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PCI subsystem: Drop parameter max from scan_bus 

Change-Id: Ib33d3363c8d42fa54ac07c11a7ab2bc7ee4ae8bf
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/8539
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Kyösti Mälkki 2015-03-18 13:09:47 +02:00
parent 757c8b485b
commit de271a8f0a
12 changed files with 47 additions and 54 deletions
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9
src/device/hypertransport.c
View File

@ -488,11 +488,9 @@ end_of_chain:
* @param bus TODO
* @param min_devfn TODO
* @param max_devfn TODO
* @param max The highest bus number assigned up to now.
* @return The maximum bus number found, after scanning all subordinate busses.
*/
static unsigned int hypertransport_scan_chain_x(struct bus *bus,
unsigned int min_devfn, unsigned int max_devfn, unsigned int max)
static void hypertransport_scan_chain_x(struct bus *bus,
unsigned int min_devfn, unsigned int max_devfn)
{
unsigned int ht_unitid_base[4];
unsigned int offset_unitid = 1;
@ -501,8 +499,7 @@ static unsigned int hypertransport_scan_chain_x(struct bus *bus,
ht_unitid_base, offset_unitid);
/* Now that nothing is overlapping it is safe to scan the children. */
bus->subordinate = pci_scan_bus(bus, 0x00, ((next_unitid - 1) << 3) | 7, bus->secondary);
return bus->subordinate;
pci_scan_bus(bus, 0x00, ((next_unitid - 1) << 3) | 7);
}
unsigned int ht_scan_bridge(struct device *dev, unsigned int max)

24
src/device/pci_device.c
View File

@ -1074,17 +1074,12 @@ unsigned int pci_match_simple_dev(device_t dev, pci_devfn_t sdev)
* Determine the existence of devices and bridges on a PCI bus. If there are
* bridges on the bus, recursively scan the buses behind the bridges.
*
* This function is the default scan_bus() method for the root device
* 'dev_root'.
*
* @param bus Pointer to the bus structure.
* @param min_devfn Minimum devfn to look at in the scan, usually 0x00.
* @param max_devfn Maximum devfn to look at in the scan, usually 0xff.
* @param max Current bus number.
* @return The maximum bus number found, after scanning all subordinate busses.
*/
unsigned int pci_scan_bus(struct bus *bus, unsigned min_devfn,
unsigned max_devfn, unsigned int max)
void pci_scan_bus(struct bus *bus, unsigned min_devfn,
unsigned max_devfn)
{
unsigned int devfn;
struct device *old_devices;
@ -1149,17 +1144,19 @@ unsigned int pci_scan_bus(struct bus *bus, unsigned min_devfn,
* For all children that implement scan_bus() (i.e. bridges)
* scan the bus behind that child.
*/
unsigned int max = bus->secondary;
for (child = bus->children; child; child = child->sibling)
max = scan_bus(child, max);
bus->subordinate = max;
/*
* We've scanned the bus and so we know all about what's on the other
* side of any bridges that may be on this bus plus any devices.
* Return how far we've got finding sub-buses.
*/
printk(BIOS_DEBUG, "PCI: pci_scan_bus returning with max=%03x\n", max);
post_code(0x55);
return max;
}
typedef enum {
@ -1228,10 +1225,9 @@ static void pci_bridge_route(struct bus *link, scan_state state)
* @return The maximum bus number found, after scanning all subordinate buses.
*/
unsigned int do_pci_scan_bridge(struct device *dev, unsigned int max,
unsigned int (*do_scan_bus) (struct bus * bus,
void (*do_scan_bus) (struct bus * bus,
unsigned min_devfn,
unsigned max_devfn,
unsigned int max))
unsigned max_devfn))
{
struct bus *bus;
@ -1251,7 +1247,7 @@ unsigned int do_pci_scan_bridge(struct device *dev, unsigned int max,
pci_bridge_route(bus, PCI_ROUTE_SCAN);
bus->subordinate = do_scan_bus(bus, 0x00, 0xff, bus->secondary);
do_scan_bus(bus, 0x00, 0xff);
pci_bridge_route(bus, PCI_ROUTE_FINAL);
@ -1287,7 +1283,7 @@ unsigned int pci_scan_bridge(struct device *dev, unsigned int max)
unsigned int pci_domain_scan_bus(device_t dev, unsigned int unused)
{
struct bus *link = dev->link_list;
link->subordinate = pci_scan_bus(link, PCI_DEVFN(0, 0), 0xff, link->secondary);
pci_scan_bus(link, PCI_DEVFN(0, 0), 0xff);
return unused;
}

7
src/device/pciexp_device.c
View File

@ -416,12 +416,12 @@ static void pciexp_tune_dev(device_t dev)
#endif
}
unsigned int pciexp_scan_bus(struct bus *bus, unsigned int min_devfn,
unsigned int max_devfn, unsigned int max)
void pciexp_scan_bus(struct bus *bus, unsigned int min_devfn,
unsigned int max_devfn)
{
device_t child;
max = pci_scan_bus(bus, min_devfn, max_devfn, max);
pci_scan_bus(bus, min_devfn, max_devfn);
for (child = bus->children; child; child = child->sibling) {
if ((child->path.pci.devfn < min_devfn) ||
@ -430,7 +430,6 @@ unsigned int pciexp_scan_bus(struct bus *bus, unsigned int min_devfn,
}
pciexp_tune_dev(child);
}
return max;
}
unsigned int pciexp_scan_bridge(device_t dev, unsigned int max)

9
src/include/device/pci.h
View File

@ -70,11 +70,14 @@ void pci_dev_enable_resources(device_t dev);
void pci_bus_enable_resources(device_t dev);
void pci_bus_reset(struct bus *bus);
device_t pci_probe_dev(device_t dev, struct bus *bus, unsigned devfn);
unsigned int do_pci_scan_bridge(device_t bus, unsigned int max,
unsigned int (*do_scan_bus)(struct bus *bus,
unsigned min_devfn, unsigned max_devfn, unsigned int max));
void (*do_scan_bus)(struct bus *bus,
unsigned min_devfn, unsigned max_devfn));
unsigned int pci_scan_bridge(device_t bus, unsigned int max);
unsigned int pci_scan_bus(struct bus *bus, unsigned min_devfn, unsigned max_devfn, unsigned int max);
void pci_scan_bus(struct bus *bus, unsigned min_devfn, unsigned max_devfn);
uint8_t pci_moving_config8(struct device *dev, unsigned reg);
uint16_t pci_moving_config16(struct device *dev, unsigned reg);
uint32_t pci_moving_config32(struct device *dev, unsigned reg);

5
src/include/device/pciexp.h
View File

@ -9,8 +9,9 @@ enum aspm_type {
PCIE_ASPM_BOTH = 3,
};
unsigned int pciexp_scan_bus(struct bus *bus, unsigned int min_devfn,
unsigned int max_devfn, unsigned int max);
void pciexp_scan_bus(struct bus *bus, unsigned int min_devfn,
unsigned int max_devfn);
unsigned int pciexp_scan_bridge(device_t dev, unsigned int max);
extern struct device_operations default_pciexp_ops_bus;

2
src/include/device/pcix.h
View File

@ -2,8 +2,6 @@
#define DEVICE_PCIX_H
/* (c) 2005 Linux Networx GPL see COPYING for details */
unsigned int pcix_scan_bus(struct bus *bus, unsigned int min_devfn,
unsigned int max_devfn, unsigned int max);
unsigned int pcix_scan_bridge(device_t dev, unsigned int max);
const char *pcix_speed(u16 sstatus);

6
src/northbridge/amd/agesa/family10/northbridge.c
View File

@ -565,6 +565,7 @@ static unsigned amdfam10_scan_chains(device_t dev, unsigned unused)
nodeid = amdfam10_nodeid(dev);
if (nodeid == 0) {
ASSERT(dev->bus->secondary == 0);
for (link = dev->link_list; link; link = link->next) {
if (link->link_num == sblink) { /* devicetree put IO Hub on link_lsit[3] */
io_hub = link->children;
@ -572,9 +573,10 @@ static unsigned amdfam10_scan_chains(device_t dev, unsigned unused)
die("I can't find the IO Hub, or IO Hub not enabled, please check the device tree.\n");
}
/* Now that nothing is overlapping it is safe to scan the children. */
max = pci_scan_bus(link, 0x00, ((next_unitid - 1) << 3) | 7, 0);
pci_scan_bus(link, 0x00, ((next_unitid - 1) << 3) | 7);
}
}
max = dev->bus->subordinate;
}
dev->bus->subordinate = max;
@ -917,7 +919,7 @@ static u32 amdfam10_domain_scan_bus(device_t dev, u32 unused)
for (link = dev->link_list; link; link = link->next) {
link->secondary = dev->bus->subordinate;
link->subordinate = pci_scan_bus(link, PCI_DEVFN(CONFIG_CDB, 0), 0xff, link->secondary);
pci_scan_bus(link, PCI_DEVFN(CONFIG_CDB, 0), 0xff);
dev->bus->subordinate = link->subordinate;
}

6
src/northbridge/amd/agesa/family15/northbridge.c
View File

@ -469,6 +469,7 @@ static unsigned scan_chains(device_t dev, unsigned unused)
nodeid = amdfam15_nodeid(dev);
if (nodeid == 0) {
ASSERT(dev->bus->secondary == 0);
for (link = dev->link_list; link; link = link->next) {
//if (link->link_num == sblink) { /* devicetree put IO Hub on link_lsit[sblink] */
if (link->link_num == 0) { /* devicetree put IO Hub on link_lsit[0] */
@ -477,9 +478,10 @@ static unsigned scan_chains(device_t dev, unsigned unused)
die("I can't find the IO Hub, or IO Hub not enabled, please check the device tree.\n");
}
/* Now that nothing is overlapping it is safe to scan the children. */
max = pci_scan_bus(link, 0x00, ((next_unitid - 1) << 3) | 7, 0);
pci_scan_bus(link, 0x00, ((next_unitid - 1) << 3) | 7);
}
}
max = dev->bus->subordinate;
}
dev->bus->subordinate = max;
@ -954,7 +956,7 @@ static void domain_set_resources(device_t dev)
static unsigned int f15_pci_domain_scan_bus(device_t dev, unsigned int unused)
{
struct bus *link = dev->link_list;
link->subordinate = pci_scan_bus(link, PCI_DEVFN(0x18, 0), 0xff, link->secondary);
pci_scan_bus(link, PCI_DEVFN(0x18, 0), 0xff);
return unused;
}

4
src/northbridge/amd/amdfam10/northbridge.c
View File

@ -263,7 +263,7 @@ static u32 amdfam10_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool
next_unitid = hypertransport_scan_chain(link, 0, max_devfn, ht_unitid_base, offset_unit_id(is_sblink));
/* Now that nothing is overlapping it is safe to scan the children. */
link->subordinate = pci_scan_bus(link, 0x00, ((next_unitid - 1) << 3) | 7, link->secondary);
pci_scan_bus(link, 0x00, ((next_unitid - 1) << 3) | 7);
/* We know the number of busses behind this bridge. Set the
* subordinate bus number to it's real value
@ -924,7 +924,7 @@ static u32 amdfam10_domain_scan_bus(device_t dev, u32 unused)
for(link = dev->link_list; link; link = link->next) {
link->secondary = dev->bus->subordinate;
link->subordinate = pci_scan_bus(link, PCI_DEVFN(CONFIG_CDB, 0), 0xff, link->secondary);
pci_scan_bus(link, PCI_DEVFN(CONFIG_CDB, 0), 0xff);
dev->bus->subordinate = link->subordinate;
}

4
src/northbridge/amd/amdk8/northbridge.c
View File

@ -213,7 +213,7 @@ static u32 amdk8_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool is_
next_unitid = hypertransport_scan_chain(link, 0, max_devfn, ht_unitid_base, offset_unit_id(is_sblink));
/* Now that nothing is overlapping it is safe to scan the children. */
link->subordinate = pci_scan_bus(link, 0x00, ((next_unitid - 1) << 3) | 7, link->secondary);
pci_scan_bus(link, 0x00, ((next_unitid - 1) << 3) | 7);
/* We know the number of busses behind this bridge. Set the
* subordinate bus number to it's real value
@ -1107,7 +1107,7 @@ static u32 amdk8_domain_scan_bus(device_t dev, u32 unused)
}
link->secondary = dev->bus->subordinate;
link->subordinate = pci_scan_bus(link, PCI_DEVFN(0x18, 0), 0xff, link->secondary);
pci_scan_bus(link, PCI_DEVFN(0x18, 0), 0xff);
dev->bus->subordinate = link->subordinate;
/* Tune the hypertransport transaction for best performance.

12
src/southbridge/amd/amd8131/bridge.c
View File

@ -192,16 +192,15 @@ static void amd8131_pcix_tune_dev(device_t dev, void *ptr)
pci_write_config16(dev, cap + PCI_X_CMD, cmd);
}
}
static unsigned int amd8131_scan_bus(struct bus *bus,
unsigned min_devfn, unsigned max_devfn, unsigned int max)
static void amd8131_scan_bus(struct bus *bus,
unsigned min_devfn, unsigned max_devfn)
{
struct amd8131_bus_info info;
struct bus *pbus;
unsigned pos;
/* Find the children on the bus */
max = pci_scan_bus(bus, min_devfn, max_devfn, max);
pci_scan_bus(bus, min_devfn, max_devfn);
/* Find the revision of the 8131 */
info.rev = pci_read_config8(bus->dev, PCI_CLASS_REVISION);
@ -243,13 +242,13 @@ static unsigned int amd8131_scan_bus(struct bus *bus,
pcix_misc &= ~(0x1f << 16);
pci_write_config32(bus->dev, 0x40, pcix_misc);
return max;
return;
}
/* If we are in conventional PCI mode nothing more is necessary.
*/
if (PCI_X_SSTATUS_MFREQ(info.sstatus) == PCI_X_SSTATUS_CONVENTIONAL_PCI) {
return max;
return;
}
@ -264,7 +263,6 @@ static unsigned int amd8131_scan_bus(struct bus *bus,
bus_path(pbus));
pbus->disable_relaxed_ordering = 1;
}
return max;
}
static unsigned int amd8131_scan_bridge(device_t dev, unsigned int max)

13
src/southbridge/amd/amd8132/bridge.c
View File

@ -138,15 +138,14 @@ static void amd8132_pcix_tune_dev(device_t dev, void *ptr)
}
static unsigned int amd8132_scan_bus(struct bus *bus,
unsigned min_devfn, unsigned max_devfn, unsigned int max)
static void amd8132_scan_bus(struct bus *bus,
unsigned min_devfn, unsigned max_devfn)
{
struct amd8132_bus_info info;
unsigned pos;
/* Find the children on the bus */
max = pci_scan_bus(bus, min_devfn, max_devfn, max);
pci_scan_bus(bus, min_devfn, max_devfn);
/* Find the revision of the 8132 */
info.rev = pci_read_config8(bus->dev, PCI_CLASS_REVISION);
@ -181,20 +180,18 @@ static unsigned int amd8132_scan_bus(struct bus *bus,
pcix_misc &= ~(0x1f << 16);
pci_write_config32(bus->dev, 0x40, pcix_misc);
return max;
return;
}
#endif
/* If we are in conventional PCI mode nothing more is necessary.
*/
if (PCI_X_SSTATUS_MFREQ(info.sstatus) == PCI_X_SSTATUS_CONVENTIONAL_PCI) {
return max;
return;
}
/* Tune the devices on the bus */
amd8132_walk_children(bus, amd8132_pcix_tune_dev, &info);
return max;
}
static unsigned int amd8132_scan_bridge(device_t dev, unsigned int max)