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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>
This commit is contained in:
Yuval Mintz 2016-06-05 13:11:14 +03:00 committed by David S. Miller
parent 41086467d6
commit 5040acf537
2 changed files with 38 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/net/ethernet/qlogic/qed/qed_sriov.c
View File

@ -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,

20
drivers/net/ethernet/qlogic/qed/qed_vf.c
View File

@ -440,8 +440,8 @@ int qed_vf_pf_txq_start(struct qed_hwfn *p_hwfn,
u16 pbl_size, void __iomem **pp_doorbell)
{
struct qed_vf_iov *p_iov = p_hwfn->vf_iov_info;
struct pfvf_start_queue_resp_tlv *resp;
struct vfpf_start_txq_tlv *req;
struct pfvf_def_resp_tlv *resp;
int rc;
/* clear mailbox and prep first tlv */
@ -459,20 +459,24 @@ int qed_vf_pf_txq_start(struct qed_hwfn *p_hwfn,
qed_add_tlv(p_hwfn, &p_iov->offset,
CHANNEL_TLV_LIST_END, sizeof(struct channel_list_end_tlv));
resp = &p_iov->pf2vf_reply->default_resp;
resp = &p_iov->pf2vf_reply->queue_start;
rc = qed_send_msg2pf(p_hwfn, &resp->hdr.status, sizeof(*resp));
if (rc)
return rc;
goto exit;
if (resp->hdr.status != PFVF_STATUS_SUCCESS)
return -EINVAL;
if (resp->hdr.status != PFVF_STATUS_SUCCESS) {
rc = -EINVAL;
goto exit;
}
if (pp_doorbell) {
u8 cid = p_iov->acquire_resp.resc.cid[tx_queue_id];
*pp_doorbell = (u8 __iomem *)p_hwfn->doorbells + resp->offset;
*pp_doorbell = (u8 __iomem *)p_hwfn->doorbells +
qed_db_addr(cid, DQ_DEMS_LEGACY);
DP_VERBOSE(p_hwfn, QED_MSG_IOV,
"Txq[0x%02x]: doorbell at %p [offset 0x%08x]\n",
tx_queue_id, *pp_doorbell, resp->offset);
}
exit:
return rc;
}