[PATCH v4 1/9] media: hantro: Trace hevc hw cycles performance register
From: Benjamin Gaignard
Date: Fri Jun 25 2021 - 10:12:12 EST
After each hevc decoded frame trace the hardware performance.
It provides the number of hw cycles spend per decoded macroblock.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
---
version 4:
- Log file descriptor in trace point.
- Add documentation about how use the trace points in Hantro driver.
version 3:
- Change trace file name to hantro_trace.h
Documentation/admin-guide/media/hantro.rst | 14 +++++++
.../admin-guide/media/v4l-drivers.rst | 1 +
drivers/staging/media/hantro/hantro_drv.c | 3 ++
.../staging/media/hantro/hantro_g2_hevc_dec.c | 16 ++++++++
drivers/staging/media/hantro/hantro_g2_regs.h | 1 +
drivers/staging/media/hantro/hantro_hw.h | 1 +
drivers/staging/media/hantro/hantro_trace.h | 41 +++++++++++++++++++
drivers/staging/media/hantro/imx8m_vpu_hw.c | 1 +
8 files changed, 78 insertions(+)
create mode 100644 Documentation/admin-guide/media/hantro.rst
create mode 100644 drivers/staging/media/hantro/hantro_trace.h
diff --git a/Documentation/admin-guide/media/hantro.rst b/Documentation/admin-guide/media/hantro.rst
new file mode 100644
index 000000000000..6cb552a5dfcb
--- /dev/null
+++ b/Documentation/admin-guide/media/hantro.rst
@@ -0,0 +1,14 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=================
+The hantro driver
+=================
+
+Trace
+~~~~~
+
+You can trace the hardware decoding performances by using event tracing::
+
+ # echo hantro_hevc_perf >> /sys/kernel/debug/tracing/set_event
+
+That will keep a log of the number of hardware cycles spend per decoded macroblock
diff --git a/Documentation/admin-guide/media/v4l-drivers.rst b/Documentation/admin-guide/media/v4l-drivers.rst
index 9c7ebe2ca3bd..4f2f72a2b3b5 100644
--- a/Documentation/admin-guide/media/v4l-drivers.rst
+++ b/Documentation/admin-guide/media/v4l-drivers.rst
@@ -15,6 +15,7 @@ Video4Linux (V4L) driver-specific documentation
cx88
davinci-vpbe
fimc
+ hantro
imx
imx7
ipu3
diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
index 31d8449ca1d2..61c0e9f0a05e 100644
--- a/drivers/staging/media/hantro/hantro_drv.c
+++ b/drivers/staging/media/hantro/hantro_drv.c
@@ -28,6 +28,9 @@
#include "hantro.h"
#include "hantro_hw.h"
+#define CREATE_TRACE_POINTS
+#include "hantro_trace.h"
+
#define DRIVER_NAME "hantro-vpu"
int hantro_debug;
diff --git a/drivers/staging/media/hantro/hantro_g2_hevc_dec.c b/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
index 340efb57fd18..fef16d1724da 100644
--- a/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
+++ b/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
@@ -7,6 +7,7 @@
#include "hantro_hw.h"
#include "hantro_g2_regs.h"
+#include "hantro_trace.h"
#define HEVC_DEC_MODE 0xC
@@ -22,6 +23,21 @@ static inline void hantro_write_addr(struct hantro_dev *vpu,
vdpu_write(vpu, addr & 0xffffffff, offset);
}
+void hantro_g2_hevc_dec_done(struct hantro_ctx *ctx)
+{
+ const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
+ const struct v4l2_ctrl_hevc_sps *sps = ctrls->sps;
+ struct hantro_dev *vpu = ctx->dev;
+ u32 hw_cycles = 0;
+ u32 mbs = (sps->pic_width_in_luma_samples *
+ sps->pic_height_in_luma_samples) >> 8;
+
+ if (mbs)
+ hw_cycles = vdpu_read(vpu, G2_HW_PERFORMANCE) / mbs;
+
+ trace_hantro_hevc_perf(ctx, hw_cycles);
+}
+
static void prepare_tile_info_buffer(struct hantro_ctx *ctx)
{
struct hantro_dev *vpu = ctx->dev;
diff --git a/drivers/staging/media/hantro/hantro_g2_regs.h b/drivers/staging/media/hantro/hantro_g2_regs.h
index bb22fa921914..17d84ec9c5c2 100644
--- a/drivers/staging/media/hantro/hantro_g2_regs.h
+++ b/drivers/staging/media/hantro/hantro_g2_regs.h
@@ -177,6 +177,7 @@
#define G2_REG_CONFIG_DEC_CLK_GATE_E BIT(16)
#define G2_REG_CONFIG_DEC_CLK_GATE_IDLE_E BIT(17)
+#define G2_HW_PERFORMANCE (G2_SWREG(63))
#define G2_ADDR_DST (G2_SWREG(65))
#define G2_REG_ADDR_REF(i) (G2_SWREG(67) + ((i) * 0x8))
#define G2_ADDR_DST_CHR (G2_SWREG(99))
diff --git a/drivers/staging/media/hantro/hantro_hw.h b/drivers/staging/media/hantro/hantro_hw.h
index 5dcf65805396..5a455dd28aa6 100644
--- a/drivers/staging/media/hantro/hantro_hw.h
+++ b/drivers/staging/media/hantro/hantro_hw.h
@@ -242,6 +242,7 @@ void hantro_h264_dec_exit(struct hantro_ctx *ctx);
int hantro_hevc_dec_init(struct hantro_ctx *ctx);
void hantro_hevc_dec_exit(struct hantro_ctx *ctx);
int hantro_g2_hevc_dec_run(struct hantro_ctx *ctx);
+void hantro_g2_hevc_dec_done(struct hantro_ctx *ctx);
int hantro_hevc_dec_prepare_run(struct hantro_ctx *ctx);
dma_addr_t hantro_hevc_get_ref_buf(struct hantro_ctx *ctx, int poc);
void hantro_hevc_ref_remove_unused(struct hantro_ctx *ctx);
diff --git a/drivers/staging/media/hantro/hantro_trace.h b/drivers/staging/media/hantro/hantro_trace.h
new file mode 100644
index 000000000000..fa8fec26fa3c
--- /dev/null
+++ b/drivers/staging/media/hantro/hantro_trace.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#if !defined(__HANTRO_TRACE_H__) || defined(TRACE_HEADER_MULTI_READ)
+#define __HANTRO_TRACE_H__
+
+#include <linux/tracepoint.h>
+#include <media/videobuf2-v4l2.h>
+
+#include "hantro.h"
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hantro
+#define TRACE_INCLUDE_FILE hantro_trace
+
+TRACE_EVENT(hantro_hevc_perf,
+ TP_PROTO(struct hantro_ctx *ctx, u32 hw_cycles),
+
+ TP_ARGS(ctx, hw_cycles),
+
+ TP_STRUCT__entry(
+ __field(int, minor)
+ __field(struct v4l2_fh *, fh)
+ __field(u32, hw_cycles)
+ ),
+
+ TP_fast_assign(
+ __entry->minor = ctx->fh.vdev->minor;
+ __entry->fh = &ctx->fh;
+ __entry->hw_cycles = hw_cycles;
+ ),
+
+ TP_printk("minor = %d, fh = %p, %8d cycles / mb",
+ __entry->minor, __entry->fh, __entry->hw_cycles)
+);
+
+#endif /* __HANTRO_TRACE_H__ */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH ../../drivers/staging/media/hantro
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/drivers/staging/media/hantro/imx8m_vpu_hw.c b/drivers/staging/media/hantro/imx8m_vpu_hw.c
index c3e616fd4e85..ab6ac620f0d0 100644
--- a/drivers/staging/media/hantro/imx8m_vpu_hw.c
+++ b/drivers/staging/media/hantro/imx8m_vpu_hw.c
@@ -253,6 +253,7 @@ static const struct hantro_codec_ops imx8mq_vpu_g2_codec_ops[] = {
.reset = imx8m_vpu_g2_reset,
.init = hantro_hevc_dec_init,
.exit = hantro_hevc_dec_exit,
+ .done = hantro_g2_hevc_dec_done,
},
};
--
2.25.1