1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* -*- linux-c -*- --------------------------- 1 /* -*- linux-c -*- ------------------------------------------------------- *
3 * 2 *
4 * Copyright 2002 H. Peter Anvin - All Right 3 * Copyright 2002 H. Peter Anvin - All Rights Reserved
>> 4 *
>> 5 * This program is free software; you can redistribute it and/or modify
>> 6 * it under the terms of the GNU General Public License as published by
>> 7 * the Free Software Foundation, Inc., 53 Temple Place Ste 330,
>> 8 * Boston MA 02111-1307, USA; either version 2 of the License, or
>> 9 * (at your option) any later version; incorporated herein by reference.
5 * 10 *
6 * ------------------------------------------- 11 * ----------------------------------------------------------------------- */
7 12
8 /* 13 /*
9 * raid6/sse2.c 14 * raid6/sse2.c
10 * 15 *
11 * SSE-2 implementation of RAID-6 syndrome fun 16 * SSE-2 implementation of RAID-6 syndrome functions
12 * 17 *
13 */ 18 */
14 19
15 #include <linux/raid/pq.h> 20 #include <linux/raid/pq.h>
16 #include "x86.h" 21 #include "x86.h"
17 22
18 static const struct raid6_sse_constants { 23 static const struct raid6_sse_constants {
19 u64 x1d[2]; 24 u64 x1d[2];
20 } raid6_sse_constants __attribute__((aligned( 25 } raid6_sse_constants __attribute__((aligned(16))) = {
21 { 0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1 26 { 0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL },
22 }; 27 };
23 28
24 static int raid6_have_sse2(void) 29 static int raid6_have_sse2(void)
25 { 30 {
26 /* Not really boot_cpu but "all_cpus" 31 /* Not really boot_cpu but "all_cpus" */
27 return boot_cpu_has(X86_FEATURE_MMX) & 32 return boot_cpu_has(X86_FEATURE_MMX) &&
28 boot_cpu_has(X86_FEATURE_FXSR) 33 boot_cpu_has(X86_FEATURE_FXSR) &&
29 boot_cpu_has(X86_FEATURE_XMM) 34 boot_cpu_has(X86_FEATURE_XMM) &&
30 boot_cpu_has(X86_FEATURE_XMM2) 35 boot_cpu_has(X86_FEATURE_XMM2);
31 } 36 }
32 37
33 /* 38 /*
34 * Plain SSE2 implementation 39 * Plain SSE2 implementation
35 */ 40 */
36 static void raid6_sse21_gen_syndrome(int disks 41 static void raid6_sse21_gen_syndrome(int disks, size_t bytes, void **ptrs)
37 { 42 {
38 u8 **dptr = (u8 **)ptrs; 43 u8 **dptr = (u8 **)ptrs;
39 u8 *p, *q; 44 u8 *p, *q;
40 int d, z, z0; 45 int d, z, z0;
41 46
42 z0 = disks - 3; /* Highest dat 47 z0 = disks - 3; /* Highest data disk */
43 p = dptr[z0+1]; /* XOR parity 48 p = dptr[z0+1]; /* XOR parity */
44 q = dptr[z0+2]; /* RS syndrome 49 q = dptr[z0+2]; /* RS syndrome */
45 50
46 kernel_fpu_begin(); 51 kernel_fpu_begin();
47 52
48 asm volatile("movdqa %0,%%xmm0" : : "m 53 asm volatile("movdqa %0,%%xmm0" : : "m" (raid6_sse_constants.x1d[0]));
49 asm volatile("pxor %xmm5,%xmm5"); 54 asm volatile("pxor %xmm5,%xmm5"); /* Zero temp */
50 55
51 for ( d = 0 ; d < bytes ; d += 16 ) { 56 for ( d = 0 ; d < bytes ; d += 16 ) {
52 asm volatile("prefetchnta %0" 57 asm volatile("prefetchnta %0" : : "m" (dptr[z0][d]));
53 asm volatile("movdqa %0,%%xmm2 58 asm volatile("movdqa %0,%%xmm2" : : "m" (dptr[z0][d])); /* P[0] */
54 asm volatile("prefetchnta %0" 59 asm volatile("prefetchnta %0" : : "m" (dptr[z0-1][d]));
55 asm volatile("movdqa %xmm2,%xm 60 asm volatile("movdqa %xmm2,%xmm4"); /* Q[0] */
56 asm volatile("movdqa %0,%%xmm6 61 asm volatile("movdqa %0,%%xmm6" : : "m" (dptr[z0-1][d]));
57 for ( z = z0-2 ; z >= 0 ; z-- 62 for ( z = z0-2 ; z >= 0 ; z-- ) {
58 asm volatile("prefetch 63 asm volatile("prefetchnta %0" : : "m" (dptr[z][d]));
59 asm volatile("pcmpgtb 64 asm volatile("pcmpgtb %xmm4,%xmm5");
60 asm volatile("paddb %x 65 asm volatile("paddb %xmm4,%xmm4");
61 asm volatile("pand %xm 66 asm volatile("pand %xmm0,%xmm5");
62 asm volatile("pxor %xm 67 asm volatile("pxor %xmm5,%xmm4");
63 asm volatile("pxor %xm 68 asm volatile("pxor %xmm5,%xmm5");
64 asm volatile("pxor %xm 69 asm volatile("pxor %xmm6,%xmm2");
65 asm volatile("pxor %xm 70 asm volatile("pxor %xmm6,%xmm4");
66 asm volatile("movdqa % 71 asm volatile("movdqa %0,%%xmm6" : : "m" (dptr[z][d]));
67 } 72 }
68 asm volatile("pcmpgtb %xmm4,%x 73 asm volatile("pcmpgtb %xmm4,%xmm5");
69 asm volatile("paddb %xmm4,%xmm 74 asm volatile("paddb %xmm4,%xmm4");
70 asm volatile("pand %xmm0,%xmm5 75 asm volatile("pand %xmm0,%xmm5");
71 asm volatile("pxor %xmm5,%xmm4 76 asm volatile("pxor %xmm5,%xmm4");
72 asm volatile("pxor %xmm5,%xmm5 77 asm volatile("pxor %xmm5,%xmm5");
73 asm volatile("pxor %xmm6,%xmm2 78 asm volatile("pxor %xmm6,%xmm2");
74 asm volatile("pxor %xmm6,%xmm4 79 asm volatile("pxor %xmm6,%xmm4");
75 80
76 asm volatile("movntdq %%xmm2,% 81 asm volatile("movntdq %%xmm2,%0" : "=m" (p[d]));
77 asm volatile("pxor %xmm2,%xmm2 82 asm volatile("pxor %xmm2,%xmm2");
78 asm volatile("movntdq %%xmm4,% 83 asm volatile("movntdq %%xmm4,%0" : "=m" (q[d]));
79 asm volatile("pxor %xmm4,%xmm4 84 asm volatile("pxor %xmm4,%xmm4");
80 } 85 }
81 86
82 asm volatile("sfence" : : : "memory"); 87 asm volatile("sfence" : : : "memory");
83 kernel_fpu_end(); 88 kernel_fpu_end();
84 } 89 }
85 90
86 91
87 static void raid6_sse21_xor_syndrome(int disks 92 static void raid6_sse21_xor_syndrome(int disks, int start, int stop,
88 size_t by 93 size_t bytes, void **ptrs)
89 { 94 {
90 u8 **dptr = (u8 **)ptrs; 95 u8 **dptr = (u8 **)ptrs;
91 u8 *p, *q; 96 u8 *p, *q;
92 int d, z, z0; 97 int d, z, z0;
93 98
94 z0 = stop; /* P/Q right s 99 z0 = stop; /* P/Q right side optimization */
95 p = dptr[disks-2]; /* XOR parity 100 p = dptr[disks-2]; /* XOR parity */
96 q = dptr[disks-1]; /* RS syndrome 101 q = dptr[disks-1]; /* RS syndrome */
97 102
98 kernel_fpu_begin(); 103 kernel_fpu_begin();
99 104
100 asm volatile("movdqa %0,%%xmm0" : : "m 105 asm volatile("movdqa %0,%%xmm0" : : "m" (raid6_sse_constants.x1d[0]));
101 106
102 for ( d = 0 ; d < bytes ; d += 16 ) { 107 for ( d = 0 ; d < bytes ; d += 16 ) {
103 asm volatile("movdqa %0,%%xmm4 108 asm volatile("movdqa %0,%%xmm4" :: "m" (dptr[z0][d]));
104 asm volatile("movdqa %0,%%xmm2 109 asm volatile("movdqa %0,%%xmm2" : : "m" (p[d]));
105 asm volatile("pxor %xmm4,%xmm2 110 asm volatile("pxor %xmm4,%xmm2");
106 /* P/Q data pages */ 111 /* P/Q data pages */
107 for ( z = z0-1 ; z >= start ; 112 for ( z = z0-1 ; z >= start ; z-- ) {
108 asm volatile("pxor %xm 113 asm volatile("pxor %xmm5,%xmm5");
109 asm volatile("pcmpgtb 114 asm volatile("pcmpgtb %xmm4,%xmm5");
110 asm volatile("paddb %x 115 asm volatile("paddb %xmm4,%xmm4");
111 asm volatile("pand %xm 116 asm volatile("pand %xmm0,%xmm5");
112 asm volatile("pxor %xm 117 asm volatile("pxor %xmm5,%xmm4");
113 asm volatile("movdqa % 118 asm volatile("movdqa %0,%%xmm5" :: "m" (dptr[z][d]));
114 asm volatile("pxor %xm 119 asm volatile("pxor %xmm5,%xmm2");
115 asm volatile("pxor %xm 120 asm volatile("pxor %xmm5,%xmm4");
116 } 121 }
117 /* P/Q left side optimization 122 /* P/Q left side optimization */
118 for ( z = start-1 ; z >= 0 ; z 123 for ( z = start-1 ; z >= 0 ; z-- ) {
119 asm volatile("pxor %xm 124 asm volatile("pxor %xmm5,%xmm5");
120 asm volatile("pcmpgtb 125 asm volatile("pcmpgtb %xmm4,%xmm5");
121 asm volatile("paddb %x 126 asm volatile("paddb %xmm4,%xmm4");
122 asm volatile("pand %xm 127 asm volatile("pand %xmm0,%xmm5");
123 asm volatile("pxor %xm 128 asm volatile("pxor %xmm5,%xmm4");
124 } 129 }
125 asm volatile("pxor %0,%%xmm4" 130 asm volatile("pxor %0,%%xmm4" : : "m" (q[d]));
126 /* Don't use movntdq for r/w m 131 /* Don't use movntdq for r/w memory area < cache line */
127 asm volatile("movdqa %%xmm4,%0 132 asm volatile("movdqa %%xmm4,%0" : "=m" (q[d]));
128 asm volatile("movdqa %%xmm2,%0 133 asm volatile("movdqa %%xmm2,%0" : "=m" (p[d]));
129 } 134 }
130 135
131 asm volatile("sfence" : : : "memory"); 136 asm volatile("sfence" : : : "memory");
132 kernel_fpu_end(); 137 kernel_fpu_end();
133 } 138 }
134 139
135 const struct raid6_calls raid6_sse2x1 = { 140 const struct raid6_calls raid6_sse2x1 = {
136 raid6_sse21_gen_syndrome, 141 raid6_sse21_gen_syndrome,
137 raid6_sse21_xor_syndrome, 142 raid6_sse21_xor_syndrome,
138 raid6_have_sse2, 143 raid6_have_sse2,
139 "sse2x1", 144 "sse2x1",
140 1 /* Has cache h 145 1 /* Has cache hints */
141 }; 146 };
142 147
143 /* 148 /*
144 * Unrolled-by-2 SSE2 implementation 149 * Unrolled-by-2 SSE2 implementation
145 */ 150 */
146 static void raid6_sse22_gen_syndrome(int disks 151 static void raid6_sse22_gen_syndrome(int disks, size_t bytes, void **ptrs)
147 { 152 {
148 u8 **dptr = (u8 **)ptrs; 153 u8 **dptr = (u8 **)ptrs;
149 u8 *p, *q; 154 u8 *p, *q;
150 int d, z, z0; 155 int d, z, z0;
151 156
152 z0 = disks - 3; /* Highest dat 157 z0 = disks - 3; /* Highest data disk */
153 p = dptr[z0+1]; /* XOR parity 158 p = dptr[z0+1]; /* XOR parity */
154 q = dptr[z0+2]; /* RS syndrome 159 q = dptr[z0+2]; /* RS syndrome */
155 160
156 kernel_fpu_begin(); 161 kernel_fpu_begin();
157 162
158 asm volatile("movdqa %0,%%xmm0" : : "m 163 asm volatile("movdqa %0,%%xmm0" : : "m" (raid6_sse_constants.x1d[0]));
159 asm volatile("pxor %xmm5,%xmm5"); /* Z 164 asm volatile("pxor %xmm5,%xmm5"); /* Zero temp */
160 asm volatile("pxor %xmm7,%xmm7"); /* Z 165 asm volatile("pxor %xmm7,%xmm7"); /* Zero temp */
161 166
162 /* We uniformly assume a single prefet 167 /* We uniformly assume a single prefetch covers at least 32 bytes */
163 for ( d = 0 ; d < bytes ; d += 32 ) { 168 for ( d = 0 ; d < bytes ; d += 32 ) {
164 asm volatile("prefetchnta %0" 169 asm volatile("prefetchnta %0" : : "m" (dptr[z0][d]));
165 asm volatile("movdqa %0,%%xmm2 170 asm volatile("movdqa %0,%%xmm2" : : "m" (dptr[z0][d])); /* P[0] */
166 asm volatile("movdqa %0,%%xmm3 171 asm volatile("movdqa %0,%%xmm3" : : "m" (dptr[z0][d+16])); /* P[1] */
167 asm volatile("movdqa %xmm2,%xm 172 asm volatile("movdqa %xmm2,%xmm4"); /* Q[0] */
168 asm volatile("movdqa %xmm3,%xm 173 asm volatile("movdqa %xmm3,%xmm6"); /* Q[1] */
169 for ( z = z0-1 ; z >= 0 ; z-- 174 for ( z = z0-1 ; z >= 0 ; z-- ) {
170 asm volatile("prefetch 175 asm volatile("prefetchnta %0" : : "m" (dptr[z][d]));
171 asm volatile("pcmpgtb 176 asm volatile("pcmpgtb %xmm4,%xmm5");
172 asm volatile("pcmpgtb 177 asm volatile("pcmpgtb %xmm6,%xmm7");
173 asm volatile("paddb %x 178 asm volatile("paddb %xmm4,%xmm4");
174 asm volatile("paddb %x 179 asm volatile("paddb %xmm6,%xmm6");
175 asm volatile("pand %xm 180 asm volatile("pand %xmm0,%xmm5");
176 asm volatile("pand %xm 181 asm volatile("pand %xmm0,%xmm7");
177 asm volatile("pxor %xm 182 asm volatile("pxor %xmm5,%xmm4");
178 asm volatile("pxor %xm 183 asm volatile("pxor %xmm7,%xmm6");
179 asm volatile("movdqa % 184 asm volatile("movdqa %0,%%xmm5" : : "m" (dptr[z][d]));
180 asm volatile("movdqa % 185 asm volatile("movdqa %0,%%xmm7" : : "m" (dptr[z][d+16]));
181 asm volatile("pxor %xm 186 asm volatile("pxor %xmm5,%xmm2");
182 asm volatile("pxor %xm 187 asm volatile("pxor %xmm7,%xmm3");
183 asm volatile("pxor %xm 188 asm volatile("pxor %xmm5,%xmm4");
184 asm volatile("pxor %xm 189 asm volatile("pxor %xmm7,%xmm6");
185 asm volatile("pxor %xm 190 asm volatile("pxor %xmm5,%xmm5");
186 asm volatile("pxor %xm 191 asm volatile("pxor %xmm7,%xmm7");
187 } 192 }
188 asm volatile("movntdq %%xmm2,% 193 asm volatile("movntdq %%xmm2,%0" : "=m" (p[d]));
189 asm volatile("movntdq %%xmm3,% 194 asm volatile("movntdq %%xmm3,%0" : "=m" (p[d+16]));
190 asm volatile("movntdq %%xmm4,% 195 asm volatile("movntdq %%xmm4,%0" : "=m" (q[d]));
191 asm volatile("movntdq %%xmm6,% 196 asm volatile("movntdq %%xmm6,%0" : "=m" (q[d+16]));
192 } 197 }
193 198
194 asm volatile("sfence" : : : "memory"); 199 asm volatile("sfence" : : : "memory");
195 kernel_fpu_end(); 200 kernel_fpu_end();
196 } 201 }
197 202
198 static void raid6_sse22_xor_syndrome(int disks 203 static void raid6_sse22_xor_syndrome(int disks, int start, int stop,
199 size_t by 204 size_t bytes, void **ptrs)
200 { 205 {
201 u8 **dptr = (u8 **)ptrs; 206 u8 **dptr = (u8 **)ptrs;
202 u8 *p, *q; 207 u8 *p, *q;
203 int d, z, z0; 208 int d, z, z0;
204 209
205 z0 = stop; /* P/Q right s 210 z0 = stop; /* P/Q right side optimization */
206 p = dptr[disks-2]; /* XOR parity 211 p = dptr[disks-2]; /* XOR parity */
207 q = dptr[disks-1]; /* RS syndrome 212 q = dptr[disks-1]; /* RS syndrome */
208 213
209 kernel_fpu_begin(); 214 kernel_fpu_begin();
210 215
211 asm volatile("movdqa %0,%%xmm0" : : "m 216 asm volatile("movdqa %0,%%xmm0" : : "m" (raid6_sse_constants.x1d[0]));
212 217
213 for ( d = 0 ; d < bytes ; d += 32 ) { 218 for ( d = 0 ; d < bytes ; d += 32 ) {
214 asm volatile("movdqa %0,%%xmm4 219 asm volatile("movdqa %0,%%xmm4" :: "m" (dptr[z0][d]));
215 asm volatile("movdqa %0,%%xmm6 220 asm volatile("movdqa %0,%%xmm6" :: "m" (dptr[z0][d+16]));
216 asm volatile("movdqa %0,%%xmm2 221 asm volatile("movdqa %0,%%xmm2" : : "m" (p[d]));
217 asm volatile("movdqa %0,%%xmm3 222 asm volatile("movdqa %0,%%xmm3" : : "m" (p[d+16]));
218 asm volatile("pxor %xmm4,%xmm2 223 asm volatile("pxor %xmm4,%xmm2");
219 asm volatile("pxor %xmm6,%xmm3 224 asm volatile("pxor %xmm6,%xmm3");
220 /* P/Q data pages */ 225 /* P/Q data pages */
221 for ( z = z0-1 ; z >= start ; 226 for ( z = z0-1 ; z >= start ; z-- ) {
222 asm volatile("pxor %xm 227 asm volatile("pxor %xmm5,%xmm5");
223 asm volatile("pxor %xm 228 asm volatile("pxor %xmm7,%xmm7");
224 asm volatile("pcmpgtb 229 asm volatile("pcmpgtb %xmm4,%xmm5");
225 asm volatile("pcmpgtb 230 asm volatile("pcmpgtb %xmm6,%xmm7");
226 asm volatile("paddb %x 231 asm volatile("paddb %xmm4,%xmm4");
227 asm volatile("paddb %x 232 asm volatile("paddb %xmm6,%xmm6");
228 asm volatile("pand %xm 233 asm volatile("pand %xmm0,%xmm5");
229 asm volatile("pand %xm 234 asm volatile("pand %xmm0,%xmm7");
230 asm volatile("pxor %xm 235 asm volatile("pxor %xmm5,%xmm4");
231 asm volatile("pxor %xm 236 asm volatile("pxor %xmm7,%xmm6");
232 asm volatile("movdqa % 237 asm volatile("movdqa %0,%%xmm5" :: "m" (dptr[z][d]));
233 asm volatile("movdqa % 238 asm volatile("movdqa %0,%%xmm7" :: "m" (dptr[z][d+16]));
234 asm volatile("pxor %xm 239 asm volatile("pxor %xmm5,%xmm2");
235 asm volatile("pxor %xm 240 asm volatile("pxor %xmm7,%xmm3");
236 asm volatile("pxor %xm 241 asm volatile("pxor %xmm5,%xmm4");
237 asm volatile("pxor %xm 242 asm volatile("pxor %xmm7,%xmm6");
238 } 243 }
239 /* P/Q left side optimization 244 /* P/Q left side optimization */
240 for ( z = start-1 ; z >= 0 ; z 245 for ( z = start-1 ; z >= 0 ; z-- ) {
241 asm volatile("pxor %xm 246 asm volatile("pxor %xmm5,%xmm5");
242 asm volatile("pxor %xm 247 asm volatile("pxor %xmm7,%xmm7");
243 asm volatile("pcmpgtb 248 asm volatile("pcmpgtb %xmm4,%xmm5");
244 asm volatile("pcmpgtb 249 asm volatile("pcmpgtb %xmm6,%xmm7");
245 asm volatile("paddb %x 250 asm volatile("paddb %xmm4,%xmm4");
246 asm volatile("paddb %x 251 asm volatile("paddb %xmm6,%xmm6");
247 asm volatile("pand %xm 252 asm volatile("pand %xmm0,%xmm5");
248 asm volatile("pand %xm 253 asm volatile("pand %xmm0,%xmm7");
249 asm volatile("pxor %xm 254 asm volatile("pxor %xmm5,%xmm4");
250 asm volatile("pxor %xm 255 asm volatile("pxor %xmm7,%xmm6");
251 } 256 }
252 asm volatile("pxor %0,%%xmm4" 257 asm volatile("pxor %0,%%xmm4" : : "m" (q[d]));
253 asm volatile("pxor %0,%%xmm6" 258 asm volatile("pxor %0,%%xmm6" : : "m" (q[d+16]));
254 /* Don't use movntdq for r/w m 259 /* Don't use movntdq for r/w memory area < cache line */
255 asm volatile("movdqa %%xmm4,%0 260 asm volatile("movdqa %%xmm4,%0" : "=m" (q[d]));
256 asm volatile("movdqa %%xmm6,%0 261 asm volatile("movdqa %%xmm6,%0" : "=m" (q[d+16]));
257 asm volatile("movdqa %%xmm2,%0 262 asm volatile("movdqa %%xmm2,%0" : "=m" (p[d]));
258 asm volatile("movdqa %%xmm3,%0 263 asm volatile("movdqa %%xmm3,%0" : "=m" (p[d+16]));
259 } 264 }
260 265
261 asm volatile("sfence" : : : "memory"); 266 asm volatile("sfence" : : : "memory");
262 kernel_fpu_end(); 267 kernel_fpu_end();
263 } 268 }
264 269
265 const struct raid6_calls raid6_sse2x2 = { 270 const struct raid6_calls raid6_sse2x2 = {
266 raid6_sse22_gen_syndrome, 271 raid6_sse22_gen_syndrome,
267 raid6_sse22_xor_syndrome, 272 raid6_sse22_xor_syndrome,
268 raid6_have_sse2, 273 raid6_have_sse2,
269 "sse2x2", 274 "sse2x2",
270 1 /* Has cache h 275 1 /* Has cache hints */
271 }; 276 };
272 277
273 #ifdef CONFIG_X86_64 278 #ifdef CONFIG_X86_64
274 279
275 /* 280 /*
276 * Unrolled-by-4 SSE2 implementation 281 * Unrolled-by-4 SSE2 implementation
277 */ 282 */
278 static void raid6_sse24_gen_syndrome(int disks 283 static void raid6_sse24_gen_syndrome(int disks, size_t bytes, void **ptrs)
279 { 284 {
280 u8 **dptr = (u8 **)ptrs; 285 u8 **dptr = (u8 **)ptrs;
281 u8 *p, *q; 286 u8 *p, *q;
282 int d, z, z0; 287 int d, z, z0;
283 288
284 z0 = disks - 3; /* Highest dat 289 z0 = disks - 3; /* Highest data disk */
285 p = dptr[z0+1]; /* XOR parity 290 p = dptr[z0+1]; /* XOR parity */
286 q = dptr[z0+2]; /* RS syndrome 291 q = dptr[z0+2]; /* RS syndrome */
287 292
288 kernel_fpu_begin(); 293 kernel_fpu_begin();
289 294
290 asm volatile("movdqa %0,%%xmm0" :: "m" 295 asm volatile("movdqa %0,%%xmm0" :: "m" (raid6_sse_constants.x1d[0]));
291 asm volatile("pxor %xmm2,%xmm2"); 296 asm volatile("pxor %xmm2,%xmm2"); /* P[0] */
292 asm volatile("pxor %xmm3,%xmm3"); 297 asm volatile("pxor %xmm3,%xmm3"); /* P[1] */
293 asm volatile("pxor %xmm4,%xmm4"); 298 asm volatile("pxor %xmm4,%xmm4"); /* Q[0] */
294 asm volatile("pxor %xmm5,%xmm5"); 299 asm volatile("pxor %xmm5,%xmm5"); /* Zero temp */
295 asm volatile("pxor %xmm6,%xmm6"); 300 asm volatile("pxor %xmm6,%xmm6"); /* Q[1] */
296 asm volatile("pxor %xmm7,%xmm7"); 301 asm volatile("pxor %xmm7,%xmm7"); /* Zero temp */
297 asm volatile("pxor %xmm10,%xmm10"); 302 asm volatile("pxor %xmm10,%xmm10"); /* P[2] */
298 asm volatile("pxor %xmm11,%xmm11"); 303 asm volatile("pxor %xmm11,%xmm11"); /* P[3] */
299 asm volatile("pxor %xmm12,%xmm12"); 304 asm volatile("pxor %xmm12,%xmm12"); /* Q[2] */
300 asm volatile("pxor %xmm13,%xmm13"); 305 asm volatile("pxor %xmm13,%xmm13"); /* Zero temp */
301 asm volatile("pxor %xmm14,%xmm14"); 306 asm volatile("pxor %xmm14,%xmm14"); /* Q[3] */
302 asm volatile("pxor %xmm15,%xmm15"); 307 asm volatile("pxor %xmm15,%xmm15"); /* Zero temp */
303 308
304 for ( d = 0 ; d < bytes ; d += 64 ) { 309 for ( d = 0 ; d < bytes ; d += 64 ) {
305 for ( z = z0 ; z >= 0 ; z-- ) 310 for ( z = z0 ; z >= 0 ; z-- ) {
306 /* The second prefetch 311 /* The second prefetch seems to improve performance... */
307 asm volatile("prefetch 312 asm volatile("prefetchnta %0" :: "m" (dptr[z][d]));
308 asm volatile("prefetch 313 asm volatile("prefetchnta %0" :: "m" (dptr[z][d+32]));
309 asm volatile("pcmpgtb 314 asm volatile("pcmpgtb %xmm4,%xmm5");
310 asm volatile("pcmpgtb 315 asm volatile("pcmpgtb %xmm6,%xmm7");
311 asm volatile("pcmpgtb 316 asm volatile("pcmpgtb %xmm12,%xmm13");
312 asm volatile("pcmpgtb 317 asm volatile("pcmpgtb %xmm14,%xmm15");
313 asm volatile("paddb %x 318 asm volatile("paddb %xmm4,%xmm4");
314 asm volatile("paddb %x 319 asm volatile("paddb %xmm6,%xmm6");
315 asm volatile("paddb %x 320 asm volatile("paddb %xmm12,%xmm12");
316 asm volatile("paddb %x 321 asm volatile("paddb %xmm14,%xmm14");
317 asm volatile("pand %xm 322 asm volatile("pand %xmm0,%xmm5");
318 asm volatile("pand %xm 323 asm volatile("pand %xmm0,%xmm7");
319 asm volatile("pand %xm 324 asm volatile("pand %xmm0,%xmm13");
320 asm volatile("pand %xm 325 asm volatile("pand %xmm0,%xmm15");
321 asm volatile("pxor %xm 326 asm volatile("pxor %xmm5,%xmm4");
322 asm volatile("pxor %xm 327 asm volatile("pxor %xmm7,%xmm6");
323 asm volatile("pxor %xm 328 asm volatile("pxor %xmm13,%xmm12");
324 asm volatile("pxor %xm 329 asm volatile("pxor %xmm15,%xmm14");
325 asm volatile("movdqa % 330 asm volatile("movdqa %0,%%xmm5" :: "m" (dptr[z][d]));
326 asm volatile("movdqa % 331 asm volatile("movdqa %0,%%xmm7" :: "m" (dptr[z][d+16]));
327 asm volatile("movdqa % 332 asm volatile("movdqa %0,%%xmm13" :: "m" (dptr[z][d+32]));
328 asm volatile("movdqa % 333 asm volatile("movdqa %0,%%xmm15" :: "m" (dptr[z][d+48]));
329 asm volatile("pxor %xm 334 asm volatile("pxor %xmm5,%xmm2");
330 asm volatile("pxor %xm 335 asm volatile("pxor %xmm7,%xmm3");
331 asm volatile("pxor %xm 336 asm volatile("pxor %xmm13,%xmm10");
332 asm volatile("pxor %xm 337 asm volatile("pxor %xmm15,%xmm11");
333 asm volatile("pxor %xm 338 asm volatile("pxor %xmm5,%xmm4");
334 asm volatile("pxor %xm 339 asm volatile("pxor %xmm7,%xmm6");
335 asm volatile("pxor %xm 340 asm volatile("pxor %xmm13,%xmm12");
336 asm volatile("pxor %xm 341 asm volatile("pxor %xmm15,%xmm14");
337 asm volatile("pxor %xm 342 asm volatile("pxor %xmm5,%xmm5");
338 asm volatile("pxor %xm 343 asm volatile("pxor %xmm7,%xmm7");
339 asm volatile("pxor %xm 344 asm volatile("pxor %xmm13,%xmm13");
340 asm volatile("pxor %xm 345 asm volatile("pxor %xmm15,%xmm15");
341 } 346 }
342 asm volatile("movntdq %%xmm2,% 347 asm volatile("movntdq %%xmm2,%0" : "=m" (p[d]));
343 asm volatile("pxor %xmm2,%xmm2 348 asm volatile("pxor %xmm2,%xmm2");
344 asm volatile("movntdq %%xmm3,% 349 asm volatile("movntdq %%xmm3,%0" : "=m" (p[d+16]));
345 asm volatile("pxor %xmm3,%xmm3 350 asm volatile("pxor %xmm3,%xmm3");
346 asm volatile("movntdq %%xmm10, 351 asm volatile("movntdq %%xmm10,%0" : "=m" (p[d+32]));
347 asm volatile("pxor %xmm10,%xmm 352 asm volatile("pxor %xmm10,%xmm10");
348 asm volatile("movntdq %%xmm11, 353 asm volatile("movntdq %%xmm11,%0" : "=m" (p[d+48]));
349 asm volatile("pxor %xmm11,%xmm 354 asm volatile("pxor %xmm11,%xmm11");
350 asm volatile("movntdq %%xmm4,% 355 asm volatile("movntdq %%xmm4,%0" : "=m" (q[d]));
351 asm volatile("pxor %xmm4,%xmm4 356 asm volatile("pxor %xmm4,%xmm4");
352 asm volatile("movntdq %%xmm6,% 357 asm volatile("movntdq %%xmm6,%0" : "=m" (q[d+16]));
353 asm volatile("pxor %xmm6,%xmm6 358 asm volatile("pxor %xmm6,%xmm6");
354 asm volatile("movntdq %%xmm12, 359 asm volatile("movntdq %%xmm12,%0" : "=m" (q[d+32]));
355 asm volatile("pxor %xmm12,%xmm 360 asm volatile("pxor %xmm12,%xmm12");
356 asm volatile("movntdq %%xmm14, 361 asm volatile("movntdq %%xmm14,%0" : "=m" (q[d+48]));
357 asm volatile("pxor %xmm14,%xmm 362 asm volatile("pxor %xmm14,%xmm14");
358 } 363 }
359 364
360 asm volatile("sfence" : : : "memory"); 365 asm volatile("sfence" : : : "memory");
361 kernel_fpu_end(); 366 kernel_fpu_end();
362 } 367 }
363 368
364 static void raid6_sse24_xor_syndrome(int disks 369 static void raid6_sse24_xor_syndrome(int disks, int start, int stop,
365 size_t by 370 size_t bytes, void **ptrs)
366 { 371 {
367 u8 **dptr = (u8 **)ptrs; 372 u8 **dptr = (u8 **)ptrs;
368 u8 *p, *q; 373 u8 *p, *q;
369 int d, z, z0; 374 int d, z, z0;
370 375
371 z0 = stop; /* P/Q right s 376 z0 = stop; /* P/Q right side optimization */
372 p = dptr[disks-2]; /* XOR parity 377 p = dptr[disks-2]; /* XOR parity */
373 q = dptr[disks-1]; /* RS syndrome 378 q = dptr[disks-1]; /* RS syndrome */
374 379
375 kernel_fpu_begin(); 380 kernel_fpu_begin();
376 381
377 asm volatile("movdqa %0,%%xmm0" :: "m" 382 asm volatile("movdqa %0,%%xmm0" :: "m" (raid6_sse_constants.x1d[0]));
378 383
379 for ( d = 0 ; d < bytes ; d += 64 ) { 384 for ( d = 0 ; d < bytes ; d += 64 ) {
380 asm volatile("movdqa %0,%%xmm4 385 asm volatile("movdqa %0,%%xmm4" :: "m" (dptr[z0][d]));
381 asm volatile("movdqa %0,%%xmm6 386 asm volatile("movdqa %0,%%xmm6" :: "m" (dptr[z0][d+16]));
382 asm volatile("movdqa %0,%%xmm1 387 asm volatile("movdqa %0,%%xmm12" :: "m" (dptr[z0][d+32]));
383 asm volatile("movdqa %0,%%xmm1 388 asm volatile("movdqa %0,%%xmm14" :: "m" (dptr[z0][d+48]));
384 asm volatile("movdqa %0,%%xmm2 389 asm volatile("movdqa %0,%%xmm2" : : "m" (p[d]));
385 asm volatile("movdqa %0,%%xmm3 390 asm volatile("movdqa %0,%%xmm3" : : "m" (p[d+16]));
386 asm volatile("movdqa %0,%%xmm1 391 asm volatile("movdqa %0,%%xmm10" : : "m" (p[d+32]));
387 asm volatile("movdqa %0,%%xmm1 392 asm volatile("movdqa %0,%%xmm11" : : "m" (p[d+48]));
388 asm volatile("pxor %xmm4,%xmm2 393 asm volatile("pxor %xmm4,%xmm2");
389 asm volatile("pxor %xmm6,%xmm3 394 asm volatile("pxor %xmm6,%xmm3");
390 asm volatile("pxor %xmm12,%xmm 395 asm volatile("pxor %xmm12,%xmm10");
391 asm volatile("pxor %xmm14,%xmm 396 asm volatile("pxor %xmm14,%xmm11");
392 /* P/Q data pages */ 397 /* P/Q data pages */
393 for ( z = z0-1 ; z >= start ; 398 for ( z = z0-1 ; z >= start ; z-- ) {
394 asm volatile("prefetch 399 asm volatile("prefetchnta %0" :: "m" (dptr[z][d]));
395 asm volatile("prefetch 400 asm volatile("prefetchnta %0" :: "m" (dptr[z][d+32]));
396 asm volatile("pxor %xm 401 asm volatile("pxor %xmm5,%xmm5");
397 asm volatile("pxor %xm 402 asm volatile("pxor %xmm7,%xmm7");
398 asm volatile("pxor %xm 403 asm volatile("pxor %xmm13,%xmm13");
399 asm volatile("pxor %xm 404 asm volatile("pxor %xmm15,%xmm15");
400 asm volatile("pcmpgtb 405 asm volatile("pcmpgtb %xmm4,%xmm5");
401 asm volatile("pcmpgtb 406 asm volatile("pcmpgtb %xmm6,%xmm7");
402 asm volatile("pcmpgtb 407 asm volatile("pcmpgtb %xmm12,%xmm13");
403 asm volatile("pcmpgtb 408 asm volatile("pcmpgtb %xmm14,%xmm15");
404 asm volatile("paddb %x 409 asm volatile("paddb %xmm4,%xmm4");
405 asm volatile("paddb %x 410 asm volatile("paddb %xmm6,%xmm6");
406 asm volatile("paddb %x 411 asm volatile("paddb %xmm12,%xmm12");
407 asm volatile("paddb %x 412 asm volatile("paddb %xmm14,%xmm14");
408 asm volatile("pand %xm 413 asm volatile("pand %xmm0,%xmm5");
409 asm volatile("pand %xm 414 asm volatile("pand %xmm0,%xmm7");
410 asm volatile("pand %xm 415 asm volatile("pand %xmm0,%xmm13");
411 asm volatile("pand %xm 416 asm volatile("pand %xmm0,%xmm15");
412 asm volatile("pxor %xm 417 asm volatile("pxor %xmm5,%xmm4");
413 asm volatile("pxor %xm 418 asm volatile("pxor %xmm7,%xmm6");
414 asm volatile("pxor %xm 419 asm volatile("pxor %xmm13,%xmm12");
415 asm volatile("pxor %xm 420 asm volatile("pxor %xmm15,%xmm14");
416 asm volatile("movdqa % 421 asm volatile("movdqa %0,%%xmm5" :: "m" (dptr[z][d]));
417 asm volatile("movdqa % 422 asm volatile("movdqa %0,%%xmm7" :: "m" (dptr[z][d+16]));
418 asm volatile("movdqa % 423 asm volatile("movdqa %0,%%xmm13" :: "m" (dptr[z][d+32]));
419 asm volatile("movdqa % 424 asm volatile("movdqa %0,%%xmm15" :: "m" (dptr[z][d+48]));
420 asm volatile("pxor %xm 425 asm volatile("pxor %xmm5,%xmm2");
421 asm volatile("pxor %xm 426 asm volatile("pxor %xmm7,%xmm3");
422 asm volatile("pxor %xm 427 asm volatile("pxor %xmm13,%xmm10");
423 asm volatile("pxor %xm 428 asm volatile("pxor %xmm15,%xmm11");
424 asm volatile("pxor %xm 429 asm volatile("pxor %xmm5,%xmm4");
425 asm volatile("pxor %xm 430 asm volatile("pxor %xmm7,%xmm6");
426 asm volatile("pxor %xm 431 asm volatile("pxor %xmm13,%xmm12");
427 asm volatile("pxor %xm 432 asm volatile("pxor %xmm15,%xmm14");
428 } 433 }
429 asm volatile("prefetchnta %0" 434 asm volatile("prefetchnta %0" :: "m" (q[d]));
430 asm volatile("prefetchnta %0" 435 asm volatile("prefetchnta %0" :: "m" (q[d+32]));
431 /* P/Q left side optimization 436 /* P/Q left side optimization */
432 for ( z = start-1 ; z >= 0 ; z 437 for ( z = start-1 ; z >= 0 ; z-- ) {
433 asm volatile("pxor %xm 438 asm volatile("pxor %xmm5,%xmm5");
434 asm volatile("pxor %xm 439 asm volatile("pxor %xmm7,%xmm7");
435 asm volatile("pxor %xm 440 asm volatile("pxor %xmm13,%xmm13");
436 asm volatile("pxor %xm 441 asm volatile("pxor %xmm15,%xmm15");
437 asm volatile("pcmpgtb 442 asm volatile("pcmpgtb %xmm4,%xmm5");
438 asm volatile("pcmpgtb 443 asm volatile("pcmpgtb %xmm6,%xmm7");
439 asm volatile("pcmpgtb 444 asm volatile("pcmpgtb %xmm12,%xmm13");
440 asm volatile("pcmpgtb 445 asm volatile("pcmpgtb %xmm14,%xmm15");
441 asm volatile("paddb %x 446 asm volatile("paddb %xmm4,%xmm4");
442 asm volatile("paddb %x 447 asm volatile("paddb %xmm6,%xmm6");
443 asm volatile("paddb %x 448 asm volatile("paddb %xmm12,%xmm12");
444 asm volatile("paddb %x 449 asm volatile("paddb %xmm14,%xmm14");
445 asm volatile("pand %xm 450 asm volatile("pand %xmm0,%xmm5");
446 asm volatile("pand %xm 451 asm volatile("pand %xmm0,%xmm7");
447 asm volatile("pand %xm 452 asm volatile("pand %xmm0,%xmm13");
448 asm volatile("pand %xm 453 asm volatile("pand %xmm0,%xmm15");
449 asm volatile("pxor %xm 454 asm volatile("pxor %xmm5,%xmm4");
450 asm volatile("pxor %xm 455 asm volatile("pxor %xmm7,%xmm6");
451 asm volatile("pxor %xm 456 asm volatile("pxor %xmm13,%xmm12");
452 asm volatile("pxor %xm 457 asm volatile("pxor %xmm15,%xmm14");
453 } 458 }
454 asm volatile("movntdq %%xmm2,% 459 asm volatile("movntdq %%xmm2,%0" : "=m" (p[d]));
455 asm volatile("movntdq %%xmm3,% 460 asm volatile("movntdq %%xmm3,%0" : "=m" (p[d+16]));
456 asm volatile("movntdq %%xmm10, 461 asm volatile("movntdq %%xmm10,%0" : "=m" (p[d+32]));
457 asm volatile("movntdq %%xmm11, 462 asm volatile("movntdq %%xmm11,%0" : "=m" (p[d+48]));
458 asm volatile("pxor %0,%%xmm4" 463 asm volatile("pxor %0,%%xmm4" : : "m" (q[d]));
459 asm volatile("pxor %0,%%xmm6" 464 asm volatile("pxor %0,%%xmm6" : : "m" (q[d+16]));
460 asm volatile("pxor %0,%%xmm12" 465 asm volatile("pxor %0,%%xmm12" : : "m" (q[d+32]));
461 asm volatile("pxor %0,%%xmm14" 466 asm volatile("pxor %0,%%xmm14" : : "m" (q[d+48]));
462 asm volatile("movntdq %%xmm4,% 467 asm volatile("movntdq %%xmm4,%0" : "=m" (q[d]));
463 asm volatile("movntdq %%xmm6,% 468 asm volatile("movntdq %%xmm6,%0" : "=m" (q[d+16]));
464 asm volatile("movntdq %%xmm12, 469 asm volatile("movntdq %%xmm12,%0" : "=m" (q[d+32]));
465 asm volatile("movntdq %%xmm14, 470 asm volatile("movntdq %%xmm14,%0" : "=m" (q[d+48]));
466 } 471 }
467 asm volatile("sfence" : : : "memory"); 472 asm volatile("sfence" : : : "memory");
468 kernel_fpu_end(); 473 kernel_fpu_end();
469 } 474 }
470 475
471 476
472 const struct raid6_calls raid6_sse2x4 = { 477 const struct raid6_calls raid6_sse2x4 = {
473 raid6_sse24_gen_syndrome, 478 raid6_sse24_gen_syndrome,
474 raid6_sse24_xor_syndrome, 479 raid6_sse24_xor_syndrome,
475 raid6_have_sse2, 480 raid6_have_sse2,
476 "sse2x4", 481 "sse2x4",
477 1 /* Has cache h 482 1 /* Has cache hints */
478 }; 483 };
479 484
480 #endif /* CONFIG_X86_64 */ 485 #endif /* CONFIG_X86_64 */
481 486
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