scsi: pm80xx: Modified the logic to collect IOP event logs

Added the logic for collecting IOP log respective to event log size.

Signed-off-by: Deepak Ukey <deepak.ukey@microchip.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Reviewed-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c
index c7e0a42..6b85016 100644 (file)
--- a/drivers/scsi/pm8001/pm8001_ctl.c
+++ b/drivers/scsi/pm8001/pm8001_ctl.c
@@ -492,25 +492,26 @@ static ssize_t pm8001_ctl_iop_log_show(struct device *cdev,
        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;
-#define IOP_MEMMAP(r, c) \
-       (*(u32 *)((u8*)pm8001_ha->memoryMap.region[IOP].virt_ptr + (r) * 32 \
-       + (c)))
-       int i;
        char *str = buf;
-       int max = 2;
-       for (i = 0; i < max; i++) {
-               str += sprintf(str, "0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x"
-                              "0x%08x 0x%08x\n",
-                              IOP_MEMMAP(i, 0),
-                              IOP_MEMMAP(i, 4),
-                              IOP_MEMMAP(i, 8),
-                              IOP_MEMMAP(i, 12),
-                              IOP_MEMMAP(i, 16),
-                              IOP_MEMMAP(i, 20),
-                              IOP_MEMMAP(i, 24),
-                              IOP_MEMMAP(i, 28));
+       u32 read_size =
+               pm8001_ha->main_cfg_tbl.pm80xx_tbl.event_log_size / 1024;
+       static u32 start, end, count;
+       u32 max_read_times = 32;
+       u32 max_count = (read_size * 1024) / (max_read_times * 4);
+       u32 *temp = (u32 *)pm8001_ha->memoryMap.region[IOP].virt_ptr;
+
+       if ((count % max_count) == 0) {
+               start = 0;
+               end = max_read_times;
+               count = 0;
+       } else {
+               start = end;
+               end = end + max_read_times;
        }
 
+       for (; start < end; start++)
+               str += sprintf(str, "%08x ", *(temp+start));
+       count++;
        return str - buf;
 }
 static DEVICE_ATTR(iop_log, S_IRUGO, pm8001_ctl_iop_log_show, NULL);