From 135cba0dc399fdd47bd3ae305c1db75fcd77243f Mon Sep 17 00:00:00 2001 From: Thomas Hellstrom Date: Tue, 26 Oct 2010 21:21:47 +0200 Subject: vmwgfx: Implement a proper GMR eviction mechanism Use Ben's new range manager hooks to implement a manager for GMRs that manages ids rather than ranges. This means we can use the standard TTM code for binding, unbinding and eviction. Signed-off-by: Thomas Hellstrom Signed-off-by: Dave Airlie --- drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c | 137 ++++++++++++++++++++++++++ 1 file changed, 137 insertions(+) create mode 100644 drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c') diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c new file mode 100644 index 000000000000..ac6e0d1bd629 --- /dev/null +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c @@ -0,0 +1,137 @@ +/************************************************************************** + * + * Copyright (c) 2007-2010 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 + */ + +#include "vmwgfx_drv.h" +#include "ttm/ttm_module.h" +#include "ttm/ttm_bo_driver.h" +#include "ttm/ttm_placement.h" +#include +#include +#include + +struct vmwgfx_gmrid_man { + spinlock_t lock; + struct ida gmr_ida; + uint32_t max_gmr_ids; +}; + +static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man, + struct ttm_buffer_object *bo, + struct ttm_placement *placement, + struct ttm_mem_reg *mem) +{ + struct vmwgfx_gmrid_man *gman = + (struct vmwgfx_gmrid_man *)man->priv; + int ret; + int id; + + mem->mm_node = NULL; + + do { + if (unlikely(ida_pre_get(&gman->gmr_ida, GFP_KERNEL) == 0)) + return -ENOMEM; + + spin_lock(&gman->lock); + ret = ida_get_new(&gman->gmr_ida, &id); + + if (unlikely(ret == 0 && id >= gman->max_gmr_ids)) { + ida_remove(&gman->gmr_ida, id); + spin_unlock(&gman->lock); + return 0; + } + + spin_unlock(&gman->lock); + + } while (ret == -EAGAIN); + + if (likely(ret == 0)) { + mem->mm_node = gman; + mem->start = id; + } + + return ret; +} + +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) { + spin_lock(&gman->lock); + ida_remove(&gman->gmr_ida, mem->start); + 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 vmwgfx_gmrid_man *gman = + kzalloc(sizeof(*gman), GFP_KERNEL); + + if (unlikely(gman == NULL)) + return -ENOMEM; + + spin_lock_init(&gman->lock); + ida_init(&gman->gmr_ida); + gman->max_gmr_ids = p_size; + 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; +} + +static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man, + const char *prefix) +{ + printk(KERN_INFO "%s: No debug info available for the GMR " + "id manager.\n", prefix); +} + +const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = { + vmw_gmrid_man_init, + vmw_gmrid_man_takedown, + vmw_gmrid_man_get_node, + vmw_gmrid_man_put_node, + vmw_gmrid_man_debug +}; -- cgit v1.2.3