forked from altera-opensource/linux-socfpga
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathrecov_ssse3.c
336 lines (269 loc) · 9.22 KB
/
recov_ssse3.c
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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
/*
* Copyright (C) 2012 Intel Corporation
*
* 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; version 2
* of the License.
*/
#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
#include <linux/raid/pq.h>
#include "x86.h"
static int raid6_has_ssse3(void)
{
return boot_cpu_has(X86_FEATURE_XMM) &&
boot_cpu_has(X86_FEATURE_XMM2) &&
boot_cpu_has(X86_FEATURE_SSSE3);
}
static void raid6_2data_recov_ssse3(int disks, size_t bytes, int faila,
int failb, void **ptrs)
{
u8 *p, *q, *dp, *dq;
const u8 *pbmul; /* P multiplier table for B data */
const u8 *qmul; /* Q multiplier table (for both) */
static const u8 __aligned(16) x0f[16] = {
0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f};
p = (u8 *)ptrs[disks-2];
q = (u8 *)ptrs[disks-1];
/* Compute syndrome with zero for the missing data pages
Use the dead data pages as temporary storage for
delta p and delta q */
dp = (u8 *)ptrs[faila];
ptrs[faila] = (void *)raid6_empty_zero_page;
ptrs[disks-2] = dp;
dq = (u8 *)ptrs[failb];
ptrs[failb] = (void *)raid6_empty_zero_page;
ptrs[disks-1] = dq;
raid6_call.gen_syndrome(disks, bytes, ptrs);
/* Restore pointer table */
ptrs[faila] = dp;
ptrs[failb] = dq;
ptrs[disks-2] = p;
ptrs[disks-1] = q;
/* Now, pick the proper data tables */
pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]];
qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^
raid6_gfexp[failb]]];
kernel_fpu_begin();
asm volatile("movdqa %0,%%xmm7" : : "m" (x0f[0]));
#ifdef CONFIG_X86_64
asm volatile("movdqa %0,%%xmm6" : : "m" (qmul[0]));
asm volatile("movdqa %0,%%xmm14" : : "m" (pbmul[0]));
asm volatile("movdqa %0,%%xmm15" : : "m" (pbmul[16]));
#endif
/* Now do it... */
while (bytes) {
#ifdef CONFIG_X86_64
/* xmm6, xmm14, xmm15 */
asm volatile("movdqa %0,%%xmm1" : : "m" (q[0]));
asm volatile("movdqa %0,%%xmm9" : : "m" (q[16]));
asm volatile("movdqa %0,%%xmm0" : : "m" (p[0]));
asm volatile("movdqa %0,%%xmm8" : : "m" (p[16]));
asm volatile("pxor %0,%%xmm1" : : "m" (dq[0]));
asm volatile("pxor %0,%%xmm9" : : "m" (dq[16]));
asm volatile("pxor %0,%%xmm0" : : "m" (dp[0]));
asm volatile("pxor %0,%%xmm8" : : "m" (dp[16]));
/* xmm0/8 = px */
asm volatile("movdqa %xmm6,%xmm4");
asm volatile("movdqa %0,%%xmm5" : : "m" (qmul[16]));
asm volatile("movdqa %xmm6,%xmm12");
asm volatile("movdqa %xmm5,%xmm13");
asm volatile("movdqa %xmm1,%xmm3");
asm volatile("movdqa %xmm9,%xmm11");
asm volatile("movdqa %xmm0,%xmm2"); /* xmm2/10 = px */
asm volatile("movdqa %xmm8,%xmm10");
asm volatile("psraw $4,%xmm1");
asm volatile("psraw $4,%xmm9");
asm volatile("pand %xmm7,%xmm3");
asm volatile("pand %xmm7,%xmm11");
asm volatile("pand %xmm7,%xmm1");
asm volatile("pand %xmm7,%xmm9");
asm volatile("pshufb %xmm3,%xmm4");
asm volatile("pshufb %xmm11,%xmm12");
asm volatile("pshufb %xmm1,%xmm5");
asm volatile("pshufb %xmm9,%xmm13");
asm volatile("pxor %xmm4,%xmm5");
asm volatile("pxor %xmm12,%xmm13");
/* xmm5/13 = qx */
asm volatile("movdqa %xmm14,%xmm4");
asm volatile("movdqa %xmm15,%xmm1");
asm volatile("movdqa %xmm14,%xmm12");
asm volatile("movdqa %xmm15,%xmm9");
asm volatile("movdqa %xmm2,%xmm3");
asm volatile("movdqa %xmm10,%xmm11");
asm volatile("psraw $4,%xmm2");
asm volatile("psraw $4,%xmm10");
asm volatile("pand %xmm7,%xmm3");
asm volatile("pand %xmm7,%xmm11");
asm volatile("pand %xmm7,%xmm2");
asm volatile("pand %xmm7,%xmm10");
asm volatile("pshufb %xmm3,%xmm4");
asm volatile("pshufb %xmm11,%xmm12");
asm volatile("pshufb %xmm2,%xmm1");
asm volatile("pshufb %xmm10,%xmm9");
asm volatile("pxor %xmm4,%xmm1");
asm volatile("pxor %xmm12,%xmm9");
/* xmm1/9 = pbmul[px] */
asm volatile("pxor %xmm5,%xmm1");
asm volatile("pxor %xmm13,%xmm9");
/* xmm1/9 = db = DQ */
asm volatile("movdqa %%xmm1,%0" : "=m" (dq[0]));
asm volatile("movdqa %%xmm9,%0" : "=m" (dq[16]));
asm volatile("pxor %xmm1,%xmm0");
asm volatile("pxor %xmm9,%xmm8");
asm volatile("movdqa %%xmm0,%0" : "=m" (dp[0]));
asm volatile("movdqa %%xmm8,%0" : "=m" (dp[16]));
bytes -= 32;
p += 32;
q += 32;
dp += 32;
dq += 32;
#else
asm volatile("movdqa %0,%%xmm1" : : "m" (*q));
asm volatile("movdqa %0,%%xmm0" : : "m" (*p));
asm volatile("pxor %0,%%xmm1" : : "m" (*dq));
asm volatile("pxor %0,%%xmm0" : : "m" (*dp));
/* 1 = dq ^ q
* 0 = dp ^ p
*/
asm volatile("movdqa %0,%%xmm4" : : "m" (qmul[0]));
asm volatile("movdqa %0,%%xmm5" : : "m" (qmul[16]));
asm volatile("movdqa %xmm1,%xmm3");
asm volatile("psraw $4,%xmm1");
asm volatile("pand %xmm7,%xmm3");
asm volatile("pand %xmm7,%xmm1");
asm volatile("pshufb %xmm3,%xmm4");
asm volatile("pshufb %xmm1,%xmm5");
asm volatile("pxor %xmm4,%xmm5");
asm volatile("movdqa %xmm0,%xmm2"); /* xmm2 = px */
/* xmm5 = qx */
asm volatile("movdqa %0,%%xmm4" : : "m" (pbmul[0]));
asm volatile("movdqa %0,%%xmm1" : : "m" (pbmul[16]));
asm volatile("movdqa %xmm2,%xmm3");
asm volatile("psraw $4,%xmm2");
asm volatile("pand %xmm7,%xmm3");
asm volatile("pand %xmm7,%xmm2");
asm volatile("pshufb %xmm3,%xmm4");
asm volatile("pshufb %xmm2,%xmm1");
asm volatile("pxor %xmm4,%xmm1");
/* xmm1 = pbmul[px] */
asm volatile("pxor %xmm5,%xmm1");
/* xmm1 = db = DQ */
asm volatile("movdqa %%xmm1,%0" : "=m" (*dq));
asm volatile("pxor %xmm1,%xmm0");
asm volatile("movdqa %%xmm0,%0" : "=m" (*dp));
bytes -= 16;
p += 16;
q += 16;
dp += 16;
dq += 16;
#endif
}
kernel_fpu_end();
}
static void raid6_datap_recov_ssse3(int disks, size_t bytes, int faila,
void **ptrs)
{
u8 *p, *q, *dq;
const u8 *qmul; /* Q multiplier table */
static const u8 __aligned(16) x0f[16] = {
0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f};
p = (u8 *)ptrs[disks-2];
q = (u8 *)ptrs[disks-1];
/* Compute syndrome with zero for the missing data page
Use the dead data page as temporary storage for delta q */
dq = (u8 *)ptrs[faila];
ptrs[faila] = (void *)raid6_empty_zero_page;
ptrs[disks-1] = dq;
raid6_call.gen_syndrome(disks, bytes, ptrs);
/* Restore pointer table */
ptrs[faila] = dq;
ptrs[disks-1] = q;
/* Now, pick the proper data tables */
qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]];
kernel_fpu_begin();
asm volatile("movdqa %0, %%xmm7" : : "m" (x0f[0]));
while (bytes) {
#ifdef CONFIG_X86_64
asm volatile("movdqa %0, %%xmm3" : : "m" (dq[0]));
asm volatile("movdqa %0, %%xmm4" : : "m" (dq[16]));
asm volatile("pxor %0, %%xmm3" : : "m" (q[0]));
asm volatile("movdqa %0, %%xmm0" : : "m" (qmul[0]));
/* xmm3 = q[0] ^ dq[0] */
asm volatile("pxor %0, %%xmm4" : : "m" (q[16]));
asm volatile("movdqa %0, %%xmm1" : : "m" (qmul[16]));
/* xmm4 = q[16] ^ dq[16] */
asm volatile("movdqa %xmm3, %xmm6");
asm volatile("movdqa %xmm4, %xmm8");
/* xmm4 = xmm8 = q[16] ^ dq[16] */
asm volatile("psraw $4, %xmm3");
asm volatile("pand %xmm7, %xmm6");
asm volatile("pand %xmm7, %xmm3");
asm volatile("pshufb %xmm6, %xmm0");
asm volatile("pshufb %xmm3, %xmm1");
asm volatile("movdqa %0, %%xmm10" : : "m" (qmul[0]));
asm volatile("pxor %xmm0, %xmm1");
asm volatile("movdqa %0, %%xmm11" : : "m" (qmul[16]));
/* xmm1 = qmul[q[0] ^ dq[0]] */
asm volatile("psraw $4, %xmm4");
asm volatile("pand %xmm7, %xmm8");
asm volatile("pand %xmm7, %xmm4");
asm volatile("pshufb %xmm8, %xmm10");
asm volatile("pshufb %xmm4, %xmm11");
asm volatile("movdqa %0, %%xmm2" : : "m" (p[0]));
asm volatile("pxor %xmm10, %xmm11");
asm volatile("movdqa %0, %%xmm12" : : "m" (p[16]));
/* xmm11 = qmul[q[16] ^ dq[16]] */
asm volatile("pxor %xmm1, %xmm2");
/* xmm2 = p[0] ^ qmul[q[0] ^ dq[0]] */
asm volatile("pxor %xmm11, %xmm12");
/* xmm12 = p[16] ^ qmul[q[16] ^ dq[16]] */
asm volatile("movdqa %%xmm1, %0" : "=m" (dq[0]));
asm volatile("movdqa %%xmm11, %0" : "=m" (dq[16]));
asm volatile("movdqa %%xmm2, %0" : "=m" (p[0]));
asm volatile("movdqa %%xmm12, %0" : "=m" (p[16]));
bytes -= 32;
p += 32;
q += 32;
dq += 32;
#else
asm volatile("movdqa %0, %%xmm3" : : "m" (dq[0]));
asm volatile("movdqa %0, %%xmm0" : : "m" (qmul[0]));
asm volatile("pxor %0, %%xmm3" : : "m" (q[0]));
asm volatile("movdqa %0, %%xmm1" : : "m" (qmul[16]));
/* xmm3 = *q ^ *dq */
asm volatile("movdqa %xmm3, %xmm6");
asm volatile("movdqa %0, %%xmm2" : : "m" (p[0]));
asm volatile("psraw $4, %xmm3");
asm volatile("pand %xmm7, %xmm6");
asm volatile("pand %xmm7, %xmm3");
asm volatile("pshufb %xmm6, %xmm0");
asm volatile("pshufb %xmm3, %xmm1");
asm volatile("pxor %xmm0, %xmm1");
/* xmm1 = qmul[*q ^ *dq */
asm volatile("pxor %xmm1, %xmm2");
/* xmm2 = *p ^ qmul[*q ^ *dq] */
asm volatile("movdqa %%xmm1, %0" : "=m" (dq[0]));
asm volatile("movdqa %%xmm2, %0" : "=m" (p[0]));
bytes -= 16;
p += 16;
q += 16;
dq += 16;
#endif
}
kernel_fpu_end();
}
const struct raid6_recov_calls raid6_recov_ssse3 = {
.data2 = raid6_2data_recov_ssse3,
.datap = raid6_datap_recov_ssse3,
.valid = raid6_has_ssse3,
#ifdef CONFIG_X86_64
.name = "ssse3x2",
#else
.name = "ssse3x1",
#endif
.priority = 1,
};
#endif