2 * Copyright (c) 2014 Alexander Motin <mav@FreeBSD.org>
3 * Copyright (c) 2004, 2005 Silicon Graphics International Corp.
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 * without modification, immediately at the beginning of the file.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/types.h>
36 #include <sys/module.h>
37 #include <sys/mutex.h>
38 #include <sys/condvar.h>
39 #include <sys/malloc.h>
41 #include <sys/queue.h>
42 #include <sys/sysctl.h>
45 #include <cam/scsi/scsi_all.h>
46 #include <cam/scsi/scsi_da.h>
47 #include <cam/ctl/ctl_io.h>
48 #include <cam/ctl/ctl.h>
49 #include <cam/ctl/ctl_frontend.h>
50 #include <cam/ctl/ctl_util.h>
51 #include <cam/ctl/ctl_backend.h>
52 #include <cam/ctl/ctl_ioctl.h>
53 #include <cam/ctl/ctl_ha.h>
54 #include <cam/ctl/ctl_private.h>
55 #include <cam/ctl/ctl_debug.h>
56 #include <cam/ctl/ctl_scsi_all.h>
57 #include <cam/ctl/ctl_tpc.h>
58 #include <cam/ctl/ctl_error.h>
65 static struct tpcl_softc tpcl_softc;
67 static int tpcl_init(void);
68 static int tpcl_shutdown(void);
69 static void tpcl_datamove(union ctl_io *io);
70 static void tpcl_done(union ctl_io *io);
73 static struct ctl_frontend tpcl_frontend =
77 .shutdown = tpcl_shutdown,
79 CTL_FRONTEND_DECLARE(ctltpc, tpcl_frontend);
84 struct tpcl_softc *tsoftc = &tpcl_softc;
85 struct ctl_port *port;
86 struct scsi_transportid_spi *tid;
89 memset(tsoftc, 0, sizeof(*tsoftc));
92 port->frontend = &tpcl_frontend;
93 port->port_type = CTL_PORT_INTERNAL;
94 port->num_requested_ctl_io = 100;
95 port->port_name = "tpc";
96 port->fe_datamove = tpcl_datamove;
97 port->fe_done = tpcl_done;
99 port->max_initiators = 1;
101 if ((error = ctl_port_register(port)) != 0) {
102 printf("%s: tpc port registration failed\n", __func__);
106 len = sizeof(struct scsi_transportid_spi);
107 port->init_devid = malloc(sizeof(struct ctl_devid) + len,
108 M_CTL, M_WAITOK | M_ZERO);
109 port->init_devid->len = len;
110 tid = (struct scsi_transportid_spi *)port->init_devid->data;
111 tid->format_protocol = SCSI_TRN_SPI_FORMAT_DEFAULT | SCSI_PROTO_SPI;
112 scsi_ulto2b(0, tid->scsi_addr);
113 scsi_ulto2b(port->targ_port, tid->rel_trgt_port_id);
115 ctl_port_online(port);
122 struct tpcl_softc *tsoftc = &tpcl_softc;
123 struct ctl_port *port = &tsoftc->port;
126 ctl_port_offline(port);
127 if ((error = ctl_port_deregister(port)) != 0)
128 printf("%s: tpc port deregistration failed\n", __func__);
133 tpcl_datamove(union ctl_io *io)
135 struct ctl_sg_entry *ext_sglist, *kern_sglist;
136 struct ctl_sg_entry ext_entry, kern_entry;
137 int ext_sg_entries, kern_sg_entries;
138 int ext_sg_start, ext_offset;
140 int kern_watermark, ext_watermark;
141 struct ctl_scsiio *ctsio;
144 CTL_DEBUG_PRINT(("%s\n", __func__));
149 * If this is the case, we're probably doing a BBR read and don't
150 * actually need to transfer the data. This will effectively
151 * bit-bucket the data.
153 if (ctsio->ext_data_ptr == NULL)
157 * To simplify things here, if we have a single buffer, stick it in
158 * a S/G entry and just make it a single entry S/G list.
160 if (ctsio->ext_sg_entries > 0) {
163 ext_sglist = (struct ctl_sg_entry *)ctsio->ext_data_ptr;
164 ext_sg_entries = ctsio->ext_sg_entries;
168 for (i = 0; i < ext_sg_entries; i++) {
169 if ((len_seen + ext_sglist[i].len) >=
170 ctsio->ext_data_filled) {
172 ext_offset = ctsio->ext_data_filled - len_seen;
175 len_seen += ext_sglist[i].len;
178 ext_sglist = &ext_entry;
179 ext_sglist->addr = ctsio->ext_data_ptr;
180 ext_sglist->len = ctsio->ext_data_len;
183 ext_offset = ctsio->ext_data_filled;
186 if (ctsio->kern_sg_entries > 0) {
187 kern_sglist = (struct ctl_sg_entry *)ctsio->kern_data_ptr;
188 kern_sg_entries = ctsio->kern_sg_entries;
190 kern_sglist = &kern_entry;
191 kern_sglist->addr = ctsio->kern_data_ptr;
192 kern_sglist->len = ctsio->kern_data_len;
197 ext_watermark = ext_offset;
198 for (i = ext_sg_start, j = 0;
199 i < ext_sg_entries && j < kern_sg_entries;) {
200 uint8_t *ext_ptr, *kern_ptr;
202 len_to_copy = min(ext_sglist[i].len - ext_watermark,
203 kern_sglist[j].len - kern_watermark);
205 ext_ptr = (uint8_t *)ext_sglist[i].addr;
206 ext_ptr = ext_ptr + ext_watermark;
207 if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
211 panic("need to implement bus address support");
213 kern_ptr = bus_to_virt(kern_sglist[j].addr);
216 kern_ptr = (uint8_t *)kern_sglist[j].addr;
217 kern_ptr = kern_ptr + kern_watermark;
219 if ((ctsio->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
221 CTL_DEBUG_PRINT(("%s: copying %d bytes to user\n",
222 __func__, len_to_copy));
223 CTL_DEBUG_PRINT(("%s: from %p to %p\n", __func__,
225 memcpy(ext_ptr, kern_ptr, len_to_copy);
227 CTL_DEBUG_PRINT(("%s: copying %d bytes from user\n",
228 __func__, len_to_copy));
229 CTL_DEBUG_PRINT(("%s: from %p to %p\n", __func__,
231 memcpy(kern_ptr, ext_ptr, len_to_copy);
234 ctsio->ext_data_filled += len_to_copy;
235 ctsio->kern_data_resid -= len_to_copy;
237 ext_watermark += len_to_copy;
238 if (ext_sglist[i].len == ext_watermark) {
243 kern_watermark += len_to_copy;
244 if (kern_sglist[j].len == kern_watermark) {
250 CTL_DEBUG_PRINT(("%s: ext_sg_entries: %d, kern_sg_entries: %d\n",
251 __func__, ext_sg_entries, kern_sg_entries));
252 CTL_DEBUG_PRINT(("%s: ext_data_len = %d, kern_data_len = %d\n",
253 __func__, ctsio->ext_data_len, ctsio->kern_data_len));
256 io->scsiio.be_move_done(io);
260 tpcl_done(union ctl_io *io)
267 tpcl_resolve(struct ctl_softc *softc, int init_port,
268 struct scsi_ec_cscd *cscd, uint32_t *ss, uint32_t *ps, uint32_t *pso)
270 struct scsi_ec_cscd_id *cscdid;
271 struct ctl_port *port;
273 uint64_t lunid = UINT64_MAX;
275 if (cscd->type_code != EC_CSCD_ID ||
276 (cscd->luidt_pdt & EC_LUIDT_MASK) != EC_LUIDT_LUN ||
277 (cscd->luidt_pdt & EC_NUL) != 0)
280 cscdid = (struct scsi_ec_cscd_id *)cscd;
281 mtx_lock(&softc->ctl_lock);
283 port = softc->ctl_ports[init_port];
286 STAILQ_FOREACH(lun, &softc->lun_list, links) {
288 ctl_lun_map_to_port(port, lun->lun) == UINT32_MAX)
290 if (lun->lun_devid == NULL)
292 if (scsi_devid_match(lun->lun_devid->data,
293 lun->lun_devid->len, &cscdid->codeset,
294 cscdid->length + 4) == 0) {
296 if (ss && lun->be_lun)
297 *ss = lun->be_lun->blocksize;
298 if (ps && lun->be_lun)
299 *ps = lun->be_lun->blocksize <<
300 lun->be_lun->pblockexp;
301 if (pso && lun->be_lun)
302 *pso = lun->be_lun->blocksize *
303 lun->be_lun->pblockoff;
307 mtx_unlock(&softc->ctl_lock);
314 struct tpcl_softc *tsoftc = &tpcl_softc;
316 return (ctl_alloc_io(tsoftc->port.ctl_pool_ref));
320 tpcl_queue(union ctl_io *io, uint64_t lun)
322 struct tpcl_softc *tsoftc = &tpcl_softc;
324 io->io_hdr.nexus.initid = 0;
325 io->io_hdr.nexus.targ_port = tsoftc->port.targ_port;
326 io->io_hdr.nexus.targ_lun = lun;
327 io->scsiio.tag_num = atomic_fetchadd_int(&tsoftc->cur_tag_num, 1);
328 io->scsiio.ext_data_filled = 0;
329 return (ctl_queue(io));