1 /*
2  * Copyright 2017 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  */
22 #include "vmm.h"
23 
24 static const struct nvkm_vmm_desc_func
25 nv44_vmm_desc_pgt = {
26 };
27 
28 static const struct nvkm_vmm_desc
29 nv44_vmm_desc_12[] = {
30 	{ PGT, 17, 4, 0x80000, &nv44_vmm_desc_pgt },
31 	{}
32 };
33 
34 static const struct nvkm_vmm_func
35 nv44_vmm = {
36 	.page = {
37 		{ 12, &nv44_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
38 		{}
39 	}
40 };
41 
42 int
43 nv44_vmm_new(struct nvkm_mmu *mmu, u64 addr, u64 size, void *argv, u32 argc,
44 	     struct lock_class_key *key, const char *name,
45 	     struct nvkm_vmm **pvmm)
46 {
47 	struct nvkm_subdev *subdev = &mmu->subdev;
48 	struct nvkm_vmm *vmm;
49 	int ret;
50 
51 	ret = nv04_vmm_new_(&nv44_vmm, mmu, 0, addr, size,
52 			    argv, argc, key, name, &vmm);
53 	*pvmm = vmm;
54 	if (ret)
55 		return ret;
56 
57 	vmm->nullp = dma_alloc_coherent(subdev->device->dev, 16 * 1024,
58 					&vmm->null, GFP_KERNEL);
59 	if (!vmm->nullp) {
60 		nvkm_warn(subdev, "unable to allocate dummy pages\n");
61 		vmm->null = 0;
62 	}
63 
64 	return 0;
65 }
66