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V" , Alexey Kardashevskiy Subject: [RFC PATCH v2 22/22] pci: Define pci_iomap_range_encrypted Date: Tue, 18 Feb 2025 22:10:09 +1100 Message-ID: <20250218111017.491719-23-aik@amd.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250218111017.491719-1-aik@amd.com> References: <20250218111017.491719-1-aik@amd.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF00000146:EE_|DS0PR12MB8342:EE_ X-MS-Office365-Filtering-Correlation-Id: f4253d17-2324-4b4c-e9bd-08dd500debcb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|1800799024|7416014|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700013)(376014)(1800799024)(7416014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Feb 2025 11:18:07.6503 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f4253d17-2324-4b4c-e9bd-08dd500debcb X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF00000146.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB8342 So far PCI BARs could not be mapped as encrypted so there was no need in API supporting encrypted mappings. TDISP is adding such support so add pci_iomap_range_encrypted() to allow PCI drivers do the encrypted mapping when needed. Signed-off-by: Alexey Kardashevskiy --- include/asm-generic/pci_iomap.h | 4 ++++ drivers/pci/iomap.c | 24 ++++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/include/asm-generic/pci_iomap.h b/include/asm-generic/pci_iomap.h index 8fbb0a55545d..d7b922c5ab86 100644 --- a/include/asm-generic/pci_iomap.h +++ b/include/asm-generic/pci_iomap.h @@ -15,6 +15,10 @@ extern void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long ma extern void __iomem *pci_iomap_range(struct pci_dev *dev, int bar, unsigned long offset, unsigned long maxlen); +extern void __iomem *pci_iomap_range_encrypted(struct pci_dev *dev, + int bar, + unsigned long offset, + unsigned long maxlen); extern void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar, unsigned long offset, unsigned long maxlen); diff --git a/drivers/pci/iomap.c b/drivers/pci/iomap.c index 9fb7cacc15cd..97bada477336 100644 --- a/drivers/pci/iomap.c +++ b/drivers/pci/iomap.c @@ -52,6 +52,30 @@ void __iomem *pci_iomap_range(struct pci_dev *dev, } EXPORT_SYMBOL(pci_iomap_range); +void __iomem *pci_iomap_range_encrypted(struct pci_dev *dev, + int bar, + unsigned long offset, + unsigned long maxlen) +{ + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); + unsigned long flags = pci_resource_flags(dev, bar); + + if (len <= offset || !start) + return NULL; + len -= offset; + start += offset; + if (maxlen && len > maxlen) + len = maxlen; + if (flags & IORESOURCE_IO) + return NULL; + if ((flags & IORESOURCE_MEM) && (flags & IORESOURCE_VALIDATED)) + return ioremap_encrypted(start, len); + /* What? */ + return NULL; +} +EXPORT_SYMBOL(pci_iomap_range_encrypted); + /** * pci_iomap_wc_range - create a virtual WC mapping cookie for a PCI BAR * @dev: PCI device that owns the BAR