unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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[SPARC64] PCI: Size TSB correctly on SUN4V.

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Forgot to multiply by 8 * 1024, oops.  Correct the size constant when
the virtual-dma arena is 2GB in size, it should bet 256 not 128.

Finally, log some info about the TSB at probe time.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2006-02-15 22:25:27 -08:00
parent db33f9bc09
commit e7a0453ef8
1 changed files with 16 additions and 6 deletions
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22
arch/sparc64/kernel/pci_sun4v.c
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@ -102,6 +102,7 @@ static void *pci_4v_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr
first_page = __get_free_pages(GFP_ATOMIC, order);
if (first_page == 0UL)
return NULL;
memset((char *)first_page, 0, PAGE_SIZE << order);
pcp = pdev->sysdata;
@ -805,11 +806,11 @@ static void pbm_register_toplevel_resources(struct pci_controller_info *p,
&pbm->mem_space);
}
static void probe_existing_entries(struct pci_pbm_info *pbm,
struct pci_iommu *iommu)
static unsigned long probe_existing_entries(struct pci_pbm_info *pbm,
struct pci_iommu *iommu)
{
struct pci_iommu_arena *arena = &iommu->arena;
unsigned long i;
unsigned long i, cnt = 0;
u32 devhandle;
devhandle = pbm->devhandle;
@ -819,9 +820,13 @@ static void probe_existing_entries(struct pci_pbm_info *pbm,
ret = pci_sun4v_iommu_getmap(devhandle,
HV_PCI_TSBID(0, i),
&io_attrs, &ra);
if (ret == HV_EOK)
if (ret == HV_EOK) {
cnt++;
__set_bit(i, arena->map);
}
}
return cnt;
}
static void pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
@ -853,7 +858,7 @@ static void pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
case 0x80000000:
dma_mask |= 0x7fffffff;
tsbsize = 128;
tsbsize = 256;
break;
default:
@ -861,6 +866,8 @@ static void pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
prom_halt();
};
tsbsize *= (8 * 1024);
num_tsb_entries = tsbsize / sizeof(iopte_t);
dma_offset = vdma[0];
@ -882,7 +889,10 @@ static void pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
memset(iommu->arena.map, 0, sz);
iommu->arena.limit = num_tsb_entries;
probe_existing_entries(pbm, iommu);
sz = probe_existing_entries(pbm, iommu);
printk("%s: TSB entries [%lu], existing mapings [%lu]\n",
pbm->name, num_tsb_entries, sz);
}
static void pci_sun4v_get_bus_range(struct pci_pbm_info *pbm)