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Diffstat (limited to 'kernel/include/drm/drm_legacy.h')
| -rw-r--r-- | kernel/include/drm/drm_legacy.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/kernel/include/drm/drm_legacy.h b/kernel/include/drm/drm_legacy.h new file mode 100644 index 000000000..3e698038d --- /dev/null +++ b/kernel/include/drm/drm_legacy.h @@ -0,0 +1,203 @@ +#ifndef __DRM_DRM_LEGACY_H__ +#define __DRM_DRM_LEGACY_H__ + +/* + * Legacy driver interfaces for the Direct Rendering Manager + * + * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. + * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. + * Copyright (c) 2009-2010, Code Aurora Forum. + * All rights reserved. + * Copyright © 2014 Intel Corporation + * Daniel Vetter <daniel.vetter@ffwll.ch> + * + * Author: Rickard E. (Rik) Faith <faith@valinux.com> + * Author: Gareth Hughes <gareth@valinux.com> + * + * 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, sublicense, + * 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 NONINFRINGEMENT. IN NO EVENT SHALL + * VA LINUX SYSTEMS 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. + */ + + +/* + * Legacy Support for palateontologic DRM drivers + * + * If you add a new driver and it uses any of these functions or structures, + * you're doing it terribly wrong. + */ + +/** + * DMA buffer. + */ +struct drm_buf { + int idx; /**< Index into master buflist */ + int total; /**< Buffer size */ + int order; /**< log-base-2(total) */ + int used; /**< Amount of buffer in use (for DMA) */ + unsigned long offset; /**< Byte offset (used internally) */ + void *address; /**< Address of buffer */ + unsigned long bus_address; /**< Bus address of buffer */ + struct drm_buf *next; /**< Kernel-only: used for free list */ + __volatile__ int waiting; /**< On kernel DMA queue */ + __volatile__ int pending; /**< On hardware DMA queue */ + struct drm_file *file_priv; /**< Private of holding file descr */ + int context; /**< Kernel queue for this buffer */ + int while_locked; /**< Dispatch this buffer while locked */ + enum { + DRM_LIST_NONE = 0, + DRM_LIST_FREE = 1, + DRM_LIST_WAIT = 2, + DRM_LIST_PEND = 3, + DRM_LIST_PRIO = 4, + DRM_LIST_RECLAIM = 5 + } list; /**< Which list we're on */ + + int dev_priv_size; /**< Size of buffer private storage */ + void *dev_private; /**< Per-buffer private storage */ +}; + +typedef struct drm_dma_handle { + dma_addr_t busaddr; + void *vaddr; + size_t size; +} drm_dma_handle_t; + +/** + * Buffer entry. There is one of this for each buffer size order. + */ +struct drm_buf_entry { + int buf_size; /**< size */ + int buf_count; /**< number of buffers */ + struct drm_buf *buflist; /**< buffer list */ + int seg_count; + int page_order; + struct drm_dma_handle **seglist; + + int low_mark; /**< Low water mark */ + int high_mark; /**< High water mark */ +}; + +/** + * DMA data. + */ +struct drm_device_dma { + + struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */ + int buf_count; /**< total number of buffers */ + struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */ + int seg_count; + int page_count; /**< number of pages */ + unsigned long *pagelist; /**< page list */ + unsigned long byte_count; + enum { + _DRM_DMA_USE_AGP = 0x01, + _DRM_DMA_USE_SG = 0x02, + _DRM_DMA_USE_FB = 0x04, + _DRM_DMA_USE_PCI_RO = 0x08 + } flags; + +}; + +/** + * Scatter-gather memory. + */ +struct drm_sg_mem { + unsigned long handle; + void *virtual; + int pages; + struct page **pagelist; + dma_addr_t *busaddr; +}; + +/** + * Kernel side of a mapping + */ +struct drm_local_map { + resource_size_t offset; /**< Requested physical address (0 for SAREA)*/ + unsigned long size; /**< Requested physical size (bytes) */ + enum drm_map_type type; /**< Type of memory to map */ + enum drm_map_flags flags; /**< Flags */ + void *handle; /**< User-space: "Handle" to pass to mmap() */ + /**< Kernel-space: kernel-virtual address */ + int mtrr; /**< MTRR slot used */ +}; + +typedef struct drm_local_map drm_local_map_t; + +/** + * Mappings list + */ +struct drm_map_list { + struct list_head head; /**< list head */ + struct drm_hash_item hash; + struct drm_local_map *map; /**< mapping */ + uint64_t user_token; + struct drm_master *master; +}; + +int drm_legacy_addmap(struct drm_device *d, resource_size_t offset, + unsigned int size, enum drm_map_type type, + enum drm_map_flags flags, struct drm_local_map **map_p); +int drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map); +int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map); +struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev); +int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma); + +int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req); +int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req); + +/** + * Test that the hardware lock is held by the caller, returning otherwise. + * + * \param dev DRM device. + * \param filp file pointer of the caller. + */ +#define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \ +do { \ + if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \ + _file_priv->master->lock.file_priv != _file_priv) { \ + DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\ + __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\ + _file_priv->master->lock.file_priv, _file_priv); \ + return -EINVAL; \ + } \ +} while (0) + +void drm_legacy_idlelock_take(struct drm_lock_data *lock); +void drm_legacy_idlelock_release(struct drm_lock_data *lock); + +/* drm_pci.c dma alloc wrappers */ +void __drm_legacy_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah); + +/* drm_memory.c */ +void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev); +void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev); +void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev); + +static __inline__ struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, + unsigned int token) +{ + struct drm_map_list *_entry; + list_for_each_entry(_entry, &dev->maplist, head) + if (_entry->user_token == token) + return _entry->map; + return NULL; +} + +#endif /* __DRM_DRM_LEGACY_H__ */ |