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x86: code cleanups in arch/x86/kernel/pci-gart_64.c

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code cleanups:

                                       errors   lines of code   errors/KLOC
 arch/x86/kernel/pci-gart_64.c            183             748         244.6
 arch/x86/kernel/pci-gart_64.c              0             790             0

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar
2008-01-30 13:30:12 +01:00
parent e8d591dc71
commit 05fccb0e38
1 changed files with 279 additions and 235 deletions
Download Patch File Download Diff File Expand all files Collapse all files

170
arch/x86/kernel/pci-gart_64.c
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@@ -42,16 +42,19 @@ static unsigned long iommu_pages; /* .. and in pages */
static u32 *iommu_gatt_base; /* Remapping table */ static u32 *iommu_gatt_base; /* Remapping table */
/* 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 flushed * If this is disabled the IOMMU will use an optimized flushing strategy
for every mapping. Problem is that doing the lazy flush seems to trigger * of only flushing when an mapping is reused. With it true the GART is
bugs with some popular PCI cards, in particular 3ware (but has been also * flushed for every mapping. Problem is that doing the lazy flush seems
also seen with Qlogic at least). */ * to trigger bugs with some popular PCI cards, in particular 3ware (but
* has been also also seen with Qlogic at least).
*/
int iommu_fullflush = 1; int iommu_fullflush = 1;
/* Allocation bitmap for the remapping area */ /* Allocation bitmap for the remapping area: */
static DEFINE_SPINLOCK(iommu_bitmap_lock); static DEFINE_SPINLOCK(iommu_bitmap_lock);
static unsigned long *iommu_gart_bitmap; /* guarded by iommu_bitmap_lock */ /* Guarded by iommu_bitmap_lock: */
static unsigned long *iommu_gart_bitmap;
static u32 gart_unmapped_entry; static u32 gart_unmapped_entry;
@@ -61,7 +64,7 @@ static u32 gart_unmapped_entry;
(((x) & 0xfffff000) | (((x) >> 32) << 4) | GPTE_VALID | GPTE_COHERENT) (((x) & 0xfffff000) | (((x) >> 32) << 4) | GPTE_VALID | GPTE_COHERENT)
#define GPTE_DECODE(x) (((x) & 0xfffff000) | (((u64)(x) & 0xff0) << 28)) #define GPTE_DECODE(x) (((x) & 0xfffff000) | (((u64)(x) & 0xff0) << 28))
#define to_pages(addr,size) \ #define to_pages(addr, size) \
(round_up(((addr) & ~PAGE_MASK) + (size), PAGE_SIZE) >> PAGE_SHIFT) (round_up(((addr) & ~PAGE_MASK) + (size), PAGE_SIZE) >> PAGE_SHIFT)
#define EMERGENCY_PAGES 32 /* = 128KB */ #define EMERGENCY_PAGES 32 /* = 128KB */
@@ -84,10 +87,12 @@ static unsigned long alloc_iommu(int size)
unsigned long offset, flags; unsigned long offset, flags;
spin_lock_irqsave(&iommu_bitmap_lock, flags); spin_lock_irqsave(&iommu_bitmap_lock, flags);
offset = find_next_zero_string(iommu_gart_bitmap,next_bit,iommu_pages,size); offset = find_next_zero_string(iommu_gart_bitmap, next_bit,
iommu_pages, size);
if (offset == -1) { if (offset == -1) {
need_flush = 1; need_flush = 1;
offset = find_next_zero_string(iommu_gart_bitmap,0,iommu_pages,size); offset = find_next_zero_string(iommu_gart_bitmap, 0,
iommu_pages, size);
} }
if (offset != -1) { if (offset != -1) {
set_bit_string(iommu_gart_bitmap, offset, size); set_bit_string(iommu_gart_bitmap, offset, size);
@@ -100,12 +105,14 @@ static unsigned long alloc_iommu(int size)
if (iommu_fullflush) if (iommu_fullflush)
need_flush = 1; need_flush = 1;
spin_unlock_irqrestore(&iommu_bitmap_lock, flags); spin_unlock_irqrestore(&iommu_bitmap_lock, flags);
return offset; return offset;
} }
static void free_iommu(unsigned long offset, int size) static void free_iommu(unsigned long offset, int size)
{ {
unsigned long flags; unsigned long flags;
spin_lock_irqsave(&iommu_bitmap_lock, flags); spin_lock_irqsave(&iommu_bitmap_lock, flags);
__clear_bit_string(iommu_gart_bitmap, offset, size); __clear_bit_string(iommu_gart_bitmap, offset, size);
spin_unlock_irqrestore(&iommu_bitmap_lock, flags); spin_unlock_irqrestore(&iommu_bitmap_lock, flags);
@@ -117,6 +124,7 @@ static void free_iommu(unsigned long offset, int size)
static void flush_gart(void) static void flush_gart(void)
{ {
unsigned long flags; unsigned long flags;
spin_lock_irqsave(&iommu_bitmap_lock, flags); spin_lock_irqsave(&iommu_bitmap_lock, flags);
if (need_flush) { if (need_flush) {
k8_flush_garts(); k8_flush_garts();
@@ -127,34 +135,46 @@ static void flush_gart(void)
#ifdef CONFIG_IOMMU_LEAK #ifdef CONFIG_IOMMU_LEAK
#define SET_LEAK(x) if (iommu_leak_tab) \ #define SET_LEAK(x) \
iommu_leak_tab[x] = __builtin_return_address(0); do { \
#define CLEAR_LEAK(x) if (iommu_leak_tab) \ if (iommu_leak_tab) \
iommu_leak_tab[x] = NULL; iommu_leak_tab[x] = __builtin_return_address(0);\
} while (0)
#define CLEAR_LEAK(x) \
do { \
if (iommu_leak_tab) \
iommu_leak_tab[x] = NULL; \
} while (0)
/* Debugging aid for drivers that don't free their IOMMU tables */ /* Debugging aid for drivers that don't free their IOMMU tables */
static void **iommu_leak_tab; static void **iommu_leak_tab;
static int leak_trace; static int leak_trace;
static int iommu_leak_pages = 20; static int iommu_leak_pages = 20;
static void dump_leak(void) static void dump_leak(void)
{ {
int i; int i;
static int dump; static int dump;
if (dump || !iommu_leak_tab) return;
if (dump || !iommu_leak_tab)
return;
dump = 1; dump = 1;
show_stack(NULL,NULL); show_stack(NULL, NULL);
/* Very crude. dump some from the end of the table too */ /* Very crude. dump some from the end of the table too */
printk("Dumping %d pages from end of IOMMU:\n", iommu_leak_pages); printk(KERN_DEBUG "Dumping %d pages from end of IOMMU:\n",
for (i = 0; i < iommu_leak_pages; i+=2) { iommu_leak_pages);
printk("%lu: ", iommu_pages-i); for (i = 0; i < iommu_leak_pages; i += 2) {
printk(KERN_DEBUG "%lu: ", iommu_pages-i);
printk_address((unsigned long) iommu_leak_tab[iommu_pages-i]); printk_address((unsigned long) iommu_leak_tab[iommu_pages-i]);
printk("%c", (i+1)%2 == 0 ? '\n' : ' '); printk(KERN_CONT "%c", (i+1)%2 == 0 ? '\n' : ' ');
} }
printk("\n"); printk(KERN_DEBUG "\n");
} }
#else #else
#define SET_LEAK(x) # define SET_LEAK(x)
#define CLEAR_LEAK(x) # define CLEAR_LEAK(x)
#endif #endif
static void iommu_full(struct device *dev, size_t size, int dir) static void iommu_full(struct device *dev, size_t size, int dir)
@@ -177,29 +197,34 @@ static void iommu_full(struct device *dev, size_t size, int dir)
if (dir == PCI_DMA_FROMDEVICE || dir == PCI_DMA_BIDIRECTIONAL) if (dir == PCI_DMA_FROMDEVICE || dir == PCI_DMA_BIDIRECTIONAL)
panic("PCI-DMA: Memory would be corrupted\n"); panic("PCI-DMA: Memory would be corrupted\n");
if (dir == PCI_DMA_TODEVICE || dir == PCI_DMA_BIDIRECTIONAL) if (dir == PCI_DMA_TODEVICE || dir == PCI_DMA_BIDIRECTIONAL)
panic(KERN_ERR "PCI-DMA: Random memory would be DMAed\n"); panic(KERN_ERR
"PCI-DMA: Random memory would be DMAed\n");
} }
#ifdef CONFIG_IOMMU_LEAK #ifdef CONFIG_IOMMU_LEAK
dump_leak(); dump_leak();
#endif #endif
} }
static inline int need_iommu(struct device *dev, unsigned long addr, size_t size) static inline int
need_iommu(struct device *dev, unsigned long addr, size_t size)
{ {
u64 mask = *dev->dma_mask; u64 mask = *dev->dma_mask;
int high = addr + size > mask; int high = addr + size > mask;
int mmu = high; int mmu = high;
if (force_iommu) if (force_iommu)
mmu = 1; mmu = 1;
return mmu; return mmu;
} }
static inline int nonforced_iommu(struct device *dev, unsigned long addr, size_t size) static inline int
nonforced_iommu(struct device *dev, unsigned long addr, size_t size)
{ {
u64 mask = *dev->dma_mask; u64 mask = *dev->dma_mask;
int high = addr + size > mask; int high = addr + size > mask;
int mmu = high; int mmu = high;
return mmu; return mmu;
} }
@@ -212,6 +237,7 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
unsigned long npages = to_pages(phys_mem, size); unsigned long npages = to_pages(phys_mem, size);
unsigned long iommu_page = alloc_iommu(npages); unsigned long iommu_page = alloc_iommu(npages);
int i; int i;
if (iommu_page == -1) { if (iommu_page == -1) {
if (!nonforced_iommu(dev, phys_mem, size)) if (!nonforced_iommu(dev, phys_mem, size))
return phys_mem; return phys_mem;
@@ -229,16 +255,19 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
return iommu_bus_base + iommu_page*PAGE_SIZE + (phys_mem & ~PAGE_MASK); return iommu_bus_base + iommu_page*PAGE_SIZE + (phys_mem & ~PAGE_MASK);
} }
static dma_addr_t gart_map_simple(struct device *dev, char *buf, static dma_addr_t
size_t size, int dir) gart_map_simple(struct device *dev, char *buf, size_t size, int dir)
{ {
dma_addr_t map = dma_map_area(dev, virt_to_bus(buf), size, dir); dma_addr_t map = dma_map_area(dev, virt_to_bus(buf), size, dir);
flush_gart(); flush_gart();
return map; return map;
} }
/* Map a single area into the IOMMU */ /* Map a single area into the IOMMU */
static dma_addr_t gart_map_single(struct device *dev, void *addr, size_t size, int dir) static dma_addr_t
gart_map_single(struct device *dev, void *addr, size_t size, int dir)
{ {
unsigned long phys_mem, bus; unsigned long phys_mem, bus;
@@ -250,6 +279,7 @@ static dma_addr_t gart_map_single(struct device *dev, void *addr, size_t size, i
return phys_mem; return phys_mem;
bus = gart_map_simple(dev, addr, size, dir); bus = gart_map_simple(dev, addr, size, dir);
return bus; return bus;
} }
@@ -266,6 +296,7 @@ static void gart_unmap_single(struct device *dev, dma_addr_t dma_addr,
if (dma_addr < iommu_bus_base + EMERGENCY_PAGES*PAGE_SIZE || if (dma_addr < iommu_bus_base + EMERGENCY_PAGES*PAGE_SIZE ||
dma_addr >= iommu_bus_base + iommu_size) dma_addr >= iommu_bus_base + iommu_size)
return; return;
iommu_page = (dma_addr - iommu_bus_base)>>PAGE_SHIFT; iommu_page = (dma_addr - iommu_bus_base)>>PAGE_SHIFT;
npages = to_pages(dma_addr, size); npages = to_pages(dma_addr, size);
for (i = 0; i < npages; i++) { for (i = 0; i < npages; i++) {
@@ -278,7 +309,8 @@ static void gart_unmap_single(struct device *dev, dma_addr_t dma_addr,
/* /*
* Wrapper for pci_unmap_single working with scatterlists. * Wrapper for pci_unmap_single working with scatterlists.
*/ */
static void gart_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, int dir) static void
gart_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
{ {
struct scatterlist *s; struct scatterlist *s;
int i; int i;
@@ -303,6 +335,7 @@ static int dma_map_sg_nonforce(struct device *dev, struct scatterlist *sg,
for_each_sg(sg, s, nents, i) { for_each_sg(sg, s, nents, i) {
unsigned long addr = sg_phys(s); unsigned long addr = sg_phys(s);
if (nonforced_iommu(dev, addr, s->length)) { if (nonforced_iommu(dev, addr, s->length)) {
addr = dma_map_area(dev, addr, s->length, dir); addr = dma_map_area(dev, addr, s->length, dir);
if (addr == bad_dma_address) { if (addr == bad_dma_address) {
@@ -317,6 +350,7 @@ static int dma_map_sg_nonforce(struct device *dev, struct scatterlist *sg,
s->dma_length = s->length; s->dma_length = s->length;
} }
flush_gart(); flush_gart();
return nents; return nents;
} }
@@ -355,11 +389,12 @@ static int __dma_map_cont(struct scatterlist *start, int nelems,
} }
} }
BUG_ON(iommu_page - iommu_start != pages); BUG_ON(iommu_page - iommu_start != pages);
return 0; return 0;
} }
static inline int dma_map_cont(struct scatterlist *start, int nelems, static inline int
struct scatterlist *sout, dma_map_cont(struct scatterlist *start, int nelems, struct scatterlist *sout,
unsigned long pages, int need) unsigned long pages, int need)
{ {
if (!need) { if (!need) {
@@ -375,15 +410,12 @@ static inline int dma_map_cont(struct scatterlist *start, int nelems,
* DMA map all entries in a scatterlist. * DMA map all entries in a scatterlist.
* Merge chunks that have page aligned sizes into a continuous mapping. * Merge chunks that have page aligned sizes into a continuous mapping.
*/ */
static int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, static int
int dir) gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
{ {
int i;
int out;
int start;
unsigned long pages = 0;
int need = 0, nextneed;
struct scatterlist *s, *ps, *start_sg, *sgmap; struct scatterlist *s, *ps, *start_sg, *sgmap;
int need = 0, nextneed, i, out, start;
unsigned long pages = 0;
if (nents == 0) if (nents == 0)
return 0; return 0;
@@ -397,6 +429,7 @@ static int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents,
ps = NULL; /* shut up gcc */ ps = NULL; /* shut up gcc */
for_each_sg(sg, s, nents, i) { for_each_sg(sg, s, nents, i) {
dma_addr_t addr = sg_phys(s); dma_addr_t addr = sg_phys(s);
s->dma_address = addr; s->dma_address = addr;
BUG_ON(s->length == 0); BUG_ON(s->length == 0);
@@ -404,8 +437,11 @@ static int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents,
/* Handle the previous not yet processed entries */ /* Handle the previous not yet processed entries */
if (i > start) { if (i > start) {
/* Can only merge when the last chunk ends on a page /*
boundary and the new one doesn't have an offset. */ * Can only merge when the last chunk ends on a
* page boundary and the new one doesn't have an
* offset.
*/
if (!iommu_merge || !nextneed || !need || s->offset || if (!iommu_merge || !nextneed || !need || s->offset ||
(ps->offset + ps->length) % PAGE_SIZE) { (ps->offset + ps->length) % PAGE_SIZE) {
if (dma_map_cont(start_sg, i - start, sgmap, if (dma_map_cont(start_sg, i - start, sgmap,
@@ -436,6 +472,7 @@ static int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents,
error: error:
flush_gart(); flush_gart();
gart_unmap_sg(dev, sg, out, dir); gart_unmap_sg(dev, sg, out, dir);
/* When it was forced or merged try again in a dumb way */ /* When it was forced or merged try again in a dumb way */
if (force_iommu || iommu_merge) { if (force_iommu || iommu_merge) {
out = dma_map_sg_nonforce(dev, sg, nents, dir); out = dma_map_sg_nonforce(dev, sg, nents, dir);
@@ -444,6 +481,7 @@ error:
} }
if (panic_on_overflow) if (panic_on_overflow)
panic("dma_map_sg: overflow on %lu pages\n", pages); panic("dma_map_sg: overflow on %lu pages\n", pages);
iommu_full(dev, pages << PAGE_SHIFT, dir); iommu_full(dev, pages << PAGE_SHIFT, dir);
for_each_sg(sg, s, nents, i) for_each_sg(sg, s, nents, i)
s->dma_address = bad_dma_address; s->dma_address = bad_dma_address;
@@ -455,6 +493,7 @@ static int no_agp;
static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size) static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size)
{ {
unsigned long a; unsigned long a;
if (!iommu_size) { if (!iommu_size) {
iommu_size = aper_size; iommu_size = aper_size;
if (!no_agp) if (!no_agp)
@@ -464,18 +503,20 @@ static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size)
a = aper + iommu_size; a = aper + iommu_size;
iommu_size -= round_up(a, LARGE_PAGE_SIZE) - a; iommu_size -= round_up(a, LARGE_PAGE_SIZE) - a;
if (iommu_size < 64*1024*1024) if (iommu_size < 64*1024*1024) {
printk(KERN_WARNING printk(KERN_WARNING
"PCI-DMA: Warning: Small IOMMU %luMB. Consider increasing the AGP aperture in BIOS\n",iommu_size>>20); "PCI-DMA: Warning: Small IOMMU %luMB."
" Consider increasing the AGP aperture in BIOS\n",
iommu_size >> 20);
}
return iommu_size; return iommu_size;
} }
static __init unsigned read_aperture(struct pci_dev *dev, u32 *size) static __init unsigned read_aperture(struct pci_dev *dev, u32 *size)
{ {
unsigned aper_size = 0, aper_base_32; unsigned aper_size = 0, aper_base_32, aper_order;
u64 aper_base; u64 aper_base;
unsigned aper_order;
pci_read_config_dword(dev, 0x94, &aper_base_32); pci_read_config_dword(dev, 0x94, &aper_base_32);
pci_read_config_dword(dev, 0x90, &aper_order); pci_read_config_dword(dev, 0x90, &aper_order);
@@ -498,10 +539,10 @@ static __init unsigned read_aperture(struct pci_dev *dev, u32 *size)
*/ */
static __init int init_k8_gatt(struct agp_kern_info *info) static __init int init_k8_gatt(struct agp_kern_info *info)
{ {
unsigned aper_size, gatt_size, new_aper_size;
unsigned aper_base, new_aper_base;
struct pci_dev *dev; struct pci_dev *dev;
void *gatt; void *gatt;
unsigned aper_base, new_aper_base;
unsigned aper_size, gatt_size, new_aper_size;
int i; int i;
printk(KERN_INFO "PCI-DMA: Disabling AGP.\n"); printk(KERN_INFO "PCI-DMA: Disabling AGP.\n");
@@ -523,13 +564,14 @@ static __init int init_k8_gatt(struct agp_kern_info *info)
if (!aper_base) if (!aper_base)
goto nommu; goto nommu;
info->aper_base = aper_base; info->aper_base = aper_base;
info->aper_size = aper_size>>20; info->aper_size = aper_size >> 20;
gatt_size = (aper_size >> PAGE_SHIFT) * sizeof(u32); gatt_size = (aper_size >> PAGE_SHIFT) * sizeof(u32);
gatt = (void *)__get_free_pages(GFP_KERNEL, get_order(gatt_size)); gatt = (void *)__get_free_pages(GFP_KERNEL, get_order(gatt_size));
if (!gatt) if (!gatt)
panic("Cannot allocate GATT table"); panic("Cannot allocate GATT table");
if (change_page_attr_addr((unsigned long)gatt, gatt_size >> PAGE_SHIFT, PAGE_KERNEL_NOCACHE)) if (change_page_attr_addr((unsigned long)gatt, gatt_size >> PAGE_SHIFT,
PAGE_KERNEL_NOCACHE))
panic("Could not set GART PTEs to uncacheable pages"); panic("Could not set GART PTEs to uncacheable pages");
global_flush_tlb(); global_flush_tlb();
@@ -537,8 +579,8 @@ static __init int init_k8_gatt(struct agp_kern_info *info)
agp_gatt_table = gatt; agp_gatt_table = gatt;
for (i = 0; i < num_k8_northbridges; i++) { for (i = 0; i < num_k8_northbridges; i++) {
u32 ctl;
u32 gatt_reg; u32 gatt_reg;
u32 ctl;
dev = k8_northbridges[i]; dev = k8_northbridges[i];
gatt_reg = __pa(gatt) >> 12; gatt_reg = __pa(gatt) >> 12;
@@ -553,7 +595,8 @@ static __init int init_k8_gatt(struct agp_kern_info *info)
} }
flush_gart(); flush_gart();
printk("PCI-DMA: aperture base @ %x size %u KB\n",aper_base, aper_size>>10); printk(KERN_INFO "PCI-DMA: aperture base @ %x size %u KB\n",
aper_base, aper_size>>10);
return 0; return 0;
nommu: nommu:
@@ -603,8 +646,8 @@ void gart_iommu_shutdown(void)
void __init gart_iommu_init(void) void __init gart_iommu_init(void)
{ {
struct agp_kern_info info; struct agp_kern_info info;
unsigned long aper_size;
unsigned long iommu_start; unsigned long iommu_start;
unsigned long aper_size;
unsigned long scratch; unsigned long scratch;
long i; long i;
@@ -647,7 +690,7 @@ void __init gart_iommu_init(void)
iommu_size = check_iommu_size(info.aper_base, aper_size); iommu_size = check_iommu_size(info.aper_base, aper_size);
iommu_pages = iommu_size >> PAGE_SHIFT; iommu_pages = iommu_size >> PAGE_SHIFT;
iommu_gart_bitmap = (void*)__get_free_pages(GFP_KERNEL, iommu_gart_bitmap = (void *) __get_free_pages(GFP_KERNEL,
get_order(iommu_pages/8)); get_order(iommu_pages/8));
if (!iommu_gart_bitmap) if (!iommu_gart_bitmap)
panic("Cannot allocate iommu bitmap\n"); panic("Cannot allocate iommu bitmap\n");
@@ -660,7 +703,8 @@ void __init gart_iommu_init(void)
if (iommu_leak_tab) if (iommu_leak_tab)
memset(iommu_leak_tab, 0, iommu_pages * 8); memset(iommu_leak_tab, 0, iommu_pages * 8);
else else
printk("PCI-DMA: Cannot allocate leak trace area\n"); printk(KERN_DEBUG
"PCI-DMA: Cannot allocate leak trace area\n");
} }
#endif #endif
@@ -673,7 +717,7 @@ void __init gart_iommu_init(void)
agp_memory_reserved = iommu_size; agp_memory_reserved = iommu_size;
printk(KERN_INFO printk(KERN_INFO
"PCI-DMA: Reserving %luMB of IOMMU area in the AGP aperture\n", "PCI-DMA: Reserving %luMB of IOMMU area in the AGP aperture\n",
iommu_size>>20); iommu_size >> 20);
iommu_start = aper_size - iommu_size; iommu_start = aper_size - iommu_size;
iommu_bus_base = info.aper_base + iommu_start; iommu_bus_base = info.aper_base + iommu_start;
@@ -713,7 +757,7 @@ void __init gart_parse_options(char *p)
int arg; int arg;
#ifdef CONFIG_IOMMU_LEAK #ifdef CONFIG_IOMMU_LEAK
if (!strncmp(p,"leak",4)) { if (!strncmp(p, "leak", 4)) {
leak_trace = 1; leak_trace = 1;
p += 4; p += 4;
if (*p == '=') ++p; if (*p == '=') ++p;
@@ -723,18 +767,18 @@ void __init gart_parse_options(char *p)
#endif #endif
if (isdigit(*p) && get_option(&p, &arg)) if (isdigit(*p) && get_option(&p, &arg))
iommu_size = arg; iommu_size = arg;
if (!strncmp(p, "fullflush",8)) if (!strncmp(p, "fullflush", 8))
iommu_fullflush = 1; iommu_fullflush = 1;
if (!strncmp(p, "nofullflush",11)) if (!strncmp(p, "nofullflush", 11))
iommu_fullflush = 0; iommu_fullflush = 0;
if (!strncmp(p,"noagp",5)) if (!strncmp(p, "noagp", 5))
no_agp = 1; no_agp = 1;
if (!strncmp(p, "noaperture",10)) if (!strncmp(p, "noaperture", 10))
fix_aperture = 0; fix_aperture = 0;
/* duplicated from pci-dma.c */ /* duplicated from pci-dma.c */
if (!strncmp(p,"force",5)) if (!strncmp(p, "force", 5))
gart_iommu_aperture_allowed = 1; gart_iommu_aperture_allowed = 1;
if (!strncmp(p,"allowed",7)) if (!strncmp(p, "allowed", 7))
gart_iommu_aperture_allowed = 1; gart_iommu_aperture_allowed = 1;
if (!strncmp(p, "memaper", 7)) { if (!strncmp(p, "memaper", 7)) {
fallback_aper_force = 1; fallback_aper_force = 1;