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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/video/i810/i810_accel.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
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!
Diffstat (limited to 'drivers/video/i810/i810_accel.c')
-rw-r--r-- | drivers/video/i810/i810_accel.c | 449 |
1 files changed, 449 insertions, 0 deletions
diff --git a/drivers/video/i810/i810_accel.c b/drivers/video/i810/i810_accel.c new file mode 100644 index 0000000..64cd1c8 --- /dev/null +++ b/drivers/video/i810/i810_accel.c @@ -0,0 +1,449 @@ +/*-*- 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" + +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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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); +} |