1 /*	$NetBSD: nouveau_dma.h,v 1.3 2021/12/18 23:45:32 riastradh Exp $	*/
2 
3 /*
4  * Copyright (C) 2007 Ben Skeggs.
5  * All Rights Reserved.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining
8  * a copy of this software and associated documentation files (the
9  * "Software"), to deal in the Software without restriction, including
10  * without limitation the rights to use, copy, modify, merge, publish,
11  * distribute, sublicense, and/or sell copies of the Software, and to
12  * permit persons to whom the Software is furnished to do so, subject to
13  * the following conditions:
14  *
15  * The above copyright notice and this permission notice (including the
16  * next paragraph) shall be included in all copies or substantial
17  * portions of the Software.
18  *
19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
22  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
23  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26  *
27  */
28 
29 #ifndef __NOUVEAU_DMA_H__
30 #define __NOUVEAU_DMA_H__
31 
32 #include "nouveau_bo.h"
33 #include "nouveau_chan.h"
34 
35 int nouveau_dma_wait(struct nouveau_channel *, int slots, int size);
36 void nv50_dma_push(struct nouveau_channel *, u64 addr, int length);
37 
38 /*
39  * There's a hw race condition where you can't jump to your PUT offset,
40  * to avoid this we jump to offset + SKIPS and fill the difference with
41  * NOPs.
42  *
43  * xf86-video-nv configures the DMA fetch size to 32 bytes, and uses
44  * a SKIPS value of 8.  Lets assume that the race condition is to do
45  * with writing into the fetch area, we configure a fetch size of 128
46  * bytes so we need a larger SKIPS value.
47  */
48 #define NOUVEAU_DMA_SKIPS (128 / 4)
49 
50 /* Hardcoded object assignments to subchannels (subchannel id). */
51 enum {
52 	NvSubCtxSurf2D  = 0,
53 	NvSubSw		= 1,
54 	NvSubImageBlit  = 2,
55 	NvSubGdiRect    = 3,
56 
57 	NvSub2D		= 3, /* DO NOT CHANGE - hardcoded for kepler gr fifo */
58 	NvSubCopy	= 4, /* DO NOT CHANGE - hardcoded for kepler gr fifo */
59 };
60 
61 /* Object handles - for stuff that's doesn't use handle == oclass. */
62 enum {
63 	NvDmaFB		= 0x80000002,
64 	NvDmaTT		= 0x80000003,
65 	NvNotify0       = 0x80000006,
66 	NvSema		= 0x8000000f,
67 	NvEvoSema0	= 0x80000010,
68 	NvEvoSema1	= 0x80000011,
69 };
70 
71 #define NV_MEMORY_TO_MEMORY_FORMAT                                    0x00000039
72 #define NV_MEMORY_TO_MEMORY_FORMAT_NAME                               0x00000000
73 #define NV_MEMORY_TO_MEMORY_FORMAT_SET_REF                            0x00000050
74 #define NV_MEMORY_TO_MEMORY_FORMAT_NOP                                0x00000100
75 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY                             0x00000104
76 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY_STYLE_WRITE                 0x00000000
77 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY_STYLE_WRITE_LE_AWAKEN       0x00000001
78 #define NV_MEMORY_TO_MEMORY_FORMAT_DMA_NOTIFY                         0x00000180
79 #define NV_MEMORY_TO_MEMORY_FORMAT_DMA_SOURCE                         0x00000184
80 #define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN                          0x0000030c
81 
82 #define NV50_MEMORY_TO_MEMORY_FORMAT                                  0x00005039
83 #define NV50_MEMORY_TO_MEMORY_FORMAT_UNK200                           0x00000200
84 #define NV50_MEMORY_TO_MEMORY_FORMAT_UNK21C                           0x0000021c
85 #define NV50_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN_HIGH                   0x00000238
86 #define NV50_MEMORY_TO_MEMORY_FORMAT_OFFSET_OUT_HIGH                  0x0000023c
87 
88 static __must_check inline int
RING_SPACE(struct nouveau_channel * chan,int size)89 RING_SPACE(struct nouveau_channel *chan, int size)
90 {
91 	int ret;
92 
93 	ret = nouveau_dma_wait(chan, 1, size);
94 	if (ret)
95 		return ret;
96 
97 	chan->dma.free -= size;
98 	return 0;
99 }
100 
101 static inline void
OUT_RING(struct nouveau_channel * chan,int data)102 OUT_RING(struct nouveau_channel *chan, int data)
103 {
104 	nouveau_bo_wr32(chan->push.buffer, chan->dma.cur++, data);
105 }
106 
107 extern void
108 OUT_RINGp(struct nouveau_channel *chan, const void *data, unsigned nr_dwords);
109 
110 static inline void
BEGIN_NV04(struct nouveau_channel * chan,int subc,int mthd,int size)111 BEGIN_NV04(struct nouveau_channel *chan, int subc, int mthd, int size)
112 {
113 	OUT_RING(chan, 0x00000000 | (subc << 13) | (size << 18) | mthd);
114 }
115 
116 static inline void
BEGIN_NI04(struct nouveau_channel * chan,int subc,int mthd,int size)117 BEGIN_NI04(struct nouveau_channel *chan, int subc, int mthd, int size)
118 {
119 	OUT_RING(chan, 0x40000000 | (subc << 13) | (size << 18) | mthd);
120 }
121 
122 static inline void
BEGIN_NVC0(struct nouveau_channel * chan,int subc,int mthd,int size)123 BEGIN_NVC0(struct nouveau_channel *chan, int subc, int mthd, int size)
124 {
125 	OUT_RING(chan, 0x20000000 | (size << 16) | (subc << 13) | (mthd >> 2));
126 }
127 
128 static inline void
BEGIN_NIC0(struct nouveau_channel * chan,int subc,int mthd,int size)129 BEGIN_NIC0(struct nouveau_channel *chan, int subc, int mthd, int size)
130 {
131 	OUT_RING(chan, 0x60000000 | (size << 16) | (subc << 13) | (mthd >> 2));
132 }
133 
134 static inline void
BEGIN_IMC0(struct nouveau_channel * chan,int subc,int mthd,u16 data)135 BEGIN_IMC0(struct nouveau_channel *chan, int subc, int mthd, u16 data)
136 {
137 	OUT_RING(chan, 0x80000000 | (data << 16) | (subc << 13) | (mthd >> 2));
138 }
139 
140 #define WRITE_PUT(val) do {                                                    \
141 	mb();                                                   \
142 	nouveau_bo_rd32(chan->push.buffer, 0);                                 \
143 	nvif_wr32(&chan->user, chan->user_put, ((val) << 2) + chan->push.addr);\
144 } while (0)
145 
146 static inline void
FIRE_RING(struct nouveau_channel * chan)147 FIRE_RING(struct nouveau_channel *chan)
148 {
149 	if (chan->dma.cur == chan->dma.put)
150 		return;
151 	chan->accel_done = true;
152 
153 	if (chan->dma.ib_max) {
154 		nv50_dma_push(chan, chan->push.addr + (chan->dma.put << 2),
155 			      (chan->dma.cur - chan->dma.put) << 2);
156 	} else {
157 		WRITE_PUT(chan->dma.cur);
158 	}
159 
160 	chan->dma.put = chan->dma.cur;
161 }
162 
163 static inline void
WIND_RING(struct nouveau_channel * chan)164 WIND_RING(struct nouveau_channel *chan)
165 {
166 	chan->dma.cur = chan->dma.put;
167 }
168 
169 /* FIFO methods */
170 #define NV01_SUBCHAN_OBJECT                                          0x00000000
171 #define NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH                          0x00000010
172 #define NV84_SUBCHAN_SEMAPHORE_ADDRESS_LOW                           0x00000014
173 #define NV84_SUBCHAN_SEMAPHORE_SEQUENCE                              0x00000018
174 #define NV84_SUBCHAN_SEMAPHORE_TRIGGER                               0x0000001c
175 #define NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_EQUAL                 0x00000001
176 #define NV84_SUBCHAN_SEMAPHORE_TRIGGER_WRITE_LONG                    0x00000002
177 #define NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_GEQUAL                0x00000004
178 #define NVC0_SUBCHAN_SEMAPHORE_TRIGGER_YIELD                         0x00001000
179 #define NV84_SUBCHAN_UEVENT                                          0x00000020
180 #define NV84_SUBCHAN_WRCACHE_FLUSH                                   0x00000024
181 #define NV10_SUBCHAN_REF_CNT                                         0x00000050
182 #define NV11_SUBCHAN_DMA_SEMAPHORE                                   0x00000060
183 #define NV11_SUBCHAN_SEMAPHORE_OFFSET                                0x00000064
184 #define NV11_SUBCHAN_SEMAPHORE_ACQUIRE                               0x00000068
185 #define NV11_SUBCHAN_SEMAPHORE_RELEASE                               0x0000006c
186 #define NV40_SUBCHAN_YIELD                                           0x00000080
187 
188 /* NV_SW object class */
189 #define NV_SW_DMA_VBLSEM                                             0x0000018c
190 #define NV_SW_VBLSEM_OFFSET                                          0x00000400
191 #define NV_SW_VBLSEM_RELEASE_VALUE                                   0x00000404
192 #define NV_SW_VBLSEM_RELEASE                                         0x00000408
193 #define NV_SW_PAGE_FLIP                                              0x00000500
194 
195 #endif
196