AMD fam10: Fix add_more_links
One PCI function may contain upto 4 links, further links must be added to PCI function 4 on the same device. There is no requirement that in dev->link_list the last element would have the highest link->link_num. Also fix off-by-one error when allocating for more links. Change-Id: If7ebdd1ad52653d3757b5930bd0a83e2cf2fcac6 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/8555 Tested-by: build bot (Jenkins) Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
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@ -176,18 +176,8 @@ static u32 amdfam10_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool
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#endif
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u32 max_devfn;
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if (link->link_num > 3) {
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u32 regpos;
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u32 reg;
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regpos = 0x170 + 4 * (link->link_num & 3); // it is only on sublink0
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reg = pci_read_config32(dev, regpos);
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if(reg & 1) return max; // already ganged no sblink1
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dev = get_node_pci(nodeid, 4);
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}
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/* Check for connected link. */
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link->cap = 0x80 + ((link->link_num & 3) * 0x20);
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link->cap = 0x80 + (link->link_num * 0x20);
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if (!is_non_coherent_link(dev, link))
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return max;
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@ -1178,14 +1168,16 @@ static void sysconf_init(device_t dev) // first node
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static void add_more_links(device_t dev, unsigned total_links)
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{
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struct bus *link, *last = NULL;
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int link_num;
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int link_num = -1;
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for (link = dev->link_list; link; link = link->next)
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for (link = dev->link_list; link; link = link->next) {
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if (link_num < link->link_num)
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link_num = link->link_num;
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last = link;
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}
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if (last) {
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int links = total_links - last->link_num;
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link_num = last->link_num;
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int links = total_links - (link_num + 1);
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if (links > 0) {
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link = malloc(links*sizeof(*link));
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if (!link)
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@ -1195,7 +1187,6 @@ static void add_more_links(device_t dev, unsigned total_links)
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}
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}
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else {
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link_num = -1;
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link = malloc(total_links*sizeof(*link));
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memset(link, 0, total_links*sizeof(*link));
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dev->link_list = link;
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@ -1337,15 +1328,19 @@ static void cpu_bus_scan(device_t dev)
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cdb_dev = pci_probe_dev(NULL, pbus,
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PCI_DEVFN(devn, fn));
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}
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cdb_dev = dev_find_slot(busn, PCI_DEVFN(devn, 0));
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}
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if (cdb_dev) {
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/* Ok, We need to set the links for that device.
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* otherwise the device under it will not be scanned
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*/
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add_more_links(cdb_dev, 8);
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}
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/* Ok, We need to set the links for that device.
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* otherwise the device under it will not be scanned
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*/
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cdb_dev = dev_find_slot(busn, PCI_DEVFN(devn, 0));
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if (cdb_dev)
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add_more_links(cdb_dev, 4);
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cdb_dev = dev_find_slot(busn, PCI_DEVFN(devn, 4));
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if (cdb_dev)
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add_more_links(cdb_dev, 4);
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cores_found = 0; // one core
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cdb_dev = dev_find_slot(busn, PCI_DEVFN(devn, 3));
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int enable_node = cdb_dev && cdb_dev->enabled;
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