Release 4.10 arch/x86/pci/mmconfig_32.c
/*
* Copyright (C) 2004 Matthew Wilcox <matthew@wil.cx>
* Copyright (C) 2004 Intel Corp.
*
* This code is released under the GNU General Public License version 2.
*/
/*
* mmconfig.c - Low-level direct PCI config space access via MMCONFIG
*/
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/rcupdate.h>
#include <asm/e820.h>
#include <asm/pci_x86.h>
/* Assume systems with more busses have correct MCFG */
#define mmcfg_virt_addr ((void __iomem *) fix_to_virt(FIX_PCIE_MCFG))
/* The base address of the last MMCONFIG device accessed */
static u32 mmcfg_last_accessed_device;
static int mmcfg_last_accessed_cpu;
/*
* Functions for accessing PCI configuration space with MMCONFIG accesses
*/
static u32 get_base_addr(unsigned int seg, int bus, unsigned devfn)
{
struct pci_mmcfg_region *cfg = pci_mmconfig_lookup(seg, bus);
if (cfg)
return cfg->address;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| greg kroah-hartman | greg kroah-hartman | 24 | 60.00% | 1 | 14.29% |
| bjorn helgaas | bjorn helgaas | 9 | 22.50% | 3 | 42.86% |
| andi kleen | andi kleen | 6 | 15.00% | 2 | 28.57% |
| alexey starikovskiy | alexey starikovskiy | 1 | 2.50% | 1 | 14.29% |
| Total | 40 | 100.00% | 7 | 100.00% |
/*
* This is always called under pci_config_lock
*/
static void pci_exp_set_dev_base(unsigned int base, int bus, int devfn)
{
u32 dev_base = base | PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12);
int cpu = smp_processor_id();
if (dev_base != mmcfg_last_accessed_device ||
cpu != mmcfg_last_accessed_cpu) {
mmcfg_last_accessed_device = dev_base;
mmcfg_last_accessed_cpu = cpu;
set_fixmap_nocache(FIX_PCIE_MCFG, dev_base);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| len brown | len brown | 42 | 64.62% | 1 | 16.67% |
| ogawa hirofumi | ogawa hirofumi | 14 | 21.54% | 1 | 16.67% |
| greg kroah-hartman | greg kroah-hartman | 3 | 4.62% | 1 | 16.67% |
| bjorn helgaas | bjorn helgaas | 3 | 4.62% | 1 | 16.67% |
| andi kleen | andi kleen | 2 | 3.08% | 1 | 16.67% |
| tom l. nguyen | tom l. nguyen | 1 | 1.54% | 1 | 16.67% |
| Total | 65 | 100.00% | 6 | 100.00% |
static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
unsigned int devfn, int reg, int len, u32 *value)
{
unsigned long flags;
u32 base;
if ((bus > 255) || (devfn > 255) || (reg > 4095)) {
err: *value = -1;
return -EINVAL;
}
rcu_read_lock();
base = get_base_addr(seg, bus, devfn);
if (!base) {
rcu_read_unlock();
goto err;
}
raw_spin_lock_irqsave(&pci_config_lock, flags);
pci_exp_set_dev_base(base, bus, devfn);
switch (len) {
case 1:
*value = mmio_config_readb(mmcfg_virt_addr + reg);
break;
case 2:
*value = mmio_config_readw(mmcfg_virt_addr + reg);
break;
case 4:
*value = mmio_config_readl(mmcfg_virt_addr + reg);
break;
}
raw_spin_unlock_irqrestore(&pci_config_lock, flags);
rcu_read_unlock();
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| len brown | len brown | 122 | 69.71% | 1 | 11.11% |
| ivan kokshaysky | ivan kokshaysky | 21 | 12.00% | 1 | 11.11% |
| andi kleen | andi kleen | 12 | 6.86% | 2 | 22.22% |
| jiang liu | jiang liu | 11 | 6.29% | 1 | 11.11% |
| bjorn helgaas | bjorn helgaas | 3 | 1.71% | 1 | 11.11% |
| dean gaudet | dean gaudet | 3 | 1.71% | 1 | 11.11% |
| thomas gleixner | thomas gleixner | 2 | 1.14% | 1 | 11.11% |
| greg kroah-hartman | greg kroah-hartman | 1 | 0.57% | 1 | 11.11% |
| Total | 175 | 100.00% | 9 | 100.00% |
static int pci_mmcfg_write(unsigned int seg, unsigned int bus,
unsigned int devfn, int reg, int len, u32 value)
{
unsigned long flags;
u32 base;
if ((bus > 255) || (devfn > 255) || (reg > 4095))
return -EINVAL;
rcu_read_lock();
base = get_base_addr(seg, bus, devfn);
if (!base) {
rcu_read_unlock();
return -EINVAL;
}
raw_spin_lock_irqsave(&pci_config_lock, flags);
pci_exp_set_dev_base(base, bus, devfn);
switch (len) {
case 1:
mmio_config_writeb(mmcfg_virt_addr + reg, value);
break;
case 2:
mmio_config_writew(mmcfg_virt_addr + reg, value);
break;
case 4:
mmio_config_writel(mmcfg_virt_addr + reg, value);
break;
}
raw_spin_unlock_irqrestore(&pci_config_lock, flags);
rcu_read_unlock();
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| len brown | len brown | 106 | 65.43% | 1 | 11.11% |
| ivan kokshaysky | ivan kokshaysky | 20 | 12.35% | 1 | 11.11% |
| jiang liu | jiang liu | 11 | 6.79% | 1 | 11.11% |
| dean gaudet | dean gaudet | 9 | 5.56% | 1 | 11.11% |
| linus torvalds | linus torvalds | 6 | 3.70% | 1 | 11.11% |
| andi kleen | andi kleen | 4 | 2.47% | 1 | 11.11% |
| bjorn helgaas | bjorn helgaas | 3 | 1.85% | 1 | 11.11% |
| thomas gleixner | thomas gleixner | 2 | 1.23% | 1 | 11.11% |
| greg kroah-hartman | greg kroah-hartman | 1 | 0.62% | 1 | 11.11% |
| Total | 162 | 100.00% | 9 | 100.00% |
const struct pci_raw_ops pci_mmcfg = {
.read = pci_mmcfg_read,
.write = pci_mmcfg_write,
};
int __init pci_mmcfg_arch_init(void)
{
printk(KERN_INFO "PCI: Using MMCONFIG for extended config space\n");
raw_pci_ext_ops = &pci_mmcfg;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| len brown | len brown | 14 | 63.64% | 1 | 25.00% |
| olivier galibert | olivier galibert | 5 | 22.73% | 1 | 25.00% |
| matthew wilcox | matthew wilcox | 2 | 9.09% | 1 | 25.00% |
| andi kleen | andi kleen | 1 | 4.55% | 1 | 25.00% |
| Total | 22 | 100.00% | 4 | 100.00% |
void __init pci_mmcfg_arch_free(void)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yinghai lu | yinghai lu | 7 | 100.00% | 1 | 100.00% |
| Total | 7 | 100.00% | 1 | 100.00% |
int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jiang liu | jiang liu | 13 | 100.00% | 1 | 100.00% |
| Total | 13 | 100.00% | 1 | 100.00% |
void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg)
{
unsigned long flags;
/* Invalidate the cached mmcfg map entry. */
raw_spin_lock_irqsave(&pci_config_lock, flags);
mmcfg_last_accessed_device = 0;
raw_spin_unlock_irqrestore(&pci_config_lock, flags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jiang liu | jiang liu | 35 | 100.00% | 1 | 100.00% |
| Total | 35 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| len brown | len brown | 319 | 56.06% | 2 | 6.67% |
| jiang liu | jiang liu | 73 | 12.83% | 2 | 6.67% |
| ivan kokshaysky | ivan kokshaysky | 41 | 7.21% | 1 | 3.33% |
| greg kroah-hartman | greg kroah-hartman | 31 | 5.45% | 2 | 6.67% |
| andi kleen | andi kleen | 26 | 4.57% | 5 | 16.67% |
| ogawa hirofumi | ogawa hirofumi | 18 | 3.16% | 1 | 3.33% |
| bjorn helgaas | bjorn helgaas | 18 | 3.16% | 5 | 16.67% |
| dean gaudet | dean gaudet | 12 | 2.11% | 1 | 3.33% |
| linus torvalds | linus torvalds | 7 | 1.23% | 2 | 6.67% |
| yinghai lu | yinghai lu | 7 | 1.23% | 1 | 3.33% |
| olivier galibert | olivier galibert | 5 | 0.88% | 1 | 3.33% |
| thomas gleixner | thomas gleixner | 4 | 0.70% | 1 | 3.33% |
| matthew wilcox | matthew wilcox | 2 | 0.35% | 1 | 3.33% |
| feng tang | feng tang | 2 | 0.35% | 1 | 3.33% |
| alexey starikovskiy | alexey starikovskiy | 1 | 0.18% | 1 | 3.33% |
| andrew morton | andrew morton | 1 | 0.18% | 1 | 3.33% |
| jan beulich | jan beulich | 1 | 0.18% | 1 | 3.33% |
| tom l. nguyen | tom l. nguyen | 1 | 0.18% | 1 | 3.33% |
| Total | 569 | 100.00% | 30 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.