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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c98171ccf6
When many wavefronts cause VM faults at the same time, it can overwhelm the interrupt handler and cause IH ring overflows before the driver can notify or kill the faulting application. As a workaround I'm introducing limited per-VM fault credit. After that number of VM faults have occurred, further VM faults are filtered out at the prescreen stage of processing. This depends on the PASID in the interrupt packet, so it currently only works for KFD contexts. Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
314 lines
9.7 KiB
C
314 lines
9.7 KiB
C
/*
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* Copyright 2016 Advanced Micro Devices, Inc.
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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: Christian König
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*/
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#ifndef __AMDGPU_VM_H__
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#define __AMDGPU_VM_H__
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#include <linux/rbtree.h>
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#include <linux/idr.h>
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#include "gpu_scheduler.h"
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#include "amdgpu_sync.h"
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#include "amdgpu_ring.h"
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struct amdgpu_bo_va;
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struct amdgpu_job;
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struct amdgpu_bo_list_entry;
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/*
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* GPUVM handling
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*/
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/* maximum number of VMIDs */
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#define AMDGPU_NUM_VM 16
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/* Maximum number of PTEs the hardware can write with one command */
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#define AMDGPU_VM_MAX_UPDATE_SIZE 0x3FFFF
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/* number of entries in page table */
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#define AMDGPU_VM_PTE_COUNT(adev) (1 << (adev)->vm_manager.block_size)
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/* PTBs (Page Table Blocks) need to be aligned to 32K */
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#define AMDGPU_VM_PTB_ALIGN_SIZE 32768
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#define AMDGPU_PTE_VALID (1ULL << 0)
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#define AMDGPU_PTE_SYSTEM (1ULL << 1)
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#define AMDGPU_PTE_SNOOPED (1ULL << 2)
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/* VI only */
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#define AMDGPU_PTE_EXECUTABLE (1ULL << 4)
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#define AMDGPU_PTE_READABLE (1ULL << 5)
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#define AMDGPU_PTE_WRITEABLE (1ULL << 6)
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#define AMDGPU_PTE_FRAG(x) ((x & 0x1fULL) << 7)
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/* TILED for VEGA10, reserved for older ASICs */
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#define AMDGPU_PTE_PRT (1ULL << 51)
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/* PDE is handled as PTE for VEGA10 */
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#define AMDGPU_PDE_PTE (1ULL << 54)
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/* VEGA10 only */
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#define AMDGPU_PTE_MTYPE(a) ((uint64_t)a << 57)
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#define AMDGPU_PTE_MTYPE_MASK AMDGPU_PTE_MTYPE(3ULL)
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/* How to programm VM fault handling */
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#define AMDGPU_VM_FAULT_STOP_NEVER 0
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#define AMDGPU_VM_FAULT_STOP_FIRST 1
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#define AMDGPU_VM_FAULT_STOP_ALWAYS 2
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/* max number of VMHUB */
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#define AMDGPU_MAX_VMHUBS 2
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#define AMDGPU_GFXHUB 0
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#define AMDGPU_MMHUB 1
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/* hardcode that limit for now */
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#define AMDGPU_VA_RESERVED_SIZE (8 << 20)
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/* max vmids dedicated for process */
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#define AMDGPU_VM_MAX_RESERVED_VMID 1
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#define AMDGPU_VM_CONTEXT_GFX 0
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#define AMDGPU_VM_CONTEXT_COMPUTE 1
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/* See vm_update_mode */
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#define AMDGPU_VM_USE_CPU_FOR_GFX (1 << 0)
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#define AMDGPU_VM_USE_CPU_FOR_COMPUTE (1 << 1)
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/* base structure for tracking BO usage in a VM */
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struct amdgpu_vm_bo_base {
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/* constant after initialization */
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struct amdgpu_vm *vm;
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struct amdgpu_bo *bo;
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/* protected by bo being reserved */
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struct list_head bo_list;
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/* protected by spinlock */
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struct list_head vm_status;
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/* protected by the BO being reserved */
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bool moved;
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};
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struct amdgpu_vm_pt {
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struct amdgpu_vm_bo_base base;
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uint64_t addr;
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/* array of page tables, one for each directory entry */
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struct amdgpu_vm_pt *entries;
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unsigned last_entry_used;
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};
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#define AMDGPU_VM_FAULT(pasid, addr) (((u64)(pasid) << 48) | (addr))
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#define AMDGPU_VM_FAULT_PASID(fault) ((u64)(fault) >> 48)
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#define AMDGPU_VM_FAULT_ADDR(fault) ((u64)(fault) & 0xfffffffff000ULL)
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struct amdgpu_vm {
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/* tree of virtual addresses mapped */
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struct rb_root va;
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/* protecting invalidated */
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spinlock_t status_lock;
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/* BOs who needs a validation */
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struct list_head evicted;
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/* PT BOs which relocated and their parent need an update */
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struct list_head relocated;
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/* BOs moved, but not yet updated in the PT */
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struct list_head moved;
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/* BO mappings freed, but not yet updated in the PT */
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struct list_head freed;
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/* contains the page directory */
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struct amdgpu_vm_pt root;
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struct dma_fence *last_update;
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/* protecting freed */
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spinlock_t freed_lock;
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/* Scheduler entity for page table updates */
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struct amd_sched_entity entity;
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/* client id and PASID (TODO: replace client_id with PASID) */
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u64 client_id;
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unsigned int pasid;
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/* dedicated to vm */
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struct amdgpu_vm_id *reserved_vmid[AMDGPU_MAX_VMHUBS];
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/* Flag to indicate if VM tables are updated by CPU or GPU (SDMA) */
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bool use_cpu_for_update;
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/* Flag to indicate ATS support from PTE for GFX9 */
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bool pte_support_ats;
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/* Up to 128 pending retry page faults */
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DECLARE_KFIFO(faults, u64, 128);
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/* Limit non-retry fault storms */
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unsigned int fault_credit;
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};
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struct amdgpu_vm_id {
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struct list_head list;
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struct amdgpu_sync active;
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struct dma_fence *last_flush;
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atomic64_t owner;
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uint64_t pd_gpu_addr;
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/* last flushed PD/PT update */
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struct dma_fence *flushed_updates;
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uint32_t current_gpu_reset_count;
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uint32_t gds_base;
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uint32_t gds_size;
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uint32_t gws_base;
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uint32_t gws_size;
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uint32_t oa_base;
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uint32_t oa_size;
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};
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struct amdgpu_vm_id_manager {
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struct mutex lock;
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unsigned num_ids;
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struct list_head ids_lru;
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struct amdgpu_vm_id ids[AMDGPU_NUM_VM];
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atomic_t reserved_vmid_num;
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};
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struct amdgpu_vm_manager {
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/* Handling of VMIDs */
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struct amdgpu_vm_id_manager id_mgr[AMDGPU_MAX_VMHUBS];
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/* Handling of VM fences */
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u64 fence_context;
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unsigned seqno[AMDGPU_MAX_RINGS];
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uint64_t max_pfn;
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uint32_t num_level;
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uint64_t vm_size;
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uint32_t block_size;
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uint32_t fragment_size;
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/* vram base address for page table entry */
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u64 vram_base_offset;
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/* vm pte handling */
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const struct amdgpu_vm_pte_funcs *vm_pte_funcs;
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struct amdgpu_ring *vm_pte_rings[AMDGPU_MAX_RINGS];
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unsigned vm_pte_num_rings;
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atomic_t vm_pte_next_ring;
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/* client id counter */
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atomic64_t client_counter;
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/* partial resident texture handling */
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spinlock_t prt_lock;
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atomic_t num_prt_users;
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/* controls how VM page tables are updated for Graphics and Compute.
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* BIT0[= 0] Graphics updated by SDMA [= 1] by CPU
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* BIT1[= 0] Compute updated by SDMA [= 1] by CPU
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*/
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int vm_update_mode;
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/* PASID to VM mapping, will be used in interrupt context to
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* look up VM of a page fault
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*/
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struct idr pasid_idr;
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spinlock_t pasid_lock;
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};
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int amdgpu_vm_alloc_pasid(unsigned int bits);
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void amdgpu_vm_free_pasid(unsigned int pasid);
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void amdgpu_vm_manager_init(struct amdgpu_device *adev);
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void amdgpu_vm_manager_fini(struct amdgpu_device *adev);
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int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
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int vm_context, unsigned int pasid);
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void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
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bool amdgpu_vm_pasid_fault_credit(struct amdgpu_device *adev,
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unsigned int pasid);
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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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bool amdgpu_vm_ready(struct amdgpu_vm *vm);
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int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
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int (*callback)(void *p, struct amdgpu_bo *bo),
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void *param);
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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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int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
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struct amdgpu_sync *sync, struct dma_fence *fence,
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struct amdgpu_job *job);
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int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync);
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void amdgpu_vm_reset_id(struct amdgpu_device *adev, unsigned vmhub,
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unsigned vmid);
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void amdgpu_vm_reset_all_ids(struct amdgpu_device *adev);
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int amdgpu_vm_update_directories(struct amdgpu_device *adev,
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struct amdgpu_vm *vm);
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int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
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struct amdgpu_vm *vm,
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struct dma_fence **fence);
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int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
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struct amdgpu_vm *vm);
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int amdgpu_vm_bo_update(struct amdgpu_device *adev,
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struct amdgpu_bo_va *bo_va,
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bool clear);
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void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
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struct amdgpu_bo *bo, bool evicted);
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struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
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struct amdgpu_bo *bo);
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struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
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struct amdgpu_vm *vm,
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struct amdgpu_bo *bo);
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int amdgpu_vm_bo_map(struct amdgpu_device *adev,
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struct amdgpu_bo_va *bo_va,
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uint64_t addr, uint64_t offset,
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uint64_t size, uint64_t flags);
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int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
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struct amdgpu_bo_va *bo_va,
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uint64_t addr, uint64_t offset,
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uint64_t size, uint64_t flags);
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int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
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struct amdgpu_bo_va *bo_va,
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uint64_t addr);
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int amdgpu_vm_bo_clear_mappings(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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struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
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uint64_t addr);
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void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
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struct amdgpu_bo_va *bo_va);
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void amdgpu_vm_set_fragment_size(struct amdgpu_device *adev,
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uint32_t fragment_size_default);
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void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint64_t vm_size,
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uint32_t fragment_size_default);
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int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
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bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
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struct amdgpu_job *job);
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void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev);
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#endif
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