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-rw-r--r--arch/x86/boot/early_serial_console.c14
-rw-r--r--arch/x86/include/asm/amd_iommu_proto.h6
-rw-r--r--arch/x86/include/asm/amd_iommu_types.h12
-rw-r--r--arch/x86/kernel/amd_iommu.c4
-rw-r--r--arch/x86/kernel/amd_iommu_init.c67
5 files changed, 79 insertions, 24 deletions
diff --git a/arch/x86/boot/early_serial_console.c b/arch/x86/boot/early_serial_console.c
index 030f4b93e255..5df2869c874b 100644
--- a/arch/x86/boot/early_serial_console.c
+++ b/arch/x86/boot/early_serial_console.c
@@ -58,7 +58,19 @@ static void parse_earlyprintk(void)
58 if (arg[pos] == ',') 58 if (arg[pos] == ',')
59 pos++; 59 pos++;
60 60
61 if (!strncmp(arg, "ttyS", 4)) { 61 /*
62 * make sure we have
63 * "serial,0x3f8,115200"
64 * "serial,ttyS0,115200"
65 * "ttyS0,115200"
66 */
67 if (pos == 7 && !strncmp(arg + pos, "0x", 2)) {
68 port = simple_strtoull(arg + pos, &e, 16);
69 if (port == 0 || arg + pos == e)
70 port = DEFAULT_SERIAL_PORT;
71 else
72 pos = e - arg;
73 } else if (!strncmp(arg + pos, "ttyS", 4)) {
62 static const int bases[] = { 0x3f8, 0x2f8 }; 74 static const int bases[] = { 0x3f8, 0x2f8 };
63 int idx = 0; 75 int idx = 0;
64 76
diff --git a/arch/x86/include/asm/amd_iommu_proto.h b/arch/x86/include/asm/amd_iommu_proto.h
index d2544f1d705d..cb030374b90a 100644
--- a/arch/x86/include/asm/amd_iommu_proto.h
+++ b/arch/x86/include/asm/amd_iommu_proto.h
@@ -38,4 +38,10 @@ static inline void amd_iommu_stats_init(void) { }
38 38
39#endif /* !CONFIG_AMD_IOMMU_STATS */ 39#endif /* !CONFIG_AMD_IOMMU_STATS */
40 40
41static inline bool is_rd890_iommu(struct pci_dev *pdev)
42{
43 return (pdev->vendor == PCI_VENDOR_ID_ATI) &&
44 (pdev->device == PCI_DEVICE_ID_RD890_IOMMU);
45}
46
41#endif /* _ASM_X86_AMD_IOMMU_PROTO_H */ 47#endif /* _ASM_X86_AMD_IOMMU_PROTO_H */
diff --git a/arch/x86/include/asm/amd_iommu_types.h b/arch/x86/include/asm/amd_iommu_types.h
index 7014e88bc779..08616180deaf 100644
--- a/arch/x86/include/asm/amd_iommu_types.h
+++ b/arch/x86/include/asm/amd_iommu_types.h
@@ -368,6 +368,9 @@ struct amd_iommu {
368 /* capabilities of that IOMMU read from ACPI */ 368 /* capabilities of that IOMMU read from ACPI */
369 u32 cap; 369 u32 cap;
370 370
371 /* flags read from acpi table */
372 u8 acpi_flags;
373
371 /* 374 /*
372 * Capability pointer. There could be more than one IOMMU per PCI 375 * Capability pointer. There could be more than one IOMMU per PCI
373 * device function if there are more than one AMD IOMMU capability 376 * device function if there are more than one AMD IOMMU capability
@@ -411,6 +414,15 @@ struct amd_iommu {
411 414
412 /* default dma_ops domain for that IOMMU */ 415 /* default dma_ops domain for that IOMMU */
413 struct dma_ops_domain *default_dom; 416 struct dma_ops_domain *default_dom;
417
418 /*
419 * This array is required to work around a potential BIOS bug.
420 * The BIOS may miss to restore parts of the PCI configuration
421 * space when the system resumes from S3. The result is that the
422 * IOMMU does not execute commands anymore which leads to system
423 * failure.
424 */
425 u32 cache_cfg[4];
414}; 426};
415 427
416/* 428/*
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index fa044e1e30a2..679b6450382b 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1953,6 +1953,7 @@ static void __unmap_single(struct dma_ops_domain *dma_dom,
1953 size_t size, 1953 size_t size,
1954 int dir) 1954 int dir)
1955{ 1955{
1956 dma_addr_t flush_addr;
1956 dma_addr_t i, start; 1957 dma_addr_t i, start;
1957 unsigned int pages; 1958 unsigned int pages;
1958 1959
@@ -1960,6 +1961,7 @@ static void __unmap_single(struct dma_ops_domain *dma_dom,
1960 (dma_addr + size > dma_dom->aperture_size)) 1961 (dma_addr + size > dma_dom->aperture_size))
1961 return; 1962 return;
1962 1963
1964 flush_addr = dma_addr;
1963 pages = iommu_num_pages(dma_addr, size, PAGE_SIZE); 1965 pages = iommu_num_pages(dma_addr, size, PAGE_SIZE);
1964 dma_addr &= PAGE_MASK; 1966 dma_addr &= PAGE_MASK;
1965 start = dma_addr; 1967 start = dma_addr;
@@ -1974,7 +1976,7 @@ static void __unmap_single(struct dma_ops_domain *dma_dom,
1974 dma_ops_free_addresses(dma_dom, dma_addr, pages); 1976 dma_ops_free_addresses(dma_dom, dma_addr, pages);
1975 1977
1976 if (amd_iommu_unmap_flush || dma_dom->need_flush) { 1978 if (amd_iommu_unmap_flush || dma_dom->need_flush) {
1977 iommu_flush_pages(&dma_dom->domain, dma_addr, size); 1979 iommu_flush_pages(&dma_dom->domain, flush_addr, size);
1978 dma_dom->need_flush = false; 1980 dma_dom->need_flush = false;
1979 } 1981 }
1980} 1982}
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 3cc63e2b8dd4..5a170cbbbed8 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -632,6 +632,13 @@ static void __init init_iommu_from_pci(struct amd_iommu *iommu)
632 iommu->last_device = calc_devid(MMIO_GET_BUS(range), 632 iommu->last_device = calc_devid(MMIO_GET_BUS(range),
633 MMIO_GET_LD(range)); 633 MMIO_GET_LD(range));
634 iommu->evt_msi_num = MMIO_MSI_NUM(misc); 634 iommu->evt_msi_num = MMIO_MSI_NUM(misc);
635
636 if (is_rd890_iommu(iommu->dev)) {
637 pci_read_config_dword(iommu->dev, 0xf0, &iommu->cache_cfg[0]);
638 pci_read_config_dword(iommu->dev, 0xf4, &iommu->cache_cfg[1]);
639 pci_read_config_dword(iommu->dev, 0xf8, &iommu->cache_cfg[2]);
640 pci_read_config_dword(iommu->dev, 0xfc, &iommu->cache_cfg[3]);
641 }
635} 642}
636 643
637/* 644/*
@@ -649,29 +656,9 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu,
649 struct ivhd_entry *e; 656 struct ivhd_entry *e;
650 657
651 /* 658 /*
652 * First set the recommended feature enable bits from ACPI 659 * First save the recommended feature enable bits from ACPI
653 * into the IOMMU control registers
654 */ 660 */
655 h->flags & IVHD_FLAG_HT_TUN_EN_MASK ? 661 iommu->acpi_flags = h->flags;
656 iommu_feature_enable(iommu, CONTROL_HT_TUN_EN) :
657 iommu_feature_disable(iommu, CONTROL_HT_TUN_EN);
658
659 h->flags & IVHD_FLAG_PASSPW_EN_MASK ?
660 iommu_feature_enable(iommu, CONTROL_PASSPW_EN) :
661 iommu_feature_disable(iommu, CONTROL_PASSPW_EN);
662
663 h->flags & IVHD_FLAG_RESPASSPW_EN_MASK ?
664 iommu_feature_enable(iommu, CONTROL_RESPASSPW_EN) :
665 iommu_feature_disable(iommu, CONTROL_RESPASSPW_EN);
666
667 h->flags & IVHD_FLAG_ISOC_EN_MASK ?
668 iommu_feature_enable(iommu, CONTROL_ISOC_EN) :
669 iommu_feature_disable(iommu, CONTROL_ISOC_EN);
670
671 /*
672 * make IOMMU memory accesses cache coherent
673 */
674 iommu_feature_enable(iommu, CONTROL_COHERENT_EN);
675 662
676 /* 663 /*
677 * Done. Now parse the device entries 664 * Done. Now parse the device entries
@@ -1116,6 +1103,40 @@ static void init_device_table(void)
1116 } 1103 }
1117} 1104}
1118 1105
1106static void iommu_init_flags(struct amd_iommu *iommu)
1107{
1108 iommu->acpi_flags & IVHD_FLAG_HT_TUN_EN_MASK ?
1109 iommu_feature_enable(iommu, CONTROL_HT_TUN_EN) :
1110 iommu_feature_disable(iommu, CONTROL_HT_TUN_EN);
1111
1112 iommu->acpi_flags & IVHD_FLAG_PASSPW_EN_MASK ?
1113 iommu_feature_enable(iommu, CONTROL_PASSPW_EN) :
1114 iommu_feature_disable(iommu, CONTROL_PASSPW_EN);
1115
1116 iommu->acpi_flags & IVHD_FLAG_RESPASSPW_EN_MASK ?
1117 iommu_feature_enable(iommu, CONTROL_RESPASSPW_EN) :
1118 iommu_feature_disable(iommu, CONTROL_RESPASSPW_EN);
1119
1120 iommu->acpi_flags & IVHD_FLAG_ISOC_EN_MASK ?
1121 iommu_feature_enable(iommu, CONTROL_ISOC_EN) :
1122 iommu_feature_disable(iommu, CONTROL_ISOC_EN);
1123
1124 /*
1125 * make IOMMU memory accesses cache coherent
1126 */
1127 iommu_feature_enable(iommu, CONTROL_COHERENT_EN);
1128}
1129
1130static void iommu_apply_quirks(struct amd_iommu *iommu)
1131{
1132 if (is_rd890_iommu(iommu->dev)) {
1133 pci_write_config_dword(iommu->dev, 0xf0, iommu->cache_cfg[0]);
1134 pci_write_config_dword(iommu->dev, 0xf4, iommu->cache_cfg[1]);
1135 pci_write_config_dword(iommu->dev, 0xf8, iommu->cache_cfg[2]);
1136 pci_write_config_dword(iommu->dev, 0xfc, iommu->cache_cfg[3]);
1137 }
1138}
1139
1119/* 1140/*
1120 * This function finally enables all IOMMUs found in the system after 1141 * This function finally enables all IOMMUs found in the system after
1121 * they have been initialized 1142 * they have been initialized
@@ -1126,6 +1147,8 @@ static void enable_iommus(void)
1126 1147
1127 for_each_iommu(iommu) { 1148 for_each_iommu(iommu) {
1128 iommu_disable(iommu); 1149 iommu_disable(iommu);
1150 iommu_apply_quirks(iommu);
1151 iommu_init_flags(iommu);
1129 iommu_set_device_table(iommu); 1152 iommu_set_device_table(iommu);
1130 iommu_enable_command_buffer(iommu); 1153 iommu_enable_command_buffer(iommu);
1131 iommu_enable_event_buffer(iommu); 1154 iommu_enable_event_buffer(iommu);