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From: Chris Wilson <chris@chris-wilson.co.uk>
To: Zhi Wang <zhi.a.wang@intel.com>,
	intel-gfx@lists.freedesktop.org,
	intel-gvt-dev@lists.freedesktop.org
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>,
	Ben Widawsky <benjamin.widawsky@intel.com>
Subject: Re: [RFCv5 2/2] drm/i915: Introduce private PAT management
Date: Tue, 29 Aug 2017 13:18:07 +0100	[thread overview]
Message-ID: <150400908785.8572.5049124729358246195@mail.alporthouse.com> (raw)
In-Reply-To: <1503993651-25665-2-git-send-email-zhi.a.wang@intel.com>

Quoting Zhi Wang (2017-08-29 09:00:51)
> The private PAT management is to support PPAT entry manipulation. Two
> APIs are introduced for dynamically managing PPAT entries: intel_ppat_get
> and intel_ppat_put.
> 
> intel_ppat_get will search for an existing PPAT entry which perfectly
> matches the required PPAT value. If not, it will try to allocate or
> return a partially matched PPAT entry if there is any available PPAT
> indexes or not.
> 
> intel_ppat_put will put back the PPAT entry which comes from
> intel_ppat_get. If it's dynamically allocated, the reference count will
> be decreased. If the reference count turns into zero, the PPAT index is
> freed again.
> 
> Besides, another two callbacks are introduced to support the private PAT
> management framework. One is ppat->update(), which writes the PPAT
> configurations in ppat->entries into HW. Another one is ppat->match, which
> will return a score to show how two PPAT values match with each other.

Oh and since you are exporting an interface, I bet you would appreciate
it if we had some unittests in selftests/ ;)
-Chris
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  parent reply	other threads:[~2017-08-29 12:18 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-29  8:00 [RFCv5 1/2] drm/i915: Factor out setup_private_pat() Zhi Wang
2017-08-29  8:00 ` [RFCv5 2/2] drm/i915: Introduce private PAT management Zhi Wang
2017-08-29  9:37   ` Joonas Lahtinen
2017-08-29 11:18     ` Wang, Zhi A
2017-08-29 17:54     ` Wang, Zhi A
2017-08-29 18:14       ` Chris Wilson
2017-08-29 18:19         ` Wang, Zhi A
2017-08-30 11:09           ` Joonas Lahtinen
2017-08-29 10:05   ` Chris Wilson
2017-08-29 10:39     ` Chris Wilson
2017-08-29 11:13       ` Wang, Zhi A
2017-08-29 11:23         ` Chris Wilson
2017-08-29 11:31           ` Wang, Zhi A
2017-08-29 11:38           ` Joonas Lahtinen
2017-08-29 12:12   ` Chris Wilson
2017-08-29 12:18   ` Chris Wilson [this message]
2017-08-29 12:41     ` Wang, Zhi A
2017-08-29  8:19 ` ✓ Fi.CI.BAT: success for series starting with [RFCv5,1/2] drm/i915: Factor out setup_private_pat() Patchwork
2017-08-29  9:39 ` ✗ Fi.CI.IGT: failure " Patchwork

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