[PATCH i-g-t v3 0/4] Add single engine busyness stats in GPUTOP

[Soham Purkait <soham.purkait@intel.com>]

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 || SLOT: 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 xe driver
  tools/gputop/common_gputop: Add gputop functionality common to all drivers
  tools/gputop/xe_gputop: Add gputop support for xe specific devices
  tools/gputop: Enable support for multiple GPUs and instances

 lib/igt_device_scan.c        |  97 +++++++++
 lib/igt_device_scan.h        |   3 +
 tools/gputop/common_gputop.c |  79 +++++++
 tools/gputop/common_gputop.h |  58 +++++
 tools/{ => gputop}/gputop.c  | 203 ++++++++++++++----
 tools/gputop/meson.build     |   6 +
 tools/gputop/xe_gputop.c     | 404 +++++++++++++++++++++++++++++++++++
 tools/gputop/xe_gputop.h     |  74 +++++++
 tools/meson.build            |   6 +-
 9 files changed, 881 insertions(+), 49 deletions(-)
 create mode 100644 tools/gputop/common_gputop.c
 create mode 100644 tools/gputop/common_gputop.h
 rename tools/{ => gputop}/gputop.c (71%)
 create mode 100644 tools/gputop/meson.build
 create mode 100644 tools/gputop/xe_gputop.c
 create mode 100644 tools/gputop/xe_gputop.h

-- 
2.34.1