[dpdk-dev] [PATCH v4 05/27] event/dlb2: add v2.5 get resources

[Timothy McDaniel <timothy.mcdaniel@intel.com>]

DLB v2.5 uses a new credit scheme, where directed and load balanced
credits are unified, instead of having separate directed and load
balanced credit pools.

Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
---
 drivers/event/dlb2/dlb2.c                     | 20 ++++--
 drivers/event/dlb2/dlb2_user.h                | 14 +++-
 drivers/event/dlb2/pf/base/dlb2_resource.c    | 48 --------------
 .../event/dlb2/pf/base/dlb2_resource_new.c    | 66 +++++++++++++++++++
 4 files changed, 92 insertions(+), 56 deletions(-)

diff --git a/drivers/event/dlb2/dlb2.c b/drivers/event/dlb2/dlb2.c
index 7f5b9141b..0048f6a1b 100644
--- a/drivers/event/dlb2/dlb2.c
+++ b/drivers/event/dlb2/dlb2.c
@@ -132,17 +132,25 @@ dlb2_hw_query_resources(struct dlb2_eventdev *dlb2)
 	evdev_dlb2_default_info.max_event_ports =
 		dlb2->hw_rsrc_query_results.num_ldb_ports;
 
-	evdev_dlb2_default_info.max_num_events =
-		dlb2->hw_rsrc_query_results.num_ldb_credits;
-
+	if (dlb2->version == DLB2_HW_V2_5) {
+		evdev_dlb2_default_info.max_num_events =
+			dlb2->hw_rsrc_query_results.num_credits;
+	} else {
+		evdev_dlb2_default_info.max_num_events =
+			dlb2->hw_rsrc_query_results.num_ldb_credits;
+	}
 	/* Save off values used when creating the scheduling domain. */
 
 	handle->info.num_sched_domains =
 		dlb2->hw_rsrc_query_results.num_sched_domains;
 
-	handle->info.hw_rsrc_max.nb_events_limit =
-		dlb2->hw_rsrc_query_results.num_ldb_credits;
-
+	if (dlb2->version == DLB2_HW_V2_5) {
+		handle->info.hw_rsrc_max.nb_events_limit =
+			dlb2->hw_rsrc_query_results.num_credits;
+	} else {
+		handle->info.hw_rsrc_max.nb_events_limit =
+			dlb2->hw_rsrc_query_results.num_ldb_credits;
+	}
 	handle->info.hw_rsrc_max.num_queues =
 		dlb2->hw_rsrc_query_results.num_ldb_queues +
 		dlb2->hw_rsrc_query_results.num_dir_ports;
diff --git a/drivers/event/dlb2/dlb2_user.h b/drivers/event/dlb2/dlb2_user.h
index f4bda7822..b7d125dec 100644
--- a/drivers/event/dlb2/dlb2_user.h
+++ b/drivers/event/dlb2/dlb2_user.h
@@ -195,9 +195,12 @@ struct dlb2_create_sched_domain_args {
  *	contiguous range of history list entries.
  * - num_ldb_credits: Amount of available load-balanced QE storage.
  * - num_dir_credits: Amount of available directed QE storage.
+ * - response.status: Detailed error code. In certain cases, such as if the
+ *	ioctl request arg is invalid, the driver won't set status.
  */
 struct dlb2_get_num_resources_args {
 	/* Output parameters */
+	struct dlb2_cmd_response response;
 	__u32 num_sched_domains;
 	__u32 num_ldb_queues;
 	__u32 num_ldb_ports;
@@ -206,8 +209,15 @@ struct dlb2_get_num_resources_args {
 	__u32 num_atomic_inflights;
 	__u32 num_hist_list_entries;
 	__u32 max_contiguous_hist_list_entries;
-	__u32 num_ldb_credits;
-	__u32 num_dir_credits;
+	union {
+		struct {
+			__u32 num_ldb_credits;
+			__u32 num_dir_credits;
+		};
+		struct {
+			__u32 num_credits;
+		};
+	};
 };
 
 /*
diff --git a/drivers/event/dlb2/pf/base/dlb2_resource.c b/drivers/event/dlb2/pf/base/dlb2_resource.c
index 7ba6521ef..eda983d85 100644
--- a/drivers/event/dlb2/pf/base/dlb2_resource.c
+++ b/drivers/event/dlb2/pf/base/dlb2_resource.c
@@ -58,54 +58,6 @@ void dlb2_hw_enable_sparse_dir_cq_mode(struct dlb2_hw *hw)
 	DLB2_CSR_WR(hw, DLB2_CHP_CFG_CHP_CSR_CTRL, r0.val);
 }
 
-int dlb2_hw_get_num_resources(struct dlb2_hw *hw,
-			      struct dlb2_get_num_resources_args *arg,
-			      bool vdev_req,
-			      unsigned int vdev_id)
-{
-	struct dlb2_function_resources *rsrcs;
-	struct dlb2_bitmap *map;
-	int i;
-
-	if (vdev_req && vdev_id >= DLB2_MAX_NUM_VDEVS)
-		return -EINVAL;
-
-	if (vdev_req)
-		rsrcs = &hw->vdev[vdev_id];
-	else
-		rsrcs = &hw->pf;
-
-	arg->num_sched_domains = rsrcs->num_avail_domains;
-
-	arg->num_ldb_queues = rsrcs->num_avail_ldb_queues;
-
-	arg->num_ldb_ports = 0;
-	for (i = 0; i < DLB2_NUM_COS_DOMAINS; i++)
-		arg->num_ldb_ports += rsrcs->num_avail_ldb_ports[i];
-
-	arg->num_cos_ldb_ports[0] = rsrcs->num_avail_ldb_ports[0];
-	arg->num_cos_ldb_ports[1] = rsrcs->num_avail_ldb_ports[1];
-	arg->num_cos_ldb_ports[2] = rsrcs->num_avail_ldb_ports[2];
-	arg->num_cos_ldb_ports[3] = rsrcs->num_avail_ldb_ports[3];
-
-	arg->num_dir_ports = rsrcs->num_avail_dir_pq_pairs;
-
-	arg->num_atomic_inflights = rsrcs->num_avail_aqed_entries;
-
-	map = rsrcs->avail_hist_list_entries;
-
-	arg->num_hist_list_entries = dlb2_bitmap_count(map);
-
-	arg->max_contiguous_hist_list_entries =
-		dlb2_bitmap_longest_set_range(map);
-
-	arg->num_ldb_credits = rsrcs->num_avail_qed_entries;
-
-	arg->num_dir_credits = rsrcs->num_avail_dqed_entries;
-
-	return 0;
-}
-
 void dlb2_hw_enable_sparse_ldb_cq_mode(struct dlb2_hw *hw)
 {
 	union dlb2_chp_cfg_chp_csr_ctrl r0;
diff --git a/drivers/event/dlb2/pf/base/dlb2_resource_new.c b/drivers/event/dlb2/pf/base/dlb2_resource_new.c
index 175b0799e..14b97dbf9 100644
--- a/drivers/event/dlb2/pf/base/dlb2_resource_new.c
+++ b/drivers/event/dlb2/pf/base/dlb2_resource_new.c
@@ -257,3 +257,69 @@ void dlb2_clr_pmcsr_disable(struct dlb2_hw *hw, enum dlb2_hw_ver ver)
 	DLB2_CSR_WR(hw, DLB2_CM_CFG_PM_PMCSR_DISABLE(ver), pmcsr_dis);
 }
 
+/**
+ * dlb2_hw_get_num_resources() - query the PCI function's available resources
+ * @hw: dlb2_hw handle for a particular device.
+ * @arg: pointer to resource counts.
+ * @vdev_req: indicates whether this request came from a vdev.
+ * @vdev_id: If vdev_req is true, this contains the vdev's ID.
+ *
+ * This function returns the number of available resources for the PF or for a
+ * VF.
+ *
+ * A vdev can be either an SR-IOV virtual function or a Scalable IOV virtual
+ * device.
+ *
+ * Return:
+ * Returns 0 upon success, -EINVAL if vdev_req is true and vdev_id is
+ * invalid.
+ */
+int dlb2_hw_get_num_resources(struct dlb2_hw *hw,
+			      struct dlb2_get_num_resources_args *arg,
+			      bool vdev_req,
+			      unsigned int vdev_id)
+{
+	struct dlb2_function_resources *rsrcs;
+	struct dlb2_bitmap *map;
+	int i;
+
+	if (vdev_req && vdev_id >= DLB2_MAX_NUM_VDEVS)
+		return -EINVAL;
+
+	if (vdev_req)
+		rsrcs = &hw->vdev[vdev_id];
+	else
+		rsrcs = &hw->pf;
+
+	arg->num_sched_domains = rsrcs->num_avail_domains;
+
+	arg->num_ldb_queues = rsrcs->num_avail_ldb_queues;
+
+	arg->num_ldb_ports = 0;
+	for (i = 0; i < DLB2_NUM_COS_DOMAINS; i++)
+		arg->num_ldb_ports += rsrcs->num_avail_ldb_ports[i];
+
+	arg->num_cos_ldb_ports[0] = rsrcs->num_avail_ldb_ports[0];
+	arg->num_cos_ldb_ports[1] = rsrcs->num_avail_ldb_ports[1];
+	arg->num_cos_ldb_ports[2] = rsrcs->num_avail_ldb_ports[2];
+	arg->num_cos_ldb_ports[3] = rsrcs->num_avail_ldb_ports[3];
+
+	arg->num_dir_ports = rsrcs->num_avail_dir_pq_pairs;
+
+	arg->num_atomic_inflights = rsrcs->num_avail_aqed_entries;
+
+	map = rsrcs->avail_hist_list_entries;
+
+	arg->num_hist_list_entries = dlb2_bitmap_count(map);
+
+	arg->max_contiguous_hist_list_entries =
+		dlb2_bitmap_longest_set_range(map);
+
+	if (hw->ver == DLB2_HW_V2) {
+		arg->num_ldb_credits = rsrcs->num_avail_qed_entries;
+		arg->num_dir_credits = rsrcs->num_avail_dqed_entries;
+	} else {
+		arg->num_credits = rsrcs->num_avail_entries;
+	}
+	return 0;
+}
-- 
2.23.0