From: Sebastian Ott <sebott@linux.ibm.com>
To: Bjorn Helgaas <helgaas@kernel.org>,
Christoph Hellwig <hch@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>,
linux-pci@vger.kernel.org, Paul Mackerras <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 2/3] PCI/IOV: provide flag to skip VF scanning
Date: Fri, 21 Dec 2018 15:14:19 +0100 [thread overview]
Message-ID: <20181221141420.22555-2-sebott@linux.ibm.com> (raw)
In-Reply-To: <20181220200750.GF183878@google.com>
Provide a flag to skip scanning for new VFs after SRIOV enablement.
This can be set by implementations for which the VFs are already
reported by other means.
Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
drivers/pci/iov.c | 6 ++++++
include/linux/pci.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 408db232a328..3aa115ed3a65 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -257,6 +257,9 @@ static int sriov_add_vfs(struct pci_dev *dev, u16 num_vfs)
unsigned int i;
int rc;
+ if (dev->no_vf_scan)
+ return 0;
+
for (i = 0; i < num_vfs; i++) {
rc = pci_iov_add_virtfn(dev, i);
if (rc)
@@ -385,6 +388,9 @@ static void sriov_del_vfs(struct pci_dev *dev)
struct pci_sriov *iov = dev->sriov;
int i;
+ if (dev->no_vf_scan)
+ return;
+
for (i = 0; i < iov->num_VFs; i++)
pci_iov_remove_virtfn(dev, i);
}
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 11c71c4ecf75..f9bc7651c406 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -405,6 +405,7 @@ struct pci_dev {
unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
unsigned int is_probed:1; /* Device probing in progress */
unsigned int link_active_reporting:1;/* Device capable of reporting link active */
+ unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
pci_dev_flags_t dev_flags;
atomic_t enable_cnt; /* pci_enable_device has been called */
--
2.13.4
next prev parent reply other threads:[~2018-12-21 14:18 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20180912123411.23229-1-sebott@linux.ibm.com>
2018-09-12 13:02 ` [PATCH 0/2] sriov enablement on s390 Bjorn Helgaas
2018-09-12 14:40 ` Benjamin Herrenschmidt
2018-09-13 12:41 ` Sebastian Ott
2018-09-13 12:41 ` [PATCH 1/2] pci: provide add_vfs/del_vfs callbacks Sebastian Ott
2018-09-13 12:41 ` [PATCH 2/2] s390/pci: handle function enumeration after sriov enablement Sebastian Ott
2018-10-10 12:55 ` [PATCH 0/2] sriov enablement on s390 Sebastian Ott
2018-10-10 16:26 ` Bjorn Helgaas
2018-12-05 13:45 ` Sebastian Ott
2018-12-12 21:54 ` Bjorn Helgaas
2018-12-13 17:54 ` [PATCH 1/2] PCI: provide pcibios_sriov_add_vfs Sebastian Ott
2018-12-14 13:12 ` Christoph Hellwig
2018-12-13 17:54 ` [PATCH 2/2] s390/pci: handle function enumeration after sriov enablement Sebastian Ott
2018-12-14 13:12 ` Christoph Hellwig
2018-12-14 13:18 ` Christoph Hellwig
2018-12-17 17:30 ` Sebastian Ott
2018-12-17 17:35 ` Christoph Hellwig
2018-12-18 10:16 ` [PATCH 1/2] PCI/IOV: provide flag to skip VF scanning Sebastian Ott
2018-12-19 7:52 ` Christoph Hellwig
2018-12-20 20:07 ` Bjorn Helgaas
2018-12-21 14:14 ` [PATCH 1/3] PCI/IOV: factor out sriov_add_vfs Sebastian Ott
2018-12-21 14:14 ` Sebastian Ott [this message]
2018-12-21 14:14 ` [PATCH 3/3] s390/pci: skip VF scanning Sebastian Ott
2018-12-21 14:19 ` [PATCH 1/2] PCI/IOV: provide flag to " Sebastian Ott
2019-01-02 1:14 ` Bjorn Helgaas
2018-12-18 10:16 ` [PATCH 2/2] s390/pci: " Sebastian Ott
2018-12-19 7:52 ` Christoph Hellwig
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181221141420.22555-2-sebott@linux.ibm.com \
--to=sebott@linux.ibm.com \
--cc=arnd@arndb.de \
--cc=hch@infradead.org \
--cc=helgaas@kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=paulus@samba.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).