Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | // Copyright 2017 IBM Corp. |
| 3 | #include <linux/sysfs.h> |
| 4 | #include "ocxl_internal.h" |
| 5 | |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 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 | |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 13 | static ssize_t global_mmio_size_show(struct device *device, |
| 14 | struct device_attribute *attr, |
| 15 | char *buf) |
| 16 | { |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 17 | struct ocxl_afu *afu = to_afu(device); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 18 | |
| 19 | return scnprintf(buf, PAGE_SIZE, "%d\n", |
| 20 | afu->config.global_mmio_size); |
| 21 | } |
| 22 | |
| 23 | static ssize_t pp_mmio_size_show(struct device *device, |
| 24 | struct device_attribute *attr, |
| 25 | char *buf) |
| 26 | { |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 27 | struct ocxl_afu *afu = to_afu(device); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 28 | |
| 29 | return scnprintf(buf, PAGE_SIZE, "%d\n", |
| 30 | afu->config.pp_mmio_stride); |
| 31 | } |
| 32 | |
| 33 | static ssize_t afu_version_show(struct device *device, |
| 34 | struct device_attribute *attr, |
| 35 | char *buf) |
| 36 | { |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 37 | struct ocxl_afu *afu = to_afu(device); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 38 | |
| 39 | return scnprintf(buf, PAGE_SIZE, "%hhu:%hhu\n", |
| 40 | afu->config.version_major, |
| 41 | afu->config.version_minor); |
| 42 | } |
| 43 | |
| 44 | static ssize_t contexts_show(struct device *device, |
| 45 | struct device_attribute *attr, |
| 46 | char *buf) |
| 47 | { |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 48 | struct ocxl_afu *afu = to_afu(device); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 49 | |
| 50 | return scnprintf(buf, PAGE_SIZE, "%d/%d\n", |
| 51 | afu->pasid_count, afu->pasid_max); |
| 52 | } |
| 53 | |
Philippe Bergheaud | 87db757 | 2020-06-19 16:04:39 +0200 | [diff] [blame] | 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; |
| 86 | } |
| 87 | |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 88 | static 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), |
Philippe Bergheaud | 87db757 | 2020-06-19 16:04:39 +0200 | [diff] [blame] | 93 | __ATTR_RW(reload_on_reset), |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 94 | }; |
| 95 | |
| 96 | static 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 | { |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 100 | struct ocxl_afu *afu = to_afu(kobj_to_dev(kobj)); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 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 | |
Souptick Joarder | a545cf0 | 2018-06-12 01:59:04 +0530 | [diff] [blame] | 109 | static vm_fault_t global_mmio_fault(struct vm_fault *vmf) |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 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); |
Souptick Joarder | a545cf0 | 2018-06-12 01:59:04 +0530 | [diff] [blame] | 120 | return vmf_insert_pfn(vma, vmf->address, offset); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | static const struct vm_operations_struct global_mmio_vmops = { |
| 124 | .fault = global_mmio_fault, |
| 125 | }; |
| 126 | |
| 127 | static int global_mmio_mmap(struct file *filp, struct kobject *kobj, |
| 128 | struct bin_attribute *bin_attr, |
| 129 | struct vm_area_struct *vma) |
| 130 | { |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 131 | struct ocxl_afu *afu = to_afu(kobj_to_dev(kobj)); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 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 | |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 144 | int ocxl_sysfs_register_afu(struct ocxl_file_info *info) |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 145 | { |
| 146 | int i, rc; |
| 147 | |
| 148 | for (i = 0; i < ARRAY_SIZE(afu_attrs); i++) { |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 149 | rc = device_create_file(&info->dev, &afu_attrs[i]); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 150 | if (rc) |
| 151 | goto err; |
| 152 | } |
| 153 | |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 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); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 161 | if (rc) { |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 162 | dev_err(&info->dev, "Unable to create global mmio attr for afu: %d\n", rc); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 163 | goto err; |
| 164 | } |
| 165 | |
| 166 | return 0; |
| 167 | |
| 168 | err: |
| 169 | for (i--; i >= 0; i--) |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 170 | device_remove_file(&info->dev, &afu_attrs[i]); |
| 171 | |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 172 | return rc; |
| 173 | } |
| 174 | |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 175 | void ocxl_sysfs_unregister_afu(struct ocxl_file_info *info) |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 176 | { |
| 177 | int i; |
| 178 | |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 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 | */ |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 183 | for (i = 0; i < ARRAY_SIZE(afu_attrs); i++) |
Alastair D'Silva | 75ca758 | 2019-03-27 16:31:32 +1100 | [diff] [blame] | 184 | device_remove_file(&info->dev, &afu_attrs[i]); |
| 185 | device_remove_bin_file(&info->dev, &info->attr_global_mmio); |
Frederic Barrat | 5ef3166 | 2018-01-23 12:31:41 +0100 | [diff] [blame] | 186 | } |