diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_process.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_process.c | 1767 |
1 files changed, 1367 insertions, 400 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index d27221ddcdeb..a085faac9fe1 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -1,5 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT /* - * Copyright 2014 Advanced Micro Devices, Inc. + * Copyright 2014-2022 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -25,8 +26,8 @@ #include <linux/sched.h> #include <linux/sched/mm.h> #include <linux/sched/task.h> +#include <linux/mmu_context.h> #include <linux/slab.h> -#include <linux/amd-iommu.h> #include <linux/notifier.h> #include <linux/compat.h> #include <linux/mman.h> @@ -34,20 +35,22 @@ #include <linux/pm_runtime.h> #include "amdgpu_amdkfd.h" #include "amdgpu.h" +#include "amdgpu_reset.h" struct mm_struct; #include "kfd_priv.h" #include "kfd_device_queue_manager.h" -#include "kfd_dbgmgr.h" -#include "kfd_iommu.h" +#include "kfd_svm.h" +#include "kfd_smi_events.h" +#include "kfd_debug.h" /* * List of struct kfd_process (field kfd_process). * Unique/indexed by mm_struct* */ DEFINE_HASHTABLE(kfd_processes_table, KFD_PROCESS_TABLE_SIZE); -static DEFINE_MUTEX(kfd_processes_mutex); +DEFINE_MUTEX(kfd_processes_mutex); DEFINE_SRCU(kfd_processes_srcu); @@ -62,33 +65,294 @@ static struct workqueue_struct *kfd_process_wq; */ static struct workqueue_struct *kfd_restore_wq; -static struct kfd_process *find_process(const struct task_struct *thread); +static struct kfd_process *find_process(const struct task_struct *thread, + bool ref); static void kfd_process_ref_release(struct kref *ref); static struct kfd_process *create_process(const struct task_struct *thread); -static int kfd_process_init_cwsr_apu(struct kfd_process *p, struct file *filep); static void evict_process_worker(struct work_struct *work); static void restore_process_worker(struct work_struct *work); +static void kfd_process_device_destroy_cwsr_dgpu(struct kfd_process_device *pdd); + struct kfd_procfs_tree { struct kobject *kobj; }; static struct kfd_procfs_tree procfs; +/* + * Structure for SDMA activity tracking + */ +struct kfd_sdma_activity_handler_workarea { + struct work_struct sdma_activity_work; + struct kfd_process_device *pdd; + uint64_t sdma_activity_counter; +}; + +struct temp_sdma_queue_list { + uint64_t __user *rptr; + uint64_t sdma_val; + unsigned int queue_id; + struct list_head list; +}; + +static void kfd_sdma_activity_worker(struct work_struct *work) +{ + struct kfd_sdma_activity_handler_workarea *workarea; + struct kfd_process_device *pdd; + uint64_t val; + struct mm_struct *mm; + struct queue *q; + struct qcm_process_device *qpd; + struct device_queue_manager *dqm; + int ret = 0; + struct temp_sdma_queue_list sdma_q_list; + struct temp_sdma_queue_list *sdma_q, *next; + + workarea = container_of(work, struct kfd_sdma_activity_handler_workarea, + sdma_activity_work); + + pdd = workarea->pdd; + if (!pdd) + return; + dqm = pdd->dev->dqm; + qpd = &pdd->qpd; + if (!dqm || !qpd) + return; + /* + * Total SDMA activity is current SDMA activity + past SDMA activity + * Past SDMA count is stored in pdd. + * To get the current activity counters for all active SDMA queues, + * we loop over all SDMA queues and get their counts from user-space. + * + * We cannot call get_user() with dqm_lock held as it can cause + * a circular lock dependency situation. To read the SDMA stats, + * we need to do the following: + * + * 1. Create a temporary list of SDMA queue nodes from the qpd->queues_list, + * with dqm_lock/dqm_unlock(). + * 2. Call get_user() for each node in temporary list without dqm_lock. + * Save the SDMA count for each node and also add the count to the total + * SDMA count counter. + * Its possible, during this step, a few SDMA queue nodes got deleted + * from the qpd->queues_list. + * 3. Do a second pass over qpd->queues_list to check if any nodes got deleted. + * If any node got deleted, its SDMA count would be captured in the sdma + * past activity counter. So subtract the SDMA counter stored in step 2 + * for this node from the total SDMA count. + */ + INIT_LIST_HEAD(&sdma_q_list.list); + + /* + * Create the temp list of all SDMA queues + */ + dqm_lock(dqm); + + list_for_each_entry(q, &qpd->queues_list, list) { + if ((q->properties.type != KFD_QUEUE_TYPE_SDMA) && + (q->properties.type != KFD_QUEUE_TYPE_SDMA_XGMI)) + continue; + + sdma_q = kzalloc(sizeof(struct temp_sdma_queue_list), GFP_KERNEL); + if (!sdma_q) { + dqm_unlock(dqm); + goto cleanup; + } + + INIT_LIST_HEAD(&sdma_q->list); + sdma_q->rptr = (uint64_t __user *)q->properties.read_ptr; + sdma_q->queue_id = q->properties.queue_id; + list_add_tail(&sdma_q->list, &sdma_q_list.list); + } + + /* + * If the temp list is empty, then no SDMA queues nodes were found in + * qpd->queues_list. Return the past activity count as the total sdma + * count + */ + if (list_empty(&sdma_q_list.list)) { + workarea->sdma_activity_counter = pdd->sdma_past_activity_counter; + dqm_unlock(dqm); + return; + } + + dqm_unlock(dqm); + + /* + * Get the usage count for each SDMA queue in temp_list. + */ + mm = get_task_mm(pdd->process->lead_thread); + if (!mm) + goto cleanup; + + kthread_use_mm(mm); + + list_for_each_entry(sdma_q, &sdma_q_list.list, list) { + val = 0; + ret = read_sdma_queue_counter(sdma_q->rptr, &val); + if (ret) { + pr_debug("Failed to read SDMA queue active counter for queue id: %d", + sdma_q->queue_id); + } else { + sdma_q->sdma_val = val; + workarea->sdma_activity_counter += val; + } + } + + kthread_unuse_mm(mm); + mmput(mm); + + /* + * Do a second iteration over qpd_queues_list to check if any SDMA + * nodes got deleted while fetching SDMA counter. + */ + dqm_lock(dqm); + + workarea->sdma_activity_counter += pdd->sdma_past_activity_counter; + + list_for_each_entry(q, &qpd->queues_list, list) { + if (list_empty(&sdma_q_list.list)) + break; + + if ((q->properties.type != KFD_QUEUE_TYPE_SDMA) && + (q->properties.type != KFD_QUEUE_TYPE_SDMA_XGMI)) + continue; + + list_for_each_entry_safe(sdma_q, next, &sdma_q_list.list, list) { + if (((uint64_t __user *)q->properties.read_ptr == sdma_q->rptr) && + (sdma_q->queue_id == q->properties.queue_id)) { + list_del(&sdma_q->list); + kfree(sdma_q); + break; + } + } + } + + dqm_unlock(dqm); + + /* + * If temp list is not empty, it implies some queues got deleted + * from qpd->queues_list during SDMA usage read. Subtract the SDMA + * count for each node from the total SDMA count. + */ + list_for_each_entry_safe(sdma_q, next, &sdma_q_list.list, list) { + workarea->sdma_activity_counter -= sdma_q->sdma_val; + list_del(&sdma_q->list); + kfree(sdma_q); + } + + return; + +cleanup: + list_for_each_entry_safe(sdma_q, next, &sdma_q_list.list, list) { + list_del(&sdma_q->list); + kfree(sdma_q); + } +} + +/** + * kfd_get_cu_occupancy - Collect number of waves in-flight on this device + * by current process. Translates acquired wave count into number of compute units + * that are occupied. + * + * @attr: Handle of attribute that allows reporting of wave count. The attribute + * handle encapsulates GPU device it is associated with, thereby allowing collection + * of waves in flight, etc + * @buffer: Handle of user provided buffer updated with wave count + * + * Return: Number of bytes written to user buffer or an error value + */ +static int kfd_get_cu_occupancy(struct attribute *attr, char *buffer) +{ + int cu_cnt; + int wave_cnt; + int max_waves_per_cu; + struct kfd_node *dev = NULL; + struct kfd_process *proc = NULL; + struct kfd_process_device *pdd = NULL; + int i; + struct kfd_cu_occupancy *cu_occupancy; + u32 queue_format; + + pdd = container_of(attr, struct kfd_process_device, attr_cu_occupancy); + dev = pdd->dev; + if (dev->kfd2kgd->get_cu_occupancy == NULL) + return -EINVAL; + + cu_cnt = 0; + proc = pdd->process; + if (pdd->qpd.queue_count == 0) { + pr_debug("Gpu-Id: %d has no active queues for process pid %d\n", + dev->id, (int)proc->lead_thread->pid); + return snprintf(buffer, PAGE_SIZE, "%d\n", cu_cnt); + } + + /* Collect wave count from device if it supports */ + wave_cnt = 0; + max_waves_per_cu = 0; + + cu_occupancy = kcalloc(AMDGPU_MAX_QUEUES, sizeof(*cu_occupancy), GFP_KERNEL); + if (!cu_occupancy) + return -ENOMEM; + + /* + * For GFX 9.4.3, fetch the CU occupancy from the first XCC in the partition. + * For AQL queues, because of cooperative dispatch we multiply the wave count + * by number of XCCs in the partition to get the total wave counts across all + * XCCs in the partition. + * For PM4 queues, there is no cooperative dispatch so wave_cnt stay as it is. + */ + dev->kfd2kgd->get_cu_occupancy(dev->adev, cu_occupancy, + &max_waves_per_cu, ffs(dev->xcc_mask) - 1); + + for (i = 0; i < AMDGPU_MAX_QUEUES; i++) { + if (cu_occupancy[i].wave_cnt != 0 && + kfd_dqm_is_queue_in_process(dev->dqm, &pdd->qpd, + cu_occupancy[i].doorbell_off, + &queue_format)) { + if (unlikely(queue_format == KFD_QUEUE_FORMAT_PM4)) + wave_cnt += cu_occupancy[i].wave_cnt; + else + wave_cnt += (NUM_XCC(dev->xcc_mask) * + cu_occupancy[i].wave_cnt); + } + } + + /* Translate wave count to number of compute units */ + cu_cnt = (wave_cnt + (max_waves_per_cu - 1)) / max_waves_per_cu; + kfree(cu_occupancy); + return snprintf(buffer, PAGE_SIZE, "%d\n", cu_cnt); +} + static ssize_t kfd_procfs_show(struct kobject *kobj, struct attribute *attr, char *buffer) { - if (strcmp(attr->name, "pasid") == 0) { - struct kfd_process *p = container_of(attr, struct kfd_process, - attr_pasid); - - return snprintf(buffer, PAGE_SIZE, "%d\n", p->pasid); - } else if (strncmp(attr->name, "vram_", 5) == 0) { + if (strcmp(attr->name, "pasid") == 0) + return snprintf(buffer, PAGE_SIZE, "%d\n", 0); + else if (strncmp(attr->name, "vram_", 5) == 0) { struct kfd_process_device *pdd = container_of(attr, struct kfd_process_device, attr_vram); - if (pdd) - return snprintf(buffer, PAGE_SIZE, "%llu\n", READ_ONCE(pdd->vram_usage)); + return snprintf(buffer, PAGE_SIZE, "%llu\n", atomic64_read(&pdd->vram_usage)); + } else if (strncmp(attr->name, "sdma_", 5) == 0) { + struct kfd_process_device *pdd = container_of(attr, struct kfd_process_device, + attr_sdma); + struct kfd_sdma_activity_handler_workarea sdma_activity_work_handler; + + INIT_WORK_ONSTACK(&sdma_activity_work_handler.sdma_activity_work, + kfd_sdma_activity_worker); + + sdma_activity_work_handler.pdd = pdd; + sdma_activity_work_handler.sdma_activity_counter = 0; + + schedule_work(&sdma_activity_work_handler.sdma_activity_work); + + flush_work(&sdma_activity_work_handler.sdma_activity_work); + destroy_work_on_stack(&sdma_activity_work_handler.sdma_activity_work); + + return snprintf(buffer, PAGE_SIZE, "%llu\n", + (sdma_activity_work_handler.sdma_activity_counter)/ + SDMA_ACTIVITY_DIVISOR); } else { pr_err("Invalid attribute"); return -EINVAL; @@ -106,7 +370,7 @@ static const struct sysfs_ops kfd_procfs_ops = { .show = kfd_procfs_show, }; -static struct kobj_type procfs_type = { +static const struct kobj_type procfs_type = { .release = kfd_procfs_kobj_release, .sysfs_ops = &kfd_procfs_ops, }; @@ -155,6 +419,55 @@ static ssize_t kfd_procfs_queue_show(struct kobject *kobj, return 0; } +static ssize_t kfd_procfs_stats_show(struct kobject *kobj, + struct attribute *attr, char *buffer) +{ + if (strcmp(attr->name, "evicted_ms") == 0) { + struct kfd_process_device *pdd = container_of(attr, + struct kfd_process_device, + attr_evict); + uint64_t evict_jiffies; + + evict_jiffies = atomic64_read(&pdd->evict_duration_counter); + + return snprintf(buffer, + PAGE_SIZE, + "%llu\n", + jiffies64_to_msecs(evict_jiffies)); + + /* Sysfs handle that gets CU occupancy is per device */ + } else if (strcmp(attr->name, "cu_occupancy") == 0) { + return kfd_get_cu_occupancy(attr, buffer); + } else { + pr_err("Invalid attribute"); + } + + return 0; +} + +static ssize_t kfd_sysfs_counters_show(struct kobject *kobj, + struct attribute *attr, char *buf) +{ + struct kfd_process_device *pdd; + + if (!strcmp(attr->name, "faults")) { + pdd = container_of(attr, struct kfd_process_device, + attr_faults); + return sysfs_emit(buf, "%llu\n", READ_ONCE(pdd->faults)); + } + if (!strcmp(attr->name, "page_in")) { + pdd = container_of(attr, struct kfd_process_device, + attr_page_in); + return sysfs_emit(buf, "%llu\n", READ_ONCE(pdd->page_in)); + } + if (!strcmp(attr->name, "page_out")) { + pdd = container_of(attr, struct kfd_process_device, + attr_page_out); + return sysfs_emit(buf, "%llu\n", READ_ONCE(pdd->page_out)); + } + return 0; +} + static struct attribute attr_queue_size = { .name = "size", .mode = KFD_SYSFS_FILE_MODE @@ -176,14 +489,33 @@ static struct attribute *procfs_queue_attrs[] = { &attr_queue_gpuid, NULL }; +ATTRIBUTE_GROUPS(procfs_queue); static const struct sysfs_ops procfs_queue_ops = { .show = kfd_procfs_queue_show, }; -static struct kobj_type procfs_queue_type = { +static const struct kobj_type procfs_queue_type = { .sysfs_ops = &procfs_queue_ops, - .default_attrs = procfs_queue_attrs, + .default_groups = procfs_queue_groups, +}; + +static const struct sysfs_ops procfs_stats_ops = { + .show = kfd_procfs_stats_show, +}; + +static const struct kobj_type procfs_stats_type = { + .sysfs_ops = &procfs_stats_ops, + .release = kfd_procfs_kobj_release, +}; + +static const struct sysfs_ops sysfs_counters_ops = { + .show = kfd_sysfs_counters_show, +}; + +static const struct kobj_type sysfs_counters_type = { + .sysfs_ops = &sysfs_counters_ops, + .release = kfd_procfs_kobj_release, }; int kfd_procfs_add_queue(struct queue *q) @@ -210,33 +542,141 @@ int kfd_procfs_add_queue(struct queue *q) return 0; } -int kfd_procfs_add_vram_usage(struct kfd_process *p) +static void kfd_sysfs_create_file(struct kobject *kobj, struct attribute *attr, + char *name) { - int ret = 0; - struct kfd_process_device *pdd; + int ret; - if (!p) - return -EINVAL; + if (!kobj || !attr || !name) + return; - if (!p->kobj) - return -EFAULT; + attr->name = name; + attr->mode = KFD_SYSFS_FILE_MODE; + sysfs_attr_init(attr); - /* Create proc/<pid>/vram_<gpuid> file for each GPU */ - list_for_each_entry(pdd, &p->per_device_data, per_device_list) { - snprintf(pdd->vram_filename, MAX_VRAM_FILENAME_LEN, "vram_%u", - pdd->dev->id); - pdd->attr_vram.name = pdd->vram_filename; - pdd->attr_vram.mode = KFD_SYSFS_FILE_MODE; - sysfs_attr_init(&pdd->attr_vram); - ret = sysfs_create_file(p->kobj, &pdd->attr_vram); - if (ret) - pr_warn("Creating vram usage for gpu id %d failed", - (int)pdd->dev->id); + ret = sysfs_create_file(kobj, attr); + if (ret) + pr_warn("Create sysfs %s/%s failed %d", kobj->name, name, ret); +} + +static void kfd_procfs_add_sysfs_stats(struct kfd_process *p) +{ + int ret; + int i; + char stats_dir_filename[MAX_SYSFS_FILENAME_LEN]; + + if (!p || !p->kobj) + return; + + /* + * Create sysfs files for each GPU: + * - proc/<pid>/stats_<gpuid>/ + * - proc/<pid>/stats_<gpuid>/evicted_ms + * - proc/<pid>/stats_<gpuid>/cu_occupancy + */ + for (i = 0; i < p->n_pdds; i++) { + struct kfd_process_device *pdd = p->pdds[i]; + + snprintf(stats_dir_filename, MAX_SYSFS_FILENAME_LEN, + "stats_%u", pdd->dev->id); + pdd->kobj_stats = kfd_alloc_struct(pdd->kobj_stats); + if (!pdd->kobj_stats) + return; + + ret = kobject_init_and_add(pdd->kobj_stats, + &procfs_stats_type, + p->kobj, + stats_dir_filename); + + if (ret) { + pr_warn("Creating KFD proc/stats_%s folder failed", + stats_dir_filename); + kobject_put(pdd->kobj_stats); + pdd->kobj_stats = NULL; + return; + } + + kfd_sysfs_create_file(pdd->kobj_stats, &pdd->attr_evict, + "evicted_ms"); + /* Add sysfs file to report compute unit occupancy */ + if (pdd->dev->kfd2kgd->get_cu_occupancy) + kfd_sysfs_create_file(pdd->kobj_stats, + &pdd->attr_cu_occupancy, + "cu_occupancy"); } +} - return ret; +static void kfd_procfs_add_sysfs_counters(struct kfd_process *p) +{ + int ret = 0; + int i; + char counters_dir_filename[MAX_SYSFS_FILENAME_LEN]; + + if (!p || !p->kobj) + return; + + /* + * Create sysfs files for each GPU which supports SVM + * - proc/<pid>/counters_<gpuid>/ + * - proc/<pid>/counters_<gpuid>/faults + * - proc/<pid>/counters_<gpuid>/page_in + * - proc/<pid>/counters_<gpuid>/page_out + */ + for_each_set_bit(i, p->svms.bitmap_supported, p->n_pdds) { + struct kfd_process_device *pdd = p->pdds[i]; + struct kobject *kobj_counters; + + snprintf(counters_dir_filename, MAX_SYSFS_FILENAME_LEN, + "counters_%u", pdd->dev->id); + kobj_counters = kfd_alloc_struct(kobj_counters); + if (!kobj_counters) + return; + + ret = kobject_init_and_add(kobj_counters, &sysfs_counters_type, + p->kobj, counters_dir_filename); + if (ret) { + pr_warn("Creating KFD proc/%s folder failed", + counters_dir_filename); + kobject_put(kobj_counters); + return; + } + + pdd->kobj_counters = kobj_counters; + kfd_sysfs_create_file(kobj_counters, &pdd->attr_faults, + "faults"); + kfd_sysfs_create_file(kobj_counters, &pdd->attr_page_in, + "page_in"); + kfd_sysfs_create_file(kobj_counters, &pdd->attr_page_out, + "page_out"); + } } +static void kfd_procfs_add_sysfs_files(struct kfd_process *p) +{ + int i; + + if (!p || !p->kobj) + return; + + /* + * Create sysfs files for each GPU: + * - proc/<pid>/vram_<gpuid> + * - proc/<pid>/sdma_<gpuid> + */ + for (i = 0; i < p->n_pdds; i++) { + struct kfd_process_device *pdd = p->pdds[i]; + + snprintf(pdd->vram_filename, MAX_SYSFS_FILENAME_LEN, "vram_%u", + pdd->dev->id); + kfd_sysfs_create_file(p->kobj, &pdd->attr_vram, + pdd->vram_filename); + + snprintf(pdd->sdma_filename, MAX_SYSFS_FILENAME_LEN, "sdma_%u", + pdd->dev->id); + kfd_sysfs_create_file(p->kobj, &pdd->attr_sdma, + pdd->sdma_filename); + } +} void kfd_procfs_del_queue(struct queue *q) { @@ -252,7 +692,8 @@ int kfd_process_create_wq(void) if (!kfd_process_wq) kfd_process_wq = alloc_workqueue("kfd_process_wq", 0, 0); if (!kfd_restore_wq) - kfd_restore_wq = alloc_ordered_workqueue("kfd_restore_wq", 0); + kfd_restore_wq = alloc_ordered_workqueue("kfd_restore_wq", + WQ_FREEZABLE); if (!kfd_process_wq || !kfd_restore_wq) { kfd_process_destroy_wq(); @@ -275,12 +716,18 @@ void kfd_process_destroy_wq(void) } static void kfd_process_free_gpuvm(struct kgd_mem *mem, - struct kfd_process_device *pdd) + struct kfd_process_device *pdd, void **kptr) { - struct kfd_dev *dev = pdd->dev; + struct kfd_node *dev = pdd->dev; - amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(dev->kgd, mem, pdd->vm); - amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->kgd, mem, NULL); + if (kptr && *kptr) { + amdgpu_amdkfd_gpuvm_unmap_gtt_bo_from_kernel(mem); + *kptr = NULL; + } + + amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(dev->adev, mem, pdd->drm_priv); + amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->adev, mem, pdd->drm_priv, + NULL); } /* kfd_process_alloc_gpuvm - Allocate GPU VM for the KFD process @@ -291,61 +738,47 @@ static void kfd_process_free_gpuvm(struct kgd_mem *mem, */ static int kfd_process_alloc_gpuvm(struct kfd_process_device *pdd, uint64_t gpu_va, uint32_t size, - uint32_t flags, void **kptr) + uint32_t flags, struct kgd_mem **mem, void **kptr) { - struct kfd_dev *kdev = pdd->dev; - struct kgd_mem *mem = NULL; - int handle; + struct kfd_node *kdev = pdd->dev; int err; - err = amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(kdev->kgd, gpu_va, size, - pdd->vm, &mem, NULL, flags); + err = amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(kdev->adev, gpu_va, size, + pdd->drm_priv, mem, NULL, + flags, false); if (err) goto err_alloc_mem; - err = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(kdev->kgd, mem, pdd->vm); + err = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(kdev->adev, *mem, + pdd->drm_priv); if (err) goto err_map_mem; - err = amdgpu_amdkfd_gpuvm_sync_memory(kdev->kgd, mem, true); + err = amdgpu_amdkfd_gpuvm_sync_memory(kdev->adev, *mem, true); if (err) { pr_debug("Sync memory failed, wait interrupted by user signal\n"); goto sync_memory_failed; } - /* Create an obj handle so kfd_process_device_remove_obj_handle - * will take care of the bo removal when the process finishes. - * We do not need to take p->mutex, because the process is just - * created and the ioctls have not had the chance to run. - */ - handle = kfd_process_device_create_obj_handle(pdd, mem); - - if (handle < 0) { - err = handle; - goto free_gpuvm; - } - if (kptr) { - err = amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(kdev->kgd, - (struct kgd_mem *)mem, kptr, NULL); + err = amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel( + (struct kgd_mem *)*mem, kptr, NULL); if (err) { pr_debug("Map GTT BO to kernel failed\n"); - goto free_obj_handle; + goto sync_memory_failed; } } return err; -free_obj_handle: - kfd_process_device_remove_obj_handle(pdd, handle); -free_gpuvm: sync_memory_failed: - kfd_process_free_gpuvm(mem, pdd); - return err; + amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(kdev->adev, *mem, pdd->drm_priv); err_map_mem: - amdgpu_amdkfd_gpuvm_free_memory_of_gpu(kdev->kgd, mem, NULL); + amdgpu_amdkfd_gpuvm_free_memory_of_gpu(kdev->adev, *mem, pdd->drm_priv, + NULL); err_alloc_mem: + *mem = NULL; *kptr = NULL; return err; } @@ -363,6 +796,7 @@ static int kfd_process_device_reserve_ib_mem(struct kfd_process_device *pdd) KFD_IOC_ALLOC_MEM_FLAGS_NO_SUBSTITUTE | KFD_IOC_ALLOC_MEM_FLAGS_WRITABLE | KFD_IOC_ALLOC_MEM_FLAGS_EXECUTABLE; + struct kgd_mem *mem; void *kaddr; int ret; @@ -371,27 +805,47 @@ static int kfd_process_device_reserve_ib_mem(struct kfd_process_device *pdd) /* ib_base is only set for dGPU */ ret = kfd_process_alloc_gpuvm(pdd, qpd->ib_base, PAGE_SIZE, flags, - &kaddr); + &mem, &kaddr); if (ret) return ret; + qpd->ib_mem = mem; qpd->ib_kaddr = kaddr; return 0; } -struct kfd_process *kfd_create_process(struct file *filep) +static void kfd_process_device_destroy_ib_mem(struct kfd_process_device *pdd) +{ + struct qcm_process_device *qpd = &pdd->qpd; + + if (!qpd->ib_kaddr || !qpd->ib_base) + return; + + kfd_process_free_gpuvm(qpd->ib_mem, pdd, &qpd->ib_kaddr); +} + +struct kfd_process *kfd_create_process(struct task_struct *thread) { struct kfd_process *process; - struct task_struct *thread = current; int ret; - if (!thread->mm) + if (!(thread->mm && mmget_not_zero(thread->mm))) return ERR_PTR(-EINVAL); /* Only the pthreads threading model is supported. */ - if (thread->group_leader->mm != thread->mm) + if (thread->group_leader->mm != thread->mm) { + mmput(thread->mm); return ERR_PTR(-EINVAL); + } + + /* If the process just called exec(3), it is possible that the + * cleanup of the kfd_process (following the release of the mm + * of the old process image) is still in the cleanup work queue. + * Make sure to drain any job before trying to recreate any + * resource for this process. + */ + flush_workqueue(kfd_process_wq); /* * take kfd processes mutex before starting of process creation @@ -400,8 +854,16 @@ struct kfd_process *kfd_create_process(struct file *filep) */ mutex_lock(&kfd_processes_mutex); - /* A prior open of /dev/kfd could have already created the process. */ - process = find_process(thread); + if (kfd_is_locked(NULL)) { + pr_debug("KFD is locked! Cannot create process"); + process = ERR_PTR(-EINVAL); + goto out; + } + + /* A prior open of /dev/kfd could have already created the process. + * find_process will increase process kref in this case + */ + process = find_process(thread, true); if (process) { pr_debug("Process already found\n"); } else { @@ -409,12 +871,6 @@ struct kfd_process *kfd_create_process(struct file *filep) if (IS_ERR(process)) goto out; - ret = kfd_process_init_cwsr_apu(process, filep); - if (ret) { - process = ERR_PTR(ret); - goto out; - } - if (!procfs.kobj) goto out; @@ -428,31 +884,29 @@ struct kfd_process *kfd_create_process(struct file *filep) (int)process->lead_thread->pid); if (ret) { pr_warn("Creating procfs pid directory failed"); + kobject_put(process->kobj); goto out; } - process->attr_pasid.name = "pasid"; - process->attr_pasid.mode = KFD_SYSFS_FILE_MODE; - sysfs_attr_init(&process->attr_pasid); - ret = sysfs_create_file(process->kobj, &process->attr_pasid); - if (ret) - pr_warn("Creating pasid for pid %d failed", - (int)process->lead_thread->pid); + kfd_sysfs_create_file(process->kobj, &process->attr_pasid, + "pasid"); process->kobj_queues = kobject_create_and_add("queues", process->kobj); if (!process->kobj_queues) pr_warn("Creating KFD proc/queues folder failed"); - ret = kfd_procfs_add_vram_usage(process); - if (ret) - pr_warn("Creating vram usage file for pid %d failed", - (int)process->lead_thread->pid); + kfd_procfs_add_sysfs_stats(process); + kfd_procfs_add_sysfs_files(process); + kfd_procfs_add_sysfs_counters(process); + + kfd_debugfs_add_process(process); + + init_waitqueue_head(&process->wait_irq_drain); } out: - if (!IS_ERR(process)) - kref_get(&process->ref); mutex_unlock(&kfd_processes_mutex); + mmput(thread->mm); return process; } @@ -468,7 +922,7 @@ struct kfd_process *kfd_get_process(const struct task_struct *thread) if (thread->group_leader->mm != thread->mm) return ERR_PTR(-EINVAL); - process = find_process(thread); + process = find_process(thread, false); if (!process) return ERR_PTR(-EINVAL); @@ -487,13 +941,16 @@ static struct kfd_process *find_process_by_mm(const struct mm_struct *mm) return NULL; } -static struct kfd_process *find_process(const struct task_struct *thread) +static struct kfd_process *find_process(const struct task_struct *thread, + bool ref) { struct kfd_process *p; int idx; idx = srcu_read_lock(&kfd_processes_srcu); p = find_process_by_mm(thread->mm); + if (p && ref) + kref_get(&p->ref); srcu_read_unlock(&kfd_processes_srcu, idx); return p; @@ -504,79 +961,193 @@ void kfd_unref_process(struct kfd_process *p) kref_put(&p->ref, kfd_process_ref_release); } +/* This increments the process->ref counter. */ +struct kfd_process *kfd_lookup_process_by_pid(struct pid *pid) +{ + struct task_struct *task = NULL; + struct kfd_process *p = NULL; + + if (!pid) { + task = current; + get_task_struct(task); + } else { + task = get_pid_task(pid, PIDTYPE_PID); + } + + if (task) { + p = find_process(task, true); + put_task_struct(task); + } + + return p; +} + static void kfd_process_device_free_bos(struct kfd_process_device *pdd) { struct kfd_process *p = pdd->process; void *mem; int id; + int i; /* * Remove all handles from idr and release appropriate * local memory object */ idr_for_each_entry(&pdd->alloc_idr, mem, id) { - struct kfd_process_device *peer_pdd; - list_for_each_entry(peer_pdd, &p->per_device_data, - per_device_list) { - if (!peer_pdd->vm) + for (i = 0; i < p->n_pdds; i++) { + struct kfd_process_device *peer_pdd = p->pdds[i]; + + if (!peer_pdd->drm_priv) continue; amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu( - peer_pdd->dev->kgd, mem, peer_pdd->vm); + peer_pdd->dev->adev, mem, peer_pdd->drm_priv); } - amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->kgd, mem, NULL); + amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->adev, mem, + pdd->drm_priv, NULL); kfd_process_device_remove_obj_handle(pdd, id); } } -static void kfd_process_free_outstanding_kfd_bos(struct kfd_process *p) +/* + * Just kunmap and unpin signal BO here. It will be freed in + * kfd_process_free_outstanding_kfd_bos() + */ +static void kfd_process_kunmap_signal_bo(struct kfd_process *p) { struct kfd_process_device *pdd; + struct kfd_node *kdev; + void *mem; - list_for_each_entry(pdd, &p->per_device_data, per_device_list) - kfd_process_device_free_bos(pdd); + kdev = kfd_device_by_id(GET_GPU_ID(p->signal_handle)); + if (!kdev) + return; + + mutex_lock(&p->mutex); + + pdd = kfd_get_process_device_data(kdev, p); + if (!pdd) + goto out; + + mem = kfd_process_device_translate_handle( + pdd, GET_IDR_HANDLE(p->signal_handle)); + if (!mem) + goto out; + + amdgpu_amdkfd_gpuvm_unmap_gtt_bo_from_kernel(mem); + +out: + mutex_unlock(&p->mutex); +} + +static void kfd_process_free_outstanding_kfd_bos(struct kfd_process *p) +{ + int i; + + for (i = 0; i < p->n_pdds; i++) + kfd_process_device_free_bos(p->pdds[i]); } static void kfd_process_destroy_pdds(struct kfd_process *p) { - struct kfd_process_device *pdd, *temp; + int i; - list_for_each_entry_safe(pdd, temp, &p->per_device_data, - per_device_list) { - pr_debug("Releasing pdd (topology id %d) for process (pasid 0x%x)\n", - pdd->dev->id, p->pasid); + for (i = 0; i < p->n_pdds; i++) { + struct kfd_process_device *pdd = p->pdds[i]; - if (pdd->drm_file) { - amdgpu_amdkfd_gpuvm_release_process_vm( - pdd->dev->kgd, pdd->vm); - fput(pdd->drm_file); - } - else if (pdd->vm) - amdgpu_amdkfd_gpuvm_destroy_process_vm( - pdd->dev->kgd, pdd->vm); + kfd_smi_event_process(pdd, false); - list_del(&pdd->per_device_list); + pr_debug("Releasing pdd (topology id %d, for pid %d)\n", + pdd->dev->id, p->lead_thread->pid); + kfd_process_device_destroy_cwsr_dgpu(pdd); + kfd_process_device_destroy_ib_mem(pdd); + + if (pdd->drm_file) + fput(pdd->drm_file); if (pdd->qpd.cwsr_kaddr && !pdd->qpd.cwsr_base) free_pages((unsigned long)pdd->qpd.cwsr_kaddr, get_order(KFD_CWSR_TBA_TMA_SIZE)); - kfree(pdd->qpd.doorbell_bitmap); idr_destroy(&pdd->alloc_idr); + kfd_free_process_doorbells(pdd->dev->kfd, pdd); + + if (pdd->dev->kfd->shared_resources.enable_mes && + pdd->proc_ctx_cpu_ptr) + amdgpu_amdkfd_free_gtt_mem(pdd->dev->adev, + &pdd->proc_ctx_bo); /* * before destroying pdd, make sure to report availability * for auto suspend */ if (pdd->runtime_inuse) { - pm_runtime_mark_last_busy(pdd->dev->ddev->dev); - pm_runtime_put_autosuspend(pdd->dev->ddev->dev); + pm_runtime_put_autosuspend(adev_to_drm(pdd->dev->adev)->dev); pdd->runtime_inuse = false; } + atomic_dec(&pdd->dev->kfd->kfd_processes_count); + kfree(pdd); + p->pdds[i] = NULL; } + p->n_pdds = 0; +} + +static void kfd_process_remove_sysfs(struct kfd_process *p) +{ + struct kfd_process_device *pdd; + int i; + + if (!p->kobj) + return; + + sysfs_remove_file(p->kobj, &p->attr_pasid); + kobject_del(p->kobj_queues); + kobject_put(p->kobj_queues); + p->kobj_queues = NULL; + + for (i = 0; i < p->n_pdds; i++) { + pdd = p->pdds[i]; + + sysfs_remove_file(p->kobj, &pdd->attr_vram); + sysfs_remove_file(p->kobj, &pdd->attr_sdma); + + sysfs_remove_file(pdd->kobj_stats, &pdd->attr_evict); + if (pdd->dev->kfd2kgd->get_cu_occupancy) + sysfs_remove_file(pdd->kobj_stats, + &pdd->attr_cu_occupancy); + kobject_del(pdd->kobj_stats); + kobject_put(pdd->kobj_stats); + pdd->kobj_stats = NULL; + } + + for_each_set_bit(i, p->svms.bitmap_supported, p->n_pdds) { + pdd = p->pdds[i]; + + sysfs_remove_file(pdd->kobj_counters, &pdd->attr_faults); + sysfs_remove_file(pdd->kobj_counters, &pdd->attr_page_in); + sysfs_remove_file(pdd->kobj_counters, &pdd->attr_page_out); + kobject_del(pdd->kobj_counters); + kobject_put(pdd->kobj_counters); + pdd->kobj_counters = NULL; + } + + kobject_del(p->kobj); + kobject_put(p->kobj); + p->kobj = NULL; +} + +/* + * If any GPU is ongoing reset, wait for reset complete. + */ +static void kfd_process_wait_gpu_reset_complete(struct kfd_process *p) +{ + int i; + + for (i = 0; i < p->n_pdds; i++) + flush_workqueue(p->pdds[i]->dev->adev->reset_domain->wq); } /* No process locking is needed in this function, because the process @@ -588,35 +1159,34 @@ static void kfd_process_wq_release(struct work_struct *work) { struct kfd_process *p = container_of(work, struct kfd_process, release_work); - struct kfd_process_device *pdd; + struct dma_fence *ef; - /* Remove the procfs files */ - if (p->kobj) { - sysfs_remove_file(p->kobj, &p->attr_pasid); - kobject_del(p->kobj_queues); - kobject_put(p->kobj_queues); - p->kobj_queues = NULL; - - list_for_each_entry(pdd, &p->per_device_data, per_device_list) - sysfs_remove_file(p->kobj, &pdd->attr_vram); + /* + * If GPU in reset, user queues may still running, wait for reset complete. + */ + kfd_process_wait_gpu_reset_complete(p); - kobject_del(p->kobj); - kobject_put(p->kobj); - p->kobj = NULL; - } + /* Signal the eviction fence after user mode queues are + * destroyed. This allows any BOs to be freed without + * triggering pointless evictions or waiting for fences. + */ + synchronize_rcu(); + ef = rcu_access_pointer(p->ef); + if (ef) + dma_fence_signal(ef); - kfd_iommu_unbind_process(p); + kfd_process_remove_sysfs(p); + kfd_debugfs_remove_process(p); + kfd_process_kunmap_signal_bo(p); kfd_process_free_outstanding_kfd_bos(p); + svm_range_list_fini(p); kfd_process_destroy_pdds(p); - dma_fence_put(p->ef); + dma_fence_put(ef); kfd_event_free_process(p); - kfd_pasid_free(p->pasid); - kfd_free_process_doorbells(p); - mutex_destroy(&p->mutex); put_task_struct(p->lead_thread); @@ -632,16 +1202,71 @@ static void kfd_process_ref_release(struct kref *ref) queue_work(kfd_process_wq, &p->release_work); } +static struct mmu_notifier *kfd_process_alloc_notifier(struct mm_struct *mm) +{ + /* This increments p->ref counter if kfd process p exists */ + struct kfd_process *p = kfd_lookup_process_by_mm(mm); + + return p ? &p->mmu_notifier : ERR_PTR(-ESRCH); +} + static void kfd_process_free_notifier(struct mmu_notifier *mn) { kfd_unref_process(container_of(mn, struct kfd_process, mmu_notifier)); } +static void kfd_process_notifier_release_internal(struct kfd_process *p) +{ + int i; + + cancel_delayed_work_sync(&p->eviction_work); + cancel_delayed_work_sync(&p->restore_work); + + /* + * Dequeue and destroy user queues, it is not safe for GPU to access + * system memory after mmu release notifier callback returns because + * exit_mmap free process memory afterwards. + */ + kfd_process_dequeue_from_all_devices(p); + pqm_uninit(&p->pqm); + + for (i = 0; i < p->n_pdds; i++) { + struct kfd_process_device *pdd = p->pdds[i]; + + /* re-enable GFX OFF since runtime enable with ttmp setup disabled it. */ + if (!kfd_dbg_is_rlc_restore_supported(pdd->dev) && p->runtime_info.ttmp_setup) + amdgpu_gfx_off_ctrl(pdd->dev->adev, true); + } + + /* Indicate to other users that MM is no longer valid */ + p->mm = NULL; + kfd_dbg_trap_disable(p); + + if (atomic_read(&p->debugged_process_count) > 0) { + struct kfd_process *target; + unsigned int temp; + int idx = srcu_read_lock(&kfd_processes_srcu); + + hash_for_each_rcu(kfd_processes_table, temp, target, kfd_processes) { + if (target->debugger_process && target->debugger_process == p) { + mutex_lock_nested(&target->mutex, 1); + kfd_dbg_trap_disable(target); + mutex_unlock(&target->mutex); + if (atomic_read(&p->debugged_process_count) == 0) + break; + } + } + + srcu_read_unlock(&kfd_processes_srcu, idx); + } + + mmu_notifier_put(&p->mmu_notifier); +} + static void kfd_process_notifier_release(struct mmu_notifier *mn, struct mm_struct *mm) { struct kfd_process *p; - struct kfd_process_device *pdd = NULL; /* * The kfd_process structure can not be free because the @@ -652,63 +1277,80 @@ static void kfd_process_notifier_release(struct mmu_notifier *mn, return; mutex_lock(&kfd_processes_mutex); + /* + * Do early return if table is empty. + * + * This could potentially happen if this function is called concurrently + * by mmu_notifier and by kfd_cleanup_pocesses. + * + */ + if (hash_empty(kfd_processes_table)) { + mutex_unlock(&kfd_processes_mutex); + return; + } hash_del_rcu(&p->kfd_processes); mutex_unlock(&kfd_processes_mutex); synchronize_srcu(&kfd_processes_srcu); - cancel_delayed_work_sync(&p->eviction_work); - cancel_delayed_work_sync(&p->restore_work); + kfd_process_notifier_release_internal(p); +} - mutex_lock(&p->mutex); +static const struct mmu_notifier_ops kfd_process_mmu_notifier_ops = { + .release = kfd_process_notifier_release, + .alloc_notifier = kfd_process_alloc_notifier, + .free_notifier = kfd_process_free_notifier, +}; + +/* + * This code handles the case when driver is being unloaded before all + * mm_struct are released. We need to safely free the kfd_process and + * avoid race conditions with mmu_notifier that might try to free them. + * + */ +void kfd_cleanup_processes(void) +{ + struct kfd_process *p; + struct hlist_node *p_temp; + unsigned int temp; + HLIST_HEAD(cleanup_list); - /* Iterate over all process device data structures and if the - * pdd is in debug mode, we should first force unregistration, - * then we will be able to destroy the queues + /* + * Move all remaining kfd_process from the process table to a + * temp list for processing. Once done, callback from mmu_notifier + * release will not see the kfd_process in the table and do early return, + * avoiding double free issues. */ - list_for_each_entry(pdd, &p->per_device_data, per_device_list) { - struct kfd_dev *dev = pdd->dev; - - mutex_lock(kfd_get_dbgmgr_mutex()); - if (dev && dev->dbgmgr && dev->dbgmgr->pasid == p->pasid) { - if (!kfd_dbgmgr_unregister(dev->dbgmgr, p)) { - kfd_dbgmgr_destroy(dev->dbgmgr); - dev->dbgmgr = NULL; - } - } - mutex_unlock(kfd_get_dbgmgr_mutex()); + mutex_lock(&kfd_processes_mutex); + hash_for_each_safe(kfd_processes_table, temp, p_temp, p, kfd_processes) { + hash_del_rcu(&p->kfd_processes); + synchronize_srcu(&kfd_processes_srcu); + hlist_add_head(&p->kfd_processes, &cleanup_list); } + mutex_unlock(&kfd_processes_mutex); - kfd_process_dequeue_from_all_devices(p); - pqm_uninit(&p->pqm); + hlist_for_each_entry_safe(p, p_temp, &cleanup_list, kfd_processes) + kfd_process_notifier_release_internal(p); - /* Indicate to other users that MM is no longer valid */ - p->mm = NULL; - /* Signal the eviction fence after user mode queues are - * destroyed. This allows any BOs to be freed without - * triggering pointless evictions or waiting for fences. + /* + * Ensures that all outstanding free_notifier get called, triggering + * the release of the kfd_process struct. */ - dma_fence_signal(p->ef); - - mutex_unlock(&p->mutex); - - mmu_notifier_put(&p->mmu_notifier); + mmu_notifier_synchronize(); } -static const struct mmu_notifier_ops kfd_process_mmu_notifier_ops = { - .release = kfd_process_notifier_release, - .free_notifier = kfd_process_free_notifier, -}; - -static int kfd_process_init_cwsr_apu(struct kfd_process *p, struct file *filep) +int kfd_process_init_cwsr_apu(struct kfd_process *p, struct file *filep) { unsigned long offset; - struct kfd_process_device *pdd; + int i; - list_for_each_entry(pdd, &p->per_device_data, per_device_list) { - struct kfd_dev *dev = pdd->dev; - struct qcm_process_device *qpd = &pdd->qpd; + if (p->has_cwsr) + return 0; - if (!dev->cwsr_enabled || qpd->cwsr_kaddr || qpd->cwsr_base) + for (i = 0; i < p->n_pdds; i++) { + struct kfd_node *dev = p->pdds[i]->dev; + struct qcm_process_device *qpd = &p->pdds[i]->qpd; + + if (!dev->kfd->cwsr_enabled || qpd->cwsr_kaddr || qpd->cwsr_base) continue; offset = KFD_MMAP_TYPE_RESERVED_MEM | KFD_MMAP_GPU_ID(dev->id); @@ -719,45 +1361,55 @@ static int kfd_process_init_cwsr_apu(struct kfd_process *p, struct file *filep) if (IS_ERR_VALUE(qpd->tba_addr)) { int err = qpd->tba_addr; - pr_err("Failure to set tba address. error %d.\n", err); + dev_err(dev->adev->dev, + "Failure to set tba address. error %d.\n", err); qpd->tba_addr = 0; qpd->cwsr_kaddr = NULL; return err; } - memcpy(qpd->cwsr_kaddr, dev->cwsr_isa, dev->cwsr_isa_size); + memcpy(qpd->cwsr_kaddr, dev->kfd->cwsr_isa, dev->kfd->cwsr_isa_size); + + kfd_process_set_trap_debug_flag(qpd, p->debug_trap_enabled); qpd->tma_addr = qpd->tba_addr + KFD_CWSR_TMA_OFFSET; pr_debug("set tba :0x%llx, tma:0x%llx, cwsr_kaddr:%p for pqm.\n", qpd->tba_addr, qpd->tma_addr, qpd->cwsr_kaddr); } + p->has_cwsr = true; + return 0; } static int kfd_process_device_init_cwsr_dgpu(struct kfd_process_device *pdd) { - struct kfd_dev *dev = pdd->dev; + struct kfd_node *dev = pdd->dev; struct qcm_process_device *qpd = &pdd->qpd; uint32_t flags = KFD_IOC_ALLOC_MEM_FLAGS_GTT | KFD_IOC_ALLOC_MEM_FLAGS_NO_SUBSTITUTE | KFD_IOC_ALLOC_MEM_FLAGS_EXECUTABLE; + struct kgd_mem *mem; void *kaddr; int ret; - if (!dev->cwsr_enabled || qpd->cwsr_kaddr || !qpd->cwsr_base) + if (!dev->kfd->cwsr_enabled || qpd->cwsr_kaddr || !qpd->cwsr_base) return 0; /* cwsr_base is only set for dGPU */ ret = kfd_process_alloc_gpuvm(pdd, qpd->cwsr_base, - KFD_CWSR_TBA_TMA_SIZE, flags, &kaddr); + KFD_CWSR_TBA_TMA_SIZE, flags, &mem, &kaddr); if (ret) return ret; + qpd->cwsr_mem = mem; qpd->cwsr_kaddr = kaddr; qpd->tba_addr = qpd->cwsr_base; - memcpy(qpd->cwsr_kaddr, dev->cwsr_isa, dev->cwsr_isa_size); + memcpy(qpd->cwsr_kaddr, dev->kfd->cwsr_isa, dev->kfd->cwsr_isa_size); + + kfd_process_set_trap_debug_flag(&pdd->qpd, + pdd->process->debug_trap_enabled); qpd->tma_addr = qpd->tba_addr + KFD_CWSR_TMA_OFFSET; pr_debug("set tba :0x%llx, tma:0x%llx, cwsr_kaddr:%p for pqm.\n", @@ -766,6 +1418,100 @@ static int kfd_process_device_init_cwsr_dgpu(struct kfd_process_device *pdd) return 0; } +static void kfd_process_device_destroy_cwsr_dgpu(struct kfd_process_device *pdd) +{ + struct kfd_node *dev = pdd->dev; + struct qcm_process_device *qpd = &pdd->qpd; + + if (!dev->kfd->cwsr_enabled || !qpd->cwsr_kaddr || !qpd->cwsr_base) + return; + + kfd_process_free_gpuvm(qpd->cwsr_mem, pdd, &qpd->cwsr_kaddr); +} + +void kfd_process_set_trap_handler(struct qcm_process_device *qpd, + uint64_t tba_addr, + uint64_t tma_addr) +{ + if (qpd->cwsr_kaddr) { + /* KFD trap handler is bound, record as second-level TBA/TMA + * in first-level TMA. First-level trap will jump to second. + */ + uint64_t *tma = + (uint64_t *)(qpd->cwsr_kaddr + KFD_CWSR_TMA_OFFSET); + tma[0] = tba_addr; + tma[1] = tma_addr; + } else { + /* No trap handler bound, bind as first-level TBA/TMA. */ + qpd->tba_addr = tba_addr; + qpd->tma_addr = tma_addr; + } +} + +bool kfd_process_xnack_mode(struct kfd_process *p, bool supported) +{ + int i; + + /* On most GFXv9 GPUs, the retry mode in the SQ must match the + * boot time retry setting. Mixing processes with different + * XNACK/retry settings can hang the GPU. + * + * Different GPUs can have different noretry settings depending + * on HW bugs or limitations. We need to find at least one + * XNACK mode for this process that's compatible with all GPUs. + * Fortunately GPUs with retry enabled (noretry=0) can run code + * built for XNACK-off. On GFXv9 it may perform slower. + * + * Therefore applications built for XNACK-off can always be + * supported and will be our fallback if any GPU does not + * support retry. + */ + for (i = 0; i < p->n_pdds; i++) { + struct kfd_node *dev = p->pdds[i]->dev; + + /* Only consider GFXv9 and higher GPUs. Older GPUs don't + * support the SVM APIs and don't need to be considered + * for the XNACK mode selection. + */ + if (!KFD_IS_SOC15(dev)) + continue; + /* Aldebaran can always support XNACK because it can support + * per-process XNACK mode selection. But let the dev->noretry + * setting still influence the default XNACK mode. + */ + if (supported && KFD_SUPPORT_XNACK_PER_PROCESS(dev)) { + if (!amdgpu_sriov_xnack_support(dev->kfd->adev)) { + pr_debug("SRIOV platform xnack not supported\n"); + return false; + } + continue; + } + + /* GFXv10 and later GPUs do not support shader preemption + * during page faults. This can lead to poor QoS for queue + * management and memory-manager-related preemptions or + * even deadlocks. + */ + if (KFD_GC_VERSION(dev) >= IP_VERSION(10, 1, 1)) + return false; + + if (dev->kfd->noretry) + return false; + } + + return true; +} + +void kfd_process_set_trap_debug_flag(struct qcm_process_device *qpd, + bool enabled) +{ + if (qpd->cwsr_kaddr) { + uint64_t *tma = + (uint64_t *)(qpd->cwsr_kaddr + KFD_CWSR_TMA_OFFSET); + tma[2] = enabled; + } +} + /* * On return the kfd_process is fully operational and will be freed when the * mm is released @@ -773,6 +1519,7 @@ static int kfd_process_device_init_cwsr_dgpu(struct kfd_process_device *pdd) static struct kfd_process *create_process(const struct task_struct *thread) { struct kfd_process *process; + struct mmu_notifier *mn; int err = -ENOMEM; process = kzalloc(sizeof(*process), GFP_KERNEL); @@ -783,19 +1530,20 @@ static struct kfd_process *create_process(const struct task_struct *thread) mutex_init(&process->mutex); process->mm = thread->mm; process->lead_thread = thread->group_leader; - INIT_LIST_HEAD(&process->per_device_data); + process->n_pdds = 0; + process->queues_paused = false; INIT_DELAYED_WORK(&process->eviction_work, evict_process_worker); INIT_DELAYED_WORK(&process->restore_work, restore_process_worker); process->last_restore_timestamp = get_jiffies_64(); - kfd_event_init_process(process); + err = kfd_event_init_process(process); + if (err) + goto err_event_init; process->is_32bit_user_mode = in_compat_syscall(); - - process->pasid = kfd_pasid_alloc(); - if (process->pasid == 0) - goto err_alloc_pasid; - - if (kfd_alloc_process_doorbells(process) < 0) - goto err_alloc_doorbells; + process->debug_trap_enabled = false; + process->debugger_process = NULL; + process->exception_enable_mask = 0; + atomic_set(&process->debugged_process_count, 0); + sema_init(&process->runtime_enable_sema, 0); err = pqm_init(&process->pqm, process); if (err != 0) @@ -806,94 +1554,81 @@ static struct kfd_process *create_process(const struct task_struct *thread) if (err != 0) goto err_init_apertures; - /* Must be last, have to use release destruction after this */ - process->mmu_notifier.ops = &kfd_process_mmu_notifier_ops; - err = mmu_notifier_register(&process->mmu_notifier, process->mm); + /* Check XNACK support after PDDs are created in kfd_init_apertures */ + process->xnack_enabled = kfd_process_xnack_mode(process, false); + + err = svm_range_list_init(process); if (err) - goto err_register_notifier; + goto err_init_svm_range_list; - get_task_struct(process->lead_thread); + /* alloc_notifier needs to find the process in the hash table */ hash_add_rcu(kfd_processes_table, &process->kfd_processes, (uintptr_t)process->mm); + /* Avoid free_notifier to start kfd_process_wq_release if + * mmu_notifier_get failed because of pending signal. + */ + kref_get(&process->ref); + + /* MMU notifier registration must be the last call that can fail + * because after this point we cannot unwind the process creation. + * After this point, mmu_notifier_put will trigger the cleanup by + * dropping the last process reference in the free_notifier. + */ + mn = mmu_notifier_get(&kfd_process_mmu_notifier_ops, process->mm); + if (IS_ERR(mn)) { + err = PTR_ERR(mn); + goto err_register_notifier; + } + BUG_ON(mn != &process->mmu_notifier); + + kfd_unref_process(process); + get_task_struct(process->lead_thread); + + INIT_WORK(&process->debug_event_workarea, debug_event_write_work_handler); + return process; err_register_notifier: + hash_del_rcu(&process->kfd_processes); + svm_range_list_fini(process); +err_init_svm_range_list: kfd_process_free_outstanding_kfd_bos(process); kfd_process_destroy_pdds(process); err_init_apertures: pqm_uninit(&process->pqm); err_process_pqm_init: - kfd_free_process_doorbells(process); -err_alloc_doorbells: - kfd_pasid_free(process->pasid); -err_alloc_pasid: + kfd_event_free_process(process); +err_event_init: mutex_destroy(&process->mutex); kfree(process); err_alloc_process: return ERR_PTR(err); } -static int init_doorbell_bitmap(struct qcm_process_device *qpd, - struct kfd_dev *dev) -{ - unsigned int i; - int range_start = dev->shared_resources.non_cp_doorbells_start; - int range_end = dev->shared_resources.non_cp_doorbells_end; - - if (!KFD_IS_SOC15(dev->device_info->asic_family)) - return 0; - - qpd->doorbell_bitmap = - kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS, - BITS_PER_BYTE), GFP_KERNEL); - if (!qpd->doorbell_bitmap) - return -ENOMEM; - - /* Mask out doorbells reserved for SDMA, IH, and VCN on SOC15. */ - pr_debug("reserved doorbell 0x%03x - 0x%03x\n", range_start, range_end); - pr_debug("reserved doorbell 0x%03x - 0x%03x\n", - range_start + KFD_QUEUE_DOORBELL_MIRROR_OFFSET, - range_end + KFD_QUEUE_DOORBELL_MIRROR_OFFSET); - - for (i = 0; i < KFD_MAX_NUM_OF_QUEUES_PER_PROCESS / 2; i++) { - if (i >= range_start && i <= range_end) { - set_bit(i, qpd->doorbell_bitmap); - set_bit(i + KFD_QUEUE_DOORBELL_MIRROR_OFFSET, - qpd->doorbell_bitmap); - } - } - - return 0; -} - -struct kfd_process_device *kfd_get_process_device_data(struct kfd_dev *dev, +struct kfd_process_device *kfd_get_process_device_data(struct kfd_node *dev, struct kfd_process *p) { - struct kfd_process_device *pdd = NULL; + int i; - list_for_each_entry(pdd, &p->per_device_data, per_device_list) - if (pdd->dev == dev) - return pdd; + for (i = 0; i < p->n_pdds; i++) + if (p->pdds[i]->dev == dev) + return p->pdds[i]; return NULL; } -struct kfd_process_device *kfd_create_process_device_data(struct kfd_dev *dev, +struct kfd_process_device *kfd_create_process_device_data(struct kfd_node *dev, struct kfd_process *p) { struct kfd_process_device *pdd = NULL; + if (WARN_ON_ONCE(p->n_pdds >= MAX_GPU_INSTANCE)) + return NULL; pdd = kzalloc(sizeof(*pdd), GFP_KERNEL); if (!pdd) return NULL; - if (init_doorbell_bitmap(&pdd->qpd, dev)) { - pr_err("Failed to init doorbell for process\n"); - kfree(pdd); - return NULL; - } - pdd->dev = dev; INIT_LIST_HEAD(&pdd->qpd.queues_list); INIT_LIST_HEAD(&pdd->qpd.priv_queue_list); @@ -905,12 +1640,23 @@ struct kfd_process_device *kfd_create_process_device_data(struct kfd_dev *dev, pdd->bound = PDD_UNBOUND; pdd->already_dequeued = false; pdd->runtime_inuse = false; - pdd->vram_usage = 0; - list_add(&pdd->per_device_list, &p->per_device_data); + atomic64_set(&pdd->vram_usage, 0); + pdd->sdma_past_activity_counter = 0; + pdd->user_gpu_id = dev->id; + atomic64_set(&pdd->evict_duration_counter, 0); + + p->pdds[p->n_pdds++] = pdd; + if (kfd_dbg_is_per_vmid_supported(pdd->dev)) + pdd->spi_dbg_override = pdd->dev->kfd2kgd->disable_debug_trap( + pdd->dev->adev, + false, + 0); /* Init idr used for memory handle translation */ idr_init(&pdd->alloc_idr); + atomic_inc(&dev->kfd->kfd_processes_count); + return pdd; } @@ -931,29 +1677,39 @@ struct kfd_process_device *kfd_create_process_device_data(struct kfd_dev *dev, int kfd_process_device_init_vm(struct kfd_process_device *pdd, struct file *drm_file) { + struct amdgpu_fpriv *drv_priv; + struct amdgpu_vm *avm; struct kfd_process *p; - struct kfd_dev *dev; + struct dma_fence *ef; + struct kfd_node *dev; int ret; - if (pdd->vm) - return drm_file ? -EBUSY : 0; + if (!drm_file) + return -EINVAL; + + if (pdd->drm_priv) + return -EBUSY; + + ret = amdgpu_file_to_fpriv(drm_file, &drv_priv); + if (ret) + return ret; + avm = &drv_priv->vm; p = pdd->process; dev = pdd->dev; - if (drm_file) - ret = amdgpu_amdkfd_gpuvm_acquire_process_vm( - dev->kgd, drm_file, p->pasid, - &pdd->vm, &p->kgd_process_info, &p->ef); - else - ret = amdgpu_amdkfd_gpuvm_create_process_vm(dev->kgd, p->pasid, - &pdd->vm, &p->kgd_process_info, &p->ef); + ret = amdgpu_amdkfd_gpuvm_acquire_process_vm(dev->adev, avm, + &p->kgd_process_info, + p->ef ? NULL : &ef); if (ret) { - pr_err("Failed to create process VM object\n"); + dev_err(dev->adev->dev, "Failed to create process VM object\n"); return ret; } - amdgpu_vm_set_task_info(pdd->vm); + if (!p->ef) + RCU_INIT_POINTER(p->ef, ef); + + pdd->drm_priv = drm_file->private_data; ret = kfd_process_device_reserve_ib_mem(pdd); if (ret) @@ -962,16 +1718,27 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd, if (ret) goto err_init_cwsr; + if (unlikely(!avm->pasid)) { + dev_warn(pdd->dev->adev->dev, "WARN: vm %p has no pasid associated", + avm); + ret = -EINVAL; + goto err_get_pasid; + } + + pdd->pasid = avm->pasid; pdd->drm_file = drm_file; + kfd_smi_event_process(pdd, true); + return 0; +err_get_pasid: + kfd_process_device_destroy_cwsr_dgpu(pdd); err_init_cwsr: + kfd_process_device_destroy_ib_mem(pdd); err_reserve_ib_mem: - kfd_process_device_free_bos(pdd); - if (!drm_file) - amdgpu_amdkfd_gpuvm_destroy_process_vm(dev->kgd, pdd->vm); - pdd->vm = NULL; + pdd->drm_priv = NULL; + amdgpu_amdkfd_gpuvm_destroy_cb(dev->adev, avm); return ret; } @@ -983,7 +1750,7 @@ err_reserve_ib_mem: * * Assumes that the process lock is held. */ -struct kfd_process_device *kfd_bind_process_to_device(struct kfd_dev *dev, +struct kfd_process_device *kfd_bind_process_to_device(struct kfd_node *dev, struct kfd_process *p) { struct kfd_process_device *pdd; @@ -991,29 +1758,26 @@ struct kfd_process_device *kfd_bind_process_to_device(struct kfd_dev *dev, pdd = kfd_get_process_device_data(dev, p); if (!pdd) { - pr_err("Process device data doesn't exist\n"); + dev_err(dev->adev->dev, "Process device data doesn't exist\n"); return ERR_PTR(-ENOMEM); } + if (!pdd->drm_priv) + return ERR_PTR(-ENODEV); + /* * signal runtime-pm system to auto resume and prevent * further runtime suspend once device pdd is created until * pdd is destroyed. */ if (!pdd->runtime_inuse) { - err = pm_runtime_get_sync(dev->ddev->dev); - if (err < 0) + err = pm_runtime_get_sync(adev_to_drm(dev->adev)->dev); + if (err < 0) { + pm_runtime_put_autosuspend(adev_to_drm(dev->adev)->dev); return ERR_PTR(err); + } } - err = kfd_iommu_bind_process_to_device(pdd); - if (err) - goto out; - - err = kfd_process_device_init_vm(pdd, NULL); - if (err) - goto out; - /* * make sure that runtime_usage counter is incremented just once * per pdd @@ -1021,37 +1785,6 @@ struct kfd_process_device *kfd_bind_process_to_device(struct kfd_dev *dev, pdd->runtime_inuse = true; return pdd; - -out: - /* balance runpm reference count and exit with error */ - if (!pdd->runtime_inuse) { - pm_runtime_mark_last_busy(dev->ddev->dev); - pm_runtime_put_autosuspend(dev->ddev->dev); - } - - return ERR_PTR(err); -} - -struct kfd_process_device *kfd_get_first_process_device_data( - struct kfd_process *p) -{ - return list_first_entry(&p->per_device_data, - struct kfd_process_device, - per_device_list); -} - -struct kfd_process_device *kfd_get_next_process_device_data( - struct kfd_process *p, - struct kfd_process_device *pdd) -{ - if (list_is_last(&pdd->per_device_list, &p->per_device_data)) - return NULL; - return list_next_entry(pdd, per_device_list); -} - -bool kfd_has_process_device_data(struct kfd_process *p) -{ - return !(list_empty(&p->per_device_data)); } /* Create specific handle mapped to mem from process local memory idr @@ -1085,25 +1818,50 @@ void kfd_process_device_remove_obj_handle(struct kfd_process_device *pdd, idr_remove(&pdd->alloc_idr, handle); } -/* This increments the process->ref counter. */ -struct kfd_process *kfd_lookup_process_by_pasid(unsigned int pasid) +static struct kfd_process_device *kfd_lookup_process_device_by_pasid(u32 pasid) { - struct kfd_process *p, *ret_p = NULL; + struct kfd_process_device *ret_p = NULL; + struct kfd_process *p; unsigned int temp; - - int idx = srcu_read_lock(&kfd_processes_srcu); + int i; hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) { - if (p->pasid == pasid) { - kref_get(&p->ref); - ret_p = p; - break; + for (i = 0; i < p->n_pdds; i++) { + if (p->pdds[i]->pasid == pasid) { + ret_p = p->pdds[i]; + break; + } } + if (ret_p) + break; + } + return ret_p; +} + +/* This increments the process->ref counter. */ +struct kfd_process *kfd_lookup_process_by_pasid(u32 pasid, + struct kfd_process_device **pdd) +{ + struct kfd_process_device *ret_p; + + int idx = srcu_read_lock(&kfd_processes_srcu); + + ret_p = kfd_lookup_process_device_by_pasid(pasid); + if (ret_p) { + if (pdd) + *pdd = ret_p; + kref_get(&ret_p->process->ref); + + srcu_read_unlock(&kfd_processes_srcu, idx); + return ret_p->process; } srcu_read_unlock(&kfd_processes_srcu, idx); - return ret_p; + if (pdd) + *pdd = NULL; + + return NULL; } /* This increments the process->ref counter. */ @@ -1127,20 +1885,32 @@ struct kfd_process *kfd_lookup_process_by_mm(const struct mm_struct *mm) * Eviction is reference-counted per process-device. This means multiple * evictions from different sources can be nested safely. */ -int kfd_process_evict_queues(struct kfd_process *p) +int kfd_process_evict_queues(struct kfd_process *p, uint32_t trigger) { - struct kfd_process_device *pdd; int r = 0; + int i; unsigned int n_evicted = 0; - list_for_each_entry(pdd, &p->per_device_data, per_device_list) { + for (i = 0; i < p->n_pdds; i++) { + struct kfd_process_device *pdd = p->pdds[i]; + struct device *dev = pdd->dev->adev->dev; + + kfd_smi_event_queue_eviction(pdd->dev, p->lead_thread->pid, + trigger); + r = pdd->dev->dqm->ops.evict_process_queues(pdd->dev->dqm, &pdd->qpd); - if (r) { - pr_err("Failed to evict process queues\n"); + /* evict return -EIO if HWS is hang or asic is resetting, in this case + * we would like to set all the queues to be in evicted state to prevent + * them been add back since they actually not be saved right now. + */ + if (r && r != -EIO) { + dev_err(dev, "Failed to evict process queues\n"); goto fail; } n_evicted++; + + pdd->dev->dqm->is_hws_hang = false; } return r; @@ -1149,12 +1919,18 @@ fail: /* To keep state consistent, roll back partial eviction by * restoring queues */ - list_for_each_entry(pdd, &p->per_device_data, per_device_list) { + for (i = 0; i < p->n_pdds; i++) { + struct kfd_process_device *pdd = p->pdds[i]; + if (n_evicted == 0) break; + + kfd_smi_event_queue_restore(pdd->dev, p->lead_thread->pid); + if (pdd->dev->dqm->ops.restore_process_queues(pdd->dev->dqm, &pdd->qpd)) - pr_err("Failed to restore queues\n"); + dev_err(pdd->dev->adev->dev, + "Failed to restore queues\n"); n_evicted--; } @@ -1165,14 +1941,19 @@ fail: /* kfd_process_restore_queues - Restore all user queues of a process */ int kfd_process_restore_queues(struct kfd_process *p) { - struct kfd_process_device *pdd; int r, ret = 0; + int i; + + for (i = 0; i < p->n_pdds; i++) { + struct kfd_process_device *pdd = p->pdds[i]; + struct device *dev = pdd->dev->adev->dev; + + kfd_smi_event_queue_restore(pdd->dev, p->lead_thread->pid); - list_for_each_entry(pdd, &p->per_device_data, per_device_list) { r = pdd->dev->dqm->ops.restore_process_queues(pdd->dev->dqm, &pdd->qpd); if (r) { - pr_err("Failed to restore process queues\n"); + dev_err(dev, "Failed to restore process queues\n"); if (!ret) ret = r; } @@ -1181,6 +1962,48 @@ int kfd_process_restore_queues(struct kfd_process *p) return ret; } +int kfd_process_gpuidx_from_gpuid(struct kfd_process *p, uint32_t gpu_id) +{ + int i; + + for (i = 0; i < p->n_pdds; i++) + if (p->pdds[i] && gpu_id == p->pdds[i]->user_gpu_id) + return i; + return -EINVAL; +} + +int +kfd_process_gpuid_from_node(struct kfd_process *p, struct kfd_node *node, + uint32_t *gpuid, uint32_t *gpuidx) +{ + int i; + + for (i = 0; i < p->n_pdds; i++) + if (p->pdds[i] && p->pdds[i]->dev == node) { + *gpuid = p->pdds[i]->user_gpu_id; + *gpuidx = i; + return 0; + } + return -EINVAL; +} + +static int signal_eviction_fence(struct kfd_process *p) +{ + struct dma_fence *ef; + int ret; + + rcu_read_lock(); + ef = dma_fence_get_rcu_safe(&p->ef); + rcu_read_unlock(); + if (!ef) + return -EINVAL; + + ret = dma_fence_signal(ef); + dma_fence_put(ef); + + return ret; +} + static void evict_process_worker(struct work_struct *work) { int ret; @@ -1193,29 +2016,45 @@ static void evict_process_worker(struct work_struct *work) * lifetime of this thread, kfd_process p will be valid */ p = container_of(dwork, struct kfd_process, eviction_work); - WARN_ONCE(p->last_eviction_seqno != p->ef->seqno, - "Eviction fence mismatch\n"); - - /* Narrow window of overlap between restore and evict work - * item is possible. Once amdgpu_amdkfd_gpuvm_restore_process_bos - * unreserves KFD BOs, it is possible to evicted again. But - * restore has few more steps of finish. So lets wait for any - * previous restore work to complete - */ - flush_delayed_work(&p->restore_work); - pr_debug("Started evicting pasid 0x%x\n", p->pasid); - ret = kfd_process_evict_queues(p); + pr_debug("Started evicting process pid %d\n", p->lead_thread->pid); + ret = kfd_process_evict_queues(p, KFD_QUEUE_EVICTION_TRIGGER_TTM); if (!ret) { - dma_fence_signal(p->ef); - dma_fence_put(p->ef); - p->ef = NULL; - queue_delayed_work(kfd_restore_wq, &p->restore_work, - msecs_to_jiffies(PROCESS_RESTORE_TIME_MS)); + /* If another thread already signaled the eviction fence, + * they are responsible stopping the queues and scheduling + * the restore work. + */ + if (signal_eviction_fence(p) || + mod_delayed_work(kfd_restore_wq, &p->restore_work, + msecs_to_jiffies(PROCESS_RESTORE_TIME_MS))) + kfd_process_restore_queues(p); - pr_debug("Finished evicting pasid 0x%x\n", p->pasid); + pr_debug("Finished evicting process pid %d\n", p->lead_thread->pid); } else - pr_err("Failed to evict queues of pasid 0x%x\n", p->pasid); + pr_err("Failed to evict queues of process pid %d\n", p->lead_thread->pid); +} + +static int restore_process_helper(struct kfd_process *p) +{ + int ret = 0; + + /* VMs may not have been acquired yet during debugging. */ + if (p->kgd_process_info) { + ret = amdgpu_amdkfd_gpuvm_restore_process_bos( + p->kgd_process_info, &p->ef); + if (ret) + return ret; + } + + ret = kfd_process_restore_queues(p); + if (!ret) + pr_debug("Finished restoring process pid %d\n", + p->lead_thread->pid); + else + pr_err("Failed to restore queues of process pid %d\n", + p->lead_thread->pid); + + return ret; } static void restore_process_worker(struct work_struct *work) @@ -1230,7 +2069,7 @@ static void restore_process_worker(struct work_struct *work) * lifetime of this thread, kfd_process p will be valid */ p = container_of(dwork, struct kfd_process, restore_work); - pr_debug("Started restoring pasid 0x%x\n", p->pasid); + pr_debug("Started restoring process pasid %d\n", (int)p->lead_thread->pid); /* Setting last_restore_timestamp before successful restoration. * Otherwise this would have to be set by KGD (restore_process_bos) @@ -1243,22 +2082,15 @@ static void restore_process_worker(struct work_struct *work) */ p->last_restore_timestamp = get_jiffies_64(); - ret = amdgpu_amdkfd_gpuvm_restore_process_bos(p->kgd_process_info, - &p->ef); + + ret = restore_process_helper(p); if (ret) { - pr_debug("Failed to restore BOs of pasid 0x%x, retry after %d ms\n", - p->pasid, PROCESS_BACK_OFF_TIME_MS); - ret = queue_delayed_work(kfd_restore_wq, &p->restore_work, - msecs_to_jiffies(PROCESS_BACK_OFF_TIME_MS)); - WARN(!ret, "reschedule restore work failed\n"); - return; + pr_debug("Failed to restore BOs of process pid %d, retry after %d ms\n", + p->lead_thread->pid, PROCESS_BACK_OFF_TIME_MS); + if (mod_delayed_work(kfd_restore_wq, &p->restore_work, + msecs_to_jiffies(PROCESS_RESTORE_TIME_MS))) + kfd_process_restore_queues(p); } - - ret = kfd_process_restore_queues(p); - if (!ret) - pr_debug("Finished restoring pasid 0x%x\n", p->pasid); - else - pr_err("Failed to restore queues of pasid 0x%x\n", p->pasid); } void kfd_suspend_all_processes(void) @@ -1267,15 +2099,11 @@ void kfd_suspend_all_processes(void) unsigned int temp; int idx = srcu_read_lock(&kfd_processes_srcu); + WARN(debug_evictions, "Evicting all processes"); hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) { - cancel_delayed_work_sync(&p->eviction_work); - cancel_delayed_work_sync(&p->restore_work); - - if (kfd_process_evict_queues(p)) - pr_err("Failed to suspend process 0x%x\n", p->pasid); - dma_fence_signal(p->ef); - dma_fence_put(p->ef); - p->ef = NULL; + if (kfd_process_evict_queues(p, KFD_QUEUE_EVICTION_TRIGGER_SUSPEND)) + pr_err("Failed to suspend process pid %d\n", p->lead_thread->pid); + signal_eviction_fence(p); } srcu_read_unlock(&kfd_processes_srcu, idx); } @@ -1287,9 +2115,9 @@ int kfd_resume_all_processes(void) int ret = 0, idx = srcu_read_lock(&kfd_processes_srcu); hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) { - if (!queue_delayed_work(kfd_restore_wq, &p->restore_work, 0)) { - pr_err("Restore process %d failed during resume\n", - p->pasid); + if (restore_process_helper(p)) { + pr_err("Restore process pid %d failed during resume\n", + p->lead_thread->pid); ret = -EFAULT; } } @@ -1297,14 +2125,14 @@ int kfd_resume_all_processes(void) return ret; } -int kfd_reserved_mem_mmap(struct kfd_dev *dev, struct kfd_process *process, +int kfd_reserved_mem_mmap(struct kfd_node *dev, struct kfd_process *process, struct vm_area_struct *vma) { struct kfd_process_device *pdd; struct qcm_process_device *qpd; if ((vma->vm_end - vma->vm_start) != KFD_CWSR_TBA_TMA_SIZE) { - pr_err("Incorrect CWSR mapping size.\n"); + dev_err(dev->adev->dev, "Incorrect CWSR mapping size.\n"); return -EINVAL; } @@ -1316,33 +2144,173 @@ int kfd_reserved_mem_mmap(struct kfd_dev *dev, struct kfd_process *process, qpd->cwsr_kaddr = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(KFD_CWSR_TBA_TMA_SIZE)); if (!qpd->cwsr_kaddr) { - pr_err("Error allocating per process CWSR buffer.\n"); + dev_err(dev->adev->dev, + "Error allocating per process CWSR buffer.\n"); return -ENOMEM; } - vma->vm_flags |= VM_IO | VM_DONTCOPY | VM_DONTEXPAND - | VM_NORESERVE | VM_DONTDUMP | VM_PFNMAP; + vm_flags_set(vma, VM_IO | VM_DONTCOPY | VM_DONTEXPAND + | VM_NORESERVE | VM_DONTDUMP | VM_PFNMAP); /* Mapping pages to user process */ return remap_pfn_range(vma, vma->vm_start, PFN_DOWN(__pa(qpd->cwsr_kaddr)), KFD_CWSR_TBA_TMA_SIZE, vma->vm_page_prot); } -void kfd_flush_tlb(struct kfd_process_device *pdd) +/* assumes caller holds process lock. */ +int kfd_process_drain_interrupts(struct kfd_process_device *pdd) { - struct kfd_dev *dev = pdd->dev; + uint32_t irq_drain_fence[8]; + uint8_t node_id = 0; + int r = 0; - if (dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) { - /* Nothing to flush until a VMID is assigned, which - * only happens when the first queue is created. - */ - if (pdd->qpd.vmid) - amdgpu_amdkfd_flush_gpu_tlb_vmid(dev->kgd, - pdd->qpd.vmid); - } else { - amdgpu_amdkfd_flush_gpu_tlb_pasid(dev->kgd, - pdd->process->pasid); + if (!KFD_IS_SOC15(pdd->dev)) + return 0; + + pdd->process->irq_drain_is_open = true; + + memset(irq_drain_fence, 0, sizeof(irq_drain_fence)); + irq_drain_fence[0] = (KFD_IRQ_FENCE_SOURCEID << 8) | + KFD_IRQ_FENCE_CLIENTID; + irq_drain_fence[3] = pdd->pasid; + + /* + * For GFX 9.4.3/9.5.0, send the NodeId also in IH cookie DW[3] + */ + if (KFD_GC_VERSION(pdd->dev->kfd) == IP_VERSION(9, 4, 3) || + KFD_GC_VERSION(pdd->dev->kfd) == IP_VERSION(9, 4, 4) || + KFD_GC_VERSION(pdd->dev->kfd) == IP_VERSION(9, 5, 0)) { + node_id = ffs(pdd->dev->interrupt_bitmap) - 1; + irq_drain_fence[3] |= node_id << 16; } + + /* ensure stale irqs scheduled KFD interrupts and send drain fence. */ + if (amdgpu_amdkfd_send_close_event_drain_irq(pdd->dev->adev, + irq_drain_fence)) { + pdd->process->irq_drain_is_open = false; + return 0; + } + + r = wait_event_interruptible(pdd->process->wait_irq_drain, + !READ_ONCE(pdd->process->irq_drain_is_open)); + if (r) + pdd->process->irq_drain_is_open = false; + + return r; +} + +void kfd_process_close_interrupt_drain(unsigned int pasid) +{ + struct kfd_process *p; + + p = kfd_lookup_process_by_pasid(pasid, NULL); + + if (!p) + return; + + WRITE_ONCE(p->irq_drain_is_open, false); + wake_up_all(&p->wait_irq_drain); + kfd_unref_process(p); +} + +struct send_exception_work_handler_workarea { + struct work_struct work; + struct kfd_process *p; + unsigned int queue_id; + uint64_t error_reason; +}; + +static void send_exception_work_handler(struct work_struct *work) +{ + struct send_exception_work_handler_workarea *workarea; + struct kfd_process *p; + struct queue *q; + struct mm_struct *mm; + struct kfd_context_save_area_header __user *csa_header; + uint64_t __user *err_payload_ptr; + uint64_t cur_err; + uint32_t ev_id; + + workarea = container_of(work, + struct send_exception_work_handler_workarea, + work); + p = workarea->p; + + mm = get_task_mm(p->lead_thread); + + if (!mm) + return; + + kthread_use_mm(mm); + + q = pqm_get_user_queue(&p->pqm, workarea->queue_id); + + if (!q) + goto out; + + csa_header = (void __user *)q->properties.ctx_save_restore_area_address; + + get_user(err_payload_ptr, (uint64_t __user **)&csa_header->err_payload_addr); + get_user(cur_err, err_payload_ptr); + cur_err |= workarea->error_reason; + put_user(cur_err, err_payload_ptr); + get_user(ev_id, &csa_header->err_event_id); + + kfd_set_event(p, ev_id); + +out: + kthread_unuse_mm(mm); + mmput(mm); +} + +int kfd_send_exception_to_runtime(struct kfd_process *p, + unsigned int queue_id, + uint64_t error_reason) +{ + struct send_exception_work_handler_workarea worker; + + INIT_WORK_ONSTACK(&worker.work, send_exception_work_handler); + + worker.p = p; + worker.queue_id = queue_id; + worker.error_reason = error_reason; + + schedule_work(&worker.work); + flush_work(&worker.work); + destroy_work_on_stack(&worker.work); + + return 0; +} + +struct kfd_process_device *kfd_process_device_data_by_id(struct kfd_process *p, uint32_t gpu_id) +{ + int i; + + if (gpu_id) { + for (i = 0; i < p->n_pdds; i++) { + struct kfd_process_device *pdd = p->pdds[i]; + + if (pdd->user_gpu_id == gpu_id) + return pdd; + } + } + return NULL; +} + +int kfd_process_get_user_gpu_id(struct kfd_process *p, uint32_t actual_gpu_id) +{ + int i; + + if (!actual_gpu_id) + return 0; + + for (i = 0; i < p->n_pdds; i++) { + struct kfd_process_device *pdd = p->pdds[i]; + + if (pdd->dev->id == actual_gpu_id) + return pdd->user_gpu_id; + } + return -EINVAL; } #if defined(CONFIG_DEBUG_FS) @@ -1356,8 +2324,8 @@ int kfd_debugfs_mqds_by_process(struct seq_file *m, void *data) int idx = srcu_read_lock(&kfd_processes_srcu); hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) { - seq_printf(m, "Process %d PASID 0x%x:\n", - p->lead_thread->tgid, p->pasid); + seq_printf(m, "Process %d PASID %d:\n", + p->lead_thread->tgid, p->lead_thread->pid); mutex_lock(&p->mutex); r = pqm_debugfs_mqds(m, &p->pqm); @@ -1373,4 +2341,3 @@ int kfd_debugfs_mqds_by_process(struct seq_file *m, void *data) } #endif - |