[SCSI] mpt fusion: Add Firmware debug support

Signed-off-by: Kashyap Desai <kadesai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

3 files changed, 43 insertions, 0 deletions

diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 787a12648dbc..96ac88317b8e 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -107,6 +107,14 @@ module_param_call(mpt_debug_level, mpt_set_debug_level, param_get_int,
 MODULE_PARM_DESC(mpt_debug_level, " debug level - refer to mptdebug.h \
         - (default=0)");
 
+int mpt_fwfault_debug;
+EXPORT_SYMBOL(mpt_fwfault_debug);
+module_param_call(mpt_fwfault_debug, param_set_int, param_get_int,
+          &mpt_fwfault_debug, 0600);
+MODULE_PARM_DESC(mpt_fwfault_debug, "Enable detection of Firmware fault"
+        " and halt Firmware on fault - (default=0)");
+
+
 
 #ifdef MFCNT
 static int mfcounter = 0;
@@ -6337,6 +6345,33 @@ mpt_print_ioc_summary(MPT_ADAPTER *ioc, char *buffer, int *size, int len, int sh
         *size = y;
 }
 
+
+/**
+ *      mpt_halt_firmware - Halts the firmware if it is operational and panic
+ *      the kernel
+ *      @ioc: Pointer to MPT_ADAPTER structure
+ *
+ **/
+void
+mpt_halt_firmware(MPT_ADAPTER *ioc)
+{
+        u32      ioc_raw_state;
+
+        ioc_raw_state = mpt_GetIocState(ioc, 0);
+
+        if ((ioc_raw_state & MPI_IOC_STATE_MASK) == MPI_IOC_STATE_FAULT) {
+                printk(MYIOC_s_ERR_FMT "IOC is in FAULT state (%04xh)!!!\n",
+                        ioc->name, ioc_raw_state & MPI_DOORBELL_DATA_MASK);
+                panic("%s: IOC Fault (%04xh)!!!\n", ioc->name,
+                        ioc_raw_state & MPI_DOORBELL_DATA_MASK);
+        } else {
+                CHIPREG_WRITE32(&ioc->chip->Doorbell, 0xC0FFEE00);
+                panic("%s: Firmware is halted due to command timeout\n",
+                        ioc->name);
+        }
+}
+EXPORT_SYMBOL(mpt_halt_firmware);
+
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 /*
  *      Reset Handling
@@ -6369,6 +6404,8 @@ mpt_HardResetHandler(MPT_ADAPTER *ioc, int sleepFlag)
         printk(MYIOC_s_INFO_FMT "HardResetHandler Entered!\n", ioc->name);
         printk("MF count 0x%x !\n", ioc->mfcnt);
 #endif
+        if (mpt_fwfault_debug)
+                mpt_halt_firmware(ioc);
 
         /* Reset the adapter. Prevent more than 1 call to
          * mpt_do_ioc_recovery at any instant in time.
diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index dff048cfa101..b3e981d2a506 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -922,11 +922,14 @@ extern void	 mpt_free_fw_memory(MPT_ADAPTER *ioc);
 extern int       mpt_findImVolumes(MPT_ADAPTER *ioc);
 extern int       mptbase_sas_persist_operation(MPT_ADAPTER *ioc, u8 persist_opcode);
 extern int       mpt_raid_phys_disk_pg0(MPT_ADAPTER *ioc, u8 phys_disk_num, pRaidPhysDiskPage0_t phys_disk);
+extern void     mpt_halt_firmware(MPT_ADAPTER *ioc);
+
 
 /*
  *  Public data decl's...
  */
 extern struct list_head   ioc_list;
+extern int mpt_fwfault_debug;
 
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 #endif          /* } __KERNEL__ */
diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c
index ee090413e598..e62c6bc4ad33 100644
--- a/drivers/message/fusion/mptscsih.c
+++ b/drivers/message/fusion/mptscsih.c
@@ -1846,6 +1846,9 @@ mptscsih_abort(struct scsi_cmnd * SCpnt)
         if (hd->timeouts < -1)
                 hd->timeouts++;
 
+        if (mpt_fwfault_debug)
+                mpt_halt_firmware(ioc);
+
         /* Most important!  Set TaskMsgContext to SCpnt's MsgContext!
          * (the IO to be ABORT'd)
          *