2 * Copyright (C) 2012 Intel Corporation
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; version 2
10 #include <linux/raid/pq.h>
13 static int raid6_has_ssse3(void)
15 return boot_cpu_has(X86_FEATURE_XMM) &&
16 boot_cpu_has(X86_FEATURE_XMM2) &&
17 boot_cpu_has(X86_FEATURE_SSSE3);
20 static void raid6_2data_recov_ssse3(int disks, size_t bytes, int faila,
21 int failb, void **ptrs)
24 const u8 *pbmul; /* P multiplier table for B data */
25 const u8 *qmul; /* Q multiplier table (for both) */
26 static const u8 __aligned(16) x0f[16] = {
27 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
28 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f};
30 p = (u8 *)ptrs[disks-2];
31 q = (u8 *)ptrs[disks-1];
33 /* Compute syndrome with zero for the missing data pages
34 Use the dead data pages as temporary storage for
35 delta p and delta q */
36 dp = (u8 *)ptrs[faila];
37 ptrs[faila] = (void *)raid6_empty_zero_page;
39 dq = (u8 *)ptrs[failb];
40 ptrs[failb] = (void *)raid6_empty_zero_page;
43 raid6_call.gen_syndrome(disks, bytes, ptrs);
45 /* Restore pointer table */
51 /* Now, pick the proper data tables */
52 pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]];
53 qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^
58 asm volatile("movdqa %0,%%xmm7" : : "m" (x0f[0]));
61 asm volatile("movdqa %0,%%xmm6" : : "m" (qmul[0]));
62 asm volatile("movdqa %0,%%xmm14" : : "m" (pbmul[0]));
63 asm volatile("movdqa %0,%%xmm15" : : "m" (pbmul[16]));
69 /* xmm6, xmm14, xmm15 */
71 asm volatile("movdqa %0,%%xmm1" : : "m" (q[0]));
72 asm volatile("movdqa %0,%%xmm9" : : "m" (q[16]));
73 asm volatile("movdqa %0,%%xmm0" : : "m" (p[0]));
74 asm volatile("movdqa %0,%%xmm8" : : "m" (p[16]));
75 asm volatile("pxor %0,%%xmm1" : : "m" (dq[0]));
76 asm volatile("pxor %0,%%xmm9" : : "m" (dq[16]));
77 asm volatile("pxor %0,%%xmm0" : : "m" (dp[0]));
78 asm volatile("pxor %0,%%xmm8" : : "m" (dp[16]));
82 asm volatile("movdqa %xmm6,%xmm4");
83 asm volatile("movdqa %0,%%xmm5" : : "m" (qmul[16]));
84 asm volatile("movdqa %xmm6,%xmm12");
85 asm volatile("movdqa %xmm5,%xmm13");
86 asm volatile("movdqa %xmm1,%xmm3");
87 asm volatile("movdqa %xmm9,%xmm11");
88 asm volatile("movdqa %xmm0,%xmm2"); /* xmm2/10 = px */
89 asm volatile("movdqa %xmm8,%xmm10");
90 asm volatile("psraw $4,%xmm1");
91 asm volatile("psraw $4,%xmm9");
92 asm volatile("pand %xmm7,%xmm3");
93 asm volatile("pand %xmm7,%xmm11");
94 asm volatile("pand %xmm7,%xmm1");
95 asm volatile("pand %xmm7,%xmm9");
96 asm volatile("pshufb %xmm3,%xmm4");
97 asm volatile("pshufb %xmm11,%xmm12");
98 asm volatile("pshufb %xmm1,%xmm5");
99 asm volatile("pshufb %xmm9,%xmm13");
100 asm volatile("pxor %xmm4,%xmm5");
101 asm volatile("pxor %xmm12,%xmm13");
105 asm volatile("movdqa %xmm14,%xmm4");
106 asm volatile("movdqa %xmm15,%xmm1");
107 asm volatile("movdqa %xmm14,%xmm12");
108 asm volatile("movdqa %xmm15,%xmm9");
109 asm volatile("movdqa %xmm2,%xmm3");
110 asm volatile("movdqa %xmm10,%xmm11");
111 asm volatile("psraw $4,%xmm2");
112 asm volatile("psraw $4,%xmm10");
113 asm volatile("pand %xmm7,%xmm3");
114 asm volatile("pand %xmm7,%xmm11");
115 asm volatile("pand %xmm7,%xmm2");
116 asm volatile("pand %xmm7,%xmm10");
117 asm volatile("pshufb %xmm3,%xmm4");
118 asm volatile("pshufb %xmm11,%xmm12");
119 asm volatile("pshufb %xmm2,%xmm1");
120 asm volatile("pshufb %xmm10,%xmm9");
121 asm volatile("pxor %xmm4,%xmm1");
122 asm volatile("pxor %xmm12,%xmm9");
124 /* xmm1/9 = pbmul[px] */
125 asm volatile("pxor %xmm5,%xmm1");
126 asm volatile("pxor %xmm13,%xmm9");
127 /* xmm1/9 = db = DQ */
128 asm volatile("movdqa %%xmm1,%0" : "=m" (dq[0]));
129 asm volatile("movdqa %%xmm9,%0" : "=m" (dq[16]));
131 asm volatile("pxor %xmm1,%xmm0");
132 asm volatile("pxor %xmm9,%xmm8");
133 asm volatile("movdqa %%xmm0,%0" : "=m" (dp[0]));
134 asm volatile("movdqa %%xmm8,%0" : "=m" (dp[16]));
142 asm volatile("movdqa %0,%%xmm1" : : "m" (*q));
143 asm volatile("movdqa %0,%%xmm0" : : "m" (*p));
144 asm volatile("pxor %0,%%xmm1" : : "m" (*dq));
145 asm volatile("pxor %0,%%xmm0" : : "m" (*dp));
150 asm volatile("movdqa %0,%%xmm4" : : "m" (qmul[0]));
151 asm volatile("movdqa %0,%%xmm5" : : "m" (qmul[16]));
153 asm volatile("movdqa %xmm1,%xmm3");
154 asm volatile("psraw $4,%xmm1");
155 asm volatile("pand %xmm7,%xmm3");
156 asm volatile("pand %xmm7,%xmm1");
157 asm volatile("pshufb %xmm3,%xmm4");
158 asm volatile("pshufb %xmm1,%xmm5");
159 asm volatile("pxor %xmm4,%xmm5");
161 asm volatile("movdqa %xmm0,%xmm2"); /* xmm2 = px */
165 asm volatile("movdqa %0,%%xmm4" : : "m" (pbmul[0]));
166 asm volatile("movdqa %0,%%xmm1" : : "m" (pbmul[16]));
167 asm volatile("movdqa %xmm2,%xmm3");
168 asm volatile("psraw $4,%xmm2");
169 asm volatile("pand %xmm7,%xmm3");
170 asm volatile("pand %xmm7,%xmm2");
171 asm volatile("pshufb %xmm3,%xmm4");
172 asm volatile("pshufb %xmm2,%xmm1");
173 asm volatile("pxor %xmm4,%xmm1");
175 /* xmm1 = pbmul[px] */
176 asm volatile("pxor %xmm5,%xmm1");
178 asm volatile("movdqa %%xmm1,%0" : "=m" (*dq));
180 asm volatile("pxor %xmm1,%xmm0");
181 asm volatile("movdqa %%xmm0,%0" : "=m" (*dp));
195 static void raid6_datap_recov_ssse3(int disks, size_t bytes, int faila,
199 const u8 *qmul; /* Q multiplier table */
200 static const u8 __aligned(16) x0f[16] = {
201 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
202 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f};
204 p = (u8 *)ptrs[disks-2];
205 q = (u8 *)ptrs[disks-1];
207 /* Compute syndrome with zero for the missing data page
208 Use the dead data page as temporary storage for delta q */
209 dq = (u8 *)ptrs[faila];
210 ptrs[faila] = (void *)raid6_empty_zero_page;
213 raid6_call.gen_syndrome(disks, bytes, ptrs);
215 /* Restore pointer table */
219 /* Now, pick the proper data tables */
220 qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]];
224 asm volatile("movdqa %0, %%xmm7" : : "m" (x0f[0]));
228 asm volatile("movdqa %0, %%xmm3" : : "m" (dq[0]));
229 asm volatile("movdqa %0, %%xmm4" : : "m" (dq[16]));
230 asm volatile("pxor %0, %%xmm3" : : "m" (q[0]));
231 asm volatile("movdqa %0, %%xmm0" : : "m" (qmul[0]));
233 /* xmm3 = q[0] ^ dq[0] */
235 asm volatile("pxor %0, %%xmm4" : : "m" (q[16]));
236 asm volatile("movdqa %0, %%xmm1" : : "m" (qmul[16]));
238 /* xmm4 = q[16] ^ dq[16] */
240 asm volatile("movdqa %xmm3, %xmm6");
241 asm volatile("movdqa %xmm4, %xmm8");
243 /* xmm4 = xmm8 = q[16] ^ dq[16] */
245 asm volatile("psraw $4, %xmm3");
246 asm volatile("pand %xmm7, %xmm6");
247 asm volatile("pand %xmm7, %xmm3");
248 asm volatile("pshufb %xmm6, %xmm0");
249 asm volatile("pshufb %xmm3, %xmm1");
250 asm volatile("movdqa %0, %%xmm10" : : "m" (qmul[0]));
251 asm volatile("pxor %xmm0, %xmm1");
252 asm volatile("movdqa %0, %%xmm11" : : "m" (qmul[16]));
254 /* xmm1 = qmul[q[0] ^ dq[0]] */
256 asm volatile("psraw $4, %xmm4");
257 asm volatile("pand %xmm7, %xmm8");
258 asm volatile("pand %xmm7, %xmm4");
259 asm volatile("pshufb %xmm8, %xmm10");
260 asm volatile("pshufb %xmm4, %xmm11");
261 asm volatile("movdqa %0, %%xmm2" : : "m" (p[0]));
262 asm volatile("pxor %xmm10, %xmm11");
263 asm volatile("movdqa %0, %%xmm12" : : "m" (p[16]));
265 /* xmm11 = qmul[q[16] ^ dq[16]] */
267 asm volatile("pxor %xmm1, %xmm2");
269 /* xmm2 = p[0] ^ qmul[q[0] ^ dq[0]] */
271 asm volatile("pxor %xmm11, %xmm12");
273 /* xmm12 = p[16] ^ qmul[q[16] ^ dq[16]] */
275 asm volatile("movdqa %%xmm1, %0" : "=m" (dq[0]));
276 asm volatile("movdqa %%xmm11, %0" : "=m" (dq[16]));
278 asm volatile("movdqa %%xmm2, %0" : "=m" (p[0]));
279 asm volatile("movdqa %%xmm12, %0" : "=m" (p[16]));
287 asm volatile("movdqa %0, %%xmm3" : : "m" (dq[0]));
288 asm volatile("movdqa %0, %%xmm0" : : "m" (qmul[0]));
289 asm volatile("pxor %0, %%xmm3" : : "m" (q[0]));
290 asm volatile("movdqa %0, %%xmm1" : : "m" (qmul[16]));
292 /* xmm3 = *q ^ *dq */
294 asm volatile("movdqa %xmm3, %xmm6");
295 asm volatile("movdqa %0, %%xmm2" : : "m" (p[0]));
296 asm volatile("psraw $4, %xmm3");
297 asm volatile("pand %xmm7, %xmm6");
298 asm volatile("pand %xmm7, %xmm3");
299 asm volatile("pshufb %xmm6, %xmm0");
300 asm volatile("pshufb %xmm3, %xmm1");
301 asm volatile("pxor %xmm0, %xmm1");
303 /* xmm1 = qmul[*q ^ *dq */
305 asm volatile("pxor %xmm1, %xmm2");
307 /* xmm2 = *p ^ qmul[*q ^ *dq] */
309 asm volatile("movdqa %%xmm1, %0" : "=m" (dq[0]));
310 asm volatile("movdqa %%xmm2, %0" : "=m" (p[0]));
322 const struct raid6_recov_calls raid6_recov_ssse3 = {
323 .data2 = raid6_2data_recov_ssse3,
324 .datap = raid6_datap_recov_ssse3,
325 .valid = raid6_has_ssse3,