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Subjectalpha pci fixes (test12-pre7)
This should fix at least some of the boot problems reported recently.

- boot failure on Miata with >1Gb of memory, fixed by Jay Estabrook.
Address written to the Translated Base Registers of CIA/Pyxis
must be shifted by 2.

- fix oops on DP264 caused by Cypress quirk. We cannot call
pci_claim_resource() from the quirk code, otherwise on multi-hose
machines hose resources would appear to be a sibling, not parent for
the resource we want to claim - pcibios_fixup_bus() is called _after_
quirks fixup, thus pci_claim_resource() will always fail.
Fortunately, another quite simple fix is possible - just disable
resources for standard IDE ports, and generic IDE code will assume
legacy addresses.

- off by one check in pci_dma_supported().

- proper calculation of the address space size for 64-bit PCI cards.

- start resource allocation on the root bus from PCIBIOS_MIN_[IO,MEM],
not from 0. Otherwise if there is a bridge on the root bus, but no I/O
or memory, the bridge's bases would be set too low. This doesn't matter
in the I/O case since devices behind the bridge are allocated properly
anyway, but could be harmful for memory case - the bridge will block
transfers to the ISA sg window from secondary bus.

- sanity check in pci_dma_supported() for bogus regions.

Ivan.

diff -urp 2.4.0t12p7/arch/alpha/kernel/core_cia.c linux/arch/alpha/kernel/core_cia.c
--- 2.4.0t12p7/arch/alpha/kernel/core_cia.c Wed Dec 6 15:00:54 2000
+++ linux/arch/alpha/kernel/core_cia.c Thu Dec 7 13:18:33 2000
@@ -700,11 +700,11 @@ do_init_arch(int is_pyxis)

*(vip)CIA_IOC_PCI_W1_BASE = 0x40000000 | 1;
*(vip)CIA_IOC_PCI_W1_MASK = (0x40000000 - 1) & 0xfff00000;
- *(vip)CIA_IOC_PCI_T1_BASE = 0;
+ *(vip)CIA_IOC_PCI_T1_BASE = 0 >> 2;

*(vip)CIA_IOC_PCI_W2_BASE = 0x80000000 | 1;
*(vip)CIA_IOC_PCI_W2_MASK = (0x40000000 - 1) & 0xfff00000;
- *(vip)CIA_IOC_PCI_T2_BASE = 0x40000000;
+ *(vip)CIA_IOC_PCI_T2_BASE = 0x40000000 >> 2;

*(vip)CIA_IOC_PCI_W3_BASE = 0;
}
diff -urp 2.4.0t12p7/arch/alpha/kernel/pci.c linux/arch/alpha/kernel/pci.c
--- 2.4.0t12p7/arch/alpha/kernel/pci.c Wed Dec 6 15:00:54 2000
+++ linux/arch/alpha/kernel/pci.c Thu Dec 7 13:16:44 2000
@@ -90,10 +90,8 @@ quirk_cypress_ide_ports(struct pci_dev *
{
if (dev->class >> 8 != PCI_CLASS_STORAGE_IDE)
return;
- dev->resource[1].start |= 2;
- dev->resource[1].end = dev->resource[1].start;
- pci_claim_resource(dev, 0);
- pci_claim_resource(dev, 1);
+ dev->resource[0].flags = 0;
+ dev->resource[1].flags = 0;
}

static void __init
diff -urp 2.4.0t12p7/arch/alpha/kernel/pci_iommu.c linux/arch/alpha/kernel/pci_iommu.c
--- 2.4.0t12p7/arch/alpha/kernel/pci_iommu.c Sat Sep 23 01:07:43 2000
+++ linux/arch/alpha/kernel/pci_iommu.c Thu Dec 7 13:17:36 2000
@@ -613,10 +613,10 @@ pci_dma_supported(struct pci_dev *pdev,
/* Check that we have a scatter-gather arena that fits. */
hose = pdev ? pdev->sysdata : pci_isa_hose;
arena = hose->sg_isa;
- if (arena && arena->dma_base + arena->size <= mask)
+ if (arena && arena->dma_base + arena->size - 1 <= mask)
return 1;
arena = hose->sg_pci;
- if (arena && arena->dma_base + arena->size <= mask)
+ if (arena && arena->dma_base + arena->size - 1 <= mask)
return 1;

return 0;
diff -urp 2.4.0t12p7/drivers/pci/pci.c linux/drivers/pci/pci.c
--- 2.4.0t12p7/drivers/pci/pci.c Wed Dec 6 15:00:57 2000
+++ linux/drivers/pci/pci.c Thu Dec 7 14:46:49 2000
@@ -575,8 +575,9 @@ static void pci_read_bases(struct pci_de
pci_write_config_dword(dev, reg+4, ~0);
pci_read_config_dword(dev, reg+4, &sz);
pci_write_config_dword(dev, reg+4, l);
- if (sz)
- res->end = res->start + (((unsigned long) ~sz) << 32);
+ if (~sz)
+ res->end = res->start + 0xffffffff +
+ (((unsigned long) ~sz) << 32);
#else
if (l) {
printk(KERN_ERR "PCI: Unable to handle 64-bit address for device %s\n", dev->slot_name);
diff -urp 2.4.0t12p7/drivers/pci/setup-bus.c linux/drivers/pci/setup-bus.c
--- 2.4.0t12p7/drivers/pci/setup-bus.c Wed Dec 6 15:00:57 2000
+++ linux/drivers/pci/setup-bus.c Thu Dec 7 13:21:24 2000
@@ -205,7 +205,7 @@ pbus_assign_resources(struct pci_bus *bu
}
}

-void __init
+void __init
pci_assign_unassigned_resources(void)
{
struct pbus_set_ranges_data ranges;
@@ -215,8 +215,8 @@ pci_assign_unassigned_resources(void)
for(ln=pci_root_buses.next; ln != &pci_root_buses; ln=ln->next) {
struct pci_bus *b = pci_bus_b(ln);

- ranges.io_start = b->resource[0]->start;
- ranges.mem_start = b->resource[1]->start;
+ ranges.io_start = b->resource[0]->start + PCIBIOS_MIN_IO;
+ ranges.mem_start = b->resource[1]->start + PCIBIOS_MIN_MEM;
ranges.io_end = ranges.io_start;
ranges.mem_end = ranges.mem_start;
ranges.found_vga = 0;
diff -urp 2.4.0t12p7/drivers/pci/setup-res.c linux/drivers/pci/setup-res.c
--- 2.4.0t12p7/drivers/pci/setup-res.c Wed Dec 6 15:00:57 2000
+++ linux/drivers/pci/setup-res.c Thu Dec 7 14:05:20 2000
@@ -136,6 +136,7 @@ pdev_sort_resources(struct pci_dev *dev,
for (i = 0; i < PCI_NUM_RESOURCES; i++) {
struct resource *r;
struct resource_list *list, *tmp;
+ unsigned long r_size;

/* PCI-PCI bridges may have I/O ports or
memory on the primary bus */
@@ -144,15 +145,23 @@ pdev_sort_resources(struct pci_dev *dev,
continue;

r = &dev->resource[i];
+ r_size = r->end - r->start;
+
if (!(r->flags & type_mask) || r->parent)
continue;
+ if (!r_size) {
+ printk(KERN_WARN "PCI: Ignore bogus resource %d "
+ "[%lx:%lx] of %s\n",
+ i, r->start, r->end, dev->name);
+ continue;
+ }
for (list = head; ; list = list->next) {
unsigned long size = 0;
struct resource_list *ln = list->next;

if (ln)
size = ln->res->end - ln->res->start;
- if (r->end - r->start > size) {
+ if (r_size > size) {
tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
tmp->next = ln;
tmp->res = r;
-
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