drm/nouveau: Add DRM driver for NVIDIA GPUs

This adds a drm/kms staging non-API stable driver for GPUs from NVIDIA.

This driver is a KMS-based driver and requires a compatible nouveau
userspace libdrm and nouveau X.org driver.

This driver requires firmware files not available in this kernel tree,
interested parties can find them via the nouveau project git archive.

This driver is reverse engineered, and is in no way supported by nVidia.

Support for nearly the complete range of nvidia hw from nv04->g80 (nv50)
is available, and the kms driver should support driving nearly all
output types (displayport is under development still) along with supporting
suspend/resume.

This work is all from the upstream nouveau project found at
nouveau.freedesktop.org.

The original authors list from nouveau git tree is:
Anssi Hannula <anssi.hannula@iki.fi>
Ben Skeggs <bskeggs@redhat.com>
Francisco Jerez <currojerez@riseup.net>
Maarten Maathuis <madman2003@gmail.com>
Marcin Kościelnicki <koriakin@0x04.net>
Matthew Garrett <mjg@redhat.com>
Matt Parnell <mparnell@gmail.com>
Patrice Mandin <patmandin@gmail.com>
Pekka Paalanen <pq@iki.fi>
Xavier Chantry <shiningxc@gmail.com>
along with project founder Stephane Marchesin <marchesin@icps.u-strasbg.fr>

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 992 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 00000000000..11f831f0ddc
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -0,0 +1,992 @@
+/*
+ * 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 "drmP.h"
+#include "drm.h"
+
+#include "nouveau_drv.h"
+#include "nouveau_drm.h"
+#include "nouveau_dma.h"
+
+#define nouveau_gem_pushbuf_sync(chan) 0
+
+int
+nouveau_gem_object_new(struct drm_gem_object *gem)
+{
+	return 0;
+}
+
+void
+nouveau_gem_object_del(struct drm_gem_object *gem)
+{
+	struct nouveau_bo *nvbo = gem->driver_private;
+	struct ttm_buffer_object *bo = &nvbo->bo;
+
+	if (!nvbo)
+		return;
+	nvbo->gem = NULL;
+
+	if (unlikely(nvbo->cpu_filp))
+		ttm_bo_synccpu_write_release(bo);
+
+	if (unlikely(nvbo->pin_refcnt)) {
+		nvbo->pin_refcnt = 1;
+		nouveau_bo_unpin(nvbo);
+	}
+
+	ttm_bo_unref(&bo);
+}
+
+int
+nouveau_gem_new(struct drm_device *dev, struct nouveau_channel *chan,
+		int size, int align, uint32_t flags, uint32_t tile_mode,
+		uint32_t tile_flags, bool no_vm, bool mappable,
+		struct nouveau_bo **pnvbo)
+{
+	struct nouveau_bo *nvbo;
+	int ret;
+
+	ret = nouveau_bo_new(dev, chan, size, align, flags, tile_mode,
+			     tile_flags, no_vm, mappable, pnvbo);
+	if (ret)
+		return ret;
+	nvbo = *pnvbo;
+
+	nvbo->gem = drm_gem_object_alloc(dev, nvbo->bo.mem.size);
+	if (!nvbo->gem) {
+		nouveau_bo_ref(NULL, pnvbo);
+		return -ENOMEM;
+	}
+
+	nvbo->bo.persistant_swap_storage = nvbo->gem->filp;
+	nvbo->gem->driver_private = nvbo;
+	return 0;
+}
+
+static int
+nouveau_gem_info(struct drm_gem_object *gem, struct drm_nouveau_gem_info *rep)
+{
+	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
+
+	if (nvbo->bo.mem.mem_type == TTM_PL_TT)
+		rep->domain = NOUVEAU_GEM_DOMAIN_GART;
+	else
+		rep->domain = NOUVEAU_GEM_DOMAIN_VRAM;
+
+	rep->size = nvbo->bo.mem.num_pages << PAGE_SHIFT;
+	rep->offset = nvbo->bo.offset;
+	rep->map_handle = nvbo->mappable ? nvbo->bo.addr_space_offset : 0;
+	rep->tile_mode = nvbo->tile_mode;
+	rep->tile_flags = nvbo->tile_flags;
+	return 0;
+}
+
+static bool
+nouveau_gem_tile_flags_valid(struct drm_device *dev, uint32_t tile_flags) {
+	switch (tile_flags) {
+	case 0x0000:
+	case 0x1800:
+	case 0x2800:
+	case 0x4800:
+	case 0x7000:
+	case 0x7400:
+	case 0x7a00:
+	case 0xe000:
+		break;
+	default:
+		NV_ERROR(dev, "bad page flags: 0x%08x\n", tile_flags);
+		return false;
+	}
+
+	return true;
+}
+
+int
+nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
+		      struct drm_file *file_priv)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct drm_nouveau_gem_new *req = data;
+	struct nouveau_bo *nvbo = NULL;
+	struct nouveau_channel *chan = NULL;
+	uint32_t flags = 0;
+	int ret = 0;
+
+	NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
+
+	if (unlikely(dev_priv->ttm.bdev.dev_mapping == NULL))
+		dev_priv->ttm.bdev.dev_mapping = dev_priv->dev->dev_mapping;
+
+	if (req->channel_hint) {
+		NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel_hint,
+						     file_priv, chan);
+	}
+
+	if (req->info.domain & NOUVEAU_GEM_DOMAIN_VRAM)
+		flags |= TTM_PL_FLAG_VRAM;
+	if (req->info.domain & NOUVEAU_GEM_DOMAIN_GART)
+		flags |= TTM_PL_FLAG_TT;
+	if (!flags || req->info.domain & NOUVEAU_GEM_DOMAIN_CPU)
+		flags |= TTM_PL_FLAG_SYSTEM;
+
+	if (!nouveau_gem_tile_flags_valid(dev, req->info.tile_flags))
+		return -EINVAL;
+
+	ret = nouveau_gem_new(dev, chan, req->info.size, req->align, flags,
+			      req->info.tile_mode, req->info.tile_flags, false,
+			      (req->info.domain & NOUVEAU_GEM_DOMAIN_MAPPABLE),
+			      &nvbo);
+	if (ret)
+		return ret;
+
+	ret = nouveau_gem_info(nvbo->gem, &req->info);
+	if (ret)
+		goto out;
+
+	ret = drm_gem_handle_create(file_priv, nvbo->gem, &req->info.handle);
+out:
+	mutex_lock(&dev->struct_mutex);
+	drm_gem_object_handle_unreference(nvbo->gem);
+	mutex_unlock(&dev->struct_mutex);
+
+	if (ret)
+		drm_gem_object_unreference(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 = gem->driver_private;
+	struct ttm_buffer_object *bo = &nvbo->bo;
+	uint64_t flags;
+
+	if (!valid_domains || (!read_domains && !write_domains))
+		return -EINVAL;
+
+	if (write_domains) {
+		if ((valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
+		    (write_domains & NOUVEAU_GEM_DOMAIN_VRAM))
+			flags = TTM_PL_FLAG_VRAM;
+		else
+		if ((valid_domains & NOUVEAU_GEM_DOMAIN_GART) &&
+		    (write_domains & NOUVEAU_GEM_DOMAIN_GART))
+			flags = TTM_PL_FLAG_TT;
+		else
+			return -EINVAL;
+	} else {
+		if ((valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
+		    (read_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
+		    bo->mem.mem_type == TTM_PL_VRAM)
+			flags = TTM_PL_FLAG_VRAM;
+		else
+		if ((valid_domains & NOUVEAU_GEM_DOMAIN_GART) &&
+		    (read_domains & NOUVEAU_GEM_DOMAIN_GART) &&
+		    bo->mem.mem_type == TTM_PL_TT)
+			flags = TTM_PL_FLAG_TT;
+		else
+		if ((valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
+		    (read_domains & NOUVEAU_GEM_DOMAIN_VRAM))
+			flags = TTM_PL_FLAG_VRAM;
+		else
+			flags = TTM_PL_FLAG_TT;
+	}
+
+	nouveau_bo_placement_set(nvbo, flags);
+	return 0;
+}
+
+struct validate_op {
+	struct nouveau_fence *fence;
+	struct list_head vram_list;
+	struct list_head gart_list;
+	struct list_head both_list;
+};
+
+static void
+validate_fini_list(struct list_head *list, struct nouveau_fence *fence)
+{
+	struct list_head *entry, *tmp;
+	struct nouveau_bo *nvbo;
+
+	list_for_each_safe(entry, tmp, list) {
+		nvbo = list_entry(entry, struct nouveau_bo, entry);
+		if (likely(fence)) {
+			struct nouveau_fence *prev_fence;
+
+			spin_lock(&nvbo->bo.lock);
+			prev_fence = nvbo->bo.sync_obj;
+			nvbo->bo.sync_obj = nouveau_fence_ref(fence);
+			spin_unlock(&nvbo->bo.lock);
+			nouveau_fence_unref((void *)&prev_fence);
+		}
+
+		list_del(&nvbo->entry);
+		nvbo->reserved_by = NULL;
+		ttm_bo_unreserve(&nvbo->bo);
+		drm_gem_object_unreference(nvbo->gem);
+	}
+}
+
+static void
+validate_fini(struct validate_op *op, bool success)
+{
+	struct nouveau_fence *fence = op->fence;
+
+	if (unlikely(!success))
+		op->fence = NULL;
+
+	validate_fini_list(&op->vram_list, op->fence);
+	validate_fini_list(&op->gart_list, op->fence);
+	validate_fini_list(&op->both_list, op->fence);
+	nouveau_fence_unref((void *)&fence);
+}
+
+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 drm_device *dev = chan->dev;
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	uint32_t sequence;
+	int trycnt = 0;
+	int ret, i;
+
+	sequence = atomic_add_return(1, &dev_priv->ttm.validate_sequence);
+retry:
+	if (++trycnt > 100000) {
+		NV_ERROR(dev, "%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_ERROR(dev, "Unknown handle 0x%08x\n", b->handle);
+			validate_fini(op, NULL);
+			return -EINVAL;
+		}
+		nvbo = gem->driver_private;
+
+		if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
+			NV_ERROR(dev, "multiple instances of buffer %d on "
+				      "validation list\n", b->handle);
+			validate_fini(op, NULL);
+			return -EINVAL;
+		}
+
+		ret = ttm_bo_reserve(&nvbo->bo, false, false, true, sequence);
+		if (ret) {
+			validate_fini(op, NULL);
+			if (ret == -EAGAIN)
+				ret = ttm_bo_wait_unreserved(&nvbo->bo, false);
+			drm_gem_object_unreference(gem);
+			if (ret)
+				return ret;
+			goto retry;
+		}
+
+		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, &op->both_list);
+		else
+		if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
+			list_add_tail(&nvbo->entry, &op->vram_list);
+		else
+		if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
+			list_add_tail(&nvbo->entry, &op->gart_list);
+		else {
+			NV_ERROR(dev, "invalid valid domains: 0x%08x\n",
+				 b->valid_domains);
+			validate_fini(op, NULL);
+			return -EINVAL;
+		}
+
+		if (unlikely(atomic_read(&nvbo->bo.cpu_writers) > 0)) {
+			validate_fini(op, NULL);
+
+			if (nvbo->cpu_filp == file_priv) {
+				NV_ERROR(dev, "bo %p mapped by process trying "
+					      "to validate it!\n", nvbo);
+				return -EINVAL;
+			}
+
+			ret = ttm_bo_wait_cpu(&nvbo->bo, false);
+			if (ret == -ERESTART)
+				ret = -EAGAIN;
+			if (ret)
+				return ret;
+			goto retry;
+		}
+	}
+
+	return 0;
+}
+
+static int
+validate_list(struct nouveau_channel *chan, struct list_head *list,
+	      struct drm_nouveau_gem_pushbuf_bo *pbbo, uint64_t user_pbbo_ptr)
+{
+	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];
+		struct nouveau_fence *prev_fence = nvbo->bo.sync_obj;
+
+		if (prev_fence && nouveau_fence_channel(prev_fence) != chan) {
+			spin_lock(&nvbo->bo.lock);
+			ret = ttm_bo_wait(&nvbo->bo, false, false, false);
+			spin_unlock(&nvbo->bo.lock);
+			if (unlikely(ret))
+				return ret;
+		}
+
+		ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains,
+					     b->write_domains,
+					     b->valid_domains);
+		if (unlikely(ret))
+			return ret;
+
+		nvbo->channel = chan;
+		ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
+				      false, false);
+		nvbo->channel = NULL;
+		if (unlikely(ret))
+			return ret;
+
+		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_ok = 0;
+		relocs++;
+
+		if (DRM_COPY_TO_USER(&upbbo[nvbo->pbbo_index], b, sizeof(*b)))
+			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)
+{
+	int ret, relocs = 0;
+
+	INIT_LIST_HEAD(&op->vram_list);
+	INIT_LIST_HEAD(&op->gart_list);
+	INIT_LIST_HEAD(&op->both_list);
+
+	ret = nouveau_fence_new(chan, &op->fence, false);
+	if (ret)
+		return ret;
+
+	if (nr_buffers == 0)
+		return 0;
+
+	ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
+	if (unlikely(ret))
+		return ret;
+
+	ret = validate_list(chan, &op->vram_list, pbbo, user_buffers);
+	if (unlikely(ret < 0)) {
+		validate_fini(op, NULL);
+		return ret;
+	}
+	relocs += ret;
+
+	ret = validate_list(chan, &op->gart_list, pbbo, user_buffers);
+	if (unlikely(ret < 0)) {
+		validate_fini(op, NULL);
+		return ret;
+	}
+	relocs += ret;
+
+	ret = validate_list(chan, &op->both_list, pbbo, user_buffers);
+	if (unlikely(ret < 0)) {
+		validate_fini(op, NULL);
+		return ret;
+	}
+	relocs += ret;
+
+	*apply_relocs = relocs;
+	return 0;
+}
+
+static inline void *
+u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
+{
+	void *mem;
+	void __user *userptr = (void __force __user *)(uintptr_t)user;
+
+	mem = kmalloc(nmemb * size, GFP_KERNEL);
+	if (!mem)
+		return ERR_PTR(-ENOMEM);
+
+	if (DRM_COPY_FROM_USER(mem, userptr, nmemb * size)) {
+		kfree(mem);
+		return ERR_PTR(-EFAULT);
+	}
+
+	return mem;
+}
+
+static int
+nouveau_gem_pushbuf_reloc_apply(struct nouveau_channel *chan, int nr_bo,
+				struct drm_nouveau_gem_pushbuf_bo *bo,
+				int nr_relocs, uint64_t ptr_relocs,
+				int nr_dwords, int first_dword,
+				uint32_t *pushbuf, bool is_iomem)
+{
+	struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
+	struct drm_device *dev = chan->dev;
+	int ret = 0, i;
+
+	reloc = u_memcpya(ptr_relocs, nr_relocs, sizeof(*reloc));
+	if (IS_ERR(reloc))
+		return PTR_ERR(reloc);
+
+	for (i = 0; i < nr_relocs; i++) {
+		struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
+		struct drm_nouveau_gem_pushbuf_bo *b;
+		uint32_t data;
+
+		if (r->bo_index >= nr_bo || r->reloc_index < first_dword ||
+		    r->reloc_index >= first_dword + nr_dwords) {
+			NV_ERROR(dev, "Bad relocation %d\n", i);
+			NV_ERROR(dev, "  bo: %d max %d\n", r->bo_index, nr_bo);
+			NV_ERROR(dev, "  id: %d max %d\n", r->reloc_index, nr_dwords);
+			ret = -EINVAL;
+			break;
+		}
+
+		b = &bo[r->bo_index];
+		if (b->presumed_ok)
+			continue;
+
+		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;
+		}
+
+		if (is_iomem)
+			iowrite32_native(data, (void __force __iomem *)
+						&pushbuf[r->reloc_index]);
+		else
+			pushbuf[r->reloc_index] = data;
+	}
+
+	kfree(reloc);
+	return ret;
+}
+
+int
+nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
+			  struct drm_file *file_priv)
+{
+	struct drm_nouveau_gem_pushbuf *req = data;
+	struct drm_nouveau_gem_pushbuf_bo *bo = NULL;
+	struct nouveau_channel *chan;
+	struct validate_op op;
+	uint32_t *pushbuf = NULL;
+	int ret = 0, do_reloc = 0, i;
+
+	NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
+	NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
+
+	if (req->nr_dwords >= chan->dma.max ||
+	    req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS ||
+	    req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS) {
+		NV_ERROR(dev, "Pushbuf config exceeds limits:\n");
+		NV_ERROR(dev, "  dwords : %d max %d\n", req->nr_dwords,
+			 chan->dma.max - 1);
+		NV_ERROR(dev, "  buffers: %d max %d\n", req->nr_buffers,
+			 NOUVEAU_GEM_MAX_BUFFERS);
+		NV_ERROR(dev, "  relocs : %d max %d\n", req->nr_relocs,
+			 NOUVEAU_GEM_MAX_RELOCS);
+		return -EINVAL;
+	}
+
+	pushbuf = u_memcpya(req->dwords, req->nr_dwords, sizeof(uint32_t));
+	if (IS_ERR(pushbuf))
+		return PTR_ERR(pushbuf);
+
+	bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
+	if (IS_ERR(bo)) {
+		kfree(pushbuf);
+		return PTR_ERR(bo);
+	}
+
+	mutex_lock(&dev->struct_mutex);
+
+	/* Validate buffer list */
+	ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
+					   req->nr_buffers, &op, &do_reloc);
+	if (ret)
+		goto out;
+
+	/* Apply any relocations that are required */
+	if (do_reloc) {
+		ret = nouveau_gem_pushbuf_reloc_apply(chan, req->nr_buffers,
+						      bo, req->nr_relocs,
+						      req->relocs,
+						      req->nr_dwords, 0,
+						      pushbuf, false);
+		if (ret)
+			goto out;
+	}
+
+	/* Emit push buffer to the hw
+	 */
+	ret = RING_SPACE(chan, req->nr_dwords);
+	if (ret)
+		goto out;
+
+	OUT_RINGp(chan, pushbuf, req->nr_dwords);
+
+	ret = nouveau_fence_emit(op.fence);
+	if (ret) {
+		NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
+		WIND_RING(chan);
+		goto out;
+	}
+
+	if (nouveau_gem_pushbuf_sync(chan)) {
+		ret = nouveau_fence_wait(op.fence, NULL, false, false);
+		if (ret) {
+			for (i = 0; i < req->nr_dwords; i++)
+				NV_ERROR(dev, "0x%08x\n", pushbuf[i]);
+			NV_ERROR(dev, "^^ above push buffer is fail :(\n");
+		}
+	}
+
+out:
+	validate_fini(&op, ret == 0);
+	mutex_unlock(&dev->struct_mutex);
+	kfree(pushbuf);
+	kfree(bo);
+	return ret;
+}
+
+#define PUSHBUF_CAL (dev_priv->card_type >= NV_20)
+
+int
+nouveau_gem_ioctl_pushbuf_call(struct drm_device *dev, void *data,
+			       struct drm_file *file_priv)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct drm_nouveau_gem_pushbuf_call *req = data;
+	struct drm_nouveau_gem_pushbuf_bo *bo = NULL;
+	struct nouveau_channel *chan;
+	struct drm_gem_object *gem;
+	struct nouveau_bo *pbbo;
+	struct validate_op op;
+	int i, ret = 0, do_reloc = 0;
+
+	NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
+	NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
+
+	if (unlikely(req->handle == 0))
+		goto out_next;
+
+	if (req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS ||
+	    req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS) {
+		NV_ERROR(dev, "Pushbuf config exceeds limits:\n");
+		NV_ERROR(dev, "  buffers: %d max %d\n", req->nr_buffers,
+			 NOUVEAU_GEM_MAX_BUFFERS);
+		NV_ERROR(dev, "  relocs : %d max %d\n", req->nr_relocs,
+			 NOUVEAU_GEM_MAX_RELOCS);
+		return -EINVAL;
+	}
+
+	bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
+	if (IS_ERR(bo))
+		return PTR_ERR(bo);
+
+	mutex_lock(&dev->struct_mutex);
+
+	/* Validate buffer list */
+	ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
+					   req->nr_buffers, &op, &do_reloc);
+	if (ret) {
+		NV_ERROR(dev, "validate: %d\n", ret);
+		goto out;
+	}
+
+	/* Validate DMA push buffer */
+	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
+	if (!gem) {
+		NV_ERROR(dev, "Unknown pb handle 0x%08x\n", req->handle);
+		ret = -EINVAL;
+		goto out;
+	}
+	pbbo = nouveau_gem_object(gem);
+
+	ret = ttm_bo_reserve(&pbbo->bo, false, false, true,
+			     chan->fence.sequence);
+	if (ret) {
+		NV_ERROR(dev, "resv pb: %d\n", ret);
+		drm_gem_object_unreference(gem);
+		goto out;
+	}
+
+	nouveau_bo_placement_set(pbbo, 1 << chan->pushbuf_bo->bo.mem.mem_type);
+	ret = ttm_bo_validate(&pbbo->bo, &pbbo->placement, false, false);
+	if (ret) {
+		NV_ERROR(dev, "validate pb: %d\n", ret);
+		ttm_bo_unreserve(&pbbo->bo);
+		drm_gem_object_unreference(gem);
+		goto out;
+	}
+
+	list_add_tail(&pbbo->entry, &op.both_list);
+
+	/* If presumed return address doesn't match, we need to map the
+	 * push buffer and fix it..
+	 */
+	if (!PUSHBUF_CAL) {
+		uint32_t retaddy;
+
+		if (chan->dma.free < 4 + NOUVEAU_DMA_SKIPS) {
+			ret = nouveau_dma_wait(chan, 4 + NOUVEAU_DMA_SKIPS);
+			if (ret) {
+				NV_ERROR(dev, "jmp_space: %d\n", ret);
+				goto out;
+			}
+		}
+
+		retaddy  = chan->pushbuf_base + ((chan->dma.cur + 2) << 2);
+		retaddy |= 0x20000000;
+		if (retaddy != req->suffix0) {
+			req->suffix0 = retaddy;
+			do_reloc = 1;
+		}
+	}
+
+	/* Apply any relocations that are required */
+	if (do_reloc) {
+		void *pbvirt;
+		bool is_iomem;
+		ret = ttm_bo_kmap(&pbbo->bo, 0, pbbo->bo.mem.num_pages,
+				  &pbbo->kmap);
+		if (ret) {
+			NV_ERROR(dev, "kmap pb: %d\n", ret);
+			goto out;
+		}
+
+		pbvirt = ttm_kmap_obj_virtual(&pbbo->kmap, &is_iomem);
+		ret = nouveau_gem_pushbuf_reloc_apply(chan, req->nr_buffers, bo,
+						      req->nr_relocs,
+						      req->relocs,
+						      req->nr_dwords,
+						      req->offset / 4,
+						      pbvirt, is_iomem);
+
+		if (!PUSHBUF_CAL) {
+			nouveau_bo_wr32(pbbo,
+					req->offset / 4 + req->nr_dwords - 2,
+					req->suffix0);
+		}
+
+		ttm_bo_kunmap(&pbbo->kmap);
+		if (ret) {
+			NV_ERROR(dev, "reloc apply: %d\n", ret);
+			goto out;
+		}
+	}
+
+	if (PUSHBUF_CAL) {
+		ret = RING_SPACE(chan, 2);
+		if (ret) {
+			NV_ERROR(dev, "cal_space: %d\n", ret);
+			goto out;
+		}
+		OUT_RING(chan, ((pbbo->bo.mem.mm_node->start << PAGE_SHIFT) +
+				  req->offset) | 2);
+		OUT_RING(chan, 0);
+	} else {
+		ret = RING_SPACE(chan, 2 + NOUVEAU_DMA_SKIPS);
+		if (ret) {
+			NV_ERROR(dev, "jmp_space: %d\n", ret);
+			goto out;
+		}
+		OUT_RING(chan, ((pbbo->bo.mem.mm_node->start << PAGE_SHIFT) +
+				  req->offset) | 0x20000000);
+		OUT_RING(chan, 0);
+
+		/* Space the jumps apart with NOPs. */
+		for (i = 0; i < NOUVEAU_DMA_SKIPS; i++)
+			OUT_RING(chan, 0);
+	}
+
+	ret = nouveau_fence_emit(op.fence);
+	if (ret) {
+		NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
+		WIND_RING(chan);
+		goto out;
+	}
+
+out:
+	validate_fini(&op, ret == 0);
+	mutex_unlock(&dev->struct_mutex);
+	kfree(bo);
+
+out_next:
+	if (PUSHBUF_CAL) {
+		req->suffix0 = 0x00020000;
+		req->suffix1 = 0x00000000;
+	} else {
+		req->suffix0 = 0x20000000 |
+			      (chan->pushbuf_base + ((chan->dma.cur + 2) << 2));
+		req->suffix1 = 0x00000000;
+	}
+
+	return ret;
+}
+
+int
+nouveau_gem_ioctl_pushbuf_call2(struct drm_device *dev, void *data,
+				struct drm_file *file_priv)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct drm_nouveau_gem_pushbuf_call *req = data;
+
+	req->vram_available = dev_priv->fb_aper_free;
+	req->gart_available = dev_priv->gart_info.aper_free;
+
+	return nouveau_gem_ioctl_pushbuf_call(dev, data, file_priv);
+}
+
+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_pin(struct drm_device *dev, void *data,
+		      struct drm_file *file_priv)
+{
+	struct drm_nouveau_gem_pin *req = data;
+	struct drm_gem_object *gem;
+	struct nouveau_bo *nvbo;
+	int ret = 0;
+
+	NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
+
+	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+		NV_ERROR(dev, "pin only allowed without kernel modesetting\n");
+		return -EINVAL;
+	}
+
+	if (!DRM_SUSER(DRM_CURPROC))
+		return -EPERM;
+
+	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
+	if (!gem)
+		return -EINVAL;
+	nvbo = nouveau_gem_object(gem);
+
+	ret = nouveau_bo_pin(nvbo, domain_to_ttm(nvbo, req->domain));
+	if (ret)
+		goto out;
+
+	req->offset = nvbo->bo.offset;
+	if (nvbo->bo.mem.mem_type == TTM_PL_TT)
+		req->domain = NOUVEAU_GEM_DOMAIN_GART;
+	else
+		req->domain = NOUVEAU_GEM_DOMAIN_VRAM;
+
+out:
+	mutex_lock(&dev->struct_mutex);
+	drm_gem_object_unreference(gem);
+	mutex_unlock(&dev->struct_mutex);
+
+	return ret;
+}
+
+int
+nouveau_gem_ioctl_unpin(struct drm_device *dev, void *data,
+			struct drm_file *file_priv)
+{
+	struct drm_nouveau_gem_pin *req = data;
+	struct drm_gem_object *gem;
+	int ret;
+
+	NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
+
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
+	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
+	if (!gem)
+		return -EINVAL;
+
+	ret = nouveau_bo_unpin(nouveau_gem_object(gem));
+
+	mutex_lock(&dev->struct_mutex);
+	drm_gem_object_unreference(gem);
+	mutex_unlock(&dev->struct_mutex);
+
+	return 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);
+	int ret = -EINVAL;
+
+	NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
+
+	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
+	if (!gem)
+		return ret;
+	nvbo = nouveau_gem_object(gem);
+
+	if (nvbo->cpu_filp) {
+		if (nvbo->cpu_filp == file_priv)
+			goto out;
+
+		ret = ttm_bo_wait_cpu(&nvbo->bo, no_wait);
+		if (ret == -ERESTART)
+			ret = -EAGAIN;
+		if (ret)
+			goto out;
+	}
+
+	if (req->flags & NOUVEAU_GEM_CPU_PREP_NOBLOCK) {
+		ret = ttm_bo_wait(&nvbo->bo, false, false, no_wait);
+	} else {
+		ret = ttm_bo_synccpu_write_grab(&nvbo->bo, no_wait);
+		if (ret == -ERESTART)
+			ret = -EAGAIN;
+		else
+		if (ret == 0)
+			nvbo->cpu_filp = file_priv;
+	}
+
+out:
+	mutex_lock(&dev->struct_mutex);
+	drm_gem_object_unreference(gem);
+	mutex_unlock(&dev->struct_mutex);
+	return ret;
+}
+
+int
+nouveau_gem_ioctl_cpu_fini(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;
+	int ret = -EINVAL;
+
+	NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
+
+	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
+	if (!gem)
+		return ret;
+	nvbo = nouveau_gem_object(gem);
+
+	if (nvbo->cpu_filp != file_priv)
+		goto out;
+	nvbo->cpu_filp = NULL;
+
+	ttm_bo_synccpu_write_release(&nvbo->bo);
+	ret = 0;
+
+out:
+	mutex_lock(&dev->struct_mutex);
+	drm_gem_object_unreference(gem);
+	mutex_unlock(&dev->struct_mutex);
+	return ret;
+}
+
+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;
+
+	NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
+
+	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
+	if (!gem)
+		return -EINVAL;
+
+	ret = nouveau_gem_info(gem, req);
+	mutex_lock(&dev->struct_mutex);
+	drm_gem_object_unreference(gem);
+	mutex_unlock(&dev->struct_mutex);
+	return ret;
+}
+