* [PATCH v5 01/29] PCI: Rip out pci_bus_add_devices() from pci_scan_bus()
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 ` 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
` (27 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Pci_bus_add_devices() should not be placed in pci_scan_bus().
Now pci device will be added to driver core once its
creation. All things left in pci_bus_add_devices() are
driver attachment and other trivial sysfs things.
Pci_scan_bus() should be the function responsible for
scanning PCI devices, not including driver attachment.
Other, some callers(m68k,unicore32,alpha) of pci_scan_bus()
will call pci_bus_size_bridges() and pci_bus_assign_resources()
after pci_scan_bus().
E.g.
In m68k
mcf_pci_init()
pci_scan_bus()
...
pci_bus_add_devices() --- try to attach driver
pci_fixup_irqs()
pci_bus_size_bridges()
pci_bus_assign_resources()
Above code flow make pci scan logic obscure, resources should
be assigned correctly before attaching driver. Because
pci_scan_bus() mostly be called in system boot path, when
before drivers are loaded(in module_init), so no pci scan
issues will occur. Most pci_scan_bus() callers additionally
call pci_bus_size_bridges() and pci_bus_assign_resources()
after pci_scan_bus(), we could rip out pci_bus_add_devices()
for better code readability. After applied this patch,
pci_scan_bus() should be used like:
pci_scan_bus() (mandatory)
pci_fixup_irqs() (optional)
pci_bus_size_bridges() (optional)
pci_pci_bus_assign_resources() (optional)
pci_bus_add_devices() (mandatory)
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Geert Uytterhoeven <geert@linux-m68k.org>
CC: Guan Xuetao <gxt@mprc.pku.edu.cn>
CC: Richard Henderson <rth@twiddle.net>
CC: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
CC: Matt Turner <mattst88@gmail.com>
CC: linux-alpha at vger.kernel.org
CC: linux-m68k at lists.linux-m68k.org
CC: sparclinux at vger.kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
arch/alpha/kernel/sys_nautilus.c | 4 ++++
arch/m68k/coldfire/pci.c | 1 +
arch/sparc/kernel/pcic.c | 3 +++
arch/unicore32/kernel/pci.c | 11 +++--------
drivers/pci/hotplug/ibmphp_core.c | 8 ++++++--
drivers/pci/probe.c | 1 -
6 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c
index 837c0fa..700686d 100644
--- a/arch/alpha/kernel/sys_nautilus.c
+++ b/arch/alpha/kernel/sys_nautilus.c
@@ -207,6 +207,9 @@ nautilus_init_pci(void)
/* Scan our single hose. */
bus = pci_scan_bus(0, alpha_mv.pci_ops, hose);
+ if (!bus)
+ return;
+
hose->bus = bus;
pcibios_claim_one_bus(bus);
@@ -253,6 +256,7 @@ nautilus_init_pci(void)
for the root bus, so just clear it. */
bus->self = NULL;
pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq);
+ pci_bus_add_devices(bus);
}
/*
diff --git a/arch/m68k/coldfire/pci.c b/arch/m68k/coldfire/pci.c
index df96792..d45f087 100644
--- a/arch/m68k/coldfire/pci.c
+++ b/arch/m68k/coldfire/pci.c
@@ -319,6 +319,7 @@ static int __init mcf_pci_init(void)
pci_fixup_irqs(pci_common_swizzle, mcf_pci_map_irq);
pci_bus_size_bridges(rootbus);
pci_bus_assign_resources(rootbus);
+ pci_bus_add_devices(rootbus);
return 0;
}
diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
index 6cc78c2..0f4dc6b 100644
--- a/arch/sparc/kernel/pcic.c
+++ b/arch/sparc/kernel/pcic.c
@@ -391,12 +391,15 @@ static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic)
struct linux_pbm_info *pbm = &pcic->pbm;
pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, &pcic_ops, pbm);
+ if (!pbm->pci_bus)
+ return;
#if 0 /* deadwood transplanted from sparc64 */
pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node);
pci_record_assignments(pbm, pbm->pci_bus);
pci_assign_unassigned(pbm, pbm->pci_bus);
pci_fixup_irq(pbm, pbm->pci_bus);
#endif
+ pci_bus_add_devices(pbm->pci_bus);
}
/*
diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c
index 374a055..3d82024 100644
--- a/arch/unicore32/kernel/pci.c
+++ b/arch/unicore32/kernel/pci.c
@@ -266,17 +266,12 @@ static int __init pci_common_init(void)
pci_fixup_irqs(pci_common_swizzle, pci_puv3_map_irq);
if (!pci_has_flag(PCI_PROBE_ONLY)) {
- /*
- * Size the bridge windows.
- */
+ /* Size the bridge windows. */
pci_bus_size_bridges(puv3_bus);
-
- /*
- * Assign resources.
- */
+ /* Assign resources. */
pci_bus_assign_resources(puv3_bus);
}
-
+ pci_bus_add_devices(puv3_bus);
return 0;
}
subsys_initcall(pci_common_init);
diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c
index 96c5c72..1530247 100644
--- a/drivers/pci/hotplug/ibmphp_core.c
+++ b/drivers/pci/hotplug/ibmphp_core.c
@@ -738,7 +738,7 @@ static void ibm_unconfigure_device(struct pci_func *func)
*/
static u8 bus_structure_fixup(u8 busno)
{
- struct pci_bus *bus;
+ struct pci_bus *bus, *b;
struct pci_dev *dev;
u16 l;
@@ -765,7 +765,11 @@ static u8 bus_structure_fixup(u8 busno)
(l != 0x0000) && (l != 0xffff)) {
debug("%s - Inside bus_structure_fixup()\n",
__func__);
- pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
+ b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
+ if (!b)
+ continue;
+
+ pci_bus_add_devices(b);
break;
}
}
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 8d2f400..88604f2 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2123,7 +2123,6 @@ struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
b = pci_create_root_bus(NULL, bus, ops, sysdata, &resources);
if (b) {
pci_scan_child_bus(b);
- pci_bus_add_devices(b);
} else {
pci_free_resource_list(&resources);
}
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 02/29] PCI: Rip out pci_bus_add_devices() from pci_scan_root_bus()
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 03/29] xen/PCI: Don't use deprecated function pci_scan_bus_parented() Yijing Wang
` (26 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Just like pci_scan_bus(), we also should rip out
pci_bus_add_devices() from pci_scan_root_bus().
Lots platforms first call pci_scan_root_bus(), but
after that, they call pci_bus_size_bridges() and
pci_bus_assign_resources(). Place pci_bus_add_devices()
in pci_scan_root_bus() hurts PCI scan logic.
For arm hw_pci->scan() functions which call
pci_scan_root_bus(), it's no need to change anything,
because pci_bus_add_devices() will be called later
in pci_common_init_dev().
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Richard Henderson <rth@twiddle.net>
CC: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
CC: Matt Turner <mattst88@gmail.com>
CC: David Howells <dhowells@redhat.com>
CC: Tony Luck <tony.luck@intel.com>
CC: Michal Simek <monstr@monstr.eu>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
CC: Sebastian Ott <sebott@linux.vnet.ibm.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Chris Metcalf <cmetcalf@ezchip.com>
CC: Chris Zankel <chris@zankel.net>
CC: Max Filippov <jcmvbkbc@gmail.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: linux-alpha at vger.kernel.org
CC: linux-kernel at vger.kernel.org
CC: linux-mips at linux-mips.org
CC: linux-am33-list at redhat.com
CC: linux-s390 at vger.kernel.org
CC: linux-sh at vger.kernel.org
CC: sparclinux at vger.kernel.org
CC: linux-xtensa at linux-xtensa.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
arch/alpha/kernel/pci.c | 9 ++++++++-
arch/frv/mb93090-mb00/pci-vdk.c | 6 +++++-
arch/ia64/sn/kernel/io_init.c | 2 ++
arch/microblaze/pci/pci-common.c | 3 +++
arch/mips/pci/pci.c | 1 +
arch/mn10300/unit-asb2305/pci.c | 7 ++++++-
arch/s390/pci/pci.c | 2 +-
arch/sh/drivers/pci/pci.c | 1 +
arch/sparc/kernel/leon_pci.c | 1 +
arch/tile/kernel/pci.c | 2 ++
arch/tile/kernel/pci_gx.c | 2 ++
arch/x86/pci/common.c | 1 +
arch/xtensa/kernel/pci.c | 11 +++++++++--
drivers/pci/probe.c | 1 -
14 files changed, 42 insertions(+), 7 deletions(-)
diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 98a1525..5c845ad 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -312,7 +312,7 @@ common_init_pci(void)
{
struct pci_controller *hose;
struct list_head resources;
- struct pci_bus *bus;
+ struct pci_bus *bus, *root_bus;
int next_busno;
int need_domain_info = 0;
u32 pci_mem_end;
@@ -338,6 +338,8 @@ common_init_pci(void)
bus = pci_scan_root_bus(NULL, next_busno, alpha_mv.pci_ops,
hose, &resources);
+ if (!bus)
+ continue;
hose->bus = bus;
hose->need_domain_info = need_domain_info;
next_busno = bus->busn_res.end + 1;
@@ -353,6 +355,11 @@ common_init_pci(void)
pci_assign_unassigned_resources();
pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq);
+ for (hose = hose_head; hose; hose = hose->next) {
+ root_bus = hose->bus;
+ if (root_bus)
+ pci_bus_add_devices(root_bus);
+ }
}
diff --git a/arch/frv/mb93090-mb00/pci-vdk.c b/arch/frv/mb93090-mb00/pci-vdk.c
index b073f4d..f211839 100644
--- a/arch/frv/mb93090-mb00/pci-vdk.c
+++ b/arch/frv/mb93090-mb00/pci-vdk.c
@@ -316,6 +316,7 @@ void pcibios_fixup_bus(struct pci_bus *bus)
int __init pcibios_init(void)
{
+ struct pci_bus *bus;
struct pci_ops *dir = NULL;
LIST_HEAD(resources);
@@ -383,12 +384,15 @@ int __init pcibios_init(void)
printk("PCI: Probing PCI hardware\n");
pci_add_resource(&resources, &pci_ioport_resource);
pci_add_resource(&resources, &pci_iomem_resource);
- pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources);
+ bus = pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources);
pcibios_irq_init();
pcibios_fixup_irqs();
pcibios_resource_survey();
+ if (!bus)
+ return 0;
+ pci_bus_add_devices(bus);
return 0;
}
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 0b5ce82..1be65eb 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -271,7 +271,9 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
if (bus == NULL) {
kfree(res);
kfree(controller);
+ return;
}
+ pci_bus_add_devices(bus);
}
/*
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index 48528fb..6d8d173 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -1382,6 +1382,9 @@ static int __init pcibios_init(void)
/* Call common code to handle resource allocation */
pcibios_resource_survey();
+ list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
+ if (hose->bus)
+ pci_bus_add_devices(hose->bus);
return 0;
}
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index 1bf60b1..9eb54b5 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -114,6 +114,7 @@ static void pcibios_scanbus(struct pci_controller *hose)
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
}
+ pci_bus_add_devices(bus);
}
}
diff --git a/arch/mn10300/unit-asb2305/pci.c b/arch/mn10300/unit-asb2305/pci.c
index 613ca1e..cde5e05 100644
--- a/arch/mn10300/unit-asb2305/pci.c
+++ b/arch/mn10300/unit-asb2305/pci.c
@@ -340,6 +340,7 @@ void pcibios_fixup_bus(struct pci_bus *bus)
*/
static int __init pcibios_init(void)
{
+ struct pci_bus *bus;
resource_size_t io_offset, mem_offset;
LIST_HEAD(resources);
@@ -371,11 +372,15 @@ static int __init pcibios_init(void)
pci_add_resource_offset(&resources, &pci_ioport_resource, io_offset);
pci_add_resource_offset(&resources, &pci_iomem_resource, mem_offset);
- pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources);
+ bus = pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources);
pcibios_irq_init();
pcibios_fixup_irqs();
pcibios_resource_survey();
+ if (!bus)
+ return 0;
+
+ pci_bus_add_devices(bus);
return 0;
}
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 753a567..a2a7391 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -776,8 +776,8 @@ static int zpci_scan_bus(struct zpci_dev *zdev)
zpci_cleanup_bus_resources(zdev);
return -EIO;
}
-
zdev->bus->max_bus_speed = zdev->max_bus_speed;
+ pci_bus_add_devices(zdev->bus);
return 0;
}
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index 1bc09ee..efc1051 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -69,6 +69,7 @@ static void pcibios_scanbus(struct pci_channel *hose)
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
+ pci_bus_add_devices(bus);
} else {
pci_free_resource_list(&resources);
}
diff --git a/arch/sparc/kernel/leon_pci.c b/arch/sparc/kernel/leon_pci.c
index 899b720..2971076 100644
--- a/arch/sparc/kernel/leon_pci.c
+++ b/arch/sparc/kernel/leon_pci.c
@@ -40,6 +40,7 @@ void leon_pci_init(struct platform_device *ofdev, struct leon_pci_info *info)
/* Assign devices with resources */
pci_assign_unassigned_resources();
+ pci_bus_add_devices(root_bus);
} else {
pci_free_resource_list(&resources);
}
diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
index 325df47..9475a74 100644
--- a/arch/tile/kernel/pci.c
+++ b/arch/tile/kernel/pci.c
@@ -339,6 +339,8 @@ int __init pcibios_init(void)
struct pci_bus *next_bus;
struct pci_dev *dev;
+ pci_bus_add_devices(root_bus);
+
list_for_each_entry(dev, &root_bus->devices, bus_list) {
/*
* Find the PCI host controller, ie. the 1st
diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c
index 2c95f37..b1df847 100644
--- a/arch/tile/kernel/pci_gx.c
+++ b/arch/tile/kernel/pci_gx.c
@@ -1030,6 +1030,8 @@ int __init pcibios_init(void)
alloc_mem_map_failed:
break;
}
+
+ pci_bus_add_devices(root_bus);
}
return 0;
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 3d2612b..0cbc723 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -491,6 +491,7 @@ void pcibios_scan_root(int busnum)
pci_free_resource_list(&resources);
kfree(sd);
}
+ pci_bus_add_devices(bus);
}
void __init pcibios_set_cache_line_size(void)
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index 5b34033..140e2fd 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -174,7 +174,7 @@ static int __init pcibios_init(void)
struct pci_controller *pci_ctrl;
struct list_head resources;
struct pci_bus *bus;
- int next_busno = 0;
+ int ret, next_busno = 0;
printk("PCI: Probing PCI hardware\n");
@@ -185,14 +185,21 @@ static int __init pcibios_init(void)
pci_controller_apertures(pci_ctrl, &resources);
bus = pci_scan_root_bus(NULL, pci_ctrl->first_busno,
pci_ctrl->ops, pci_ctrl, &resources);
+ if (!bus)
+ continue;
+
pci_ctrl->bus = bus;
pci_ctrl->last_busno = bus->busn_res.end;
if (next_busno <= pci_ctrl->last_busno)
next_busno = pci_ctrl->last_busno+1;
}
pci_bus_count = next_busno;
+ ret = platform_pcibios_fixup();
+ for (pci_ctrl = pci_ctrl_head; pci_ctrl; pci_ctrl = pci_ctrl->next)
+ if (pci_ctrl->bus)
+ pci_bus_add_devices(pci_ctrl->bus);
- return platform_pcibios_fixup();
+ return ret;
}
subsys_initcall(pcibios_init);
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 88604f2..8ef0375 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2087,7 +2087,6 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
if (!found)
pci_bus_update_busn_res_end(b, max);
- pci_bus_add_devices(b);
return b;
}
EXPORT_SYMBOL(pci_scan_root_bus);
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 03/29] xen/PCI: Don't use deprecated function pci_scan_bus_parented()
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 04/29] PCI: Remove deprecated pci_scan_bus_parented() Yijing Wang
` (25 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
From: Arnd Bergmann <arnd@arndb.de>
Use pci_scan_root_bus() instead of deprecated function
pci_scan_bus_parented().
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: xen-devel at lists.xenproject.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/xen-pcifront.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index b1ffebe..7057930 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -446,6 +446,7 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
unsigned int domain, unsigned int bus)
{
struct pci_bus *b;
+ LIST_HEAD(resources);
struct pcifront_sd *sd = NULL;
struct pci_bus_entry *bus_entry = NULL;
int err = 0;
@@ -470,17 +471,21 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
err = -ENOMEM;
goto err_out;
}
+ pci_add_resource(&resources, &ioport_resource);
+ pci_add_resource(&resources, &iomem_resource);
+ pci_add_resource(&resources, &busn_resource);
pcifront_init_sd(sd, domain, bus, pdev);
pci_lock_rescan_remove();
- b = pci_scan_bus_parented(&pdev->xdev->dev, bus,
- &pcifront_bus_ops, sd);
+ b = pci_scan_root_bus(&pdev->xdev->dev, bus,
+ &pcifront_bus_ops, sd, &resources);
if (!b) {
dev_err(&pdev->xdev->dev,
"Error creating PCI Frontend Bus!\n");
err = -ENOMEM;
pci_unlock_rescan_remove();
+ pci_free_resource_list(&resources);
goto err_out;
}
@@ -488,7 +493,7 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
list_add(&bus_entry->list, &pdev->root_buses);
- /* pci_scan_bus_parented skips devices which do not have a have
+ /* pci_scan_root_bus skips devices which do not have a
* devfn==0. The pcifront_scan_bus enumerates all devfn. */
err = pcifront_scan_bus(pdev, domain, bus, b);
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 04/29] PCI: Remove deprecated pci_scan_bus_parented()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (2 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 05/29] PCI: Combine PCI domain and bus number in u32 arg Yijing Wang
` (24 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
No one uses pci_scan_bus_parented() any more,
remove it.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/probe.c | 19 -------------------
include/linux/pci.h | 2 --
2 files changed, 0 insertions(+), 21 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 8ef0375..699a238 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2091,25 +2091,6 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
}
EXPORT_SYMBOL(pci_scan_root_bus);
-/* Deprecated; use pci_scan_root_bus() instead */
-struct pci_bus *pci_scan_bus_parented(struct device *parent,
- int bus, struct pci_ops *ops, void *sysdata)
-{
- LIST_HEAD(resources);
- struct pci_bus *b;
-
- pci_add_resource(&resources, &ioport_resource);
- pci_add_resource(&resources, &iomem_resource);
- pci_add_resource(&resources, &busn_resource);
- b = pci_create_root_bus(parent, bus, ops, sysdata, &resources);
- if (b)
- pci_scan_child_bus(b);
- else
- pci_free_resource_list(&resources);
- return b;
-}
-EXPORT_SYMBOL(pci_scan_bus_parented);
-
struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
void *sysdata)
{
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 211e9da..36effb8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -769,8 +769,6 @@ void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
void pcibios_scan_specific_bus(int busn);
struct pci_bus *pci_find_bus(int domain, int busnr);
void pci_bus_add_devices(const struct pci_bus *bus);
-struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
- struct pci_ops *ops, void *sysdata);
struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata,
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 05/29] PCI: Combine PCI domain and bus number in u32 arg
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (3 preceding siblings ...)
2015-03-06 9:33 ` [PATCH v5 04/29] PCI: Remove deprecated pci_scan_bus_parented() Yijing Wang
@ 2015-03-06 9:33 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 06/29] PCI: Pass PCI domain number combined with root bus number Yijing Wang
` (23 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Currently, we use int type for bus number in
pci_create_root_bus(), pci_scan_root_bus() and
pci_scan_bus_legacy. Because PCI bus number
always <= 255, so we could change the bus number
argument type to u32, and combine PCI domain and
bus number in one. Also add a domain member in
pci_host_bridge to save domain number. Finally,
we could eliminate lots of the platform specific
pci_domain_nr() in the last of the series.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/probe.c | 16 +++++++++-------
include/linux/pci.h | 7 ++++---
include/uapi/linux/pci.h | 3 +++
3 files changed, 16 insertions(+), 10 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 699a238..e426354 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1889,7 +1889,7 @@ void __weak pcibios_remove_bus(struct pci_bus *bus)
{
}
-struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
+struct pci_bus *pci_create_root_bus(struct device *parent, u32 db,
struct pci_ops *ops, void *sysdata, struct list_head *resources)
{
int error;
@@ -1900,6 +1900,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
resource_size_t offset;
char bus_addr[64];
char *fmt;
+ u8 bus = PCI_BUSNUM(db);
b = pci_alloc_bus(NULL);
if (!b)
@@ -1920,6 +1921,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
if (!bridge)
goto err_out;
+ bridge->domain = PCI_DOMAIN(db);
bridge->dev.parent = parent;
bridge->dev.release = pci_release_host_bridge_dev;
dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus);
@@ -2057,7 +2059,7 @@ void pci_bus_release_busn_res(struct pci_bus *b)
res, ret ? "can not be" : "is");
}
-struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
+struct pci_bus *pci_scan_root_bus(struct device *parent, u32 db,
struct pci_ops *ops, void *sysdata, struct list_head *resources)
{
struct resource_entry *window;
@@ -2071,15 +2073,15 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
break;
}
- b = pci_create_root_bus(parent, bus, ops, sysdata, resources);
+ b = pci_create_root_bus(parent, db, ops, sysdata, resources);
if (!b)
return NULL;
if (!found) {
dev_info(&b->dev,
"No busn resource found for root bus, will use [bus %02x-ff]\n",
- bus);
- pci_bus_insert_busn_res(b, bus, 255);
+ PCI_BUSNUM(db));
+ pci_bus_insert_busn_res(b, PCI_BUSNUM(db), 255);
}
max = pci_scan_child_bus(b);
@@ -2091,7 +2093,7 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
}
EXPORT_SYMBOL(pci_scan_root_bus);
-struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
+struct pci_bus *pci_scan_bus(u32 db, struct pci_ops *ops,
void *sysdata)
{
LIST_HEAD(resources);
@@ -2100,7 +2102,7 @@ struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
pci_add_resource(&resources, &ioport_resource);
pci_add_resource(&resources, &iomem_resource);
pci_add_resource(&resources, &busn_resource);
- b = pci_create_root_bus(NULL, bus, ops, sysdata, &resources);
+ b = pci_create_root_bus(NULL, db, ops, sysdata, &resources);
if (b) {
pci_scan_child_bus(b);
} else {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 36effb8..8b3d245 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -401,6 +401,7 @@ static inline int pci_channel_offline(struct pci_dev *pdev)
}
struct pci_host_bridge {
+ u16 domain;
struct device dev;
struct pci_bus *bus; /* root bus */
struct list_head windows; /* resource_entry */
@@ -769,14 +770,14 @@ void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
void pcibios_scan_specific_bus(int busn);
struct pci_bus *pci_find_bus(int domain, int busnr);
void pci_bus_add_devices(const struct pci_bus *bus);
-struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
-struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
+struct pci_bus *pci_scan_bus(u32 dombus, struct pci_ops *ops, void *sysdata);
+struct pci_bus *pci_create_root_bus(struct device *parent, u32 dombus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
void pci_bus_release_busn_res(struct pci_bus *b);
-struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
+struct pci_bus *pci_scan_root_bus(struct device *parent, u32 dombus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
diff --git a/include/uapi/linux/pci.h b/include/uapi/linux/pci.h
index 3c292bc..89c6f15 100644
--- a/include/uapi/linux/pci.h
+++ b/include/uapi/linux/pci.h
@@ -30,6 +30,9 @@
#define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
#define PCI_FUNC(devfn) ((devfn) & 0x07)
+#define PCI_DOMAIN(db) ((db) >> 16)
+#define PCI_BUSNUM(db) ((db) & 0xffff)
+#define PCI_DOMBUS(domain, bus) (((domain) << 16) | (bus))
/* Ioctls for /proc/bus/pci/X/Y nodes. */
#define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 06/29] PCI: Pass PCI domain number combined with root bus number
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (4 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 07/29] PCI: Introduce pci_host_assign_domain_nr() to assign domain Yijing Wang
` (22 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Now we could pass PCI domain combined with bus number
in u32 argu. Because in arm/arm64, PCI domain number
is assigned by pci_bus_assign_domain_nr(). So we leave
pci_scan_root_bus() and pci_create_root_bus() in arm/arm64
unchanged. A new function pci_host_assign_domain_nr()
will be introduced for arm/arm64 to assign domain number
in later patch.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Richard Henderson <rth@twiddle.net>
CC: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
CC: Matt Turner <mattst88@gmail.com>
CC: Tony Luck <tony.luck@intel.com>
CC: Fenghua Yu <fenghua.yu@intel.com>
CC: Michal Simek <monstr@monstr.eu>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Sebastian Ott <sebott@linux.vnet.ibm.com>
CC: Gerald Schaefer <gerald.schaefer@de.ibm.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Chris Metcalf <cmetcalf@ezchip.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: linux-alpha at vger.kernel.org
CC: linux-kernel at vger.kernel.org
CC: linux-ia64 at vger.kernel.org
CC: linux-mips at linux-mips.org
CC: linuxppc-dev at lists.ozlabs.org
CC: linux-s390 at vger.kernel.org
CC: linux-sh at vger.kernel.org
CC: sparclinux at vger.kernel.org
CC: xen-devel at lists.xenproject.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
arch/alpha/kernel/pci.c | 5 +++--
arch/alpha/kernel/sys_nautilus.c | 4 ++--
arch/ia64/pci/pci.c | 4 ++--
arch/ia64/sn/kernel/io_init.c | 5 +++--
arch/microblaze/pci/pci-common.c | 5 +++--
arch/mips/pci/pci.c | 4 ++--
arch/powerpc/kernel/pci-common.c | 5 +++--
arch/s390/pci/pci.c | 5 +++--
arch/sh/drivers/pci/pci.c | 5 +++--
arch/sparc/kernel/pci.c | 5 +++--
arch/tile/kernel/pci.c | 5 +++--
arch/tile/kernel/pci_gx.c | 5 +++--
arch/x86/pci/acpi.c | 7 ++++---
arch/x86/pci/common.c | 3 ++-
drivers/pci/xen-pcifront.c | 5 +++--
15 files changed, 42 insertions(+), 30 deletions(-)
diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 5c845ad..deb0a36 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -336,8 +336,9 @@ common_init_pci(void)
pci_add_resource_offset(&resources, hose->mem_space,
hose->mem_space->start);
- bus = pci_scan_root_bus(NULL, next_busno, alpha_mv.pci_ops,
- hose, &resources);
+ bus = pci_scan_root_bus(NULL,
+ PCI_DOMBUS(hose->index, next_busno),
+ alpha_mv.pci_ops, hose, &resources);
if (!bus)
continue;
hose->bus = bus;
diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c
index 700686d..be0bbeb 100644
--- a/arch/alpha/kernel/sys_nautilus.c
+++ b/arch/alpha/kernel/sys_nautilus.c
@@ -206,10 +206,10 @@ nautilus_init_pci(void)
unsigned long memtop = max_low_pfn << PAGE_SHIFT;
/* Scan our single hose. */
- bus = pci_scan_bus(0, alpha_mv.pci_ops, hose);
+ bus = pci_scan_bus(PCI_DOMBUS(hose->index, 0),
+ alpha_mv.pci_ops, hose);
if (!bus)
return;
-
hose->bus = bus;
pcibios_claim_one_bus(bus);
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 48cc657..675749f 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -465,8 +465,8 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
* should handle the case here, but it appears that IA64 hasn't
* such quirk. So we just ignore the case now.
*/
- pbus = pci_create_root_bus(NULL, bus, &pci_root_ops, controller,
- &info->resources);
+ pbus = pci_create_root_bus(NULL, PCI_DOMBUS(domain, bus),
+ &pci_root_ops, controller, &info->resources);
if (!pbus) {
pci_free_resource_list(&info->resources);
__release_pci_root_info(info);
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 1be65eb..7e0b7f9 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -266,8 +266,9 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
pci_add_resource_offset(&resources, &res[1],
prom_bussoft_ptr->bs_legacy_mem);
- bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, controller,
- &resources);
+ bus = pci_scan_root_bus(NULL,
+ PCI_DOMBUS(controller->segment, busnum),
+ &pci_root_ops, controller, &resources);
if (bus == NULL) {
kfree(res);
kfree(controller);
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index 6d8d173..34a32ec 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -1350,8 +1350,9 @@ static void pcibios_scan_phb(struct pci_controller *hose)
pcibios_setup_phb_resources(hose, &resources);
- bus = pci_scan_root_bus(hose->parent, hose->first_busno,
- hose->ops, hose, &resources);
+ bus = pci_scan_root_bus(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->global_number);
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index 9eb54b5..86f8d2b 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -92,8 +92,8 @@ static void pcibios_scanbus(struct pci_controller *hose)
pci_add_resource_offset(&resources,
hose->mem_resource, hose->mem_offset);
pci_add_resource_offset(&resources, hose->io_resource, hose->io_offset);
- bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
- &resources);
+ bus = pci_scan_root_bus(NULL, PCI_DOMBUS(hose->index, next_busno),
+ hose->pci_ops, hose, &resources);
if (!bus)
pci_free_resource_list(&resources);
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 2a525c9..a467aca 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1612,8 +1612,9 @@ 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, hose->first_busno,
- hose->ops, hose, &resources);
+ bus = pci_create_root_bus(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->global_number);
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index a2a7391..20e662f 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -770,8 +770,9 @@ static int zpci_scan_bus(struct zpci_dev *zdev)
if (ret)
return ret;
- zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
- zdev, &resources);
+ zdev->bus = pci_scan_root_bus(NULL,
+ PCI_DOMBUS(zdev->domain, ZPCI_BUS_NR), &pci_root_ops,
+ zdev, &resources);
if (!zdev->bus) {
zpci_cleanup_bus_resources(zdev);
return -EIO;
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index efc1051..116f80f 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -52,8 +52,9 @@ static void pcibios_scanbus(struct pci_channel *hose)
pci_add_resource_offset(&resources, res, offset);
}
- bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
- &resources);
+ bus = pci_scan_root_bus(NULL,
+ PCI_DOMBUS(hose->index, next_busno),
+ hose->pci_ops, hose, &resources);
hose->bus = bus;
need_domain_info = need_domain_info || hose->index;
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 9ce5afe..838fe1e 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -667,8 +667,9 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
pbm->busn.end = pbm->pci_last_busno;
pbm->busn.flags = IORESOURCE_BUS;
pci_add_resource(&resources, &pbm->busn);
- bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops,
- pbm, &resources);
+ bus = pci_create_root_bus(parent,
+ PCI_DOMBUS(pbm->index, pbm->pci_first_busno),
+ pbm->pci_ops, pbm, &resources);
if (!bus) {
printk(KERN_ERR "Failed to create bus for %s\n",
node->full_name);
diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
index 9475a74..25b0d9b 100644
--- a/arch/tile/kernel/pci.c
+++ b/arch/tile/kernel/pci.c
@@ -306,8 +306,9 @@ int __init pcibios_init(void)
pci_add_resource(&resources, &ioport_resource);
pci_add_resource(&resources, &iomem_resource);
- bus = pci_scan_root_bus(NULL, 0, controller->ops,
- controller, &resources);
+ bus = pci_scan_root_bus(NULL,
+ PCI_DOMBUS(controller->index, 0),
+ controller->ops, controller, &resources);
controller->root_bus = bus;
controller->last_busno = bus->busn_res.end;
}
diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c
index b1df847..f6f41f3 100644
--- a/arch/tile/kernel/pci_gx.c
+++ b/arch/tile/kernel/pci_gx.c
@@ -881,8 +881,9 @@ int __init pcibios_init(void)
controller->mem_offset);
pci_add_resource(&resources, &controller->io_space);
controller->first_busno = next_busno;
- bus = pci_scan_root_bus(NULL, next_busno, controller->ops,
- controller, &resources);
+ bus = pci_scan_root_bus(NULL,
+ PCI_DOMBUS(controller->index, next_busno),
+ controller->ops, controller, &resources);
controller->root_bus = bus;
next_busno = bus->busn_res.end + 1;
}
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 6ac2738..ad0e926 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -424,9 +424,10 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
}
if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
- (u8)root->secondary.end, root->mcfg_addr))
- bus = pci_create_root_bus(NULL, busnum, &pci_root_ops,
- sd, &resources);
+ (u8)root->secondary.end, root->mcfg_addr))
+ bus = pci_create_root_bus(NULL,
+ PCI_DOMBUS(domain, busnum), &pci_root_ops,
+ sd, &resources);
if (bus) {
pci_scan_child_bus(bus);
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 0cbc723..0160280 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -486,7 +486,8 @@ void pcibios_scan_root(int busnum)
sd->node = x86_pci_root_bus_node(busnum);
x86_pci_root_bus_resources(busnum, &resources);
printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
- bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, sd, &resources);
+ bus = pci_scan_root_bus(NULL, PCI_DOMBUS(0, busnum),
+ &pci_root_ops, sd, &resources);
if (!bus) {
pci_free_resource_list(&resources);
kfree(sd);
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 7057930..d5dfb70 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -478,8 +478,9 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
pci_lock_rescan_remove();
- b = pci_scan_root_bus(&pdev->xdev->dev, bus,
- &pcifront_bus_ops, sd, &resources);
+ b = pci_scan_root_bus(&pdev->xdev->dev,
+ PCI_DOMBUS(sd->domain, bus),
+ &pcifront_bus_ops, sd, &resources);
if (!b) {
dev_err(&pdev->xdev->dev,
"Error creating PCI Frontend Bus!\n");
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 07/29] PCI: Introduce pci_host_assign_domain_nr() to assign domain
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (5 preceding siblings ...)
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 ` 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
` (21 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Introduce pci_host_assign_domain_nr() to assign domain
number for pci_host_bridge. Later we will remove
pci_bus_assign_domain_nr().
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/pci.c | 20 +++++++++++++++-----
include/linux/pci.h | 4 ++++
2 files changed, 19 insertions(+), 5 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 81f06e8..c49eec1 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4501,10 +4501,10 @@ int pci_get_new_domain_nr(void)
}
#ifdef CONFIG_PCI_DOMAINS_GENERIC
-void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
+static int pci_assign_domain_nr(struct device *dev)
{
static int use_dt_domains = -1;
- int domain = of_get_pci_domain_nr(parent->of_node);
+ int domain = of_get_pci_domain_nr(dev->of_node);
/*
* Check DT domain and use_dt_domains values.
@@ -4538,12 +4538,22 @@ void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
use_dt_domains = 0;
domain = pci_get_new_domain_nr();
} else {
- dev_err(parent, "Node %s has inconsistent \"linux,pci-domain\" property in DT\n",
- parent->of_node->full_name);
+ dev_err(dev, "Node %s has inconsistent \"linux,pci-domain\" property in DT\n",
+ dev->of_node->full_name);
domain = -1;
}
- bus->domain_nr = domain;
+ return domain;
+}
+
+void pci_host_assign_domain_nr(struct pci_host_bridge *host)
+{
+ host->domain = pci_assign_domain_nr(host->dev.parent);
+}
+
+void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
+{
+ bus->domain_nr = pci_assign_domain_nr(parent);
}
#endif
#endif
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8b3d245..2b1b998 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1327,11 +1327,15 @@ static inline int pci_domain_nr(struct pci_bus *bus)
return bus->domain_nr;
}
void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent);
+void pci_host_assign_domain_nr(struct pci_host_bridge *host);
#else
static inline void pci_bus_assign_domain_nr(struct pci_bus *bus,
struct device *parent)
{
}
+static inline void pci_host_assign_domain_nr(struct pci_host_bridge *host)
+{
+}
#endif
/* some architectures require additional setup to direct VGA traffic */
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 08/29] PCI: Separate pci_host_bridge creation out of pci_create_root_bus()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (6 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 09/29] PCI: Introduce pci_host_bridge_list to manage host bridges Yijing Wang
` (20 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
This patch separate pci_host_bridge creation out
of pci_create_root_bus(), and try to make a generic
pci_host_bridge, then we could place generic PCI
infos like domain number in it. Also Ripping out
pci_host_bridge creation from pci_create_root_bus()
make code more better readability. Further more,
we could use the generic pci_host_bridge to hold
host bridge specific operations like
pcibios_root_bridge_prepare(). The changes are
transparent to platform host bridge drivers.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/host-bridge.c | 55 ++++++++++++++++++++++
drivers/pci/pci.h | 3 +
drivers/pci/probe.c | 114 ++++++++++++++++++++-------------------------
include/linux/pci.h | 1 +
4 files changed, 109 insertions(+), 64 deletions(-)
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index 39b2dbe..3bd45e7 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -8,6 +8,61 @@
#include "pci.h"
+static void pci_release_host_bridge_dev(struct device *dev)
+{
+ struct pci_host_bridge *bridge = to_pci_host_bridge(dev);
+
+ if (bridge->release_fn)
+ bridge->release_fn(bridge);
+
+ pci_free_resource_list(&bridge->windows);
+ kfree(bridge);
+}
+
+struct pci_host_bridge *pci_create_host_bridge(
+ struct device *parent, u32 db, struct list_head *resources)
+{
+ int error;
+ int bus = PCI_BUSNUM(db);
+ int domain = PCI_DOMAIN(db);
+ struct pci_host_bridge *host;
+ struct resource_entry *window, *n;
+
+ host = kzalloc(sizeof(*host), GFP_KERNEL);
+ if (!host)
+ return NULL;
+
+ host->busnum = bus;
+ host->domain = domain;
+ /* If support CONFIG_PCI_DOMAINS_GENERIC, use
+ * pci_host_assign_domain_nr() to assign domain
+ * number instead PCI_DOMAIN(db).
+ */
+ pci_host_assign_domain_nr(host);
+
+ host->dev.parent = parent;
+ INIT_LIST_HEAD(&host->windows);
+ host->dev.release = pci_release_host_bridge_dev;
+ dev_set_name(&host->dev, "pci%04x:%02x", host->domain,
+ host->busnum);
+
+ error = device_register(&host->dev);
+ if (error) {
+ put_device(&host->dev);
+ return NULL;
+ }
+
+ resource_list_for_each_entry_safe(window, n, resources)
+ list_move_tail(&window->node, &host->windows);
+
+ return host;
+}
+
+void pci_free_host_bridge(struct pci_host_bridge *host)
+{
+ device_unregister(&host->dev);
+}
+
static struct pci_bus *find_pci_root_bus(struct pci_bus *bus)
{
while (bus->parent)
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 4091f82..8dcd3bd 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -321,4 +321,7 @@ static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
}
#endif
+struct pci_host_bridge *pci_create_host_bridge(
+ struct device *parent, u32 dombus, struct list_head *resources);
+void pci_free_host_bridge(struct pci_host_bridge *host);
#endif /* DRIVERS_PCI_H */
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index e426354..751fec3 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -502,31 +502,6 @@ static struct pci_bus *pci_alloc_bus(struct pci_bus *parent)
return b;
}
-static void pci_release_host_bridge_dev(struct device *dev)
-{
- struct pci_host_bridge *bridge = to_pci_host_bridge(dev);
-
- if (bridge->release_fn)
- bridge->release_fn(bridge);
-
- pci_free_resource_list(&bridge->windows);
-
- kfree(bridge);
-}
-
-static struct pci_host_bridge *pci_alloc_host_bridge(struct pci_bus *b)
-{
- struct pci_host_bridge *bridge;
-
- bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
- if (!bridge)
- return NULL;
-
- INIT_LIST_HEAD(&bridge->windows);
- bridge->bus = b;
- return bridge;
-}
-
static const unsigned char pcix_bus_speed[] = {
PCI_SPEED_UNKNOWN, /* 0 */
PCI_SPEED_66MHz_PCIX, /* 1 */
@@ -1889,54 +1864,41 @@ void __weak pcibios_remove_bus(struct pci_bus *bus)
{
}
-struct pci_bus *pci_create_root_bus(struct device *parent, u32 db,
- struct pci_ops *ops, void *sysdata, struct list_head *resources)
+static struct pci_bus *__pci_create_root_bus(
+ struct pci_host_bridge *bridge, struct pci_ops *ops,
+ void *sysdata)
{
int error;
- struct pci_host_bridge *bridge;
struct pci_bus *b, *b2;
- struct resource_entry *window, *n;
+ struct resource_entry *window;
+ struct device *parent;
struct resource *res;
resource_size_t offset;
char bus_addr[64];
char *fmt;
- u8 bus = PCI_BUSNUM(db);
+ parent = bridge->dev.parent;
b = pci_alloc_bus(NULL);
if (!b)
return NULL;
b->sysdata = sysdata;
b->ops = ops;
- b->number = b->busn_res.start = bus;
+ b->number = b->busn_res.start = bridge->busnum;
pci_bus_assign_domain_nr(b, parent);
- b2 = pci_find_bus(pci_domain_nr(b), bus);
+ b2 = pci_find_bus(pci_domain_nr(b), b->number);
if (b2) {
/* If we already got to this bus through a different bridge, ignore it */
dev_dbg(&b2->dev, "bus already known\n");
goto err_out;
}
- bridge = pci_alloc_host_bridge(b);
- if (!bridge)
- goto err_out;
-
- bridge->domain = PCI_DOMAIN(db);
- bridge->dev.parent = parent;
- bridge->dev.release = pci_release_host_bridge_dev;
- dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus);
+ bridge->bus = b;
+ b->bridge = get_device(&bridge->dev);
error = pcibios_root_bridge_prepare(bridge);
- if (error) {
- kfree(bridge);
+ if (error)
goto err_out;
- }
- error = device_register(&bridge->dev);
- if (error) {
- put_device(&bridge->dev);
- goto err_out;
- }
- b->bridge = get_device(&bridge->dev);
device_enable_async_suspend(b->bridge);
pci_set_bus_of_node(b);
@@ -1945,10 +1907,11 @@ struct pci_bus *pci_create_root_bus(struct device *parent, u32 db,
b->dev.class = &pcibus_class;
b->dev.parent = b->bridge;
- dev_set_name(&b->dev, "%04x:%02x", pci_domain_nr(b), bus);
+ dev_set_name(&b->dev, "%04x:%02x", bridge->domain,
+ b->number);
error = device_register(&b->dev);
if (error)
- goto class_dev_reg_err;
+ goto err_out;
pcibios_add_bus(b);
@@ -1961,12 +1924,11 @@ struct pci_bus *pci_create_root_bus(struct device *parent, u32 db,
printk(KERN_INFO "PCI host bridge to bus %s\n", dev_name(&b->dev));
/* Add initial resources to the bus */
- resource_list_for_each_entry_safe(window, n, resources) {
- list_move_tail(&window->node, &bridge->windows);
+ resource_list_for_each_entry(window, &bridge->windows) {
res = window->res;
offset = window->offset;
if (res->flags & IORESOURCE_BUS)
- pci_bus_insert_busn_res(b, bus, res->end);
+ pci_bus_insert_busn_res(b, b->number, res->end);
else
pci_bus_add_resource(b, res, 0);
if (offset) {
@@ -1988,14 +1950,23 @@ struct pci_bus *pci_create_root_bus(struct device *parent, u32 db,
return b;
-class_dev_reg_err:
- put_device(&bridge->dev);
- device_unregister(&bridge->dev);
err_out:
kfree(b);
return NULL;
}
+struct pci_bus *pci_create_root_bus(struct device *parent, u32 db,
+ struct pci_ops *ops, void *sysdata, struct list_head *resources)
+{
+ struct pci_host_bridge *host;
+
+ host = pci_create_host_bridge(parent, db, resources);
+ if (!host)
+ return NULL;
+
+ return __pci_create_root_bus(host, ops, sysdata);
+}
+
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max)
{
struct resource *res = &b->busn_res;
@@ -2059,29 +2030,32 @@ void pci_bus_release_busn_res(struct pci_bus *b)
res, ret ? "can not be" : "is");
}
-struct pci_bus *pci_scan_root_bus(struct device *parent, u32 db,
- struct pci_ops *ops, void *sysdata, struct list_head *resources)
+static struct pci_bus *__pci_scan_root_bus(
+ struct pci_host_bridge *host, struct pci_ops *ops,
+ void *sysdata)
{
struct resource_entry *window;
bool found = false;
struct pci_bus *b;
int max;
- resource_list_for_each_entry(window, resources)
+ resource_list_for_each_entry(window, &host->windows)
if (window->res->flags & IORESOURCE_BUS) {
found = true;
break;
}
- b = pci_create_root_bus(parent, db, ops, sysdata, resources);
- if (!b)
+ b = __pci_create_root_bus(host, ops, sysdata);
+ if (!b) {
+ pci_free_host_bridge(host);
return NULL;
+ }
if (!found) {
dev_info(&b->dev,
"No busn resource found for root bus, will use [bus %02x-ff]\n",
- PCI_BUSNUM(db));
- pci_bus_insert_busn_res(b, PCI_BUSNUM(db), 255);
+ host->busnum);
+ pci_bus_insert_busn_res(b, b->number, 255);
}
max = pci_scan_child_bus(b);
@@ -2091,6 +2065,18 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, u32 db,
return b;
}
+
+struct pci_bus *pci_scan_root_bus(struct device *parent, u32 db,
+ struct pci_ops *ops, void *sysdata, struct list_head *resources)
+{
+ struct pci_host_bridge *host;
+
+ host = pci_create_host_bridge(parent, db, resources);
+ if (!host)
+ return NULL;
+
+ return __pci_scan_root_bus(host, ops, sysdata);
+}
EXPORT_SYMBOL(pci_scan_root_bus);
struct pci_bus *pci_scan_bus(u32 db, struct pci_ops *ops,
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 2b1b998..463eaa3 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -402,6 +402,7 @@ static inline int pci_channel_offline(struct pci_dev *pdev)
struct pci_host_bridge {
u16 domain;
+ u16 busnum;
struct device dev;
struct pci_bus *bus; /* root bus */
struct list_head windows; /* resource_entry */
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 09/29] PCI: Introduce pci_host_bridge_list to manage host bridges
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (7 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 10/29] PCI: Save sysdata in pci_host_bridge drvdata Yijing Wang
` (19 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Introduce pci_host_bridge_list to manage pci host
bridges in system, so we could detect whether
the host in domain:bus is alreay registered.
Then we could remove bus alreay exist test in
__pci_create_root_bus().
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/host-bridge.c | 24 +++++++++++++++++++++++-
drivers/pci/probe.c | 8 +-------
include/linux/pci.h | 1 +
3 files changed, 25 insertions(+), 8 deletions(-)
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index 3bd45e7..0bb08ef 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -8,6 +8,9 @@
#include "pci.h"
+static LIST_HEAD(pci_host_bridge_list);
+static DEFINE_MUTEX(phb_mutex);
+
static void pci_release_host_bridge_dev(struct device *dev)
{
struct pci_host_bridge *bridge = to_pci_host_bridge(dev);
@@ -25,7 +28,7 @@ struct pci_host_bridge *pci_create_host_bridge(
int error;
int bus = PCI_BUSNUM(db);
int domain = PCI_DOMAIN(db);
- struct pci_host_bridge *host;
+ struct pci_host_bridge *host, *temp;
struct resource_entry *window, *n;
host = kzalloc(sizeof(*host), GFP_KERNEL);
@@ -40,6 +43,18 @@ struct pci_host_bridge *pci_create_host_bridge(
*/
pci_host_assign_domain_nr(host);
+ mutex_lock(&phb_mutex);
+ list_for_each_entry(temp, &pci_host_bridge_list, list)
+ if (temp->domain == host->domain
+ && temp->busnum == host->busnum) {
+ dev_dbg(&host->dev, "pci host bridge pci%04x:%02x exist\n",
+ host->domain, host->busnum);
+ mutex_unlock(&phb_mutex);
+ kfree(host);
+ return NULL;
+ }
+ mutex_unlock(&phb_mutex);
+
host->dev.parent = parent;
INIT_LIST_HEAD(&host->windows);
host->dev.release = pci_release_host_bridge_dev;
@@ -55,11 +70,18 @@ struct pci_host_bridge *pci_create_host_bridge(
resource_list_for_each_entry_safe(window, n, resources)
list_move_tail(&window->node, &host->windows);
+ mutex_lock(&phb_mutex);
+ list_add_tail(&host->list, &pci_host_bridge_list);
+ mutex_unlock(&phb_mutex);
return host;
}
void pci_free_host_bridge(struct pci_host_bridge *host)
{
+ mutex_lock(&phb_mutex);
+ list_del(&host->list);
+ mutex_unlock(&phb_mutex);
+
device_unregister(&host->dev);
}
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 751fec3..fdb808c 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1869,7 +1869,7 @@ static struct pci_bus *__pci_create_root_bus(
void *sysdata)
{
int error;
- struct pci_bus *b, *b2;
+ struct pci_bus *b;
struct resource_entry *window;
struct device *parent;
struct resource *res;
@@ -1886,12 +1886,6 @@ static struct pci_bus *__pci_create_root_bus(
b->ops = ops;
b->number = b->busn_res.start = bridge->busnum;
pci_bus_assign_domain_nr(b, parent);
- b2 = pci_find_bus(pci_domain_nr(b), b->number);
- if (b2) {
- /* If we already got to this bus through a different bridge, ignore it */
- dev_dbg(&b2->dev, "bus already known\n");
- goto err_out;
- }
bridge->bus = b;
b->bridge = get_device(&bridge->dev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 463eaa3..b621f5b 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -406,6 +406,7 @@ struct pci_host_bridge {
struct device dev;
struct pci_bus *bus; /* root bus */
struct list_head windows; /* resource_entry */
+ struct list_head list;
void (*release_fn)(struct pci_host_bridge *);
void *release_data;
};
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 10/29] PCI: Save sysdata in pci_host_bridge drvdata
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (8 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 11/29] PCI: Introduce pci_host_bridge_ops to support host specific operations Yijing Wang
` (18 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Save platform specific sysdata in pci_host_bridge
drvdata, host bridge specific operation need to
access it before the pci bus creation.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/host-bridge.c | 4 +++-
drivers/pci/pci.h | 4 +++-
drivers/pci/probe.c | 18 ++++++++----------
3 files changed, 14 insertions(+), 12 deletions(-)
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index 0bb08ef..3c34c49 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -23,7 +23,8 @@ static void pci_release_host_bridge_dev(struct device *dev)
}
struct pci_host_bridge *pci_create_host_bridge(
- struct device *parent, u32 db, struct list_head *resources)
+ struct device *parent, u32 db,
+ struct list_head *resources, void *sysdata)
{
int error;
int bus = PCI_BUSNUM(db);
@@ -58,6 +59,7 @@ struct pci_host_bridge *pci_create_host_bridge(
host->dev.parent = parent;
INIT_LIST_HEAD(&host->windows);
host->dev.release = pci_release_host_bridge_dev;
+ dev_set_drvdata(&host->dev, sysdata);
dev_set_name(&host->dev, "pci%04x:%02x", host->domain,
host->busnum);
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 8dcd3bd..8783a1d 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -322,6 +322,8 @@ static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
#endif
struct pci_host_bridge *pci_create_host_bridge(
- struct device *parent, u32 dombus, struct list_head *resources);
+ struct device *parent, u32 dombus,
+ struct list_head *resources, void *sysdata);
+
void pci_free_host_bridge(struct pci_host_bridge *host);
#endif /* DRIVERS_PCI_H */
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index fdb808c..2985281 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1865,8 +1865,7 @@ void __weak pcibios_remove_bus(struct pci_bus *bus)
}
static struct pci_bus *__pci_create_root_bus(
- struct pci_host_bridge *bridge, struct pci_ops *ops,
- void *sysdata)
+ struct pci_host_bridge *bridge, struct pci_ops *ops)
{
int error;
struct pci_bus *b;
@@ -1882,7 +1881,7 @@ static struct pci_bus *__pci_create_root_bus(
if (!b)
return NULL;
- b->sysdata = sysdata;
+ b->sysdata = dev_get_drvdata(&bridge->dev);
b->ops = ops;
b->number = b->busn_res.start = bridge->busnum;
pci_bus_assign_domain_nr(b, parent);
@@ -1954,11 +1953,11 @@ struct pci_bus *pci_create_root_bus(struct device *parent, u32 db,
{
struct pci_host_bridge *host;
- host = pci_create_host_bridge(parent, db, resources);
+ host = pci_create_host_bridge(parent, db, resources, sysdata);
if (!host)
return NULL;
- return __pci_create_root_bus(host, ops, sysdata);
+ return __pci_create_root_bus(host, ops);
}
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max)
@@ -2025,8 +2024,7 @@ void pci_bus_release_busn_res(struct pci_bus *b)
}
static struct pci_bus *__pci_scan_root_bus(
- struct pci_host_bridge *host, struct pci_ops *ops,
- void *sysdata)
+ struct pci_host_bridge *host, struct pci_ops *ops)
{
struct resource_entry *window;
bool found = false;
@@ -2039,7 +2037,7 @@ static struct pci_bus *__pci_scan_root_bus(
break;
}
- b = __pci_create_root_bus(host, ops, sysdata);
+ b = __pci_create_root_bus(host, ops);
if (!b) {
pci_free_host_bridge(host);
return NULL;
@@ -2065,11 +2063,11 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, u32 db,
{
struct pci_host_bridge *host;
- host = pci_create_host_bridge(parent, db, resources);
+ host = pci_create_host_bridge(parent, db, resources, sysdata);
if (!host)
return NULL;
- return __pci_scan_root_bus(host, ops, sysdata);
+ return __pci_scan_root_bus(host, ops);
}
EXPORT_SYMBOL(pci_scan_root_bus);
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 11/29] PCI: Introduce pci_host_bridge_ops to support host specific operations
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (9 preceding siblings ...)
2015-03-06 9:33 ` [PATCH v5 10/29] PCI: Save sysdata in pci_host_bridge drvdata Yijing Wang
@ 2015-03-06 9:33 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 12/29] PCI: Introduce new scan function pci_scan_host_bridge() Yijing Wang
` (17 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Now we have weak functions like pcibios_root_bridge_prepare()
to setup pci host bridge, We could introduce pci_host_bridge_ops
which contain host bridge specific ops to setup pci_host_bridge.
Then host bridge driver could add pci_host_bridge_ops hooks
intead of weak function to setup pci_host_bridge.
This patch add following pci_host_bridge_ops hooks:
pci_host_bridge_ops {
/* set root bus speed, some platform need this like powerpc */
void (*set_root_bus_speed)(struct pci_host_bridge *host);
/* setup pci_host_bridge before pci_host_bridge be added to driver core */
int (*prepare)(struct pci_host_bridge *host);
/* platform specific of scan hook to scan pci device */
void (*scan_bus)(struct pci_host_bridge *);
}
We could easily extend it to support different host bridge
specific operations.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/host-bridge.c | 12 ++++++++++--
drivers/pci/pci.h | 4 ++--
drivers/pci/probe.c | 17 +++++++++++------
include/linux/pci.h | 8 ++++++++
4 files changed, 31 insertions(+), 10 deletions(-)
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index 3c34c49..bc1de59 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -23,8 +23,8 @@ static void pci_release_host_bridge_dev(struct device *dev)
}
struct pci_host_bridge *pci_create_host_bridge(
- struct device *parent, u32 db,
- struct list_head *resources, void *sysdata)
+ struct device *parent, u32 db, struct list_head *resources,
+ void *sysdata, struct pci_host_bridge_ops *ops)
{
int error;
int bus = PCI_BUSNUM(db);
@@ -56,6 +56,7 @@ struct pci_host_bridge *pci_create_host_bridge(
}
mutex_unlock(&phb_mutex);
+ host->ops = ops;
host->dev.parent = parent;
INIT_LIST_HEAD(&host->windows);
host->dev.release = pci_release_host_bridge_dev;
@@ -63,6 +64,13 @@ struct pci_host_bridge *pci_create_host_bridge(
dev_set_name(&host->dev, "pci%04x:%02x", host->domain,
host->busnum);
+ if (host->ops && host->ops->prepare) {
+ error = host->ops->prepare(host);
+ if (error) {
+ kfree(host);
+ return NULL;
+ }
+ }
error = device_register(&host->dev);
if (error) {
put_device(&host->dev);
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 8783a1d..8bf5be7 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -322,8 +322,8 @@ static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
#endif
struct pci_host_bridge *pci_create_host_bridge(
- struct device *parent, u32 dombus,
- struct list_head *resources, void *sysdata);
+ struct device *parent, u32 dombus, struct list_head *resources,
+ void *sysdata, struct pci_host_bridge_ops *ops);
void pci_free_host_bridge(struct pci_host_bridge *host);
#endif /* DRIVERS_PCI_H */
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 2985281..b76fca6 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1888,6 +1888,8 @@ static struct pci_bus *__pci_create_root_bus(
bridge->bus = b;
b->bridge = get_device(&bridge->dev);
+ if (bridge->ops && bridge->ops->set_root_bus_speed)
+ bridge->ops->set_root_bus_speed(bridge);
error = pcibios_root_bridge_prepare(bridge);
if (error)
goto err_out;
@@ -1953,7 +1955,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, u32 db,
{
struct pci_host_bridge *host;
- host = pci_create_host_bridge(parent, db, resources, sysdata);
+ host = pci_create_host_bridge(parent, db, resources, sysdata, NULL);
if (!host)
return NULL;
@@ -2050,10 +2052,13 @@ static struct pci_bus *__pci_scan_root_bus(
pci_bus_insert_busn_res(b, b->number, 255);
}
- max = pci_scan_child_bus(b);
-
- if (!found)
- pci_bus_update_busn_res_end(b, max);
+ if (host->ops && host->ops->scan_bus) {
+ host->ops->scan_bus(host);
+ } else {
+ max = pci_scan_child_bus(b);
+ if (!found)
+ pci_bus_update_busn_res_end(b, max);
+ }
return b;
}
@@ -2063,7 +2068,7 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, u32 db,
{
struct pci_host_bridge *host;
- host = pci_create_host_bridge(parent, db, resources, sysdata);
+ host = pci_create_host_bridge(parent, db, resources, sysdata, NULL);
if (!host)
return NULL;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b621f5b..e9922b1 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -400,6 +400,13 @@ static inline int pci_channel_offline(struct pci_dev *pdev)
return (pdev->error_state != pci_channel_io_normal);
}
+struct pci_host_bridge;
+struct pci_host_bridge_ops {
+ void (*set_root_bus_speed)(struct pci_host_bridge *host);
+ int (*prepare)(struct pci_host_bridge *host);
+ void (*scan_bus)(struct pci_host_bridge *);
+};
+
struct pci_host_bridge {
u16 domain;
u16 busnum;
@@ -407,6 +414,7 @@ struct pci_host_bridge {
struct pci_bus *bus; /* root bus */
struct list_head windows; /* resource_entry */
struct list_head list;
+ struct pci_host_bridge_ops *ops;
void (*release_fn)(struct pci_host_bridge *);
void *release_data;
};
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 12/29] PCI: Introduce new scan function pci_scan_host_bridge()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (10 preceding siblings ...)
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 ` 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
` (16 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Introduce new scan function pci_scan_host_bridge() to
support host bridge drivers that need to provide platform
own pci_host_bridge_ops.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/probe.c | 22 ++++++++++++++++++++++
include/linux/pci.h | 4 ++++
2 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index b76fca6..54557a1 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2063,6 +2063,28 @@ static struct pci_bus *__pci_scan_root_bus(
return b;
}
+struct pci_host_bridge *pci_scan_host_bridge(struct device *parent,
+ u32 db, struct pci_ops *ops, void *sysdata,
+ struct list_head *resources,
+ struct pci_host_bridge_ops *phb_ops)
+{
+ struct pci_host_bridge *host;
+ struct pci_bus *bus;
+
+ host = pci_create_host_bridge(parent, db, resources,
+ sysdata, phb_ops);
+ if (!host)
+ return NULL;
+
+ bus = __pci_scan_root_bus(host, ops);
+ if (!bus)
+ pci_free_host_bridge(host);
+
+ return host;
+}
+EXPORT_SYMBOL(pci_scan_host_bridge);
+
+
struct pci_bus *pci_scan_root_bus(struct device *parent, u32 db,
struct pci_ops *ops, void *sysdata, struct list_head *resources)
{
diff --git a/include/linux/pci.h b/include/linux/pci.h
index e9922b1..28eafb5 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -790,6 +790,10 @@ void pci_bus_release_busn_res(struct pci_bus *b);
struct pci_bus *pci_scan_root_bus(struct device *parent, u32 dombus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
+struct pci_host_bridge *pci_scan_host_bridge(struct device *parent,
+ u32 dombus, struct pci_ops *ops, void *sysdata,
+ struct list_head *resources,
+ struct pci_host_bridge_ops *phb_ops);
struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
int busnr);
void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 13/29] x86/PCI: Refine pci_acpi_scan_root() with generic pci_host_bridge
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (11 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 14/29] ia64/PCI: " Yijing Wang
` (15 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: x86 at kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
arch/x86/pci/acpi.c | 36 ++++++++++++++++++++----------------
1 files changed, 20 insertions(+), 16 deletions(-)
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index ad0e926..e730d31 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -349,6 +349,18 @@ static void probe_pci_root_info(struct pci_root_info *info,
entry->res->name = info->name;
}
+static int pci_host_bridge_prepare(struct pci_host_bridge *bridge)
+{
+ struct pci_sysdata *sd = dev_get_drvdata(&bridge->dev);
+
+ ACPI_COMPANION_SET(&bridge->dev, sd->companion);
+ return 0;
+}
+
+static struct pci_host_bridge_ops phb_ops = {
+ .prepare = pci_host_bridge_prepare,
+};
+
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
struct acpi_device *device = root->device;
@@ -359,6 +371,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
LIST_HEAD(crs_res);
LIST_HEAD(resources);
struct pci_bus *bus;
+ struct pci_host_bridge *host = NULL;
struct pci_sysdata *sd;
int node;
@@ -425,14 +438,13 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
(u8)root->secondary.end, root->mcfg_addr))
- bus = pci_create_root_bus(NULL,
- PCI_DOMBUS(domain, busnum), &pci_root_ops,
- sd, &resources);
-
- if (bus) {
- pci_scan_child_bus(bus);
- pci_set_host_bridge_release(
- to_pci_host_bridge(bus->bridge),
+ host = pci_scan_host_bridge(NULL,
+ PCI_DOMBUS(domain, busnum),
+ &pci_root_ops, sd, &resources, &phb_ops);
+
+ if (host) {
+ bus = host->bus;
+ pci_set_host_bridge_release(host,
release_pci_root_info, info);
} else {
resource_list_free(&resources);
@@ -456,14 +468,6 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
return bus;
}
-int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
-{
- struct pci_sysdata *sd = bridge->bus->sysdata;
-
- ACPI_COMPANION_SET(&bridge->dev, sd->companion);
- return 0;
-}
-
int __init pci_acpi_init(void)
{
struct pci_dev *dev = NULL;
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 14/29] ia64/PCI: Refine pci_acpi_scan_root() with generic pci_host_bridge
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (12 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 15/29] powerpc/pci: Rename pcibios_root_bridge_prepare() Yijing Wang
` (14 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
From: Yijing Wang <wangyijing0307@gmail.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Tony Luck <tony.luck@intel.com>
CC: Fenghua Yu <fenghua.yu@intel.com>
CC: linux-ia64 at vger.kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
arch/ia64/pci/pci.c | 34 ++++++++++++++++++----------------
1 files changed, 18 insertions(+), 16 deletions(-)
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 675749f..0245862 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -420,6 +420,18 @@ probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
return 0;
}
+static int pci_host_bridge_prepare(struct pci_host_bridge *bridge)
+{
+ struct pci_controller *controller = bridge->bus->sysdata;
+
+ ACPI_COMPANION_SET(&bridge->dev, controller->companion);
+ return 0;
+}
+
+static struct pci_host_bridge_ops phb_ops = {
+ .prepare = pci_host_bridge_prepare,
+};
+
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
struct acpi_device *device = root->device;
@@ -428,7 +440,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
struct pci_controller *controller;
struct pci_root_info *info = NULL;
int busnum = root->secondary.start;
- struct pci_bus *pbus;
+ struct pci_host_bridge *host;
int ret;
controller = alloc_pci_controller(domain);
@@ -465,26 +477,16 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
* should handle the case here, but it appears that IA64 hasn't
* such quirk. So we just ignore the case now.
*/
- pbus = pci_create_root_bus(NULL, PCI_DOMBUS(domain, bus),
- &pci_root_ops, controller, &info->resources);
- if (!pbus) {
+ host = pci_scan_host_bridge(NULL, PCI_DOMBUS(domain, bus),
+ &pci_root_ops, controller, &info->resources, &phb_ops);
+ if (!host) {
pci_free_resource_list(&info->resources);
__release_pci_root_info(info);
return NULL;
}
- pci_set_host_bridge_release(to_pci_host_bridge(pbus->bridge),
- release_pci_root_info, info);
- pci_scan_child_bus(pbus);
- return pbus;
-}
-
-int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
-{
- struct pci_controller *controller = bridge->bus->sysdata;
-
- ACPI_COMPANION_SET(&bridge->dev, controller->companion);
- return 0;
+ pci_set_host_bridge_release(host, release_pci_root_info, info);
+ return host->bus;
}
void pcibios_fixup_device_resources(struct pci_dev *dev)
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 15/29] powerpc/pci: Rename pcibios_root_bridge_prepare()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (13 preceding siblings ...)
2015-03-06 9:33 ` [PATCH v5 14/29] ia64/PCI: " Yijing Wang
@ 2015-03-06 9:33 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 16/29] powerpc/pci: Use pci_scan_host_bridge() for simplicity Yijing Wang
` (13 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Pcibios_root_bridge_prepare() in powerpc is used
to set root bus speed. Rename it to
pcibios_set_root_bus_speed() for better readability.
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 | 4 ++--
arch/powerpc/platforms/pseries/pci.c | 2 +-
arch/powerpc/platforms/pseries/pseries.h | 2 +-
arch/powerpc/platforms/pseries/setup.c | 2 +-
5 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index c8175a3..8e7f2a8 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_root_bridge_prepare)(struct pci_host_bridge
+ int (*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 a467aca..0d8b369 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -769,8 +769,8 @@ int pci_proc_domain(struct pci_bus *bus)
int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
{
- if (ppc_md.pcibios_root_bridge_prepare)
- return ppc_md.pcibios_root_bridge_prepare(bridge);
+ if (ppc_md.pcibios_set_root_bus_speed)
+ return ppc_md.pcibios_set_root_bus_speed(bridge);
return 0;
}
diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c
index fe16a50..af685d6 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_root_bridge_prepare(struct pci_host_bridge *bridge)
+int pseries_set_root_bus_speed(struct pci_host_bridge *bridge)
{
struct device_node *dn, *pdn;
struct pci_bus *bus;
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index 1796c54..5d0be3a 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_root_bridge_prepare(struct pci_host_bridge *bridge);
+int pseries_set_root_bus_speed(struct pci_host_bridge *bridge);
unsigned long pseries_memory_block_size(void);
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index e445b67..b196c0d 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -496,7 +496,7 @@ static void __init pSeries_setup_arch(void)
ppc_md.enable_pmcs = power4_enable_pmcs;
}
- ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare;
+ ppc_md.pcibios_set_root_bus_speed = pseries_set_root_bus_speed;
if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
long rc;
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 16/29] powerpc/pci: Use pci_scan_host_bridge() for simplicity
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (14 preceding siblings ...)
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
2015-03-06 14:19 ` Rob Herring
2015-03-06 9:33 ` [PATCH v5 17/29] PCI: Remove weak pcibios_root_bridge_prepare() Yijing Wang
` (12 subsequent siblings)
28 siblings, 1 reply; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
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
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 16/29] powerpc/pci: Use pci_scan_host_bridge() for simplicity
2015-03-06 9:33 ` [PATCH v5 16/29] powerpc/pci: Use pci_scan_host_bridge() for simplicity Yijing Wang
@ 2015-03-06 14:19 ` Rob Herring
2015-03-09 2:47 ` Yijing Wang
0 siblings, 1 reply; 32+ messages in thread
From: Rob Herring @ 2015-03-06 14:19 UTC (permalink / raw)
To: linux-arm-kernel
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 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);
Shouldn't this be part of patch 15?
Rob
^ permalink raw reply [flat|nested] 32+ messages in thread* [PATCH v5 16/29] powerpc/pci: Use pci_scan_host_bridge() for simplicity
2015-03-06 14:19 ` Rob Herring
@ 2015-03-09 2:47 ` Yijing Wang
0 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-09 2:47 UTC (permalink / raw)
To: linux-arm-kernel
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 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);
>
> 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
>
> .
>
--
Thanks!
Yijing
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v5 17/29] PCI: Remove weak pcibios_root_bridge_prepare()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (15 preceding siblings ...)
2015-03-06 9:33 ` [PATCH v5 16/29] powerpc/pci: Use pci_scan_host_bridge() for simplicity Yijing Wang
@ 2015-03-06 9:33 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 18/29] sparc/PCI: Claim bus resources before pci_bus_add_devices() Yijing Wang
` (11 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Now no one use weak pcibios_root_bridge_prepare(),
we could remove it.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/probe.c | 16 +---------------
include/linux/pci.h | 2 --
2 files changed, 1 insertions(+), 17 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 54557a1..63193b7 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1844,18 +1844,6 @@ unsigned int pci_scan_child_bus(struct pci_bus *bus)
}
EXPORT_SYMBOL_GPL(pci_scan_child_bus);
-/**
- * pcibios_root_bridge_prepare - Platform-specific host bridge setup.
- * @bridge: Host bridge to set up.
- *
- * Default empty implementation. Replace with an architecture-specific setup
- * routine, if necessary.
- */
-int __weak pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
-{
- return 0;
-}
-
void __weak pcibios_add_bus(struct pci_bus *bus)
{
}
@@ -1888,11 +1876,9 @@ static struct pci_bus *__pci_create_root_bus(
bridge->bus = b;
b->bridge = get_device(&bridge->dev);
+
if (bridge->ops && bridge->ops->set_root_bus_speed)
bridge->ops->set_root_bus_speed(bridge);
- error = pcibios_root_bridge_prepare(bridge);
- if (error)
- goto err_out;
device_enable_async_suspend(b->bridge);
pci_set_bus_of_node(b);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 28eafb5..cfaf217 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -424,8 +424,6 @@ void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
void (*release_fn)(struct pci_host_bridge *),
void *release_data);
-int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
-
/*
* The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
* to P2P or CardBus bridge windows) go in a table. Additional ones (for
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 18/29] sparc/PCI: Claim bus resources before pci_bus_add_devices()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (16 preceding siblings ...)
2015-03-06 9:33 ` [PATCH v5 17/29] PCI: Remove weak pcibios_root_bridge_prepare() Yijing Wang
@ 2015-03-06 9:33 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 19/29] sparc/PCI: Use pci_scan_host_bridge() for simplicity Yijing Wang
` (10 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Pci_claim_bus_resources() should be called before
pci_bus_add_devices(), or driver may failed to
load, because the resources had not claimed.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
---
arch/sparc/kernel/pci.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 838fe1e..21f804a 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -678,11 +678,10 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
}
pci_of_scan_bus(pbm, node, bus);
- pci_bus_add_devices(bus);
pci_bus_register_of_sysfs(bus);
pci_claim_bus_resources(bus);
-
+ pci_bus_add_devices(bus);
return bus;
}
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 19/29] sparc/PCI: Use pci_scan_host_bridge() for simplicity
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (17 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 20/29] PCI: Introduce pci_bus_child_max_busnr() Yijing Wang
` (9 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Now we could use pci_scan_host_bridge() to scan
pci buses, provide sparc specific pci_host_bridge_ops.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: sparclinux at vger.kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
arch/sparc/kernel/pci.c | 32 ++++++++++++++++++++++----------
1 files changed, 22 insertions(+), 10 deletions(-)
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 21f804a..7e28f74 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -650,12 +650,25 @@ static void pci_claim_bus_resources(struct pci_bus *bus)
pci_claim_bus_resources(child_bus);
}
+static void pci_host_bridge_of_scan_bus(
+ struct pci_host_bridge *host)
+{
+ struct pci_pbm_info *pbm = dev_get_drvdata(&host->dev);
+ struct device_node *node = pbm->op->dev.of_node;
+
+ pci_of_scan_bus(pbm, node, host->bus);
+}
+
+static struct pci_host_bridge_ops phb_ops = {
+ .scan_bus = pci_host_bridge_of_scan_bus,
+};
+
struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
struct device *parent)
{
LIST_HEAD(resources);
struct device_node *node = pbm->op->dev.of_node;
- struct pci_bus *bus;
+ struct pci_host_bridge *host;
printk("PCI: Scanning PBM %s\n", node->full_name);
@@ -667,22 +680,21 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
pbm->busn.end = pbm->pci_last_busno;
pbm->busn.flags = IORESOURCE_BUS;
pci_add_resource(&resources, &pbm->busn);
- bus = pci_create_root_bus(parent,
+ host = pci_scan_host_bridge(parent,
PCI_DOMBUS(pbm->index, pbm->pci_first_busno),
- pbm->pci_ops, pbm, &resources);
- if (!bus) {
- printk(KERN_ERR "Failed to create bus for %s\n",
+ pbm->pci_ops, pbm, &resources, &phb_ops);
+ if (!host) {
+ printk(KERN_ERR "Failed to create host bridge for %s\n",
node->full_name);
pci_free_resource_list(&resources);
return NULL;
}
- pci_of_scan_bus(pbm, node, bus);
- pci_bus_register_of_sysfs(bus);
+ pci_bus_register_of_sysfs(host->bus);
- pci_claim_bus_resources(bus);
- pci_bus_add_devices(bus);
- return bus;
+ pci_claim_bus_resources(host->bus);
+ pci_bus_add_devices(host->bus);
+ return host->bus;
}
void pcibios_fixup_bus(struct pci_bus *pbus)
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 20/29] PCI: Introduce pci_bus_child_max_busnr()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (18 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 21/29] parisc/PCI: Use pci_scan_root_bus() for simplicity Yijing Wang
` (8 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Sometimes, we need to know the highest reserved
busnr for children bus. Because parent's
bus->busn_res could have padding in it.
This function return the max child busnr as
pci_scan_child_bus().
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---
drivers/pci/hotplug/acpiphp_glue.c | 29 +----------------------------
drivers/pci/pci.c | 27 +++++++++++++++++++++++++--
include/linux/pci.h | 2 +-
3 files changed, 27 insertions(+), 31 deletions(-)
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index bcb90e4..84f2584 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -397,33 +397,6 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
acpi_unlock_hp_context();
}
-/**
- * acpiphp_max_busnr - return the highest reserved bus number under the given bus.
- * @bus: bus to start search with
- */
-static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
-{
- struct pci_bus *tmp;
- unsigned char max, n;
-
- /*
- * pci_bus_max_busnr will return the highest
- * reserved busnr for all these children.
- * that is equivalent to the bus->subordinate
- * value. We don't want to use the parent's
- * bus->subordinate value because it could have
- * padding in it.
- */
- max = bus->busn_res.start;
-
- list_for_each_entry(tmp, &bus->children, node) {
- n = pci_bus_max_busnr(tmp);
- if (n > max)
- max = n;
- }
- return max;
-}
-
static void acpiphp_set_acpi_region(struct acpiphp_slot *slot)
{
struct acpiphp_func *func;
@@ -489,7 +462,7 @@ static void enable_slot(struct acpiphp_slot *slot)
LIST_HEAD(add_list);
acpiphp_rescan_slot(slot);
- max = acpiphp_max_busnr(bus);
+ max = pci_bus_child_max_busnr(bus);
for (pass = 0; pass < 2; pass++) {
list_for_each_entry(dev, &bus->devices, bus_list) {
if (PCI_SLOT(dev->devfn) != slot->device)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index c49eec1..0001896 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -108,7 +108,7 @@ static bool pcie_ari_disabled;
* Given a PCI bus, returns the highest PCI bus number present in the set
* including the given PCI bus and its list of child PCI buses.
*/
-unsigned char pci_bus_max_busnr(struct pci_bus *bus)
+static unsigned char pci_bus_max_busnr(struct pci_bus *bus)
{
struct pci_bus *tmp;
unsigned char max, n;
@@ -121,7 +121,30 @@ unsigned char pci_bus_max_busnr(struct pci_bus *bus)
}
return max;
}
-EXPORT_SYMBOL_GPL(pci_bus_max_busnr);
+
+unsigned char pci_bus_child_max_busnr(struct pci_bus *bus)
+{
+ struct pci_bus *tmp;
+ unsigned char max, n;
+
+ /*
+ * pci_bus_max_busnr will return the highest
+ * reserved busnr for all these children.
+ * that is equivalent to the bus->subordinate
+ * value. We don't want to use the parent's
+ * bus->subordinate value because it could have
+ * padding in it.
+ */
+ max = bus->busn_res.start;
+
+ list_for_each_entry(tmp, &bus->children, node) {
+ n = pci_bus_max_busnr(tmp);
+ if (n > max)
+ max = n;
+ }
+ return max;
+}
+EXPORT_SYMBOL_GPL(pci_bus_child_max_busnr);
#ifdef CONFIG_HAS_IOMEM
void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index cfaf217..261b8de 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1181,7 +1181,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
void *userdata);
int pci_cfg_space_size(struct pci_dev *dev);
-unsigned char pci_bus_max_busnr(struct pci_bus *bus);
+unsigned char pci_bus_child_max_busnr(struct pci_bus *bus);
void pci_setup_bridge(struct pci_bus *bus);
resource_size_t pcibios_window_alignment(struct pci_bus *bus,
unsigned long type);
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 21/29] parisc/PCI: Use pci_scan_root_bus() for simplicity
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (19 preceding siblings ...)
2015-03-06 9:33 ` [PATCH v5 20/29] PCI: Introduce pci_bus_child_max_busnr() Yijing Wang
@ 2015-03-06 9:33 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 22/29] PCI/mvebu: Use pci_common_init_dev() to simplify code Yijing Wang
` (7 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
From: Yijing Wang <wangyijing0307@gmail.com>
Now pci_bus_add_devices() has been ripped out
from pci_scan_root_bus(), we could use pci_scan_root_bus()
instead of pci_create_root_bus() + pci_scan_child_bus()
for simplicity.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: "James E.J. Bottomley" <jejb@parisc-linux.org>
CC: linux-parisc at vger.kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/parisc/dino.c | 8 +++-----
drivers/parisc/lba_pci.c | 7 ++-----
2 files changed, 5 insertions(+), 10 deletions(-)
diff --git a/drivers/parisc/dino.c b/drivers/parisc/dino.c
index a0580af..eb76a9d 100644
--- a/drivers/parisc/dino.c
+++ b/drivers/parisc/dino.c
@@ -981,11 +981,12 @@ static int __init dino_probe(struct parisc_device *dev)
dino_dev->hba.bus_num.end = 255;
dino_dev->hba.bus_num.flags = IORESOURCE_BUS;
pci_add_resource(&resources, &dino_dev->hba.bus_num);
+
/*
** It's not used to avoid chicken/egg problems
** with configuration accessor functions.
*/
- dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev,
+ dino_dev->hba.hba_bus = bus = pci_scan_root_bus(&dev->dev,
dino_current_bus, &dino_cfg_ops, NULL, &resources);
if (!bus) {
printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n",
@@ -996,13 +997,10 @@ static int __init dino_probe(struct parisc_device *dev)
return 0;
}
- max = pci_scan_child_bus(bus);
- pci_bus_update_busn_res_end(bus, max);
-
/* This code *depends* on scanning being single threaded
* if it isn't, this global bus number count will fail
*/
- dino_current_bus = max + 1;
+ dino_current_bus = bus->busn_res.end + 1;
pci_bus_assign_resources(bus);
pci_bus_add_devices(bus);
return 0;
diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c
index dceb9dd..ba6daec 100644
--- a/drivers/parisc/lba_pci.c
+++ b/drivers/parisc/lba_pci.c
@@ -1422,7 +1422,6 @@ lba_driver_probe(struct parisc_device *dev)
void *tmp_obj;
char *version;
void __iomem *addr = ioremap_nocache(dev->hpa.start, 4096);
- int max;
/* Read HW Rev First */
func_class = READ_REG32(addr + LBA_FCLASS);
@@ -1563,15 +1562,13 @@ lba_driver_probe(struct parisc_device *dev)
dev->dev.platform_data = lba_dev;
lba_bus = lba_dev->hba.hba_bus =
- pci_create_root_bus(&dev->dev, lba_dev->hba.bus_num.start,
+ pci_scan_root_bus(&dev->dev, lba_dev->hba.bus_num.start,
cfg_ops, NULL, &resources);
if (!lba_bus) {
pci_free_resource_list(&resources);
return 0;
}
- max = pci_scan_child_bus(lba_bus);
-
/* This is in lieu of calling pci_assign_unassigned_resources() */
if (is_pdc_pat()) {
/* assign resources to un-initialized devices */
@@ -1599,7 +1596,7 @@ lba_driver_probe(struct parisc_device *dev)
lba_dev->flags |= LBA_FLAG_SKIP_PROBE;
}
- lba_next_bus = max + 1;
+ lba_next_bus = pci_bus_child_max_busnr(lba_bus) + 1;
pci_bus_add_devices(lba_bus);
/* Whew! Finally done! Tell services we got this one covered. */
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 22/29] PCI/mvebu: Use pci_common_init_dev() to simplify code
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (20 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 23/29] PCI/tegra: Remove redundant tegra_pcie_scan_bus() Yijing Wang
` (6 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Mvebu_pcie_scan_bus() is not necessary, we could use
pci_common_init_dev() instead of pci_common_init(),
and pass the device pointer as the parent. Then
pci_scan_root_bus() will be called to scan the pci busses.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
CC: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/host/pci-mvebu.c | 18 +-----------------
1 files changed, 1 insertions(+), 17 deletions(-)
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index 1309cfb..d5a2b70 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -750,21 +750,6 @@ static int mvebu_pcie_setup(int nr, struct pci_sys_data *sys)
return 1;
}
-static struct pci_bus *mvebu_pcie_scan_bus(int nr, struct pci_sys_data *sys)
-{
- struct mvebu_pcie *pcie = sys_to_pcie(sys);
- struct pci_bus *bus;
-
- bus = pci_create_root_bus(&pcie->pdev->dev, sys->busnr,
- &mvebu_pcie_ops, sys, &sys->resources);
- if (!bus)
- return NULL;
-
- pci_scan_child_bus(bus);
-
- return bus;
-}
-
static resource_size_t mvebu_pcie_align_resource(struct pci_dev *dev,
const struct resource *res,
resource_size_t start,
@@ -808,12 +793,11 @@ static void mvebu_pcie_enable(struct mvebu_pcie *pcie)
hw.nr_controllers = 1;
hw.private_data = (void **)&pcie;
hw.setup = mvebu_pcie_setup;
- hw.scan = mvebu_pcie_scan_bus;
hw.map_irq = of_irq_parse_and_map_pci;
hw.ops = &mvebu_pcie_ops;
hw.align_resource = mvebu_pcie_align_resource;
- pci_common_init(&hw);
+ pci_common_init_dev(&pcie->pdev->dev, &hw);
}
/*
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 23/29] PCI/tegra: Remove redundant tegra_pcie_scan_bus()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (21 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 24/29] PCI/designware: Use pci_scan_root_bus() for simplicity Yijing Wang
` (5 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Now pci_scan_root_bus() is almost similar to
pci_create_root_bus() + pci_scan_child_bus().
So we could use common pci_scan_root_bus() in
pci_common_init_dev() to scan pci busses.
tegra_pcie_scan_bus() is redundant, remove it.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: linux-tegra at vger.kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/host/pci-tegra.c | 16 ----------------
1 files changed, 0 insertions(+), 16 deletions(-)
diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 00e9272..10c0571 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -630,21 +630,6 @@ static int tegra_pcie_map_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
return irq;
}
-static struct pci_bus *tegra_pcie_scan_bus(int nr, struct pci_sys_data *sys)
-{
- struct tegra_pcie *pcie = sys_to_pcie(sys);
- struct pci_bus *bus;
-
- bus = pci_create_root_bus(pcie->dev, sys->busnr, &tegra_pcie_ops, sys,
- &sys->resources);
- if (!bus)
- return NULL;
-
- pci_scan_child_bus(bus);
-
- return bus;
-}
-
static irqreturn_t tegra_pcie_isr(int irq, void *arg)
{
const char *err_msg[] = {
@@ -1831,7 +1816,6 @@ static int tegra_pcie_enable(struct tegra_pcie *pcie)
hw.private_data = (void **)&pcie;
hw.setup = tegra_pcie_setup;
hw.map_irq = tegra_pcie_map_irq;
- hw.scan = tegra_pcie_scan_bus;
hw.ops = &tegra_pcie_ops;
pci_common_init_dev(pcie->dev, &hw);
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 24/29] PCI/designware: Use pci_scan_root_bus() for simplicity
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (22 preceding siblings ...)
2015-03-06 9:33 ` [PATCH v5 23/29] PCI/tegra: Remove redundant tegra_pcie_scan_bus() Yijing Wang
@ 2015-03-06 9:33 ` 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
` (4 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Use pci_scan_root_bus() instead of pci_create_root_bus() +
pci_scan_child_bus() for simplicity.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Mohit Kumar <mohit.kumar@st.com>
CC: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/host/pcie-designware.c | 4 +---
1 files changed, 1 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 1f4ea6f..658b46b 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -728,13 +728,11 @@ static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
struct pcie_port *pp = sys_to_pcie(sys);
pp->root_bus_nr = sys->busnr;
- bus = pci_create_root_bus(pp->dev, sys->busnr,
+ bus = pci_scan_root_bus(pp->dev, sys->busnr,
&dw_pcie_ops, sys, &sys->resources);
if (!bus)
return NULL;
- pci_scan_child_bus(bus);
-
if (bus && pp->ops->scan_bus)
pp->ops->scan_bus(pp);
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 25/29] PCI/xgene: Use pci_scan_root_bus() instead of pci_create_root_bus()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (23 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 26/29] PCI: Rename __pci_create_root_bus() to pci_create_root_bus() Yijing Wang
` (3 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Use pci_scan_root_bus() instead of pci_create_root_bus() +
pci_scan_child_bus() for simplicity.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Tanmay Inamdar <tinamdar@apm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/host/pci-xgene.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
index aab5547..0c0e632 100644
--- a/drivers/pci/host/pci-xgene.c
+++ b/drivers/pci/host/pci-xgene.c
@@ -499,12 +499,11 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
if (ret)
return ret;
- bus = pci_create_root_bus(&pdev->dev, 0,
+ bus = pci_scan_root_bus(&pdev->dev, 0,
&xgene_pcie_ops, port, &res);
if (!bus)
return -ENOMEM;
- pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);
pci_bus_add_devices(bus);
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 26/29] PCI: Rename __pci_create_root_bus() to pci_create_root_bus()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (24 preceding siblings ...)
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 ` 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
` (2 subsequent siblings)
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Now no one use pci_create_root_bus(), we could remove it
and rename __pci_create_root_bus() to pci_create_root_bus().
Signed-off-by: wangyijing at huawei.com
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/probe.c | 27 ++++++++-------------------
include/linux/pci.h | 3 ---
2 files changed, 8 insertions(+), 22 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 63193b7..aae911a 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1852,7 +1852,7 @@ void __weak pcibios_remove_bus(struct pci_bus *bus)
{
}
-static struct pci_bus *__pci_create_root_bus(
+static struct pci_bus *pci_create_root_bus(
struct pci_host_bridge *bridge, struct pci_ops *ops)
{
int error;
@@ -1936,18 +1936,6 @@ err_out:
return NULL;
}
-struct pci_bus *pci_create_root_bus(struct device *parent, u32 db,
- struct pci_ops *ops, void *sysdata, struct list_head *resources)
-{
- struct pci_host_bridge *host;
-
- host = pci_create_host_bridge(parent, db, resources, sysdata, NULL);
- if (!host)
- return NULL;
-
- return __pci_create_root_bus(host, ops);
-}
-
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max)
{
struct resource *res = &b->busn_res;
@@ -2025,7 +2013,7 @@ static struct pci_bus *__pci_scan_root_bus(
break;
}
- b = __pci_create_root_bus(host, ops);
+ b = pci_create_root_bus(host, ops);
if (!b) {
pci_free_host_bridge(host);
return NULL;
@@ -2088,18 +2076,19 @@ struct pci_bus *pci_scan_bus(u32 db, struct pci_ops *ops,
void *sysdata)
{
LIST_HEAD(resources);
- struct pci_bus *b;
+ struct pci_host_bridge *host;
pci_add_resource(&resources, &ioport_resource);
pci_add_resource(&resources, &iomem_resource);
pci_add_resource(&resources, &busn_resource);
- b = pci_create_root_bus(NULL, db, ops, sysdata, &resources);
- if (b) {
- pci_scan_child_bus(b);
+ host = pci_create_host_bridge(NULL, db, sysdata, &resources, NULL);
+ if (host) {
+ __pci_scan_root_bus(host, ops);
+ return host->bus;
} else {
pci_free_resource_list(&resources);
}
- return b;
+ return NULL;
}
EXPORT_SYMBOL(pci_scan_bus);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 261b8de..5717b14 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -779,9 +779,6 @@ void pcibios_scan_specific_bus(int busn);
struct pci_bus *pci_find_bus(int domain, int busnr);
void pci_bus_add_devices(const struct pci_bus *bus);
struct pci_bus *pci_scan_bus(u32 dombus, struct pci_ops *ops, void *sysdata);
-struct pci_bus *pci_create_root_bus(struct device *parent, u32 dombus,
- struct pci_ops *ops, void *sysdata,
- struct list_head *resources);
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
void pci_bus_release_busn_res(struct pci_bus *b);
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 27/29] PCI: Export find_pci_host_bridge() and rename to pci_find_host_bridge()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (25 preceding siblings ...)
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 ` 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
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/host-bridge.c | 6 +++---
drivers/pci/pci.h | 2 ++
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index bc1de59..51f0a82 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -103,7 +103,7 @@ static struct pci_bus *find_pci_root_bus(struct pci_bus *bus)
return bus;
}
-static struct pci_host_bridge *find_pci_host_bridge(struct pci_bus *bus)
+struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus)
{
struct pci_bus *root_bus = find_pci_root_bus(bus);
@@ -121,7 +121,7 @@ void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
struct resource *res)
{
- struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
+ struct pci_host_bridge *bridge = pci_find_host_bridge(bus);
struct resource_entry *window;
resource_size_t offset = 0;
@@ -146,7 +146,7 @@ static bool region_contains(struct pci_bus_region *region1,
void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
struct pci_bus_region *region)
{
- struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
+ struct pci_host_bridge *bridge = pci_find_host_bridge(bus);
struct resource_entry *window;
resource_size_t offset = 0;
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 8bf5be7..ca9fc51 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -326,4 +326,6 @@ struct pci_host_bridge *pci_create_host_bridge(
void *sysdata, struct pci_host_bridge_ops *ops);
void pci_free_host_bridge(struct pci_host_bridge *host);
+struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
+
#endif /* DRIVERS_PCI_H */
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 28/29] PCI: Remove platform specific pci_domain_nr()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (26 preceding siblings ...)
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 ` Yijing Wang
2015-03-06 9:33 ` [PATCH v5 29/29] PCI: Remove pci_bus_assign_domain_nr() Yijing Wang
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Now pci_host_bridge holds the domain number,
so we could eliminate all platform specific
pci_domain_nr().
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
arch/alpha/include/asm/pci.h | 2 --
arch/ia64/include/asm/pci.h | 1 -
arch/microblaze/pci/pci-common.c | 11 -----------
arch/mips/include/asm/pci.h | 2 --
arch/powerpc/kernel/pci-common.c | 11 -----------
arch/s390/pci/pci.c | 6 ------
arch/sh/include/asm/pci.h | 2 --
arch/sparc/kernel/pci.c | 17 -----------------
arch/tile/include/asm/pci.h | 2 --
arch/x86/include/asm/pci.h | 6 ------
drivers/pci/pci.c | 8 ++++++++
include/linux/pci.h | 7 ++-----
12 files changed, 10 insertions(+), 65 deletions(-)
diff --git a/arch/alpha/include/asm/pci.h b/arch/alpha/include/asm/pci.h
index f7f680f..63a9a1e 100644
--- a/arch/alpha/include/asm/pci.h
+++ b/arch/alpha/include/asm/pci.h
@@ -95,8 +95,6 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
return channel ? 15 : 14;
}
-#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
-
static inline int pci_proc_domain(struct pci_bus *bus)
{
struct pci_controller *hose = bus->sysdata;
diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h
index 52af5ed..1dcea49 100644
--- a/arch/ia64/include/asm/pci.h
+++ b/arch/ia64/include/asm/pci.h
@@ -99,7 +99,6 @@ struct pci_controller {
#define PCI_CONTROLLER(busdev) ((struct pci_controller *) busdev->sysdata)
-#define pci_domain_nr(busdev) (PCI_CONTROLLER(busdev)->segment)
extern struct pci_ops pci_root_ops;
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index 34a32ec..8651089 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -123,17 +123,6 @@ unsigned long pci_address_to_pio(phys_addr_t address)
}
EXPORT_SYMBOL_GPL(pci_address_to_pio);
-/*
- * Return the domain number for this bus.
- */
-int pci_domain_nr(struct pci_bus *bus)
-{
- struct pci_controller *hose = pci_bus_to_host(bus);
-
- return hose->global_number;
-}
-EXPORT_SYMBOL(pci_domain_nr);
-
/* This routine is meant to be used early during boot, when the
* PCI bus numbers have not yet been assigned, and you need to
* issue PCI config cycles to an OF device.
diff --git a/arch/mips/include/asm/pci.h b/arch/mips/include/asm/pci.h
index 193b4c6..2e4d808 100644
--- a/arch/mips/include/asm/pci.h
+++ b/arch/mips/include/asm/pci.h
@@ -122,8 +122,6 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
#endif
#ifdef CONFIG_PCI_DOMAINS
-#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
-
static inline int pci_proc_domain(struct pci_bus *bus)
{
struct pci_controller *hose = bus->sysdata;
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 71f0077..5f0a8f7 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -181,17 +181,6 @@ unsigned long pci_address_to_pio(phys_addr_t address)
}
EXPORT_SYMBOL_GPL(pci_address_to_pio);
-/*
- * Return the domain number for this bus.
- */
-int pci_domain_nr(struct pci_bus *bus)
-{
- struct pci_controller *hose = pci_bus_to_host(bus);
-
- return hose->global_number;
-}
-EXPORT_SYMBOL(pci_domain_nr);
-
/* This routine is meant to be used early during boot, when the
* PCI bus numbers have not yet been assigned, and you need to
* issue PCI config cycles to an OF device.
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 20e662f..4823b0e 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -101,12 +101,6 @@ static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
}
-int pci_domain_nr(struct pci_bus *bus)
-{
- return ((struct zpci_dev *) bus->sysdata)->domain;
-}
-EXPORT_SYMBOL_GPL(pci_domain_nr);
-
int pci_proc_domain(struct pci_bus *bus)
{
return pci_domain_nr(bus);
diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h
index 5b45115..4dc3ad6 100644
--- a/arch/sh/include/asm/pci.h
+++ b/arch/sh/include/asm/pci.h
@@ -109,8 +109,6 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
/* Board-specific fixup routines. */
int pcibios_map_platform_irq(const struct pci_dev *dev, u8 slot, u8 pin);
-#define pci_domain_nr(bus) ((struct pci_channel *)(bus)->sysdata)->index
-
static inline int pci_proc_domain(struct pci_bus *bus)
{
struct pci_channel *hose = bus->sysdata;
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 7e28f74..b847d0c 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -902,23 +902,6 @@ int pcibus_to_node(struct pci_bus *pbus)
EXPORT_SYMBOL(pcibus_to_node);
#endif
-/* Return the domain number for this pci bus */
-
-int pci_domain_nr(struct pci_bus *pbus)
-{
- struct pci_pbm_info *pbm = pbus->sysdata;
- int ret;
-
- if (!pbm) {
- ret = -ENXIO;
- } else {
- ret = pbm->index;
- }
-
- return ret;
-}
-EXPORT_SYMBOL(pci_domain_nr);
-
#ifdef CONFIG_PCI_MSI
int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
{
diff --git a/arch/tile/include/asm/pci.h b/arch/tile/include/asm/pci.h
index dfedd7a..23a726e 100644
--- a/arch/tile/include/asm/pci.h
+++ b/arch/tile/include/asm/pci.h
@@ -199,8 +199,6 @@ int __init pcibios_init(void);
void pcibios_fixup_bus(struct pci_bus *bus);
-#define pci_domain_nr(bus) (((struct pci_controller *)(bus)->sysdata)->index)
-
/*
* This decides whether to display the domain number in /proc.
*/
diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
index 4e370a5..4fe0458 100644
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -29,12 +29,6 @@ extern int noioapicreroute;
#ifdef CONFIG_PCI
#ifdef CONFIG_PCI_DOMAINS
-static inline int pci_domain_nr(struct pci_bus *bus)
-{
- struct pci_sysdata *sd = bus->sysdata;
- return sd->domain;
-}
-
static inline int pci_proc_domain(struct pci_bus *bus)
{
return pci_domain_nr(bus);
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 0001896..dd8aebc 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4523,6 +4523,14 @@ int pci_get_new_domain_nr(void)
return atomic_inc_return(&__domain_nr);
}
+int pci_domain_nr(struct pci_bus *bus)
+{
+ struct pci_host_bridge *host = find_pci_host_bridge(bus);
+
+ return host->domain;
+}
+EXPORT_SYMBOL(pci_domain_nr);
+
#ifdef CONFIG_PCI_DOMAINS_GENERIC
static int pci_assign_domain_nr(struct device *dev)
{
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 5717b14..dc1c710 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1318,6 +1318,7 @@ void pci_cfg_access_unlock(struct pci_dev *dev);
#ifdef CONFIG_PCI_DOMAINS
extern int pci_domains_supported;
int pci_get_new_domain_nr(void);
+int pci_domain_nr(struct pci_bus *bus);
#else
enum { pci_domains_supported = 0 };
static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
@@ -1331,15 +1332,11 @@ static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
* domains then this implementation will be used
*/
#ifdef CONFIG_PCI_DOMAINS_GENERIC
-static inline int pci_domain_nr(struct pci_bus *bus)
-{
- return bus->domain_nr;
-}
void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent);
void pci_host_assign_domain_nr(struct pci_host_bridge *host);
#else
static inline void pci_bus_assign_domain_nr(struct pci_bus *bus,
- struct device *parent)
+ struct device *parent)
{
}
static inline void pci_host_assign_domain_nr(struct pci_host_bridge *host)
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v5 29/29] PCI: Remove pci_bus_assign_domain_nr()
2015-03-06 9:33 [PATCH v5 00/29] Refine PCI scan interfaces and make generic pci host bridge Yijing Wang
` (27 preceding siblings ...)
2015-03-06 9:33 ` [PATCH v5 28/29] PCI: Remove platform specific pci_domain_nr() Yijing Wang
@ 2015-03-06 9:33 ` Yijing Wang
28 siblings, 0 replies; 32+ messages in thread
From: Yijing Wang @ 2015-03-06 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Now we save the domain number in pci_host_bridge,
we could remove pci_bus_assign_domain_nr() and
clean the domain member in pci_bus.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/pci.c | 5 -----
drivers/pci/probe.c | 12 ++++--------
include/linux/pci.h | 3 ---
3 files changed, 4 insertions(+), 16 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index dd8aebc..a545d1e 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4581,11 +4581,6 @@ void pci_host_assign_domain_nr(struct pci_host_bridge *host)
{
host->domain = pci_assign_domain_nr(host->dev.parent);
}
-
-void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
-{
- bus->domain_nr = pci_assign_domain_nr(parent);
-}
#endif
#endif
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index aae911a..facb0e5 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -480,7 +480,7 @@ void pci_read_bridge_bases(struct pci_bus *child)
}
}
-static struct pci_bus *pci_alloc_bus(struct pci_bus *parent)
+static struct pci_bus *pci_alloc_bus(void)
{
struct pci_bus *b;
@@ -495,10 +495,7 @@ static struct pci_bus *pci_alloc_bus(struct pci_bus *parent)
INIT_LIST_HEAD(&b->resources);
b->max_bus_speed = PCI_SPEED_UNKNOWN;
b->cur_bus_speed = PCI_SPEED_UNKNOWN;
-#ifdef CONFIG_PCI_DOMAINS_GENERIC
- if (parent)
- b->domain_nr = parent->domain_nr;
-#endif
+
return b;
}
@@ -645,7 +642,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
/*
* Allocate a new bus, and inherit stuff from the parent..
*/
- child = pci_alloc_bus(parent);
+ child = pci_alloc_bus();
if (!child)
return NULL;
@@ -1865,14 +1862,13 @@ static struct pci_bus *pci_create_root_bus(
char *fmt;
parent = bridge->dev.parent;
- b = pci_alloc_bus(NULL);
+ b = pci_alloc_bus();
if (!b)
return NULL;
b->sysdata = dev_get_drvdata(&bridge->dev);
b->ops = ops;
b->number = b->busn_res.start = bridge->busnum;
- pci_bus_assign_domain_nr(b, parent);
bridge->bus = b;
b->bridge = get_device(&bridge->dev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index dc1c710..ebc70bb 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -467,9 +467,6 @@ struct pci_bus {
unsigned char primary; /* number of primary bridge */
unsigned char max_bus_speed; /* enum pci_bus_speed */
unsigned char cur_bus_speed; /* enum pci_bus_speed */
-#ifdef CONFIG_PCI_DOMAINS_GENERIC
- int domain_nr;
-#endif
char name[48];
--
1.7.1
^ permalink raw reply related [flat|nested] 32+ messages in thread