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SubjectRe: [PATCH 4/4] staging: fsl-dpaa2/eth: allow the driver to compile multi-arch
Hi Ioana,

I love your patch! Perhaps something to improve:

[auto build test WARNING on staging/staging-testing]
[also build test WARNING on v4.16-rc3 next-20180227]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Ioana-Radulescu/staging-fsl-mc-dpio-fsl-dpaa2-eth-Enable-multi-arch-compile/20180228-062457
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/staging/fsl-dpaa2/ethernet/../../fsl-mc/include/dpaa2-fd.h:290:16: sparse: cast from restricted __le64
>> drivers/staging/fsl-dpaa2/ethernet/../../fsl-mc/include/dpaa2-fd.h:290:16: sparse: cast to restricted __le64
>> drivers/staging/fsl-dpaa2/ethernet/../../fsl-mc/include/dpaa2-fd.h:290:16: sparse: cast from restricted __le64
>> drivers/staging/fsl-dpaa2/ethernet/../../fsl-mc/include/dpaa2-fd.h:290:16: sparse: cast to restricted __le64
>> drivers/staging/fsl-dpaa2/ethernet/../../fsl-mc/include/dpaa2-fd.h:421:30: sparse: cast truncates bits from constant value (ffff7fff becomes 7fff)
--
>> drivers/staging/fsl-dpaa2/ethernet/dpni.c:1624:22: sparse: cast to restricted __le16
drivers/staging/fsl-dpaa2/ethernet/dpni.c:1625:22: sparse: cast to restricted __le16

vim +290 drivers/staging/fsl-dpaa2/ethernet/../../fsl-mc/include/dpaa2-fd.h

d3269bdc Roy Pledge 2017-03-13 281
d3269bdc Roy Pledge 2017-03-13 282 /**
d3269bdc Roy Pledge 2017-03-13 283 * dpaa2_sg_get_addr() - Get the address from SG entry
d3269bdc Roy Pledge 2017-03-13 284 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 285 *
d3269bdc Roy Pledge 2017-03-13 286 * Return the address.
d3269bdc Roy Pledge 2017-03-13 287 */
d3269bdc Roy Pledge 2017-03-13 288 static inline dma_addr_t dpaa2_sg_get_addr(const struct dpaa2_sg_entry *sg)
d3269bdc Roy Pledge 2017-03-13 289 {
d3269bdc Roy Pledge 2017-03-13 @290 return le64_to_cpu((dma_addr_t)sg->addr);
d3269bdc Roy Pledge 2017-03-13 291 }
d3269bdc Roy Pledge 2017-03-13 292
d3269bdc Roy Pledge 2017-03-13 293 /**
d3269bdc Roy Pledge 2017-03-13 294 * dpaa2_sg_set_addr() - Set the address in SG entry
d3269bdc Roy Pledge 2017-03-13 295 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 296 * @addr: the address to be set
d3269bdc Roy Pledge 2017-03-13 297 */
d3269bdc Roy Pledge 2017-03-13 298 static inline void dpaa2_sg_set_addr(struct dpaa2_sg_entry *sg, dma_addr_t addr)
d3269bdc Roy Pledge 2017-03-13 299 {
d3269bdc Roy Pledge 2017-03-13 300 sg->addr = cpu_to_le64(addr);
d3269bdc Roy Pledge 2017-03-13 301 }
d3269bdc Roy Pledge 2017-03-13 302
d3269bdc Roy Pledge 2017-03-13 303 static inline bool dpaa2_sg_short_len(const struct dpaa2_sg_entry *sg)
d3269bdc Roy Pledge 2017-03-13 304 {
d3269bdc Roy Pledge 2017-03-13 305 return !!((le16_to_cpu(sg->format_offset) >> SG_SHORT_LEN_FLAG_SHIFT)
d3269bdc Roy Pledge 2017-03-13 306 & SG_SHORT_LEN_FLAG_MASK);
d3269bdc Roy Pledge 2017-03-13 307 }
d3269bdc Roy Pledge 2017-03-13 308
d3269bdc Roy Pledge 2017-03-13 309 /**
d3269bdc Roy Pledge 2017-03-13 310 * dpaa2_sg_get_len() - Get the length in SG entry
d3269bdc Roy Pledge 2017-03-13 311 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 312 *
d3269bdc Roy Pledge 2017-03-13 313 * Return the length.
d3269bdc Roy Pledge 2017-03-13 314 */
d3269bdc Roy Pledge 2017-03-13 315 static inline u32 dpaa2_sg_get_len(const struct dpaa2_sg_entry *sg)
d3269bdc Roy Pledge 2017-03-13 316 {
d3269bdc Roy Pledge 2017-03-13 317 if (dpaa2_sg_short_len(sg))
d3269bdc Roy Pledge 2017-03-13 318 return le32_to_cpu(sg->len) & SG_SHORT_LEN_MASK;
d3269bdc Roy Pledge 2017-03-13 319
d3269bdc Roy Pledge 2017-03-13 320 return le32_to_cpu(sg->len);
d3269bdc Roy Pledge 2017-03-13 321 }
d3269bdc Roy Pledge 2017-03-13 322
d3269bdc Roy Pledge 2017-03-13 323 /**
d3269bdc Roy Pledge 2017-03-13 324 * dpaa2_sg_set_len() - Set the length in SG entry
d3269bdc Roy Pledge 2017-03-13 325 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 326 * @len: the length to be set
d3269bdc Roy Pledge 2017-03-13 327 */
d3269bdc Roy Pledge 2017-03-13 328 static inline void dpaa2_sg_set_len(struct dpaa2_sg_entry *sg, u32 len)
d3269bdc Roy Pledge 2017-03-13 329 {
d3269bdc Roy Pledge 2017-03-13 330 sg->len = cpu_to_le32(len);
d3269bdc Roy Pledge 2017-03-13 331 }
d3269bdc Roy Pledge 2017-03-13 332
d3269bdc Roy Pledge 2017-03-13 333 /**
d3269bdc Roy Pledge 2017-03-13 334 * dpaa2_sg_get_offset() - Get the offset in SG entry
d3269bdc Roy Pledge 2017-03-13 335 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 336 *
d3269bdc Roy Pledge 2017-03-13 337 * Return the offset.
d3269bdc Roy Pledge 2017-03-13 338 */
d3269bdc Roy Pledge 2017-03-13 339 static inline u16 dpaa2_sg_get_offset(const struct dpaa2_sg_entry *sg)
d3269bdc Roy Pledge 2017-03-13 340 {
d3269bdc Roy Pledge 2017-03-13 341 return le16_to_cpu(sg->format_offset) & SG_OFFSET_MASK;
d3269bdc Roy Pledge 2017-03-13 342 }
d3269bdc Roy Pledge 2017-03-13 343
d3269bdc Roy Pledge 2017-03-13 344 /**
d3269bdc Roy Pledge 2017-03-13 345 * dpaa2_sg_set_offset() - Set the offset in SG entry
d3269bdc Roy Pledge 2017-03-13 346 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 347 * @offset: the offset to be set
d3269bdc Roy Pledge 2017-03-13 348 */
d3269bdc Roy Pledge 2017-03-13 349 static inline void dpaa2_sg_set_offset(struct dpaa2_sg_entry *sg,
d3269bdc Roy Pledge 2017-03-13 350 u16 offset)
d3269bdc Roy Pledge 2017-03-13 351 {
d3269bdc Roy Pledge 2017-03-13 352 sg->format_offset &= cpu_to_le16(~SG_OFFSET_MASK);
d3269bdc Roy Pledge 2017-03-13 353 sg->format_offset |= cpu_to_le16(offset);
d3269bdc Roy Pledge 2017-03-13 354 }
d3269bdc Roy Pledge 2017-03-13 355
d3269bdc Roy Pledge 2017-03-13 356 /**
d3269bdc Roy Pledge 2017-03-13 357 * dpaa2_sg_get_format() - Get the SG format in SG entry
d3269bdc Roy Pledge 2017-03-13 358 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 359 *
d3269bdc Roy Pledge 2017-03-13 360 * Return the format.
d3269bdc Roy Pledge 2017-03-13 361 */
d3269bdc Roy Pledge 2017-03-13 362 static inline enum dpaa2_sg_format
d3269bdc Roy Pledge 2017-03-13 363 dpaa2_sg_get_format(const struct dpaa2_sg_entry *sg)
d3269bdc Roy Pledge 2017-03-13 364 {
d3269bdc Roy Pledge 2017-03-13 365 return (enum dpaa2_sg_format)((le16_to_cpu(sg->format_offset)
d3269bdc Roy Pledge 2017-03-13 366 >> SG_FORMAT_SHIFT) & SG_FORMAT_MASK);
d3269bdc Roy Pledge 2017-03-13 367 }
d3269bdc Roy Pledge 2017-03-13 368
d3269bdc Roy Pledge 2017-03-13 369 /**
d3269bdc Roy Pledge 2017-03-13 370 * dpaa2_sg_set_format() - Set the SG format in SG entry
d3269bdc Roy Pledge 2017-03-13 371 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 372 * @format: the format to be set
d3269bdc Roy Pledge 2017-03-13 373 */
d3269bdc Roy Pledge 2017-03-13 374 static inline void dpaa2_sg_set_format(struct dpaa2_sg_entry *sg,
d3269bdc Roy Pledge 2017-03-13 375 enum dpaa2_sg_format format)
d3269bdc Roy Pledge 2017-03-13 376 {
d3269bdc Roy Pledge 2017-03-13 377 sg->format_offset &= cpu_to_le16(~(SG_FORMAT_MASK << SG_FORMAT_SHIFT));
d3269bdc Roy Pledge 2017-03-13 378 sg->format_offset |= cpu_to_le16(format << SG_FORMAT_SHIFT);
d3269bdc Roy Pledge 2017-03-13 379 }
d3269bdc Roy Pledge 2017-03-13 380
d3269bdc Roy Pledge 2017-03-13 381 /**
d3269bdc Roy Pledge 2017-03-13 382 * dpaa2_sg_get_bpid() - Get the buffer pool id in SG entry
d3269bdc Roy Pledge 2017-03-13 383 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 384 *
d3269bdc Roy Pledge 2017-03-13 385 * Return the bpid.
d3269bdc Roy Pledge 2017-03-13 386 */
d3269bdc Roy Pledge 2017-03-13 387 static inline u16 dpaa2_sg_get_bpid(const struct dpaa2_sg_entry *sg)
d3269bdc Roy Pledge 2017-03-13 388 {
d3269bdc Roy Pledge 2017-03-13 389 return le16_to_cpu(sg->bpid) & SG_BPID_MASK;
d3269bdc Roy Pledge 2017-03-13 390 }
d3269bdc Roy Pledge 2017-03-13 391
d3269bdc Roy Pledge 2017-03-13 392 /**
d3269bdc Roy Pledge 2017-03-13 393 * dpaa2_sg_set_bpid() - Set the buffer pool id in SG entry
d3269bdc Roy Pledge 2017-03-13 394 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 395 * @bpid: the bpid to be set
d3269bdc Roy Pledge 2017-03-13 396 */
d3269bdc Roy Pledge 2017-03-13 397 static inline void dpaa2_sg_set_bpid(struct dpaa2_sg_entry *sg, u16 bpid)
d3269bdc Roy Pledge 2017-03-13 398 {
d3269bdc Roy Pledge 2017-03-13 399 sg->bpid &= cpu_to_le16(~(SG_BPID_MASK));
d3269bdc Roy Pledge 2017-03-13 400 sg->bpid |= cpu_to_le16(bpid);
d3269bdc Roy Pledge 2017-03-13 401 }
d3269bdc Roy Pledge 2017-03-13 402
d3269bdc Roy Pledge 2017-03-13 403 /**
d3269bdc Roy Pledge 2017-03-13 404 * dpaa2_sg_is_final() - Check final bit in SG entry
d3269bdc Roy Pledge 2017-03-13 405 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 406 *
d3269bdc Roy Pledge 2017-03-13 407 * Return bool.
d3269bdc Roy Pledge 2017-03-13 408 */
d3269bdc Roy Pledge 2017-03-13 409 static inline bool dpaa2_sg_is_final(const struct dpaa2_sg_entry *sg)
d3269bdc Roy Pledge 2017-03-13 410 {
d3269bdc Roy Pledge 2017-03-13 411 return !!(le16_to_cpu(sg->format_offset) >> SG_FINAL_FLAG_SHIFT);
d3269bdc Roy Pledge 2017-03-13 412 }
d3269bdc Roy Pledge 2017-03-13 413
d3269bdc Roy Pledge 2017-03-13 414 /**
d3269bdc Roy Pledge 2017-03-13 415 * dpaa2_sg_set_final() - Set the final bit in SG entry
d3269bdc Roy Pledge 2017-03-13 416 * @sg: the given scatter-gathering object
d3269bdc Roy Pledge 2017-03-13 417 * @final: the final boolean to be set
d3269bdc Roy Pledge 2017-03-13 418 */
d3269bdc Roy Pledge 2017-03-13 419 static inline void dpaa2_sg_set_final(struct dpaa2_sg_entry *sg, bool final)
d3269bdc Roy Pledge 2017-03-13 420 {
d3269bdc Roy Pledge 2017-03-13 @421 sg->format_offset &= cpu_to_le16(~(SG_FINAL_FLAG_MASK
d3269bdc Roy Pledge 2017-03-13 422 << SG_FINAL_FLAG_SHIFT));
d3269bdc Roy Pledge 2017-03-13 423 sg->format_offset |= cpu_to_le16(final << SG_FINAL_FLAG_SHIFT);
d3269bdc Roy Pledge 2017-03-13 424 }
d3269bdc Roy Pledge 2017-03-13 425

:::::: The code at line 290 was first introduced by commit
:::::: d3269bdc7ebcf8bce7969a68d7108ec5890d8173 bus: fsl-mc: dpio: add frame descriptor and scatter/gather APIs

:::::: TO: Roy Pledge <Roy.Pledge@nxp.com>
:::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

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