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>

1 files changed, 17 insertions, 16 deletions

diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c
index c7e0a42c3d0d..6b85016b4db3 100644
--- 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);