
|
|
|
mutex_lock(&id_mgr->lock);
|
|
if (amdgpu_vm_reserved_vmid_ready(vm, vmhub)) {
|
|
r = amdgpu_vm_grab_reserved_vmid_locked(vm, ring, sync, fence, job);
|
|
mutex_unlock(&id_mgr->lock);
|
|
return r;
|
|
}
|
|
fences = kmalloc_array(sizeof(void *), id_mgr->num_ids, GFP_KERNEL);
|
|
if (!fences) {
|
|
mutex_unlock(&id_mgr->lock);
|
|
return -ENOMEM;
|
|
}
|
|
/* Check if we have an idle VMID */
|
|
i = 0;
|
|
list_for_each_entry(idle, &id_mgr->ids_lru, list) {
|
|
fences[i] = amdgpu_sync_peek_fence(&idle->active, ring);
|
|
if (!fences[i])
|
|
break;
|
|
++i;
|
|
}
|
|
|
|
/* If we can't find a idle VMID to use, wait till one becomes available */
|
|
if (&idle->list == &id_mgr->ids_lru) {
|
|
u64 fence_context = adev->vm_manager.fence_context + ring->idx;
|
|
unsigned seqno = ++adev->vm_manager.seqno[ring->idx];
|
|
struct dma_fence_array *array;
|
|
unsigned j;
|
|
|
|
for (j = 0; j < i; ++j)
|
|
dma_fence_get(fences[j]);
|
|
|
|
array = dma_fence_array_create(i, fences, fence_context,
|
|
seqno, true);
|
|
if (!array) {
|
|
for (j = 0; j < i; ++j)
|
|
dma_fence_put(fences[j]);
|
|
kfree(fences);
|
|
r = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
|
|
r = amdgpu_sync_fence(ring->adev, sync, &array->base);
|
|
dma_fence_put(&array->base);
|
|
if (r)
|
|
goto error;
|
|
|
|
mutex_unlock(&id_mgr->lock);
|
|
return 0;
|
|
|
|
}
|
|
kfree(fences);
|
|
|
|
job->vm_needs_flush = vm->use_cpu_for_update;
|
|
/* Check if we can use a VMID already assigned to this VM */
|
|
list_for_each_entry_reverse(id, &id_mgr->ids_lru, list) {
|
|
struct dma_fence *flushed;
|
|
bool needs_flush = vm->use_cpu_for_update;
|
|
|
|
/* Check all the prerequisites to using this VMID */
|
|
if (amdgpu_vm_had_gpu_reset(adev, id))
|
|
continue;
|
|
|
|
if (atomic64_read(&id->owner) != vm->client_id)
|
|
continue;
|
|
|
|
if (job->vm_pd_addr != id->pd_gpu_addr)
|
|
continue;
|
|
|
|
if (!id->last_flush ||
|
|
(id->last_flush->context != fence_context &&
|
|
!dma_fence_is_signaled(id->last_flush)))
|
|
needs_flush = true;
|
|
|
|
flushed = id->flushed_updates;
|
|
if (updates && (!flushed || dma_fence_is_later(updates, flushed)))
|
|
needs_flush = true;
|
|
|
|
/* Concurrent flushes are only possible starting with Vega10 */
|
|
if (adev->asic_type < CHIP_VEGA10 && needs_flush)
|
|
continue;
|
|
|
|
/* Good we can use this VMID. Remember this submission as
|
|
* user of the VMID.
|
|
*/
|
|
r = amdgpu_sync_fence(ring->adev, &id->active, fence);
|
|
if (r)
|
|
goto error;
|
|
|
|
if (updates && (!flushed || dma_fence_is_later(updates, flushed))) {
|
|
dma_fence_put(id->flushed_updates);
|
|
id->flushed_updates = dma_fence_get(updates);
|
|
}
|
|
|
|
if (needs_flush)
|
|
goto needs_flush;
|
|
else
|
|
goto no_flush_needed;
|
|
|
|
};
|
|
|
|
/* Still no ID to use? Then use the idle one found earlier */
|
|
id = idle;
|
|
|
|
/* Remember this submission as user of the VMID */
|
|
r = amdgpu_sync_fence(ring->adev, &id->active, fence);
|
|
if (r)
|
|
goto error;
|
|
|
|
id->pd_gpu_addr = job->vm_pd_addr;
|
|
dma_fence_put(id->flushed_updates);
|
|
id->flushed_updates = dma_fence_get(updates);
|
|
atomic64_set(&id->owner, vm->client_id);
|
|
|
|
needs_flush:
|
|
job->vm_needs_flush = true;
|
|
dma_fence_put(id->last_flush);
|
|
id->last_flush = NULL;
|
|
|
|
no_flush_needed:
|
|
list_move_tail(&id->list, &id_mgr->ids_lru);
|
|
|
|
job->vm_id = id - id_mgr->ids;
|
|
trace_amdgpu_vm_grab_id(vm, ring, job);
|
|
|
|
error:
|
|
mutex_unlock(&id_mgr->lock);
|
|
return r;
|
|
}
|
|
|
|
static void amdgpu_vm_free_reserved_vmid(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm,
|
|
unsigned vmhub)
|
|
{
|
|
struct amdgpu_vm_id_manager *id_mgr = &adev->vm_manager.id_mgr[vmhub];
|
|
|
|
mutex_lock(&id_mgr->lock);
|
|
if (vm->reserved_vmid[vmhub]) {
|
|
list_add(&vm->reserved_vmid[vmhub]->list,
|
|
&id_mgr->ids_lru);
|
|
vm->reserved_vmid[vmhub] = NULL;
|
|
atomic_dec(&id_mgr->reserved_vmid_num);
|
|
}
|
|
mutex_unlock(&id_mgr->lock);
|
|
}
|
|
|
|
static int amdgpu_vm_alloc_reserved_vmid(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm,
|
|
unsigned vmhub)
|
|
{
|
|
struct amdgpu_vm_id_manager *id_mgr;
|
|
struct amdgpu_vm_id *idle;
|
|
int r = 0;
|
|
|
|
id_mgr = &adev->vm_manager.id_mgr[vmhub];
|
|
mutex_lock(&id_mgr->lock);
|
|
if (vm->reserved_vmid[vmhub])
|
|
goto unlock;
|
|
if (atomic_inc_return(&id_mgr->reserved_vmid_num) >
|
|
AMDGPU_VM_MAX_RESERVED_VMID) {
|
|
DRM_ERROR("Over limitation of reserved vmid\n");
|
|
atomic_dec(&id_mgr->reserved_vmid_num);
|
|
r = -EINVAL;
|
|
goto unlock;
|
|
}
|
|
/* Select the first entry VMID */
|
|
idle = list_first_entry(&id_mgr->ids_lru, struct amdgpu_vm_id, list);
|
|
list_del_init(&idle->list);
|
|
vm->reserved_vmid[vmhub] = idle;
|
|
mutex_unlock(&id_mgr->lock);
|
|
|
|
return 0;
|
|
unlock:
|
|
mutex_unlock(&id_mgr->lock);
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* 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_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;
|
|
}
|
|
}
|
|
|
|
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_vm_id_manager *id_mgr = &adev->vm_manager.id_mgr[vmhub];
|
|
struct amdgpu_vm_id *id;
|
|
bool gds_switch_needed;
|
|
bool vm_flush_needed = job->vm_needs_flush || ring->has_compute_vm_bug;
|
|
|
|
if (job->vm_id == 0)
|
|
return false;
|
|
id = &id_mgr->ids[job->vm_id];
|
|
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_vm_had_gpu_reset(adev, id))
|
|
return true;
|
|
|
|
return vm_flush_needed || gds_switch_needed;
|
|
}
|
|
|
|
static bool amdgpu_vm_is_large_bar(struct amdgpu_device *adev)
|
|
{
|
|
return (adev->mc.real_vram_size == adev->mc.visible_vram_size);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_flush - hardware flush the vm
|
|
*
|
|
* @ring: ring to use for flush
|
|
* @vm_id: vmid number to use
|
|
* @pd_addr: address of the page directory
|
|
*
|
|
* Emit a VM flush when it is necessary.
|
|
*/
|
|
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_vm_id_manager *id_mgr = &adev->vm_manager.id_mgr[vmhub];
|
|
struct amdgpu_vm_id *id = &id_mgr->ids[job->vm_id];
|
|
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;
|
|
unsigned patch_offset = 0;
|
|
int r;
|
|
|
|
if (amdgpu_vm_had_gpu_reset(adev, id)) {
|
|
gds_switch_needed = true;
|
|
vm_flush_needed = true;
|
|
}
|
|
|
|
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 (ring->funcs->emit_vm_flush && vm_flush_needed) {
|
|
struct dma_fence *fence;
|
|
|
|
trace_amdgpu_vm_flush(ring, job->vm_id, job->vm_pd_addr);
|
|
amdgpu_ring_emit_vm_flush(ring, job->vm_id, job->vm_pd_addr);
|
|
|
|
r = amdgpu_fence_emit(ring, &fence);
|
|
if (r)
|
|
return r;
|
|
|
|
mutex_lock(&id_mgr->lock);
|
|
dma_fence_put(id->last_flush);
|
|
id->last_flush = fence;
|
|
id->current_gpu_reset_count = atomic_read(&adev->gpu_reset_counter);
|
|
mutex_unlock(&id_mgr->lock);
|
|
}
|
|
|
|
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->vm_id, 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_reset_id - reset VMID to zero
|
|
*
|
|
* @adev: amdgpu device structure
|
|
* @vm_id: vmid number to use
|
|
*
|
|
* Reset saved GDW, GWS and OA to force switch on next flush.
|
|
*/
|
|
void amdgpu_vm_reset_id(struct amdgpu_device *adev, unsigned vmhub,
|
|
unsigned vmid)
|
|
{
|
|
struct amdgpu_vm_id_manager *id_mgr = &adev->vm_manager.id_mgr[vmhub];
|
|
struct amdgpu_vm_id *id = &id_mgr->ids[vmid];
|
|
|
|
atomic64_set(&id->owner, 0);
|
|
id->gds_base = 0;
|
|
id->gds_size = 0;
|
|
id->gws_base = 0;
|
|
id->gws_size = 0;
|
|
id->oa_base = 0;
|
|
id->oa_size = 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_reset_all_id - reset VMID to zero
|
|
*
|
|
* @adev: amdgpu device structure
|
|
*
|
|
* Reset VMID to force flush on next use
|
|
*/
|
|
void amdgpu_vm_reset_all_ids(struct amdgpu_device *adev)
|
|
{
|
|
unsigned i, j;
|
|
|
|
for (i = 0; i < AMDGPU_MAX_VMHUBS; ++i) {
|
|
struct amdgpu_vm_id_manager *id_mgr =
|
|
&adev->vm_manager.id_mgr[i];
|
|
|
|
for (j = 1; j < id_mgr->num_ids; ++j)
|
|
amdgpu_vm_reset_id(adev, i, j);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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!
|
|
*/
|
|
struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
|
|
struct amdgpu_bo *bo)
|
|
{
|
|
struct amdgpu_bo_va *bo_va;
|
|
|
|
list_for_each_entry(bo_va, &bo->va, base.bo_list) {
|
|
if (bo_va->base.vm == vm) {
|
|
return bo_va;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_do_set_ptes - helper to call the right asic function
|
|
*
|
|
* @params: see amdgpu_pte_update_params definition
|
|
* @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,
|
|
uint64_t pe, uint64_t addr,
|
|
unsigned count, uint32_t incr,
|
|
uint64_t flags)
|
|
{
|
|
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
|
|
* @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,
|
|
uint64_t pe, uint64_t addr,
|
|
unsigned count, uint32_t incr,
|
|
uint64_t flags)
|
|
{
|
|
uint64_t src = (params->src + (addr >> 12) * 8);
|
|
|
|
|
|
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 and return 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
|
|
* @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,
|
|
uint64_t pe, uint64_t addr,
|
|
unsigned count, uint32_t incr,
|
|
uint64_t flags)
|
|
{
|
|
unsigned int i;
|
|
uint64_t value;
|
|
|
|
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_gart_set_pte_pde(params->adev, (void *)(uintptr_t)pe,
|
|
i, value, flags);
|
|
addr += incr;
|
|
}
|
|
}
|
|
|
|
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_level - update a single level in the hierarchy
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
* @parent: parent directory
|
|
*
|
|
* Makes sure all entries in @parent are up to date.
|
|
* Returns 0 for success, error for failure.
|
|
*/
|
|
static int amdgpu_vm_update_level(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm,
|
|
struct amdgpu_vm_pt *parent)
|
|
{
|
|
struct amdgpu_bo *shadow;
|
|
struct amdgpu_ring *ring = NULL;
|
|
uint64_t pd_addr, shadow_addr = 0;
|
|
uint64_t last_pde = ~0, last_pt = ~0, last_shadow = ~0;
|
|
unsigned count = 0, pt_idx, ndw = 0;
|
|
struct amdgpu_job *job;
|
|
struct amdgpu_pte_update_params params;
|
|
struct dma_fence *fence = NULL;
|
|
uint32_t incr;
|
|
|
|
int r;
|
|
|
|
if (!parent->entries)
|
|
return 0;
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
params.adev = adev;
|
|
shadow = parent->base.bo->shadow;
|
|
|
|
if (vm->use_cpu_for_update) {
|
|
pd_addr = (unsigned long)amdgpu_bo_kptr(parent->base.bo);
|
|
r = amdgpu_vm_wait_pd(adev, vm, AMDGPU_FENCE_OWNER_VM);
|
|
if (unlikely(r))
|
|
return r;
|
|
|
|
params.func = amdgpu_vm_cpu_set_ptes;
|
|
} else {
|
|
ring = container_of(vm->entity.sched, struct amdgpu_ring,
|
|
sched);
|
|
|
|
/* padding, etc. */
|
|
ndw = 64;
|
|
|
|
/* assume the worst case */
|
|
ndw += parent->last_entry_used * 6;
|
|
|
|
pd_addr = amdgpu_bo_gpu_offset(parent->base.bo);
|
|
|
|
if (shadow) {
|
|
shadow_addr = amdgpu_bo_gpu_offset(shadow);
|
|
ndw *= 2;
|
|
} else {
|
|
shadow_addr = 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
/* walk over the address space and update the directory */
|
|
for (pt_idx = 0; pt_idx <= parent->last_entry_used; ++pt_idx) {
|
|
struct amdgpu_vm_pt *entry = &parent->entries[pt_idx];
|
|
struct amdgpu_bo *bo = entry->base.bo;
|
|
uint64_t pde, pt;
|
|
|
|
if (bo == NULL)
|
|
continue;
|
|
|
|
spin_lock(&vm->status_lock);
|
|
list_del_init(&entry->base.vm_status);
|
|
spin_unlock(&vm->status_lock);
|
|
|
|
pt = amdgpu_bo_gpu_offset(bo);
|
|
pt = amdgpu_gart_get_vm_pde(adev, pt);
|
|
/* Don't update huge pages here */
|
|
if ((parent->entries[pt_idx].addr & AMDGPU_PDE_PTE) ||
|
|
parent->entries[pt_idx].addr == (pt | AMDGPU_PTE_VALID))
|
|
continue;
|
|
|
|
parent->entries[pt_idx].addr = pt | AMDGPU_PTE_VALID;
|
|
|
|
pde = pd_addr + pt_idx * 8;
|
|
incr = amdgpu_bo_size(bo);
|
|
if (((last_pde + 8 * count) != pde) ||
|
|
((last_pt + incr * count) != pt) ||
|
|
(count == AMDGPU_VM_MAX_UPDATE_SIZE)) {
|
|
|
|
if (count) {
|
|
if (shadow)
|
|
params.func(¶ms,
|
|
last_shadow,
|
|
last_pt, count,
|
|
incr,
|
|
AMDGPU_PTE_VALID);
|
|
|
|
params.func(¶ms, last_pde,
|
|
last_pt, count, incr,
|
|
AMDGPU_PTE_VALID);
|
|
}
|
|
|
|
count = 1;
|
|
last_pde = pde;
|
|
last_shadow = shadow_addr + pt_idx * 8;
|
|
last_pt = pt;
|
|
} else {
|
|
++count;
|
|
}
|
|
}
|
|
|
|
if (count) {
|
|
if (vm->root.base.bo->shadow)
|
|
params.func(¶ms, last_shadow, last_pt,
|
|
count, incr, AMDGPU_PTE_VALID);
|
|
|
|
params.func(¶ms, last_pde, last_pt,
|
|
count, incr, AMDGPU_PTE_VALID);
|
|
}
|
|
|
|
if (!vm->use_cpu_for_update) {
|
|
if (params.ib->length_dw == 0) {
|
|
amdgpu_job_free(job);
|
|
} else {
|
|
amdgpu_ring_pad_ib(ring, params.ib);
|
|
amdgpu_sync_resv(adev, &job->sync,
|
|
parent->base.bo->tbo.resv,
|
|
AMDGPU_FENCE_OWNER_VM, false);
|
|
if (shadow)
|
|
amdgpu_sync_resv(adev, &job->sync,
|
|
shadow->tbo.resv,
|
|
AMDGPU_FENCE_OWNER_VM, false);
|
|
|
|
WARN_ON(params.ib->length_dw > ndw);
|
|
r = amdgpu_job_submit(job, ring, &vm->entity,
|
|
AMDGPU_FENCE_OWNER_VM, &fence);
|
|
if (r)
|
|
goto error_free;
|
|
|
|
amdgpu_bo_fence(parent->base.bo, fence, true);
|
|
dma_fence_put(vm->last_update);
|
|
vm->last_update = fence;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
error_free:
|
|
amdgpu_job_free(job);
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* amdgpu_vm_invalidate_level - mark all PD levels as invalid
|
|
*
|
|
* @parent: parent PD
|
|
*
|
|
* Mark all PD level as invalid after an error.
|
|
*/
|
|
static void amdgpu_vm_invalidate_level(struct amdgpu_vm *vm,
|
|
struct amdgpu_vm_pt *parent)
|
|
{
|
|
unsigned pt_idx;
|
|
|
|
/*
|
|
* Recurse into the subdirectories. This recursion is harmless because
|
|
* we only have a maximum of 5 layers.
|
|
*/
|
|
for (pt_idx = 0; pt_idx <= parent->last_entry_used; ++pt_idx) {
|
|
struct amdgpu_vm_pt *entry = &parent->entries[pt_idx];
|
|
|
|
if (!entry->base.bo)
|
|
continue;
|
|
|
|
entry->addr = ~0ULL;
|
|
spin_lock(&vm->status_lock);
|
|
if (list_empty(&entry->base.vm_status))
|
|
list_add(&entry->base.vm_status, &vm->relocated);
|
|
spin_unlock(&vm->status_lock);
|
|
amdgpu_vm_invalidate_level(vm, entry);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
int r;
|
|
|
|
spin_lock(&vm->status_lock);
|
|
while (!list_empty(&vm->relocated)) {
|
|
struct amdgpu_vm_bo_base *bo_base;
|
|
struct amdgpu_bo *bo;
|
|
|
|
bo_base = list_first_entry(&vm->relocated,
|
|
struct amdgpu_vm_bo_base,
|
|
vm_status);
|
|
spin_unlock(&vm->status_lock);
|
|
|
|
bo = bo_base->bo->parent;
|
|
if (bo) {
|
|
struct amdgpu_vm_bo_base *parent;
|
|
struct amdgpu_vm_pt *pt;
|
|
|
|
parent = list_first_entry(&bo->va,
|
|
struct amdgpu_vm_bo_base,
|
|
bo_list);
|
|
pt = container_of(parent, struct amdgpu_vm_pt, base);
|
|
|
|
r = amdgpu_vm_update_level(adev, vm, pt);
|
|
if (r) {
|
|
amdgpu_vm_invalidate_level(vm, &vm->root);
|
|
return r;
|
|
}
|
|
spin_lock(&vm->status_lock);
|
|
} else {
|
|
spin_lock(&vm->status_lock);
|
|
list_del_init(&bo_base->vm_status);
|
|
}
|
|
}
|
|
spin_unlock(&vm->status_lock);
|
|
|
|
if (vm->use_cpu_for_update) {
|
|
/* Flush HDP */
|
|
mb();
|
|
amdgpu_gart_flush_gpu_tlb(adev, 0);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_find_entry - find the entry for an address
|
|
*
|
|
* @p: see amdgpu_pte_update_params definition
|
|
* @addr: virtual address in question
|
|
* @entry: resulting entry or NULL
|
|
* @parent: parent entry
|
|
*
|
|
* Find the vm_pt entry and it's parent for the given address.
|
|
*/
|
|
void amdgpu_vm_get_entry(struct amdgpu_pte_update_params *p, uint64_t addr,
|
|
struct amdgpu_vm_pt **entry,
|
|
struct amdgpu_vm_pt **parent)
|
|
{
|
|
unsigned idx, level = p->adev->vm_manager.num_level;
|
|
|
|
*parent = NULL;
|
|
*entry = &p->vm->root;
|
|
while ((*entry)->entries) {
|
|
idx = addr >> (p->adev->vm_manager.block_size * level--);
|
|
idx %= amdgpu_bo_size((*entry)->base.bo) / 8;
|
|
*parent = *entry;
|
|
*entry = &(*entry)->entries[idx];
|
|
}
|
|
|
|
if (level)
|
|
*entry = NULL;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_handle_huge_pages - handle updating the PD with huge pages
|
|
*
|
|
* @p: see amdgpu_pte_update_params definition
|
|
* @entry: vm_pt entry to check
|
|
* @parent: parent entry
|
|
* @nptes: number of PTEs updated with this operation
|
|
* @dst: destination address where the PTEs should point to
|
|
* @flags: access flags fro the PTEs
|
|
*
|
|
* Check if we can update the PD with a huge page.
|
|
*/
|
|
static void amdgpu_vm_handle_huge_pages(struct amdgpu_pte_update_params *p,
|
|
struct amdgpu_vm_pt *entry,
|
|
struct amdgpu_vm_pt *parent,
|
|
unsigned nptes, uint64_t dst,
|
|
uint64_t flags)
|
|
{
|
|
bool use_cpu_update = (p->func == amdgpu_vm_cpu_set_ptes);
|
|
uint64_t pd_addr, pde;
|
|
|
|
/* In the case of a mixed PT the PDE must point to it*/
|
|
if (p->adev->asic_type < CHIP_VEGA10 ||
|
|
nptes != AMDGPU_VM_PTE_COUNT(p->adev) ||
|
|
p->src ||
|
|
!(flags & AMDGPU_PTE_VALID)) {
|
|
|
|
dst = amdgpu_bo_gpu_offset(entry->base.bo);
|
|
dst = amdgpu_gart_get_vm_pde(p->adev, dst);
|
|
flags = AMDGPU_PTE_VALID;
|
|
} else {
|
|
/* Set the huge page flag to stop scanning at this PDE */
|
|
flags |= AMDGPU_PDE_PTE;
|
|
}
|
|
|
|
if (entry->addr == (dst | flags))
|
|
return;
|
|
|
|
entry->addr = (dst | flags);
|
|
|
|
if (use_cpu_update) {
|
|
/* In case a huge page is replaced with a system
|
|
* memory mapping, p->pages_addr != NULL and
|
|
* amdgpu_vm_cpu_set_ptes would try to translate dst
|
|
* through amdgpu_vm_map_gart. But dst is already a
|
|
* GPU address (of the page table). Disable
|
|
* amdgpu_vm_map_gart temporarily.
|
|
*/
|
|
dma_addr_t *tmp;
|
|
|
|
tmp = p->pages_addr;
|
|
p->pages_addr = NULL;
|
|
|
|
pd_addr = (unsigned long)amdgpu_bo_kptr(parent->base.bo);
|
|
pde = pd_addr + (entry - parent->entries) * 8;
|
|
amdgpu_vm_cpu_set_ptes(p, pde, dst, 1, 0, flags);
|
|
|
|
p->pages_addr = tmp;
|
|
} else {
|
|
if (parent->base.bo->shadow) {
|
|
pd_addr = amdgpu_bo_gpu_offset(parent->base.bo->shadow);
|
|
pde = pd_addr + (entry - parent->entries) * 8;
|
|
amdgpu_vm_do_set_ptes(p, pde, dst, 1, 0, flags);
|
|
}
|
|
pd_addr = amdgpu_bo_gpu_offset(parent->base.bo);
|
|
pde = pd_addr + (entry - parent->entries) * 8;
|
|
amdgpu_vm_do_set_ptes(p, pde, dst, 1, 0, flags);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_update_ptes - make sure that page tables are valid
|
|
*
|
|
* @params: see amdgpu_pte_update_params definition
|
|
* @vm: requested vm
|
|
* @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;
|
|
const uint64_t mask = AMDGPU_VM_PTE_COUNT(adev) - 1;
|
|
|
|
uint64_t addr, pe_start;
|
|
struct amdgpu_bo *pt;
|
|
unsigned nptes;
|
|
bool use_cpu_update = (params->func == amdgpu_vm_cpu_set_ptes);
|
|
|
|
/* walk over the address space and update the page tables */
|
|
for (addr = start; addr < end; addr += nptes,
|
|
dst += nptes * AMDGPU_GPU_PAGE_SIZE) {
|
|
struct amdgpu_vm_pt *entry, *parent;
|
|
|
|
amdgpu_vm_get_entry(params, addr, &entry, &parent);
|
|
if (!entry)
|
|
return -ENOENT;
|
|
|
|
if ((addr & ~mask) == (end & ~mask))
|
|
nptes = end - addr;
|
|
else
|
|
nptes = AMDGPU_VM_PTE_COUNT(adev) - (addr & mask);
|
|
|
|
amdgpu_vm_handle_huge_pages(params, entry, parent,
|
|
nptes, dst, flags);
|
|
/* We don't need to update PTEs for huge pages */
|
|
if (entry->addr & AMDGPU_PDE_PTE)
|
|
continue;
|
|
|
|
pt = entry->base.bo;
|
|
if (use_cpu_update) {
|
|
pe_start = (unsigned long)amdgpu_bo_kptr(pt);
|
|
} else {
|
|
if (pt->shadow) {
|
|
pe_start = amdgpu_bo_gpu_offset(pt->shadow);
|
|
pe_start += (addr & mask) * 8;
|
|
params->func(params, pe_start, dst, nptes,
|
|
AMDGPU_GPU_PAGE_SIZE, flags);
|
|
}
|
|
pe_start = amdgpu_bo_gpu_offset(pt);
|
|
}
|
|
|
|
pe_start += (addr & mask) * 8;
|
|
params->func(params, pe_start, dst, nptes,
|
|
AMDGPU_GPU_PAGE_SIZE, flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* amdgpu_vm_frag_ptes - add fragment information to PTEs
|
|
*
|
|
* @params: see amdgpu_pte_update_params definition
|
|
* @vm: requested vm
|
|
* @start: first PTE to handle
|
|
* @end: last PTE to handle
|
|
* @dst: addr those PTEs should point to
|
|
* @flags: hw mapping flags
|
|
* Returns 0 for success, -EINVAL for failure.
|
|
*/
|
|
static int amdgpu_vm_frag_ptes(struct amdgpu_pte_update_params *params,
|
|
uint64_t start, uint64_t end,
|
|
uint64_t dst, uint64_t flags)
|
|
{
|
|
/**
|
|
* 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.
|
|
*/
|
|
unsigned max_frag = params->adev->vm_manager.fragment_size;
|
|
int r;
|
|
|
|
/* system pages are non continuously */
|
|
if (params->src || !(flags & AMDGPU_PTE_VALID))
|
|
return amdgpu_vm_update_ptes(params, start, end, dst, flags);
|
|
|
|
while (start != end) {
|
|
uint64_t frag_flags, frag_end;
|
|
unsigned frag;
|
|
|
|
/* 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_flags = AMDGPU_PTE_FRAG(max_frag);
|
|
frag_end = end & ~((1ULL << max_frag) - 1);
|
|
} else {
|
|
frag_flags = AMDGPU_PTE_FRAG(frag);
|
|
frag_end = start + (1 << frag);
|
|
}
|
|
|
|
r = amdgpu_vm_update_ptes(params, start, frag_end, dst,
|
|
flags | frag_flags);
|
|
if (r)
|
|
return r;
|
|
|
|
dst += (frag_end - start) * AMDGPU_GPU_PAGE_SIZE;
|
|
start = frag_end;
|
|
}
|
|
|
|
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_frag_ptes(¶ms, start, last + 1,
|
|
addr, flags);
|
|
}
|
|
|
|
ring = container_of(vm->entity.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.
|
|
*/
|
|
ncmds = ((nptes >> min(adev->vm_manager.block_size, 11u)) + 1) * 2;
|
|
|
|
/* padding, etc. */
|
|
ndw = 64;
|
|
|
|
/* one PDE write for each huge page */
|
|
ndw += ((nptes >> adev->vm_manager.block_size) + 1) * 6;
|
|
|
|
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 * adev->vm_manager.vm_pte_funcs->set_pte_pde_num_dw;
|
|
|
|
/* extra commands for begin/end fragments */
|
|
ndw += 2 * adev->vm_manager.vm_pte_funcs->set_pte_pde_num_dw
|
|
* 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);
|
|
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_frag_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, ring, &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);
|
|
amdgpu_vm_invalidate_level(vm, &vm->root);
|
|
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) *
|
|
(PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE);
|
|
} 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; ++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;
|
|
}
|
|
|
|
} 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;
|
|
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_va->base.bo) {
|
|
mem = NULL;
|
|
nodes = NULL;
|
|
exclusive = NULL;
|
|
} else {
|
|
struct ttm_dma_tt *ttm;
|
|
|
|
mem = &bo_va->base.bo->tbo.mem;
|
|
nodes = mem->mm_node;
|
|
if (mem->mem_type == TTM_PL_TT) {
|
|
ttm = container_of(bo_va->base.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_gart_flush_gpu_tlb(adev, 0);
|
|
}
|
|
|
|
spin_lock(&vm->status_lock);
|
|
list_del_init(&bo_va->base.vm_status);
|
|
spin_unlock(&vm->status_lock);
|
|
|
|
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
|
|
*/
|
|
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->gart.gart_funcs->set_prt(adev, enable);
|
|
spin_unlock_irqrestore(&adev->vm_manager.prt_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_prt_get - add a PRT user
|
|
*/
|
|
static void amdgpu_vm_prt_get(struct amdgpu_device *adev)
|
|
{
|
|
if (!adev->gart.gart_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
|
|
*/
|
|
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
|
|
*/
|
|
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
|
|
*/
|
|
static void amdgpu_vm_add_prt_cb(struct amdgpu_device *adev,
|
|
struct dma_fence *fence)
|
|
{
|
|
struct amdgpu_prt_cb *cb;
|
|
|
|
if (!adev->gart.gart_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.
|
|
* Returns 0 for success.
|
|
*
|
|
* PTs have to be reserved and mutex must be locked!
|
|
*/
|
|
int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
|
|
struct amdgpu_vm *vm,
|
|
struct dma_fence **fence)
|
|
{
|
|
struct amdgpu_bo_va_mapping *mapping;
|
|
struct dma_fence *f = NULL;
|
|
int r;
|
|
uint64_t init_pte_value = 0;
|
|
|
|
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)
|
|
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
|
|
* @sync: sync object to add fences to
|
|
*
|
|
* 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)
|
|
{
|
|
bool clear;
|
|
int r = 0;
|
|
|
|
spin_lock(&vm->status_lock);
|
|
while (!list_empty(&vm->moved)) {
|
|
struct amdgpu_bo_va *bo_va;
|
|
|
|
bo_va = list_first_entry(&vm->moved,
|
|
struct amdgpu_bo_va, base.vm_status);
|
|
spin_unlock(&vm->status_lock);
|
|
|
|
/* Per VM BOs never need to bo cleared in the page tables */
|
|
clear = bo_va->base.bo->tbo.resv != vm->root.base.bo->tbo.resv;
|
|
|
|
r = amdgpu_vm_bo_update(adev, bo_va, clear);
|
|
if (r)
|
|
return r;
|
|
|
|
spin_lock(&vm->status_lock);
|
|
}
|
|
spin_unlock(&vm->status_lock);
|
|
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
bo_va->base.vm = vm;
|
|
bo_va->base.bo = bo;
|
|
INIT_LIST_HEAD(&bo_va->base.bo_list);
|
|
INIT_LIST_HEAD(&bo_va->base.vm_status);
|
|
|
|
bo_va->ref_count = 1;
|
|
INIT_LIST_HEAD(&bo_va->valids);
|
|
INIT_LIST_HEAD(&bo_va->invalids);
|
|
|
|
if (bo)
|
|
list_add_tail(&bo_va->base.bo_list, &bo->va);
|
|
|
|
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) {
|
|
spin_lock(&vm->status_lock);
|
|
if (list_empty(&bo_va->base.vm_status))
|
|
list_add(&bo_va->base.vm_status, &vm->moved);
|
|
spin_unlock(&vm->status_lock);
|
|
}
|
|
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
|
|
* @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
|
|
* @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;
|
|
list_add(&before->list, &tmp->list);
|
|
}
|
|
|
|
/* 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;
|
|
list_add(&after->list, &tmp->list);
|
|
}
|
|
|
|
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
|
|
*
|
|
* Find a mapping by it's address.
|
|
*/
|
|
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_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_vm *vm = bo_va->base.vm;
|
|
|
|
list_del(&bo_va->base.bo_list);
|
|
|
|
spin_lock(&vm->status_lock);
|
|
list_del(&bo_va->base.vm_status);
|
|
spin_unlock(&vm->status_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
|
|
* @vm: requested vm
|
|
* @bo: amdgpu buffer object
|
|
*
|
|
* 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;
|
|
|
|
list_for_each_entry(bo_base, &bo->va, bo_list) {
|
|
struct amdgpu_vm *vm = bo_base->vm;
|
|
|
|
bo_base->moved = true;
|
|
if (evicted && bo->tbo.resv == vm->root.base.bo->tbo.resv) {
|
|
spin_lock(&bo_base->vm->status_lock);
|
|
if (bo->tbo.type == ttm_bo_type_kernel)
|
|
list_move(&bo_base->vm_status, &vm->evicted);
|
|
else
|
|
list_move_tail(&bo_base->vm_status,
|
|
&vm->evicted);
|
|
spin_unlock(&bo_base->vm->status_lock);
|
|
continue;
|
|
}
|
|
|
|
if (bo->tbo.type == ttm_bo_type_kernel) {
|
|
spin_lock(&bo_base->vm->status_lock);
|
|
if (list_empty(&bo_base->vm_status))
|
|
list_add(&bo_base->vm_status, &vm->relocated);
|
|
spin_unlock(&bo_base->vm->status_lock);
|
|
continue;
|
|
}
|
|
|
|
spin_lock(&bo_base->vm->status_lock);
|
|
if (list_empty(&bo_base->vm_status))
|
|
list_add(&bo_base->vm_status, &vm->moved);
|
|
spin_unlock(&bo_base->vm->status_lock);
|
|
}
|
|
}
|
|
|
|
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_set_fragment_size - adjust fragment size in PTE
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @fragment_size_default: the default fragment size if it's set auto
|
|
*/
|
|
void amdgpu_vm_set_fragment_size(struct amdgpu_device *adev,
|
|
uint32_t fragment_size_default)
|
|
{
|
|
if (amdgpu_vm_fragment_size == -1)
|
|
adev->vm_manager.fragment_size = fragment_size_default;
|
|
else
|
|
adev->vm_manager.fragment_size = amdgpu_vm_fragment_size;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_adjust_size - adjust vm size, block size and fragment size
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm_size: the default vm size if it's set auto
|
|
*/
|
|
void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint64_t vm_size,
|
|
uint32_t fragment_size_default)
|
|
{
|
|
/* adjust vm size firstly */
|
|
if (amdgpu_vm_size == -1)
|
|
adev->vm_manager.vm_size = vm_size;
|
|
else
|
|
adev->vm_manager.vm_size = amdgpu_vm_size;
|
|
|
|
/* block size depends on vm size */
|
|
if (amdgpu_vm_block_size == -1)
|
|
adev->vm_manager.block_size =
|
|
amdgpu_vm_get_block_size(adev->vm_manager.vm_size);
|
|
else
|
|
adev->vm_manager.block_size = amdgpu_vm_block_size;
|
|
|
|
amdgpu_vm_set_fragment_size(adev, fragment_size_default);
|
|
|
|
DRM_INFO("vm size is %llu GB, block size is %u-bit, fragment size is %u-bit\n",
|
|
adev->vm_manager.vm_size, adev->vm_manager.block_size,
|
|
adev->vm_manager.fragment_size);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_init - initialize a vm instance
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @vm: requested vm
|
|
* @vm_context: Indicates if it GFX or Compute context
|
|
*
|
|
* Init @vm fields.
|
|
*/
|
|
int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
|
|
int vm_context, unsigned int pasid)
|
|
{
|
|
const unsigned align = min(AMDGPU_VM_PTB_ALIGN_SIZE,
|
|
AMDGPU_VM_PTE_COUNT(adev) * 8);
|
|
unsigned ring_instance;
|
|
struct amdgpu_ring *ring;
|
|
struct amd_sched_rq *rq;
|
|
int r, i;
|
|
u64 flags;
|
|
uint64_t init_pde_value = 0;
|
|
|
|
vm->va = RB_ROOT_CACHED;
|
|
vm->client_id = atomic64_inc_return(&adev->vm_manager.client_counter);
|
|
for (i = 0; i < AMDGPU_MAX_VMHUBS; i++)
|
|
vm->reserved_vmid[i] = NULL;
|
|
spin_lock_init(&vm->status_lock);
|
|
INIT_LIST_HEAD(&vm->evicted);
|
|
INIT_LIST_HEAD(&vm->relocated);
|
|
INIT_LIST_HEAD(&vm->moved);
|
|
INIT_LIST_HEAD(&vm->freed);
|
|
|
|
/* create scheduler entity for page table updates */
|
|
|
|
ring_instance = atomic_inc_return(&adev->vm_manager.vm_pte_next_ring);
|
|
ring_instance %= adev->vm_manager.vm_pte_num_rings;
|
|
ring = adev->vm_manager.vm_pte_rings[ring_instance];
|
|
rq = &ring->sched.sched_rq[AMD_SCHED_PRIORITY_KERNEL];
|
|
r = amd_sched_entity_init(&ring->sched, &vm->entity,
|
|
rq, amdgpu_sched_jobs);
|
|
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;
|
|
init_pde_value = AMDGPU_PTE_DEFAULT_ATC
|
|
| AMDGPU_PDE_PTE;
|
|
|
|
}
|
|
} 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_vm_is_large_bar(adev)),
|
|
"CPU update of VM recommended only for large BAR system\n");
|
|
vm->last_update = NULL;
|
|
|
|
flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
|
|
AMDGPU_GEM_CREATE_VRAM_CLEARED;
|
|
if (vm->use_cpu_for_update)
|
|
flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
|
|
else
|
|
flags |= (AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
|
|
AMDGPU_GEM_CREATE_SHADOW);
|
|
|
|
r = amdgpu_bo_create(adev, amdgpu_vm_bo_size(adev, 0), align, true,
|
|
AMDGPU_GEM_DOMAIN_VRAM,
|
|
flags,
|
|
NULL, NULL, init_pde_value, &vm->root.base.bo);
|
|
if (r)
|
|
goto error_free_sched_entity;
|
|
|
|
vm->root.base.vm = vm;
|
|
list_add_tail(&vm->root.base.bo_list, &vm->root.base.bo->va);
|
|
INIT_LIST_HEAD(&vm->root.base.vm_status);
|
|
|
|
if (vm->use_cpu_for_update) {
|
|
r = amdgpu_bo_reserve(vm->root.base.bo, false);
|
|
if (r)
|
|
goto error_free_root;
|
|
|
|
r = amdgpu_bo_kmap(vm->root.base.bo, NULL);
|
|
amdgpu_bo_unreserve(vm->root.base.bo);
|
|
if (r)
|
|
goto error_free_root;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
INIT_KFIFO(vm->faults);
|
|
vm->fault_credit = 16;
|
|
|
|
return 0;
|
|
|
|
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:
|
|
amd_sched_entity_fini(&ring->sched, &vm->entity);
|
|
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_vm_free_levels - free PD/PT levels
|
|
*
|
|
* @level: PD/PT starting level to free
|
|
*
|
|
* Free the page directory or page table level and all sub levels.
|
|
*/
|
|
static void amdgpu_vm_free_levels(struct amdgpu_vm_pt *level)
|
|
{
|
|
unsigned i;
|
|
|
|
if (level->base.bo) {
|
|
list_del(&level->base.bo_list);
|
|
list_del(&level->base.vm_status);
|
|
amdgpu_bo_unref(&level->base.bo->shadow);
|
|
amdgpu_bo_unref(&level->base.bo);
|
|
}
|
|
|
|
if (level->entries)
|
|
for (i = 0; i <= level->last_entry_used; i++)
|
|
amdgpu_vm_free_levels(&level->entries[i]);
|
|
|
|
kvfree(level->entries);
|
|
}
|
|
|
|
/**
|
|
* 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->gart.gart_funcs->set_prt;
|
|
struct amdgpu_bo *root;
|
|
u64 fault;
|
|
int i, r;
|
|
|
|
/* Clear pending page faults from IH when the VM is destroyed */
|
|
while (kfifo_get(&vm->faults, &fault))
|
|
amdgpu_ih_clear_fault(adev, 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);
|
|
}
|
|
|
|
amd_sched_entity_fini(vm->entity.sched, &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_levels(&vm->root);
|
|
amdgpu_bo_unreserve(root);
|
|
}
|
|
amdgpu_bo_unref(&root);
|
|
dma_fence_put(vm->last_update);
|
|
for (i = 0; i < AMDGPU_MAX_VMHUBS; i++)
|
|
amdgpu_vm_free_reserved_vmid(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);
|
|
spin_unlock(&adev->vm_manager.pasid_lock);
|
|
if (!vm)
|
|
/* VM not found, can't track fault credit */
|
|
return true;
|
|
|
|
/* No lock needed. only accessed by IRQ handler */
|
|
if (!vm->fault_credit)
|
|
/* Too many faults in this VM */
|
|
return false;
|
|
|
|
vm->fault_credit--;
|
|
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, j;
|
|
|
|
for (i = 0; i < AMDGPU_MAX_VMHUBS; ++i) {
|
|
struct amdgpu_vm_id_manager *id_mgr =
|
|
&adev->vm_manager.id_mgr[i];
|
|
|
|
mutex_init(&id_mgr->lock);
|
|
INIT_LIST_HEAD(&id_mgr->ids_lru);
|
|
atomic_set(&id_mgr->reserved_vmid_num, 0);
|
|
|
|
/* skip over VMID 0, since it is the system VM */
|
|
for (j = 1; j < id_mgr->num_ids; ++j) {
|
|
amdgpu_vm_reset_id(adev, i, j);
|
|
amdgpu_sync_create(&id_mgr->ids[i].active);
|
|
list_add_tail(&id_mgr->ids[j].list, &id_mgr->ids_lru);
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
atomic_set(&adev->vm_manager.vm_pte_next_ring, 0);
|
|
atomic64_set(&adev->vm_manager.client_counter, 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_vm_is_large_bar(adev))
|
|
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)
|
|
{
|
|
unsigned i, j;
|
|
|
|
WARN_ON(!idr_is_empty(&adev->vm_manager.pasid_idr));
|
|
idr_destroy(&adev->vm_manager.pasid_idr);
|
|
|
|
for (i = 0; i < AMDGPU_MAX_VMHUBS; ++i) {
|
|
struct amdgpu_vm_id_manager *id_mgr =
|
|
&adev->vm_manager.id_mgr[i];
|
|
|
|
mutex_destroy(&id_mgr->lock);
|
|
for (j = 0; j < AMDGPU_NUM_VM; ++j) {
|
|
struct amdgpu_vm_id *id = &id_mgr->ids[j];
|
|
|
|
amdgpu_sync_free(&id->active);
|
|
dma_fence_put(id->flushed_updates);
|
|
dma_fence_put(id->last_flush);
|
|
}
|
|
}
|
|
}
|
|
|
|
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_vm_alloc_reserved_vmid(adev, &fpriv->vm,
|
|
AMDGPU_GFXHUB);
|
|
if (r)
|
|
return r;
|
|
break;
|
|
case AMDGPU_VM_OP_UNRESERVE_VMID:
|
|
amdgpu_vm_free_reserved_vmid(adev, &fpriv->vm, AMDGPU_GFXHUB);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|