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1// SPDX-License-Identifier: GPL-2.0 OR MIT2/**************************************************************************3 *4 * Copyright 2012-2016 VMware, Inc., Palo Alto, CA., USA5 *6 * Permission is hereby granted, free of charge, to any person obtaining a7 * copy of this software and associated documentation files (the8 * "Software"), to deal in the Software without restriction, including9 * without limitation the rights to use, copy, modify, merge, publish,10 * distribute, sub license, and/or sell copies of the Software, and to11 * permit persons to whom the Software is furnished to do so, subject to12 * the following conditions:13 *14 * The above copyright notice and this permission notice (including the15 * next paragraph) shall be included in all copies or substantial portions16 * of the Software.17 *18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL21 * 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 OR23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE24 * 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 */37struct 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 */48static struct vmw_stream *49vmw_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_stream56 **************************************************************************/57static 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 67static 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 74static 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 81static 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 = NULL93 },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_stream103 **************************************************************************/104 105/**106 * vmw_stream_unref_ioctl - Ioctl to unreference a user-space handle to107 * a struct vmw_stream.108 * @dev: Pointer to the drm device.109 * @data: The ioctl argument110 * @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 */116int 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 argument129 * @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 */135int 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 embedded148 * struct vmw_resource.149 *150 * Return:151 * 0 if successful.152 * Negative error value on failure.153 */154int 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