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Message-ID: <202402160711.PlBR8NLf-lkp@intel.com>
Date: Fri, 16 Feb 2024 07:16:36 +0800
From: kernel test robot <lkp@...el.com>
To: Raju Rangoju <Raju.Rangoju@....com>, netdev@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
pabeni@...hat.com, Shyam-sundar.S-k@....com,
Raju Rangoju <Raju.Rangoju@....com>
Subject: Re: [PATCH v5 net-next 4/5] amd-xgbe: Add XGBE_XPCS_ACCESS_V3
support to xgbe_pci_probe()
Hi Raju,
kernel test robot noticed the following build warnings:
[auto build test WARNING on net-next/main]
url: https://github.com/intel-lab-lkp/linux/commits/Raju-Rangoju/amd-xgbe-reorganize-the-code-of-XPCS-access/20240215-000248
base: net-next/main
patch link: https://lore.kernel.org/r/20240214154842.3577628-5-Raju.Rangoju%40amd.com
patch subject: [PATCH v5 net-next 4/5] amd-xgbe: Add XGBE_XPCS_ACCESS_V3 support to xgbe_pci_probe()
config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20240216/202402160711.PlBR8NLf-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 1c10821022f1799452065fb57474e894e2562b7f)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240216/202402160711.PlBR8NLf-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402160711.PlBR8NLf-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from drivers/net/ethernet/amd/xgbe/xgbe-pci.c:119:
In file included from include/linux/pci.h:39:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:78:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
547 | 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]
560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
| ^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
| ^
In file included from drivers/net/ethernet/amd/xgbe/xgbe-pci.c:119:
In file included from include/linux/pci.h:39:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:78:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
| ^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
| ^
In file included from drivers/net/ethernet/amd/xgbe/xgbe-pci.c:119:
In file included from include/linux/pci.h:39:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:78:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
584 | __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]
594 | __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]
604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
692 | readsb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
700 | readsw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
708 | readsl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
717 | writesb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
726 | writesw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
735 | writesl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
>> drivers/net/ethernet/amd/xgbe/xgbe-pci.c:312:18: warning: variable 'reg' is uninitialized when used here [-Wuninitialized]
312 | XP_GET_BITS(reg, XP_PROP_0, PORT_ID);
| ^~~
drivers/net/ethernet/amd/xgbe/xgbe-common.h:1682:12: note: expanded from macro 'XP_GET_BITS'
1682 | GET_BITS((_var), \
| ^~~~
drivers/net/ethernet/amd/xgbe/xgbe-common.h:1454:5: note: expanded from macro 'GET_BITS'
1454 | (((_var) >> (_index)) & ((0x1 << (_width)) - 1))
| ^~~~
drivers/net/ethernet/amd/xgbe/xgbe-pci.c:212:34: note: initialize the variable 'reg' to silence this warning
212 | unsigned int port_addr_size, reg;
| ^
| = 0
13 warnings generated.
vim +/reg +312 drivers/net/ethernet/amd/xgbe/xgbe-pci.c
208
209 static int xgbe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
210 {
211 void __iomem * const *iomap_table;
212 unsigned int port_addr_size, reg;
213 struct device *dev = &pdev->dev;
214 struct xgbe_prv_data *pdata;
215 unsigned int ma_lo, ma_hi;
216 struct pci_dev *rdev;
217 int bar_mask, ret;
218 u32 address;
219
220 pdata = xgbe_alloc_pdata(dev);
221 if (IS_ERR(pdata)) {
222 ret = PTR_ERR(pdata);
223 goto err_alloc;
224 }
225
226 pdata->pcidev = pdev;
227 pci_set_drvdata(pdev, pdata);
228
229 /* Get the version data */
230 pdata->vdata = (struct xgbe_version_data *)id->driver_data;
231
232 ret = pcim_enable_device(pdev);
233 if (ret) {
234 dev_err(dev, "pcim_enable_device failed\n");
235 goto err_pci_enable;
236 }
237
238 /* Obtain the mmio areas for the device */
239 bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
240 ret = pcim_iomap_regions(pdev, bar_mask, XGBE_DRV_NAME);
241 if (ret) {
242 dev_err(dev, "pcim_iomap_regions failed\n");
243 goto err_pci_enable;
244 }
245
246 iomap_table = pcim_iomap_table(pdev);
247 if (!iomap_table) {
248 dev_err(dev, "pcim_iomap_table failed\n");
249 ret = -ENOMEM;
250 goto err_pci_enable;
251 }
252
253 pdata->xgmac_regs = iomap_table[XGBE_XGMAC_BAR];
254 if (!pdata->xgmac_regs) {
255 dev_err(dev, "xgmac ioremap failed\n");
256 ret = -ENOMEM;
257 goto err_pci_enable;
258 }
259 pdata->xprop_regs = pdata->xgmac_regs + XGBE_MAC_PROP_OFFSET;
260 pdata->xi2c_regs = pdata->xgmac_regs + XGBE_I2C_CTRL_OFFSET;
261 if (netif_msg_probe(pdata)) {
262 dev_dbg(dev, "xgmac_regs = %p\n", pdata->xgmac_regs);
263 dev_dbg(dev, "xprop_regs = %p\n", pdata->xprop_regs);
264 dev_dbg(dev, "xi2c_regs = %p\n", pdata->xi2c_regs);
265 }
266
267 pdata->xpcs_regs = iomap_table[XGBE_XPCS_BAR];
268 if (!pdata->xpcs_regs) {
269 dev_err(dev, "xpcs ioremap failed\n");
270 ret = -ENOMEM;
271 goto err_pci_enable;
272 }
273 if (netif_msg_probe(pdata))
274 dev_dbg(dev, "xpcs_regs = %p\n", pdata->xpcs_regs);
275
276 /* Set the PCS indirect addressing definition registers */
277 rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0));
278 if (rdev && rdev->vendor == PCI_VENDOR_ID_AMD) {
279 switch (rdev->device) {
280 case XGBE_RV_PCI_DEVICE_ID:
281 pdata->xpcs_window_def_reg = PCS_V2_RV_WINDOW_DEF;
282 pdata->xpcs_window_sel_reg = PCS_V2_RV_WINDOW_SELECT;
283 break;
284 case XGBE_YC_PCI_DEVICE_ID:
285 pdata->xpcs_window_def_reg = PCS_V2_YC_WINDOW_DEF;
286 pdata->xpcs_window_sel_reg = PCS_V2_YC_WINDOW_SELECT;
287
288 /* Yellow Carp devices do not need cdr workaround */
289 pdata->vdata->an_cdr_workaround = 0;
290
291 /* Yellow Carp devices do not need rrc */
292 pdata->vdata->enable_rrc = 0;
293 break;
294 case XGBE_RN_PCI_DEVICE_ID:
295 pdata->xpcs_window_def_reg = PCS_V3_RN_WINDOW_DEF;
296 pdata->xpcs_window_sel_reg = PCS_V3_RN_WINDOW_SELECT;
297 break;
298 default:
299 pdata->xpcs_window_def_reg = PCS_V2_WINDOW_DEF;
300 pdata->xpcs_window_sel_reg = PCS_V2_WINDOW_SELECT;
301 break;
302 }
303 } else {
304 pdata->xpcs_window_def_reg = PCS_V2_WINDOW_DEF;
305 pdata->xpcs_window_sel_reg = PCS_V2_WINDOW_SELECT;
306 }
307 pci_dev_put(rdev);
308
309 /* Configure the PCS indirect addressing support */
310 if (pdata->vdata->xpcs_access == XGBE_XPCS_ACCESS_V3) {
311 port_addr_size = PCS_RN_PORT_ADDR_SIZE *
> 312 XP_GET_BITS(reg, XP_PROP_0, PORT_ID);
313 pdata->smn_base = PCS_RN_SMN_BASE_ADDR + port_addr_size;
314
315 address = pdata->smn_base + (pdata->xpcs_window_def_reg);
316 reg = XP_IOREAD(pdata, XP_PROP_0);
317 amd_smn_read(0, address, ®);
318 } else {
319 reg = XPCS32_IOREAD(pdata, pdata->xpcs_window_def_reg);
320 }
321
322 pdata->xpcs_window = XPCS_GET_BITS(reg, PCS_V2_WINDOW_DEF, OFFSET);
323 pdata->xpcs_window <<= 6;
324 pdata->xpcs_window_size = XPCS_GET_BITS(reg, PCS_V2_WINDOW_DEF, SIZE);
325 pdata->xpcs_window_size = 1 << (pdata->xpcs_window_size + 7);
326 pdata->xpcs_window_mask = pdata->xpcs_window_size - 1;
327 if (netif_msg_probe(pdata)) {
328 dev_dbg(dev, "xpcs window def = %#010x\n",
329 pdata->xpcs_window_def_reg);
330 dev_dbg(dev, "xpcs window sel = %#010x\n",
331 pdata->xpcs_window_sel_reg);
332 dev_dbg(dev, "xpcs window = %#010x\n",
333 pdata->xpcs_window);
334 dev_dbg(dev, "xpcs window size = %#010x\n",
335 pdata->xpcs_window_size);
336 dev_dbg(dev, "xpcs window mask = %#010x\n",
337 pdata->xpcs_window_mask);
338 }
339
340 pci_set_master(pdev);
341
342 /* Enable all interrupts in the hardware */
343 XP_IOWRITE(pdata, XP_INT_EN, 0x1fffff);
344
345 /* Retrieve the MAC address */
346 ma_lo = XP_IOREAD(pdata, XP_MAC_ADDR_LO);
347 ma_hi = XP_IOREAD(pdata, XP_MAC_ADDR_HI);
348 pdata->mac_addr[0] = ma_lo & 0xff;
349 pdata->mac_addr[1] = (ma_lo >> 8) & 0xff;
350 pdata->mac_addr[2] = (ma_lo >> 16) & 0xff;
351 pdata->mac_addr[3] = (ma_lo >> 24) & 0xff;
352 pdata->mac_addr[4] = ma_hi & 0xff;
353 pdata->mac_addr[5] = (ma_hi >> 8) & 0xff;
354 if (!XP_GET_BITS(ma_hi, XP_MAC_ADDR_HI, VALID) ||
355 !is_valid_ether_addr(pdata->mac_addr)) {
356 dev_err(dev, "invalid mac address\n");
357 ret = -EINVAL;
358 goto err_pci_enable;
359 }
360
361 /* Clock settings */
362 pdata->sysclk_rate = XGBE_V2_DMA_CLOCK_FREQ;
363 pdata->ptpclk_rate = XGBE_V2_PTP_CLOCK_FREQ;
364
365 /* Set the DMA coherency values */
366 pdata->coherent = 1;
367 pdata->arcr = XGBE_DMA_PCI_ARCR;
368 pdata->awcr = XGBE_DMA_PCI_AWCR;
369 pdata->awarcr = XGBE_DMA_PCI_AWARCR;
370
371 /* Read the port property registers */
372 pdata->pp0 = XP_IOREAD(pdata, XP_PROP_0);
373 pdata->pp1 = XP_IOREAD(pdata, XP_PROP_1);
374 pdata->pp2 = XP_IOREAD(pdata, XP_PROP_2);
375 pdata->pp3 = XP_IOREAD(pdata, XP_PROP_3);
376 pdata->pp4 = XP_IOREAD(pdata, XP_PROP_4);
377 if (netif_msg_probe(pdata)) {
378 dev_dbg(dev, "port property 0 = %#010x\n", pdata->pp0);
379 dev_dbg(dev, "port property 1 = %#010x\n", pdata->pp1);
380 dev_dbg(dev, "port property 2 = %#010x\n", pdata->pp2);
381 dev_dbg(dev, "port property 3 = %#010x\n", pdata->pp3);
382 dev_dbg(dev, "port property 4 = %#010x\n", pdata->pp4);
383 }
384
385 /* Set the maximum channels and queues */
386 pdata->tx_max_channel_count = XP_GET_BITS(pdata->pp1, XP_PROP_1,
387 MAX_TX_DMA);
388 pdata->rx_max_channel_count = XP_GET_BITS(pdata->pp1, XP_PROP_1,
389 MAX_RX_DMA);
390 pdata->tx_max_q_count = XP_GET_BITS(pdata->pp1, XP_PROP_1,
391 MAX_TX_QUEUES);
392 pdata->rx_max_q_count = XP_GET_BITS(pdata->pp1, XP_PROP_1,
393 MAX_RX_QUEUES);
394 if (netif_msg_probe(pdata)) {
395 dev_dbg(dev, "max tx/rx channel count = %u/%u\n",
396 pdata->tx_max_channel_count,
397 pdata->rx_max_channel_count);
398 dev_dbg(dev, "max tx/rx hw queue count = %u/%u\n",
399 pdata->tx_max_q_count, pdata->rx_max_q_count);
400 }
401
402 /* Set the hardware channel and queue counts */
403 xgbe_set_counts(pdata);
404
405 /* Set the maximum fifo amounts */
406 pdata->tx_max_fifo_size = XP_GET_BITS(pdata->pp2, XP_PROP_2,
407 TX_FIFO_SIZE);
408 pdata->tx_max_fifo_size *= 16384;
409 pdata->tx_max_fifo_size = min(pdata->tx_max_fifo_size,
410 pdata->vdata->tx_max_fifo_size);
411 pdata->rx_max_fifo_size = XP_GET_BITS(pdata->pp2, XP_PROP_2,
412 RX_FIFO_SIZE);
413 pdata->rx_max_fifo_size *= 16384;
414 pdata->rx_max_fifo_size = min(pdata->rx_max_fifo_size,
415 pdata->vdata->rx_max_fifo_size);
416 if (netif_msg_probe(pdata))
417 dev_dbg(dev, "max tx/rx max fifo size = %u/%u\n",
418 pdata->tx_max_fifo_size, pdata->rx_max_fifo_size);
419
420 /* Configure interrupt support */
421 ret = xgbe_config_irqs(pdata);
422 if (ret)
423 goto err_pci_enable;
424
425 /* Configure the netdev resource */
426 ret = xgbe_config_netdev(pdata);
427 if (ret)
428 goto err_irq_vectors;
429
430 netdev_notice(pdata->netdev, "net device enabled\n");
431
432 return 0;
433
434 err_irq_vectors:
435 pci_free_irq_vectors(pdata->pcidev);
436
437 err_pci_enable:
438 xgbe_free_pdata(pdata);
439
440 err_alloc:
441 dev_notice(dev, "net device not enabled\n");
442
443 return ret;
444 }
445
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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