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/*
* 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 "umem.h"
#include "ummu.h"
#include <core/client.h>
#include <core/memory.h>
#include <subdev/bar.h>
#include <nvif/class.h>
#include <nvif/if000a.h>
#include <nvif/unpack.h>
static const struct nvkm_object_func nvkm_umem;
struct nvkm_memory *
nvkm_umem_search(struct nvkm_client *client, u64 handle)
{
struct nvkm_client *master = client->object.client;
struct nvkm_memory *memory = NULL;
struct nvkm_object *object;
struct nvkm_umem *umem;
object = nvkm_object_search(client, handle, &nvkm_umem);
if (IS_ERR(object)) {
if (client != master) {
spin_lock(&master->lock);
list_for_each_entry(umem, &master->umem, head) {
if (umem->object.object == handle) {
memory = nvkm_memory_ref(umem->memory);
break;
}
}
spin_unlock(&master->lock);
}
} else {
umem = nvkm_umem(object);
memory = nvkm_memory_ref(umem->memory);
}
return memory ? memory : ERR_PTR(-ENOENT);
}
static int
nvkm_umem_unmap(struct nvkm_object *object)
{
struct nvkm_umem *umem = nvkm_umem(object);
if (!umem->map)
return -EEXIST;
if (umem->io) {
if (!IS_ERR(umem->bar)) {
struct nvkm_device *device = umem->mmu->subdev.device;
nvkm_vmm_put(nvkm_bar_bar1_vmm(device), &umem->bar);
} else {
umem->bar = NULL;
}
} else {
vunmap(umem->map);
umem->map = NULL;
}
return 0;
}
static int
nvkm_umem_map(struct nvkm_object *object, void *argv, u32 argc,
enum nvkm_object_map *type, u64 *handle, u64 *length)
{
struct nvkm_umem *umem = nvkm_umem(object);
struct nvkm_mmu *mmu = umem->mmu;
if (!umem->mappable)
return -EINVAL;
if (umem->map)
return -EEXIST;
if ((umem->type & NVKM_MEM_HOST) && !argc) {
int ret = nvkm_mem_map_host(umem->memory, &umem->map);
if (ret)
return ret;
*handle = (unsigned long)(void *)umem->map;
*length = nvkm_memory_size(umem->memory);
*type = NVKM_OBJECT_MAP_VA;
return 0;
} else
if ((umem->type & NVKM_MEM_VRAM) ||
(umem->type & NVKM_MEM_KIND)) {
int ret = mmu->func->mem.umap(mmu, umem->memory, argv, argc,
handle, length, &umem->bar);
if (ret)
return ret;
*type = NVKM_OBJECT_MAP_IO;
} else {
return -EINVAL;
}
umem->io = (*type == NVKM_OBJECT_MAP_IO);
return 0;
}
static void *
nvkm_umem_dtor(struct nvkm_object *object)
{
struct nvkm_umem *umem = nvkm_umem(object);
spin_lock(&umem->object.client->lock);
list_del_init(&umem->head);
spin_unlock(&umem->object.client->lock);
nvkm_memory_unref(&umem->memory);
return umem;
}
static const struct nvkm_object_func
nvkm_umem = {
.dtor = nvkm_umem_dtor,
.map = nvkm_umem_map,
.unmap = nvkm_umem_unmap,
};
int
nvkm_umem_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
struct nvkm_object **pobject)
{
struct nvkm_mmu *mmu = nvkm_ummu(oclass->parent)->mmu;
union {
struct nvif_mem_v0 v0;
} *args = argv;
struct nvkm_umem *umem;
int type, ret = -ENOSYS;
u8 page;
u64 size;
if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
type = args->v0.type;
page = args->v0.page;
size = args->v0.size;
} else
return ret;
if (type >= mmu->type_nr)
return -EINVAL;
if (!(umem = kzalloc(sizeof(*umem), GFP_KERNEL)))
return -ENOMEM;
nvkm_object_ctor(&nvkm_umem, oclass, &umem->object);
umem->mmu = mmu;
umem->type = mmu->type[type].type;
INIT_LIST_HEAD(&umem->head);
*pobject = &umem->object;
if (mmu->type[type].type & NVKM_MEM_MAPPABLE) {
page = max_t(u8, page, PAGE_SHIFT);
umem->mappable = true;
}
ret = nvkm_mem_new_type(mmu, type, page, size, argv, argc,
&umem->memory);
if (ret)
return ret;
spin_lock(&umem->object.client->lock);
list_add(&umem->head, &umem->object.client->umem);
spin_unlock(&umem->object.client->lock);
args->v0.page = nvkm_memory_page(umem->memory);
args->v0.addr = nvkm_memory_addr(umem->memory);
args->v0.size = nvkm_memory_size(umem->memory);
return 0;
}
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