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Message-ID: <20190919135220.30663-5-Jerome.Pouiller@silabs.com>
Date: Thu, 19 Sep 2019 13:52:31 +0000
From: Jerome Pouiller <Jerome.Pouiller@...abs.com>
To: "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Kalle Valo <kvalo@...eaurora.org>,
"David S . Miller" <davem@...emloft.net>,
David Le Goff <David.Legoff@...abs.com>,
Jerome Pouiller <Jerome.Pouiller@...abs.com>
Subject: [PATCH v2 04/20] staging: wfx: add tracepoints for I/O access
From: Jérôme Pouiller <jerome.pouiller@...abs.com>
Some tracepoints are useful for debugging.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
drivers/staging/wfx/Makefile | 6 +-
drivers/staging/wfx/debug.c | 10 +++
drivers/staging/wfx/hwio.c | 11 +++
drivers/staging/wfx/traces.h | 149 +++++++++++++++++++++++++++++++++++
4 files changed, 175 insertions(+), 1 deletion(-)
create mode 100644 drivers/staging/wfx/debug.c
create mode 100644 drivers/staging/wfx/traces.h
diff --git a/drivers/staging/wfx/Makefile b/drivers/staging/wfx/Makefile
index e860845186cf..330b7288ebb5 100644
--- a/drivers/staging/wfx/Makefile
+++ b/drivers/staging/wfx/Makefile
@@ -1,8 +1,12 @@
# SPDX-License-Identifier: GPL-2.0
+# Necessary for CREATE_TRACE_POINTS
+CFLAGS_debug.o = -I$(src)
+
wfx-y := \
hwio.o \
- main.o
+ main.o \
+ debug.o
wfx-$(CONFIG_SPI) += bus_spi.o
wfx-$(subst m,y,$(CONFIG_MMC)) += bus_sdio.o
diff --git a/drivers/staging/wfx/debug.c b/drivers/staging/wfx/debug.c
new file mode 100644
index 000000000000..bf44c944640d
--- /dev/null
+++ b/drivers/staging/wfx/debug.c
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Debugfs interface.
+ *
+ * Copyright (c) 2017-2019, Silicon Laboratories, Inc.
+ * Copyright (c) 2010, ST-Ericsson
+ */
+
+#define CREATE_TRACE_POINTS
+#include "traces.h"
diff --git a/drivers/staging/wfx/hwio.c b/drivers/staging/wfx/hwio.c
index fa626a49dd8a..0cf52aee10e7 100644
--- a/drivers/staging/wfx/hwio.c
+++ b/drivers/staging/wfx/hwio.c
@@ -12,6 +12,7 @@
#include "hwio.h"
#include "wfx.h"
#include "bus.h"
+#include "traces.h"
/*
* Internal helpers.
@@ -63,6 +64,7 @@ static int read32_locked(struct wfx_dev *wdev, int reg, u32 *val)
wdev->hwbus_ops->lock(wdev->hwbus_priv);
ret = read32(wdev, reg, val);
+ _trace_io_read32(reg, *val);
wdev->hwbus_ops->unlock(wdev->hwbus_priv);
return ret;
}
@@ -73,6 +75,7 @@ static int write32_locked(struct wfx_dev *wdev, int reg, u32 val)
wdev->hwbus_ops->lock(wdev->hwbus_priv);
ret = write32(wdev, reg, val);
+ _trace_io_write32(reg, val);
wdev->hwbus_ops->unlock(wdev->hwbus_priv);
return ret;
}
@@ -86,11 +89,13 @@ static int write32_bits_locked(struct wfx_dev *wdev, int reg, u32 mask, u32 val)
val &= mask;
wdev->hwbus_ops->lock(wdev->hwbus_priv);
ret = read32(wdev, reg, &val_r);
+ _trace_io_read32(reg, val_r);
if (ret < 0)
goto err;
val_w = (val_r & ~mask) | val;
if (val_w != val_r) {
ret = write32(wdev, reg, val_w);
+ _trace_io_write32(reg, val_w);
}
err:
wdev->hwbus_ops->unlock(wdev->hwbus_priv);
@@ -166,6 +171,7 @@ static int indirect_read_locked(struct wfx_dev *wdev, int reg, u32 addr, void *b
wdev->hwbus_ops->lock(wdev->hwbus_priv);
ret = indirect_read(wdev, reg, addr, buf, len);
+ _trace_io_ind_read(reg, addr, buf, len);
wdev->hwbus_ops->unlock(wdev->hwbus_priv);
return ret;
}
@@ -176,6 +182,7 @@ static int indirect_write_locked(struct wfx_dev *wdev, int reg, u32 addr, const
wdev->hwbus_ops->lock(wdev->hwbus_priv);
ret = indirect_write(wdev, reg, addr, buf, len);
+ _trace_io_ind_write(reg, addr, buf, len);
wdev->hwbus_ops->unlock(wdev->hwbus_priv);
return ret;
}
@@ -190,6 +197,7 @@ static int indirect_read32_locked(struct wfx_dev *wdev, int reg, u32 addr, u32 *
wdev->hwbus_ops->lock(wdev->hwbus_priv);
ret = indirect_read(wdev, reg, addr, tmp, sizeof(u32));
*val = cpu_to_le32(*tmp);
+ _trace_io_ind_read32(reg, addr, *val);
wdev->hwbus_ops->unlock(wdev->hwbus_priv);
kfree(tmp);
return ret;
@@ -205,6 +213,7 @@ static int indirect_write32_locked(struct wfx_dev *wdev, int reg, u32 addr, u32
*tmp = cpu_to_le32(val);
wdev->hwbus_ops->lock(wdev->hwbus_priv);
ret = indirect_write(wdev, reg, addr, tmp, sizeof(u32));
+ _trace_io_ind_write32(reg, addr, val);
wdev->hwbus_ops->unlock(wdev->hwbus_priv);
kfree(tmp);
return ret;
@@ -217,6 +226,7 @@ int wfx_data_read(struct wfx_dev *wdev, void *buf, size_t len)
WARN((long) buf & 3, "%s: unaligned buffer", __func__);
wdev->hwbus_ops->lock(wdev->hwbus_priv);
ret = wdev->hwbus_ops->copy_from_io(wdev->hwbus_priv, WFX_REG_IN_OUT_QUEUE, buf, len);
+ _trace_io_read(WFX_REG_IN_OUT_QUEUE, buf, len);
wdev->hwbus_ops->unlock(wdev->hwbus_priv);
if (ret)
dev_err(wdev->dev, "%s: bus communication error: %d\n", __func__, ret);
@@ -230,6 +240,7 @@ int wfx_data_write(struct wfx_dev *wdev, const void *buf, size_t len)
WARN((long) buf & 3, "%s: unaligned buffer", __func__);
wdev->hwbus_ops->lock(wdev->hwbus_priv);
ret = wdev->hwbus_ops->copy_to_io(wdev->hwbus_priv, WFX_REG_IN_OUT_QUEUE, buf, len);
+ _trace_io_write(WFX_REG_IN_OUT_QUEUE, buf, len);
wdev->hwbus_ops->unlock(wdev->hwbus_priv);
if (ret)
dev_err(wdev->dev, "%s: bus communication error: %d\n", __func__, ret);
diff --git a/drivers/staging/wfx/traces.h b/drivers/staging/wfx/traces.h
new file mode 100644
index 000000000000..34642f3451b5
--- /dev/null
+++ b/drivers/staging/wfx/traces.h
@@ -0,0 +1,149 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Tracepoints definitions.
+ *
+ * Copyright (c) 2018-2019, Silicon Laboratories, Inc.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM wfx
+
+#if !defined(_WFX_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _WFX_TRACE_H
+
+#include <linux/tracepoint.h>
+
+#include "bus.h"
+
+/* The hell below need some explanations. For each symbolic number, we need to
+ * define it with TRACE_DEFINE_ENUM() and in a list for __print_symbolic.
+ *
+ * 1. Define a new macro that call TRACE_DEFINE_ENUM():
+ *
+ * #define xxx_name(sym) TRACE_DEFINE_ENUM(sym);
+ *
+ * 2. Define list of all symbols:
+ *
+ * #define list_names \
+ * ... \
+ * xxx_name(XXX) \
+ * ...
+ *
+ * 3. Instanciate that list_names:
+ *
+ * list_names
+ *
+ * 4. Redefine xxx_name() as a entry of array for __print_symbolic()
+ *
+ * #undef xxx_name
+ * #define xxx_name(msg) { msg, #msg },
+ *
+ * 5. list_name can now nearlu be used with __print_symbolic() but,
+ * __print_symbolic() dislike last comma of list. So we define a new list
+ * with a dummy element:
+ *
+ * #define list_for_print_symbolic list_names { -1, NULL }
+ */
+
+#define wfx_reg_list_enum \
+ wfx_reg_name(WFX_REG_CONFIG, "CONFIG") \
+ wfx_reg_name(WFX_REG_CONTROL, "CONTROL") \
+ wfx_reg_name(WFX_REG_IN_OUT_QUEUE, "QUEUE") \
+ wfx_reg_name(WFX_REG_AHB_DPORT, "AHB") \
+ wfx_reg_name(WFX_REG_BASE_ADDR, "BASE_ADDR") \
+ wfx_reg_name(WFX_REG_SRAM_DPORT, "SRAM") \
+ wfx_reg_name(WFX_REG_SET_GEN_R_W, "SET_GEN_R_W") \
+ wfx_reg_name(WFX_REG_FRAME_OUT, "FRAME_OUT")
+
+#undef wfx_reg_name
+#define wfx_reg_name(sym, name) TRACE_DEFINE_ENUM(sym);
+wfx_reg_list_enum
+#undef wfx_reg_name
+#define wfx_reg_name(sym, name) { sym, name },
+#define wfx_reg_list wfx_reg_list_enum { -1, NULL }
+
+DECLARE_EVENT_CLASS(io_data,
+ TP_PROTO(int reg, int addr, const void *io_buf, size_t len),
+ TP_ARGS(reg, addr, io_buf, len),
+ TP_STRUCT__entry(
+ __field(int, reg)
+ __field(int, addr)
+ __field(int, msg_len)
+ __field(int, buf_len)
+ __array(u8, buf, 32)
+ __array(u8, addr_str, 10)
+ ),
+ TP_fast_assign(
+ __entry->reg = reg;
+ __entry->addr = addr;
+ __entry->msg_len = len;
+ __entry->buf_len = min_t(int, sizeof(__entry->buf), __entry->msg_len);
+ memcpy(__entry->buf, io_buf, __entry->buf_len);
+ if (addr >= 0)
+ snprintf(__entry->addr_str, 10, "/%08x", addr);
+ else
+ __entry->addr_str[0] = 0;
+ ),
+ TP_printk("%s%s: %s%s (%d bytes)",
+ __print_symbolic(__entry->reg, wfx_reg_list),
+ __entry->addr_str,
+ __print_hex(__entry->buf, __entry->buf_len),
+ __entry->msg_len > sizeof(__entry->buf) ? " ..." : "",
+ __entry->msg_len
+ )
+);
+DEFINE_EVENT(io_data, io_write,
+ TP_PROTO(int reg, int addr, const void *io_buf, size_t len),
+ TP_ARGS(reg, addr, io_buf, len));
+#define _trace_io_ind_write(reg, addr, io_buf, len) trace_io_write(reg, addr, io_buf, len)
+#define _trace_io_write(reg, io_buf, len) trace_io_write(reg, -1, io_buf, len)
+DEFINE_EVENT(io_data, io_read,
+ TP_PROTO(int reg, int addr, const void *io_buf, size_t len),
+ TP_ARGS(reg, addr, io_buf, len));
+#define _trace_io_ind_read(reg, addr, io_buf, len) trace_io_read(reg, addr, io_buf, len)
+#define _trace_io_read(reg, io_buf, len) trace_io_read(reg, -1, io_buf, len)
+
+DECLARE_EVENT_CLASS(io_data32,
+ TP_PROTO(int reg, int addr, u32 val),
+ TP_ARGS(reg, addr, val),
+ TP_STRUCT__entry(
+ __field(int, reg)
+ __field(int, addr)
+ __field(int, val)
+ __array(u8, addr_str, 10)
+ ),
+ TP_fast_assign(
+ __entry->reg = reg;
+ __entry->addr = addr;
+ __entry->val = val;
+ if (addr >= 0)
+ snprintf(__entry->addr_str, 10, "/%08x", addr);
+ else
+ __entry->addr_str[0] = 0;
+ ),
+ TP_printk("%s%s: %08x",
+ __print_symbolic(__entry->reg, wfx_reg_list),
+ __entry->addr_str,
+ __entry->val
+ )
+);
+DEFINE_EVENT(io_data32, io_write32,
+ TP_PROTO(int reg, int addr, u32 val),
+ TP_ARGS(reg, addr, val));
+#define _trace_io_ind_write32(reg, addr, val) trace_io_write32(reg, addr, val)
+#define _trace_io_write32(reg, val) trace_io_write32(reg, -1, val)
+DEFINE_EVENT(io_data32, io_read32,
+ TP_PROTO(int reg, int addr, u32 val),
+ TP_ARGS(reg, addr, val));
+#define _trace_io_ind_read32(reg, addr, val) trace_io_read32(reg, addr, val)
+#define _trace_io_read32(reg, val) trace_io_read32(reg, -1, val)
+
+#endif
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE traces
+
+#include <trace/define_trace.h>
--
2.20.1
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