vmw_screen_pools.c revision 5dddeb7776c62b6218add3a236551cde876b1cf0 
1/**********************************************************
2 * Copyright 2009 VMware, Inc.  All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26
27#include "vmw_screen.h"
28
29#include "vmw_buffer.h"
30#include "vmw_fence.h"
31
32#include "pipebuffer/pb_buffer.h"
33#include "pipebuffer/pb_bufmgr.h"
34
35/*
36 * TODO: Have the query pool always ask the fence manager for
37 * SVGA_FENCE_FLAG_QUERY signaled. Unfortunately, pb_fenced doesn't
38 * support that currently, so we'd have to create a separate
39 * pb_fence_ops wrapper that does this implicitly.
40 */
41
42/**
43 * vmw_pools_cleanup - Destroy the buffer pools.
44 *
45 * @vws: pointer to a struct vmw_winsys_screen.
46 */
47void
48vmw_pools_cleanup(struct vmw_winsys_screen *vws)
49{
50   if(vws->pools.gmr_fenced)
51      vws->pools.gmr_fenced->destroy(vws->pools.gmr_fenced);
52   if (vws->pools.query_fenced)
53      vws->pools.query_fenced->destroy(vws->pools.query_fenced);
54
55   /* gmr_mm pool is already destroyed above */
56
57   if (vws->pools.gmr_slab_fenced)
58      vws->pools.gmr_slab_fenced->destroy(vws->pools.gmr_slab_fenced);
59
60   if(vws->pools.gmr)
61      vws->pools.gmr->destroy(vws->pools.gmr);
62   if(vws->pools.query)
63      vws->pools.query->destroy(vws->pools.query);
64}
65
66
67/**
68 * vmw_query_pools_init - Create a pool of query buffers.
69 *
70 * @vws: Pointer to a struct vmw_winsys_screen.
71 *
72 * Typically this pool should be created on demand when we
73 * detect that the app will be using queries. There's nothing
74 * special with this pool other than the backing kernel buffer size,
75 * which is limited to 8192.
76 */
77boolean
78vmw_query_pools_init(struct vmw_winsys_screen *vws)
79{
80   vws->pools.query = vmw_gmr_bufmgr_create(vws);
81   if(!vws->pools.query)
82      return FALSE;
83
84   vws->pools.query_mm = mm_bufmgr_create(vws->pools.query,
85					  VMW_QUERY_POOL_SIZE,
86					  3 /* 8 alignment */);
87   if(!vws->pools.query_mm)
88      goto out_no_query_mm;
89
90   vws->pools.query_fenced = fenced_bufmgr_create(
91      vws->pools.query_mm,
92      vmw_fence_ops_create(vws),
93      VMW_QUERY_POOL_SIZE,
94      ~0);
95
96   if(!vws->pools.query_fenced)
97      goto out_no_query_fenced;
98
99   return TRUE;
100
101  out_no_query_fenced:
102   vws->pools.query_mm->destroy(vws->pools.query_mm);
103  out_no_query_mm:
104   vws->pools.query->destroy(vws->pools.query);
105   return FALSE;
106}
107
108/**
109 * vmw_pools_init - Create a pool of GMR buffers.
110 *
111 * @vws: Pointer to a struct vmw_winsys_screen.
112 */
113boolean
114vmw_pools_init(struct vmw_winsys_screen *vws)
115{
116   struct pb_desc desc;
117
118   vws->pools.gmr = vmw_gmr_bufmgr_create(vws);
119   if(!vws->pools.gmr)
120      goto error;
121
122   vws->pools.gmr_mm = mm_bufmgr_create(vws->pools.gmr,
123                                        VMW_GMR_POOL_SIZE,
124                                        12 /* 4096 alignment */);
125   if(!vws->pools.gmr_mm)
126      goto error;
127
128   /*
129    * We disallow "CPU" buffers to be created by the fenced_bufmgr_create,
130    * because that defers "GPU" buffer creation to buffer validation,
131    * and at buffer validation we have no means of handling failures
132    * due to pools space shortage or fragmentation. Effectively this
133    * makes sure all failures are reported immediately on buffer allocation,
134    * and we can revert to allocating directly from the kernel.
135    */
136   vws->pools.gmr_fenced = fenced_bufmgr_create(
137      vws->pools.gmr_mm,
138      vmw_fence_ops_create(vws),
139      VMW_GMR_POOL_SIZE,
140      0);
141
142#ifdef DEBUG
143   vws->pools.gmr_fenced = pb_debug_manager_create(vws->pools.gmr_fenced,
144						   4096,
145						   4096);
146#endif
147   if(!vws->pools.gmr_fenced)
148      goto error;
149
150   /*
151    * The slab pool allocates buffers directly from the kernel except
152    * for very small buffers which are allocated from a slab in order
153    * not to waste memory, since a kernel buffer is a minimum 4096 bytes.
154    *
155    * Here we use it only for emergency in the case our pre-allocated
156    * buffer pool runs out of memory.
157    */
158   desc.alignment = 64;
159   desc.usage = ~0;
160   vws->pools.gmr_slab = pb_slab_range_manager_create(vws->pools.gmr,
161						      64,
162						      8192,
163						      16384,
164						      &desc);
165   if (!vws->pools.gmr_slab)
166       goto error;
167
168   vws->pools.gmr_slab_fenced =
169       fenced_bufmgr_create(vws->pools.gmr_slab,
170			    vmw_fence_ops_create(vws),
171			    VMW_MAX_BUFFER_SIZE,
172			    0);
173
174   if (!vws->pools.gmr_slab_fenced)
175       goto error;
176
177   vws->pools.query_fenced = NULL;
178   vws->pools.query_mm = NULL;
179   vws->pools.query = NULL;
180
181   return TRUE;
182
183error:
184   vmw_pools_cleanup(vws);
185   return FALSE;
186}
187
188