From:   Ajit Khaparde <ajit.khaparde@broadcom.com>
To:     ajit.khaparde@broadcom.com
Cc:     andrew.gospodarek@broadcom.com, davem@davemloft.net,
        edumazet@google.com, jgg@ziepe.ca, kuba@kernel.org,
        leon@kernel.org, linux-kernel@vger.kernel.org,
        linux-rdma@vger.kernel.org, michael.chan@broadcom.com,
        netdev@vger.kernel.org, pabeni@redhat.com,
        selvin.xavier@broadcom.com, gregkh@linuxfoundation.org,
        Leon Romanovsky <leonro@nvidia.com>
Subject: [PATCH net-next v10 7/8] RDMA/bnxt_re: Remove the sriov config callback
Date:   Wed,  1 Feb 2023 12:44:59 -0800
Message-Id: <20230201204500.19420-8-ajit.khaparde@broadcom.com>
In-Reply-To: <20230201204500.19420-1-ajit.khaparde@broadcom.com>
References: <20230201204500.19420-1-ajit.khaparde@broadcom.com>
MIME-Version: 1.0
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--000000000000ab9e0e05f3a986d0
Content-Transfer-Encoding: 8bit

Remove the SRIOV config callback which the bnxt_en was calling
to reconfigure the chip resources for a PF device when VFs are
created. The code is now modified to provision the VF resources
based on the total VF count instead of the actual VF count.
This allows the SRIOV config callback to be removed from the
list of ulp_ops.

Suggested-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
---
 drivers/infiniband/hw/bnxt_re/main.c          | 11 ++++---
 .../net/ethernet/broadcom/bnxt/bnxt_sriov.c   |  7 +----
 drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c | 29 -------------------
 drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h |  1 -
 4 files changed, 8 insertions(+), 40 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index ed7ac6acaaff..60df6809bc60 100644
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -221,13 +221,12 @@ static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
 		bnxt_re_limit_vf_res(&rdev->qplib_ctx, num_vfs);
 }
 
-static void bnxt_re_sriov_config(void *p, int num_vfs)
+static void bnxt_re_vf_res_config(struct bnxt_re_dev *rdev)
 {
-	struct bnxt_re_dev *rdev = p;
 
 	if (test_bit(BNXT_RE_FLAG_ERR_DEVICE_DETACHED, &rdev->flags))
 		return;
-	rdev->num_vfs = num_vfs;
+	rdev->num_vfs = pci_sriov_get_totalvfs(rdev->en_dev->pdev);
 	if (!bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx)) {
 		bnxt_re_set_resource_limits(rdev);
 		bnxt_qplib_set_func_resources(&rdev->qplib_res, &rdev->rcfw,
@@ -297,7 +296,6 @@ static void bnxt_re_start_irq(void *handle, struct bnxt_msix_entry *ent)
 }
 
 static struct bnxt_ulp_ops bnxt_re_ulp_ops = {
-	.ulp_sriov_config = bnxt_re_sriov_config,
 	.ulp_irq_stop = bnxt_re_stop_irq,
 	.ulp_irq_restart = bnxt_re_start_irq
 };
@@ -1369,6 +1367,11 @@ static int bnxt_re_dev_init(struct bnxt_re_dev *rdev, u8 wqe_mode)
 		INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
 		set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
 		schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
+		/*
+		 * Use the total VF count since the actual VF count may not be
+		 * available at this point.
+		 */
+		bnxt_re_vf_res_config(rdev);
 	}
 
 	return 0;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
index a4cba7cb2783..3ed3a2b3b3a9 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
@@ -749,7 +749,6 @@ int bnxt_cfg_hw_sriov(struct bnxt *bp, int *num_vfs, bool reset)
 		*num_vfs = rc;
 	}
 
-	bnxt_ulp_sriov_cfg(bp, *num_vfs);
 	return 0;
 }
 
@@ -823,10 +822,8 @@ static int bnxt_sriov_enable(struct bnxt *bp, int *num_vfs)
 		goto err_out2;
 
 	rc = pci_enable_sriov(bp->pdev, *num_vfs);
-	if (rc) {
-		bnxt_ulp_sriov_cfg(bp, 0);
+	if (rc)
 		goto err_out2;
-	}
 
 	return 0;
 
@@ -872,8 +869,6 @@ void bnxt_sriov_disable(struct bnxt *bp)
 	rtnl_lock();
 	bnxt_restore_pf_fw_resources(bp);
 	rtnl_unlock();
-
-	bnxt_ulp_sriov_cfg(bp, 0);
 }
 
 int bnxt_sriov_configure(struct pci_dev *pdev, int num_vfs)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
index b6c482d82b2a..3e2a69413d35 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
@@ -259,16 +259,6 @@ int bnxt_send_msg(struct bnxt_en_dev *edev,
 }
 EXPORT_SYMBOL(bnxt_send_msg);
 
-static void bnxt_ulp_get(struct bnxt_ulp *ulp)
-{
-	atomic_inc(&ulp->ref_count);
-}
-
-static void bnxt_ulp_put(struct bnxt_ulp *ulp)
-{
-	atomic_dec(&ulp->ref_count);
-}
-
 void bnxt_ulp_stop(struct bnxt *bp)
 {
 	struct bnxt_aux_priv *aux_priv = bp->aux_priv;
@@ -321,25 +311,6 @@ void bnxt_ulp_start(struct bnxt *bp, int err)
 
 }
 
-void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
-{
-	struct bnxt_en_dev *edev = bp->edev;
-	struct bnxt_ulp_ops *ops;
-	struct bnxt_ulp *ulp;
-
-	if (!edev)
-		return;
-	ulp = edev->ulp_tbl;
-
-	ops = rcu_dereference(ulp->ulp_ops);
-	if (!ops || !ops->ulp_sriov_config)
-		return;
-
-	bnxt_ulp_get(ulp);
-	ops->ulp_sriov_config(ulp->handle, num_vfs);
-	bnxt_ulp_put(ulp);
-}
-
 void bnxt_ulp_irq_stop(struct bnxt *bp)
 {
 	struct bnxt_en_dev *edev = bp->edev;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
index c62986e4cc82..ed2832975912 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
@@ -26,7 +26,6 @@ struct bnxt_msix_entry {
 };
 
 struct bnxt_ulp_ops {
-	void (*ulp_sriov_config)(void *, int);
 	void (*ulp_irq_stop)(void *);
 	void (*ulp_irq_restart)(void *, struct bnxt_msix_entry *);
 };
-- 
2.37.1 (Apple Git-137.1)


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