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Message-ID: <3780919b-c9ce-2ab6-be3a-376752c608ac@synopsys.com>
Date: Wed, 27 Jun 2018 15:32:11 +0100
From: Jose Abreu <Jose.Abreu@...opsys.com>
To: kbuild test robot <lkp@...el.com>,
Jose Abreu <Jose.Abreu@...opsys.com>,
<linux-sh@...r.kernel.org>, Rich Felker <dalias@...c.org>,
Yoshinori Sato <ysato@...rs.sourceforge.jp>
CC: <kbuild-all@...org>, <netdev@...r.kernel.org>,
"David S. Miller" <davem@...emloft.net>,
Joao Pinto <Joao.Pinto@...opsys.com>,
Vitor Soares <Vitor.Soares@...opsys.com>,
Giuseppe Cavallaro <peppe.cavallaro@...com>,
Alexandre Torgue <alexandre.torgue@...com>
Subject: Re: [PATCH net-next] net: stmmac: Add support for CBS QDISC
++ SH Maintainers
++ SH ML
Hi SH Maintainers,
On 27-06-2018 15:15, kbuild test robot wrote:
> Hi Jose,
>
> I love your patch! Perhaps something to improve:
>
> [auto build test WARNING on net-next/master]
>
> url: https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_0day-2Dci_linux_commits_Jose-2DAbreu_net-2Dstmmac-2DAdd-2Dsupport-2Dfor-2DCBS-2DQDISC_20180627-2D214704&d=DwIBAg&c=DPL6_X_6JkXFx7AXWqB0tg&r=WHDsc6kcWAl4i96Vm5hJ_19IJiuxx_p_Rzo2g-uHDKw&m=YIae3rrFzqYg_5b4eVIAXuyvT_EV0vKACS25rJugux8&s=qW5_vbinGt0OnyDfQ2wtKdb2ZGzCcLwq6Fmlaki61xw&e=
> config: sh-allyesconfig (attached as .config)
> compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
> reproduce:
> wget https://urldefense.proofpoint.com/v2/url?u=https-3A__raw.githubusercontent.com_intel_lkp-2Dtests_master_sbin_make.cross&d=DwIBAg&c=DPL6_X_6JkXFx7AXWqB0tg&r=WHDsc6kcWAl4i96Vm5hJ_19IJiuxx_p_Rzo2g-uHDKw&m=YIae3rrFzqYg_5b4eVIAXuyvT_EV0vKACS25rJugux8&s=4nNar4fgVZq0LjrPKIZP30nxVUY4yeu5QeyKbmlsu8A&e= -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # save the attached .config to linux build tree
> GCC_VERSION=7.2.0 make.cross ARCH=sh
>
> All warnings (new ones prefixed by >>):
>
> In file included from ./arch/sh/include/generated/asm/div64.h:1:0,
> from include/linux/kernel.h:174,
> from include/linux/list.h:9,
> from include/linux/timer.h:5,
> from include/linux/workqueue.h:9,
> from include/net/pkt_cls.h:6,
> from drivers/net//ethernet/stmicro/stmmac/stmmac_tc.c:7:
> drivers/net//ethernet/stmicro/stmmac/stmmac_tc.c: In function 'tc_setup_cbs':
> include/asm-generic/div64.h:222:28: warning: comparison of distinct pointer types lacks a cast
> (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
> ^
>>> drivers/net//ethernet/stmicro/stmmac/stmmac_tc.c:325:2: note: in expansion of macro 'do_div'
> do_div(value, speed_div);
> ^~~~~~
> include/asm-generic/div64.h:222:28: warning: comparison of distinct pointer types lacks a cast
> (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
I'm not seeing the reason for this warning as I'm using a 64 bit
var. I guess the warning is appearing only because its signed
[see source bellow]. Is this not supported?
Thanks and Best Regards,
Jose Miguel Abreu
> ^
> drivers/net//ethernet/stmicro/stmmac/stmmac_tc.c:329:2: note: in expansion of macro 'do_div'
> do_div(value, speed_div);
> ^~~~~~
>
> vim +/do_div +325 drivers/net//ethernet/stmicro/stmmac/stmmac_tc.c
>
> 291
> 292 static int tc_setup_cbs(struct stmmac_priv *priv,
> 293 struct tc_cbs_qopt_offload *qopt)
> 294 {
> 295 u32 tx_queues_count = priv->plat->tx_queues_to_use;
> 296 u32 queue = qopt->queue;
> 297 u32 ptr, speed_div;
> 298 u32 mode_to_use;
> 299 s64 value;
> 300 int ret;
> 301
> 302 /* Queue 0 is not AVB capable */
> 303 if (queue <= 0 || queue >= tx_queues_count)
> 304 return -EINVAL;
> 305 if (priv->speed != SPEED_100 && priv->speed != SPEED_1000)
> 306 return -EOPNOTSUPP;
> 307
> 308 mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use;
> 309 if (mode_to_use == MTL_QUEUE_DCB && qopt->enable) {
> 310 ret = stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_AVB);
> 311 if (ret)
> 312 return ret;
> 313
> 314 priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
> 315 } else if (!qopt->enable) {
> 316 return stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_DCB);
> 317 }
> 318
> 319 /* Port Transmit Rate and Speed Divider */
> 320 ptr = (priv->speed == SPEED_100) ? 4 : 8;
> 321 speed_div = (priv->speed == SPEED_100) ? 100000 : 1000000;
> 322
> 323 /* Final adjustments for HW */
> 324 value = qopt->idleslope * 1024 * ptr;
> > 325 do_div(value, speed_div);
> 326 priv->plat->tx_queues_cfg[queue].idle_slope = value & GENMASK(31, 0);
> 327
> 328 value = -qopt->sendslope * 1024UL * ptr;
> 329 do_div(value, speed_div);
> 330 priv->plat->tx_queues_cfg[queue].send_slope = value & GENMASK(31, 0);
> 331
> 332 value = qopt->hicredit * 1024 * 8;
> 333 priv->plat->tx_queues_cfg[queue].high_credit = value & GENMASK(31, 0);
> 334
> 335 value = qopt->locredit * 1024 * 8;
> 336 priv->plat->tx_queues_cfg[queue].low_credit = value & GENMASK(31, 0);
> 337
> 338 ret = stmmac_config_cbs(priv, priv->hw,
> 339 priv->plat->tx_queues_cfg[queue].send_slope,
> 340 priv->plat->tx_queues_cfg[queue].idle_slope,
> 341 priv->plat->tx_queues_cfg[queue].high_credit,
> 342 priv->plat->tx_queues_cfg[queue].low_credit,
> 343 queue);
> 344 if (ret)
> 345 return ret;
> 346
> 347 dev_info(priv->device, "CBS queue %d: send %d, idle %d, hi %d, lo %d\n",
> 348 queue, qopt->sendslope, qopt->idleslope,
> 349 qopt->hicredit, qopt->locredit);
> 350 return 0;
> 351 }
> 352
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.01.org_pipermail_kbuild-2Dall&d=DwIBAg&c=DPL6_X_6JkXFx7AXWqB0tg&r=WHDsc6kcWAl4i96Vm5hJ_19IJiuxx_p_Rzo2g-uHDKw&m=YIae3rrFzqYg_5b4eVIAXuyvT_EV0vKACS25rJugux8&s=yMjbhyNoi6ZESIohHtaqFOTXipZVefU7mA4Tfc5QPms&e= Intel Corporation
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