WebSVN – Kolibri OS – Blame – /drivers/video/drm/vmwgfx/vmwgfx_gmrid_manager.c

Rev	Author	Line No.	Line
4075	Serge	1	/**************************************************************************
		2	*
		3	* Copyright (c) 2007-2010 VMware, Inc., Palo Alto, CA., USA
		4	* All Rights Reserved.
		5	*
		6	* Permission is hereby granted, free of charge, to any person obtaining a
		7	* copy of this software and associated documentation files (the
		8	* "Software"), to deal in the Software without restriction, including
		9	* without limitation the rights to use, copy, modify, merge, publish,
		10	* distribute, sub license, and/or sell copies of the Software, and to
		11	* permit persons to whom the Software is furnished to do so, subject to
		12	* the following conditions:
		13	*
		14	* The above copyright notice and this permission notice (including the
		15	* next paragraph) shall be included in all copies or substantial portions
		16	* of the Software.
		17	*
		18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		20	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
		21	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
		22	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
		23	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
		24	* USE OR OTHER DEALINGS IN THE SOFTWARE.
		25	*
		26	**************************************************************************/
		27	/*
		28	* Authors: Thomas Hellstrom
		29	*/
		30
		31	#include "vmwgfx_drv.h"
		32	#include
		33	#include
		34	#include
		35	#include
		36	#include
		37	#include
		38
		39	struct vmwgfx_gmrid_man {
		40	spinlock_t lock;
		41	struct ida gmr_ida;
		42	uint32_t max_gmr_ids;
		43	uint32_t max_gmr_pages;
		44	uint32_t used_gmr_pages;
		45	};
		46
		47	static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man,
		48	struct ttm_buffer_object *bo,
		49	struct ttm_placement *placement,
5078	serge	50	uint32_t flags,
4075	Serge	51	struct ttm_mem_reg *mem)
		52	{
		53	struct vmwgfx_gmrid_man *gman =
		54	(struct vmwgfx_gmrid_man *)man->priv;
		55	int ret = 0;
		56	int id;
		57
		58	mem->mm_node = NULL;
		59
		60	spin_lock(&gman->lock);
		61
		62	if (gman->max_gmr_pages > 0) {
		63	gman->used_gmr_pages += bo->num_pages;
		64	if (unlikely(gman->used_gmr_pages > gman->max_gmr_pages))
		65	goto out_err_locked;
		66	}
		67
		68	do {
		69	spin_unlock(&gman->lock);
		70	if (unlikely(ida_pre_get(&gman->gmr_ida, GFP_KERNEL) == 0)) {
		71	ret = -ENOMEM;
		72	goto out_err;
		73	}
		74	spin_lock(&gman->lock);
		75
		76	ret = ida_get_new(&gman->gmr_ida, &id);
		77	if (unlikely(ret == 0 && id >= gman->max_gmr_ids)) {
		78	ida_remove(&gman->gmr_ida, id);
		79	ret = 0;
		80	goto out_err_locked;
		81	}
		82	} while (ret == -EAGAIN);
		83
		84	if (likely(ret == 0)) {
		85	mem->mm_node = gman;
		86	mem->start = id;
		87	mem->num_pages = bo->num_pages;
		88	} else
		89	goto out_err_locked;
		90
		91	spin_unlock(&gman->lock);
		92	return 0;
		93
		94	out_err:
		95	spin_lock(&gman->lock);
		96	out_err_locked:
		97	gman->used_gmr_pages -= bo->num_pages;
		98	spin_unlock(&gman->lock);
		99	return ret;
		100	}
		101
		102	static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man,
		103	struct ttm_mem_reg *mem)
		104	{
		105	struct vmwgfx_gmrid_man *gman =
		106	(struct vmwgfx_gmrid_man *)man->priv;
		107
		108	if (mem->mm_node) {
		109	spin_lock(&gman->lock);
		110	ida_remove(&gman->gmr_ida, mem->start);
		111	gman->used_gmr_pages -= mem->num_pages;
		112	spin_unlock(&gman->lock);
		113	mem->mm_node = NULL;
		114	}
		115	}
		116
		117	static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man,
		118	unsigned long p_size)
		119	{
		120	struct vmw_private *dev_priv =
		121	container_of(man->bdev, struct vmw_private, bdev);
		122	struct vmwgfx_gmrid_man *gman =
		123	kzalloc(sizeof(*gman), GFP_KERNEL);
		124
		125	if (unlikely(gman == NULL))
		126	return -ENOMEM;
		127
		128	spin_lock_init(&gman->lock);
		129	gman->used_gmr_pages = 0;
		130	ida_init(&gman->gmr_ida);
4569	Serge	131
		132	switch (p_size) {
		133	case VMW_PL_GMR:
		134	gman->max_gmr_ids = dev_priv->max_gmr_ids;
		135	gman->max_gmr_pages = dev_priv->max_gmr_pages;
		136	break;
		137	case VMW_PL_MOB:
		138	gman->max_gmr_ids = VMWGFX_NUM_MOB;
		139	gman->max_gmr_pages = dev_priv->max_mob_pages;
		140	break;
		141	default:
		142	BUG();
		143	}
4075	Serge	144	man->priv = (void *) gman;
		145	return 0;
		146	}
		147
		148	static int vmw_gmrid_man_takedown(struct ttm_mem_type_manager *man)
		149	{
		150	struct vmwgfx_gmrid_man *gman =
		151	(struct vmwgfx_gmrid_man *)man->priv;
		152
		153	if (gman) {
		154	ida_destroy(&gman->gmr_ida);
		155	kfree(gman);
		156	}
		157	return 0;
		158	}
		159
		160	static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man,
		161	const char *prefix)
		162	{
		163	printk(KERN_INFO "%s: No debug info available for the GMR "
		164	"id manager.\n", prefix);
		165	}
		166
		167	const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = {
		168	vmw_gmrid_man_init,
		169	vmw_gmrid_man_takedown,
		170	vmw_gmrid_man_get_node,
		171	vmw_gmrid_man_put_node,
		172	vmw_gmrid_man_debug
		173	};

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(root)/drivers/video/drm/vmwgfx/vmwgfx_gmrid_manager.c – Rev 5078