[PATCH linux dev-5.15] fsi: Add trace events in initialization path
Paul Menzel
pmenzel at molgen.mpg.de
Wed Jan 26 03:38:39 AEDT 2022
Dear Eddie,
Am 25.01.22 um 17:11 schrieb Eddie James:
> Add definitions for trace events to show the scanning flow in order
> to debug recent scanning problems.
Maybe give an example how to trace one of the new trace events.
Kind regards,
Paul
> Signed-off-by: Eddie James <eajames at linux.ibm.com>
> ---
> drivers/fsi/fsi-core.c | 13 ++-
> drivers/fsi/fsi-master-aspeed.c | 2 +
> include/trace/events/fsi.h | 109 +++++++++++++++++++++++
> include/trace/events/fsi_master_aspeed.h | 12 +++
> 4 files changed, 133 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
> index 59ddc9fd5bca..78710087aa05 100644
> --- a/drivers/fsi/fsi-core.c
> +++ b/drivers/fsi/fsi-core.c
> @@ -24,9 +24,6 @@
>
> #include "fsi-master.h"
>
> -#define CREATE_TRACE_POINTS
> -#include <trace/events/fsi.h>
> -
> #define FSI_SLAVE_CONF_NEXT_MASK GENMASK(31, 31)
> #define FSI_SLAVE_CONF_SLOTS_MASK GENMASK(23, 16)
> #define FSI_SLAVE_CONF_SLOTS_SHIFT 16
> @@ -95,6 +92,9 @@ struct fsi_slave {
> u8 t_echo_delay;
> };
>
> +#define CREATE_TRACE_POINTS
> +#include <trace/events/fsi.h>
> +
> #define to_fsi_master(d) container_of(d, struct fsi_master, dev)
> #define to_fsi_slave(d) container_of(d, struct fsi_slave, dev)
>
> @@ -524,6 +524,8 @@ static int fsi_slave_scan(struct fsi_slave *slave)
> dev->addr = engine_addr;
> dev->size = slots * engine_page_size;
>
> + trace_fsi_dev_init(dev);
> +
> dev_dbg(&slave->dev,
> "engine[%i]: type %x, version %x, addr %x size %x\n",
> dev->unit, dev->engine_type, version,
> @@ -953,6 +955,7 @@ static int __fsi_get_new_minor(struct fsi_slave *slave, enum fsi_dev_type type,
> if (id >= 0) {
> *out_index = fsi_adjust_index(cid);
> *out_dev = fsi_base_dev + id;
> + trace_fsi_minor(cid, type, true, cid);
> return 0;
> }
> /* Other failure */
> @@ -966,6 +969,7 @@ static int __fsi_get_new_minor(struct fsi_slave *slave, enum fsi_dev_type type,
> return id;
> *out_index = fsi_adjust_index(id);
> *out_dev = fsi_base_dev + id;
> + trace_fsi_minor(cid, type, false, id);
> return 0;
> }
>
> @@ -1006,6 +1010,7 @@ static int fsi_slave_init(struct fsi_master *master, int link, uint8_t id)
>
> crc = crc4(0, cfam_id, 32);
> if (crc) {
> + trace_fsi_slave_invalid_cfam(master, link, cfam_id);
> dev_warn(&master->dev, "slave %02x:%02x invalid cfam id CRC!\n",
> link, id);
> return -EIO;
> @@ -1080,6 +1085,8 @@ static int fsi_slave_init(struct fsi_master *master, int link, uint8_t id)
> if (rc)
> goto err_free;
>
> + trace_fsi_slave_init(slave);
> +
> /* Create chardev for userspace access */
> cdev_init(&slave->cdev, &cfam_fops);
> rc = cdev_device_add(&slave->cdev, &slave->dev);
> diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c
> index 8606e55c1721..04fec1aab23c 100644
> --- a/drivers/fsi/fsi-master-aspeed.c
> +++ b/drivers/fsi/fsi-master-aspeed.c
> @@ -449,11 +449,13 @@ static ssize_t cfam_reset_store(struct device *dev, struct device_attribute *att
> {
> struct fsi_master_aspeed *aspeed = dev_get_drvdata(dev);
>
> + trace_fsi_master_aspeed_cfam_reset(true);
> mutex_lock(&aspeed->lock);
> gpiod_set_value(aspeed->cfam_reset_gpio, 1);
> usleep_range(900, 1000);
> gpiod_set_value(aspeed->cfam_reset_gpio, 0);
> mutex_unlock(&aspeed->lock);
> + trace_fsi_master_aspeed_cfam_reset(false);
>
> return count;
> }
> diff --git a/include/trace/events/fsi.h b/include/trace/events/fsi.h
> index 9832cb8e0eb0..251bc57a8b7f 100644
> --- a/include/trace/events/fsi.h
> +++ b/include/trace/events/fsi.h
> @@ -122,6 +122,115 @@ TRACE_EVENT(fsi_master_break,
> )
> );
>
> +TRACE_EVENT(fsi_slave_init,
> + TP_PROTO(const struct fsi_slave *slave),
> + TP_ARGS(slave),
> + TP_STRUCT__entry(
> + __field(int, master_idx)
> + __field(int, master_n_links)
> + __field(int, idx)
> + __field(int, link)
> + __field(int, chip_id)
> + __field(__u32, cfam_id)
> + __field(__u32, size)
> + ),
> + TP_fast_assign(
> + __entry->master_idx = slave->master->idx;
> + __entry->master_n_links = slave->master->n_links;
> + __entry->idx = slave->cdev_idx;
> + __entry->link = slave->link;
> + __entry->chip_id = slave->chip_id;
> + __entry->cfam_id = slave->cfam_id;
> + __entry->size = slave->size;
> + ),
> + TP_printk("fsi%d: idx:%d link:%d/%d cid:%d cfam:%08x %08x",
> + __entry->master_idx,
> + __entry->idx,
> + __entry->link,
> + __entry->master_n_links,
> + __entry->chip_id,
> + __entry->cfam_id,
> + __entry->size
> + )
> +);
> +
> +TRACE_EVENT(fsi_slave_invalid_cfam,
> + TP_PROTO(const struct fsi_master *master, int link, uint32_t cfam_id),
> + TP_ARGS(master, link, cfam_id),
> + TP_STRUCT__entry(
> + __field(int, master_idx)
> + __field(int, master_n_links)
> + __field(int, link)
> + __field(__u32, cfam_id)
> + ),
> + TP_fast_assign(
> + __entry->master_idx = master->idx;
> + __entry->master_n_links = master->n_links;
> + __entry->link = link;
> + __entry->cfam_id = cfam_id;
> + ),
> + TP_printk("fsi%d: cfam:%08x link:%d/%d",
> + __entry->master_idx,
> + __entry->cfam_id,
> + __entry->link,
> + __entry->master_n_links
> + )
> +);
> +
> +TRACE_EVENT(fsi_minor,
> + TP_PROTO(int cid, enum fsi_dev_type type, bool legacy, int result),
> + TP_ARGS(cid, type, legacy, result),
> + TP_STRUCT__entry(
> + __field(int, cid)
> + __field(int, type)
> + __field(bool, legacy)
> + __field(int, result)
> + ),
> + TP_fast_assign(
> + __entry->cid = cid;
> + __entry->type = type;
> + __entry->legacy = legacy;
> + __entry->result = result;
> + ),
> + TP_printk("%d: cid:%d type:%d%s",
> + __entry->result,
> + __entry->cid,
> + __entry->type,
> + __entry->legacy ? " legacy" : ""
> + )
> +);
> +
> +TRACE_EVENT(fsi_dev_init,
> + TP_PROTO(const struct fsi_device *dev),
> + TP_ARGS(dev),
> + TP_STRUCT__entry(
> + __field(int, master_idx)
> + __field(int, link)
> + __field(int, type)
> + __field(int, unit)
> + __field(int, version)
> + __field(__u32, addr)
> + __field(__u32, size)
> + ),
> + TP_fast_assign(
> + __entry->master_idx = dev->slave->master->idx;
> + __entry->link = dev->slave->link;
> + __entry->type = dev->engine_type;
> + __entry->unit = dev->unit;
> + __entry->version = dev->version;
> + __entry->addr = dev->addr;
> + __entry->size = dev->size;
> + ),
> + TP_printk("fsi%d: slv%d: t:%02x u:%02x v:%02x %08x@%08x",
> + __entry->master_idx,
> + __entry->link,
> + __entry->type,
> + __entry->unit,
> + __entry->version,
> + __entry->size,
> + __entry->addr
> + )
> +);
>
> #endif /* _TRACE_FSI_H */
>
> diff --git a/include/trace/events/fsi_master_aspeed.h b/include/trace/events/fsi_master_aspeed.h
> index a355ceacc33f..0fff873775f1 100644
> --- a/include/trace/events/fsi_master_aspeed.h
> +++ b/include/trace/events/fsi_master_aspeed.h
> @@ -72,6 +72,18 @@ TRACE_EVENT(fsi_master_aspeed_opb_error,
> )
> );
>
> +TRACE_EVENT(fsi_master_aspeed_cfam_reset,
> + TP_PROTO(bool start),
> + TP_ARGS(start),
> + TP_STRUCT__entry(
> + __field(bool, start)
> + ),
> + TP_fast_assign(
> + __entry->start = start;
> + ),
> + TP_printk("%s", __entry->start ? "start" : "end")
> +);
> +
> #endif
>
> #include <trace/define_trace.h>
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