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charset="utf-8" From: Rob Clark This submitqueue type isn't tied to a hw ringbuffer, but instead executes on the CPU for performing async VM_BIND ops. Signed-off-by: Rob Clark Signed-off-by: Rob Clark Tested-by: Antonino Maniscalco Reviewed-by: Antonino Maniscalco --- drivers/gpu/drm/msm/msm_gem.h | 12 +++++ drivers/gpu/drm/msm/msm_gem_submit.c | 60 +++++++++++++++++++--- drivers/gpu/drm/msm/msm_gem_vma.c | 71 +++++++++++++++++++++++++++ drivers/gpu/drm/msm/msm_gpu.h | 3 ++ drivers/gpu/drm/msm/msm_submitqueue.c | 67 +++++++++++++++++++------ include/uapi/drm/msm_drm.h | 9 +++- 6 files changed, 197 insertions(+), 25 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h index 3a5f81437b5d..af637409be39 100644 --- a/drivers/gpu/drm/msm/msm_gem.h +++ b/drivers/gpu/drm/msm/msm_gem.h @@ -53,6 +53,13 @@ struct msm_gem_vm { /** @base: Inherit from drm_gpuvm. */ struct drm_gpuvm base; =20 + /** + * @sched: Scheduler used for asynchronous VM_BIND request. + * + * Unused for kernel managed VMs (where all operations are synchronous). + */ + struct drm_gpu_scheduler sched; + /** * @mm: Memory management for kernel managed VA allocations * @@ -71,6 +78,9 @@ struct msm_gem_vm { */ struct pid *pid; =20 + /** @last_fence: Fence for last pending work scheduled on the VM */ + struct dma_fence *last_fence; + /** @faults: the number of GPU hangs associated with this address space */ int faults; =20 @@ -100,6 +110,8 @@ struct drm_gpuvm * msm_gem_vm_create(struct drm_device *drm, struct msm_mmu *mmu, const char = *name, u64 va_start, u64 va_size, bool managed); =20 +void msm_gem_vm_close(struct drm_gpuvm *gpuvm); + struct msm_fence_context; =20 #define MSM_VMA_DUMP (DRM_GPUVA_USERBITS << 0) diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm= _gem_submit.c index 9f18771a1e88..e2174b7d0e40 100644 --- a/drivers/gpu/drm/msm/msm_gem_submit.c +++ b/drivers/gpu/drm/msm/msm_gem_submit.c @@ -4,6 +4,7 @@ * Author: Rob Clark */ =20 +#include #include #include #include @@ -258,30 +259,43 @@ static int submit_lookup_cmds(struct msm_gem_submit *= submit, static int submit_lock_objects(struct msm_gem_submit *submit) { unsigned flags =3D DRM_EXEC_IGNORE_DUPLICATES | DRM_EXEC_INTERRUPTIBLE_WA= IT; + struct drm_exec *exec =3D &submit->exec; int ret; =20 -// TODO need to add vm_bind path which locks vm resv + external objs drm_exec_init(&submit->exec, flags, submit->nr_bos); =20 + if (msm_context_is_vmbind(submit->queue->ctx)) { + drm_exec_until_all_locked (&submit->exec) { + ret =3D drm_gpuvm_prepare_vm(submit->vm, exec, 1); + drm_exec_retry_on_contention(exec); + if (ret) + return ret; + + ret =3D drm_gpuvm_prepare_objects(submit->vm, exec, 1); + drm_exec_retry_on_contention(exec); + if (ret) + return ret; + } + + return 0; + } + drm_exec_until_all_locked (&submit->exec) { ret =3D drm_exec_lock_obj(&submit->exec, drm_gpuvm_resv_obj(submit->vm)); drm_exec_retry_on_contention(&submit->exec); if (ret) - goto error; + return ret; for (unsigned i =3D 0; i < submit->nr_bos; i++) { struct drm_gem_object *obj =3D submit->bos[i].obj; ret =3D drm_exec_prepare_obj(&submit->exec, obj, 1); drm_exec_retry_on_contention(&submit->exec); if (ret) - goto error; + return ret; } } =20 return 0; - -error: - return ret; } =20 static int submit_fence_sync(struct msm_gem_submit *submit) @@ -367,9 +381,18 @@ static void submit_unpin_objects(struct msm_gem_submit= *submit) =20 static void submit_attach_object_fences(struct msm_gem_submit *submit) { - int i; + struct msm_gem_vm *vm =3D to_msm_vm(submit->vm); + struct dma_fence *last_fence; + + if (msm_context_is_vmbind(submit->queue->ctx)) { + drm_gpuvm_resv_add_fence(submit->vm, &submit->exec, + submit->user_fence, + DMA_RESV_USAGE_BOOKKEEP, + DMA_RESV_USAGE_BOOKKEEP); + return; + } =20 - for (i =3D 0; i < submit->nr_bos; i++) { + for (unsigned i =3D 0; i < submit->nr_bos; i++) { struct drm_gem_object *obj =3D submit->bos[i].obj; =20 if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE) @@ -379,6 +402,10 @@ static void submit_attach_object_fences(struct msm_gem= _submit *submit) dma_resv_add_fence(obj->resv, submit->user_fence, DMA_RESV_USAGE_READ); } + + last_fence =3D vm->last_fence; + vm->last_fence =3D dma_fence_unwrap_merge(submit->user_fence, last_fence); + dma_fence_put(last_fence); } =20 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx, @@ -537,6 +564,11 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void = *data, if (!queue) return -ENOENT; =20 + if (queue->flags & MSM_SUBMITQUEUE_VM_BIND) { + ret =3D UERR(EINVAL, dev, "Invalid queue type"); + goto out_post_unlock; + } + ring =3D gpu->rb[queue->ring_nr]; =20 if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) { @@ -726,6 +758,18 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void = *data, =20 submit_attach_object_fences(submit); =20 + if (msm_context_is_vmbind(ctx)) { + /* + * If we are not using VM_BIND, submit_pin_vmas() will validate + * just the BOs attached to the submit. In that case we don't + * need to validate the _entire_ vm, because userspace tracked + * what BOs are associated with the submit. + */ + ret =3D drm_gpuvm_validate(submit->vm, &submit->exec); + if (ret) + goto out; + } + /* The scheduler owns a ref now: */ msm_gem_submit_get(submit); =20 diff --git a/drivers/gpu/drm/msm/msm_gem_vma.c b/drivers/gpu/drm/msm/msm_ge= m_vma.c index e16a8cafd8be..cf37abb98235 100644 --- a/drivers/gpu/drm/msm/msm_gem_vma.c +++ b/drivers/gpu/drm/msm/msm_gem_vma.c @@ -16,6 +16,7 @@ msm_gem_vm_free(struct drm_gpuvm *gpuvm) drm_mm_takedown(&vm->mm); if (vm->mmu) vm->mmu->funcs->destroy(vm->mmu); + dma_fence_put(vm->last_fence); put_pid(vm->pid); kfree(vm); } @@ -154,6 +155,9 @@ static const struct drm_gpuvm_ops msm_gpuvm_ops =3D { .vm_free =3D msm_gem_vm_free, }; =20 +static const struct drm_sched_backend_ops msm_vm_bind_ops =3D { +}; + /** * msm_gem_vm_create() - Create and initialize a &msm_gem_vm * @drm: the drm device @@ -195,6 +199,21 @@ msm_gem_vm_create(struct drm_device *drm, struct msm_m= mu *mmu, const char *name, goto err_free_vm; } =20 + if (!managed) { + struct drm_sched_init_args args =3D { + .ops =3D &msm_vm_bind_ops, + .num_rqs =3D 1, + .credit_limit =3D 1, + .timeout =3D MAX_SCHEDULE_TIMEOUT, + .name =3D "msm-vm-bind", + .dev =3D drm->dev, + }; + + ret =3D drm_sched_init(&vm->sched, &args); + if (ret) + goto err_free_dummy; + } + drm_gpuvm_init(&vm->base, name, flags, drm, dummy_gem, va_start, va_size, 0, 0, &msm_gpuvm_ops); drm_gem_object_put(dummy_gem); @@ -206,8 +225,60 @@ msm_gem_vm_create(struct drm_device *drm, struct msm_m= mu *mmu, const char *name, =20 return &vm->base; =20 +err_free_dummy: + drm_gem_object_put(dummy_gem); + err_free_vm: kfree(vm); return ERR_PTR(ret); =20 } + +/** + * msm_gem_vm_close() - Close a VM + * @gpuvm: The VM to close + * + * Called when the drm device file is closed, to tear down VM related reso= urces + * (which will drop refcounts to GEM objects that were still mapped into t= he + * VM at the time). + */ +void +msm_gem_vm_close(struct drm_gpuvm *gpuvm) +{ + struct msm_gem_vm *vm =3D to_msm_vm(gpuvm); + struct drm_gpuva *vma, *tmp; + + /* + * For kernel managed VMs, the VMAs are torn down when the handle is + * closed, so nothing more to do. + */ + if (vm->managed) + return; + + if (vm->last_fence) + dma_fence_wait(vm->last_fence, false); + + /* Kill the scheduler now, so we aren't racing with it for cleanup: */ + drm_sched_stop(&vm->sched, NULL); + drm_sched_fini(&vm->sched); + + /* Tear down any remaining mappings: */ + dma_resv_lock(drm_gpuvm_resv(gpuvm), NULL); + drm_gpuvm_for_each_va_safe (vma, tmp, gpuvm) { + struct drm_gem_object *obj =3D vma->gem.obj; + + if (obj && obj->resv !=3D drm_gpuvm_resv(gpuvm)) { + drm_gem_object_get(obj); + msm_gem_lock(obj); + } + + msm_gem_vma_unmap(vma); + msm_gem_vma_close(vma); + + if (obj && obj->resv !=3D drm_gpuvm_resv(gpuvm)) { + msm_gem_unlock(obj); + drm_gem_object_put(obj); + } + } + dma_resv_unlock(drm_gpuvm_resv(gpuvm)); +} diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index b38a33a67ee9..5705e8d4e6b9 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -564,6 +564,9 @@ struct msm_gpu_submitqueue { struct mutex lock; struct kref ref; struct drm_sched_entity *entity; + + /** @_vm_bind_entity: used for @entity pointer for VM_BIND queues */ + struct drm_sched_entity _vm_bind_entity[0]; }; =20 struct msm_gpu_state_bo { diff --git a/drivers/gpu/drm/msm/msm_submitqueue.c b/drivers/gpu/drm/msm/ms= m_submitqueue.c index 8ced49c7557b..8617a82cd6b3 100644 --- a/drivers/gpu/drm/msm/msm_submitqueue.c +++ b/drivers/gpu/drm/msm/msm_submitqueue.c @@ -72,6 +72,9 @@ void msm_submitqueue_destroy(struct kref *kref) =20 idr_destroy(&queue->fence_idr); =20 + if (queue->entity =3D=3D &queue->_vm_bind_entity[0]) + drm_sched_entity_destroy(queue->entity); + msm_context_put(queue->ctx); =20 kfree(queue); @@ -102,7 +105,7 @@ struct msm_gpu_submitqueue *msm_submitqueue_get(struct = msm_context *ctx, =20 void msm_submitqueue_close(struct msm_context *ctx) { - struct msm_gpu_submitqueue *entry, *tmp; + struct msm_gpu_submitqueue *queue, *tmp; =20 if (!ctx) return; @@ -111,10 +114,17 @@ void msm_submitqueue_close(struct msm_context *ctx) * No lock needed in close and there won't * be any more user ioctls coming our way */ - list_for_each_entry_safe(entry, tmp, &ctx->submitqueues, node) { - list_del(&entry->node); - msm_submitqueue_put(entry); + list_for_each_entry_safe(queue, tmp, &ctx->submitqueues, node) { + if (queue->entity =3D=3D &queue->_vm_bind_entity[0]) + drm_sched_entity_flush(queue->entity, MAX_WAIT_SCHED_ENTITY_Q_EMPTY); + list_del(&queue->node); + msm_submitqueue_put(queue); } + + if (!ctx->vm) + return; + + msm_gem_vm_close(ctx->vm); } =20 static struct drm_sched_entity * @@ -160,8 +170,6 @@ int msm_submitqueue_create(struct drm_device *drm, stru= ct msm_context *ctx, struct msm_drm_private *priv =3D drm->dev_private; struct msm_gpu_submitqueue *queue; enum drm_sched_priority sched_prio; - extern int enable_preemption; - bool preemption_supported; unsigned ring_nr; int ret; =20 @@ -171,26 +179,53 @@ int msm_submitqueue_create(struct drm_device *drm, st= ruct msm_context *ctx, if (!priv->gpu) return -ENODEV; =20 - preemption_supported =3D priv->gpu->nr_rings =3D=3D 1 && enable_preemptio= n !=3D 0; + if (flags & MSM_SUBMITQUEUE_VM_BIND) { + unsigned sz; =20 - if (flags & MSM_SUBMITQUEUE_ALLOW_PREEMPT && preemption_supported) - return -EINVAL; + /* Not allowed for kernel managed VMs (ie. kernel allocs VA) */ + if (!msm_context_is_vmbind(ctx)) + return -EINVAL; =20 - ret =3D msm_gpu_convert_priority(priv->gpu, prio, &ring_nr, &sched_prio); - if (ret) - return ret; + if (prio) + return -EINVAL; + + sz =3D struct_size(queue, _vm_bind_entity, 1); + queue =3D kzalloc(sz, GFP_KERNEL); + } else { + extern int enable_preemption; + bool preemption_supported =3D + priv->gpu->nr_rings =3D=3D 1 && enable_preemption !=3D 0; + + if (flags & MSM_SUBMITQUEUE_ALLOW_PREEMPT && preemption_supported) + return -EINVAL; =20 - queue =3D kzalloc(sizeof(*queue), GFP_KERNEL); + ret =3D msm_gpu_convert_priority(priv->gpu, prio, &ring_nr, &sched_prio); + if (ret) + return ret; + + queue =3D kzalloc(sizeof(*queue), GFP_KERNEL); + } =20 if (!queue) return -ENOMEM; =20 kref_init(&queue->ref); queue->flags =3D flags; - queue->ring_nr =3D ring_nr; =20 - queue->entity =3D get_sched_entity(ctx, priv->gpu->rb[ring_nr], - ring_nr, sched_prio); + if (flags & MSM_SUBMITQUEUE_VM_BIND) { + struct drm_gpu_scheduler *sched =3D &to_msm_vm(msm_context_vm(drm, ctx))= ->sched; + + queue->entity =3D &queue->_vm_bind_entity[0]; + + drm_sched_entity_init(queue->entity, DRM_SCHED_PRIORITY_KERNEL, + &sched, 1, NULL); + } else { + queue->ring_nr =3D ring_nr; + + queue->entity =3D get_sched_entity(ctx, priv->gpu->rb[ring_nr], + ring_nr, sched_prio); + } + if (IS_ERR(queue->entity)) { ret =3D PTR_ERR(queue->entity); kfree(queue); diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h index 2c2fc4b284d0..6d6cd1219926 100644 --- a/include/uapi/drm/msm_drm.h +++ b/include/uapi/drm/msm_drm.h @@ -385,12 +385,19 @@ struct drm_msm_gem_madvise { /* * Draw queues allow the user to set specific submission parameter. Command * submissions specify a specific submitqueue to use. ID 0 is reserved for - * backwards compatibility as a "default" submitqueue + * backwards compatibility as a "default" submitqueue. + * + * Because VM_BIND async updates happen on the CPU, they must run on a + * virtual queue created with the flag MSM_SUBMITQUEUE_VM_BIND. If we had + * a way to do pgtable updates on the GPU, we could drop this restriction. */ =20 #define MSM_SUBMITQUEUE_ALLOW_PREEMPT 0x00000001 +#define MSM_SUBMITQUEUE_VM_BIND 0x00000002 /* virtual queue for VM_BIND o= ps */ + #define MSM_SUBMITQUEUE_FLAGS ( \ MSM_SUBMITQUEUE_ALLOW_PREEMPT | \ + MSM_SUBMITQUEUE_VM_BIND | \ 0) =20 /* --=20 2.50.0