release/src-rt-6.x.4708/linux/linux-2.6.36/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 "vnic_dev.h"
  30 #include "vnic_wq.h"
  31 #include "vnic_rq.h"
  32 #include "vnic_cq.h"
  33 #include "vnic_wq_copy.h"
  34 #include "vnic_intr.h"
  35 #include "vnic_stats.h"
  36 #include "vnic_scsi.h"
  37
  38 #define DRV_NAME                "fnic"
  39 #define DRV_DESCRIPTION         "Cisco FCoE HBA Driver"
  40 #define DRV_VERSION             "1.4.0.145"
  41 #define PFX                     DRV_NAME ": "
  42 #define DFX                     DRV_NAME "%d: "
  43
  44 #define DESC_CLEAN_LOW_WATERMARK 8
  45 #define FNIC_MAX_IO_REQ         2048 /* scsi_cmnd tag map entries */
  46 #define FNIC_IO_LOCKS           64 /* IO locks: power of 2 */
  47 #define FNIC_DFLT_QUEUE_DEPTH   32
  48 #define FNIC_STATS_RATE_LIMIT   4 /* limit rate at which stats are pulled up */
  49
  50 /*
  51  * Tag bits used for special requests.
  52  */
  53 #define FNIC_TAG_ABORT          BIT(30)         /* tag bit indicating abort */
  54 #define FNIC_TAG_DEV_RST        BIT(29)         /* indicates device reset */
  55 #define FNIC_TAG_MASK           (BIT(24) - 1)   /* mask for lookup */
  56 #define FNIC_NO_TAG             -1
  57
  58 /*
  59  * Usage of the scsi_cmnd scratchpad.
  60  * These fields are locked by the hashed io_req_lock.
  61  */
  62 #define CMD_SP(Cmnd)            ((Cmnd)->SCp.ptr)
  63 #define CMD_STATE(Cmnd)         ((Cmnd)->SCp.phase)
  64 #define CMD_ABTS_STATUS(Cmnd)   ((Cmnd)->SCp.Message)
  65 #define CMD_LR_STATUS(Cmnd)     ((Cmnd)->SCp.have_data_in)
  66 #define CMD_TAG(Cmnd)           ((Cmnd)->SCp.sent_command)
  67
  68 #define FCPIO_INVALID_CODE 0x100 /* hdr_status value unused by firmware */
  69
  70 #define FNIC_LUN_RESET_TIMEOUT       10000      /* mSec */
  71 #define FNIC_HOST_RESET_TIMEOUT      10000      /* mSec */
  72 #define FNIC_RMDEVICE_TIMEOUT        1000       /* mSec */
  73 #define FNIC_HOST_RESET_SETTLE_TIME  30         /* Sec */
  74
  75 #define FNIC_MAX_FCP_TARGET     256
  76
  77 extern unsigned int fnic_log_level;
  78
  79 #define FNIC_MAIN_LOGGING 0x01
  80 #define FNIC_FCS_LOGGING 0x02
  81 #define FNIC_SCSI_LOGGING 0x04
  82 #define FNIC_ISR_LOGGING 0x08
  83
  84 #define FNIC_CHECK_LOGGING(LEVEL, CMD)                          \
  85 do {                                                            \
  86         if (unlikely(fnic_log_level & LEVEL))                   \
  87                 do {                                            \
  88                         CMD;                                    \
  89                 } while (0);                                    \
  90 } while (0)
  91
  92 #define FNIC_MAIN_DBG(kern_level, host, fmt, args...)           \
  93         FNIC_CHECK_LOGGING(FNIC_MAIN_LOGGING,                   \
  94                          shost_printk(kern_level, host, fmt, ##args);)
  95
  96 #define FNIC_FCS_DBG(kern_level, host, fmt, args...)            \
  97         FNIC_CHECK_LOGGING(FNIC_FCS_LOGGING,                    \
  98                          shost_printk(kern_level, host, fmt, ##args);)
  99
 100 #define FNIC_SCSI_DBG(kern_level, host, fmt, args...)           \
 101         FNIC_CHECK_LOGGING(FNIC_SCSI_LOGGING,                   \
 102                          shost_printk(kern_level, host, fmt, ##args);)
 103
 104 #define FNIC_ISR_DBG(kern_level, host, fmt, args...)            \
 105         FNIC_CHECK_LOGGING(FNIC_ISR_LOGGING,                    \
 106                          shost_printk(kern_level, host, fmt, ##args);)
 107
 108 extern const char *fnic_state_str[];
 109
 110 enum fnic_intx_intr_index {
 111         FNIC_INTX_WQ_RQ_COPYWQ,
 112         FNIC_INTX_ERR,
 113         FNIC_INTX_NOTIFY,
 114         FNIC_INTX_INTR_MAX,
 115 };
 116
 117 enum fnic_msix_intr_index {
 118         FNIC_MSIX_RQ,
 119         FNIC_MSIX_WQ,
 120         FNIC_MSIX_WQ_COPY,
 121         FNIC_MSIX_ERR_NOTIFY,
 122         FNIC_MSIX_INTR_MAX,
 123 };
 124
 125 struct fnic_msix_entry {
 126         int requested;
 127         char devname[IFNAMSIZ];
 128         irqreturn_t (*isr)(int, void *);
 129         void *devid;
 130 };
 131
 132 enum fnic_state {
 133         FNIC_IN_FC_MODE = 0,
 134         FNIC_IN_FC_TRANS_ETH_MODE,
 135         FNIC_IN_ETH_MODE,
 136         FNIC_IN_ETH_TRANS_FC_MODE,
 137 };
 138
 139 #define FNIC_WQ_COPY_MAX 1
 140 #define FNIC_WQ_MAX 1
 141 #define FNIC_RQ_MAX 1
 142 #define FNIC_CQ_MAX (FNIC_WQ_COPY_MAX + FNIC_WQ_MAX + FNIC_RQ_MAX)
 143
 144 struct mempool;
 145
 146 /* Per-instance private data structure */
 147 struct fnic {
 148         struct fc_lport *lport;
 149         struct fcoe_ctlr ctlr;          /* FIP FCoE controller structure */
 150         struct vnic_dev_bar bar0;
 151
 152         struct msix_entry msix_entry[FNIC_MSIX_INTR_MAX];
 153         struct fnic_msix_entry msix[FNIC_MSIX_INTR_MAX];
 154
 155         struct vnic_stats *stats;
 156         unsigned long stats_time;       /* time of stats update */
 157         struct vnic_nic_cfg *nic_cfg;
 158         char name[IFNAMSIZ];
 159         struct timer_list notify_timer; /* used for MSI interrupts */
 160
 161         unsigned int err_intr_offset;
 162         unsigned int link_intr_offset;
 163
 164         unsigned int wq_count;
 165         unsigned int cq_count;
 166
 167         u32 vlan_hw_insert:1;           /* let hw insert the tag */
 168         u32 in_remove:1;                /* fnic device in removal */
 169         u32 stop_rx_link_events:1;      /* stop proc. rx frames, link events */
 170
 171         struct completion *remove_wait; /* device remove thread blocks */
 172
 173         enum fnic_state state;
 174         spinlock_t fnic_lock;
 175
 176         u16 vlan_id;                    /* VLAN tag including priority */
 177         u8 data_src_addr[ETH_ALEN];
 178         u64 fcp_input_bytes;            /* internal statistic */
 179         u64 fcp_output_bytes;           /* internal statistic */
 180         u32 link_down_cnt;
 181         int link_status;
 182
 183         struct list_head list;
 184         struct pci_dev *pdev;
 185         struct vnic_fc_config config;
 186         struct vnic_dev *vdev;
 187         unsigned int raw_wq_count;
 188         unsigned int wq_copy_count;
 189         unsigned int rq_count;
 190         int fw_ack_index[FNIC_WQ_COPY_MAX];
 191         unsigned short fw_ack_recd[FNIC_WQ_COPY_MAX];
 192         unsigned short wq_copy_desc_low[FNIC_WQ_COPY_MAX];
 193         unsigned int intr_count;
 194         u32 __iomem *legacy_pba;
 195         struct fnic_host_tag *tags;
 196         mempool_t *io_req_pool;
 197         mempool_t *io_sgl_pool[FNIC_SGL_NUM_CACHES];
 198         spinlock_t io_req_lock[FNIC_IO_LOCKS];  /* locks for scsi cmnds */
 199
 200         struct work_struct link_work;
 201         struct work_struct frame_work;
 202         struct sk_buff_head frame_queue;
 203         struct sk_buff_head tx_queue;
 204
 205         /* copy work queue cache line section */
 206         ____cacheline_aligned struct vnic_wq_copy wq_copy[FNIC_WQ_COPY_MAX];
 207         /* completion queue cache line section */
 208         ____cacheline_aligned struct vnic_cq cq[FNIC_CQ_MAX];
 209
 210         spinlock_t wq_copy_lock[FNIC_WQ_COPY_MAX];
 211
 212         /* work queue cache line section */
 213         ____cacheline_aligned struct vnic_wq wq[FNIC_WQ_MAX];
 214         spinlock_t wq_lock[FNIC_WQ_MAX];
 215
 216         /* receive queue cache line section */
 217         ____cacheline_aligned struct vnic_rq rq[FNIC_RQ_MAX];
 218
 219         /* interrupt resource cache line section */
 220         ____cacheline_aligned struct vnic_intr intr[FNIC_MSIX_INTR_MAX];
 221 };
 222
 223 static inline struct fnic *fnic_from_ctlr(struct fcoe_ctlr *fip)
 224 {
 225         return container_of(fip, struct fnic, ctlr);
 226 }
 227
 228 extern struct workqueue_struct *fnic_event_queue;
 229 extern struct device_attribute *fnic_attrs[];
 230
 231 void fnic_clear_intr_mode(struct fnic *fnic);
 232 int fnic_set_intr_mode(struct fnic *fnic);
 233 void fnic_free_intr(struct fnic *fnic);
 234 int fnic_request_intr(struct fnic *fnic);
 235
 236 int fnic_send(struct fc_lport *, struct fc_frame *);
 237 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf);
 238 void fnic_handle_frame(struct work_struct *work);
 239 void fnic_handle_link(struct work_struct *work);
 240 int fnic_rq_cmpl_handler(struct fnic *fnic, int);
 241 int fnic_alloc_rq_frame(struct vnic_rq *rq);
 242 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf);
 243 void fnic_flush_tx(struct fnic *);
 244 void fnic_eth_send(struct fcoe_ctlr *, struct sk_buff *skb);
 245 void fnic_set_port_id(struct fc_lport *, u32, struct fc_frame *);
 246 void fnic_update_mac(struct fc_lport *, u8 *new);
 247 void fnic_update_mac_locked(struct fnic *, u8 *new);
 248
 249 int fnic_queuecommand(struct scsi_cmnd *, void (*done)(struct scsi_cmnd *));
 250 int fnic_abort_cmd(struct scsi_cmnd *);
 251 int fnic_device_reset(struct scsi_cmnd *);
 252 int fnic_host_reset(struct scsi_cmnd *);
 253 int fnic_reset(struct Scsi_Host *);
 254 void fnic_scsi_cleanup(struct fc_lport *);
 255 void fnic_scsi_abort_io(struct fc_lport *);
 256 void fnic_empty_scsi_cleanup(struct fc_lport *);
 257 void fnic_exch_mgr_reset(struct fc_lport *, u32, u32);
 258 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int);
 259 int fnic_wq_cmpl_handler(struct fnic *fnic, int);
 260 int fnic_flogi_reg_handler(struct fnic *fnic, u32);
 261 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
 262                                   struct fcpio_host_req *desc);
 263 int fnic_fw_reset_handler(struct fnic *fnic);
 264 void fnic_terminate_rport_io(struct fc_rport *);
 265 const char *fnic_state_to_str(unsigned int state);
 266
 267 void fnic_log_q_error(struct fnic *fnic);
 268 void fnic_handle_link_event(struct fnic *fnic);
 269
 270 #endif /* _FNIC_H_ */