1/*-
2 * Implementation of the Target Mode 'Black Hole device' for CAM.
3 *
4 * Copyright (c) 1999 Justin T. Gibbs.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification, immediately at the beginning of the file.
13 * 2. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
| 1/*-
2 * Implementation of the Target Mode 'Black Hole device' for CAM.
3 *
4 * Copyright (c) 1999 Justin T. Gibbs.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification, immediately at the beginning of the file.
13 * 2. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
|
30__FBSDID("$FreeBSD: head/sys/cam/scsi/scsi_targ_bh.c 139743 2005-01-05 22:34:37Z imp $");
| 30__FBSDID("$FreeBSD: head/sys/cam/scsi/scsi_targ_bh.c 147723 2005-07-01 15:21:30Z avatar $");
|
31
32#include <sys/param.h>
33#include <sys/queue.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/types.h>
37#include <sys/bio.h>
38#include <sys/conf.h>
39#include <sys/devicestat.h>
40#include <sys/malloc.h>
41#include <sys/uio.h>
42
43#include <cam/cam.h>
44#include <cam/cam_ccb.h>
45#include <cam/cam_periph.h>
46#include <cam/cam_queue.h>
47#include <cam/cam_xpt_periph.h>
48#include <cam/cam_debug.h>
49
50#include <cam/scsi/scsi_all.h>
51#include <cam/scsi/scsi_message.h>
52
| 31
32#include <sys/param.h>
33#include <sys/queue.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/types.h>
37#include <sys/bio.h>
38#include <sys/conf.h>
39#include <sys/devicestat.h>
40#include <sys/malloc.h>
41#include <sys/uio.h>
42
43#include <cam/cam.h>
44#include <cam/cam_ccb.h>
45#include <cam/cam_periph.h>
46#include <cam/cam_queue.h>
47#include <cam/cam_xpt_periph.h>
48#include <cam/cam_debug.h>
49
50#include <cam/scsi/scsi_all.h>
51#include <cam/scsi/scsi_message.h>
52
|
| 53MALLOC_DEFINE(M_SCSIBH, "SCSI bh", "SCSI blackhole buffers");
54
|
53typedef enum {
54 TARGBH_STATE_NORMAL,
55 TARGBH_STATE_EXCEPTION,
56 TARGBH_STATE_TEARDOWN
57} targbh_state;
58
59typedef enum {
60 TARGBH_FLAG_NONE = 0x00,
61 TARGBH_FLAG_LUN_ENABLED = 0x01
62} targbh_flags;
63
64typedef enum {
65 TARGBH_CCB_WORKQ,
66 TARGBH_CCB_WAITING
67} targbh_ccb_types;
68
69#define MAX_ACCEPT 8
70#define MAX_IMMEDIATE 16
71#define MAX_BUF_SIZE 256 /* Max inquiry/sense/mode page transfer */
72
73/* Offsets into our private CCB area for storing accept information */
74#define ccb_type ppriv_field0
75#define ccb_descr ppriv_ptr1
76
77/* We stick a pointer to the originating accept TIO in each continue I/O CCB */
78#define ccb_atio ppriv_ptr1
79
80TAILQ_HEAD(ccb_queue, ccb_hdr);
81
82struct targbh_softc {
83 struct ccb_queue pending_queue;
84 struct ccb_queue work_queue;
85 struct ccb_queue unknown_atio_queue;
86 struct devstat device_stats;
87 targbh_state state;
88 targbh_flags flags;
89 u_int init_level;
90 u_int inq_data_len;
91 struct ccb_accept_tio *accept_tio_list;
92 struct ccb_hdr_slist immed_notify_slist;
93};
94
95struct targbh_cmd_desc {
96 struct ccb_accept_tio* atio_link;
97 u_int data_resid; /* How much left to transfer */
98 u_int data_increment;/* Amount to send before next disconnect */
99 void* data; /* The data. Can be from backing_store or not */
100 void* backing_store;/* Backing store allocated for this descriptor*/
101 u_int max_size; /* Size of backing_store */
102 u_int32_t timeout;
103 u_int8_t status; /* Status to return to initiator */
104};
105
106static struct scsi_inquiry_data no_lun_inq_data =
107{
108 T_NODEVICE | (SID_QUAL_BAD_LU << 5), 0,
109 /* version */2, /* format version */2
110};
111
112static struct scsi_sense_data no_lun_sense_data =
113{
114 SSD_CURRENT_ERROR|SSD_ERRCODE_VALID,
115 0,
116 SSD_KEY_NOT_READY,
117 { 0, 0, 0, 0 },
118 /*extra_len*/offsetof(struct scsi_sense_data, fru)
119 - offsetof(struct scsi_sense_data, extra_len),
120 { 0, 0, 0, 0 },
121 /* Logical Unit Not Supported */
122 /*ASC*/0x25, /*ASCQ*/0
123};
124
125static const int request_sense_size = offsetof(struct scsi_sense_data, fru);
126
127static periph_init_t targbhinit;
128static void targbhasync(void *callback_arg, u_int32_t code,
129 struct cam_path *path, void *arg);
130static cam_status targbhenlun(struct cam_periph *periph);
131static cam_status targbhdislun(struct cam_periph *periph);
132static periph_ctor_t targbhctor;
133static periph_dtor_t targbhdtor;
134static periph_start_t targbhstart;
135static void targbhdone(struct cam_periph *periph,
136 union ccb *done_ccb);
137#ifdef NOTYET
138static int targbherror(union ccb *ccb, u_int32_t cam_flags,
139 u_int32_t sense_flags);
140#endif
141static struct targbh_cmd_desc* targbhallocdescr(void);
142static void targbhfreedescr(struct targbh_cmd_desc *buf);
143
144static struct periph_driver targbhdriver =
145{
146 targbhinit, "targbh",
147 TAILQ_HEAD_INITIALIZER(targbhdriver.units), /* generation */ 0
148};
149
150PERIPHDRIVER_DECLARE(targbh, targbhdriver);
151
152static void
153targbhinit(void)
154{
155 cam_status status;
156 struct cam_path *path;
157
158 /*
159 * Install a global async callback. This callback will
160 * receive async callbacks like "new path registered".
161 */
162 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
163 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
164
165 if (status == CAM_REQ_CMP) {
166 struct ccb_setasync csa;
167
168 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
169 csa.ccb_h.func_code = XPT_SASYNC_CB;
170 csa.event_enable = AC_PATH_REGISTERED | AC_PATH_DEREGISTERED;
171 csa.callback = targbhasync;
172 csa.callback_arg = NULL;
173 xpt_action((union ccb *)&csa);
174 status = csa.ccb_h.status;
175 xpt_free_path(path);
176 }
177
178 if (status != CAM_REQ_CMP) {
179 printf("targbh: Failed to attach master async callback "
180 "due to status 0x%x!\n", status);
181 }
182}
183
184static void
185targbhasync(void *callback_arg, u_int32_t code,
186 struct cam_path *path, void *arg)
187{
188 struct cam_path *new_path;
189 struct ccb_pathinq *cpi;
190 path_id_t bus_path_id;
191 cam_status status;
192
193 cpi = (struct ccb_pathinq *)arg;
194 if (code == AC_PATH_REGISTERED)
195 bus_path_id = cpi->ccb_h.path_id;
196 else
197 bus_path_id = xpt_path_path_id(path);
198 /*
199 * Allocate a peripheral instance for
200 * this target instance.
201 */
202 status = xpt_create_path(&new_path, NULL,
203 bus_path_id,
204 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
205 if (status != CAM_REQ_CMP) {
206 printf("targbhasync: Unable to create path "
207 "due to status 0x%x\n", status);
208 return;
209 }
210
211 switch (code) {
212 case AC_PATH_REGISTERED:
213 {
214 /* Only attach to controllers that support target mode */
215 if ((cpi->target_sprt & PIT_PROCESSOR) == 0)
216 break;
217
218 status = cam_periph_alloc(targbhctor, NULL, targbhdtor,
219 targbhstart,
220 "targbh", CAM_PERIPH_BIO,
221 new_path, targbhasync,
222 AC_PATH_REGISTERED,
223 cpi);
224 break;
225 }
226 case AC_PATH_DEREGISTERED:
227 {
228 struct cam_periph *periph;
229
230 if ((periph = cam_periph_find(new_path, "targbh")) != NULL)
231 cam_periph_invalidate(periph);
232 break;
233 }
234 default:
235 break;
236 }
237 xpt_free_path(new_path);
238}
239
240/* Attempt to enable our lun */
241static cam_status
242targbhenlun(struct cam_periph *periph)
243{
244 union ccb immed_ccb;
245 struct targbh_softc *softc;
246 cam_status status;
247 int i;
248
249 softc = (struct targbh_softc *)periph->softc;
250
251 if ((softc->flags & TARGBH_FLAG_LUN_ENABLED) != 0)
252 return (CAM_REQ_CMP);
253
254 xpt_setup_ccb(&immed_ccb.ccb_h, periph->path, /*priority*/1);
255 immed_ccb.ccb_h.func_code = XPT_EN_LUN;
256
257 /* Don't need support for any vendor specific commands */
258 immed_ccb.cel.grp6_len = 0;
259 immed_ccb.cel.grp7_len = 0;
260 immed_ccb.cel.enable = 1;
261 xpt_action(&immed_ccb);
262 status = immed_ccb.ccb_h.status;
263 if (status != CAM_REQ_CMP) {
264 xpt_print_path(periph->path);
265 printf("targbhenlun - Enable Lun Rejected with status 0x%x\n",
266 status);
267 return (status);
268 }
269
270 softc->flags |= TARGBH_FLAG_LUN_ENABLED;
271
272 /*
273 * Build up a buffer of accept target I/O
274 * operations for incoming selections.
275 */
276 for (i = 0; i < MAX_ACCEPT; i++) {
277 struct ccb_accept_tio *atio;
278
| 55typedef enum {
56 TARGBH_STATE_NORMAL,
57 TARGBH_STATE_EXCEPTION,
58 TARGBH_STATE_TEARDOWN
59} targbh_state;
60
61typedef enum {
62 TARGBH_FLAG_NONE = 0x00,
63 TARGBH_FLAG_LUN_ENABLED = 0x01
64} targbh_flags;
65
66typedef enum {
67 TARGBH_CCB_WORKQ,
68 TARGBH_CCB_WAITING
69} targbh_ccb_types;
70
71#define MAX_ACCEPT 8
72#define MAX_IMMEDIATE 16
73#define MAX_BUF_SIZE 256 /* Max inquiry/sense/mode page transfer */
74
75/* Offsets into our private CCB area for storing accept information */
76#define ccb_type ppriv_field0
77#define ccb_descr ppriv_ptr1
78
79/* We stick a pointer to the originating accept TIO in each continue I/O CCB */
80#define ccb_atio ppriv_ptr1
81
82TAILQ_HEAD(ccb_queue, ccb_hdr);
83
84struct targbh_softc {
85 struct ccb_queue pending_queue;
86 struct ccb_queue work_queue;
87 struct ccb_queue unknown_atio_queue;
88 struct devstat device_stats;
89 targbh_state state;
90 targbh_flags flags;
91 u_int init_level;
92 u_int inq_data_len;
93 struct ccb_accept_tio *accept_tio_list;
94 struct ccb_hdr_slist immed_notify_slist;
95};
96
97struct targbh_cmd_desc {
98 struct ccb_accept_tio* atio_link;
99 u_int data_resid; /* How much left to transfer */
100 u_int data_increment;/* Amount to send before next disconnect */
101 void* data; /* The data. Can be from backing_store or not */
102 void* backing_store;/* Backing store allocated for this descriptor*/
103 u_int max_size; /* Size of backing_store */
104 u_int32_t timeout;
105 u_int8_t status; /* Status to return to initiator */
106};
107
108static struct scsi_inquiry_data no_lun_inq_data =
109{
110 T_NODEVICE | (SID_QUAL_BAD_LU << 5), 0,
111 /* version */2, /* format version */2
112};
113
114static struct scsi_sense_data no_lun_sense_data =
115{
116 SSD_CURRENT_ERROR|SSD_ERRCODE_VALID,
117 0,
118 SSD_KEY_NOT_READY,
119 { 0, 0, 0, 0 },
120 /*extra_len*/offsetof(struct scsi_sense_data, fru)
121 - offsetof(struct scsi_sense_data, extra_len),
122 { 0, 0, 0, 0 },
123 /* Logical Unit Not Supported */
124 /*ASC*/0x25, /*ASCQ*/0
125};
126
127static const int request_sense_size = offsetof(struct scsi_sense_data, fru);
128
129static periph_init_t targbhinit;
130static void targbhasync(void *callback_arg, u_int32_t code,
131 struct cam_path *path, void *arg);
132static cam_status targbhenlun(struct cam_periph *periph);
133static cam_status targbhdislun(struct cam_periph *periph);
134static periph_ctor_t targbhctor;
135static periph_dtor_t targbhdtor;
136static periph_start_t targbhstart;
137static void targbhdone(struct cam_periph *periph,
138 union ccb *done_ccb);
139#ifdef NOTYET
140static int targbherror(union ccb *ccb, u_int32_t cam_flags,
141 u_int32_t sense_flags);
142#endif
143static struct targbh_cmd_desc* targbhallocdescr(void);
144static void targbhfreedescr(struct targbh_cmd_desc *buf);
145
146static struct periph_driver targbhdriver =
147{
148 targbhinit, "targbh",
149 TAILQ_HEAD_INITIALIZER(targbhdriver.units), /* generation */ 0
150};
151
152PERIPHDRIVER_DECLARE(targbh, targbhdriver);
153
154static void
155targbhinit(void)
156{
157 cam_status status;
158 struct cam_path *path;
159
160 /*
161 * Install a global async callback. This callback will
162 * receive async callbacks like "new path registered".
163 */
164 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
165 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
166
167 if (status == CAM_REQ_CMP) {
168 struct ccb_setasync csa;
169
170 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
171 csa.ccb_h.func_code = XPT_SASYNC_CB;
172 csa.event_enable = AC_PATH_REGISTERED | AC_PATH_DEREGISTERED;
173 csa.callback = targbhasync;
174 csa.callback_arg = NULL;
175 xpt_action((union ccb *)&csa);
176 status = csa.ccb_h.status;
177 xpt_free_path(path);
178 }
179
180 if (status != CAM_REQ_CMP) {
181 printf("targbh: Failed to attach master async callback "
182 "due to status 0x%x!\n", status);
183 }
184}
185
186static void
187targbhasync(void *callback_arg, u_int32_t code,
188 struct cam_path *path, void *arg)
189{
190 struct cam_path *new_path;
191 struct ccb_pathinq *cpi;
192 path_id_t bus_path_id;
193 cam_status status;
194
195 cpi = (struct ccb_pathinq *)arg;
196 if (code == AC_PATH_REGISTERED)
197 bus_path_id = cpi->ccb_h.path_id;
198 else
199 bus_path_id = xpt_path_path_id(path);
200 /*
201 * Allocate a peripheral instance for
202 * this target instance.
203 */
204 status = xpt_create_path(&new_path, NULL,
205 bus_path_id,
206 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
207 if (status != CAM_REQ_CMP) {
208 printf("targbhasync: Unable to create path "
209 "due to status 0x%x\n", status);
210 return;
211 }
212
213 switch (code) {
214 case AC_PATH_REGISTERED:
215 {
216 /* Only attach to controllers that support target mode */
217 if ((cpi->target_sprt & PIT_PROCESSOR) == 0)
218 break;
219
220 status = cam_periph_alloc(targbhctor, NULL, targbhdtor,
221 targbhstart,
222 "targbh", CAM_PERIPH_BIO,
223 new_path, targbhasync,
224 AC_PATH_REGISTERED,
225 cpi);
226 break;
227 }
228 case AC_PATH_DEREGISTERED:
229 {
230 struct cam_periph *periph;
231
232 if ((periph = cam_periph_find(new_path, "targbh")) != NULL)
233 cam_periph_invalidate(periph);
234 break;
235 }
236 default:
237 break;
238 }
239 xpt_free_path(new_path);
240}
241
242/* Attempt to enable our lun */
243static cam_status
244targbhenlun(struct cam_periph *periph)
245{
246 union ccb immed_ccb;
247 struct targbh_softc *softc;
248 cam_status status;
249 int i;
250
251 softc = (struct targbh_softc *)periph->softc;
252
253 if ((softc->flags & TARGBH_FLAG_LUN_ENABLED) != 0)
254 return (CAM_REQ_CMP);
255
256 xpt_setup_ccb(&immed_ccb.ccb_h, periph->path, /*priority*/1);
257 immed_ccb.ccb_h.func_code = XPT_EN_LUN;
258
259 /* Don't need support for any vendor specific commands */
260 immed_ccb.cel.grp6_len = 0;
261 immed_ccb.cel.grp7_len = 0;
262 immed_ccb.cel.enable = 1;
263 xpt_action(&immed_ccb);
264 status = immed_ccb.ccb_h.status;
265 if (status != CAM_REQ_CMP) {
266 xpt_print_path(periph->path);
267 printf("targbhenlun - Enable Lun Rejected with status 0x%x\n",
268 status);
269 return (status);
270 }
271
272 softc->flags |= TARGBH_FLAG_LUN_ENABLED;
273
274 /*
275 * Build up a buffer of accept target I/O
276 * operations for incoming selections.
277 */
278 for (i = 0; i < MAX_ACCEPT; i++) {
279 struct ccb_accept_tio *atio;
280
|
279 atio = (struct ccb_accept_tio*)malloc(sizeof(*atio), M_DEVBUF,
| 281 atio = (struct ccb_accept_tio*)malloc(sizeof(*atio), M_SCSIBH,
|
280 M_NOWAIT);
281 if (atio == NULL) {
282 status = CAM_RESRC_UNAVAIL;
283 break;
284 }
285
286 atio->ccb_h.ccb_descr = targbhallocdescr();
287
288 if (atio->ccb_h.ccb_descr == NULL) {
| 282 M_NOWAIT);
283 if (atio == NULL) {
284 status = CAM_RESRC_UNAVAIL;
285 break;
286 }
287
288 atio->ccb_h.ccb_descr = targbhallocdescr();
289
290 if (atio->ccb_h.ccb_descr == NULL) {
|
289 free(atio, M_DEVBUF);
| 291 free(atio, M_SCSIBH);
|
290 status = CAM_RESRC_UNAVAIL;
291 break;
292 }
293
294 xpt_setup_ccb(&atio->ccb_h, periph->path, /*priority*/1);
295 atio->ccb_h.func_code = XPT_ACCEPT_TARGET_IO;
296 atio->ccb_h.cbfcnp = targbhdone;
297 xpt_action((union ccb *)atio);
298 status = atio->ccb_h.status;
299 if (status != CAM_REQ_INPROG) {
300 targbhfreedescr(atio->ccb_h.ccb_descr);
| 292 status = CAM_RESRC_UNAVAIL;
293 break;
294 }
295
296 xpt_setup_ccb(&atio->ccb_h, periph->path, /*priority*/1);
297 atio->ccb_h.func_code = XPT_ACCEPT_TARGET_IO;
298 atio->ccb_h.cbfcnp = targbhdone;
299 xpt_action((union ccb *)atio);
300 status = atio->ccb_h.status;
301 if (status != CAM_REQ_INPROG) {
302 targbhfreedescr(atio->ccb_h.ccb_descr);
|
301 free(atio, M_DEVBUF);
| 303 free(atio, M_SCSIBH);
|
302 break;
303 }
304 ((struct targbh_cmd_desc*)atio->ccb_h.ccb_descr)->atio_link =
305 softc->accept_tio_list;
306 softc->accept_tio_list = atio;
307 }
308
309 if (i == 0) {
310 xpt_print_path(periph->path);
311 printf("targbhenlun - Could not allocate accept tio CCBs: "
312 "status = 0x%x\n", status);
313 targbhdislun(periph);
314 return (CAM_REQ_CMP_ERR);
315 }
316
317 /*
318 * Build up a buffer of immediate notify CCBs
319 * so the SIM can tell us of asynchronous target mode events.
320 */
321 for (i = 0; i < MAX_ACCEPT; i++) {
322 struct ccb_immed_notify *inot;
323
| 304 break;
305 }
306 ((struct targbh_cmd_desc*)atio->ccb_h.ccb_descr)->atio_link =
307 softc->accept_tio_list;
308 softc->accept_tio_list = atio;
309 }
310
311 if (i == 0) {
312 xpt_print_path(periph->path);
313 printf("targbhenlun - Could not allocate accept tio CCBs: "
314 "status = 0x%x\n", status);
315 targbhdislun(periph);
316 return (CAM_REQ_CMP_ERR);
317 }
318
319 /*
320 * Build up a buffer of immediate notify CCBs
321 * so the SIM can tell us of asynchronous target mode events.
322 */
323 for (i = 0; i < MAX_ACCEPT; i++) {
324 struct ccb_immed_notify *inot;
325
|
324 inot = (struct ccb_immed_notify*)malloc(sizeof(*inot), M_DEVBUF,
| 326 inot = (struct ccb_immed_notify*)malloc(sizeof(*inot), M_SCSIBH,
|
325 M_NOWAIT);
326
327 if (inot == NULL) {
328 status = CAM_RESRC_UNAVAIL;
329 break;
330 }
331
332 xpt_setup_ccb(&inot->ccb_h, periph->path, /*priority*/1);
333 inot->ccb_h.func_code = XPT_IMMED_NOTIFY;
334 inot->ccb_h.cbfcnp = targbhdone;
335 xpt_action((union ccb *)inot);
336 status = inot->ccb_h.status;
337 if (status != CAM_REQ_INPROG) {
| 327 M_NOWAIT);
328
329 if (inot == NULL) {
330 status = CAM_RESRC_UNAVAIL;
331 break;
332 }
333
334 xpt_setup_ccb(&inot->ccb_h, periph->path, /*priority*/1);
335 inot->ccb_h.func_code = XPT_IMMED_NOTIFY;
336 inot->ccb_h.cbfcnp = targbhdone;
337 xpt_action((union ccb *)inot);
338 status = inot->ccb_h.status;
339 if (status != CAM_REQ_INPROG) {
|
338 free(inot, M_DEVBUF);
| 340 free(inot, M_SCSIBH);
|
339 break;
340 }
341 SLIST_INSERT_HEAD(&softc->immed_notify_slist, &inot->ccb_h,
342 periph_links.sle);
343 }
344
345 if (i == 0) {
346 xpt_print_path(periph->path);
347 printf("targbhenlun - Could not allocate immediate notify "
348 "CCBs: status = 0x%x\n", status);
349 targbhdislun(periph);
350 return (CAM_REQ_CMP_ERR);
351 }
352
353 return (CAM_REQ_CMP);
354}
355
356static cam_status
357targbhdislun(struct cam_periph *periph)
358{
359 union ccb ccb;
360 struct targbh_softc *softc;
361 struct ccb_accept_tio* atio;
362 struct ccb_hdr *ccb_h;
363
364 softc = (struct targbh_softc *)periph->softc;
365 if ((softc->flags & TARGBH_FLAG_LUN_ENABLED) == 0)
366 return CAM_REQ_CMP;
367
368 /* XXX Block for Continue I/O completion */
369
370 /* Kill off all ACCECPT and IMMEDIATE CCBs */
371 while ((atio = softc->accept_tio_list) != NULL) {
372
373 softc->accept_tio_list =
374 ((struct targbh_cmd_desc*)atio->ccb_h.ccb_descr)->atio_link;
375 xpt_setup_ccb(&ccb.cab.ccb_h, periph->path, /*priority*/1);
376 ccb.cab.ccb_h.func_code = XPT_ABORT;
377 ccb.cab.abort_ccb = (union ccb *)atio;
378 xpt_action(&ccb);
379 }
380
381 while ((ccb_h = SLIST_FIRST(&softc->immed_notify_slist)) != NULL) {
382 SLIST_REMOVE_HEAD(&softc->immed_notify_slist, periph_links.sle);
383 xpt_setup_ccb(&ccb.cab.ccb_h, periph->path, /*priority*/1);
384 ccb.cab.ccb_h.func_code = XPT_ABORT;
385 ccb.cab.abort_ccb = (union ccb *)ccb_h;
386 xpt_action(&ccb);
387 }
388
389 /*
390 * Dissable this lun.
391 */
392 xpt_setup_ccb(&ccb.cel.ccb_h, periph->path, /*priority*/1);
393 ccb.cel.ccb_h.func_code = XPT_EN_LUN;
394 ccb.cel.enable = 0;
395 xpt_action(&ccb);
396
397 if (ccb.cel.ccb_h.status != CAM_REQ_CMP)
398 printf("targbhdislun - Disabling lun on controller failed "
399 "with status 0x%x\n", ccb.cel.ccb_h.status);
400 else
401 softc->flags &= ~TARGBH_FLAG_LUN_ENABLED;
402 return (ccb.cel.ccb_h.status);
403}
404
405static cam_status
406targbhctor(struct cam_periph *periph, void *arg)
407{
408 struct targbh_softc *softc;
409
410 /* Allocate our per-instance private storage */
411 softc = (struct targbh_softc *)malloc(sizeof(*softc),
| 341 break;
342 }
343 SLIST_INSERT_HEAD(&softc->immed_notify_slist, &inot->ccb_h,
344 periph_links.sle);
345 }
346
347 if (i == 0) {
348 xpt_print_path(periph->path);
349 printf("targbhenlun - Could not allocate immediate notify "
350 "CCBs: status = 0x%x\n", status);
351 targbhdislun(periph);
352 return (CAM_REQ_CMP_ERR);
353 }
354
355 return (CAM_REQ_CMP);
356}
357
358static cam_status
359targbhdislun(struct cam_periph *periph)
360{
361 union ccb ccb;
362 struct targbh_softc *softc;
363 struct ccb_accept_tio* atio;
364 struct ccb_hdr *ccb_h;
365
366 softc = (struct targbh_softc *)periph->softc;
367 if ((softc->flags & TARGBH_FLAG_LUN_ENABLED) == 0)
368 return CAM_REQ_CMP;
369
370 /* XXX Block for Continue I/O completion */
371
372 /* Kill off all ACCECPT and IMMEDIATE CCBs */
373 while ((atio = softc->accept_tio_list) != NULL) {
374
375 softc->accept_tio_list =
376 ((struct targbh_cmd_desc*)atio->ccb_h.ccb_descr)->atio_link;
377 xpt_setup_ccb(&ccb.cab.ccb_h, periph->path, /*priority*/1);
378 ccb.cab.ccb_h.func_code = XPT_ABORT;
379 ccb.cab.abort_ccb = (union ccb *)atio;
380 xpt_action(&ccb);
381 }
382
383 while ((ccb_h = SLIST_FIRST(&softc->immed_notify_slist)) != NULL) {
384 SLIST_REMOVE_HEAD(&softc->immed_notify_slist, periph_links.sle);
385 xpt_setup_ccb(&ccb.cab.ccb_h, periph->path, /*priority*/1);
386 ccb.cab.ccb_h.func_code = XPT_ABORT;
387 ccb.cab.abort_ccb = (union ccb *)ccb_h;
388 xpt_action(&ccb);
389 }
390
391 /*
392 * Dissable this lun.
393 */
394 xpt_setup_ccb(&ccb.cel.ccb_h, periph->path, /*priority*/1);
395 ccb.cel.ccb_h.func_code = XPT_EN_LUN;
396 ccb.cel.enable = 0;
397 xpt_action(&ccb);
398
399 if (ccb.cel.ccb_h.status != CAM_REQ_CMP)
400 printf("targbhdislun - Disabling lun on controller failed "
401 "with status 0x%x\n", ccb.cel.ccb_h.status);
402 else
403 softc->flags &= ~TARGBH_FLAG_LUN_ENABLED;
404 return (ccb.cel.ccb_h.status);
405}
406
407static cam_status
408targbhctor(struct cam_periph *periph, void *arg)
409{
410 struct targbh_softc *softc;
411
412 /* Allocate our per-instance private storage */
413 softc = (struct targbh_softc *)malloc(sizeof(*softc),
|
412 M_DEVBUF, M_NOWAIT);
| 414 M_SCSIBH, M_NOWAIT);
|
413 if (softc == NULL) {
414 printf("targctor: unable to malloc softc\n");
415 return (CAM_REQ_CMP_ERR);
416 }
417
418 bzero(softc, sizeof(*softc));
419 TAILQ_INIT(&softc->pending_queue);
420 TAILQ_INIT(&softc->work_queue);
421 softc->accept_tio_list = NULL;
422 SLIST_INIT(&softc->immed_notify_slist);
423 softc->state = TARGBH_STATE_NORMAL;
424 periph->softc = softc;
425 softc->init_level++;
426
427 return (targbhenlun(periph));
428}
429
430static void
431targbhdtor(struct cam_periph *periph)
432{
433 struct targbh_softc *softc;
434
435 softc = (struct targbh_softc *)periph->softc;
436
437 softc->state = TARGBH_STATE_TEARDOWN;
438
439 targbhdislun(periph);
440
441 switch (softc->init_level) {
442 case 0:
443 panic("targdtor - impossible init level");;
444 case 1:
445 /* FALLTHROUGH */
446 default:
447 /* XXX Wait for callback of targbhdislun() */
448 tsleep(softc, PRIBIO, "targbh", hz/2);
| 415 if (softc == NULL) {
416 printf("targctor: unable to malloc softc\n");
417 return (CAM_REQ_CMP_ERR);
418 }
419
420 bzero(softc, sizeof(*softc));
421 TAILQ_INIT(&softc->pending_queue);
422 TAILQ_INIT(&softc->work_queue);
423 softc->accept_tio_list = NULL;
424 SLIST_INIT(&softc->immed_notify_slist);
425 softc->state = TARGBH_STATE_NORMAL;
426 periph->softc = softc;
427 softc->init_level++;
428
429 return (targbhenlun(periph));
430}
431
432static void
433targbhdtor(struct cam_periph *periph)
434{
435 struct targbh_softc *softc;
436
437 softc = (struct targbh_softc *)periph->softc;
438
439 softc->state = TARGBH_STATE_TEARDOWN;
440
441 targbhdislun(periph);
442
443 switch (softc->init_level) {
444 case 0:
445 panic("targdtor - impossible init level");;
446 case 1:
447 /* FALLTHROUGH */
448 default:
449 /* XXX Wait for callback of targbhdislun() */
450 tsleep(softc, PRIBIO, "targbh", hz/2);
|
449 free(softc, M_DEVBUF);
| 451 free(softc, M_SCSIBH);
|
450 break;
451 }
452}
453
454static void
455targbhstart(struct cam_periph *periph, union ccb *start_ccb)
456{
457 struct targbh_softc *softc;
458 struct ccb_hdr *ccbh;
459 struct ccb_accept_tio *atio;
460 struct targbh_cmd_desc *desc;
461 struct ccb_scsiio *csio;
462 ccb_flags flags;
463 int s;
464
465 softc = (struct targbh_softc *)periph->softc;
466
467 s = splbio();
468 ccbh = TAILQ_FIRST(&softc->work_queue);
469 if (periph->immediate_priority <= periph->pinfo.priority) {
470 start_ccb->ccb_h.ccb_type = TARGBH_CCB_WAITING;
471 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
472 periph_links.sle);
473 periph->immediate_priority = CAM_PRIORITY_NONE;
474 splx(s);
475 wakeup(&periph->ccb_list);
476 } else if (ccbh == NULL) {
477 splx(s);
478 xpt_release_ccb(start_ccb);
479 } else {
480 TAILQ_REMOVE(&softc->work_queue, ccbh, periph_links.tqe);
481 TAILQ_INSERT_HEAD(&softc->pending_queue, ccbh,
482 periph_links.tqe);
483 splx(s);
484 atio = (struct ccb_accept_tio*)ccbh;
485 desc = (struct targbh_cmd_desc *)atio->ccb_h.ccb_descr;
486
487 /* Is this a tagged request? */
488 flags = atio->ccb_h.flags &
489 (CAM_DIS_DISCONNECT|CAM_TAG_ACTION_VALID|CAM_DIR_MASK);
490
491 csio = &start_ccb->csio;
492 /*
493 * If we are done with the transaction, tell the
494 * controller to send status and perform a CMD_CMPLT.
495 * If we have associated sense data, see if we can
496 * send that too.
497 */
498 if (desc->data_resid == desc->data_increment) {
499 flags |= CAM_SEND_STATUS;
500 if (atio->sense_len) {
501 csio->sense_len = atio->sense_len;
502 csio->sense_data = atio->sense_data;
503 flags |= CAM_SEND_SENSE;
504 }
505
506 }
507
508 cam_fill_ctio(csio,
509 /*retries*/2,
510 targbhdone,
511 flags,
512 (flags & CAM_TAG_ACTION_VALID)?
513 MSG_SIMPLE_Q_TAG : 0,
514 atio->tag_id,
515 atio->init_id,
516 desc->status,
517 /*data_ptr*/desc->data_increment == 0
518 ? NULL : desc->data,
519 /*dxfer_len*/desc->data_increment,
520 /*timeout*/desc->timeout);
521
522 /* Override our wildcard attachment */
523 start_ccb->ccb_h.target_id = atio->ccb_h.target_id;
524 start_ccb->ccb_h.target_lun = atio->ccb_h.target_lun;
525
526 start_ccb->ccb_h.ccb_type = TARGBH_CCB_WORKQ;
527 start_ccb->ccb_h.ccb_atio = atio;
528 CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
529 ("Sending a CTIO\n"));
530 xpt_action(start_ccb);
531 /*
532 * If the queue was frozen waiting for the response
533 * to this ATIO (for instance disconnection was disallowed),
534 * then release it now that our response has been queued.
535 */
536 if ((atio->ccb_h.status & CAM_DEV_QFRZN) != 0) {
537 cam_release_devq(periph->path,
538 /*relsim_flags*/0,
539 /*reduction*/0,
540 /*timeout*/0,
541 /*getcount_only*/0);
542 atio->ccb_h.status &= ~CAM_DEV_QFRZN;
543 }
544 s = splbio();
545 ccbh = TAILQ_FIRST(&softc->work_queue);
546 splx(s);
547 }
548 if (ccbh != NULL)
549 xpt_schedule(periph, /*priority*/1);
550}
551
552static void
553targbhdone(struct cam_periph *periph, union ccb *done_ccb)
554{
555 struct targbh_softc *softc;
556
557 softc = (struct targbh_softc *)periph->softc;
558
559 if (done_ccb->ccb_h.ccb_type == TARGBH_CCB_WAITING) {
560 /* Caller will release the CCB */
561 wakeup(&done_ccb->ccb_h.cbfcnp);
562 return;
563 }
564
565 switch (done_ccb->ccb_h.func_code) {
566 case XPT_ACCEPT_TARGET_IO:
567 {
568 struct ccb_accept_tio *atio;
569 struct targbh_cmd_desc *descr;
570 u_int8_t *cdb;
571 int priority;
572
573 atio = &done_ccb->atio;
574 descr = (struct targbh_cmd_desc*)atio->ccb_h.ccb_descr;
575 cdb = atio->cdb_io.cdb_bytes;
576 if (softc->state == TARGBH_STATE_TEARDOWN
577 || atio->ccb_h.status == CAM_REQ_ABORTED) {
578 targbhfreedescr(descr);
| 452 break;
453 }
454}
455
456static void
457targbhstart(struct cam_periph *periph, union ccb *start_ccb)
458{
459 struct targbh_softc *softc;
460 struct ccb_hdr *ccbh;
461 struct ccb_accept_tio *atio;
462 struct targbh_cmd_desc *desc;
463 struct ccb_scsiio *csio;
464 ccb_flags flags;
465 int s;
466
467 softc = (struct targbh_softc *)periph->softc;
468
469 s = splbio();
470 ccbh = TAILQ_FIRST(&softc->work_queue);
471 if (periph->immediate_priority <= periph->pinfo.priority) {
472 start_ccb->ccb_h.ccb_type = TARGBH_CCB_WAITING;
473 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
474 periph_links.sle);
475 periph->immediate_priority = CAM_PRIORITY_NONE;
476 splx(s);
477 wakeup(&periph->ccb_list);
478 } else if (ccbh == NULL) {
479 splx(s);
480 xpt_release_ccb(start_ccb);
481 } else {
482 TAILQ_REMOVE(&softc->work_queue, ccbh, periph_links.tqe);
483 TAILQ_INSERT_HEAD(&softc->pending_queue, ccbh,
484 periph_links.tqe);
485 splx(s);
486 atio = (struct ccb_accept_tio*)ccbh;
487 desc = (struct targbh_cmd_desc *)atio->ccb_h.ccb_descr;
488
489 /* Is this a tagged request? */
490 flags = atio->ccb_h.flags &
491 (CAM_DIS_DISCONNECT|CAM_TAG_ACTION_VALID|CAM_DIR_MASK);
492
493 csio = &start_ccb->csio;
494 /*
495 * If we are done with the transaction, tell the
496 * controller to send status and perform a CMD_CMPLT.
497 * If we have associated sense data, see if we can
498 * send that too.
499 */
500 if (desc->data_resid == desc->data_increment) {
501 flags |= CAM_SEND_STATUS;
502 if (atio->sense_len) {
503 csio->sense_len = atio->sense_len;
504 csio->sense_data = atio->sense_data;
505 flags |= CAM_SEND_SENSE;
506 }
507
508 }
509
510 cam_fill_ctio(csio,
511 /*retries*/2,
512 targbhdone,
513 flags,
514 (flags & CAM_TAG_ACTION_VALID)?
515 MSG_SIMPLE_Q_TAG : 0,
516 atio->tag_id,
517 atio->init_id,
518 desc->status,
519 /*data_ptr*/desc->data_increment == 0
520 ? NULL : desc->data,
521 /*dxfer_len*/desc->data_increment,
522 /*timeout*/desc->timeout);
523
524 /* Override our wildcard attachment */
525 start_ccb->ccb_h.target_id = atio->ccb_h.target_id;
526 start_ccb->ccb_h.target_lun = atio->ccb_h.target_lun;
527
528 start_ccb->ccb_h.ccb_type = TARGBH_CCB_WORKQ;
529 start_ccb->ccb_h.ccb_atio = atio;
530 CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
531 ("Sending a CTIO\n"));
532 xpt_action(start_ccb);
533 /*
534 * If the queue was frozen waiting for the response
535 * to this ATIO (for instance disconnection was disallowed),
536 * then release it now that our response has been queued.
537 */
538 if ((atio->ccb_h.status & CAM_DEV_QFRZN) != 0) {
539 cam_release_devq(periph->path,
540 /*relsim_flags*/0,
541 /*reduction*/0,
542 /*timeout*/0,
543 /*getcount_only*/0);
544 atio->ccb_h.status &= ~CAM_DEV_QFRZN;
545 }
546 s = splbio();
547 ccbh = TAILQ_FIRST(&softc->work_queue);
548 splx(s);
549 }
550 if (ccbh != NULL)
551 xpt_schedule(periph, /*priority*/1);
552}
553
554static void
555targbhdone(struct cam_periph *periph, union ccb *done_ccb)
556{
557 struct targbh_softc *softc;
558
559 softc = (struct targbh_softc *)periph->softc;
560
561 if (done_ccb->ccb_h.ccb_type == TARGBH_CCB_WAITING) {
562 /* Caller will release the CCB */
563 wakeup(&done_ccb->ccb_h.cbfcnp);
564 return;
565 }
566
567 switch (done_ccb->ccb_h.func_code) {
568 case XPT_ACCEPT_TARGET_IO:
569 {
570 struct ccb_accept_tio *atio;
571 struct targbh_cmd_desc *descr;
572 u_int8_t *cdb;
573 int priority;
574
575 atio = &done_ccb->atio;
576 descr = (struct targbh_cmd_desc*)atio->ccb_h.ccb_descr;
577 cdb = atio->cdb_io.cdb_bytes;
578 if (softc->state == TARGBH_STATE_TEARDOWN
579 || atio->ccb_h.status == CAM_REQ_ABORTED) {
580 targbhfreedescr(descr);
|
579 free(done_ccb, M_DEVBUF);
| 581 xpt_free_ccb(done_ccb);
|
580 return;
581 }
582
583 /*
584 * Determine the type of incoming command and
585 * setup our buffer for a response.
586 */
587 switch (cdb[0]) {
588 case INQUIRY:
589 {
590 struct scsi_inquiry *inq;
591
592 inq = (struct scsi_inquiry *)cdb;
593 CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
594 ("Saw an inquiry!\n"));
595 /*
596 * Validate the command. We don't
597 * support any VPD pages, so complain
598 * if EVPD is set.
599 */
600 if ((inq->byte2 & SI_EVPD) != 0
601 || inq->page_code != 0) {
602 atio->ccb_h.flags &= ~CAM_DIR_MASK;
603 atio->ccb_h.flags |= CAM_DIR_NONE;
604 /*
605 * This needs to have other than a
606 * no_lun_sense_data response.
607 */
608 atio->sense_data = no_lun_sense_data;
609 atio->sense_len = sizeof(no_lun_sense_data);
610 descr->data_resid = 0;
611 descr->data_increment = 0;
612 descr->status = SCSI_STATUS_CHECK_COND;
613 break;
614 }
615 /*
616 * Direction is always relative
617 * to the initator.
618 */
619 atio->ccb_h.flags &= ~CAM_DIR_MASK;
620 atio->ccb_h.flags |= CAM_DIR_IN;
621 descr->data = &no_lun_inq_data;
622 descr->data_resid = MIN(sizeof(no_lun_inq_data),
623 SCSI_CDB6_LEN(inq->length));
624 descr->data_increment = descr->data_resid;
625 descr->timeout = 5 * 1000;
626 descr->status = SCSI_STATUS_OK;
627 break;
628 }
629 case REQUEST_SENSE:
630 {
631 struct scsi_request_sense *rsense;
632
633 rsense = (struct scsi_request_sense *)cdb;
634 /* Refer to static sense data */
635 atio->ccb_h.flags &= ~CAM_DIR_MASK;
636 atio->ccb_h.flags |= CAM_DIR_IN;
637 descr->data = &no_lun_sense_data;
638 descr->data_resid = request_sense_size;
639 descr->data_resid = MIN(descr->data_resid,
640 SCSI_CDB6_LEN(rsense->length));
641 descr->data_increment = descr->data_resid;
642 descr->timeout = 5 * 1000;
643 descr->status = SCSI_STATUS_OK;
644 break;
645 }
646 default:
647 /* Constant CA, tell initiator */
648 /* Direction is always relative to the initator */
649 atio->ccb_h.flags &= ~CAM_DIR_MASK;
650 atio->ccb_h.flags |= CAM_DIR_NONE;
651 atio->sense_data = no_lun_sense_data;
652 atio->sense_len = sizeof (no_lun_sense_data);
653 descr->data_resid = 0;
654 descr->data_increment = 0;
655 descr->timeout = 5 * 1000;
656 descr->status = SCSI_STATUS_CHECK_COND;
657 break;
658 }
659
660 /* Queue us up to receive a Continue Target I/O ccb. */
661 if ((atio->ccb_h.flags & CAM_DIS_DISCONNECT) != 0) {
662 TAILQ_INSERT_HEAD(&softc->work_queue, &atio->ccb_h,
663 periph_links.tqe);
664 priority = 0;
665 } else {
666 TAILQ_INSERT_TAIL(&softc->work_queue, &atio->ccb_h,
667 periph_links.tqe);
668 priority = 1;
669 }
670 xpt_schedule(periph, priority);
671 break;
672 }
673 case XPT_CONT_TARGET_IO:
674 {
675 struct ccb_accept_tio *atio;
676 struct targbh_cmd_desc *desc;
677
678 CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
679 ("Received completed CTIO\n"));
680 atio = (struct ccb_accept_tio*)done_ccb->ccb_h.ccb_atio;
681 desc = (struct targbh_cmd_desc *)atio->ccb_h.ccb_descr;
682
683 TAILQ_REMOVE(&softc->pending_queue, &atio->ccb_h,
684 periph_links.tqe);
685
686 /*
687 * We could check for CAM_SENT_SENSE bein set here,
688 * but since we're not maintaining any CA/UA state,
689 * there's no point.
690 */
691 atio->sense_len = 0;
692 done_ccb->ccb_h.flags &= ~CAM_SEND_SENSE;
693 done_ccb->ccb_h.status &= ~CAM_SENT_SENSE;
694
695 /*
696 * Any errors will not change the data we return,
697 * so make sure the queue is not left frozen.
698 * XXX - At some point there may be errors that
699 * leave us in a connected state with the
700 * initiator...
701 */
702 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
703 printf("Releasing Queue\n");
704 cam_release_devq(done_ccb->ccb_h.path,
705 /*relsim_flags*/0,
706 /*reduction*/0,
707 /*timeout*/0,
708 /*getcount_only*/0);
709 done_ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
710 }
711 desc->data_resid -= desc->data_increment;
712 xpt_release_ccb(done_ccb);
713 if (softc->state != TARGBH_STATE_TEARDOWN) {
714
715 /*
716 * Send the original accept TIO back to the
717 * controller to handle more work.
718 */
719 CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
720 ("Returning ATIO to target\n"));
721 /* Restore wildcards */
722 atio->ccb_h.target_id = CAM_TARGET_WILDCARD;
723 atio->ccb_h.target_lun = CAM_LUN_WILDCARD;
724 xpt_action((union ccb *)atio);
725 break;
726 } else {
727 targbhfreedescr(desc);
| 582 return;
583 }
584
585 /*
586 * Determine the type of incoming command and
587 * setup our buffer for a response.
588 */
589 switch (cdb[0]) {
590 case INQUIRY:
591 {
592 struct scsi_inquiry *inq;
593
594 inq = (struct scsi_inquiry *)cdb;
595 CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
596 ("Saw an inquiry!\n"));
597 /*
598 * Validate the command. We don't
599 * support any VPD pages, so complain
600 * if EVPD is set.
601 */
602 if ((inq->byte2 & SI_EVPD) != 0
603 || inq->page_code != 0) {
604 atio->ccb_h.flags &= ~CAM_DIR_MASK;
605 atio->ccb_h.flags |= CAM_DIR_NONE;
606 /*
607 * This needs to have other than a
608 * no_lun_sense_data response.
609 */
610 atio->sense_data = no_lun_sense_data;
611 atio->sense_len = sizeof(no_lun_sense_data);
612 descr->data_resid = 0;
613 descr->data_increment = 0;
614 descr->status = SCSI_STATUS_CHECK_COND;
615 break;
616 }
617 /*
618 * Direction is always relative
619 * to the initator.
620 */
621 atio->ccb_h.flags &= ~CAM_DIR_MASK;
622 atio->ccb_h.flags |= CAM_DIR_IN;
623 descr->data = &no_lun_inq_data;
624 descr->data_resid = MIN(sizeof(no_lun_inq_data),
625 SCSI_CDB6_LEN(inq->length));
626 descr->data_increment = descr->data_resid;
627 descr->timeout = 5 * 1000;
628 descr->status = SCSI_STATUS_OK;
629 break;
630 }
631 case REQUEST_SENSE:
632 {
633 struct scsi_request_sense *rsense;
634
635 rsense = (struct scsi_request_sense *)cdb;
636 /* Refer to static sense data */
637 atio->ccb_h.flags &= ~CAM_DIR_MASK;
638 atio->ccb_h.flags |= CAM_DIR_IN;
639 descr->data = &no_lun_sense_data;
640 descr->data_resid = request_sense_size;
641 descr->data_resid = MIN(descr->data_resid,
642 SCSI_CDB6_LEN(rsense->length));
643 descr->data_increment = descr->data_resid;
644 descr->timeout = 5 * 1000;
645 descr->status = SCSI_STATUS_OK;
646 break;
647 }
648 default:
649 /* Constant CA, tell initiator */
650 /* Direction is always relative to the initator */
651 atio->ccb_h.flags &= ~CAM_DIR_MASK;
652 atio->ccb_h.flags |= CAM_DIR_NONE;
653 atio->sense_data = no_lun_sense_data;
654 atio->sense_len = sizeof (no_lun_sense_data);
655 descr->data_resid = 0;
656 descr->data_increment = 0;
657 descr->timeout = 5 * 1000;
658 descr->status = SCSI_STATUS_CHECK_COND;
659 break;
660 }
661
662 /* Queue us up to receive a Continue Target I/O ccb. */
663 if ((atio->ccb_h.flags & CAM_DIS_DISCONNECT) != 0) {
664 TAILQ_INSERT_HEAD(&softc->work_queue, &atio->ccb_h,
665 periph_links.tqe);
666 priority = 0;
667 } else {
668 TAILQ_INSERT_TAIL(&softc->work_queue, &atio->ccb_h,
669 periph_links.tqe);
670 priority = 1;
671 }
672 xpt_schedule(periph, priority);
673 break;
674 }
675 case XPT_CONT_TARGET_IO:
676 {
677 struct ccb_accept_tio *atio;
678 struct targbh_cmd_desc *desc;
679
680 CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
681 ("Received completed CTIO\n"));
682 atio = (struct ccb_accept_tio*)done_ccb->ccb_h.ccb_atio;
683 desc = (struct targbh_cmd_desc *)atio->ccb_h.ccb_descr;
684
685 TAILQ_REMOVE(&softc->pending_queue, &atio->ccb_h,
686 periph_links.tqe);
687
688 /*
689 * We could check for CAM_SENT_SENSE bein set here,
690 * but since we're not maintaining any CA/UA state,
691 * there's no point.
692 */
693 atio->sense_len = 0;
694 done_ccb->ccb_h.flags &= ~CAM_SEND_SENSE;
695 done_ccb->ccb_h.status &= ~CAM_SENT_SENSE;
696
697 /*
698 * Any errors will not change the data we return,
699 * so make sure the queue is not left frozen.
700 * XXX - At some point there may be errors that
701 * leave us in a connected state with the
702 * initiator...
703 */
704 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
705 printf("Releasing Queue\n");
706 cam_release_devq(done_ccb->ccb_h.path,
707 /*relsim_flags*/0,
708 /*reduction*/0,
709 /*timeout*/0,
710 /*getcount_only*/0);
711 done_ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
712 }
713 desc->data_resid -= desc->data_increment;
714 xpt_release_ccb(done_ccb);
715 if (softc->state != TARGBH_STATE_TEARDOWN) {
716
717 /*
718 * Send the original accept TIO back to the
719 * controller to handle more work.
720 */
721 CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
722 ("Returning ATIO to target\n"));
723 /* Restore wildcards */
724 atio->ccb_h.target_id = CAM_TARGET_WILDCARD;
725 atio->ccb_h.target_lun = CAM_LUN_WILDCARD;
726 xpt_action((union ccb *)atio);
727 break;
728 } else {
729 targbhfreedescr(desc);
|
728 free(atio, M_DEVBUF);
| 730 free(atio, M_SCSIBH);
|
729 }
730 break;
731 }
732 case XPT_IMMED_NOTIFY:
733 {
734 int frozen;
735
736 frozen = (done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
737 if (softc->state == TARGBH_STATE_TEARDOWN
738 || done_ccb->ccb_h.status == CAM_REQ_ABORTED) {
739 printf("Freed an immediate notify\n");
| 731 }
732 break;
733 }
734 case XPT_IMMED_NOTIFY:
735 {
736 int frozen;
737
738 frozen = (done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
739 if (softc->state == TARGBH_STATE_TEARDOWN
740 || done_ccb->ccb_h.status == CAM_REQ_ABORTED) {
741 printf("Freed an immediate notify\n");
|
740 free(done_ccb, M_DEVBUF);
| 742 xpt_free_ccb(done_ccb);
|
741 } else {
742 /* Requeue for another immediate event */
743 xpt_action(done_ccb);
744 }
745 if (frozen != 0)
746 cam_release_devq(periph->path,
747 /*relsim_flags*/0,
748 /*opening reduction*/0,
749 /*timeout*/0,
750 /*getcount_only*/0);
751 break;
752 }
753 default:
754 panic("targbhdone: Unexpected ccb opcode");
755 break;
756 }
757}
758
759#ifdef NOTYET
760static int
761targbherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
762{
763 return 0;
764}
765#endif
766
767static struct targbh_cmd_desc*
768targbhallocdescr()
769{
770 struct targbh_cmd_desc* descr;
771
772 /* Allocate the targbh_descr structure */
773 descr = (struct targbh_cmd_desc *)malloc(sizeof(*descr),
| 743 } else {
744 /* Requeue for another immediate event */
745 xpt_action(done_ccb);
746 }
747 if (frozen != 0)
748 cam_release_devq(periph->path,
749 /*relsim_flags*/0,
750 /*opening reduction*/0,
751 /*timeout*/0,
752 /*getcount_only*/0);
753 break;
754 }
755 default:
756 panic("targbhdone: Unexpected ccb opcode");
757 break;
758 }
759}
760
761#ifdef NOTYET
762static int
763targbherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
764{
765 return 0;
766}
767#endif
768
769static struct targbh_cmd_desc*
770targbhallocdescr()
771{
772 struct targbh_cmd_desc* descr;
773
774 /* Allocate the targbh_descr structure */
775 descr = (struct targbh_cmd_desc *)malloc(sizeof(*descr),
|
774 M_DEVBUF, M_NOWAIT);
| 776 M_SCSIBH, M_NOWAIT);
|
775 if (descr == NULL)
776 return (NULL);
777
778 bzero(descr, sizeof(*descr));
779
780 /* Allocate buffer backing store */
| 777 if (descr == NULL)
778 return (NULL);
779
780 bzero(descr, sizeof(*descr));
781
782 /* Allocate buffer backing store */
|
781 descr->backing_store = malloc(MAX_BUF_SIZE, M_DEVBUF, M_NOWAIT);
| 783 descr->backing_store = malloc(MAX_BUF_SIZE, M_SCSIBH, M_NOWAIT);
|
782 if (descr->backing_store == NULL) {
| 784 if (descr->backing_store == NULL) {
|
783 free(descr, M_DEVBUF);
| 785 free(descr, M_SCSIBH);
|
784 return (NULL);
785 }
786 descr->max_size = MAX_BUF_SIZE;
787 return (descr);
788}
789
790static void
791targbhfreedescr(struct targbh_cmd_desc *descr)
792{
| 786 return (NULL);
787 }
788 descr->max_size = MAX_BUF_SIZE;
789 return (descr);
790}
791
792static void
793targbhfreedescr(struct targbh_cmd_desc *descr)
794{
|
793 free(descr->backing_store, M_DEVBUF);
794 free(descr, M_DEVBUF);
| 795 free(descr->backing_store, M_SCSIBH);
796 free(descr, M_SCSIBH);
|
795}
| 797}
|