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b886d83c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
7056741f JK |
2 | /* |
3 | * Copyright (C) 2012 Intel Corporation | |
4 | * Author: Jim Kukunas <james.t.kukunas@linux.intel.com> | |
7056741f JK |
5 | */ |
6 | ||
75aaf4c3 | 7 | #ifdef CONFIG_AS_AVX2 |
7056741f JK |
8 | |
9 | #include <linux/raid/pq.h> | |
10 | #include "x86.h" | |
11 | ||
12 | static int raid6_has_avx2(void) | |
13 | { | |
14 | return boot_cpu_has(X86_FEATURE_AVX2) && | |
15 | boot_cpu_has(X86_FEATURE_AVX); | |
16 | } | |
17 | ||
18 | static void raid6_2data_recov_avx2(int disks, size_t bytes, int faila, | |
19 | int failb, void **ptrs) | |
20 | { | |
21 | u8 *p, *q, *dp, *dq; | |
22 | const u8 *pbmul; /* P multiplier table for B data */ | |
23 | const u8 *qmul; /* Q multiplier table (for both) */ | |
24 | const u8 x0f = 0x0f; | |
25 | ||
26 | p = (u8 *)ptrs[disks-2]; | |
27 | q = (u8 *)ptrs[disks-1]; | |
28 | ||
29 | /* Compute syndrome with zero for the missing data pages | |
30 | Use the dead data pages as temporary storage for | |
31 | delta p and delta q */ | |
32 | dp = (u8 *)ptrs[faila]; | |
33 | ptrs[faila] = (void *)raid6_empty_zero_page; | |
34 | ptrs[disks-2] = dp; | |
35 | dq = (u8 *)ptrs[failb]; | |
36 | ptrs[failb] = (void *)raid6_empty_zero_page; | |
37 | ptrs[disks-1] = dq; | |
38 | ||
39 | raid6_call.gen_syndrome(disks, bytes, ptrs); | |
40 | ||
41 | /* Restore pointer table */ | |
42 | ptrs[faila] = dp; | |
43 | ptrs[failb] = dq; | |
44 | ptrs[disks-2] = p; | |
45 | ptrs[disks-1] = q; | |
46 | ||
47 | /* Now, pick the proper data tables */ | |
48 | pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]]; | |
49 | qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^ | |
50 | raid6_gfexp[failb]]]; | |
51 | ||
52 | kernel_fpu_begin(); | |
53 | ||
54 | /* ymm0 = x0f[16] */ | |
55 | asm volatile("vpbroadcastb %0, %%ymm7" : : "m" (x0f)); | |
56 | ||
57 | while (bytes) { | |
58 | #ifdef CONFIG_X86_64 | |
59 | asm volatile("vmovdqa %0, %%ymm1" : : "m" (q[0])); | |
60 | asm volatile("vmovdqa %0, %%ymm9" : : "m" (q[32])); | |
61 | asm volatile("vmovdqa %0, %%ymm0" : : "m" (p[0])); | |
62 | asm volatile("vmovdqa %0, %%ymm8" : : "m" (p[32])); | |
63 | asm volatile("vpxor %0, %%ymm1, %%ymm1" : : "m" (dq[0])); | |
64 | asm volatile("vpxor %0, %%ymm9, %%ymm9" : : "m" (dq[32])); | |
65 | asm volatile("vpxor %0, %%ymm0, %%ymm0" : : "m" (dp[0])); | |
66 | asm volatile("vpxor %0, %%ymm8, %%ymm8" : : "m" (dp[32])); | |
67 | ||
68 | /* | |
69 | * 1 = dq[0] ^ q[0] | |
70 | * 9 = dq[32] ^ q[32] | |
71 | * 0 = dp[0] ^ p[0] | |
72 | * 8 = dp[32] ^ p[32] | |
73 | */ | |
74 | ||
75 | asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (qmul[0])); | |
76 | asm volatile("vbroadcasti128 %0, %%ymm5" : : "m" (qmul[16])); | |
77 | ||
78 | asm volatile("vpsraw $4, %ymm1, %ymm3"); | |
79 | asm volatile("vpsraw $4, %ymm9, %ymm12"); | |
80 | asm volatile("vpand %ymm7, %ymm1, %ymm1"); | |
81 | asm volatile("vpand %ymm7, %ymm9, %ymm9"); | |
82 | asm volatile("vpand %ymm7, %ymm3, %ymm3"); | |
83 | asm volatile("vpand %ymm7, %ymm12, %ymm12"); | |
84 | asm volatile("vpshufb %ymm9, %ymm4, %ymm14"); | |
85 | asm volatile("vpshufb %ymm1, %ymm4, %ymm4"); | |
86 | asm volatile("vpshufb %ymm12, %ymm5, %ymm15"); | |
87 | asm volatile("vpshufb %ymm3, %ymm5, %ymm5"); | |
88 | asm volatile("vpxor %ymm14, %ymm15, %ymm15"); | |
89 | asm volatile("vpxor %ymm4, %ymm5, %ymm5"); | |
90 | ||
91 | /* | |
92 | * 5 = qx[0] | |
93 | * 15 = qx[32] | |
94 | */ | |
95 | ||
96 | asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (pbmul[0])); | |
97 | asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (pbmul[16])); | |
98 | asm volatile("vpsraw $4, %ymm0, %ymm2"); | |
99 | asm volatile("vpsraw $4, %ymm8, %ymm6"); | |
100 | asm volatile("vpand %ymm7, %ymm0, %ymm3"); | |
101 | asm volatile("vpand %ymm7, %ymm8, %ymm14"); | |
102 | asm volatile("vpand %ymm7, %ymm2, %ymm2"); | |
103 | asm volatile("vpand %ymm7, %ymm6, %ymm6"); | |
104 | asm volatile("vpshufb %ymm14, %ymm4, %ymm12"); | |
105 | asm volatile("vpshufb %ymm3, %ymm4, %ymm4"); | |
106 | asm volatile("vpshufb %ymm6, %ymm1, %ymm13"); | |
107 | asm volatile("vpshufb %ymm2, %ymm1, %ymm1"); | |
108 | asm volatile("vpxor %ymm4, %ymm1, %ymm1"); | |
109 | asm volatile("vpxor %ymm12, %ymm13, %ymm13"); | |
110 | ||
111 | /* | |
112 | * 1 = pbmul[px[0]] | |
113 | * 13 = pbmul[px[32]] | |
114 | */ | |
115 | asm volatile("vpxor %ymm5, %ymm1, %ymm1"); | |
116 | asm volatile("vpxor %ymm15, %ymm13, %ymm13"); | |
117 | ||
118 | /* | |
119 | * 1 = db = DQ | |
120 | * 13 = db[32] = DQ[32] | |
121 | */ | |
122 | asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); | |
123 | asm volatile("vmovdqa %%ymm13,%0" : "=m" (dq[32])); | |
124 | asm volatile("vpxor %ymm1, %ymm0, %ymm0"); | |
125 | asm volatile("vpxor %ymm13, %ymm8, %ymm8"); | |
126 | ||
127 | asm volatile("vmovdqa %%ymm0, %0" : "=m" (dp[0])); | |
128 | asm volatile("vmovdqa %%ymm8, %0" : "=m" (dp[32])); | |
129 | ||
130 | bytes -= 64; | |
131 | p += 64; | |
132 | q += 64; | |
133 | dp += 64; | |
134 | dq += 64; | |
135 | #else | |
136 | asm volatile("vmovdqa %0, %%ymm1" : : "m" (*q)); | |
137 | asm volatile("vmovdqa %0, %%ymm0" : : "m" (*p)); | |
138 | asm volatile("vpxor %0, %%ymm1, %%ymm1" : : "m" (*dq)); | |
139 | asm volatile("vpxor %0, %%ymm0, %%ymm0" : : "m" (*dp)); | |
140 | ||
141 | /* 1 = dq ^ q; 0 = dp ^ p */ | |
142 | ||
143 | asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (qmul[0])); | |
144 | asm volatile("vbroadcasti128 %0, %%ymm5" : : "m" (qmul[16])); | |
145 | ||
146 | /* | |
147 | * 1 = dq ^ q | |
148 | * 3 = dq ^ p >> 4 | |
149 | */ | |
150 | asm volatile("vpsraw $4, %ymm1, %ymm3"); | |
151 | asm volatile("vpand %ymm7, %ymm1, %ymm1"); | |
152 | asm volatile("vpand %ymm7, %ymm3, %ymm3"); | |
153 | asm volatile("vpshufb %ymm1, %ymm4, %ymm4"); | |
154 | asm volatile("vpshufb %ymm3, %ymm5, %ymm5"); | |
155 | asm volatile("vpxor %ymm4, %ymm5, %ymm5"); | |
156 | ||
157 | /* 5 = qx */ | |
158 | ||
159 | asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (pbmul[0])); | |
160 | asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (pbmul[16])); | |
161 | ||
162 | asm volatile("vpsraw $4, %ymm0, %ymm2"); | |
163 | asm volatile("vpand %ymm7, %ymm0, %ymm3"); | |
164 | asm volatile("vpand %ymm7, %ymm2, %ymm2"); | |
165 | asm volatile("vpshufb %ymm3, %ymm4, %ymm4"); | |
166 | asm volatile("vpshufb %ymm2, %ymm1, %ymm1"); | |
167 | asm volatile("vpxor %ymm4, %ymm1, %ymm1"); | |
168 | ||
169 | /* 1 = pbmul[px] */ | |
170 | asm volatile("vpxor %ymm5, %ymm1, %ymm1"); | |
171 | /* 1 = db = DQ */ | |
172 | asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); | |
173 | ||
174 | asm volatile("vpxor %ymm1, %ymm0, %ymm0"); | |
175 | asm volatile("vmovdqa %%ymm0, %0" : "=m" (dp[0])); | |
176 | ||
177 | bytes -= 32; | |
178 | p += 32; | |
179 | q += 32; | |
180 | dp += 32; | |
181 | dq += 32; | |
182 | #endif | |
183 | } | |
184 | ||
185 | kernel_fpu_end(); | |
186 | } | |
187 | ||
188 | static void raid6_datap_recov_avx2(int disks, size_t bytes, int faila, | |
189 | void **ptrs) | |
190 | { | |
191 | u8 *p, *q, *dq; | |
192 | const u8 *qmul; /* Q multiplier table */ | |
193 | const u8 x0f = 0x0f; | |
194 | ||
195 | p = (u8 *)ptrs[disks-2]; | |
196 | q = (u8 *)ptrs[disks-1]; | |
197 | ||
198 | /* Compute syndrome with zero for the missing data page | |
199 | Use the dead data page as temporary storage for delta q */ | |
200 | dq = (u8 *)ptrs[faila]; | |
201 | ptrs[faila] = (void *)raid6_empty_zero_page; | |
202 | ptrs[disks-1] = dq; | |
203 | ||
204 | raid6_call.gen_syndrome(disks, bytes, ptrs); | |
205 | ||
206 | /* Restore pointer table */ | |
207 | ptrs[faila] = dq; | |
208 | ptrs[disks-1] = q; | |
209 | ||
210 | /* Now, pick the proper data tables */ | |
211 | qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]]; | |
212 | ||
213 | kernel_fpu_begin(); | |
214 | ||
215 | asm volatile("vpbroadcastb %0, %%ymm7" : : "m" (x0f)); | |
216 | ||
217 | while (bytes) { | |
218 | #ifdef CONFIG_X86_64 | |
219 | asm volatile("vmovdqa %0, %%ymm3" : : "m" (dq[0])); | |
220 | asm volatile("vmovdqa %0, %%ymm8" : : "m" (dq[32])); | |
221 | asm volatile("vpxor %0, %%ymm3, %%ymm3" : : "m" (q[0])); | |
222 | asm volatile("vpxor %0, %%ymm8, %%ymm8" : : "m" (q[32])); | |
223 | ||
224 | /* | |
225 | * 3 = q[0] ^ dq[0] | |
226 | * 8 = q[32] ^ dq[32] | |
227 | */ | |
228 | asm volatile("vbroadcasti128 %0, %%ymm0" : : "m" (qmul[0])); | |
229 | asm volatile("vmovapd %ymm0, %ymm13"); | |
230 | asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (qmul[16])); | |
231 | asm volatile("vmovapd %ymm1, %ymm14"); | |
232 | ||
233 | asm volatile("vpsraw $4, %ymm3, %ymm6"); | |
234 | asm volatile("vpsraw $4, %ymm8, %ymm12"); | |
235 | asm volatile("vpand %ymm7, %ymm3, %ymm3"); | |
236 | asm volatile("vpand %ymm7, %ymm8, %ymm8"); | |
237 | asm volatile("vpand %ymm7, %ymm6, %ymm6"); | |
238 | asm volatile("vpand %ymm7, %ymm12, %ymm12"); | |
239 | asm volatile("vpshufb %ymm3, %ymm0, %ymm0"); | |
240 | asm volatile("vpshufb %ymm8, %ymm13, %ymm13"); | |
241 | asm volatile("vpshufb %ymm6, %ymm1, %ymm1"); | |
242 | asm volatile("vpshufb %ymm12, %ymm14, %ymm14"); | |
243 | asm volatile("vpxor %ymm0, %ymm1, %ymm1"); | |
244 | asm volatile("vpxor %ymm13, %ymm14, %ymm14"); | |
245 | ||
246 | /* | |
247 | * 1 = qmul[q[0] ^ dq[0]] | |
248 | * 14 = qmul[q[32] ^ dq[32]] | |
249 | */ | |
250 | asm volatile("vmovdqa %0, %%ymm2" : : "m" (p[0])); | |
251 | asm volatile("vmovdqa %0, %%ymm12" : : "m" (p[32])); | |
252 | asm volatile("vpxor %ymm1, %ymm2, %ymm2"); | |
253 | asm volatile("vpxor %ymm14, %ymm12, %ymm12"); | |
254 | ||
255 | /* | |
256 | * 2 = p[0] ^ qmul[q[0] ^ dq[0]] | |
257 | * 12 = p[32] ^ qmul[q[32] ^ dq[32]] | |
258 | */ | |
259 | ||
260 | asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); | |
261 | asm volatile("vmovdqa %%ymm14, %0" : "=m" (dq[32])); | |
262 | asm volatile("vmovdqa %%ymm2, %0" : "=m" (p[0])); | |
263 | asm volatile("vmovdqa %%ymm12,%0" : "=m" (p[32])); | |
264 | ||
265 | bytes -= 64; | |
266 | p += 64; | |
267 | q += 64; | |
268 | dq += 64; | |
269 | #else | |
270 | asm volatile("vmovdqa %0, %%ymm3" : : "m" (dq[0])); | |
271 | asm volatile("vpxor %0, %%ymm3, %%ymm3" : : "m" (q[0])); | |
272 | ||
273 | /* 3 = q ^ dq */ | |
274 | ||
275 | asm volatile("vbroadcasti128 %0, %%ymm0" : : "m" (qmul[0])); | |
276 | asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (qmul[16])); | |
277 | ||
278 | asm volatile("vpsraw $4, %ymm3, %ymm6"); | |
279 | asm volatile("vpand %ymm7, %ymm3, %ymm3"); | |
280 | asm volatile("vpand %ymm7, %ymm6, %ymm6"); | |
281 | asm volatile("vpshufb %ymm3, %ymm0, %ymm0"); | |
282 | asm volatile("vpshufb %ymm6, %ymm1, %ymm1"); | |
283 | asm volatile("vpxor %ymm0, %ymm1, %ymm1"); | |
284 | ||
285 | /* 1 = qmul[q ^ dq] */ | |
286 | ||
287 | asm volatile("vmovdqa %0, %%ymm2" : : "m" (p[0])); | |
288 | asm volatile("vpxor %ymm1, %ymm2, %ymm2"); | |
289 | ||
290 | /* 2 = p ^ qmul[q ^ dq] */ | |
291 | ||
292 | asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); | |
293 | asm volatile("vmovdqa %%ymm2, %0" : "=m" (p[0])); | |
294 | ||
295 | bytes -= 32; | |
296 | p += 32; | |
297 | q += 32; | |
298 | dq += 32; | |
299 | #endif | |
300 | } | |
301 | ||
302 | kernel_fpu_end(); | |
303 | } | |
304 | ||
305 | const struct raid6_recov_calls raid6_recov_avx2 = { | |
306 | .data2 = raid6_2data_recov_avx2, | |
307 | .datap = raid6_datap_recov_avx2, | |
308 | .valid = raid6_has_avx2, | |
309 | #ifdef CONFIG_X86_64 | |
310 | .name = "avx2x2", | |
311 | #else | |
312 | .name = "avx2x1", | |
313 | #endif | |
314 | .priority = 2, | |
315 | }; | |
316 | ||
317 | #else | |
318 | #warning "your version of binutils lacks AVX2 support" | |
319 | #endif |