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3ec648c631
Documentation/process/license-rules.rst and checkpatch expect the SPDX identifier syntax for multiple licenses to use capital "OR". Correct it to keep consistent format and avoid copy-paste issues. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20230823092912.122674-1-krzysztof.kozlowski@linaro.org Signed-off-by: Leon Romanovsky <leon@kernel.org>
139 lines
3.3 KiB
C
139 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Copyright(c) 2016 - 2019 Intel Corporation.
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*/
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#include <linux/slab.h>
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#include "ah.h"
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#include "vt.h" /* for prints */
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/**
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* rvt_check_ah - validate the attributes of AH
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* @ibdev: the ib device
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* @ah_attr: the attributes of the AH
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*
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* If driver supports a more detailed check_ah function call back to it
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* otherwise just check the basics.
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*
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* Return: 0 on success
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*/
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int rvt_check_ah(struct ib_device *ibdev,
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struct rdma_ah_attr *ah_attr)
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{
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int err;
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int port_num = rdma_ah_get_port_num(ah_attr);
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struct ib_port_attr port_attr;
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struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
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u8 ah_flags = rdma_ah_get_ah_flags(ah_attr);
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u8 static_rate = rdma_ah_get_static_rate(ah_attr);
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err = ib_query_port(ibdev, port_num, &port_attr);
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if (err)
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return -EINVAL;
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if (port_num < 1 ||
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port_num > ibdev->phys_port_cnt)
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return -EINVAL;
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if (static_rate != IB_RATE_PORT_CURRENT &&
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ib_rate_to_mbps(static_rate) < 0)
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return -EINVAL;
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if ((ah_flags & IB_AH_GRH) &&
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rdma_ah_read_grh(ah_attr)->sgid_index >= port_attr.gid_tbl_len)
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return -EINVAL;
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if (rdi->driver_f.check_ah)
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return rdi->driver_f.check_ah(ibdev, ah_attr);
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return 0;
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}
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EXPORT_SYMBOL(rvt_check_ah);
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/**
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* rvt_create_ah - create an address handle
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* @ibah: the IB address handle
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* @init_attr: the attributes of the AH
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* @udata: pointer to user's input output buffer information.
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*
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* This may be called from interrupt context.
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*
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* Return: 0 on success
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*/
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int rvt_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
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struct ib_udata *udata)
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{
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struct rvt_ah *ah = ibah_to_rvtah(ibah);
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struct rvt_dev_info *dev = ib_to_rvt(ibah->device);
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unsigned long flags;
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if (rvt_check_ah(ibah->device, init_attr->ah_attr))
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return -EINVAL;
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spin_lock_irqsave(&dev->n_ahs_lock, flags);
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if (dev->n_ahs_allocated == dev->dparms.props.max_ah) {
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spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
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return -ENOMEM;
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}
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dev->n_ahs_allocated++;
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spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
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rdma_copy_ah_attr(&ah->attr, init_attr->ah_attr);
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if (dev->driver_f.notify_new_ah)
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dev->driver_f.notify_new_ah(ibah->device,
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init_attr->ah_attr, ah);
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return 0;
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}
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/**
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* rvt_destroy_ah - Destroy an address handle
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* @ibah: address handle
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* @destroy_flags: destroy address handle flags (see enum rdma_destroy_ah_flags)
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* Return: 0 on success
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*/
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int rvt_destroy_ah(struct ib_ah *ibah, u32 destroy_flags)
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{
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struct rvt_dev_info *dev = ib_to_rvt(ibah->device);
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struct rvt_ah *ah = ibah_to_rvtah(ibah);
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unsigned long flags;
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spin_lock_irqsave(&dev->n_ahs_lock, flags);
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dev->n_ahs_allocated--;
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spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
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rdma_destroy_ah_attr(&ah->attr);
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return 0;
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}
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/**
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* rvt_modify_ah - modify an ah with given attrs
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* @ibah: address handle to modify
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* @ah_attr: attrs to apply
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*
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* Return: 0 on success
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*/
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int rvt_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
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{
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struct rvt_ah *ah = ibah_to_rvtah(ibah);
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if (rvt_check_ah(ibah->device, ah_attr))
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return -EINVAL;
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ah->attr = *ah_attr;
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return 0;
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}
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/**
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* rvt_query_ah - return attrs for ah
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* @ibah: address handle to query
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* @ah_attr: return info in this
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*
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* Return: always 0
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*/
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int rvt_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
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{
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struct rvt_ah *ah = ibah_to_rvtah(ibah);
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*ah_attr = ah->attr;
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return 0;
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}
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