/*-*- linux-c -*-
* linux/drivers/video/i810_accel.c -- Hardware Acceleration
*
* Copyright (C) 2001 Antonino Daplas<adaplas@pol.net>
* All Rights Reserved
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/fb.h>
#include "i810_regs.h"
#include "i810.h"
#include "i810_main.h"
static u32 i810fb_rop[] = {
COLOR_COPY_ROP, /* ROP_COPY */
XOR_ROP /* ROP_XOR */
};
/* Macros */
#define PUT_RING(n) { \
i810_writel(par->cur_tail, par->iring.virtual, n); \
par->cur_tail += 4; \
par->cur_tail &= RING_SIZE_MASK; \
}
extern void flush_cache(void);
/************************************************************/
/* BLT Engine Routines */
static inline void i810_report_error(u8 __iomem *mmio)
{
printk("IIR : 0x%04x\n"
"EIR : 0x%04x\n"
"PGTBL_ER: 0x%04x\n"
"IPEIR : 0x%04x\n"
"IPEHR : 0x%04x\n",
i810_readw(IIR, mmio),
i810_readb(EIR, mmio),
i810_readl(PGTBL_ER, mmio),
i810_readl(IPEIR, mmio),
i810_readl(IPEHR, mmio));
}
/**
* wait_for_space - check ring buffer free space
* @space: amount of ringbuffer space needed in bytes
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* The function waits until a free space from the ringbuffer
* is available
*/
static inline int wait_for_space(struct fb_info *info, u32 space)
{
struct i810fb_par *par = info->par;
u32 head, count = WAIT_COUNT, tail;
u8 __iomem *mmio = par->mmio_start_virtual;
tail = par->cur_tail;
while (count--) {
head = i810_readl(IRING + 4, mmio) & RBUFFER_HEAD_MASK;
if ((tail == head) ||
(tail > head &&
(par->iring.size - tail + head) >= space) ||
(tail < head && (head - tail) >= space)) {
return 0;
}
}
printk("ringbuffer lockup!!!\n");
i810_report_error(mmio);
par->dev_flags |= LOCKUP;
info->pixmap.scan_align = 1;
return 1;
}
/**
* wait_for_engine_idle - waits for all hardware engines to finish
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* This waits for lring(0), iring(1), and batch(3), etc to finish and
* waits until ringbuffer is empty.
*/
static inline int wait_for_engine_idle(struct fb_info *info)
{
struct i810fb_par *par = info->par;
u8 __iomem *mmio = par->mmio_start_virtual;
int count = WAIT_COUNT;
if (wait_for_space(info, par->iring.size)) /* flush */
return 1;
while((i810_readw(INSTDONE, mmio) & 0x7B) != 0x7B && --count);
if (count) return 0;
printk("accel engine lockup!!!\n");
printk("INSTDONE: 0x%04x\n", i810_readl(INSTDONE, mmio));
i810_report_error(mmio);
par->dev_flags |= LOCKUP;
info->pixmap.scan_align = 1;
return 1;
}
/* begin_iring - prepares the ringbuffer
* @space: length of sequence in dwords
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Checks/waits for sufficent space in ringbuffer of size
* space. Returns the tail of the buffer
*/
static inline u32 begin_iring(struct fb_info *info, u32 space)
{
struct i810fb_par *par = info->par;
if (par->dev_flags & ALWAYS_SYNC)
wait_for_engine_idle(info);
return wait_for_space(info, space);
}
/**
* end_iring - advances the buffer
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* This advances the tail of the ringbuffer, effectively
* beginning the execution of the graphics instruction sequence.
*/
static inline void end_iring(struct i810fb_par *par)
{
u8 __iomem *mmio = par->mmio_start_virtual;
i810_writel(IRING, mmio, par->cur_tail);
}
/**
* source_copy_blit - BLIT transfer operation
* @dwidth: width of rectangular graphics data
* @dheight: height of rectangular graphics data
* @dpitch: bytes per line of destination buffer
* @xdir: direction of copy (left to right or right to left)
* @src: address of first pixel to read from
* @dest: address of first pixel to write to
* @from: source address
* @where: destination address
* @rop: raster operation
* @blit_bpp: pixel format which can be different from the
* framebuffer's pixelformat
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* This is a BLIT operation typically used when doing
* a 'Copy and Paste'
*/
static inline void source_copy_blit(int dwidth, int dheight, int dpitch,
int xdir, int src, int dest, int rop,
int blit_bpp, struct fb_info *info)
{
struct i810fb_par *par = info->par;
if (begin_iring(info, 24 + IRING_PAD)) return;
PUT_RING(BLIT | SOURCE_COPY_BLIT | 4);
PUT_RING(xdir | rop << 16 | dpitch | DYN_COLOR_EN | blit_bpp);
PUT_RING(dheight << 16 | dwidth);
PUT_RING(dest);
PUT_RING(dpitch);
PUT_RING(src);
end_iring(par);
}
/**
* color_blit - solid color BLIT operation
* @width: width of destination
* @height: height of destination
* @pitch: pixels per line of the buffer
* @dest: address of first pixel to write to
* @where: destination
* @rop: raster operation
* @what: color to transfer
* @blit_bpp: pixel format which can be different from the
* framebuffer's pixelformat
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* A BLIT operation which can be used for color fill/rectangular fill
*/
static inline void color_blit(int width, int height, int pitch, int dest,
int rop, int what, int blit_bpp,
struct fb_info *info)
{
struct i810fb_par *par = info->par;
if (begin_iring(info, 24 + IRING_PAD)) return;
PUT_RING(BLIT | COLOR_BLT | 3);
PUT_RING(rop << 16 | pitch | SOLIDPATTERN | DYN_COLOR_EN | blit_bpp);
PUT_RING(height << 16 | width);
PUT_RING(dest);
PUT_RING(what);
PUT_RING(NOP);
end_iring(par);
}
/**
* mono_src_copy_imm_blit - color expand from system memory to framebuffer
* @dwidth: width of destination
* @dheight: height of destination
* @dpitch: pixels per line of the buffer
* @dsize: size of bitmap in double words
* @dest: address of first byte of pixel;
* @rop: raster operation
* @blit_bpp: pixelformat to use which can be different from the
* framebuffer's pixelformat
* @src: address of image data
* @bg: backgound color
* @fg: forground color
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* A color expand operation where the source data is placed in the
* ringbuffer itself. Useful for drawing text.
*
* REQUIREMENT:
* The end of a scanline must be padded to the next word.
*/
static inline void mono_src_copy_imm_blit(int dwidth, int dheight, int dpitch,
int dsize, int blit_bpp, int rop,
int dest, const u32 *src, int bg,
int fg, struct fb_info *info)
{
struct i810fb_par *par = info->par;
if (begin_iring(info, 24 + (dsize << 2) + IRING_PAD)) return;
PUT_RING(BLIT | MONO_SOURCE_COPY_IMMEDIATE | (4 + dsize));
PUT_RING(DYN_COLOR_EN | blit_bpp | rop << 16 | dpitch);
PUT_RING(dheight << 16 | dwidth);
PUT_RING(dest);
PUT_RING(bg);
PUT_RING(fg);
while (dsize--)
PUT_RING(*src++);
end_iring(par);
}
static inline void load_front(int offset, struct fb_info *info)
{
struct i810fb_par *par = info->par;
if (begin_iring(info, 8 + IRING_PAD)) return;
PUT_RING(PARSER | FLUSH);
PUT_RING(NOP);
end_iring(par);
if (begin_iring(info, 8 + IRING_PAD)) return;
PUT_RING(PARSER | FRONT_BUFFER | ((par->pitch >> 3) << 8));
PUT_RING((par->fb.offset << 12) + offset);
end_iring(par);
}
/**
* i810fb_iring_enable - enables/disables the ringbuffer
* @mode: enable or disable
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Enables or disables the ringbuffer, effectively enabling or
* disabling the instruction/acceleration engine.
*/
static inline void i810fb_iring_enable(struct i810fb_par *par, u32 mode)
{
u32 tmp;
u8 __iomem *mmio = par->mmio_start_virtual;
tmp = i810_readl(IRING + 12, mmio);
if (mode == OFF)
tmp &= ~1;
else
tmp |= 1;
flush_cache();
i810_writel(IRING + 12, mmio, tmp);
}
void i810fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
struct i810fb_par *par = info->par;
u32 dx, dy, width, height, dest, rop = 0, color = 0;
if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
par->depth == 4)
return cfb_fillrect(info, rect);
if (par->depth == 1)
color = rect->color;
else
color = ((u32 *) (info->pseudo_palette))[rect->color];
rop = i810fb_rop[rect->rop];
dx = rect->dx * par->depth;
width = rect->width * par->depth;
dy = rect->dy;
height = rect->height;
dest = info->fix.smem_start + (dy * info->fix.line_length) + dx;
color_blit(width, height, info->fix.line_length, dest, rop, color,
par->blit_bpp, info);
}
void i810fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
{
struct i810fb_par *par = info->par;
u32 sx, sy, dx, dy, pitch, width, height, src, dest, xdir;
if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
par->depth == 4)
return cfb_copyarea(info, region);
dx = region->dx * par->depth;
sx = region->sx * par->depth;
width = region->width * par->depth;
sy = region->sy;
dy = region->dy;
height = region->height;
if (dx <= sx) {
xdir = INCREMENT;
}
else {
xdir = DECREMENT;
sx += width - 1;
dx += width - 1;
}
if (dy <= sy) {
pitch = info->fix.line_length;
}
else {
pitch = (-(info->fix.line_length)) & 0xFFFF;
sy += height - 1;
dy += height - 1;
}
src = info->fix.smem_start + (sy * info->fix.line_length) + sx;
dest = info->fix.smem_start + (dy * info->fix.line_length) + dx;
source_copy_blit(width, height, pitch, xdir, src, dest,
PAT_COPY_ROP, par->blit_bpp, info);
}
void i810fb_imageblit(struct fb_info *info, const struct fb_image *image)
{
struct i810fb_par *par = info->par;
u32 fg = 0, bg = 0, size, dst;
if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
par->depth == 4 || image->depth != 1)
return cfb_imageblit(info, image);
switch (info->var.bits_per_pixel) {
case 8:
fg = image->fg_color;
bg = image->bg_color;
break;
case 16:
case 24:
fg = ((u32 *)(info->pseudo_palette))[image->fg_color];
bg = ((u32 *)(info->pseudo_palette))[image->bg_color];
break;
}
dst = info->fix.smem_start + (image->dy * info->fix.line_length) +
(image->dx * par->depth);
size = (image->width+7)/8 + 1;
size &= ~1;
size *= image->height;
size += 7;
size &= ~7;
mono_src_copy_imm_blit(image->width * par->depth,
image->height, info->fix.line_length,
size/4, par->blit_bpp,
PAT_COPY_ROP, dst, (u32 *) image->data,
bg, fg, info);
}
int i810fb_sync(struct fb_info *info)
{
struct i810fb_par *par = info->par;
if (!info->var.accel_flags || par->dev_flags & LOCKUP)
return 0;
return wait_for_engine_idle(info);
}
void i810fb_load_front(u32 offset, struct fb_info *info)
{
struct i810fb_par *par = info->par;
u8 __iomem *mmio = par->mmio_start_virtual;
if (!info->var.accel_flags || par->dev_flags & LOCKUP)
i810_writel(DPLYBASE, mmio, par->fb.physical + offset);
else
load_front(offset, info);
}
/**
* i810fb_init_ringbuffer - initialize the ringbuffer
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Initializes the ringbuffer by telling the device the
* size and location of the ringbuffer. It also sets
* the head and tail pointers = 0
*/
void i810fb_init_ringbuffer(struct fb_info *info)
{
struct i810fb_par *par = info->par;
u32 tmp1, tmp2;
u8 __iomem *mmio = par->mmio_start_virtual;
wait_for_engine_idle(info);
i810fb_iring_enable(par, OFF);
i810_writel(IRING, mmio, 0);
i810_writel(IRING + 4, mmio, 0);
par->cur_tail = 0;
tmp2 = i810_readl(IRING + 8, mmio) & ~RBUFFER_START_MASK;
tmp1 = par->iring.physical;
i810_writel(IRING + 8, mmio, tmp2 | tmp1);
tmp1 = i810_readl(IRING + 12, mmio);
tmp1 &= ~RBUFFER_SIZE_MASK;
tmp2 = (par->iring.size - I810_PAGESIZE) & RBUFFER_SIZE_MASK;
i810_writel(IRING + 12, mmio, tmp1 | tmp2);
i810fb_iring_enable(par, ON);
}
