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