gru.h

 1/*
 2 *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
 3 *
 4 *  This program is free software; you can redistribute it and/or modify
 5 *  it under the terms of the GNU Lesser General Public License as published by
 6 *  the Free Software Foundation; either version 2.1 of the License, or
 7 *  (at your option) any later version.
 8 *
 9 *  This program is distributed in the hope that it will be useful,
10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 *  GNU Lesser General Public License for more details.
13 *
14 *  You should have received a copy of the GNU Lesser General Public License
15 *  along with this program; if not, write to the Free Software
16 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
17 */
18
19#ifndef __GRU_H__
20#define __GRU_H__
21
22/*
23 * GRU architectural definitions
24 */
25#define GRU_CACHE_LINE_BYTES		64
26#define GRU_HANDLE_STRIDE		256
27#define GRU_CB_BASE			0
28#define GRU_DS_BASE			0x20000
29
30/*
31 * Size used to map GRU GSeg
32 */
33#if defined(CONFIG_X86_64)
34#define GRU_GSEG_PAGESIZE	(256 * 1024UL)		/* ZZZ 2MB ??? */
35#else
36#error "Unsupported architecture"
37#endif
38
39/*
40 * Structure for obtaining GRU resource information
41 */
42struct gru_chiplet_info {
43	int	node;
44	int	chiplet;
45	int	blade;
46	int	total_dsr_bytes;
47	int	total_cbr;
48	int	total_user_dsr_bytes;
49	int	total_user_cbr;
50	int	free_user_dsr_bytes;
51	int	free_user_cbr;
52};
53
54/*
55 * Statictics kept for each context.
56 */
57struct gru_gseg_statistics {
58	unsigned long	fmm_tlbmiss;
59	unsigned long	upm_tlbmiss;
60	unsigned long	tlbdropin;
61	unsigned long	context_stolen;
62	unsigned long	reserved[10];
63};
64
65/* Flags for GRU options on the gru_create_context() call */
66/* Select one of the follow 4 options to specify how TLB misses are handled */
67#define GRU_OPT_MISS_DEFAULT	0x0000	/* Use default mode */
68#define GRU_OPT_MISS_USER_POLL	0x0001	/* User will poll CB for faults */
69#define GRU_OPT_MISS_FMM_INTR	0x0002	/* Send interrupt to cpu to
70					   handle fault */
71#define GRU_OPT_MISS_FMM_POLL	0x0003	/* Use system polling thread */
72#define GRU_OPT_MISS_MASK	0x0003	/* Mask for TLB MISS option */
73
74
75
76#endif		/* __GRU_H__ */