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fpga: dfl: fme: add performance reporting support

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This patch adds support for performance reporting private feature
for FPGA Management Engine (FME). Now it supports several different
performance counters, including 'basic', 'cache', 'fabric', 'vtd'
and 'vtd_sip'. It allows user to use standard linux tools to access
these performance counters.

e.g. List all events by "perf list"

  perf list | grep fme

  dfl_fme0/cache_read_hit/                     [Kernel PMU event]
  dfl_fme0/cache_read_miss/                    [Kernel PMU event]
  ...

  dfl_fme0/fab_mmio_read/                      [Kernel PMU event]
  dfl_fme0/fab_mmio_write/                     [Kernel PMU event]
  ...

  dfl_fme0/fab_port_mmio_read,portid=?/        [Kernel PMU event]
  dfl_fme0/fab_port_mmio_write,portid=?/       [Kernel PMU event]
  ...

  dfl_fme0/vtd_port_devtlb_1g_fill,portid=?/   [Kernel PMU event]
  dfl_fme0/vtd_port_devtlb_2m_fill,portid=?/   [Kernel PMU event]
  ...

  dfl_fme0/vtd_sip_iotlb_1g_hit/               [Kernel PMU event]
  dfl_fme0/vtd_sip_iotlb_1g_miss/              [Kernel PMU event]
  ...

  dfl_fme0/clock                               [Kernel PMU event]
  ...

e.g. check increased counter value after run one application using
"perf stat" command.

 perf stat -e dfl_fme0/fab_mmio_read/,dfl_fme0/fab_mmio_write/ ./test

 Performance counter stats for './test':

                 1      dfl_fme0/fab_mmio_read/
                 2      dfl_fme0/fab_mmio_write/

       1.009496520 seconds time elapsed

Please note that fabric counters support both fab_* and fab_port_*, but
actually they are sharing one set of performance counters in hardware.
If user wants to monitor overall data events on fab_* then fab_port_*
can't be supported at the same time, see example below:

perf stat -e dfl_fme0/fab_mmio_read/,dfl_fme0/fab_port_mmio_write,portid=0/

 Performance counter stats for 'system wide':

                 0      dfl_fme0/fab_mmio_read/
   <not supported>      dfl_fme0/fab_port_mmio_write,portid=0/

       2.141064085 seconds time elapsed

Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
Link: https://lore.kernel.org/r/1587949583-12058-3-git-send-email-hao.wu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wu Hao 2020-04-27 09:06:23 +08:00 committed by Greg Kroah-Hartman
parent 1f03ac9460
commit 724142f8c4
7 changed files with 1134 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

104
Documentation/ABI/testing/sysfs-bus-event_source-devices-dfl_fme Normal file
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@ -0,0 +1,104 @@
What: /sys/bus/event_source/devices/dfl_fmeX/format
Date: April 2020
KernelVersion: 5.8
Contact: Wu Hao <hao.wu@intel.com>
Description: Read-only. Attribute group to describe the magic bits
that go into perf_event_attr.config for a particular pmu.
(See ABI/testing/sysfs-bus-event_source-devices-format).
Each attribute under this group defines a bit range of the
perf_event_attr.config. All supported attributes are listed
below.
event = "config:0-11" - event ID
evtype = "config:12-15" - event type
portid = "config:16-23" - event source
For example,
fab_mmio_read = "event=0x06,evtype=0x02,portid=0xff"
It shows this fab_mmio_read is a fabric type (0x02) event with
0x06 local event id for overall monitoring (portid=0xff).
What: /sys/bus/event_source/devices/dfl_fmeX/cpumask
Date: April 2020
KernelVersion: 5.8
Contact: Wu Hao <hao.wu@intel.com>
Description: Read-only. This file always returns cpu which the PMU is bound
for access to all fme pmu performance monitoring events.
What: /sys/bus/event_source/devices/dfl_fmeX/events
Date: April 2020
KernelVersion: 5.8
Contact: Wu Hao <hao.wu@intel.com>
Description: Read-only. Attribute group to describe performance monitoring
events specific to fme. Each attribute in this group describes
a single performance monitoring event supported by this fme pmu.
The name of the file is the name of the event.
(See ABI/testing/sysfs-bus-event_source-devices-events).
All supported performance monitoring events are listed below.
Basic events (evtype=0x00)
clock = "event=0x00,evtype=0x00,portid=0xff"
Cache events (evtype=0x01)
cache_read_hit = "event=0x00,evtype=0x01,portid=0xff"
cache_read_miss = "event=0x01,evtype=0x01,portid=0xff"
cache_write_hit = "event=0x02,evtype=0x01,portid=0xff"
cache_write_miss = "event=0x03,evtype=0x01,portid=0xff"
cache_hold_request = "event=0x05,evtype=0x01,portid=0xff"
cache_data_write_port_contention =
"event=0x06,evtype=0x01,portid=0xff"
cache_tag_write_port_contention =
"event=0x07,evtype=0x01,portid=0xff"
cache_tx_req_stall = "event=0x08,evtype=0x01,portid=0xff"
cache_rx_req_stall = "event=0x09,evtype=0x01,portid=0xff"
cache_eviction = "event=0x0a,evtype=0x01,portid=0xff"
Fabric events (evtype=0x02)
fab_pcie0_read = "event=0x00,evtype=0x02,portid=0xff"
fab_pcie0_write = "event=0x01,evtype=0x02,portid=0xff"
fab_pcie1_read = "event=0x02,evtype=0x02,portid=0xff"
fab_pcie1_write = "event=0x03,evtype=0x02,portid=0xff"
fab_upi_read = "event=0x04,evtype=0x02,portid=0xff"
fab_upi_write = "event=0x05,evtype=0x02,portid=0xff"
fab_mmio_read = "event=0x06,evtype=0x02,portid=0xff"
fab_mmio_write = "event=0x07,evtype=0x02,portid=0xff"
fab_port_pcie0_read = "event=0x00,evtype=0x02,portid=?"
fab_port_pcie0_write = "event=0x01,evtype=0x02,portid=?"
fab_port_pcie1_read = "event=0x02,evtype=0x02,portid=?"
fab_port_pcie1_write = "event=0x03,evtype=0x02,portid=?"
fab_port_upi_read = "event=0x04,evtype=0x02,portid=?"
fab_port_upi_write = "event=0x05,evtype=0x02,portid=?"
fab_port_mmio_read = "event=0x06,evtype=0x02,portid=?"
fab_port_mmio_write = "event=0x07,evtype=0x02,portid=?"
VTD events (evtype=0x03)
vtd_port_read_transaction = "event=0x00,evtype=0x03,portid=?"
vtd_port_write_transaction = "event=0x01,evtype=0x03,portid=?"
vtd_port_devtlb_read_hit = "event=0x02,evtype=0x03,portid=?"
vtd_port_devtlb_write_hit = "event=0x03,evtype=0x03,portid=?"
vtd_port_devtlb_4k_fill = "event=0x04,evtype=0x03,portid=?"
vtd_port_devtlb_2m_fill = "event=0x05,evtype=0x03,portid=?"
vtd_port_devtlb_1g_fill = "event=0x06,evtype=0x03,portid=?"
VTD SIP events (evtype=0x04)
vtd_sip_iotlb_4k_hit = "event=0x00,evtype=0x04,portid=0xff"
vtd_sip_iotlb_2m_hit = "event=0x01,evtype=0x04,portid=0xff"
vtd_sip_iotlb_1g_hit = "event=0x02,evtype=0x04,portid=0xff"
vtd_sip_slpwc_l3_hit = "event=0x03,evtype=0x04,portid=0xff"
vtd_sip_slpwc_l4_hit = "event=0x04,evtype=0x04,portid=0xff"
vtd_sip_rcc_hit = "event=0x05,evtype=0x04,portid=0xff"
vtd_sip_iotlb_4k_miss = "event=0x06,evtype=0x04,portid=0xff"
vtd_sip_iotlb_2m_miss = "event=0x07,evtype=0x04,portid=0xff"
vtd_sip_iotlb_1g_miss = "event=0x08,evtype=0x04,portid=0xff"
vtd_sip_slpwc_l3_miss = "event=0x09,evtype=0x04,portid=0xff"
vtd_sip_slpwc_l4_miss = "event=0x0a,evtype=0x04,portid=0xff"
vtd_sip_rcc_miss = "event=0x0b,evtype=0x04,portid=0xff"

2
drivers/fpga/Kconfig
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@ -156,7 +156,7 @@ config FPGA_DFL
config FPGA_DFL_FME
tristate "FPGA DFL FME Driver"
depends on FPGA_DFL && HWMON
depends on FPGA_DFL && HWMON && PERF_EVENTS
help
The FPGA Management Engine (FME) is a feature device implemented
under Device Feature List (DFL) framework. Select this option to

1
drivers/fpga/Makefile
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@ -40,6 +40,7 @@ obj-$(CONFIG_FPGA_DFL_FME_REGION) += dfl-fme-region.o
obj-$(CONFIG_FPGA_DFL_AFU) += dfl-afu.o
dfl-fme-objs := dfl-fme-main.o dfl-fme-pr.o dfl-fme-error.o
dfl-fme-objs += dfl-fme-perf.o
dfl-afu-objs := dfl-afu-main.o dfl-afu-region.o dfl-afu-dma-region.o
dfl-afu-objs += dfl-afu-error.o

4
drivers/fpga/dfl-fme-main.c
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@ -579,6 +579,10 @@ static struct dfl_feature_driver fme_feature_drvs[] = {
.id_table = fme_power_mgmt_id_table,
.ops = &fme_power_mgmt_ops,
},
{
.id_table = fme_perf_id_table,
.ops = &fme_perf_ops,
},
{
.ops = NULL,
},

1020
drivers/fpga/dfl-fme-perf.c Normal file
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File diff suppressed because it is too large Load Diff

2
drivers/fpga/dfl-fme.h
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@ -38,5 +38,7 @@ extern const struct dfl_feature_id fme_pr_mgmt_id_table[];
extern const struct dfl_feature_ops fme_global_err_ops;
extern const struct dfl_feature_id fme_global_err_id_table[];
extern const struct attribute_group fme_global_err_group;
extern const struct dfl_feature_ops fme_perf_ops;
extern const struct dfl_feature_id fme_perf_id_table[];
#endif /* __DFL_FME_H */

2
drivers/fpga/dfl.h
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@ -197,12 +197,14 @@ struct dfl_feature_driver {
* feature dev (platform device)'s reources.
* @ioaddr: mapped mmio resource address.
* @ops: ops of this sub feature.
* @priv: priv data of this feature.
*/
struct dfl_feature {
u64 id;
int resource_index;
void __iomem *ioaddr;
const struct dfl_feature_ops *ops;
void *priv;
};
#define DEV_STATUS_IN_USE 0