release/src-rt-6.x/linux/linux-2.6/drivers/net/cxgb3/adapter.h

   1 /*
   2  * Copyright (c) 2003-2007 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 /* This file should not be included directly.  Include common.h instead. */
  34
  35 #ifndef __T3_ADAPTER_H__
  36 #define __T3_ADAPTER_H__
  37
  38 #include <linux/pci.h>
  39 #include <linux/spinlock.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/timer.h>
  42 #include <linux/cache.h>
  43 #include <linux/mutex.h>
  44 #include "t3cdev.h"
  45 #include <asm/semaphore.h>
  46 #include <asm/bitops.h>
  47 #include <asm/io.h>
  48
  49 typedef irqreturn_t(*intr_handler_t) (int, void *);
  50
  51 struct vlan_group;
  52
  53 struct port_info {
  54         struct vlan_group *vlan_grp;
  55         const struct port_type_info *port_type;
  56         u8 port_id;
  57         u8 rx_csum_offload;
  58         u8 nqsets;
  59         u8 first_qset;
  60         struct cphy phy;
  61         struct cmac mac;
  62         struct link_config link_config;
  63         struct net_device_stats netstats;
  64         int activity;
  65 };
  66
  67 enum {                          /* adapter flags */
  68         FULL_INIT_DONE = (1 << 0),
  69         USING_MSI = (1 << 1),
  70         USING_MSIX = (1 << 2),
  71         QUEUES_BOUND = (1 << 3),
  72 };
  73
  74 struct rx_desc;
  75 struct rx_sw_desc;
  76
  77 struct sge_fl_page {
  78         struct skb_frag_struct frag;
  79         unsigned char *va;
  80 };
  81
  82 struct sge_fl {                 /* SGE per free-buffer list state */
  83         unsigned int buf_size;  /* size of each Rx buffer */
  84         unsigned int credits;   /* # of available Rx buffers */
  85         unsigned int size;      /* capacity of free list */
  86         unsigned int cidx;      /* consumer index */
  87         unsigned int pidx;      /* producer index */
  88         unsigned int gen;       /* free list generation */
  89         unsigned int cntxt_id;  /* SGE context id for the free list */
  90         struct sge_fl_page page;
  91         struct rx_desc *desc;   /* address of HW Rx descriptor ring */
  92         struct rx_sw_desc *sdesc;       /* address of SW Rx descriptor ring */
  93         dma_addr_t phys_addr;   /* physical address of HW ring start */
  94         unsigned long empty;    /* # of times queue ran out of buffers */
  95         unsigned long alloc_failed; /* # of times buffer allocation failed */
  96 };
  97
  98 /*
  99  * Bundle size for grouping offload RX packets for delivery to the stack.
 100  * Don't make this too big as we do prefetch on each packet in a bundle.
 101  */
 102 # define RX_BUNDLE_SIZE 8
 103
 104 struct rsp_desc;
 105
 106 struct sge_rspq {               /* state for an SGE response queue */
 107         unsigned int credits;   /* # of pending response credits */
 108         unsigned int size;      /* capacity of response queue */
 109         unsigned int cidx;      /* consumer index */
 110         unsigned int gen;       /* current generation bit */
 111         unsigned int polling;   /* is the queue serviced through NAPI? */
 112         unsigned int holdoff_tmr;       /* interrupt holdoff timer in 100ns */
 113         unsigned int next_holdoff;      /* holdoff time for next interrupt */
 114         struct rsp_desc *desc;  /* address of HW response ring */
 115         dma_addr_t phys_addr;   /* physical address of the ring */
 116         unsigned int cntxt_id;  /* SGE context id for the response q */
 117         spinlock_t lock;        /* guards response processing */
 118         struct sk_buff *rx_head;        /* offload packet receive queue head */
 119         struct sk_buff *rx_tail;        /* offload packet receive queue tail */
 120
 121         unsigned long offload_pkts;
 122         unsigned long offload_bundles;
 123         unsigned long eth_pkts; /* # of ethernet packets */
 124         unsigned long pure_rsps;        /* # of pure (non-data) responses */
 125         unsigned long imm_data; /* responses with immediate data */
 126         unsigned long rx_drops; /* # of packets dropped due to no mem */
 127         unsigned long async_notif; /* # of asynchronous notification events */
 128         unsigned long empty;    /* # of times queue ran out of credits */
 129         unsigned long nomem;    /* # of responses deferred due to no mem */
 130         unsigned long unhandled_irqs;   /* # of spurious intrs */
 131         unsigned long starved;
 132         unsigned long restarted;
 133 };
 134
 135 struct tx_desc;
 136 struct tx_sw_desc;
 137
 138 struct sge_txq {                /* state for an SGE Tx queue */
 139         unsigned long flags;    /* HW DMA fetch status */
 140         unsigned int in_use;    /* # of in-use Tx descriptors */
 141         unsigned int size;      /* # of descriptors */
 142         unsigned int processed; /* total # of descs HW has processed */
 143         unsigned int cleaned;   /* total # of descs SW has reclaimed */
 144         unsigned int stop_thres;        /* SW TX queue suspend threshold */
 145         unsigned int cidx;      /* consumer index */
 146         unsigned int pidx;      /* producer index */
 147         unsigned int gen;       /* current value of generation bit */
 148         unsigned int unacked;   /* Tx descriptors used since last COMPL */
 149         struct tx_desc *desc;   /* address of HW Tx descriptor ring */
 150         struct tx_sw_desc *sdesc;       /* address of SW Tx descriptor ring */
 151         spinlock_t lock;        /* guards enqueueing of new packets */
 152         unsigned int token;     /* WR token */
 153         dma_addr_t phys_addr;   /* physical address of the ring */
 154         struct sk_buff_head sendq;      /* List of backpressured offload packets */
 155         struct tasklet_struct qresume_tsk;      /* restarts the queue */
 156         unsigned int cntxt_id;  /* SGE context id for the Tx q */
 157         unsigned long stops;    /* # of times q has been stopped */
 158         unsigned long restarts; /* # of queue restarts */
 159 };
 160
 161 enum {                          /* per port SGE statistics */
 162         SGE_PSTAT_TSO,          /* # of TSO requests */
 163         SGE_PSTAT_RX_CSUM_GOOD, /* # of successful RX csum offloads */
 164         SGE_PSTAT_TX_CSUM,      /* # of TX checksum offloads */
 165         SGE_PSTAT_VLANEX,       /* # of VLAN tag extractions */
 166         SGE_PSTAT_VLANINS,      /* # of VLAN tag insertions */
 167
 168         SGE_PSTAT_MAX           /* must be last */
 169 };
 170
 171 struct sge_qset {               /* an SGE queue set */
 172         struct sge_rspq rspq;
 173         struct sge_fl fl[SGE_RXQ_PER_SET];
 174         struct sge_txq txq[SGE_TXQ_PER_SET];
 175         struct net_device *netdev;      /* associated net device */
 176         unsigned long txq_stopped;      /* which Tx queues are stopped */
 177         struct timer_list tx_reclaim_timer;     /* reclaims TX buffers */
 178         unsigned long port_stats[SGE_PSTAT_MAX];
 179 } ____cacheline_aligned;
 180
 181 struct sge {
 182         struct sge_qset qs[SGE_QSETS];
 183         spinlock_t reg_lock;    /* guards non-atomic SGE registers (eg context) */
 184 };
 185
 186 struct adapter {
 187         struct t3cdev tdev;
 188         struct list_head adapter_list;
 189         void __iomem *regs;
 190         struct pci_dev *pdev;
 191         unsigned long registered_device_map;
 192         unsigned long open_device_map;
 193         unsigned long flags;
 194
 195         const char *name;
 196         int msg_enable;
 197         unsigned int mmio_len;
 198
 199         struct adapter_params params;
 200         unsigned int slow_intr_mask;
 201         unsigned long irq_stats[IRQ_NUM_STATS];
 202
 203         struct {
 204                 unsigned short vec;
 205                 char desc[22];
 206         } msix_info[SGE_QSETS + 1];
 207
 208         /* T3 modules */
 209         struct sge sge;
 210         struct mc7 pmrx;
 211         struct mc7 pmtx;
 212         struct mc7 cm;
 213         struct mc5 mc5;
 214
 215         struct net_device *port[MAX_NPORTS];
 216         unsigned int check_task_cnt;
 217         struct delayed_work adap_check_task;
 218         struct work_struct ext_intr_handler_task;
 219
 220         /*
 221          * Dummy netdevices are needed when using multiple receive queues with
 222          * NAPI as each netdevice can service only one queue.
 223          */
 224         struct net_device *dummy_netdev[SGE_QSETS - 1];
 225
 226         struct dentry *debugfs_root;
 227
 228         struct mutex mdio_lock;
 229         spinlock_t stats_lock;
 230         spinlock_t work_lock;
 231 };
 232
 233 static inline u32 t3_read_reg(struct adapter *adapter, u32 reg_addr)
 234 {
 235         u32 val = readl(adapter->regs + reg_addr);
 236
 237         CH_DBG(adapter, MMIO, "read register 0x%x value 0x%x\n", reg_addr, val);
 238         return val;
 239 }
 240
 241 static inline void t3_write_reg(struct adapter *adapter, u32 reg_addr, u32 val)
 242 {
 243         CH_DBG(adapter, MMIO, "setting register 0x%x to 0x%x\n", reg_addr, val);
 244         writel(val, adapter->regs + reg_addr);
 245 }
 246
 247 static inline struct port_info *adap2pinfo(struct adapter *adap, int idx)
 248 {
 249         return netdev_priv(adap->port[idx]);
 250 }
 251
 252 /*
 253  * We use the spare atalk_ptr to map a net device to its SGE queue set.
 254  * This is a macro so it can be used as l-value.
 255  */
 256 #define dev2qset(netdev) ((netdev)->atalk_ptr)
 257
 258 #define OFFLOAD_DEVMAP_BIT 15
 259
 260 #define tdev2adap(d) container_of(d, struct adapter, tdev)
 261
 262 static inline int offload_running(struct adapter *adapter)
 263 {
 264         return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
 265 }
 266
 267 int t3_offload_tx(struct t3cdev *tdev, struct sk_buff *skb);
 268
 269 void t3_os_ext_intr_handler(struct adapter *adapter);
 270 void t3_os_link_changed(struct adapter *adapter, int port_id, int link_status,
 271                         int speed, int duplex, int fc);
 272
 273 void t3_sge_start(struct adapter *adap);
 274 void t3_sge_stop(struct adapter *adap);
 275 void t3_free_sge_resources(struct adapter *adap);
 276 void t3_sge_err_intr_handler(struct adapter *adapter);
 277 intr_handler_t t3_intr_handler(struct adapter *adap, int polling);
 278 int t3_eth_xmit(struct sk_buff *skb, struct net_device *dev);
 279 int t3_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
 280 void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p);
 281 int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
 282                       int irq_vec_idx, const struct qset_params *p,
 283                       int ntxq, struct net_device *netdev);
 284 int t3_get_desc(const struct sge_qset *qs, unsigned int qnum, unsigned int idx,
 285                 unsigned char *data);
 286 irqreturn_t t3_sge_intr_msix(int irq, void *cookie);
 287
 288 #endif                          /* __T3_ADAPTER_H__ */