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net/i40e: support VF request more queues

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Before this patch, VF gets a default number of queues from the PF.
This patch enables VF to request a different number. When VF configures
more queues, it will send VIRTCHNL_OP_REQUEST_QUEUES to PF to request
more queues, if success, PF will reset the VF.

User can run "port stop all", "port config port_id rxq/txq queue_num"
and "port start all" to reconfigure queue number.

Signed-off-by: Zhirun Yan <zhirun.yan@intel.com>
Signed-off-by: Haiyue Wang <haiyue.wang@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
This commit is contained in:
Zhirun Yan 2018-12-20 11:01:28 +00:00 committed by Ferruh Yigit
parent 3fcde631cb
commit c48eb308ed
1 changed files with 63 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
drivers/net/i40e/i40e_ethdev_vf.c
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@ -359,6 +359,28 @@ i40evf_execute_vf_cmd(struct rte_eth_dev *dev, struct vf_cmd_info *args)
} while (i++ < MAX_TRY_TIMES);
_clear_cmd(vf);
break;
case VIRTCHNL_OP_REQUEST_QUEUES:
/**
* ignore async reply, only wait for system message,
* vf_reset = true if get VIRTCHNL_EVENT_RESET_IMPENDING,
* if not, means request queues failed.
*/
err = -1;
do {
ret = i40evf_read_pfmsg(dev, &info);
vf->cmd_retval = info.result;
if (ret == I40EVF_MSG_SYS && vf->vf_reset) {
err = 0;
break;
} else if (ret == I40EVF_MSG_ERR ||
ret == I40EVF_MSG_CMD) {
break;
}
rte_delay_ms(ASQ_DELAY_MS);
/* If don't read msg or read sys event, continue */
} while (i++ < MAX_TRY_TIMES);
_clear_cmd(vf);
break;
default:
/* for other adminq in running time, waiting the cmd done flag */
@ -1012,6 +1034,28 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
return err;
}
static int
i40evf_request_queues(struct rte_eth_dev *dev, uint16_t num)
{
struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
struct virtchnl_vf_res_request vfres;
struct vf_cmd_info args;
int err;
vfres.num_queue_pairs = num;
args.ops = VIRTCHNL_OP_REQUEST_QUEUES;
args.in_args = (u8 *)&vfres;
args.in_args_size = sizeof(vfres);
args.out_buffer = vf->aq_resp;
args.out_size = I40E_AQ_BUF_SZ;
err = i40evf_execute_vf_cmd(dev, &args);
if (err)
PMD_DRV_LOG(ERR, "fail to execute command OP_REQUEST_QUEUES");
return err;
}
static int
i40evf_del_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
{
@ -1522,8 +1566,11 @@ RTE_PMD_REGISTER_KMOD_DEP(net_i40e_vf, "* igb_uio | vfio-pci");
static int
i40evf_dev_configure(struct rte_eth_dev *dev)
{
struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
struct i40e_adapter *ad =
I40E_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
uint16_t num_queue_pairs = RTE_MAX(dev->data->nb_rx_queues,
dev->data->nb_tx_queues);
/* Initialize to TRUE. If any of Rx queues doesn't meet the bulk
* allocation or vector Rx preconditions we will reset it.
@ -1533,6 +1580,20 @@ i40evf_dev_configure(struct rte_eth_dev *dev)
ad->tx_simple_allowed = true;
ad->tx_vec_allowed = true;
if (num_queue_pairs > vf->vsi_res->num_queue_pairs) {
int ret = 0;
PMD_DRV_LOG(INFO, "change queue pairs from %u to %u",
vf->vsi_res->num_queue_pairs, num_queue_pairs);
ret = i40evf_request_queues(dev, num_queue_pairs);
if (ret != 0)
return ret;
ret = i40evf_dev_reset(dev);
if (ret != 0)
return ret;
}
return i40evf_init_vlan(dev);
}
@ -2151,8 +2212,8 @@ i40evf_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
{
struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
dev_info->max_rx_queues = vf->vsi_res->num_queue_pairs;
dev_info->max_tx_queues = vf->vsi_res->num_queue_pairs;
dev_info->max_rx_queues = I40E_MAX_QP_NUM_PER_VF;
dev_info->max_tx_queues = I40E_MAX_QP_NUM_PER_VF;
dev_info->min_rx_bufsize = I40E_BUF_SIZE_MIN;
dev_info->max_rx_pktlen = I40E_FRAME_SIZE_MAX;
dev_info->hash_key_size = (I40E_VFQF_HKEY_MAX_INDEX + 1) * sizeof(uint32_t);