5 files changed, 197 insertions, 67 deletions

diff --git a/drivers/net/cxgb3/adapter.h b/drivers/net/cxgb3/adapter.h
index 71eaa431371d..714df2b675e6 100644
--- a/drivers/net/cxgb3/adapter.h
+++ b/drivers/net/cxgb3/adapter.h
@@ -85,6 +85,8 @@ struct fl_pg_chunk {
         struct page *page;
         void *va;
         unsigned int offset;
+        u64 *p_cnt;
+        DECLARE_PCI_UNMAP_ADDR(mapping);
 };
 
 struct rx_desc;
@@ -101,6 +103,7 @@ struct sge_fl {                     /* SGE per free-buffer list state */
         struct fl_pg_chunk pg_chunk;/* page chunk cache */
         unsigned int use_pages;     /* whether FL uses pages or sk_buffs */
         unsigned int order;         /* order of page allocations */
+        unsigned int alloc_size;    /* size of allocated buffer */
         struct rx_desc *desc;       /* address of HW Rx descriptor ring */
         struct rx_sw_desc *sdesc;   /* address of SW Rx descriptor ring */
         dma_addr_t   phys_addr;     /* physical address of HW ring start */
@@ -291,6 +294,7 @@ void t3_os_link_fault_handler(struct adapter *adapter, int port_id);
 
 void t3_sge_start(struct adapter *adap);
 void t3_sge_stop(struct adapter *adap);
+void t3_start_sge_timers(struct adapter *adap);
 void t3_stop_sge_timers(struct adapter *adap);
 void t3_free_sge_resources(struct adapter *adap);
 void t3_sge_err_intr_handler(struct adapter *adapter);
diff --git a/drivers/net/cxgb3/common.h b/drivers/net/cxgb3/common.h
index 9ee021e750c8..e508dc32f3ec 100644
--- a/drivers/net/cxgb3/common.h
+++ b/drivers/net/cxgb3/common.h
@@ -191,7 +191,8 @@ struct mdio_ops {
 };
 
 struct adapter_info {
-        unsigned char nports;   /* # of ports */
+        unsigned char nports0;        /* # of ports on channel 0 */
+        unsigned char nports1;        /* # of ports on channel 1 */
         unsigned char phy_base_addr;    /* MDIO PHY base address */
         unsigned int gpio_out;  /* GPIO output settings */
         unsigned char gpio_intr[MAX_NPORTS]; /* GPIO PHY IRQ pins */
@@ -422,6 +423,7 @@ struct adapter_params {
         unsigned short b_wnd[NCCTRL_WIN];
 
         unsigned int nports;    /* # of ethernet ports */
+        unsigned int chan_map;  /* bitmap of in-use Tx channels */
         unsigned int stats_update_period;       /* MAC stats accumulation period */
         unsigned int linkpoll_period;   /* link poll period in 0.1s */
         unsigned int rev;       /* chip revision */
diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
index d8be89621bf7..2c2aaa741450 100644
--- a/drivers/net/cxgb3/cxgb3_main.c
+++ b/drivers/net/cxgb3/cxgb3_main.c
@@ -602,7 +602,6 @@ static int setup_sge_qsets(struct adapter *adap)
                                 &adap->params.sge.qset[qset_idx], ntxq, dev,
                                 netdev_get_tx_queue(dev, j));
                         if (err) {
-                                t3_stop_sge_timers(adap);
                                 t3_free_sge_resources(adap);
                                 return err;
                         }
@@ -1046,6 +1045,8 @@ static int cxgb_up(struct adapter *adap)
                 setup_rss(adap);
                 if (!(adap->flags & NAPI_INIT))
                         init_napi(adap);
+
+                t3_start_sge_timers(adap);
                 adap->flags |= FULL_INIT_DONE;
         }
 
@@ -2870,6 +2871,9 @@ static void t3_io_resume(struct pci_dev *pdev)
 {
         struct adapter *adapter = pci_get_drvdata(pdev);
 
+        CH_ALERT(adapter, "adapter recovering, PEX ERR 0x%x\n",
+                 t3_read_reg(adapter, A_PCIE_PEX_ERR));
+
         t3_resume_ports(adapter);
 }
 
@@ -3002,7 +3006,7 @@ static int __devinit init_one(struct pci_dev *pdev,
         static int version_printed;
 
         int i, err, pci_using_dac = 0;
-        unsigned long mmio_start, mmio_len;
+        resource_size_t mmio_start, mmio_len;
         const struct adapter_info *ai;
         struct adapter *adapter = NULL;
         struct port_info *pi;
@@ -3082,7 +3086,7 @@ static int __devinit init_one(struct pci_dev *pdev,
         INIT_WORK(&adapter->fatal_error_handler_task, fatal_error_task);
         INIT_DELAYED_WORK(&adapter->adap_check_task, t3_adap_check_task);
 
-        for (i = 0; i < ai->nports; ++i) {
+        for (i = 0; i < ai->nports0 + ai->nports1; ++i) {
                 struct net_device *netdev;
 
                 netdev = alloc_etherdev_mq(sizeof(struct port_info), SGE_QSETS);
@@ -3172,7 +3176,7 @@ static int __devinit init_one(struct pci_dev *pdev,
 
 out_free_dev:
         iounmap(adapter->regs);
-        for (i = ai->nports - 1; i >= 0; --i)
+        for (i = ai->nports0 + ai->nports1 - 1; i >= 0; --i)
                 if (adapter->port[i])
                         free_netdev(adapter->port[i]);
 
diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c
index a7555cb3fa4a..26d3587f3399 100644
--- a/drivers/net/cxgb3/sge.c
+++ b/drivers/net/cxgb3/sge.c
@@ -50,6 +50,7 @@
 #define SGE_RX_COPY_THRES  256
 #define SGE_RX_PULL_LEN    128
 
+#define SGE_PG_RSVD SMP_CACHE_BYTES
 /*
  * Page chunk size for FL0 buffers if FL0 is to be populated with page chunks.
  * It must be a divisor of PAGE_SIZE.  If set to 0 FL0 will use sk_buffs
@@ -57,8 +58,10 @@
  */
 #define FL0_PG_CHUNK_SIZE  2048
 #define FL0_PG_ORDER 0
+#define FL0_PG_ALLOC_SIZE (PAGE_SIZE << FL0_PG_ORDER)
 #define FL1_PG_CHUNK_SIZE (PAGE_SIZE > 8192 ? 16384 : 8192)
 #define FL1_PG_ORDER (PAGE_SIZE > 8192 ? 0 : 1)
+#define FL1_PG_ALLOC_SIZE (PAGE_SIZE << FL1_PG_ORDER)
 
 #define SGE_RX_DROP_THRES 16
 #define RX_RECLAIM_PERIOD (HZ/4)
@@ -345,13 +348,21 @@ static inline int should_restart_tx(const struct sge_txq *q)
         return q->in_use - r < (q->size >> 1);
 }
 
-static void clear_rx_desc(const struct sge_fl *q, struct rx_sw_desc *d)
+static void clear_rx_desc(struct pci_dev *pdev, const struct sge_fl *q,
+                          struct rx_sw_desc *d)
 {
-        if (q->use_pages) {
-                if (d->pg_chunk.page)
-                        put_page(d->pg_chunk.page);
+        if (q->use_pages && d->pg_chunk.page) {
+                (*d->pg_chunk.p_cnt)--;
+                if (!*d->pg_chunk.p_cnt)
+                        pci_unmap_page(pdev,
+                                       pci_unmap_addr(&d->pg_chunk, mapping),
+                                       q->alloc_size, PCI_DMA_FROMDEVICE);
+
+                put_page(d->pg_chunk.page);
                 d->pg_chunk.page = NULL;
         } else {
+                pci_unmap_single(pdev, pci_unmap_addr(d, dma_addr),
+                                 q->buf_size, PCI_DMA_FROMDEVICE);
                 kfree_skb(d->skb);
                 d->skb = NULL;
         }
@@ -372,9 +383,8 @@ static void free_rx_bufs(struct pci_dev *pdev, struct sge_fl *q)
         while (q->credits--) {
                 struct rx_sw_desc *d = &q->sdesc[cidx];
 
-                pci_unmap_single(pdev, pci_unmap_addr(d, dma_addr),
-                                 q->buf_size, PCI_DMA_FROMDEVICE);
-                clear_rx_desc(q, d);
+
+                clear_rx_desc(pdev, q, d);
                 if (++cidx == q->size)
                         cidx = 0;
         }
@@ -417,18 +427,39 @@ static inline int add_one_rx_buf(void *va, unsigned int len,
         return 0;
 }
 
-static int alloc_pg_chunk(struct sge_fl *q, struct rx_sw_desc *sd, gfp_t gfp,
+static inline int add_one_rx_chunk(dma_addr_t mapping, struct rx_desc *d,
+                                   unsigned int gen)
+{
+        d->addr_lo = cpu_to_be32(mapping);
+        d->addr_hi = cpu_to_be32((u64) mapping >> 32);
+        wmb();
+        d->len_gen = cpu_to_be32(V_FLD_GEN1(gen));
+        d->gen2 = cpu_to_be32(V_FLD_GEN2(gen));
+        return 0;
+}
+
+static int alloc_pg_chunk(struct adapter *adapter, struct sge_fl *q,
+                          struct rx_sw_desc *sd, gfp_t gfp,
                           unsigned int order)
 {
         if (!q->pg_chunk.page) {
+                dma_addr_t mapping;
+
                 q->pg_chunk.page = alloc_pages(gfp, order);
                 if (unlikely(!q->pg_chunk.page))
                         return -ENOMEM;
                 q->pg_chunk.va = page_address(q->pg_chunk.page);
+                q->pg_chunk.p_cnt = q->pg_chunk.va + (PAGE_SIZE << order) -
+                                    SGE_PG_RSVD;
                 q->pg_chunk.offset = 0;
+                mapping = pci_map_page(adapter->pdev, q->pg_chunk.page,
+                                       0, q->alloc_size, PCI_DMA_FROMDEVICE);
+                pci_unmap_addr_set(&q->pg_chunk, mapping, mapping);
         }
         sd->pg_chunk = q->pg_chunk;
 
+        prefetch(sd->pg_chunk.p_cnt);
+
         q->pg_chunk.offset += q->buf_size;
         if (q->pg_chunk.offset == (PAGE_SIZE << order))
                 q->pg_chunk.page = NULL;
@@ -436,6 +467,12 @@ static int alloc_pg_chunk(struct sge_fl *q, struct rx_sw_desc *sd, gfp_t gfp,
                 q->pg_chunk.va += q->buf_size;
                 get_page(q->pg_chunk.page);
         }
+
+        if (sd->pg_chunk.offset == 0)
+                *sd->pg_chunk.p_cnt = 1;
+        else
+                *sd->pg_chunk.p_cnt += 1;
+
         return 0;
 }
 
@@ -460,35 +497,43 @@ static inline void ring_fl_db(struct adapter *adap, struct sge_fl *q)
  */
 static int refill_fl(struct adapter *adap, struct sge_fl *q, int n, gfp_t gfp)
 {
-        void *buf_start;
         struct rx_sw_desc *sd = &q->sdesc[q->pidx];
         struct rx_desc *d = &q->desc[q->pidx];
         unsigned int count = 0;
 
         while (n--) {
+                dma_addr_t mapping;
                 int err;
 
                 if (q->use_pages) {
-                        if (unlikely(alloc_pg_chunk(q, sd, gfp, q->order))) {
+                        if (unlikely(alloc_pg_chunk(adap, q, sd, gfp,
+                                                    q->order))) {
 nomem:                          q->alloc_failed++;
                                 break;
                         }
-                        buf_start = sd->pg_chunk.va;
+                        mapping = pci_unmap_addr(&sd->pg_chunk, mapping) +
+                                                 sd->pg_chunk.offset;
+                        pci_unmap_addr_set(sd, dma_addr, mapping);
+
+                        add_one_rx_chunk(mapping, d, q->gen);
+                        pci_dma_sync_single_for_device(adap->pdev, mapping,
+                                                q->buf_size - SGE_PG_RSVD,
+                                                PCI_DMA_FROMDEVICE);
                 } else {
-                        struct sk_buff *skb = alloc_skb(q->buf_size, gfp);
+                        void *buf_start;
 
+                        struct sk_buff *skb = alloc_skb(q->buf_size, gfp);
                         if (!skb)
                                 goto nomem;
 
                         sd->skb = skb;
                         buf_start = skb->data;
-                }
-
-                err = add_one_rx_buf(buf_start, q->buf_size, d, sd, q->gen,
-                                     adap->pdev);
-                if (unlikely(err)) {
-                        clear_rx_desc(q, sd);
-                        break;
+                        err = add_one_rx_buf(buf_start, q->buf_size, d, sd,
+                                             q->gen, adap->pdev);
+                        if (unlikely(err)) {
+                                clear_rx_desc(adap->pdev, q, sd);
+                                break;
+                        }
                 }
 
                 d++;
@@ -795,19 +840,19 @@ static struct sk_buff *get_packet_pg(struct adapter *adap, struct sge_fl *fl,
         struct sk_buff *newskb, *skb;
         struct rx_sw_desc *sd = &fl->sdesc[fl->cidx];
 
-        newskb = skb = q->pg_skb;
+        dma_addr_t dma_addr = pci_unmap_addr(sd, dma_addr);
 
+        newskb = skb = q->pg_skb;
         if (!skb && (len <= SGE_RX_COPY_THRES)) {
                 newskb = alloc_skb(len, GFP_ATOMIC);
                 if (likely(newskb != NULL)) {
                         __skb_put(newskb, len);
-                        pci_dma_sync_single_for_cpu(adap->pdev,
-                                            pci_unmap_addr(sd, dma_addr), len,
+                        pci_dma_sync_single_for_cpu(adap->pdev, dma_addr, len,
                                             PCI_DMA_FROMDEVICE);
                         memcpy(newskb->data, sd->pg_chunk.va, len);
-                        pci_dma_sync_single_for_device(adap->pdev,
-                                            pci_unmap_addr(sd, dma_addr), len,
-                                            PCI_DMA_FROMDEVICE);
+                        pci_dma_sync_single_for_device(adap->pdev, dma_addr,
+                                                       len,
+                                                       PCI_DMA_FROMDEVICE);
                 } else if (!drop_thres)
                         return NULL;
 recycle:
@@ -820,16 +865,25 @@ recycle:
         if (unlikely(q->rx_recycle_buf || (!skb && fl->credits <= drop_thres)))
                 goto recycle;
 
+        prefetch(sd->pg_chunk.p_cnt);
+
         if (!skb)
                 newskb = alloc_skb(SGE_RX_PULL_LEN, GFP_ATOMIC);
+
         if (unlikely(!newskb)) {
                 if (!drop_thres)
                         return NULL;
                 goto recycle;
         }
 
-        pci_unmap_single(adap->pdev, pci_unmap_addr(sd, dma_addr),
-                         fl->buf_size, PCI_DMA_FROMDEVICE);
+        pci_dma_sync_single_for_cpu(adap->pdev, dma_addr, len,
+                                    PCI_DMA_FROMDEVICE);
+        (*sd->pg_chunk.p_cnt)--;
+        if (!*sd->pg_chunk.p_cnt)
+                pci_unmap_page(adap->pdev,
+                               pci_unmap_addr(&sd->pg_chunk, mapping),
+                               fl->alloc_size,
+                               PCI_DMA_FROMDEVICE);
         if (!skb) {
                 __skb_put(newskb, SGE_RX_PULL_LEN);
                 memcpy(newskb->data, sd->pg_chunk.va, SGE_RX_PULL_LEN);
@@ -1089,7 +1143,7 @@ static void write_tx_pkt_wr(struct adapter *adap, struct sk_buff *skb,
         struct tx_desc *d = &q->desc[pidx];
         struct cpl_tx_pkt *cpl = (struct cpl_tx_pkt *)d;
 
-        cpl->len = htonl(skb->len | 0x80000000);
+        cpl->len = htonl(skb->len);
         cntrl = V_TXPKT_INTF(pi->port_id);
 
         if (vlan_tx_tag_present(skb) && pi->vlan_grp)
@@ -1958,8 +2012,8 @@ static void rx_eth(struct adapter *adap, struct sge_rspq *rq,
         skb_pull(skb, sizeof(*p) + pad);
         skb->protocol = eth_type_trans(skb, adap->port[p->iff]);
         pi = netdev_priv(skb->dev);
-        if ((pi->rx_offload & T3_RX_CSUM) && p->csum_valid && p->csum == htons(0xffff) &&
-            !p->fragment) {
+        if ((pi->rx_offload & T3_RX_CSUM) && p->csum_valid &&
+            p->csum == htons(0xffff) && !p->fragment) {
                 qs->port_stats[SGE_PSTAT_RX_CSUM_GOOD]++;
                 skb->ip_summed = CHECKSUM_UNNECESSARY;
         } else
@@ -2034,10 +2088,19 @@ static void lro_add_page(struct adapter *adap, struct sge_qset *qs,
         fl->credits--;
 
         len -= offset;
-        pci_unmap_single(adap->pdev, pci_unmap_addr(sd, dma_addr),
-                         fl->buf_size, PCI_DMA_FROMDEVICE);
+        pci_dma_sync_single_for_cpu(adap->pdev,
+                                    pci_unmap_addr(sd, dma_addr),
+                                    fl->buf_size - SGE_PG_RSVD,
+                                    PCI_DMA_FROMDEVICE);
 
-        prefetch(&qs->lro_frag_tbl);
+        (*sd->pg_chunk.p_cnt)--;
+        if (!*sd->pg_chunk.p_cnt)
+                pci_unmap_page(adap->pdev,
+                               pci_unmap_addr(&sd->pg_chunk, mapping),
+                               fl->alloc_size,
+                               PCI_DMA_FROMDEVICE);
+
+        prefetch(qs->lro_va);
 
         rx_frag += nr_frags;
         rx_frag->page = sd->pg_chunk.page;
@@ -2047,6 +2110,7 @@ static void lro_add_page(struct adapter *adap, struct sge_qset *qs,
         qs->lro_frag_tbl.nr_frags++;
         qs->lro_frag_tbl.len = frag_len;
 
+
         if (!complete)
                 return;
 
@@ -2236,6 +2300,8 @@ no_mem:
                         if (fl->use_pages) {
                                 void *addr = fl->sdesc[fl->cidx].pg_chunk.va;
 
+                                prefetch(&qs->lro_frag_tbl);
+
                                 prefetch(addr);
 #if L1_CACHE_BYTES < 128
                                 prefetch(addr + L1_CACHE_BYTES);
@@ -2972,21 +3038,23 @@ int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
         q->fl[1].use_pages = FL1_PG_CHUNK_SIZE > 0;
         q->fl[0].order = FL0_PG_ORDER;
         q->fl[1].order = FL1_PG_ORDER;
+        q->fl[0].alloc_size = FL0_PG_ALLOC_SIZE;
+        q->fl[1].alloc_size = FL1_PG_ALLOC_SIZE;
 
         spin_lock_irq(&adapter->sge.reg_lock);
 
         /* FL threshold comparison uses < */
         ret = t3_sge_init_rspcntxt(adapter, q->rspq.cntxt_id, irq_vec_idx,
                                    q->rspq.phys_addr, q->rspq.size,
-                                   q->fl[0].buf_size, 1, 0);
+                                   q->fl[0].buf_size - SGE_PG_RSVD, 1, 0);
         if (ret)
                 goto err_unlock;
 
         for (i = 0; i < SGE_RXQ_PER_SET; ++i) {
                 ret = t3_sge_init_flcntxt(adapter, q->fl[i].cntxt_id, 0,
                                           q->fl[i].phys_addr, q->fl[i].size,
-                                          q->fl[i].buf_size, p->cong_thres, 1,
-                                          0);
+                                          q->fl[i].buf_size - SGE_PG_RSVD,
+                                          p->cong_thres, 1, 0);
                 if (ret)
                         goto err_unlock;
         }
@@ -3044,9 +3112,6 @@ int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
         t3_write_reg(adapter, A_SG_GTS, V_RSPQ(q->rspq.cntxt_id) |
                      V_NEWTIMER(q->rspq.holdoff_tmr));
 
-        mod_timer(&q->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD);
-        mod_timer(&q->rx_reclaim_timer, jiffies + RX_RECLAIM_PERIOD);
-
         return 0;
 
 err_unlock:
@@ -3057,6 +3122,27 @@ err:
 }
 
 /**
+ *      t3_start_sge_timers - start SGE timer call backs
+ *      @adap: the adapter
+ *
+ *      Starts each SGE queue set's timer call back
+ */
+void t3_start_sge_timers(struct adapter *adap)
+{
+        int i;
+
+        for (i = 0; i < SGE_QSETS; ++i) {
+                struct sge_qset *q = &adap->sge.qs[i];
+
+        if (q->tx_reclaim_timer.function)
+                mod_timer(&q->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD);
+
+        if (q->rx_reclaim_timer.function)
+                mod_timer(&q->rx_reclaim_timer, jiffies + RX_RECLAIM_PERIOD);
+        }
+}
+
+/**
  *      t3_stop_sge_timers - stop SGE timer call backs
  *      @adap: the adapter
  *
diff --git a/drivers/net/cxgb3/t3_hw.c b/drivers/net/cxgb3/t3_hw.c
index ff262a04ded0..31ed31a3428b 100644
--- a/drivers/net/cxgb3/t3_hw.c
+++ b/drivers/net/cxgb3/t3_hw.c
@@ -493,20 +493,20 @@ int t3_phy_lasi_intr_handler(struct cphy *phy)
 }
 
 static const struct adapter_info t3_adap_info[] = {
-        {2, 0,
+        {1, 1, 0,
          F_GPIO2_OEN | F_GPIO4_OEN |
          F_GPIO2_OUT_VAL | F_GPIO4_OUT_VAL, { S_GPIO3, S_GPIO5 }, 0,
          &mi1_mdio_ops, "Chelsio PE9000"},
-        {2, 0,
+        {1, 1, 0,
          F_GPIO2_OEN | F_GPIO4_OEN |
          F_GPIO2_OUT_VAL | F_GPIO4_OUT_VAL, { S_GPIO3, S_GPIO5 }, 0,
          &mi1_mdio_ops, "Chelsio T302"},
-        {1, 0,
+        {1, 0, 0,
          F_GPIO1_OEN | F_GPIO6_OEN | F_GPIO7_OEN | F_GPIO10_OEN |
          F_GPIO11_OEN | F_GPIO1_OUT_VAL | F_GPIO6_OUT_VAL | F_GPIO10_OUT_VAL,
          { 0 }, SUPPORTED_10000baseT_Full | SUPPORTED_AUI,
          &mi1_mdio_ext_ops, "Chelsio T310"},
-        {2, 0,
+        {1, 1, 0,
          F_GPIO1_OEN | F_GPIO2_OEN | F_GPIO4_OEN | F_GPIO5_OEN | F_GPIO6_OEN |
          F_GPIO7_OEN | F_GPIO10_OEN | F_GPIO11_OEN | F_GPIO1_OUT_VAL |
          F_GPIO5_OUT_VAL | F_GPIO6_OUT_VAL | F_GPIO10_OUT_VAL,
@@ -514,7 +514,7 @@ static const struct adapter_info t3_adap_info[] = {
          &mi1_mdio_ext_ops, "Chelsio T320"},
         {},
         {},
-        {1, 0,
+        {1, 0, 0,
          F_GPIO1_OEN | F_GPIO2_OEN | F_GPIO4_OEN | F_GPIO6_OEN | F_GPIO7_OEN |
          F_GPIO10_OEN | F_GPIO1_OUT_VAL | F_GPIO6_OUT_VAL | F_GPIO10_OUT_VAL,
          { S_GPIO9 }, SUPPORTED_10000baseT_Full | SUPPORTED_AUI,
@@ -2128,16 +2128,40 @@ void t3_port_intr_clear(struct adapter *adapter, int idx)
 static int t3_sge_write_context(struct adapter *adapter, unsigned int id,
                                 unsigned int type)
 {
-        t3_write_reg(adapter, A_SG_CONTEXT_MASK0, 0xffffffff);
-        t3_write_reg(adapter, A_SG_CONTEXT_MASK1, 0xffffffff);
-        t3_write_reg(adapter, A_SG_CONTEXT_MASK2, 0xffffffff);
-        t3_write_reg(adapter, A_SG_CONTEXT_MASK3, 0xffffffff);
+        if (type == F_RESPONSEQ) {
+                /*
+                 * Can't write the Response Queue Context bits for
+                 * Interrupt Armed or the Reserve bits after the chip
+                 * has been initialized out of reset.  Writing to these
+                 * bits can confuse the hardware.
+                 */
+                t3_write_reg(adapter, A_SG_CONTEXT_MASK0, 0xffffffff);
+                t3_write_reg(adapter, A_SG_CONTEXT_MASK1, 0xffffffff);
+                t3_write_reg(adapter, A_SG_CONTEXT_MASK2, 0x17ffffff);
+                t3_write_reg(adapter, A_SG_CONTEXT_MASK3, 0xffffffff);
+        } else {
+                t3_write_reg(adapter, A_SG_CONTEXT_MASK0, 0xffffffff);
+                t3_write_reg(adapter, A_SG_CONTEXT_MASK1, 0xffffffff);
+                t3_write_reg(adapter, A_SG_CONTEXT_MASK2, 0xffffffff);
+                t3_write_reg(adapter, A_SG_CONTEXT_MASK3, 0xffffffff);
+        }
         t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                      V_CONTEXT_CMD_OPCODE(1) | type | V_CONTEXT(id));
         return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
                                0, SG_CONTEXT_CMD_ATTEMPTS, 1);
 }
 
+/**
+ *      clear_sge_ctxt - completely clear an SGE context
+ *      @adapter: the adapter
+ *      @id: the context id
+ *      @type: the context type
+ *
+ *      Completely clear an SGE context.  Used predominantly at post-reset
+ *      initialization.  Note in particular that we don't skip writing to any
+ *      "sensitive bits" in the contexts the way that t3_sge_write_context()
+ *      does ...
+ */
 static int clear_sge_ctxt(struct adapter *adap, unsigned int id,
                           unsigned int type)
 {
@@ -2145,7 +2169,14 @@ static int clear_sge_ctxt(struct adapter *adap, unsigned int id,
         t3_write_reg(adap, A_SG_CONTEXT_DATA1, 0);
         t3_write_reg(adap, A_SG_CONTEXT_DATA2, 0);
         t3_write_reg(adap, A_SG_CONTEXT_DATA3, 0);
-        return t3_sge_write_context(adap, id, type);
+        t3_write_reg(adap, A_SG_CONTEXT_MASK0, 0xffffffff);
+        t3_write_reg(adap, A_SG_CONTEXT_MASK1, 0xffffffff);
+        t3_write_reg(adap, A_SG_CONTEXT_MASK2, 0xffffffff);
+        t3_write_reg(adap, A_SG_CONTEXT_MASK3, 0xffffffff);
+        t3_write_reg(adap, A_SG_CONTEXT_CMD,
+                     V_CONTEXT_CMD_OPCODE(1) | type | V_CONTEXT(id));
+        return t3_wait_op_done(adap, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
+                               0, SG_CONTEXT_CMD_ATTEMPTS, 1);
 }
 
 /**
@@ -2729,10 +2760,10 @@ static void tp_config(struct adapter *adap, const struct tp_params *p)
                      F_TCPCHECKSUMOFFLOAD | V_IPTTL(64));
         t3_write_reg(adap, A_TP_TCP_OPTIONS, V_MTUDEFAULT(576) |
                      F_MTUENABLE | V_WINDOWSCALEMODE(1) |
-                     V_TIMESTAMPSMODE(0) | V_SACKMODE(1) | V_SACKRX(1));
+                     V_TIMESTAMPSMODE(1) | V_SACKMODE(1) | V_SACKRX(1));
         t3_write_reg(adap, A_TP_DACK_CONFIG, V_AUTOSTATE3(1) |
                      V_AUTOSTATE2(1) | V_AUTOSTATE1(0) |
-                     V_BYTETHRESHOLD(16384) | V_MSSTHRESHOLD(2) |
+                     V_BYTETHRESHOLD(26880) | V_MSSTHRESHOLD(2) |
                      F_AUTOCAREFUL | F_AUTOENABLE | V_DACK_MODE(1));
         t3_set_reg_field(adap, A_TP_IN_CONFIG, F_RXFBARBPRIO | F_TXFBARBPRIO,
                          F_IPV6ENABLE | F_NICMODE);
@@ -3196,20 +3227,22 @@ int t3_mps_set_active_ports(struct adapter *adap, unsigned int port_mask)
 }
 
 /*
- * Perform the bits of HW initialization that are dependent on the number
- * of available ports.
+ * Perform the bits of HW initialization that are dependent on the Tx
+ * channels being used.
  */
-static void init_hw_for_avail_ports(struct adapter *adap, int nports)
+static void chan_init_hw(struct adapter *adap, unsigned int chan_map)
 {
         int i;
 
-        if (nports == 1) {
+        if (chan_map != 3) {                                 /* one channel */
                 t3_set_reg_field(adap, A_ULPRX_CTL, F_ROUND_ROBIN, 0);
                 t3_set_reg_field(adap, A_ULPTX_CONFIG, F_CFG_RR_ARB, 0);
-                t3_write_reg(adap, A_MPS_CFG, F_TPRXPORTEN | F_TPTXPORT0EN |
-                             F_PORT0ACTIVE | F_ENFORCEPKT);
-                t3_write_reg(adap, A_PM1_TX_CFG, 0xffffffff);
-        } else {
+                t3_write_reg(adap, A_MPS_CFG, F_TPRXPORTEN | F_ENFORCEPKT |
+                             (chan_map == 1 ? F_TPTXPORT0EN | F_PORT0ACTIVE :
+                                              F_TPTXPORT1EN | F_PORT1ACTIVE));
+                t3_write_reg(adap, A_PM1_TX_CFG,
+                             chan_map == 1 ? 0xffffffff : 0);
+        } else {                                             /* two channels */
                 t3_set_reg_field(adap, A_ULPRX_CTL, 0, F_ROUND_ROBIN);
                 t3_set_reg_field(adap, A_ULPTX_CONFIG, 0, F_CFG_RR_ARB);
                 t3_write_reg(adap, A_ULPTX_DMA_WEIGHT,
@@ -3517,7 +3550,7 @@ int t3_init_hw(struct adapter *adapter, u32 fw_params)
         t3_write_reg(adapter, A_PM1_RX_CFG, 0xffffffff);
         t3_write_reg(adapter, A_PM1_RX_MODE, 0);
         t3_write_reg(adapter, A_PM1_TX_MODE, 0);
-        init_hw_for_avail_ports(adapter, adapter->params.nports);
+        chan_init_hw(adapter, adapter->params.chan_map);
         t3_sge_init(adapter, &adapter->params.sge);
 
         t3_write_reg(adapter, A_T3DBG_GPIO_ACT_LOW, calc_gpio_intr(adapter));
@@ -3754,7 +3787,8 @@ int t3_prep_adapter(struct adapter *adapter, const struct adapter_info *ai,
         get_pci_mode(adapter, &adapter->params.pci);
 
         adapter->params.info = ai;
-        adapter->params.nports = ai->nports;
+        adapter->params.nports = ai->nports0 + ai->nports1;
+        adapter->params.chan_map = !!ai->nports0 | (!!ai->nports1 << 1);
         adapter->params.rev = t3_read_reg(adapter, A_PL_REV);
         /*
          * We used to only run the "adapter check task" once a second if
@@ -3785,7 +3819,7 @@ int t3_prep_adapter(struct adapter *adapter, const struct adapter_info *ai,
                 mc7_prep(adapter, &adapter->pmtx, MC7_PMTX_BASE_ADDR, "PMTX");
                 mc7_prep(adapter, &adapter->cm, MC7_CM_BASE_ADDR, "CM");
 
-                p->nchan = ai->nports;
+                p->nchan = adapter->params.chan_map == 3 ? 2 : 1;
                 p->pmrx_size = t3_mc7_size(&adapter->pmrx);
                 p->pmtx_size = t3_mc7_size(&adapter->pmtx);
                 p->cm_size = t3_mc7_size(&adapter->cm);