From 52b29d73340da6cbb10ba42b0a28e7fb795afe9c Mon Sep 17 00:00:00 2001 From: Felix Kuehling Date: Thu, 15 Mar 2018 17:27:48 -0400 Subject: [PATCH] drm/amdkfd: Add per-process IDR for buffer handles MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Also used for cleaning up on process termination. v2: Refactored cleanup on process termination Signed-off-by: Felix Kuehling Acked-by: Christian König Signed-off-by: Oded Gabbay --- drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 11 +++++ drivers/gpu/drm/amd/amdkfd/kfd_process.c | 73 ++++++++++++++++++++++++++++++++ 2 files changed, 84 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index 0d5d924..b2b5ef8 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -543,6 +543,9 @@ struct kfd_process_device { struct file *drm_file; void *vm; + /* GPUVM allocations storage */ + struct idr alloc_idr; + /* Flag used to tell the pdd has dequeued from the dqm. * This is used to prevent dev->dqm->ops.process_termination() from * being called twice when it is already called in IOMMU callback @@ -678,6 +681,14 @@ struct kfd_process_device *kfd_create_process_device_data(struct kfd_dev *dev, int kfd_reserved_mem_mmap(struct kfd_process *process, struct vm_area_struct *vma); +/* KFD process API for creating and translating handles */ +int kfd_process_device_create_obj_handle(struct kfd_process_device *pdd, + void *mem); +void *kfd_process_device_translate_handle(struct kfd_process_device *p, + int handle); +void kfd_process_device_remove_obj_handle(struct kfd_process_device *pdd, + int handle); + /* Process device data iterator */ struct kfd_process_device *kfd_get_first_process_device_data( struct kfd_process *p); diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 6618aaa..a2ae023 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -150,6 +150,40 @@ void kfd_unref_process(struct kfd_process *p) kref_put(&p->ref, kfd_process_ref_release); } +static void kfd_process_device_free_bos(struct kfd_process_device *pdd) +{ + struct kfd_process *p = pdd->process; + void *mem; + int id; + + /* + * 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) + continue; + peer_pdd->dev->kfd2kgd->unmap_memory_to_gpu( + peer_pdd->dev->kgd, mem, peer_pdd->vm); + } + + pdd->dev->kfd2kgd->free_memory_of_gpu(pdd->dev->kgd, mem); + kfd_process_device_remove_obj_handle(pdd, id); + } +} + +static void kfd_process_free_outstanding_kfd_bos(struct kfd_process *p) +{ + struct kfd_process_device *pdd; + + list_for_each_entry(pdd, &p->per_device_data, per_device_list) + kfd_process_device_free_bos(pdd); +} + static void kfd_process_destroy_pdds(struct kfd_process *p) { struct kfd_process_device *pdd, *temp; @@ -171,6 +205,8 @@ static void kfd_process_destroy_pdds(struct kfd_process *p) free_pages((unsigned long)pdd->qpd.cwsr_kaddr, get_order(KFD_CWSR_TBA_TMA_SIZE)); + idr_destroy(&pdd->alloc_idr); + kfree(pdd); } } @@ -187,6 +223,8 @@ static void kfd_process_wq_release(struct work_struct *work) kfd_iommu_unbind_process(p); + kfd_process_free_outstanding_kfd_bos(p); + kfd_process_destroy_pdds(p); dma_fence_put(p->ef); @@ -371,6 +409,7 @@ static struct kfd_process *create_process(const struct task_struct *thread, return process; err_init_cwsr: + kfd_process_free_outstanding_kfd_bos(process); kfd_process_destroy_pdds(process); err_init_apertures: pqm_uninit(&process->pqm); @@ -421,6 +460,9 @@ struct kfd_process_device *kfd_create_process_device_data(struct kfd_dev *dev, pdd->already_dequeued = false; list_add(&pdd->per_device_list, &p->per_device_data); + /* Init idr used for memory handle translation */ + idr_init(&pdd->alloc_idr); + return pdd; } @@ -520,6 +562,37 @@ 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 + * Assumes that the process lock is held. + */ +int kfd_process_device_create_obj_handle(struct kfd_process_device *pdd, + void *mem) +{ + return idr_alloc(&pdd->alloc_idr, mem, 0, 0, GFP_KERNEL); +} + +/* Translate specific handle from process local memory idr + * Assumes that the process lock is held. + */ +void *kfd_process_device_translate_handle(struct kfd_process_device *pdd, + int handle) +{ + if (handle < 0) + return NULL; + + return idr_find(&pdd->alloc_idr, handle); +} + +/* Remove specific handle from process local memory idr + * Assumes that the process lock is held. + */ +void kfd_process_device_remove_obj_handle(struct kfd_process_device *pdd, + int handle) +{ + if (handle >= 0) + idr_remove(&pdd->alloc_idr, handle); +} + /* This increments the process->ref counter. */ struct kfd_process *kfd_lookup_process_by_pasid(unsigned int pasid) { -- 2.7.4