forked from Minki/linux
649bf3ca77
ttm_backend will only exist with a ttm_tt, and ttm_tt will only be of interest when bound to a backend. Merge them to avoid code and data duplication. V2 Rebase on top of memory accounting overhaul V3 Rebase on top of more memory accounting changes V4 Rebase on top of no memory account changes (where/when is my delorean when i need it ?) V5 make sure ttm is unbound before destroying, change commit message on suggestion from Tormod Volden Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/**************************************************************************
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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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* Keith Packard.
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*/
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#include "ttm/ttm_module.h"
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#include "ttm/ttm_bo_driver.h"
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#ifdef TTM_HAS_AGP
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#include "ttm/ttm_placement.h"
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#include <linux/agp_backend.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <asm/agp.h>
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struct ttm_agp_backend {
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struct ttm_tt ttm;
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struct agp_memory *mem;
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struct agp_bridge_data *bridge;
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};
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static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
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{
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struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
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struct drm_mm_node *node = bo_mem->mm_node;
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struct agp_memory *mem;
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int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
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unsigned i;
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mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
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if (unlikely(mem == NULL))
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return -ENOMEM;
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mem->page_count = 0;
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for (i = 0; i < ttm->num_pages; i++) {
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struct page *page = ttm->pages[i];
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if (!page)
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page = ttm->dummy_read_page;
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mem->pages[mem->page_count++] = page;
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}
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agp_be->mem = mem;
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mem->is_flushed = 1;
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mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
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ret = agp_bind_memory(mem, node->start);
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if (ret)
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printk(KERN_ERR TTM_PFX "AGP Bind memory failed.\n");
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return ret;
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}
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static int ttm_agp_unbind(struct ttm_tt *ttm)
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{
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struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
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if (agp_be->mem) {
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if (agp_be->mem->is_bound)
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return agp_unbind_memory(agp_be->mem);
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agp_free_memory(agp_be->mem);
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agp_be->mem = NULL;
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}
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return 0;
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}
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static void ttm_agp_destroy(struct ttm_tt *ttm)
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{
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struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
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if (agp_be->mem)
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ttm_agp_unbind(ttm);
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kfree(agp_be);
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}
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static struct ttm_backend_func ttm_agp_func = {
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.bind = ttm_agp_bind,
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.unbind = ttm_agp_unbind,
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.destroy = ttm_agp_destroy,
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};
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struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
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struct agp_bridge_data *bridge,
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unsigned long size, uint32_t page_flags,
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struct page *dummy_read_page)
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{
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struct ttm_agp_backend *agp_be;
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agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL);
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if (!agp_be)
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return NULL;
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agp_be->mem = NULL;
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agp_be->bridge = bridge;
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agp_be->ttm.func = &ttm_agp_func;
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if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
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return NULL;
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}
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return &agp_be->ttm;
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}
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EXPORT_SYMBOL(ttm_agp_tt_create);
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#endif
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