mirror of
https://github.com/torvalds/linux.git
synced 2024-12-15 15:41:58 +00:00
a18e3690a5
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Daniel Drake <dsd@laptop.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
154 lines
3.2 KiB
C
154 lines
3.2 KiB
C
/*
|
|
* mmconfig.c - Low-level direct PCI config space access via MMCONFIG
|
|
*
|
|
* This is an 64bit optimized version that always keeps the full mmconfig
|
|
* space mapped. This allows lockless config space operation.
|
|
*/
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/bitmap.h>
|
|
#include <linux/rcupdate.h>
|
|
#include <asm/e820.h>
|
|
#include <asm/pci_x86.h>
|
|
|
|
#define PREFIX "PCI: "
|
|
|
|
static char __iomem *pci_dev_base(unsigned int seg, unsigned int bus, unsigned int devfn)
|
|
{
|
|
struct pci_mmcfg_region *cfg = pci_mmconfig_lookup(seg, bus);
|
|
|
|
if (cfg && cfg->virt)
|
|
return cfg->virt + (PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12));
|
|
return NULL;
|
|
}
|
|
|
|
static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
|
|
unsigned int devfn, int reg, int len, u32 *value)
|
|
{
|
|
char __iomem *addr;
|
|
|
|
/* Why do we have this when nobody checks it. How about a BUG()!? -AK */
|
|
if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095))) {
|
|
err: *value = -1;
|
|
return -EINVAL;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
addr = pci_dev_base(seg, bus, devfn);
|
|
if (!addr) {
|
|
rcu_read_unlock();
|
|
goto err;
|
|
}
|
|
|
|
switch (len) {
|
|
case 1:
|
|
*value = mmio_config_readb(addr + reg);
|
|
break;
|
|
case 2:
|
|
*value = mmio_config_readw(addr + reg);
|
|
break;
|
|
case 4:
|
|
*value = mmio_config_readl(addr + reg);
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_mmcfg_write(unsigned int seg, unsigned int bus,
|
|
unsigned int devfn, int reg, int len, u32 value)
|
|
{
|
|
char __iomem *addr;
|
|
|
|
/* Why do we have this when nobody checks it. How about a BUG()!? -AK */
|
|
if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095)))
|
|
return -EINVAL;
|
|
|
|
rcu_read_lock();
|
|
addr = pci_dev_base(seg, bus, devfn);
|
|
if (!addr) {
|
|
rcu_read_unlock();
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (len) {
|
|
case 1:
|
|
mmio_config_writeb(addr + reg, value);
|
|
break;
|
|
case 2:
|
|
mmio_config_writew(addr + reg, value);
|
|
break;
|
|
case 4:
|
|
mmio_config_writel(addr + reg, value);
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct pci_raw_ops pci_mmcfg = {
|
|
.read = pci_mmcfg_read,
|
|
.write = pci_mmcfg_write,
|
|
};
|
|
|
|
static void __iomem *mcfg_ioremap(struct pci_mmcfg_region *cfg)
|
|
{
|
|
void __iomem *addr;
|
|
u64 start, size;
|
|
int num_buses;
|
|
|
|
start = cfg->address + PCI_MMCFG_BUS_OFFSET(cfg->start_bus);
|
|
num_buses = cfg->end_bus - cfg->start_bus + 1;
|
|
size = PCI_MMCFG_BUS_OFFSET(num_buses);
|
|
addr = ioremap_nocache(start, size);
|
|
if (addr)
|
|
addr -= PCI_MMCFG_BUS_OFFSET(cfg->start_bus);
|
|
return addr;
|
|
}
|
|
|
|
int __init pci_mmcfg_arch_init(void)
|
|
{
|
|
struct pci_mmcfg_region *cfg;
|
|
|
|
list_for_each_entry(cfg, &pci_mmcfg_list, list)
|
|
if (pci_mmcfg_arch_map(cfg)) {
|
|
pci_mmcfg_arch_free();
|
|
return 0;
|
|
}
|
|
|
|
raw_pci_ext_ops = &pci_mmcfg;
|
|
|
|
return 1;
|
|
}
|
|
|
|
void __init pci_mmcfg_arch_free(void)
|
|
{
|
|
struct pci_mmcfg_region *cfg;
|
|
|
|
list_for_each_entry(cfg, &pci_mmcfg_list, list)
|
|
pci_mmcfg_arch_unmap(cfg);
|
|
}
|
|
|
|
int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg)
|
|
{
|
|
cfg->virt = mcfg_ioremap(cfg);
|
|
if (!cfg->virt) {
|
|
pr_err(PREFIX "can't map MMCONFIG at %pR\n", &cfg->res);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg)
|
|
{
|
|
if (cfg && cfg->virt) {
|
|
iounmap(cfg->virt + PCI_MMCFG_BUS_OFFSET(cfg->start_bus));
|
|
cfg->virt = NULL;
|
|
}
|
|
}
|