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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
Subject: [PATCH v5 5/7] bnxt_en: Use auxiliary bus calls over proprietary calls
Date:   Wed,  7 Dec 2022 09:53:08 -0800
Message-Id: <20221207175310.23656-6-ajit.khaparde@broadcom.com>
In-Reply-To: <20221207175310.23656-1-ajit.khaparde@broadcom.com>
References: <20221207175310.23656-1-ajit.khaparde@broadcom.com>
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--000000000000f1622c05ef4098df
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Wherever possible use the function ops provided by auxiliary bus
instead of using proprietary ops.

Defined bnxt_re_suspend and bnxt_re_resume calls which can be
invoked by the bnxt_en driver instead of the ULP stop/start calls.

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
---
 drivers/infiniband/hw/bnxt_re/main.c          | 102 +++++++++++-------
 drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c |  40 ++++---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h |   2 -
 3 files changed, 87 insertions(+), 57 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index e1777c8e6d5e..ae04198c33b7 100644
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -226,45 +226,6 @@ static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
 		bnxt_re_limit_vf_res(&rdev->qplib_ctx, num_vfs);
 }
 
-/* for handling bnxt_en callbacks later */
-static void bnxt_re_stop(void *p)
-{
-	struct bnxt_re_dev *rdev = p;
-	struct bnxt *bp;
-
-	if (!rdev)
-		return;
-
-	/* L2 driver invokes this callback during device error/crash or device
-	 * reset. Current RoCE driver doesn't recover the device in case of
-	 * error. Handle the error by dispatching fatal events to all qps
-	 * ie. by calling bnxt_re_dev_stop and release the MSIx vectors as
-	 * L2 driver want to modify the MSIx table.
-	 */
-	bp = netdev_priv(rdev->netdev);
-
-	ibdev_info(&rdev->ibdev, "Handle device stop call from L2 driver");
-	/* Check the current device state from L2 structure and move the
-	 * device to detached state if FW_FATAL_COND is set.
-	 * This prevents more commands to HW during clean-up,
-	 * in case the device is already in error.
-	 */
-	if (test_bit(BNXT_STATE_FW_FATAL_COND, &bp->state))
-		set_bit(ERR_DEVICE_DETACHED, &rdev->rcfw.cmdq.flags);
-
-	bnxt_re_dev_stop(rdev);
-	bnxt_re_stop_irq(rdev);
-	/* Move the device states to detached and  avoid sending any more
-	 * commands to HW
-	 */
-	set_bit(BNXT_RE_FLAG_ERR_DEVICE_DETACHED, &rdev->flags);
-	set_bit(ERR_DEVICE_DETACHED, &rdev->rcfw.cmdq.flags);
-}
-
-static void bnxt_re_start(void *p)
-{
-}
-
 static void bnxt_re_sriov_config(void *p, int num_vfs)
 {
 	struct bnxt_re_dev *rdev = p;
@@ -341,8 +302,6 @@ static void bnxt_re_start_irq(void *handle, struct bnxt_msix_entry *ent)
 }
 
 static struct bnxt_ulp_ops bnxt_re_ulp_ops = {
-	.ulp_stop = bnxt_re_stop,
-	.ulp_start = bnxt_re_start,
 	.ulp_sriov_config = bnxt_re_sriov_config,
 	.ulp_irq_stop = bnxt_re_stop_irq,
 	.ulp_irq_restart = bnxt_re_start_irq
@@ -1585,6 +1544,65 @@ static int bnxt_re_probe(struct auxiliary_device *adev,
 	return rc;
 }
 
+static int bnxt_re_suspend(struct auxiliary_device *adev, pm_message_t state)
+{
+	struct bnxt_re_dev *rdev = auxiliary_get_drvdata(adev);
+	struct bnxt *bp;
+
+	if (!rdev)
+		return 0;
+
+	mutex_lock(&bnxt_re_mutex);
+	/* L2 driver may invoke this callback during device error/crash or device
+	 * reset. Current RoCE driver doesn't recover the device in case of
+	 * error. Handle the error by dispatching fatal events to all qps
+	 * ie. by calling bnxt_re_dev_stop and release the MSIx vectors as
+	 * L2 driver want to modify the MSIx table.
+	 */
+	bp = netdev_priv(rdev->netdev);
+
+	ibdev_info(&rdev->ibdev, "Handle device suspend call");
+	/* Check the current device state from L2 structure and move the
+	 * device to detached state if FW_FATAL_COND is set.
+	 * This prevents more commands to HW during clean-up,
+	 * in case the device is already in error.
+	 */
+	if (test_bit(BNXT_STATE_FW_FATAL_COND, &bp->state))
+		set_bit(ERR_DEVICE_DETACHED, &rdev->rcfw.cmdq.flags);
+
+	bnxt_re_dev_stop(rdev);
+	bnxt_re_stop_irq(rdev);
+	/* Move the device states to detached and  avoid sending any more
+	 * commands to HW
+	 */
+	set_bit(BNXT_RE_FLAG_ERR_DEVICE_DETACHED, &rdev->flags);
+	set_bit(ERR_DEVICE_DETACHED, &rdev->rcfw.cmdq.flags);
+	mutex_unlock(&bnxt_re_mutex);
+
+	return 0;
+}
+
+static int bnxt_re_resume(struct auxiliary_device *adev)
+{
+	struct bnxt_re_dev *rdev = auxiliary_get_drvdata(adev);
+
+	if (!rdev)
+		return 0;
+
+	mutex_lock(&bnxt_re_mutex);
+	/* L2 driver may invoke this callback during device recovery, resume.
+	 * reset. Current RoCE driver doesn't recover the device in case of
+	 * error. Handle the error by dispatching fatal events to all qps
+	 * ie. by calling bnxt_re_dev_stop and release the MSIx vectors as
+	 * L2 driver want to modify the MSIx table.
+	 */
+
+	ibdev_info(&rdev->ibdev, "Handle device resume call");
+	mutex_unlock(&bnxt_re_mutex);
+
+	return 0;
+}
+
 static const struct auxiliary_device_id bnxt_re_id_table[] = {
 	{ .name = BNXT_ADEV_NAME ".rdma", },
 	{},
@@ -1597,6 +1615,8 @@ static struct auxiliary_driver bnxt_re_driver = {
 	.probe = bnxt_re_probe,
 	.remove = bnxt_re_remove,
 	.shutdown = bnxt_re_shutdown,
+	.suspend = bnxt_re_suspend,
+	.resume = bnxt_re_resume,
 	.id_table = bnxt_re_id_table,
 };
 
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
index edc4d49502ab..8e11603387dd 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
@@ -272,26 +272,31 @@ static void bnxt_ulp_put(struct bnxt_ulp *ulp)
 
 void bnxt_ulp_stop(struct bnxt *bp)
 {
+	struct bnxt_aux_dev *bnxt_aux = bp->aux_dev;
 	struct bnxt_en_dev *edev = bp->edev;
-	struct bnxt_ulp_ops *ops;
-	struct bnxt_ulp *ulp;
 
 	if (!edev)
 		return;
 
 	edev->flags |= BNXT_EN_FLAG_ULP_STOPPED;
-	ulp = edev->ulp_tbl;
-	ops = rtnl_dereference(ulp->ulp_ops);
-	if (!ops || !ops->ulp_stop)
-		return;
-	ops->ulp_stop(ulp->handle);
+	if (bnxt_aux) {
+		struct auxiliary_device *adev;
+
+		adev = &bnxt_aux->aux_dev;
+		if (adev->dev.driver) {
+			struct auxiliary_driver *adrv;
+			pm_message_t pm = {};
+
+			adrv = to_auxiliary_drv(adev->dev.driver);
+			adrv->suspend(adev, pm);
+		}
+	}
 }
 
 void bnxt_ulp_start(struct bnxt *bp, int err)
 {
+	struct bnxt_aux_dev *bnxt_aux = bp->aux_dev;
 	struct bnxt_en_dev *edev = bp->edev;
-	struct bnxt_ulp_ops *ops;
-	struct bnxt_ulp *ulp;
 
 	if (!edev)
 		return;
@@ -301,11 +306,18 @@ void bnxt_ulp_start(struct bnxt *bp, int err)
 	if (err)
 		return;
 
-	ulp = edev->ulp_tbl;
-	ops = rtnl_dereference(ulp->ulp_ops);
-	if (!ops || !ops->ulp_start)
-		return;
-	ops->ulp_start(ulp->handle);
+	if (bnxt_aux) {
+		struct auxiliary_device *adev;
+
+		adev = &bnxt_aux->aux_dev;
+		if (adev->dev.driver) {
+			struct auxiliary_driver *adrv;
+
+			adrv = to_auxiliary_drv(adev->dev.driver);
+			adrv->resume(adev);
+		}
+	}
+
 }
 
 void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
index b16dbf217dcd..526afd1e06b2 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
@@ -29,8 +29,6 @@ struct bnxt_msix_entry {
 struct bnxt_ulp_ops {
 	/* async_notifier() cannot sleep (in BH context) */
 	void (*ulp_async_notifier)(void *, struct hwrm_async_event_cmpl *);
-	void (*ulp_stop)(void *);
-	void (*ulp_start)(void *);
 	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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