| /* |
| * Copyright 2019 Advanced Micro Devices, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| */ |
| |
| #ifndef __AMDGPU_MES_H__ |
| #define __AMDGPU_MES_H__ |
| |
| #include "amdgpu_irq.h" |
| #include "kgd_kfd_interface.h" |
| #include "amdgpu_gfx.h" |
| #include <linux/sched/mm.h> |
| |
| #define AMDGPU_MES_MAX_COMPUTE_PIPES 8 |
| #define AMDGPU_MES_MAX_GFX_PIPES 2 |
| #define AMDGPU_MES_MAX_SDMA_PIPES 2 |
| |
| #define AMDGPU_MES_API_VERSION_SHIFT 12 |
| #define AMDGPU_MES_FEAT_VERSION_SHIFT 24 |
| |
| #define AMDGPU_MES_VERSION_MASK 0x00000fff |
| #define AMDGPU_MES_API_VERSION_MASK 0x00fff000 |
| #define AMDGPU_MES_FEAT_VERSION_MASK 0xff000000 |
| |
| enum amdgpu_mes_priority_level { |
| AMDGPU_MES_PRIORITY_LEVEL_LOW = 0, |
| AMDGPU_MES_PRIORITY_LEVEL_NORMAL = 1, |
| AMDGPU_MES_PRIORITY_LEVEL_MEDIUM = 2, |
| AMDGPU_MES_PRIORITY_LEVEL_HIGH = 3, |
| AMDGPU_MES_PRIORITY_LEVEL_REALTIME = 4, |
| AMDGPU_MES_PRIORITY_NUM_LEVELS |
| }; |
| |
| #define AMDGPU_MES_PROC_CTX_SIZE 0x1000 /* one page area */ |
| #define AMDGPU_MES_GANG_CTX_SIZE 0x1000 /* one page area */ |
| |
| struct amdgpu_mes_funcs; |
| |
| enum admgpu_mes_pipe { |
| AMDGPU_MES_SCHED_PIPE = 0, |
| AMDGPU_MES_KIQ_PIPE, |
| AMDGPU_MAX_MES_PIPES = 2, |
| }; |
| |
| struct amdgpu_mes { |
| struct amdgpu_device *adev; |
| |
| struct mutex mutex_hidden; |
| |
| struct idr pasid_idr; |
| struct idr gang_id_idr; |
| struct idr queue_id_idr; |
| struct ida doorbell_ida; |
| |
| spinlock_t queue_id_lock; |
| |
| uint32_t sched_version; |
| uint32_t kiq_version; |
| |
| uint32_t total_max_queue; |
| uint32_t doorbell_id_offset; |
| uint32_t max_doorbell_slices; |
| |
| uint64_t default_process_quantum; |
| uint64_t default_gang_quantum; |
| |
| struct amdgpu_ring ring; |
| spinlock_t ring_lock; |
| |
| const struct firmware *fw[AMDGPU_MAX_MES_PIPES]; |
| |
| /* mes ucode */ |
| struct amdgpu_bo *ucode_fw_obj[AMDGPU_MAX_MES_PIPES]; |
| uint64_t ucode_fw_gpu_addr[AMDGPU_MAX_MES_PIPES]; |
| uint32_t *ucode_fw_ptr[AMDGPU_MAX_MES_PIPES]; |
| uint64_t uc_start_addr[AMDGPU_MAX_MES_PIPES]; |
| |
| /* mes ucode data */ |
| struct amdgpu_bo *data_fw_obj[AMDGPU_MAX_MES_PIPES]; |
| uint64_t data_fw_gpu_addr[AMDGPU_MAX_MES_PIPES]; |
| uint32_t *data_fw_ptr[AMDGPU_MAX_MES_PIPES]; |
| uint64_t data_start_addr[AMDGPU_MAX_MES_PIPES]; |
| |
| /* eop gpu obj */ |
| struct amdgpu_bo *eop_gpu_obj[AMDGPU_MAX_MES_PIPES]; |
| uint64_t eop_gpu_addr[AMDGPU_MAX_MES_PIPES]; |
| |
| void *mqd_backup[AMDGPU_MAX_MES_PIPES]; |
| struct amdgpu_irq_src irq[AMDGPU_MAX_MES_PIPES]; |
| |
| uint32_t vmid_mask_gfxhub; |
| uint32_t vmid_mask_mmhub; |
| uint32_t compute_hqd_mask[AMDGPU_MES_MAX_COMPUTE_PIPES]; |
| uint32_t gfx_hqd_mask[AMDGPU_MES_MAX_GFX_PIPES]; |
| uint32_t sdma_hqd_mask[AMDGPU_MES_MAX_SDMA_PIPES]; |
| uint32_t aggregated_doorbells[AMDGPU_MES_PRIORITY_NUM_LEVELS]; |
| uint32_t sch_ctx_offs; |
| uint64_t sch_ctx_gpu_addr; |
| uint64_t *sch_ctx_ptr; |
| uint32_t query_status_fence_offs; |
| uint64_t query_status_fence_gpu_addr; |
| uint64_t *query_status_fence_ptr; |
| uint32_t read_val_offs; |
| uint64_t read_val_gpu_addr; |
| uint32_t *read_val_ptr; |
| |
| uint32_t saved_flags; |
| |
| /* initialize kiq pipe */ |
| int (*kiq_hw_init)(struct amdgpu_device *adev); |
| int (*kiq_hw_fini)(struct amdgpu_device *adev); |
| |
| /* ip specific functions */ |
| const struct amdgpu_mes_funcs *funcs; |
| }; |
| |
| struct amdgpu_mes_process { |
| int pasid; |
| struct amdgpu_vm *vm; |
| uint64_t pd_gpu_addr; |
| struct amdgpu_bo *proc_ctx_bo; |
| uint64_t proc_ctx_gpu_addr; |
| void *proc_ctx_cpu_ptr; |
| uint64_t process_quantum; |
| struct list_head gang_list; |
| uint32_t doorbell_index; |
| unsigned long *doorbell_bitmap; |
| struct mutex doorbell_lock; |
| }; |
| |
| struct amdgpu_mes_gang { |
| int gang_id; |
| int priority; |
| int inprocess_gang_priority; |
| int global_priority_level; |
| struct list_head list; |
| struct amdgpu_mes_process *process; |
| struct amdgpu_bo *gang_ctx_bo; |
| uint64_t gang_ctx_gpu_addr; |
| void *gang_ctx_cpu_ptr; |
| uint64_t gang_quantum; |
| struct list_head queue_list; |
| }; |
| |
| struct amdgpu_mes_queue { |
| struct list_head list; |
| struct amdgpu_mes_gang *gang; |
| int queue_id; |
| uint64_t doorbell_off; |
| struct amdgpu_bo *mqd_obj; |
| void *mqd_cpu_ptr; |
| uint64_t mqd_gpu_addr; |
| uint64_t wptr_gpu_addr; |
| int queue_type; |
| int paging; |
| struct amdgpu_ring *ring; |
| }; |
| |
| struct amdgpu_mes_queue_properties { |
| int queue_type; |
| uint64_t hqd_base_gpu_addr; |
| uint64_t rptr_gpu_addr; |
| uint64_t wptr_gpu_addr; |
| uint64_t wptr_mc_addr; |
| uint32_t queue_size; |
| uint64_t eop_gpu_addr; |
| uint32_t hqd_pipe_priority; |
| uint32_t hqd_queue_priority; |
| bool paging; |
| struct amdgpu_ring *ring; |
| /* out */ |
| uint64_t doorbell_off; |
| }; |
| |
| struct amdgpu_mes_gang_properties { |
| uint32_t priority; |
| uint32_t gang_quantum; |
| uint32_t inprocess_gang_priority; |
| uint32_t priority_level; |
| int global_priority_level; |
| }; |
| |
| struct mes_add_queue_input { |
| uint32_t process_id; |
| uint64_t page_table_base_addr; |
| uint64_t process_va_start; |
| uint64_t process_va_end; |
| uint64_t process_quantum; |
| uint64_t process_context_addr; |
| uint64_t gang_quantum; |
| uint64_t gang_context_addr; |
| uint32_t inprocess_gang_priority; |
| uint32_t gang_global_priority_level; |
| uint32_t doorbell_offset; |
| uint64_t mqd_addr; |
| uint64_t wptr_addr; |
| uint64_t wptr_mc_addr; |
| uint32_t queue_type; |
| uint32_t paging; |
| uint32_t gws_base; |
| uint32_t gws_size; |
| uint64_t tba_addr; |
| uint64_t tma_addr; |
| uint32_t is_kfd_process; |
| uint32_t is_aql_queue; |
| uint32_t queue_size; |
| }; |
| |
| struct mes_remove_queue_input { |
| uint32_t doorbell_offset; |
| uint64_t gang_context_addr; |
| }; |
| |
| struct mes_unmap_legacy_queue_input { |
| enum amdgpu_unmap_queues_action action; |
| uint32_t queue_type; |
| uint32_t doorbell_offset; |
| uint32_t pipe_id; |
| uint32_t queue_id; |
| uint64_t trail_fence_addr; |
| uint64_t trail_fence_data; |
| }; |
| |
| struct mes_suspend_gang_input { |
| bool suspend_all_gangs; |
| uint64_t gang_context_addr; |
| uint64_t suspend_fence_addr; |
| uint32_t suspend_fence_value; |
| }; |
| |
| struct mes_resume_gang_input { |
| bool resume_all_gangs; |
| uint64_t gang_context_addr; |
| }; |
| |
| enum mes_misc_opcode { |
| MES_MISC_OP_WRITE_REG, |
| MES_MISC_OP_READ_REG, |
| MES_MISC_OP_WRM_REG_WAIT, |
| MES_MISC_OP_WRM_REG_WR_WAIT, |
| }; |
| |
| struct mes_misc_op_input { |
| enum mes_misc_opcode op; |
| |
| union { |
| struct { |
| uint32_t reg_offset; |
| uint64_t buffer_addr; |
| } read_reg; |
| |
| struct { |
| uint32_t reg_offset; |
| uint32_t reg_value; |
| } write_reg; |
| |
| struct { |
| uint32_t ref; |
| uint32_t mask; |
| uint32_t reg0; |
| uint32_t reg1; |
| } wrm_reg; |
| }; |
| }; |
| |
| struct amdgpu_mes_funcs { |
| int (*add_hw_queue)(struct amdgpu_mes *mes, |
| struct mes_add_queue_input *input); |
| |
| int (*remove_hw_queue)(struct amdgpu_mes *mes, |
| struct mes_remove_queue_input *input); |
| |
| int (*unmap_legacy_queue)(struct amdgpu_mes *mes, |
| struct mes_unmap_legacy_queue_input *input); |
| |
| int (*suspend_gang)(struct amdgpu_mes *mes, |
| struct mes_suspend_gang_input *input); |
| |
| int (*resume_gang)(struct amdgpu_mes *mes, |
| struct mes_resume_gang_input *input); |
| |
| int (*misc_op)(struct amdgpu_mes *mes, |
| struct mes_misc_op_input *input); |
| }; |
| |
| #define amdgpu_mes_kiq_hw_init(adev) (adev)->mes.kiq_hw_init((adev)) |
| #define amdgpu_mes_kiq_hw_fini(adev) (adev)->mes.kiq_hw_fini((adev)) |
| |
| int amdgpu_mes_ctx_get_offs(struct amdgpu_ring *ring, unsigned int id_offs); |
| |
| int amdgpu_mes_init_microcode(struct amdgpu_device *adev, int pipe); |
| int amdgpu_mes_init(struct amdgpu_device *adev); |
| void amdgpu_mes_fini(struct amdgpu_device *adev); |
| |
| int amdgpu_mes_create_process(struct amdgpu_device *adev, int pasid, |
| struct amdgpu_vm *vm); |
| void amdgpu_mes_destroy_process(struct amdgpu_device *adev, int pasid); |
| |
| int amdgpu_mes_add_gang(struct amdgpu_device *adev, int pasid, |
| struct amdgpu_mes_gang_properties *gprops, |
| int *gang_id); |
| int amdgpu_mes_remove_gang(struct amdgpu_device *adev, int gang_id); |
| |
| int amdgpu_mes_suspend(struct amdgpu_device *adev); |
| int amdgpu_mes_resume(struct amdgpu_device *adev); |
| |
| int amdgpu_mes_add_hw_queue(struct amdgpu_device *adev, int gang_id, |
| struct amdgpu_mes_queue_properties *qprops, |
| int *queue_id); |
| int amdgpu_mes_remove_hw_queue(struct amdgpu_device *adev, int queue_id); |
| |
| int amdgpu_mes_unmap_legacy_queue(struct amdgpu_device *adev, |
| struct amdgpu_ring *ring, |
| enum amdgpu_unmap_queues_action action, |
| u64 gpu_addr, u64 seq); |
| |
| uint32_t amdgpu_mes_rreg(struct amdgpu_device *adev, uint32_t reg); |
| int amdgpu_mes_wreg(struct amdgpu_device *adev, |
| uint32_t reg, uint32_t val); |
| int amdgpu_mes_reg_wait(struct amdgpu_device *adev, uint32_t reg, |
| uint32_t val, uint32_t mask); |
| int amdgpu_mes_reg_write_reg_wait(struct amdgpu_device *adev, |
| uint32_t reg0, uint32_t reg1, |
| uint32_t ref, uint32_t mask); |
| |
| int amdgpu_mes_add_ring(struct amdgpu_device *adev, int gang_id, |
| int queue_type, int idx, |
| struct amdgpu_mes_ctx_data *ctx_data, |
| struct amdgpu_ring **out); |
| void amdgpu_mes_remove_ring(struct amdgpu_device *adev, |
| struct amdgpu_ring *ring); |
| |
| uint32_t amdgpu_mes_get_aggregated_doorbell_index(struct amdgpu_device *adev, |
| enum amdgpu_mes_priority_level prio); |
| |
| int amdgpu_mes_ctx_alloc_meta_data(struct amdgpu_device *adev, |
| struct amdgpu_mes_ctx_data *ctx_data); |
| void amdgpu_mes_ctx_free_meta_data(struct amdgpu_mes_ctx_data *ctx_data); |
| int amdgpu_mes_ctx_map_meta_data(struct amdgpu_device *adev, |
| struct amdgpu_vm *vm, |
| struct amdgpu_mes_ctx_data *ctx_data); |
| int amdgpu_mes_ctx_unmap_meta_data(struct amdgpu_device *adev, |
| struct amdgpu_mes_ctx_data *ctx_data); |
| |
| int amdgpu_mes_self_test(struct amdgpu_device *adev); |
| |
| int amdgpu_mes_alloc_process_doorbells(struct amdgpu_device *adev, |
| unsigned int *doorbell_index); |
| void amdgpu_mes_free_process_doorbells(struct amdgpu_device *adev, |
| unsigned int doorbell_index); |
| unsigned int amdgpu_mes_get_doorbell_dw_offset_in_bar( |
| struct amdgpu_device *adev, |
| uint32_t doorbell_index, |
| unsigned int doorbell_id); |
| int amdgpu_mes_doorbell_process_slice(struct amdgpu_device *adev); |
| |
| /* |
| * MES lock can be taken in MMU notifiers. |
| * |
| * A bit more detail about why to set no-FS reclaim with MES lock: |
| * |
| * The purpose of the MMU notifier is to stop GPU access to memory so |
| * that the Linux VM subsystem can move pages around safely. This is |
| * done by preempting user mode queues for the affected process. When |
| * MES is used, MES lock needs to be taken to preempt the queues. |
| * |
| * The MMU notifier callback entry point in the driver is |
| * amdgpu_mn_invalidate_range_start_hsa. The relevant call chain from |
| * there is: |
| * amdgpu_amdkfd_evict_userptr -> kgd2kfd_quiesce_mm -> |
| * kfd_process_evict_queues -> pdd->dev->dqm->ops.evict_process_queues |
| * |
| * The last part of the chain is a function pointer where we take the |
| * MES lock. |
| * |
| * The problem with taking locks in the MMU notifier is, that MMU |
| * notifiers can be called in reclaim-FS context. That's where the |
| * kernel frees up pages to make room for new page allocations under |
| * memory pressure. While we are running in reclaim-FS context, we must |
| * not trigger another memory reclaim operation because that would |
| * recursively reenter the reclaim code and cause a deadlock. The |
| * memalloc_nofs_save/restore calls guarantee that. |
| * |
| * In addition we also need to avoid lock dependencies on other locks taken |
| * under the MES lock, for example reservation locks. Here is a possible |
| * scenario of a deadlock: |
| * Thread A: takes and holds reservation lock | triggers reclaim-FS | |
| * MMU notifier | blocks trying to take MES lock |
| * Thread B: takes and holds MES lock | blocks trying to take reservation lock |
| * |
| * In this scenario Thread B gets involved in a deadlock even without |
| * triggering a reclaim-FS operation itself. |
| * To fix this and break the lock dependency chain you'd need to either: |
| * 1. protect reservation locks with memalloc_nofs_save/restore, or |
| * 2. avoid taking reservation locks under the MES lock. |
| * |
| * Reservation locks are taken all over the kernel in different subsystems, we |
| * have no control over them and their lock dependencies.So the only workable |
| * solution is to avoid taking other locks under the MES lock. |
| * As a result, make sure no reclaim-FS happens while holding this lock anywhere |
| * to prevent deadlocks when an MMU notifier runs in reclaim-FS context. |
| */ |
| static inline void amdgpu_mes_lock(struct amdgpu_mes *mes) |
| { |
| mutex_lock(&mes->mutex_hidden); |
| mes->saved_flags = memalloc_noreclaim_save(); |
| } |
| |
| static inline void amdgpu_mes_unlock(struct amdgpu_mes *mes) |
| { |
| memalloc_noreclaim_restore(mes->saved_flags); |
| mutex_unlock(&mes->mutex_hidden); |
| } |
| #endif /* __AMDGPU_MES_H__ */ |
