From: Bjorn Helgaas <helgaas@kernel.org>
To: Abhishek Sahu <abhsahu@nvidia.com>
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, lukas@wunner.de
Subject: Re: [PATCH v2 0/2] PCI: device link quirk for NVIDIA GPU
Date: Thu, 13 Jun 2019 15:57:20 -0500 [thread overview]
Message-ID: <20190613205720.GK13533@google.com> (raw)
In-Reply-To: <20190606092225.17960-1-abhsahu@nvidia.com>
On Thu, Jun 06, 2019 at 02:52:23PM +0530, Abhishek Sahu wrote:
> * v2:
>
> 1. Make the pci device link helper function generic which can be
> used for other multi-function PCI devices also.
> 2. Minor changes in comments and commit logs.
>
> * v1:
>
> NVIDIA Turing GPU [1] has hardware support for USB Type-C and
> VirtualLink [2]. The Turing GPU is a multi-function PCI device
> which has the following four functions:
>
> - VGA display controller (Function 0)
> - Audio controller (Function 1)
> - USB xHCI Host controller (Function 2)
> - USB Type-C USCI controller (Function 3)
>
> Currently NVIDIA and Nouveau GPU drivers only manage function 0.
> Rest of the functions are managed by other drivers. These functions
> internally in the hardware are tightly coupled. When function 0 goes
> in runtime suspended state, then it will do power gating for most of
> the hardware blocks. Some of these hardware blocks are used by
> the other PCI functions, which leads to functional failure. In the
> mainline kernel, the device link is present between
> function 0 and function 1. This patch series deals with creating
> a similar kind of device link between function 0 and
> functions 2 and 3.
>
> [1] https://www.nvidia.com/content/dam/en-zz/Solutions/design-visualization/technologies/turing-architecture/NVIDIA-Turing-Architecture-Whitepaper.pdf
> [2] https://en.wikipedia.org/wiki/VirtualLink
>
> Abhishek Sahu (2):
> PCI: Code reorganization for creating device link
> PCI: Create device link for NVIDIA GPU
Applied to pci/misc for v5.3, thanks!
next prev parent reply other threads:[~2019-06-13 20:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-06 9:22 [PATCH v2 0/2] PCI: device link quirk for NVIDIA GPU Abhishek Sahu
2019-06-06 9:22 ` [PATCH v2 1/2] PCI: Code reorganization for creating device link Abhishek Sahu
2019-06-06 9:22 ` [PATCH v2 2/2] PCI: Create device link for NVIDIA GPU Abhishek Sahu
2019-06-13 20:57 ` Bjorn Helgaas [this message]
2019-06-17 11:34 ` [PATCH v2 0/2] PCI: device link quirk " Abhishek Sahu
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