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 MAX_NUM_MSIX_PF 8 58 #define MIN_NUM_CPUS_MSIX(x) min((x)->msix_count, 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 msix_count; 305 u32 max_sqes; 306 u8 num_queues; 307 u32 max_active_conns; 308 309 struct iscsi_cid_queue cid_que; 310 struct qedi_endpoint **ep_tbl; 311 struct qedi_portid_tbl lcl_port_tbl; 312 313 /* Rx fast path intr context */ 314 struct qed_sb_info *sb_array; 315 struct qedi_fastpath *fp_array; 316 struct qed_iscsi_tid tasks; 317 318 #define QEDI_LINK_DOWN 0 319 #define QEDI_LINK_UP 1 320 atomic_t link_state; 321 322 #define QEDI_RESERVE_TASK_ID 0 323 #define MAX_ISCSI_TASK_ENTRIES 4096 324 #define QEDI_INVALID_TASK_ID (MAX_ISCSI_TASK_ENTRIES + 1) 325 unsigned long task_idx_map[MAX_ISCSI_TASK_ENTRIES / BITS_PER_LONG]; 326 struct qedi_itt_map *itt_map; 327 u16 tid_reuse_count[QEDI_MAX_ISCSI_TASK]; 328 struct qed_pf_params pf_params; 329 330 struct workqueue_struct *tmf_thread; 331 struct workqueue_struct *offload_thread; 332 333 u16 ll2_mtu; 334 335 struct workqueue_struct *dpc_wq; 336 337 spinlock_t task_idx_lock; /* To protect gbl context */ 338 s32 last_tidx_alloc; 339 s32 last_tidx_clear; 340 341 struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE]; 342 spinlock_t io_trace_lock; /* prtect trace Log buf */ 343 u16 io_trace_idx; 344 unsigned int intr_cpu; 345 u32 cached_sgls; 346 bool use_cached_sge; 347 u32 slow_sgls; 348 bool use_slow_sge; 349 u32 fast_sgls; 350 bool use_fast_sge; 351 352 atomic_t num_offloads; 353 #define SYSFS_FLAG_FW_SEL_BOOT 2 354 #define IPV6_LEN 41 355 #define IPV4_LEN 17 356 struct iscsi_boot_kset *boot_kset; 357 }; 358 359 struct qedi_work { 360 struct list_head list; 361 struct qedi_ctx *qedi; 362 union iscsi_cqe cqe; 363 u16 que_idx; 364 bool is_solicited; 365 }; 366 367 struct qedi_percpu_s { 368 struct task_struct *iothread; 369 struct list_head work_list; 370 spinlock_t p_work_lock; /* Per cpu worker lock */ 371 }; 372 373 static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid) 374 { 375 return (info->blocks[tid / info->num_tids_per_block] + 376 (tid % info->num_tids_per_block) * info->size); 377 } 378 379 #define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32)) 380 #define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff)) 381 382 #endif /* _QEDI_H_ */ 383