1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
450 lines
12 KiB
C
450 lines
12 KiB
C
/*-*- linux-c -*-
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* linux/drivers/video/i810_accel.c -- Hardware Acceleration
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*
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* Copyright (C) 2001 Antonino Daplas<adaplas@pol.net>
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* All Rights Reserved
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/fb.h>
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#include "i810_regs.h"
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#include "i810.h"
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static u32 i810fb_rop[] = {
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COLOR_COPY_ROP, /* ROP_COPY */
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XOR_ROP /* ROP_XOR */
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};
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/* Macros */
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#define PUT_RING(n) { \
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i810_writel(par->cur_tail, par->iring.virtual, n); \
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par->cur_tail += 4; \
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par->cur_tail &= RING_SIZE_MASK; \
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}
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extern void flush_cache(void);
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/************************************************************/
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/* BLT Engine Routines */
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static inline void i810_report_error(u8 __iomem *mmio)
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{
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printk("IIR : 0x%04x\n"
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"EIR : 0x%04x\n"
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"PGTBL_ER: 0x%04x\n"
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"IPEIR : 0x%04x\n"
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"IPEHR : 0x%04x\n",
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i810_readw(IIR, mmio),
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i810_readb(EIR, mmio),
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i810_readl(PGTBL_ER, mmio),
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i810_readl(IPEIR, mmio),
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i810_readl(IPEHR, mmio));
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}
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/**
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* wait_for_space - check ring buffer free space
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* @space: amount of ringbuffer space needed in bytes
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* @par: pointer to i810fb_par structure
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*
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* DESCRIPTION:
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* The function waits until a free space from the ringbuffer
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* is available
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*/
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static inline int wait_for_space(struct fb_info *info, u32 space)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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u32 head, count = WAIT_COUNT, tail;
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u8 __iomem *mmio = par->mmio_start_virtual;
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tail = par->cur_tail;
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while (count--) {
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head = i810_readl(IRING + 4, mmio) & RBUFFER_HEAD_MASK;
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if ((tail == head) ||
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(tail > head &&
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(par->iring.size - tail + head) >= space) ||
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(tail < head && (head - tail) >= space)) {
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return 0;
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}
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}
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printk("ringbuffer lockup!!!\n");
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i810_report_error(mmio);
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par->dev_flags |= LOCKUP;
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info->pixmap.scan_align = 1;
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return 1;
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}
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/**
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* wait_for_engine_idle - waits for all hardware engines to finish
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* @par: pointer to i810fb_par structure
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*
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* DESCRIPTION:
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* This waits for lring(0), iring(1), and batch(3), etc to finish and
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* waits until ringbuffer is empty.
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*/
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static inline int wait_for_engine_idle(struct fb_info *info)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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u8 __iomem *mmio = par->mmio_start_virtual;
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int count = WAIT_COUNT;
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if (wait_for_space(info, par->iring.size)) /* flush */
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return 1;
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while((i810_readw(INSTDONE, mmio) & 0x7B) != 0x7B && --count);
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if (count) return 0;
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printk("accel engine lockup!!!\n");
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printk("INSTDONE: 0x%04x\n", i810_readl(INSTDONE, mmio));
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i810_report_error(mmio);
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par->dev_flags |= LOCKUP;
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info->pixmap.scan_align = 1;
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return 1;
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}
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/* begin_iring - prepares the ringbuffer
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* @space: length of sequence in dwords
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* @par: pointer to i810fb_par structure
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*
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* DESCRIPTION:
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* Checks/waits for sufficent space in ringbuffer of size
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* space. Returns the tail of the buffer
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*/
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static inline u32 begin_iring(struct fb_info *info, u32 space)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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if (par->dev_flags & ALWAYS_SYNC)
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wait_for_engine_idle(info);
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return wait_for_space(info, space);
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}
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/**
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* end_iring - advances the buffer
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* @par: pointer to i810fb_par structure
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*
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* DESCRIPTION:
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* This advances the tail of the ringbuffer, effectively
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* beginning the execution of the graphics instruction sequence.
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*/
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static inline void end_iring(struct i810fb_par *par)
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{
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u8 __iomem *mmio = par->mmio_start_virtual;
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i810_writel(IRING, mmio, par->cur_tail);
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}
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/**
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* source_copy_blit - BLIT transfer operation
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* @dwidth: width of rectangular graphics data
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* @dheight: height of rectangular graphics data
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* @dpitch: bytes per line of destination buffer
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* @xdir: direction of copy (left to right or right to left)
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* @src: address of first pixel to read from
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* @dest: address of first pixel to write to
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* @from: source address
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* @where: destination address
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* @rop: raster operation
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* @blit_bpp: pixel format which can be different from the
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* framebuffer's pixelformat
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* @par: pointer to i810fb_par structure
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*
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* DESCRIPTION:
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* This is a BLIT operation typically used when doing
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* a 'Copy and Paste'
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*/
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static inline void source_copy_blit(int dwidth, int dheight, int dpitch,
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int xdir, int src, int dest, int rop,
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int blit_bpp, struct fb_info *info)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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if (begin_iring(info, 24 + IRING_PAD)) return;
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PUT_RING(BLIT | SOURCE_COPY_BLIT | 4);
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PUT_RING(xdir | rop << 16 | dpitch | DYN_COLOR_EN | blit_bpp);
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PUT_RING(dheight << 16 | dwidth);
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PUT_RING(dest);
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PUT_RING(dpitch);
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PUT_RING(src);
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end_iring(par);
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}
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/**
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* color_blit - solid color BLIT operation
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* @width: width of destination
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* @height: height of destination
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* @pitch: pixels per line of the buffer
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* @dest: address of first pixel to write to
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* @where: destination
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* @rop: raster operation
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* @what: color to transfer
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* @blit_bpp: pixel format which can be different from the
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* framebuffer's pixelformat
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* @par: pointer to i810fb_par structure
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*
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* DESCRIPTION:
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* A BLIT operation which can be used for color fill/rectangular fill
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*/
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static inline void color_blit(int width, int height, int pitch, int dest,
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int rop, int what, int blit_bpp,
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struct fb_info *info)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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if (begin_iring(info, 24 + IRING_PAD)) return;
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PUT_RING(BLIT | COLOR_BLT | 3);
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PUT_RING(rop << 16 | pitch | SOLIDPATTERN | DYN_COLOR_EN | blit_bpp);
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PUT_RING(height << 16 | width);
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PUT_RING(dest);
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PUT_RING(what);
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PUT_RING(NOP);
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end_iring(par);
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}
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/**
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* mono_src_copy_imm_blit - color expand from system memory to framebuffer
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* @dwidth: width of destination
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* @dheight: height of destination
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* @dpitch: pixels per line of the buffer
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* @dsize: size of bitmap in double words
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* @dest: address of first byte of pixel;
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* @rop: raster operation
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* @blit_bpp: pixelformat to use which can be different from the
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* framebuffer's pixelformat
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* @src: address of image data
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* @bg: backgound color
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* @fg: forground color
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* @par: pointer to i810fb_par structure
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*
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* DESCRIPTION:
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* A color expand operation where the source data is placed in the
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* ringbuffer itself. Useful for drawing text.
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*
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* REQUIREMENT:
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* The end of a scanline must be padded to the next word.
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*/
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static inline void mono_src_copy_imm_blit(int dwidth, int dheight, int dpitch,
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int dsize, int blit_bpp, int rop,
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int dest, const u32 *src, int bg,
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int fg, struct fb_info *info)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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if (begin_iring(info, 24 + (dsize << 2) + IRING_PAD)) return;
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PUT_RING(BLIT | MONO_SOURCE_COPY_IMMEDIATE | (4 + dsize));
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PUT_RING(DYN_COLOR_EN | blit_bpp | rop << 16 | dpitch);
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PUT_RING(dheight << 16 | dwidth);
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PUT_RING(dest);
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PUT_RING(bg);
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PUT_RING(fg);
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while (dsize--)
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PUT_RING(*src++);
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end_iring(par);
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}
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static inline void load_front(int offset, struct fb_info *info)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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if (begin_iring(info, 8 + IRING_PAD)) return;
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PUT_RING(PARSER | FLUSH);
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PUT_RING(NOP);
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end_iring(par);
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if (begin_iring(info, 8 + IRING_PAD)) return;
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PUT_RING(PARSER | FRONT_BUFFER | ((par->pitch >> 3) << 8));
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PUT_RING((par->fb.offset << 12) + offset);
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end_iring(par);
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}
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/**
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* i810fb_iring_enable - enables/disables the ringbuffer
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* @mode: enable or disable
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* @par: pointer to i810fb_par structure
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*
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* DESCRIPTION:
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* Enables or disables the ringbuffer, effectively enabling or
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* disabling the instruction/acceleration engine.
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*/
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static inline void i810fb_iring_enable(struct i810fb_par *par, u32 mode)
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{
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u32 tmp;
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u8 __iomem *mmio = par->mmio_start_virtual;
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tmp = i810_readl(IRING + 12, mmio);
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if (mode == OFF)
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tmp &= ~1;
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else
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tmp |= 1;
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flush_cache();
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i810_writel(IRING + 12, mmio, tmp);
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}
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void i810fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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u32 dx, dy, width, height, dest, rop = 0, color = 0;
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if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
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par->depth == 4)
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return cfb_fillrect(info, rect);
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if (par->depth == 1)
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color = rect->color;
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else
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color = ((u32 *) (info->pseudo_palette))[rect->color];
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rop = i810fb_rop[rect->rop];
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dx = rect->dx * par->depth;
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width = rect->width * par->depth;
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dy = rect->dy;
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height = rect->height;
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dest = info->fix.smem_start + (dy * info->fix.line_length) + dx;
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color_blit(width, height, info->fix.line_length, dest, rop, color,
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par->blit_bpp, info);
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}
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void i810fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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u32 sx, sy, dx, dy, pitch, width, height, src, dest, xdir;
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if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
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par->depth == 4)
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return cfb_copyarea(info, region);
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dx = region->dx * par->depth;
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sx = region->sx * par->depth;
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width = region->width * par->depth;
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sy = region->sy;
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dy = region->dy;
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height = region->height;
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if (dx <= sx) {
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xdir = INCREMENT;
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}
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else {
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xdir = DECREMENT;
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sx += width - 1;
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dx += width - 1;
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}
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if (dy <= sy) {
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pitch = info->fix.line_length;
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}
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else {
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pitch = (-(info->fix.line_length)) & 0xFFFF;
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sy += height - 1;
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dy += height - 1;
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}
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src = info->fix.smem_start + (sy * info->fix.line_length) + sx;
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dest = info->fix.smem_start + (dy * info->fix.line_length) + dx;
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source_copy_blit(width, height, pitch, xdir, src, dest,
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PAT_COPY_ROP, par->blit_bpp, info);
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}
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void i810fb_imageblit(struct fb_info *info, const struct fb_image *image)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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u32 fg = 0, bg = 0, size, dst;
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if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
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par->depth == 4 || image->depth != 1)
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return cfb_imageblit(info, image);
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switch (info->var.bits_per_pixel) {
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case 8:
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fg = image->fg_color;
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bg = image->bg_color;
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break;
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case 16:
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case 24:
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fg = ((u32 *)(info->pseudo_palette))[image->fg_color];
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bg = ((u32 *)(info->pseudo_palette))[image->bg_color];
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break;
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}
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dst = info->fix.smem_start + (image->dy * info->fix.line_length) +
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(image->dx * par->depth);
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size = (image->width+7)/8 + 1;
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size &= ~1;
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size *= image->height;
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size += 7;
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size &= ~7;
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mono_src_copy_imm_blit(image->width * par->depth,
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image->height, info->fix.line_length,
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size/4, par->blit_bpp,
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PAT_COPY_ROP, dst, (u32 *) image->data,
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bg, fg, info);
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}
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int i810fb_sync(struct fb_info *info)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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if (!info->var.accel_flags || par->dev_flags & LOCKUP)
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return 0;
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return wait_for_engine_idle(info);
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}
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void i810fb_load_front(u32 offset, struct fb_info *info)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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u8 __iomem *mmio = par->mmio_start_virtual;
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if (!info->var.accel_flags || par->dev_flags & LOCKUP)
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i810_writel(DPLYBASE, mmio, par->fb.physical + offset);
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else
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load_front(offset, info);
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}
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/**
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* i810fb_init_ringbuffer - initialize the ringbuffer
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* @par: pointer to i810fb_par structure
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*
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* DESCRIPTION:
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* Initializes the ringbuffer by telling the device the
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* size and location of the ringbuffer. It also sets
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* the head and tail pointers = 0
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*/
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void i810fb_init_ringbuffer(struct fb_info *info)
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{
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struct i810fb_par *par = (struct i810fb_par *) info->par;
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u32 tmp1, tmp2;
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u8 __iomem *mmio = par->mmio_start_virtual;
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wait_for_engine_idle(info);
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i810fb_iring_enable(par, OFF);
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i810_writel(IRING, mmio, 0);
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i810_writel(IRING + 4, mmio, 0);
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par->cur_tail = 0;
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tmp2 = i810_readl(IRING + 8, mmio) & ~RBUFFER_START_MASK;
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tmp1 = par->iring.physical;
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i810_writel(IRING + 8, mmio, tmp2 | tmp1);
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tmp1 = i810_readl(IRING + 12, mmio);
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tmp1 &= ~RBUFFER_SIZE_MASK;
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tmp2 = (par->iring.size - I810_PAGESIZE) & RBUFFER_SIZE_MASK;
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i810_writel(IRING + 12, mmio, tmp1 | tmp2);
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i810fb_iring_enable(par, ON);
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}
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