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_R8,
  29                                                             DRM_FORMAT_UYVY, DRM_FORMAT_YUYV };
  30
  31 static const uint32_t texture_source_formats[] = { DRM_FORMAT_YVU420, DRM_FORMAT_YVU420_ANDROID };
  32
  33 struct i915_device {
  34         uint32_t gen;
  35         int32_t has_llc;
  36 };
  37
  38 static uint32_t i915_get_gen(int device_id)
  39 {
  40         const uint16_t gen3_ids[] = { 0x2582, 0x2592, 0x2772, 0x27A2, 0x27AE,
  41                                       0x29C2, 0x29B2, 0x29D2, 0xA001, 0xA011 };
  42         unsigned i;
  43         for (i = 0; i < ARRAY_SIZE(gen3_ids); i++)
  44                 if (gen3_ids[i] == device_id)
  45                         return 3;
  46
  47         return 4;
  48 }
  49
  50 static int i915_add_kms_item(struct driver *drv, const struct kms_item *item)
  51 {
  52         uint32_t i;
  53         struct combination *combo;
  54
  55         /*
  56          * Older hardware can't scanout Y-tiled formats. Newer devices can, and
  57          * report this functionality via format modifiers.
  58          */
  59         for (i = 0; i < drv->backend->combos.size; i++) {
  60                 combo = &drv->backend->combos.data[i];
  61                 if (combo->format == item->format) {
  62                         if ((combo->metadata.tiling == I915_TILING_Y &&
  63                              item->modifier == I915_FORMAT_MOD_Y_TILED) ||
  64                             (combo->metadata.tiling == I915_TILING_X &&
  65                              item->modifier == I915_FORMAT_MOD_X_TILED)) {
  66                                 combo->metadata.modifier = item->modifier;
  67                                 combo->usage |= item->usage;
  68                         } else if (combo->metadata.tiling != I915_TILING_Y) {
  69                                 combo->usage |= item->usage;
  70                         }
  71                 }
  72         }
  73
  74         return 0;
  75 }
  76
  77 static int i915_add_combinations(struct driver *drv)
  78 {
  79         int ret;
  80         uint32_t i, num_items;
  81         struct kms_item *items;
  82         struct format_metadata metadata;
  83         uint64_t render_flags, texture_flags;
  84
  85         render_flags = BO_USE_RENDER_MASK;
  86         texture_flags = BO_USE_TEXTURE_MASK;
  87
  88         metadata.tiling = I915_TILING_NONE;
  89         metadata.priority = 1;
  90         metadata.modifier = DRM_FORMAT_MOD_NONE;
  91
  92         ret = drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
  93                                    &metadata, render_flags);
  94         if (ret)
  95                 return ret;
  96
  97         ret = drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
  98                                    &metadata, texture_flags);
  99         if (ret)
 100                 return ret;
 101
 102         ret = drv_add_combinations(drv, tileable_texture_source_formats,
 103                                    ARRAY_SIZE(tileable_texture_source_formats), &metadata,
 104                                    texture_flags);
 105         if (ret)
 106                 return ret;
 107
 108         drv_modify_combination(drv, DRM_FORMAT_XRGB8888, &metadata, BO_USE_CURSOR | BO_USE_SCANOUT);
 109         drv_modify_combination(drv, DRM_FORMAT_ARGB8888, &metadata, BO_USE_CURSOR | BO_USE_SCANOUT);
 110
 111         render_flags &= ~BO_USE_SW_WRITE_OFTEN;
 112         render_flags &= ~BO_USE_SW_READ_OFTEN;
 113         render_flags &= ~BO_USE_LINEAR;
 114
 115         texture_flags &= ~BO_USE_SW_WRITE_OFTEN;
 116         texture_flags &= ~BO_USE_SW_READ_OFTEN;
 117         texture_flags &= ~BO_USE_LINEAR;
 118
 119         metadata.tiling = I915_TILING_X;
 120         metadata.priority = 2;
 121
 122         ret = drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
 123                                    &metadata, render_flags);
 124         if (ret)
 125                 return ret;
 126
 127         ret = drv_add_combinations(drv, tileable_texture_source_formats,
 128                                    ARRAY_SIZE(tileable_texture_source_formats), &metadata,
 129                                    texture_flags);
 130         if (ret)
 131                 return ret;
 132
 133         metadata.tiling = I915_TILING_Y;
 134         metadata.priority = 3;
 135
 136         ret = drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
 137                                    &metadata, render_flags);
 138         if (ret)
 139                 return ret;
 140
 141         ret = drv_add_combinations(drv, tileable_texture_source_formats,
 142                                    ARRAY_SIZE(tileable_texture_source_formats), &metadata,
 143                                    texture_flags);
 144         if (ret)
 145                 return ret;
 146
 147         items = drv_query_kms(drv, &num_items);
 148         if (!items || !num_items)
 149                 return 0;
 150
 151         for (i = 0; i < num_items; i++) {
 152                 ret = i915_add_kms_item(drv, &items[i]);
 153                 if (ret) {
 154                         free(items);
 155                         return ret;
 156                 }
 157         }
 158
 159         free(items);
 160         return 0;
 161 }
 162
 163 static int i915_align_dimensions(struct bo *bo, uint32_t tiling, uint32_t *stride,
 164                                  uint32_t *aligned_height)
 165 {
 166         struct i915_device *i915 = bo->drv->priv;
 167         uint32_t horizontal_alignment = 4;
 168         uint32_t vertical_alignment = 4;
 169
 170         switch (tiling) {
 171         default:
 172         case I915_TILING_NONE:
 173                 horizontal_alignment = 64;
 174                 break;
 175
 176         case I915_TILING_X:
 177                 horizontal_alignment = 512;
 178                 vertical_alignment = 8;
 179                 break;
 180
 181         case I915_TILING_Y:
 182                 if (i915->gen == 3) {
 183                         horizontal_alignment = 512;
 184                         vertical_alignment = 8;
 185                 } else {
 186                         horizontal_alignment = 128;
 187                         vertical_alignment = 32;
 188                 }
 189                 break;
 190         }
 191
 192         *aligned_height = ALIGN(bo->height, vertical_alignment);
 193         if (i915->gen > 3) {
 194                 *stride = ALIGN(*stride, horizontal_alignment);
 195         } else {
 196                 while (*stride > horizontal_alignment)
 197                         horizontal_alignment <<= 1;
 198
 199                 *stride = horizontal_alignment;
 200         }
 201
 202         if (i915->gen <= 3 && *stride > 8192)
 203                 return -EINVAL;
 204
 205         return 0;
 206 }
 207
 208 static void i915_clflush(void *start, size_t size)
 209 {
 210         void *p = (void *)(((uintptr_t)start) & ~I915_CACHELINE_MASK);
 211         void *end = (void *)((uintptr_t)start + size);
 212
 213         __builtin_ia32_mfence();
 214         while (p < end) {
 215                 __builtin_ia32_clflush(p);
 216                 p = (void *)((uintptr_t)p + I915_CACHELINE_SIZE);
 217         }
 218 }
 219
 220 static int i915_init(struct driver *drv)
 221 {
 222         int ret;
 223         int device_id;
 224         struct i915_device *i915;
 225         drm_i915_getparam_t get_param;
 226
 227         i915 = calloc(1, sizeof(*i915));
 228         if (!i915)
 229                 return -ENOMEM;
 230
 231         memset(&get_param, 0, sizeof(get_param));
 232         get_param.param = I915_PARAM_CHIPSET_ID;
 233         get_param.value = &device_id;
 234         ret = drmIoctl(drv->fd, DRM_IOCTL_I915_GETPARAM, &get_param);
 235         if (ret) {
 236                 fprintf(stderr, "drv: Failed to get I915_PARAM_CHIPSET_ID\n");
 237                 free(i915);
 238                 return -EINVAL;
 239         }
 240
 241         i915->gen = i915_get_gen(device_id);
 242
 243         memset(&get_param, 0, sizeof(get_param));
 244         get_param.param = I915_PARAM_HAS_LLC;
 245         get_param.value = &i915->has_llc;
 246         ret = drmIoctl(drv->fd, DRM_IOCTL_I915_GETPARAM, &get_param);
 247         if (ret) {
 248                 fprintf(stderr, "drv: Failed to get I915_PARAM_HAS_LLC\n");
 249                 free(i915);
 250                 return -EINVAL;
 251         }
 252
 253         drv->priv = i915;
 254
 255         return i915_add_combinations(drv);
 256 }
 257
 258 static int i915_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
 259                           uint32_t flags)
 260 {
 261         int ret;
 262         size_t plane;
 263         uint32_t stride;
 264         struct drm_i915_gem_create gem_create;
 265         struct drm_i915_gem_set_tiling gem_set_tiling;
 266
 267         if (flags & (BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN))
 268                 bo->tiling = I915_TILING_NONE;
 269         else if (flags & BO_USE_SCANOUT)
 270                 bo->tiling = I915_TILING_X;
 271         else
 272                 bo->tiling = I915_TILING_Y;
 273
 274         if (format == DRM_FORMAT_YVU420 || format == DRM_FORMAT_YVU420_ANDROID)
 275                 bo->tiling = I915_TILING_NONE;
 276
 277         stride = drv_stride_from_format(format, width, 0);
 278
 279         ret = i915_align_dimensions(bo, bo->tiling, &stride, &height);
 280         if (ret)
 281                 return ret;
 282
 283         /*
 284          * Align the Y plane to 128 bytes so the chroma planes would be aligned
 285          * to 64 byte boundaries. This is an Intel HW requirement.
 286          */
 287         if (format == DRM_FORMAT_YVU420)
 288                 stride = ALIGN(stride, 128);
 289
 290         /*
 291          * HAL_PIXEL_FORMAT_YV12 requires that the buffer's height not be aligned.
 292          */
 293         if (format == DRM_FORMAT_YVU420_ANDROID)
 294                 height = bo->height;
 295
 296         drv_bo_from_format(bo, stride, height, format);
 297
 298         memset(&gem_create, 0, sizeof(gem_create));
 299         gem_create.size = bo->total_size;
 300
 301         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create);
 302         if (ret) {
 303                 fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_CREATE failed (size=%llu)\n",
 304                         gem_create.size);
 305                 return ret;
 306         }
 307
 308         for (plane = 0; plane < bo->num_planes; plane++)
 309                 bo->handles[plane].u32 = gem_create.handle;
 310
 311         memset(&gem_set_tiling, 0, sizeof(gem_set_tiling));
 312         gem_set_tiling.handle = bo->handles[0].u32;
 313         gem_set_tiling.tiling_mode = bo->tiling;
 314         gem_set_tiling.stride = bo->strides[0];
 315
 316         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_SET_TILING, &gem_set_tiling);
 317         if (ret) {
 318                 struct drm_gem_close gem_close;
 319                 memset(&gem_close, 0, sizeof(gem_close));
 320                 gem_close.handle = bo->handles[0].u32;
 321                 drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
 322
 323                 fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_SET_TILING failed with %d", errno);
 324                 return -errno;
 325         }
 326
 327         return 0;
 328 }
 329
 330 static void i915_close(struct driver *drv)
 331 {
 332         free(drv->priv);
 333         drv->priv = NULL;
 334 }
 335
 336 static int i915_bo_import(struct bo *bo, struct drv_import_fd_data *data)
 337 {
 338         int ret;
 339         struct drm_i915_gem_get_tiling gem_get_tiling;
 340
 341         ret = drv_prime_bo_import(bo, data);
 342         if (ret)
 343                 return ret;
 344
 345         /* TODO(gsingh): export modifiers and get rid of backdoor tiling. */
 346         memset(&gem_get_tiling, 0, sizeof(gem_get_tiling));
 347         gem_get_tiling.handle = bo->handles[0].u32;
 348
 349         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_GET_TILING, &gem_get_tiling);
 350         if (ret) {
 351                 fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_GET_TILING failed.");
 352                 return ret;
 353         }
 354
 355         bo->tiling = gem_get_tiling.tiling_mode;
 356         return 0;
 357 }
 358
 359 static void *i915_bo_map(struct bo *bo, struct map_info *data, size_t plane)
 360 {
 361         int ret;
 362         void *addr;
 363         struct drm_i915_gem_set_domain set_domain;
 364
 365         memset(&set_domain, 0, sizeof(set_domain));
 366         set_domain.handle = bo->handles[0].u32;
 367         if (bo->tiling == I915_TILING_NONE) {
 368                 struct drm_i915_gem_mmap gem_map;
 369                 memset(&gem_map, 0, sizeof(gem_map));
 370
 371                 gem_map.handle = bo->handles[0].u32;
 372                 gem_map.offset = 0;
 373                 gem_map.size = bo->total_size;
 374
 375                 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_MMAP, &gem_map);
 376                 if (ret) {
 377                         fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_MMAP failed\n");
 378                         return MAP_FAILED;
 379                 }
 380
 381                 addr = (void *)(uintptr_t)gem_map.addr_ptr;
 382                 set_domain.read_domains = I915_GEM_DOMAIN_CPU;
 383                 set_domain.write_domain = I915_GEM_DOMAIN_CPU;
 384
 385         } else {
 386                 struct drm_i915_gem_mmap_gtt gem_map;
 387                 memset(&gem_map, 0, sizeof(gem_map));
 388
 389                 gem_map.handle = bo->handles[0].u32;
 390
 391                 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &gem_map);
 392                 if (ret) {
 393                         fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_MMAP_GTT failed\n");
 394                         return MAP_FAILED;
 395                 }
 396
 397                 addr = mmap(0, bo->total_size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->drv->fd,
 398                             gem_map.offset);
 399
 400                 set_domain.read_domains = I915_GEM_DOMAIN_GTT;
 401                 set_domain.write_domain = I915_GEM_DOMAIN_GTT;
 402         }
 403
 404         if (addr == MAP_FAILED) {
 405                 fprintf(stderr, "drv: i915 GEM mmap failed\n");
 406                 return addr;
 407         }
 408
 409         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain);
 410         if (ret) {
 411                 fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_SET_DOMAIN failed\n");
 412                 return MAP_FAILED;
 413         }
 414
 415         data->length = bo->total_size;
 416         return addr;
 417 }
 418
 419 static int i915_bo_unmap(struct bo *bo, struct map_info *data)
 420 {
 421         struct i915_device *i915 = bo->drv->priv;
 422         if (!i915->has_llc && bo->tiling == I915_TILING_NONE)
 423                 i915_clflush(data->addr, data->length);
 424
 425         return munmap(data->addr, data->length);
 426 }
 427
 428 static uint32_t i915_resolve_format(uint32_t format)
 429 {
 430         switch (format) {
 431         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
 432                 /*HACK: See b/28671744 */
 433                 return DRM_FORMAT_XBGR8888;
 434         case DRM_FORMAT_FLEX_YCbCr_420_888:
 435                 return DRM_FORMAT_YVU420;
 436         default:
 437                 return format;
 438         }
 439 }
 440
 441 struct backend backend_i915 = {
 442         .name = "i915",
 443         .init = i915_init,
 444         .close = i915_close,
 445         .bo_create = i915_bo_create,
 446         .bo_destroy = drv_gem_bo_destroy,
 447         .bo_import = i915_bo_import,
 448         .bo_map = i915_bo_map,
 449         .bo_unmap = i915_bo_unmap,
 450         .resolve_format = i915_resolve_format,
 451 };
 452
 453 #endif