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Subject[PATCH v2 10/11] fsi: aspeed: Add trace points
Date
These trace points help with debugging the FSI master. They show the low
level reads, writes and error states of the master.

Signed-off-by: Joel Stanley <joel@jms.id.au>
---
v2: remove unnecessary semicolon
---
drivers/fsi/fsi-master-aspeed.c | 22 +++++++
include/trace/events/fsi_master_aspeed.h | 77 ++++++++++++++++++++++++
2 files changed, 99 insertions(+)
create mode 100644 include/trace/events/fsi_master_aspeed.h

diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c
index d1b83f035483..95e226ac78b9 100644
--- a/drivers/fsi/fsi-master-aspeed.c
+++ b/drivers/fsi/fsi-master-aspeed.c
@@ -77,6 +77,9 @@ static const u32 fsi_base = 0xa0000000;
#define XFER_HALFWORD (BIT(0))
#define XFER_BYTE (0)

+#define CREATE_TRACE_POINTS
+#include <trace/events/fsi_master_aspeed.h>
+
#define FSI_LINK_ENABLE_SETUP_TIME 10 /* in mS */

#define DEFAULT_DIVISOR 14
@@ -102,6 +105,8 @@ static int __opb_write(struct fsi_master_aspeed *aspeed, u32 addr,

status = readl(base + OPB0_STATUS);

+ trace_fsi_master_aspeed_opb_write(addr, val, transfer_size, status, reg);
+
/* Return error when poll timed out */
if (ret)
return ret;
@@ -149,6 +154,10 @@ static int __opb_read(struct fsi_master_aspeed *aspeed, uint32_t addr,

result = readl(base + OPB0_FSI_DATA_R);

+ trace_fsi_master_aspeed_opb_read(addr, transfer_size, result,
+ readl(base + OPB0_STATUS),
+ reg);
+
/* Return error when poll timed out */
if (ret)
return ret;
@@ -196,6 +205,19 @@ static int check_errors(struct fsi_master_aspeed *aspeed, int err)
{
int ret;

+ if (trace_fsi_master_aspeed_opb_error_enabled()) {
+ __be32 mresp0, mstap0, mesrb0;
+
+ opb_readl(aspeed, ctrl_base + FSI_MRESP0, &mresp0);
+ opb_readl(aspeed, ctrl_base + FSI_MSTAP0, &mstap0);
+ opb_readl(aspeed, ctrl_base + FSI_MESRB0, &mesrb0);
+
+ trace_fsi_master_aspeed_opb_error(
+ be32_to_cpu(mresp0),
+ be32_to_cpu(mstap0),
+ be32_to_cpu(mesrb0));
+ }
+
if (err == -EIO) {
/* Check MAEB (0x70) ? */

diff --git a/include/trace/events/fsi_master_aspeed.h b/include/trace/events/fsi_master_aspeed.h
new file mode 100644
index 000000000000..a355ceacc33f
--- /dev/null
+++ b/include/trace/events/fsi_master_aspeed.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM fsi_master_aspeed
+
+#if !defined(_TRACE_FSI_MASTER_ASPEED_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_FSI_MASTER_ASPEED_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(fsi_master_aspeed_opb_read,
+ TP_PROTO(uint32_t addr, size_t size, uint32_t result, uint32_t status, uint32_t irq_status),
+ TP_ARGS(addr, size, result, status, irq_status),
+ TP_STRUCT__entry(
+ __field(uint32_t, addr)
+ __field(size_t, size)
+ __field(uint32_t, result)
+ __field(uint32_t, status)
+ __field(uint32_t, irq_status)
+ ),
+ TP_fast_assign(
+ __entry->addr = addr;
+ __entry->size = size;
+ __entry->result = result;
+ __entry->status = status;
+ __entry->irq_status = irq_status;
+ ),
+ TP_printk("addr %08x size %zu: result %08x sts: %08x irq_sts: %08x",
+ __entry->addr, __entry->size, __entry->result,
+ __entry->status, __entry->irq_status
+ )
+);
+
+TRACE_EVENT(fsi_master_aspeed_opb_write,
+ TP_PROTO(uint32_t addr, uint32_t val, size_t size, uint32_t status, uint32_t irq_status),
+ TP_ARGS(addr, val, size, status, irq_status),
+ TP_STRUCT__entry(
+ __field(uint32_t, addr)
+ __field(uint32_t, val)
+ __field(size_t, size)
+ __field(uint32_t, status)
+ __field(uint32_t, irq_status)
+ ),
+ TP_fast_assign(
+ __entry->addr = addr;
+ __entry->val = val;
+ __entry->size = size;
+ __entry->status = status;
+ __entry->irq_status = irq_status;
+ ),
+ TP_printk("addr %08x val %08x size %zu status: %08x irq_sts: %08x",
+ __entry->addr, __entry->val, __entry->size,
+ __entry->status, __entry->irq_status
+ )
+ );
+
+TRACE_EVENT(fsi_master_aspeed_opb_error,
+ TP_PROTO(uint32_t mresp0, uint32_t mstap0, uint32_t mesrb0),
+ TP_ARGS(mresp0, mstap0, mesrb0),
+ TP_STRUCT__entry(
+ __field(uint32_t, mresp0)
+ __field(uint32_t, mstap0)
+ __field(uint32_t, mesrb0)
+ ),
+ TP_fast_assign(
+ __entry->mresp0 = mresp0;
+ __entry->mstap0 = mstap0;
+ __entry->mesrb0 = mesrb0;
+ ),
+ TP_printk("mresp0 %08x mstap0 %08x mesrb0 %08x",
+ __entry->mresp0, __entry->mstap0, __entry->mesrb0
+ )
+ );
+
+#endif
+
+#include <trace/define_trace.h>
--
2.24.0.rc1
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