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2024-05-11 297b60346df8beafee954a0fd7c2d64f33f3b9bc 
 kernel/drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.c
....@@ -1,35 +1,5 @@
1
-/*
2
- * Copyright (C) 2015-2017 Netronome Systems, Inc.
3
- *
4
- * This software is dual licensed under the GNU General License Version 2,
5
- * June 1991 as shown in the file COPYING in the top-level directory of this
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- * source tree or the BSD 2-Clause License provided below.  You have the
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- * option to license this software under the complete terms of either license.
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- *
9
- * The BSD 2-Clause License:
10
- *
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- *     Redistribution and use in source and binary forms, with or
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- *     without modification, are permitted provided that the following
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- *     conditions are met:
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- *
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- *      1. Redistributions of source code must retain the above
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- *         copyright notice, this list of conditions and the following
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- *         disclaimer.
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- *
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- *      2. Redistributions in binary form must reproduce the above
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- *         copyright notice, this list of conditions and the following
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- *         disclaimer in the documentation and/or other materials
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- *         provided with the distribution.
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- *
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- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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- * SOFTWARE.
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- */
1
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2
+/* Copyright (C) 2015-2018 Netronome Systems, Inc. */
333 
344 /*
355  * nfp6000_pcie.c
....@@ -138,6 +108,7 @@
138108 
139109 /* The number of explicit BARs to reserve.
140110  * Minimum is 0, maximum is 4 on the NFP6000.
111
+ * The NFP3800 can have only one per PF.
141112  */
142113 #define NFP_PCIE_EXPLICIT_BARS		2
143114 
....@@ -369,12 +340,12 @@
369340 	switch (maptype) {
370341 	case NFP_PCIE_BAR_PCIE2CPP_MapType_TARGET:
371342 		bartok = -1;
372
-		/* FALLTHROUGH */
343
+		fallthrough;
373344 	case NFP_PCIE_BAR_PCIE2CPP_MapType_BULK:
374345 		baract = NFP_CPP_ACTION_RW;
375346 		if (act == 0)
376347 			act = NFP_CPP_ACTION_RW;
377
-		/* FALLTHROUGH */
348
+		fallthrough;
378349 	case NFP_PCIE_BAR_PCIE2CPP_MapType_FIXED:
379350 		break;
380351 	default:
....@@ -589,8 +560,8 @@
589560 			NFP_PCIE_BAR_PCIE2CPP_MapType_EXPLICIT3),
590561 	};
591562 	char status_msg[196] = {};
563
+	int i, err, bars_free;
592564 	struct nfp_bar *bar;
593
-	int i, bars_free;
594565 	int expl_groups;
595566 	char *msg, *end;
596567 
....@@ -640,10 +611,12 @@
640611 	/* Configure, and lock, BAR0.0 for General Target use (MSI-X SRAM) */
641612 	bar = &nfp->bar[0];
642613 	if (nfp_bar_resource_len(bar) >= NFP_PCI_MIN_MAP_SIZE)
643
-		bar->iomem = ioremap_nocache(nfp_bar_resource_start(bar),
614
+		bar->iomem = ioremap(nfp_bar_resource_start(bar),
644615 					     nfp_bar_resource_len(bar));
645616 	if (bar->iomem) {
646
-		msg += snprintf(msg, end - msg,	"0.0: General/MSI-X SRAM, ");
617
+		int pf;
618
+
619
+		msg += scnprintf(msg, end - msg, "0.0: General/MSI-X SRAM, ");
647620 		atomic_inc(&bar->refcnt);
648621 		bars_free--;
649622 
....@@ -651,26 +624,44 @@
651624 
652625 		nfp->expl.data = bar->iomem + NFP_PCIE_SRAM + 0x1000;
653626 
654
-		if (nfp->pdev->device == PCI_DEVICE_ID_NETRONOME_NFP4000 ||
655
-		    nfp->pdev->device == PCI_DEVICE_ID_NETRONOME_NFP6000) {
656
-			nfp->iomem.csr = bar->iomem + NFP_PCIE_BAR(0);
657
-		} else {
658
-			int pf = nfp->pdev->devfn & 7;
659
-
627
+		switch (nfp->pdev->device) {
628
+		case PCI_DEVICE_ID_NETRONOME_NFP3800:
629
+			pf = nfp->pdev->devfn & 7;
660630 			nfp->iomem.csr = bar->iomem + NFP_PCIE_BAR(pf);
631
+			break;
632
+		case PCI_DEVICE_ID_NETRONOME_NFP4000:
633
+		case PCI_DEVICE_ID_NETRONOME_NFP5000:
634
+		case PCI_DEVICE_ID_NETRONOME_NFP6000:
635
+			nfp->iomem.csr = bar->iomem + NFP_PCIE_BAR(0);
636
+			break;
637
+		default:
638
+			dev_err(nfp->dev, "Unsupported device ID: %04hx!\n",
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+				nfp->pdev->device);
640
+			err = -EINVAL;
641
+			goto err_unmap_bar0;
661642 		}
662643 		nfp->iomem.em = bar->iomem + NFP_PCIE_EM;
663644 	}
664645 
665
-	if (nfp->pdev->device == PCI_DEVICE_ID_NETRONOME_NFP4000 ||
666
-	    nfp->pdev->device == PCI_DEVICE_ID_NETRONOME_NFP6000)
667
-		expl_groups = 4;
668
-	else
646
+	switch (nfp->pdev->device) {
647
+	case PCI_DEVICE_ID_NETRONOME_NFP3800:
669648 		expl_groups = 1;
649
+		break;
650
+	case PCI_DEVICE_ID_NETRONOME_NFP4000:
651
+	case PCI_DEVICE_ID_NETRONOME_NFP5000:
652
+	case PCI_DEVICE_ID_NETRONOME_NFP6000:
653
+		expl_groups = 4;
654
+		break;
655
+	default:
656
+		dev_err(nfp->dev, "Unsupported device ID: %04hx!\n",
657
+			nfp->pdev->device);
658
+		err = -EINVAL;
659
+		goto err_unmap_bar0;
660
+	}
670661 
671662 	/* Configure, and lock, BAR0.1 for PCIe XPB (MSI-X PBA) */
672663 	bar = &nfp->bar[1];
673
-	msg += snprintf(msg, end - msg, "0.1: PCIe XPB/MSI-X PBA, ");
664
+	msg += scnprintf(msg, end - msg, "0.1: PCIe XPB/MSI-X PBA, ");
674665 	atomic_inc(&bar->refcnt);
675666 	bars_free--;
676667 
....@@ -686,11 +677,11 @@
686677 		}
687678 
688679 		bar = &nfp->bar[4 + i];
689
-		bar->iomem = ioremap_nocache(nfp_bar_resource_start(bar),
680
+		bar->iomem = ioremap(nfp_bar_resource_start(bar),
690681 					     nfp_bar_resource_len(bar));
691682 		if (bar->iomem) {
692
-			msg += snprintf(msg, end - msg,
693
-					"0.%d: Explicit%d, ", 4 + i, i);
683
+			msg += scnprintf(msg, end - msg,
684
+					 "0.%d: Explicit%d, ", 4 + i, i);
694685 			atomic_inc(&bar->refcnt);
695686 			bars_free--;
696687 
....@@ -711,6 +702,11 @@
711702 	dev_info(nfp->dev, "%sfree: %d/%d\n", status_msg, bars_free, nfp->bars);
712703 
713704 	return 0;
705
+
706
+err_unmap_bar0:
707
+	if (nfp->bar[0].iomem)
708
+		iounmap(nfp->bar[0].iomem);
709
+	return err;
714710 }
715711 
716712 static void disable_bars(struct nfp6000_pcie *nfp)
....@@ -862,7 +858,7 @@
862858 		priv->iomem = priv->bar->iomem + priv->bar_offset;
863859 	else
864860 		/* Must have been too big. Sub-allocate. */
865
-		priv->iomem = ioremap_nocache(priv->phys, priv->size);
861
+		priv->iomem = ioremap(priv->phys, priv->size);
866862 
867863 	if (IS_ERR_OR_NULL(priv->iomem)) {
868864 		dev_err(nfp->dev, "Can't ioremap() a %d byte region of BAR %d\n",
....@@ -1251,19 +1247,16 @@
12511247 static int nfp6000_read_serial(struct device *dev, u8 *serial)
12521248 {
12531249 	struct pci_dev *pdev = to_pci_dev(dev);
1254
-	int pos;
1255
-	u32 reg;
1250
+	u64 dsn;
12561251 
1257
-	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DSN);
1258
-	if (!pos) {
1252
+	dsn = pci_get_dsn(pdev);
1253
+	if (!dsn) {
12591254 		dev_err(dev, "can't find PCIe Serial Number Capability\n");
12601255 		return -EINVAL;
12611256 	}
12621257 
1263
-	pci_read_config_dword(pdev, pos + 4, &reg);
1264
-	put_unaligned_be16(reg >> 16, serial + 4);
1265
-	pci_read_config_dword(pdev, pos + 8, &reg);
1266
-	put_unaligned_be32(reg, serial);
1258
+	put_unaligned_be32((u32)(dsn >> 32), serial);
1259
+	put_unaligned_be16((u16)(dsn >> 16), serial + 4);
12671260 
12681261 	return 0;
12691262 }
....@@ -1271,18 +1264,15 @@
12711264 static int nfp6000_get_interface(struct device *dev)
12721265 {
12731266 	struct pci_dev *pdev = to_pci_dev(dev);
1274
-	int pos;
1275
-	u32 reg;
1267
+	u64 dsn;
12761268 
1277
-	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DSN);
1278
-	if (!pos) {
1269
+	dsn = pci_get_dsn(pdev);
1270
+	if (!dsn) {
12791271 		dev_err(dev, "can't find PCIe Serial Number Capability\n");
12801272 		return -EINVAL;
12811273 	}
12821274 
1283
-	pci_read_config_dword(pdev, pos + 4, &reg);
1284
-
1285
-	return reg & 0xffff;
1275
+	return dsn & 0xffff;
12861276 }
12871277 
12881278 static const struct nfp_cpp_operations nfp6000_pcie_ops = {
....@@ -1327,7 +1317,7 @@
13271317 
13281318 	/*  Finished with card initialization. */
13291319 	dev_info(&pdev->dev,
1330
-		 "Netronome Flow Processor NFP4000/NFP6000 PCIe Card Probe\n");
1320
+		 "Netronome Flow Processor NFP4000/NFP5000/NFP6000 PCIe Card Probe\n");
13311321 	pcie_print_link_status(pdev);
13321322 
13331323 	nfp = kzalloc(sizeof(*nfp), GFP_KERNEL);