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ice: Fix check for contiguous TCs 

The current implementation for contiguous TC check
is assuming that the UPs will be mapped to TCs in
a linear progressing fashion.  This is obviously
not always true.

Change the check to allow for various UP2TC mapping
configurations.

Signed-off-by: Dave Ertman <david.m.ertman@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:
Dave Ertman 2020-05-07 17:41:01 -07:00 committed by Jeff Kirsher
parent 610ed0e93e
commit 891540024b
1 changed files with 12 additions and 7 deletions
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19
drivers/net/ethernet/intel/ice/ice_dcb_lib.c
View File

@ -584,16 +584,21 @@ static int ice_dcb_sw_dflt_cfg(struct ice_pf *pf, bool ets_willing, bool locked)
*/
static bool ice_dcb_tc_contig(u8 *prio_table)
{
u8 max_tc = 0;
bool found_empty = false;
u8 used_tc = 0;
int i;
for (i = 0; i < CEE_DCBX_MAX_PRIO; i++) {
u8 cur_tc = prio_table[i];
/* Create a bitmap of used TCs */
for (i = 0; i < CEE_DCBX_MAX_PRIO; i++)
used_tc |= BIT(prio_table[i]);
if (cur_tc > max_tc)
return false;
else if (cur_tc == max_tc)
max_tc++;
for (i = 0; i < CEE_DCBX_MAX_PRIO; i++) {
if (used_tc & BIT(i)) {
if (found_empty)
return false;
} else {
found_empty = true;
}
}
return true;