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linux-davinci-2.6.23
Commit 3e4d2650 authored by David S. Miller's avatar David S. Miller
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[SPARC64]: Convert SBUS over to generic iommu/strbuf structs. 

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 66875088
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Showing with 132 additions and 97 deletions
arch/sparc64/kernel/sbus.c
View file @ 3e4d2650
......@@ -26,17 +26,9 @@
#define MAP_BASE ((u32)0xc0000000)
struct sbus_iommu {
spinlock_t lock;
struct iommu_arena arena;
iopte_t *page_table;
unsigned long strbuf_regs;
unsigned long iommu_regs;
unsigned long sbus_control_reg;
volatile unsigned long strbuf_flushflag;
struct sbus_info {
struct iommu iommu;
struct strbuf strbuf;
};
/* Offsets from iommu_regs */
......@@ -52,16 +44,17 @@ struct sbus_iommu {
#define IOMMU_DRAM_VALID (1UL << 30UL)
static void __iommu_flushall(struct sbus_iommu *iommu)
static void __iommu_flushall(struct iommu *iommu)
{
unsigned long tag = iommu->iommu_regs + IOMMU_TAGDIAG;
unsigned long tag;
int entry;
tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL);
for (entry = 0; entry < 16; entry++) {
upa_writeq(0, tag);
tag += 8UL;
}
upa_readq(iommu->sbus_control_reg);
upa_readq(iommu->write_complete_reg);
}
/* Offsets from strbuf_regs */
......@@ -76,15 +69,14 @@ static void __iommu_flushall(struct sbus_iommu *iommu)
#define STRBUF_TAG_VALID 0x02UL
static void sbus_strbuf_flush(struct sbus_iommu *iommu, u32 base, unsigned long npages, int direction)
static void sbus_strbuf_flush(struct iommu *iommu, struct strbuf *strbuf, u32 base, unsigned long npages, int direction)
{
unsigned long n;
int limit;
n = npages;
while (n--)
upa_writeq(base + (n << IO_PAGE_SHIFT),
iommu->strbuf_regs + STRBUF_PFLUSH);
upa_writeq(base + (n << IO_PAGE_SHIFT), strbuf->strbuf_pflush);
/* If the device could not have possibly put dirty data into
* the streaming cache, no flush-flag synchronization needs
......@@ -93,15 +85,14 @@ static void sbus_strbuf_flush(struct sbus_iommu *iommu, u32 base, unsigned long
if (direction == SBUS_DMA_TODEVICE)
return;
iommu->strbuf_flushflag = 0UL;
*(strbuf->strbuf_flushflag) = 0UL;
/* Whoopee cushion! */
upa_writeq(__pa(&iommu->strbuf_flushflag),
iommu->strbuf_regs + STRBUF_FSYNC);
upa_readq(iommu->sbus_control_reg);
upa_writeq(strbuf->strbuf_flushflag_pa, strbuf->strbuf_fsync);
upa_readq(iommu->write_complete_reg);
limit = 100000;
while (iommu->strbuf_flushflag == 0UL) {
while (*(strbuf->strbuf_flushflag) == 0UL) {
limit--;
if (!limit)
break;
......@@ -115,7 +106,7 @@ static void sbus_strbuf_flush(struct sbus_iommu *iommu, u32 base, unsigned long
}
/* Based largely upon the ppc64 iommu allocator. */
static long sbus_arena_alloc(struct sbus_iommu *iommu, unsigned long npages)
static long sbus_arena_alloc(struct iommu *iommu, unsigned long npages)
{
struct iommu_arena *arena = &iommu->arena;
unsigned long n, i, start, end, limit;
......@@ -164,7 +155,7 @@ static void sbus_arena_free(struct iommu_arena *arena, unsigned long base, unsig
__clear_bit(i, arena->map);
}
static void sbus_iommu_table_init(struct sbus_iommu *iommu, unsigned int tsbsize)
static void sbus_iommu_table_init(struct iommu *iommu, unsigned int tsbsize)
{
unsigned long tsbbase, order, sz, num_tsb_entries;
......@@ -172,13 +163,14 @@ static void sbus_iommu_table_init(struct sbus_iommu *iommu, unsigned int tsbsize
/* Setup initial software IOMMU state. */
spin_lock_init(&iommu->lock);
iommu->page_table_map_base = MAP_BASE;
/* Allocate and initialize the free area map. */
sz = num_tsb_entries / 8;
sz = (sz + 7UL) & ~7UL;
iommu->arena.map = kzalloc(sz, GFP_KERNEL);
if (!iommu->arena.map) {
prom_printf("PCI_IOMMU: Error, kmalloc(arena.map) failed.\n");
prom_printf("SBUS_IOMMU: Error, kmalloc(arena.map) failed.\n");
prom_halt();
}
iommu->arena.limit = num_tsb_entries;
......@@ -194,7 +186,7 @@ static void sbus_iommu_table_init(struct sbus_iommu *iommu, unsigned int tsbsize
memset(iommu->page_table, 0, tsbsize);
}
static inline iopte_t *alloc_npages(struct sbus_iommu *iommu, unsigned long npages)
static inline iopte_t *alloc_npages(struct iommu *iommu, unsigned long npages)
{
long entry;
......@@ -205,14 +197,15 @@ static inline iopte_t *alloc_npages(struct sbus_iommu *iommu, unsigned long npag
return iommu->page_table + entry;
}
static inline void free_npages(struct sbus_iommu *iommu, dma_addr_t base, unsigned long npages)
static inline void free_npages(struct iommu *iommu, dma_addr_t base, unsigned long npages)
{
sbus_arena_free(&iommu->arena, base >> IO_PAGE_SHIFT, npages);
}
void *sbus_alloc_consistent(struct sbus_dev *sdev, size_t size, dma_addr_t *dvma_addr)
{
struct sbus_iommu *iommu;
struct sbus_info *info;
struct iommu *iommu;
iopte_t *iopte;
unsigned long flags, order, first_page;
void *ret;
......@@ -228,7 +221,8 @@ void *sbus_alloc_consistent(struct sbus_dev *sdev, size_t size, dma_addr_t *dvma
return NULL;
memset((char *)first_page, 0, PAGE_SIZE << order);
iommu = sdev->bus->iommu;
info = sdev->bus->iommu;
iommu = &info->iommu;
spin_lock_irqsave(&iommu->lock, flags);
iopte = alloc_npages(iommu, size >> IO_PAGE_SHIFT);
......@@ -239,7 +233,7 @@ void *sbus_alloc_consistent(struct sbus_dev *sdev, size_t size, dma_addr_t *dvma
return NULL;
}
*dvma_addr = (MAP_BASE +
*dvma_addr = (iommu->page_table_map_base +
((iopte - iommu->page_table) << IO_PAGE_SHIFT));
ret = (void *) first_page;
npages = size >> IO_PAGE_SHIFT;
......@@ -257,18 +251,20 @@ void *sbus_alloc_consistent(struct sbus_dev *sdev, size_t size, dma_addr_t *dvma
void sbus_free_consistent(struct sbus_dev *sdev, size_t size, void *cpu, dma_addr_t dvma)
{
struct sbus_iommu *iommu;
struct sbus_info *info;
struct iommu *iommu;
iopte_t *iopte;
unsigned long flags, order, npages;
npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT;
iommu = sdev->bus->iommu;
info = sdev->bus->iommu;
iommu = &info->iommu;
iopte = iommu->page_table +
((dvma - MAP_BASE) >> IO_PAGE_SHIFT);
((dvma - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
spin_lock_irqsave(&iommu->lock, flags);
free_npages(iommu, dvma - MAP_BASE, npages);
free_npages(iommu, dvma - iommu->page_table_map_base, npages);
spin_unlock_irqrestore(&iommu->lock, flags);
......@@ -279,14 +275,16 @@ void sbus_free_consistent(struct sbus_dev *sdev, size_t size, void *cpu, dma_add
dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *ptr, size_t sz, int direction)
{
struct sbus_iommu *iommu;
struct sbus_info *info;
struct iommu *iommu;
iopte_t *base;
unsigned long flags, npages, oaddr;
unsigned long i, base_paddr;
u32 bus_addr, ret;
unsigned long iopte_protection;
iommu = sdev->bus->iommu;
info = sdev->bus->iommu;
iommu = &info->iommu;
if (unlikely(direction == SBUS_DMA_NONE))
BUG();
......@@ -302,7 +300,7 @@ dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *ptr, size_t sz, int dire
if (unlikely(!base))
BUG();
bus_addr = (MAP_BASE +
bus_addr = (iommu->page_table_map_base +
((base - iommu->page_table) << IO_PAGE_SHIFT));
ret = bus_addr | (oaddr & ~IO_PAGE_MASK);
base_paddr = __pa(oaddr & IO_PAGE_MASK);
......@@ -319,7 +317,9 @@ dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *ptr, size_t sz, int dire
void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t bus_addr, size_t sz, int direction)
{
struct sbus_iommu *iommu = sdev->bus->iommu;
struct sbus_info *info = sdev->bus->iommu;
struct iommu *iommu = &info->iommu;
struct strbuf *strbuf = &info->strbuf;
iopte_t *base;
unsigned long flags, npages, i;
......@@ -329,15 +329,15 @@ void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t bus_addr, size_t sz, in
npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK);
npages >>= IO_PAGE_SHIFT;
base = iommu->page_table +
((bus_addr - MAP_BASE) >> IO_PAGE_SHIFT);
((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
bus_addr &= IO_PAGE_MASK;
spin_lock_irqsave(&iommu->lock, flags);
sbus_strbuf_flush(iommu, bus_addr, npages, direction);
sbus_strbuf_flush(iommu, strbuf, bus_addr, npages, direction);
for (i = 0; i < npages; i++)
iopte_val(base[i]) = 0UL;
free_npages(iommu, bus_addr - MAP_BASE, npages);
free_npages(iommu, bus_addr - iommu->page_table_map_base, npages);
spin_unlock_irqrestore(&iommu->lock, flags);
}
......@@ -419,7 +419,8 @@ static inline void fill_sg(iopte_t *iopte, struct scatterlist *sg,
int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems, int direction)
{
struct sbus_iommu *iommu;
struct sbus_info *info;
struct iommu *iommu;
unsigned long flags, npages, iopte_protection;
iopte_t *base;
u32 dma_base;
......@@ -436,7 +437,8 @@ int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems, i
return 1;
}
iommu = sdev->bus->iommu;
info = sdev->bus->iommu;
iommu = &info->iommu;
if (unlikely(direction == SBUS_DMA_NONE))
BUG();
......@@ -450,7 +452,7 @@ int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems, i
if (unlikely(base == NULL))
BUG();
dma_base = MAP_BASE +
dma_base = iommu->page_table_map_base +
((base - iommu->page_table) << IO_PAGE_SHIFT);
/* Normalize DVMA addresses. */
......@@ -479,7 +481,9 @@ int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems, i
void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems, int direction)
{
struct sbus_iommu *iommu;
struct sbus_info *info;
struct iommu *iommu;
struct strbuf *strbuf;
iopte_t *base;
unsigned long flags, i, npages;
u32 bus_addr;
......@@ -487,7 +491,9 @@ void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems
if (unlikely(direction == SBUS_DMA_NONE))
BUG();
iommu = sdev->bus->iommu;
info = sdev->bus->iommu;
iommu = &info->iommu;
strbuf = &info->strbuf;
bus_addr = sglist->dma_address & IO_PAGE_MASK;
......@@ -499,29 +505,33 @@ void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems
bus_addr) >> IO_PAGE_SHIFT;
base = iommu->page_table +
((bus_addr - MAP_BASE) >> IO_PAGE_SHIFT);
((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
spin_lock_irqsave(&iommu->lock, flags);
sbus_strbuf_flush(iommu, bus_addr, npages, direction);
sbus_strbuf_flush(iommu, strbuf, bus_addr, npages, direction);
for (i = 0; i < npages; i++)
iopte_val(base[i]) = 0UL;
free_npages(iommu, bus_addr - MAP_BASE, npages);
free_npages(iommu, bus_addr - iommu->page_table_map_base, npages);
spin_unlock_irqrestore(&iommu->lock, flags);
}
void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev, dma_addr_t bus_addr, size_t sz, int direction)
{
struct sbus_iommu *iommu;
struct sbus_info *info;
struct iommu *iommu;
struct strbuf *strbuf;
unsigned long flags, npages;
iommu = sdev->bus->iommu;
info = sdev->bus->iommu;
iommu = &info->iommu;
strbuf = &info->strbuf;
npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK);
npages >>= IO_PAGE_SHIFT;
bus_addr &= IO_PAGE_MASK;
spin_lock_irqsave(&iommu->lock, flags);
sbus_strbuf_flush(iommu, bus_addr, npages, direction);
sbus_strbuf_flush(iommu, strbuf, bus_addr, npages, direction);
spin_unlock_irqrestore(&iommu->lock, flags);
}
......@@ -531,11 +541,15 @@ void sbus_dma_sync_single_for_device(struct sbus_dev *sdev, dma_addr_t base, siz
void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems, int direction)
{
struct sbus_iommu *iommu;
struct sbus_info *info;
struct iommu *iommu;
struct strbuf *strbuf;
unsigned long flags, npages, i;
u32 bus_addr;
iommu = sdev->bus->iommu;
info = sdev->bus->iommu;
iommu = &info->iommu;
strbuf = &info->strbuf;
bus_addr = sglist[0].dma_address & IO_PAGE_MASK;
for (i = 0; i < nelems; i++) {
......@@ -547,7 +561,7 @@ void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev, struct scatterlist *sglist,
- bus_addr) >> IO_PAGE_SHIFT;
spin_lock_irqsave(&iommu->lock, flags);
sbus_strbuf_flush(iommu, bus_addr, npages, direction);
sbus_strbuf_flush(iommu, strbuf, bus_addr, npages, direction);
spin_unlock_irqrestore(&iommu->lock, flags);
}
......@@ -558,12 +572,13 @@ void sbus_dma_sync_sg_for_device(struct sbus_dev *sdev, struct scatterlist *sg,
/* Enable 64-bit DVMA mode for the given device. */
void sbus_set_sbus64(struct sbus_dev *sdev, int bursts)
{
struct sbus_iommu *iommu = sdev->bus->iommu;
struct sbus_info *info = sdev->bus->iommu;
struct iommu *iommu = &info->iommu;
int slot = sdev->slot;
unsigned long cfg_reg;
u64 val;
cfg_reg = iommu->sbus_control_reg;
cfg_reg = iommu->write_complete_reg;
switch (slot) {
case 0:
cfg_reg += 0x20UL;
......@@ -698,8 +713,9 @@ static unsigned long sysio_imap_to_iclr(unsigned long imap)
unsigned int sbus_build_irq(void *buscookie, unsigned int ino)
{
struct sbus_bus *sbus = (struct sbus_bus *)buscookie;
struct sbus_iommu *iommu = sbus->iommu;
unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
struct sbus_info *info = sbus->iommu;
struct iommu *iommu = &info->iommu;
unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
unsigned long imap, iclr;
int sbus_level = 0;
......@@ -760,8 +776,9 @@ unsigned int sbus_build_irq(void *buscookie, unsigned int ino)
static irqreturn_t sysio_ue_handler(int irq, void *dev_id)
{
struct sbus_bus *sbus = dev_id;
struct sbus_iommu *iommu = sbus->iommu;
unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
struct sbus_info *info = sbus->iommu;
struct iommu *iommu = &info->iommu;
unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
unsigned long afsr_reg, afar_reg;
unsigned long afsr, afar, error_bits;
int reported;
......@@ -832,8 +849,9 @@ static irqreturn_t sysio_ue_handler(int irq, void *dev_id)
static irqreturn_t sysio_ce_handler(int irq, void *dev_id)
{
struct sbus_bus *sbus = dev_id;
struct sbus_iommu *iommu = sbus->iommu;
unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
struct sbus_info *info = sbus->iommu;
struct iommu *iommu = &info->iommu;
unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
unsigned long afsr_reg, afar_reg;
unsigned long afsr, afar, error_bits;
int reported;
......@@ -909,12 +927,13 @@ static irqreturn_t sysio_ce_handler(int irq, void *dev_id)
static irqreturn_t sysio_sbus_error_handler(int irq, void *dev_id)
{
struct sbus_bus *sbus = dev_id;
struct sbus_iommu *iommu = sbus->iommu;
struct sbus_info *info = sbus->iommu;
struct iommu *iommu = &info->iommu;
unsigned long afsr_reg, afar_reg, reg_base;
unsigned long afsr, afar, error_bits;
int reported;
reg_base = iommu->sbus_control_reg - 0x2000UL;
reg_base = iommu->write_complete_reg - 0x2000UL;
afsr_reg = reg_base + SYSIO_SBUS_AFSR;
afar_reg = reg_base + SYSIO_SBUS_AFAR;
......@@ -976,8 +995,9 @@ static irqreturn_t sysio_sbus_error_handler(int irq, void *dev_id)
static void __init sysio_register_error_handlers(struct sbus_bus *sbus)
{
struct sbus_iommu *iommu = sbus->iommu;
unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
struct sbus_info *info = sbus->iommu;
struct iommu *iommu = &info->iommu;
unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
unsigned int irq;
u64 control;
......@@ -1011,9 +1031,9 @@ static void __init sysio_register_error_handlers(struct sbus_bus *sbus)
SYSIO_ECNTRL_CEEN),
reg_base + ECC_CONTROL);
control = upa_readq(iommu->sbus_control_reg);
control = upa_readq(iommu->write_complete_reg);
control |= 0x100UL; /* SBUS Error Interrupt Enable */
upa_writeq(control, iommu->sbus_control_reg);
upa_writeq(control, iommu->write_complete_reg);
}
/* Boot time initialization. */
......@@ -1021,8 +1041,10 @@ static void __init sbus_iommu_init(int __node, struct sbus_bus *sbus)
{
const struct linux_prom64_registers *pr;
struct device_node *dp;
struct sbus_iommu *iommu;
unsigned long regs;
struct sbus_info *info;
struct iommu *iommu;
struct strbuf *strbuf;
unsigned long regs, reg_base;
u64 control;
int i;
......@@ -1037,33 +1059,42 @@ static void __init sbus_iommu_init(int __node, struct sbus_bus *sbus)
}
regs = pr->phys_addr;
iommu = kmalloc(sizeof(*iommu) + SMP_CACHE_BYTES, GFP_ATOMIC);
if (iommu == NULL) {
prom_printf("sbus_iommu_init: Fatal error, kmalloc(iommu) failed\n");
info = kzalloc(sizeof(*info), GFP_ATOMIC);
if (info == NULL) {
prom_printf("sbus_iommu_init: Fatal error, "
"kmalloc(info) failed\n");
prom_halt();
}
/* Align on E$ line boundary. */
iommu = (struct sbus_iommu *)
(((unsigned long)iommu + (SMP_CACHE_BYTES - 1UL)) &
~(SMP_CACHE_BYTES - 1UL));
iommu = &info->iommu;
strbuf = &info->strbuf;
memset(iommu, 0, sizeof(*iommu));
reg_base = regs + SYSIO_IOMMUREG_BASE;
iommu->iommu_control = reg_base + IOMMU_CONTROL;
iommu->iommu_tsbbase = reg_base + IOMMU_TSBBASE;
iommu->iommu_flush = reg_base + IOMMU_FLUSH;
/* Setup spinlock. */
spin_lock_init(&iommu->lock);
reg_base = regs + SYSIO_STRBUFREG_BASE;
strbuf->strbuf_control = reg_base + STRBUF_CONTROL;
strbuf->strbuf_pflush = reg_base + STRBUF_PFLUSH;
strbuf->strbuf_fsync = reg_base + STRBUF_FSYNC;
strbuf->strbuf_enabled = 1;
/* Init register offsets. */
iommu->iommu_regs = regs + SYSIO_IOMMUREG_BASE;
iommu->strbuf_regs = regs + SYSIO_STRBUFREG_BASE;
strbuf->strbuf_flushflag = (volatile unsigned long *)
((((unsigned long)&strbuf->__flushflag_buf[0])
+ 63UL)
& ~63UL);
strbuf->strbuf_flushflag_pa = (unsigned long)
__pa(strbuf->strbuf_flushflag);
/* The SYSIO SBUS control register is used for dummy reads
* in order to ensure write completion.
*/
iommu->sbus_control_reg = regs + 0x2000UL;
iommu->write_complete_reg = regs + 0x2000UL;
/* Link into SYSIO software state. */
sbus->iommu = iommu;
sbus->iommu = info;
printk("SYSIO: UPA portID %x, at %016lx\n",
sbus->portid, regs);
......@@ -1071,40 +1102,44 @@ static void __init sbus_iommu_init(int __node, struct sbus_bus *sbus)
/* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */
sbus_iommu_table_init(iommu, IO_TSB_SIZE);
control = upa_readq(iommu->iommu_regs + IOMMU_CONTROL);
control = upa_readq(iommu->iommu_control);
control = ((7UL << 16UL) |
(0UL << 2UL) |
(1UL << 1UL) |
(1UL << 0UL));
upa_writeq(control, iommu->iommu_regs + IOMMU_CONTROL);
upa_writeq(control, iommu->iommu_control);
/* Clean out any cruft in the IOMMU using
* diagnostic accesses.
*/
for (i = 0; i < 16; i++) {
unsigned long dram = iommu->iommu_regs + IOMMU_DRAMDIAG;
unsigned long tag = iommu->iommu_regs + IOMMU_TAGDIAG;
unsigned long dram, tag;
dram = iommu->iommu_control + (IOMMU_DRAMDIAG - IOMMU_CONTROL);
tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL);
dram += (unsigned long)i * 8UL;
tag += (unsigned long)i * 8UL;
upa_writeq(0, dram);
upa_writeq(0, tag);
}
upa_readq(iommu->sbus_control_reg);
upa_readq(iommu->write_complete_reg);
/* Give the TSB to SYSIO. */
upa_writeq(__pa(iommu->page_table), iommu->iommu_regs + IOMMU_TSBBASE);
upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);
/* Setup streaming buffer, DE=1 SB_EN=1 */
control = (1UL << 1UL) | (1UL << 0UL);
upa_writeq(control, iommu->strbuf_regs + STRBUF_CONTROL);
upa_writeq(control, strbuf->strbuf_control);
/* Clear out the tags using diagnostics. */
for (i = 0; i < 16; i++) {
unsigned long ptag, ltag;
ptag = iommu->strbuf_regs + STRBUF_PTAGDIAG;
ltag = iommu->strbuf_regs + STRBUF_LTAGDIAG;
ptag = strbuf->strbuf_control +
(STRBUF_PTAGDIAG - STRBUF_CONTROL);
ltag = strbuf->strbuf_control +
(STRBUF_LTAGDIAG - STRBUF_CONTROL);
ptag += (unsigned long)i * 8UL;
ltag += (unsigned long)i * 8UL;
......@@ -1113,9 +1148,9 @@ static void __init sbus_iommu_init(int __node, struct sbus_bus *sbus)
}
/* Enable DVMA arbitration for all devices/slots. */
control = upa_readq(iommu->sbus_control_reg);
control = upa_readq(iommu->write_complete_reg);
control |= 0x3fUL;
upa_writeq(control, iommu->sbus_control_reg);
upa_writeq(control, iommu->write_complete_reg);
/* Now some Xfire specific grot... */
if (this_is_starfire)
......
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