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scsi: ufs: Add fatal and auto-hibern8 error history

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Provide more information about fatal and auto-hibern8 errors to improve
debugging by extending existing UFS error history framework.

[mkp: typos]

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stanley Chu 2019-07-10 21:38:19 +08:00 committed by Martin K. Petersen
parent 48d5b97325
commit d3c615bf58
2 changed files with 19 additions and 2 deletions
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11
drivers/scsi/ufs/ufshcd.c
View File

@ -429,6 +429,9 @@ static void ufshcd_print_host_regs(struct ufs_hba *hba)
ufshcd_print_err_hist(hba, &hba->ufs_stats.nl_err, "nl_err");
ufshcd_print_err_hist(hba, &hba->ufs_stats.tl_err, "tl_err");
ufshcd_print_err_hist(hba, &hba->ufs_stats.dme_err, "dme_err");
ufshcd_print_err_hist(hba, &hba->ufs_stats.fatal_err, "fatal_err");
ufshcd_print_err_hist(hba, &hba->ufs_stats.auto_hibern8_err,
"auto_hibern8_err");
ufshcd_print_clk_freqs(hba);
@ -5439,8 +5442,10 @@ static void ufshcd_check_errors(struct ufs_hba *hba)
{
bool queue_eh_work = false;
if (hba->errors & INT_FATAL_ERRORS)
if (hba->errors & INT_FATAL_ERRORS) {
ufshcd_update_reg_hist(&hba->ufs_stats.fatal_err, hba->errors);
queue_eh_work = true;
}
if (hba->errors & UIC_ERROR) {
hba->uic_error = 0;
@ -5455,6 +5460,8 @@ static void ufshcd_check_errors(struct ufs_hba *hba)
__func__, (hba->errors & UIC_HIBERNATE_ENTER) ?
"Enter" : "Exit",
hba->errors, ufshcd_get_upmcrs(hba));
ufshcd_update_reg_hist(&hba->ufs_stats.auto_hibern8_err,
hba->errors);
queue_eh_work = true;
}
@ -6692,6 +6699,8 @@ static void ufshcd_clear_dbg_ufs_stats(struct ufs_hba *hba)
memset(&hba->ufs_stats.nl_err, 0, err_reg_hist_size);
memset(&hba->ufs_stats.tl_err, 0, err_reg_hist_size);
memset(&hba->ufs_stats.dme_err, 0, err_reg_hist_size);
memset(&hba->ufs_stats.fatal_err, 0, err_reg_hist_size);
memset(&hba->ufs_stats.auto_hibern8_err, 0, err_reg_hist_size);
hba->req_abort_count = 0;
}

10
drivers/scsi/ufs/ufshcd.h
View File

@ -414,7 +414,7 @@ struct ufs_init_prefetch {
#define UFS_ERR_REG_HIST_LENGTH 8
/**
* struct ufs_err_reg_hist - keeps history of uic errors
* struct ufs_err_reg_hist - keeps history of errors
* @pos: index to indicate cyclic buffer position
* @reg: cyclic buffer for registers value
* @tstamp: cyclic buffer for time stamp
@ -436,15 +436,23 @@ struct ufs_err_reg_hist {
* @nl_err: tracks nl-uic errors
* @tl_err: tracks tl-uic errors
* @dme_err: tracks dme errors
* @fatal_err: tracks fatal errors
* @auto_hibern8_err: tracks auto-hibernate errors
*/
struct ufs_stats {
u32 hibern8_exit_cnt;
ktime_t last_hibern8_exit_tstamp;
/* uic specific errors */
struct ufs_err_reg_hist pa_err;
struct ufs_err_reg_hist dl_err;
struct ufs_err_reg_hist nl_err;
struct ufs_err_reg_hist tl_err;
struct ufs_err_reg_hist dme_err;
/* fatal errors */
struct ufs_err_reg_hist fatal_err;
struct ufs_err_reg_hist auto_hibern8_err;
};
/**