Quelle  qed_devlink.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/* Marvell/Qlogic FastLinQ NIC driver
 *
 * Copyright (C) 2020 Marvell International Ltd.
 */

#include <linux/kernel.h>
#include <linux/qed/qed_if.h>
#include <linux/vmalloc.h>
#include "qed.h"
#include "qed_devlink.h"

enum qed_devlink_param_id {
 QED_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
 QED_DEVLINK_PARAM_ID_IWARP_CMT,
};

struct qed_fw_fatal_ctx {
 enum qed_hw_err_type err_type;
};

int qed_report_fatal_error(struct devlink *devlink, enum qed_hw_err_type err_type)
{
 struct qed_devlink *qdl = devlink_priv(devlink);
 struct qed_fw_fatal_ctx fw_fatal_ctx = {
  .err_type = err_type,
 };

 if (qdl->fw_reporter)
  devlink_health_report(qdl->fw_reporter,
          "Fatal error occurred", &fw_fatal_ctx);

 return 0;
}

static int
qed_fw_fatal_reporter_dump(struct devlink_health_reporter *reporter,
      struct devlink_fmsg *fmsg, void *priv_ctx,
      struct netlink_ext_ack *extack)
{
 struct qed_devlink *qdl = devlink_health_reporter_priv(reporter);
 struct qed_fw_fatal_ctx *fw_fatal_ctx = priv_ctx;
 struct qed_dev *cdev = qdl->cdev;
 u32 dbg_data_buf_size;
 u8 *p_dbg_data_buf;
 int err;

 /* Having context means that was a dump request after fatal,
 * so we enable extra debugging while gathering the dump,
 * just in case
 */
 cdev->print_dbg_data = fw_fatal_ctx ? true : false;

 dbg_data_buf_size = qed_dbg_all_data_size(cdev);
 p_dbg_data_buf = vzalloc(dbg_data_buf_size);
 if (!p_dbg_data_buf) {
  DP_NOTICE(cdev,
     "Failed to allocate memory for a debug data buffer\n");
  return -ENOMEM;
 }

 err = qed_dbg_all_data(cdev, p_dbg_data_buf);
 if (err) {
  DP_NOTICE(cdev, "Failed to obtain debug data\n");
  vfree(p_dbg_data_buf);
  return err;
 }

 devlink_fmsg_binary_pair_put(fmsg, "dump_data", p_dbg_data_buf,
         dbg_data_buf_size);

 vfree(p_dbg_data_buf);

 return 0;
}

static int
qed_fw_fatal_reporter_recover(struct devlink_health_reporter *reporter,
         void *priv_ctx,
         struct netlink_ext_ack *extack)
{
 struct qed_devlink *qdl = devlink_health_reporter_priv(reporter);
 struct qed_dev *cdev = qdl->cdev;

 qed_recovery_process(cdev);

 return 0;
}

static const struct devlink_health_reporter_ops qed_fw_fatal_reporter_ops = {
  .name = "fw_fatal",
  .recover = qed_fw_fatal_reporter_recover,
  .dump = qed_fw_fatal_reporter_dump,
};

#define QED_REPORTER_FW_GRACEFUL_PERIOD 0

void qed_fw_reporters_create(struct devlink *devlink)
{
 struct qed_devlink *dl = devlink_priv(devlink);

 dl->fw_reporter = devlink_health_reporter_create(devlink, &qed_fw_fatal_reporter_ops,
        QED_REPORTER_FW_GRACEFUL_PERIOD, dl);
 if (IS_ERR(dl->fw_reporter)) {
  DP_NOTICE(dl->cdev, "Failed to create fw reporter, err = %ld\n",
     PTR_ERR(dl->fw_reporter));
  dl->fw_reporter = NULL;
 }
}

void qed_fw_reporters_destroy(struct devlink *devlink)
{
 struct qed_devlink *dl = devlink_priv(devlink);
 struct devlink_health_reporter *rep;

 rep = dl->fw_reporter;

 if (!IS_ERR_OR_NULL(rep))
  devlink_health_reporter_destroy(rep);
}

static int qed_dl_param_get(struct devlink *dl, u32 id,
       struct devlink_param_gset_ctx *ctx)
{
 struct qed_devlink *qed_dl = devlink_priv(dl);
 struct qed_dev *cdev;

 cdev = qed_dl->cdev;
 ctx->val.vbool = cdev->iwarp_cmt;

 return 0;
}

static int qed_dl_param_set(struct devlink *dl, u32 id,
       struct devlink_param_gset_ctx *ctx,
       struct netlink_ext_ack *extack)
{
 struct qed_devlink *qed_dl = devlink_priv(dl);
 struct qed_dev *cdev;

 cdev = qed_dl->cdev;
 cdev->iwarp_cmt = ctx->val.vbool;

 return 0;
}

static const struct devlink_param qed_devlink_params[] = {
 DEVLINK_PARAM_DRIVER(QED_DEVLINK_PARAM_ID_IWARP_CMT,
        "iwarp_cmt", DEVLINK_PARAM_TYPE_BOOL,
        BIT(DEVLINK_PARAM_CMODE_RUNTIME),
        qed_dl_param_get, qed_dl_param_set, NULL),
};

static int qed_devlink_info_get(struct devlink *devlink,
    struct devlink_info_req *req,
    struct netlink_ext_ack *extack)
{
 struct qed_devlink *qed_dl = devlink_priv(devlink);
 struct qed_dev *cdev = qed_dl->cdev;
 struct qed_dev_info *dev_info;
 char buf[100];
 int err;

 dev_info = &cdev->common_dev_info;

 memcpy(buf, cdev->hwfns[0].hw_info.part_num, sizeof(cdev->hwfns[0].hw_info.part_num));
 buf[sizeof(cdev->hwfns[0].hw_info.part_num)] = 0;

 if (buf[0]) {
  err = devlink_info_board_serial_number_put(req, buf);
  if (err)
   return err;
 }

 snprintf(buf, sizeof(buf), "%d.%d.%d.%d",
   GET_MFW_FIELD(dev_info->mfw_rev, QED_MFW_VERSION_3),
   GET_MFW_FIELD(dev_info->mfw_rev, QED_MFW_VERSION_2),
   GET_MFW_FIELD(dev_info->mfw_rev, QED_MFW_VERSION_1),
   GET_MFW_FIELD(dev_info->mfw_rev, QED_MFW_VERSION_0));

 err = devlink_info_version_stored_put(req,
           DEVLINK_INFO_VERSION_GENERIC_FW_MGMT, buf);
 if (err)
  return err;

 snprintf(buf, sizeof(buf), "%d.%d.%d.%d",
   dev_info->fw_major,
   dev_info->fw_minor,
   dev_info->fw_rev,
   dev_info->fw_eng);

 return devlink_info_version_running_put(req,
      DEVLINK_INFO_VERSION_GENERIC_FW_APP, buf);
}

static const struct devlink_ops qed_dl_ops = {
 .info_get = qed_devlink_info_get,
};

struct devlink *qed_devlink_register(struct qed_dev *cdev)
{
 struct qed_devlink *qdevlink;
 struct devlink *dl;
 int rc;

 dl = devlink_alloc(&qed_dl_ops, sizeof(struct qed_devlink),
      &cdev->pdev->dev);
 if (!dl)
  return ERR_PTR(-ENOMEM);

 qdevlink = devlink_priv(dl);
 qdevlink->cdev = cdev;

 rc = devlink_params_register(dl, qed_devlink_params,
         ARRAY_SIZE(qed_devlink_params));
 if (rc)
  goto err_unregister;

 cdev->iwarp_cmt = false;

 qed_fw_reporters_create(dl);
 devlink_register(dl);
 return dl;

err_unregister:
 devlink_free(dl);

 return ERR_PTR(rc);
}

void qed_devlink_unregister(struct devlink *devlink)
{
 if (!devlink)
  return;

 devlink_unregister(devlink);
 qed_fw_reporters_destroy(devlink);

 devlink_params_unregister(devlink, qed_devlink_params,
      ARRAY_SIZE(qed_devlink_params));

 devlink_free(devlink);
}