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/etherdevice.h> 34 #include <dev/mlx5/driver.h> 35 #include <dev/mlx5/mlx5_core/mlx5_core.h> 36 #include <dev/mlx5/mlx5_lib/mlx5.h> 37 38 void mlx5_init_reserved_gids(struct mlx5_core_dev *dev) 39 { 40 unsigned int tblsz = MLX5_CAP_ROCE(dev, roce_address_table_size); 41 42 ida_init(&dev->roce.reserved_gids.ida); 43 dev->roce.reserved_gids.start = tblsz; 44 dev->roce.reserved_gids.count = 0; 45 } 46 47 void mlx5_cleanup_reserved_gids(struct mlx5_core_dev *dev) 48 { 49 WARN_ON(!ida_is_empty(&dev->roce.reserved_gids.ida)); 50 dev->roce.reserved_gids.start = 0; 51 dev->roce.reserved_gids.count = 0; 52 ida_destroy(&dev->roce.reserved_gids.ida); 53 } 54 55 int mlx5_core_reserve_gids(struct mlx5_core_dev *dev, unsigned int count) 56 { 57 if (test_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state)) { 58 mlx5_core_err(dev, "Cannot reserve GIDs when interfaces are up\n"); 59 return -EPERM; 60 } 61 if (dev->roce.reserved_gids.start < count) { 62 mlx5_core_warn(dev, "GID table exhausted attempting to reserve %d more GIDs\n", 63 count); 64 return -ENOMEM; 65 } 66 if (dev->roce.reserved_gids.count + count > MLX5_MAX_RESERVED_GIDS) { 67 mlx5_core_warn(dev, "Unable to reserve %d more GIDs\n", count); 68 return -ENOMEM; 69 } 70 71 dev->roce.reserved_gids.start -= count; 72 dev->roce.reserved_gids.count += count; 73 mlx5_core_dbg(dev, "Reserved %u GIDs starting at %u\n", 74 dev->roce.reserved_gids.count, 75 dev->roce.reserved_gids.start); 76 return 0; 77 } 78 79 void mlx5_core_unreserve_gids(struct mlx5_core_dev *dev, unsigned int count) 80 { 81 WARN(test_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state), "Unreserving GIDs when interfaces are up"); 82 WARN(count > dev->roce.reserved_gids.count, "Unreserving %u GIDs when only %u reserved", 83 count, dev->roce.reserved_gids.count); 84 85 dev->roce.reserved_gids.start += count; 86 dev->roce.reserved_gids.count -= count; 87 mlx5_core_dbg(dev, "%u GIDs starting at %u left reserved\n", 88 dev->roce.reserved_gids.count, 89 dev->roce.reserved_gids.start); 90 } 91 92 int mlx5_core_reserved_gid_alloc(struct mlx5_core_dev *dev, int *gid_index) 93 { 94 int end = dev->roce.reserved_gids.start + 95 dev->roce.reserved_gids.count; 96 int index = 0; 97 98 index = ida_simple_get(&dev->roce.reserved_gids.ida, 99 dev->roce.reserved_gids.start, end, 100 GFP_KERNEL); 101 if (index < 0) 102 return index; 103 104 mlx5_core_dbg(dev, "Allocating reserved GID %u\n", index); 105 *gid_index = index; 106 return 0; 107 } 108 109 void mlx5_core_reserved_gid_free(struct mlx5_core_dev *dev, int gid_index) 110 { 111 mlx5_core_dbg(dev, "Freeing reserved GID %u\n", gid_index); 112 ida_simple_remove(&dev->roce.reserved_gids.ida, gid_index); 113 } 114 115 unsigned int mlx5_core_reserved_gids_count(struct mlx5_core_dev *dev) 116 { 117 return dev->roce.reserved_gids.count; 118 } 119 EXPORT_SYMBOL_GPL(mlx5_core_reserved_gids_count); 120 121 int mlx5_core_roce_gid_set(struct mlx5_core_dev *dev, unsigned int index, 122 u8 roce_version, u8 roce_l3_type, const u8 *gid, 123 const u8 *mac, bool vlan, u16 vlan_id) 124 { 125 #define MLX5_SET_RA(p, f, v) MLX5_SET(roce_addr_layout, p, f, v) 126 u32 in[MLX5_ST_SZ_DW(set_roce_address_in)] = {0}; 127 u32 out[MLX5_ST_SZ_DW(set_roce_address_out)] = {0}; 128 void *in_addr = MLX5_ADDR_OF(set_roce_address_in, in, roce_address); 129 char *addr_l3_addr = MLX5_ADDR_OF(roce_addr_layout, in_addr, 130 source_l3_address); 131 void *addr_mac = MLX5_ADDR_OF(roce_addr_layout, in_addr, 132 source_mac_47_32); 133 int gidsz = MLX5_FLD_SZ_BYTES(roce_addr_layout, source_l3_address); 134 135 if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH) 136 return -EINVAL; 137 138 if (gid) { 139 if (vlan) { 140 MLX5_SET_RA(in_addr, vlan_valid, 1); 141 MLX5_SET_RA(in_addr, vlan_id, vlan_id); 142 } 143 144 ether_addr_copy(addr_mac, mac); 145 MLX5_SET_RA(in_addr, roce_version, roce_version); 146 MLX5_SET_RA(in_addr, roce_l3_type, roce_l3_type); 147 memcpy(addr_l3_addr, gid, gidsz); 148 } 149 150 MLX5_SET(set_roce_address_in, in, roce_address_index, index); 151 MLX5_SET(set_roce_address_in, in, opcode, MLX5_CMD_OP_SET_ROCE_ADDRESS); 152 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); 153 } 154 EXPORT_SYMBOL(mlx5_core_roce_gid_set); 155