drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "vmwgfx_drv.h"
  29 #include <drm/ttm/ttm_bo_driver.h>
  30 #include <drm/ttm/ttm_placement.h>
  31 #include <drm/ttm/ttm_page_alloc.h>
  32
  33 static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM |
  34         TTM_PL_FLAG_CACHED;
  35
  36 static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM |
  37         TTM_PL_FLAG_CACHED |
  38         TTM_PL_FLAG_NO_EVICT;
  39
  40 static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
  41         TTM_PL_FLAG_CACHED;
  42
  43 static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
  44         TTM_PL_FLAG_CACHED;
  45
  46 static uint32_t gmr_ne_placement_flags = VMW_PL_FLAG_GMR |
  47         TTM_PL_FLAG_CACHED |
  48         TTM_PL_FLAG_NO_EVICT;
  49
  50 struct ttm_placement vmw_vram_placement = {
  51         .fpfn = 0,
  52         .lpfn = 0,
  53         .num_placement = 1,
  54         .placement = &vram_placement_flags,
  55         .num_busy_placement = 1,
  56         .busy_placement = &vram_placement_flags
  57 };
  58
  59 static uint32_t vram_gmr_placement_flags[] = {
  60         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
  61         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
  62 };
  63
  64 static uint32_t gmr_vram_placement_flags[] = {
  65         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED,
  66         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
  67 };
  68
  69 struct ttm_placement vmw_vram_gmr_placement = {
  70         .fpfn = 0,
  71         .lpfn = 0,
  72         .num_placement = 2,
  73         .placement = vram_gmr_placement_flags,
  74         .num_busy_placement = 1,
  75         .busy_placement = &gmr_placement_flags
  76 };
  77
  78 static uint32_t vram_gmr_ne_placement_flags[] = {
  79         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT,
  80         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
  81 };
  82
  83 struct ttm_placement vmw_vram_gmr_ne_placement = {
  84         .fpfn = 0,
  85         .lpfn = 0,
  86         .num_placement = 2,
  87         .placement = vram_gmr_ne_placement_flags,
  88         .num_busy_placement = 1,
  89         .busy_placement = &gmr_ne_placement_flags
  90 };
  91
  92 struct ttm_placement vmw_vram_sys_placement = {
  93         .fpfn = 0,
  94         .lpfn = 0,
  95         .num_placement = 1,
  96         .placement = &vram_placement_flags,
  97         .num_busy_placement = 1,
  98         .busy_placement = &sys_placement_flags
  99 };
 100
 101 struct ttm_placement vmw_vram_ne_placement = {
 102         .fpfn = 0,
 103         .lpfn = 0,
 104         .num_placement = 1,
 105         .placement = &vram_ne_placement_flags,
 106         .num_busy_placement = 1,
 107         .busy_placement = &vram_ne_placement_flags
 108 };
 109
 110 struct ttm_placement vmw_sys_placement = {
 111         .fpfn = 0,
 112         .lpfn = 0,
 113         .num_placement = 1,
 114         .placement = &sys_placement_flags,
 115         .num_busy_placement = 1,
 116         .busy_placement = &sys_placement_flags
 117 };
 118
 119 static uint32_t evictable_placement_flags[] = {
 120         TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED,
 121         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
 122         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
 123 };
 124
 125 struct ttm_placement vmw_evictable_placement = {
 126         .fpfn = 0,
 127         .lpfn = 0,
 128         .num_placement = 3,
 129         .placement = evictable_placement_flags,
 130         .num_busy_placement = 1,
 131         .busy_placement = &sys_placement_flags
 132 };
 133
 134 struct ttm_placement vmw_srf_placement = {
 135         .fpfn = 0,
 136         .lpfn = 0,
 137         .num_placement = 1,
 138         .num_busy_placement = 2,
 139         .placement = &gmr_placement_flags,
 140         .busy_placement = gmr_vram_placement_flags
 141 };
 142
 143 struct vmw_ttm_tt {
 144         struct ttm_tt ttm;
 145         struct vmw_private *dev_priv;
 146         int gmr_id;
 147 };
 148
 149 static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
 150 {
 151         struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
 152
 153         vmw_be->gmr_id = bo_mem->start;
 154
 155         return vmw_gmr_bind(vmw_be->dev_priv, ttm->pages,
 156                             ttm->num_pages, vmw_be->gmr_id);
 157 }
 158
 159 static int vmw_ttm_unbind(struct ttm_tt *ttm)
 160 {
 161         struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
 162
 163         vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 164         return 0;
 165 }
 166
 167 static void vmw_ttm_destroy(struct ttm_tt *ttm)
 168 {
 169         struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
 170
 171         ttm_tt_fini(ttm);
 172         kfree(vmw_be);
 173 }
 174
 175 static struct ttm_backend_func vmw_ttm_func = {
 176         .bind = vmw_ttm_bind,
 177         .unbind = vmw_ttm_unbind,
 178         .destroy = vmw_ttm_destroy,
 179 };
 180
 181 struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
 182                                  unsigned long size, uint32_t page_flags,
 183                                  struct page *dummy_read_page)
 184 {
 185         struct vmw_ttm_tt *vmw_be;
 186
 187         vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
 188         if (!vmw_be)
 189                 return NULL;
 190
 191         vmw_be->ttm.func = &vmw_ttm_func;
 192         vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
 193
 194         if (ttm_tt_init(&vmw_be->ttm, bdev, size, page_flags, dummy_read_page)) {
 195                 kfree(vmw_be);
 196                 return NULL;
 197         }
 198
 199         return &vmw_be->ttm;
 200 }
 201
 202 int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 203 {
 204         return 0;
 205 }
 206
 207 int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 208                       struct ttm_mem_type_manager *man)
 209 {
 210         switch (type) {
 211         case TTM_PL_SYSTEM:
 212                 /* System memory */
 213
 214                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 215                 man->available_caching = TTM_PL_FLAG_CACHED;
 216                 man->default_caching = TTM_PL_FLAG_CACHED;
 217                 break;
 218         case TTM_PL_VRAM:
 219                 /* "On-card" video ram */
 220                 man->func = &ttm_bo_manager_func;
 221                 man->gpu_offset = 0;
 222                 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
 223                 man->available_caching = TTM_PL_FLAG_CACHED;
 224                 man->default_caching = TTM_PL_FLAG_CACHED;
 225                 break;
 226         case VMW_PL_GMR:
 227                 /*
 228                  * "Guest Memory Regions" is an aperture like feature with
 229                  *  one slot per bo. There is an upper limit of the number of
 230                  *  slots as well as the bo size.
 231                  */
 232                 man->func = &vmw_gmrid_manager_func;
 233                 man->gpu_offset = 0;
 234                 man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
 235                 man->available_caching = TTM_PL_FLAG_CACHED;
 236                 man->default_caching = TTM_PL_FLAG_CACHED;
 237                 break;
 238         default:
 239                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 240                 return -EINVAL;
 241         }
 242         return 0;
 243 }
 244
 245 void vmw_evict_flags(struct ttm_buffer_object *bo,
 246                      struct ttm_placement *placement)
 247 {
 248         *placement = vmw_sys_placement;
 249 }
 250
 251 /**
 252  * FIXME: Proper access checks on buffers.
 253  */
 254
 255 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 256 {
 257         return 0;
 258 }
 259
 260 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 261 {
 262         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 263         struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 264
 265         mem->bus.addr = NULL;
 266         mem->bus.is_iomem = false;
 267         mem->bus.offset = 0;
 268         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 269         mem->bus.base = 0;
 270         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 271                 return -EINVAL;
 272         switch (mem->mem_type) {
 273         case TTM_PL_SYSTEM:
 274         case VMW_PL_GMR:
 275                 return 0;
 276         case TTM_PL_VRAM:
 277                 mem->bus.offset = mem->start << PAGE_SHIFT;
 278                 mem->bus.base = dev_priv->vram_start;
 279                 mem->bus.is_iomem = true;
 280                 break;
 281         default:
 282                 return -EINVAL;
 283         }
 284         return 0;
 285 }
 286
 287 static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 288 {
 289 }
 290
 291 static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
 292 {
 293         return 0;
 294 }
 295
 296 /**
 297  * FIXME: We're using the old vmware polling method to sync.
 298  * Do this with fences instead.
 299  */
 300
 301 static void *vmw_sync_obj_ref(void *sync_obj)
 302 {
 303
 304         return (void *)
 305                 vmw_fence_obj_reference((struct vmw_fence_obj *) sync_obj);
 306 }
 307
 308 static void vmw_sync_obj_unref(void **sync_obj)
 309 {
 310         vmw_fence_obj_unreference((struct vmw_fence_obj **) sync_obj);
 311 }
 312
 313 static int vmw_sync_obj_flush(void *sync_obj, void *sync_arg)
 314 {
 315         vmw_fence_obj_flush((struct vmw_fence_obj *) sync_obj);
 316         return 0;
 317 }
 318
 319 static bool vmw_sync_obj_signaled(void *sync_obj, void *sync_arg)
 320 {
 321         unsigned long flags = (unsigned long) sync_arg;
 322         return  vmw_fence_obj_signaled((struct vmw_fence_obj *) sync_obj,
 323                                        (uint32_t) flags);
 324
 325 }
 326
 327 static int vmw_sync_obj_wait(void *sync_obj, void *sync_arg,
 328                              bool lazy, bool interruptible)
 329 {
 330         unsigned long flags = (unsigned long) sync_arg;
 331
 332         return vmw_fence_obj_wait((struct vmw_fence_obj *) sync_obj,
 333                                   (uint32_t) flags,
 334                                   lazy, interruptible,
 335                                   VMW_FENCE_WAIT_TIMEOUT);
 336 }
 337
 338 struct ttm_bo_driver vmw_bo_driver = {
 339         .ttm_tt_create = &vmw_ttm_tt_create,
 340         .ttm_tt_populate = &ttm_pool_populate,
 341         .ttm_tt_unpopulate = &ttm_pool_unpopulate,
 342         .invalidate_caches = vmw_invalidate_caches,
 343         .init_mem_type = vmw_init_mem_type,
 344         .evict_flags = vmw_evict_flags,
 345         .move = NULL,
 346         .verify_access = vmw_verify_access,
 347         .sync_obj_signaled = vmw_sync_obj_signaled,
 348         .sync_obj_wait = vmw_sync_obj_wait,
 349         .sync_obj_flush = vmw_sync_obj_flush,
 350         .sync_obj_unref = vmw_sync_obj_unref,
 351         .sync_obj_ref = vmw_sync_obj_ref,
 352         .move_notify = NULL,
 353         .swap_notify = NULL,
 354         .fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
 355         .io_mem_reserve = &vmw_ttm_io_mem_reserve,
 356         .io_mem_free = &vmw_ttm_io_mem_free,
 357 };