blob: 170b61be1e4ece3069a9f9c20e7c90d1f9558ae9 [file] [log] [blame]
Thomas Hellstrom135cba02010-10-26 21:21:47 +02001/**************************************************************************
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 <thellstrom-at-vmware-dot-com>
29 */
30
31#include "vmwgfx_drv.h"
David Howells760285e2012-10-02 18:01:07 +010032#include <drm/ttm/ttm_module.h>
33#include <drm/ttm/ttm_bo_driver.h>
34#include <drm/ttm/ttm_placement.h>
Thomas Hellstrom135cba02010-10-26 21:21:47 +020035#include <linux/idr.h>
36#include <linux/spinlock.h>
37#include <linux/kernel.h>
38
39struct vmwgfx_gmrid_man {
40 spinlock_t lock;
41 struct ida gmr_ida;
42 uint32_t max_gmr_ids;
Thomas Hellstromfb17f182011-08-31 07:42:53 +000043 uint32_t max_gmr_pages;
44 uint32_t used_gmr_pages;
Thomas Hellstrom135cba02010-10-26 21:21:47 +020045};
46
47static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man,
48 struct ttm_buffer_object *bo,
Christian Königf1217ed2014-08-27 13:16:04 +020049 const struct ttm_place *place,
Thomas Hellstrom135cba02010-10-26 21:21:47 +020050 struct ttm_mem_reg *mem)
51{
52 struct vmwgfx_gmrid_man *gman =
53 (struct vmwgfx_gmrid_man *)man->priv;
Thomas Hellstromfb17f182011-08-31 07:42:53 +000054 int ret = 0;
Thomas Hellstrom135cba02010-10-26 21:21:47 +020055 int id;
56
57 mem->mm_node = NULL;
58
Thomas Hellstromfb17f182011-08-31 07:42:53 +000059 spin_lock(&gman->lock);
60
61 if (gman->max_gmr_pages > 0) {
62 gman->used_gmr_pages += bo->num_pages;
63 if (unlikely(gman->used_gmr_pages > gman->max_gmr_pages))
64 goto out_err_locked;
65 }
66
Thomas Hellstrom135cba02010-10-26 21:21:47 +020067 do {
Thomas Hellstromfb17f182011-08-31 07:42:53 +000068 spin_unlock(&gman->lock);
69 if (unlikely(ida_pre_get(&gman->gmr_ida, GFP_KERNEL) == 0)) {
70 ret = -ENOMEM;
71 goto out_err;
72 }
Thomas Hellstrom135cba02010-10-26 21:21:47 +020073 spin_lock(&gman->lock);
Thomas Hellstrom135cba02010-10-26 21:21:47 +020074
Thomas Hellstromfb17f182011-08-31 07:42:53 +000075 ret = ida_get_new(&gman->gmr_ida, &id);
Thomas Hellstrom135cba02010-10-26 21:21:47 +020076 if (unlikely(ret == 0 && id >= gman->max_gmr_ids)) {
77 ida_remove(&gman->gmr_ida, id);
Thomas Hellstromfb17f182011-08-31 07:42:53 +000078 ret = 0;
79 goto out_err_locked;
Thomas Hellstrom135cba02010-10-26 21:21:47 +020080 }
Thomas Hellstrom135cba02010-10-26 21:21:47 +020081 } while (ret == -EAGAIN);
82
83 if (likely(ret == 0)) {
84 mem->mm_node = gman;
85 mem->start = id;
Thomas Hellstromfb17f182011-08-31 07:42:53 +000086 mem->num_pages = bo->num_pages;
87 } else
88 goto out_err_locked;
Thomas Hellstrom135cba02010-10-26 21:21:47 +020089
Thomas Hellstromfb17f182011-08-31 07:42:53 +000090 spin_unlock(&gman->lock);
91 return 0;
92
93out_err:
94 spin_lock(&gman->lock);
95out_err_locked:
96 gman->used_gmr_pages -= bo->num_pages;
97 spin_unlock(&gman->lock);
Thomas Hellstrom135cba02010-10-26 21:21:47 +020098 return ret;
99}
100
101static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man,
102 struct ttm_mem_reg *mem)
103{
104 struct vmwgfx_gmrid_man *gman =
105 (struct vmwgfx_gmrid_man *)man->priv;
106
107 if (mem->mm_node) {
108 spin_lock(&gman->lock);
109 ida_remove(&gman->gmr_ida, mem->start);
Thomas Hellstromfb17f182011-08-31 07:42:53 +0000110 gman->used_gmr_pages -= mem->num_pages;
Thomas Hellstrom135cba02010-10-26 21:21:47 +0200111 spin_unlock(&gman->lock);
112 mem->mm_node = NULL;
113 }
114}
115
116static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man,
117 unsigned long p_size)
118{
Thomas Hellstromfb17f182011-08-31 07:42:53 +0000119 struct vmw_private *dev_priv =
120 container_of(man->bdev, struct vmw_private, bdev);
Thomas Hellstrom135cba02010-10-26 21:21:47 +0200121 struct vmwgfx_gmrid_man *gman =
122 kzalloc(sizeof(*gman), GFP_KERNEL);
123
124 if (unlikely(gman == NULL))
125 return -ENOMEM;
126
127 spin_lock_init(&gman->lock);
Thomas Hellstromfb17f182011-08-31 07:42:53 +0000128 gman->used_gmr_pages = 0;
Thomas Hellstrom135cba02010-10-26 21:21:47 +0200129 ida_init(&gman->gmr_ida);
Thomas Hellstrom6da768a2012-11-21 11:06:22 +0100130
131 switch (p_size) {
132 case VMW_PL_GMR:
133 gman->max_gmr_ids = dev_priv->max_gmr_ids;
134 gman->max_gmr_pages = dev_priv->max_gmr_pages;
135 break;
136 case VMW_PL_MOB:
137 gman->max_gmr_ids = VMWGFX_NUM_MOB;
138 gman->max_gmr_pages = dev_priv->max_mob_pages;
139 break;
140 default:
141 BUG();
142 }
Thomas Hellstrom135cba02010-10-26 21:21:47 +0200143 man->priv = (void *) gman;
144 return 0;
145}
146
147static int vmw_gmrid_man_takedown(struct ttm_mem_type_manager *man)
148{
149 struct vmwgfx_gmrid_man *gman =
150 (struct vmwgfx_gmrid_man *)man->priv;
151
152 if (gman) {
153 ida_destroy(&gman->gmr_ida);
154 kfree(gman);
155 }
156 return 0;
157}
158
159static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man,
160 const char *prefix)
161{
162 printk(KERN_INFO "%s: No debug info available for the GMR "
163 "id manager.\n", prefix);
164}
165
166const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = {
167 vmw_gmrid_man_init,
168 vmw_gmrid_man_takedown,
169 vmw_gmrid_man_get_node,
170 vmw_gmrid_man_put_node,
171 vmw_gmrid_man_debug
172};