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_OUSTANDING_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 LL2_SINGLE_BUF_SIZE     0x400
  67 #define QEDI_PAGE_SIZE          4096
  68 #define QEDI_PAGE_ALIGN(addr)   ALIGN(addr, QEDI_PAGE_SIZE)
  69 #define QEDI_PAGE_MASK          (~((QEDI_PAGE_SIZE) - 1))
  70
  71 #define QEDI_PAGE_SIZE          4096
  72 #define QEDI_HW_DMA_BOUNDARY    0xfff
  73 #define QEDI_PATH_HANDLE        0xFE0000000UL
  74
  75 enum qedi_nvm_tgts {
  76         QEDI_NVM_TGT_PRI,
  77         QEDI_NVM_TGT_SEC,
  78 };
  79
  80 struct qedi_uio_ctrl {
  81         /* meta data */
  82         u32 uio_hsi_version;
  83
  84         /* user writes */
  85         u32 host_tx_prod;
  86         u32 host_rx_cons;
  87         u32 host_rx_bd_cons;
  88         u32 host_tx_pkt_len;
  89         u32 host_rx_cons_cnt;
  90
  91         /* driver writes */
  92         u32 hw_tx_cons;
  93         u32 hw_rx_prod;
  94         u32 hw_rx_bd_prod;
  95         u32 hw_rx_prod_cnt;
  96
  97         /* other */
  98         u8 mac_addr[6];
  99         u8 reserve[2];
 100 };
 101
 102 struct qedi_rx_bd {
 103         u32 rx_pkt_index;
 104         u32 rx_pkt_len;
 105         u16 vlan_id;
 106 };
 107
 108 #define QEDI_RX_DESC_CNT        (QEDI_PAGE_SIZE / sizeof(struct qedi_rx_bd))
 109 #define QEDI_MAX_RX_DESC_CNT    (QEDI_RX_DESC_CNT - 1)
 110 #define QEDI_NUM_RX_BD          (QEDI_RX_DESC_CNT * 1)
 111 #define QEDI_MAX_RX_BD          (QEDI_NUM_RX_BD - 1)
 112
 113 #define QEDI_NEXT_RX_IDX(x)     ((((x) & (QEDI_MAX_RX_DESC_CNT)) ==     \
 114                                   (QEDI_MAX_RX_DESC_CNT - 1)) ?         \
 115                                  (x) + 2 : (x) + 1)
 116
 117 struct qedi_uio_dev {
 118         struct uio_info         qedi_uinfo;
 119         u32                     uio_dev;
 120         struct list_head        list;
 121
 122         u32                     ll2_ring_size;
 123         void                    *ll2_ring;
 124
 125         u32                     ll2_buf_size;
 126         void                    *ll2_buf;
 127
 128         void                    *rx_pkt;
 129         void                    *tx_pkt;
 130
 131         struct qedi_ctx         *qedi;
 132         struct pci_dev          *pdev;
 133         void                    *uctrl;
 134 };
 135
 136 /* List to maintain the skb pointers */
 137 struct skb_work_list {
 138         struct list_head list;
 139         struct sk_buff *skb;
 140         u16 vlan_id;
 141 };
 142
 143 /* Queue sizes in number of elements */
 144 #define QEDI_SQ_SIZE            MAX_OUSTANDING_TASKS_PER_CON
 145 #define QEDI_CQ_SIZE            2048
 146 #define QEDI_CMDQ_SIZE          QEDI_MAX_ISCSI_TASK
 147 #define QEDI_PROTO_CQ_PROD_IDX  0
 148
 149 struct qedi_glbl_q_params {
 150         u64 hw_p_cq;    /* Completion queue PBL */
 151         u64 hw_p_rq;    /* Request queue PBL */
 152         u64 hw_p_cmdq;  /* Command queue PBL */
 153 };
 154
 155 struct global_queue {
 156         union iscsi_cqe *cq;
 157         dma_addr_t cq_dma;
 158         u32 cq_mem_size;
 159         u32 cq_cons_idx; /* Completion queue consumer index */
 160
 161         void *cq_pbl;
 162         dma_addr_t cq_pbl_dma;
 163         u32 cq_pbl_size;
 164
 165 };
 166
 167 struct qedi_fastpath {
 168         struct qed_sb_info      *sb_info;
 169         u16                     sb_id;
 170 #define QEDI_NAME_SIZE          16
 171         char                    name[QEDI_NAME_SIZE];
 172         struct qedi_ctx         *qedi;
 173 };
 174
 175 /* Used to pass fastpath information needed to process CQEs */
 176 struct qedi_io_work {
 177         struct list_head list;
 178         struct iscsi_cqe_solicited cqe;
 179         u16     que_idx;
 180 };
 181
 182 /**
 183  * struct iscsi_cid_queue - Per adapter iscsi cid queue
 184  *
 185  * @cid_que_base:           queue base memory
 186  * @cid_que:                queue memory pointer
 187  * @cid_q_prod_idx:         produce index
 188  * @cid_q_cons_idx:         consumer index
 189  * @cid_q_max_idx:          max index. used to detect wrap around condition
 190  * @cid_free_cnt:           queue size
 191  * @conn_cid_tbl:           iscsi cid to conn structure mapping table
 192  *
 193  * Per adapter iSCSI CID Queue
 194  */
 195 struct iscsi_cid_queue {
 196         void *cid_que_base;
 197         u32 *cid_que;
 198         u32 cid_q_prod_idx;
 199         u32 cid_q_cons_idx;
 200         u32 cid_q_max_idx;
 201         u32 cid_free_cnt;
 202         struct qedi_conn **conn_cid_tbl;
 203 };
 204
 205 struct qedi_portid_tbl {
 206         spinlock_t      lock;   /* Port id lock */
 207         u16             start;
 208         u16             max;
 209         u16             next;
 210         unsigned long   *table;
 211 };
 212
 213 struct qedi_itt_map {
 214         __le32  itt;
 215         struct qedi_cmd *p_cmd;
 216 };
 217
 218 /* I/O tracing entry */
 219 #define QEDI_IO_TRACE_SIZE             2048
 220 struct qedi_io_log {
 221 #define QEDI_IO_TRACE_REQ              0
 222 #define QEDI_IO_TRACE_RSP              1
 223         u8 direction;
 224         u16 task_id;
 225         u32 cid;
 226         u32 port_id;    /* Remote port fabric ID */
 227         int lun;
 228         u8 op;          /* SCSI CDB */
 229         u8 lba[4];
 230         unsigned int bufflen;   /* SCSI buffer length */
 231         unsigned int sg_count;  /* Number of SG elements */
 232         u8 fast_sgs;            /* number of fast sgls */
 233         u8 slow_sgs;            /* number of slow sgls */
 234         u8 cached_sgs;          /* number of cached sgls */
 235         int result;             /* Result passed back to mid-layer */
 236         unsigned long jiffies;  /* Time stamp when I/O logged */
 237         int refcount;           /* Reference count for task id */
 238         unsigned int blk_req_cpu; /* CPU that the task is queued on by
 239                                    * blk layer
 240                                    */
 241         unsigned int req_cpu;   /* CPU that the task is queued on */
 242         unsigned int intr_cpu;  /* Interrupt CPU that the task is received on */
 243         unsigned int blk_rsp_cpu;/* CPU that task is actually processed and
 244                                   * returned to blk layer
 245                                   */
 246         bool cached_sge;
 247         bool slow_sge;
 248         bool fast_sge;
 249 };
 250
 251 /* Number of entries in BDQ */
 252 #define QEDI_BDQ_NUM            256
 253 #define QEDI_BDQ_BUF_SIZE       256
 254
 255 /* DMA coherent buffers for BDQ */
 256 struct qedi_bdq_buf {
 257         void *buf_addr;
 258         dma_addr_t buf_dma;
 259 };
 260
 261 /* Main port level struct */
 262 struct qedi_ctx {
 263         struct qedi_dbg_ctx dbg_ctx;
 264         struct Scsi_Host *shost;
 265         struct pci_dev *pdev;
 266         struct qed_dev *cdev;
 267         struct qed_dev_iscsi_info dev_info;
 268         struct qed_int_info int_info;
 269         struct qedi_glbl_q_params *p_cpuq;
 270         struct global_queue **global_queues;
 271         /* uio declaration */
 272         struct qedi_uio_dev *udev;
 273         struct list_head ll2_skb_list;
 274         spinlock_t ll2_lock;    /* Light L2 lock */
 275         spinlock_t hba_lock;    /* per port lock */
 276         struct task_struct *ll2_recv_thread;
 277         unsigned long flags;
 278 #define UIO_DEV_OPENED          1
 279 #define QEDI_IOTHREAD_WAKE      2
 280 #define QEDI_IN_RECOVERY        5
 281 #define QEDI_IN_OFFLINE         6
 282
 283         u8 mac[ETH_ALEN];
 284         u32 src_ip[4];
 285         u8 ip_type;
 286
 287         /* Physical address of above array */
 288         dma_addr_t hw_p_cpuq;
 289
 290         struct qedi_bdq_buf bdq[QEDI_BDQ_NUM];
 291         void *bdq_pbl;
 292         dma_addr_t bdq_pbl_dma;
 293         size_t bdq_pbl_mem_size;
 294         void *bdq_pbl_list;
 295         dma_addr_t bdq_pbl_list_dma;
 296         u8 bdq_pbl_list_num_entries;
 297         struct nvm_iscsi_cfg *iscsi_cfg;
 298         dma_addr_t nvm_buf_dma;
 299         void __iomem *bdq_primary_prod;
 300         void __iomem *bdq_secondary_prod;
 301         u16 bdq_prod_idx;
 302         u16 rq_num_entries;
 303
 304         u32 max_sqes;
 305         u8 num_queues;
 306         u32 max_active_conns;
 307
 308         struct iscsi_cid_queue cid_que;
 309         struct qedi_endpoint **ep_tbl;
 310         struct qedi_portid_tbl lcl_port_tbl;
 311
 312         /* Rx fast path intr context */
 313         struct qed_sb_info      *sb_array;
 314         struct qedi_fastpath    *fp_array;
 315         struct qed_iscsi_tid    tasks;
 316
 317 #define QEDI_LINK_DOWN          0
 318 #define QEDI_LINK_UP            1
 319         atomic_t link_state;
 320
 321 #define QEDI_RESERVE_TASK_ID    0
 322 #define MAX_ISCSI_TASK_ENTRIES  4096
 323 #define QEDI_INVALID_TASK_ID    (MAX_ISCSI_TASK_ENTRIES + 1)
 324         unsigned long task_idx_map[MAX_ISCSI_TASK_ENTRIES / BITS_PER_LONG];
 325         struct qedi_itt_map *itt_map;
 326         u16 tid_reuse_count[QEDI_MAX_ISCSI_TASK];
 327         struct qed_pf_params pf_params;
 328
 329         struct workqueue_struct *tmf_thread;
 330         struct workqueue_struct *offload_thread;
 331
 332         u16 ll2_mtu;
 333
 334         struct workqueue_struct *dpc_wq;
 335
 336         spinlock_t task_idx_lock;       /* To protect gbl context */
 337         s32 last_tidx_alloc;
 338         s32 last_tidx_clear;
 339
 340         struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE];
 341         spinlock_t io_trace_lock;       /* prtect trace Log buf */
 342         u16 io_trace_idx;
 343         unsigned int intr_cpu;
 344         u32 cached_sgls;
 345         bool use_cached_sge;
 346         u32 slow_sgls;
 347         bool use_slow_sge;
 348         u32 fast_sgls;
 349         bool use_fast_sge;
 350
 351         atomic_t num_offloads;
 352 #define SYSFS_FLAG_FW_SEL_BOOT 2
 353 #define IPV6_LEN        41
 354 #define IPV4_LEN        17
 355         struct iscsi_boot_kset *boot_kset;
 356
 357         /* Used for iscsi statistics */
 358         struct mutex stats_lock;
 359 };
 360
 361 struct qedi_work {
 362         struct list_head list;
 363         struct qedi_ctx *qedi;
 364         union iscsi_cqe cqe;
 365         u16     que_idx;
 366         bool is_solicited;
 367 };
 368
 369 struct qedi_percpu_s {
 370         struct task_struct *iothread;
 371         struct list_head work_list;
 372         spinlock_t p_work_lock;         /* Per cpu worker lock */
 373 };
 374
 375 static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid)
 376 {
 377         return (info->blocks[tid / info->num_tids_per_block] +
 378                 (tid % info->num_tids_per_block) * info->size);
 379 }
 380
 381 #define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32))
 382 #define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))
 383
 384 #endif /* _QEDI_H_ */