[v7,2/6] net/iavf: add IAVF request queues function
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Commit Message
Add new virtchnl function to request additional queues from PF. Current
default queue pairs number when creating a VF is 16. In order to support
up to 256 queue pairs, enable this request queues function.
Since request queues command may return event message to report info,
disable interrupt before request queues to receive the adminq message.
Signed-off-by: Ting Xu <ting.xu@intel.com>
---
drivers/net/iavf/iavf.h | 1 +
drivers/net/iavf/iavf_vchnl.c | 88 ++++++++++++++++++++++++++++++++++-
2 files changed, 87 insertions(+), 2 deletions(-)
@@ -287,4 +287,5 @@ int iavf_add_del_rss_cfg(struct iavf_adapter *adapter,
int iavf_add_del_mc_addr_list(struct iavf_adapter *adapter,
struct rte_ether_addr *mc_addrs,
uint32_t mc_addrs_num, bool add);
+int iavf_request_queues(struct iavf_adapter *adapter, uint16_t num);
#endif /* _IAVF_ETHDEV_H_ */
@@ -17,6 +17,7 @@
#include <rte_eal.h>
#include <rte_ether.h>
#include <rte_ethdev_driver.h>
+#include <rte_ethdev_pci.h>
#include <rte_dev.h>
#include "iavf.h"
@@ -189,7 +190,33 @@ iavf_execute_vf_cmd(struct iavf_adapter *adapter, struct iavf_cmd_info *args)
}
_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.
+ */
+ do {
+ result = iavf_read_msg_from_pf(adapter, args->out_size,
+ args->out_buffer);
+ if (result == IAVF_MSG_SYS && vf->vf_reset) {
+ break;
+ } else if (result == IAVF_MSG_CMD ||
+ result == IAVF_MSG_ERR) {
+ err = -1;
+ break;
+ }
+ rte_delay_ms(ASQ_DELAY_MS);
+ /* If don't read msg or read sys event, continue */
+ } while (i++ < MAX_TRY_TIMES);
+ if (i >= MAX_TRY_TIMES ||
+ vf->cmd_retval != VIRTCHNL_STATUS_SUCCESS) {
+ err = -1;
+ PMD_DRV_LOG(ERR, "No response or return failure (%d)"
+ " for cmd %d", vf->cmd_retval, args->ops);
+ }
+ _clear_cmd(vf);
+ break;
default:
/* For other virtchnl ops in running time,
* wait for the cmd done flag.
@@ -429,7 +456,8 @@ iavf_get_vf_resource(struct iavf_adapter *adapter)
caps = IAVF_BASIC_OFFLOAD_CAPS | VIRTCHNL_VF_CAP_ADV_LINK_SPEED |
VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC |
VIRTCHNL_VF_OFFLOAD_FDIR_PF |
- VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF;
+ VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF |
+ VIRTCHNL_VF_OFFLOAD_REQ_QUEUES;
args.in_args = (uint8_t *)∩︀
args.in_args_size = sizeof(caps);
@@ -1186,3 +1214,59 @@ iavf_add_del_mc_addr_list(struct iavf_adapter *adapter,
return 0;
}
+
+int
+iavf_request_queues(struct iavf_adapter *adapter, uint16_t num)
+{
+ struct rte_eth_dev *dev = adapter->eth_dev;
+ struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(adapter);
+ struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(dev);
+ struct virtchnl_vf_res_request vfres;
+ struct iavf_cmd_info args;
+ uint16_t num_queue_pairs;
+ int err;
+
+ if (!(vf->vf_res->vf_cap_flags &
+ VIRTCHNL_VF_OFFLOAD_REQ_QUEUES)) {
+ PMD_DRV_LOG(ERR, "request queues not supported");
+ return -1;
+ }
+
+ if (num == 0) {
+ PMD_DRV_LOG(ERR, "queue number cannot be zero");
+ return -1;
+ }
+ 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 = IAVF_AQ_BUF_SZ;
+
+ /*
+ * disable interrupt to avoid the admin queue message to be read
+ * before iavf_read_msg_from_pf.
+ */
+ rte_intr_disable(&pci_dev->intr_handle);
+ err = iavf_execute_vf_cmd(adapter, &args);
+ rte_intr_enable(&pci_dev->intr_handle);
+ if (err) {
+ PMD_DRV_LOG(ERR, "fail to execute command OP_REQUEST_QUEUES");
+ return err;
+ }
+
+ /* request queues succeeded, vf is resetting */
+ if (vf->vf_reset) {
+ PMD_DRV_LOG(INFO, "vf is resetting");
+ return 0;
+ }
+
+ /* request additional queues failed, return available number */
+ num_queue_pairs =
+ ((struct virtchnl_vf_res_request *)args.out_buffer)->num_queue_pairs;
+ PMD_DRV_LOG(ERR, "request queues failed, only %u queues "
+ "available", num_queue_pairs);
+
+ return -1;
+}