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