On Tue, Mar 30, 2021 at 8:30 AM Viswas G <Viswas.G@xxxxxxxxxxxxx> wrote:
>
> From: Vishakha Channapattan <vishakhavc@xxxxxxxxxx>
>
> A new sysfs variable 'ctl_mpi_state' is being introduced to
> check the state of mpi.
>
> Tested: Using 'ctl_mpi_state' sysfs variable we check the mpi state
> mvae14:~# cat /sys/class/scsi_host/host*/ctl_mpi_state
> MPI-S=MPI is successfully initialized HMI_ERR=0
> MPI-S=MPI is successfully initialized HMI_ERR=0
>
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Signed-off-by: Vishakha Channapattan <vishakhavc@xxxxxxxxxx>
> Signed-off-by: Viswas G <Viswas.G@xxxxxxxxxxxxx>
> Signed-off-by: Ruksar Devadi <Ruksar.devadi@xxxxxxxxxxxxx>
> Signed-off-by: Ashokkumar N <Ashokkumar.N@xxxxxxxxxxxxx>
> Signed-off-by: Radha Ramachandran <radha@xxxxxxxxxx>
> Signed-off-by: kernel test robot <lkp@xxxxxxxxx>
Acked-by: Jack Wang <jinpu.wang@xxxxxxxxx>
> ---
> drivers/scsi/pm8001/pm8001_ctl.c | 35 ++++++++++++++++++++++++++++++++++-
> 1 file changed, 34 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c
> index 12035baf0997..6b6b774c455e 100644
> --- a/drivers/scsi/pm8001/pm8001_ctl.c
> +++ b/drivers/scsi/pm8001/pm8001_ctl.c
> @@ -41,6 +41,7 @@
> #include <linux/slab.h>
> #include "pm8001_sas.h"
> #include "pm8001_ctl.h"
> +#include "pm8001_chips.h"
>
> /* scsi host attributes */
>
> @@ -883,9 +884,40 @@ static ssize_t pm8001_show_update_fw(struct device *cdev,
> flash_error_table[i].err_code,
> flash_error_table[i].reason);
> }
> -
> static DEVICE_ATTR(update_fw, S_IRUGO|S_IWUSR|S_IWGRP,
> pm8001_show_update_fw, pm8001_store_update_fw);
> +
> +/**
> + * ctl_mpi_state_show - controller MPI state check
> + * @cdev: pointer to embedded class device
> + * @buf: the buffer returned
> + *
> + * A sysfs 'read-only' shost attribute.
> + */
> +
> +static char mpiStateText[][80] = {
> + "MPI is not initialized",
> + "MPI is successfully initialized",
> + "MPI termination is in progress",
> + "MPI initialization failed with error in [31:16]"
> +};
> +
> +static ssize_t ctl_mpi_state_show(struct device *cdev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct Scsi_Host *shost = class_to_shost(cdev);
> + struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
> + struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
> + unsigned int mpidw0;
> + int c;
> +
> + mpidw0 = pm8001_mr32(pm8001_ha->general_stat_tbl_addr, 0);
> + c = sysfs_emit(buf, "MPI-S=%s\t HMI_ERR=%x\n", mpiStateText[mpidw0 & 0x0003],
> + (mpidw0 >> 16));
> + return c;
> +}
> +static DEVICE_ATTR_RO(ctl_mpi_state);
> +
> struct device_attribute *pm8001_host_attrs[] = {
> &dev_attr_interface_rev,
> &dev_attr_controller_fatal_error,
> @@ -909,6 +941,7 @@ struct device_attribute *pm8001_host_attrs[] = {
> &dev_attr_ob_log,
> &dev_attr_ila_version,
> &dev_attr_inc_fw_ver,
> + &dev_attr_ctl_mpi_state,
> NULL,
> };
>
> --
> 2.16.3
>
