parisc: Fix up devices below a PCI-PCI MegaRAID controller bridge
A MegaRAID PCI card in my rp5470 acts as PCI-PCI bridge. Resource allocation for PCI devices behind such a bridge is quite incomplete, so that syslog reports those warnings: LBA 0:10: PCI host bridge to bus 0000:50 pci_bus 0000:50: root bus resource [io 0x80000-0x8ffff] (bus address [0x0000-0xffff]) pci_bus 0000:50: root bus resource [mem 0xffffffff94000000-0xffffffff95ffffff] (bus address [0x94000000-0x95ffffff]) pci_bus 0000:50: root bus resource [bus 50-57] pci 0000:50:00.0: [8086:0964] type 01 class 0x060400 pci 0000:50:00.1: [8086:1960] type 00 class 0x0e0001 pci 0000:50:00.1: reg 0x10: [mem 0x00000000-0x003fffff pref] pci 0000:50:00.1: reg 0x30: [mem 0x00000000-0x00007fff pref] pci 0000:50:00.0: Changing bridge control from 0x00000000 to 0x00000023 pci_bus 0000:51: busn_res: can not insert [bus 51-ff] under [bus 50-57] (conflicts with (null) [bus 50-57]) pci 0000:50:00.0: PCI bridge to [bus 51-ff] pci 0000:50:00.0: bridge window [io 0x80000-0x80fff] pci 0000:50:00.0: bridge window [mem 0x00000000-0x000fffff] pci 0000:50:00.0: bridge window [mem 0x00000000-0x000fffff pref] pci 0000:50:00.0: can't claim BAR 14 [mem 0x00000000-0x000fffff]: no compatible bridge window pci 0000:50:00.0: can't claim BAR 15 [mem 0x00000000-0x000fffff pref]: no compatible bridge window pci 0000:50:00.0: can't claim BAR 16 [??? 0x00000000 flags 0x0]: no compatible bridge window pci_bus 0000:51: busn_res: [bus 51-ff] end is updated to 51 pci 0000:50:00.0: BAR 16: [??? 0x00000000 flags 0x20000000] has bogus alignment pci 0000:50:00.1: BAR 0: assigned [mem 0xffffffff94000000-0xffffffff943fffff pref] pci 0000:50:00.0: BAR 14: assigned [mem 0xffffffff94400000-0xffffffff944fffff] pci 0000:50:00.0: BAR 15: assigned [mem 0xffffffff94500000-0xffffffff945fffff pref] pci 0000:50:00.1: BAR 6: assigned [mem 0xffffffff94600000-0xffffffff94607fff pref] pci 0000:50:00.0: PCI bridge to [bus 51] pci 0000:50:00.0: bridge window [io 0x80000-0x80fff] pci 0000:50:00.0: bridge window [mem 0xffffffff94400000-0xffffffff944fffff] pci 0000:50:00.0: bridge window [mem 0xffffffff94500000-0xffffffff945fffff pref] The patch below tries to improve the resource allocation. Output is now: LBA 0:10: PCI host bridge to bus 0000:50 pci_bus 0000:50: root bus resource [io 0x80000-0x8ffff] (bus address [0x0000-0xffff]) pci_bus 0000:50: root bus resource [mem 0xffffffff94000000-0xffffffff95ffffff] (bus address [0x94000000-0x95ffffff]) pci_bus 0000:50: root bus resource [bus 50-57] pci 0000:50:00.0: Changing bridge control from 0x00000000 to 0x00000023 pci 0000:50:00.0: PCI bridge to [bus 51-ff] pci 0000:50:00.1: BAR 0: assigned [mem 0xffffffff94000000-0xffffffff943fffff pref] pci 0000:50:00.1: BAR 6: assigned [mem 0xffffffff94400000-0xffffffff94407fff pref] pci 0000:50:00.0: PCI bridge to [bus 51] pci 0000:50:00.0: bridge window [io 0x80000-0x80fff] Signed-off-by: Helge Deller <deller@gmx.de>
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@ -667,6 +667,42 @@ extend_lmmio_len(unsigned long start, unsigned long end, unsigned long lba_len)
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#define truncate_pat_collision(r,n) (0)
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#define truncate_pat_collision(r,n) (0)
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#endif
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#endif
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static void pcibios_allocate_bridge_resources(struct pci_dev *dev)
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{
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int idx;
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struct resource *r;
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for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) {
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r = &dev->resource[idx];
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if (!r->flags)
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continue;
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if (r->parent) /* Already allocated */
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continue;
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if (!r->start || pci_claim_bridge_resource(dev, idx) < 0) {
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/*
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* Something is wrong with the region.
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* Invalidate the resource to prevent
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* child resource allocations in this
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* range.
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*/
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r->start = r->end = 0;
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r->flags = 0;
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}
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}
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}
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static void pcibios_allocate_bus_resources(struct pci_bus *bus)
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{
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struct pci_bus *child;
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/* Depth-First Search on bus tree */
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if (bus->self)
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pcibios_allocate_bridge_resources(bus->self);
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list_for_each_entry(child, &bus->children, node)
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pcibios_allocate_bus_resources(child);
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}
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/*
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/*
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** The algorithm is generic code.
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** The algorithm is generic code.
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** But it needs to access local data structures to get the IRQ base.
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** But it needs to access local data structures to get the IRQ base.
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@ -693,11 +729,11 @@ lba_fixup_bus(struct pci_bus *bus)
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** pci_alloc_primary_bus() mangles this.
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** pci_alloc_primary_bus() mangles this.
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*/
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*/
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if (bus->parent) {
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if (bus->parent) {
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int i;
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/* PCI-PCI Bridge */
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/* PCI-PCI Bridge */
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pci_read_bridge_bases(bus);
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pci_read_bridge_bases(bus);
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for (i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++)
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pci_claim_bridge_resource(bus->self, i);
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/* check and allocate bridge resources */
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pcibios_allocate_bus_resources(bus);
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} else {
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} else {
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/* Host-PCI Bridge */
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/* Host-PCI Bridge */
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int err;
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int err;
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