From: Jacob Keller <jacob.e.kel...@intel.com>
Enable support for VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC, to enable the VF
driver the ability to determine what Rx descriptor formats are
available. This requires sending an additional message during
initialization and reset, the VIRTCHNL_OP_GET_SUPPORTED_RXDIDS. This
operation requests the supported Rx descriptor IDs available from the
PF.
This is treated the same way that VLAN V2 capabilities are handled. Add
a new set of extended capability flags, used to process send and receipt
of the VIRTCHNL_OP_GET_SUPPORTED_RXDIDS message.
This ensures we finish negotiating for the supported descriptor formats
prior to beginning configuration of receive queues.
This change stores the supported format bitmap into the iavf_adapter
structure. Additionally, if VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC is enabled
by the PF, we need to make sure that the Rx queue configuration
specifies the format.
Signed-off-by: Jacob Keller <jacob.e.kel...@intel.com>
Reviewed-by: Wojciech Drewek <wojciech.dre...@intel.com>
Co-developed-by: Mateusz Polchlopek <mateusz.polchlo...@intel.com>
Signed-off-by: Mateusz Polchlopek <mateusz.polchlo...@intel.com>
---
drivers/net/ethernet/intel/iavf/iavf.h | 20 ++-
drivers/net/ethernet/intel/iavf/iavf_main.c | 127 ++++++++++++++++--
drivers/net/ethernet/intel/iavf/iavf_txrx.h | 2 +
.../net/ethernet/intel/iavf/iavf_virtchnl.c | 59 ++++++++
4 files changed, 199 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/intel/iavf/iavf.h
b/drivers/net/ethernet/intel/iavf/iavf.h
index fb6f1b644d3b..bc0201f6453d 100644
--- a/drivers/net/ethernet/intel/iavf/iavf.h
+++ b/drivers/net/ethernet/intel/iavf/iavf.h
@@ -267,6 +267,7 @@ struct iavf_adapter {
/* Lock to protect accesses to MAC and VLAN lists */
spinlock_t mac_vlan_list_lock;
char misc_vector_name[IFNAMSIZ + 9];
+ u8 rxdid;
int num_active_queues;
int num_req_queues;
@@ -336,6 +337,14 @@ struct iavf_adapter {
#define IAVF_FLAG_AQ_DISABLE_CTAG_VLAN_INSERTION BIT_ULL(36)
#define IAVF_FLAG_AQ_ENABLE_STAG_VLAN_INSERTION BIT_ULL(37)
#define IAVF_FLAG_AQ_DISABLE_STAG_VLAN_INSERTION BIT_ULL(38)
+#define IAVF_FLAG_AQ_GET_SUPPORTED_RXDIDS BIT_ULL(39)
+
+ /* AQ messages that must be sent after IAVF_FLAG_AQ_GET_CONFIG, in
+ * order to negotiated extended capabilities.
+ */
+#define IAVF_FLAG_AQ_EXTENDED_CAPS \
+ (IAVF_FLAG_AQ_GET_OFFLOAD_VLAN_V2_CAPS | \
+ IAVF_FLAG_AQ_GET_SUPPORTED_RXDIDS)
/* flags for processing extended capability messages during
* __IAVF_INIT_EXTENDED_CAPS. Each capability exchange requires
@@ -347,10 +356,14 @@ struct iavf_adapter {
u64 extended_caps;
#define IAVF_EXTENDED_CAP_SEND_VLAN_V2 BIT_ULL(0)
#define IAVF_EXTENDED_CAP_RECV_VLAN_V2 BIT_ULL(1)
+#define IAVF_EXTENDED_CAP_SEND_RXDID BIT_ULL(2)
+#define IAVF_EXTENDED_CAP_RECV_RXDID BIT_ULL(3)
#define IAVF_EXTENDED_CAPS \
(IAVF_EXTENDED_CAP_SEND_VLAN_V2 | \
- IAVF_EXTENDED_CAP_RECV_VLAN_V2)
+ IAVF_EXTENDED_CAP_RECV_VLAN_V2 | \
+ IAVF_EXTENDED_CAP_SEND_RXDID | \
+ IAVF_EXTENDED_CAP_RECV_RXDID)
/* Lock to prevent possible clobbering of
* current_netdev_promisc_flags
@@ -408,12 +421,15 @@ struct iavf_adapter {
VIRTCHNL_VF_OFFLOAD_FDIR_PF)
#define ADV_RSS_SUPPORT(_a) ((_a)->vf_res->vf_cap_flags & \
VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF)
+#define RXDID_ALLOWED(_a) ((_a)->vf_res->vf_cap_flags & \
+ VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC)
struct virtchnl_vf_resource *vf_res; /* incl. all VSIs */
struct virtchnl_vsi_resource *vsi_res; /* our LAN VSI */
struct virtchnl_version_info pf_version;
#define PF_IS_V11(_a) (((_a)->pf_version.major == 1) && \
((_a)->pf_version.minor == 1))
struct virtchnl_vlan_caps vlan_v2_caps;
+ struct virtchnl_supported_rxdids supported_rxdids;
u16 msg_enable;
struct iavf_eth_stats current_stats;
struct iavf_vsi vsi;
@@ -551,6 +567,8 @@ int iavf_send_vf_config_msg(struct iavf_adapter *adapter);
int iavf_get_vf_config(struct iavf_adapter *adapter);
int iavf_get_vf_vlan_v2_caps(struct iavf_adapter *adapter);
int iavf_send_vf_offload_vlan_v2_msg(struct iavf_adapter *adapter);
+int iavf_send_vf_supported_rxdids_msg(struct iavf_adapter *adapter);
+int iavf_get_vf_supported_rxdids(struct iavf_adapter *adapter);
void iavf_set_queue_vlan_tag_loc(struct iavf_adapter *adapter);
u16 iavf_get_num_vlans_added(struct iavf_adapter *adapter);
void iavf_irq_enable(struct iavf_adapter *adapter, bool flush);
diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c
b/drivers/net/ethernet/intel/iavf/iavf_main.c
index f46865f2ab56..11f3280793e6 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -710,6 +710,38 @@ static void iavf_configure_tx(struct iavf_adapter *adapter)
adapter->tx_rings[i].tail = hw->hw_addr + IAVF_QTX_TAIL1(i);
}
+/**
+ * iavf_select_rx_desc_format - Select Rx descriptor format
+ * @adapter: adapter private structure
+ *
+ * Select what Rx descriptor format based on availability and enabled
+ * features.
+ *
+ * Return: the desired RXDID to select for a given Rx queue, as defined by
+ * enum virtchnl_rxdid_format.
+ */
+static u8 iavf_select_rx_desc_format(struct iavf_adapter *adapter)
+{
+ u64 supported_rxdids = adapter->supported_rxdids.supported_rxdids;
+
+ /* If we did not negotiate VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC, we must
+ * stick with the default value of the legacy 32 byte format.
+ */
+ if (!RXDID_ALLOWED(adapter))
+ return VIRTCHNL_RXDID_1_32B_BASE;
+
+ /* Warn if the PF does not list support for the default legacy
+ * descriptor format. This shouldn't happen, as this is the format
+ * used if VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC is not supported. It is
+ * likely caused by a bug in the PF implementation failing to indicate
+ * support for the format.
+ */
+ if (supported_rxdids & BIT(VIRTCHNL_RXDID_1_32B_BASE))
+ dev_warn(&adapter->pdev->dev, "PF does not list support for
default Rx descriptor format\n");
+
+ return VIRTCHNL_RXDID_1_32B_BASE;
+}
+
/**
* iavf_configure_rx - Configure Receive Unit after Reset
* @adapter: board private structure
@@ -720,8 +752,12 @@ static void iavf_configure_rx(struct iavf_adapter *adapter)
{
struct iavf_hw *hw = &adapter->hw;
- for (u32 i = 0; i < adapter->num_active_queues; i++)
+ adapter->rxdid = iavf_select_rx_desc_format(adapter);
+
+ for (u32 i = 0; i < adapter->num_active_queues; i++) {
adapter->rx_rings[i].tail = hw->hw_addr + IAVF_QRX_TAIL1(i);
+ adapter->rx_rings[i].rxdid = adapter->rxdid;
+ }
}
/**
@@ -2046,6 +2082,8 @@ static int iavf_process_aq_command(struct iavf_adapter
*adapter)
return iavf_send_vf_config_msg(adapter);
if (adapter->aq_required & IAVF_FLAG_AQ_GET_OFFLOAD_VLAN_V2_CAPS)
return iavf_send_vf_offload_vlan_v2_msg(adapter);
+ if (adapter->aq_required & IAVF_FLAG_AQ_GET_SUPPORTED_RXDIDS)
+ return iavf_send_vf_supported_rxdids_msg(adapter);
if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_QUEUES) {
iavf_disable_queues(adapter);
return 0;
@@ -2559,6 +2597,67 @@ static void iavf_init_recv_offload_vlan_v2_caps(struct
iavf_adapter *adapter)
iavf_change_state(adapter, __IAVF_INIT_FAILED);
}
+/**
+ * iavf_init_send_supported_rxdids - part of querying for supported RXDID
+ * formats
+ * @adapter: board private structure
+ *
+ * Function processes send of the request for supported RXDIDs to the PF.
+ * Must clear IAVF_EXTENDED_CAP_RECV_RXDID if the message is not sent, e.g.
+ * due to the PF not negotiating VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC.
+ */
+static void iavf_init_send_supported_rxdids(struct iavf_adapter *adapter)
+{
+ int ret;
+
+ WARN_ON(!(adapter->extended_caps & IAVF_EXTENDED_CAP_SEND_RXDID));
+
+ ret = iavf_send_vf_supported_rxdids_msg(adapter);
+ if (ret == -EOPNOTSUPP) {
+ /* PF does not support VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC. In this
+ * case, we did not send the capability exchange message and
+ * do not expect a response.
+ */
+ adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_RXDID;
+ }
+
+ /* We sent the message, so move on to the next step */
+ adapter->extended_caps &= ~IAVF_EXTENDED_CAP_SEND_RXDID;
+}
+
+/**
+ * iavf_init_recv_supported_rxdids - part of querying for supported RXDID
+ * formats
+ * @adapter: board private structure
+ *
+ * Function processes receipt of the supported RXDIDs message from the PF.
+ **/
+static void iavf_init_recv_supported_rxdids(struct iavf_adapter *adapter)
+{
+ int ret;
+
+ WARN_ON(!(adapter->extended_caps & IAVF_EXTENDED_CAP_RECV_RXDID));
+
+ memset(&adapter->supported_rxdids, 0,
+ sizeof(adapter->supported_rxdids));
+
+ ret = iavf_get_vf_supported_rxdids(adapter);
+ if (ret)
+ goto err;
+
+ /* We've processed the PF response to the
+ * VIRTCHNL_OP_GET_SUPPORTED_RXDIDS message we sent previously.
+ */
+ adapter->extended_caps &= ~IAVF_EXTENDED_CAP_RECV_RXDID;
+ return;
+err:
+ /* We didn't receive a reply. Make sure we try sending again when
+ * __IAVF_INIT_FAILED attempts to recover.
+ */
+ adapter->extended_caps |= IAVF_EXTENDED_CAP_SEND_RXDID;
+ iavf_change_state(adapter, __IAVF_INIT_FAILED);
+}
+
/**
* iavf_init_process_extended_caps - Part of driver startup
* @adapter: board private structure
@@ -2583,6 +2682,15 @@ static void iavf_init_process_extended_caps(struct
iavf_adapter *adapter)
return;
}
+ /* Process capability exchange for RXDID formats */
+ if (adapter->extended_caps & IAVF_EXTENDED_CAP_SEND_RXDID) {
+ iavf_init_send_supported_rxdids(adapter);
+ return;
+ } else if (adapter->extended_caps & IAVF_EXTENDED_CAP_RECV_RXDID) {
+ iavf_init_recv_supported_rxdids(adapter);
+ return;
+ }
+
/* When we reach here, no further extended capabilities exchanges are
* necessary, so we finally transition into __IAVF_INIT_CONFIG_ADAPTER
*/
@@ -3051,15 +3159,18 @@ static void iavf_reset_task(struct work_struct *work)
}
adapter->aq_required |= IAVF_FLAG_AQ_GET_CONFIG;
- /* always set since VIRTCHNL_OP_GET_VF_RESOURCES has not been
- * sent/received yet, so VLAN_V2_ALLOWED() cannot is not reliable here,
- * however the VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS won't be sent until
- * VIRTCHNL_OP_GET_VF_RESOURCES and VIRTCHNL_VF_OFFLOAD_VLAN_V2 have
- * been successfully sent and negotiated
- */
- adapter->aq_required |= IAVF_FLAG_AQ_GET_OFFLOAD_VLAN_V2_CAPS;
adapter->aq_required |= IAVF_FLAG_AQ_MAP_VECTORS;
+ /* Certain capabilities require an extended negotiation process using
+ * extra messages that must be processed after getting the VF
+ * configuration. The related checks such as VLAN_V2_ALLOWED() are not
+ * reliable here, since the configuration has not yet been negotiated.
+ *
+ * Always set these flags, since them related VIRTCHNL messages won't
+ * be sent until after VIRTCHNL_OP_GET_VF_RESOURCES.
+ */
+ adapter->aq_required |= IAVF_FLAG_AQ_EXTENDED_CAPS;
+
spin_lock_bh(&adapter->mac_vlan_list_lock);
/* Delete filter for the current MAC address, it could have
diff --git a/drivers/net/ethernet/intel/iavf/iavf_txrx.h
b/drivers/net/ethernet/intel/iavf/iavf_txrx.h
index d7b5587aeb8e..17309d8625ac 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_txrx.h
+++ b/drivers/net/ethernet/intel/iavf/iavf_txrx.h
@@ -262,6 +262,8 @@ struct iavf_ring {
u16 next_to_use;
u16 next_to_clean;
+ u8 rxdid; /* Rx descriptor format */
+
u16 flags;
#define IAVF_TXR_FLAGS_WB_ON_ITR BIT(0)
#define IAVF_TXR_FLAGS_ARM_WB BIT(1)
diff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
index 7e810b65380c..797e6ecbc30b 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
@@ -144,6 +144,7 @@ int iavf_send_vf_config_msg(struct iavf_adapter *adapter)
VIRTCHNL_VF_OFFLOAD_ENCAP |
VIRTCHNL_VF_OFFLOAD_TC_U32 |
VIRTCHNL_VF_OFFLOAD_VLAN_V2 |
+ VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC |
VIRTCHNL_VF_OFFLOAD_CRC |
VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM |
VIRTCHNL_VF_OFFLOAD_REQ_QUEUES |
@@ -176,6 +177,19 @@ int iavf_send_vf_offload_vlan_v2_msg(struct iavf_adapter
*adapter)
NULL, 0);
}
+int iavf_send_vf_supported_rxdids_msg(struct iavf_adapter *adapter)
+{
+ adapter->aq_required &= ~IAVF_FLAG_AQ_GET_SUPPORTED_RXDIDS;
+
+ if (!RXDID_ALLOWED(adapter))
+ return -EOPNOTSUPP;
+
+ adapter->current_op = VIRTCHNL_OP_GET_SUPPORTED_RXDIDS;
+
+ return iavf_send_pf_msg(adapter, VIRTCHNL_OP_GET_SUPPORTED_RXDIDS,
+ NULL, 0);
+}
+
/**
* iavf_validate_num_queues
* @adapter: adapter structure
@@ -262,6 +276,45 @@ int iavf_get_vf_vlan_v2_caps(struct iavf_adapter *adapter)
return err;
}
+int iavf_get_vf_supported_rxdids(struct iavf_adapter *adapter)
+{
+ struct iavf_hw *hw = &adapter->hw;
+ struct iavf_arq_event_info event;
+ enum virtchnl_ops op;
+ enum iavf_status err;
+ u16 len;
+
+ len = sizeof(struct virtchnl_supported_rxdids);
+ event.buf_len = len;
+ event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
+ if (!event.msg_buf) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ while (1) {
+ /* When the AQ is empty, iavf_clean_arq_element will return
+ * nonzero and this loop will terminate.
+ */
+ err = iavf_clean_arq_element(hw, &event, NULL);
+ if (err != IAVF_SUCCESS)
+ goto out_alloc;
+ op = (enum virtchnl_ops)le32_to_cpu(event.desc.cookie_high);
+ if (op == VIRTCHNL_OP_GET_SUPPORTED_RXDIDS)
+ break;
+ }
+
+ err = (enum iavf_status)le32_to_cpu(event.desc.cookie_low);
+ if (err)
+ goto out_alloc;
+
+ memcpy(&adapter->supported_rxdids, event.msg_buf, min(event.msg_len,
len));
+out_alloc:
+ kfree(event.msg_buf);
+out:
+ return err;
+}
+
/**
* iavf_configure_queues
* @adapter: adapter structure
@@ -308,6 +361,8 @@ void iavf_configure_queues(struct iavf_adapter *adapter)
vqpi->rxq.dma_ring_addr = adapter->rx_rings[i].dma;
vqpi->rxq.max_pkt_size = max_frame;
vqpi->rxq.databuffer_size = adapter->rx_rings[i].rx_buf_len;
+ if (RXDID_ALLOWED(adapter))
+ vqpi->rxq.rxdid = adapter->rxdid;
if (CRC_OFFLOAD_ALLOWED(adapter))
vqpi->rxq.crc_disable = !!(adapter->netdev->features &
NETIF_F_RXFCS);
@@ -2372,6 +2427,10 @@ void iavf_virtchnl_completion(struct iavf_adapter
*adapter,
aq_required;
}
break;
+ case VIRTCHNL_OP_GET_SUPPORTED_RXDIDS:
+ memcpy(&adapter->supported_rxdids, msg,
+ min_t(u16, msglen, sizeof(adapter->supported_rxdids)));
+ break;
case VIRTCHNL_OP_ENABLE_QUEUES:
/* enable transmits */
iavf_irq_enable(adapter, true);
--
2.38.1
