From: wangyijing@huawei.com (Yijing Wang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 16/29] powerpc/pci: Use pci_scan_host_bridge() for simplicity
Date: Fri, 6 Mar 2015 17:33:33 +0800 [thread overview]
Message-ID: <1425634426-437-17-git-send-email-wangyijing@huawei.com> (raw)
In-Reply-To: <1425634426-437-1-git-send-email-wangyijing@huawei.com>
Now we could use pci_scan_host_bridge() to scan
pci buses, provide powerpc specific pci_host_bridge_ops.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: linuxppc-dev at lists.ozlabs.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
arch/powerpc/include/asm/machdep.h | 2 +-
arch/powerpc/kernel/pci-common.c | 63 ++++++++++++++++++------------
arch/powerpc/platforms/pseries/pci.c | 8 ++--
arch/powerpc/platforms/pseries/pseries.h | 2 +-
4 files changed, 44 insertions(+), 31 deletions(-)
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index 8e7f2a8..b811d12 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -129,7 +129,7 @@ struct machdep_calls {
void (*pcibios_fixup)(void);
int (*pci_probe_mode)(struct pci_bus *);
void (*pci_irq_fixup)(struct pci_dev *dev);
- int (*pcibios_set_root_bus_speed)(struct pci_host_bridge
+ void (*pcibios_set_root_bus_speed)(struct pci_host_bridge
*bridge);
/* To setup PHBs when using automatic OF platform driver for PCI */
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 0d8b369..71f0077 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -767,14 +767,37 @@ int pci_proc_domain(struct pci_bus *bus)
return 1;
}
-int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
+static void pci_host_bridge_set_root_bus_speed(
+ struct pci_host_bridge *bridge)
{
if (ppc_md.pcibios_set_root_bus_speed)
- return ppc_md.pcibios_set_root_bus_speed(bridge);
+ ppc_md.pcibios_set_root_bus_speed(bridge);
return 0;
}
+static void pci_host_bridge_of_scan_bus(struct pci_host_bridge *host)
+{
+ int mode = PCI_PROBE_NORMAL;
+ struct pci_bus *bus = host->bus;
+ struct pci_controller *hose = dev_get_drvdata(&host->dev);
+
+ /* Get probe mode and perform scan */
+ if (hose->dn && ppc_md.pci_probe_mode)
+ mode = ppc_md.pci_probe_mode(bus);
+
+ pr_debug(" probe mode: %d\n", mode);
+ if (mode == PCI_PROBE_DEVTREE)
+ of_scan_bus(hose->dn, bus);
+
+ if (mode == PCI_PROBE_NORMAL) {
+ pci_bus_update_busn_res_end(bus, 255);
+ hose->last_busno = pci_scan_child_bus(bus);
+ pci_bus_update_busn_res_end(bus, hose->last_busno);
+ }
+}
+
+
/* This header fixup will do the resource fixup for all devices as they are
* probed, but not for bridge ranges
*/
@@ -1587,6 +1610,11 @@ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
return of_node_get(hose->dn);
}
+static struct pci_host_bridge_ops phb_ops = {
+ .set_root_bus_speed = pci_host_bridge_set_root_bus_speed,
+ .scan_bus = pci_host_bridge_of_scan_bus,
+};
+
/**
* pci_scan_phb - Given a pci_controller, setup and scan the PCI bus
* @hose: Pointer to the PCI host controller instance structure
@@ -1594,9 +1622,8 @@ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
void pcibios_scan_phb(struct pci_controller *hose)
{
LIST_HEAD(resources);
- struct pci_bus *bus;
+ struct pci_host_bridge *host;
struct device_node *node = hose->dn;
- int mode;
pr_debug("PCI: Scanning PHB %s\n", of_node_full_name(node));
@@ -1612,30 +1639,16 @@ void pcibios_scan_phb(struct pci_controller *hose)
pci_add_resource(&resources, &hose->busn);
/* Create an empty bus for the toplevel */
- bus = pci_create_root_bus(hose->parent,
+ host = pci_scan_host_bridge(hose->parent,
PCI_DOMBUS(hose->global_number, hose->first_busno),
- hose->ops, hose, &resources);
- if (bus == NULL) {
- pr_err("Failed to create bus for PCI domain %04x\n",
+ hose->ops, hose, &resources, &phb_ops);
+ if (host == NULL) {
+ pr_err("Failed to create host bridge for PCI domain %04x\n",
hose->global_number);
pci_free_resource_list(&resources);
return;
}
- hose->bus = bus;
-
- /* Get probe mode and perform scan */
- mode = PCI_PROBE_NORMAL;
- if (node && ppc_md.pci_probe_mode)
- mode = ppc_md.pci_probe_mode(bus);
- pr_debug(" probe mode: %d\n", mode);
- if (mode == PCI_PROBE_DEVTREE)
- of_scan_bus(node, bus);
-
- if (mode == PCI_PROBE_NORMAL) {
- pci_bus_update_busn_res_end(bus, 255);
- hose->last_busno = pci_scan_child_bus(bus);
- pci_bus_update_busn_res_end(bus, hose->last_busno);
- }
+ hose->bus = host->bus;
/* Platform gets a chance to do some global fixups before
* we proceed to resource allocation
@@ -1644,9 +1657,9 @@ void pcibios_scan_phb(struct pci_controller *hose)
ppc_md.pcibios_fixup_phb(hose);
/* Configure PCI Express settings */
- if (bus && !pci_has_flag(PCI_PROBE_ONLY)) {
+ if (host->bus && !pci_has_flag(PCI_PROBE_ONLY)) {
struct pci_bus *child;
- list_for_each_entry(child, &bus->children, node)
+ list_for_each_entry(child, &host->bus->children, node)
pcie_bus_configure_settings(child);
}
}
diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c
index af685d6..89ff79c 100644
--- a/arch/powerpc/platforms/pseries/pci.c
+++ b/arch/powerpc/platforms/pseries/pci.c
@@ -110,7 +110,7 @@ static void fixup_winbond_82c105(struct pci_dev* dev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
fixup_winbond_82c105);
-int pseries_set_root_bus_speed(struct pci_host_bridge *bridge)
+void pseries_set_root_bus_speed(struct pci_host_bridge *bridge)
{
struct device_node *dn, *pdn;
struct pci_bus *bus;
@@ -121,7 +121,7 @@ int pseries_set_root_bus_speed(struct pci_host_bridge *bridge)
dn = pcibios_get_phb_of_node(bus);
if (!dn)
- return 0;
+ return;
for (pdn = dn; pdn != NULL; pdn = of_get_next_parent(pdn)) {
rc = of_property_read_u32_array(pdn,
@@ -135,7 +135,7 @@ int pseries_set_root_bus_speed(struct pci_host_bridge *bridge)
if (rc) {
pr_debug("no ibm,pcie-link-speed-stats property\n");
- return 0;
+ return;
}
switch (pcie_link_speed_stats[0]) {
@@ -168,5 +168,5 @@ int pseries_set_root_bus_speed(struct pci_host_bridge *bridge)
break;
}
- return 0;
+ return;
}
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index 5d0be3a..9aa9c13 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -63,7 +63,7 @@ extern int dlpar_detach_node(struct device_node *);
/* PCI root bridge prepare function override for pseries */
struct pci_host_bridge;
-int pseries_set_root_bus_speed(struct pci_host_bridge *bridge);
+void pseries_set_root_bus_speed(struct pci_host_bridge *bridge);
unsigned long pseries_memory_block_size(void);
--
1.7.1
next prev parent reply other threads:[~2015-03-06 9:33 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
2015-03-06 9:33 ` [PATCH v5 01/29] PCI: Rip out pci_bus_add_devices() from pci_scan_bus() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 02/29] PCI: Rip out pci_bus_add_devices() from pci_scan_root_bus() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 03/29] xen/PCI: Don't use deprecated function pci_scan_bus_parented() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 04/29] PCI: Remove deprecated pci_scan_bus_parented() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 05/29] PCI: Combine PCI domain and bus number in u32 arg Yijing Wang
2015-03-06 9:33 ` [PATCH v5 06/29] PCI: Pass PCI domain number combined with root bus number Yijing Wang
2015-03-06 9:33 ` [PATCH v5 07/29] PCI: Introduce pci_host_assign_domain_nr() to assign domain Yijing Wang
2015-03-06 9:33 ` [PATCH v5 08/29] PCI: Separate pci_host_bridge creation out of pci_create_root_bus() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 09/29] PCI: Introduce pci_host_bridge_list to manage host bridges Yijing Wang
2015-03-06 9:33 ` [PATCH v5 10/29] PCI: Save sysdata in pci_host_bridge drvdata Yijing Wang
2015-03-06 9:33 ` [PATCH v5 11/29] PCI: Introduce pci_host_bridge_ops to support host specific operations Yijing Wang
2015-03-06 9:33 ` [PATCH v5 12/29] PCI: Introduce new scan function pci_scan_host_bridge() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 13/29] x86/PCI: Refine pci_acpi_scan_root() with generic pci_host_bridge Yijing Wang
2015-03-06 9:33 ` [PATCH v5 14/29] ia64/PCI: " Yijing Wang
2015-03-06 9:33 ` [PATCH v5 15/29] powerpc/pci: Rename pcibios_root_bridge_prepare() Yijing Wang
2015-03-06 9:33 ` Yijing Wang [this message]
2015-03-06 14:19 ` [PATCH v5 16/29] powerpc/pci: Use pci_scan_host_bridge() for simplicity Rob Herring
2015-03-09 2:47 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 17/29] PCI: Remove weak pcibios_root_bridge_prepare() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 18/29] sparc/PCI: Claim bus resources before pci_bus_add_devices() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 19/29] sparc/PCI: Use pci_scan_host_bridge() for simplicity Yijing Wang
2015-03-06 9:33 ` [PATCH v5 20/29] PCI: Introduce pci_bus_child_max_busnr() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 21/29] parisc/PCI: Use pci_scan_root_bus() for simplicity Yijing Wang
2015-03-06 9:33 ` [PATCH v5 22/29] PCI/mvebu: Use pci_common_init_dev() to simplify code Yijing Wang
2015-03-06 9:33 ` [PATCH v5 23/29] PCI/tegra: Remove redundant tegra_pcie_scan_bus() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 24/29] PCI/designware: Use pci_scan_root_bus() for simplicity Yijing Wang
2015-03-06 9:33 ` [PATCH v5 25/29] PCI/xgene: Use pci_scan_root_bus() instead of pci_create_root_bus() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 26/29] PCI: Rename __pci_create_root_bus() to pci_create_root_bus() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 27/29] PCI: Export find_pci_host_bridge() and rename to pci_find_host_bridge() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 28/29] PCI: Remove platform specific pci_domain_nr() Yijing Wang
2015-03-06 9:33 ` [PATCH v5 29/29] PCI: Remove pci_bus_assign_domain_nr() Yijing Wang
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