git.sur5r.net Git - u-boot/blob - lib/efi_loader/efi_gop.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  EFI application disk support
   4  *
   5  *  Copyright (c) 2016 Alexander Graf
   6  */
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <efi_loader.h>
  11 #include <inttypes.h>
  12 #include <lcd.h>
  13 #include <malloc.h>
  14 #include <video.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 static const efi_guid_t efi_gop_guid = EFI_GOP_GUID;
  19
  20 struct efi_gop_obj {
  21         /* Generic EFI object parent class data */
  22         struct efi_object parent;
  23         /* EFI Interface callback struct for gop */
  24         struct efi_gop ops;
  25         /* The only mode we support */
  26         struct efi_gop_mode_info info;
  27         struct efi_gop_mode mode;
  28         /* Fields we only have acces to during init */
  29         u32 bpix;
  30         void *fb;
  31 };
  32
  33 static efi_status_t EFIAPI gop_query_mode(struct efi_gop *this, u32 mode_number,
  34                                           efi_uintn_t *size_of_info,
  35                                           struct efi_gop_mode_info **info)
  36 {
  37         struct efi_gop_obj *gopobj;
  38
  39         EFI_ENTRY("%p, %x, %p, %p", this, mode_number, size_of_info, info);
  40
  41         gopobj = container_of(this, struct efi_gop_obj, ops);
  42         *size_of_info = sizeof(gopobj->info);
  43         *info = &gopobj->info;
  44
  45         return EFI_EXIT(EFI_SUCCESS);
  46 }
  47
  48 static efi_status_t EFIAPI gop_set_mode(struct efi_gop *this, u32 mode_number)
  49 {
  50         EFI_ENTRY("%p, %x", this, mode_number);
  51
  52         if (mode_number != 0)
  53                 return EFI_EXIT(EFI_INVALID_PARAMETER);
  54
  55         return EFI_EXIT(EFI_SUCCESS);
  56 }
  57
  58 static __always_inline struct efi_gop_pixel efi_vid16_to_blt_col(u16 vid)
  59 {
  60         struct efi_gop_pixel blt = {
  61                 .reserved = 0,
  62         };
  63
  64         blt.blue  = (vid & 0x1f) << 3;
  65         vid >>= 5;
  66         blt.green = (vid & 0x3f) << 2;
  67         vid >>= 6;
  68         blt.red   = (vid & 0x1f) << 3;
  69         return blt;
  70 }
  71
  72 static __always_inline u16 efi_blt_col_to_vid16(struct efi_gop_pixel *blt)
  73 {
  74         return (u16)(blt->red   >> 3) << 11 |
  75                (u16)(blt->green >> 2) <<  5 |
  76                (u16)(blt->blue  >> 3);
  77 }
  78
  79 static __always_inline efi_status_t gop_blt_int(struct efi_gop *this,
  80                                                 struct efi_gop_pixel *bufferp,
  81                                                 u32 operation, efi_uintn_t sx,
  82                                                 efi_uintn_t sy, efi_uintn_t dx,
  83                                                 efi_uintn_t dy,
  84                                                 efi_uintn_t width,
  85                                                 efi_uintn_t height,
  86                                                 efi_uintn_t delta,
  87                                                 efi_uintn_t vid_bpp)
  88 {
  89         struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
  90         efi_uintn_t i, j, linelen, slineoff = 0, dlineoff, swidth, dwidth;
  91         u32 *fb32 = gopobj->fb;
  92         u16 *fb16 = gopobj->fb;
  93         struct efi_gop_pixel *buffer = __builtin_assume_aligned(bufferp, 4);
  94
  95         if (delta) {
  96                 /* Check for 4 byte alignment */
  97                 if (delta & 3)
  98                         return EFI_INVALID_PARAMETER;
  99                 linelen = delta >> 2;
 100         } else {
 101                 linelen = width;
 102         }
 103
 104         /* Check source rectangle */
 105         switch (operation) {
 106         case EFI_BLT_VIDEO_FILL:
 107                 break;
 108         case EFI_BLT_BUFFER_TO_VIDEO:
 109                 if (sx + width > linelen)
 110                         return EFI_INVALID_PARAMETER;
 111                 break;
 112         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 113         case EFI_BLT_VIDEO_TO_VIDEO:
 114                 if (sx + width > gopobj->info.width ||
 115                     sy + height > gopobj->info.height)
 116                         return EFI_INVALID_PARAMETER;
 117                 break;
 118         default:
 119                 return EFI_INVALID_PARAMETER;
 120         }
 121
 122         /* Check destination rectangle */
 123         switch (operation) {
 124         case EFI_BLT_VIDEO_FILL:
 125         case EFI_BLT_BUFFER_TO_VIDEO:
 126         case EFI_BLT_VIDEO_TO_VIDEO:
 127                 if (dx + width > gopobj->info.width ||
 128                     dy + height > gopobj->info.height)
 129                         return EFI_INVALID_PARAMETER;
 130                 break;
 131         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 132                 if (dx + width > linelen)
 133                         return EFI_INVALID_PARAMETER;
 134                 break;
 135         }
 136
 137         /* Calculate line width */
 138         switch (operation) {
 139         case EFI_BLT_BUFFER_TO_VIDEO:
 140                 swidth = linelen;
 141                 break;
 142         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 143         case EFI_BLT_VIDEO_TO_VIDEO:
 144                 swidth = gopobj->info.width;
 145                 if (!vid_bpp)
 146                         return EFI_UNSUPPORTED;
 147                 break;
 148         case EFI_BLT_VIDEO_FILL:
 149                 swidth = 0;
 150                 break;
 151         }
 152
 153         switch (operation) {
 154         case EFI_BLT_BUFFER_TO_VIDEO:
 155         case EFI_BLT_VIDEO_FILL:
 156         case EFI_BLT_VIDEO_TO_VIDEO:
 157                 dwidth = gopobj->info.width;
 158                 if (!vid_bpp)
 159                         return EFI_UNSUPPORTED;
 160                 break;
 161         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 162                 dwidth = linelen;
 163                 break;
 164         }
 165
 166         slineoff = swidth * sy;
 167         dlineoff = dwidth * dy;
 168         for (i = 0; i < height; i++) {
 169                 for (j = 0; j < width; j++) {
 170                         struct efi_gop_pixel pix;
 171
 172                         /* Read source pixel */
 173                         switch (operation) {
 174                         case EFI_BLT_VIDEO_FILL:
 175                                 pix = *buffer;
 176                                 break;
 177                         case EFI_BLT_BUFFER_TO_VIDEO:
 178                                 pix = buffer[slineoff + j + sx];
 179                                 break;
 180                         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 181                         case EFI_BLT_VIDEO_TO_VIDEO:
 182                                 if (vid_bpp == 32)
 183                                         pix = *(struct efi_gop_pixel *)&fb32[
 184                                                 slineoff + j + sx];
 185                                 else
 186                                         pix = efi_vid16_to_blt_col(fb16[
 187                                                 slineoff + j + sx]);
 188                                 break;
 189                         }
 190
 191                         /* Write destination pixel */
 192                         switch (operation) {
 193                         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 194                                 buffer[dlineoff + j + dx] = pix;
 195                                 break;
 196                         case EFI_BLT_BUFFER_TO_VIDEO:
 197                         case EFI_BLT_VIDEO_FILL:
 198                         case EFI_BLT_VIDEO_TO_VIDEO:
 199                                 if (vid_bpp == 32)
 200                                         fb32[dlineoff + j + dx] = *(u32 *)&pix;
 201                                 else
 202                                         fb16[dlineoff + j + dx] =
 203                                                 efi_blt_col_to_vid16(&pix);
 204                                 break;
 205                         }
 206                 }
 207                 slineoff += swidth;
 208                 dlineoff += dwidth;
 209         }
 210
 211         return EFI_SUCCESS;
 212 }
 213
 214 static efi_uintn_t gop_get_bpp(struct efi_gop *this)
 215 {
 216         struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
 217         efi_uintn_t vid_bpp = 0;
 218
 219         switch (gopobj->bpix) {
 220 #ifdef CONFIG_DM_VIDEO
 221         case VIDEO_BPP32:
 222 #else
 223         case LCD_COLOR32:
 224 #endif
 225                 vid_bpp = 32;
 226                 break;
 227 #ifdef CONFIG_DM_VIDEO
 228         case VIDEO_BPP16:
 229 #else
 230         case LCD_COLOR16:
 231 #endif
 232                 vid_bpp = 16;
 233                 break;
 234         }
 235
 236         return vid_bpp;
 237 }
 238
 239 /*
 240  * Gcc can't optimize our BLT function well, but we need to make sure that
 241  * our 2-dimensional loop gets executed very quickly, otherwise the system
 242  * will feel slow.
 243  *
 244  * By manually putting all obvious branch targets into functions which call
 245  * our generic blt function with constants, the compiler can successfully
 246  * optimize for speed.
 247  */
 248 static efi_status_t gop_blt_video_fill(struct efi_gop *this,
 249                                        struct efi_gop_pixel *buffer,
 250                                        u32 foo, efi_uintn_t sx,
 251                                        efi_uintn_t sy, efi_uintn_t dx,
 252                                        efi_uintn_t dy, efi_uintn_t width,
 253                                        efi_uintn_t height, efi_uintn_t delta,
 254                                        efi_uintn_t vid_bpp)
 255 {
 256         return gop_blt_int(this, buffer, EFI_BLT_VIDEO_FILL, sx, sy, dx,
 257                            dy, width, height, delta, vid_bpp);
 258 }
 259
 260 static efi_status_t gop_blt_buf_to_vid16(struct efi_gop *this,
 261                                          struct efi_gop_pixel *buffer,
 262                                          u32 foo, efi_uintn_t sx,
 263                                          efi_uintn_t sy, efi_uintn_t dx,
 264                                          efi_uintn_t dy, efi_uintn_t width,
 265                                          efi_uintn_t height, efi_uintn_t delta)
 266 {
 267         return gop_blt_int(this, buffer, EFI_BLT_BUFFER_TO_VIDEO, sx, sy, dx,
 268                            dy, width, height, delta, 16);
 269 }
 270
 271 static efi_status_t gop_blt_buf_to_vid32(struct efi_gop *this,
 272                                          struct efi_gop_pixel *buffer,
 273                                          u32 foo, efi_uintn_t sx,
 274                                          efi_uintn_t sy, efi_uintn_t dx,
 275                                          efi_uintn_t dy, efi_uintn_t width,
 276                                          efi_uintn_t height, efi_uintn_t delta)
 277 {
 278         return gop_blt_int(this, buffer, EFI_BLT_BUFFER_TO_VIDEO, sx, sy, dx,
 279                            dy, width, height, delta, 32);
 280 }
 281
 282 static efi_status_t gop_blt_vid_to_vid(struct efi_gop *this,
 283                                        struct efi_gop_pixel *buffer,
 284                                        u32 foo, efi_uintn_t sx,
 285                                        efi_uintn_t sy, efi_uintn_t dx,
 286                                        efi_uintn_t dy, efi_uintn_t width,
 287                                        efi_uintn_t height, efi_uintn_t delta,
 288                                        efi_uintn_t vid_bpp)
 289 {
 290         return gop_blt_int(this, buffer, EFI_BLT_VIDEO_TO_VIDEO, sx, sy, dx,
 291                            dy, width, height, delta, vid_bpp);
 292 }
 293
 294 static efi_status_t gop_blt_vid_to_buf(struct efi_gop *this,
 295                                        struct efi_gop_pixel *buffer,
 296                                        u32 foo, efi_uintn_t sx,
 297                                        efi_uintn_t sy, efi_uintn_t dx,
 298                                        efi_uintn_t dy, efi_uintn_t width,
 299                                        efi_uintn_t height, efi_uintn_t delta,
 300                                        efi_uintn_t vid_bpp)
 301 {
 302         return gop_blt_int(this, buffer, EFI_BLT_VIDEO_TO_BLT_BUFFER, sx, sy,
 303                            dx, dy, width, height, delta, vid_bpp);
 304 }
 305
 306 /*
 307  * Copy rectangle.
 308  *
 309  * This function implements the Blt service of the EFI_GRAPHICS_OUTPUT_PROTOCOL.
 310  * See the Unified Extensible Firmware Interface (UEFI) specification for
 311  * details.
 312  *
 313  * @this:       EFI_GRAPHICS_OUTPUT_PROTOCOL
 314  * @buffer:     pixel buffer
 315  * @sx:         source x-coordinate
 316  * @sy:         source y-coordinate
 317  * @dx:         destination x-coordinate
 318  * @dy:         destination y-coordinate
 319  * @width:      width of rectangle
 320  * @height:     height of rectangle
 321  * @delta:      length in bytes of a line in the pixel buffer (optional)
 322  * @return:     status code
 323  */
 324 efi_status_t EFIAPI gop_blt(struct efi_gop *this, struct efi_gop_pixel *buffer,
 325                             u32 operation, efi_uintn_t sx,
 326                             efi_uintn_t sy, efi_uintn_t dx,
 327                             efi_uintn_t dy, efi_uintn_t width,
 328                             efi_uintn_t height, efi_uintn_t delta)
 329 {
 330         efi_status_t ret = EFI_INVALID_PARAMETER;
 331         efi_uintn_t vid_bpp;
 332
 333         EFI_ENTRY("%p, %p, %u, %zu, %zu, %zu, %zu, %zu, %zu, %zu", this,
 334                   buffer, operation, sx, sy, dx, dy, width, height, delta);
 335
 336         vid_bpp = gop_get_bpp(this);
 337
 338         /* Allow for compiler optimization */
 339         switch (operation) {
 340         case EFI_BLT_VIDEO_FILL:
 341                 ret = gop_blt_video_fill(this, buffer, operation, sx, sy, dx,
 342                                          dy, width, height, delta, vid_bpp);
 343                 break;
 344         case EFI_BLT_BUFFER_TO_VIDEO:
 345                 /* This needs to be super-fast, so duplicate for 16/32bpp */
 346                 if (vid_bpp == 32)
 347                         ret = gop_blt_buf_to_vid32(this, buffer, operation, sx,
 348                                                    sy, dx, dy, width, height,
 349                                                    delta);
 350                 else
 351                         ret = gop_blt_buf_to_vid16(this, buffer, operation, sx,
 352                                                    sy, dx, dy, width, height,
 353                                                    delta);
 354                 break;
 355         case EFI_BLT_VIDEO_TO_VIDEO:
 356                 ret = gop_blt_vid_to_vid(this, buffer, operation, sx, sy, dx,
 357                                          dy, width, height, delta, vid_bpp);
 358                 break;
 359         case EFI_BLT_VIDEO_TO_BLT_BUFFER:
 360                 ret = gop_blt_vid_to_buf(this, buffer, operation, sx, sy, dx,
 361                                          dy, width, height, delta, vid_bpp);
 362                 break;
 363         default:
 364                 ret = EFI_UNSUPPORTED;
 365         }
 366
 367         if (ret != EFI_SUCCESS)
 368                 return EFI_EXIT(ret);
 369
 370 #ifdef CONFIG_DM_VIDEO
 371         video_sync_all();
 372 #else
 373         lcd_sync();
 374 #endif
 375
 376         return EFI_EXIT(EFI_SUCCESS);
 377 }
 378
 379 /*
 380  * Install graphical output protocol.
 381  *
 382  * If no supported video device exists this is not considered as an
 383  * error.
 384  */
 385 efi_status_t efi_gop_register(void)
 386 {
 387         struct efi_gop_obj *gopobj;
 388         u32 bpix, col, row;
 389         u64 fb_base, fb_size;
 390         void *fb;
 391         efi_status_t ret;
 392
 393 #ifdef CONFIG_DM_VIDEO
 394         struct udevice *vdev;
 395         struct video_priv *priv;
 396
 397         /* We only support a single video output device for now */
 398         if (uclass_first_device(UCLASS_VIDEO, &vdev) || !vdev) {
 399                 debug("WARNING: No video device\n");
 400                 return EFI_SUCCESS;
 401         }
 402
 403         priv = dev_get_uclass_priv(vdev);
 404         bpix = priv->bpix;
 405         col = video_get_xsize(vdev);
 406         row = video_get_ysize(vdev);
 407         fb_base = (uintptr_t)priv->fb;
 408         fb_size = priv->fb_size;
 409         fb = priv->fb;
 410 #else
 411         int line_len;
 412
 413         bpix = panel_info.vl_bpix;
 414         col = panel_info.vl_col;
 415         row = panel_info.vl_row;
 416         fb_base = gd->fb_base;
 417         fb_size = lcd_get_size(&line_len);
 418         fb = (void*)gd->fb_base;
 419 #endif
 420
 421         switch (bpix) {
 422 #ifdef CONFIG_DM_VIDEO
 423         case VIDEO_BPP16:
 424         case VIDEO_BPP32:
 425 #else
 426         case LCD_COLOR32:
 427         case LCD_COLOR16:
 428 #endif
 429                 break;
 430         default:
 431                 /* So far, we only work in 16 or 32 bit mode */
 432                 debug("WARNING: Unsupported video mode\n");
 433                 return EFI_SUCCESS;
 434         }
 435
 436         gopobj = calloc(1, sizeof(*gopobj));
 437         if (!gopobj) {
 438                 printf("ERROR: Out of memory\n");
 439                 return EFI_OUT_OF_RESOURCES;
 440         }
 441
 442         /* Hook up to the device list */
 443         efi_add_handle(&gopobj->parent);
 444
 445         /* Fill in object data */
 446         ret = efi_add_protocol(gopobj->parent.handle, &efi_gop_guid,
 447                                &gopobj->ops);
 448         if (ret != EFI_SUCCESS) {
 449                 printf("ERROR: Failure adding gop protocol\n");
 450                 return ret;
 451         }
 452         gopobj->ops.query_mode = gop_query_mode;
 453         gopobj->ops.set_mode = gop_set_mode;
 454         gopobj->ops.blt = gop_blt;
 455         gopobj->ops.mode = &gopobj->mode;
 456
 457         gopobj->mode.max_mode = 1;
 458         gopobj->mode.info = &gopobj->info;
 459         gopobj->mode.info_size = sizeof(gopobj->info);
 460
 461 #ifdef CONFIG_DM_VIDEO
 462         if (bpix == VIDEO_BPP32)
 463 #else
 464         if (bpix == LCD_COLOR32)
 465 #endif
 466         {
 467                 /* With 32bit color space we can directly expose the fb */
 468                 gopobj->mode.fb_base = fb_base;
 469                 gopobj->mode.fb_size = fb_size;
 470         }
 471
 472         gopobj->info.version = 0;
 473         gopobj->info.width = col;
 474         gopobj->info.height = row;
 475         gopobj->info.pixel_format = EFI_GOT_RGBA8;
 476         gopobj->info.pixels_per_scanline = col;
 477
 478         gopobj->bpix = bpix;
 479         gopobj->fb = fb;
 480
 481         return EFI_SUCCESS;
 482 }