2 * Copyright (c) 2000, 2001 Michael Smith
3 * Copyright (c) 2000 BSDi
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/sys/dev/mly/mlyvar.h,v 1.1.2.2 2001/03/05 20:17:24 msmith Exp $
30 /********************************************************************************
31 ********************************************************************************
32 Driver Parameter Definitions
33 ********************************************************************************
34 ********************************************************************************/
37 * The firmware interface allows for a 16-bit command identifier. A lookup
38 * table this size (256k) would be too expensive, so we cap ourselves at a
41 #define MLY_MAXCOMMANDS 256 /* max commands per controller */
44 * The firmware interface allows for a 16-bit s/g list length. We limit
45 * ourselves to a reasonable maximum and ensure alignment.
47 #define MLY_MAXSGENTRIES 64 /* max S/G entries, limit 65535 */
49 /********************************************************************************
50 ********************************************************************************
51 Cross-version Compatibility
52 ********************************************************************************
53 ********************************************************************************/
55 #if __FreeBSD_version >= 500005
56 # include <sys/taskqueue.h>
59 #if __FreeBSD_version <= 500014
60 # include <machine/clock.h>
62 # define offsetof(type, field) ((size_t)(&((type *)0)->field))
65 /********************************************************************************
66 ********************************************************************************
67 Driver Variable Definitions
68 ********************************************************************************
69 ********************************************************************************/
73 * 0 - quiet, only emit warnings
74 * 1 - noisy, emit major function points and things done
75 * 2 - extremely noisy, emit trace items in loops, etc.
78 # define debug(level, fmt, args...) do { if (level <= MLY_DEBUG) printf("%s: " fmt "\n", __FUNCTION__ , ##args); } while(0)
79 # define debug_called(level) do { if (level <= MLY_DEBUG) printf(__FUNCTION__ ": called\n"); } while(0)
80 # define debug_struct(s) printf(" SIZE %s: %d\n", #s, sizeof(struct s))
81 # define debug_union(s) printf(" SIZE %s: %d\n", #s, sizeof(union s))
82 # define debug_field(s, f) printf(" OFFSET %s.%s: %d\n", #s, #f, ((int)&(((struct s *)0)->f)))
83 extern void mly_printstate0(void);
84 extern struct mly_softc *mly_softc0;
86 # define debug(level, fmt, args...)
87 # define debug_called(level)
88 # define debug_struct(s)
91 #define mly_printf(sc, fmt, args...) device_printf(sc->mly_dev, fmt , ##args)
94 * Per-device structure, used to save persistent state on devices.
96 * Note that this isn't really Bus/Target/Lun since we don't support
97 * lun != 0 at this time.
101 #define MLY_BTL_PHYSICAL (1<<0) /* physical device */
102 #define MLY_BTL_LOGICAL (1<<1) /* logical device */
103 #define MLY_BTL_PROTECTED (1<<2) /* device is protected - I/O not allowed */
104 #define MLY_BTL_RESCAN (1<<3) /* device needs to be rescanned */
105 char mb_name[16]; /* peripheral attached to this device */
106 int mb_state; /* see 8.1 */
107 int mb_type; /* see 8.2 */
109 /* physical devices only */
110 int mb_speed; /* interface transfer rate */
111 int mb_width; /* interface width */
115 * Per-command control structure.
118 TAILQ_ENTRY(mly_command) mc_link; /* list linkage */
120 struct mly_softc *mc_sc; /* controller that owns us */
121 u_int16_t mc_slot; /* command slot we occupy */
123 #define MLY_CMD_BUSY (1<<0) /* command is being run, or ready to run, or not completed */
124 #define MLY_CMD_COMPLETE (1<<1) /* command has been completed */
125 #define MLY_CMD_MAPPED (1<<3) /* command has had its data mapped */
126 #define MLY_CMD_DATAIN (1<<4) /* data moves controller->system */
127 #define MLY_CMD_DATAOUT (1<<5) /* data moves system->controller */
128 u_int16_t mc_status; /* command completion status */
129 u_int8_t mc_sense; /* sense data length */
130 int32_t mc_resid; /* I/O residual count */
132 union mly_command_packet *mc_packet; /* our controller command */
133 u_int64_t mc_packetphys; /* physical address of the mapped packet */
135 void *mc_data; /* data buffer */
136 size_t mc_length; /* data length */
137 bus_dmamap_t mc_datamap; /* DMA map for data */
139 void (* mc_complete)(struct mly_command *mc); /* completion handler */
140 void *mc_private; /* caller-private data */
145 * Command slot regulation.
147 * We can't use slot 0 due to the memory mailbox implementation.
149 #define MLY_SLOT_START 1
150 #define MLY_SLOT_MAX (MLY_SLOT_START + MLY_MAXCOMMANDS)
153 * Per-controller structure.
156 /* bus connections */
159 struct resource *mly_regs_resource; /* register interface window */
160 int mly_regs_rid; /* resource ID */
161 bus_space_handle_t mly_bhandle; /* bus space handle */
162 bus_space_tag_t mly_btag; /* bus space tag */
163 bus_dma_tag_t mly_parent_dmat; /* parent DMA tag */
164 bus_dma_tag_t mly_buffer_dmat; /* data buffer/command DMA tag */
165 struct resource *mly_irq; /* interrupt */
167 void *mly_intr; /* interrupt handle */
169 /* scatter/gather lists and their controller-visible mappings */
170 struct mly_sg_entry *mly_sg_table; /* s/g lists */
171 u_int32_t mly_sg_busaddr; /* s/g table base address in bus space */
172 bus_dma_tag_t mly_sg_dmat; /* s/g buffer DMA tag */
173 bus_dmamap_t mly_sg_dmamap; /* map for s/g buffers */
175 /* controller hardware interface */
177 #define MLY_HWIF_I960RX 0
178 #define MLY_HWIF_STRONGARM 1
179 u_int8_t mly_doorbell_true; /* xor map to make hardware doorbell 'true' bits into 1s */
180 u_int8_t mly_command_mailbox; /* register offsets */
181 u_int8_t mly_status_mailbox;
184 u_int8_t mly_error_status;
185 u_int8_t mly_interrupt_status;
186 u_int8_t mly_interrupt_mask;
187 struct mly_mmbox *mly_mmbox; /* kernel-space address of memory mailbox */
188 u_int64_t mly_mmbox_busaddr; /* bus-space address of memory mailbox */
189 bus_dma_tag_t mly_mmbox_dmat; /* memory mailbox DMA tag */
190 bus_dmamap_t mly_mmbox_dmamap; /* memory mailbox DMA map */
191 u_int32_t mly_mmbox_command_index; /* next index to use */
192 u_int32_t mly_mmbox_status_index; /* index we next expect status at */
194 /* controller features, limits and status */
196 #define MLY_STATE_SUSPEND (1<<0)
197 #define MLY_STATE_OPEN (1<<1)
198 #define MLY_STATE_INTERRUPTS_ON (1<<2)
199 #define MLY_STATE_MMBOX_ACTIVE (1<<3)
200 struct mly_ioctl_getcontrollerinfo *mly_controllerinfo;
201 struct mly_param_controller *mly_controllerparam;
202 struct mly_btl mly_btl[MLY_MAX_CHANNELS][MLY_MAX_TARGETS];
204 /* command management */
205 struct mly_command mly_command[MLY_MAXCOMMANDS]; /* commands */
206 union mly_command_packet *mly_packet; /* command packets */
207 bus_dma_tag_t mly_packet_dmat; /* packet DMA tag */
208 bus_dmamap_t mly_packetmap; /* packet DMA map */
209 u_int64_t mly_packetphys; /* packet array base address */
210 TAILQ_HEAD(,mly_command) mly_free; /* commands available for reuse */
211 TAILQ_HEAD(,mly_command) mly_ready; /* commands ready to be submitted */
212 TAILQ_HEAD(,mly_command) mly_busy;
213 TAILQ_HEAD(,mly_command) mly_complete; /* commands which have been returned by the controller */
214 struct mly_qstat mly_qstat[MLYQ_COUNT]; /* queue statistics */
216 /* health monitoring */
217 u_int32_t mly_event_change; /* event status change indicator */
218 u_int32_t mly_event_counter; /* next event for which we anticpiate status */
219 u_int32_t mly_event_waiting; /* next event the controller will post status for */
220 struct callout_handle mly_periodic; /* periodic event handling */
223 TAILQ_HEAD(,ccb_hdr) mly_cam_ccbq; /* outstanding I/O from CAM */
224 struct cam_sim *mly_cam_sim[MLY_MAX_CHANNELS];
227 #if __FreeBSD_version >= 500005
228 /* command-completion task */
229 struct task mly_task_complete; /* deferred-completion task */
234 * Register access helpers.
236 #define MLY_SET_REG(sc, reg, val) bus_space_write_1(sc->mly_btag, sc->mly_bhandle, reg, val)
237 #define MLY_GET_REG(sc, reg) bus_space_read_1 (sc->mly_btag, sc->mly_bhandle, reg)
238 #define MLY_GET_REG2(sc, reg) bus_space_read_2 (sc->mly_btag, sc->mly_bhandle, reg)
239 #define MLY_GET_REG4(sc, reg) bus_space_read_4 (sc->mly_btag, sc->mly_bhandle, reg)
241 #define MLY_SET_MBOX(sc, mbox, ptr) \
243 bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox, *((u_int32_t *)ptr)); \
244 bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox + 4, *((u_int32_t *)ptr + 1)); \
245 bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox + 8, *((u_int32_t *)ptr + 2)); \
246 bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox + 12, *((u_int32_t *)ptr + 3)); \
248 #define MLY_GET_MBOX(sc, mbox, ptr) \
250 *((u_int32_t *)ptr) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox); \
251 *((u_int32_t *)ptr + 1) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 4); \
252 *((u_int32_t *)ptr + 2) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 8); \
253 *((u_int32_t *)ptr + 3) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 12); \
256 #define MLY_IDBR_TRUE(sc, mask) \
257 ((((MLY_GET_REG((sc), (sc)->mly_idbr)) ^ (sc)->mly_doorbell_true) & (mask)) == (mask))
258 #define MLY_ODBR_TRUE(sc, mask) \
259 ((MLY_GET_REG((sc), (sc)->mly_odbr) & (mask)) == (mask))
260 #define MLY_ERROR_VALID(sc) \
261 ((((MLY_GET_REG((sc), (sc)->mly_error_status)) ^ (sc)->mly_doorbell_true) & (MLY_MSG_EMPTY)) == 0)
263 #define MLY_MASK_INTERRUPTS(sc) \
265 MLY_SET_REG((sc), (sc)->mly_interrupt_mask, MLY_INTERRUPT_MASK_DISABLE); \
266 sc->mly_state &= ~MLY_STATE_INTERRUPTS_ON; \
268 #define MLY_UNMASK_INTERRUPTS(sc) \
270 MLY_SET_REG((sc), (sc)->mly_interrupt_mask, MLY_INTERRUPT_MASK_ENABLE); \
271 sc->mly_state |= MLY_STATE_INTERRUPTS_ON; \
275 * Logical device number -> bus/target translation
277 #define MLY_LOGDEV_BUS(sc, x) (((x) / MLY_MAX_TARGETS) + (sc)->mly_controllerinfo->physical_channels_present)
278 #define MLY_LOGDEV_TARGET(x) ((x) % MLY_MAX_TARGETS)
281 * Public functions/variables
284 extern int mly_attach(struct mly_softc *sc);
285 extern void mly_detach(struct mly_softc *sc);
286 extern void mly_free(struct mly_softc *sc);
287 extern void mly_startio(struct mly_softc *sc);
288 extern void mly_done(struct mly_softc *sc);
289 extern int mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp);
290 extern void mly_release_command(struct mly_command *mc);
293 extern int mly_cam_attach(struct mly_softc *sc);
294 extern void mly_cam_detach(struct mly_softc *sc);
295 extern int mly_cam_command(struct mly_softc *sc, struct mly_command **mcp);
296 extern int mly_name_device(struct mly_softc *sc, int bus, int target);
298 /********************************************************************************
302 #define MLYQ_ADD(sc, qname) \
304 struct mly_qstat *qs = &(sc)->mly_qstat[qname]; \
307 if (qs->q_length > qs->q_max) \
308 qs->q_max = qs->q_length; \
311 #define MLYQ_REMOVE(sc, qname) (sc)->mly_qstat[qname].q_length--
312 #define MLYQ_INIT(sc, qname) \
314 sc->mly_qstat[qname].q_length = 0; \
315 sc->mly_qstat[qname].q_max = 0; \
319 #define MLYQ_COMMAND_QUEUE(name, index) \
320 static __inline void \
321 mly_initq_ ## name (struct mly_softc *sc) \
323 TAILQ_INIT(&sc->mly_ ## name); \
324 MLYQ_INIT(sc, index); \
326 static __inline void \
327 mly_enqueue_ ## name (struct mly_command *mc) \
332 TAILQ_INSERT_TAIL(&mc->mc_sc->mly_ ## name, mc, mc_link); \
333 MLYQ_ADD(mc->mc_sc, index); \
336 static __inline void \
337 mly_requeue_ ## name (struct mly_command *mc) \
342 TAILQ_INSERT_HEAD(&mc->mc_sc->mly_ ## name, mc, mc_link); \
343 MLYQ_ADD(mc->mc_sc, index); \
346 static __inline struct mly_command * \
347 mly_dequeue_ ## name (struct mly_softc *sc) \
349 struct mly_command *mc; \
353 if ((mc = TAILQ_FIRST(&sc->mly_ ## name)) != NULL) { \
354 TAILQ_REMOVE(&sc->mly_ ## name, mc, mc_link); \
355 MLYQ_REMOVE(sc, index); \
360 static __inline void \
361 mly_remove_ ## name (struct mly_command *mc) \
366 TAILQ_REMOVE(&mc->mc_sc->mly_ ## name, mc, mc_link); \
367 MLYQ_REMOVE(mc->mc_sc, index); \
372 MLYQ_COMMAND_QUEUE(free, MLYQ_FREE);
373 MLYQ_COMMAND_QUEUE(ready, MLYQ_READY);
374 MLYQ_COMMAND_QUEUE(busy, MLYQ_BUSY);
375 MLYQ_COMMAND_QUEUE(complete, MLYQ_COMPLETE);