add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/drivers/misc/ocxl/sysfs.c
..
..
@@ -3,11 +3,18 @@
3
3
 #include <linux/sysfs.h>
4
4
 #include "ocxl_internal.h"
5
5
 
6
+static inline struct ocxl_afu *to_afu(struct device *device)
7
+{
8
+	struct ocxl_file_info *info = container_of(device, struct ocxl_file_info, dev);
9
+
10
+	return info->afu;
11
+}
12
+
6
13
 static ssize_t global_mmio_size_show(struct device *device,
7
14
 				struct device_attribute *attr,
8
15
 				char *buf)
9
16
 {
10
-	struct ocxl_afu *afu = to_ocxl_afu(device);
17
+	struct ocxl_afu *afu = to_afu(device);
11
18
 
12
19
 	return scnprintf(buf, PAGE_SIZE, "%d\n",
13
20
 			afu->config.global_mmio_size);
..
..
@@ -17,7 +24,7 @@
17
24
 				struct device_attribute *attr,
18
25
 				char *buf)
19
26
 {
20
-	struct ocxl_afu *afu = to_ocxl_afu(device);
27
+	struct ocxl_afu *afu = to_afu(device);
21
28
 
22
29
 	return scnprintf(buf, PAGE_SIZE, "%d\n",
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30
 			afu->config.pp_mmio_stride);
..
..
@@ -27,7 +34,7 @@
27
34
 				struct device_attribute *attr,
28
35
 				char *buf)
29
36
 {
30
-	struct ocxl_afu *afu = to_ocxl_afu(device);
37
+	struct ocxl_afu *afu = to_afu(device);
31
38
 
32
39
 	return scnprintf(buf, PAGE_SIZE, "%hhu:%hhu\n",
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40
 			afu->config.version_major,
..
..
@@ -38,10 +45,44 @@
38
45
 		struct device_attribute *attr,
39
46
 		char *buf)
40
47
 {
41
-	struct ocxl_afu *afu = to_ocxl_afu(device);
48
+	struct ocxl_afu *afu = to_afu(device);
42
49
 
43
50
 	return scnprintf(buf, PAGE_SIZE, "%d/%d\n",
44
51
 			afu->pasid_count, afu->pasid_max);
52
+}
53
+
54
+static ssize_t reload_on_reset_show(struct device *device,
55
+				    struct device_attribute *attr,
56
+				    char *buf)
57
+{
58
+	struct ocxl_afu *afu = to_afu(device);
59
+	struct ocxl_fn *fn = afu->fn;
60
+	struct pci_dev *pci_dev = to_pci_dev(fn->dev.parent);
61
+	int val;
62
+
63
+	if (ocxl_config_get_reset_reload(pci_dev, &val))
64
+		return scnprintf(buf, PAGE_SIZE, "unavailable\n");
65
+
66
+	return scnprintf(buf, PAGE_SIZE, "%d\n", val);
67
+}
68
+
69
+static ssize_t reload_on_reset_store(struct device *device,
70
+				     struct device_attribute *attr,
71
+				     const char *buf, size_t count)
72
+{
73
+	struct ocxl_afu *afu = to_afu(device);
74
+	struct ocxl_fn *fn = afu->fn;
75
+	struct pci_dev *pci_dev = to_pci_dev(fn->dev.parent);
76
+	int rc, val;
77
+
78
+	rc = kstrtoint(buf, 0, &val);
79
+	if (rc || (val != 0 && val != 1))
80
+		return -EINVAL;
81
+
82
+	if (ocxl_config_set_reset_reload(pci_dev, val))
83
+		return -ENODEV;
84
+
85
+	return count;
45
86
 }
46
87
 
47
88
 static struct device_attribute afu_attrs[] = {
..
..
@@ -49,13 +90,14 @@
49
90
 	__ATTR_RO(pp_mmio_size),
50
91
 	__ATTR_RO(afu_version),
51
92
 	__ATTR_RO(contexts),
93
+	__ATTR_RW(reload_on_reset),
52
94
 };
53
95
 
54
96
 static ssize_t global_mmio_read(struct file *filp, struct kobject *kobj,
55
97
 				struct bin_attribute *bin_attr, char *buf,
56
98
 				loff_t off, size_t count)
57
99
 {
58
-	struct ocxl_afu *afu = to_ocxl_afu(kobj_to_dev(kobj));
100
+	struct ocxl_afu *afu = to_afu(kobj_to_dev(kobj));
59
101
 
60
102
 	if (count == 0 || off < 0 ||
61
103
 		off >= afu->config.global_mmio_size)
..
..
@@ -86,7 +128,7 @@
86
128
 			struct bin_attribute *bin_attr,
87
129
 			struct vm_area_struct *vma)
88
130
 {
89
-	struct ocxl_afu *afu = to_ocxl_afu(kobj_to_dev(kobj));
131
+	struct ocxl_afu *afu = to_afu(kobj_to_dev(kobj));
90
132
 
91
133
 	if ((vma_pages(vma) + vma->vm_pgoff) >
92
134
 		(afu->config.global_mmio_size >> PAGE_SHIFT))
..
..
@@ -99,27 +141,25 @@
99
141
 	return 0;
100
142
 }
101
143
 
102
-int ocxl_sysfs_add_afu(struct ocxl_afu *afu)
144
+int ocxl_sysfs_register_afu(struct ocxl_file_info *info)
103
145
 {
104
146
 	int i, rc;
105
147
 
106
148
 	for (i = 0; i < ARRAY_SIZE(afu_attrs); i++) {
107
-		rc = device_create_file(&afu->dev, &afu_attrs[i]);
149
+		rc = device_create_file(&info->dev, &afu_attrs[i]);
108
150
 		if (rc)
109
151
 			goto err;
110
152
 	}
111
153
 
112
-	sysfs_attr_init(&afu->attr_global_mmio.attr);
113
-	afu->attr_global_mmio.attr.name = "global_mmio_area";
114
-	afu->attr_global_mmio.attr.mode = 0600;
115
-	afu->attr_global_mmio.size = afu->config.global_mmio_size;
116
-	afu->attr_global_mmio.read = global_mmio_read;
117
-	afu->attr_global_mmio.mmap = global_mmio_mmap;
118
-	rc = device_create_bin_file(&afu->dev, &afu->attr_global_mmio);
154
+	sysfs_attr_init(&info->attr_global_mmio.attr);
155
+	info->attr_global_mmio.attr.name = "global_mmio_area";
156
+	info->attr_global_mmio.attr.mode = 0600;
157
+	info->attr_global_mmio.size = info->afu->config.global_mmio_size;
158
+	info->attr_global_mmio.read = global_mmio_read;
159
+	info->attr_global_mmio.mmap = global_mmio_mmap;
160
+	rc = device_create_bin_file(&info->dev, &info->attr_global_mmio);
119
161
 	if (rc) {
120
-		dev_err(&afu->dev,
121
-			"Unable to create global mmio attr for afu: %d\n",
122
-			rc);
162
+		dev_err(&info->dev, "Unable to create global mmio attr for afu: %d\n", rc);
123
163
 		goto err;
124
164
 	}
125
165
 
..
..
@@ -127,15 +167,20 @@
127
167
 
128
168
 err:
129
169
 	for (i--; i >= 0; i--)
130
-		device_remove_file(&afu->dev, &afu_attrs[i]);
170
+		device_remove_file(&info->dev, &afu_attrs[i]);
171
+
131
172
 	return rc;
132
173
 }
133
174
 
134
-void ocxl_sysfs_remove_afu(struct ocxl_afu *afu)
175
+void ocxl_sysfs_unregister_afu(struct ocxl_file_info *info)
135
176
 {
136
177
 	int i;
137
178
 
179
+	/*
180
+	 * device_remove_bin_file is safe to call if the file is not added as
181
+	 * the files are removed by name, and early exit if not found
182
+	 */
138
183
 	for (i = 0; i < ARRAY_SIZE(afu_attrs); i++)
139
-		device_remove_file(&afu->dev, &afu_attrs[i]);
140
-	device_remove_bin_file(&afu->dev, &afu->attr_global_mmio);
184
+		device_remove_file(&info->dev, &afu_attrs[i]);
185
+	device_remove_bin_file(&info->dev, &info->attr_global_mmio);
141
186
 }