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scsi: ufs: save and print current power info in the driver

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There is no way to know the current working power info of the
driver, so in this patch, we save the power parameters, and we
print them to console.
This printing is necessary, since in case of crash, we can use those
logs to debug and investigate.

Change-Id: If0dc7a695c9b14a369e033e4c31787dcc2254ac3
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
[subhashj@codeaurora.org: resolved merge conflicts]
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
This commit is contained in:
Yaniv Gardi 2013-12-22 21:07:09 +02:00 • committed by David Keitel
parent 0a33bca1b1
commit c6aef9984d
1 changed files with 31 additions and 0 deletions
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31
drivers/scsi/ufs/ufshcd.c
View file

@ -2179,6 +2179,32 @@ out:
return -ENOMEM;
}
/**
* ufshcd_print_pwr_info - print power params as saved in hba
* power info
* @hba: per-adapter instance
*/
static void ufshcd_print_pwr_info(struct ufs_hba *hba)
{
char *names[] = {
"INVALID MODE",
"FAST MODE",
"SLOW_MODE",
"INVALID MODE",
"FASTAUTO_MODE",
"SLOWAUTO_MODE",
"INVALID MODE",
};
dev_info(hba->dev, "%s:[RX, TX]: gear=[%d, %d], lane[%d, %d], pwr[%s, %s], rate = %d\n",
__func__,
hba->pwr_info.gear_rx, hba->pwr_info.gear_tx,
hba->pwr_info.lane_rx, hba->pwr_info.lane_tx,
names[hba->pwr_info.pwr_rx],
names[hba->pwr_info.pwr_tx],
hba->pwr_info.hs_rate);
}
/**
* ufshcd_host_memory_configure - configure local reference block with
* memory offsets
@ -2693,6 +2719,8 @@ static int ufshcd_change_power_mode(struct ufs_hba *hba,
sizeof(struct ufs_pa_layer_attr));
}
ufshcd_print_pwr_info(hba);
return ret;
}
@ -3841,6 +3869,7 @@ static void ufshcd_check_errors(struct ufs_hba *hba)
SYSTEM_BUS_FATAL_ERROR);
ufshcd_print_host_regs(hba);
ufshcd_print_pwr_info(hba);
ufshcd_print_tmrs(hba, hba->outstanding_tasks);
ufshcd_print_trs(hba, hba->outstanding_reqs,
pr_prdt);
@ -4119,6 +4148,7 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
dev_err(hba->dev, "%s: Device abort task at tag %d", __func__, tag);
scsi_print_command(cmd);
ufshcd_print_host_regs(hba);
ufshcd_print_pwr_info(hba);
ufshcd_print_trs(hba, 1 << tag, true);
lrbp = &hba->lrb[tag];
@ -4538,6 +4568,7 @@ static int ufshcd_probe_hba(struct ufs_hba *hba)
goto out;
ufshcd_init_pwr_info(hba);
ufshcd_print_pwr_info(hba);
/* UniPro link is active now */
ufshcd_set_link_active(hba);