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_nvm_iscsi_image {
  81         struct nvm_iscsi_cfg iscsi_cfg;
  82         u32 crc;
  83 };
  84
  85 struct qedi_uio_ctrl {
  86         /* meta data */
  87         u32 uio_hsi_version;
  88
  89         /* user writes */
  90         u32 host_tx_prod;
  91         u32 host_rx_cons;
  92         u32 host_rx_bd_cons;
  93         u32 host_tx_pkt_len;
  94         u32 host_rx_cons_cnt;
  95
  96         /* driver writes */
  97         u32 hw_tx_cons;
  98         u32 hw_rx_prod;
  99         u32 hw_rx_bd_prod;
 100         u32 hw_rx_prod_cnt;
 101
 102         /* other */
 103         u8 mac_addr[6];
 104         u8 reserve[2];
 105 };
 106
 107 struct qedi_rx_bd {
 108         u32 rx_pkt_index;
 109         u32 rx_pkt_len;
 110         u16 vlan_id;
 111 };
 112
 113 #define QEDI_RX_DESC_CNT        (QEDI_PAGE_SIZE / sizeof(struct qedi_rx_bd))
 114 #define QEDI_MAX_RX_DESC_CNT    (QEDI_RX_DESC_CNT - 1)
 115 #define QEDI_NUM_RX_BD          (QEDI_RX_DESC_CNT * 1)
 116 #define QEDI_MAX_RX_BD          (QEDI_NUM_RX_BD - 1)
 117
 118 #define QEDI_NEXT_RX_IDX(x)     ((((x) & (QEDI_MAX_RX_DESC_CNT)) ==     \
 119                                   (QEDI_MAX_RX_DESC_CNT - 1)) ?         \
 120                                  (x) + 2 : (x) + 1)
 121
 122 struct qedi_uio_dev {
 123         struct uio_info         qedi_uinfo;
 124         u32                     uio_dev;
 125         struct list_head        list;
 126
 127         u32                     ll2_ring_size;
 128         void                    *ll2_ring;
 129
 130         u32                     ll2_buf_size;
 131         void                    *ll2_buf;
 132
 133         void                    *rx_pkt;
 134         void                    *tx_pkt;
 135
 136         struct qedi_ctx         *qedi;
 137         struct pci_dev          *pdev;
 138         void                    *uctrl;
 139 };
 140
 141 /* List to maintain the skb pointers */
 142 struct skb_work_list {
 143         struct list_head list;
 144         struct sk_buff *skb;
 145         u16 vlan_id;
 146 };
 147
 148 /* Queue sizes in number of elements */
 149 #define QEDI_SQ_SIZE            MAX_OUSTANDING_TASKS_PER_CON
 150 #define QEDI_CQ_SIZE            2048
 151 #define QEDI_CMDQ_SIZE          QEDI_MAX_ISCSI_TASK
 152 #define QEDI_PROTO_CQ_PROD_IDX  0
 153
 154 struct qedi_glbl_q_params {
 155         u64 hw_p_cq;    /* Completion queue PBL */
 156         u64 hw_p_rq;    /* Request queue PBL */
 157         u64 hw_p_cmdq;  /* Command queue PBL */
 158 };
 159
 160 struct global_queue {
 161         union iscsi_cqe *cq;
 162         dma_addr_t cq_dma;
 163         u32 cq_mem_size;
 164         u32 cq_cons_idx; /* Completion queue consumer index */
 165
 166         void *cq_pbl;
 167         dma_addr_t cq_pbl_dma;
 168         u32 cq_pbl_size;
 169
 170 };
 171
 172 struct qedi_fastpath {
 173         struct qed_sb_info      *sb_info;
 174         u16                     sb_id;
 175 #define QEDI_NAME_SIZE          16
 176         char                    name[QEDI_NAME_SIZE];
 177         struct qedi_ctx         *qedi;
 178 };
 179
 180 /* Used to pass fastpath information needed to process CQEs */
 181 struct qedi_io_work {
 182         struct list_head list;
 183         struct iscsi_cqe_solicited cqe;
 184         u16     que_idx;
 185 };
 186
 187 /**
 188  * struct iscsi_cid_queue - Per adapter iscsi cid queue
 189  *
 190  * @cid_que_base:           queue base memory
 191  * @cid_que:                queue memory pointer
 192  * @cid_q_prod_idx:         produce index
 193  * @cid_q_cons_idx:         consumer index
 194  * @cid_q_max_idx:          max index. used to detect wrap around condition
 195  * @cid_free_cnt:           queue size
 196  * @conn_cid_tbl:           iscsi cid to conn structure mapping table
 197  *
 198  * Per adapter iSCSI CID Queue
 199  */
 200 struct iscsi_cid_queue {
 201         void *cid_que_base;
 202         u32 *cid_que;
 203         u32 cid_q_prod_idx;
 204         u32 cid_q_cons_idx;
 205         u32 cid_q_max_idx;
 206         u32 cid_free_cnt;
 207         struct qedi_conn **conn_cid_tbl;
 208 };
 209
 210 struct qedi_portid_tbl {
 211         spinlock_t      lock;   /* Port id lock */
 212         u16             start;
 213         u16             max;
 214         u16             next;
 215         unsigned long   *table;
 216 };
 217
 218 struct qedi_itt_map {
 219         __le32  itt;
 220         struct qedi_cmd *p_cmd;
 221 };
 222
 223 /* I/O tracing entry */
 224 #define QEDI_IO_TRACE_SIZE             2048
 225 struct qedi_io_log {
 226 #define QEDI_IO_TRACE_REQ              0
 227 #define QEDI_IO_TRACE_RSP              1
 228         u8 direction;
 229         u16 task_id;
 230         u32 cid;
 231         u32 port_id;    /* Remote port fabric ID */
 232         int lun;
 233         u8 op;          /* SCSI CDB */
 234         u8 lba[4];
 235         unsigned int bufflen;   /* SCSI buffer length */
 236         unsigned int sg_count;  /* Number of SG elements */
 237         u8 fast_sgs;            /* number of fast sgls */
 238         u8 slow_sgs;            /* number of slow sgls */
 239         u8 cached_sgs;          /* number of cached sgls */
 240         int result;             /* Result passed back to mid-layer */
 241         unsigned long jiffies;  /* Time stamp when I/O logged */
 242         int refcount;           /* Reference count for task id */
 243         unsigned int blk_req_cpu; /* CPU that the task is queued on by
 244                                    * blk layer
 245                                    */
 246         unsigned int req_cpu;   /* CPU that the task is queued on */
 247         unsigned int intr_cpu;  /* Interrupt CPU that the task is received on */
 248         unsigned int blk_rsp_cpu;/* CPU that task is actually processed and
 249                                   * returned to blk layer
 250                                   */
 251         bool cached_sge;
 252         bool slow_sge;
 253         bool fast_sge;
 254 };
 255
 256 /* Number of entries in BDQ */
 257 #define QEDI_BDQ_NUM            256
 258 #define QEDI_BDQ_BUF_SIZE       256
 259
 260 /* DMA coherent buffers for BDQ */
 261 struct qedi_bdq_buf {
 262         void *buf_addr;
 263         dma_addr_t buf_dma;
 264 };
 265
 266 /* Main port level struct */
 267 struct qedi_ctx {
 268         struct qedi_dbg_ctx dbg_ctx;
 269         struct Scsi_Host *shost;
 270         struct pci_dev *pdev;
 271         struct qed_dev *cdev;
 272         struct qed_dev_iscsi_info dev_info;
 273         struct qed_int_info int_info;
 274         struct qedi_glbl_q_params *p_cpuq;
 275         struct global_queue **global_queues;
 276         /* uio declaration */
 277         struct qedi_uio_dev *udev;
 278         struct list_head ll2_skb_list;
 279         spinlock_t ll2_lock;    /* Light L2 lock */
 280         spinlock_t hba_lock;    /* per port lock */
 281         struct task_struct *ll2_recv_thread;
 282         unsigned long flags;
 283 #define UIO_DEV_OPENED          1
 284 #define QEDI_IOTHREAD_WAKE      2
 285 #define QEDI_IN_RECOVERY        5
 286 #define QEDI_IN_OFFLINE         6
 287
 288         u8 mac[ETH_ALEN];
 289         u32 src_ip[4];
 290         u8 ip_type;
 291
 292         /* Physical address of above array */
 293         dma_addr_t hw_p_cpuq;
 294
 295         struct qedi_bdq_buf bdq[QEDI_BDQ_NUM];
 296         void *bdq_pbl;
 297         dma_addr_t bdq_pbl_dma;
 298         size_t bdq_pbl_mem_size;
 299         void *bdq_pbl_list;
 300         dma_addr_t bdq_pbl_list_dma;
 301         u8 bdq_pbl_list_num_entries;
 302         struct qedi_nvm_iscsi_image *iscsi_image;
 303         dma_addr_t nvm_buf_dma;
 304         void __iomem *bdq_primary_prod;
 305         void __iomem *bdq_secondary_prod;
 306         u16 bdq_prod_idx;
 307         u16 rq_num_entries;
 308
 309         u32 max_sqes;
 310         u8 num_queues;
 311         u32 max_active_conns;
 312
 313         struct iscsi_cid_queue cid_que;
 314         struct qedi_endpoint **ep_tbl;
 315         struct qedi_portid_tbl lcl_port_tbl;
 316
 317         /* Rx fast path intr context */
 318         struct qed_sb_info      *sb_array;
 319         struct qedi_fastpath    *fp_array;
 320         struct qed_iscsi_tid    tasks;
 321
 322 #define QEDI_LINK_DOWN          0
 323 #define QEDI_LINK_UP            1
 324         atomic_t link_state;
 325
 326 #define QEDI_RESERVE_TASK_ID    0
 327 #define MAX_ISCSI_TASK_ENTRIES  4096
 328 #define QEDI_INVALID_TASK_ID    (MAX_ISCSI_TASK_ENTRIES + 1)
 329         unsigned long task_idx_map[MAX_ISCSI_TASK_ENTRIES / BITS_PER_LONG];
 330         struct qedi_itt_map *itt_map;
 331         u16 tid_reuse_count[QEDI_MAX_ISCSI_TASK];
 332         struct qed_pf_params pf_params;
 333
 334         struct workqueue_struct *tmf_thread;
 335         struct workqueue_struct *offload_thread;
 336
 337         u16 ll2_mtu;
 338
 339         struct workqueue_struct *dpc_wq;
 340
 341         spinlock_t task_idx_lock;       /* To protect gbl context */
 342         s32 last_tidx_alloc;
 343         s32 last_tidx_clear;
 344
 345         struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE];
 346         spinlock_t io_trace_lock;       /* prtect trace Log buf */
 347         u16 io_trace_idx;
 348         unsigned int intr_cpu;
 349         u32 cached_sgls;
 350         bool use_cached_sge;
 351         u32 slow_sgls;
 352         bool use_slow_sge;
 353         u32 fast_sgls;
 354         bool use_fast_sge;
 355
 356         atomic_t num_offloads;
 357 #define SYSFS_FLAG_FW_SEL_BOOT 2
 358 #define IPV6_LEN        41
 359 #define IPV4_LEN        17
 360         struct iscsi_boot_kset *boot_kset;
 361
 362         /* Used for iscsi statistics */
 363         struct mutex stats_lock;
 364 };
 365
 366 struct qedi_work {
 367         struct list_head list;
 368         struct qedi_ctx *qedi;
 369         union iscsi_cqe cqe;
 370         u16     que_idx;
 371         bool is_solicited;
 372 };
 373
 374 struct qedi_percpu_s {
 375         struct task_struct *iothread;
 376         struct list_head work_list;
 377         spinlock_t p_work_lock;         /* Per cpu worker lock */
 378 };
 379
 380 static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid)
 381 {
 382         return (info->blocks[tid / info->num_tids_per_block] +
 383                 (tid % info->num_tids_per_block) * info->size);
 384 }
 385
 386 #define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32))
 387 #define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))
 388
 389 #endif /* _QEDI_H_ */