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Device layer rollup commit.
[dragonfly.git] / sys / dev / raid / mlx / mlxvar.h
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1/*-
2 * Copyright (c) 1999 Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/dev/mlx/mlxvar.h,v 1.5.2.3 2001/06/25 04:37:51 msmith Exp $
27 * $DragonFly: src/sys/dev/raid/mlx/mlxvar.h,v 1.4 2004/05/19 22:52:47 dillon Exp $
28 */
29
30/*
31 * Debugging levels:
32 * 0 - quiet, only emit warnings
33 * 1 - noisy, emit major function points and things done
34 * 2 - extremely noisy, emit trace items in loops, etc.
35 */
36#ifdef MLX_DEBUG
37#define debug(level, fmt, args...) do { if (level <= MLX_DEBUG) printf("%s: " fmt "\n", __FUNCTION__ , ##args); } while(0)
38#define debug_called(level) do { if (level <= MLX_DEBUG) printf(__FUNCTION__ ": called\n"); } while(0)
39#else
40#define debug(level, fmt, args...)
41#define debug_called(level)
42#endif
43
44/*
45 * Regardless of the actual capacity of the controller, we will allocate space
46 * for 64 s/g entries. Typically controllers support 17 or 33 entries (64k or
47 * 128k maximum transfer assuming 4k page size and non-optimal alignment), but
48 * making that fit cleanly without crossing page boundaries requires rounding up
49 * to the next power of two.
50 */
51#define MLX_NSEG 64
52
53#define MLX_NSLOTS 256 /* max number of command slots */
54
55#define MLX_MAXDRIVES 32 /* max number of system drives */
56
57/*
58 * Structure describing a System Drive as attached to the controller.
59 */
60struct mlx_sysdrive
61{
62 /* from MLX_CMD_ENQSYSDRIVE */
63 u_int32_t ms_size;
64 int ms_state;
65 int ms_raidlevel;
66
67 /* synthetic geometry */
68 int ms_cylinders;
69 int ms_heads;
70 int ms_sectors;
71
72 /* handle for attached driver */
73 device_t ms_disk;
74};
75
76/*
77 * Per-command control structure.
78 */
79struct mlx_command
80{
81 TAILQ_ENTRY(mlx_command) mc_link; /* list linkage */
82
83 struct mlx_softc *mc_sc; /* controller that owns us */
84 u_int8_t mc_slot; /* command slot we occupy */
85 u_int16_t mc_status; /* command completion status */
86 time_t mc_timeout; /* when this command expires */
87 u_int8_t mc_mailbox[16]; /* command mailbox */
88 u_int32_t mc_sgphys; /* physical address of s/g array in controller space */
89 int mc_nsgent; /* number of entries in s/g map */
90 int mc_flags;
91#define MLX_CMD_DATAIN (1<<0)
92#define MLX_CMD_DATAOUT (1<<1)
93#define MLX_CMD_PRIORITY (1<<2) /* high-priority command */
94
95 void *mc_data; /* data buffer */
96 size_t mc_length;
97 bus_dmamap_t mc_dmamap; /* DMA map for data */
98 u_int32_t mc_dataphys; /* data buffer base address controller space */
99
100 void (* mc_complete)(struct mlx_command *mc); /* completion handler */
101 void *mc_private; /* submitter-private data or wait channel */
102};
103
104/*
105 * Per-controller structure.
106 */
107struct mlx_softc
108{
109 /* bus connections */
110 device_t mlx_dev;
111 struct resource *mlx_mem; /* mailbox interface window */
112 int mlx_mem_rid;
113 int mlx_mem_type;
114 bus_space_handle_t mlx_bhandle; /* bus space handle */
115 bus_space_tag_t mlx_btag; /* bus space tag */
116 bus_dma_tag_t mlx_parent_dmat;/* parent DMA tag */
117 bus_dma_tag_t mlx_buffer_dmat;/* data buffer DMA tag */
118 struct resource *mlx_irq; /* interrupt */
119 void *mlx_intr; /* interrupt handle */
120
121 /* scatter/gather lists and their controller-visible mappings */
122 struct mlx_sgentry *mlx_sgtable; /* s/g lists */
123 u_int32_t mlx_sgbusaddr; /* s/g table base address in bus space */
124 bus_dma_tag_t mlx_sg_dmat; /* s/g buffer DMA tag */
125 bus_dmamap_t mlx_sg_dmamap; /* map for s/g buffers */
126
127 /* controller limits and features */
128 struct mlx_enquiry2 *mlx_enq2;
129 int mlx_feature; /* controller features/quirks */
130#define MLX_FEAT_PAUSEWORKS (1<<0) /* channel pause works as expected */
131
132 /* controller queues and arrays */
133 TAILQ_HEAD(, mlx_command) mlx_freecmds; /* command structures available for reuse */
134 TAILQ_HEAD(, mlx_command) mlx_work; /* active commands */
135 struct mlx_command *mlx_busycmd[MLX_NSLOTS]; /* busy commands */
136 int mlx_busycmds; /* count of busy commands */
137 struct mlx_sysdrive mlx_sysdrive[MLX_MAXDRIVES]; /* system drives */
138 mlx_bioq mlx_bioq; /* outstanding I/O operations */
139 int mlx_waitbufs; /* number of bufs awaiting commands */
140
141 /* controller status */
142 int mlx_geom;
143#define MLX_GEOM_128_32 0 /* geoemetry translation modes */
144#define MLX_GEOM_256_63 1
145 int mlx_state;
146#define MLX_STATE_INTEN (1<<0) /* interrupts have been enabled */
147#define MLX_STATE_SHUTDOWN (1<<1) /* controller is shut down */
148#define MLX_STATE_OPEN (1<<2) /* control device is open */
149#define MLX_STATE_SUSPEND (1<<3) /* controller is suspended */
150 struct callout_handle mlx_timeout; /* periodic status monitor */
151 time_t mlx_lastpoll; /* last time_second we polled for status */
152 u_int16_t mlx_lastevent; /* sequence number of the last event we recorded */
153 int mlx_currevent; /* sequence number last time we looked */
154 int mlx_background; /* if != 0 rebuild or check is in progress */
155#define MLX_BACKGROUND_CHECK 1 /* we started a check */
156#define MLX_BACKGROUND_REBUILD 2 /* we started a rebuild */
157#define MLX_BACKGROUND_SPONTANEOUS 3 /* it just happened somehow */
158 struct mlx_rebuild_status mlx_rebuildstat; /* last rebuild status */
159 struct mlx_pause mlx_pause; /* pending pause operation details */
160
161 int mlx_locks; /* reentrancy avoidance */
162 int mlx_flags;
163#define MLX_SPINUP_REPORTED (1<<0) /* "spinning up drives" message displayed */
164#define MLX_EVENTLOG_BUSY (1<<1) /* currently reading event log */
165
166 /* interface-specific accessor functions */
167 int mlx_iftype; /* interface protocol */
168#define MLX_IFTYPE_2 2
169#define MLX_IFTYPE_3 3
170#define MLX_IFTYPE_4 4
171#define MLX_IFTYPE_5 5
172 int (* mlx_tryqueue)(struct mlx_softc *sc, struct mlx_command *mc);
173 int (* mlx_findcomplete)(struct mlx_softc *sc, u_int8_t *slot, u_int16_t *status);
174 void (* mlx_intaction)(struct mlx_softc *sc, int action);
175 int (* mlx_fw_handshake)(struct mlx_softc *sc, int *error, int *param1, int *param2);
176#define MLX_INTACTION_DISABLE 0
177#define MLX_INTACTION_ENABLE 1
178};
179
180/*
181 * Simple (stupid) locks.
182 *
183 * Note that these are designed to avoid reentrancy, not concurrency, and will
184 * need to be replaced with something better.
185 */
186#define MLX_LOCK_COMPLETING (1<<0)
187#define MLX_LOCK_STARTING (1<<1)
188
189static __inline int
190mlx_lock_tas(struct mlx_softc *sc, int lock)
191{
192 if ((sc)->mlx_locks & (lock))
193 return(1);
194 atomic_set_int(&sc->mlx_locks, lock);
195 return(0);
196}
197
198static __inline void
199mlx_lock_clr(struct mlx_softc *sc, int lock)
200{
201 atomic_clear_int(&sc->mlx_locks, lock);
202}
203
204/*
205 * Interface between bus connections and driver core.
206 */
207extern void mlx_free(struct mlx_softc *sc);
208extern int mlx_attach(struct mlx_softc *sc);
209extern void mlx_startup(struct mlx_softc *sc);
210extern void mlx_intr(void *data);
211extern int mlx_detach(device_t dev);
212extern int mlx_shutdown(device_t dev);
213extern int mlx_suspend(device_t dev);
214extern int mlx_resume(device_t dev);
215extern d_open_t mlx_open;
216extern d_close_t mlx_close;
217extern d_ioctl_t mlx_ioctl;
218
219extern devclass_t mlx_devclass;
220extern devclass_t mlxd_devclass;
221
222/*
223 * Mylex System Disk driver
224 */
225struct mlxd_softc
226{
227 device_t mlxd_dev;
228 dev_t mlxd_dev_t;
229 struct mlx_softc *mlxd_controller;
230 struct mlx_sysdrive *mlxd_drive;
231 struct disk mlxd_disk;
232 struct devstat mlxd_stats;
233 struct disklabel mlxd_label;
234 int mlxd_unit;
235 int mlxd_flags;
236#define MLXD_OPEN (1<<0) /* drive is open (can't shut down) */
237};
238
239/*
240 * Interface between driver core and disk driver (should be using a bus?)
241 */
242extern int mlx_submit_buf(struct mlx_softc *sc, mlx_bio *bp);
243extern int mlx_submit_ioctl(struct mlx_softc *sc, struct mlx_sysdrive *drive, u_long cmd,
244 caddr_t addr, int32_t flag, d_thread_t *td);
245extern void mlxd_intr(void *data);
246
247
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