Hi Gerhard, Thank you for the patch! Yet something to improve: [auto build test ERROR on net-next/master] url: https://github.com/0day-ci/linux/commits/Gerhard-Engleder/TSN-endpoint-Et... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git a5bdc36354cbf1a1a91396f4da548ff484686305 config: m68k-randconfig-r004-20211118 (attached as .config) compiler: m68k-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/3252efb6502fdfc25aa357f7dca6290ba... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Gerhard-Engleder/TSN-endpoint-Ethernet-MAC-driver/20211116-052158 git checkout 3252efb6502fdfc25aa357f7dca6290ba9b140e9 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash drivers/net/ethernet/engleder/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): In file included from include/linux/swab.h:5, from include/uapi/linux/byteorder/big_endian.h:13, from include/linux/byteorder/big_endian.h:5, from arch/m68k/include/uapi/asm/byteorder.h:5, from include/asm-generic/bitops/le.h:7, from arch/m68k/include/asm/bitops.h:529, from include/linux/bitops.h:33, from include/linux/log2.h:12, from include/asm-generic/div64.h:55, from arch/m68k/include/asm/div64.h:6, from include/linux/math.h:5, from include/linux/math64.h:6, from include/linux/time64.h:5, from include/linux/restart_block.h:10, from include/linux/thread_info.h:14, from include/asm-generic/preempt.h:5, from ./arch/m68k/include/generated/asm/preempt.h:1, from include/linux/preempt.h:78, from arch/m68k/include/asm/irqflags.h:6, from include/linux/irqflags.h:16, from arch/m68k/include/asm/atomic.h:6, from include/linux/atomic.h:7, from include/linux/rcupdate.h:25, from include/linux/rculist.h:11, from include/linux/pid.h:5, from include/linux/sched.h:14, from include/linux/ratelimit.h:6, from include/linux/dev_printk.h:16, from include/linux/device.h:15, from include/linux/platform_device.h:13, from drivers/net/ethernet/engleder/tsnep.h:9, from drivers/net/ethernet/engleder/tsnep_main.c:18: drivers/net/ethernet/engleder/tsnep_main.c: In function 'tsnep_tx_activate': 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~ include/uapi/linux/swab.h:118:39: note: in definition of macro '__swab32' 118 | (__builtin_constant_p((__u32)(x)) ? \ | ^ drivers/net/ethernet/engleder/tsnep_main.c:292:17: note: in expansion of macro '__cpu_to_le32' 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~~~~~~~~~~~~ 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~ include/uapi/linux/swab.h:19:19: note: in definition of macro '___constant_swab32' 19 | (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \ | ^ include/uapi/linux/byteorder/big_endian.h:33:43: note: in expansion of macro '__swab32' 33 | #define __cpu_to_le32(x) ((__force __le32)__swab32((x))) | ^~~~~~~~ drivers/net/ethernet/engleder/tsnep_main.c:292:17: note: in expansion of macro '__cpu_to_le32' 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~~~~~~~~~~~~ 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~ include/uapi/linux/swab.h:20:19: note: in definition of macro '___constant_swab32' 20 | (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ | ^ include/uapi/linux/byteorder/big_endian.h:33:43: note: in expansion of macro '__swab32' 33 | #define __cpu_to_le32(x) ((__force __le32)__swab32((x))) | ^~~~~~~~ drivers/net/ethernet/engleder/tsnep_main.c:292:17: note: in expansion of macro '__cpu_to_le32' 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~~~~~~~~~~~~ 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~ include/uapi/linux/swab.h:21:19: note: in definition of macro '___constant_swab32' 21 | (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ | ^ include/uapi/linux/byteorder/big_endian.h:33:43: note: in expansion of macro '__swab32' 33 | #define __cpu_to_le32(x) ((__force __le32)__swab32((x))) | ^~~~~~~~ drivers/net/ethernet/engleder/tsnep_main.c:292:17: note: in expansion of macro '__cpu_to_le32' 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~~~~~~~~~~~~ 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~ include/uapi/linux/swab.h:22:19: note: in definition of macro '___constant_swab32' 22 | (((__u32)(x) & (__u32)0xff000000UL) >> 24))) | ^ include/uapi/linux/byteorder/big_endian.h:33:43: note: in expansion of macro '__swab32' 33 | #define __cpu_to_le32(x) ((__force __le32)__swab32((x))) | ^~~~~~~~ drivers/net/ethernet/engleder/tsnep_main.c:292:17: note: in expansion of macro '__cpu_to_le32' 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~~~~~~~~~~~~ 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~ include/uapi/linux/swab.h:120:19: note: in definition of macro '__swab32' 120 | __fswab32(x)) | ^ drivers/net/ethernet/engleder/tsnep_main.c:292:17: note: in expansion of macro '__cpu_to_le32' 292 | __cpu_to_le32(entry->len & TSNEP_DESC_LENGTH_MASK); | ^~~~~~~~~~~~~ drivers/net/ethernet/engleder/tsnep_main.c: In function 'tsnep_tx_unmap': 343 | struct tsnep_tx_entry *entry; | ^~~~~ drivers/net/ethernet/engleder/tsnep_main.c: In function 'tsnep_rx_ring_cleanup': 543 | if (entry->dma) | ^~ In file included from drivers/net/ethernet/engleder/tsnep.h:10, from drivers/net/ethernet/engleder/tsnep_main.c:18: drivers/net/ethernet/engleder/tsnep_main.c:544:55: error: 'struct tsnep_rx_entry' has no member named 'dma' 544 | dma_unmap_single(dmadev, entry->dma, entry->len, | ^~ include/linux/dma-mapping.h:407:64: note: in definition of macro 'dma_unmap_single' 407 | #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, 0) | ^ 544 | dma_unmap_single(dmadev, entry->dma, entry->len, | ^~ include/linux/dma-mapping.h:407:67: note: in definition of macro 'dma_unmap_single' 407 | #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, 0) | ^ drivers/net/ethernet/engleder/tsnep_main.c: In function 'tsnep_rx_activate': drivers/net/ethernet/engleder/tsnep_main.c:638:34: error: 'struct tsnep_rx_entry' has no member named 'len' 638 | entry->properties = entry->len & TSNEP_DESC_LENGTH_MASK; | ^~ drivers/net/ethernet/engleder/tsnep_main.c: In function 'tsnep_rx_poll': 666 | int length; | ^~~ 679 | dma = entry->dma; | ^~~ drivers/net/ethernet/engleder/tsnep_main.c:679:17: note: each undeclared identifier is reported only once for each function it appears in drivers/net/ethernet/engleder/tsnep_main.c:679:28: error: 'struct tsnep_rx_entry' has no member named 'dma' 679 | dma = entry->dma; | ^~ 680 | len = entry->len; | ^~~ drivers/net/ethernet/engleder/tsnep_main.c:680:28: error: 'struct tsnep_rx_entry' has no member named 'len' 680 | len = entry->len; | ^~ vim +292 drivers/net/ethernet/engleder/tsnep_main.c 243 244 static void tsnep_tx_activate(struct tsnep_tx *tx, int index, bool last) 245 { 246 struct tsnep_tx_entry *entry = &tx->entry[index]; 247 248 entry->properties = 0; 249 if (entry->skb) { 250 entry->properties = 251 skb_pagelen(entry->skb) & TSNEP_DESC_LENGTH_MASK; 252 entry->properties |= TSNEP_DESC_INTERRUPT_FLAG; 253 if (skb_shinfo(entry->skb)->tx_flags & SKBTX_IN_PROGRESS) 254 entry->properties |= TSNEP_DESC_EXTENDED_WRITEBACK_FLAG; 255 256 /* toggle user flag to prevent false acknowledge 257 * 258 * Only the first fragment is acknowledged. For all other 259 * fragments no acknowledge is done and the last written owner 260 * counter stays in the writeback descriptor. Therefore, it is 261 * possible that the last written owner counter is identical to 262 * the new incremented owner counter and a false acknowledge is 263 * detected before the real acknowledge has been done by 264 * hardware. 265 * 266 * The user flag is used to prevent this situation. The user 267 * flag is copied to the writeback descriptor by the hardware 268 * and is used as additional acknowledge data. By toggeling the 269 * user flag only for the first fragment (which is 270 * acknowledged), it is guaranteed that the last acknowledge 271 * done for this descriptor has used a different user flag and 272 * cannot be detected as false acknowledge. 273 */ 274 entry->owner_user_flag = !entry->owner_user_flag; 275 } 276 if (last) 277 entry->properties |= TSNEP_TX_DESC_LAST_FRAGMENT_FLAG; 278 if (index == tx->increment_owner_counter) { 279 tx->owner_counter++; 280 if (tx->owner_counter == 4) 281 tx->owner_counter = 1; 282 tx->increment_owner_counter--; 283 if (tx->increment_owner_counter < 0) 284 tx->increment_owner_counter = TSNEP_RING_SIZE - 1; 285 } 286 entry->properties |= 287 (tx->owner_counter << TSNEP_DESC_OWNER_COUNTER_SHIFT) & 288 TSNEP_DESC_OWNER_COUNTER_MASK; 289 if (entry->owner_user_flag) 290 entry->properties |= TSNEP_TX_DESC_OWNER_USER_FLAG; 291 entry->desc->more_properties = 293 294 dma_wmb(); 295 296 entry->desc->properties = __cpu_to_le32(entry->properties); 297 } 298 299 static int tsnep_tx_desc_available(struct tsnep_tx *tx) 300 { 301 if (tx->read <= tx->write) 302 return TSNEP_RING_SIZE - tx->write + tx->read - 1; 303 else 304 return tx->read - tx->write - 1; 305 } 306 307 static int tsnep_tx_map(struct sk_buff *skb, struct tsnep_tx *tx, int count) 308 { 309 struct device *dmadev = tx->adapter->dmadev; 310 struct tsnep_tx_entry *entry; 311 unsigned int len; 312 dma_addr_t dma; 313 int i; 314 315 for (i = 0; i < count; i++) { 316 entry = &tx->entry[(tx->write + i) % TSNEP_RING_SIZE]; 317 318 if (i == 0) { 319 len = skb_headlen(skb); 320 dma = dma_map_single(dmadev, skb->data, len, 321 DMA_TO_DEVICE); 322 } else { 323 len = skb_frag_size(&skb_shinfo(skb)->frags[i - 1]); 324 dma = skb_frag_dma_map(dmadev, 325 &skb_shinfo(skb)->frags[i - 1], 326 0, len, DMA_TO_DEVICE); 327 } 328 if (dma_mapping_error(dmadev, dma)) 329 return -ENOMEM; 330 331 dma_unmap_len_set(entry, len, len); 332 dma_unmap_addr_set(entry, dma, dma); 333 334 entry->desc->tx = __cpu_to_le64(dma); 335 } 336 337 return 0; 338 } 339 340 static void tsnep_tx_unmap(struct tsnep_tx *tx, int count) 341 { 342 struct device *dmadev = tx->adapter->dmadev; 344 int i; 345 346 for (i = 0; i < count; i++) { 347 entry = &tx->entry[(tx->read + i) % TSNEP_RING_SIZE]; 348 349 if (dma_unmap_len(entry, len)) { 350 if (i == 0) 351 dma_unmap_single(dmadev, 352 dma_unmap_addr(entry, dma), 353 dma_unmap_len(entry, len), 354 DMA_TO_DEVICE); 355 else 356 dma_unmap_page(dmadev, 357 dma_unmap_addr(entry, dma), 358 dma_unmap_len(entry, len), 359 DMA_TO_DEVICE); 360 dma_unmap_len_set(entry, len, 0); 361 } 362 } 363 } 364 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org