1fb7f8973f
Current code uses many different types when dealing with a port of a RDMA device: u8, unsigned int and u32. Switch to u32 to clean up the logic. This allows us to make (at least) the core view consistent and use the same type. Unfortunately not all places can be converted. Many uverbs functions expect port to be u8 so keep those places in order not to break UAPIs. HW/Spec defined values must also not be changed. With the switch to u32 we now can support devices with more than 255 ports. U32_MAX is reserved to make control logic a bit easier to deal with. As a device with U32_MAX ports probably isn't going to happen any time soon this seems like a non issue. When a device with more than 255 ports is created uverbs will report the RDMA device as having 255 ports as this is the max currently supported. The verbs interface is not changed yet because the IBTA spec limits the port size in too many places to be u8 and all applications that relies in verbs won't be able to cope with this change. At this stage, we are extending the interfaces that are using vendor channel solely Once the limitation is lifted mlx5 in switchdev mode will be able to have thousands of SFs created by the device. As the only instance of an RDMA device that reports more than 255 ports will be a representor device and it exposes itself as a RAW Ethernet only device CM/MAD/IPoIB and other ULPs aren't effected by this change and their sysfs/interfaces that are exposes to userspace can remain unchanged. While here cleanup some alignment issues and remove unneeded sanity checks (mainly in rdmavt), Link: https://lore.kernel.org/r/20210301070420.439400-1-leon@kernel.org Signed-off-by: Mark Bloch <mbloch@nvidia.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
118 lines
4.2 KiB
C
118 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Intel Corporation. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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*/
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#ifndef _IB_CACHE_H
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#define _IB_CACHE_H
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#include <rdma/ib_verbs.h>
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int rdma_query_gid(struct ib_device *device, u32 port_num, int index,
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union ib_gid *gid);
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void *rdma_read_gid_hw_context(const struct ib_gid_attr *attr);
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const struct ib_gid_attr *rdma_find_gid(struct ib_device *device,
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const union ib_gid *gid,
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enum ib_gid_type gid_type,
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struct net_device *ndev);
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const struct ib_gid_attr *rdma_find_gid_by_port(struct ib_device *ib_dev,
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const union ib_gid *gid,
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enum ib_gid_type gid_type,
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u32 port,
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struct net_device *ndev);
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const struct ib_gid_attr *rdma_find_gid_by_filter(
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struct ib_device *device, const union ib_gid *gid, u32 port_num,
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bool (*filter)(const union ib_gid *gid, const struct ib_gid_attr *,
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void *),
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void *context);
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int rdma_read_gid_l2_fields(const struct ib_gid_attr *attr,
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u16 *vlan_id, u8 *smac);
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struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr);
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/**
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* ib_get_cached_pkey - Returns a cached PKey table entry
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* @device: The device to query.
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* @port_num: The port number of the device to query.
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* @index: The index into the cached PKey table to query.
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* @pkey: The PKey value found at the specified index.
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*
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* ib_get_cached_pkey() fetches the specified PKey table entry stored in
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* the local software cache.
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*/
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int ib_get_cached_pkey(struct ib_device *device_handle,
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u32 port_num,
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int index,
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u16 *pkey);
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/**
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* ib_find_cached_pkey - Returns the PKey table index where a specified
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* PKey value occurs.
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* @device: The device to query.
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* @port_num: The port number of the device to search for the PKey.
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* @pkey: The PKey value to search for.
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* @index: The index into the cached PKey table where the PKey was found.
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*
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* ib_find_cached_pkey() searches the specified PKey table in
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* the local software cache.
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*/
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int ib_find_cached_pkey(struct ib_device *device,
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u32 port_num,
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u16 pkey,
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u16 *index);
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/**
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* ib_find_exact_cached_pkey - Returns the PKey table index where a specified
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* PKey value occurs. Comparison uses the FULL 16 bits (incl membership bit)
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* @device: The device to query.
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* @port_num: The port number of the device to search for the PKey.
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* @pkey: The PKey value to search for.
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* @index: The index into the cached PKey table where the PKey was found.
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*
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* ib_find_exact_cached_pkey() searches the specified PKey table in
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* the local software cache.
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*/
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int ib_find_exact_cached_pkey(struct ib_device *device,
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u32 port_num,
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u16 pkey,
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u16 *index);
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/**
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* ib_get_cached_lmc - Returns a cached lmc table entry
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* @device: The device to query.
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* @port_num: The port number of the device to query.
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* @lmc: The lmc value for the specified port for that device.
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*
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* ib_get_cached_lmc() fetches the specified lmc table entry stored in
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* the local software cache.
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*/
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int ib_get_cached_lmc(struct ib_device *device,
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u32 port_num,
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u8 *lmc);
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/**
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* ib_get_cached_port_state - Returns a cached port state table entry
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* @device: The device to query.
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* @port_num: The port number of the device to query.
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* @port_state: port_state for the specified port for that device.
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*
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* ib_get_cached_port_state() fetches the specified port_state table entry stored in
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* the local software cache.
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*/
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int ib_get_cached_port_state(struct ib_device *device,
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u32 port_num,
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enum ib_port_state *port_active);
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bool rdma_is_zero_gid(const union ib_gid *gid);
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const struct ib_gid_attr *rdma_get_gid_attr(struct ib_device *device,
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u32 port_num, int index);
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void rdma_put_gid_attr(const struct ib_gid_attr *attr);
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void rdma_hold_gid_attr(const struct ib_gid_attr *attr);
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ssize_t rdma_query_gid_table(struct ib_device *device,
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struct ib_uverbs_gid_entry *entries,
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size_t max_entries);
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#endif /* _IB_CACHE_H */
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