[PATCH v2 5/6] bnxt_en: Use auxiliary bus calls over proprietary calls

Ajit Khaparde
2022-10-25T17:31:54Z

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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>
---
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 67872e9bfd63..1266cfe7ea88 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;
@@ -344,8 +305,6 @@ 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
@@ -1623,6 +1582,65 @@ static int bnxt_re_probe(struct auxiliary_device *adev,
return rc;
}

+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;
+}
+
+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", },
{},
@@ -1635,6 +1653,8 @@ 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 dbb1fa086013..ba0c281c74ba 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
@@ -270,26 +270,31 @@ 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;
@@ -299,11 +304,18 @@ 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 42e324635e6b..ba253ba5aba0 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_shutdown)(void *);
void (*ulp_irq_stop)(void *);
--
2.37.0 (Apple Git-136)