drivers/staging/gma500/psb_2d.c

   1 /**************************************************************************
   2  * Copyright (c) 2007-2011, 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_drv.h"
  42 #include "psb_fb.h"
  43
  44 void psb_spank(struct drm_psb_private *dev_priv)
  45 {
  46         PSB_WSGX32(_PSB_CS_RESET_BIF_RESET | _PSB_CS_RESET_DPM_RESET |
  47                 _PSB_CS_RESET_TA_RESET | _PSB_CS_RESET_USE_RESET |
  48                 _PSB_CS_RESET_ISP_RESET | _PSB_CS_RESET_TSP_RESET |
  49                 _PSB_CS_RESET_TWOD_RESET, PSB_CR_SOFT_RESET);
  50         (void) PSB_RSGX32(PSB_CR_SOFT_RESET);
  51
  52         msleep(1);
  53
  54         PSB_WSGX32(0, PSB_CR_SOFT_RESET);
  55         wmb();
  56         PSB_WSGX32(PSB_RSGX32(PSB_CR_BIF_CTRL) | _PSB_CB_CTRL_CLEAR_FAULT,
  57                    PSB_CR_BIF_CTRL);
  58         wmb();
  59         (void) PSB_RSGX32(PSB_CR_BIF_CTRL);
  60
  61         msleep(1);
  62         PSB_WSGX32(PSB_RSGX32(PSB_CR_BIF_CTRL) & ~_PSB_CB_CTRL_CLEAR_FAULT,
  63                    PSB_CR_BIF_CTRL);
  64         (void) PSB_RSGX32(PSB_CR_BIF_CTRL);
  65         PSB_WSGX32(dev_priv->pg->gatt_start, PSB_CR_BIF_TWOD_REQ_BASE);
  66 }
  67
  68 static int psb_2d_wait_available(struct drm_psb_private *dev_priv,
  69                           unsigned size)
  70 {
  71         uint32_t avail = PSB_RSGX32(PSB_CR_2D_SOCIF);
  72         unsigned long t = jiffies + HZ;
  73
  74         while(avail < size) {
  75                 avail = PSB_RSGX32(PSB_CR_2D_SOCIF);
  76                 if (time_after(jiffies, t)) {
  77                         psb_spank(dev_priv);
  78                         return -EIO;
  79                 }
  80         }
  81         return 0;
  82 }
  83
  84 /* FIXME: Remember if we expose the 2D engine to the DRM we need to serialize
  85    it with console use */
  86
  87 int psbfb_2d_submit(struct drm_psb_private *dev_priv, uint32_t *cmdbuf,
  88                            unsigned size)
  89 {
  90         int ret = 0;
  91         int i;
  92         unsigned submit_size;
  93
  94         while (size > 0) {
  95                 submit_size = (size < 0x60) ? size : 0x60;
  96                 size -= submit_size;
  97                 ret = psb_2d_wait_available(dev_priv, submit_size);
  98                 if (ret)
  99                         return ret;
 100
 101                 submit_size <<= 2;
 102                 for (i = 0; i < submit_size; i += 4) {
 103                         PSB_WSGX32(*cmdbuf++, PSB_SGX_2D_SLAVE_PORT + i);
 104                 }
 105                 (void)PSB_RSGX32(PSB_SGX_2D_SLAVE_PORT + i - 4);
 106         }
 107         return 0;
 108 }
 109
 110 static int psb_accel_2d_fillrect(struct drm_psb_private *dev_priv,
 111                                  uint32_t dst_offset, uint32_t dst_stride,
 112                                  uint32_t dst_format, uint16_t dst_x,
 113                                  uint16_t dst_y, uint16_t size_x,
 114                                  uint16_t size_y, uint32_t fill)
 115 {
 116         uint32_t buffer[10];
 117         uint32_t *buf;
 118
 119         buf = buffer;
 120
 121         *buf++ = PSB_2D_FENCE_BH;
 122
 123         *buf++ =
 124             PSB_2D_DST_SURF_BH | dst_format | (dst_stride <<
 125                                                PSB_2D_DST_STRIDE_SHIFT);
 126         *buf++ = dst_offset;
 127
 128         *buf++ =
 129             PSB_2D_BLIT_BH |
 130             PSB_2D_ROT_NONE |
 131             PSB_2D_COPYORDER_TL2BR |
 132             PSB_2D_DSTCK_DISABLE |
 133             PSB_2D_SRCCK_DISABLE | PSB_2D_USE_FILL | PSB_2D_ROP3_PATCOPY;
 134
 135         *buf++ = fill << PSB_2D_FILLCOLOUR_SHIFT;
 136         *buf++ =
 137             (dst_x << PSB_2D_DST_XSTART_SHIFT) | (dst_y <<
 138                                                   PSB_2D_DST_YSTART_SHIFT);
 139         *buf++ =
 140             (size_x << PSB_2D_DST_XSIZE_SHIFT) | (size_y <<
 141                                                   PSB_2D_DST_YSIZE_SHIFT);
 142         *buf++ = PSB_2D_FLUSH_BH;
 143
 144         return psbfb_2d_submit(dev_priv, buffer, buf - buffer);
 145 }
 146
 147 static void psbfb_fillrect_accel(struct fb_info *info,
 148                                  const struct fb_fillrect *r)
 149 {
 150         struct psb_fbdev *fbdev = info->par;
 151         struct psb_framebuffer *psbfb = &fbdev->pfb;
 152         struct drm_device *dev = psbfb->base.dev;
 153         struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;
 154         struct drm_psb_private *dev_priv = dev->dev_private;
 155
 156         uint32_t offset;
 157         uint32_t stride;
 158         uint32_t format;
 159
 160         if (!fb)
 161                 return;
 162
 163         offset = psbfb->gtt->offset;
 164         stride = fb->pitch;
 165
 166         switch (fb->depth) {
 167         case 8:
 168                 format = PSB_2D_DST_332RGB;
 169                 break;
 170         case 15:
 171                 format = PSB_2D_DST_555RGB;
 172                 break;
 173         case 16:
 174                 format = PSB_2D_DST_565RGB;
 175                 break;
 176         case 24:
 177         case 32:
 178                 /* this is wrong but since we don't do blending its okay */
 179                 format = PSB_2D_DST_8888ARGB;
 180                 break;
 181         default:
 182                 /* software fallback */
 183                 cfb_fillrect(info, r);
 184                 return;
 185         }
 186
 187         psb_accel_2d_fillrect(dev_priv,
 188                               offset, stride, format,
 189                               r->dx, r->dy, r->width, r->height, r->color);
 190 }
 191
 192 void psbfb_fillrect(struct fb_info *info,
 193                            const struct fb_fillrect *rect)
 194 {
 195         if (unlikely(info->state != FBINFO_STATE_RUNNING))
 196                 return;
 197
 198         if (1 || (info->flags & FBINFO_HWACCEL_DISABLED))
 199                 return cfb_fillrect(info, rect);
 200
 201         /*psb_check_power_state(dev, PSB_DEVICE_SGX); */
 202         psbfb_fillrect_accel(info, rect);
 203         /* Drop power again here on MRST FIXMEAC */
 204 }
 205
 206 static u32 psb_accel_2d_copy_direction(int xdir, int ydir)
 207 {
 208         if (xdir < 0)
 209                 return (ydir < 0) ? PSB_2D_COPYORDER_BR2TL :
 210                                         PSB_2D_COPYORDER_TR2BL;
 211         else
 212                 return (ydir < 0) ? PSB_2D_COPYORDER_BL2TR :
 213                                         PSB_2D_COPYORDER_TL2BR;
 214 }
 215
 216 /*
 217  * @src_offset in bytes
 218  * @src_stride in bytes
 219  * @src_format psb 2D format defines
 220  * @dst_offset in bytes
 221  * @dst_stride in bytes
 222  * @dst_format psb 2D format defines
 223  * @src_x offset in pixels
 224  * @src_y offset in pixels
 225  * @dst_x offset in pixels
 226  * @dst_y offset in pixels
 227  * @size_x of the copied area
 228  * @size_y of the copied area
 229  */
 230 static int psb_accel_2d_copy(struct drm_psb_private *dev_priv,
 231                              uint32_t src_offset, uint32_t src_stride,
 232                              uint32_t src_format, uint32_t dst_offset,
 233                              uint32_t dst_stride, uint32_t dst_format,
 234                              uint16_t src_x, uint16_t src_y,
 235                              uint16_t dst_x, uint16_t dst_y,
 236                              uint16_t size_x, uint16_t size_y)
 237 {
 238         uint32_t blit_cmd;
 239         uint32_t buffer[10];
 240         uint32_t *buf;
 241         uint32_t direction;
 242
 243         buf = buffer;
 244
 245         direction =
 246             psb_accel_2d_copy_direction(src_x - dst_x, src_y - dst_y);
 247
 248         if (direction == PSB_2D_COPYORDER_BR2TL ||
 249             direction == PSB_2D_COPYORDER_TR2BL) {
 250                 src_x += size_x - 1;
 251                 dst_x += size_x - 1;
 252         }
 253         if (direction == PSB_2D_COPYORDER_BR2TL ||
 254             direction == PSB_2D_COPYORDER_BL2TR) {
 255                 src_y += size_y - 1;
 256                 dst_y += size_y - 1;
 257         }
 258
 259         blit_cmd =
 260             PSB_2D_BLIT_BH |
 261             PSB_2D_ROT_NONE |
 262             PSB_2D_DSTCK_DISABLE |
 263             PSB_2D_SRCCK_DISABLE |
 264             PSB_2D_USE_PAT | PSB_2D_ROP3_SRCCOPY | direction;
 265
 266         *buf++ = PSB_2D_FENCE_BH;
 267         *buf++ =
 268             PSB_2D_DST_SURF_BH | dst_format | (dst_stride <<
 269                                                PSB_2D_DST_STRIDE_SHIFT);
 270         *buf++ = dst_offset;
 271         *buf++ =
 272             PSB_2D_SRC_SURF_BH | src_format | (src_stride <<
 273                                                PSB_2D_SRC_STRIDE_SHIFT);
 274         *buf++ = src_offset;
 275         *buf++ =
 276             PSB_2D_SRC_OFF_BH | (src_x << PSB_2D_SRCOFF_XSTART_SHIFT) |
 277             (src_y << PSB_2D_SRCOFF_YSTART_SHIFT);
 278         *buf++ = blit_cmd;
 279         *buf++ =
 280             (dst_x << PSB_2D_DST_XSTART_SHIFT) | (dst_y <<
 281                                                   PSB_2D_DST_YSTART_SHIFT);
 282         *buf++ =
 283             (size_x << PSB_2D_DST_XSIZE_SHIFT) | (size_y <<
 284                                                   PSB_2D_DST_YSIZE_SHIFT);
 285         *buf++ = PSB_2D_FLUSH_BH;
 286
 287         return psbfb_2d_submit(dev_priv, buffer, buf - buffer);
 288 }
 289
 290 static void psbfb_copyarea_accel(struct fb_info *info,
 291                                  const struct fb_copyarea *a)
 292 {
 293         struct psb_fbdev *fbdev = info->par;
 294         struct psb_framebuffer *psbfb = &fbdev->pfb;
 295         struct drm_device *dev = psbfb->base.dev;
 296         struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;
 297         struct drm_psb_private *dev_priv = dev->dev_private;
 298         uint32_t offset;
 299         uint32_t stride;
 300         uint32_t src_format;
 301         uint32_t dst_format;
 302
 303         if (!fb)
 304                 return;
 305
 306         offset = psbfb->gtt->offset;
 307         stride = fb->pitch;
 308
 309         switch (fb->depth) {
 310         case 8:
 311                 src_format = PSB_2D_SRC_332RGB;
 312                 dst_format = PSB_2D_DST_332RGB;
 313                 break;
 314         case 15:
 315                 src_format = PSB_2D_SRC_555RGB;
 316                 dst_format = PSB_2D_DST_555RGB;
 317                 break;
 318         case 16:
 319                 src_format = PSB_2D_SRC_565RGB;
 320                 dst_format = PSB_2D_DST_565RGB;
 321                 break;
 322         case 24:
 323         case 32:
 324                 /* this is wrong but since we don't do blending its okay */
 325                 src_format = PSB_2D_SRC_8888ARGB;
 326                 dst_format = PSB_2D_DST_8888ARGB;
 327                 break;
 328         default:
 329                 /* software fallback */
 330                 cfb_copyarea(info, a);
 331                 return;
 332         }
 333
 334         psb_accel_2d_copy(dev_priv,
 335                           offset, stride, src_format,
 336                           offset, stride, dst_format,
 337                           a->sx, a->sy, a->dx, a->dy, a->width, a->height);
 338 }
 339
 340 void psbfb_copyarea(struct fb_info *info,
 341                            const struct fb_copyarea *region)
 342 {
 343         if (unlikely(info->state != FBINFO_STATE_RUNNING))
 344                 return;
 345
 346         if (info->flags & FBINFO_HWACCEL_DISABLED)
 347                 return cfb_copyarea(info, region);
 348
 349         /* psb_check_power_state(dev, PSB_DEVICE_SGX); */
 350         psbfb_copyarea_accel(info, region);
 351         /* Need to power back off here for MRST FIXMEAC */
 352 }
 353
 354 void psbfb_imageblit(struct fb_info *info, const struct fb_image *image)
 355 {
 356         /* For now */
 357         cfb_imageblit(info, image);
 358 }
 359
 360 int psbfb_sync(struct fb_info *info)
 361 {
 362         struct psb_fbdev *fbdev = info->par;
 363         struct psb_framebuffer *psbfb = &fbdev->pfb;
 364         struct drm_device *dev = psbfb->base.dev;
 365         struct drm_psb_private *dev_priv = dev->dev_private;
 366         unsigned long _end = jiffies + DRM_HZ;
 367         int busy = 0;
 368
 369         /*
 370          * First idle the 2D engine.
 371          */
 372
 373         if ((PSB_RSGX32(PSB_CR_2D_SOCIF) == _PSB_C2_SOCIF_EMPTY) &&
 374             ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) & _PSB_C2B_STATUS_BUSY) == 0))
 375                 goto out;
 376
 377         do {
 378                 busy = (PSB_RSGX32(PSB_CR_2D_SOCIF) != _PSB_C2_SOCIF_EMPTY);
 379                 cpu_relax();
 380         } while (busy && !time_after_eq(jiffies, _end));
 381
 382         if (busy)
 383                 busy = (PSB_RSGX32(PSB_CR_2D_SOCIF) != _PSB_C2_SOCIF_EMPTY);
 384         if (busy)
 385                 goto out;
 386
 387         do {
 388                 busy = ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) &
 389                                                 _PSB_C2B_STATUS_BUSY) != 0);
 390                 cpu_relax();
 391         } while (busy && !time_after_eq(jiffies, _end));
 392         if (busy)
 393                 busy = ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) &
 394                                         _PSB_C2B_STATUS_BUSY) != 0);
 395
 396 out:
 397         return (busy) ? -EBUSY : 0;
 398 }