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ice: Reduce wait times during VF bringup/reset

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Currently there are a couple places where the VF is waiting too long when
checking the status of registers. This is causing the AVF driver to
spin for longer than necessary in the __IAVF_STARTUP state. Sometimes
it causes the AVF to go into the __IAVF_COMM_FAILED, which may retrigger
the __IAVF_STARTUP state. Try to reduce the chance of this happening by
removing unnecessary wait times in VF bringup/resets.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Brett Creeley 2019-07-25 01:55:37 -07:00 committed by Jeff Kirsher
parent 1337175dec
commit 60d628ea27
2 changed files with 19 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
View File

@ -382,12 +382,15 @@ static void ice_trigger_vf_reset(struct ice_vf *vf, bool is_vflr)
wr32(hw, PF_PCI_CIAA,
VF_DEVICE_STATUS | (vf_abs_id << PF_PCI_CIAA_VF_NUM_S));
for (i = 0; i < 100; i++) {
for (i = 0; i < ICE_PCI_CIAD_WAIT_COUNT; i++) {
reg = rd32(hw, PF_PCI_CIAD);
if ((reg & VF_TRANS_PENDING_M) != 0)
dev_err(&pf->pdev->dev,
"VF %d PCI transactions stuck\n", vf->vf_id);
udelay(1);
/* no transactions pending so stop polling */
if ((reg & VF_TRANS_PENDING_M) == 0)
break;
dev_err(&pf->pdev->dev,
"VF %d PCI transactions stuck\n", vf->vf_id);
udelay(ICE_PCI_CIAD_WAIT_DELAY_US);
}
}
@ -1068,7 +1071,6 @@ bool ice_reset_all_vfs(struct ice_pf *pf, bool is_vflr)
* finished resetting.
*/
for (i = 0, v = 0; i < 10 && v < pf->num_alloc_vfs; i++) {
usleep_range(10000, 20000);
/* Check each VF in sequence */
while (v < pf->num_alloc_vfs) {
@ -1076,8 +1078,11 @@ bool ice_reset_all_vfs(struct ice_pf *pf, bool is_vflr)
vf = &pf->vf[v];
reg = rd32(hw, VPGEN_VFRSTAT(vf->vf_id));
if (!(reg & VPGEN_VFRSTAT_VFRD_M))
if (!(reg & VPGEN_VFRSTAT_VFRD_M)) {
/* only delay if the check failed */
usleep_range(10, 20);
break;
}
/* If the current VF has finished resetting, move on
* to the next VF in sequence.
@ -1091,7 +1096,6 @@ bool ice_reset_all_vfs(struct ice_pf *pf, bool is_vflr)
*/
if (v < pf->num_alloc_vfs)
dev_warn(&pf->pdev->dev, "VF reset check timeout\n");
usleep_range(10000, 20000);
/* free VF resources to begin resetting the VSI state */
for (v = 0; v < pf->num_alloc_vfs; v++) {
@ -1165,12 +1169,14 @@ static bool ice_reset_vf(struct ice_vf *vf, bool is_vflr)
* poll the status register to make sure that the reset
* completed successfully.
*/
usleep_range(10000, 20000);
reg = rd32(hw, VPGEN_VFRSTAT(vf->vf_id));
if (reg & VPGEN_VFRSTAT_VFRD_M) {
rsd = true;
break;
}
/* only sleep if the reset is not done */
usleep_range(10, 20);
}
/* Display a warning if VF didn't manage to reset in time, but need to
@ -1180,8 +1186,6 @@ static bool ice_reset_vf(struct ice_vf *vf, bool is_vflr)
dev_warn(&pf->pdev->dev, "VF reset check timeout on VF %d\n",
vf->vf_id);
usleep_range(10000, 20000);
/* disable promiscuous modes in case they were enabled
* ignore any error if disabling process failed
*/

4
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.h
View File

@ -22,6 +22,10 @@
#define VF_DEVICE_STATUS 0xAA
#define VF_TRANS_PENDING_M 0x20
/* wait defines for polling PF_PCI_CIAD register status */
#define ICE_PCI_CIAD_WAIT_COUNT 100
#define ICE_PCI_CIAD_WAIT_DELAY_US 1
/* Specific VF states */
enum ice_vf_states {
ICE_VF_STATE_INIT = 0,