[net-next 05/16] ice: fix stack hogs from struct ice_vsi_ctx structures

[Jeff Kirsher <jeffrey.t.kirsher@intel.com>]

From: Bruce Allan <bruce.w.allan@intel.com>

struct ice_vsi_ctx has gotten large enough that function local declarations
of it on the stack are causing stack hogs.  Fix that by allocating the
structs on heap.  Cleanup some formatting issues in the code around these
changes and fix incorrect data type uses of returned functions in a couple
places.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_lib.c      | 98 ++++++++++++-------
 drivers/net/ethernet/intel/ice/ice_main.c     | 27 +++--
 .../net/ethernet/intel/ice/ice_virtchnl_pf.c  | 59 ++++++-----
 3 files changed, 117 insertions(+), 67 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 82aae530d6c5..d93a0d5a783c 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -348,19 +348,25 @@ static int ice_get_free_slot(void *array, int size, int curr)
 void ice_vsi_delete(struct ice_vsi *vsi)
 {
 	struct ice_pf *pf = vsi->back;
-	struct ice_vsi_ctx ctxt;
+	struct ice_vsi_ctx *ctxt;
 	enum ice_status status;
 
+	ctxt = devm_kzalloc(&pf->pdev->dev, sizeof(*ctxt), GFP_KERNEL);
+	if (!ctxt)
+		return;
+
 	if (vsi->type == ICE_VSI_VF)
-		ctxt.vf_num = vsi->vf_id;
-	ctxt.vsi_num = vsi->vsi_num;
+		ctxt->vf_num = vsi->vf_id;
+	ctxt->vsi_num = vsi->vsi_num;
 
-	memcpy(&ctxt.info, &vsi->info, sizeof(ctxt.info));
+	memcpy(&ctxt->info, &vsi->info, sizeof(ctxt->info));
 
-	status = ice_free_vsi(&pf->hw, vsi->idx, &ctxt, false, NULL);
+	status = ice_free_vsi(&pf->hw, vsi->idx, ctxt, false, NULL);
 	if (status)
 		dev_err(&pf->pdev->dev, "Failed to delete VSI %i in FW\n",
 			vsi->vsi_num);
+
+	devm_kfree(&pf->pdev->dev, ctxt);
 }
 
 /**
@@ -908,37 +914,41 @@ static void ice_set_rss_vsi_ctx(struct ice_vsi_ctx *ctxt, struct ice_vsi *vsi)
  */
 static int ice_vsi_init(struct ice_vsi *vsi)
 {
-	struct ice_vsi_ctx ctxt = { 0 };
 	struct ice_pf *pf = vsi->back;
 	struct ice_hw *hw = &pf->hw;
+	struct ice_vsi_ctx *ctxt;
 	int ret = 0;
 
+	ctxt = devm_kzalloc(&pf->pdev->dev, sizeof(*ctxt), GFP_KERNEL);
+	if (!ctxt)
+		return -ENOMEM;
+
 	switch (vsi->type) {
 	case ICE_VSI_PF:
-		ctxt.flags = ICE_AQ_VSI_TYPE_PF;
+		ctxt->flags = ICE_AQ_VSI_TYPE_PF;
 		break;
 	case ICE_VSI_VF:
-		ctxt.flags = ICE_AQ_VSI_TYPE_VF;
+		ctxt->flags = ICE_AQ_VSI_TYPE_VF;
 		/* VF number here is the absolute VF number (0-255) */
-		ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
+		ctxt->vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
 		break;
 	default:
 		return -ENODEV;
 	}
 
-	ice_set_dflt_vsi_ctx(&ctxt);
+	ice_set_dflt_vsi_ctx(ctxt);
 	/* if the switch is in VEB mode, allow VSI loopback */
 	if (vsi->vsw->bridge_mode == BRIDGE_MODE_VEB)
-		ctxt.info.sw_flags |= ICE_AQ_VSI_SW_FLAG_ALLOW_LB;
+		ctxt->info.sw_flags |= ICE_AQ_VSI_SW_FLAG_ALLOW_LB;
 
 	/* Set LUT type and HASH type if RSS is enabled */
 	if (test_bit(ICE_FLAG_RSS_ENA, pf->flags))
-		ice_set_rss_vsi_ctx(&ctxt, vsi);
+		ice_set_rss_vsi_ctx(ctxt, vsi);
 
-	ctxt.info.sw_id = vsi->port_info->sw_id;
-	ice_vsi_setup_q_map(vsi, &ctxt);
+	ctxt->info.sw_id = vsi->port_info->sw_id;
+	ice_vsi_setup_q_map(vsi, ctxt);
 
-	ret = ice_add_vsi(hw, vsi->idx, &ctxt, NULL);
+	ret = ice_add_vsi(hw, vsi->idx, ctxt, NULL);
 	if (ret) {
 		dev_err(&pf->pdev->dev,
 			"Add VSI failed, err %d\n", ret);
@@ -946,11 +956,12 @@ static int ice_vsi_init(struct ice_vsi *vsi)
 	}
 
 	/* keep context for update VSI operations */
-	vsi->info = ctxt.info;
+	vsi->info = ctxt->info;
 
 	/* record VSI number returned */
-	vsi->vsi_num = ctxt.vsi_num;
+	vsi->vsi_num = ctxt->vsi_num;
 
+	devm_kfree(&pf->pdev->dev, ctxt);
 	return ret;
 }
 
@@ -1823,26 +1834,34 @@ int ice_vsi_manage_vlan_insertion(struct ice_vsi *vsi)
 {
 	struct device *dev = &vsi->back->pdev->dev;
 	struct ice_hw *hw = &vsi->back->hw;
-	struct ice_vsi_ctx ctxt = { 0 };
+	struct ice_vsi_ctx *ctxt;
 	enum ice_status status;
+	int ret = 0;
+
+	ctxt = devm_kzalloc(dev, sizeof(*ctxt), GFP_KERNEL);
+	if (!ctxt)
+		return -ENOMEM;
 
 	/* Here we are configuring the VSI to let the driver add VLAN tags by
 	 * setting vlan_flags to ICE_AQ_VSI_VLAN_MODE_ALL. The actual VLAN tag
 	 * insertion happens in the Tx hot path, in ice_tx_map.
 	 */
-	ctxt.info.vlan_flags = ICE_AQ_VSI_VLAN_MODE_ALL;
+	ctxt->info.vlan_flags = ICE_AQ_VSI_VLAN_MODE_ALL;
 
-	ctxt.info.valid_sections = cpu_to_le16(ICE_AQ_VSI_PROP_VLAN_VALID);
+	ctxt->info.valid_sections = cpu_to_le16(ICE_AQ_VSI_PROP_VLAN_VALID);
 
-	status = ice_update_vsi(hw, vsi->idx, &ctxt, NULL);
+	status = ice_update_vsi(hw, vsi->idx, ctxt, NULL);
 	if (status) {
 		dev_err(dev, "update VSI for VLAN insert failed, err %d aq_err %d\n",
 			status, hw->adminq.sq_last_status);
-		return -EIO;
+		ret = -EIO;
+		goto out;
 	}
 
-	vsi->info.vlan_flags = ctxt.info.vlan_flags;
-	return 0;
+	vsi->info.vlan_flags = ctxt->info.vlan_flags;
+out:
+	devm_kfree(dev, ctxt);
+	return ret;
 }
 
 /**
@@ -1854,35 +1873,42 @@ int ice_vsi_manage_vlan_stripping(struct ice_vsi *vsi, bool ena)
 {
 	struct device *dev = &vsi->back->pdev->dev;
 	struct ice_hw *hw = &vsi->back->hw;
-	struct ice_vsi_ctx ctxt = { 0 };
+	struct ice_vsi_ctx *ctxt;
 	enum ice_status status;
+	int ret = 0;
+
+	ctxt = devm_kzalloc(dev, sizeof(*ctxt), GFP_KERNEL);
+	if (!ctxt)
+		return -ENOMEM;
 
 	/* Here we are configuring what the VSI should do with the VLAN tag in
 	 * the Rx packet. We can either leave the tag in the packet or put it in
 	 * the Rx descriptor.
 	 */
-	if (ena) {
+	if (ena)
 		/* Strip VLAN tag from Rx packet and put it in the desc */
-		ctxt.info.vlan_flags = ICE_AQ_VSI_VLAN_EMOD_STR_BOTH;
-	} else {
+		ctxt->info.vlan_flags = ICE_AQ_VSI_VLAN_EMOD_STR_BOTH;
+	else
 		/* Disable stripping. Leave tag in packet */
-		ctxt.info.vlan_flags = ICE_AQ_VSI_VLAN_EMOD_NOTHING;
-	}
+		ctxt->info.vlan_flags = ICE_AQ_VSI_VLAN_EMOD_NOTHING;
 
 	/* Allow all packets untagged/tagged */
-	ctxt.info.vlan_flags |= ICE_AQ_VSI_VLAN_MODE_ALL;
+	ctxt->info.vlan_flags |= ICE_AQ_VSI_VLAN_MODE_ALL;
 
-	ctxt.info.valid_sections = cpu_to_le16(ICE_AQ_VSI_PROP_VLAN_VALID);
+	ctxt->info.valid_sections = cpu_to_le16(ICE_AQ_VSI_PROP_VLAN_VALID);
 
-	status = ice_update_vsi(hw, vsi->idx, &ctxt, NULL);
+	status = ice_update_vsi(hw, vsi->idx, ctxt, NULL);
 	if (status) {
 		dev_err(dev, "update VSI for VLAN strip failed, ena = %d err %d aq_err %d\n",
 			ena, status, hw->adminq.sq_last_status);
-		return -EIO;
+		ret = -EIO;
+		goto out;
 	}
 
-	vsi->info.vlan_flags = ctxt.info.vlan_flags;
-	return 0;
+	vsi->info.vlan_flags = ctxt->info.vlan_flags;
+out:
+	devm_kfree(dev, ctxt);
+	return ret;
 }
 
 /**
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 0731b8994958..aff348e42562 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -3707,30 +3707,39 @@ static int ice_vsi_update_bridge_mode(struct ice_vsi *vsi, u16 bmode)
 	struct device *dev = &vsi->back->pdev->dev;
 	struct ice_aqc_vsi_props *vsi_props;
 	struct ice_hw *hw = &vsi->back->hw;
-	struct ice_vsi_ctx ctxt = { 0 };
+	struct ice_vsi_ctx *ctxt;
 	enum ice_status status;
+	int ret = 0;
 
 	vsi_props = &vsi->info;
-	ctxt.info = vsi->info;
+
+	ctxt = devm_kzalloc(dev, sizeof(*ctxt), GFP_KERNEL);
+	if (!ctxt)
+		return -ENOMEM;
+
+	ctxt->info = vsi->info;
 
 	if (bmode == BRIDGE_MODE_VEB)
 		/* change from VEPA to VEB mode */
-		ctxt.info.sw_flags |= ICE_AQ_VSI_SW_FLAG_ALLOW_LB;
+		ctxt->info.sw_flags |= ICE_AQ_VSI_SW_FLAG_ALLOW_LB;
 	else
 		/* change from VEB to VEPA mode */
-		ctxt.info.sw_flags &= ~ICE_AQ_VSI_SW_FLAG_ALLOW_LB;
-	ctxt.info.valid_sections = cpu_to_le16(ICE_AQ_VSI_PROP_SW_VALID);
+		ctxt->info.sw_flags &= ~ICE_AQ_VSI_SW_FLAG_ALLOW_LB;
+	ctxt->info.valid_sections = cpu_to_le16(ICE_AQ_VSI_PROP_SW_VALID);
 
-	status = ice_update_vsi(hw, vsi->idx, &ctxt, NULL);
+	status = ice_update_vsi(hw, vsi->idx, ctxt, NULL);
 	if (status) {
 		dev_err(dev, "update VSI for bridge mode failed, bmode = %d err %d aq_err %d\n",
 			bmode, status, hw->adminq.sq_last_status);
-		return -EIO;
+		ret = -EIO;
+		goto out;
 	}
 	/* Update sw flags for book keeping */
-	vsi_props->sw_flags = ctxt.info.sw_flags;
+	vsi_props->sw_flags = ctxt->info.sw_flags;
 
-	return 0;
+out:
+	devm_kfree(dev, ctxt);
+	return ret;
 }
 
 /**
diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
index 80b50e67cbef..79d793a76042 100644
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
@@ -345,25 +345,33 @@ static int ice_vsi_set_pvid(struct ice_vsi *vsi, u16 vid)
 {
 	struct device *dev = &vsi->back->pdev->dev;
 	struct ice_hw *hw = &vsi->back->hw;
-	struct ice_vsi_ctx ctxt = { 0 };
+	struct ice_vsi_ctx *ctxt;
 	enum ice_status status;
+	int ret = 0;
+
+	ctxt = devm_kzalloc(dev, sizeof(*ctxt), GFP_KERNEL);
+	if (!ctxt)
+		return -ENOMEM;
 
-	ctxt.info.vlan_flags = ICE_AQ_VSI_VLAN_MODE_UNTAGGED |
-			       ICE_AQ_VSI_PVLAN_INSERT_PVID |
-			       ICE_AQ_VSI_VLAN_EMOD_STR;
-	ctxt.info.pvid = cpu_to_le16(vid);
-	ctxt.info.valid_sections = cpu_to_le16(ICE_AQ_VSI_PROP_VLAN_VALID);
+	ctxt->info.vlan_flags = (ICE_AQ_VSI_VLAN_MODE_UNTAGGED |
+				 ICE_AQ_VSI_PVLAN_INSERT_PVID |
+				 ICE_AQ_VSI_VLAN_EMOD_STR);
+	ctxt->info.pvid = cpu_to_le16(vid);
+	ctxt->info.valid_sections = cpu_to_le16(ICE_AQ_VSI_PROP_VLAN_VALID);
 
-	status = ice_update_vsi(hw, vsi->idx, &ctxt, NULL);
+	status = ice_update_vsi(hw, vsi->idx, ctxt, NULL);
 	if (status) {
 		dev_info(dev, "update VSI for VLAN insert failed, err %d aq_err %d\n",
 			 status, hw->adminq.sq_last_status);
-		return -EIO;
+		ret = -EIO;
+		goto out;
 	}
 
-	vsi->info.pvid = ctxt.info.pvid;
-	vsi->info.vlan_flags = ctxt.info.vlan_flags;
-	return 0;
+	vsi->info.pvid = ctxt->info.pvid;
+	vsi->info.vlan_flags = ctxt->info.vlan_flags;
+out:
+	devm_kfree(dev, ctxt);
+	return ret;
 }
 
 /**
@@ -2479,11 +2487,12 @@ int ice_get_vf_cfg(struct net_device *netdev, int vf_id,
 int ice_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool ena)
 {
 	struct ice_netdev_priv *np = netdev_priv(netdev);
-	struct ice_vsi_ctx ctx = { 0 };
 	struct ice_vsi *vsi = np->vsi;
 	struct ice_pf *pf = vsi->back;
+	struct ice_vsi_ctx *ctx;
+	enum ice_status status;
 	struct ice_vf *vf;
-	int status;
+	int ret = 0;
 
 	/* validate the request */
 	if (vf_id >= pf->num_alloc_vfs) {
@@ -2503,25 +2512,31 @@ int ice_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool ena)
 		return 0;
 	}
 
-	ctx.info.valid_sections = cpu_to_le16(ICE_AQ_VSI_PROP_SECURITY_VALID);
+	ctx = devm_kzalloc(&pf->pdev->dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->info.valid_sections = cpu_to_le16(ICE_AQ_VSI_PROP_SECURITY_VALID);
 
 	if (ena) {
-		ctx.info.sec_flags |= ICE_AQ_VSI_SEC_FLAG_ENA_MAC_ANTI_SPOOF;
-		ctx.info.sw_flags2 |= ICE_AQ_VSI_SW_FLAG_RX_PRUNE_EN_M;
+		ctx->info.sec_flags |= ICE_AQ_VSI_SEC_FLAG_ENA_MAC_ANTI_SPOOF;
+		ctx->info.sw_flags2 |= ICE_AQ_VSI_SW_FLAG_RX_PRUNE_EN_M;
 	}
 
-	status = ice_update_vsi(&pf->hw, vsi->idx, &ctx, NULL);
+	status = ice_update_vsi(&pf->hw, vsi->idx, ctx, NULL);
 	if (status) {
 		dev_dbg(&pf->pdev->dev,
 			"Error %d, failed to update VSI* parameters\n", status);
-		return -EIO;
+		ret = -EIO;
+		goto out;
 	}
 
 	vf->spoofchk = ena;
-	vsi->info.sec_flags = ctx.info.sec_flags;
-	vsi->info.sw_flags2 = ctx.info.sw_flags2;
-
-	return status;
+	vsi->info.sec_flags = ctx->info.sec_flags;
+	vsi->info.sw_flags2 = ctx->info.sw_flags2;
+out:
+	devm_kfree(&pf->pdev->dev, ctx);
+	return ret;
 }
 
 /**
-- 
2.20.1