drivers/staging/gma500/psb_2d.c

   1 /**************************************************************************
   2  * Copyright (c) 2007, Intel Corporation.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
  19  * develop this driver.
  20  *
  21  **************************************************************************/
  22
  23 #include <linux/module.h>
  24 #include <linux/kernel.h>
  25 #include <linux/errno.h>
  26 #include <linux/string.h>
  27 #include <linux/mm.h>
  28 #include <linux/tty.h>
  29 #include <linux/slab.h>
  30 #include <linux/delay.h>
  31 #include <linux/fb.h>
  32 #include <linux/init.h>
  33 #include <linux/console.h>
  34
  35 #include <drm/drmP.h>
  36 #include <drm/drm.h>
  37 #include <drm/drm_crtc.h>
  38
  39 #include "psb_drv.h"
  40 #include "psb_reg.h"
  41 #include "psb_fb.h"
  42
  43 void psb_spank(struct drm_psb_private *dev_priv)
  44 {
  45         PSB_WSGX32(_PSB_CS_RESET_BIF_RESET | _PSB_CS_RESET_DPM_RESET |
  46                 _PSB_CS_RESET_TA_RESET | _PSB_CS_RESET_USE_RESET |
  47                 _PSB_CS_RESET_ISP_RESET | _PSB_CS_RESET_TSP_RESET |
  48                 _PSB_CS_RESET_TWOD_RESET, PSB_CR_SOFT_RESET);
  49         (void) PSB_RSGX32(PSB_CR_SOFT_RESET);
  50
  51         msleep(1);
  52
  53         PSB_WSGX32(0, PSB_CR_SOFT_RESET);
  54         wmb();
  55         PSB_WSGX32(PSB_RSGX32(PSB_CR_BIF_CTRL) | _PSB_CB_CTRL_CLEAR_FAULT,
  56                    PSB_CR_BIF_CTRL);
  57         wmb();
  58         (void) PSB_RSGX32(PSB_CR_BIF_CTRL);
  59
  60         msleep(1);
  61         PSB_WSGX32(PSB_RSGX32(PSB_CR_BIF_CTRL) & ~_PSB_CB_CTRL_CLEAR_FAULT,
  62                    PSB_CR_BIF_CTRL);
  63         (void) PSB_RSGX32(PSB_CR_BIF_CTRL);
  64         PSB_WSGX32(dev_priv->pg->gatt_start, PSB_CR_BIF_TWOD_REQ_BASE);
  65 }
  66
  67 static int psb_2d_wait_available(struct drm_psb_private *dev_priv,
  68                           unsigned size)
  69 {
  70         uint32_t avail = PSB_RSGX32(PSB_CR_2D_SOCIF);
  71         unsigned long t = jiffies + HZ;
  72
  73         while(avail < size) {
  74                 avail = PSB_RSGX32(PSB_CR_2D_SOCIF);
  75                 if (time_after(jiffies, t)) {
  76                         psb_spank(dev_priv);
  77                         return -EIO;
  78                 }
  79         }
  80         return 0;
  81 }
  82
  83 /* FIXME: Remember if we expose the 2D engine to the DRM we need to serialize
  84    it with console use */
  85
  86 int psbfb_2d_submit(struct drm_psb_private *dev_priv, uint32_t *cmdbuf,
  87                            unsigned size)
  88 {
  89         int ret = 0;
  90         int i;
  91         unsigned submit_size;
  92
  93         while (size > 0) {
  94                 submit_size = (size < 0x60) ? size : 0x60;
  95                 size -= submit_size;
  96                 ret = psb_2d_wait_available(dev_priv, submit_size);
  97                 if (ret)
  98                         return ret;
  99
 100                 submit_size <<= 2;
 101                 for (i = 0; i < submit_size; i += 4) {
 102                         PSB_WSGX32(*cmdbuf++, PSB_SGX_2D_SLAVE_PORT + i);
 103                 }
 104                 (void)PSB_RSGX32(PSB_SGX_2D_SLAVE_PORT + i - 4);
 105         }
 106         return 0;
 107 }
 108
 109 static int psb_accel_2d_fillrect(struct drm_psb_private *dev_priv,
 110                                  uint32_t dst_offset, uint32_t dst_stride,
 111                                  uint32_t dst_format, uint16_t dst_x,
 112                                  uint16_t dst_y, uint16_t size_x,
 113                                  uint16_t size_y, uint32_t fill)
 114 {
 115         uint32_t buffer[10];
 116         uint32_t *buf;
 117
 118         buf = buffer;
 119
 120         *buf++ = PSB_2D_FENCE_BH;
 121
 122         *buf++ =
 123             PSB_2D_DST_SURF_BH | dst_format | (dst_stride <<
 124                                                PSB_2D_DST_STRIDE_SHIFT);
 125         *buf++ = dst_offset;
 126
 127         *buf++ =
 128             PSB_2D_BLIT_BH |
 129             PSB_2D_ROT_NONE |
 130             PSB_2D_COPYORDER_TL2BR |
 131             PSB_2D_DSTCK_DISABLE |
 132             PSB_2D_SRCCK_DISABLE | PSB_2D_USE_FILL | PSB_2D_ROP3_PATCOPY;
 133
 134         *buf++ = fill << PSB_2D_FILLCOLOUR_SHIFT;
 135         *buf++ =
 136             (dst_x << PSB_2D_DST_XSTART_SHIFT) | (dst_y <<
 137                                                   PSB_2D_DST_YSTART_SHIFT);
 138         *buf++ =
 139             (size_x << PSB_2D_DST_XSIZE_SHIFT) | (size_y <<
 140                                                   PSB_2D_DST_YSIZE_SHIFT);
 141         *buf++ = PSB_2D_FLUSH_BH;
 142
 143         return psbfb_2d_submit(dev_priv, buffer, buf - buffer);
 144 }
 145
 146 static void psbfb_fillrect_accel(struct fb_info *info,
 147                                  const struct fb_fillrect *r)
 148 {
 149         struct psb_fbdev *fbdev = info->par;
 150         struct psb_framebuffer *psbfb = fbdev->pfb;
 151         struct drm_device *dev = psbfb->base.dev;
 152         struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;
 153         struct drm_psb_private *dev_priv = dev->dev_private;
 154
 155         uint32_t offset;
 156         uint32_t stride;
 157         uint32_t format;
 158
 159         if (!fb)
 160                 return;
 161
 162         offset = psbfb->gtt->offset;
 163         stride = fb->pitch;
 164
 165         switch (fb->depth) {
 166         case 8:
 167                 format = PSB_2D_DST_332RGB;
 168                 break;
 169         case 15:
 170                 format = PSB_2D_DST_555RGB;
 171                 break;
 172         case 16:
 173                 format = PSB_2D_DST_565RGB;
 174                 break;
 175         case 24:
 176         case 32:
 177                 /* this is wrong but since we don't do blending its okay */
 178                 format = PSB_2D_DST_8888ARGB;
 179                 break;
 180         default:
 181                 /* software fallback */
 182                 cfb_fillrect(info, r);
 183                 return;
 184         }
 185
 186         psb_accel_2d_fillrect(dev_priv,
 187                               offset, stride, format,
 188                               r->dx, r->dy, r->width, r->height, r->color);
 189 }
 190
 191 void psbfb_fillrect(struct fb_info *info,
 192                            const struct fb_fillrect *rect)
 193 {
 194         if (unlikely(info->state != FBINFO_STATE_RUNNING))
 195                 return;
 196
 197         if (1 || (info->flags & FBINFO_HWACCEL_DISABLED))
 198                 return cfb_fillrect(info, rect);
 199
 200         /*psb_check_power_state(dev, PSB_DEVICE_SGX); */
 201         psbfb_fillrect_accel(info, rect);
 202         /* Drop power again here on MRST FIXMEAC */
 203 }
 204
 205 static u32 psb_accel_2d_copy_direction(int xdir, int ydir)
 206 {
 207         if (xdir < 0)
 208                 return (ydir < 0) ? PSB_2D_COPYORDER_BR2TL :
 209                                         PSB_2D_COPYORDER_TR2BL;
 210         else
 211                 return (ydir < 0) ? PSB_2D_COPYORDER_BL2TR :
 212                                         PSB_2D_COPYORDER_TL2BR;
 213 }
 214
 215 /*
 216  * @src_offset in bytes
 217  * @src_stride in bytes
 218  * @src_format psb 2D format defines
 219  * @dst_offset in bytes
 220  * @dst_stride in bytes
 221  * @dst_format psb 2D format defines
 222  * @src_x offset in pixels
 223  * @src_y offset in pixels
 224  * @dst_x offset in pixels
 225  * @dst_y offset in pixels
 226  * @size_x of the copied area
 227  * @size_y of the copied area
 228  */
 229 static int psb_accel_2d_copy(struct drm_psb_private *dev_priv,
 230                              uint32_t src_offset, uint32_t src_stride,
 231                              uint32_t src_format, uint32_t dst_offset,
 232                              uint32_t dst_stride, uint32_t dst_format,
 233                              uint16_t src_x, uint16_t src_y,
 234                              uint16_t dst_x, uint16_t dst_y,
 235                              uint16_t size_x, uint16_t size_y)
 236 {
 237         uint32_t blit_cmd;
 238         uint32_t buffer[10];
 239         uint32_t *buf;
 240         uint32_t direction;
 241
 242         buf = buffer;
 243
 244         direction =
 245             psb_accel_2d_copy_direction(src_x - dst_x, src_y - dst_y);
 246
 247         if (direction == PSB_2D_COPYORDER_BR2TL ||
 248             direction == PSB_2D_COPYORDER_TR2BL) {
 249                 src_x += size_x - 1;
 250                 dst_x += size_x - 1;
 251         }
 252         if (direction == PSB_2D_COPYORDER_BR2TL ||
 253             direction == PSB_2D_COPYORDER_BL2TR) {
 254                 src_y += size_y - 1;
 255                 dst_y += size_y - 1;
 256         }
 257
 258         blit_cmd =
 259             PSB_2D_BLIT_BH |
 260             PSB_2D_ROT_NONE |
 261             PSB_2D_DSTCK_DISABLE |
 262             PSB_2D_SRCCK_DISABLE |
 263             PSB_2D_USE_PAT | PSB_2D_ROP3_SRCCOPY | direction;
 264
 265         *buf++ = PSB_2D_FENCE_BH;
 266         *buf++ =
 267             PSB_2D_DST_SURF_BH | dst_format | (dst_stride <<
 268                                                PSB_2D_DST_STRIDE_SHIFT);
 269         *buf++ = dst_offset;
 270         *buf++ =
 271             PSB_2D_SRC_SURF_BH | src_format | (src_stride <<
 272                                                PSB_2D_SRC_STRIDE_SHIFT);
 273         *buf++ = src_offset;
 274         *buf++ =
 275             PSB_2D_SRC_OFF_BH | (src_x << PSB_2D_SRCOFF_XSTART_SHIFT) |
 276             (src_y << PSB_2D_SRCOFF_YSTART_SHIFT);
 277         *buf++ = blit_cmd;
 278         *buf++ =
 279             (dst_x << PSB_2D_DST_XSTART_SHIFT) | (dst_y <<
 280                                                   PSB_2D_DST_YSTART_SHIFT);
 281         *buf++ =
 282             (size_x << PSB_2D_DST_XSIZE_SHIFT) | (size_y <<
 283                                                   PSB_2D_DST_YSIZE_SHIFT);
 284         *buf++ = PSB_2D_FLUSH_BH;
 285
 286         return psbfb_2d_submit(dev_priv, buffer, buf - buffer);
 287 }
 288
 289 static void psbfb_copyarea_accel(struct fb_info *info,
 290                                  const struct fb_copyarea *a)
 291 {
 292         struct psb_fbdev *fbdev = info->par;
 293         struct psb_framebuffer *psbfb = fbdev->pfb;
 294         struct drm_device *dev = psbfb->base.dev;
 295         struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;
 296         struct drm_psb_private *dev_priv = dev->dev_private;
 297         uint32_t offset;
 298         uint32_t stride;
 299         uint32_t src_format;
 300         uint32_t dst_format;
 301
 302         if (!fb)
 303                 return;
 304
 305         offset = psbfb->gtt->offset;
 306         stride = fb->pitch;
 307
 308         switch (fb->depth) {
 309         case 8:
 310                 src_format = PSB_2D_SRC_332RGB;
 311                 dst_format = PSB_2D_DST_332RGB;
 312                 break;
 313         case 15:
 314                 src_format = PSB_2D_SRC_555RGB;
 315                 dst_format = PSB_2D_DST_555RGB;
 316                 break;
 317         case 16:
 318                 src_format = PSB_2D_SRC_565RGB;
 319                 dst_format = PSB_2D_DST_565RGB;
 320                 break;
 321         case 24:
 322         case 32:
 323                 /* this is wrong but since we don't do blending its okay */
 324                 src_format = PSB_2D_SRC_8888ARGB;
 325                 dst_format = PSB_2D_DST_8888ARGB;
 326                 break;
 327         default:
 328                 /* software fallback */
 329                 cfb_copyarea(info, a);
 330                 return;
 331         }
 332
 333         psb_accel_2d_copy(dev_priv,
 334                           offset, stride, src_format,
 335                           offset, stride, dst_format,
 336                           a->sx, a->sy, a->dx, a->dy, a->width, a->height);
 337 }
 338
 339 void psbfb_copyarea(struct fb_info *info,
 340                            const struct fb_copyarea *region)
 341 {
 342         if (unlikely(info->state != FBINFO_STATE_RUNNING))
 343                 return;
 344
 345         if (info->flags & FBINFO_HWACCEL_DISABLED)
 346                 return cfb_copyarea(info, region);
 347
 348         /* psb_check_power_state(dev, PSB_DEVICE_SGX); */
 349         psbfb_copyarea_accel(info, region);
 350         /* Need to power back off here for MRST FIXMEAC */
 351 }
 352
 353 void psbfb_imageblit(struct fb_info *info, const struct fb_image *image)
 354 {
 355         /* For now */
 356         cfb_imageblit(info, image);
 357 }
 358
 359 int psbfb_sync(struct fb_info *info)
 360 {
 361         struct psb_fbdev *fbdev = info->par;
 362         struct psb_framebuffer *psbfb = fbdev->pfb;
 363         struct drm_device *dev = psbfb->base.dev;
 364         struct drm_psb_private *dev_priv = dev->dev_private;
 365         unsigned long _end = jiffies + DRM_HZ;
 366         int busy = 0;
 367
 368 #if 0
 369         /* Just a way to quickly test if cmd issue explodes */
 370         u32 test[2] = {
 371                 PSB_2D_FENCE_BH,
 372         };
 373         psbfb_2d_submit(dev_priv, test, 1);
 374 #endif
 375         /*
 376          * First idle the 2D engine.
 377          */
 378
 379         if ((PSB_RSGX32(PSB_CR_2D_SOCIF) == _PSB_C2_SOCIF_EMPTY) &&
 380             ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) & _PSB_C2B_STATUS_BUSY) == 0))
 381                 goto out;
 382
 383         do {
 384                 busy = (PSB_RSGX32(PSB_CR_2D_SOCIF) != _PSB_C2_SOCIF_EMPTY);
 385                 cpu_relax();
 386         } while (busy && !time_after_eq(jiffies, _end));
 387
 388         if (busy)
 389                 busy = (PSB_RSGX32(PSB_CR_2D_SOCIF) != _PSB_C2_SOCIF_EMPTY);
 390         if (busy)
 391                 goto out;
 392
 393         do {
 394                 busy = ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) &
 395                                                 _PSB_C2B_STATUS_BUSY) != 0);
 396                 cpu_relax();
 397         } while (busy && !time_after_eq(jiffies, _end));
 398         if (busy)
 399                 busy = ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) &
 400                                         _PSB_C2B_STATUS_BUSY) != 0);
 401
 402 out:
 403         return (busy) ? -EBUSY : 0;
 404 }
 405
 406 /*
 407         info->fix.accel = FB_ACCEL_I830;
 408         info->flags = FBINFO_DEFAULT;
 409 */