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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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x86/PCI: dynamically allocate pci_root_info for native host bridge drivers
This dynamically allocates struct pci_root_info instead of using a static array. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yinghai Lu
Bjorn Helgaas
parent
35cb05e5bd
commit
d28e5ac2a0
@ -32,6 +32,18 @@ static struct pci_hostbridge_probe pci_probes[] __initdata = {
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#define RANGE_NUM 16
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static struct pci_root_info __init *find_pci_root_info(int node, int link)
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{
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struct pci_root_info *info;
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/* find the position */
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list_for_each_entry(info, &pci_root_infos, list)
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if (info->node == node && info->link == link)
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return info;
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return NULL;
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}
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/**
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* early_fill_mp_bus_to_node()
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* called before pcibios_scan_root and pci_scan_bus
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@ -50,7 +62,6 @@ static int __init early_fill_mp_bus_info(void)
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int def_link;
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struct pci_root_info *info;
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u32 reg;
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struct resource *res;
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u64 start;
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u64 end;
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struct range range[RANGE_NUM];
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@ -86,7 +97,6 @@ static int __init early_fill_mp_bus_info(void)
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if (!found)
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return 0;
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pci_root_num = 0;
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for (i = 0; i < 4; i++) {
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int min_bus;
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int max_bus;
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@ -105,13 +115,8 @@ static int __init early_fill_mp_bus_info(void)
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#endif
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link = (reg >> 8) & 0x03;
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info = &pci_root_info[pci_root_num];
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info->bus_min = min_bus;
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info->bus_max = max_bus;
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info->node = node;
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info->link = link;
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info = alloc_pci_root_info(min_bus, max_bus, node, link);
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sprintf(info->name, "PCI Bus #%02x", min_bus);
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pci_root_num++;
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}
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/* get the default node and link for left over res */
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@ -134,16 +139,10 @@ static int __init early_fill_mp_bus_info(void)
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link = (reg >> 4) & 0x03;
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end = (reg & 0xfff000) | 0xfff;
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/* find the position */
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for (j = 0; j < pci_root_num; j++) {
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info = &pci_root_info[j];
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if (info->node == node && info->link == link)
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break;
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}
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if (j == pci_root_num)
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info = find_pci_root_info(node, link);
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if (!info)
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continue; /* not found */
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info = &pci_root_info[j];
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printk(KERN_DEBUG "node %d link %d: io port [%llx, %llx]\n",
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node, link, start, end);
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@ -155,13 +154,8 @@ static int __init early_fill_mp_bus_info(void)
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}
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/* add left over io port range to def node/link, [0, 0xffff] */
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/* find the position */
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for (j = 0; j < pci_root_num; j++) {
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info = &pci_root_info[j];
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if (info->node == def_node && info->link == def_link)
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break;
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}
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if (j < pci_root_num) {
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info = &pci_root_info[j];
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info = find_pci_root_info(def_node, def_link);
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if (info) {
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for (i = 0; i < RANGE_NUM; i++) {
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if (!range[i].end)
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continue;
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@ -214,16 +208,10 @@ static int __init early_fill_mp_bus_info(void)
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end <<= 8;
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end |= 0xffff;
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/* find the position */
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for (j = 0; j < pci_root_num; j++) {
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info = &pci_root_info[j];
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if (info->node == node && info->link == link)
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break;
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}
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if (j == pci_root_num)
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continue; /* not found */
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info = find_pci_root_info(node, link);
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info = &pci_root_info[j];
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if (!info)
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continue;
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printk(KERN_DEBUG "node %d link %d: mmio [%llx, %llx]",
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node, link, start, end);
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@ -291,14 +279,8 @@ static int __init early_fill_mp_bus_info(void)
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* add left over mmio range to def node/link ?
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* that is tricky, just record range in from start_min to 4G
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*/
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for (j = 0; j < pci_root_num; j++) {
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info = &pci_root_info[j];
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if (info->node == def_node && info->link == def_link)
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break;
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}
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if (j < pci_root_num) {
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info = &pci_root_info[j];
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info = find_pci_root_info(def_node, def_link);
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if (info) {
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for (i = 0; i < RANGE_NUM; i++) {
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if (!range[i].end)
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continue;
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@ -309,20 +291,16 @@ static int __init early_fill_mp_bus_info(void)
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}
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}
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for (i = 0; i < pci_root_num; i++) {
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int res_num;
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list_for_each_entry(info, &pci_root_infos, list) {
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int busnum;
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struct pci_root_res *root_res;
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info = &pci_root_info[i];
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res_num = info->res_num;
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busnum = info->bus_min;
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printk(KERN_DEBUG "bus: [%02x, %02x] on node %x link %x\n",
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info->bus_min, info->bus_max, info->node, info->link);
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for (j = 0; j < res_num; j++) {
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res = &info->res[j];
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printk(KERN_DEBUG "bus: %02x index %x %pR\n",
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busnum, j, res);
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}
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list_for_each_entry(root_res, &info->resources, list)
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printk(KERN_DEBUG "bus: %02x %pR\n",
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busnum, &root_res->res);
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}
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return 0;
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@ -22,19 +22,15 @@
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static void __init cnb20le_res(u8 bus, u8 slot, u8 func)
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{
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struct pci_root_info *info;
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struct pci_root_res *root_res;
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struct resource res;
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u16 word1, word2;
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u8 fbus, lbus;
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int i;
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info = &pci_root_info[pci_root_num];
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pci_root_num++;
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/* read the PCI bus numbers */
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fbus = read_pci_config_byte(bus, slot, func, 0x44);
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lbus = read_pci_config_byte(bus, slot, func, 0x45);
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info->bus_min = fbus;
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info->bus_max = lbus;
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info = alloc_pci_root_info(fbus, lbus, 0, 0);
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/*
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* Add the legacy IDE ports on bus 0
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@ -86,8 +82,8 @@ static void __init cnb20le_res(u8 bus, u8 slot, u8 func)
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res.flags = IORESOURCE_BUS;
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printk(KERN_INFO "CNB20LE PCI Host Bridge (domain 0000 %pR)\n", &res);
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for (i = 0; i < info->res_num; i++)
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printk(KERN_INFO "host bridge window %pR\n", &info->res[i]);
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list_for_each_entry(root_res, &info->resources, list)
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printk(KERN_INFO "host bridge window %pR\n", &root_res->res);
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}
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static int __init broadcom_postcore_init(void)
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@ -4,35 +4,38 @@
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#include "bus_numa.h"
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int pci_root_num;
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struct pci_root_info pci_root_info[PCI_ROOT_NR];
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LIST_HEAD(pci_root_infos);
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static struct pci_root_info *x86_find_pci_root_info(int bus)
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{
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struct pci_root_info *info;
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if (list_empty(&pci_root_infos))
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return NULL;
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list_for_each_entry(info, &pci_root_infos, list)
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if (info->bus_min == bus)
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return info;
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return NULL;
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}
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void x86_pci_root_bus_resources(int bus, struct list_head *resources)
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{
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int i;
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int j;
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struct pci_root_info *info;
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struct pci_root_info *info = x86_find_pci_root_info(bus);
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struct pci_root_res *root_res;
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if (!pci_root_num)
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goto default_resources;
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for (i = 0; i < pci_root_num; i++) {
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if (pci_root_info[i].bus_min == bus)
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break;
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}
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if (i == pci_root_num)
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if (!info)
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goto default_resources;
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printk(KERN_DEBUG "PCI: root bus %02x: hardware-probed resources\n",
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bus);
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info = &pci_root_info[i];
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for (j = 0; j < info->res_num; j++) {
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list_for_each_entry(root_res, &info->resources, list) {
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struct resource *res;
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struct resource *root;
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res = &info->res[j];
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res = &root_res->res;
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pci_add_resource(resources, res);
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if (res->flags & IORESOURCE_IO)
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root = &ioport_resource;
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@ -53,11 +56,32 @@ void x86_pci_root_bus_resources(int bus, struct list_head *resources)
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pci_add_resource(resources, &iomem_resource);
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}
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struct pci_root_info __init *alloc_pci_root_info(int bus_min, int bus_max,
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int node, int link)
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{
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struct pci_root_info *info;
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info = kzalloc(sizeof(*info), GFP_KERNEL);
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if (!info)
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return info;
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INIT_LIST_HEAD(&info->resources);
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info->bus_min = bus_min;
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info->bus_max = bus_max;
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info->node = node;
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info->link = link;
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list_add_tail(&info->list, &pci_root_infos);
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return info;
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}
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void __devinit update_res(struct pci_root_info *info, resource_size_t start,
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resource_size_t end, unsigned long flags, int merge)
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{
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int i;
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struct resource *res;
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struct pci_root_res *root_res;
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if (start > end)
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return;
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@ -69,11 +93,11 @@ void __devinit update_res(struct pci_root_info *info, resource_size_t start,
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goto addit;
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/* try to merge it with old one */
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for (i = 0; i < info->res_num; i++) {
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list_for_each_entry(root_res, &info->resources, list) {
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resource_size_t final_start, final_end;
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resource_size_t common_start, common_end;
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res = &info->res[i];
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res = &root_res->res;
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if (res->flags != flags)
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continue;
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@ -93,14 +117,15 @@ void __devinit update_res(struct pci_root_info *info, resource_size_t start,
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addit:
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/* need to add that */
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if (info->res_num >= RES_NUM)
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root_res = kzalloc(sizeof(*root_res), GFP_KERNEL);
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if (!root_res)
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return;
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res = &info->res[info->res_num];
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res = &root_res->res;
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res->name = info->name;
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res->flags = flags;
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res->start = start;
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res->end = end;
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res->child = NULL;
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info->res_num++;
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list_add_tail(&root_res->list, &info->resources);
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}
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@ -4,22 +4,24 @@
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* sub bus (transparent) will use entres from 3 to store extra from
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* root, so need to make sure we have enough slot there.
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*/
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#define RES_NUM 16
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struct pci_root_res {
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struct list_head list;
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struct resource res;
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};
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struct pci_root_info {
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struct list_head list;
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char name[12];
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unsigned int res_num;
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struct resource res[RES_NUM];
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struct list_head resources;
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int bus_min;
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int bus_max;
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int node;
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int link;
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};
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/* 4 at this time, it may become to 32 */
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#define PCI_ROOT_NR 4
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extern int pci_root_num;
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extern struct pci_root_info pci_root_info[PCI_ROOT_NR];
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extern struct list_head pci_root_infos;
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struct pci_root_info *alloc_pci_root_info(int bus_min, int bus_max,
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int node, int link);
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extern void update_res(struct pci_root_info *info, resource_size_t start,
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resource_size_t end, unsigned long flags, int merge);
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#endif
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