enable tun/tap/iptables

hc

2024-05-10 ee930fffee469d076998274a2ca55e13dc1efb67

 kernel/drivers/misc/ocxl/sysfs.c
..
..
@@ -3,11 +3,18 @@
3
3
 #include <linux/sysfs.h>
4
4
 #include "ocxl_internal.h"
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5
 
6
+static inline struct ocxl_afu *to_afu(struct device *device)
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+{
8
+	struct ocxl_file_info *info = container_of(device, struct ocxl_file_info, dev);
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+
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+	return info->afu;
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+}
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+
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13
 static ssize_t global_mmio_size_show(struct device *device,
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14
 				struct device_attribute *attr,
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15
 				char *buf)
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16
 {
10
-	struct ocxl_afu *afu = to_ocxl_afu(device);
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+	struct ocxl_afu *afu = to_afu(device);
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18
 
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 	return scnprintf(buf, PAGE_SIZE, "%d\n",
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20
 			afu->config.global_mmio_size);
..
..
@@ -17,7 +24,7 @@
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 				struct device_attribute *attr,
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25
 				char *buf)
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 {
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-	struct ocxl_afu *afu = to_ocxl_afu(device);
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+	struct ocxl_afu *afu = to_afu(device);
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28
 
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 	return scnprintf(buf, PAGE_SIZE, "%d\n",
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 			afu->config.pp_mmio_stride);
..
..
@@ -27,7 +34,7 @@
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 				struct device_attribute *attr,
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 				char *buf)
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 {
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-	struct ocxl_afu *afu = to_ocxl_afu(device);
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+	struct ocxl_afu *afu = to_afu(device);
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38
 
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 	return scnprintf(buf, PAGE_SIZE, "%hhu:%hhu\n",
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40
 			afu->config.version_major,
..
..
@@ -38,10 +45,44 @@
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 		struct device_attribute *attr,
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46
 		char *buf)
40
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 {
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-	struct ocxl_afu *afu = to_ocxl_afu(device);
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+	struct ocxl_afu *afu = to_afu(device);
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49
 
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 	return scnprintf(buf, PAGE_SIZE, "%d/%d\n",
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51
 			afu->pasid_count, afu->pasid_max);
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+}
53
+
54
+static ssize_t reload_on_reset_show(struct device *device,
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+				    struct device_attribute *attr,
56
+				    char *buf)
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+{
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+	struct ocxl_afu *afu = to_afu(device);
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+	struct ocxl_fn *fn = afu->fn;
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+	struct pci_dev *pci_dev = to_pci_dev(fn->dev.parent);
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+	int val;
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+
63
+	if (ocxl_config_get_reset_reload(pci_dev, &val))
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+		return scnprintf(buf, PAGE_SIZE, "unavailable\n");
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+
66
+	return scnprintf(buf, PAGE_SIZE, "%d\n", val);
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+}
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+
69
+static ssize_t reload_on_reset_store(struct device *device,
70
+				     struct device_attribute *attr,
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+				     const char *buf, size_t count)
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+{
73
+	struct ocxl_afu *afu = to_afu(device);
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+	struct ocxl_fn *fn = afu->fn;
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+	struct pci_dev *pci_dev = to_pci_dev(fn->dev.parent);
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+	int rc, val;
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+
78
+	rc = kstrtoint(buf, 0, &val);
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+	if (rc || (val != 0 && val != 1))
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+		return -EINVAL;
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+
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+	if (ocxl_config_set_reset_reload(pci_dev, val))
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+		return -ENODEV;
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+
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+	return count;
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86
 }
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87
 
47
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 static struct device_attribute afu_attrs[] = {
..
..
@@ -49,13 +90,14 @@
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 	__ATTR_RO(pp_mmio_size),
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91
 	__ATTR_RO(afu_version),
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92
 	__ATTR_RO(contexts),
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+	__ATTR_RW(reload_on_reset),
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94
 };
53
95
 
54
96
 static ssize_t global_mmio_read(struct file *filp, struct kobject *kobj,
55
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 				struct bin_attribute *bin_attr, char *buf,
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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));
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101
 
60
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 	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]);
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150
 		if (rc)
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 			goto err;
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 	}
111
153
 
112
-	sysfs_attr_init(&afu->attr_global_mmio.attr);
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-	afu->attr_global_mmio.attr.name = "global_mmio_area";
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-	afu->attr_global_mmio.attr.mode = 0600;
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-	afu->attr_global_mmio.size = afu->config.global_mmio_size;
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-	afu->attr_global_mmio.read = global_mmio_read;
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-	afu->attr_global_mmio.mmap = global_mmio_mmap;
118
-	rc = device_create_bin_file(&afu->dev, &afu->attr_global_mmio);
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+	sysfs_attr_init(&info->attr_global_mmio.attr);
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+	info->attr_global_mmio.attr.name = "global_mmio_area";
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+	info->attr_global_mmio.attr.mode = 0600;
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+	info->attr_global_mmio.size = info->afu->config.global_mmio_size;
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+	info->attr_global_mmio.read = global_mmio_read;
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+	info->attr_global_mmio.mmap = global_mmio_mmap;
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+	rc = device_create_bin_file(&info->dev, &info->attr_global_mmio);
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161
 	if (rc) {
120
-		dev_err(&afu->dev,
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-			"Unable to create global mmio attr for afu: %d\n",
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-			rc);
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+		dev_err(&info->dev, "Unable to create global mmio attr for afu: %d\n", rc);
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 		goto err;
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164
 	}
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165
 
..
..
@@ -127,15 +167,20 @@
127
167
 
128
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 err:
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169
 	for (i--; i >= 0; i--)
130
-		device_remove_file(&afu->dev, &afu_attrs[i]);
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+		device_remove_file(&info->dev, &afu_attrs[i]);
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+
131
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 	return rc;
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173
 }
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174
 
134
-void ocxl_sysfs_remove_afu(struct ocxl_afu *afu)
175
+void ocxl_sysfs_unregister_afu(struct ocxl_file_info *info)
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176
 {
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177
 	int i;
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178
 
179
+	/*
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+	 * device_remove_bin_file is safe to call if the file is not added as
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+	 * the files are removed by name, and early exit if not found
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+	 */
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183
 	for (i = 0; i < ARRAY_SIZE(afu_attrs); i++)
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-		device_remove_file(&afu->dev, &afu_attrs[i]);
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-	device_remove_bin_file(&afu->dev, &afu->attr_global_mmio);
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+		device_remove_file(&info->dev, &afu_attrs[i]);
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+	device_remove_bin_file(&info->dev, &info->attr_global_mmio);
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 }