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 27 #define QEDI_MODULE_NAME "qedi" 28 29 struct qedi_endpoint; 30 31 /* 32 * PCI function probe defines 33 */ 34 #define QEDI_MODE_NORMAL 0 35 #define QEDI_MODE_RECOVERY 1 36 37 #define ISCSI_WQE_SET_PTU_INVALIDATE 1 38 #define QEDI_MAX_ISCSI_TASK 4096 39 #define QEDI_MAX_TASK_NUM 0x0FFF 40 #define QEDI_MAX_ISCSI_CONNS_PER_HBA 1024 41 #define QEDI_ISCSI_MAX_BDS_PER_CMD 256 /* Firmware max BDs is 256 */ 42 #define MAX_OUSTANDING_TASKS_PER_CON 1024 43 44 #define QEDI_MAX_BD_LEN 0xffff 45 #define QEDI_BD_SPLIT_SZ 0x1000 46 #define QEDI_PAGE_SIZE 4096 47 #define QEDI_FAST_SGE_COUNT 4 48 /* MAX Length for cached SGL */ 49 #define MAX_SGLEN_FOR_CACHESGL ((1U << 16) - 1) 50 51 #define MAX_NUM_MSIX_PF 8 52 #define MIN_NUM_CPUS_MSIX(x) min((x)->msix_count, num_online_cpus()) 53 54 #define QEDI_LOCAL_PORT_MIN 60000 55 #define QEDI_LOCAL_PORT_MAX 61024 56 #define QEDI_LOCAL_PORT_RANGE (QEDI_LOCAL_PORT_MAX - QEDI_LOCAL_PORT_MIN) 57 #define QEDI_LOCAL_PORT_INVALID 0xffff 58 #define TX_RX_RING 16 59 #define RX_RING (TX_RX_RING - 1) 60 #define LL2_SINGLE_BUF_SIZE 0x400 61 #define QEDI_PAGE_SIZE 4096 62 #define QEDI_PAGE_ALIGN(addr) ALIGN(addr, QEDI_PAGE_SIZE) 63 #define QEDI_PAGE_MASK (~((QEDI_PAGE_SIZE) - 1)) 64 65 #define QEDI_PAGE_SIZE 4096 66 #define QEDI_PATH_HANDLE 0xFE0000000UL 67 68 struct qedi_uio_ctrl { 69 /* meta data */ 70 u32 uio_hsi_version; 71 72 /* user writes */ 73 u32 host_tx_prod; 74 u32 host_rx_cons; 75 u32 host_rx_bd_cons; 76 u32 host_tx_pkt_len; 77 u32 host_rx_cons_cnt; 78 79 /* driver writes */ 80 u32 hw_tx_cons; 81 u32 hw_rx_prod; 82 u32 hw_rx_bd_prod; 83 u32 hw_rx_prod_cnt; 84 85 /* other */ 86 u8 mac_addr[6]; 87 u8 reserve[2]; 88 }; 89 90 struct qedi_rx_bd { 91 u32 rx_pkt_index; 92 u32 rx_pkt_len; 93 u16 vlan_id; 94 }; 95 96 #define QEDI_RX_DESC_CNT (QEDI_PAGE_SIZE / sizeof(struct qedi_rx_bd)) 97 #define QEDI_MAX_RX_DESC_CNT (QEDI_RX_DESC_CNT - 1) 98 #define QEDI_NUM_RX_BD (QEDI_RX_DESC_CNT * 1) 99 #define QEDI_MAX_RX_BD (QEDI_NUM_RX_BD - 1) 100 101 #define QEDI_NEXT_RX_IDX(x) ((((x) & (QEDI_MAX_RX_DESC_CNT)) == \ 102 (QEDI_MAX_RX_DESC_CNT - 1)) ? \ 103 (x) + 2 : (x) + 1) 104 105 struct qedi_uio_dev { 106 struct uio_info qedi_uinfo; 107 u32 uio_dev; 108 struct list_head list; 109 110 u32 ll2_ring_size; 111 void *ll2_ring; 112 113 u32 ll2_buf_size; 114 void *ll2_buf; 115 116 void *rx_pkt; 117 void *tx_pkt; 118 119 struct qedi_ctx *qedi; 120 struct pci_dev *pdev; 121 void *uctrl; 122 }; 123 124 /* List to maintain the skb pointers */ 125 struct skb_work_list { 126 struct list_head list; 127 struct sk_buff *skb; 128 u16 vlan_id; 129 }; 130 131 /* Queue sizes in number of elements */ 132 #define QEDI_SQ_SIZE MAX_OUSTANDING_TASKS_PER_CON 133 #define QEDI_CQ_SIZE 2048 134 #define QEDI_CMDQ_SIZE QEDI_MAX_ISCSI_TASK 135 #define QEDI_PROTO_CQ_PROD_IDX 0 136 137 struct qedi_glbl_q_params { 138 u64 hw_p_cq; /* Completion queue PBL */ 139 u64 hw_p_rq; /* Request queue PBL */ 140 u64 hw_p_cmdq; /* Command queue PBL */ 141 }; 142 143 struct global_queue { 144 union iscsi_cqe *cq; 145 dma_addr_t cq_dma; 146 u32 cq_mem_size; 147 u32 cq_cons_idx; /* Completion queue consumer index */ 148 149 void *cq_pbl; 150 dma_addr_t cq_pbl_dma; 151 u32 cq_pbl_size; 152 153 }; 154 155 struct qedi_fastpath { 156 struct qed_sb_info *sb_info; 157 u16 sb_id; 158 #define QEDI_NAME_SIZE 16 159 char name[QEDI_NAME_SIZE]; 160 struct qedi_ctx *qedi; 161 }; 162 163 /* Used to pass fastpath information needed to process CQEs */ 164 struct qedi_io_work { 165 struct list_head list; 166 struct iscsi_cqe_solicited cqe; 167 u16 que_idx; 168 }; 169 170 /** 171 * struct iscsi_cid_queue - Per adapter iscsi cid queue 172 * 173 * @cid_que_base: queue base memory 174 * @cid_que: queue memory pointer 175 * @cid_q_prod_idx: produce index 176 * @cid_q_cons_idx: consumer index 177 * @cid_q_max_idx: max index. used to detect wrap around condition 178 * @cid_free_cnt: queue size 179 * @conn_cid_tbl: iscsi cid to conn structure mapping table 180 * 181 * Per adapter iSCSI CID Queue 182 */ 183 struct iscsi_cid_queue { 184 void *cid_que_base; 185 u32 *cid_que; 186 u32 cid_q_prod_idx; 187 u32 cid_q_cons_idx; 188 u32 cid_q_max_idx; 189 u32 cid_free_cnt; 190 struct qedi_conn **conn_cid_tbl; 191 }; 192 193 struct qedi_portid_tbl { 194 spinlock_t lock; /* Port id lock */ 195 u16 start; 196 u16 max; 197 u16 next; 198 unsigned long *table; 199 }; 200 201 struct qedi_itt_map { 202 __le32 itt; 203 struct qedi_cmd *p_cmd; 204 }; 205 206 /* I/O tracing entry */ 207 #define QEDI_IO_TRACE_SIZE 2048 208 struct qedi_io_log { 209 #define QEDI_IO_TRACE_REQ 0 210 #define QEDI_IO_TRACE_RSP 1 211 u8 direction; 212 u16 task_id; 213 u32 cid; 214 u32 port_id; /* Remote port fabric ID */ 215 int lun; 216 u8 op; /* SCSI CDB */ 217 u8 lba[4]; 218 unsigned int bufflen; /* SCSI buffer length */ 219 unsigned int sg_count; /* Number of SG elements */ 220 u8 fast_sgs; /* number of fast sgls */ 221 u8 slow_sgs; /* number of slow sgls */ 222 u8 cached_sgs; /* number of cached sgls */ 223 int result; /* Result passed back to mid-layer */ 224 unsigned long jiffies; /* Time stamp when I/O logged */ 225 int refcount; /* Reference count for task id */ 226 unsigned int blk_req_cpu; /* CPU that the task is queued on by 227 * blk layer 228 */ 229 unsigned int req_cpu; /* CPU that the task is queued on */ 230 unsigned int intr_cpu; /* Interrupt CPU that the task is received on */ 231 unsigned int blk_rsp_cpu;/* CPU that task is actually processed and 232 * returned to blk layer 233 */ 234 bool cached_sge; 235 bool slow_sge; 236 bool fast_sge; 237 }; 238 239 /* Number of entries in BDQ */ 240 #define QEDI_BDQ_NUM 256 241 #define QEDI_BDQ_BUF_SIZE 256 242 243 /* DMA coherent buffers for BDQ */ 244 struct qedi_bdq_buf { 245 void *buf_addr; 246 dma_addr_t buf_dma; 247 }; 248 249 /* Main port level struct */ 250 struct qedi_ctx { 251 struct qedi_dbg_ctx dbg_ctx; 252 struct Scsi_Host *shost; 253 struct pci_dev *pdev; 254 struct qed_dev *cdev; 255 struct qed_dev_iscsi_info dev_info; 256 struct qed_int_info int_info; 257 struct qedi_glbl_q_params *p_cpuq; 258 struct global_queue **global_queues; 259 /* uio declaration */ 260 struct qedi_uio_dev *udev; 261 struct list_head ll2_skb_list; 262 spinlock_t ll2_lock; /* Light L2 lock */ 263 spinlock_t hba_lock; /* per port lock */ 264 struct task_struct *ll2_recv_thread; 265 unsigned long flags; 266 #define UIO_DEV_OPENED 1 267 #define QEDI_IOTHREAD_WAKE 2 268 #define QEDI_IN_RECOVERY 5 269 #define QEDI_IN_OFFLINE 6 270 271 u8 mac[ETH_ALEN]; 272 u32 src_ip[4]; 273 u8 ip_type; 274 275 /* Physical address of above array */ 276 dma_addr_t hw_p_cpuq; 277 278 struct qedi_bdq_buf bdq[QEDI_BDQ_NUM]; 279 void *bdq_pbl; 280 dma_addr_t bdq_pbl_dma; 281 size_t bdq_pbl_mem_size; 282 void *bdq_pbl_list; 283 dma_addr_t bdq_pbl_list_dma; 284 u8 bdq_pbl_list_num_entries; 285 void __iomem *bdq_primary_prod; 286 void __iomem *bdq_secondary_prod; 287 u16 bdq_prod_idx; 288 u16 rq_num_entries; 289 290 u32 msix_count; 291 u32 max_sqes; 292 u8 num_queues; 293 u32 max_active_conns; 294 295 struct iscsi_cid_queue cid_que; 296 struct qedi_endpoint **ep_tbl; 297 struct qedi_portid_tbl lcl_port_tbl; 298 299 /* Rx fast path intr context */ 300 struct qed_sb_info *sb_array; 301 struct qedi_fastpath *fp_array; 302 struct qed_iscsi_tid tasks; 303 304 #define QEDI_LINK_DOWN 0 305 #define QEDI_LINK_UP 1 306 atomic_t link_state; 307 308 #define QEDI_RESERVE_TASK_ID 0 309 #define MAX_ISCSI_TASK_ENTRIES 4096 310 #define QEDI_INVALID_TASK_ID (MAX_ISCSI_TASK_ENTRIES + 1) 311 unsigned long task_idx_map[MAX_ISCSI_TASK_ENTRIES / BITS_PER_LONG]; 312 struct qedi_itt_map *itt_map; 313 u16 tid_reuse_count[QEDI_MAX_ISCSI_TASK]; 314 struct qed_pf_params pf_params; 315 316 struct workqueue_struct *tmf_thread; 317 struct workqueue_struct *offload_thread; 318 319 u16 ll2_mtu; 320 321 struct workqueue_struct *dpc_wq; 322 323 spinlock_t task_idx_lock; /* To protect gbl context */ 324 s32 last_tidx_alloc; 325 s32 last_tidx_clear; 326 327 struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE]; 328 spinlock_t io_trace_lock; /* prtect trace Log buf */ 329 u16 io_trace_idx; 330 unsigned int intr_cpu; 331 u32 cached_sgls; 332 bool use_cached_sge; 333 u32 slow_sgls; 334 bool use_slow_sge; 335 u32 fast_sgls; 336 bool use_fast_sge; 337 338 atomic_t num_offloads; 339 }; 340 341 struct qedi_work { 342 struct list_head list; 343 struct qedi_ctx *qedi; 344 union iscsi_cqe cqe; 345 u16 que_idx; 346 bool is_solicited; 347 }; 348 349 struct qedi_percpu_s { 350 struct task_struct *iothread; 351 struct list_head work_list; 352 spinlock_t p_work_lock; /* Per cpu worker lock */ 353 }; 354 355 static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid) 356 { 357 return (info->blocks[tid / info->num_tids_per_block] + 358 (tid % info->num_tids_per_block) * info->size); 359 } 360 361 #define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32)) 362 #define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff)) 363 364 #endif /* _QEDI_H_ */ 365