drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv50.c - linux - Git at Google

 /*
  * 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 <subdev/fb.h>
 #include <subdev/timer.h>
 #include <engine/gr.h>

 #include <nvif/if500d.h>
 #include <nvif/unpack.h>

 static inline void
 nv50_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
 {
 	u64 next = addr + map->type, data;
 	u32 pten;
 	int log2blk;

 	map->type += ptes * map->ctag;

 	while (ptes) {
 		for (log2blk = 7; log2blk >= 0; log2blk--) {
 			pten = 1 << log2blk;
 			if (ptes >= pten && IS_ALIGNED(ptei, pten))
 				break;
 		}

 		data  = next | (log2blk << 7);
 		next += pten * map->next;
 		ptes -= pten;

 		while (pten--)
 			VMM_WO064(pt, vmm, ptei++ * 8, data);
 	}
 }

 static void
 nv50_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
 {
 	VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
 }

 static void
 nv50_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
 {
 	if (map->page->shift == PAGE_SHIFT) {
 		VMM_SPAM(vmm, "DMAA %08x %08x PTE(s)", ptei, ptes);
 		nvkm_kmap(pt->memory);
 		while (ptes--) {
 			const u64 data = *map->dma++ + map->type;
 			VMM_WO064(pt, vmm, ptei++ * 8, data);
 			map->type += map->ctag;
 		}
 		nvkm_done(pt->memory);
 		return;
 	}

 	VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
 }

 static void
 nv50_vmm_pgt_mem(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
 {
 	VMM_MAP_ITER_MEM(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
 }

 static void
 nv50_vmm_pgt_unmap(struct nvkm_vmm *vmm,
 		   struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
 {
 	VMM_FO064(pt, vmm, ptei * 8, 0ULL, ptes);
 }

 static const struct nvkm_vmm_desc_func
 nv50_vmm_pgt = {
 	.unmap = nv50_vmm_pgt_unmap,
 	.mem = nv50_vmm_pgt_mem,
 	.dma = nv50_vmm_pgt_dma,
 	.sgl = nv50_vmm_pgt_sgl,
 };

 static bool
 nv50_vmm_pde(struct nvkm_vmm *vmm, struct nvkm_vmm_pt *pgt, u64 *pdata)
 {
 	struct nvkm_mmu_pt *pt;
 	u64 data = 0xdeadcafe00000000ULL;
 	if (pgt && (pt = pgt->pt[0])) {
 		switch (pgt->page) {
 		case 16: data = 0x00000001; break;
 		case 12: data = 0x00000003;
 			switch (nvkm_memory_size(pt->memory)) {
 			case 0x100000: data |= 0x00000000; break;
 			case 0x040000: data |= 0x00000020; break;
 			case 0x020000: data |= 0x00000040; break;
 			case 0x010000: data |= 0x00000060; break;
 			default:
 				WARN_ON(1);
 				return false;
 			}
 			break;
 		default:
 			WARN_ON(1);
 			return false;
 		}

 		switch (nvkm_memory_target(pt->memory)) {
 		case NVKM_MEM_TARGET_VRAM: data |= 0x00000000; break;
 		case NVKM_MEM_TARGET_HOST: data |= 0x00000008; break;
 		case NVKM_MEM_TARGET_NCOH: data |= 0x0000000c; break;
 		default:
 			WARN_ON(1);
 			return false;
 		}

 		data |= pt->addr;
 	}
 	*pdata = data;
 	return true;
 }

 static void
 nv50_vmm_pgd_pde(struct nvkm_vmm *vmm, struct nvkm_vmm_pt *pgd, u32 pdei)
 {
 	struct nvkm_vmm_join *join;
 	u32 pdeo = vmm->mmu->func->vmm.pd_offset + (pdei * 8);
 	u64 data;

 	if (!nv50_vmm_pde(vmm, pgd->pde[pdei], &data))
 		return;

 	list_for_each_entry(join, &vmm->join, head) {
 		nvkm_kmap(join->inst);
 		nvkm_wo64(join->inst, pdeo, data);
 		nvkm_done(join->inst);
 	}
 }

 static const struct nvkm_vmm_desc_func
 nv50_vmm_pgd = {
 	.pde = nv50_vmm_pgd_pde,
 };

 const struct nvkm_vmm_desc
 nv50_vmm_desc_12[] = {
 	{ PGT, 17, 8, 0x1000, &nv50_vmm_pgt },
 	{ PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
 	{}
 };

 const struct nvkm_vmm_desc
 nv50_vmm_desc_16[] = {
 	{ PGT, 13, 8, 0x1000, &nv50_vmm_pgt },
 	{ PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
 	{}
 };

 void
 nv50_vmm_flush(struct nvkm_vmm *vmm, int level)
 {
 	struct nvkm_subdev *subdev = &vmm->mmu->subdev;
 	struct nvkm_device *device = subdev->device;
 	int i, id;

 	mutex_lock(&subdev->mutex);
 	for (i = 0; i < NVKM_SUBDEV_NR; i++) {
 		if (!atomic_read(&vmm->engref[i]))
 			continue;

 		/* unfortunate hw bug workaround... */
 		if (i == NVKM_ENGINE_GR && device->gr) {
 			int ret = nvkm_gr_tlb_flush(device->gr);
 			if (ret != -ENODEV)
 				continue;
 		}

 		switch (i) {
 		case NVKM_ENGINE_GR    : id = 0x00; break;
 		case NVKM_ENGINE_VP    :
 		case NVKM_ENGINE_MSPDEC: id = 0x01; break;
 		case NVKM_SUBDEV_BAR   : id = 0x06; break;
 		case NVKM_ENGINE_MSPPP :
 		case NVKM_ENGINE_MPEG  : id = 0x08; break;
 		case NVKM_ENGINE_BSP   :
 		case NVKM_ENGINE_MSVLD : id = 0x09; break;
 		case NVKM_ENGINE_CIPHER:
 		case NVKM_ENGINE_SEC   : id = 0x0a; break;
 		case NVKM_ENGINE_CE0   : id = 0x0d; break;
 		default:
 			continue;
 		}

 		nvkm_wr32(device, 0x100c80, (id << 16) | 1);
 		if (nvkm_msec(device, 2000,
 			if (!(nvkm_rd32(device, 0x100c80) & 0x00000001))
 				break;
 		) < 0)
 			nvkm_error(subdev, "%s mmu invalidate timeout\n",
 				   nvkm_subdev_name[i]);
 	}
 	mutex_unlock(&subdev->mutex);
 }

 int
 nv50_vmm_valid(struct nvkm_vmm *vmm, void *argv, u32 argc,
 	       struct nvkm_vmm_map *map)
 {
 	const struct nvkm_vmm_page *page = map->page;
 	union {
 		struct nv50_vmm_map_vn vn;
 		struct nv50_vmm_map_v0 v0;
 	} *args = argv;
 	struct nvkm_device *device = vmm->mmu->subdev.device;
 	struct nvkm_ram *ram = device->fb->ram;
 	struct nvkm_memory *memory = map->memory;
 	u8  aper, kind, comp, priv, ro;
 	int kindn, ret = -ENOSYS;
 	const u8 *kindm;

 	map->type = map->ctag = 0;
 	map->next = 1 << page->shift;

 	if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
 		ro   = !!args->v0.ro;
 		priv = !!args->v0.priv;
 		kind = args->v0.kind & 0x7f;
 		comp = args->v0.comp & 0x03;
 	} else
 	if (!(ret = nvif_unvers(ret, &argv, &argc, args->vn))) {
 		ro   = 0;
 		priv = 0;
 		kind = 0x00;
 		comp = 0;
 	} else {
 		VMM_DEBUG(vmm, "args");
 		return ret;
 	}

 	switch (nvkm_memory_target(memory)) {
 	case NVKM_MEM_TARGET_VRAM:
 		if (ram->stolen) {
 			map->type |= ram->stolen;
 			aper = 3;
 		} else {
 			aper = 0;
 		}
 		break;
 	case NVKM_MEM_TARGET_HOST:
 		aper = 2;
 		break;
 	case NVKM_MEM_TARGET_NCOH:
 		aper = 3;
 		break;
 	default:
 		WARN_ON(1);
 		return -EINVAL;
 	}

 	kindm = vmm->mmu->func->kind(vmm->mmu, &kindn);
 	if (kind >= kindn || kindm[kind] == 0x7f) {
 		VMM_DEBUG(vmm, "kind %02x", kind);
 		return -EINVAL;
 	}

 	if (map->mem && map->mem->type != kindm[kind]) {
 		VMM_DEBUG(vmm, "kind %02x bankswz: %d %d", kind,
 			  kindm[kind], map->mem->type);
 		return -EINVAL;
 	}

 	if (comp) {
 		u32 tags = (nvkm_memory_size(memory) >> 16) * comp;
 		if (aper != 0 || !(page->type & NVKM_VMM_PAGE_COMP)) {
 			VMM_DEBUG(vmm, "comp %d %02x", aper, page->type);
 			return -EINVAL;
 		}

 		ret = nvkm_memory_tags_get(memory, device, tags, NULL,
 					   &map->tags);
 		if (ret) {
 			VMM_DEBUG(vmm, "comp %d", ret);
 			return ret;
 		}

 		if (map->tags->mn) {
 			u32 tags = map->tags->mn->offset + (map->offset >> 16);
 			map->ctag |= (u64)comp << 49;
 			map->type |= (u64)comp << 47;
 			map->type |= (u64)tags << 49;
 			map->next |= map->ctag;
 		}
 	}

 	map->type |= BIT(0); /* Valid. */
 	map->type |= (u64)ro << 3;
 	map->type |= (u64)aper << 4;
 	map->type |= (u64)priv << 6;
 	map->type |= (u64)kind << 40;
 	return 0;
 }

 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;
 		}
 	}
 }

 int
 nv50_vmm_join(struct nvkm_vmm *vmm, struct nvkm_memory *inst)
 {
 	const u32 pd_offset = vmm->mmu->func->vmm.pd_offset;
 	struct nvkm_vmm_join *join;
 	int ret = 0;
 	u64 data;
 	u32 pdei;

 	if (!(join = kmalloc(sizeof(*join), GFP_KERNEL)))
 		return -ENOMEM;
 	join->inst = inst;
 	list_add_tail(&join->head, &vmm->join);

 	nvkm_kmap(join->inst);
 	for (pdei = vmm->start >> 29; pdei <= (vmm->limit - 1) >> 29; pdei++) {
 		if (!nv50_vmm_pde(vmm, vmm->pd->pde[pdei], &data)) {
 			ret = -EINVAL;
 			break;
 		}
 		nvkm_wo64(join->inst, pd_offset + (pdei * 8), data);
 	}
 	nvkm_done(join->inst);
 	return ret;
 }

 static const struct nvkm_vmm_func
 nv50_vmm = {
 	.join = nv50_vmm_join,
 	.part = nv50_vmm_part,
 	.valid = nv50_vmm_valid,
 	.flush = nv50_vmm_flush,
 	.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, bool managed, 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, managed, addr, size,
 			     argv, argc, key, name, pvmm);
 }
	/*
	* 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 <subdev/fb.h>
	#include <subdev/timer.h>
	#include <engine/gr.h>

	#include <nvif/if500d.h>
	#include <nvif/unpack.h>

	static inline void
	nv50_vmm_pgt_pte(struct nvkm_vmm vmm, struct nvkm_mmu_pt pt,
	u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
	{
	u64 next = addr + map->type, data;
	u32 pten;
	int log2blk;

	map->type += ptes * map->ctag;

	while (ptes) {
	for (log2blk = 7; log2blk >= 0; log2blk--) {
	pten = 1 << log2blk;
	if (ptes >= pten && IS_ALIGNED(ptei, pten))
	break;
	}

	data = next \| (log2blk << 7);
	next += pten * map->next;
	ptes -= pten;

	while (pten--)
	VMM_WO064(pt, vmm, ptei++ * 8, data);
	}
	}

	static void
	nv50_vmm_pgt_sgl(struct nvkm_vmm vmm, struct nvkm_mmu_pt pt,
	u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
	{
	VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
	}

	static void
	nv50_vmm_pgt_dma(struct nvkm_vmm vmm, struct nvkm_mmu_pt pt,
	u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
	{
	if (map->page->shift == PAGE_SHIFT) {
	VMM_SPAM(vmm, "DMAA %08x %08x PTE(s)", ptei, ptes);
	nvkm_kmap(pt->memory);
	while (ptes--) {
	const u64 data = *map->dma++ + map->type;
	VMM_WO064(pt, vmm, ptei++ * 8, data);
	map->type += map->ctag;
	}
	nvkm_done(pt->memory);
	return;
	}

	VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
	}

	static void
	nv50_vmm_pgt_mem(struct nvkm_vmm vmm, struct nvkm_mmu_pt pt,
	u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
	{
	VMM_MAP_ITER_MEM(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
	}

	static void
	nv50_vmm_pgt_unmap(struct nvkm_vmm *vmm,
	struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
	{
	VMM_FO064(pt, vmm, ptei * 8, 0ULL, ptes);
	}

	static const struct nvkm_vmm_desc_func
	nv50_vmm_pgt = {
	.unmap = nv50_vmm_pgt_unmap,
	.mem = nv50_vmm_pgt_mem,
	.dma = nv50_vmm_pgt_dma,
	.sgl = nv50_vmm_pgt_sgl,
	};

	static bool
	nv50_vmm_pde(struct nvkm_vmm vmm, struct nvkm_vmm_pt pgt, u64 *pdata)
	{
	struct nvkm_mmu_pt *pt;
	u64 data = 0xdeadcafe00000000ULL;
	if (pgt && (pt = pgt->pt[0])) {
	switch (pgt->page) {
	case 16: data = 0x00000001; break;
	case 12: data = 0x00000003;
	switch (nvkm_memory_size(pt->memory)) {
	case 0x100000: data \|= 0x00000000; break;
	case 0x040000: data \|= 0x00000020; break;
	case 0x020000: data \|= 0x00000040; break;
	case 0x010000: data \|= 0x00000060; break;
	default:
	WARN_ON(1);
	return false;
	}
	break;
	default:
	WARN_ON(1);
	return false;
	}

	switch (nvkm_memory_target(pt->memory)) {
	case NVKM_MEM_TARGET_VRAM: data \|= 0x00000000; break;
	case NVKM_MEM_TARGET_HOST: data \|= 0x00000008; break;
	case NVKM_MEM_TARGET_NCOH: data \|= 0x0000000c; break;
	default:
	WARN_ON(1);
	return false;
	}

	data \|= pt->addr;
	}
	*pdata = data;
	return true;
	}

	static void
	nv50_vmm_pgd_pde(struct nvkm_vmm vmm, struct nvkm_vmm_pt pgd, u32 pdei)
	{
	struct nvkm_vmm_join *join;
	u32 pdeo = vmm->mmu->func->vmm.pd_offset + (pdei * 8);
	u64 data;

	if (!nv50_vmm_pde(vmm, pgd->pde[pdei], &data))
	return;

	list_for_each_entry(join, &vmm->join, head) {
	nvkm_kmap(join->inst);
	nvkm_wo64(join->inst, pdeo, data);
	nvkm_done(join->inst);
	}
	}

	static const struct nvkm_vmm_desc_func
	nv50_vmm_pgd = {
	.pde = nv50_vmm_pgd_pde,
	};

	const struct nvkm_vmm_desc
	nv50_vmm_desc_12[] = {
	{ PGT, 17, 8, 0x1000, &nv50_vmm_pgt },
	{ PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
	{}
	};

	const struct nvkm_vmm_desc
	nv50_vmm_desc_16[] = {
	{ PGT, 13, 8, 0x1000, &nv50_vmm_pgt },
	{ PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
	{}
	};

	void
	nv50_vmm_flush(struct nvkm_vmm *vmm, int level)
	{
	struct nvkm_subdev *subdev = &vmm->mmu->subdev;
	struct nvkm_device *device = subdev->device;
	int i, id;

	mutex_lock(&subdev->mutex);
	for (i = 0; i < NVKM_SUBDEV_NR; i++) {
	if (!atomic_read(&vmm->engref[i]))
	continue;

	/* unfortunate hw bug workaround... */
	if (i == NVKM_ENGINE_GR && device->gr) {
	int ret = nvkm_gr_tlb_flush(device->gr);
	if (ret != -ENODEV)
	continue;
	}

	switch (i) {
	case NVKM_ENGINE_GR : id = 0x00; break;
	case NVKM_ENGINE_VP :
	case NVKM_ENGINE_MSPDEC: id = 0x01; break;
	case NVKM_SUBDEV_BAR : id = 0x06; break;
	case NVKM_ENGINE_MSPPP :
	case NVKM_ENGINE_MPEG : id = 0x08; break;
	case NVKM_ENGINE_BSP :
	case NVKM_ENGINE_MSVLD : id = 0x09; break;
	case NVKM_ENGINE_CIPHER:
	case NVKM_ENGINE_SEC : id = 0x0a; break;
	case NVKM_ENGINE_CE0 : id = 0x0d; break;
	default:
	continue;
	}

	nvkm_wr32(device, 0x100c80, (id << 16) \| 1);
	if (nvkm_msec(device, 2000,
	if (!(nvkm_rd32(device, 0x100c80) & 0x00000001))
	break;
	) < 0)
	nvkm_error(subdev, "%s mmu invalidate timeout\n",
	nvkm_subdev_name[i]);
	}
	mutex_unlock(&subdev->mutex);
	}

	int
	nv50_vmm_valid(struct nvkm_vmm vmm, void argv, u32 argc,
	struct nvkm_vmm_map *map)
	{
	const struct nvkm_vmm_page *page = map->page;
	union {
	struct nv50_vmm_map_vn vn;
	struct nv50_vmm_map_v0 v0;
	} *args = argv;
	struct nvkm_device *device = vmm->mmu->subdev.device;
	struct nvkm_ram *ram = device->fb->ram;
	struct nvkm_memory *memory = map->memory;
	u8 aper, kind, comp, priv, ro;
	int kindn, ret = -ENOSYS;
	const u8 *kindm;

	map->type = map->ctag = 0;
	map->next = 1 << page->shift;

	if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
	ro = !!args->v0.ro;
	priv = !!args->v0.priv;
	kind = args->v0.kind & 0x7f;
	comp = args->v0.comp & 0x03;
	} else
	if (!(ret = nvif_unvers(ret, &argv, &argc, args->vn))) {
	ro = 0;
	priv = 0;
	kind = 0x00;
	comp = 0;
	} else {
	VMM_DEBUG(vmm, "args");
	return ret;
	}

	switch (nvkm_memory_target(memory)) {
	case NVKM_MEM_TARGET_VRAM:
	if (ram->stolen) {
	map->type \|= ram->stolen;
	aper = 3;
	} else {
	aper = 0;
	}
	break;
	case NVKM_MEM_TARGET_HOST:
	aper = 2;
	break;
	case NVKM_MEM_TARGET_NCOH:
	aper = 3;
	break;
	default:
	WARN_ON(1);
	return -EINVAL;
	}

	kindm = vmm->mmu->func->kind(vmm->mmu, &kindn);
	if (kind >= kindn \|\| kindm[kind] == 0x7f) {
	VMM_DEBUG(vmm, "kind %02x", kind);
	return -EINVAL;
	}

	if (map->mem && map->mem->type != kindm[kind]) {
	VMM_DEBUG(vmm, "kind %02x bankswz: %d %d", kind,
	kindm[kind], map->mem->type);
	return -EINVAL;
	}

	if (comp) {
	u32 tags = (nvkm_memory_size(memory) >> 16) * comp;
	if (aper != 0 \|\| !(page->type & NVKM_VMM_PAGE_COMP)) {
	VMM_DEBUG(vmm, "comp %d %02x", aper, page->type);
	return -EINVAL;
	}

	ret = nvkm_memory_tags_get(memory, device, tags, NULL,
	&map->tags);
	if (ret) {
	VMM_DEBUG(vmm, "comp %d", ret);
	return ret;
	}

	if (map->tags->mn) {
	u32 tags = map->tags->mn->offset + (map->offset >> 16);
	map->ctag \|= (u64)comp << 49;
	map->type \|= (u64)comp << 47;
	map->type \|= (u64)tags << 49;
	map->next \|= map->ctag;
	}
	}

	map->type \|= BIT(0); /* Valid. */
	map->type \|= (u64)ro << 3;
	map->type \|= (u64)aper << 4;
	map->type \|= (u64)priv << 6;
	map->type \|= (u64)kind << 40;
	return 0;
	}

	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;
	}
	}
	}

	int
	nv50_vmm_join(struct nvkm_vmm vmm, struct nvkm_memory inst)
	{
	const u32 pd_offset = vmm->mmu->func->vmm.pd_offset;
	struct nvkm_vmm_join *join;
	int ret = 0;
	u64 data;
	u32 pdei;

	if (!(join = kmalloc(sizeof(*join), GFP_KERNEL)))
	return -ENOMEM;
	join->inst = inst;
	list_add_tail(&join->head, &vmm->join);

	nvkm_kmap(join->inst);
	for (pdei = vmm->start >> 29; pdei <= (vmm->limit - 1) >> 29; pdei++) {
	if (!nv50_vmm_pde(vmm, vmm->pd->pde[pdei], &data)) {
	ret = -EINVAL;
	break;
	}
	nvkm_wo64(join->inst, pd_offset + (pdei * 8), data);
	}
	nvkm_done(join->inst);
	return ret;
	}

	static const struct nvkm_vmm_func
	nv50_vmm = {
	.join = nv50_vmm_join,
	.part = nv50_vmm_part,
	.valid = nv50_vmm_valid,
	.flush = nv50_vmm_flush,
	.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, bool managed, 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, managed, addr, size,
	argv, argc, key, name, pvmm);
	}