xref: /freebsd/sys/dev/mfi/mfi_syspd.c (revision c99fb5f907eccde7b4c6d53e650e1a32a558f0d8)
1 /*-
2  * Redistribution and use in source and binary forms, with or without
3  * modification, are permitted provided that the following conditions
4  * are met:
5  *
6  *            Copyright 1994-2009 The FreeBSD Project.
7  *            All rights reserved.
8  *
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.
14  *
15  *    THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
17  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FREEBSD PROJECT OR
19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20  * EXEMPLARY,OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22  * PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY THEORY
23  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
24  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  *
27  * The views and conclusions contained in the software and documentation
28  * are those of the authors and should not be interpreted as representing
29  * official policies,either expressed or implied, of the FreeBSD Project.
30  */
31 
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34 
35 #include "opt_mfi.h"
36 
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/selinfo.h>
41 #include <sys/module.h>
42 #include <sys/malloc.h>
43 #include <sys/sysctl.h>
44 #include <sys/uio.h>
45 
46 #include <sys/bio.h>
47 #include <sys/bus.h>
48 #include <sys/conf.h>
49 #include <sys/disk.h>
50 #include <geom/geom_disk.h>
51 
52 #include <vm/vm.h>
53 #include <vm/pmap.h>
54 
55 #include <machine/md_var.h>
56 #include <machine/bus.h>
57 #include <sys/rman.h>
58 
59 #include <dev/mfi/mfireg.h>
60 #include <dev/mfi/mfi_ioctl.h>
61 #include <dev/mfi/mfivar.h>
62 
63 static int	mfi_syspd_probe(device_t dev);
64 static int	mfi_syspd_attach(device_t dev);
65 static int	mfi_syspd_detach(device_t dev);
66 
67 static disk_open_t	mfi_syspd_open;
68 static disk_close_t	mfi_syspd_close;
69 static disk_strategy_t	mfi_syspd_strategy;
70 static dumper_t		mfi_syspd_dump;
71 
72 static devclass_t	mfi_syspd_devclass;
73 
74 static device_method_t mfi_syspd_methods[] = {
75 	DEVMETHOD(device_probe,		mfi_syspd_probe),
76 	DEVMETHOD(device_attach,	mfi_syspd_attach),
77 	DEVMETHOD(device_detach,	mfi_syspd_detach),
78 	{ 0, 0 }
79 };
80 
81 static driver_t mfi_syspd_driver = {
82 	"mfisyspd",
83 	mfi_syspd_methods,
84 	sizeof(struct mfi_system_pd)
85 };
86 
87 DRIVER_MODULE(mfisyspd, mfi, mfi_syspd_driver, mfi_syspd_devclass, 0, 0);
88 
89 static int
90 mfi_syspd_probe(device_t dev)
91 {
92 	return (0);
93 }
94 
95 static int
96 mfi_syspd_attach(device_t dev)
97 {
98 	struct mfi_system_pd *sc;
99 	struct mfi_pd_info *pd_info;
100 	struct mfi_system_pending *syspd_pend;
101 	uint64_t sectors;
102 	uint32_t secsize;
103 
104 	sc = device_get_softc(dev);
105 	pd_info = device_get_ivars(dev);
106 	sc->pd_dev = dev;
107 	sc->pd_id = pd_info->ref.v.device_id;
108 	sc->pd_unit = device_get_unit(dev);
109 	sc->pd_info = pd_info;
110 	sc->pd_controller = device_get_softc(device_get_parent(dev));
111 	sc->pd_flags = 0;
112 
113 	sectors = pd_info->raw_size;
114 	secsize = MFI_SECTOR_LEN;
115 	mtx_lock(&sc->pd_controller->mfi_io_lock);
116 	TAILQ_INSERT_TAIL(&sc->pd_controller->mfi_syspd_tqh, sc, pd_link);
117 	TAILQ_FOREACH(syspd_pend, &sc->pd_controller->mfi_syspd_pend_tqh,
118 	    pd_link) {
119 		TAILQ_REMOVE(&sc->pd_controller->mfi_syspd_pend_tqh,
120 		    syspd_pend, pd_link);
121 		free(syspd_pend, M_MFIBUF);
122 		break;
123 	}
124 	mtx_unlock(&sc->pd_controller->mfi_io_lock);
125 	device_printf(dev, "%juMB (%ju sectors) SYSPD volume (deviceid: %d)\n",
126 		      sectors / (1024 * 1024 / secsize), sectors, sc->pd_id);
127 	sc->pd_disk = disk_alloc();
128 	sc->pd_disk->d_drv1 = sc;
129 	sc->pd_disk->d_maxsize = min(sc->pd_controller->mfi_max_io * secsize,
130 		(sc->pd_controller->mfi_max_sge - 1) * PAGE_SIZE);
131 	sc->pd_disk->d_name = "mfisyspd";
132 	sc->pd_disk->d_open = mfi_syspd_open;
133 	sc->pd_disk->d_close = mfi_syspd_close;
134 	sc->pd_disk->d_strategy = mfi_syspd_strategy;
135 	sc->pd_disk->d_dump = mfi_syspd_dump;
136 	sc->pd_disk->d_unit = sc->pd_unit;
137 	sc->pd_disk->d_sectorsize = secsize;
138 	sc->pd_disk->d_mediasize = sectors * secsize;
139 	if (sc->pd_disk->d_mediasize >= (1 * 1024 * 1024)) {
140 		sc->pd_disk->d_fwheads = 255;
141 		sc->pd_disk->d_fwsectors = 63;
142 	} else {
143 		sc->pd_disk->d_fwheads = 64;
144 		sc->pd_disk->d_fwsectors = 32;
145 	}
146 	disk_create(sc->pd_disk, DISK_VERSION);
147 
148 	device_printf(dev, " SYSPD volume attached\n");
149 
150 	return (0);
151 }
152 
153 static int
154 mfi_syspd_detach(device_t dev)
155 {
156 	struct mfi_system_pd *sc;
157 
158 	sc = device_get_softc(dev);
159 	device_printf(dev, "Detaching syspd\n");
160 	mtx_lock(&sc->pd_controller->mfi_io_lock);
161 	if (((sc->pd_disk->d_flags & DISKFLAG_OPEN) ||
162 	    (sc->pd_flags & MFI_DISK_FLAGS_OPEN)) &&
163 	    (sc->pd_controller->mfi_keep_deleted_volumes ||
164 	    sc->pd_controller->mfi_detaching)) {
165 		mtx_unlock(&sc->pd_controller->mfi_io_lock);
166 		device_printf(dev, "Cant detach syspd\n");
167 		return (EBUSY);
168 	}
169 	mtx_unlock(&sc->pd_controller->mfi_io_lock);
170 
171 	disk_destroy(sc->pd_disk);
172 	mtx_lock(&sc->pd_controller->mfi_io_lock);
173 	TAILQ_REMOVE(&sc->pd_controller->mfi_syspd_tqh, sc, pd_link);
174 	mtx_unlock(&sc->pd_controller->mfi_io_lock);
175 	free(sc->pd_info, M_MFIBUF);
176 	return (0);
177 }
178 
179 static int
180 mfi_syspd_open(struct disk *dp)
181 {
182 	struct mfi_system_pd *sc;
183 	int error;
184 
185 	sc = dp->d_drv1;
186 	mtx_lock(&sc->pd_controller->mfi_io_lock);
187 	if (sc->pd_flags & MFI_DISK_FLAGS_DISABLED)
188 		error = ENXIO;
189 	else {
190 		sc->pd_flags |= MFI_DISK_FLAGS_OPEN;
191 		error = 0;
192 	}
193 	mtx_unlock(&sc->pd_controller->mfi_io_lock);
194 	return (error);
195 }
196 
197 static int
198 mfi_syspd_close(struct disk *dp)
199 {
200 	struct mfi_system_pd *sc;
201 
202 	sc = dp->d_drv1;
203 	mtx_lock(&sc->pd_controller->mfi_io_lock);
204 	sc->pd_flags &= ~MFI_DISK_FLAGS_OPEN;
205 	mtx_unlock(&sc->pd_controller->mfi_io_lock);
206 
207 	return (0);
208 }
209 
210 int
211 mfi_syspd_disable(struct mfi_system_pd *sc)
212 {
213 
214 	device_printf(sc->pd_dev, "syspd disable \n");
215 	mtx_assert(&sc->pd_controller->mfi_io_lock, MA_OWNED);
216 	if (sc->pd_flags & MFI_DISK_FLAGS_OPEN) {
217 		if (sc->pd_controller->mfi_delete_busy_volumes)
218 			return (0);
219 		device_printf(sc->pd_dev,
220 		    "Unable to delete busy syspd device\n");
221 		return (EBUSY);
222 	}
223 	sc->pd_flags |= MFI_DISK_FLAGS_DISABLED;
224 	return (0);
225 }
226 
227 void
228 mfi_syspd_enable(struct mfi_system_pd *sc)
229 {
230 
231 	device_printf(sc->pd_dev, "syspd enable \n");
232 	mtx_assert(&sc->pd_controller->mfi_io_lock, MA_OWNED);
233 	sc->pd_flags &= ~MFI_DISK_FLAGS_DISABLED;
234 }
235 
236 static void
237 mfi_syspd_strategy(struct bio *bio)
238 {
239 	struct mfi_system_pd *sc;
240 	struct mfi_softc *controller;
241 
242 	sc = bio->bio_disk->d_drv1;
243 
244 	if (sc == NULL) {
245 		bio->bio_error = EINVAL;
246 		bio->bio_flags |= BIO_ERROR;
247 		bio->bio_resid = bio->bio_bcount;
248 		biodone(bio);
249 		return;
250 	}
251 
252 	controller = sc->pd_controller;
253 	bio->bio_driver1 = (void *)(uintptr_t)sc->pd_id;
254 	/* Mark it as system PD IO */
255 	bio->bio_driver2 = (void *)MFI_SYS_PD_IO;
256 	mtx_lock(&controller->mfi_io_lock);
257 	mfi_enqueue_bio(controller, bio);
258 	mfi_startio(controller);
259 	mtx_unlock(&controller->mfi_io_lock);
260 	return;
261 }
262 
263 static int
264 mfi_syspd_dump(void *arg, void *virt, vm_offset_t phys, off_t offset,
265     size_t len)
266 {
267 	struct mfi_system_pd *sc;
268 	struct mfi_softc *parent_sc;
269 	struct disk *dp;
270 	int error;
271 
272 	dp = arg;
273 	sc = dp->d_drv1;
274 	parent_sc = sc->pd_controller;
275 
276 	if (len > 0) {
277 		if ((error = mfi_dump_syspd_blocks(parent_sc,
278 		    sc->pd_id, offset / MFI_SECTOR_LEN, virt, len)) != 0)
279 			return (error);
280 	} else {
281 		/* mfi_sync_cache(parent_sc, sc->ld_id); */
282 	}
283 	return (0);
284 }
285