Date: Wed, 02 Sep 2015 10:26:43 -0700 From: John Baldwin <jhb@freebsd.org> To: "Conrad E. Meyer" <cem@freebsd.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r287403 - head/sys/dev/ioat Message-ID: <3589074.YABE6tqvK0@ralph.baldwin.cx> In-Reply-To: <201509021648.t82Gm451015184@repo.freebsd.org> References: <201509021648.t82Gm451015184@repo.freebsd.org>
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On Wednesday, September 02, 2015 04:48:04 PM Conrad E. Meyer wrote: > Author: cem > Date: Wed Sep 2 16:48:03 2015 > New Revision: 287403 > URL: https://svnweb.freebsd.org/changeset/base/287403 > > Log: > ioat: re-initialize interrupts after resetting hw on BDXDE > > Resetting some generations of the I/OAT hardware (just BDXDE for now) > resets the corresponding MSI-X registers. So, teardown and > re-initialize interrupts after resetting the hardware. > > Reviewed by: jimharris > Approved by: markj (mentor) > Sponsored by: EMC / Isilon Storage Division > Differential Revision: https://reviews.freebsd.org/D3549 Alternatively you could use pci_restore_state() (before reset) and pci_save_state() (after reset) to restore standard PCI config registers (including MSI/MSI-X) after a reset. This might be more scalable if you want to ensure other PCI config registers (e.g. PCI-e capabilities) are restored after a reset. -- John Baldwin
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