in pm8001/pm80xx_hwi.c [87:384]
ssize_t pm80xx_get_fatal_dump(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;
void __iomem *fatal_table_address = pm8001_ha->fatal_tbl_addr;
u32 accum_len, reg_val, index, *temp;
u32 status = 1;
unsigned long start;
u8 *direct_data;
char *fatal_error_data = buf;
u32 length_to_read;
u32 offset;
pm8001_ha->forensic_info.data_buf.direct_data = buf;
if (pm8001_ha->chip_id == chip_8001) {
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(pm8001_ha->forensic_info.data_buf.direct_data,
"Not supported for SPC controller");
return (char *)pm8001_ha->forensic_info.data_buf.direct_data -
(char *)buf;
}
/* initialize variables for very first call from host application */
if (pm8001_ha->forensic_info.data_buf.direct_offset == 0) {
pm8001_dbg(pm8001_ha, IO,
"forensic_info TYPE_NON_FATAL..............\n");
direct_data = (u8 *)fatal_error_data;
pm8001_ha->forensic_info.data_type = TYPE_NON_FATAL;
pm8001_ha->forensic_info.data_buf.direct_len = SYSFS_OFFSET;
pm8001_ha->forensic_info.data_buf.direct_offset = 0;
pm8001_ha->forensic_info.data_buf.read_len = 0;
pm8001_ha->forensic_preserved_accumulated_transfer = 0;
/* Write signature to fatal dump table */
pm8001_mw32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_SIGNATURE, 0x1234abcd);
pm8001_ha->forensic_info.data_buf.direct_data = direct_data;
pm8001_dbg(pm8001_ha, IO, "ossaHwCB: status1 %d\n", status);
pm8001_dbg(pm8001_ha, IO, "ossaHwCB: read_len 0x%x\n",
pm8001_ha->forensic_info.data_buf.read_len);
pm8001_dbg(pm8001_ha, IO, "ossaHwCB: direct_len 0x%x\n",
pm8001_ha->forensic_info.data_buf.direct_len);
pm8001_dbg(pm8001_ha, IO, "ossaHwCB: direct_offset 0x%x\n",
pm8001_ha->forensic_info.data_buf.direct_offset);
}
if (pm8001_ha->forensic_info.data_buf.direct_offset == 0) {
/* start to get data */
/* Program the MEMBASE II Shifting Register with 0x00.*/
pm8001_cw32(pm8001_ha, 0, MEMBASE_II_SHIFT_REGISTER,
pm8001_ha->fatal_forensic_shift_offset);
pm8001_ha->forensic_last_offset = 0;
pm8001_ha->forensic_fatal_step = 0;
pm8001_ha->fatal_bar_loc = 0;
}
/* Read until accum_len is retrieved */
accum_len = pm8001_mr32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_ACCUM_LEN);
/* Determine length of data between previously stored transfer length
* and current accumulated transfer length
*/
length_to_read =
accum_len - pm8001_ha->forensic_preserved_accumulated_transfer;
pm8001_dbg(pm8001_ha, IO, "get_fatal_spcv: accum_len 0x%x\n",
accum_len);
pm8001_dbg(pm8001_ha, IO, "get_fatal_spcv: length_to_read 0x%x\n",
length_to_read);
pm8001_dbg(pm8001_ha, IO, "get_fatal_spcv: last_offset 0x%x\n",
pm8001_ha->forensic_last_offset);
pm8001_dbg(pm8001_ha, IO, "get_fatal_spcv: read_len 0x%x\n",
pm8001_ha->forensic_info.data_buf.read_len);
pm8001_dbg(pm8001_ha, IO, "get_fatal_spcv:: direct_len 0x%x\n",
pm8001_ha->forensic_info.data_buf.direct_len);
pm8001_dbg(pm8001_ha, IO, "get_fatal_spcv:: direct_offset 0x%x\n",
pm8001_ha->forensic_info.data_buf.direct_offset);
/* If accumulated length failed to read correctly fail the attempt.*/
if (accum_len == 0xFFFFFFFF) {
pm8001_dbg(pm8001_ha, IO,
"Possible PCI issue 0x%x not expected\n",
accum_len);
return status;
}
/* If accumulated length is zero fail the attempt */
if (accum_len == 0) {
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(pm8001_ha->forensic_info.data_buf.direct_data,
"%08x ", 0xFFFFFFFF);
return (char *)pm8001_ha->forensic_info.data_buf.direct_data -
(char *)buf;
}
/* Accumulated length is good so start capturing the first data */
temp = (u32 *)pm8001_ha->memoryMap.region[FORENSIC_MEM].virt_ptr;
if (pm8001_ha->forensic_fatal_step == 0) {
moreData:
/* If data to read is less than SYSFS_OFFSET then reduce the
* length of dataLen
*/
if (pm8001_ha->forensic_last_offset + SYSFS_OFFSET
> length_to_read) {
pm8001_ha->forensic_info.data_buf.direct_len =
length_to_read -
pm8001_ha->forensic_last_offset;
} else {
pm8001_ha->forensic_info.data_buf.direct_len =
SYSFS_OFFSET;
}
if (pm8001_ha->forensic_info.data_buf.direct_data) {
/* Data is in bar, copy to host memory */
pm80xx_pci_mem_copy(pm8001_ha,
pm8001_ha->fatal_bar_loc,
pm8001_ha->memoryMap.region[FORENSIC_MEM].virt_ptr,
pm8001_ha->forensic_info.data_buf.direct_len, 1);
}
pm8001_ha->fatal_bar_loc +=
pm8001_ha->forensic_info.data_buf.direct_len;
pm8001_ha->forensic_info.data_buf.direct_offset +=
pm8001_ha->forensic_info.data_buf.direct_len;
pm8001_ha->forensic_last_offset +=
pm8001_ha->forensic_info.data_buf.direct_len;
pm8001_ha->forensic_info.data_buf.read_len =
pm8001_ha->forensic_info.data_buf.direct_len;
if (pm8001_ha->forensic_last_offset >= length_to_read) {
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(pm8001_ha->forensic_info.data_buf.direct_data,
"%08x ", 3);
for (index = 0; index <
(pm8001_ha->forensic_info.data_buf.direct_len
/ 4); index++) {
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(
pm8001_ha->forensic_info.data_buf.direct_data,
"%08x ", *(temp + index));
}
pm8001_ha->fatal_bar_loc = 0;
pm8001_ha->forensic_fatal_step = 1;
pm8001_ha->fatal_forensic_shift_offset = 0;
pm8001_ha->forensic_last_offset = 0;
status = 0;
offset = (int)
((char *)pm8001_ha->forensic_info.data_buf.direct_data
- (char *)buf);
pm8001_dbg(pm8001_ha, IO,
"get_fatal_spcv:return1 0x%x\n", offset);
return (char *)pm8001_ha->
forensic_info.data_buf.direct_data -
(char *)buf;
}
if (pm8001_ha->fatal_bar_loc < (64 * 1024)) {
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(pm8001_ha->
forensic_info.data_buf.direct_data,
"%08x ", 2);
for (index = 0; index <
(pm8001_ha->forensic_info.data_buf.direct_len
/ 4); index++) {
pm8001_ha->forensic_info.data_buf.direct_data
+= sprintf(pm8001_ha->
forensic_info.data_buf.direct_data,
"%08x ", *(temp + index));
}
status = 0;
offset = (int)
((char *)pm8001_ha->forensic_info.data_buf.direct_data
- (char *)buf);
pm8001_dbg(pm8001_ha, IO,
"get_fatal_spcv:return2 0x%x\n", offset);
return (char *)pm8001_ha->
forensic_info.data_buf.direct_data -
(char *)buf;
}
/* Increment the MEMBASE II Shifting Register value by 0x100.*/
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(pm8001_ha->forensic_info.data_buf.direct_data,
"%08x ", 2);
for (index = 0; index <
(pm8001_ha->forensic_info.data_buf.direct_len
/ 4) ; index++) {
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(pm8001_ha->
forensic_info.data_buf.direct_data,
"%08x ", *(temp + index));
}
pm8001_ha->fatal_forensic_shift_offset += 0x100;
pm8001_cw32(pm8001_ha, 0, MEMBASE_II_SHIFT_REGISTER,
pm8001_ha->fatal_forensic_shift_offset);
pm8001_ha->fatal_bar_loc = 0;
status = 0;
offset = (int)
((char *)pm8001_ha->forensic_info.data_buf.direct_data
- (char *)buf);
pm8001_dbg(pm8001_ha, IO, "get_fatal_spcv: return3 0x%x\n",
offset);
return (char *)pm8001_ha->forensic_info.data_buf.direct_data -
(char *)buf;
}
if (pm8001_ha->forensic_fatal_step == 1) {
/* store previous accumulated length before triggering next
* accumulated length update
*/
pm8001_ha->forensic_preserved_accumulated_transfer =
pm8001_mr32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_ACCUM_LEN);
/* continue capturing the fatal log until Dump status is 0x3 */
if (pm8001_mr32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_STATUS) <
MPI_FATAL_EDUMP_TABLE_STAT_NF_SUCCESS_DONE) {
/* reset fddstat bit by writing to zero*/
pm8001_mw32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_STATUS, 0x0);
/* set dump control value to '1' so that new data will
* be transferred to shared memory
*/
pm8001_mw32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_HANDSHAKE,
MPI_FATAL_EDUMP_HANDSHAKE_RDY);
/*Poll FDDHSHK until clear */
start = jiffies + (2 * HZ); /* 2 sec */
do {
reg_val = pm8001_mr32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_HANDSHAKE);
} while ((reg_val) && time_before(jiffies, start));
if (reg_val != 0) {
pm8001_dbg(pm8001_ha, FAIL,
"TIMEOUT:MPI_FATAL_EDUMP_TABLE_HDSHAKE 0x%x\n",
reg_val);
/* Fail the dump if a timeout occurs */
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(
pm8001_ha->forensic_info.data_buf.direct_data,
"%08x ", 0xFFFFFFFF);
return((char *)
pm8001_ha->forensic_info.data_buf.direct_data
- (char *)buf);
}
/* Poll status register until set to 2 or
* 3 for up to 2 seconds
*/
start = jiffies + (2 * HZ); /* 2 sec */
do {
reg_val = pm8001_mr32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_STATUS);
} while (((reg_val != 2) && (reg_val != 3)) &&
time_before(jiffies, start));
if (reg_val < 2) {
pm8001_dbg(pm8001_ha, FAIL,
"TIMEOUT:MPI_FATAL_EDUMP_TABLE_STATUS = 0x%x\n",
reg_val);
/* Fail the dump if a timeout occurs */
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(
pm8001_ha->forensic_info.data_buf.direct_data,
"%08x ", 0xFFFFFFFF);
return((char *)pm8001_ha->forensic_info.data_buf.direct_data -
(char *)buf);
}
/* reset fatal_forensic_shift_offset back to zero and reset MEMBASE 2 register to zero */
pm8001_ha->fatal_forensic_shift_offset = 0; /* location in 64k region */
pm8001_cw32(pm8001_ha, 0,
MEMBASE_II_SHIFT_REGISTER,
pm8001_ha->fatal_forensic_shift_offset);
}
/* Read the next block of the debug data.*/
length_to_read = pm8001_mr32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_ACCUM_LEN) -
pm8001_ha->forensic_preserved_accumulated_transfer;
if (length_to_read != 0x0) {
pm8001_ha->forensic_fatal_step = 0;
goto moreData;
} else {
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(pm8001_ha->forensic_info.data_buf.direct_data,
"%08x ", 4);
pm8001_ha->forensic_info.data_buf.read_len = 0xFFFFFFFF;
pm8001_ha->forensic_info.data_buf.direct_len = 0;
pm8001_ha->forensic_info.data_buf.direct_offset = 0;
pm8001_ha->forensic_info.data_buf.read_len = 0;
}
}
offset = (int)((char *)pm8001_ha->forensic_info.data_buf.direct_data
- (char *)buf);
pm8001_dbg(pm8001_ha, IO, "get_fatal_spcv: return4 0x%x\n", offset);
return ((char *)pm8001_ha->forensic_info.data_buf.direct_data -
(char *)buf);
}