Kyösti Mälkki (kyosti.malkki@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8539
-gerrit
commit 13c73ca3d1371ed8702cfad8bf78a31fcfcb6246 Author: Kyösti Mälkki kyosti.malkki@gmail.com Date: Wed Mar 18 13:09:47 2015 +0200
PCI subsystem: Drop parameter max from scan_bus
Change-Id: Ib33d3363c8d42fa54ac07c11a7ab2bc7ee4ae8bf Signed-off-by: Kyösti Mälkki kyosti.malkki@gmail.com --- src/device/hypertransport.c | 9 +++------ src/device/pci_device.c | 24 ++++++++++-------------- src/device/pciexp_device.c | 7 +++---- src/include/device/pci.h | 9 ++++++--- src/include/device/pciexp.h | 5 +++-- src/include/device/pcix.h | 2 -- src/northbridge/amd/agesa/family10/northbridge.c | 6 ++++-- src/northbridge/amd/agesa/family15/northbridge.c | 6 ++++-- src/northbridge/amd/amdfam10/northbridge.c | 4 ++-- src/northbridge/amd/amdk8/northbridge.c | 4 ++-- src/southbridge/amd/amd8131/bridge.c | 12 +++++------- src/southbridge/amd/amd8132/bridge.c | 13 +++++-------- 12 files changed, 47 insertions(+), 54 deletions(-)
diff --git a/src/device/hypertransport.c b/src/device/hypertransport.c index 2c975de..032c1ce 100644 --- a/src/device/hypertransport.c +++ b/src/device/hypertransport.c @@ -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) diff --git a/src/device/pci_device.c b/src/device/pci_device.c index fe03d61..188f101 100644 --- a/src/device/pci_device.c +++ b/src/device/pci_device.c @@ -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; }
diff --git a/src/device/pciexp_device.c b/src/device/pciexp_device.c index 5e1f114..bd6259c 100644 --- a/src/device/pciexp_device.c +++ b/src/device/pciexp_device.c @@ -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) diff --git a/src/include/device/pci.h b/src/include/device/pci.h index 4e712f9..729d6a1 100644 --- a/src/include/device/pci.h +++ b/src/include/device/pci.h @@ -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); diff --git a/src/include/device/pciexp.h b/src/include/device/pciexp.h index 1146557..b600228 100644 --- a/src/include/device/pciexp.h +++ b/src/include/device/pciexp.h @@ -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; diff --git a/src/include/device/pcix.h b/src/include/device/pcix.h index 4ffab5b..75be7aa 100644 --- a/src/include/device/pcix.h +++ b/src/include/device/pcix.h @@ -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);
diff --git a/src/northbridge/amd/agesa/family10/northbridge.c b/src/northbridge/amd/agesa/family10/northbridge.c index c7678c7..69cc47c 100644 --- a/src/northbridge/amd/agesa/family10/northbridge.c +++ b/src/northbridge/amd/agesa/family10/northbridge.c @@ -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; }
diff --git a/src/northbridge/amd/agesa/family15/northbridge.c b/src/northbridge/amd/agesa/family15/northbridge.c index 07ef2b6..0e32ede 100644 --- a/src/northbridge/amd/agesa/family15/northbridge.c +++ b/src/northbridge/amd/agesa/family15/northbridge.c @@ -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; @@ -966,7 +968,7 @@ 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; }
diff --git a/src/northbridge/amd/amdfam10/northbridge.c b/src/northbridge/amd/amdfam10/northbridge.c index 5dacd5d..a921a94 100644 --- a/src/northbridge/amd/amdfam10/northbridge.c +++ b/src/northbridge/amd/amdfam10/northbridge.c @@ -261,7 +261,7 @@ 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 @@ -922,7 +922,7 @@ 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; }
diff --git a/src/northbridge/amd/amdk8/northbridge.c b/src/northbridge/amd/amdk8/northbridge.c index d31e87b..8cbaf32 100644 --- a/src/northbridge/amd/amdk8/northbridge.c +++ b/src/northbridge/amd/amdk8/northbridge.c @@ -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 @@ -1138,7 +1138,7 @@ 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. diff --git a/src/southbridge/amd/amd8131/bridge.c b/src/southbridge/amd/amd8131/bridge.c index e638fae..cb76980 100644 --- a/src/southbridge/amd/amd8131/bridge.c +++ b/src/southbridge/amd/amd8131/bridge.c @@ -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) diff --git a/src/southbridge/amd/amd8132/bridge.c b/src/southbridge/amd/amd8132/bridge.c index eecb11b..5df315d 100644 --- a/src/southbridge/amd/amd8132/bridge.c +++ b/src/southbridge/amd/amd8132/bridge.c @@ -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)