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IB/mlx4: Add IPoIB checksum offload support

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ConnectX devices support checksum generation and verification of TCP
and UDP packets for UD IPoIB messages.  This patch checks if the HCA
supports this and sets the IB_DEVICE_UD_IP_CSUM capability flag if it
does.  It implements support for handling the IB_SEND_IP_CSUM send
flag and setting the csum_ok field in receive work completions.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Ali Ayub <ali@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Eli Cohen 2008-04-16 21:01:10 -07:00 committed by Roland Dreier
parent 6046136c74
commit 8ff095ec4b
6 changed files with 43 additions and 6 deletions
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16
drivers/infiniband/hw/mlx4/cq.c
View File

@ -297,6 +297,20 @@ static void mlx4_ib_handle_error_cqe(struct mlx4_err_cqe *cqe,
wc->vendor_err = cqe->vendor_err_syndrome;
}
static int mlx4_ib_ipoib_csum_ok(__be32 status, __be16 checksum)
{
return ((status & cpu_to_be32(MLX4_CQE_IPOIB_STATUS_IPV4 |
MLX4_CQE_IPOIB_STATUS_IPV4F |
MLX4_CQE_IPOIB_STATUS_IPV4OPT |
MLX4_CQE_IPOIB_STATUS_IPV6 |
MLX4_CQE_IPOIB_STATUS_IPOK)) ==
cpu_to_be32(MLX4_CQE_IPOIB_STATUS_IPV4 |
MLX4_CQE_IPOIB_STATUS_IPOK)) &&
(status & cpu_to_be32(MLX4_CQE_IPOIB_STATUS_UDP |
MLX4_CQE_IPOIB_STATUS_TCP)) &&
checksum == cpu_to_be16(0xffff);
}
static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
struct mlx4_ib_qp **cur_qp,
struct ib_wc *wc)
@ -434,6 +448,8 @@ static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
wc->dlid_path_bits = (g_mlpath_rqpn >> 24) & 0x7f;
wc->wc_flags |= g_mlpath_rqpn & 0x80000000 ? IB_WC_GRH : 0;
wc->pkey_index = be32_to_cpu(cqe->immed_rss_invalid) & 0x7f;
wc->csum_ok = mlx4_ib_ipoib_csum_ok(cqe->ipoib_status,
cqe->checksum);
}
return 0;

2
drivers/infiniband/hw/mlx4/main.c
View File

@ -99,6 +99,8 @@ static int mlx4_ib_query_device(struct ib_device *ibdev,
props->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UD_AV_PORT)
props->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_IPOIB_CSUM)
props->device_cap_flags |= IB_DEVICE_UD_IP_CSUM;
props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
0xffffff;

3
drivers/infiniband/hw/mlx4/qp.c
View File

@ -1436,6 +1436,9 @@ int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
(wr->send_flags & IB_SEND_SOLICITED ?
cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
((wr->send_flags & IB_SEND_IP_CSUM) ?
cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
qp->sq_signal_bits;
if (wr->opcode == IB_WR_SEND_WITH_IMM ||

4
drivers/net/mlx4/fw.c
View File

@ -696,6 +696,10 @@ int mlx4_INIT_HCA(struct mlx4_dev *dev, struct mlx4_init_hca_param *param)
/* Check port for UD address vector: */
*(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1);
/* Enable IPoIB checksumming if we can: */
if (dev->caps.flags & MLX4_DEV_CAP_FLAG_IPOIB_CSUM)
*(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1 << 3);
/* QPC/EEC/CQC/EQC/RDMARC attributes */
MLX4_PUT(inbox, param->qpc_base, INIT_HCA_QPC_BASE_OFFSET);

14
include/linux/mlx4/cq.h
View File

@ -45,11 +45,11 @@ struct mlx4_cqe {
u8 sl;
u8 reserved1;
__be16 rlid;
u32 reserved2;
__be32 ipoib_status;
__be32 byte_cnt;
__be16 wqe_index;
__be16 checksum;
u8 reserved3[3];
u8 reserved2[3];
u8 owner_sr_opcode;
};
@ -85,6 +85,16 @@ enum {
MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR = 0x22,
};
enum {
MLX4_CQE_IPOIB_STATUS_IPV4 = 1 << 22,
MLX4_CQE_IPOIB_STATUS_IPV4F = 1 << 23,
MLX4_CQE_IPOIB_STATUS_IPV6 = 1 << 24,
MLX4_CQE_IPOIB_STATUS_IPV4OPT = 1 << 25,
MLX4_CQE_IPOIB_STATUS_TCP = 1 << 26,
MLX4_CQE_IPOIB_STATUS_UDP = 1 << 27,
MLX4_CQE_IPOIB_STATUS_IPOK = 1 << 28,
};
static inline void mlx4_cq_arm(struct mlx4_cq *cq, u32 cmd,
void __iomem *uar_page,
spinlock_t *doorbell_lock)

10
include/linux/mlx4/qp.h
View File

@ -158,10 +158,12 @@ struct mlx4_qp_context {
#define MLX4_FW_VER_WQE_CTRL_NEC mlx4_fw_ver(2, 2, 232)
enum {
MLX4_WQE_CTRL_NEC = 1 << 29,
MLX4_WQE_CTRL_FENCE = 1 << 6,
MLX4_WQE_CTRL_CQ_UPDATE = 3 << 2,
MLX4_WQE_CTRL_SOLICITED = 1 << 1,
MLX4_WQE_CTRL_NEC = 1 << 29,
MLX4_WQE_CTRL_FENCE = 1 << 6,
MLX4_WQE_CTRL_CQ_UPDATE = 3 << 2,
MLX4_WQE_CTRL_SOLICITED = 1 << 1,
MLX4_WQE_CTRL_IP_CSUM = 1 << 4,
MLX4_WQE_CTRL_TCP_UDP_CSUM = 1 << 5,
};
struct mlx4_wqe_ctrl_seg {