2 * QLogic iSCSI Offload Driver
3 * Copyright (c) 2016 Cavium Inc.
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
13 #define __PREVENT_QED_HSI__
15 #include <scsi/scsi_transport_iscsi.h>
16 #include <scsi/libiscsi.h>
17 #include <scsi/scsi_host.h>
18 #include <linux/uio_driver.h>
21 #include <linux/qed/qed_if.h>
23 #include <linux/qed/qed_iscsi_if.h>
24 #include <linux/qed/qed_ll2_if.h>
25 #include "qedi_version.h"
27 #define QEDI_MODULE_NAME "qedi"
32 * PCI function probe defines
34 #define QEDI_MODE_NORMAL 0
35 #define QEDI_MODE_RECOVERY 1
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
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)
51 #define MAX_NUM_MSIX_PF 8
52 #define MIN_NUM_CPUS_MSIX(x) min((x)->msix_count, num_online_cpus())
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
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))
65 #define QEDI_PAGE_SIZE 4096
66 #define QEDI_PATH_HANDLE 0xFE0000000UL
68 struct qedi_uio_ctrl {
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)
101 #define QEDI_NEXT_RX_IDX(x) ((((x) & (QEDI_MAX_RX_DESC_CNT)) == \
102 (QEDI_MAX_RX_DESC_CNT - 1)) ? \
105 struct qedi_uio_dev {
106 struct uio_info qedi_uinfo;
108 struct list_head list;
119 struct qedi_ctx *qedi;
120 struct pci_dev *pdev;
124 /* List to maintain the skb pointers */
125 struct skb_work_list {
126 struct list_head list;
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
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 */
143 struct global_queue {
147 u32 cq_cons_idx; /* Completion queue consumer index */
150 dma_addr_t cq_pbl_dma;
155 struct qedi_fastpath {
156 struct qed_sb_info *sb_info;
158 #define QEDI_NAME_SIZE 16
159 char name[QEDI_NAME_SIZE];
160 struct qedi_ctx *qedi;
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;
171 * struct iscsi_cid_queue - Per adapter iscsi cid queue
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
181 * Per adapter iSCSI CID Queue
183 struct iscsi_cid_queue {
190 struct qedi_conn **conn_cid_tbl;
193 struct qedi_portid_tbl {
194 spinlock_t lock; /* Port id lock */
198 unsigned long *table;
201 struct qedi_itt_map {
203 struct qedi_cmd *p_cmd;
206 /* I/O tracing entry */
207 #define QEDI_IO_TRACE_SIZE 2048
209 #define QEDI_IO_TRACE_REQ 0
210 #define QEDI_IO_TRACE_RSP 1
214 u32 port_id; /* Remote port fabric ID */
216 u8 op; /* SCSI CDB */
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
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
239 /* Number of entries in BDQ */
240 #define QEDI_BDQ_NUM 256
241 #define QEDI_BDQ_BUF_SIZE 256
243 /* DMA coherent buffers for BDQ */
244 struct qedi_bdq_buf {
249 /* Main port level struct */
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;
266 #define UIO_DEV_OPENED 1
267 #define QEDI_IOTHREAD_WAKE 2
268 #define QEDI_IN_RECOVERY 5
269 #define QEDI_IN_OFFLINE 6
275 /* Physical address of above array */
276 dma_addr_t hw_p_cpuq;
278 struct qedi_bdq_buf bdq[QEDI_BDQ_NUM];
280 dma_addr_t bdq_pbl_dma;
281 size_t bdq_pbl_mem_size;
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;
293 u32 max_active_conns;
295 struct iscsi_cid_queue cid_que;
296 struct qedi_endpoint **ep_tbl;
297 struct qedi_portid_tbl lcl_port_tbl;
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;
304 #define QEDI_LINK_DOWN 0
305 #define QEDI_LINK_UP 1
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;
316 struct workqueue_struct *tmf_thread;
317 struct workqueue_struct *offload_thread;
321 struct workqueue_struct *dpc_wq;
323 spinlock_t task_idx_lock; /* To protect gbl context */
327 struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE];
328 spinlock_t io_trace_lock; /* prtect trace Log buf */
330 unsigned int intr_cpu;
338 atomic_t num_offloads;
342 struct list_head list;
343 struct qedi_ctx *qedi;
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 */
355 static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid)
357 return (info->blocks[tid / info->num_tids_per_block] +
358 (tid % info->num_tids_per_block) * info->size);
361 #define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32))
362 #define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))
364 #endif /* _QEDI_H_ */