LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Kishon Vijay Abraham I <kishon@ti.com>
To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Rob Herring <robh+dt@kernel.org>,
	Tom Joseph <tjoseph@cadence.com>,
	Jingoo Han <jingoohan1@gmail.com>,
	Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
	Marek Vasut <marek.vasut+renesas@gmail.com>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
	Shawn Lin <shawn.lin@rock-chips.com>,
	Heiko Stuebner <heiko@sntech.de>
Cc: Jonathan Corbet <corbet@lwn.net>, Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	<linux-pci@vger.kernel.org>, <linux-doc@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-renesas-soc@vger.kernel.org>,
	<linux-rockchip@lists.infradead.org>,
	<linux-arm-kernel@lists.infradead.org>,
	Lokesh Vutla <lokeshvutla@ti.com>, <kishon@ti.com>
Subject: [PATCH v8 3/8] PCI: endpoint: Add support to link a physical function to a virtual function
Date: Wed, 11 Aug 2021 12:16:51 +0530	[thread overview]
Message-ID: <20210811064656.15399-4-kishon@ti.com> (raw)
In-Reply-To: <20210811064656.15399-1-kishon@ti.com>

While the physical function has to be linked to endpoint controller, the
virtual function has to be linked to a physical function. Add support to
link a physical function to a virtual function in pci-ep-cfs.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 drivers/pci/endpoint/pci-ep-cfs.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/pci/endpoint/pci-ep-cfs.c b/drivers/pci/endpoint/pci-ep-cfs.c
index f3a8b833b479..999911801877 100644
--- a/drivers/pci/endpoint/pci-ep-cfs.c
+++ b/drivers/pci/endpoint/pci-ep-cfs.c
@@ -475,6 +475,28 @@ static struct configfs_attribute *pci_epf_attrs[] = {
 	NULL,
 };
 
+static int pci_epf_vepf_link(struct config_item *epf_pf_item,
+			     struct config_item *epf_vf_item)
+{
+	struct pci_epf_group *epf_vf_group = to_pci_epf_group(epf_vf_item);
+	struct pci_epf_group *epf_pf_group = to_pci_epf_group(epf_pf_item);
+	struct pci_epf *epf_pf = epf_pf_group->epf;
+	struct pci_epf *epf_vf = epf_vf_group->epf;
+
+	return pci_epf_add_vepf(epf_pf, epf_vf);
+}
+
+static void pci_epf_vepf_unlink(struct config_item *epf_pf_item,
+				struct config_item *epf_vf_item)
+{
+	struct pci_epf_group *epf_vf_group = to_pci_epf_group(epf_vf_item);
+	struct pci_epf_group *epf_pf_group = to_pci_epf_group(epf_pf_item);
+	struct pci_epf *epf_pf = epf_pf_group->epf;
+	struct pci_epf *epf_vf = epf_vf_group->epf;
+
+	pci_epf_remove_vepf(epf_pf, epf_vf);
+}
+
 static void pci_epf_release(struct config_item *item)
 {
 	struct pci_epf_group *epf_group = to_pci_epf_group(item);
@@ -487,6 +509,8 @@ static void pci_epf_release(struct config_item *item)
 }
 
 static struct configfs_item_operations pci_epf_ops = {
+	.allow_link		= pci_epf_vepf_link,
+	.drop_link		= pci_epf_vepf_unlink,
 	.release		= pci_epf_release,
 };
 
-- 
2.17.1


  parent reply	other threads:[~2021-08-11  6:47 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-11  6:46 [PATCH v8 0/8] Add SR-IOV support in PCIe Endpoint Core Kishon Vijay Abraham I
2021-08-11  6:46 ` [PATCH v8 1/8] dt-bindings: PCI: pci-ep: Add binding to specify virtual function Kishon Vijay Abraham I
2021-08-11  6:46 ` [PATCH v8 2/8] PCI: endpoint: Add support to add virtual function in endpoint core Kishon Vijay Abraham I
2021-08-11  6:46 ` Kishon Vijay Abraham I [this message]
2021-08-11  6:46 ` [PATCH v8 4/8] PCI: endpoint: Add virtual function number in pci_epc ops Kishon Vijay Abraham I
2021-08-11  6:46 ` [PATCH v8 5/8] PCI: cadence: Simplify code to get register base address for configuring BAR Kishon Vijay Abraham I
2021-08-17 15:24   ` Bjorn Helgaas
2021-08-11  6:46 ` [PATCH v8 6/8] PCI: cadence: Add support to configure virtual functions Kishon Vijay Abraham I
2021-08-17 15:38   ` Bjorn Helgaas
2021-08-18 13:55     ` Kishon Vijay Abraham I
2021-08-11  6:46 ` [PATCH v8 7/8] misc: pci_endpoint_test: Populate sriov_configure ops to configure SR-IOV device Kishon Vijay Abraham I
2021-08-11  6:46 ` [PATCH v8 8/8] Documentation: PCI: endpoint/pci-endpoint-cfs: Guide to use SR-IOV Kishon Vijay Abraham I
2021-08-16 17:01 ` [PATCH v8 0/8] Add SR-IOV support in PCIe Endpoint Core Lorenzo Pieralisi

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=20210811064656.15399-4-kishon@ti.com \
    --to=kishon@ti.com \
    --cc=arnd@arndb.de \
    --cc=bhelgaas@google.com \
    --cc=corbet@lwn.net \
    --cc=devicetree@vger.kernel.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=gustavo.pimentel@synopsys.com \
    --cc=heiko@sntech.de \
    --cc=jingoohan1@gmail.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=linux-renesas-soc@vger.kernel.org \
    --cc=linux-rockchip@lists.infradead.org \
    --cc=lokeshvutla@ti.com \
    --cc=lorenzo.pieralisi@arm.com \
    --cc=marek.vasut+renesas@gmail.com \
    --cc=robh+dt@kernel.org \
    --cc=shawn.lin@rock-chips.com \
    --cc=tjoseph@cadence.com \
    --cc=yoshihiro.shimoda.uh@renesas.com \
    --subject='Re: [PATCH v8 3/8] PCI: endpoint: Add support to link a physical function to a virtual function' \
    /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

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).