From: Yinghai Lu current on amd k8 system with multi ht chain, the numa_node of pci devices under /sys/devices/pci0000:80/* always 0, even that chain is on node 1 or 2 or 3. workaround: pcibus_to_node(bus) is used when we want to get node that pci_device is on. In struct device, we already have numa_node member. and we could use dev_to_node() /set_dev_node() to get and set numa_node in the device. set_dev_node is called in pci_device_add() with pcibus_to_node(bus). and pcibus_to_node use bus->sysdata for nodeid. the problem is when pci_add_device is called, bus->sysdata is not assigned correct nodeid yet. the result will be numa_node always is 0. pcibios_scan_root and pci_scan_root could take sysdata. So we need to get mp_bus_to_node mapping before these two are called. and get_mp_bus_to_node could get correct node for sysdata in root bus. in scanning of root bus, all child bus will take parent bus sysdata. So all pci_device->dev.numa_node will be assigned correctly automatically. later we could use dev_to_node(&pci_dev->dev) to get numa_node, and we could also could make other bus specific device get the correct numa_node too. this is one update version to pci_sysdata ... also reverse pci_acpi_scan_root to use pcibios_scan_root again. [akpm@linux-foundation.org: warning fixes] Signed-off-by: Yinghai Lu Cc: Christoph Lameter Cc: Andy Whitcroft Cc: Jeff Garzik Cc: Andi Kleen Signed-off-by: Andrew Morton --- arch/i386/pci/Makefile | 1 arch/i386/pci/acpi.c | 40 ++++---------- arch/i386/pci/common.c | 18 +++++- arch/i386/pci/legacy.c | 4 + arch/i386/pci/mp_bus_to_node.c | 23 ++++++++ arch/x86_64/pci/k8-bus.c | 83 +++++++++++++++++++++---------- include/asm-i386/pci.h | 1 include/asm-i386/topology.h | 10 +++ include/asm-x86_64/pci.h | 1 include/asm-x86_64/topology.h | 13 ++++ 10 files changed, 134 insertions(+), 60 deletions(-) diff -puN arch/i386/pci/Makefile~x86_64-get-mp_bus_to_node-as-early-v3 arch/i386/pci/Makefile --- a/arch/i386/pci/Makefile~x86_64-get-mp_bus_to_node-as-early-v3 +++ a/arch/i386/pci/Makefile @@ -10,5 +10,6 @@ pci-y += legacy.o irq.o pci-$(CONFIG_X86_VISWS) := visws.o fixup.o pci-$(CONFIG_X86_NUMAQ) := numa.o irq.o +pci-$(CONFIG_NUMA) += mp_bus_to_node.o obj-y += $(pci-y) common.o early.o diff -puN arch/i386/pci/acpi.c~x86_64-get-mp_bus_to_node-as-early-v3 arch/i386/pci/acpi.c --- a/arch/i386/pci/acpi.c~x86_64-get-mp_bus_to_node-as-early-v3 +++ a/arch/i386/pci/acpi.c @@ -8,46 +8,28 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum) { struct pci_bus *bus; - struct pci_sysdata *sd; +#ifdef CONFIG_ACPI_NUMA int pxm; - - /* Allocate per-root-bus (not per bus) arch-specific data. - * TODO: leak; this memory is never freed. - * It's arguable whether it's worth the trouble to care. - */ - sd = kzalloc(sizeof(*sd), GFP_KERNEL); - if (!sd) { - printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum); - return NULL; - } + int node; +#endif if (domain != 0) { printk(KERN_WARNING "PCI: Multiple domains not supported\n"); - kfree(sd); return NULL; } - sd->node = -1; - - pxm = acpi_get_pxm(device->handle); #ifdef CONFIG_ACPI_NUMA - if (pxm >= 0) - sd->node = pxm_to_node(pxm); + pxm = acpi_get_pxm(device->handle); + if (pxm >= 0) { + node = pxm_to_node(pxm); + printk(KERN_INFO "bus %02x -> pxm %d -> node %02x\n", + busnum, pxm, node); + set_mp_bus_to_node(busnum, node); + } #endif - bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd); - if (!bus) - kfree(sd); + bus = pcibios_scan_root(busnum); -#ifdef CONFIG_ACPI_NUMA - if (bus != NULL) { - if (pxm >= 0) { - printk("bus %d -> pxm %d -> node %d\n", - busnum, pxm, sd->node); - } - } -#endif - return bus; } diff -puN arch/i386/pci/common.c~x86_64-get-mp_bus_to_node-as-early-v3 arch/i386/pci/common.c --- a/arch/i386/pci/common.c~x86_64-get-mp_bus_to_node-as-early-v3 +++ a/arch/i386/pci/common.c @@ -314,9 +314,14 @@ struct pci_bus * __devinit pcibios_scan_ return NULL; } + sd->node = get_mp_bus_to_node(busnum); + printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum); + bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd); + if (!bus) + kfree(sd); - return pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd); + return bus; } extern u8 pci_cache_line_size; @@ -456,7 +461,7 @@ void pcibios_disable_device (struct pci_ pcibios_disable_irq(dev); } -struct pci_bus *pci_scan_bus_with_sysdata(int busno) +struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops, int node) { struct pci_bus *bus = NULL; struct pci_sysdata *sd; @@ -471,10 +476,15 @@ struct pci_bus *pci_scan_bus_with_sysdat printk(KERN_ERR "PCI: OOM, skipping PCI bus %02x\n", busno); return NULL; } - sd->node = -1; - bus = pci_scan_bus(busno, &pci_root_ops, sd); + sd->node = node; + bus = pci_scan_bus(busno, ops, sd); if (!bus) kfree(sd); return bus; } + +struct pci_bus *pci_scan_bus_with_sysdata(int busno) +{ + return pci_scan_bus_on_node(busno, &pci_root_ops, -1); +} diff -puN arch/i386/pci/legacy.c~x86_64-get-mp_bus_to_node-as-early-v3 arch/i386/pci/legacy.c --- a/arch/i386/pci/legacy.c~x86_64-get-mp_bus_to_node-as-early-v3 +++ a/arch/i386/pci/legacy.c @@ -12,6 +12,7 @@ static void __devinit pcibios_fixup_peer_bridges(void) { int n, devfn; + long node; if (pcibios_last_bus <= 0 || pcibios_last_bus >= 0xff) return; @@ -21,12 +22,13 @@ static void __devinit pcibios_fixup_peer u32 l; if (pci_find_bus(0, n)) continue; + node = get_mp_bus_to_node(n); for (devfn = 0; devfn < 256; devfn += 8) { if (!raw_pci_ops->read(0, n, devfn, PCI_VENDOR_ID, 2, &l) && l != 0x0000 && l != 0xffff) { DBG("Found device at %02x:%02x [%04x]\n", n, devfn, l); printk(KERN_INFO "PCI: Discovered peer bus %02x\n", n); - pci_scan_bus_with_sysdata(n); + pci_scan_bus_on_node(n, &pci_root_ops, node); break; } } diff -puN /dev/null arch/i386/pci/mp_bus_to_node.c --- /dev/null +++ a/arch/i386/pci/mp_bus_to_node.c @@ -0,0 +1,23 @@ +#include +#include +#include + +#define BUS_NR 256 + +static unsigned char mp_bus_to_node[BUS_NR]; + +void set_mp_bus_to_node(int busnum, int node) +{ + if (busnum >= 0 && busnum < BUS_NR) + mp_bus_to_node[busnum] = (unsigned char) node; +} + +int get_mp_bus_to_node(int busnum) +{ + int node; + + if (busnum < 0 || busnum > (BUS_NR - 1) ) + return 0; + node = mp_bus_to_node[busnum]; + return node; +} diff -puN arch/x86_64/pci/k8-bus.c~x86_64-get-mp_bus_to_node-as-early-v3 arch/x86_64/pci/k8-bus.c --- a/arch/x86_64/pci/k8-bus.c~x86_64-get-mp_bus_to_node-as-early-v3 +++ a/arch/x86_64/pci/k8-bus.c @@ -1,7 +1,9 @@ #include #include +#include #include #include +#include /* * This discovers the pcibus <-> node mapping on AMD K8. @@ -20,64 +22,93 @@ #define SUBORDINATE_LDT_BUS_NUMBER(dword) ((dword >> 16) & 0xFF) #define PCI_DEVICE_ID_K8HTCONFIG 0x1100 +#define BUS_NR 256 + +static unsigned char mp_bus_to_node[BUS_NR]; + +void set_mp_bus_to_node(int busnum, int node) +{ + if (busnum >= 0 && busnum < BUS_NR) + mp_bus_to_node[busnum] = (unsigned char) node; +} + +int get_mp_bus_to_node(int busnum) +{ + int node; + + if (busnum < 0 || busnum > (BUS_NR - 1) ) + return 0; + + node = mp_bus_to_node[busnum]; + + /* Algorithm a bit dumb, but it shouldn't matter here. + even there is no ram installed for node0*/ + if (!node_online(node)) + node = 0; + + return node; +} + /** - * fill_mp_bus_to_cpumask() + * early_fill_mp_bus_to_node() + * called before pcibios_scan_root and pci_scan_bus * fills the mp_bus_to_cpumask array based according to the LDT Bus Number * Registers found in the K8 northbridge */ __init static int -fill_mp_bus_to_cpumask(void) +early_fill_mp_bus_to_node(void) { - struct pci_dev *nb_dev = NULL; int i, j; + unsigned slot; u32 ldtbus, nid; + u32 id; static int lbnr[3] = { LDT_BUS_NUMBER_REGISTER_0, LDT_BUS_NUMBER_REGISTER_1, LDT_BUS_NUMBER_REGISTER_2 }; - while ((nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, - PCI_DEVICE_ID_K8HTCONFIG, nb_dev))) { - pci_read_config_dword(nb_dev, NODE_ID_REGISTER, &nid); + memset(mp_bus_to_node, 0, BUS_NR); + + if (!early_pci_allowed()) + return -1; + + for (slot = 0x18; slot < 0x20; slot++) { + id = read_pci_config(0, slot, 0, PCI_VENDOR_ID); + if (id != (PCI_VENDOR_ID_AMD | (PCI_DEVICE_ID_K8HTCONFIG<<16))) + break; + nid = read_pci_config(0, slot, 0, NODE_ID_REGISTER); for (i = 0; i < NR_LDT_BUS_NUMBER_REGISTERS; i++) { - pci_read_config_dword(nb_dev, lbnr[i], &ldtbus); + ldtbus = read_pci_config(0, slot, 0, lbnr[i]); /* * if there are no busses hanging off of the current * ldt link then both the secondary and subordinate * bus number fields are set to 0. - * + * * RED-PEN * This is slightly broken because it assumes - * HT node IDs == Linux node ids, which is not always + * HT node IDs == Linux node ids, which is not always * true. However it is probably mostly true. */ if (!(SECONDARY_LDT_BUS_NUMBER(ldtbus) == 0 && SUBORDINATE_LDT_BUS_NUMBER(ldtbus) == 0)) { for (j = SECONDARY_LDT_BUS_NUMBER(ldtbus); j <= SUBORDINATE_LDT_BUS_NUMBER(ldtbus); - j++) { - struct pci_bus *bus; - struct pci_sysdata *sd; - - long node = NODE_ID(nid); - /* Algorithm a bit dumb, but - it shouldn't matter here */ - bus = pci_find_bus(0, j); - if (!bus) - continue; - if (!node_online(node)) - node = 0; - - sd = bus->sysdata; - sd->node = node; - } + j++) { + int node = NODE_ID(nid); + mp_bus_to_node[j] = (unsigned char)node; + } } } } + for (i = 0; i < BUS_NR; i++) { + int node = mp_bus_to_node[i]; + if (node) + printk(KERN_DEBUG "bus: %02x to node: %02x\n", i, node); + } return 0; } -fs_initcall(fill_mp_bus_to_cpumask); +postcore_initcall(early_fill_mp_bus_to_node); diff -puN include/asm-i386/pci.h~x86_64-get-mp_bus_to_node-as-early-v3 include/asm-i386/pci.h --- a/include/asm-i386/pci.h~x86_64-get-mp_bus_to_node-as-early-v3 +++ a/include/asm-i386/pci.h @@ -9,6 +9,7 @@ struct pci_sysdata { }; /* scan a bus after allocating a pci_sysdata for it */ +extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops, int node); extern struct pci_bus *pci_scan_bus_with_sysdata(int busno); #include /* for struct page */ diff -puN include/asm-i386/topology.h~x86_64-get-mp_bus_to_node-as-early-v3 include/asm-i386/topology.h --- a/include/asm-i386/topology.h~x86_64-get-mp_bus_to_node-as-early-v3 +++ a/include/asm-i386/topology.h @@ -101,7 +101,17 @@ extern unsigned long node_remap_size[]; #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid]) +int get_mp_bus_to_node(int busnum); +void set_mp_bus_to_node(int busnum, int node); + #else /* !CONFIG_NUMA */ +static inline int get_mp_bus_to_node(int busnum) +{ + return 0; +} +static inline void set_mp_bus_to_node(int busnum, int node) +{ +} /* * Other i386 platforms should define their own version of the * above macros here. diff -puN include/asm-x86_64/pci.h~x86_64-get-mp_bus_to_node-as-early-v3 include/asm-x86_64/pci.h --- a/include/asm-x86_64/pci.h~x86_64-get-mp_bus_to_node-as-early-v3 +++ a/include/asm-x86_64/pci.h @@ -10,6 +10,7 @@ struct pci_sysdata { void* iommu; /* IOMMU private data */ }; +extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops, int node); extern struct pci_bus *pci_scan_bus_with_sysdata(int busno); #ifdef CONFIG_CALGARY_IOMMU diff -puN include/asm-x86_64/topology.h~x86_64-get-mp_bus_to_node-as-early-v3 include/asm-x86_64/topology.h --- a/include/asm-x86_64/topology.h~x86_64-get-mp_bus_to_node-as-early-v3 +++ a/include/asm-x86_64/topology.h @@ -53,6 +53,19 @@ extern int __node_distance(int, int); .nr_balance_failed = 0, \ } +int get_mp_bus_to_node(int busnum); +void set_mp_bus_to_node(int busnum, int node); + +#else + +static inline int get_mp_bus_to_node(int busnum) +{ + return 0; +} +static inline void set_mp_bus_to_node(int busnum, int node) +{ +} + #endif #ifdef CONFIG_SMP _