1/* $NetBSD: nouveau_subdev_pwr_memx.c,v 1.1.1.1 2014/08/06 12:36:31 riastradh Exp $ */
2
3#include <sys/cdefs.h>
4__KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_pwr_memx.c,v 1.1.1.1 2014/08/06 12:36:31 riastradh Exp $");
5
6#ifndef __NVKM_PWR_MEMX_H__
7#define __NVKM_PWR_MEMX_H__
8
9#include <subdev/pwr.h>
10#include <subdev/pwr/fuc/os.h>
11
12struct nouveau_memx {
13 struct nouveau_pwr *ppwr;
14 u32 base;
15 u32 size;
16 struct {
17 u32 mthd;
18 u32 size;
19 u32 data[64];
20 } c;
21};
22
23static void
24memx_out(struct nouveau_memx *memx)
25{
26 struct nouveau_pwr *ppwr = memx->ppwr;
27 int i;
28
29 if (memx->c.size) {
30 nv_wr32(ppwr, 0x10a1c4, (memx->c.size << 16) | memx->c.mthd);
31 for (i = 0; i < memx->c.size; i++)
32 nv_wr32(ppwr, 0x10a1c4, memx->c.data[i]);
33 memx->c.size = 0;
34 }
35}
36
37static void
38memx_cmd(struct nouveau_memx *memx, u32 mthd, u32 size, u32 data[])
39{
40 if ((memx->c.size + size >= ARRAY_SIZE(memx->c.data)) ||
41 (memx->c.size && memx->c.mthd != mthd))
42 memx_out(memx);
43 memcpy(&memx->c.data[memx->c.size], data, size * sizeof(data[0]));
44 memx->c.size += size;
45 memx->c.mthd = mthd;
46}
47
48int
49nouveau_memx_init(struct nouveau_pwr *ppwr, struct nouveau_memx **pmemx)
50{
51 struct nouveau_memx *memx;
52 u32 reply[2];
53 int ret;
54
55 ret = ppwr->message(ppwr, reply, PROC_MEMX, MEMX_MSG_INFO, 0, 0);
56 if (ret)
57 return ret;
58
59 memx = *pmemx = kzalloc(sizeof(*memx), GFP_KERNEL);
60 if (!memx)
61 return -ENOMEM;
62 memx->ppwr = ppwr;
63 memx->base = reply[0];
64 memx->size = reply[1];
65
66 /* acquire data segment access */
67 do {
68 nv_wr32(ppwr, 0x10a580, 0x00000003);
69 } while (nv_rd32(ppwr, 0x10a580) != 0x00000003);
70 nv_wr32(ppwr, 0x10a1c0, 0x01000000 | memx->base);
71 nv_wr32(ppwr, 0x10a1c4, 0x00010000 | MEMX_ENTER);
72 nv_wr32(ppwr, 0x10a1c4, 0x00000000);
73 return 0;
74}
75
76int
77nouveau_memx_fini(struct nouveau_memx **pmemx, bool exec)
78{
79 struct nouveau_memx *memx = *pmemx;
80 struct nouveau_pwr *ppwr = memx->ppwr;
81 u32 finish, reply[2];
82
83 /* flush the cache... */
84 memx_out(memx);
85
86 /* release data segment access */
87 nv_wr32(ppwr, 0x10a1c4, 0x00000000 | MEMX_LEAVE);
88 finish = nv_rd32(ppwr, 0x10a1c0) & 0x00ffffff;
89 nv_wr32(ppwr, 0x10a580, 0x00000000);
90
91 /* call MEMX process to execute the script, and wait for reply */
92 if (exec) {
93 ppwr->message(ppwr, reply, PROC_MEMX, MEMX_MSG_EXEC,
94 memx->base, finish);
95 }
96
97 kfree(memx);
98 return 0;
99}
100
101void
102nouveau_memx_wr32(struct nouveau_memx *memx, u32 addr, u32 data)
103{
104 nv_debug(memx->ppwr, "R[%06x] = 0x%08x\n", addr, data);
105 memx_cmd(memx, MEMX_WR32, 2, (u32[]){ addr, data });
106}
107
108void
109nouveau_memx_wait(struct nouveau_memx *memx,
110 u32 addr, u32 mask, u32 data, u32 nsec)
111{
112 nv_debug(memx->ppwr, "R[%06x] & 0x%08x == 0x%08x, %d us\n",
113 addr, mask, data, nsec);
114 memx_cmd(memx, MEMX_WAIT, 4, (u32[]){ addr, ~mask, data, nsec });
115 memx_out(memx); /* fuc can't handle multiple */
116}
117
118void
119nouveau_memx_nsec(struct nouveau_memx *memx, u32 nsec)
120{
121 nv_debug(memx->ppwr, " DELAY = %d ns\n", nsec);
122 memx_cmd(memx, MEMX_DELAY, 1, (u32[]){ nsec });
123 memx_out(memx); /* fuc can't handle multiple */
124}
125
126#endif
127