1 /*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18 #ifndef _FNIC_H_
19 #define _FNIC_H_
20
21 #include <linux/interrupt.h>
22 #include <linux/netdevice.h>
23 #include <linux/workqueue.h>
24 #include <linux/bitops.h>
25 #include <scsi/libfc.h>
26 #include <scsi/libfcoe.h>
27 #include "fnic_io.h"
28 #include "fnic_res.h"
29 #include "fnic_trace.h"
30 #include "fnic_stats.h"
31 #include "vnic_dev.h"
32 #include "vnic_wq.h"
33 #include "vnic_rq.h"
34 #include "vnic_cq.h"
35 #include "vnic_wq_copy.h"
36 #include "vnic_intr.h"
37 #include "vnic_stats.h"
38 #include "vnic_scsi.h"
39
40 #define DRV_NAME "fnic"
41 #define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
42 #define DRV_VERSION "1.6.0.21"
43 #define PFX DRV_NAME ": "
44 #define DFX DRV_NAME "%d: "
45
46 #define DESC_CLEAN_LOW_WATERMARK 8
47 #define FNIC_UCSM_DFLT_THROTTLE_CNT_BLD 16 /* UCSM default throttle count */
48 #define FNIC_MIN_IO_REQ 256 /* Min IO throttle count */
49 #define FNIC_MAX_IO_REQ 1024 /* scsi_cmnd tag map entries */
50 #define FNIC_DFLT_IO_REQ 256 /* Default scsi_cmnd tag map entries */
51 #define FNIC_IO_LOCKS 64 /* IO locks: power of 2 */
52 #define FNIC_DFLT_QUEUE_DEPTH 32
53 #define FNIC_STATS_RATE_LIMIT 4 /* limit rate at which stats are pulled up */
54
55 /*
56 * Tag bits used for special requests.
57 */
58 #define FNIC_TAG_ABORT BIT(30) /* tag bit indicating abort */
59 #define FNIC_TAG_DEV_RST BIT(29) /* indicates device reset */
60 #define FNIC_TAG_MASK (BIT(24) - 1) /* mask for lookup */
61 #define FNIC_NO_TAG -1
62
63 /*
64 * Command flags to identify the type of command and for other future
65 * use.
66 */
67 #define FNIC_NO_FLAGS 0
68 #define FNIC_IO_INITIALIZED BIT(0)
69 #define FNIC_IO_ISSUED BIT(1)
70 #define FNIC_IO_DONE BIT(2)
71 #define FNIC_IO_REQ_NULL BIT(3)
72 #define FNIC_IO_ABTS_PENDING BIT(4)
73 #define FNIC_IO_ABORTED BIT(5)
74 #define FNIC_IO_ABTS_ISSUED BIT(6)
75 #define FNIC_IO_TERM_ISSUED BIT(7)
76 #define FNIC_IO_INTERNAL_TERM_ISSUED BIT(8)
77 #define FNIC_IO_ABT_TERM_DONE BIT(9)
78 #define FNIC_IO_ABT_TERM_REQ_NULL BIT(10)
79 #define FNIC_IO_ABT_TERM_TIMED_OUT BIT(11)
80 #define FNIC_DEVICE_RESET BIT(12) /* Device reset request */
81 #define FNIC_DEV_RST_ISSUED BIT(13)
82 #define FNIC_DEV_RST_TIMED_OUT BIT(14)
83 #define FNIC_DEV_RST_ABTS_ISSUED BIT(15)
84 #define FNIC_DEV_RST_TERM_ISSUED BIT(16)
85 #define FNIC_DEV_RST_DONE BIT(17)
86 #define FNIC_DEV_RST_REQ_NULL BIT(18)
87 #define FNIC_DEV_RST_ABTS_DONE BIT(19)
88 #define FNIC_DEV_RST_TERM_DONE BIT(20)
89 #define FNIC_DEV_RST_ABTS_PENDING BIT(21)
90
91 /*
92 * Usage of the scsi_cmnd scratchpad.
93 * These fields are locked by the hashed io_req_lock.
94 */
95 #define CMD_SP(Cmnd) ((Cmnd)->SCp.ptr)
96 #define CMD_STATE(Cmnd) ((Cmnd)->SCp.phase)
97 #define CMD_ABTS_STATUS(Cmnd) ((Cmnd)->SCp.Message)
98 #define CMD_LR_STATUS(Cmnd) ((Cmnd)->SCp.have_data_in)
99 #define CMD_TAG(Cmnd) ((Cmnd)->SCp.sent_command)
100 #define CMD_FLAGS(Cmnd) ((Cmnd)->SCp.Status)
101
102 #define FCPIO_INVALID_CODE 0x100 /* hdr_status value unused by firmware */
103
104 #define FNIC_LUN_RESET_TIMEOUT 10000 /* mSec */
105 #define FNIC_HOST_RESET_TIMEOUT 10000 /* mSec */
106 #define FNIC_RMDEVICE_TIMEOUT 1000 /* mSec */
107 #define FNIC_HOST_RESET_SETTLE_TIME 30 /* Sec */
108 #define FNIC_ABT_TERM_DELAY_TIMEOUT 500 /* mSec */
109
110 #define FNIC_MAX_FCP_TARGET 256
111
112 /**
113 * state_flags to identify host state along along with fnic's state
114 **/
115 #define __FNIC_FLAGS_FWRESET BIT(0) /* fwreset in progress */
116 #define __FNIC_FLAGS_BLOCK_IO BIT(1) /* IOs are blocked */
117
118 #define FNIC_FLAGS_NONE (0)
119 #define FNIC_FLAGS_FWRESET (__FNIC_FLAGS_FWRESET | \
120 __FNIC_FLAGS_BLOCK_IO)
121
122 #define FNIC_FLAGS_IO_BLOCKED (__FNIC_FLAGS_BLOCK_IO)
123
124 #define fnic_set_state_flags(fnicp, st_flags) \
125 __fnic_set_state_flags(fnicp, st_flags, 0)
126
127 #define fnic_clear_state_flags(fnicp, st_flags) \
128 __fnic_set_state_flags(fnicp, st_flags, 1)
129
130 extern unsigned int fnic_log_level;
131
132 #define FNIC_MAIN_LOGGING 0x01
133 #define FNIC_FCS_LOGGING 0x02
134 #define FNIC_SCSI_LOGGING 0x04
135 #define FNIC_ISR_LOGGING 0x08
136
137 #define FNIC_CHECK_LOGGING(LEVEL, CMD) \
138 do { \
139 if (unlikely(fnic_log_level & LEVEL)) \
140 do { \
141 CMD; \
142 } while (0); \
143 } while (0)
144
145 #define FNIC_MAIN_DBG(kern_level, host, fmt, args...) \
146 FNIC_CHECK_LOGGING(FNIC_MAIN_LOGGING, \
147 shost_printk(kern_level, host, fmt, ##args);)
148
149 #define FNIC_FCS_DBG(kern_level, host, fmt, args...) \
150 FNIC_CHECK_LOGGING(FNIC_FCS_LOGGING, \
151 shost_printk(kern_level, host, fmt, ##args);)
152
153 #define FNIC_SCSI_DBG(kern_level, host, fmt, args...) \
154 FNIC_CHECK_LOGGING(FNIC_SCSI_LOGGING, \
155 shost_printk(kern_level, host, fmt, ##args);)
156
157 #define FNIC_ISR_DBG(kern_level, host, fmt, args...) \
158 FNIC_CHECK_LOGGING(FNIC_ISR_LOGGING, \
159 shost_printk(kern_level, host, fmt, ##args);)
160
161 #define FNIC_MAIN_NOTE(kern_level, host, fmt, args...) \
162 shost_printk(kern_level, host, fmt, ##args)
163
164 extern const char *fnic_state_str[];
165
166 enum fnic_intx_intr_index {
167 FNIC_INTX_WQ_RQ_COPYWQ,
168 FNIC_INTX_ERR,
169 FNIC_INTX_NOTIFY,
170 FNIC_INTX_INTR_MAX,
171 };
172
173 enum fnic_msix_intr_index {
174 FNIC_MSIX_RQ,
175 FNIC_MSIX_WQ,
176 FNIC_MSIX_WQ_COPY,
177 FNIC_MSIX_ERR_NOTIFY,
178 FNIC_MSIX_INTR_MAX,
179 };
180
181 struct fnic_msix_entry {
182 int requested;
183 char devname[IFNAMSIZ];
184 irqreturn_t (*isr)(int, void *);
185 void *devid;
186 };
187
188 enum fnic_state {
189 FNIC_IN_FC_MODE = 0,
190 FNIC_IN_FC_TRANS_ETH_MODE,
191 FNIC_IN_ETH_MODE,
192 FNIC_IN_ETH_TRANS_FC_MODE,
193 };
194
195 #define FNIC_WQ_COPY_MAX 1
196 #define FNIC_WQ_MAX 1
197 #define FNIC_RQ_MAX 1
198 #define FNIC_CQ_MAX (FNIC_WQ_COPY_MAX + FNIC_WQ_MAX + FNIC_RQ_MAX)
199
200 struct mempool;
201
202 enum fnic_evt {
203 FNIC_EVT_START_VLAN_DISC = 1,
204 FNIC_EVT_START_FCF_DISC = 2,
205 FNIC_EVT_MAX,
206 };
207
208 struct fnic_event {
209 struct list_head list;
210 struct fnic *fnic;
211 enum fnic_evt event;
212 };
213
214 /* Per-instance private data structure */
215 struct fnic {
216 struct fc_lport *lport;
217 struct fcoe_ctlr ctlr; /* FIP FCoE controller structure */
218 struct vnic_dev_bar bar0;
219
220 struct msix_entry msix_entry[FNIC_MSIX_INTR_MAX];
221 struct fnic_msix_entry msix[FNIC_MSIX_INTR_MAX];
222
223 struct vnic_stats *stats;
224 unsigned long stats_time; /* time of stats update */
225 unsigned long stats_reset_time; /* time of stats reset */
226 struct vnic_nic_cfg *nic_cfg;
227 char name[IFNAMSIZ];
228 struct timer_list notify_timer; /* used for MSI interrupts */
229
230 unsigned int fnic_max_tag_id;
231 unsigned int err_intr_offset;
232 unsigned int link_intr_offset;
233
234 unsigned int wq_count;
235 unsigned int cq_count;
236
237 struct dentry *fnic_stats_debugfs_host;
238 struct dentry *fnic_stats_debugfs_file;
239 struct dentry *fnic_reset_debugfs_file;
240 unsigned int reset_stats;
241 atomic64_t io_cmpl_skip;
242 struct fnic_stats fnic_stats;
243
244 u32 vlan_hw_insert:1; /* let hw insert the tag */
245 u32 in_remove:1; /* fnic device in removal */
246 u32 stop_rx_link_events:1; /* stop proc. rx frames, link events */
247
248 struct completion *remove_wait; /* device remove thread blocks */
249
250 atomic_t in_flight; /* io counter */
251 bool internal_reset_inprogress;
252 u32 _reserved; /* fill hole */
253 unsigned long state_flags; /* protected by host lock */
254 enum fnic_state state;
255 spinlock_t fnic_lock;
256
257 u16 vlan_id; /* VLAN tag including priority */
258 u8 data_src_addr[ETH_ALEN];
259 u64 fcp_input_bytes; /* internal statistic */
260 u64 fcp_output_bytes; /* internal statistic */
261 u32 link_down_cnt;
262 int link_status;
263
264 struct list_head list;
265 struct pci_dev *pdev;
266 struct vnic_fc_config config;
267 struct vnic_dev *vdev;
268 unsigned int raw_wq_count;
269 unsigned int wq_copy_count;
270 unsigned int rq_count;
271 int fw_ack_index[FNIC_WQ_COPY_MAX];
272 unsigned short fw_ack_recd[FNIC_WQ_COPY_MAX];
273 unsigned short wq_copy_desc_low[FNIC_WQ_COPY_MAX];
274 unsigned int intr_count;
275 u32 __iomem *legacy_pba;
276 struct fnic_host_tag *tags;
277 mempool_t *io_req_pool;
278 mempool_t *io_sgl_pool[FNIC_SGL_NUM_CACHES];
279 spinlock_t io_req_lock[FNIC_IO_LOCKS]; /* locks for scsi cmnds */
280
281 struct work_struct link_work;
282 struct work_struct frame_work;
283 struct sk_buff_head frame_queue;
284 struct sk_buff_head tx_queue;
285
286 /*** FIP related data members -- start ***/
287 void (*set_vlan)(struct fnic *, u16 vlan);
288 struct work_struct fip_frame_work;
289 struct sk_buff_head fip_frame_queue;
290 struct timer_list fip_timer;
291 struct list_head vlans;
292 spinlock_t vlans_lock;
293
294 struct work_struct event_work;
295 struct list_head evlist;
296 /*** FIP related data members -- end ***/
297
298 /* copy work queue cache line section */
299 ____cacheline_aligned struct vnic_wq_copy wq_copy[FNIC_WQ_COPY_MAX];
300 /* completion queue cache line section */
301 ____cacheline_aligned struct vnic_cq cq[FNIC_CQ_MAX];
302
303 spinlock_t wq_copy_lock[FNIC_WQ_COPY_MAX];
304
305 /* work queue cache line section */
306 ____cacheline_aligned struct vnic_wq wq[FNIC_WQ_MAX];
307 spinlock_t wq_lock[FNIC_WQ_MAX];
308
309 /* receive queue cache line section */
310 ____cacheline_aligned struct vnic_rq rq[FNIC_RQ_MAX];
311
312 /* interrupt resource cache line section */
313 ____cacheline_aligned struct vnic_intr intr[FNIC_MSIX_INTR_MAX];
314 };
315
fnic_from_ctlr(struct fcoe_ctlr * fip)316 static inline struct fnic *fnic_from_ctlr(struct fcoe_ctlr *fip)
317 {
318 return container_of(fip, struct fnic, ctlr);
319 }
320
321 extern struct workqueue_struct *fnic_event_queue;
322 extern struct workqueue_struct *fnic_fip_queue;
323 extern struct device_attribute *fnic_attrs[];
324
325 void fnic_clear_intr_mode(struct fnic *fnic);
326 int fnic_set_intr_mode(struct fnic *fnic);
327 void fnic_free_intr(struct fnic *fnic);
328 int fnic_request_intr(struct fnic *fnic);
329
330 int fnic_send(struct fc_lport *, struct fc_frame *);
331 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf);
332 void fnic_handle_frame(struct work_struct *work);
333 void fnic_handle_link(struct work_struct *work);
334 void fnic_handle_event(struct work_struct *work);
335 int fnic_rq_cmpl_handler(struct fnic *fnic, int);
336 int fnic_alloc_rq_frame(struct vnic_rq *rq);
337 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf);
338 void fnic_flush_tx(struct fnic *);
339 void fnic_eth_send(struct fcoe_ctlr *, struct sk_buff *skb);
340 void fnic_set_port_id(struct fc_lport *, u32, struct fc_frame *);
341 void fnic_update_mac(struct fc_lport *, u8 *new);
342 void fnic_update_mac_locked(struct fnic *, u8 *new);
343
344 int fnic_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
345 int fnic_abort_cmd(struct scsi_cmnd *);
346 int fnic_device_reset(struct scsi_cmnd *);
347 int fnic_host_reset(struct scsi_cmnd *);
348 int fnic_reset(struct Scsi_Host *);
349 void fnic_scsi_cleanup(struct fc_lport *);
350 void fnic_scsi_abort_io(struct fc_lport *);
351 void fnic_empty_scsi_cleanup(struct fc_lport *);
352 void fnic_exch_mgr_reset(struct fc_lport *, u32, u32);
353 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int);
354 int fnic_wq_cmpl_handler(struct fnic *fnic, int);
355 int fnic_flogi_reg_handler(struct fnic *fnic, u32);
356 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
357 struct fcpio_host_req *desc);
358 int fnic_fw_reset_handler(struct fnic *fnic);
359 void fnic_terminate_rport_io(struct fc_rport *);
360 const char *fnic_state_to_str(unsigned int state);
361
362 void fnic_log_q_error(struct fnic *fnic);
363 void fnic_handle_link_event(struct fnic *fnic);
364
365 int fnic_is_abts_pending(struct fnic *, struct scsi_cmnd *);
366
367 void fnic_handle_fip_frame(struct work_struct *work);
368 void fnic_handle_fip_event(struct fnic *fnic);
369 void fnic_fcoe_reset_vlans(struct fnic *fnic);
370 void fnic_fcoe_evlist_free(struct fnic *fnic);
371 extern void fnic_handle_fip_timer(struct fnic *fnic);
372
373 static inline int
fnic_chk_state_flags_locked(struct fnic * fnic,unsigned long st_flags)374 fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
375 {
376 return ((fnic->state_flags & st_flags) == st_flags);
377 }
378 void __fnic_set_state_flags(struct fnic *, unsigned long, unsigned long);
379 void fnic_dump_fchost_stats(struct Scsi_Host *, struct fc_host_statistics *);
380 #endif /* _FNIC_H_ */
381