[BNX2]: Add init. code to handle RX pages.

Add new fields to keep track of the pages and the page rings.
Add functions to allocate and free pages.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 130 insertions, 2 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index db3b7503bb16..38e8e31cabf3 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -483,6 +483,16 @@ bnx2_free_mem(struct bnx2 *bp)
         }
         vfree(bp->rx_buf_ring);
         bp->rx_buf_ring = NULL;
+        for (i = 0; i < bp->rx_max_pg_ring; i++) {
+                if (bp->rx_pg_desc_ring[i])
+                        pci_free_consistent(bp->pdev, RXBD_RING_SIZE,
+                                            bp->rx_pg_desc_ring[i],
+                                            bp->rx_pg_desc_mapping[i]);
+                bp->rx_pg_desc_ring[i] = NULL;
+        }
+        if (bp->rx_pg_ring)
+                vfree(bp->rx_pg_ring);
+        bp->rx_pg_ring = NULL;
 }
 
 static int
@@ -514,6 +524,25 @@ bnx2_alloc_mem(struct bnx2 *bp)
 
         }
 
+        if (bp->rx_pg_ring_size) {
+                bp->rx_pg_ring = vmalloc(SW_RXPG_RING_SIZE *
+                                         bp->rx_max_pg_ring);
+                if (bp->rx_pg_ring == NULL)
+                        goto alloc_mem_err;
+
+                memset(bp->rx_pg_ring, 0, SW_RXPG_RING_SIZE *
+                       bp->rx_max_pg_ring);
+        }
+
+        for (i = 0; i < bp->rx_max_pg_ring; i++) {
+                bp->rx_pg_desc_ring[i] =
+                        pci_alloc_consistent(bp->pdev, RXBD_RING_SIZE,
+                                             &bp->rx_pg_desc_mapping[i]);
+                if (bp->rx_pg_desc_ring[i] == NULL)
+                        goto alloc_mem_err;
+
+        }
+
         /* Combine status and statistics blocks into one allocation. */
         status_blk_size = L1_CACHE_ALIGN(sizeof(struct status_block));
         bp->status_stats_size = status_blk_size +
@@ -2195,6 +2224,42 @@ bnx2_set_mac_addr(struct bnx2 *bp)
 }
 
 static inline int
+bnx2_alloc_rx_page(struct bnx2 *bp, u16 index)
+{
+        dma_addr_t mapping;
+        struct sw_pg *rx_pg = &bp->rx_pg_ring[index];
+        struct rx_bd *rxbd =
+                &bp->rx_pg_desc_ring[RX_RING(index)][RX_IDX(index)];
+        struct page *page = alloc_page(GFP_ATOMIC);
+
+        if (!page)
+                return -ENOMEM;
+        mapping = pci_map_page(bp->pdev, page, 0, PAGE_SIZE,
+                               PCI_DMA_FROMDEVICE);
+        rx_pg->page = page;
+        pci_unmap_addr_set(rx_pg, mapping, mapping);
+        rxbd->rx_bd_haddr_hi = (u64) mapping >> 32;
+        rxbd->rx_bd_haddr_lo = (u64) mapping & 0xffffffff;
+        return 0;
+}
+
+static void
+bnx2_free_rx_page(struct bnx2 *bp, u16 index)
+{
+        struct sw_pg *rx_pg = &bp->rx_pg_ring[index];
+        struct page *page = rx_pg->page;
+
+        if (!page)
+                return;
+
+        pci_unmap_page(bp->pdev, pci_unmap_addr(rx_pg, mapping), PAGE_SIZE,
+                       PCI_DMA_FROMDEVICE);
+
+        __free_page(page);
+        rx_pg->page = NULL;
+}
+
+static inline int
 bnx2_alloc_rx_skb(struct bnx2 *bp, u16 index)
 {
         struct sk_buff *skb;
@@ -4213,11 +4278,31 @@ bnx2_init_rx_ring(struct bnx2 *bp)
         bp->rx_prod = 0;
         bp->rx_cons = 0;
         bp->rx_prod_bseq = 0;
+        bp->rx_pg_prod = 0;
+        bp->rx_pg_cons = 0;
 
         bnx2_init_rxbd_rings(bp->rx_desc_ring, bp->rx_desc_mapping,
                              bp->rx_buf_use_size, bp->rx_max_ring);
 
         CTX_WR(bp, rx_cid_addr, BNX2_L2CTX_PG_BUF_SIZE, 0);
+        if (bp->rx_pg_ring_size) {
+                bnx2_init_rxbd_rings(bp->rx_pg_desc_ring,
+                                     bp->rx_pg_desc_mapping,
+                                     PAGE_SIZE, bp->rx_max_pg_ring);
+                val = (bp->rx_buf_use_size << 16) | PAGE_SIZE;
+                CTX_WR(bp, rx_cid_addr, BNX2_L2CTX_PG_BUF_SIZE, val);
+                CTX_WR(bp, rx_cid_addr, BNX2_L2CTX_RBDC_KEY,
+                       BNX2_L2CTX_RBDC_JUMBO_KEY);
+
+                val = (u64) bp->rx_pg_desc_mapping[0] >> 32;
+                CTX_WR(bp, rx_cid_addr, BNX2_L2CTX_NX_PG_BDHADDR_HI, val);
+
+                val = (u64) bp->rx_pg_desc_mapping[0] & 0xffffffff;
+                CTX_WR(bp, rx_cid_addr, BNX2_L2CTX_NX_PG_BDHADDR_LO, val);
+
+                if (CHIP_NUM(bp) == CHIP_NUM_5709)
+                        REG_WR(bp, BNX2_MQ_MAP_L2_3, BNX2_MQ_MAP_L2_3_DEFAULT);
+        }
 
         val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE;
         val |= BNX2_L2CTX_CTX_TYPE_SIZE_L2;
@@ -4230,6 +4315,15 @@ bnx2_init_rx_ring(struct bnx2 *bp)
         val = (u64) bp->rx_desc_mapping[0] & 0xffffffff;
         CTX_WR(bp, rx_cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
 
+        ring_prod = prod = bp->rx_pg_prod;
+        for (i = 0; i < bp->rx_pg_ring_size; i++) {
+                if (bnx2_alloc_rx_page(bp, ring_prod) < 0)
+                        break;
+                prod = NEXT_RX_BD(prod);
+                ring_prod = RX_PG_RING_IDX(prod);
+        }
+        bp->rx_pg_prod = prod;
+
         ring_prod = prod = bp->rx_prod;
         for (i = 0; i < bp->rx_ring_size; i++) {
                 if (bnx2_alloc_rx_skb(bp, ring_prod) < 0) {
@@ -4240,6 +4334,7 @@ bnx2_init_rx_ring(struct bnx2 *bp)
         }
         bp->rx_prod = prod;
 
+        REG_WR16(bp, MB_RX_CID_ADDR + BNX2_L2CTX_HOST_PG_BDIDX, bp->rx_pg_prod);
         REG_WR16(bp, MB_RX_CID_ADDR + BNX2_L2CTX_HOST_BDIDX, prod);
 
         REG_WR(bp, MB_RX_CID_ADDR + BNX2_L2CTX_HOST_BSEQ, bp->rx_prod_bseq);
@@ -4273,6 +4368,9 @@ bnx2_set_rx_ring_size(struct bnx2 *bp, u32 size)
         rx_size = bp->dev->mtu + ETH_HLEN + bp->rx_offset + 8;
 
         bp->rx_copy_thresh = RX_COPY_THRESH;
+        bp->rx_pg_ring_size = 0;
+        bp->rx_max_pg_ring = 0;
+        bp->rx_max_pg_ring_idx = 0;
 
         bp->rx_buf_use_size = rx_size;
         /* hw alignment */
@@ -4341,6 +4439,8 @@ bnx2_free_rx_skbs(struct bnx2 *bp)
 
                 dev_kfree_skb(skb);
         }
+        for (i = 0; i < bp->rx_max_pg_ring_idx; i++)
+                bnx2_free_rx_page(bp, i);
 }
 
 static void
@@ -5813,11 +5913,11 @@ bnx2_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ering)
 
         ering->rx_max_pending = MAX_TOTAL_RX_DESC_CNT;
         ering->rx_mini_max_pending = 0;
-        ering->rx_jumbo_max_pending = 0;
+        ering->rx_jumbo_max_pending = MAX_TOTAL_RX_PG_DESC_CNT;
 
         ering->rx_pending = bp->rx_ring_size;
         ering->rx_mini_pending = 0;
-        ering->rx_jumbo_pending = 0;
+        ering->rx_jumbo_pending = bp->rx_pg_ring_size;
 
         ering->tx_max_pending = MAX_TX_DESC_CNT;
         ering->tx_pending = bp->tx_ring_size;
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index 8354efc1111d..93c2436cb8b9 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -335,6 +335,7 @@ struct l2_fhdr {
 #define BNX2_L2CTX_HOST_PG_BDIDX                        0x00000044
 #define BNX2_L2CTX_PG_BUF_SIZE                          0x00000048
 #define BNX2_L2CTX_RBDC_KEY                             0x0000004c
+#define BNX2_L2CTX_RBDC_JUMBO_KEY                        0x3ffe
 #define BNX2_L2CTX_NX_PG_BDHADDR_HI                     0x00000050
 #define BNX2_L2CTX_NX_PG_BDHADDR_LO                     0x00000054
 
@@ -4450,6 +4451,14 @@ struct l2_fhdr {
 #define BNX2_MQ_MEM_RD_DATA2_VALUE                       (0x3fffffffL<<0)
 #define BNX2_MQ_MEM_RD_DATA2_VALUE_XI                    (0x7fffffffL<<0)
 
+#define BNX2_MQ_MAP_L2_3                                0x00003d2c
+#define BNX2_MQ_MAP_L2_3_MQ_OFFSET                       (0xffL<<0)
+#define BNX2_MQ_MAP_L2_3_SZ                              (0x3L<<8)
+#define BNX2_MQ_MAP_L2_3_CTX_OFFSET                      (0x2ffL<<10)
+#define BNX2_MQ_MAP_L2_3_BIN_OFFSET                      (0x7L<<23)
+#define BNX2_MQ_MAP_L2_3_ARM                             (0x3L<<26)
+#define BNX2_MQ_MAP_L2_3_ENA                             (0x1L<<31)
+#define BNX2_MQ_MAP_L2_3_DEFAULT                         0x82004646
 
 /*
  *  tsch_reg definition
@@ -6360,9 +6369,11 @@ struct l2_fhdr {
 #define MAX_TX_DESC_CNT (TX_DESC_CNT - 1)
 
 #define MAX_RX_RINGS    4
+#define MAX_RX_PG_RINGS 16
 #define RX_DESC_CNT  (BCM_PAGE_SIZE / sizeof(struct rx_bd))
 #define MAX_RX_DESC_CNT (RX_DESC_CNT - 1)
 #define MAX_TOTAL_RX_DESC_CNT (MAX_RX_DESC_CNT * MAX_RX_RINGS)
+#define MAX_TOTAL_RX_PG_DESC_CNT (MAX_RX_DESC_CNT * MAX_RX_PG_RINGS)
 
 #define NEXT_TX_BD(x) (((x) & (MAX_TX_DESC_CNT - 1)) ==                 \
                 (MAX_TX_DESC_CNT - 1)) ?                                \
@@ -6375,6 +6386,7 @@ struct l2_fhdr {
         (x) + 2 : (x) + 1
 
 #define RX_RING_IDX(x) ((x) & bp->rx_max_ring_idx)
+#define RX_PG_RING_IDX(x) ((x) & bp->rx_max_pg_ring_idx)
 
 #define RX_RING(x) (((x) & ~MAX_RX_DESC_CNT) >> (BCM_PAGE_BITS - 4))
 #define RX_IDX(x) ((x) & MAX_RX_DESC_CNT)
@@ -6413,7 +6425,13 @@ struct sw_bd {
         DECLARE_PCI_UNMAP_ADDR(mapping)
 };
 
+struct sw_pg {
+        struct page             *page;
+        DECLARE_PCI_UNMAP_ADDR(mapping)
+};
+
 #define SW_RXBD_RING_SIZE (sizeof(struct sw_bd) * RX_DESC_CNT)
+#define SW_RXPG_RING_SIZE (sizeof(struct sw_pg) * RX_DESC_CNT)
 #define RXBD_RING_SIZE (sizeof(struct rx_bd) * RX_DESC_CNT)
 #define SW_TXBD_RING_SIZE (sizeof(struct sw_bd) * TX_DESC_CNT)
 #define TXBD_RING_SIZE (sizeof(struct tx_bd) * TX_DESC_CNT)
@@ -6520,15 +6538,21 @@ struct bnx2 {
         u32                     rx_buf_size;            /* with alignment */
         u32                     rx_copy_thresh;
         u32                     rx_max_ring_idx;
+        u32                     rx_max_pg_ring_idx;
 
         u32                     rx_prod_bseq;
         u16                     rx_prod;
         u16                     rx_cons;
 
+        u16                     rx_pg_prod;
+        u16                     rx_pg_cons;
+
         u32                     rx_csum;
 
         struct sw_bd            *rx_buf_ring;
         struct rx_bd            *rx_desc_ring[MAX_RX_RINGS];
+        struct sw_pg            *rx_pg_ring;
+        struct rx_bd            *rx_pg_desc_ring[MAX_RX_PG_RINGS];
 
         /* TX constants */
         struct tx_bd    *tx_desc_ring;
@@ -6616,6 +6640,10 @@ struct bnx2 {
         int                     rx_ring_size;
         dma_addr_t              rx_desc_mapping[MAX_RX_RINGS];
 
+        int                     rx_max_pg_ring;
+        int                     rx_pg_ring_size;
+        dma_addr_t              rx_pg_desc_mapping[MAX_RX_PG_RINGS];
+
         u16                     tx_quick_cons_trip;
         u16                     tx_quick_cons_trip_int;
         u16                     rx_quick_cons_trip;