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