1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/dma/user.c b/drivers/gpu/drm/nouveau/nvkm/engine/dma/user.c
new file mode 100644
index 000000000000..45ab062661a4
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/dma/user.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 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 HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs
+ */
+#include "user.h"
+
+#include <core/client.h>
+#include <core/gpuobj.h>
+#include <subdev/fb.h>
+#include <subdev/instmem.h>
+
+#include <nvif/class.h>
+#include <nvif/unpack.h>
+
+static int
+nvkm_dmaobj_bind(struct nvkm_object *base, struct nvkm_gpuobj *gpuobj,
+		 int align, struct nvkm_gpuobj **pgpuobj)
+{
+	struct nvkm_dmaobj *dmaobj = nvkm_dmaobj(base);
+	return dmaobj->func->bind(dmaobj, gpuobj, align, pgpuobj);
+}
+
+static void *
+nvkm_dmaobj_dtor(struct nvkm_object *base)
+{
+	struct nvkm_dmaobj *dmaobj = nvkm_dmaobj(base);
+	if (!RB_EMPTY_NODE(&dmaobj->rb))
+		rb_erase(&dmaobj->rb, &dmaobj->object.client->dmaroot);
+	return dmaobj;
+}
+
+static const struct nvkm_object_func
+nvkm_dmaobj_func = {
+	.dtor = nvkm_dmaobj_dtor,
+	.bind = nvkm_dmaobj_bind,
+};
+
+int
+nvkm_dmaobj_ctor(const struct nvkm_dmaobj_func *func, struct nvkm_dma *dma,
+		 const struct nvkm_oclass *oclass, void **pdata, u32 *psize,
+		 struct nvkm_dmaobj *dmaobj)
+{
+	union {
+		struct nv_dma_v0 v0;
+	} *args = *pdata;
+	struct nvkm_device *device = dma->engine.subdev.device;
+	struct nvkm_client *client = oclass->client;
+	struct nvkm_object *parent = oclass->parent;
+	struct nvkm_instmem *instmem = device->imem;
+	struct nvkm_fb *fb = device->fb;
+	void *data = *pdata;
+	u32 size = *psize;
+	int ret;
+
+	nvkm_object_ctor(&nvkm_dmaobj_func, oclass, &dmaobj->object);
+	dmaobj->func = func;
+	dmaobj->dma = dma;
+	RB_CLEAR_NODE(&dmaobj->rb);
+
+	nvif_ioctl(parent, "create dma size %d\n", *psize);
+	if (nvif_unpack(args->v0, 0, 0, true)) {
+		nvif_ioctl(parent, "create dma vers %d target %d access %d "
+				   "start %016llx limit %016llx\n",
+			   args->v0.version, args->v0.target, args->v0.access,
+			   args->v0.start, args->v0.limit);
+		dmaobj->target = args->v0.target;
+		dmaobj->access = args->v0.access;
+		dmaobj->start  = args->v0.start;
+		dmaobj->limit  = args->v0.limit;
+	} else
+		return ret;
+
+	*pdata = data;
+	*psize = size;
+
+	if (dmaobj->start > dmaobj->limit)
+		return -EINVAL;
+
+	switch (dmaobj->target) {
+	case NV_DMA_V0_TARGET_VM:
+		dmaobj->target = NV_MEM_TARGET_VM;
+		break;
+	case NV_DMA_V0_TARGET_VRAM:
+		if (!client->super) {
+			if (dmaobj->limit >= fb->ram->size - instmem->reserved)
+				return -EACCES;
+			if (device->card_type >= NV_50)
+				return -EACCES;
+		}
+		dmaobj->target = NV_MEM_TARGET_VRAM;
+		break;
+	case NV_DMA_V0_TARGET_PCI:
+		if (!client->super)
+			return -EACCES;
+		dmaobj->target = NV_MEM_TARGET_PCI;
+		break;
+	case NV_DMA_V0_TARGET_PCI_US:
+	case NV_DMA_V0_TARGET_AGP:
+		if (!client->super)
+			return -EACCES;
+		dmaobj->target = NV_MEM_TARGET_PCI_NOSNOOP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (dmaobj->access) {
+	case NV_DMA_V0_ACCESS_VM:
+		dmaobj->access = NV_MEM_ACCESS_VM;
+		break;
+	case NV_DMA_V0_ACCESS_RD:
+		dmaobj->access = NV_MEM_ACCESS_RO;
+		break;
+	case NV_DMA_V0_ACCESS_WR:
+		dmaobj->access = NV_MEM_ACCESS_WO;
+		break;
+	case NV_DMA_V0_ACCESS_RDWR:
+		dmaobj->access = NV_MEM_ACCESS_RW;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return ret;
+}