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i40e: Helper routine for Rx/Tx queue enable/disable wait 

Introduce helper routines that would wait for the Rx/Tx queue
to reach the enable or disable state as requested.

Change-ID: I518d9d0e2afef3f45107af3b46e9af402ff587c3
Signed-off-by: Neerav Parikh <neerav.parikh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Neerav Parikh 2014-06-03 23:50:15 +00:00 committed by Jeff Kirsher
parent 70114ec4aa
commit 23527308d6
2 changed files with 75 additions and 26 deletions
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1
drivers/net/ethernet/intel/i40e/i40e.h
View File

@ -84,6 +84,7 @@
#define I40E_AQ_WORK_LIMIT 16
#define I40E_MAX_USER_PRIORITY 8
#define I40E_DEFAULT_MSG_ENABLE 4
#define I40E_QUEUE_WAIT_RETRY_LIMIT 10
#define I40E_NVM_VERSION_LO_SHIFT 0
#define I40E_NVM_VERSION_LO_MASK (0xff << I40E_NVM_VERSION_LO_SHIFT)

100
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -3231,6 +3231,35 @@ static void i40e_netpoll(struct net_device *netdev)
}
#endif
/**
* i40e_pf_txq_wait - Wait for a PF's Tx queue to be enabled or disabled
* @pf: the PF being configured
* @pf_q: the PF queue
* @enable: enable or disable state of the queue
*
* This routine will wait for the given Tx queue of the PF to reach the
* enabled or disabled state.
* Returns -ETIMEDOUT in case of failing to reach the requested state after
* multiple retries; else will return 0 in case of success.
**/
static int i40e_pf_txq_wait(struct i40e_pf *pf, int pf_q, bool enable)
{
int i;
u32 tx_reg;
for (i = 0; i < I40E_QUEUE_WAIT_RETRY_LIMIT; i++) {
tx_reg = rd32(&pf->hw, I40E_QTX_ENA(pf_q));
if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
break;
udelay(10);
}
if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
return -ETIMEDOUT;
return 0;
}
/**
* i40e_vsi_control_tx - Start or stop a VSI's rings
* @vsi: the VSI being configured
@ -3240,7 +3269,7 @@ static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
{
struct i40e_pf *pf = vsi->back;
struct i40e_hw *hw = &pf->hw;
int i, j, pf_q;
int i, j, pf_q, ret = 0;
u32 tx_reg;
pf_q = vsi->base_queue;
@ -3273,22 +3302,46 @@ static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
/* wait for the change to finish */
for (j = 0; j < 10; j++) {
tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
break;
udelay(10);
}
if (j >= 10) {
dev_info(&pf->pdev->dev, "Tx ring %d %sable timeout\n",
pf_q, (enable ? "en" : "dis"));
return -ETIMEDOUT;
ret = i40e_pf_txq_wait(pf, pf_q, enable);
if (ret) {
dev_info(&pf->pdev->dev,
"%s: VSI seid %d Tx ring %d %sable timeout\n",
__func__, vsi->seid, pf_q,
(enable ? "en" : "dis"));
break;
}
}
if (hw->revision_id == 0)
mdelay(50);
return ret;
}
/**
* i40e_pf_rxq_wait - Wait for a PF's Rx queue to be enabled or disabled
* @pf: the PF being configured
* @pf_q: the PF queue
* @enable: enable or disable state of the queue
*
* This routine will wait for the given Rx queue of the PF to reach the
* enabled or disabled state.
* Returns -ETIMEDOUT in case of failing to reach the requested state after
* multiple retries; else will return 0 in case of success.
**/
static int i40e_pf_rxq_wait(struct i40e_pf *pf, int pf_q, bool enable)
{
int i;
u32 rx_reg;
for (i = 0; i < I40E_QUEUE_WAIT_RETRY_LIMIT; i++) {
rx_reg = rd32(&pf->hw, I40E_QRX_ENA(pf_q));
if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
break;
udelay(10);
}
if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
return -ETIMEDOUT;
return 0;
}
@ -3302,7 +3355,7 @@ static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
{
struct i40e_pf *pf = vsi->back;
struct i40e_hw *hw = &pf->hw;
int i, j, pf_q;
int i, j, pf_q, ret = 0;
u32 rx_reg;
pf_q = vsi->base_queue;
@ -3327,22 +3380,17 @@ static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
wr32(hw, I40E_QRX_ENA(pf_q), rx_reg);
/* wait for the change to finish */
for (j = 0; j < 10; j++) {
rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
break;
udelay(10);
}
if (j >= 10) {
dev_info(&pf->pdev->dev, "Rx ring %d %sable timeout\n",
pf_q, (enable ? "en" : "dis"));
return -ETIMEDOUT;
ret = i40e_pf_rxq_wait(pf, pf_q, enable);
if (ret) {
dev_info(&pf->pdev->dev,
"%s: VSI seid %d Rx ring %d %sable timeout\n",
__func__, vsi->seid, pf_q,
(enable ? "en" : "dis"));
break;
}
}
return 0;
return ret;
}
/**