drivers/net/ethernet/sfc/bitfield.h

   1 /****************************************************************************
   2  * Driver for Solarflare Solarstorm network controllers and boards
   3  * Copyright 2005-2006 Fen Systems Ltd.
   4  * Copyright 2006-2009 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 #define EFX_QWORD_0_LBN 0
  41 #define EFX_QWORD_0_WIDTH 64
  42
  43 /* Specified attribute (e.g. LBN) of the specified field */
  44 #define EFX_VAL(field, attribute) field ## _ ## attribute
  45 /* Low bit number of the specified field */
  46 #define EFX_LOW_BIT(field) EFX_VAL(field, LBN)
  47 /* Bit width of the specified field */
  48 #define EFX_WIDTH(field) EFX_VAL(field, WIDTH)
  49 /* High bit number of the specified field */
  50 #define EFX_HIGH_BIT(field) (EFX_LOW_BIT(field) + EFX_WIDTH(field) - 1)
  51 /* Mask equal in width to the specified field.
  52  *
  53  * For example, a field with width 5 would have a mask of 0x1f.
  54  *
  55  * The maximum width mask that can be generated is 64 bits.
  56  */
  57 #define EFX_MASK64(width)                       \
  58         ((width) == 64 ? ~((u64) 0) :           \
  59          (((((u64) 1) << (width))) - 1))
  60
  61 /* Mask equal in width to the specified field.
  62  *
  63  * For example, a field with width 5 would have a mask of 0x1f.
  64  *
  65  * The maximum width mask that can be generated is 32 bits.  Use
  66  * EFX_MASK64 for higher width fields.
  67  */
  68 #define EFX_MASK32(width)                       \
  69         ((width) == 32 ? ~((u32) 0) :           \
  70          (((((u32) 1) << (width))) - 1))
  71
  72 /* A doubleword (i.e. 4 byte) datatype - little-endian in HW */
  73 typedef union efx_dword {
  74         __le32 u32[1];
  75 } efx_dword_t;
  76
  77 /* A quadword (i.e. 8 byte) datatype - little-endian in HW */
  78 typedef union efx_qword {
  79         __le64 u64[1];
  80         __le32 u32[2];
  81         efx_dword_t dword[2];
  82 } efx_qword_t;
  83
  84 /* An octword (eight-word, i.e. 16 byte) datatype - little-endian in HW */
  85 typedef union efx_oword {
  86         __le64 u64[2];
  87         efx_qword_t qword[2];
  88         __le32 u32[4];
  89         efx_dword_t dword[4];
  90 } efx_oword_t;
  91
  92 /* Format string and value expanders for printk */
  93 #define EFX_DWORD_FMT "%08x"
  94 #define EFX_QWORD_FMT "%08x:%08x"
  95 #define EFX_OWORD_FMT "%08x:%08x:%08x:%08x"
  96 #define EFX_DWORD_VAL(dword)                            \
  97         ((unsigned int) le32_to_cpu((dword).u32[0]))
  98 #define EFX_QWORD_VAL(qword)                            \
  99         ((unsigned int) le32_to_cpu((qword).u32[1])),   \
 100         ((unsigned int) le32_to_cpu((qword).u32[0]))
 101 #define EFX_OWORD_VAL(oword)                            \
 102         ((unsigned int) le32_to_cpu((oword).u32[3])),   \
 103         ((unsigned int) le32_to_cpu((oword).u32[2])),   \
 104         ((unsigned int) le32_to_cpu((oword).u32[1])),   \
 105         ((unsigned int) le32_to_cpu((oword).u32[0]))
 106
 107 /*
 108  * Extract bit field portion [low,high) from the native-endian element
 109  * which contains bits [min,max).
 110  *
 111  * For example, suppose "element" represents the high 32 bits of a
 112  * 64-bit value, and we wish to extract the bits belonging to the bit
 113  * field occupying bits 28-45 of this 64-bit value.
 114  *
 115  * Then EFX_EXTRACT ( element, 32, 63, 28, 45 ) would give
 116  *
 117  *   ( element ) << 4
 118  *
 119  * The result will contain the relevant bits filled in in the range
 120  * [0,high-low), with garbage in bits [high-low+1,...).
 121  */
 122 #define EFX_EXTRACT_NATIVE(native_element, min, max, low, high)         \
 123         (((low > max) || (high < min)) ? 0 :                            \
 124          ((low > min) ?                                                 \
 125           ((native_element) >> (low - min)) :                           \
 126           ((native_element) << (min - low))))
 127
 128 /*
 129  * Extract bit field portion [low,high) from the 64-bit little-endian
 130  * element which contains bits [min,max)
 131  */
 132 #define EFX_EXTRACT64(element, min, max, low, high)                     \
 133         EFX_EXTRACT_NATIVE(le64_to_cpu(element), min, max, low, high)
 134
 135 /*
 136  * Extract bit field portion [low,high) from the 32-bit little-endian
 137  * element which contains bits [min,max)
 138  */
 139 #define EFX_EXTRACT32(element, min, max, low, high)                     \
 140         EFX_EXTRACT_NATIVE(le32_to_cpu(element), min, max, low, high)
 141
 142 #define EFX_EXTRACT_OWORD64(oword, low, high)                           \
 143         ((EFX_EXTRACT64((oword).u64[0], 0, 63, low, high) |             \
 144           EFX_EXTRACT64((oword).u64[1], 64, 127, low, high)) &          \
 145          EFX_MASK64(high + 1 - low))
 146
 147 #define EFX_EXTRACT_QWORD64(qword, low, high)                           \
 148         (EFX_EXTRACT64((qword).u64[0], 0, 63, low, high) &              \
 149          EFX_MASK64(high + 1 - low))
 150
 151 #define EFX_EXTRACT_OWORD32(oword, low, high)                           \
 152         ((EFX_EXTRACT32((oword).u32[0], 0, 31, low, high) |             \
 153           EFX_EXTRACT32((oword).u32[1], 32, 63, low, high) |            \
 154           EFX_EXTRACT32((oword).u32[2], 64, 95, low, high) |            \
 155           EFX_EXTRACT32((oword).u32[3], 96, 127, low, high)) &          \
 156          EFX_MASK32(high + 1 - low))
 157
 158 #define EFX_EXTRACT_QWORD32(qword, low, high)                           \
 159         ((EFX_EXTRACT32((qword).u32[0], 0, 31, low, high) |             \
 160           EFX_EXTRACT32((qword).u32[1], 32, 63, low, high)) &           \
 161          EFX_MASK32(high + 1 - low))
 162
 163 #define EFX_EXTRACT_DWORD(dword, low, high)                     \
 164         (EFX_EXTRACT32((dword).u32[0], 0, 31, low, high) &      \
 165          EFX_MASK32(high + 1 - low))
 166
 167 #define EFX_OWORD_FIELD64(oword, field)                         \
 168         EFX_EXTRACT_OWORD64(oword, EFX_LOW_BIT(field),          \
 169                             EFX_HIGH_BIT(field))
 170
 171 #define EFX_QWORD_FIELD64(qword, field)                         \
 172         EFX_EXTRACT_QWORD64(qword, EFX_LOW_BIT(field),          \
 173                             EFX_HIGH_BIT(field))
 174
 175 #define EFX_OWORD_FIELD32(oword, field)                         \
 176         EFX_EXTRACT_OWORD32(oword, EFX_LOW_BIT(field),          \
 177                             EFX_HIGH_BIT(field))
 178
 179 #define EFX_QWORD_FIELD32(qword, field)                         \
 180         EFX_EXTRACT_QWORD32(qword, EFX_LOW_BIT(field),          \
 181                             EFX_HIGH_BIT(field))
 182
 183 #define EFX_DWORD_FIELD(dword, field)                           \
 184         EFX_EXTRACT_DWORD(dword, EFX_LOW_BIT(field),            \
 185                           EFX_HIGH_BIT(field))
 186
 187 #define EFX_OWORD_IS_ZERO64(oword)                                      \
 188         (((oword).u64[0] | (oword).u64[1]) == (__force __le64) 0)
 189
 190 #define EFX_QWORD_IS_ZERO64(qword)                                      \
 191         (((qword).u64[0]) == (__force __le64) 0)
 192
 193 #define EFX_OWORD_IS_ZERO32(oword)                                           \
 194         (((oword).u32[0] | (oword).u32[1] | (oword).u32[2] | (oword).u32[3]) \
 195          == (__force __le32) 0)
 196
 197 #define EFX_QWORD_IS_ZERO32(qword)                                      \
 198         (((qword).u32[0] | (qword).u32[1]) == (__force __le32) 0)
 199
 200 #define EFX_DWORD_IS_ZERO(dword)                                        \
 201         (((dword).u32[0]) == (__force __le32) 0)
 202
 203 #define EFX_OWORD_IS_ALL_ONES64(oword)                                  \
 204         (((oword).u64[0] & (oword).u64[1]) == ~((__force __le64) 0))
 205
 206 #define EFX_QWORD_IS_ALL_ONES64(qword)                                  \
 207         ((qword).u64[0] == ~((__force __le64) 0))
 208
 209 #define EFX_OWORD_IS_ALL_ONES32(oword)                                  \
 210         (((oword).u32[0] & (oword).u32[1] & (oword).u32[2] & (oword).u32[3]) \
 211          == ~((__force __le32) 0))
 212
 213 #define EFX_QWORD_IS_ALL_ONES32(qword)                                  \
 214         (((qword).u32[0] & (qword).u32[1]) == ~((__force __le32) 0))
 215
 216 #define EFX_DWORD_IS_ALL_ONES(dword)                                    \
 217         ((dword).u32[0] == ~((__force __le32) 0))
 218
 219 #if BITS_PER_LONG == 64
 220 #define EFX_OWORD_FIELD         EFX_OWORD_FIELD64
 221 #define EFX_QWORD_FIELD         EFX_QWORD_FIELD64
 222 #define EFX_OWORD_IS_ZERO       EFX_OWORD_IS_ZERO64
 223 #define EFX_QWORD_IS_ZERO       EFX_QWORD_IS_ZERO64
 224 #define EFX_OWORD_IS_ALL_ONES   EFX_OWORD_IS_ALL_ONES64
 225 #define EFX_QWORD_IS_ALL_ONES   EFX_QWORD_IS_ALL_ONES64
 226 #else
 227 #define EFX_OWORD_FIELD         EFX_OWORD_FIELD32
 228 #define EFX_QWORD_FIELD         EFX_QWORD_FIELD32
 229 #define EFX_OWORD_IS_ZERO       EFX_OWORD_IS_ZERO32
 230 #define EFX_QWORD_IS_ZERO       EFX_QWORD_IS_ZERO32
 231 #define EFX_OWORD_IS_ALL_ONES   EFX_OWORD_IS_ALL_ONES32
 232 #define EFX_QWORD_IS_ALL_ONES   EFX_QWORD_IS_ALL_ONES32
 233 #endif
 234
 235 /*
 236  * Construct bit field portion
 237  *
 238  * Creates the portion of the bit field [low,high) that lies within
 239  * the range [min,max).
 240  */
 241 #define EFX_INSERT_NATIVE64(min, max, low, high, value)         \
 242         (((low > max) || (high < min)) ? 0 :                    \
 243          ((low > min) ?                                         \
 244           (((u64) (value)) << (low - min)) :            \
 245           (((u64) (value)) >> (min - low))))
 246
 247 #define EFX_INSERT_NATIVE32(min, max, low, high, value)         \
 248         (((low > max) || (high < min)) ? 0 :                    \
 249          ((low > min) ?                                         \
 250           (((u32) (value)) << (low - min)) :            \
 251           (((u32) (value)) >> (min - low))))
 252
 253 #define EFX_INSERT_NATIVE(min, max, low, high, value)           \
 254         ((((max - min) >= 32) || ((high - low) >= 32)) ?        \
 255          EFX_INSERT_NATIVE64(min, max, low, high, value) :      \
 256          EFX_INSERT_NATIVE32(min, max, low, high, value))
 257
 258 /*
 259  * Construct bit field portion
 260  *
 261  * Creates the portion of the named bit field that lies within the
 262  * range [min,max).
 263  */
 264 #define EFX_INSERT_FIELD_NATIVE(min, max, field, value)         \
 265         EFX_INSERT_NATIVE(min, max, EFX_LOW_BIT(field),         \
 266                           EFX_HIGH_BIT(field), value)
 267
 268 /*
 269  * Construct bit field
 270  *
 271  * Creates the portion of the named bit fields that lie within the
 272  * range [min,max).
 273  */
 274 #define EFX_INSERT_FIELDS_NATIVE(min, max,                              \
 275                                  field1, value1,                        \
 276                                  field2, value2,                        \
 277                                  field3, value3,                        \
 278                                  field4, value4,                        \
 279                                  field5, value5,                        \
 280                                  field6, value6,                        \
 281                                  field7, value7,                        \
 282                                  field8, value8,                        \
 283                                  field9, value9,                        \
 284                                  field10, value10)                      \
 285         (EFX_INSERT_FIELD_NATIVE((min), (max), field1, (value1)) |      \
 286          EFX_INSERT_FIELD_NATIVE((min), (max), field2, (value2)) |      \
 287          EFX_INSERT_FIELD_NATIVE((min), (max), field3, (value3)) |      \
 288          EFX_INSERT_FIELD_NATIVE((min), (max), field4, (value4)) |      \
 289          EFX_INSERT_FIELD_NATIVE((min), (max), field5, (value5)) |      \
 290          EFX_INSERT_FIELD_NATIVE((min), (max), field6, (value6)) |      \
 291          EFX_INSERT_FIELD_NATIVE((min), (max), field7, (value7)) |      \
 292          EFX_INSERT_FIELD_NATIVE((min), (max), field8, (value8)) |      \
 293          EFX_INSERT_FIELD_NATIVE((min), (max), field9, (value9)) |      \
 294          EFX_INSERT_FIELD_NATIVE((min), (max), field10, (value10)))
 295
 296 #define EFX_INSERT_FIELDS64(...)                                \
 297         cpu_to_le64(EFX_INSERT_FIELDS_NATIVE(__VA_ARGS__))
 298
 299 #define EFX_INSERT_FIELDS32(...)                                \
 300         cpu_to_le32(EFX_INSERT_FIELDS_NATIVE(__VA_ARGS__))
 301
 302 #define EFX_POPULATE_OWORD64(oword, ...) do {                           \
 303         (oword).u64[0] = EFX_INSERT_FIELDS64(0, 63, __VA_ARGS__);       \
 304         (oword).u64[1] = EFX_INSERT_FIELDS64(64, 127, __VA_ARGS__);     \
 305         } while (0)
 306
 307 #define EFX_POPULATE_QWORD64(qword, ...) do {                           \
 308         (qword).u64[0] = EFX_INSERT_FIELDS64(0, 63, __VA_ARGS__);       \
 309         } while (0)
 310
 311 #define EFX_POPULATE_OWORD32(oword, ...) do {                           \
 312         (oword).u32[0] = EFX_INSERT_FIELDS32(0, 31, __VA_ARGS__);       \
 313         (oword).u32[1] = EFX_INSERT_FIELDS32(32, 63, __VA_ARGS__);      \
 314         (oword).u32[2] = EFX_INSERT_FIELDS32(64, 95, __VA_ARGS__);      \
 315         (oword).u32[3] = EFX_INSERT_FIELDS32(96, 127, __VA_ARGS__);     \
 316         } while (0)
 317
 318 #define EFX_POPULATE_QWORD32(qword, ...) do {                           \
 319         (qword).u32[0] = EFX_INSERT_FIELDS32(0, 31, __VA_ARGS__);       \
 320         (qword).u32[1] = EFX_INSERT_FIELDS32(32, 63, __VA_ARGS__);      \
 321         } while (0)
 322
 323 #define EFX_POPULATE_DWORD(dword, ...) do {                             \
 324         (dword).u32[0] = EFX_INSERT_FIELDS32(0, 31, __VA_ARGS__);       \
 325         } while (0)
 326
 327 #if BITS_PER_LONG == 64
 328 #define EFX_POPULATE_OWORD EFX_POPULATE_OWORD64
 329 #define EFX_POPULATE_QWORD EFX_POPULATE_QWORD64
 330 #else
 331 #define EFX_POPULATE_OWORD EFX_POPULATE_OWORD32
 332 #define EFX_POPULATE_QWORD EFX_POPULATE_QWORD32
 333 #endif
 334
 335 /* Populate an octword field with various numbers of arguments */
 336 #define EFX_POPULATE_OWORD_10 EFX_POPULATE_OWORD
 337 #define EFX_POPULATE_OWORD_9(oword, ...) \
 338         EFX_POPULATE_OWORD_10(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 339 #define EFX_POPULATE_OWORD_8(oword, ...) \
 340         EFX_POPULATE_OWORD_9(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 341 #define EFX_POPULATE_OWORD_7(oword, ...) \
 342         EFX_POPULATE_OWORD_8(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 343 #define EFX_POPULATE_OWORD_6(oword, ...) \
 344         EFX_POPULATE_OWORD_7(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 345 #define EFX_POPULATE_OWORD_5(oword, ...) \
 346         EFX_POPULATE_OWORD_6(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 347 #define EFX_POPULATE_OWORD_4(oword, ...) \
 348         EFX_POPULATE_OWORD_5(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 349 #define EFX_POPULATE_OWORD_3(oword, ...) \
 350         EFX_POPULATE_OWORD_4(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 351 #define EFX_POPULATE_OWORD_2(oword, ...) \
 352         EFX_POPULATE_OWORD_3(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 353 #define EFX_POPULATE_OWORD_1(oword, ...) \
 354         EFX_POPULATE_OWORD_2(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 355 #define EFX_ZERO_OWORD(oword) \
 356         EFX_POPULATE_OWORD_1(oword, EFX_DUMMY_FIELD, 0)
 357 #define EFX_SET_OWORD(oword) \
 358         EFX_POPULATE_OWORD_4(oword, \
 359                              EFX_DWORD_0, 0xffffffff, \
 360                              EFX_DWORD_1, 0xffffffff, \
 361                              EFX_DWORD_2, 0xffffffff, \
 362                              EFX_DWORD_3, 0xffffffff)
 363
 364 /* Populate a quadword field with various numbers of arguments */
 365 #define EFX_POPULATE_QWORD_10 EFX_POPULATE_QWORD
 366 #define EFX_POPULATE_QWORD_9(qword, ...) \
 367         EFX_POPULATE_QWORD_10(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 368 #define EFX_POPULATE_QWORD_8(qword, ...) \
 369         EFX_POPULATE_QWORD_9(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 370 #define EFX_POPULATE_QWORD_7(qword, ...) \
 371         EFX_POPULATE_QWORD_8(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 372 #define EFX_POPULATE_QWORD_6(qword, ...) \
 373         EFX_POPULATE_QWORD_7(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 374 #define EFX_POPULATE_QWORD_5(qword, ...) \
 375         EFX_POPULATE_QWORD_6(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 376 #define EFX_POPULATE_QWORD_4(qword, ...) \
 377         EFX_POPULATE_QWORD_5(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 378 #define EFX_POPULATE_QWORD_3(qword, ...) \
 379         EFX_POPULATE_QWORD_4(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 380 #define EFX_POPULATE_QWORD_2(qword, ...) \
 381         EFX_POPULATE_QWORD_3(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 382 #define EFX_POPULATE_QWORD_1(qword, ...) \
 383         EFX_POPULATE_QWORD_2(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 384 #define EFX_ZERO_QWORD(qword) \
 385         EFX_POPULATE_QWORD_1(qword, EFX_DUMMY_FIELD, 0)
 386 #define EFX_SET_QWORD(qword) \
 387         EFX_POPULATE_QWORD_2(qword, \
 388                              EFX_DWORD_0, 0xffffffff, \
 389                              EFX_DWORD_1, 0xffffffff)
 390
 391 /* Populate a dword field with various numbers of arguments */
 392 #define EFX_POPULATE_DWORD_10 EFX_POPULATE_DWORD
 393 #define EFX_POPULATE_DWORD_9(dword, ...) \
 394         EFX_POPULATE_DWORD_10(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 395 #define EFX_POPULATE_DWORD_8(dword, ...) \
 396         EFX_POPULATE_DWORD_9(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 397 #define EFX_POPULATE_DWORD_7(dword, ...) \
 398         EFX_POPULATE_DWORD_8(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 399 #define EFX_POPULATE_DWORD_6(dword, ...) \
 400         EFX_POPULATE_DWORD_7(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 401 #define EFX_POPULATE_DWORD_5(dword, ...) \
 402         EFX_POPULATE_DWORD_6(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 403 #define EFX_POPULATE_DWORD_4(dword, ...) \
 404         EFX_POPULATE_DWORD_5(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 405 #define EFX_POPULATE_DWORD_3(dword, ...) \
 406         EFX_POPULATE_DWORD_4(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 407 #define EFX_POPULATE_DWORD_2(dword, ...) \
 408         EFX_POPULATE_DWORD_3(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 409 #define EFX_POPULATE_DWORD_1(dword, ...) \
 410         EFX_POPULATE_DWORD_2(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 411 #define EFX_ZERO_DWORD(dword) \
 412         EFX_POPULATE_DWORD_1(dword, EFX_DUMMY_FIELD, 0)
 413 #define EFX_SET_DWORD(dword) \
 414         EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0, 0xffffffff)
 415
 416 /*
 417  * Modify a named field within an already-populated structure.  Used
 418  * for read-modify-write operations.
 419  *
 420  */
 421 #define EFX_INVERT_OWORD(oword) do {            \
 422         (oword).u64[0] = ~((oword).u64[0]);     \
 423         (oword).u64[1] = ~((oword).u64[1]);     \
 424         } while (0)
 425
 426 #define EFX_AND_OWORD(oword, from, mask)                        \
 427         do {                                                    \
 428                 (oword).u64[0] = (from).u64[0] & (mask).u64[0]; \
 429                 (oword).u64[1] = (from).u64[1] & (mask).u64[1]; \
 430         } while (0)
 431
 432 #define EFX_OR_OWORD(oword, from, mask)                         \
 433         do {                                                    \
 434                 (oword).u64[0] = (from).u64[0] | (mask).u64[0]; \
 435                 (oword).u64[1] = (from).u64[1] | (mask).u64[1]; \
 436         } while (0)
 437
 438 #define EFX_INSERT64(min, max, low, high, value)                        \
 439         cpu_to_le64(EFX_INSERT_NATIVE(min, max, low, high, value))
 440
 441 #define EFX_INSERT32(min, max, low, high, value)                        \
 442         cpu_to_le32(EFX_INSERT_NATIVE(min, max, low, high, value))
 443
 444 #define EFX_INPLACE_MASK64(min, max, low, high)                         \
 445         EFX_INSERT64(min, max, low, high, EFX_MASK64(high + 1 - low))
 446
 447 #define EFX_INPLACE_MASK32(min, max, low, high)                         \
 448         EFX_INSERT32(min, max, low, high, EFX_MASK32(high + 1 - low))
 449
 450 #define EFX_SET_OWORD64(oword, low, high, value) do {                   \
 451         (oword).u64[0] = (((oword).u64[0]                               \
 452                            & ~EFX_INPLACE_MASK64(0,  63, low, high))    \
 453                           | EFX_INSERT64(0,  63, low, high, value));    \
 454         (oword).u64[1] = (((oword).u64[1]                               \
 455                            & ~EFX_INPLACE_MASK64(64, 127, low, high))   \
 456                           | EFX_INSERT64(64, 127, low, high, value));   \
 457         } while (0)
 458
 459 #define EFX_SET_QWORD64(qword, low, high, value) do {                   \
 460         (qword).u64[0] = (((qword).u64[0]                               \
 461                            & ~EFX_INPLACE_MASK64(0, 63, low, high))     \
 462                           | EFX_INSERT64(0, 63, low, high, value));     \
 463         } while (0)
 464
 465 #define EFX_SET_OWORD32(oword, low, high, value) do {                   \
 466         (oword).u32[0] = (((oword).u32[0]                               \
 467                            & ~EFX_INPLACE_MASK32(0, 31, low, high))     \
 468                           | EFX_INSERT32(0, 31, low, high, value));     \
 469         (oword).u32[1] = (((oword).u32[1]                               \
 470                            & ~EFX_INPLACE_MASK32(32, 63, low, high))    \
 471                           | EFX_INSERT32(32, 63, low, high, value));    \
 472         (oword).u32[2] = (((oword).u32[2]                               \
 473                            & ~EFX_INPLACE_MASK32(64, 95, low, high))    \
 474                           | EFX_INSERT32(64, 95, low, high, value));    \
 475         (oword).u32[3] = (((oword).u32[3]                               \
 476                            & ~EFX_INPLACE_MASK32(96, 127, low, high))   \
 477                           | EFX_INSERT32(96, 127, low, high, value));   \
 478         } while (0)
 479
 480 #define EFX_SET_QWORD32(qword, low, high, value) do {                   \
 481         (qword).u32[0] = (((qword).u32[0]                               \
 482                            & ~EFX_INPLACE_MASK32(0, 31, low, high))     \
 483                           | EFX_INSERT32(0, 31, low, high, value));     \
 484         (qword).u32[1] = (((qword).u32[1]                               \
 485                            & ~EFX_INPLACE_MASK32(32, 63, low, high))    \
 486                           | EFX_INSERT32(32, 63, low, high, value));    \
 487         } while (0)
 488
 489 #define EFX_SET_DWORD32(dword, low, high, value) do {                   \
 490         (dword).u32[0] = (((dword).u32[0]                               \
 491                            & ~EFX_INPLACE_MASK32(0, 31, low, high))     \
 492                           | EFX_INSERT32(0, 31, low, high, value));     \
 493         } while (0)
 494
 495 #define EFX_SET_OWORD_FIELD64(oword, field, value)                      \
 496         EFX_SET_OWORD64(oword, EFX_LOW_BIT(field),                      \
 497                          EFX_HIGH_BIT(field), value)
 498
 499 #define EFX_SET_QWORD_FIELD64(qword, field, value)                      \
 500         EFX_SET_QWORD64(qword, EFX_LOW_BIT(field),                      \
 501                          EFX_HIGH_BIT(field), value)
 502
 503 #define EFX_SET_OWORD_FIELD32(oword, field, value)                      \
 504         EFX_SET_OWORD32(oword, EFX_LOW_BIT(field),                      \
 505                          EFX_HIGH_BIT(field), value)
 506
 507 #define EFX_SET_QWORD_FIELD32(qword, field, value)                      \
 508         EFX_SET_QWORD32(qword, EFX_LOW_BIT(field),                      \
 509                          EFX_HIGH_BIT(field), value)
 510
 511 #define EFX_SET_DWORD_FIELD(dword, field, value)                        \
 512         EFX_SET_DWORD32(dword, EFX_LOW_BIT(field),                      \
 513                          EFX_HIGH_BIT(field), value)
 514
 515
 516
 517 #if BITS_PER_LONG == 64
 518 #define EFX_SET_OWORD_FIELD EFX_SET_OWORD_FIELD64
 519 #define EFX_SET_QWORD_FIELD EFX_SET_QWORD_FIELD64
 520 #else
 521 #define EFX_SET_OWORD_FIELD EFX_SET_OWORD_FIELD32
 522 #define EFX_SET_QWORD_FIELD EFX_SET_QWORD_FIELD32
 523 #endif
 524
 525 /* Used to avoid compiler warnings about shift range exceeding width
 526  * of the data types when dma_addr_t is only 32 bits wide.
 527  */
 528 #define DMA_ADDR_T_WIDTH        (8 * sizeof(dma_addr_t))
 529 #define EFX_DMA_TYPE_WIDTH(width) \
 530         (((width) < DMA_ADDR_T_WIDTH) ? (width) : DMA_ADDR_T_WIDTH)
 531
 532
 533 /* Static initialiser */
 534 #define EFX_OWORD32(a, b, c, d)                                         \
 535         { .u32 = { cpu_to_le32(a), cpu_to_le32(b), \
 536                    cpu_to_le32(c), cpu_to_le32(d) } }
 537
 538 #endif /* EFX_BITFIELD_H */