/************************************************************************** * * Copyright (c) 2006-2009 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. * **************************************************************************/ /* * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> * Keith Packard. */ #include "ttm/ttm_module.h" #include "ttm/ttm_bo_driver.h" #include "ttm/ttm_page_alloc.h" #ifdef TTM_HAS_AGP #include "ttm/ttm_placement.h" #include <linux/agp_backend.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/io.h> #include <asm/agp.h> struct ttm_agp_backend { struct ttm_tt ttm; struct agp_memory *mem; struct agp_bridge_data *bridge; }; static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem) { struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); struct drm_mm_node *node = bo_mem->mm_node; struct agp_memory *mem; int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED); unsigned i; mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY); if (unlikely(mem == NULL)) return -ENOMEM; mem->page_count = 0; for (i = 0; i < ttm->num_pages; i++) { struct page *page = ttm->pages[i]; if (!page) page = ttm->dummy_read_page; mem->pages[mem->page_count++] = page; } agp_be->mem = mem; mem->is_flushed = 1; mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY; ret = agp_bind_memory(mem, node->start); if (ret) printk(KERN_ERR TTM_PFX "AGP Bind memory failed.\n"); return ret; } static int ttm_agp_unbind(struct ttm_tt *ttm) { struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); if (agp_be->mem) { if (agp_be->mem->is_bound) return agp_unbind_memory(agp_be->mem); agp_free_memory(agp_be->mem); agp_be->mem = NULL; } return 0; } static void ttm_agp_destroy(struct ttm_tt *ttm) { struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); if (agp_be->mem) ttm_agp_unbind(ttm); ttm_tt_fini(ttm); kfree(agp_be); } static struct ttm_backend_func ttm_agp_func = { .bind = ttm_agp_bind, .unbind = ttm_agp_unbind, .destroy = ttm_agp_destroy, }; struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev, struct agp_bridge_data *bridge, unsigned long size, uint32_t page_flags, struct page *dummy_read_page) { struct ttm_agp_backend *agp_be; agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL); if (!agp_be) return NULL; agp_be->mem = NULL; agp_be->bridge = bridge; agp_be->ttm.func = &ttm_agp_func; if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) { return NULL; } return &agp_be->ttm; } EXPORT_SYMBOL(ttm_agp_tt_create); int ttm_agp_tt_populate(struct ttm_tt *ttm) { if (ttm->state != tt_unpopulated) return 0; return ttm_pool_populate(ttm); } EXPORT_SYMBOL(ttm_agp_tt_populate); void ttm_agp_tt_unpopulate(struct ttm_tt *ttm) { ttm_pool_unpopulate(ttm); } EXPORT_SYMBOL(ttm_agp_tt_unpopulate); #endif