1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/*
* GRU KERNEL MCS INSTRUCTIONS
*
* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include "gru.h"
#include "grulib.h"
#include "grutables.h"
/* 10 sec */
#ifdef CONFIG_IA64
#include <asm/processor.h>
#define GRU_OPERATION_TIMEOUT (((cycles_t) local_cpu_data->itc_freq)*10)
#else
#include <asm/tsc.h>
#define GRU_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)
#endif
/* Extract the status field from a kernel handle */
#define GET_MSEG_HANDLE_STATUS(h) (((*(unsigned long *)(h)) >> 16) & 3)
struct mcs_op_statistic mcs_op_statistics[mcsop_last];
static void update_mcs_stats(enum mcs_op op, unsigned long clks)
{
atomic_long_inc(&mcs_op_statistics[op].count);
atomic_long_add(clks, &mcs_op_statistics[op].total);
if (mcs_op_statistics[op].max < clks)
mcs_op_statistics[op].max = clks;
}
static void start_instruction(void *h)
{
unsigned long *w0 = h;
wmb(); /* setting CMD bit must be last */
*w0 = *w0 | 1;
gru_flush_cache(h);
}
static int wait_instruction_complete(void *h, enum mcs_op opc)
{
int status;
cycles_t start_time = get_cycles();
while (1) {
cpu_relax();
status = GET_MSEG_HANDLE_STATUS(h);
if (status != CCHSTATUS_ACTIVE)
break;
if (GRU_OPERATION_TIMEOUT < (get_cycles() - start_time))
panic("GRU %p is malfunctioning\n", h);
}
if (gru_options & OPT_STATS)
update_mcs_stats(opc, get_cycles() - start_time);
return status;
}
#if defined CONFIG_IA64
static void cch_allocate_set_asids(
struct gru_context_configuration_handle *cch, int asidval)
{
int i;
for (i = 0; i < 8; i++) {
cch->asid[i] = (asidval++);
#if 0
/* ZZZ hugepages not supported yet */
if (i == RGN_HPAGE)
cch->sizeavail[i] = GRU_SIZEAVAIL(hpage_shift);
else
#endif
cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT);
}
}
#elif defined CONFIG_X86_64
static void cch_allocate_set_asids(
struct gru_context_configuration_handle *cch, int asidval)
{
int i;
for (i = 0; i < 8; i++) {
cch->asid[i] = asidval++;
cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT) |
GRU_SIZEAVAIL(21);
}
}
#endif
int cch_allocate(struct gru_context_configuration_handle *cch,
int asidval, unsigned long cbrmap,
unsigned long dsrmap)
{
cch_allocate_set_asids(cch, asidval);
cch->dsr_allocation_map = dsrmap;
cch->cbr_allocation_map = cbrmap;
cch->opc = CCHOP_ALLOCATE;
start_instruction(cch);
return wait_instruction_complete(cch, cchop_allocate);
}
int cch_start(struct gru_context_configuration_handle *cch)
{
cch->opc = CCHOP_START;
start_instruction(cch);
return wait_instruction_complete(cch, cchop_start);
}
int cch_interrupt(struct gru_context_configuration_handle *cch)
{
cch->opc = CCHOP_INTERRUPT;
start_instruction(cch);
return wait_instruction_complete(cch, cchop_interrupt);
}
int cch_deallocate(struct gru_context_configuration_handle *cch)
{
cch->opc = CCHOP_DEALLOCATE;
start_instruction(cch);
return wait_instruction_complete(cch, cchop_deallocate);
}
int cch_interrupt_sync(struct gru_context_configuration_handle
*cch)
{
cch->opc = CCHOP_INTERRUPT_SYNC;
start_instruction(cch);
return wait_instruction_complete(cch, cchop_interrupt_sync);
}
int tgh_invalidate(struct gru_tlb_global_handle *tgh,
unsigned long vaddr, unsigned long vaddrmask,
int asid, int pagesize, int global, int n,
unsigned short ctxbitmap)
{
tgh->vaddr = vaddr;
tgh->asid = asid;
tgh->pagesize = pagesize;
tgh->n = n;
tgh->global = global;
tgh->vaddrmask = vaddrmask;
tgh->ctxbitmap = ctxbitmap;
tgh->opc = TGHOP_TLBINV;
start_instruction(tgh);
return wait_instruction_complete(tgh, tghop_invalidate);
}
void tfh_write_only(struct gru_tlb_fault_handle *tfh,
unsigned long pfn, unsigned long vaddr,
int asid, int dirty, int pagesize)
{
tfh->fillasid = asid;
tfh->fillvaddr = vaddr;
tfh->pfn = pfn;
tfh->dirty = dirty;
tfh->pagesize = pagesize;
tfh->opc = TFHOP_WRITE_ONLY;
start_instruction(tfh);
}
void tfh_write_restart(struct gru_tlb_fault_handle *tfh,
unsigned long paddr, int gaa,
unsigned long vaddr, int asid, int dirty,
int pagesize)
{
tfh->fillasid = asid;
tfh->fillvaddr = vaddr;
tfh->pfn = paddr >> GRU_PADDR_SHIFT;
tfh->gaa = gaa;
tfh->dirty = dirty;
tfh->pagesize = pagesize;
tfh->opc = TFHOP_WRITE_RESTART;
start_instruction(tfh);
}
void tfh_restart(struct gru_tlb_fault_handle *tfh)
{
tfh->opc = TFHOP_RESTART;
start_instruction(tfh);
}
void tfh_user_polling_mode(struct gru_tlb_fault_handle *tfh)
{
tfh->opc = TFHOP_USER_POLLING_MODE;
start_instruction(tfh);
}
void tfh_exception(struct gru_tlb_fault_handle *tfh)
{
tfh->opc = TFHOP_EXCEPTION;
start_instruction(tfh);
}
|
