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path: root/drivers/infiniband/hw/mlx4/ah.c
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Diffstat (limited to 'drivers/infiniband/hw/mlx4/ah.c')
-rw-r--r--drivers/infiniband/hw/mlx4/ah.c163
1 files changed, 130 insertions, 33 deletions
diff --git a/drivers/infiniband/hw/mlx4/ah.c b/drivers/infiniband/hw/mlx4/ah.c
index 11a236f8d884..4b8f9c49397e 100644
--- a/drivers/infiniband/hw/mlx4/ah.c
+++ b/drivers/infiniband/hw/mlx4/ah.c
@@ -30,66 +30,163 @@
30 * SOFTWARE. 30 * SOFTWARE.
31 */ 31 */
32 32
33#include <rdma/ib_addr.h>
34#include <rdma/ib_cache.h>
35
33#include <linux/slab.h> 36#include <linux/slab.h>
37#include <linux/inet.h>
38#include <linux/string.h>
34 39
35#include "mlx4_ib.h" 40#include "mlx4_ib.h"
36 41
37struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) 42int mlx4_ib_resolve_grh(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah_attr,
43 u8 *mac, int *is_mcast, u8 port)
38{ 44{
39 struct mlx4_dev *dev = to_mdev(pd->device)->dev; 45 struct in6_addr in6;
40 struct mlx4_ib_ah *ah;
41 46
42 ah = kmalloc(sizeof *ah, GFP_ATOMIC); 47 *is_mcast = 0;
43 if (!ah)
44 return ERR_PTR(-ENOMEM);
45 48
46 memset(&ah->av, 0, sizeof ah->av); 49 memcpy(&in6, ah_attr->grh.dgid.raw, sizeof in6);
50 if (rdma_link_local_addr(&in6))
51 rdma_get_ll_mac(&in6, mac);
52 else if (rdma_is_multicast_addr(&in6)) {
53 rdma_get_mcast_mac(&in6, mac);
54 *is_mcast = 1;
55 } else
56 return -EINVAL;
47 57
48 ah->av.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24)); 58 return 0;
49 ah->av.g_slid = ah_attr->src_path_bits; 59}
50 ah->av.dlid = cpu_to_be16(ah_attr->dlid); 60
51 if (ah_attr->static_rate) { 61static struct ib_ah *create_ib_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr,
52 ah->av.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET; 62 struct mlx4_ib_ah *ah)
53 while (ah->av.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && 63{
54 !(1 << ah->av.stat_rate & dev->caps.stat_rate_support)) 64 struct mlx4_dev *dev = to_mdev(pd->device)->dev;
55 --ah->av.stat_rate; 65
56 } 66 ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
57 ah->av.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28); 67 ah->av.ib.g_slid = ah_attr->src_path_bits;
58 if (ah_attr->ah_flags & IB_AH_GRH) { 68 if (ah_attr->ah_flags & IB_AH_GRH) {
59 ah->av.g_slid |= 0x80; 69 ah->av.ib.g_slid |= 0x80;
60 ah->av.gid_index = ah_attr->grh.sgid_index; 70 ah->av.ib.gid_index = ah_attr->grh.sgid_index;
61 ah->av.hop_limit = ah_attr->grh.hop_limit; 71 ah->av.ib.hop_limit = ah_attr->grh.hop_limit;
62 ah->av.sl_tclass_flowlabel |= 72 ah->av.ib.sl_tclass_flowlabel |=
63 cpu_to_be32((ah_attr->grh.traffic_class << 20) | 73 cpu_to_be32((ah_attr->grh.traffic_class << 20) |
64 ah_attr->grh.flow_label); 74 ah_attr->grh.flow_label);
65 memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, 16); 75 memcpy(ah->av.ib.dgid, ah_attr->grh.dgid.raw, 16);
76 }
77
78 ah->av.ib.dlid = cpu_to_be16(ah_attr->dlid);
79 if (ah_attr->static_rate) {
80 ah->av.ib.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
81 while (ah->av.ib.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
82 !(1 << ah->av.ib.stat_rate & dev->caps.stat_rate_support))
83 --ah->av.ib.stat_rate;
66 } 84 }
85 ah->av.ib.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
67 86
68 return &ah->ibah; 87 return &ah->ibah;
69} 88}
70 89
90static struct ib_ah *create_iboe_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr,
91 struct mlx4_ib_ah *ah)
92{
93 struct mlx4_ib_dev *ibdev = to_mdev(pd->device);
94 struct mlx4_dev *dev = ibdev->dev;
95 union ib_gid sgid;
96 u8 mac[6];
97 int err;
98 int is_mcast;
99 u16 vlan_tag;
100
101 err = mlx4_ib_resolve_grh(ibdev, ah_attr, mac, &is_mcast, ah_attr->port_num);
102 if (err)
103 return ERR_PTR(err);
104
105 memcpy(ah->av.eth.mac, mac, 6);
106 err = ib_get_cached_gid(pd->device, ah_attr->port_num, ah_attr->grh.sgid_index, &sgid);
107 if (err)
108 return ERR_PTR(err);
109 vlan_tag = rdma_get_vlan_id(&sgid);
110 if (vlan_tag < 0x1000)
111 vlan_tag |= (ah_attr->sl & 7) << 13;
112 ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
113 ah->av.eth.gid_index = ah_attr->grh.sgid_index;
114 ah->av.eth.vlan = cpu_to_be16(vlan_tag);
115 if (ah_attr->static_rate) {
116 ah->av.eth.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
117 while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
118 !(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support))
119 --ah->av.eth.stat_rate;
120 }
121
122 /*
123 * HW requires multicast LID so we just choose one.
124 */
125 if (is_mcast)
126 ah->av.ib.dlid = cpu_to_be16(0xc000);
127
128 memcpy(ah->av.eth.dgid, ah_attr->grh.dgid.raw, 16);
129 ah->av.eth.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
130
131 return &ah->ibah;
132}
133
134struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
135{
136 struct mlx4_ib_ah *ah;
137 struct ib_ah *ret;
138
139 ah = kzalloc(sizeof *ah, GFP_ATOMIC);
140 if (!ah)
141 return ERR_PTR(-ENOMEM);
142
143 if (rdma_port_get_link_layer(pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET) {
144 if (!(ah_attr->ah_flags & IB_AH_GRH)) {
145 ret = ERR_PTR(-EINVAL);
146 } else {
147 /*
148 * TBD: need to handle the case when we get
149 * called in an atomic context and there we
150 * might sleep. We don't expect this
151 * currently since we're working with link
152 * local addresses which we can translate
153 * without going to sleep.
154 */
155 ret = create_iboe_ah(pd, ah_attr, ah);
156 }
157
158 if (IS_ERR(ret))
159 kfree(ah);
160
161 return ret;
162 } else
163 return create_ib_ah(pd, ah_attr, ah); /* never fails */
164}
165
71int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) 166int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
72{ 167{
73 struct mlx4_ib_ah *ah = to_mah(ibah); 168 struct mlx4_ib_ah *ah = to_mah(ibah);
169 enum rdma_link_layer ll;
74 170
75 memset(ah_attr, 0, sizeof *ah_attr); 171 memset(ah_attr, 0, sizeof *ah_attr);
76 ah_attr->dlid = be16_to_cpu(ah->av.dlid); 172 ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
77 ah_attr->sl = be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28; 173 ah_attr->port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24;
78 ah_attr->port_num = be32_to_cpu(ah->av.port_pd) >> 24; 174 ll = rdma_port_get_link_layer(ibah->device, ah_attr->port_num);
79 if (ah->av.stat_rate) 175 ah_attr->dlid = ll == IB_LINK_LAYER_INFINIBAND ? be16_to_cpu(ah->av.ib.dlid) : 0;
80 ah_attr->static_rate = ah->av.stat_rate - MLX4_STAT_RATE_OFFSET; 176 if (ah->av.ib.stat_rate)
81 ah_attr->src_path_bits = ah->av.g_slid & 0x7F; 177 ah_attr->static_rate = ah->av.ib.stat_rate - MLX4_STAT_RATE_OFFSET;
178 ah_attr->src_path_bits = ah->av.ib.g_slid & 0x7F;
82 179
83 if (mlx4_ib_ah_grh_present(ah)) { 180 if (mlx4_ib_ah_grh_present(ah)) {
84 ah_attr->ah_flags = IB_AH_GRH; 181 ah_attr->ah_flags = IB_AH_GRH;
85 182
86 ah_attr->grh.traffic_class = 183 ah_attr->grh.traffic_class =
87 be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20; 184 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20;
88 ah_attr->grh.flow_label = 185 ah_attr->grh.flow_label =
89 be32_to_cpu(ah->av.sl_tclass_flowlabel) & 0xfffff; 186 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) & 0xfffff;
90 ah_attr->grh.hop_limit = ah->av.hop_limit; 187 ah_attr->grh.hop_limit = ah->av.ib.hop_limit;
91 ah_attr->grh.sgid_index = ah->av.gid_index; 188 ah_attr->grh.sgid_index = ah->av.ib.gid_index;
92 memcpy(ah_attr->grh.dgid.raw, ah->av.dgid, 16); 189 memcpy(ah_attr->grh.dgid.raw, ah->av.ib.dgid, 16);
93 } 190 }
94 191
95 return 0; 192 return 0;
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-06 03:59:53 -0500