2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
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.
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
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>
33 #include "vnic_wq_copy.h"
34 #include "vnic_intr.h"
35 #include "vnic_stats.h"
36 #include "vnic_scsi.h"
38 #define DRV_NAME "fnic"
39 #define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
40 #define DRV_VERSION "1.5.0.2"
41 #define PFX DRV_NAME ": "
42 #define DFX DRV_NAME "%d: "
44 #define DESC_CLEAN_LOW_WATERMARK 8
45 #define FNIC_MAX_IO_REQ 2048 /* scsi_cmnd tag map entries */
46 #define FNIC_IO_LOCKS 64 /* IO locks: power of 2 */
47 #define FNIC_DFLT_QUEUE_DEPTH 32
48 #define FNIC_STATS_RATE_LIMIT 4 /* limit rate at which stats are pulled up */
51 * Tag bits used for special requests.
53 #define FNIC_TAG_ABORT BIT(30) /* tag bit indicating abort */
54 #define FNIC_TAG_DEV_RST BIT(29) /* indicates device reset */
55 #define FNIC_TAG_MASK (BIT(24) - 1) /* mask for lookup */
56 #define FNIC_NO_TAG -1
59 * Command flags to identify the type of command and for other future
62 #define FNIC_NO_FLAGS 0
63 #define FNIC_CDB_REQ BIT(1) /* All IOs with a valid CDB */
64 #define FNIC_BLOCKING_REQ BIT(2) /* All blocking Requests */
65 #define FNIC_DEVICE_RESET BIT(3) /* Device reset request */
66 #define FNIC_DEV_RST_PENDING BIT(4) /* Device reset pending */
67 #define FNIC_DEV_RST_TIMED_OUT BIT(5) /* Device reset timed out */
68 #define FNIC_DEV_RST_TERM_ISSUED BIT(6) /* Device reset terminate */
69 #define FNIC_DEV_RST_DONE BIT(7) /* Device reset done */
72 * Usage of the scsi_cmnd scratchpad.
73 * These fields are locked by the hashed io_req_lock.
75 #define CMD_SP(Cmnd) ((Cmnd)->SCp.ptr)
76 #define CMD_STATE(Cmnd) ((Cmnd)->SCp.phase)
77 #define CMD_ABTS_STATUS(Cmnd) ((Cmnd)->SCp.Message)
78 #define CMD_LR_STATUS(Cmnd) ((Cmnd)->SCp.have_data_in)
79 #define CMD_TAG(Cmnd) ((Cmnd)->SCp.sent_command)
80 #define CMD_FLAGS(Cmnd) ((Cmnd)->SCp.Status)
82 #define FCPIO_INVALID_CODE 0x100 /* hdr_status value unused by firmware */
84 #define FNIC_LUN_RESET_TIMEOUT 10000 /* mSec */
85 #define FNIC_HOST_RESET_TIMEOUT 10000 /* mSec */
86 #define FNIC_RMDEVICE_TIMEOUT 1000 /* mSec */
87 #define FNIC_HOST_RESET_SETTLE_TIME 30 /* Sec */
88 #define FNIC_ABT_TERM_DELAY_TIMEOUT 500 /* mSec */
90 #define FNIC_MAX_FCP_TARGET 256
93 * state_flags to identify host state along along with fnic's state
95 #define __FNIC_FLAGS_FWRESET BIT(0) /* fwreset in progress */
96 #define __FNIC_FLAGS_BLOCK_IO BIT(1) /* IOs are blocked */
98 #define FNIC_FLAGS_NONE (0)
99 #define FNIC_FLAGS_FWRESET (__FNIC_FLAGS_FWRESET | \
100 __FNIC_FLAGS_BLOCK_IO)
102 #define FNIC_FLAGS_IO_BLOCKED (__FNIC_FLAGS_BLOCK_IO)
104 #define fnic_set_state_flags(fnicp, st_flags) \
105 __fnic_set_state_flags(fnicp, st_flags, 0)
107 #define fnic_clear_state_flags(fnicp, st_flags) \
108 __fnic_set_state_flags(fnicp, st_flags, 1)
110 extern unsigned int fnic_log_level;
112 #define FNIC_MAIN_LOGGING 0x01
113 #define FNIC_FCS_LOGGING 0x02
114 #define FNIC_SCSI_LOGGING 0x04
115 #define FNIC_ISR_LOGGING 0x08
117 #define FNIC_CHECK_LOGGING(LEVEL, CMD) \
119 if (unlikely(fnic_log_level & LEVEL)) \
125 #define FNIC_MAIN_DBG(kern_level, host, fmt, args...) \
126 FNIC_CHECK_LOGGING(FNIC_MAIN_LOGGING, \
127 shost_printk(kern_level, host, fmt, ##args);)
129 #define FNIC_FCS_DBG(kern_level, host, fmt, args...) \
130 FNIC_CHECK_LOGGING(FNIC_FCS_LOGGING, \
131 shost_printk(kern_level, host, fmt, ##args);)
133 #define FNIC_SCSI_DBG(kern_level, host, fmt, args...) \
134 FNIC_CHECK_LOGGING(FNIC_SCSI_LOGGING, \
135 shost_printk(kern_level, host, fmt, ##args);)
137 #define FNIC_ISR_DBG(kern_level, host, fmt, args...) \
138 FNIC_CHECK_LOGGING(FNIC_ISR_LOGGING, \
139 shost_printk(kern_level, host, fmt, ##args);)
141 extern const char *fnic_state_str[];
143 enum fnic_intx_intr_index {
144 FNIC_INTX_WQ_RQ_COPYWQ,
150 enum fnic_msix_intr_index {
154 FNIC_MSIX_ERR_NOTIFY,
158 struct fnic_msix_entry {
160 char devname[IFNAMSIZ];
161 irqreturn_t (*isr)(int, void *);
167 FNIC_IN_FC_TRANS_ETH_MODE,
169 FNIC_IN_ETH_TRANS_FC_MODE,
172 #define FNIC_WQ_COPY_MAX 1
173 #define FNIC_WQ_MAX 1
174 #define FNIC_RQ_MAX 1
175 #define FNIC_CQ_MAX (FNIC_WQ_COPY_MAX + FNIC_WQ_MAX + FNIC_RQ_MAX)
179 /* Per-instance private data structure */
181 struct fc_lport *lport;
182 struct fcoe_ctlr ctlr; /* FIP FCoE controller structure */
183 struct vnic_dev_bar bar0;
185 struct msix_entry msix_entry[FNIC_MSIX_INTR_MAX];
186 struct fnic_msix_entry msix[FNIC_MSIX_INTR_MAX];
188 struct vnic_stats *stats;
189 unsigned long stats_time; /* time of stats update */
190 struct vnic_nic_cfg *nic_cfg;
192 struct timer_list notify_timer; /* used for MSI interrupts */
194 unsigned int err_intr_offset;
195 unsigned int link_intr_offset;
197 unsigned int wq_count;
198 unsigned int cq_count;
200 u32 vlan_hw_insert:1; /* let hw insert the tag */
201 u32 in_remove:1; /* fnic device in removal */
202 u32 stop_rx_link_events:1; /* stop proc. rx frames, link events */
204 struct completion *remove_wait; /* device remove thread blocks */
206 atomic_t in_flight; /* io counter */
207 u32 _reserved; /* fill hole */
208 unsigned long state_flags; /* protected by host lock */
209 enum fnic_state state;
210 spinlock_t fnic_lock;
212 u16 vlan_id; /* VLAN tag including priority */
213 u8 data_src_addr[ETH_ALEN];
214 u64 fcp_input_bytes; /* internal statistic */
215 u64 fcp_output_bytes; /* internal statistic */
219 struct list_head list;
220 struct pci_dev *pdev;
221 struct vnic_fc_config config;
222 struct vnic_dev *vdev;
223 unsigned int raw_wq_count;
224 unsigned int wq_copy_count;
225 unsigned int rq_count;
226 int fw_ack_index[FNIC_WQ_COPY_MAX];
227 unsigned short fw_ack_recd[FNIC_WQ_COPY_MAX];
228 unsigned short wq_copy_desc_low[FNIC_WQ_COPY_MAX];
229 unsigned int intr_count;
230 u32 __iomem *legacy_pba;
231 struct fnic_host_tag *tags;
232 mempool_t *io_req_pool;
233 mempool_t *io_sgl_pool[FNIC_SGL_NUM_CACHES];
234 spinlock_t io_req_lock[FNIC_IO_LOCKS]; /* locks for scsi cmnds */
236 struct work_struct link_work;
237 struct work_struct frame_work;
238 struct sk_buff_head frame_queue;
239 struct sk_buff_head tx_queue;
241 /* copy work queue cache line section */
242 ____cacheline_aligned struct vnic_wq_copy wq_copy[FNIC_WQ_COPY_MAX];
243 /* completion queue cache line section */
244 ____cacheline_aligned struct vnic_cq cq[FNIC_CQ_MAX];
246 spinlock_t wq_copy_lock[FNIC_WQ_COPY_MAX];
248 /* work queue cache line section */
249 ____cacheline_aligned struct vnic_wq wq[FNIC_WQ_MAX];
250 spinlock_t wq_lock[FNIC_WQ_MAX];
252 /* receive queue cache line section */
253 ____cacheline_aligned struct vnic_rq rq[FNIC_RQ_MAX];
255 /* interrupt resource cache line section */
256 ____cacheline_aligned struct vnic_intr intr[FNIC_MSIX_INTR_MAX];
259 static inline struct fnic *fnic_from_ctlr(struct fcoe_ctlr *fip)
261 return container_of(fip, struct fnic, ctlr);
264 extern struct workqueue_struct *fnic_event_queue;
265 extern struct device_attribute *fnic_attrs[];
267 void fnic_clear_intr_mode(struct fnic *fnic);
268 int fnic_set_intr_mode(struct fnic *fnic);
269 void fnic_free_intr(struct fnic *fnic);
270 int fnic_request_intr(struct fnic *fnic);
272 int fnic_send(struct fc_lport *, struct fc_frame *);
273 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf);
274 void fnic_handle_frame(struct work_struct *work);
275 void fnic_handle_link(struct work_struct *work);
276 int fnic_rq_cmpl_handler(struct fnic *fnic, int);
277 int fnic_alloc_rq_frame(struct vnic_rq *rq);
278 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf);
279 void fnic_flush_tx(struct fnic *);
280 void fnic_eth_send(struct fcoe_ctlr *, struct sk_buff *skb);
281 void fnic_set_port_id(struct fc_lport *, u32, struct fc_frame *);
282 void fnic_update_mac(struct fc_lport *, u8 *new);
283 void fnic_update_mac_locked(struct fnic *, u8 *new);
285 int fnic_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
286 int fnic_abort_cmd(struct scsi_cmnd *);
287 int fnic_device_reset(struct scsi_cmnd *);
288 int fnic_host_reset(struct scsi_cmnd *);
289 int fnic_reset(struct Scsi_Host *);
290 void fnic_scsi_cleanup(struct fc_lport *);
291 void fnic_scsi_abort_io(struct fc_lport *);
292 void fnic_empty_scsi_cleanup(struct fc_lport *);
293 void fnic_exch_mgr_reset(struct fc_lport *, u32, u32);
294 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int);
295 int fnic_wq_cmpl_handler(struct fnic *fnic, int);
296 int fnic_flogi_reg_handler(struct fnic *fnic, u32);
297 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
298 struct fcpio_host_req *desc);
299 int fnic_fw_reset_handler(struct fnic *fnic);
300 void fnic_terminate_rport_io(struct fc_rport *);
301 const char *fnic_state_to_str(unsigned int state);
303 void fnic_log_q_error(struct fnic *fnic);
304 void fnic_handle_link_event(struct fnic *fnic);
307 fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
309 return ((fnic->state_flags & st_flags) == st_flags);
311 void __fnic_set_state_flags(struct fnic *, unsigned long, unsigned long);
312 #endif /* _FNIC_H_ */