[Intel-wired-lan] [PATCH net] i40e: Fix logic of disabling queues
Arkadiusz Kubalewski
arkadiusz.kubalewski at intel.com
Thu Apr 29 17:49:47 UTC 2021
Correct the message flow between driver and firmware when disabling
queues.
Previously in case of PF reset (due to required reinit after reconfig),
the error like: "VSI seid 397 Tx ring 60 disable timeout" could show up
occasionally. The error was not a real issue of hardware or firmware,
it was caused by wrong sequence of messages invoked by the driver.
Fixes: 41c445ff0f48 ("i40e: main driver core")
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov at intel.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski at intel.com>
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 58 ++++++++++++---------
1 file changed, 34 insertions(+), 24 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index c34a4b3..9a2c56b 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -4458,11 +4458,10 @@ int i40e_control_wait_tx_q(int seid, struct i40e_pf *pf, int pf_q,
}
/**
- * i40e_vsi_control_tx - Start or stop a VSI's rings
+ * i40e_vsi_enable_tx - Start a VSI's rings
* @vsi: the VSI being configured
- * @enable: start or stop the rings
**/
-static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
+static int i40e_vsi_enable_tx(struct i40e_vsi *vsi)
{
struct i40e_pf *pf = vsi->back;
int i, pf_q, ret = 0;
@@ -4471,7 +4470,7 @@ static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
ret = i40e_control_wait_tx_q(vsi->seid, pf,
pf_q,
- false /*is xdp*/, enable);
+ false /*is xdp*/, true);
if (ret)
break;
@@ -4480,7 +4479,7 @@ static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
ret = i40e_control_wait_tx_q(vsi->seid, pf,
pf_q + vsi->alloc_queue_pairs,
- true /*is xdp*/, enable);
+ true /*is xdp*/, true);
if (ret)
break;
}
@@ -4578,32 +4577,25 @@ int i40e_control_wait_rx_q(struct i40e_pf *pf, int pf_q, bool enable)
}
/**
- * i40e_vsi_control_rx - Start or stop a VSI's rings
+ * i40e_vsi_enable_rx - Start a VSI's rings
* @vsi: the VSI being configured
- * @enable: start or stop the rings
**/
-static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
+static int i40e_vsi_enable_rx(struct i40e_vsi *vsi)
{
struct i40e_pf *pf = vsi->back;
int i, pf_q, ret = 0;
pf_q = vsi->base_queue;
for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
- ret = i40e_control_wait_rx_q(pf, pf_q, enable);
+ ret = i40e_control_wait_rx_q(pf, pf_q, true);
if (ret) {
dev_info(&pf->pdev->dev,
- "VSI seid %d Rx ring %d %sable timeout\n",
- vsi->seid, pf_q, (enable ? "en" : "dis"));
+ "VSI seid %d Rx ring %d enable timeout\n",
+ vsi->seid, pf_q);
break;
}
}
- /* Due to HW errata, on Rx disable only, the register can indicate done
- * before it really is. Needs 50ms to be sure
- */
- if (!enable)
- mdelay(50);
-
return ret;
}
@@ -4616,29 +4608,47 @@ int i40e_vsi_start_rings(struct i40e_vsi *vsi)
int ret = 0;
/* do rx first for enable and last for disable */
- ret = i40e_vsi_control_rx(vsi, true);
+ ret = i40e_vsi_enable_rx(vsi);
if (ret)
return ret;
- ret = i40e_vsi_control_tx(vsi, true);
+ ret = i40e_vsi_enable_tx(vsi);
return ret;
}
+#define I40E_DISABLE_TX_GAP_MSEC 50
+
/**
* i40e_vsi_stop_rings - Stop a VSI's rings
* @vsi: the VSI being configured
**/
void i40e_vsi_stop_rings(struct i40e_vsi *vsi)
{
+ struct i40e_pf *pf = vsi->back;
+ int pf_q, err, q_end;
+
/* When port TX is suspended, don't wait */
if (test_bit(__I40E_PORT_SUSPENDED, vsi->back->state))
return i40e_vsi_stop_rings_no_wait(vsi);
- /* do rx first for enable and last for disable
- * Ignore return value, we need to shutdown whatever we can
- */
- i40e_vsi_control_tx(vsi, false);
- i40e_vsi_control_rx(vsi, false);
+ q_end = vsi->base_queue + vsi->num_queue_pairs;
+ for (pf_q = vsi->base_queue; pf_q < q_end; pf_q++)
+ i40e_pre_tx_queue_cfg(&pf->hw, (u32)pf_q, false);
+
+ for (pf_q = vsi->base_queue; pf_q < q_end; pf_q++) {
+ err = i40e_control_wait_rx_q(pf, pf_q, false);
+ if (err)
+ dev_info(&pf->pdev->dev,
+ "VSI seid %d Rx ring %d dissable timeout\n",
+ vsi->seid, pf_q);
+ }
+
+ msleep(I40E_DISABLE_TX_GAP_MSEC);
+ pf_q = vsi->base_queue;
+ for (pf_q = vsi->base_queue; pf_q < q_end; pf_q++)
+ wr32(&pf->hw, I40E_QTX_ENA(pf_q), 0);
+
+ i40e_vsi_wait_queues_disabled(vsi);
}
/**
base-commit: 776a417daec6a28fdf89426ea98126f8a03c79a1
--
2.26.0
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