pm2fb: accelerated fillrect and copyarea

This is a port of accelerated functions from 2.4 kernel.  Only fillrect and
copyarea are accelerated.  Fillrect is not accelerated in 24-bit mode.

[adaplas]
Add appropriate flags
Signed-off-by: NKrzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: NAntonino Daplas <adaplas@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/pm2fb.c

@@ -103,7 +103,7 @@ static struct fb_fix_screeninfo pm2fb_fix __devinitdata = {
 	.xpanstep =	1,
 	.ypanstep =	1,
 	.ywrapstep =	0, 
-	.accel =	FB_ACCEL_NONE,
+	.accel =	FB_ACCEL_3DLABS_PERMEDIA2,
 };
 
 /*
@@ -206,6 +206,17 @@ static inline void WAIT_FIFO(struct pm2fb_par* p, u32 a)
 }
 #endif
 
+static void wait_pm2(struct pm2fb_par* par) {
+
+	WAIT_FIFO(par, 1);
+	pm2_WR(par, PM2R_SYNC, 0);
+	mb();
+	do {
+		while (pm2_RD(par, PM2R_OUT_FIFO_WORDS) == 0);
+		rmb();
+	} while (pm2_RD(par, PM2R_OUT_FIFO) != PM2TAG(PM2R_SYNC));
+}
+
 /*
  * partial products for the supported horizontal resolutions.
  */
@@ -1041,6 +1052,117 @@ static int pm2fb_blank(int blank_mode, struct fb_info *info)
 	return 0;
 }
 
+/*
+ * block operation. copy=0: rectangle fill, copy=1: rectangle copy.
+ */
+static void pm2fb_block_op(struct pm2fb_par* par, int copy,
+				s32 xsrc, s32 ysrc,
+				s32 x, s32 y, s32 w, s32 h,
+				u32 color) {
+
+	if (!w || !h)
+		return;
+	WAIT_FIFO(par, 6);
+	pm2_WR(par, PM2R_CONFIG, PM2F_CONFIG_FB_WRITE_ENABLE |
+		PM2F_CONFIG_FB_READ_SOURCE_ENABLE);
+	pm2_WR(par, PM2R_FB_PIXEL_OFFSET, 0);
+	if (copy)
+		pm2_WR(par, PM2R_FB_SOURCE_DELTA,
+			((ysrc-y) & 0xfff) << 16 | ((xsrc-x) & 0xfff));
+	else
+		pm2_WR(par, PM2R_FB_BLOCK_COLOR, color);
+	pm2_WR(par, PM2R_RECTANGLE_ORIGIN, (y << 16) | x);
+	pm2_WR(par, PM2R_RECTANGLE_SIZE, (h << 16) | w);
+	wmb();
+	pm2_WR(par, PM2R_RENDER,PM2F_RENDER_RECTANGLE |
+				(x<xsrc ? PM2F_INCREASE_X : 0) |
+				(y<ysrc ? PM2F_INCREASE_Y : 0) |
+				(copy ? 0 : PM2F_RENDER_FASTFILL));
+	wait_pm2(par);
+}
+
+static void pm2fb_fillrect (struct fb_info *info,
+				const struct fb_fillrect *region)
+{
+	struct pm2fb_par *par = info->par;
+	struct fb_fillrect modded;
+	int vxres, vyres;
+	u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
+		((u32*)info->pseudo_palette)[region->color] : region->color;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+	if ((info->flags & FBINFO_HWACCEL_DISABLED) ||
+		region->rop != ROP_COPY ) {
+		cfb_fillrect(info, region);
+		return;
+	}
+
+	vxres = info->var.xres_virtual;
+	vyres = info->var.yres_virtual;
+
+	memcpy(&modded, region, sizeof(struct fb_fillrect));
+
+	if(!modded.width || !modded.height ||
+	   modded.dx >= vxres || modded.dy >= vyres)
+		return;
+
+	if(modded.dx + modded.width  > vxres)
+		modded.width  = vxres - modded.dx;
+	if(modded.dy + modded.height > vyres)
+		modded.height = vyres - modded.dy;
+
+	if(info->var.bits_per_pixel == 8)
+		color |= color << 8;
+	if(info->var.bits_per_pixel <= 16)
+		color |= color << 16;
+
+	if(info->var.bits_per_pixel != 24)
+		pm2fb_block_op(par, 0, 0, 0,
+				modded.dx, modded.dy,
+				modded.width, modded.height, color);
+	else
+		cfb_fillrect(info, region);
+}
+
+static void pm2fb_copyarea(struct fb_info *info,
+				const struct fb_copyarea *area)
+{
+	struct pm2fb_par *par = info->par;
+	struct fb_copyarea modded;
+	u32 vxres, vyres;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+	if (info->flags & FBINFO_HWACCEL_DISABLED) {
+		cfb_copyarea(info, area);
+		return;
+	}
+
+	memcpy(&modded, area, sizeof(struct fb_copyarea));
+
+	vxres = info->var.xres_virtual;
+	vyres = info->var.yres_virtual;
+
+	if(!modded.width || !modded.height ||
+	   modded.sx >= vxres || modded.sy >= vyres ||
+	   modded.dx >= vxres || modded.dy >= vyres)
+		return;
+
+	if(modded.sx + modded.width > vxres)
+		modded.width = vxres - modded.sx;
+	if(modded.dx + modded.width > vxres)
+		modded.width = vxres - modded.dx;
+	if(modded.sy + modded.height > vyres)
+		modded.height = vyres - modded.sy;
+	if(modded.dy + modded.height > vyres)
+		modded.height = vyres - modded.dy;
+
+	pm2fb_block_op(par, 1, modded.sx, modded.sy,
+			modded.dx, modded.dy,
+			modded.width, modded.height, 0);
+}
+
 /* ------------ Hardware Independent Functions ------------ */
 
 /*
@@ -1054,8 +1176,8 @@ static struct fb_ops pm2fb_ops = {
 	.fb_setcolreg	= pm2fb_setcolreg,
 	.fb_blank	= pm2fb_blank,
 	.fb_pan_display	= pm2fb_pan_display,
-	.fb_fillrect	= cfb_fillrect,
-	.fb_copyarea	= cfb_copyarea,
+	.fb_fillrect	= pm2fb_fillrect,
+	.fb_copyarea	= pm2fb_copyarea,
 	.fb_imageblit	= cfb_imageblit,
 };
 
@@ -1204,7 +1326,9 @@ static int __devinit pm2fb_probe(struct pci_dev *pdev,
 	info->fix		= pm2fb_fix; 	
 	info->pseudo_palette	= default_par->palette;
 	info->flags		= FBINFO_DEFAULT |
-                                  FBINFO_HWACCEL_YPAN;
+                                  FBINFO_HWACCEL_YPAN |
+	                          FBINFO_HWACCEL_COPYAREA |
+	                          FBINFO_HWACCEL_FILLRECT;
 
 	if (!mode)
 		mode = "640x480@60";