diff options
author | Yuval Mintz <Yuval.Mintz@qlogic.com> | 2016-06-05 13:11:14 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-06-07 15:40:11 -0700 |
commit | 5040acf537ff716f1c8fe42a3814cd0c06ec44b9 (patch) | |
tree | 783d937f329129b57be1f019072a24cdcdbdb817 /drivers/net/ethernet/qlogic/qed/qed_sriov.c | |
parent | qed: Make PF more robust against malicious VF (diff) | |
download | linux-dev-5040acf537ff716f1c8fe42a3814cd0c06ec44b9.tar.xz linux-dev-5040acf537ff716f1c8fe42a3814cd0c06ec44b9.zip |
qed: Move doorbell calculation from VF to PF
Today, the VF is aware of its queues context-ids, and calculates the
doorbell address when opening its queues on its own.
The configuration of doorbells in HW can sometime in the future be changed
by the PF [hw has several configurable features that might affect doorbell
addresses, e.g., dpm support], this would break compatibility with older
VFs as their calculated doorbell addresses would be incorrect for such a
configuration.
In order to avoid such a backward compatibility failure, let the PF make
the calculation of the doorbell offset based on the context-id, and pass
that to the VF.
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/qlogic/qed/qed_sriov.c')
-rw-r--r-- | drivers/net/ethernet/qlogic/qed/qed_sriov.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/drivers/net/ethernet/qlogic/qed/qed_sriov.c b/drivers/net/ethernet/qlogic/qed/qed_sriov.c index dce81f5eefec..0ecd522fedd0 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_sriov.c +++ b/drivers/net/ethernet/qlogic/qed/qed_sriov.c @@ -1763,11 +1763,35 @@ out: qed_iov_vf_mbx_start_rxq_resp(p_hwfn, p_ptt, vf, status); } +static void qed_iov_vf_mbx_start_txq_resp(struct qed_hwfn *p_hwfn, + struct qed_ptt *p_ptt, + struct qed_vf_info *p_vf, u8 status) +{ + struct qed_iov_vf_mbx *mbx = &p_vf->vf_mbx; + struct pfvf_start_queue_resp_tlv *p_tlv; + + mbx->offset = (u8 *)mbx->reply_virt; + + p_tlv = qed_add_tlv(p_hwfn, &mbx->offset, CHANNEL_TLV_START_TXQ, + sizeof(*p_tlv)); + qed_add_tlv(p_hwfn, &mbx->offset, CHANNEL_TLV_LIST_END, + sizeof(struct channel_list_end_tlv)); + + /* Update the TLV with the response */ + if (status == PFVF_STATUS_SUCCESS) { + u16 qid = mbx->req_virt->start_txq.tx_qid; + + p_tlv->offset = qed_db_addr(p_vf->vf_queues[qid].fw_cid, + DQ_DEMS_LEGACY); + } + + qed_iov_send_response(p_hwfn, p_ptt, p_vf, sizeof(*p_tlv), status); +} + static void qed_iov_vf_mbx_start_txq(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, struct qed_vf_info *vf) { - u16 length = sizeof(struct pfvf_def_resp_tlv); struct qed_queue_start_common_params params; struct qed_iov_vf_mbx *mbx = &vf->vf_mbx; u8 status = PFVF_STATUS_NO_RESOURCE; @@ -1808,8 +1832,7 @@ static void qed_iov_vf_mbx_start_txq(struct qed_hwfn *p_hwfn, } out: - qed_iov_prepare_resp(p_hwfn, p_ptt, vf, CHANNEL_TLV_START_TXQ, - length, status); + qed_iov_vf_mbx_start_txq_resp(p_hwfn, p_ptt, vf, status); } static int qed_iov_vf_stop_rxqs(struct qed_hwfn *p_hwfn, |