ice: refactor VSI setup to use parameter structure

The ice_vsi_setup function, ice_vsi_alloc, and ice_vsi_cfg functions have
grown a large number of parameters. These parameters are used to initialize
a new VSI, as well as re-configure an existing VSI

Any time we want to add a new parameter to this function chain, even if it
will usually be unset, we have to change many call sites due to changing
the function signature.

A future change is going to refactor ice_vsi_alloc and ice_vsi_cfg to move
the VSI configuration and initialization all into ice_vsi_cfg.

Before this, refactor the VSI setup flow to use a new ice_vsi_cfg_params
structure. This will contain the configuration (mainly pointers) used to
initialize a VSI.

Pass this from ice_vsi_setup into the related functions such as
ice_vsi_alloc, ice_vsi_cfg, and ice_vsi_cfg_def.

Introduce a helper, ice_vsi_to_params to convert an existing VSI to the
parameters used to initialize it. This will aid in the flows where we
rebuild an existing VSI.

Since we also pass the ICE_VSI_FLAG_INIT to more functions which do not
need (or cannot yet have) the VSI parameters, lets make this clear by
renaming the function parameter to vsi_flags and using a u32 instead of a
signed integer. The name vsi_flags also makes it clear that we may extend
the flags in the future.

This change will make it easier to refactor the setup flow in the future,
and will reduce the complexity required to add a new parameter for
configuration in the future.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 47 insertions, 45 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index da64216e680e..90592a231bcb 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -639,10 +639,7 @@ ice_vsi_alloc_def(struct ice_vsi *vsi, struct ice_channel *ch)
 /**
  * ice_vsi_alloc - Allocates the next available struct VSI in the PF
  * @pf: board private structure
- * @pi: pointer to the port_info instance
- * @vsi_type: type of VSI
- * @ch: ptr to channel
- * @vf: VF for ICE_VSI_VF and ICE_VSI_CTRL
+ * @params: parameters to use when allocating the new VSI
  *
  * The VF pointer is used for ICE_VSI_VF and ICE_VSI_CTRL. For ICE_VSI_CTRL,
  * it may be NULL in the case there is no association with a VF. For
@@ -651,14 +648,12 @@ ice_vsi_alloc_def(struct ice_vsi *vsi, struct ice_channel *ch)
  * returns a pointer to a VSI on success, NULL on failure.
  */
 static struct ice_vsi *
-ice_vsi_alloc(struct ice_pf *pf, struct ice_port_info *pi,
-	      enum ice_vsi_type vsi_type, struct ice_channel *ch,
-	      struct ice_vf *vf)
+ice_vsi_alloc(struct ice_pf *pf, struct ice_vsi_cfg_params *params)
 {
 	struct device *dev = ice_pf_to_dev(pf);
 	struct ice_vsi *vsi = NULL;
 
-	if (WARN_ON(vsi_type == ICE_VSI_VF && !vf))
+	if (WARN_ON(params->type == ICE_VSI_VF && !params->vf))
 		return NULL;
 
 	/* Need to protect the allocation of the VSIs at the PF level */
@@ -677,11 +672,11 @@ ice_vsi_alloc(struct ice_pf *pf, struct ice_port_info *pi,
 	if (!vsi)
 		goto unlock_pf;
 
-	vsi->type = vsi_type;
+	vsi->type = params->type;
 	vsi->back = pf;
-	vsi->port_info = pi;
+	vsi->port_info = params->pi;
 	/* For VSIs which don't have a connected VF, this will be NULL */
-	vsi->vf = vf;
+	vsi->vf = params->vf;
 	set_bit(ICE_VSI_DOWN, vsi->state);
 
 	/* fill slot and make note of the index */
@@ -693,8 +688,9 @@ ice_vsi_alloc(struct ice_pf *pf, struct ice_port_info *pi,
 					 pf->next_vsi);
 
 	if (vsi->type == ICE_VSI_CTRL) {
-		if (vf) {
-			vf->ctrl_vsi_idx = vsi->idx;
+		if (vsi->vf) {
+			WARN_ON(vsi->vf->ctrl_vsi_idx != ICE_NO_VSI);
+			vsi->vf->ctrl_vsi_idx = vsi->idx;
 		} else {
 			WARN_ON(pf->ctrl_vsi_idx != ICE_NO_VSI);
 			pf->ctrl_vsi_idx = vsi->idx;
@@ -1265,12 +1261,15 @@ ice_chnl_vsi_setup_q_map(struct ice_vsi *vsi, struct ice_vsi_ctx *ctxt)
 /**
  * ice_vsi_init - Create and initialize a VSI
  * @vsi: the VSI being configured
- * @init_vsi: flag, tell if VSI need to be initialized
+ * @vsi_flags: VSI configuration flags
+ *
+ * Set ICE_FLAG_VSI_INIT to initialize a new VSI context, clear it to
+ * reconfigure an existing context.
  *
  * This initializes a VSI context depending on the VSI type to be added and
  * passes it down to the add_vsi aq command to create a new VSI.
  */
-static int ice_vsi_init(struct ice_vsi *vsi, int init_vsi)
+static int ice_vsi_init(struct ice_vsi *vsi, u32 vsi_flags)
 {
 	struct ice_pf *pf = vsi->back;
 	struct ice_hw *hw = &pf->hw;
@@ -1332,7 +1331,7 @@ static int ice_vsi_init(struct ice_vsi *vsi, int init_vsi)
 		/* if updating VSI context, make sure to set valid_section:
 		 * to indicate which section of VSI context being updated
 		 */
-		if (!(init_vsi & ICE_VSI_FLAG_INIT))
+		if (!(vsi_flags & ICE_VSI_FLAG_INIT))
 			ctxt->info.valid_sections |=
 				cpu_to_le16(ICE_AQ_VSI_PROP_Q_OPT_VALID);
 	}
@@ -1345,7 +1344,7 @@ static int ice_vsi_init(struct ice_vsi *vsi, int init_vsi)
 		if (ret)
 			goto out;
 
-		if (!(init_vsi & ICE_VSI_FLAG_INIT))
+		if (!(vsi_flags & ICE_VSI_FLAG_INIT))
 			/* means VSI being updated */
 			/* must to indicate which section of VSI context are
 			 * being modified
@@ -1361,7 +1360,7 @@ static int ice_vsi_init(struct ice_vsi *vsi, int init_vsi)
 			cpu_to_le16(ICE_AQ_VSI_PROP_SECURITY_VALID);
 	}
 
-	if (init_vsi & ICE_VSI_FLAG_INIT) {
+	if (vsi_flags & ICE_VSI_FLAG_INIT) {
 		ret = ice_add_vsi(hw, vsi->idx, ctxt, NULL);
 		if (ret) {
 			dev_err(dev, "Add VSI failed, err %d\n", ret);
@@ -2700,11 +2699,10 @@ static int ice_vsi_cfg_tc_lan(struct ice_pf *pf, struct ice_vsi *vsi)
 /**
  * ice_vsi_cfg_def - configure default VSI based on the type
  * @vsi: pointer to VSI
- * @ch: ptr to channel
- * @init_vsi: is this an initialization or a reconfigure of the VSI
+ * @params: the parameters to configure this VSI with
  */
 static int
-ice_vsi_cfg_def(struct ice_vsi *vsi, struct ice_channel *ch, int init_vsi)
+ice_vsi_cfg_def(struct ice_vsi *vsi, struct ice_vsi_cfg_params *params)
 {
 	struct device *dev = ice_pf_to_dev(vsi->back);
 	struct ice_pf *pf = vsi->back;
@@ -2712,7 +2710,7 @@ ice_vsi_cfg_def(struct ice_vsi *vsi, struct ice_channel *ch, int init_vsi)
 
 	vsi->vsw = pf->first_sw;
 
-	ret = ice_vsi_alloc_def(vsi, ch);
+	ret = ice_vsi_alloc_def(vsi, params->ch);
 	if (ret)
 		return ret;
 
@@ -2735,7 +2733,7 @@ ice_vsi_cfg_def(struct ice_vsi *vsi, struct ice_channel *ch, int init_vsi)
 	ice_vsi_set_tc_cfg(vsi);
 
 	/* create the VSI */
-	ret = ice_vsi_init(vsi, init_vsi);
+	ret = ice_vsi_init(vsi, params->flags);
 	if (ret)
 		goto unroll_get_qs;
 
@@ -2860,17 +2858,13 @@ unroll_vsi_alloc:
 /**
  * ice_vsi_cfg - configure VSI and tc on it
  * @vsi: pointer to VSI
- * @vf: pointer to VF to which this VSI connects. This field is used primarily
- *      for the ICE_VSI_VF type. Other VSI types should pass NULL.
- * @ch: ptr to channel
- * @init_vsi: is this an initialization or a reconfigure of the VSI
+ * @params: parameters used to configure this VSI
  */
-int ice_vsi_cfg(struct ice_vsi *vsi, struct ice_vf *vf, struct ice_channel *ch,
-		int init_vsi)
+int ice_vsi_cfg(struct ice_vsi *vsi, struct ice_vsi_cfg_params *params)
 {
 	int ret;
 
-	ret = ice_vsi_cfg_def(vsi, ch, init_vsi);
+	ret = ice_vsi_cfg_def(vsi, params);
 	if (ret)
 		return ret;
 
@@ -2941,11 +2935,7 @@ void ice_vsi_decfg(struct ice_vsi *vsi)
 /**
  * ice_vsi_setup - Set up a VSI by a given type
  * @pf: board private structure
- * @pi: pointer to the port_info instance
- * @vsi_type: VSI type
- * @vf: pointer to VF to which this VSI connects. This field is used primarily
- *      for the ICE_VSI_VF type. Other VSI types should pass NULL.
- * @ch: ptr to channel
+ * @params: parameters to use when creating the VSI
  *
  * This allocates the sw VSI structure and its queue resources.
  *
@@ -2953,21 +2943,26 @@ void ice_vsi_decfg(struct ice_vsi *vsi)
  * success, NULL on failure.
  */
 struct ice_vsi *
-ice_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi,
-	      enum ice_vsi_type vsi_type, struct ice_vf *vf,
-	      struct ice_channel *ch)
+ice_vsi_setup(struct ice_pf *pf, struct ice_vsi_cfg_params *params)
 {
 	struct device *dev = ice_pf_to_dev(pf);
 	struct ice_vsi *vsi;
 	int ret;
 
-	vsi = ice_vsi_alloc(pf, pi, vsi_type, ch, vf);
+	/* ice_vsi_setup can only initialize a new VSI, and we must have
+	 * a port_info structure for it.
+	 */
+	if (WARN_ON(!(params->flags & ICE_VSI_FLAG_INIT)) ||
+	    WARN_ON(!params->pi))
+		return NULL;
+
+	vsi = ice_vsi_alloc(pf, params);
 	if (!vsi) {
 		dev_err(dev, "could not allocate VSI\n");
 		return NULL;
 	}
 
-	ret = ice_vsi_cfg(vsi, vf, ch, ICE_VSI_FLAG_INIT);
+	ret = ice_vsi_cfg(vsi, params);
 	if (ret)
 		goto err_vsi_cfg;
 
@@ -2992,7 +2987,7 @@ ice_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi,
 	return vsi;
 
 err_vsi_cfg:
-	if (vsi_type == ICE_VSI_VF)
+	if (params->type == ICE_VSI_VF)
 		ice_enable_lag(pf->lag);
 	ice_vsi_free(vsi);
 
@@ -3472,12 +3467,16 @@ ice_vsi_realloc_stat_arrays(struct ice_vsi *vsi, int prev_txq, int prev_rxq)
 /**
  * ice_vsi_rebuild - Rebuild VSI after reset
  * @vsi: VSI to be rebuild
- * @init_vsi: flag, tell if VSI need to be initialized
+ * @vsi_flags: flags used for VSI rebuild flow
+ *
+ * Set vsi_flags to ICE_VSI_FLAG_INIT to initialize a new VSI, or
+ * ICE_VSI_FLAG_NO_INIT to rebuild an existing VSI in hardware.
  *
  * Returns 0 on success and negative value on failure
  */
-int ice_vsi_rebuild(struct ice_vsi *vsi, int init_vsi)
+int ice_vsi_rebuild(struct ice_vsi *vsi, u32 vsi_flags)
 {
+	struct ice_vsi_cfg_params params = {};
 	struct ice_coalesce_stored *coalesce;
 	int ret, prev_txq, prev_rxq;
 	int prev_num_q_vectors = 0;
@@ -3486,6 +3485,9 @@ int ice_vsi_rebuild(struct ice_vsi *vsi, int init_vsi)
 	if (!vsi)
 		return -EINVAL;
 
+	params = ice_vsi_to_params(vsi);
+	params.flags = vsi_flags;
+
 	pf = vsi->back;
 	if (WARN_ON(vsi->type == ICE_VSI_VF && !vsi->vf))
 		return -EINVAL;
@@ -3501,13 +3503,13 @@ int ice_vsi_rebuild(struct ice_vsi *vsi, int init_vsi)
 	prev_rxq = vsi->num_rxq;
 
 	ice_vsi_decfg(vsi);
-	ret = ice_vsi_cfg_def(vsi, vsi->ch, init_vsi);
+	ret = ice_vsi_cfg_def(vsi, &params);
 	if (ret)
 		goto err_vsi_cfg;
 
 	ret = ice_vsi_cfg_tc_lan(pf, vsi);
 	if (ret) {
-		if (init_vsi & ICE_VSI_FLAG_INIT) {
+		if (vsi_flags & ICE_VSI_FLAG_INIT) {
 			ret = -EIO;
 			goto err_vsi_cfg_tc_lan;
 		} else {