2 * Copyright (C) 2007 Ben Skeggs.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 #ifndef __NOUVEAU_DMA_H__
28 #define __NOUVEAU_DMA_H__
30 #include "nouveau_bo.h"
31 #include "nouveau_chan.h"
33 int nouveau_dma_wait(struct nouveau_channel *, int slots, int size);
34 void nv50_dma_push(struct nouveau_channel *, u64 addr, u32 length,
38 * There's a hw race condition where you can't jump to your PUT offset,
39 * to avoid this we jump to offset + SKIPS and fill the difference with
42 * xf86-video-nv configures the DMA fetch size to 32 bytes, and uses
43 * a SKIPS value of 8. Lets assume that the race condition is to do
44 * with writing into the fetch area, we configure a fetch size of 128
45 * bytes so we need a larger SKIPS value.
47 #define NOUVEAU_DMA_SKIPS (128 / 4)
49 /* Maximum push buffer size. */
50 #define NV50_DMA_PUSH_MAX_LENGTH 0x7fffff
52 /* Object handles - for stuff that's doesn't use handle == oclass. */
56 NvNotify0 = 0x80000006,
58 NvEvoSema0 = 0x80000010,
59 NvEvoSema1 = 0x80000011,
62 static __must_check inline int
63 RING_SPACE(struct nouveau_channel *chan, int size)
67 ret = nouveau_dma_wait(chan, 1, size);
71 chan->dma.free -= size;
76 OUT_RING(struct nouveau_channel *chan, int data)
78 nouveau_bo_wr32(chan->push.buffer, chan->dma.cur++, data);
81 #define WRITE_PUT(val) do { \
83 nouveau_bo_rd32(chan->push.buffer, 0); \
84 nvif_wr32(&chan->user, chan->user_put, ((val) << 2) + chan->push.addr);\
88 FIRE_RING(struct nouveau_channel *chan)
90 if (chan->dma.cur == chan->dma.put)
92 chan->accel_done = true;
94 if (chan->dma.ib_max) {
95 nv50_dma_push(chan, chan->push.addr + (chan->dma.put << 2),
96 (chan->dma.cur - chan->dma.put) << 2, false);
98 WRITE_PUT(chan->dma.cur);
101 chan->dma.put = chan->dma.cur;
105 WIND_RING(struct nouveau_channel *chan)
107 chan->dma.cur = chan->dma.put;
110 /* NV_SW object class */
111 #define NV_SW_DMA_VBLSEM 0x0000018c
112 #define NV_SW_VBLSEM_OFFSET 0x00000400
113 #define NV_SW_VBLSEM_RELEASE_VALUE 0x00000404
114 #define NV_SW_VBLSEM_RELEASE 0x00000408
115 #define NV_SW_PAGE_FLIP 0x00000500