From f109c240c419b73c4dccab820e3525ef8e922f51 Mon Sep 17 00:00:00 2001 From: "Mintz, Yuval" Date: Sun, 19 Mar 2017 13:08:16 +0200 Subject: [PATCH] qed: Uniform IOV queue validation PF needs to validate the status of VF queues before asking firmware to configure anything for them, but that validation is done in various different forms - sometimes inadequate. Add auxillary functions that can be used for testing of the queue state and convert the various flows to use those instead of current existing flows; Also, add missing validations where needed. Signed-off-by: Yuval Mintz Signed-off-by: David S. Miller --- drivers/net/ethernet/qlogic/qed/qed_sriov.c | 125 +++++++++++++++----- 1 file changed, 93 insertions(+), 32 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qed/qed_sriov.c b/drivers/net/ethernet/qlogic/qed/qed_sriov.c index 098330e58b35..7547a23b4a4d 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_sriov.c +++ b/drivers/net/ethernet/qlogic/qed/qed_sriov.c @@ -178,26 +178,59 @@ static struct qed_vf_info *qed_iov_get_vf_info(struct qed_hwfn *p_hwfn, return vf; } -static bool qed_iov_validate_rxq(struct qed_hwfn *p_hwfn, - struct qed_vf_info *p_vf, u16 rx_qid) +enum qed_iov_validate_q_mode { + QED_IOV_VALIDATE_Q_NA, + QED_IOV_VALIDATE_Q_ENABLE, + QED_IOV_VALIDATE_Q_DISABLE, +}; + +static bool qed_iov_validate_queue_mode(struct qed_hwfn *p_hwfn, + struct qed_vf_info *p_vf, + u16 qid, + enum qed_iov_validate_q_mode mode, + bool b_is_tx) { - if (rx_qid >= p_vf->num_rxqs) + if (mode == QED_IOV_VALIDATE_Q_NA) + return true; + + if ((b_is_tx && p_vf->vf_queues[qid].p_tx_cid) || + (!b_is_tx && p_vf->vf_queues[qid].p_rx_cid)) + return mode == QED_IOV_VALIDATE_Q_ENABLE; + + /* In case we haven't found any valid cid, then its disabled */ + return mode == QED_IOV_VALIDATE_Q_DISABLE; +} + +static bool qed_iov_validate_rxq(struct qed_hwfn *p_hwfn, + struct qed_vf_info *p_vf, + u16 rx_qid, + enum qed_iov_validate_q_mode mode) +{ + if (rx_qid >= p_vf->num_rxqs) { DP_VERBOSE(p_hwfn, QED_MSG_IOV, "VF[0x%02x] - can't touch Rx queue[%04x]; Only 0x%04x are allocated\n", p_vf->abs_vf_id, rx_qid, p_vf->num_rxqs); - return rx_qid < p_vf->num_rxqs; + return false; + } + + return qed_iov_validate_queue_mode(p_hwfn, p_vf, rx_qid, mode, false); } static bool qed_iov_validate_txq(struct qed_hwfn *p_hwfn, - struct qed_vf_info *p_vf, u16 tx_qid) + struct qed_vf_info *p_vf, + u16 tx_qid, + enum qed_iov_validate_q_mode mode) { - if (tx_qid >= p_vf->num_txqs) + if (tx_qid >= p_vf->num_txqs) { DP_VERBOSE(p_hwfn, QED_MSG_IOV, "VF[0x%02x] - can't touch Tx queue[%04x]; Only 0x%04x are allocated\n", p_vf->abs_vf_id, tx_qid, p_vf->num_txqs); - return tx_qid < p_vf->num_txqs; + return false; + } + + return qed_iov_validate_queue_mode(p_hwfn, p_vf, tx_qid, mode, true); } static bool qed_iov_validate_sb(struct qed_hwfn *p_hwfn, @@ -217,6 +250,34 @@ static bool qed_iov_validate_sb(struct qed_hwfn *p_hwfn, return false; } +static bool qed_iov_validate_active_rxq(struct qed_hwfn *p_hwfn, + struct qed_vf_info *p_vf) +{ + u8 i; + + for (i = 0; i < p_vf->num_rxqs; i++) + if (qed_iov_validate_queue_mode(p_hwfn, p_vf, i, + QED_IOV_VALIDATE_Q_ENABLE, + false)) + return true; + + return false; +} + +static bool qed_iov_validate_active_txq(struct qed_hwfn *p_hwfn, + struct qed_vf_info *p_vf) +{ + u8 i; + + for (i = 0; i < p_vf->num_txqs; i++) + if (qed_iov_validate_queue_mode(p_hwfn, p_vf, i, + QED_IOV_VALIDATE_Q_ENABLE, + true)) + return true; + + return false; +} + static int qed_iov_post_vf_bulletin(struct qed_hwfn *p_hwfn, int vfid, struct qed_ptt *p_ptt) { @@ -1826,6 +1887,16 @@ static void qed_iov_vf_mbx_stop_vport(struct qed_hwfn *p_hwfn, vf->vport_instance--; vf->spoof_chk = false; + if ((qed_iov_validate_active_rxq(p_hwfn, vf)) || + (qed_iov_validate_active_txq(p_hwfn, vf))) { + vf->b_malicious = true; + DP_NOTICE(p_hwfn, + "VF [%02x] - considered malicious; Unable to stop RX/TX queuess\n", + vf->abs_vf_id); + status = PFVF_STATUS_MALICIOUS; + goto out; + } + rc = qed_sp_vport_stop(p_hwfn, vf->opaque_fid, vf->vport_id); if (rc) { DP_ERR(p_hwfn, "qed_iov_vf_mbx_stop_vport returned error %d\n", @@ -1837,6 +1908,7 @@ static void qed_iov_vf_mbx_stop_vport(struct qed_hwfn *p_hwfn, vf->configured_features = 0; memset(&vf->shadow_config, 0, sizeof(vf->shadow_config)); +out: qed_iov_prepare_resp(p_hwfn, p_ptt, vf, CHANNEL_TLV_VPORT_TEARDOWN, sizeof(struct pfvf_def_resp_tlv), status); } @@ -1893,7 +1965,8 @@ static void qed_iov_vf_mbx_start_rxq(struct qed_hwfn *p_hwfn, req = &mbx->req_virt->start_rxq; - if (!qed_iov_validate_rxq(p_hwfn, vf, req->rx_qid) || + if (!qed_iov_validate_rxq(p_hwfn, vf, req->rx_qid, + QED_IOV_VALIDATE_Q_DISABLE) || !qed_iov_validate_sb(p_hwfn, vf, req->hw_sb)) goto out; @@ -2007,7 +2080,8 @@ static void qed_iov_vf_mbx_start_txq(struct qed_hwfn *p_hwfn, memset(¶ms, 0, sizeof(params)); req = &mbx->req_virt->start_txq; - if (!qed_iov_validate_txq(p_hwfn, vf, req->tx_qid) || + if (!qed_iov_validate_txq(p_hwfn, vf, req->tx_qid, + QED_IOV_VALIDATE_Q_DISABLE) || !qed_iov_validate_sb(p_hwfn, vf, req->hw_sb)) goto out; @@ -2164,22 +2238,17 @@ static void qed_iov_vf_mbx_update_rxqs(struct qed_hwfn *p_hwfn, complete_event_flg = !!(req->flags & VFPF_RXQ_UPD_COMPLETE_EVENT_FLAG); /* Validate inputs */ - if (req->num_rxqs + req->rx_qid > QED_MAX_VF_CHAINS_PER_PF || - !qed_iov_validate_rxq(p_hwfn, vf, req->rx_qid)) { - DP_INFO(p_hwfn, "VF[%d]: Incorrect Rxqs [%04x, %02x]\n", - vf->relative_vf_id, req->rx_qid, req->num_rxqs); - goto out; - } - - for (i = 0; i < req->num_rxqs; i++) { - qid = req->rx_qid + i; - if (!vf->vf_queues[qid].p_rx_cid) { - DP_INFO(p_hwfn, - "VF[%d] rx_qid = %d isn`t active!\n", - vf->relative_vf_id, qid); + for (i = req->rx_qid; i < req->rx_qid + req->num_rxqs; i++) + if (!qed_iov_validate_rxq(p_hwfn, vf, i, + QED_IOV_VALIDATE_Q_ENABLE)) { + DP_INFO(p_hwfn, "VF[%d]: Incorrect Rxqs [%04x, %02x]\n", + vf->relative_vf_id, req->rx_qid, req->num_rxqs); goto out; } + /* Prepare the handlers */ + for (i = 0; i < req->num_rxqs; i++) { + qid = req->rx_qid + i; handlers[i] = vf->vf_queues[qid].p_rx_cid; } @@ -2395,7 +2464,8 @@ qed_iov_vp_update_rss_param(struct qed_hwfn *p_hwfn, for (i = 0; i < table_size; i++) { q_idx = p_rss_tlv->rss_ind_table[i]; - if (!qed_iov_validate_rxq(p_hwfn, vf, q_idx)) { + if (!qed_iov_validate_rxq(p_hwfn, vf, q_idx, + QED_IOV_VALIDATE_Q_ENABLE)) { DP_VERBOSE(p_hwfn, QED_MSG_IOV, "VF[%d]: Omitting RSS due to wrong queue %04x\n", @@ -2404,15 +2474,6 @@ qed_iov_vp_update_rss_param(struct qed_hwfn *p_hwfn, goto out; } - if (!vf->vf_queues[q_idx].p_rx_cid) { - DP_VERBOSE(p_hwfn, - QED_MSG_IOV, - "VF[%d]: Omitting RSS due to inactive queue %08x\n", - vf->relative_vf_id, q_idx); - b_reject = true; - goto out; - } - p_rss->rss_ind_table[i] = vf->vf_queues[q_idx].p_rx_cid; }