[PATCH <i-g-t> v4 0/4] Add single engine busyness stats in GPUTOP

[Soham Purkait]

      Add single engine busyness support in GPUTOP.
This uses the PMU interface to display the busyness
of each engine instances. 
    This patch refactors GPUTOP to be vendor-agnostic, 
laying the groundwork for future support of multiple 
GPU vendors.
    Currently, GPUTOP supports GPUs with Xe driver only
and can monitor the engine busyness of multiple GPU
devices simultaneously through abstracting vendor 
specific code into a common interface and implementing 
vendor-neutral APIs for monitoring.

DRIVER: xe || BDF: 0000:00:02.0
ENGINES         BUSY
Render/3D/0   | 96.5% ███████████████████████████████████████ |
Blitter/0     | 91.6% █████████████████████████████████████   |
Video/0       | 56.2% ███████████████████████████             |
VideoEnhance/0| 97.7% ████████████████████████████████████████|
Compute/0     | 48.5% ███████████████████████                 |

Soham Purkait (4):
  lib/igt_device_scan: Enable finding all IGT devices for a specific
		       driver
  tools/gputop/utils: Add gputop utility functions common to all drivers
  tools/gputop/xe_gputop: Add gputop support for xe specific devices
  tools/gputop/gputop: Enable support for multiple GPUs and instances

 lib/igt_device_scan.c       |  58 ++++++
 lib/igt_device_scan.h       |   3 +
 tools/{ => gputop}/gputop.c | 211 ++++++++++++++++----
 tools/gputop/meson.build    |   6 +
 tools/gputop/utils.c        |  51 +++++
 tools/gputop/utils.h        |  55 ++++++
 tools/gputop/xe_gputop.c    | 372 ++++++++++++++++++++++++++++++++++++
 tools/gputop/xe_gputop.h    |  73 +++++++
 tools/meson.build           |   6 +-
 9 files changed, 789 insertions(+), 46 deletions(-)
 rename tools/{ => gputop}/gputop.c (69%)
 create mode 100644 tools/gputop/meson.build
 create mode 100644 tools/gputop/utils.c
 create mode 100644 tools/gputop/utils.h
 create mode 100644 tools/gputop/xe_gputop.c
 create mode 100644 tools/gputop/xe_gputop.h

-- 
2.34.1