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Message-Id: <20240813125513.8212-5-mateusz.polchlopek@intel.com>
Date: Tue, 13 Aug 2024 08:55:03 -0400
From: Mateusz Polchlopek <mateusz.polchlopek@...el.com>
To: intel-wired-lan@...ts.osuosl.org,
aleksander.lobakin@...el.com
Cc: netdev@...r.kernel.org,
Jacob Keller <jacob.e.keller@...el.com>,
Wojciech Drewek <wojciech.drewek@...el.com>,
Simon Horman <horms@...nel.org>,
Mateusz Polchlopek <mateusz.polchlopek@...el.com>
Subject: [Intel-wired-lan] [PATCH iwl-next v9 04/14] iavf: add support for negotiating flexible RXDID format
From: Jacob Keller <jacob.e.keller@...el.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.keller@...el.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@...el.com>
Reviewed-by: Simon Horman <horms@...nel.org>
Co-developed-by: Mateusz Polchlopek <mateusz.polchlopek@...el.com>
Signed-off-by: Mateusz Polchlopek <mateusz.polchlopek@...el.com>
---
drivers/net/ethernet/intel/iavf/iavf.h | 20 ++-
drivers/net/ethernet/intel/iavf/iavf_main.c | 123 ++++++++++++++++--
drivers/net/ethernet/intel/iavf/iavf_txrx.h | 2 +
.../net/ethernet/intel/iavf/iavf_virtchnl.c | 51 ++++++++
drivers/net/ethernet/intel/ice/ice_virtchnl.c | 23 +---
include/linux/avf/virtchnl.h | 5 -
6 files changed, 194 insertions(+), 30 deletions(-)
diff --git a/drivers/net/ethernet/intel/iavf/iavf.h b/drivers/net/ethernet/intel/iavf/iavf.h
index 48cd1d06761c..f1506b3d01ce 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 IAVF_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;
+ u64 supp_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 e635a6af5ec2..b728fb1f76d0 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -709,6 +709,38 @@ 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(const struct iavf_adapter *adapter)
+{
+ u64 rxdids = adapter->supp_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 (!IAVF_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 (!(rxdids & VIRTCHNL_RXDID_1_32B_BASE_M))
+ 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
@@ -719,8 +751,12 @@ 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;
+ }
}
/**
@@ -2045,6 +2081,8 @@ 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;
@@ -2558,6 +2596,63 @@ 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;
+
+ 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;
+
+ memset(&adapter->supp_rxdids, 0, sizeof(adapter->supp_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
@@ -2582,6 +2677,15 @@ 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
*/
@@ -3050,15 +3154,18 @@ 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..e8421994235b 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;
+ u16 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..bbd0eb06acd3 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 (!IAVF_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 +276,37 @@ 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;
+ u32 len = sizeof(u64);
+ enum virtchnl_ops op;
+ enum iavf_status err;
+ u8 rxdids;
+
+ event.msg_buf = &rxdids;
+ event.buf_len = len;
+
+ 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)
+ return err;
+ op = le32_to_cpu(event.desc.cookie_high);
+ if (op == VIRTCHNL_OP_GET_SUPPORTED_RXDIDS)
+ break;
+ }
+
+ err = le32_to_cpu(event.desc.cookie_low);
+ if (!err)
+ adapter->supp_rxdids = rxdids;
+
+ return 0;
+}
+
/**
* iavf_configure_queues
* @adapter: adapter structure
@@ -308,6 +353,8 @@ 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 (IAVF_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 +2419,10 @@ void iavf_virtchnl_completion(struct iavf_adapter *adapter,
aq_required;
}
break;
+ case VIRTCHNL_OP_GET_SUPPORTED_RXDIDS:
+ memcpy(&adapter->supp_rxdids, msg,
+ min_t(u16, msglen, sizeof(adapter->supp_rxdids)));
+ break;
case VIRTCHNL_OP_ENABLE_QUEUES:
/* enable transmits */
iavf_irq_enable(adapter, true);
diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl.c b/drivers/net/ethernet/intel/ice/ice_virtchnl.c
index 60f73f58e401..6d4b7686e2fa 100644
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl.c
@@ -2709,12 +2709,12 @@ static int ice_vc_set_rss_hena(struct ice_vf *vf, u8 *msg)
static int ice_vc_query_rxdid(struct ice_vf *vf)
{
enum virtchnl_status_code v_ret = VIRTCHNL_STATUS_SUCCESS;
- struct virtchnl_supported_rxdids *rxdid = NULL;
struct ice_hw *hw = &vf->pf->hw;
struct ice_pf *pf = vf->pf;
- int len = 0;
- int ret, i;
+ u32 len = sizeof(u64);
u32 regval;
+ u64 rxdid;
+ int ret, i;
if (!test_bit(ICE_VF_STATE_ACTIVE, vf->vf_states)) {
v_ret = VIRTCHNL_STATUS_ERR_PARAM;
@@ -2726,34 +2726,25 @@ static int ice_vc_query_rxdid(struct ice_vf *vf)
goto err;
}
- len = sizeof(struct virtchnl_supported_rxdids);
- rxdid = kzalloc(len, GFP_KERNEL);
- if (!rxdid) {
- v_ret = VIRTCHNL_STATUS_ERR_NO_MEMORY;
- len = 0;
- goto err;
- }
-
/* RXDIDs supported by DDP package can be read from the register
* to get the supported RXDID bitmap. But the legacy 32byte RXDID
* is not listed in DDP package, add it in the bitmap manually.
* Legacy 16byte descriptor is not supported.
*/
- rxdid->supported_rxdids |= BIT(ICE_RXDID_LEGACY_1);
+ rxdid |= BIT(ICE_RXDID_LEGACY_1);
for (i = ICE_RXDID_FLEX_NIC; i < ICE_FLEX_DESC_RXDID_MAX_NUM; i++) {
regval = rd32(hw, GLFLXP_RXDID_FLAGS(i, 0));
if ((regval >> GLFLXP_RXDID_FLAGS_FLEXIFLAG_4N_S)
& GLFLXP_RXDID_FLAGS_FLEXIFLAG_4N_M)
- rxdid->supported_rxdids |= BIT(i);
+ rxdid |= BIT(i);
}
- pf->supported_rxdids = rxdid->supported_rxdids;
+ pf->supported_rxdids = rxdid;
err:
ret = ice_vc_send_msg_to_vf(vf, VIRTCHNL_OP_GET_SUPPORTED_RXDIDS,
- v_ret, (u8 *)rxdid, len);
- kfree(rxdid);
+ v_ret, (u8 *)&rxdid, len);
return ret;
}
diff --git a/include/linux/avf/virtchnl.h b/include/linux/avf/virtchnl.h
index 6eb486221122..9aa7b92beedf 100644
--- a/include/linux/avf/virtchnl.h
+++ b/include/linux/avf/virtchnl.h
@@ -1087,11 +1087,6 @@ struct virtchnl_filter {
VIRTCHNL_CHECK_STRUCT_LEN(272, virtchnl_filter);
-struct virtchnl_supported_rxdids {
- /* see enum virtchnl_rx_desc_id_bitmasks */
- u64 supported_rxdids;
-};
-
/* VIRTCHNL_OP_EVENT
* PF sends this message to inform the VF driver of events that may affect it.
* No direct response is expected from the VF, though it may generate other
--
2.38.1
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