From: Deepak Ukey <Deepak.Ukey@microchip.com>
Date: Thu, 14 Nov 2019 15:39:10 +0530
Subject: scsi: pm80xx: Modified the logic to collect fatal dump
Git-commit: 044f59de3a3de9c193cfc600c7a3045b24b3079f
Patch-mainline: v5.5-rc1
References: jsc#SLE-15151, bsc#1178226
Added the correct method to collect the fatal dump.
Link: https://lore.kernel.org/r/20191114100910.6153-14-deepak.ukey@microchip.com
Reported-by: kbuild test robot <lkp@intel.com>
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Deepak Ukey <deepak.ukey@microchip.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
drivers/scsi/pm8001/pm8001_sas.h | 3 +
drivers/scsi/pm8001/pm80xx_hwi.c | 251 ++++++++++++++++++++++++++++++---------
2 files changed, 195 insertions(+), 59 deletions(-)
diff --git a/drivers/scsi/pm8001/pm8001_sas.h b/drivers/scsi/pm8001/pm8001_sas.h
index a55b03bca529..93438c8f67da 100644
--- a/drivers/scsi/pm8001/pm8001_sas.h
+++ b/drivers/scsi/pm8001/pm8001_sas.h
@@ -152,6 +152,8 @@ struct pm8001_ioctl_payload {
#define MPI_FATAL_EDUMP_TABLE_HANDSHAKE 0x0C /* FDDHSHK */
#define MPI_FATAL_EDUMP_TABLE_STATUS 0x10 /* FDDTSTAT */
#define MPI_FATAL_EDUMP_TABLE_ACCUM_LEN 0x14 /* ACCDDLEN */
+#define MPI_FATAL_EDUMP_TABLE_TOTAL_LEN 0x18 /* TOTALLEN */
+#define MPI_FATAL_EDUMP_TABLE_SIGNATURE 0x1C /* SIGNITURE */
#define MPI_FATAL_EDUMP_HANDSHAKE_RDY 0x1
#define MPI_FATAL_EDUMP_HANDSHAKE_BUSY 0x0
#define MPI_FATAL_EDUMP_TABLE_STAT_RSVD 0x0
@@ -507,6 +509,7 @@ struct pm8001_hba_info {
u32 forensic_last_offset;
u32 fatal_forensic_shift_offset;
u32 forensic_fatal_step;
+ u32 forensic_preserved_accumulated_transfer;
u32 evtlog_ib_offset;
u32 evtlog_ob_offset;
void __iomem *msg_unit_tbl_addr;/*Message Unit Table Addr*/
diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
index 5ca9732f4704..19601138e889 100644
--- a/drivers/scsi/pm8001/pm80xx_hwi.c
+++ b/drivers/scsi/pm8001/pm80xx_hwi.c
@@ -76,7 +76,7 @@ void pm80xx_pci_mem_copy(struct pm8001_hba_info *pm8001_ha, u32 soffset,
destination1 = (u32 *)destination;
for (index = 0; index < dw_count; index += 4, destination1++) {
- offset = (soffset + index / 4);
+ offset = (soffset + index);
if (offset < (64 * 1024)) {
value = pm8001_cr32(pm8001_ha, bus_base_number, offset);
*destination1 = cpu_to_le32(value);
@@ -93,9 +93,12 @@ ssize_t pm80xx_get_fatal_dump(struct device *cdev,
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) {
@@ -105,16 +108,35 @@ ssize_t pm80xx_get_fatal_dump(struct device *cdev,
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_IO_DBG(pm8001_ha,
pm8001_printk("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;
- pm8001_ha->forensic_info.data_buf.direct_data = direct_data;
+ /* 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_IO_DBG(pm8001_ha,
+ pm8001_printk("ossaHwCB: status1 %d\n", status));
+ PM8001_IO_DBG(pm8001_ha,
+ pm8001_printk("ossaHwCB: read_len 0x%x\n",
+ pm8001_ha->forensic_info.data_buf.read_len));
+ PM8001_IO_DBG(pm8001_ha,
+ pm8001_printk("ossaHwCB: direct_len 0x%x\n",
+ pm8001_ha->forensic_info.data_buf.direct_len));
+ PM8001_IO_DBG(pm8001_ha,
+ pm8001_printk("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,
@@ -127,30 +149,66 @@ ssize_t pm80xx_get_fatal_dump(struct device *cdev,
/* Read until accum_len is retrived */
accum_len = pm8001_mr32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_ACCUM_LEN);
- PM8001_IO_DBG(pm8001_ha, pm8001_printk("accum_len 0x%x\n",
- 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_IO_DBG(pm8001_ha,
+ pm8001_printk("get_fatal_spcv: accum_len 0x%x\n", accum_len));
+ PM8001_IO_DBG(pm8001_ha,
+ pm8001_printk("get_fatal_spcv: length_to_read 0x%x\n",
+ length_to_read));
+ PM8001_IO_DBG(pm8001_ha,
+ pm8001_printk("get_fatal_spcv: last_offset 0x%x\n",
+ pm8001_ha->forensic_last_offset));
+ PM8001_IO_DBG(pm8001_ha,
+ pm8001_printk("get_fatal_spcv: read_len 0x%x\n",
+ pm8001_ha->forensic_info.data_buf.read_len));
+ PM8001_IO_DBG(pm8001_ha,
+ pm8001_printk("get_fatal_spcv:: direct_len 0x%x\n",
+ pm8001_ha->forensic_info.data_buf.direct_len));
+ PM8001_IO_DBG(pm8001_ha,
+ pm8001_printk("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_IO_DBG(pm8001_ha,
pm8001_printk("Possible PCI issue 0x%x not expected\n",
- accum_len));
- return -EIO;
+ accum_len));
+ return status;
}
- if (accum_len == 0 || accum_len >= 0x100000) {
+ /* 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);
+ "%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);
+ 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;
@@ -161,21 +219,29 @@ ssize_t pm80xx_get_fatal_dump(struct device *cdev,
pm8001_ha->forensic_info.data_buf.read_len =
pm8001_ha->forensic_info.data_buf.direct_len;
- if (pm8001_ha->forensic_last_offset >= accum_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 < (SYSFS_OFFSET / 4); index++) {
+ 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));
+ 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_IO_DBG(pm8001_ha,
+ pm8001_printk("get_fatal_spcv:return1 0x%x\n", offset));
return (char *)pm8001_ha->
forensic_info.data_buf.direct_data -
(char *)buf;
@@ -185,12 +251,20 @@ ssize_t pm80xx_get_fatal_dump(struct device *cdev,
sprintf(pm8001_ha->
forensic_info.data_buf.direct_data,
"%08x ", 2);
- for (index = 0; index < (SYSFS_OFFSET / 4); index++) {
- pm8001_ha->forensic_info.data_buf.direct_data +=
- sprintf(pm8001_ha->
+ 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_IO_DBG(pm8001_ha,
+ pm8001_printk("get_fatal_spcv:return2 0x%x\n", offset));
return (char *)pm8001_ha->
forensic_info.data_buf.direct_data -
(char *)buf;
@@ -200,63 +274,122 @@ ssize_t pm80xx_get_fatal_dump(struct device *cdev,
pm8001_ha->forensic_info.data_buf.direct_data +=
sprintf(pm8001_ha->forensic_info.data_buf.direct_data,
"%08x ", 2);
- for (index = 0; index < 256; index++) {
+ 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));
+ 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_IO_DBG(pm8001_ha,
+ pm8001_printk("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) {
- pm8001_ha->fatal_forensic_shift_offset = 0;
- /* Read 64K of the debug data. */
- pm8001_cw32(pm8001_ha, 0, MEMBASE_II_SHIFT_REGISTER,
- pm8001_ha->fatal_forensic_shift_offset);
- pm8001_mw32(fatal_table_address,
- MPI_FATAL_EDUMP_TABLE_HANDSHAKE,
+ /* 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 */
+ /*Poll FDDHSHK until clear */
+ start = jiffies + (2 * HZ); /* 2 sec */
- do {
- reg_val = pm8001_mr32(fatal_table_address,
+ do {
+ reg_val = pm8001_mr32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_HANDSHAKE);
- } while ((reg_val) && time_before(jiffies, start));
+ } while ((reg_val) && time_before(jiffies, start));
- if (reg_val != 0) {
- PM8001_FAIL_DBG(pm8001_ha,
- pm8001_printk("TIMEOUT:MEMBASE_II_SHIFT_REGISTER"
- " = 0x%x\n", reg_val));
- return -EIO;
- }
-
- /* Read the next 64K of the debug data. */
- pm8001_ha->forensic_fatal_step = 0;
- if (pm8001_mr32(fatal_table_address,
- MPI_FATAL_EDUMP_TABLE_STATUS) !=
- MPI_FATAL_EDUMP_TABLE_STAT_NF_SUCCESS_DONE) {
- pm8001_mw32(fatal_table_address,
- MPI_FATAL_EDUMP_TABLE_HANDSHAKE, 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;
+ if (reg_val != 0) {
+ PM8001_FAIL_DBG(pm8001_ha, pm8001_printk(
+ "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_FAIL_DBG(pm8001_ha, pm8001_printk(
+ "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);
+ 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_IO_DBG(pm8001_ha,
+ pm8001_printk("get_fatal_spcv: return4 0x%x\n", offset));
return (char *)pm8001_ha->forensic_info.data_buf.direct_data -
(char *)buf;
}