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