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Diffstat (limited to 'src/ffb_fifo.h')
| -rw-r--r-- | src/ffb_fifo.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/ffb_fifo.h b/src/ffb_fifo.h new file mode 100644 index 0000000..0957e84 --- /dev/null +++ b/src/ffb_fifo.h @@ -0,0 +1,69 @@ +/* + * Acceleration for the Creator and Creator3D framebuffer - fifo macros. + * + * Copyright (C) 1998,1999 Jakub Jelinek (jakub@redhat.com) + * Copyright (C) 1999 David S. Miller (davem@redhat.com) + * + * 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 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 + * JAKUB JELINEK OR DAVID MILLER 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. + */ +/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/sunffb/ffb_fifo.h,v 1.2 2000/05/23 04:47:44 dawes Exp $ */ + +#ifndef FFBFIFO_H +#define FFBFIFO_H + +#include "ffb.h" + +/* This is the smallest FFB fifo size I know of. -DaveM */ +#define FFB_FIFO_MIN 124 + +#define FFBFifo(__fpriv, __n) \ +do { int __cur_slots = (__fpriv)->fifo_cache; \ + if((__cur_slots - (__n)) < 0) { \ + ffb_fbcPtr __ffb = pFfb->regs; \ + do { __cur_slots = (((int)__ffb->ucsr & FFB_UCSR_FIFO_MASK) - 4); \ + } while((__cur_slots - (__n)) < 0); \ + } (__fpriv)->fifo_cache = (__cur_slots - (__n)); \ +} while(0) + +/* While we are polling for the raster processor to idle, cache the + * fifo count as well. + */ +#define FFBWait(__fpriv, __ffb) \ +if ((__fpriv)->rp_active != 0) { \ + unsigned int __regval = (__ffb)->ucsr; \ + while((__regval & FFB_UCSR_RP_BUSY) != 0) { \ + __regval = (__ffb)->ucsr; \ + } \ + (__fpriv)->fifo_cache = ((int)(__regval & FFB_UCSR_FIFO_MASK)) - 4; \ + (__fpriv)->rp_active = 0; \ +} while(0) + +/* DEBUGGING: You can use this if you suspect corruption is occuring + * because someone is touching the framebuffer while the + * raster processor is active. If you enable this and the + * problem goes away, odds are your suspicions are correct. + */ +#undef FORCE_WAIT_EVERY_ROP +#ifdef FORCE_WAIT_EVERY_ROP +#define FFBSync(__fpriv, __ffb) FFBWait(__fpriv, __ffb) +#else +#define FFBSync(__fpriv, __ffb) do { } while(0) +#endif + +#endif /* FFBFIFO_H */ |