drivers/scsi/qedi/qedi.h

   1 /*
   2  * QLogic iSCSI Offload Driver
   3  * Copyright (c) 2016 Cavium Inc.
   4  *
   5  * This software is available under the terms of the GNU General Public License
   6  * (GPL) Version 2, available from the file COPYING in the main directory of
   7  * this source tree.
   8  */
   9
  10 #ifndef _QEDI_H_
  11 #define _QEDI_H_
  12
  13 #define __PREVENT_QED_HSI__
  14
  15 #include <scsi/scsi_transport_iscsi.h>
  16 #include <scsi/libiscsi.h>
  17 #include <scsi/scsi_host.h>
  18 #include <linux/uio_driver.h>
  19
  20 #include "qedi_hsi.h"
  21 #include <linux/qed/qed_if.h>
  22 #include "qedi_dbg.h"
  23 #include <linux/qed/qed_iscsi_if.h>
  24 #include <linux/qed/qed_ll2_if.h>
  25 #include "qedi_version.h"
  26 #include "qedi_nvm_iscsi_cfg.h"
  27
  28 #define QEDI_MODULE_NAME                "qedi"
  29
  30 struct qedi_endpoint;
  31
  32 #ifndef GET_FIELD2
  33 #define GET_FIELD2(value, name) \
  34         (((value) & (name ## _MASK)) >> (name ## _OFFSET))
  35 #endif
  36
  37 /*
  38  * PCI function probe defines
  39  */
  40 #define QEDI_MODE_NORMAL        0
  41 #define QEDI_MODE_RECOVERY      1
  42
  43 #define ISCSI_WQE_SET_PTU_INVALIDATE    1
  44 #define QEDI_MAX_ISCSI_TASK             4096
  45 #define QEDI_MAX_TASK_NUM               0x0FFF
  46 #define QEDI_MAX_ISCSI_CONNS_PER_HBA    1024
  47 #define QEDI_ISCSI_MAX_BDS_PER_CMD      255     /* Firmware max BDs is 255 */
  48 #define MAX_OUTSTANDING_TASKS_PER_CON   1024
  49
  50 #define QEDI_MAX_BD_LEN         0xffff
  51 #define QEDI_BD_SPLIT_SZ        0x1000
  52 #define QEDI_PAGE_SIZE          4096
  53 #define QEDI_FAST_SGE_COUNT     4
  54 /* MAX Length for cached SGL */
  55 #define MAX_SGLEN_FOR_CACHESGL  ((1U << 16) - 1)
  56
  57 #define MIN_NUM_CPUS_MSIX(x)    min_t(u32, x->dev_info.num_cqs, \
  58                                         num_online_cpus())
  59
  60 #define QEDI_LOCAL_PORT_MIN     60000
  61 #define QEDI_LOCAL_PORT_MAX     61024
  62 #define QEDI_LOCAL_PORT_RANGE   (QEDI_LOCAL_PORT_MAX - QEDI_LOCAL_PORT_MIN)
  63 #define QEDI_LOCAL_PORT_INVALID 0xffff
  64 #define TX_RX_RING              16
  65 #define RX_RING                 (TX_RX_RING - 1)
  66 #define QEDI_PAGE_ALIGN(addr)   ALIGN(addr, QEDI_PAGE_SIZE)
  67 #define QEDI_PAGE_MASK          (~((QEDI_PAGE_SIZE) - 1))
  68
  69 #define QEDI_HW_DMA_BOUNDARY    0xfff
  70 #define QEDI_PATH_HANDLE        0xFE0000000UL
  71
  72 enum qedi_nvm_tgts {
  73         QEDI_NVM_TGT_PRI,
  74         QEDI_NVM_TGT_SEC,
  75 };
  76
  77 struct qedi_nvm_iscsi_image {
  78         struct nvm_iscsi_cfg iscsi_cfg;
  79         u32 crc;
  80 };
  81
  82 struct qedi_uio_ctrl {
  83         /* meta data */
  84         u32 uio_hsi_version;
  85
  86         /* user writes */
  87         u32 host_tx_prod;
  88         u32 host_rx_cons;
  89         u32 host_rx_bd_cons;
  90         u32 host_tx_pkt_len;
  91         u32 host_rx_cons_cnt;
  92
  93         /* driver writes */
  94         u32 hw_tx_cons;
  95         u32 hw_rx_prod;
  96         u32 hw_rx_bd_prod;
  97         u32 hw_rx_prod_cnt;
  98
  99         /* other */
 100         u8 mac_addr[6];
 101         u8 reserve[2];
 102 };
 103
 104 struct qedi_rx_bd {
 105         u32 rx_pkt_index;
 106         u32 rx_pkt_len;
 107         u16 vlan_id;
 108 };
 109
 110 #define QEDI_RX_DESC_CNT        (QEDI_PAGE_SIZE / sizeof(struct qedi_rx_bd))
 111 #define QEDI_MAX_RX_DESC_CNT    (QEDI_RX_DESC_CNT - 1)
 112 #define QEDI_NUM_RX_BD          (QEDI_RX_DESC_CNT * 1)
 113 #define QEDI_MAX_RX_BD          (QEDI_NUM_RX_BD - 1)
 114
 115 #define QEDI_NEXT_RX_IDX(x)     ((((x) & (QEDI_MAX_RX_DESC_CNT)) ==     \
 116                                   (QEDI_MAX_RX_DESC_CNT - 1)) ?         \
 117                                  (x) + 2 : (x) + 1)
 118
 119 struct qedi_uio_dev {
 120         struct uio_info         qedi_uinfo;
 121         u32                     uio_dev;
 122         struct list_head        list;
 123
 124         u32                     ll2_ring_size;
 125         void                    *ll2_ring;
 126
 127         u32                     ll2_buf_size;
 128         void                    *ll2_buf;
 129
 130         void                    *rx_pkt;
 131         void                    *tx_pkt;
 132
 133         struct qedi_ctx         *qedi;
 134         struct pci_dev          *pdev;
 135         void                    *uctrl;
 136 };
 137
 138 /* List to maintain the skb pointers */
 139 struct skb_work_list {
 140         struct list_head list;
 141         struct sk_buff *skb;
 142         u16 vlan_id;
 143 };
 144
 145 /* Queue sizes in number of elements */
 146 #define QEDI_SQ_SIZE            MAX_OUTSTANDING_TASKS_PER_CON
 147 #define QEDI_CQ_SIZE            2048
 148 #define QEDI_CMDQ_SIZE          QEDI_MAX_ISCSI_TASK
 149 #define QEDI_PROTO_CQ_PROD_IDX  0
 150
 151 struct qedi_glbl_q_params {
 152         u64 hw_p_cq;    /* Completion queue PBL */
 153         u64 hw_p_rq;    /* Request queue PBL */
 154         u64 hw_p_cmdq;  /* Command queue PBL */
 155 };
 156
 157 struct global_queue {
 158         union iscsi_cqe *cq;
 159         dma_addr_t cq_dma;
 160         u32 cq_mem_size;
 161         u32 cq_cons_idx; /* Completion queue consumer index */
 162
 163         void *cq_pbl;
 164         dma_addr_t cq_pbl_dma;
 165         u32 cq_pbl_size;
 166
 167 };
 168
 169 struct qedi_fastpath {
 170         struct qed_sb_info      *sb_info;
 171         u16                     sb_id;
 172 #define QEDI_NAME_SIZE          16
 173         char                    name[QEDI_NAME_SIZE];
 174         struct qedi_ctx         *qedi;
 175 };
 176
 177 /* Used to pass fastpath information needed to process CQEs */
 178 struct qedi_io_work {
 179         struct list_head list;
 180         struct iscsi_cqe_solicited cqe;
 181         u16     que_idx;
 182 };
 183
 184 /**
 185  * struct iscsi_cid_queue - Per adapter iscsi cid queue
 186  *
 187  * @cid_que_base:           queue base memory
 188  * @cid_que:                queue memory pointer
 189  * @cid_q_prod_idx:         produce index
 190  * @cid_q_cons_idx:         consumer index
 191  * @cid_q_max_idx:          max index. used to detect wrap around condition
 192  * @cid_free_cnt:           queue size
 193  * @conn_cid_tbl:           iscsi cid to conn structure mapping table
 194  *
 195  * Per adapter iSCSI CID Queue
 196  */
 197 struct iscsi_cid_queue {
 198         void *cid_que_base;
 199         u32 *cid_que;
 200         u32 cid_q_prod_idx;
 201         u32 cid_q_cons_idx;
 202         u32 cid_q_max_idx;
 203         u32 cid_free_cnt;
 204         struct qedi_conn **conn_cid_tbl;
 205 };
 206
 207 struct qedi_portid_tbl {
 208         spinlock_t      lock;   /* Port id lock */
 209         u16             start;
 210         u16             max;
 211         u16             next;
 212         unsigned long   *table;
 213 };
 214
 215 struct qedi_itt_map {
 216         __le32  itt;
 217         struct qedi_cmd *p_cmd;
 218 };
 219
 220 /* I/O tracing entry */
 221 #define QEDI_IO_TRACE_SIZE             2048
 222 struct qedi_io_log {
 223 #define QEDI_IO_TRACE_REQ              0
 224 #define QEDI_IO_TRACE_RSP              1
 225         u8 direction;
 226         u16 task_id;
 227         u32 cid;
 228         u32 port_id;    /* Remote port fabric ID */
 229         int lun;
 230         u8 op;          /* SCSI CDB */
 231         u8 lba[4];
 232         unsigned int bufflen;   /* SCSI buffer length */
 233         unsigned int sg_count;  /* Number of SG elements */
 234         u8 fast_sgs;            /* number of fast sgls */
 235         u8 slow_sgs;            /* number of slow sgls */
 236         u8 cached_sgs;          /* number of cached sgls */
 237         int result;             /* Result passed back to mid-layer */
 238         unsigned long jiffies;  /* Time stamp when I/O logged */
 239         int refcount;           /* Reference count for task id */
 240         unsigned int blk_req_cpu; /* CPU that the task is queued on by
 241                                    * blk layer
 242                                    */
 243         unsigned int req_cpu;   /* CPU that the task is queued on */
 244         unsigned int intr_cpu;  /* Interrupt CPU that the task is received on */
 245         unsigned int blk_rsp_cpu;/* CPU that task is actually processed and
 246                                   * returned to blk layer
 247                                   */
 248         bool cached_sge;
 249         bool slow_sge;
 250         bool fast_sge;
 251 };
 252
 253 /* Number of entries in BDQ */
 254 #define QEDI_BDQ_NUM            256
 255 #define QEDI_BDQ_BUF_SIZE       256
 256
 257 /* DMA coherent buffers for BDQ */
 258 struct qedi_bdq_buf {
 259         void *buf_addr;
 260         dma_addr_t buf_dma;
 261 };
 262
 263 /* Main port level struct */
 264 struct qedi_ctx {
 265         struct qedi_dbg_ctx dbg_ctx;
 266         struct Scsi_Host *shost;
 267         struct pci_dev *pdev;
 268         struct qed_dev *cdev;
 269         struct qed_dev_iscsi_info dev_info;
 270         struct qed_int_info int_info;
 271         struct qedi_glbl_q_params *p_cpuq;
 272         struct global_queue **global_queues;
 273         /* uio declaration */
 274         struct qedi_uio_dev *udev;
 275         struct list_head ll2_skb_list;
 276         spinlock_t ll2_lock;    /* Light L2 lock */
 277         spinlock_t hba_lock;    /* per port lock */
 278         struct task_struct *ll2_recv_thread;
 279         unsigned long flags;
 280 #define UIO_DEV_OPENED          1
 281 #define QEDI_IOTHREAD_WAKE      2
 282 #define QEDI_IN_RECOVERY        5
 283 #define QEDI_IN_OFFLINE         6
 284
 285         u8 mac[ETH_ALEN];
 286         u32 src_ip[4];
 287         u8 ip_type;
 288
 289         /* Physical address of above array */
 290         dma_addr_t hw_p_cpuq;
 291
 292         struct qedi_bdq_buf bdq[QEDI_BDQ_NUM];
 293         void *bdq_pbl;
 294         dma_addr_t bdq_pbl_dma;
 295         size_t bdq_pbl_mem_size;
 296         void *bdq_pbl_list;
 297         dma_addr_t bdq_pbl_list_dma;
 298         u8 bdq_pbl_list_num_entries;
 299         struct qedi_nvm_iscsi_image *iscsi_image;
 300         dma_addr_t nvm_buf_dma;
 301         void __iomem *bdq_primary_prod;
 302         void __iomem *bdq_secondary_prod;
 303         u16 bdq_prod_idx;
 304         u16 rq_num_entries;
 305
 306         u32 max_sqes;
 307         u8 num_queues;
 308         u32 max_active_conns;
 309
 310         struct iscsi_cid_queue cid_que;
 311         struct qedi_endpoint **ep_tbl;
 312         struct qedi_portid_tbl lcl_port_tbl;
 313
 314         /* Rx fast path intr context */
 315         struct qed_sb_info      *sb_array;
 316         struct qedi_fastpath    *fp_array;
 317         struct qed_iscsi_tid    tasks;
 318
 319 #define QEDI_LINK_DOWN          0
 320 #define QEDI_LINK_UP            1
 321         atomic_t link_state;
 322
 323 #define QEDI_RESERVE_TASK_ID    0
 324 #define MAX_ISCSI_TASK_ENTRIES  4096
 325 #define QEDI_INVALID_TASK_ID    (MAX_ISCSI_TASK_ENTRIES + 1)
 326         unsigned long task_idx_map[MAX_ISCSI_TASK_ENTRIES / BITS_PER_LONG];
 327         struct qedi_itt_map *itt_map;
 328         u16 tid_reuse_count[QEDI_MAX_ISCSI_TASK];
 329         struct qed_pf_params pf_params;
 330
 331         struct workqueue_struct *tmf_thread;
 332         struct workqueue_struct *offload_thread;
 333
 334         u16 ll2_mtu;
 335
 336         struct workqueue_struct *dpc_wq;
 337
 338         spinlock_t task_idx_lock;       /* To protect gbl context */
 339         s32 last_tidx_alloc;
 340         s32 last_tidx_clear;
 341
 342         struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE];
 343         spinlock_t io_trace_lock;       /* prtect trace Log buf */
 344         u16 io_trace_idx;
 345         unsigned int intr_cpu;
 346         u32 cached_sgls;
 347         bool use_cached_sge;
 348         u32 slow_sgls;
 349         bool use_slow_sge;
 350         u32 fast_sgls;
 351         bool use_fast_sge;
 352
 353         atomic_t num_offloads;
 354 #define SYSFS_FLAG_FW_SEL_BOOT 2
 355 #define IPV6_LEN        41
 356 #define IPV4_LEN        17
 357         struct iscsi_boot_kset *boot_kset;
 358
 359         /* Used for iscsi statistics */
 360         struct mutex stats_lock;
 361 };
 362
 363 struct qedi_work {
 364         struct list_head list;
 365         struct qedi_ctx *qedi;
 366         union iscsi_cqe cqe;
 367         u16     que_idx;
 368         bool is_solicited;
 369 };
 370
 371 struct qedi_percpu_s {
 372         struct task_struct *iothread;
 373         struct list_head work_list;
 374         spinlock_t p_work_lock;         /* Per cpu worker lock */
 375 };
 376
 377 static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid)
 378 {
 379         return (info->blocks[tid / info->num_tids_per_block] +
 380                 (tid % info->num_tids_per_block) * info->size);
 381 }
 382
 383 #define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32))
 384 #define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))
 385
 386 #endif /* _QEDI_H_ */