drivers/net/ethernet/sfc/bitfield.h

/* [<][>][^][v][top][bottom][index][help] */
   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /****************************************************************************
   3  * Driver for Solarflare network controllers and boards
   4  * Copyright 2005-2006 Fen Systems Ltd.
   5  * Copyright 2006-2013 Solarflare Communications Inc.
   6  */
   7 
   8 #ifndef EFX_BITFIELD_H
   9 #define EFX_BITFIELD_H
  10 
  11 /*
  12  * Efx bitfield access
  13  *
  14  * Efx NICs make extensive use of bitfields up to 128 bits
  15  * wide.  Since there is no native 128-bit datatype on most systems,
  16  * and since 64-bit datatypes are inefficient on 32-bit systems and
  17  * vice versa, we wrap accesses in a way that uses the most efficient
  18  * datatype.
  19  *
  20  * The NICs are PCI devices and therefore little-endian.  Since most
  21  * of the quantities that we deal with are DMAed to/from host memory,
  22  * we define our datatypes (efx_oword_t, efx_qword_t and
  23  * efx_dword_t) to be little-endian.
  24  */
  25 
  26 /* Lowest bit numbers and widths */
  27 #define EFX_DUMMY_FIELD_LBN 0
  28 #define EFX_DUMMY_FIELD_WIDTH 0
  29 #define EFX_WORD_0_LBN 0
  30 #define EFX_WORD_0_WIDTH 16
  31 #define EFX_WORD_1_LBN 16
  32 #define EFX_WORD_1_WIDTH 16
  33 #define EFX_DWORD_0_LBN 0
  34 #define EFX_DWORD_0_WIDTH 32
  35 #define EFX_DWORD_1_LBN 32
  36 #define EFX_DWORD_1_WIDTH 32
  37 #define EFX_DWORD_2_LBN 64
  38 #define EFX_DWORD_2_WIDTH 32
  39 #define EFX_DWORD_3_LBN 96
  40 #define EFX_DWORD_3_WIDTH 32
  41 #define EFX_QWORD_0_LBN 0
  42 #define EFX_QWORD_0_WIDTH 64
  43 
  44 /* Specified attribute (e.g. LBN) of the specified field */
  45 #define EFX_VAL(field, attribute) field ## _ ## attribute
  46 /* Low bit number of the specified field */
  47 #define EFX_LOW_BIT(field) EFX_VAL(field, LBN)
  48 /* Bit width of the specified field */
  49 #define EFX_WIDTH(field) EFX_VAL(field, WIDTH)
  50 /* High bit number of the specified field */
  51 #define EFX_HIGH_BIT(field) (EFX_LOW_BIT(field) + EFX_WIDTH(field) - 1)
  52 /* Mask equal in width to the specified field.
  53  *
  54  * For example, a field with width 5 would have a mask of 0x1f.
  55  *
  56  * The maximum width mask that can be generated is 64 bits.
  57  */
  58 #define EFX_MASK64(width)                       \
  59         ((width) == 64 ? ~((u64) 0) :           \
  60          (((((u64) 1) << (width))) - 1))
  61 
  62 /* Mask equal in width to the specified field.
  63  *
  64  * For example, a field with width 5 would have a mask of 0x1f.
  65  *
  66  * The maximum width mask that can be generated is 32 bits.  Use
  67  * EFX_MASK64 for higher width fields.
  68  */
  69 #define EFX_MASK32(width)                       \
  70         ((width) == 32 ? ~((u32) 0) :           \
  71          (((((u32) 1) << (width))) - 1))
  72 
  73 /* A doubleword (i.e. 4 byte) datatype - little-endian in HW */
  74 typedef union efx_dword {
  75         __le32 u32[1];
  76 } efx_dword_t;
  77 
  78 /* A quadword (i.e. 8 byte) datatype - little-endian in HW */
  79 typedef union efx_qword {
  80         __le64 u64[1];
  81         __le32 u32[2];
  82         efx_dword_t dword[2];
  83 } efx_qword_t;
  84 
  85 /* An octword (eight-word, i.e. 16 byte) datatype - little-endian in HW */
  86 typedef union efx_oword {
  87         __le64 u64[2];
  88         efx_qword_t qword[2];
  89         __le32 u32[4];
  90         efx_dword_t dword[4];
  91 } efx_oword_t;
  92 
  93 /* Format string and value expanders for printk */
  94 #define EFX_DWORD_FMT "%08x"
  95 #define EFX_QWORD_FMT "%08x:%08x"
  96 #define EFX_OWORD_FMT "%08x:%08x:%08x:%08x"
  97 #define EFX_DWORD_VAL(dword)                            \
  98         ((unsigned int) le32_to_cpu((dword).u32[0]))
  99 #define EFX_QWORD_VAL(qword)                            \
 100         ((unsigned int) le32_to_cpu((qword).u32[1])),   \
 101         ((unsigned int) le32_to_cpu((qword).u32[0]))
 102 #define EFX_OWORD_VAL(oword)                            \
 103         ((unsigned int) le32_to_cpu((oword).u32[3])),   \
 104         ((unsigned int) le32_to_cpu((oword).u32[2])),   \
 105         ((unsigned int) le32_to_cpu((oword).u32[1])),   \
 106         ((unsigned int) le32_to_cpu((oword).u32[0]))
 107 
 108 /*
 109  * Extract bit field portion [low,high) from the native-endian element
 110  * which contains bits [min,max).
 111  *
 112  * For example, suppose "element" represents the high 32 bits of a
 113  * 64-bit value, and we wish to extract the bits belonging to the bit
 114  * field occupying bits 28-45 of this 64-bit value.
 115  *
 116  * Then EFX_EXTRACT ( element, 32, 63, 28, 45 ) would give
 117  *
 118  *   ( element ) << 4
 119  *
 120  * The result will contain the relevant bits filled in in the range
 121  * [0,high-low), with garbage in bits [high-low+1,...).
 122  */
 123 #define EFX_EXTRACT_NATIVE(native_element, min, max, low, high)         \
 124         ((low) > (max) || (high) < (min) ? 0 :                          \
 125          (low) > (min) ?                                                \
 126          (native_element) >> ((low) - (min)) :                          \
 127          (native_element) << ((min) - (low)))
 128 
 129 /*
 130  * Extract bit field portion [low,high) from the 64-bit little-endian
 131  * element which contains bits [min,max)
 132  */
 133 #define EFX_EXTRACT64(element, min, max, low, high)                     \
 134         EFX_EXTRACT_NATIVE(le64_to_cpu(element), min, max, low, high)
 135 
 136 /*
 137  * Extract bit field portion [low,high) from the 32-bit little-endian
 138  * element which contains bits [min,max)
 139  */
 140 #define EFX_EXTRACT32(element, min, max, low, high)                     \
 141         EFX_EXTRACT_NATIVE(le32_to_cpu(element), min, max, low, high)
 142 
 143 #define EFX_EXTRACT_OWORD64(oword, low, high)                           \
 144         ((EFX_EXTRACT64((oword).u64[0], 0, 63, low, high) |             \
 145           EFX_EXTRACT64((oword).u64[1], 64, 127, low, high)) &          \
 146          EFX_MASK64((high) + 1 - (low)))
 147 
 148 #define EFX_EXTRACT_QWORD64(qword, low, high)                           \
 149         (EFX_EXTRACT64((qword).u64[0], 0, 63, low, high) &              \
 150          EFX_MASK64((high) + 1 - (low)))
 151 
 152 #define EFX_EXTRACT_OWORD32(oword, low, high)                           \
 153         ((EFX_EXTRACT32((oword).u32[0], 0, 31, low, high) |             \
 154           EFX_EXTRACT32((oword).u32[1], 32, 63, low, high) |            \
 155           EFX_EXTRACT32((oword).u32[2], 64, 95, low, high) |            \
 156           EFX_EXTRACT32((oword).u32[3], 96, 127, low, high)) &          \
 157          EFX_MASK32((high) + 1 - (low)))
 158 
 159 #define EFX_EXTRACT_QWORD32(qword, low, high)                           \
 160         ((EFX_EXTRACT32((qword).u32[0], 0, 31, low, high) |             \
 161           EFX_EXTRACT32((qword).u32[1], 32, 63, low, high)) &           \
 162          EFX_MASK32((high) + 1 - (low)))
 163 
 164 #define EFX_EXTRACT_DWORD(dword, low, high)                     \
 165         (EFX_EXTRACT32((dword).u32[0], 0, 31, low, high) &      \
 166          EFX_MASK32((high) + 1 - (low)))
 167 
 168 #define EFX_OWORD_FIELD64(oword, field)                         \
 169         EFX_EXTRACT_OWORD64(oword, EFX_LOW_BIT(field),          \
 170                             EFX_HIGH_BIT(field))
 171 
 172 #define EFX_QWORD_FIELD64(qword, field)                         \
 173         EFX_EXTRACT_QWORD64(qword, EFX_LOW_BIT(field),          \
 174                             EFX_HIGH_BIT(field))
 175 
 176 #define EFX_OWORD_FIELD32(oword, field)                         \
 177         EFX_EXTRACT_OWORD32(oword, EFX_LOW_BIT(field),          \
 178                             EFX_HIGH_BIT(field))
 179 
 180 #define EFX_QWORD_FIELD32(qword, field)                         \
 181         EFX_EXTRACT_QWORD32(qword, EFX_LOW_BIT(field),          \
 182                             EFX_HIGH_BIT(field))
 183 
 184 #define EFX_DWORD_FIELD(dword, field)                           \
 185         EFX_EXTRACT_DWORD(dword, EFX_LOW_BIT(field),            \
 186                           EFX_HIGH_BIT(field))
 187 
 188 #define EFX_OWORD_IS_ZERO64(oword)                                      \
 189         (((oword).u64[0] | (oword).u64[1]) == (__force __le64) 0)
 190 
 191 #define EFX_QWORD_IS_ZERO64(qword)                                      \
 192         (((qword).u64[0]) == (__force __le64) 0)
 193 
 194 #define EFX_OWORD_IS_ZERO32(oword)                                           \
 195         (((oword).u32[0] | (oword).u32[1] | (oword).u32[2] | (oword).u32[3]) \
 196          == (__force __le32) 0)
 197 
 198 #define EFX_QWORD_IS_ZERO32(qword)                                      \
 199         (((qword).u32[0] | (qword).u32[1]) == (__force __le32) 0)
 200 
 201 #define EFX_DWORD_IS_ZERO(dword)                                        \
 202         (((dword).u32[0]) == (__force __le32) 0)
 203 
 204 #define EFX_OWORD_IS_ALL_ONES64(oword)                                  \
 205         (((oword).u64[0] & (oword).u64[1]) == ~((__force __le64) 0))
 206 
 207 #define EFX_QWORD_IS_ALL_ONES64(qword)                                  \
 208         ((qword).u64[0] == ~((__force __le64) 0))
 209 
 210 #define EFX_OWORD_IS_ALL_ONES32(oword)                                  \
 211         (((oword).u32[0] & (oword).u32[1] & (oword).u32[2] & (oword).u32[3]) \
 212          == ~((__force __le32) 0))
 213 
 214 #define EFX_QWORD_IS_ALL_ONES32(qword)                                  \
 215         (((qword).u32[0] & (qword).u32[1]) == ~((__force __le32) 0))
 216 
 217 #define EFX_DWORD_IS_ALL_ONES(dword)                                    \
 218         ((dword).u32[0] == ~((__force __le32) 0))
 219 
 220 #if BITS_PER_LONG == 64
 221 #define EFX_OWORD_FIELD         EFX_OWORD_FIELD64
 222 #define EFX_QWORD_FIELD         EFX_QWORD_FIELD64
 223 #define EFX_OWORD_IS_ZERO       EFX_OWORD_IS_ZERO64
 224 #define EFX_QWORD_IS_ZERO       EFX_QWORD_IS_ZERO64
 225 #define EFX_OWORD_IS_ALL_ONES   EFX_OWORD_IS_ALL_ONES64
 226 #define EFX_QWORD_IS_ALL_ONES   EFX_QWORD_IS_ALL_ONES64
 227 #else
 228 #define EFX_OWORD_FIELD         EFX_OWORD_FIELD32
 229 #define EFX_QWORD_FIELD         EFX_QWORD_FIELD32
 230 #define EFX_OWORD_IS_ZERO       EFX_OWORD_IS_ZERO32
 231 #define EFX_QWORD_IS_ZERO       EFX_QWORD_IS_ZERO32
 232 #define EFX_OWORD_IS_ALL_ONES   EFX_OWORD_IS_ALL_ONES32
 233 #define EFX_QWORD_IS_ALL_ONES   EFX_QWORD_IS_ALL_ONES32
 234 #endif
 235 
 236 /*
 237  * Construct bit field portion
 238  *
 239  * Creates the portion of the bit field [low,high) that lies within
 240  * the range [min,max).
 241  */
 242 #define EFX_INSERT_NATIVE64(min, max, low, high, value)         \
 243         (((low > max) || (high < min)) ? 0 :                    \
 244          ((low > min) ?                                         \
 245           (((u64) (value)) << (low - min)) :            \
 246           (((u64) (value)) >> (min - low))))
 247 
 248 #define EFX_INSERT_NATIVE32(min, max, low, high, value)         \
 249         (((low > max) || (high < min)) ? 0 :                    \
 250          ((low > min) ?                                         \
 251           (((u32) (value)) << (low - min)) :            \
 252           (((u32) (value)) >> (min - low))))
 253 
 254 #define EFX_INSERT_NATIVE(min, max, low, high, value)           \
 255         ((((max - min) >= 32) || ((high - low) >= 32)) ?        \
 256          EFX_INSERT_NATIVE64(min, max, low, high, value) :      \
 257          EFX_INSERT_NATIVE32(min, max, low, high, value))
 258 
 259 /*
 260  * Construct bit field portion
 261  *
 262  * Creates the portion of the named bit field that lies within the
 263  * range [min,max).
 264  */
 265 #define EFX_INSERT_FIELD_NATIVE(min, max, field, value)         \
 266         EFX_INSERT_NATIVE(min, max, EFX_LOW_BIT(field),         \
 267                           EFX_HIGH_BIT(field), value)
 268 
 269 /*
 270  * Construct bit field
 271  *
 272  * Creates the portion of the named bit fields that lie within the
 273  * range [min,max).
 274  */
 275 #define EFX_INSERT_FIELDS_NATIVE(min, max,                              \
 276                                  field1, value1,                        \
 277                                  field2, value2,                        \
 278                                  field3, value3,                        \
 279                                  field4, value4,                        \
 280                                  field5, value5,                        \
 281                                  field6, value6,                        \
 282                                  field7, value7,                        \
 283                                  field8, value8,                        \
 284                                  field9, value9,                        \
 285                                  field10, value10)                      \
 286         (EFX_INSERT_FIELD_NATIVE((min), (max), field1, (value1)) |      \
 287          EFX_INSERT_FIELD_NATIVE((min), (max), field2, (value2)) |      \
 288          EFX_INSERT_FIELD_NATIVE((min), (max), field3, (value3)) |      \
 289          EFX_INSERT_FIELD_NATIVE((min), (max), field4, (value4)) |      \
 290          EFX_INSERT_FIELD_NATIVE((min), (max), field5, (value5)) |      \
 291          EFX_INSERT_FIELD_NATIVE((min), (max), field6, (value6)) |      \
 292          EFX_INSERT_FIELD_NATIVE((min), (max), field7, (value7)) |      \
 293          EFX_INSERT_FIELD_NATIVE((min), (max), field8, (value8)) |      \
 294          EFX_INSERT_FIELD_NATIVE((min), (max), field9, (value9)) |      \
 295          EFX_INSERT_FIELD_NATIVE((min), (max), field10, (value10)))
 296 
 297 #define EFX_INSERT_FIELDS64(...)                                \
 298         cpu_to_le64(EFX_INSERT_FIELDS_NATIVE(__VA_ARGS__))
 299 
 300 #define EFX_INSERT_FIELDS32(...)                                \
 301         cpu_to_le32(EFX_INSERT_FIELDS_NATIVE(__VA_ARGS__))
 302 
 303 #define EFX_POPULATE_OWORD64(oword, ...) do {                           \
 304         (oword).u64[0] = EFX_INSERT_FIELDS64(0, 63, __VA_ARGS__);       \
 305         (oword).u64[1] = EFX_INSERT_FIELDS64(64, 127, __VA_ARGS__);     \
 306         } while (0)
 307 
 308 #define EFX_POPULATE_QWORD64(qword, ...) do {                           \
 309         (qword).u64[0] = EFX_INSERT_FIELDS64(0, 63, __VA_ARGS__);       \
 310         } while (0)
 311 
 312 #define EFX_POPULATE_OWORD32(oword, ...) do {                           \
 313         (oword).u32[0] = EFX_INSERT_FIELDS32(0, 31, __VA_ARGS__);       \
 314         (oword).u32[1] = EFX_INSERT_FIELDS32(32, 63, __VA_ARGS__);      \
 315         (oword).u32[2] = EFX_INSERT_FIELDS32(64, 95, __VA_ARGS__);      \
 316         (oword).u32[3] = EFX_INSERT_FIELDS32(96, 127, __VA_ARGS__);     \
 317         } while (0)
 318 
 319 #define EFX_POPULATE_QWORD32(qword, ...) do {                           \
 320         (qword).u32[0] = EFX_INSERT_FIELDS32(0, 31, __VA_ARGS__);       \
 321         (qword).u32[1] = EFX_INSERT_FIELDS32(32, 63, __VA_ARGS__);      \
 322         } while (0)
 323 
 324 #define EFX_POPULATE_DWORD(dword, ...) do {                             \
 325         (dword).u32[0] = EFX_INSERT_FIELDS32(0, 31, __VA_ARGS__);       \
 326         } while (0)
 327 
 328 #if BITS_PER_LONG == 64
 329 #define EFX_POPULATE_OWORD EFX_POPULATE_OWORD64
 330 #define EFX_POPULATE_QWORD EFX_POPULATE_QWORD64
 331 #else
 332 #define EFX_POPULATE_OWORD EFX_POPULATE_OWORD32
 333 #define EFX_POPULATE_QWORD EFX_POPULATE_QWORD32
 334 #endif
 335 
 336 /* Populate an octword field with various numbers of arguments */
 337 #define EFX_POPULATE_OWORD_10 EFX_POPULATE_OWORD
 338 #define EFX_POPULATE_OWORD_9(oword, ...) \
 339         EFX_POPULATE_OWORD_10(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 340 #define EFX_POPULATE_OWORD_8(oword, ...) \
 341         EFX_POPULATE_OWORD_9(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 342 #define EFX_POPULATE_OWORD_7(oword, ...) \
 343         EFX_POPULATE_OWORD_8(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 344 #define EFX_POPULATE_OWORD_6(oword, ...) \
 345         EFX_POPULATE_OWORD_7(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 346 #define EFX_POPULATE_OWORD_5(oword, ...) \
 347         EFX_POPULATE_OWORD_6(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 348 #define EFX_POPULATE_OWORD_4(oword, ...) \
 349         EFX_POPULATE_OWORD_5(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 350 #define EFX_POPULATE_OWORD_3(oword, ...) \
 351         EFX_POPULATE_OWORD_4(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 352 #define EFX_POPULATE_OWORD_2(oword, ...) \
 353         EFX_POPULATE_OWORD_3(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 354 #define EFX_POPULATE_OWORD_1(oword, ...) \
 355         EFX_POPULATE_OWORD_2(oword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 356 #define EFX_ZERO_OWORD(oword) \
 357         EFX_POPULATE_OWORD_1(oword, EFX_DUMMY_FIELD, 0)
 358 #define EFX_SET_OWORD(oword) \
 359         EFX_POPULATE_OWORD_4(oword, \
 360                              EFX_DWORD_0, 0xffffffff, \
 361                              EFX_DWORD_1, 0xffffffff, \
 362                              EFX_DWORD_2, 0xffffffff, \
 363                              EFX_DWORD_3, 0xffffffff)
 364 
 365 /* Populate a quadword field with various numbers of arguments */
 366 #define EFX_POPULATE_QWORD_10 EFX_POPULATE_QWORD
 367 #define EFX_POPULATE_QWORD_9(qword, ...) \
 368         EFX_POPULATE_QWORD_10(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 369 #define EFX_POPULATE_QWORD_8(qword, ...) \
 370         EFX_POPULATE_QWORD_9(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 371 #define EFX_POPULATE_QWORD_7(qword, ...) \
 372         EFX_POPULATE_QWORD_8(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 373 #define EFX_POPULATE_QWORD_6(qword, ...) \
 374         EFX_POPULATE_QWORD_7(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 375 #define EFX_POPULATE_QWORD_5(qword, ...) \
 376         EFX_POPULATE_QWORD_6(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 377 #define EFX_POPULATE_QWORD_4(qword, ...) \
 378         EFX_POPULATE_QWORD_5(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 379 #define EFX_POPULATE_QWORD_3(qword, ...) \
 380         EFX_POPULATE_QWORD_4(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 381 #define EFX_POPULATE_QWORD_2(qword, ...) \
 382         EFX_POPULATE_QWORD_3(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 383 #define EFX_POPULATE_QWORD_1(qword, ...) \
 384         EFX_POPULATE_QWORD_2(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 385 #define EFX_ZERO_QWORD(qword) \
 386         EFX_POPULATE_QWORD_1(qword, EFX_DUMMY_FIELD, 0)
 387 #define EFX_SET_QWORD(qword) \
 388         EFX_POPULATE_QWORD_2(qword, \
 389                              EFX_DWORD_0, 0xffffffff, \
 390                              EFX_DWORD_1, 0xffffffff)
 391 
 392 /* Populate a dword field with various numbers of arguments */
 393 #define EFX_POPULATE_DWORD_10 EFX_POPULATE_DWORD
 394 #define EFX_POPULATE_DWORD_9(dword, ...) \
 395         EFX_POPULATE_DWORD_10(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 396 #define EFX_POPULATE_DWORD_8(dword, ...) \
 397         EFX_POPULATE_DWORD_9(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 398 #define EFX_POPULATE_DWORD_7(dword, ...) \
 399         EFX_POPULATE_DWORD_8(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 400 #define EFX_POPULATE_DWORD_6(dword, ...) \
 401         EFX_POPULATE_DWORD_7(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 402 #define EFX_POPULATE_DWORD_5(dword, ...) \
 403         EFX_POPULATE_DWORD_6(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 404 #define EFX_POPULATE_DWORD_4(dword, ...) \
 405         EFX_POPULATE_DWORD_5(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 406 #define EFX_POPULATE_DWORD_3(dword, ...) \
 407         EFX_POPULATE_DWORD_4(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 408 #define EFX_POPULATE_DWORD_2(dword, ...) \
 409         EFX_POPULATE_DWORD_3(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 410 #define EFX_POPULATE_DWORD_1(dword, ...) \
 411         EFX_POPULATE_DWORD_2(dword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
 412 #define EFX_ZERO_DWORD(dword) \
 413         EFX_POPULATE_DWORD_1(dword, EFX_DUMMY_FIELD, 0)
 414 #define EFX_SET_DWORD(dword) \
 415         EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0, 0xffffffff)
 416 
 417 /*
 418  * Modify a named field within an already-populated structure.  Used
 419  * for read-modify-write operations.
 420  *
 421  */
 422 #define EFX_INVERT_OWORD(oword) do {            \
 423         (oword).u64[0] = ~((oword).u64[0]);     \
 424         (oword).u64[1] = ~((oword).u64[1]);     \
 425         } while (0)
 426 
 427 #define EFX_AND_OWORD(oword, from, mask)                        \
 428         do {                                                    \
 429                 (oword).u64[0] = (from).u64[0] & (mask).u64[0]; \
 430                 (oword).u64[1] = (from).u64[1] & (mask).u64[1]; \
 431         } while (0)
 432 
 433 #define EFX_AND_QWORD(qword, from, mask)                        \
 434                 (qword).u64[0] = (from).u64[0] & (mask).u64[0]
 435 
 436 #define EFX_OR_OWORD(oword, from, mask)                         \
 437         do {                                                    \
 438                 (oword).u64[0] = (from).u64[0] | (mask).u64[0]; \
 439                 (oword).u64[1] = (from).u64[1] | (mask).u64[1]; \
 440         } while (0)
 441 
 442 #define EFX_INSERT64(min, max, low, high, value)                        \
 443         cpu_to_le64(EFX_INSERT_NATIVE(min, max, low, high, value))
 444 
 445 #define EFX_INSERT32(min, max, low, high, value)                        \
 446         cpu_to_le32(EFX_INSERT_NATIVE(min, max, low, high, value))
 447 
 448 #define EFX_INPLACE_MASK64(min, max, low, high)                         \
 449         EFX_INSERT64(min, max, low, high, EFX_MASK64((high) + 1 - (low)))
 450 
 451 #define EFX_INPLACE_MASK32(min, max, low, high)                         \
 452         EFX_INSERT32(min, max, low, high, EFX_MASK32((high) + 1 - (low)))
 453 
 454 #define EFX_SET_OWORD64(oword, low, high, value) do {                   \
 455         (oword).u64[0] = (((oword).u64[0]                               \
 456                            & ~EFX_INPLACE_MASK64(0,  63, low, high))    \
 457                           | EFX_INSERT64(0,  63, low, high, value));    \
 458         (oword).u64[1] = (((oword).u64[1]                               \
 459                            & ~EFX_INPLACE_MASK64(64, 127, low, high))   \
 460                           | EFX_INSERT64(64, 127, low, high, value));   \
 461         } while (0)
 462 
 463 #define EFX_SET_QWORD64(qword, low, high, value) do {                   \
 464         (qword).u64[0] = (((qword).u64[0]                               \
 465                            & ~EFX_INPLACE_MASK64(0, 63, low, high))     \
 466                           | EFX_INSERT64(0, 63, low, high, value));     \
 467         } while (0)
 468 
 469 #define EFX_SET_OWORD32(oword, low, high, value) do {                   \
 470         (oword).u32[0] = (((oword).u32[0]                               \
 471                            & ~EFX_INPLACE_MASK32(0, 31, low, high))     \
 472                           | EFX_INSERT32(0, 31, low, high, value));     \
 473         (oword).u32[1] = (((oword).u32[1]                               \
 474                            & ~EFX_INPLACE_MASK32(32, 63, low, high))    \
 475                           | EFX_INSERT32(32, 63, low, high, value));    \
 476         (oword).u32[2] = (((oword).u32[2]                               \
 477                            & ~EFX_INPLACE_MASK32(64, 95, low, high))    \
 478                           | EFX_INSERT32(64, 95, low, high, value));    \
 479         (oword).u32[3] = (((oword).u32[3]                               \
 480                            & ~EFX_INPLACE_MASK32(96, 127, low, high))   \
 481                           | EFX_INSERT32(96, 127, low, high, value));   \
 482         } while (0)
 483 
 484 #define EFX_SET_QWORD32(qword, low, high, value) do {                   \
 485         (qword).u32[0] = (((qword).u32[0]                               \
 486                            & ~EFX_INPLACE_MASK32(0, 31, low, high))     \
 487                           | EFX_INSERT32(0, 31, low, high, value));     \
 488         (qword).u32[1] = (((qword).u32[1]                               \
 489                            & ~EFX_INPLACE_MASK32(32, 63, low, high))    \
 490                           | EFX_INSERT32(32, 63, low, high, value));    \
 491         } while (0)
 492 
 493 #define EFX_SET_DWORD32(dword, low, high, value) do {                   \
 494         (dword).u32[0] = (((dword).u32[0]                               \
 495                            & ~EFX_INPLACE_MASK32(0, 31, low, high))     \
 496                           | EFX_INSERT32(0, 31, low, high, value));     \
 497         } while (0)
 498 
 499 #define EFX_SET_OWORD_FIELD64(oword, field, value)                      \
 500         EFX_SET_OWORD64(oword, EFX_LOW_BIT(field),                      \
 501                          EFX_HIGH_BIT(field), value)
 502 
 503 #define EFX_SET_QWORD_FIELD64(qword, field, value)                      \
 504         EFX_SET_QWORD64(qword, EFX_LOW_BIT(field),                      \
 505                          EFX_HIGH_BIT(field), value)
 506 
 507 #define EFX_SET_OWORD_FIELD32(oword, field, value)                      \
 508         EFX_SET_OWORD32(oword, EFX_LOW_BIT(field),                      \
 509                          EFX_HIGH_BIT(field), value)
 510 
 511 #define EFX_SET_QWORD_FIELD32(qword, field, value)                      \
 512         EFX_SET_QWORD32(qword, EFX_LOW_BIT(field),                      \
 513                          EFX_HIGH_BIT(field), value)
 514 
 515 #define EFX_SET_DWORD_FIELD(dword, field, value)                        \
 516         EFX_SET_DWORD32(dword, EFX_LOW_BIT(field),                      \
 517                          EFX_HIGH_BIT(field), value)
 518 
 519 
 520 
 521 #if BITS_PER_LONG == 64
 522 #define EFX_SET_OWORD_FIELD EFX_SET_OWORD_FIELD64
 523 #define EFX_SET_QWORD_FIELD EFX_SET_QWORD_FIELD64
 524 #else
 525 #define EFX_SET_OWORD_FIELD EFX_SET_OWORD_FIELD32
 526 #define EFX_SET_QWORD_FIELD EFX_SET_QWORD_FIELD32
 527 #endif
 528 
 529 /* Used to avoid compiler warnings about shift range exceeding width
 530  * of the data types when dma_addr_t is only 32 bits wide.
 531  */
 532 #define DMA_ADDR_T_WIDTH        (8 * sizeof(dma_addr_t))
 533 #define EFX_DMA_TYPE_WIDTH(width) \
 534         (((width) < DMA_ADDR_T_WIDTH) ? (width) : DMA_ADDR_T_WIDTH)
 535 
 536 
 537 /* Static initialiser */
 538 #define EFX_OWORD32(a, b, c, d)                         \
 539         { .u32 = { cpu_to_le32(a), cpu_to_le32(b),      \
 540                    cpu_to_le32(c), cpu_to_le32(d) } }
 541 
 542 #endif /* EFX_BITFIELD_H */
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/sfc/bitfield.h

INCLUDED FROM
