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Code

IB/mlx4: Add support for setting RoCEv2 gids in hardware

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To tell hardware about a gid with type RoCEv2, software needs a new
modifier to the SET_PORT command: MLX4_SET_PORT_ROCE_ADDR. This can
replace the old method, MLX4_SET_PORT_GID_TABLE, for  RoCEv1 gids.

Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Moni Shoua 2016-01-14 17:50:35 +02:00 committed by Doug Ledford
parent 1da494cbc0
commit 7e57b85c44
2 changed files with 62 additions and 4 deletions
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59
drivers/infiniband/hw/mlx4/main.c
View File

@ -154,7 +154,7 @@ static struct net_device *mlx4_ib_get_netdev(struct ib_device *device, u8 port_n
return dev; return dev;
} }
static int mlx4_ib_update_gids(struct gid_entry *gids, static int mlx4_ib_update_gids_v1(struct gid_entry *gids,
struct mlx4_ib_dev *ibdev, struct mlx4_ib_dev *ibdev,
u8 port_num) u8 port_num)
{ {
@ -187,6 +187,63 @@ static int mlx4_ib_update_gids(struct gid_entry *gids,
return err; return err;
} }
static int mlx4_ib_update_gids_v1_v2(struct gid_entry *gids,
struct mlx4_ib_dev *ibdev,
u8 port_num)
{
struct mlx4_cmd_mailbox *mailbox;
int err;
struct mlx4_dev *dev = ibdev->dev;
int i;
struct {
union ib_gid gid;
__be32 rsrvd1[2];
__be16 rsrvd2;
u8 type;
u8 version;
__be32 rsrvd3;
} *gid_tbl;
mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(mailbox))
return -ENOMEM;
gid_tbl = mailbox->buf;
for (i = 0; i < MLX4_MAX_PORT_GIDS; ++i) {
memcpy(&gid_tbl[i].gid, &gids[i].gid, sizeof(union ib_gid));
if (gids[i].gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
gid_tbl[i].version = 2;
if (!ipv6_addr_v4mapped((struct in6_addr *)&gids[i].gid))
gid_tbl[i].type = 1;
else
memset(&gid_tbl[i].gid, 0, 12);
}
}
err = mlx4_cmd(dev, mailbox->dma,
MLX4_SET_PORT_ROCE_ADDR << 8 | port_num,
1, MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_WRAPPED);
if (mlx4_is_bonded(dev))
err += mlx4_cmd(dev, mailbox->dma,
MLX4_SET_PORT_ROCE_ADDR << 8 | 2,
1, MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_WRAPPED);
mlx4_free_cmd_mailbox(dev, mailbox);
return err;
}
static int mlx4_ib_update_gids(struct gid_entry *gids,
struct mlx4_ib_dev *ibdev,
u8 port_num)
{
if (ibdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2)
return mlx4_ib_update_gids_v1_v2(gids, ibdev, port_num);
return mlx4_ib_update_gids_v1(gids, ibdev, port_num);
}
static int mlx4_ib_add_gid(struct ib_device *device, static int mlx4_ib_add_gid(struct ib_device *device,
u8 port_num, u8 port_num,
unsigned int index, unsigned int index,

3
include/linux/mlx4/cmd.h
View File

@ -206,7 +206,8 @@ enum {
MLX4_SET_PORT_GID_TABLE = 0x5, MLX4_SET_PORT_GID_TABLE = 0x5,
MLX4_SET_PORT_PRIO2TC = 0x8, MLX4_SET_PORT_PRIO2TC = 0x8,
MLX4_SET_PORT_SCHEDULER = 0x9, MLX4_SET_PORT_SCHEDULER = 0x9,
MLX4_SET_PORT_VXLAN = 0xB MLX4_SET_PORT_VXLAN = 0xB,
MLX4_SET_PORT_ROCE_ADDR = 0xD
}; };
enum { enum {