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"
26 #include "qedi_nvm_iscsi_cfg.h"
28 #define QEDI_MODULE_NAME "qedi"
33 #define GET_FIELD2(value, name) \
34 (((value) & (name ## _MASK)) >> (name ## _OFFSET))
38 * PCI function probe defines
40 #define QEDI_MODE_NORMAL 0
41 #define QEDI_MODE_RECOVERY 1
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
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)
57 #define MAX_NUM_MSIX_PF 8
58 #define MIN_NUM_CPUS_MSIX(x) min((x)->msix_count, num_online_cpus())
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
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))
71 #define QEDI_PAGE_SIZE 4096
72 #define QEDI_HW_DMA_BOUNDARY 0xfff
73 #define QEDI_PATH_HANDLE 0xFE0000000UL
80 struct qedi_uio_ctrl {
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)
113 #define QEDI_NEXT_RX_IDX(x) ((((x) & (QEDI_MAX_RX_DESC_CNT)) == \
114 (QEDI_MAX_RX_DESC_CNT - 1)) ? \
117 struct qedi_uio_dev {
118 struct uio_info qedi_uinfo;
120 struct list_head list;
131 struct qedi_ctx *qedi;
132 struct pci_dev *pdev;
136 /* List to maintain the skb pointers */
137 struct skb_work_list {
138 struct list_head list;
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
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 */
155 struct global_queue {
159 u32 cq_cons_idx; /* Completion queue consumer index */
162 dma_addr_t cq_pbl_dma;
167 struct qedi_fastpath {
168 struct qed_sb_info *sb_info;
170 #define QEDI_NAME_SIZE 16
171 char name[QEDI_NAME_SIZE];
172 struct qedi_ctx *qedi;
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;
183 * struct iscsi_cid_queue - Per adapter iscsi cid queue
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
193 * Per adapter iSCSI CID Queue
195 struct iscsi_cid_queue {
202 struct qedi_conn **conn_cid_tbl;
205 struct qedi_portid_tbl {
206 spinlock_t lock; /* Port id lock */
210 unsigned long *table;
213 struct qedi_itt_map {
215 struct qedi_cmd *p_cmd;
218 /* I/O tracing entry */
219 #define QEDI_IO_TRACE_SIZE 2048
221 #define QEDI_IO_TRACE_REQ 0
222 #define QEDI_IO_TRACE_RSP 1
226 u32 port_id; /* Remote port fabric ID */
228 u8 op; /* SCSI CDB */
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
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
251 /* Number of entries in BDQ */
252 #define QEDI_BDQ_NUM 256
253 #define QEDI_BDQ_BUF_SIZE 256
255 /* DMA coherent buffers for BDQ */
256 struct qedi_bdq_buf {
261 /* Main port level struct */
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;
278 #define UIO_DEV_OPENED 1
279 #define QEDI_IOTHREAD_WAKE 2
280 #define QEDI_IN_RECOVERY 5
281 #define QEDI_IN_OFFLINE 6
287 /* Physical address of above array */
288 dma_addr_t hw_p_cpuq;
290 struct qedi_bdq_buf bdq[QEDI_BDQ_NUM];
292 dma_addr_t bdq_pbl_dma;
293 size_t bdq_pbl_mem_size;
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;
307 u32 max_active_conns;
309 struct iscsi_cid_queue cid_que;
310 struct qedi_endpoint **ep_tbl;
311 struct qedi_portid_tbl lcl_port_tbl;
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;
318 #define QEDI_LINK_DOWN 0
319 #define QEDI_LINK_UP 1
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;
330 struct workqueue_struct *tmf_thread;
331 struct workqueue_struct *offload_thread;
335 struct workqueue_struct *dpc_wq;
337 spinlock_t task_idx_lock; /* To protect gbl context */
341 struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE];
342 spinlock_t io_trace_lock; /* prtect trace Log buf */
344 unsigned int intr_cpu;
352 atomic_t num_offloads;
353 #define SYSFS_FLAG_FW_SEL_BOOT 2
356 struct iscsi_boot_kset *boot_kset;
360 struct list_head list;
361 struct qedi_ctx *qedi;
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 */
373 static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid)
375 return (info->blocks[tid / info->num_tids_per_block] +
376 (tid % info->num_tids_per_block) * info->size);
379 #define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32))
380 #define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))
382 #endif /* _QEDI_H_ */