drivers/net/cxgb3/adapter.h

   1 /*
   2  * This file is part of the Chelsio T3 Ethernet driver for Linux.
   3  *
   4  * Copyright (C) 2003-2006 Chelsio Communications.  All rights reserved.
   5  *
   6  * This program is distributed in the hope that it will be useful, but WITHOUT
   7  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   8  * FITNESS FOR A PARTICULAR PURPOSE.  See the LICENSE file included in this
   9  * release for licensing terms and conditions.
  10  */
  11
  12 /* This file should not be included directly.  Include common.h instead. */
  13
  14 #ifndef __T3_ADAPTER_H__
  15 #define __T3_ADAPTER_H__
  16
  17 #include <linux/pci.h>
  18 #include <linux/spinlock.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/timer.h>
  21 #include <linux/cache.h>
  22 #include "t3cdev.h"
  23 #include <asm/semaphore.h>
  24 #include <asm/bitops.h>
  25 #include <asm/io.h>
  26
  27 typedef irqreturn_t(*intr_handler_t) (int, void *);
  28
  29 struct vlan_group;
  30
  31 struct port_info {
  32         struct vlan_group *vlan_grp;
  33         const struct port_type_info *port_type;
  34         u8 port_id;
  35         u8 rx_csum_offload;
  36         u8 nqsets;
  37         u8 first_qset;
  38         struct cphy phy;
  39         struct cmac mac;
  40         struct link_config link_config;
  41         struct net_device_stats netstats;
  42         int activity;
  43 };
  44
  45 enum {                          /* adapter flags */
  46         FULL_INIT_DONE = (1 << 0),
  47         USING_MSI = (1 << 1),
  48         USING_MSIX = (1 << 2),
  49 };
  50
  51 struct rx_desc;
  52 struct rx_sw_desc;
  53
  54 struct sge_fl {                 /* SGE per free-buffer list state */
  55         unsigned int buf_size;  /* size of each Rx buffer */
  56         unsigned int credits;   /* # of available Rx buffers */
  57         unsigned int size;      /* capacity of free list */
  58         unsigned int cidx;      /* consumer index */
  59         unsigned int pidx;      /* producer index */
  60         unsigned int gen;       /* free list generation */
  61         struct rx_desc *desc;   /* address of HW Rx descriptor ring */
  62         struct rx_sw_desc *sdesc;       /* address of SW Rx descriptor ring */
  63         dma_addr_t phys_addr;   /* physical address of HW ring start */
  64         unsigned int cntxt_id;  /* SGE context id for the free list */
  65         unsigned long empty;    /* # of times queue ran out of buffers */
  66 };
  67
  68 /*
  69  * Bundle size for grouping offload RX packets for delivery to the stack.
  70  * Don't make this too big as we do prefetch on each packet in a bundle.
  71  */
  72 # define RX_BUNDLE_SIZE 8
  73
  74 struct rsp_desc;
  75
  76 struct sge_rspq {               /* state for an SGE response queue */
  77         unsigned int credits;   /* # of pending response credits */
  78         unsigned int size;      /* capacity of response queue */
  79         unsigned int cidx;      /* consumer index */
  80         unsigned int gen;       /* current generation bit */
  81         unsigned int polling;   /* is the queue serviced through NAPI? */
  82         unsigned int holdoff_tmr;       /* interrupt holdoff timer in 100ns */
  83         unsigned int next_holdoff;      /* holdoff time for next interrupt */
  84         struct rsp_desc *desc;  /* address of HW response ring */
  85         dma_addr_t phys_addr;   /* physical address of the ring */
  86         unsigned int cntxt_id;  /* SGE context id for the response q */
  87         spinlock_t lock;        /* guards response processing */
  88         struct sk_buff *rx_head;        /* offload packet receive queue head */
  89         struct sk_buff *rx_tail;        /* offload packet receive queue tail */
  90
  91         unsigned long offload_pkts;
  92         unsigned long offload_bundles;
  93         unsigned long eth_pkts; /* # of ethernet packets */
  94         unsigned long pure_rsps;        /* # of pure (non-data) responses */
  95         unsigned long imm_data; /* responses with immediate data */
  96         unsigned long rx_drops; /* # of packets dropped due to no mem */
  97         unsigned long async_notif; /* # of asynchronous notification events */
  98         unsigned long empty;    /* # of times queue ran out of credits */
  99         unsigned long nomem;    /* # of responses deferred due to no mem */
 100         unsigned long unhandled_irqs;   /* # of spurious intrs */
 101 };
 102
 103 struct tx_desc;
 104 struct tx_sw_desc;
 105
 106 struct sge_txq {                /* state for an SGE Tx queue */
 107         unsigned long flags;    /* HW DMA fetch status */
 108         unsigned int in_use;    /* # of in-use Tx descriptors */
 109         unsigned int size;      /* # of descriptors */
 110         unsigned int processed; /* total # of descs HW has processed */
 111         unsigned int cleaned;   /* total # of descs SW has reclaimed */
 112         unsigned int stop_thres;        /* SW TX queue suspend threshold */
 113         unsigned int cidx;      /* consumer index */
 114         unsigned int pidx;      /* producer index */
 115         unsigned int gen;       /* current value of generation bit */
 116         unsigned int unacked;   /* Tx descriptors used since last COMPL */
 117         struct tx_desc *desc;   /* address of HW Tx descriptor ring */
 118         struct tx_sw_desc *sdesc;       /* address of SW Tx descriptor ring */
 119         spinlock_t lock;        /* guards enqueueing of new packets */
 120         unsigned int token;     /* WR token */
 121         dma_addr_t phys_addr;   /* physical address of the ring */
 122         struct sk_buff_head sendq;      /* List of backpressured offload packets */
 123         struct tasklet_struct qresume_tsk;      /* restarts the queue */
 124         unsigned int cntxt_id;  /* SGE context id for the Tx q */
 125         unsigned long stops;    /* # of times q has been stopped */
 126         unsigned long restarts; /* # of queue restarts */
 127 };
 128
 129 enum {                          /* per port SGE statistics */
 130         SGE_PSTAT_TSO,          /* # of TSO requests */
 131         SGE_PSTAT_RX_CSUM_GOOD, /* # of successful RX csum offloads */
 132         SGE_PSTAT_TX_CSUM,      /* # of TX checksum offloads */
 133         SGE_PSTAT_VLANEX,       /* # of VLAN tag extractions */
 134         SGE_PSTAT_VLANINS,      /* # of VLAN tag insertions */
 135
 136         SGE_PSTAT_MAX           /* must be last */
 137 };
 138
 139 struct sge_qset {               /* an SGE queue set */
 140         struct sge_rspq rspq;
 141         struct sge_fl fl[SGE_RXQ_PER_SET];
 142         struct sge_txq txq[SGE_TXQ_PER_SET];
 143         struct net_device *netdev;      /* associated net device */
 144         unsigned long txq_stopped;      /* which Tx queues are stopped */
 145         struct timer_list tx_reclaim_timer;     /* reclaims TX buffers */
 146         unsigned long port_stats[SGE_PSTAT_MAX];
 147 } ____cacheline_aligned;
 148
 149 struct sge {
 150         struct sge_qset qs[SGE_QSETS];
 151         spinlock_t reg_lock;    /* guards non-atomic SGE registers (eg context) */
 152 };
 153
 154 struct adapter {
 155         struct t3cdev tdev;
 156         struct list_head adapter_list;
 157         void __iomem *regs;
 158         struct pci_dev *pdev;
 159         unsigned long registered_device_map;
 160         unsigned long open_device_map;
 161         unsigned long flags;
 162
 163         const char *name;
 164         int msg_enable;
 165         unsigned int mmio_len;
 166
 167         struct adapter_params params;
 168         unsigned int slow_intr_mask;
 169         unsigned long irq_stats[IRQ_NUM_STATS];
 170
 171         struct {
 172                 unsigned short vec;
 173                 char desc[22];
 174         } msix_info[SGE_QSETS + 1];
 175
 176         /* T3 modules */
 177         struct sge sge;
 178         struct mc7 pmrx;
 179         struct mc7 pmtx;
 180         struct mc7 cm;
 181         struct mc5 mc5;
 182
 183         struct net_device *port[MAX_NPORTS];
 184         unsigned int check_task_cnt;
 185         struct delayed_work adap_check_task;
 186         struct work_struct ext_intr_handler_task;
 187
 188         /*
 189          * Dummy netdevices are needed when using multiple receive queues with
 190          * NAPI as each netdevice can service only one queue.
 191          */
 192         struct net_device *dummy_netdev[SGE_QSETS - 1];
 193
 194         struct dentry *debugfs_root;
 195
 196         struct mutex mdio_lock;
 197         spinlock_t stats_lock;
 198         spinlock_t work_lock;
 199 };
 200
 201 static inline u32 t3_read_reg(struct adapter *adapter, u32 reg_addr)
 202 {
 203         u32 val = readl(adapter->regs + reg_addr);
 204
 205         CH_DBG(adapter, MMIO, "read register 0x%x value 0x%x\n", reg_addr, val);
 206         return val;
 207 }
 208
 209 static inline void t3_write_reg(struct adapter *adapter, u32 reg_addr, u32 val)
 210 {
 211         CH_DBG(adapter, MMIO, "setting register 0x%x to 0x%x\n", reg_addr, val);
 212         writel(val, adapter->regs + reg_addr);
 213 }
 214
 215 static inline struct port_info *adap2pinfo(struct adapter *adap, int idx)
 216 {
 217         return netdev_priv(adap->port[idx]);
 218 }
 219
 220 /*
 221  * We use the spare atalk_ptr to map a net device to its SGE queue set.
 222  * This is a macro so it can be used as l-value.
 223  */
 224 #define dev2qset(netdev) ((netdev)->atalk_ptr)
 225
 226 #define OFFLOAD_DEVMAP_BIT 15
 227
 228 #define tdev2adap(d) container_of(d, struct adapter, tdev)
 229
 230 static inline int offload_running(struct adapter *adapter)
 231 {
 232         return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
 233 }
 234
 235 int t3_offload_tx(struct t3cdev *tdev, struct sk_buff *skb);
 236
 237 void t3_os_ext_intr_handler(struct adapter *adapter);
 238 void t3_os_link_changed(struct adapter *adapter, int port_id, int link_status,
 239                         int speed, int duplex, int fc);
 240
 241 void t3_sge_start(struct adapter *adap);
 242 void t3_sge_stop(struct adapter *adap);
 243 void t3_free_sge_resources(struct adapter *adap);
 244 void t3_sge_err_intr_handler(struct adapter *adapter);
 245 intr_handler_t t3_intr_handler(struct adapter *adap, int polling);
 246 int t3_eth_xmit(struct sk_buff *skb, struct net_device *dev);
 247 void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p);
 248 int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
 249                       int irq_vec_idx, const struct qset_params *p,
 250                       int ntxq, struct net_device *netdev);
 251 int t3_get_desc(const struct sge_qset *qs, unsigned int qnum, unsigned int idx,
 252                 unsigned char *data);
 253 irqreturn_t t3_sge_intr_msix(int irq, void *cookie);
 254
 255 #endif                          /* __T3_ADAPTER_H__ */