1 /*
2  * Copyright 2012 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  * Authors: Ben Skeggs
23  */
24 #include "mem.h"
25 #include "vmm.h"
26 
27 #include <core/option.h>
28 
29 #include <nvif/class.h>
30 
31 static void
32 nv44_mmu_init(struct nvkm_mmu *mmu)
33 {
34 	struct nvkm_device *device = mmu->subdev.device;
35 	struct nvkm_memory *pt = mmu->vmm->pd->pt[0]->memory;
36 	u32 addr;
37 
38 	/* calculate vram address of this PRAMIN block, object must be
39 	 * allocated on 512KiB alignment, and not exceed a total size
40 	 * of 512KiB for this to work correctly
41 	 */
42 	addr  = nvkm_rd32(device, 0x10020c);
43 	addr -= ((nvkm_memory_addr(pt) >> 19) + 1) << 19;
44 
45 	nvkm_wr32(device, 0x100850, 0x80000000);
46 	nvkm_wr32(device, 0x100818, mmu->vmm->null);
47 	nvkm_wr32(device, 0x100804, (nvkm_memory_size(pt) / 4) * 4096);
48 	nvkm_wr32(device, 0x100850, 0x00008000);
49 	nvkm_mask(device, 0x10008c, 0x00000200, 0x00000200);
50 	nvkm_wr32(device, 0x100820, 0x00000000);
51 	nvkm_wr32(device, 0x10082c, 0x00000001);
52 	nvkm_wr32(device, 0x100800, addr | 0x00000010);
53 }
54 
55 static const struct nvkm_mmu_func
56 nv44_mmu = {
57 	.init = nv44_mmu_init,
58 	.dma_bits = 39,
59 	.mmu = {{ -1, -1, NVIF_CLASS_MMU_NV04}},
60 	.mem = {{ -1, -1, NVIF_CLASS_MEM_NV04}, nv04_mem_new, nv04_mem_map },
61 	.vmm = {{ -1, -1, NVIF_CLASS_VMM_NV04}, nv44_vmm_new, true },
62 };
63 
64 int
65 nv44_mmu_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
66 	     struct nvkm_mmu **pmmu)
67 {
68 	if (device->type == NVKM_DEVICE_AGP ||
69 	    !nvkm_boolopt(device->cfgopt, "NvPCIE", true))
70 		return nv04_mmu_new(device, type, inst, pmmu);
71 
72 	return nvkm_mmu_new_(&nv44_mmu, device, type, inst, pmmu);
73 }
74