drivers/video/i810/i810_accel.c

   1 /*-*- linux-c -*-
   2  *  linux/drivers/video/i810_accel.c -- Hardware Acceleration
   3  *
   4  *      Copyright (C) 2001 Antonino Daplas<adaplas@pol.net>
   5  *      All Rights Reserved
   6  *
   7  *  This file is subject to the terms and conditions of the GNU General Public
   8  *  License. See the file COPYING in the main directory of this archive for
   9  *  more details.
  10  */
  11 #include <linux/kernel.h>
  12 #include <linux/string.h>
  13 #include <linux/fb.h>
  14
  15 #include "i810_regs.h"
  16 #include "i810.h"
  17
  18 static u32 i810fb_rop[] = {
  19         COLOR_COPY_ROP, /* ROP_COPY */
  20         XOR_ROP         /* ROP_XOR  */
  21 };
  22
  23 /* Macros */
  24 #define PUT_RING(n) {                                        \
  25         i810_writel(par->cur_tail, par->iring.virtual, n);   \
  26         par->cur_tail += 4;                                  \
  27         par->cur_tail &= RING_SIZE_MASK;                     \
  28 }
  29
  30 extern void flush_cache(void);
  31
  32 /************************************************************/
  33
  34 /* BLT Engine Routines */
  35 static inline void i810_report_error(u8 __iomem *mmio)
  36 {
  37         printk("IIR     : 0x%04x\n"
  38                "EIR     : 0x%04x\n"
  39                "PGTBL_ER: 0x%04x\n"
  40                "IPEIR   : 0x%04x\n"
  41                "IPEHR   : 0x%04x\n",
  42                i810_readw(IIR, mmio),
  43                i810_readb(EIR, mmio),
  44                i810_readl(PGTBL_ER, mmio),
  45                i810_readl(IPEIR, mmio),
  46                i810_readl(IPEHR, mmio));
  47 }
  48
  49 /**
  50  * wait_for_space - check ring buffer free space
  51  * @space: amount of ringbuffer space needed in bytes
  52  * @par: pointer to i810fb_par structure
  53  *
  54  * DESCRIPTION:
  55  * The function waits until a free space from the ringbuffer
  56  * is available
  57  */
  58 static inline int wait_for_space(struct fb_info *info, u32 space)
  59 {
  60         struct i810fb_par *par = (struct i810fb_par *) info->par;
  61         u32 head, count = WAIT_COUNT, tail;
  62         u8 __iomem *mmio = par->mmio_start_virtual;
  63
  64         tail = par->cur_tail;
  65         while (count--) {
  66                 head = i810_readl(IRING + 4, mmio) & RBUFFER_HEAD_MASK;
  67                 if ((tail == head) ||
  68                     (tail > head &&
  69                      (par->iring.size - tail + head) >= space) ||
  70                     (tail < head && (head - tail) >= space)) {
  71                         return 0;
  72                 }
  73         }
  74         printk("ringbuffer lockup!!!\n");
  75         i810_report_error(mmio);
  76         par->dev_flags |= LOCKUP;
  77         info->pixmap.scan_align = 1;
  78         return 1;
  79 }
  80
  81 /**
  82  * wait_for_engine_idle - waits for all hardware engines to finish
  83  * @par: pointer to i810fb_par structure
  84  *
  85  * DESCRIPTION:
  86  * This waits for lring(0), iring(1), and batch(3), etc to finish and
  87  * waits until ringbuffer is empty.
  88  */
  89 static inline int wait_for_engine_idle(struct fb_info *info)
  90 {
  91         struct i810fb_par *par = (struct i810fb_par *) info->par;
  92         u8 __iomem *mmio = par->mmio_start_virtual;
  93         int count = WAIT_COUNT;
  94
  95         if (wait_for_space(info, par->iring.size)) /* flush */
  96                 return 1;
  97
  98         while((i810_readw(INSTDONE, mmio) & 0x7B) != 0x7B && --count);
  99         if (count) return 0;
 100
 101         printk("accel engine lockup!!!\n");
 102         printk("INSTDONE: 0x%04x\n", i810_readl(INSTDONE, mmio));
 103         i810_report_error(mmio);
 104         par->dev_flags |= LOCKUP;
 105         info->pixmap.scan_align = 1;
 106         return 1;
 107 }
 108
 109 /* begin_iring - prepares the ringbuffer
 110  * @space: length of sequence in dwords
 111  * @par: pointer to i810fb_par structure
 112  *
 113  * DESCRIPTION:
 114  * Checks/waits for sufficent space in ringbuffer of size
 115  * space.  Returns the tail of the buffer
 116  */
 117 static inline u32 begin_iring(struct fb_info *info, u32 space)
 118 {
 119         struct i810fb_par *par = (struct i810fb_par *) info->par;
 120
 121         if (par->dev_flags & ALWAYS_SYNC)
 122                 wait_for_engine_idle(info);
 123         return wait_for_space(info, space);
 124 }
 125
 126 /**
 127  * end_iring - advances the buffer
 128  * @par: pointer to i810fb_par structure
 129  *
 130  * DESCRIPTION:
 131  * This advances the tail of the ringbuffer, effectively
 132  * beginning the execution of the graphics instruction sequence.
 133  */
 134 static inline void end_iring(struct i810fb_par *par)
 135 {
 136         u8 __iomem *mmio = par->mmio_start_virtual;
 137
 138         i810_writel(IRING, mmio, par->cur_tail);
 139 }
 140
 141 /**
 142  * source_copy_blit - BLIT transfer operation
 143  * @dwidth: width of rectangular graphics data
 144  * @dheight: height of rectangular graphics data
 145  * @dpitch: bytes per line of destination buffer
 146  * @xdir: direction of copy (left to right or right to left)
 147  * @src: address of first pixel to read from
 148  * @dest: address of first pixel to write to
 149  * @from: source address
 150  * @where: destination address
 151  * @rop: raster operation
 152  * @blit_bpp: pixel format which can be different from the
 153  *            framebuffer's pixelformat
 154  * @par: pointer to i810fb_par structure
 155  *
 156  * DESCRIPTION:
 157  * This is a BLIT operation typically used when doing
 158  * a 'Copy and Paste'
 159  */
 160 static inline void source_copy_blit(int dwidth, int dheight, int dpitch,
 161                                     int xdir, int src, int dest, int rop,
 162                                     int blit_bpp, struct fb_info *info)
 163 {
 164         struct i810fb_par *par = (struct i810fb_par *) info->par;
 165
 166         if (begin_iring(info, 24 + IRING_PAD)) return;
 167
 168         PUT_RING(BLIT | SOURCE_COPY_BLIT | 4);
 169         PUT_RING(xdir | rop << 16 | dpitch | DYN_COLOR_EN | blit_bpp);
 170         PUT_RING(dheight << 16 | dwidth);
 171         PUT_RING(dest);
 172         PUT_RING(dpitch);
 173         PUT_RING(src);
 174
 175         end_iring(par);
 176 }
 177
 178 /**
 179  * color_blit - solid color BLIT operation
 180  * @width: width of destination
 181  * @height: height of destination
 182  * @pitch: pixels per line of the buffer
 183  * @dest: address of first pixel to write to
 184  * @where: destination
 185  * @rop: raster operation
 186  * @what: color to transfer
 187  * @blit_bpp: pixel format which can be different from the
 188  *            framebuffer's pixelformat
 189  * @par: pointer to i810fb_par structure
 190  *
 191  * DESCRIPTION:
 192  * A BLIT operation which can be used for  color fill/rectangular fill
 193  */
 194 static inline void color_blit(int width, int height, int pitch,  int dest,
 195                               int rop, int what, int blit_bpp,
 196                               struct fb_info *info)
 197 {
 198         struct i810fb_par *par = (struct i810fb_par *) info->par;
 199
 200         if (begin_iring(info, 24 + IRING_PAD)) return;
 201
 202         PUT_RING(BLIT | COLOR_BLT | 3);
 203         PUT_RING(rop << 16 | pitch | SOLIDPATTERN | DYN_COLOR_EN | blit_bpp);
 204         PUT_RING(height << 16 | width);
 205         PUT_RING(dest);
 206         PUT_RING(what);
 207         PUT_RING(NOP);
 208
 209         end_iring(par);
 210 }
 211
 212 /**
 213  * mono_src_copy_imm_blit - color expand from system memory to framebuffer
 214  * @dwidth: width of destination
 215  * @dheight: height of destination
 216  * @dpitch: pixels per line of the buffer
 217  * @dsize: size of bitmap in double words
 218  * @dest: address of first byte of pixel;
 219  * @rop: raster operation
 220  * @blit_bpp: pixelformat to use which can be different from the
 221  *            framebuffer's pixelformat
 222  * @src: address of image data
 223  * @bg: backgound color
 224  * @fg: forground color
 225  * @par: pointer to i810fb_par structure
 226  *
 227  * DESCRIPTION:
 228  * A color expand operation where the  source data is placed in the
 229  * ringbuffer itself. Useful for drawing text.
 230  *
 231  * REQUIREMENT:
 232  * The end of a scanline must be padded to the next word.
 233  */
 234 static inline void mono_src_copy_imm_blit(int dwidth, int dheight, int dpitch,
 235                                           int dsize, int blit_bpp, int rop,
 236                                           int dest, const u32 *src, int bg,
 237                                           int fg, struct fb_info *info)
 238 {
 239         struct i810fb_par *par = (struct i810fb_par *) info->par;
 240
 241         if (begin_iring(info, 24 + (dsize << 2) + IRING_PAD)) return;
 242
 243         PUT_RING(BLIT | MONO_SOURCE_COPY_IMMEDIATE | (4 + dsize));
 244         PUT_RING(DYN_COLOR_EN | blit_bpp | rop << 16 | dpitch);
 245         PUT_RING(dheight << 16 | dwidth);
 246         PUT_RING(dest);
 247         PUT_RING(bg);
 248         PUT_RING(fg);
 249         while (dsize--)
 250                 PUT_RING(*src++);
 251
 252         end_iring(par);
 253 }
 254
 255 static inline void load_front(int offset, struct fb_info *info)
 256 {
 257         struct i810fb_par *par = (struct i810fb_par *) info->par;
 258
 259         if (begin_iring(info, 8 + IRING_PAD)) return;
 260
 261         PUT_RING(PARSER | FLUSH);
 262         PUT_RING(NOP);
 263
 264         end_iring(par);
 265
 266         if (begin_iring(info, 8 + IRING_PAD)) return;
 267
 268         PUT_RING(PARSER | FRONT_BUFFER | ((par->pitch >> 3) << 8));
 269         PUT_RING((par->fb.offset << 12) + offset);
 270
 271         end_iring(par);
 272 }
 273
 274 /**
 275  * i810fb_iring_enable - enables/disables the ringbuffer
 276  * @mode: enable or disable
 277  * @par: pointer to i810fb_par structure
 278  *
 279  * DESCRIPTION:
 280  * Enables or disables the ringbuffer, effectively enabling or
 281  * disabling the instruction/acceleration engine.
 282  */
 283 static inline void i810fb_iring_enable(struct i810fb_par *par, u32 mode)
 284 {
 285         u32 tmp;
 286         u8 __iomem *mmio = par->mmio_start_virtual;
 287
 288         tmp = i810_readl(IRING + 12, mmio);
 289         if (mode == OFF)
 290                 tmp &= ~1;
 291         else
 292                 tmp |= 1;
 293         flush_cache();
 294         i810_writel(IRING + 12, mmio, tmp);
 295 }
 296
 297 void i810fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 298 {
 299         struct i810fb_par *par = (struct i810fb_par *) info->par;
 300         u32 dx, dy, width, height, dest, rop = 0, color = 0;
 301
 302         if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
 303             par->depth == 4)
 304                 return cfb_fillrect(info, rect);
 305
 306         if (par->depth == 1)
 307                 color = rect->color;
 308         else
 309                 color = ((u32 *) (info->pseudo_palette))[rect->color];
 310
 311         rop = i810fb_rop[rect->rop];
 312
 313         dx = rect->dx * par->depth;
 314         width = rect->width * par->depth;
 315         dy = rect->dy;
 316         height = rect->height;
 317
 318         dest = info->fix.smem_start + (dy * info->fix.line_length) + dx;
 319         color_blit(width, height, info->fix.line_length, dest, rop, color,
 320                    par->blit_bpp, info);
 321 }
 322
 323 void i810fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
 324 {
 325         struct i810fb_par *par = (struct i810fb_par *) info->par;
 326         u32 sx, sy, dx, dy, pitch, width, height, src, dest, xdir;
 327
 328         if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
 329             par->depth == 4)
 330                 return cfb_copyarea(info, region);
 331
 332         dx = region->dx * par->depth;
 333         sx = region->sx * par->depth;
 334         width = region->width * par->depth;
 335         sy = region->sy;
 336         dy = region->dy;
 337         height = region->height;
 338
 339         if (dx <= sx) {
 340                 xdir = INCREMENT;
 341         }
 342         else {
 343                 xdir = DECREMENT;
 344                 sx += width - 1;
 345                 dx += width - 1;
 346         }
 347         if (dy <= sy) {
 348                 pitch = info->fix.line_length;
 349         }
 350         else {
 351                 pitch = (-(info->fix.line_length)) & 0xFFFF;
 352                 sy += height - 1;
 353                 dy += height - 1;
 354         }
 355         src = info->fix.smem_start + (sy * info->fix.line_length) + sx;
 356         dest = info->fix.smem_start + (dy * info->fix.line_length) + dx;
 357
 358         source_copy_blit(width, height, pitch, xdir, src, dest,
 359                          PAT_COPY_ROP, par->blit_bpp, info);
 360 }
 361
 362 void i810fb_imageblit(struct fb_info *info, const struct fb_image *image)
 363 {
 364         struct i810fb_par *par = (struct i810fb_par *) info->par;
 365         u32 fg = 0, bg = 0, size, dst;
 366
 367         if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
 368             par->depth == 4 || image->depth != 1)
 369                 return cfb_imageblit(info, image);
 370
 371         switch (info->var.bits_per_pixel) {
 372         case 8:
 373                 fg = image->fg_color;
 374                 bg = image->bg_color;
 375                 break;
 376         case 16:
 377         case 24:
 378                 fg = ((u32 *)(info->pseudo_palette))[image->fg_color];
 379                 bg = ((u32 *)(info->pseudo_palette))[image->bg_color];
 380                 break;
 381         }
 382
 383         dst = info->fix.smem_start + (image->dy * info->fix.line_length) +
 384                 (image->dx * par->depth);
 385
 386         size = (image->width+7)/8 + 1;
 387         size &= ~1;
 388         size *= image->height;
 389         size += 7;
 390         size &= ~7;
 391         mono_src_copy_imm_blit(image->width * par->depth,
 392                                image->height, info->fix.line_length,
 393                                size/4, par->blit_bpp,
 394                                PAT_COPY_ROP, dst, (u32 *) image->data,
 395                                bg, fg, info);
 396 }
 397
 398 int i810fb_sync(struct fb_info *info)
 399 {
 400         struct i810fb_par *par = (struct i810fb_par *) info->par;
 401
 402         if (!info->var.accel_flags || par->dev_flags & LOCKUP)
 403                 return 0;
 404
 405         return wait_for_engine_idle(info);
 406 }
 407
 408 void i810fb_load_front(u32 offset, struct fb_info *info)
 409 {
 410         struct i810fb_par *par = (struct i810fb_par *) info->par;
 411         u8 __iomem *mmio = par->mmio_start_virtual;
 412
 413         if (!info->var.accel_flags || par->dev_flags & LOCKUP)
 414                 i810_writel(DPLYBASE, mmio, par->fb.physical + offset);
 415         else
 416                 load_front(offset, info);
 417 }
 418
 419 /**
 420  * i810fb_init_ringbuffer - initialize the ringbuffer
 421  * @par: pointer to i810fb_par structure
 422  *
 423  * DESCRIPTION:
 424  * Initializes the ringbuffer by telling the device the
 425  * size and location of the ringbuffer.  It also sets
 426  * the head and tail pointers = 0
 427  */
 428 void i810fb_init_ringbuffer(struct fb_info *info)
 429 {
 430         struct i810fb_par *par = (struct i810fb_par *) info->par;
 431         u32 tmp1, tmp2;
 432         u8 __iomem *mmio = par->mmio_start_virtual;
 433
 434         wait_for_engine_idle(info);
 435         i810fb_iring_enable(par, OFF);
 436         i810_writel(IRING, mmio, 0);
 437         i810_writel(IRING + 4, mmio, 0);
 438         par->cur_tail = 0;
 439
 440         tmp2 = i810_readl(IRING + 8, mmio) & ~RBUFFER_START_MASK;
 441         tmp1 = par->iring.physical;
 442         i810_writel(IRING + 8, mmio, tmp2 | tmp1);
 443
 444         tmp1 = i810_readl(IRING + 12, mmio);
 445         tmp1 &= ~RBUFFER_SIZE_MASK;
 446         tmp2 = (par->iring.size - I810_PAGESIZE) & RBUFFER_SIZE_MASK;
 447         i810_writel(IRING + 12, mmio, tmp1 | tmp2);
 448         i810fb_iring_enable(par, ON);
 449 }