drivers/gpu/drm/nouveau/nouveau_dma.h - kernel/msm-4.9 - Gitiles

 /*
  * 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 *, struct nouveau_bo *,
 		   int delta, 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)

 /* Hardcoded object assignments to subchannels (subchannel id). */
 enum {
 	NvSubCtxSurf2D  = 0,
 	NvSubSw		= 1,
 	NvSubImageBlit  = 2,
 	NvSubGdiRect    = 3,

 	NvSub2D		= 3, /* DO NOT CHANGE - hardcoded for kepler gr fifo */
 	NvSubCopy	= 4, /* DO NOT CHANGE - hardcoded for kepler gr fifo */
 	FermiSw		= 5, /* DO NOT CHANGE (well.. 6/7 will work...) */
 };

 /* Object handles - for stuff that's doesn't use handle == oclass. */
 enum {
 	NvDmaFB		= 0x80000002,
 	NvDmaTT		= 0x80000003,
 	NvNotify0       = 0x80000006,
 	NvSema		= 0x8000000f,
 	NvEvoSema0	= 0x80000010,
 	NvEvoSema1	= 0x80000011,
 };

 #define NV_MEMORY_TO_MEMORY_FORMAT                                    0x00000039
 #define NV_MEMORY_TO_MEMORY_FORMAT_NAME                               0x00000000
 #define NV_MEMORY_TO_MEMORY_FORMAT_SET_REF                            0x00000050
 #define NV_MEMORY_TO_MEMORY_FORMAT_NOP                                0x00000100
 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY                             0x00000104
 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY_STYLE_WRITE                 0x00000000
 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY_STYLE_WRITE_LE_AWAKEN       0x00000001
 #define NV_MEMORY_TO_MEMORY_FORMAT_DMA_NOTIFY                         0x00000180
 #define NV_MEMORY_TO_MEMORY_FORMAT_DMA_SOURCE                         0x00000184
 #define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN                          0x0000030c

 #define NV50_MEMORY_TO_MEMORY_FORMAT                                  0x00005039
 #define NV50_MEMORY_TO_MEMORY_FORMAT_UNK200                           0x00000200
 #define NV50_MEMORY_TO_MEMORY_FORMAT_UNK21C                           0x0000021c
 #define NV50_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN_HIGH                   0x00000238
 #define NV50_MEMORY_TO_MEMORY_FORMAT_OFFSET_OUT_HIGH                  0x0000023c

 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);
 }

 extern void
 OUT_RINGp(struct nouveau_channel *chan, const void *data, unsigned nr_dwords);

 static inline void
 BEGIN_NV04(struct nouveau_channel *chan, int subc, int mthd, int size)
 {
 	OUT_RING(chan, 0x00000000 | (subc << 13) | (size << 18) | mthd);
 }

 static inline void
 BEGIN_NI04(struct nouveau_channel *chan, int subc, int mthd, int size)
 {
 	OUT_RING(chan, 0x40000000 | (subc << 13) | (size << 18) | mthd);
 }

 static inline void
 BEGIN_NVC0(struct nouveau_channel *chan, int subc, int mthd, int size)
 {
 	OUT_RING(chan, 0x20000000 | (size << 16) | (subc << 13) | (mthd >> 2));
 }

 static inline void
 BEGIN_NIC0(struct nouveau_channel *chan, int subc, int mthd, int size)
 {
 	OUT_RING(chan, 0x60000000 | (size << 16) | (subc << 13) | (mthd >> 2));
 }

 static inline void
 BEGIN_IMC0(struct nouveau_channel *chan, int subc, int mthd, u16 data)
 {
 	OUT_RING(chan, 0x80000000 | (data << 16) | (subc << 13) | (mthd >> 2));
 }

 #define WRITE_PUT(val) do {                                                    \
 	mb();                                                   \
 	nouveau_bo_rd32(chan->push.buffer, 0);                                 \
 	nvif_wr32(chan, chan->user_put, ((val) << 2) + chan->push.vma.offset); \
 } 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.buffer, 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;
 }

 /* FIFO methods */
 #define NV01_SUBCHAN_OBJECT                                          0x00000000
 #define NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH                          0x00000010
 #define NV84_SUBCHAN_SEMAPHORE_ADDRESS_LOW                           0x00000014
 #define NV84_SUBCHAN_SEMAPHORE_SEQUENCE                              0x00000018
 #define NV84_SUBCHAN_SEMAPHORE_TRIGGER                               0x0000001c
 #define NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_EQUAL                 0x00000001
 #define NV84_SUBCHAN_SEMAPHORE_TRIGGER_WRITE_LONG                    0x00000002
 #define NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_GEQUAL                0x00000004
 #define NVC0_SUBCHAN_SEMAPHORE_TRIGGER_YIELD                         0x00001000
 #define NV84_SUBCHAN_UEVENT                                          0x00000020
 #define NV84_SUBCHAN_WRCACHE_FLUSH                                   0x00000024
 #define NV10_SUBCHAN_REF_CNT                                         0x00000050
 #define NV11_SUBCHAN_DMA_SEMAPHORE                                   0x00000060
 #define NV11_SUBCHAN_SEMAPHORE_OFFSET                                0x00000064
 #define NV11_SUBCHAN_SEMAPHORE_ACQUIRE                               0x00000068
 #define NV11_SUBCHAN_SEMAPHORE_RELEASE                               0x0000006c
 #define NV40_SUBCHAN_YIELD                                           0x00000080

 /* 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
	/*
	* 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 , struct nouveau_bo ,
	int delta, 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)

	/* Hardcoded object assignments to subchannels (subchannel id). */
	enum {
	NvSubCtxSurf2D = 0,
	NvSubSw = 1,
	NvSubImageBlit = 2,
	NvSubGdiRect = 3,

	NvSub2D = 3, /* DO NOT CHANGE - hardcoded for kepler gr fifo */
	NvSubCopy = 4, /* DO NOT CHANGE - hardcoded for kepler gr fifo */
	FermiSw = 5, /* DO NOT CHANGE (well.. 6/7 will work...) */
	};

	/* Object handles - for stuff that's doesn't use handle == oclass. */
	enum {
	NvDmaFB = 0x80000002,
	NvDmaTT = 0x80000003,
	NvNotify0 = 0x80000006,
	NvSema = 0x8000000f,
	NvEvoSema0 = 0x80000010,
	NvEvoSema1 = 0x80000011,
	};

	#define NV_MEMORY_TO_MEMORY_FORMAT 0x00000039
	#define NV_MEMORY_TO_MEMORY_FORMAT_NAME 0x00000000
	#define NV_MEMORY_TO_MEMORY_FORMAT_SET_REF 0x00000050
	#define NV_MEMORY_TO_MEMORY_FORMAT_NOP 0x00000100
	#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104
	#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY_STYLE_WRITE 0x00000000
	#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY_STYLE_WRITE_LE_AWAKEN 0x00000001
	#define NV_MEMORY_TO_MEMORY_FORMAT_DMA_NOTIFY 0x00000180
	#define NV_MEMORY_TO_MEMORY_FORMAT_DMA_SOURCE 0x00000184
	#define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c

	#define NV50_MEMORY_TO_MEMORY_FORMAT 0x00005039
	#define NV50_MEMORY_TO_MEMORY_FORMAT_UNK200 0x00000200
	#define NV50_MEMORY_TO_MEMORY_FORMAT_UNK21C 0x0000021c
	#define NV50_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN_HIGH 0x00000238
	#define NV50_MEMORY_TO_MEMORY_FORMAT_OFFSET_OUT_HIGH 0x0000023c

	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);
	}

	extern void
	OUT_RINGp(struct nouveau_channel chan, const void data, unsigned nr_dwords);

	static inline void
	BEGIN_NV04(struct nouveau_channel *chan, int subc, int mthd, int size)
	{
	OUT_RING(chan, 0x00000000 \| (subc << 13) \| (size << 18) \| mthd);
	}

	static inline void
	BEGIN_NI04(struct nouveau_channel *chan, int subc, int mthd, int size)
	{
	OUT_RING(chan, 0x40000000 \| (subc << 13) \| (size << 18) \| mthd);
	}

	static inline void
	BEGIN_NVC0(struct nouveau_channel *chan, int subc, int mthd, int size)
	{
	OUT_RING(chan, 0x20000000 \| (size << 16) \| (subc << 13) \| (mthd >> 2));
	}

	static inline void
	BEGIN_NIC0(struct nouveau_channel *chan, int subc, int mthd, int size)
	{
	OUT_RING(chan, 0x60000000 \| (size << 16) \| (subc << 13) \| (mthd >> 2));
	}

	static inline void
	BEGIN_IMC0(struct nouveau_channel *chan, int subc, int mthd, u16 data)
	{
	OUT_RING(chan, 0x80000000 \| (data << 16) \| (subc << 13) \| (mthd >> 2));
	}

	#define WRITE_PUT(val) do { \
	mb(); \
	nouveau_bo_rd32(chan->push.buffer, 0); \
	nvif_wr32(chan, chan->user_put, ((val) << 2) + chan->push.vma.offset); \
	} 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.buffer, 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;
	}

	/* FIFO methods */
	#define NV01_SUBCHAN_OBJECT 0x00000000
	#define NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH 0x00000010
	#define NV84_SUBCHAN_SEMAPHORE_ADDRESS_LOW 0x00000014
	#define NV84_SUBCHAN_SEMAPHORE_SEQUENCE 0x00000018
	#define NV84_SUBCHAN_SEMAPHORE_TRIGGER 0x0000001c
	#define NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_EQUAL 0x00000001
	#define NV84_SUBCHAN_SEMAPHORE_TRIGGER_WRITE_LONG 0x00000002
	#define NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_GEQUAL 0x00000004
	#define NVC0_SUBCHAN_SEMAPHORE_TRIGGER_YIELD 0x00001000
	#define NV84_SUBCHAN_UEVENT 0x00000020
	#define NV84_SUBCHAN_WRCACHE_FLUSH 0x00000024
	#define NV10_SUBCHAN_REF_CNT 0x00000050
	#define NV11_SUBCHAN_DMA_SEMAPHORE 0x00000060
	#define NV11_SUBCHAN_SEMAPHORE_OFFSET 0x00000064
	#define NV11_SUBCHAN_SEMAPHORE_ACQUIRE 0x00000068
	#define NV11_SUBCHAN_SEMAPHORE_RELEASE 0x0000006c
	#define NV40_SUBCHAN_YIELD 0x00000080

	/* 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