1
2
3#include <linux/sysfs.h>
4#include "ocxl_internal.h"
5
6static 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
13static ssize_t global_mmio_size_show(struct device *device,
14 struct device_attribute *attr,
15 char *buf)
16{
17 struct ocxl_afu *afu = to_afu(device);
18
19 return scnprintf(buf, PAGE_SIZE, "%d\n",
20 afu->config.global_mmio_size);
21}
22
23static ssize_t pp_mmio_size_show(struct device *device,
24 struct device_attribute *attr,
25 char *buf)
26{
27 struct ocxl_afu *afu = to_afu(device);
28
29 return scnprintf(buf, PAGE_SIZE, "%d\n",
30 afu->config.pp_mmio_stride);
31}
32
33static ssize_t afu_version_show(struct device *device,
34 struct device_attribute *attr,
35 char *buf)
36{
37 struct ocxl_afu *afu = to_afu(device);
38
39 return scnprintf(buf, PAGE_SIZE, "%hhu:%hhu\n",
40 afu->config.version_major,
41 afu->config.version_minor);
42}
43
44static ssize_t contexts_show(struct device *device,
45 struct device_attribute *attr,
46 char *buf)
47{
48 struct ocxl_afu *afu = to_afu(device);
49
50 return scnprintf(buf, PAGE_SIZE, "%d/%d\n",
51 afu->pasid_count, afu->pasid_max);
52}
53
54static 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
69static 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;
86}
87
88static struct device_attribute afu_attrs[] = {
89 __ATTR_RO(global_mmio_size),
90 __ATTR_RO(pp_mmio_size),
91 __ATTR_RO(afu_version),
92 __ATTR_RO(contexts),
93 __ATTR_RW(reload_on_reset),
94};
95
96static ssize_t global_mmio_read(struct file *filp, struct kobject *kobj,
97 struct bin_attribute *bin_attr, char *buf,
98 loff_t off, size_t count)
99{
100 struct ocxl_afu *afu = to_afu(kobj_to_dev(kobj));
101
102 if (count == 0 || off < 0 ||
103 off >= afu->config.global_mmio_size)
104 return 0;
105 memcpy_fromio(buf, afu->global_mmio_ptr + off, count);
106 return count;
107}
108
109static vm_fault_t global_mmio_fault(struct vm_fault *vmf)
110{
111 struct vm_area_struct *vma = vmf->vma;
112 struct ocxl_afu *afu = vma->vm_private_data;
113 unsigned long offset;
114
115 if (vmf->pgoff >= (afu->config.global_mmio_size >> PAGE_SHIFT))
116 return VM_FAULT_SIGBUS;
117
118 offset = vmf->pgoff;
119 offset += (afu->global_mmio_start >> PAGE_SHIFT);
120 return vmf_insert_pfn(vma, vmf->address, offset);
121}
122
123static const struct vm_operations_struct global_mmio_vmops = {
124 .fault = global_mmio_fault,
125};
126
127static int global_mmio_mmap(struct file *filp, struct kobject *kobj,
128 struct bin_attribute *bin_attr,
129 struct vm_area_struct *vma)
130{
131 struct ocxl_afu *afu = to_afu(kobj_to_dev(kobj));
132
133 if ((vma_pages(vma) + vma->vm_pgoff) >
134 (afu->config.global_mmio_size >> PAGE_SHIFT))
135 return -EINVAL;
136
137 vma->vm_flags |= VM_IO | VM_PFNMAP;
138 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
139 vma->vm_ops = &global_mmio_vmops;
140 vma->vm_private_data = afu;
141 return 0;
142}
143
144int ocxl_sysfs_register_afu(struct ocxl_file_info *info)
145{
146 int i, rc;
147
148 for (i = 0; i < ARRAY_SIZE(afu_attrs); i++) {
149 rc = device_create_file(&info->dev, &afu_attrs[i]);
150 if (rc)
151 goto err;
152 }
153
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);
161 if (rc) {
162 dev_err(&info->dev, "Unable to create global mmio attr for afu: %d\n", rc);
163 goto err;
164 }
165
166 return 0;
167
168err:
169 for (i--; i >= 0; i--)
170 device_remove_file(&info->dev, &afu_attrs[i]);
171
172 return rc;
173}
174
175void ocxl_sysfs_unregister_afu(struct ocxl_file_info *info)
176{
177 int i;
178
179
180
181
182
183 for (i = 0; i < ARRAY_SIZE(afu_attrs); i++)
184 device_remove_file(&info->dev, &afu_attrs[i]);
185 device_remove_bin_file(&info->dev, &info->attr_global_mmio);
186}
187
