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i40e: Changes to Interrupt distribution policy

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This patch changes the way resources are distributed to special features.

Change-ID: I847e49d714a1d70e97f3f994cb39bfb5e02ab016
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Anjali Singhai Jain 2014-05-21 23:32:43 +00:00 • committed by Jeff Kirsher
parent c674d1250b
commit a34977ba6c
1 changed files with 19 additions and 6 deletions
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25
drivers/net/ethernet/intel/i40e/i40e_main.c
View file

@ -6228,6 +6228,16 @@ static int i40e_init_msix(struct i40e_pf *pf)
for (i = 0; i < v_budget; i++)
pf->msix_entries[i].entry = i;
vec = i40e_reserve_msix_vectors(pf, v_budget);
if (vec != v_budget) {
/* If we have limited resources, we will start with no vectors
* for the special features and then allocate vectors to some
* of these features based on the policy and at the end disable
* the features that did not get any vectors.
*/
pf->num_vmdq_msix = 0;
}
if (vec < I40E_MIN_MSIX) {
pf->flags &= ~I40E_FLAG_MSIX_ENABLED;
kfree(pf->msix_entries);
@ -6236,27 +6246,25 @@ static int i40e_init_msix(struct i40e_pf *pf)
} else if (vec == I40E_MIN_MSIX) {
/* Adjust for minimal MSIX use */
dev_info(&pf->pdev->dev, "Features disabled, not enough MSI-X vectors\n");
pf->flags &= ~I40E_FLAG_VMDQ_ENABLED;
pf->num_vmdq_vsis = 0;
pf->num_vmdq_qps = 0;
pf->num_vmdq_msix = 0;
pf->num_lan_qps = 1;
pf->num_lan_msix = 1;
} else if (vec != v_budget) {
/* reserve the misc vector */
vec--;
/* Scale vector usage down */
pf->num_vmdq_msix = 1; /* force VMDqs to only one vector */
vec--; /* reserve the misc vector */
pf->num_vmdq_vsis = 1;
/* partition out the remaining vectors */
switch (vec) {
case 2:
pf->num_vmdq_vsis = 1;
pf->num_lan_msix = 1;
break;
case 3:
pf->num_vmdq_vsis = 1;
pf->num_lan_msix = 2;
break;
default:
@ -6268,6 +6276,11 @@ static int i40e_init_msix(struct i40e_pf *pf)
}
}
if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
(pf->num_vmdq_msix == 0)) {
dev_info(&pf->pdev->dev, "VMDq disabled, not enough MSI-X vectors\n");
pf->flags &= ~I40E_FLAG_VMDQ_ENABLED;
}
return err;
}