1dbbd9e4bSmacallan/* 2dbbd9e4bSmacallan * Acceleration for the Creator and Creator3D framebuffer - fifo macros. 3dbbd9e4bSmacallan * 4dbbd9e4bSmacallan * Copyright (C) 1998,1999 Jakub Jelinek (jakub@redhat.com) 5dbbd9e4bSmacallan * Copyright (C) 1999 David S. Miller (davem@redhat.com) 6dbbd9e4bSmacallan * 7dbbd9e4bSmacallan * Permission is hereby granted, free of charge, to any person obtaining a copy 8dbbd9e4bSmacallan * of this software and associated documentation files (the "Software"), to deal 9dbbd9e4bSmacallan * in the Software without restriction, including without limitation the rights 10dbbd9e4bSmacallan * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11dbbd9e4bSmacallan * copies of the Software, and to permit persons to whom the Software is 12dbbd9e4bSmacallan * furnished to do so, subject to the following conditions: 13dbbd9e4bSmacallan * 14dbbd9e4bSmacallan * The above copyright notice and this permission notice shall be included in 15dbbd9e4bSmacallan * all copies or substantial portions of the Software. 16dbbd9e4bSmacallan * 17dbbd9e4bSmacallan * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18dbbd9e4bSmacallan * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19dbbd9e4bSmacallan * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20dbbd9e4bSmacallan * JAKUB JELINEK OR DAVID MILLER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21dbbd9e4bSmacallan * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22dbbd9e4bSmacallan * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 23dbbd9e4bSmacallan * IN THE SOFTWARE. 24dbbd9e4bSmacallan */ 25dbbd9e4bSmacallan 26dbbd9e4bSmacallan#ifndef FFBFIFO_H 27dbbd9e4bSmacallan#define FFBFIFO_H 28dbbd9e4bSmacallan 29dbbd9e4bSmacallan#include "ffb.h" 30dbbd9e4bSmacallan 31dbbd9e4bSmacallan/* This is the smallest FFB fifo size I know of. -DaveM */ 32dbbd9e4bSmacallan#define FFB_FIFO_MIN 124 33dbbd9e4bSmacallan 34dbbd9e4bSmacallan#define FFBFifo(__fpriv, __n) \ 35dbbd9e4bSmacallando { int __cur_slots = (__fpriv)->fifo_cache; \ 36dbbd9e4bSmacallan if((__cur_slots - (__n)) < 0) { \ 37dbbd9e4bSmacallan ffb_fbcPtr __ffb = pFfb->regs; \ 38dbbd9e4bSmacallan do { __cur_slots = (((int)__ffb->ucsr & FFB_UCSR_FIFO_MASK) - 4); \ 39dbbd9e4bSmacallan } while((__cur_slots - (__n)) < 0); \ 40dbbd9e4bSmacallan } (__fpriv)->fifo_cache = (__cur_slots - (__n)); \ 41dbbd9e4bSmacallan} while(0) 42dbbd9e4bSmacallan 43dbbd9e4bSmacallan/* While we are polling for the raster processor to idle, cache the 44dbbd9e4bSmacallan * fifo count as well. 45dbbd9e4bSmacallan */ 46dbbd9e4bSmacallan#define FFBWait(__fpriv, __ffb) \ 47dbbd9e4bSmacallanif ((__fpriv)->rp_active != 0) { \ 48dbbd9e4bSmacallan unsigned int __regval = (__ffb)->ucsr; \ 49dbbd9e4bSmacallan while((__regval & FFB_UCSR_RP_BUSY) != 0) { \ 50dbbd9e4bSmacallan __regval = (__ffb)->ucsr; \ 51dbbd9e4bSmacallan } \ 52dbbd9e4bSmacallan (__fpriv)->fifo_cache = ((int)(__regval & FFB_UCSR_FIFO_MASK)) - 4; \ 53dbbd9e4bSmacallan (__fpriv)->rp_active = 0; \ 54dbbd9e4bSmacallan} while(0) 55dbbd9e4bSmacallan 56cfa76ccdSmrg/* DEBUGGING: You can use this if you suspect corruption is occurring 57dbbd9e4bSmacallan * because someone is touching the framebuffer while the 58dbbd9e4bSmacallan * raster processor is active. If you enable this and the 59dbbd9e4bSmacallan * problem goes away, odds are your suspicions are correct. 60dbbd9e4bSmacallan */ 61dbbd9e4bSmacallan#undef FORCE_WAIT_EVERY_ROP 62dbbd9e4bSmacallan#ifdef FORCE_WAIT_EVERY_ROP 63dbbd9e4bSmacallan#define FFBSync(__fpriv, __ffb) FFBWait(__fpriv, __ffb) 64dbbd9e4bSmacallan#else 65dbbd9e4bSmacallan#define FFBSync(__fpriv, __ffb) do { } while(0) 66dbbd9e4bSmacallan#endif 67dbbd9e4bSmacallan 68dbbd9e4bSmacallan#endif /* FFBFIFO_H */ 69