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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 "nouveau_vmm.h"
#include "nouveau_drv.h"
#include "nouveau_bo.h"
#include "nouveau_mem.h"
void
nouveau_vma_unmap(struct nouveau_vma *vma)
{
if (vma->mem) {
nvkm_vm_unmap(&vma->_vma);
vma->mem = NULL;
}
}
int
nouveau_vma_map(struct nouveau_vma *vma, struct nouveau_mem *mem)
{
int ret = nouveau_mem_map(mem, vma->vmm->vm, &vma->_vma);
if (ret)
return ret;
vma->mem = mem;
return 0;
}
struct nouveau_vma *
nouveau_vma_find(struct nouveau_bo *nvbo, struct nouveau_vmm *vmm)
{
struct nouveau_vma *vma;
list_for_each_entry(vma, &nvbo->vma_list, head) {
if (vma->vmm == vmm)
return vma;
}
return NULL;
}
void
nouveau_vma_del(struct nouveau_vma **pvma)
{
struct nouveau_vma *vma = *pvma;
if (vma && --vma->refs <= 0) {
if (likely(vma->addr != ~0ULL)) {
nouveau_vma_unmap(vma);
nvkm_vm_put(&vma->_vma);
}
list_del(&vma->head);
*pvma = NULL;
kfree(*pvma);
}
}
int
nouveau_vma_new(struct nouveau_bo *nvbo, struct nouveau_vmm *vmm,
struct nouveau_vma **pvma)
{
struct nouveau_mem *mem = nouveau_mem(&nvbo->bo.mem);
struct nouveau_vma *vma;
int ret;
if ((vma = *pvma = nouveau_vma_find(nvbo, vmm))) {
vma->refs++;
return 0;
}
if (!(vma = *pvma = kmalloc(sizeof(*vma), GFP_KERNEL)))
return -ENOMEM;
vma->vmm = vmm;
vma->refs = 1;
vma->addr = ~0ULL;
vma->mem = NULL;
list_add_tail(&vma->head, &nvbo->vma_list);
if (nvbo->bo.mem.mem_type != TTM_PL_SYSTEM &&
mem->mem.page == nvbo->page) {
ret = nvkm_vm_get(vmm->vm, mem->_mem->size << 12, mem->mem.page,
NV_MEM_ACCESS_RW, &vma->_vma);
if (ret)
goto done;
vma->addr = vma->_vma.offset;
ret = nouveau_vma_map(vma, mem);
} else {
ret = nvkm_vm_get(vmm->vm, mem->_mem->size << 12, mem->mem.page,
NV_MEM_ACCESS_RW, &vma->_vma);
vma->addr = vma->_vma.offset;
}
done:
if (ret)
nouveau_vma_del(pvma);
return ret;
}
void
nouveau_vmm_fini(struct nouveau_vmm *vmm)
{
nvkm_vm_ref(NULL, &vmm->vm, NULL);
}
int
nouveau_vmm_init(struct nouveau_cli *cli, s32 oclass, struct nouveau_vmm *vmm)
{
vmm->cli = cli;
return nvkm_vm_new(nvxx_device(&cli->device), 0, (1ULL << 40),
0x1000, NULL, &vmm->vm);
}
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