drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c - hafnium/third_party/linux - Git at Google

 /*
  * 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
  */
 #define nv50_instmem(p) container_of((p), struct nv50_instmem, base)
 #include "priv.h"

 #include <core/memory.h>
 #include <subdev/bar.h>
 #include <subdev/fb.h>
 #include <subdev/mmu.h>

 struct nv50_instmem {
 	struct nvkm_instmem base;
 	u64 addr;

 	/* Mappings that can be evicted when BAR2 space has been exhausted. */
 	struct list_head lru;
 };

 /******************************************************************************
  * instmem object implementation
  *****************************************************************************/
 #define nv50_instobj(p) container_of((p), struct nv50_instobj, base.memory)

 struct nv50_instobj {
 	struct nvkm_instobj base;
 	struct nv50_instmem *imem;
 	struct nvkm_memory *ram;
 	struct nvkm_vma *bar;
 	refcount_t maps;
 	void *map;
 	struct list_head lru;
 };

 static void
 nv50_instobj_wr32_slow(struct nvkm_memory *memory, u64 offset, u32 data)
 {
 	struct nv50_instobj *iobj = nv50_instobj(memory);
 	struct nv50_instmem *imem = iobj->imem;
 	struct nvkm_device *device = imem->base.subdev.device;
 	u64 base = (nvkm_memory_addr(iobj->ram) + offset) & 0xffffff00000ULL;
 	u64 addr = (nvkm_memory_addr(iobj->ram) + offset) & 0x000000fffffULL;
 	unsigned long flags;

 	spin_lock_irqsave(&imem->base.lock, flags);
 	if (unlikely(imem->addr != base)) {
 		nvkm_wr32(device, 0x001700, base >> 16);
 		imem->addr = base;
 	}
 	nvkm_wr32(device, 0x700000 + addr, data);
 	spin_unlock_irqrestore(&imem->base.lock, flags);
 }

 static u32
 nv50_instobj_rd32_slow(struct nvkm_memory *memory, u64 offset)
 {
 	struct nv50_instobj *iobj = nv50_instobj(memory);
 	struct nv50_instmem *imem = iobj->imem;
 	struct nvkm_device *device = imem->base.subdev.device;
 	u64 base = (nvkm_memory_addr(iobj->ram) + offset) & 0xffffff00000ULL;
 	u64 addr = (nvkm_memory_addr(iobj->ram) + offset) & 0x000000fffffULL;
 	u32 data;
 	unsigned long flags;

 	spin_lock_irqsave(&imem->base.lock, flags);
 	if (unlikely(imem->addr != base)) {
 		nvkm_wr32(device, 0x001700, base >> 16);
 		imem->addr = base;
 	}
 	data = nvkm_rd32(device, 0x700000 + addr);
 	spin_unlock_irqrestore(&imem->base.lock, flags);
 	return data;
 }

 static const struct nvkm_memory_ptrs
 nv50_instobj_slow = {
 	.rd32 = nv50_instobj_rd32_slow,
 	.wr32 = nv50_instobj_wr32_slow,
 };

 static void
 nv50_instobj_wr32(struct nvkm_memory *memory, u64 offset, u32 data)
 {
 	iowrite32_native(data, nv50_instobj(memory)->map + offset);
 }

 static u32
 nv50_instobj_rd32(struct nvkm_memory *memory, u64 offset)
 {
 	return ioread32_native(nv50_instobj(memory)->map + offset);
 }

 static const struct nvkm_memory_ptrs
 nv50_instobj_fast = {
 	.rd32 = nv50_instobj_rd32,
 	.wr32 = nv50_instobj_wr32,
 };

 static void
 nv50_instobj_kmap(struct nv50_instobj *iobj, struct nvkm_vmm *vmm)
 {
 	struct nv50_instmem *imem = iobj->imem;
 	struct nv50_instobj *eobj;
 	struct nvkm_memory *memory = &iobj->base.memory;
 	struct nvkm_subdev *subdev = &imem->base.subdev;
 	struct nvkm_device *device = subdev->device;
 	struct nvkm_vma *bar = NULL, *ebar;
 	u64 size = nvkm_memory_size(memory);
 	void *emap;
 	int ret;

 	/* Attempt to allocate BAR2 address-space and map the object
 	 * into it.  The lock has to be dropped while doing this due
 	 * to the possibility of recursion for page table allocation.
 	 */
 	mutex_unlock(&subdev->mutex);
 	while ((ret = nvkm_vmm_get(vmm, 12, size, &bar))) {
 		/* Evict unused mappings, and keep retrying until we either
 		 * succeed,or there's no more objects left on the LRU.
 		 */
 		mutex_lock(&subdev->mutex);
 		eobj = list_first_entry_or_null(&imem->lru, typeof(*eobj), lru);
 		if (eobj) {
 			nvkm_debug(subdev, "evict %016llx %016llx @ %016llx\n",
 				   nvkm_memory_addr(&eobj->base.memory),
 				   nvkm_memory_size(&eobj->base.memory),
 				   eobj->bar->addr);
 			list_del_init(&eobj->lru);
 			ebar = eobj->bar;
 			eobj->bar = NULL;
 			emap = eobj->map;
 			eobj->map = NULL;
 		}
 		mutex_unlock(&subdev->mutex);
 		if (!eobj)
 			break;
 		iounmap(emap);
 		nvkm_vmm_put(vmm, &ebar);
 	}

 	if (ret == 0)
 		ret = nvkm_memory_map(memory, 0, vmm, bar, NULL, 0);
 	mutex_lock(&subdev->mutex);
 	if (ret || iobj->bar) {
 		/* We either failed, or another thread beat us. */
 		mutex_unlock(&subdev->mutex);
 		nvkm_vmm_put(vmm, &bar);
 		mutex_lock(&subdev->mutex);
 		return;
 	}

 	/* Make the mapping visible to the host. */
 	iobj->bar = bar;
 	iobj->map = ioremap_wc(device->func->resource_addr(device, 3) +
 			       (u32)iobj->bar->addr, size);
 	if (!iobj->map) {
 		nvkm_warn(subdev, "PRAMIN ioremap failed\n");
 		nvkm_vmm_put(vmm, &iobj->bar);
 	}
 }

 static int
 nv50_instobj_map(struct nvkm_memory *memory, u64 offset, struct nvkm_vmm *vmm,
 		 struct nvkm_vma *vma, void *argv, u32 argc)
 {
 	memory = nv50_instobj(memory)->ram;
 	return nvkm_memory_map(memory, offset, vmm, vma, argv, argc);
 }

 static void
 nv50_instobj_release(struct nvkm_memory *memory)
 {
 	struct nv50_instobj *iobj = nv50_instobj(memory);
 	struct nv50_instmem *imem = iobj->imem;
 	struct nvkm_subdev *subdev = &imem->base.subdev;

 	wmb();
 	nvkm_bar_flush(subdev->device->bar);

 	if (refcount_dec_and_mutex_lock(&iobj->maps, &subdev->mutex)) {
 		/* Add the now-unused mapping to the LRU instead of directly
 		 * unmapping it here, in case we need to map it again later.
 		 */
 		if (likely(iobj->lru.next) && iobj->map) {
 			BUG_ON(!list_empty(&iobj->lru));
 			list_add_tail(&iobj->lru, &imem->lru);
 		}

 		/* Switch back to NULL accessors when last map is gone. */
 		iobj->base.memory.ptrs = NULL;
 		mutex_unlock(&subdev->mutex);
 	}
 }

 static void __iomem *
 nv50_instobj_acquire(struct nvkm_memory *memory)
 {
 	struct nv50_instobj *iobj = nv50_instobj(memory);
 	struct nvkm_instmem *imem = &iobj->imem->base;
 	struct nvkm_vmm *vmm;
 	void __iomem *map = NULL;

 	/* Already mapped? */
 	if (refcount_inc_not_zero(&iobj->maps))
 		return iobj->map;

 	/* Take the lock, and re-check that another thread hasn't
 	 * already mapped the object in the meantime.
 	 */
 	mutex_lock(&imem->subdev.mutex);
 	if (refcount_inc_not_zero(&iobj->maps)) {
 		mutex_unlock(&imem->subdev.mutex);
 		return iobj->map;
 	}

 	/* Attempt to get a direct CPU mapping of the object. */
 	if ((vmm = nvkm_bar_bar2_vmm(imem->subdev.device))) {
 		if (!iobj->map)
 			nv50_instobj_kmap(iobj, vmm);
 		map = iobj->map;
 	}

 	if (!refcount_inc_not_zero(&iobj->maps)) {
 		/* Exclude object from eviction while it's being accessed. */
 		if (likely(iobj->lru.next))
 			list_del_init(&iobj->lru);

 		if (map)
 			iobj->base.memory.ptrs = &nv50_instobj_fast;
 		else
 			iobj->base.memory.ptrs = &nv50_instobj_slow;
 		refcount_set(&iobj->maps, 1);
 	}

 	mutex_unlock(&imem->subdev.mutex);
 	return map;
 }

 static void
 nv50_instobj_boot(struct nvkm_memory *memory, struct nvkm_vmm *vmm)
 {
 	struct nv50_instobj *iobj = nv50_instobj(memory);
 	struct nvkm_instmem *imem = &iobj->imem->base;

 	/* Exclude bootstrapped objects (ie. the page tables for the
 	 * instmem BAR itself) from eviction.
 	 */
 	mutex_lock(&imem->subdev.mutex);
 	if (likely(iobj->lru.next)) {
 		list_del_init(&iobj->lru);
 		iobj->lru.next = NULL;
 	}

 	nv50_instobj_kmap(iobj, vmm);
 	nvkm_instmem_boot(imem);
 	mutex_unlock(&imem->subdev.mutex);
 }

 static u64
 nv50_instobj_size(struct nvkm_memory *memory)
 {
 	return nvkm_memory_size(nv50_instobj(memory)->ram);
 }

 static u64
 nv50_instobj_addr(struct nvkm_memory *memory)
 {
 	return nvkm_memory_addr(nv50_instobj(memory)->ram);
 }

 static enum nvkm_memory_target
 nv50_instobj_target(struct nvkm_memory *memory)
 {
 	return nvkm_memory_target(nv50_instobj(memory)->ram);
 }

 static void *
 nv50_instobj_dtor(struct nvkm_memory *memory)
 {
 	struct nv50_instobj *iobj = nv50_instobj(memory);
 	struct nvkm_instmem *imem = &iobj->imem->base;
 	struct nvkm_vma *bar;
 	void *map = map;

 	mutex_lock(&imem->subdev.mutex);
 	if (likely(iobj->lru.next))
 		list_del(&iobj->lru);
 	map = iobj->map;
 	bar = iobj->bar;
 	mutex_unlock(&imem->subdev.mutex);

 	if (map) {
 		struct nvkm_vmm *vmm = nvkm_bar_bar2_vmm(imem->subdev.device);
 		iounmap(map);
 		if (likely(vmm)) /* Can be NULL during BAR destructor. */
 			nvkm_vmm_put(vmm, &bar);
 	}

 	nvkm_memory_unref(&iobj->ram);
 	nvkm_instobj_dtor(imem, &iobj->base);
 	return iobj;
 }

 static const struct nvkm_memory_func
 nv50_instobj_func = {
 	.dtor = nv50_instobj_dtor,
 	.target = nv50_instobj_target,
 	.size = nv50_instobj_size,
 	.addr = nv50_instobj_addr,
 	.boot = nv50_instobj_boot,
 	.acquire = nv50_instobj_acquire,
 	.release = nv50_instobj_release,
 	.map = nv50_instobj_map,
 };

 static int
 nv50_instobj_new(struct nvkm_instmem *base, u32 size, u32 align, bool zero,
 		 struct nvkm_memory **pmemory)
 {
 	struct nv50_instmem *imem = nv50_instmem(base);
 	struct nv50_instobj *iobj;
 	struct nvkm_device *device = imem->base.subdev.device;
 	u8 page = max(order_base_2(align), 12);

 	if (!(iobj = kzalloc(sizeof(*iobj), GFP_KERNEL)))
 		return -ENOMEM;
 	*pmemory = &iobj->base.memory;

 	nvkm_instobj_ctor(&nv50_instobj_func, &imem->base, &iobj->base);
 	iobj->imem = imem;
 	refcount_set(&iobj->maps, 0);
 	INIT_LIST_HEAD(&iobj->lru);

 	return nvkm_ram_get(device, 0, 1, page, size, true, true, &iobj->ram);
 }

 /******************************************************************************
  * instmem subdev implementation
  *****************************************************************************/

 static void
 nv50_instmem_fini(struct nvkm_instmem *base)
 {
 	nv50_instmem(base)->addr = ~0ULL;
 }

 static const struct nvkm_instmem_func
 nv50_instmem = {
 	.fini = nv50_instmem_fini,
 	.memory_new = nv50_instobj_new,
 	.zero = false,
 };

 int
 nv50_instmem_new(struct nvkm_device *device, int index,
 		 struct nvkm_instmem **pimem)
 {
 	struct nv50_instmem *imem;

 	if (!(imem = kzalloc(sizeof(*imem), GFP_KERNEL)))
 		return -ENOMEM;
 	nvkm_instmem_ctor(&nv50_instmem, device, index, &imem->base);
 	INIT_LIST_HEAD(&imem->lru);
 	*pimem = &imem->base;
 	return 0;
 }
	/*
	* 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
	*/
	#define nv50_instmem(p) container_of((p), struct nv50_instmem, base)
	#include "priv.h"

	#include <core/memory.h>
	#include <subdev/bar.h>
	#include <subdev/fb.h>
	#include <subdev/mmu.h>

	struct nv50_instmem {
	struct nvkm_instmem base;
	u64 addr;

	/* Mappings that can be evicted when BAR2 space has been exhausted. */
	struct list_head lru;
	};

	/******************************************************************************
	* instmem object implementation
	*****************************************************************************/
	#define nv50_instobj(p) container_of((p), struct nv50_instobj, base.memory)

	struct nv50_instobj {
	struct nvkm_instobj base;
	struct nv50_instmem *imem;
	struct nvkm_memory *ram;
	struct nvkm_vma *bar;
	refcount_t maps;
	void *map;
	struct list_head lru;
	};

	static void
	nv50_instobj_wr32_slow(struct nvkm_memory *memory, u64 offset, u32 data)
	{
	struct nv50_instobj *iobj = nv50_instobj(memory);
	struct nv50_instmem *imem = iobj->imem;
	struct nvkm_device *device = imem->base.subdev.device;
	u64 base = (nvkm_memory_addr(iobj->ram) + offset) & 0xffffff00000ULL;
	u64 addr = (nvkm_memory_addr(iobj->ram) + offset) & 0x000000fffffULL;
	unsigned long flags;

	spin_lock_irqsave(&imem->base.lock, flags);
	if (unlikely(imem->addr != base)) {
	nvkm_wr32(device, 0x001700, base >> 16);
	imem->addr = base;
	}
	nvkm_wr32(device, 0x700000 + addr, data);
	spin_unlock_irqrestore(&imem->base.lock, flags);
	}

	static u32
	nv50_instobj_rd32_slow(struct nvkm_memory *memory, u64 offset)
	{
	struct nv50_instobj *iobj = nv50_instobj(memory);
	struct nv50_instmem *imem = iobj->imem;
	struct nvkm_device *device = imem->base.subdev.device;
	u64 base = (nvkm_memory_addr(iobj->ram) + offset) & 0xffffff00000ULL;
	u64 addr = (nvkm_memory_addr(iobj->ram) + offset) & 0x000000fffffULL;
	u32 data;
	unsigned long flags;

	spin_lock_irqsave(&imem->base.lock, flags);
	if (unlikely(imem->addr != base)) {
	nvkm_wr32(device, 0x001700, base >> 16);
	imem->addr = base;
	}
	data = nvkm_rd32(device, 0x700000 + addr);
	spin_unlock_irqrestore(&imem->base.lock, flags);
	return data;
	}

	static const struct nvkm_memory_ptrs
	nv50_instobj_slow = {
	.rd32 = nv50_instobj_rd32_slow,
	.wr32 = nv50_instobj_wr32_slow,
	};

	static void
	nv50_instobj_wr32(struct nvkm_memory *memory, u64 offset, u32 data)
	{
	iowrite32_native(data, nv50_instobj(memory)->map + offset);
	}

	static u32
	nv50_instobj_rd32(struct nvkm_memory *memory, u64 offset)
	{
	return ioread32_native(nv50_instobj(memory)->map + offset);
	}

	static const struct nvkm_memory_ptrs
	nv50_instobj_fast = {
	.rd32 = nv50_instobj_rd32,
	.wr32 = nv50_instobj_wr32,
	};

	static void
	nv50_instobj_kmap(struct nv50_instobj iobj, struct nvkm_vmm vmm)
	{
	struct nv50_instmem *imem = iobj->imem;
	struct nv50_instobj *eobj;
	struct nvkm_memory *memory = &iobj->base.memory;
	struct nvkm_subdev *subdev = &imem->base.subdev;
	struct nvkm_device *device = subdev->device;
	struct nvkm_vma bar = NULL, ebar;
	u64 size = nvkm_memory_size(memory);
	void *emap;
	int ret;

	/* Attempt to allocate BAR2 address-space and map the object
	* into it. The lock has to be dropped while doing this due
	* to the possibility of recursion for page table allocation.
	*/
	mutex_unlock(&subdev->mutex);
	while ((ret = nvkm_vmm_get(vmm, 12, size, &bar))) {
	/* Evict unused mappings, and keep retrying until we either
	* succeed,or there's no more objects left on the LRU.
	*/
	mutex_lock(&subdev->mutex);
	eobj = list_first_entry_or_null(&imem->lru, typeof(*eobj), lru);
	if (eobj) {
	nvkm_debug(subdev, "evict %016llx %016llx @ %016llx\n",
	nvkm_memory_addr(&eobj->base.memory),
	nvkm_memory_size(&eobj->base.memory),
	eobj->bar->addr);
	list_del_init(&eobj->lru);
	ebar = eobj->bar;
	eobj->bar = NULL;
	emap = eobj->map;
	eobj->map = NULL;
	}
	mutex_unlock(&subdev->mutex);
	if (!eobj)
	break;
	iounmap(emap);
	nvkm_vmm_put(vmm, &ebar);
	}

	if (ret == 0)
	ret = nvkm_memory_map(memory, 0, vmm, bar, NULL, 0);
	mutex_lock(&subdev->mutex);
	if (ret \|\| iobj->bar) {
	/* We either failed, or another thread beat us. */
	mutex_unlock(&subdev->mutex);
	nvkm_vmm_put(vmm, &bar);
	mutex_lock(&subdev->mutex);
	return;
	}

	/* Make the mapping visible to the host. */
	iobj->bar = bar;
	iobj->map = ioremap_wc(device->func->resource_addr(device, 3) +
	(u32)iobj->bar->addr, size);
	if (!iobj->map) {
	nvkm_warn(subdev, "PRAMIN ioremap failed\n");
	nvkm_vmm_put(vmm, &iobj->bar);
	}
	}

	static int
	nv50_instobj_map(struct nvkm_memory memory, u64 offset, struct nvkm_vmm vmm,
	struct nvkm_vma vma, void argv, u32 argc)
	{
	memory = nv50_instobj(memory)->ram;
	return nvkm_memory_map(memory, offset, vmm, vma, argv, argc);
	}

	static void
	nv50_instobj_release(struct nvkm_memory *memory)
	{
	struct nv50_instobj *iobj = nv50_instobj(memory);
	struct nv50_instmem *imem = iobj->imem;
	struct nvkm_subdev *subdev = &imem->base.subdev;

	wmb();
	nvkm_bar_flush(subdev->device->bar);

	if (refcount_dec_and_mutex_lock(&iobj->maps, &subdev->mutex)) {
	/* Add the now-unused mapping to the LRU instead of directly
	* unmapping it here, in case we need to map it again later.
	*/
	if (likely(iobj->lru.next) && iobj->map) {
	BUG_ON(!list_empty(&iobj->lru));
	list_add_tail(&iobj->lru, &imem->lru);
	}

	/* Switch back to NULL accessors when last map is gone. */
	iobj->base.memory.ptrs = NULL;
	mutex_unlock(&subdev->mutex);
	}
	}

	static void __iomem *
	nv50_instobj_acquire(struct nvkm_memory *memory)
	{
	struct nv50_instobj *iobj = nv50_instobj(memory);
	struct nvkm_instmem *imem = &iobj->imem->base;
	struct nvkm_vmm *vmm;
	void __iomem *map = NULL;

	/* Already mapped? */
	if (refcount_inc_not_zero(&iobj->maps))
	return iobj->map;

	/* Take the lock, and re-check that another thread hasn't
	* already mapped the object in the meantime.
	*/
	mutex_lock(&imem->subdev.mutex);
	if (refcount_inc_not_zero(&iobj->maps)) {
	mutex_unlock(&imem->subdev.mutex);
	return iobj->map;
	}

	/* Attempt to get a direct CPU mapping of the object. */
	if ((vmm = nvkm_bar_bar2_vmm(imem->subdev.device))) {
	if (!iobj->map)
	nv50_instobj_kmap(iobj, vmm);
	map = iobj->map;
	}

	if (!refcount_inc_not_zero(&iobj->maps)) {
	/* Exclude object from eviction while it's being accessed. */
	if (likely(iobj->lru.next))
	list_del_init(&iobj->lru);

	if (map)
	iobj->base.memory.ptrs = &nv50_instobj_fast;
	else
	iobj->base.memory.ptrs = &nv50_instobj_slow;
	refcount_set(&iobj->maps, 1);
	}

	mutex_unlock(&imem->subdev.mutex);
	return map;
	}

	static void
	nv50_instobj_boot(struct nvkm_memory memory, struct nvkm_vmm vmm)
	{
	struct nv50_instobj *iobj = nv50_instobj(memory);
	struct nvkm_instmem *imem = &iobj->imem->base;

	/* Exclude bootstrapped objects (ie. the page tables for the
	* instmem BAR itself) from eviction.
	*/
	mutex_lock(&imem->subdev.mutex);
	if (likely(iobj->lru.next)) {
	list_del_init(&iobj->lru);
	iobj->lru.next = NULL;
	}

	nv50_instobj_kmap(iobj, vmm);
	nvkm_instmem_boot(imem);
	mutex_unlock(&imem->subdev.mutex);
	}

	static u64
	nv50_instobj_size(struct nvkm_memory *memory)
	{
	return nvkm_memory_size(nv50_instobj(memory)->ram);
	}

	static u64
	nv50_instobj_addr(struct nvkm_memory *memory)
	{
	return nvkm_memory_addr(nv50_instobj(memory)->ram);
	}

	static enum nvkm_memory_target
	nv50_instobj_target(struct nvkm_memory *memory)
	{
	return nvkm_memory_target(nv50_instobj(memory)->ram);
	}

	static void *
	nv50_instobj_dtor(struct nvkm_memory *memory)
	{
	struct nv50_instobj *iobj = nv50_instobj(memory);
	struct nvkm_instmem *imem = &iobj->imem->base;
	struct nvkm_vma *bar;
	void *map = map;

	mutex_lock(&imem->subdev.mutex);
	if (likely(iobj->lru.next))
	list_del(&iobj->lru);
	map = iobj->map;
	bar = iobj->bar;
	mutex_unlock(&imem->subdev.mutex);

	if (map) {
	struct nvkm_vmm *vmm = nvkm_bar_bar2_vmm(imem->subdev.device);
	iounmap(map);
	if (likely(vmm)) /* Can be NULL during BAR destructor. */
	nvkm_vmm_put(vmm, &bar);
	}

	nvkm_memory_unref(&iobj->ram);
	nvkm_instobj_dtor(imem, &iobj->base);
	return iobj;
	}

	static const struct nvkm_memory_func
	nv50_instobj_func = {
	.dtor = nv50_instobj_dtor,
	.target = nv50_instobj_target,
	.size = nv50_instobj_size,
	.addr = nv50_instobj_addr,
	.boot = nv50_instobj_boot,
	.acquire = nv50_instobj_acquire,
	.release = nv50_instobj_release,
	.map = nv50_instobj_map,
	};

	static int
	nv50_instobj_new(struct nvkm_instmem *base, u32 size, u32 align, bool zero,
	struct nvkm_memory **pmemory)
	{
	struct nv50_instmem *imem = nv50_instmem(base);
	struct nv50_instobj *iobj;
	struct nvkm_device *device = imem->base.subdev.device;
	u8 page = max(order_base_2(align), 12);

	if (!(iobj = kzalloc(sizeof(*iobj), GFP_KERNEL)))
	return -ENOMEM;
	*pmemory = &iobj->base.memory;

	nvkm_instobj_ctor(&nv50_instobj_func, &imem->base, &iobj->base);
	iobj->imem = imem;
	refcount_set(&iobj->maps, 0);
	INIT_LIST_HEAD(&iobj->lru);

	return nvkm_ram_get(device, 0, 1, page, size, true, true, &iobj->ram);
	}

	/******************************************************************************
	* instmem subdev implementation
	*****************************************************************************/

	static void
	nv50_instmem_fini(struct nvkm_instmem *base)
	{
	nv50_instmem(base)->addr = ~0ULL;
	}

	static const struct nvkm_instmem_func
	nv50_instmem = {
	.fini = nv50_instmem_fini,
	.memory_new = nv50_instobj_new,
	.zero = false,
	};

	int
	nv50_instmem_new(struct nvkm_device *device, int index,
	struct nvkm_instmem **pimem)
	{
	struct nv50_instmem *imem;

	if (!(imem = kzalloc(sizeof(*imem), GFP_KERNEL)))
	return -ENOMEM;
	nvkm_instmem_ctor(&nv50_instmem, device, index, &imem->base);
	INIT_LIST_HEAD(&imem->lru);
	*pimem = &imem->base;
	return 0;
	}