diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_ttm.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c new file mode 100644 index 000000000000..187eb84e4da5 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c @@ -0,0 +1,131 @@ +/* + * Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA, + * All Rights Reserved. + * Copyright (c) 2009 VMware, Inc., Palo Alto, CA., USA, + * All Rights Reserved. + * + * 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 "drmP.h" + +#include "nouveau_drv.h" + +static struct vm_operations_struct nouveau_ttm_vm_ops; +static const struct vm_operations_struct *ttm_vm_ops; + +static int +nouveau_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +{ + struct ttm_buffer_object *bo = vma->vm_private_data; + int ret; + + if (unlikely(bo == NULL)) + return VM_FAULT_NOPAGE; + + ret = ttm_vm_ops->fault(vma, vmf); + return ret; +} + +int +nouveau_ttm_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct drm_file *file_priv = filp->private_data; + struct drm_nouveau_private *dev_priv = + file_priv->minor->dev->dev_private; + int ret; + + if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) + return drm_mmap(filp, vma); + + ret = ttm_bo_mmap(filp, vma, &dev_priv->ttm.bdev); + if (unlikely(ret != 0)) + return ret; + + if (unlikely(ttm_vm_ops == NULL)) { + ttm_vm_ops = vma->vm_ops; + nouveau_ttm_vm_ops = *ttm_vm_ops; + nouveau_ttm_vm_ops.fault = &nouveau_ttm_fault; + } + + vma->vm_ops = &nouveau_ttm_vm_ops; + return 0; +} + +static int +nouveau_ttm_mem_global_init(struct ttm_global_reference *ref) +{ + return ttm_mem_global_init(ref->object); +} + +static void +nouveau_ttm_mem_global_release(struct ttm_global_reference *ref) +{ + ttm_mem_global_release(ref->object); +} + +int +nouveau_ttm_global_init(struct drm_nouveau_private *dev_priv) +{ + struct ttm_global_reference *global_ref; + int ret; + + global_ref = &dev_priv->ttm.mem_global_ref; + global_ref->global_type = TTM_GLOBAL_TTM_MEM; + global_ref->size = sizeof(struct ttm_mem_global); + global_ref->init = &nouveau_ttm_mem_global_init; + global_ref->release = &nouveau_ttm_mem_global_release; + + ret = ttm_global_item_ref(global_ref); + if (unlikely(ret != 0)) { + DRM_ERROR("Failed setting up TTM memory accounting\n"); + dev_priv->ttm.mem_global_ref.release = NULL; + return ret; + } + + dev_priv->ttm.bo_global_ref.mem_glob = global_ref->object; + global_ref = &dev_priv->ttm.bo_global_ref.ref; + global_ref->global_type = TTM_GLOBAL_TTM_BO; + global_ref->size = sizeof(struct ttm_bo_global); + global_ref->init = &ttm_bo_global_init; + global_ref->release = &ttm_bo_global_release; + + ret = ttm_global_item_ref(global_ref); + if (unlikely(ret != 0)) { + DRM_ERROR("Failed setting up TTM BO subsystem\n"); + ttm_global_item_unref(&dev_priv->ttm.mem_global_ref); + dev_priv->ttm.mem_global_ref.release = NULL; + return ret; + } + + return 0; +} + +void +nouveau_ttm_global_release(struct drm_nouveau_private *dev_priv) +{ + if (dev_priv->ttm.mem_global_ref.release == NULL) + return; + + ttm_global_item_unref(&dev_priv->ttm.bo_global_ref.ref); + ttm_global_item_unref(&dev_priv->ttm.mem_global_ref); + dev_priv->ttm.mem_global_ref.release = NULL; +} + |