cxgb4vf: Move fl_starv_thres into adapter->sge data structure

Move fl_starv_thres into adapter->sge data structure since it
_could_ be different from adapter to adapter.  Also move other per-adapter
SGE values which had been treated as driver globals into adapter->sge.

Based on original work by Casey Leedom <leedom@chelsio.com>

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 61 insertions, 40 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h b/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h
index 68eaa9c88c7d..3d06e77d7121 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h
@@ -299,6 +299,14 @@ struct sge {
         u16 timer_val[SGE_NTIMERS];     /* interrupt holdoff timer array */
         u8 counter_val[SGE_NCOUNTERS];  /* interrupt RX threshold array */
 
+        /* Decoded Adapter Parameters.
+         */
+        u32 fl_pg_order;                /* large page allocation size */
+        u32 stat_len;                   /* length of status page at ring end */
+        u32 pktshift;                   /* padding between CPL & packet data */
+        u32 fl_align;                   /* response queue message alignment */
+        u32 fl_starve_thres;            /* Free List starvation threshold */
+
         /*
          * Reverse maps from Absolute Queue IDs to associated queue pointers.
          * The absolute Queue IDs are in a compact range which start at a
diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
index 85036e6b42c4..a18830d8aa6d 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
@@ -51,14 +51,6 @@
 #include "../cxgb4/t4_msg.h"
 
 /*
- * Decoded Adapter Parameters.
- */
-static u32 FL_PG_ORDER;         /* large page allocation size */
-static u32 STAT_LEN;            /* length of status page at ring end */
-static u32 PKTSHIFT;            /* padding between CPL and packet data */
-static u32 FL_ALIGN;            /* response queue message alignment */
-
-/*
  * Constants ...
  */
 enum {
@@ -264,15 +256,19 @@ static inline unsigned int fl_cap(const struct sge_fl *fl)
 
 /**
  *      fl_starving - return whether a Free List is starving.
+ *      @adapter: pointer to the adapter
  *      @fl: the Free List
  *
  *      Tests specified Free List to see whether the number of buffers
  *      available to the hardware has falled below our "starvation"
  *      threshold.
  */
-static inline bool fl_starving(const struct sge_fl *fl)
+static inline bool fl_starving(const struct adapter *adapter,
+                               const struct sge_fl *fl)
 {
-        return fl->avail - fl->pend_cred <= FL_STARVE_THRES;
+        const struct sge *s = &adapter->sge;
+
+        return fl->avail - fl->pend_cred <= s->fl_starve_thres;
 }
 
 /**
@@ -457,13 +453,16 @@ static inline void reclaim_completed_tx(struct adapter *adapter,
 
 /**
  *      get_buf_size - return the size of an RX Free List buffer.
+ *      @adapter: pointer to the associated adapter
  *      @sdesc: pointer to the software buffer descriptor
  */
-static inline int get_buf_size(const struct rx_sw_desc *sdesc)
+static inline int get_buf_size(const struct adapter *adapter,
+                               const struct rx_sw_desc *sdesc)
 {
-        return FL_PG_ORDER > 0 && (sdesc->dma_addr & RX_LARGE_BUF)
-                ? (PAGE_SIZE << FL_PG_ORDER)
-                : PAGE_SIZE;
+        const struct sge *s = &adapter->sge;
+
+        return (s->fl_pg_order > 0 && (sdesc->dma_addr & RX_LARGE_BUF)
+                ? (PAGE_SIZE << s->fl_pg_order) : PAGE_SIZE);
 }
 
 /**
@@ -483,7 +482,8 @@ static void free_rx_bufs(struct adapter *adapter, struct sge_fl *fl, int n)
 
                 if (is_buf_mapped(sdesc))
                         dma_unmap_page(adapter->pdev_dev, get_buf_addr(sdesc),
-                                       get_buf_size(sdesc), PCI_DMA_FROMDEVICE);
+                                       get_buf_size(adapter, sdesc),
+                                       PCI_DMA_FROMDEVICE);
                 put_page(sdesc->page);
                 sdesc->page = NULL;
                 if (++fl->cidx == fl->size)
@@ -511,7 +511,8 @@ static void unmap_rx_buf(struct adapter *adapter, struct sge_fl *fl)
 
         if (is_buf_mapped(sdesc))
                 dma_unmap_page(adapter->pdev_dev, get_buf_addr(sdesc),
-                               get_buf_size(sdesc), PCI_DMA_FROMDEVICE);
+                               get_buf_size(adapter, sdesc),
+                               PCI_DMA_FROMDEVICE);
         sdesc->page = NULL;
         if (++fl->cidx == fl->size)
                 fl->cidx = 0;
@@ -589,6 +590,7 @@ static inline void poison_buf(struct page *page, size_t sz)
 static unsigned int refill_fl(struct adapter *adapter, struct sge_fl *fl,
                               int n, gfp_t gfp)
 {
+        struct sge *s = &adapter->sge;
         struct page *page;
         dma_addr_t dma_addr;
         unsigned int cred = fl->avail;
@@ -608,12 +610,12 @@ static unsigned int refill_fl(struct adapter *adapter, struct sge_fl *fl,
          * If we don't support large pages, drop directly into the small page
          * allocation code.
          */
-        if (FL_PG_ORDER == 0)
+        if (s->fl_pg_order == 0)
                 goto alloc_small_pages;
 
         while (n) {
                 page = alloc_pages(gfp | __GFP_COMP | __GFP_NOWARN,
-                                   FL_PG_ORDER);
+                                   s->fl_pg_order);
                 if (unlikely(!page)) {
                         /*
                          * We've failed inour attempt to allocate a "large
@@ -623,10 +625,10 @@ static unsigned int refill_fl(struct adapter *adapter, struct sge_fl *fl,
                         fl->large_alloc_failed++;
                         break;
                 }
-                poison_buf(page, PAGE_SIZE << FL_PG_ORDER);
+                poison_buf(page, PAGE_SIZE << s->fl_pg_order);
 
                 dma_addr = dma_map_page(adapter->pdev_dev, page, 0,
-                                        PAGE_SIZE << FL_PG_ORDER,
+                                        PAGE_SIZE << s->fl_pg_order,
                                         PCI_DMA_FROMDEVICE);
                 if (unlikely(dma_mapping_error(adapter->pdev_dev, dma_addr))) {
                         /*
@@ -637,7 +639,7 @@ static unsigned int refill_fl(struct adapter *adapter, struct sge_fl *fl,
                          * because DMA mapping resources are typically
                          * critical resources once they become scarse.
                          */
-                        __free_pages(page, FL_PG_ORDER);
+                        __free_pages(page, s->fl_pg_order);
                         goto out;
                 }
                 dma_addr |= RX_LARGE_BUF;
@@ -693,7 +695,7 @@ out:
         fl->pend_cred += cred;
         ring_fl_db(adapter, fl);
 
-        if (unlikely(fl_starving(fl))) {
+        if (unlikely(fl_starving(adapter, fl))) {
                 smp_wmb();
                 set_bit(fl->cntxt_id, adapter->sge.starving_fl);
         }
@@ -1468,6 +1470,8 @@ static void t4vf_pktgl_free(const struct pkt_gl *gl)
 static void do_gro(struct sge_eth_rxq *rxq, const struct pkt_gl *gl,
                    const struct cpl_rx_pkt *pkt)
 {
+        struct adapter *adapter = rxq->rspq.adapter;
+        struct sge *s = &adapter->sge;
         int ret;
         struct sk_buff *skb;
 
@@ -1478,8 +1482,8 @@ static void do_gro(struct sge_eth_rxq *rxq, const struct pkt_gl *gl,
                 return;
         }
 
-        copy_frags(skb, gl, PKTSHIFT);
-        skb->len = gl->tot_len - PKTSHIFT;
+        copy_frags(skb, gl, s->pktshift);
+        skb->len = gl->tot_len - s->pktshift;
         skb->data_len = skb->len;
         skb->truesize += skb->data_len;
         skb->ip_summed = CHECKSUM_UNNECESSARY;
@@ -1516,6 +1520,8 @@ int t4vf_ethrx_handler(struct sge_rspq *rspq, const __be64 *rsp,
         bool csum_ok = pkt->csum_calc && !pkt->err_vec &&
                        (rspq->netdev->features & NETIF_F_RXCSUM);
         struct sge_eth_rxq *rxq = container_of(rspq, struct sge_eth_rxq, rspq);
+        struct adapter *adapter = rspq->adapter;
+        struct sge *s = &adapter->sge;
 
         /*
          * If this is a good TCP packet and we have Generic Receive Offload
@@ -1537,7 +1543,7 @@ int t4vf_ethrx_handler(struct sge_rspq *rspq, const __be64 *rsp,
                 rxq->stats.rx_drops++;
                 return 0;
         }
-        __skb_pull(skb, PKTSHIFT);
+        __skb_pull(skb, s->pktshift);
         skb->protocol = eth_type_trans(skb, rspq->netdev);
         skb_record_rx_queue(skb, rspq->idx);
         rxq->stats.pkts++;
@@ -1648,6 +1654,8 @@ static inline void rspq_next(struct sge_rspq *rspq)
 static int process_responses(struct sge_rspq *rspq, int budget)
 {
         struct sge_eth_rxq *rxq = container_of(rspq, struct sge_eth_rxq, rspq);
+        struct adapter *adapter = rspq->adapter;
+        struct sge *s = &adapter->sge;
         int budget_left = budget;
 
         while (likely(budget_left)) {
@@ -1697,7 +1705,7 @@ static int process_responses(struct sge_rspq *rspq, int budget)
                                 BUG_ON(frag >= MAX_SKB_FRAGS);
                                 BUG_ON(rxq->fl.avail == 0);
                                 sdesc = &rxq->fl.sdesc[rxq->fl.cidx];
-                                bufsz = get_buf_size(sdesc);
+                                bufsz = get_buf_size(adapter, sdesc);
                                 fp->page = sdesc->page;
                                 fp->offset = rspq->offset;
                                 fp->size = min(bufsz, len);
@@ -1726,7 +1734,7 @@ static int process_responses(struct sge_rspq *rspq, int budget)
                          */
                         ret = rspq->handler(rspq, rspq->cur_desc, &gl);
                         if (likely(ret == 0))
-                                rspq->offset += ALIGN(fp->size, FL_ALIGN);
+                                rspq->offset += ALIGN(fp->size, s->fl_align);
                         else
                                 restore_rx_bufs(&gl, &rxq->fl, frag);
                 } else if (likely(rsp_type == RSP_TYPE_CPL)) {
@@ -1963,7 +1971,7 @@ static void sge_rx_timer_cb(unsigned long data)
                          * schedule napi but the FL is no longer starving.
                          * No biggie.
                          */
-                        if (fl_starving(fl)) {
+                        if (fl_starving(adapter, fl)) {
                                 struct sge_eth_rxq *rxq;
 
                                 rxq = container_of(fl, struct sge_eth_rxq, fl);
@@ -2047,6 +2055,7 @@ int t4vf_sge_alloc_rxq(struct adapter *adapter, struct sge_rspq *rspq,
                        int intr_dest,
                        struct sge_fl *fl, rspq_handler_t hnd)
 {
+        struct sge *s = &adapter->sge;
         struct port_info *pi = netdev_priv(dev);
         struct fw_iq_cmd cmd, rpl;
         int ret, iqandst, flsz = 0;
@@ -2117,7 +2126,7 @@ int t4vf_sge_alloc_rxq(struct adapter *adapter, struct sge_rspq *rspq,
                 fl->size = roundup(fl->size, FL_PER_EQ_UNIT);
                 fl->desc = alloc_ring(adapter->pdev_dev, fl->size,
                                       sizeof(__be64), sizeof(struct rx_sw_desc),
-                                      &fl->addr, &fl->sdesc, STAT_LEN);
+                                      &fl->addr, &fl->sdesc, s->stat_len);
                 if (!fl->desc) {
                         ret = -ENOMEM;
                         goto err;
@@ -2129,7 +2138,7 @@ int t4vf_sge_alloc_rxq(struct adapter *adapter, struct sge_rspq *rspq,
                  * free list ring) in Egress Queue Units.
                  */
                 flsz = (fl->size / FL_PER_EQ_UNIT +
-                        STAT_LEN / EQ_UNIT);
+                        s->stat_len / EQ_UNIT);
 
                 /*
                  * Fill in all the relevant firmware Ingress Queue Command
@@ -2217,6 +2226,7 @@ int t4vf_sge_alloc_eth_txq(struct adapter *adapter, struct sge_eth_txq *txq,
                            struct net_device *dev, struct netdev_queue *devq,
                            unsigned int iqid)
 {
+        struct sge *s = &adapter->sge;
         int ret, nentries;
         struct fw_eq_eth_cmd cmd, rpl;
         struct port_info *pi = netdev_priv(dev);
@@ -2225,7 +2235,7 @@ int t4vf_sge_alloc_eth_txq(struct adapter *adapter, struct sge_eth_txq *txq,
          * Calculate the size of the hardware TX Queue (including the Status
          * Page on the end of the TX Queue) in units of TX Descriptors.
          */
-        nentries = txq->q.size + STAT_LEN / sizeof(struct tx_desc);
+        nentries = txq->q.size + s->stat_len / sizeof(struct tx_desc);
 
         /*
          * Allocate the hardware ring for the TX ring (with space for its
@@ -2234,7 +2244,7 @@ int t4vf_sge_alloc_eth_txq(struct adapter *adapter, struct sge_eth_txq *txq,
         txq->q.desc = alloc_ring(adapter->pdev_dev, txq->q.size,
                                  sizeof(struct tx_desc),
                                  sizeof(struct tx_sw_desc),
-                                 &txq->q.phys_addr, &txq->q.sdesc, STAT_LEN);
+                                 &txq->q.phys_addr, &txq->q.sdesc, s->stat_len);
         if (!txq->q.desc)
                 return -ENOMEM;
 
@@ -2307,8 +2317,10 @@ int t4vf_sge_alloc_eth_txq(struct adapter *adapter, struct sge_eth_txq *txq,
  */
 static void free_txq(struct adapter *adapter, struct sge_txq *tq)
 {
+        struct sge *s = &adapter->sge;
+
         dma_free_coherent(adapter->pdev_dev,
-                          tq->size * sizeof(*tq->desc) + STAT_LEN,
+                          tq->size * sizeof(*tq->desc) + s->stat_len,
                           tq->desc, tq->phys_addr);
         tq->cntxt_id = 0;
         tq->sdesc = NULL;
@@ -2322,6 +2334,7 @@ static void free_txq(struct adapter *adapter, struct sge_txq *tq)
 static void free_rspq_fl(struct adapter *adapter, struct sge_rspq *rspq,
                          struct sge_fl *fl)
 {
+        struct sge *s = &adapter->sge;
         unsigned int flid = fl ? fl->cntxt_id : 0xffff;
 
         t4vf_iq_free(adapter, FW_IQ_TYPE_FL_INT_CAP,
@@ -2337,7 +2350,7 @@ static void free_rspq_fl(struct adapter *adapter, struct sge_rspq *rspq,
         if (fl) {
                 free_rx_bufs(adapter, fl, fl->avail);
                 dma_free_coherent(adapter->pdev_dev,
-                                  fl->size * sizeof(*fl->desc) + STAT_LEN,
+                                  fl->size * sizeof(*fl->desc) + s->stat_len,
                                   fl->desc, fl->addr);
                 kfree(fl->sdesc);
                 fl->sdesc = NULL;
@@ -2443,12 +2456,12 @@ int t4vf_sge_init(struct adapter *adapter)
          * Now translate the adapter parameters into our internal forms.
          */
         if (fl1)
-                FL_PG_ORDER = ilog2(fl1) - PAGE_SHIFT;
-        STAT_LEN = ((sge_params->sge_control & EGRSTATUSPAGESIZE_MASK)
-                    ? 128 : 64);
-        PKTSHIFT = PKTSHIFT_GET(sge_params->sge_control);
-        FL_ALIGN = 1 << (INGPADBOUNDARY_GET(sge_params->sge_control) +
-                         SGE_INGPADBOUNDARY_SHIFT);
+                s->fl_pg_order = ilog2(fl1) - PAGE_SHIFT;
+        s->stat_len = ((sge_params->sge_control & EGRSTATUSPAGESIZE_MASK)
+                        ? 128 : 64);
+        s->pktshift = PKTSHIFT_GET(sge_params->sge_control);
+        s->fl_align = 1 << (INGPADBOUNDARY_GET(sge_params->sge_control) +
+                            SGE_INGPADBOUNDARY_SHIFT);
 
         /*
          * Set up tasklet timers.