1*d164bf64SCai Huoqing // SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
24c1e4972SDennis Dalessandro /*
3d310c4bfSMichael J. Ruhl * Copyright(c) 2016 - 2019 Intel Corporation.
44c1e4972SDennis Dalessandro */
54c1e4972SDennis Dalessandro
6119a8e70SKamal Heib #include <linux/slab.h>
74c1e4972SDennis Dalessandro #include "ah.h"
8119a8e70SKamal Heib #include "vt.h" /* for prints */
9119a8e70SKamal Heib
10119a8e70SKamal Heib /**
11119a8e70SKamal Heib * rvt_check_ah - validate the attributes of AH
12119a8e70SKamal Heib * @ibdev: the ib device
13119a8e70SKamal Heib * @ah_attr: the attributes of the AH
1490793f71SDennis Dalessandro *
1590793f71SDennis Dalessandro * If driver supports a more detailed check_ah function call back to it
1690793f71SDennis Dalessandro * otherwise just check the basics.
1790793f71SDennis Dalessandro *
1890793f71SDennis Dalessandro * Return: 0 on success
19119a8e70SKamal Heib */
rvt_check_ah(struct ib_device * ibdev,struct rdma_ah_attr * ah_attr)20119a8e70SKamal Heib int rvt_check_ah(struct ib_device *ibdev,
2190898850SDasaratharaman Chandramouli struct rdma_ah_attr *ah_attr)
22119a8e70SKamal Heib {
23119a8e70SKamal Heib int err;
24d8966fcdSDasaratharaman Chandramouli int port_num = rdma_ah_get_port_num(ah_attr);
25119a8e70SKamal Heib struct ib_port_attr port_attr;
26119a8e70SKamal Heib struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
27d8966fcdSDasaratharaman Chandramouli u8 ah_flags = rdma_ah_get_ah_flags(ah_attr);
28d8966fcdSDasaratharaman Chandramouli u8 static_rate = rdma_ah_get_static_rate(ah_attr);
29119a8e70SKamal Heib
30d8966fcdSDasaratharaman Chandramouli err = ib_query_port(ibdev, port_num, &port_attr);
31119a8e70SKamal Heib if (err)
32119a8e70SKamal Heib return -EINVAL;
33d8966fcdSDasaratharaman Chandramouli if (port_num < 1 ||
34d8966fcdSDasaratharaman Chandramouli port_num > ibdev->phys_port_cnt)
35119a8e70SKamal Heib return -EINVAL;
36d8966fcdSDasaratharaman Chandramouli if (static_rate != IB_RATE_PORT_CURRENT &&
37d8966fcdSDasaratharaman Chandramouli ib_rate_to_mbps(static_rate) < 0)
38119a8e70SKamal Heib return -EINVAL;
39d8966fcdSDasaratharaman Chandramouli if ((ah_flags & IB_AH_GRH) &&
40d8966fcdSDasaratharaman Chandramouli rdma_ah_read_grh(ah_attr)->sgid_index >= port_attr.gid_tbl_len)
41119a8e70SKamal Heib return -EINVAL;
42b036db83SDennis Dalessandro if (rdi->driver_f.check_ah)
43b036db83SDennis Dalessandro return rdi->driver_f.check_ah(ibdev, ah_attr);
44119a8e70SKamal Heib return 0;
45119a8e70SKamal Heib }
46119a8e70SKamal Heib EXPORT_SYMBOL(rvt_check_ah);
474c1e4972SDennis Dalessandro
484c1e4972SDennis Dalessandro /**
494c1e4972SDennis Dalessandro * rvt_create_ah - create an address handle
50d3456914SLeon Romanovsky * @ibah: the IB address handle
5111708142SColton Lewis * @init_attr: the attributes of the AH
524f32fb92SKamal Heib * @udata: pointer to user's input output buffer information.
534c1e4972SDennis Dalessandro *
544c1e4972SDennis Dalessandro * This may be called from interrupt context.
5590793f71SDennis Dalessandro *
56d3456914SLeon Romanovsky * Return: 0 on success
574c1e4972SDennis Dalessandro */
rvt_create_ah(struct ib_ah * ibah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)58fa5d010cSMaor Gottlieb int rvt_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
59fa5d010cSMaor Gottlieb struct ib_udata *udata)
604c1e4972SDennis Dalessandro {
61d3456914SLeon Romanovsky struct rvt_ah *ah = ibah_to_rvtah(ibah);
62d3456914SLeon Romanovsky struct rvt_dev_info *dev = ib_to_rvt(ibah->device);
63119a8e70SKamal Heib unsigned long flags;
64119a8e70SKamal Heib
65fa5d010cSMaor Gottlieb if (rvt_check_ah(ibah->device, init_attr->ah_attr))
66d3456914SLeon Romanovsky return -EINVAL;
67119a8e70SKamal Heib
68119a8e70SKamal Heib spin_lock_irqsave(&dev->n_ahs_lock, flags);
69119a8e70SKamal Heib if (dev->n_ahs_allocated == dev->dparms.props.max_ah) {
70f0bb2d44SDan Carpenter spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
71d3456914SLeon Romanovsky return -ENOMEM;
72119a8e70SKamal Heib }
73119a8e70SKamal Heib
74119a8e70SKamal Heib dev->n_ahs_allocated++;
75119a8e70SKamal Heib spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
76119a8e70SKamal Heib
77fa5d010cSMaor Gottlieb rdma_copy_ah_attr(&ah->attr, init_attr->ah_attr);
78d97099feSJason Gunthorpe
79b036db83SDennis Dalessandro if (dev->driver_f.notify_new_ah)
80fa5d010cSMaor Gottlieb dev->driver_f.notify_new_ah(ibah->device,
81fa5d010cSMaor Gottlieb init_attr->ah_attr, ah);
82b036db83SDennis Dalessandro
83d3456914SLeon Romanovsky return 0;
844c1e4972SDennis Dalessandro }
854c1e4972SDennis Dalessandro
8690793f71SDennis Dalessandro /**
872988ca08SMauro Carvalho Chehab * rvt_destroy_ah - Destroy an address handle
8890793f71SDennis Dalessandro * @ibah: address handle
892553ba21SGal Pressman * @destroy_flags: destroy address handle flags (see enum rdma_destroy_ah_flags)
9090793f71SDennis Dalessandro * Return: 0 on success
9190793f71SDennis Dalessandro */
rvt_destroy_ah(struct ib_ah * ibah,u32 destroy_flags)929a9ebf8cSLeon Romanovsky int rvt_destroy_ah(struct ib_ah *ibah, u32 destroy_flags)
934c1e4972SDennis Dalessandro {
94119a8e70SKamal Heib struct rvt_dev_info *dev = ib_to_rvt(ibah->device);
95119a8e70SKamal Heib struct rvt_ah *ah = ibah_to_rvtah(ibah);
96119a8e70SKamal Heib unsigned long flags;
97119a8e70SKamal Heib
98119a8e70SKamal Heib spin_lock_irqsave(&dev->n_ahs_lock, flags);
99119a8e70SKamal Heib dev->n_ahs_allocated--;
100119a8e70SKamal Heib spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
101119a8e70SKamal Heib
102d97099feSJason Gunthorpe rdma_destroy_ah_attr(&ah->attr);
1039a9ebf8cSLeon Romanovsky return 0;
1044c1e4972SDennis Dalessandro }
1054c1e4972SDennis Dalessandro
10690793f71SDennis Dalessandro /**
10790793f71SDennis Dalessandro * rvt_modify_ah - modify an ah with given attrs
10890793f71SDennis Dalessandro * @ibah: address handle to modify
10990793f71SDennis Dalessandro * @ah_attr: attrs to apply
11090793f71SDennis Dalessandro *
11190793f71SDennis Dalessandro * Return: 0 on success
11290793f71SDennis Dalessandro */
rvt_modify_ah(struct ib_ah * ibah,struct rdma_ah_attr * ah_attr)11390898850SDasaratharaman Chandramouli int rvt_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
1144c1e4972SDennis Dalessandro {
115119a8e70SKamal Heib struct rvt_ah *ah = ibah_to_rvtah(ibah);
116119a8e70SKamal Heib
117119a8e70SKamal Heib if (rvt_check_ah(ibah->device, ah_attr))
118119a8e70SKamal Heib return -EINVAL;
119119a8e70SKamal Heib
120119a8e70SKamal Heib ah->attr = *ah_attr;
121119a8e70SKamal Heib
122119a8e70SKamal Heib return 0;
1234c1e4972SDennis Dalessandro }
1244c1e4972SDennis Dalessandro
12590793f71SDennis Dalessandro /**
12690793f71SDennis Dalessandro * rvt_query_ah - return attrs for ah
12790793f71SDennis Dalessandro * @ibah: address handle to query
12890793f71SDennis Dalessandro * @ah_attr: return info in this
12990793f71SDennis Dalessandro *
13090793f71SDennis Dalessandro * Return: always 0
13190793f71SDennis Dalessandro */
rvt_query_ah(struct ib_ah * ibah,struct rdma_ah_attr * ah_attr)13290898850SDasaratharaman Chandramouli int rvt_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
1334c1e4972SDennis Dalessandro {
134119a8e70SKamal Heib struct rvt_ah *ah = ibah_to_rvtah(ibah);
135119a8e70SKamal Heib
136119a8e70SKamal Heib *ah_attr = ah->attr;
137119a8e70SKamal Heib
138119a8e70SKamal Heib return 0;
1394c1e4972SDennis Dalessandro }
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