Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue

Tony Nguyen says:

====================
ice: cleanups and preparation for live migration

Jake Keller says:

Various cleanups and preparation to the ice driver code for supporting
SR-IOV live migration.

The logic for unpacking Rx queue context data is added. This is the inverse
of the existing packing logic. Thanks to <linux/packing.h> this is trivial
to add.

Code to enable both reading and writing the Tx queue context for a queue
over a shared hardware register interface is added. Thanks to ice_adapter,
this is locked across all PFs that need to use it, preventing concurrency
issues with multiple PFs.

The RSS hash configuration requested by a VF is cached within the VF
structure. This will be used to track and restore the same configuration
during migration load.

ice_sriov_set_msix_vec_count() is updated to use pci_iov_vf_id() instead of
open-coding a worse equivalent, and checks to avoid rebuilding MSI-X if the
current request is for the existing amount of vectors.

A new ice_get_vf_by_dev() helper function is added to simplify accessing a
VF from its PCI device structure. This will be used more heavily within the
live migration code itself.

* '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue:
  ice: introduce ice_get_vf_by_dev() wrapper
  ice: avoid rebuilding if MSI-X vector count is unchanged
  ice: use pci_iov_vf_id() to get VF ID
  ice: expose VF functions used by live migration
  ice: move ice_vsi_update_l2tsel to ice_lib.c
  ice: save RSS hash configuration for migration
  ice: add functions to get and set Tx queue context
  ice: add support for reading and unpacking Rx queue context
====================

Link: https://patch.msgid.link/20250710214518.1824208-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 10 insertions, 49 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl.c b/drivers/net/ethernet/intel/ice/ice_virtchnl.c
index 24426dcd8aa2..9460b6561b69 100644
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl.c
@@ -1427,7 +1427,7 @@ static bool ice_vc_validate_vqs_bitmaps(struct virtchnl_queue_select *vqs)
  * @vsi: VSI of the VF to configure
  * @q_idx: VF queue index used to determine the queue in the PF's space
  */
-static void ice_vf_ena_txq_interrupt(struct ice_vsi *vsi, u32 q_idx)
+void ice_vf_ena_txq_interrupt(struct ice_vsi *vsi, u32 q_idx)
 {
 	struct ice_hw *hw = &vsi->back->hw;
 	u32 pfq = vsi->txq_map[q_idx];
@@ -1450,7 +1450,7 @@ static void ice_vf_ena_txq_interrupt(struct ice_vsi *vsi, u32 q_idx)
  * @vsi: VSI of the VF to configure
  * @q_idx: VF queue index used to determine the queue in the PF's space
  */
-static void ice_vf_ena_rxq_interrupt(struct ice_vsi *vsi, u32 q_idx)
+void ice_vf_ena_rxq_interrupt(struct ice_vsi *vsi, u32 q_idx)
 {
 	struct ice_hw *hw = &vsi->back->hw;
 	u32 pfq = vsi->rxq_map[q_idx];
@@ -1566,8 +1566,7 @@ error_param:
  * disabled then clear q_id bit in the enabled queues bitmap and return
  * success. Otherwise return error.
  */
-static int
-ice_vf_vsi_dis_single_txq(struct ice_vf *vf, struct ice_vsi *vsi, u16 q_id)
+int ice_vf_vsi_dis_single_txq(struct ice_vf *vf, struct ice_vsi *vsi, u16 q_id)
 {
 	struct ice_txq_meta txq_meta = { 0 };
 	struct ice_tx_ring *ring;
@@ -2621,7 +2620,7 @@ static bool ice_vf_vlan_offload_ena(u32 caps)
  * ice_is_vlan_promisc_allowed - check if VLAN promiscuous config is allowed
  * @vf: VF used to determine if VLAN promiscuous config is allowed
  */
-static bool ice_is_vlan_promisc_allowed(struct ice_vf *vf)
+bool ice_is_vlan_promisc_allowed(struct ice_vf *vf)
 {
 	if ((test_bit(ICE_VF_STATE_UC_PROMISC, vf->vf_states) ||
 	     test_bit(ICE_VF_STATE_MC_PROMISC, vf->vf_states)) &&
@@ -2640,8 +2639,8 @@ static bool ice_is_vlan_promisc_allowed(struct ice_vf *vf)
  * This function should only be called if VLAN promiscuous mode is allowed,
  * which can be determined via ice_is_vlan_promisc_allowed().
  */
-static int ice_vf_ena_vlan_promisc(struct ice_vf *vf, struct ice_vsi *vsi,
-				   struct ice_vlan *vlan)
+int ice_vf_ena_vlan_promisc(struct ice_vf *vf, struct ice_vsi *vsi,
+			    struct ice_vlan *vlan)
 {
 	u8 promisc_m = 0;
 	int status;
@@ -3094,6 +3093,10 @@ static int ice_vc_set_rss_hashcfg(struct ice_vf *vf, u8 *msg)
 		v_ret = ice_err_to_virt_err(status);
 	}
 
+	/* save the requested VF configuration */
+	if (!v_ret)
+		vf->rss_hashcfg = vrh->hashcfg;
+
 	/* send the response to the VF */
 err:
 	return ice_vc_send_msg_to_vf(vf, VIRTCHNL_OP_SET_RSS_HASHCFG, v_ret,
@@ -3856,48 +3859,6 @@ ice_vc_ena_vlan_offload(struct ice_vsi *vsi,
 	return 0;
 }
 
-#define ICE_L2TSEL_QRX_CONTEXT_REG_IDX	3
-#define ICE_L2TSEL_BIT_OFFSET		23
-enum ice_l2tsel {
-	ICE_L2TSEL_EXTRACT_FIRST_TAG_L2TAG2_2ND,
-	ICE_L2TSEL_EXTRACT_FIRST_TAG_L2TAG1,
-};
-
-/**
- * ice_vsi_update_l2tsel - update l2tsel field for all Rx rings on this VSI
- * @vsi: VSI used to update l2tsel on
- * @l2tsel: l2tsel setting requested
- *
- * Use the l2tsel setting to update all of the Rx queue context bits for l2tsel.
- * This will modify which descriptor field the first offloaded VLAN will be
- * stripped into.
- */
-static void ice_vsi_update_l2tsel(struct ice_vsi *vsi, enum ice_l2tsel l2tsel)
-{
-	struct ice_hw *hw = &vsi->back->hw;
-	u32 l2tsel_bit;
-	int i;
-
-	if (l2tsel == ICE_L2TSEL_EXTRACT_FIRST_TAG_L2TAG2_2ND)
-		l2tsel_bit = 0;
-	else
-		l2tsel_bit = BIT(ICE_L2TSEL_BIT_OFFSET);
-
-	for (i = 0; i < vsi->alloc_rxq; i++) {
-		u16 pfq = vsi->rxq_map[i];
-		u32 qrx_context_offset;
-		u32 regval;
-
-		qrx_context_offset =
-			QRX_CONTEXT(ICE_L2TSEL_QRX_CONTEXT_REG_IDX, pfq);
-
-		regval = rd32(hw, qrx_context_offset);
-		regval &= ~BIT(ICE_L2TSEL_BIT_OFFSET);
-		regval |= l2tsel_bit;
-		wr32(hw, qrx_context_offset, regval);
-	}
-}
-
 /**
  * ice_vc_ena_vlan_stripping_v2_msg
  * @vf: VF the message was received from