From: Prashant Sreedharan <prashant.sreedha...@broadcom.com>
Allocate napi for special vnic, packets arriving on this
napi will simply be dropped and the buffers will be replenished back
to the HW.
Signed-off-by: Prashant Sreedharan <prashant.sreedha...@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.vo...@broadcom.com>
Signed-off-by: Michael Chan <michael.c...@broadcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 81 ++++++++++++++++++++++++++++++-
1 file changed, 80 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 75a8b30..f0aa582 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1668,6 +1668,76 @@ static int bnxt_poll_work(struct bnxt *bp, struct
bnxt_napi *bnapi, int budget)
return rx_pkts;
}
+static int bnxt_poll_nitroa0(struct napi_struct *napi, int budget)
+{
+ struct bnxt_napi *bnapi = container_of(napi, struct bnxt_napi, napi);
+ struct bnxt *bp = bnapi->bp;
+ struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring;
+ struct bnxt_rx_ring_info *rxr = bnapi->rx_ring;
+ struct tx_cmp *txcmp;
+ struct rx_cmp_ext *rxcmp1;
+ u32 cp_cons, tmp_raw_cons;
+ u32 raw_cons = cpr->cp_raw_cons;
+ u32 rx_pkts = 0;
+ bool agg_event = false;
+
+ while (1) {
+ int rc;
+
+ cp_cons = RING_CMP(raw_cons);
+ txcmp = &cpr->cp_desc_ring[CP_RING(cp_cons)][CP_IDX(cp_cons)];
+
+ if (!TX_CMP_VALID(txcmp, raw_cons))
+ break;
+
+ if ((TX_CMP_TYPE(txcmp) & 0x30) == 0x10) {
+ tmp_raw_cons = NEXT_RAW_CMP(raw_cons);
+ cp_cons = RING_CMP(tmp_raw_cons);
+ rxcmp1 = (struct rx_cmp_ext *)
+ &cpr->cp_desc_ring[CP_RING(cp_cons)][CP_IDX(cp_cons)];
+
+ if (!RX_CMP_VALID(rxcmp1, tmp_raw_cons))
+ break;
+
+ /* force an error to recycle the buffer */
+ rxcmp1->rx_cmp_cfa_code_errors_v2 |=
+ cpu_to_le32(RX_CMPL_ERRORS_CRC_ERROR);
+
+ rc = bnxt_rx_pkt(bp, bnapi, &raw_cons, &agg_event);
+ if (likely(rc == -EIO))
+ rx_pkts++;
+ else if (rc == -EBUSY) /* partial completion */
+ break;
+ } else if (unlikely(TX_CMP_TYPE(txcmp) ==
+ CMPL_BASE_TYPE_HWRM_DONE)) {
+ bnxt_hwrm_handler(bp, txcmp);
+ } else {
+ netdev_err(bp->dev,
+ "Invalid completion received on special
ring\n");
+ }
+ raw_cons = NEXT_RAW_CMP(raw_cons);
+
+ if (rx_pkts == budget)
+ break;
+ }
+
+ cpr->cp_raw_cons = raw_cons;
+ BNXT_CP_DB(cpr->cp_doorbell, cpr->cp_raw_cons);
+ writel(DB_KEY_RX | rxr->rx_prod, rxr->rx_doorbell);
+ writel(DB_KEY_RX | rxr->rx_prod, rxr->rx_doorbell);
+
+ if (agg_event) {
+ writel(DB_KEY_RX | rxr->rx_agg_prod, rxr->rx_agg_doorbell);
+ writel(DB_KEY_RX | rxr->rx_agg_prod, rxr->rx_agg_doorbell);
+ }
+
+ if (!bnxt_has_work(bp, cpr) && rx_pkts < budget) {
+ napi_complete(napi);
+ BNXT_CP_DB_REARM(cpr->cp_doorbell, cpr->cp_raw_cons);
+ }
+ return rx_pkts;
+}
+
static int bnxt_poll(struct napi_struct *napi, int budget)
{
struct bnxt_napi *bnapi = container_of(napi, struct bnxt_napi, napi);
@@ -4758,14 +4828,23 @@ static void bnxt_del_napi(struct bnxt *bp)
static void bnxt_init_napi(struct bnxt *bp)
{
int i;
+ unsigned int cp_nr_rings = bp->cp_nr_rings;
struct bnxt_napi *bnapi;
if (bp->flags & BNXT_FLAG_USING_MSIX) {
- for (i = 0; i < bp->cp_nr_rings; i++) {
+ if (BNXT_CHIP_TYPE_NITRO_A0(bp))
+ cp_nr_rings--;
+ for (i = 0; i < cp_nr_rings; i++) {
bnapi = bp->bnapi[i];
netif_napi_add(bp->dev, &bnapi->napi,
bnxt_poll, 64);
}
+ if (BNXT_CHIP_TYPE_NITRO_A0(bp)) {
+ bnapi = bp->bnapi[cp_nr_rings];
+ netif_napi_add(bp->dev, &bnapi->napi,
+ bnxt_poll_nitroa0, 64);
+ napi_hash_add(&bnapi->napi);
+ }
} else {
bnapi = bp->bnapi[0];
netif_napi_add(bp->dev, &bnapi->napi, bnxt_poll, 64);
--
1.8.3.1
