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i40e: refactor i40e_update_filter_state to avoid passing aq_err 

The current caller of i40e_update_filter_state incorrectly passes
aq_ret, an i40e_status variable, instead of the expected aq_err. This
happens to work because i40e_status is actually just a typedef integer,
and 0 is still the successful return. However i40e_update_filter_state
has special handling for ENOSPC which is currently being ignored.

Also notice that firmware does not update the per-filter response for
many types of errors, such as EINVAL. Thus, modify the filter setup so
that the firmware response memory is pre-set with I40E_AQC_MM_ERR_NO_RES.

This enables us to refactor i40e_update_filter_state, removing the need
to pass aq_err and avoiding a need for having 3 different flows for
checking the filter state.

The resulting code for i40e_update_filter_state is much simpler, only
a single loop and we always check each filter response value every time.
Since we pre-set the response value to match our expected error this
correctly works for all success and error flows.

Change-ID: Ie292c9511f34ee18c6ef40f955ad13e28b7aea7d
Signed-off-by: Jacob Keller <jacob.e.keller@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:
Jacob Keller 2016-11-11 12:39:27 -08:00 committed by Jeff Kirsher
parent 38326218ac
commit ac9e239014
1 changed files with 21 additions and 37 deletions
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58
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -1757,7 +1757,6 @@ static void i40e_undo_filter_entries(struct i40e_vsi *vsi,
* @count: Number of filters added
* @add_list: return data from fw
* @head: pointer to first filter in current batch
* @aq_err: status from fw
*
* MAC filter entries from list were slated to be added to device. Returns
* number of successful filters. Note that 0 does NOT mean success!
@ -1765,47 +1764,30 @@ static void i40e_undo_filter_entries(struct i40e_vsi *vsi,
static int
i40e_update_filter_state(int count,
struct i40e_aqc_add_macvlan_element_data *add_list,
struct i40e_mac_filter *add_head, int aq_err)
struct i40e_mac_filter *add_head)
{
int retval = 0;
int i;
if (!aq_err) {
retval = count;
/* Everything's good, mark all filters active. */
for (i = 0; i < count ; i++) {
add_head->state = I40E_FILTER_ACTIVE;
add_head = hlist_entry(add_head->hlist.next,
typeof(struct i40e_mac_filter),
hlist);
}
} else if (aq_err == I40E_AQ_RC_ENOSPC) {
/* Device ran out of filter space. Check the return value
* for each filter to see which ones are active.
for (i = 0; i < count; i++) {
/* Always check status of each filter. We don't need to check
* the firmware return status because we pre-set the filter
* status to I40E_AQC_MM_ERR_NO_RES when sending the filter
* request to the adminq. Thus, if it no longer matches then
* we know the filter is active.
*/
for (i = 0; i < count ; i++) {
if (add_list[i].match_method ==
I40E_AQC_MM_ERR_NO_RES) {
add_head->state = I40E_FILTER_FAILED;
} else {
add_head->state = I40E_FILTER_ACTIVE;
retval++;
}
add_head = hlist_entry(add_head->hlist.next,
typeof(struct i40e_mac_filter),
hlist);
}
} else {
/* Some other horrible thing happened, fail all filters */
retval = 0;
for (i = 0; i < count ; i++) {
if (add_list[i].match_method == I40E_AQC_MM_ERR_NO_RES) {
add_head->state = I40E_FILTER_FAILED;
add_head = hlist_entry(add_head->hlist.next,
typeof(struct i40e_mac_filter),
hlist);
} else {
add_head->state = I40E_FILTER_ACTIVE;
retval++;
}
add_head = hlist_entry(add_head->hlist.next,
typeof(struct i40e_mac_filter),
hlist);
}
return retval;
}
@ -1864,12 +1846,11 @@ void i40e_aqc_add_filters(struct i40e_vsi *vsi, const char *vsi_name,
int num_add, bool *promisc_changed)
{
struct i40e_hw *hw = &vsi->back->hw;
i40e_status aq_ret;
int aq_err, fcnt;
aq_ret = i40e_aq_add_macvlan(hw, vsi->seid, list, num_add, NULL);
i40e_aq_add_macvlan(hw, vsi->seid, list, num_add, NULL);
aq_err = hw->aq.asq_last_status;
fcnt = i40e_update_filter_state(num_add, list, add_head, aq_ret);
fcnt = i40e_update_filter_state(num_add, list, add_head);
if (fcnt != num_add) {
*promisc_changed = true;
@ -2168,6 +2149,9 @@ int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
cpu_to_le16((u16)(f->vlan));
}
add_list[num_add].queue_number = 0;
/* set invalid match method for later detection */
add_list[num_add].match_method =
cpu_to_le16((u16)I40E_AQC_MM_ERR_NO_RES);
cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
add_list[num_add].flags = cpu_to_le16(cmd_flags);
num_add++;