drivers/scsi/fnic/fnic.h

   1 /*
   2  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  */
  18 #ifndef _FNIC_H_
  19 #define _FNIC_H_
  20
  21 #include <linux/interrupt.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/bitops.h>
  25 #include <scsi/libfc.h>
  26 #include <scsi/libfcoe.h>
  27 #include "fnic_io.h"
  28 #include "fnic_res.h"
  29 #include "fnic_trace.h"
  30 #include "fnic_stats.h"
  31 #include "vnic_dev.h"
  32 #include "vnic_wq.h"
  33 #include "vnic_rq.h"
  34 #include "vnic_cq.h"
  35 #include "vnic_wq_copy.h"
  36 #include "vnic_intr.h"
  37 #include "vnic_stats.h"
  38 #include "vnic_scsi.h"
  39
  40 #define DRV_NAME                "fnic"
  41 #define DRV_DESCRIPTION         "Cisco FCoE HBA Driver"
  42 #define DRV_VERSION             "1.6.0.17a"
  43 #define PFX                     DRV_NAME ": "
  44 #define DFX                     DRV_NAME "%d: "
  45
  46 #define DESC_CLEAN_LOW_WATERMARK 8
  47 #define FNIC_UCSM_DFLT_THROTTLE_CNT_BLD 16 /* UCSM default throttle count */
  48 #define FNIC_MIN_IO_REQ                 256 /* Min IO throttle count */
  49 #define FNIC_MAX_IO_REQ         1024 /* scsi_cmnd tag map entries */
  50 #define FNIC_DFLT_IO_REQ        256 /* Default scsi_cmnd tag map entries */
  51 #define FNIC_IO_LOCKS           64 /* IO locks: power of 2 */
  52 #define FNIC_DFLT_QUEUE_DEPTH   32
  53 #define FNIC_STATS_RATE_LIMIT   4 /* limit rate at which stats are pulled up */
  54
  55 /*
  56  * Tag bits used for special requests.
  57  */
  58 #define FNIC_TAG_ABORT          BIT(30)         /* tag bit indicating abort */
  59 #define FNIC_TAG_DEV_RST        BIT(29)         /* indicates device reset */
  60 #define FNIC_TAG_MASK           (BIT(24) - 1)   /* mask for lookup */
  61 #define FNIC_NO_TAG             -1
  62
  63 /*
  64  * Command flags to identify the type of command and for other future
  65  * use.
  66  */
  67 #define FNIC_NO_FLAGS                   0
  68 #define FNIC_IO_INITIALIZED             BIT(0)
  69 #define FNIC_IO_ISSUED                  BIT(1)
  70 #define FNIC_IO_DONE                    BIT(2)
  71 #define FNIC_IO_REQ_NULL                BIT(3)
  72 #define FNIC_IO_ABTS_PENDING            BIT(4)
  73 #define FNIC_IO_ABORTED                 BIT(5)
  74 #define FNIC_IO_ABTS_ISSUED             BIT(6)
  75 #define FNIC_IO_TERM_ISSUED             BIT(7)
  76 #define FNIC_IO_INTERNAL_TERM_ISSUED    BIT(8)
  77 #define FNIC_IO_ABT_TERM_DONE           BIT(9)
  78 #define FNIC_IO_ABT_TERM_REQ_NULL       BIT(10)
  79 #define FNIC_IO_ABT_TERM_TIMED_OUT      BIT(11)
  80 #define FNIC_DEVICE_RESET               BIT(12)  /* Device reset request */
  81 #define FNIC_DEV_RST_ISSUED             BIT(13)
  82 #define FNIC_DEV_RST_TIMED_OUT          BIT(14)
  83 #define FNIC_DEV_RST_ABTS_ISSUED        BIT(15)
  84 #define FNIC_DEV_RST_TERM_ISSUED        BIT(16)
  85 #define FNIC_DEV_RST_DONE               BIT(17)
  86 #define FNIC_DEV_RST_REQ_NULL           BIT(18)
  87 #define FNIC_DEV_RST_ABTS_DONE          BIT(19)
  88 #define FNIC_DEV_RST_TERM_DONE          BIT(20)
  89 #define FNIC_DEV_RST_ABTS_PENDING       BIT(21)
  90
  91 /*
  92  * Usage of the scsi_cmnd scratchpad.
  93  * These fields are locked by the hashed io_req_lock.
  94  */
  95 #define CMD_SP(Cmnd)            ((Cmnd)->SCp.ptr)
  96 #define CMD_STATE(Cmnd)         ((Cmnd)->SCp.phase)
  97 #define CMD_ABTS_STATUS(Cmnd)   ((Cmnd)->SCp.Message)
  98 #define CMD_LR_STATUS(Cmnd)     ((Cmnd)->SCp.have_data_in)
  99 #define CMD_TAG(Cmnd)           ((Cmnd)->SCp.sent_command)
 100 #define CMD_FLAGS(Cmnd)         ((Cmnd)->SCp.Status)
 101
 102 #define FCPIO_INVALID_CODE 0x100 /* hdr_status value unused by firmware */
 103
 104 #define FNIC_LUN_RESET_TIMEOUT       10000      /* mSec */
 105 #define FNIC_HOST_RESET_TIMEOUT      10000      /* mSec */
 106 #define FNIC_RMDEVICE_TIMEOUT        1000       /* mSec */
 107 #define FNIC_HOST_RESET_SETTLE_TIME  30         /* Sec */
 108 #define FNIC_ABT_TERM_DELAY_TIMEOUT  500        /* mSec */
 109
 110 #define FNIC_MAX_FCP_TARGET     256
 111
 112 /**
 113  * state_flags to identify host state along along with fnic's state
 114  **/
 115 #define __FNIC_FLAGS_FWRESET            BIT(0) /* fwreset in progress */
 116 #define __FNIC_FLAGS_BLOCK_IO           BIT(1) /* IOs are blocked */
 117
 118 #define FNIC_FLAGS_NONE                 (0)
 119 #define FNIC_FLAGS_FWRESET              (__FNIC_FLAGS_FWRESET | \
 120                                         __FNIC_FLAGS_BLOCK_IO)
 121
 122 #define FNIC_FLAGS_IO_BLOCKED           (__FNIC_FLAGS_BLOCK_IO)
 123
 124 #define fnic_set_state_flags(fnicp, st_flags)   \
 125         __fnic_set_state_flags(fnicp, st_flags, 0)
 126
 127 #define fnic_clear_state_flags(fnicp, st_flags)  \
 128         __fnic_set_state_flags(fnicp, st_flags, 1)
 129
 130 extern unsigned int fnic_log_level;
 131
 132 #define FNIC_MAIN_LOGGING 0x01
 133 #define FNIC_FCS_LOGGING 0x02
 134 #define FNIC_SCSI_LOGGING 0x04
 135 #define FNIC_ISR_LOGGING 0x08
 136
 137 #define FNIC_CHECK_LOGGING(LEVEL, CMD)                          \
 138 do {                                                            \
 139         if (unlikely(fnic_log_level & LEVEL))                   \
 140                 do {                                            \
 141                         CMD;                                    \
 142                 } while (0);                                    \
 143 } while (0)
 144
 145 #define FNIC_MAIN_DBG(kern_level, host, fmt, args...)           \
 146         FNIC_CHECK_LOGGING(FNIC_MAIN_LOGGING,                   \
 147                          shost_printk(kern_level, host, fmt, ##args);)
 148
 149 #define FNIC_FCS_DBG(kern_level, host, fmt, args...)            \
 150         FNIC_CHECK_LOGGING(FNIC_FCS_LOGGING,                    \
 151                          shost_printk(kern_level, host, fmt, ##args);)
 152
 153 #define FNIC_SCSI_DBG(kern_level, host, fmt, args...)           \
 154         FNIC_CHECK_LOGGING(FNIC_SCSI_LOGGING,                   \
 155                          shost_printk(kern_level, host, fmt, ##args);)
 156
 157 #define FNIC_ISR_DBG(kern_level, host, fmt, args...)            \
 158         FNIC_CHECK_LOGGING(FNIC_ISR_LOGGING,                    \
 159                          shost_printk(kern_level, host, fmt, ##args);)
 160
 161 #define FNIC_MAIN_NOTE(kern_level, host, fmt, args...)          \
 162         shost_printk(kern_level, host, fmt, ##args)
 163
 164 extern const char *fnic_state_str[];
 165
 166 enum fnic_intx_intr_index {
 167         FNIC_INTX_WQ_RQ_COPYWQ,
 168         FNIC_INTX_ERR,
 169         FNIC_INTX_NOTIFY,
 170         FNIC_INTX_INTR_MAX,
 171 };
 172
 173 enum fnic_msix_intr_index {
 174         FNIC_MSIX_RQ,
 175         FNIC_MSIX_WQ,
 176         FNIC_MSIX_WQ_COPY,
 177         FNIC_MSIX_ERR_NOTIFY,
 178         FNIC_MSIX_INTR_MAX,
 179 };
 180
 181 struct fnic_msix_entry {
 182         int requested;
 183         char devname[IFNAMSIZ];
 184         irqreturn_t (*isr)(int, void *);
 185         void *devid;
 186 };
 187
 188 enum fnic_state {
 189         FNIC_IN_FC_MODE = 0,
 190         FNIC_IN_FC_TRANS_ETH_MODE,
 191         FNIC_IN_ETH_MODE,
 192         FNIC_IN_ETH_TRANS_FC_MODE,
 193 };
 194
 195 #define FNIC_WQ_COPY_MAX 1
 196 #define FNIC_WQ_MAX 1
 197 #define FNIC_RQ_MAX 1
 198 #define FNIC_CQ_MAX (FNIC_WQ_COPY_MAX + FNIC_WQ_MAX + FNIC_RQ_MAX)
 199
 200 struct mempool;
 201
 202 enum fnic_evt {
 203         FNIC_EVT_START_VLAN_DISC = 1,
 204         FNIC_EVT_START_FCF_DISC = 2,
 205         FNIC_EVT_MAX,
 206 };
 207
 208 struct fnic_event {
 209         struct list_head list;
 210         struct fnic *fnic;
 211         enum fnic_evt event;
 212 };
 213
 214 /* Per-instance private data structure */
 215 struct fnic {
 216         struct fc_lport *lport;
 217         struct fcoe_ctlr ctlr;          /* FIP FCoE controller structure */
 218         struct vnic_dev_bar bar0;
 219
 220         struct msix_entry msix_entry[FNIC_MSIX_INTR_MAX];
 221         struct fnic_msix_entry msix[FNIC_MSIX_INTR_MAX];
 222
 223         struct vnic_stats *stats;
 224         unsigned long stats_time;       /* time of stats update */
 225         unsigned long stats_reset_time; /* time of stats reset */
 226         struct vnic_nic_cfg *nic_cfg;
 227         char name[IFNAMSIZ];
 228         struct timer_list notify_timer; /* used for MSI interrupts */
 229
 230         unsigned int fnic_max_tag_id;
 231         unsigned int err_intr_offset;
 232         unsigned int link_intr_offset;
 233
 234         unsigned int wq_count;
 235         unsigned int cq_count;
 236
 237         struct dentry *fnic_stats_debugfs_host;
 238         struct dentry *fnic_stats_debugfs_file;
 239         struct dentry *fnic_reset_debugfs_file;
 240         unsigned int reset_stats;
 241         atomic64_t io_cmpl_skip;
 242         struct fnic_stats fnic_stats;
 243
 244         u32 vlan_hw_insert:1;           /* let hw insert the tag */
 245         u32 in_remove:1;                /* fnic device in removal */
 246         u32 stop_rx_link_events:1;      /* stop proc. rx frames, link events */
 247
 248         struct completion *remove_wait; /* device remove thread blocks */
 249
 250         atomic_t in_flight;             /* io counter */
 251         bool internal_reset_inprogress;
 252         u32 _reserved;                  /* fill hole */
 253         unsigned long state_flags;      /* protected by host lock */
 254         enum fnic_state state;
 255         spinlock_t fnic_lock;
 256
 257         u16 vlan_id;                    /* VLAN tag including priority */
 258         u8 data_src_addr[ETH_ALEN];
 259         u64 fcp_input_bytes;            /* internal statistic */
 260         u64 fcp_output_bytes;           /* internal statistic */
 261         u32 link_down_cnt;
 262         int link_status;
 263
 264         struct list_head list;
 265         struct pci_dev *pdev;
 266         struct vnic_fc_config config;
 267         struct vnic_dev *vdev;
 268         unsigned int raw_wq_count;
 269         unsigned int wq_copy_count;
 270         unsigned int rq_count;
 271         int fw_ack_index[FNIC_WQ_COPY_MAX];
 272         unsigned short fw_ack_recd[FNIC_WQ_COPY_MAX];
 273         unsigned short wq_copy_desc_low[FNIC_WQ_COPY_MAX];
 274         unsigned int intr_count;
 275         u32 __iomem *legacy_pba;
 276         struct fnic_host_tag *tags;
 277         mempool_t *io_req_pool;
 278         mempool_t *io_sgl_pool[FNIC_SGL_NUM_CACHES];
 279         spinlock_t io_req_lock[FNIC_IO_LOCKS];  /* locks for scsi cmnds */
 280
 281         struct work_struct link_work;
 282         struct work_struct frame_work;
 283         struct sk_buff_head frame_queue;
 284         struct sk_buff_head tx_queue;
 285
 286         /*** FIP related data members  -- start ***/
 287         void (*set_vlan)(struct fnic *, u16 vlan);
 288         struct work_struct      fip_frame_work;
 289         struct sk_buff_head     fip_frame_queue;
 290         struct timer_list       fip_timer;
 291         struct list_head        vlans;
 292         spinlock_t              vlans_lock;
 293
 294         struct work_struct      event_work;
 295         struct list_head        evlist;
 296         /*** FIP related data members  -- end ***/
 297
 298         /* copy work queue cache line section */
 299         ____cacheline_aligned struct vnic_wq_copy wq_copy[FNIC_WQ_COPY_MAX];
 300         /* completion queue cache line section */
 301         ____cacheline_aligned struct vnic_cq cq[FNIC_CQ_MAX];
 302
 303         spinlock_t wq_copy_lock[FNIC_WQ_COPY_MAX];
 304
 305         /* work queue cache line section */
 306         ____cacheline_aligned struct vnic_wq wq[FNIC_WQ_MAX];
 307         spinlock_t wq_lock[FNIC_WQ_MAX];
 308
 309         /* receive queue cache line section */
 310         ____cacheline_aligned struct vnic_rq rq[FNIC_RQ_MAX];
 311
 312         /* interrupt resource cache line section */
 313         ____cacheline_aligned struct vnic_intr intr[FNIC_MSIX_INTR_MAX];
 314 };
 315
 316 static inline struct fnic *fnic_from_ctlr(struct fcoe_ctlr *fip)
 317 {
 318         return container_of(fip, struct fnic, ctlr);
 319 }
 320
 321 extern struct workqueue_struct *fnic_event_queue;
 322 extern struct workqueue_struct *fnic_fip_queue;
 323 extern struct device_attribute *fnic_attrs[];
 324
 325 void fnic_clear_intr_mode(struct fnic *fnic);
 326 int fnic_set_intr_mode(struct fnic *fnic);
 327 void fnic_free_intr(struct fnic *fnic);
 328 int fnic_request_intr(struct fnic *fnic);
 329
 330 int fnic_send(struct fc_lport *, struct fc_frame *);
 331 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf);
 332 void fnic_handle_frame(struct work_struct *work);
 333 void fnic_handle_link(struct work_struct *work);
 334 void fnic_handle_event(struct work_struct *work);
 335 int fnic_rq_cmpl_handler(struct fnic *fnic, int);
 336 int fnic_alloc_rq_frame(struct vnic_rq *rq);
 337 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf);
 338 void fnic_flush_tx(struct fnic *);
 339 void fnic_eth_send(struct fcoe_ctlr *, struct sk_buff *skb);
 340 void fnic_set_port_id(struct fc_lport *, u32, struct fc_frame *);
 341 void fnic_update_mac(struct fc_lport *, u8 *new);
 342 void fnic_update_mac_locked(struct fnic *, u8 *new);
 343
 344 int fnic_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
 345 int fnic_abort_cmd(struct scsi_cmnd *);
 346 int fnic_device_reset(struct scsi_cmnd *);
 347 int fnic_host_reset(struct scsi_cmnd *);
 348 int fnic_reset(struct Scsi_Host *);
 349 void fnic_scsi_cleanup(struct fc_lport *);
 350 void fnic_scsi_abort_io(struct fc_lport *);
 351 void fnic_empty_scsi_cleanup(struct fc_lport *);
 352 void fnic_exch_mgr_reset(struct fc_lport *, u32, u32);
 353 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int);
 354 int fnic_wq_cmpl_handler(struct fnic *fnic, int);
 355 int fnic_flogi_reg_handler(struct fnic *fnic, u32);
 356 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
 357                                   struct fcpio_host_req *desc);
 358 int fnic_fw_reset_handler(struct fnic *fnic);
 359 void fnic_terminate_rport_io(struct fc_rport *);
 360 const char *fnic_state_to_str(unsigned int state);
 361
 362 void fnic_log_q_error(struct fnic *fnic);
 363 void fnic_handle_link_event(struct fnic *fnic);
 364
 365 int fnic_is_abts_pending(struct fnic *, struct scsi_cmnd *);
 366
 367 void fnic_handle_fip_frame(struct work_struct *work);
 368 void fnic_handle_fip_event(struct fnic *fnic);
 369 void fnic_fcoe_reset_vlans(struct fnic *fnic);
 370 void fnic_fcoe_evlist_free(struct fnic *fnic);
 371 extern void fnic_handle_fip_timer(struct fnic *fnic);
 372
 373 static inline int
 374 fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
 375 {
 376         return ((fnic->state_flags & st_flags) == st_flags);
 377 }
 378 void __fnic_set_state_flags(struct fnic *, unsigned long, unsigned long);
 379 void fnic_dump_fchost_stats(struct Scsi_Host *, struct fc_host_statistics *);
 380 #endif /* _FNIC_H_ */