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Wed, 10 Mar 2021 10:10:20 -0600 Received: from DFLE110.ent.ti.com (10.64.6.31) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 10 Mar 2021 10:10:19 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Wed, 10 Mar 2021 10:10:19 -0600 Received: from a0393678-ssd.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 12AG9qku100440; Wed, 10 Mar 2021 10:10:13 -0600 From: Kishon Vijay Abraham I To: Kishon Vijay Abraham I , Lorenzo Pieralisi , Bjorn Helgaas , Jonathan Corbet , Rob Herring , Arnd Bergmann , Tom Joseph , Jingoo Han , Gustavo Pimentel , Marek Vasut , Yoshihiro Shimoda , Shawn Lin , Heiko Stuebner , Nadeem Athani CC: Greg Kroah-Hartman , , , , , , , , Lokesh Vutla Subject: [PATCH v4 3/7] PCI: endpoint: Add support to link a physical function to a virtual function Date: Wed, 10 Mar 2021 21:39:39 +0530 Message-ID: <20210310160943.7606-4-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210310160943.7606-1-kishon@ti.com> References: <20210310160943.7606-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210310_161032_480632_5AB1BDBA X-CRM114-Status: GOOD ( 12.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 --- 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, };