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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Bjorn Helgaas , Jaroslav Kysela , Takashi Iwai Cc: Han Gao , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, netdev@vger.kernel.org, linux-pci@vger.kernel.org, linux-sound@vger.kernel.org References: <20251224-pci-msi-addr-mask-v1-0-05a6fcb4b4c0@iscas.ac.cn> <20251224-pci-msi-addr-mask-v1-5-05a6fcb4b4c0@iscas.ac.cn> Content-Language: en-US From: "Creeley, Brett" In-Reply-To: <20251224-pci-msi-addr-mask-v1-5-05a6fcb4b4c0@iscas.ac.cn> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SJ0PR05CA0204.namprd05.prod.outlook.com (2603:10b6:a03:330::29) To SA3PR12MB7975.namprd12.prod.outlook.com (2603:10b6:806:320::11) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA3PR12MB7975:EE_|PH7PR12MB5926:EE_ X-MS-Office365-Filtering-Correlation-Id: f6a32090-a167-46fa-ac68-08de4d52ac0c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014|7416014|7053199007|921020; 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Use proper caution when opening attachments, clicking links, or responding. > > > The code was originally written using no_64bit_msi, which restricts the > device to 32-bit MSI addresses. > > Since msi_addr_mask is introduced, use DMA_BIT_MASK(IONIC_ADDR_LEN) > instead of DMA_BIT_MASK(32) here for msi_addr_mask, describing the > restriction more precisely and allowing these devices to work on > platforms with MSI doorbell address above 32-bit space, as long as it is > within the hardware's addressable space. > > Also remove #ifdef CONFIG_PPC64 wrapped around it, since this is a > hardware restriction and not a platform one. > > Signed-off-by: Vivian Wang > > --- > > RFC because net-next is closed > > pensando maintainers: I don't know if this is the actual restriction, > and do not have any Pensando device to test this. Please help with > checking this. Thanks. > --- > drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c > index 0671deae9a28..16133537c535 100644 > --- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c > +++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c > @@ -329,10 +329,8 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) > goto err_out; > } > > -#ifdef CONFIG_PPC64 > /* Ensure MSI/MSI-X interrupts lie within addressable physical memory */ > - pdev->msi_addr_mask = DMA_BIT_MASK(32); > -#endif > + pdev->msi_addr_mask = DMA_BIT_MASK(IONIC_ADDR_LEN); I'm not sure that our device has MSI address limitations. I am getting an answer to this locally, but we might only be limited in the DMA address space. I will get back on this as quickly as possible. Thanks, Brett > > err = ionic_setup_one(ionic); > if (err) > > -- > 2.51.2 >