Fixed MTP to work with TWRP

drivers/gpu/drm/nouveau/nouveau_gem.c

@@ -0,0 +1,898 @@
+/*
+ * Copyright (C) 2008 Ben Skeggs.
+ * All Rights Reserved.
+ *
+ * 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 (including the
+ * next paragraph) 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 OWNER(S) AND/OR ITS SUPPLIERS 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.
+ *
+ */
+
+#include "nouveau_drm.h"
+#include "nouveau_dma.h"
+#include "nouveau_fence.h"
+#include "nouveau_abi16.h"
+
+#include "nouveau_ttm.h"
+#include "nouveau_gem.h"
+
+void
+nouveau_gem_object_del(struct drm_gem_object *gem)
+{
+	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
+	struct ttm_buffer_object *bo = &nvbo->bo;
+
+	if (gem->import_attach)
+		drm_prime_gem_destroy(gem, nvbo->bo.sg);
+
+	drm_gem_object_release(gem);
+
+	/* reset filp so nouveau_bo_del_ttm() can test for it */
+	gem->filp = NULL;
+	ttm_bo_unref(&bo);
+}
+
+int
+nouveau_gem_object_open(struct drm_gem_object *gem, struct drm_file *file_priv)
+{
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
+	struct nouveau_vma *vma;
+	int ret;
+
+	if (!cli->vm)
+		return 0;
+
+	ret = ttm_bo_reserve(&nvbo->bo, false, false, false, NULL);
+	if (ret)
+		return ret;
+
+	vma = nouveau_bo_vma_find(nvbo, cli->vm);
+	if (!vma) {
+		vma = kzalloc(sizeof(*vma), GFP_KERNEL);
+		if (!vma) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
+		ret = nouveau_bo_vma_add(nvbo, cli->vm, vma);
+		if (ret) {
+			kfree(vma);
+			goto out;
+		}
+	} else {
+		vma->refcount++;
+	}
+
+out:
+	ttm_bo_unreserve(&nvbo->bo);
+	return ret;
+}
+
+static void
+nouveau_gem_object_delete(void *data)
+{
+	struct nouveau_vma *vma = data;
+	nouveau_vm_unmap(vma);
+	nouveau_vm_put(vma);
+	kfree(vma);
+}
+
+static void
+nouveau_gem_object_unmap(struct nouveau_bo *nvbo, struct nouveau_vma *vma)
+{
+	const bool mapped = nvbo->bo.mem.mem_type != TTM_PL_SYSTEM;
+	struct reservation_object *resv = nvbo->bo.resv;
+	struct reservation_object_list *fobj;
+	struct fence *fence = NULL;
+
+	fobj = reservation_object_get_list(resv);
+
+	list_del(&vma->head);
+
+	if (fobj && fobj->shared_count > 1)
+		ttm_bo_wait(&nvbo->bo, true, false, false);
+	else if (fobj && fobj->shared_count == 1)
+		fence = rcu_dereference_protected(fobj->shared[0],
+						reservation_object_held(resv));
+	else
+		fence = reservation_object_get_excl(nvbo->bo.resv);
+
+	if (fence && mapped) {
+		nouveau_fence_work(fence, nouveau_gem_object_delete, vma);
+	} else {
+		if (mapped)
+			nouveau_vm_unmap(vma);
+		nouveau_vm_put(vma);
+		kfree(vma);
+	}
+}
+
+void
+nouveau_gem_object_close(struct drm_gem_object *gem, struct drm_file *file_priv)
+{
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
+	struct nouveau_vma *vma;
+	int ret;
+
+	if (!cli->vm)
+		return;
+
+	ret = ttm_bo_reserve(&nvbo->bo, false, false, false, NULL);
+	if (ret)
+		return;
+
+	vma = nouveau_bo_vma_find(nvbo, cli->vm);
+	if (vma) {
+		if (--vma->refcount == 0)
+			nouveau_gem_object_unmap(nvbo, vma);
+	}
+	ttm_bo_unreserve(&nvbo->bo);
+}
+
+int
+nouveau_gem_new(struct drm_device *dev, int size, int align, uint32_t domain,
+		uint32_t tile_mode, uint32_t tile_flags,
+		struct nouveau_bo **pnvbo)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_bo *nvbo;
+	u32 flags = 0;
+	int ret;
+
+	if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
+		flags |= TTM_PL_FLAG_VRAM;
+	if (domain & NOUVEAU_GEM_DOMAIN_GART)
+		flags |= TTM_PL_FLAG_TT;
+	if (!flags || domain & NOUVEAU_GEM_DOMAIN_CPU)
+		flags |= TTM_PL_FLAG_SYSTEM;
+
+	ret = nouveau_bo_new(dev, size, align, flags, tile_mode,
+			     tile_flags, NULL, NULL, pnvbo);
+	if (ret)
+		return ret;
+	nvbo = *pnvbo;
+
+	/* we restrict allowed domains on nv50+ to only the types
+	 * that were requested at creation time.  not possibly on
+	 * earlier chips without busting the ABI.
+	 */
+	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_VRAM |
+			      NOUVEAU_GEM_DOMAIN_GART;
+	if (drm->device.info.family >= NV_DEVICE_INFO_V0_TESLA)
+		nvbo->valid_domains &= domain;
+
+	/* Initialize the embedded gem-object. We return a single gem-reference
+	 * to the caller, instead of a normal nouveau_bo ttm reference. */
+	ret = drm_gem_object_init(dev, &nvbo->gem, nvbo->bo.mem.size);
+	if (ret) {
+		nouveau_bo_ref(NULL, pnvbo);
+		return -ENOMEM;
+	}
+
+	nvbo->bo.persistent_swap_storage = nvbo->gem.filp;
+	return 0;
+}
+
+static int
+nouveau_gem_info(struct drm_file *file_priv, struct drm_gem_object *gem,
+		 struct drm_nouveau_gem_info *rep)
+{
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
+	struct nouveau_vma *vma;
+
+	if (nvbo->bo.mem.mem_type == TTM_PL_TT)
+		rep->domain = NOUVEAU_GEM_DOMAIN_GART;
+	else
+		rep->domain = NOUVEAU_GEM_DOMAIN_VRAM;
+
+	rep->offset = nvbo->bo.offset;
+	if (cli->vm) {
+		vma = nouveau_bo_vma_find(nvbo, cli->vm);
+		if (!vma)
+			return -EINVAL;
+
+		rep->offset = vma->offset;
+	}
+
+	rep->size = nvbo->bo.mem.num_pages << PAGE_SHIFT;
+	rep->map_handle = drm_vma_node_offset_addr(&nvbo->bo.vma_node);
+	rep->tile_mode = nvbo->tile_mode;
+	rep->tile_flags = nvbo->tile_flags;
+	return 0;
+}
+
+int
+nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
+		      struct drm_file *file_priv)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	struct nouveau_fb *pfb = nvkm_fb(&drm->device);
+	struct drm_nouveau_gem_new *req = data;
+	struct nouveau_bo *nvbo = NULL;
+	int ret = 0;
+
+	if (!pfb->memtype_valid(pfb, req->info.tile_flags)) {
+		NV_PRINTK(error, cli, "bad page flags: 0x%08x\n", req->info.tile_flags);
+		return -EINVAL;
+	}
+
+	ret = nouveau_gem_new(dev, req->info.size, req->align,
+			      req->info.domain, req->info.tile_mode,
+			      req->info.tile_flags, &nvbo);
+	if (ret)
+		return ret;
+
+	ret = drm_gem_handle_create(file_priv, &nvbo->gem, &req->info.handle);
+	if (ret == 0) {
+		ret = nouveau_gem_info(file_priv, &nvbo->gem, &req->info);
+		if (ret)
+			drm_gem_handle_delete(file_priv, req->info.handle);
+	}
+
+	/* drop reference from allocate - handle holds it now */
+	drm_gem_object_unreference_unlocked(&nvbo->gem);
+	return ret;
+}
+
+static int
+nouveau_gem_set_domain(struct drm_gem_object *gem, uint32_t read_domains,
+		       uint32_t write_domains, uint32_t valid_domains)
+{
+	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
+	struct ttm_buffer_object *bo = &nvbo->bo;
+	uint32_t domains = valid_domains & nvbo->valid_domains &
+		(write_domains ? write_domains : read_domains);
+	uint32_t pref_flags = 0, valid_flags = 0;
+
+	if (!domains)
+		return -EINVAL;
+
+	if (valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
+		valid_flags |= TTM_PL_FLAG_VRAM;
+
+	if (valid_domains & NOUVEAU_GEM_DOMAIN_GART)
+		valid_flags |= TTM_PL_FLAG_TT;
+
+	if ((domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
+	    bo->mem.mem_type == TTM_PL_VRAM)
+		pref_flags |= TTM_PL_FLAG_VRAM;
+
+	else if ((domains & NOUVEAU_GEM_DOMAIN_GART) &&
+		 bo->mem.mem_type == TTM_PL_TT)
+		pref_flags |= TTM_PL_FLAG_TT;
+
+	else if (domains & NOUVEAU_GEM_DOMAIN_VRAM)
+		pref_flags |= TTM_PL_FLAG_VRAM;
+
+	else
+		pref_flags |= TTM_PL_FLAG_TT;
+
+	nouveau_bo_placement_set(nvbo, pref_flags, valid_flags);
+
+	return 0;
+}
+
+struct validate_op {
+	struct list_head list;
+	struct ww_acquire_ctx ticket;
+};
+
+static void
+validate_fini_no_ticket(struct validate_op *op, struct nouveau_fence *fence,
+			struct drm_nouveau_gem_pushbuf_bo *pbbo)
+{
+	struct nouveau_bo *nvbo;
+	struct drm_nouveau_gem_pushbuf_bo *b;
+
+	while (!list_empty(&op->list)) {
+		nvbo = list_entry(op->list.next, struct nouveau_bo, entry);
+		b = &pbbo[nvbo->pbbo_index];
+
+		if (likely(fence))
+			nouveau_bo_fence(nvbo, fence, !!b->write_domains);
+
+		if (unlikely(nvbo->validate_mapped)) {
+			ttm_bo_kunmap(&nvbo->kmap);
+			nvbo->validate_mapped = false;
+		}
+
+		list_del(&nvbo->entry);
+		nvbo->reserved_by = NULL;
+		ttm_bo_unreserve_ticket(&nvbo->bo, &op->ticket);
+		drm_gem_object_unreference_unlocked(&nvbo->gem);
+	}
+}
+
+static void
+validate_fini(struct validate_op *op, struct nouveau_fence *fence,
+	      struct drm_nouveau_gem_pushbuf_bo *pbbo)
+{
+	validate_fini_no_ticket(op, fence, pbbo);
+	ww_acquire_fini(&op->ticket);
+}
+
+static int
+validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
+	      struct drm_nouveau_gem_pushbuf_bo *pbbo,
+	      int nr_buffers, struct validate_op *op)
+{
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	struct drm_device *dev = chan->drm->dev;
+	int trycnt = 0;
+	int ret, i;
+	struct nouveau_bo *res_bo = NULL;
+	LIST_HEAD(gart_list);
+	LIST_HEAD(vram_list);
+	LIST_HEAD(both_list);
+
+	ww_acquire_init(&op->ticket, &reservation_ww_class);
+retry:
+	if (++trycnt > 100000) {
+		NV_PRINTK(error, cli, "%s failed and gave up.\n", __func__);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < nr_buffers; i++) {
+		struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
+		struct drm_gem_object *gem;
+		struct nouveau_bo *nvbo;
+
+		gem = drm_gem_object_lookup(dev, file_priv, b->handle);
+		if (!gem) {
+			NV_PRINTK(error, cli, "Unknown handle 0x%08x\n", b->handle);
+			ret = -ENOENT;
+			break;
+		}
+		nvbo = nouveau_gem_object(gem);
+		if (nvbo == res_bo) {
+			res_bo = NULL;
+			drm_gem_object_unreference_unlocked(gem);
+			continue;
+		}
+
+		if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
+			NV_PRINTK(error, cli, "multiple instances of buffer %d on "
+				      "validation list\n", b->handle);
+			drm_gem_object_unreference_unlocked(gem);
+			ret = -EINVAL;
+			break;
+		}
+
+		ret = ttm_bo_reserve(&nvbo->bo, true, false, true, &op->ticket);
+		if (ret) {
+			list_splice_tail_init(&vram_list, &op->list);
+			list_splice_tail_init(&gart_list, &op->list);
+			list_splice_tail_init(&both_list, &op->list);
+			validate_fini_no_ticket(op, NULL, NULL);
+			if (unlikely(ret == -EDEADLK)) {
+				ret = ttm_bo_reserve_slowpath(&nvbo->bo, true,
+							      &op->ticket);
+				if (!ret)
+					res_bo = nvbo;
+			}
+			if (unlikely(ret)) {
+				if (ret != -ERESTARTSYS)
+					NV_PRINTK(error, cli, "fail reserve\n");
+				break;
+			}
+		}
+
+		b->user_priv = (uint64_t)(unsigned long)nvbo;
+		nvbo->reserved_by = file_priv;
+		nvbo->pbbo_index = i;
+		if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
+		    (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
+			list_add_tail(&nvbo->entry, &both_list);
+		else
+		if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
+			list_add_tail(&nvbo->entry, &vram_list);
+		else
+		if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
+			list_add_tail(&nvbo->entry, &gart_list);
+		else {
+			NV_PRINTK(error, cli, "invalid valid domains: 0x%08x\n",
+				 b->valid_domains);
+			list_add_tail(&nvbo->entry, &both_list);
+			ret = -EINVAL;
+			break;
+		}
+		if (nvbo == res_bo)
+			goto retry;
+	}
+
+	ww_acquire_done(&op->ticket);
+	list_splice_tail(&vram_list, &op->list);
+	list_splice_tail(&gart_list, &op->list);
+	list_splice_tail(&both_list, &op->list);
+	if (ret)
+		validate_fini(op, NULL, NULL);
+	return ret;
+
+}
+
+static int
+validate_list(struct nouveau_channel *chan, struct nouveau_cli *cli,
+	      struct list_head *list, struct drm_nouveau_gem_pushbuf_bo *pbbo,
+	      uint64_t user_pbbo_ptr)
+{
+	struct nouveau_drm *drm = chan->drm;
+	struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
+				(void __force __user *)(uintptr_t)user_pbbo_ptr;
+	struct nouveau_bo *nvbo;
+	int ret, relocs = 0;
+
+	list_for_each_entry(nvbo, list, entry) {
+		struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
+
+		ret = nouveau_gem_set_domain(&nvbo->gem, b->read_domains,
+					     b->write_domains,
+					     b->valid_domains);
+		if (unlikely(ret)) {
+			NV_PRINTK(error, cli, "fail set_domain\n");
+			return ret;
+		}
+
+		ret = nouveau_bo_validate(nvbo, true, false);
+		if (unlikely(ret)) {
+			if (ret != -ERESTARTSYS)
+				NV_PRINTK(error, cli, "fail ttm_validate\n");
+			return ret;
+		}
+
+		ret = nouveau_fence_sync(nvbo, chan, !!b->write_domains, true);
+		if (unlikely(ret)) {
+			if (ret != -ERESTARTSYS)
+				NV_PRINTK(error, cli, "fail post-validate sync\n");
+			return ret;
+		}
+
+		if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA) {
+			if (nvbo->bo.offset == b->presumed.offset &&
+			    ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
+			      b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
+			     (nvbo->bo.mem.mem_type == TTM_PL_TT &&
+			      b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
+				continue;
+
+			if (nvbo->bo.mem.mem_type == TTM_PL_TT)
+				b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
+			else
+				b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
+			b->presumed.offset = nvbo->bo.offset;
+			b->presumed.valid = 0;
+			relocs++;
+
+			if (copy_to_user(&upbbo[nvbo->pbbo_index].presumed,
+					     &b->presumed, sizeof(b->presumed)))
+				return -EFAULT;
+		}
+	}
+
+	return relocs;
+}
+
+static int
+nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
+			     struct drm_file *file_priv,
+			     struct drm_nouveau_gem_pushbuf_bo *pbbo,
+			     uint64_t user_buffers, int nr_buffers,
+			     struct validate_op *op, int *apply_relocs)
+{
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	int ret;
+
+	INIT_LIST_HEAD(&op->list);
+
+	if (nr_buffers == 0)
+		return 0;
+
+	ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
+	if (unlikely(ret)) {
+		if (ret != -ERESTARTSYS)
+			NV_PRINTK(error, cli, "validate_init\n");
+		return ret;
+	}
+
+	ret = validate_list(chan, cli, &op->list, pbbo, user_buffers);
+	if (unlikely(ret < 0)) {
+		if (ret != -ERESTARTSYS)
+			NV_PRINTK(error, cli, "validating bo list\n");
+		validate_fini(op, NULL, NULL);
+		return ret;
+	}
+	*apply_relocs = ret;
+	return 0;
+}
+
+static inline void
+u_free(void *addr)
+{
+	if (!is_vmalloc_addr(addr))
+		kfree(addr);
+	else
+		vfree(addr);
+}
+
+static inline void *
+u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
+{
+	void *mem;
+	void __user *userptr = (void __force __user *)(uintptr_t)user;
+
+	size *= nmemb;
+
+	mem = kmalloc(size, GFP_KERNEL | __GFP_NOWARN);
+	if (!mem)
+		mem = vmalloc(size);
+	if (!mem)
+		return ERR_PTR(-ENOMEM);
+
+	if (copy_from_user(mem, userptr, size)) {
+		u_free(mem);
+		return ERR_PTR(-EFAULT);
+	}
+
+	return mem;
+}
+
+static int
+nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli,
+				struct drm_nouveau_gem_pushbuf *req,
+				struct drm_nouveau_gem_pushbuf_bo *bo)
+{
+	struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
+	int ret = 0;
+	unsigned i;
+
+	reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
+	if (IS_ERR(reloc))
+		return PTR_ERR(reloc);
+
+	for (i = 0; i < req->nr_relocs; i++) {
+		struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
+		struct drm_nouveau_gem_pushbuf_bo *b;
+		struct nouveau_bo *nvbo;
+		uint32_t data;
+
+		if (unlikely(r->bo_index > req->nr_buffers)) {
+			NV_PRINTK(error, cli, "reloc bo index invalid\n");
+			ret = -EINVAL;
+			break;
+		}
+
+		b = &bo[r->bo_index];
+		if (b->presumed.valid)
+			continue;
+
+		if (unlikely(r->reloc_bo_index > req->nr_buffers)) {
+			NV_PRINTK(error, cli, "reloc container bo index invalid\n");
+			ret = -EINVAL;
+			break;
+		}
+		nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
+
+		if (unlikely(r->reloc_bo_offset + 4 >
+			     nvbo->bo.mem.num_pages << PAGE_SHIFT)) {
+			NV_PRINTK(error, cli, "reloc outside of bo\n");
+			ret = -EINVAL;
+			break;
+		}
+
+		if (!nvbo->kmap.virtual) {
+			ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.mem.num_pages,
+					  &nvbo->kmap);
+			if (ret) {
+				NV_PRINTK(error, cli, "failed kmap for reloc\n");
+				break;
+			}
+			nvbo->validate_mapped = true;
+		}
+
+		if (r->flags & NOUVEAU_GEM_RELOC_LOW)
+			data = b->presumed.offset + r->data;
+		else
+		if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
+			data = (b->presumed.offset + r->data) >> 32;
+		else
+			data = r->data;
+
+		if (r->flags & NOUVEAU_GEM_RELOC_OR) {
+			if (b->presumed.domain == NOUVEAU_GEM_DOMAIN_GART)
+				data |= r->tor;
+			else
+				data |= r->vor;
+		}
+
+		ret = ttm_bo_wait(&nvbo->bo, true, false, false);
+		if (ret) {
+			NV_PRINTK(error, cli, "reloc wait_idle failed: %d\n", ret);
+			break;
+		}
+
+		nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
+	}
+
+	u_free(reloc);
+	return ret;
+}
+
+int
+nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
+			  struct drm_file *file_priv)
+{
+	struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	struct nouveau_abi16_chan *temp;
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct drm_nouveau_gem_pushbuf *req = data;
+	struct drm_nouveau_gem_pushbuf_push *push;
+	struct drm_nouveau_gem_pushbuf_bo *bo;
+	struct nouveau_channel *chan = NULL;
+	struct validate_op op;
+	struct nouveau_fence *fence = NULL;
+	int i, j, ret = 0, do_reloc = 0;
+
+	if (unlikely(!abi16))
+		return -ENOMEM;
+
+	list_for_each_entry(temp, &abi16->channels, head) {
+		if (temp->chan->object->handle == (NVDRM_CHAN | req->channel)) {
+			chan = temp->chan;
+			break;
+		}
+	}
+
+	if (!chan)
+		return nouveau_abi16_put(abi16, -ENOENT);
+
+	req->vram_available = drm->gem.vram_available;
+	req->gart_available = drm->gem.gart_available;
+	if (unlikely(req->nr_push == 0))
+		goto out_next;
+
+	if (unlikely(req->nr_push > NOUVEAU_GEM_MAX_PUSH)) {
+		NV_PRINTK(error, cli, "pushbuf push count exceeds limit: %d max %d\n",
+			 req->nr_push, NOUVEAU_GEM_MAX_PUSH);
+		return nouveau_abi16_put(abi16, -EINVAL);
+	}
+
+	if (unlikely(req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS)) {
+		NV_PRINTK(error, cli, "pushbuf bo count exceeds limit: %d max %d\n",
+			 req->nr_buffers, NOUVEAU_GEM_MAX_BUFFERS);
+		return nouveau_abi16_put(abi16, -EINVAL);
+	}
+
+	if (unlikely(req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS)) {
+		NV_PRINTK(error, cli, "pushbuf reloc count exceeds limit: %d max %d\n",
+			 req->nr_relocs, NOUVEAU_GEM_MAX_RELOCS);
+		return nouveau_abi16_put(abi16, -EINVAL);
+	}
+
+	push = u_memcpya(req->push, req->nr_push, sizeof(*push));
+	if (IS_ERR(push))
+		return nouveau_abi16_put(abi16, PTR_ERR(push));
+
+	bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
+	if (IS_ERR(bo)) {
+		u_free(push);
+		return nouveau_abi16_put(abi16, PTR_ERR(bo));
+	}
+
+	/* Ensure all push buffers are on validate list */
+	for (i = 0; i < req->nr_push; i++) {
+		if (push[i].bo_index >= req->nr_buffers) {
+			NV_PRINTK(error, cli, "push %d buffer not in list\n", i);
+			ret = -EINVAL;
+			goto out_prevalid;
+		}
+	}
+
+	/* Validate buffer list */
+	ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
+					   req->nr_buffers, &op, &do_reloc);
+	if (ret) {
+		if (ret != -ERESTARTSYS)
+			NV_PRINTK(error, cli, "validate: %d\n", ret);
+		goto out_prevalid;
+	}
+
+	/* Apply any relocations that are required */
+	if (do_reloc) {
+		ret = nouveau_gem_pushbuf_reloc_apply(cli, req, bo);
+		if (ret) {
+			NV_PRINTK(error, cli, "reloc apply: %d\n", ret);
+			goto out;
+		}
+	}
+
+	if (chan->dma.ib_max) {
+		ret = nouveau_dma_wait(chan, req->nr_push + 1, 16);
+		if (ret) {
+			NV_PRINTK(error, cli, "nv50cal_space: %d\n", ret);
+			goto out;
+		}
+
+		for (i = 0; i < req->nr_push; i++) {
+			struct nouveau_bo *nvbo = (void *)(unsigned long)
+				bo[push[i].bo_index].user_priv;
+
+			nv50_dma_push(chan, nvbo, push[i].offset,
+				      push[i].length);
+		}
+	} else
+	if (drm->device.info.chipset >= 0x25) {
+		ret = RING_SPACE(chan, req->nr_push * 2);
+		if (ret) {
+			NV_PRINTK(error, cli, "cal_space: %d\n", ret);
+			goto out;
+		}
+
+		for (i = 0; i < req->nr_push; i++) {
+			struct nouveau_bo *nvbo = (void *)(unsigned long)
+				bo[push[i].bo_index].user_priv;
+
+			OUT_RING(chan, (nvbo->bo.offset + push[i].offset) | 2);
+			OUT_RING(chan, 0);
+		}
+	} else {
+		ret = RING_SPACE(chan, req->nr_push * (2 + NOUVEAU_DMA_SKIPS));
+		if (ret) {
+			NV_PRINTK(error, cli, "jmp_space: %d\n", ret);
+			goto out;
+		}
+
+		for (i = 0; i < req->nr_push; i++) {
+			struct nouveau_bo *nvbo = (void *)(unsigned long)
+				bo[push[i].bo_index].user_priv;
+			uint32_t cmd;
+
+			cmd = chan->push.vma.offset + ((chan->dma.cur + 2) << 2);
+			cmd |= 0x20000000;
+			if (unlikely(cmd != req->suffix0)) {
+				if (!nvbo->kmap.virtual) {
+					ret = ttm_bo_kmap(&nvbo->bo, 0,
+							  nvbo->bo.mem.
+							  num_pages,
+							  &nvbo->kmap);
+					if (ret) {
+						WIND_RING(chan);
+						goto out;
+					}
+					nvbo->validate_mapped = true;
+				}
+
+				nouveau_bo_wr32(nvbo, (push[i].offset +
+						push[i].length - 8) / 4, cmd);
+			}
+
+			OUT_RING(chan, 0x20000000 |
+				      (nvbo->bo.offset + push[i].offset));
+			OUT_RING(chan, 0);
+			for (j = 0; j < NOUVEAU_DMA_SKIPS; j++)
+				OUT_RING(chan, 0);
+		}
+	}
+
+	ret = nouveau_fence_new(chan, false, &fence);
+	if (ret) {
+		NV_PRINTK(error, cli, "error fencing pushbuf: %d\n", ret);
+		WIND_RING(chan);
+		goto out;
+	}
+
+out:
+	validate_fini(&op, fence, bo);
+	nouveau_fence_unref(&fence);
+
+out_prevalid:
+	u_free(bo);
+	u_free(push);
+
+out_next:
+	if (chan->dma.ib_max) {
+		req->suffix0 = 0x00000000;
+		req->suffix1 = 0x00000000;
+	} else
+	if (drm->device.info.chipset >= 0x25) {
+		req->suffix0 = 0x00020000;
+		req->suffix1 = 0x00000000;
+	} else {
+		req->suffix0 = 0x20000000 |
+			      (chan->push.vma.offset + ((chan->dma.cur + 2) << 2));
+		req->suffix1 = 0x00000000;
+	}
+
+	return nouveau_abi16_put(abi16, ret);
+}
+
+static inline uint32_t
+domain_to_ttm(struct nouveau_bo *nvbo, uint32_t domain)
+{
+	uint32_t flags = 0;
+
+	if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
+		flags |= TTM_PL_FLAG_VRAM;
+	if (domain & NOUVEAU_GEM_DOMAIN_GART)
+		flags |= TTM_PL_FLAG_TT;
+
+	return flags;
+}
+
+int
+nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
+			   struct drm_file *file_priv)
+{
+	struct drm_nouveau_gem_cpu_prep *req = data;
+	struct drm_gem_object *gem;
+	struct nouveau_bo *nvbo;
+	bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
+	bool write = !!(req->flags & NOUVEAU_GEM_CPU_PREP_WRITE);
+	int ret;
+
+	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
+	if (!gem)
+		return -ENOENT;
+	nvbo = nouveau_gem_object(gem);
+
+	if (no_wait)
+		ret = reservation_object_test_signaled_rcu(nvbo->bo.resv, write) ? 0 : -EBUSY;
+	else {
+		long lret;
+
+		lret = reservation_object_wait_timeout_rcu(nvbo->bo.resv, write, true, 30 * HZ);
+		if (!lret)
+			ret = -EBUSY;
+		else if (lret > 0)
+			ret = 0;
+		else
+			ret = lret;
+	}
+	drm_gem_object_unreference_unlocked(gem);
+
+	return ret;
+}
+
+int
+nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
+			   struct drm_file *file_priv)
+{
+	return 0;
+}
+
+int
+nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
+		       struct drm_file *file_priv)
+{
+	struct drm_nouveau_gem_info *req = data;
+	struct drm_gem_object *gem;
+	int ret;
+
+	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
+	if (!gem)
+		return -ENOENT;
+
+	ret = nouveau_gem_info(file_priv, gem, req);
+	drm_gem_object_unreference_unlocked(gem);
+	return ret;
+}
+