1 /*
2 * Copyright (c) 2017, Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33 #include <linux/mlx5/driver.h>
34 #include <linux/etherdevice.h>
35 #include <linux/idr.h>
36 #include "mlx5_core.h"
37 #include "lib/mlx5.h"
38
mlx5_init_reserved_gids(struct mlx5_core_dev * dev)39 void mlx5_init_reserved_gids(struct mlx5_core_dev *dev)
40 {
41 unsigned int tblsz = MLX5_CAP_ROCE(dev, roce_address_table_size);
42
43 ida_init(&dev->roce.reserved_gids.ida);
44 dev->roce.reserved_gids.start = tblsz;
45 dev->roce.reserved_gids.count = 0;
46 }
47
mlx5_cleanup_reserved_gids(struct mlx5_core_dev * dev)48 void mlx5_cleanup_reserved_gids(struct mlx5_core_dev *dev)
49 {
50 WARN_ON(!ida_is_empty(&dev->roce.reserved_gids.ida));
51 dev->roce.reserved_gids.start = 0;
52 dev->roce.reserved_gids.count = 0;
53 ida_destroy(&dev->roce.reserved_gids.ida);
54 }
55
mlx5_core_reserve_gids(struct mlx5_core_dev * dev,unsigned int count)56 int mlx5_core_reserve_gids(struct mlx5_core_dev *dev, unsigned int count)
57 {
58 if (test_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state)) {
59 mlx5_core_err(dev, "Cannot reserve GIDs when interfaces are up\n");
60 return -EPERM;
61 }
62 if (dev->roce.reserved_gids.start < count) {
63 mlx5_core_warn(dev, "GID table exhausted attempting to reserve %d more GIDs\n",
64 count);
65 return -ENOMEM;
66 }
67 if (dev->roce.reserved_gids.count + count > MLX5_MAX_RESERVED_GIDS) {
68 mlx5_core_warn(dev, "Unable to reserve %d more GIDs\n", count);
69 return -ENOMEM;
70 }
71
72 dev->roce.reserved_gids.start -= count;
73 dev->roce.reserved_gids.count += count;
74 mlx5_core_dbg(dev, "Reserved %u GIDs starting at %u\n",
75 dev->roce.reserved_gids.count,
76 dev->roce.reserved_gids.start);
77 return 0;
78 }
79
mlx5_core_unreserve_gids(struct mlx5_core_dev * dev,unsigned int count)80 void mlx5_core_unreserve_gids(struct mlx5_core_dev *dev, unsigned int count)
81 {
82 WARN(test_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state), "Unreserving GIDs when interfaces are up");
83 WARN(count > dev->roce.reserved_gids.count, "Unreserving %u GIDs when only %u reserved",
84 count, dev->roce.reserved_gids.count);
85
86 dev->roce.reserved_gids.start += count;
87 dev->roce.reserved_gids.count -= count;
88 mlx5_core_dbg(dev, "%u GIDs starting at %u left reserved\n",
89 dev->roce.reserved_gids.count,
90 dev->roce.reserved_gids.start);
91 }
92
mlx5_core_reserved_gid_alloc(struct mlx5_core_dev * dev,int * gid_index)93 int mlx5_core_reserved_gid_alloc(struct mlx5_core_dev *dev, int *gid_index)
94 {
95 int end = dev->roce.reserved_gids.start +
96 dev->roce.reserved_gids.count;
97 int index = 0;
98
99 index = ida_simple_get(&dev->roce.reserved_gids.ida,
100 dev->roce.reserved_gids.start, end,
101 GFP_KERNEL);
102 if (index < 0)
103 return index;
104
105 mlx5_core_dbg(dev, "Allocating reserved GID %u\n", index);
106 *gid_index = index;
107 return 0;
108 }
109
mlx5_core_reserved_gid_free(struct mlx5_core_dev * dev,int gid_index)110 void mlx5_core_reserved_gid_free(struct mlx5_core_dev *dev, int gid_index)
111 {
112 mlx5_core_dbg(dev, "Freeing reserved GID %u\n", gid_index);
113 ida_simple_remove(&dev->roce.reserved_gids.ida, gid_index);
114 }
115
mlx5_core_reserved_gids_count(struct mlx5_core_dev * dev)116 unsigned int mlx5_core_reserved_gids_count(struct mlx5_core_dev *dev)
117 {
118 return dev->roce.reserved_gids.count;
119 }
120 EXPORT_SYMBOL_GPL(mlx5_core_reserved_gids_count);
121
mlx5_core_roce_gid_set(struct mlx5_core_dev * dev,unsigned int index,u8 roce_version,u8 roce_l3_type,const u8 * gid,const u8 * mac,bool vlan,u16 vlan_id,u8 port_num)122 int mlx5_core_roce_gid_set(struct mlx5_core_dev *dev, unsigned int index,
123 u8 roce_version, u8 roce_l3_type, const u8 *gid,
124 const u8 *mac, bool vlan, u16 vlan_id, u8 port_num)
125 {
126 #define MLX5_SET_RA(p, f, v) MLX5_SET(roce_addr_layout, p, f, v)
127 u32 in[MLX5_ST_SZ_DW(set_roce_address_in)] = {0};
128 u32 out[MLX5_ST_SZ_DW(set_roce_address_out)] = {0};
129 void *in_addr = MLX5_ADDR_OF(set_roce_address_in, in, roce_address);
130 char *addr_l3_addr = MLX5_ADDR_OF(roce_addr_layout, in_addr,
131 source_l3_address);
132 void *addr_mac = MLX5_ADDR_OF(roce_addr_layout, in_addr,
133 source_mac_47_32);
134 int gidsz = MLX5_FLD_SZ_BYTES(roce_addr_layout, source_l3_address);
135
136 if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
137 return -EINVAL;
138
139 if (gid) {
140 if (vlan) {
141 MLX5_SET_RA(in_addr, vlan_valid, 1);
142 MLX5_SET_RA(in_addr, vlan_id, vlan_id);
143 }
144
145 ether_addr_copy(addr_mac, mac);
146 MLX5_SET_RA(in_addr, roce_version, roce_version);
147 MLX5_SET_RA(in_addr, roce_l3_type, roce_l3_type);
148 memcpy(addr_l3_addr, gid, gidsz);
149 }
150
151 if (MLX5_CAP_GEN(dev, num_vhca_ports) > 0)
152 MLX5_SET(set_roce_address_in, in, vhca_port_num, port_num);
153
154 MLX5_SET(set_roce_address_in, in, roce_address_index, index);
155 MLX5_SET(set_roce_address_in, in, opcode, MLX5_CMD_OP_SET_ROCE_ADDRESS);
156 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
157 }
158 EXPORT_SYMBOL(mlx5_core_roce_gid_set);
159
