diff options
Diffstat (limited to 'drivers/staging/cdv/imgv/psb_ttm_fence_user.c')
| -rw-r--r-- | drivers/staging/cdv/imgv/psb_ttm_fence_user.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/drivers/staging/cdv/imgv/psb_ttm_fence_user.c b/drivers/staging/cdv/imgv/psb_ttm_fence_user.c new file mode 100644 index 000000000000..7ada0ddd9809 --- /dev/null +++ b/drivers/staging/cdv/imgv/psb_ttm_fence_user.c @@ -0,0 +1,237 @@ +/************************************************************************** + * + * Copyright (c) 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA + * All Rights Reserved. + * Copyright (c) 2009 VMware, Inc., Palo Alto, CA., USA + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + **************************************************************************/ +/* + * Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> + */ + +#include <drm/drmP.h> +#include "psb_ttm_fence_user.h" +#include "ttm/ttm_object.h" +#include "psb_ttm_fence_driver.h" +#include "psb_ttm_userobj_api.h" + +/** + * struct ttm_fence_user_object + * + * @base: The base object used for user-space visibility and refcounting. + * + * @fence: The fence object itself. + * + */ + +struct ttm_fence_user_object { + struct ttm_base_object base; + struct ttm_fence_object fence; +}; + +static struct ttm_fence_user_object *ttm_fence_user_object_lookup( + struct ttm_object_file *tfile, + uint32_t handle) +{ + struct ttm_base_object *base; + + base = ttm_base_object_lookup(tfile, handle); + if (unlikely(base == NULL)) { + printk(KERN_ERR "Invalid fence handle 0x%08lx\n", + (unsigned long)handle); + return NULL; + } + + if (unlikely(base->object_type != ttm_fence_type)) { + ttm_base_object_unref(&base); + printk(KERN_ERR "Invalid fence handle 0x%08lx\n", + (unsigned long)handle); + return NULL; + } + + return container_of(base, struct ttm_fence_user_object, base); +} + +/* + * The fence object destructor. + */ + +static void ttm_fence_user_destroy(struct ttm_fence_object *fence) +{ + struct ttm_fence_user_object *ufence = + container_of(fence, struct ttm_fence_user_object, fence); + + ttm_mem_global_free(fence->fdev->mem_glob, sizeof(*ufence)); + kfree(ufence); +} + +/* + * The base object destructor. We basically unly unreference the + * attached fence object. + */ + +static void ttm_fence_user_release(struct ttm_base_object **p_base) +{ + struct ttm_fence_user_object *ufence; + struct ttm_base_object *base = *p_base; + struct ttm_fence_object *fence; + + *p_base = NULL; + + if (unlikely(base == NULL)) + return; + + ufence = container_of(base, struct ttm_fence_user_object, base); + fence = &ufence->fence; + ttm_fence_object_unref(&fence); +} + +int +ttm_fence_user_create(struct ttm_fence_device *fdev, + struct ttm_object_file *tfile, + uint32_t fence_class, + uint32_t fence_types, + uint32_t create_flags, + struct ttm_fence_object **fence, + uint32_t *user_handle) +{ + int ret; + struct ttm_fence_object *tmp; + struct ttm_fence_user_object *ufence; + + ret = ttm_mem_global_alloc(fdev->mem_glob, + sizeof(*ufence), + false, + false); + if (unlikely(ret != 0)) + return -ENOMEM; + + ufence = kmalloc(sizeof(*ufence), GFP_KERNEL); + if (unlikely(ufence == NULL)) { + ttm_mem_global_free(fdev->mem_glob, sizeof(*ufence)); + return -ENOMEM; + } + + ret = ttm_fence_object_init(fdev, + fence_class, + fence_types, create_flags, + &ttm_fence_user_destroy, &ufence->fence); + + if (unlikely(ret != 0)) + goto out_err0; + + /* + * One fence ref is held by the fence ptr we return. + * The other one by the base object. Need to up the + * fence refcount before we publish this object to + * user-space. + */ + + tmp = ttm_fence_object_ref(&ufence->fence); + ret = ttm_base_object_init(tfile, &ufence->base, + false, ttm_fence_type, + &ttm_fence_user_release, NULL); + + if (unlikely(ret != 0)) + goto out_err1; + + *fence = &ufence->fence; + *user_handle = ufence->base.hash.key; + + return 0; +out_err1: + ttm_fence_object_unref(&tmp); + tmp = &ufence->fence; + ttm_fence_object_unref(&tmp); + return ret; +out_err0: + ttm_mem_global_free(fdev->mem_glob, sizeof(*ufence)); + kfree(ufence); + return ret; +} + +int ttm_fence_signaled_ioctl(struct ttm_object_file *tfile, void *data) +{ + int ret; + union ttm_fence_signaled_arg *arg = data; + struct ttm_fence_object *fence; + struct ttm_fence_info info; + struct ttm_fence_user_object *ufence; + struct ttm_base_object *base; + ret = 0; + + ufence = ttm_fence_user_object_lookup(tfile, arg->req.handle); + if (unlikely(ufence == NULL)) + return -EINVAL; + + fence = &ufence->fence; + + if (arg->req.flush) { + ret = ttm_fence_object_flush(fence, arg->req.fence_type); + if (unlikely(ret != 0)) + goto out; + } + + info = ttm_fence_get_info(fence); + arg->rep.signaled_types = info.signaled_types; + arg->rep.fence_error = info.error; + +out: + base = &ufence->base; + ttm_base_object_unref(&base); + return ret; +} + +int ttm_fence_finish_ioctl(struct ttm_object_file *tfile, void *data) +{ + int ret; + union ttm_fence_finish_arg *arg = data; + struct ttm_fence_user_object *ufence; + struct ttm_base_object *base; + struct ttm_fence_object *fence; + ret = 0; + + ufence = ttm_fence_user_object_lookup(tfile, arg->req.handle); + if (unlikely(ufence == NULL)) + return -EINVAL; + + fence = &ufence->fence; + + ret = ttm_fence_object_wait(fence, + arg->req.mode & TTM_FENCE_FINISH_MODE_LAZY, + true, arg->req.fence_type); + if (likely(ret == 0)) { + struct ttm_fence_info info = ttm_fence_get_info(fence); + + arg->rep.signaled_types = info.signaled_types; + arg->rep.fence_error = info.error; + } + + base = &ufence->base; + ttm_base_object_unref(&base); + + return ret; +} + +int ttm_fence_unref_ioctl(struct ttm_object_file *tfile, void *data) +{ + struct ttm_fence_unref_arg *arg = data; + int ret = 0; + + ret = ttm_ref_object_base_unref(tfile, arg->handle, ttm_fence_type); + return ret; +} |