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 "ttm/ttm_bo_driver.h"
  30 #include "ttm/ttm_placement.h"
  31
  32 static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM |
  33         TTM_PL_FLAG_CACHED;
  34
  35 static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM |
  36         TTM_PL_FLAG_CACHED |
  37         TTM_PL_FLAG_NO_EVICT;
  38
  39 static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
  40         TTM_PL_FLAG_CACHED;
  41
  42 static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
  43         TTM_PL_FLAG_CACHED;
  44
  45 static uint32_t gmr_ne_placement_flags = VMW_PL_FLAG_GMR |
  46         TTM_PL_FLAG_CACHED |
  47         TTM_PL_FLAG_NO_EVICT;
  48
  49 struct ttm_placement vmw_vram_placement = {
  50         .fpfn = 0,
  51         .lpfn = 0,
  52         .num_placement = 1,
  53         .placement = &vram_placement_flags,
  54         .num_busy_placement = 1,
  55         .busy_placement = &vram_placement_flags
  56 };
  57
  58 static uint32_t vram_gmr_placement_flags[] = {
  59         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
  60         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
  61 };
  62
  63 struct ttm_placement vmw_vram_gmr_placement = {
  64         .fpfn = 0,
  65         .lpfn = 0,
  66         .num_placement = 2,
  67         .placement = vram_gmr_placement_flags,
  68         .num_busy_placement = 1,
  69         .busy_placement = &gmr_placement_flags
  70 };
  71
  72 static uint32_t vram_gmr_ne_placement_flags[] = {
  73         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT,
  74         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
  75 };
  76
  77 struct ttm_placement vmw_vram_gmr_ne_placement = {
  78         .fpfn = 0,
  79         .lpfn = 0,
  80         .num_placement = 2,
  81         .placement = vram_gmr_ne_placement_flags,
  82         .num_busy_placement = 1,
  83         .busy_placement = &gmr_ne_placement_flags
  84 };
  85
  86 struct ttm_placement vmw_vram_sys_placement = {
  87         .fpfn = 0,
  88         .lpfn = 0,
  89         .num_placement = 1,
  90         .placement = &vram_placement_flags,
  91         .num_busy_placement = 1,
  92         .busy_placement = &sys_placement_flags
  93 };
  94
  95 struct ttm_placement vmw_vram_ne_placement = {
  96         .fpfn = 0,
  97         .lpfn = 0,
  98         .num_placement = 1,
  99         .placement = &vram_ne_placement_flags,
 100         .num_busy_placement = 1,
 101         .busy_placement = &vram_ne_placement_flags
 102 };
 103
 104 struct ttm_placement vmw_sys_placement = {
 105         .fpfn = 0,
 106         .lpfn = 0,
 107         .num_placement = 1,
 108         .placement = &sys_placement_flags,
 109         .num_busy_placement = 1,
 110         .busy_placement = &sys_placement_flags
 111 };
 112
 113 static uint32_t evictable_placement_flags[] = {
 114         TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED,
 115         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
 116         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
 117 };
 118
 119 struct ttm_placement vmw_evictable_placement = {
 120         .fpfn = 0,
 121         .lpfn = 0,
 122         .num_placement = 3,
 123         .placement = evictable_placement_flags,
 124         .num_busy_placement = 1,
 125         .busy_placement = &sys_placement_flags
 126 };
 127
 128 struct vmw_ttm_backend {
 129         struct ttm_backend backend;
 130         struct page **pages;
 131         unsigned long num_pages;
 132         struct vmw_private *dev_priv;
 133         int gmr_id;
 134 };
 135
 136 static int vmw_ttm_populate(struct ttm_backend *backend,
 137                             unsigned long num_pages, struct page **pages,
 138                             struct page *dummy_read_page,
 139                             dma_addr_t *dma_addrs)
 140 {
 141         struct vmw_ttm_backend *vmw_be =
 142             container_of(backend, struct vmw_ttm_backend, backend);
 143
 144         vmw_be->pages = pages;
 145         vmw_be->num_pages = num_pages;
 146
 147         return 0;
 148 }
 149
 150 static int vmw_ttm_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
 151 {
 152         struct vmw_ttm_backend *vmw_be =
 153             container_of(backend, struct vmw_ttm_backend, backend);
 154
 155         vmw_be->gmr_id = bo_mem->start;
 156
 157         return vmw_gmr_bind(vmw_be->dev_priv, vmw_be->pages,
 158                             vmw_be->num_pages, vmw_be->gmr_id);
 159 }
 160
 161 static int vmw_ttm_unbind(struct ttm_backend *backend)
 162 {
 163         struct vmw_ttm_backend *vmw_be =
 164             container_of(backend, struct vmw_ttm_backend, backend);
 165
 166         vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 167         return 0;
 168 }
 169
 170 static void vmw_ttm_clear(struct ttm_backend *backend)
 171 {
 172         struct vmw_ttm_backend *vmw_be =
 173                 container_of(backend, struct vmw_ttm_backend, backend);
 174
 175         vmw_be->pages = NULL;
 176         vmw_be->num_pages = 0;
 177 }
 178
 179 static void vmw_ttm_destroy(struct ttm_backend *backend)
 180 {
 181         struct vmw_ttm_backend *vmw_be =
 182             container_of(backend, struct vmw_ttm_backend, backend);
 183
 184         kfree(vmw_be);
 185 }
 186
 187 static struct ttm_backend_func vmw_ttm_func = {
 188         .populate = vmw_ttm_populate,
 189         .clear = vmw_ttm_clear,
 190         .bind = vmw_ttm_bind,
 191         .unbind = vmw_ttm_unbind,
 192         .destroy = vmw_ttm_destroy,
 193 };
 194
 195 struct ttm_backend *vmw_ttm_backend_init(struct ttm_bo_device *bdev)
 196 {
 197         struct vmw_ttm_backend *vmw_be;
 198
 199         vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
 200         if (!vmw_be)
 201                 return NULL;
 202
 203         vmw_be->backend.func = &vmw_ttm_func;
 204         vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
 205
 206         return &vmw_be->backend;
 207 }
 208
 209 int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 210 {
 211         return 0;
 212 }
 213
 214 int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 215                       struct ttm_mem_type_manager *man)
 216 {
 217         switch (type) {
 218         case TTM_PL_SYSTEM:
 219                 /* System memory */
 220
 221                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 222                 man->available_caching = TTM_PL_FLAG_CACHED;
 223                 man->default_caching = TTM_PL_FLAG_CACHED;
 224                 break;
 225         case TTM_PL_VRAM:
 226                 /* "On-card" video ram */
 227                 man->func = &ttm_bo_manager_func;
 228                 man->gpu_offset = 0;
 229                 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
 230                 man->available_caching = TTM_PL_FLAG_CACHED;
 231                 man->default_caching = TTM_PL_FLAG_CACHED;
 232                 break;
 233         case VMW_PL_GMR:
 234                 /*
 235                  * "Guest Memory Regions" is an aperture like feature with
 236                  *  one slot per bo. There is an upper limit of the number of
 237                  *  slots as well as the bo size.
 238                  */
 239                 man->func = &vmw_gmrid_manager_func;
 240                 man->gpu_offset = 0;
 241                 man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
 242                 man->available_caching = TTM_PL_FLAG_CACHED;
 243                 man->default_caching = TTM_PL_FLAG_CACHED;
 244                 break;
 245         default:
 246                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 247                 return -EINVAL;
 248         }
 249         return 0;
 250 }
 251
 252 void vmw_evict_flags(struct ttm_buffer_object *bo,
 253                      struct ttm_placement *placement)
 254 {
 255         *placement = vmw_sys_placement;
 256 }
 257
 258 /**
 259  * FIXME: Proper access checks on buffers.
 260  */
 261
 262 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 263 {
 264         return 0;
 265 }
 266
 267 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 268 {
 269         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 270         struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 271
 272         mem->bus.addr = NULL;
 273         mem->bus.is_iomem = false;
 274         mem->bus.offset = 0;
 275         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 276         mem->bus.base = 0;
 277         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 278                 return -EINVAL;
 279         switch (mem->mem_type) {
 280         case TTM_PL_SYSTEM:
 281         case VMW_PL_GMR:
 282                 return 0;
 283         case TTM_PL_VRAM:
 284                 mem->bus.offset = mem->start << PAGE_SHIFT;
 285                 mem->bus.base = dev_priv->vram_start;
 286                 mem->bus.is_iomem = true;
 287                 break;
 288         default:
 289                 return -EINVAL;
 290         }
 291         return 0;
 292 }
 293
 294 static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 295 {
 296 }
 297
 298 static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
 299 {
 300         return 0;
 301 }
 302
 303 /**
 304  * FIXME: We're using the old vmware polling method to sync.
 305  * Do this with fences instead.
 306  */
 307
 308 static void *vmw_sync_obj_ref(void *sync_obj)
 309 {
 310
 311         return (void *)
 312                 vmw_fence_obj_reference((struct vmw_fence_obj *) sync_obj);
 313 }
 314
 315 static void vmw_sync_obj_unref(void **sync_obj)
 316 {
 317         vmw_fence_obj_unreference((struct vmw_fence_obj **) sync_obj);
 318 }
 319
 320 static int vmw_sync_obj_flush(void *sync_obj, void *sync_arg)
 321 {
 322         vmw_fence_obj_flush((struct vmw_fence_obj *) sync_obj);
 323         return 0;
 324 }
 325
 326 static bool vmw_sync_obj_signaled(void *sync_obj, void *sync_arg)
 327 {
 328         unsigned long flags = (unsigned long) sync_arg;
 329         return  vmw_fence_obj_signaled((struct vmw_fence_obj *) sync_obj,
 330                                        (uint32_t) flags);
 331
 332 }
 333
 334 static int vmw_sync_obj_wait(void *sync_obj, void *sync_arg,
 335                              bool lazy, bool interruptible)
 336 {
 337         unsigned long flags = (unsigned long) sync_arg;
 338
 339         return vmw_fence_obj_wait((struct vmw_fence_obj *) sync_obj,
 340                                   (uint32_t) flags,
 341                                   lazy, interruptible,
 342                                   VMW_FENCE_WAIT_TIMEOUT);
 343 }
 344
 345 struct ttm_bo_driver vmw_bo_driver = {
 346         .create_ttm_backend_entry = vmw_ttm_backend_init,
 347         .invalidate_caches = vmw_invalidate_caches,
 348         .init_mem_type = vmw_init_mem_type,
 349         .evict_flags = vmw_evict_flags,
 350         .move = NULL,
 351         .verify_access = vmw_verify_access,
 352         .sync_obj_signaled = vmw_sync_obj_signaled,
 353         .sync_obj_wait = vmw_sync_obj_wait,
 354         .sync_obj_flush = vmw_sync_obj_flush,
 355         .sync_obj_unref = vmw_sync_obj_unref,
 356         .sync_obj_ref = vmw_sync_obj_ref,
 357         .move_notify = NULL,
 358         .swap_notify = NULL,
 359         .fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
 360         .io_mem_reserve = &vmw_ttm_io_mem_reserve,
 361         .io_mem_free = &vmw_ttm_io_mem_free,
 362 };