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139 lines
3.3 KiB
139 lines
3.3 KiB
// 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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