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2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da 
 kernel/drivers/net/ethernet/cavium/thunder/nic_main.c
....@@ -1,9 +1,6 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Copyright (C) 2015 Cavium, Inc.
3
- *
4
- * This program is free software; you can redistribute it and/or modify it
5
- * under the terms of version 2 of the GNU General Public License
6
- * as published by the Free Software Foundation.
74  */
85 
96 #include <linux/module.h>
....@@ -57,14 +54,8 @@
5754 #define	NIC_GET_BGX_FROM_VF_LMAC_MAP(map)	((map >> 4) & 0xF)
5855 #define	NIC_GET_LMAC_FROM_VF_LMAC_MAP(map)	(map & 0xF)
5956 	u8			*vf_lmac_map;
60
-	struct delayed_work     dwork;
61
-	struct workqueue_struct *check_link;
62
-	u8			*link;
63
-	u8			*duplex;
64
-	u32			*speed;
6557 	u16			cpi_base[MAX_NUM_VFS_SUPPORTED];
6658 	u16			rssi_base[MAX_NUM_VFS_SUPPORTED];
67
-	bool			mbx_lock[MAX_NUM_VFS_SUPPORTED];
6859 
6960 	/* MSI-X */
7061 	u8			num_vec;
....@@ -929,6 +920,35 @@
929920 	nic_reg_write(nic, NIC_PF_PKIND_0_15_CFG | (pkind_idx << 3), pkind_val);
930921 }
931922 
923
+/* Get BGX LMAC link status and update corresponding VF
924
+ * if there is a change, valid only if internal L2 switch
925
+ * is not present otherwise VF link is always treated as up
926
+ */
927
+static void nic_link_status_get(struct nicpf *nic, u8 vf)
928
+{
929
+	union nic_mbx mbx = {};
930
+	struct bgx_link_status link;
931
+	u8 bgx, lmac;
932
+
933
+	mbx.link_status.msg = NIC_MBOX_MSG_BGX_LINK_CHANGE;
934
+
935
+	/* Get BGX, LMAC indices for the VF */
936
+	bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
937
+	lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
938
+
939
+	/* Get interface link status */
940
+	bgx_get_lmac_link_state(nic->node, bgx, lmac, &link);
941
+
942
+	/* Send a mbox message to VF with current link status */
943
+	mbx.link_status.link_up = link.link_up;
944
+	mbx.link_status.duplex = link.duplex;
945
+	mbx.link_status.speed = link.speed;
946
+	mbx.link_status.mac_type = link.mac_type;
947
+
948
+	/* reply with link status */
949
+	nic_send_msg_to_vf(nic, vf, &mbx);
950
+}
951
+
932952 /* Interrupt handler to handle mailbox messages from VFs */
933953 static void nic_handle_mbx_intr(struct nicpf *nic, int vf)
934954 {
....@@ -940,8 +960,6 @@
940960 	int bgx, lmac;
941961 	int i;
942962 	int ret = 0;
943
-
944
-	nic->mbx_lock[vf] = true;
945963 
946964 	mbx_addr = nic_get_mbx_addr(vf);
947965 	mbx_data = (u64 *)&mbx;
....@@ -957,12 +975,7 @@
957975 	switch (mbx.msg.msg) {
958976 	case NIC_MBOX_MSG_READY:
959977 		nic_mbx_send_ready(nic, vf);
960
-		if (vf < nic->num_vf_en) {
961
-			nic->link[vf] = 0;
962
-			nic->duplex[vf] = 0;
963
-			nic->speed[vf] = 0;
964
-		}
965
-		goto unlock;
978
+		return;
966979 	case NIC_MBOX_MSG_QS_CFG:
967980 		reg_addr = NIC_PF_QSET_0_127_CFG |
968981 			   (mbx.qs.num << NIC_QS_ID_SHIFT);
....@@ -1031,7 +1044,7 @@
10311044 		break;
10321045 	case NIC_MBOX_MSG_RSS_SIZE:
10331046 		nic_send_rss_size(nic, vf);
1034
-		goto unlock;
1047
+		return;
10351048 	case NIC_MBOX_MSG_RSS_CFG:
10361049 	case NIC_MBOX_MSG_RSS_CFG_CONT:
10371050 		nic_config_rss(nic, &mbx.rss_cfg);
....@@ -1049,19 +1062,19 @@
10491062 		break;
10501063 	case NIC_MBOX_MSG_ALLOC_SQS:
10511064 		nic_alloc_sqs(nic, &mbx.sqs_alloc);
1052
-		goto unlock;
1065
+		return;
10531066 	case NIC_MBOX_MSG_NICVF_PTR:
10541067 		nic->nicvf[vf] = mbx.nicvf.nicvf;
10551068 		break;
10561069 	case NIC_MBOX_MSG_PNICVF_PTR:
10571070 		nic_send_pnicvf(nic, vf);
1058
-		goto unlock;
1071
+		return;
10591072 	case NIC_MBOX_MSG_SNICVF_PTR:
10601073 		nic_send_snicvf(nic, &mbx.nicvf);
1061
-		goto unlock;
1074
+		return;
10621075 	case NIC_MBOX_MSG_BGX_STATS:
10631076 		nic_get_bgx_stats(nic, &mbx.bgx_stats);
1064
-		goto unlock;
1077
+		return;
10651078 	case NIC_MBOX_MSG_LOOPBACK:
10661079 		ret = nic_config_loopback(nic, &mbx.lbk);
10671080 		break;
....@@ -1070,7 +1083,7 @@
10701083 		break;
10711084 	case NIC_MBOX_MSG_PFC:
10721085 		nic_pause_frame(nic, vf, &mbx.pfc);
1073
-		goto unlock;
1086
+		return;
10741087 	case NIC_MBOX_MSG_PTP_CFG:
10751088 		nic_config_timestamp(nic, vf, &mbx.ptp);
10761089 		break;
....@@ -1094,7 +1107,7 @@
10941107 		bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
10951108 		lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
10961109 		bgx_set_dmac_cam_filter(nic->node, bgx, lmac,
1097
-					mbx.xcast.data.mac,
1110
+					mbx.xcast.mac,
10981111 					vf < NIC_VF_PER_MBX_REG ? vf :
10991112 					vf - NIC_VF_PER_MBX_REG);
11001113 		break;
....@@ -1106,8 +1119,15 @@
11061119 		}
11071120 		bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
11081121 		lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
1109
-		bgx_set_xcast_mode(nic->node, bgx, lmac, mbx.xcast.data.mode);
1122
+		bgx_set_xcast_mode(nic->node, bgx, lmac, mbx.xcast.mode);
11101123 		break;
1124
+	case NIC_MBOX_MSG_BGX_LINK_CHANGE:
1125
+		if (vf >= nic->num_vf_en) {
1126
+			ret = -1; /* NACK */
1127
+			break;
1128
+		}
1129
+		nic_link_status_get(nic, vf);
1130
+		return;
11111131 	default:
11121132 		dev_err(&nic->pdev->dev,
11131133 			"Invalid msg from VF%d, msg 0x%x\n", vf, mbx.msg.msg);
....@@ -1121,8 +1141,6 @@
11211141 			mbx.msg.msg, vf);
11221142 		nic_mbx_send_nack(nic, vf);
11231143 	}
1124
-unlock:
1125
-	nic->mbx_lock[vf] = false;
11261144 }
11271145 
11281146 static irqreturn_t nic_mbx_intr_handler(int irq, void *nic_irq)
....@@ -1270,52 +1288,6 @@
12701288 	return 0;
12711289 }
12721290 
1273
-/* Poll for BGX LMAC link status and update corresponding VF
1274
- * if there is a change, valid only if internal L2 switch
1275
- * is not present otherwise VF link is always treated as up
1276
- */
1277
-static void nic_poll_for_link(struct work_struct *work)
1278
-{
1279
-	union nic_mbx mbx = {};
1280
-	struct nicpf *nic;
1281
-	struct bgx_link_status link;
1282
-	u8 vf, bgx, lmac;
1283
-
1284
-	nic = container_of(work, struct nicpf, dwork.work);
1285
-
1286
-	mbx.link_status.msg = NIC_MBOX_MSG_BGX_LINK_CHANGE;
1287
-
1288
-	for (vf = 0; vf < nic->num_vf_en; vf++) {
1289
-		/* Poll only if VF is UP */
1290
-		if (!nic->vf_enabled[vf])
1291
-			continue;
1292
-
1293
-		/* Get BGX, LMAC indices for the VF */
1294
-		bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
1295
-		lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
1296
-		/* Get interface link status */
1297
-		bgx_get_lmac_link_state(nic->node, bgx, lmac, &link);
1298
-
1299
-		/* Inform VF only if link status changed */
1300
-		if (nic->link[vf] == link.link_up)
1301
-			continue;
1302
-
1303
-		if (!nic->mbx_lock[vf]) {
1304
-			nic->link[vf] = link.link_up;
1305
-			nic->duplex[vf] = link.duplex;
1306
-			nic->speed[vf] = link.speed;
1307
-
1308
-			/* Send a mbox message to VF with current link status */
1309
-			mbx.link_status.link_up = link.link_up;
1310
-			mbx.link_status.duplex = link.duplex;
1311
-			mbx.link_status.speed = link.speed;
1312
-			mbx.link_status.mac_type = link.mac_type;
1313
-			nic_send_msg_to_vf(nic, vf, &mbx);
1314
-		}
1315
-	}
1316
-	queue_delayed_work(nic->check_link, &nic->dwork, HZ * 2);
1317
-}
1318
-
13191291 static int nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
13201292 {
13211293 	struct device *dev = &pdev->dev;
....@@ -1384,18 +1356,6 @@
13841356 	if (!nic->vf_lmac_map)
13851357 		goto err_release_regions;
13861358 
1387
-	nic->link = devm_kmalloc_array(dev, max_lmac, sizeof(u8), GFP_KERNEL);
1388
-	if (!nic->link)
1389
-		goto err_release_regions;
1390
-
1391
-	nic->duplex = devm_kmalloc_array(dev, max_lmac, sizeof(u8), GFP_KERNEL);
1392
-	if (!nic->duplex)
1393
-		goto err_release_regions;
1394
-
1395
-	nic->speed = devm_kmalloc_array(dev, max_lmac, sizeof(u32), GFP_KERNEL);
1396
-	if (!nic->speed)
1397
-		goto err_release_regions;
1398
-
13991359 	/* Initialize hardware */
14001360 	nic_init_hw(nic);
14011361 
....@@ -1411,22 +1371,8 @@
14111371 	if (err)
14121372 		goto err_unregister_interrupts;
14131373 
1414
-	/* Register a physical link status poll fn() */
1415
-	nic->check_link = alloc_workqueue("check_link_status",
1416
-					  WQ_UNBOUND | WQ_MEM_RECLAIM, 1);
1417
-	if (!nic->check_link) {
1418
-		err = -ENOMEM;
1419
-		goto err_disable_sriov;
1420
-	}
1421
-
1422
-	INIT_DELAYED_WORK(&nic->dwork, nic_poll_for_link);
1423
-	queue_delayed_work(nic->check_link, &nic->dwork, 0);
1424
-
14251374 	return 0;
14261375 
1427
-err_disable_sriov:
1428
-	if (nic->flags & NIC_SRIOV_ENABLED)
1429
-		pci_disable_sriov(pdev);
14301376 err_unregister_interrupts:
14311377 	nic_unregister_interrupts(nic);
14321378 err_release_regions:
....@@ -1446,12 +1392,6 @@
14461392 
14471393 	if (nic->flags & NIC_SRIOV_ENABLED)
14481394 		pci_disable_sriov(pdev);
1449
-
1450
-	if (nic->check_link) {
1451
-		/* Destroy work Queue */
1452
-		cancel_delayed_work_sync(&nic->dwork);
1453
-		destroy_workqueue(nic->check_link);
1454
-	}
14551395 
14561396 	nic_unregister_interrupts(nic);
14571397 	pci_release_regions(pdev);