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Date: Wed, 30 Nov 2022 22:34:30 +0800
From: kernel test robot <lkp@...el.com>
To: JaimeLiao <jaimeliao.tw@...il.com>, broonie@...nel.org,
krzysztof.kozlowski@...aro.org, linux-spi@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
jaimeliao@...c.com.tw, JaimeLiao <jaimeliao.tw@...il.com>
Subject: Re: [PATCH v1 2/2] memory: renesas-rpc-if: Add Octal DTR mode support
Hi JaimeLiao,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on broonie-spi/for-next]
[also build test WARNING on krzk-mem-ctrl/for-next linus/master v6.1-rc7 next-20221130]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/JaimeLiao/Add-Octal-DTR-support-on-RPC-driver/20221124-154211
base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
patch link: https://lore.kernel.org/r/20221124073957.22471-3-jaimeliao.tw%40gmail.com
patch subject: [PATCH v1 2/2] memory: renesas-rpc-if: Add Octal DTR mode support
config: hexagon-randconfig-r004-20221128
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 6e4cea55f0d1104408b26ac574566a0e4de48036)
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/intel-lab-lkp/linux/commit/61bae8cb17ad5715386ee18a1d06549843775cd0
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review JaimeLiao/Add-Octal-DTR-support-on-RPC-driver/20221124-154211
git checkout 61bae8cb17ad5715386ee18a1d06549843775cd0
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/memory/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from drivers/memory/renesas-rpc-if.c:11:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from drivers/memory/renesas-rpc-if.c:11:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from drivers/memory/renesas-rpc-if.c:11:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
>> drivers/memory/renesas-rpc-if.c:484:30: warning: use of logical '&&' with constant operand [-Wconstant-logical-operand]
if (op->ocmd.buswidth == 8 && RPCIF_SMENR_OCDE)
^ ~~~~~~~~~~~~~~~~
drivers/memory/renesas-rpc-if.c:484:30: note: use '&' for a bitwise operation
if (op->ocmd.buswidth == 8 && RPCIF_SMENR_OCDE)
^~
&
drivers/memory/renesas-rpc-if.c:484:30: note: remove constant to silence this warning
if (op->ocmd.buswidth == 8 && RPCIF_SMENR_OCDE)
~^~~~~~~~~~~~~~~~~~~
7 warnings generated.
vim +484 drivers/memory/renesas-rpc-if.c
381
382 void rpcif_prepare(struct rpcif *rpc, const struct rpcif_op *op, u64 *offs,
383 size_t *len)
384 {
385 rpc->smcr = 0;
386 rpc->smadr = 0;
387 rpc->enable = 0;
388 rpc->command = 0;
389 rpc->option = 0;
390 rpc->dummy = 0;
391 rpc->ddr = 0;
392 rpc->xferlen = 0;
393
394 if (op->cmd.buswidth) {
395 rpc->enable = RPCIF_SMENR_CDE |
396 RPCIF_SMENR_CDB(rpcif_bit_size(op->cmd.buswidth));
397 rpc->command = RPCIF_SMCMR_CMD(op->cmd.opcode);
398 if (op->cmd.ddr)
399 rpc->ddr = RPCIF_SMDRENR_HYPE(0x5);
400 }
401 if (op->ocmd.buswidth) {
402 rpc->enable |= RPCIF_SMENR_OCDE |
403 RPCIF_SMENR_OCDB(rpcif_bit_size(op->ocmd.buswidth));
404 rpc->command |= RPCIF_SMCMR_OCMD(op->ocmd.opcode);
405 }
406
407 if (op->addr.buswidth) {
408 rpc->enable |=
409 RPCIF_SMENR_ADB(rpcif_bit_size(op->addr.buswidth));
410 if (op->addr.nbytes == 4)
411 rpc->enable |= RPCIF_SMENR_ADE(0xF);
412 else
413 rpc->enable |= RPCIF_SMENR_ADE(GENMASK(
414 2, 3 - op->addr.nbytes));
415 if (op->addr.ddr)
416 rpc->ddr |= RPCIF_SMDRENR_ADDRE;
417
418 if (offs && len)
419 rpc->smadr = *offs;
420 else
421 rpc->smadr = op->addr.val;
422 }
423
424 if (op->dummy.buswidth) {
425 rpc->enable |= RPCIF_SMENR_DME;
426 rpc->dummy = RPCIF_SMDMCR_DMCYC(op->dummy.ncycles /
427 op->dummy.buswidth);
428 }
429
430 if (op->option.buswidth) {
431 rpc->enable |= RPCIF_SMENR_OPDE(
432 rpcif_bits_set(rpc, op->option.nbytes)) |
433 RPCIF_SMENR_OPDB(rpcif_bit_size(op->option.buswidth));
434 if (op->option.ddr)
435 rpc->ddr |= RPCIF_SMDRENR_OPDRE;
436 rpc->option = op->option.val;
437 }
438
439 rpc->dir = op->data.dir;
440 if (op->data.buswidth) {
441 u32 nbytes;
442
443 rpc->buffer = op->data.buf.in;
444 switch (op->data.dir) {
445 case RPCIF_DATA_IN:
446 rpc->smcr = RPCIF_SMCR_SPIRE;
447 break;
448 case RPCIF_DATA_OUT:
449 rpc->smcr = RPCIF_SMCR_SPIWE;
450 break;
451 default:
452 break;
453 }
454 if (op->data.ddr)
455 rpc->ddr |= RPCIF_SMDRENR_SPIDRE;
456
457 if (offs && len)
458 nbytes = *len;
459 else
460 nbytes = op->data.nbytes;
461 rpc->xferlen = nbytes;
462
463 rpc->enable |= RPCIF_SMENR_SPIDB(rpcif_bit_size(op->data.buswidth));
464 }
465 /* Fixup in Octal DTR mode */
466 if (op->cmd.buswidth == 8 && op->cmd.ddr) {
467 rpc->bus_size = 2;
468
469 regmap_update_bits(rpc->regmap, RPCIF_PHYCNT,
470 RPCIF_PHYCNT_OCTA(0x2) | RPCIF_PHYCNT_OCT |
471 RPCIF_PHYCNT_PHYMEM(0x1) ,
472 RPCIF_PHYCNT_OCTA(0x2) | RPCIF_PHYCNT_OCT |
473 RPCIF_PHYCNT_PHYMEM(0x1));
474 regmap_update_bits(rpc->regmap, RPCIF_CMNCR, RPCIF_CMNCR_BSZ(1),
475 RPCIF_CMNCR_BSZ(1));
476
477 regmap_update_bits(rpc->regmap, RPCIF_PHYOFFSET1,
478 RPCIF_PHYOFFSET1_DDRTMG(3),
479 RPCIF_PHYOFFSET1_DDRTMG(2));
480 regmap_update_bits(rpc->regmap, RPCIF_PHYOFFSET2,
481 RPCIF_PHYOFFSET2_OCTTMG(7),
482 RPCIF_PHYOFFSET2_OCTTMG(3));
483
> 484 if (op->ocmd.buswidth == 8 && RPCIF_SMENR_OCDE)
485 rpc->enable &= ~RPCIF_SMENR_OCDE;
486
487 if (op->addr.ddr)
488 rpc->enable &= ~RPCIF_SMENR_ADE(0xF) |
489 RPCIF_SMENR_ADE(0xc);
490
491 if (op->dummy.buswidth == 8)
492 rpc->dummy =
493 RPCIF_SMDMCR_DMCYC(op->dummy.ncycles / 2);
494
495 if (op->data.dir == RPCIF_DATA_IN)
496 /* Set Extenal Address space Read mode */
497 if (op->data.buswidth == 8 && op->data.ddr) {
498 regmap_update_bits(rpc->regmap, RPCIF_PHYCNT,
499 RPCIF_PHYCNT_EXDS, RPCIF_PHYCNT_EXDS);
500 }
501 }
502 }
503 EXPORT_SYMBOL(rpcif_prepare);
504
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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