// SPDX-License-Identifier: GPL-2.0 OR MIT /************************************************************************** * * Copyright 2007-2010 VMware, Inc., Palo Alto, CA., USA * * 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 */ #include "vmwgfx_drv.h" #include #include #include #include #include #include struct vmwgfx_gmrid_man { spinlock_t lock; struct ida gmr_ida; uint32_t max_gmr_ids; uint32_t max_gmr_pages; uint32_t used_gmr_pages; }; static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man, struct ttm_buffer_object *bo, const struct ttm_place *place, struct ttm_mem_reg *mem) { struct vmwgfx_gmrid_man *gman = (struct vmwgfx_gmrid_man *)man->priv; int id; id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL); if (id < 0) return (id != -ENOMEM ? 0 : id); spin_lock(&gman->lock); if (gman->max_gmr_pages > 0) { gman->used_gmr_pages += bo->num_pages; if (unlikely(gman->used_gmr_pages > gman->max_gmr_pages)) goto nospace; } mem->mm_node = gman; mem->start = id; mem->num_pages = bo->num_pages; spin_unlock(&gman->lock); return 0; nospace: gman->used_gmr_pages -= bo->num_pages; spin_unlock(&gman->lock); ida_free(&gman->gmr_ida, id); return -ENOSPC; } static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man, struct ttm_mem_reg *mem) { struct vmwgfx_gmrid_man *gman = (struct vmwgfx_gmrid_man *)man->priv; if (mem->mm_node) { ida_free(&gman->gmr_ida, mem->start); spin_lock(&gman->lock); gman->used_gmr_pages -= mem->num_pages; spin_unlock(&gman->lock); mem->mm_node = NULL; } } static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man, unsigned long p_size) { struct vmw_private *dev_priv = container_of(man->bdev, struct vmw_private, bdev); struct vmwgfx_gmrid_man *gman = kzalloc(sizeof(*gman), GFP_KERNEL); if (unlikely(!gman)) return -ENOMEM; spin_lock_init(&gman->lock); gman->used_gmr_pages = 0; ida_init(&gman->gmr_ida); switch (p_size) { case VMW_PL_GMR: gman->max_gmr_ids = dev_priv->max_gmr_ids; gman->max_gmr_pages = dev_priv->max_gmr_pages; break; case VMW_PL_MOB: gman->max_gmr_ids = VMWGFX_NUM_MOB; gman->max_gmr_pages = dev_priv->max_mob_pages; break; default: BUG(); } man->priv = (void *) gman; return 0; } static int vmw_gmrid_man_takedown(struct ttm_mem_type_manager *man) { struct vmwgfx_gmrid_man *gman = (struct vmwgfx_gmrid_man *)man->priv; if (gman) { ida_destroy(&gman->gmr_ida); kfree(gman); } return 0; } const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = { .init = vmw_gmrid_man_init, .takedown = vmw_gmrid_man_takedown, .get_node = vmw_gmrid_man_get_node, .put_node = vmw_gmrid_man_put_node, };