scsi: ufs: add host state prints in failure cases

Whenever some UFS failure occurs the driver prints the UFS
registers in order to help with analysis of the failure.
However this may not be sufficient in some cases, so having
the host controller state as it is represented and managed in
the driver will contribute to analysis efforts.
Added prints of various fields in the hba struct which may be
of interest.

Signed-off-by: Gilad Broner <gbroner@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index e75e50d02e950ba11a9f57c2de21dda2b077d5e6..056e9123b2ad4542ebaaee2f1ea3437b78642e2f 100644 (file)
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -453,6 +453,28 @@ static void ufshcd_print_tmrs(struct ufs_hba *hba, unsigned long bitmap)
        }
 }
 
+static void ufshcd_print_host_state(struct ufs_hba *hba)
+{
+       dev_err(hba->dev, "UFS Host state=%d\n", hba->ufshcd_state);
+       dev_err(hba->dev, "lrb in use=0x%lx, outstanding reqs=0x%lx tasks=0x%lx\n",
+               hba->lrb_in_use, hba->outstanding_tasks, hba->outstanding_reqs);
+       dev_err(hba->dev, "saved_err=0x%x, saved_uic_err=0x%x\n",
+               hba->saved_err, hba->saved_uic_err);
+       dev_err(hba->dev, "Device power mode=%d, UIC link state=%d\n",
+               hba->curr_dev_pwr_mode, hba->uic_link_state);
+       dev_err(hba->dev, "PM in progress=%d, sys. suspended=%d\n",
+               hba->pm_op_in_progress, hba->is_sys_suspended);
+       dev_err(hba->dev, "Auto BKOPS=%d, Host self-block=%d\n",
+               hba->auto_bkops_enabled, hba->host->host_self_blocked);
+       dev_err(hba->dev, "Clk gate=%d\n", hba->clk_gating.state);
+       dev_err(hba->dev, "error handling flags=0x%x, req. abort count=%d\n",
+               hba->eh_flags, hba->req_abort_count);
+       dev_err(hba->dev, "Host capabilities=0x%x, caps=0x%x\n",
+               hba->capabilities, hba->caps);
+       dev_err(hba->dev, "quirks=0x%x, dev. quirks=0x%x\n", hba->quirks,
+               hba->dev_quirks);
+}
+
 /**
  * ufshcd_print_pwr_info - print power params as saved in hba
  * power info
@@ -4426,6 +4448,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
                                "OCS error from controller = %x for tag %d\n",
                                ocs, lrbp->task_tag);
                ufshcd_print_host_regs(hba);
+               ufshcd_print_host_state(hba);
                break;
        } /* end of switch */
 
@@ -5477,6 +5500,7 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
        scsi_print_command(hba->lrb[tag].cmd);
        if (!hba->req_abort_count) {
                ufshcd_print_host_regs(hba);
+               ufshcd_print_host_state(hba);
                ufshcd_print_pwr_info(hba);
                ufshcd_print_trs(hba, 1 << tag, true);
        } else {
@@ -7738,6 +7762,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
        if (err) {
                dev_err(hba->dev, "Host controller enable failed\n");
                ufshcd_print_host_regs(hba);
+               ufshcd_print_host_state(hba);
                goto out_remove_scsi_host;
        }