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- /*
- * Copyright (C) 2007 Ben Skeggs.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial
- * portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
- #ifndef __NOUVEAU_DMA_H__
- #define __NOUVEAU_DMA_H__
- #include "nouveau_bo.h"
- #include "nouveau_chan.h"
- int nouveau_dma_wait(struct nouveau_channel *, int slots, int size);
- void nv50_dma_push(struct nouveau_channel *, u64 addr, int length);
- /*
- * There's a hw race condition where you can't jump to your PUT offset,
- * to avoid this we jump to offset + SKIPS and fill the difference with
- * NOPs.
- *
- * xf86-video-nv configures the DMA fetch size to 32 bytes, and uses
- * a SKIPS value of 8. Lets assume that the race condition is to do
- * with writing into the fetch area, we configure a fetch size of 128
- * bytes so we need a larger SKIPS value.
- */
- #define NOUVEAU_DMA_SKIPS (128 / 4)
- /* Object handles - for stuff that's doesn't use handle == oclass. */
- enum {
- NvDmaFB = 0x80000002,
- NvDmaTT = 0x80000003,
- NvNotify0 = 0x80000006,
- NvSema = 0x8000000f,
- NvEvoSema0 = 0x80000010,
- NvEvoSema1 = 0x80000011,
- };
- static __must_check inline int
- RING_SPACE(struct nouveau_channel *chan, int size)
- {
- int ret;
- ret = nouveau_dma_wait(chan, 1, size);
- if (ret)
- return ret;
- chan->dma.free -= size;
- return 0;
- }
- static inline void
- OUT_RING(struct nouveau_channel *chan, int data)
- {
- nouveau_bo_wr32(chan->push.buffer, chan->dma.cur++, data);
- }
- #define WRITE_PUT(val) do { \
- mb(); \
- nouveau_bo_rd32(chan->push.buffer, 0); \
- nvif_wr32(&chan->user, chan->user_put, ((val) << 2) + chan->push.addr);\
- } while (0)
- static inline void
- FIRE_RING(struct nouveau_channel *chan)
- {
- if (chan->dma.cur == chan->dma.put)
- return;
- chan->accel_done = true;
- if (chan->dma.ib_max) {
- nv50_dma_push(chan, chan->push.addr + (chan->dma.put << 2),
- (chan->dma.cur - chan->dma.put) << 2);
- } else {
- WRITE_PUT(chan->dma.cur);
- }
- chan->dma.put = chan->dma.cur;
- }
- static inline void
- WIND_RING(struct nouveau_channel *chan)
- {
- chan->dma.cur = chan->dma.put;
- }
- /* NV_SW object class */
- #define NV_SW_DMA_VBLSEM 0x0000018c
- #define NV_SW_VBLSEM_OFFSET 0x00000400
- #define NV_SW_VBLSEM_RELEASE_VALUE 0x00000404
- #define NV_SW_VBLSEM_RELEASE 0x00000408
- #define NV_SW_PAGE_FLIP 0x00000500
- #endif
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