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Message-Id: <20210422173130.1143082-9-anthony.l.nguyen@intel.com>
Date: Thu, 22 Apr 2021 10:31:26 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net, kuba@...nel.org
Cc: Qi Zhang <qi.z.zhang@...el.com>, netdev@...r.kernel.org,
sassmann@...hat.com, anthony.l.nguyen@...el.com,
Vignesh Sridhar <vignesh.sridhar@...el.com>,
Jia Guo <jia.guo@...el.com>,
Haiyue Wang <haiyue.wang@...el.com>,
Bo Chen <BoX.C.Chen@...el.com>
Subject: [PATCH net-next 08/12] ice: Support RSS configure removal for AVF
From: Qi Zhang <qi.z.zhang@...el.com>
Add the handler for virtchnl message VIRTCHNL_OP_DEL_RSS_CFG to remove
an existing RSS configuration with matching hashed fields.
Signed-off-by: Vignesh Sridhar <vignesh.sridhar@...el.com>
Co-developed-by: Jia Guo <jia.guo@...el.com>
Signed-off-by: Jia Guo <jia.guo@...el.com>
Signed-off-by: Qi Zhang <qi.z.zhang@...el.com>
Signed-off-by: Haiyue Wang <haiyue.wang@...el.com>
Tested-by: Bo Chen <BoX.C.Chen@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
drivers/net/ethernet/intel/ice/ice_flow.c | 88 +++++++++++++++++++
drivers/net/ethernet/intel/ice/ice_flow.h | 3 +
.../net/ethernet/intel/ice/ice_virtchnl_pf.c | 16 +++-
3 files changed, 105 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_flow.c b/drivers/net/ethernet/intel/ice/ice_flow.c
index 4d59eb96383b..f160672448a0 100644
--- a/drivers/net/ethernet/intel/ice/ice_flow.c
+++ b/drivers/net/ethernet/intel/ice/ice_flow.c
@@ -2149,6 +2149,94 @@ ice_add_rss_cfg(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds,
return status;
}
+/**
+ * ice_rem_rss_cfg_sync - remove an existing RSS configuration
+ * @hw: pointer to the hardware structure
+ * @vsi_handle: software VSI handle
+ * @hashed_flds: Packet hash types (ICE_FLOW_HASH_*) to remove
+ * @addl_hdrs: Protocol header fields within a packet segment
+ * @segs_cnt: packet segment count
+ *
+ * Assumption: lock has already been acquired for RSS list
+ */
+static enum ice_status
+ice_rem_rss_cfg_sync(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds,
+ u32 addl_hdrs, u8 segs_cnt)
+{
+ const enum ice_block blk = ICE_BLK_RSS;
+ struct ice_flow_seg_info *segs;
+ struct ice_flow_prof *prof;
+ enum ice_status status;
+
+ segs = kcalloc(segs_cnt, sizeof(*segs), GFP_KERNEL);
+ if (!segs)
+ return ICE_ERR_NO_MEMORY;
+
+ /* Construct the packet segment info from the hashed fields */
+ status = ice_flow_set_rss_seg_info(&segs[segs_cnt - 1], hashed_flds,
+ addl_hdrs);
+ if (status)
+ goto out;
+
+ prof = ice_flow_find_prof_conds(hw, blk, ICE_FLOW_RX, segs, segs_cnt,
+ vsi_handle,
+ ICE_FLOW_FIND_PROF_CHK_FLDS);
+ if (!prof) {
+ status = ICE_ERR_DOES_NOT_EXIST;
+ goto out;
+ }
+
+ status = ice_flow_disassoc_prof(hw, blk, prof, vsi_handle);
+ if (status)
+ goto out;
+
+ /* Remove RSS configuration from VSI context before deleting
+ * the flow profile.
+ */
+ ice_rem_rss_list(hw, vsi_handle, prof);
+
+ if (bitmap_empty(prof->vsis, ICE_MAX_VSI))
+ status = ice_flow_rem_prof(hw, blk, prof->id);
+
+out:
+ kfree(segs);
+ return status;
+}
+
+/**
+ * ice_rem_rss_cfg - remove an existing RSS config with matching hashed fields
+ * @hw: pointer to the hardware structure
+ * @vsi_handle: software VSI handle
+ * @hashed_flds: Packet hash types (ICE_FLOW_HASH_*) to remove
+ * @addl_hdrs: Protocol header fields within a packet segment
+ *
+ * This function will lookup the flow profile based on the input
+ * hash field bitmap, iterate through the profile entry list of
+ * that profile and find entry associated with input VSI to be
+ * removed. Calls are made to underlying flow s which will APIs
+ * turn build or update buffers for RSS XLT1 section.
+ */
+enum ice_status __maybe_unused
+ice_rem_rss_cfg(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds,
+ u32 addl_hdrs)
+{
+ enum ice_status status;
+
+ if (hashed_flds == ICE_HASH_INVALID ||
+ !ice_is_vsi_valid(hw, vsi_handle))
+ return ICE_ERR_PARAM;
+
+ mutex_lock(&hw->rss_locks);
+ status = ice_rem_rss_cfg_sync(hw, vsi_handle, hashed_flds, addl_hdrs,
+ ICE_RSS_OUTER_HEADERS);
+ if (!status)
+ status = ice_rem_rss_cfg_sync(hw, vsi_handle, hashed_flds,
+ addl_hdrs, ICE_RSS_INNER_HEADERS);
+ mutex_unlock(&hw->rss_locks);
+
+ return status;
+}
+
/* Mapping of AVF hash bit fields to an L3-L4 hash combination.
* As the ice_flow_avf_hdr_field represent individual bit shifts in a hash,
* convert its values to their appropriate flow L3, L4 values.
diff --git a/drivers/net/ethernet/intel/ice/ice_flow.h b/drivers/net/ethernet/intel/ice/ice_flow.h
index 2f68b59ace7e..2a2d8c1536cb 100644
--- a/drivers/net/ethernet/intel/ice/ice_flow.h
+++ b/drivers/net/ethernet/intel/ice/ice_flow.h
@@ -409,5 +409,8 @@ enum ice_status ice_rem_vsi_rss_cfg(struct ice_hw *hw, u16 vsi_handle);
enum ice_status
ice_add_rss_cfg(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds,
u32 addl_hdrs);
+enum ice_status
+ice_rem_rss_cfg(struct ice_hw *hw, u16 vsi_handle, u64 hashed_flds,
+ u32 addl_hdrs);
u64 ice_get_rss_cfg(struct ice_hw *hw, u16 vsi_handle, u32 hdrs);
#endif /* _ICE_FLOW_H_ */
diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
index ca778a80d363..a1d22d2aa0bd 100644
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
@@ -2672,8 +2672,20 @@ static int ice_vc_handle_rss_cfg(struct ice_vf *vf, u8 *msg, bool add)
vsi->vsi_num, v_ret);
}
} else {
- v_ret = VIRTCHNL_STATUS_ERR_NOT_SUPPORTED;
- dev_err(dev, "RSS removal not supported\n");
+ enum ice_status status;
+
+ status = ice_rem_rss_cfg(hw, vsi->idx, hash_flds,
+ addl_hdrs);
+ /* We just ignore ICE_ERR_DOES_NOT_EXIST, because
+ * if two configurations share the same profile remove
+ * one of them actually removes both, since the
+ * profile is deleted.
+ */
+ if (status && status != ICE_ERR_DOES_NOT_EXIST) {
+ v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+ dev_err(dev, "ice_rem_rss_cfg failed for VF ID:%d, error:%s\n",
+ vf->vf_id, ice_stat_str(status));
+ }
}
}
--
2.26.2
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