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scsi: pm80xx: Fixed system hang issue during kexec boot 

When the firmware is not responding, execution of kexec boot causes a system
hang. When firmware assertion happened, driver get notified with interrupt
vector updated in MPI configuration table. Then, the driver will read
scratchpad register and set controller_fatal_error flag to true.

Signed-off-by: Deepak Ukey <deepak.ukey@microchip.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Acked-by: Jack Wang <jinpu.wang@profitbricks.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Deepak Ukey 2018-09-11 14:18:04 +05:30 committed by Martin K. Petersen
parent 76cb25b058
commit 72349b62a5
5 changed files with 91 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/scsi/pm8001/pm8001_hwi.c
View File

@ -1479,6 +1479,12 @@ u32 pm8001_mpi_msg_consume(struct pm8001_hba_info *pm8001_ha,
} else {
u32 producer_index;
void *pi_virt = circularQ->pi_virt;
/* spurious interrupt during setup if
* kexec-ing and driver doing a doorbell access
* with the pre-kexec oq interrupt setup
*/
if (!pi_virt)
break;
/* Update the producer index from SPC */
producer_index = pm8001_read_32(pi_virt);
circularQ->producer_index = cpu_to_le32(producer_index);

7
drivers/scsi/pm8001/pm8001_sas.c
View File

@ -396,6 +396,13 @@ static int pm8001_task_exec(struct sas_task *task,
return 0;
}
pm8001_ha = pm8001_find_ha_by_dev(task->dev);
if (pm8001_ha->controller_fatal_error) {
struct task_status_struct *ts = &t->task_status;
ts->resp = SAS_TASK_UNDELIVERED;
t->task_done(t);
return 0;
}
PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
spin_lock_irqsave(&pm8001_ha->lock, flags);
do {

1
drivers/scsi/pm8001/pm8001_sas.h
View File

@ -538,6 +538,7 @@ struct pm8001_hba_info {
u32 logging_level;
u32 fw_status;
u32 smp_exp_mode;
bool controller_fatal_error;
const struct firmware *fw_image;
struct isr_param irq_vector[PM8001_MAX_MSIX_VEC];
u32 reset_in_progress;

80
drivers/scsi/pm8001/pm80xx_hwi.c
View File

@ -577,6 +577,9 @@ static void update_main_config_table(struct pm8001_hba_info *pm8001_ha)
pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_size);
pm8001_mw32(address, MAIN_PCS_EVENT_LOG_OPTION,
pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_severity);
/* Update Fatal error interrupt vector */
pm8001_ha->main_cfg_tbl.pm80xx_tbl.fatal_err_interrupt |=
((pm8001_ha->number_of_intr - 1) << 8);
pm8001_mw32(address, MAIN_FATAL_ERROR_INTERRUPT,
pm8001_ha->main_cfg_tbl.pm80xx_tbl.fatal_err_interrupt);
pm8001_mw32(address, MAIN_EVENT_CRC_CHECK,
@ -1110,6 +1113,9 @@ static int pm80xx_chip_init(struct pm8001_hba_info *pm8001_ha)
return -EBUSY;
}
/* Initialize the controller fatal error flag */
pm8001_ha->controller_fatal_error = false;
/* Initialize pci space address eg: mpi offset */
init_pci_device_addresses(pm8001_ha);
init_default_table_values(pm8001_ha);
@ -1218,13 +1224,17 @@ pm80xx_chip_soft_rst(struct pm8001_hba_info *pm8001_ha)
u32 bootloader_state;
u32 ibutton0, ibutton1;
/* Check if MPI is in ready state to reset */
if (mpi_uninit_check(pm8001_ha) != 0) {
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MPI state is not ready\n"));
return -1;
/* Process MPI table uninitialization only if FW is ready */
if (!pm8001_ha->controller_fatal_error) {
/* Check if MPI is in ready state to reset */
if (mpi_uninit_check(pm8001_ha) != 0) {
regval = pm8001_cr32(pm8001_ha, 0, MSGU_SCRATCH_PAD_1);
PM8001_FAIL_DBG(pm8001_ha, pm8001_printk(
"MPI state is not ready scratch1 :0x%x\n",
regval));
return -1;
}
}
/* checked for reset register normal state; 0x0 */
regval = pm8001_cr32(pm8001_ha, 0, SPC_REG_SOFT_RESET);
PM8001_INIT_DBG(pm8001_ha,
@ -3754,6 +3764,46 @@ static void process_one_iomb(struct pm8001_hba_info *pm8001_ha, void *piomb)
}
}
static void print_scratchpad_registers(struct pm8001_hba_info *pm8001_ha)
{
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_SCRATCH_PAD_0: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_SCRATCH_PAD_0)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_SCRATCH_PAD_1:0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_SCRATCH_PAD_1)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_SCRATCH_PAD_2: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_SCRATCH_PAD_2)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_SCRATCH_PAD_3: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_SCRATCH_PAD_3)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_HOST_SCRATCH_PAD_0: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_HOST_SCRATCH_PAD_0)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_HOST_SCRATCH_PAD_1: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_HOST_SCRATCH_PAD_1)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_HOST_SCRATCH_PAD_2: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_HOST_SCRATCH_PAD_2)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_HOST_SCRATCH_PAD_3: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_HOST_SCRATCH_PAD_3)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_HOST_SCRATCH_PAD_4: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_HOST_SCRATCH_PAD_4)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_HOST_SCRATCH_PAD_5: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_HOST_SCRATCH_PAD_5)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_RSVD_SCRATCH_PAD_0: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_HOST_SCRATCH_PAD_6)));
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("MSGU_RSVD_SCRATCH_PAD_1: 0x%x\n",
pm8001_cr32(pm8001_ha, 0, MSGU_HOST_SCRATCH_PAD_7)));
}
static int process_oq(struct pm8001_hba_info *pm8001_ha, u8 vec)
{
struct outbound_queue_table *circularQ;
@ -3761,10 +3811,28 @@ static int process_oq(struct pm8001_hba_info *pm8001_ha, u8 vec)
u8 uninitialized_var(bc);
u32 ret = MPI_IO_STATUS_FAIL;
unsigned long flags;
u32 regval;
if (vec == (pm8001_ha->number_of_intr - 1)) {
regval = pm8001_cr32(pm8001_ha, 0, MSGU_SCRATCH_PAD_1);
if ((regval & SCRATCH_PAD_MIPSALL_READY) !=
SCRATCH_PAD_MIPSALL_READY) {
pm8001_ha->controller_fatal_error = true;
PM8001_FAIL_DBG(pm8001_ha, pm8001_printk(
"Firmware Fatal error! Regval:0x%x\n", regval));
print_scratchpad_registers(pm8001_ha);
return ret;
}
}
spin_lock_irqsave(&pm8001_ha->lock, flags);
circularQ = &pm8001_ha->outbnd_q_tbl[vec];
do {
/* spurious interrupt during setup if kexec-ing and
* driver doing a doorbell access w/ the pre-kexec oq
* interrupt setup.
*/
if (!circularQ->pi_virt)
break;
ret = pm8001_mpi_msg_consume(pm8001_ha, circularQ, &pMsg1, &bc);
if (MPI_IO_STATUS_SUCCESS == ret) {
/* process the outbound message */

3
drivers/scsi/pm8001/pm80xx_hwi.h
View File

@ -1386,6 +1386,9 @@ typedef struct SASProtocolTimerConfig SASProtocolTimerConfig_t;
#define SCRATCH_PAD_BOOT_LOAD_SUCCESS 0x0
#define SCRATCH_PAD_IOP0_READY 0xC00
#define SCRATCH_PAD_IOP1_READY 0x3000
#define SCRATCH_PAD_MIPSALL_READY (SCRATCH_PAD_IOP1_READY | \
SCRATCH_PAD_IOP0_READY | \
SCRATCH_PAD_RAAE_READY)
/* boot loader state */
#define SCRATCH_PAD1_BOOTSTATE_MASK 0x70 /* Bit 4-6 */