--- /dev/null
+/*-*- 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 sufficient 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);
+}
Code Review / kvmfornfv.git / blobdiff