Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Driver for FPGA Management Engine (FME) |
| 4 | * |
| 5 | * Copyright (C) 2017-2018 Intel Corporation, Inc. |
| 6 | * |
| 7 | * Authors: |
| 8 | * Kang Luwei <luwei.kang@intel.com> |
| 9 | * Xiao Guangrong <guangrong.xiao@linux.intel.com> |
| 10 | * Joseph Grecco <joe.grecco@intel.com> |
| 11 | * Enno Luebbers <enno.luebbers@intel.com> |
| 12 | * Tim Whisonant <tim.whisonant@intel.com> |
| 13 | * Ananda Ravuri <ananda.ravuri@intel.com> |
| 14 | * Henry Mitchel <henry.mitchel@intel.com> |
| 15 | */ |
| 16 | |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/module.h> |
Wu Hao | 620e1902 | 2018-06-30 08:53:23 +0800 | [diff] [blame] | 19 | #include <linux/fpga-dfl.h> |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 20 | |
| 21 | #include "dfl.h" |
Kang Luwei | 29de762 | 2018-06-30 08:53:24 +0800 | [diff] [blame] | 22 | #include "dfl-fme.h" |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 23 | |
Kang Luwei | 0a27ff2 | 2018-06-30 08:53:22 +0800 | [diff] [blame] | 24 | static ssize_t ports_num_show(struct device *dev, |
| 25 | struct device_attribute *attr, char *buf) |
| 26 | { |
| 27 | void __iomem *base; |
| 28 | u64 v; |
| 29 | |
| 30 | base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER); |
| 31 | |
| 32 | v = readq(base + FME_HDR_CAP); |
| 33 | |
| 34 | return scnprintf(buf, PAGE_SIZE, "%u\n", |
| 35 | (unsigned int)FIELD_GET(FME_CAP_NUM_PORTS, v)); |
| 36 | } |
| 37 | static DEVICE_ATTR_RO(ports_num); |
| 38 | |
| 39 | /* |
| 40 | * Bitstream (static FPGA region) identifier number. It contains the |
| 41 | * detailed version and other information of this static FPGA region. |
| 42 | */ |
| 43 | static ssize_t bitstream_id_show(struct device *dev, |
| 44 | struct device_attribute *attr, char *buf) |
| 45 | { |
| 46 | void __iomem *base; |
| 47 | u64 v; |
| 48 | |
| 49 | base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER); |
| 50 | |
| 51 | v = readq(base + FME_HDR_BITSTREAM_ID); |
| 52 | |
| 53 | return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)v); |
| 54 | } |
| 55 | static DEVICE_ATTR_RO(bitstream_id); |
| 56 | |
| 57 | /* |
| 58 | * Bitstream (static FPGA region) meta data. It contains the synthesis |
| 59 | * date, seed and other information of this static FPGA region. |
| 60 | */ |
| 61 | static ssize_t bitstream_metadata_show(struct device *dev, |
| 62 | struct device_attribute *attr, char *buf) |
| 63 | { |
| 64 | void __iomem *base; |
| 65 | u64 v; |
| 66 | |
| 67 | base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER); |
| 68 | |
| 69 | v = readq(base + FME_HDR_BITSTREAM_MD); |
| 70 | |
| 71 | return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)v); |
| 72 | } |
| 73 | static DEVICE_ATTR_RO(bitstream_metadata); |
| 74 | |
| 75 | static const struct attribute *fme_hdr_attrs[] = { |
| 76 | &dev_attr_ports_num.attr, |
| 77 | &dev_attr_bitstream_id.attr, |
| 78 | &dev_attr_bitstream_metadata.attr, |
| 79 | NULL, |
| 80 | }; |
| 81 | |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 82 | static int fme_hdr_init(struct platform_device *pdev, |
| 83 | struct dfl_feature *feature) |
| 84 | { |
Kang Luwei | 0a27ff2 | 2018-06-30 08:53:22 +0800 | [diff] [blame] | 85 | void __iomem *base = feature->ioaddr; |
| 86 | int ret; |
| 87 | |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 88 | dev_dbg(&pdev->dev, "FME HDR Init.\n"); |
Kang Luwei | 0a27ff2 | 2018-06-30 08:53:22 +0800 | [diff] [blame] | 89 | dev_dbg(&pdev->dev, "FME cap %llx.\n", |
| 90 | (unsigned long long)readq(base + FME_HDR_CAP)); |
| 91 | |
| 92 | ret = sysfs_create_files(&pdev->dev.kobj, fme_hdr_attrs); |
| 93 | if (ret) |
| 94 | return ret; |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static void fme_hdr_uinit(struct platform_device *pdev, |
| 100 | struct dfl_feature *feature) |
| 101 | { |
| 102 | dev_dbg(&pdev->dev, "FME HDR UInit.\n"); |
Kang Luwei | 0a27ff2 | 2018-06-30 08:53:22 +0800 | [diff] [blame] | 103 | sysfs_remove_files(&pdev->dev.kobj, fme_hdr_attrs); |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | static const struct dfl_feature_ops fme_hdr_ops = { |
| 107 | .init = fme_hdr_init, |
| 108 | .uinit = fme_hdr_uinit, |
| 109 | }; |
| 110 | |
| 111 | static struct dfl_feature_driver fme_feature_drvs[] = { |
| 112 | { |
| 113 | .id = FME_FEATURE_ID_HEADER, |
| 114 | .ops = &fme_hdr_ops, |
| 115 | }, |
| 116 | { |
Kang Luwei | 29de762 | 2018-06-30 08:53:24 +0800 | [diff] [blame] | 117 | .id = FME_FEATURE_ID_PR_MGMT, |
| 118 | .ops = &pr_mgmt_ops, |
| 119 | }, |
| 120 | { |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 121 | .ops = NULL, |
| 122 | }, |
| 123 | }; |
| 124 | |
Wu Hao | 620e1902 | 2018-06-30 08:53:23 +0800 | [diff] [blame] | 125 | static long fme_ioctl_check_extension(struct dfl_feature_platform_data *pdata, |
| 126 | unsigned long arg) |
| 127 | { |
| 128 | /* No extension support for now */ |
| 129 | return 0; |
| 130 | } |
| 131 | |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 132 | static int fme_open(struct inode *inode, struct file *filp) |
| 133 | { |
| 134 | struct platform_device *fdev = dfl_fpga_inode_to_feature_dev(inode); |
| 135 | struct dfl_feature_platform_data *pdata = dev_get_platdata(&fdev->dev); |
| 136 | int ret; |
| 137 | |
| 138 | if (WARN_ON(!pdata)) |
| 139 | return -ENODEV; |
| 140 | |
| 141 | ret = dfl_feature_dev_use_begin(pdata); |
| 142 | if (ret) |
| 143 | return ret; |
| 144 | |
| 145 | dev_dbg(&fdev->dev, "Device File Open\n"); |
| 146 | filp->private_data = pdata; |
| 147 | |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static int fme_release(struct inode *inode, struct file *filp) |
| 152 | { |
| 153 | struct dfl_feature_platform_data *pdata = filp->private_data; |
| 154 | struct platform_device *pdev = pdata->dev; |
| 155 | |
| 156 | dev_dbg(&pdev->dev, "Device File Release\n"); |
| 157 | dfl_feature_dev_use_end(pdata); |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | static long fme_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 163 | { |
| 164 | struct dfl_feature_platform_data *pdata = filp->private_data; |
| 165 | struct platform_device *pdev = pdata->dev; |
| 166 | struct dfl_feature *f; |
| 167 | long ret; |
| 168 | |
| 169 | dev_dbg(&pdev->dev, "%s cmd 0x%x\n", __func__, cmd); |
| 170 | |
| 171 | switch (cmd) { |
Wu Hao | 620e1902 | 2018-06-30 08:53:23 +0800 | [diff] [blame] | 172 | case DFL_FPGA_GET_API_VERSION: |
| 173 | return DFL_FPGA_API_VERSION; |
| 174 | case DFL_FPGA_CHECK_EXTENSION: |
| 175 | return fme_ioctl_check_extension(pdata, arg); |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 176 | default: |
| 177 | /* |
| 178 | * Let sub-feature's ioctl function to handle the cmd. |
| 179 | * Sub-feature's ioctl returns -ENODEV when cmd is not |
| 180 | * handled in this sub feature, and returns 0 or other |
| 181 | * error code if cmd is handled. |
| 182 | */ |
| 183 | dfl_fpga_dev_for_each_feature(pdata, f) { |
| 184 | if (f->ops && f->ops->ioctl) { |
| 185 | ret = f->ops->ioctl(pdev, f, cmd, arg); |
| 186 | if (ret != -ENODEV) |
| 187 | return ret; |
| 188 | } |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | return -EINVAL; |
| 193 | } |
| 194 | |
Kang Luwei | 29de762 | 2018-06-30 08:53:24 +0800 | [diff] [blame] | 195 | static int fme_dev_init(struct platform_device *pdev) |
| 196 | { |
| 197 | struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev); |
| 198 | struct dfl_fme *fme; |
| 199 | |
| 200 | fme = devm_kzalloc(&pdev->dev, sizeof(*fme), GFP_KERNEL); |
| 201 | if (!fme) |
| 202 | return -ENOMEM; |
| 203 | |
| 204 | fme->pdata = pdata; |
| 205 | |
| 206 | mutex_lock(&pdata->lock); |
| 207 | dfl_fpga_pdata_set_private(pdata, fme); |
| 208 | mutex_unlock(&pdata->lock); |
| 209 | |
| 210 | return 0; |
| 211 | } |
| 212 | |
| 213 | static void fme_dev_destroy(struct platform_device *pdev) |
| 214 | { |
| 215 | struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev); |
| 216 | struct dfl_fme *fme; |
| 217 | |
| 218 | mutex_lock(&pdata->lock); |
| 219 | fme = dfl_fpga_pdata_get_private(pdata); |
| 220 | dfl_fpga_pdata_set_private(pdata, NULL); |
| 221 | mutex_unlock(&pdata->lock); |
| 222 | } |
| 223 | |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 224 | static const struct file_operations fme_fops = { |
| 225 | .owner = THIS_MODULE, |
| 226 | .open = fme_open, |
| 227 | .release = fme_release, |
| 228 | .unlocked_ioctl = fme_ioctl, |
| 229 | }; |
| 230 | |
| 231 | static int fme_probe(struct platform_device *pdev) |
| 232 | { |
| 233 | int ret; |
| 234 | |
Kang Luwei | 29de762 | 2018-06-30 08:53:24 +0800 | [diff] [blame] | 235 | ret = fme_dev_init(pdev); |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 236 | if (ret) |
| 237 | goto exit; |
| 238 | |
Kang Luwei | 29de762 | 2018-06-30 08:53:24 +0800 | [diff] [blame] | 239 | ret = dfl_fpga_dev_feature_init(pdev, fme_feature_drvs); |
| 240 | if (ret) |
| 241 | goto dev_destroy; |
| 242 | |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 243 | ret = dfl_fpga_dev_ops_register(pdev, &fme_fops, THIS_MODULE); |
| 244 | if (ret) |
| 245 | goto feature_uinit; |
| 246 | |
| 247 | return 0; |
| 248 | |
| 249 | feature_uinit: |
| 250 | dfl_fpga_dev_feature_uinit(pdev); |
Kang Luwei | 29de762 | 2018-06-30 08:53:24 +0800 | [diff] [blame] | 251 | dev_destroy: |
| 252 | fme_dev_destroy(pdev); |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 253 | exit: |
| 254 | return ret; |
| 255 | } |
| 256 | |
| 257 | static int fme_remove(struct platform_device *pdev) |
| 258 | { |
| 259 | dfl_fpga_dev_ops_unregister(pdev); |
| 260 | dfl_fpga_dev_feature_uinit(pdev); |
Kang Luwei | 29de762 | 2018-06-30 08:53:24 +0800 | [diff] [blame] | 261 | fme_dev_destroy(pdev); |
Kang Luwei | 322ddeb | 2018-06-30 08:53:21 +0800 | [diff] [blame] | 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | static struct platform_driver fme_driver = { |
| 267 | .driver = { |
| 268 | .name = DFL_FPGA_FEATURE_DEV_FME, |
| 269 | }, |
| 270 | .probe = fme_probe, |
| 271 | .remove = fme_remove, |
| 272 | }; |
| 273 | |
| 274 | module_platform_driver(fme_driver); |
| 275 | |
| 276 | MODULE_DESCRIPTION("FPGA Management Engine driver"); |
| 277 | MODULE_AUTHOR("Intel Corporation"); |
| 278 | MODULE_LICENSE("GPL v2"); |
| 279 | MODULE_ALIAS("platform:dfl-fme"); |