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Message-ID: <20201112175358.2653-4-kishon@ti.com>
Date: Thu, 12 Nov 2020 23:23:55 +0530
From: Kishon Vijay Abraham I <kishon@...com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
Rob Herring <robh+dt@...nel.org>,
Kishon Vijay Abraham I <kishon@...com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Arnd Bergmann <arnd@...db.de>,
Tom Joseph <tjoseph@...ence.com>,
Jingoo Han <jingoohan1@...il.com>,
Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
Marek Vasut <marek.vasut+renesas@...il.com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
Shawn Lin <shawn.lin@...k-chips.com>,
Heiko Stuebner <heiko@...ech.de>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
<linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-renesas-soc@...r.kernel.org>,
<linux-rockchip@...ts.infradead.org>,
<linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH v2 3/6] PCI: endpoint: Add support to link a physical function to a virtual function
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@...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
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