drivers/net/cxgb3/adapter.h

   1 /*
   2  * Copyright (c) 2003-2008 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 <linux/bitops.h>
  45 #include "t3cdev.h"
  46 #include <asm/io.h>
  47
  48 struct adapter;
  49 struct sge_qset;
  50 struct port_info;
  51
  52 enum mac_idx_types {
  53         LAN_MAC_IDX     = 0,
  54         SAN_MAC_IDX,
  55
  56         MAX_MAC_IDX
  57 };
  58
  59 struct iscsi_config {
  60         __u8    mac_addr[ETH_ALEN];
  61         __u32   flags;
  62         int (*send)(struct port_info *pi, struct sk_buff **skb);
  63         int (*recv)(struct port_info *pi, struct sk_buff *skb);
  64 };
  65
  66 struct port_info {
  67         struct adapter *adapter;
  68         struct sge_qset *qs;
  69         u8 port_id;
  70         u8 nqsets;
  71         u8 first_qset;
  72         struct cphy phy;
  73         struct cmac mac;
  74         struct link_config link_config;
  75         struct net_device_stats netstats;
  76         int activity;
  77         __be32 iscsi_ipv4addr;
  78         struct iscsi_config iscsic;
  79
  80         int link_fault; /* link fault was detected */
  81 };
  82
  83 enum {                          /* adapter flags */
  84         FULL_INIT_DONE = (1 << 0),
  85         USING_MSI = (1 << 1),
  86         USING_MSIX = (1 << 2),
  87         QUEUES_BOUND = (1 << 3),
  88         TP_PARITY_INIT = (1 << 4),
  89         NAPI_INIT = (1 << 5),
  90 };
  91
  92 struct fl_pg_chunk {
  93         struct page *page;
  94         void *va;
  95         unsigned int offset;
  96         unsigned long *p_cnt;
  97         dma_addr_t mapping;
  98 };
  99
 100 struct rx_desc;
 101 struct rx_sw_desc;
 102
 103 struct sge_fl {                     /* SGE per free-buffer list state */
 104         unsigned int buf_size;      /* size of each Rx buffer */
 105         unsigned int credits;       /* # of available Rx buffers */
 106         unsigned int pend_cred;     /* new buffers since last FL DB ring */
 107         unsigned int size;          /* capacity of free list */
 108         unsigned int cidx;          /* consumer index */
 109         unsigned int pidx;          /* producer index */
 110         unsigned int gen;           /* free list generation */
 111         struct fl_pg_chunk pg_chunk;/* page chunk cache */
 112         unsigned int use_pages;     /* whether FL uses pages or sk_buffs */
 113         unsigned int order;         /* order of page allocations */
 114         unsigned int alloc_size;    /* size of allocated buffer */
 115         struct rx_desc *desc;       /* address of HW Rx descriptor ring */
 116         struct rx_sw_desc *sdesc;   /* address of SW Rx descriptor ring */
 117         dma_addr_t   phys_addr;     /* physical address of HW ring start */
 118         unsigned int cntxt_id;      /* SGE context id for the free list */
 119         unsigned long empty;        /* # of times queue ran out of buffers */
 120         unsigned long alloc_failed; /* # of times buffer allocation failed */
 121 };
 122
 123 /*
 124  * Bundle size for grouping offload RX packets for delivery to the stack.
 125  * Don't make this too big as we do prefetch on each packet in a bundle.
 126  */
 127 # define RX_BUNDLE_SIZE 8
 128
 129 struct rsp_desc;
 130
 131 struct sge_rspq {               /* state for an SGE response queue */
 132         unsigned int credits;   /* # of pending response credits */
 133         unsigned int size;      /* capacity of response queue */
 134         unsigned int cidx;      /* consumer index */
 135         unsigned int gen;       /* current generation bit */
 136         unsigned int polling;   /* is the queue serviced through NAPI? */
 137         unsigned int holdoff_tmr;       /* interrupt holdoff timer in 100ns */
 138         unsigned int next_holdoff;      /* holdoff time for next interrupt */
 139         unsigned int rx_recycle_buf; /* whether recycling occurred
 140                                         within current sop-eop */
 141         struct rsp_desc *desc;  /* address of HW response ring */
 142         dma_addr_t phys_addr;   /* physical address of the ring */
 143         unsigned int cntxt_id;  /* SGE context id for the response q */
 144         spinlock_t lock;        /* guards response processing */
 145         struct sk_buff_head rx_queue; /* offload packet receive queue */
 146         struct sk_buff *pg_skb; /* used to build frag list in napi handler */
 147
 148         unsigned long offload_pkts;
 149         unsigned long offload_bundles;
 150         unsigned long eth_pkts; /* # of ethernet packets */
 151         unsigned long pure_rsps;        /* # of pure (non-data) responses */
 152         unsigned long imm_data; /* responses with immediate data */
 153         unsigned long rx_drops; /* # of packets dropped due to no mem */
 154         unsigned long async_notif; /* # of asynchronous notification events */
 155         unsigned long empty;    /* # of times queue ran out of credits */
 156         unsigned long nomem;    /* # of responses deferred due to no mem */
 157         unsigned long unhandled_irqs;   /* # of spurious intrs */
 158         unsigned long starved;
 159         unsigned long restarted;
 160 };
 161
 162 struct tx_desc;
 163 struct tx_sw_desc;
 164
 165 struct sge_txq {                /* state for an SGE Tx queue */
 166         unsigned long flags;    /* HW DMA fetch status */
 167         unsigned int in_use;    /* # of in-use Tx descriptors */
 168         unsigned int size;      /* # of descriptors */
 169         unsigned int processed; /* total # of descs HW has processed */
 170         unsigned int cleaned;   /* total # of descs SW has reclaimed */
 171         unsigned int stop_thres;        /* SW TX queue suspend threshold */
 172         unsigned int cidx;      /* consumer index */
 173         unsigned int pidx;      /* producer index */
 174         unsigned int gen;       /* current value of generation bit */
 175         unsigned int unacked;   /* Tx descriptors used since last COMPL */
 176         struct tx_desc *desc;   /* address of HW Tx descriptor ring */
 177         struct tx_sw_desc *sdesc;       /* address of SW Tx descriptor ring */
 178         spinlock_t lock;        /* guards enqueueing of new packets */
 179         unsigned int token;     /* WR token */
 180         dma_addr_t phys_addr;   /* physical address of the ring */
 181         struct sk_buff_head sendq;      /* List of backpressured offload packets */
 182         struct tasklet_struct qresume_tsk;      /* restarts the queue */
 183         unsigned int cntxt_id;  /* SGE context id for the Tx q */
 184         unsigned long stops;    /* # of times q has been stopped */
 185         unsigned long restarts; /* # of queue restarts */
 186 };
 187
 188 enum {                          /* per port SGE statistics */
 189         SGE_PSTAT_TSO,          /* # of TSO requests */
 190         SGE_PSTAT_RX_CSUM_GOOD, /* # of successful RX csum offloads */
 191         SGE_PSTAT_TX_CSUM,      /* # of TX checksum offloads */
 192         SGE_PSTAT_VLANEX,       /* # of VLAN tag extractions */
 193         SGE_PSTAT_VLANINS,      /* # of VLAN tag insertions */
 194
 195         SGE_PSTAT_MAX           /* must be last */
 196 };
 197
 198 struct napi_gro_fraginfo;
 199
 200 struct sge_qset {               /* an SGE queue set */
 201         struct adapter *adap;
 202         struct napi_struct napi;
 203         struct sge_rspq rspq;
 204         struct sge_fl fl[SGE_RXQ_PER_SET];
 205         struct sge_txq txq[SGE_TXQ_PER_SET];
 206         int nomem;
 207         void *lro_va;
 208         struct net_device *netdev;
 209         struct netdev_queue *tx_q;      /* associated netdev TX queue */
 210         unsigned long txq_stopped;      /* which Tx queues are stopped */
 211         struct timer_list tx_reclaim_timer;     /* reclaims TX buffers */
 212         struct timer_list rx_reclaim_timer;     /* reclaims RX buffers */
 213         unsigned long port_stats[SGE_PSTAT_MAX];
 214 } ____cacheline_aligned;
 215
 216 struct sge {
 217         struct sge_qset qs[SGE_QSETS];
 218         spinlock_t reg_lock;    /* guards non-atomic SGE registers (eg context) */
 219 };
 220
 221 struct adapter {
 222         struct t3cdev tdev;
 223         struct list_head adapter_list;
 224         void __iomem *regs;
 225         struct pci_dev *pdev;
 226         unsigned long registered_device_map;
 227         unsigned long open_device_map;
 228         unsigned long flags;
 229
 230         const char *name;
 231         int msg_enable;
 232         unsigned int mmio_len;
 233
 234         struct adapter_params params;
 235         unsigned int slow_intr_mask;
 236         unsigned long irq_stats[IRQ_NUM_STATS];
 237
 238         int msix_nvectors;
 239         struct {
 240                 unsigned short vec;
 241                 char desc[22];
 242         } msix_info[SGE_QSETS + 1];
 243
 244         /* T3 modules */
 245         struct sge sge;
 246         struct mc7 pmrx;
 247         struct mc7 pmtx;
 248         struct mc7 cm;
 249         struct mc5 mc5;
 250
 251         struct net_device *port[MAX_NPORTS];
 252         unsigned int check_task_cnt;
 253         struct delayed_work adap_check_task;
 254         struct work_struct ext_intr_handler_task;
 255         struct work_struct fatal_error_handler_task;
 256         struct work_struct link_fault_handler_task;
 257
 258         struct work_struct db_full_task;
 259         struct work_struct db_empty_task;
 260         struct work_struct db_drop_task;
 261
 262         struct dentry *debugfs_root;
 263
 264         struct mutex mdio_lock;
 265         spinlock_t stats_lock;
 266         spinlock_t work_lock;
 267
 268         struct sk_buff *nofail_skb;
 269 };
 270
 271 static inline u32 t3_read_reg(struct adapter *adapter, u32 reg_addr)
 272 {
 273         u32 val = readl(adapter->regs + reg_addr);
 274
 275         CH_DBG(adapter, MMIO, "read register 0x%x value 0x%x\n", reg_addr, val);
 276         return val;
 277 }
 278
 279 static inline void t3_write_reg(struct adapter *adapter, u32 reg_addr, u32 val)
 280 {
 281         CH_DBG(adapter, MMIO, "setting register 0x%x to 0x%x\n", reg_addr, val);
 282         writel(val, adapter->regs + reg_addr);
 283 }
 284
 285 static inline struct port_info *adap2pinfo(struct adapter *adap, int idx)
 286 {
 287         return netdev_priv(adap->port[idx]);
 288 }
 289
 290 static inline int phy2portid(struct cphy *phy)
 291 {
 292         struct adapter *adap = phy->adapter;
 293         struct port_info *port0 = adap2pinfo(adap, 0);
 294
 295         return &port0->phy == phy ? 0 : 1;
 296 }
 297
 298 #define OFFLOAD_DEVMAP_BIT 15
 299
 300 #define tdev2adap(d) container_of(d, struct adapter, tdev)
 301
 302 static inline int offload_running(struct adapter *adapter)
 303 {
 304         return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
 305 }
 306
 307 int t3_offload_tx(struct t3cdev *tdev, struct sk_buff *skb);
 308
 309 void t3_os_ext_intr_handler(struct adapter *adapter);
 310 void t3_os_link_changed(struct adapter *adapter, int port_id, int link_status,
 311                         int speed, int duplex, int fc);
 312 void t3_os_phymod_changed(struct adapter *adap, int port_id);
 313 void t3_os_link_fault(struct adapter *adapter, int port_id, int state);
 314 void t3_os_link_fault_handler(struct adapter *adapter, int port_id);
 315
 316 void t3_sge_start(struct adapter *adap);
 317 void t3_sge_stop(struct adapter *adap);
 318 void t3_start_sge_timers(struct adapter *adap);
 319 void t3_stop_sge_timers(struct adapter *adap);
 320 void t3_free_sge_resources(struct adapter *adap);
 321 void t3_sge_err_intr_handler(struct adapter *adapter);
 322 irq_handler_t t3_intr_handler(struct adapter *adap, int polling);
 323 netdev_tx_t t3_eth_xmit(struct sk_buff *skb, struct net_device *dev);
 324 int t3_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
 325 void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p);
 326 int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
 327                       int irq_vec_idx, const struct qset_params *p,
 328                       int ntxq, struct net_device *dev,
 329                       struct netdev_queue *netdevq);
 330 extern struct workqueue_struct *cxgb3_wq;
 331
 332 int t3_get_edc_fw(struct cphy *phy, int edc_idx, int size);
 333
 334 #endif                          /* __T3_ADAPTER_H__ */