[PATCH 16/18] scsi: hisi_sas: Add ability to have multiple debugfs dumps
From: John Garry
Date: Mon Oct 21 2019 - 12:25:35 EST
From: Luo Jiaxing <luojiaxing@xxxxxxxxxx>
We use the module parameter debugfs_dump_count to manage the upper limit
of the memory block for multiple dumps.
Signed-off-by: Luo Jiaxing <luojiaxing@xxxxxxxxxx>
Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
---
drivers/scsi/hisi_sas/hisi_sas.h | 5 +-
drivers/scsi/hisi_sas/hisi_sas_main.c | 73 ++++++++++++++++-----------
2 files changed, 45 insertions(+), 33 deletions(-)
diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
index bdd4aa7ed730..72823222e08f 100644
--- a/drivers/scsi/hisi_sas/hisi_sas.h
+++ b/drivers/scsi/hisi_sas/hisi_sas.h
@@ -451,12 +451,11 @@ struct hisi_hba {
struct hisi_sas_debugfs_iost_cache debugfs_iost_cache[HISI_SAS_MAX_DEBUGFS_DUMP];
struct hisi_sas_debugfs_itct_cache debugfs_itct_cache[HISI_SAS_MAX_DEBUGFS_DUMP];
- u64 debugfs_timestamp;
-
+ u64 debugfs_timestamp[HISI_SAS_MAX_DEBUGFS_DUMP];
+ int debugfs_dump_index;
struct dentry *debugfs_dir;
struct dentry *debugfs_dump_dentry;
struct dentry *debugfs_bist_dentry;
- bool debugfs_snapshot;
};
/* Generic HW DMA host memory structures */
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 57723b0fc025..f6ee8db6298f 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -2697,10 +2697,11 @@ struct dentry *hisi_sas_debugfs_dir;
static void hisi_sas_debugfs_snapshot_cq_reg(struct hisi_hba *hisi_hba)
{
int queue_entry_size = hisi_hba->hw->complete_hdr_size;
+ int dump_index = hisi_hba->debugfs_dump_index;
int i;
for (i = 0; i < hisi_hba->queue_count; i++)
- memcpy(hisi_hba->debugfs_cq[0][i].complete_hdr,
+ memcpy(hisi_hba->debugfs_cq[dump_index][i].complete_hdr,
hisi_hba->complete_hdr[i],
HISI_SAS_QUEUE_SLOTS * queue_entry_size);
}
@@ -2708,13 +2709,14 @@ static void hisi_sas_debugfs_snapshot_cq_reg(struct hisi_hba *hisi_hba)
static void hisi_sas_debugfs_snapshot_dq_reg(struct hisi_hba *hisi_hba)
{
int queue_entry_size = sizeof(struct hisi_sas_cmd_hdr);
+ int dump_index = hisi_hba->debugfs_dump_index;
int i;
for (i = 0; i < hisi_hba->queue_count; i++) {
struct hisi_sas_cmd_hdr *debugfs_cmd_hdr, *cmd_hdr;
int j;
- debugfs_cmd_hdr = hisi_hba->debugfs_dq[0][i].hdr;
+ debugfs_cmd_hdr = hisi_hba->debugfs_dq[dump_index][i].hdr;
cmd_hdr = hisi_hba->cmd_hdr[i];
for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
@@ -2725,6 +2727,7 @@ static void hisi_sas_debugfs_snapshot_dq_reg(struct hisi_hba *hisi_hba)
static void hisi_sas_debugfs_snapshot_port_reg(struct hisi_hba *hisi_hba)
{
+ int dump_index = hisi_hba->debugfs_dump_index;
const struct hisi_sas_debugfs_reg *port =
hisi_hba->hw->debugfs_reg_port;
int i, phy_cnt;
@@ -2732,7 +2735,7 @@ static void hisi_sas_debugfs_snapshot_port_reg(struct hisi_hba *hisi_hba)
u32 *databuf;
for (phy_cnt = 0; phy_cnt < hisi_hba->n_phy; phy_cnt++) {
- databuf = hisi_hba->debugfs_port_reg[0][phy_cnt].data;
+ databuf = hisi_hba->debugfs_port_reg[dump_index][phy_cnt].data;
for (i = 0; i < port->count; i++, databuf++) {
offset = port->base_off + 4 * i;
*databuf = port->read_port_reg(hisi_hba, phy_cnt,
@@ -2743,7 +2746,8 @@ static void hisi_sas_debugfs_snapshot_port_reg(struct hisi_hba *hisi_hba)
static void hisi_sas_debugfs_snapshot_global_reg(struct hisi_hba *hisi_hba)
{
- u32 *databuf = hisi_hba->debugfs_regs[0][DEBUGFS_GLOBAL].data;
+ int dump_index = hisi_hba->debugfs_dump_index;
+ u32 *databuf = hisi_hba->debugfs_regs[dump_index][DEBUGFS_GLOBAL].data;
const struct hisi_sas_hw *hw = hisi_hba->hw;
const struct hisi_sas_debugfs_reg *global =
hw->debugfs_reg_array[DEBUGFS_GLOBAL];
@@ -2755,7 +2759,8 @@ static void hisi_sas_debugfs_snapshot_global_reg(struct hisi_hba *hisi_hba)
static void hisi_sas_debugfs_snapshot_axi_reg(struct hisi_hba *hisi_hba)
{
- u32 *databuf = hisi_hba->debugfs_regs[0][DEBUGFS_AXI].data;
+ int dump_index = hisi_hba->debugfs_dump_index;
+ u32 *databuf = hisi_hba->debugfs_regs[dump_index][DEBUGFS_AXI].data;
const struct hisi_sas_hw *hw = hisi_hba->hw;
const struct hisi_sas_debugfs_reg *axi =
hw->debugfs_reg_array[DEBUGFS_AXI];
@@ -2768,7 +2773,8 @@ static void hisi_sas_debugfs_snapshot_axi_reg(struct hisi_hba *hisi_hba)
static void hisi_sas_debugfs_snapshot_ras_reg(struct hisi_hba *hisi_hba)
{
- u32 *databuf = hisi_hba->debugfs_regs[0][DEBUGFS_RAS].data;
+ int dump_index = hisi_hba->debugfs_dump_index;
+ u32 *databuf = hisi_hba->debugfs_regs[dump_index][DEBUGFS_RAS].data;
const struct hisi_sas_hw *hw = hisi_hba->hw;
const struct hisi_sas_debugfs_reg *ras =
hw->debugfs_reg_array[DEBUGFS_RAS];
@@ -2781,8 +2787,9 @@ static void hisi_sas_debugfs_snapshot_ras_reg(struct hisi_hba *hisi_hba)
static void hisi_sas_debugfs_snapshot_itct_reg(struct hisi_hba *hisi_hba)
{
- void *cachebuf = hisi_hba->debugfs_itct_cache[0].cache;
- void *databuf = hisi_hba->debugfs_itct[0].itct;
+ int dump_index = hisi_hba->debugfs_dump_index;
+ void *cachebuf = hisi_hba->debugfs_itct_cache[dump_index].cache;
+ void *databuf = hisi_hba->debugfs_itct[dump_index].itct;
struct hisi_sas_itct *itct;
int i;
@@ -2799,9 +2806,10 @@ static void hisi_sas_debugfs_snapshot_itct_reg(struct hisi_hba *hisi_hba)
static void hisi_sas_debugfs_snapshot_iost_reg(struct hisi_hba *hisi_hba)
{
+ int dump_index = hisi_hba->debugfs_dump_index;
int max_command_entries = HISI_SAS_MAX_COMMANDS;
- void *cachebuf = hisi_hba->debugfs_iost_cache[0].cache;
- void *databuf = hisi_hba->debugfs_iost[0].iost;
+ void *cachebuf = hisi_hba->debugfs_iost_cache[dump_index].cache;
+ void *databuf = hisi_hba->debugfs_iost[dump_index].iost;
struct hisi_sas_iost *iost;
int i;
@@ -3195,6 +3203,7 @@ static const struct file_operations hisi_sas_debugfs_itct_cache_fops = {
static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
{
u64 *debugfs_timestamp;
+ int dump_index = hisi_hba->debugfs_dump_index;
struct dentry *dump_dentry;
struct dentry *dentry;
char name[256];
@@ -3202,17 +3211,18 @@ static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
int c;
int d;
- debugfs_timestamp = &hisi_hba->debugfs_timestamp;
- /* Create dump dir inside device dir */
- dump_dentry = debugfs_create_dir("dump", hisi_hba->debugfs_dir);
- hisi_hba->debugfs_dump_dentry = dump_dentry;
+ snprintf(name, 256, "%d", dump_index);
+
+ dump_dentry = debugfs_create_dir(name, hisi_hba->debugfs_dump_dentry);
+
+ debugfs_timestamp = &hisi_hba->debugfs_timestamp[dump_index];
debugfs_create_u64("timestamp", 0400, dump_dentry,
debugfs_timestamp);
debugfs_create_file("global", 0400, dump_dentry,
- &hisi_hba->debugfs_regs[0][DEBUGFS_GLOBAL],
- &hisi_sas_debugfs_global_fops);
+ &hisi_hba->debugfs_regs[dump_index][DEBUGFS_GLOBAL],
+ &hisi_sas_debugfs_global_fops);
/* Create port dir and files */
dentry = debugfs_create_dir("port", dump_dentry);
@@ -3220,7 +3230,7 @@ static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
snprintf(name, 256, "%d", p);
debugfs_create_file(name, 0400, dentry,
- &hisi_hba->debugfs_port_reg[0][p],
+ &hisi_hba->debugfs_port_reg[dump_index][p],
&hisi_sas_debugfs_port_fops);
}
@@ -3230,7 +3240,7 @@ static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
snprintf(name, 256, "%d", c);
debugfs_create_file(name, 0400, dentry,
- &hisi_hba->debugfs_cq[0][c],
+ &hisi_hba->debugfs_cq[dump_index][c],
&hisi_sas_debugfs_cq_fops);
}
@@ -3240,32 +3250,32 @@ static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
snprintf(name, 256, "%d", d);
debugfs_create_file(name, 0400, dentry,
- &hisi_hba->debugfs_dq[0][d],
+ &hisi_hba->debugfs_dq[dump_index][d],
&hisi_sas_debugfs_dq_fops);
}
debugfs_create_file("iost", 0400, dump_dentry,
- &hisi_hba->debugfs_iost[0],
+ &hisi_hba->debugfs_iost[dump_index],
&hisi_sas_debugfs_iost_fops);
debugfs_create_file("iost_cache", 0400, dump_dentry,
- &hisi_hba->debugfs_iost_cache[0],
+ &hisi_hba->debugfs_iost_cache[dump_index],
&hisi_sas_debugfs_iost_cache_fops);
debugfs_create_file("itct", 0400, dump_dentry,
- &hisi_hba->debugfs_itct[0],
+ &hisi_hba->debugfs_itct[dump_index],
&hisi_sas_debugfs_itct_fops);
debugfs_create_file("itct_cache", 0400, dump_dentry,
- &hisi_hba->debugfs_itct_cache[0],
+ &hisi_hba->debugfs_itct_cache[dump_index],
&hisi_sas_debugfs_itct_cache_fops);
debugfs_create_file("axi", 0400, dump_dentry,
- &hisi_hba->debugfs_regs[0][DEBUGFS_AXI],
+ &hisi_hba->debugfs_regs[dump_index][DEBUGFS_AXI],
&hisi_sas_debugfs_axi_fops);
debugfs_create_file("ras", 0400, dump_dentry,
- &hisi_hba->debugfs_regs[0][DEBUGFS_RAS],
+ &hisi_hba->debugfs_regs[dump_index][DEBUGFS_RAS],
&hisi_sas_debugfs_ras_fops);
return;
@@ -3296,8 +3306,7 @@ static ssize_t hisi_sas_debugfs_trigger_dump_write(struct file *file,
struct hisi_hba *hisi_hba = file->f_inode->i_private;
char buf[8];
- /* A bit racy, but don't care too much since it's only debugfs */
- if (hisi_hba->debugfs_snapshot)
+ if (hisi_hba->debugfs_dump_index >= hisi_sas_debugfs_dump_count)
return -EFAULT;
if (count > 8)
@@ -3700,13 +3709,17 @@ void hisi_sas_debugfs_work_handler(struct work_struct *work)
struct hisi_hba *hisi_hba =
container_of(work, struct hisi_hba, debugfs_work);
u64 timestamp = local_clock() / NSEC_PER_MSEC;
+ struct device *dev = hisi_hba->dev;
+ int debugfs_dump_index = hisi_hba->debugfs_dump_index;
- hisi_hba->debugfs_timestamp = timestamp;
- if (hisi_hba->debugfs_snapshot)
+ hisi_hba->debugfs_timestamp[debugfs_dump_index] = timestamp;
+ if (debugfs_dump_index >= hisi_sas_debugfs_dump_count) {
+ dev_warn(dev, "dump count exceeded!\n");
return;
- hisi_hba->debugfs_snapshot = true;
+ }
hisi_sas_debugfs_snapshot_regs(hisi_hba);
+ hisi_hba->debugfs_dump_index++;
}
EXPORT_SYMBOL_GPL(hisi_sas_debugfs_work_handler);
--
2.17.1