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Wysocki" , Danilo Krummrich , Manivannan Sadhasivam , =?utf-8?q?Krzysz?= =?utf-8?q?tof_Wilczy=C5=84ski?= , Kishon Vijay Abraham I , Bjorn Helgaas , Arnd Bergmann , Shuah Khan , Richard Zhu , Lucas Stach , Lorenzo Pieralisi , Rob Herring , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Krzysztof Kozlowski , Conor Dooley Cc: Niklas Cassel , dlemoal@kernel.org, jdmason@kudzu.us, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-kselftest@vger.kernel.org, imx@lists.linux.dev, devicetree@vger.kernel.org, Frank Li X-Mailer: b4 0.13-dev-e586c X-Developer-Signature: v=1; a=ed25519-sha256; t=1739301723; l=4330; i=Frank.Li@nxp.com; s=20240130; h=from:subject:message-id; bh=LQZt6j6fL/xsVdnnuehlbkvt1tbnzwcl6b8tL0dpbNI=; b=kKz0B5hQ9cPhdDQ8e3SwvyrKj3LKczhB/dPl9cwOrTxnxonfah6rHnV5me8NYO7xhU8kVCX8D TGSuzOkGOcWAvZQhANtXB/BdcxAhrSQwEs+0VvXBBeBtesgF6UR8jIS X-Developer-Key: i=Frank.Li@nxp.com; a=ed25519; pk=I0L1sDUfPxpAkRvPKy7MdauTuSENRq+DnA+G4qcS94Q= X-ClientProxiedBy: SJ0PR13CA0231.namprd13.prod.outlook.com (2603:10b6:a03:2c1::26) To PAXPR04MB9642.eurprd04.prod.outlook.com (2603:10a6:102:240::14) Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAXPR04MB9642:EE_|VI0PR04MB10291:EE_ X-MS-Office365-Filtering-Correlation-Id: e280fc38-1e3c-4bad-9f5f-08dd4ad1864a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Signed-off-by: Frank Li --- Change form v14 to v15 - change out address type to dma_addr_t to fix below build issue | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202502082311.G1hWGggF-lkp@intel.com/ All errors (new ones prefixed by >>): drivers/pci/endpoint/functions/pci-epf-test.c: In function 'pci_epf_test_enable_doorbell': >> drivers/pci/endpoint/functions/pci-epf-test.c:726:42: error: passing argument 4 of 'pci_epf_align_inbound_addr' from incompatible pointer type [-Werror=incompatible-pointer-types] 726 | &epf_test->db_bar.phys_addr, &offset); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | dma_addr_t * {aka unsigned int *} In file included from include/linux/pci-epc.h:12, Change form v9 to v14 - none change from v8 to v9 - pci_epf_align_inbound_addr(), base and off must be not NULL - rm pci_epf_align_inbound_addr_lo_hi() change from v7 to v8 - change name to pci_epf_align_inbound_addr() - update comment said only need for memory, which not allocated by pci_epf_alloc_space(). change from v6 to v7 - new patch --- drivers/pci/endpoint/pci-epf-core.c | 44 +++++++++++++++++++++++++++++++++++++ include/linux/pci-epf.h | 3 +++ 2 files changed, 47 insertions(+) diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c index f728ee2660a4e..b93984889f736 100644 --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -469,6 +469,50 @@ struct pci_epf *pci_epf_create(const char *name) } EXPORT_SYMBOL_GPL(pci_epf_create); +/** + * pci_epf_align_inbound_addr() - Get base address and offset that match BAR's + * alignment requirement + * @epf: the EPF device + * @addr: the address of the memory + * @bar: the BAR number corresponding to map addr + * @base: return base address, which match BAR's alignment requirement. + * @off: return offset. + * + * Helper function to convert input 'addr' to base and offset, which match + * BAR's alignment requirement. + * + * The pci_epf_alloc_space() function already accounts for alignment. This is + * primarily intended for use with other memory regions not allocated by + * pci_epf_alloc_space(), such as peripheral register spaces or the trigger + * address for a platform MSI controller. + */ +int pci_epf_align_inbound_addr(struct pci_epf *epf, enum pci_barno bar, + u64 addr, dma_addr_t *base, size_t *off) +{ + const struct pci_epc_features *epc_features; + u64 align; + + if (!base || !off) + return -EINVAL; + + epc_features = pci_epc_get_features(epf->epc, epf->func_no, epf->vfunc_no); + if (!epc_features) { + dev_err(&epf->dev, "epc_features not implemented\n"); + return -EOPNOTSUPP; + } + + align = epc_features->align; + align = align ? align : 128; + if (epc_features->bar[bar].type == BAR_FIXED) + align = max(epc_features->bar[bar].fixed_size, align); + + *base = round_down(addr, align); + *off = addr & (align - 1); + + return 0; +} +EXPORT_SYMBOL_GPL(pci_epf_align_inbound_addr); + static void pci_epf_dev_release(struct device *dev) { struct pci_epf *epf = to_pci_epf(dev); diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h index 518bc4171285e..a1a1bde1bc2ff 100644 --- a/include/linux/pci-epf.h +++ b/include/linux/pci-epf.h @@ -240,6 +240,9 @@ void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar, enum pci_epc_interface_type type); void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar, enum pci_epc_interface_type type); + +int pci_epf_align_inbound_addr(struct pci_epf *epf, enum pci_barno bar, + u64 addr, dma_addr_t *base, size_t *off); int pci_epf_bind(struct pci_epf *epf); void pci_epf_unbind(struct pci_epf *epf); int pci_epf_add_vepf(struct pci_epf *epf_pf, struct pci_epf *epf_vf);