i915.c

   1 /*
   2  * Copyright 2014 The Chromium OS Authors. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6
   7 #ifdef DRV_I915
   8
   9 #include <errno.h>
  10 #include <i915_drm.h>
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <sys/mman.h>
  14 #include <xf86drm.h>
  15
  16 #include "drv_priv.h"
  17 #include "helpers.h"
  18 #include "util.h"
  19
  20 #define I915_CACHELINE_SIZE 64
  21 #define I915_CACHELINE_MASK (I915_CACHELINE_SIZE - 1)
  22
  23 static const uint32_t render_target_formats[] = { DRM_FORMAT_ARGB1555, DRM_FORMAT_ABGR8888,
  24                                                   DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565,
  25                                                   DRM_FORMAT_XBGR8888, DRM_FORMAT_XRGB1555,
  26                                                   DRM_FORMAT_XRGB8888 };
  27
  28 static const uint32_t tileable_texture_source_formats[] = { DRM_FORMAT_GR88, DRM_FORMAT_NV12,
  29                                                             DRM_FORMAT_R8, DRM_FORMAT_UYVY,
  30                                                             DRM_FORMAT_YUYV };
  31
  32 static const uint32_t texture_source_formats[] = { DRM_FORMAT_YVU420, DRM_FORMAT_YVU420_ANDROID };
  33
  34 struct i915_device {
  35         uint32_t gen;
  36         int32_t has_llc;
  37 };
  38
  39 static uint32_t i915_get_gen(int device_id)
  40 {
  41         const uint16_t gen3_ids[] = { 0x2582, 0x2592, 0x2772, 0x27A2, 0x27AE,
  42                                       0x29C2, 0x29B2, 0x29D2, 0xA001, 0xA011 };
  43         unsigned i;
  44         for (i = 0; i < ARRAY_SIZE(gen3_ids); i++)
  45                 if (gen3_ids[i] == device_id)
  46                         return 3;
  47
  48         return 4;
  49 }
  50
  51 static int i915_add_kms_item(struct driver *drv, const struct kms_item *item)
  52 {
  53         uint32_t i;
  54         struct combination *combo;
  55
  56         /*
  57          * Older hardware can't scanout Y-tiled formats. Newer devices can, and
  58          * report this functionality via format modifiers.
  59          */
  60         for (i = 0; i < drv->backend->combos.size; i++) {
  61                 combo = &drv->backend->combos.data[i];
  62                 if (combo->format == item->format) {
  63                         if ((combo->metadata.tiling == I915_TILING_Y &&
  64                              item->modifier == I915_FORMAT_MOD_Y_TILED) ||
  65                             (combo->metadata.tiling == I915_TILING_X &&
  66                              item->modifier == I915_FORMAT_MOD_X_TILED)) {
  67                                 combo->metadata.modifier = item->modifier;
  68                                 combo->usage |= item->usage;
  69                         } else if (combo->metadata.tiling != I915_TILING_Y) {
  70                                 combo->usage |= item->usage;
  71                         }
  72                 }
  73         }
  74
  75         return 0;
  76 }
  77
  78 static int i915_add_combinations(struct driver *drv)
  79 {
  80         int ret;
  81         uint32_t i, num_items;
  82         struct kms_item *items;
  83         struct format_metadata metadata;
  84         uint64_t render_flags, texture_flags;
  85
  86         render_flags = BO_USE_RENDER_MASK;
  87         texture_flags = BO_USE_TEXTURE_MASK;
  88
  89         metadata.tiling = I915_TILING_NONE;
  90         metadata.priority = 1;
  91         metadata.modifier = DRM_FORMAT_MOD_NONE;
  92
  93         ret = drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
  94                                    &metadata, render_flags);
  95         if (ret)
  96                 return ret;
  97
  98         ret = drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
  99                                    &metadata, texture_flags);
 100         if (ret)
 101                 return ret;
 102
 103         ret = drv_add_combinations(drv, tileable_texture_source_formats,
 104                                    ARRAY_SIZE(tileable_texture_source_formats), &metadata,
 105                                    texture_flags);
 106         if (ret)
 107                 return ret;
 108
 109         drv_modify_combination(drv, DRM_FORMAT_XRGB8888, &metadata, BO_USE_CURSOR | BO_USE_SCANOUT);
 110         drv_modify_combination(drv, DRM_FORMAT_ARGB8888, &metadata, BO_USE_CURSOR | BO_USE_SCANOUT);
 111
 112         render_flags &= ~BO_USE_SW_WRITE_OFTEN;
 113         render_flags &= ~BO_USE_SW_READ_OFTEN;
 114         render_flags &= ~BO_USE_LINEAR;
 115
 116         texture_flags &= ~BO_USE_SW_WRITE_OFTEN;
 117         texture_flags &= ~BO_USE_SW_READ_OFTEN;
 118         texture_flags &= ~BO_USE_LINEAR;
 119
 120         metadata.tiling = I915_TILING_X;
 121         metadata.priority = 2;
 122
 123         ret = drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
 124                                    &metadata, render_flags);
 125         if (ret)
 126                 return ret;
 127
 128         ret = drv_add_combinations(drv, tileable_texture_source_formats,
 129                                    ARRAY_SIZE(tileable_texture_source_formats), &metadata,
 130                                    texture_flags);
 131         if (ret)
 132                 return ret;
 133
 134         metadata.tiling = I915_TILING_Y;
 135         metadata.priority = 3;
 136
 137         ret = drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
 138                                    &metadata, render_flags);
 139         if (ret)
 140                 return ret;
 141
 142         ret = drv_add_combinations(drv, tileable_texture_source_formats,
 143                                    ARRAY_SIZE(tileable_texture_source_formats), &metadata,
 144                                    texture_flags);
 145         if (ret)
 146                 return ret;
 147
 148         items = drv_query_kms(drv, &num_items);
 149         if (!items || !num_items)
 150                 return 0;
 151
 152         for (i = 0; i < num_items; i++) {
 153                 ret = i915_add_kms_item(drv, &items[i]);
 154                 if (ret) {
 155                         free(items);
 156                         return ret;
 157                 }
 158         }
 159
 160         free(items);
 161         return 0;
 162 }
 163
 164 static int i915_align_dimensions(struct bo *bo, uint32_t tiling, uint32_t *stride,
 165                                  uint32_t *aligned_height)
 166 {
 167         struct i915_device *i915 = bo->drv->priv;
 168         uint32_t horizontal_alignment = 4;
 169         uint32_t vertical_alignment = 4;
 170
 171         switch (tiling) {
 172         default:
 173         case I915_TILING_NONE:
 174                 horizontal_alignment = 64;
 175                 break;
 176
 177         case I915_TILING_X:
 178                 horizontal_alignment = 512;
 179                 vertical_alignment = 8;
 180                 break;
 181
 182         case I915_TILING_Y:
 183                 if (i915->gen == 3) {
 184                         horizontal_alignment = 512;
 185                         vertical_alignment = 8;
 186                 } else {
 187                         horizontal_alignment = 128;
 188                         vertical_alignment = 32;
 189                 }
 190                 break;
 191         }
 192
 193         *aligned_height = ALIGN(bo->height, vertical_alignment);
 194         if (i915->gen > 3) {
 195                 *stride = ALIGN(*stride, horizontal_alignment);
 196         } else {
 197                 while (*stride > horizontal_alignment)
 198                         horizontal_alignment <<= 1;
 199
 200                 *stride = horizontal_alignment;
 201         }
 202
 203         if (i915->gen <= 3 && *stride > 8192)
 204                 return -EINVAL;
 205
 206         return 0;
 207 }
 208
 209 static void i915_clflush(void *start, size_t size)
 210 {
 211         void *p = (void *)(((uintptr_t)start) & ~I915_CACHELINE_MASK);
 212         void *end = (void *)((uintptr_t)start + size);
 213
 214         __builtin_ia32_mfence();
 215         while (p < end) {
 216                 __builtin_ia32_clflush(p);
 217                 p = (void *)((uintptr_t)p + I915_CACHELINE_SIZE);
 218         }
 219 }
 220
 221 static int i915_init(struct driver *drv)
 222 {
 223         int ret;
 224         int device_id;
 225         struct i915_device *i915;
 226         drm_i915_getparam_t get_param;
 227
 228         i915 = calloc(1, sizeof(*i915));
 229         if (!i915)
 230                 return -ENOMEM;
 231
 232         memset(&get_param, 0, sizeof(get_param));
 233         get_param.param = I915_PARAM_CHIPSET_ID;
 234         get_param.value = &device_id;
 235         ret = drmIoctl(drv->fd, DRM_IOCTL_I915_GETPARAM, &get_param);
 236         if (ret) {
 237                 fprintf(stderr, "drv: Failed to get I915_PARAM_CHIPSET_ID\n");
 238                 free(i915);
 239                 return -EINVAL;
 240         }
 241
 242         i915->gen = i915_get_gen(device_id);
 243
 244         memset(&get_param, 0, sizeof(get_param));
 245         get_param.param = I915_PARAM_HAS_LLC;
 246         get_param.value = &i915->has_llc;
 247         ret = drmIoctl(drv->fd, DRM_IOCTL_I915_GETPARAM, &get_param);
 248         if (ret) {
 249                 fprintf(stderr, "drv: Failed to get I915_PARAM_HAS_LLC\n");
 250                 free(i915);
 251                 return -EINVAL;
 252         }
 253
 254         drv->priv = i915;
 255
 256         return i915_add_combinations(drv);
 257 }
 258
 259 static int i915_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
 260                           uint32_t flags)
 261 {
 262         int ret;
 263         size_t plane;
 264         uint32_t stride;
 265         struct drm_i915_gem_create gem_create;
 266         struct drm_i915_gem_set_tiling gem_set_tiling;
 267
 268         if (flags & (BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN))
 269                 bo->tiling = I915_TILING_NONE;
 270         else if (flags & BO_USE_SCANOUT)
 271                 bo->tiling = I915_TILING_X;
 272         else
 273                 bo->tiling = I915_TILING_Y;
 274
 275         if (format == DRM_FORMAT_YVU420 || format == DRM_FORMAT_YVU420_ANDROID)
 276                 bo->tiling = I915_TILING_NONE;
 277
 278         stride = drv_stride_from_format(format, width, 0);
 279
 280         ret = i915_align_dimensions(bo, bo->tiling, &stride, &height);
 281         if (ret)
 282                 return ret;
 283
 284         /*
 285          * Align the Y plane to 128 bytes so the chroma planes would be aligned
 286          * to 64 byte boundaries. This is an Intel HW requirement.
 287          */
 288         if (format == DRM_FORMAT_YVU420)
 289                 stride = ALIGN(stride, 128);
 290
 291         /*
 292          * HAL_PIXEL_FORMAT_YV12 requires that the buffer's height not be aligned.
 293          */
 294         if (format == DRM_FORMAT_YVU420_ANDROID)
 295                 height = bo->height;
 296
 297         drv_bo_from_format(bo, stride, height, format);
 298
 299         memset(&gem_create, 0, sizeof(gem_create));
 300         gem_create.size = bo->total_size;
 301
 302         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create);
 303         if (ret) {
 304                 fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_CREATE failed (size=%llu)\n",
 305                         gem_create.size);
 306                 return ret;
 307         }
 308
 309         for (plane = 0; plane < bo->num_planes; plane++)
 310                 bo->handles[plane].u32 = gem_create.handle;
 311
 312         memset(&gem_set_tiling, 0, sizeof(gem_set_tiling));
 313         gem_set_tiling.handle = bo->handles[0].u32;
 314         gem_set_tiling.tiling_mode = bo->tiling;
 315         gem_set_tiling.stride = bo->strides[0];
 316
 317         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_SET_TILING, &gem_set_tiling);
 318         if (ret) {
 319                 struct drm_gem_close gem_close;
 320                 memset(&gem_close, 0, sizeof(gem_close));
 321                 gem_close.handle = bo->handles[0].u32;
 322                 drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
 323
 324                 fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_SET_TILING failed with %d", errno);
 325                 return -errno;
 326         }
 327
 328         return 0;
 329 }
 330
 331 static void i915_close(struct driver *drv)
 332 {
 333         free(drv->priv);
 334         drv->priv = NULL;
 335 }
 336
 337 static int i915_bo_import(struct bo *bo, struct drv_import_fd_data *data)
 338 {
 339         int ret;
 340         struct drm_i915_gem_get_tiling gem_get_tiling;
 341
 342         ret = drv_prime_bo_import(bo, data);
 343         if (ret)
 344                 return ret;
 345
 346         /* TODO(gsingh): export modifiers and get rid of backdoor tiling. */
 347         memset(&gem_get_tiling, 0, sizeof(gem_get_tiling));
 348         gem_get_tiling.handle = bo->handles[0].u32;
 349
 350         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_GET_TILING, &gem_get_tiling);
 351         if (ret) {
 352                 fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_GET_TILING failed.");
 353                 return ret;
 354         }
 355
 356         bo->tiling = gem_get_tiling.tiling_mode;
 357         return 0;
 358 }
 359
 360 static void *i915_bo_map(struct bo *bo, struct map_info *data, size_t plane)
 361 {
 362         int ret;
 363         void *addr;
 364         struct drm_i915_gem_set_domain set_domain;
 365
 366         memset(&set_domain, 0, sizeof(set_domain));
 367         set_domain.handle = bo->handles[0].u32;
 368         if (bo->tiling == I915_TILING_NONE) {
 369                 struct drm_i915_gem_mmap gem_map;
 370                 memset(&gem_map, 0, sizeof(gem_map));
 371
 372                 gem_map.handle = bo->handles[0].u32;
 373                 gem_map.offset = 0;
 374                 gem_map.size = bo->total_size;
 375
 376                 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_MMAP, &gem_map);
 377                 if (ret) {
 378                         fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_MMAP failed\n");
 379                         return MAP_FAILED;
 380                 }
 381
 382                 addr = (void *)(uintptr_t)gem_map.addr_ptr;
 383                 set_domain.read_domains = I915_GEM_DOMAIN_CPU;
 384                 set_domain.write_domain = I915_GEM_DOMAIN_CPU;
 385
 386         } else {
 387                 struct drm_i915_gem_mmap_gtt gem_map;
 388                 memset(&gem_map, 0, sizeof(gem_map));
 389
 390                 gem_map.handle = bo->handles[0].u32;
 391
 392                 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &gem_map);
 393                 if (ret) {
 394                         fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_MMAP_GTT failed\n");
 395                         return MAP_FAILED;
 396                 }
 397
 398                 addr = mmap(0, bo->total_size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->drv->fd,
 399                             gem_map.offset);
 400
 401                 set_domain.read_domains = I915_GEM_DOMAIN_GTT;
 402                 set_domain.write_domain = I915_GEM_DOMAIN_GTT;
 403         }
 404
 405         if (addr == MAP_FAILED) {
 406                 fprintf(stderr, "drv: i915 GEM mmap failed\n");
 407                 return addr;
 408         }
 409
 410         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain);
 411         if (ret) {
 412                 fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_SET_DOMAIN failed\n");
 413                 return MAP_FAILED;
 414         }
 415
 416         data->length = bo->total_size;
 417         return addr;
 418 }
 419
 420 static int i915_bo_unmap(struct bo *bo, struct map_info *data)
 421 {
 422         struct i915_device *i915 = bo->drv->priv;
 423         if (!i915->has_llc && bo->tiling == I915_TILING_NONE)
 424                 i915_clflush(data->addr, data->length);
 425
 426         return munmap(data->addr, data->length);
 427 }
 428
 429 static uint32_t i915_resolve_format(uint32_t format)
 430 {
 431         switch (format) {
 432         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
 433                 /*HACK: See b/28671744 */
 434                 return DRM_FORMAT_XBGR8888;
 435         case DRM_FORMAT_FLEX_YCbCr_420_888:
 436                 return DRM_FORMAT_YVU420;
 437         default:
 438                 return format;
 439         }
 440 }
 441
 442 struct backend backend_i915 = {
 443         .name = "i915",
 444         .init = i915_init,
 445         .close = i915_close,
 446         .bo_create = i915_bo_create,
 447         .bo_destroy = drv_gem_bo_destroy,
 448         .bo_import = i915_bo_import,
 449         .bo_map = i915_bo_map,
 450         .bo_unmap = i915_bo_unmap,
 451         .resolve_format = i915_resolve_format,
 452 };
 453
 454 #endif