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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/pci/hotplug/s390_pci_hpc.c
..
..
@@ -19,7 +19,6 @@
19
19
 #include <asm/sclp.h>
20
20
 
21
21
 #define SLOT_NAME_SIZE	10
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-static LIST_HEAD(s390_hotplug_slot_list);
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22
 
24
23
 static int zpci_fn_configured(enum zpci_state state)
25
24
 {
..
..
@@ -27,99 +26,90 @@
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26
 	       state == ZPCI_FN_STATE_ONLINE;
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27
 }
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28
 
30
-/*
31
- * struct slot - slot information for each *physical* slot
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- */
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-struct slot {
34
-	struct list_head slot_list;
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-	struct hotplug_slot *hotplug_slot;
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-	struct zpci_dev *zdev;
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-};
38
-
39
-static inline int slot_configure(struct slot *slot)
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+static inline int zdev_configure(struct zpci_dev *zdev)
40
30
 {
41
-	int ret = sclp_pci_configure(slot->zdev->fid);
31
+	int ret = sclp_pci_configure(zdev->fid);
42
32
 
43
-	zpci_dbg(3, "conf fid:%x, rc:%d\n", slot->zdev->fid, ret);
33
+	zpci_dbg(3, "conf fid:%x, rc:%d\n", zdev->fid, ret);
44
34
 	if (!ret)
45
-		slot->zdev->state = ZPCI_FN_STATE_CONFIGURED;
35
+		zdev->state = ZPCI_FN_STATE_CONFIGURED;
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36
 
47
37
 	return ret;
48
38
 }
49
39
 
50
-static inline int slot_deconfigure(struct slot *slot)
40
+static inline int zdev_deconfigure(struct zpci_dev *zdev)
51
41
 {
52
-	int ret = sclp_pci_deconfigure(slot->zdev->fid);
42
+	int ret = sclp_pci_deconfigure(zdev->fid);
53
43
 
54
-	zpci_dbg(3, "deconf fid:%x, rc:%d\n", slot->zdev->fid, ret);
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+	zpci_dbg(3, "deconf fid:%x, rc:%d\n", zdev->fid, ret);
55
45
 	if (!ret)
56
-		slot->zdev->state = ZPCI_FN_STATE_STANDBY;
46
+		zdev->state = ZPCI_FN_STATE_STANDBY;
57
47
 
58
48
 	return ret;
59
49
 }
60
50
 
61
51
 static int enable_slot(struct hotplug_slot *hotplug_slot)
62
52
 {
63
-	struct slot *slot = hotplug_slot->private;
53
+	struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev,
54
+					     hotplug_slot);
55
+	struct zpci_bus *zbus = zdev->zbus;
64
56
 	int rc;
65
57
 
66
-	if (slot->zdev->state != ZPCI_FN_STATE_STANDBY)
58
+	if (zdev->state != ZPCI_FN_STATE_STANDBY)
67
59
 		return -EIO;
68
60
 
69
-	rc = slot_configure(slot);
61
+	rc = zdev_configure(zdev);
70
62
 	if (rc)
71
63
 		return rc;
72
64
 
73
-	rc = zpci_enable_device(slot->zdev);
65
+	rc = zpci_enable_device(zdev);
74
66
 	if (rc)
75
67
 		goto out_deconfigure;
76
68
 
77
-	pci_scan_slot(slot->zdev->bus, ZPCI_DEVFN);
69
+	pci_scan_slot(zbus->bus, zdev->devfn);
78
70
 	pci_lock_rescan_remove();
79
-	pci_bus_add_devices(slot->zdev->bus);
71
+	pci_bus_add_devices(zbus->bus);
80
72
 	pci_unlock_rescan_remove();
81
73
 
82
74
 	return rc;
83
75
 
84
76
 out_deconfigure:
85
-	slot_deconfigure(slot);
77
+	zdev_deconfigure(zdev);
86
78
 	return rc;
87
79
 }
88
80
 
89
81
 static int disable_slot(struct hotplug_slot *hotplug_slot)
90
82
 {
91
-	struct slot *slot = hotplug_slot->private;
83
+	struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev,
84
+					     hotplug_slot);
92
85
 	struct pci_dev *pdev;
93
86
 	int rc;
94
87
 
95
-	if (!zpci_fn_configured(slot->zdev->state))
88
+	if (!zpci_fn_configured(zdev->state))
96
89
 		return -EIO;
97
90
 
98
-	pdev = pci_get_slot(slot->zdev->bus, ZPCI_DEVFN);
99
-	if (pdev) {
100
-		pci_stop_and_remove_bus_device_locked(pdev);
91
+	pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
92
+	if (pdev && pci_num_vf(pdev)) {
101
93
 		pci_dev_put(pdev);
94
+		return -EBUSY;
102
95
 	}
96
+	pci_dev_put(pdev);
103
97
 
104
-	rc = zpci_disable_device(slot->zdev);
98
+	zpci_remove_device(zdev, false);
99
+
100
+	rc = zpci_disable_device(zdev);
105
101
 	if (rc)
106
102
 		return rc;
107
103
 
108
-	return slot_deconfigure(slot);
104
+	return zdev_deconfigure(zdev);
109
105
 }
110
106
 
111
107
 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
112
108
 {
113
-	struct slot *slot = hotplug_slot->private;
109
+	struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev,
110
+					     hotplug_slot);
114
111
 
115
-	switch (slot->zdev->state) {
116
-	case ZPCI_FN_STATE_STANDBY:
117
-		*value = 0;
118
-		break;
119
-	default:
120
-		*value = 1;
121
-		break;
122
-	}
112
+	*value = zpci_is_device_configured(zdev) ? 1 : 0;
123
113
 	return 0;
124
114
 }
125
115
 
..
..
@@ -130,7 +120,7 @@
130
120
 	return 0;
131
121
 }
132
122
 
133
-static struct hotplug_slot_ops s390_hotplug_slot_ops = {
123
+static const struct hotplug_slot_ops s390_hotplug_slot_ops = {
134
124
 	.enable_slot =		enable_slot,
135
125
 	.disable_slot =		disable_slot,
136
126
 	.get_power_status =	get_power_status,
..
..
@@ -139,68 +129,17 @@
139
129
 
140
130
 int zpci_init_slot(struct zpci_dev *zdev)
141
131
 {
142
-	struct hotplug_slot *hotplug_slot;
143
-	struct hotplug_slot_info *info;
144
132
 	char name[SLOT_NAME_SIZE];
145
-	struct slot *slot;
146
-	int rc;
133
+	struct zpci_bus *zbus = zdev->zbus;
147
134
 
148
-	if (!zdev)
149
-		return 0;
150
-
151
-	slot = kzalloc(sizeof(*slot), GFP_KERNEL);
152
-	if (!slot)
153
-		goto error;
154
-
155
-	hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
156
-	if (!hotplug_slot)
157
-		goto error_hp;
158
-	hotplug_slot->private = slot;
159
-
160
-	slot->hotplug_slot = hotplug_slot;
161
-	slot->zdev = zdev;
162
-
163
-	info = kzalloc(sizeof(*info), GFP_KERNEL);
164
-	if (!info)
165
-		goto error_info;
166
-	hotplug_slot->info = info;
167
-
168
-	hotplug_slot->ops = &s390_hotplug_slot_ops;
169
-
170
-	get_power_status(hotplug_slot, &info->power_status);
171
-	get_adapter_status(hotplug_slot, &info->adapter_status);
135
+	zdev->hotplug_slot.ops = &s390_hotplug_slot_ops;
172
136
 
173
137
 	snprintf(name, SLOT_NAME_SIZE, "%08x", zdev->fid);
174
-	rc = pci_hp_register(slot->hotplug_slot, zdev->bus,
175
-			     ZPCI_DEVFN, name);
176
-	if (rc)
177
-		goto error_reg;
178
-
179
-	list_add(&slot->slot_list, &s390_hotplug_slot_list);
180
-	return 0;
181
-
182
-error_reg:
183
-	kfree(info);
184
-error_info:
185
-	kfree(hotplug_slot);
186
-error_hp:
187
-	kfree(slot);
188
-error:
189
-	return -ENOMEM;
138
+	return pci_hp_register(&zdev->hotplug_slot, zbus->bus,
139
+			       zdev->devfn, name);
190
140
 }
191
141
 
192
142
 void zpci_exit_slot(struct zpci_dev *zdev)
193
143
 {
194
-	struct slot *slot, *next;
195
-
196
-	list_for_each_entry_safe(slot, next, &s390_hotplug_slot_list,
197
-				 slot_list) {
198
-		if (slot->zdev != zdev)
199
-			continue;
200
-		list_del(&slot->slot_list);
201
-		pci_hp_deregister(slot->hotplug_slot);
202
-		kfree(slot->hotplug_slot->info);
203
-		kfree(slot->hotplug_slot);
204
-		kfree(slot);
205
-	}
144
+	pci_hp_deregister(&zdev->hotplug_slot);
206
145
 }