net: Add be2net driver.

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

1 files changed, 327 insertions, 0 deletions

diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h
new file mode 100644
index 000000000000..63d593d53153
--- /dev/null
+++ b/drivers/net/benet/be.h
@@ -0,0 +1,327 @@
+/*
+ * Copyright (C) 2005 - 2009 ServerEngines
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.  The full GNU General
+ * Public License is included in this distribution in the file called COPYING.
+ *
+ * Contact Information:
+ * linux-drivers@serverengines.com
+ *
+ * ServerEngines
+ * 209 N. Fair Oaks Ave
+ * Sunnyvale, CA 94085
+ */
+
+#ifndef BE_H
+#define BE_H
+
+#include <linux/pci.h>
+#include <linux/etherdevice.h>
+#include <linux/version.h>
+#include <linux/delay.h>
+#include <net/tcp.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <linux/if_vlan.h>
+#include <linux/workqueue.h>
+#include <linux/interrupt.h>
+#include <linux/inet_lro.h>
+
+#include "be_hw.h"
+
+#define DRV_VER                 "2.0.348"
+#define DRV_NAME                "be2net"
+#define BE_NAME                 "ServerEngines BladeEngine2 10Gbps NIC"
+#define DRV_DESC                BE_NAME "Driver"
+
+/* Number of bytes of an RX frame that are copied to skb->data */
+#define BE_HDR_LEN              64
+#define BE_MAX_JUMBO_FRAME_SIZE 9018
+#define BE_MIN_MTU              256
+
+#define BE_NUM_VLANS_SUPPORTED  64
+#define BE_MAX_EQD              96
+#define BE_MAX_TX_FRAG_COUNT    30
+
+#define EVNT_Q_LEN              1024
+#define TX_Q_LEN                2048
+#define TX_CQ_LEN               1024
+#define RX_Q_LEN                1024    /* Does not support any other value */
+#define RX_CQ_LEN               1024
+#define MCC_Q_LEN               64      /* total size not to exceed 8 pages */
+#define MCC_CQ_LEN              256
+
+#define BE_NAPI_WEIGHT          64
+#define MAX_RX_POST             BE_NAPI_WEIGHT /* Frags posted at a time */
+#define RX_FRAGS_REFILL_WM      (RX_Q_LEN - MAX_RX_POST)
+
+#define BE_MAX_LRO_DESCRIPTORS  16
+#define BE_MAX_FRAGS_PER_FRAME  16
+
+struct be_dma_mem {
+        void *va;
+        dma_addr_t dma;
+        u32 size;
+};
+
+struct be_queue_info {
+        struct be_dma_mem dma_mem;
+        u16 len;
+        u16 entry_size; /* Size of an element in the queue */
+        u16 id;
+        u16 tail, head;
+        bool created;
+        atomic_t used;  /* Number of valid elements in the queue */
+};
+
+struct be_ctrl_info {
+        u8 __iomem *csr;
+        u8 __iomem *db;         /* Door Bell */
+        u8 __iomem *pcicfg;     /* PCI config space */
+        int pci_func;
+
+        /* Mbox used for cmd request/response */
+        spinlock_t cmd_lock;    /* For serializing cmds to BE card */
+        struct be_dma_mem mbox_mem;
+        /* Mbox mem is adjusted to align to 16 bytes. The allocated addr
+         * is stored for freeing purpose */
+        struct be_dma_mem mbox_mem_alloced;
+};
+
+#include "be_cmds.h"
+
+struct be_drvr_stats {
+        u32 be_tx_reqs;         /* number of TX requests initiated */
+        u32 be_tx_stops;        /* number of times TX Q was stopped */
+        u32 be_fwd_reqs;        /* number of send reqs through forwarding i/f */
+        u32 be_tx_wrbs;         /* number of tx WRBs used */
+        u32 be_tx_events;       /* number of tx completion events  */
+        u32 be_tx_compl;        /* number of tx completion entries processed */
+        u64 be_tx_jiffies;
+        ulong be_tx_bytes;
+        ulong be_tx_bytes_prev;
+        u32 be_tx_rate;
+
+        u32 cache_barrier[16];
+
+        u32 be_ethrx_post_fail;/* number of ethrx buffer alloc failures */
+        u32 be_polls;           /* number of times NAPI called poll function */
+        u32 be_rx_events;       /* number of ucast rx completion events  */
+        u32 be_rx_compl;        /* number of rx completion entries processed */
+        u32 be_lro_hgram_data[8];       /* histogram of LRO data packets */
+        u32 be_lro_hgram_ack[8];        /* histogram of LRO ACKs */
+        u64 be_rx_jiffies;
+        ulong be_rx_bytes;
+        ulong be_rx_bytes_prev;
+        u32 be_rx_rate;
+        /* number of non ether type II frames dropped where
+         * frame len > length field of Mac Hdr */
+        u32 be_802_3_dropped_frames;
+        /* number of non ether type II frames malformed where
+         * in frame len < length field of Mac Hdr */
+        u32 be_802_3_malformed_frames;
+        u32 be_rxcp_err;        /* Num rx completion entries w/ err set. */
+        ulong rx_fps_jiffies;   /* jiffies at last FPS calc */
+        u32 be_rx_frags;
+        u32 be_prev_rx_frags;
+        u32 be_rx_fps;          /* Rx frags per second */
+};
+
+struct be_stats_obj {
+        struct be_drvr_stats drvr_stats;
+        struct net_device_stats net_stats;
+        struct be_dma_mem cmd;
+};
+
+struct be_eq_obj {
+        struct be_queue_info q;
+        char desc[32];
+
+        /* Adaptive interrupt coalescing (AIC) info */
+        bool enable_aic;
+        u16 min_eqd;            /* in usecs */
+        u16 max_eqd;            /* in usecs */
+        u16 cur_eqd;            /* in usecs */
+
+        struct napi_struct napi;
+};
+
+struct be_tx_obj {
+        struct be_queue_info q;
+        struct be_queue_info cq;
+        /* Remember the skbs that were transmitted */
+        struct sk_buff *sent_skb_list[TX_Q_LEN];
+};
+
+/* Struct to remember the pages posted for rx frags */
+struct be_rx_page_info {
+        struct page *page;
+        dma_addr_t bus;
+        u16 page_offset;
+        bool last_page_user;
+};
+
+struct be_rx_obj {
+        struct be_queue_info q;
+        struct be_queue_info cq;
+        struct be_rx_page_info page_info_tbl[RX_Q_LEN];
+        struct net_lro_mgr lro_mgr;
+        struct net_lro_desc lro_desc[BE_MAX_LRO_DESCRIPTORS];
+};
+
+#define BE_NUM_MSIX_VECTORS             2       /* 1 each for Tx and Rx */
+struct be_adapter {
+        struct pci_dev *pdev;
+        struct net_device *netdev;
+
+        /* Mbox, pci config, csr address information */
+        struct be_ctrl_info ctrl;
+
+        struct msix_entry msix_entries[BE_NUM_MSIX_VECTORS];
+        bool msix_enabled;
+        bool isr_registered;
+
+        /* TX Rings */
+        struct be_eq_obj tx_eq;
+        struct be_tx_obj tx_obj;
+
+        u32 cache_line_break[8];
+
+        /* Rx rings */
+        struct be_eq_obj rx_eq;
+        struct be_rx_obj rx_obj;
+        u32 big_page_size;      /* Compounded page size shared by rx wrbs */
+
+        struct vlan_group *vlan_grp;
+        u16 num_vlans;
+        u8 vlan_tag[VLAN_GROUP_ARRAY_LEN];
+
+        struct be_stats_obj stats;
+        /* Work queue used to perform periodic tasks like getting statistics */
+        struct delayed_work work;
+
+        /* Ethtool knobs and info */
+        bool rx_csum;           /* BE card must perform rx-checksumming */
+        u32 max_rx_coal;
+        char fw_ver[FW_VER_LEN];
+        u32 if_handle;          /* Used to configure filtering */
+        u32 pmac_id;            /* MAC addr handle used by BE card */
+
+        struct be_link_info link;
+        u32 port_num;
+};
+
+extern struct ethtool_ops be_ethtool_ops;
+
+#define drvr_stats(adapter)             (&adapter->stats.drvr_stats)
+
+#define BE_SET_NETDEV_OPS(netdev, ops)  (netdev->netdev_ops = ops)
+
+static inline u32 MODULO(u16 val, u16 limit)
+{
+        BUG_ON(limit & (limit - 1));
+        return val & (limit - 1);
+}
+
+static inline void index_adv(u16 *index, u16 val, u16 limit)
+{
+        *index = MODULO((*index + val), limit);
+}
+
+static inline void index_inc(u16 *index, u16 limit)
+{
+        *index = MODULO((*index + 1), limit);
+}
+
+#define PAGE_SHIFT_4K           12
+#define PAGE_SIZE_4K            (1 << PAGE_SHIFT_4K)
+
+/* Returns number of pages spanned by the data starting at the given addr */
+#define PAGES_4K_SPANNED(_address, size)                                \
+                ((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) +     \
+                        (size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K))
+
+/* Byte offset into the page corresponding to given address */
+#define OFFSET_IN_PAGE(addr)                                            \
+                 ((size_t)(addr) & (PAGE_SIZE_4K-1))
+
+/* Returns bit offset within a DWORD of a bitfield */
+#define AMAP_BIT_OFFSET(_struct, field)                                 \
+                (((size_t)&(((_struct *)0)->field))%32)
+
+/* Returns the bit mask of the field that is NOT shifted into location. */
+static inline u32 amap_mask(u32 bitsize)
+{
+        return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1);
+}
+
+static inline void
+amap_set(void *ptr, u32 dw_offset, u32 mask, u32 offset, u32 value)
+{
+        u32 *dw = (u32 *) ptr + dw_offset;
+        *dw &= ~(mask << offset);
+        *dw |= (mask & value) << offset;
+}
+
+#define AMAP_SET_BITS(_struct, field, ptr, val)                         \
+                amap_set(ptr,                                           \
+                        offsetof(_struct, field)/32,                    \
+                        amap_mask(sizeof(((_struct *)0)->field)),       \
+                        AMAP_BIT_OFFSET(_struct, field),                \
+                        val)
+
+static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset)
+{
+        u32 *dw = (u32 *) ptr;
+        return mask & (*(dw + dw_offset) >> offset);
+}
+
+#define AMAP_GET_BITS(_struct, field, ptr)                              \
+                amap_get(ptr,                                           \
+                        offsetof(_struct, field)/32,                    \
+                        amap_mask(sizeof(((_struct *)0)->field)),       \
+                        AMAP_BIT_OFFSET(_struct, field))
+
+#define be_dws_cpu_to_le(wrb, len)      swap_dws(wrb, len)
+#define be_dws_le_to_cpu(wrb, len)      swap_dws(wrb, len)
+static inline void swap_dws(void *wrb, int len)
+{
+#ifdef __BIG_ENDIAN
+        u32 *dw = wrb;
+        BUG_ON(len % 4);
+        do {
+                *dw = cpu_to_le32(*dw);
+                dw++;
+                len -= 4;
+        } while (len);
+#endif                          /* __BIG_ENDIAN */
+}
+
+static inline u8 is_tcp_pkt(struct sk_buff *skb)
+{
+        u8 val = 0;
+
+        if (ip_hdr(skb)->version == 4)
+                val = (ip_hdr(skb)->protocol == IPPROTO_TCP);
+        else if (ip_hdr(skb)->version == 6)
+                val = (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP);
+
+        return val;
+}
+
+static inline u8 is_udp_pkt(struct sk_buff *skb)
+{
+        u8 val = 0;
+
+        if (ip_hdr(skb)->version == 4)
+                val = (ip_hdr(skb)->protocol == IPPROTO_UDP);
+        else if (ip_hdr(skb)->version == 6)
+                val = (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP);
+
+        return val;
+}
+
+#endif                          /* BE_H */