drm/nouveau/mmu/nv50,g84: implement vmm on top of new base

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

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

@@ -16,6 +16,7 @@
 
 #define NVIF_CLASS_VMM                               /* if000c.h */  0x8000000c
 #define NVIF_CLASS_VMM_NV04                          /* if000d.h */  0x8000000d
+#define NVIF_CLASS_VMM_NV50                          /* if500d.h */  0x8000500d
 
 /* the below match nvidia-assigned (either in hw, or sw) class numbers */
 #define NV_NULL_CLASS                                                0x00000030

drivers/gpu/drm/nouveau/include/nvif/if500d.h

+#ifndef __NVIF_IF500D_H__
+#define __NVIF_IF500D_H__
+#include "if000c.h"
+
+struct nv50_vmm_vn {
+	/* nvif_vmm_vX ... */
+};
+#endif

drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h

@@ -36,7 +36,6 @@ struct nvkm_vm {
 	u64 limit;
 
 	struct nvkm_vmm_pt *pd;
-	u16 pd_offset;
 	struct list_head join;
 
 	struct nvkm_mm mm;

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/Kbuild

@@ -16,3 +16,4 @@ nvkm-y += nvkm/subdev/mmu/vmm.o
 nvkm-y += nvkm/subdev/mmu/vmmnv04.o
 nvkm-y += nvkm/subdev/mmu/vmmnv41.o
 nvkm-y += nvkm/subdev/mmu/vmmnv44.o
+nvkm-y += nvkm/subdev/mmu/vmmnv50.o

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c

@@ -727,7 +727,6 @@ nvkm_vm_del(struct kref *kref)
 
 	nvkm_mm_fini(&vm->mm);
 	vfree(vm->pgt);
-
 	if (vm->func)
 		nvkm_vmm_dtor(vm);
 	kfree(vm);

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/g84.c

@@ -19,7 +19,9 @@
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  */
-#include "priv.h"
+#include "vmm.h"
+
+#include <nvif/class.h>
 
 static const struct nvkm_mmu_func
 g84_mmu = {
@@ -34,6 +36,7 @@ g84_mmu = {
 	.map_sg = nv50_vm_map_sg,
 	.unmap = nv50_vm_unmap,
 	.flush = nv50_vm_flush,
+	.vmm = {{ -1, -1, NVIF_CLASS_VMM_NV50}, nv50_vmm_new, false, 0x0200 },
 };
 
 int

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv50.c

@@ -21,13 +21,15 @@
  *
  * Authors: Ben Skeggs
  */
-#include "priv.h"
+#include "vmm.h"
 
 #include <core/gpuobj.h>
 #include <subdev/fb.h>
 #include <subdev/timer.h>
 #include <engine/gr.h>
 
+#include <nvif/class.h>
+
 void
 nv50_vm_map_pgt(struct nvkm_gpuobj *pgd, u32 pde, struct nvkm_memory *pgt[2])
 {
@@ -205,7 +207,6 @@ nv50_vm_create(struct nvkm_mmu *mmu, u64 offset, u64 length, u64 mm_offset,
 	u32 block = (1 << (mmu->func->pgt_bits + 12));
 	if (block > length)
 		block = length;
-
 	return nvkm_vm_create(mmu, offset, length, mm_offset, block, key, pvm);
 }
 
@@ -222,6 +223,7 @@ nv50_mmu = {
 	.map_sg = nv50_vm_map_sg,
 	.unmap = nv50_vm_unmap,
 	.flush = nv50_vm_flush,
+	.vmm = {{ -1, -1, NVIF_CLASS_VMM_NV50}, nv50_vmm_new, false, 0x1400 },
 };
 
 int

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/priv.h

@@ -38,6 +38,7 @@ struct nvkm_mmu_func {
 			    void *argv, u32 argc, struct lock_class_key *,
 			    const char *name, struct nvkm_vmm **);
 		bool global;
+		u32 pd_offset;
 	} vmm;
 };
 

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.h

@@ -94,6 +94,11 @@ struct nvkm_vmm_func {
 	const struct nvkm_vmm_page page[];
 };
 
+struct nvkm_vmm_join {
+	struct nvkm_memory *inst;
+	struct list_head head;
+};
+
 int nvkm_vmm_new_(const struct nvkm_vmm_func *, struct nvkm_mmu *,
 		  u32 pd_header, u64 addr, u64 size, struct lock_class_key *,
 		  const char *name, struct nvkm_vmm **);
@@ -112,4 +117,8 @@ int nv41_vmm_new(struct nvkm_mmu *, u64, u64, void *, u32,
 		 struct lock_class_key *, const char *, struct nvkm_vmm **);
 int nv44_vmm_new(struct nvkm_mmu *, u64, u64, void *, u32,
 		 struct lock_class_key *, const char *, struct nvkm_vmm **);
+int nv50_vmm_new(struct nvkm_mmu *, u64, u64, void *, u32,
+		 struct lock_class_key *, const char *, struct nvkm_vmm **);
+int g84_vmm_new(struct nvkm_mmu *, u64, u64, void *, u32,
+		struct lock_class_key *, const char *, struct nvkm_vmm **);
 #endif

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv50.c

+/*
+ * Copyright 2017 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.
+ */
+#include "vmm.h"
+
+#include <nvif/if500d.h>
+#include <nvif/unpack.h>
+
+static const struct nvkm_vmm_desc_func
+nv50_vmm_pgt = {
+};
+
+static const struct nvkm_vmm_desc_func
+nv50_vmm_pgd = {
+};
+
+static const struct nvkm_vmm_desc
+nv50_vmm_desc_12[] = {
+	{ PGT, 17, 8, 0x1000, &nv50_vmm_pgt },
+	{ PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
+	{}
+};
+
+static const struct nvkm_vmm_desc
+nv50_vmm_desc_16[] = {
+	{ PGT, 13, 8, 0x1000, &nv50_vmm_pgt },
+	{ PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
+	{}
+};
+
+static void
+nv50_vmm_part(struct nvkm_vmm *vmm, struct nvkm_memory *inst)
+{
+	struct nvkm_vmm_join *join;
+
+	list_for_each_entry(join, &vmm->join, head) {
+		if (join->inst == inst) {
+			list_del(&join->head);
+			kfree(join);
+			break;
+		}
+	}
+}
+
+static int
+nv50_vmm_join(struct nvkm_vmm *vmm, struct nvkm_memory *inst)
+{
+	struct nvkm_vmm_join *join;
+
+	if (!(join = kmalloc(sizeof(*join), GFP_KERNEL)))
+		return -ENOMEM;
+	join->inst = inst;
+	list_add_tail(&join->head, &vmm->join);
+	return 0;
+}
+
+static const struct nvkm_vmm_func
+nv50_vmm = {
+	.join = nv50_vmm_join,
+	.part = nv50_vmm_part,
+	.page_block = 1 << 29,
+	.page = {
+		{ 16, &nv50_vmm_desc_16[0], NVKM_VMM_PAGE_xVxC },
+		{ 12, &nv50_vmm_desc_12[0], NVKM_VMM_PAGE_xVHx },
+		{}
+	}
+};
+
+int
+nv50_vmm_new(struct nvkm_mmu *mmu, u64 addr, u64 size, void *argv, u32 argc,
+	     struct lock_class_key *key, const char *name,
+	     struct nvkm_vmm **pvmm)
+{
+	return nv04_vmm_new_(&nv50_vmm, mmu, 0, addr, size,
+			     argv, argc, key, name, pvmm);
+}