1 files changed, 1015 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c
new file mode 100644
index 000000000..fab542a75
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -0,0 +1,1015 @@
+/*
+ * 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 <drm/drm_gem_ttm_helper.h>
+
+#include "nouveau_drv.h"
+#include "nouveau_dma.h"
+#include "nouveau_fence.h"
+#include "nouveau_abi16.h"
+
+#include "nouveau_ttm.h"
+#include "nouveau_gem.h"
+#include "nouveau_mem.h"
+#include "nouveau_vmm.h"
+
+#include <nvif/class.h>
+#include <nvif/push206e.h>
+
+static vm_fault_t nouveau_ttm_fault(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	struct ttm_buffer_object *bo = vma->vm_private_data;
+	pgprot_t prot;
+	vm_fault_t ret;
+
+	ret = ttm_bo_vm_reserve(bo, vmf);
+	if (ret)
+		return ret;
+
+	ret = nouveau_ttm_fault_reserve_notify(bo);
+	if (ret)
+		goto error_unlock;
+
+	nouveau_bo_del_io_reserve_lru(bo);
+	prot = vm_get_page_prot(vma->vm_flags);
+	ret = ttm_bo_vm_fault_reserved(vmf, prot, TTM_BO_VM_NUM_PREFAULT);
+	nouveau_bo_add_io_reserve_lru(bo);
+	if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
+		return ret;
+
+error_unlock:
+	dma_resv_unlock(bo->base.resv);
+	return ret;
+}
+
+static const struct vm_operations_struct nouveau_ttm_vm_ops = {
+	.fault = nouveau_ttm_fault,
+	.open = ttm_bo_vm_open,
+	.close = ttm_bo_vm_close,
+	.access = ttm_bo_vm_access
+};
+
+void
+nouveau_gem_object_del(struct drm_gem_object *gem)
+{
+	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
+	struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev);
+	struct device *dev = drm->dev->dev;
+	int ret;
+
+	ret = pm_runtime_get_sync(dev);
+	if (WARN_ON(ret < 0 && ret != -EACCES)) {
+		pm_runtime_put_autosuspend(dev);
+		return;
+	}
+
+	if (gem->import_attach)
+		drm_prime_gem_destroy(gem, nvbo->bo.sg);
+
+	ttm_bo_put(&nvbo->bo);
+
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+}
+
+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_drm *drm = nouveau_bdev(nvbo->bo.bdev);
+	struct device *dev = drm->dev->dev;
+	struct nouveau_vmm *vmm = cli->svm.cli ? &cli->svm : &cli->vmm;
+	struct nouveau_vma *vma;
+	int ret;
+
+	if (vmm->vmm.object.oclass < NVIF_CLASS_VMM_NV50)
+		return 0;
+
+	ret = ttm_bo_reserve(&nvbo->bo, false, false, NULL);
+	if (ret)
+		return ret;
+
+	ret = pm_runtime_get_sync(dev);
+	if (ret < 0 && ret != -EACCES) {
+		pm_runtime_put_autosuspend(dev);
+		goto out;
+	}
+
+	ret = nouveau_vma_new(nvbo, vmm, &vma);
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+out:
+	ttm_bo_unreserve(&nvbo->bo);
+	return ret;
+}
+
+struct nouveau_gem_object_unmap {
+	struct nouveau_cli_work work;
+	struct nouveau_vma *vma;
+};
+
+static void
+nouveau_gem_object_delete(struct nouveau_vma *vma)
+{
+	nouveau_fence_unref(&vma->fence);
+	nouveau_vma_del(&vma);
+}
+
+static void
+nouveau_gem_object_delete_work(struct nouveau_cli_work *w)
+{
+	struct nouveau_gem_object_unmap *work =
+		container_of(w, typeof(*work), work);
+	nouveau_gem_object_delete(work->vma);
+	kfree(work);
+}
+
+static void
+nouveau_gem_object_unmap(struct nouveau_bo *nvbo, struct nouveau_vma *vma)
+{
+	struct dma_fence *fence = vma->fence ? &vma->fence->base : NULL;
+	struct nouveau_gem_object_unmap *work;
+
+	list_del_init(&vma->head);
+
+	if (!fence) {
+		nouveau_gem_object_delete(vma);
+		return;
+	}
+
+	if (!(work = kmalloc(sizeof(*work), GFP_KERNEL))) {
+		WARN_ON(dma_fence_wait_timeout(fence, false, 2 * HZ) <= 0);
+		nouveau_gem_object_delete(vma);
+		return;
+	}
+
+	work->work.func = nouveau_gem_object_delete_work;
+	work->vma = vma;
+	nouveau_cli_work_queue(vma->vmm->cli, fence, &work->work);
+}
+
+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_drm *drm = nouveau_bdev(nvbo->bo.bdev);
+	struct device *dev = drm->dev->dev;
+	struct nouveau_vmm *vmm = cli->svm.cli ? &cli->svm : & cli->vmm;
+	struct nouveau_vma *vma;
+	int ret;
+
+	if (vmm->vmm.object.oclass < NVIF_CLASS_VMM_NV50)
+		return;
+
+	ret = ttm_bo_reserve(&nvbo->bo, false, false, NULL);
+	if (ret)
+		return;
+
+	vma = nouveau_vma_find(nvbo, vmm);
+	if (vma) {
+		if (--vma->refs == 0) {
+			ret = pm_runtime_get_sync(dev);
+			if (!WARN_ON(ret < 0 && ret != -EACCES)) {
+				nouveau_gem_object_unmap(nvbo, vma);
+				pm_runtime_mark_last_busy(dev);
+			}
+			pm_runtime_put_autosuspend(dev);
+		}
+	}
+	ttm_bo_unreserve(&nvbo->bo);
+}
+
+const struct drm_gem_object_funcs nouveau_gem_object_funcs = {
+	.free = nouveau_gem_object_del,
+	.open = nouveau_gem_object_open,
+	.close = nouveau_gem_object_close,
+	.pin = nouveau_gem_prime_pin,
+	.unpin = nouveau_gem_prime_unpin,
+	.get_sg_table = nouveau_gem_prime_get_sg_table,
+	.vmap = drm_gem_ttm_vmap,
+	.vunmap = drm_gem_ttm_vunmap,
+	.mmap = drm_gem_ttm_mmap,
+	.vm_ops = &nouveau_ttm_vm_ops,
+};
+
+int
+nouveau_gem_new(struct nouveau_cli *cli, u64 size, int align, uint32_t domain,
+		uint32_t tile_mode, uint32_t tile_flags,
+		struct nouveau_bo **pnvbo)
+{
+	struct nouveau_drm *drm = cli->drm;
+	struct nouveau_bo *nvbo;
+	int ret;
+
+	if (!(domain & (NOUVEAU_GEM_DOMAIN_VRAM | NOUVEAU_GEM_DOMAIN_GART)))
+		domain |= NOUVEAU_GEM_DOMAIN_CPU;
+
+	nvbo = nouveau_bo_alloc(cli, &size, &align, domain, tile_mode,
+				tile_flags);
+	if (IS_ERR(nvbo))
+		return PTR_ERR(nvbo);
+
+	nvbo->bo.base.funcs = &nouveau_gem_object_funcs;
+
+	/* 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(drm->dev, &nvbo->bo.base, size);
+	if (ret) {
+		drm_gem_object_release(&nvbo->bo.base);
+		kfree(nvbo);
+		return ret;
+	}
+
+	ret = nouveau_bo_init(nvbo, size, align, domain, NULL, NULL);
+	if (ret)
+		return ret;
+
+	/* 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->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA)
+		nvbo->valid_domains &= domain;
+
+	*pnvbo = nvbo;
+	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_vmm *vmm = cli->svm.cli ? &cli->svm : &cli->vmm;
+	struct nouveau_vma *vma;
+
+	if (is_power_of_2(nvbo->valid_domains))
+		rep->domain = nvbo->valid_domains;
+	else if (nvbo->bo.resource->mem_type == TTM_PL_TT)
+		rep->domain = NOUVEAU_GEM_DOMAIN_GART;
+	else
+		rep->domain = NOUVEAU_GEM_DOMAIN_VRAM;
+	rep->offset = nvbo->offset;
+	if (vmm->vmm.object.oclass >= NVIF_CLASS_VMM_NV50) {
+		vma = nouveau_vma_find(nvbo, vmm);
+		if (!vma)
+			return -EINVAL;
+
+		rep->offset = vma->addr;
+	}
+
+	rep->size = nvbo->bo.base.size;
+	rep->map_handle = drm_vma_node_offset_addr(&nvbo->bo.base.vma_node);
+	rep->tile_mode = nvbo->mode;
+	rep->tile_flags = nvbo->contig ? 0 : NOUVEAU_GEM_TILE_NONCONTIG;
+	if (cli->device.info.family >= NV_DEVICE_INFO_V0_FERMI)
+		rep->tile_flags |= nvbo->kind << 8;
+	else
+	if (cli->device.info.family >= NV_DEVICE_INFO_V0_TESLA)
+		rep->tile_flags |= nvbo->kind << 8 | nvbo->comp << 16;
+	else
+		rep->tile_flags |= nvbo->zeta;
+	return 0;
+}
+
+int
+nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
+		      struct drm_file *file_priv)
+{
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	struct drm_nouveau_gem_new *req = data;
+	struct nouveau_bo *nvbo = NULL;
+	int ret = 0;
+
+	ret = nouveau_gem_new(cli, 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->bo.base,
+				    &req->info.handle);
+	if (ret == 0) {
+		ret = nouveau_gem_info(file_priv, &nvbo->bo.base, &req->info);
+		if (ret)
+			drm_gem_handle_delete(file_priv, req->info.handle);
+	}
+
+	/* drop reference from allocate - handle holds it now */
+	drm_gem_object_put(&nvbo->bo.base);
+	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_domains = 0;
+
+	if (!domains)
+		return -EINVAL;
+
+	valid_domains &= ~(NOUVEAU_GEM_DOMAIN_VRAM | NOUVEAU_GEM_DOMAIN_GART);
+
+	if ((domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
+	    bo->resource->mem_type == TTM_PL_VRAM)
+		pref_domains |= NOUVEAU_GEM_DOMAIN_VRAM;
+
+	else if ((domains & NOUVEAU_GEM_DOMAIN_GART) &&
+		 bo->resource->mem_type == TTM_PL_TT)
+		pref_domains |= NOUVEAU_GEM_DOMAIN_GART;
+
+	else if (domains & NOUVEAU_GEM_DOMAIN_VRAM)
+		pref_domains |= NOUVEAU_GEM_DOMAIN_VRAM;
+
+	else
+		pref_domains |= NOUVEAU_GEM_DOMAIN_GART;
+
+	nouveau_bo_placement_set(nvbo, pref_domains, valid_domains);
+
+	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_channel *chan,
+			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 (chan->vmm->vmm.object.oclass >= NVIF_CLASS_VMM_NV50) {
+				struct nouveau_vma *vma =
+					(void *)(unsigned long)b->user_priv;
+				nouveau_fence_unref(&vma->fence);
+				dma_fence_get(&fence->base);
+				vma->fence = fence;
+			}
+		}
+
+		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(&nvbo->bo);
+		drm_gem_object_put(&nvbo->bo.base);
+	}
+}
+
+static void
+validate_fini(struct validate_op *op, struct nouveau_channel *chan,
+	      struct nouveau_fence *fence,
+	      struct drm_nouveau_gem_pushbuf_bo *pbbo)
+{
+	validate_fini_no_ticket(op, chan, 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);
+	int trycnt = 0;
+	int ret = -EINVAL, 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(err, 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(file_priv, b->handle);
+		if (!gem) {
+			NV_PRINTK(err, 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_put(gem);
+			continue;
+		}
+
+		if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
+			NV_PRINTK(err, cli, "multiple instances of buffer %d on "
+				      "validation list\n", b->handle);
+			drm_gem_object_put(gem);
+			ret = -EINVAL;
+			break;
+		}
+
+		ret = ttm_bo_reserve(&nvbo->bo, true, false, &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, chan, 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(err, cli, "fail reserve\n");
+				break;
+			}
+		}
+
+		if (chan->vmm->vmm.object.oclass >= NVIF_CLASS_VMM_NV50) {
+			struct nouveau_vmm *vmm = chan->vmm;
+			struct nouveau_vma *vma = nouveau_vma_find(nvbo, vmm);
+			if (!vma) {
+				NV_PRINTK(err, cli, "vma not found!\n");
+				ret = -EINVAL;
+				break;
+			}
+
+			b->user_priv = (uint64_t)(unsigned long)vma;
+		} else {
+			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(err, 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, chan, 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)
+{
+	struct nouveau_drm *drm = chan->drm;
+	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->bo.base, b->read_domains,
+					     b->write_domains,
+					     b->valid_domains);
+		if (unlikely(ret)) {
+			NV_PRINTK(err, cli, "fail set_domain\n");
+			return ret;
+		}
+
+		ret = nouveau_bo_validate(nvbo, true, false);
+		if (unlikely(ret)) {
+			if (ret != -ERESTARTSYS)
+				NV_PRINTK(err, 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(err, cli, "fail post-validate sync\n");
+			return ret;
+		}
+
+		if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
+			if (nvbo->offset == b->presumed.offset &&
+			    ((nvbo->bo.resource->mem_type == TTM_PL_VRAM &&
+			      b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
+			     (nvbo->bo.resource->mem_type == TTM_PL_TT &&
+			      b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
+				continue;
+
+			if (nvbo->bo.resource->mem_type == TTM_PL_TT)
+				b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
+			else
+				b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
+			b->presumed.offset = nvbo->offset;
+			b->presumed.valid = 0;
+			relocs++;
+		}
+	}
+
+	return relocs;
+}
+
+static int
+nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
+			     struct drm_file *file_priv,
+			     struct drm_nouveau_gem_pushbuf_bo *pbbo,
+			     int nr_buffers,
+			     struct validate_op *op, bool *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(err, cli, "validate_init\n");
+		return ret;
+	}
+
+	ret = validate_list(chan, cli, &op->list, pbbo);
+	if (unlikely(ret < 0)) {
+		if (ret != -ERESTARTSYS)
+			NV_PRINTK(err, cli, "validating bo list\n");
+		validate_fini(op, chan, NULL, NULL);
+		return ret;
+	} else if (ret > 0) {
+		*apply_relocs = true;
+	}
+
+	return 0;
+}
+
+static inline void
+u_free(void *addr)
+{
+	kvfree(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 = kvmalloc(size, GFP_KERNEL);
+	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_reloc *reloc,
+				struct drm_nouveau_gem_pushbuf_bo *bo)
+{
+	int ret = 0;
+	unsigned i;
+
+	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(err, 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(err, 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.base.size)) {
+			NV_PRINTK(err, cli, "reloc outside of bo\n");
+			ret = -EINVAL;
+			break;
+		}
+
+		if (!nvbo->kmap.virtual) {
+			ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.resource->num_pages,
+					  &nvbo->kmap);
+			if (ret) {
+				NV_PRINTK(err, 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, false, false);
+		if (ret) {
+			NV_PRINTK(err, cli, "reloc wait_idle failed: %d\n", ret);
+			break;
+		}
+
+		nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
+	}
+
+	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);
+	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_reloc *reloc = NULL;
+	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;
+	bool do_reloc = false, sync = false;
+
+	if (unlikely(!abi16))
+		return -ENOMEM;
+
+	list_for_each_entry(temp, &abi16->channels, head) {
+		if (temp->chan->chid == req->channel) {
+			chan = temp->chan;
+			break;
+		}
+	}
+
+	if (!chan)
+		return nouveau_abi16_put(abi16, -ENOENT);
+	if (unlikely(atomic_read(&chan->killed)))
+		return nouveau_abi16_put(abi16, -ENODEV);
+
+	sync = req->vram_available & NOUVEAU_GEM_PUSHBUF_SYNC;
+
+	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(err, 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(err, 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(err, 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(err, cli, "push %d buffer not in list\n", i);
+			ret = -EINVAL;
+			goto out_prevalid;
+		}
+	}
+
+	/* Validate buffer list */
+revalidate:
+	ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo,
+					   req->nr_buffers, &op, &do_reloc);
+	if (ret) {
+		if (ret != -ERESTARTSYS)
+			NV_PRINTK(err, cli, "validate: %d\n", ret);
+		goto out_prevalid;
+	}
+
+	/* Apply any relocations that are required */
+	if (do_reloc) {
+		if (!reloc) {
+			validate_fini(&op, chan, NULL, bo);
+			reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
+			if (IS_ERR(reloc)) {
+				ret = PTR_ERR(reloc);
+				goto out_prevalid;
+			}
+
+			goto revalidate;
+		}
+
+		ret = nouveau_gem_pushbuf_reloc_apply(cli, req, reloc, bo);
+		if (ret) {
+			NV_PRINTK(err, 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(err, cli, "nv50cal_space: %d\n", ret);
+			goto out;
+		}
+
+		for (i = 0; i < req->nr_push; i++) {
+			struct nouveau_vma *vma = (void *)(unsigned long)
+				bo[push[i].bo_index].user_priv;
+
+			nv50_dma_push(chan, vma->addr + push[i].offset,
+				      push[i].length);
+		}
+	} else
+	if (drm->client.device.info.chipset >= 0x25) {
+		ret = PUSH_WAIT(chan->chan.push, req->nr_push * 2);
+		if (ret) {
+			NV_PRINTK(err, 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;
+
+			PUSH_CALL(chan->chan.push, nvbo->offset + push[i].offset);
+			PUSH_DATA(chan->chan.push, 0);
+		}
+	} else {
+		ret = PUSH_WAIT(chan->chan.push, req->nr_push * (2 + NOUVEAU_DMA_SKIPS));
+		if (ret) {
+			NV_PRINTK(err, 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.addr + ((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.resource->
+							  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);
+			}
+
+			PUSH_JUMP(chan->chan.push, nvbo->offset + push[i].offset);
+			PUSH_DATA(chan->chan.push, 0);
+			for (j = 0; j < NOUVEAU_DMA_SKIPS; j++)
+				PUSH_DATA(chan->chan.push, 0);
+		}
+	}
+
+	ret = nouveau_fence_new(chan, false, &fence);
+	if (ret) {
+		NV_PRINTK(err, cli, "error fencing pushbuf: %d\n", ret);
+		WIND_RING(chan);
+		goto out;
+	}
+
+	if (sync) {
+		if (!(ret = nouveau_fence_wait(fence, false, false))) {
+			if ((ret = dma_fence_get_status(&fence->base)) == 1)
+				ret = 0;
+		}
+	}
+
+out:
+	validate_fini(&op, chan, fence, bo);
+	nouveau_fence_unref(&fence);
+
+	if (do_reloc) {
+		struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
+			u64_to_user_ptr(req->buffers);
+
+		for (i = 0; i < req->nr_buffers; i++) {
+			if (bo[i].presumed.valid)
+				continue;
+
+			if (copy_to_user(&upbbo[i].presumed, &bo[i].presumed,
+					 sizeof(bo[i].presumed))) {
+				ret = -EFAULT;
+				break;
+			}
+		}
+	}
+out_prevalid:
+	if (!IS_ERR(reloc))
+		u_free(reloc);
+	u_free(bo);
+	u_free(push);
+
+out_next:
+	if (chan->dma.ib_max) {
+		req->suffix0 = 0x00000000;
+		req->suffix1 = 0x00000000;
+	} else
+	if (drm->client.device.info.chipset >= 0x25) {
+		req->suffix0 = 0x00020000;
+		req->suffix1 = 0x00000000;
+	} else {
+		req->suffix0 = 0x20000000 |
+			      (chan->push.addr + ((chan->dma.cur + 2) << 2));
+		req->suffix1 = 0x00000000;
+	}
+
+	return nouveau_abi16_put(abi16, ret);
+}
+
+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);
+	long lret;
+	int ret;
+
+	gem = drm_gem_object_lookup(file_priv, req->handle);
+	if (!gem)
+		return -ENOENT;
+	nvbo = nouveau_gem_object(gem);
+
+	lret = dma_resv_wait_timeout(nvbo->bo.base.resv,
+				     dma_resv_usage_rw(write), true,
+				     no_wait ? 0 : 30 * HZ);
+	if (!lret)
+		ret = -EBUSY;
+	else if (lret > 0)
+		ret = 0;
+	else
+		ret = lret;
+
+	nouveau_bo_sync_for_cpu(nvbo);
+	drm_gem_object_put(gem);
+
+	return ret;
+}
+
+int
+nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
+			   struct drm_file *file_priv)
+{
+	struct drm_nouveau_gem_cpu_fini *req = data;
+	struct drm_gem_object *gem;
+	struct nouveau_bo *nvbo;
+
+	gem = drm_gem_object_lookup(file_priv, req->handle);
+	if (!gem)
+		return -ENOENT;
+	nvbo = nouveau_gem_object(gem);
+
+	nouveau_bo_sync_for_device(nvbo);
+	drm_gem_object_put(gem);
+	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(file_priv, req->handle);
+	if (!gem)
+		return -ENOENT;
+
+	ret = nouveau_gem_info(file_priv, gem, req);
+	drm_gem_object_put(gem);
+	return ret;
+}
+