ice: Initialize Flow Director resources

Flow Director allows for redirection based on ntuple rules. Rules are
programmed using the ethtool set-ntuple interface. Supported actions are
redirect to queue and drop.

Setup the initial framework to process Flow Director filters. Create and
allocate resources to manage and program filters to the hardware. Filters
are processed via a sideband interface; a control VSI is created to manage
communication and process requests through the sideband. Upon allocation of
resources, update the hardware tables to accept perfect filters.

Signed-off-by: Henry Tieman <henry.w.tieman@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 186 insertions, 24 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index c73c977f6967..43c949e0a760 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -19,6 +19,8 @@ const char *ice_vsi_type_str(enum ice_vsi_type vsi_type)
 		return "ICE_VSI_PF";
 	case ICE_VSI_VF:
 		return "ICE_VSI_VF";
+	case ICE_VSI_CTRL:
+		return "ICE_VSI_CTRL";
 	case ICE_VSI_LB:
 		return "ICE_VSI_LB";
 	default:
@@ -123,6 +125,7 @@ static void ice_vsi_set_num_desc(struct ice_vsi *vsi)
 {
 	switch (vsi->type) {
 	case ICE_VSI_PF:
+	case ICE_VSI_CTRL:
 	case ICE_VSI_LB:
 		vsi->num_rx_desc = ICE_DFLT_NUM_RX_DESC;
 		vsi->num_tx_desc = ICE_DFLT_NUM_TX_DESC;
@@ -187,6 +190,11 @@ static void ice_vsi_set_num_qs(struct ice_vsi *vsi, u16 vf_id)
 		 */
 		vsi->num_q_vectors = pf->num_msix_per_vf - ICE_NONQ_VECS_VF;
 		break;
+	case ICE_VSI_CTRL:
+		vsi->alloc_txq = 1;
+		vsi->alloc_rxq = 1;
+		vsi->num_q_vectors = 1;
+		break;
 	case ICE_VSI_LB:
 		vsi->alloc_txq = 1;
 		vsi->alloc_rxq = 1;
@@ -322,7 +330,7 @@ int ice_vsi_clear(struct ice_vsi *vsi)
 	/* updates the PF for this cleared VSI */
 
 	pf->vsi[vsi->idx] = NULL;
-	if (vsi->idx < pf->next_vsi)
+	if (vsi->idx < pf->next_vsi && vsi->type != ICE_VSI_CTRL)
 		pf->next_vsi = vsi->idx;
 
 	ice_vsi_free_arrays(vsi);
@@ -333,6 +341,25 @@ int ice_vsi_clear(struct ice_vsi *vsi)
 }
 
 /**
+ * ice_msix_clean_ctrl_vsi - MSIX mode interrupt handler for ctrl VSI
+ * @irq: interrupt number
+ * @data: pointer to a q_vector
+ */
+static irqreturn_t ice_msix_clean_ctrl_vsi(int __always_unused irq, void *data)
+{
+	struct ice_q_vector *q_vector = (struct ice_q_vector *)data;
+
+	if (!q_vector->tx.ring)
+		return IRQ_HANDLED;
+
+#define FDIR_RX_DESC_CLEAN_BUDGET 64
+	ice_clean_rx_irq(q_vector->rx.ring, FDIR_RX_DESC_CLEAN_BUDGET);
+	ice_clean_ctrl_tx_irq(q_vector->tx.ring);
+
+	return IRQ_HANDLED;
+}
+
+/**
  * ice_msix_clean_rings - MSIX mode Interrupt Handler
  * @irq: interrupt number
  * @data: pointer to a q_vector
@@ -383,8 +410,6 @@ ice_vsi_alloc(struct ice_pf *pf, enum ice_vsi_type vsi_type, u16 vf_id)
 	vsi->back = pf;
 	set_bit(__ICE_DOWN, vsi->state);
 
-	vsi->idx = pf->next_vsi;
-
 	if (vsi_type == ICE_VSI_VF)
 		ice_vsi_set_num_qs(vsi, vf_id);
 	else
@@ -398,6 +423,13 @@ ice_vsi_alloc(struct ice_pf *pf, enum ice_vsi_type vsi_type, u16 vf_id)
 		/* Setup default MSIX irq handler for VSI */
 		vsi->irq_handler = ice_msix_clean_rings;
 		break;
+	case ICE_VSI_CTRL:
+		if (ice_vsi_alloc_arrays(vsi))
+			goto err_rings;
+
+		/* Setup ctrl VSI MSIX irq handler */
+		vsi->irq_handler = ice_msix_clean_ctrl_vsi;
+		break;
 	case ICE_VSI_VF:
 		if (ice_vsi_alloc_arrays(vsi))
 			goto err_rings;
@@ -411,12 +443,20 @@ ice_vsi_alloc(struct ice_pf *pf, enum ice_vsi_type vsi_type, u16 vf_id)
 		goto unlock_pf;
 	}
 
-	/* fill VSI slot in the PF struct */
-	pf->vsi[pf->next_vsi] = vsi;
+	if (vsi->type == ICE_VSI_CTRL) {
+		/* Use the last VSI slot as the index for the control VSI */
+		vsi->idx = pf->num_alloc_vsi - 1;
+		pf->ctrl_vsi_idx = vsi->idx;
+		pf->vsi[vsi->idx] = vsi;
+	} else {
+		/* fill slot and make note of the index */
+		vsi->idx = pf->next_vsi;
+		pf->vsi[pf->next_vsi] = vsi;
 
-	/* prepare pf->next_vsi for next use */
-	pf->next_vsi = ice_get_free_slot(pf->vsi, pf->num_alloc_vsi,
-					 pf->next_vsi);
+		/* prepare pf->next_vsi for next use */
+		pf->next_vsi = ice_get_free_slot(pf->vsi, pf->num_alloc_vsi,
+						 pf->next_vsi);
+	}
 	goto unlock_pf;
 
 err_rings:
@@ -428,6 +468,48 @@ unlock_pf:
 }
 
 /**
+ * ice_alloc_fd_res - Allocate FD resource for a VSI
+ * @vsi: pointer to the ice_vsi
+ *
+ * This allocates the FD resources
+ *
+ * Returns 0 on success, -EPERM on no-op or -EIO on failure
+ */
+static int ice_alloc_fd_res(struct ice_vsi *vsi)
+{
+	struct ice_pf *pf = vsi->back;
+	u32 g_val, b_val;
+
+	/* Flow Director filters are only allocated/assigned to the PF VSI which
+	 * passes the traffic. The CTRL VSI is only used to add/delete filters
+	 * so we don't allocate resources to it
+	 */
+
+	/* FD filters from guaranteed pool per VSI */
+	g_val = pf->hw.func_caps.fd_fltr_guar;
+	if (!g_val)
+		return -EPERM;
+
+	/* FD filters from best effort pool */
+	b_val = pf->hw.func_caps.fd_fltr_best_effort;
+	if (!b_val)
+		return -EPERM;
+
+	if (vsi->type != ICE_VSI_PF)
+		return -EPERM;
+
+	if (!test_bit(ICE_FLAG_FD_ENA, pf->flags))
+		return -EPERM;
+
+	vsi->num_gfltr = g_val / pf->num_alloc_vsi;
+
+	/* each VSI gets same "best_effort" quota */
+	vsi->num_bfltr = b_val;
+
+	return 0;
+}
+
+/**
  * ice_vsi_get_qs - Assign queues from PF to VSI
  * @vsi: the VSI to assign queues to
  *
@@ -583,8 +665,8 @@ static void ice_vsi_set_rss_params(struct ice_vsi *vsi)
 	case ICE_VSI_LB:
 		break;
 	default:
-		dev_warn(ice_pf_to_dev(pf), "Unknown VSI type %d\n",
-			 vsi->type);
+		dev_dbg(ice_pf_to_dev(pf), "Unsupported VSI type %s\n",
+			ice_vsi_type_str(vsi->type));
 		break;
 	}
 }
@@ -754,6 +836,51 @@ static void ice_vsi_setup_q_map(struct ice_vsi *vsi, struct ice_vsi_ctx *ctxt)
 }
 
 /**
+ * ice_set_fd_vsi_ctx - Set FD VSI context before adding a VSI
+ * @ctxt: the VSI context being set
+ * @vsi: the VSI being configured
+ */
+static void ice_set_fd_vsi_ctx(struct ice_vsi_ctx *ctxt, struct ice_vsi *vsi)
+{
+	u8 dflt_q_group, dflt_q_prio;
+	u16 dflt_q, report_q, val;
+
+	if (vsi->type != ICE_VSI_PF && vsi->type != ICE_VSI_CTRL)
+		return;
+
+	val = ICE_AQ_VSI_PROP_FLOW_DIR_VALID;
+	ctxt->info.valid_sections |= cpu_to_le16(val);
+	dflt_q = 0;
+	dflt_q_group = 0;
+	report_q = 0;
+	dflt_q_prio = 0;
+
+	/* enable flow director filtering/programming */
+	val = ICE_AQ_VSI_FD_ENABLE | ICE_AQ_VSI_FD_PROG_ENABLE;
+	ctxt->info.fd_options = cpu_to_le16(val);
+	/* max of allocated flow director filters */
+	ctxt->info.max_fd_fltr_dedicated =
+			cpu_to_le16(vsi->num_gfltr);
+	/* max of shared flow director filters any VSI may program */
+	ctxt->info.max_fd_fltr_shared =
+			cpu_to_le16(vsi->num_bfltr);
+	/* default queue index within the VSI of the default FD */
+	val = ((dflt_q << ICE_AQ_VSI_FD_DEF_Q_S) &
+	       ICE_AQ_VSI_FD_DEF_Q_M);
+	/* target queue or queue group to the FD filter */
+	val |= ((dflt_q_group << ICE_AQ_VSI_FD_DEF_GRP_S) &
+		ICE_AQ_VSI_FD_DEF_GRP_M);
+	ctxt->info.fd_def_q = cpu_to_le16(val);
+	/* queue index on which FD filter completion is reported */
+	val = ((report_q << ICE_AQ_VSI_FD_REPORT_Q_S) &
+	       ICE_AQ_VSI_FD_REPORT_Q_M);
+	/* priority of the default qindex action */
+	val |= ((dflt_q_prio << ICE_AQ_VSI_FD_DEF_PRIORITY_S) &
+		ICE_AQ_VSI_FD_DEF_PRIORITY_M);
+	ctxt->info.fd_report_opt = cpu_to_le16(val);
+}
+
+/**
  * ice_set_rss_vsi_ctx - Set RSS VSI context before adding a VSI
  * @ctxt: the VSI context being set
  * @vsi: the VSI being configured
@@ -778,13 +905,10 @@ static void ice_set_rss_vsi_ctx(struct ice_vsi_ctx *ctxt, struct ice_vsi *vsi)
 		lut_type = ICE_AQ_VSI_Q_OPT_RSS_LUT_VSI;
 		hash_type = ICE_AQ_VSI_Q_OPT_RSS_TPLZ;
 		break;
-	case ICE_VSI_LB:
+	default:
 		dev_dbg(dev, "Unsupported VSI type %s\n",
 			ice_vsi_type_str(vsi->type));
 		return;
-	default:
-		dev_warn(dev, "Unknown VSI type %d\n", vsi->type);
-		return;
 	}
 
 	ctxt->info.q_opt_rss = ((lut_type << ICE_AQ_VSI_Q_OPT_RSS_LUT_S) &
@@ -816,6 +940,7 @@ static int ice_vsi_init(struct ice_vsi *vsi, bool init_vsi)
 
 	ctxt->info = vsi->info;
 	switch (vsi->type) {
+	case ICE_VSI_CTRL:
 	case ICE_VSI_LB:
 	case ICE_VSI_PF:
 		ctxt->flags = ICE_AQ_VSI_TYPE_PF;
@@ -831,12 +956,15 @@ static int ice_vsi_init(struct ice_vsi *vsi, bool init_vsi)
 	}
 
 	ice_set_dflt_vsi_ctx(ctxt);
+	if (test_bit(ICE_FLAG_FD_ENA, pf->flags))
+		ice_set_fd_vsi_ctx(ctxt, vsi);
 	/* 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;
 
 	/* Set LUT type and HASH type if RSS is enabled */
-	if (test_bit(ICE_FLAG_RSS_ENA, pf->flags)) {
+	if (test_bit(ICE_FLAG_RSS_ENA, pf->flags) &&
+	    vsi->type != ICE_VSI_CTRL) {
 		ice_set_rss_vsi_ctx(ctxt, vsi);
 		/* if updating VSI context, make sure to set valid_section:
 		 * to indicate which section of VSI context being updated
@@ -1986,10 +2114,12 @@ ice_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi,
 	if (vsi->type == ICE_VSI_VF)
 		vsi->vf_id = vf_id;
 
+	ice_alloc_fd_res(vsi);
+
 	if (ice_vsi_get_qs(vsi)) {
 		dev_err(dev, "Failed to allocate queues. vsi->idx = %d\n",
 			vsi->idx);
-		goto unroll_get_qs;
+		goto unroll_vsi_alloc;
 	}
 
 	/* set RSS capabilities */
@@ -2004,6 +2134,7 @@ ice_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi,
 		goto unroll_get_qs;
 
 	switch (vsi->type) {
+	case ICE_VSI_CTRL:
 	case ICE_VSI_PF:
 		ret = ice_vsi_alloc_q_vectors(vsi);
 		if (ret)
@@ -2034,14 +2165,16 @@ ice_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi,
 
 		ice_vsi_map_rings_to_vectors(vsi);
 
-		/* Do not exit if configuring RSS had an issue, at least
-		 * receive traffic on first queue. Hence no need to capture
-		 * return value
-		 */
-		if (test_bit(ICE_FLAG_RSS_ENA, pf->flags)) {
-			ice_vsi_cfg_rss_lut_key(vsi);
-			ice_vsi_set_rss_flow_fld(vsi);
-		}
+		/* ICE_VSI_CTRL does not need RSS so skip RSS processing */
+		if (vsi->type != ICE_VSI_CTRL)
+			/* Do not exit if configuring RSS had an issue, at
+			 * least receive traffic on first queue. Hence no
+			 * need to capture return value
+			 */
+			if (test_bit(ICE_FLAG_RSS_ENA, pf->flags)) {
+				ice_vsi_cfg_rss_lut_key(vsi);
+				ice_vsi_set_rss_flow_fld(vsi);
+			}
 		break;
 	case ICE_VSI_VF:
 		/* VF driver will take care of creating netdev for this type and
@@ -2122,6 +2255,7 @@ unroll_vsi_init:
 	ice_vsi_delete(vsi);
 unroll_get_qs:
 	ice_vsi_put_qs(vsi);
+unroll_vsi_alloc:
 	ice_vsi_clear(vsi);
 
 	return NULL;
@@ -2274,6 +2408,8 @@ int ice_ena_vsi(struct ice_vsi *vsi, bool locked)
 			if (!locked)
 				rtnl_unlock();
 		}
+	} else if (vsi->type == ICE_VSI_CTRL) {
+		err = ice_vsi_open_ctrl(vsi);
 	}
 
 	return err;
@@ -2303,6 +2439,8 @@ void ice_dis_vsi(struct ice_vsi *vsi, bool locked)
 		} else {
 			ice_vsi_close(vsi);
 		}
+	} else if (vsi->type == ICE_VSI_CTRL) {
+		ice_vsi_close(vsi);
 	}
 }
 
@@ -2849,6 +2987,30 @@ void ice_update_rx_ring_stats(struct ice_ring *rx_ring, u64 pkts, u64 bytes)
 }
 
 /**
+ * ice_status_to_errno - convert from enum ice_status to Linux errno
+ * @err: ice_status value to convert
+ */
+int ice_status_to_errno(enum ice_status err)
+{
+	switch (err) {
+	case ICE_SUCCESS:
+		return 0;
+	case ICE_ERR_DOES_NOT_EXIST:
+		return -ENOENT;
+	case ICE_ERR_OUT_OF_RANGE:
+		return -ENOTTY;
+	case ICE_ERR_PARAM:
+		return -EINVAL;
+	case ICE_ERR_NO_MEMORY:
+		return -ENOMEM;
+	case ICE_ERR_MAX_LIMIT:
+		return -EAGAIN;
+	default:
+		return -EINVAL;
+	}
+}
+
+/**
  * ice_is_dflt_vsi_in_use - check if the default forwarding VSI is being used
  * @sw: switch to check if its default forwarding VSI is free
  *