be2net: fix some cmds to use mccq instead of mbox

All cmds issued to BE after the creation of mccq must now use the mcc-q
(and not mbox) to avoid a hw issue that results in mbox poll timeout.

Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 246 insertions, 166 deletions

diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c
index 1db092498309..3dd76c4170bf 100644
--- a/drivers/net/benet/be_cmds.c
+++ b/drivers/net/benet/be_cmds.c
@@ -59,15 +59,22 @@ static int be_mcc_compl_process(struct be_adapter *adapter,
 
         compl_status = (compl->status >> CQE_STATUS_COMPL_SHIFT) &
                                 CQE_STATUS_COMPL_MASK;
-        if (compl_status != MCC_STATUS_SUCCESS) {
+        if (compl_status == MCC_STATUS_SUCCESS) {
+                if (compl->tag0 == OPCODE_ETH_GET_STATISTICS) {
+                        struct be_cmd_resp_get_stats *resp =
+                                                adapter->stats.cmd.va;
+                        be_dws_le_to_cpu(&resp->hw_stats,
+                                                sizeof(resp->hw_stats));
+                        netdev_stats_update(adapter);
+                }
+        } else if (compl_status != MCC_STATUS_NOT_SUPPORTED) {
                 extd_status = (compl->status >> CQE_STATUS_EXTD_SHIFT) &
                                 CQE_STATUS_EXTD_MASK;
                 dev_warn(&adapter->pdev->dev,
                         "Error in cmd completion: status(compl/extd)=%d/%d\n",
                         compl_status, extd_status);
-                return -1;
         }
-        return 0;
+        return compl_status;
 }
 
 /* Link state evt is a string of bytes; no need for endian swapping */
@@ -97,10 +104,10 @@ static struct be_mcc_compl *be_mcc_compl_get(struct be_adapter *adapter)
         return NULL;
 }
 
-void be_process_mcc(struct be_adapter *adapter)
+int be_process_mcc(struct be_adapter *adapter)
 {
         struct be_mcc_compl *compl;
-        int num = 0;
+        int num = 0, status = 0;
 
         spin_lock_bh(&adapter->mcc_cq_lock);
         while ((compl = be_mcc_compl_get(adapter))) {
@@ -111,38 +118,47 @@ void be_process_mcc(struct be_adapter *adapter)
                         /* Interpret compl as a async link evt */
                         be_async_link_state_process(adapter,
                                 (struct be_async_event_link_state *) compl);
-                } else {
-                        be_mcc_compl_process(adapter, compl);
-                        atomic_dec(&adapter->mcc_obj.q.used);
+                } else if (compl->flags & CQE_FLAGS_COMPLETED_MASK) {
+                                status = be_mcc_compl_process(adapter, compl);
+                                atomic_dec(&adapter->mcc_obj.q.used);
                 }
                 be_mcc_compl_use(compl);
                 num++;
         }
+
         if (num)
                 be_cq_notify(adapter, adapter->mcc_obj.cq.id, true, num);
+
         spin_unlock_bh(&adapter->mcc_cq_lock);
+        return status;
 }
 
 /* Wait till no more pending mcc requests are present */
-static void be_mcc_wait_compl(struct be_adapter *adapter)
+static int be_mcc_wait_compl(struct be_adapter *adapter)
 {
-#define mcc_timeout             50000 /* 5s timeout */
-        int i;
+#define mcc_timeout             120000 /* 12s timeout */
+        int i, status;
         for (i = 0; i < mcc_timeout; i++) {
-                be_process_mcc(adapter);
+                status = be_process_mcc(adapter);
+                if (status)
+                        return status;
+
                 if (atomic_read(&adapter->mcc_obj.q.used) == 0)
                         break;
                 udelay(100);
         }
-        if (i == mcc_timeout)
+        if (i == mcc_timeout) {
                 dev_err(&adapter->pdev->dev, "mccq poll timed out\n");
+                return -1;
+        }
+        return 0;
 }
 
 /* Notify MCC requests and wait for completion */
-static void be_mcc_notify_wait(struct be_adapter *adapter)
+static int be_mcc_notify_wait(struct be_adapter *adapter)
 {
         be_mcc_notify(adapter);
-        be_mcc_wait_compl(adapter);
+        return be_mcc_wait_compl(adapter);
 }
 
 static int be_mbox_db_ready_wait(struct be_adapter *adapter, void __iomem *db)
@@ -173,7 +189,7 @@ static int be_mbox_db_ready_wait(struct be_adapter *adapter, void __iomem *db)
  * Insert the mailbox address into the doorbell in two steps
  * Polls on the mbox doorbell till a command completion (or a timeout) occurs
  */
-static int be_mbox_notify(struct be_adapter *adapter)
+static int be_mbox_notify_wait(struct be_adapter *adapter)
 {
         int status;
         u32 val = 0;
@@ -182,8 +198,6 @@ static int be_mbox_notify(struct be_adapter *adapter)
         struct be_mcc_mailbox *mbox = mbox_mem->va;
         struct be_mcc_compl *compl = &mbox->compl;
 
-        memset(compl, 0, sizeof(*compl));
-
         val |= MPU_MAILBOX_DB_HI_MASK;
         /* at bits 2 - 31 place mbox dma addr msb bits 34 - 63 */
         val |= (upper_32_bits(mbox_mem->dma) >> 2) << 2;
@@ -310,34 +324,40 @@ static u32 eq_delay_to_mult(u32 usec_delay)
         return multiplier;
 }
 
-static inline struct be_mcc_wrb *wrb_from_mbox(struct be_dma_mem *mbox_mem)
+static inline struct be_mcc_wrb *wrb_from_mbox(struct be_adapter *adapter)
 {
-        return &((struct be_mcc_mailbox *)(mbox_mem->va))->wrb;
+        struct be_dma_mem *mbox_mem = &adapter->mbox_mem;
+        struct be_mcc_wrb *wrb
+                = &((struct be_mcc_mailbox *)(mbox_mem->va))->wrb;
+        memset(wrb, 0, sizeof(*wrb));
+        return wrb;
 }
 
-static inline struct be_mcc_wrb *wrb_from_mcc(struct be_queue_info *mccq)
+static struct be_mcc_wrb *wrb_from_mccq(struct be_adapter *adapter)
 {
-        struct be_mcc_wrb *wrb = NULL;
-        if (atomic_read(&mccq->used) < mccq->len) {
-                wrb = queue_head_node(mccq);
-                queue_head_inc(mccq);
-                atomic_inc(&mccq->used);
-                memset(wrb, 0, sizeof(*wrb));
-        }
+        struct be_queue_info *mccq = &adapter->mcc_obj.q;
+        struct be_mcc_wrb *wrb;
+
+        BUG_ON(atomic_read(&mccq->used) >= mccq->len);
+        wrb = queue_head_node(mccq);
+        queue_head_inc(mccq);
+        atomic_inc(&mccq->used);
+        memset(wrb, 0, sizeof(*wrb));
         return wrb;
 }
 
 int be_cmd_eq_create(struct be_adapter *adapter,
                 struct be_queue_info *eq, int eq_delay)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_eq_create *req = embedded_payload(wrb);
-        struct be_cmd_resp_eq_create *resp = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_eq_create *req;
         struct be_dma_mem *q_mem = &eq->dma_mem;
         int status;
 
         spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -359,25 +379,29 @@ int be_cmd_eq_create(struct be_adapter *adapter,
 
         be_cmd_page_addrs_prepare(req->pages, ARRAY_SIZE(req->pages), q_mem);
 
-        status = be_mbox_notify(adapter);
+        status = be_mbox_notify_wait(adapter);
         if (!status) {
+                struct be_cmd_resp_eq_create *resp = embedded_payload(wrb);
                 eq->id = le16_to_cpu(resp->eq_id);
                 eq->created = true;
         }
+
         spin_unlock(&adapter->mbox_lock);
         return status;
 }
 
+/* Uses mbox */
 int be_cmd_mac_addr_query(struct be_adapter *adapter, u8 *mac_addr,
                         u8 type, bool permanent, u32 if_handle)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_mac_query *req = embedded_payload(wrb);
-        struct be_cmd_resp_mac_query *resp = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_mac_query *req;
         int status;
 
         spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -388,27 +412,32 @@ int be_cmd_mac_addr_query(struct be_adapter *adapter, u8 *mac_addr,
         if (permanent) {
                 req->permanent = 1;
         } else {
-                req->if_id = cpu_to_le16((u16)if_handle);
+                req->if_id = cpu_to_le16((u16) if_handle);
                 req->permanent = 0;
         }
 
-        status = be_mbox_notify(adapter);
-        if (!status)
+        status = be_mbox_notify_wait(adapter);
+        if (!status) {
+                struct be_cmd_resp_mac_query *resp = embedded_payload(wrb);
                 memcpy(mac_addr, resp->mac.addr, ETH_ALEN);
+        }
 
         spin_unlock(&adapter->mbox_lock);
         return status;
 }
 
+/* Uses synchronous MCCQ */
 int be_cmd_pmac_add(struct be_adapter *adapter, u8 *mac_addr,
                 u32 if_id, u32 *pmac_id)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_pmac_add *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_pmac_add *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+        spin_lock_bh(&adapter->mcc_lock);
+
+        wrb = wrb_from_mccq(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -418,24 +447,27 @@ int be_cmd_pmac_add(struct be_adapter *adapter, u8 *mac_addr,
         req->if_id = cpu_to_le32(if_id);
         memcpy(req->mac_address, mac_addr, ETH_ALEN);
 
-        status = be_mbox_notify(adapter);
+        status = be_mcc_notify_wait(adapter);
         if (!status) {
                 struct be_cmd_resp_pmac_add *resp = embedded_payload(wrb);
                 *pmac_id = le32_to_cpu(resp->pmac_id);
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        spin_unlock_bh(&adapter->mcc_lock);
         return status;
 }
 
+/* Uses synchronous MCCQ */
 int be_cmd_pmac_del(struct be_adapter *adapter, u32 if_id, u32 pmac_id)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_pmac_del *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_pmac_del *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+        spin_lock_bh(&adapter->mcc_lock);
+
+        wrb = wrb_from_mccq(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -445,25 +477,29 @@ int be_cmd_pmac_del(struct be_adapter *adapter, u32 if_id, u32 pmac_id)
         req->if_id = cpu_to_le32(if_id);
         req->pmac_id = cpu_to_le32(pmac_id);
 
-        status = be_mbox_notify(adapter);
-        spin_unlock(&adapter->mbox_lock);
+        status = be_mcc_notify_wait(adapter);
+
+        spin_unlock_bh(&adapter->mcc_lock);
 
         return status;
 }
 
+/* Uses Mbox */
 int be_cmd_cq_create(struct be_adapter *adapter,
                 struct be_queue_info *cq, struct be_queue_info *eq,
                 bool sol_evts, bool no_delay, int coalesce_wm)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_cq_create *req = embedded_payload(wrb);
-        struct be_cmd_resp_cq_create *resp = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_cq_create *req;
         struct be_dma_mem *q_mem = &cq->dma_mem;
-        void *ctxt = &req->context;
+        void *ctxt;
         int status;
 
         spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
+        ctxt = &req->context;
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -486,11 +522,13 @@ int be_cmd_cq_create(struct be_adapter *adapter,
 
         be_cmd_page_addrs_prepare(req->pages, ARRAY_SIZE(req->pages), q_mem);
 
-        status = be_mbox_notify(adapter);
+        status = be_mbox_notify_wait(adapter);
         if (!status) {
+                struct be_cmd_resp_cq_create *resp = embedded_payload(wrb);
                 cq->id = le16_to_cpu(resp->cq_id);
                 cq->created = true;
         }
+
         spin_unlock(&adapter->mbox_lock);
 
         return status;
@@ -508,14 +546,17 @@ int be_cmd_mccq_create(struct be_adapter *adapter,
                         struct be_queue_info *mccq,
                         struct be_queue_info *cq)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_mcc_create *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_mcc_create *req;
         struct be_dma_mem *q_mem = &mccq->dma_mem;
-        void *ctxt = &req->context;
+        void *ctxt;
         int status;
 
         spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
+        ctxt = &req->context;
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -534,7 +575,7 @@ int be_cmd_mccq_create(struct be_adapter *adapter,
 
         be_cmd_page_addrs_prepare(req->pages, ARRAY_SIZE(req->pages), q_mem);
 
-        status = be_mbox_notify(adapter);
+        status = be_mbox_notify_wait(adapter);
         if (!status) {
                 struct be_cmd_resp_mcc_create *resp = embedded_payload(wrb);
                 mccq->id = le16_to_cpu(resp->id);
@@ -549,15 +590,17 @@ int be_cmd_txq_create(struct be_adapter *adapter,
                         struct be_queue_info *txq,
                         struct be_queue_info *cq)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_eth_tx_create *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_eth_tx_create *req;
         struct be_dma_mem *q_mem = &txq->dma_mem;
-        void *ctxt = &req->context;
+        void *ctxt;
         int status;
-        u32 len_encoded;
 
         spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
+        ctxt = &req->context;
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -568,10 +611,8 @@ int be_cmd_txq_create(struct be_adapter *adapter,
         req->ulp_num = BE_ULP1_NUM;
         req->type = BE_ETH_TX_RING_TYPE_STANDARD;
 
-        len_encoded = fls(txq->len); /* log2(len) + 1 */
-        if (len_encoded == 16)
-                len_encoded = 0;
-        AMAP_SET_BITS(struct amap_tx_context, tx_ring_size, ctxt, len_encoded);
+        AMAP_SET_BITS(struct amap_tx_context, tx_ring_size, ctxt,
+                be_encoded_q_len(txq->len));
         AMAP_SET_BITS(struct amap_tx_context, pci_func_id, ctxt,
                         be_pci_func(adapter));
         AMAP_SET_BITS(struct amap_tx_context, ctx_valid, ctxt, 1);
@@ -581,28 +622,32 @@ int be_cmd_txq_create(struct be_adapter *adapter,
 
         be_cmd_page_addrs_prepare(req->pages, ARRAY_SIZE(req->pages), q_mem);
 
-        status = be_mbox_notify(adapter);
+        status = be_mbox_notify_wait(adapter);
         if (!status) {
                 struct be_cmd_resp_eth_tx_create *resp = embedded_payload(wrb);
                 txq->id = le16_to_cpu(resp->cid);
                 txq->created = true;
         }
+
         spin_unlock(&adapter->mbox_lock);
 
         return status;
 }
 
+/* Uses mbox */
 int be_cmd_rxq_create(struct be_adapter *adapter,
                 struct be_queue_info *rxq, u16 cq_id, u16 frag_size,
                 u16 max_frame_size, u32 if_id, u32 rss)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_eth_rx_create *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_eth_rx_create *req;
         struct be_dma_mem *q_mem = &rxq->dma_mem;
         int status;
 
         spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -617,29 +662,34 @@ int be_cmd_rxq_create(struct be_adapter *adapter,
         req->max_frame_size = cpu_to_le16(max_frame_size);
         req->rss_queue = cpu_to_le32(rss);
 
-        status = be_mbox_notify(adapter);
+        status = be_mbox_notify_wait(adapter);
         if (!status) {
                 struct be_cmd_resp_eth_rx_create *resp = embedded_payload(wrb);
                 rxq->id = le16_to_cpu(resp->id);
                 rxq->created = true;
         }
+
         spin_unlock(&adapter->mbox_lock);
 
         return status;
 }
 
-/* Generic destroyer function for all types of queues */
+/* Generic destroyer function for all types of queues
+ * Uses Mbox
+ */
 int be_cmd_q_destroy(struct be_adapter *adapter, struct be_queue_info *q,
                 int queue_type)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_q_destroy *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_q_destroy *req;
         u8 subsys = 0, opcode = 0;
         int status;
 
         spin_lock(&adapter->mbox_lock);
 
-        memset(wrb, 0, sizeof(*wrb));
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
+
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
         switch (queue_type) {
@@ -669,23 +719,27 @@ int be_cmd_q_destroy(struct be_adapter *adapter, struct be_queue_info *q,
         be_cmd_hdr_prepare(&req->hdr, subsys, opcode, sizeof(*req));
         req->id = cpu_to_le16(q->id);
 
-        status = be_mbox_notify(adapter);
+        status = be_mbox_notify_wait(adapter);
 
         spin_unlock(&adapter->mbox_lock);
 
         return status;
 }
 
-/* Create an rx filtering policy configuration on an i/f */
+/* Create an rx filtering policy configuration on an i/f
+ * Uses mbox
+ */
 int be_cmd_if_create(struct be_adapter *adapter, u32 flags, u8 *mac,
                 bool pmac_invalid, u32 *if_handle, u32 *pmac_id)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_if_create *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_if_create *req;
         int status;
 
         spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -694,10 +748,11 @@ int be_cmd_if_create(struct be_adapter *adapter, u32 flags, u8 *mac,
 
         req->capability_flags = cpu_to_le32(flags);
         req->enable_flags = cpu_to_le32(flags);
+        req->pmac_invalid = pmac_invalid;
         if (!pmac_invalid)
                 memcpy(req->mac_addr, mac, ETH_ALEN);
 
-        status = be_mbox_notify(adapter);
+        status = be_mbox_notify_wait(adapter);
         if (!status) {
                 struct be_cmd_resp_if_create *resp = embedded_payload(wrb);
                 *if_handle = le32_to_cpu(resp->interface_id);
@@ -709,14 +764,17 @@ int be_cmd_if_create(struct be_adapter *adapter, u32 flags, u8 *mac,
         return status;
 }
 
+/* Uses mbox */
 int be_cmd_if_destroy(struct be_adapter *adapter, u32 interface_id)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_if_destroy *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_if_destroy *req;
         int status;
 
         spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -724,7 +782,8 @@ int be_cmd_if_destroy(struct be_adapter *adapter, u32 interface_id)
                 OPCODE_COMMON_NTWK_INTERFACE_DESTROY, sizeof(*req));
 
         req->interface_id = cpu_to_le32(interface_id);
-        status = be_mbox_notify(adapter);
+
+        status = be_mbox_notify_wait(adapter);
 
         spin_unlock(&adapter->mbox_lock);
 
@@ -733,20 +792,22 @@ int be_cmd_if_destroy(struct be_adapter *adapter, u32 interface_id)
 
 /* Get stats is a non embedded command: the request is not embedded inside
  * WRB but is a separate dma memory block
+ * Uses asynchronous MCC
  */
 int be_cmd_get_stats(struct be_adapter *adapter, struct be_dma_mem *nonemb_cmd)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_get_stats *req = nonemb_cmd->va;
-        struct be_sge *sge = nonembedded_sgl(wrb);
-        int status;
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_get_stats *req;
+        struct be_sge *sge;
 
-        spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+        spin_lock_bh(&adapter->mcc_lock);
 
-        memset(req, 0, sizeof(*req));
+        wrb = wrb_from_mccq(adapter);
+        req = nonemb_cmd->va;
+        sge = nonembedded_sgl(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), false, 1);
+        wrb->tag0 = OPCODE_ETH_GET_STATISTICS;
 
         be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ETH,
                 OPCODE_ETH_GET_STATISTICS, sizeof(*req));
@@ -754,59 +815,61 @@ int be_cmd_get_stats(struct be_adapter *adapter, struct be_dma_mem *nonemb_cmd)
         sge->pa_lo = cpu_to_le32(nonemb_cmd->dma & 0xFFFFFFFF);
         sge->len = cpu_to_le32(nonemb_cmd->size);
 
-        status = be_mbox_notify(adapter);
-        if (!status) {
-                struct be_cmd_resp_get_stats *resp = nonemb_cmd->va;
-                be_dws_le_to_cpu(&resp->hw_stats, sizeof(resp->hw_stats));
-        }
+        be_mcc_notify(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
-        return status;
+        spin_unlock_bh(&adapter->mcc_lock);
+        return 0;
 }
 
+/* Uses synchronous mcc */
 int be_cmd_link_status_query(struct be_adapter *adapter,
                         bool *link_up)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_link_status *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_link_status *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        spin_lock_bh(&adapter->mcc_lock);
+
+        wrb = wrb_from_mccq(adapter);
+        req = embedded_payload(wrb);
 
         *link_up = false;
-        memset(wrb, 0, sizeof(*wrb));
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
         be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
                 OPCODE_COMMON_NTWK_LINK_STATUS_QUERY, sizeof(*req));
 
-        status = be_mbox_notify(adapter);
+        status = be_mcc_notify_wait(adapter);
         if (!status) {
                 struct be_cmd_resp_link_status *resp = embedded_payload(wrb);
                 if (resp->mac_speed != PHY_LINK_SPEED_ZERO)
                         *link_up = true;
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        spin_unlock_bh(&adapter->mcc_lock);
         return status;
 }
 
+/* Uses Mbox */
 int be_cmd_get_fw_ver(struct be_adapter *adapter, char *fw_ver)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_get_fw_version *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_get_fw_version *req;
         int status;
 
         spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
         be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
                 OPCODE_COMMON_GET_FW_VERSION, sizeof(*req));
 
-        status = be_mbox_notify(adapter);
+        status = be_mbox_notify_wait(adapter);
         if (!status) {
                 struct be_cmd_resp_get_fw_version *resp = embedded_payload(wrb);
                 strncpy(fw_ver, resp->firmware_version_string, FW_VER_LEN);
@@ -816,15 +879,18 @@ int be_cmd_get_fw_ver(struct be_adapter *adapter, char *fw_ver)
         return status;
 }
 
-/* set the EQ delay interval of an EQ to specified value */
+/* set the EQ delay interval of an EQ to specified value
+ * Uses async mcc
+ */
 int be_cmd_modify_eqd(struct be_adapter *adapter, u32 eq_id, u32 eqd)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_modify_eq_delay *req = embedded_payload(wrb);
-        int status;
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_modify_eq_delay *req;
 
-        spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+        spin_lock_bh(&adapter->mcc_lock);
+
+        wrb = wrb_from_mccq(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -836,21 +902,24 @@ int be_cmd_modify_eqd(struct be_adapter *adapter, u32 eq_id, u32 eqd)
         req->delay[0].phase = 0;
         req->delay[0].delay_multiplier = cpu_to_le32(eqd);
 
-        status = be_mbox_notify(adapter);
+        be_mcc_notify(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
-        return status;
+        spin_unlock_bh(&adapter->mcc_lock);
+        return 0;
 }
 
+/* Uses sycnhronous mcc */
 int be_cmd_vlan_config(struct be_adapter *adapter, u32 if_id, u16 *vtag_array,
                         u32 num, bool untagged, bool promiscuous)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_vlan_config *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_vlan_config *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+        spin_lock_bh(&adapter->mcc_lock);
+
+        wrb = wrb_from_mccq(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -866,23 +935,24 @@ int be_cmd_vlan_config(struct be_adapter *adapter, u32 if_id, u16 *vtag_array,
                         req->num_vlan * sizeof(vtag_array[0]));
         }
 
-        status = be_mbox_notify(adapter);
+        status = be_mcc_notify_wait(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
+        spin_unlock_bh(&adapter->mcc_lock);
         return status;
 }
 
-/* Use MCC for this command as it may be called in BH context */
+/* Uses MCC for this command as it may be called in BH context
+ * Uses synchronous mcc
+ */
 int be_cmd_promiscuous_config(struct be_adapter *adapter, u8 port_num, bool en)
 {
         struct be_mcc_wrb *wrb;
         struct be_cmd_req_promiscuous_config *req;
+        int status;
 
         spin_lock_bh(&adapter->mcc_lock);
 
-        wrb = wrb_from_mcc(&adapter->mcc_obj.q);
-        BUG_ON(!wrb);
-
+        wrb = wrb_from_mccq(adapter);
         req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
@@ -895,14 +965,14 @@ int be_cmd_promiscuous_config(struct be_adapter *adapter, u8 port_num, bool en)
         else
                 req->port0_promiscuous = en;
 
-        be_mcc_notify_wait(adapter);
+        status = be_mcc_notify_wait(adapter);
 
         spin_unlock_bh(&adapter->mcc_lock);
-        return 0;
+        return status;
 }
 
 /*
- * Use MCC for this command as it may be called in BH context
+ * Uses MCC for this command as it may be called in BH context
  * (mc == NULL) => multicast promiscous
  */
 int be_cmd_multicast_set(struct be_adapter *adapter, u32 if_id,
@@ -914,9 +984,7 @@ int be_cmd_multicast_set(struct be_adapter *adapter, u32 if_id,
 
         spin_lock_bh(&adapter->mcc_lock);
 
-        wrb = wrb_from_mcc(&adapter->mcc_obj.q);
-        BUG_ON(!wrb);
-
+        wrb = wrb_from_mccq(adapter);
         req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
@@ -944,15 +1012,17 @@ int be_cmd_multicast_set(struct be_adapter *adapter, u32 if_id,
         return 0;
 }
 
+/* Uses synchrounous mcc */
 int be_cmd_set_flow_control(struct be_adapter *adapter, u32 tx_fc, u32 rx_fc)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_set_flow_control *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_set_flow_control *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        spin_lock_bh(&adapter->mcc_lock);
 
-        memset(wrb, 0, sizeof(*wrb));
+        wrb = wrb_from_mccq(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
@@ -962,28 +1032,30 @@ int be_cmd_set_flow_control(struct be_adapter *adapter, u32 tx_fc, u32 rx_fc)
         req->tx_flow_control = cpu_to_le16((u16)tx_fc);
         req->rx_flow_control = cpu_to_le16((u16)rx_fc);
 
-        status = be_mbox_notify(adapter);
+        status = be_mcc_notify_wait(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
+        spin_unlock_bh(&adapter->mcc_lock);
         return status;
 }
 
+/* Uses sycn mcc */
 int be_cmd_get_flow_control(struct be_adapter *adapter, u32 *tx_fc, u32 *rx_fc)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_get_flow_control *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_get_flow_control *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        spin_lock_bh(&adapter->mcc_lock);
 
-        memset(wrb, 0, sizeof(*wrb));
+        wrb = wrb_from_mccq(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
         be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
                 OPCODE_COMMON_GET_FLOW_CONTROL, sizeof(*req));
 
-        status = be_mbox_notify(adapter);
+        status = be_mcc_notify_wait(adapter);
         if (!status) {
                 struct be_cmd_resp_get_flow_control *resp =
                                                 embedded_payload(wrb);
@@ -991,26 +1063,28 @@ int be_cmd_get_flow_control(struct be_adapter *adapter, u32 *tx_fc, u32 *rx_fc)
                 *rx_fc = le16_to_cpu(resp->rx_flow_control);
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        spin_unlock_bh(&adapter->mcc_lock);
         return status;
 }
 
+/* Uses mbox */
 int be_cmd_query_fw_cfg(struct be_adapter *adapter, u32 *port_num)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_query_fw_cfg *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_query_fw_cfg *req;
         int status;
 
         spin_lock(&adapter->mbox_lock);
 
-        memset(wrb, 0, sizeof(*wrb));
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
         be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
                 OPCODE_COMMON_QUERY_FIRMWARE_CONFIG, sizeof(*req));
 
-        status = be_mbox_notify(adapter);
+        status = be_mbox_notify_wait(adapter);
         if (!status) {
                 struct be_cmd_resp_query_fw_cfg *resp = embedded_payload(wrb);
                 *port_num = le32_to_cpu(resp->phys_port);
@@ -1020,22 +1094,24 @@ int be_cmd_query_fw_cfg(struct be_adapter *adapter, u32 *port_num)
         return status;
 }
 
+/* Uses mbox */
 int be_cmd_reset_function(struct be_adapter *adapter)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
-        struct be_cmd_req_hdr *req = embedded_payload(wrb);
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_hdr *req;
         int status;
 
         spin_lock(&adapter->mbox_lock);
 
-        memset(wrb, 0, sizeof(*wrb));
+        wrb = wrb_from_mbox(adapter);
+        req = embedded_payload(wrb);
 
         be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
 
         be_cmd_hdr_prepare(req, CMD_SUBSYSTEM_COMMON,
                 OPCODE_COMMON_FUNCTION_RESET, sizeof(*req));
 
-        status = be_mbox_notify(adapter);
+        status = be_mbox_notify_wait(adapter);
 
         spin_unlock(&adapter->mbox_lock);
         return status;
@@ -1044,13 +1120,17 @@ int be_cmd_reset_function(struct be_adapter *adapter)
 int be_cmd_write_flashrom(struct be_adapter *adapter, struct be_dma_mem *cmd,
                         u32 flash_type, u32 flash_opcode, u32 buf_size)
 {
-        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
+        struct be_mcc_wrb *wrb;
         struct be_cmd_write_flashrom *req = cmd->va;
-        struct be_sge *sge = nonembedded_sgl(wrb);
+        struct be_sge *sge;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
-        memset(wrb, 0, sizeof(*wrb));
+        spin_lock_bh(&adapter->mcc_lock);
+
+        wrb = wrb_from_mccq(adapter);
+        req = embedded_payload(wrb);
+        sge = nonembedded_sgl(wrb);
+
         be_wrb_hdr_prepare(wrb, cmd->size, false, 1);
 
         be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
@@ -1063,8 +1143,8 @@ int be_cmd_write_flashrom(struct be_adapter *adapter, struct be_dma_mem *cmd,
         req->params.op_code = cpu_to_le32(flash_opcode);
         req->params.data_buf_size = cpu_to_le32(buf_size);
 
-        status = be_mbox_notify(adapter);
+        status = be_mcc_notify_wait(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
+        spin_unlock_bh(&adapter->mcc_lock);
         return status;
 }