[linux-2.6-block.git] / drivers / gpu / drm / vmwgfx / vmwgfx_gmrid_manager.c

// 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 <thellstrom-at-vmware-dot-com>
 */

#include "vmwgfx_drv.h"
#include <drm/ttm/ttm_module.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <linux/idr.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>

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;

	mem->mm_node = NULL;

	id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL);
	if (id < 0)
		return 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 0;
}

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;
}

static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man,
				struct drm_printer *printer)
{
	drm_printf(printer, "No debug info available for the GMR id manager\n");
}

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,
	.debug = vmw_gmrid_man_debug
};
Commit	Line	Data
dff96888	1	// SPDX-License-Identifier: GPL-2.0 OR MIT
135cba0d TH	2	/**************************************************************************
135cba0d TH	3	*
dff96888	4	* Copyright 2007-2010 VMware, Inc., Palo Alto, CA., USA
135cba0d TH	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 <thellstrom-at-vmware-dot-com>
	29	*/
	30
	31	#include "vmwgfx_drv.h"
760285e7 DH	32	#include <drm/ttm/ttm_module.h>
	33	#include <drm/ttm/ttm_bo_driver.h>
	34	#include <drm/ttm/ttm_placement.h>
135cba0d TH	35	#include <linux/idr.h>
	36	#include <linux/spinlock.h>
	37	#include <linux/kernel.h>
	38
	39	struct vmwgfx_gmrid_man {
	40	spinlock_t lock;
	41	struct ida gmr_ida;
	42	uint32_t max_gmr_ids;
fb17f189 TH	43	uint32_t max_gmr_pages;
fb17f189 TH	44	uint32_t used_gmr_pages;
135cba0d TH	45	};
	46
	47	static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man,
	48	struct ttm_buffer_object *bo,
f1217ed0	49	const struct ttm_place *place,
135cba0d TH	50	struct ttm_mem_reg *mem)
	51	{
	52	struct vmwgfx_gmrid_man *gman =
	53	(struct vmwgfx_gmrid_man *)man->priv;
135cba0d TH	54	int id;
	55
	56	mem->mm_node = NULL;
	57
4eb085e4 MW	58	id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL);
	59	if (id < 0)
	60	return id;
	61
fb17f189 TH	62	spin_lock(&gman->lock);
	63
	64	if (gman->max_gmr_pages > 0) {
	65	gman->used_gmr_pages += bo->num_pages;
	66	if (unlikely(gman->used_gmr_pages > gman->max_gmr_pages))
4eb085e4	67	goto nospace;
fb17f189	68	}
135cba0d	69
4eb085e4 MW	70	mem->mm_node = gman;
	71	mem->start = id;
	72	mem->num_pages = bo->num_pages;
fb17f189 TH	73
	74	spin_unlock(&gman->lock);
	75	return 0;
135cba0d	76
4eb085e4	77	nospace:
fb17f189 TH	78	gman->used_gmr_pages -= bo->num_pages;
fb17f189 TH	79	spin_unlock(&gman->lock);
4eb085e4 MW	80	ida_free(&gman->gmr_ida, id);
4eb085e4 MW	81	return 0;
135cba0d TH	82	}
	83
	84	static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man,
	85	struct ttm_mem_reg *mem)
	86	{
	87	struct vmwgfx_gmrid_man *gman =
	88	(struct vmwgfx_gmrid_man *)man->priv;
	89
	90	if (mem->mm_node) {
4eb085e4	91	ida_free(&gman->gmr_ida, mem->start);
135cba0d	92	spin_lock(&gman->lock);
fb17f189	93	gman->used_gmr_pages -= mem->num_pages;
135cba0d TH	94	spin_unlock(&gman->lock);
	95	mem->mm_node = NULL;
	96	}
	97	}
	98
	99	static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man,
	100	unsigned long p_size)
	101	{
fb17f189 TH	102	struct vmw_private *dev_priv =
fb17f189 TH	103	container_of(man->bdev, struct vmw_private, bdev);
135cba0d TH	104	struct vmwgfx_gmrid_man *gman =
	105	kzalloc(sizeof(*gman), GFP_KERNEL);
	106
1a4adb05	107	if (unlikely(!gman))
135cba0d TH	108	return -ENOMEM;
	109
	110	spin_lock_init(&gman->lock);
fb17f189	111	gman->used_gmr_pages = 0;
135cba0d	112	ida_init(&gman->gmr_ida);
6da768aa TH	113
	114	switch (p_size) {
	115	case VMW_PL_GMR:
	116	gman->max_gmr_ids = dev_priv->max_gmr_ids;
	117	gman->max_gmr_pages = dev_priv->max_gmr_pages;
	118	break;
	119	case VMW_PL_MOB:
	120	gman->max_gmr_ids = VMWGFX_NUM_MOB;
	121	gman->max_gmr_pages = dev_priv->max_mob_pages;
	122	break;
	123	default:
	124	BUG();
	125	}
135cba0d TH	126	man->priv = (void *) gman;
	127	return 0;
	128	}
	129
	130	static int vmw_gmrid_man_takedown(struct ttm_mem_type_manager *man)
	131	{
	132	struct vmwgfx_gmrid_man *gman =
	133	(struct vmwgfx_gmrid_man *)man->priv;
	134
	135	if (gman) {
	136	ida_destroy(&gman->gmr_ida);
	137	kfree(gman);
	138	}
	139	return 0;
	140	}
	141
	142	static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man,
373533f8	143	struct drm_printer *printer)
135cba0d	144	{
373533f8	145	drm_printf(printer, "No debug info available for the GMR id manager\n");
135cba0d TH	146	}
	147
	148	const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = {
5ca16d8e KC	149	.init = vmw_gmrid_man_init,
	150	.takedown = vmw_gmrid_man_takedown,
	151	.get_node = vmw_gmrid_man_get_node,
	152	.put_node = vmw_gmrid_man_put_node,
	153	.debug = vmw_gmrid_man_debug
135cba0d	154	};