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_ALIGN(addr) ALIGN(addr, QEDI_PAGE_SIZE) 68 #define QEDI_PAGE_MASK (~((QEDI_PAGE_SIZE) - 1)) 69 70 #define QEDI_HW_DMA_BOUNDARY 0xfff 71 #define QEDI_PATH_HANDLE 0xFE0000000UL 72 73 enum qedi_nvm_tgts { 74 QEDI_NVM_TGT_PRI, 75 QEDI_NVM_TGT_SEC, 76 }; 77 78 struct qedi_nvm_iscsi_image { 79 struct nvm_iscsi_cfg iscsi_cfg; 80 u32 crc; 81 }; 82 83 struct qedi_uio_ctrl { 84 /* meta data */ 85 u32 uio_hsi_version; 86 87 /* user writes */ 88 u32 host_tx_prod; 89 u32 host_rx_cons; 90 u32 host_rx_bd_cons; 91 u32 host_tx_pkt_len; 92 u32 host_rx_cons_cnt; 93 94 /* driver writes */ 95 u32 hw_tx_cons; 96 u32 hw_rx_prod; 97 u32 hw_rx_bd_prod; 98 u32 hw_rx_prod_cnt; 99 100 /* other */ 101 u8 mac_addr[6]; 102 u8 reserve[2]; 103 }; 104 105 struct qedi_rx_bd { 106 u32 rx_pkt_index; 107 u32 rx_pkt_len; 108 u16 vlan_id; 109 }; 110 111 #define QEDI_RX_DESC_CNT (QEDI_PAGE_SIZE / sizeof(struct qedi_rx_bd)) 112 #define QEDI_MAX_RX_DESC_CNT (QEDI_RX_DESC_CNT - 1) 113 #define QEDI_NUM_RX_BD (QEDI_RX_DESC_CNT * 1) 114 #define QEDI_MAX_RX_BD (QEDI_NUM_RX_BD - 1) 115 116 #define QEDI_NEXT_RX_IDX(x) ((((x) & (QEDI_MAX_RX_DESC_CNT)) == \ 117 (QEDI_MAX_RX_DESC_CNT - 1)) ? \ 118 (x) + 2 : (x) + 1) 119 120 struct qedi_uio_dev { 121 struct uio_info qedi_uinfo; 122 u32 uio_dev; 123 struct list_head list; 124 125 u32 ll2_ring_size; 126 void *ll2_ring; 127 128 u32 ll2_buf_size; 129 void *ll2_buf; 130 131 void *rx_pkt; 132 void *tx_pkt; 133 134 struct qedi_ctx *qedi; 135 struct pci_dev *pdev; 136 void *uctrl; 137 }; 138 139 /* List to maintain the skb pointers */ 140 struct skb_work_list { 141 struct list_head list; 142 struct sk_buff *skb; 143 u16 vlan_id; 144 }; 145 146 /* Queue sizes in number of elements */ 147 #define QEDI_SQ_SIZE MAX_OUSTANDING_TASKS_PER_CON 148 #define QEDI_CQ_SIZE 2048 149 #define QEDI_CMDQ_SIZE QEDI_MAX_ISCSI_TASK 150 #define QEDI_PROTO_CQ_PROD_IDX 0 151 152 struct qedi_glbl_q_params { 153 u64 hw_p_cq; /* Completion queue PBL */ 154 u64 hw_p_rq; /* Request queue PBL */ 155 u64 hw_p_cmdq; /* Command queue PBL */ 156 }; 157 158 struct global_queue { 159 union iscsi_cqe *cq; 160 dma_addr_t cq_dma; 161 u32 cq_mem_size; 162 u32 cq_cons_idx; /* Completion queue consumer index */ 163 164 void *cq_pbl; 165 dma_addr_t cq_pbl_dma; 166 u32 cq_pbl_size; 167 168 }; 169 170 struct qedi_fastpath { 171 struct qed_sb_info *sb_info; 172 u16 sb_id; 173 #define QEDI_NAME_SIZE 16 174 char name[QEDI_NAME_SIZE]; 175 struct qedi_ctx *qedi; 176 }; 177 178 /* Used to pass fastpath information needed to process CQEs */ 179 struct qedi_io_work { 180 struct list_head list; 181 struct iscsi_cqe_solicited cqe; 182 u16 que_idx; 183 }; 184 185 /** 186 * struct iscsi_cid_queue - Per adapter iscsi cid queue 187 * 188 * @cid_que_base: queue base memory 189 * @cid_que: queue memory pointer 190 * @cid_q_prod_idx: produce index 191 * @cid_q_cons_idx: consumer index 192 * @cid_q_max_idx: max index. used to detect wrap around condition 193 * @cid_free_cnt: queue size 194 * @conn_cid_tbl: iscsi cid to conn structure mapping table 195 * 196 * Per adapter iSCSI CID Queue 197 */ 198 struct iscsi_cid_queue { 199 void *cid_que_base; 200 u32 *cid_que; 201 u32 cid_q_prod_idx; 202 u32 cid_q_cons_idx; 203 u32 cid_q_max_idx; 204 u32 cid_free_cnt; 205 struct qedi_conn **conn_cid_tbl; 206 }; 207 208 struct qedi_portid_tbl { 209 spinlock_t lock; /* Port id lock */ 210 u16 start; 211 u16 max; 212 u16 next; 213 unsigned long *table; 214 }; 215 216 struct qedi_itt_map { 217 __le32 itt; 218 struct qedi_cmd *p_cmd; 219 }; 220 221 /* I/O tracing entry */ 222 #define QEDI_IO_TRACE_SIZE 2048 223 struct qedi_io_log { 224 #define QEDI_IO_TRACE_REQ 0 225 #define QEDI_IO_TRACE_RSP 1 226 u8 direction; 227 u16 task_id; 228 u32 cid; 229 u32 port_id; /* Remote port fabric ID */ 230 int lun; 231 u8 op; /* SCSI CDB */ 232 u8 lba[4]; 233 unsigned int bufflen; /* SCSI buffer length */ 234 unsigned int sg_count; /* Number of SG elements */ 235 u8 fast_sgs; /* number of fast sgls */ 236 u8 slow_sgs; /* number of slow sgls */ 237 u8 cached_sgs; /* number of cached sgls */ 238 int result; /* Result passed back to mid-layer */ 239 unsigned long jiffies; /* Time stamp when I/O logged */ 240 int refcount; /* Reference count for task id */ 241 unsigned int blk_req_cpu; /* CPU that the task is queued on by 242 * blk layer 243 */ 244 unsigned int req_cpu; /* CPU that the task is queued on */ 245 unsigned int intr_cpu; /* Interrupt CPU that the task is received on */ 246 unsigned int blk_rsp_cpu;/* CPU that task is actually processed and 247 * returned to blk layer 248 */ 249 bool cached_sge; 250 bool slow_sge; 251 bool fast_sge; 252 }; 253 254 /* Number of entries in BDQ */ 255 #define QEDI_BDQ_NUM 256 256 #define QEDI_BDQ_BUF_SIZE 256 257 258 /* DMA coherent buffers for BDQ */ 259 struct qedi_bdq_buf { 260 void *buf_addr; 261 dma_addr_t buf_dma; 262 }; 263 264 /* Main port level struct */ 265 struct qedi_ctx { 266 struct qedi_dbg_ctx dbg_ctx; 267 struct Scsi_Host *shost; 268 struct pci_dev *pdev; 269 struct qed_dev *cdev; 270 struct qed_dev_iscsi_info dev_info; 271 struct qed_int_info int_info; 272 struct qedi_glbl_q_params *p_cpuq; 273 struct global_queue **global_queues; 274 /* uio declaration */ 275 struct qedi_uio_dev *udev; 276 struct list_head ll2_skb_list; 277 spinlock_t ll2_lock; /* Light L2 lock */ 278 spinlock_t hba_lock; /* per port lock */ 279 struct task_struct *ll2_recv_thread; 280 unsigned long flags; 281 #define UIO_DEV_OPENED 1 282 #define QEDI_IOTHREAD_WAKE 2 283 #define QEDI_IN_RECOVERY 5 284 #define QEDI_IN_OFFLINE 6 285 286 u8 mac[ETH_ALEN]; 287 u32 src_ip[4]; 288 u8 ip_type; 289 290 /* Physical address of above array */ 291 dma_addr_t hw_p_cpuq; 292 293 struct qedi_bdq_buf bdq[QEDI_BDQ_NUM]; 294 void *bdq_pbl; 295 dma_addr_t bdq_pbl_dma; 296 size_t bdq_pbl_mem_size; 297 void *bdq_pbl_list; 298 dma_addr_t bdq_pbl_list_dma; 299 u8 bdq_pbl_list_num_entries; 300 struct qedi_nvm_iscsi_image *iscsi_image; 301 dma_addr_t nvm_buf_dma; 302 void __iomem *bdq_primary_prod; 303 void __iomem *bdq_secondary_prod; 304 u16 bdq_prod_idx; 305 u16 rq_num_entries; 306 307 u32 max_sqes; 308 u8 num_queues; 309 u32 max_active_conns; 310 311 struct iscsi_cid_queue cid_que; 312 struct qedi_endpoint **ep_tbl; 313 struct qedi_portid_tbl lcl_port_tbl; 314 315 /* Rx fast path intr context */ 316 struct qed_sb_info *sb_array; 317 struct qedi_fastpath *fp_array; 318 struct qed_iscsi_tid tasks; 319 320 #define QEDI_LINK_DOWN 0 321 #define QEDI_LINK_UP 1 322 atomic_t link_state; 323 324 #define QEDI_RESERVE_TASK_ID 0 325 #define MAX_ISCSI_TASK_ENTRIES 4096 326 #define QEDI_INVALID_TASK_ID (MAX_ISCSI_TASK_ENTRIES + 1) 327 unsigned long task_idx_map[MAX_ISCSI_TASK_ENTRIES / BITS_PER_LONG]; 328 struct qedi_itt_map *itt_map; 329 u16 tid_reuse_count[QEDI_MAX_ISCSI_TASK]; 330 struct qed_pf_params pf_params; 331 332 struct workqueue_struct *tmf_thread; 333 struct workqueue_struct *offload_thread; 334 335 u16 ll2_mtu; 336 337 struct workqueue_struct *dpc_wq; 338 339 spinlock_t task_idx_lock; /* To protect gbl context */ 340 s32 last_tidx_alloc; 341 s32 last_tidx_clear; 342 343 struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE]; 344 spinlock_t io_trace_lock; /* prtect trace Log buf */ 345 u16 io_trace_idx; 346 unsigned int intr_cpu; 347 u32 cached_sgls; 348 bool use_cached_sge; 349 u32 slow_sgls; 350 bool use_slow_sge; 351 u32 fast_sgls; 352 bool use_fast_sge; 353 354 atomic_t num_offloads; 355 #define SYSFS_FLAG_FW_SEL_BOOT 2 356 #define IPV6_LEN 41 357 #define IPV4_LEN 17 358 struct iscsi_boot_kset *boot_kset; 359 360 /* Used for iscsi statistics */ 361 struct mutex stats_lock; 362 }; 363 364 struct qedi_work { 365 struct list_head list; 366 struct qedi_ctx *qedi; 367 union iscsi_cqe cqe; 368 u16 que_idx; 369 bool is_solicited; 370 }; 371 372 struct qedi_percpu_s { 373 struct task_struct *iothread; 374 struct list_head work_list; 375 spinlock_t p_work_lock; /* Per cpu worker lock */ 376 }; 377 378 static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid) 379 { 380 return (info->blocks[tid / info->num_tids_per_block] + 381 (tid % info->num_tids_per_block) * info->size); 382 } 383 384 #define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32)) 385 #define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff)) 386 387 #endif /* _QEDI_H_ */ 388