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Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/Kconfig2
-rw-r--r--arch/x86/kernel/amd_gart_64.c63
-rw-r--r--arch/x86/kernel/pci-calgary_64.c30
-rw-r--r--arch/x86/kernel/pci-dma.c2
-rw-r--r--arch/x86/kernel/pci-swiotlb.c4
-rw-r--r--arch/x86/mm/mem_encrypt.c7
-rw-r--r--arch/x86/pci/sta2x11-fixup.c1
7 files changed, 15 insertions, 94 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c7094f813183..57552f2b37eb 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -66,7 +66,6 @@ config X86
select ARCH_HAS_UACCESS_FLUSHCACHE if X86_64
select ARCH_HAS_UACCESS_MCSAFE if X86_64 && X86_MCE
select ARCH_HAS_SET_MEMORY
- select ARCH_HAS_SG_CHAIN
select ARCH_HAS_STRICT_KERNEL_RWX
select ARCH_HAS_STRICT_MODULE_RWX
select ARCH_HAS_SYNC_CORE_BEFORE_USERMODE
@@ -90,7 +89,6 @@ config X86
select CLOCKSOURCE_VALIDATE_LAST_CYCLE
select CLOCKSOURCE_WATCHDOG
select DCACHE_WORD_ACCESS
- select DMA_DIRECT_OPS
select EDAC_ATOMIC_SCRUB
select EDAC_SUPPORT
select GENERIC_CLOCKEVENTS
diff --git a/arch/x86/kernel/amd_gart_64.c b/arch/x86/kernel/amd_gart_64.c
index 3f9d1b4019bb..e0ff3ac8c127 100644
--- a/arch/x86/kernel/amd_gart_64.c
+++ b/arch/x86/kernel/amd_gart_64.c
@@ -50,8 +50,6 @@ static unsigned long iommu_pages; /* .. and in pages */
static u32 *iommu_gatt_base; /* Remapping table */
-static dma_addr_t bad_dma_addr;
-
/*
* If this is disabled the IOMMU will use an optimized flushing strategy
* of only flushing when an mapping is reused. With it true the GART is
@@ -74,8 +72,6 @@ static u32 gart_unmapped_entry;
(((x) & 0xfffff000) | (((x) >> 32) << 4) | GPTE_VALID | GPTE_COHERENT)
#define GPTE_DECODE(x) (((x) & 0xfffff000) | (((u64)(x) & 0xff0) << 28))
-#define EMERGENCY_PAGES 32 /* = 128KB */
-
#ifdef CONFIG_AGP
#define AGPEXTERN extern
#else
@@ -155,9 +151,6 @@ static void flush_gart(void)
#ifdef CONFIG_IOMMU_LEAK
/* Debugging aid for drivers that don't free their IOMMU tables */
-static int leak_trace;
-static int iommu_leak_pages = 20;
-
static void dump_leak(void)
{
static int dump;
@@ -184,14 +177,6 @@ static void iommu_full(struct device *dev, size_t size, int dir)
*/
dev_err(dev, "PCI-DMA: Out of IOMMU space for %lu bytes\n", size);
-
- if (size > PAGE_SIZE*EMERGENCY_PAGES) {
- if (dir == PCI_DMA_FROMDEVICE || dir == PCI_DMA_BIDIRECTIONAL)
- panic("PCI-DMA: Memory would be corrupted\n");
- if (dir == PCI_DMA_TODEVICE || dir == PCI_DMA_BIDIRECTIONAL)
- panic(KERN_ERR
- "PCI-DMA: Random memory would be DMAed\n");
- }
#ifdef CONFIG_IOMMU_LEAK
dump_leak();
#endif
@@ -220,7 +205,7 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
int i;
if (unlikely(phys_mem + size > GART_MAX_PHYS_ADDR))
- return bad_dma_addr;
+ return DMA_MAPPING_ERROR;
iommu_page = alloc_iommu(dev, npages, align_mask);
if (iommu_page == -1) {
@@ -229,7 +214,7 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
if (panic_on_overflow)
panic("dma_map_area overflow %lu bytes\n", size);
iommu_full(dev, size, dir);
- return bad_dma_addr;
+ return DMA_MAPPING_ERROR;
}
for (i = 0; i < npages; i++) {
@@ -271,7 +256,7 @@ static void gart_unmap_page(struct device *dev, dma_addr_t dma_addr,
int npages;
int i;
- if (dma_addr < iommu_bus_base + EMERGENCY_PAGES*PAGE_SIZE ||
+ if (dma_addr == DMA_MAPPING_ERROR ||
dma_addr >= iommu_bus_base + iommu_size)
return;
@@ -315,7 +300,7 @@ static int dma_map_sg_nonforce(struct device *dev, struct scatterlist *sg,
if (nonforced_iommu(dev, addr, s->length)) {
addr = dma_map_area(dev, addr, s->length, dir, 0);
- if (addr == bad_dma_addr) {
+ if (addr == DMA_MAPPING_ERROR) {
if (i > 0)
gart_unmap_sg(dev, sg, i, dir, 0);
nents = 0;
@@ -471,7 +456,7 @@ error:
iommu_full(dev, pages << PAGE_SHIFT, dir);
for_each_sg(sg, s, nents, i)
- s->dma_address = bad_dma_addr;
+ s->dma_address = DMA_MAPPING_ERROR;
return 0;
}
@@ -490,7 +475,7 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
*dma_addr = dma_map_area(dev, virt_to_phys(vaddr), size,
DMA_BIDIRECTIONAL, (1UL << get_order(size)) - 1);
flush_gart();
- if (unlikely(*dma_addr == bad_dma_addr))
+ if (unlikely(*dma_addr == DMA_MAPPING_ERROR))
goto out_free;
return vaddr;
out_free:
@@ -507,11 +492,6 @@ gart_free_coherent(struct device *dev, size_t size, void *vaddr,
dma_direct_free_pages(dev, size, vaddr, dma_addr, attrs);
}
-static int gart_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
- return (dma_addr == bad_dma_addr);
-}
-
static int no_agp;
static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size)
@@ -695,7 +675,6 @@ static const struct dma_map_ops gart_dma_ops = {
.unmap_page = gart_unmap_page,
.alloc = gart_alloc_coherent,
.free = gart_free_coherent,
- .mapping_error = gart_mapping_error,
.dma_supported = dma_direct_supported,
};
@@ -730,7 +709,6 @@ int __init gart_iommu_init(void)
unsigned long aper_base, aper_size;
unsigned long start_pfn, end_pfn;
unsigned long scratch;
- long i;
if (!amd_nb_has_feature(AMD_NB_GART))
return 0;
@@ -774,29 +752,12 @@ int __init gart_iommu_init(void)
if (!iommu_gart_bitmap)
panic("Cannot allocate iommu bitmap\n");
-#ifdef CONFIG_IOMMU_LEAK
- if (leak_trace) {
- int ret;
-
- ret = dma_debug_resize_entries(iommu_pages);
- if (ret)
- pr_debug("PCI-DMA: Cannot trace all the entries\n");
- }
-#endif
-
- /*
- * Out of IOMMU space handling.
- * Reserve some invalid pages at the beginning of the GART.
- */
- bitmap_set(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
-
pr_info("PCI-DMA: Reserving %luMB of IOMMU area in the AGP aperture\n",
iommu_size >> 20);
agp_memory_reserved = iommu_size;
iommu_start = aper_size - iommu_size;
iommu_bus_base = info.aper_base + iommu_start;
- bad_dma_addr = iommu_bus_base;
iommu_gatt_base = agp_gatt_table + (iommu_start>>PAGE_SHIFT);
/*
@@ -838,8 +799,6 @@ int __init gart_iommu_init(void)
if (!scratch)
panic("Cannot allocate iommu scratch page");
gart_unmapped_entry = GPTE_ENCODE(__pa(scratch));
- for (i = EMERGENCY_PAGES; i < iommu_pages; i++)
- iommu_gatt_base[i] = gart_unmapped_entry;
flush_gart();
dma_ops = &gart_dma_ops;
@@ -853,16 +812,6 @@ void __init gart_parse_options(char *p)
{
int arg;
-#ifdef CONFIG_IOMMU_LEAK
- if (!strncmp(p, "leak", 4)) {
- leak_trace = 1;
- p += 4;
- if (*p == '=')
- ++p;
- if (isdigit(*p) && get_option(&p, &arg))
- iommu_leak_pages = arg;
- }
-#endif
if (isdigit(*p) && get_option(&p, &arg))
iommu_size = arg;
if (!strncmp(p, "fullflush", 9))
diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
index bbfc8b1e9104..c70720f61a34 100644
--- a/arch/x86/kernel/pci-calgary_64.c
+++ b/arch/x86/kernel/pci-calgary_64.c
@@ -51,8 +51,6 @@
#include <asm/x86_init.h>
#include <asm/iommu_table.h>
-#define CALGARY_MAPPING_ERROR 0
-
#ifdef CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT
int use_calgary __read_mostly = 1;
#else
@@ -157,8 +155,6 @@ static const unsigned long phb_debug_offsets[] = {
#define PHB_DEBUG_STUFF_OFFSET 0x0020
-#define EMERGENCY_PAGES 32 /* = 128KB */
-
unsigned int specified_table_size = TCE_TABLE_SIZE_UNSPECIFIED;
static int translate_empty_slots __read_mostly = 0;
static int calgary_detected __read_mostly = 0;
@@ -255,7 +251,7 @@ static unsigned long iommu_range_alloc(struct device *dev,
if (panic_on_overflow)
panic("Calgary: fix the allocator.\n");
else
- return CALGARY_MAPPING_ERROR;
+ return DMA_MAPPING_ERROR;
}
}
@@ -274,11 +270,10 @@ static dma_addr_t iommu_alloc(struct device *dev, struct iommu_table *tbl,
dma_addr_t ret;
entry = iommu_range_alloc(dev, tbl, npages);
-
- if (unlikely(entry == CALGARY_MAPPING_ERROR)) {
+ if (unlikely(entry == DMA_MAPPING_ERROR)) {
pr_warn("failed to allocate %u pages in iommu %p\n",
npages, tbl);
- return CALGARY_MAPPING_ERROR;
+ return DMA_MAPPING_ERROR;
}
/* set the return dma address */
@@ -294,12 +289,10 @@ static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr,
unsigned int npages)
{
unsigned long entry;
- unsigned long badend;
unsigned long flags;
/* were we called with bad_dma_address? */
- badend = CALGARY_MAPPING_ERROR + (EMERGENCY_PAGES * PAGE_SIZE);
- if (unlikely(dma_addr < badend)) {
+ if (unlikely(dma_addr == DMA_MAPPING_ERROR)) {
WARN(1, KERN_ERR "Calgary: driver tried unmapping bad DMA "
"address 0x%Lx\n", dma_addr);
return;
@@ -383,7 +376,7 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg,
npages = iommu_num_pages(vaddr, s->length, PAGE_SIZE);
entry = iommu_range_alloc(dev, tbl, npages);
- if (entry == CALGARY_MAPPING_ERROR) {
+ if (entry == DMA_MAPPING_ERROR) {
/* makes sure unmap knows to stop */
s->dma_length = 0;
goto error;
@@ -401,7 +394,7 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg,
error:
calgary_unmap_sg(dev, sg, nelems, dir, 0);
for_each_sg(sg, s, nelems, i) {
- sg->dma_address = CALGARY_MAPPING_ERROR;
+ sg->dma_address = DMA_MAPPING_ERROR;
sg->dma_length = 0;
}
return 0;
@@ -454,7 +447,7 @@ static void* calgary_alloc_coherent(struct device *dev, size_t size,
/* set up tces to cover the allocated range */
mapping = iommu_alloc(dev, tbl, ret, npages, DMA_BIDIRECTIONAL);
- if (mapping == CALGARY_MAPPING_ERROR)
+ if (mapping == DMA_MAPPING_ERROR)
goto free;
*dma_handle = mapping;
return ret;
@@ -479,11 +472,6 @@ static void calgary_free_coherent(struct device *dev, size_t size,
free_pages((unsigned long)vaddr, get_order(size));
}
-static int calgary_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
- return dma_addr == CALGARY_MAPPING_ERROR;
-}
-
static const struct dma_map_ops calgary_dma_ops = {
.alloc = calgary_alloc_coherent,
.free = calgary_free_coherent,
@@ -491,7 +479,6 @@ static const struct dma_map_ops calgary_dma_ops = {
.unmap_sg = calgary_unmap_sg,
.map_page = calgary_map_page,
.unmap_page = calgary_unmap_page,
- .mapping_error = calgary_mapping_error,
.dma_supported = dma_direct_supported,
};
@@ -739,9 +726,6 @@ static void __init calgary_reserve_regions(struct pci_dev *dev)
u64 start;
struct iommu_table *tbl = pci_iommu(dev->bus);
- /* reserve EMERGENCY_PAGES from bad_dma_address and up */
- iommu_range_reserve(tbl, CALGARY_MAPPING_ERROR, EMERGENCY_PAGES);
-
/* avoid the BIOS/VGA first 640KB-1MB region */
/* for CalIOC2 - avoid the entire first MB */
if (is_calgary(dev->device)) {
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index f4562fcec681..d460998ae828 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -17,7 +17,7 @@
static bool disable_dac_quirk __read_mostly;
-const struct dma_map_ops *dma_ops = &dma_direct_ops;
+const struct dma_map_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);
#ifdef CONFIG_IOMMU_DEBUG
diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c
index bd08b9e1c9e2..5f5302028a9a 100644
--- a/arch/x86/kernel/pci-swiotlb.c
+++ b/arch/x86/kernel/pci-swiotlb.c
@@ -62,10 +62,8 @@ IOMMU_INIT(pci_swiotlb_detect_4gb,
void __init pci_swiotlb_init(void)
{
- if (swiotlb) {
+ if (swiotlb)
swiotlb_init(0);
- dma_ops = &swiotlb_dma_ops;
- }
}
void __init pci_swiotlb_late_init(void)
diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
index 006f373f54ab..385afa2b9e17 100644
--- a/arch/x86/mm/mem_encrypt.c
+++ b/arch/x86/mm/mem_encrypt.c
@@ -381,13 +381,6 @@ void __init mem_encrypt_init(void)
swiotlb_update_mem_attributes();
/*
- * With SEV, DMA operations cannot use encryption, we need to use
- * SWIOTLB to bounce buffer DMA operation.
- */
- if (sev_active())
- dma_ops = &swiotlb_dma_ops;
-
- /*
* With SEV, we need to unroll the rep string I/O instructions.
*/
if (sev_active())
diff --git a/arch/x86/pci/sta2x11-fixup.c b/arch/x86/pci/sta2x11-fixup.c
index 7a5bafb76d77..3cdafea55ab6 100644
--- a/arch/x86/pci/sta2x11-fixup.c
+++ b/arch/x86/pci/sta2x11-fixup.c
@@ -168,7 +168,6 @@ static void sta2x11_setup_pdev(struct pci_dev *pdev)
return;
pci_set_consistent_dma_mask(pdev, STA2X11_AMBA_SIZE - 1);
pci_set_dma_mask(pdev, STA2X11_AMBA_SIZE - 1);
- pdev->dev.dma_ops = &swiotlb_dma_ops;
pdev->dev.archdata.is_sta2x11 = true;
/* We must enable all devices as master, for audio DMA to work */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 22:51:34 +0000