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Date: Fri, 17 Apr 2020 10:10:32 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net, gregkh@...uxfoundation.org
Cc: Dave Ertman <david.m.ertman@...el.com>, netdev@...r.kernel.org,
linux-rdma@...r.kernel.org, nhorman@...hat.com,
sassmann@...hat.com, jgg@...pe.ca,
ranjani.sridharan@...ux.intel.com,
pierre-louis.bossart@...ux.intel.com,
Tony Nguyen <anthony.l.nguyen@...el.com>,
Andrew Bowers <andrewx.bowers@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 7/9] ice: Pass through communications to VF
From: Dave Ertman <david.m.ertman@...el.com>
Allow for forwarding of RDMA and VF virt channel messages. The driver will
forward messages from the RDMA driver to the VF via the vc_send operation
and invoke the peer's vc_receive() call when receiving a virt channel
message destined for the peer driver.
Signed-off-by: Dave Ertman <david.m.ertman@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/ice/ice.h | 1 +
drivers/net/ethernet/intel/ice/ice_idc.c | 34 +++++++++++++++++++
.../net/ethernet/intel/ice/ice_virtchnl_pf.c | 34 +++++++++++++++++++
3 files changed, 69 insertions(+)
diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index 624190eaea47..107404eaac91 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -393,6 +393,7 @@ struct ice_pf {
u32 msg_enable;
u32 num_rdma_msix; /* Total MSIX vectors for RDMA driver */
u32 rdma_base_vector;
+ struct iidc_peer_dev *rdma_peer;
u32 hw_csum_rx_error;
u32 oicr_idx; /* Other interrupt cause MSIX vector index */
u32 num_avail_sw_msix; /* remaining MSIX SW vectors left unclaimed */
diff --git a/drivers/net/ethernet/intel/ice/ice_idc.c b/drivers/net/ethernet/intel/ice/ice_idc.c
index 5e1877772245..c8b6f0ea45fb 100644
--- a/drivers/net/ethernet/intel/ice/ice_idc.c
+++ b/drivers/net/ethernet/intel/ice/ice_idc.c
@@ -1070,6 +1070,38 @@ ice_peer_update_vsi_filter(struct iidc_peer_dev *peer_dev,
return ret;
}
+/**
+ * ice_peer_vc_send - send a virt channel message from RDMA peer
+ * @peer_dev: pointer to RDMA peer dev
+ * @vf_id: the absolute VF ID of recipient of message
+ * @msg: pointer to message contents
+ * @len: len of message
+ */
+static int
+ice_peer_vc_send(struct iidc_peer_dev *peer_dev, u32 vf_id, u8 *msg, u16 len)
+{
+ struct ice_pf *pf;
+ int err;
+
+ if (!ice_validate_peer_dev(peer_dev))
+ return -EINVAL;
+ if (!msg || !len)
+ return -ENOMEM;
+
+ pf = pci_get_drvdata(peer_dev->pdev);
+ if (vf_id >= pf->num_alloc_vfs || len > ICE_AQ_MAX_BUF_LEN)
+ return -EINVAL;
+
+ /* VIRTCHNL_OP_IWARP is being used for RoCEv2 msg also */
+ err = ice_aq_send_msg_to_vf(&pf->hw, vf_id, VIRTCHNL_OP_IWARP, 0, msg,
+ len, NULL);
+ if (err)
+ dev_err(ice_pf_to_dev(pf), "Unable to send RDMA msg to VF, error %d\n",
+ err);
+
+ return err;
+}
+
/* Initialize the ice_ops struct, which is used in 'ice_init_peer_devices' */
static const struct iidc_ops ops = {
.alloc_res = ice_peer_alloc_res,
@@ -1082,6 +1114,7 @@ static const struct iidc_ops ops = {
.peer_register = ice_peer_register,
.peer_unregister = ice_peer_unregister,
.update_vsi_filter = ice_peer_update_vsi_filter,
+ .vc_send = ice_peer_vc_send,
};
/**
@@ -1263,6 +1296,7 @@ int ice_init_peer_devices(struct ice_pf *pf)
switch (ice_peers[i].id) {
case IIDC_PEER_RDMA_ID:
if (test_bit(ICE_FLAG_IWARP_ENA, pf->flags)) {
+ pf->rdma_peer = peer_dev;
peer_dev->msix_count = pf->num_rdma_msix;
entry = &pf->msix_entries[pf->rdma_base_vector];
}
diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
index 07f3d4b456c7..95e39fef0a26 100644
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
@@ -3170,6 +3170,37 @@ static int ice_vc_dis_vlan_stripping(struct ice_vf *vf)
v_ret, NULL, 0);
}
+/**
+ * ice_vc_rdma_msg - send msg to RDMA PF from VF
+ * @vf: pointer to VF info
+ * @msg: pointer to msg buffer
+ * @len: length of the message
+ *
+ * This function is called indirectly from the AQ clean function.
+ */
+static int ice_vc_rdma_msg(struct ice_vf *vf, u8 *msg, u16 len)
+{
+ struct iidc_peer_dev *rdma_peer;
+ int ret;
+
+ rdma_peer = vf->pf->rdma_peer;
+ if (!rdma_peer) {
+ pr_err("Invalid RDMA peer attempted to send message to peer\n");
+ return -EIO;
+ }
+
+ if (!rdma_peer->peer_ops || !rdma_peer->peer_ops->vc_receive) {
+ pr_err("Incomplete RMDA peer attempting to send msg\n");
+ return -EINVAL;
+ }
+
+ ret = rdma_peer->peer_ops->vc_receive(rdma_peer, vf->vf_id, msg, len);
+ if (ret)
+ pr_err("Failed to send message to RDMA peer, error %d\n", ret);
+
+ return ret;
+}
+
/**
* ice_vf_init_vlan_stripping - enable/disable VLAN stripping on initialization
* @vf: VF to enable/disable VLAN stripping for on initialization
@@ -3304,6 +3335,9 @@ void ice_vc_process_vf_msg(struct ice_pf *pf, struct ice_rq_event_info *event)
case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
err = ice_vc_dis_vlan_stripping(vf);
break;
+ case VIRTCHNL_OP_IWARP:
+ err = ice_vc_rdma_msg(vf, msg, msglen);
+ break;
case VIRTCHNL_OP_UNKNOWN:
default:
dev_err(dev, "Unsupported opcode %d from VF %d\n", v_opcode,
--
2.25.2
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