1 // SPDX-License-Identifier: GPL-2.0 OR MIT 2 /************************************************************************** 3 * 4 * Copyright 2012-2016 VMware, Inc., Palo Alto, CA., USA 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24 * USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 #include "vmwgfx_drv.h" 29 #include "vmwgfx_resource_priv.h" 30 31 /** 32 * struct vmw_stream - Overlay stream simple resource. 33 * @sres: The simple resource we derive from. 34 * @stream_id: The overlay stream id. 35 */ 36 struct vmw_stream { 37 struct vmw_simple_resource sres; 38 u32 stream_id; 39 }; 40 41 /** 42 * vmw_stream - Typecast a struct vmw_resource to a struct vmw_stream. 43 * @res: Pointer to the struct vmw_resource. 44 * 45 * Returns: Returns a pointer to the struct vmw_stream. 46 */ 47 static struct vmw_stream * 48 vmw_stream(struct vmw_resource *res) 49 { 50 return container_of(res, struct vmw_stream, sres.res); 51 } 52 53 /*************************************************************************** 54 * Simple resource callbacks for struct vmw_stream 55 **************************************************************************/ 56 static void vmw_stream_hw_destroy(struct vmw_resource *res) 57 { 58 struct vmw_private *dev_priv = res->dev_priv; 59 struct vmw_stream *stream = vmw_stream(res); 60 int ret; 61 62 ret = vmw_overlay_unref(dev_priv, stream->stream_id); 63 WARN_ON_ONCE(ret != 0); 64 } 65 66 static int vmw_stream_init(struct vmw_resource *res, void *data) 67 { 68 struct vmw_stream *stream = vmw_stream(res); 69 70 return vmw_overlay_claim(res->dev_priv, &stream->stream_id); 71 } 72 73 static void vmw_stream_set_arg_handle(void *data, u32 handle) 74 { 75 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; 76 77 arg->stream_id = handle; 78 } 79 80 static const struct vmw_simple_resource_func va_stream_func = { 81 .res_func = { 82 .res_type = vmw_res_stream, 83 .needs_backup = false, 84 .may_evict = false, 85 .type_name = "overlay stream", 86 .backup_placement = NULL, 87 .create = NULL, 88 .destroy = NULL, 89 .bind = NULL, 90 .unbind = NULL 91 }, 92 .ttm_res_type = VMW_RES_STREAM, 93 .size = sizeof(struct vmw_stream), 94 .init = vmw_stream_init, 95 .hw_destroy = vmw_stream_hw_destroy, 96 .set_arg_handle = vmw_stream_set_arg_handle, 97 }; 98 99 /*************************************************************************** 100 * End simple resource callbacks for struct vmw_stream 101 **************************************************************************/ 102 103 /** 104 * vmw_stream_unref_ioctl - Ioctl to unreference a user-space handle to 105 * a struct vmw_stream. 106 * @dev: Pointer to the drm device. 107 * @data: The ioctl argument 108 * @file_priv: Pointer to a struct drm_file identifying the caller. 109 * 110 * Return: 111 * 0 if successful. 112 * Negative error value on failure. 113 */ 114 int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, 115 struct drm_file *file_priv) 116 { 117 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; 118 119 return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, 120 arg->stream_id, TTM_REF_USAGE); 121 } 122 123 /** 124 * vmw_stream_claim_ioctl - Ioctl to claim a struct vmw_stream overlay. 125 * @dev: Pointer to the drm device. 126 * @data: The ioctl argument 127 * @file_priv: Pointer to a struct drm_file identifying the caller. 128 * 129 * Return: 130 * 0 if successful. 131 * Negative error value on failure. 132 */ 133 int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, 134 struct drm_file *file_priv) 135 { 136 return vmw_simple_resource_create_ioctl(dev, data, file_priv, 137 &va_stream_func); 138 } 139 140 /** 141 * vmw_user_stream_lookup - Look up a struct vmw_user_stream from a handle. 142 * @dev_priv: Pointer to a struct vmw_private. 143 * @tfile: struct ttm_object_file identifying the caller. 144 * @inout_id: In: The user-space handle. Out: The stream id. 145 * @out: On output contains a refcounted pointer to the embedded 146 * struct vmw_resource. 147 * 148 * Return: 149 * 0 if successful. 150 * Negative error value on failure. 151 */ 152 int vmw_user_stream_lookup(struct vmw_private *dev_priv, 153 struct ttm_object_file *tfile, 154 uint32_t *inout_id, struct vmw_resource **out) 155 { 156 struct vmw_stream *stream; 157 struct vmw_resource *res = 158 vmw_simple_resource_lookup(tfile, *inout_id, &va_stream_func); 159 160 if (IS_ERR(res)) 161 return PTR_ERR(res); 162 163 stream = vmw_stream(res); 164 *inout_id = stream->stream_id; 165 *out = res; 166 167 return 0; 168 } 169