1247835Skib/************************************************************************** 2247835Skib * 3247835Skib * Copyright (c) 2007-2010 VMware, Inc., Palo Alto, CA., USA 4247835Skib * All Rights Reserved. 5247835Skib * 6247835Skib * Permission is hereby granted, free of charge, to any person obtaining a 7247835Skib * copy of this software and associated documentation files (the 8247835Skib * "Software"), to deal in the Software without restriction, including 9247835Skib * without limitation the rights to use, copy, modify, merge, publish, 10247835Skib * distribute, sub license, and/or sell copies of the Software, and to 11247835Skib * permit persons to whom the Software is furnished to do so, subject to 12247835Skib * the following conditions: 13247835Skib * 14247835Skib * The above copyright notice and this permission notice (including the 15247835Skib * next paragraph) shall be included in all copies or substantial portions 16247835Skib * of the Software. 17247835Skib * 18247835Skib * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19247835Skib * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20247835Skib * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21247835Skib * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22247835Skib * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23247835Skib * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24247835Skib * USE OR OTHER DEALINGS IN THE SOFTWARE. 25247835Skib * 26247835Skib **************************************************************************/ 27247835Skib/* 28247835Skib * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> 29247835Skib */ 30247835Skib 31247835Skib#include <sys/cdefs.h> 32247835Skib__FBSDID("$FreeBSD$"); 33247835Skib 34247835Skib#include <dev/drm2/drmP.h> 35247835Skib#include <dev/drm2/ttm/ttm_module.h> 36247835Skib#include <dev/drm2/ttm/ttm_bo_driver.h> 37247835Skib#include <dev/drm2/ttm/ttm_placement.h> 38247835Skib#include <dev/drm2/drm_mm.h> 39247835Skib 40247835Skib/** 41247835Skib * Currently we use a spinlock for the lock, but a mutex *may* be 42247835Skib * more appropriate to reduce scheduling latency if the range manager 43247835Skib * ends up with very fragmented allocation patterns. 44247835Skib */ 45247835Skib 46247835Skibstruct ttm_range_manager { 47247835Skib struct drm_mm mm; 48247835Skib struct mtx lock; 49247835Skib}; 50247835Skib 51247835SkibMALLOC_DEFINE(M_TTM_RMAN, "ttm_rman", "TTM Range Manager"); 52247835Skib 53247835Skibstatic int ttm_bo_man_get_node(struct ttm_mem_type_manager *man, 54247835Skib struct ttm_buffer_object *bo, 55247835Skib struct ttm_placement *placement, 56247835Skib struct ttm_mem_reg *mem) 57247835Skib{ 58247835Skib struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv; 59247835Skib struct drm_mm *mm = &rman->mm; 60247835Skib struct drm_mm_node *node = NULL; 61247835Skib unsigned long lpfn; 62247835Skib int ret; 63247835Skib 64247835Skib lpfn = placement->lpfn; 65247835Skib if (!lpfn) 66247835Skib lpfn = man->size; 67247835Skib do { 68247835Skib ret = drm_mm_pre_get(mm); 69247835Skib if (unlikely(ret)) 70247835Skib return ret; 71247835Skib 72247835Skib mtx_lock(&rman->lock); 73247835Skib node = drm_mm_search_free_in_range(mm, 74247835Skib mem->num_pages, mem->page_alignment, 75247835Skib placement->fpfn, lpfn, 1); 76247835Skib if (unlikely(node == NULL)) { 77247835Skib mtx_unlock(&rman->lock); 78247835Skib return 0; 79247835Skib } 80247835Skib node = drm_mm_get_block_atomic_range(node, mem->num_pages, 81247835Skib mem->page_alignment, 82247835Skib placement->fpfn, 83247835Skib lpfn); 84247835Skib mtx_unlock(&rman->lock); 85247835Skib } while (node == NULL); 86247835Skib 87247835Skib mem->mm_node = node; 88247835Skib mem->start = node->start; 89247835Skib return 0; 90247835Skib} 91247835Skib 92247835Skibstatic void ttm_bo_man_put_node(struct ttm_mem_type_manager *man, 93247835Skib struct ttm_mem_reg *mem) 94247835Skib{ 95247835Skib struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv; 96247835Skib 97247835Skib if (mem->mm_node) { 98247835Skib mtx_lock(&rman->lock); 99247835Skib drm_mm_put_block(mem->mm_node); 100247835Skib mtx_unlock(&rman->lock); 101247835Skib mem->mm_node = NULL; 102247835Skib } 103247835Skib} 104247835Skib 105247835Skibstatic int ttm_bo_man_init(struct ttm_mem_type_manager *man, 106247835Skib unsigned long p_size) 107247835Skib{ 108247835Skib struct ttm_range_manager *rman; 109247835Skib int ret; 110247835Skib 111247835Skib rman = malloc(sizeof(*rman), M_TTM_RMAN, M_ZERO | M_WAITOK); 112247835Skib ret = drm_mm_init(&rman->mm, 0, p_size); 113247835Skib if (ret) { 114247835Skib free(rman, M_TTM_RMAN); 115247835Skib return ret; 116247835Skib } 117247835Skib 118247835Skib mtx_init(&rman->lock, "ttmrman", NULL, MTX_DEF); 119247835Skib man->priv = rman; 120247835Skib return 0; 121247835Skib} 122247835Skib 123247835Skibstatic int ttm_bo_man_takedown(struct ttm_mem_type_manager *man) 124247835Skib{ 125247835Skib struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv; 126247835Skib struct drm_mm *mm = &rman->mm; 127247835Skib 128247835Skib mtx_lock(&rman->lock); 129247835Skib if (drm_mm_clean(mm)) { 130247835Skib drm_mm_takedown(mm); 131247835Skib mtx_unlock(&rman->lock); 132247835Skib mtx_destroy(&rman->lock); 133247835Skib free(rman, M_TTM_RMAN); 134247835Skib man->priv = NULL; 135247835Skib return 0; 136247835Skib } 137247835Skib mtx_unlock(&rman->lock); 138247835Skib return -EBUSY; 139247835Skib} 140247835Skib 141247835Skibstatic void ttm_bo_man_debug(struct ttm_mem_type_manager *man, 142247835Skib const char *prefix) 143247835Skib{ 144247835Skib struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv; 145247835Skib 146247835Skib mtx_lock(&rman->lock); 147247835Skib drm_mm_debug_table(&rman->mm, prefix); 148247835Skib mtx_unlock(&rman->lock); 149247835Skib} 150247835Skib 151247835Skibconst struct ttm_mem_type_manager_func ttm_bo_manager_func = { 152247835Skib ttm_bo_man_init, 153247835Skib ttm_bo_man_takedown, 154247835Skib ttm_bo_man_get_node, 155247835Skib ttm_bo_man_put_node, 156247835Skib ttm_bo_man_debug 157247835Skib}; 158