[Intel-gfx] [RFC 0/2] DGFX mmap with rpm

From: Anshuman Gupta <anshuman.gupta@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: chris@chris-wilson.co.uk, matthew.auld@intel.com, rodrigo.vivi@intel.com
Subject: [Intel-gfx] [RFC 0/2] DGFX mmap with rpm
Date: Wed, 17 Aug 2022 20:39:39 +0530	[thread overview]
Message-ID: <20220817150941.25447-1-anshuman.gupta@intel.com> (raw)

As per PCIe Spec Section 5.3.1.4.1
When pcie function is in d3hot state, 
Configuration and Message requests are the only TLPs accepted by a 
Function in the D3hot state. All other received Requests must be 
handled as Unsupported Requests, and all received Completions
may optionally be handled as Unexpected Completions.

Therefore when gfx endpoint function is in d3 state, all pcie iomem
transaction requires to transition the pcie function in D0 state.

RFC proposal to get community feedback to handle the lmem
mmap memory mappings with runtime suspend.

Anshuman Gupta (2):
  drm/i915/dgfx: Release mmap on rpm suspend
  drm/i915/dgfx: Runtime resume the dgpu on user fault

 drivers/gpu/drm/i915/gem/i915_gem_ttm.c  | 29 +++++++++++++++++++-----
 drivers/gpu/drm/i915/gt/intel_gt.c       |  1 +
 drivers/gpu/drm/i915/gt/intel_gt_types.h |  2 ++
 drivers/gpu/drm/i915/i915_gem.c          |  6 +++++
 4 files changed, 32 insertions(+), 6 deletions(-)

-- 
2.26.2