drivers/scsi/qedf/qedf_attr.c

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