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 | |
Thomas Hellstrom | ea029c2 | 2013-11-12 00:09:54 -0800 | [diff] [blame] | 35 | #define VMW_RES_EVICT_ERR_COUNT 10 |
| 36 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 37 | struct vmw_user_dma_buffer { |
Thomas Hellstrom | c486d4f | 2013-11-08 02:30:50 -0800 | [diff] [blame] | 38 | struct ttm_prime_object prime; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 39 | struct vmw_dma_buffer dma; |
| 40 | }; |
| 41 | |
| 42 | struct vmw_bo_user_rep { |
| 43 | uint32_t handle; |
| 44 | uint64_t map_handle; |
| 45 | }; |
| 46 | |
| 47 | struct vmw_stream { |
| 48 | struct vmw_resource res; |
| 49 | uint32_t stream_id; |
| 50 | }; |
| 51 | |
| 52 | struct vmw_user_stream { |
| 53 | struct ttm_base_object base; |
| 54 | struct vmw_stream stream; |
| 55 | }; |
| 56 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 57 | |
| 58 | static uint64_t vmw_user_stream_size; |
| 59 | |
| 60 | static const struct vmw_res_func vmw_stream_func = { |
| 61 | .res_type = vmw_res_stream, |
| 62 | .needs_backup = false, |
| 63 | .may_evict = false, |
| 64 | .type_name = "video streams", |
| 65 | .backup_placement = NULL, |
| 66 | .create = NULL, |
| 67 | .destroy = NULL, |
| 68 | .bind = NULL, |
| 69 | .unbind = NULL |
| 70 | }; |
| 71 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 72 | static inline struct vmw_dma_buffer * |
| 73 | vmw_dma_buffer(struct ttm_buffer_object *bo) |
| 74 | { |
| 75 | return container_of(bo, struct vmw_dma_buffer, base); |
| 76 | } |
| 77 | |
| 78 | static inline struct vmw_user_dma_buffer * |
| 79 | vmw_user_dma_buffer(struct ttm_buffer_object *bo) |
| 80 | { |
| 81 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); |
| 82 | return container_of(vmw_bo, struct vmw_user_dma_buffer, dma); |
| 83 | } |
| 84 | |
| 85 | struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) |
| 86 | { |
| 87 | kref_get(&res->kref); |
| 88 | return res; |
| 89 | } |
| 90 | |
Thomas Hellstrom | 30f82d81 | 2014-02-05 08:13:56 +0100 | [diff] [blame] | 91 | struct vmw_resource * |
| 92 | vmw_resource_reference_unless_doomed(struct vmw_resource *res) |
| 93 | { |
| 94 | return kref_get_unless_zero(&res->kref) ? res : NULL; |
| 95 | } |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 96 | |
| 97 | /** |
| 98 | * vmw_resource_release_id - release a resource id to the id manager. |
| 99 | * |
| 100 | * @res: Pointer to the resource. |
| 101 | * |
| 102 | * Release the resource id to the resource id manager and set it to -1 |
| 103 | */ |
Thomas Hellstrom | 543831c | 2012-11-20 12:19:36 +0000 | [diff] [blame] | 104 | void vmw_resource_release_id(struct vmw_resource *res) |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 105 | { |
| 106 | struct vmw_private *dev_priv = res->dev_priv; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 107 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 108 | |
| 109 | write_lock(&dev_priv->resource_lock); |
| 110 | if (res->id != -1) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 111 | idr_remove(idr, res->id); |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 112 | res->id = -1; |
| 113 | write_unlock(&dev_priv->resource_lock); |
| 114 | } |
| 115 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 116 | static void vmw_resource_release(struct kref *kref) |
| 117 | { |
| 118 | struct vmw_resource *res = |
| 119 | container_of(kref, struct vmw_resource, kref); |
| 120 | struct vmw_private *dev_priv = res->dev_priv; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 121 | int id; |
| 122 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 123 | |
Thomas Hellstrom | b9eb1a6 | 2015-04-02 02:39:45 -0700 | [diff] [blame^] | 124 | write_lock(&dev_priv->resource_lock); |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 125 | res->avail = false; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 126 | list_del_init(&res->lru_head); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 127 | write_unlock(&dev_priv->resource_lock); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 128 | if (res->backup) { |
| 129 | struct ttm_buffer_object *bo = &res->backup->base; |
| 130 | |
Thierry Reding | ee3939e | 2014-07-21 13:15:51 +0200 | [diff] [blame] | 131 | ttm_bo_reserve(bo, false, false, false, NULL); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 132 | if (!list_empty(&res->mob_head) && |
| 133 | res->func->unbind != NULL) { |
| 134 | struct ttm_validate_buffer val_buf; |
| 135 | |
| 136 | val_buf.bo = bo; |
Christian König | ae9c0af | 2014-09-04 20:01:52 +0200 | [diff] [blame] | 137 | val_buf.shared = false; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 138 | res->func->unbind(res, false, &val_buf); |
| 139 | } |
| 140 | res->backup_dirty = false; |
| 141 | list_del_init(&res->mob_head); |
| 142 | ttm_bo_unreserve(bo); |
| 143 | vmw_dmabuf_unreference(&res->backup); |
| 144 | } |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 145 | |
Thomas Hellstrom | 30f82d81 | 2014-02-05 08:13:56 +0100 | [diff] [blame] | 146 | if (likely(res->hw_destroy != NULL)) { |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 147 | res->hw_destroy(res); |
Thomas Hellstrom | 30f82d81 | 2014-02-05 08:13:56 +0100 | [diff] [blame] | 148 | mutex_lock(&dev_priv->binding_mutex); |
| 149 | vmw_context_binding_res_list_kill(&res->binding_head); |
| 150 | mutex_unlock(&dev_priv->binding_mutex); |
| 151 | } |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 152 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 153 | id = res->id; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 154 | if (res->res_free != NULL) |
| 155 | res->res_free(res); |
| 156 | else |
| 157 | kfree(res); |
| 158 | |
| 159 | write_lock(&dev_priv->resource_lock); |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 160 | if (id != -1) |
| 161 | idr_remove(idr, id); |
Thomas Hellstrom | b9eb1a6 | 2015-04-02 02:39:45 -0700 | [diff] [blame^] | 162 | write_unlock(&dev_priv->resource_lock); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | void vmw_resource_unreference(struct vmw_resource **p_res) |
| 166 | { |
| 167 | struct vmw_resource *res = *p_res; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 168 | |
| 169 | *p_res = NULL; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 170 | kref_put(&res->kref, vmw_resource_release); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 171 | } |
| 172 | |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 173 | |
| 174 | /** |
| 175 | * vmw_resource_alloc_id - release a resource id to the id manager. |
| 176 | * |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 177 | * @res: Pointer to the resource. |
| 178 | * |
| 179 | * Allocate the lowest free resource from the resource manager, and set |
| 180 | * @res->id to that id. Returns 0 on success and -ENOMEM on failure. |
| 181 | */ |
Thomas Hellstrom | 543831c | 2012-11-20 12:19:36 +0000 | [diff] [blame] | 182 | int vmw_resource_alloc_id(struct vmw_resource *res) |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 183 | { |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 184 | struct vmw_private *dev_priv = res->dev_priv; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 185 | int ret; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 186 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 187 | |
| 188 | BUG_ON(res->id != -1); |
| 189 | |
Tejun Heo | cc39a8f | 2013-02-27 17:04:14 -0800 | [diff] [blame] | 190 | idr_preload(GFP_KERNEL); |
| 191 | write_lock(&dev_priv->resource_lock); |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 192 | |
Tejun Heo | cc39a8f | 2013-02-27 17:04:14 -0800 | [diff] [blame] | 193 | ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT); |
| 194 | if (ret >= 0) |
| 195 | res->id = ret; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 196 | |
Tejun Heo | cc39a8f | 2013-02-27 17:04:14 -0800 | [diff] [blame] | 197 | write_unlock(&dev_priv->resource_lock); |
| 198 | idr_preload_end(); |
| 199 | return ret < 0 ? ret : 0; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 200 | } |
| 201 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 202 | /** |
| 203 | * vmw_resource_init - initialize a struct vmw_resource |
| 204 | * |
| 205 | * @dev_priv: Pointer to a device private struct. |
| 206 | * @res: The struct vmw_resource to initialize. |
| 207 | * @obj_type: Resource object type. |
| 208 | * @delay_id: Boolean whether to defer device id allocation until |
| 209 | * the first validation. |
| 210 | * @res_free: Resource destructor. |
| 211 | * @func: Resource function table. |
| 212 | */ |
Thomas Hellstrom | 543831c | 2012-11-20 12:19:36 +0000 | [diff] [blame] | 213 | int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res, |
| 214 | bool delay_id, |
| 215 | void (*res_free) (struct vmw_resource *res), |
| 216 | const struct vmw_res_func *func) |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 217 | { |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 218 | kref_init(&res->kref); |
| 219 | res->hw_destroy = NULL; |
| 220 | res->res_free = res_free; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 221 | res->avail = false; |
| 222 | res->dev_priv = dev_priv; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 223 | res->func = func; |
| 224 | INIT_LIST_HEAD(&res->lru_head); |
| 225 | INIT_LIST_HEAD(&res->mob_head); |
Thomas Hellstrom | 173fb7d | 2013-10-08 02:32:36 -0700 | [diff] [blame] | 226 | INIT_LIST_HEAD(&res->binding_head); |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 227 | res->id = -1; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 228 | res->backup = NULL; |
| 229 | res->backup_offset = 0; |
| 230 | res->backup_dirty = false; |
| 231 | res->res_dirty = false; |
Thomas Hellstrom | 5bb39e8 | 2011-10-04 20:13:33 +0200 | [diff] [blame] | 232 | if (delay_id) |
| 233 | return 0; |
| 234 | else |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 235 | return vmw_resource_alloc_id(res); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | /** |
| 239 | * vmw_resource_activate |
| 240 | * |
| 241 | * @res: Pointer to the newly created resource |
| 242 | * @hw_destroy: Destroy function. NULL if none. |
| 243 | * |
| 244 | * Activate a resource after the hardware has been made aware of it. |
| 245 | * Set tye destroy function to @destroy. Typically this frees the |
| 246 | * resource and destroys the hardware resources associated with it. |
| 247 | * Activate basically means that the function vmw_resource_lookup will |
| 248 | * find it. |
| 249 | */ |
Thomas Hellstrom | 543831c | 2012-11-20 12:19:36 +0000 | [diff] [blame] | 250 | void vmw_resource_activate(struct vmw_resource *res, |
| 251 | void (*hw_destroy) (struct vmw_resource *)) |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 252 | { |
| 253 | struct vmw_private *dev_priv = res->dev_priv; |
| 254 | |
| 255 | write_lock(&dev_priv->resource_lock); |
| 256 | res->avail = true; |
| 257 | res->hw_destroy = hw_destroy; |
| 258 | write_unlock(&dev_priv->resource_lock); |
| 259 | } |
| 260 | |
Thomas Hellstrom | b9eb1a6 | 2015-04-02 02:39:45 -0700 | [diff] [blame^] | 261 | static struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv, |
| 262 | struct idr *idr, int id) |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 263 | { |
| 264 | struct vmw_resource *res; |
| 265 | |
| 266 | read_lock(&dev_priv->resource_lock); |
| 267 | res = idr_find(idr, id); |
Thomas Hellstrom | b9eb1a6 | 2015-04-02 02:39:45 -0700 | [diff] [blame^] | 268 | if (!res || !res->avail || !kref_get_unless_zero(&res->kref)) |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 269 | res = NULL; |
Thomas Hellstrom | b9eb1a6 | 2015-04-02 02:39:45 -0700 | [diff] [blame^] | 270 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 271 | read_unlock(&dev_priv->resource_lock); |
| 272 | |
| 273 | if (unlikely(res == NULL)) |
| 274 | return NULL; |
| 275 | |
| 276 | return res; |
| 277 | } |
| 278 | |
| 279 | /** |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 280 | * vmw_user_resource_lookup_handle - lookup a struct resource from a |
| 281 | * TTM user-space handle and perform basic type checks |
| 282 | * |
| 283 | * @dev_priv: Pointer to a device private struct |
| 284 | * @tfile: Pointer to a struct ttm_object_file identifying the caller |
| 285 | * @handle: The TTM user-space handle |
| 286 | * @converter: Pointer to an object describing the resource type |
| 287 | * @p_res: On successful return the location pointed to will contain |
| 288 | * a pointer to a refcounted struct vmw_resource. |
| 289 | * |
| 290 | * If the handle can't be found or is associated with an incorrect resource |
| 291 | * type, -EINVAL will be returned. |
| 292 | */ |
| 293 | int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv, |
| 294 | struct ttm_object_file *tfile, |
| 295 | uint32_t handle, |
| 296 | const struct vmw_user_resource_conv |
| 297 | *converter, |
| 298 | struct vmw_resource **p_res) |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 299 | { |
Thomas Hellstrom | 7a73ba7 | 2009-12-22 16:53:41 +0100 | [diff] [blame] | 300 | struct ttm_base_object *base; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 301 | struct vmw_resource *res; |
| 302 | int ret = -EINVAL; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 303 | |
Thomas Hellstrom | 7a73ba7 | 2009-12-22 16:53:41 +0100 | [diff] [blame] | 304 | base = ttm_base_object_lookup(tfile, handle); |
| 305 | if (unlikely(base == NULL)) |
| 306 | return -EINVAL; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 307 | |
Thomas Hellstrom | 79e5f81 | 2013-11-08 02:12:51 -0800 | [diff] [blame] | 308 | if (unlikely(ttm_base_object_type(base) != converter->object_type)) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 309 | goto out_bad_resource; |
Thomas Hellstrom | 7a73ba7 | 2009-12-22 16:53:41 +0100 | [diff] [blame] | 310 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 311 | res = converter->base_obj_to_res(base); |
| 312 | |
| 313 | read_lock(&dev_priv->resource_lock); |
| 314 | if (!res->avail || res->res_free != converter->res_free) { |
| 315 | read_unlock(&dev_priv->resource_lock); |
| 316 | goto out_bad_resource; |
| 317 | } |
| 318 | |
| 319 | kref_get(&res->kref); |
| 320 | read_unlock(&dev_priv->resource_lock); |
| 321 | |
| 322 | *p_res = res; |
Thomas Hellstrom | 7a73ba7 | 2009-12-22 16:53:41 +0100 | [diff] [blame] | 323 | ret = 0; |
| 324 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 325 | out_bad_resource: |
Thomas Hellstrom | 7a73ba7 | 2009-12-22 16:53:41 +0100 | [diff] [blame] | 326 | ttm_base_object_unref(&base); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 327 | |
| 328 | return ret; |
| 329 | } |
| 330 | |
| 331 | /** |
| 332 | * Helper function that looks either a surface or dmabuf. |
| 333 | * |
| 334 | * The pointer this pointed at by out_surf and out_buf needs to be null. |
| 335 | */ |
| 336 | int vmw_user_lookup_handle(struct vmw_private *dev_priv, |
| 337 | struct ttm_object_file *tfile, |
| 338 | uint32_t handle, |
| 339 | struct vmw_surface **out_surf, |
| 340 | struct vmw_dma_buffer **out_buf) |
| 341 | { |
| 342 | struct vmw_resource *res; |
| 343 | int ret; |
| 344 | |
| 345 | BUG_ON(*out_surf || *out_buf); |
| 346 | |
| 347 | ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle, |
| 348 | user_surface_converter, |
| 349 | &res); |
| 350 | if (!ret) { |
| 351 | *out_surf = vmw_res_to_srf(res); |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | *out_surf = NULL; |
| 356 | ret = vmw_user_dmabuf_lookup(tfile, handle, out_buf); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 357 | return ret; |
| 358 | } |
| 359 | |
| 360 | /** |
| 361 | * Buffer management. |
| 362 | */ |
Thomas Hellstrom | 308d17e | 2013-11-28 01:46:56 -0800 | [diff] [blame] | 363 | |
| 364 | /** |
| 365 | * vmw_dmabuf_acc_size - Calculate the pinned memory usage of buffers |
| 366 | * |
| 367 | * @dev_priv: Pointer to a struct vmw_private identifying the device. |
| 368 | * @size: The requested buffer size. |
| 369 | * @user: Whether this is an ordinary dma buffer or a user dma buffer. |
| 370 | */ |
| 371 | static size_t vmw_dmabuf_acc_size(struct vmw_private *dev_priv, size_t size, |
| 372 | bool user) |
| 373 | { |
| 374 | static size_t struct_size, user_struct_size; |
| 375 | size_t num_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; |
| 376 | size_t page_array_size = ttm_round_pot(num_pages * sizeof(void *)); |
| 377 | |
| 378 | if (unlikely(struct_size == 0)) { |
| 379 | size_t backend_size = ttm_round_pot(vmw_tt_size); |
| 380 | |
| 381 | struct_size = backend_size + |
| 382 | ttm_round_pot(sizeof(struct vmw_dma_buffer)); |
| 383 | user_struct_size = backend_size + |
| 384 | ttm_round_pot(sizeof(struct vmw_user_dma_buffer)); |
| 385 | } |
| 386 | |
| 387 | if (dev_priv->map_mode == vmw_dma_alloc_coherent) |
| 388 | page_array_size += |
| 389 | ttm_round_pot(num_pages * sizeof(dma_addr_t)); |
| 390 | |
| 391 | return ((user) ? user_struct_size : struct_size) + |
| 392 | page_array_size; |
| 393 | } |
| 394 | |
Thomas Hellstrom | effe110 | 2010-01-13 22:28:39 +0100 | [diff] [blame] | 395 | void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo) |
| 396 | { |
| 397 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); |
Thomas Hellstrom | effe110 | 2010-01-13 22:28:39 +0100 | [diff] [blame] | 398 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 399 | kfree(vmw_bo); |
| 400 | } |
| 401 | |
Thomas Hellstrom | 308d17e | 2013-11-28 01:46:56 -0800 | [diff] [blame] | 402 | static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo) |
| 403 | { |
| 404 | struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo); |
| 405 | |
| 406 | ttm_prime_object_kfree(vmw_user_bo, prime); |
| 407 | } |
| 408 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 409 | int vmw_dmabuf_init(struct vmw_private *dev_priv, |
| 410 | struct vmw_dma_buffer *vmw_bo, |
| 411 | size_t size, struct ttm_placement *placement, |
| 412 | bool interruptible, |
| 413 | void (*bo_free) (struct ttm_buffer_object *bo)) |
| 414 | { |
| 415 | struct ttm_bo_device *bdev = &dev_priv->bdev; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 416 | size_t acc_size; |
| 417 | int ret; |
Thomas Hellstrom | 308d17e | 2013-11-28 01:46:56 -0800 | [diff] [blame] | 418 | bool user = (bo_free == &vmw_user_dmabuf_destroy); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 419 | |
Thomas Hellstrom | 308d17e | 2013-11-28 01:46:56 -0800 | [diff] [blame] | 420 | BUG_ON(!bo_free && (!user && (bo_free != vmw_dmabuf_bo_free))); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 421 | |
Thomas Hellstrom | 308d17e | 2013-11-28 01:46:56 -0800 | [diff] [blame] | 422 | acc_size = vmw_dmabuf_acc_size(dev_priv, size, user); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 423 | memset(vmw_bo, 0, sizeof(*vmw_bo)); |
| 424 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 425 | INIT_LIST_HEAD(&vmw_bo->res_list); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 426 | |
| 427 | ret = ttm_bo_init(bdev, &vmw_bo->base, size, |
Thomas Hellstrom | a34417f | 2014-02-28 13:33:21 +0100 | [diff] [blame] | 428 | ttm_bo_type_device, placement, |
Marcin Slusarz | 0b91c4a | 2012-11-06 21:49:51 +0000 | [diff] [blame] | 429 | 0, interruptible, |
Maarten Lankhorst | f4f4e3e | 2014-01-09 11:03:15 +0100 | [diff] [blame] | 430 | NULL, acc_size, NULL, NULL, bo_free); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 431 | return ret; |
| 432 | } |
| 433 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 434 | static void vmw_user_dmabuf_release(struct ttm_base_object **p_base) |
| 435 | { |
| 436 | struct vmw_user_dma_buffer *vmw_user_bo; |
| 437 | struct ttm_base_object *base = *p_base; |
| 438 | struct ttm_buffer_object *bo; |
| 439 | |
| 440 | *p_base = NULL; |
| 441 | |
| 442 | if (unlikely(base == NULL)) |
| 443 | return; |
| 444 | |
Thomas Hellstrom | c486d4f | 2013-11-08 02:30:50 -0800 | [diff] [blame] | 445 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, |
| 446 | prime.base); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 447 | bo = &vmw_user_bo->dma.base; |
| 448 | ttm_bo_unref(&bo); |
| 449 | } |
| 450 | |
Thomas Hellstrom | 1d7a5cb | 2012-11-21 12:32:19 +0100 | [diff] [blame] | 451 | static void vmw_user_dmabuf_ref_obj_release(struct ttm_base_object *base, |
| 452 | enum ttm_ref_type ref_type) |
| 453 | { |
| 454 | struct vmw_user_dma_buffer *user_bo; |
| 455 | user_bo = container_of(base, struct vmw_user_dma_buffer, prime.base); |
| 456 | |
| 457 | switch (ref_type) { |
| 458 | case TTM_REF_SYNCCPU_WRITE: |
| 459 | ttm_bo_synccpu_write_release(&user_bo->dma.base); |
| 460 | break; |
| 461 | default: |
| 462 | BUG(); |
| 463 | } |
| 464 | } |
| 465 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 466 | /** |
| 467 | * vmw_user_dmabuf_alloc - Allocate a user dma buffer |
| 468 | * |
| 469 | * @dev_priv: Pointer to a struct device private. |
| 470 | * @tfile: Pointer to a struct ttm_object_file on which to register the user |
| 471 | * object. |
| 472 | * @size: Size of the dma buffer. |
| 473 | * @shareable: Boolean whether the buffer is shareable with other open files. |
| 474 | * @handle: Pointer to where the handle value should be assigned. |
| 475 | * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer |
| 476 | * should be assigned. |
| 477 | */ |
| 478 | int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv, |
| 479 | struct ttm_object_file *tfile, |
| 480 | uint32_t size, |
| 481 | bool shareable, |
| 482 | uint32_t *handle, |
| 483 | struct vmw_dma_buffer **p_dma_buf) |
| 484 | { |
| 485 | struct vmw_user_dma_buffer *user_bo; |
| 486 | struct ttm_buffer_object *tmp; |
| 487 | int ret; |
| 488 | |
| 489 | user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL); |
| 490 | if (unlikely(user_bo == NULL)) { |
| 491 | DRM_ERROR("Failed to allocate a buffer.\n"); |
| 492 | return -ENOMEM; |
| 493 | } |
| 494 | |
| 495 | ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size, |
Thomas Hellstrom | 96c5f0d | 2012-11-21 11:19:53 +0100 | [diff] [blame] | 496 | (dev_priv->has_mob) ? |
Thomas Hellstrom | 6bf6bf0 | 2015-06-26 02:22:40 -0700 | [diff] [blame] | 497 | &vmw_sys_placement : |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 498 | &vmw_vram_sys_placement, true, |
| 499 | &vmw_user_dmabuf_destroy); |
| 500 | if (unlikely(ret != 0)) |
| 501 | return ret; |
| 502 | |
| 503 | tmp = ttm_bo_reference(&user_bo->dma.base); |
Thomas Hellstrom | c486d4f | 2013-11-08 02:30:50 -0800 | [diff] [blame] | 504 | ret = ttm_prime_object_init(tfile, |
| 505 | size, |
| 506 | &user_bo->prime, |
| 507 | shareable, |
| 508 | ttm_buffer_type, |
Thomas Hellstrom | 1d7a5cb | 2012-11-21 12:32:19 +0100 | [diff] [blame] | 509 | &vmw_user_dmabuf_release, |
| 510 | &vmw_user_dmabuf_ref_obj_release); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 511 | if (unlikely(ret != 0)) { |
| 512 | ttm_bo_unref(&tmp); |
| 513 | goto out_no_base_object; |
| 514 | } |
| 515 | |
| 516 | *p_dma_buf = &user_bo->dma; |
Thomas Hellstrom | c486d4f | 2013-11-08 02:30:50 -0800 | [diff] [blame] | 517 | *handle = user_bo->prime.base.hash.key; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 518 | |
| 519 | out_no_base_object: |
| 520 | return ret; |
| 521 | } |
| 522 | |
Thomas Hellstrom | d08a9b9 | 2012-11-21 16:04:18 +0100 | [diff] [blame] | 523 | /** |
| 524 | * vmw_user_dmabuf_verify_access - verify access permissions on this |
| 525 | * buffer object. |
| 526 | * |
| 527 | * @bo: Pointer to the buffer object being accessed |
| 528 | * @tfile: Identifying the caller. |
| 529 | */ |
| 530 | int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo, |
| 531 | struct ttm_object_file *tfile) |
| 532 | { |
| 533 | struct vmw_user_dma_buffer *vmw_user_bo; |
| 534 | |
| 535 | if (unlikely(bo->destroy != vmw_user_dmabuf_destroy)) |
| 536 | return -EPERM; |
| 537 | |
| 538 | vmw_user_bo = vmw_user_dma_buffer(bo); |
Thomas Hellstrom | f6dfe73 | 2014-03-19 15:06:21 +0100 | [diff] [blame] | 539 | |
| 540 | /* Check that the caller has opened the object. */ |
| 541 | if (likely(ttm_ref_object_exists(tfile, &vmw_user_bo->prime.base))) |
| 542 | return 0; |
| 543 | |
| 544 | DRM_ERROR("Could not grant buffer access.\n"); |
| 545 | return -EPERM; |
Thomas Hellstrom | d08a9b9 | 2012-11-21 16:04:18 +0100 | [diff] [blame] | 546 | } |
| 547 | |
Thomas Hellstrom | 1d7a5cb | 2012-11-21 12:32:19 +0100 | [diff] [blame] | 548 | /** |
| 549 | * vmw_user_dmabuf_synccpu_grab - Grab a struct vmw_user_dma_buffer for cpu |
| 550 | * access, idling previous GPU operations on the buffer and optionally |
| 551 | * blocking it for further command submissions. |
| 552 | * |
| 553 | * @user_bo: Pointer to the buffer object being grabbed for CPU access |
| 554 | * @tfile: Identifying the caller. |
| 555 | * @flags: Flags indicating how the grab should be performed. |
| 556 | * |
| 557 | * A blocking grab will be automatically released when @tfile is closed. |
| 558 | */ |
| 559 | static int vmw_user_dmabuf_synccpu_grab(struct vmw_user_dma_buffer *user_bo, |
| 560 | struct ttm_object_file *tfile, |
| 561 | uint32_t flags) |
| 562 | { |
| 563 | struct ttm_buffer_object *bo = &user_bo->dma.base; |
| 564 | bool existed; |
| 565 | int ret; |
| 566 | |
| 567 | if (flags & drm_vmw_synccpu_allow_cs) { |
Maarten Lankhorst | dd7cfd6 | 2014-01-21 13:07:31 +0100 | [diff] [blame] | 568 | bool nonblock = !!(flags & drm_vmw_synccpu_dontblock); |
Maarten Lankhorst | 5fbad992 | 2014-05-14 15:41:49 +0200 | [diff] [blame] | 569 | long lret; |
Thomas Hellstrom | 1d7a5cb | 2012-11-21 12:32:19 +0100 | [diff] [blame] | 570 | |
Maarten Lankhorst | 5fbad992 | 2014-05-14 15:41:49 +0200 | [diff] [blame] | 571 | if (nonblock) |
| 572 | return reservation_object_test_signaled_rcu(bo->resv, true) ? 0 : -EBUSY; |
| 573 | |
| 574 | lret = reservation_object_wait_timeout_rcu(bo->resv, true, true, MAX_SCHEDULE_TIMEOUT); |
| 575 | if (!lret) |
| 576 | return -EBUSY; |
| 577 | else if (lret < 0) |
| 578 | return lret; |
| 579 | return 0; |
Thomas Hellstrom | 1d7a5cb | 2012-11-21 12:32:19 +0100 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | ret = ttm_bo_synccpu_write_grab |
| 583 | (bo, !!(flags & drm_vmw_synccpu_dontblock)); |
| 584 | if (unlikely(ret != 0)) |
| 585 | return ret; |
| 586 | |
| 587 | ret = ttm_ref_object_add(tfile, &user_bo->prime.base, |
| 588 | TTM_REF_SYNCCPU_WRITE, &existed); |
| 589 | if (ret != 0 || existed) |
| 590 | ttm_bo_synccpu_write_release(&user_bo->dma.base); |
| 591 | |
| 592 | return ret; |
| 593 | } |
| 594 | |
| 595 | /** |
| 596 | * vmw_user_dmabuf_synccpu_release - Release a previous grab for CPU access, |
| 597 | * and unblock command submission on the buffer if blocked. |
| 598 | * |
| 599 | * @handle: Handle identifying the buffer object. |
| 600 | * @tfile: Identifying the caller. |
| 601 | * @flags: Flags indicating the type of release. |
| 602 | */ |
| 603 | static int vmw_user_dmabuf_synccpu_release(uint32_t handle, |
| 604 | struct ttm_object_file *tfile, |
| 605 | uint32_t flags) |
| 606 | { |
| 607 | if (!(flags & drm_vmw_synccpu_allow_cs)) |
| 608 | return ttm_ref_object_base_unref(tfile, handle, |
| 609 | TTM_REF_SYNCCPU_WRITE); |
| 610 | |
| 611 | return 0; |
| 612 | } |
| 613 | |
| 614 | /** |
| 615 | * vmw_user_dmabuf_synccpu_release - ioctl function implementing the synccpu |
| 616 | * functionality. |
| 617 | * |
| 618 | * @dev: Identifies the drm device. |
| 619 | * @data: Pointer to the ioctl argument. |
| 620 | * @file_priv: Identifies the caller. |
| 621 | * |
| 622 | * This function checks the ioctl arguments for validity and calls the |
| 623 | * relevant synccpu functions. |
| 624 | */ |
| 625 | int vmw_user_dmabuf_synccpu_ioctl(struct drm_device *dev, void *data, |
| 626 | struct drm_file *file_priv) |
| 627 | { |
| 628 | struct drm_vmw_synccpu_arg *arg = |
| 629 | (struct drm_vmw_synccpu_arg *) data; |
| 630 | struct vmw_dma_buffer *dma_buf; |
| 631 | struct vmw_user_dma_buffer *user_bo; |
| 632 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
| 633 | int ret; |
| 634 | |
| 635 | if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0 |
| 636 | || (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write | |
| 637 | drm_vmw_synccpu_dontblock | |
| 638 | drm_vmw_synccpu_allow_cs)) != 0) { |
| 639 | DRM_ERROR("Illegal synccpu flags.\n"); |
| 640 | return -EINVAL; |
| 641 | } |
| 642 | |
| 643 | switch (arg->op) { |
| 644 | case drm_vmw_synccpu_grab: |
| 645 | ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &dma_buf); |
| 646 | if (unlikely(ret != 0)) |
| 647 | return ret; |
| 648 | |
| 649 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, |
| 650 | dma); |
| 651 | ret = vmw_user_dmabuf_synccpu_grab(user_bo, tfile, arg->flags); |
| 652 | vmw_dmabuf_unreference(&dma_buf); |
| 653 | if (unlikely(ret != 0 && ret != -ERESTARTSYS && |
| 654 | ret != -EBUSY)) { |
| 655 | DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n", |
| 656 | (unsigned int) arg->handle); |
| 657 | return ret; |
| 658 | } |
| 659 | break; |
| 660 | case drm_vmw_synccpu_release: |
| 661 | ret = vmw_user_dmabuf_synccpu_release(arg->handle, tfile, |
| 662 | arg->flags); |
| 663 | if (unlikely(ret != 0)) { |
| 664 | DRM_ERROR("Failed synccpu release on handle 0x%08x.\n", |
| 665 | (unsigned int) arg->handle); |
| 666 | return ret; |
| 667 | } |
| 668 | break; |
| 669 | default: |
| 670 | DRM_ERROR("Invalid synccpu operation.\n"); |
| 671 | return -EINVAL; |
| 672 | } |
| 673 | |
| 674 | return 0; |
| 675 | } |
| 676 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 677 | int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data, |
| 678 | struct drm_file *file_priv) |
| 679 | { |
| 680 | struct vmw_private *dev_priv = vmw_priv(dev); |
| 681 | union drm_vmw_alloc_dmabuf_arg *arg = |
| 682 | (union drm_vmw_alloc_dmabuf_arg *)data; |
| 683 | struct drm_vmw_alloc_dmabuf_req *req = &arg->req; |
| 684 | struct drm_vmw_dmabuf_rep *rep = &arg->rep; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 685 | struct vmw_dma_buffer *dma_buf; |
| 686 | uint32_t handle; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 687 | int ret; |
| 688 | |
Thomas Hellstrom | 294adf7 | 2014-02-27 12:34:51 +0100 | [diff] [blame] | 689 | ret = ttm_read_lock(&dev_priv->reservation_sem, true); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 690 | if (unlikely(ret != 0)) |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 691 | return ret; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 692 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 693 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
| 694 | req->size, false, &handle, &dma_buf); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 695 | if (unlikely(ret != 0)) |
Thomas Hellstrom | 2f5993c | 2010-11-17 13:24:48 +0100 | [diff] [blame] | 696 | goto out_no_dmabuf; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 697 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 698 | rep->handle = handle; |
David Herrmann | 72525b3 | 2013-07-24 21:08:53 +0200 | [diff] [blame] | 699 | rep->map_handle = drm_vma_node_offset_addr(&dma_buf->base.vma_node); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 700 | rep->cur_gmr_id = handle; |
| 701 | rep->cur_gmr_offset = 0; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 702 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 703 | vmw_dmabuf_unreference(&dma_buf); |
| 704 | |
Thomas Hellstrom | 2f5993c | 2010-11-17 13:24:48 +0100 | [diff] [blame] | 705 | out_no_dmabuf: |
Thomas Hellstrom | 294adf7 | 2014-02-27 12:34:51 +0100 | [diff] [blame] | 706 | ttm_read_unlock(&dev_priv->reservation_sem); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 707 | |
Thomas Hellstrom | 2f5993c | 2010-11-17 13:24:48 +0100 | [diff] [blame] | 708 | return ret; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 709 | } |
| 710 | |
| 711 | int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data, |
| 712 | struct drm_file *file_priv) |
| 713 | { |
| 714 | struct drm_vmw_unref_dmabuf_arg *arg = |
| 715 | (struct drm_vmw_unref_dmabuf_arg *)data; |
| 716 | |
| 717 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, |
| 718 | arg->handle, |
| 719 | TTM_REF_USAGE); |
| 720 | } |
| 721 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 722 | int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile, |
| 723 | uint32_t handle, struct vmw_dma_buffer **out) |
| 724 | { |
| 725 | struct vmw_user_dma_buffer *vmw_user_bo; |
| 726 | struct ttm_base_object *base; |
| 727 | |
| 728 | base = ttm_base_object_lookup(tfile, handle); |
| 729 | if (unlikely(base == NULL)) { |
| 730 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", |
| 731 | (unsigned long)handle); |
| 732 | return -ESRCH; |
| 733 | } |
| 734 | |
Thomas Hellstrom | c486d4f | 2013-11-08 02:30:50 -0800 | [diff] [blame] | 735 | if (unlikely(ttm_base_object_type(base) != ttm_buffer_type)) { |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 736 | ttm_base_object_unref(&base); |
| 737 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", |
| 738 | (unsigned long)handle); |
| 739 | return -EINVAL; |
| 740 | } |
| 741 | |
Thomas Hellstrom | c486d4f | 2013-11-08 02:30:50 -0800 | [diff] [blame] | 742 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, |
| 743 | prime.base); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 744 | (void)ttm_bo_reference(&vmw_user_bo->dma.base); |
| 745 | ttm_base_object_unref(&base); |
| 746 | *out = &vmw_user_bo->dma; |
| 747 | |
| 748 | return 0; |
| 749 | } |
| 750 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 751 | int vmw_user_dmabuf_reference(struct ttm_object_file *tfile, |
Thomas Hellstrom | a97e219 | 2012-11-21 11:45:13 +0100 | [diff] [blame] | 752 | struct vmw_dma_buffer *dma_buf, |
| 753 | uint32_t *handle) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 754 | { |
| 755 | struct vmw_user_dma_buffer *user_bo; |
| 756 | |
| 757 | if (dma_buf->base.destroy != vmw_user_dmabuf_destroy) |
| 758 | return -EINVAL; |
| 759 | |
| 760 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma); |
Thomas Hellstrom | a97e219 | 2012-11-21 11:45:13 +0100 | [diff] [blame] | 761 | |
| 762 | *handle = user_bo->prime.base.hash.key; |
Thomas Hellstrom | c486d4f | 2013-11-08 02:30:50 -0800 | [diff] [blame] | 763 | return ttm_ref_object_add(tfile, &user_bo->prime.base, |
| 764 | TTM_REF_USAGE, NULL); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 765 | } |
| 766 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 767 | /* |
Uwe Kleine-König | 65155b3 | 2010-06-11 12:17:01 +0200 | [diff] [blame] | 768 | * Stream management |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 769 | */ |
| 770 | |
| 771 | static void vmw_stream_destroy(struct vmw_resource *res) |
| 772 | { |
| 773 | struct vmw_private *dev_priv = res->dev_priv; |
| 774 | struct vmw_stream *stream; |
| 775 | int ret; |
| 776 | |
| 777 | DRM_INFO("%s: unref\n", __func__); |
| 778 | stream = container_of(res, struct vmw_stream, res); |
| 779 | |
| 780 | ret = vmw_overlay_unref(dev_priv, stream->stream_id); |
| 781 | WARN_ON(ret != 0); |
| 782 | } |
| 783 | |
| 784 | static int vmw_stream_init(struct vmw_private *dev_priv, |
| 785 | struct vmw_stream *stream, |
| 786 | void (*res_free) (struct vmw_resource *res)) |
| 787 | { |
| 788 | struct vmw_resource *res = &stream->res; |
| 789 | int ret; |
| 790 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 791 | ret = vmw_resource_init(dev_priv, res, false, res_free, |
| 792 | &vmw_stream_func); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 793 | |
| 794 | if (unlikely(ret != 0)) { |
| 795 | if (res_free == NULL) |
| 796 | kfree(stream); |
| 797 | else |
| 798 | res_free(&stream->res); |
| 799 | return ret; |
| 800 | } |
| 801 | |
| 802 | ret = vmw_overlay_claim(dev_priv, &stream->stream_id); |
| 803 | if (ret) { |
| 804 | vmw_resource_unreference(&res); |
| 805 | return ret; |
| 806 | } |
| 807 | |
| 808 | DRM_INFO("%s: claimed\n", __func__); |
| 809 | |
| 810 | vmw_resource_activate(&stream->res, vmw_stream_destroy); |
| 811 | return 0; |
| 812 | } |
| 813 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 814 | static void vmw_user_stream_free(struct vmw_resource *res) |
| 815 | { |
| 816 | struct vmw_user_stream *stream = |
| 817 | container_of(res, struct vmw_user_stream, stream.res); |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 818 | struct vmw_private *dev_priv = res->dev_priv; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 819 | |
Thomas Hellstrom | cdad052 | 2012-11-06 11:31:50 +0000 | [diff] [blame] | 820 | ttm_base_object_kfree(stream, base); |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 821 | ttm_mem_global_free(vmw_mem_glob(dev_priv), |
| 822 | vmw_user_stream_size); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | /** |
| 826 | * This function is called when user space has no more references on the |
| 827 | * base object. It releases the base-object's reference on the resource object. |
| 828 | */ |
| 829 | |
| 830 | static void vmw_user_stream_base_release(struct ttm_base_object **p_base) |
| 831 | { |
| 832 | struct ttm_base_object *base = *p_base; |
| 833 | struct vmw_user_stream *stream = |
| 834 | container_of(base, struct vmw_user_stream, base); |
| 835 | struct vmw_resource *res = &stream->stream.res; |
| 836 | |
| 837 | *p_base = NULL; |
| 838 | vmw_resource_unreference(&res); |
| 839 | } |
| 840 | |
| 841 | int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, |
| 842 | struct drm_file *file_priv) |
| 843 | { |
| 844 | struct vmw_private *dev_priv = vmw_priv(dev); |
| 845 | struct vmw_resource *res; |
| 846 | struct vmw_user_stream *stream; |
| 847 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; |
| 848 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 849 | struct idr *idr = &dev_priv->res_idr[vmw_res_stream]; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 850 | int ret = 0; |
| 851 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 852 | |
| 853 | res = vmw_resource_lookup(dev_priv, idr, arg->stream_id); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 854 | if (unlikely(res == NULL)) |
| 855 | return -EINVAL; |
| 856 | |
| 857 | if (res->res_free != &vmw_user_stream_free) { |
| 858 | ret = -EINVAL; |
| 859 | goto out; |
| 860 | } |
| 861 | |
| 862 | stream = container_of(res, struct vmw_user_stream, stream.res); |
| 863 | if (stream->base.tfile != tfile) { |
| 864 | ret = -EINVAL; |
| 865 | goto out; |
| 866 | } |
| 867 | |
| 868 | ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE); |
| 869 | out: |
| 870 | vmw_resource_unreference(&res); |
| 871 | return ret; |
| 872 | } |
| 873 | |
| 874 | int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, |
| 875 | struct drm_file *file_priv) |
| 876 | { |
| 877 | struct vmw_private *dev_priv = vmw_priv(dev); |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 878 | struct vmw_user_stream *stream; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 879 | struct vmw_resource *res; |
| 880 | struct vmw_resource *tmp; |
| 881 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; |
| 882 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
| 883 | int ret; |
| 884 | |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 885 | /* |
| 886 | * Approximate idr memory usage with 128 bytes. It will be limited |
| 887 | * by maximum number_of streams anyway? |
| 888 | */ |
| 889 | |
| 890 | if (unlikely(vmw_user_stream_size == 0)) |
| 891 | vmw_user_stream_size = ttm_round_pot(sizeof(*stream)) + 128; |
| 892 | |
Thomas Hellstrom | 294adf7 | 2014-02-27 12:34:51 +0100 | [diff] [blame] | 893 | ret = ttm_read_lock(&dev_priv->reservation_sem, true); |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 894 | if (unlikely(ret != 0)) |
| 895 | return ret; |
| 896 | |
| 897 | ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), |
| 898 | vmw_user_stream_size, |
| 899 | false, true); |
Thomas Hellstrom | ee511a8 | 2015-06-25 12:00:39 -0700 | [diff] [blame] | 900 | ttm_read_unlock(&dev_priv->reservation_sem); |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 901 | if (unlikely(ret != 0)) { |
| 902 | if (ret != -ERESTARTSYS) |
| 903 | DRM_ERROR("Out of graphics memory for stream" |
| 904 | " creation.\n"); |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 905 | |
Thomas Hellstrom | ee511a8 | 2015-06-25 12:00:39 -0700 | [diff] [blame] | 906 | goto out_ret; |
| 907 | } |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 908 | |
| 909 | stream = kmalloc(sizeof(*stream), GFP_KERNEL); |
| 910 | if (unlikely(stream == NULL)) { |
| 911 | ttm_mem_global_free(vmw_mem_glob(dev_priv), |
| 912 | vmw_user_stream_size); |
| 913 | ret = -ENOMEM; |
Thomas Hellstrom | ee511a8 | 2015-06-25 12:00:39 -0700 | [diff] [blame] | 914 | goto out_ret; |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 915 | } |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 916 | |
| 917 | res = &stream->stream.res; |
| 918 | stream->base.shareable = false; |
| 919 | stream->base.tfile = NULL; |
| 920 | |
Thomas Hellstrom | 414ee50 | 2011-10-07 15:23:06 +0200 | [diff] [blame] | 921 | /* |
| 922 | * From here on, the destructor takes over resource freeing. |
| 923 | */ |
| 924 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 925 | ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free); |
| 926 | if (unlikely(ret != 0)) |
Thomas Hellstrom | ee511a8 | 2015-06-25 12:00:39 -0700 | [diff] [blame] | 927 | goto out_ret; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 928 | |
| 929 | tmp = vmw_resource_reference(res); |
| 930 | ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM, |
| 931 | &vmw_user_stream_base_release, NULL); |
| 932 | |
| 933 | if (unlikely(ret != 0)) { |
| 934 | vmw_resource_unreference(&tmp); |
| 935 | goto out_err; |
| 936 | } |
| 937 | |
| 938 | arg->stream_id = res->id; |
| 939 | out_err: |
| 940 | vmw_resource_unreference(&res); |
Thomas Hellstrom | ee511a8 | 2015-06-25 12:00:39 -0700 | [diff] [blame] | 941 | out_ret: |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 942 | return ret; |
| 943 | } |
| 944 | |
| 945 | int vmw_user_stream_lookup(struct vmw_private *dev_priv, |
| 946 | struct ttm_object_file *tfile, |
| 947 | uint32_t *inout_id, struct vmw_resource **out) |
| 948 | { |
| 949 | struct vmw_user_stream *stream; |
| 950 | struct vmw_resource *res; |
| 951 | int ret; |
| 952 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 953 | res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream], |
| 954 | *inout_id); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 955 | if (unlikely(res == NULL)) |
| 956 | return -EINVAL; |
| 957 | |
| 958 | if (res->res_free != &vmw_user_stream_free) { |
| 959 | ret = -EINVAL; |
| 960 | goto err_ref; |
| 961 | } |
| 962 | |
| 963 | stream = container_of(res, struct vmw_user_stream, stream.res); |
| 964 | if (stream->base.tfile != tfile) { |
| 965 | ret = -EPERM; |
| 966 | goto err_ref; |
| 967 | } |
| 968 | |
| 969 | *inout_id = stream->stream.stream_id; |
| 970 | *out = res; |
| 971 | return 0; |
| 972 | err_ref: |
| 973 | vmw_resource_unreference(&res); |
| 974 | return ret; |
| 975 | } |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 976 | |
| 977 | |
Thomas Hellstrom | d69d51d | 2013-11-28 00:28:30 -0800 | [diff] [blame] | 978 | /** |
| 979 | * vmw_dumb_create - Create a dumb kms buffer |
| 980 | * |
| 981 | * @file_priv: Pointer to a struct drm_file identifying the caller. |
| 982 | * @dev: Pointer to the drm device. |
| 983 | * @args: Pointer to a struct drm_mode_create_dumb structure |
| 984 | * |
| 985 | * This is a driver callback for the core drm create_dumb functionality. |
| 986 | * Note that this is very similar to the vmw_dmabuf_alloc ioctl, except |
| 987 | * that the arguments have a different format. |
| 988 | */ |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 989 | int vmw_dumb_create(struct drm_file *file_priv, |
| 990 | struct drm_device *dev, |
| 991 | struct drm_mode_create_dumb *args) |
| 992 | { |
| 993 | struct vmw_private *dev_priv = vmw_priv(dev); |
Thomas Hellstrom | d69d51d | 2013-11-28 00:28:30 -0800 | [diff] [blame] | 994 | struct vmw_dma_buffer *dma_buf; |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 995 | int ret; |
| 996 | |
| 997 | args->pitch = args->width * ((args->bpp + 7) / 8); |
| 998 | args->size = args->pitch * args->height; |
| 999 | |
Thomas Hellstrom | 294adf7 | 2014-02-27 12:34:51 +0100 | [diff] [blame] | 1000 | ret = ttm_read_lock(&dev_priv->reservation_sem, true); |
Thomas Hellstrom | d69d51d | 2013-11-28 00:28:30 -0800 | [diff] [blame] | 1001 | if (unlikely(ret != 0)) |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 1002 | return ret; |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 1003 | |
Thomas Hellstrom | d69d51d | 2013-11-28 00:28:30 -0800 | [diff] [blame] | 1004 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
| 1005 | args->size, false, &args->handle, |
| 1006 | &dma_buf); |
| 1007 | if (unlikely(ret != 0)) |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 1008 | goto out_no_dmabuf; |
| 1009 | |
Thomas Hellstrom | d69d51d | 2013-11-28 00:28:30 -0800 | [diff] [blame] | 1010 | vmw_dmabuf_unreference(&dma_buf); |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 1011 | out_no_dmabuf: |
Thomas Hellstrom | 294adf7 | 2014-02-27 12:34:51 +0100 | [diff] [blame] | 1012 | ttm_read_unlock(&dev_priv->reservation_sem); |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 1013 | return ret; |
| 1014 | } |
| 1015 | |
Thomas Hellstrom | d69d51d | 2013-11-28 00:28:30 -0800 | [diff] [blame] | 1016 | /** |
| 1017 | * vmw_dumb_map_offset - Return the address space offset of a dumb buffer |
| 1018 | * |
| 1019 | * @file_priv: Pointer to a struct drm_file identifying the caller. |
| 1020 | * @dev: Pointer to the drm device. |
| 1021 | * @handle: Handle identifying the dumb buffer. |
| 1022 | * @offset: The address space offset returned. |
| 1023 | * |
| 1024 | * This is a driver callback for the core drm dumb_map_offset functionality. |
| 1025 | */ |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 1026 | int vmw_dumb_map_offset(struct drm_file *file_priv, |
| 1027 | struct drm_device *dev, uint32_t handle, |
| 1028 | uint64_t *offset) |
| 1029 | { |
| 1030 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
| 1031 | struct vmw_dma_buffer *out_buf; |
| 1032 | int ret; |
| 1033 | |
| 1034 | ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf); |
| 1035 | if (ret != 0) |
| 1036 | return -EINVAL; |
| 1037 | |
David Herrmann | 72525b3 | 2013-07-24 21:08:53 +0200 | [diff] [blame] | 1038 | *offset = drm_vma_node_offset_addr(&out_buf->base.vma_node); |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 1039 | vmw_dmabuf_unreference(&out_buf); |
| 1040 | return 0; |
| 1041 | } |
| 1042 | |
Thomas Hellstrom | d69d51d | 2013-11-28 00:28:30 -0800 | [diff] [blame] | 1043 | /** |
| 1044 | * vmw_dumb_destroy - Destroy a dumb boffer |
| 1045 | * |
| 1046 | * @file_priv: Pointer to a struct drm_file identifying the caller. |
| 1047 | * @dev: Pointer to the drm device. |
| 1048 | * @handle: Handle identifying the dumb buffer. |
| 1049 | * |
| 1050 | * This is a driver callback for the core drm dumb_destroy functionality. |
| 1051 | */ |
Dave Airlie | 5e1782d | 2012-08-28 01:53:54 +0000 | [diff] [blame] | 1052 | int vmw_dumb_destroy(struct drm_file *file_priv, |
| 1053 | struct drm_device *dev, |
| 1054 | uint32_t handle) |
| 1055 | { |
| 1056 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, |
| 1057 | handle, TTM_REF_USAGE); |
| 1058 | } |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1059 | |
| 1060 | /** |
| 1061 | * vmw_resource_buf_alloc - Allocate a backup buffer for a resource. |
| 1062 | * |
| 1063 | * @res: The resource for which to allocate a backup buffer. |
| 1064 | * @interruptible: Whether any sleeps during allocation should be |
| 1065 | * performed while interruptible. |
| 1066 | */ |
| 1067 | static int vmw_resource_buf_alloc(struct vmw_resource *res, |
| 1068 | bool interruptible) |
| 1069 | { |
| 1070 | unsigned long size = |
| 1071 | (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK; |
| 1072 | struct vmw_dma_buffer *backup; |
| 1073 | int ret; |
| 1074 | |
| 1075 | if (likely(res->backup)) { |
| 1076 | BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size); |
| 1077 | return 0; |
| 1078 | } |
| 1079 | |
| 1080 | backup = kzalloc(sizeof(*backup), GFP_KERNEL); |
| 1081 | if (unlikely(backup == NULL)) |
| 1082 | return -ENOMEM; |
| 1083 | |
| 1084 | ret = vmw_dmabuf_init(res->dev_priv, backup, res->backup_size, |
| 1085 | res->func->backup_placement, |
| 1086 | interruptible, |
| 1087 | &vmw_dmabuf_bo_free); |
| 1088 | if (unlikely(ret != 0)) |
| 1089 | goto out_no_dmabuf; |
| 1090 | |
| 1091 | res->backup = backup; |
| 1092 | |
| 1093 | out_no_dmabuf: |
| 1094 | return ret; |
| 1095 | } |
| 1096 | |
| 1097 | /** |
| 1098 | * vmw_resource_do_validate - Make a resource up-to-date and visible |
| 1099 | * to the device. |
| 1100 | * |
| 1101 | * @res: The resource to make visible to the device. |
| 1102 | * @val_buf: Information about a buffer possibly |
| 1103 | * containing backup data if a bind operation is needed. |
| 1104 | * |
| 1105 | * On hardware resource shortage, this function returns -EBUSY and |
| 1106 | * should be retried once resources have been freed up. |
| 1107 | */ |
| 1108 | static int vmw_resource_do_validate(struct vmw_resource *res, |
| 1109 | struct ttm_validate_buffer *val_buf) |
| 1110 | { |
| 1111 | int ret = 0; |
| 1112 | const struct vmw_res_func *func = res->func; |
| 1113 | |
| 1114 | if (unlikely(res->id == -1)) { |
| 1115 | ret = func->create(res); |
| 1116 | if (unlikely(ret != 0)) |
| 1117 | return ret; |
| 1118 | } |
| 1119 | |
| 1120 | if (func->bind && |
| 1121 | ((func->needs_backup && list_empty(&res->mob_head) && |
| 1122 | val_buf->bo != NULL) || |
| 1123 | (!func->needs_backup && val_buf->bo != NULL))) { |
| 1124 | ret = func->bind(res, val_buf); |
| 1125 | if (unlikely(ret != 0)) |
| 1126 | goto out_bind_failed; |
| 1127 | if (func->needs_backup) |
| 1128 | list_add_tail(&res->mob_head, &res->backup->res_list); |
| 1129 | } |
| 1130 | |
| 1131 | /* |
| 1132 | * Only do this on write operations, and move to |
| 1133 | * vmw_resource_unreserve if it can be called after |
| 1134 | * backup buffers have been unreserved. Otherwise |
| 1135 | * sort out locking. |
| 1136 | */ |
| 1137 | res->res_dirty = true; |
| 1138 | |
| 1139 | return 0; |
| 1140 | |
| 1141 | out_bind_failed: |
| 1142 | func->destroy(res); |
| 1143 | |
| 1144 | return ret; |
| 1145 | } |
| 1146 | |
| 1147 | /** |
| 1148 | * vmw_resource_unreserve - Unreserve a resource previously reserved for |
| 1149 | * command submission. |
| 1150 | * |
| 1151 | * @res: Pointer to the struct vmw_resource to unreserve. |
| 1152 | * @new_backup: Pointer to new backup buffer if command submission |
| 1153 | * switched. |
| 1154 | * @new_backup_offset: New backup offset if @new_backup is !NULL. |
| 1155 | * |
| 1156 | * Currently unreserving a resource means putting it back on the device's |
| 1157 | * resource lru list, so that it can be evicted if necessary. |
| 1158 | */ |
| 1159 | void vmw_resource_unreserve(struct vmw_resource *res, |
| 1160 | struct vmw_dma_buffer *new_backup, |
| 1161 | unsigned long new_backup_offset) |
| 1162 | { |
| 1163 | struct vmw_private *dev_priv = res->dev_priv; |
| 1164 | |
| 1165 | if (!list_empty(&res->lru_head)) |
| 1166 | return; |
| 1167 | |
| 1168 | if (new_backup && new_backup != res->backup) { |
| 1169 | |
| 1170 | if (res->backup) { |
Maarten Lankhorst | 8bd4ce5 | 2013-06-27 13:48:27 +0200 | [diff] [blame] | 1171 | lockdep_assert_held(&res->backup->base.resv->lock.base); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1172 | list_del_init(&res->mob_head); |
| 1173 | vmw_dmabuf_unreference(&res->backup); |
| 1174 | } |
| 1175 | |
| 1176 | res->backup = vmw_dmabuf_reference(new_backup); |
Maarten Lankhorst | 8bd4ce5 | 2013-06-27 13:48:27 +0200 | [diff] [blame] | 1177 | lockdep_assert_held(&new_backup->base.resv->lock.base); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1178 | list_add_tail(&res->mob_head, &new_backup->res_list); |
| 1179 | } |
| 1180 | if (new_backup) |
| 1181 | res->backup_offset = new_backup_offset; |
| 1182 | |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1183 | if (!res->func->may_evict || res->id == -1 || res->pin_count) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1184 | return; |
| 1185 | |
| 1186 | write_lock(&dev_priv->resource_lock); |
| 1187 | list_add_tail(&res->lru_head, |
| 1188 | &res->dev_priv->res_lru[res->func->res_type]); |
| 1189 | write_unlock(&dev_priv->resource_lock); |
| 1190 | } |
| 1191 | |
| 1192 | /** |
| 1193 | * vmw_resource_check_buffer - Check whether a backup buffer is needed |
| 1194 | * for a resource and in that case, allocate |
| 1195 | * one, reserve and validate it. |
| 1196 | * |
| 1197 | * @res: The resource for which to allocate a backup buffer. |
| 1198 | * @interruptible: Whether any sleeps during allocation should be |
| 1199 | * performed while interruptible. |
| 1200 | * @val_buf: On successful return contains data about the |
| 1201 | * reserved and validated backup buffer. |
| 1202 | */ |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame] | 1203 | static int |
| 1204 | vmw_resource_check_buffer(struct vmw_resource *res, |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame] | 1205 | bool interruptible, |
| 1206 | struct ttm_validate_buffer *val_buf) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1207 | { |
| 1208 | struct list_head val_list; |
| 1209 | bool backup_dirty = false; |
| 1210 | int ret; |
| 1211 | |
| 1212 | if (unlikely(res->backup == NULL)) { |
| 1213 | ret = vmw_resource_buf_alloc(res, interruptible); |
| 1214 | if (unlikely(ret != 0)) |
| 1215 | return ret; |
| 1216 | } |
| 1217 | |
| 1218 | INIT_LIST_HEAD(&val_list); |
| 1219 | val_buf->bo = ttm_bo_reference(&res->backup->base); |
Christian König | ae9c0af | 2014-09-04 20:01:52 +0200 | [diff] [blame] | 1220 | val_buf->shared = false; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1221 | list_add_tail(&val_buf->head, &val_list); |
Christian König | aa35071 | 2014-12-03 15:46:48 +0100 | [diff] [blame] | 1222 | ret = ttm_eu_reserve_buffers(NULL, &val_list, interruptible, NULL); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1223 | if (unlikely(ret != 0)) |
| 1224 | goto out_no_reserve; |
| 1225 | |
| 1226 | if (res->func->needs_backup && list_empty(&res->mob_head)) |
| 1227 | return 0; |
| 1228 | |
| 1229 | backup_dirty = res->backup_dirty; |
| 1230 | ret = ttm_bo_validate(&res->backup->base, |
| 1231 | res->func->backup_placement, |
Maarten Lankhorst | 97a875c | 2012-11-28 11:25:44 +0000 | [diff] [blame] | 1232 | true, false); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1233 | |
| 1234 | if (unlikely(ret != 0)) |
| 1235 | goto out_no_validate; |
| 1236 | |
| 1237 | return 0; |
| 1238 | |
| 1239 | out_no_validate: |
Thomas Hellstrom | ac49251 | 2013-11-15 00:06:47 -0800 | [diff] [blame] | 1240 | ttm_eu_backoff_reservation(NULL, &val_list); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1241 | out_no_reserve: |
| 1242 | ttm_bo_unref(&val_buf->bo); |
| 1243 | if (backup_dirty) |
| 1244 | vmw_dmabuf_unreference(&res->backup); |
| 1245 | |
| 1246 | return ret; |
| 1247 | } |
| 1248 | |
| 1249 | /** |
| 1250 | * vmw_resource_reserve - Reserve a resource for command submission |
| 1251 | * |
| 1252 | * @res: The resource to reserve. |
| 1253 | * |
| 1254 | * This function takes the resource off the LRU list and make sure |
| 1255 | * a backup buffer is present for guest-backed resources. However, |
| 1256 | * the buffer may not be bound to the resource at this point. |
| 1257 | * |
| 1258 | */ |
Thomas Hellstrom | 1a4b172 | 2015-06-26 02:03:53 -0700 | [diff] [blame] | 1259 | int vmw_resource_reserve(struct vmw_resource *res, bool interruptible, |
| 1260 | bool no_backup) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1261 | { |
| 1262 | struct vmw_private *dev_priv = res->dev_priv; |
| 1263 | int ret; |
| 1264 | |
| 1265 | write_lock(&dev_priv->resource_lock); |
| 1266 | list_del_init(&res->lru_head); |
| 1267 | write_unlock(&dev_priv->resource_lock); |
| 1268 | |
| 1269 | if (res->func->needs_backup && res->backup == NULL && |
| 1270 | !no_backup) { |
Thomas Hellstrom | 1a4b172 | 2015-06-26 02:03:53 -0700 | [diff] [blame] | 1271 | ret = vmw_resource_buf_alloc(res, interruptible); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1272 | if (unlikely(ret != 0)) |
| 1273 | return ret; |
| 1274 | } |
| 1275 | |
| 1276 | return 0; |
| 1277 | } |
| 1278 | |
| 1279 | /** |
| 1280 | * vmw_resource_backoff_reservation - Unreserve and unreference a |
| 1281 | * backup buffer |
| 1282 | *. |
| 1283 | * @val_buf: Backup buffer information. |
| 1284 | */ |
Maarten Lankhorst | ecff665 | 2013-06-27 13:48:17 +0200 | [diff] [blame] | 1285 | static void |
Thomas Hellstrom | ac49251 | 2013-11-15 00:06:47 -0800 | [diff] [blame] | 1286 | vmw_resource_backoff_reservation(struct ttm_validate_buffer *val_buf) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1287 | { |
| 1288 | struct list_head val_list; |
| 1289 | |
| 1290 | if (likely(val_buf->bo == NULL)) |
| 1291 | return; |
| 1292 | |
| 1293 | INIT_LIST_HEAD(&val_list); |
| 1294 | list_add_tail(&val_buf->head, &val_list); |
Thomas Hellstrom | ac49251 | 2013-11-15 00:06:47 -0800 | [diff] [blame] | 1295 | ttm_eu_backoff_reservation(NULL, &val_list); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1296 | ttm_bo_unref(&val_buf->bo); |
| 1297 | } |
| 1298 | |
| 1299 | /** |
| 1300 | * vmw_resource_do_evict - Evict a resource, and transfer its data |
| 1301 | * to a backup buffer. |
| 1302 | * |
| 1303 | * @res: The resource to evict. |
Thomas Hellstrom | ea029c2 | 2013-11-12 00:09:54 -0800 | [diff] [blame] | 1304 | * @interruptible: Whether to wait interruptible. |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1305 | */ |
Thomas Hellstrom | b9eb1a6 | 2015-04-02 02:39:45 -0700 | [diff] [blame^] | 1306 | static int vmw_resource_do_evict(struct vmw_resource *res, bool interruptible) |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1307 | { |
| 1308 | struct ttm_validate_buffer val_buf; |
| 1309 | const struct vmw_res_func *func = res->func; |
| 1310 | int ret; |
| 1311 | |
| 1312 | BUG_ON(!func->may_evict); |
| 1313 | |
| 1314 | val_buf.bo = NULL; |
Christian König | ae9c0af | 2014-09-04 20:01:52 +0200 | [diff] [blame] | 1315 | val_buf.shared = false; |
Thomas Hellstrom | ac49251 | 2013-11-15 00:06:47 -0800 | [diff] [blame] | 1316 | ret = vmw_resource_check_buffer(res, interruptible, &val_buf); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1317 | if (unlikely(ret != 0)) |
| 1318 | return ret; |
| 1319 | |
| 1320 | if (unlikely(func->unbind != NULL && |
| 1321 | (!func->needs_backup || !list_empty(&res->mob_head)))) { |
| 1322 | ret = func->unbind(res, res->res_dirty, &val_buf); |
| 1323 | if (unlikely(ret != 0)) |
| 1324 | goto out_no_unbind; |
| 1325 | list_del_init(&res->mob_head); |
| 1326 | } |
| 1327 | ret = func->destroy(res); |
| 1328 | res->backup_dirty = true; |
| 1329 | res->res_dirty = false; |
| 1330 | out_no_unbind: |
Thomas Hellstrom | ac49251 | 2013-11-15 00:06:47 -0800 | [diff] [blame] | 1331 | vmw_resource_backoff_reservation(&val_buf); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1332 | |
| 1333 | return ret; |
| 1334 | } |
| 1335 | |
| 1336 | |
| 1337 | /** |
| 1338 | * vmw_resource_validate - Make a resource up-to-date and visible |
| 1339 | * to the device. |
| 1340 | * |
| 1341 | * @res: The resource to make visible to the device. |
| 1342 | * |
| 1343 | * On succesful return, any backup DMA buffer pointed to by @res->backup will |
| 1344 | * be reserved and validated. |
| 1345 | * On hardware resource shortage, this function will repeatedly evict |
| 1346 | * resources of the same type until the validation succeeds. |
| 1347 | */ |
| 1348 | int vmw_resource_validate(struct vmw_resource *res) |
| 1349 | { |
| 1350 | int ret; |
| 1351 | struct vmw_resource *evict_res; |
| 1352 | struct vmw_private *dev_priv = res->dev_priv; |
| 1353 | struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type]; |
| 1354 | struct ttm_validate_buffer val_buf; |
Thomas Hellstrom | ea029c2 | 2013-11-12 00:09:54 -0800 | [diff] [blame] | 1355 | unsigned err_count = 0; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1356 | |
| 1357 | if (likely(!res->func->may_evict)) |
| 1358 | return 0; |
| 1359 | |
| 1360 | val_buf.bo = NULL; |
Christian König | ae9c0af | 2014-09-04 20:01:52 +0200 | [diff] [blame] | 1361 | val_buf.shared = false; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1362 | if (res->backup) |
| 1363 | val_buf.bo = &res->backup->base; |
| 1364 | do { |
| 1365 | ret = vmw_resource_do_validate(res, &val_buf); |
| 1366 | if (likely(ret != -EBUSY)) |
| 1367 | break; |
| 1368 | |
| 1369 | write_lock(&dev_priv->resource_lock); |
| 1370 | if (list_empty(lru_list) || !res->func->may_evict) { |
Thomas Hellstrom | ea029c2 | 2013-11-12 00:09:54 -0800 | [diff] [blame] | 1371 | DRM_ERROR("Out of device device resources " |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1372 | "for %s.\n", res->func->type_name); |
| 1373 | ret = -EBUSY; |
| 1374 | write_unlock(&dev_priv->resource_lock); |
| 1375 | break; |
| 1376 | } |
| 1377 | |
| 1378 | evict_res = vmw_resource_reference |
| 1379 | (list_first_entry(lru_list, struct vmw_resource, |
| 1380 | lru_head)); |
| 1381 | list_del_init(&evict_res->lru_head); |
| 1382 | |
| 1383 | write_unlock(&dev_priv->resource_lock); |
Thomas Hellstrom | ea029c2 | 2013-11-12 00:09:54 -0800 | [diff] [blame] | 1384 | |
| 1385 | ret = vmw_resource_do_evict(evict_res, true); |
| 1386 | if (unlikely(ret != 0)) { |
| 1387 | write_lock(&dev_priv->resource_lock); |
| 1388 | list_add_tail(&evict_res->lru_head, lru_list); |
| 1389 | write_unlock(&dev_priv->resource_lock); |
| 1390 | if (ret == -ERESTARTSYS || |
| 1391 | ++err_count > VMW_RES_EVICT_ERR_COUNT) { |
| 1392 | vmw_resource_unreference(&evict_res); |
| 1393 | goto out_no_validate; |
| 1394 | } |
| 1395 | } |
| 1396 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1397 | vmw_resource_unreference(&evict_res); |
| 1398 | } while (1); |
| 1399 | |
| 1400 | if (unlikely(ret != 0)) |
| 1401 | goto out_no_validate; |
| 1402 | else if (!res->func->needs_backup && res->backup) { |
| 1403 | list_del_init(&res->mob_head); |
| 1404 | vmw_dmabuf_unreference(&res->backup); |
| 1405 | } |
| 1406 | |
| 1407 | return 0; |
| 1408 | |
| 1409 | out_no_validate: |
| 1410 | return ret; |
| 1411 | } |
| 1412 | |
| 1413 | /** |
| 1414 | * vmw_fence_single_bo - Utility function to fence a single TTM buffer |
| 1415 | * object without unreserving it. |
| 1416 | * |
| 1417 | * @bo: Pointer to the struct ttm_buffer_object to fence. |
| 1418 | * @fence: Pointer to the fence. If NULL, this function will |
| 1419 | * insert a fence into the command stream.. |
| 1420 | * |
| 1421 | * Contrary to the ttm_eu version of this function, it takes only |
| 1422 | * a single buffer object instead of a list, and it also doesn't |
| 1423 | * unreserve the buffer object, which needs to be done separately. |
| 1424 | */ |
| 1425 | void vmw_fence_single_bo(struct ttm_buffer_object *bo, |
| 1426 | struct vmw_fence_obj *fence) |
| 1427 | { |
| 1428 | struct ttm_bo_device *bdev = bo->bdev; |
Maarten Lankhorst | f2c24b8 | 2014-04-02 17:14:48 +0200 | [diff] [blame] | 1429 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1430 | struct vmw_private *dev_priv = |
| 1431 | container_of(bdev, struct vmw_private, bdev); |
| 1432 | |
Maarten Lankhorst | 2298e80 | 2014-03-26 14:07:44 +0100 | [diff] [blame] | 1433 | if (fence == NULL) { |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1434 | vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); |
Maarten Lankhorst | f2c24b8 | 2014-04-02 17:14:48 +0200 | [diff] [blame] | 1435 | reservation_object_add_excl_fence(bo->resv, &fence->base); |
| 1436 | fence_put(&fence->base); |
Maarten Lankhorst | 2298e80 | 2014-03-26 14:07:44 +0100 | [diff] [blame] | 1437 | } else |
Maarten Lankhorst | f2c24b8 | 2014-04-02 17:14:48 +0200 | [diff] [blame] | 1438 | reservation_object_add_excl_fence(bo->resv, &fence->base); |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1439 | } |
| 1440 | |
| 1441 | /** |
| 1442 | * vmw_resource_move_notify - TTM move_notify_callback |
| 1443 | * |
| 1444 | * @bo: The TTM buffer object about to move. |
| 1445 | * @mem: The truct ttm_mem_reg indicating to what memory |
| 1446 | * region the move is taking place. |
| 1447 | * |
Thomas Hellstrom | f468911 | 2012-11-21 11:29:13 +0100 | [diff] [blame] | 1448 | * Evicts the Guest Backed hardware resource if the backup |
| 1449 | * buffer is being moved out of MOB memory. |
| 1450 | * Note that this function should not race with the resource |
| 1451 | * validation code as long as it accesses only members of struct |
| 1452 | * resource that remain static while bo::res is !NULL and |
| 1453 | * while we have @bo reserved. struct resource::backup is *not* a |
| 1454 | * static member. The resource validation code will take care |
| 1455 | * to set @bo::res to NULL, while having @bo reserved when the |
| 1456 | * buffer is no longer bound to the resource, so @bo:res can be |
| 1457 | * used to determine whether there is a need to unbind and whether |
| 1458 | * it is safe to unbind. |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1459 | */ |
| 1460 | void vmw_resource_move_notify(struct ttm_buffer_object *bo, |
| 1461 | struct ttm_mem_reg *mem) |
| 1462 | { |
Thomas Hellstrom | f468911 | 2012-11-21 11:29:13 +0100 | [diff] [blame] | 1463 | struct vmw_dma_buffer *dma_buf; |
| 1464 | |
| 1465 | if (mem == NULL) |
| 1466 | return; |
| 1467 | |
| 1468 | if (bo->destroy != vmw_dmabuf_bo_free && |
| 1469 | bo->destroy != vmw_user_dmabuf_destroy) |
| 1470 | return; |
| 1471 | |
| 1472 | dma_buf = container_of(bo, struct vmw_dma_buffer, base); |
| 1473 | |
| 1474 | if (mem->mem_type != VMW_PL_MOB) { |
| 1475 | struct vmw_resource *res, *n; |
Thomas Hellstrom | f468911 | 2012-11-21 11:29:13 +0100 | [diff] [blame] | 1476 | struct ttm_validate_buffer val_buf; |
| 1477 | |
| 1478 | val_buf.bo = bo; |
Christian König | ae9c0af | 2014-09-04 20:01:52 +0200 | [diff] [blame] | 1479 | val_buf.shared = false; |
Thomas Hellstrom | f468911 | 2012-11-21 11:29:13 +0100 | [diff] [blame] | 1480 | |
| 1481 | list_for_each_entry_safe(res, n, &dma_buf->res_list, mob_head) { |
| 1482 | |
| 1483 | if (unlikely(res->func->unbind == NULL)) |
| 1484 | continue; |
| 1485 | |
| 1486 | (void) res->func->unbind(res, true, &val_buf); |
| 1487 | res->backup_dirty = true; |
| 1488 | res->res_dirty = false; |
| 1489 | list_del_init(&res->mob_head); |
| 1490 | } |
| 1491 | |
Thomas Hellstrom | f468911 | 2012-11-21 11:29:13 +0100 | [diff] [blame] | 1492 | (void) ttm_bo_wait(bo, false, false, false); |
Thomas Hellstrom | f468911 | 2012-11-21 11:29:13 +0100 | [diff] [blame] | 1493 | } |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1494 | } |
| 1495 | |
| 1496 | /** |
| 1497 | * vmw_resource_needs_backup - Return whether a resource needs a backup buffer. |
| 1498 | * |
| 1499 | * @res: The resource being queried. |
| 1500 | */ |
| 1501 | bool vmw_resource_needs_backup(const struct vmw_resource *res) |
| 1502 | { |
| 1503 | return res->func->needs_backup; |
| 1504 | } |
| 1505 | |
| 1506 | /** |
| 1507 | * vmw_resource_evict_type - Evict all resources of a specific type |
| 1508 | * |
| 1509 | * @dev_priv: Pointer to a device private struct |
| 1510 | * @type: The resource type to evict |
| 1511 | * |
| 1512 | * To avoid thrashing starvation or as part of the hibernation sequence, |
Thomas Hellstrom | ea029c2 | 2013-11-12 00:09:54 -0800 | [diff] [blame] | 1513 | * try to evict all evictable resources of a specific type. |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1514 | */ |
| 1515 | static void vmw_resource_evict_type(struct vmw_private *dev_priv, |
| 1516 | enum vmw_res_type type) |
| 1517 | { |
| 1518 | struct list_head *lru_list = &dev_priv->res_lru[type]; |
| 1519 | struct vmw_resource *evict_res; |
Thomas Hellstrom | ea029c2 | 2013-11-12 00:09:54 -0800 | [diff] [blame] | 1520 | unsigned err_count = 0; |
| 1521 | int ret; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1522 | |
| 1523 | do { |
| 1524 | write_lock(&dev_priv->resource_lock); |
| 1525 | |
| 1526 | if (list_empty(lru_list)) |
| 1527 | goto out_unlock; |
| 1528 | |
| 1529 | evict_res = vmw_resource_reference( |
| 1530 | list_first_entry(lru_list, struct vmw_resource, |
| 1531 | lru_head)); |
| 1532 | list_del_init(&evict_res->lru_head); |
| 1533 | write_unlock(&dev_priv->resource_lock); |
Thomas Hellstrom | ea029c2 | 2013-11-12 00:09:54 -0800 | [diff] [blame] | 1534 | |
| 1535 | ret = vmw_resource_do_evict(evict_res, false); |
| 1536 | if (unlikely(ret != 0)) { |
| 1537 | write_lock(&dev_priv->resource_lock); |
| 1538 | list_add_tail(&evict_res->lru_head, lru_list); |
| 1539 | write_unlock(&dev_priv->resource_lock); |
| 1540 | if (++err_count > VMW_RES_EVICT_ERR_COUNT) { |
| 1541 | vmw_resource_unreference(&evict_res); |
| 1542 | return; |
| 1543 | } |
| 1544 | } |
| 1545 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 1546 | vmw_resource_unreference(&evict_res); |
| 1547 | } while (1); |
| 1548 | |
| 1549 | out_unlock: |
| 1550 | write_unlock(&dev_priv->resource_lock); |
| 1551 | } |
| 1552 | |
| 1553 | /** |
| 1554 | * vmw_resource_evict_all - Evict all evictable resources |
| 1555 | * |
| 1556 | * @dev_priv: Pointer to a device private struct |
| 1557 | * |
| 1558 | * To avoid thrashing starvation or as part of the hibernation sequence, |
| 1559 | * evict all evictable resources. In particular this means that all |
| 1560 | * guest-backed resources that are registered with the device are |
| 1561 | * evicted and the OTable becomes clean. |
| 1562 | */ |
| 1563 | void vmw_resource_evict_all(struct vmw_private *dev_priv) |
| 1564 | { |
| 1565 | enum vmw_res_type type; |
| 1566 | |
| 1567 | mutex_lock(&dev_priv->cmdbuf_mutex); |
| 1568 | |
| 1569 | for (type = 0; type < vmw_res_max; ++type) |
| 1570 | vmw_resource_evict_type(dev_priv, type); |
| 1571 | |
| 1572 | mutex_unlock(&dev_priv->cmdbuf_mutex); |
| 1573 | } |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1574 | |
| 1575 | /** |
| 1576 | * vmw_resource_pin - Add a pin reference on a resource |
| 1577 | * |
| 1578 | * @res: The resource to add a pin reference on |
| 1579 | * |
| 1580 | * This function adds a pin reference, and if needed validates the resource. |
| 1581 | * Having a pin reference means that the resource can never be evicted, and |
| 1582 | * its id will never change as long as there is a pin reference. |
| 1583 | * This function returns 0 on success and a negative error code on failure. |
| 1584 | */ |
Thomas Hellstrom | 1a4b172 | 2015-06-26 02:03:53 -0700 | [diff] [blame] | 1585 | int vmw_resource_pin(struct vmw_resource *res, bool interruptible) |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1586 | { |
| 1587 | struct vmw_private *dev_priv = res->dev_priv; |
| 1588 | int ret; |
| 1589 | |
Thomas Hellstrom | 1a4b172 | 2015-06-26 02:03:53 -0700 | [diff] [blame] | 1590 | ttm_write_lock(&dev_priv->reservation_sem, interruptible); |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1591 | mutex_lock(&dev_priv->cmdbuf_mutex); |
Thomas Hellstrom | 1a4b172 | 2015-06-26 02:03:53 -0700 | [diff] [blame] | 1592 | ret = vmw_resource_reserve(res, interruptible, false); |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1593 | if (ret) |
| 1594 | goto out_no_reserve; |
| 1595 | |
| 1596 | if (res->pin_count == 0) { |
Thomas Hellstrom | 459d0fa | 2015-06-26 00:25:37 -0700 | [diff] [blame] | 1597 | struct vmw_dma_buffer *vbo = NULL; |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1598 | |
| 1599 | if (res->backup) { |
Thomas Hellstrom | 459d0fa | 2015-06-26 00:25:37 -0700 | [diff] [blame] | 1600 | vbo = res->backup; |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1601 | |
Thomas Hellstrom | 1a4b172 | 2015-06-26 02:03:53 -0700 | [diff] [blame] | 1602 | ttm_bo_reserve(&vbo->base, interruptible, false, false, |
| 1603 | NULL); |
Thomas Hellstrom | 459d0fa | 2015-06-26 00:25:37 -0700 | [diff] [blame] | 1604 | if (!vbo->pin_count) { |
| 1605 | ret = ttm_bo_validate |
| 1606 | (&vbo->base, |
| 1607 | res->func->backup_placement, |
Thomas Hellstrom | 1a4b172 | 2015-06-26 02:03:53 -0700 | [diff] [blame] | 1608 | interruptible, false); |
Thomas Hellstrom | 459d0fa | 2015-06-26 00:25:37 -0700 | [diff] [blame] | 1609 | if (ret) { |
| 1610 | ttm_bo_unreserve(&vbo->base); |
| 1611 | goto out_no_validate; |
| 1612 | } |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1613 | } |
| 1614 | |
| 1615 | /* Do we really need to pin the MOB as well? */ |
Thomas Hellstrom | 459d0fa | 2015-06-26 00:25:37 -0700 | [diff] [blame] | 1616 | vmw_bo_pin_reserved(vbo, true); |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1617 | } |
| 1618 | ret = vmw_resource_validate(res); |
Thomas Hellstrom | 459d0fa | 2015-06-26 00:25:37 -0700 | [diff] [blame] | 1619 | if (vbo) |
| 1620 | ttm_bo_unreserve(&vbo->base); |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1621 | if (ret) |
| 1622 | goto out_no_validate; |
| 1623 | } |
| 1624 | res->pin_count++; |
| 1625 | |
| 1626 | out_no_validate: |
| 1627 | vmw_resource_unreserve(res, NULL, 0UL); |
| 1628 | out_no_reserve: |
| 1629 | mutex_unlock(&dev_priv->cmdbuf_mutex); |
| 1630 | ttm_write_unlock(&dev_priv->reservation_sem); |
| 1631 | |
| 1632 | return ret; |
| 1633 | } |
| 1634 | |
| 1635 | /** |
| 1636 | * vmw_resource_unpin - Remove a pin reference from a resource |
| 1637 | * |
| 1638 | * @res: The resource to remove a pin reference from |
| 1639 | * |
| 1640 | * Having a pin reference means that the resource can never be evicted, and |
| 1641 | * its id will never change as long as there is a pin reference. |
| 1642 | */ |
| 1643 | void vmw_resource_unpin(struct vmw_resource *res) |
| 1644 | { |
| 1645 | struct vmw_private *dev_priv = res->dev_priv; |
| 1646 | int ret; |
| 1647 | |
| 1648 | ttm_read_lock(&dev_priv->reservation_sem, false); |
| 1649 | mutex_lock(&dev_priv->cmdbuf_mutex); |
| 1650 | |
Thomas Hellstrom | 1a4b172 | 2015-06-26 02:03:53 -0700 | [diff] [blame] | 1651 | ret = vmw_resource_reserve(res, false, true); |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1652 | WARN_ON(ret); |
| 1653 | |
| 1654 | WARN_ON(res->pin_count == 0); |
| 1655 | if (--res->pin_count == 0 && res->backup) { |
Thomas Hellstrom | 459d0fa | 2015-06-26 00:25:37 -0700 | [diff] [blame] | 1656 | struct vmw_dma_buffer *vbo = res->backup; |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1657 | |
Thomas Hellstrom | 459d0fa | 2015-06-26 00:25:37 -0700 | [diff] [blame] | 1658 | ttm_bo_reserve(&vbo->base, false, false, false, NULL); |
| 1659 | vmw_bo_pin_reserved(vbo, false); |
| 1660 | ttm_bo_unreserve(&vbo->base); |
Thomas Hellstrom | ed93394 | 2015-03-02 23:26:06 -0800 | [diff] [blame] | 1661 | } |
| 1662 | |
| 1663 | vmw_resource_unreserve(res, NULL, 0UL); |
| 1664 | |
| 1665 | mutex_unlock(&dev_priv->cmdbuf_mutex); |
| 1666 | ttm_read_unlock(&dev_priv->reservation_sem); |
| 1667 | } |