drivers/net/sfc/bitfield.h

   1 /****************************************************************************
   2  * Driver for Solarflare Solarstorm network controllers and boards
   3  * Copyright 2005-2006 Fen Systems Ltd.
   4  * Copyright 2006-2008 Solarflare Communications Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation, incorporated herein by reference.
   9  */
  10
  11 #ifndef EFX_BITFIELD_H
  12 #define EFX_BITFIELD_H
  13
  14 /*
  15  * Efx bitfield access
  16  *
  17  * Efx NICs make extensive use of bitfields up to 128 bits
  18  * wide.  Since there is no native 128-bit datatype on most systems,
  19  * and since 64-bit datatypes are inefficient on 32-bit systems and
  20  * vice versa, we wrap accesses in a way that uses the most efficient
  21  * datatype.
  22  *
  23  * The NICs are PCI devices and therefore little-endian.  Since most
  24  * of the quantities that we deal with are DMAed to/from host memory,
  25  * we define our datatypes (efx_oword_t, efx_qword_t and
  26  * efx_dword_t) to be little-endian.
  27  */
  28
  29 /* Lowest bit numbers and widths */
  30 #define EFX_DUMMY_FIELD_LBN 0
  31 #define EFX_DUMMY_FIELD_WIDTH 0
  32 #define EFX_DWORD_0_LBN 0
  33 #define EFX_DWORD_0_WIDTH 32
  34 #define EFX_DWORD_1_LBN 32
  35 #define EFX_DWORD_1_WIDTH 32
  36 #define EFX_DWORD_2_LBN 64
  37 #define EFX_DWORD_2_WIDTH 32
  38 #define EFX_DWORD_3_LBN 96
  39 #define EFX_DWORD_3_WIDTH 32
  40
  41 /* Specified attribute (e.g. LBN) of the specified field */
  42 #define EFX_VAL(field, attribute) field ## _ ## attribute
  43 /* Low bit number of the specified field */
  44 #define EFX_LOW_BIT(field) EFX_VAL(field, LBN)
  45 /* Bit width of the specified field */
  46 #define EFX_WIDTH(field) EFX_VAL(field, WIDTH)
  47 /* High bit number of the specified field */
  48 #define EFX_HIGH_BIT(field) (EFX_LOW_BIT(field) + EFX_WIDTH(field) - 1)
  49 /* Mask equal in width to the specified field.
  50  *
  51  * For example, a field with width 5 would have a mask of 0x1f.
  52  *
  53  * The maximum width mask that can be generated is 64 bits.
  54  */
  55 #define EFX_MASK64(width)                       \
  56         ((width) == 64 ? ~((u64) 0) :           \
  57          (((((u64) 1) << (width))) - 1))
  58
  59 /* Mask equal in width to the specified field.
  60  *
  61  * For example, a field with width 5 would have a mask of 0x1f.
  62  *
  63  * The maximum width mask that can be generated is 32 bits.  Use
  64  * EFX_MASK64 for higher width fields.
  65  */
  66 #define EFX_MASK32(width)                       \
  67         ((width) == 32 ? ~((u32) 0) :           \
  68          (((((u32) 1) << (width))) - 1))
  69
  70 /* A doubleword (i.e. 4 byte) datatype - little-endian in HW */
  71 typedef union efx_dword {
  72         __le32 u32[1];
  73 } efx_dword_t;
  74
  75 /* A quadword (i.e. 8 byte) datatype - little-endian in HW */
  76 typedef union efx_qword {
  77         __le64 u64[1];
  78         __le32 u32[2];
  79         efx_dword_t dword[2];
  80 } efx_qword_t;
  81
  82 /* An octword (eight-word, i.e. 16 byte) datatype - little-endian in HW */
  83 typedef union efx_oword {
  84         __le64 u64[2];
  85         efx_qword_t qword[2];
  86         __le32 u32[4];
  87         efx_dword_t dword[4];
  88 } efx_oword_t;
  89
  90 /* Format string and value expanders for printk */
  91 #define EFX_DWORD_FMT "%08x"
  92 #define EFX_QWORD_FMT "%08x:%08x"
  93 #define EFX_OWORD_FMT "%08x:%08x:%08x:%08x"
  94 #define EFX_DWORD_VAL(dword)                            \
  95         ((unsigned int) le32_to_cpu((dword).u32[0]))
  96 #define EFX_QWORD_VAL(qword)                            \
  97         ((unsigned int) le32_to_cpu((qword).u32[1])),   \
  98         ((unsigned int) le32_to_cpu((qword).u32[0]))
  99 #define EFX_OWORD_VAL(oword)                            \
 100         ((unsigned int) le32_to_cpu((oword).u32[3])),   \
 101         ((unsigned int) le32_to_cpu((oword).u32[2])),   \
 102         ((unsigned int) le32_to_cpu((oword).u32[1])),   \
 103         ((unsigned int) le32_to_cpu((oword).u32[0]))
 104
 105 /*
 106  * Extract bit field portion [low,high) from the native-endian element
 107  * which contains bits [min,max).
 108  *
 109  * For example, suppose "element" represents the high 32 bits of a
 110  * 64-bit value, and we wish to extract the bits belonging to the bit
 111  * field occupying bits 28-45 of this 64-bit value.
 112  *
 113  * Then EFX_EXTRACT ( element, 32, 63, 28, 45 ) would give
 114  *
 115  *   ( element ) << 4
 116  *
 117  * The result will contain the relevant bits filled in in the range
 118  * [0,high-low), with garbage in bits [high-low+1,...).
 119  */
 120 #define EFX_EXTRACT_NATIVE(native_element, min, max, low, high)         \
 121         (((low > max) || (high < min)) ? 0 :                            \
 122          ((low > min) ?                                                 \
 123           ((native_element) >> (low - min)) :                           \
 124           ((native_element) << (min - low))))
 125
 126 /*
 127  * Extract bit field portion [low,high) from the 64-bit little-endian
 128  * element which contains bits [min,max)
 129  */
 130 #define EFX_EXTRACT64(element, min, max, low, high)                     \
 131         EFX_EXTRACT_NATIVE(le64_to_cpu(element), min, max, low, high)
 132
 133 /*
 134  * Extract bit field portion [low,high) from the 32-bit little-endian
 135  * element which contains bits [min,max)
 136  */
 137 #define EFX_EXTRACT32(element, min, max, low, high)                     \
 138         EFX_EXTRACT_NATIVE(le32_to_cpu(element), min, max, low, high)
 139
 140 #define EFX_EXTRACT_OWORD64(oword, low, high)                           \
 141         ((EFX_EXTRACT64((oword).u64[0], 0, 63, low, high) |             \
 142           EFX_EXTRACT64((oword).u64[1], 64, 127, low, high)) &          \
 143          EFX_MASK64(high + 1 - low))
 144
 145 #define EFX_EXTRACT_QWORD64(qword, low, high)                           \
 146         (EFX_EXTRACT64((qword).u64[0], 0, 63, low, high) &              \
 147          EFX_MASK64(high + 1 - low))
 148
 149 #define EFX_EXTRACT_OWORD32(oword, low, high)                           \
 150         ((EFX_EXTRACT32((oword).u32[0], 0, 31, low, high) |             \
 151           EFX_EXTRACT32((oword).u32[1], 32, 63, low, high) |            \
 152           EFX_EXTRACT32((oword).u32[2], 64, 95, low, high) |            \
 153           EFX_EXTRACT32((oword).u32[3], 96, 127, low, high)) &          \
 154          EFX_MASK32(high + 1 - low))
 155
 156 #define EFX_EXTRACT_QWORD32(qword, low, high)                           \
 157         ((EFX_EXTRACT32((qword).u32[0], 0, 31, low, high) |             \
 158           EFX_EXTRACT32((qword).u32[1], 32, 63, low, high)) &           \
 159          EFX_MASK32(high + 1 - low))
 160
 161 #define EFX_EXTRACT_DWORD(dword, low, high)                     \
 162         (EFX_EXTRACT32((dword).u32[0], 0, 31, low, high) &      \
 163          EFX_MASK32(high + 1 - low))
 164
 165 #define EFX_OWORD_FIELD64(oword, field)                         \
 166         EFX_EXTRACT_OWORD64(oword, EFX_LOW_BIT(field),          \
 167                             EFX_HIGH_BIT(field))
 168
 169 #define EFX_QWORD_FIELD64(qword, field)                         \
 170         EFX_EXTRACT_QWORD64(qword, EFX_LOW_BIT(field),          \
 171                             EFX_HIGH_BIT(field))
 172
 173 #define EFX_OWORD_FIELD32(oword, field)                         \
 174         EFX_EXTRACT_OWORD32(oword, EFX_LOW_BIT(field),          \
 175                             EFX_HIGH_BIT(field))
 176
 177 #define EFX_QWORD_FIELD32(qword, field)                         \
 178         EFX_EXTRACT_QWORD32(qword, EFX_LOW_BIT(field),          \
 179                             EFX_HIGH_BIT(field))
 180
 181 #define EFX_DWORD_FIELD(dword, field)                           \
 182         EFX_EXTRACT_DWORD(dword, EFX_LOW_BIT(field),            \
 183                           EFX_HIGH_BIT(field))
 184
 185 #define EFX_OWORD_IS_ZERO64(oword)                                      \
 186         (((oword).u64[0] | (oword).u64[1]) == (__force __le64) 0)
 187
 188 #define EFX_QWORD_IS_ZERO64(qword)                                      \
 189         (((qword).u64[0]) == (__force __le64) 0)
 190
 191 #define EFX_OWORD_IS_ZERO32(oword)                                           \
 192         (((oword).u32[0] | (oword).u32[1] | (oword).u32[2] | (oword).u32[3]) \
 193          == (__force __le32) 0)
 194
 195 #define EFX_QWORD_IS_ZERO32(qword)                                      \
 196         (((qword).u32[0] | (qword).u32[1]) == (__force __le32) 0)
 197
 198 #define EFX_DWORD_IS_ZERO(dword)                                        \
 199         (((dword).u32[0]) == (__force __le32) 0)
 200
 201 #define EFX_OWORD_IS_ALL_ONES64(oword)                                  \
 202         (((oword).u64[0] & (oword).u64[1]) == ~((__force __le64) 0))
 203
 204 #define EFX_QWORD_IS_ALL_ONES64(qword)                                  \
 205         ((qword).u64[0] == ~((__force __le64) 0))
 206
 207 #define EFX_OWORD_IS_ALL_ONES32(oword)                                  \
 208         (((oword).u32[0] & (oword).u32[1] & (oword).u32[2] & (oword).u32[3]) \
 209          == ~((__force __le32) 0))
 210
 211 #define EFX_QWORD_IS_ALL_ONES32(qword)                                  \
 212         (((qword).u32[0] & (qword).u32[1]) == ~((__force __le32) 0))
 213
 214 #define EFX_DWORD_IS_ALL_ONES(dword)                                    \
 215         ((dword).u32[0] == ~((__force __le32) 0))
 216
 217 #if BITS_PER_LONG == 64
 218 #define EFX_OWORD_FIELD         EFX_OWORD_FIELD64
 219 #define EFX_QWORD_FIELD         EFX_QWORD_FIELD64
 220 #define EFX_OWORD_IS_ZERO       EFX_OWORD_IS_ZERO64
 221 #define EFX_QWORD_IS_ZERO       EFX_QWORD_IS_ZERO64
 222 #define EFX_OWORD_IS_ALL_ONES   EFX_OWORD_IS_ALL_ONES64
 223 #define EFX_QWORD_IS_ALL_ONES   EFX_QWORD_IS_ALL_ONES64
 224 #else
 225 #define EFX_OWORD_FIELD         EFX_OWORD_FIELD32
 226 #define EFX_QWORD_FIELD         EFX_QWORD_FIELD32
 227 #define EFX_OWORD_IS_ZERO       EFX_OWORD_IS_ZERO32
 228 #define EFX_QWORD_IS_ZERO       EFX_QWORD_IS_ZERO32
 229 #define EFX_OWORD_IS_ALL_ONES   EFX_OWORD_IS_ALL_ONES32
 230 #define EFX_QWORD_IS_ALL_ONES   EFX_QWORD_IS_ALL_ONES32
 231 #endif
 232
 233 /*
 234  * Construct bit field portion
 235  *
 236  * Creates the portion of the bit field [low,high) that lies within
 237  * the range [min,max).
 238  */
 239 #define EFX_INSERT_NATIVE64(min, max, low, high, value)         \
 240         (((low > max) || (high < min)) ? 0 :                    \
 241          ((low > min) ?                                         \
 242           (((u64) (value)) << (low - min)) :            \
 243           (((u64) (value)) >> (min - low))))
 244
 245 #define EFX_INSERT_NATIVE32(min, max, low, high, value)         \
 246         (((low > max) || (high < min)) ? 0 :                    \
 247          ((low > min) ?                                         \
 248           (((u32) (value)) << (low - min)) :            \
 249           (((u32) (value)) >> (min - low))))
 250
 251 #define EFX_INSERT_NATIVE(min, max, low, high, value)           \
 252         ((((max - min) >= 32) || ((high - low) >= 32)) ?        \
 253          EFX_INSERT_NATIVE64(min, max, low, high, value) :      \
 254          EFX_INSERT_NATIVE32(min, max, low, high, value))
 255
 256 /*
 257  * Construct bit field portion
 258  *
 259  * Creates the portion of the named bit field that lies within the
 260  * range [min,max).
 261  */
 262 #define EFX_INSERT_FIELD_NATIVE(min, max, field, value)         \
 263         EFX_INSERT_NATIVE(min, max, EFX_LOW_BIT(field),         \
 264                           EFX_HIGH_BIT(field), value)
 265
 266 /*
 267  * Construct bit field
 268  *
 269  * Creates the portion of the named bit fields that lie within the
 270  * range [min,max).
 271  */
 272 #define EFX_INSERT_FIELDS_NATIVE(min, max,                              \
 273                                  field1, value1,                        \
 274                                  field2, value2,                        \
 275                                  field3, value3,                        \
 276                                  field4, value4,                        \
 277                                  field5, value5,                        \
 278                                  field6, value6,                        \
 279                                  field7, value7,                        \
 280                                  field8, value8,                        \
 281                                  field9, value9,                        \
 282                                  field10, value10)                      \
 283         (EFX_INSERT_FIELD_NATIVE((min), (max), field1, (value1)) |      \
 284          EFX_INSERT_FIELD_NATIVE((min), (max), field2, (value2)) |      \
 285          EFX_INSERT_FIELD_NATIVE((min), (max), field3, (value3)) |      \
 286          EFX_INSERT_FIELD_NATIVE((min), (max), field4, (value4)) |      \
 287          EFX_INSERT_FIELD_NATIVE((min), (max), field5, (value5)) |      \
 288          EFX_INSERT_FIELD_NATIVE((min), (max), field6, (value6)) |      \
 289          EFX_INSERT_FIELD_NATIVE((min), (max), field7, (value7)) |      \
 290          EFX_INSERT_FIELD_NATIVE((min), (max), field8, (value8)) |      \
 291          EFX_INSERT_FIELD_NATIVE((min), (max), field9, (value9)) |      \
 292          EFX_INSERT_FIELD_NATIVE((min), (max), field10, (value10)))
 293
 294 #define EFX_INSERT_FIELDS64(...)                                \
 295         cpu_to_le64(EFX_INSERT_FIELDS_NATIVE(__VA_ARGS__))
 296
 297 #define EFX_INSERT_FIELDS32(...)                                \
 298         cpu_to_le32(EFX_INSERT_FIELDS_NATIVE(__VA_ARGS__))
 299
 300 #define EFX_POPULATE_OWORD64(oword, ...) do {                           \
 301         (oword).u64[0] = EFX_INSERT_FIELDS64(0, 63, __VA_ARGS__);       \
 302         (oword).u64[1] = EFX_INSERT_FIELDS64(64, 127, __VA_ARGS__);     \
 303         } while (0)
 304
 305 #define EFX_POPULATE_QWORD64(qword, ...) do {                           \
 306         (qword).u64[0] = EFX_INSERT_FIELDS64(0, 63, __VA_ARGS__);       \
 307         } while (0)
 308
 309 #define EFX_POPULATE_OWORD32(oword, ...) do {                           \
 310         (oword).u32[0] = EFX_INSERT_FIELDS32(0, 31, __VA_ARGS__);       \
 311         (oword).u32[1] = EFX_INSERT_FIELDS32(32, 63, __VA_ARGS__);      \
 312         (oword).u32[2] = EFX_INSERT_FIELDS32(64, 95, __VA_ARGS__);      \
 313         (oword).u32[3] = EFX_INSERT_FIELDS32(96, 127, __VA_ARGS__);     \
 314         } while (0)
 315
 316 #define EFX_POPULATE_QWORD32(qword, ...) do {                           \
 317         (qword).u32[0] = EFX_INSERT_FIELDS32(0, 31, __VA_ARGS__);       \
 318         (qword).u32[1] = EFX_INSERT_FIELDS32(32, 63, __VA_ARGS__);      \
 319         } while (0)
 320
 321 #define EFX_POPULATE_DWORD(dword, ...) do {                             \
 322         (dword).u32[0] = EFX_INSERT_FIELDS32(0, 31, __VA_ARGS__);       \
 323         } while (0)
 324
 325 #if BITS_PER_LONG == 64
 326 #define EFX_POPULATE_OWORD EFX_POPULATE_OWORD64
 327 #define EFX_POPULATE_QWORD EFX_POPULATE_QWORD64
 328 #else
 329 #define EFX_POPULATE_OWORD EFX_POPULATE_OWORD32
 330 #define EFX_POPULATE_QWORD EFX_POPULATE_QWORD32
 331 #endif
 332
 333 /* Populate an octword field with various numbers of arguments */
 334 #define EFX_POPULATE_OWORD_10 EFX_POPULATE_OWORD
 335 #define EFX_POPULATE_OWORD_9(oword, ...) \
 336         EFX_POPULATE_OWORD_10(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 337 #define EFX_POPULATE_OWORD_8(oword, ...) \
 338         EFX_POPULATE_OWORD_9(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 339 #define EFX_POPULATE_OWORD_7(oword, ...) \
 340         EFX_POPULATE_OWORD_8(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 341 #define EFX_POPULATE_OWORD_6(oword, ...) \
 342         EFX_POPULATE_OWORD_7(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 343 #define EFX_POPULATE_OWORD_5(oword, ...) \
 344         EFX_POPULATE_OWORD_6(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 345 #define EFX_POPULATE_OWORD_4(oword, ...) \
 346         EFX_POPULATE_OWORD_5(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 347 #define EFX_POPULATE_OWORD_3(oword, ...) \
 348         EFX_POPULATE_OWORD_4(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 349 #define EFX_POPULATE_OWORD_2(oword, ...) \
 350         EFX_POPULATE_OWORD_3(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 351 #define EFX_POPULATE_OWORD_1(oword, ...) \
 352         EFX_POPULATE_OWORD_2(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 353 #define EFX_ZERO_OWORD(oword) \
 354         EFX_POPULATE_OWORD_1(oword, EFX_DUMMY_FIELD, 0)
 355 #define EFX_SET_OWORD(oword) \
 356         EFX_POPULATE_OWORD_4(oword, \
 357                              EFX_DWORD_0, 0xffffffff, \
 358                              EFX_DWORD_1, 0xffffffff, \
 359                              EFX_DWORD_2, 0xffffffff, \
 360                              EFX_DWORD_3, 0xffffffff)
 361
 362 /* Populate a quadword field with various numbers of arguments */
 363 #define EFX_POPULATE_QWORD_10 EFX_POPULATE_QWORD
 364 #define EFX_POPULATE_QWORD_9(qword, ...) \
 365         EFX_POPULATE_QWORD_10(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 366 #define EFX_POPULATE_QWORD_8(qword, ...) \
 367         EFX_POPULATE_QWORD_9(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 368 #define EFX_POPULATE_QWORD_7(qword, ...) \
 369         EFX_POPULATE_QWORD_8(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 370 #define EFX_POPULATE_QWORD_6(qword, ...) \
 371         EFX_POPULATE_QWORD_7(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 372 #define EFX_POPULATE_QWORD_5(qword, ...) \
 373         EFX_POPULATE_QWORD_6(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 374 #define EFX_POPULATE_QWORD_4(qword, ...) \
 375         EFX_POPULATE_QWORD_5(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 376 #define EFX_POPULATE_QWORD_3(qword, ...) \
 377         EFX_POPULATE_QWORD_4(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 378 #define EFX_POPULATE_QWORD_2(qword, ...) \
 379         EFX_POPULATE_QWORD_3(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 380 #define EFX_POPULATE_QWORD_1(qword, ...) \
 381         EFX_POPULATE_QWORD_2(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 382 #define EFX_ZERO_QWORD(qword) \
 383         EFX_POPULATE_QWORD_1(qword, EFX_DUMMY_FIELD, 0)
 384 #define EFX_SET_QWORD(qword) \
 385         EFX_POPULATE_QWORD_2(qword, \
 386                              EFX_DWORD_0, 0xffffffff, \
 387                              EFX_DWORD_1, 0xffffffff)
 388
 389 /* Populate a dword field with various numbers of arguments */
 390 #define EFX_POPULATE_DWORD_10 EFX_POPULATE_DWORD
 391 #define EFX_POPULATE_DWORD_9(dword, ...) \
 392         EFX_POPULATE_DWORD_10(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 393 #define EFX_POPULATE_DWORD_8(dword, ...) \
 394         EFX_POPULATE_DWORD_9(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 395 #define EFX_POPULATE_DWORD_7(dword, ...) \
 396         EFX_POPULATE_DWORD_8(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 397 #define EFX_POPULATE_DWORD_6(dword, ...) \
 398         EFX_POPULATE_DWORD_7(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 399 #define EFX_POPULATE_DWORD_5(dword, ...) \
 400         EFX_POPULATE_DWORD_6(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 401 #define EFX_POPULATE_DWORD_4(dword, ...) \
 402         EFX_POPULATE_DWORD_5(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 403 #define EFX_POPULATE_DWORD_3(dword, ...) \
 404         EFX_POPULATE_DWORD_4(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 405 #define EFX_POPULATE_DWORD_2(dword, ...) \
 406         EFX_POPULATE_DWORD_3(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 407 #define EFX_POPULATE_DWORD_1(dword, ...) \
 408         EFX_POPULATE_DWORD_2(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 409 #define EFX_ZERO_DWORD(dword) \
 410         EFX_POPULATE_DWORD_1(dword, EFX_DUMMY_FIELD, 0)
 411 #define EFX_SET_DWORD(dword) \
 412         EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0, 0xffffffff)
 413
 414 /*
 415  * Modify a named field within an already-populated structure.  Used
 416  * for read-modify-write operations.
 417  *
 418  */
 419 #define EFX_INVERT_OWORD(oword) do {            \
 420         (oword).u64[0] = ~((oword).u64[0]);     \
 421         (oword).u64[1] = ~((oword).u64[1]);     \
 422         } while (0)
 423
 424 #define EFX_AND_OWORD(oword, from, mask)                        \
 425         do {                                                    \
 426                 (oword).u64[0] = (from).u64[0] & (mask).u64[0]; \
 427                 (oword).u64[1] = (from).u64[1] & (mask).u64[1]; \
 428         } while (0)
 429
 430 #define EFX_OR_OWORD(oword, from, mask)                         \
 431         do {                                                    \
 432                 (oword).u64[0] = (from).u64[0] | (mask).u64[0]; \
 433                 (oword).u64[1] = (from).u64[1] | (mask).u64[1]; \
 434         } while (0)
 435
 436 #define EFX_INSERT64(min, max, low, high, value)                        \
 437         cpu_to_le64(EFX_INSERT_NATIVE(min, max, low, high, value))
 438
 439 #define EFX_INSERT32(min, max, low, high, value)                        \
 440         cpu_to_le32(EFX_INSERT_NATIVE(min, max, low, high, value))
 441
 442 #define EFX_INPLACE_MASK64(min, max, low, high)                         \
 443         EFX_INSERT64(min, max, low, high, EFX_MASK64(high + 1 - low))
 444
 445 #define EFX_INPLACE_MASK32(min, max, low, high)                         \
 446         EFX_INSERT32(min, max, low, high, EFX_MASK32(high + 1 - low))
 447
 448 #define EFX_SET_OWORD64(oword, low, high, value) do {                   \
 449         (oword).u64[0] = (((oword).u64[0]                               \
 450                            & ~EFX_INPLACE_MASK64(0,  63, low, high))    \
 451                           | EFX_INSERT64(0,  63, low, high, value));    \
 452         (oword).u64[1] = (((oword).u64[1]                               \
 453                            & ~EFX_INPLACE_MASK64(64, 127, low, high))   \
 454                           | EFX_INSERT64(64, 127, low, high, value));   \
 455         } while (0)
 456
 457 #define EFX_SET_QWORD64(qword, low, high, value) do {                   \
 458         (qword).u64[0] = (((qword).u64[0]                               \
 459                            & ~EFX_INPLACE_MASK64(0, 63, low, high))     \
 460                           | EFX_INSERT64(0, 63, low, high, value));     \
 461         } while (0)
 462
 463 #define EFX_SET_OWORD32(oword, low, high, value) do {                   \
 464         (oword).u32[0] = (((oword).u32[0]                               \
 465                            & ~EFX_INPLACE_MASK32(0, 31, low, high))     \
 466                           | EFX_INSERT32(0, 31, low, high, value));     \
 467         (oword).u32[1] = (((oword).u32[1]                               \
 468                            & ~EFX_INPLACE_MASK32(32, 63, low, high))    \
 469                           | EFX_INSERT32(32, 63, low, high, value));    \
 470         (oword).u32[2] = (((oword).u32[2]                               \
 471                            & ~EFX_INPLACE_MASK32(64, 95, low, high))    \
 472                           | EFX_INSERT32(64, 95, low, high, value));    \
 473         (oword).u32[3] = (((oword).u32[3]                               \
 474                            & ~EFX_INPLACE_MASK32(96, 127, low, high))   \
 475                           | EFX_INSERT32(96, 127, low, high, value));   \
 476         } while (0)
 477
 478 #define EFX_SET_QWORD32(qword, low, high, value) do {                   \
 479         (qword).u32[0] = (((qword).u32[0]                               \
 480                            & ~EFX_INPLACE_MASK32(0, 31, low, high))     \
 481                           | EFX_INSERT32(0, 31, low, high, value));     \
 482         (qword).u32[1] = (((qword).u32[1]                               \
 483                            & ~EFX_INPLACE_MASK32(32, 63, low, high))    \
 484                           | EFX_INSERT32(32, 63, low, high, value));    \
 485         } while (0)
 486
 487 #define EFX_SET_DWORD32(dword, low, high, value) do {                   \
 488         (dword).u32[0] = (((dword).u32[0]                               \
 489                            & ~EFX_INPLACE_MASK32(0, 31, low, high))     \
 490                           | EFX_INSERT32(0, 31, low, high, value));     \
 491         } while (0)
 492
 493 #define EFX_SET_OWORD_FIELD64(oword, field, value)                      \
 494         EFX_SET_OWORD64(oword, EFX_LOW_BIT(field),                      \
 495                          EFX_HIGH_BIT(field), value)
 496
 497 #define EFX_SET_QWORD_FIELD64(qword, field, value)                      \
 498         EFX_SET_QWORD64(qword, EFX_LOW_BIT(field),                      \
 499                          EFX_HIGH_BIT(field), value)
 500
 501 #define EFX_SET_OWORD_FIELD32(oword, field, value)                      \
 502         EFX_SET_OWORD32(oword, EFX_LOW_BIT(field),                      \
 503                          EFX_HIGH_BIT(field), value)
 504
 505 #define EFX_SET_QWORD_FIELD32(qword, field, value)                      \
 506         EFX_SET_QWORD32(qword, EFX_LOW_BIT(field),                      \
 507                          EFX_HIGH_BIT(field), value)
 508
 509 #define EFX_SET_DWORD_FIELD(dword, field, value)                        \
 510         EFX_SET_DWORD32(dword, EFX_LOW_BIT(field),                      \
 511                          EFX_HIGH_BIT(field), value)
 512
 513
 514
 515 #if BITS_PER_LONG == 64
 516 #define EFX_SET_OWORD_FIELD EFX_SET_OWORD_FIELD64
 517 #define EFX_SET_QWORD_FIELD EFX_SET_QWORD_FIELD64
 518 #else
 519 #define EFX_SET_OWORD_FIELD EFX_SET_OWORD_FIELD32
 520 #define EFX_SET_QWORD_FIELD EFX_SET_QWORD_FIELD32
 521 #endif
 522
 523 #define EFX_SET_OWORD_FIELD_VER(efx, oword, field, value) do { \
 524         if (falcon_rev(efx) >= FALCON_REV_B0) {                    \
 525                 EFX_SET_OWORD_FIELD((oword), field##_B0, (value)); \
 526         } else { \
 527                 EFX_SET_OWORD_FIELD((oword), field##_A1, (value)); \
 528         } \
 529 } while (0)
 530
 531 #define EFX_QWORD_FIELD_VER(efx, qword, field)  \
 532         (falcon_rev(efx) >= FALCON_REV_B0 ?     \
 533          EFX_QWORD_FIELD((qword), field##_B0) : \
 534          EFX_QWORD_FIELD((qword), field##_A1))
 535
 536 /* Used to avoid compiler warnings about shift range exceeding width
 537  * of the data types when dma_addr_t is only 32 bits wide.
 538  */
 539 #define DMA_ADDR_T_WIDTH        (8 * sizeof(dma_addr_t))
 540 #define EFX_DMA_TYPE_WIDTH(width) \
 541         (((width) < DMA_ADDR_T_WIDTH) ? (width) : DMA_ADDR_T_WIDTH)
 542
 543
 544 /* Static initialiser */
 545 #define EFX_OWORD32(a, b, c, d)                                         \
 546         { .u32 = { cpu_to_le32(a), cpu_to_le32(b), \
 547                    cpu_to_le32(c), cpu_to_le32(d) } }
 548
 549 #endif /* EFX_BITFIELD_H */