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Date: Tue, 21 Mar 2023 13:21:34 +0100
From: Piotr Raczynski <piotr.raczynski@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org, michal.swiatkowski@...el.com,
shiraz.saleem@...el.com, jacob.e.keller@...el.com,
sridhar.samudrala@...el.com, jesse.brandeburg@...el.com,
aleksander.lobakin@...el.com, lukasz.czapnik@...el.com,
Piotr Raczynski <piotr.raczynski@...el.com>
Subject: [PATCH net-next v1 4/8] ice: refactor VF control VSI interrupt handling
All VF contrl VSIs share the same interrupt vector. Rurrently, a helper
function dedicated for that directly sets ice_vsi::base_vector.
Use helper that returns pointer to first found VF control VSI instead.
Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>
Signed-off-by: Piotr Raczynski <piotr.raczynski@...el.com>
---
drivers/net/ethernet/intel/ice/ice_lib.c | 76 ++++-----------------
drivers/net/ethernet/intel/ice/ice_vf_lib.c | 33 +++++++++
drivers/net/ethernet/intel/ice/ice_vf_lib.h | 3 +
3 files changed, 49 insertions(+), 63 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 79e1557f77e8..f8c9c2c20e6d 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -1473,36 +1473,6 @@ ice_get_res(struct ice_pf *pf, struct ice_res_tracker *res, u16 needed, u16 id)
return ice_search_res(res, needed, id);
}
-/**
- * ice_get_vf_ctrl_res - Get VF control VSI resource
- * @pf: pointer to the PF structure
- * @vsi: the VSI to allocate a resource for
- *
- * Look up whether another VF has already allocated the control VSI resource.
- * If so, re-use this resource so that we share it among all VFs.
- *
- * Otherwise, allocate the resource and return it.
- */
-static int ice_get_vf_ctrl_res(struct ice_pf *pf, struct ice_vsi *vsi)
-{
- struct ice_vf *vf;
- unsigned int bkt;
- int base;
-
- rcu_read_lock();
- ice_for_each_vf_rcu(pf, bkt, vf) {
- if (vf != vsi->vf && vf->ctrl_vsi_idx != ICE_NO_VSI) {
- base = pf->vsi[vf->ctrl_vsi_idx]->base_vector;
- rcu_read_unlock();
- return base;
- }
- }
- rcu_read_unlock();
-
- return ice_get_res(pf, pf->irq_tracker, vsi->num_q_vectors,
- ICE_RES_VF_CTRL_VEC_ID);
-}
-
/**
* ice_vsi_setup_vector_base - Set up the base vector for the given VSI
* @vsi: ptr to the VSI
@@ -1536,7 +1506,14 @@ static int ice_vsi_setup_vector_base(struct ice_vsi *vsi)
num_q_vectors = vsi->num_q_vectors;
/* reserve slots from OS requested IRQs */
if (vsi->type == ICE_VSI_CTRL && vsi->vf) {
- base = ice_get_vf_ctrl_res(pf, vsi);
+ struct ice_vsi *ctrl_vsi = ice_get_vf_ctrl_vsi(pf, vsi);
+
+ if (ctrl_vsi)
+ base = ctrl_vsi->base_vector;
+ else
+ base = ice_get_res(pf, pf->irq_tracker,
+ vsi->num_q_vectors,
+ ICE_RES_VF_CTRL_VEC_ID);
} else {
base = ice_get_res(pf, pf->irq_tracker, num_q_vectors,
vsi->idx);
@@ -2611,37 +2588,6 @@ static void ice_set_agg_vsi(struct ice_vsi *vsi)
vsi->agg_node->num_vsis);
}
-/**
- * ice_free_vf_ctrl_res - Free the VF control VSI resource
- * @pf: pointer to PF structure
- * @vsi: the VSI to free resources for
- *
- * Check if the VF control VSI resource is still in use. If no VF is using it
- * any more, release the VSI resource. Otherwise, leave it to be cleaned up
- * once no other VF uses it.
- */
-static void ice_free_vf_ctrl_res(struct ice_pf *pf, struct ice_vsi *vsi)
-{
- struct ice_vf *vf;
- unsigned int bkt;
-
- rcu_read_lock();
- ice_for_each_vf_rcu(pf, bkt, vf) {
- if (vf != vsi->vf && vf->ctrl_vsi_idx != ICE_NO_VSI) {
- rcu_read_unlock();
- return;
- }
- }
- rcu_read_unlock();
-
- /* No other VFs left that have control VSI. It is now safe to reclaim
- * SW interrupts back to the common pool.
- */
- ice_free_res(pf->irq_tracker, vsi->base_vector,
- ICE_RES_VF_CTRL_VEC_ID);
- pf->num_avail_sw_msix += vsi->num_q_vectors;
-}
-
static int ice_vsi_cfg_tc_lan(struct ice_pf *pf, struct ice_vsi *vsi)
{
u16 max_txqs[ICE_MAX_TRAFFIC_CLASS] = { 0 };
@@ -2916,7 +2862,11 @@ void ice_vsi_decfg(struct ice_vsi *vsi)
* cleared in the same manner.
*/
if (vsi->type == ICE_VSI_CTRL && vsi->vf) {
- ice_free_vf_ctrl_res(pf, vsi);
+ struct ice_vsi *ctrl_vsi = ice_get_vf_ctrl_vsi(pf, vsi);
+
+ if (!ctrl_vsi)
+ ice_free_res(pf->irq_tracker, vsi->base_vector,
+ ICE_RES_VF_CTRL_VEC_ID);
} else if (vsi->type != ICE_VSI_VF) {
/* reclaim SW interrupts back to the common pool */
ice_free_res(pf->irq_tracker, vsi->base_vector, vsi->idx);
diff --git a/drivers/net/ethernet/intel/ice/ice_vf_lib.c b/drivers/net/ethernet/intel/ice/ice_vf_lib.c
index 89fd6982df09..de5ae6163fd0 100644
--- a/drivers/net/ethernet/intel/ice/ice_vf_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_vf_lib.c
@@ -1310,3 +1310,36 @@ void ice_vf_set_initialized(struct ice_vf *vf)
set_bit(ICE_VF_STATE_INIT, vf->vf_states);
memset(&vf->vlan_v2_caps, 0, sizeof(vf->vlan_v2_caps));
}
+
+/**
+ * ice_get_vf_ctrl_vsi - Get first VF control VSI pointer
+ * @pf: the PF private structure
+ * @vsi: pointer to the VSI
+ *
+ * Return first found VF control VSI other than the vsi
+ * passed by parameter. This function is used to determine
+ * whether new resources have to be allocated for control VSI
+ * or they can be shared with existing one.
+ *
+ * Return found VF control VSI pointer other itself. Return
+ * NULL Otherwise.
+ *
+ */
+struct ice_vsi*
+ice_get_vf_ctrl_vsi(struct ice_pf *pf, struct ice_vsi *vsi)
+{
+ struct ice_vsi *ctrl_vsi = NULL;
+ struct ice_vf *vf;
+ unsigned int bkt;
+
+ rcu_read_lock();
+ ice_for_each_vf_rcu(pf, bkt, vf) {
+ if (vf != vsi->vf && vf->ctrl_vsi_idx != ICE_NO_VSI) {
+ ctrl_vsi = pf->vsi[vf->ctrl_vsi_idx];
+ break;
+ }
+ }
+
+ rcu_read_unlock();
+ return ctrl_vsi;
+}
diff --git a/drivers/net/ethernet/intel/ice/ice_vf_lib.h b/drivers/net/ethernet/intel/ice/ice_vf_lib.h
index e3cda6fb71ab..01a173c36bcc 100644
--- a/drivers/net/ethernet/intel/ice/ice_vf_lib.h
+++ b/drivers/net/ethernet/intel/ice/ice_vf_lib.h
@@ -207,6 +207,9 @@ static inline u16 ice_vf_get_port_vlan_tpid(struct ice_vf *vf)
#define ice_for_each_vf_rcu(pf, bkt, vf) \
hash_for_each_rcu((pf)->vfs.table, (bkt), (vf), entry)
+struct ice_vsi *
+ice_get_vf_ctrl_vsi(struct ice_pf *pf, struct ice_vsi *vsi);
+
#ifdef CONFIG_PCI_IOV
struct ice_vf *ice_get_vf_by_id(struct ice_pf *pf, u16 vf_id);
void ice_put_vf(struct ice_vf *vf);
--
2.38.1
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