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_bo.h" 29 #include "vmwgfx_drv.h" 30 #include "vmwgfx_resource_priv.h" 31 32 /** 33 * struct vmw_stream - Overlay stream simple resource. 34 * @sres: The simple resource we derive from. 35 * @stream_id: The overlay stream id. 36 */ 37 struct vmw_stream { 38 struct vmw_simple_resource sres; 39 u32 stream_id; 40 }; 41 42 /** 43 * vmw_stream - Typecast a struct vmw_resource to a struct vmw_stream. 44 * @res: Pointer to the struct vmw_resource. 45 * 46 * Returns: Returns a pointer to the struct vmw_stream. 47 */ 48 static struct vmw_stream * 49 vmw_stream(struct vmw_resource *res) 50 { 51 return container_of(res, struct vmw_stream, sres.res); 52 } 53 54 /*************************************************************************** 55 * Simple resource callbacks for struct vmw_stream 56 **************************************************************************/ 57 static void vmw_stream_hw_destroy(struct vmw_resource *res) 58 { 59 struct vmw_private *dev_priv = res->dev_priv; 60 struct vmw_stream *stream = vmw_stream(res); 61 int ret; 62 63 ret = vmw_overlay_unref(dev_priv, stream->stream_id); 64 WARN_ON_ONCE(ret != 0); 65 } 66 67 static int vmw_stream_init(struct vmw_resource *res, void *data) 68 { 69 struct vmw_stream *stream = vmw_stream(res); 70 71 return vmw_overlay_claim(res->dev_priv, &stream->stream_id); 72 } 73 74 static void vmw_stream_set_arg_handle(void *data, u32 handle) 75 { 76 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; 77 78 arg->stream_id = handle; 79 } 80 81 static const struct vmw_simple_resource_func va_stream_func = { 82 .res_func = { 83 .res_type = vmw_res_stream, 84 .needs_guest_memory = false, 85 .may_evict = false, 86 .type_name = "overlay stream", 87 .domain = VMW_BO_DOMAIN_SYS, 88 .busy_domain = VMW_BO_DOMAIN_SYS, 89 .create = NULL, 90 .destroy = NULL, 91 .bind = NULL, 92 .unbind = NULL 93 }, 94 .ttm_res_type = VMW_RES_STREAM, 95 .size = sizeof(struct vmw_stream), 96 .init = vmw_stream_init, 97 .hw_destroy = vmw_stream_hw_destroy, 98 .set_arg_handle = vmw_stream_set_arg_handle, 99 }; 100 101 /*************************************************************************** 102 * End simple resource callbacks for struct vmw_stream 103 **************************************************************************/ 104 105 /** 106 * vmw_stream_unref_ioctl - Ioctl to unreference a user-space handle to 107 * a struct vmw_stream. 108 * @dev: Pointer to the drm device. 109 * @data: The ioctl argument 110 * @file_priv: Pointer to a struct drm_file identifying the caller. 111 * 112 * Return: 113 * 0 if successful. 114 * Negative error value on failure. 115 */ 116 int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, 117 struct drm_file *file_priv) 118 { 119 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; 120 121 return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, 122 arg->stream_id); 123 } 124 125 /** 126 * vmw_stream_claim_ioctl - Ioctl to claim a struct vmw_stream overlay. 127 * @dev: Pointer to the drm device. 128 * @data: The ioctl argument 129 * @file_priv: Pointer to a struct drm_file identifying the caller. 130 * 131 * Return: 132 * 0 if successful. 133 * Negative error value on failure. 134 */ 135 int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, 136 struct drm_file *file_priv) 137 { 138 return vmw_simple_resource_create_ioctl(dev, data, file_priv, 139 &va_stream_func); 140 } 141 142 /** 143 * vmw_user_stream_lookup - Look up a struct vmw_user_stream from a handle. 144 * @dev_priv: Pointer to a struct vmw_private. 145 * @tfile: struct ttm_object_file identifying the caller. 146 * @inout_id: In: The user-space handle. Out: The stream id. 147 * @out: On output contains a refcounted pointer to the embedded 148 * struct vmw_resource. 149 * 150 * Return: 151 * 0 if successful. 152 * Negative error value on failure. 153 */ 154 int vmw_user_stream_lookup(struct vmw_private *dev_priv, 155 struct ttm_object_file *tfile, 156 uint32_t *inout_id, struct vmw_resource **out) 157 { 158 struct vmw_stream *stream; 159 struct vmw_resource *res = 160 vmw_simple_resource_lookup(tfile, *inout_id, &va_stream_func); 161 162 if (IS_ERR(res)) 163 return PTR_ERR(res); 164 165 stream = vmw_stream(res); 166 *inout_id = stream->stream_id; 167 *out = res; 168 169 return 0; 170 } 171