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RDMA/core: Introduce ib_core_device to hold device 

In order to support sysfs entries in multiple net namespaces for a rdma
device, introduce a ib_core_device whose scope is limited to hold core
device and per port sysfs related entries.

This is preparation patch so that multiple ib_core_devices in each net
namespace can be created in subsequent patch who all can share ib_device.

(a) Move sysfs specific fields to ib_core_device.
(b) Make sysfs and device life cycle related routines to work on
    ib_core_device.
(c) Introduce and use rdma_init_coredev() helper to initialize
    coredev fields.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Parav Pandit 2019-02-26 13:56:11 +02:00 committed by Jason Gunthorpe
parent 629e6f9db6
commit cebe556bd7
3 changed files with 55 additions and 23 deletions
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24
drivers/infiniband/core/device.c
View File

@ -363,6 +363,25 @@ static struct class ib_class = {
.dev_uevent = ib_device_uevent,
};
static void rdma_init_coredev(struct ib_core_device *coredev,
struct ib_device *dev)
{
/* This BUILD_BUG_ON is intended to catch layout change
* of union of ib_core_device and device.
* dev must be the first element as ib_core and providers
* driver uses it. Adding anything in ib_core_device before
* device will break this assumption.
*/
BUILD_BUG_ON(offsetof(struct ib_device, coredev.dev) !=
offsetof(struct ib_device, dev));
coredev->dev.class = &ib_class;
coredev->dev.groups = dev->groups;
device_initialize(&coredev->dev);
coredev->owner = dev;
INIT_LIST_HEAD(&coredev->port_list);
}
/**
* _ib_alloc_device - allocate an IB device struct
* @size:size of structure to allocate
@ -389,10 +408,8 @@ struct ib_device *_ib_alloc_device(size_t size)
return NULL;
}
device->dev.class = &ib_class;
device->groups[0] = &ib_dev_attr_group;
device->dev.groups = device->groups;
device_initialize(&device->dev);
rdma_init_coredev(&device->coredev, device);
INIT_LIST_HEAD(&device->event_handler_list);
spin_lock_init(&device->event_handler_lock);
@ -403,7 +420,6 @@ struct ib_device *_ib_alloc_device(size_t size)
*/
xa_init_flags(&device->client_data, XA_FLAGS_ALLOC);
init_rwsem(&device->client_data_rwsem);
INIT_LIST_HEAD(&device->port_list);
init_completion(&device->unreg_completion);
INIT_WORK(&device->unregistration_work, ib_unregister_work);

29
drivers/infiniband/core/sysfs.c
View File

@ -1015,8 +1015,9 @@ err_free_stats:
return;
}
static int add_port(struct ib_device *device, int port_num)
static int add_port(struct ib_core_device *coredev, int port_num)
{
struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
struct ib_port *p;
struct ib_port_attr attr;
int i;
@ -1034,7 +1035,7 @@ static int add_port(struct ib_device *device, int port_num)
p->port_num = port_num;
ret = kobject_init_and_add(&p->kobj, &port_type,
device->ports_kobj,
coredev->ports_kobj,
"%d", port_num);
if (ret) {
kfree(p);
@ -1125,7 +1126,7 @@ static int add_port(struct ib_device *device, int port_num)
if (device->ops.alloc_hw_stats && port_num)
setup_hw_stats(device, p, port_num);
list_add_tail(&p->kobj.entry, &device->port_list);
list_add_tail(&p->kobj.entry, &coredev->port_list);
kobject_uevent(&p->kobj, KOBJ_ADD);
return 0;
@ -1279,11 +1280,11 @@ const struct attribute_group ib_dev_attr_group = {
.attrs = ib_dev_attrs,
};
static void ib_free_port_attrs(struct ib_device *device)
static void ib_free_port_attrs(struct ib_core_device *coredev)
{
struct kobject *p, *t;
list_for_each_entry_safe(p, t, &device->port_list, entry) {
list_for_each_entry_safe(p, t, &coredev->port_list, entry) {
struct ib_port *port = container_of(p, struct ib_port, kobj);
list_del(&p->entry);
@ -1303,20 +1304,22 @@ static void ib_free_port_attrs(struct ib_device *device)
kobject_put(p);
}
kobject_put(device->ports_kobj);
kobject_put(coredev->ports_kobj);
}
static int ib_setup_port_attrs(struct ib_device *device)
static int ib_setup_port_attrs(struct ib_core_device *coredev)
{
struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
unsigned int port;
int ret;
device->ports_kobj = kobject_create_and_add("ports", &device->dev.kobj);
if (!device->ports_kobj)
coredev->ports_kobj = kobject_create_and_add("ports",
&coredev->dev.kobj);
if (!coredev->ports_kobj)
return -ENOMEM;
rdma_for_each_port (device, port) {
ret = add_port(device, port);
ret = add_port(coredev, port);
if (ret)
goto err_put;
}
@ -1324,7 +1327,7 @@ static int ib_setup_port_attrs(struct ib_device *device)
return 0;
err_put:
ib_free_port_attrs(device);
ib_free_port_attrs(coredev);
return ret;
}
@ -1332,7 +1335,7 @@ int ib_device_register_sysfs(struct ib_device *device)
{
int ret;
ret = ib_setup_port_attrs(device);
ret = ib_setup_port_attrs(&device->coredev);
if (ret)
return ret;
@ -1348,5 +1351,5 @@ void ib_device_unregister_sysfs(struct ib_device *device)
free_hsag(&device->dev.kobj, device->hw_stats_ag);
kfree(device->hw_stats);
ib_free_port_attrs(device);
ib_free_port_attrs(&device->coredev);
}

25
include/rdma/ib_verbs.h
View File

@ -2554,8 +2554,17 @@ struct ib_device_ops {
DECLARE_RDMA_OBJ_SIZE(ib_ucontext);
};
struct rdma_restrack_root;
struct ib_core_device {
/* device must be the first element in structure until,
* union of ib_core_device and device exists in ib_device.
*/
struct device dev;
struct kobject *ports_kobj;
struct list_head port_list;
struct ib_device *owner; /* reach back to owner ib_device */
};
struct rdma_restrack_root;
struct ib_device {
/* Do not access @dma_device directly from ULP nor from HW drivers. */
struct device *dma_device;
@ -2581,16 +2590,17 @@ struct ib_device {
struct iw_cm_verbs *iwcm;
struct module *owner;
struct device dev;
union {
struct device dev;
struct ib_core_device coredev;
};
/* First group for device attributes,
* Second group for driver provided attributes (optional).
* It is NULL terminated array.
*/
const struct attribute_group *groups[3];
struct kobject *ports_kobj;
struct list_head port_list;
int uverbs_abi_ver;
u64 uverbs_cmd_mask;
u64 uverbs_ex_cmd_mask;
@ -4349,7 +4359,10 @@ rdma_set_device_sysfs_group(struct ib_device *dev,
*/
static inline struct ib_device *rdma_device_to_ibdev(struct device *device)
{
return container_of(device, struct ib_device, dev);
struct ib_core_device *coredev =
container_of(device, struct ib_core_device, dev);
return coredev->owner;
}
/**