2009-06-10 09:20:19 -04:00
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/**************************************************************************
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*
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* Copyright (c) 2006-2009 Vmware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
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*/
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#ifndef _TTM_BO_DRIVER_H_
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#define _TTM_BO_DRIVER_H_
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#include "ttm/ttm_bo_api.h"
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#include "ttm/ttm_memory.h"
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2009-08-18 10:51:56 -04:00
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#include "ttm/ttm_module.h"
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2009-06-10 09:20:19 -04:00
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#include "drm_mm.h"
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#include "linux/workqueue.h"
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#include "linux/fs.h"
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#include "linux/spinlock.h"
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struct ttm_backend;
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struct ttm_backend_func {
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/**
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* struct ttm_backend_func member populate
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*
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* @backend: Pointer to a struct ttm_backend.
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* @num_pages: Number of pages to populate.
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* @pages: Array of pointers to ttm pages.
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* @dummy_read_page: Page to be used instead of NULL pages in the
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* array @pages.
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*
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* Populate the backend with ttm pages. Depending on the backend,
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* it may or may not copy the @pages array.
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*/
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int (*populate) (struct ttm_backend *backend,
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unsigned long num_pages, struct page **pages,
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struct page *dummy_read_page);
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/**
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* struct ttm_backend_func member clear
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*
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* @backend: Pointer to a struct ttm_backend.
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*
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* This is an "unpopulate" function. Release all resources
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* allocated with populate.
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*/
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void (*clear) (struct ttm_backend *backend);
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/**
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* struct ttm_backend_func member bind
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*
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* @backend: Pointer to a struct ttm_backend.
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* @bo_mem: Pointer to a struct ttm_mem_reg describing the
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* memory type and location for binding.
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*
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* Bind the backend pages into the aperture in the location
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* indicated by @bo_mem. This function should be able to handle
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* differences between aperture- and system page sizes.
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*/
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int (*bind) (struct ttm_backend *backend, struct ttm_mem_reg *bo_mem);
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/**
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* struct ttm_backend_func member unbind
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*
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* @backend: Pointer to a struct ttm_backend.
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*
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* Unbind previously bound backend pages. This function should be
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* able to handle differences between aperture- and system page sizes.
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*/
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int (*unbind) (struct ttm_backend *backend);
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/**
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* struct ttm_backend_func member destroy
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*
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* @backend: Pointer to a struct ttm_backend.
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*
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* Destroy the backend.
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*/
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void (*destroy) (struct ttm_backend *backend);
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};
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/**
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* struct ttm_backend
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*
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* @bdev: Pointer to a struct ttm_bo_device.
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* @flags: For driver use.
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* @func: Pointer to a struct ttm_backend_func that describes
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* the backend methods.
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*
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*/
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struct ttm_backend {
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struct ttm_bo_device *bdev;
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uint32_t flags;
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struct ttm_backend_func *func;
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};
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#define TTM_PAGE_FLAG_USER (1 << 1)
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#define TTM_PAGE_FLAG_USER_DIRTY (1 << 2)
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#define TTM_PAGE_FLAG_WRITE (1 << 3)
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#define TTM_PAGE_FLAG_SWAPPED (1 << 4)
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#define TTM_PAGE_FLAG_PERSISTANT_SWAP (1 << 5)
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#define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6)
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#define TTM_PAGE_FLAG_DMA32 (1 << 7)
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2009-06-10 09:20:19 -04:00
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enum ttm_caching_state {
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tt_uncached,
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tt_wc,
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tt_cached
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};
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/**
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* struct ttm_tt
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*
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* @dummy_read_page: Page to map where the ttm_tt page array contains a NULL
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* pointer.
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* @pages: Array of pages backing the data.
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* @first_himem_page: Himem pages are put last in the page array, which
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* enables us to run caching attribute changes on only the first part
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* of the page array containing lomem pages. This is the index of the
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* first himem page.
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* @last_lomem_page: Index of the last lomem page in the page array.
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* @num_pages: Number of pages in the page array.
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* @bdev: Pointer to the current struct ttm_bo_device.
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* @be: Pointer to the ttm backend.
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* @tsk: The task for user ttm.
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* @start: virtual address for user ttm.
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* @swap_storage: Pointer to shmem struct file for swap storage.
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* @caching_state: The current caching state of the pages.
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* @state: The current binding state of the pages.
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*
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* This is a structure holding the pages, caching- and aperture binding
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* status for a buffer object that isn't backed by fixed (VRAM / AGP)
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* memory.
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*/
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struct ttm_tt {
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struct page *dummy_read_page;
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struct page **pages;
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long first_himem_page;
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long last_lomem_page;
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uint32_t page_flags;
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unsigned long num_pages;
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struct ttm_bo_global *glob;
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2009-06-10 09:20:19 -04:00
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struct ttm_backend *be;
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struct task_struct *tsk;
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unsigned long start;
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struct file *swap_storage;
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enum ttm_caching_state caching_state;
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enum {
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tt_bound,
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tt_unbound,
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tt_unpopulated,
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} state;
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};
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#define TTM_MEMTYPE_FLAG_FIXED (1 << 0) /* Fixed (on-card) PCI memory */
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#define TTM_MEMTYPE_FLAG_MAPPABLE (1 << 1) /* Memory mappable */
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#define TTM_MEMTYPE_FLAG_CMA (1 << 3) /* Can't map aperture */
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/**
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* struct ttm_mem_type_manager
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*
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* @has_type: The memory type has been initialized.
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* @use_type: The memory type is enabled.
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* @flags: TTM_MEMTYPE_XX flags identifying the traits of the memory
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* managed by this memory type.
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* @gpu_offset: If used, the GPU offset of the first managed page of
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* fixed memory or the first managed location in an aperture.
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* @size: Size of the managed region.
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* @available_caching: A mask of available caching types, TTM_PL_FLAG_XX,
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* as defined in ttm_placement_common.h
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* @default_caching: The default caching policy used for a buffer object
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* placed in this memory type if the user doesn't provide one.
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* @manager: The range manager used for this memory type. FIXME: If the aperture
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* has a page size different from the underlying system, the granularity
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* of this manager should take care of this. But the range allocating code
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* in ttm_bo.c needs to be modified for this.
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* @lru: The lru list for this memory type.
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*
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* This structure is used to identify and manage memory types for a device.
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* It's set up by the ttm_bo_driver::init_mem_type method.
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*/
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struct ttm_mem_type_manager {
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/*
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* No protection. Constant from start.
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*/
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bool has_type;
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bool use_type;
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uint32_t flags;
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unsigned long gpu_offset;
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uint64_t size;
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uint32_t available_caching;
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uint32_t default_caching;
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/*
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* Protected by the bdev->lru_lock.
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* TODO: Consider one lru_lock per ttm_mem_type_manager.
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* Plays ill with list removal, though.
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*/
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struct drm_mm manager;
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struct list_head lru;
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};
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/**
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* struct ttm_bo_driver
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*
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* @create_ttm_backend_entry: Callback to create a struct ttm_backend.
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* @invalidate_caches: Callback to invalidate read caches when a buffer object
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* has been evicted.
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* @init_mem_type: Callback to initialize a struct ttm_mem_type_manager
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* structure.
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* @evict_flags: Callback to obtain placement flags when a buffer is evicted.
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* @move: Callback for a driver to hook in accelerated functions to
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* move a buffer.
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* If set to NULL, a potentially slow memcpy() move is used.
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* @sync_obj_signaled: See ttm_fence_api.h
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* @sync_obj_wait: See ttm_fence_api.h
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* @sync_obj_flush: See ttm_fence_api.h
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* @sync_obj_unref: See ttm_fence_api.h
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* @sync_obj_ref: See ttm_fence_api.h
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*/
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struct ttm_bo_driver {
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/**
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* struct ttm_bo_driver member create_ttm_backend_entry
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*
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* @bdev: The buffer object device.
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*
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* Create a driver specific struct ttm_backend.
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*/
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struct ttm_backend *(*create_ttm_backend_entry)
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(struct ttm_bo_device *bdev);
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/**
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* struct ttm_bo_driver member invalidate_caches
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*
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* @bdev: the buffer object device.
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* @flags: new placement of the rebound buffer object.
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*
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* A previosly evicted buffer has been rebound in a
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* potentially new location. Tell the driver that it might
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* consider invalidating read (texture) caches on the next command
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* submission as a consequence.
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*/
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int (*invalidate_caches) (struct ttm_bo_device *bdev, uint32_t flags);
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int (*init_mem_type) (struct ttm_bo_device *bdev, uint32_t type,
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struct ttm_mem_type_manager *man);
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/**
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* struct ttm_bo_driver member evict_flags:
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*
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* @bo: the buffer object to be evicted
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*
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* Return the bo flags for a buffer which is not mapped to the hardware.
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* These will be placed in proposed_flags so that when the move is
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* finished, they'll end up in bo->mem.flags
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*/
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2009-12-08 09:33:32 -05:00
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void(*evict_flags) (struct ttm_buffer_object *bo,
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struct ttm_placement *placement);
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2009-06-10 09:20:19 -04:00
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/**
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* struct ttm_bo_driver member move:
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*
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* @bo: the buffer to move
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* @evict: whether this motion is evicting the buffer from
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* the graphics address space
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* @interruptible: Use interruptible sleeps if possible when sleeping.
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* @no_wait: whether this should give up and return -EBUSY
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* if this move would require sleeping
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* @new_mem: the new memory region receiving the buffer
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*
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* Move a buffer between two memory regions.
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*/
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int (*move) (struct ttm_buffer_object *bo,
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bool evict, bool interruptible,
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2010-04-07 06:21:19 -04:00
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bool no_wait_reserve, bool no_wait_gpu,
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struct ttm_mem_reg *new_mem);
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2009-06-10 09:20:19 -04:00
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/**
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* struct ttm_bo_driver_member verify_access
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*
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* @bo: Pointer to a buffer object.
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* @filp: Pointer to a struct file trying to access the object.
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*
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* Called from the map / write / read methods to verify that the
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* caller is permitted to access the buffer object.
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* This member may be set to NULL, which will refuse this kind of
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* access for all buffer objects.
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* This function should return 0 if access is granted, -EPERM otherwise.
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*/
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int (*verify_access) (struct ttm_buffer_object *bo,
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struct file *filp);
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/**
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* In case a driver writer dislikes the TTM fence objects,
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* the driver writer can replace those with sync objects of
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* his / her own. If it turns out that no driver writer is
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* using these. I suggest we remove these hooks and plug in
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* fences directly. The bo driver needs the following functionality:
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* See the corresponding functions in the fence object API
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* documentation.
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*/
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bool (*sync_obj_signaled) (void *sync_obj, void *sync_arg);
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int (*sync_obj_wait) (void *sync_obj, void *sync_arg,
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bool lazy, bool interruptible);
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int (*sync_obj_flush) (void *sync_obj, void *sync_arg);
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void (*sync_obj_unref) (void **sync_obj);
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void *(*sync_obj_ref) (void *sync_obj);
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2009-06-23 19:48:08 -04:00
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/* hook to notify driver about a driver move so it
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* can do tiling things */
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void (*move_notify)(struct ttm_buffer_object *bo,
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struct ttm_mem_reg *new_mem);
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/* notify the driver we are taking a fault on this BO
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* and have reserved it */
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2010-04-09 08:39:23 -04:00
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int (*fault_reserve_notify)(struct ttm_buffer_object *bo);
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2010-01-13 16:28:40 -05:00
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/**
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* notify the driver that we're about to swap out this bo
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*/
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void (*swap_notify) (struct ttm_buffer_object *bo);
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2010-04-09 08:39:23 -04:00
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/**
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* Driver callback on when mapping io memory (for bo_move_memcpy
|
|
|
|
* for instance). TTM will take care to call io_mem_free whenever
|
|
|
|
* the mapping is not use anymore. io_mem_reserve & io_mem_free
|
|
|
|
* are balanced.
|
|
|
|
*/
|
|
|
|
int (*io_mem_reserve)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);
|
|
|
|
void (*io_mem_free)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);
|
2009-06-10 09:20:19 -04:00
|
|
|
};
|
|
|
|
|
2009-08-18 10:51:56 -04:00
|
|
|
/**
|
|
|
|
* struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct ttm_bo_global_ref {
|
|
|
|
struct ttm_global_reference ref;
|
|
|
|
struct ttm_mem_global *mem_glob;
|
|
|
|
};
|
2009-06-10 09:20:19 -04:00
|
|
|
|
|
|
|
/**
|
2009-08-18 10:51:56 -04:00
|
|
|
* struct ttm_bo_global - Buffer object driver global data.
|
2009-06-10 09:20:19 -04:00
|
|
|
*
|
|
|
|
* @mem_glob: Pointer to a struct ttm_mem_global object for accounting.
|
|
|
|
* @dummy_read_page: Pointer to a dummy page used for mapping requests
|
|
|
|
* of unpopulated pages.
|
2009-08-18 10:51:56 -04:00
|
|
|
* @shrink: A shrink callback object used for buffer object swap.
|
2009-06-10 09:20:19 -04:00
|
|
|
* @ttm_bo_extra_size: Extra size (sizeof(struct ttm_buffer_object) excluded)
|
|
|
|
* used by a buffer object. This is excluding page arrays and backing pages.
|
|
|
|
* @ttm_bo_size: This is @ttm_bo_extra_size + sizeof(struct ttm_buffer_object).
|
2009-08-18 10:51:56 -04:00
|
|
|
* @device_list_mutex: Mutex protecting the device list.
|
|
|
|
* This mutex is held while traversing the device list for pm options.
|
|
|
|
* @lru_lock: Spinlock protecting the bo subsystem lru lists.
|
|
|
|
* @device_list: List of buffer object devices.
|
|
|
|
* @swap_lru: Lru list of buffer objects used for swapping.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct ttm_bo_global {
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Constant after init.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct kobject kobj;
|
|
|
|
struct ttm_mem_global *mem_glob;
|
|
|
|
struct page *dummy_read_page;
|
|
|
|
struct ttm_mem_shrink shrink;
|
|
|
|
size_t ttm_bo_extra_size;
|
|
|
|
size_t ttm_bo_size;
|
|
|
|
struct mutex device_list_mutex;
|
|
|
|
spinlock_t lru_lock;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Protected by device_list_mutex.
|
|
|
|
*/
|
|
|
|
struct list_head device_list;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Protected by the lru_lock.
|
|
|
|
*/
|
|
|
|
struct list_head swap_lru;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Internal protection.
|
|
|
|
*/
|
|
|
|
atomic_t bo_count;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
#define TTM_NUM_MEM_TYPES 8
|
|
|
|
|
|
|
|
#define TTM_BO_PRIV_FLAG_MOVING 0 /* Buffer object is moving and needs
|
|
|
|
idling before CPU mapping */
|
|
|
|
#define TTM_BO_PRIV_FLAG_MAX 1
|
|
|
|
/**
|
|
|
|
* struct ttm_bo_device - Buffer object driver device-specific data.
|
|
|
|
*
|
|
|
|
* @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
|
2009-06-10 09:20:19 -04:00
|
|
|
* @man: An array of mem_type_managers.
|
|
|
|
* @addr_space_mm: Range manager for the device address space.
|
|
|
|
* lru_lock: Spinlock that protects the buffer+device lru lists and
|
|
|
|
* ddestroy lists.
|
|
|
|
* @nice_mode: Try nicely to wait for buffer idle when cleaning a manager.
|
|
|
|
* If a GPU lockup has been detected, this is forced to 0.
|
|
|
|
* @dev_mapping: A pointer to the struct address_space representing the
|
|
|
|
* device address space.
|
|
|
|
* @wq: Work queue structure for the delayed delete workqueue.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct ttm_bo_device {
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Constant after bo device init / atomic.
|
|
|
|
*/
|
2009-08-18 10:51:56 -04:00
|
|
|
struct list_head device_list;
|
|
|
|
struct ttm_bo_global *glob;
|
2009-06-10 09:20:19 -04:00
|
|
|
struct ttm_bo_driver *driver;
|
|
|
|
rwlock_t vm_lock;
|
2009-08-18 10:51:56 -04:00
|
|
|
struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
|
2009-06-10 09:20:19 -04:00
|
|
|
/*
|
|
|
|
* Protected by the vm lock.
|
|
|
|
*/
|
|
|
|
struct rb_root addr_space_rb;
|
|
|
|
struct drm_mm addr_space_mm;
|
|
|
|
|
|
|
|
/*
|
2009-08-18 10:51:56 -04:00
|
|
|
* Protected by the global:lru lock.
|
2009-06-10 09:20:19 -04:00
|
|
|
*/
|
|
|
|
struct list_head ddestroy;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Protected by load / firstopen / lastclose /unload sync.
|
|
|
|
*/
|
|
|
|
|
|
|
|
bool nice_mode;
|
|
|
|
struct address_space *dev_mapping;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Internal protection.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct delayed_work wq;
|
2009-07-10 08:36:26 -04:00
|
|
|
|
|
|
|
bool need_dma32;
|
2009-06-10 09:20:19 -04:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_flag_masked
|
|
|
|
*
|
|
|
|
* @old: Pointer to the result and original value.
|
|
|
|
* @new: New value of bits.
|
|
|
|
* @mask: Mask of bits to change.
|
|
|
|
*
|
|
|
|
* Convenience function to change a number of bits identified by a mask.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static inline uint32_t
|
|
|
|
ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask)
|
|
|
|
{
|
|
|
|
*old ^= (*old ^ new) & mask;
|
|
|
|
return *old;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_tt_create
|
|
|
|
*
|
|
|
|
* @bdev: pointer to a struct ttm_bo_device:
|
|
|
|
* @size: Size of the data needed backing.
|
|
|
|
* @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
|
|
|
|
* @dummy_read_page: See struct ttm_bo_device.
|
|
|
|
*
|
|
|
|
* Create a struct ttm_tt to back data with system memory pages.
|
|
|
|
* No pages are actually allocated.
|
|
|
|
* Returns:
|
|
|
|
* NULL: Out of memory.
|
|
|
|
*/
|
|
|
|
extern struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev,
|
|
|
|
unsigned long size,
|
|
|
|
uint32_t page_flags,
|
|
|
|
struct page *dummy_read_page);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_tt_set_user:
|
|
|
|
*
|
|
|
|
* @ttm: The struct ttm_tt to populate.
|
|
|
|
* @tsk: A struct task_struct for which @start is a valid user-space address.
|
|
|
|
* @start: A valid user-space address.
|
|
|
|
* @num_pages: Size in pages of the user memory area.
|
|
|
|
*
|
|
|
|
* Populate a struct ttm_tt with a user-space memory area after first pinning
|
|
|
|
* the pages backing it.
|
|
|
|
* Returns:
|
|
|
|
* !0: Error.
|
|
|
|
*/
|
|
|
|
|
|
|
|
extern int ttm_tt_set_user(struct ttm_tt *ttm,
|
|
|
|
struct task_struct *tsk,
|
|
|
|
unsigned long start, unsigned long num_pages);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_ttm_bind:
|
|
|
|
*
|
|
|
|
* @ttm: The struct ttm_tt containing backing pages.
|
|
|
|
* @bo_mem: The struct ttm_mem_reg identifying the binding location.
|
|
|
|
*
|
|
|
|
* Bind the pages of @ttm to an aperture location identified by @bo_mem
|
|
|
|
*/
|
|
|
|
extern int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem);
|
|
|
|
|
2009-12-06 15:46:27 -05:00
|
|
|
/**
|
|
|
|
* ttm_tt_populate:
|
|
|
|
*
|
|
|
|
* @ttm: The struct ttm_tt to contain the backing pages.
|
|
|
|
*
|
|
|
|
* Add backing pages to all of @ttm
|
|
|
|
*/
|
|
|
|
extern int ttm_tt_populate(struct ttm_tt *ttm);
|
|
|
|
|
2009-06-10 09:20:19 -04:00
|
|
|
/**
|
|
|
|
* ttm_ttm_destroy:
|
|
|
|
*
|
|
|
|
* @ttm: The struct ttm_tt.
|
|
|
|
*
|
|
|
|
* Unbind, unpopulate and destroy a struct ttm_tt.
|
|
|
|
*/
|
|
|
|
extern void ttm_tt_destroy(struct ttm_tt *ttm);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_ttm_unbind:
|
|
|
|
*
|
|
|
|
* @ttm: The struct ttm_tt.
|
|
|
|
*
|
|
|
|
* Unbind a struct ttm_tt.
|
|
|
|
*/
|
|
|
|
extern void ttm_tt_unbind(struct ttm_tt *ttm);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_ttm_destroy:
|
|
|
|
*
|
|
|
|
* @ttm: The struct ttm_tt.
|
|
|
|
* @index: Index of the desired page.
|
|
|
|
*
|
|
|
|
* Return a pointer to the struct page backing @ttm at page
|
|
|
|
* index @index. If the page is unpopulated, one will be allocated to
|
|
|
|
* populate that index.
|
|
|
|
*
|
|
|
|
* Returns:
|
|
|
|
* NULL on OOM.
|
|
|
|
*/
|
|
|
|
extern struct page *ttm_tt_get_page(struct ttm_tt *ttm, int index);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_tt_cache_flush:
|
|
|
|
*
|
|
|
|
* @pages: An array of pointers to struct page:s to flush.
|
|
|
|
* @num_pages: Number of pages to flush.
|
|
|
|
*
|
|
|
|
* Flush the data of the indicated pages from the cpu caches.
|
|
|
|
* This is used when changing caching attributes of the pages from
|
|
|
|
* cache-coherent.
|
|
|
|
*/
|
|
|
|
extern void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_tt_set_placement_caching:
|
|
|
|
*
|
|
|
|
* @ttm A struct ttm_tt the backing pages of which will change caching policy.
|
|
|
|
* @placement: Flag indicating the desired caching policy.
|
|
|
|
*
|
|
|
|
* This function will change caching policy of any default kernel mappings of
|
|
|
|
* the pages backing @ttm. If changing from cached to uncached or
|
|
|
|
* write-combined,
|
|
|
|
* all CPU caches will first be flushed to make sure the data of the pages
|
|
|
|
* hit RAM. This function may be very costly as it involves global TLB
|
|
|
|
* and cache flushes and potential page splitting / combining.
|
|
|
|
*/
|
|
|
|
extern int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement);
|
|
|
|
extern int ttm_tt_swapout(struct ttm_tt *ttm,
|
|
|
|
struct file *persistant_swap_storage);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ttm_bo.c
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_mem_reg_is_pci
|
|
|
|
*
|
|
|
|
* @bdev: Pointer to a struct ttm_bo_device.
|
|
|
|
* @mem: A valid struct ttm_mem_reg.
|
|
|
|
*
|
|
|
|
* Returns true if the memory described by @mem is PCI memory,
|
|
|
|
* false otherwise.
|
|
|
|
*/
|
|
|
|
extern bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev,
|
|
|
|
struct ttm_mem_reg *mem);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_bo_mem_space
|
|
|
|
*
|
|
|
|
* @bo: Pointer to a struct ttm_buffer_object. the data of which
|
|
|
|
* we want to allocate space for.
|
|
|
|
* @proposed_placement: Proposed new placement for the buffer object.
|
|
|
|
* @mem: A struct ttm_mem_reg.
|
|
|
|
* @interruptible: Sleep interruptible when sliping.
|
2010-04-07 06:21:19 -04:00
|
|
|
* @no_wait_reserve: Return immediately if other buffers are busy.
|
|
|
|
* @no_wait_gpu: Return immediately if the GPU is busy.
|
2009-06-10 09:20:19 -04:00
|
|
|
*
|
|
|
|
* Allocate memory space for the buffer object pointed to by @bo, using
|
|
|
|
* the placement flags in @mem, potentially evicting other idle buffer objects.
|
|
|
|
* This function may sleep while waiting for space to become available.
|
|
|
|
* Returns:
|
|
|
|
* -EBUSY: No space available (only if no_wait == 1).
|
|
|
|
* -ENOMEM: Could not allocate memory for the buffer object, either due to
|
|
|
|
* fragmentation or concurrent allocators.
|
2009-12-07 12:36:18 -05:00
|
|
|
* -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
|
2009-06-10 09:20:19 -04:00
|
|
|
*/
|
|
|
|
extern int ttm_bo_mem_space(struct ttm_buffer_object *bo,
|
2009-12-08 09:33:32 -05:00
|
|
|
struct ttm_placement *placement,
|
|
|
|
struct ttm_mem_reg *mem,
|
2010-04-07 06:21:19 -04:00
|
|
|
bool interruptible,
|
|
|
|
bool no_wait_reserve, bool no_wait_gpu);
|
2009-06-10 09:20:19 -04:00
|
|
|
/**
|
|
|
|
* ttm_bo_wait_for_cpu
|
|
|
|
*
|
|
|
|
* @bo: Pointer to a struct ttm_buffer_object.
|
|
|
|
* @no_wait: Don't sleep while waiting.
|
|
|
|
*
|
|
|
|
* Wait until a buffer object is no longer sync'ed for CPU access.
|
|
|
|
* Returns:
|
|
|
|
* -EBUSY: Buffer object was sync'ed for CPU access. (only if no_wait == 1).
|
2009-12-07 12:36:18 -05:00
|
|
|
* -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
|
2009-06-10 09:20:19 -04:00
|
|
|
*/
|
|
|
|
|
|
|
|
extern int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_bo_pci_offset - Get the PCI offset for the buffer object memory.
|
|
|
|
*
|
|
|
|
* @bo Pointer to a struct ttm_buffer_object.
|
|
|
|
* @bus_base On return the base of the PCI region
|
|
|
|
* @bus_offset On return the byte offset into the PCI region
|
|
|
|
* @bus_size On return the byte size of the buffer object or zero if
|
|
|
|
* the buffer object memory is not accessible through a PCI region.
|
|
|
|
*
|
|
|
|
* Returns:
|
|
|
|
* -EINVAL if the buffer object is currently not mappable.
|
|
|
|
* 0 otherwise.
|
|
|
|
*/
|
|
|
|
|
|
|
|
extern int ttm_bo_pci_offset(struct ttm_bo_device *bdev,
|
|
|
|
struct ttm_mem_reg *mem,
|
|
|
|
unsigned long *bus_base,
|
|
|
|
unsigned long *bus_offset,
|
|
|
|
unsigned long *bus_size);
|
|
|
|
|
2010-04-09 08:39:23 -04:00
|
|
|
extern int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
|
|
|
|
struct ttm_mem_reg *mem);
|
|
|
|
extern void ttm_mem_io_free(struct ttm_bo_device *bdev,
|
|
|
|
struct ttm_mem_reg *mem);
|
|
|
|
|
2009-08-18 10:51:56 -04:00
|
|
|
extern void ttm_bo_global_release(struct ttm_global_reference *ref);
|
|
|
|
extern int ttm_bo_global_init(struct ttm_global_reference *ref);
|
|
|
|
|
2009-06-10 09:20:19 -04:00
|
|
|
extern int ttm_bo_device_release(struct ttm_bo_device *bdev);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_bo_device_init
|
|
|
|
*
|
|
|
|
* @bdev: A pointer to a struct ttm_bo_device to initialize.
|
|
|
|
* @mem_global: A pointer to an initialized struct ttm_mem_global.
|
|
|
|
* @driver: A pointer to a struct ttm_bo_driver set up by the caller.
|
|
|
|
* @file_page_offset: Offset into the device address space that is available
|
|
|
|
* for buffer data. This ensures compatibility with other users of the
|
|
|
|
* address space.
|
|
|
|
*
|
|
|
|
* Initializes a struct ttm_bo_device:
|
|
|
|
* Returns:
|
|
|
|
* !0: Failure.
|
|
|
|
*/
|
|
|
|
extern int ttm_bo_device_init(struct ttm_bo_device *bdev,
|
2009-08-18 10:51:56 -04:00
|
|
|
struct ttm_bo_global *glob,
|
2009-06-10 09:20:19 -04:00
|
|
|
struct ttm_bo_driver *driver,
|
2009-07-10 08:36:26 -04:00
|
|
|
uint64_t file_page_offset, bool need_dma32);
|
2009-06-10 09:20:19 -04:00
|
|
|
|
2009-06-23 19:48:08 -04:00
|
|
|
/**
|
|
|
|
* ttm_bo_unmap_virtual
|
|
|
|
*
|
|
|
|
* @bo: tear down the virtual mappings for this BO
|
|
|
|
*/
|
|
|
|
extern void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
|
2009-06-10 09:20:19 -04:00
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_bo_reserve:
|
|
|
|
*
|
|
|
|
* @bo: A pointer to a struct ttm_buffer_object.
|
|
|
|
* @interruptible: Sleep interruptible if waiting.
|
|
|
|
* @no_wait: Don't sleep while trying to reserve, rather return -EBUSY.
|
|
|
|
* @use_sequence: If @bo is already reserved, Only sleep waiting for
|
|
|
|
* it to become unreserved if @sequence < (@bo)->sequence.
|
|
|
|
*
|
|
|
|
* Locks a buffer object for validation. (Or prevents other processes from
|
|
|
|
* locking it for validation) and removes it from lru lists, while taking
|
|
|
|
* a number of measures to prevent deadlocks.
|
|
|
|
*
|
|
|
|
* Deadlocks may occur when two processes try to reserve multiple buffers in
|
|
|
|
* different order, either by will or as a result of a buffer being evicted
|
|
|
|
* to make room for a buffer already reserved. (Buffers are reserved before
|
|
|
|
* they are evicted). The following algorithm prevents such deadlocks from
|
|
|
|
* occuring:
|
|
|
|
* 1) Buffers are reserved with the lru spinlock held. Upon successful
|
|
|
|
* reservation they are removed from the lru list. This stops a reserved buffer
|
|
|
|
* from being evicted. However the lru spinlock is released between the time
|
|
|
|
* a buffer is selected for eviction and the time it is reserved.
|
|
|
|
* Therefore a check is made when a buffer is reserved for eviction, that it
|
|
|
|
* is still the first buffer in the lru list, before it is removed from the
|
|
|
|
* list. @check_lru == 1 forces this check. If it fails, the function returns
|
|
|
|
* -EINVAL, and the caller should then choose a new buffer to evict and repeat
|
|
|
|
* the procedure.
|
|
|
|
* 2) Processes attempting to reserve multiple buffers other than for eviction,
|
|
|
|
* (typically execbuf), should first obtain a unique 32-bit
|
|
|
|
* validation sequence number,
|
|
|
|
* and call this function with @use_sequence == 1 and @sequence == the unique
|
|
|
|
* sequence number. If upon call of this function, the buffer object is already
|
|
|
|
* reserved, the validation sequence is checked against the validation
|
|
|
|
* sequence of the process currently reserving the buffer,
|
|
|
|
* and if the current validation sequence is greater than that of the process
|
|
|
|
* holding the reservation, the function returns -EAGAIN. Otherwise it sleeps
|
|
|
|
* waiting for the buffer to become unreserved, after which it retries
|
|
|
|
* reserving.
|
|
|
|
* The caller should, when receiving an -EAGAIN error
|
|
|
|
* release all its buffer reservations, wait for @bo to become unreserved, and
|
|
|
|
* then rerun the validation with the same validation sequence. This procedure
|
|
|
|
* will always guarantee that the process with the lowest validation sequence
|
|
|
|
* will eventually succeed, preventing both deadlocks and starvation.
|
|
|
|
*
|
|
|
|
* Returns:
|
|
|
|
* -EAGAIN: The reservation may cause a deadlock.
|
|
|
|
* Release all buffer reservations, wait for @bo to become unreserved and
|
|
|
|
* try again. (only if use_sequence == 1).
|
2009-12-07 12:36:18 -05:00
|
|
|
* -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
|
2009-06-10 09:20:19 -04:00
|
|
|
* a signal. Release all buffer reservations and return to user-space.
|
|
|
|
*/
|
|
|
|
extern int ttm_bo_reserve(struct ttm_buffer_object *bo,
|
|
|
|
bool interruptible,
|
|
|
|
bool no_wait, bool use_sequence, uint32_t sequence);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_bo_unreserve
|
|
|
|
*
|
|
|
|
* @bo: A pointer to a struct ttm_buffer_object.
|
|
|
|
*
|
|
|
|
* Unreserve a previous reservation of @bo.
|
|
|
|
*/
|
|
|
|
extern void ttm_bo_unreserve(struct ttm_buffer_object *bo);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_bo_wait_unreserved
|
|
|
|
*
|
|
|
|
* @bo: A pointer to a struct ttm_buffer_object.
|
|
|
|
*
|
|
|
|
* Wait for a struct ttm_buffer_object to become unreserved.
|
|
|
|
* This is typically used in the execbuf code to relax cpu-usage when
|
|
|
|
* a potential deadlock condition backoff.
|
|
|
|
*/
|
|
|
|
extern int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo,
|
|
|
|
bool interruptible);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ttm_bo_util.c
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_bo_move_ttm
|
|
|
|
*
|
|
|
|
* @bo: A pointer to a struct ttm_buffer_object.
|
|
|
|
* @evict: 1: This is an eviction. Don't try to pipeline.
|
2010-04-07 06:21:19 -04:00
|
|
|
* @no_wait_reserve: Return immediately if other buffers are busy.
|
|
|
|
* @no_wait_gpu: Return immediately if the GPU is busy.
|
2009-06-10 09:20:19 -04:00
|
|
|
* @new_mem: struct ttm_mem_reg indicating where to move.
|
|
|
|
*
|
|
|
|
* Optimized move function for a buffer object with both old and
|
|
|
|
* new placement backed by a TTM. The function will, if successful,
|
|
|
|
* free any old aperture space, and set (@new_mem)->mm_node to NULL,
|
|
|
|
* and update the (@bo)->mem placement flags. If unsuccessful, the old
|
|
|
|
* data remains untouched, and it's up to the caller to free the
|
|
|
|
* memory space indicated by @new_mem.
|
|
|
|
* Returns:
|
|
|
|
* !0: Failure.
|
|
|
|
*/
|
|
|
|
|
|
|
|
extern int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
|
2010-04-07 06:21:19 -04:00
|
|
|
bool evict, bool no_wait_reserve,
|
|
|
|
bool no_wait_gpu, struct ttm_mem_reg *new_mem);
|
2009-06-10 09:20:19 -04:00
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_bo_move_memcpy
|
|
|
|
*
|
|
|
|
* @bo: A pointer to a struct ttm_buffer_object.
|
|
|
|
* @evict: 1: This is an eviction. Don't try to pipeline.
|
2010-04-07 06:21:19 -04:00
|
|
|
* @no_wait_reserve: Return immediately if other buffers are busy.
|
|
|
|
* @no_wait_gpu: Return immediately if the GPU is busy.
|
2009-06-10 09:20:19 -04:00
|
|
|
* @new_mem: struct ttm_mem_reg indicating where to move.
|
|
|
|
*
|
|
|
|
* Fallback move function for a mappable buffer object in mappable memory.
|
|
|
|
* The function will, if successful,
|
|
|
|
* free any old aperture space, and set (@new_mem)->mm_node to NULL,
|
|
|
|
* and update the (@bo)->mem placement flags. If unsuccessful, the old
|
|
|
|
* data remains untouched, and it's up to the caller to free the
|
|
|
|
* memory space indicated by @new_mem.
|
|
|
|
* Returns:
|
|
|
|
* !0: Failure.
|
|
|
|
*/
|
|
|
|
|
|
|
|
extern int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
|
2010-04-07 06:21:19 -04:00
|
|
|
bool evict, bool no_wait_reserve,
|
|
|
|
bool no_wait_gpu, struct ttm_mem_reg *new_mem);
|
2009-06-10 09:20:19 -04:00
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_bo_free_old_node
|
|
|
|
*
|
|
|
|
* @bo: A pointer to a struct ttm_buffer_object.
|
|
|
|
*
|
|
|
|
* Utility function to free an old placement after a successful move.
|
|
|
|
*/
|
|
|
|
extern void ttm_bo_free_old_node(struct ttm_buffer_object *bo);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_bo_move_accel_cleanup.
|
|
|
|
*
|
|
|
|
* @bo: A pointer to a struct ttm_buffer_object.
|
|
|
|
* @sync_obj: A sync object that signals when moving is complete.
|
|
|
|
* @sync_obj_arg: An argument to pass to the sync object idle / wait
|
|
|
|
* functions.
|
|
|
|
* @evict: This is an evict move. Don't return until the buffer is idle.
|
2010-04-07 06:21:19 -04:00
|
|
|
* @no_wait_reserve: Return immediately if other buffers are busy.
|
|
|
|
* @no_wait_gpu: Return immediately if the GPU is busy.
|
2009-06-10 09:20:19 -04:00
|
|
|
* @new_mem: struct ttm_mem_reg indicating where to move.
|
|
|
|
*
|
|
|
|
* Accelerated move function to be called when an accelerated move
|
|
|
|
* has been scheduled. The function will create a new temporary buffer object
|
|
|
|
* representing the old placement, and put the sync object on both buffer
|
|
|
|
* objects. After that the newly created buffer object is unref'd to be
|
|
|
|
* destroyed when the move is complete. This will help pipeline
|
|
|
|
* buffer moves.
|
|
|
|
*/
|
|
|
|
|
|
|
|
extern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
|
|
|
|
void *sync_obj,
|
|
|
|
void *sync_obj_arg,
|
2010-04-07 06:21:19 -04:00
|
|
|
bool evict, bool no_wait_reserve,
|
|
|
|
bool no_wait_gpu,
|
2009-06-10 09:20:19 -04:00
|
|
|
struct ttm_mem_reg *new_mem);
|
|
|
|
/**
|
|
|
|
* ttm_io_prot
|
|
|
|
*
|
|
|
|
* @c_state: Caching state.
|
|
|
|
* @tmp: Page protection flag for a normal, cached mapping.
|
|
|
|
*
|
|
|
|
* Utility function that returns the pgprot_t that should be used for
|
|
|
|
* setting up a PTE with the caching model indicated by @c_state.
|
|
|
|
*/
|
2010-02-24 17:29:14 -05:00
|
|
|
extern pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp);
|
2009-06-10 09:20:19 -04:00
|
|
|
|
|
|
|
#if (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
|
|
|
|
#define TTM_HAS_AGP
|
|
|
|
#include <linux/agp_backend.h>
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ttm_agp_backend_init
|
|
|
|
*
|
|
|
|
* @bdev: Pointer to a struct ttm_bo_device.
|
|
|
|
* @bridge: The agp bridge this device is sitting on.
|
|
|
|
*
|
|
|
|
* Create a TTM backend that uses the indicated AGP bridge as an aperture
|
|
|
|
* for TT memory. This function uses the linux agpgart interface to
|
|
|
|
* bind and unbind memory backing a ttm_tt.
|
|
|
|
*/
|
|
|
|
extern struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
|
|
|
|
struct agp_bridge_data *bridge);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#endif
|