1 /**************************************************************************
3 * Copyright © 2016 VMware, Inc., Palo Alto, CA., USA
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
28 #include "vmwgfx_drv.h"
29 #include "vmwgfx_resource_priv.h"
32 * struct vmw_user_simple_resource - User-space simple resource struct
34 * @base: The TTM base object implementing user-space visibility.
35 * @account_size: How much memory was accounted for this object.
36 * @simple: The embedded struct vmw_simple_resource.
38 struct vmw_user_simple_resource {
39 struct ttm_base_object base;
41 struct vmw_simple_resource simple;
43 * Nothing to be placed after @simple, since size of @simple is
50 * vmw_simple_resource_init - Initialize a simple resource object.
52 * @dev_priv: Pointer to a struct device private.
53 * @simple: The struct vmw_simple_resource to initialize.
54 * @data: Data passed to the information initialization function.
55 * @res_free: Function pointer to destroy the simple resource.
59 * Negative error value if error, in which case the resource will have been
62 static int vmw_simple_resource_init(struct vmw_private *dev_priv,
63 struct vmw_simple_resource *simple,
65 void (*res_free)(struct vmw_resource *res))
67 struct vmw_resource *res = &simple->res;
70 ret = vmw_resource_init(dev_priv, res, false, res_free,
71 &simple->func->res_func);
78 ret = simple->func->init(res, data);
80 vmw_resource_unreference(&res);
84 vmw_resource_activate(&simple->res, simple->func->hw_destroy);
90 * vmw_simple_resource_free - Free a simple resource object.
92 * @res: The struct vmw_resource member of the simple resource object.
94 * Frees memory and memory accounting for the object.
96 static void vmw_simple_resource_free(struct vmw_resource *res)
98 struct vmw_user_simple_resource *usimple =
99 container_of(res, struct vmw_user_simple_resource,
101 struct vmw_private *dev_priv = res->dev_priv;
102 size_t size = usimple->account_size;
104 ttm_base_object_kfree(usimple, base);
105 ttm_mem_global_free(vmw_mem_glob(dev_priv), size);
109 * vmw_simple_resource_base_release - TTM object release callback
111 * @p_base: The struct ttm_base_object member of the simple resource object.
113 * Called when the last reference to the embedded struct ttm_base_object is
114 * gone. Typically results in an object free, unless there are other
115 * references to the embedded struct vmw_resource.
117 static void vmw_simple_resource_base_release(struct ttm_base_object **p_base)
119 struct ttm_base_object *base = *p_base;
120 struct vmw_user_simple_resource *usimple =
121 container_of(base, struct vmw_user_simple_resource, base);
122 struct vmw_resource *res = &usimple->simple.res;
125 vmw_resource_unreference(&res);
129 * vmw_simple_resource_create_ioctl - Helper to set up an ioctl function to
130 * create a struct vmw_simple_resource.
132 * @dev: Pointer to a struct drm device.
133 * @data: Ioctl argument.
134 * @file_priv: Pointer to a struct drm_file identifying the caller.
135 * @func: Pointer to a struct vmw_simple_resource_func identifying the
136 * simple resource type.
140 * Negative error value on error.
143 vmw_simple_resource_create_ioctl(struct drm_device *dev, void *data,
144 struct drm_file *file_priv,
145 const struct vmw_simple_resource_func *func)
147 struct vmw_private *dev_priv = vmw_priv(dev);
148 struct vmw_user_simple_resource *usimple;
149 struct vmw_resource *res;
150 struct vmw_resource *tmp;
151 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
156 alloc_size = offsetof(struct vmw_user_simple_resource, simple) +
158 account_size = ttm_round_pot(alloc_size) + VMW_IDA_ACC_SIZE;
160 ret = ttm_read_lock(&dev_priv->reservation_sem, true);
164 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), account_size,
166 ttm_read_unlock(&dev_priv->reservation_sem);
168 if (ret != -ERESTARTSYS)
169 DRM_ERROR("Out of graphics memory for %s"
170 " creation.\n", func->res_func.type_name);
175 usimple = kzalloc(alloc_size, GFP_KERNEL);
177 ttm_mem_global_free(vmw_mem_glob(dev_priv),
183 usimple->simple.func = func;
184 usimple->account_size = account_size;
185 res = &usimple->simple.res;
186 usimple->base.shareable = false;
187 usimple->base.tfile = NULL;
190 * From here on, the destructor takes over resource freeing.
192 ret = vmw_simple_resource_init(dev_priv, &usimple->simple,
193 data, vmw_simple_resource_free);
197 tmp = vmw_resource_reference(res);
198 ret = ttm_base_object_init(tfile, &usimple->base, false,
200 &vmw_simple_resource_base_release, NULL);
203 vmw_resource_unreference(&tmp);
207 func->set_arg_handle(data, usimple->base.hash.key);
209 vmw_resource_unreference(&res);
215 * vmw_simple_resource_lookup - Look up a simple resource from its user-space
218 * @tfile: struct ttm_object_file identifying the caller.
219 * @handle: The user-space handle.
220 * @func: The struct vmw_simple_resource_func identifying the simple resource
223 * Returns: Refcounted pointer to the embedded struct vmw_resource if
224 * successfule. Error pointer otherwise.
226 struct vmw_resource *
227 vmw_simple_resource_lookup(struct ttm_object_file *tfile,
229 const struct vmw_simple_resource_func *func)
231 struct vmw_user_simple_resource *usimple;
232 struct ttm_base_object *base;
233 struct vmw_resource *res;
235 base = ttm_base_object_lookup(tfile, handle);
237 DRM_ERROR("Invalid %s handle 0x%08lx.\n",
238 func->res_func.type_name,
239 (unsigned long) handle);
240 return ERR_PTR(-ESRCH);
243 if (ttm_base_object_type(base) != func->ttm_res_type) {
244 ttm_base_object_unref(&base);
245 DRM_ERROR("Invalid type of %s handle 0x%08lx.\n",
246 func->res_func.type_name,
247 (unsigned long) handle);
248 return ERR_PTR(-EINVAL);
251 usimple = container_of(base, typeof(*usimple), base);
252 res = vmw_resource_reference(&usimple->simple.res);
253 ttm_base_object_unref(&base);