ON-16207: Don't print filter information for dummy hw filters

The debugfs output for efct prints information for the currently
installed filters. Now that we are using a dummy filter to specify the
ownership of rxq 0, we shouldn't output this alongside the real hw
filters. A dummy driv_id for the filter is used to determine if the
filter is real or not. A value of -1 is chosen for this dummy id value
since the X3 net driver uses this value to index in to a table, so it
should give negative/extremely large numbers.

src/include/ci/efhw/efct_filters.h

@@ -15,6 +15,8 @@ struct efct_filter_insert_out {
 };
 struct efct_filter_state;
 
+#define EFCT_HW_FILTER_DRV_ID_DUMMY ((uint64_t)~0)
+
 typedef int (*drv_filter_insert)(const struct efct_filter_insert_in *in,
                                  struct efct_filter_insert_out *out);
 

src/lib/efhw/debugfs_efct.c

@@ -10,6 +10,7 @@
 #include <ci/efhw/nic.h>
 #include <ci/efhw/efct.h>
 #include <ci/efhw/ef10ct.h>
+#include <ci/efhw/efct_filters.h>
 
 #include "linux_resource_internal.h"
 #include "debugfs.h"
@@ -30,6 +31,8 @@ static int efct_debugfs_read_hw_filters(struct seq_file *file,
   for( i = 0; i < fs->hw_filters_n; i++ ) {
     filter = &fs->hw_filters[i];
     if( filter->refcount > 0 ) {
+      if( filter->drv_id == EFCT_HW_FILTER_DRV_ID_DUMMY)
+        continue;
       if( filter->remote_ip )
         snprintf(remote_ip_buf, sizeof(remote_ip_buf), "%pI4:%d ",
                  &filter->remote_ip, ntohs(filter->remote_port));

src/lib/efhw/efct_filters.c

@@ -89,6 +89,7 @@ void efct_filter_state_reserve_rxq(struct efct_filter_state *state, int rxq)
   EFHW_ASSERT(state->hw_filters_n > rxq);
   state->hw_filters[rxq].rxq = 0;
   state->hw_filters[rxq].refcount = 1;
+  state->hw_filters[rxq].drv_id = EFCT_HW_FILTER_DRV_ID_DUMMY;
 }