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 static uint32_t gmr_vram_placement_flags[] = {
  64         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED,
  65         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
  66 };
  67
  68 struct ttm_placement vmw_vram_gmr_placement = {
  69         .fpfn = 0,
  70         .lpfn = 0,
  71         .num_placement = 2,
  72         .placement = vram_gmr_placement_flags,
  73         .num_busy_placement = 1,
  74         .busy_placement = &gmr_placement_flags
  75 };
  76
  77 static uint32_t vram_gmr_ne_placement_flags[] = {
  78         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT,
  79         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
  80 };
  81
  82 struct ttm_placement vmw_vram_gmr_ne_placement = {
  83         .fpfn = 0,
  84         .lpfn = 0,
  85         .num_placement = 2,
  86         .placement = vram_gmr_ne_placement_flags,
  87         .num_busy_placement = 1,
  88         .busy_placement = &gmr_ne_placement_flags
  89 };
  90
  91 struct ttm_placement vmw_vram_sys_placement = {
  92         .fpfn = 0,
  93         .lpfn = 0,
  94         .num_placement = 1,
  95         .placement = &vram_placement_flags,
  96         .num_busy_placement = 1,
  97         .busy_placement = &sys_placement_flags
  98 };
  99
 100 struct ttm_placement vmw_vram_ne_placement = {
 101         .fpfn = 0,
 102         .lpfn = 0,
 103         .num_placement = 1,
 104         .placement = &vram_ne_placement_flags,
 105         .num_busy_placement = 1,
 106         .busy_placement = &vram_ne_placement_flags
 107 };
 108
 109 struct ttm_placement vmw_sys_placement = {
 110         .fpfn = 0,
 111         .lpfn = 0,
 112         .num_placement = 1,
 113         .placement = &sys_placement_flags,
 114         .num_busy_placement = 1,
 115         .busy_placement = &sys_placement_flags
 116 };
 117
 118 static uint32_t evictable_placement_flags[] = {
 119         TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED,
 120         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
 121         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
 122 };
 123
 124 struct ttm_placement vmw_evictable_placement = {
 125         .fpfn = 0,
 126         .lpfn = 0,
 127         .num_placement = 3,
 128         .placement = evictable_placement_flags,
 129         .num_busy_placement = 1,
 130         .busy_placement = &sys_placement_flags
 131 };
 132
 133 struct ttm_placement vmw_srf_placement = {
 134         .fpfn = 0,
 135         .lpfn = 0,
 136         .num_placement = 1,
 137         .num_busy_placement = 2,
 138         .placement = &gmr_placement_flags,
 139         .busy_placement = gmr_vram_placement_flags
 140 };
 141
 142 struct vmw_ttm_backend {
 143         struct ttm_backend backend;
 144         struct page **pages;
 145         unsigned long num_pages;
 146         struct vmw_private *dev_priv;
 147         int gmr_id;
 148 };
 149
 150 static int vmw_ttm_populate(struct ttm_backend *backend,
 151                             unsigned long num_pages, struct page **pages,
 152                             struct page *dummy_read_page,
 153                             dma_addr_t *dma_addrs)
 154 {
 155         struct vmw_ttm_backend *vmw_be =
 156             container_of(backend, struct vmw_ttm_backend, backend);
 157
 158         vmw_be->pages = pages;
 159         vmw_be->num_pages = num_pages;
 160
 161         return 0;
 162 }
 163
 164 static int vmw_ttm_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
 165 {
 166         struct vmw_ttm_backend *vmw_be =
 167             container_of(backend, struct vmw_ttm_backend, backend);
 168
 169         vmw_be->gmr_id = bo_mem->start;
 170
 171         return vmw_gmr_bind(vmw_be->dev_priv, vmw_be->pages,
 172                             vmw_be->num_pages, vmw_be->gmr_id);
 173 }
 174
 175 static int vmw_ttm_unbind(struct ttm_backend *backend)
 176 {
 177         struct vmw_ttm_backend *vmw_be =
 178             container_of(backend, struct vmw_ttm_backend, backend);
 179
 180         vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 181         return 0;
 182 }
 183
 184 static void vmw_ttm_clear(struct ttm_backend *backend)
 185 {
 186         struct vmw_ttm_backend *vmw_be =
 187                 container_of(backend, struct vmw_ttm_backend, backend);
 188
 189         vmw_be->pages = NULL;
 190         vmw_be->num_pages = 0;
 191 }
 192
 193 static void vmw_ttm_destroy(struct ttm_backend *backend)
 194 {
 195         struct vmw_ttm_backend *vmw_be =
 196             container_of(backend, struct vmw_ttm_backend, backend);
 197
 198         kfree(vmw_be);
 199 }
 200
 201 static struct ttm_backend_func vmw_ttm_func = {
 202         .populate = vmw_ttm_populate,
 203         .clear = vmw_ttm_clear,
 204         .bind = vmw_ttm_bind,
 205         .unbind = vmw_ttm_unbind,
 206         .destroy = vmw_ttm_destroy,
 207 };
 208
 209 struct ttm_backend *vmw_ttm_backend_init(struct ttm_bo_device *bdev)
 210 {
 211         struct vmw_ttm_backend *vmw_be;
 212
 213         vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
 214         if (!vmw_be)
 215                 return NULL;
 216
 217         vmw_be->backend.func = &vmw_ttm_func;
 218         vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
 219
 220         return &vmw_be->backend;
 221 }
 222
 223 int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 224 {
 225         return 0;
 226 }
 227
 228 int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 229                       struct ttm_mem_type_manager *man)
 230 {
 231         switch (type) {
 232         case TTM_PL_SYSTEM:
 233                 /* System memory */
 234
 235                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 236                 man->available_caching = TTM_PL_FLAG_CACHED;
 237                 man->default_caching = TTM_PL_FLAG_CACHED;
 238                 break;
 239         case TTM_PL_VRAM:
 240                 /* "On-card" video ram */
 241                 man->func = &ttm_bo_manager_func;
 242                 man->gpu_offset = 0;
 243                 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
 244                 man->available_caching = TTM_PL_FLAG_CACHED;
 245                 man->default_caching = TTM_PL_FLAG_CACHED;
 246                 break;
 247         case VMW_PL_GMR:
 248                 /*
 249                  * "Guest Memory Regions" is an aperture like feature with
 250                  *  one slot per bo. There is an upper limit of the number of
 251                  *  slots as well as the bo size.
 252                  */
 253                 man->func = &vmw_gmrid_manager_func;
 254                 man->gpu_offset = 0;
 255                 man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
 256                 man->available_caching = TTM_PL_FLAG_CACHED;
 257                 man->default_caching = TTM_PL_FLAG_CACHED;
 258                 break;
 259         default:
 260                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 261                 return -EINVAL;
 262         }
 263         return 0;
 264 }
 265
 266 void vmw_evict_flags(struct ttm_buffer_object *bo,
 267                      struct ttm_placement *placement)
 268 {
 269         *placement = vmw_sys_placement;
 270 }
 271
 272 /**
 273  * FIXME: Proper access checks on buffers.
 274  */
 275
 276 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 277 {
 278         return 0;
 279 }
 280
 281 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 282 {
 283         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 284         struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 285
 286         mem->bus.addr = NULL;
 287         mem->bus.is_iomem = false;
 288         mem->bus.offset = 0;
 289         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 290         mem->bus.base = 0;
 291         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 292                 return -EINVAL;
 293         switch (mem->mem_type) {
 294         case TTM_PL_SYSTEM:
 295         case VMW_PL_GMR:
 296                 return 0;
 297         case TTM_PL_VRAM:
 298                 mem->bus.offset = mem->start << PAGE_SHIFT;
 299                 mem->bus.base = dev_priv->vram_start;
 300                 mem->bus.is_iomem = true;
 301                 break;
 302         default:
 303                 return -EINVAL;
 304         }
 305         return 0;
 306 }
 307
 308 static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 309 {
 310 }
 311
 312 static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
 313 {
 314         return 0;
 315 }
 316
 317 /**
 318  * FIXME: We're using the old vmware polling method to sync.
 319  * Do this with fences instead.
 320  */
 321
 322 static void *vmw_sync_obj_ref(void *sync_obj)
 323 {
 324
 325         return (void *)
 326                 vmw_fence_obj_reference((struct vmw_fence_obj *) sync_obj);
 327 }
 328
 329 static void vmw_sync_obj_unref(void **sync_obj)
 330 {
 331         vmw_fence_obj_unreference((struct vmw_fence_obj **) sync_obj);
 332 }
 333
 334 static int vmw_sync_obj_flush(void *sync_obj, void *sync_arg)
 335 {
 336         vmw_fence_obj_flush((struct vmw_fence_obj *) sync_obj);
 337         return 0;
 338 }
 339
 340 static bool vmw_sync_obj_signaled(void *sync_obj, void *sync_arg)
 341 {
 342         unsigned long flags = (unsigned long) sync_arg;
 343         return  vmw_fence_obj_signaled((struct vmw_fence_obj *) sync_obj,
 344                                        (uint32_t) flags);
 345
 346 }
 347
 348 static int vmw_sync_obj_wait(void *sync_obj, void *sync_arg,
 349                              bool lazy, bool interruptible)
 350 {
 351         unsigned long flags = (unsigned long) sync_arg;
 352
 353         return vmw_fence_obj_wait((struct vmw_fence_obj *) sync_obj,
 354                                   (uint32_t) flags,
 355                                   lazy, interruptible,
 356                                   VMW_FENCE_WAIT_TIMEOUT);
 357 }
 358
 359 struct ttm_bo_driver vmw_bo_driver = {
 360         .create_ttm_backend_entry = vmw_ttm_backend_init,
 361         .invalidate_caches = vmw_invalidate_caches,
 362         .init_mem_type = vmw_init_mem_type,
 363         .evict_flags = vmw_evict_flags,
 364         .move = NULL,
 365         .verify_access = vmw_verify_access,
 366         .sync_obj_signaled = vmw_sync_obj_signaled,
 367         .sync_obj_wait = vmw_sync_obj_wait,
 368         .sync_obj_flush = vmw_sync_obj_flush,
 369         .sync_obj_unref = vmw_sync_obj_unref,
 370         .sync_obj_ref = vmw_sync_obj_ref,
 371         .move_notify = NULL,
 372         .swap_notify = NULL,
 373         .fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
 374         .io_mem_reserve = &vmw_ttm_io_mem_reserve,
 375         .io_mem_free = &vmw_ttm_io_mem_free,
 376 };