diff options
| author | Eric W. Biederman <ebiederm@aristanetworks.com> | 2009-09-09 14:09:24 -0700 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-09-09 14:10:24 -0700 |
| commit | 28760489a3f1e136c5ae8581c0fa8f63511f2f4c (patch) | |
| tree | a3c890e9c8d9e98385691d56f5c007d280514fe5 /drivers/pci/pci.c | |
| parent | 0ba379ec0fb182a87b8891c5754abbcd9c035b4f (diff) | |
PCI: pcie: Ensure hotplug ports have a minimum number of resources
In general a BIOS may goof or we may hotplug in a hotplug controller.
In either case the kernel needs to reserve resources for plugging
in more devices in the future instead of creating a minimal resource
assignment.
We already do this for cardbus bridges I am just adding a variant
for pcie bridges.
v2: Make testing for pcie hotplug bridges based on a flag.
So far we only set the flag for pcie but a header_quirk
could easily be added for the non-standard pci hotplug
bridges.
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index bd993351db4..8c663d628d0 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -41,6 +41,12 @@ int pci_domains_supported = 1; unsigned long pci_cardbus_io_size = DEFAULT_CARDBUS_IO_SIZE; unsigned long pci_cardbus_mem_size = DEFAULT_CARDBUS_MEM_SIZE; +#define DEFAULT_HOTPLUG_IO_SIZE (256) +#define DEFAULT_HOTPLUG_MEM_SIZE (2*1024*1024) +/* pci=hpmemsize=nnM,hpiosize=nn can override this */ +unsigned long pci_hotplug_io_size = DEFAULT_HOTPLUG_IO_SIZE; +unsigned long pci_hotplug_mem_size = DEFAULT_HOTPLUG_MEM_SIZE; + /** * pci_bus_max_busnr - returns maximum PCI bus number of given bus' children * @bus: pointer to PCI bus structure to search @@ -2732,6 +2738,10 @@ static int __init pci_setup(char *str) strlen(str + 19)); } else if (!strncmp(str, "ecrc=", 5)) { pcie_ecrc_get_policy(str + 5); + } else if (!strncmp(str, "hpiosize=", 9)) { + pci_hotplug_io_size = memparse(str + 9, &str); + } else if (!strncmp(str, "hpmemsize=", 10)) { + pci_hotplug_mem_size = memparse(str + 10, &str); } else { printk(KERN_ERR "PCI: Unknown option `%s'\n", str); |