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Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

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* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Fix boot failure on POWER6
  [POWERPC] Workaround for iommu page alignment
This commit is contained in:
Linus Torvalds 2008-01-15 08:01:48 -08:00
commit f885b51967
4 changed files with 16 additions and 13 deletions
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17
arch/powerpc/kernel/iommu.c
View File

@ -278,6 +278,7 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
unsigned long flags;
struct scatterlist *s, *outs, *segstart;
int outcount, incount, i;
unsigned int align;
unsigned long handle;
BUG_ON(direction == DMA_NONE);
@ -309,7 +310,12 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
/* Allocate iommu entries for that segment */
vaddr = (unsigned long) sg_virt(s);
npages = iommu_num_pages(vaddr, slen);
entry = iommu_range_alloc(tbl, npages, &handle, mask >> IOMMU_PAGE_SHIFT, 0);
align = 0;
if (IOMMU_PAGE_SHIFT < PAGE_SHIFT && slen >= PAGE_SIZE &&
(vaddr & ~PAGE_MASK) == 0)
align = PAGE_SHIFT - IOMMU_PAGE_SHIFT;
entry = iommu_range_alloc(tbl, npages, &handle,
mask >> IOMMU_PAGE_SHIFT, align);
DBG(" - vaddr: %lx, size: %lx\n", vaddr, slen);
@ -572,7 +578,7 @@ dma_addr_t iommu_map_single(struct iommu_table *tbl, void *vaddr,
{
dma_addr_t dma_handle = DMA_ERROR_CODE;
unsigned long uaddr;
unsigned int npages;
unsigned int npages, align;
BUG_ON(direction == DMA_NONE);
@ -580,8 +586,13 @@ dma_addr_t iommu_map_single(struct iommu_table *tbl, void *vaddr,
npages = iommu_num_pages(uaddr, size);
if (tbl) {
align = 0;
if (IOMMU_PAGE_SHIFT < PAGE_SHIFT && size >= PAGE_SIZE &&
((unsigned long)vaddr & ~PAGE_MASK) == 0)
align = PAGE_SHIFT - IOMMU_PAGE_SHIFT;
dma_handle = iommu_alloc(tbl, vaddr, npages, direction,
mask >> IOMMU_PAGE_SHIFT, 0);
mask >> IOMMU_PAGE_SHIFT, align);
if (dma_handle == DMA_ERROR_CODE) {
if (printk_ratelimit()) {
printk(KERN_INFO "iommu_alloc failed, "

10
arch/powerpc/mm/slb.c
View File

@ -82,14 +82,6 @@ static inline void slb_shadow_clear(unsigned long entry)
get_slb_shadow()->save_area[entry].esid = 0;
}
void slb_shadow_clear_all(void)
{
int i;
for (i = 0; i < SLB_NUM_BOLTED; i++)
slb_shadow_clear(i);
}
static inline void create_shadowed_slbe(unsigned long ea, int ssize,
unsigned long flags,
unsigned long entry)
@ -300,6 +292,8 @@ void slb_initialize(void)
create_shadowed_slbe(VMALLOC_START, mmu_kernel_ssize, vflags, 1);
slb_shadow_clear(2);
/* We don't bolt the stack for the time being - we're in boot,
* so the stack is in the bolted segment. By the time it goes
* elsewhere, we'll call _switch() which will bolt in the new

1
arch/powerpc/platforms/pseries/lpar.c
View File

@ -272,7 +272,6 @@ void vpa_init(int cpu)
*/
addr = __pa(&slb_shadow[cpu]);
if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
slb_shadow_clear_all();
ret = register_slb_shadow(hwcpu, addr);
if (ret)
printk(KERN_ERR

1
include/asm-powerpc/mmu-hash64.h
View File

@ -286,7 +286,6 @@ extern void hpte_init_iSeries(void);
extern void hpte_init_beat(void);
extern void hpte_init_beat_v3(void);
extern void slb_shadow_clear_all(void);
extern void stabs_alloc(void);
extern void slb_initialize(void);
extern void slb_flush_and_rebolt(void);