mirror of
https://github.com/edk2-porting/linux-next.git
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129 lines
3.2 KiB
C
129 lines
3.2 KiB
C
/*
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* Copyright 2017 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "nouveau_vmm.h"
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#include "nouveau_drv.h"
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#include "nouveau_bo.h"
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#include "nouveau_mem.h"
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void
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nouveau_vma_unmap(struct nouveau_vma *vma)
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{
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if (vma->mem) {
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nvkm_vm_unmap(&vma->_vma);
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vma->mem = NULL;
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}
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}
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int
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nouveau_vma_map(struct nouveau_vma *vma, struct nouveau_mem *mem)
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{
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int ret = nouveau_mem_map(mem, vma->vmm->vm, &vma->_vma);
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if (ret)
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return ret;
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vma->mem = mem;
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return 0;
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}
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struct nouveau_vma *
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nouveau_vma_find(struct nouveau_bo *nvbo, struct nouveau_vmm *vmm)
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{
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struct nouveau_vma *vma;
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list_for_each_entry(vma, &nvbo->vma_list, head) {
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if (vma->vmm == vmm)
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return vma;
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}
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return NULL;
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}
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void
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nouveau_vma_del(struct nouveau_vma **pvma)
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{
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struct nouveau_vma *vma = *pvma;
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if (vma && --vma->refs <= 0) {
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if (likely(vma->addr != ~0ULL)) {
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nouveau_vma_unmap(vma);
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nvkm_vm_put(&vma->_vma);
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}
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list_del(&vma->head);
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*pvma = NULL;
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kfree(*pvma);
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}
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}
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int
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nouveau_vma_new(struct nouveau_bo *nvbo, struct nouveau_vmm *vmm,
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struct nouveau_vma **pvma)
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{
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struct nouveau_mem *mem = nouveau_mem(&nvbo->bo.mem);
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struct nouveau_vma *vma;
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int ret;
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if ((vma = *pvma = nouveau_vma_find(nvbo, vmm))) {
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vma->refs++;
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return 0;
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}
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if (!(vma = *pvma = kmalloc(sizeof(*vma), GFP_KERNEL)))
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return -ENOMEM;
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vma->vmm = vmm;
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vma->refs = 1;
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vma->addr = ~0ULL;
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vma->mem = NULL;
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list_add_tail(&vma->head, &nvbo->vma_list);
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if (nvbo->bo.mem.mem_type != TTM_PL_SYSTEM &&
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mem->mem.page == nvbo->page) {
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ret = nvkm_vm_get(vmm->vm, mem->_mem->size << 12, mem->mem.page,
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NV_MEM_ACCESS_RW, &vma->_vma);
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if (ret)
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goto done;
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vma->addr = vma->_vma.offset;
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ret = nouveau_vma_map(vma, mem);
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} else {
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ret = nvkm_vm_get(vmm->vm, mem->_mem->size << 12, mem->mem.page,
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NV_MEM_ACCESS_RW, &vma->_vma);
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vma->addr = vma->_vma.offset;
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}
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done:
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if (ret)
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nouveau_vma_del(pvma);
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return ret;
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}
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void
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nouveau_vmm_fini(struct nouveau_vmm *vmm)
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{
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nvkm_vm_ref(NULL, &vmm->vm, NULL);
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}
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int
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nouveau_vmm_init(struct nouveau_cli *cli, s32 oclass, struct nouveau_vmm *vmm)
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{
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vmm->cli = cli;
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return nvkm_vm_new(nvxx_device(&cli->device), 0, (1ULL << 40),
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0x1000, NULL, &vmm->vm);
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}
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