1 /*
2  * Copyright 2013 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 #define mcp77_ram(p) container_of((p), struct mcp77_ram, base)
25 #include "ram.h"
26 
27 struct mcp77_ram {
28 	struct nvkm_ram base;
29 	u64 poller_base;
30 };
31 
32 static int
mcp77_ram_init(struct nvkm_ram * base)33 mcp77_ram_init(struct nvkm_ram *base)
34 {
35 	struct mcp77_ram *ram = mcp77_ram(base);
36 	struct nvkm_device *device = ram->base.fb->subdev.device;
37 	u32 dniso  = ((ram->base.size - (ram->poller_base + 0x00)) >> 5) - 1;
38 	u32 hostnb = ((ram->base.size - (ram->poller_base + 0x20)) >> 5) - 1;
39 	u32 flush  = ((ram->base.size - (ram->poller_base + 0x40)) >> 5) - 1;
40 
41 	/* Enable NISO poller for various clients and set their associated
42 	 * read address, only for MCP77/78 and MCP79/7A. (fd#27501)
43 	 */
44 	nvkm_wr32(device, 0x100c18, dniso);
45 	nvkm_mask(device, 0x100c14, 0x00000000, 0x00000001);
46 	nvkm_wr32(device, 0x100c1c, hostnb);
47 	nvkm_mask(device, 0x100c14, 0x00000000, 0x00000002);
48 	nvkm_wr32(device, 0x100c24, flush);
49 	nvkm_mask(device, 0x100c14, 0x00000000, 0x00010000);
50 	return 0;
51 }
52 
53 static const struct nvkm_ram_func
54 mcp77_ram_func = {
55 	.init = mcp77_ram_init,
56 };
57 
58 int
mcp77_ram_new(struct nvkm_fb * fb,struct nvkm_ram ** pram)59 mcp77_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
60 {
61 	struct nvkm_device *device = fb->subdev.device;
62 	u32 rsvd_head = ( 256 * 1024); /* vga memory */
63 	u32 rsvd_tail = (1024 * 1024) + 0x1000; /* vbios etc + poller mem */
64 	u64 base = (u64)nvkm_rd32(device, 0x100e10) << 12;
65 	u64 size = (u64)nvkm_rd32(device, 0x100e14) << 12;
66 	struct mcp77_ram *ram;
67 	int ret;
68 
69 	if (!(ram = kzalloc(sizeof(*ram), GFP_KERNEL)))
70 		return -ENOMEM;
71 	*pram = &ram->base;
72 
73 	ret = nvkm_ram_ctor(&mcp77_ram_func, fb, NVKM_RAM_TYPE_STOLEN,
74 			    size, &ram->base);
75 	if (ret)
76 		return ret;
77 
78 	ram->poller_base = size - rsvd_tail;
79 	ram->base.stolen = base;
80 	nvkm_mm_fini(&ram->base.vram);
81 
82 	return nvkm_mm_init(&ram->base.vram, NVKM_RAM_MM_NORMAL,
83 			    rsvd_head >> NVKM_RAM_MM_SHIFT,
84 			    (size - rsvd_head - rsvd_tail) >>
85 			    NVKM_RAM_MM_SHIFT, 1);
86 }
87