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From: Yinghai Lu on 27 Oct 2009 04:20

revert

| commit 28760489a3f1e136c5ae8581c0fa8f63511f2f4c
| Author: Eric W. Biederman <ebiederm(a)aristanetworks.com>
| Date: Wed Sep 9 14:09:24 2009 -0700
|
| PCI: pcie: Ensure hotplug ports have a minimum number of resources

we don't need this trick anymore. the bridge BAR will be updated automatically

Signed-off-by: Yinghai Lu <yinghai(a)kernel.org>

---
drivers/pci/pci.c | 10 ----------
drivers/pci/probe.c | 18 ------------------
drivers/pci/setup-bus.c | 22 +++++-----------------
include/linux/pci.h | 4 ----
4 files changed, 5 insertions(+), 49 deletions(-)

Index: linux-2.6/drivers/pci/pci.c
===================================================================
--- linux-2.6.orig/drivers/pci/pci.c
+++ linux-2.6/drivers/pci/pci.c
@@ -41,12 +41,6 @@ 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;
-
/*
* The default CLS is used if arch didn't set CLS explicitly and not
* all pci devices agree on the same value. Arch can override either
@@ -2787,10 +2781,6 @@ 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);
Index: linux-2.6/drivers/pci/probe.c
===================================================================
--- linux-2.6.orig/drivers/pci/probe.c
+++ linux-2.6/drivers/pci/probe.c
@@ -689,23 +689,6 @@ static void set_pcie_port_type(struct pc
pdev->pcie_type = (reg16 & PCI_EXP_FLAGS_TYPE) >> 4;
}

-static void set_pcie_hotplug_bridge(struct pci_dev *pdev)
-{
- int pos;
- u16 reg16;
- u32 reg32;
-
- pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
- if (!pos)
- return;
- pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, &reg16);
- if (!(reg16 & PCI_EXP_FLAGS_SLOT))
- return;
- pci_read_config_dword(pdev, pos + PCI_EXP_SLTCAP, &reg32);
- if (reg32 & PCI_EXP_SLTCAP_HPC)
- pdev->is_hotplug_bridge = 1;
-}
-
#define LEGACY_IO_RESOURCE (IORESOURCE_IO | IORESOURCE_PCI_FIXED)

/**
@@ -813,7 +796,6 @@ int pci_setup_device(struct pci_dev *dev
pci_read_irq(dev);
dev->transparent = ((dev->class & 0xff) == 1);
pci_read_bases(dev, 2, PCI_ROM_ADDRESS1);
- set_pcie_hotplug_bridge(dev);
break;

case PCI_HEADER_TYPE_CARDBUS: /* CardBus bridge header */
Index: linux-2.6/drivers/pci/setup-bus.c
===================================================================
--- linux-2.6.orig/drivers/pci/setup-bus.c
+++ linux-2.6/drivers/pci/setup-bus.c
@@ -375,7 +375,7 @@ static struct resource *find_free_bus_re
since these windows have 4K granularity and the IO ranges
of non-bridge PCI devices are limited to 256 bytes.
We must be careful with the ISA aliasing though. */
-static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size)
+static void pbus_size_io(struct pci_bus *bus)
{
struct pci_dev *dev;
struct resource *b_res = find_free_bus_resource(bus, IORESOURCE_IO);
@@ -402,8 +402,6 @@ static void pbus_size_io(struct pci_bus
size1 += r_size;
}
}
- if (size < min_size)
- size = min_size;
/* To be fixed in 2.5: we should have sort of HAVE_ISA
flag in the struct pci_bus. */
#if defined(CONFIG_ISA) || defined(CONFIG_EISA)
@@ -422,8 +420,7 @@ static void pbus_size_io(struct pci_bus

/* Calculate the size of the bus and minimal alignment which
guarantees that all child resources fit in this size. */
-static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
- unsigned long type, resource_size_t min_size)
+static int pbus_size_mem(struct pci_bus *bus, unsigned long mask, unsigned long type)
{
struct pci_dev *dev;
resource_size_t min_align, align, size;
@@ -473,8 +470,6 @@ static int pbus_size_mem(struct pci_bus
mem64_mask &= r->flags & IORESOURCE_MEM_64;
}
}
- if (size < min_size)
- size = min_size;

align = 0;
min_align = 0;
@@ -554,7 +549,6 @@ void __ref pci_bus_size_bridges(struct p
{
struct pci_dev *dev;
unsigned long mask, prefmask;
- resource_size_t min_mem_size = 0, min_io_size = 0;

list_for_each_entry(dev, &bus->devices, bus_list) {
struct pci_bus *b = dev->subordinate;
@@ -584,12 +578,8 @@ void __ref pci_bus_size_bridges(struct p

case PCI_CLASS_BRIDGE_PCI:
pci_bridge_check_ranges(bus);
- if (bus->self->is_hotplug_bridge) {
- min_io_size = pci_hotplug_io_size;
- min_mem_size = pci_hotplug_mem_size;
- }
default:
- pbus_size_io(bus, min_io_size);
+ pbus_size_io(bus);
/* If the bridge supports prefetchable range, size it
separately. If it doesn't, or its prefetchable window
has already been allocated by arch code, try
@@ -597,11 +587,9 @@ void __ref pci_bus_size_bridges(struct p
resources. */
mask = IORESOURCE_MEM;
prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH;
- if (pbus_size_mem(bus, prefmask, prefmask, min_mem_size))
+ if (pbus_size_mem(bus, prefmask, prefmask))
mask = prefmask; /* Success, size non-prefetch only. */
- else
- min_mem_size += min_mem_size;
- pbus_size_mem(bus, mask, IORESOURCE_MEM, min_mem_size);
+ pbus_size_mem(bus, mask, IORESOURCE_MEM);
break;
}
}
Index: linux-2.6/include/linux/pci.h
===================================================================
--- linux-2.6.orig/include/linux/pci.h
+++ linux-2.6/include/linux/pci.h
@@ -279,7 +279,6 @@ struct pci_dev {
unsigned int is_physfn:1;
unsigned int is_virtfn:1;
unsigned int reset_fn:1;
- unsigned int is_hotplug_bridge:1;
pci_dev_flags_t dev_flags;
atomic_t enable_cnt; /* pci_enable_device has been called */

@@ -1256,9 +1255,6 @@ extern unsigned long pci_cardbus_mem_siz
extern u8 pci_dfl_cache_line_size;
extern u8 pci_cache_line_size;

-extern unsigned long pci_hotplug_io_size;
-extern unsigned long pci_hotplug_mem_size;
-
int pcibios_add_platform_entries(struct pci_dev *dev);
void pcibios_disable_device(struct pci_dev *dev);
int pcibios_set_pcie_reset_state(struct pci_dev *dev,

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Prev: [Bug #14372] ath5k wireless not working after suspend-resume - eeepc
Next: ark3116: (3rd try) Setup some basic infrastructure for new ark3116 driver.