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DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Apr 2022 11:37:47.0191 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5cd59682-4538-4531-6b02-08da26b00544 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: BN8NAM11FT025.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4848 Cc: Vasant Hegde X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Vasant Hegde via iommu Reply-To: Vasant Hegde Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" With multiple pci segment support, number of BDF supported by each segment may differ. Hence introduce per segment device table size which depends on last_bdf. This will replace global "device_table_size" variable. Co-developed-by: Suravee Suthikulpanit Signed-off-by: Suravee Suthikulpanit Signed-off-by: Vasant Hegde --- drivers/iommu/amd/amd_iommu_types.h | 3 +++ drivers/iommu/amd/init.c | 18 ++++++++++-------- 2 files changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h index e39e7db54e69..aa666d0723ba 100644 --- a/drivers/iommu/amd/amd_iommu_types.h +++ b/drivers/iommu/amd/amd_iommu_types.h @@ -547,6 +547,9 @@ struct amd_iommu_pci_seg { /* Largest PCI device id we expect translation requests for */ u16 last_bdf; + /* Size of the device table */ + u32 dev_table_size; + /* * device table virtual address * diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index 71f39551a83a..f8da686182b5 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -414,6 +414,7 @@ static void iommu_set_cwwb_range(struct amd_iommu *iommu) static void iommu_set_device_table(struct amd_iommu *iommu) { u64 entry; + u32 dev_table_size = iommu->pci_seg->dev_table_size; BUG_ON(iommu->mmio_base == NULL); @@ -651,7 +652,7 @@ static int __init find_last_devid_acpi(struct acpi_table_header *table, u16 pci_ static inline int __init alloc_dev_table(struct amd_iommu_pci_seg *pci_seg) { pci_seg->dev_table = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO | GFP_DMA32, - get_order(dev_table_size)); + get_order(pci_seg->dev_table_size)); if (!pci_seg->dev_table) return -ENOMEM; @@ -661,7 +662,7 @@ static inline int __init alloc_dev_table(struct amd_iommu_pci_seg *pci_seg) static inline void free_dev_table(struct amd_iommu_pci_seg *pci_seg) { free_pages((unsigned long)pci_seg->dev_table, - get_order(dev_table_size)); + get_order(pci_seg->dev_table_size)); pci_seg->dev_table = NULL; } @@ -1034,7 +1035,7 @@ static bool __copy_device_table(struct amd_iommu *iommu) entry = (((u64) hi) << 32) + lo; old_devtb_size = ((entry & ~PAGE_MASK) + 1) << 12; - if (old_devtb_size != dev_table_size) { + if (old_devtb_size != pci_seg->dev_table_size) { pr_err("The device table size of IOMMU:%d is not expected!\n", iommu->index); return false; @@ -1053,15 +1054,15 @@ static bool __copy_device_table(struct amd_iommu *iommu) } old_devtb = (cc_platform_has(CC_ATTR_HOST_MEM_ENCRYPT) && is_kdump_kernel()) ? (__force void *)ioremap_encrypted(old_devtb_phys, - dev_table_size) - : memremap(old_devtb_phys, dev_table_size, MEMREMAP_WB); + pci_seg->dev_table_size) + : memremap(old_devtb_phys, pci_seg->dev_table_size, MEMREMAP_WB); if (!old_devtb) return false; gfp_flag = GFP_KERNEL | __GFP_ZERO | GFP_DMA32; pci_seg->old_dev_tbl_cpy = (void *)__get_free_pages(gfp_flag, - get_order(dev_table_size)); + get_order(pci_seg->dev_table_size)); if (pci_seg->old_dev_tbl_cpy == NULL) { pr_err("Failed to allocate memory for copying old device table!\n"); memunmap(old_devtb); @@ -1580,6 +1581,7 @@ static struct amd_iommu_pci_seg *__init alloc_pci_segment(u16 id, pci_seg->last_bdf = last_bdf; DUMP_printk("PCI segment : 0x%0x, last bdf : 0x%04x\n", id, last_bdf); + pci_seg->dev_table_size = tbl_size(DEV_TABLE_ENTRY_SIZE); pci_seg->id = id; init_llist_head(&pci_seg->dev_data_list); @@ -2675,7 +2677,7 @@ static void early_enable_iommus(void) for_each_pci_segment(pci_seg) { if (pci_seg->old_dev_tbl_cpy != NULL) { free_pages((unsigned long)pci_seg->old_dev_tbl_cpy, - get_order(dev_table_size)); + get_order(pci_seg->dev_table_size)); pci_seg->old_dev_tbl_cpy = NULL; } } @@ -2689,7 +2691,7 @@ static void early_enable_iommus(void) for_each_pci_segment(pci_seg) { free_pages((unsigned long)pci_seg->dev_table, - get_order(dev_table_size)); + get_order(pci_seg->dev_table_size)); pci_seg->dev_table = pci_seg->old_dev_tbl_cpy; } -- 2.27.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu