Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 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" |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 29 | #include <drm/vmwgfx_drm.h> |
| 30 | #include <drm/ttm/ttm_object.h> |
| 31 | #include <drm/ttm/ttm_placement.h> |
| 32 | #include <drm/drmP.h> |
Thomas Hellstrom | 543831c | 2012-11-20 12:19:36 +0000 | [diff] [blame] | 33 | #include "vmwgfx_resource_priv.h" |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 34 | |
| 35 | struct vmw_user_dma_buffer { |
| 36 | struct ttm_base_object base; |
| 37 | struct vmw_dma_buffer dma; |
| 38 | }; |
| 39 | |
| 40 | struct vmw_bo_user_rep { |
| 41 | uint32_t handle; |
| 42 | uint64_t map_handle; |
| 43 | }; |
| 44 | |
| 45 | struct vmw_stream { |
| 46 | struct vmw_resource res; |
| 47 | uint32_t stream_id; |
| 48 | }; |
| 49 | |
| 50 | struct vmw_user_stream { |
| 51 | struct ttm_base_object base; |
| 52 | struct vmw_stream stream; |
| 53 | }; |
| 54 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 55 | |
| 56 | static uint64_t vmw_user_stream_size; |
| 57 | |
| 58 | static const struct vmw_res_func vmw_stream_func = { |
| 59 | .res_type = vmw_res_stream, |
| 60 | .needs_backup = false, |
| 61 | .may_evict = false, |
| 62 | .type_name = "video streams", |
| 63 | .backup_placement = NULL, |
| 64 | .create = NULL, |
| 65 | .destroy = NULL, |
| 66 | .bind = NULL, |
| 67 | .unbind = NULL |
| 68 | }; |
| 69 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 70 | static inline struct vmw_dma_buffer * |
| 71 | vmw_dma_buffer(struct ttm_buffer_object *bo) |
| 72 | { |
| 73 | return container_of(bo, struct vmw_dma_buffer, base); |
| 74 | } |
| 75 | |
| 76 | static inline struct vmw_user_dma_buffer * |
| 77 | vmw_user_dma_buffer(struct ttm_buffer_object *bo) |
| 78 | { |
| 79 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); |
| 80 | return container_of(vmw_bo, struct vmw_user_dma_buffer, dma); |
| 81 | } |
| 82 | |
| 83 | struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) |
| 84 | { |
| 85 | kref_get(&res->kref); |
| 86 | return res; |
| 87 | } |
| 88 | |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 89 | |
| 90 | /** |
| 91 | * vmw_resource_release_id - release a resource id to the id manager. |
| 92 | * |
| 93 | * @res: Pointer to the resource. |
| 94 | * |
| 95 | * Release the resource id to the resource id manager and set it to -1 |
| 96 | */ |
Thomas Hellstrom | 543831c | 2012-11-20 12:19:36 +0000 | [diff] [blame] | 97 | void vmw_resource_release_id(struct vmw_resource *res) |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 98 | { |
| 99 | struct vmw_private *dev_priv = res->dev_priv; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 100 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 101 | |
| 102 | write_lock(&dev_priv->resource_lock); |
| 103 | if (res->id != -1) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 104 | idr_remove(idr, res->id); |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 105 | res->id = -1; |
| 106 | write_unlock(&dev_priv->resource_lock); |
| 107 | } |
| 108 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 109 | static void vmw_resource_release(struct kref *kref) |
| 110 | { |
| 111 | struct vmw_resource *res = |
| 112 | container_of(kref, struct vmw_resource, kref); |
| 113 | struct vmw_private *dev_priv = res->dev_priv; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 114 | int id; |
| 115 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 116 | |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 117 | res->avail = false; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 118 | list_del_init(&res->lru_head); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 119 | write_unlock(&dev_priv->resource_lock); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 120 | if (res->backup) { |
| 121 | struct ttm_buffer_object *bo = &res->backup->base; |
| 122 | |
| 123 | ttm_bo_reserve(bo, false, false, false, 0); |
| 124 | if (!list_empty(&res->mob_head) && |
| 125 | res->func->unbind != NULL) { |
| 126 | struct ttm_validate_buffer val_buf; |
| 127 | |
| 128 | val_buf.bo = bo; |
| 129 | res->func->unbind(res, false, &val_buf); |
| 130 | } |
| 131 | res->backup_dirty = false; |
| 132 | list_del_init(&res->mob_head); |
| 133 | ttm_bo_unreserve(bo); |
| 134 | vmw_dmabuf_unreference(&res->backup); |
| 135 | } |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 136 | |
| 137 | if (likely(res->hw_destroy != NULL)) |
| 138 | res->hw_destroy(res); |
| 139 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 140 | id = res->id; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 141 | if (res->res_free != NULL) |
| 142 | res->res_free(res); |
| 143 | else |
| 144 | kfree(res); |
| 145 | |
| 146 | write_lock(&dev_priv->resource_lock); |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 147 | |
| 148 | if (id != -1) |
| 149 | idr_remove(idr, id); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | void vmw_resource_unreference(struct vmw_resource **p_res) |
| 153 | { |
| 154 | struct vmw_resource *res = *p_res; |
| 155 | struct vmw_private *dev_priv = res->dev_priv; |
| 156 | |
| 157 | *p_res = NULL; |
| 158 | write_lock(&dev_priv->resource_lock); |
| 159 | kref_put(&res->kref, vmw_resource_release); |
| 160 | write_unlock(&dev_priv->resource_lock); |
| 161 | } |
| 162 | |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 163 | |
| 164 | /** |
| 165 | * vmw_resource_alloc_id - release a resource id to the id manager. |
| 166 | * |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 167 | * @res: Pointer to the resource. |
| 168 | * |
| 169 | * Allocate the lowest free resource from the resource manager, and set |
| 170 | * @res->id to that id. Returns 0 on success and -ENOMEM on failure. |
| 171 | */ |
Thomas Hellstrom | 543831c | 2012-11-20 12:19:36 +0000 | [diff] [blame] | 172 | int vmw_resource_alloc_id(struct vmw_resource *res) |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 173 | { |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 174 | struct vmw_private *dev_priv = res->dev_priv; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 175 | int ret; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 176 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 177 | |
| 178 | BUG_ON(res->id != -1); |
| 179 | |
Tejun Heo | cc39a8f | 2013-02-27 17:04:14 -0800 | [diff] [blame] | 180 | idr_preload(GFP_KERNEL); |
| 181 | write_lock(&dev_priv->resource_lock); |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 182 | |
Tejun Heo | cc39a8f | 2013-02-27 17:04:14 -0800 | [diff] [blame] | 183 | ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT); |
| 184 | if (ret >= 0) |
| 185 | res->id = ret; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 186 | |
Tejun Heo | cc39a8f | 2013-02-27 17:04:14 -0800 | [diff] [blame] | 187 | write_unlock(&dev_priv->resource_lock); |
| 188 | idr_preload_end(); |
| 189 | return ret < 0 ? ret : 0; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 190 | } |
| 191 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 192 | /** |
| 193 | * vmw_resource_init - initialize a struct vmw_resource |
| 194 | * |
| 195 | * @dev_priv: Pointer to a device private struct. |
| 196 | * @res: The struct vmw_resource to initialize. |
| 197 | * @obj_type: Resource object type. |
| 198 | * @delay_id: Boolean whether to defer device id allocation until |
| 199 | * the first validation. |
| 200 | * @res_free: Resource destructor. |
| 201 | * @func: Resource function table. |
| 202 | */ |
Thomas Hellstrom | 543831c | 2012-11-20 12:19:36 +0000 | [diff] [blame] | 203 | int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res, |
| 204 | bool delay_id, |
| 205 | void (*res_free) (struct vmw_resource *res), |
| 206 | const struct vmw_res_func *func) |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 207 | { |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 208 | kref_init(&res->kref); |
| 209 | res->hw_destroy = NULL; |
| 210 | res->res_free = res_free; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 211 | res->avail = false; |
| 212 | res->dev_priv = dev_priv; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 213 | res->func = func; |
| 214 | INIT_LIST_HEAD(&res->lru_head); |
| 215 | INIT_LIST_HEAD(&res->mob_head); |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 216 | res->id = -1; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 217 | res->backup = NULL; |
| 218 | res->backup_offset = 0; |
| 219 | res->backup_dirty = false; |
| 220 | res->res_dirty = false; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 221 | if (delay_id) |
| 222 | return 0; |
| 223 | else |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 224 | return vmw_resource_alloc_id(res); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | /** |
| 228 | * vmw_resource_activate |
| 229 | * |
| 230 | * @res: Pointer to the newly created resource |
| 231 | * @hw_destroy: Destroy function. NULL if none. |
| 232 | * |
| 233 | * Activate a resource after the hardware has been made aware of it. |
| 234 | * Set tye destroy function to @destroy. Typically this frees the |
| 235 | * resource and destroys the hardware resources associated with it. |
| 236 | * Activate basically means that the function vmw_resource_lookup will |
| 237 | * find it. |
| 238 | */ |
Thomas Hellstrom | 543831c | 2012-11-20 12:19:36 +0000 | [diff] [blame] | 239 | void vmw_resource_activate(struct vmw_resource *res, |
| 240 | void (*hw_destroy) (struct vmw_resource *)) |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 241 | { |
| 242 | struct vmw_private *dev_priv = res->dev_priv; |
| 243 | |
| 244 | write_lock(&dev_priv->resource_lock); |
| 245 | res->avail = true; |
| 246 | res->hw_destroy = hw_destroy; |
| 247 | write_unlock(&dev_priv->resource_lock); |
| 248 | } |
| 249 | |
| 250 | struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv, |
| 251 | struct idr *idr, int id) |
| 252 | { |
| 253 | struct vmw_resource *res; |
| 254 | |
| 255 | read_lock(&dev_priv->resource_lock); |
| 256 | res = idr_find(idr, id); |
| 257 | if (res && res->avail) |
| 258 | kref_get(&res->kref); |
| 259 | else |
| 260 | res = NULL; |
| 261 | read_unlock(&dev_priv->resource_lock); |
| 262 | |
| 263 | if (unlikely(res == NULL)) |
| 264 | return NULL; |
| 265 | |
| 266 | return res; |
| 267 | } |
| 268 | |
| 269 | /** |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 270 | * vmw_user_resource_lookup_handle - lookup a struct resource from a |
| 271 | * TTM user-space handle and perform basic type checks |
| 272 | * |
| 273 | * @dev_priv: Pointer to a device private struct |
| 274 | * @tfile: Pointer to a struct ttm_object_file identifying the caller |
| 275 | * @handle: The TTM user-space handle |
| 276 | * @converter: Pointer to an object describing the resource type |
| 277 | * @p_res: On successful return the location pointed to will contain |
| 278 | * a pointer to a refcounted struct vmw_resource. |
| 279 | * |
| 280 | * If the handle can't be found or is associated with an incorrect resource |
| 281 | * type, -EINVAL will be returned. |
| 282 | */ |
| 283 | int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv, |
| 284 | struct ttm_object_file *tfile, |
| 285 | uint32_t handle, |
| 286 | const struct vmw_user_resource_conv |
| 287 | *converter, |
| 288 | struct vmw_resource **p_res) |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 289 | { |
Thomas Hellstrom | 7a73ba7 | 2009-12-22 16:53:41 +0100 | [diff] [blame] | 290 | struct ttm_base_object *base; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 291 | struct vmw_resource *res; |
| 292 | int ret = -EINVAL; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 293 | |
Thomas Hellstrom | 7a73ba7 | 2009-12-22 16:53:41 +0100 | [diff] [blame] | 294 | base = ttm_base_object_lookup(tfile, handle); |
| 295 | if (unlikely(base == NULL)) |
| 296 | return -EINVAL; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 297 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 298 | if (unlikely(base->object_type != converter->object_type)) |
| 299 | goto out_bad_resource; |
Thomas Hellstrom | 7a73ba7 | 2009-12-22 16:53:41 +0100 | [diff] [blame] | 300 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 301 | res = converter->base_obj_to_res(base); |
| 302 | |
| 303 | read_lock(&dev_priv->resource_lock); |
| 304 | if (!res->avail || res->res_free != converter->res_free) { |
| 305 | read_unlock(&dev_priv->resource_lock); |
| 306 | goto out_bad_resource; |
| 307 | } |
| 308 | |
| 309 | kref_get(&res->kref); |
| 310 | read_unlock(&dev_priv->resource_lock); |
| 311 | |
| 312 | *p_res = res; |
Thomas Hellstrom | 7a73ba7 | 2009-12-22 16:53:41 +0100 | [diff] [blame] | 313 | ret = 0; |
| 314 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 315 | out_bad_resource: |
Thomas Hellstrom | 7a73ba7 | 2009-12-22 16:53:41 +0100 | [diff] [blame] | 316 | ttm_base_object_unref(&base); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 317 | |
| 318 | return ret; |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * Helper function that looks either a surface or dmabuf. |
| 323 | * |
| 324 | * The pointer this pointed at by out_surf and out_buf needs to be null. |
| 325 | */ |
| 326 | int vmw_user_lookup_handle(struct vmw_private *dev_priv, |
| 327 | struct ttm_object_file *tfile, |
| 328 | uint32_t handle, |
| 329 | struct vmw_surface **out_surf, |
| 330 | struct vmw_dma_buffer **out_buf) |
| 331 | { |
| 332 | struct vmw_resource *res; |
| 333 | int ret; |
| 334 | |
| 335 | BUG_ON(*out_surf || *out_buf); |
| 336 | |
| 337 | ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle, |
| 338 | user_surface_converter, |
| 339 | &res); |
| 340 | if (!ret) { |
| 341 | *out_surf = vmw_res_to_srf(res); |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | *out_surf = NULL; |
| 346 | ret = vmw_user_dmabuf_lookup(tfile, handle, out_buf); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 347 | return ret; |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * Buffer management. |
| 352 | */ |
Thomas Hellstrom | effe110 | 2010-01-13 22:28:39 +0100 | [diff] [blame] | 353 | void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo) |
| 354 | { |
| 355 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); |
Thomas Hellstrom | effe110 | 2010-01-13 22:28:39 +0100 | [diff] [blame] | 356 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 357 | kfree(vmw_bo); |
| 358 | } |
| 359 | |
| 360 | int vmw_dmabuf_init(struct vmw_private *dev_priv, |
| 361 | struct vmw_dma_buffer *vmw_bo, |
| 362 | size_t size, struct ttm_placement *placement, |
| 363 | bool interruptible, |
| 364 | void (*bo_free) (struct ttm_buffer_object *bo)) |
| 365 | { |
| 366 | struct ttm_bo_device *bdev = &dev_priv->bdev; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 367 | size_t acc_size; |
| 368 | int ret; |
| 369 | |
| 370 | BUG_ON(!bo_free); |
| 371 | |
Jerome Glisse | 57de4ba | 2011-11-11 15:42:57 -0500 | [diff] [blame] | 372 | acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct vmw_dma_buffer)); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 373 | memset(vmw_bo, 0, sizeof(*vmw_bo)); |
| 374 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 375 | INIT_LIST_HEAD(&vmw_bo->res_list); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 376 | |
| 377 | ret = ttm_bo_init(bdev, &vmw_bo->base, size, |
| 378 | ttm_bo_type_device, placement, |
Marcin Slusarz | 0b91c4a | 2012-11-06 21:49:51 +0000 | [diff] [blame] | 379 | 0, interruptible, |
Dave Airlie | 129b78b | 2012-04-02 11:46:06 +0100 | [diff] [blame] | 380 | NULL, acc_size, NULL, bo_free); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 381 | return ret; |
| 382 | } |
| 383 | |
| 384 | static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo) |
| 385 | { |
| 386 | struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 387 | |
Thomas Hellstrom | cdad052 | 2012-11-06 11:31:50 +0000 | [diff] [blame] | 388 | ttm_base_object_kfree(vmw_user_bo, base); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | static void vmw_user_dmabuf_release(struct ttm_base_object **p_base) |
| 392 | { |
| 393 | struct vmw_user_dma_buffer *vmw_user_bo; |
| 394 | struct ttm_base_object *base = *p_base; |
| 395 | struct ttm_buffer_object *bo; |
| 396 | |
| 397 | *p_base = NULL; |
| 398 | |
| 399 | if (unlikely(base == NULL)) |
| 400 | return; |
| 401 | |
| 402 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base); |
| 403 | bo = &vmw_user_bo->dma.base; |
| 404 | ttm_bo_unref(&bo); |
| 405 | } |
| 406 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 407 | /** |
| 408 | * vmw_user_dmabuf_alloc - Allocate a user dma buffer |
| 409 | * |
| 410 | * @dev_priv: Pointer to a struct device private. |
| 411 | * @tfile: Pointer to a struct ttm_object_file on which to register the user |
| 412 | * object. |
| 413 | * @size: Size of the dma buffer. |
| 414 | * @shareable: Boolean whether the buffer is shareable with other open files. |
| 415 | * @handle: Pointer to where the handle value should be assigned. |
| 416 | * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer |
| 417 | * should be assigned. |
| 418 | */ |
| 419 | int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv, |
| 420 | struct ttm_object_file *tfile, |
| 421 | uint32_t size, |
| 422 | bool shareable, |
| 423 | uint32_t *handle, |
| 424 | struct vmw_dma_buffer **p_dma_buf) |
| 425 | { |
| 426 | struct vmw_user_dma_buffer *user_bo; |
| 427 | struct ttm_buffer_object *tmp; |
| 428 | int ret; |
| 429 | |
| 430 | user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL); |
| 431 | if (unlikely(user_bo == NULL)) { |
| 432 | DRM_ERROR("Failed to allocate a buffer.\n"); |
| 433 | return -ENOMEM; |
| 434 | } |
| 435 | |
| 436 | ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size, |
| 437 | &vmw_vram_sys_placement, true, |
| 438 | &vmw_user_dmabuf_destroy); |
| 439 | if (unlikely(ret != 0)) |
| 440 | return ret; |
| 441 | |
| 442 | tmp = ttm_bo_reference(&user_bo->dma.base); |
| 443 | ret = ttm_base_object_init(tfile, |
| 444 | &user_bo->base, |
| 445 | shareable, |
| 446 | ttm_buffer_type, |
| 447 | &vmw_user_dmabuf_release, NULL); |
| 448 | if (unlikely(ret != 0)) { |
| 449 | ttm_bo_unref(&tmp); |
| 450 | goto out_no_base_object; |
| 451 | } |
| 452 | |
| 453 | *p_dma_buf = &user_bo->dma; |
| 454 | *handle = user_bo->base.hash.key; |
| 455 | |
| 456 | out_no_base_object: |
| 457 | return ret; |
| 458 | } |
| 459 | |
Thomas Hellstrom | d08a9b9 | 2012-11-21 16:04:18 +0100 | [diff] [blame] | 460 | /** |
| 461 | * vmw_user_dmabuf_verify_access - verify access permissions on this |
| 462 | * buffer object. |
| 463 | * |
| 464 | * @bo: Pointer to the buffer object being accessed |
| 465 | * @tfile: Identifying the caller. |
| 466 | */ |
| 467 | int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo, |
| 468 | struct ttm_object_file *tfile) |
| 469 | { |
| 470 | struct vmw_user_dma_buffer *vmw_user_bo; |
| 471 | |
| 472 | if (unlikely(bo->destroy != vmw_user_dmabuf_destroy)) |
| 473 | return -EPERM; |
| 474 | |
| 475 | vmw_user_bo = vmw_user_dma_buffer(bo); |
| 476 | return (vmw_user_bo->base.tfile == tfile || |
| 477 | vmw_user_bo->base.shareable) ? 0 : -EPERM; |
| 478 | } |
| 479 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 480 | int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data, |
| 481 | struct drm_file *file_priv) |
| 482 | { |
| 483 | struct vmw_private *dev_priv = vmw_priv(dev); |
| 484 | union drm_vmw_alloc_dmabuf_arg *arg = |
| 485 | (union drm_vmw_alloc_dmabuf_arg *)data; |
| 486 | struct drm_vmw_alloc_dmabuf_req *req = &arg->req; |
| 487 | struct drm_vmw_dmabuf_rep *rep = &arg->rep; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 488 | struct vmw_dma_buffer *dma_buf; |
| 489 | uint32_t handle; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 490 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
| 491 | int ret; |
| 492 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 493 | ret = ttm_read_lock(&vmaster->lock, true); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 494 | if (unlikely(ret != 0)) |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 495 | return ret; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 496 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 497 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
| 498 | req->size, false, &handle, &dma_buf); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 499 | if (unlikely(ret != 0)) |
Thomas Hellstrom | 2f5993c | 2010-11-17 13:24:48 +0100 | [diff] [blame] | 500 | goto out_no_dmabuf; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 501 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 502 | rep->handle = handle; |
| 503 | rep->map_handle = dma_buf->base.addr_space_offset; |
| 504 | rep->cur_gmr_id = handle; |
| 505 | rep->cur_gmr_offset = 0; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 506 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 507 | vmw_dmabuf_unreference(&dma_buf); |
| 508 | |
Thomas Hellstrom | 2f5993c | 2010-11-17 13:24:48 +0100 | [diff] [blame] | 509 | out_no_dmabuf: |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 510 | ttm_read_unlock(&vmaster->lock); |
| 511 | |
Thomas Hellstrom | 2f5993c | 2010-11-17 13:24:48 +0100 | [diff] [blame] | 512 | return ret; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data, |
| 516 | struct drm_file *file_priv) |
| 517 | { |
| 518 | struct drm_vmw_unref_dmabuf_arg *arg = |
| 519 | (struct drm_vmw_unref_dmabuf_arg *)data; |
| 520 | |
| 521 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, |
| 522 | arg->handle, |
| 523 | TTM_REF_USAGE); |
| 524 | } |
| 525 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 526 | int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile, |
| 527 | uint32_t handle, struct vmw_dma_buffer **out) |
| 528 | { |
| 529 | struct vmw_user_dma_buffer *vmw_user_bo; |
| 530 | struct ttm_base_object *base; |
| 531 | |
| 532 | base = ttm_base_object_lookup(tfile, handle); |
| 533 | if (unlikely(base == NULL)) { |
| 534 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", |
| 535 | (unsigned long)handle); |
| 536 | return -ESRCH; |
| 537 | } |
| 538 | |
| 539 | if (unlikely(base->object_type != ttm_buffer_type)) { |
| 540 | ttm_base_object_unref(&base); |
| 541 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", |
| 542 | (unsigned long)handle); |
| 543 | return -EINVAL; |
| 544 | } |
| 545 | |
| 546 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base); |
| 547 | (void)ttm_bo_reference(&vmw_user_bo->dma.base); |
| 548 | ttm_base_object_unref(&base); |
| 549 | *out = &vmw_user_bo->dma; |
| 550 | |
| 551 | return 0; |
| 552 | } |
| 553 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 554 | int vmw_user_dmabuf_reference(struct ttm_object_file *tfile, |
| 555 | struct vmw_dma_buffer *dma_buf) |
| 556 | { |
| 557 | struct vmw_user_dma_buffer *user_bo; |
| 558 | |
| 559 | if (dma_buf->base.destroy != vmw_user_dmabuf_destroy) |
| 560 | return -EINVAL; |
| 561 | |
| 562 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma); |
| 563 | return ttm_ref_object_add(tfile, &user_bo->base, TTM_REF_USAGE, NULL); |
| 564 | } |
| 565 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 566 | /* |
Uwe Kleine-König | 65155b3 | 2010-06-11 12:17:01 +0200 | [diff] [blame] | 567 | * Stream management |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 568 | */ |
| 569 | |
| 570 | static void vmw_stream_destroy(struct vmw_resource *res) |
| 571 | { |
| 572 | struct vmw_private *dev_priv = res->dev_priv; |
| 573 | struct vmw_stream *stream; |
| 574 | int ret; |
| 575 | |
| 576 | DRM_INFO("%s: unref\n", __func__); |
| 577 | stream = container_of(res, struct vmw_stream, res); |
| 578 | |
| 579 | ret = vmw_overlay_unref(dev_priv, stream->stream_id); |
| 580 | WARN_ON(ret != 0); |
| 581 | } |
| 582 | |
| 583 | static int vmw_stream_init(struct vmw_private *dev_priv, |
| 584 | struct vmw_stream *stream, |
| 585 | void (*res_free) (struct vmw_resource *res)) |
| 586 | { |
| 587 | struct vmw_resource *res = &stream->res; |
| 588 | int ret; |
| 589 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 590 | ret = vmw_resource_init(dev_priv, res, false, res_free, |
| 591 | &vmw_stream_func); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 592 | |
| 593 | if (unlikely(ret != 0)) { |
| 594 | if (res_free == NULL) |
| 595 | kfree(stream); |
| 596 | else |
| 597 | res_free(&stream->res); |
| 598 | return ret; |
| 599 | } |
| 600 | |
| 601 | ret = vmw_overlay_claim(dev_priv, &stream->stream_id); |
| 602 | if (ret) { |
| 603 | vmw_resource_unreference(&res); |
| 604 | return ret; |
| 605 | } |
| 606 | |
| 607 | DRM_INFO("%s: claimed\n", __func__); |
| 608 | |
| 609 | vmw_resource_activate(&stream->res, vmw_stream_destroy); |
| 610 | return 0; |
| 611 | } |
| 612 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 613 | static void vmw_user_stream_free(struct vmw_resource *res) |
| 614 | { |
| 615 | struct vmw_user_stream *stream = |
| 616 | container_of(res, struct vmw_user_stream, stream.res); |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 617 | struct vmw_private *dev_priv = res->dev_priv; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 618 | |
Thomas Hellstrom | cdad052 | 2012-11-06 11:31:50 +0000 | [diff] [blame] | 619 | ttm_base_object_kfree(stream, base); |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 620 | ttm_mem_global_free(vmw_mem_glob(dev_priv), |
| 621 | vmw_user_stream_size); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | /** |
| 625 | * This function is called when user space has no more references on the |
| 626 | * base object. It releases the base-object's reference on the resource object. |
| 627 | */ |
| 628 | |
| 629 | static void vmw_user_stream_base_release(struct ttm_base_object **p_base) |
| 630 | { |
| 631 | struct ttm_base_object *base = *p_base; |
| 632 | struct vmw_user_stream *stream = |
| 633 | container_of(base, struct vmw_user_stream, base); |
| 634 | struct vmw_resource *res = &stream->stream.res; |
| 635 | |
| 636 | *p_base = NULL; |
| 637 | vmw_resource_unreference(&res); |
| 638 | } |
| 639 | |
| 640 | int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, |
| 641 | struct drm_file *file_priv) |
| 642 | { |
| 643 | struct vmw_private *dev_priv = vmw_priv(dev); |
| 644 | struct vmw_resource *res; |
| 645 | struct vmw_user_stream *stream; |
| 646 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; |
| 647 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 648 | struct idr *idr = &dev_priv->res_idr[vmw_res_stream]; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 649 | int ret = 0; |
| 650 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 651 | |
| 652 | res = vmw_resource_lookup(dev_priv, idr, arg->stream_id); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 653 | if (unlikely(res == NULL)) |
| 654 | return -EINVAL; |
| 655 | |
| 656 | if (res->res_free != &vmw_user_stream_free) { |
| 657 | ret = -EINVAL; |
| 658 | goto out; |
| 659 | } |
| 660 | |
| 661 | stream = container_of(res, struct vmw_user_stream, stream.res); |
| 662 | if (stream->base.tfile != tfile) { |
| 663 | ret = -EINVAL; |
| 664 | goto out; |
| 665 | } |
| 666 | |
| 667 | ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE); |
| 668 | out: |
| 669 | vmw_resource_unreference(&res); |
| 670 | return ret; |
| 671 | } |
| 672 | |
| 673 | int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, |
| 674 | struct drm_file *file_priv) |
| 675 | { |
| 676 | struct vmw_private *dev_priv = vmw_priv(dev); |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 677 | struct vmw_user_stream *stream; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 678 | struct vmw_resource *res; |
| 679 | struct vmw_resource *tmp; |
| 680 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; |
| 681 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 682 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 683 | int ret; |
| 684 | |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 685 | /* |
| 686 | * Approximate idr memory usage with 128 bytes. It will be limited |
| 687 | * by maximum number_of streams anyway? |
| 688 | */ |
| 689 | |
| 690 | if (unlikely(vmw_user_stream_size == 0)) |
| 691 | vmw_user_stream_size = ttm_round_pot(sizeof(*stream)) + 128; |
| 692 | |
| 693 | ret = ttm_read_lock(&vmaster->lock, true); |
| 694 | if (unlikely(ret != 0)) |
| 695 | return ret; |
| 696 | |
| 697 | ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), |
| 698 | vmw_user_stream_size, |
| 699 | false, true); |
| 700 | if (unlikely(ret != 0)) { |
| 701 | if (ret != -ERESTARTSYS) |
| 702 | DRM_ERROR("Out of graphics memory for stream" |
| 703 | " creation.\n"); |
| 704 | goto out_unlock; |
| 705 | } |
| 706 | |
| 707 | |
| 708 | stream = kmalloc(sizeof(*stream), GFP_KERNEL); |
| 709 | if (unlikely(stream == NULL)) { |
| 710 | ttm_mem_global_free(vmw_mem_glob(dev_priv), |
| 711 | vmw_user_stream_size); |
| 712 | ret = -ENOMEM; |
| 713 | goto out_unlock; |
| 714 | } |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 715 | |
| 716 | res = &stream->stream.res; |
| 717 | stream->base.shareable = false; |
| 718 | stream->base.tfile = NULL; |
| 719 | |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 720 | /* |
| 721 | * From here on, the destructor takes over resource freeing. |
| 722 | */ |
| 723 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 724 | ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free); |
| 725 | if (unlikely(ret != 0)) |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 726 | goto out_unlock; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 727 | |
| 728 | tmp = vmw_resource_reference(res); |
| 729 | ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM, |
| 730 | &vmw_user_stream_base_release, NULL); |
| 731 | |
| 732 | if (unlikely(ret != 0)) { |
| 733 | vmw_resource_unreference(&tmp); |
| 734 | goto out_err; |
| 735 | } |
| 736 | |
| 737 | arg->stream_id = res->id; |
| 738 | out_err: |
| 739 | vmw_resource_unreference(&res); |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 740 | out_unlock: |
| 741 | ttm_read_unlock(&vmaster->lock); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 742 | return ret; |
| 743 | } |
| 744 | |
| 745 | int vmw_user_stream_lookup(struct vmw_private *dev_priv, |
| 746 | struct ttm_object_file *tfile, |
| 747 | uint32_t *inout_id, struct vmw_resource **out) |
| 748 | { |
| 749 | struct vmw_user_stream *stream; |
| 750 | struct vmw_resource *res; |
| 751 | int ret; |
| 752 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 753 | res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream], |
| 754 | *inout_id); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 755 | if (unlikely(res == NULL)) |
| 756 | return -EINVAL; |
| 757 | |
| 758 | if (res->res_free != &vmw_user_stream_free) { |
| 759 | ret = -EINVAL; |
| 760 | goto err_ref; |
| 761 | } |
| 762 | |
| 763 | stream = container_of(res, struct vmw_user_stream, stream.res); |
| 764 | if (stream->base.tfile != tfile) { |
| 765 | ret = -EPERM; |
| 766 | goto err_ref; |
| 767 | } |
| 768 | |
| 769 | *inout_id = stream->stream.stream_id; |
| 770 | *out = res; |
| 771 | return 0; |
| 772 | err_ref: |
| 773 | vmw_resource_unreference(&res); |
| 774 | return ret; |
| 775 | } |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 776 | |
| 777 | |
| 778 | int vmw_dumb_create(struct drm_file *file_priv, |
| 779 | struct drm_device *dev, |
| 780 | struct drm_mode_create_dumb *args) |
| 781 | { |
| 782 | struct vmw_private *dev_priv = vmw_priv(dev); |
| 783 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
| 784 | struct vmw_user_dma_buffer *vmw_user_bo; |
| 785 | struct ttm_buffer_object *tmp; |
| 786 | int ret; |
| 787 | |
| 788 | args->pitch = args->width * ((args->bpp + 7) / 8); |
| 789 | args->size = args->pitch * args->height; |
| 790 | |
| 791 | vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL); |
| 792 | if (vmw_user_bo == NULL) |
| 793 | return -ENOMEM; |
| 794 | |
| 795 | ret = ttm_read_lock(&vmaster->lock, true); |
| 796 | if (ret != 0) { |
| 797 | kfree(vmw_user_bo); |
| 798 | return ret; |
| 799 | } |
| 800 | |
| 801 | ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, args->size, |
| 802 | &vmw_vram_sys_placement, true, |
| 803 | &vmw_user_dmabuf_destroy); |
| 804 | if (ret != 0) |
| 805 | goto out_no_dmabuf; |
| 806 | |
| 807 | tmp = ttm_bo_reference(&vmw_user_bo->dma.base); |
| 808 | ret = ttm_base_object_init(vmw_fpriv(file_priv)->tfile, |
| 809 | &vmw_user_bo->base, |
| 810 | false, |
| 811 | ttm_buffer_type, |
| 812 | &vmw_user_dmabuf_release, NULL); |
| 813 | if (unlikely(ret != 0)) |
| 814 | goto out_no_base_object; |
| 815 | |
| 816 | args->handle = vmw_user_bo->base.hash.key; |
| 817 | |
| 818 | out_no_base_object: |
| 819 | ttm_bo_unref(&tmp); |
| 820 | out_no_dmabuf: |
| 821 | ttm_read_unlock(&vmaster->lock); |
| 822 | return ret; |
| 823 | } |
| 824 | |
| 825 | int vmw_dumb_map_offset(struct drm_file *file_priv, |
| 826 | struct drm_device *dev, uint32_t handle, |
| 827 | uint64_t *offset) |
| 828 | { |
| 829 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
| 830 | struct vmw_dma_buffer *out_buf; |
| 831 | int ret; |
| 832 | |
| 833 | ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf); |
| 834 | if (ret != 0) |
| 835 | return -EINVAL; |
| 836 | |
| 837 | *offset = out_buf->base.addr_space_offset; |
| 838 | vmw_dmabuf_unreference(&out_buf); |
| 839 | return 0; |
| 840 | } |
| 841 | |
| 842 | int vmw_dumb_destroy(struct drm_file *file_priv, |
| 843 | struct drm_device *dev, |
| 844 | uint32_t handle) |
| 845 | { |
| 846 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, |
| 847 | handle, TTM_REF_USAGE); |
| 848 | } |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 849 | |
| 850 | /** |
| 851 | * vmw_resource_buf_alloc - Allocate a backup buffer for a resource. |
| 852 | * |
| 853 | * @res: The resource for which to allocate a backup buffer. |
| 854 | * @interruptible: Whether any sleeps during allocation should be |
| 855 | * performed while interruptible. |
| 856 | */ |
| 857 | static int vmw_resource_buf_alloc(struct vmw_resource *res, |
| 858 | bool interruptible) |
| 859 | { |
| 860 | unsigned long size = |
| 861 | (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK; |
| 862 | struct vmw_dma_buffer *backup; |
| 863 | int ret; |
| 864 | |
| 865 | if (likely(res->backup)) { |
| 866 | BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size); |
| 867 | return 0; |
| 868 | } |
| 869 | |
| 870 | backup = kzalloc(sizeof(*backup), GFP_KERNEL); |
| 871 | if (unlikely(backup == NULL)) |
| 872 | return -ENOMEM; |
| 873 | |
| 874 | ret = vmw_dmabuf_init(res->dev_priv, backup, res->backup_size, |
| 875 | res->func->backup_placement, |
| 876 | interruptible, |
| 877 | &vmw_dmabuf_bo_free); |
| 878 | if (unlikely(ret != 0)) |
| 879 | goto out_no_dmabuf; |
| 880 | |
| 881 | res->backup = backup; |
| 882 | |
| 883 | out_no_dmabuf: |
| 884 | return ret; |
| 885 | } |
| 886 | |
| 887 | /** |
| 888 | * vmw_resource_do_validate - Make a resource up-to-date and visible |
| 889 | * to the device. |
| 890 | * |
| 891 | * @res: The resource to make visible to the device. |
| 892 | * @val_buf: Information about a buffer possibly |
| 893 | * containing backup data if a bind operation is needed. |
| 894 | * |
| 895 | * On hardware resource shortage, this function returns -EBUSY and |
| 896 | * should be retried once resources have been freed up. |
| 897 | */ |
| 898 | static int vmw_resource_do_validate(struct vmw_resource *res, |
| 899 | struct ttm_validate_buffer *val_buf) |
| 900 | { |
| 901 | int ret = 0; |
| 902 | const struct vmw_res_func *func = res->func; |
| 903 | |
| 904 | if (unlikely(res->id == -1)) { |
| 905 | ret = func->create(res); |
| 906 | if (unlikely(ret != 0)) |
| 907 | return ret; |
| 908 | } |
| 909 | |
| 910 | if (func->bind && |
| 911 | ((func->needs_backup && list_empty(&res->mob_head) && |
| 912 | val_buf->bo != NULL) || |
| 913 | (!func->needs_backup && val_buf->bo != NULL))) { |
| 914 | ret = func->bind(res, val_buf); |
| 915 | if (unlikely(ret != 0)) |
| 916 | goto out_bind_failed; |
| 917 | if (func->needs_backup) |
| 918 | list_add_tail(&res->mob_head, &res->backup->res_list); |
| 919 | } |
| 920 | |
| 921 | /* |
| 922 | * Only do this on write operations, and move to |
| 923 | * vmw_resource_unreserve if it can be called after |
| 924 | * backup buffers have been unreserved. Otherwise |
| 925 | * sort out locking. |
| 926 | */ |
| 927 | res->res_dirty = true; |
| 928 | |
| 929 | return 0; |
| 930 | |
| 931 | out_bind_failed: |
| 932 | func->destroy(res); |
| 933 | |
| 934 | return ret; |
| 935 | } |
| 936 | |
| 937 | /** |
| 938 | * vmw_resource_unreserve - Unreserve a resource previously reserved for |
| 939 | * command submission. |
| 940 | * |
| 941 | * @res: Pointer to the struct vmw_resource to unreserve. |
| 942 | * @new_backup: Pointer to new backup buffer if command submission |
| 943 | * switched. |
| 944 | * @new_backup_offset: New backup offset if @new_backup is !NULL. |
| 945 | * |
| 946 | * Currently unreserving a resource means putting it back on the device's |
| 947 | * resource lru list, so that it can be evicted if necessary. |
| 948 | */ |
| 949 | void vmw_resource_unreserve(struct vmw_resource *res, |
| 950 | struct vmw_dma_buffer *new_backup, |
| 951 | unsigned long new_backup_offset) |
| 952 | { |
| 953 | struct vmw_private *dev_priv = res->dev_priv; |
| 954 | |
| 955 | if (!list_empty(&res->lru_head)) |
| 956 | return; |
| 957 | |
| 958 | if (new_backup && new_backup != res->backup) { |
| 959 | |
| 960 | if (res->backup) { |
Maarten Lankhorst | 42f6e3d | 2013-01-15 14:53:18 +0100 | [diff] [blame] | 961 | BUG_ON(!ttm_bo_is_reserved(&res->backup->base)); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 962 | list_del_init(&res->mob_head); |
| 963 | vmw_dmabuf_unreference(&res->backup); |
| 964 | } |
| 965 | |
| 966 | res->backup = vmw_dmabuf_reference(new_backup); |
Maarten Lankhorst | 42f6e3d | 2013-01-15 14:53:18 +0100 | [diff] [blame] | 967 | BUG_ON(!ttm_bo_is_reserved(&new_backup->base)); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 968 | list_add_tail(&res->mob_head, &new_backup->res_list); |
| 969 | } |
| 970 | if (new_backup) |
| 971 | res->backup_offset = new_backup_offset; |
| 972 | |
| 973 | if (!res->func->may_evict) |
| 974 | return; |
| 975 | |
| 976 | write_lock(&dev_priv->resource_lock); |
| 977 | list_add_tail(&res->lru_head, |
| 978 | &res->dev_priv->res_lru[res->func->res_type]); |
| 979 | write_unlock(&dev_priv->resource_lock); |
| 980 | } |
| 981 | |
| 982 | /** |
| 983 | * vmw_resource_check_buffer - Check whether a backup buffer is needed |
| 984 | * for a resource and in that case, allocate |
| 985 | * one, reserve and validate it. |
| 986 | * |
| 987 | * @res: The resource for which to allocate a backup buffer. |
| 988 | * @interruptible: Whether any sleeps during allocation should be |
| 989 | * performed while interruptible. |
| 990 | * @val_buf: On successful return contains data about the |
| 991 | * reserved and validated backup buffer. |
| 992 | */ |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame^] | 993 | static int |
| 994 | vmw_resource_check_buffer(struct vmw_resource *res, |
| 995 | struct ww_acquire_ctx *ticket, |
| 996 | bool interruptible, |
| 997 | struct ttm_validate_buffer *val_buf) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 998 | { |
| 999 | struct list_head val_list; |
| 1000 | bool backup_dirty = false; |
| 1001 | int ret; |
| 1002 | |
| 1003 | if (unlikely(res->backup == NULL)) { |
| 1004 | ret = vmw_resource_buf_alloc(res, interruptible); |
| 1005 | if (unlikely(ret != 0)) |
| 1006 | return ret; |
| 1007 | } |
| 1008 | |
| 1009 | INIT_LIST_HEAD(&val_list); |
| 1010 | val_buf->bo = ttm_bo_reference(&res->backup->base); |
| 1011 | list_add_tail(&val_buf->head, &val_list); |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame^] | 1012 | ret = ttm_eu_reserve_buffers(ticket, &val_list); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1013 | if (unlikely(ret != 0)) |
| 1014 | goto out_no_reserve; |
| 1015 | |
| 1016 | if (res->func->needs_backup && list_empty(&res->mob_head)) |
| 1017 | return 0; |
| 1018 | |
| 1019 | backup_dirty = res->backup_dirty; |
| 1020 | ret = ttm_bo_validate(&res->backup->base, |
| 1021 | res->func->backup_placement, |
Maarten Lankhorst | 97a875c | 2012-11-28 11:25:44 +0000 | [diff] [blame] | 1022 | true, false); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1023 | |
| 1024 | if (unlikely(ret != 0)) |
| 1025 | goto out_no_validate; |
| 1026 | |
| 1027 | return 0; |
| 1028 | |
| 1029 | out_no_validate: |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame^] | 1030 | ttm_eu_backoff_reservation(ticket, &val_list); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1031 | out_no_reserve: |
| 1032 | ttm_bo_unref(&val_buf->bo); |
| 1033 | if (backup_dirty) |
| 1034 | vmw_dmabuf_unreference(&res->backup); |
| 1035 | |
| 1036 | return ret; |
| 1037 | } |
| 1038 | |
| 1039 | /** |
| 1040 | * vmw_resource_reserve - Reserve a resource for command submission |
| 1041 | * |
| 1042 | * @res: The resource to reserve. |
| 1043 | * |
| 1044 | * This function takes the resource off the LRU list and make sure |
| 1045 | * a backup buffer is present for guest-backed resources. However, |
| 1046 | * the buffer may not be bound to the resource at this point. |
| 1047 | * |
| 1048 | */ |
| 1049 | int vmw_resource_reserve(struct vmw_resource *res, bool no_backup) |
| 1050 | { |
| 1051 | struct vmw_private *dev_priv = res->dev_priv; |
| 1052 | int ret; |
| 1053 | |
| 1054 | write_lock(&dev_priv->resource_lock); |
| 1055 | list_del_init(&res->lru_head); |
| 1056 | write_unlock(&dev_priv->resource_lock); |
| 1057 | |
| 1058 | if (res->func->needs_backup && res->backup == NULL && |
| 1059 | !no_backup) { |
| 1060 | ret = vmw_resource_buf_alloc(res, true); |
| 1061 | if (unlikely(ret != 0)) |
| 1062 | return ret; |
| 1063 | } |
| 1064 | |
| 1065 | return 0; |
| 1066 | } |
| 1067 | |
| 1068 | /** |
| 1069 | * vmw_resource_backoff_reservation - Unreserve and unreference a |
| 1070 | * backup buffer |
| 1071 | *. |
| 1072 | * @val_buf: Backup buffer information. |
| 1073 | */ |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame^] | 1074 | static void |
| 1075 | vmw_resource_backoff_reservation(struct ww_acquire_ctx *ticket, |
| 1076 | struct ttm_validate_buffer *val_buf) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1077 | { |
| 1078 | struct list_head val_list; |
| 1079 | |
| 1080 | if (likely(val_buf->bo == NULL)) |
| 1081 | return; |
| 1082 | |
| 1083 | INIT_LIST_HEAD(&val_list); |
| 1084 | list_add_tail(&val_buf->head, &val_list); |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame^] | 1085 | ttm_eu_backoff_reservation(ticket, &val_list); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1086 | ttm_bo_unref(&val_buf->bo); |
| 1087 | } |
| 1088 | |
| 1089 | /** |
| 1090 | * vmw_resource_do_evict - Evict a resource, and transfer its data |
| 1091 | * to a backup buffer. |
| 1092 | * |
| 1093 | * @res: The resource to evict. |
| 1094 | */ |
| 1095 | int vmw_resource_do_evict(struct vmw_resource *res) |
| 1096 | { |
| 1097 | struct ttm_validate_buffer val_buf; |
| 1098 | const struct vmw_res_func *func = res->func; |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame^] | 1099 | struct ww_acquire_ctx ticket; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1100 | int ret; |
| 1101 | |
| 1102 | BUG_ON(!func->may_evict); |
| 1103 | |
| 1104 | val_buf.bo = NULL; |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame^] | 1105 | ret = vmw_resource_check_buffer(res, &ticket, true, &val_buf); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1106 | if (unlikely(ret != 0)) |
| 1107 | return ret; |
| 1108 | |
| 1109 | if (unlikely(func->unbind != NULL && |
| 1110 | (!func->needs_backup || !list_empty(&res->mob_head)))) { |
| 1111 | ret = func->unbind(res, res->res_dirty, &val_buf); |
| 1112 | if (unlikely(ret != 0)) |
| 1113 | goto out_no_unbind; |
| 1114 | list_del_init(&res->mob_head); |
| 1115 | } |
| 1116 | ret = func->destroy(res); |
| 1117 | res->backup_dirty = true; |
| 1118 | res->res_dirty = false; |
| 1119 | out_no_unbind: |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame^] | 1120 | vmw_resource_backoff_reservation(&ticket, &val_buf); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1121 | |
| 1122 | return ret; |
| 1123 | } |
| 1124 | |
| 1125 | |
| 1126 | /** |
| 1127 | * vmw_resource_validate - Make a resource up-to-date and visible |
| 1128 | * to the device. |
| 1129 | * |
| 1130 | * @res: The resource to make visible to the device. |
| 1131 | * |
| 1132 | * On succesful return, any backup DMA buffer pointed to by @res->backup will |
| 1133 | * be reserved and validated. |
| 1134 | * On hardware resource shortage, this function will repeatedly evict |
| 1135 | * resources of the same type until the validation succeeds. |
| 1136 | */ |
| 1137 | int vmw_resource_validate(struct vmw_resource *res) |
| 1138 | { |
| 1139 | int ret; |
| 1140 | struct vmw_resource *evict_res; |
| 1141 | struct vmw_private *dev_priv = res->dev_priv; |
| 1142 | struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type]; |
| 1143 | struct ttm_validate_buffer val_buf; |
| 1144 | |
| 1145 | if (likely(!res->func->may_evict)) |
| 1146 | return 0; |
| 1147 | |
| 1148 | val_buf.bo = NULL; |
| 1149 | if (res->backup) |
| 1150 | val_buf.bo = &res->backup->base; |
| 1151 | do { |
| 1152 | ret = vmw_resource_do_validate(res, &val_buf); |
| 1153 | if (likely(ret != -EBUSY)) |
| 1154 | break; |
| 1155 | |
| 1156 | write_lock(&dev_priv->resource_lock); |
| 1157 | if (list_empty(lru_list) || !res->func->may_evict) { |
| 1158 | DRM_ERROR("Out of device device id entries " |
| 1159 | "for %s.\n", res->func->type_name); |
| 1160 | ret = -EBUSY; |
| 1161 | write_unlock(&dev_priv->resource_lock); |
| 1162 | break; |
| 1163 | } |
| 1164 | |
| 1165 | evict_res = vmw_resource_reference |
| 1166 | (list_first_entry(lru_list, struct vmw_resource, |
| 1167 | lru_head)); |
| 1168 | list_del_init(&evict_res->lru_head); |
| 1169 | |
| 1170 | write_unlock(&dev_priv->resource_lock); |
| 1171 | vmw_resource_do_evict(evict_res); |
| 1172 | vmw_resource_unreference(&evict_res); |
| 1173 | } while (1); |
| 1174 | |
| 1175 | if (unlikely(ret != 0)) |
| 1176 | goto out_no_validate; |
| 1177 | else if (!res->func->needs_backup && res->backup) { |
| 1178 | list_del_init(&res->mob_head); |
| 1179 | vmw_dmabuf_unreference(&res->backup); |
| 1180 | } |
| 1181 | |
| 1182 | return 0; |
| 1183 | |
| 1184 | out_no_validate: |
| 1185 | return ret; |
| 1186 | } |
| 1187 | |
| 1188 | /** |
| 1189 | * vmw_fence_single_bo - Utility function to fence a single TTM buffer |
| 1190 | * object without unreserving it. |
| 1191 | * |
| 1192 | * @bo: Pointer to the struct ttm_buffer_object to fence. |
| 1193 | * @fence: Pointer to the fence. If NULL, this function will |
| 1194 | * insert a fence into the command stream.. |
| 1195 | * |
| 1196 | * Contrary to the ttm_eu version of this function, it takes only |
| 1197 | * a single buffer object instead of a list, and it also doesn't |
| 1198 | * unreserve the buffer object, which needs to be done separately. |
| 1199 | */ |
| 1200 | void vmw_fence_single_bo(struct ttm_buffer_object *bo, |
| 1201 | struct vmw_fence_obj *fence) |
| 1202 | { |
| 1203 | struct ttm_bo_device *bdev = bo->bdev; |
| 1204 | struct ttm_bo_driver *driver = bdev->driver; |
| 1205 | struct vmw_fence_obj *old_fence_obj; |
| 1206 | struct vmw_private *dev_priv = |
| 1207 | container_of(bdev, struct vmw_private, bdev); |
| 1208 | |
| 1209 | if (fence == NULL) |
| 1210 | vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); |
| 1211 | else |
| 1212 | driver->sync_obj_ref(fence); |
| 1213 | |
| 1214 | spin_lock(&bdev->fence_lock); |
| 1215 | |
| 1216 | old_fence_obj = bo->sync_obj; |
| 1217 | bo->sync_obj = fence; |
| 1218 | |
| 1219 | spin_unlock(&bdev->fence_lock); |
| 1220 | |
| 1221 | if (old_fence_obj) |
| 1222 | vmw_fence_obj_unreference(&old_fence_obj); |
| 1223 | } |
| 1224 | |
| 1225 | /** |
| 1226 | * vmw_resource_move_notify - TTM move_notify_callback |
| 1227 | * |
| 1228 | * @bo: The TTM buffer object about to move. |
| 1229 | * @mem: The truct ttm_mem_reg indicating to what memory |
| 1230 | * region the move is taking place. |
| 1231 | * |
| 1232 | * For now does nothing. |
| 1233 | */ |
| 1234 | void vmw_resource_move_notify(struct ttm_buffer_object *bo, |
| 1235 | struct ttm_mem_reg *mem) |
| 1236 | { |
| 1237 | } |
| 1238 | |
| 1239 | /** |
| 1240 | * vmw_resource_needs_backup - Return whether a resource needs a backup buffer. |
| 1241 | * |
| 1242 | * @res: The resource being queried. |
| 1243 | */ |
| 1244 | bool vmw_resource_needs_backup(const struct vmw_resource *res) |
| 1245 | { |
| 1246 | return res->func->needs_backup; |
| 1247 | } |
| 1248 | |
| 1249 | /** |
| 1250 | * vmw_resource_evict_type - Evict all resources of a specific type |
| 1251 | * |
| 1252 | * @dev_priv: Pointer to a device private struct |
| 1253 | * @type: The resource type to evict |
| 1254 | * |
| 1255 | * To avoid thrashing starvation or as part of the hibernation sequence, |
| 1256 | * evict all evictable resources of a specific type. |
| 1257 | */ |
| 1258 | static void vmw_resource_evict_type(struct vmw_private *dev_priv, |
| 1259 | enum vmw_res_type type) |
| 1260 | { |
| 1261 | struct list_head *lru_list = &dev_priv->res_lru[type]; |
| 1262 | struct vmw_resource *evict_res; |
| 1263 | |
| 1264 | do { |
| 1265 | write_lock(&dev_priv->resource_lock); |
| 1266 | |
| 1267 | if (list_empty(lru_list)) |
| 1268 | goto out_unlock; |
| 1269 | |
| 1270 | evict_res = vmw_resource_reference( |
| 1271 | list_first_entry(lru_list, struct vmw_resource, |
| 1272 | lru_head)); |
| 1273 | list_del_init(&evict_res->lru_head); |
| 1274 | write_unlock(&dev_priv->resource_lock); |
| 1275 | vmw_resource_do_evict(evict_res); |
| 1276 | vmw_resource_unreference(&evict_res); |
| 1277 | } while (1); |
| 1278 | |
| 1279 | out_unlock: |
| 1280 | write_unlock(&dev_priv->resource_lock); |
| 1281 | } |
| 1282 | |
| 1283 | /** |
| 1284 | * vmw_resource_evict_all - Evict all evictable resources |
| 1285 | * |
| 1286 | * @dev_priv: Pointer to a device private struct |
| 1287 | * |
| 1288 | * To avoid thrashing starvation or as part of the hibernation sequence, |
| 1289 | * evict all evictable resources. In particular this means that all |
| 1290 | * guest-backed resources that are registered with the device are |
| 1291 | * evicted and the OTable becomes clean. |
| 1292 | */ |
| 1293 | void vmw_resource_evict_all(struct vmw_private *dev_priv) |
| 1294 | { |
| 1295 | enum vmw_res_type type; |
| 1296 | |
| 1297 | mutex_lock(&dev_priv->cmdbuf_mutex); |
| 1298 | |
| 1299 | for (type = 0; type < vmw_res_max; ++type) |
| 1300 | vmw_resource_evict_type(dev_priv, type); |
| 1301 | |
| 1302 | mutex_unlock(&dev_priv->cmdbuf_mutex); |
| 1303 | } |