xref: /linux/drivers/misc/sgi-gru/gru.h (revision 827634added7f38b7d724cab1dccdb2b004c13c3)
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_IA64)
34 #define GRU_GSEG_PAGESIZE	(256 * 1024UL)
35 #elif defined(CONFIG_X86_64)
36 #define GRU_GSEG_PAGESIZE	(256 * 1024UL)		/* ZZZ 2MB ??? */
37 #else
38 #error "Unsupported architecture"
39 #endif
40 
41 /*
42  * Structure for obtaining GRU resource information
43  */
44 struct gru_chiplet_info {
45 	int	node;
46 	int	chiplet;
47 	int	blade;
48 	int	total_dsr_bytes;
49 	int	total_cbr;
50 	int	total_user_dsr_bytes;
51 	int	total_user_cbr;
52 	int	free_user_dsr_bytes;
53 	int	free_user_cbr;
54 };
55 
56 /*
57  * Statictics kept for each context.
58  */
59 struct gru_gseg_statistics {
60 	unsigned long	fmm_tlbmiss;
61 	unsigned long	upm_tlbmiss;
62 	unsigned long	tlbdropin;
63 	unsigned long	context_stolen;
64 	unsigned long	reserved[10];
65 };
66 
67 /* Flags for GRU options on the gru_create_context() call */
68 /* Select one of the follow 4 options to specify how TLB misses are handled */
69 #define GRU_OPT_MISS_DEFAULT	0x0000	/* Use default mode */
70 #define GRU_OPT_MISS_USER_POLL	0x0001	/* User will poll CB for faults */
71 #define GRU_OPT_MISS_FMM_INTR	0x0002	/* Send interrupt to cpu to
72 					   handle fault */
73 #define GRU_OPT_MISS_FMM_POLL	0x0003	/* Use system polling thread */
74 #define GRU_OPT_MISS_MASK	0x0003	/* Mask for TLB MISS option */
75 
76 
77 
78 #endif		/* __GRU_H__ */
79