| Message ID | 1394020137-1830-5-git-send-email-Liviu.Dudau@arm.com |
|---|---|
| State | New |
| Headers | show |
On Wed, 5 Mar 2014 11:48:55 +0000, Liviu Dudau <Liviu.Dudau@arm.com> wrote: > Make it easier to discover the domain number of a bus by storing > the number in pci_host_bridge for the root bus. Several architectures > have their own way of storing this information, so it makes sense > to try to unify the code. While at this, add a new function that > creates a root bus in a given domain and make pci_create_root_bus() > a wrapper around this function. > > Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com> > Tested-by: Tanmay Inamdar <tinamdar@apm.com> Looks okay to me structure wise, again I'd like an ack from Ben or Arnd. g. > --- > drivers/pci/probe.c | 41 +++++++++++++++++++++++++++++++++-------- > include/linux/pci.h | 4 ++++ > 2 files changed, 37 insertions(+), 8 deletions(-) > > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c > index fd11c12..172c615 100644 > --- a/drivers/pci/probe.c > +++ b/drivers/pci/probe.c > @@ -1714,8 +1714,9 @@ void __weak pcibios_remove_bus(struct pci_bus *bus) > { > } > > -struct pci_bus *pci_create_root_bus(struct device *parent, int bus, > - struct pci_ops *ops, void *sysdata, struct list_head *resources) > +struct pci_bus *pci_create_root_bus_in_domain(struct device *parent, > + int domain, int bus, struct pci_ops *ops, void *sysdata, > + struct list_head *resources) > { > int error; > struct pci_host_bridge *bridge; > @@ -1728,30 +1729,34 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, > > bridge = pci_alloc_host_bridge(); > if (!bridge) > - return NULL; > + return ERR_PTR(-ENOMEM); > > bridge->dev.parent = parent; > bridge->dev.release = pci_release_host_bridge_dev; > + bridge->domain_nr = domain; > error = pcibios_root_bridge_prepare(bridge); > if (error) > goto err_out; > > b = pci_alloc_bus(); > - if (!b) > + if (!b) { > + error = -ENOMEM; > goto err_out; > + } > > b->sysdata = sysdata; > b->ops = ops; > b->number = b->busn_res.start = bus; > - b2 = pci_find_bus(pci_domain_nr(b), bus); > + b2 = pci_find_bus(bridge->domain_nr, bus); > if (b2) { > /* If we already got to this bus through a different bridge, ignore it */ > dev_dbg(&b2->dev, "bus already known\n"); > + error = -EEXIST; > goto err_bus_out; > } > > bridge->bus = b; > - dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus); > + dev_set_name(&bridge->dev, "pci%04x:%02x", bridge->domain_nr, bus); > error = device_register(&bridge->dev); > if (error) { > put_device(&bridge->dev); > @@ -1766,7 +1771,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, > > 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_nr, bus); > error = device_register(&b->dev); > if (error) > goto class_dev_reg_err; > @@ -1816,7 +1821,27 @@ err_bus_out: > kfree(b); > err_out: > kfree(bridge); > - return NULL; > + return ERR_PTR(error); > +} > + > +struct pci_bus *pci_create_root_bus(struct device *parent, int bus, > + struct pci_ops *ops, void *sysdata, struct list_head *resources) > +{ > + int domain_nr; > + struct pci_bus *b = pci_alloc_bus(); > + if (!b) > + return NULL; > + > + b->sysdata = sysdata; > + domain_nr = pci_domain_nr(b); > + kfree(b); > + > + b = pci_create_root_bus_in_domain(parent, domain_nr, bus, > + ops, sysdata, resources); > + if (IS_ERR(b)) > + return NULL; > + > + return b; > } > > int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max) > diff --git a/include/linux/pci.h b/include/linux/pci.h > index 33aa2ca..1eed009 100644 > --- a/include/linux/pci.h > +++ b/include/linux/pci.h > @@ -394,6 +394,7 @@ struct pci_host_bridge_window { > struct pci_host_bridge { > struct device dev; > struct pci_bus *bus; /* root bus */ > + int domain_nr; > struct list_head windows; /* pci_host_bridge_windows */ > void (*release_fn)(struct pci_host_bridge *); > void *release_data; > @@ -747,6 +748,9 @@ 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, > struct list_head *resources); > +struct pci_bus *pci_create_root_bus_in_domain(struct device *parent, > + int domain, int bus, 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); > -- > 1.9.0 > > > _______________________________________________ > linaro-kernel mailing list > linaro-kernel@lists.linaro.org > http://lists.linaro.org/mailman/listinfo/linaro-kernel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index fd11c12..172c615 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1714,8 +1714,9 @@ void __weak pcibios_remove_bus(struct pci_bus *bus) { } -struct pci_bus *pci_create_root_bus(struct device *parent, int bus, - struct pci_ops *ops, void *sysdata, struct list_head *resources) +struct pci_bus *pci_create_root_bus_in_domain(struct device *parent, + int domain, int bus, struct pci_ops *ops, void *sysdata, + struct list_head *resources) { int error; struct pci_host_bridge *bridge; @@ -1728,30 +1729,34 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, bridge = pci_alloc_host_bridge(); if (!bridge) - return NULL; + return ERR_PTR(-ENOMEM); bridge->dev.parent = parent; bridge->dev.release = pci_release_host_bridge_dev; + bridge->domain_nr = domain; error = pcibios_root_bridge_prepare(bridge); if (error) goto err_out; b = pci_alloc_bus(); - if (!b) + if (!b) { + error = -ENOMEM; goto err_out; + } b->sysdata = sysdata; b->ops = ops; b->number = b->busn_res.start = bus; - b2 = pci_find_bus(pci_domain_nr(b), bus); + b2 = pci_find_bus(bridge->domain_nr, bus); if (b2) { /* If we already got to this bus through a different bridge, ignore it */ dev_dbg(&b2->dev, "bus already known\n"); + error = -EEXIST; goto err_bus_out; } bridge->bus = b; - dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus); + dev_set_name(&bridge->dev, "pci%04x:%02x", bridge->domain_nr, bus); error = device_register(&bridge->dev); if (error) { put_device(&bridge->dev); @@ -1766,7 +1771,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, 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_nr, bus); error = device_register(&b->dev); if (error) goto class_dev_reg_err; @@ -1816,7 +1821,27 @@ err_bus_out: kfree(b); err_out: kfree(bridge); - return NULL; + return ERR_PTR(error); +} + +struct pci_bus *pci_create_root_bus(struct device *parent, int bus, + struct pci_ops *ops, void *sysdata, struct list_head *resources) +{ + int domain_nr; + struct pci_bus *b = pci_alloc_bus(); + if (!b) + return NULL; + + b->sysdata = sysdata; + domain_nr = pci_domain_nr(b); + kfree(b); + + b = pci_create_root_bus_in_domain(parent, domain_nr, bus, + ops, sysdata, resources); + if (IS_ERR(b)) + return NULL; + + return b; } int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max) diff --git a/include/linux/pci.h b/include/linux/pci.h index 33aa2ca..1eed009 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -394,6 +394,7 @@ struct pci_host_bridge_window { struct pci_host_bridge { struct device dev; struct pci_bus *bus; /* root bus */ + int domain_nr; struct list_head windows; /* pci_host_bridge_windows */ void (*release_fn)(struct pci_host_bridge *); void *release_data; @@ -747,6 +748,9 @@ 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, struct list_head *resources); +struct pci_bus *pci_create_root_bus_in_domain(struct device *parent, + int domain, int bus, 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);