/*-*- 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) { cfb_fillrect(info, rect); return; } 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) { cfb_copyarea(info, region); return; } 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) { cfb_imageblit(info, image); return; } 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); }