1169689Skan/* $NetBSD: vmwgfx_simple_resource.c,v 1.2 2021/12/18 23:45:45 riastradh Exp $ */ 2169689Skan 3169689Skan// SPDX-License-Identifier: GPL-2.0 OR MIT 4169689Skan/************************************************************************** 5169689Skan * 6169689Skan * Copyright 2016 VMware, Inc., Palo Alto, CA., USA 7169689Skan * 8169689Skan * Permission is hereby granted, free of charge, to any person obtaining a 9169689Skan * copy of this software and associated documentation files (the 10169689Skan * "Software"), to deal in the Software without restriction, including 11169689Skan * without limitation the rights to use, copy, modify, merge, publish, 12169689Skan * distribute, sub license, and/or sell copies of the Software, and to 13169689Skan * permit persons to whom the Software is furnished to do so, subject to 14169689Skan * the following conditions: 15169689Skan * 16169689Skan * The above copyright notice and this permission notice (including the 17169689Skan * next paragraph) shall be included in all copies or substantial portions 18169689Skan * of the Software. 19169689Skan * 20169689Skan * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21169689Skan * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22169689Skan * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 23169689Skan * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 24169689Skan * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 25169689Skan * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 26169689Skan * USE OR OTHER DEALINGS IN THE SOFTWARE. 27169689Skan * 28169689Skan **************************************************************************/ 29169689Skan 30169689Skan#include <sys/cdefs.h> 31169689Skan__KERNEL_RCSID(0, "$NetBSD: vmwgfx_simple_resource.c,v 1.2 2021/12/18 23:45:45 riastradh Exp $"); 32169689Skan 33169689Skan#include "vmwgfx_drv.h" 34169689Skan#include "vmwgfx_resource_priv.h" 35169689Skan 36169689Skan/** 37169689Skan * struct vmw_user_simple_resource - User-space simple resource struct 38169689Skan * 39169689Skan * @base: The TTM base object implementing user-space visibility. 40169689Skan * @account_size: How much memory was accounted for this object. 41169689Skan * @simple: The embedded struct vmw_simple_resource. 42169689Skan */ 43169689Skanstruct vmw_user_simple_resource { 44169689Skan struct ttm_base_object base; 45169689Skan size_t account_size; 46169689Skan struct vmw_simple_resource simple; 47169689Skan/* 48169689Skan * Nothing to be placed after @simple, since size of @simple is 49169689Skan * unknown. 50169689Skan */ 51169689Skan}; 52169689Skan 53169689Skan 54169689Skan/** 55169689Skan * vmw_simple_resource_init - Initialize a simple resource object. 56169689Skan * 57169689Skan * @dev_priv: Pointer to a struct device private. 58169689Skan * @simple: The struct vmw_simple_resource to initialize. 59169689Skan * @data: Data passed to the information initialization function. 60169689Skan * @res_free: Function pointer to destroy the simple resource. 61169689Skan * 62169689Skan * Returns: 63169689Skan * 0 if succeeded. 64169689Skan * Negative error value if error, in which case the resource will have been 65169689Skan * freed. 66169689Skan */ 67169689Skanstatic int vmw_simple_resource_init(struct vmw_private *dev_priv, 68169689Skan struct vmw_simple_resource *simple, 69169689Skan void *data, 70169689Skan void (*res_free)(struct vmw_resource *res)) 71169689Skan{ 72169689Skan struct vmw_resource *res = &simple->res; 73169689Skan int ret; 74169689Skan 75169689Skan ret = vmw_resource_init(dev_priv, res, false, res_free, 76169689Skan &simple->func->res_func); 77169689Skan 78169689Skan if (ret) { 79169689Skan res_free(res); 80169689Skan return ret; 81169689Skan } 82169689Skan 83169689Skan ret = simple->func->init(res, data); 84169689Skan if (ret) { 85169689Skan vmw_resource_unreference(&res); 86169689Skan return ret; 87169689Skan } 88169689Skan 89169689Skan simple->res.hw_destroy = simple->func->hw_destroy; 90169689Skan 91169689Skan return 0; 92169689Skan} 93169689Skan 94169689Skan/** 95169689Skan * vmw_simple_resource_free - Free a simple resource object. 96169689Skan * 97169689Skan * @res: The struct vmw_resource member of the simple resource object. 98169689Skan * 99169689Skan * Frees memory and memory accounting for the object. 100169689Skan */ 101169689Skanstatic void vmw_simple_resource_free(struct vmw_resource *res) 102169689Skan{ 103169689Skan struct vmw_user_simple_resource *usimple = 104169689Skan container_of(res, struct vmw_user_simple_resource, 105169689Skan simple.res); 106169689Skan struct vmw_private *dev_priv = res->dev_priv; 107169689Skan size_t size = usimple->account_size; 108169689Skan 109169689Skan ttm_base_object_kfree(usimple, base); 110169689Skan ttm_mem_global_free(vmw_mem_glob(dev_priv), size); 111169689Skan} 112169689Skan 113169689Skan/** 114169689Skan * vmw_simple_resource_base_release - TTM object release callback 115169689Skan * 116169689Skan * @p_base: The struct ttm_base_object member of the simple resource object. 117169689Skan * 118169689Skan * Called when the last reference to the embedded struct ttm_base_object is 119169689Skan * gone. Typically results in an object free, unless there are other 120169689Skan * references to the embedded struct vmw_resource. 121169689Skan */ 122169689Skanstatic void vmw_simple_resource_base_release(struct ttm_base_object **p_base) 123169689Skan{ 124169689Skan struct ttm_base_object *base = *p_base; 125169689Skan struct vmw_user_simple_resource *usimple = 126169689Skan container_of(base, struct vmw_user_simple_resource, base); 127169689Skan struct vmw_resource *res = &usimple->simple.res; 128169689Skan 129169689Skan *p_base = NULL; 130169689Skan vmw_resource_unreference(&res); 131169689Skan} 132169689Skan 133169689Skan/** 134169689Skan * vmw_simple_resource_create_ioctl - Helper to set up an ioctl function to 135169689Skan * create a struct vmw_simple_resource. 136169689Skan * 137169689Skan * @dev: Pointer to a struct drm device. 138169689Skan * @data: Ioctl argument. 139169689Skan * @file_priv: Pointer to a struct drm_file identifying the caller. 140169689Skan * @func: Pointer to a struct vmw_simple_resource_func identifying the 141169689Skan * simple resource type. 142169689Skan * 143169689Skan * Returns: 144169689Skan * 0 if success, 145169689Skan * Negative error value on error. 146169689Skan */ 147169689Skanint 148169689Skanvmw_simple_resource_create_ioctl(struct drm_device *dev, void *data, 149169689Skan struct drm_file *file_priv, 150169689Skan const struct vmw_simple_resource_func *func) 151169689Skan{ 152169689Skan struct vmw_private *dev_priv = vmw_priv(dev); 153169689Skan struct vmw_user_simple_resource *usimple; 154169689Skan struct vmw_resource *res; 155169689Skan struct vmw_resource *tmp; 156169689Skan struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; 157169689Skan struct ttm_operation_ctx ctx = { 158169689Skan .interruptible = true, 159169689Skan .no_wait_gpu = false 160169689Skan }; 161169689Skan size_t alloc_size; 162169689Skan size_t account_size; 163169689Skan int ret; 164169689Skan 165169689Skan alloc_size = offsetof(struct vmw_user_simple_resource, simple) + 166169689Skan func->size; 167169689Skan account_size = ttm_round_pot(alloc_size) + VMW_IDA_ACC_SIZE + 168169689Skan TTM_OBJ_EXTRA_SIZE; 169169689Skan 170169689Skan ret = ttm_read_lock(&dev_priv->reservation_sem, true); 171169689Skan if (ret) 172169689Skan return ret; 173169689Skan 174169689Skan ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), account_size, 175169689Skan &ctx); 176169689Skan ttm_read_unlock(&dev_priv->reservation_sem); 177169689Skan if (ret) { 178169689Skan if (ret != -ERESTARTSYS) 179169689Skan DRM_ERROR("Out of graphics memory for %s" 180169689Skan " creation.\n", func->res_func.type_name); 181169689Skan 182169689Skan goto out_ret; 183169689Skan } 184169689Skan 185169689Skan usimple = kzalloc(alloc_size, GFP_KERNEL); 186169689Skan if (!usimple) { 187169689Skan ttm_mem_global_free(vmw_mem_glob(dev_priv), 188169689Skan account_size); 189169689Skan ret = -ENOMEM; 190169689Skan goto out_ret; 191169689Skan } 192169689Skan 193169689Skan usimple->simple.func = func; 194169689Skan usimple->account_size = account_size; 195169689Skan res = &usimple->simple.res; 196169689Skan usimple->base.shareable = false; 197169689Skan usimple->base.tfile = NULL; 198169689Skan 199169689Skan /* 200169689Skan * From here on, the destructor takes over resource freeing. 201169689Skan */ 202169689Skan ret = vmw_simple_resource_init(dev_priv, &usimple->simple, 203169689Skan data, vmw_simple_resource_free); 204169689Skan if (ret) 205169689Skan goto out_ret; 206169689Skan 207169689Skan tmp = vmw_resource_reference(res); 208169689Skan ret = ttm_base_object_init(tfile, &usimple->base, false, 209169689Skan func->ttm_res_type, 210169689Skan &vmw_simple_resource_base_release, NULL); 211169689Skan 212169689Skan if (ret) { 213169689Skan vmw_resource_unreference(&tmp); 214169689Skan goto out_err; 215169689Skan } 216169689Skan 217169689Skan func->set_arg_handle(data, usimple->base.handle); 218169689Skanout_err: 219169689Skan vmw_resource_unreference(&res); 220169689Skanout_ret: 221169689Skan return ret; 222169689Skan} 223169689Skan 224169689Skan/** 225169689Skan * vmw_simple_resource_lookup - Look up a simple resource from its user-space 226169689Skan * handle. 227169689Skan * 228169689Skan * @tfile: struct ttm_object_file identifying the caller. 229169689Skan * @handle: The user-space handle. 230169689Skan * @func: The struct vmw_simple_resource_func identifying the simple resource 231169689Skan * type. 232169689Skan * 233169689Skan * Returns: Refcounted pointer to the embedded struct vmw_resource if 234169689Skan * successfule. Error pointer otherwise. 235169689Skan */ 236169689Skanstruct vmw_resource * 237169689Skanvmw_simple_resource_lookup(struct ttm_object_file *tfile, 238169689Skan uint32_t handle, 239169689Skan const struct vmw_simple_resource_func *func) 240169689Skan{ 241169689Skan struct vmw_user_simple_resource *usimple; 242169689Skan struct ttm_base_object *base; 243169689Skan struct vmw_resource *res; 244169689Skan 245169689Skan base = ttm_base_object_lookup(tfile, handle); 246169689Skan if (!base) { 247169689Skan VMW_DEBUG_USER("Invalid %s handle 0x%08lx.\n", 248169689Skan func->res_func.type_name, 249169689Skan (unsigned long) handle); 250169689Skan return ERR_PTR(-ESRCH); 251169689Skan } 252169689Skan 253169689Skan if (ttm_base_object_type(base) != func->ttm_res_type) { 254169689Skan ttm_base_object_unref(&base); 255169689Skan VMW_DEBUG_USER("Invalid type of %s handle 0x%08lx.\n", 256169689Skan func->res_func.type_name, 257169689Skan (unsigned long) handle); 258169689Skan return ERR_PTR(-EINVAL); 259169689Skan } 260169689Skan 261169689Skan usimple = container_of(base, typeof(*usimple), base); 262169689Skan res = vmw_resource_reference(&usimple->simple.res); 263169689Skan ttm_base_object_unref(&base); 264169689Skan 265169689Skan return res; 266169689Skan} 267169689Skan