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- // SPDX-License-Identifier: GPL-2.0 OR MIT
- /**************************************************************************
- *
- * Copyright 2016 VMware, Inc., Palo Alto, CA., USA
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- **************************************************************************/
- #include "vmwgfx_drv.h"
- #include "vmwgfx_resource_priv.h"
- /**
- * struct vmw_user_simple_resource - User-space simple resource struct
- *
- * @base: The TTM base object implementing user-space visibility.
- * @account_size: How much memory was accounted for this object.
- * @simple: The embedded struct vmw_simple_resource.
- */
- struct vmw_user_simple_resource {
- struct ttm_base_object base;
- size_t account_size;
- struct vmw_simple_resource simple;
- /*
- * Nothing to be placed after @simple, since size of @simple is
- * unknown.
- */
- };
- /**
- * vmw_simple_resource_init - Initialize a simple resource object.
- *
- * @dev_priv: Pointer to a struct device private.
- * @simple: The struct vmw_simple_resource to initialize.
- * @data: Data passed to the information initialization function.
- * @res_free: Function pointer to destroy the simple resource.
- *
- * Returns:
- * 0 if succeeded.
- * Negative error value if error, in which case the resource will have been
- * freed.
- */
- static int vmw_simple_resource_init(struct vmw_private *dev_priv,
- struct vmw_simple_resource *simple,
- void *data,
- void (*res_free)(struct vmw_resource *res))
- {
- struct vmw_resource *res = &simple->res;
- int ret;
- ret = vmw_resource_init(dev_priv, res, false, res_free,
- &simple->func->res_func);
- if (ret) {
- res_free(res);
- return ret;
- }
- ret = simple->func->init(res, data);
- if (ret) {
- vmw_resource_unreference(&res);
- return ret;
- }
- simple->res.hw_destroy = simple->func->hw_destroy;
- return 0;
- }
- /**
- * vmw_simple_resource_free - Free a simple resource object.
- *
- * @res: The struct vmw_resource member of the simple resource object.
- *
- * Frees memory and memory accounting for the object.
- */
- static void vmw_simple_resource_free(struct vmw_resource *res)
- {
- struct vmw_user_simple_resource *usimple =
- container_of(res, struct vmw_user_simple_resource,
- simple.res);
- struct vmw_private *dev_priv = res->dev_priv;
- size_t size = usimple->account_size;
- ttm_base_object_kfree(usimple, base);
- ttm_mem_global_free(vmw_mem_glob(dev_priv), size);
- }
- /**
- * vmw_simple_resource_base_release - TTM object release callback
- *
- * @p_base: The struct ttm_base_object member of the simple resource object.
- *
- * Called when the last reference to the embedded struct ttm_base_object is
- * gone. Typically results in an object free, unless there are other
- * references to the embedded struct vmw_resource.
- */
- static void vmw_simple_resource_base_release(struct ttm_base_object **p_base)
- {
- struct ttm_base_object *base = *p_base;
- struct vmw_user_simple_resource *usimple =
- container_of(base, struct vmw_user_simple_resource, base);
- struct vmw_resource *res = &usimple->simple.res;
- *p_base = NULL;
- vmw_resource_unreference(&res);
- }
- /**
- * vmw_simple_resource_create_ioctl - Helper to set up an ioctl function to
- * create a struct vmw_simple_resource.
- *
- * @dev: Pointer to a struct drm device.
- * @data: Ioctl argument.
- * @file_priv: Pointer to a struct drm_file identifying the caller.
- * @func: Pointer to a struct vmw_simple_resource_func identifying the
- * simple resource type.
- *
- * Returns:
- * 0 if success,
- * Negative error value on error.
- */
- int
- vmw_simple_resource_create_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv,
- const struct vmw_simple_resource_func *func)
- {
- struct vmw_private *dev_priv = vmw_priv(dev);
- struct vmw_user_simple_resource *usimple;
- struct vmw_resource *res;
- struct vmw_resource *tmp;
- struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
- struct ttm_operation_ctx ctx = {
- .interruptible = true,
- .no_wait_gpu = false
- };
- size_t alloc_size;
- size_t account_size;
- int ret;
- alloc_size = offsetof(struct vmw_user_simple_resource, simple) +
- func->size;
- account_size = ttm_round_pot(alloc_size) + VMW_IDA_ACC_SIZE +
- TTM_OBJ_EXTRA_SIZE;
- ret = ttm_read_lock(&dev_priv->reservation_sem, true);
- if (ret)
- return ret;
- ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), account_size,
- &ctx);
- ttm_read_unlock(&dev_priv->reservation_sem);
- if (ret) {
- if (ret != -ERESTARTSYS)
- DRM_ERROR("Out of graphics memory for %s"
- " creation.\n", func->res_func.type_name);
- goto out_ret;
- }
- usimple = kzalloc(alloc_size, GFP_KERNEL);
- if (!usimple) {
- ttm_mem_global_free(vmw_mem_glob(dev_priv),
- account_size);
- ret = -ENOMEM;
- goto out_ret;
- }
- usimple->simple.func = func;
- usimple->account_size = account_size;
- res = &usimple->simple.res;
- usimple->base.shareable = false;
- usimple->base.tfile = NULL;
- /*
- * From here on, the destructor takes over resource freeing.
- */
- ret = vmw_simple_resource_init(dev_priv, &usimple->simple,
- data, vmw_simple_resource_free);
- if (ret)
- goto out_ret;
- tmp = vmw_resource_reference(res);
- ret = ttm_base_object_init(tfile, &usimple->base, false,
- func->ttm_res_type,
- &vmw_simple_resource_base_release, NULL);
- if (ret) {
- vmw_resource_unreference(&tmp);
- goto out_err;
- }
- func->set_arg_handle(data, usimple->base.handle);
- out_err:
- vmw_resource_unreference(&res);
- out_ret:
- return ret;
- }
- /**
- * vmw_simple_resource_lookup - Look up a simple resource from its user-space
- * handle.
- *
- * @tfile: struct ttm_object_file identifying the caller.
- * @handle: The user-space handle.
- * @func: The struct vmw_simple_resource_func identifying the simple resource
- * type.
- *
- * Returns: Refcounted pointer to the embedded struct vmw_resource if
- * successfule. Error pointer otherwise.
- */
- struct vmw_resource *
- vmw_simple_resource_lookup(struct ttm_object_file *tfile,
- uint32_t handle,
- const struct vmw_simple_resource_func *func)
- {
- struct vmw_user_simple_resource *usimple;
- struct ttm_base_object *base;
- struct vmw_resource *res;
- base = ttm_base_object_lookup(tfile, handle);
- if (!base) {
- VMW_DEBUG_USER("Invalid %s handle 0x%08lx.\n",
- func->res_func.type_name,
- (unsigned long) handle);
- return ERR_PTR(-ESRCH);
- }
- if (ttm_base_object_type(base) != func->ttm_res_type) {
- ttm_base_object_unref(&base);
- VMW_DEBUG_USER("Invalid type of %s handle 0x%08lx.\n",
- func->res_func.type_name,
- (unsigned long) handle);
- return ERR_PTR(-EINVAL);
- }
- usimple = container_of(base, typeof(*usimple), base);
- res = vmw_resource_reference(&usimple->simple.res);
- ttm_base_object_unref(&base);
- return res;
- }
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