drm/nouveau/dma: audit and version NV_DMA classes

The full object interfaces are about to be exposed to userspace, so we
need to check for any security-related issues and version the structs
to make it easier to handle any changes we may need in the future.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/engine/dmaobj/base.c

@@ -23,9 +23,12 @@
  */
 
 #include <core/object.h>
-#include <core/class.h>
+#include <core/client.h>
+#include <nvif/unpack.h>
+#include <nvif/class.h>
 
 #include <subdev/fb.h>
+#include <subdev/instmem.h>
 
 #include "priv.h"
 
@@ -57,57 +60,87 @@ nvkm_dmaobj_create_(struct nouveau_object *parent,
 		    struct nouveau_oclass *oclass, void **pdata, u32 *psize,
 		    int length, void **pobject)
 {
-	struct nv_dma_class *args = *pdata;
+	union {
+		struct nv_dma_v0 v0;
+	} *args = *pdata;
+	struct nouveau_instmem *instmem = nouveau_instmem(parent);
+	struct nouveau_client *client = nouveau_client(parent);
+	struct nouveau_device *device = nv_device(parent);
+	struct nouveau_fb *pfb = nouveau_fb(parent);
 	struct nouveau_dmaobj *dmaobj;
+	void *data = *pdata;
+	u32 size = *psize;
 	int ret;
 
-	if (*psize < sizeof(*args))
-		return -EINVAL;
-	*pdata = &args->conf0;
-
 	ret = nouveau_object_create_(parent, engine, oclass, 0, length, pobject);
 	dmaobj = *pobject;
 	if (ret)
 		return ret;
 
-	switch (args->flags & NV_DMA_TARGET_MASK) {
-	case NV_DMA_TARGET_VM:
+	nv_ioctl(parent, "create dma size %d\n", *psize);
+	if (nvif_unpack(args->v0, 0, 0, true)) {
+		nv_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_TARGET_VRAM:
+	case NV_DMA_V0_TARGET_VRAM:
+		if (!client->super) {
+			if (dmaobj->limit >= pfb->ram->size - instmem->reserved)
+				return -EACCES;
+			if (device->card_type >= NV_50)
+				return -EACCES;
+		}
 		dmaobj->target = NV_MEM_TARGET_VRAM;
 		break;
-	case NV_DMA_TARGET_PCI:
+	case NV_DMA_V0_TARGET_PCI:
+		if (!client->super)
+			return -EACCES;
 		dmaobj->target = NV_MEM_TARGET_PCI;
 		break;
-	case NV_DMA_TARGET_PCI_US:
-	case NV_DMA_TARGET_AGP:
+	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 (args->flags & NV_DMA_ACCESS_MASK) {
-	case NV_DMA_ACCESS_VM:
+	switch (dmaobj->access) {
+	case NV_DMA_V0_ACCESS_VM:
 		dmaobj->access = NV_MEM_ACCESS_VM;
 		break;
-	case NV_DMA_ACCESS_RD:
+	case NV_DMA_V0_ACCESS_RD:
 		dmaobj->access = NV_MEM_ACCESS_RO;
 		break;
-	case NV_DMA_ACCESS_WR:
+	case NV_DMA_V0_ACCESS_WR:
 		dmaobj->access = NV_MEM_ACCESS_WO;
 		break;
-	case NV_DMA_ACCESS_RDWR:
+	case NV_DMA_V0_ACCESS_RDWR:
 		dmaobj->access = NV_MEM_ACCESS_RW;
 		break;
 	default:
 		return -EINVAL;
 	}
 
-	dmaobj->start = args->start;
-	dmaobj->limit = args->limit;
-	dmaobj->conf0 = args->conf0;
 	return ret;
 }
 

drivers/gpu/drm/nouveau/core/engine/dmaobj/nv04.c

@@ -24,6 +24,7 @@
 
 #include <core/gpuobj.h>
 #include <core/class.h>
+#include <nvif/class.h>
 
 #include <subdev/fb.h>
 #include <subdev/vm/nv04.h>
@@ -94,7 +95,7 @@ nv04_dmaobj_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 
 	ret = nvkm_dmaobj_create(parent, engine, oclass, &data, &size, &priv);
 	*pobject = nv_object(priv);
-	if (ret)
+	if (ret || (ret = -ENOSYS, size))
 		return ret;
 
 	if (priv->base.target == NV_MEM_TARGET_VM) {
@@ -145,9 +146,9 @@ nv04_dmaobj_ofuncs = {
 
 static struct nouveau_oclass
 nv04_dmaeng_sclass[] = {
-	{ NV_DMA_FROM_MEMORY_CLASS, &nv04_dmaobj_ofuncs },
-	{ NV_DMA_TO_MEMORY_CLASS, &nv04_dmaobj_ofuncs },
-	{ NV_DMA_IN_MEMORY_CLASS, &nv04_dmaobj_ofuncs },
+	{ NV_DMA_FROM_MEMORY, &nv04_dmaobj_ofuncs },
+	{ NV_DMA_TO_MEMORY, &nv04_dmaobj_ofuncs },
+	{ NV_DMA_IN_MEMORY, &nv04_dmaobj_ofuncs },
 	{}
 };
 

drivers/gpu/drm/nouveau/core/engine/dmaobj/nv50.c

@@ -22,8 +22,11 @@
  * Authors: Ben Skeggs
  */
 
+#include <core/client.h>
 #include <core/gpuobj.h>
 #include <core/class.h>
+#include <nvif/unpack.h>
+#include <nvif/class.h>
 
 #include <subdev/fb.h>
 
@@ -90,10 +93,11 @@ nv50_dmaobj_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 		 struct nouveau_object **pobject)
 {
 	struct nouveau_dmaeng *dmaeng = (void *)engine;
-	struct nv50_dmaobj_priv *priv;
 	union {
-		u32 conf0;
+		struct nv50_dma_v0 v0;
 	} *args;
+	struct nv50_dmaobj_priv *priv;
+	u32 user, part, comp, kind;
 	int ret;
 
 	ret = nvkm_dmaobj_create(parent, engine, oclass, &data, &size, &priv);
@@ -102,24 +106,36 @@ nv50_dmaobj_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 		return ret;
 	args = data;
 
-	if (!(args->conf0 & NV50_DMA_CONF0_ENABLE)) {
-		if (priv->base.target == NV_MEM_TARGET_VM) {
-			args->conf0  = NV50_DMA_CONF0_PRIV_VM;
-			args->conf0 |= NV50_DMA_CONF0_PART_VM;
-			args->conf0 |= NV50_DMA_CONF0_COMP_VM;
-			args->conf0 |= NV50_DMA_CONF0_TYPE_VM;
+	nv_ioctl(parent, "create nv50 dma size %d\n", size);
+	if (nvif_unpack(args->v0, 0, 0, false)) {
+		nv_ioctl(parent, "create nv50 dma vers %d priv %d part %d "
+				 "comp %d kind %02x\n", args->v0.version,
+			 args->v0.priv, args->v0.part, args->v0.comp,
+			 args->v0.kind);
+		user = args->v0.priv;
+		part = args->v0.part;
+		comp = args->v0.comp;
+		kind = args->v0.kind;
+	} else
+	if (size == 0) {
+		if (priv->base.target != NV_MEM_TARGET_VM) {
+			user = NV50_DMA_V0_PRIV_US;
+			part = NV50_DMA_V0_PART_256;
+			comp = NV50_DMA_V0_COMP_NONE;
+			kind = NV50_DMA_V0_KIND_PITCH;
 		} else {
-			args->conf0  = NV50_DMA_CONF0_PRIV_US;
-			args->conf0 |= NV50_DMA_CONF0_PART_256;
-			args->conf0 |= NV50_DMA_CONF0_COMP_NONE;
-			args->conf0 |= NV50_DMA_CONF0_TYPE_LINEAR;
+			user = NV50_DMA_V0_PRIV_VM;
+			part = NV50_DMA_V0_PART_VM;
+			comp = NV50_DMA_V0_COMP_VM;
+			kind = NV50_DMA_V0_KIND_VM;
 		}
-	}
+	} else
+		return ret;
 
-	priv->flags0 |= (args->conf0 & NV50_DMA_CONF0_COMP) << 22;
-	priv->flags0 |= (args->conf0 & NV50_DMA_CONF0_TYPE) << 22;
-	priv->flags0 |= (args->conf0 & NV50_DMA_CONF0_PRIV);
-	priv->flags5 |= (args->conf0 & NV50_DMA_CONF0_PART);
+	if (user > 2 || part > 2 || comp > 3 || kind > 0x7f)
+		return -EINVAL;
+	priv->flags0 = (comp << 29) | (kind << 22) | (user << 20);
+	priv->flags5 = (part << 16);
 
 	switch (priv->base.target) {
 	case NV_MEM_TARGET_VM:
@@ -165,9 +181,9 @@ nv50_dmaobj_ofuncs = {
 
 static struct nouveau_oclass
 nv50_dmaeng_sclass[] = {
-	{ NV_DMA_FROM_MEMORY_CLASS, &nv50_dmaobj_ofuncs },
-	{ NV_DMA_TO_MEMORY_CLASS, &nv50_dmaobj_ofuncs },
-	{ NV_DMA_IN_MEMORY_CLASS, &nv50_dmaobj_ofuncs },
+	{ NV_DMA_FROM_MEMORY, &nv50_dmaobj_ofuncs },
+	{ NV_DMA_TO_MEMORY, &nv50_dmaobj_ofuncs },
+	{ NV_DMA_IN_MEMORY, &nv50_dmaobj_ofuncs },
 	{}
 };
 

drivers/gpu/drm/nouveau/core/engine/dmaobj/nvc0.c

@@ -22,9 +22,12 @@
  * Authors: Ben Skeggs
  */
 
+#include <core/client.h>
 #include <core/device.h>
 #include <core/gpuobj.h>
 #include <core/class.h>
+#include <nvif/unpack.h>
+#include <nvif/class.h>
 
 #include <subdev/fb.h>
 
@@ -76,10 +79,11 @@ nvc0_dmaobj_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 		 struct nouveau_object **pobject)
 {
 	struct nouveau_dmaeng *dmaeng = (void *)engine;
-	struct nvc0_dmaobj_priv *priv;
 	union {
-		u32 conf0;
+		struct gf100_dma_v0 v0;
 	} *args;
+	struct nvc0_dmaobj_priv *priv;
+	u32 kind, user, unkn;
 	int ret;
 
 	ret = nvkm_dmaobj_create(parent, engine, oclass, &data, &size, &priv);
@@ -88,20 +92,31 @@ nvc0_dmaobj_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 		return ret;
 	args = data;
 
-	if (!(args->conf0 & NVC0_DMA_CONF0_ENABLE)) {
-		if (priv->base.target == NV_MEM_TARGET_VM) {
-			args->conf0  = NVC0_DMA_CONF0_PRIV_VM;
-			args->conf0 |= NVC0_DMA_CONF0_TYPE_VM;
+	nv_ioctl(parent, "create gf100 dma size %d\n", size);
+	if (nvif_unpack(args->v0, 0, 0, false)) {
+		nv_ioctl(parent, "create gf100 dma vers %d priv %d kind %02x\n",
+			 args->v0.version, args->v0.priv, args->v0.kind);
+		kind = args->v0.kind;
+		user = args->v0.priv;
+		unkn = 0;
+	} else
+	if (size == 0) {
+		if (priv->base.target != NV_MEM_TARGET_VM) {
+			kind = GF100_DMA_V0_KIND_PITCH;
+			user = GF100_DMA_V0_PRIV_US;
+			unkn = 2;
 		} else {
-			args->conf0  = NVC0_DMA_CONF0_PRIV_US;
-			args->conf0 |= NVC0_DMA_CONF0_TYPE_LINEAR;
-			args->conf0 |= 0x00020000;
+			kind = GF100_DMA_V0_KIND_VM;
+			user = GF100_DMA_V0_PRIV_VM;
+			unkn = 0;
 		}
-	}
+	} else
+		return ret;
 
-	priv->flags0 |= (args->conf0 & NVC0_DMA_CONF0_TYPE) << 22;
-	priv->flags0 |= (args->conf0 & NVC0_DMA_CONF0_PRIV);
-	priv->flags5 |= (args->conf0 & NVC0_DMA_CONF0_UNKN);
+	if (user > 2)
+		return -EINVAL;
+	priv->flags0 |= (kind << 22) | (user << 20);
+	priv->flags5 |= (unkn << 16);
 
 	switch (priv->base.target) {
 	case NV_MEM_TARGET_VM:
@@ -145,9 +160,9 @@ nvc0_dmaobj_ofuncs = {
 
 static struct nouveau_oclass
 nvc0_dmaeng_sclass[] = {
-	{ NV_DMA_FROM_MEMORY_CLASS, &nvc0_dmaobj_ofuncs },
-	{ NV_DMA_TO_MEMORY_CLASS, &nvc0_dmaobj_ofuncs },
-	{ NV_DMA_IN_MEMORY_CLASS, &nvc0_dmaobj_ofuncs },
+	{ NV_DMA_FROM_MEMORY, &nvc0_dmaobj_ofuncs },
+	{ NV_DMA_TO_MEMORY, &nvc0_dmaobj_ofuncs },
+	{ NV_DMA_IN_MEMORY, &nvc0_dmaobj_ofuncs },
 	{}
 };
 

drivers/gpu/drm/nouveau/core/engine/dmaobj/nvd0.c

@@ -22,9 +22,12 @@
  * Authors: Ben Skeggs
  */
 
+#include <core/client.h>
 #include <core/device.h>
 #include <core/gpuobj.h>
 #include <core/class.h>
+#include <nvif/unpack.h>
+#include <nvif/class.h>
 
 #include <subdev/fb.h>
 
@@ -83,10 +86,11 @@ nvd0_dmaobj_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 		 struct nouveau_object **pobject)
 {
 	struct nouveau_dmaeng *dmaeng = (void *)engine;
-	struct nvd0_dmaobj_priv *priv;
 	union {
-		u32 conf0;
+		struct gf110_dma_v0 v0;
 	} *args;
+	struct nvd0_dmaobj_priv *priv;
+	u32 kind, page;
 	int ret;
 
 	ret = nvkm_dmaobj_create(parent, engine, oclass, &data, &size, &priv);
@@ -95,18 +99,27 @@ nvd0_dmaobj_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 		return ret;
 	args = data;
 
-	if (!(args->conf0 & NVD0_DMA_CONF0_ENABLE)) {
-		if (priv->base.target == NV_MEM_TARGET_VM) {
-			args->conf0 |= NVD0_DMA_CONF0_TYPE_VM;
-			args->conf0 |= NVD0_DMA_CONF0_PAGE_LP;
+	nv_ioctl(parent, "create gf110 dma size %d\n", size);
+	if (nvif_unpack(args->v0, 0, 0, false)) {
+		nv_ioctl(parent, "create gf100 dma vers %d page %d kind %02x\n",
+			 args->v0.version, args->v0.page, args->v0.kind);
+		kind = args->v0.kind;
+		page = args->v0.page;
+	} else
+	if (size == 0) {
+		if (priv->base.target != NV_MEM_TARGET_VM) {
+			kind = GF110_DMA_V0_KIND_PITCH;
+			page = GF110_DMA_V0_PAGE_SP;
 		} else {
-			args->conf0 |= NVD0_DMA_CONF0_TYPE_LINEAR;
-			args->conf0 |= NVD0_DMA_CONF0_PAGE_SP;
+			kind = GF110_DMA_V0_KIND_VM;
+			page = GF110_DMA_V0_PAGE_LP;
 		}
-	}
+	} else
+		return ret;
 
-	priv->flags0 |= (args->conf0 & NVD0_DMA_CONF0_TYPE) << 20;
-	priv->flags0 |= (args->conf0 & NVD0_DMA_CONF0_PAGE) >> 4;
+	if (page > 1)
+		return -EINVAL;
+	priv->flags0 = (kind << 20) | (page << 6);
 
 	switch (priv->base.target) {
 	case NV_MEM_TARGET_VRAM:
@@ -138,9 +151,9 @@ nvd0_dmaobj_ofuncs = {
 
 static struct nouveau_oclass
 nvd0_dmaeng_sclass[] = {
-	{ NV_DMA_FROM_MEMORY_CLASS, &nvd0_dmaobj_ofuncs },
-	{ NV_DMA_TO_MEMORY_CLASS, &nvd0_dmaobj_ofuncs },
-	{ NV_DMA_IN_MEMORY_CLASS, &nvd0_dmaobj_ofuncs },
+	{ NV_DMA_FROM_MEMORY, &nvd0_dmaobj_ofuncs },
+	{ NV_DMA_TO_MEMORY, &nvd0_dmaobj_ofuncs },
+	{ NV_DMA_IN_MEMORY, &nvd0_dmaobj_ofuncs },
 	{}
 };
 

drivers/gpu/drm/nouveau/core/engine/fifo/base.c

@@ -76,8 +76,8 @@ nouveau_fifo_channel_create_(struct nouveau_object *parent,
 
 	dmaeng = (void *)chan->pushdma->base.engine;
 	switch (chan->pushdma->base.oclass->handle) {
-	case NV_DMA_FROM_MEMORY_CLASS:
-	case NV_DMA_IN_MEMORY_CLASS:
+	case NV_DMA_FROM_MEMORY:
+	case NV_DMA_IN_MEMORY:
 		break;
 	default:
 		return -EINVAL;

drivers/gpu/drm/nouveau/core/include/core/class.h

@@ -3,73 +3,6 @@
 
 #include <nvif/class.h>
 
-/* DMA object classes
- *
- * 0002: NV_DMA_FROM_MEMORY
- * 0003: NV_DMA_TO_MEMORY
- * 003d: NV_DMA_IN_MEMORY
- */
-#define NV_DMA_FROM_MEMORY_CLASS                                     0x00000002
-#define NV_DMA_TO_MEMORY_CLASS                                       0x00000003
-#define NV_DMA_IN_MEMORY_CLASS                                       0x0000003d
-
-#define NV_DMA_TARGET_MASK                                           0x000000ff
-#define NV_DMA_TARGET_VM                                             0x00000000
-#define NV_DMA_TARGET_VRAM                                           0x00000001
-#define NV_DMA_TARGET_PCI                                            0x00000002
-#define NV_DMA_TARGET_PCI_US                                         0x00000003
-#define NV_DMA_TARGET_AGP                                            0x00000004
-#define NV_DMA_ACCESS_MASK                                           0x00000f00
-#define NV_DMA_ACCESS_VM                                             0x00000000
-#define NV_DMA_ACCESS_RD                                             0x00000100
-#define NV_DMA_ACCESS_WR                                             0x00000200
-#define NV_DMA_ACCESS_RDWR                                           0x00000300
-
-/* NV50:NVC0 */
-#define NV50_DMA_CONF0_ENABLE                                        0x80000000
-#define NV50_DMA_CONF0_PRIV                                          0x00300000
-#define NV50_DMA_CONF0_PRIV_VM                                       0x00000000
-#define NV50_DMA_CONF0_PRIV_US                                       0x00100000
-#define NV50_DMA_CONF0_PRIV__S                                       0x00200000
-#define NV50_DMA_CONF0_PART                                          0x00030000
-#define NV50_DMA_CONF0_PART_VM                                       0x00000000
-#define NV50_DMA_CONF0_PART_256                                      0x00010000
-#define NV50_DMA_CONF0_PART_1KB                                      0x00020000
-#define NV50_DMA_CONF0_COMP                                          0x00000180
-#define NV50_DMA_CONF0_COMP_NONE                                     0x00000000
-#define NV50_DMA_CONF0_COMP_VM                                       0x00000180
-#define NV50_DMA_CONF0_TYPE                                          0x0000007f
-#define NV50_DMA_CONF0_TYPE_LINEAR                                   0x00000000
-#define NV50_DMA_CONF0_TYPE_VM                                       0x0000007f
-
-/* NVC0:NVD9 */
-#define NVC0_DMA_CONF0_ENABLE                                        0x80000000
-#define NVC0_DMA_CONF0_PRIV                                          0x00300000
-#define NVC0_DMA_CONF0_PRIV_VM                                       0x00000000
-#define NVC0_DMA_CONF0_PRIV_US                                       0x00100000
-#define NVC0_DMA_CONF0_PRIV__S                                       0x00200000
-#define NVC0_DMA_CONF0_UNKN /* PART? */                              0x00030000
-#define NVC0_DMA_CONF0_TYPE                                          0x000000ff
-#define NVC0_DMA_CONF0_TYPE_LINEAR                                   0x00000000
-#define NVC0_DMA_CONF0_TYPE_VM                                       0x000000ff
-
-/* NVD9- */
-#define NVD0_DMA_CONF0_ENABLE                                        0x80000000
-#define NVD0_DMA_CONF0_PAGE                                          0x00000400
-#define NVD0_DMA_CONF0_PAGE_LP                                       0x00000000
-#define NVD0_DMA_CONF0_PAGE_SP                                       0x00000400
-#define NVD0_DMA_CONF0_TYPE                                          0x000000ff
-#define NVD0_DMA_CONF0_TYPE_LINEAR                                   0x00000000
-#define NVD0_DMA_CONF0_TYPE_VM                                       0x000000ff
-
-struct nv_dma_class {
-	u32 flags;
-	u32 pad0;
-	u64 start;
-	u64 limit;
-	u32 conf0;
-};
-
 /* Perfmon counter class
  *
  * XXXX: NV_PERFCTR

drivers/gpu/drm/nouveau/core/include/engine/dmaobj.h

@@ -12,7 +12,6 @@ struct nouveau_dmaobj {
 	u32 access;
 	u64 start;
 	u64 limit;
-	u32 conf0;
 };
 
 struct nouveau_dmaeng {

drivers/gpu/drm/nouveau/nouveau_abi16.c

@@ -413,7 +413,7 @@ nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
 	struct {
 		struct nvif_ioctl_v0 ioctl;
 		struct nvif_ioctl_new_v0 new;
-		struct nv_dma_class ctxdma;
+		struct nv_dma_v0 ctxdma;
 	} args = {
 		.ioctl.owner = NVIF_IOCTL_V0_OWNER_ANY,
 		.ioctl.type = NVIF_IOCTL_V0_NEW,
@@ -423,7 +423,7 @@ nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
 		.ioctl.path[0] = NOUVEAU_ABI16_CHAN(info->channel),
 		.new.route = NVDRM_OBJECT_ABI16,
 		.new.handle = info->handle,
-		.new.oclass = NV_DMA_IN_MEMORY_CLASS,
+		.new.oclass = NV_DMA_IN_MEMORY,
 	};
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
@@ -460,17 +460,20 @@ nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
 	args.ctxdma.start = ntfy->node->offset;
 	args.ctxdma.limit = ntfy->node->offset + ntfy->node->length - 1;
 	if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
-		args.ctxdma.flags  = NV_DMA_TARGET_VM | NV_DMA_ACCESS_VM;
+		args.ctxdma.target = NV_DMA_V0_TARGET_VM;
+		args.ctxdma.access = NV_DMA_V0_ACCESS_VM;
 		args.ctxdma.start += chan->ntfy_vma.offset;
 		args.ctxdma.limit += chan->ntfy_vma.offset;
 	} else
 	if (drm->agp.stat == ENABLED) {
-		args.ctxdma.flags  = NV_DMA_TARGET_AGP | NV_DMA_ACCESS_RDWR;
+		args.ctxdma.target = NV_DMA_V0_TARGET_AGP;
+		args.ctxdma.access = NV_DMA_V0_ACCESS_RDWR;
 		args.ctxdma.start += drm->agp.base + chan->ntfy->bo.offset;
 		args.ctxdma.limit += drm->agp.base + chan->ntfy->bo.offset;
 		client->super = true;
 	} else {
-		args.ctxdma.flags  = NV_DMA_TARGET_VM | NV_DMA_ACCESS_RDWR;
+		args.ctxdma.target = NV_DMA_V0_TARGET_VM;
+		args.ctxdma.access = NV_DMA_V0_ACCESS_RDWR;
 		args.ctxdma.start += chan->ntfy->bo.offset;
 		args.ctxdma.limit += chan->ntfy->bo.offset;
 	}

drivers/gpu/drm/nouveau/nouveau_chan.c

@@ -91,7 +91,7 @@ nouveau_channel_prep(struct nouveau_drm *drm, struct nvif_device *device,
 	struct nouveau_instmem *imem = nvkm_instmem(device);
 	struct nouveau_vmmgr *vmm = nvkm_vmmgr(device);
 	struct nouveau_fb *pfb = nvkm_fb(device);
-	struct nv_dma_class args = {};
+	struct nv_dma_v0 args = {};
 	struct nouveau_channel *chan;
 	u32 target;
 	int ret;
@@ -135,7 +135,8 @@ nouveau_channel_prep(struct nouveau_drm *drm, struct nvif_device *device,
 			return ret;
 		}
 
-		args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_VM;
+		args.target = NV_DMA_V0_TARGET_VM;
+		args.access = NV_DMA_V0_ACCESS_VM;
 		args.start = 0;
 		args.limit = cli->vm->vmm->limit - 1;
 	} else
@@ -146,29 +147,33 @@ nouveau_channel_prep(struct nouveau_drm *drm, struct nvif_device *device,
 			 * the framebuffer bar rather than direct vram access..
 			 * nfi why this exists, it came from the -nv ddx.
 			 */
-			args.flags = NV_DMA_TARGET_PCI | NV_DMA_ACCESS_RDWR;
+			args.target = NV_DMA_V0_TARGET_PCI;
+			args.access = NV_DMA_V0_ACCESS_RDWR;
 			args.start = nv_device_resource_start(nvkm_device(device), 1);
 			args.limit = args.start + limit;
 		} else {
-			args.flags = NV_DMA_TARGET_VRAM | NV_DMA_ACCESS_RDWR;
+			args.target = NV_DMA_V0_TARGET_VRAM;
+			args.access = NV_DMA_V0_ACCESS_RDWR;
 			args.start = 0;
 			args.limit = limit;
 		}
 	} else {
 		if (chan->drm->agp.stat == ENABLED) {
-			args.flags = NV_DMA_TARGET_AGP | NV_DMA_ACCESS_RDWR;
+			args.target = NV_DMA_V0_TARGET_AGP;
+			args.access = NV_DMA_V0_ACCESS_RDWR;
 			args.start = chan->drm->agp.base;
 			args.limit = chan->drm->agp.base +
 				     chan->drm->agp.size - 1;
 		} else {
-			args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_RDWR;
+			args.target = NV_DMA_V0_TARGET_VM;
+			args.access = NV_DMA_V0_ACCESS_RDWR;
 			args.start = 0;
 			args.limit = vmm->limit - 1;
 		}
 	}
 
 	ret = nvif_object_init(nvif_object(device), NULL, NVDRM_PUSH |
-			       (handle & 0xffff), NV_DMA_FROM_MEMORY_CLASS,
+			       (handle & 0xffff), NV_DMA_FROM_MEMORY,
 			       &args, sizeof(args), &chan->push.ctxdma);
 	if (ret) {
 		nouveau_channel_del(pchan);
@@ -259,45 +264,50 @@ nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart)
 	struct nouveau_vmmgr *vmm = nvkm_vmmgr(device);
 	struct nouveau_fb *pfb = nvkm_fb(device);
 	struct nouveau_software_chan *swch;
-	struct nv_dma_class args = {};
+	struct nv_dma_v0 args = {};
 	int ret, i;
 
 	/* allocate dma objects to cover all allowed vram, and gart */
 	if (device->info.family < NV_DEVICE_INFO_V0_FERMI) {
 		if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
-			args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_VM;
+			args.target = NV_DMA_V0_TARGET_VM;
+			args.access = NV_DMA_V0_ACCESS_VM;
 			args.start = 0;
 			args.limit = cli->vm->vmm->limit - 1;
 		} else {
-			args.flags = NV_DMA_TARGET_VRAM | NV_DMA_ACCESS_RDWR;
+			args.target = NV_DMA_V0_TARGET_VRAM;
+			args.access = NV_DMA_V0_ACCESS_RDWR;
 			args.start = 0;
 			args.limit = pfb->ram->size - imem->reserved - 1;
 		}
 
 		ret = nvif_object_init(chan->object, NULL, vram,
-				       NV_DMA_IN_MEMORY_CLASS, &args,
+				       NV_DMA_IN_MEMORY, &args,
 				       sizeof(args), &chan->vram);
 		if (ret)
 			return ret;
 
 		if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
-			args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_VM;
+			args.target = NV_DMA_V0_TARGET_VM;
+			args.access = NV_DMA_V0_ACCESS_VM;
 			args.start = 0;
 			args.limit = cli->vm->vmm->limit - 1;
 		} else
 		if (chan->drm->agp.stat == ENABLED) {
-			args.flags = NV_DMA_TARGET_AGP | NV_DMA_ACCESS_RDWR;
+			args.target = NV_DMA_V0_TARGET_AGP;
+			args.access = NV_DMA_V0_ACCESS_RDWR;
 			args.start = chan->drm->agp.base;
 			args.limit = chan->drm->agp.base +
 				     chan->drm->agp.size - 1;
 		} else {
-			args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_RDWR;
+			args.target = NV_DMA_V0_TARGET_VM;
+			args.access = NV_DMA_V0_ACCESS_RDWR;
 			args.start = 0;
 			args.limit = vmm->limit - 1;
 		}
 
 		ret = nvif_object_init(chan->object, NULL, gart,
-				       NV_DMA_IN_MEMORY_CLASS, &args,
+				       NV_DMA_IN_MEMORY, &args,
 				       sizeof(args), &chan->gart);
 		if (ret)
 			return ret;

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -257,13 +257,13 @@ nouveau_accel_init(struct nouveau_drm *drm)
 		}
 
 		ret = nvif_object_init(drm->channel->object, NULL, NvNotify0,
-				       NV_DMA_IN_MEMORY_CLASS,
-				       &(struct nv_dma_class) {
-						.flags = NV_DMA_TARGET_VRAM |
-							 NV_DMA_ACCESS_RDWR,
+				       NV_DMA_IN_MEMORY,
+				       &(struct nv_dma_v0) {
+						.target = NV_DMA_V0_TARGET_VRAM,
+						.access = NV_DMA_V0_ACCESS_RDWR,
 						.start = drm->notify->addr,
 						.limit = drm->notify->addr + 31
-				       }, sizeof(struct nv_dma_class),
+				       }, sizeof(struct nv_dma_v0),
 				       &drm->ntfy);
 		if (ret) {
 			nouveau_accel_fini(drm);

drivers/gpu/drm/nouveau/nv17_fence.c

@@ -89,14 +89,13 @@ nv17_fence_context_new(struct nouveau_channel *chan)
 	fctx->base.read = nv10_fence_read;
 	fctx->base.sync = nv17_fence_sync;
 
-	ret = nvif_object_init(chan->object, NULL, NvSema,
-				NV_DMA_FROM_MEMORY_CLASS,
-			       &(struct nv_dma_class) {
-					.flags = NV_DMA_TARGET_VRAM |
-						 NV_DMA_ACCESS_RDWR,
+	ret = nvif_object_init(chan->object, NULL, NvSema, NV_DMA_FROM_MEMORY,
+			       &(struct nv_dma_v0) {
+					.target = NV_DMA_V0_TARGET_VRAM,
+					.access = NV_DMA_V0_ACCESS_RDWR,
 					.start = start,
 					.limit = limit,
-			       }, sizeof(struct nv_dma_class),
+			       }, sizeof(struct nv_dma_v0),
 			       &fctx->sema);
 	if (ret)
 		nv10_fence_context_del(chan);

drivers/gpu/drm/nouveau/nv50_display.c

@@ -160,13 +160,13 @@ nv50_dmac_create(struct nvif_object *disp, u32 bclass, u8 head,
 		return -ENOMEM;
 
 	ret = nvif_object_init(nvif_object(nvif_device(disp)), NULL, handle,
-			       NV_DMA_FROM_MEMORY_CLASS,
-			       &(struct nv_dma_class) {
-					.flags = NV_DMA_TARGET_PCI_US |
-						 NV_DMA_ACCESS_RD,
+			       NV_DMA_FROM_MEMORY,
+			       &(struct nv_dma_v0) {
+					.target = NV_DMA_V0_TARGET_PCI_US,
+					.access = NV_DMA_V0_ACCESS_RD,
 					.start = dmac->handle + 0x0000,
 					.limit = dmac->handle + 0x0fff,
-			       }, sizeof(struct nv_dma_class), &pushbuf);
+			       }, sizeof(struct nv_dma_v0), &pushbuf);
 	if (ret)
 		return ret;
 
@@ -176,25 +176,25 @@ nv50_dmac_create(struct nvif_object *disp, u32 bclass, u8 head,
 		return ret;
 
 	ret = nvif_object_init(&dmac->base.user, NULL, 0xf0000000,
-			       NV_DMA_IN_MEMORY_CLASS,
-			       &(struct nv_dma_class) {
-					.flags = NV_DMA_TARGET_VRAM |
-						 NV_DMA_ACCESS_RDWR,
+			       NV_DMA_IN_MEMORY,
+			       &(struct nv_dma_v0) {
+					.target = NV_DMA_V0_TARGET_VRAM,
+					.access = NV_DMA_V0_ACCESS_RDWR,
 					.start = syncbuf + 0x0000,
 					.limit = syncbuf + 0x0fff,
-			       }, sizeof(struct nv_dma_class),
+			       }, sizeof(struct nv_dma_v0),
 			       &dmac->sync);
 	if (ret)
 		return ret;
 
 	ret = nvif_object_init(&dmac->base.user, NULL, 0xf0000001,
-			       NV_DMA_IN_MEMORY_CLASS,
-			       &(struct nv_dma_class) {
-					.flags = NV_DMA_TARGET_VRAM |
-						 NV_DMA_ACCESS_RDWR,
+			       NV_DMA_IN_MEMORY,
+			       &(struct nv_dma_v0) {
+					.target = NV_DMA_V0_TARGET_VRAM,
+					.access = NV_DMA_V0_ACCESS_RDWR,
 					.start = 0,
 					.limit = pfb->ram->size - 1,
-			       }, sizeof(struct nv_dma_class),
+			       }, sizeof(struct nv_dma_v0),
 			       &dmac->vram);
 	if (ret)
 		return ret;
@@ -2073,9 +2073,17 @@ nv50_fbdma_init(struct drm_device *dev, u32 name, u64 offset, u64 length, u8 kin
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nv50_disp *disp = nv50_disp(dev);
 	struct nv50_mast *mast = nv50_mast(dev);
-	struct nv_dma_class args;
+	struct __attribute__ ((packed)) {
+		struct nv_dma_v0 base;
+		union {
+			struct nv50_dma_v0 nv50;
+			struct gf100_dma_v0 gf100;
+			struct gf110_dma_v0 gf110;
+		};
+	} args = {};
 	struct nv50_fbdma *fbdma;
 	struct drm_crtc *crtc;
+	u32 size = sizeof(args.base);
 	int ret;
 
 	list_for_each_entry(fbdma, &disp->fbdma, head) {
@@ -2088,31 +2096,33 @@ nv50_fbdma_init(struct drm_device *dev, u32 name, u64 offset, u64 length, u8 kin
 		return -ENOMEM;
 	list_add(&fbdma->head, &disp->fbdma);
 
-	args.flags = NV_DMA_TARGET_VRAM | NV_DMA_ACCESS_RDWR;
-	args.start = offset;
-	args.limit = offset + length - 1;
-	args.conf0 = kind;
+	args.base.target = NV_DMA_V0_TARGET_VRAM;
+	args.base.access = NV_DMA_V0_ACCESS_RDWR;
+	args.base.start = offset;
+	args.base.limit = offset + length - 1;
 
 	if (drm->device.info.chipset < 0x80) {
-		args.conf0  = NV50_DMA_CONF0_ENABLE;
-		args.conf0 |= NV50_DMA_CONF0_PART_256;
+		args.nv50.part = NV50_DMA_V0_PART_256;
+		size += sizeof(args.nv50);
 	} else
 	if (drm->device.info.chipset < 0xc0) {
-		args.conf0 |= NV50_DMA_CONF0_ENABLE;
-		args.conf0 |= NV50_DMA_CONF0_PART_256;
+		args.nv50.part = NV50_DMA_V0_PART_256;
+		args.nv50.kind = kind;
+		size += sizeof(args.nv50);
 	} else
 	if (drm->device.info.chipset < 0xd0) {
-		args.conf0 |= NVC0_DMA_CONF0_ENABLE;
+		args.gf100.kind = kind;
+		size += sizeof(args.gf100);
 	} else {
-		args.conf0 |= NVD0_DMA_CONF0_ENABLE;
-		args.conf0 |= NVD0_DMA_CONF0_PAGE_LP;
+		args.gf110.page = GF110_DMA_V0_PAGE_LP;
+		args.gf110.kind = kind;
+		size += sizeof(args.gf110);
 	}
 
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct nv50_head *head = nv50_head(crtc);
 		int ret = nvif_object_init(&head->sync.base.base.user, NULL,
-					    name, NV_DMA_IN_MEMORY_CLASS,
-					   &args, sizeof(args),
+					    name, NV_DMA_IN_MEMORY, &args, size,
 					   &fbdma->base[head->base.index]);
 		if (ret) {
 			nv50_fbdma_fini(fbdma);
@@ -2121,7 +2131,7 @@ nv50_fbdma_init(struct drm_device *dev, u32 name, u64 offset, u64 length, u8 kin
 	}
 
 	ret = nvif_object_init(&mast->base.base.user, NULL, name,
-				NV_DMA_IN_MEMORY_CLASS, &args, sizeof(args),
+				NV_DMA_IN_MEMORY, &args, size,
 			       &fbdma->core);
 	if (ret) {
 		nv50_fbdma_fini(fbdma);

drivers/gpu/drm/nouveau/nv50_fence.c

@@ -51,14 +51,13 @@ nv50_fence_context_new(struct nouveau_channel *chan)
 	fctx->base.read = nv10_fence_read;
 	fctx->base.sync = nv17_fence_sync;
 
-	ret = nvif_object_init(chan->object, NULL, NvSema,
-				NV_DMA_IN_MEMORY_CLASS,
-			       &(struct nv_dma_class) {
-					.flags = NV_DMA_TARGET_VRAM |
-						 NV_DMA_ACCESS_RDWR,
+	ret = nvif_object_init(chan->object, NULL, NvSema, NV_DMA_IN_MEMORY,
+			       &(struct nv_dma_v0) {
+					.target = NV_DMA_V0_TARGET_VRAM,
+					.access = NV_DMA_V0_ACCESS_RDWR,
 					.start = start,
 					.limit = limit,
-			       }, sizeof(struct nv_dma_class),
+			       }, sizeof(struct nv_dma_v0),
 			       &fctx->sema);
 
 	/* dma objects for display sync channel semaphore blocks */
@@ -68,13 +67,12 @@ nv50_fence_context_new(struct nouveau_channel *chan)
 		u32 limit = start + bo->bo.mem.size - 1;
 
 		ret = nvif_object_init(chan->object, NULL, NvEvoSema0 + i,
-					NV_DMA_IN_MEMORY_CLASS,
-				       &(struct nv_dma_class) {
-						.flags = NV_DMA_TARGET_VRAM |
-							 NV_DMA_ACCESS_RDWR,
+				       NV_DMA_IN_MEMORY, &(struct nv_dma_v0) {
+						.target = NV_DMA_V0_TARGET_VRAM,
+						.access = NV_DMA_V0_ACCESS_RDWR,
 						.start = start,
 						.limit = limit,
-				       }, sizeof(struct nv_dma_class),
+				       }, sizeof(struct nv_dma_v0),
 				       &fctx->head[i]);
 	}
 

drivers/gpu/drm/nouveau/nvif/class.h

@@ -8,6 +8,10 @@
 /* the below match nvidia-assigned (either in hw, or sw) class numbers */
 #define NV_DEVICE                                                    0x00000080
 
+#define NV_DMA_FROM_MEMORY                                           0x00000002
+#define NV_DMA_TO_MEMORY                                             0x00000003
+#define NV_DMA_IN_MEMORY                                             0x0000003d
+
 
 /*******************************************************************************
  * client
@@ -79,4 +83,72 @@ struct nv_device_info_v0 {
 	__u64 ram_user;
 };
 
+
+/*******************************************************************************
+ * context dma
+ ******************************************************************************/
+
+struct nv_dma_v0 {
+	__u8  version;
+#define NV_DMA_V0_TARGET_VM                                                0x00
+#define NV_DMA_V0_TARGET_VRAM                                              0x01
+#define NV_DMA_V0_TARGET_PCI                                               0x02
+#define NV_DMA_V0_TARGET_PCI_US                                            0x03
+#define NV_DMA_V0_TARGET_AGP                                               0x04
+	__u8  target;
+#define NV_DMA_V0_ACCESS_VM                                                0x00
+#define NV_DMA_V0_ACCESS_RD                                                0x01
+#define NV_DMA_V0_ACCESS_WR                                                0x02
+#define NV_DMA_V0_ACCESS_RDWR                 (NV_DMA_V0_ACCESS_RD | NV_DMA_V0_ACCESS_WR)
+	__u8  access;
+	__u8  pad03[5];
+	__u64 start;
+	__u64 limit;
+	/* ... chipset-specific class data */
+};
+
+struct nv50_dma_v0 {
+	__u8  version;
+#define NV50_DMA_V0_PRIV_VM                                                0x00
+#define NV50_DMA_V0_PRIV_US                                                0x01
+#define NV50_DMA_V0_PRIV__S                                                0x02
+	__u8  priv;
+#define NV50_DMA_V0_PART_VM                                                0x00
+#define NV50_DMA_V0_PART_256                                               0x01
+#define NV50_DMA_V0_PART_1KB                                               0x02
+	__u8  part;
+#define NV50_DMA_V0_COMP_NONE                                              0x00
+#define NV50_DMA_V0_COMP_1                                                 0x01
+#define NV50_DMA_V0_COMP_2                                                 0x02
+#define NV50_DMA_V0_COMP_VM                                                0x03
+	__u8  comp;
+#define NV50_DMA_V0_KIND_PITCH                                             0x00
+#define NV50_DMA_V0_KIND_VM                                                0x7f
+	__u8  kind;
+	__u8  pad05[3];
+};
+
+struct gf100_dma_v0 {
+	__u8  version;
+#define GF100_DMA_V0_PRIV_VM                                               0x00
+#define GF100_DMA_V0_PRIV_US                                               0x01
+#define GF100_DMA_V0_PRIV__S                                               0x02
+	__u8  priv;
+#define GF100_DMA_V0_KIND_PITCH                                            0x00
+#define GF100_DMA_V0_KIND_VM                                               0xff
+	__u8  kind;
+	__u8  pad03[5];
+};
+
+struct gf110_dma_v0 {
+	__u8  version;
+#define GF110_DMA_V0_PAGE_LP                                               0x00
+#define GF110_DMA_V0_PAGE_SP                                               0x01
+	__u8  page;
+#define GF110_DMA_V0_KIND_PITCH                                            0x00
+#define GF110_DMA_V0_KIND_VM                                               0xff
+	__u8  kind;
+	__u8  pad03[5];
+};
+
 #endif