diff mbox

[v5,16/29] powerpc/pci: Use pci_scan_host_bridge() for simplicity

Message ID 1425634426-437-17-git-send-email-wangyijing@huawei.com (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Yijing Wang March 6, 2015, 9:33 a.m. UTC
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@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(-)

Comments

Rob Herring March 6, 2015, 2:19 p.m. UTC | #1
On Fri, Mar 6, 2015 at 3:33 AM, Yijing Wang <wangyijing@huawei.com> wrote:
> 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@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);

Shouldn't this be part of patch 15?

Rob
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Yijing Wang March 9, 2015, 2:47 a.m. UTC | #2
On 2015/3/6 22:19, Rob Herring wrote:
> On Fri, Mar 6, 2015 at 3:33 AM, Yijing Wang <wangyijing@huawei.com> wrote:
>> 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@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);
> 
> Shouldn't this be part of patch 15?

Hi Rob, I didn't merge this to patch 15 for building happy for patch 15.

> 
> Rob
> 
> .
>
diff mbox

Patch

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);