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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: d39f4ae9-6a22-42a2-ab92-08db4a6e516b X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 May 2023 18:03:07.7676 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: yS1+2txv4s9ro/YY1L13Eft2Nw12bismg6GCZwUn1h1D33O5G7OKs9o7Ca0ru/Aa X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6457 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230501_110332_552431_FA7D9792 X-CRM114-Status: GOOD ( 13.35 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org This brings back the ops->detach_dev() code that commit 1b932ceddd19 ("iommu: Remove detach_dev callbacks") deleted and turns it into an IDENTITY domain. Also reverts commit 584d334b1393 ("iommu/ipmmu-vmsa: Remove ipmmu_utlb_disable()") Signed-off-by: Jason Gunthorpe --- drivers/iommu/ipmmu-vmsa.c | 43 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 9f64c5c9f5b90a..de958e411a92e0 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -298,6 +298,18 @@ static void ipmmu_utlb_enable(struct ipmmu_vmsa_domain *domain, mmu->utlb_ctx[utlb] = domain->context_id; } +/* + * Disable MMU translation for the microTLB. + */ +static void ipmmu_utlb_disable(struct ipmmu_vmsa_domain *domain, + unsigned int utlb) +{ + struct ipmmu_vmsa_device *mmu = domain->mmu; + + ipmmu_imuctr_write(mmu, utlb, 0); + mmu->utlb_ctx[utlb] = IPMMU_CTX_INVALID; +} + static void ipmmu_tlb_flush_all(void *cookie) { struct ipmmu_vmsa_domain *domain = cookie; @@ -630,6 +642,36 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain, return 0; } +static int ipmmu_iommu_identity_attach(struct iommu_domain *identity_domain, + struct device *dev) +{ + struct iommu_domain *io_domain = iommu_get_domain_for_dev(dev); + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + struct ipmmu_vmsa_domain *domain; + unsigned int i; + + if (io_domain == identity_domain || !io_domain) + return 0; + + domain = to_vmsa_domain(io_domain); + for (i = 0; i < fwspec->num_ids; ++i) + ipmmu_utlb_disable(domain, fwspec->ids[i]); + + /* + * TODO: Optimize by disabling the context when no device is attached. + */ + return 0; +} + +static struct iommu_domain_ops ipmmu_iommu_identity_ops = { + .attach_dev = ipmmu_iommu_identity_attach, +}; + +static struct iommu_domain ipmmu_iommu_identity_domain = { + .type = IOMMU_DOMAIN_IDENTITY, + .ops = &ipmmu_iommu_identity_ops, +}; + static int ipmmu_map(struct iommu_domain *io_domain, unsigned long iova, phys_addr_t paddr, size_t pgsize, size_t pgcount, int prot, gfp_t gfp, size_t *mapped) @@ -848,6 +890,7 @@ static struct iommu_group *ipmmu_find_group(struct device *dev) } static const struct iommu_ops ipmmu_ops = { + .identity_domain = &ipmmu_iommu_identity_domain, .domain_alloc = ipmmu_domain_alloc, .probe_device = ipmmu_probe_device, .release_device = ipmmu_release_device,