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Tsirkin" To: qemu-devel@nongnu.org Cc: Peter Maydell , Jonathan Cameron , Alex =?utf-8?q?Benn=C3=A9e?= , Marcel Apfelbaum Subject: [PULL v2 32/86] pci/pcie_port: Add pci_find_port_by_pn() Message-ID: <20220516204913.542894-33-mst@redhat.com> References: <20220516204913.542894-1-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220516204913.542894-1-mst@redhat.com> X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Received-SPF: pass client-ip=170.10.129.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Jonathan Cameron Simple function to search a PCIBus to find a port by it's port number. CXL interleave decoding uses the port number as a target so it is necessary to locate the port when doing interleave decoding. Signed-off-by: Jonathan Cameron Reviewed-by: Alex Bennée Message-Id: <20220429144110.25167-31-Jonathan.Cameron@huawei.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/hw/pci/pcie_port.h | 2 ++ hw/pci/pcie_port.c | 25 +++++++++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/include/hw/pci/pcie_port.h b/include/hw/pci/pcie_port.h index e25b289ce8..7b8193061a 100644 --- a/include/hw/pci/pcie_port.h +++ b/include/hw/pci/pcie_port.h @@ -39,6 +39,8 @@ struct PCIEPort { void pcie_port_init_reg(PCIDevice *d); +PCIDevice *pcie_find_port_by_pn(PCIBus *bus, uint8_t pn); + #define TYPE_PCIE_SLOT "pcie-slot" OBJECT_DECLARE_SIMPLE_TYPE(PCIESlot, PCIE_SLOT) diff --git a/hw/pci/pcie_port.c b/hw/pci/pcie_port.c index e95c1e5519..687e4e763a 100644 --- a/hw/pci/pcie_port.c +++ b/hw/pci/pcie_port.c @@ -136,6 +136,31 @@ static void pcie_port_class_init(ObjectClass *oc, void *data) device_class_set_props(dc, pcie_port_props); } +PCIDevice *pcie_find_port_by_pn(PCIBus *bus, uint8_t pn) +{ + int devfn; + + for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { + PCIDevice *d = bus->devices[devfn]; + PCIEPort *port; + + if (!d || !pci_is_express(d) || !d->exp.exp_cap) { + continue; + } + + if (!object_dynamic_cast(OBJECT(d), TYPE_PCIE_PORT)) { + continue; + } + + port = PCIE_PORT(d); + if (port->port == pn) { + return d; + } + } + + return NULL; +} + static const TypeInfo pcie_port_type_info = { .name = TYPE_PCIE_PORT, .parent = TYPE_PCI_BRIDGE,