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authorBhanu Gollapudi <bprakash@broadcom.com>2011-02-04 15:10:34 -0500
committerJames Bottomley <James.Bottomley@suse.de>2011-02-28 19:40:27 -0500
commit853e2bd2103aaa91d1ba1c0b57ba17628d836f03 (patch)
treea8e0cae98856eac066cb9e598a5b9693c27cb2da /drivers/scsi/bnx2fc/bnx2fc.h
parentd2f809528a3534ea295b6d855c33cbbb3369d8c9 (diff)
[SCSI] bnx2fc: Broadcom FCoE offload driver
This driver is for Broadcom Netxtreme II 57712 chip. The following patch contains the driver sources for bnx2fc driver. libfc/libfcoe changes to enable bnx2fc have already gone through the fcoe tree. bnx2fc is a SCSI low level driver that interfaces with SCSI midlayer, libfc, libfcoe, cnic modules. bnx2fc driver uses services of libfc for slow path operations such as FIP and fabric discovery. The fast path IO perations are performed after offloading the session information to the underlying FCoE firmware. Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/bnx2fc/bnx2fc.h')
-rw-r--r--drivers/scsi/bnx2fc/bnx2fc.h511
1 files changed, 511 insertions, 0 deletions
diff --git a/drivers/scsi/bnx2fc/bnx2fc.h b/drivers/scsi/bnx2fc/bnx2fc.h
new file mode 100644
index 000000000000..df2fc09ba479
--- /dev/null
+++ b/drivers/scsi/bnx2fc/bnx2fc.h
@@ -0,0 +1,511 @@
1#ifndef _BNX2FC_H_
2#define _BNX2FC_H_
3/* bnx2fc.h: Broadcom NetXtreme II Linux FCoE offload driver.
4 *
5 * Copyright (c) 2008 - 2010 Broadcom Corporation
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation.
10 *
11 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
12 */
13
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/kernel.h>
17#include <linux/skbuff.h>
18#include <linux/netdevice.h>
19#include <linux/etherdevice.h>
20#include <linux/if_ether.h>
21#include <linux/if_vlan.h>
22#include <linux/kthread.h>
23#include <linux/crc32.h>
24#include <linux/cpu.h>
25#include <linux/types.h>
26#include <linux/list.h>
27#include <linux/delay.h>
28#include <linux/timer.h>
29#include <linux/errno.h>
30#include <linux/pci.h>
31#include <linux/init.h>
32#include <linux/dma-mapping.h>
33#include <linux/workqueue.h>
34#include <linux/mutex.h>
35#include <linux/spinlock.h>
36#include <linux/bitops.h>
37#include <linux/log2.h>
38#include <linux/interrupt.h>
39#include <linux/sched.h>
40#include <linux/io.h>
41
42#include <scsi/scsi.h>
43#include <scsi/scsi_host.h>
44#include <scsi/scsi_device.h>
45#include <scsi/scsi_cmnd.h>
46#include <scsi/scsi_eh.h>
47#include <scsi/scsi_tcq.h>
48#include <scsi/libfc.h>
49#include <scsi/libfcoe.h>
50#include <scsi/fc_encode.h>
51#include <scsi/scsi_transport.h>
52#include <scsi/scsi_transport_fc.h>
53#include <scsi/fc/fc_fip.h>
54#include <scsi/fc/fc_fc2.h>
55#include <scsi/fc_frame.h>
56#include <scsi/fc/fc_fcoe.h>
57#include <scsi/fc/fc_fcp.h>
58
59#include "57xx_hsi_bnx2fc.h"
60#include "bnx2fc_debug.h"
61#include "../../net/cnic_if.h"
62#include "bnx2fc_constants.h"
63
64#define BNX2FC_NAME "bnx2fc"
65#define BNX2FC_VERSION "1.0.0"
66
67#define PFX "bnx2fc: "
68
69#define BNX2X_DOORBELL_PCI_BAR 2
70
71#define BNX2FC_MAX_BD_LEN 0xffff
72#define BNX2FC_BD_SPLIT_SZ 0x8000
73#define BNX2FC_MAX_BDS_PER_CMD 256
74
75#define BNX2FC_SQ_WQES_MAX 256
76
77#define BNX2FC_SCSI_MAX_SQES ((3 * BNX2FC_SQ_WQES_MAX) / 8)
78#define BNX2FC_TM_MAX_SQES ((BNX2FC_SQ_WQES_MAX) / 2)
79#define BNX2FC_ELS_MAX_SQES (BNX2FC_TM_MAX_SQES - 1)
80
81#define BNX2FC_RQ_WQES_MAX 16
82#define BNX2FC_CQ_WQES_MAX (BNX2FC_SQ_WQES_MAX + BNX2FC_RQ_WQES_MAX)
83
84#define BNX2FC_NUM_MAX_SESS 128
85#define BNX2FC_NUM_MAX_SESS_LOG (ilog2(BNX2FC_NUM_MAX_SESS))
86
87#define BNX2FC_MAX_OUTSTANDING_CMNDS 4096
88#define BNX2FC_MIN_PAYLOAD 256
89#define BNX2FC_MAX_PAYLOAD 2048
90
91#define BNX2FC_RQ_BUF_SZ 256
92#define BNX2FC_RQ_BUF_LOG_SZ (ilog2(BNX2FC_RQ_BUF_SZ))
93
94#define BNX2FC_SQ_WQE_SIZE (sizeof(struct fcoe_sqe))
95#define BNX2FC_CQ_WQE_SIZE (sizeof(struct fcoe_cqe))
96#define BNX2FC_RQ_WQE_SIZE (BNX2FC_RQ_BUF_SZ)
97#define BNX2FC_XFERQ_WQE_SIZE (sizeof(struct fcoe_xfrqe))
98#define BNX2FC_CONFQ_WQE_SIZE (sizeof(struct fcoe_confqe))
99#define BNX2FC_5771X_DB_PAGE_SIZE 128
100
101#define BNX2FC_MAX_TASKS BNX2FC_MAX_OUTSTANDING_CMNDS
102#define BNX2FC_TASK_SIZE 128
103#define BNX2FC_TASKS_PER_PAGE (PAGE_SIZE/BNX2FC_TASK_SIZE)
104#define BNX2FC_TASK_CTX_ARR_SZ (BNX2FC_MAX_TASKS/BNX2FC_TASKS_PER_PAGE)
105
106#define BNX2FC_MAX_ROWS_IN_HASH_TBL 8
107#define BNX2FC_HASH_TBL_CHUNK_SIZE (16 * 1024)
108
109#define BNX2FC_MAX_SEQS 255
110
111#define BNX2FC_READ (1 << 1)
112#define BNX2FC_WRITE (1 << 0)
113
114#define BNX2FC_MIN_XID 0
115#define BNX2FC_MAX_XID (BNX2FC_MAX_OUTSTANDING_CMNDS - 1)
116#define FCOE_MIN_XID (BNX2FC_MAX_OUTSTANDING_CMNDS)
117#define FCOE_MAX_XID \
118 (BNX2FC_MAX_OUTSTANDING_CMNDS + (nr_cpu_ids * 256))
119#define BNX2FC_MAX_LUN 0xFFFF
120#define BNX2FC_MAX_FCP_TGT 256
121#define BNX2FC_MAX_CMD_LEN 16
122
123#define BNX2FC_TM_TIMEOUT 60 /* secs */
124#define BNX2FC_IO_TIMEOUT 20000UL /* msecs */
125
126#define BNX2FC_WAIT_CNT 120
127#define BNX2FC_FW_TIMEOUT (3 * HZ)
128
129#define PORT_MAX 2
130
131#define CMD_SCSI_STATUS(Cmnd) ((Cmnd)->SCp.Status)
132
133/* FC FCP Status */
134#define FC_GOOD 0
135
136#define BNX2FC_RNID_HBA 0x7
137
138/* bnx2fc driver uses only one instance of fcoe_percpu_s */
139extern struct fcoe_percpu_s bnx2fc_global;
140
141extern struct workqueue_struct *bnx2fc_wq;
142
143struct bnx2fc_percpu_s {
144 struct task_struct *iothread;
145 struct list_head work_list;
146 spinlock_t fp_work_lock;
147};
148
149
150struct bnx2fc_hba {
151 struct list_head link;
152 struct cnic_dev *cnic;
153 struct pci_dev *pcidev;
154 struct net_device *netdev;
155 struct net_device *phys_dev;
156 unsigned long reg_with_cnic;
157 #define BNX2FC_CNIC_REGISTERED 1
158 struct packet_type fcoe_packet_type;
159 struct packet_type fip_packet_type;
160 struct bnx2fc_cmd_mgr *cmd_mgr;
161 struct workqueue_struct *timer_work_queue;
162 struct kref kref;
163 spinlock_t hba_lock;
164 struct mutex hba_mutex;
165 unsigned long adapter_state;
166 #define ADAPTER_STATE_UP 0
167 #define ADAPTER_STATE_GOING_DOWN 1
168 #define ADAPTER_STATE_LINK_DOWN 2
169 #define ADAPTER_STATE_READY 3
170 u32 flags;
171 unsigned long init_done;
172 #define BNX2FC_FW_INIT_DONE 0
173 #define BNX2FC_CTLR_INIT_DONE 1
174 #define BNX2FC_CREATE_DONE 2
175 struct fcoe_ctlr ctlr;
176 u8 vlan_enabled;
177 int vlan_id;
178 u32 next_conn_id;
179 struct fcoe_task_ctx_entry **task_ctx;
180 dma_addr_t *task_ctx_dma;
181 struct regpair *task_ctx_bd_tbl;
182 dma_addr_t task_ctx_bd_dma;
183
184 int hash_tbl_segment_count;
185 void **hash_tbl_segments;
186 void *hash_tbl_pbl;
187 dma_addr_t hash_tbl_pbl_dma;
188 struct fcoe_t2_hash_table_entry *t2_hash_tbl;
189 dma_addr_t t2_hash_tbl_dma;
190 char *t2_hash_tbl_ptr;
191 dma_addr_t t2_hash_tbl_ptr_dma;
192
193 char *dummy_buffer;
194 dma_addr_t dummy_buf_dma;
195
196 struct fcoe_statistics_params *stats_buffer;
197 dma_addr_t stats_buf_dma;
198
199 /*
200 * PCI related info.
201 */
202 u16 pci_did;
203 u16 pci_vid;
204 u16 pci_sdid;
205 u16 pci_svid;
206 u16 pci_func;
207 u16 pci_devno;
208
209 struct task_struct *l2_thread;
210
211 /* linkdown handling */
212 wait_queue_head_t shutdown_wait;
213 int wait_for_link_down;
214
215 /*destroy handling */
216 struct timer_list destroy_timer;
217 wait_queue_head_t destroy_wait;
218
219 /* Active list of offloaded sessions */
220 struct bnx2fc_rport *tgt_ofld_list[BNX2FC_NUM_MAX_SESS];
221 int num_ofld_sess;
222
223 /* statistics */
224 struct completion stat_req_done;
225};
226
227#define bnx2fc_from_ctlr(fip) container_of(fip, struct bnx2fc_hba, ctlr)
228
229struct bnx2fc_cmd_mgr {
230 struct bnx2fc_hba *hba;
231 u16 next_idx;
232 struct list_head *free_list;
233 spinlock_t *free_list_lock;
234 struct io_bdt **io_bdt_pool;
235 struct bnx2fc_cmd **cmds;
236};
237
238struct bnx2fc_rport {
239 struct fcoe_port *port;
240 struct fc_rport *rport;
241 struct fc_rport_priv *rdata;
242 void __iomem *ctx_base;
243#define DPM_TRIGER_TYPE 0x40
244 u32 fcoe_conn_id;
245 u32 context_id;
246 u32 sid;
247
248 unsigned long flags;
249#define BNX2FC_FLAG_SESSION_READY 0x1
250#define BNX2FC_FLAG_OFFLOADED 0x2
251#define BNX2FC_FLAG_DISABLED 0x3
252#define BNX2FC_FLAG_DESTROYED 0x4
253#define BNX2FC_FLAG_OFLD_REQ_CMPL 0x5
254#define BNX2FC_FLAG_DESTROY_CMPL 0x6
255#define BNX2FC_FLAG_CTX_ALLOC_FAILURE 0x7
256#define BNX2FC_FLAG_UPLD_REQ_COMPL 0x8
257#define BNX2FC_FLAG_EXPL_LOGO 0x9
258
259 u32 max_sqes;
260 u32 max_rqes;
261 u32 max_cqes;
262
263 struct fcoe_sqe *sq;
264 dma_addr_t sq_dma;
265 u16 sq_prod_idx;
266 u8 sq_curr_toggle_bit;
267 u32 sq_mem_size;
268
269 struct fcoe_cqe *cq;
270 dma_addr_t cq_dma;
271 u32 cq_cons_idx;
272 u8 cq_curr_toggle_bit;
273 u32 cq_mem_size;
274
275 void *rq;
276 dma_addr_t rq_dma;
277 u32 rq_prod_idx;
278 u32 rq_cons_idx;
279 u32 rq_mem_size;
280
281 void *rq_pbl;
282 dma_addr_t rq_pbl_dma;
283 u32 rq_pbl_size;
284
285 struct fcoe_xfrqe *xferq;
286 dma_addr_t xferq_dma;
287 u32 xferq_mem_size;
288
289 struct fcoe_confqe *confq;
290 dma_addr_t confq_dma;
291 u32 confq_mem_size;
292
293 void *confq_pbl;
294 dma_addr_t confq_pbl_dma;
295 u32 confq_pbl_size;
296
297 struct fcoe_conn_db *conn_db;
298 dma_addr_t conn_db_dma;
299 u32 conn_db_mem_size;
300
301 struct fcoe_sqe *lcq;
302 dma_addr_t lcq_dma;
303 u32 lcq_mem_size;
304
305 void *ofld_req[4];
306 dma_addr_t ofld_req_dma[4];
307 void *enbl_req;
308 dma_addr_t enbl_req_dma;
309
310 spinlock_t tgt_lock;
311 spinlock_t cq_lock;
312 atomic_t num_active_ios;
313 u32 flush_in_prog;
314 unsigned long work_time_slice;
315 unsigned long timestamp;
316 struct list_head free_task_list;
317 struct bnx2fc_cmd *pending_queue[BNX2FC_SQ_WQES_MAX+1];
318 atomic_t pi;
319 atomic_t ci;
320 struct list_head active_cmd_queue;
321 struct list_head els_queue;
322 struct list_head io_retire_queue;
323 struct list_head active_tm_queue;
324
325 struct timer_list ofld_timer;
326 wait_queue_head_t ofld_wait;
327
328 struct timer_list upld_timer;
329 wait_queue_head_t upld_wait;
330};
331
332struct bnx2fc_mp_req {
333 u8 tm_flags;
334
335 u32 req_len;
336 void *req_buf;
337 dma_addr_t req_buf_dma;
338 struct fcoe_bd_ctx *mp_req_bd;
339 dma_addr_t mp_req_bd_dma;
340 struct fc_frame_header req_fc_hdr;
341
342 u32 resp_len;
343 void *resp_buf;
344 dma_addr_t resp_buf_dma;
345 struct fcoe_bd_ctx *mp_resp_bd;
346 dma_addr_t mp_resp_bd_dma;
347 struct fc_frame_header resp_fc_hdr;
348};
349
350struct bnx2fc_els_cb_arg {
351 struct bnx2fc_cmd *aborted_io_req;
352 struct bnx2fc_cmd *io_req;
353 u16 l2_oxid;
354};
355
356/* bnx2fc command structure */
357struct bnx2fc_cmd {
358 struct list_head link;
359 u8 on_active_queue;
360 u8 on_tmf_queue;
361 u8 cmd_type;
362#define BNX2FC_SCSI_CMD 1
363#define BNX2FC_TASK_MGMT_CMD 2
364#define BNX2FC_ABTS 3
365#define BNX2FC_ELS 4
366#define BNX2FC_CLEANUP 5
367 u8 io_req_flags;
368 struct kref refcount;
369 struct fcoe_port *port;
370 struct bnx2fc_rport *tgt;
371 struct scsi_cmnd *sc_cmd;
372 struct bnx2fc_cmd_mgr *cmd_mgr;
373 struct bnx2fc_mp_req mp_req;
374 void (*cb_func)(struct bnx2fc_els_cb_arg *cb_arg);
375 struct bnx2fc_els_cb_arg *cb_arg;
376 struct delayed_work timeout_work; /* timer for ULP timeouts */
377 struct completion tm_done;
378 int wait_for_comp;
379 u16 xid;
380 struct fcoe_task_ctx_entry *task;
381 struct io_bdt *bd_tbl;
382 struct fcp_rsp *rsp;
383 size_t data_xfer_len;
384 unsigned long req_flags;
385#define BNX2FC_FLAG_ISSUE_RRQ 0x1
386#define BNX2FC_FLAG_ISSUE_ABTS 0x2
387#define BNX2FC_FLAG_ABTS_DONE 0x3
388#define BNX2FC_FLAG_TM_COMPL 0x4
389#define BNX2FC_FLAG_TM_TIMEOUT 0x5
390#define BNX2FC_FLAG_IO_CLEANUP 0x6
391#define BNX2FC_FLAG_RETIRE_OXID 0x7
392#define BNX2FC_FLAG_EH_ABORT 0x8
393#define BNX2FC_FLAG_IO_COMPL 0x9
394#define BNX2FC_FLAG_ELS_DONE 0xa
395#define BNX2FC_FLAG_ELS_TIMEOUT 0xb
396 u32 fcp_resid;
397 u32 fcp_rsp_len;
398 u32 fcp_sns_len;
399 u8 cdb_status; /* SCSI IO status */
400 u8 fcp_status; /* FCP IO status */
401 u8 fcp_rsp_code;
402 u8 scsi_comp_flags;
403};
404
405struct io_bdt {
406 struct bnx2fc_cmd *io_req;
407 struct fcoe_bd_ctx *bd_tbl;
408 dma_addr_t bd_tbl_dma;
409 u16 bd_valid;
410};
411
412struct bnx2fc_work {
413 struct list_head list;
414 struct bnx2fc_rport *tgt;
415 u16 wqe;
416};
417struct bnx2fc_unsol_els {
418 struct fc_lport *lport;
419 struct fc_frame *fp;
420 struct work_struct unsol_els_work;
421};
422
423
424
425struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type);
426void bnx2fc_cmd_release(struct kref *ref);
427int bnx2fc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc_cmd);
428int bnx2fc_send_fw_fcoe_init_msg(struct bnx2fc_hba *hba);
429int bnx2fc_send_fw_fcoe_destroy_msg(struct bnx2fc_hba *hba);
430int bnx2fc_send_session_ofld_req(struct fcoe_port *port,
431 struct bnx2fc_rport *tgt);
432int bnx2fc_send_session_disable_req(struct fcoe_port *port,
433 struct bnx2fc_rport *tgt);
434int bnx2fc_send_session_destroy_req(struct bnx2fc_hba *hba,
435 struct bnx2fc_rport *tgt);
436int bnx2fc_map_doorbell(struct bnx2fc_rport *tgt);
437void bnx2fc_indicate_kcqe(void *context, struct kcqe *kcq[],
438 u32 num_cqe);
439int bnx2fc_setup_task_ctx(struct bnx2fc_hba *hba);
440void bnx2fc_free_task_ctx(struct bnx2fc_hba *hba);
441int bnx2fc_setup_fw_resc(struct bnx2fc_hba *hba);
442void bnx2fc_free_fw_resc(struct bnx2fc_hba *hba);
443struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba,
444 u16 min_xid, u16 max_xid);
445void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr);
446void bnx2fc_get_link_state(struct bnx2fc_hba *hba);
447char *bnx2fc_get_next_rqe(struct bnx2fc_rport *tgt, u8 num_items);
448void bnx2fc_return_rqe(struct bnx2fc_rport *tgt, u8 num_items);
449int bnx2fc_get_paged_crc_eof(struct sk_buff *skb, int tlen);
450int bnx2fc_send_rrq(struct bnx2fc_cmd *aborted_io_req);
451int bnx2fc_send_adisc(struct bnx2fc_rport *tgt, struct fc_frame *fp);
452int bnx2fc_send_logo(struct bnx2fc_rport *tgt, struct fc_frame *fp);
453int bnx2fc_send_rls(struct bnx2fc_rport *tgt, struct fc_frame *fp);
454int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req);
455int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req);
456void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req,
457 unsigned int timer_msec);
458int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req);
459void bnx2fc_init_cleanup_task(struct bnx2fc_cmd *io_req,
460 struct fcoe_task_ctx_entry *task,
461 u16 orig_xid);
462void bnx2fc_init_mp_task(struct bnx2fc_cmd *io_req,
463 struct fcoe_task_ctx_entry *task);
464void bnx2fc_init_task(struct bnx2fc_cmd *io_req,
465 struct fcoe_task_ctx_entry *task);
466void bnx2fc_add_2_sq(struct bnx2fc_rport *tgt, u16 xid);
467void bnx2fc_ring_doorbell(struct bnx2fc_rport *tgt);
468int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd);
469int bnx2fc_eh_host_reset(struct scsi_cmnd *sc_cmd);
470int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd);
471int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd);
472void bnx2fc_rport_event_handler(struct fc_lport *lport,
473 struct fc_rport_priv *rport,
474 enum fc_rport_event event);
475void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
476 struct fcoe_task_ctx_entry *task,
477 u8 num_rq);
478void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
479 struct fcoe_task_ctx_entry *task,
480 u8 num_rq);
481void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
482 struct fcoe_task_ctx_entry *task,
483 u8 num_rq);
484void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
485 struct fcoe_task_ctx_entry *task,
486 u8 num_rq);
487void bnx2fc_process_els_compl(struct bnx2fc_cmd *els_req,
488 struct fcoe_task_ctx_entry *task,
489 u8 num_rq);
490void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
491 struct fcp_cmnd *fcp_cmnd);
492
493
494
495void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt);
496struct fc_seq *bnx2fc_elsct_send(struct fc_lport *lport, u32 did,
497 struct fc_frame *fp, unsigned int op,
498 void (*resp)(struct fc_seq *,
499 struct fc_frame *,
500 void *),
501 void *arg, u32 timeout);
502int bnx2fc_process_new_cqes(struct bnx2fc_rport *tgt);
503void bnx2fc_process_cq_compl(struct bnx2fc_rport *tgt, u16 wqe);
504struct bnx2fc_rport *bnx2fc_tgt_lookup(struct fcoe_port *port,
505 u32 port_id);
506void bnx2fc_process_l2_frame_compl(struct bnx2fc_rport *tgt,
507 unsigned char *buf,
508 u32 frame_len, u16 l2_oxid);
509int bnx2fc_send_stat_req(struct bnx2fc_hba *hba);
510
511#endif
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