2 * Copyright (c) 2001 Michael Smith
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * CISS adapter driver datastructures
33 /************************************************************************
38 * There is no guaranteed upper bound on the number of concurrent
39 * commands an adapter may claim to support. Cap it at a reasonable
42 #define CISS_MAX_REQUESTS 256
45 * Maximum number of logical drives we support.
47 #define CISS_MAX_LOGICAL 15
50 * Maximum number of physical devices we support.
52 #define CISS_MAX_PHYSICAL 1024
55 * Interrupt reduction can be controlled by tuning the interrupt
56 * coalesce delay and count paramters. The delay (in microseconds)
57 * defers delivery of interrupts to increase the chance of there being
58 * more than one completed command ready when the interrupt is
59 * delivered. The count expedites the delivery of the interrupt when
60 * the given number of commands are ready.
62 * If the delay is set to 0, interrupts are delivered immediately.
64 #define CISS_INTERRUPT_COALESCE_DELAY 1000
65 #define CISS_INTERRUPT_COALESCE_COUNT 16
68 * Heartbeat routine timeout in seconds. Note that since event
69 * handling is performed on a callback basis, we don't need this to
72 #define CISS_HEARTBEAT_RATE 10
74 /************************************************************************
75 * Compatibility with older versions of FreeBSD
77 #if __FreeBSD_version < 440001
78 #warning testing old-FreeBSD compat
79 typedef struct proc d_thread_t;
82 /************************************************************************
83 * Command queue statistics
88 #define CISSQ_COMPLETE 2
89 #define CISSQ_NOTIFY 3
98 /************************************************************************
99 * Driver version. Only really significant to the ACU interface.
101 #define CISS_DRIVER_VERSION 20011201
103 /************************************************************************
104 * Driver data structures
108 * Each command issued to the adapter is managed by a request
113 TAILQ_ENTRY(ciss_request) cr_link;
114 int cr_onq; /* which queue we are on */
116 struct ciss_softc *cr_sc; /* controller softc */
117 void *cr_data; /* data buffer */
118 u_int32_t cr_length; /* data length */
119 bus_dmamap_t cr_datamap; /* DMA map for data */
122 #define CISS_REQ_MAPPED (1<<0) /* data mapped */
123 #define CISS_REQ_SLEEP (1<<1) /* submitter sleeping */
124 #define CISS_REQ_POLL (1<<2) /* submitter polling */
125 #define CISS_REQ_DATAOUT (1<<3) /* data host->adapter */
126 #define CISS_REQ_DATAIN (1<<4) /* data adapter->host */
128 void (* cr_complete)(struct ciss_request *);
133 * The adapter command structure is defined with a zero-length
134 * scatter/gather list size. In practise, we want space for a
135 * scatter-gather list, and we also want to avoid having commands
136 * cross page boundaries.
138 * Note that 512 bytes yields 28 scatter/gather entries, or the
139 * ability to map (26 * PAGE_SIZE) + 2 bytes of data. On x86, this is
140 * 104kB. 256 bytes would only yield 12 entries, giving a mere 40kB,
144 #define CISS_COMMAND_ALLOC_SIZE 512 /* XXX tune to get sensible s/g list length */
145 #define CISS_COMMAND_SG_LENGTH ((CISS_COMMAND_ALLOC_SIZE - sizeof(struct ciss_command)) \
146 / sizeof(struct ciss_sg_entry))
149 * Per-logical-drive data.
153 union ciss_device_address cl_address;
154 union ciss_device_address *cl_controller;
156 #define CISS_LD_NONEXISTENT 0
157 #define CISS_LD_ONLINE 1
158 #define CISS_LD_OFFLINE 2
162 struct ciss_bmic_id_ldrive *cl_ldrive;
163 struct ciss_bmic_id_lstatus *cl_lstatus;
164 struct ciss_ldrive_geometry cl_geometry;
166 char cl_name[16]; /* device name */
170 * Per-physical-drive data
174 union ciss_device_address cp_address;
178 #define CISS_PHYSICAL_SHIFT 5
179 #define CISS_PHYSICAL_BASE (1 << CISS_PHYSICAL_SHIFT)
180 #define CISS_MAX_PHYSTGT 15
182 #define CISS_IS_PHYSICAL(bus) (bus >= CISS_PHYSICAL_BASE)
183 #define CISS_CAM_TO_PBUS(bus) (bus - CISS_PHYSICAL_BASE)
190 /* bus connections */
191 device_t ciss_dev; /* bus attachment */
192 struct cdev *ciss_dev_t; /* control device */
194 struct resource *ciss_regs_resource; /* register interface window */
195 int ciss_regs_rid; /* resource ID */
196 bus_space_handle_t ciss_regs_bhandle; /* bus space handle */
197 bus_space_tag_t ciss_regs_btag; /* bus space tag */
199 struct resource *ciss_cfg_resource; /* config struct interface window */
200 int ciss_cfg_rid; /* resource ID */
201 struct ciss_config_table *ciss_cfg; /* config table in adapter memory */
202 struct ciss_bmic_id_table *ciss_id; /* ID table in host memory */
203 u_int32_t ciss_heartbeat; /* last heartbeat value */
204 int ciss_heart_attack; /* number of times we have seen this value */
206 struct resource *ciss_irq_resource; /* interrupt */
207 int ciss_irq_rid; /* resource ID */
208 void *ciss_intr; /* interrupt handle */
210 bus_dma_tag_t ciss_parent_dmat; /* parent DMA tag */
211 bus_dma_tag_t ciss_buffer_dmat; /* data buffer/command DMA tag */
213 u_int32_t ciss_interrupt_mask; /* controller interrupt mask bits */
215 int ciss_max_requests;
216 struct ciss_request ciss_request[CISS_MAX_REQUESTS]; /* requests */
217 void *ciss_command; /* command structures */
218 bus_dma_tag_t ciss_command_dmat; /* command DMA tag */
219 bus_dmamap_t ciss_command_map; /* command DMA map */
220 u_int32_t ciss_command_phys; /* command array base address */
221 TAILQ_HEAD(,ciss_request) ciss_free; /* requests available for reuse */
222 TAILQ_HEAD(,ciss_request) ciss_busy; /* requests in the adapter */
223 TAILQ_HEAD(,ciss_request) ciss_complete; /* requests which have been returned by the adapter */
224 TAILQ_HEAD(,ciss_request) ciss_notify; /* requests which are defered for processing */
225 struct proc *ciss_notify_thread;
227 struct callout ciss_periodic; /* periodic event handling */
228 struct ciss_request *ciss_periodic_notify; /* notify callback request */
231 struct ciss_ldrive **ciss_logical;
232 struct ciss_pdrive **ciss_physical;
233 union ciss_device_address *ciss_controllers; /* controller address */
234 int ciss_max_bus_number; /* maximum bus number */
235 int ciss_max_logical_bus;
236 int ciss_max_physical_bus;
238 struct cam_devq *ciss_cam_devq;
239 struct cam_sim **ciss_cam_sim;
244 #define CISS_FLAG_NOTIFY_OK (1<<0) /* notify command running OK */
245 #define CISS_FLAG_CONTROL_OPEN (1<<1) /* control device is open */
246 #define CISS_FLAG_ABORTING (1<<2) /* driver is going away */
247 #define CISS_FLAG_RUNNING (1<<3) /* driver is running (interrupts usable) */
249 #define CISS_FLAG_FAKE_SYNCH (1<<16) /* needs SYNCHRONISE_CACHE faked */
250 #define CISS_FLAG_BMIC_ABORT (1<<17) /* use BMIC command to abort Notify on Event */
251 #define CISS_FLAG_THREAD_SHUT (1<<20) /* shutdown the kthread */
253 struct ciss_qstat ciss_qstat[CISSQ_COUNT]; /* queue statistics */
257 * Given a request tag, find the corresponding command in virtual or
260 * The arithmetic here is due to the allocation of ciss_command structures
261 * inside CISS_COMMAND_ALLOC_SIZE blocks. See the comment at the definition
262 * of CISS_COMMAND_ALLOC_SIZE above.
264 #define CISS_FIND_COMMAND(cr) \
265 (struct ciss_command *)((u_int8_t *)(cr)->cr_sc->ciss_command + \
266 ((cr)->cr_tag * CISS_COMMAND_ALLOC_SIZE))
267 #define CISS_FIND_COMMANDPHYS(cr) ((cr)->cr_sc->ciss_command_phys + \
268 ((cr)->cr_tag * CISS_COMMAND_ALLOC_SIZE))
270 /************************************************************************
271 * Debugging/diagnostic output.
276 * 0 - quiet, only emit warnings
277 * 1 - talkative, log major events, but nothing on the I/O path
278 * 2 - noisy, log events on the I/O path
279 * 3 - extremely noisy, log items in loops
282 # define debug(level, fmt, args...) \
284 if (level <= CISS_DEBUG) printf("%s: " fmt "\n", __func__ , ##args); \
286 # define debug_called(level) \
288 if (level <= CISS_DEBUG) printf("%s: called\n", __func__); \
290 # define debug_struct(s) printf(" SIZE %s: %zu\n", #s, sizeof(struct s))
291 # define debug_union(s) printf(" SIZE %s: %zu\n", #s, sizeof(union s))
292 # define debug_type(s) printf(" SIZE %s: %zu\n", #s, sizeof(s))
293 # define debug_field(s, f) printf(" OFFSET %s.%s: %d\n", #s, #f, ((int)&(((struct s *)0)->f)))
294 # define debug_const(c) printf(" CONST %s %jd/0x%jx\n", #c, (intmax_t)c, (intmax_t)c);
296 # define debug(level, fmt, args...)
297 # define debug_called(level)
298 # define debug_struct(s)
299 # define debug_union(s)
300 # define debug_type(s)
301 # define debug_field(s, f)
302 # define debug_const(c)
305 #define ciss_printf(sc, fmt, args...) device_printf(sc->ciss_dev, fmt , ##args)
307 /************************************************************************
311 #define CISSQ_ADD(sc, qname) \
313 struct ciss_qstat *qs = &(sc)->ciss_qstat[qname]; \
316 if (qs->q_length > qs->q_max) \
317 qs->q_max = qs->q_length; \
320 #define CISSQ_REMOVE(sc, qname) (sc)->ciss_qstat[qname].q_length--
321 #define CISSQ_INIT(sc, qname) \
323 sc->ciss_qstat[qname].q_length = 0; \
324 sc->ciss_qstat[qname].q_max = 0; \
328 #define CISSQ_REQUEST_QUEUE(name, index) \
329 static __inline void \
330 ciss_initq_ ## name (struct ciss_softc *sc) \
332 TAILQ_INIT(&sc->ciss_ ## name); \
333 CISSQ_INIT(sc, index); \
335 static __inline void \
336 ciss_enqueue_ ## name (struct ciss_request *cr) \
341 TAILQ_INSERT_TAIL(&cr->cr_sc->ciss_ ## name, cr, cr_link); \
342 CISSQ_ADD(cr->cr_sc, index); \
343 cr->cr_onq = index; \
346 static __inline void \
347 ciss_requeue_ ## name (struct ciss_request *cr) \
352 TAILQ_INSERT_HEAD(&cr->cr_sc->ciss_ ## name, cr, cr_link); \
353 CISSQ_ADD(cr->cr_sc, index); \
354 cr->cr_onq = index; \
357 static __inline struct ciss_request * \
358 ciss_dequeue_ ## name (struct ciss_softc *sc) \
360 struct ciss_request *cr; \
364 if ((cr = TAILQ_FIRST(&sc->ciss_ ## name)) != NULL) { \
365 TAILQ_REMOVE(&sc->ciss_ ## name, cr, cr_link); \
366 CISSQ_REMOVE(sc, index); \
372 static __inline int \
373 ciss_remove_ ## name (struct ciss_request *cr) \
378 if (cr->cr_onq != index) { \
379 printf("request on queue %d (expected %d)\n", cr->cr_onq, index);\
382 TAILQ_REMOVE(&cr->cr_sc->ciss_ ## name, cr, cr_link); \
383 CISSQ_REMOVE(cr->cr_sc, index); \
392 CISSQ_REQUEST_QUEUE(free, CISSQ_FREE);
393 CISSQ_REQUEST_QUEUE(busy, CISSQ_BUSY);
394 CISSQ_REQUEST_QUEUE(complete, CISSQ_COMPLETE);
395 CISSQ_REQUEST_QUEUE(notify, CISSQ_NOTIFY);
397 /********************************************************************************
398 * space-fill a character string
401 padstr(char *targ, const char *src, int len)