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octeontx2-pf: Sort the allocated MCAM entry indices

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Per single mailbox request a maximum of 256 MCAM entries
can be allocated. If more than 256 are being allocated, then
the mcam indices in the final list could get jumbled. Hence
sort the indices.

Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sunil Goutham
2021-08-17 10:14:48 +05:30
committed by David S. Miller
parent 3cffaed213
commit cc65fcab88
1 changed files with 15 additions and 0 deletions
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15
drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
View File

@@ -5,6 +5,7 @@
*/
#include <net/ipv6.h>
#include <linux/sort.h>
#include "otx2_common.h"
@@ -61,6 +62,11 @@ static int otx2_free_ntuple_mcam_entries(struct otx2_nic *pfvf)
return 0;
}
static int mcam_entry_cmp(const void *a, const void *b)
{
return *(u16 *)a - *(u16 *)b;
}
static int otx2_alloc_ntuple_mcam_entries(struct otx2_nic *pfvf, u16 count)
{
struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
@@ -120,6 +126,15 @@ static int otx2_alloc_ntuple_mcam_entries(struct otx2_nic *pfvf, u16 count)
break;
}
/* Multiple MCAM entry alloc requests could result in non-sequential
* MCAM entries in the flow_ent[] array. Sort them in an ascending order,
* otherwise user installed ntuple filter index and MCAM entry index will
* not be in sync.
*/
if (allocated)
sort(&flow_cfg->flow_ent[0], allocated,
sizeof(flow_cfg->flow_ent[0]), mcam_entry_cmp, NULL);
exit:
mutex_unlock(&pfvf->mbox.lock);