drivers/scsi/qedf/qedf_attr.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  QLogic FCoE Offload Driver
   4  *  Copyright (c) 2016-2018 Cavium Inc.
   5  */
   6 #include "qedf.h"
   7
   8 inline bool qedf_is_vport(struct qedf_ctx *qedf)
   9 {
  10         return qedf->lport->vport != NULL;
  11 }
  12
  13 /* Get base qedf for physical port from vport */
  14 static struct qedf_ctx *qedf_get_base_qedf(struct qedf_ctx *qedf)
  15 {
  16         struct fc_lport *lport;
  17         struct fc_lport *base_lport;
  18
  19         if (!(qedf_is_vport(qedf)))
  20                 return NULL;
  21
  22         lport = qedf->lport;
  23         base_lport = shost_priv(vport_to_shost(lport->vport));
  24         return lport_priv(base_lport);
  25 }
  26
  27 static ssize_t fcoe_mac_show(struct device *dev,
  28                              struct device_attribute *attr, char *buf)
  29 {
  30         struct fc_lport *lport = shost_priv(class_to_shost(dev));
  31         u32 port_id;
  32         u8 lport_src_id[3];
  33         u8 fcoe_mac[6];
  34
  35         port_id = fc_host_port_id(lport->host);
  36         lport_src_id[2] = (port_id & 0x000000FF);
  37         lport_src_id[1] = (port_id & 0x0000FF00) >> 8;
  38         lport_src_id[0] = (port_id & 0x00FF0000) >> 16;
  39         fc_fcoe_set_mac(fcoe_mac, lport_src_id);
  40
  41         return scnprintf(buf, PAGE_SIZE, "%pM\n", fcoe_mac);
  42 }
  43
  44 static ssize_t fka_period_show(struct device *dev,
  45                                struct device_attribute *attr, char *buf)
  46 {
  47         struct fc_lport *lport = shost_priv(class_to_shost(dev));
  48         struct qedf_ctx *qedf = lport_priv(lport);
  49         int fka_period = -1;
  50
  51         if (qedf_is_vport(qedf))
  52                 qedf = qedf_get_base_qedf(qedf);
  53
  54         if (qedf->ctlr.sel_fcf)
  55                 fka_period = qedf->ctlr.sel_fcf->fka_period;
  56
  57         return scnprintf(buf, PAGE_SIZE, "%d\n", fka_period);
  58 }
  59
  60 static DEVICE_ATTR_RO(fcoe_mac);
  61 static DEVICE_ATTR_RO(fka_period);
  62
  63 static struct attribute *qedf_host_attrs[] = {
  64         &dev_attr_fcoe_mac.attr,
  65         &dev_attr_fka_period.attr,
  66         NULL,
  67 };
  68
  69 static const struct attribute_group qedf_host_attr_group = {
  70         .attrs = qedf_host_attrs
  71 };
  72
  73 const struct attribute_group *qedf_host_groups[] = {
  74         &qedf_host_attr_group,
  75         NULL
  76 };
  77
  78 extern const struct qed_fcoe_ops *qed_ops;
  79
  80 void qedf_capture_grc_dump(struct qedf_ctx *qedf)
  81 {
  82         struct qedf_ctx *base_qedf;
  83
  84         /* Make sure we use the base qedf to take the GRC dump */
  85         if (qedf_is_vport(qedf))
  86                 base_qedf = qedf_get_base_qedf(qedf);
  87         else
  88                 base_qedf = qedf;
  89
  90         if (test_bit(QEDF_GRCDUMP_CAPTURE, &base_qedf->flags)) {
  91                 QEDF_INFO(&(base_qedf->dbg_ctx), QEDF_LOG_INFO,
  92                     "GRC Dump already captured.\n");
  93                 return;
  94         }
  95
  96
  97         qedf_get_grc_dump(base_qedf->cdev, qed_ops->common,
  98             &base_qedf->grcdump, &base_qedf->grcdump_size);
  99         QEDF_ERR(&(base_qedf->dbg_ctx), "GRC Dump captured.\n");
 100         set_bit(QEDF_GRCDUMP_CAPTURE, &base_qedf->flags);
 101         qedf_uevent_emit(base_qedf->lport->host, QEDF_UEVENT_CODE_GRCDUMP,
 102             NULL);
 103 }
 104
 105 static ssize_t
 106 qedf_sysfs_read_grcdump(struct file *filep, struct kobject *kobj,
 107                         struct bin_attribute *ba, char *buf, loff_t off,
 108                         size_t count)
 109 {
 110         ssize_t ret = 0;
 111         struct fc_lport *lport = shost_priv(dev_to_shost(container_of(kobj,
 112                                                         struct device, kobj)));
 113         struct qedf_ctx *qedf = lport_priv(lport);
 114
 115         if (test_bit(QEDF_GRCDUMP_CAPTURE, &qedf->flags)) {
 116                 ret = memory_read_from_buffer(buf, count, &off,
 117                     qedf->grcdump, qedf->grcdump_size);
 118         } else {
 119                 QEDF_ERR(&(qedf->dbg_ctx), "GRC Dump not captured!\n");
 120         }
 121
 122         return ret;
 123 }
 124
 125 static ssize_t
 126 qedf_sysfs_write_grcdump(struct file *filep, struct kobject *kobj,
 127                         struct bin_attribute *ba, char *buf, loff_t off,
 128                         size_t count)
 129 {
 130         struct fc_lport *lport = NULL;
 131         struct qedf_ctx *qedf = NULL;
 132         long reading;
 133         int ret = 0;
 134
 135         if (off != 0)
 136                 return ret;
 137
 138
 139         lport = shost_priv(dev_to_shost(container_of(kobj,
 140             struct device, kobj)));
 141         qedf = lport_priv(lport);
 142
 143         buf[1] = 0;
 144         ret = kstrtol(buf, 10, &reading);
 145         if (ret) {
 146                 QEDF_ERR(&(qedf->dbg_ctx), "Invalid input, err(%d)\n", ret);
 147                 return ret;
 148         }
 149
 150         switch (reading) {
 151         case 0:
 152                 memset(qedf->grcdump, 0, qedf->grcdump_size);
 153                 clear_bit(QEDF_GRCDUMP_CAPTURE, &qedf->flags);
 154                 break;
 155         case 1:
 156                 qedf_capture_grc_dump(qedf);
 157                 break;
 158         }
 159
 160         return count;
 161 }
 162
 163 static struct bin_attribute sysfs_grcdump_attr = {
 164         .attr = {
 165                 .name = "grcdump",
 166                 .mode = S_IRUSR | S_IWUSR,
 167         },
 168         .size = 0,
 169         .read = qedf_sysfs_read_grcdump,
 170         .write = qedf_sysfs_write_grcdump,
 171 };
 172
 173 static struct sysfs_bin_attrs bin_file_entries[] = {
 174         {"grcdump", &sysfs_grcdump_attr},
 175         {NULL},
 176 };
 177
 178 void qedf_create_sysfs_ctx_attr(struct qedf_ctx *qedf)
 179 {
 180         qedf_create_sysfs_attr(qedf->lport->host, bin_file_entries);
 181 }
 182
 183 void qedf_remove_sysfs_ctx_attr(struct qedf_ctx *qedf)
 184 {
 185         qedf_remove_sysfs_attr(qedf->lport->host, bin_file_entries);
 186 }